17d2be074SHaavard Skinnemoen /* 27d2be074SHaavard Skinnemoen * Atmel MultiMedia Card Interface driver 37d2be074SHaavard Skinnemoen * 47d2be074SHaavard Skinnemoen * Copyright (C) 2004-2008 Atmel Corporation 57d2be074SHaavard Skinnemoen * 67d2be074SHaavard Skinnemoen * This program is free software; you can redistribute it and/or modify 77d2be074SHaavard Skinnemoen * it under the terms of the GNU General Public License version 2 as 87d2be074SHaavard Skinnemoen * published by the Free Software Foundation. 97d2be074SHaavard Skinnemoen */ 107d2be074SHaavard Skinnemoen #include <linux/blkdev.h> 117d2be074SHaavard Skinnemoen #include <linux/clk.h> 12deec9ae3SHaavard Skinnemoen #include <linux/debugfs.h> 137d2be074SHaavard Skinnemoen #include <linux/device.h> 1465e8b083SHaavard Skinnemoen #include <linux/dmaengine.h> 1565e8b083SHaavard Skinnemoen #include <linux/dma-mapping.h> 16fbfca4b8SBen Nizette #include <linux/err.h> 173c26e170SDavid Brownell #include <linux/gpio.h> 187d2be074SHaavard Skinnemoen #include <linux/init.h> 197d2be074SHaavard Skinnemoen #include <linux/interrupt.h> 207d2be074SHaavard Skinnemoen #include <linux/ioport.h> 217d2be074SHaavard Skinnemoen #include <linux/module.h> 227d2be074SHaavard Skinnemoen #include <linux/platform_device.h> 237d2be074SHaavard Skinnemoen #include <linux/scatterlist.h> 24deec9ae3SHaavard Skinnemoen #include <linux/seq_file.h> 255a0e3ad6STejun Heo #include <linux/slab.h> 26deec9ae3SHaavard Skinnemoen #include <linux/stat.h> 277d2be074SHaavard Skinnemoen 287d2be074SHaavard Skinnemoen #include <linux/mmc/host.h> 292f1d7918SNicolas Ferre #include <linux/mmc/sdio.h> 302635d1baSNicolas Ferre 312635d1baSNicolas Ferre #include <mach/atmel-mci.h> 32c42aa775SNicolas Ferre #include <linux/atmel-mci.h> 33796211b7SLudovic Desroches #include <linux/atmel_pdc.h> 347d2be074SHaavard Skinnemoen 357d2be074SHaavard Skinnemoen #include <asm/io.h> 367d2be074SHaavard Skinnemoen #include <asm/unaligned.h> 377d2be074SHaavard Skinnemoen 3804d699c3SRob Emanuele #include <mach/cpu.h> 393663b736SHaavard Skinnemoen #include <mach/board.h> 407d2be074SHaavard Skinnemoen 417d2be074SHaavard Skinnemoen #include "atmel-mci-regs.h" 427d2be074SHaavard Skinnemoen 432c96a293SLudovic Desroches #define ATMCI_DATA_ERROR_FLAGS (ATMCI_DCRCE | ATMCI_DTOE | ATMCI_OVRE | ATMCI_UNRE) 4465e8b083SHaavard Skinnemoen #define ATMCI_DMA_THRESHOLD 16 457d2be074SHaavard Skinnemoen 467d2be074SHaavard Skinnemoen enum { 477d2be074SHaavard Skinnemoen EVENT_CMD_COMPLETE = 0, 487d2be074SHaavard Skinnemoen EVENT_XFER_COMPLETE, 49c06ad258SHaavard Skinnemoen EVENT_DATA_COMPLETE, 50c06ad258SHaavard Skinnemoen EVENT_DATA_ERROR, 51c06ad258SHaavard Skinnemoen }; 52c06ad258SHaavard Skinnemoen 53c06ad258SHaavard Skinnemoen enum atmel_mci_state { 54965ebf33SHaavard Skinnemoen STATE_IDLE = 0, 55965ebf33SHaavard Skinnemoen STATE_SENDING_CMD, 56c06ad258SHaavard Skinnemoen STATE_SENDING_DATA, 57c06ad258SHaavard Skinnemoen STATE_DATA_BUSY, 58c06ad258SHaavard Skinnemoen STATE_SENDING_STOP, 59c06ad258SHaavard Skinnemoen STATE_DATA_ERROR, 607d2be074SHaavard Skinnemoen }; 617d2be074SHaavard Skinnemoen 62796211b7SLudovic Desroches enum atmci_xfer_dir { 63796211b7SLudovic Desroches XFER_RECEIVE = 0, 64796211b7SLudovic Desroches XFER_TRANSMIT, 65796211b7SLudovic Desroches }; 66796211b7SLudovic Desroches 67796211b7SLudovic Desroches enum atmci_pdc_buf { 68796211b7SLudovic Desroches PDC_FIRST_BUF = 0, 69796211b7SLudovic Desroches PDC_SECOND_BUF, 70796211b7SLudovic Desroches }; 71796211b7SLudovic Desroches 72796211b7SLudovic Desroches struct atmel_mci_caps { 73796211b7SLudovic Desroches bool has_dma; 74796211b7SLudovic Desroches bool has_pdc; 75796211b7SLudovic Desroches bool has_cfg_reg; 76796211b7SLudovic Desroches bool has_cstor_reg; 77796211b7SLudovic Desroches bool has_highspeed; 78796211b7SLudovic Desroches bool has_rwproof; 79796211b7SLudovic Desroches }; 80796211b7SLudovic Desroches 8165e8b083SHaavard Skinnemoen struct atmel_mci_dma { 8265e8b083SHaavard Skinnemoen struct dma_chan *chan; 8365e8b083SHaavard Skinnemoen struct dma_async_tx_descriptor *data_desc; 8465e8b083SHaavard Skinnemoen }; 8565e8b083SHaavard Skinnemoen 86965ebf33SHaavard Skinnemoen /** 87965ebf33SHaavard Skinnemoen * struct atmel_mci - MMC controller state shared between all slots 88965ebf33SHaavard Skinnemoen * @lock: Spinlock protecting the queue and associated data. 89965ebf33SHaavard Skinnemoen * @regs: Pointer to MMIO registers. 90796211b7SLudovic Desroches * @sg: Scatterlist entry currently being processed by PIO or PDC code. 91965ebf33SHaavard Skinnemoen * @pio_offset: Offset into the current scatterlist entry. 92965ebf33SHaavard Skinnemoen * @cur_slot: The slot which is currently using the controller. 93965ebf33SHaavard Skinnemoen * @mrq: The request currently being processed on @cur_slot, 94965ebf33SHaavard Skinnemoen * or NULL if the controller is idle. 95965ebf33SHaavard Skinnemoen * @cmd: The command currently being sent to the card, or NULL. 96965ebf33SHaavard Skinnemoen * @data: The data currently being transferred, or NULL if no data 97965ebf33SHaavard Skinnemoen * transfer is in progress. 98796211b7SLudovic Desroches * @data_size: just data->blocks * data->blksz. 9965e8b083SHaavard Skinnemoen * @dma: DMA client state. 10065e8b083SHaavard Skinnemoen * @data_chan: DMA channel being used for the current data transfer. 101965ebf33SHaavard Skinnemoen * @cmd_status: Snapshot of SR taken upon completion of the current 102965ebf33SHaavard Skinnemoen * command. Only valid when EVENT_CMD_COMPLETE is pending. 103965ebf33SHaavard Skinnemoen * @data_status: Snapshot of SR taken upon completion of the current 104965ebf33SHaavard Skinnemoen * data transfer. Only valid when EVENT_DATA_COMPLETE or 105965ebf33SHaavard Skinnemoen * EVENT_DATA_ERROR is pending. 106965ebf33SHaavard Skinnemoen * @stop_cmdr: Value to be loaded into CMDR when the stop command is 107965ebf33SHaavard Skinnemoen * to be sent. 108965ebf33SHaavard Skinnemoen * @tasklet: Tasklet running the request state machine. 109965ebf33SHaavard Skinnemoen * @pending_events: Bitmask of events flagged by the interrupt handler 110965ebf33SHaavard Skinnemoen * to be processed by the tasklet. 111965ebf33SHaavard Skinnemoen * @completed_events: Bitmask of events which the state machine has 112965ebf33SHaavard Skinnemoen * processed. 113965ebf33SHaavard Skinnemoen * @state: Tasklet state. 114965ebf33SHaavard Skinnemoen * @queue: List of slots waiting for access to the controller. 115965ebf33SHaavard Skinnemoen * @need_clock_update: Update the clock rate before the next request. 116965ebf33SHaavard Skinnemoen * @need_reset: Reset controller before next request. 117965ebf33SHaavard Skinnemoen * @mode_reg: Value of the MR register. 11874791a2dSNicolas Ferre * @cfg_reg: Value of the CFG register. 119965ebf33SHaavard Skinnemoen * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus 120965ebf33SHaavard Skinnemoen * rate and timeout calculations. 121965ebf33SHaavard Skinnemoen * @mapbase: Physical address of the MMIO registers. 122965ebf33SHaavard Skinnemoen * @mck: The peripheral bus clock hooked up to the MMC controller. 123965ebf33SHaavard Skinnemoen * @pdev: Platform device associated with the MMC controller. 124965ebf33SHaavard Skinnemoen * @slot: Slots sharing this MMC controller. 125796211b7SLudovic Desroches * @caps: MCI capabilities depending on MCI version. 126796211b7SLudovic Desroches * @prepare_data: function to setup MCI before data transfer which 127796211b7SLudovic Desroches * depends on MCI capabilities. 128796211b7SLudovic Desroches * @submit_data: function to start data transfer which depends on MCI 129796211b7SLudovic Desroches * capabilities. 130796211b7SLudovic Desroches * @stop_transfer: function to stop data transfer which depends on MCI 131796211b7SLudovic Desroches * capabilities. 132965ebf33SHaavard Skinnemoen * 133965ebf33SHaavard Skinnemoen * Locking 134965ebf33SHaavard Skinnemoen * ======= 135965ebf33SHaavard Skinnemoen * 136965ebf33SHaavard Skinnemoen * @lock is a softirq-safe spinlock protecting @queue as well as 137965ebf33SHaavard Skinnemoen * @cur_slot, @mrq and @state. These must always be updated 138965ebf33SHaavard Skinnemoen * at the same time while holding @lock. 139965ebf33SHaavard Skinnemoen * 140965ebf33SHaavard Skinnemoen * @lock also protects mode_reg and need_clock_update since these are 141965ebf33SHaavard Skinnemoen * used to synchronize mode register updates with the queue 142965ebf33SHaavard Skinnemoen * processing. 143965ebf33SHaavard Skinnemoen * 144965ebf33SHaavard Skinnemoen * The @mrq field of struct atmel_mci_slot is also protected by @lock, 145965ebf33SHaavard Skinnemoen * and must always be written at the same time as the slot is added to 146965ebf33SHaavard Skinnemoen * @queue. 147965ebf33SHaavard Skinnemoen * 148965ebf33SHaavard Skinnemoen * @pending_events and @completed_events are accessed using atomic bit 149965ebf33SHaavard Skinnemoen * operations, so they don't need any locking. 150965ebf33SHaavard Skinnemoen * 151965ebf33SHaavard Skinnemoen * None of the fields touched by the interrupt handler need any 152965ebf33SHaavard Skinnemoen * locking. However, ordering is important: Before EVENT_DATA_ERROR or 153965ebf33SHaavard Skinnemoen * EVENT_DATA_COMPLETE is set in @pending_events, all data-related 154965ebf33SHaavard Skinnemoen * interrupts must be disabled and @data_status updated with a 155965ebf33SHaavard Skinnemoen * snapshot of SR. Similarly, before EVENT_CMD_COMPLETE is set, the 15625985edcSLucas De Marchi * CMDRDY interrupt must be disabled and @cmd_status updated with a 157965ebf33SHaavard Skinnemoen * snapshot of SR, and before EVENT_XFER_COMPLETE can be set, the 158965ebf33SHaavard Skinnemoen * bytes_xfered field of @data must be written. This is ensured by 159965ebf33SHaavard Skinnemoen * using barriers. 160965ebf33SHaavard Skinnemoen */ 1617d2be074SHaavard Skinnemoen struct atmel_mci { 162965ebf33SHaavard Skinnemoen spinlock_t lock; 1637d2be074SHaavard Skinnemoen void __iomem *regs; 1647d2be074SHaavard Skinnemoen 1657d2be074SHaavard Skinnemoen struct scatterlist *sg; 1667d2be074SHaavard Skinnemoen unsigned int pio_offset; 1677d2be074SHaavard Skinnemoen 168965ebf33SHaavard Skinnemoen struct atmel_mci_slot *cur_slot; 1697d2be074SHaavard Skinnemoen struct mmc_request *mrq; 1707d2be074SHaavard Skinnemoen struct mmc_command *cmd; 1717d2be074SHaavard Skinnemoen struct mmc_data *data; 172796211b7SLudovic Desroches unsigned int data_size; 1737d2be074SHaavard Skinnemoen 17465e8b083SHaavard Skinnemoen struct atmel_mci_dma dma; 17565e8b083SHaavard Skinnemoen struct dma_chan *data_chan; 17665e8b083SHaavard Skinnemoen 1777d2be074SHaavard Skinnemoen u32 cmd_status; 1787d2be074SHaavard Skinnemoen u32 data_status; 1797d2be074SHaavard Skinnemoen u32 stop_cmdr; 1807d2be074SHaavard Skinnemoen 1817d2be074SHaavard Skinnemoen struct tasklet_struct tasklet; 1827d2be074SHaavard Skinnemoen unsigned long pending_events; 1837d2be074SHaavard Skinnemoen unsigned long completed_events; 184c06ad258SHaavard Skinnemoen enum atmel_mci_state state; 185965ebf33SHaavard Skinnemoen struct list_head queue; 1867d2be074SHaavard Skinnemoen 187965ebf33SHaavard Skinnemoen bool need_clock_update; 188965ebf33SHaavard Skinnemoen bool need_reset; 189965ebf33SHaavard Skinnemoen u32 mode_reg; 19074791a2dSNicolas Ferre u32 cfg_reg; 1917d2be074SHaavard Skinnemoen unsigned long bus_hz; 1927d2be074SHaavard Skinnemoen unsigned long mapbase; 1937d2be074SHaavard Skinnemoen struct clk *mck; 1947d2be074SHaavard Skinnemoen struct platform_device *pdev; 195965ebf33SHaavard Skinnemoen 1962c96a293SLudovic Desroches struct atmel_mci_slot *slot[ATMCI_MAX_NR_SLOTS]; 197796211b7SLudovic Desroches 198796211b7SLudovic Desroches struct atmel_mci_caps caps; 199796211b7SLudovic Desroches 200796211b7SLudovic Desroches u32 (*prepare_data)(struct atmel_mci *host, struct mmc_data *data); 201796211b7SLudovic Desroches void (*submit_data)(struct atmel_mci *host, struct mmc_data *data); 202796211b7SLudovic Desroches void (*stop_transfer)(struct atmel_mci *host); 203965ebf33SHaavard Skinnemoen }; 204965ebf33SHaavard Skinnemoen 205965ebf33SHaavard Skinnemoen /** 206965ebf33SHaavard Skinnemoen * struct atmel_mci_slot - MMC slot state 207965ebf33SHaavard Skinnemoen * @mmc: The mmc_host representing this slot. 208965ebf33SHaavard Skinnemoen * @host: The MMC controller this slot is using. 209965ebf33SHaavard Skinnemoen * @sdc_reg: Value of SDCR to be written before using this slot. 21088ff82edSAnders Grahn * @sdio_irq: SDIO irq mask for this slot. 211965ebf33SHaavard Skinnemoen * @mrq: mmc_request currently being processed or waiting to be 212965ebf33SHaavard Skinnemoen * processed, or NULL when the slot is idle. 213965ebf33SHaavard Skinnemoen * @queue_node: List node for placing this node in the @queue list of 214965ebf33SHaavard Skinnemoen * &struct atmel_mci. 215965ebf33SHaavard Skinnemoen * @clock: Clock rate configured by set_ios(). Protected by host->lock. 216965ebf33SHaavard Skinnemoen * @flags: Random state bits associated with the slot. 217965ebf33SHaavard Skinnemoen * @detect_pin: GPIO pin used for card detection, or negative if not 218965ebf33SHaavard Skinnemoen * available. 219965ebf33SHaavard Skinnemoen * @wp_pin: GPIO pin used for card write protect sending, or negative 220965ebf33SHaavard Skinnemoen * if not available. 2211c1452beSJonas Larsson * @detect_is_active_high: The state of the detect pin when it is active. 222965ebf33SHaavard Skinnemoen * @detect_timer: Timer used for debouncing @detect_pin interrupts. 223965ebf33SHaavard Skinnemoen */ 224965ebf33SHaavard Skinnemoen struct atmel_mci_slot { 225965ebf33SHaavard Skinnemoen struct mmc_host *mmc; 226965ebf33SHaavard Skinnemoen struct atmel_mci *host; 227965ebf33SHaavard Skinnemoen 228965ebf33SHaavard Skinnemoen u32 sdc_reg; 22988ff82edSAnders Grahn u32 sdio_irq; 230965ebf33SHaavard Skinnemoen 231965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 232965ebf33SHaavard Skinnemoen struct list_head queue_node; 233965ebf33SHaavard Skinnemoen 234965ebf33SHaavard Skinnemoen unsigned int clock; 235965ebf33SHaavard Skinnemoen unsigned long flags; 236965ebf33SHaavard Skinnemoen #define ATMCI_CARD_PRESENT 0 237965ebf33SHaavard Skinnemoen #define ATMCI_CARD_NEED_INIT 1 238965ebf33SHaavard Skinnemoen #define ATMCI_SHUTDOWN 2 2395c2f2b9bSNicolas Ferre #define ATMCI_SUSPENDED 3 240965ebf33SHaavard Skinnemoen 241965ebf33SHaavard Skinnemoen int detect_pin; 242965ebf33SHaavard Skinnemoen int wp_pin; 2431c1452beSJonas Larsson bool detect_is_active_high; 244965ebf33SHaavard Skinnemoen 245965ebf33SHaavard Skinnemoen struct timer_list detect_timer; 2467d2be074SHaavard Skinnemoen }; 2477d2be074SHaavard Skinnemoen 2487d2be074SHaavard Skinnemoen #define atmci_test_and_clear_pending(host, event) \ 2497d2be074SHaavard Skinnemoen test_and_clear_bit(event, &host->pending_events) 2507d2be074SHaavard Skinnemoen #define atmci_set_completed(host, event) \ 2517d2be074SHaavard Skinnemoen set_bit(event, &host->completed_events) 2527d2be074SHaavard Skinnemoen #define atmci_set_pending(host, event) \ 2537d2be074SHaavard Skinnemoen set_bit(event, &host->pending_events) 2547d2be074SHaavard Skinnemoen 255deec9ae3SHaavard Skinnemoen /* 256deec9ae3SHaavard Skinnemoen * The debugfs stuff below is mostly optimized away when 257deec9ae3SHaavard Skinnemoen * CONFIG_DEBUG_FS is not set. 258deec9ae3SHaavard Skinnemoen */ 259deec9ae3SHaavard Skinnemoen static int atmci_req_show(struct seq_file *s, void *v) 260deec9ae3SHaavard Skinnemoen { 261965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = s->private; 262965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 263deec9ae3SHaavard Skinnemoen struct mmc_command *cmd; 264deec9ae3SHaavard Skinnemoen struct mmc_command *stop; 265deec9ae3SHaavard Skinnemoen struct mmc_data *data; 266deec9ae3SHaavard Skinnemoen 267deec9ae3SHaavard Skinnemoen /* Make sure we get a consistent snapshot */ 268965ebf33SHaavard Skinnemoen spin_lock_bh(&slot->host->lock); 269965ebf33SHaavard Skinnemoen mrq = slot->mrq; 270deec9ae3SHaavard Skinnemoen 271deec9ae3SHaavard Skinnemoen if (mrq) { 272deec9ae3SHaavard Skinnemoen cmd = mrq->cmd; 273deec9ae3SHaavard Skinnemoen data = mrq->data; 274deec9ae3SHaavard Skinnemoen stop = mrq->stop; 275deec9ae3SHaavard Skinnemoen 276deec9ae3SHaavard Skinnemoen if (cmd) 277deec9ae3SHaavard Skinnemoen seq_printf(s, 278deec9ae3SHaavard Skinnemoen "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 279deec9ae3SHaavard Skinnemoen cmd->opcode, cmd->arg, cmd->flags, 280deec9ae3SHaavard Skinnemoen cmd->resp[0], cmd->resp[1], cmd->resp[2], 281d586ebbbSNicolas Ferre cmd->resp[3], cmd->error); 282deec9ae3SHaavard Skinnemoen if (data) 283deec9ae3SHaavard Skinnemoen seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", 284deec9ae3SHaavard Skinnemoen data->bytes_xfered, data->blocks, 285deec9ae3SHaavard Skinnemoen data->blksz, data->flags, data->error); 286deec9ae3SHaavard Skinnemoen if (stop) 287deec9ae3SHaavard Skinnemoen seq_printf(s, 288deec9ae3SHaavard Skinnemoen "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 289deec9ae3SHaavard Skinnemoen stop->opcode, stop->arg, stop->flags, 290deec9ae3SHaavard Skinnemoen stop->resp[0], stop->resp[1], stop->resp[2], 291d586ebbbSNicolas Ferre stop->resp[3], stop->error); 292deec9ae3SHaavard Skinnemoen } 293deec9ae3SHaavard Skinnemoen 294965ebf33SHaavard Skinnemoen spin_unlock_bh(&slot->host->lock); 295deec9ae3SHaavard Skinnemoen 296deec9ae3SHaavard Skinnemoen return 0; 297deec9ae3SHaavard Skinnemoen } 298deec9ae3SHaavard Skinnemoen 299deec9ae3SHaavard Skinnemoen static int atmci_req_open(struct inode *inode, struct file *file) 300deec9ae3SHaavard Skinnemoen { 301deec9ae3SHaavard Skinnemoen return single_open(file, atmci_req_show, inode->i_private); 302deec9ae3SHaavard Skinnemoen } 303deec9ae3SHaavard Skinnemoen 304deec9ae3SHaavard Skinnemoen static const struct file_operations atmci_req_fops = { 305deec9ae3SHaavard Skinnemoen .owner = THIS_MODULE, 306deec9ae3SHaavard Skinnemoen .open = atmci_req_open, 307deec9ae3SHaavard Skinnemoen .read = seq_read, 308deec9ae3SHaavard Skinnemoen .llseek = seq_lseek, 309deec9ae3SHaavard Skinnemoen .release = single_release, 310deec9ae3SHaavard Skinnemoen }; 311deec9ae3SHaavard Skinnemoen 312deec9ae3SHaavard Skinnemoen static void atmci_show_status_reg(struct seq_file *s, 313deec9ae3SHaavard Skinnemoen const char *regname, u32 value) 314deec9ae3SHaavard Skinnemoen { 315deec9ae3SHaavard Skinnemoen static const char *sr_bit[] = { 316deec9ae3SHaavard Skinnemoen [0] = "CMDRDY", 317deec9ae3SHaavard Skinnemoen [1] = "RXRDY", 318deec9ae3SHaavard Skinnemoen [2] = "TXRDY", 319deec9ae3SHaavard Skinnemoen [3] = "BLKE", 320deec9ae3SHaavard Skinnemoen [4] = "DTIP", 321deec9ae3SHaavard Skinnemoen [5] = "NOTBUSY", 32204d699c3SRob Emanuele [6] = "ENDRX", 32304d699c3SRob Emanuele [7] = "ENDTX", 324deec9ae3SHaavard Skinnemoen [8] = "SDIOIRQA", 325deec9ae3SHaavard Skinnemoen [9] = "SDIOIRQB", 32604d699c3SRob Emanuele [12] = "SDIOWAIT", 32704d699c3SRob Emanuele [14] = "RXBUFF", 32804d699c3SRob Emanuele [15] = "TXBUFE", 329deec9ae3SHaavard Skinnemoen [16] = "RINDE", 330deec9ae3SHaavard Skinnemoen [17] = "RDIRE", 331deec9ae3SHaavard Skinnemoen [18] = "RCRCE", 332deec9ae3SHaavard Skinnemoen [19] = "RENDE", 333deec9ae3SHaavard Skinnemoen [20] = "RTOE", 334deec9ae3SHaavard Skinnemoen [21] = "DCRCE", 335deec9ae3SHaavard Skinnemoen [22] = "DTOE", 33604d699c3SRob Emanuele [23] = "CSTOE", 33704d699c3SRob Emanuele [24] = "BLKOVRE", 33804d699c3SRob Emanuele [25] = "DMADONE", 33904d699c3SRob Emanuele [26] = "FIFOEMPTY", 34004d699c3SRob Emanuele [27] = "XFRDONE", 341deec9ae3SHaavard Skinnemoen [30] = "OVRE", 342deec9ae3SHaavard Skinnemoen [31] = "UNRE", 343deec9ae3SHaavard Skinnemoen }; 344deec9ae3SHaavard Skinnemoen unsigned int i; 345deec9ae3SHaavard Skinnemoen 346deec9ae3SHaavard Skinnemoen seq_printf(s, "%s:\t0x%08x", regname, value); 347deec9ae3SHaavard Skinnemoen for (i = 0; i < ARRAY_SIZE(sr_bit); i++) { 348deec9ae3SHaavard Skinnemoen if (value & (1 << i)) { 349deec9ae3SHaavard Skinnemoen if (sr_bit[i]) 350deec9ae3SHaavard Skinnemoen seq_printf(s, " %s", sr_bit[i]); 351deec9ae3SHaavard Skinnemoen else 352deec9ae3SHaavard Skinnemoen seq_puts(s, " UNKNOWN"); 353deec9ae3SHaavard Skinnemoen } 354deec9ae3SHaavard Skinnemoen } 355deec9ae3SHaavard Skinnemoen seq_putc(s, '\n'); 356deec9ae3SHaavard Skinnemoen } 357deec9ae3SHaavard Skinnemoen 358deec9ae3SHaavard Skinnemoen static int atmci_regs_show(struct seq_file *s, void *v) 359deec9ae3SHaavard Skinnemoen { 360deec9ae3SHaavard Skinnemoen struct atmel_mci *host = s->private; 361deec9ae3SHaavard Skinnemoen u32 *buf; 362deec9ae3SHaavard Skinnemoen 3632c96a293SLudovic Desroches buf = kmalloc(ATMCI_REGS_SIZE, GFP_KERNEL); 364deec9ae3SHaavard Skinnemoen if (!buf) 365deec9ae3SHaavard Skinnemoen return -ENOMEM; 366deec9ae3SHaavard Skinnemoen 367965ebf33SHaavard Skinnemoen /* 368965ebf33SHaavard Skinnemoen * Grab a more or less consistent snapshot. Note that we're 369965ebf33SHaavard Skinnemoen * not disabling interrupts, so IMR and SR may not be 370965ebf33SHaavard Skinnemoen * consistent. 371965ebf33SHaavard Skinnemoen */ 372965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 37387e60f2bSHaavard Skinnemoen clk_enable(host->mck); 3742c96a293SLudovic Desroches memcpy_fromio(buf, host->regs, ATMCI_REGS_SIZE); 37587e60f2bSHaavard Skinnemoen clk_disable(host->mck); 376965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 377deec9ae3SHaavard Skinnemoen 378deec9ae3SHaavard Skinnemoen seq_printf(s, "MR:\t0x%08x%s%s CLKDIV=%u\n", 3792c96a293SLudovic Desroches buf[ATMCI_MR / 4], 3802c96a293SLudovic Desroches buf[ATMCI_MR / 4] & ATMCI_MR_RDPROOF ? " RDPROOF" : "", 3812c96a293SLudovic Desroches buf[ATMCI_MR / 4] & ATMCI_MR_WRPROOF ? " WRPROOF" : "", 3822c96a293SLudovic Desroches buf[ATMCI_MR / 4] & 0xff); 3832c96a293SLudovic Desroches seq_printf(s, "DTOR:\t0x%08x\n", buf[ATMCI_DTOR / 4]); 3842c96a293SLudovic Desroches seq_printf(s, "SDCR:\t0x%08x\n", buf[ATMCI_SDCR / 4]); 3852c96a293SLudovic Desroches seq_printf(s, "ARGR:\t0x%08x\n", buf[ATMCI_ARGR / 4]); 386deec9ae3SHaavard Skinnemoen seq_printf(s, "BLKR:\t0x%08x BCNT=%u BLKLEN=%u\n", 3872c96a293SLudovic Desroches buf[ATMCI_BLKR / 4], 3882c96a293SLudovic Desroches buf[ATMCI_BLKR / 4] & 0xffff, 3892c96a293SLudovic Desroches (buf[ATMCI_BLKR / 4] >> 16) & 0xffff); 390796211b7SLudovic Desroches if (host->caps.has_cstor_reg) 3912c96a293SLudovic Desroches seq_printf(s, "CSTOR:\t0x%08x\n", buf[ATMCI_CSTOR / 4]); 392deec9ae3SHaavard Skinnemoen 393deec9ae3SHaavard Skinnemoen /* Don't read RSPR and RDR; it will consume the data there */ 394deec9ae3SHaavard Skinnemoen 3952c96a293SLudovic Desroches atmci_show_status_reg(s, "SR", buf[ATMCI_SR / 4]); 3962c96a293SLudovic Desroches atmci_show_status_reg(s, "IMR", buf[ATMCI_IMR / 4]); 397deec9ae3SHaavard Skinnemoen 398796211b7SLudovic Desroches if (host->caps.has_dma) { 39974791a2dSNicolas Ferre u32 val; 40074791a2dSNicolas Ferre 4012c96a293SLudovic Desroches val = buf[ATMCI_DMA / 4]; 40274791a2dSNicolas Ferre seq_printf(s, "DMA:\t0x%08x OFFSET=%u CHKSIZE=%u%s\n", 40374791a2dSNicolas Ferre val, val & 3, 40474791a2dSNicolas Ferre ((val >> 4) & 3) ? 40574791a2dSNicolas Ferre 1 << (((val >> 4) & 3) + 1) : 1, 4062c96a293SLudovic Desroches val & ATMCI_DMAEN ? " DMAEN" : ""); 407796211b7SLudovic Desroches } 408796211b7SLudovic Desroches if (host->caps.has_cfg_reg) { 409796211b7SLudovic Desroches u32 val; 41074791a2dSNicolas Ferre 4112c96a293SLudovic Desroches val = buf[ATMCI_CFG / 4]; 41274791a2dSNicolas Ferre seq_printf(s, "CFG:\t0x%08x%s%s%s%s\n", 41374791a2dSNicolas Ferre val, 4142c96a293SLudovic Desroches val & ATMCI_CFG_FIFOMODE_1DATA ? " FIFOMODE_ONE_DATA" : "", 4152c96a293SLudovic Desroches val & ATMCI_CFG_FERRCTRL_COR ? " FERRCTRL_CLEAR_ON_READ" : "", 4162c96a293SLudovic Desroches val & ATMCI_CFG_HSMODE ? " HSMODE" : "", 4172c96a293SLudovic Desroches val & ATMCI_CFG_LSYNC ? " LSYNC" : ""); 41874791a2dSNicolas Ferre } 41974791a2dSNicolas Ferre 420b17339a1SHaavard Skinnemoen kfree(buf); 421b17339a1SHaavard Skinnemoen 422deec9ae3SHaavard Skinnemoen return 0; 423deec9ae3SHaavard Skinnemoen } 424deec9ae3SHaavard Skinnemoen 425deec9ae3SHaavard Skinnemoen static int atmci_regs_open(struct inode *inode, struct file *file) 426deec9ae3SHaavard Skinnemoen { 427deec9ae3SHaavard Skinnemoen return single_open(file, atmci_regs_show, inode->i_private); 428deec9ae3SHaavard Skinnemoen } 429deec9ae3SHaavard Skinnemoen 430deec9ae3SHaavard Skinnemoen static const struct file_operations atmci_regs_fops = { 431deec9ae3SHaavard Skinnemoen .owner = THIS_MODULE, 432deec9ae3SHaavard Skinnemoen .open = atmci_regs_open, 433deec9ae3SHaavard Skinnemoen .read = seq_read, 434deec9ae3SHaavard Skinnemoen .llseek = seq_lseek, 435deec9ae3SHaavard Skinnemoen .release = single_release, 436deec9ae3SHaavard Skinnemoen }; 437deec9ae3SHaavard Skinnemoen 438965ebf33SHaavard Skinnemoen static void atmci_init_debugfs(struct atmel_mci_slot *slot) 439deec9ae3SHaavard Skinnemoen { 440965ebf33SHaavard Skinnemoen struct mmc_host *mmc = slot->mmc; 441965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 442deec9ae3SHaavard Skinnemoen struct dentry *root; 443deec9ae3SHaavard Skinnemoen struct dentry *node; 444deec9ae3SHaavard Skinnemoen 445deec9ae3SHaavard Skinnemoen root = mmc->debugfs_root; 446deec9ae3SHaavard Skinnemoen if (!root) 447deec9ae3SHaavard Skinnemoen return; 448deec9ae3SHaavard Skinnemoen 449deec9ae3SHaavard Skinnemoen node = debugfs_create_file("regs", S_IRUSR, root, host, 450deec9ae3SHaavard Skinnemoen &atmci_regs_fops); 451deec9ae3SHaavard Skinnemoen if (IS_ERR(node)) 452deec9ae3SHaavard Skinnemoen return; 453deec9ae3SHaavard Skinnemoen if (!node) 454deec9ae3SHaavard Skinnemoen goto err; 455deec9ae3SHaavard Skinnemoen 456965ebf33SHaavard Skinnemoen node = debugfs_create_file("req", S_IRUSR, root, slot, &atmci_req_fops); 457deec9ae3SHaavard Skinnemoen if (!node) 458deec9ae3SHaavard Skinnemoen goto err; 459deec9ae3SHaavard Skinnemoen 460c06ad258SHaavard Skinnemoen node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); 461c06ad258SHaavard Skinnemoen if (!node) 462c06ad258SHaavard Skinnemoen goto err; 463c06ad258SHaavard Skinnemoen 464deec9ae3SHaavard Skinnemoen node = debugfs_create_x32("pending_events", S_IRUSR, root, 465deec9ae3SHaavard Skinnemoen (u32 *)&host->pending_events); 466deec9ae3SHaavard Skinnemoen if (!node) 467deec9ae3SHaavard Skinnemoen goto err; 468deec9ae3SHaavard Skinnemoen 469deec9ae3SHaavard Skinnemoen node = debugfs_create_x32("completed_events", S_IRUSR, root, 470deec9ae3SHaavard Skinnemoen (u32 *)&host->completed_events); 471deec9ae3SHaavard Skinnemoen if (!node) 472deec9ae3SHaavard Skinnemoen goto err; 473deec9ae3SHaavard Skinnemoen 474deec9ae3SHaavard Skinnemoen return; 475deec9ae3SHaavard Skinnemoen 476deec9ae3SHaavard Skinnemoen err: 477965ebf33SHaavard Skinnemoen dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); 478deec9ae3SHaavard Skinnemoen } 4797d2be074SHaavard Skinnemoen 4802c96a293SLudovic Desroches static inline unsigned int atmci_ns_to_clocks(struct atmel_mci *host, 4817d2be074SHaavard Skinnemoen unsigned int ns) 4827d2be074SHaavard Skinnemoen { 4837d2be074SHaavard Skinnemoen return (ns * (host->bus_hz / 1000000) + 999) / 1000; 4847d2be074SHaavard Skinnemoen } 4857d2be074SHaavard Skinnemoen 4867d2be074SHaavard Skinnemoen static void atmci_set_timeout(struct atmel_mci *host, 487965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot, struct mmc_data *data) 4887d2be074SHaavard Skinnemoen { 4897d2be074SHaavard Skinnemoen static unsigned dtomul_to_shift[] = { 4907d2be074SHaavard Skinnemoen 0, 4, 7, 8, 10, 12, 16, 20 4917d2be074SHaavard Skinnemoen }; 4927d2be074SHaavard Skinnemoen unsigned timeout; 4937d2be074SHaavard Skinnemoen unsigned dtocyc; 4947d2be074SHaavard Skinnemoen unsigned dtomul; 4957d2be074SHaavard Skinnemoen 4962c96a293SLudovic Desroches timeout = atmci_ns_to_clocks(host, data->timeout_ns) 4972c96a293SLudovic Desroches + data->timeout_clks; 4987d2be074SHaavard Skinnemoen 4997d2be074SHaavard Skinnemoen for (dtomul = 0; dtomul < 8; dtomul++) { 5007d2be074SHaavard Skinnemoen unsigned shift = dtomul_to_shift[dtomul]; 5017d2be074SHaavard Skinnemoen dtocyc = (timeout + (1 << shift) - 1) >> shift; 5027d2be074SHaavard Skinnemoen if (dtocyc < 15) 5037d2be074SHaavard Skinnemoen break; 5047d2be074SHaavard Skinnemoen } 5057d2be074SHaavard Skinnemoen 5067d2be074SHaavard Skinnemoen if (dtomul >= 8) { 5077d2be074SHaavard Skinnemoen dtomul = 7; 5087d2be074SHaavard Skinnemoen dtocyc = 15; 5097d2be074SHaavard Skinnemoen } 5107d2be074SHaavard Skinnemoen 511965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "setting timeout to %u cycles\n", 5127d2be074SHaavard Skinnemoen dtocyc << dtomul_to_shift[dtomul]); 51303fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_DTOR, (ATMCI_DTOMUL(dtomul) | ATMCI_DTOCYC(dtocyc))); 5147d2be074SHaavard Skinnemoen } 5157d2be074SHaavard Skinnemoen 5167d2be074SHaavard Skinnemoen /* 5177d2be074SHaavard Skinnemoen * Return mask with command flags to be enabled for this command. 5187d2be074SHaavard Skinnemoen */ 5197d2be074SHaavard Skinnemoen static u32 atmci_prepare_command(struct mmc_host *mmc, 5207d2be074SHaavard Skinnemoen struct mmc_command *cmd) 5217d2be074SHaavard Skinnemoen { 5227d2be074SHaavard Skinnemoen struct mmc_data *data; 5237d2be074SHaavard Skinnemoen u32 cmdr; 5247d2be074SHaavard Skinnemoen 5257d2be074SHaavard Skinnemoen cmd->error = -EINPROGRESS; 5267d2be074SHaavard Skinnemoen 5272c96a293SLudovic Desroches cmdr = ATMCI_CMDR_CMDNB(cmd->opcode); 5287d2be074SHaavard Skinnemoen 5297d2be074SHaavard Skinnemoen if (cmd->flags & MMC_RSP_PRESENT) { 5307d2be074SHaavard Skinnemoen if (cmd->flags & MMC_RSP_136) 5312c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_RSPTYP_136BIT; 5327d2be074SHaavard Skinnemoen else 5332c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_RSPTYP_48BIT; 5347d2be074SHaavard Skinnemoen } 5357d2be074SHaavard Skinnemoen 5367d2be074SHaavard Skinnemoen /* 5377d2be074SHaavard Skinnemoen * This should really be MAXLAT_5 for CMD2 and ACMD41, but 5387d2be074SHaavard Skinnemoen * it's too difficult to determine whether this is an ACMD or 5397d2be074SHaavard Skinnemoen * not. Better make it 64. 5407d2be074SHaavard Skinnemoen */ 5412c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_MAXLAT_64CYC; 5427d2be074SHaavard Skinnemoen 5437d2be074SHaavard Skinnemoen if (mmc->ios.bus_mode == MMC_BUSMODE_OPENDRAIN) 5442c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_OPDCMD; 5457d2be074SHaavard Skinnemoen 5467d2be074SHaavard Skinnemoen data = cmd->data; 5477d2be074SHaavard Skinnemoen if (data) { 5482c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_START_XFER; 5492f1d7918SNicolas Ferre 5502f1d7918SNicolas Ferre if (cmd->opcode == SD_IO_RW_EXTENDED) { 5512c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_SDIO_BLOCK; 5522f1d7918SNicolas Ferre } else { 5537d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_STREAM) 5542c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_STREAM; 5557d2be074SHaavard Skinnemoen else if (data->blocks > 1) 5562c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_MULTI_BLOCK; 5577d2be074SHaavard Skinnemoen else 5582c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_BLOCK; 5592f1d7918SNicolas Ferre } 5607d2be074SHaavard Skinnemoen 5617d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 5622c96a293SLudovic Desroches cmdr |= ATMCI_CMDR_TRDIR_READ; 5637d2be074SHaavard Skinnemoen } 5647d2be074SHaavard Skinnemoen 5657d2be074SHaavard Skinnemoen return cmdr; 5667d2be074SHaavard Skinnemoen } 5677d2be074SHaavard Skinnemoen 56811d1488bSLudovic Desroches static void atmci_send_command(struct atmel_mci *host, 569965ebf33SHaavard Skinnemoen struct mmc_command *cmd, u32 cmd_flags) 5707d2be074SHaavard Skinnemoen { 5717d2be074SHaavard Skinnemoen WARN_ON(host->cmd); 5727d2be074SHaavard Skinnemoen host->cmd = cmd; 5737d2be074SHaavard Skinnemoen 574965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, 5757d2be074SHaavard Skinnemoen "start command: ARGR=0x%08x CMDR=0x%08x\n", 5767d2be074SHaavard Skinnemoen cmd->arg, cmd_flags); 5777d2be074SHaavard Skinnemoen 57803fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_ARGR, cmd->arg); 57903fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CMDR, cmd_flags); 5807d2be074SHaavard Skinnemoen } 5817d2be074SHaavard Skinnemoen 5822c96a293SLudovic Desroches static void atmci_send_stop_cmd(struct atmel_mci *host, struct mmc_data *data) 5837d2be074SHaavard Skinnemoen { 58411d1488bSLudovic Desroches atmci_send_command(host, data->stop, host->stop_cmdr); 58503fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_CMDRDY); 5867d2be074SHaavard Skinnemoen } 5877d2be074SHaavard Skinnemoen 588796211b7SLudovic Desroches /* 589796211b7SLudovic Desroches * Configure given PDC buffer taking care of alignement issues. 590796211b7SLudovic Desroches * Update host->data_size and host->sg. 591796211b7SLudovic Desroches */ 592796211b7SLudovic Desroches static void atmci_pdc_set_single_buf(struct atmel_mci *host, 593796211b7SLudovic Desroches enum atmci_xfer_dir dir, enum atmci_pdc_buf buf_nb) 594796211b7SLudovic Desroches { 595796211b7SLudovic Desroches u32 pointer_reg, counter_reg; 596796211b7SLudovic Desroches 597796211b7SLudovic Desroches if (dir == XFER_RECEIVE) { 598796211b7SLudovic Desroches pointer_reg = ATMEL_PDC_RPR; 599796211b7SLudovic Desroches counter_reg = ATMEL_PDC_RCR; 600796211b7SLudovic Desroches } else { 601796211b7SLudovic Desroches pointer_reg = ATMEL_PDC_TPR; 602796211b7SLudovic Desroches counter_reg = ATMEL_PDC_TCR; 603796211b7SLudovic Desroches } 604796211b7SLudovic Desroches 605796211b7SLudovic Desroches if (buf_nb == PDC_SECOND_BUF) { 6061ebbe3d3SLudovic Desroches pointer_reg += ATMEL_PDC_SCND_BUF_OFF; 6071ebbe3d3SLudovic Desroches counter_reg += ATMEL_PDC_SCND_BUF_OFF; 608796211b7SLudovic Desroches } 609796211b7SLudovic Desroches 610796211b7SLudovic Desroches atmci_writel(host, pointer_reg, sg_dma_address(host->sg)); 611341fa4c3SLudovic Desroches if (host->data_size <= sg_dma_len(host->sg)) { 612796211b7SLudovic Desroches if (host->data_size & 0x3) { 613796211b7SLudovic Desroches /* If size is different from modulo 4, transfer bytes */ 614796211b7SLudovic Desroches atmci_writel(host, counter_reg, host->data_size); 615796211b7SLudovic Desroches atmci_writel(host, ATMCI_MR, host->mode_reg | ATMCI_MR_PDCFBYTE); 616796211b7SLudovic Desroches } else { 617796211b7SLudovic Desroches /* Else transfer 32-bits words */ 618796211b7SLudovic Desroches atmci_writel(host, counter_reg, host->data_size / 4); 619796211b7SLudovic Desroches } 620796211b7SLudovic Desroches host->data_size = 0; 621796211b7SLudovic Desroches } else { 622796211b7SLudovic Desroches /* We assume the size of a page is 32-bits aligned */ 623341fa4c3SLudovic Desroches atmci_writel(host, counter_reg, sg_dma_len(host->sg) / 4); 624341fa4c3SLudovic Desroches host->data_size -= sg_dma_len(host->sg); 625796211b7SLudovic Desroches if (host->data_size) 626796211b7SLudovic Desroches host->sg = sg_next(host->sg); 627796211b7SLudovic Desroches } 628796211b7SLudovic Desroches } 629796211b7SLudovic Desroches 630796211b7SLudovic Desroches /* 631796211b7SLudovic Desroches * Configure PDC buffer according to the data size ie configuring one or two 632796211b7SLudovic Desroches * buffers. Don't use this function if you want to configure only the second 633796211b7SLudovic Desroches * buffer. In this case, use atmci_pdc_set_single_buf. 634796211b7SLudovic Desroches */ 635796211b7SLudovic Desroches static void atmci_pdc_set_both_buf(struct atmel_mci *host, int dir) 636796211b7SLudovic Desroches { 637796211b7SLudovic Desroches atmci_pdc_set_single_buf(host, dir, PDC_FIRST_BUF); 638796211b7SLudovic Desroches if (host->data_size) 639796211b7SLudovic Desroches atmci_pdc_set_single_buf(host, dir, PDC_SECOND_BUF); 640796211b7SLudovic Desroches } 641796211b7SLudovic Desroches 642796211b7SLudovic Desroches /* 643796211b7SLudovic Desroches * Unmap sg lists, called when transfer is finished. 644796211b7SLudovic Desroches */ 645796211b7SLudovic Desroches static void atmci_pdc_cleanup(struct atmel_mci *host) 646796211b7SLudovic Desroches { 647796211b7SLudovic Desroches struct mmc_data *data = host->data; 648796211b7SLudovic Desroches 649796211b7SLudovic Desroches if (data) 650796211b7SLudovic Desroches dma_unmap_sg(&host->pdev->dev, 651796211b7SLudovic Desroches data->sg, data->sg_len, 652796211b7SLudovic Desroches ((data->flags & MMC_DATA_WRITE) 653796211b7SLudovic Desroches ? DMA_TO_DEVICE : DMA_FROM_DEVICE)); 654796211b7SLudovic Desroches } 655796211b7SLudovic Desroches 656796211b7SLudovic Desroches /* 657796211b7SLudovic Desroches * Disable PDC transfers. Update pending flags to EVENT_XFER_COMPLETE after 658796211b7SLudovic Desroches * having received ATMCI_TXBUFE or ATMCI_RXBUFF interrupt. Enable ATMCI_NOTBUSY 659796211b7SLudovic Desroches * interrupt needed for both transfer directions. 660796211b7SLudovic Desroches */ 661796211b7SLudovic Desroches static void atmci_pdc_complete(struct atmel_mci *host) 662796211b7SLudovic Desroches { 663796211b7SLudovic Desroches atmci_writel(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTDIS | ATMEL_PDC_TXTDIS); 664796211b7SLudovic Desroches atmci_pdc_cleanup(host); 665796211b7SLudovic Desroches 666796211b7SLudovic Desroches /* 667796211b7SLudovic Desroches * If the card was removed, data will be NULL. No point trying 668796211b7SLudovic Desroches * to send the stop command or waiting for NBUSY in this case. 669796211b7SLudovic Desroches */ 670796211b7SLudovic Desroches if (host->data) { 671796211b7SLudovic Desroches atmci_set_pending(host, EVENT_XFER_COMPLETE); 672796211b7SLudovic Desroches tasklet_schedule(&host->tasklet); 673796211b7SLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_NOTBUSY); 674796211b7SLudovic Desroches } 675796211b7SLudovic Desroches } 676796211b7SLudovic Desroches 67765e8b083SHaavard Skinnemoen static void atmci_dma_cleanup(struct atmel_mci *host) 67865e8b083SHaavard Skinnemoen { 67965e8b083SHaavard Skinnemoen struct mmc_data *data = host->data; 68065e8b083SHaavard Skinnemoen 681009a891bSNicolas Ferre if (data) 682266ac3f2SLinus Walleij dma_unmap_sg(host->dma.chan->device->dev, 683266ac3f2SLinus Walleij data->sg, data->sg_len, 68465e8b083SHaavard Skinnemoen ((data->flags & MMC_DATA_WRITE) 68565e8b083SHaavard Skinnemoen ? DMA_TO_DEVICE : DMA_FROM_DEVICE)); 68665e8b083SHaavard Skinnemoen } 68765e8b083SHaavard Skinnemoen 688796211b7SLudovic Desroches /* 689796211b7SLudovic Desroches * This function is called by the DMA driver from tasklet context. 690796211b7SLudovic Desroches */ 69165e8b083SHaavard Skinnemoen static void atmci_dma_complete(void *arg) 69265e8b083SHaavard Skinnemoen { 69365e8b083SHaavard Skinnemoen struct atmel_mci *host = arg; 69465e8b083SHaavard Skinnemoen struct mmc_data *data = host->data; 69565e8b083SHaavard Skinnemoen 69665e8b083SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "DMA complete\n"); 69765e8b083SHaavard Skinnemoen 698796211b7SLudovic Desroches if (host->caps.has_dma) 69974791a2dSNicolas Ferre /* Disable DMA hardware handshaking on MCI */ 70003fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_DMA, atmci_readl(host, ATMCI_DMA) & ~ATMCI_DMAEN); 70174791a2dSNicolas Ferre 70265e8b083SHaavard Skinnemoen atmci_dma_cleanup(host); 70365e8b083SHaavard Skinnemoen 70465e8b083SHaavard Skinnemoen /* 70565e8b083SHaavard Skinnemoen * If the card was removed, data will be NULL. No point trying 70665e8b083SHaavard Skinnemoen * to send the stop command or waiting for NBUSY in this case. 70765e8b083SHaavard Skinnemoen */ 70865e8b083SHaavard Skinnemoen if (data) { 70965e8b083SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 71065e8b083SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 71165e8b083SHaavard Skinnemoen 71265e8b083SHaavard Skinnemoen /* 71365e8b083SHaavard Skinnemoen * Regardless of what the documentation says, we have 71465e8b083SHaavard Skinnemoen * to wait for NOTBUSY even after block read 71565e8b083SHaavard Skinnemoen * operations. 71665e8b083SHaavard Skinnemoen * 71765e8b083SHaavard Skinnemoen * When the DMA transfer is complete, the controller 71865e8b083SHaavard Skinnemoen * may still be reading the CRC from the card, i.e. 71965e8b083SHaavard Skinnemoen * the data transfer is still in progress and we 72065e8b083SHaavard Skinnemoen * haven't seen all the potential error bits yet. 72165e8b083SHaavard Skinnemoen * 72265e8b083SHaavard Skinnemoen * The interrupt handler will schedule a different 72365e8b083SHaavard Skinnemoen * tasklet to finish things up when the data transfer 72465e8b083SHaavard Skinnemoen * is completely done. 72565e8b083SHaavard Skinnemoen * 72665e8b083SHaavard Skinnemoen * We may not complete the mmc request here anyway 72765e8b083SHaavard Skinnemoen * because the mmc layer may call back and cause us to 72865e8b083SHaavard Skinnemoen * violate the "don't submit new operations from the 72965e8b083SHaavard Skinnemoen * completion callback" rule of the dma engine 73065e8b083SHaavard Skinnemoen * framework. 73165e8b083SHaavard Skinnemoen */ 73203fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_NOTBUSY); 73365e8b083SHaavard Skinnemoen } 73465e8b083SHaavard Skinnemoen } 73565e8b083SHaavard Skinnemoen 736796211b7SLudovic Desroches /* 737796211b7SLudovic Desroches * Returns a mask of interrupt flags to be enabled after the whole 738796211b7SLudovic Desroches * request has been prepared. 739796211b7SLudovic Desroches */ 740796211b7SLudovic Desroches static u32 atmci_prepare_data(struct atmel_mci *host, struct mmc_data *data) 741796211b7SLudovic Desroches { 742796211b7SLudovic Desroches u32 iflags; 743796211b7SLudovic Desroches 744796211b7SLudovic Desroches data->error = -EINPROGRESS; 745796211b7SLudovic Desroches 746796211b7SLudovic Desroches host->sg = data->sg; 747796211b7SLudovic Desroches host->data = data; 748796211b7SLudovic Desroches host->data_chan = NULL; 749796211b7SLudovic Desroches 750796211b7SLudovic Desroches iflags = ATMCI_DATA_ERROR_FLAGS; 751796211b7SLudovic Desroches 752796211b7SLudovic Desroches /* 753796211b7SLudovic Desroches * Errata: MMC data write operation with less than 12 754796211b7SLudovic Desroches * bytes is impossible. 755796211b7SLudovic Desroches * 756796211b7SLudovic Desroches * Errata: MCI Transmit Data Register (TDR) FIFO 757796211b7SLudovic Desroches * corruption when length is not multiple of 4. 758796211b7SLudovic Desroches */ 759796211b7SLudovic Desroches if (data->blocks * data->blksz < 12 760796211b7SLudovic Desroches || (data->blocks * data->blksz) & 3) 761796211b7SLudovic Desroches host->need_reset = true; 762796211b7SLudovic Desroches 763796211b7SLudovic Desroches host->pio_offset = 0; 764796211b7SLudovic Desroches if (data->flags & MMC_DATA_READ) 765796211b7SLudovic Desroches iflags |= ATMCI_RXRDY; 766796211b7SLudovic Desroches else 767796211b7SLudovic Desroches iflags |= ATMCI_TXRDY; 768796211b7SLudovic Desroches 769796211b7SLudovic Desroches return iflags; 770796211b7SLudovic Desroches } 771796211b7SLudovic Desroches 772796211b7SLudovic Desroches /* 773796211b7SLudovic Desroches * Set interrupt flags and set block length into the MCI mode register even 774796211b7SLudovic Desroches * if this value is also accessible in the MCI block register. It seems to be 775796211b7SLudovic Desroches * necessary before the High Speed MCI version. It also map sg and configure 776796211b7SLudovic Desroches * PDC registers. 777796211b7SLudovic Desroches */ 778796211b7SLudovic Desroches static u32 779796211b7SLudovic Desroches atmci_prepare_data_pdc(struct atmel_mci *host, struct mmc_data *data) 780796211b7SLudovic Desroches { 781796211b7SLudovic Desroches u32 iflags, tmp; 782796211b7SLudovic Desroches unsigned int sg_len; 783796211b7SLudovic Desroches enum dma_data_direction dir; 784796211b7SLudovic Desroches 785796211b7SLudovic Desroches data->error = -EINPROGRESS; 786796211b7SLudovic Desroches 787796211b7SLudovic Desroches host->data = data; 788796211b7SLudovic Desroches host->sg = data->sg; 789796211b7SLudovic Desroches iflags = ATMCI_DATA_ERROR_FLAGS; 790796211b7SLudovic Desroches 791796211b7SLudovic Desroches /* Enable pdc mode */ 792796211b7SLudovic Desroches atmci_writel(host, ATMCI_MR, host->mode_reg | ATMCI_MR_PDCMODE); 793796211b7SLudovic Desroches 794796211b7SLudovic Desroches if (data->flags & MMC_DATA_READ) { 795796211b7SLudovic Desroches dir = DMA_FROM_DEVICE; 796796211b7SLudovic Desroches iflags |= ATMCI_ENDRX | ATMCI_RXBUFF; 797796211b7SLudovic Desroches } else { 798796211b7SLudovic Desroches dir = DMA_TO_DEVICE; 799796211b7SLudovic Desroches iflags |= ATMCI_ENDTX | ATMCI_TXBUFE; 800796211b7SLudovic Desroches } 801796211b7SLudovic Desroches 802796211b7SLudovic Desroches /* Set BLKLEN */ 803796211b7SLudovic Desroches tmp = atmci_readl(host, ATMCI_MR); 804796211b7SLudovic Desroches tmp &= 0x0000ffff; 805796211b7SLudovic Desroches tmp |= ATMCI_BLKLEN(data->blksz); 806796211b7SLudovic Desroches atmci_writel(host, ATMCI_MR, tmp); 807796211b7SLudovic Desroches 808796211b7SLudovic Desroches /* Configure PDC */ 809796211b7SLudovic Desroches host->data_size = data->blocks * data->blksz; 810796211b7SLudovic Desroches sg_len = dma_map_sg(&host->pdev->dev, data->sg, data->sg_len, dir); 811796211b7SLudovic Desroches if (host->data_size) 812796211b7SLudovic Desroches atmci_pdc_set_both_buf(host, 813796211b7SLudovic Desroches ((dir == DMA_FROM_DEVICE) ? XFER_RECEIVE : XFER_TRANSMIT)); 814796211b7SLudovic Desroches 815796211b7SLudovic Desroches return iflags; 816796211b7SLudovic Desroches } 817796211b7SLudovic Desroches 818796211b7SLudovic Desroches static u32 81974791a2dSNicolas Ferre atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data) 82065e8b083SHaavard Skinnemoen { 82165e8b083SHaavard Skinnemoen struct dma_chan *chan; 82265e8b083SHaavard Skinnemoen struct dma_async_tx_descriptor *desc; 82365e8b083SHaavard Skinnemoen struct scatterlist *sg; 82465e8b083SHaavard Skinnemoen unsigned int i; 82565e8b083SHaavard Skinnemoen enum dma_data_direction direction; 826657a77faSAtsushi Nemoto unsigned int sglen; 827796211b7SLudovic Desroches u32 iflags; 828796211b7SLudovic Desroches 829796211b7SLudovic Desroches data->error = -EINPROGRESS; 830796211b7SLudovic Desroches 831796211b7SLudovic Desroches WARN_ON(host->data); 832796211b7SLudovic Desroches host->sg = NULL; 833796211b7SLudovic Desroches host->data = data; 834796211b7SLudovic Desroches 835796211b7SLudovic Desroches iflags = ATMCI_DATA_ERROR_FLAGS; 83665e8b083SHaavard Skinnemoen 83765e8b083SHaavard Skinnemoen /* 83865e8b083SHaavard Skinnemoen * We don't do DMA on "complex" transfers, i.e. with 83965e8b083SHaavard Skinnemoen * non-word-aligned buffers or lengths. Also, we don't bother 84065e8b083SHaavard Skinnemoen * with all the DMA setup overhead for short transfers. 84165e8b083SHaavard Skinnemoen */ 842796211b7SLudovic Desroches if (data->blocks * data->blksz < ATMCI_DMA_THRESHOLD) 843796211b7SLudovic Desroches return atmci_prepare_data(host, data); 84465e8b083SHaavard Skinnemoen if (data->blksz & 3) 845796211b7SLudovic Desroches return atmci_prepare_data(host, data); 84665e8b083SHaavard Skinnemoen 84765e8b083SHaavard Skinnemoen for_each_sg(data->sg, sg, data->sg_len, i) { 84865e8b083SHaavard Skinnemoen if (sg->offset & 3 || sg->length & 3) 849796211b7SLudovic Desroches return atmci_prepare_data(host, data); 85065e8b083SHaavard Skinnemoen } 85165e8b083SHaavard Skinnemoen 85265e8b083SHaavard Skinnemoen /* If we don't have a channel, we can't do DMA */ 85365e8b083SHaavard Skinnemoen chan = host->dma.chan; 8546f49a57aSDan Williams if (chan) 85565e8b083SHaavard Skinnemoen host->data_chan = chan; 85665e8b083SHaavard Skinnemoen 85765e8b083SHaavard Skinnemoen if (!chan) 85865e8b083SHaavard Skinnemoen return -ENODEV; 85965e8b083SHaavard Skinnemoen 860796211b7SLudovic Desroches if (host->caps.has_dma) 86103fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_DMA, ATMCI_DMA_CHKSIZE(3) | ATMCI_DMAEN); 86274791a2dSNicolas Ferre 86365e8b083SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 86465e8b083SHaavard Skinnemoen direction = DMA_FROM_DEVICE; 86565e8b083SHaavard Skinnemoen else 86665e8b083SHaavard Skinnemoen direction = DMA_TO_DEVICE; 86765e8b083SHaavard Skinnemoen 868266ac3f2SLinus Walleij sglen = dma_map_sg(chan->device->dev, data->sg, 869266ac3f2SLinus Walleij data->sg_len, direction); 87088ce4db3SLinus Walleij 87165e8b083SHaavard Skinnemoen desc = chan->device->device_prep_slave_sg(chan, 87288ce4db3SLinus Walleij data->sg, sglen, direction, 87365e8b083SHaavard Skinnemoen DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 87465e8b083SHaavard Skinnemoen if (!desc) 875657a77faSAtsushi Nemoto goto unmap_exit; 87665e8b083SHaavard Skinnemoen 87765e8b083SHaavard Skinnemoen host->dma.data_desc = desc; 87865e8b083SHaavard Skinnemoen desc->callback = atmci_dma_complete; 87965e8b083SHaavard Skinnemoen desc->callback_param = host; 88065e8b083SHaavard Skinnemoen 881796211b7SLudovic Desroches return iflags; 882657a77faSAtsushi Nemoto unmap_exit: 88388ce4db3SLinus Walleij dma_unmap_sg(chan->device->dev, data->sg, data->sg_len, direction); 884657a77faSAtsushi Nemoto return -ENOMEM; 88565e8b083SHaavard Skinnemoen } 88665e8b083SHaavard Skinnemoen 887796211b7SLudovic Desroches static void 888796211b7SLudovic Desroches atmci_submit_data(struct atmel_mci *host, struct mmc_data *data) 889796211b7SLudovic Desroches { 890796211b7SLudovic Desroches return; 891796211b7SLudovic Desroches } 892796211b7SLudovic Desroches 893796211b7SLudovic Desroches /* 894796211b7SLudovic Desroches * Start PDC according to transfer direction. 895796211b7SLudovic Desroches */ 896796211b7SLudovic Desroches static void 897796211b7SLudovic Desroches atmci_submit_data_pdc(struct atmel_mci *host, struct mmc_data *data) 898796211b7SLudovic Desroches { 899796211b7SLudovic Desroches if (data->flags & MMC_DATA_READ) 900796211b7SLudovic Desroches atmci_writel(host, ATMEL_PDC_PTCR, ATMEL_PDC_RXTEN); 901796211b7SLudovic Desroches else 902796211b7SLudovic Desroches atmci_writel(host, ATMEL_PDC_PTCR, ATMEL_PDC_TXTEN); 903796211b7SLudovic Desroches } 904796211b7SLudovic Desroches 905796211b7SLudovic Desroches static void 906796211b7SLudovic Desroches atmci_submit_data_dma(struct atmel_mci *host, struct mmc_data *data) 90774791a2dSNicolas Ferre { 90874791a2dSNicolas Ferre struct dma_chan *chan = host->data_chan; 90974791a2dSNicolas Ferre struct dma_async_tx_descriptor *desc = host->dma.data_desc; 91074791a2dSNicolas Ferre 91174791a2dSNicolas Ferre if (chan) { 9125328906aSLinus Walleij dmaengine_submit(desc); 9135328906aSLinus Walleij dma_async_issue_pending(chan); 91474791a2dSNicolas Ferre } 91574791a2dSNicolas Ferre } 91674791a2dSNicolas Ferre 917796211b7SLudovic Desroches static void atmci_stop_transfer(struct atmel_mci *host) 91865e8b083SHaavard Skinnemoen { 91965e8b083SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 92003fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_NOTBUSY); 92165e8b083SHaavard Skinnemoen } 92265e8b083SHaavard Skinnemoen 9237d2be074SHaavard Skinnemoen /* 924796211b7SLudovic Desroches * Stop data transfer because error(s) occured. 9257d2be074SHaavard Skinnemoen */ 926796211b7SLudovic Desroches static void atmci_stop_transfer_pdc(struct atmel_mci *host) 9277d2be074SHaavard Skinnemoen { 928796211b7SLudovic Desroches atmci_set_pending(host, EVENT_XFER_COMPLETE); 929796211b7SLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_NOTBUSY); 930796211b7SLudovic Desroches } 9317d2be074SHaavard Skinnemoen 932796211b7SLudovic Desroches static void atmci_stop_transfer_dma(struct atmel_mci *host) 933796211b7SLudovic Desroches { 934796211b7SLudovic Desroches struct dma_chan *chan = host->data_chan; 9357d2be074SHaavard Skinnemoen 936796211b7SLudovic Desroches if (chan) { 937796211b7SLudovic Desroches dmaengine_terminate_all(chan); 938796211b7SLudovic Desroches atmci_dma_cleanup(host); 939796211b7SLudovic Desroches } else { 940796211b7SLudovic Desroches /* Data transfer was stopped by the interrupt handler */ 941796211b7SLudovic Desroches atmci_set_pending(host, EVENT_XFER_COMPLETE); 942796211b7SLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_NOTBUSY); 943796211b7SLudovic Desroches } 944796211b7SLudovic Desroches } 945965ebf33SHaavard Skinnemoen 946965ebf33SHaavard Skinnemoen /* 947796211b7SLudovic Desroches * Start a request: prepare data if needed, prepare the command and activate 948796211b7SLudovic Desroches * interrupts. 949965ebf33SHaavard Skinnemoen */ 950965ebf33SHaavard Skinnemoen static void atmci_start_request(struct atmel_mci *host, 951965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot) 9527d2be074SHaavard Skinnemoen { 953965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 9547d2be074SHaavard Skinnemoen struct mmc_command *cmd; 955965ebf33SHaavard Skinnemoen struct mmc_data *data; 9567d2be074SHaavard Skinnemoen u32 iflags; 957965ebf33SHaavard Skinnemoen u32 cmdflags; 958965ebf33SHaavard Skinnemoen 959965ebf33SHaavard Skinnemoen mrq = slot->mrq; 960965ebf33SHaavard Skinnemoen host->cur_slot = slot; 961965ebf33SHaavard Skinnemoen host->mrq = mrq; 962965ebf33SHaavard Skinnemoen 963965ebf33SHaavard Skinnemoen host->pending_events = 0; 964965ebf33SHaavard Skinnemoen host->completed_events = 0; 965ca55f46eSHaavard Skinnemoen host->data_status = 0; 966965ebf33SHaavard Skinnemoen 967965ebf33SHaavard Skinnemoen if (host->need_reset) { 96803fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST); 96903fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIEN); 97003fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_MR, host->mode_reg); 971796211b7SLudovic Desroches if (host->caps.has_cfg_reg) 97203fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CFG, host->cfg_reg); 973965ebf33SHaavard Skinnemoen host->need_reset = false; 974965ebf33SHaavard Skinnemoen } 97503fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_SDCR, slot->sdc_reg); 9767d2be074SHaavard Skinnemoen 97703fc9a7fSLudovic Desroches iflags = atmci_readl(host, ATMCI_IMR); 9782c96a293SLudovic Desroches if (iflags & ~(ATMCI_SDIOIRQA | ATMCI_SDIOIRQB)) 979965ebf33SHaavard Skinnemoen dev_warn(&slot->mmc->class_dev, "WARNING: IMR=0x%08x\n", 980965ebf33SHaavard Skinnemoen iflags); 9817d2be074SHaavard Skinnemoen 982965ebf33SHaavard Skinnemoen if (unlikely(test_and_clear_bit(ATMCI_CARD_NEED_INIT, &slot->flags))) { 983965ebf33SHaavard Skinnemoen /* Send init sequence (74 clock cycles) */ 98403fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CMDR, ATMCI_CMDR_SPCMD_INIT); 98503fc9a7fSLudovic Desroches while (!(atmci_readl(host, ATMCI_SR) & ATMCI_CMDRDY)) 986965ebf33SHaavard Skinnemoen cpu_relax(); 9877d2be074SHaavard Skinnemoen } 98874791a2dSNicolas Ferre iflags = 0; 9897d2be074SHaavard Skinnemoen data = mrq->data; 9907d2be074SHaavard Skinnemoen if (data) { 991965ebf33SHaavard Skinnemoen atmci_set_timeout(host, slot, data); 992a252e3e3SHaavard Skinnemoen 993a252e3e3SHaavard Skinnemoen /* Must set block count/size before sending command */ 99403fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_BLKR, ATMCI_BCNT(data->blocks) 9952c96a293SLudovic Desroches | ATMCI_BLKLEN(data->blksz)); 996965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "BLKR=0x%08x\n", 9972c96a293SLudovic Desroches ATMCI_BCNT(data->blocks) | ATMCI_BLKLEN(data->blksz)); 99874791a2dSNicolas Ferre 999796211b7SLudovic Desroches iflags |= host->prepare_data(host, data); 10007d2be074SHaavard Skinnemoen } 10017d2be074SHaavard Skinnemoen 10022c96a293SLudovic Desroches iflags |= ATMCI_CMDRDY; 10037d2be074SHaavard Skinnemoen cmd = mrq->cmd; 1004965ebf33SHaavard Skinnemoen cmdflags = atmci_prepare_command(slot->mmc, cmd); 100511d1488bSLudovic Desroches atmci_send_command(host, cmd, cmdflags); 10067d2be074SHaavard Skinnemoen 10077d2be074SHaavard Skinnemoen if (data) 1008796211b7SLudovic Desroches host->submit_data(host, data); 10097d2be074SHaavard Skinnemoen 10107d2be074SHaavard Skinnemoen if (mrq->stop) { 1011965ebf33SHaavard Skinnemoen host->stop_cmdr = atmci_prepare_command(slot->mmc, mrq->stop); 10122c96a293SLudovic Desroches host->stop_cmdr |= ATMCI_CMDR_STOP_XFER; 10137d2be074SHaavard Skinnemoen if (!(data->flags & MMC_DATA_WRITE)) 10142c96a293SLudovic Desroches host->stop_cmdr |= ATMCI_CMDR_TRDIR_READ; 10157d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_STREAM) 10162c96a293SLudovic Desroches host->stop_cmdr |= ATMCI_CMDR_STREAM; 10177d2be074SHaavard Skinnemoen else 10182c96a293SLudovic Desroches host->stop_cmdr |= ATMCI_CMDR_MULTI_BLOCK; 10197d2be074SHaavard Skinnemoen } 10207d2be074SHaavard Skinnemoen 10217d2be074SHaavard Skinnemoen /* 10227d2be074SHaavard Skinnemoen * We could have enabled interrupts earlier, but I suspect 10237d2be074SHaavard Skinnemoen * that would open up a nice can of interesting race 10247d2be074SHaavard Skinnemoen * conditions (e.g. command and data complete, but stop not 10257d2be074SHaavard Skinnemoen * prepared yet.) 10267d2be074SHaavard Skinnemoen */ 102703fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IER, iflags); 1028965ebf33SHaavard Skinnemoen } 10297d2be074SHaavard Skinnemoen 1030965ebf33SHaavard Skinnemoen static void atmci_queue_request(struct atmel_mci *host, 1031965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot, struct mmc_request *mrq) 1032965ebf33SHaavard Skinnemoen { 1033965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", 1034965ebf33SHaavard Skinnemoen host->state); 1035965ebf33SHaavard Skinnemoen 1036965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 1037965ebf33SHaavard Skinnemoen slot->mrq = mrq; 1038965ebf33SHaavard Skinnemoen if (host->state == STATE_IDLE) { 1039965ebf33SHaavard Skinnemoen host->state = STATE_SENDING_CMD; 1040965ebf33SHaavard Skinnemoen atmci_start_request(host, slot); 1041965ebf33SHaavard Skinnemoen } else { 1042965ebf33SHaavard Skinnemoen list_add_tail(&slot->queue_node, &host->queue); 1043965ebf33SHaavard Skinnemoen } 1044965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 1045965ebf33SHaavard Skinnemoen } 1046965ebf33SHaavard Skinnemoen 1047965ebf33SHaavard Skinnemoen static void atmci_request(struct mmc_host *mmc, struct mmc_request *mrq) 1048965ebf33SHaavard Skinnemoen { 1049965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 1050965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 1051965ebf33SHaavard Skinnemoen struct mmc_data *data; 1052965ebf33SHaavard Skinnemoen 1053965ebf33SHaavard Skinnemoen WARN_ON(slot->mrq); 1054965ebf33SHaavard Skinnemoen 1055965ebf33SHaavard Skinnemoen /* 1056965ebf33SHaavard Skinnemoen * We may "know" the card is gone even though there's still an 1057965ebf33SHaavard Skinnemoen * electrical connection. If so, we really need to communicate 1058965ebf33SHaavard Skinnemoen * this to the MMC core since there won't be any more 1059965ebf33SHaavard Skinnemoen * interrupts as the card is completely removed. Otherwise, 1060965ebf33SHaavard Skinnemoen * the MMC core might believe the card is still there even 1061965ebf33SHaavard Skinnemoen * though the card was just removed very slowly. 1062965ebf33SHaavard Skinnemoen */ 1063965ebf33SHaavard Skinnemoen if (!test_bit(ATMCI_CARD_PRESENT, &slot->flags)) { 1064965ebf33SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 1065965ebf33SHaavard Skinnemoen mmc_request_done(mmc, mrq); 10667d2be074SHaavard Skinnemoen return; 1067965ebf33SHaavard Skinnemoen } 10687d2be074SHaavard Skinnemoen 1069965ebf33SHaavard Skinnemoen /* We don't support multiple blocks of weird lengths. */ 1070965ebf33SHaavard Skinnemoen data = mrq->data; 1071965ebf33SHaavard Skinnemoen if (data && data->blocks > 1 && data->blksz & 3) { 10727d2be074SHaavard Skinnemoen mrq->cmd->error = -EINVAL; 10737d2be074SHaavard Skinnemoen mmc_request_done(mmc, mrq); 10747d2be074SHaavard Skinnemoen } 10757d2be074SHaavard Skinnemoen 1076965ebf33SHaavard Skinnemoen atmci_queue_request(host, slot, mrq); 1077965ebf33SHaavard Skinnemoen } 1078965ebf33SHaavard Skinnemoen 10797d2be074SHaavard Skinnemoen static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 10807d2be074SHaavard Skinnemoen { 1081965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 1082965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 1083965ebf33SHaavard Skinnemoen unsigned int i; 10847d2be074SHaavard Skinnemoen 10852c96a293SLudovic Desroches slot->sdc_reg &= ~ATMCI_SDCBUS_MASK; 1086945533b5SHaavard Skinnemoen switch (ios->bus_width) { 1087945533b5SHaavard Skinnemoen case MMC_BUS_WIDTH_1: 10882c96a293SLudovic Desroches slot->sdc_reg |= ATMCI_SDCBUS_1BIT; 1089945533b5SHaavard Skinnemoen break; 1090945533b5SHaavard Skinnemoen case MMC_BUS_WIDTH_4: 10912c96a293SLudovic Desroches slot->sdc_reg |= ATMCI_SDCBUS_4BIT; 1092945533b5SHaavard Skinnemoen break; 1093945533b5SHaavard Skinnemoen } 1094945533b5SHaavard Skinnemoen 10957d2be074SHaavard Skinnemoen if (ios->clock) { 1096965ebf33SHaavard Skinnemoen unsigned int clock_min = ~0U; 10977d2be074SHaavard Skinnemoen u32 clkdiv; 10987d2be074SHaavard Skinnemoen 1099965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 1100965ebf33SHaavard Skinnemoen if (!host->mode_reg) { 1101945533b5SHaavard Skinnemoen clk_enable(host->mck); 110203fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST); 110303fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIEN); 1104796211b7SLudovic Desroches if (host->caps.has_cfg_reg) 110503fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CFG, host->cfg_reg); 1106965ebf33SHaavard Skinnemoen } 1107945533b5SHaavard Skinnemoen 1108965ebf33SHaavard Skinnemoen /* 1109965ebf33SHaavard Skinnemoen * Use mirror of ios->clock to prevent race with mmc 1110965ebf33SHaavard Skinnemoen * core ios update when finding the minimum. 1111965ebf33SHaavard Skinnemoen */ 1112965ebf33SHaavard Skinnemoen slot->clock = ios->clock; 11132c96a293SLudovic Desroches for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) { 1114965ebf33SHaavard Skinnemoen if (host->slot[i] && host->slot[i]->clock 1115965ebf33SHaavard Skinnemoen && host->slot[i]->clock < clock_min) 1116965ebf33SHaavard Skinnemoen clock_min = host->slot[i]->clock; 1117965ebf33SHaavard Skinnemoen } 1118965ebf33SHaavard Skinnemoen 1119965ebf33SHaavard Skinnemoen /* Calculate clock divider */ 1120965ebf33SHaavard Skinnemoen clkdiv = DIV_ROUND_UP(host->bus_hz, 2 * clock_min) - 1; 11217d2be074SHaavard Skinnemoen if (clkdiv > 255) { 11227d2be074SHaavard Skinnemoen dev_warn(&mmc->class_dev, 11237d2be074SHaavard Skinnemoen "clock %u too slow; using %lu\n", 1124965ebf33SHaavard Skinnemoen clock_min, host->bus_hz / (2 * 256)); 11257d2be074SHaavard Skinnemoen clkdiv = 255; 11267d2be074SHaavard Skinnemoen } 11277d2be074SHaavard Skinnemoen 11282c96a293SLudovic Desroches host->mode_reg = ATMCI_MR_CLKDIV(clkdiv); 112904d699c3SRob Emanuele 1130965ebf33SHaavard Skinnemoen /* 1131965ebf33SHaavard Skinnemoen * WRPROOF and RDPROOF prevent overruns/underruns by 1132965ebf33SHaavard Skinnemoen * stopping the clock when the FIFO is full/empty. 1133965ebf33SHaavard Skinnemoen * This state is not expected to last for long. 1134965ebf33SHaavard Skinnemoen */ 1135796211b7SLudovic Desroches if (host->caps.has_rwproof) 11362c96a293SLudovic Desroches host->mode_reg |= (ATMCI_MR_WRPROOF | ATMCI_MR_RDPROOF); 11377d2be074SHaavard Skinnemoen 1138796211b7SLudovic Desroches if (host->caps.has_cfg_reg) { 113999ddffd8SNicolas Ferre /* setup High Speed mode in relation with card capacity */ 114099ddffd8SNicolas Ferre if (ios->timing == MMC_TIMING_SD_HS) 11412c96a293SLudovic Desroches host->cfg_reg |= ATMCI_CFG_HSMODE; 1142965ebf33SHaavard Skinnemoen else 11432c96a293SLudovic Desroches host->cfg_reg &= ~ATMCI_CFG_HSMODE; 114499ddffd8SNicolas Ferre } 114599ddffd8SNicolas Ferre 114699ddffd8SNicolas Ferre if (list_empty(&host->queue)) { 114703fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_MR, host->mode_reg); 1148796211b7SLudovic Desroches if (host->caps.has_cfg_reg) 114903fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CFG, host->cfg_reg); 115099ddffd8SNicolas Ferre } else { 1151965ebf33SHaavard Skinnemoen host->need_clock_update = true; 115299ddffd8SNicolas Ferre } 1153965ebf33SHaavard Skinnemoen 1154965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 1155945533b5SHaavard Skinnemoen } else { 1156965ebf33SHaavard Skinnemoen bool any_slot_active = false; 1157965ebf33SHaavard Skinnemoen 1158965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 1159965ebf33SHaavard Skinnemoen slot->clock = 0; 11602c96a293SLudovic Desroches for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) { 1161965ebf33SHaavard Skinnemoen if (host->slot[i] && host->slot[i]->clock) { 1162965ebf33SHaavard Skinnemoen any_slot_active = true; 1163965ebf33SHaavard Skinnemoen break; 1164965ebf33SHaavard Skinnemoen } 1165965ebf33SHaavard Skinnemoen } 1166965ebf33SHaavard Skinnemoen if (!any_slot_active) { 116703fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIDIS); 1168945533b5SHaavard Skinnemoen if (host->mode_reg) { 116903fc9a7fSLudovic Desroches atmci_readl(host, ATMCI_MR); 1170945533b5SHaavard Skinnemoen clk_disable(host->mck); 1171945533b5SHaavard Skinnemoen } 1172945533b5SHaavard Skinnemoen host->mode_reg = 0; 11737d2be074SHaavard Skinnemoen } 1174965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 1175965ebf33SHaavard Skinnemoen } 11767d2be074SHaavard Skinnemoen 11777d2be074SHaavard Skinnemoen switch (ios->power_mode) { 1178965ebf33SHaavard Skinnemoen case MMC_POWER_UP: 1179965ebf33SHaavard Skinnemoen set_bit(ATMCI_CARD_NEED_INIT, &slot->flags); 1180965ebf33SHaavard Skinnemoen break; 11817d2be074SHaavard Skinnemoen default: 11827d2be074SHaavard Skinnemoen /* 11837d2be074SHaavard Skinnemoen * TODO: None of the currently available AVR32-based 11847d2be074SHaavard Skinnemoen * boards allow MMC power to be turned off. Implement 11857d2be074SHaavard Skinnemoen * power control when this can be tested properly. 1186965ebf33SHaavard Skinnemoen * 1187965ebf33SHaavard Skinnemoen * We also need to hook this into the clock management 1188965ebf33SHaavard Skinnemoen * somehow so that newly inserted cards aren't 1189965ebf33SHaavard Skinnemoen * subjected to a fast clock before we have a chance 1190965ebf33SHaavard Skinnemoen * to figure out what the maximum rate is. Currently, 1191965ebf33SHaavard Skinnemoen * there's no way to avoid this, and there never will 1192965ebf33SHaavard Skinnemoen * be for boards that don't support power control. 11937d2be074SHaavard Skinnemoen */ 11947d2be074SHaavard Skinnemoen break; 11957d2be074SHaavard Skinnemoen } 11967d2be074SHaavard Skinnemoen } 11977d2be074SHaavard Skinnemoen 11987d2be074SHaavard Skinnemoen static int atmci_get_ro(struct mmc_host *mmc) 11997d2be074SHaavard Skinnemoen { 1200965ebf33SHaavard Skinnemoen int read_only = -ENOSYS; 1201965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 12027d2be074SHaavard Skinnemoen 1203965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->wp_pin)) { 1204965ebf33SHaavard Skinnemoen read_only = gpio_get_value(slot->wp_pin); 12057d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "card is %s\n", 12067d2be074SHaavard Skinnemoen read_only ? "read-only" : "read-write"); 12077d2be074SHaavard Skinnemoen } 12087d2be074SHaavard Skinnemoen 12097d2be074SHaavard Skinnemoen return read_only; 12107d2be074SHaavard Skinnemoen } 12117d2be074SHaavard Skinnemoen 1212965ebf33SHaavard Skinnemoen static int atmci_get_cd(struct mmc_host *mmc) 1213965ebf33SHaavard Skinnemoen { 1214965ebf33SHaavard Skinnemoen int present = -ENOSYS; 1215965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 1216965ebf33SHaavard Skinnemoen 1217965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 12181c1452beSJonas Larsson present = !(gpio_get_value(slot->detect_pin) ^ 12191c1452beSJonas Larsson slot->detect_is_active_high); 1220965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "card is %spresent\n", 1221965ebf33SHaavard Skinnemoen present ? "" : "not "); 1222965ebf33SHaavard Skinnemoen } 1223965ebf33SHaavard Skinnemoen 1224965ebf33SHaavard Skinnemoen return present; 1225965ebf33SHaavard Skinnemoen } 1226965ebf33SHaavard Skinnemoen 122788ff82edSAnders Grahn static void atmci_enable_sdio_irq(struct mmc_host *mmc, int enable) 122888ff82edSAnders Grahn { 122988ff82edSAnders Grahn struct atmel_mci_slot *slot = mmc_priv(mmc); 123088ff82edSAnders Grahn struct atmel_mci *host = slot->host; 123188ff82edSAnders Grahn 123288ff82edSAnders Grahn if (enable) 123303fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IER, slot->sdio_irq); 123488ff82edSAnders Grahn else 123503fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, slot->sdio_irq); 123688ff82edSAnders Grahn } 123788ff82edSAnders Grahn 1238965ebf33SHaavard Skinnemoen static const struct mmc_host_ops atmci_ops = { 12397d2be074SHaavard Skinnemoen .request = atmci_request, 12407d2be074SHaavard Skinnemoen .set_ios = atmci_set_ios, 12417d2be074SHaavard Skinnemoen .get_ro = atmci_get_ro, 1242965ebf33SHaavard Skinnemoen .get_cd = atmci_get_cd, 124388ff82edSAnders Grahn .enable_sdio_irq = atmci_enable_sdio_irq, 12447d2be074SHaavard Skinnemoen }; 12457d2be074SHaavard Skinnemoen 1246965ebf33SHaavard Skinnemoen /* Called with host->lock held */ 1247965ebf33SHaavard Skinnemoen static void atmci_request_end(struct atmel_mci *host, struct mmc_request *mrq) 1248965ebf33SHaavard Skinnemoen __releases(&host->lock) 1249965ebf33SHaavard Skinnemoen __acquires(&host->lock) 1250965ebf33SHaavard Skinnemoen { 1251965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = NULL; 1252965ebf33SHaavard Skinnemoen struct mmc_host *prev_mmc = host->cur_slot->mmc; 1253965ebf33SHaavard Skinnemoen 1254965ebf33SHaavard Skinnemoen WARN_ON(host->cmd || host->data); 1255965ebf33SHaavard Skinnemoen 1256965ebf33SHaavard Skinnemoen /* 1257965ebf33SHaavard Skinnemoen * Update the MMC clock rate if necessary. This may be 1258965ebf33SHaavard Skinnemoen * necessary if set_ios() is called when a different slot is 125925985edcSLucas De Marchi * busy transferring data. 1260965ebf33SHaavard Skinnemoen */ 126199ddffd8SNicolas Ferre if (host->need_clock_update) { 126203fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_MR, host->mode_reg); 1263796211b7SLudovic Desroches if (host->caps.has_cfg_reg) 126403fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CFG, host->cfg_reg); 126599ddffd8SNicolas Ferre } 1266965ebf33SHaavard Skinnemoen 1267965ebf33SHaavard Skinnemoen host->cur_slot->mrq = NULL; 1268965ebf33SHaavard Skinnemoen host->mrq = NULL; 1269965ebf33SHaavard Skinnemoen if (!list_empty(&host->queue)) { 1270965ebf33SHaavard Skinnemoen slot = list_entry(host->queue.next, 1271965ebf33SHaavard Skinnemoen struct atmel_mci_slot, queue_node); 1272965ebf33SHaavard Skinnemoen list_del(&slot->queue_node); 1273965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "list not empty: %s is next\n", 1274965ebf33SHaavard Skinnemoen mmc_hostname(slot->mmc)); 1275965ebf33SHaavard Skinnemoen host->state = STATE_SENDING_CMD; 1276965ebf33SHaavard Skinnemoen atmci_start_request(host, slot); 1277965ebf33SHaavard Skinnemoen } else { 1278965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "list empty\n"); 1279965ebf33SHaavard Skinnemoen host->state = STATE_IDLE; 1280965ebf33SHaavard Skinnemoen } 1281965ebf33SHaavard Skinnemoen 1282965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 1283965ebf33SHaavard Skinnemoen mmc_request_done(prev_mmc, mrq); 1284965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1285965ebf33SHaavard Skinnemoen } 1286965ebf33SHaavard Skinnemoen 12877d2be074SHaavard Skinnemoen static void atmci_command_complete(struct atmel_mci *host, 1288c06ad258SHaavard Skinnemoen struct mmc_command *cmd) 12897d2be074SHaavard Skinnemoen { 1290c06ad258SHaavard Skinnemoen u32 status = host->cmd_status; 1291c06ad258SHaavard Skinnemoen 12927d2be074SHaavard Skinnemoen /* Read the response from the card (up to 16 bytes) */ 129303fc9a7fSLudovic Desroches cmd->resp[0] = atmci_readl(host, ATMCI_RSPR); 129403fc9a7fSLudovic Desroches cmd->resp[1] = atmci_readl(host, ATMCI_RSPR); 129503fc9a7fSLudovic Desroches cmd->resp[2] = atmci_readl(host, ATMCI_RSPR); 129603fc9a7fSLudovic Desroches cmd->resp[3] = atmci_readl(host, ATMCI_RSPR); 12977d2be074SHaavard Skinnemoen 12982c96a293SLudovic Desroches if (status & ATMCI_RTOE) 12997d2be074SHaavard Skinnemoen cmd->error = -ETIMEDOUT; 13002c96a293SLudovic Desroches else if ((cmd->flags & MMC_RSP_CRC) && (status & ATMCI_RCRCE)) 13017d2be074SHaavard Skinnemoen cmd->error = -EILSEQ; 13022c96a293SLudovic Desroches else if (status & (ATMCI_RINDE | ATMCI_RDIRE | ATMCI_RENDE)) 13037d2be074SHaavard Skinnemoen cmd->error = -EIO; 13047d2be074SHaavard Skinnemoen else 13057d2be074SHaavard Skinnemoen cmd->error = 0; 13067d2be074SHaavard Skinnemoen 13077d2be074SHaavard Skinnemoen if (cmd->error) { 1308965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 13097d2be074SHaavard Skinnemoen "command error: status=0x%08x\n", status); 13107d2be074SHaavard Skinnemoen 13117d2be074SHaavard Skinnemoen if (cmd->data) { 1312796211b7SLudovic Desroches host->stop_transfer(host); 1313009a891bSNicolas Ferre host->data = NULL; 131403fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_NOTBUSY 13152c96a293SLudovic Desroches | ATMCI_TXRDY | ATMCI_RXRDY 13167d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS); 13177d2be074SHaavard Skinnemoen } 13187d2be074SHaavard Skinnemoen } 13197d2be074SHaavard Skinnemoen } 13207d2be074SHaavard Skinnemoen 13217d2be074SHaavard Skinnemoen static void atmci_detect_change(unsigned long data) 13227d2be074SHaavard Skinnemoen { 1323965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = (struct atmel_mci_slot *)data; 1324965ebf33SHaavard Skinnemoen bool present; 1325965ebf33SHaavard Skinnemoen bool present_old; 13267d2be074SHaavard Skinnemoen 13277d2be074SHaavard Skinnemoen /* 1328965ebf33SHaavard Skinnemoen * atmci_cleanup_slot() sets the ATMCI_SHUTDOWN flag before 1329965ebf33SHaavard Skinnemoen * freeing the interrupt. We must not re-enable the interrupt 1330965ebf33SHaavard Skinnemoen * if it has been freed, and if we're shutting down, it 1331965ebf33SHaavard Skinnemoen * doesn't really matter whether the card is present or not. 13327d2be074SHaavard Skinnemoen */ 13337d2be074SHaavard Skinnemoen smp_rmb(); 1334965ebf33SHaavard Skinnemoen if (test_bit(ATMCI_SHUTDOWN, &slot->flags)) 13357d2be074SHaavard Skinnemoen return; 13367d2be074SHaavard Skinnemoen 1337965ebf33SHaavard Skinnemoen enable_irq(gpio_to_irq(slot->detect_pin)); 13381c1452beSJonas Larsson present = !(gpio_get_value(slot->detect_pin) ^ 13391c1452beSJonas Larsson slot->detect_is_active_high); 1340965ebf33SHaavard Skinnemoen present_old = test_bit(ATMCI_CARD_PRESENT, &slot->flags); 13417d2be074SHaavard Skinnemoen 1342965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "detect change: %d (was %d)\n", 1343965ebf33SHaavard Skinnemoen present, present_old); 13447d2be074SHaavard Skinnemoen 1345965ebf33SHaavard Skinnemoen if (present != present_old) { 1346965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 1347965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 1348965ebf33SHaavard Skinnemoen 1349965ebf33SHaavard Skinnemoen dev_dbg(&slot->mmc->class_dev, "card %s\n", 13507d2be074SHaavard Skinnemoen present ? "inserted" : "removed"); 13517d2be074SHaavard Skinnemoen 1352965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1353965ebf33SHaavard Skinnemoen 1354965ebf33SHaavard Skinnemoen if (!present) 1355965ebf33SHaavard Skinnemoen clear_bit(ATMCI_CARD_PRESENT, &slot->flags); 1356965ebf33SHaavard Skinnemoen else 1357965ebf33SHaavard Skinnemoen set_bit(ATMCI_CARD_PRESENT, &slot->flags); 13587d2be074SHaavard Skinnemoen 13597d2be074SHaavard Skinnemoen /* Clean up queue if present */ 1360965ebf33SHaavard Skinnemoen mrq = slot->mrq; 13617d2be074SHaavard Skinnemoen if (mrq) { 1362965ebf33SHaavard Skinnemoen if (mrq == host->mrq) { 13637d2be074SHaavard Skinnemoen /* 13647d2be074SHaavard Skinnemoen * Reset controller to terminate any ongoing 13657d2be074SHaavard Skinnemoen * commands or data transfers. 13667d2be074SHaavard Skinnemoen */ 136703fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST); 136803fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIEN); 136903fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_MR, host->mode_reg); 1370796211b7SLudovic Desroches if (host->caps.has_cfg_reg) 137103fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CFG, host->cfg_reg); 13727d2be074SHaavard Skinnemoen 13737d2be074SHaavard Skinnemoen host->data = NULL; 13747d2be074SHaavard Skinnemoen host->cmd = NULL; 1375c06ad258SHaavard Skinnemoen 1376c06ad258SHaavard Skinnemoen switch (host->state) { 1377965ebf33SHaavard Skinnemoen case STATE_IDLE: 1378965ebf33SHaavard Skinnemoen break; 1379c06ad258SHaavard Skinnemoen case STATE_SENDING_CMD: 1380c06ad258SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 1381c06ad258SHaavard Skinnemoen if (!mrq->data) 1382c06ad258SHaavard Skinnemoen break; 1383c06ad258SHaavard Skinnemoen /* fall through */ 1384c06ad258SHaavard Skinnemoen case STATE_SENDING_DATA: 1385c06ad258SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 1386796211b7SLudovic Desroches host->stop_transfer(host); 1387c06ad258SHaavard Skinnemoen break; 1388c06ad258SHaavard Skinnemoen case STATE_DATA_BUSY: 1389c06ad258SHaavard Skinnemoen case STATE_DATA_ERROR: 1390c06ad258SHaavard Skinnemoen if (mrq->data->error == -EINPROGRESS) 1391c06ad258SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 1392c06ad258SHaavard Skinnemoen if (!mrq->stop) 1393c06ad258SHaavard Skinnemoen break; 1394c06ad258SHaavard Skinnemoen /* fall through */ 1395c06ad258SHaavard Skinnemoen case STATE_SENDING_STOP: 1396c06ad258SHaavard Skinnemoen mrq->stop->error = -ENOMEDIUM; 1397c06ad258SHaavard Skinnemoen break; 1398c06ad258SHaavard Skinnemoen } 1399c06ad258SHaavard Skinnemoen 1400965ebf33SHaavard Skinnemoen atmci_request_end(host, mrq); 1401965ebf33SHaavard Skinnemoen } else { 1402965ebf33SHaavard Skinnemoen list_del(&slot->queue_node); 1403965ebf33SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 1404965ebf33SHaavard Skinnemoen if (mrq->data) 1405965ebf33SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 1406965ebf33SHaavard Skinnemoen if (mrq->stop) 1407965ebf33SHaavard Skinnemoen mrq->stop->error = -ENOMEDIUM; 14087d2be074SHaavard Skinnemoen 1409965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 1410965ebf33SHaavard Skinnemoen mmc_request_done(slot->mmc, mrq); 1411965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1412965ebf33SHaavard Skinnemoen } 1413965ebf33SHaavard Skinnemoen } 1414965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 1415965ebf33SHaavard Skinnemoen 1416965ebf33SHaavard Skinnemoen mmc_detect_change(slot->mmc, 0); 14177d2be074SHaavard Skinnemoen } 14187d2be074SHaavard Skinnemoen } 14197d2be074SHaavard Skinnemoen 14207d2be074SHaavard Skinnemoen static void atmci_tasklet_func(unsigned long priv) 14217d2be074SHaavard Skinnemoen { 1422965ebf33SHaavard Skinnemoen struct atmel_mci *host = (struct atmel_mci *)priv; 14237d2be074SHaavard Skinnemoen struct mmc_request *mrq = host->mrq; 14247d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 1425c06ad258SHaavard Skinnemoen struct mmc_command *cmd = host->cmd; 1426c06ad258SHaavard Skinnemoen enum atmel_mci_state state = host->state; 1427c06ad258SHaavard Skinnemoen enum atmel_mci_state prev_state; 1428c06ad258SHaavard Skinnemoen u32 status; 1429c06ad258SHaavard Skinnemoen 1430965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1431965ebf33SHaavard Skinnemoen 1432c06ad258SHaavard Skinnemoen state = host->state; 14337d2be074SHaavard Skinnemoen 1434965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, 1435c06ad258SHaavard Skinnemoen "tasklet: state %u pending/completed/mask %lx/%lx/%x\n", 1436c06ad258SHaavard Skinnemoen state, host->pending_events, host->completed_events, 143703fc9a7fSLudovic Desroches atmci_readl(host, ATMCI_IMR)); 14387d2be074SHaavard Skinnemoen 1439c06ad258SHaavard Skinnemoen do { 1440c06ad258SHaavard Skinnemoen prev_state = state; 1441c06ad258SHaavard Skinnemoen 1442c06ad258SHaavard Skinnemoen switch (state) { 1443965ebf33SHaavard Skinnemoen case STATE_IDLE: 1444965ebf33SHaavard Skinnemoen break; 1445965ebf33SHaavard Skinnemoen 1446c06ad258SHaavard Skinnemoen case STATE_SENDING_CMD: 1447c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1448c06ad258SHaavard Skinnemoen EVENT_CMD_COMPLETE)) 1449c06ad258SHaavard Skinnemoen break; 1450c06ad258SHaavard Skinnemoen 14517d2be074SHaavard Skinnemoen host->cmd = NULL; 14527d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_CMD_COMPLETE); 1453c06ad258SHaavard Skinnemoen atmci_command_complete(host, mrq->cmd); 1454c06ad258SHaavard Skinnemoen if (!mrq->data || cmd->error) { 1455965ebf33SHaavard Skinnemoen atmci_request_end(host, host->mrq); 1456965ebf33SHaavard Skinnemoen goto unlock; 14577d2be074SHaavard Skinnemoen } 1458c06ad258SHaavard Skinnemoen 1459c06ad258SHaavard Skinnemoen prev_state = state = STATE_SENDING_DATA; 1460c06ad258SHaavard Skinnemoen /* fall through */ 1461c06ad258SHaavard Skinnemoen 1462c06ad258SHaavard Skinnemoen case STATE_SENDING_DATA: 1463c06ad258SHaavard Skinnemoen if (atmci_test_and_clear_pending(host, 1464c06ad258SHaavard Skinnemoen EVENT_DATA_ERROR)) { 1465796211b7SLudovic Desroches host->stop_transfer(host); 1466c06ad258SHaavard Skinnemoen if (data->stop) 14672c96a293SLudovic Desroches atmci_send_stop_cmd(host, data); 1468c06ad258SHaavard Skinnemoen state = STATE_DATA_ERROR; 1469c06ad258SHaavard Skinnemoen break; 14707d2be074SHaavard Skinnemoen } 14717d2be074SHaavard Skinnemoen 1472c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1473c06ad258SHaavard Skinnemoen EVENT_XFER_COMPLETE)) 1474c06ad258SHaavard Skinnemoen break; 14757d2be074SHaavard Skinnemoen 1476c06ad258SHaavard Skinnemoen atmci_set_completed(host, EVENT_XFER_COMPLETE); 1477c06ad258SHaavard Skinnemoen prev_state = state = STATE_DATA_BUSY; 1478c06ad258SHaavard Skinnemoen /* fall through */ 1479c06ad258SHaavard Skinnemoen 1480c06ad258SHaavard Skinnemoen case STATE_DATA_BUSY: 1481c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1482c06ad258SHaavard Skinnemoen EVENT_DATA_COMPLETE)) 1483c06ad258SHaavard Skinnemoen break; 1484c06ad258SHaavard Skinnemoen 1485c06ad258SHaavard Skinnemoen host->data = NULL; 14867d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_DATA_COMPLETE); 1487c06ad258SHaavard Skinnemoen status = host->data_status; 1488c06ad258SHaavard Skinnemoen if (unlikely(status & ATMCI_DATA_ERROR_FLAGS)) { 14892c96a293SLudovic Desroches if (status & ATMCI_DTOE) { 1490965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 14917d2be074SHaavard Skinnemoen "data timeout error\n"); 14927d2be074SHaavard Skinnemoen data->error = -ETIMEDOUT; 14932c96a293SLudovic Desroches } else if (status & ATMCI_DCRCE) { 1494965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 1495c06ad258SHaavard Skinnemoen "data CRC error\n"); 14967d2be074SHaavard Skinnemoen data->error = -EILSEQ; 14977d2be074SHaavard Skinnemoen } else { 1498965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 14997d2be074SHaavard Skinnemoen "data FIFO error (status=%08x)\n", 15007d2be074SHaavard Skinnemoen status); 15017d2be074SHaavard Skinnemoen data->error = -EIO; 15027d2be074SHaavard Skinnemoen } 1503c06ad258SHaavard Skinnemoen } else { 15047d2be074SHaavard Skinnemoen data->bytes_xfered = data->blocks * data->blksz; 15057d2be074SHaavard Skinnemoen data->error = 0; 150603fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_DATA_ERROR_FLAGS); 15077d2be074SHaavard Skinnemoen } 15087d2be074SHaavard Skinnemoen 1509c06ad258SHaavard Skinnemoen if (!data->stop) { 1510965ebf33SHaavard Skinnemoen atmci_request_end(host, host->mrq); 1511965ebf33SHaavard Skinnemoen goto unlock; 15127d2be074SHaavard Skinnemoen } 15137d2be074SHaavard Skinnemoen 1514c06ad258SHaavard Skinnemoen prev_state = state = STATE_SENDING_STOP; 1515c06ad258SHaavard Skinnemoen if (!data->error) 15162c96a293SLudovic Desroches atmci_send_stop_cmd(host, data); 1517c06ad258SHaavard Skinnemoen /* fall through */ 1518c06ad258SHaavard Skinnemoen 1519c06ad258SHaavard Skinnemoen case STATE_SENDING_STOP: 1520c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1521c06ad258SHaavard Skinnemoen EVENT_CMD_COMPLETE)) 1522c06ad258SHaavard Skinnemoen break; 1523c06ad258SHaavard Skinnemoen 1524c06ad258SHaavard Skinnemoen host->cmd = NULL; 1525c06ad258SHaavard Skinnemoen atmci_command_complete(host, mrq->stop); 1526965ebf33SHaavard Skinnemoen atmci_request_end(host, host->mrq); 1527965ebf33SHaavard Skinnemoen goto unlock; 1528c06ad258SHaavard Skinnemoen 1529c06ad258SHaavard Skinnemoen case STATE_DATA_ERROR: 1530c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1531c06ad258SHaavard Skinnemoen EVENT_XFER_COMPLETE)) 1532c06ad258SHaavard Skinnemoen break; 1533c06ad258SHaavard Skinnemoen 1534c06ad258SHaavard Skinnemoen state = STATE_DATA_BUSY; 1535c06ad258SHaavard Skinnemoen break; 1536c06ad258SHaavard Skinnemoen } 1537c06ad258SHaavard Skinnemoen } while (state != prev_state); 1538c06ad258SHaavard Skinnemoen 1539c06ad258SHaavard Skinnemoen host->state = state; 1540965ebf33SHaavard Skinnemoen 1541965ebf33SHaavard Skinnemoen unlock: 1542965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 15437d2be074SHaavard Skinnemoen } 15447d2be074SHaavard Skinnemoen 15457d2be074SHaavard Skinnemoen static void atmci_read_data_pio(struct atmel_mci *host) 15467d2be074SHaavard Skinnemoen { 15477d2be074SHaavard Skinnemoen struct scatterlist *sg = host->sg; 15487d2be074SHaavard Skinnemoen void *buf = sg_virt(sg); 15497d2be074SHaavard Skinnemoen unsigned int offset = host->pio_offset; 15507d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 15517d2be074SHaavard Skinnemoen u32 value; 15527d2be074SHaavard Skinnemoen u32 status; 15537d2be074SHaavard Skinnemoen unsigned int nbytes = 0; 15547d2be074SHaavard Skinnemoen 15557d2be074SHaavard Skinnemoen do { 155603fc9a7fSLudovic Desroches value = atmci_readl(host, ATMCI_RDR); 15577d2be074SHaavard Skinnemoen if (likely(offset + 4 <= sg->length)) { 15587d2be074SHaavard Skinnemoen put_unaligned(value, (u32 *)(buf + offset)); 15597d2be074SHaavard Skinnemoen 15607d2be074SHaavard Skinnemoen offset += 4; 15617d2be074SHaavard Skinnemoen nbytes += 4; 15627d2be074SHaavard Skinnemoen 15637d2be074SHaavard Skinnemoen if (offset == sg->length) { 15645e7184aeSHaavard Skinnemoen flush_dcache_page(sg_page(sg)); 15657d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 15667d2be074SHaavard Skinnemoen if (!sg) 15677d2be074SHaavard Skinnemoen goto done; 15687d2be074SHaavard Skinnemoen 15697d2be074SHaavard Skinnemoen offset = 0; 15707d2be074SHaavard Skinnemoen buf = sg_virt(sg); 15717d2be074SHaavard Skinnemoen } 15727d2be074SHaavard Skinnemoen } else { 15737d2be074SHaavard Skinnemoen unsigned int remaining = sg->length - offset; 15747d2be074SHaavard Skinnemoen memcpy(buf + offset, &value, remaining); 15757d2be074SHaavard Skinnemoen nbytes += remaining; 15767d2be074SHaavard Skinnemoen 15777d2be074SHaavard Skinnemoen flush_dcache_page(sg_page(sg)); 15787d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 15797d2be074SHaavard Skinnemoen if (!sg) 15807d2be074SHaavard Skinnemoen goto done; 15817d2be074SHaavard Skinnemoen 15827d2be074SHaavard Skinnemoen offset = 4 - remaining; 15837d2be074SHaavard Skinnemoen buf = sg_virt(sg); 15847d2be074SHaavard Skinnemoen memcpy(buf, (u8 *)&value + remaining, offset); 15857d2be074SHaavard Skinnemoen nbytes += offset; 15867d2be074SHaavard Skinnemoen } 15877d2be074SHaavard Skinnemoen 158803fc9a7fSLudovic Desroches status = atmci_readl(host, ATMCI_SR); 15897d2be074SHaavard Skinnemoen if (status & ATMCI_DATA_ERROR_FLAGS) { 159003fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, (ATMCI_NOTBUSY | ATMCI_RXRDY 15917d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS)); 15927d2be074SHaavard Skinnemoen host->data_status = status; 1593965ebf33SHaavard Skinnemoen data->bytes_xfered += nbytes; 1594965ebf33SHaavard Skinnemoen smp_wmb(); 15957d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 15967d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 1597965ebf33SHaavard Skinnemoen return; 15987d2be074SHaavard Skinnemoen } 15992c96a293SLudovic Desroches } while (status & ATMCI_RXRDY); 16007d2be074SHaavard Skinnemoen 16017d2be074SHaavard Skinnemoen host->pio_offset = offset; 16027d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 16037d2be074SHaavard Skinnemoen 16047d2be074SHaavard Skinnemoen return; 16057d2be074SHaavard Skinnemoen 16067d2be074SHaavard Skinnemoen done: 160703fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_RXRDY); 160803fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_NOTBUSY); 16097d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 1610965ebf33SHaavard Skinnemoen smp_wmb(); 1611c06ad258SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 16127d2be074SHaavard Skinnemoen } 16137d2be074SHaavard Skinnemoen 16147d2be074SHaavard Skinnemoen static void atmci_write_data_pio(struct atmel_mci *host) 16157d2be074SHaavard Skinnemoen { 16167d2be074SHaavard Skinnemoen struct scatterlist *sg = host->sg; 16177d2be074SHaavard Skinnemoen void *buf = sg_virt(sg); 16187d2be074SHaavard Skinnemoen unsigned int offset = host->pio_offset; 16197d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 16207d2be074SHaavard Skinnemoen u32 value; 16217d2be074SHaavard Skinnemoen u32 status; 16227d2be074SHaavard Skinnemoen unsigned int nbytes = 0; 16237d2be074SHaavard Skinnemoen 16247d2be074SHaavard Skinnemoen do { 16257d2be074SHaavard Skinnemoen if (likely(offset + 4 <= sg->length)) { 16267d2be074SHaavard Skinnemoen value = get_unaligned((u32 *)(buf + offset)); 162703fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_TDR, value); 16287d2be074SHaavard Skinnemoen 16297d2be074SHaavard Skinnemoen offset += 4; 16307d2be074SHaavard Skinnemoen nbytes += 4; 16317d2be074SHaavard Skinnemoen if (offset == sg->length) { 16327d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 16337d2be074SHaavard Skinnemoen if (!sg) 16347d2be074SHaavard Skinnemoen goto done; 16357d2be074SHaavard Skinnemoen 16367d2be074SHaavard Skinnemoen offset = 0; 16377d2be074SHaavard Skinnemoen buf = sg_virt(sg); 16387d2be074SHaavard Skinnemoen } 16397d2be074SHaavard Skinnemoen } else { 16407d2be074SHaavard Skinnemoen unsigned int remaining = sg->length - offset; 16417d2be074SHaavard Skinnemoen 16427d2be074SHaavard Skinnemoen value = 0; 16437d2be074SHaavard Skinnemoen memcpy(&value, buf + offset, remaining); 16447d2be074SHaavard Skinnemoen nbytes += remaining; 16457d2be074SHaavard Skinnemoen 16467d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 16477d2be074SHaavard Skinnemoen if (!sg) { 164803fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_TDR, value); 16497d2be074SHaavard Skinnemoen goto done; 16507d2be074SHaavard Skinnemoen } 16517d2be074SHaavard Skinnemoen 16527d2be074SHaavard Skinnemoen offset = 4 - remaining; 16537d2be074SHaavard Skinnemoen buf = sg_virt(sg); 16547d2be074SHaavard Skinnemoen memcpy((u8 *)&value + remaining, buf, offset); 165503fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_TDR, value); 16567d2be074SHaavard Skinnemoen nbytes += offset; 16577d2be074SHaavard Skinnemoen } 16587d2be074SHaavard Skinnemoen 165903fc9a7fSLudovic Desroches status = atmci_readl(host, ATMCI_SR); 16607d2be074SHaavard Skinnemoen if (status & ATMCI_DATA_ERROR_FLAGS) { 166103fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, (ATMCI_NOTBUSY | ATMCI_TXRDY 16627d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS)); 16637d2be074SHaavard Skinnemoen host->data_status = status; 1664965ebf33SHaavard Skinnemoen data->bytes_xfered += nbytes; 1665965ebf33SHaavard Skinnemoen smp_wmb(); 16667d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 16677d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 1668965ebf33SHaavard Skinnemoen return; 16697d2be074SHaavard Skinnemoen } 16702c96a293SLudovic Desroches } while (status & ATMCI_TXRDY); 16717d2be074SHaavard Skinnemoen 16727d2be074SHaavard Skinnemoen host->pio_offset = offset; 16737d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 16747d2be074SHaavard Skinnemoen 16757d2be074SHaavard Skinnemoen return; 16767d2be074SHaavard Skinnemoen 16777d2be074SHaavard Skinnemoen done: 167803fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_TXRDY); 167903fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_NOTBUSY); 16807d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 1681965ebf33SHaavard Skinnemoen smp_wmb(); 1682c06ad258SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 16837d2be074SHaavard Skinnemoen } 16847d2be074SHaavard Skinnemoen 1685965ebf33SHaavard Skinnemoen static void atmci_cmd_interrupt(struct atmel_mci *host, u32 status) 16867d2be074SHaavard Skinnemoen { 168703fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_CMDRDY); 16887d2be074SHaavard Skinnemoen 16897d2be074SHaavard Skinnemoen host->cmd_status = status; 1690965ebf33SHaavard Skinnemoen smp_wmb(); 16917d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_CMD_COMPLETE); 16927d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 16937d2be074SHaavard Skinnemoen } 16947d2be074SHaavard Skinnemoen 169588ff82edSAnders Grahn static void atmci_sdio_interrupt(struct atmel_mci *host, u32 status) 169688ff82edSAnders Grahn { 169788ff82edSAnders Grahn int i; 169888ff82edSAnders Grahn 16992c96a293SLudovic Desroches for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) { 170088ff82edSAnders Grahn struct atmel_mci_slot *slot = host->slot[i]; 170188ff82edSAnders Grahn if (slot && (status & slot->sdio_irq)) { 170288ff82edSAnders Grahn mmc_signal_sdio_irq(slot->mmc); 170388ff82edSAnders Grahn } 170488ff82edSAnders Grahn } 170588ff82edSAnders Grahn } 170688ff82edSAnders Grahn 170788ff82edSAnders Grahn 17087d2be074SHaavard Skinnemoen static irqreturn_t atmci_interrupt(int irq, void *dev_id) 17097d2be074SHaavard Skinnemoen { 1710965ebf33SHaavard Skinnemoen struct atmel_mci *host = dev_id; 17117d2be074SHaavard Skinnemoen u32 status, mask, pending; 17127d2be074SHaavard Skinnemoen unsigned int pass_count = 0; 17137d2be074SHaavard Skinnemoen 17147d2be074SHaavard Skinnemoen do { 171503fc9a7fSLudovic Desroches status = atmci_readl(host, ATMCI_SR); 171603fc9a7fSLudovic Desroches mask = atmci_readl(host, ATMCI_IMR); 17177d2be074SHaavard Skinnemoen pending = status & mask; 17187d2be074SHaavard Skinnemoen if (!pending) 17197d2be074SHaavard Skinnemoen break; 17207d2be074SHaavard Skinnemoen 17217d2be074SHaavard Skinnemoen if (pending & ATMCI_DATA_ERROR_FLAGS) { 172203fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_DATA_ERROR_FLAGS 17232c96a293SLudovic Desroches | ATMCI_RXRDY | ATMCI_TXRDY); 172403fc9a7fSLudovic Desroches pending &= atmci_readl(host, ATMCI_IMR); 1725965ebf33SHaavard Skinnemoen 17267d2be074SHaavard Skinnemoen host->data_status = status; 1727965ebf33SHaavard Skinnemoen smp_wmb(); 17287d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 17297d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 17307d2be074SHaavard Skinnemoen } 1731796211b7SLudovic Desroches 1732796211b7SLudovic Desroches if (pending & ATMCI_TXBUFE) { 1733796211b7SLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_TXBUFE); 17347e8ba228SLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_ENDTX); 1735796211b7SLudovic Desroches /* 1736796211b7SLudovic Desroches * We can receive this interruption before having configured 1737796211b7SLudovic Desroches * the second pdc buffer, so we need to reconfigure first and 1738796211b7SLudovic Desroches * second buffers again 1739796211b7SLudovic Desroches */ 1740796211b7SLudovic Desroches if (host->data_size) { 1741796211b7SLudovic Desroches atmci_pdc_set_both_buf(host, XFER_TRANSMIT); 17427e8ba228SLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_ENDTX); 1743796211b7SLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_TXBUFE); 1744796211b7SLudovic Desroches } else { 1745796211b7SLudovic Desroches atmci_pdc_complete(host); 1746796211b7SLudovic Desroches } 17477e8ba228SLudovic Desroches } else if (pending & ATMCI_ENDTX) { 17487e8ba228SLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_ENDTX); 17497e8ba228SLudovic Desroches 17507e8ba228SLudovic Desroches if (host->data_size) { 17517e8ba228SLudovic Desroches atmci_pdc_set_single_buf(host, 17527e8ba228SLudovic Desroches XFER_TRANSMIT, PDC_SECOND_BUF); 17537e8ba228SLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_ENDTX); 17547e8ba228SLudovic Desroches } 1755796211b7SLudovic Desroches } 1756796211b7SLudovic Desroches 17577e8ba228SLudovic Desroches if (pending & ATMCI_RXBUFF) { 17587e8ba228SLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_RXBUFF); 17597e8ba228SLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_ENDRX); 17607e8ba228SLudovic Desroches /* 17617e8ba228SLudovic Desroches * We can receive this interruption before having configured 17627e8ba228SLudovic Desroches * the second pdc buffer, so we need to reconfigure first and 17637e8ba228SLudovic Desroches * second buffers again 17647e8ba228SLudovic Desroches */ 17657e8ba228SLudovic Desroches if (host->data_size) { 17667e8ba228SLudovic Desroches atmci_pdc_set_both_buf(host, XFER_RECEIVE); 17677e8ba228SLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_ENDRX); 17687e8ba228SLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_RXBUFF); 17697e8ba228SLudovic Desroches } else { 17707e8ba228SLudovic Desroches atmci_pdc_complete(host); 17717e8ba228SLudovic Desroches } 17727e8ba228SLudovic Desroches } else if (pending & ATMCI_ENDRX) { 1773796211b7SLudovic Desroches atmci_writel(host, ATMCI_IDR, ATMCI_ENDRX); 1774796211b7SLudovic Desroches 1775796211b7SLudovic Desroches if (host->data_size) { 1776796211b7SLudovic Desroches atmci_pdc_set_single_buf(host, 1777796211b7SLudovic Desroches XFER_RECEIVE, PDC_SECOND_BUF); 1778796211b7SLudovic Desroches atmci_writel(host, ATMCI_IER, ATMCI_ENDRX); 1779796211b7SLudovic Desroches } 1780796211b7SLudovic Desroches } 1781796211b7SLudovic Desroches 1782796211b7SLudovic Desroches 17832c96a293SLudovic Desroches if (pending & ATMCI_NOTBUSY) { 178403fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, 17852c96a293SLudovic Desroches ATMCI_DATA_ERROR_FLAGS | ATMCI_NOTBUSY); 1786ca55f46eSHaavard Skinnemoen if (!host->data_status) 1787c06ad258SHaavard Skinnemoen host->data_status = status; 1788965ebf33SHaavard Skinnemoen smp_wmb(); 17897d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_COMPLETE); 17907d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 17917d2be074SHaavard Skinnemoen } 17922c96a293SLudovic Desroches if (pending & ATMCI_RXRDY) 17937d2be074SHaavard Skinnemoen atmci_read_data_pio(host); 17942c96a293SLudovic Desroches if (pending & ATMCI_TXRDY) 17957d2be074SHaavard Skinnemoen atmci_write_data_pio(host); 17967d2be074SHaavard Skinnemoen 17972c96a293SLudovic Desroches if (pending & ATMCI_CMDRDY) 1798965ebf33SHaavard Skinnemoen atmci_cmd_interrupt(host, status); 179988ff82edSAnders Grahn 18002c96a293SLudovic Desroches if (pending & (ATMCI_SDIOIRQA | ATMCI_SDIOIRQB)) 180188ff82edSAnders Grahn atmci_sdio_interrupt(host, status); 180288ff82edSAnders Grahn 18037d2be074SHaavard Skinnemoen } while (pass_count++ < 5); 18047d2be074SHaavard Skinnemoen 18057d2be074SHaavard Skinnemoen return pass_count ? IRQ_HANDLED : IRQ_NONE; 18067d2be074SHaavard Skinnemoen } 18077d2be074SHaavard Skinnemoen 18087d2be074SHaavard Skinnemoen static irqreturn_t atmci_detect_interrupt(int irq, void *dev_id) 18097d2be074SHaavard Skinnemoen { 1810965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = dev_id; 18117d2be074SHaavard Skinnemoen 18127d2be074SHaavard Skinnemoen /* 18137d2be074SHaavard Skinnemoen * Disable interrupts until the pin has stabilized and check 18147d2be074SHaavard Skinnemoen * the state then. Use mod_timer() since we may be in the 18157d2be074SHaavard Skinnemoen * middle of the timer routine when this interrupt triggers. 18167d2be074SHaavard Skinnemoen */ 18177d2be074SHaavard Skinnemoen disable_irq_nosync(irq); 1818965ebf33SHaavard Skinnemoen mod_timer(&slot->detect_timer, jiffies + msecs_to_jiffies(20)); 18197d2be074SHaavard Skinnemoen 18207d2be074SHaavard Skinnemoen return IRQ_HANDLED; 18217d2be074SHaavard Skinnemoen } 18227d2be074SHaavard Skinnemoen 1823965ebf33SHaavard Skinnemoen static int __init atmci_init_slot(struct atmel_mci *host, 1824965ebf33SHaavard Skinnemoen struct mci_slot_pdata *slot_data, unsigned int id, 182588ff82edSAnders Grahn u32 sdc_reg, u32 sdio_irq) 1826965ebf33SHaavard Skinnemoen { 1827965ebf33SHaavard Skinnemoen struct mmc_host *mmc; 1828965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot; 1829965ebf33SHaavard Skinnemoen 1830965ebf33SHaavard Skinnemoen mmc = mmc_alloc_host(sizeof(struct atmel_mci_slot), &host->pdev->dev); 1831965ebf33SHaavard Skinnemoen if (!mmc) 1832965ebf33SHaavard Skinnemoen return -ENOMEM; 1833965ebf33SHaavard Skinnemoen 1834965ebf33SHaavard Skinnemoen slot = mmc_priv(mmc); 1835965ebf33SHaavard Skinnemoen slot->mmc = mmc; 1836965ebf33SHaavard Skinnemoen slot->host = host; 1837965ebf33SHaavard Skinnemoen slot->detect_pin = slot_data->detect_pin; 1838965ebf33SHaavard Skinnemoen slot->wp_pin = slot_data->wp_pin; 18391c1452beSJonas Larsson slot->detect_is_active_high = slot_data->detect_is_active_high; 1840965ebf33SHaavard Skinnemoen slot->sdc_reg = sdc_reg; 184188ff82edSAnders Grahn slot->sdio_irq = sdio_irq; 1842965ebf33SHaavard Skinnemoen 1843965ebf33SHaavard Skinnemoen mmc->ops = &atmci_ops; 1844965ebf33SHaavard Skinnemoen mmc->f_min = DIV_ROUND_UP(host->bus_hz, 512); 1845965ebf33SHaavard Skinnemoen mmc->f_max = host->bus_hz / 2; 1846965ebf33SHaavard Skinnemoen mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 184788ff82edSAnders Grahn if (sdio_irq) 184888ff82edSAnders Grahn mmc->caps |= MMC_CAP_SDIO_IRQ; 1849796211b7SLudovic Desroches if (host->caps.has_highspeed) 185099ddffd8SNicolas Ferre mmc->caps |= MMC_CAP_SD_HIGHSPEED; 1851965ebf33SHaavard Skinnemoen if (slot_data->bus_width >= 4) 1852965ebf33SHaavard Skinnemoen mmc->caps |= MMC_CAP_4_BIT_DATA; 1853965ebf33SHaavard Skinnemoen 1854a36274e0SMartin K. Petersen mmc->max_segs = 64; 1855965ebf33SHaavard Skinnemoen mmc->max_req_size = 32768 * 512; 1856965ebf33SHaavard Skinnemoen mmc->max_blk_size = 32768; 1857965ebf33SHaavard Skinnemoen mmc->max_blk_count = 512; 1858965ebf33SHaavard Skinnemoen 1859965ebf33SHaavard Skinnemoen /* Assume card is present initially */ 1860965ebf33SHaavard Skinnemoen set_bit(ATMCI_CARD_PRESENT, &slot->flags); 1861965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 1862965ebf33SHaavard Skinnemoen if (gpio_request(slot->detect_pin, "mmc_detect")) { 1863965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "no detect pin available\n"); 1864965ebf33SHaavard Skinnemoen slot->detect_pin = -EBUSY; 18651c1452beSJonas Larsson } else if (gpio_get_value(slot->detect_pin) ^ 18661c1452beSJonas Larsson slot->detect_is_active_high) { 1867965ebf33SHaavard Skinnemoen clear_bit(ATMCI_CARD_PRESENT, &slot->flags); 1868965ebf33SHaavard Skinnemoen } 1869965ebf33SHaavard Skinnemoen } 1870965ebf33SHaavard Skinnemoen 1871965ebf33SHaavard Skinnemoen if (!gpio_is_valid(slot->detect_pin)) 1872965ebf33SHaavard Skinnemoen mmc->caps |= MMC_CAP_NEEDS_POLL; 1873965ebf33SHaavard Skinnemoen 1874965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->wp_pin)) { 1875965ebf33SHaavard Skinnemoen if (gpio_request(slot->wp_pin, "mmc_wp")) { 1876965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "no WP pin available\n"); 1877965ebf33SHaavard Skinnemoen slot->wp_pin = -EBUSY; 1878965ebf33SHaavard Skinnemoen } 1879965ebf33SHaavard Skinnemoen } 1880965ebf33SHaavard Skinnemoen 1881965ebf33SHaavard Skinnemoen host->slot[id] = slot; 1882965ebf33SHaavard Skinnemoen mmc_add_host(mmc); 1883965ebf33SHaavard Skinnemoen 1884965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 1885965ebf33SHaavard Skinnemoen int ret; 1886965ebf33SHaavard Skinnemoen 1887965ebf33SHaavard Skinnemoen setup_timer(&slot->detect_timer, atmci_detect_change, 1888965ebf33SHaavard Skinnemoen (unsigned long)slot); 1889965ebf33SHaavard Skinnemoen 1890965ebf33SHaavard Skinnemoen ret = request_irq(gpio_to_irq(slot->detect_pin), 1891965ebf33SHaavard Skinnemoen atmci_detect_interrupt, 1892965ebf33SHaavard Skinnemoen IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, 1893965ebf33SHaavard Skinnemoen "mmc-detect", slot); 1894965ebf33SHaavard Skinnemoen if (ret) { 1895965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, 1896965ebf33SHaavard Skinnemoen "could not request IRQ %d for detect pin\n", 1897965ebf33SHaavard Skinnemoen gpio_to_irq(slot->detect_pin)); 1898965ebf33SHaavard Skinnemoen gpio_free(slot->detect_pin); 1899965ebf33SHaavard Skinnemoen slot->detect_pin = -EBUSY; 1900965ebf33SHaavard Skinnemoen } 1901965ebf33SHaavard Skinnemoen } 1902965ebf33SHaavard Skinnemoen 1903965ebf33SHaavard Skinnemoen atmci_init_debugfs(slot); 1904965ebf33SHaavard Skinnemoen 1905965ebf33SHaavard Skinnemoen return 0; 1906965ebf33SHaavard Skinnemoen } 1907965ebf33SHaavard Skinnemoen 1908965ebf33SHaavard Skinnemoen static void __exit atmci_cleanup_slot(struct atmel_mci_slot *slot, 1909965ebf33SHaavard Skinnemoen unsigned int id) 1910965ebf33SHaavard Skinnemoen { 1911965ebf33SHaavard Skinnemoen /* Debugfs stuff is cleaned up by mmc core */ 1912965ebf33SHaavard Skinnemoen 1913965ebf33SHaavard Skinnemoen set_bit(ATMCI_SHUTDOWN, &slot->flags); 1914965ebf33SHaavard Skinnemoen smp_wmb(); 1915965ebf33SHaavard Skinnemoen 1916965ebf33SHaavard Skinnemoen mmc_remove_host(slot->mmc); 1917965ebf33SHaavard Skinnemoen 1918965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 1919965ebf33SHaavard Skinnemoen int pin = slot->detect_pin; 1920965ebf33SHaavard Skinnemoen 1921965ebf33SHaavard Skinnemoen free_irq(gpio_to_irq(pin), slot); 1922965ebf33SHaavard Skinnemoen del_timer_sync(&slot->detect_timer); 1923965ebf33SHaavard Skinnemoen gpio_free(pin); 1924965ebf33SHaavard Skinnemoen } 1925965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->wp_pin)) 1926965ebf33SHaavard Skinnemoen gpio_free(slot->wp_pin); 1927965ebf33SHaavard Skinnemoen 1928965ebf33SHaavard Skinnemoen slot->host->slot[id] = NULL; 1929965ebf33SHaavard Skinnemoen mmc_free_host(slot->mmc); 1930965ebf33SHaavard Skinnemoen } 1931965ebf33SHaavard Skinnemoen 19322c96a293SLudovic Desroches static bool atmci_filter(struct dma_chan *chan, void *slave) 193374465b4fSDan Williams { 19342635d1baSNicolas Ferre struct mci_dma_data *sl = slave; 193574465b4fSDan Williams 19362635d1baSNicolas Ferre if (sl && find_slave_dev(sl) == chan->device->dev) { 19372635d1baSNicolas Ferre chan->private = slave_data_ptr(sl); 19387dd60251SDan Williams return true; 19392635d1baSNicolas Ferre } else { 19407dd60251SDan Williams return false; 194174465b4fSDan Williams } 19422635d1baSNicolas Ferre } 19432635d1baSNicolas Ferre 19442635d1baSNicolas Ferre static void atmci_configure_dma(struct atmel_mci *host) 19452635d1baSNicolas Ferre { 19462635d1baSNicolas Ferre struct mci_platform_data *pdata; 19472635d1baSNicolas Ferre 19482635d1baSNicolas Ferre if (host == NULL) 19492635d1baSNicolas Ferre return; 19502635d1baSNicolas Ferre 19512635d1baSNicolas Ferre pdata = host->pdev->dev.platform_data; 19522635d1baSNicolas Ferre 19532635d1baSNicolas Ferre if (pdata && find_slave_dev(pdata->dma_slave)) { 19542635d1baSNicolas Ferre dma_cap_mask_t mask; 19552635d1baSNicolas Ferre 19562635d1baSNicolas Ferre setup_dma_addr(pdata->dma_slave, 19572c96a293SLudovic Desroches host->mapbase + ATMCI_TDR, 19582c96a293SLudovic Desroches host->mapbase + ATMCI_RDR); 19592635d1baSNicolas Ferre 19602635d1baSNicolas Ferre /* Try to grab a DMA channel */ 19612635d1baSNicolas Ferre dma_cap_zero(mask); 19622635d1baSNicolas Ferre dma_cap_set(DMA_SLAVE, mask); 19632635d1baSNicolas Ferre host->dma.chan = 19642c96a293SLudovic Desroches dma_request_channel(mask, atmci_filter, pdata->dma_slave); 19652635d1baSNicolas Ferre } 19662635d1baSNicolas Ferre if (!host->dma.chan) 19672635d1baSNicolas Ferre dev_notice(&host->pdev->dev, "DMA not available, using PIO\n"); 196874791a2dSNicolas Ferre else 196974791a2dSNicolas Ferre dev_info(&host->pdev->dev, 197074791a2dSNicolas Ferre "Using %s for DMA transfers\n", 197174791a2dSNicolas Ferre dma_chan_name(host->dma.chan)); 19722635d1baSNicolas Ferre } 1973796211b7SLudovic Desroches 1974796211b7SLudovic Desroches static inline unsigned int atmci_get_version(struct atmel_mci *host) 1975796211b7SLudovic Desroches { 1976796211b7SLudovic Desroches return atmci_readl(host, ATMCI_VERSION) & 0x00000fff; 1977796211b7SLudovic Desroches } 1978796211b7SLudovic Desroches 1979796211b7SLudovic Desroches /* 1980796211b7SLudovic Desroches * HSMCI (High Speed MCI) module is not fully compatible with MCI module. 1981796211b7SLudovic Desroches * HSMCI provides DMA support and a new config register but no more supports 1982796211b7SLudovic Desroches * PDC. 1983796211b7SLudovic Desroches */ 1984796211b7SLudovic Desroches static void __init atmci_get_cap(struct atmel_mci *host) 1985796211b7SLudovic Desroches { 1986796211b7SLudovic Desroches unsigned int version; 1987796211b7SLudovic Desroches 1988796211b7SLudovic Desroches version = atmci_get_version(host); 1989796211b7SLudovic Desroches dev_info(&host->pdev->dev, 1990796211b7SLudovic Desroches "version: 0x%x\n", version); 1991796211b7SLudovic Desroches 1992796211b7SLudovic Desroches host->caps.has_dma = 0; 1993796211b7SLudovic Desroches host->caps.has_pdc = 0; 1994796211b7SLudovic Desroches host->caps.has_cfg_reg = 0; 1995796211b7SLudovic Desroches host->caps.has_cstor_reg = 0; 1996796211b7SLudovic Desroches host->caps.has_highspeed = 0; 1997796211b7SLudovic Desroches host->caps.has_rwproof = 0; 1998796211b7SLudovic Desroches 1999796211b7SLudovic Desroches /* keep only major version number */ 2000796211b7SLudovic Desroches switch (version & 0xf00) { 2001796211b7SLudovic Desroches case 0x100: 2002796211b7SLudovic Desroches case 0x200: 2003796211b7SLudovic Desroches host->caps.has_pdc = 1; 2004796211b7SLudovic Desroches host->caps.has_rwproof = 1; 2005796211b7SLudovic Desroches break; 2006796211b7SLudovic Desroches case 0x300: 2007796211b7SLudovic Desroches case 0x400: 2008796211b7SLudovic Desroches case 0x500: 2009796211b7SLudovic Desroches #ifdef CONFIG_AT_HDMAC 2010796211b7SLudovic Desroches host->caps.has_dma = 1; 20112635d1baSNicolas Ferre #else 2012796211b7SLudovic Desroches host->caps.has_dma = 0; 2013796211b7SLudovic Desroches dev_info(&host->pdev->dev, 2014796211b7SLudovic Desroches "has dma capability but dma engine is not selected, then use pio\n"); 201574465b4fSDan Williams #endif 2016796211b7SLudovic Desroches host->caps.has_cfg_reg = 1; 2017796211b7SLudovic Desroches host->caps.has_cstor_reg = 1; 2018796211b7SLudovic Desroches host->caps.has_highspeed = 1; 2019796211b7SLudovic Desroches host->caps.has_rwproof = 1; 2020796211b7SLudovic Desroches break; 2021796211b7SLudovic Desroches default: 2022796211b7SLudovic Desroches dev_warn(&host->pdev->dev, 2023796211b7SLudovic Desroches "Unmanaged mci version, set minimum capabilities\n"); 2024796211b7SLudovic Desroches break; 2025796211b7SLudovic Desroches } 2026796211b7SLudovic Desroches } 202774465b4fSDan Williams 20287d2be074SHaavard Skinnemoen static int __init atmci_probe(struct platform_device *pdev) 20297d2be074SHaavard Skinnemoen { 20307d2be074SHaavard Skinnemoen struct mci_platform_data *pdata; 20317d2be074SHaavard Skinnemoen struct atmel_mci *host; 20327d2be074SHaavard Skinnemoen struct resource *regs; 2033965ebf33SHaavard Skinnemoen unsigned int nr_slots; 20347d2be074SHaavard Skinnemoen int irq; 20357d2be074SHaavard Skinnemoen int ret; 20367d2be074SHaavard Skinnemoen 20377d2be074SHaavard Skinnemoen regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 20387d2be074SHaavard Skinnemoen if (!regs) 20397d2be074SHaavard Skinnemoen return -ENXIO; 20407d2be074SHaavard Skinnemoen pdata = pdev->dev.platform_data; 20417d2be074SHaavard Skinnemoen if (!pdata) 20427d2be074SHaavard Skinnemoen return -ENXIO; 20437d2be074SHaavard Skinnemoen irq = platform_get_irq(pdev, 0); 20447d2be074SHaavard Skinnemoen if (irq < 0) 20457d2be074SHaavard Skinnemoen return irq; 20467d2be074SHaavard Skinnemoen 2047965ebf33SHaavard Skinnemoen host = kzalloc(sizeof(struct atmel_mci), GFP_KERNEL); 2048965ebf33SHaavard Skinnemoen if (!host) 20497d2be074SHaavard Skinnemoen return -ENOMEM; 20507d2be074SHaavard Skinnemoen 20517d2be074SHaavard Skinnemoen host->pdev = pdev; 2052965ebf33SHaavard Skinnemoen spin_lock_init(&host->lock); 2053965ebf33SHaavard Skinnemoen INIT_LIST_HEAD(&host->queue); 20547d2be074SHaavard Skinnemoen 20557d2be074SHaavard Skinnemoen host->mck = clk_get(&pdev->dev, "mci_clk"); 20567d2be074SHaavard Skinnemoen if (IS_ERR(host->mck)) { 20577d2be074SHaavard Skinnemoen ret = PTR_ERR(host->mck); 20587d2be074SHaavard Skinnemoen goto err_clk_get; 20597d2be074SHaavard Skinnemoen } 20607d2be074SHaavard Skinnemoen 20617d2be074SHaavard Skinnemoen ret = -ENOMEM; 2062e8e3f6caSH Hartley Sweeten host->regs = ioremap(regs->start, resource_size(regs)); 20637d2be074SHaavard Skinnemoen if (!host->regs) 20647d2be074SHaavard Skinnemoen goto err_ioremap; 20657d2be074SHaavard Skinnemoen 20667d2be074SHaavard Skinnemoen clk_enable(host->mck); 206703fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CR, ATMCI_CR_SWRST); 20687d2be074SHaavard Skinnemoen host->bus_hz = clk_get_rate(host->mck); 20697d2be074SHaavard Skinnemoen clk_disable(host->mck); 20707d2be074SHaavard Skinnemoen 20717d2be074SHaavard Skinnemoen host->mapbase = regs->start; 20727d2be074SHaavard Skinnemoen 2073965ebf33SHaavard Skinnemoen tasklet_init(&host->tasklet, atmci_tasklet_func, (unsigned long)host); 20747d2be074SHaavard Skinnemoen 207589c8aa20SKay Sievers ret = request_irq(irq, atmci_interrupt, 0, dev_name(&pdev->dev), host); 20767d2be074SHaavard Skinnemoen if (ret) 20777d2be074SHaavard Skinnemoen goto err_request_irq; 20787d2be074SHaavard Skinnemoen 2079796211b7SLudovic Desroches /* Get MCI capabilities and set operations according to it */ 2080796211b7SLudovic Desroches atmci_get_cap(host); 2081796211b7SLudovic Desroches if (host->caps.has_dma) { 2082796211b7SLudovic Desroches dev_info(&pdev->dev, "using DMA\n"); 2083796211b7SLudovic Desroches host->prepare_data = &atmci_prepare_data_dma; 2084796211b7SLudovic Desroches host->submit_data = &atmci_submit_data_dma; 2085796211b7SLudovic Desroches host->stop_transfer = &atmci_stop_transfer_dma; 2086796211b7SLudovic Desroches } else if (host->caps.has_pdc) { 2087796211b7SLudovic Desroches dev_info(&pdev->dev, "using PDC\n"); 2088796211b7SLudovic Desroches host->prepare_data = &atmci_prepare_data_pdc; 2089796211b7SLudovic Desroches host->submit_data = &atmci_submit_data_pdc; 2090796211b7SLudovic Desroches host->stop_transfer = &atmci_stop_transfer_pdc; 2091796211b7SLudovic Desroches } else { 2092796211b7SLudovic Desroches dev_info(&pdev->dev, "no DMA, no PDC\n"); 2093796211b7SLudovic Desroches host->prepare_data = &atmci_prepare_data; 2094796211b7SLudovic Desroches host->submit_data = &atmci_submit_data; 2095796211b7SLudovic Desroches host->stop_transfer = &atmci_stop_transfer; 2096796211b7SLudovic Desroches } 2097796211b7SLudovic Desroches 2098796211b7SLudovic Desroches if (host->caps.has_dma) 20992635d1baSNicolas Ferre atmci_configure_dma(host); 210065e8b083SHaavard Skinnemoen 21017d2be074SHaavard Skinnemoen platform_set_drvdata(pdev, host); 21027d2be074SHaavard Skinnemoen 2103965ebf33SHaavard Skinnemoen /* We need at least one slot to succeed */ 2104965ebf33SHaavard Skinnemoen nr_slots = 0; 2105965ebf33SHaavard Skinnemoen ret = -ENODEV; 2106965ebf33SHaavard Skinnemoen if (pdata->slot[0].bus_width) { 2107965ebf33SHaavard Skinnemoen ret = atmci_init_slot(host, &pdata->slot[0], 21082c96a293SLudovic Desroches 0, ATMCI_SDCSEL_SLOT_A, ATMCI_SDIOIRQA); 2109965ebf33SHaavard Skinnemoen if (!ret) 2110965ebf33SHaavard Skinnemoen nr_slots++; 21117d2be074SHaavard Skinnemoen } 2112965ebf33SHaavard Skinnemoen if (pdata->slot[1].bus_width) { 2113965ebf33SHaavard Skinnemoen ret = atmci_init_slot(host, &pdata->slot[1], 21142c96a293SLudovic Desroches 1, ATMCI_SDCSEL_SLOT_B, ATMCI_SDIOIRQB); 2115965ebf33SHaavard Skinnemoen if (!ret) 2116965ebf33SHaavard Skinnemoen nr_slots++; 21177d2be074SHaavard Skinnemoen } 21187d2be074SHaavard Skinnemoen 211904d699c3SRob Emanuele if (!nr_slots) { 212004d699c3SRob Emanuele dev_err(&pdev->dev, "init failed: no slot defined\n"); 2121965ebf33SHaavard Skinnemoen goto err_init_slot; 212204d699c3SRob Emanuele } 21237d2be074SHaavard Skinnemoen 2124965ebf33SHaavard Skinnemoen dev_info(&pdev->dev, 2125965ebf33SHaavard Skinnemoen "Atmel MCI controller at 0x%08lx irq %d, %u slots\n", 2126965ebf33SHaavard Skinnemoen host->mapbase, irq, nr_slots); 2127deec9ae3SHaavard Skinnemoen 21287d2be074SHaavard Skinnemoen return 0; 21297d2be074SHaavard Skinnemoen 2130965ebf33SHaavard Skinnemoen err_init_slot: 213174465b4fSDan Williams if (host->dma.chan) 213274465b4fSDan Williams dma_release_channel(host->dma.chan); 2133965ebf33SHaavard Skinnemoen free_irq(irq, host); 21347d2be074SHaavard Skinnemoen err_request_irq: 21357d2be074SHaavard Skinnemoen iounmap(host->regs); 21367d2be074SHaavard Skinnemoen err_ioremap: 21377d2be074SHaavard Skinnemoen clk_put(host->mck); 21387d2be074SHaavard Skinnemoen err_clk_get: 2139965ebf33SHaavard Skinnemoen kfree(host); 21407d2be074SHaavard Skinnemoen return ret; 21417d2be074SHaavard Skinnemoen } 21427d2be074SHaavard Skinnemoen 21437d2be074SHaavard Skinnemoen static int __exit atmci_remove(struct platform_device *pdev) 21447d2be074SHaavard Skinnemoen { 21457d2be074SHaavard Skinnemoen struct atmel_mci *host = platform_get_drvdata(pdev); 2146965ebf33SHaavard Skinnemoen unsigned int i; 21477d2be074SHaavard Skinnemoen 21487d2be074SHaavard Skinnemoen platform_set_drvdata(pdev, NULL); 21497d2be074SHaavard Skinnemoen 21502c96a293SLudovic Desroches for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) { 2151965ebf33SHaavard Skinnemoen if (host->slot[i]) 2152965ebf33SHaavard Skinnemoen atmci_cleanup_slot(host->slot[i], i); 21537d2be074SHaavard Skinnemoen } 21547d2be074SHaavard Skinnemoen 21557d2be074SHaavard Skinnemoen clk_enable(host->mck); 215603fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_IDR, ~0UL); 215703fc9a7fSLudovic Desroches atmci_writel(host, ATMCI_CR, ATMCI_CR_MCIDIS); 215803fc9a7fSLudovic Desroches atmci_readl(host, ATMCI_SR); 21597d2be074SHaavard Skinnemoen clk_disable(host->mck); 21607d2be074SHaavard Skinnemoen 216165e8b083SHaavard Skinnemoen #ifdef CONFIG_MMC_ATMELMCI_DMA 216274465b4fSDan Williams if (host->dma.chan) 216374465b4fSDan Williams dma_release_channel(host->dma.chan); 216465e8b083SHaavard Skinnemoen #endif 216565e8b083SHaavard Skinnemoen 2166965ebf33SHaavard Skinnemoen free_irq(platform_get_irq(pdev, 0), host); 21677d2be074SHaavard Skinnemoen iounmap(host->regs); 21687d2be074SHaavard Skinnemoen 21697d2be074SHaavard Skinnemoen clk_put(host->mck); 2170965ebf33SHaavard Skinnemoen kfree(host); 21717d2be074SHaavard Skinnemoen 21727d2be074SHaavard Skinnemoen return 0; 21737d2be074SHaavard Skinnemoen } 21747d2be074SHaavard Skinnemoen 21755c2f2b9bSNicolas Ferre #ifdef CONFIG_PM 21765c2f2b9bSNicolas Ferre static int atmci_suspend(struct device *dev) 21775c2f2b9bSNicolas Ferre { 21785c2f2b9bSNicolas Ferre struct atmel_mci *host = dev_get_drvdata(dev); 21795c2f2b9bSNicolas Ferre int i; 21805c2f2b9bSNicolas Ferre 21812c96a293SLudovic Desroches for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) { 21825c2f2b9bSNicolas Ferre struct atmel_mci_slot *slot = host->slot[i]; 21835c2f2b9bSNicolas Ferre int ret; 21845c2f2b9bSNicolas Ferre 21855c2f2b9bSNicolas Ferre if (!slot) 21865c2f2b9bSNicolas Ferre continue; 21875c2f2b9bSNicolas Ferre ret = mmc_suspend_host(slot->mmc); 21885c2f2b9bSNicolas Ferre if (ret < 0) { 21895c2f2b9bSNicolas Ferre while (--i >= 0) { 21905c2f2b9bSNicolas Ferre slot = host->slot[i]; 21915c2f2b9bSNicolas Ferre if (slot 21925c2f2b9bSNicolas Ferre && test_bit(ATMCI_SUSPENDED, &slot->flags)) { 21935c2f2b9bSNicolas Ferre mmc_resume_host(host->slot[i]->mmc); 21945c2f2b9bSNicolas Ferre clear_bit(ATMCI_SUSPENDED, &slot->flags); 21955c2f2b9bSNicolas Ferre } 21965c2f2b9bSNicolas Ferre } 21975c2f2b9bSNicolas Ferre return ret; 21985c2f2b9bSNicolas Ferre } else { 21995c2f2b9bSNicolas Ferre set_bit(ATMCI_SUSPENDED, &slot->flags); 22005c2f2b9bSNicolas Ferre } 22015c2f2b9bSNicolas Ferre } 22025c2f2b9bSNicolas Ferre 22035c2f2b9bSNicolas Ferre return 0; 22045c2f2b9bSNicolas Ferre } 22055c2f2b9bSNicolas Ferre 22065c2f2b9bSNicolas Ferre static int atmci_resume(struct device *dev) 22075c2f2b9bSNicolas Ferre { 22085c2f2b9bSNicolas Ferre struct atmel_mci *host = dev_get_drvdata(dev); 22095c2f2b9bSNicolas Ferre int i; 22105c2f2b9bSNicolas Ferre int ret = 0; 22115c2f2b9bSNicolas Ferre 22122c96a293SLudovic Desroches for (i = 0; i < ATMCI_MAX_NR_SLOTS; i++) { 22135c2f2b9bSNicolas Ferre struct atmel_mci_slot *slot = host->slot[i]; 22145c2f2b9bSNicolas Ferre int err; 22155c2f2b9bSNicolas Ferre 22165c2f2b9bSNicolas Ferre slot = host->slot[i]; 22175c2f2b9bSNicolas Ferre if (!slot) 22185c2f2b9bSNicolas Ferre continue; 22195c2f2b9bSNicolas Ferre if (!test_bit(ATMCI_SUSPENDED, &slot->flags)) 22205c2f2b9bSNicolas Ferre continue; 22215c2f2b9bSNicolas Ferre err = mmc_resume_host(slot->mmc); 22225c2f2b9bSNicolas Ferre if (err < 0) 22235c2f2b9bSNicolas Ferre ret = err; 22245c2f2b9bSNicolas Ferre else 22255c2f2b9bSNicolas Ferre clear_bit(ATMCI_SUSPENDED, &slot->flags); 22265c2f2b9bSNicolas Ferre } 22275c2f2b9bSNicolas Ferre 22285c2f2b9bSNicolas Ferre return ret; 22295c2f2b9bSNicolas Ferre } 22305c2f2b9bSNicolas Ferre static SIMPLE_DEV_PM_OPS(atmci_pm, atmci_suspend, atmci_resume); 22315c2f2b9bSNicolas Ferre #define ATMCI_PM_OPS (&atmci_pm) 22325c2f2b9bSNicolas Ferre #else 22335c2f2b9bSNicolas Ferre #define ATMCI_PM_OPS NULL 22345c2f2b9bSNicolas Ferre #endif 22355c2f2b9bSNicolas Ferre 22367d2be074SHaavard Skinnemoen static struct platform_driver atmci_driver = { 22377d2be074SHaavard Skinnemoen .remove = __exit_p(atmci_remove), 22387d2be074SHaavard Skinnemoen .driver = { 22397d2be074SHaavard Skinnemoen .name = "atmel_mci", 22405c2f2b9bSNicolas Ferre .pm = ATMCI_PM_OPS, 22417d2be074SHaavard Skinnemoen }, 22427d2be074SHaavard Skinnemoen }; 22437d2be074SHaavard Skinnemoen 22447d2be074SHaavard Skinnemoen static int __init atmci_init(void) 22457d2be074SHaavard Skinnemoen { 22467d2be074SHaavard Skinnemoen return platform_driver_probe(&atmci_driver, atmci_probe); 22477d2be074SHaavard Skinnemoen } 22487d2be074SHaavard Skinnemoen 22497d2be074SHaavard Skinnemoen static void __exit atmci_exit(void) 22507d2be074SHaavard Skinnemoen { 22517d2be074SHaavard Skinnemoen platform_driver_unregister(&atmci_driver); 22527d2be074SHaavard Skinnemoen } 22537d2be074SHaavard Skinnemoen 225474465b4fSDan Williams late_initcall(atmci_init); /* try to load after dma driver when built-in */ 22557d2be074SHaavard Skinnemoen module_exit(atmci_exit); 22567d2be074SHaavard Skinnemoen 22577d2be074SHaavard Skinnemoen MODULE_DESCRIPTION("Atmel Multimedia Card Interface driver"); 2258e05503efSJean Delvare MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); 22597d2be074SHaavard Skinnemoen MODULE_LICENSE("GPL v2"); 2260