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> 337d2be074SHaavard Skinnemoen 347d2be074SHaavard Skinnemoen #include <asm/io.h> 357d2be074SHaavard Skinnemoen #include <asm/unaligned.h> 367d2be074SHaavard Skinnemoen 3704d699c3SRob Emanuele #include <mach/cpu.h> 383663b736SHaavard Skinnemoen #include <mach/board.h> 397d2be074SHaavard Skinnemoen 407d2be074SHaavard Skinnemoen #include "atmel-mci-regs.h" 417d2be074SHaavard Skinnemoen 427d2be074SHaavard Skinnemoen #define ATMCI_DATA_ERROR_FLAGS (MCI_DCRCE | MCI_DTOE | MCI_OVRE | MCI_UNRE) 4365e8b083SHaavard Skinnemoen #define ATMCI_DMA_THRESHOLD 16 447d2be074SHaavard Skinnemoen 457d2be074SHaavard Skinnemoen enum { 467d2be074SHaavard Skinnemoen EVENT_CMD_COMPLETE = 0, 477d2be074SHaavard Skinnemoen EVENT_XFER_COMPLETE, 48c06ad258SHaavard Skinnemoen EVENT_DATA_COMPLETE, 49c06ad258SHaavard Skinnemoen EVENT_DATA_ERROR, 50c06ad258SHaavard Skinnemoen }; 51c06ad258SHaavard Skinnemoen 52c06ad258SHaavard Skinnemoen enum atmel_mci_state { 53965ebf33SHaavard Skinnemoen STATE_IDLE = 0, 54965ebf33SHaavard Skinnemoen STATE_SENDING_CMD, 55c06ad258SHaavard Skinnemoen STATE_SENDING_DATA, 56c06ad258SHaavard Skinnemoen STATE_DATA_BUSY, 57c06ad258SHaavard Skinnemoen STATE_SENDING_STOP, 58c06ad258SHaavard Skinnemoen STATE_DATA_ERROR, 597d2be074SHaavard Skinnemoen }; 607d2be074SHaavard Skinnemoen 6165e8b083SHaavard Skinnemoen struct atmel_mci_dma { 6265e8b083SHaavard Skinnemoen #ifdef CONFIG_MMC_ATMELMCI_DMA 6365e8b083SHaavard Skinnemoen struct dma_chan *chan; 6465e8b083SHaavard Skinnemoen struct dma_async_tx_descriptor *data_desc; 6565e8b083SHaavard Skinnemoen #endif 6665e8b083SHaavard Skinnemoen }; 6765e8b083SHaavard Skinnemoen 68965ebf33SHaavard Skinnemoen /** 69965ebf33SHaavard Skinnemoen * struct atmel_mci - MMC controller state shared between all slots 70965ebf33SHaavard Skinnemoen * @lock: Spinlock protecting the queue and associated data. 71965ebf33SHaavard Skinnemoen * @regs: Pointer to MMIO registers. 72965ebf33SHaavard Skinnemoen * @sg: Scatterlist entry currently being processed by PIO code, if any. 73965ebf33SHaavard Skinnemoen * @pio_offset: Offset into the current scatterlist entry. 74965ebf33SHaavard Skinnemoen * @cur_slot: The slot which is currently using the controller. 75965ebf33SHaavard Skinnemoen * @mrq: The request currently being processed on @cur_slot, 76965ebf33SHaavard Skinnemoen * or NULL if the controller is idle. 77965ebf33SHaavard Skinnemoen * @cmd: The command currently being sent to the card, or NULL. 78965ebf33SHaavard Skinnemoen * @data: The data currently being transferred, or NULL if no data 79965ebf33SHaavard Skinnemoen * transfer is in progress. 8065e8b083SHaavard Skinnemoen * @dma: DMA client state. 8165e8b083SHaavard Skinnemoen * @data_chan: DMA channel being used for the current data transfer. 82965ebf33SHaavard Skinnemoen * @cmd_status: Snapshot of SR taken upon completion of the current 83965ebf33SHaavard Skinnemoen * command. Only valid when EVENT_CMD_COMPLETE is pending. 84965ebf33SHaavard Skinnemoen * @data_status: Snapshot of SR taken upon completion of the current 85965ebf33SHaavard Skinnemoen * data transfer. Only valid when EVENT_DATA_COMPLETE or 86965ebf33SHaavard Skinnemoen * EVENT_DATA_ERROR is pending. 87965ebf33SHaavard Skinnemoen * @stop_cmdr: Value to be loaded into CMDR when the stop command is 88965ebf33SHaavard Skinnemoen * to be sent. 89965ebf33SHaavard Skinnemoen * @tasklet: Tasklet running the request state machine. 90965ebf33SHaavard Skinnemoen * @pending_events: Bitmask of events flagged by the interrupt handler 91965ebf33SHaavard Skinnemoen * to be processed by the tasklet. 92965ebf33SHaavard Skinnemoen * @completed_events: Bitmask of events which the state machine has 93965ebf33SHaavard Skinnemoen * processed. 94965ebf33SHaavard Skinnemoen * @state: Tasklet state. 95965ebf33SHaavard Skinnemoen * @queue: List of slots waiting for access to the controller. 96965ebf33SHaavard Skinnemoen * @need_clock_update: Update the clock rate before the next request. 97965ebf33SHaavard Skinnemoen * @need_reset: Reset controller before next request. 98965ebf33SHaavard Skinnemoen * @mode_reg: Value of the MR register. 9974791a2dSNicolas Ferre * @cfg_reg: Value of the CFG register. 100965ebf33SHaavard Skinnemoen * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus 101965ebf33SHaavard Skinnemoen * rate and timeout calculations. 102965ebf33SHaavard Skinnemoen * @mapbase: Physical address of the MMIO registers. 103965ebf33SHaavard Skinnemoen * @mck: The peripheral bus clock hooked up to the MMC controller. 104965ebf33SHaavard Skinnemoen * @pdev: Platform device associated with the MMC controller. 105965ebf33SHaavard Skinnemoen * @slot: Slots sharing this MMC controller. 106965ebf33SHaavard Skinnemoen * 107965ebf33SHaavard Skinnemoen * Locking 108965ebf33SHaavard Skinnemoen * ======= 109965ebf33SHaavard Skinnemoen * 110965ebf33SHaavard Skinnemoen * @lock is a softirq-safe spinlock protecting @queue as well as 111965ebf33SHaavard Skinnemoen * @cur_slot, @mrq and @state. These must always be updated 112965ebf33SHaavard Skinnemoen * at the same time while holding @lock. 113965ebf33SHaavard Skinnemoen * 114965ebf33SHaavard Skinnemoen * @lock also protects mode_reg and need_clock_update since these are 115965ebf33SHaavard Skinnemoen * used to synchronize mode register updates with the queue 116965ebf33SHaavard Skinnemoen * processing. 117965ebf33SHaavard Skinnemoen * 118965ebf33SHaavard Skinnemoen * The @mrq field of struct atmel_mci_slot is also protected by @lock, 119965ebf33SHaavard Skinnemoen * and must always be written at the same time as the slot is added to 120965ebf33SHaavard Skinnemoen * @queue. 121965ebf33SHaavard Skinnemoen * 122965ebf33SHaavard Skinnemoen * @pending_events and @completed_events are accessed using atomic bit 123965ebf33SHaavard Skinnemoen * operations, so they don't need any locking. 124965ebf33SHaavard Skinnemoen * 125965ebf33SHaavard Skinnemoen * None of the fields touched by the interrupt handler need any 126965ebf33SHaavard Skinnemoen * locking. However, ordering is important: Before EVENT_DATA_ERROR or 127965ebf33SHaavard Skinnemoen * EVENT_DATA_COMPLETE is set in @pending_events, all data-related 128965ebf33SHaavard Skinnemoen * interrupts must be disabled and @data_status updated with a 129965ebf33SHaavard Skinnemoen * snapshot of SR. Similarly, before EVENT_CMD_COMPLETE is set, the 130965ebf33SHaavard Skinnemoen * CMDRDY interupt must be disabled and @cmd_status updated with a 131965ebf33SHaavard Skinnemoen * snapshot of SR, and before EVENT_XFER_COMPLETE can be set, the 132965ebf33SHaavard Skinnemoen * bytes_xfered field of @data must be written. This is ensured by 133965ebf33SHaavard Skinnemoen * using barriers. 134965ebf33SHaavard Skinnemoen */ 1357d2be074SHaavard Skinnemoen struct atmel_mci { 136965ebf33SHaavard Skinnemoen spinlock_t lock; 1377d2be074SHaavard Skinnemoen void __iomem *regs; 1387d2be074SHaavard Skinnemoen 1397d2be074SHaavard Skinnemoen struct scatterlist *sg; 1407d2be074SHaavard Skinnemoen unsigned int pio_offset; 1417d2be074SHaavard Skinnemoen 142965ebf33SHaavard Skinnemoen struct atmel_mci_slot *cur_slot; 1437d2be074SHaavard Skinnemoen struct mmc_request *mrq; 1447d2be074SHaavard Skinnemoen struct mmc_command *cmd; 1457d2be074SHaavard Skinnemoen struct mmc_data *data; 1467d2be074SHaavard Skinnemoen 14765e8b083SHaavard Skinnemoen struct atmel_mci_dma dma; 14865e8b083SHaavard Skinnemoen struct dma_chan *data_chan; 14965e8b083SHaavard Skinnemoen 1507d2be074SHaavard Skinnemoen u32 cmd_status; 1517d2be074SHaavard Skinnemoen u32 data_status; 1527d2be074SHaavard Skinnemoen u32 stop_cmdr; 1537d2be074SHaavard Skinnemoen 1547d2be074SHaavard Skinnemoen struct tasklet_struct tasklet; 1557d2be074SHaavard Skinnemoen unsigned long pending_events; 1567d2be074SHaavard Skinnemoen unsigned long completed_events; 157c06ad258SHaavard Skinnemoen enum atmel_mci_state state; 158965ebf33SHaavard Skinnemoen struct list_head queue; 1597d2be074SHaavard Skinnemoen 160965ebf33SHaavard Skinnemoen bool need_clock_update; 161965ebf33SHaavard Skinnemoen bool need_reset; 162965ebf33SHaavard Skinnemoen u32 mode_reg; 16374791a2dSNicolas Ferre u32 cfg_reg; 1647d2be074SHaavard Skinnemoen unsigned long bus_hz; 1657d2be074SHaavard Skinnemoen unsigned long mapbase; 1667d2be074SHaavard Skinnemoen struct clk *mck; 1677d2be074SHaavard Skinnemoen struct platform_device *pdev; 168965ebf33SHaavard Skinnemoen 169965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot[ATMEL_MCI_MAX_NR_SLOTS]; 170965ebf33SHaavard Skinnemoen }; 171965ebf33SHaavard Skinnemoen 172965ebf33SHaavard Skinnemoen /** 173965ebf33SHaavard Skinnemoen * struct atmel_mci_slot - MMC slot state 174965ebf33SHaavard Skinnemoen * @mmc: The mmc_host representing this slot. 175965ebf33SHaavard Skinnemoen * @host: The MMC controller this slot is using. 176965ebf33SHaavard Skinnemoen * @sdc_reg: Value of SDCR to be written before using this slot. 17788ff82edSAnders Grahn * @sdio_irq: SDIO irq mask for this slot. 178965ebf33SHaavard Skinnemoen * @mrq: mmc_request currently being processed or waiting to be 179965ebf33SHaavard Skinnemoen * processed, or NULL when the slot is idle. 180965ebf33SHaavard Skinnemoen * @queue_node: List node for placing this node in the @queue list of 181965ebf33SHaavard Skinnemoen * &struct atmel_mci. 182965ebf33SHaavard Skinnemoen * @clock: Clock rate configured by set_ios(). Protected by host->lock. 183965ebf33SHaavard Skinnemoen * @flags: Random state bits associated with the slot. 184965ebf33SHaavard Skinnemoen * @detect_pin: GPIO pin used for card detection, or negative if not 185965ebf33SHaavard Skinnemoen * available. 186965ebf33SHaavard Skinnemoen * @wp_pin: GPIO pin used for card write protect sending, or negative 187965ebf33SHaavard Skinnemoen * if not available. 1881c1452beSJonas Larsson * @detect_is_active_high: The state of the detect pin when it is active. 189965ebf33SHaavard Skinnemoen * @detect_timer: Timer used for debouncing @detect_pin interrupts. 190965ebf33SHaavard Skinnemoen */ 191965ebf33SHaavard Skinnemoen struct atmel_mci_slot { 192965ebf33SHaavard Skinnemoen struct mmc_host *mmc; 193965ebf33SHaavard Skinnemoen struct atmel_mci *host; 194965ebf33SHaavard Skinnemoen 195965ebf33SHaavard Skinnemoen u32 sdc_reg; 19688ff82edSAnders Grahn u32 sdio_irq; 197965ebf33SHaavard Skinnemoen 198965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 199965ebf33SHaavard Skinnemoen struct list_head queue_node; 200965ebf33SHaavard Skinnemoen 201965ebf33SHaavard Skinnemoen unsigned int clock; 202965ebf33SHaavard Skinnemoen unsigned long flags; 203965ebf33SHaavard Skinnemoen #define ATMCI_CARD_PRESENT 0 204965ebf33SHaavard Skinnemoen #define ATMCI_CARD_NEED_INIT 1 205965ebf33SHaavard Skinnemoen #define ATMCI_SHUTDOWN 2 206965ebf33SHaavard Skinnemoen 207965ebf33SHaavard Skinnemoen int detect_pin; 208965ebf33SHaavard Skinnemoen int wp_pin; 2091c1452beSJonas Larsson bool detect_is_active_high; 210965ebf33SHaavard Skinnemoen 211965ebf33SHaavard Skinnemoen struct timer_list detect_timer; 2127d2be074SHaavard Skinnemoen }; 2137d2be074SHaavard Skinnemoen 2147d2be074SHaavard Skinnemoen #define atmci_test_and_clear_pending(host, event) \ 2157d2be074SHaavard Skinnemoen test_and_clear_bit(event, &host->pending_events) 2167d2be074SHaavard Skinnemoen #define atmci_set_completed(host, event) \ 2177d2be074SHaavard Skinnemoen set_bit(event, &host->completed_events) 2187d2be074SHaavard Skinnemoen #define atmci_set_pending(host, event) \ 2197d2be074SHaavard Skinnemoen set_bit(event, &host->pending_events) 2207d2be074SHaavard Skinnemoen 221deec9ae3SHaavard Skinnemoen /* 22204d699c3SRob Emanuele * Enable or disable features/registers based on 22304d699c3SRob Emanuele * whether the processor supports them 22404d699c3SRob Emanuele */ 22504d699c3SRob Emanuele static bool mci_has_rwproof(void) 22604d699c3SRob Emanuele { 22704d699c3SRob Emanuele if (cpu_is_at91sam9261() || cpu_is_at91rm9200()) 22804d699c3SRob Emanuele return false; 22904d699c3SRob Emanuele else 23004d699c3SRob Emanuele return true; 23104d699c3SRob Emanuele } 23204d699c3SRob Emanuele 23304d699c3SRob Emanuele /* 23474791a2dSNicolas Ferre * The new MCI2 module isn't 100% compatible with the old MCI module, 23574791a2dSNicolas Ferre * and it has a few nice features which we want to use... 23674791a2dSNicolas Ferre */ 23774791a2dSNicolas Ferre static inline bool atmci_is_mci2(void) 23874791a2dSNicolas Ferre { 23974791a2dSNicolas Ferre if (cpu_is_at91sam9g45()) 24074791a2dSNicolas Ferre return true; 24174791a2dSNicolas Ferre 24274791a2dSNicolas Ferre return false; 24374791a2dSNicolas Ferre } 24474791a2dSNicolas Ferre 24574791a2dSNicolas Ferre 24674791a2dSNicolas Ferre /* 247deec9ae3SHaavard Skinnemoen * The debugfs stuff below is mostly optimized away when 248deec9ae3SHaavard Skinnemoen * CONFIG_DEBUG_FS is not set. 249deec9ae3SHaavard Skinnemoen */ 250deec9ae3SHaavard Skinnemoen static int atmci_req_show(struct seq_file *s, void *v) 251deec9ae3SHaavard Skinnemoen { 252965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = s->private; 253965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 254deec9ae3SHaavard Skinnemoen struct mmc_command *cmd; 255deec9ae3SHaavard Skinnemoen struct mmc_command *stop; 256deec9ae3SHaavard Skinnemoen struct mmc_data *data; 257deec9ae3SHaavard Skinnemoen 258deec9ae3SHaavard Skinnemoen /* Make sure we get a consistent snapshot */ 259965ebf33SHaavard Skinnemoen spin_lock_bh(&slot->host->lock); 260965ebf33SHaavard Skinnemoen mrq = slot->mrq; 261deec9ae3SHaavard Skinnemoen 262deec9ae3SHaavard Skinnemoen if (mrq) { 263deec9ae3SHaavard Skinnemoen cmd = mrq->cmd; 264deec9ae3SHaavard Skinnemoen data = mrq->data; 265deec9ae3SHaavard Skinnemoen stop = mrq->stop; 266deec9ae3SHaavard Skinnemoen 267deec9ae3SHaavard Skinnemoen if (cmd) 268deec9ae3SHaavard Skinnemoen seq_printf(s, 269deec9ae3SHaavard Skinnemoen "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 270deec9ae3SHaavard Skinnemoen cmd->opcode, cmd->arg, cmd->flags, 271deec9ae3SHaavard Skinnemoen cmd->resp[0], cmd->resp[1], cmd->resp[2], 272d586ebbbSNicolas Ferre cmd->resp[3], cmd->error); 273deec9ae3SHaavard Skinnemoen if (data) 274deec9ae3SHaavard Skinnemoen seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", 275deec9ae3SHaavard Skinnemoen data->bytes_xfered, data->blocks, 276deec9ae3SHaavard Skinnemoen data->blksz, data->flags, data->error); 277deec9ae3SHaavard Skinnemoen if (stop) 278deec9ae3SHaavard Skinnemoen seq_printf(s, 279deec9ae3SHaavard Skinnemoen "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 280deec9ae3SHaavard Skinnemoen stop->opcode, stop->arg, stop->flags, 281deec9ae3SHaavard Skinnemoen stop->resp[0], stop->resp[1], stop->resp[2], 282d586ebbbSNicolas Ferre stop->resp[3], stop->error); 283deec9ae3SHaavard Skinnemoen } 284deec9ae3SHaavard Skinnemoen 285965ebf33SHaavard Skinnemoen spin_unlock_bh(&slot->host->lock); 286deec9ae3SHaavard Skinnemoen 287deec9ae3SHaavard Skinnemoen return 0; 288deec9ae3SHaavard Skinnemoen } 289deec9ae3SHaavard Skinnemoen 290deec9ae3SHaavard Skinnemoen static int atmci_req_open(struct inode *inode, struct file *file) 291deec9ae3SHaavard Skinnemoen { 292deec9ae3SHaavard Skinnemoen return single_open(file, atmci_req_show, inode->i_private); 293deec9ae3SHaavard Skinnemoen } 294deec9ae3SHaavard Skinnemoen 295deec9ae3SHaavard Skinnemoen static const struct file_operations atmci_req_fops = { 296deec9ae3SHaavard Skinnemoen .owner = THIS_MODULE, 297deec9ae3SHaavard Skinnemoen .open = atmci_req_open, 298deec9ae3SHaavard Skinnemoen .read = seq_read, 299deec9ae3SHaavard Skinnemoen .llseek = seq_lseek, 300deec9ae3SHaavard Skinnemoen .release = single_release, 301deec9ae3SHaavard Skinnemoen }; 302deec9ae3SHaavard Skinnemoen 303deec9ae3SHaavard Skinnemoen static void atmci_show_status_reg(struct seq_file *s, 304deec9ae3SHaavard Skinnemoen const char *regname, u32 value) 305deec9ae3SHaavard Skinnemoen { 306deec9ae3SHaavard Skinnemoen static const char *sr_bit[] = { 307deec9ae3SHaavard Skinnemoen [0] = "CMDRDY", 308deec9ae3SHaavard Skinnemoen [1] = "RXRDY", 309deec9ae3SHaavard Skinnemoen [2] = "TXRDY", 310deec9ae3SHaavard Skinnemoen [3] = "BLKE", 311deec9ae3SHaavard Skinnemoen [4] = "DTIP", 312deec9ae3SHaavard Skinnemoen [5] = "NOTBUSY", 31304d699c3SRob Emanuele [6] = "ENDRX", 31404d699c3SRob Emanuele [7] = "ENDTX", 315deec9ae3SHaavard Skinnemoen [8] = "SDIOIRQA", 316deec9ae3SHaavard Skinnemoen [9] = "SDIOIRQB", 31704d699c3SRob Emanuele [12] = "SDIOWAIT", 31804d699c3SRob Emanuele [14] = "RXBUFF", 31904d699c3SRob Emanuele [15] = "TXBUFE", 320deec9ae3SHaavard Skinnemoen [16] = "RINDE", 321deec9ae3SHaavard Skinnemoen [17] = "RDIRE", 322deec9ae3SHaavard Skinnemoen [18] = "RCRCE", 323deec9ae3SHaavard Skinnemoen [19] = "RENDE", 324deec9ae3SHaavard Skinnemoen [20] = "RTOE", 325deec9ae3SHaavard Skinnemoen [21] = "DCRCE", 326deec9ae3SHaavard Skinnemoen [22] = "DTOE", 32704d699c3SRob Emanuele [23] = "CSTOE", 32804d699c3SRob Emanuele [24] = "BLKOVRE", 32904d699c3SRob Emanuele [25] = "DMADONE", 33004d699c3SRob Emanuele [26] = "FIFOEMPTY", 33104d699c3SRob Emanuele [27] = "XFRDONE", 332deec9ae3SHaavard Skinnemoen [30] = "OVRE", 333deec9ae3SHaavard Skinnemoen [31] = "UNRE", 334deec9ae3SHaavard Skinnemoen }; 335deec9ae3SHaavard Skinnemoen unsigned int i; 336deec9ae3SHaavard Skinnemoen 337deec9ae3SHaavard Skinnemoen seq_printf(s, "%s:\t0x%08x", regname, value); 338deec9ae3SHaavard Skinnemoen for (i = 0; i < ARRAY_SIZE(sr_bit); i++) { 339deec9ae3SHaavard Skinnemoen if (value & (1 << i)) { 340deec9ae3SHaavard Skinnemoen if (sr_bit[i]) 341deec9ae3SHaavard Skinnemoen seq_printf(s, " %s", sr_bit[i]); 342deec9ae3SHaavard Skinnemoen else 343deec9ae3SHaavard Skinnemoen seq_puts(s, " UNKNOWN"); 344deec9ae3SHaavard Skinnemoen } 345deec9ae3SHaavard Skinnemoen } 346deec9ae3SHaavard Skinnemoen seq_putc(s, '\n'); 347deec9ae3SHaavard Skinnemoen } 348deec9ae3SHaavard Skinnemoen 349deec9ae3SHaavard Skinnemoen static int atmci_regs_show(struct seq_file *s, void *v) 350deec9ae3SHaavard Skinnemoen { 351deec9ae3SHaavard Skinnemoen struct atmel_mci *host = s->private; 352deec9ae3SHaavard Skinnemoen u32 *buf; 353deec9ae3SHaavard Skinnemoen 354deec9ae3SHaavard Skinnemoen buf = kmalloc(MCI_REGS_SIZE, GFP_KERNEL); 355deec9ae3SHaavard Skinnemoen if (!buf) 356deec9ae3SHaavard Skinnemoen return -ENOMEM; 357deec9ae3SHaavard Skinnemoen 358965ebf33SHaavard Skinnemoen /* 359965ebf33SHaavard Skinnemoen * Grab a more or less consistent snapshot. Note that we're 360965ebf33SHaavard Skinnemoen * not disabling interrupts, so IMR and SR may not be 361965ebf33SHaavard Skinnemoen * consistent. 362965ebf33SHaavard Skinnemoen */ 363965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 36487e60f2bSHaavard Skinnemoen clk_enable(host->mck); 365deec9ae3SHaavard Skinnemoen memcpy_fromio(buf, host->regs, MCI_REGS_SIZE); 36687e60f2bSHaavard Skinnemoen clk_disable(host->mck); 367965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 368deec9ae3SHaavard Skinnemoen 369deec9ae3SHaavard Skinnemoen seq_printf(s, "MR:\t0x%08x%s%s CLKDIV=%u\n", 370deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4], 371deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4] & MCI_MR_RDPROOF ? " RDPROOF" : "", 372deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4] & MCI_MR_WRPROOF ? " WRPROOF" : "", 373deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4] & 0xff); 374deec9ae3SHaavard Skinnemoen seq_printf(s, "DTOR:\t0x%08x\n", buf[MCI_DTOR / 4]); 375deec9ae3SHaavard Skinnemoen seq_printf(s, "SDCR:\t0x%08x\n", buf[MCI_SDCR / 4]); 376deec9ae3SHaavard Skinnemoen seq_printf(s, "ARGR:\t0x%08x\n", buf[MCI_ARGR / 4]); 377deec9ae3SHaavard Skinnemoen seq_printf(s, "BLKR:\t0x%08x BCNT=%u BLKLEN=%u\n", 378deec9ae3SHaavard Skinnemoen buf[MCI_BLKR / 4], 379deec9ae3SHaavard Skinnemoen buf[MCI_BLKR / 4] & 0xffff, 380deec9ae3SHaavard Skinnemoen (buf[MCI_BLKR / 4] >> 16) & 0xffff); 38174791a2dSNicolas Ferre if (atmci_is_mci2()) 38274791a2dSNicolas Ferre seq_printf(s, "CSTOR:\t0x%08x\n", buf[MCI_CSTOR / 4]); 383deec9ae3SHaavard Skinnemoen 384deec9ae3SHaavard Skinnemoen /* Don't read RSPR and RDR; it will consume the data there */ 385deec9ae3SHaavard Skinnemoen 386deec9ae3SHaavard Skinnemoen atmci_show_status_reg(s, "SR", buf[MCI_SR / 4]); 387deec9ae3SHaavard Skinnemoen atmci_show_status_reg(s, "IMR", buf[MCI_IMR / 4]); 388deec9ae3SHaavard Skinnemoen 38974791a2dSNicolas Ferre if (atmci_is_mci2()) { 39074791a2dSNicolas Ferre u32 val; 39174791a2dSNicolas Ferre 39274791a2dSNicolas Ferre val = buf[MCI_DMA / 4]; 39374791a2dSNicolas Ferre seq_printf(s, "DMA:\t0x%08x OFFSET=%u CHKSIZE=%u%s\n", 39474791a2dSNicolas Ferre val, val & 3, 39574791a2dSNicolas Ferre ((val >> 4) & 3) ? 39674791a2dSNicolas Ferre 1 << (((val >> 4) & 3) + 1) : 1, 39774791a2dSNicolas Ferre val & MCI_DMAEN ? " DMAEN" : ""); 39874791a2dSNicolas Ferre 39974791a2dSNicolas Ferre val = buf[MCI_CFG / 4]; 40074791a2dSNicolas Ferre seq_printf(s, "CFG:\t0x%08x%s%s%s%s\n", 40174791a2dSNicolas Ferre val, 40274791a2dSNicolas Ferre val & MCI_CFG_FIFOMODE_1DATA ? " FIFOMODE_ONE_DATA" : "", 40374791a2dSNicolas Ferre val & MCI_CFG_FERRCTRL_COR ? " FERRCTRL_CLEAR_ON_READ" : "", 40474791a2dSNicolas Ferre val & MCI_CFG_HSMODE ? " HSMODE" : "", 40574791a2dSNicolas Ferre val & MCI_CFG_LSYNC ? " LSYNC" : ""); 40674791a2dSNicolas Ferre } 40774791a2dSNicolas Ferre 408b17339a1SHaavard Skinnemoen kfree(buf); 409b17339a1SHaavard Skinnemoen 410deec9ae3SHaavard Skinnemoen return 0; 411deec9ae3SHaavard Skinnemoen } 412deec9ae3SHaavard Skinnemoen 413deec9ae3SHaavard Skinnemoen static int atmci_regs_open(struct inode *inode, struct file *file) 414deec9ae3SHaavard Skinnemoen { 415deec9ae3SHaavard Skinnemoen return single_open(file, atmci_regs_show, inode->i_private); 416deec9ae3SHaavard Skinnemoen } 417deec9ae3SHaavard Skinnemoen 418deec9ae3SHaavard Skinnemoen static const struct file_operations atmci_regs_fops = { 419deec9ae3SHaavard Skinnemoen .owner = THIS_MODULE, 420deec9ae3SHaavard Skinnemoen .open = atmci_regs_open, 421deec9ae3SHaavard Skinnemoen .read = seq_read, 422deec9ae3SHaavard Skinnemoen .llseek = seq_lseek, 423deec9ae3SHaavard Skinnemoen .release = single_release, 424deec9ae3SHaavard Skinnemoen }; 425deec9ae3SHaavard Skinnemoen 426965ebf33SHaavard Skinnemoen static void atmci_init_debugfs(struct atmel_mci_slot *slot) 427deec9ae3SHaavard Skinnemoen { 428965ebf33SHaavard Skinnemoen struct mmc_host *mmc = slot->mmc; 429965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 430deec9ae3SHaavard Skinnemoen struct dentry *root; 431deec9ae3SHaavard Skinnemoen struct dentry *node; 432deec9ae3SHaavard Skinnemoen 433deec9ae3SHaavard Skinnemoen root = mmc->debugfs_root; 434deec9ae3SHaavard Skinnemoen if (!root) 435deec9ae3SHaavard Skinnemoen return; 436deec9ae3SHaavard Skinnemoen 437deec9ae3SHaavard Skinnemoen node = debugfs_create_file("regs", S_IRUSR, root, host, 438deec9ae3SHaavard Skinnemoen &atmci_regs_fops); 439deec9ae3SHaavard Skinnemoen if (IS_ERR(node)) 440deec9ae3SHaavard Skinnemoen return; 441deec9ae3SHaavard Skinnemoen if (!node) 442deec9ae3SHaavard Skinnemoen goto err; 443deec9ae3SHaavard Skinnemoen 444965ebf33SHaavard Skinnemoen node = debugfs_create_file("req", S_IRUSR, root, slot, &atmci_req_fops); 445deec9ae3SHaavard Skinnemoen if (!node) 446deec9ae3SHaavard Skinnemoen goto err; 447deec9ae3SHaavard Skinnemoen 448c06ad258SHaavard Skinnemoen node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); 449c06ad258SHaavard Skinnemoen if (!node) 450c06ad258SHaavard Skinnemoen goto err; 451c06ad258SHaavard Skinnemoen 452deec9ae3SHaavard Skinnemoen node = debugfs_create_x32("pending_events", S_IRUSR, root, 453deec9ae3SHaavard Skinnemoen (u32 *)&host->pending_events); 454deec9ae3SHaavard Skinnemoen if (!node) 455deec9ae3SHaavard Skinnemoen goto err; 456deec9ae3SHaavard Skinnemoen 457deec9ae3SHaavard Skinnemoen node = debugfs_create_x32("completed_events", S_IRUSR, root, 458deec9ae3SHaavard Skinnemoen (u32 *)&host->completed_events); 459deec9ae3SHaavard Skinnemoen if (!node) 460deec9ae3SHaavard Skinnemoen goto err; 461deec9ae3SHaavard Skinnemoen 462deec9ae3SHaavard Skinnemoen return; 463deec9ae3SHaavard Skinnemoen 464deec9ae3SHaavard Skinnemoen err: 465965ebf33SHaavard Skinnemoen dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); 466deec9ae3SHaavard Skinnemoen } 4677d2be074SHaavard Skinnemoen 4687d2be074SHaavard Skinnemoen static inline unsigned int ns_to_clocks(struct atmel_mci *host, 4697d2be074SHaavard Skinnemoen unsigned int ns) 4707d2be074SHaavard Skinnemoen { 4717d2be074SHaavard Skinnemoen return (ns * (host->bus_hz / 1000000) + 999) / 1000; 4727d2be074SHaavard Skinnemoen } 4737d2be074SHaavard Skinnemoen 4747d2be074SHaavard Skinnemoen static void atmci_set_timeout(struct atmel_mci *host, 475965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot, struct mmc_data *data) 4767d2be074SHaavard Skinnemoen { 4777d2be074SHaavard Skinnemoen static unsigned dtomul_to_shift[] = { 4787d2be074SHaavard Skinnemoen 0, 4, 7, 8, 10, 12, 16, 20 4797d2be074SHaavard Skinnemoen }; 4807d2be074SHaavard Skinnemoen unsigned timeout; 4817d2be074SHaavard Skinnemoen unsigned dtocyc; 4827d2be074SHaavard Skinnemoen unsigned dtomul; 4837d2be074SHaavard Skinnemoen 4847d2be074SHaavard Skinnemoen timeout = ns_to_clocks(host, data->timeout_ns) + data->timeout_clks; 4857d2be074SHaavard Skinnemoen 4867d2be074SHaavard Skinnemoen for (dtomul = 0; dtomul < 8; dtomul++) { 4877d2be074SHaavard Skinnemoen unsigned shift = dtomul_to_shift[dtomul]; 4887d2be074SHaavard Skinnemoen dtocyc = (timeout + (1 << shift) - 1) >> shift; 4897d2be074SHaavard Skinnemoen if (dtocyc < 15) 4907d2be074SHaavard Skinnemoen break; 4917d2be074SHaavard Skinnemoen } 4927d2be074SHaavard Skinnemoen 4937d2be074SHaavard Skinnemoen if (dtomul >= 8) { 4947d2be074SHaavard Skinnemoen dtomul = 7; 4957d2be074SHaavard Skinnemoen dtocyc = 15; 4967d2be074SHaavard Skinnemoen } 4977d2be074SHaavard Skinnemoen 498965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "setting timeout to %u cycles\n", 4997d2be074SHaavard Skinnemoen dtocyc << dtomul_to_shift[dtomul]); 5007d2be074SHaavard Skinnemoen mci_writel(host, DTOR, (MCI_DTOMUL(dtomul) | MCI_DTOCYC(dtocyc))); 5017d2be074SHaavard Skinnemoen } 5027d2be074SHaavard Skinnemoen 5037d2be074SHaavard Skinnemoen /* 5047d2be074SHaavard Skinnemoen * Return mask with command flags to be enabled for this command. 5057d2be074SHaavard Skinnemoen */ 5067d2be074SHaavard Skinnemoen static u32 atmci_prepare_command(struct mmc_host *mmc, 5077d2be074SHaavard Skinnemoen struct mmc_command *cmd) 5087d2be074SHaavard Skinnemoen { 5097d2be074SHaavard Skinnemoen struct mmc_data *data; 5107d2be074SHaavard Skinnemoen u32 cmdr; 5117d2be074SHaavard Skinnemoen 5127d2be074SHaavard Skinnemoen cmd->error = -EINPROGRESS; 5137d2be074SHaavard Skinnemoen 5147d2be074SHaavard Skinnemoen cmdr = MCI_CMDR_CMDNB(cmd->opcode); 5157d2be074SHaavard Skinnemoen 5167d2be074SHaavard Skinnemoen if (cmd->flags & MMC_RSP_PRESENT) { 5177d2be074SHaavard Skinnemoen if (cmd->flags & MMC_RSP_136) 5187d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_RSPTYP_136BIT; 5197d2be074SHaavard Skinnemoen else 5207d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_RSPTYP_48BIT; 5217d2be074SHaavard Skinnemoen } 5227d2be074SHaavard Skinnemoen 5237d2be074SHaavard Skinnemoen /* 5247d2be074SHaavard Skinnemoen * This should really be MAXLAT_5 for CMD2 and ACMD41, but 5257d2be074SHaavard Skinnemoen * it's too difficult to determine whether this is an ACMD or 5267d2be074SHaavard Skinnemoen * not. Better make it 64. 5277d2be074SHaavard Skinnemoen */ 5287d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_MAXLAT_64CYC; 5297d2be074SHaavard Skinnemoen 5307d2be074SHaavard Skinnemoen if (mmc->ios.bus_mode == MMC_BUSMODE_OPENDRAIN) 5317d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_OPDCMD; 5327d2be074SHaavard Skinnemoen 5337d2be074SHaavard Skinnemoen data = cmd->data; 5347d2be074SHaavard Skinnemoen if (data) { 5357d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_START_XFER; 5362f1d7918SNicolas Ferre 5372f1d7918SNicolas Ferre if (cmd->opcode == SD_IO_RW_EXTENDED) { 5382f1d7918SNicolas Ferre cmdr |= MCI_CMDR_SDIO_BLOCK; 5392f1d7918SNicolas Ferre } else { 5407d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_STREAM) 5417d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_STREAM; 5427d2be074SHaavard Skinnemoen else if (data->blocks > 1) 5437d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_MULTI_BLOCK; 5447d2be074SHaavard Skinnemoen else 5457d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_BLOCK; 5462f1d7918SNicolas Ferre } 5477d2be074SHaavard Skinnemoen 5487d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 5497d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_TRDIR_READ; 5507d2be074SHaavard Skinnemoen } 5517d2be074SHaavard Skinnemoen 5527d2be074SHaavard Skinnemoen return cmdr; 5537d2be074SHaavard Skinnemoen } 5547d2be074SHaavard Skinnemoen 5557d2be074SHaavard Skinnemoen static void atmci_start_command(struct atmel_mci *host, 556965ebf33SHaavard Skinnemoen struct mmc_command *cmd, u32 cmd_flags) 5577d2be074SHaavard Skinnemoen { 5587d2be074SHaavard Skinnemoen WARN_ON(host->cmd); 5597d2be074SHaavard Skinnemoen host->cmd = cmd; 5607d2be074SHaavard Skinnemoen 561965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, 5627d2be074SHaavard Skinnemoen "start command: ARGR=0x%08x CMDR=0x%08x\n", 5637d2be074SHaavard Skinnemoen cmd->arg, cmd_flags); 5647d2be074SHaavard Skinnemoen 5657d2be074SHaavard Skinnemoen mci_writel(host, ARGR, cmd->arg); 5667d2be074SHaavard Skinnemoen mci_writel(host, CMDR, cmd_flags); 5677d2be074SHaavard Skinnemoen } 5687d2be074SHaavard Skinnemoen 569965ebf33SHaavard Skinnemoen static void send_stop_cmd(struct atmel_mci *host, struct mmc_data *data) 5707d2be074SHaavard Skinnemoen { 5717d2be074SHaavard Skinnemoen atmci_start_command(host, data->stop, host->stop_cmdr); 5727d2be074SHaavard Skinnemoen mci_writel(host, IER, MCI_CMDRDY); 5737d2be074SHaavard Skinnemoen } 5747d2be074SHaavard Skinnemoen 57565e8b083SHaavard Skinnemoen #ifdef CONFIG_MMC_ATMELMCI_DMA 57665e8b083SHaavard Skinnemoen static void atmci_dma_cleanup(struct atmel_mci *host) 57765e8b083SHaavard Skinnemoen { 57865e8b083SHaavard Skinnemoen struct mmc_data *data = host->data; 57965e8b083SHaavard Skinnemoen 580009a891bSNicolas Ferre if (data) 581266ac3f2SLinus Walleij dma_unmap_sg(host->dma.chan->device->dev, 582266ac3f2SLinus Walleij data->sg, data->sg_len, 58365e8b083SHaavard Skinnemoen ((data->flags & MMC_DATA_WRITE) 58465e8b083SHaavard Skinnemoen ? DMA_TO_DEVICE : DMA_FROM_DEVICE)); 58565e8b083SHaavard Skinnemoen } 58665e8b083SHaavard Skinnemoen 58765e8b083SHaavard Skinnemoen static void atmci_stop_dma(struct atmel_mci *host) 58865e8b083SHaavard Skinnemoen { 58965e8b083SHaavard Skinnemoen struct dma_chan *chan = host->data_chan; 59065e8b083SHaavard Skinnemoen 59165e8b083SHaavard Skinnemoen if (chan) { 59205827630SLinus Walleij chan->device->device_control(chan, DMA_TERMINATE_ALL, 0); 59365e8b083SHaavard Skinnemoen atmci_dma_cleanup(host); 59465e8b083SHaavard Skinnemoen } else { 59565e8b083SHaavard Skinnemoen /* Data transfer was stopped by the interrupt handler */ 59665e8b083SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 59765e8b083SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 59865e8b083SHaavard Skinnemoen } 59965e8b083SHaavard Skinnemoen } 60065e8b083SHaavard Skinnemoen 60165e8b083SHaavard Skinnemoen /* This function is called by the DMA driver from tasklet context. */ 60265e8b083SHaavard Skinnemoen static void atmci_dma_complete(void *arg) 60365e8b083SHaavard Skinnemoen { 60465e8b083SHaavard Skinnemoen struct atmel_mci *host = arg; 60565e8b083SHaavard Skinnemoen struct mmc_data *data = host->data; 60665e8b083SHaavard Skinnemoen 60765e8b083SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "DMA complete\n"); 60865e8b083SHaavard Skinnemoen 60974791a2dSNicolas Ferre if (atmci_is_mci2()) 61074791a2dSNicolas Ferre /* Disable DMA hardware handshaking on MCI */ 61174791a2dSNicolas Ferre mci_writel(host, DMA, mci_readl(host, DMA) & ~MCI_DMAEN); 61274791a2dSNicolas Ferre 61365e8b083SHaavard Skinnemoen atmci_dma_cleanup(host); 61465e8b083SHaavard Skinnemoen 61565e8b083SHaavard Skinnemoen /* 61665e8b083SHaavard Skinnemoen * If the card was removed, data will be NULL. No point trying 61765e8b083SHaavard Skinnemoen * to send the stop command or waiting for NBUSY in this case. 61865e8b083SHaavard Skinnemoen */ 61965e8b083SHaavard Skinnemoen if (data) { 62065e8b083SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 62165e8b083SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 62265e8b083SHaavard Skinnemoen 62365e8b083SHaavard Skinnemoen /* 62465e8b083SHaavard Skinnemoen * Regardless of what the documentation says, we have 62565e8b083SHaavard Skinnemoen * to wait for NOTBUSY even after block read 62665e8b083SHaavard Skinnemoen * operations. 62765e8b083SHaavard Skinnemoen * 62865e8b083SHaavard Skinnemoen * When the DMA transfer is complete, the controller 62965e8b083SHaavard Skinnemoen * may still be reading the CRC from the card, i.e. 63065e8b083SHaavard Skinnemoen * the data transfer is still in progress and we 63165e8b083SHaavard Skinnemoen * haven't seen all the potential error bits yet. 63265e8b083SHaavard Skinnemoen * 63365e8b083SHaavard Skinnemoen * The interrupt handler will schedule a different 63465e8b083SHaavard Skinnemoen * tasklet to finish things up when the data transfer 63565e8b083SHaavard Skinnemoen * is completely done. 63665e8b083SHaavard Skinnemoen * 63765e8b083SHaavard Skinnemoen * We may not complete the mmc request here anyway 63865e8b083SHaavard Skinnemoen * because the mmc layer may call back and cause us to 63965e8b083SHaavard Skinnemoen * violate the "don't submit new operations from the 64065e8b083SHaavard Skinnemoen * completion callback" rule of the dma engine 64165e8b083SHaavard Skinnemoen * framework. 64265e8b083SHaavard Skinnemoen */ 64365e8b083SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 64465e8b083SHaavard Skinnemoen } 64565e8b083SHaavard Skinnemoen } 64665e8b083SHaavard Skinnemoen 64765e8b083SHaavard Skinnemoen static int 64874791a2dSNicolas Ferre atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data) 64965e8b083SHaavard Skinnemoen { 65065e8b083SHaavard Skinnemoen struct dma_chan *chan; 65165e8b083SHaavard Skinnemoen struct dma_async_tx_descriptor *desc; 65265e8b083SHaavard Skinnemoen struct scatterlist *sg; 65365e8b083SHaavard Skinnemoen unsigned int i; 65465e8b083SHaavard Skinnemoen enum dma_data_direction direction; 655657a77faSAtsushi Nemoto unsigned int sglen; 65665e8b083SHaavard Skinnemoen 65765e8b083SHaavard Skinnemoen /* 65865e8b083SHaavard Skinnemoen * We don't do DMA on "complex" transfers, i.e. with 65965e8b083SHaavard Skinnemoen * non-word-aligned buffers or lengths. Also, we don't bother 66065e8b083SHaavard Skinnemoen * with all the DMA setup overhead for short transfers. 66165e8b083SHaavard Skinnemoen */ 66265e8b083SHaavard Skinnemoen if (data->blocks * data->blksz < ATMCI_DMA_THRESHOLD) 66365e8b083SHaavard Skinnemoen return -EINVAL; 66465e8b083SHaavard Skinnemoen if (data->blksz & 3) 66565e8b083SHaavard Skinnemoen return -EINVAL; 66665e8b083SHaavard Skinnemoen 66765e8b083SHaavard Skinnemoen for_each_sg(data->sg, sg, data->sg_len, i) { 66865e8b083SHaavard Skinnemoen if (sg->offset & 3 || sg->length & 3) 66965e8b083SHaavard Skinnemoen return -EINVAL; 67065e8b083SHaavard Skinnemoen } 67165e8b083SHaavard Skinnemoen 67265e8b083SHaavard Skinnemoen /* If we don't have a channel, we can't do DMA */ 67365e8b083SHaavard Skinnemoen chan = host->dma.chan; 6746f49a57aSDan Williams if (chan) 67565e8b083SHaavard Skinnemoen host->data_chan = chan; 67665e8b083SHaavard Skinnemoen 67765e8b083SHaavard Skinnemoen if (!chan) 67865e8b083SHaavard Skinnemoen return -ENODEV; 67965e8b083SHaavard Skinnemoen 68074791a2dSNicolas Ferre if (atmci_is_mci2()) 68174791a2dSNicolas Ferre mci_writel(host, DMA, MCI_DMA_CHKSIZE(3) | MCI_DMAEN); 68274791a2dSNicolas Ferre 68365e8b083SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 68465e8b083SHaavard Skinnemoen direction = DMA_FROM_DEVICE; 68565e8b083SHaavard Skinnemoen else 68665e8b083SHaavard Skinnemoen direction = DMA_TO_DEVICE; 68765e8b083SHaavard Skinnemoen 688266ac3f2SLinus Walleij sglen = dma_map_sg(chan->device->dev, data->sg, 689266ac3f2SLinus Walleij data->sg_len, direction); 690657a77faSAtsushi Nemoto if (sglen != data->sg_len) 691657a77faSAtsushi Nemoto goto unmap_exit; 69265e8b083SHaavard Skinnemoen desc = chan->device->device_prep_slave_sg(chan, 69365e8b083SHaavard Skinnemoen data->sg, data->sg_len, direction, 69465e8b083SHaavard Skinnemoen DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 69565e8b083SHaavard Skinnemoen if (!desc) 696657a77faSAtsushi Nemoto goto unmap_exit; 69765e8b083SHaavard Skinnemoen 69865e8b083SHaavard Skinnemoen host->dma.data_desc = desc; 69965e8b083SHaavard Skinnemoen desc->callback = atmci_dma_complete; 70065e8b083SHaavard Skinnemoen desc->callback_param = host; 70165e8b083SHaavard Skinnemoen 70265e8b083SHaavard Skinnemoen return 0; 703657a77faSAtsushi Nemoto unmap_exit: 704266ac3f2SLinus Walleij dma_unmap_sg(chan->device->dev, data->sg, sglen, direction); 705657a77faSAtsushi Nemoto return -ENOMEM; 70665e8b083SHaavard Skinnemoen } 70765e8b083SHaavard Skinnemoen 70874791a2dSNicolas Ferre static void atmci_submit_data(struct atmel_mci *host) 70974791a2dSNicolas Ferre { 71074791a2dSNicolas Ferre struct dma_chan *chan = host->data_chan; 71174791a2dSNicolas Ferre struct dma_async_tx_descriptor *desc = host->dma.data_desc; 71274791a2dSNicolas Ferre 71374791a2dSNicolas Ferre if (chan) { 71474791a2dSNicolas Ferre desc->tx_submit(desc); 71574791a2dSNicolas Ferre chan->device->device_issue_pending(chan); 71674791a2dSNicolas Ferre } 71774791a2dSNicolas Ferre } 71874791a2dSNicolas Ferre 71965e8b083SHaavard Skinnemoen #else /* CONFIG_MMC_ATMELMCI_DMA */ 72065e8b083SHaavard Skinnemoen 72174791a2dSNicolas Ferre static int atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data) 72265e8b083SHaavard Skinnemoen { 72365e8b083SHaavard Skinnemoen return -ENOSYS; 72465e8b083SHaavard Skinnemoen } 72565e8b083SHaavard Skinnemoen 72674791a2dSNicolas Ferre static void atmci_submit_data(struct atmel_mci *host) {} 72774791a2dSNicolas Ferre 72865e8b083SHaavard Skinnemoen static void atmci_stop_dma(struct atmel_mci *host) 72965e8b083SHaavard Skinnemoen { 73065e8b083SHaavard Skinnemoen /* Data transfer was stopped by the interrupt handler */ 73165e8b083SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 73265e8b083SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 73365e8b083SHaavard Skinnemoen } 73465e8b083SHaavard Skinnemoen 73565e8b083SHaavard Skinnemoen #endif /* CONFIG_MMC_ATMELMCI_DMA */ 73665e8b083SHaavard Skinnemoen 7377d2be074SHaavard Skinnemoen /* 7387d2be074SHaavard Skinnemoen * Returns a mask of interrupt flags to be enabled after the whole 7397d2be074SHaavard Skinnemoen * request has been prepared. 7407d2be074SHaavard Skinnemoen */ 74174791a2dSNicolas Ferre static u32 atmci_prepare_data(struct atmel_mci *host, struct mmc_data *data) 7427d2be074SHaavard Skinnemoen { 7437d2be074SHaavard Skinnemoen u32 iflags; 7447d2be074SHaavard Skinnemoen 7457d2be074SHaavard Skinnemoen data->error = -EINPROGRESS; 7467d2be074SHaavard Skinnemoen 7477d2be074SHaavard Skinnemoen WARN_ON(host->data); 7487d2be074SHaavard Skinnemoen host->sg = NULL; 7497d2be074SHaavard Skinnemoen host->data = data; 7507d2be074SHaavard Skinnemoen 7517d2be074SHaavard Skinnemoen iflags = ATMCI_DATA_ERROR_FLAGS; 75274791a2dSNicolas Ferre if (atmci_prepare_data_dma(host, data)) { 75365e8b083SHaavard Skinnemoen host->data_chan = NULL; 754965ebf33SHaavard Skinnemoen 755965ebf33SHaavard Skinnemoen /* 756965ebf33SHaavard Skinnemoen * Errata: MMC data write operation with less than 12 757965ebf33SHaavard Skinnemoen * bytes is impossible. 758965ebf33SHaavard Skinnemoen * 759965ebf33SHaavard Skinnemoen * Errata: MCI Transmit Data Register (TDR) FIFO 760965ebf33SHaavard Skinnemoen * corruption when length is not multiple of 4. 761965ebf33SHaavard Skinnemoen */ 762965ebf33SHaavard Skinnemoen if (data->blocks * data->blksz < 12 763965ebf33SHaavard Skinnemoen || (data->blocks * data->blksz) & 3) 764965ebf33SHaavard Skinnemoen host->need_reset = true; 765965ebf33SHaavard Skinnemoen 7667d2be074SHaavard Skinnemoen host->sg = data->sg; 7677d2be074SHaavard Skinnemoen host->pio_offset = 0; 7687d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 7697d2be074SHaavard Skinnemoen iflags |= MCI_RXRDY; 7707d2be074SHaavard Skinnemoen else 7717d2be074SHaavard Skinnemoen iflags |= MCI_TXRDY; 77265e8b083SHaavard Skinnemoen } 7737d2be074SHaavard Skinnemoen 7747d2be074SHaavard Skinnemoen return iflags; 7757d2be074SHaavard Skinnemoen } 7767d2be074SHaavard Skinnemoen 777965ebf33SHaavard Skinnemoen static void atmci_start_request(struct atmel_mci *host, 778965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot) 7797d2be074SHaavard Skinnemoen { 780965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 7817d2be074SHaavard Skinnemoen struct mmc_command *cmd; 782965ebf33SHaavard Skinnemoen struct mmc_data *data; 7837d2be074SHaavard Skinnemoen u32 iflags; 784965ebf33SHaavard Skinnemoen u32 cmdflags; 785965ebf33SHaavard Skinnemoen 786965ebf33SHaavard Skinnemoen mrq = slot->mrq; 787965ebf33SHaavard Skinnemoen host->cur_slot = slot; 788965ebf33SHaavard Skinnemoen host->mrq = mrq; 789965ebf33SHaavard Skinnemoen 790965ebf33SHaavard Skinnemoen host->pending_events = 0; 791965ebf33SHaavard Skinnemoen host->completed_events = 0; 792ca55f46eSHaavard Skinnemoen host->data_status = 0; 793965ebf33SHaavard Skinnemoen 794965ebf33SHaavard Skinnemoen if (host->need_reset) { 795965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 796965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIEN); 797965ebf33SHaavard Skinnemoen mci_writel(host, MR, host->mode_reg); 79874791a2dSNicolas Ferre if (atmci_is_mci2()) 79974791a2dSNicolas Ferre mci_writel(host, CFG, host->cfg_reg); 800965ebf33SHaavard Skinnemoen host->need_reset = false; 801965ebf33SHaavard Skinnemoen } 802965ebf33SHaavard Skinnemoen mci_writel(host, SDCR, slot->sdc_reg); 8037d2be074SHaavard Skinnemoen 8047d2be074SHaavard Skinnemoen iflags = mci_readl(host, IMR); 80588ff82edSAnders Grahn if (iflags & ~(MCI_SDIOIRQA | MCI_SDIOIRQB)) 806965ebf33SHaavard Skinnemoen dev_warn(&slot->mmc->class_dev, "WARNING: IMR=0x%08x\n", 807965ebf33SHaavard Skinnemoen iflags); 8087d2be074SHaavard Skinnemoen 809965ebf33SHaavard Skinnemoen if (unlikely(test_and_clear_bit(ATMCI_CARD_NEED_INIT, &slot->flags))) { 810965ebf33SHaavard Skinnemoen /* Send init sequence (74 clock cycles) */ 811965ebf33SHaavard Skinnemoen mci_writel(host, CMDR, MCI_CMDR_SPCMD_INIT); 812965ebf33SHaavard Skinnemoen while (!(mci_readl(host, SR) & MCI_CMDRDY)) 813965ebf33SHaavard Skinnemoen cpu_relax(); 8147d2be074SHaavard Skinnemoen } 81574791a2dSNicolas Ferre iflags = 0; 8167d2be074SHaavard Skinnemoen data = mrq->data; 8177d2be074SHaavard Skinnemoen if (data) { 818965ebf33SHaavard Skinnemoen atmci_set_timeout(host, slot, data); 819a252e3e3SHaavard Skinnemoen 820a252e3e3SHaavard Skinnemoen /* Must set block count/size before sending command */ 821a252e3e3SHaavard Skinnemoen mci_writel(host, BLKR, MCI_BCNT(data->blocks) 822a252e3e3SHaavard Skinnemoen | MCI_BLKLEN(data->blksz)); 823965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "BLKR=0x%08x\n", 824965ebf33SHaavard Skinnemoen MCI_BCNT(data->blocks) | MCI_BLKLEN(data->blksz)); 82574791a2dSNicolas Ferre 82674791a2dSNicolas Ferre iflags |= atmci_prepare_data(host, data); 8277d2be074SHaavard Skinnemoen } 8287d2be074SHaavard Skinnemoen 82974791a2dSNicolas Ferre iflags |= MCI_CMDRDY; 8307d2be074SHaavard Skinnemoen cmd = mrq->cmd; 831965ebf33SHaavard Skinnemoen cmdflags = atmci_prepare_command(slot->mmc, cmd); 8327d2be074SHaavard Skinnemoen atmci_start_command(host, cmd, cmdflags); 8337d2be074SHaavard Skinnemoen 8347d2be074SHaavard Skinnemoen if (data) 83574791a2dSNicolas Ferre atmci_submit_data(host); 8367d2be074SHaavard Skinnemoen 8377d2be074SHaavard Skinnemoen if (mrq->stop) { 838965ebf33SHaavard Skinnemoen host->stop_cmdr = atmci_prepare_command(slot->mmc, mrq->stop); 8397d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_STOP_XFER; 8407d2be074SHaavard Skinnemoen if (!(data->flags & MMC_DATA_WRITE)) 8417d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_TRDIR_READ; 8427d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_STREAM) 8437d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_STREAM; 8447d2be074SHaavard Skinnemoen else 8457d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_MULTI_BLOCK; 8467d2be074SHaavard Skinnemoen } 8477d2be074SHaavard Skinnemoen 8487d2be074SHaavard Skinnemoen /* 8497d2be074SHaavard Skinnemoen * We could have enabled interrupts earlier, but I suspect 8507d2be074SHaavard Skinnemoen * that would open up a nice can of interesting race 8517d2be074SHaavard Skinnemoen * conditions (e.g. command and data complete, but stop not 8527d2be074SHaavard Skinnemoen * prepared yet.) 8537d2be074SHaavard Skinnemoen */ 8547d2be074SHaavard Skinnemoen mci_writel(host, IER, iflags); 855965ebf33SHaavard Skinnemoen } 8567d2be074SHaavard Skinnemoen 857965ebf33SHaavard Skinnemoen static void atmci_queue_request(struct atmel_mci *host, 858965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot, struct mmc_request *mrq) 859965ebf33SHaavard Skinnemoen { 860965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", 861965ebf33SHaavard Skinnemoen host->state); 862965ebf33SHaavard Skinnemoen 863965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 864965ebf33SHaavard Skinnemoen slot->mrq = mrq; 865965ebf33SHaavard Skinnemoen if (host->state == STATE_IDLE) { 866965ebf33SHaavard Skinnemoen host->state = STATE_SENDING_CMD; 867965ebf33SHaavard Skinnemoen atmci_start_request(host, slot); 868965ebf33SHaavard Skinnemoen } else { 869965ebf33SHaavard Skinnemoen list_add_tail(&slot->queue_node, &host->queue); 870965ebf33SHaavard Skinnemoen } 871965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 872965ebf33SHaavard Skinnemoen } 873965ebf33SHaavard Skinnemoen 874965ebf33SHaavard Skinnemoen static void atmci_request(struct mmc_host *mmc, struct mmc_request *mrq) 875965ebf33SHaavard Skinnemoen { 876965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 877965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 878965ebf33SHaavard Skinnemoen struct mmc_data *data; 879965ebf33SHaavard Skinnemoen 880965ebf33SHaavard Skinnemoen WARN_ON(slot->mrq); 881965ebf33SHaavard Skinnemoen 882965ebf33SHaavard Skinnemoen /* 883965ebf33SHaavard Skinnemoen * We may "know" the card is gone even though there's still an 884965ebf33SHaavard Skinnemoen * electrical connection. If so, we really need to communicate 885965ebf33SHaavard Skinnemoen * this to the MMC core since there won't be any more 886965ebf33SHaavard Skinnemoen * interrupts as the card is completely removed. Otherwise, 887965ebf33SHaavard Skinnemoen * the MMC core might believe the card is still there even 888965ebf33SHaavard Skinnemoen * though the card was just removed very slowly. 889965ebf33SHaavard Skinnemoen */ 890965ebf33SHaavard Skinnemoen if (!test_bit(ATMCI_CARD_PRESENT, &slot->flags)) { 891965ebf33SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 892965ebf33SHaavard Skinnemoen mmc_request_done(mmc, mrq); 8937d2be074SHaavard Skinnemoen return; 894965ebf33SHaavard Skinnemoen } 8957d2be074SHaavard Skinnemoen 896965ebf33SHaavard Skinnemoen /* We don't support multiple blocks of weird lengths. */ 897965ebf33SHaavard Skinnemoen data = mrq->data; 898965ebf33SHaavard Skinnemoen if (data && data->blocks > 1 && data->blksz & 3) { 8997d2be074SHaavard Skinnemoen mrq->cmd->error = -EINVAL; 9007d2be074SHaavard Skinnemoen mmc_request_done(mmc, mrq); 9017d2be074SHaavard Skinnemoen } 9027d2be074SHaavard Skinnemoen 903965ebf33SHaavard Skinnemoen atmci_queue_request(host, slot, mrq); 904965ebf33SHaavard Skinnemoen } 905965ebf33SHaavard Skinnemoen 9067d2be074SHaavard Skinnemoen static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 9077d2be074SHaavard Skinnemoen { 908965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 909965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 910965ebf33SHaavard Skinnemoen unsigned int i; 9117d2be074SHaavard Skinnemoen 912965ebf33SHaavard Skinnemoen slot->sdc_reg &= ~MCI_SDCBUS_MASK; 913945533b5SHaavard Skinnemoen switch (ios->bus_width) { 914945533b5SHaavard Skinnemoen case MMC_BUS_WIDTH_1: 915965ebf33SHaavard Skinnemoen slot->sdc_reg |= MCI_SDCBUS_1BIT; 916945533b5SHaavard Skinnemoen break; 917945533b5SHaavard Skinnemoen case MMC_BUS_WIDTH_4: 91832ab83a5SHans-Christian Egtvedt slot->sdc_reg |= MCI_SDCBUS_4BIT; 919945533b5SHaavard Skinnemoen break; 920945533b5SHaavard Skinnemoen } 921945533b5SHaavard Skinnemoen 9227d2be074SHaavard Skinnemoen if (ios->clock) { 923965ebf33SHaavard Skinnemoen unsigned int clock_min = ~0U; 9247d2be074SHaavard Skinnemoen u32 clkdiv; 9257d2be074SHaavard Skinnemoen 926965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 927965ebf33SHaavard Skinnemoen if (!host->mode_reg) { 928945533b5SHaavard Skinnemoen clk_enable(host->mck); 929965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 930965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIEN); 93174791a2dSNicolas Ferre if (atmci_is_mci2()) 93274791a2dSNicolas Ferre mci_writel(host, CFG, host->cfg_reg); 933965ebf33SHaavard Skinnemoen } 934945533b5SHaavard Skinnemoen 935965ebf33SHaavard Skinnemoen /* 936965ebf33SHaavard Skinnemoen * Use mirror of ios->clock to prevent race with mmc 937965ebf33SHaavard Skinnemoen * core ios update when finding the minimum. 938965ebf33SHaavard Skinnemoen */ 939965ebf33SHaavard Skinnemoen slot->clock = ios->clock; 940965ebf33SHaavard Skinnemoen for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) { 941965ebf33SHaavard Skinnemoen if (host->slot[i] && host->slot[i]->clock 942965ebf33SHaavard Skinnemoen && host->slot[i]->clock < clock_min) 943965ebf33SHaavard Skinnemoen clock_min = host->slot[i]->clock; 944965ebf33SHaavard Skinnemoen } 945965ebf33SHaavard Skinnemoen 946965ebf33SHaavard Skinnemoen /* Calculate clock divider */ 947965ebf33SHaavard Skinnemoen clkdiv = DIV_ROUND_UP(host->bus_hz, 2 * clock_min) - 1; 9487d2be074SHaavard Skinnemoen if (clkdiv > 255) { 9497d2be074SHaavard Skinnemoen dev_warn(&mmc->class_dev, 9507d2be074SHaavard Skinnemoen "clock %u too slow; using %lu\n", 951965ebf33SHaavard Skinnemoen clock_min, host->bus_hz / (2 * 256)); 9527d2be074SHaavard Skinnemoen clkdiv = 255; 9537d2be074SHaavard Skinnemoen } 9547d2be074SHaavard Skinnemoen 95504d699c3SRob Emanuele host->mode_reg = MCI_MR_CLKDIV(clkdiv); 95604d699c3SRob Emanuele 957965ebf33SHaavard Skinnemoen /* 958965ebf33SHaavard Skinnemoen * WRPROOF and RDPROOF prevent overruns/underruns by 959965ebf33SHaavard Skinnemoen * stopping the clock when the FIFO is full/empty. 960965ebf33SHaavard Skinnemoen * This state is not expected to last for long. 961965ebf33SHaavard Skinnemoen */ 96204d699c3SRob Emanuele if (mci_has_rwproof()) 96304d699c3SRob Emanuele host->mode_reg |= (MCI_MR_WRPROOF | MCI_MR_RDPROOF); 9647d2be074SHaavard Skinnemoen 96599ddffd8SNicolas Ferre if (atmci_is_mci2()) { 96699ddffd8SNicolas Ferre /* setup High Speed mode in relation with card capacity */ 96799ddffd8SNicolas Ferre if (ios->timing == MMC_TIMING_SD_HS) 96899ddffd8SNicolas Ferre host->cfg_reg |= MCI_CFG_HSMODE; 969965ebf33SHaavard Skinnemoen else 97099ddffd8SNicolas Ferre host->cfg_reg &= ~MCI_CFG_HSMODE; 97199ddffd8SNicolas Ferre } 97299ddffd8SNicolas Ferre 97399ddffd8SNicolas Ferre if (list_empty(&host->queue)) { 97499ddffd8SNicolas Ferre mci_writel(host, MR, host->mode_reg); 97599ddffd8SNicolas Ferre if (atmci_is_mci2()) 97699ddffd8SNicolas Ferre mci_writel(host, CFG, host->cfg_reg); 97799ddffd8SNicolas Ferre } else { 978965ebf33SHaavard Skinnemoen host->need_clock_update = true; 97999ddffd8SNicolas Ferre } 980965ebf33SHaavard Skinnemoen 981965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 982945533b5SHaavard Skinnemoen } else { 983965ebf33SHaavard Skinnemoen bool any_slot_active = false; 984965ebf33SHaavard Skinnemoen 985965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 986965ebf33SHaavard Skinnemoen slot->clock = 0; 987965ebf33SHaavard Skinnemoen for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) { 988965ebf33SHaavard Skinnemoen if (host->slot[i] && host->slot[i]->clock) { 989965ebf33SHaavard Skinnemoen any_slot_active = true; 990965ebf33SHaavard Skinnemoen break; 991965ebf33SHaavard Skinnemoen } 992965ebf33SHaavard Skinnemoen } 993965ebf33SHaavard Skinnemoen if (!any_slot_active) { 994945533b5SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIDIS); 995945533b5SHaavard Skinnemoen if (host->mode_reg) { 996945533b5SHaavard Skinnemoen mci_readl(host, MR); 997945533b5SHaavard Skinnemoen clk_disable(host->mck); 998945533b5SHaavard Skinnemoen } 999945533b5SHaavard Skinnemoen host->mode_reg = 0; 10007d2be074SHaavard Skinnemoen } 1001965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 1002965ebf33SHaavard Skinnemoen } 10037d2be074SHaavard Skinnemoen 10047d2be074SHaavard Skinnemoen switch (ios->power_mode) { 1005965ebf33SHaavard Skinnemoen case MMC_POWER_UP: 1006965ebf33SHaavard Skinnemoen set_bit(ATMCI_CARD_NEED_INIT, &slot->flags); 1007965ebf33SHaavard Skinnemoen break; 10087d2be074SHaavard Skinnemoen default: 10097d2be074SHaavard Skinnemoen /* 10107d2be074SHaavard Skinnemoen * TODO: None of the currently available AVR32-based 10117d2be074SHaavard Skinnemoen * boards allow MMC power to be turned off. Implement 10127d2be074SHaavard Skinnemoen * power control when this can be tested properly. 1013965ebf33SHaavard Skinnemoen * 1014965ebf33SHaavard Skinnemoen * We also need to hook this into the clock management 1015965ebf33SHaavard Skinnemoen * somehow so that newly inserted cards aren't 1016965ebf33SHaavard Skinnemoen * subjected to a fast clock before we have a chance 1017965ebf33SHaavard Skinnemoen * to figure out what the maximum rate is. Currently, 1018965ebf33SHaavard Skinnemoen * there's no way to avoid this, and there never will 1019965ebf33SHaavard Skinnemoen * be for boards that don't support power control. 10207d2be074SHaavard Skinnemoen */ 10217d2be074SHaavard Skinnemoen break; 10227d2be074SHaavard Skinnemoen } 10237d2be074SHaavard Skinnemoen } 10247d2be074SHaavard Skinnemoen 10257d2be074SHaavard Skinnemoen static int atmci_get_ro(struct mmc_host *mmc) 10267d2be074SHaavard Skinnemoen { 1027965ebf33SHaavard Skinnemoen int read_only = -ENOSYS; 1028965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 10297d2be074SHaavard Skinnemoen 1030965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->wp_pin)) { 1031965ebf33SHaavard Skinnemoen read_only = gpio_get_value(slot->wp_pin); 10327d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "card is %s\n", 10337d2be074SHaavard Skinnemoen read_only ? "read-only" : "read-write"); 10347d2be074SHaavard Skinnemoen } 10357d2be074SHaavard Skinnemoen 10367d2be074SHaavard Skinnemoen return read_only; 10377d2be074SHaavard Skinnemoen } 10387d2be074SHaavard Skinnemoen 1039965ebf33SHaavard Skinnemoen static int atmci_get_cd(struct mmc_host *mmc) 1040965ebf33SHaavard Skinnemoen { 1041965ebf33SHaavard Skinnemoen int present = -ENOSYS; 1042965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 1043965ebf33SHaavard Skinnemoen 1044965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 10451c1452beSJonas Larsson present = !(gpio_get_value(slot->detect_pin) ^ 10461c1452beSJonas Larsson slot->detect_is_active_high); 1047965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "card is %spresent\n", 1048965ebf33SHaavard Skinnemoen present ? "" : "not "); 1049965ebf33SHaavard Skinnemoen } 1050965ebf33SHaavard Skinnemoen 1051965ebf33SHaavard Skinnemoen return present; 1052965ebf33SHaavard Skinnemoen } 1053965ebf33SHaavard Skinnemoen 105488ff82edSAnders Grahn static void atmci_enable_sdio_irq(struct mmc_host *mmc, int enable) 105588ff82edSAnders Grahn { 105688ff82edSAnders Grahn struct atmel_mci_slot *slot = mmc_priv(mmc); 105788ff82edSAnders Grahn struct atmel_mci *host = slot->host; 105888ff82edSAnders Grahn 105988ff82edSAnders Grahn if (enable) 106088ff82edSAnders Grahn mci_writel(host, IER, slot->sdio_irq); 106188ff82edSAnders Grahn else 106288ff82edSAnders Grahn mci_writel(host, IDR, slot->sdio_irq); 106388ff82edSAnders Grahn } 106488ff82edSAnders Grahn 1065965ebf33SHaavard Skinnemoen static const struct mmc_host_ops atmci_ops = { 10667d2be074SHaavard Skinnemoen .request = atmci_request, 10677d2be074SHaavard Skinnemoen .set_ios = atmci_set_ios, 10687d2be074SHaavard Skinnemoen .get_ro = atmci_get_ro, 1069965ebf33SHaavard Skinnemoen .get_cd = atmci_get_cd, 107088ff82edSAnders Grahn .enable_sdio_irq = atmci_enable_sdio_irq, 10717d2be074SHaavard Skinnemoen }; 10727d2be074SHaavard Skinnemoen 1073965ebf33SHaavard Skinnemoen /* Called with host->lock held */ 1074965ebf33SHaavard Skinnemoen static void atmci_request_end(struct atmel_mci *host, struct mmc_request *mrq) 1075965ebf33SHaavard Skinnemoen __releases(&host->lock) 1076965ebf33SHaavard Skinnemoen __acquires(&host->lock) 1077965ebf33SHaavard Skinnemoen { 1078965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = NULL; 1079965ebf33SHaavard Skinnemoen struct mmc_host *prev_mmc = host->cur_slot->mmc; 1080965ebf33SHaavard Skinnemoen 1081965ebf33SHaavard Skinnemoen WARN_ON(host->cmd || host->data); 1082965ebf33SHaavard Skinnemoen 1083965ebf33SHaavard Skinnemoen /* 1084965ebf33SHaavard Skinnemoen * Update the MMC clock rate if necessary. This may be 1085965ebf33SHaavard Skinnemoen * necessary if set_ios() is called when a different slot is 1086965ebf33SHaavard Skinnemoen * busy transfering data. 1087965ebf33SHaavard Skinnemoen */ 108899ddffd8SNicolas Ferre if (host->need_clock_update) { 1089965ebf33SHaavard Skinnemoen mci_writel(host, MR, host->mode_reg); 109099ddffd8SNicolas Ferre if (atmci_is_mci2()) 109199ddffd8SNicolas Ferre mci_writel(host, CFG, host->cfg_reg); 109299ddffd8SNicolas Ferre } 1093965ebf33SHaavard Skinnemoen 1094965ebf33SHaavard Skinnemoen host->cur_slot->mrq = NULL; 1095965ebf33SHaavard Skinnemoen host->mrq = NULL; 1096965ebf33SHaavard Skinnemoen if (!list_empty(&host->queue)) { 1097965ebf33SHaavard Skinnemoen slot = list_entry(host->queue.next, 1098965ebf33SHaavard Skinnemoen struct atmel_mci_slot, queue_node); 1099965ebf33SHaavard Skinnemoen list_del(&slot->queue_node); 1100965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "list not empty: %s is next\n", 1101965ebf33SHaavard Skinnemoen mmc_hostname(slot->mmc)); 1102965ebf33SHaavard Skinnemoen host->state = STATE_SENDING_CMD; 1103965ebf33SHaavard Skinnemoen atmci_start_request(host, slot); 1104965ebf33SHaavard Skinnemoen } else { 1105965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "list empty\n"); 1106965ebf33SHaavard Skinnemoen host->state = STATE_IDLE; 1107965ebf33SHaavard Skinnemoen } 1108965ebf33SHaavard Skinnemoen 1109965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 1110965ebf33SHaavard Skinnemoen mmc_request_done(prev_mmc, mrq); 1111965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1112965ebf33SHaavard Skinnemoen } 1113965ebf33SHaavard Skinnemoen 11147d2be074SHaavard Skinnemoen static void atmci_command_complete(struct atmel_mci *host, 1115c06ad258SHaavard Skinnemoen struct mmc_command *cmd) 11167d2be074SHaavard Skinnemoen { 1117c06ad258SHaavard Skinnemoen u32 status = host->cmd_status; 1118c06ad258SHaavard Skinnemoen 11197d2be074SHaavard Skinnemoen /* Read the response from the card (up to 16 bytes) */ 11207d2be074SHaavard Skinnemoen cmd->resp[0] = mci_readl(host, RSPR); 11217d2be074SHaavard Skinnemoen cmd->resp[1] = mci_readl(host, RSPR); 11227d2be074SHaavard Skinnemoen cmd->resp[2] = mci_readl(host, RSPR); 11237d2be074SHaavard Skinnemoen cmd->resp[3] = mci_readl(host, RSPR); 11247d2be074SHaavard Skinnemoen 11257d2be074SHaavard Skinnemoen if (status & MCI_RTOE) 11267d2be074SHaavard Skinnemoen cmd->error = -ETIMEDOUT; 11277d2be074SHaavard Skinnemoen else if ((cmd->flags & MMC_RSP_CRC) && (status & MCI_RCRCE)) 11287d2be074SHaavard Skinnemoen cmd->error = -EILSEQ; 11297d2be074SHaavard Skinnemoen else if (status & (MCI_RINDE | MCI_RDIRE | MCI_RENDE)) 11307d2be074SHaavard Skinnemoen cmd->error = -EIO; 11317d2be074SHaavard Skinnemoen else 11327d2be074SHaavard Skinnemoen cmd->error = 0; 11337d2be074SHaavard Skinnemoen 11347d2be074SHaavard Skinnemoen if (cmd->error) { 1135965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 11367d2be074SHaavard Skinnemoen "command error: status=0x%08x\n", status); 11377d2be074SHaavard Skinnemoen 11387d2be074SHaavard Skinnemoen if (cmd->data) { 113965e8b083SHaavard Skinnemoen atmci_stop_dma(host); 1140009a891bSNicolas Ferre host->data = NULL; 11417d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_NOTBUSY 11427d2be074SHaavard Skinnemoen | MCI_TXRDY | MCI_RXRDY 11437d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS); 11447d2be074SHaavard Skinnemoen } 11457d2be074SHaavard Skinnemoen } 11467d2be074SHaavard Skinnemoen } 11477d2be074SHaavard Skinnemoen 11487d2be074SHaavard Skinnemoen static void atmci_detect_change(unsigned long data) 11497d2be074SHaavard Skinnemoen { 1150965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = (struct atmel_mci_slot *)data; 1151965ebf33SHaavard Skinnemoen bool present; 1152965ebf33SHaavard Skinnemoen bool present_old; 11537d2be074SHaavard Skinnemoen 11547d2be074SHaavard Skinnemoen /* 1155965ebf33SHaavard Skinnemoen * atmci_cleanup_slot() sets the ATMCI_SHUTDOWN flag before 1156965ebf33SHaavard Skinnemoen * freeing the interrupt. We must not re-enable the interrupt 1157965ebf33SHaavard Skinnemoen * if it has been freed, and if we're shutting down, it 1158965ebf33SHaavard Skinnemoen * doesn't really matter whether the card is present or not. 11597d2be074SHaavard Skinnemoen */ 11607d2be074SHaavard Skinnemoen smp_rmb(); 1161965ebf33SHaavard Skinnemoen if (test_bit(ATMCI_SHUTDOWN, &slot->flags)) 11627d2be074SHaavard Skinnemoen return; 11637d2be074SHaavard Skinnemoen 1164965ebf33SHaavard Skinnemoen enable_irq(gpio_to_irq(slot->detect_pin)); 11651c1452beSJonas Larsson present = !(gpio_get_value(slot->detect_pin) ^ 11661c1452beSJonas Larsson slot->detect_is_active_high); 1167965ebf33SHaavard Skinnemoen present_old = test_bit(ATMCI_CARD_PRESENT, &slot->flags); 11687d2be074SHaavard Skinnemoen 1169965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "detect change: %d (was %d)\n", 1170965ebf33SHaavard Skinnemoen present, present_old); 11717d2be074SHaavard Skinnemoen 1172965ebf33SHaavard Skinnemoen if (present != present_old) { 1173965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 1174965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 1175965ebf33SHaavard Skinnemoen 1176965ebf33SHaavard Skinnemoen dev_dbg(&slot->mmc->class_dev, "card %s\n", 11777d2be074SHaavard Skinnemoen present ? "inserted" : "removed"); 11787d2be074SHaavard Skinnemoen 1179965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1180965ebf33SHaavard Skinnemoen 1181965ebf33SHaavard Skinnemoen if (!present) 1182965ebf33SHaavard Skinnemoen clear_bit(ATMCI_CARD_PRESENT, &slot->flags); 1183965ebf33SHaavard Skinnemoen else 1184965ebf33SHaavard Skinnemoen set_bit(ATMCI_CARD_PRESENT, &slot->flags); 11857d2be074SHaavard Skinnemoen 11867d2be074SHaavard Skinnemoen /* Clean up queue if present */ 1187965ebf33SHaavard Skinnemoen mrq = slot->mrq; 11887d2be074SHaavard Skinnemoen if (mrq) { 1189965ebf33SHaavard Skinnemoen if (mrq == host->mrq) { 11907d2be074SHaavard Skinnemoen /* 11917d2be074SHaavard Skinnemoen * Reset controller to terminate any ongoing 11927d2be074SHaavard Skinnemoen * commands or data transfers. 11937d2be074SHaavard Skinnemoen */ 11947d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 1195965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIEN); 1196965ebf33SHaavard Skinnemoen mci_writel(host, MR, host->mode_reg); 119774791a2dSNicolas Ferre if (atmci_is_mci2()) 119874791a2dSNicolas Ferre mci_writel(host, CFG, host->cfg_reg); 11997d2be074SHaavard Skinnemoen 12007d2be074SHaavard Skinnemoen host->data = NULL; 12017d2be074SHaavard Skinnemoen host->cmd = NULL; 1202c06ad258SHaavard Skinnemoen 1203c06ad258SHaavard Skinnemoen switch (host->state) { 1204965ebf33SHaavard Skinnemoen case STATE_IDLE: 1205965ebf33SHaavard Skinnemoen break; 1206c06ad258SHaavard Skinnemoen case STATE_SENDING_CMD: 1207c06ad258SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 1208c06ad258SHaavard Skinnemoen if (!mrq->data) 1209c06ad258SHaavard Skinnemoen break; 1210c06ad258SHaavard Skinnemoen /* fall through */ 1211c06ad258SHaavard Skinnemoen case STATE_SENDING_DATA: 1212c06ad258SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 121365e8b083SHaavard Skinnemoen atmci_stop_dma(host); 1214c06ad258SHaavard Skinnemoen break; 1215c06ad258SHaavard Skinnemoen case STATE_DATA_BUSY: 1216c06ad258SHaavard Skinnemoen case STATE_DATA_ERROR: 1217c06ad258SHaavard Skinnemoen if (mrq->data->error == -EINPROGRESS) 1218c06ad258SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 1219c06ad258SHaavard Skinnemoen if (!mrq->stop) 1220c06ad258SHaavard Skinnemoen break; 1221c06ad258SHaavard Skinnemoen /* fall through */ 1222c06ad258SHaavard Skinnemoen case STATE_SENDING_STOP: 1223c06ad258SHaavard Skinnemoen mrq->stop->error = -ENOMEDIUM; 1224c06ad258SHaavard Skinnemoen break; 1225c06ad258SHaavard Skinnemoen } 1226c06ad258SHaavard Skinnemoen 1227965ebf33SHaavard Skinnemoen atmci_request_end(host, mrq); 1228965ebf33SHaavard Skinnemoen } else { 1229965ebf33SHaavard Skinnemoen list_del(&slot->queue_node); 1230965ebf33SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 1231965ebf33SHaavard Skinnemoen if (mrq->data) 1232965ebf33SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 1233965ebf33SHaavard Skinnemoen if (mrq->stop) 1234965ebf33SHaavard Skinnemoen mrq->stop->error = -ENOMEDIUM; 12357d2be074SHaavard Skinnemoen 1236965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 1237965ebf33SHaavard Skinnemoen mmc_request_done(slot->mmc, mrq); 1238965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1239965ebf33SHaavard Skinnemoen } 1240965ebf33SHaavard Skinnemoen } 1241965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 1242965ebf33SHaavard Skinnemoen 1243965ebf33SHaavard Skinnemoen mmc_detect_change(slot->mmc, 0); 12447d2be074SHaavard Skinnemoen } 12457d2be074SHaavard Skinnemoen } 12467d2be074SHaavard Skinnemoen 12477d2be074SHaavard Skinnemoen static void atmci_tasklet_func(unsigned long priv) 12487d2be074SHaavard Skinnemoen { 1249965ebf33SHaavard Skinnemoen struct atmel_mci *host = (struct atmel_mci *)priv; 12507d2be074SHaavard Skinnemoen struct mmc_request *mrq = host->mrq; 12517d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 1252c06ad258SHaavard Skinnemoen struct mmc_command *cmd = host->cmd; 1253c06ad258SHaavard Skinnemoen enum atmel_mci_state state = host->state; 1254c06ad258SHaavard Skinnemoen enum atmel_mci_state prev_state; 1255c06ad258SHaavard Skinnemoen u32 status; 1256c06ad258SHaavard Skinnemoen 1257965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1258965ebf33SHaavard Skinnemoen 1259c06ad258SHaavard Skinnemoen state = host->state; 12607d2be074SHaavard Skinnemoen 1261965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, 1262c06ad258SHaavard Skinnemoen "tasklet: state %u pending/completed/mask %lx/%lx/%x\n", 1263c06ad258SHaavard Skinnemoen state, host->pending_events, host->completed_events, 12647d2be074SHaavard Skinnemoen mci_readl(host, IMR)); 12657d2be074SHaavard Skinnemoen 1266c06ad258SHaavard Skinnemoen do { 1267c06ad258SHaavard Skinnemoen prev_state = state; 1268c06ad258SHaavard Skinnemoen 1269c06ad258SHaavard Skinnemoen switch (state) { 1270965ebf33SHaavard Skinnemoen case STATE_IDLE: 1271965ebf33SHaavard Skinnemoen break; 1272965ebf33SHaavard Skinnemoen 1273c06ad258SHaavard Skinnemoen case STATE_SENDING_CMD: 1274c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1275c06ad258SHaavard Skinnemoen EVENT_CMD_COMPLETE)) 1276c06ad258SHaavard Skinnemoen break; 1277c06ad258SHaavard Skinnemoen 12787d2be074SHaavard Skinnemoen host->cmd = NULL; 12797d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_CMD_COMPLETE); 1280c06ad258SHaavard Skinnemoen atmci_command_complete(host, mrq->cmd); 1281c06ad258SHaavard Skinnemoen if (!mrq->data || cmd->error) { 1282965ebf33SHaavard Skinnemoen atmci_request_end(host, host->mrq); 1283965ebf33SHaavard Skinnemoen goto unlock; 12847d2be074SHaavard Skinnemoen } 1285c06ad258SHaavard Skinnemoen 1286c06ad258SHaavard Skinnemoen prev_state = state = STATE_SENDING_DATA; 1287c06ad258SHaavard Skinnemoen /* fall through */ 1288c06ad258SHaavard Skinnemoen 1289c06ad258SHaavard Skinnemoen case STATE_SENDING_DATA: 1290c06ad258SHaavard Skinnemoen if (atmci_test_and_clear_pending(host, 1291c06ad258SHaavard Skinnemoen EVENT_DATA_ERROR)) { 129265e8b083SHaavard Skinnemoen atmci_stop_dma(host); 1293c06ad258SHaavard Skinnemoen if (data->stop) 1294965ebf33SHaavard Skinnemoen send_stop_cmd(host, data); 1295c06ad258SHaavard Skinnemoen state = STATE_DATA_ERROR; 1296c06ad258SHaavard Skinnemoen break; 12977d2be074SHaavard Skinnemoen } 12987d2be074SHaavard Skinnemoen 1299c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1300c06ad258SHaavard Skinnemoen EVENT_XFER_COMPLETE)) 1301c06ad258SHaavard Skinnemoen break; 13027d2be074SHaavard Skinnemoen 1303c06ad258SHaavard Skinnemoen atmci_set_completed(host, EVENT_XFER_COMPLETE); 1304c06ad258SHaavard Skinnemoen prev_state = state = STATE_DATA_BUSY; 1305c06ad258SHaavard Skinnemoen /* fall through */ 1306c06ad258SHaavard Skinnemoen 1307c06ad258SHaavard Skinnemoen case STATE_DATA_BUSY: 1308c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1309c06ad258SHaavard Skinnemoen EVENT_DATA_COMPLETE)) 1310c06ad258SHaavard Skinnemoen break; 1311c06ad258SHaavard Skinnemoen 1312c06ad258SHaavard Skinnemoen host->data = NULL; 13137d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_DATA_COMPLETE); 1314c06ad258SHaavard Skinnemoen status = host->data_status; 1315c06ad258SHaavard Skinnemoen if (unlikely(status & ATMCI_DATA_ERROR_FLAGS)) { 13167d2be074SHaavard Skinnemoen if (status & MCI_DTOE) { 1317965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 13187d2be074SHaavard Skinnemoen "data timeout error\n"); 13197d2be074SHaavard Skinnemoen data->error = -ETIMEDOUT; 13207d2be074SHaavard Skinnemoen } else if (status & MCI_DCRCE) { 1321965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 1322c06ad258SHaavard Skinnemoen "data CRC error\n"); 13237d2be074SHaavard Skinnemoen data->error = -EILSEQ; 13247d2be074SHaavard Skinnemoen } else { 1325965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 13267d2be074SHaavard Skinnemoen "data FIFO error (status=%08x)\n", 13277d2be074SHaavard Skinnemoen status); 13287d2be074SHaavard Skinnemoen data->error = -EIO; 13297d2be074SHaavard Skinnemoen } 1330c06ad258SHaavard Skinnemoen } else { 13317d2be074SHaavard Skinnemoen data->bytes_xfered = data->blocks * data->blksz; 13327d2be074SHaavard Skinnemoen data->error = 0; 1333abc2c9fdSNicolas Ferre mci_writel(host, IDR, ATMCI_DATA_ERROR_FLAGS); 13347d2be074SHaavard Skinnemoen } 13357d2be074SHaavard Skinnemoen 1336c06ad258SHaavard Skinnemoen if (!data->stop) { 1337965ebf33SHaavard Skinnemoen atmci_request_end(host, host->mrq); 1338965ebf33SHaavard Skinnemoen goto unlock; 13397d2be074SHaavard Skinnemoen } 13407d2be074SHaavard Skinnemoen 1341c06ad258SHaavard Skinnemoen prev_state = state = STATE_SENDING_STOP; 1342c06ad258SHaavard Skinnemoen if (!data->error) 1343965ebf33SHaavard Skinnemoen send_stop_cmd(host, data); 1344c06ad258SHaavard Skinnemoen /* fall through */ 1345c06ad258SHaavard Skinnemoen 1346c06ad258SHaavard Skinnemoen case STATE_SENDING_STOP: 1347c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1348c06ad258SHaavard Skinnemoen EVENT_CMD_COMPLETE)) 1349c06ad258SHaavard Skinnemoen break; 1350c06ad258SHaavard Skinnemoen 1351c06ad258SHaavard Skinnemoen host->cmd = NULL; 1352c06ad258SHaavard Skinnemoen atmci_command_complete(host, mrq->stop); 1353965ebf33SHaavard Skinnemoen atmci_request_end(host, host->mrq); 1354965ebf33SHaavard Skinnemoen goto unlock; 1355c06ad258SHaavard Skinnemoen 1356c06ad258SHaavard Skinnemoen case STATE_DATA_ERROR: 1357c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1358c06ad258SHaavard Skinnemoen EVENT_XFER_COMPLETE)) 1359c06ad258SHaavard Skinnemoen break; 1360c06ad258SHaavard Skinnemoen 1361c06ad258SHaavard Skinnemoen state = STATE_DATA_BUSY; 1362c06ad258SHaavard Skinnemoen break; 1363c06ad258SHaavard Skinnemoen } 1364c06ad258SHaavard Skinnemoen } while (state != prev_state); 1365c06ad258SHaavard Skinnemoen 1366c06ad258SHaavard Skinnemoen host->state = state; 1367965ebf33SHaavard Skinnemoen 1368965ebf33SHaavard Skinnemoen unlock: 1369965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 13707d2be074SHaavard Skinnemoen } 13717d2be074SHaavard Skinnemoen 13727d2be074SHaavard Skinnemoen static void atmci_read_data_pio(struct atmel_mci *host) 13737d2be074SHaavard Skinnemoen { 13747d2be074SHaavard Skinnemoen struct scatterlist *sg = host->sg; 13757d2be074SHaavard Skinnemoen void *buf = sg_virt(sg); 13767d2be074SHaavard Skinnemoen unsigned int offset = host->pio_offset; 13777d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 13787d2be074SHaavard Skinnemoen u32 value; 13797d2be074SHaavard Skinnemoen u32 status; 13807d2be074SHaavard Skinnemoen unsigned int nbytes = 0; 13817d2be074SHaavard Skinnemoen 13827d2be074SHaavard Skinnemoen do { 13837d2be074SHaavard Skinnemoen value = mci_readl(host, RDR); 13847d2be074SHaavard Skinnemoen if (likely(offset + 4 <= sg->length)) { 13857d2be074SHaavard Skinnemoen put_unaligned(value, (u32 *)(buf + offset)); 13867d2be074SHaavard Skinnemoen 13877d2be074SHaavard Skinnemoen offset += 4; 13887d2be074SHaavard Skinnemoen nbytes += 4; 13897d2be074SHaavard Skinnemoen 13907d2be074SHaavard Skinnemoen if (offset == sg->length) { 13915e7184aeSHaavard Skinnemoen flush_dcache_page(sg_page(sg)); 13927d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 13937d2be074SHaavard Skinnemoen if (!sg) 13947d2be074SHaavard Skinnemoen goto done; 13957d2be074SHaavard Skinnemoen 13967d2be074SHaavard Skinnemoen offset = 0; 13977d2be074SHaavard Skinnemoen buf = sg_virt(sg); 13987d2be074SHaavard Skinnemoen } 13997d2be074SHaavard Skinnemoen } else { 14007d2be074SHaavard Skinnemoen unsigned int remaining = sg->length - offset; 14017d2be074SHaavard Skinnemoen memcpy(buf + offset, &value, remaining); 14027d2be074SHaavard Skinnemoen nbytes += remaining; 14037d2be074SHaavard Skinnemoen 14047d2be074SHaavard Skinnemoen flush_dcache_page(sg_page(sg)); 14057d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 14067d2be074SHaavard Skinnemoen if (!sg) 14077d2be074SHaavard Skinnemoen goto done; 14087d2be074SHaavard Skinnemoen 14097d2be074SHaavard Skinnemoen offset = 4 - remaining; 14107d2be074SHaavard Skinnemoen buf = sg_virt(sg); 14117d2be074SHaavard Skinnemoen memcpy(buf, (u8 *)&value + remaining, offset); 14127d2be074SHaavard Skinnemoen nbytes += offset; 14137d2be074SHaavard Skinnemoen } 14147d2be074SHaavard Skinnemoen 14157d2be074SHaavard Skinnemoen status = mci_readl(host, SR); 14167d2be074SHaavard Skinnemoen if (status & ATMCI_DATA_ERROR_FLAGS) { 14177d2be074SHaavard Skinnemoen mci_writel(host, IDR, (MCI_NOTBUSY | MCI_RXRDY 14187d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS)); 14197d2be074SHaavard Skinnemoen host->data_status = status; 1420965ebf33SHaavard Skinnemoen data->bytes_xfered += nbytes; 1421965ebf33SHaavard Skinnemoen smp_wmb(); 14227d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 14237d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 1424965ebf33SHaavard Skinnemoen return; 14257d2be074SHaavard Skinnemoen } 14267d2be074SHaavard Skinnemoen } while (status & MCI_RXRDY); 14277d2be074SHaavard Skinnemoen 14287d2be074SHaavard Skinnemoen host->pio_offset = offset; 14297d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 14307d2be074SHaavard Skinnemoen 14317d2be074SHaavard Skinnemoen return; 14327d2be074SHaavard Skinnemoen 14337d2be074SHaavard Skinnemoen done: 14347d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_RXRDY); 14357d2be074SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 14367d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 1437965ebf33SHaavard Skinnemoen smp_wmb(); 1438c06ad258SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 14397d2be074SHaavard Skinnemoen } 14407d2be074SHaavard Skinnemoen 14417d2be074SHaavard Skinnemoen static void atmci_write_data_pio(struct atmel_mci *host) 14427d2be074SHaavard Skinnemoen { 14437d2be074SHaavard Skinnemoen struct scatterlist *sg = host->sg; 14447d2be074SHaavard Skinnemoen void *buf = sg_virt(sg); 14457d2be074SHaavard Skinnemoen unsigned int offset = host->pio_offset; 14467d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 14477d2be074SHaavard Skinnemoen u32 value; 14487d2be074SHaavard Skinnemoen u32 status; 14497d2be074SHaavard Skinnemoen unsigned int nbytes = 0; 14507d2be074SHaavard Skinnemoen 14517d2be074SHaavard Skinnemoen do { 14527d2be074SHaavard Skinnemoen if (likely(offset + 4 <= sg->length)) { 14537d2be074SHaavard Skinnemoen value = get_unaligned((u32 *)(buf + offset)); 14547d2be074SHaavard Skinnemoen mci_writel(host, TDR, value); 14557d2be074SHaavard Skinnemoen 14567d2be074SHaavard Skinnemoen offset += 4; 14577d2be074SHaavard Skinnemoen nbytes += 4; 14587d2be074SHaavard Skinnemoen if (offset == sg->length) { 14597d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 14607d2be074SHaavard Skinnemoen if (!sg) 14617d2be074SHaavard Skinnemoen goto done; 14627d2be074SHaavard Skinnemoen 14637d2be074SHaavard Skinnemoen offset = 0; 14647d2be074SHaavard Skinnemoen buf = sg_virt(sg); 14657d2be074SHaavard Skinnemoen } 14667d2be074SHaavard Skinnemoen } else { 14677d2be074SHaavard Skinnemoen unsigned int remaining = sg->length - offset; 14687d2be074SHaavard Skinnemoen 14697d2be074SHaavard Skinnemoen value = 0; 14707d2be074SHaavard Skinnemoen memcpy(&value, buf + offset, remaining); 14717d2be074SHaavard Skinnemoen nbytes += remaining; 14727d2be074SHaavard Skinnemoen 14737d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 14747d2be074SHaavard Skinnemoen if (!sg) { 14757d2be074SHaavard Skinnemoen mci_writel(host, TDR, value); 14767d2be074SHaavard Skinnemoen goto done; 14777d2be074SHaavard Skinnemoen } 14787d2be074SHaavard Skinnemoen 14797d2be074SHaavard Skinnemoen offset = 4 - remaining; 14807d2be074SHaavard Skinnemoen buf = sg_virt(sg); 14817d2be074SHaavard Skinnemoen memcpy((u8 *)&value + remaining, buf, offset); 14827d2be074SHaavard Skinnemoen mci_writel(host, TDR, value); 14837d2be074SHaavard Skinnemoen nbytes += offset; 14847d2be074SHaavard Skinnemoen } 14857d2be074SHaavard Skinnemoen 14867d2be074SHaavard Skinnemoen status = mci_readl(host, SR); 14877d2be074SHaavard Skinnemoen if (status & ATMCI_DATA_ERROR_FLAGS) { 14887d2be074SHaavard Skinnemoen mci_writel(host, IDR, (MCI_NOTBUSY | MCI_TXRDY 14897d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS)); 14907d2be074SHaavard Skinnemoen host->data_status = status; 1491965ebf33SHaavard Skinnemoen data->bytes_xfered += nbytes; 1492965ebf33SHaavard Skinnemoen smp_wmb(); 14937d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 14947d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 1495965ebf33SHaavard Skinnemoen return; 14967d2be074SHaavard Skinnemoen } 14977d2be074SHaavard Skinnemoen } while (status & MCI_TXRDY); 14987d2be074SHaavard Skinnemoen 14997d2be074SHaavard Skinnemoen host->pio_offset = offset; 15007d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 15017d2be074SHaavard Skinnemoen 15027d2be074SHaavard Skinnemoen return; 15037d2be074SHaavard Skinnemoen 15047d2be074SHaavard Skinnemoen done: 15057d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_TXRDY); 15067d2be074SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 15077d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 1508965ebf33SHaavard Skinnemoen smp_wmb(); 1509c06ad258SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 15107d2be074SHaavard Skinnemoen } 15117d2be074SHaavard Skinnemoen 1512965ebf33SHaavard Skinnemoen static void atmci_cmd_interrupt(struct atmel_mci *host, u32 status) 15137d2be074SHaavard Skinnemoen { 15147d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_CMDRDY); 15157d2be074SHaavard Skinnemoen 15167d2be074SHaavard Skinnemoen host->cmd_status = status; 1517965ebf33SHaavard Skinnemoen smp_wmb(); 15187d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_CMD_COMPLETE); 15197d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 15207d2be074SHaavard Skinnemoen } 15217d2be074SHaavard Skinnemoen 152288ff82edSAnders Grahn static void atmci_sdio_interrupt(struct atmel_mci *host, u32 status) 152388ff82edSAnders Grahn { 152488ff82edSAnders Grahn int i; 152588ff82edSAnders Grahn 152688ff82edSAnders Grahn for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) { 152788ff82edSAnders Grahn struct atmel_mci_slot *slot = host->slot[i]; 152888ff82edSAnders Grahn if (slot && (status & slot->sdio_irq)) { 152988ff82edSAnders Grahn mmc_signal_sdio_irq(slot->mmc); 153088ff82edSAnders Grahn } 153188ff82edSAnders Grahn } 153288ff82edSAnders Grahn } 153388ff82edSAnders Grahn 153488ff82edSAnders Grahn 15357d2be074SHaavard Skinnemoen static irqreturn_t atmci_interrupt(int irq, void *dev_id) 15367d2be074SHaavard Skinnemoen { 1537965ebf33SHaavard Skinnemoen struct atmel_mci *host = dev_id; 15387d2be074SHaavard Skinnemoen u32 status, mask, pending; 15397d2be074SHaavard Skinnemoen unsigned int pass_count = 0; 15407d2be074SHaavard Skinnemoen 15417d2be074SHaavard Skinnemoen do { 15427d2be074SHaavard Skinnemoen status = mci_readl(host, SR); 15437d2be074SHaavard Skinnemoen mask = mci_readl(host, IMR); 15447d2be074SHaavard Skinnemoen pending = status & mask; 15457d2be074SHaavard Skinnemoen if (!pending) 15467d2be074SHaavard Skinnemoen break; 15477d2be074SHaavard Skinnemoen 15487d2be074SHaavard Skinnemoen if (pending & ATMCI_DATA_ERROR_FLAGS) { 15497d2be074SHaavard Skinnemoen mci_writel(host, IDR, ATMCI_DATA_ERROR_FLAGS 15507d2be074SHaavard Skinnemoen | MCI_RXRDY | MCI_TXRDY); 15517d2be074SHaavard Skinnemoen pending &= mci_readl(host, IMR); 1552965ebf33SHaavard Skinnemoen 15537d2be074SHaavard Skinnemoen host->data_status = status; 1554965ebf33SHaavard Skinnemoen smp_wmb(); 15557d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 15567d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 15577d2be074SHaavard Skinnemoen } 15587d2be074SHaavard Skinnemoen if (pending & MCI_NOTBUSY) { 1559c06ad258SHaavard Skinnemoen mci_writel(host, IDR, 1560c06ad258SHaavard Skinnemoen ATMCI_DATA_ERROR_FLAGS | MCI_NOTBUSY); 1561ca55f46eSHaavard Skinnemoen if (!host->data_status) 1562c06ad258SHaavard Skinnemoen host->data_status = status; 1563965ebf33SHaavard Skinnemoen smp_wmb(); 15647d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_COMPLETE); 15657d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 15667d2be074SHaavard Skinnemoen } 15677d2be074SHaavard Skinnemoen if (pending & MCI_RXRDY) 15687d2be074SHaavard Skinnemoen atmci_read_data_pio(host); 15697d2be074SHaavard Skinnemoen if (pending & MCI_TXRDY) 15707d2be074SHaavard Skinnemoen atmci_write_data_pio(host); 15717d2be074SHaavard Skinnemoen 15727d2be074SHaavard Skinnemoen if (pending & MCI_CMDRDY) 1573965ebf33SHaavard Skinnemoen atmci_cmd_interrupt(host, status); 157488ff82edSAnders Grahn 157588ff82edSAnders Grahn if (pending & (MCI_SDIOIRQA | MCI_SDIOIRQB)) 157688ff82edSAnders Grahn atmci_sdio_interrupt(host, status); 157788ff82edSAnders Grahn 15787d2be074SHaavard Skinnemoen } while (pass_count++ < 5); 15797d2be074SHaavard Skinnemoen 15807d2be074SHaavard Skinnemoen return pass_count ? IRQ_HANDLED : IRQ_NONE; 15817d2be074SHaavard Skinnemoen } 15827d2be074SHaavard Skinnemoen 15837d2be074SHaavard Skinnemoen static irqreturn_t atmci_detect_interrupt(int irq, void *dev_id) 15847d2be074SHaavard Skinnemoen { 1585965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = dev_id; 15867d2be074SHaavard Skinnemoen 15877d2be074SHaavard Skinnemoen /* 15887d2be074SHaavard Skinnemoen * Disable interrupts until the pin has stabilized and check 15897d2be074SHaavard Skinnemoen * the state then. Use mod_timer() since we may be in the 15907d2be074SHaavard Skinnemoen * middle of the timer routine when this interrupt triggers. 15917d2be074SHaavard Skinnemoen */ 15927d2be074SHaavard Skinnemoen disable_irq_nosync(irq); 1593965ebf33SHaavard Skinnemoen mod_timer(&slot->detect_timer, jiffies + msecs_to_jiffies(20)); 15947d2be074SHaavard Skinnemoen 15957d2be074SHaavard Skinnemoen return IRQ_HANDLED; 15967d2be074SHaavard Skinnemoen } 15977d2be074SHaavard Skinnemoen 1598965ebf33SHaavard Skinnemoen static int __init atmci_init_slot(struct atmel_mci *host, 1599965ebf33SHaavard Skinnemoen struct mci_slot_pdata *slot_data, unsigned int id, 160088ff82edSAnders Grahn u32 sdc_reg, u32 sdio_irq) 1601965ebf33SHaavard Skinnemoen { 1602965ebf33SHaavard Skinnemoen struct mmc_host *mmc; 1603965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot; 1604965ebf33SHaavard Skinnemoen 1605965ebf33SHaavard Skinnemoen mmc = mmc_alloc_host(sizeof(struct atmel_mci_slot), &host->pdev->dev); 1606965ebf33SHaavard Skinnemoen if (!mmc) 1607965ebf33SHaavard Skinnemoen return -ENOMEM; 1608965ebf33SHaavard Skinnemoen 1609965ebf33SHaavard Skinnemoen slot = mmc_priv(mmc); 1610965ebf33SHaavard Skinnemoen slot->mmc = mmc; 1611965ebf33SHaavard Skinnemoen slot->host = host; 1612965ebf33SHaavard Skinnemoen slot->detect_pin = slot_data->detect_pin; 1613965ebf33SHaavard Skinnemoen slot->wp_pin = slot_data->wp_pin; 16141c1452beSJonas Larsson slot->detect_is_active_high = slot_data->detect_is_active_high; 1615965ebf33SHaavard Skinnemoen slot->sdc_reg = sdc_reg; 161688ff82edSAnders Grahn slot->sdio_irq = sdio_irq; 1617965ebf33SHaavard Skinnemoen 1618965ebf33SHaavard Skinnemoen mmc->ops = &atmci_ops; 1619965ebf33SHaavard Skinnemoen mmc->f_min = DIV_ROUND_UP(host->bus_hz, 512); 1620965ebf33SHaavard Skinnemoen mmc->f_max = host->bus_hz / 2; 1621965ebf33SHaavard Skinnemoen mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 162288ff82edSAnders Grahn if (sdio_irq) 162388ff82edSAnders Grahn mmc->caps |= MMC_CAP_SDIO_IRQ; 162499ddffd8SNicolas Ferre if (atmci_is_mci2()) 162599ddffd8SNicolas Ferre mmc->caps |= MMC_CAP_SD_HIGHSPEED; 1626965ebf33SHaavard Skinnemoen if (slot_data->bus_width >= 4) 1627965ebf33SHaavard Skinnemoen mmc->caps |= MMC_CAP_4_BIT_DATA; 1628965ebf33SHaavard Skinnemoen 1629a36274e0SMartin K. Petersen mmc->max_segs = 64; 1630965ebf33SHaavard Skinnemoen mmc->max_req_size = 32768 * 512; 1631965ebf33SHaavard Skinnemoen mmc->max_blk_size = 32768; 1632965ebf33SHaavard Skinnemoen mmc->max_blk_count = 512; 1633965ebf33SHaavard Skinnemoen 1634965ebf33SHaavard Skinnemoen /* Assume card is present initially */ 1635965ebf33SHaavard Skinnemoen set_bit(ATMCI_CARD_PRESENT, &slot->flags); 1636965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 1637965ebf33SHaavard Skinnemoen if (gpio_request(slot->detect_pin, "mmc_detect")) { 1638965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "no detect pin available\n"); 1639965ebf33SHaavard Skinnemoen slot->detect_pin = -EBUSY; 16401c1452beSJonas Larsson } else if (gpio_get_value(slot->detect_pin) ^ 16411c1452beSJonas Larsson slot->detect_is_active_high) { 1642965ebf33SHaavard Skinnemoen clear_bit(ATMCI_CARD_PRESENT, &slot->flags); 1643965ebf33SHaavard Skinnemoen } 1644965ebf33SHaavard Skinnemoen } 1645965ebf33SHaavard Skinnemoen 1646965ebf33SHaavard Skinnemoen if (!gpio_is_valid(slot->detect_pin)) 1647965ebf33SHaavard Skinnemoen mmc->caps |= MMC_CAP_NEEDS_POLL; 1648965ebf33SHaavard Skinnemoen 1649965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->wp_pin)) { 1650965ebf33SHaavard Skinnemoen if (gpio_request(slot->wp_pin, "mmc_wp")) { 1651965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "no WP pin available\n"); 1652965ebf33SHaavard Skinnemoen slot->wp_pin = -EBUSY; 1653965ebf33SHaavard Skinnemoen } 1654965ebf33SHaavard Skinnemoen } 1655965ebf33SHaavard Skinnemoen 1656965ebf33SHaavard Skinnemoen host->slot[id] = slot; 1657965ebf33SHaavard Skinnemoen mmc_add_host(mmc); 1658965ebf33SHaavard Skinnemoen 1659965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 1660965ebf33SHaavard Skinnemoen int ret; 1661965ebf33SHaavard Skinnemoen 1662965ebf33SHaavard Skinnemoen setup_timer(&slot->detect_timer, atmci_detect_change, 1663965ebf33SHaavard Skinnemoen (unsigned long)slot); 1664965ebf33SHaavard Skinnemoen 1665965ebf33SHaavard Skinnemoen ret = request_irq(gpio_to_irq(slot->detect_pin), 1666965ebf33SHaavard Skinnemoen atmci_detect_interrupt, 1667965ebf33SHaavard Skinnemoen IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, 1668965ebf33SHaavard Skinnemoen "mmc-detect", slot); 1669965ebf33SHaavard Skinnemoen if (ret) { 1670965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, 1671965ebf33SHaavard Skinnemoen "could not request IRQ %d for detect pin\n", 1672965ebf33SHaavard Skinnemoen gpio_to_irq(slot->detect_pin)); 1673965ebf33SHaavard Skinnemoen gpio_free(slot->detect_pin); 1674965ebf33SHaavard Skinnemoen slot->detect_pin = -EBUSY; 1675965ebf33SHaavard Skinnemoen } 1676965ebf33SHaavard Skinnemoen } 1677965ebf33SHaavard Skinnemoen 1678965ebf33SHaavard Skinnemoen atmci_init_debugfs(slot); 1679965ebf33SHaavard Skinnemoen 1680965ebf33SHaavard Skinnemoen return 0; 1681965ebf33SHaavard Skinnemoen } 1682965ebf33SHaavard Skinnemoen 1683965ebf33SHaavard Skinnemoen static void __exit atmci_cleanup_slot(struct atmel_mci_slot *slot, 1684965ebf33SHaavard Skinnemoen unsigned int id) 1685965ebf33SHaavard Skinnemoen { 1686965ebf33SHaavard Skinnemoen /* Debugfs stuff is cleaned up by mmc core */ 1687965ebf33SHaavard Skinnemoen 1688965ebf33SHaavard Skinnemoen set_bit(ATMCI_SHUTDOWN, &slot->flags); 1689965ebf33SHaavard Skinnemoen smp_wmb(); 1690965ebf33SHaavard Skinnemoen 1691965ebf33SHaavard Skinnemoen mmc_remove_host(slot->mmc); 1692965ebf33SHaavard Skinnemoen 1693965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 1694965ebf33SHaavard Skinnemoen int pin = slot->detect_pin; 1695965ebf33SHaavard Skinnemoen 1696965ebf33SHaavard Skinnemoen free_irq(gpio_to_irq(pin), slot); 1697965ebf33SHaavard Skinnemoen del_timer_sync(&slot->detect_timer); 1698965ebf33SHaavard Skinnemoen gpio_free(pin); 1699965ebf33SHaavard Skinnemoen } 1700965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->wp_pin)) 1701965ebf33SHaavard Skinnemoen gpio_free(slot->wp_pin); 1702965ebf33SHaavard Skinnemoen 1703965ebf33SHaavard Skinnemoen slot->host->slot[id] = NULL; 1704965ebf33SHaavard Skinnemoen mmc_free_host(slot->mmc); 1705965ebf33SHaavard Skinnemoen } 1706965ebf33SHaavard Skinnemoen 170774465b4fSDan Williams #ifdef CONFIG_MMC_ATMELMCI_DMA 17087dd60251SDan Williams static bool filter(struct dma_chan *chan, void *slave) 170974465b4fSDan Williams { 17102635d1baSNicolas Ferre struct mci_dma_data *sl = slave; 171174465b4fSDan Williams 17122635d1baSNicolas Ferre if (sl && find_slave_dev(sl) == chan->device->dev) { 17132635d1baSNicolas Ferre chan->private = slave_data_ptr(sl); 17147dd60251SDan Williams return true; 17152635d1baSNicolas Ferre } else { 17167dd60251SDan Williams return false; 171774465b4fSDan Williams } 17182635d1baSNicolas Ferre } 17192635d1baSNicolas Ferre 17202635d1baSNicolas Ferre static void atmci_configure_dma(struct atmel_mci *host) 17212635d1baSNicolas Ferre { 17222635d1baSNicolas Ferre struct mci_platform_data *pdata; 17232635d1baSNicolas Ferre 17242635d1baSNicolas Ferre if (host == NULL) 17252635d1baSNicolas Ferre return; 17262635d1baSNicolas Ferre 17272635d1baSNicolas Ferre pdata = host->pdev->dev.platform_data; 17282635d1baSNicolas Ferre 17292635d1baSNicolas Ferre if (pdata && find_slave_dev(pdata->dma_slave)) { 17302635d1baSNicolas Ferre dma_cap_mask_t mask; 17312635d1baSNicolas Ferre 17322635d1baSNicolas Ferre setup_dma_addr(pdata->dma_slave, 17332635d1baSNicolas Ferre host->mapbase + MCI_TDR, 17342635d1baSNicolas Ferre host->mapbase + MCI_RDR); 17352635d1baSNicolas Ferre 17362635d1baSNicolas Ferre /* Try to grab a DMA channel */ 17372635d1baSNicolas Ferre dma_cap_zero(mask); 17382635d1baSNicolas Ferre dma_cap_set(DMA_SLAVE, mask); 17392635d1baSNicolas Ferre host->dma.chan = 17402635d1baSNicolas Ferre dma_request_channel(mask, filter, pdata->dma_slave); 17412635d1baSNicolas Ferre } 17422635d1baSNicolas Ferre if (!host->dma.chan) 17432635d1baSNicolas Ferre dev_notice(&host->pdev->dev, "DMA not available, using PIO\n"); 174474791a2dSNicolas Ferre else 174574791a2dSNicolas Ferre dev_info(&host->pdev->dev, 174674791a2dSNicolas Ferre "Using %s for DMA transfers\n", 174774791a2dSNicolas Ferre dma_chan_name(host->dma.chan)); 17482635d1baSNicolas Ferre } 17492635d1baSNicolas Ferre #else 17502635d1baSNicolas Ferre static void atmci_configure_dma(struct atmel_mci *host) {} 175174465b4fSDan Williams #endif 175274465b4fSDan Williams 17537d2be074SHaavard Skinnemoen static int __init atmci_probe(struct platform_device *pdev) 17547d2be074SHaavard Skinnemoen { 17557d2be074SHaavard Skinnemoen struct mci_platform_data *pdata; 17567d2be074SHaavard Skinnemoen struct atmel_mci *host; 17577d2be074SHaavard Skinnemoen struct resource *regs; 1758965ebf33SHaavard Skinnemoen unsigned int nr_slots; 17597d2be074SHaavard Skinnemoen int irq; 17607d2be074SHaavard Skinnemoen int ret; 17617d2be074SHaavard Skinnemoen 17627d2be074SHaavard Skinnemoen regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 17637d2be074SHaavard Skinnemoen if (!regs) 17647d2be074SHaavard Skinnemoen return -ENXIO; 17657d2be074SHaavard Skinnemoen pdata = pdev->dev.platform_data; 17667d2be074SHaavard Skinnemoen if (!pdata) 17677d2be074SHaavard Skinnemoen return -ENXIO; 17687d2be074SHaavard Skinnemoen irq = platform_get_irq(pdev, 0); 17697d2be074SHaavard Skinnemoen if (irq < 0) 17707d2be074SHaavard Skinnemoen return irq; 17717d2be074SHaavard Skinnemoen 1772965ebf33SHaavard Skinnemoen host = kzalloc(sizeof(struct atmel_mci), GFP_KERNEL); 1773965ebf33SHaavard Skinnemoen if (!host) 17747d2be074SHaavard Skinnemoen return -ENOMEM; 17757d2be074SHaavard Skinnemoen 17767d2be074SHaavard Skinnemoen host->pdev = pdev; 1777965ebf33SHaavard Skinnemoen spin_lock_init(&host->lock); 1778965ebf33SHaavard Skinnemoen INIT_LIST_HEAD(&host->queue); 17797d2be074SHaavard Skinnemoen 17807d2be074SHaavard Skinnemoen host->mck = clk_get(&pdev->dev, "mci_clk"); 17817d2be074SHaavard Skinnemoen if (IS_ERR(host->mck)) { 17827d2be074SHaavard Skinnemoen ret = PTR_ERR(host->mck); 17837d2be074SHaavard Skinnemoen goto err_clk_get; 17847d2be074SHaavard Skinnemoen } 17857d2be074SHaavard Skinnemoen 17867d2be074SHaavard Skinnemoen ret = -ENOMEM; 1787e8e3f6caSH Hartley Sweeten host->regs = ioremap(regs->start, resource_size(regs)); 17887d2be074SHaavard Skinnemoen if (!host->regs) 17897d2be074SHaavard Skinnemoen goto err_ioremap; 17907d2be074SHaavard Skinnemoen 17917d2be074SHaavard Skinnemoen clk_enable(host->mck); 17927d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 17937d2be074SHaavard Skinnemoen host->bus_hz = clk_get_rate(host->mck); 17947d2be074SHaavard Skinnemoen clk_disable(host->mck); 17957d2be074SHaavard Skinnemoen 17967d2be074SHaavard Skinnemoen host->mapbase = regs->start; 17977d2be074SHaavard Skinnemoen 1798965ebf33SHaavard Skinnemoen tasklet_init(&host->tasklet, atmci_tasklet_func, (unsigned long)host); 17997d2be074SHaavard Skinnemoen 180089c8aa20SKay Sievers ret = request_irq(irq, atmci_interrupt, 0, dev_name(&pdev->dev), host); 18017d2be074SHaavard Skinnemoen if (ret) 18027d2be074SHaavard Skinnemoen goto err_request_irq; 18037d2be074SHaavard Skinnemoen 18042635d1baSNicolas Ferre atmci_configure_dma(host); 180565e8b083SHaavard Skinnemoen 18067d2be074SHaavard Skinnemoen platform_set_drvdata(pdev, host); 18077d2be074SHaavard Skinnemoen 1808965ebf33SHaavard Skinnemoen /* We need at least one slot to succeed */ 1809965ebf33SHaavard Skinnemoen nr_slots = 0; 1810965ebf33SHaavard Skinnemoen ret = -ENODEV; 1811965ebf33SHaavard Skinnemoen if (pdata->slot[0].bus_width) { 1812965ebf33SHaavard Skinnemoen ret = atmci_init_slot(host, &pdata->slot[0], 181388ff82edSAnders Grahn 0, MCI_SDCSEL_SLOT_A, MCI_SDIOIRQA); 1814965ebf33SHaavard Skinnemoen if (!ret) 1815965ebf33SHaavard Skinnemoen nr_slots++; 18167d2be074SHaavard Skinnemoen } 1817965ebf33SHaavard Skinnemoen if (pdata->slot[1].bus_width) { 1818965ebf33SHaavard Skinnemoen ret = atmci_init_slot(host, &pdata->slot[1], 181988ff82edSAnders Grahn 1, MCI_SDCSEL_SLOT_B, MCI_SDIOIRQB); 1820965ebf33SHaavard Skinnemoen if (!ret) 1821965ebf33SHaavard Skinnemoen nr_slots++; 18227d2be074SHaavard Skinnemoen } 18237d2be074SHaavard Skinnemoen 182404d699c3SRob Emanuele if (!nr_slots) { 182504d699c3SRob Emanuele dev_err(&pdev->dev, "init failed: no slot defined\n"); 1826965ebf33SHaavard Skinnemoen goto err_init_slot; 182704d699c3SRob Emanuele } 18287d2be074SHaavard Skinnemoen 1829965ebf33SHaavard Skinnemoen dev_info(&pdev->dev, 1830965ebf33SHaavard Skinnemoen "Atmel MCI controller at 0x%08lx irq %d, %u slots\n", 1831965ebf33SHaavard Skinnemoen host->mapbase, irq, nr_slots); 1832deec9ae3SHaavard Skinnemoen 18337d2be074SHaavard Skinnemoen return 0; 18347d2be074SHaavard Skinnemoen 1835965ebf33SHaavard Skinnemoen err_init_slot: 183665e8b083SHaavard Skinnemoen #ifdef CONFIG_MMC_ATMELMCI_DMA 183774465b4fSDan Williams if (host->dma.chan) 183874465b4fSDan Williams dma_release_channel(host->dma.chan); 183965e8b083SHaavard Skinnemoen #endif 1840965ebf33SHaavard Skinnemoen free_irq(irq, host); 18417d2be074SHaavard Skinnemoen err_request_irq: 18427d2be074SHaavard Skinnemoen iounmap(host->regs); 18437d2be074SHaavard Skinnemoen err_ioremap: 18447d2be074SHaavard Skinnemoen clk_put(host->mck); 18457d2be074SHaavard Skinnemoen err_clk_get: 1846965ebf33SHaavard Skinnemoen kfree(host); 18477d2be074SHaavard Skinnemoen return ret; 18487d2be074SHaavard Skinnemoen } 18497d2be074SHaavard Skinnemoen 18507d2be074SHaavard Skinnemoen static int __exit atmci_remove(struct platform_device *pdev) 18517d2be074SHaavard Skinnemoen { 18527d2be074SHaavard Skinnemoen struct atmel_mci *host = platform_get_drvdata(pdev); 1853965ebf33SHaavard Skinnemoen unsigned int i; 18547d2be074SHaavard Skinnemoen 18557d2be074SHaavard Skinnemoen platform_set_drvdata(pdev, NULL); 18567d2be074SHaavard Skinnemoen 1857965ebf33SHaavard Skinnemoen for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) { 1858965ebf33SHaavard Skinnemoen if (host->slot[i]) 1859965ebf33SHaavard Skinnemoen atmci_cleanup_slot(host->slot[i], i); 18607d2be074SHaavard Skinnemoen } 18617d2be074SHaavard Skinnemoen 18627d2be074SHaavard Skinnemoen clk_enable(host->mck); 18637d2be074SHaavard Skinnemoen mci_writel(host, IDR, ~0UL); 18647d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIDIS); 18657d2be074SHaavard Skinnemoen mci_readl(host, SR); 18667d2be074SHaavard Skinnemoen clk_disable(host->mck); 18677d2be074SHaavard Skinnemoen 186865e8b083SHaavard Skinnemoen #ifdef CONFIG_MMC_ATMELMCI_DMA 186974465b4fSDan Williams if (host->dma.chan) 187074465b4fSDan Williams dma_release_channel(host->dma.chan); 187165e8b083SHaavard Skinnemoen #endif 187265e8b083SHaavard Skinnemoen 1873965ebf33SHaavard Skinnemoen free_irq(platform_get_irq(pdev, 0), host); 18747d2be074SHaavard Skinnemoen iounmap(host->regs); 18757d2be074SHaavard Skinnemoen 18767d2be074SHaavard Skinnemoen clk_put(host->mck); 1877965ebf33SHaavard Skinnemoen kfree(host); 18787d2be074SHaavard Skinnemoen 18797d2be074SHaavard Skinnemoen return 0; 18807d2be074SHaavard Skinnemoen } 18817d2be074SHaavard Skinnemoen 18827d2be074SHaavard Skinnemoen static struct platform_driver atmci_driver = { 18837d2be074SHaavard Skinnemoen .remove = __exit_p(atmci_remove), 18847d2be074SHaavard Skinnemoen .driver = { 18857d2be074SHaavard Skinnemoen .name = "atmel_mci", 18867d2be074SHaavard Skinnemoen }, 18877d2be074SHaavard Skinnemoen }; 18887d2be074SHaavard Skinnemoen 18897d2be074SHaavard Skinnemoen static int __init atmci_init(void) 18907d2be074SHaavard Skinnemoen { 18917d2be074SHaavard Skinnemoen return platform_driver_probe(&atmci_driver, atmci_probe); 18927d2be074SHaavard Skinnemoen } 18937d2be074SHaavard Skinnemoen 18947d2be074SHaavard Skinnemoen static void __exit atmci_exit(void) 18957d2be074SHaavard Skinnemoen { 18967d2be074SHaavard Skinnemoen platform_driver_unregister(&atmci_driver); 18977d2be074SHaavard Skinnemoen } 18987d2be074SHaavard Skinnemoen 189974465b4fSDan Williams late_initcall(atmci_init); /* try to load after dma driver when built-in */ 19007d2be074SHaavard Skinnemoen module_exit(atmci_exit); 19017d2be074SHaavard Skinnemoen 19027d2be074SHaavard Skinnemoen MODULE_DESCRIPTION("Atmel Multimedia Card Interface driver"); 19037d2be074SHaavard Skinnemoen MODULE_AUTHOR("Haavard Skinnemoen <haavard.skinnemoen@atmel.com>"); 19047d2be074SHaavard Skinnemoen MODULE_LICENSE("GPL v2"); 1905