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> 25deec9ae3SHaavard Skinnemoen #include <linux/stat.h> 267d2be074SHaavard Skinnemoen 277d2be074SHaavard Skinnemoen #include <linux/mmc/host.h> 282635d1baSNicolas Ferre 292635d1baSNicolas Ferre #include <mach/atmel-mci.h> 30c42aa775SNicolas Ferre #include <linux/atmel-mci.h> 317d2be074SHaavard Skinnemoen 327d2be074SHaavard Skinnemoen #include <asm/io.h> 337d2be074SHaavard Skinnemoen #include <asm/unaligned.h> 347d2be074SHaavard Skinnemoen 3504d699c3SRob Emanuele #include <mach/cpu.h> 363663b736SHaavard Skinnemoen #include <mach/board.h> 377d2be074SHaavard Skinnemoen 387d2be074SHaavard Skinnemoen #include "atmel-mci-regs.h" 397d2be074SHaavard Skinnemoen 407d2be074SHaavard Skinnemoen #define ATMCI_DATA_ERROR_FLAGS (MCI_DCRCE | MCI_DTOE | MCI_OVRE | MCI_UNRE) 4165e8b083SHaavard Skinnemoen #define ATMCI_DMA_THRESHOLD 16 427d2be074SHaavard Skinnemoen 437d2be074SHaavard Skinnemoen enum { 447d2be074SHaavard Skinnemoen EVENT_CMD_COMPLETE = 0, 457d2be074SHaavard Skinnemoen EVENT_XFER_COMPLETE, 46c06ad258SHaavard Skinnemoen EVENT_DATA_COMPLETE, 47c06ad258SHaavard Skinnemoen EVENT_DATA_ERROR, 48c06ad258SHaavard Skinnemoen }; 49c06ad258SHaavard Skinnemoen 50c06ad258SHaavard Skinnemoen enum atmel_mci_state { 51965ebf33SHaavard Skinnemoen STATE_IDLE = 0, 52965ebf33SHaavard Skinnemoen STATE_SENDING_CMD, 53c06ad258SHaavard Skinnemoen STATE_SENDING_DATA, 54c06ad258SHaavard Skinnemoen STATE_DATA_BUSY, 55c06ad258SHaavard Skinnemoen STATE_SENDING_STOP, 56c06ad258SHaavard Skinnemoen STATE_DATA_ERROR, 577d2be074SHaavard Skinnemoen }; 587d2be074SHaavard Skinnemoen 5965e8b083SHaavard Skinnemoen struct atmel_mci_dma { 6065e8b083SHaavard Skinnemoen #ifdef CONFIG_MMC_ATMELMCI_DMA 6165e8b083SHaavard Skinnemoen struct dma_chan *chan; 6265e8b083SHaavard Skinnemoen struct dma_async_tx_descriptor *data_desc; 6365e8b083SHaavard Skinnemoen #endif 6465e8b083SHaavard Skinnemoen }; 6565e8b083SHaavard Skinnemoen 66965ebf33SHaavard Skinnemoen /** 67965ebf33SHaavard Skinnemoen * struct atmel_mci - MMC controller state shared between all slots 68965ebf33SHaavard Skinnemoen * @lock: Spinlock protecting the queue and associated data. 69965ebf33SHaavard Skinnemoen * @regs: Pointer to MMIO registers. 70965ebf33SHaavard Skinnemoen * @sg: Scatterlist entry currently being processed by PIO code, if any. 71965ebf33SHaavard Skinnemoen * @pio_offset: Offset into the current scatterlist entry. 72965ebf33SHaavard Skinnemoen * @cur_slot: The slot which is currently using the controller. 73965ebf33SHaavard Skinnemoen * @mrq: The request currently being processed on @cur_slot, 74965ebf33SHaavard Skinnemoen * or NULL if the controller is idle. 75965ebf33SHaavard Skinnemoen * @cmd: The command currently being sent to the card, or NULL. 76965ebf33SHaavard Skinnemoen * @data: The data currently being transferred, or NULL if no data 77965ebf33SHaavard Skinnemoen * transfer is in progress. 7865e8b083SHaavard Skinnemoen * @dma: DMA client state. 7965e8b083SHaavard Skinnemoen * @data_chan: DMA channel being used for the current data transfer. 80965ebf33SHaavard Skinnemoen * @cmd_status: Snapshot of SR taken upon completion of the current 81965ebf33SHaavard Skinnemoen * command. Only valid when EVENT_CMD_COMPLETE is pending. 82965ebf33SHaavard Skinnemoen * @data_status: Snapshot of SR taken upon completion of the current 83965ebf33SHaavard Skinnemoen * data transfer. Only valid when EVENT_DATA_COMPLETE or 84965ebf33SHaavard Skinnemoen * EVENT_DATA_ERROR is pending. 85965ebf33SHaavard Skinnemoen * @stop_cmdr: Value to be loaded into CMDR when the stop command is 86965ebf33SHaavard Skinnemoen * to be sent. 87965ebf33SHaavard Skinnemoen * @tasklet: Tasklet running the request state machine. 88965ebf33SHaavard Skinnemoen * @pending_events: Bitmask of events flagged by the interrupt handler 89965ebf33SHaavard Skinnemoen * to be processed by the tasklet. 90965ebf33SHaavard Skinnemoen * @completed_events: Bitmask of events which the state machine has 91965ebf33SHaavard Skinnemoen * processed. 92965ebf33SHaavard Skinnemoen * @state: Tasklet state. 93965ebf33SHaavard Skinnemoen * @queue: List of slots waiting for access to the controller. 94965ebf33SHaavard Skinnemoen * @need_clock_update: Update the clock rate before the next request. 95965ebf33SHaavard Skinnemoen * @need_reset: Reset controller before next request. 96965ebf33SHaavard Skinnemoen * @mode_reg: Value of the MR register. 9774791a2dSNicolas Ferre * @cfg_reg: Value of the CFG register. 98965ebf33SHaavard Skinnemoen * @bus_hz: The rate of @mck in Hz. This forms the basis for MMC bus 99965ebf33SHaavard Skinnemoen * rate and timeout calculations. 100965ebf33SHaavard Skinnemoen * @mapbase: Physical address of the MMIO registers. 101965ebf33SHaavard Skinnemoen * @mck: The peripheral bus clock hooked up to the MMC controller. 102965ebf33SHaavard Skinnemoen * @pdev: Platform device associated with the MMC controller. 103965ebf33SHaavard Skinnemoen * @slot: Slots sharing this MMC controller. 104965ebf33SHaavard Skinnemoen * 105965ebf33SHaavard Skinnemoen * Locking 106965ebf33SHaavard Skinnemoen * ======= 107965ebf33SHaavard Skinnemoen * 108965ebf33SHaavard Skinnemoen * @lock is a softirq-safe spinlock protecting @queue as well as 109965ebf33SHaavard Skinnemoen * @cur_slot, @mrq and @state. These must always be updated 110965ebf33SHaavard Skinnemoen * at the same time while holding @lock. 111965ebf33SHaavard Skinnemoen * 112965ebf33SHaavard Skinnemoen * @lock also protects mode_reg and need_clock_update since these are 113965ebf33SHaavard Skinnemoen * used to synchronize mode register updates with the queue 114965ebf33SHaavard Skinnemoen * processing. 115965ebf33SHaavard Skinnemoen * 116965ebf33SHaavard Skinnemoen * The @mrq field of struct atmel_mci_slot is also protected by @lock, 117965ebf33SHaavard Skinnemoen * and must always be written at the same time as the slot is added to 118965ebf33SHaavard Skinnemoen * @queue. 119965ebf33SHaavard Skinnemoen * 120965ebf33SHaavard Skinnemoen * @pending_events and @completed_events are accessed using atomic bit 121965ebf33SHaavard Skinnemoen * operations, so they don't need any locking. 122965ebf33SHaavard Skinnemoen * 123965ebf33SHaavard Skinnemoen * None of the fields touched by the interrupt handler need any 124965ebf33SHaavard Skinnemoen * locking. However, ordering is important: Before EVENT_DATA_ERROR or 125965ebf33SHaavard Skinnemoen * EVENT_DATA_COMPLETE is set in @pending_events, all data-related 126965ebf33SHaavard Skinnemoen * interrupts must be disabled and @data_status updated with a 127965ebf33SHaavard Skinnemoen * snapshot of SR. Similarly, before EVENT_CMD_COMPLETE is set, the 128965ebf33SHaavard Skinnemoen * CMDRDY interupt must be disabled and @cmd_status updated with a 129965ebf33SHaavard Skinnemoen * snapshot of SR, and before EVENT_XFER_COMPLETE can be set, the 130965ebf33SHaavard Skinnemoen * bytes_xfered field of @data must be written. This is ensured by 131965ebf33SHaavard Skinnemoen * using barriers. 132965ebf33SHaavard Skinnemoen */ 1337d2be074SHaavard Skinnemoen struct atmel_mci { 134965ebf33SHaavard Skinnemoen spinlock_t lock; 1357d2be074SHaavard Skinnemoen void __iomem *regs; 1367d2be074SHaavard Skinnemoen 1377d2be074SHaavard Skinnemoen struct scatterlist *sg; 1387d2be074SHaavard Skinnemoen unsigned int pio_offset; 1397d2be074SHaavard Skinnemoen 140965ebf33SHaavard Skinnemoen struct atmel_mci_slot *cur_slot; 1417d2be074SHaavard Skinnemoen struct mmc_request *mrq; 1427d2be074SHaavard Skinnemoen struct mmc_command *cmd; 1437d2be074SHaavard Skinnemoen struct mmc_data *data; 1447d2be074SHaavard Skinnemoen 14565e8b083SHaavard Skinnemoen struct atmel_mci_dma dma; 14665e8b083SHaavard Skinnemoen struct dma_chan *data_chan; 14765e8b083SHaavard Skinnemoen 1487d2be074SHaavard Skinnemoen u32 cmd_status; 1497d2be074SHaavard Skinnemoen u32 data_status; 1507d2be074SHaavard Skinnemoen u32 stop_cmdr; 1517d2be074SHaavard Skinnemoen 1527d2be074SHaavard Skinnemoen struct tasklet_struct tasklet; 1537d2be074SHaavard Skinnemoen unsigned long pending_events; 1547d2be074SHaavard Skinnemoen unsigned long completed_events; 155c06ad258SHaavard Skinnemoen enum atmel_mci_state state; 156965ebf33SHaavard Skinnemoen struct list_head queue; 1577d2be074SHaavard Skinnemoen 158965ebf33SHaavard Skinnemoen bool need_clock_update; 159965ebf33SHaavard Skinnemoen bool need_reset; 160965ebf33SHaavard Skinnemoen u32 mode_reg; 16174791a2dSNicolas Ferre u32 cfg_reg; 1627d2be074SHaavard Skinnemoen unsigned long bus_hz; 1637d2be074SHaavard Skinnemoen unsigned long mapbase; 1647d2be074SHaavard Skinnemoen struct clk *mck; 1657d2be074SHaavard Skinnemoen struct platform_device *pdev; 166965ebf33SHaavard Skinnemoen 167965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot[ATMEL_MCI_MAX_NR_SLOTS]; 168965ebf33SHaavard Skinnemoen }; 169965ebf33SHaavard Skinnemoen 170965ebf33SHaavard Skinnemoen /** 171965ebf33SHaavard Skinnemoen * struct atmel_mci_slot - MMC slot state 172965ebf33SHaavard Skinnemoen * @mmc: The mmc_host representing this slot. 173965ebf33SHaavard Skinnemoen * @host: The MMC controller this slot is using. 174965ebf33SHaavard Skinnemoen * @sdc_reg: Value of SDCR to be written before using this slot. 175965ebf33SHaavard Skinnemoen * @mrq: mmc_request currently being processed or waiting to be 176965ebf33SHaavard Skinnemoen * processed, or NULL when the slot is idle. 177965ebf33SHaavard Skinnemoen * @queue_node: List node for placing this node in the @queue list of 178965ebf33SHaavard Skinnemoen * &struct atmel_mci. 179965ebf33SHaavard Skinnemoen * @clock: Clock rate configured by set_ios(). Protected by host->lock. 180965ebf33SHaavard Skinnemoen * @flags: Random state bits associated with the slot. 181965ebf33SHaavard Skinnemoen * @detect_pin: GPIO pin used for card detection, or negative if not 182965ebf33SHaavard Skinnemoen * available. 183965ebf33SHaavard Skinnemoen * @wp_pin: GPIO pin used for card write protect sending, or negative 184965ebf33SHaavard Skinnemoen * if not available. 1851c1452beSJonas Larsson * @detect_is_active_high: The state of the detect pin when it is active. 186965ebf33SHaavard Skinnemoen * @detect_timer: Timer used for debouncing @detect_pin interrupts. 187965ebf33SHaavard Skinnemoen */ 188965ebf33SHaavard Skinnemoen struct atmel_mci_slot { 189965ebf33SHaavard Skinnemoen struct mmc_host *mmc; 190965ebf33SHaavard Skinnemoen struct atmel_mci *host; 191965ebf33SHaavard Skinnemoen 192965ebf33SHaavard Skinnemoen u32 sdc_reg; 193965ebf33SHaavard Skinnemoen 194965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 195965ebf33SHaavard Skinnemoen struct list_head queue_node; 196965ebf33SHaavard Skinnemoen 197965ebf33SHaavard Skinnemoen unsigned int clock; 198965ebf33SHaavard Skinnemoen unsigned long flags; 199965ebf33SHaavard Skinnemoen #define ATMCI_CARD_PRESENT 0 200965ebf33SHaavard Skinnemoen #define ATMCI_CARD_NEED_INIT 1 201965ebf33SHaavard Skinnemoen #define ATMCI_SHUTDOWN 2 202965ebf33SHaavard Skinnemoen 203965ebf33SHaavard Skinnemoen int detect_pin; 204965ebf33SHaavard Skinnemoen int wp_pin; 2051c1452beSJonas Larsson bool detect_is_active_high; 206965ebf33SHaavard Skinnemoen 207965ebf33SHaavard Skinnemoen struct timer_list detect_timer; 2087d2be074SHaavard Skinnemoen }; 2097d2be074SHaavard Skinnemoen 2107d2be074SHaavard Skinnemoen #define atmci_test_and_clear_pending(host, event) \ 2117d2be074SHaavard Skinnemoen test_and_clear_bit(event, &host->pending_events) 2127d2be074SHaavard Skinnemoen #define atmci_set_completed(host, event) \ 2137d2be074SHaavard Skinnemoen set_bit(event, &host->completed_events) 2147d2be074SHaavard Skinnemoen #define atmci_set_pending(host, event) \ 2157d2be074SHaavard Skinnemoen set_bit(event, &host->pending_events) 2167d2be074SHaavard Skinnemoen 217deec9ae3SHaavard Skinnemoen /* 21804d699c3SRob Emanuele * Enable or disable features/registers based on 21904d699c3SRob Emanuele * whether the processor supports them 22004d699c3SRob Emanuele */ 22104d699c3SRob Emanuele static bool mci_has_rwproof(void) 22204d699c3SRob Emanuele { 22304d699c3SRob Emanuele if (cpu_is_at91sam9261() || cpu_is_at91rm9200()) 22404d699c3SRob Emanuele return false; 22504d699c3SRob Emanuele else 22604d699c3SRob Emanuele return true; 22704d699c3SRob Emanuele } 22804d699c3SRob Emanuele 22904d699c3SRob Emanuele /* 23074791a2dSNicolas Ferre * The new MCI2 module isn't 100% compatible with the old MCI module, 23174791a2dSNicolas Ferre * and it has a few nice features which we want to use... 23274791a2dSNicolas Ferre */ 23374791a2dSNicolas Ferre static inline bool atmci_is_mci2(void) 23474791a2dSNicolas Ferre { 23574791a2dSNicolas Ferre if (cpu_is_at91sam9g45()) 23674791a2dSNicolas Ferre return true; 23774791a2dSNicolas Ferre 23874791a2dSNicolas Ferre return false; 23974791a2dSNicolas Ferre } 24074791a2dSNicolas Ferre 24174791a2dSNicolas Ferre 24274791a2dSNicolas Ferre /* 243deec9ae3SHaavard Skinnemoen * The debugfs stuff below is mostly optimized away when 244deec9ae3SHaavard Skinnemoen * CONFIG_DEBUG_FS is not set. 245deec9ae3SHaavard Skinnemoen */ 246deec9ae3SHaavard Skinnemoen static int atmci_req_show(struct seq_file *s, void *v) 247deec9ae3SHaavard Skinnemoen { 248965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = s->private; 249965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 250deec9ae3SHaavard Skinnemoen struct mmc_command *cmd; 251deec9ae3SHaavard Skinnemoen struct mmc_command *stop; 252deec9ae3SHaavard Skinnemoen struct mmc_data *data; 253deec9ae3SHaavard Skinnemoen 254deec9ae3SHaavard Skinnemoen /* Make sure we get a consistent snapshot */ 255965ebf33SHaavard Skinnemoen spin_lock_bh(&slot->host->lock); 256965ebf33SHaavard Skinnemoen mrq = slot->mrq; 257deec9ae3SHaavard Skinnemoen 258deec9ae3SHaavard Skinnemoen if (mrq) { 259deec9ae3SHaavard Skinnemoen cmd = mrq->cmd; 260deec9ae3SHaavard Skinnemoen data = mrq->data; 261deec9ae3SHaavard Skinnemoen stop = mrq->stop; 262deec9ae3SHaavard Skinnemoen 263deec9ae3SHaavard Skinnemoen if (cmd) 264deec9ae3SHaavard Skinnemoen seq_printf(s, 265deec9ae3SHaavard Skinnemoen "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 266deec9ae3SHaavard Skinnemoen cmd->opcode, cmd->arg, cmd->flags, 267deec9ae3SHaavard Skinnemoen cmd->resp[0], cmd->resp[1], cmd->resp[2], 268deec9ae3SHaavard Skinnemoen cmd->resp[2], cmd->error); 269deec9ae3SHaavard Skinnemoen if (data) 270deec9ae3SHaavard Skinnemoen seq_printf(s, "DATA %u / %u * %u flg %x err %d\n", 271deec9ae3SHaavard Skinnemoen data->bytes_xfered, data->blocks, 272deec9ae3SHaavard Skinnemoen data->blksz, data->flags, data->error); 273deec9ae3SHaavard Skinnemoen if (stop) 274deec9ae3SHaavard Skinnemoen seq_printf(s, 275deec9ae3SHaavard Skinnemoen "CMD%u(0x%x) flg %x rsp %x %x %x %x err %d\n", 276deec9ae3SHaavard Skinnemoen stop->opcode, stop->arg, stop->flags, 277deec9ae3SHaavard Skinnemoen stop->resp[0], stop->resp[1], stop->resp[2], 278deec9ae3SHaavard Skinnemoen stop->resp[2], stop->error); 279deec9ae3SHaavard Skinnemoen } 280deec9ae3SHaavard Skinnemoen 281965ebf33SHaavard Skinnemoen spin_unlock_bh(&slot->host->lock); 282deec9ae3SHaavard Skinnemoen 283deec9ae3SHaavard Skinnemoen return 0; 284deec9ae3SHaavard Skinnemoen } 285deec9ae3SHaavard Skinnemoen 286deec9ae3SHaavard Skinnemoen static int atmci_req_open(struct inode *inode, struct file *file) 287deec9ae3SHaavard Skinnemoen { 288deec9ae3SHaavard Skinnemoen return single_open(file, atmci_req_show, inode->i_private); 289deec9ae3SHaavard Skinnemoen } 290deec9ae3SHaavard Skinnemoen 291deec9ae3SHaavard Skinnemoen static const struct file_operations atmci_req_fops = { 292deec9ae3SHaavard Skinnemoen .owner = THIS_MODULE, 293deec9ae3SHaavard Skinnemoen .open = atmci_req_open, 294deec9ae3SHaavard Skinnemoen .read = seq_read, 295deec9ae3SHaavard Skinnemoen .llseek = seq_lseek, 296deec9ae3SHaavard Skinnemoen .release = single_release, 297deec9ae3SHaavard Skinnemoen }; 298deec9ae3SHaavard Skinnemoen 299deec9ae3SHaavard Skinnemoen static void atmci_show_status_reg(struct seq_file *s, 300deec9ae3SHaavard Skinnemoen const char *regname, u32 value) 301deec9ae3SHaavard Skinnemoen { 302deec9ae3SHaavard Skinnemoen static const char *sr_bit[] = { 303deec9ae3SHaavard Skinnemoen [0] = "CMDRDY", 304deec9ae3SHaavard Skinnemoen [1] = "RXRDY", 305deec9ae3SHaavard Skinnemoen [2] = "TXRDY", 306deec9ae3SHaavard Skinnemoen [3] = "BLKE", 307deec9ae3SHaavard Skinnemoen [4] = "DTIP", 308deec9ae3SHaavard Skinnemoen [5] = "NOTBUSY", 30904d699c3SRob Emanuele [6] = "ENDRX", 31004d699c3SRob Emanuele [7] = "ENDTX", 311deec9ae3SHaavard Skinnemoen [8] = "SDIOIRQA", 312deec9ae3SHaavard Skinnemoen [9] = "SDIOIRQB", 31304d699c3SRob Emanuele [12] = "SDIOWAIT", 31404d699c3SRob Emanuele [14] = "RXBUFF", 31504d699c3SRob Emanuele [15] = "TXBUFE", 316deec9ae3SHaavard Skinnemoen [16] = "RINDE", 317deec9ae3SHaavard Skinnemoen [17] = "RDIRE", 318deec9ae3SHaavard Skinnemoen [18] = "RCRCE", 319deec9ae3SHaavard Skinnemoen [19] = "RENDE", 320deec9ae3SHaavard Skinnemoen [20] = "RTOE", 321deec9ae3SHaavard Skinnemoen [21] = "DCRCE", 322deec9ae3SHaavard Skinnemoen [22] = "DTOE", 32304d699c3SRob Emanuele [23] = "CSTOE", 32404d699c3SRob Emanuele [24] = "BLKOVRE", 32504d699c3SRob Emanuele [25] = "DMADONE", 32604d699c3SRob Emanuele [26] = "FIFOEMPTY", 32704d699c3SRob Emanuele [27] = "XFRDONE", 328deec9ae3SHaavard Skinnemoen [30] = "OVRE", 329deec9ae3SHaavard Skinnemoen [31] = "UNRE", 330deec9ae3SHaavard Skinnemoen }; 331deec9ae3SHaavard Skinnemoen unsigned int i; 332deec9ae3SHaavard Skinnemoen 333deec9ae3SHaavard Skinnemoen seq_printf(s, "%s:\t0x%08x", regname, value); 334deec9ae3SHaavard Skinnemoen for (i = 0; i < ARRAY_SIZE(sr_bit); i++) { 335deec9ae3SHaavard Skinnemoen if (value & (1 << i)) { 336deec9ae3SHaavard Skinnemoen if (sr_bit[i]) 337deec9ae3SHaavard Skinnemoen seq_printf(s, " %s", sr_bit[i]); 338deec9ae3SHaavard Skinnemoen else 339deec9ae3SHaavard Skinnemoen seq_puts(s, " UNKNOWN"); 340deec9ae3SHaavard Skinnemoen } 341deec9ae3SHaavard Skinnemoen } 342deec9ae3SHaavard Skinnemoen seq_putc(s, '\n'); 343deec9ae3SHaavard Skinnemoen } 344deec9ae3SHaavard Skinnemoen 345deec9ae3SHaavard Skinnemoen static int atmci_regs_show(struct seq_file *s, void *v) 346deec9ae3SHaavard Skinnemoen { 347deec9ae3SHaavard Skinnemoen struct atmel_mci *host = s->private; 348deec9ae3SHaavard Skinnemoen u32 *buf; 349deec9ae3SHaavard Skinnemoen 350deec9ae3SHaavard Skinnemoen buf = kmalloc(MCI_REGS_SIZE, GFP_KERNEL); 351deec9ae3SHaavard Skinnemoen if (!buf) 352deec9ae3SHaavard Skinnemoen return -ENOMEM; 353deec9ae3SHaavard Skinnemoen 354965ebf33SHaavard Skinnemoen /* 355965ebf33SHaavard Skinnemoen * Grab a more or less consistent snapshot. Note that we're 356965ebf33SHaavard Skinnemoen * not disabling interrupts, so IMR and SR may not be 357965ebf33SHaavard Skinnemoen * consistent. 358965ebf33SHaavard Skinnemoen */ 359965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 36087e60f2bSHaavard Skinnemoen clk_enable(host->mck); 361deec9ae3SHaavard Skinnemoen memcpy_fromio(buf, host->regs, MCI_REGS_SIZE); 36287e60f2bSHaavard Skinnemoen clk_disable(host->mck); 363965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 364deec9ae3SHaavard Skinnemoen 365deec9ae3SHaavard Skinnemoen seq_printf(s, "MR:\t0x%08x%s%s CLKDIV=%u\n", 366deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4], 367deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4] & MCI_MR_RDPROOF ? " RDPROOF" : "", 368deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4] & MCI_MR_WRPROOF ? " WRPROOF" : "", 369deec9ae3SHaavard Skinnemoen buf[MCI_MR / 4] & 0xff); 370deec9ae3SHaavard Skinnemoen seq_printf(s, "DTOR:\t0x%08x\n", buf[MCI_DTOR / 4]); 371deec9ae3SHaavard Skinnemoen seq_printf(s, "SDCR:\t0x%08x\n", buf[MCI_SDCR / 4]); 372deec9ae3SHaavard Skinnemoen seq_printf(s, "ARGR:\t0x%08x\n", buf[MCI_ARGR / 4]); 373deec9ae3SHaavard Skinnemoen seq_printf(s, "BLKR:\t0x%08x BCNT=%u BLKLEN=%u\n", 374deec9ae3SHaavard Skinnemoen buf[MCI_BLKR / 4], 375deec9ae3SHaavard Skinnemoen buf[MCI_BLKR / 4] & 0xffff, 376deec9ae3SHaavard Skinnemoen (buf[MCI_BLKR / 4] >> 16) & 0xffff); 37774791a2dSNicolas Ferre if (atmci_is_mci2()) 37874791a2dSNicolas Ferre seq_printf(s, "CSTOR:\t0x%08x\n", buf[MCI_CSTOR / 4]); 379deec9ae3SHaavard Skinnemoen 380deec9ae3SHaavard Skinnemoen /* Don't read RSPR and RDR; it will consume the data there */ 381deec9ae3SHaavard Skinnemoen 382deec9ae3SHaavard Skinnemoen atmci_show_status_reg(s, "SR", buf[MCI_SR / 4]); 383deec9ae3SHaavard Skinnemoen atmci_show_status_reg(s, "IMR", buf[MCI_IMR / 4]); 384deec9ae3SHaavard Skinnemoen 38574791a2dSNicolas Ferre if (atmci_is_mci2()) { 38674791a2dSNicolas Ferre u32 val; 38774791a2dSNicolas Ferre 38874791a2dSNicolas Ferre val = buf[MCI_DMA / 4]; 38974791a2dSNicolas Ferre seq_printf(s, "DMA:\t0x%08x OFFSET=%u CHKSIZE=%u%s\n", 39074791a2dSNicolas Ferre val, val & 3, 39174791a2dSNicolas Ferre ((val >> 4) & 3) ? 39274791a2dSNicolas Ferre 1 << (((val >> 4) & 3) + 1) : 1, 39374791a2dSNicolas Ferre val & MCI_DMAEN ? " DMAEN" : ""); 39474791a2dSNicolas Ferre 39574791a2dSNicolas Ferre val = buf[MCI_CFG / 4]; 39674791a2dSNicolas Ferre seq_printf(s, "CFG:\t0x%08x%s%s%s%s\n", 39774791a2dSNicolas Ferre val, 39874791a2dSNicolas Ferre val & MCI_CFG_FIFOMODE_1DATA ? " FIFOMODE_ONE_DATA" : "", 39974791a2dSNicolas Ferre val & MCI_CFG_FERRCTRL_COR ? " FERRCTRL_CLEAR_ON_READ" : "", 40074791a2dSNicolas Ferre val & MCI_CFG_HSMODE ? " HSMODE" : "", 40174791a2dSNicolas Ferre val & MCI_CFG_LSYNC ? " LSYNC" : ""); 40274791a2dSNicolas Ferre } 40374791a2dSNicolas Ferre 404b17339a1SHaavard Skinnemoen kfree(buf); 405b17339a1SHaavard Skinnemoen 406deec9ae3SHaavard Skinnemoen return 0; 407deec9ae3SHaavard Skinnemoen } 408deec9ae3SHaavard Skinnemoen 409deec9ae3SHaavard Skinnemoen static int atmci_regs_open(struct inode *inode, struct file *file) 410deec9ae3SHaavard Skinnemoen { 411deec9ae3SHaavard Skinnemoen return single_open(file, atmci_regs_show, inode->i_private); 412deec9ae3SHaavard Skinnemoen } 413deec9ae3SHaavard Skinnemoen 414deec9ae3SHaavard Skinnemoen static const struct file_operations atmci_regs_fops = { 415deec9ae3SHaavard Skinnemoen .owner = THIS_MODULE, 416deec9ae3SHaavard Skinnemoen .open = atmci_regs_open, 417deec9ae3SHaavard Skinnemoen .read = seq_read, 418deec9ae3SHaavard Skinnemoen .llseek = seq_lseek, 419deec9ae3SHaavard Skinnemoen .release = single_release, 420deec9ae3SHaavard Skinnemoen }; 421deec9ae3SHaavard Skinnemoen 422965ebf33SHaavard Skinnemoen static void atmci_init_debugfs(struct atmel_mci_slot *slot) 423deec9ae3SHaavard Skinnemoen { 424965ebf33SHaavard Skinnemoen struct mmc_host *mmc = slot->mmc; 425965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 426deec9ae3SHaavard Skinnemoen struct dentry *root; 427deec9ae3SHaavard Skinnemoen struct dentry *node; 428deec9ae3SHaavard Skinnemoen 429deec9ae3SHaavard Skinnemoen root = mmc->debugfs_root; 430deec9ae3SHaavard Skinnemoen if (!root) 431deec9ae3SHaavard Skinnemoen return; 432deec9ae3SHaavard Skinnemoen 433deec9ae3SHaavard Skinnemoen node = debugfs_create_file("regs", S_IRUSR, root, host, 434deec9ae3SHaavard Skinnemoen &atmci_regs_fops); 435deec9ae3SHaavard Skinnemoen if (IS_ERR(node)) 436deec9ae3SHaavard Skinnemoen return; 437deec9ae3SHaavard Skinnemoen if (!node) 438deec9ae3SHaavard Skinnemoen goto err; 439deec9ae3SHaavard Skinnemoen 440965ebf33SHaavard Skinnemoen node = debugfs_create_file("req", S_IRUSR, root, slot, &atmci_req_fops); 441deec9ae3SHaavard Skinnemoen if (!node) 442deec9ae3SHaavard Skinnemoen goto err; 443deec9ae3SHaavard Skinnemoen 444c06ad258SHaavard Skinnemoen node = debugfs_create_u32("state", S_IRUSR, root, (u32 *)&host->state); 445c06ad258SHaavard Skinnemoen if (!node) 446c06ad258SHaavard Skinnemoen goto err; 447c06ad258SHaavard Skinnemoen 448deec9ae3SHaavard Skinnemoen node = debugfs_create_x32("pending_events", S_IRUSR, root, 449deec9ae3SHaavard Skinnemoen (u32 *)&host->pending_events); 450deec9ae3SHaavard Skinnemoen if (!node) 451deec9ae3SHaavard Skinnemoen goto err; 452deec9ae3SHaavard Skinnemoen 453deec9ae3SHaavard Skinnemoen node = debugfs_create_x32("completed_events", S_IRUSR, root, 454deec9ae3SHaavard Skinnemoen (u32 *)&host->completed_events); 455deec9ae3SHaavard Skinnemoen if (!node) 456deec9ae3SHaavard Skinnemoen goto err; 457deec9ae3SHaavard Skinnemoen 458deec9ae3SHaavard Skinnemoen return; 459deec9ae3SHaavard Skinnemoen 460deec9ae3SHaavard Skinnemoen err: 461965ebf33SHaavard Skinnemoen dev_err(&mmc->class_dev, "failed to initialize debugfs for slot\n"); 462deec9ae3SHaavard Skinnemoen } 4637d2be074SHaavard Skinnemoen 4647d2be074SHaavard Skinnemoen static inline unsigned int ns_to_clocks(struct atmel_mci *host, 4657d2be074SHaavard Skinnemoen unsigned int ns) 4667d2be074SHaavard Skinnemoen { 4677d2be074SHaavard Skinnemoen return (ns * (host->bus_hz / 1000000) + 999) / 1000; 4687d2be074SHaavard Skinnemoen } 4697d2be074SHaavard Skinnemoen 4707d2be074SHaavard Skinnemoen static void atmci_set_timeout(struct atmel_mci *host, 471965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot, struct mmc_data *data) 4727d2be074SHaavard Skinnemoen { 4737d2be074SHaavard Skinnemoen static unsigned dtomul_to_shift[] = { 4747d2be074SHaavard Skinnemoen 0, 4, 7, 8, 10, 12, 16, 20 4757d2be074SHaavard Skinnemoen }; 4767d2be074SHaavard Skinnemoen unsigned timeout; 4777d2be074SHaavard Skinnemoen unsigned dtocyc; 4787d2be074SHaavard Skinnemoen unsigned dtomul; 4797d2be074SHaavard Skinnemoen 4807d2be074SHaavard Skinnemoen timeout = ns_to_clocks(host, data->timeout_ns) + data->timeout_clks; 4817d2be074SHaavard Skinnemoen 4827d2be074SHaavard Skinnemoen for (dtomul = 0; dtomul < 8; dtomul++) { 4837d2be074SHaavard Skinnemoen unsigned shift = dtomul_to_shift[dtomul]; 4847d2be074SHaavard Skinnemoen dtocyc = (timeout + (1 << shift) - 1) >> shift; 4857d2be074SHaavard Skinnemoen if (dtocyc < 15) 4867d2be074SHaavard Skinnemoen break; 4877d2be074SHaavard Skinnemoen } 4887d2be074SHaavard Skinnemoen 4897d2be074SHaavard Skinnemoen if (dtomul >= 8) { 4907d2be074SHaavard Skinnemoen dtomul = 7; 4917d2be074SHaavard Skinnemoen dtocyc = 15; 4927d2be074SHaavard Skinnemoen } 4937d2be074SHaavard Skinnemoen 494965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "setting timeout to %u cycles\n", 4957d2be074SHaavard Skinnemoen dtocyc << dtomul_to_shift[dtomul]); 4967d2be074SHaavard Skinnemoen mci_writel(host, DTOR, (MCI_DTOMUL(dtomul) | MCI_DTOCYC(dtocyc))); 4977d2be074SHaavard Skinnemoen } 4987d2be074SHaavard Skinnemoen 4997d2be074SHaavard Skinnemoen /* 5007d2be074SHaavard Skinnemoen * Return mask with command flags to be enabled for this command. 5017d2be074SHaavard Skinnemoen */ 5027d2be074SHaavard Skinnemoen static u32 atmci_prepare_command(struct mmc_host *mmc, 5037d2be074SHaavard Skinnemoen struct mmc_command *cmd) 5047d2be074SHaavard Skinnemoen { 5057d2be074SHaavard Skinnemoen struct mmc_data *data; 5067d2be074SHaavard Skinnemoen u32 cmdr; 5077d2be074SHaavard Skinnemoen 5087d2be074SHaavard Skinnemoen cmd->error = -EINPROGRESS; 5097d2be074SHaavard Skinnemoen 5107d2be074SHaavard Skinnemoen cmdr = MCI_CMDR_CMDNB(cmd->opcode); 5117d2be074SHaavard Skinnemoen 5127d2be074SHaavard Skinnemoen if (cmd->flags & MMC_RSP_PRESENT) { 5137d2be074SHaavard Skinnemoen if (cmd->flags & MMC_RSP_136) 5147d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_RSPTYP_136BIT; 5157d2be074SHaavard Skinnemoen else 5167d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_RSPTYP_48BIT; 5177d2be074SHaavard Skinnemoen } 5187d2be074SHaavard Skinnemoen 5197d2be074SHaavard Skinnemoen /* 5207d2be074SHaavard Skinnemoen * This should really be MAXLAT_5 for CMD2 and ACMD41, but 5217d2be074SHaavard Skinnemoen * it's too difficult to determine whether this is an ACMD or 5227d2be074SHaavard Skinnemoen * not. Better make it 64. 5237d2be074SHaavard Skinnemoen */ 5247d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_MAXLAT_64CYC; 5257d2be074SHaavard Skinnemoen 5267d2be074SHaavard Skinnemoen if (mmc->ios.bus_mode == MMC_BUSMODE_OPENDRAIN) 5277d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_OPDCMD; 5287d2be074SHaavard Skinnemoen 5297d2be074SHaavard Skinnemoen data = cmd->data; 5307d2be074SHaavard Skinnemoen if (data) { 5317d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_START_XFER; 5327d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_STREAM) 5337d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_STREAM; 5347d2be074SHaavard Skinnemoen else if (data->blocks > 1) 5357d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_MULTI_BLOCK; 5367d2be074SHaavard Skinnemoen else 5377d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_BLOCK; 5387d2be074SHaavard Skinnemoen 5397d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 5407d2be074SHaavard Skinnemoen cmdr |= MCI_CMDR_TRDIR_READ; 5417d2be074SHaavard Skinnemoen } 5427d2be074SHaavard Skinnemoen 5437d2be074SHaavard Skinnemoen return cmdr; 5447d2be074SHaavard Skinnemoen } 5457d2be074SHaavard Skinnemoen 5467d2be074SHaavard Skinnemoen static void atmci_start_command(struct atmel_mci *host, 547965ebf33SHaavard Skinnemoen struct mmc_command *cmd, u32 cmd_flags) 5487d2be074SHaavard Skinnemoen { 5497d2be074SHaavard Skinnemoen WARN_ON(host->cmd); 5507d2be074SHaavard Skinnemoen host->cmd = cmd; 5517d2be074SHaavard Skinnemoen 552965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, 5537d2be074SHaavard Skinnemoen "start command: ARGR=0x%08x CMDR=0x%08x\n", 5547d2be074SHaavard Skinnemoen cmd->arg, cmd_flags); 5557d2be074SHaavard Skinnemoen 5567d2be074SHaavard Skinnemoen mci_writel(host, ARGR, cmd->arg); 5577d2be074SHaavard Skinnemoen mci_writel(host, CMDR, cmd_flags); 5587d2be074SHaavard Skinnemoen } 5597d2be074SHaavard Skinnemoen 560965ebf33SHaavard Skinnemoen static void send_stop_cmd(struct atmel_mci *host, struct mmc_data *data) 5617d2be074SHaavard Skinnemoen { 5627d2be074SHaavard Skinnemoen atmci_start_command(host, data->stop, host->stop_cmdr); 5637d2be074SHaavard Skinnemoen mci_writel(host, IER, MCI_CMDRDY); 5647d2be074SHaavard Skinnemoen } 5657d2be074SHaavard Skinnemoen 56665e8b083SHaavard Skinnemoen #ifdef CONFIG_MMC_ATMELMCI_DMA 56765e8b083SHaavard Skinnemoen static void atmci_dma_cleanup(struct atmel_mci *host) 56865e8b083SHaavard Skinnemoen { 56965e8b083SHaavard Skinnemoen struct mmc_data *data = host->data; 57065e8b083SHaavard Skinnemoen 57165e8b083SHaavard Skinnemoen dma_unmap_sg(&host->pdev->dev, data->sg, data->sg_len, 57265e8b083SHaavard Skinnemoen ((data->flags & MMC_DATA_WRITE) 57365e8b083SHaavard Skinnemoen ? DMA_TO_DEVICE : DMA_FROM_DEVICE)); 57465e8b083SHaavard Skinnemoen } 57565e8b083SHaavard Skinnemoen 57665e8b083SHaavard Skinnemoen static void atmci_stop_dma(struct atmel_mci *host) 57765e8b083SHaavard Skinnemoen { 57865e8b083SHaavard Skinnemoen struct dma_chan *chan = host->data_chan; 57965e8b083SHaavard Skinnemoen 58065e8b083SHaavard Skinnemoen if (chan) { 58165e8b083SHaavard Skinnemoen chan->device->device_terminate_all(chan); 58265e8b083SHaavard Skinnemoen atmci_dma_cleanup(host); 58365e8b083SHaavard Skinnemoen } else { 58465e8b083SHaavard Skinnemoen /* Data transfer was stopped by the interrupt handler */ 58565e8b083SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 58665e8b083SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 58765e8b083SHaavard Skinnemoen } 58865e8b083SHaavard Skinnemoen } 58965e8b083SHaavard Skinnemoen 59065e8b083SHaavard Skinnemoen /* This function is called by the DMA driver from tasklet context. */ 59165e8b083SHaavard Skinnemoen static void atmci_dma_complete(void *arg) 59265e8b083SHaavard Skinnemoen { 59365e8b083SHaavard Skinnemoen struct atmel_mci *host = arg; 59465e8b083SHaavard Skinnemoen struct mmc_data *data = host->data; 59565e8b083SHaavard Skinnemoen 59665e8b083SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "DMA complete\n"); 59765e8b083SHaavard Skinnemoen 59874791a2dSNicolas Ferre if (atmci_is_mci2()) 59974791a2dSNicolas Ferre /* Disable DMA hardware handshaking on MCI */ 60074791a2dSNicolas Ferre mci_writel(host, DMA, mci_readl(host, DMA) & ~MCI_DMAEN); 60174791a2dSNicolas Ferre 60265e8b083SHaavard Skinnemoen atmci_dma_cleanup(host); 60365e8b083SHaavard Skinnemoen 60465e8b083SHaavard Skinnemoen /* 60565e8b083SHaavard Skinnemoen * If the card was removed, data will be NULL. No point trying 60665e8b083SHaavard Skinnemoen * to send the stop command or waiting for NBUSY in this case. 60765e8b083SHaavard Skinnemoen */ 60865e8b083SHaavard Skinnemoen if (data) { 60965e8b083SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 61065e8b083SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 61165e8b083SHaavard Skinnemoen 61265e8b083SHaavard Skinnemoen /* 61365e8b083SHaavard Skinnemoen * Regardless of what the documentation says, we have 61465e8b083SHaavard Skinnemoen * to wait for NOTBUSY even after block read 61565e8b083SHaavard Skinnemoen * operations. 61665e8b083SHaavard Skinnemoen * 61765e8b083SHaavard Skinnemoen * When the DMA transfer is complete, the controller 61865e8b083SHaavard Skinnemoen * may still be reading the CRC from the card, i.e. 61965e8b083SHaavard Skinnemoen * the data transfer is still in progress and we 62065e8b083SHaavard Skinnemoen * haven't seen all the potential error bits yet. 62165e8b083SHaavard Skinnemoen * 62265e8b083SHaavard Skinnemoen * The interrupt handler will schedule a different 62365e8b083SHaavard Skinnemoen * tasklet to finish things up when the data transfer 62465e8b083SHaavard Skinnemoen * is completely done. 62565e8b083SHaavard Skinnemoen * 62665e8b083SHaavard Skinnemoen * We may not complete the mmc request here anyway 62765e8b083SHaavard Skinnemoen * because the mmc layer may call back and cause us to 62865e8b083SHaavard Skinnemoen * violate the "don't submit new operations from the 62965e8b083SHaavard Skinnemoen * completion callback" rule of the dma engine 63065e8b083SHaavard Skinnemoen * framework. 63165e8b083SHaavard Skinnemoen */ 63265e8b083SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 63365e8b083SHaavard Skinnemoen } 63465e8b083SHaavard Skinnemoen } 63565e8b083SHaavard Skinnemoen 63665e8b083SHaavard Skinnemoen static int 63774791a2dSNicolas Ferre atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data) 63865e8b083SHaavard Skinnemoen { 63965e8b083SHaavard Skinnemoen struct dma_chan *chan; 64065e8b083SHaavard Skinnemoen struct dma_async_tx_descriptor *desc; 64165e8b083SHaavard Skinnemoen struct scatterlist *sg; 64265e8b083SHaavard Skinnemoen unsigned int i; 64365e8b083SHaavard Skinnemoen enum dma_data_direction direction; 644657a77faSAtsushi Nemoto unsigned int sglen; 64565e8b083SHaavard Skinnemoen 64665e8b083SHaavard Skinnemoen /* 64765e8b083SHaavard Skinnemoen * We don't do DMA on "complex" transfers, i.e. with 64865e8b083SHaavard Skinnemoen * non-word-aligned buffers or lengths. Also, we don't bother 64965e8b083SHaavard Skinnemoen * with all the DMA setup overhead for short transfers. 65065e8b083SHaavard Skinnemoen */ 65165e8b083SHaavard Skinnemoen if (data->blocks * data->blksz < ATMCI_DMA_THRESHOLD) 65265e8b083SHaavard Skinnemoen return -EINVAL; 65365e8b083SHaavard Skinnemoen if (data->blksz & 3) 65465e8b083SHaavard Skinnemoen return -EINVAL; 65565e8b083SHaavard Skinnemoen 65665e8b083SHaavard Skinnemoen for_each_sg(data->sg, sg, data->sg_len, i) { 65765e8b083SHaavard Skinnemoen if (sg->offset & 3 || sg->length & 3) 65865e8b083SHaavard Skinnemoen return -EINVAL; 65965e8b083SHaavard Skinnemoen } 66065e8b083SHaavard Skinnemoen 66165e8b083SHaavard Skinnemoen /* If we don't have a channel, we can't do DMA */ 66265e8b083SHaavard Skinnemoen chan = host->dma.chan; 6636f49a57aSDan Williams if (chan) 66465e8b083SHaavard Skinnemoen host->data_chan = chan; 66565e8b083SHaavard Skinnemoen 66665e8b083SHaavard Skinnemoen if (!chan) 66765e8b083SHaavard Skinnemoen return -ENODEV; 66865e8b083SHaavard Skinnemoen 66974791a2dSNicolas Ferre if (atmci_is_mci2()) 67074791a2dSNicolas Ferre mci_writel(host, DMA, MCI_DMA_CHKSIZE(3) | MCI_DMAEN); 67174791a2dSNicolas Ferre 67265e8b083SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 67365e8b083SHaavard Skinnemoen direction = DMA_FROM_DEVICE; 67465e8b083SHaavard Skinnemoen else 67565e8b083SHaavard Skinnemoen direction = DMA_TO_DEVICE; 67665e8b083SHaavard Skinnemoen 677657a77faSAtsushi Nemoto sglen = dma_map_sg(&host->pdev->dev, data->sg, data->sg_len, direction); 678657a77faSAtsushi Nemoto if (sglen != data->sg_len) 679657a77faSAtsushi Nemoto goto unmap_exit; 68065e8b083SHaavard Skinnemoen desc = chan->device->device_prep_slave_sg(chan, 68165e8b083SHaavard Skinnemoen data->sg, data->sg_len, direction, 68265e8b083SHaavard Skinnemoen DMA_PREP_INTERRUPT | DMA_CTRL_ACK); 68365e8b083SHaavard Skinnemoen if (!desc) 684657a77faSAtsushi Nemoto goto unmap_exit; 68565e8b083SHaavard Skinnemoen 68665e8b083SHaavard Skinnemoen host->dma.data_desc = desc; 68765e8b083SHaavard Skinnemoen desc->callback = atmci_dma_complete; 68865e8b083SHaavard Skinnemoen desc->callback_param = host; 68965e8b083SHaavard Skinnemoen 69065e8b083SHaavard Skinnemoen return 0; 691657a77faSAtsushi Nemoto unmap_exit: 692657a77faSAtsushi Nemoto dma_unmap_sg(&host->pdev->dev, data->sg, sglen, direction); 693657a77faSAtsushi Nemoto return -ENOMEM; 69465e8b083SHaavard Skinnemoen } 69565e8b083SHaavard Skinnemoen 69674791a2dSNicolas Ferre static void atmci_submit_data(struct atmel_mci *host) 69774791a2dSNicolas Ferre { 69874791a2dSNicolas Ferre struct dma_chan *chan = host->data_chan; 69974791a2dSNicolas Ferre struct dma_async_tx_descriptor *desc = host->dma.data_desc; 70074791a2dSNicolas Ferre 70174791a2dSNicolas Ferre if (chan) { 70274791a2dSNicolas Ferre desc->tx_submit(desc); 70374791a2dSNicolas Ferre chan->device->device_issue_pending(chan); 70474791a2dSNicolas Ferre } 70574791a2dSNicolas Ferre } 70674791a2dSNicolas Ferre 70765e8b083SHaavard Skinnemoen #else /* CONFIG_MMC_ATMELMCI_DMA */ 70865e8b083SHaavard Skinnemoen 70974791a2dSNicolas Ferre static int atmci_prepare_data_dma(struct atmel_mci *host, struct mmc_data *data) 71065e8b083SHaavard Skinnemoen { 71165e8b083SHaavard Skinnemoen return -ENOSYS; 71265e8b083SHaavard Skinnemoen } 71365e8b083SHaavard Skinnemoen 71474791a2dSNicolas Ferre static void atmci_submit_data(struct atmel_mci *host) {} 71574791a2dSNicolas Ferre 71665e8b083SHaavard Skinnemoen static void atmci_stop_dma(struct atmel_mci *host) 71765e8b083SHaavard Skinnemoen { 71865e8b083SHaavard Skinnemoen /* Data transfer was stopped by the interrupt handler */ 71965e8b083SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 72065e8b083SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 72165e8b083SHaavard Skinnemoen } 72265e8b083SHaavard Skinnemoen 72365e8b083SHaavard Skinnemoen #endif /* CONFIG_MMC_ATMELMCI_DMA */ 72465e8b083SHaavard Skinnemoen 7257d2be074SHaavard Skinnemoen /* 7267d2be074SHaavard Skinnemoen * Returns a mask of interrupt flags to be enabled after the whole 7277d2be074SHaavard Skinnemoen * request has been prepared. 7287d2be074SHaavard Skinnemoen */ 72974791a2dSNicolas Ferre static u32 atmci_prepare_data(struct atmel_mci *host, struct mmc_data *data) 7307d2be074SHaavard Skinnemoen { 7317d2be074SHaavard Skinnemoen u32 iflags; 7327d2be074SHaavard Skinnemoen 7337d2be074SHaavard Skinnemoen data->error = -EINPROGRESS; 7347d2be074SHaavard Skinnemoen 7357d2be074SHaavard Skinnemoen WARN_ON(host->data); 7367d2be074SHaavard Skinnemoen host->sg = NULL; 7377d2be074SHaavard Skinnemoen host->data = data; 7387d2be074SHaavard Skinnemoen 7397d2be074SHaavard Skinnemoen iflags = ATMCI_DATA_ERROR_FLAGS; 74074791a2dSNicolas Ferre if (atmci_prepare_data_dma(host, data)) { 74165e8b083SHaavard Skinnemoen host->data_chan = NULL; 742965ebf33SHaavard Skinnemoen 743965ebf33SHaavard Skinnemoen /* 744965ebf33SHaavard Skinnemoen * Errata: MMC data write operation with less than 12 745965ebf33SHaavard Skinnemoen * bytes is impossible. 746965ebf33SHaavard Skinnemoen * 747965ebf33SHaavard Skinnemoen * Errata: MCI Transmit Data Register (TDR) FIFO 748965ebf33SHaavard Skinnemoen * corruption when length is not multiple of 4. 749965ebf33SHaavard Skinnemoen */ 750965ebf33SHaavard Skinnemoen if (data->blocks * data->blksz < 12 751965ebf33SHaavard Skinnemoen || (data->blocks * data->blksz) & 3) 752965ebf33SHaavard Skinnemoen host->need_reset = true; 753965ebf33SHaavard Skinnemoen 7547d2be074SHaavard Skinnemoen host->sg = data->sg; 7557d2be074SHaavard Skinnemoen host->pio_offset = 0; 7567d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_READ) 7577d2be074SHaavard Skinnemoen iflags |= MCI_RXRDY; 7587d2be074SHaavard Skinnemoen else 7597d2be074SHaavard Skinnemoen iflags |= MCI_TXRDY; 76065e8b083SHaavard Skinnemoen } 7617d2be074SHaavard Skinnemoen 7627d2be074SHaavard Skinnemoen return iflags; 7637d2be074SHaavard Skinnemoen } 7647d2be074SHaavard Skinnemoen 765965ebf33SHaavard Skinnemoen static void atmci_start_request(struct atmel_mci *host, 766965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot) 7677d2be074SHaavard Skinnemoen { 768965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 7697d2be074SHaavard Skinnemoen struct mmc_command *cmd; 770965ebf33SHaavard Skinnemoen struct mmc_data *data; 7717d2be074SHaavard Skinnemoen u32 iflags; 772965ebf33SHaavard Skinnemoen u32 cmdflags; 773965ebf33SHaavard Skinnemoen 774965ebf33SHaavard Skinnemoen mrq = slot->mrq; 775965ebf33SHaavard Skinnemoen host->cur_slot = slot; 776965ebf33SHaavard Skinnemoen host->mrq = mrq; 777965ebf33SHaavard Skinnemoen 778965ebf33SHaavard Skinnemoen host->pending_events = 0; 779965ebf33SHaavard Skinnemoen host->completed_events = 0; 780ca55f46eSHaavard Skinnemoen host->data_status = 0; 781965ebf33SHaavard Skinnemoen 782965ebf33SHaavard Skinnemoen if (host->need_reset) { 783965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 784965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIEN); 785965ebf33SHaavard Skinnemoen mci_writel(host, MR, host->mode_reg); 78674791a2dSNicolas Ferre if (atmci_is_mci2()) 78774791a2dSNicolas Ferre mci_writel(host, CFG, host->cfg_reg); 788965ebf33SHaavard Skinnemoen host->need_reset = false; 789965ebf33SHaavard Skinnemoen } 790965ebf33SHaavard Skinnemoen mci_writel(host, SDCR, slot->sdc_reg); 7917d2be074SHaavard Skinnemoen 7927d2be074SHaavard Skinnemoen iflags = mci_readl(host, IMR); 7937d2be074SHaavard Skinnemoen if (iflags) 794965ebf33SHaavard Skinnemoen dev_warn(&slot->mmc->class_dev, "WARNING: IMR=0x%08x\n", 795965ebf33SHaavard Skinnemoen iflags); 7967d2be074SHaavard Skinnemoen 797965ebf33SHaavard Skinnemoen if (unlikely(test_and_clear_bit(ATMCI_CARD_NEED_INIT, &slot->flags))) { 798965ebf33SHaavard Skinnemoen /* Send init sequence (74 clock cycles) */ 799965ebf33SHaavard Skinnemoen mci_writel(host, CMDR, MCI_CMDR_SPCMD_INIT); 800965ebf33SHaavard Skinnemoen while (!(mci_readl(host, SR) & MCI_CMDRDY)) 801965ebf33SHaavard Skinnemoen cpu_relax(); 8027d2be074SHaavard Skinnemoen } 80374791a2dSNicolas Ferre iflags = 0; 8047d2be074SHaavard Skinnemoen data = mrq->data; 8057d2be074SHaavard Skinnemoen if (data) { 806965ebf33SHaavard Skinnemoen atmci_set_timeout(host, slot, data); 807a252e3e3SHaavard Skinnemoen 808a252e3e3SHaavard Skinnemoen /* Must set block count/size before sending command */ 809a252e3e3SHaavard Skinnemoen mci_writel(host, BLKR, MCI_BCNT(data->blocks) 810a252e3e3SHaavard Skinnemoen | MCI_BLKLEN(data->blksz)); 811965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "BLKR=0x%08x\n", 812965ebf33SHaavard Skinnemoen MCI_BCNT(data->blocks) | MCI_BLKLEN(data->blksz)); 81374791a2dSNicolas Ferre 81474791a2dSNicolas Ferre iflags |= atmci_prepare_data(host, data); 8157d2be074SHaavard Skinnemoen } 8167d2be074SHaavard Skinnemoen 81774791a2dSNicolas Ferre iflags |= MCI_CMDRDY; 8187d2be074SHaavard Skinnemoen cmd = mrq->cmd; 819965ebf33SHaavard Skinnemoen cmdflags = atmci_prepare_command(slot->mmc, cmd); 8207d2be074SHaavard Skinnemoen atmci_start_command(host, cmd, cmdflags); 8217d2be074SHaavard Skinnemoen 8227d2be074SHaavard Skinnemoen if (data) 82374791a2dSNicolas Ferre atmci_submit_data(host); 8247d2be074SHaavard Skinnemoen 8257d2be074SHaavard Skinnemoen if (mrq->stop) { 826965ebf33SHaavard Skinnemoen host->stop_cmdr = atmci_prepare_command(slot->mmc, mrq->stop); 8277d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_STOP_XFER; 8287d2be074SHaavard Skinnemoen if (!(data->flags & MMC_DATA_WRITE)) 8297d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_TRDIR_READ; 8307d2be074SHaavard Skinnemoen if (data->flags & MMC_DATA_STREAM) 8317d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_STREAM; 8327d2be074SHaavard Skinnemoen else 8337d2be074SHaavard Skinnemoen host->stop_cmdr |= MCI_CMDR_MULTI_BLOCK; 8347d2be074SHaavard Skinnemoen } 8357d2be074SHaavard Skinnemoen 8367d2be074SHaavard Skinnemoen /* 8377d2be074SHaavard Skinnemoen * We could have enabled interrupts earlier, but I suspect 8387d2be074SHaavard Skinnemoen * that would open up a nice can of interesting race 8397d2be074SHaavard Skinnemoen * conditions (e.g. command and data complete, but stop not 8407d2be074SHaavard Skinnemoen * prepared yet.) 8417d2be074SHaavard Skinnemoen */ 8427d2be074SHaavard Skinnemoen mci_writel(host, IER, iflags); 843965ebf33SHaavard Skinnemoen } 8447d2be074SHaavard Skinnemoen 845965ebf33SHaavard Skinnemoen static void atmci_queue_request(struct atmel_mci *host, 846965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot, struct mmc_request *mrq) 847965ebf33SHaavard Skinnemoen { 848965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "queue request: state=%d\n", 849965ebf33SHaavard Skinnemoen host->state); 850965ebf33SHaavard Skinnemoen 851965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 852965ebf33SHaavard Skinnemoen slot->mrq = mrq; 853965ebf33SHaavard Skinnemoen if (host->state == STATE_IDLE) { 854965ebf33SHaavard Skinnemoen host->state = STATE_SENDING_CMD; 855965ebf33SHaavard Skinnemoen atmci_start_request(host, slot); 856965ebf33SHaavard Skinnemoen } else { 857965ebf33SHaavard Skinnemoen list_add_tail(&slot->queue_node, &host->queue); 858965ebf33SHaavard Skinnemoen } 859965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 860965ebf33SHaavard Skinnemoen } 861965ebf33SHaavard Skinnemoen 862965ebf33SHaavard Skinnemoen static void atmci_request(struct mmc_host *mmc, struct mmc_request *mrq) 863965ebf33SHaavard Skinnemoen { 864965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 865965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 866965ebf33SHaavard Skinnemoen struct mmc_data *data; 867965ebf33SHaavard Skinnemoen 868965ebf33SHaavard Skinnemoen WARN_ON(slot->mrq); 869965ebf33SHaavard Skinnemoen 870965ebf33SHaavard Skinnemoen /* 871965ebf33SHaavard Skinnemoen * We may "know" the card is gone even though there's still an 872965ebf33SHaavard Skinnemoen * electrical connection. If so, we really need to communicate 873965ebf33SHaavard Skinnemoen * this to the MMC core since there won't be any more 874965ebf33SHaavard Skinnemoen * interrupts as the card is completely removed. Otherwise, 875965ebf33SHaavard Skinnemoen * the MMC core might believe the card is still there even 876965ebf33SHaavard Skinnemoen * though the card was just removed very slowly. 877965ebf33SHaavard Skinnemoen */ 878965ebf33SHaavard Skinnemoen if (!test_bit(ATMCI_CARD_PRESENT, &slot->flags)) { 879965ebf33SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 880965ebf33SHaavard Skinnemoen mmc_request_done(mmc, mrq); 8817d2be074SHaavard Skinnemoen return; 882965ebf33SHaavard Skinnemoen } 8837d2be074SHaavard Skinnemoen 884965ebf33SHaavard Skinnemoen /* We don't support multiple blocks of weird lengths. */ 885965ebf33SHaavard Skinnemoen data = mrq->data; 886965ebf33SHaavard Skinnemoen if (data && data->blocks > 1 && data->blksz & 3) { 8877d2be074SHaavard Skinnemoen mrq->cmd->error = -EINVAL; 8887d2be074SHaavard Skinnemoen mmc_request_done(mmc, mrq); 8897d2be074SHaavard Skinnemoen } 8907d2be074SHaavard Skinnemoen 891965ebf33SHaavard Skinnemoen atmci_queue_request(host, slot, mrq); 892965ebf33SHaavard Skinnemoen } 893965ebf33SHaavard Skinnemoen 8947d2be074SHaavard Skinnemoen static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 8957d2be074SHaavard Skinnemoen { 896965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 897965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 898965ebf33SHaavard Skinnemoen unsigned int i; 8997d2be074SHaavard Skinnemoen 900965ebf33SHaavard Skinnemoen slot->sdc_reg &= ~MCI_SDCBUS_MASK; 901945533b5SHaavard Skinnemoen switch (ios->bus_width) { 902945533b5SHaavard Skinnemoen case MMC_BUS_WIDTH_1: 903965ebf33SHaavard Skinnemoen slot->sdc_reg |= MCI_SDCBUS_1BIT; 904945533b5SHaavard Skinnemoen break; 905945533b5SHaavard Skinnemoen case MMC_BUS_WIDTH_4: 90632ab83a5SHans-Christian Egtvedt slot->sdc_reg |= MCI_SDCBUS_4BIT; 907945533b5SHaavard Skinnemoen break; 908945533b5SHaavard Skinnemoen } 909945533b5SHaavard Skinnemoen 9107d2be074SHaavard Skinnemoen if (ios->clock) { 911965ebf33SHaavard Skinnemoen unsigned int clock_min = ~0U; 9127d2be074SHaavard Skinnemoen u32 clkdiv; 9137d2be074SHaavard Skinnemoen 914965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 915965ebf33SHaavard Skinnemoen if (!host->mode_reg) { 916945533b5SHaavard Skinnemoen clk_enable(host->mck); 917965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 918965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIEN); 91974791a2dSNicolas Ferre if (atmci_is_mci2()) 92074791a2dSNicolas Ferre mci_writel(host, CFG, host->cfg_reg); 921965ebf33SHaavard Skinnemoen } 922945533b5SHaavard Skinnemoen 923965ebf33SHaavard Skinnemoen /* 924965ebf33SHaavard Skinnemoen * Use mirror of ios->clock to prevent race with mmc 925965ebf33SHaavard Skinnemoen * core ios update when finding the minimum. 926965ebf33SHaavard Skinnemoen */ 927965ebf33SHaavard Skinnemoen slot->clock = ios->clock; 928965ebf33SHaavard Skinnemoen for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) { 929965ebf33SHaavard Skinnemoen if (host->slot[i] && host->slot[i]->clock 930965ebf33SHaavard Skinnemoen && host->slot[i]->clock < clock_min) 931965ebf33SHaavard Skinnemoen clock_min = host->slot[i]->clock; 932965ebf33SHaavard Skinnemoen } 933965ebf33SHaavard Skinnemoen 934965ebf33SHaavard Skinnemoen /* Calculate clock divider */ 935965ebf33SHaavard Skinnemoen clkdiv = DIV_ROUND_UP(host->bus_hz, 2 * clock_min) - 1; 9367d2be074SHaavard Skinnemoen if (clkdiv > 255) { 9377d2be074SHaavard Skinnemoen dev_warn(&mmc->class_dev, 9387d2be074SHaavard Skinnemoen "clock %u too slow; using %lu\n", 939965ebf33SHaavard Skinnemoen clock_min, host->bus_hz / (2 * 256)); 9407d2be074SHaavard Skinnemoen clkdiv = 255; 9417d2be074SHaavard Skinnemoen } 9427d2be074SHaavard Skinnemoen 94304d699c3SRob Emanuele host->mode_reg = MCI_MR_CLKDIV(clkdiv); 94404d699c3SRob Emanuele 945965ebf33SHaavard Skinnemoen /* 946965ebf33SHaavard Skinnemoen * WRPROOF and RDPROOF prevent overruns/underruns by 947965ebf33SHaavard Skinnemoen * stopping the clock when the FIFO is full/empty. 948965ebf33SHaavard Skinnemoen * This state is not expected to last for long. 949965ebf33SHaavard Skinnemoen */ 95004d699c3SRob Emanuele if (mci_has_rwproof()) 95104d699c3SRob Emanuele host->mode_reg |= (MCI_MR_WRPROOF | MCI_MR_RDPROOF); 9527d2be074SHaavard Skinnemoen 953965ebf33SHaavard Skinnemoen if (list_empty(&host->queue)) 954945533b5SHaavard Skinnemoen mci_writel(host, MR, host->mode_reg); 955965ebf33SHaavard Skinnemoen else 956965ebf33SHaavard Skinnemoen host->need_clock_update = true; 957965ebf33SHaavard Skinnemoen 958965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 959945533b5SHaavard Skinnemoen } else { 960965ebf33SHaavard Skinnemoen bool any_slot_active = false; 961965ebf33SHaavard Skinnemoen 962965ebf33SHaavard Skinnemoen spin_lock_bh(&host->lock); 963965ebf33SHaavard Skinnemoen slot->clock = 0; 964965ebf33SHaavard Skinnemoen for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) { 965965ebf33SHaavard Skinnemoen if (host->slot[i] && host->slot[i]->clock) { 966965ebf33SHaavard Skinnemoen any_slot_active = true; 967965ebf33SHaavard Skinnemoen break; 968965ebf33SHaavard Skinnemoen } 969965ebf33SHaavard Skinnemoen } 970965ebf33SHaavard Skinnemoen if (!any_slot_active) { 971945533b5SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIDIS); 972945533b5SHaavard Skinnemoen if (host->mode_reg) { 973945533b5SHaavard Skinnemoen mci_readl(host, MR); 974945533b5SHaavard Skinnemoen clk_disable(host->mck); 975945533b5SHaavard Skinnemoen } 976945533b5SHaavard Skinnemoen host->mode_reg = 0; 9777d2be074SHaavard Skinnemoen } 978965ebf33SHaavard Skinnemoen spin_unlock_bh(&host->lock); 979965ebf33SHaavard Skinnemoen } 9807d2be074SHaavard Skinnemoen 9817d2be074SHaavard Skinnemoen switch (ios->power_mode) { 982965ebf33SHaavard Skinnemoen case MMC_POWER_UP: 983965ebf33SHaavard Skinnemoen set_bit(ATMCI_CARD_NEED_INIT, &slot->flags); 984965ebf33SHaavard Skinnemoen break; 9857d2be074SHaavard Skinnemoen default: 9867d2be074SHaavard Skinnemoen /* 9877d2be074SHaavard Skinnemoen * TODO: None of the currently available AVR32-based 9887d2be074SHaavard Skinnemoen * boards allow MMC power to be turned off. Implement 9897d2be074SHaavard Skinnemoen * power control when this can be tested properly. 990965ebf33SHaavard Skinnemoen * 991965ebf33SHaavard Skinnemoen * We also need to hook this into the clock management 992965ebf33SHaavard Skinnemoen * somehow so that newly inserted cards aren't 993965ebf33SHaavard Skinnemoen * subjected to a fast clock before we have a chance 994965ebf33SHaavard Skinnemoen * to figure out what the maximum rate is. Currently, 995965ebf33SHaavard Skinnemoen * there's no way to avoid this, and there never will 996965ebf33SHaavard Skinnemoen * be for boards that don't support power control. 9977d2be074SHaavard Skinnemoen */ 9987d2be074SHaavard Skinnemoen break; 9997d2be074SHaavard Skinnemoen } 10007d2be074SHaavard Skinnemoen } 10017d2be074SHaavard Skinnemoen 10027d2be074SHaavard Skinnemoen static int atmci_get_ro(struct mmc_host *mmc) 10037d2be074SHaavard Skinnemoen { 1004965ebf33SHaavard Skinnemoen int read_only = -ENOSYS; 1005965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 10067d2be074SHaavard Skinnemoen 1007965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->wp_pin)) { 1008965ebf33SHaavard Skinnemoen read_only = gpio_get_value(slot->wp_pin); 10097d2be074SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "card is %s\n", 10107d2be074SHaavard Skinnemoen read_only ? "read-only" : "read-write"); 10117d2be074SHaavard Skinnemoen } 10127d2be074SHaavard Skinnemoen 10137d2be074SHaavard Skinnemoen return read_only; 10147d2be074SHaavard Skinnemoen } 10157d2be074SHaavard Skinnemoen 1016965ebf33SHaavard Skinnemoen static int atmci_get_cd(struct mmc_host *mmc) 1017965ebf33SHaavard Skinnemoen { 1018965ebf33SHaavard Skinnemoen int present = -ENOSYS; 1019965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = mmc_priv(mmc); 1020965ebf33SHaavard Skinnemoen 1021965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 10221c1452beSJonas Larsson present = !(gpio_get_value(slot->detect_pin) ^ 10231c1452beSJonas Larsson slot->detect_is_active_high); 1024965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "card is %spresent\n", 1025965ebf33SHaavard Skinnemoen present ? "" : "not "); 1026965ebf33SHaavard Skinnemoen } 1027965ebf33SHaavard Skinnemoen 1028965ebf33SHaavard Skinnemoen return present; 1029965ebf33SHaavard Skinnemoen } 1030965ebf33SHaavard Skinnemoen 1031965ebf33SHaavard Skinnemoen static const struct mmc_host_ops atmci_ops = { 10327d2be074SHaavard Skinnemoen .request = atmci_request, 10337d2be074SHaavard Skinnemoen .set_ios = atmci_set_ios, 10347d2be074SHaavard Skinnemoen .get_ro = atmci_get_ro, 1035965ebf33SHaavard Skinnemoen .get_cd = atmci_get_cd, 10367d2be074SHaavard Skinnemoen }; 10377d2be074SHaavard Skinnemoen 1038965ebf33SHaavard Skinnemoen /* Called with host->lock held */ 1039965ebf33SHaavard Skinnemoen static void atmci_request_end(struct atmel_mci *host, struct mmc_request *mrq) 1040965ebf33SHaavard Skinnemoen __releases(&host->lock) 1041965ebf33SHaavard Skinnemoen __acquires(&host->lock) 1042965ebf33SHaavard Skinnemoen { 1043965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = NULL; 1044965ebf33SHaavard Skinnemoen struct mmc_host *prev_mmc = host->cur_slot->mmc; 1045965ebf33SHaavard Skinnemoen 1046965ebf33SHaavard Skinnemoen WARN_ON(host->cmd || host->data); 1047965ebf33SHaavard Skinnemoen 1048965ebf33SHaavard Skinnemoen /* 1049965ebf33SHaavard Skinnemoen * Update the MMC clock rate if necessary. This may be 1050965ebf33SHaavard Skinnemoen * necessary if set_ios() is called when a different slot is 1051965ebf33SHaavard Skinnemoen * busy transfering data. 1052965ebf33SHaavard Skinnemoen */ 1053965ebf33SHaavard Skinnemoen if (host->need_clock_update) 1054965ebf33SHaavard Skinnemoen mci_writel(host, MR, host->mode_reg); 1055965ebf33SHaavard Skinnemoen 1056965ebf33SHaavard Skinnemoen host->cur_slot->mrq = NULL; 1057965ebf33SHaavard Skinnemoen host->mrq = NULL; 1058965ebf33SHaavard Skinnemoen if (!list_empty(&host->queue)) { 1059965ebf33SHaavard Skinnemoen slot = list_entry(host->queue.next, 1060965ebf33SHaavard Skinnemoen struct atmel_mci_slot, queue_node); 1061965ebf33SHaavard Skinnemoen list_del(&slot->queue_node); 1062965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "list not empty: %s is next\n", 1063965ebf33SHaavard Skinnemoen mmc_hostname(slot->mmc)); 1064965ebf33SHaavard Skinnemoen host->state = STATE_SENDING_CMD; 1065965ebf33SHaavard Skinnemoen atmci_start_request(host, slot); 1066965ebf33SHaavard Skinnemoen } else { 1067965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, "list empty\n"); 1068965ebf33SHaavard Skinnemoen host->state = STATE_IDLE; 1069965ebf33SHaavard Skinnemoen } 1070965ebf33SHaavard Skinnemoen 1071965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 1072965ebf33SHaavard Skinnemoen mmc_request_done(prev_mmc, mrq); 1073965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1074965ebf33SHaavard Skinnemoen } 1075965ebf33SHaavard Skinnemoen 10767d2be074SHaavard Skinnemoen static void atmci_command_complete(struct atmel_mci *host, 1077c06ad258SHaavard Skinnemoen struct mmc_command *cmd) 10787d2be074SHaavard Skinnemoen { 1079c06ad258SHaavard Skinnemoen u32 status = host->cmd_status; 1080c06ad258SHaavard Skinnemoen 10817d2be074SHaavard Skinnemoen /* Read the response from the card (up to 16 bytes) */ 10827d2be074SHaavard Skinnemoen cmd->resp[0] = mci_readl(host, RSPR); 10837d2be074SHaavard Skinnemoen cmd->resp[1] = mci_readl(host, RSPR); 10847d2be074SHaavard Skinnemoen cmd->resp[2] = mci_readl(host, RSPR); 10857d2be074SHaavard Skinnemoen cmd->resp[3] = mci_readl(host, RSPR); 10867d2be074SHaavard Skinnemoen 10877d2be074SHaavard Skinnemoen if (status & MCI_RTOE) 10887d2be074SHaavard Skinnemoen cmd->error = -ETIMEDOUT; 10897d2be074SHaavard Skinnemoen else if ((cmd->flags & MMC_RSP_CRC) && (status & MCI_RCRCE)) 10907d2be074SHaavard Skinnemoen cmd->error = -EILSEQ; 10917d2be074SHaavard Skinnemoen else if (status & (MCI_RINDE | MCI_RDIRE | MCI_RENDE)) 10927d2be074SHaavard Skinnemoen cmd->error = -EIO; 10937d2be074SHaavard Skinnemoen else 10947d2be074SHaavard Skinnemoen cmd->error = 0; 10957d2be074SHaavard Skinnemoen 10967d2be074SHaavard Skinnemoen if (cmd->error) { 1097965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 10987d2be074SHaavard Skinnemoen "command error: status=0x%08x\n", status); 10997d2be074SHaavard Skinnemoen 11007d2be074SHaavard Skinnemoen if (cmd->data) { 11017d2be074SHaavard Skinnemoen host->data = NULL; 110265e8b083SHaavard Skinnemoen atmci_stop_dma(host); 11037d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_NOTBUSY 11047d2be074SHaavard Skinnemoen | MCI_TXRDY | MCI_RXRDY 11057d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS); 11067d2be074SHaavard Skinnemoen } 11077d2be074SHaavard Skinnemoen } 11087d2be074SHaavard Skinnemoen } 11097d2be074SHaavard Skinnemoen 11107d2be074SHaavard Skinnemoen static void atmci_detect_change(unsigned long data) 11117d2be074SHaavard Skinnemoen { 1112965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = (struct atmel_mci_slot *)data; 1113965ebf33SHaavard Skinnemoen bool present; 1114965ebf33SHaavard Skinnemoen bool present_old; 11157d2be074SHaavard Skinnemoen 11167d2be074SHaavard Skinnemoen /* 1117965ebf33SHaavard Skinnemoen * atmci_cleanup_slot() sets the ATMCI_SHUTDOWN flag before 1118965ebf33SHaavard Skinnemoen * freeing the interrupt. We must not re-enable the interrupt 1119965ebf33SHaavard Skinnemoen * if it has been freed, and if we're shutting down, it 1120965ebf33SHaavard Skinnemoen * doesn't really matter whether the card is present or not. 11217d2be074SHaavard Skinnemoen */ 11227d2be074SHaavard Skinnemoen smp_rmb(); 1123965ebf33SHaavard Skinnemoen if (test_bit(ATMCI_SHUTDOWN, &slot->flags)) 11247d2be074SHaavard Skinnemoen return; 11257d2be074SHaavard Skinnemoen 1126965ebf33SHaavard Skinnemoen enable_irq(gpio_to_irq(slot->detect_pin)); 11271c1452beSJonas Larsson present = !(gpio_get_value(slot->detect_pin) ^ 11281c1452beSJonas Larsson slot->detect_is_active_high); 1129965ebf33SHaavard Skinnemoen present_old = test_bit(ATMCI_CARD_PRESENT, &slot->flags); 11307d2be074SHaavard Skinnemoen 1131965ebf33SHaavard Skinnemoen dev_vdbg(&slot->mmc->class_dev, "detect change: %d (was %d)\n", 1132965ebf33SHaavard Skinnemoen present, present_old); 11337d2be074SHaavard Skinnemoen 1134965ebf33SHaavard Skinnemoen if (present != present_old) { 1135965ebf33SHaavard Skinnemoen struct atmel_mci *host = slot->host; 1136965ebf33SHaavard Skinnemoen struct mmc_request *mrq; 1137965ebf33SHaavard Skinnemoen 1138965ebf33SHaavard Skinnemoen dev_dbg(&slot->mmc->class_dev, "card %s\n", 11397d2be074SHaavard Skinnemoen present ? "inserted" : "removed"); 11407d2be074SHaavard Skinnemoen 1141965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1142965ebf33SHaavard Skinnemoen 1143965ebf33SHaavard Skinnemoen if (!present) 1144965ebf33SHaavard Skinnemoen clear_bit(ATMCI_CARD_PRESENT, &slot->flags); 1145965ebf33SHaavard Skinnemoen else 1146965ebf33SHaavard Skinnemoen set_bit(ATMCI_CARD_PRESENT, &slot->flags); 11477d2be074SHaavard Skinnemoen 11487d2be074SHaavard Skinnemoen /* Clean up queue if present */ 1149965ebf33SHaavard Skinnemoen mrq = slot->mrq; 11507d2be074SHaavard Skinnemoen if (mrq) { 1151965ebf33SHaavard Skinnemoen if (mrq == host->mrq) { 11527d2be074SHaavard Skinnemoen /* 11537d2be074SHaavard Skinnemoen * Reset controller to terminate any ongoing 11547d2be074SHaavard Skinnemoen * commands or data transfers. 11557d2be074SHaavard Skinnemoen */ 11567d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 1157965ebf33SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIEN); 1158965ebf33SHaavard Skinnemoen mci_writel(host, MR, host->mode_reg); 115974791a2dSNicolas Ferre if (atmci_is_mci2()) 116074791a2dSNicolas Ferre mci_writel(host, CFG, host->cfg_reg); 11617d2be074SHaavard Skinnemoen 11627d2be074SHaavard Skinnemoen host->data = NULL; 11637d2be074SHaavard Skinnemoen host->cmd = NULL; 1164c06ad258SHaavard Skinnemoen 1165c06ad258SHaavard Skinnemoen switch (host->state) { 1166965ebf33SHaavard Skinnemoen case STATE_IDLE: 1167965ebf33SHaavard Skinnemoen break; 1168c06ad258SHaavard Skinnemoen case STATE_SENDING_CMD: 1169c06ad258SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 1170c06ad258SHaavard Skinnemoen if (!mrq->data) 1171c06ad258SHaavard Skinnemoen break; 1172c06ad258SHaavard Skinnemoen /* fall through */ 1173c06ad258SHaavard Skinnemoen case STATE_SENDING_DATA: 1174c06ad258SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 117565e8b083SHaavard Skinnemoen atmci_stop_dma(host); 1176c06ad258SHaavard Skinnemoen break; 1177c06ad258SHaavard Skinnemoen case STATE_DATA_BUSY: 1178c06ad258SHaavard Skinnemoen case STATE_DATA_ERROR: 1179c06ad258SHaavard Skinnemoen if (mrq->data->error == -EINPROGRESS) 1180c06ad258SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 1181c06ad258SHaavard Skinnemoen if (!mrq->stop) 1182c06ad258SHaavard Skinnemoen break; 1183c06ad258SHaavard Skinnemoen /* fall through */ 1184c06ad258SHaavard Skinnemoen case STATE_SENDING_STOP: 1185c06ad258SHaavard Skinnemoen mrq->stop->error = -ENOMEDIUM; 1186c06ad258SHaavard Skinnemoen break; 1187c06ad258SHaavard Skinnemoen } 1188c06ad258SHaavard Skinnemoen 1189965ebf33SHaavard Skinnemoen atmci_request_end(host, mrq); 1190965ebf33SHaavard Skinnemoen } else { 1191965ebf33SHaavard Skinnemoen list_del(&slot->queue_node); 1192965ebf33SHaavard Skinnemoen mrq->cmd->error = -ENOMEDIUM; 1193965ebf33SHaavard Skinnemoen if (mrq->data) 1194965ebf33SHaavard Skinnemoen mrq->data->error = -ENOMEDIUM; 1195965ebf33SHaavard Skinnemoen if (mrq->stop) 1196965ebf33SHaavard Skinnemoen mrq->stop->error = -ENOMEDIUM; 11977d2be074SHaavard Skinnemoen 1198965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 1199965ebf33SHaavard Skinnemoen mmc_request_done(slot->mmc, mrq); 1200965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1201965ebf33SHaavard Skinnemoen } 1202965ebf33SHaavard Skinnemoen } 1203965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 1204965ebf33SHaavard Skinnemoen 1205965ebf33SHaavard Skinnemoen mmc_detect_change(slot->mmc, 0); 12067d2be074SHaavard Skinnemoen } 12077d2be074SHaavard Skinnemoen } 12087d2be074SHaavard Skinnemoen 12097d2be074SHaavard Skinnemoen static void atmci_tasklet_func(unsigned long priv) 12107d2be074SHaavard Skinnemoen { 1211965ebf33SHaavard Skinnemoen struct atmel_mci *host = (struct atmel_mci *)priv; 12127d2be074SHaavard Skinnemoen struct mmc_request *mrq = host->mrq; 12137d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 1214c06ad258SHaavard Skinnemoen struct mmc_command *cmd = host->cmd; 1215c06ad258SHaavard Skinnemoen enum atmel_mci_state state = host->state; 1216c06ad258SHaavard Skinnemoen enum atmel_mci_state prev_state; 1217c06ad258SHaavard Skinnemoen u32 status; 1218c06ad258SHaavard Skinnemoen 1219965ebf33SHaavard Skinnemoen spin_lock(&host->lock); 1220965ebf33SHaavard Skinnemoen 1221c06ad258SHaavard Skinnemoen state = host->state; 12227d2be074SHaavard Skinnemoen 1223965ebf33SHaavard Skinnemoen dev_vdbg(&host->pdev->dev, 1224c06ad258SHaavard Skinnemoen "tasklet: state %u pending/completed/mask %lx/%lx/%x\n", 1225c06ad258SHaavard Skinnemoen state, host->pending_events, host->completed_events, 12267d2be074SHaavard Skinnemoen mci_readl(host, IMR)); 12277d2be074SHaavard Skinnemoen 1228c06ad258SHaavard Skinnemoen do { 1229c06ad258SHaavard Skinnemoen prev_state = state; 1230c06ad258SHaavard Skinnemoen 1231c06ad258SHaavard Skinnemoen switch (state) { 1232965ebf33SHaavard Skinnemoen case STATE_IDLE: 1233965ebf33SHaavard Skinnemoen break; 1234965ebf33SHaavard Skinnemoen 1235c06ad258SHaavard Skinnemoen case STATE_SENDING_CMD: 1236c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1237c06ad258SHaavard Skinnemoen EVENT_CMD_COMPLETE)) 1238c06ad258SHaavard Skinnemoen break; 1239c06ad258SHaavard Skinnemoen 12407d2be074SHaavard Skinnemoen host->cmd = NULL; 12417d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_CMD_COMPLETE); 1242c06ad258SHaavard Skinnemoen atmci_command_complete(host, mrq->cmd); 1243c06ad258SHaavard Skinnemoen if (!mrq->data || cmd->error) { 1244965ebf33SHaavard Skinnemoen atmci_request_end(host, host->mrq); 1245965ebf33SHaavard Skinnemoen goto unlock; 12467d2be074SHaavard Skinnemoen } 1247c06ad258SHaavard Skinnemoen 1248c06ad258SHaavard Skinnemoen prev_state = state = STATE_SENDING_DATA; 1249c06ad258SHaavard Skinnemoen /* fall through */ 1250c06ad258SHaavard Skinnemoen 1251c06ad258SHaavard Skinnemoen case STATE_SENDING_DATA: 1252c06ad258SHaavard Skinnemoen if (atmci_test_and_clear_pending(host, 1253c06ad258SHaavard Skinnemoen EVENT_DATA_ERROR)) { 125465e8b083SHaavard Skinnemoen atmci_stop_dma(host); 1255c06ad258SHaavard Skinnemoen if (data->stop) 1256965ebf33SHaavard Skinnemoen send_stop_cmd(host, data); 1257c06ad258SHaavard Skinnemoen state = STATE_DATA_ERROR; 1258c06ad258SHaavard Skinnemoen break; 12597d2be074SHaavard Skinnemoen } 12607d2be074SHaavard Skinnemoen 1261c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1262c06ad258SHaavard Skinnemoen EVENT_XFER_COMPLETE)) 1263c06ad258SHaavard Skinnemoen break; 12647d2be074SHaavard Skinnemoen 1265c06ad258SHaavard Skinnemoen atmci_set_completed(host, EVENT_XFER_COMPLETE); 1266c06ad258SHaavard Skinnemoen prev_state = state = STATE_DATA_BUSY; 1267c06ad258SHaavard Skinnemoen /* fall through */ 1268c06ad258SHaavard Skinnemoen 1269c06ad258SHaavard Skinnemoen case STATE_DATA_BUSY: 1270c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1271c06ad258SHaavard Skinnemoen EVENT_DATA_COMPLETE)) 1272c06ad258SHaavard Skinnemoen break; 1273c06ad258SHaavard Skinnemoen 1274c06ad258SHaavard Skinnemoen host->data = NULL; 12757d2be074SHaavard Skinnemoen atmci_set_completed(host, EVENT_DATA_COMPLETE); 1276c06ad258SHaavard Skinnemoen status = host->data_status; 1277c06ad258SHaavard Skinnemoen if (unlikely(status & ATMCI_DATA_ERROR_FLAGS)) { 12787d2be074SHaavard Skinnemoen if (status & MCI_DTOE) { 1279965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 12807d2be074SHaavard Skinnemoen "data timeout error\n"); 12817d2be074SHaavard Skinnemoen data->error = -ETIMEDOUT; 12827d2be074SHaavard Skinnemoen } else if (status & MCI_DCRCE) { 1283965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 1284c06ad258SHaavard Skinnemoen "data CRC error\n"); 12857d2be074SHaavard Skinnemoen data->error = -EILSEQ; 12867d2be074SHaavard Skinnemoen } else { 1287965ebf33SHaavard Skinnemoen dev_dbg(&host->pdev->dev, 12887d2be074SHaavard Skinnemoen "data FIFO error (status=%08x)\n", 12897d2be074SHaavard Skinnemoen status); 12907d2be074SHaavard Skinnemoen data->error = -EIO; 12917d2be074SHaavard Skinnemoen } 1292c06ad258SHaavard Skinnemoen } else { 12937d2be074SHaavard Skinnemoen data->bytes_xfered = data->blocks * data->blksz; 12947d2be074SHaavard Skinnemoen data->error = 0; 12957d2be074SHaavard Skinnemoen } 12967d2be074SHaavard Skinnemoen 1297c06ad258SHaavard Skinnemoen if (!data->stop) { 1298965ebf33SHaavard Skinnemoen atmci_request_end(host, host->mrq); 1299965ebf33SHaavard Skinnemoen goto unlock; 13007d2be074SHaavard Skinnemoen } 13017d2be074SHaavard Skinnemoen 1302c06ad258SHaavard Skinnemoen prev_state = state = STATE_SENDING_STOP; 1303c06ad258SHaavard Skinnemoen if (!data->error) 1304965ebf33SHaavard Skinnemoen send_stop_cmd(host, data); 1305c06ad258SHaavard Skinnemoen /* fall through */ 1306c06ad258SHaavard Skinnemoen 1307c06ad258SHaavard Skinnemoen case STATE_SENDING_STOP: 1308c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1309c06ad258SHaavard Skinnemoen EVENT_CMD_COMPLETE)) 1310c06ad258SHaavard Skinnemoen break; 1311c06ad258SHaavard Skinnemoen 1312c06ad258SHaavard Skinnemoen host->cmd = NULL; 1313c06ad258SHaavard Skinnemoen atmci_command_complete(host, mrq->stop); 1314965ebf33SHaavard Skinnemoen atmci_request_end(host, host->mrq); 1315965ebf33SHaavard Skinnemoen goto unlock; 1316c06ad258SHaavard Skinnemoen 1317c06ad258SHaavard Skinnemoen case STATE_DATA_ERROR: 1318c06ad258SHaavard Skinnemoen if (!atmci_test_and_clear_pending(host, 1319c06ad258SHaavard Skinnemoen EVENT_XFER_COMPLETE)) 1320c06ad258SHaavard Skinnemoen break; 1321c06ad258SHaavard Skinnemoen 1322c06ad258SHaavard Skinnemoen state = STATE_DATA_BUSY; 1323c06ad258SHaavard Skinnemoen break; 1324c06ad258SHaavard Skinnemoen } 1325c06ad258SHaavard Skinnemoen } while (state != prev_state); 1326c06ad258SHaavard Skinnemoen 1327c06ad258SHaavard Skinnemoen host->state = state; 1328965ebf33SHaavard Skinnemoen 1329965ebf33SHaavard Skinnemoen unlock: 1330965ebf33SHaavard Skinnemoen spin_unlock(&host->lock); 13317d2be074SHaavard Skinnemoen } 13327d2be074SHaavard Skinnemoen 13337d2be074SHaavard Skinnemoen static void atmci_read_data_pio(struct atmel_mci *host) 13347d2be074SHaavard Skinnemoen { 13357d2be074SHaavard Skinnemoen struct scatterlist *sg = host->sg; 13367d2be074SHaavard Skinnemoen void *buf = sg_virt(sg); 13377d2be074SHaavard Skinnemoen unsigned int offset = host->pio_offset; 13387d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 13397d2be074SHaavard Skinnemoen u32 value; 13407d2be074SHaavard Skinnemoen u32 status; 13417d2be074SHaavard Skinnemoen unsigned int nbytes = 0; 13427d2be074SHaavard Skinnemoen 13437d2be074SHaavard Skinnemoen do { 13447d2be074SHaavard Skinnemoen value = mci_readl(host, RDR); 13457d2be074SHaavard Skinnemoen if (likely(offset + 4 <= sg->length)) { 13467d2be074SHaavard Skinnemoen put_unaligned(value, (u32 *)(buf + offset)); 13477d2be074SHaavard Skinnemoen 13487d2be074SHaavard Skinnemoen offset += 4; 13497d2be074SHaavard Skinnemoen nbytes += 4; 13507d2be074SHaavard Skinnemoen 13517d2be074SHaavard Skinnemoen if (offset == sg->length) { 13525e7184aeSHaavard Skinnemoen flush_dcache_page(sg_page(sg)); 13537d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 13547d2be074SHaavard Skinnemoen if (!sg) 13557d2be074SHaavard Skinnemoen goto done; 13567d2be074SHaavard Skinnemoen 13577d2be074SHaavard Skinnemoen offset = 0; 13587d2be074SHaavard Skinnemoen buf = sg_virt(sg); 13597d2be074SHaavard Skinnemoen } 13607d2be074SHaavard Skinnemoen } else { 13617d2be074SHaavard Skinnemoen unsigned int remaining = sg->length - offset; 13627d2be074SHaavard Skinnemoen memcpy(buf + offset, &value, remaining); 13637d2be074SHaavard Skinnemoen nbytes += remaining; 13647d2be074SHaavard Skinnemoen 13657d2be074SHaavard Skinnemoen flush_dcache_page(sg_page(sg)); 13667d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 13677d2be074SHaavard Skinnemoen if (!sg) 13687d2be074SHaavard Skinnemoen goto done; 13697d2be074SHaavard Skinnemoen 13707d2be074SHaavard Skinnemoen offset = 4 - remaining; 13717d2be074SHaavard Skinnemoen buf = sg_virt(sg); 13727d2be074SHaavard Skinnemoen memcpy(buf, (u8 *)&value + remaining, offset); 13737d2be074SHaavard Skinnemoen nbytes += offset; 13747d2be074SHaavard Skinnemoen } 13757d2be074SHaavard Skinnemoen 13767d2be074SHaavard Skinnemoen status = mci_readl(host, SR); 13777d2be074SHaavard Skinnemoen if (status & ATMCI_DATA_ERROR_FLAGS) { 13787d2be074SHaavard Skinnemoen mci_writel(host, IDR, (MCI_NOTBUSY | MCI_RXRDY 13797d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS)); 13807d2be074SHaavard Skinnemoen host->data_status = status; 1381965ebf33SHaavard Skinnemoen data->bytes_xfered += nbytes; 1382965ebf33SHaavard Skinnemoen smp_wmb(); 13837d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 13847d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 1385965ebf33SHaavard Skinnemoen return; 13867d2be074SHaavard Skinnemoen } 13877d2be074SHaavard Skinnemoen } while (status & MCI_RXRDY); 13887d2be074SHaavard Skinnemoen 13897d2be074SHaavard Skinnemoen host->pio_offset = offset; 13907d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 13917d2be074SHaavard Skinnemoen 13927d2be074SHaavard Skinnemoen return; 13937d2be074SHaavard Skinnemoen 13947d2be074SHaavard Skinnemoen done: 13957d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_RXRDY); 13967d2be074SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 13977d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 1398965ebf33SHaavard Skinnemoen smp_wmb(); 1399c06ad258SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 14007d2be074SHaavard Skinnemoen } 14017d2be074SHaavard Skinnemoen 14027d2be074SHaavard Skinnemoen static void atmci_write_data_pio(struct atmel_mci *host) 14037d2be074SHaavard Skinnemoen { 14047d2be074SHaavard Skinnemoen struct scatterlist *sg = host->sg; 14057d2be074SHaavard Skinnemoen void *buf = sg_virt(sg); 14067d2be074SHaavard Skinnemoen unsigned int offset = host->pio_offset; 14077d2be074SHaavard Skinnemoen struct mmc_data *data = host->data; 14087d2be074SHaavard Skinnemoen u32 value; 14097d2be074SHaavard Skinnemoen u32 status; 14107d2be074SHaavard Skinnemoen unsigned int nbytes = 0; 14117d2be074SHaavard Skinnemoen 14127d2be074SHaavard Skinnemoen do { 14137d2be074SHaavard Skinnemoen if (likely(offset + 4 <= sg->length)) { 14147d2be074SHaavard Skinnemoen value = get_unaligned((u32 *)(buf + offset)); 14157d2be074SHaavard Skinnemoen mci_writel(host, TDR, value); 14167d2be074SHaavard Skinnemoen 14177d2be074SHaavard Skinnemoen offset += 4; 14187d2be074SHaavard Skinnemoen nbytes += 4; 14197d2be074SHaavard Skinnemoen if (offset == sg->length) { 14207d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 14217d2be074SHaavard Skinnemoen if (!sg) 14227d2be074SHaavard Skinnemoen goto done; 14237d2be074SHaavard Skinnemoen 14247d2be074SHaavard Skinnemoen offset = 0; 14257d2be074SHaavard Skinnemoen buf = sg_virt(sg); 14267d2be074SHaavard Skinnemoen } 14277d2be074SHaavard Skinnemoen } else { 14287d2be074SHaavard Skinnemoen unsigned int remaining = sg->length - offset; 14297d2be074SHaavard Skinnemoen 14307d2be074SHaavard Skinnemoen value = 0; 14317d2be074SHaavard Skinnemoen memcpy(&value, buf + offset, remaining); 14327d2be074SHaavard Skinnemoen nbytes += remaining; 14337d2be074SHaavard Skinnemoen 14347d2be074SHaavard Skinnemoen host->sg = sg = sg_next(sg); 14357d2be074SHaavard Skinnemoen if (!sg) { 14367d2be074SHaavard Skinnemoen mci_writel(host, TDR, value); 14377d2be074SHaavard Skinnemoen goto done; 14387d2be074SHaavard Skinnemoen } 14397d2be074SHaavard Skinnemoen 14407d2be074SHaavard Skinnemoen offset = 4 - remaining; 14417d2be074SHaavard Skinnemoen buf = sg_virt(sg); 14427d2be074SHaavard Skinnemoen memcpy((u8 *)&value + remaining, buf, offset); 14437d2be074SHaavard Skinnemoen mci_writel(host, TDR, value); 14447d2be074SHaavard Skinnemoen nbytes += offset; 14457d2be074SHaavard Skinnemoen } 14467d2be074SHaavard Skinnemoen 14477d2be074SHaavard Skinnemoen status = mci_readl(host, SR); 14487d2be074SHaavard Skinnemoen if (status & ATMCI_DATA_ERROR_FLAGS) { 14497d2be074SHaavard Skinnemoen mci_writel(host, IDR, (MCI_NOTBUSY | MCI_TXRDY 14507d2be074SHaavard Skinnemoen | ATMCI_DATA_ERROR_FLAGS)); 14517d2be074SHaavard Skinnemoen host->data_status = status; 1452965ebf33SHaavard Skinnemoen data->bytes_xfered += nbytes; 1453965ebf33SHaavard Skinnemoen smp_wmb(); 14547d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 14557d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 1456965ebf33SHaavard Skinnemoen return; 14577d2be074SHaavard Skinnemoen } 14587d2be074SHaavard Skinnemoen } while (status & MCI_TXRDY); 14597d2be074SHaavard Skinnemoen 14607d2be074SHaavard Skinnemoen host->pio_offset = offset; 14617d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 14627d2be074SHaavard Skinnemoen 14637d2be074SHaavard Skinnemoen return; 14647d2be074SHaavard Skinnemoen 14657d2be074SHaavard Skinnemoen done: 14667d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_TXRDY); 14677d2be074SHaavard Skinnemoen mci_writel(host, IER, MCI_NOTBUSY); 14687d2be074SHaavard Skinnemoen data->bytes_xfered += nbytes; 1469965ebf33SHaavard Skinnemoen smp_wmb(); 1470c06ad258SHaavard Skinnemoen atmci_set_pending(host, EVENT_XFER_COMPLETE); 14717d2be074SHaavard Skinnemoen } 14727d2be074SHaavard Skinnemoen 1473965ebf33SHaavard Skinnemoen static void atmci_cmd_interrupt(struct atmel_mci *host, u32 status) 14747d2be074SHaavard Skinnemoen { 14757d2be074SHaavard Skinnemoen mci_writel(host, IDR, MCI_CMDRDY); 14767d2be074SHaavard Skinnemoen 14777d2be074SHaavard Skinnemoen host->cmd_status = status; 1478965ebf33SHaavard Skinnemoen smp_wmb(); 14797d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_CMD_COMPLETE); 14807d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 14817d2be074SHaavard Skinnemoen } 14827d2be074SHaavard Skinnemoen 14837d2be074SHaavard Skinnemoen static irqreturn_t atmci_interrupt(int irq, void *dev_id) 14847d2be074SHaavard Skinnemoen { 1485965ebf33SHaavard Skinnemoen struct atmel_mci *host = dev_id; 14867d2be074SHaavard Skinnemoen u32 status, mask, pending; 14877d2be074SHaavard Skinnemoen unsigned int pass_count = 0; 14887d2be074SHaavard Skinnemoen 14897d2be074SHaavard Skinnemoen do { 14907d2be074SHaavard Skinnemoen status = mci_readl(host, SR); 14917d2be074SHaavard Skinnemoen mask = mci_readl(host, IMR); 14927d2be074SHaavard Skinnemoen pending = status & mask; 14937d2be074SHaavard Skinnemoen if (!pending) 14947d2be074SHaavard Skinnemoen break; 14957d2be074SHaavard Skinnemoen 14967d2be074SHaavard Skinnemoen if (pending & ATMCI_DATA_ERROR_FLAGS) { 14977d2be074SHaavard Skinnemoen mci_writel(host, IDR, ATMCI_DATA_ERROR_FLAGS 14987d2be074SHaavard Skinnemoen | MCI_RXRDY | MCI_TXRDY); 14997d2be074SHaavard Skinnemoen pending &= mci_readl(host, IMR); 1500965ebf33SHaavard Skinnemoen 15017d2be074SHaavard Skinnemoen host->data_status = status; 1502965ebf33SHaavard Skinnemoen smp_wmb(); 15037d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_ERROR); 15047d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 15057d2be074SHaavard Skinnemoen } 15067d2be074SHaavard Skinnemoen if (pending & MCI_NOTBUSY) { 1507c06ad258SHaavard Skinnemoen mci_writel(host, IDR, 1508c06ad258SHaavard Skinnemoen ATMCI_DATA_ERROR_FLAGS | MCI_NOTBUSY); 1509ca55f46eSHaavard Skinnemoen if (!host->data_status) 1510c06ad258SHaavard Skinnemoen host->data_status = status; 1511965ebf33SHaavard Skinnemoen smp_wmb(); 15127d2be074SHaavard Skinnemoen atmci_set_pending(host, EVENT_DATA_COMPLETE); 15137d2be074SHaavard Skinnemoen tasklet_schedule(&host->tasklet); 15147d2be074SHaavard Skinnemoen } 15157d2be074SHaavard Skinnemoen if (pending & MCI_RXRDY) 15167d2be074SHaavard Skinnemoen atmci_read_data_pio(host); 15177d2be074SHaavard Skinnemoen if (pending & MCI_TXRDY) 15187d2be074SHaavard Skinnemoen atmci_write_data_pio(host); 15197d2be074SHaavard Skinnemoen 15207d2be074SHaavard Skinnemoen if (pending & MCI_CMDRDY) 1521965ebf33SHaavard Skinnemoen atmci_cmd_interrupt(host, status); 15227d2be074SHaavard Skinnemoen } while (pass_count++ < 5); 15237d2be074SHaavard Skinnemoen 15247d2be074SHaavard Skinnemoen return pass_count ? IRQ_HANDLED : IRQ_NONE; 15257d2be074SHaavard Skinnemoen } 15267d2be074SHaavard Skinnemoen 15277d2be074SHaavard Skinnemoen static irqreturn_t atmci_detect_interrupt(int irq, void *dev_id) 15287d2be074SHaavard Skinnemoen { 1529965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot = dev_id; 15307d2be074SHaavard Skinnemoen 15317d2be074SHaavard Skinnemoen /* 15327d2be074SHaavard Skinnemoen * Disable interrupts until the pin has stabilized and check 15337d2be074SHaavard Skinnemoen * the state then. Use mod_timer() since we may be in the 15347d2be074SHaavard Skinnemoen * middle of the timer routine when this interrupt triggers. 15357d2be074SHaavard Skinnemoen */ 15367d2be074SHaavard Skinnemoen disable_irq_nosync(irq); 1537965ebf33SHaavard Skinnemoen mod_timer(&slot->detect_timer, jiffies + msecs_to_jiffies(20)); 15387d2be074SHaavard Skinnemoen 15397d2be074SHaavard Skinnemoen return IRQ_HANDLED; 15407d2be074SHaavard Skinnemoen } 15417d2be074SHaavard Skinnemoen 1542965ebf33SHaavard Skinnemoen static int __init atmci_init_slot(struct atmel_mci *host, 1543965ebf33SHaavard Skinnemoen struct mci_slot_pdata *slot_data, unsigned int id, 1544965ebf33SHaavard Skinnemoen u32 sdc_reg) 1545965ebf33SHaavard Skinnemoen { 1546965ebf33SHaavard Skinnemoen struct mmc_host *mmc; 1547965ebf33SHaavard Skinnemoen struct atmel_mci_slot *slot; 1548965ebf33SHaavard Skinnemoen 1549965ebf33SHaavard Skinnemoen mmc = mmc_alloc_host(sizeof(struct atmel_mci_slot), &host->pdev->dev); 1550965ebf33SHaavard Skinnemoen if (!mmc) 1551965ebf33SHaavard Skinnemoen return -ENOMEM; 1552965ebf33SHaavard Skinnemoen 1553965ebf33SHaavard Skinnemoen slot = mmc_priv(mmc); 1554965ebf33SHaavard Skinnemoen slot->mmc = mmc; 1555965ebf33SHaavard Skinnemoen slot->host = host; 1556965ebf33SHaavard Skinnemoen slot->detect_pin = slot_data->detect_pin; 1557965ebf33SHaavard Skinnemoen slot->wp_pin = slot_data->wp_pin; 15581c1452beSJonas Larsson slot->detect_is_active_high = slot_data->detect_is_active_high; 1559965ebf33SHaavard Skinnemoen slot->sdc_reg = sdc_reg; 1560965ebf33SHaavard Skinnemoen 1561965ebf33SHaavard Skinnemoen mmc->ops = &atmci_ops; 1562965ebf33SHaavard Skinnemoen mmc->f_min = DIV_ROUND_UP(host->bus_hz, 512); 1563965ebf33SHaavard Skinnemoen mmc->f_max = host->bus_hz / 2; 1564965ebf33SHaavard Skinnemoen mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; 1565965ebf33SHaavard Skinnemoen if (slot_data->bus_width >= 4) 1566965ebf33SHaavard Skinnemoen mmc->caps |= MMC_CAP_4_BIT_DATA; 1567965ebf33SHaavard Skinnemoen 1568965ebf33SHaavard Skinnemoen mmc->max_hw_segs = 64; 1569965ebf33SHaavard Skinnemoen mmc->max_phys_segs = 64; 1570965ebf33SHaavard Skinnemoen mmc->max_req_size = 32768 * 512; 1571965ebf33SHaavard Skinnemoen mmc->max_blk_size = 32768; 1572965ebf33SHaavard Skinnemoen mmc->max_blk_count = 512; 1573965ebf33SHaavard Skinnemoen 1574965ebf33SHaavard Skinnemoen /* Assume card is present initially */ 1575965ebf33SHaavard Skinnemoen set_bit(ATMCI_CARD_PRESENT, &slot->flags); 1576965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 1577965ebf33SHaavard Skinnemoen if (gpio_request(slot->detect_pin, "mmc_detect")) { 1578965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "no detect pin available\n"); 1579965ebf33SHaavard Skinnemoen slot->detect_pin = -EBUSY; 15801c1452beSJonas Larsson } else if (gpio_get_value(slot->detect_pin) ^ 15811c1452beSJonas Larsson slot->detect_is_active_high) { 1582965ebf33SHaavard Skinnemoen clear_bit(ATMCI_CARD_PRESENT, &slot->flags); 1583965ebf33SHaavard Skinnemoen } 1584965ebf33SHaavard Skinnemoen } 1585965ebf33SHaavard Skinnemoen 1586965ebf33SHaavard Skinnemoen if (!gpio_is_valid(slot->detect_pin)) 1587965ebf33SHaavard Skinnemoen mmc->caps |= MMC_CAP_NEEDS_POLL; 1588965ebf33SHaavard Skinnemoen 1589965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->wp_pin)) { 1590965ebf33SHaavard Skinnemoen if (gpio_request(slot->wp_pin, "mmc_wp")) { 1591965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, "no WP pin available\n"); 1592965ebf33SHaavard Skinnemoen slot->wp_pin = -EBUSY; 1593965ebf33SHaavard Skinnemoen } 1594965ebf33SHaavard Skinnemoen } 1595965ebf33SHaavard Skinnemoen 1596965ebf33SHaavard Skinnemoen host->slot[id] = slot; 1597965ebf33SHaavard Skinnemoen mmc_add_host(mmc); 1598965ebf33SHaavard Skinnemoen 1599965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 1600965ebf33SHaavard Skinnemoen int ret; 1601965ebf33SHaavard Skinnemoen 1602965ebf33SHaavard Skinnemoen setup_timer(&slot->detect_timer, atmci_detect_change, 1603965ebf33SHaavard Skinnemoen (unsigned long)slot); 1604965ebf33SHaavard Skinnemoen 1605965ebf33SHaavard Skinnemoen ret = request_irq(gpio_to_irq(slot->detect_pin), 1606965ebf33SHaavard Skinnemoen atmci_detect_interrupt, 1607965ebf33SHaavard Skinnemoen IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, 1608965ebf33SHaavard Skinnemoen "mmc-detect", slot); 1609965ebf33SHaavard Skinnemoen if (ret) { 1610965ebf33SHaavard Skinnemoen dev_dbg(&mmc->class_dev, 1611965ebf33SHaavard Skinnemoen "could not request IRQ %d for detect pin\n", 1612965ebf33SHaavard Skinnemoen gpio_to_irq(slot->detect_pin)); 1613965ebf33SHaavard Skinnemoen gpio_free(slot->detect_pin); 1614965ebf33SHaavard Skinnemoen slot->detect_pin = -EBUSY; 1615965ebf33SHaavard Skinnemoen } 1616965ebf33SHaavard Skinnemoen } 1617965ebf33SHaavard Skinnemoen 1618965ebf33SHaavard Skinnemoen atmci_init_debugfs(slot); 1619965ebf33SHaavard Skinnemoen 1620965ebf33SHaavard Skinnemoen return 0; 1621965ebf33SHaavard Skinnemoen } 1622965ebf33SHaavard Skinnemoen 1623965ebf33SHaavard Skinnemoen static void __exit atmci_cleanup_slot(struct atmel_mci_slot *slot, 1624965ebf33SHaavard Skinnemoen unsigned int id) 1625965ebf33SHaavard Skinnemoen { 1626965ebf33SHaavard Skinnemoen /* Debugfs stuff is cleaned up by mmc core */ 1627965ebf33SHaavard Skinnemoen 1628965ebf33SHaavard Skinnemoen set_bit(ATMCI_SHUTDOWN, &slot->flags); 1629965ebf33SHaavard Skinnemoen smp_wmb(); 1630965ebf33SHaavard Skinnemoen 1631965ebf33SHaavard Skinnemoen mmc_remove_host(slot->mmc); 1632965ebf33SHaavard Skinnemoen 1633965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->detect_pin)) { 1634965ebf33SHaavard Skinnemoen int pin = slot->detect_pin; 1635965ebf33SHaavard Skinnemoen 1636965ebf33SHaavard Skinnemoen free_irq(gpio_to_irq(pin), slot); 1637965ebf33SHaavard Skinnemoen del_timer_sync(&slot->detect_timer); 1638965ebf33SHaavard Skinnemoen gpio_free(pin); 1639965ebf33SHaavard Skinnemoen } 1640965ebf33SHaavard Skinnemoen if (gpio_is_valid(slot->wp_pin)) 1641965ebf33SHaavard Skinnemoen gpio_free(slot->wp_pin); 1642965ebf33SHaavard Skinnemoen 1643965ebf33SHaavard Skinnemoen slot->host->slot[id] = NULL; 1644965ebf33SHaavard Skinnemoen mmc_free_host(slot->mmc); 1645965ebf33SHaavard Skinnemoen } 1646965ebf33SHaavard Skinnemoen 164774465b4fSDan Williams #ifdef CONFIG_MMC_ATMELMCI_DMA 16487dd60251SDan Williams static bool filter(struct dma_chan *chan, void *slave) 164974465b4fSDan Williams { 16502635d1baSNicolas Ferre struct mci_dma_data *sl = slave; 165174465b4fSDan Williams 16522635d1baSNicolas Ferre if (sl && find_slave_dev(sl) == chan->device->dev) { 16532635d1baSNicolas Ferre chan->private = slave_data_ptr(sl); 16547dd60251SDan Williams return true; 16552635d1baSNicolas Ferre } else { 16567dd60251SDan Williams return false; 165774465b4fSDan Williams } 16582635d1baSNicolas Ferre } 16592635d1baSNicolas Ferre 16602635d1baSNicolas Ferre static void atmci_configure_dma(struct atmel_mci *host) 16612635d1baSNicolas Ferre { 16622635d1baSNicolas Ferre struct mci_platform_data *pdata; 16632635d1baSNicolas Ferre 16642635d1baSNicolas Ferre if (host == NULL) 16652635d1baSNicolas Ferre return; 16662635d1baSNicolas Ferre 16672635d1baSNicolas Ferre pdata = host->pdev->dev.platform_data; 16682635d1baSNicolas Ferre 16692635d1baSNicolas Ferre if (pdata && find_slave_dev(pdata->dma_slave)) { 16702635d1baSNicolas Ferre dma_cap_mask_t mask; 16712635d1baSNicolas Ferre 16722635d1baSNicolas Ferre setup_dma_addr(pdata->dma_slave, 16732635d1baSNicolas Ferre host->mapbase + MCI_TDR, 16742635d1baSNicolas Ferre host->mapbase + MCI_RDR); 16752635d1baSNicolas Ferre 16762635d1baSNicolas Ferre /* Try to grab a DMA channel */ 16772635d1baSNicolas Ferre dma_cap_zero(mask); 16782635d1baSNicolas Ferre dma_cap_set(DMA_SLAVE, mask); 16792635d1baSNicolas Ferre host->dma.chan = 16802635d1baSNicolas Ferre dma_request_channel(mask, filter, pdata->dma_slave); 16812635d1baSNicolas Ferre } 16822635d1baSNicolas Ferre if (!host->dma.chan) 16832635d1baSNicolas Ferre dev_notice(&host->pdev->dev, "DMA not available, using PIO\n"); 168474791a2dSNicolas Ferre else 168574791a2dSNicolas Ferre dev_info(&host->pdev->dev, 168674791a2dSNicolas Ferre "Using %s for DMA transfers\n", 168774791a2dSNicolas Ferre dma_chan_name(host->dma.chan)); 16882635d1baSNicolas Ferre } 16892635d1baSNicolas Ferre #else 16902635d1baSNicolas Ferre static void atmci_configure_dma(struct atmel_mci *host) {} 169174465b4fSDan Williams #endif 169274465b4fSDan Williams 16937d2be074SHaavard Skinnemoen static int __init atmci_probe(struct platform_device *pdev) 16947d2be074SHaavard Skinnemoen { 16957d2be074SHaavard Skinnemoen struct mci_platform_data *pdata; 16967d2be074SHaavard Skinnemoen struct atmel_mci *host; 16977d2be074SHaavard Skinnemoen struct resource *regs; 1698965ebf33SHaavard Skinnemoen unsigned int nr_slots; 16997d2be074SHaavard Skinnemoen int irq; 17007d2be074SHaavard Skinnemoen int ret; 17017d2be074SHaavard Skinnemoen 17027d2be074SHaavard Skinnemoen regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 17037d2be074SHaavard Skinnemoen if (!regs) 17047d2be074SHaavard Skinnemoen return -ENXIO; 17057d2be074SHaavard Skinnemoen pdata = pdev->dev.platform_data; 17067d2be074SHaavard Skinnemoen if (!pdata) 17077d2be074SHaavard Skinnemoen return -ENXIO; 17087d2be074SHaavard Skinnemoen irq = platform_get_irq(pdev, 0); 17097d2be074SHaavard Skinnemoen if (irq < 0) 17107d2be074SHaavard Skinnemoen return irq; 17117d2be074SHaavard Skinnemoen 1712965ebf33SHaavard Skinnemoen host = kzalloc(sizeof(struct atmel_mci), GFP_KERNEL); 1713965ebf33SHaavard Skinnemoen if (!host) 17147d2be074SHaavard Skinnemoen return -ENOMEM; 17157d2be074SHaavard Skinnemoen 17167d2be074SHaavard Skinnemoen host->pdev = pdev; 1717965ebf33SHaavard Skinnemoen spin_lock_init(&host->lock); 1718965ebf33SHaavard Skinnemoen INIT_LIST_HEAD(&host->queue); 17197d2be074SHaavard Skinnemoen 17207d2be074SHaavard Skinnemoen host->mck = clk_get(&pdev->dev, "mci_clk"); 17217d2be074SHaavard Skinnemoen if (IS_ERR(host->mck)) { 17227d2be074SHaavard Skinnemoen ret = PTR_ERR(host->mck); 17237d2be074SHaavard Skinnemoen goto err_clk_get; 17247d2be074SHaavard Skinnemoen } 17257d2be074SHaavard Skinnemoen 17267d2be074SHaavard Skinnemoen ret = -ENOMEM; 17277d2be074SHaavard Skinnemoen host->regs = ioremap(regs->start, regs->end - regs->start + 1); 17287d2be074SHaavard Skinnemoen if (!host->regs) 17297d2be074SHaavard Skinnemoen goto err_ioremap; 17307d2be074SHaavard Skinnemoen 17317d2be074SHaavard Skinnemoen clk_enable(host->mck); 17327d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_SWRST); 17337d2be074SHaavard Skinnemoen host->bus_hz = clk_get_rate(host->mck); 17347d2be074SHaavard Skinnemoen clk_disable(host->mck); 17357d2be074SHaavard Skinnemoen 17367d2be074SHaavard Skinnemoen host->mapbase = regs->start; 17377d2be074SHaavard Skinnemoen 1738965ebf33SHaavard Skinnemoen tasklet_init(&host->tasklet, atmci_tasklet_func, (unsigned long)host); 17397d2be074SHaavard Skinnemoen 174089c8aa20SKay Sievers ret = request_irq(irq, atmci_interrupt, 0, dev_name(&pdev->dev), host); 17417d2be074SHaavard Skinnemoen if (ret) 17427d2be074SHaavard Skinnemoen goto err_request_irq; 17437d2be074SHaavard Skinnemoen 17442635d1baSNicolas Ferre atmci_configure_dma(host); 174565e8b083SHaavard Skinnemoen 17467d2be074SHaavard Skinnemoen platform_set_drvdata(pdev, host); 17477d2be074SHaavard Skinnemoen 1748965ebf33SHaavard Skinnemoen /* We need at least one slot to succeed */ 1749965ebf33SHaavard Skinnemoen nr_slots = 0; 1750965ebf33SHaavard Skinnemoen ret = -ENODEV; 1751965ebf33SHaavard Skinnemoen if (pdata->slot[0].bus_width) { 1752965ebf33SHaavard Skinnemoen ret = atmci_init_slot(host, &pdata->slot[0], 1753965ebf33SHaavard Skinnemoen MCI_SDCSEL_SLOT_A, 0); 1754965ebf33SHaavard Skinnemoen if (!ret) 1755965ebf33SHaavard Skinnemoen nr_slots++; 17567d2be074SHaavard Skinnemoen } 1757965ebf33SHaavard Skinnemoen if (pdata->slot[1].bus_width) { 1758965ebf33SHaavard Skinnemoen ret = atmci_init_slot(host, &pdata->slot[1], 1759965ebf33SHaavard Skinnemoen MCI_SDCSEL_SLOT_B, 1); 1760965ebf33SHaavard Skinnemoen if (!ret) 1761965ebf33SHaavard Skinnemoen nr_slots++; 17627d2be074SHaavard Skinnemoen } 17637d2be074SHaavard Skinnemoen 176404d699c3SRob Emanuele if (!nr_slots) { 176504d699c3SRob Emanuele dev_err(&pdev->dev, "init failed: no slot defined\n"); 1766965ebf33SHaavard Skinnemoen goto err_init_slot; 176704d699c3SRob Emanuele } 17687d2be074SHaavard Skinnemoen 1769965ebf33SHaavard Skinnemoen dev_info(&pdev->dev, 1770965ebf33SHaavard Skinnemoen "Atmel MCI controller at 0x%08lx irq %d, %u slots\n", 1771965ebf33SHaavard Skinnemoen host->mapbase, irq, nr_slots); 1772deec9ae3SHaavard Skinnemoen 17737d2be074SHaavard Skinnemoen return 0; 17747d2be074SHaavard Skinnemoen 1775965ebf33SHaavard Skinnemoen err_init_slot: 177665e8b083SHaavard Skinnemoen #ifdef CONFIG_MMC_ATMELMCI_DMA 177774465b4fSDan Williams if (host->dma.chan) 177874465b4fSDan Williams dma_release_channel(host->dma.chan); 177965e8b083SHaavard Skinnemoen #endif 1780965ebf33SHaavard Skinnemoen free_irq(irq, host); 17817d2be074SHaavard Skinnemoen err_request_irq: 17827d2be074SHaavard Skinnemoen iounmap(host->regs); 17837d2be074SHaavard Skinnemoen err_ioremap: 17847d2be074SHaavard Skinnemoen clk_put(host->mck); 17857d2be074SHaavard Skinnemoen err_clk_get: 1786965ebf33SHaavard Skinnemoen kfree(host); 17877d2be074SHaavard Skinnemoen return ret; 17887d2be074SHaavard Skinnemoen } 17897d2be074SHaavard Skinnemoen 17907d2be074SHaavard Skinnemoen static int __exit atmci_remove(struct platform_device *pdev) 17917d2be074SHaavard Skinnemoen { 17927d2be074SHaavard Skinnemoen struct atmel_mci *host = platform_get_drvdata(pdev); 1793965ebf33SHaavard Skinnemoen unsigned int i; 17947d2be074SHaavard Skinnemoen 17957d2be074SHaavard Skinnemoen platform_set_drvdata(pdev, NULL); 17967d2be074SHaavard Skinnemoen 1797965ebf33SHaavard Skinnemoen for (i = 0; i < ATMEL_MCI_MAX_NR_SLOTS; i++) { 1798965ebf33SHaavard Skinnemoen if (host->slot[i]) 1799965ebf33SHaavard Skinnemoen atmci_cleanup_slot(host->slot[i], i); 18007d2be074SHaavard Skinnemoen } 18017d2be074SHaavard Skinnemoen 18027d2be074SHaavard Skinnemoen clk_enable(host->mck); 18037d2be074SHaavard Skinnemoen mci_writel(host, IDR, ~0UL); 18047d2be074SHaavard Skinnemoen mci_writel(host, CR, MCI_CR_MCIDIS); 18057d2be074SHaavard Skinnemoen mci_readl(host, SR); 18067d2be074SHaavard Skinnemoen clk_disable(host->mck); 18077d2be074SHaavard Skinnemoen 180865e8b083SHaavard Skinnemoen #ifdef CONFIG_MMC_ATMELMCI_DMA 180974465b4fSDan Williams if (host->dma.chan) 181074465b4fSDan Williams dma_release_channel(host->dma.chan); 181165e8b083SHaavard Skinnemoen #endif 181265e8b083SHaavard Skinnemoen 1813965ebf33SHaavard Skinnemoen free_irq(platform_get_irq(pdev, 0), host); 18147d2be074SHaavard Skinnemoen iounmap(host->regs); 18157d2be074SHaavard Skinnemoen 18167d2be074SHaavard Skinnemoen clk_put(host->mck); 1817965ebf33SHaavard Skinnemoen kfree(host); 18187d2be074SHaavard Skinnemoen 18197d2be074SHaavard Skinnemoen return 0; 18207d2be074SHaavard Skinnemoen } 18217d2be074SHaavard Skinnemoen 18227d2be074SHaavard Skinnemoen static struct platform_driver atmci_driver = { 18237d2be074SHaavard Skinnemoen .remove = __exit_p(atmci_remove), 18247d2be074SHaavard Skinnemoen .driver = { 18257d2be074SHaavard Skinnemoen .name = "atmel_mci", 18267d2be074SHaavard Skinnemoen }, 18277d2be074SHaavard Skinnemoen }; 18287d2be074SHaavard Skinnemoen 18297d2be074SHaavard Skinnemoen static int __init atmci_init(void) 18307d2be074SHaavard Skinnemoen { 18317d2be074SHaavard Skinnemoen return platform_driver_probe(&atmci_driver, atmci_probe); 18327d2be074SHaavard Skinnemoen } 18337d2be074SHaavard Skinnemoen 18347d2be074SHaavard Skinnemoen static void __exit atmci_exit(void) 18357d2be074SHaavard Skinnemoen { 18367d2be074SHaavard Skinnemoen platform_driver_unregister(&atmci_driver); 18377d2be074SHaavard Skinnemoen } 18387d2be074SHaavard Skinnemoen 183974465b4fSDan Williams late_initcall(atmci_init); /* try to load after dma driver when built-in */ 18407d2be074SHaavard Skinnemoen module_exit(atmci_exit); 18417d2be074SHaavard Skinnemoen 18427d2be074SHaavard Skinnemoen MODULE_DESCRIPTION("Atmel Multimedia Card Interface driver"); 18437d2be074SHaavard Skinnemoen MODULE_AUTHOR("Haavard Skinnemoen <haavard.skinnemoen@atmel.com>"); 18447d2be074SHaavard Skinnemoen MODULE_LICENSE("GPL v2"); 1845