Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/mmc/host/tmio_mmc_pio.c |
| 3 | * |
| 4 | * Copyright (C) 2011 Guennadi Liakhovetski |
| 5 | * Copyright (C) 2007 Ian Molton |
| 6 | * Copyright (C) 2004 Ian Molton |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | * Driver for the MMC / SD / SDIO IP found in: |
| 13 | * |
| 14 | * TC6393XB, TC6391XB, TC6387XB, T7L66XB, ASIC3, SH-Mobile SoCs |
| 15 | * |
| 16 | * This driver draws mainly on scattered spec sheets, Reverse engineering |
| 17 | * of the toshiba e800 SD driver and some parts of the 2.4 ASIC3 driver (4 bit |
| 18 | * support). (Further 4 bit support from a later datasheet). |
| 19 | * |
| 20 | * TODO: |
| 21 | * Investigate using a workqueue for PIO transfers |
| 22 | * Eliminate FIXMEs |
| 23 | * SDIO support |
| 24 | * Better Power management |
| 25 | * Handle MMC errors better |
| 26 | * double buffer support |
| 27 | * |
| 28 | */ |
| 29 | |
| 30 | #include <linux/delay.h> |
| 31 | #include <linux/device.h> |
| 32 | #include <linux/highmem.h> |
| 33 | #include <linux/interrupt.h> |
| 34 | #include <linux/io.h> |
| 35 | #include <linux/irq.h> |
| 36 | #include <linux/mfd/tmio.h> |
| 37 | #include <linux/mmc/host.h> |
Simon Horman | cba179a | 2011-03-24 09:48:36 +0100 | [diff] [blame] | 38 | #include <linux/mmc/tmio.h> |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 39 | #include <linux/module.h> |
| 40 | #include <linux/pagemap.h> |
| 41 | #include <linux/platform_device.h> |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 42 | #include <linux/pm_runtime.h> |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 43 | #include <linux/scatterlist.h> |
| 44 | #include <linux/workqueue.h> |
| 45 | #include <linux/spinlock.h> |
| 46 | |
| 47 | #include "tmio_mmc.h" |
| 48 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 49 | void tmio_mmc_enable_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
| 50 | { |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 51 | host->sdcard_irq_mask &= ~(i & TMIO_MASK_IRQ); |
| 52 | sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | void tmio_mmc_disable_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
| 56 | { |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 57 | host->sdcard_irq_mask |= (i & TMIO_MASK_IRQ); |
| 58 | sd_ctrl_write32(host, CTL_IRQ_MASK, host->sdcard_irq_mask); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | static void tmio_mmc_ack_mmc_irqs(struct tmio_mmc_host *host, u32 i) |
| 62 | { |
| 63 | sd_ctrl_write32(host, CTL_STATUS, ~i); |
| 64 | } |
| 65 | |
| 66 | static void tmio_mmc_init_sg(struct tmio_mmc_host *host, struct mmc_data *data) |
| 67 | { |
| 68 | host->sg_len = data->sg_len; |
| 69 | host->sg_ptr = data->sg; |
| 70 | host->sg_orig = data->sg; |
| 71 | host->sg_off = 0; |
| 72 | } |
| 73 | |
| 74 | static int tmio_mmc_next_sg(struct tmio_mmc_host *host) |
| 75 | { |
| 76 | host->sg_ptr = sg_next(host->sg_ptr); |
| 77 | host->sg_off = 0; |
| 78 | return --host->sg_len; |
| 79 | } |
| 80 | |
| 81 | #ifdef CONFIG_MMC_DEBUG |
| 82 | |
| 83 | #define STATUS_TO_TEXT(a, status, i) \ |
| 84 | do { \ |
| 85 | if (status & TMIO_STAT_##a) { \ |
| 86 | if (i++) \ |
| 87 | printk(" | "); \ |
| 88 | printk(#a); \ |
| 89 | } \ |
| 90 | } while (0) |
| 91 | |
| 92 | static void pr_debug_status(u32 status) |
| 93 | { |
| 94 | int i = 0; |
| 95 | printk(KERN_DEBUG "status: %08x = ", status); |
| 96 | STATUS_TO_TEXT(CARD_REMOVE, status, i); |
| 97 | STATUS_TO_TEXT(CARD_INSERT, status, i); |
| 98 | STATUS_TO_TEXT(SIGSTATE, status, i); |
| 99 | STATUS_TO_TEXT(WRPROTECT, status, i); |
| 100 | STATUS_TO_TEXT(CARD_REMOVE_A, status, i); |
| 101 | STATUS_TO_TEXT(CARD_INSERT_A, status, i); |
| 102 | STATUS_TO_TEXT(SIGSTATE_A, status, i); |
| 103 | STATUS_TO_TEXT(CMD_IDX_ERR, status, i); |
| 104 | STATUS_TO_TEXT(STOPBIT_ERR, status, i); |
| 105 | STATUS_TO_TEXT(ILL_FUNC, status, i); |
| 106 | STATUS_TO_TEXT(CMD_BUSY, status, i); |
| 107 | STATUS_TO_TEXT(CMDRESPEND, status, i); |
| 108 | STATUS_TO_TEXT(DATAEND, status, i); |
| 109 | STATUS_TO_TEXT(CRCFAIL, status, i); |
| 110 | STATUS_TO_TEXT(DATATIMEOUT, status, i); |
| 111 | STATUS_TO_TEXT(CMDTIMEOUT, status, i); |
| 112 | STATUS_TO_TEXT(RXOVERFLOW, status, i); |
| 113 | STATUS_TO_TEXT(TXUNDERRUN, status, i); |
| 114 | STATUS_TO_TEXT(RXRDY, status, i); |
| 115 | STATUS_TO_TEXT(TXRQ, status, i); |
| 116 | STATUS_TO_TEXT(ILL_ACCESS, status, i); |
| 117 | printk("\n"); |
| 118 | } |
| 119 | |
| 120 | #else |
| 121 | #define pr_debug_status(s) do { } while (0) |
| 122 | #endif |
| 123 | |
| 124 | static void tmio_mmc_enable_sdio_irq(struct mmc_host *mmc, int enable) |
| 125 | { |
| 126 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 127 | |
| 128 | if (enable) { |
| 129 | host->sdio_irq_enabled = 1; |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 130 | host->sdio_irq_mask = TMIO_SDIO_MASK_ALL & |
| 131 | ~TMIO_SDIO_STAT_IOIRQ; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 132 | sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0001); |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 133 | sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 134 | } else { |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 135 | host->sdio_irq_mask = TMIO_SDIO_MASK_ALL; |
| 136 | sd_ctrl_write16(host, CTL_SDIO_IRQ_MASK, host->sdio_irq_mask); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 137 | sd_ctrl_write16(host, CTL_TRANSACTION_CTL, 0x0000); |
| 138 | host->sdio_irq_enabled = 0; |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | static void tmio_mmc_set_clock(struct tmio_mmc_host *host, int new_clock) |
| 143 | { |
| 144 | u32 clk = 0, clock; |
| 145 | |
| 146 | if (new_clock) { |
| 147 | for (clock = host->mmc->f_min, clk = 0x80000080; |
| 148 | new_clock >= (clock<<1); clk >>= 1) |
| 149 | clock <<= 1; |
| 150 | clk |= 0x100; |
| 151 | } |
| 152 | |
| 153 | if (host->set_clk_div) |
| 154 | host->set_clk_div(host->pdev, (clk>>22) & 1); |
| 155 | |
| 156 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, clk & 0x1ff); |
| 157 | } |
| 158 | |
| 159 | static void tmio_mmc_clk_stop(struct tmio_mmc_host *host) |
| 160 | { |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 161 | struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 162 | |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 163 | /* implicit BUG_ON(!res) */ |
| 164 | if (resource_size(res) > 0x100) { |
| 165 | sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0000); |
| 166 | msleep(10); |
| 167 | } |
Guennadi Liakhovetski | d9b0342 | 2011-03-10 18:43:07 +0100 | [diff] [blame] | 168 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 169 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, ~0x0100 & |
| 170 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); |
| 171 | msleep(10); |
| 172 | } |
| 173 | |
| 174 | static void tmio_mmc_clk_start(struct tmio_mmc_host *host) |
| 175 | { |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 176 | struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 177 | |
| 178 | sd_ctrl_write16(host, CTL_SD_CARD_CLK_CTL, 0x0100 | |
| 179 | sd_ctrl_read16(host, CTL_SD_CARD_CLK_CTL)); |
| 180 | msleep(10); |
Guennadi Liakhovetski | d9b0342 | 2011-03-10 18:43:07 +0100 | [diff] [blame] | 181 | |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 182 | /* implicit BUG_ON(!res) */ |
| 183 | if (resource_size(res) > 0x100) { |
| 184 | sd_ctrl_write16(host, CTL_CLK_AND_WAIT_CTL, 0x0100); |
| 185 | msleep(10); |
| 186 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | static void tmio_mmc_reset(struct tmio_mmc_host *host) |
| 190 | { |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 191 | struct resource *res = platform_get_resource(host->pdev, IORESOURCE_MEM, 0); |
| 192 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 193 | /* FIXME - should we set stop clock reg here */ |
| 194 | sd_ctrl_write16(host, CTL_RESET_SD, 0x0000); |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 195 | /* implicit BUG_ON(!res) */ |
| 196 | if (resource_size(res) > 0x100) |
| 197 | sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0000); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 198 | msleep(10); |
| 199 | sd_ctrl_write16(host, CTL_RESET_SD, 0x0001); |
Guennadi Liakhovetski | 69d1fe1 | 2011-03-09 17:28:55 +0100 | [diff] [blame] | 200 | if (resource_size(res) > 0x100) |
| 201 | sd_ctrl_write16(host, CTL_RESET_SDIO, 0x0001); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 202 | msleep(10); |
| 203 | } |
| 204 | |
| 205 | static void tmio_mmc_reset_work(struct work_struct *work) |
| 206 | { |
| 207 | struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, |
| 208 | delayed_reset_work.work); |
| 209 | struct mmc_request *mrq; |
| 210 | unsigned long flags; |
| 211 | |
| 212 | spin_lock_irqsave(&host->lock, flags); |
| 213 | mrq = host->mrq; |
| 214 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 215 | /* |
| 216 | * is request already finished? Since we use a non-blocking |
| 217 | * cancel_delayed_work(), it can happen, that a .set_ios() call preempts |
| 218 | * us, so, have to check for IS_ERR(host->mrq) |
| 219 | */ |
| 220 | if (IS_ERR_OR_NULL(mrq) |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 221 | || time_is_after_jiffies(host->last_req_ts + |
| 222 | msecs_to_jiffies(2000))) { |
| 223 | spin_unlock_irqrestore(&host->lock, flags); |
| 224 | return; |
| 225 | } |
| 226 | |
| 227 | dev_warn(&host->pdev->dev, |
| 228 | "timeout waiting for hardware interrupt (CMD%u)\n", |
| 229 | mrq->cmd->opcode); |
| 230 | |
| 231 | if (host->data) |
| 232 | host->data->error = -ETIMEDOUT; |
| 233 | else if (host->cmd) |
| 234 | host->cmd->error = -ETIMEDOUT; |
| 235 | else |
| 236 | mrq->cmd->error = -ETIMEDOUT; |
| 237 | |
| 238 | host->cmd = NULL; |
| 239 | host->data = NULL; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 240 | host->force_pio = false; |
| 241 | |
| 242 | spin_unlock_irqrestore(&host->lock, flags); |
| 243 | |
| 244 | tmio_mmc_reset(host); |
| 245 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 246 | /* Ready for new calls */ |
| 247 | host->mrq = NULL; |
| 248 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 249 | mmc_request_done(host->mmc, mrq); |
| 250 | } |
| 251 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 252 | /* called with host->lock held, interrupts disabled */ |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 253 | static void tmio_mmc_finish_request(struct tmio_mmc_host *host) |
| 254 | { |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 255 | struct mmc_request *mrq; |
| 256 | unsigned long flags; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 257 | |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 258 | spin_lock_irqsave(&host->lock, flags); |
| 259 | |
| 260 | mrq = host->mrq; |
| 261 | if (IS_ERR_OR_NULL(mrq)) { |
| 262 | spin_unlock_irqrestore(&host->lock, flags); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 263 | return; |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 264 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 265 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 266 | host->cmd = NULL; |
| 267 | host->data = NULL; |
| 268 | host->force_pio = false; |
| 269 | |
| 270 | cancel_delayed_work(&host->delayed_reset_work); |
| 271 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 272 | host->mrq = NULL; |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 273 | spin_unlock_irqrestore(&host->lock, flags); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 274 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 275 | mmc_request_done(host->mmc, mrq); |
| 276 | } |
| 277 | |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 278 | static void tmio_mmc_done_work(struct work_struct *work) |
| 279 | { |
| 280 | struct tmio_mmc_host *host = container_of(work, struct tmio_mmc_host, |
| 281 | done); |
| 282 | tmio_mmc_finish_request(host); |
| 283 | } |
| 284 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 285 | /* These are the bitmasks the tmio chip requires to implement the MMC response |
| 286 | * types. Note that R1 and R6 are the same in this scheme. */ |
| 287 | #define APP_CMD 0x0040 |
| 288 | #define RESP_NONE 0x0300 |
| 289 | #define RESP_R1 0x0400 |
| 290 | #define RESP_R1B 0x0500 |
| 291 | #define RESP_R2 0x0600 |
| 292 | #define RESP_R3 0x0700 |
| 293 | #define DATA_PRESENT 0x0800 |
| 294 | #define TRANSFER_READ 0x1000 |
| 295 | #define TRANSFER_MULTI 0x2000 |
| 296 | #define SECURITY_CMD 0x4000 |
| 297 | |
| 298 | static int tmio_mmc_start_command(struct tmio_mmc_host *host, struct mmc_command *cmd) |
| 299 | { |
| 300 | struct mmc_data *data = host->data; |
| 301 | int c = cmd->opcode; |
| 302 | |
| 303 | /* Command 12 is handled by hardware */ |
| 304 | if (cmd->opcode == 12 && !cmd->arg) { |
| 305 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x001); |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | switch (mmc_resp_type(cmd)) { |
| 310 | case MMC_RSP_NONE: c |= RESP_NONE; break; |
| 311 | case MMC_RSP_R1: c |= RESP_R1; break; |
| 312 | case MMC_RSP_R1B: c |= RESP_R1B; break; |
| 313 | case MMC_RSP_R2: c |= RESP_R2; break; |
| 314 | case MMC_RSP_R3: c |= RESP_R3; break; |
| 315 | default: |
| 316 | pr_debug("Unknown response type %d\n", mmc_resp_type(cmd)); |
| 317 | return -EINVAL; |
| 318 | } |
| 319 | |
| 320 | host->cmd = cmd; |
| 321 | |
| 322 | /* FIXME - this seems to be ok commented out but the spec suggest this bit |
| 323 | * should be set when issuing app commands. |
| 324 | * if(cmd->flags & MMC_FLAG_ACMD) |
| 325 | * c |= APP_CMD; |
| 326 | */ |
| 327 | if (data) { |
| 328 | c |= DATA_PRESENT; |
| 329 | if (data->blocks > 1) { |
| 330 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x100); |
| 331 | c |= TRANSFER_MULTI; |
| 332 | } |
| 333 | if (data->flags & MMC_DATA_READ) |
| 334 | c |= TRANSFER_READ; |
| 335 | } |
| 336 | |
| 337 | tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_CMD); |
| 338 | |
| 339 | /* Fire off the command */ |
| 340 | sd_ctrl_write32(host, CTL_ARG_REG, cmd->arg); |
| 341 | sd_ctrl_write16(host, CTL_SD_CMD, c); |
| 342 | |
| 343 | return 0; |
| 344 | } |
| 345 | |
| 346 | /* |
| 347 | * This chip always returns (at least?) as much data as you ask for. |
| 348 | * I'm unsure what happens if you ask for less than a block. This should be |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 349 | * looked into to ensure that a funny length read doesn't hose the controller. |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 350 | */ |
| 351 | static void tmio_mmc_pio_irq(struct tmio_mmc_host *host) |
| 352 | { |
| 353 | struct mmc_data *data = host->data; |
| 354 | void *sg_virt; |
| 355 | unsigned short *buf; |
| 356 | unsigned int count; |
| 357 | unsigned long flags; |
| 358 | |
| 359 | if ((host->chan_tx || host->chan_rx) && !host->force_pio) { |
| 360 | pr_err("PIO IRQ in DMA mode!\n"); |
| 361 | return; |
| 362 | } else if (!data) { |
| 363 | pr_debug("Spurious PIO IRQ\n"); |
| 364 | return; |
| 365 | } |
| 366 | |
| 367 | sg_virt = tmio_mmc_kmap_atomic(host->sg_ptr, &flags); |
| 368 | buf = (unsigned short *)(sg_virt + host->sg_off); |
| 369 | |
| 370 | count = host->sg_ptr->length - host->sg_off; |
| 371 | if (count > data->blksz) |
| 372 | count = data->blksz; |
| 373 | |
| 374 | pr_debug("count: %08x offset: %08x flags %08x\n", |
| 375 | count, host->sg_off, data->flags); |
| 376 | |
| 377 | /* Transfer the data */ |
| 378 | if (data->flags & MMC_DATA_READ) |
| 379 | sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); |
| 380 | else |
| 381 | sd_ctrl_write16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1); |
| 382 | |
| 383 | host->sg_off += count; |
| 384 | |
| 385 | tmio_mmc_kunmap_atomic(host->sg_ptr, &flags, sg_virt); |
| 386 | |
| 387 | if (host->sg_off == host->sg_ptr->length) |
| 388 | tmio_mmc_next_sg(host); |
| 389 | |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | static void tmio_mmc_check_bounce_buffer(struct tmio_mmc_host *host) |
| 394 | { |
| 395 | if (host->sg_ptr == &host->bounce_sg) { |
| 396 | unsigned long flags; |
| 397 | void *sg_vaddr = tmio_mmc_kmap_atomic(host->sg_orig, &flags); |
| 398 | memcpy(sg_vaddr, host->bounce_buf, host->bounce_sg.length); |
| 399 | tmio_mmc_kunmap_atomic(host->sg_orig, &flags, sg_vaddr); |
| 400 | } |
| 401 | } |
| 402 | |
| 403 | /* needs to be called with host->lock held */ |
| 404 | void tmio_mmc_do_data_irq(struct tmio_mmc_host *host) |
| 405 | { |
| 406 | struct mmc_data *data = host->data; |
| 407 | struct mmc_command *stop; |
| 408 | |
| 409 | host->data = NULL; |
| 410 | |
| 411 | if (!data) { |
| 412 | dev_warn(&host->pdev->dev, "Spurious data end IRQ\n"); |
| 413 | return; |
| 414 | } |
| 415 | stop = data->stop; |
| 416 | |
| 417 | /* FIXME - return correct transfer count on errors */ |
| 418 | if (!data->error) |
| 419 | data->bytes_xfered = data->blocks * data->blksz; |
| 420 | else |
| 421 | data->bytes_xfered = 0; |
| 422 | |
| 423 | pr_debug("Completed data request\n"); |
| 424 | |
| 425 | /* |
| 426 | * FIXME: other drivers allow an optional stop command of any given type |
| 427 | * which we dont do, as the chip can auto generate them. |
| 428 | * Perhaps we can be smarter about when to use auto CMD12 and |
| 429 | * only issue the auto request when we know this is the desired |
| 430 | * stop command, allowing fallback to the stop command the |
| 431 | * upper layers expect. For now, we do what works. |
| 432 | */ |
| 433 | |
| 434 | if (data->flags & MMC_DATA_READ) { |
| 435 | if (host->chan_rx && !host->force_pio) |
| 436 | tmio_mmc_check_bounce_buffer(host); |
| 437 | dev_dbg(&host->pdev->dev, "Complete Rx request %p\n", |
| 438 | host->mrq); |
| 439 | } else { |
| 440 | dev_dbg(&host->pdev->dev, "Complete Tx request %p\n", |
| 441 | host->mrq); |
| 442 | } |
| 443 | |
| 444 | if (stop) { |
| 445 | if (stop->opcode == 12 && !stop->arg) |
| 446 | sd_ctrl_write16(host, CTL_STOP_INTERNAL_ACTION, 0x000); |
| 447 | else |
| 448 | BUG(); |
| 449 | } |
| 450 | |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 451 | schedule_work(&host->done); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 452 | } |
| 453 | |
| 454 | static void tmio_mmc_data_irq(struct tmio_mmc_host *host) |
| 455 | { |
| 456 | struct mmc_data *data; |
| 457 | spin_lock(&host->lock); |
| 458 | data = host->data; |
| 459 | |
| 460 | if (!data) |
| 461 | goto out; |
| 462 | |
| 463 | if (host->chan_tx && (data->flags & MMC_DATA_WRITE) && !host->force_pio) { |
| 464 | /* |
| 465 | * Has all data been written out yet? Testing on SuperH showed, |
| 466 | * that in most cases the first interrupt comes already with the |
| 467 | * BUSY status bit clear, but on some operations, like mount or |
| 468 | * in the beginning of a write / sync / umount, there is one |
| 469 | * DATAEND interrupt with the BUSY bit set, in this cases |
| 470 | * waiting for one more interrupt fixes the problem. |
| 471 | */ |
| 472 | if (!(sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_CMD_BUSY)) { |
| 473 | tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); |
| 474 | tasklet_schedule(&host->dma_complete); |
| 475 | } |
| 476 | } else if (host->chan_rx && (data->flags & MMC_DATA_READ) && !host->force_pio) { |
| 477 | tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_DATAEND); |
| 478 | tasklet_schedule(&host->dma_complete); |
| 479 | } else { |
| 480 | tmio_mmc_do_data_irq(host); |
| 481 | tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_READOP | TMIO_MASK_WRITEOP); |
| 482 | } |
| 483 | out: |
| 484 | spin_unlock(&host->lock); |
| 485 | } |
| 486 | |
| 487 | static void tmio_mmc_cmd_irq(struct tmio_mmc_host *host, |
| 488 | unsigned int stat) |
| 489 | { |
| 490 | struct mmc_command *cmd = host->cmd; |
| 491 | int i, addr; |
| 492 | |
| 493 | spin_lock(&host->lock); |
| 494 | |
| 495 | if (!host->cmd) { |
| 496 | pr_debug("Spurious CMD irq\n"); |
| 497 | goto out; |
| 498 | } |
| 499 | |
| 500 | host->cmd = NULL; |
| 501 | |
| 502 | /* This controller is sicker than the PXA one. Not only do we need to |
| 503 | * drop the top 8 bits of the first response word, we also need to |
| 504 | * modify the order of the response for short response command types. |
| 505 | */ |
| 506 | |
| 507 | for (i = 3, addr = CTL_RESPONSE ; i >= 0 ; i--, addr += 4) |
| 508 | cmd->resp[i] = sd_ctrl_read32(host, addr); |
| 509 | |
| 510 | if (cmd->flags & MMC_RSP_136) { |
| 511 | cmd->resp[0] = (cmd->resp[0] << 8) | (cmd->resp[1] >> 24); |
| 512 | cmd->resp[1] = (cmd->resp[1] << 8) | (cmd->resp[2] >> 24); |
| 513 | cmd->resp[2] = (cmd->resp[2] << 8) | (cmd->resp[3] >> 24); |
| 514 | cmd->resp[3] <<= 8; |
| 515 | } else if (cmd->flags & MMC_RSP_R3) { |
| 516 | cmd->resp[0] = cmd->resp[3]; |
| 517 | } |
| 518 | |
| 519 | if (stat & TMIO_STAT_CMDTIMEOUT) |
| 520 | cmd->error = -ETIMEDOUT; |
| 521 | else if (stat & TMIO_STAT_CRCFAIL && cmd->flags & MMC_RSP_CRC) |
| 522 | cmd->error = -EILSEQ; |
| 523 | |
| 524 | /* If there is data to handle we enable data IRQs here, and |
| 525 | * we will ultimatley finish the request in the data_end handler. |
| 526 | * If theres no data or we encountered an error, finish now. |
| 527 | */ |
| 528 | if (host->data && !cmd->error) { |
| 529 | if (host->data->flags & MMC_DATA_READ) { |
| 530 | if (host->force_pio || !host->chan_rx) |
| 531 | tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_READOP); |
| 532 | else |
| 533 | tasklet_schedule(&host->dma_issue); |
| 534 | } else { |
| 535 | if (host->force_pio || !host->chan_tx) |
| 536 | tmio_mmc_enable_mmc_irqs(host, TMIO_MASK_WRITEOP); |
| 537 | else |
| 538 | tasklet_schedule(&host->dma_issue); |
| 539 | } |
| 540 | } else { |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 541 | schedule_work(&host->done); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | out: |
| 545 | spin_unlock(&host->lock); |
| 546 | } |
| 547 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 548 | static void tmio_mmc_card_irq_status(struct tmio_mmc_host *host, |
| 549 | int *ireg, int *status) |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 550 | { |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 551 | *status = sd_ctrl_read32(host, CTL_STATUS); |
| 552 | *ireg = *status & TMIO_MASK_IRQ & ~host->sdcard_irq_mask; |
| 553 | |
| 554 | pr_debug_status(*status); |
| 555 | pr_debug_status(*ireg); |
| 556 | } |
| 557 | |
| 558 | static bool __tmio_mmc_card_detect_irq(struct tmio_mmc_host *host, |
| 559 | int ireg, int status) |
| 560 | { |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 561 | struct mmc_host *mmc = host->mmc; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 562 | |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 563 | /* Card insert / remove attempts */ |
| 564 | if (ireg & (TMIO_STAT_CARD_INSERT | TMIO_STAT_CARD_REMOVE)) { |
| 565 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_CARD_INSERT | |
| 566 | TMIO_STAT_CARD_REMOVE); |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 567 | if ((((ireg & TMIO_STAT_CARD_REMOVE) && mmc->card) || |
| 568 | ((ireg & TMIO_STAT_CARD_INSERT) && !mmc->card)) && |
| 569 | !work_pending(&mmc->detect.work)) |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 570 | mmc_detect_change(host->mmc, msecs_to_jiffies(100)); |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 571 | return true; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 572 | } |
| 573 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 574 | return false; |
| 575 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 576 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 577 | irqreturn_t tmio_mmc_card_detect_irq(int irq, void *devid) |
| 578 | { |
| 579 | unsigned int ireg, status; |
| 580 | struct tmio_mmc_host *host = devid; |
| 581 | |
| 582 | tmio_mmc_card_irq_status(host, &ireg, &status); |
| 583 | __tmio_mmc_card_detect_irq(host, ireg, status); |
| 584 | |
| 585 | return IRQ_HANDLED; |
| 586 | } |
| 587 | EXPORT_SYMBOL(tmio_mmc_card_detect_irq); |
| 588 | |
| 589 | static bool __tmio_mmc_sdcard_irq(struct tmio_mmc_host *host, |
| 590 | int ireg, int status) |
| 591 | { |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 592 | /* Command completion */ |
| 593 | if (ireg & (TMIO_STAT_CMDRESPEND | TMIO_STAT_CMDTIMEOUT)) { |
| 594 | tmio_mmc_ack_mmc_irqs(host, |
| 595 | TMIO_STAT_CMDRESPEND | |
| 596 | TMIO_STAT_CMDTIMEOUT); |
| 597 | tmio_mmc_cmd_irq(host, status); |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 598 | return true; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 599 | } |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 600 | |
| 601 | /* Data transfer */ |
| 602 | if (ireg & (TMIO_STAT_RXRDY | TMIO_STAT_TXRQ)) { |
| 603 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_RXRDY | TMIO_STAT_TXRQ); |
| 604 | tmio_mmc_pio_irq(host); |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 605 | return true; |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 606 | } |
| 607 | |
| 608 | /* Data transfer completion */ |
| 609 | if (ireg & TMIO_STAT_DATAEND) { |
| 610 | tmio_mmc_ack_mmc_irqs(host, TMIO_STAT_DATAEND); |
| 611 | tmio_mmc_data_irq(host); |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 612 | return true; |
Paul Parsons | e312eb1 | 2011-05-15 13:24:41 +0000 | [diff] [blame] | 613 | } |
| 614 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 615 | return false; |
| 616 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 617 | |
Simon Horman | 7729c7a | 2011-08-25 10:27:26 +0900 | [diff] [blame^] | 618 | irqreturn_t tmio_mmc_sdcard_irq(int irq, void *devid) |
| 619 | { |
| 620 | unsigned int ireg, status; |
| 621 | struct tmio_mmc_host *host = devid; |
| 622 | |
| 623 | tmio_mmc_card_irq_status(host, &ireg, &status); |
| 624 | __tmio_mmc_sdcard_irq(host, ireg, status); |
| 625 | |
| 626 | return IRQ_HANDLED; |
| 627 | } |
| 628 | EXPORT_SYMBOL(tmio_mmc_sdcard_irq); |
| 629 | |
| 630 | irqreturn_t tmio_mmc_sdio_irq(int irq, void *devid) |
| 631 | { |
| 632 | struct tmio_mmc_host *host = devid; |
| 633 | struct mmc_host *mmc = host->mmc; |
| 634 | struct tmio_mmc_data *pdata = host->pdata; |
| 635 | unsigned int ireg, status; |
| 636 | |
| 637 | if (!(pdata->flags & TMIO_MMC_SDIO_IRQ)) |
| 638 | return IRQ_HANDLED; |
| 639 | |
| 640 | status = sd_ctrl_read16(host, CTL_SDIO_STATUS); |
| 641 | ireg = status & TMIO_SDIO_MASK_ALL & ~host->sdcard_irq_mask; |
| 642 | |
| 643 | sd_ctrl_write16(host, CTL_SDIO_STATUS, status & ~TMIO_SDIO_MASK_ALL); |
| 644 | |
| 645 | if (mmc->caps & MMC_CAP_SDIO_IRQ && ireg & TMIO_SDIO_STAT_IOIRQ) |
| 646 | mmc_signal_sdio_irq(mmc); |
| 647 | |
| 648 | return IRQ_HANDLED; |
| 649 | } |
| 650 | EXPORT_SYMBOL(tmio_mmc_sdio_irq); |
| 651 | |
| 652 | irqreturn_t tmio_mmc_irq(int irq, void *devid) |
| 653 | { |
| 654 | struct tmio_mmc_host *host = devid; |
| 655 | unsigned int ireg, status; |
| 656 | |
| 657 | pr_debug("MMC IRQ begin\n"); |
| 658 | |
| 659 | tmio_mmc_card_irq_status(host, &ireg, &status); |
| 660 | if (__tmio_mmc_card_detect_irq(host, ireg, status)) |
| 661 | return IRQ_HANDLED; |
| 662 | if (__tmio_mmc_sdcard_irq(host, ireg, status)) |
| 663 | return IRQ_HANDLED; |
| 664 | |
| 665 | tmio_mmc_sdio_irq(irq, devid); |
| 666 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 667 | return IRQ_HANDLED; |
| 668 | } |
Magnus Damm | 8e7bfdb | 2011-05-06 11:02:33 +0000 | [diff] [blame] | 669 | EXPORT_SYMBOL(tmio_mmc_irq); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 670 | |
| 671 | static int tmio_mmc_start_data(struct tmio_mmc_host *host, |
| 672 | struct mmc_data *data) |
| 673 | { |
| 674 | struct tmio_mmc_data *pdata = host->pdata; |
| 675 | |
| 676 | pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n", |
| 677 | data->blksz, data->blocks); |
| 678 | |
| 679 | /* Some hardware cannot perform 2 byte requests in 4 bit mode */ |
| 680 | if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) { |
| 681 | int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES; |
| 682 | |
| 683 | if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) { |
| 684 | pr_err("%s: %d byte block unsupported in 4 bit mode\n", |
| 685 | mmc_hostname(host->mmc), data->blksz); |
| 686 | return -EINVAL; |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | tmio_mmc_init_sg(host, data); |
| 691 | host->data = data; |
| 692 | |
| 693 | /* Set transfer length / blocksize */ |
| 694 | sd_ctrl_write16(host, CTL_SD_XFER_LEN, data->blksz); |
| 695 | sd_ctrl_write16(host, CTL_XFER_BLK_COUNT, data->blocks); |
| 696 | |
| 697 | tmio_mmc_start_dma(host, data); |
| 698 | |
| 699 | return 0; |
| 700 | } |
| 701 | |
| 702 | /* Process requests from the MMC layer */ |
| 703 | static void tmio_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq) |
| 704 | { |
| 705 | struct tmio_mmc_host *host = mmc_priv(mmc); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 706 | unsigned long flags; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 707 | int ret; |
| 708 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 709 | spin_lock_irqsave(&host->lock, flags); |
| 710 | |
| 711 | if (host->mrq) { |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 712 | pr_debug("request not null\n"); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 713 | if (IS_ERR(host->mrq)) { |
| 714 | spin_unlock_irqrestore(&host->lock, flags); |
| 715 | mrq->cmd->error = -EAGAIN; |
| 716 | mmc_request_done(mmc, mrq); |
| 717 | return; |
| 718 | } |
| 719 | } |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 720 | |
| 721 | host->last_req_ts = jiffies; |
| 722 | wmb(); |
| 723 | host->mrq = mrq; |
| 724 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 725 | spin_unlock_irqrestore(&host->lock, flags); |
| 726 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 727 | if (mrq->data) { |
| 728 | ret = tmio_mmc_start_data(host, mrq->data); |
| 729 | if (ret) |
| 730 | goto fail; |
| 731 | } |
| 732 | |
| 733 | ret = tmio_mmc_start_command(host, mrq->cmd); |
| 734 | if (!ret) { |
| 735 | schedule_delayed_work(&host->delayed_reset_work, |
| 736 | msecs_to_jiffies(2000)); |
| 737 | return; |
| 738 | } |
| 739 | |
| 740 | fail: |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 741 | host->force_pio = false; |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 742 | host->mrq = NULL; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 743 | mrq->cmd->error = ret; |
| 744 | mmc_request_done(mmc, mrq); |
| 745 | } |
| 746 | |
| 747 | /* Set MMC clock / power. |
| 748 | * Note: This controller uses a simple divider scheme therefore it cannot |
| 749 | * run a MMC card at full speed (20MHz). The max clock is 24MHz on SD, but as |
| 750 | * MMC wont run that fast, it has to be clocked at 12MHz which is the next |
| 751 | * slowest setting. |
| 752 | */ |
| 753 | static void tmio_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
| 754 | { |
| 755 | struct tmio_mmc_host *host = mmc_priv(mmc); |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 756 | struct tmio_mmc_data *pdata = host->pdata; |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 757 | unsigned long flags; |
| 758 | |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 759 | mutex_lock(&host->ios_lock); |
| 760 | |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 761 | spin_lock_irqsave(&host->lock, flags); |
| 762 | if (host->mrq) { |
| 763 | if (IS_ERR(host->mrq)) { |
| 764 | dev_dbg(&host->pdev->dev, |
| 765 | "%s.%d: concurrent .set_ios(), clk %u, mode %u\n", |
| 766 | current->comm, task_pid_nr(current), |
| 767 | ios->clock, ios->power_mode); |
| 768 | host->mrq = ERR_PTR(-EINTR); |
| 769 | } else { |
| 770 | dev_dbg(&host->pdev->dev, |
| 771 | "%s.%d: CMD%u active since %lu, now %lu!\n", |
| 772 | current->comm, task_pid_nr(current), |
| 773 | host->mrq->cmd->opcode, host->last_req_ts, jiffies); |
| 774 | } |
| 775 | spin_unlock_irqrestore(&host->lock, flags); |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 776 | |
| 777 | mutex_unlock(&host->ios_lock); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 778 | return; |
| 779 | } |
| 780 | |
| 781 | host->mrq = ERR_PTR(-EBUSY); |
| 782 | |
| 783 | spin_unlock_irqrestore(&host->lock, flags); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 784 | |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 785 | /* |
| 786 | * pdata->power == false only if COLD_CD is available, otherwise only |
| 787 | * in short time intervals during probing or resuming |
| 788 | */ |
| 789 | if (ios->power_mode == MMC_POWER_ON && ios->clock) { |
| 790 | if (!pdata->power) { |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 791 | pm_runtime_get_sync(&host->pdev->dev); |
| 792 | pdata->power = true; |
| 793 | } |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 794 | tmio_mmc_set_clock(host, ios->clock); |
Guennadi Liakhovetski | c919c2a | 2011-04-21 09:09:59 +0200 | [diff] [blame] | 795 | /* power up SD bus */ |
| 796 | if (host->set_pwr) |
| 797 | host->set_pwr(host->pdev, 1); |
Guennadi Liakhovetski | 5fd0157 | 2011-03-09 14:45:44 +0100 | [diff] [blame] | 798 | /* start bus clock */ |
| 799 | tmio_mmc_clk_start(host); |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 800 | } else if (ios->power_mode != MMC_POWER_UP) { |
| 801 | if (host->set_pwr) |
| 802 | host->set_pwr(host->pdev, 0); |
| 803 | if ((pdata->flags & TMIO_MMC_HAS_COLD_CD) && |
| 804 | pdata->power) { |
| 805 | pdata->power = false; |
| 806 | pm_runtime_put(&host->pdev->dev); |
| 807 | } |
| 808 | tmio_mmc_clk_stop(host); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 809 | } |
| 810 | |
| 811 | switch (ios->bus_width) { |
| 812 | case MMC_BUS_WIDTH_1: |
| 813 | sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x80e0); |
| 814 | break; |
| 815 | case MMC_BUS_WIDTH_4: |
| 816 | sd_ctrl_write16(host, CTL_SD_MEM_CARD_OPT, 0x00e0); |
| 817 | break; |
| 818 | } |
| 819 | |
| 820 | /* Let things settle. delay taken from winCE driver */ |
| 821 | udelay(140); |
Guennadi Liakhovetski | df3ef2d | 2011-04-21 07:20:16 +0000 | [diff] [blame] | 822 | if (PTR_ERR(host->mrq) == -EINTR) |
| 823 | dev_dbg(&host->pdev->dev, |
| 824 | "%s.%d: IOS interrupted: clk %u, mode %u", |
| 825 | current->comm, task_pid_nr(current), |
| 826 | ios->clock, ios->power_mode); |
| 827 | host->mrq = NULL; |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 828 | |
| 829 | mutex_unlock(&host->ios_lock); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 830 | } |
| 831 | |
| 832 | static int tmio_mmc_get_ro(struct mmc_host *mmc) |
| 833 | { |
| 834 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 835 | struct tmio_mmc_data *pdata = host->pdata; |
| 836 | |
Guennadi Liakhovetski | 7d8b4c2 | 2011-06-20 16:51:10 +0200 | [diff] [blame] | 837 | return !((pdata->flags & TMIO_MMC_WRPROTECT_DISABLE) || |
| 838 | (sd_ctrl_read32(host, CTL_STATUS) & TMIO_STAT_WRPROTECT)); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 839 | } |
| 840 | |
| 841 | static int tmio_mmc_get_cd(struct mmc_host *mmc) |
| 842 | { |
| 843 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 844 | struct tmio_mmc_data *pdata = host->pdata; |
| 845 | |
| 846 | if (!pdata->get_cd) |
| 847 | return -ENOSYS; |
| 848 | else |
| 849 | return pdata->get_cd(host->pdev); |
| 850 | } |
| 851 | |
| 852 | static const struct mmc_host_ops tmio_mmc_ops = { |
| 853 | .request = tmio_mmc_request, |
| 854 | .set_ios = tmio_mmc_set_ios, |
| 855 | .get_ro = tmio_mmc_get_ro, |
| 856 | .get_cd = tmio_mmc_get_cd, |
| 857 | .enable_sdio_irq = tmio_mmc_enable_sdio_irq, |
| 858 | }; |
| 859 | |
| 860 | int __devinit tmio_mmc_host_probe(struct tmio_mmc_host **host, |
| 861 | struct platform_device *pdev, |
| 862 | struct tmio_mmc_data *pdata) |
| 863 | { |
| 864 | struct tmio_mmc_host *_host; |
| 865 | struct mmc_host *mmc; |
| 866 | struct resource *res_ctl; |
| 867 | int ret; |
| 868 | u32 irq_mask = TMIO_MASK_CMD; |
| 869 | |
| 870 | res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 871 | if (!res_ctl) |
| 872 | return -EINVAL; |
| 873 | |
| 874 | mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev); |
| 875 | if (!mmc) |
| 876 | return -ENOMEM; |
| 877 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 878 | pdata->dev = &pdev->dev; |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 879 | _host = mmc_priv(mmc); |
| 880 | _host->pdata = pdata; |
| 881 | _host->mmc = mmc; |
| 882 | _host->pdev = pdev; |
| 883 | platform_set_drvdata(pdev, mmc); |
| 884 | |
| 885 | _host->set_pwr = pdata->set_pwr; |
| 886 | _host->set_clk_div = pdata->set_clk_div; |
| 887 | |
| 888 | /* SD control register space size is 0x200, 0x400 for bus_shift=1 */ |
| 889 | _host->bus_shift = resource_size(res_ctl) >> 10; |
| 890 | |
| 891 | _host->ctl = ioremap(res_ctl->start, resource_size(res_ctl)); |
| 892 | if (!_host->ctl) { |
| 893 | ret = -ENOMEM; |
| 894 | goto host_free; |
| 895 | } |
| 896 | |
| 897 | mmc->ops = &tmio_mmc_ops; |
| 898 | mmc->caps = MMC_CAP_4_BIT_DATA | pdata->capabilities; |
| 899 | mmc->f_max = pdata->hclk; |
| 900 | mmc->f_min = mmc->f_max / 512; |
| 901 | mmc->max_segs = 32; |
| 902 | mmc->max_blk_size = 512; |
| 903 | mmc->max_blk_count = (PAGE_CACHE_SIZE / mmc->max_blk_size) * |
| 904 | mmc->max_segs; |
| 905 | mmc->max_req_size = mmc->max_blk_size * mmc->max_blk_count; |
| 906 | mmc->max_seg_size = mmc->max_req_size; |
| 907 | if (pdata->ocr_mask) |
| 908 | mmc->ocr_avail = pdata->ocr_mask; |
| 909 | else |
| 910 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; |
| 911 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 912 | pdata->power = false; |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 913 | pm_runtime_enable(&pdev->dev); |
| 914 | ret = pm_runtime_resume(&pdev->dev); |
| 915 | if (ret < 0) |
| 916 | goto pm_disable; |
| 917 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 918 | tmio_mmc_clk_stop(_host); |
| 919 | tmio_mmc_reset(_host); |
| 920 | |
Simon Horman | 54680fe | 2011-08-25 10:27:25 +0900 | [diff] [blame] | 921 | _host->sdcard_irq_mask = sd_ctrl_read32(_host, CTL_IRQ_MASK); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 922 | tmio_mmc_disable_mmc_irqs(_host, TMIO_MASK_ALL); |
| 923 | if (pdata->flags & TMIO_MMC_SDIO_IRQ) |
| 924 | tmio_mmc_enable_sdio_irq(mmc, 0); |
| 925 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 926 | spin_lock_init(&_host->lock); |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 927 | mutex_init(&_host->ios_lock); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 928 | |
| 929 | /* Init delayed work for request timeouts */ |
| 930 | INIT_DELAYED_WORK(&_host->delayed_reset_work, tmio_mmc_reset_work); |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 931 | INIT_WORK(&_host->done, tmio_mmc_done_work); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 932 | |
| 933 | /* See if we also get DMA */ |
| 934 | tmio_mmc_request_dma(_host, pdata); |
| 935 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 936 | /* We have to keep the device powered for its card detection to work */ |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 937 | if (!(pdata->flags & TMIO_MMC_HAS_COLD_CD)) { |
| 938 | pdata->power = true; |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 939 | pm_runtime_get_noresume(&pdev->dev); |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 940 | } |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 941 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 942 | mmc_add_host(mmc); |
| 943 | |
| 944 | /* Unmask the IRQs we want to know about */ |
| 945 | if (!_host->chan_rx) |
| 946 | irq_mask |= TMIO_MASK_READOP; |
| 947 | if (!_host->chan_tx) |
| 948 | irq_mask |= TMIO_MASK_WRITEOP; |
| 949 | |
| 950 | tmio_mmc_enable_mmc_irqs(_host, irq_mask); |
| 951 | |
| 952 | *host = _host; |
| 953 | |
| 954 | return 0; |
| 955 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 956 | pm_disable: |
| 957 | pm_runtime_disable(&pdev->dev); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 958 | iounmap(_host->ctl); |
| 959 | host_free: |
| 960 | mmc_free_host(mmc); |
| 961 | |
| 962 | return ret; |
| 963 | } |
| 964 | EXPORT_SYMBOL(tmio_mmc_host_probe); |
| 965 | |
| 966 | void tmio_mmc_host_remove(struct tmio_mmc_host *host) |
| 967 | { |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 968 | struct platform_device *pdev = host->pdev; |
| 969 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 970 | /* |
| 971 | * We don't have to manipulate pdata->power here: if there is a card in |
| 972 | * the slot, the runtime PM is active and our .runtime_resume() will not |
| 973 | * be run. If there is no card in the slot and the platform can suspend |
| 974 | * the controller, the runtime PM is suspended and pdata->power == false, |
| 975 | * so, our .runtime_resume() will not try to detect a card in the slot. |
| 976 | */ |
| 977 | if (host->pdata->flags & TMIO_MMC_HAS_COLD_CD) |
| 978 | pm_runtime_get_sync(&pdev->dev); |
| 979 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 980 | mmc_remove_host(host->mmc); |
Guennadi Liakhovetski | b9269fd | 2011-07-14 12:12:38 +0200 | [diff] [blame] | 981 | cancel_work_sync(&host->done); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 982 | cancel_delayed_work_sync(&host->delayed_reset_work); |
| 983 | tmio_mmc_release_dma(host); |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 984 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 985 | pm_runtime_put_sync(&pdev->dev); |
| 986 | pm_runtime_disable(&pdev->dev); |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 987 | |
| 988 | iounmap(host->ctl); |
| 989 | mmc_free_host(host->mmc); |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 990 | } |
| 991 | EXPORT_SYMBOL(tmio_mmc_host_remove); |
| 992 | |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 993 | #ifdef CONFIG_PM |
| 994 | int tmio_mmc_host_suspend(struct device *dev) |
| 995 | { |
| 996 | struct mmc_host *mmc = dev_get_drvdata(dev); |
| 997 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 998 | int ret = mmc_suspend_host(mmc); |
| 999 | |
| 1000 | if (!ret) |
| 1001 | tmio_mmc_disable_mmc_irqs(host, TMIO_MASK_ALL); |
| 1002 | |
| 1003 | host->pm_error = pm_runtime_put_sync(dev); |
| 1004 | |
| 1005 | return ret; |
| 1006 | } |
| 1007 | EXPORT_SYMBOL(tmio_mmc_host_suspend); |
| 1008 | |
| 1009 | int tmio_mmc_host_resume(struct device *dev) |
| 1010 | { |
| 1011 | struct mmc_host *mmc = dev_get_drvdata(dev); |
| 1012 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 1013 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1014 | /* The MMC core will perform the complete set up */ |
| 1015 | host->pdata->power = false; |
| 1016 | |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 1017 | host->pm_global = true; |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1018 | if (!host->pm_error) |
| 1019 | pm_runtime_get_sync(dev); |
| 1020 | |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 1021 | if (host->pm_global) { |
| 1022 | /* Runtime PM resume callback didn't run */ |
| 1023 | tmio_mmc_reset(host); |
Guennadi Liakhovetski | 162f43e | 2011-07-14 18:39:10 +0200 | [diff] [blame] | 1024 | tmio_mmc_enable_dma(host, true); |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 1025 | host->pm_global = false; |
| 1026 | } |
Guennadi Liakhovetski | e6ee718 | 2011-05-05 16:13:12 +0000 | [diff] [blame] | 1027 | |
| 1028 | return mmc_resume_host(mmc); |
| 1029 | } |
| 1030 | EXPORT_SYMBOL(tmio_mmc_host_resume); |
| 1031 | |
| 1032 | #endif /* CONFIG_PM */ |
| 1033 | |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1034 | int tmio_mmc_host_runtime_suspend(struct device *dev) |
| 1035 | { |
| 1036 | return 0; |
| 1037 | } |
| 1038 | EXPORT_SYMBOL(tmio_mmc_host_runtime_suspend); |
| 1039 | |
| 1040 | int tmio_mmc_host_runtime_resume(struct device *dev) |
| 1041 | { |
| 1042 | struct mmc_host *mmc = dev_get_drvdata(dev); |
| 1043 | struct tmio_mmc_host *host = mmc_priv(mmc); |
| 1044 | struct tmio_mmc_data *pdata = host->pdata; |
| 1045 | |
| 1046 | tmio_mmc_reset(host); |
Guennadi Liakhovetski | 162f43e | 2011-07-14 18:39:10 +0200 | [diff] [blame] | 1047 | tmio_mmc_enable_dma(host, true); |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1048 | |
| 1049 | if (pdata->power) { |
| 1050 | /* Only entered after a card-insert interrupt */ |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 1051 | if (!mmc->card) |
| 1052 | tmio_mmc_set_ios(mmc, &mmc->ios); |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1053 | mmc_detect_change(mmc, msecs_to_jiffies(100)); |
| 1054 | } |
Guennadi Liakhovetski | 71d111c | 2011-07-14 12:16:59 +0200 | [diff] [blame] | 1055 | host->pm_global = false; |
Guennadi Liakhovetski | 7311bef | 2011-05-11 16:51:11 +0000 | [diff] [blame] | 1056 | |
| 1057 | return 0; |
| 1058 | } |
| 1059 | EXPORT_SYMBOL(tmio_mmc_host_runtime_resume); |
| 1060 | |
Guennadi Liakhovetski | b614749 | 2011-03-23 12:42:44 +0100 | [diff] [blame] | 1061 | MODULE_LICENSE("GPL v2"); |