Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/mmc/s3cmci.h - Samsung S3C MCI driver |
| 3 | * |
| 4 | * Copyright (C) 2004-2006 maintech GmbH, Thomas Kleffel <tk@maintech.de> |
| 5 | * |
ben@fluff.org.uk | 08c55e2 | 2008-10-15 00:17:19 +0100 | [diff] [blame] | 6 | * Current driver maintained by Ben Dooks and Simtec Electronics |
| 7 | * Copyright (C) 2008 Simtec Electronics <ben-linux@fluff.org> |
| 8 | * |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/dma-mapping.h> |
| 16 | #include <linux/clk.h> |
| 17 | #include <linux/mmc/host.h> |
| 18 | #include <linux/platform_device.h> |
ben@fluff.org.uk | f87e6d0 | 2008-10-15 00:17:16 +0100 | [diff] [blame] | 19 | #include <linux/cpufreq.h> |
Ben Dooks | 9bdd203 | 2009-10-01 15:44:17 -0700 | [diff] [blame] | 20 | #include <linux/debugfs.h> |
| 21 | #include <linux/seq_file.h> |
Ben Dooks | ec976d6 | 2009-05-13 22:52:24 +0100 | [diff] [blame] | 22 | #include <linux/gpio.h> |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 23 | #include <linux/irq.h> |
| 24 | #include <linux/io.h> |
| 25 | |
Ramax Lo | 7ad14f8 | 2009-01-14 02:13:47 +0100 | [diff] [blame] | 26 | #include <mach/dma.h> |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 27 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 28 | #include <mach/regs-sdi.h> |
| 29 | #include <mach/regs-gpio.h> |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 30 | |
Ben Dooks | e3bd9ec | 2008-10-30 10:14:39 +0000 | [diff] [blame] | 31 | #include <plat/mci.h> |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 32 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 33 | #include "s3cmci.h" |
| 34 | |
| 35 | #define DRIVER_NAME "s3c-mci" |
| 36 | |
| 37 | enum dbg_channels { |
| 38 | dbg_err = (1 << 0), |
| 39 | dbg_debug = (1 << 1), |
| 40 | dbg_info = (1 << 2), |
| 41 | dbg_irq = (1 << 3), |
| 42 | dbg_sg = (1 << 4), |
| 43 | dbg_dma = (1 << 5), |
| 44 | dbg_pio = (1 << 6), |
| 45 | dbg_fail = (1 << 7), |
| 46 | dbg_conf = (1 << 8), |
| 47 | }; |
| 48 | |
ben@fluff.org.uk | 9c2e7e4 | 2008-10-15 00:17:15 +0100 | [diff] [blame] | 49 | static const int dbgmap_err = dbg_fail; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 50 | static const int dbgmap_info = dbg_info | dbg_conf; |
ben@fluff.org.uk | 9c2e7e4 | 2008-10-15 00:17:15 +0100 | [diff] [blame] | 51 | static const int dbgmap_debug = dbg_err | dbg_debug; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 52 | |
| 53 | #define dbg(host, channels, args...) \ |
| 54 | do { \ |
| 55 | if (dbgmap_err & channels) \ |
| 56 | dev_err(&host->pdev->dev, args); \ |
| 57 | else if (dbgmap_info & channels) \ |
| 58 | dev_info(&host->pdev->dev, args); \ |
| 59 | else if (dbgmap_debug & channels) \ |
| 60 | dev_dbg(&host->pdev->dev, args); \ |
| 61 | } while (0) |
| 62 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 63 | static struct s3c2410_dma_client s3cmci_dma_client = { |
| 64 | .name = "s3c-mci", |
| 65 | }; |
| 66 | |
| 67 | static void finalize_request(struct s3cmci_host *host); |
| 68 | static void s3cmci_send_request(struct mmc_host *mmc); |
| 69 | static void s3cmci_reset(struct s3cmci_host *host); |
| 70 | |
| 71 | #ifdef CONFIG_MMC_DEBUG |
| 72 | |
| 73 | static void dbg_dumpregs(struct s3cmci_host *host, char *prefix) |
| 74 | { |
| 75 | u32 con, pre, cmdarg, cmdcon, cmdsta, r0, r1, r2, r3, timer, bsize; |
| 76 | u32 datcon, datcnt, datsta, fsta, imask; |
| 77 | |
| 78 | con = readl(host->base + S3C2410_SDICON); |
| 79 | pre = readl(host->base + S3C2410_SDIPRE); |
| 80 | cmdarg = readl(host->base + S3C2410_SDICMDARG); |
| 81 | cmdcon = readl(host->base + S3C2410_SDICMDCON); |
| 82 | cmdsta = readl(host->base + S3C2410_SDICMDSTAT); |
| 83 | r0 = readl(host->base + S3C2410_SDIRSP0); |
| 84 | r1 = readl(host->base + S3C2410_SDIRSP1); |
| 85 | r2 = readl(host->base + S3C2410_SDIRSP2); |
| 86 | r3 = readl(host->base + S3C2410_SDIRSP3); |
| 87 | timer = readl(host->base + S3C2410_SDITIMER); |
| 88 | bsize = readl(host->base + S3C2410_SDIBSIZE); |
| 89 | datcon = readl(host->base + S3C2410_SDIDCON); |
| 90 | datcnt = readl(host->base + S3C2410_SDIDCNT); |
| 91 | datsta = readl(host->base + S3C2410_SDIDSTA); |
| 92 | fsta = readl(host->base + S3C2410_SDIFSTA); |
| 93 | imask = readl(host->base + host->sdiimsk); |
| 94 | |
| 95 | dbg(host, dbg_debug, "%s CON:[%08x] PRE:[%08x] TMR:[%08x]\n", |
| 96 | prefix, con, pre, timer); |
| 97 | |
| 98 | dbg(host, dbg_debug, "%s CCON:[%08x] CARG:[%08x] CSTA:[%08x]\n", |
| 99 | prefix, cmdcon, cmdarg, cmdsta); |
| 100 | |
| 101 | dbg(host, dbg_debug, "%s DCON:[%08x] FSTA:[%08x]" |
| 102 | " DSTA:[%08x] DCNT:[%08x]\n", |
| 103 | prefix, datcon, fsta, datsta, datcnt); |
| 104 | |
| 105 | dbg(host, dbg_debug, "%s R0:[%08x] R1:[%08x]" |
| 106 | " R2:[%08x] R3:[%08x]\n", |
| 107 | prefix, r0, r1, r2, r3); |
| 108 | } |
| 109 | |
| 110 | static void prepare_dbgmsg(struct s3cmci_host *host, struct mmc_command *cmd, |
| 111 | int stop) |
| 112 | { |
| 113 | snprintf(host->dbgmsg_cmd, 300, |
| 114 | "#%u%s op:%i arg:0x%08x flags:0x08%x retries:%u", |
| 115 | host->ccnt, (stop ? " (STOP)" : ""), |
| 116 | cmd->opcode, cmd->arg, cmd->flags, cmd->retries); |
| 117 | |
| 118 | if (cmd->data) { |
| 119 | snprintf(host->dbgmsg_dat, 300, |
| 120 | "#%u bsize:%u blocks:%u bytes:%u", |
| 121 | host->dcnt, cmd->data->blksz, |
| 122 | cmd->data->blocks, |
| 123 | cmd->data->blocks * cmd->data->blksz); |
| 124 | } else { |
| 125 | host->dbgmsg_dat[0] = '\0'; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | static void dbg_dumpcmd(struct s3cmci_host *host, struct mmc_command *cmd, |
| 130 | int fail) |
| 131 | { |
| 132 | unsigned int dbglvl = fail ? dbg_fail : dbg_debug; |
| 133 | |
| 134 | if (!cmd) |
| 135 | return; |
| 136 | |
| 137 | if (cmd->error == 0) { |
| 138 | dbg(host, dbglvl, "CMD[OK] %s R0:0x%08x\n", |
| 139 | host->dbgmsg_cmd, cmd->resp[0]); |
| 140 | } else { |
| 141 | dbg(host, dbglvl, "CMD[ERR %i] %s Status:%s\n", |
| 142 | cmd->error, host->dbgmsg_cmd, host->status); |
| 143 | } |
| 144 | |
| 145 | if (!cmd->data) |
| 146 | return; |
| 147 | |
| 148 | if (cmd->data->error == 0) { |
| 149 | dbg(host, dbglvl, "DAT[OK] %s\n", host->dbgmsg_dat); |
| 150 | } else { |
| 151 | dbg(host, dbglvl, "DAT[ERR %i] %s DCNT:0x%08x\n", |
| 152 | cmd->data->error, host->dbgmsg_dat, |
| 153 | readl(host->base + S3C2410_SDIDCNT)); |
| 154 | } |
| 155 | } |
| 156 | #else |
| 157 | static void dbg_dumpcmd(struct s3cmci_host *host, |
| 158 | struct mmc_command *cmd, int fail) { } |
| 159 | |
| 160 | static void prepare_dbgmsg(struct s3cmci_host *host, struct mmc_command *cmd, |
| 161 | int stop) { } |
| 162 | |
| 163 | static void dbg_dumpregs(struct s3cmci_host *host, char *prefix) { } |
| 164 | |
| 165 | #endif /* CONFIG_MMC_DEBUG */ |
| 166 | |
Ben Dooks | 26f1494 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 167 | /** |
| 168 | * s3cmci_host_usedma - return whether the host is using dma or pio |
| 169 | * @host: The host state |
| 170 | * |
| 171 | * Return true if the host is using DMA to transfer data, else false |
| 172 | * to use PIO mode. Will return static data depending on the driver |
| 173 | * configuration. |
| 174 | */ |
| 175 | static inline bool s3cmci_host_usedma(struct s3cmci_host *host) |
| 176 | { |
| 177 | #ifdef CONFIG_MMC_S3C_PIO |
| 178 | return false; |
| 179 | #elif defined(CONFIG_MMC_S3C_DMA) |
| 180 | return true; |
| 181 | #else |
| 182 | return host->dodma; |
| 183 | #endif |
| 184 | } |
| 185 | |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 186 | /** |
| 187 | * s3cmci_host_canpio - return true if host has pio code available |
| 188 | * |
| 189 | * Return true if the driver has been compiled with the PIO support code |
| 190 | * available. |
| 191 | */ |
| 192 | static inline bool s3cmci_host_canpio(void) |
| 193 | { |
| 194 | #ifdef CONFIG_MMC_S3C_PIO |
| 195 | return true; |
| 196 | #else |
| 197 | return false; |
| 198 | #endif |
| 199 | } |
| 200 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 201 | static inline u32 enable_imask(struct s3cmci_host *host, u32 imask) |
| 202 | { |
| 203 | u32 newmask; |
| 204 | |
| 205 | newmask = readl(host->base + host->sdiimsk); |
| 206 | newmask |= imask; |
| 207 | |
| 208 | writel(newmask, host->base + host->sdiimsk); |
| 209 | |
| 210 | return newmask; |
| 211 | } |
| 212 | |
| 213 | static inline u32 disable_imask(struct s3cmci_host *host, u32 imask) |
| 214 | { |
| 215 | u32 newmask; |
| 216 | |
| 217 | newmask = readl(host->base + host->sdiimsk); |
| 218 | newmask &= ~imask; |
| 219 | |
| 220 | writel(newmask, host->base + host->sdiimsk); |
| 221 | |
| 222 | return newmask; |
| 223 | } |
| 224 | |
| 225 | static inline void clear_imask(struct s3cmci_host *host) |
| 226 | { |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 227 | u32 mask = readl(host->base + host->sdiimsk); |
| 228 | |
| 229 | /* preserve the SDIO IRQ mask state */ |
| 230 | mask &= S3C2410_SDIIMSK_SDIOIRQ; |
| 231 | writel(mask, host->base + host->sdiimsk); |
| 232 | } |
| 233 | |
| 234 | /** |
| 235 | * s3cmci_check_sdio_irq - test whether the SDIO IRQ is being signalled |
| 236 | * @host: The host to check. |
| 237 | * |
| 238 | * Test to see if the SDIO interrupt is being signalled in case the |
| 239 | * controller has failed to re-detect a card interrupt. Read GPE8 and |
| 240 | * see if it is low and if so, signal a SDIO interrupt. |
| 241 | * |
| 242 | * This is currently called if a request is finished (we assume that the |
| 243 | * bus is now idle) and when the SDIO IRQ is enabled in case the IRQ is |
| 244 | * already being indicated. |
| 245 | */ |
| 246 | static void s3cmci_check_sdio_irq(struct s3cmci_host *host) |
| 247 | { |
| 248 | if (host->sdio_irqen) { |
| 249 | if (gpio_get_value(S3C2410_GPE(8)) == 0) { |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 250 | pr_debug("%s: signalling irq\n", __func__); |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 251 | mmc_signal_sdio_irq(host->mmc); |
| 252 | } |
| 253 | } |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | static inline int get_data_buffer(struct s3cmci_host *host, |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 257 | u32 *bytes, u32 **pointer) |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 258 | { |
| 259 | struct scatterlist *sg; |
| 260 | |
| 261 | if (host->pio_active == XFER_NONE) |
| 262 | return -EINVAL; |
| 263 | |
| 264 | if ((!host->mrq) || (!host->mrq->data)) |
| 265 | return -EINVAL; |
| 266 | |
| 267 | if (host->pio_sgptr >= host->mrq->data->sg_len) { |
| 268 | dbg(host, dbg_debug, "no more buffers (%i/%i)\n", |
| 269 | host->pio_sgptr, host->mrq->data->sg_len); |
| 270 | return -EBUSY; |
| 271 | } |
| 272 | sg = &host->mrq->data->sg[host->pio_sgptr]; |
| 273 | |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 274 | *bytes = sg->length; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 275 | *pointer = sg_virt(sg); |
| 276 | |
| 277 | host->pio_sgptr++; |
| 278 | |
| 279 | dbg(host, dbg_sg, "new buffer (%i/%i)\n", |
| 280 | host->pio_sgptr, host->mrq->data->sg_len); |
| 281 | |
| 282 | return 0; |
| 283 | } |
| 284 | |
| 285 | static inline u32 fifo_count(struct s3cmci_host *host) |
| 286 | { |
| 287 | u32 fifostat = readl(host->base + S3C2410_SDIFSTA); |
| 288 | |
| 289 | fifostat &= S3C2410_SDIFSTA_COUNTMASK; |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 290 | return fifostat; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 291 | } |
| 292 | |
| 293 | static inline u32 fifo_free(struct s3cmci_host *host) |
| 294 | { |
| 295 | u32 fifostat = readl(host->base + S3C2410_SDIFSTA); |
| 296 | |
| 297 | fifostat &= S3C2410_SDIFSTA_COUNTMASK; |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 298 | return 63 - fifostat; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 299 | } |
| 300 | |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 301 | /** |
| 302 | * s3cmci_enable_irq - enable IRQ, after having disabled it. |
| 303 | * @host: The device state. |
| 304 | * @more: True if more IRQs are expected from transfer. |
| 305 | * |
| 306 | * Enable the main IRQ if needed after it has been disabled. |
| 307 | * |
| 308 | * The IRQ can be one of the following states: |
| 309 | * - disabled during IDLE |
| 310 | * - disabled whilst processing data |
| 311 | * - enabled during transfer |
| 312 | * - enabled whilst awaiting SDIO interrupt detection |
| 313 | */ |
| 314 | static void s3cmci_enable_irq(struct s3cmci_host *host, bool more) |
| 315 | { |
| 316 | unsigned long flags; |
| 317 | bool enable = false; |
| 318 | |
| 319 | local_irq_save(flags); |
| 320 | |
| 321 | host->irq_enabled = more; |
| 322 | host->irq_disabled = false; |
| 323 | |
| 324 | enable = more | host->sdio_irqen; |
| 325 | |
| 326 | if (host->irq_state != enable) { |
| 327 | host->irq_state = enable; |
| 328 | |
| 329 | if (enable) |
| 330 | enable_irq(host->irq); |
| 331 | else |
| 332 | disable_irq(host->irq); |
| 333 | } |
| 334 | |
| 335 | local_irq_restore(flags); |
| 336 | } |
| 337 | |
| 338 | /** |
| 339 | * |
| 340 | */ |
| 341 | static void s3cmci_disable_irq(struct s3cmci_host *host, bool transfer) |
| 342 | { |
| 343 | unsigned long flags; |
| 344 | |
| 345 | local_irq_save(flags); |
| 346 | |
Girish K S | a3c76eb | 2011-10-11 11:44:09 +0530 | [diff] [blame] | 347 | /* pr_debug("%s: transfer %d\n", __func__, transfer); */ |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 348 | |
| 349 | host->irq_disabled = transfer; |
| 350 | |
| 351 | if (transfer && host->irq_state) { |
| 352 | host->irq_state = false; |
| 353 | disable_irq(host->irq); |
| 354 | } |
| 355 | |
| 356 | local_irq_restore(flags); |
| 357 | } |
| 358 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 359 | static void do_pio_read(struct s3cmci_host *host) |
| 360 | { |
| 361 | int res; |
| 362 | u32 fifo; |
ben@fluff.org.uk | 18280ff | 2008-10-15 00:17:18 +0100 | [diff] [blame] | 363 | u32 *ptr; |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 364 | u32 fifo_words; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 365 | void __iomem *from_ptr; |
| 366 | |
| 367 | /* write real prescaler to host, it might be set slow to fix */ |
| 368 | writel(host->prescaler, host->base + S3C2410_SDIPRE); |
| 369 | |
| 370 | from_ptr = host->base + host->sdidata; |
| 371 | |
| 372 | while ((fifo = fifo_count(host))) { |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 373 | if (!host->pio_bytes) { |
| 374 | res = get_data_buffer(host, &host->pio_bytes, |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 375 | &host->pio_ptr); |
| 376 | if (res) { |
| 377 | host->pio_active = XFER_NONE; |
| 378 | host->complete_what = COMPLETION_FINALIZE; |
| 379 | |
| 380 | dbg(host, dbg_pio, "pio_read(): " |
| 381 | "complete (no more data).\n"); |
| 382 | return; |
| 383 | } |
| 384 | |
| 385 | dbg(host, dbg_pio, |
| 386 | "pio_read(): new target: [%i]@[%p]\n", |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 387 | host->pio_bytes, host->pio_ptr); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | dbg(host, dbg_pio, |
| 391 | "pio_read(): fifo:[%02i] buffer:[%03i] dcnt:[%08X]\n", |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 392 | fifo, host->pio_bytes, |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 393 | readl(host->base + S3C2410_SDIDCNT)); |
| 394 | |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 395 | /* If we have reached the end of the block, we can |
| 396 | * read a word and get 1 to 3 bytes. If we in the |
| 397 | * middle of the block, we have to read full words, |
| 398 | * otherwise we will write garbage, so round down to |
| 399 | * an even multiple of 4. */ |
| 400 | if (fifo >= host->pio_bytes) |
| 401 | fifo = host->pio_bytes; |
| 402 | else |
| 403 | fifo -= fifo & 3; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 404 | |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 405 | host->pio_bytes -= fifo; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 406 | host->pio_count += fifo; |
| 407 | |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 408 | fifo_words = fifo >> 2; |
ben@fluff.org.uk | 18280ff | 2008-10-15 00:17:18 +0100 | [diff] [blame] | 409 | ptr = host->pio_ptr; |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 410 | while (fifo_words--) |
ben@fluff.org.uk | 18280ff | 2008-10-15 00:17:18 +0100 | [diff] [blame] | 411 | *ptr++ = readl(from_ptr); |
| 412 | host->pio_ptr = ptr; |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 413 | |
| 414 | if (fifo & 3) { |
| 415 | u32 n = fifo & 3; |
| 416 | u32 data = readl(from_ptr); |
| 417 | u8 *p = (u8 *)host->pio_ptr; |
| 418 | |
| 419 | while (n--) { |
| 420 | *p++ = data; |
| 421 | data >>= 8; |
| 422 | } |
| 423 | } |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 424 | } |
| 425 | |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 426 | if (!host->pio_bytes) { |
| 427 | res = get_data_buffer(host, &host->pio_bytes, &host->pio_ptr); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 428 | if (res) { |
| 429 | dbg(host, dbg_pio, |
| 430 | "pio_read(): complete (no more buffers).\n"); |
| 431 | host->pio_active = XFER_NONE; |
| 432 | host->complete_what = COMPLETION_FINALIZE; |
| 433 | |
| 434 | return; |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | enable_imask(host, |
| 439 | S3C2410_SDIIMSK_RXFIFOHALF | S3C2410_SDIIMSK_RXFIFOLAST); |
| 440 | } |
| 441 | |
| 442 | static void do_pio_write(struct s3cmci_host *host) |
| 443 | { |
| 444 | void __iomem *to_ptr; |
| 445 | int res; |
| 446 | u32 fifo; |
ben@fluff.org.uk | 18280ff | 2008-10-15 00:17:18 +0100 | [diff] [blame] | 447 | u32 *ptr; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 448 | |
| 449 | to_ptr = host->base + host->sdidata; |
| 450 | |
Yauhen Kharuzhy | 9942448 | 2009-02-11 13:25:52 -0800 | [diff] [blame] | 451 | while ((fifo = fifo_free(host)) > 3) { |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 452 | if (!host->pio_bytes) { |
| 453 | res = get_data_buffer(host, &host->pio_bytes, |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 454 | &host->pio_ptr); |
| 455 | if (res) { |
| 456 | dbg(host, dbg_pio, |
| 457 | "pio_write(): complete (no more data).\n"); |
| 458 | host->pio_active = XFER_NONE; |
| 459 | |
| 460 | return; |
| 461 | } |
| 462 | |
| 463 | dbg(host, dbg_pio, |
| 464 | "pio_write(): new source: [%i]@[%p]\n", |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 465 | host->pio_bytes, host->pio_ptr); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 466 | |
| 467 | } |
| 468 | |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 469 | /* If we have reached the end of the block, we have to |
| 470 | * write exactly the remaining number of bytes. If we |
| 471 | * in the middle of the block, we have to write full |
| 472 | * words, so round down to an even multiple of 4. */ |
| 473 | if (fifo >= host->pio_bytes) |
| 474 | fifo = host->pio_bytes; |
| 475 | else |
| 476 | fifo -= fifo & 3; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 477 | |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 478 | host->pio_bytes -= fifo; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 479 | host->pio_count += fifo; |
| 480 | |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 481 | fifo = (fifo + 3) >> 2; |
ben@fluff.org.uk | 18280ff | 2008-10-15 00:17:18 +0100 | [diff] [blame] | 482 | ptr = host->pio_ptr; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 483 | while (fifo--) |
ben@fluff.org.uk | 18280ff | 2008-10-15 00:17:18 +0100 | [diff] [blame] | 484 | writel(*ptr++, to_ptr); |
| 485 | host->pio_ptr = ptr; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 486 | } |
| 487 | |
| 488 | enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF); |
| 489 | } |
| 490 | |
| 491 | static void pio_tasklet(unsigned long data) |
| 492 | { |
| 493 | struct s3cmci_host *host = (struct s3cmci_host *) data; |
| 494 | |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 495 | s3cmci_disable_irq(host, true); |
Roman Moracik | d643b5f | 2008-06-30 22:40:28 +0100 | [diff] [blame] | 496 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 497 | if (host->pio_active == XFER_WRITE) |
| 498 | do_pio_write(host); |
| 499 | |
| 500 | if (host->pio_active == XFER_READ) |
| 501 | do_pio_read(host); |
| 502 | |
| 503 | if (host->complete_what == COMPLETION_FINALIZE) { |
| 504 | clear_imask(host); |
| 505 | if (host->pio_active != XFER_NONE) { |
| 506 | dbg(host, dbg_err, "unfinished %s " |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 507 | "- pio_count:[%u] pio_bytes:[%u]\n", |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 508 | (host->pio_active == XFER_READ) ? "read" : "write", |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 509 | host->pio_count, host->pio_bytes); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 510 | |
Ben Dooks | 7c14450 | 2008-06-30 22:40:31 +0100 | [diff] [blame] | 511 | if (host->mrq->data) |
| 512 | host->mrq->data->error = -EINVAL; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 513 | } |
| 514 | |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 515 | s3cmci_enable_irq(host, false); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 516 | finalize_request(host); |
Roman Moracik | d643b5f | 2008-06-30 22:40:28 +0100 | [diff] [blame] | 517 | } else |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 518 | s3cmci_enable_irq(host, true); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 519 | } |
| 520 | |
| 521 | /* |
| 522 | * ISR for SDI Interface IRQ |
| 523 | * Communication between driver and ISR works as follows: |
| 524 | * host->mrq points to current request |
| 525 | * host->complete_what Indicates when the request is considered done |
| 526 | * COMPLETION_CMDSENT when the command was sent |
| 527 | * COMPLETION_RSPFIN when a response was received |
| 528 | * COMPLETION_XFERFINISH when the data transfer is finished |
| 529 | * COMPLETION_XFERFINISH_RSPFIN both of the above. |
| 530 | * host->complete_request is the completion-object the driver waits for |
| 531 | * |
| 532 | * 1) Driver sets up host->mrq and host->complete_what |
| 533 | * 2) Driver prepares the transfer |
| 534 | * 3) Driver enables interrupts |
| 535 | * 4) Driver starts transfer |
| 536 | * 5) Driver waits for host->complete_rquest |
| 537 | * 6) ISR checks for request status (errors and success) |
| 538 | * 6) ISR sets host->mrq->cmd->error and host->mrq->data->error |
| 539 | * 7) ISR completes host->complete_request |
| 540 | * 8) ISR disables interrupts |
| 541 | * 9) Driver wakes up and takes care of the request |
| 542 | * |
| 543 | * Note: "->error"-fields are expected to be set to 0 before the request |
| 544 | * was issued by mmc.c - therefore they are only set, when an error |
| 545 | * contition comes up |
| 546 | */ |
| 547 | |
| 548 | static irqreturn_t s3cmci_irq(int irq, void *dev_id) |
| 549 | { |
| 550 | struct s3cmci_host *host = dev_id; |
| 551 | struct mmc_command *cmd; |
| 552 | u32 mci_csta, mci_dsta, mci_fsta, mci_dcnt, mci_imsk; |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 553 | u32 mci_cclear = 0, mci_dclear; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 554 | unsigned long iflags; |
| 555 | |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 556 | mci_dsta = readl(host->base + S3C2410_SDIDSTA); |
| 557 | mci_imsk = readl(host->base + host->sdiimsk); |
| 558 | |
| 559 | if (mci_dsta & S3C2410_SDIDSTA_SDIOIRQDETECT) { |
| 560 | if (mci_imsk & S3C2410_SDIIMSK_SDIOIRQ) { |
| 561 | mci_dclear = S3C2410_SDIDSTA_SDIOIRQDETECT; |
| 562 | writel(mci_dclear, host->base + S3C2410_SDIDSTA); |
| 563 | |
| 564 | mmc_signal_sdio_irq(host->mmc); |
| 565 | return IRQ_HANDLED; |
| 566 | } |
| 567 | } |
| 568 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 569 | spin_lock_irqsave(&host->complete_lock, iflags); |
| 570 | |
| 571 | mci_csta = readl(host->base + S3C2410_SDICMDSTAT); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 572 | mci_dcnt = readl(host->base + S3C2410_SDIDCNT); |
| 573 | mci_fsta = readl(host->base + S3C2410_SDIFSTA); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 574 | mci_dclear = 0; |
| 575 | |
| 576 | if ((host->complete_what == COMPLETION_NONE) || |
| 577 | (host->complete_what == COMPLETION_FINALIZE)) { |
| 578 | host->status = "nothing to complete"; |
| 579 | clear_imask(host); |
| 580 | goto irq_out; |
| 581 | } |
| 582 | |
| 583 | if (!host->mrq) { |
| 584 | host->status = "no active mrq"; |
| 585 | clear_imask(host); |
| 586 | goto irq_out; |
| 587 | } |
| 588 | |
| 589 | cmd = host->cmd_is_stop ? host->mrq->stop : host->mrq->cmd; |
| 590 | |
| 591 | if (!cmd) { |
| 592 | host->status = "no active cmd"; |
| 593 | clear_imask(host); |
| 594 | goto irq_out; |
| 595 | } |
| 596 | |
Ben Dooks | 26f1494 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 597 | if (!s3cmci_host_usedma(host)) { |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 598 | if ((host->pio_active == XFER_WRITE) && |
| 599 | (mci_fsta & S3C2410_SDIFSTA_TFDET)) { |
| 600 | |
| 601 | disable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF); |
| 602 | tasklet_schedule(&host->pio_tasklet); |
| 603 | host->status = "pio tx"; |
| 604 | } |
| 605 | |
| 606 | if ((host->pio_active == XFER_READ) && |
| 607 | (mci_fsta & S3C2410_SDIFSTA_RFDET)) { |
| 608 | |
| 609 | disable_imask(host, |
| 610 | S3C2410_SDIIMSK_RXFIFOHALF | |
| 611 | S3C2410_SDIIMSK_RXFIFOLAST); |
| 612 | |
| 613 | tasklet_schedule(&host->pio_tasklet); |
| 614 | host->status = "pio rx"; |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | if (mci_csta & S3C2410_SDICMDSTAT_CMDTIMEOUT) { |
Ben Dooks | ff8c804 | 2008-06-30 22:40:37 +0100 | [diff] [blame] | 619 | dbg(host, dbg_err, "CMDSTAT: error CMDTIMEOUT\n"); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 620 | cmd->error = -ETIMEDOUT; |
| 621 | host->status = "error: command timeout"; |
| 622 | goto fail_transfer; |
| 623 | } |
| 624 | |
| 625 | if (mci_csta & S3C2410_SDICMDSTAT_CMDSENT) { |
| 626 | if (host->complete_what == COMPLETION_CMDSENT) { |
| 627 | host->status = "ok: command sent"; |
| 628 | goto close_transfer; |
| 629 | } |
| 630 | |
| 631 | mci_cclear |= S3C2410_SDICMDSTAT_CMDSENT; |
| 632 | } |
| 633 | |
| 634 | if (mci_csta & S3C2410_SDICMDSTAT_CRCFAIL) { |
| 635 | if (cmd->flags & MMC_RSP_CRC) { |
Harald Welte | 679f0f8 | 2008-06-30 22:40:25 +0100 | [diff] [blame] | 636 | if (host->mrq->cmd->flags & MMC_RSP_136) { |
| 637 | dbg(host, dbg_irq, |
| 638 | "fixup: ignore CRC fail with long rsp\n"); |
| 639 | } else { |
| 640 | /* note, we used to fail the transfer |
| 641 | * here, but it seems that this is just |
| 642 | * the hardware getting it wrong. |
| 643 | * |
| 644 | * cmd->error = -EILSEQ; |
| 645 | * host->status = "error: bad command crc"; |
| 646 | * goto fail_transfer; |
| 647 | */ |
| 648 | } |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 649 | } |
| 650 | |
| 651 | mci_cclear |= S3C2410_SDICMDSTAT_CRCFAIL; |
| 652 | } |
| 653 | |
| 654 | if (mci_csta & S3C2410_SDICMDSTAT_RSPFIN) { |
| 655 | if (host->complete_what == COMPLETION_RSPFIN) { |
| 656 | host->status = "ok: command response received"; |
| 657 | goto close_transfer; |
| 658 | } |
| 659 | |
| 660 | if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN) |
| 661 | host->complete_what = COMPLETION_XFERFINISH; |
| 662 | |
| 663 | mci_cclear |= S3C2410_SDICMDSTAT_RSPFIN; |
| 664 | } |
| 665 | |
| 666 | /* errors handled after this point are only relevant |
| 667 | when a data transfer is in progress */ |
| 668 | |
| 669 | if (!cmd->data) |
| 670 | goto clear_status_bits; |
| 671 | |
| 672 | /* Check for FIFO failure */ |
| 673 | if (host->is2440) { |
| 674 | if (mci_fsta & S3C2440_SDIFSTA_FIFOFAIL) { |
Ben Dooks | ff8c804 | 2008-06-30 22:40:37 +0100 | [diff] [blame] | 675 | dbg(host, dbg_err, "FIFO failure\n"); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 676 | host->mrq->data->error = -EILSEQ; |
| 677 | host->status = "error: 2440 fifo failure"; |
| 678 | goto fail_transfer; |
| 679 | } |
| 680 | } else { |
| 681 | if (mci_dsta & S3C2410_SDIDSTA_FIFOFAIL) { |
Ben Dooks | ff8c804 | 2008-06-30 22:40:37 +0100 | [diff] [blame] | 682 | dbg(host, dbg_err, "FIFO failure\n"); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 683 | cmd->data->error = -EILSEQ; |
| 684 | host->status = "error: fifo failure"; |
| 685 | goto fail_transfer; |
| 686 | } |
| 687 | } |
| 688 | |
| 689 | if (mci_dsta & S3C2410_SDIDSTA_RXCRCFAIL) { |
Ben Dooks | ff8c804 | 2008-06-30 22:40:37 +0100 | [diff] [blame] | 690 | dbg(host, dbg_err, "bad data crc (outgoing)\n"); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 691 | cmd->data->error = -EILSEQ; |
| 692 | host->status = "error: bad data crc (outgoing)"; |
| 693 | goto fail_transfer; |
| 694 | } |
| 695 | |
| 696 | if (mci_dsta & S3C2410_SDIDSTA_CRCFAIL) { |
Ben Dooks | ff8c804 | 2008-06-30 22:40:37 +0100 | [diff] [blame] | 697 | dbg(host, dbg_err, "bad data crc (incoming)\n"); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 698 | cmd->data->error = -EILSEQ; |
| 699 | host->status = "error: bad data crc (incoming)"; |
| 700 | goto fail_transfer; |
| 701 | } |
| 702 | |
| 703 | if (mci_dsta & S3C2410_SDIDSTA_DATATIMEOUT) { |
Ben Dooks | ff8c804 | 2008-06-30 22:40:37 +0100 | [diff] [blame] | 704 | dbg(host, dbg_err, "data timeout\n"); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 705 | cmd->data->error = -ETIMEDOUT; |
| 706 | host->status = "error: data timeout"; |
| 707 | goto fail_transfer; |
| 708 | } |
| 709 | |
| 710 | if (mci_dsta & S3C2410_SDIDSTA_XFERFINISH) { |
| 711 | if (host->complete_what == COMPLETION_XFERFINISH) { |
| 712 | host->status = "ok: data transfer completed"; |
| 713 | goto close_transfer; |
| 714 | } |
| 715 | |
| 716 | if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN) |
| 717 | host->complete_what = COMPLETION_RSPFIN; |
| 718 | |
| 719 | mci_dclear |= S3C2410_SDIDSTA_XFERFINISH; |
| 720 | } |
| 721 | |
| 722 | clear_status_bits: |
| 723 | writel(mci_cclear, host->base + S3C2410_SDICMDSTAT); |
| 724 | writel(mci_dclear, host->base + S3C2410_SDIDSTA); |
| 725 | |
| 726 | goto irq_out; |
| 727 | |
| 728 | fail_transfer: |
| 729 | host->pio_active = XFER_NONE; |
| 730 | |
| 731 | close_transfer: |
| 732 | host->complete_what = COMPLETION_FINALIZE; |
| 733 | |
| 734 | clear_imask(host); |
| 735 | tasklet_schedule(&host->pio_tasklet); |
| 736 | |
| 737 | goto irq_out; |
| 738 | |
| 739 | irq_out: |
| 740 | dbg(host, dbg_irq, |
| 741 | "csta:0x%08x dsta:0x%08x fsta:0x%08x dcnt:0x%08x status:%s.\n", |
| 742 | mci_csta, mci_dsta, mci_fsta, mci_dcnt, host->status); |
| 743 | |
| 744 | spin_unlock_irqrestore(&host->complete_lock, iflags); |
| 745 | return IRQ_HANDLED; |
| 746 | |
| 747 | } |
| 748 | |
| 749 | /* |
| 750 | * ISR for the CardDetect Pin |
| 751 | */ |
| 752 | |
| 753 | static irqreturn_t s3cmci_irq_cd(int irq, void *dev_id) |
| 754 | { |
| 755 | struct s3cmci_host *host = (struct s3cmci_host *)dev_id; |
| 756 | |
| 757 | dbg(host, dbg_irq, "card detect\n"); |
| 758 | |
Ben Dooks | 2de5f79 | 2008-06-30 22:40:35 +0100 | [diff] [blame] | 759 | mmc_detect_change(host->mmc, msecs_to_jiffies(500)); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 760 | |
| 761 | return IRQ_HANDLED; |
| 762 | } |
| 763 | |
Ben Dooks | 5d30440 | 2008-08-08 10:55:41 +0100 | [diff] [blame] | 764 | static void s3cmci_dma_done_callback(struct s3c2410_dma_chan *dma_ch, |
| 765 | void *buf_id, int size, |
| 766 | enum s3c2410_dma_buffresult result) |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 767 | { |
| 768 | struct s3cmci_host *host = buf_id; |
| 769 | unsigned long iflags; |
| 770 | u32 mci_csta, mci_dsta, mci_fsta, mci_dcnt; |
| 771 | |
| 772 | mci_csta = readl(host->base + S3C2410_SDICMDSTAT); |
| 773 | mci_dsta = readl(host->base + S3C2410_SDIDSTA); |
| 774 | mci_fsta = readl(host->base + S3C2410_SDIFSTA); |
| 775 | mci_dcnt = readl(host->base + S3C2410_SDIDCNT); |
| 776 | |
| 777 | BUG_ON(!host->mrq); |
| 778 | BUG_ON(!host->mrq->data); |
| 779 | BUG_ON(!host->dmatogo); |
| 780 | |
| 781 | spin_lock_irqsave(&host->complete_lock, iflags); |
| 782 | |
| 783 | if (result != S3C2410_RES_OK) { |
| 784 | dbg(host, dbg_fail, "DMA FAILED: csta=0x%08x dsta=0x%08x " |
| 785 | "fsta=0x%08x dcnt:0x%08x result:0x%08x toGo:%u\n", |
| 786 | mci_csta, mci_dsta, mci_fsta, |
| 787 | mci_dcnt, result, host->dmatogo); |
| 788 | |
| 789 | goto fail_request; |
| 790 | } |
| 791 | |
| 792 | host->dmatogo--; |
| 793 | if (host->dmatogo) { |
| 794 | dbg(host, dbg_dma, "DMA DONE Size:%i DSTA:[%08x] " |
| 795 | "DCNT:[%08x] toGo:%u\n", |
| 796 | size, mci_dsta, mci_dcnt, host->dmatogo); |
| 797 | |
| 798 | goto out; |
| 799 | } |
| 800 | |
| 801 | dbg(host, dbg_dma, "DMA FINISHED Size:%i DSTA:%08x DCNT:%08x\n", |
| 802 | size, mci_dsta, mci_dcnt); |
| 803 | |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 804 | host->dma_complete = 1; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 805 | host->complete_what = COMPLETION_FINALIZE; |
| 806 | |
| 807 | out: |
| 808 | tasklet_schedule(&host->pio_tasklet); |
| 809 | spin_unlock_irqrestore(&host->complete_lock, iflags); |
| 810 | return; |
| 811 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 812 | fail_request: |
| 813 | host->mrq->data->error = -EINVAL; |
| 814 | host->complete_what = COMPLETION_FINALIZE; |
Ben Dooks | e6130ae | 2009-10-01 15:44:16 -0700 | [diff] [blame] | 815 | clear_imask(host); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 816 | |
Ben Dooks | e6130ae | 2009-10-01 15:44:16 -0700 | [diff] [blame] | 817 | goto out; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 818 | } |
| 819 | |
| 820 | static void finalize_request(struct s3cmci_host *host) |
| 821 | { |
| 822 | struct mmc_request *mrq = host->mrq; |
Julia Lawall | 3423d80 | 2009-12-14 18:01:20 -0800 | [diff] [blame] | 823 | struct mmc_command *cmd; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 824 | int debug_as_failure = 0; |
| 825 | |
| 826 | if (host->complete_what != COMPLETION_FINALIZE) |
| 827 | return; |
| 828 | |
| 829 | if (!mrq) |
| 830 | return; |
Julia Lawall | 3423d80 | 2009-12-14 18:01:20 -0800 | [diff] [blame] | 831 | cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 832 | |
| 833 | if (cmd->data && (cmd->error == 0) && |
| 834 | (cmd->data->error == 0)) { |
Ben Dooks | 26f1494 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 835 | if (s3cmci_host_usedma(host) && (!host->dma_complete)) { |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 836 | dbg(host, dbg_dma, "DMA Missing (%d)!\n", |
| 837 | host->dma_complete); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 838 | return; |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | /* Read response from controller. */ |
| 843 | cmd->resp[0] = readl(host->base + S3C2410_SDIRSP0); |
| 844 | cmd->resp[1] = readl(host->base + S3C2410_SDIRSP1); |
| 845 | cmd->resp[2] = readl(host->base + S3C2410_SDIRSP2); |
| 846 | cmd->resp[3] = readl(host->base + S3C2410_SDIRSP3); |
| 847 | |
| 848 | writel(host->prescaler, host->base + S3C2410_SDIPRE); |
| 849 | |
| 850 | if (cmd->error) |
| 851 | debug_as_failure = 1; |
| 852 | |
| 853 | if (cmd->data && cmd->data->error) |
| 854 | debug_as_failure = 1; |
| 855 | |
| 856 | dbg_dumpcmd(host, cmd, debug_as_failure); |
| 857 | |
| 858 | /* Cleanup controller */ |
| 859 | writel(0, host->base + S3C2410_SDICMDARG); |
Thomas Kleffel | bdbc9c3 | 2008-06-30 22:40:27 +0100 | [diff] [blame] | 860 | writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 861 | writel(0, host->base + S3C2410_SDICMDCON); |
Ben Dooks | e6130ae | 2009-10-01 15:44:16 -0700 | [diff] [blame] | 862 | clear_imask(host); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 863 | |
| 864 | if (cmd->data && cmd->error) |
| 865 | cmd->data->error = cmd->error; |
| 866 | |
| 867 | if (cmd->data && cmd->data->stop && (!host->cmd_is_stop)) { |
| 868 | host->cmd_is_stop = 1; |
| 869 | s3cmci_send_request(host->mmc); |
| 870 | return; |
| 871 | } |
| 872 | |
| 873 | /* If we have no data transfer we are finished here */ |
| 874 | if (!mrq->data) |
| 875 | goto request_done; |
| 876 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 877 | /* Calculate the amout of bytes transfer if there was no error */ |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 878 | if (mrq->data->error == 0) { |
| 879 | mrq->data->bytes_xfered = |
| 880 | (mrq->data->blocks * mrq->data->blksz); |
| 881 | } else { |
| 882 | mrq->data->bytes_xfered = 0; |
| 883 | } |
| 884 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 885 | /* If we had an error while transferring data we flush the |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 886 | * DMA channel and the fifo to clear out any garbage. */ |
| 887 | if (mrq->data->error != 0) { |
Ben Dooks | 26f1494 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 888 | if (s3cmci_host_usedma(host)) |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 889 | s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH); |
| 890 | |
| 891 | if (host->is2440) { |
| 892 | /* Clear failure register and reset fifo. */ |
| 893 | writel(S3C2440_SDIFSTA_FIFORESET | |
| 894 | S3C2440_SDIFSTA_FIFOFAIL, |
| 895 | host->base + S3C2410_SDIFSTA); |
| 896 | } else { |
| 897 | u32 mci_con; |
| 898 | |
| 899 | /* reset fifo */ |
| 900 | mci_con = readl(host->base + S3C2410_SDICON); |
| 901 | mci_con |= S3C2410_SDICON_FIFORESET; |
| 902 | |
| 903 | writel(mci_con, host->base + S3C2410_SDICON); |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | request_done: |
| 908 | host->complete_what = COMPLETION_NONE; |
| 909 | host->mrq = NULL; |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 910 | |
| 911 | s3cmci_check_sdio_irq(host); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 912 | mmc_request_done(host->mmc, mrq); |
| 913 | } |
| 914 | |
Ben Dooks | 5d30440 | 2008-08-08 10:55:41 +0100 | [diff] [blame] | 915 | static void s3cmci_dma_setup(struct s3cmci_host *host, |
Boojin Kim | 51ddf31 | 2011-09-02 09:44:44 +0900 | [diff] [blame] | 916 | enum dma_data_direction source) |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 917 | { |
Boojin Kim | 51ddf31 | 2011-09-02 09:44:44 +0900 | [diff] [blame] | 918 | static enum dma_data_direction last_source = -1; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 919 | static int setup_ok; |
| 920 | |
| 921 | if (last_source == source) |
| 922 | return; |
| 923 | |
| 924 | last_source = source; |
| 925 | |
Ben Dooks | 8970ef4 | 2009-03-19 15:02:34 +0000 | [diff] [blame] | 926 | s3c2410_dma_devconfig(host->dma, source, |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 927 | host->mem->start + host->sdidata); |
| 928 | |
| 929 | if (!setup_ok) { |
Ben Dooks | fe9db6c | 2009-06-08 23:33:56 +0100 | [diff] [blame] | 930 | s3c2410_dma_config(host->dma, 4); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 931 | s3c2410_dma_set_buffdone_fn(host->dma, |
| 932 | s3cmci_dma_done_callback); |
| 933 | s3c2410_dma_setflags(host->dma, S3C2410_DMAF_AUTOSTART); |
| 934 | setup_ok = 1; |
| 935 | } |
| 936 | } |
| 937 | |
| 938 | static void s3cmci_send_command(struct s3cmci_host *host, |
| 939 | struct mmc_command *cmd) |
| 940 | { |
| 941 | u32 ccon, imsk; |
| 942 | |
| 943 | imsk = S3C2410_SDIIMSK_CRCSTATUS | S3C2410_SDIIMSK_CMDTIMEOUT | |
| 944 | S3C2410_SDIIMSK_RESPONSEND | S3C2410_SDIIMSK_CMDSENT | |
| 945 | S3C2410_SDIIMSK_RESPONSECRC; |
| 946 | |
| 947 | enable_imask(host, imsk); |
| 948 | |
| 949 | if (cmd->data) |
| 950 | host->complete_what = COMPLETION_XFERFINISH_RSPFIN; |
| 951 | else if (cmd->flags & MMC_RSP_PRESENT) |
| 952 | host->complete_what = COMPLETION_RSPFIN; |
| 953 | else |
| 954 | host->complete_what = COMPLETION_CMDSENT; |
| 955 | |
| 956 | writel(cmd->arg, host->base + S3C2410_SDICMDARG); |
| 957 | |
| 958 | ccon = cmd->opcode & S3C2410_SDICMDCON_INDEX; |
| 959 | ccon |= S3C2410_SDICMDCON_SENDERHOST | S3C2410_SDICMDCON_CMDSTART; |
| 960 | |
| 961 | if (cmd->flags & MMC_RSP_PRESENT) |
| 962 | ccon |= S3C2410_SDICMDCON_WAITRSP; |
| 963 | |
| 964 | if (cmd->flags & MMC_RSP_136) |
| 965 | ccon |= S3C2410_SDICMDCON_LONGRSP; |
| 966 | |
| 967 | writel(ccon, host->base + S3C2410_SDICMDCON); |
| 968 | } |
| 969 | |
| 970 | static int s3cmci_setup_data(struct s3cmci_host *host, struct mmc_data *data) |
| 971 | { |
| 972 | u32 dcon, imsk, stoptries = 3; |
| 973 | |
| 974 | /* write DCON register */ |
| 975 | |
| 976 | if (!data) { |
| 977 | writel(0, host->base + S3C2410_SDIDCON); |
| 978 | return 0; |
| 979 | } |
| 980 | |
Ben Dooks | 7e9c7b6 | 2008-06-30 22:40:39 +0100 | [diff] [blame] | 981 | if ((data->blksz & 3) != 0) { |
| 982 | /* We cannot deal with unaligned blocks with more than |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 983 | * one block being transferred. */ |
Ben Dooks | 7e9c7b6 | 2008-06-30 22:40:39 +0100 | [diff] [blame] | 984 | |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 985 | if (data->blocks > 1) { |
| 986 | pr_warning("%s: can't do non-word sized block transfers (blksz %d)\n", __func__, data->blksz); |
Ben Dooks | 7e9c7b6 | 2008-06-30 22:40:39 +0100 | [diff] [blame] | 987 | return -EINVAL; |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 988 | } |
Ben Dooks | 7e9c7b6 | 2008-06-30 22:40:39 +0100 | [diff] [blame] | 989 | } |
| 990 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 991 | while (readl(host->base + S3C2410_SDIDSTA) & |
| 992 | (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) { |
| 993 | |
| 994 | dbg(host, dbg_err, |
| 995 | "mci_setup_data() transfer stillin progress.\n"); |
| 996 | |
Thomas Kleffel | bdbc9c3 | 2008-06-30 22:40:27 +0100 | [diff] [blame] | 997 | writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 998 | s3cmci_reset(host); |
| 999 | |
| 1000 | if ((stoptries--) == 0) { |
| 1001 | dbg_dumpregs(host, "DRF"); |
| 1002 | return -EINVAL; |
| 1003 | } |
| 1004 | } |
| 1005 | |
| 1006 | dcon = data->blocks & S3C2410_SDIDCON_BLKNUM_MASK; |
| 1007 | |
Ben Dooks | 26f1494 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1008 | if (s3cmci_host_usedma(host)) |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1009 | dcon |= S3C2410_SDIDCON_DMAEN; |
| 1010 | |
| 1011 | if (host->bus_width == MMC_BUS_WIDTH_4) |
| 1012 | dcon |= S3C2410_SDIDCON_WIDEBUS; |
| 1013 | |
| 1014 | if (!(data->flags & MMC_DATA_STREAM)) |
| 1015 | dcon |= S3C2410_SDIDCON_BLOCKMODE; |
| 1016 | |
| 1017 | if (data->flags & MMC_DATA_WRITE) { |
| 1018 | dcon |= S3C2410_SDIDCON_TXAFTERRESP; |
| 1019 | dcon |= S3C2410_SDIDCON_XFER_TXSTART; |
| 1020 | } |
| 1021 | |
| 1022 | if (data->flags & MMC_DATA_READ) { |
| 1023 | dcon |= S3C2410_SDIDCON_RXAFTERCMD; |
| 1024 | dcon |= S3C2410_SDIDCON_XFER_RXSTART; |
| 1025 | } |
| 1026 | |
| 1027 | if (host->is2440) { |
| 1028 | dcon |= S3C2440_SDIDCON_DS_WORD; |
| 1029 | dcon |= S3C2440_SDIDCON_DATSTART; |
| 1030 | } |
| 1031 | |
| 1032 | writel(dcon, host->base + S3C2410_SDIDCON); |
| 1033 | |
| 1034 | /* write BSIZE register */ |
| 1035 | |
| 1036 | writel(data->blksz, host->base + S3C2410_SDIBSIZE); |
| 1037 | |
| 1038 | /* add to IMASK register */ |
| 1039 | imsk = S3C2410_SDIIMSK_FIFOFAIL | S3C2410_SDIIMSK_DATACRC | |
| 1040 | S3C2410_SDIIMSK_DATATIMEOUT | S3C2410_SDIIMSK_DATAFINISH; |
| 1041 | |
| 1042 | enable_imask(host, imsk); |
| 1043 | |
| 1044 | /* write TIMER register */ |
| 1045 | |
| 1046 | if (host->is2440) { |
| 1047 | writel(0x007FFFFF, host->base + S3C2410_SDITIMER); |
| 1048 | } else { |
| 1049 | writel(0x0000FFFF, host->base + S3C2410_SDITIMER); |
| 1050 | |
| 1051 | /* FIX: set slow clock to prevent timeouts on read */ |
| 1052 | if (data->flags & MMC_DATA_READ) |
| 1053 | writel(0xFF, host->base + S3C2410_SDIPRE); |
| 1054 | } |
| 1055 | |
| 1056 | return 0; |
| 1057 | } |
| 1058 | |
| 1059 | #define BOTH_DIR (MMC_DATA_WRITE | MMC_DATA_READ) |
| 1060 | |
| 1061 | static int s3cmci_prepare_pio(struct s3cmci_host *host, struct mmc_data *data) |
| 1062 | { |
| 1063 | int rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0; |
| 1064 | |
| 1065 | BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR); |
| 1066 | |
| 1067 | host->pio_sgptr = 0; |
Christer Weinigel | 088a78a | 2008-10-15 00:17:17 +0100 | [diff] [blame] | 1068 | host->pio_bytes = 0; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1069 | host->pio_count = 0; |
| 1070 | host->pio_active = rw ? XFER_WRITE : XFER_READ; |
| 1071 | |
| 1072 | if (rw) { |
| 1073 | do_pio_write(host); |
| 1074 | enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF); |
| 1075 | } else { |
| 1076 | enable_imask(host, S3C2410_SDIIMSK_RXFIFOHALF |
| 1077 | | S3C2410_SDIIMSK_RXFIFOLAST); |
| 1078 | } |
| 1079 | |
| 1080 | return 0; |
| 1081 | } |
| 1082 | |
| 1083 | static int s3cmci_prepare_dma(struct s3cmci_host *host, struct mmc_data *data) |
| 1084 | { |
| 1085 | int dma_len, i; |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 1086 | int rw = data->flags & MMC_DATA_WRITE; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1087 | |
| 1088 | BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR); |
| 1089 | |
Boojin Kim | 51ddf31 | 2011-09-02 09:44:44 +0900 | [diff] [blame] | 1090 | s3cmci_dma_setup(host, rw ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1091 | s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH); |
| 1092 | |
| 1093 | dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len, |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 1094 | rw ? DMA_TO_DEVICE : DMA_FROM_DEVICE); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1095 | |
| 1096 | if (dma_len == 0) |
| 1097 | return -ENOMEM; |
| 1098 | |
| 1099 | host->dma_complete = 0; |
| 1100 | host->dmatogo = dma_len; |
| 1101 | |
| 1102 | for (i = 0; i < dma_len; i++) { |
| 1103 | int res; |
| 1104 | |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 1105 | dbg(host, dbg_dma, "enqueue %i: %08x@%u\n", i, |
| 1106 | sg_dma_address(&data->sg[i]), |
| 1107 | sg_dma_len(&data->sg[i])); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1108 | |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 1109 | res = s3c2410_dma_enqueue(host->dma, host, |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1110 | sg_dma_address(&data->sg[i]), |
| 1111 | sg_dma_len(&data->sg[i])); |
| 1112 | |
| 1113 | if (res) { |
| 1114 | s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH); |
| 1115 | return -EBUSY; |
| 1116 | } |
| 1117 | } |
| 1118 | |
| 1119 | s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_START); |
| 1120 | |
| 1121 | return 0; |
| 1122 | } |
| 1123 | |
| 1124 | static void s3cmci_send_request(struct mmc_host *mmc) |
| 1125 | { |
| 1126 | struct s3cmci_host *host = mmc_priv(mmc); |
| 1127 | struct mmc_request *mrq = host->mrq; |
| 1128 | struct mmc_command *cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd; |
| 1129 | |
| 1130 | host->ccnt++; |
| 1131 | prepare_dbgmsg(host, cmd, host->cmd_is_stop); |
| 1132 | |
| 1133 | /* Clear command, data and fifo status registers |
| 1134 | Fifo clear only necessary on 2440, but doesn't hurt on 2410 |
| 1135 | */ |
| 1136 | writel(0xFFFFFFFF, host->base + S3C2410_SDICMDSTAT); |
| 1137 | writel(0xFFFFFFFF, host->base + S3C2410_SDIDSTA); |
| 1138 | writel(0xFFFFFFFF, host->base + S3C2410_SDIFSTA); |
| 1139 | |
| 1140 | if (cmd->data) { |
| 1141 | int res = s3cmci_setup_data(host, cmd->data); |
| 1142 | |
| 1143 | host->dcnt++; |
| 1144 | |
| 1145 | if (res) { |
Ben Dooks | ff8c804 | 2008-06-30 22:40:37 +0100 | [diff] [blame] | 1146 | dbg(host, dbg_err, "setup data error %d\n", res); |
| 1147 | cmd->error = res; |
| 1148 | cmd->data->error = res; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1149 | |
| 1150 | mmc_request_done(mmc, mrq); |
| 1151 | return; |
| 1152 | } |
| 1153 | |
Ben Dooks | 26f1494 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1154 | if (s3cmci_host_usedma(host)) |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1155 | res = s3cmci_prepare_dma(host, cmd->data); |
| 1156 | else |
| 1157 | res = s3cmci_prepare_pio(host, cmd->data); |
| 1158 | |
| 1159 | if (res) { |
Ben Dooks | ff8c804 | 2008-06-30 22:40:37 +0100 | [diff] [blame] | 1160 | dbg(host, dbg_err, "data prepare error %d\n", res); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1161 | cmd->error = res; |
| 1162 | cmd->data->error = res; |
| 1163 | |
| 1164 | mmc_request_done(mmc, mrq); |
| 1165 | return; |
| 1166 | } |
| 1167 | } |
| 1168 | |
| 1169 | /* Send command */ |
| 1170 | s3cmci_send_command(host, cmd); |
| 1171 | |
| 1172 | /* Enable Interrupt */ |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1173 | s3cmci_enable_irq(host, true); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1174 | } |
| 1175 | |
Ben Dooks | 87dd980 | 2008-08-12 09:24:50 +0100 | [diff] [blame] | 1176 | static int s3cmci_card_present(struct mmc_host *mmc) |
Ben Dooks | 50a8457 | 2008-06-30 22:40:36 +0100 | [diff] [blame] | 1177 | { |
Ben Dooks | 87dd980 | 2008-08-12 09:24:50 +0100 | [diff] [blame] | 1178 | struct s3cmci_host *host = mmc_priv(mmc); |
Ben Dooks | 50a8457 | 2008-06-30 22:40:36 +0100 | [diff] [blame] | 1179 | struct s3c24xx_mci_pdata *pdata = host->pdata; |
| 1180 | int ret; |
| 1181 | |
Lars-Peter Clausen | dc2ed55 | 2010-03-05 13:43:37 -0800 | [diff] [blame] | 1182 | if (pdata->no_detect) |
Ben Dooks | 50a8457 | 2008-06-30 22:40:36 +0100 | [diff] [blame] | 1183 | return -ENOSYS; |
| 1184 | |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1185 | ret = gpio_get_value(pdata->gpio_detect) ? 0 : 1; |
Ben Dooks | 50a8457 | 2008-06-30 22:40:36 +0100 | [diff] [blame] | 1186 | return ret ^ pdata->detect_invert; |
| 1187 | } |
| 1188 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1189 | static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq) |
| 1190 | { |
| 1191 | struct s3cmci_host *host = mmc_priv(mmc); |
| 1192 | |
| 1193 | host->status = "mmc request"; |
| 1194 | host->cmd_is_stop = 0; |
| 1195 | host->mrq = mrq; |
| 1196 | |
Ben Dooks | 87dd980 | 2008-08-12 09:24:50 +0100 | [diff] [blame] | 1197 | if (s3cmci_card_present(mmc) == 0) { |
Ben Dooks | 50a8457 | 2008-06-30 22:40:36 +0100 | [diff] [blame] | 1198 | dbg(host, dbg_err, "%s: no medium present\n", __func__); |
| 1199 | host->mrq->cmd->error = -ENOMEDIUM; |
| 1200 | mmc_request_done(mmc, mrq); |
| 1201 | } else |
| 1202 | s3cmci_send_request(mmc); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1203 | } |
| 1204 | |
ben@fluff.org.uk | f87e6d0 | 2008-10-15 00:17:16 +0100 | [diff] [blame] | 1205 | static void s3cmci_set_clk(struct s3cmci_host *host, struct mmc_ios *ios) |
| 1206 | { |
| 1207 | u32 mci_psc; |
| 1208 | |
| 1209 | /* Set clock */ |
| 1210 | for (mci_psc = 0; mci_psc < 255; mci_psc++) { |
| 1211 | host->real_rate = host->clk_rate / (host->clk_div*(mci_psc+1)); |
| 1212 | |
| 1213 | if (host->real_rate <= ios->clock) |
| 1214 | break; |
| 1215 | } |
| 1216 | |
| 1217 | if (mci_psc > 255) |
| 1218 | mci_psc = 255; |
| 1219 | |
| 1220 | host->prescaler = mci_psc; |
| 1221 | writel(host->prescaler, host->base + S3C2410_SDIPRE); |
| 1222 | |
| 1223 | /* If requested clock is 0, real_rate will be 0, too */ |
| 1224 | if (ios->clock == 0) |
| 1225 | host->real_rate = 0; |
| 1226 | } |
| 1227 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1228 | static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) |
| 1229 | { |
| 1230 | struct s3cmci_host *host = mmc_priv(mmc); |
ben@fluff.org.uk | f87e6d0 | 2008-10-15 00:17:16 +0100 | [diff] [blame] | 1231 | u32 mci_con; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1232 | |
| 1233 | /* Set the power state */ |
| 1234 | |
| 1235 | mci_con = readl(host->base + S3C2410_SDICON); |
| 1236 | |
| 1237 | switch (ios->power_mode) { |
| 1238 | case MMC_POWER_ON: |
| 1239 | case MMC_POWER_UP: |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1240 | s3c2410_gpio_cfgpin(S3C2410_GPE(5), S3C2410_GPE5_SDCLK); |
| 1241 | s3c2410_gpio_cfgpin(S3C2410_GPE(6), S3C2410_GPE6_SDCMD); |
| 1242 | s3c2410_gpio_cfgpin(S3C2410_GPE(7), S3C2410_GPE7_SDDAT0); |
| 1243 | s3c2410_gpio_cfgpin(S3C2410_GPE(8), S3C2410_GPE8_SDDAT1); |
| 1244 | s3c2410_gpio_cfgpin(S3C2410_GPE(9), S3C2410_GPE9_SDDAT2); |
| 1245 | s3c2410_gpio_cfgpin(S3C2410_GPE(10), S3C2410_GPE10_SDDAT3); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1246 | |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1247 | if (host->pdata->set_power) |
| 1248 | host->pdata->set_power(ios->power_mode, ios->vdd); |
| 1249 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1250 | if (!host->is2440) |
| 1251 | mci_con |= S3C2410_SDICON_FIFORESET; |
| 1252 | |
| 1253 | break; |
| 1254 | |
| 1255 | case MMC_POWER_OFF: |
| 1256 | default: |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1257 | gpio_direction_output(S3C2410_GPE(5), 0); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1258 | |
| 1259 | if (host->is2440) |
| 1260 | mci_con |= S3C2440_SDICON_SDRESET; |
| 1261 | |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1262 | if (host->pdata->set_power) |
| 1263 | host->pdata->set_power(ios->power_mode, ios->vdd); |
| 1264 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1265 | break; |
| 1266 | } |
| 1267 | |
ben@fluff.org.uk | f87e6d0 | 2008-10-15 00:17:16 +0100 | [diff] [blame] | 1268 | s3cmci_set_clk(host, ios); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1269 | |
| 1270 | /* Set CLOCK_ENABLE */ |
| 1271 | if (ios->clock) |
| 1272 | mci_con |= S3C2410_SDICON_CLOCKTYPE; |
| 1273 | else |
| 1274 | mci_con &= ~S3C2410_SDICON_CLOCKTYPE; |
| 1275 | |
| 1276 | writel(mci_con, host->base + S3C2410_SDICON); |
| 1277 | |
| 1278 | if ((ios->power_mode == MMC_POWER_ON) || |
| 1279 | (ios->power_mode == MMC_POWER_UP)) { |
| 1280 | dbg(host, dbg_conf, "running at %lukHz (requested: %ukHz).\n", |
| 1281 | host->real_rate/1000, ios->clock/1000); |
| 1282 | } else { |
| 1283 | dbg(host, dbg_conf, "powered down.\n"); |
| 1284 | } |
| 1285 | |
| 1286 | host->bus_width = ios->bus_width; |
| 1287 | } |
| 1288 | |
| 1289 | static void s3cmci_reset(struct s3cmci_host *host) |
| 1290 | { |
| 1291 | u32 con = readl(host->base + S3C2410_SDICON); |
| 1292 | |
| 1293 | con |= S3C2440_SDICON_SDRESET; |
| 1294 | writel(con, host->base + S3C2410_SDICON); |
| 1295 | } |
| 1296 | |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1297 | static int s3cmci_get_ro(struct mmc_host *mmc) |
| 1298 | { |
| 1299 | struct s3cmci_host *host = mmc_priv(mmc); |
Ben Dooks | cf0984c | 2008-06-30 22:40:30 +0100 | [diff] [blame] | 1300 | struct s3c24xx_mci_pdata *pdata = host->pdata; |
| 1301 | int ret; |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1302 | |
Ben Dooks | 00acfae | 2009-10-01 15:44:21 -0700 | [diff] [blame] | 1303 | if (pdata->no_wprotect) |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1304 | return 0; |
| 1305 | |
Ben Dooks | c78402e | 2009-12-14 18:01:27 -0800 | [diff] [blame] | 1306 | ret = gpio_get_value(pdata->gpio_wprotect) ? 1 : 0; |
| 1307 | ret ^= pdata->wprotect_invert; |
Ben Dooks | cf0984c | 2008-06-30 22:40:30 +0100 | [diff] [blame] | 1308 | |
| 1309 | return ret; |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1310 | } |
| 1311 | |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1312 | static void s3cmci_enable_sdio_irq(struct mmc_host *mmc, int enable) |
| 1313 | { |
| 1314 | struct s3cmci_host *host = mmc_priv(mmc); |
| 1315 | unsigned long flags; |
| 1316 | u32 con; |
| 1317 | |
| 1318 | local_irq_save(flags); |
| 1319 | |
| 1320 | con = readl(host->base + S3C2410_SDICON); |
| 1321 | host->sdio_irqen = enable; |
| 1322 | |
| 1323 | if (enable == host->sdio_irqen) |
| 1324 | goto same_state; |
| 1325 | |
| 1326 | if (enable) { |
| 1327 | con |= S3C2410_SDICON_SDIOIRQ; |
| 1328 | enable_imask(host, S3C2410_SDIIMSK_SDIOIRQ); |
| 1329 | |
| 1330 | if (!host->irq_state && !host->irq_disabled) { |
| 1331 | host->irq_state = true; |
| 1332 | enable_irq(host->irq); |
| 1333 | } |
| 1334 | } else { |
| 1335 | disable_imask(host, S3C2410_SDIIMSK_SDIOIRQ); |
| 1336 | con &= ~S3C2410_SDICON_SDIOIRQ; |
| 1337 | |
| 1338 | if (!host->irq_enabled && host->irq_state) { |
| 1339 | disable_irq_nosync(host->irq); |
| 1340 | host->irq_state = false; |
| 1341 | } |
| 1342 | } |
| 1343 | |
| 1344 | writel(con, host->base + S3C2410_SDICON); |
| 1345 | |
| 1346 | same_state: |
| 1347 | local_irq_restore(flags); |
| 1348 | |
| 1349 | s3cmci_check_sdio_irq(host); |
| 1350 | } |
| 1351 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1352 | static struct mmc_host_ops s3cmci_ops = { |
| 1353 | .request = s3cmci_request, |
| 1354 | .set_ios = s3cmci_set_ios, |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1355 | .get_ro = s3cmci_get_ro, |
Ben Dooks | 87dd980 | 2008-08-12 09:24:50 +0100 | [diff] [blame] | 1356 | .get_cd = s3cmci_card_present, |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1357 | .enable_sdio_irq = s3cmci_enable_sdio_irq, |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1358 | }; |
| 1359 | |
| 1360 | static struct s3c24xx_mci_pdata s3cmci_def_pdata = { |
| 1361 | /* This is currently here to avoid a number of if (host->pdata) |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 1362 | * checks. Any zero fields to ensure reasonable defaults are picked. */ |
Lars-Peter Clausen | c212808 | 2010-03-05 13:43:35 -0800 | [diff] [blame] | 1363 | .no_wprotect = 1, |
| 1364 | .no_detect = 1, |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1365 | }; |
| 1366 | |
ben@fluff.org.uk | f87e6d0 | 2008-10-15 00:17:16 +0100 | [diff] [blame] | 1367 | #ifdef CONFIG_CPU_FREQ |
| 1368 | |
| 1369 | static int s3cmci_cpufreq_transition(struct notifier_block *nb, |
| 1370 | unsigned long val, void *data) |
| 1371 | { |
| 1372 | struct s3cmci_host *host; |
| 1373 | struct mmc_host *mmc; |
| 1374 | unsigned long newclk; |
| 1375 | unsigned long flags; |
| 1376 | |
| 1377 | host = container_of(nb, struct s3cmci_host, freq_transition); |
| 1378 | newclk = clk_get_rate(host->clk); |
| 1379 | mmc = host->mmc; |
| 1380 | |
| 1381 | if ((val == CPUFREQ_PRECHANGE && newclk > host->clk_rate) || |
| 1382 | (val == CPUFREQ_POSTCHANGE && newclk < host->clk_rate)) { |
| 1383 | spin_lock_irqsave(&mmc->lock, flags); |
| 1384 | |
| 1385 | host->clk_rate = newclk; |
| 1386 | |
| 1387 | if (mmc->ios.power_mode != MMC_POWER_OFF && |
| 1388 | mmc->ios.clock != 0) |
| 1389 | s3cmci_set_clk(host, &mmc->ios); |
| 1390 | |
| 1391 | spin_unlock_irqrestore(&mmc->lock, flags); |
| 1392 | } |
| 1393 | |
| 1394 | return 0; |
| 1395 | } |
| 1396 | |
| 1397 | static inline int s3cmci_cpufreq_register(struct s3cmci_host *host) |
| 1398 | { |
| 1399 | host->freq_transition.notifier_call = s3cmci_cpufreq_transition; |
| 1400 | |
| 1401 | return cpufreq_register_notifier(&host->freq_transition, |
| 1402 | CPUFREQ_TRANSITION_NOTIFIER); |
| 1403 | } |
| 1404 | |
| 1405 | static inline void s3cmci_cpufreq_deregister(struct s3cmci_host *host) |
| 1406 | { |
| 1407 | cpufreq_unregister_notifier(&host->freq_transition, |
| 1408 | CPUFREQ_TRANSITION_NOTIFIER); |
| 1409 | } |
| 1410 | |
| 1411 | #else |
| 1412 | static inline int s3cmci_cpufreq_register(struct s3cmci_host *host) |
| 1413 | { |
| 1414 | return 0; |
| 1415 | } |
| 1416 | |
| 1417 | static inline void s3cmci_cpufreq_deregister(struct s3cmci_host *host) |
| 1418 | { |
| 1419 | } |
| 1420 | #endif |
| 1421 | |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1422 | |
Ben Dooks | 9bdd203 | 2009-10-01 15:44:17 -0700 | [diff] [blame] | 1423 | #ifdef CONFIG_DEBUG_FS |
| 1424 | |
| 1425 | static int s3cmci_state_show(struct seq_file *seq, void *v) |
| 1426 | { |
| 1427 | struct s3cmci_host *host = seq->private; |
| 1428 | |
| 1429 | seq_printf(seq, "Register base = 0x%08x\n", (u32)host->base); |
| 1430 | seq_printf(seq, "Clock rate = %ld\n", host->clk_rate); |
| 1431 | seq_printf(seq, "Prescale = %d\n", host->prescaler); |
| 1432 | seq_printf(seq, "is2440 = %d\n", host->is2440); |
| 1433 | seq_printf(seq, "IRQ = %d\n", host->irq); |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1434 | seq_printf(seq, "IRQ enabled = %d\n", host->irq_enabled); |
| 1435 | seq_printf(seq, "IRQ disabled = %d\n", host->irq_disabled); |
| 1436 | seq_printf(seq, "IRQ state = %d\n", host->irq_state); |
Ben Dooks | 9bdd203 | 2009-10-01 15:44:17 -0700 | [diff] [blame] | 1437 | seq_printf(seq, "CD IRQ = %d\n", host->irq_cd); |
Ben Dooks | 26f1494 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1438 | seq_printf(seq, "Do DMA = %d\n", s3cmci_host_usedma(host)); |
Ben Dooks | 9bdd203 | 2009-10-01 15:44:17 -0700 | [diff] [blame] | 1439 | seq_printf(seq, "SDIIMSK at %d\n", host->sdiimsk); |
| 1440 | seq_printf(seq, "SDIDATA at %d\n", host->sdidata); |
| 1441 | |
| 1442 | return 0; |
| 1443 | } |
| 1444 | |
| 1445 | static int s3cmci_state_open(struct inode *inode, struct file *file) |
| 1446 | { |
| 1447 | return single_open(file, s3cmci_state_show, inode->i_private); |
| 1448 | } |
| 1449 | |
| 1450 | static const struct file_operations s3cmci_fops_state = { |
| 1451 | .owner = THIS_MODULE, |
| 1452 | .open = s3cmci_state_open, |
| 1453 | .read = seq_read, |
| 1454 | .llseek = seq_lseek, |
| 1455 | .release = single_release, |
| 1456 | }; |
| 1457 | |
| 1458 | #define DBG_REG(_r) { .addr = S3C2410_SDI##_r, .name = #_r } |
| 1459 | |
| 1460 | struct s3cmci_reg { |
| 1461 | unsigned short addr; |
| 1462 | unsigned char *name; |
| 1463 | } debug_regs[] = { |
| 1464 | DBG_REG(CON), |
| 1465 | DBG_REG(PRE), |
| 1466 | DBG_REG(CMDARG), |
| 1467 | DBG_REG(CMDCON), |
| 1468 | DBG_REG(CMDSTAT), |
| 1469 | DBG_REG(RSP0), |
| 1470 | DBG_REG(RSP1), |
| 1471 | DBG_REG(RSP2), |
| 1472 | DBG_REG(RSP3), |
| 1473 | DBG_REG(TIMER), |
| 1474 | DBG_REG(BSIZE), |
| 1475 | DBG_REG(DCON), |
| 1476 | DBG_REG(DCNT), |
| 1477 | DBG_REG(DSTA), |
| 1478 | DBG_REG(FSTA), |
| 1479 | {} |
| 1480 | }; |
| 1481 | |
| 1482 | static int s3cmci_regs_show(struct seq_file *seq, void *v) |
| 1483 | { |
| 1484 | struct s3cmci_host *host = seq->private; |
| 1485 | struct s3cmci_reg *rptr = debug_regs; |
| 1486 | |
| 1487 | for (; rptr->name; rptr++) |
| 1488 | seq_printf(seq, "SDI%s\t=0x%08x\n", rptr->name, |
| 1489 | readl(host->base + rptr->addr)); |
| 1490 | |
| 1491 | seq_printf(seq, "SDIIMSK\t=0x%08x\n", readl(host->base + host->sdiimsk)); |
| 1492 | |
| 1493 | return 0; |
| 1494 | } |
| 1495 | |
| 1496 | static int s3cmci_regs_open(struct inode *inode, struct file *file) |
| 1497 | { |
| 1498 | return single_open(file, s3cmci_regs_show, inode->i_private); |
| 1499 | } |
| 1500 | |
| 1501 | static const struct file_operations s3cmci_fops_regs = { |
| 1502 | .owner = THIS_MODULE, |
| 1503 | .open = s3cmci_regs_open, |
| 1504 | .read = seq_read, |
| 1505 | .llseek = seq_lseek, |
| 1506 | .release = single_release, |
| 1507 | }; |
| 1508 | |
| 1509 | static void s3cmci_debugfs_attach(struct s3cmci_host *host) |
| 1510 | { |
| 1511 | struct device *dev = &host->pdev->dev; |
| 1512 | |
| 1513 | host->debug_root = debugfs_create_dir(dev_name(dev), NULL); |
| 1514 | if (IS_ERR(host->debug_root)) { |
| 1515 | dev_err(dev, "failed to create debugfs root\n"); |
| 1516 | return; |
| 1517 | } |
| 1518 | |
| 1519 | host->debug_state = debugfs_create_file("state", 0444, |
| 1520 | host->debug_root, host, |
| 1521 | &s3cmci_fops_state); |
| 1522 | |
| 1523 | if (IS_ERR(host->debug_state)) |
| 1524 | dev_err(dev, "failed to create debug state file\n"); |
| 1525 | |
| 1526 | host->debug_regs = debugfs_create_file("regs", 0444, |
| 1527 | host->debug_root, host, |
| 1528 | &s3cmci_fops_regs); |
| 1529 | |
| 1530 | if (IS_ERR(host->debug_regs)) |
| 1531 | dev_err(dev, "failed to create debug regs file\n"); |
| 1532 | } |
| 1533 | |
| 1534 | static void s3cmci_debugfs_remove(struct s3cmci_host *host) |
| 1535 | { |
| 1536 | debugfs_remove(host->debug_regs); |
| 1537 | debugfs_remove(host->debug_state); |
| 1538 | debugfs_remove(host->debug_root); |
| 1539 | } |
| 1540 | |
| 1541 | #else |
| 1542 | static inline void s3cmci_debugfs_attach(struct s3cmci_host *host) { } |
| 1543 | static inline void s3cmci_debugfs_remove(struct s3cmci_host *host) { } |
| 1544 | |
| 1545 | #endif /* CONFIG_DEBUG_FS */ |
| 1546 | |
Ben Dooks | 44d0e19 | 2009-10-01 15:44:14 -0700 | [diff] [blame] | 1547 | static int __devinit s3cmci_probe(struct platform_device *pdev) |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1548 | { |
| 1549 | struct s3cmci_host *host; |
| 1550 | struct mmc_host *mmc; |
| 1551 | int ret; |
Ben Dooks | 44d0e19 | 2009-10-01 15:44:14 -0700 | [diff] [blame] | 1552 | int is2440; |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1553 | int i; |
Ben Dooks | 44d0e19 | 2009-10-01 15:44:14 -0700 | [diff] [blame] | 1554 | |
| 1555 | is2440 = platform_get_device_id(pdev)->driver_data; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1556 | |
| 1557 | mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev); |
| 1558 | if (!mmc) { |
| 1559 | ret = -ENOMEM; |
| 1560 | goto probe_out; |
| 1561 | } |
| 1562 | |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1563 | for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) { |
| 1564 | ret = gpio_request(i, dev_name(&pdev->dev)); |
| 1565 | if (ret) { |
| 1566 | dev_err(&pdev->dev, "failed to get gpio %d\n", i); |
| 1567 | |
| 1568 | for (i--; i >= S3C2410_GPE(5); i--) |
| 1569 | gpio_free(i); |
| 1570 | |
| 1571 | goto probe_free_host; |
| 1572 | } |
| 1573 | } |
| 1574 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1575 | host = mmc_priv(mmc); |
| 1576 | host->mmc = mmc; |
| 1577 | host->pdev = pdev; |
| 1578 | host->is2440 = is2440; |
| 1579 | |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1580 | host->pdata = pdev->dev.platform_data; |
| 1581 | if (!host->pdata) { |
| 1582 | pdev->dev.platform_data = &s3cmci_def_pdata; |
| 1583 | host->pdata = &s3cmci_def_pdata; |
| 1584 | } |
| 1585 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1586 | spin_lock_init(&host->complete_lock); |
| 1587 | tasklet_init(&host->pio_tasklet, pio_tasklet, (unsigned long) host); |
| 1588 | |
| 1589 | if (is2440) { |
| 1590 | host->sdiimsk = S3C2440_SDIIMSK; |
| 1591 | host->sdidata = S3C2440_SDIDATA; |
| 1592 | host->clk_div = 1; |
| 1593 | } else { |
| 1594 | host->sdiimsk = S3C2410_SDIIMSK; |
| 1595 | host->sdidata = S3C2410_SDIDATA; |
| 1596 | host->clk_div = 2; |
| 1597 | } |
| 1598 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1599 | host->complete_what = COMPLETION_NONE; |
| 1600 | host->pio_active = XFER_NONE; |
| 1601 | |
Ben Dooks | 26f1494 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1602 | #ifdef CONFIG_MMC_S3C_PIODMA |
Jiri Pinkava | 60c2c0d | 2010-05-25 09:48:58 +0200 | [diff] [blame] | 1603 | host->dodma = host->pdata->use_dma; |
Ben Dooks | 26f1494 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1604 | #endif |
| 1605 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1606 | host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1607 | if (!host->mem) { |
| 1608 | dev_err(&pdev->dev, |
Masanari Iida | 4aa6ded | 2012-01-29 21:58:57 +0900 | [diff] [blame] | 1609 | "failed to get io memory region resource.\n"); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1610 | |
| 1611 | ret = -ENOENT; |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1612 | goto probe_free_gpio; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1613 | } |
| 1614 | |
| 1615 | host->mem = request_mem_region(host->mem->start, |
Ben Dooks | da52a7c | 2009-10-01 15:44:13 -0700 | [diff] [blame] | 1616 | resource_size(host->mem), pdev->name); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1617 | |
| 1618 | if (!host->mem) { |
| 1619 | dev_err(&pdev->dev, "failed to request io memory region.\n"); |
| 1620 | ret = -ENOENT; |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1621 | goto probe_free_gpio; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1622 | } |
| 1623 | |
Ben Dooks | da52a7c | 2009-10-01 15:44:13 -0700 | [diff] [blame] | 1624 | host->base = ioremap(host->mem->start, resource_size(host->mem)); |
Ben Dooks | 5d30440 | 2008-08-08 10:55:41 +0100 | [diff] [blame] | 1625 | if (!host->base) { |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1626 | dev_err(&pdev->dev, "failed to ioremap() io memory region.\n"); |
| 1627 | ret = -EINVAL; |
| 1628 | goto probe_free_mem_region; |
| 1629 | } |
| 1630 | |
| 1631 | host->irq = platform_get_irq(pdev, 0); |
| 1632 | if (host->irq == 0) { |
Masanari Iida | 4aa6ded | 2012-01-29 21:58:57 +0900 | [diff] [blame] | 1633 | dev_err(&pdev->dev, "failed to get interrupt resource.\n"); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1634 | ret = -EINVAL; |
| 1635 | goto probe_iounmap; |
| 1636 | } |
| 1637 | |
| 1638 | if (request_irq(host->irq, s3cmci_irq, 0, DRIVER_NAME, host)) { |
| 1639 | dev_err(&pdev->dev, "failed to request mci interrupt.\n"); |
| 1640 | ret = -ENOENT; |
| 1641 | goto probe_iounmap; |
| 1642 | } |
| 1643 | |
| 1644 | /* We get spurious interrupts even when we have set the IMSK |
| 1645 | * register to ignore everything, so use disable_irq() to make |
| 1646 | * ensure we don't lock the system with un-serviceable requests. */ |
| 1647 | |
| 1648 | disable_irq(host->irq); |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1649 | host->irq_state = false; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1650 | |
Ben Dooks | 00acfae | 2009-10-01 15:44:21 -0700 | [diff] [blame] | 1651 | if (!host->pdata->no_detect) { |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1652 | ret = gpio_request(host->pdata->gpio_detect, "s3cmci detect"); |
| 1653 | if (ret) { |
| 1654 | dev_err(&pdev->dev, "failed to get detect gpio\n"); |
| 1655 | goto probe_free_irq; |
| 1656 | } |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1657 | |
Ben Dooks | c78402e | 2009-12-14 18:01:27 -0800 | [diff] [blame] | 1658 | host->irq_cd = gpio_to_irq(host->pdata->gpio_detect); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1659 | |
Ben Dooks | 00acfae | 2009-10-01 15:44:21 -0700 | [diff] [blame] | 1660 | if (host->irq_cd >= 0) { |
| 1661 | if (request_irq(host->irq_cd, s3cmci_irq_cd, |
| 1662 | IRQF_TRIGGER_RISING | |
| 1663 | IRQF_TRIGGER_FALLING, |
| 1664 | DRIVER_NAME, host)) { |
| 1665 | dev_err(&pdev->dev, |
| 1666 | "can't get card detect irq.\n"); |
| 1667 | ret = -ENOENT; |
| 1668 | goto probe_free_gpio_cd; |
| 1669 | } |
| 1670 | } else { |
| 1671 | dev_warn(&pdev->dev, |
| 1672 | "host detect has no irq available\n"); |
| 1673 | gpio_direction_input(host->pdata->gpio_detect); |
Ben Dooks | 55d70f5 | 2008-06-30 22:40:32 +0100 | [diff] [blame] | 1674 | } |
Ben Dooks | 00acfae | 2009-10-01 15:44:21 -0700 | [diff] [blame] | 1675 | } else |
| 1676 | host->irq_cd = -1; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1677 | |
Ben Dooks | 00acfae | 2009-10-01 15:44:21 -0700 | [diff] [blame] | 1678 | if (!host->pdata->no_wprotect) { |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1679 | ret = gpio_request(host->pdata->gpio_wprotect, "s3cmci wp"); |
| 1680 | if (ret) { |
| 1681 | dev_err(&pdev->dev, "failed to get writeprotect\n"); |
| 1682 | goto probe_free_irq_cd; |
| 1683 | } |
| 1684 | |
| 1685 | gpio_direction_input(host->pdata->gpio_wprotect); |
| 1686 | } |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1687 | |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 1688 | /* depending on the dma state, get a dma channel to use. */ |
| 1689 | |
| 1690 | if (s3cmci_host_usedma(host)) { |
| 1691 | host->dma = s3c2410_dma_request(DMACH_SDI, &s3cmci_dma_client, |
| 1692 | host); |
| 1693 | if (host->dma < 0) { |
| 1694 | dev_err(&pdev->dev, "cannot get DMA channel.\n"); |
| 1695 | if (!s3cmci_host_canpio()) { |
| 1696 | ret = -EBUSY; |
| 1697 | goto probe_free_gpio_wp; |
| 1698 | } else { |
| 1699 | dev_warn(&pdev->dev, "falling back to PIO.\n"); |
| 1700 | host->dodma = 0; |
| 1701 | } |
| 1702 | } |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1703 | } |
| 1704 | |
| 1705 | host->clk = clk_get(&pdev->dev, "sdi"); |
| 1706 | if (IS_ERR(host->clk)) { |
| 1707 | dev_err(&pdev->dev, "failed to find clock source.\n"); |
| 1708 | ret = PTR_ERR(host->clk); |
| 1709 | host->clk = NULL; |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 1710 | goto probe_free_dma; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1711 | } |
| 1712 | |
| 1713 | ret = clk_enable(host->clk); |
| 1714 | if (ret) { |
| 1715 | dev_err(&pdev->dev, "failed to enable clock source.\n"); |
| 1716 | goto clk_free; |
| 1717 | } |
| 1718 | |
| 1719 | host->clk_rate = clk_get_rate(host->clk); |
| 1720 | |
| 1721 | mmc->ops = &s3cmci_ops; |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1722 | mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; |
Ben Dooks | 5a2c4fe | 2009-10-01 15:44:20 -0700 | [diff] [blame] | 1723 | #ifdef CONFIG_MMC_S3C_HW_SDIO_IRQ |
Ben Dooks | c225889 | 2009-10-01 15:44:18 -0700 | [diff] [blame] | 1724 | mmc->caps = MMC_CAP_4_BIT_DATA | MMC_CAP_SDIO_IRQ; |
Ben Dooks | 5a2c4fe | 2009-10-01 15:44:20 -0700 | [diff] [blame] | 1725 | #else |
| 1726 | mmc->caps = MMC_CAP_4_BIT_DATA; |
| 1727 | #endif |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1728 | mmc->f_min = host->clk_rate / (host->clk_div * 256); |
| 1729 | mmc->f_max = host->clk_rate / host->clk_div; |
| 1730 | |
Ben Dooks | edb5a98 | 2008-06-30 22:40:29 +0100 | [diff] [blame] | 1731 | if (host->pdata->ocr_avail) |
| 1732 | mmc->ocr_avail = host->pdata->ocr_avail; |
| 1733 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1734 | mmc->max_blk_count = 4095; |
| 1735 | mmc->max_blk_size = 4095; |
| 1736 | mmc->max_req_size = 4095 * 512; |
| 1737 | mmc->max_seg_size = mmc->max_req_size; |
| 1738 | |
Martin K. Petersen | a36274e | 2010-09-10 01:33:59 -0400 | [diff] [blame] | 1739 | mmc->max_segs = 128; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1740 | |
| 1741 | dbg(host, dbg_debug, |
| 1742 | "probe: mode:%s mapped mci_base:%p irq:%u irq_cd:%u dma:%u.\n", |
| 1743 | (host->is2440?"2440":""), |
| 1744 | host->base, host->irq, host->irq_cd, host->dma); |
| 1745 | |
ben@fluff.org.uk | f87e6d0 | 2008-10-15 00:17:16 +0100 | [diff] [blame] | 1746 | ret = s3cmci_cpufreq_register(host); |
| 1747 | if (ret) { |
| 1748 | dev_err(&pdev->dev, "failed to register cpufreq\n"); |
| 1749 | goto free_dmabuf; |
| 1750 | } |
| 1751 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1752 | ret = mmc_add_host(mmc); |
| 1753 | if (ret) { |
| 1754 | dev_err(&pdev->dev, "failed to add mmc host.\n"); |
ben@fluff.org.uk | f87e6d0 | 2008-10-15 00:17:16 +0100 | [diff] [blame] | 1755 | goto free_cpufreq; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1756 | } |
| 1757 | |
Ben Dooks | 9bdd203 | 2009-10-01 15:44:17 -0700 | [diff] [blame] | 1758 | s3cmci_debugfs_attach(host); |
| 1759 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1760 | platform_set_drvdata(pdev, mmc); |
Ben Dooks | 5a2c4fe | 2009-10-01 15:44:20 -0700 | [diff] [blame] | 1761 | dev_info(&pdev->dev, "%s - using %s, %s SDIO IRQ\n", mmc_hostname(mmc), |
| 1762 | s3cmci_host_usedma(host) ? "dma" : "pio", |
| 1763 | mmc->caps & MMC_CAP_SDIO_IRQ ? "hw" : "sw"); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1764 | |
| 1765 | return 0; |
| 1766 | |
ben@fluff.org.uk | f87e6d0 | 2008-10-15 00:17:16 +0100 | [diff] [blame] | 1767 | free_cpufreq: |
| 1768 | s3cmci_cpufreq_deregister(host); |
| 1769 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1770 | free_dmabuf: |
| 1771 | clk_disable(host->clk); |
| 1772 | |
| 1773 | clk_free: |
| 1774 | clk_put(host->clk); |
| 1775 | |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 1776 | probe_free_dma: |
| 1777 | if (s3cmci_host_usedma(host)) |
| 1778 | s3c2410_dma_free(host->dma, &s3cmci_dma_client); |
| 1779 | |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1780 | probe_free_gpio_wp: |
Ben Dooks | 00acfae | 2009-10-01 15:44:21 -0700 | [diff] [blame] | 1781 | if (!host->pdata->no_wprotect) |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1782 | gpio_free(host->pdata->gpio_wprotect); |
| 1783 | |
| 1784 | probe_free_gpio_cd: |
Ben Dooks | 00acfae | 2009-10-01 15:44:21 -0700 | [diff] [blame] | 1785 | if (!host->pdata->no_detect) |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1786 | gpio_free(host->pdata->gpio_detect); |
| 1787 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1788 | probe_free_irq_cd: |
Ben Dooks | 55d70f5 | 2008-06-30 22:40:32 +0100 | [diff] [blame] | 1789 | if (host->irq_cd >= 0) |
| 1790 | free_irq(host->irq_cd, host); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1791 | |
| 1792 | probe_free_irq: |
| 1793 | free_irq(host->irq, host); |
| 1794 | |
| 1795 | probe_iounmap: |
| 1796 | iounmap(host->base); |
| 1797 | |
| 1798 | probe_free_mem_region: |
Ben Dooks | da52a7c | 2009-10-01 15:44:13 -0700 | [diff] [blame] | 1799 | release_mem_region(host->mem->start, resource_size(host->mem)); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1800 | |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1801 | probe_free_gpio: |
| 1802 | for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) |
| 1803 | gpio_free(i); |
| 1804 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1805 | probe_free_host: |
| 1806 | mmc_free_host(mmc); |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1807 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1808 | probe_out: |
| 1809 | return ret; |
| 1810 | } |
| 1811 | |
Ben Dooks | 907b2cd | 2008-07-17 15:32:54 +0100 | [diff] [blame] | 1812 | static void s3cmci_shutdown(struct platform_device *pdev) |
| 1813 | { |
| 1814 | struct mmc_host *mmc = platform_get_drvdata(pdev); |
| 1815 | struct s3cmci_host *host = mmc_priv(mmc); |
| 1816 | |
| 1817 | if (host->irq_cd >= 0) |
| 1818 | free_irq(host->irq_cd, host); |
| 1819 | |
Ben Dooks | 9bdd203 | 2009-10-01 15:44:17 -0700 | [diff] [blame] | 1820 | s3cmci_debugfs_remove(host); |
ben@fluff.org.uk | f87e6d0 | 2008-10-15 00:17:16 +0100 | [diff] [blame] | 1821 | s3cmci_cpufreq_deregister(host); |
Ben Dooks | 907b2cd | 2008-07-17 15:32:54 +0100 | [diff] [blame] | 1822 | mmc_remove_host(mmc); |
| 1823 | clk_disable(host->clk); |
| 1824 | } |
| 1825 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1826 | static int __devexit s3cmci_remove(struct platform_device *pdev) |
| 1827 | { |
| 1828 | struct mmc_host *mmc = platform_get_drvdata(pdev); |
| 1829 | struct s3cmci_host *host = mmc_priv(mmc); |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1830 | struct s3c24xx_mci_pdata *pd = host->pdata; |
| 1831 | int i; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1832 | |
Ben Dooks | 907b2cd | 2008-07-17 15:32:54 +0100 | [diff] [blame] | 1833 | s3cmci_shutdown(pdev); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1834 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1835 | clk_put(host->clk); |
| 1836 | |
| 1837 | tasklet_disable(&host->pio_tasklet); |
Ben Dooks | 68c5ed5 | 2009-10-01 15:44:19 -0700 | [diff] [blame] | 1838 | |
| 1839 | if (s3cmci_host_usedma(host)) |
| 1840 | s3c2410_dma_free(host->dma, &s3cmci_dma_client); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1841 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1842 | free_irq(host->irq, host); |
| 1843 | |
Ben Dooks | 00acfae | 2009-10-01 15:44:21 -0700 | [diff] [blame] | 1844 | if (!pd->no_wprotect) |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1845 | gpio_free(pd->gpio_wprotect); |
| 1846 | |
Ben Dooks | 00acfae | 2009-10-01 15:44:21 -0700 | [diff] [blame] | 1847 | if (!pd->no_detect) |
Ben Dooks | 916a307 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1848 | gpio_free(pd->gpio_detect); |
| 1849 | |
| 1850 | for (i = S3C2410_GPE(5); i <= S3C2410_GPE(10); i++) |
| 1851 | gpio_free(i); |
| 1852 | |
| 1853 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1854 | iounmap(host->base); |
Ben Dooks | da52a7c | 2009-10-01 15:44:13 -0700 | [diff] [blame] | 1855 | release_mem_region(host->mem->start, resource_size(host->mem)); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1856 | |
| 1857 | mmc_free_host(mmc); |
| 1858 | return 0; |
| 1859 | } |
| 1860 | |
Ben Dooks | 44d0e19 | 2009-10-01 15:44:14 -0700 | [diff] [blame] | 1861 | static struct platform_device_id s3cmci_driver_ids[] = { |
| 1862 | { |
| 1863 | .name = "s3c2410-sdi", |
| 1864 | .driver_data = 0, |
| 1865 | }, { |
| 1866 | .name = "s3c2412-sdi", |
| 1867 | .driver_data = 1, |
| 1868 | }, { |
| 1869 | .name = "s3c2440-sdi", |
| 1870 | .driver_data = 1, |
| 1871 | }, |
| 1872 | { } |
| 1873 | }; |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1874 | |
Ben Dooks | 44d0e19 | 2009-10-01 15:44:14 -0700 | [diff] [blame] | 1875 | MODULE_DEVICE_TABLE(platform, s3cmci_driver_ids); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1876 | |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1877 | |
| 1878 | #ifdef CONFIG_PM |
| 1879 | |
Ben Dooks | 50d7fa9 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1880 | static int s3cmci_suspend(struct device *dev) |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1881 | { |
Ben Dooks | 50d7fa9 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1882 | struct mmc_host *mmc = platform_get_drvdata(to_platform_device(dev)); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1883 | |
Matt Fleming | 1a13f8f | 2010-05-26 14:42:08 -0700 | [diff] [blame] | 1884 | return mmc_suspend_host(mmc); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1885 | } |
| 1886 | |
Ben Dooks | 50d7fa9 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1887 | static int s3cmci_resume(struct device *dev) |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1888 | { |
Ben Dooks | 50d7fa9 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1889 | struct mmc_host *mmc = platform_get_drvdata(to_platform_device(dev)); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1890 | |
| 1891 | return mmc_resume_host(mmc); |
| 1892 | } |
| 1893 | |
Alexey Dobriyan | 4714521 | 2009-12-14 18:00:08 -0800 | [diff] [blame] | 1894 | static const struct dev_pm_ops s3cmci_pm = { |
Ben Dooks | 50d7fa9 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1895 | .suspend = s3cmci_suspend, |
| 1896 | .resume = s3cmci_resume, |
| 1897 | }; |
| 1898 | |
| 1899 | #define s3cmci_pm_ops &s3cmci_pm |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1900 | #else /* CONFIG_PM */ |
Ben Dooks | 50d7fa9 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1901 | #define s3cmci_pm_ops NULL |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1902 | #endif /* CONFIG_PM */ |
| 1903 | |
| 1904 | |
Ben Dooks | 44d0e19 | 2009-10-01 15:44:14 -0700 | [diff] [blame] | 1905 | static struct platform_driver s3cmci_driver = { |
Ben Dooks | 50d7fa9 | 2009-10-01 15:44:15 -0700 | [diff] [blame] | 1906 | .driver = { |
| 1907 | .name = "s3c-sdi", |
| 1908 | .owner = THIS_MODULE, |
| 1909 | .pm = s3cmci_pm_ops, |
| 1910 | }, |
Ben Dooks | 44d0e19 | 2009-10-01 15:44:14 -0700 | [diff] [blame] | 1911 | .id_table = s3cmci_driver_ids, |
| 1912 | .probe = s3cmci_probe, |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1913 | .remove = __devexit_p(s3cmci_remove), |
Ben Dooks | 907b2cd | 2008-07-17 15:32:54 +0100 | [diff] [blame] | 1914 | .shutdown = s3cmci_shutdown, |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1915 | }; |
| 1916 | |
Axel Lin | d1f81a6 | 2011-11-26 12:55:43 +0800 | [diff] [blame] | 1917 | module_platform_driver(s3cmci_driver); |
Thomas Kleffel | be51801 | 2008-06-30 22:40:24 +0100 | [diff] [blame] | 1918 | |
| 1919 | MODULE_DESCRIPTION("Samsung S3C MMC/SD Card Interface driver"); |
| 1920 | MODULE_LICENSE("GPL v2"); |
ben@fluff.org.uk | 08c55e2 | 2008-10-15 00:17:19 +0100 | [diff] [blame] | 1921 | MODULE_AUTHOR("Thomas Kleffel <tk@maintech.de>, Ben Dooks <ben-linux@fluff.org>"); |