Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/mmc/wbsd.c - Winbond W83L51xD SD/MMC driver |
| 3 | * |
| 4 | * Copyright (C) 2004-2005 Pierre Ossman, All Rights Reserved. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | * |
| 10 | * |
| 11 | * Warning! |
| 12 | * |
| 13 | * Changes to the FIFO system should be done with extreme care since |
| 14 | * the hardware is full of bugs related to the FIFO. Known issues are: |
| 15 | * |
| 16 | * - FIFO size field in FSR is always zero. |
| 17 | * |
| 18 | * - FIFO interrupts tend not to work as they should. Interrupts are |
| 19 | * triggered only for full/empty events, not for threshold values. |
| 20 | * |
| 21 | * - On APIC systems the FIFO empty interrupt is sometimes lost. |
| 22 | */ |
| 23 | |
| 24 | #include <linux/config.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/moduleparam.h> |
| 27 | #include <linux/init.h> |
| 28 | #include <linux/ioport.h> |
Russell King | d052d1b | 2005-10-29 19:07:23 +0100 | [diff] [blame] | 29 | #include <linux/platform_device.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/interrupt.h> |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 31 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/delay.h> |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 33 | #include <linux/pnp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/highmem.h> |
| 35 | #include <linux/mmc/host.h> |
| 36 | #include <linux/mmc/protocol.h> |
| 37 | |
| 38 | #include <asm/io.h> |
| 39 | #include <asm/dma.h> |
| 40 | #include <asm/scatterlist.h> |
| 41 | |
| 42 | #include "wbsd.h" |
| 43 | |
| 44 | #define DRIVER_NAME "wbsd" |
Pierre Ossman | 1656fa5 | 2005-09-03 16:45:49 +0100 | [diff] [blame] | 45 | #define DRIVER_VERSION "1.4" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | #ifdef CONFIG_MMC_DEBUG |
| 48 | #define DBG(x...) \ |
| 49 | printk(KERN_DEBUG DRIVER_NAME ": " x) |
| 50 | #define DBGF(f, x...) \ |
| 51 | printk(KERN_DEBUG DRIVER_NAME " [%s()]: " f, __func__ , ##x) |
| 52 | #else |
| 53 | #define DBG(x...) do { } while (0) |
| 54 | #define DBGF(x...) do { } while (0) |
| 55 | #endif |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | /* |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 58 | * Device resources |
| 59 | */ |
| 60 | |
| 61 | #ifdef CONFIG_PNP |
| 62 | |
| 63 | static const struct pnp_device_id pnp_dev_table[] = { |
| 64 | { "WEC0517", 0 }, |
| 65 | { "WEC0518", 0 }, |
| 66 | { "", 0 }, |
| 67 | }; |
| 68 | |
| 69 | MODULE_DEVICE_TABLE(pnp, pnp_dev_table); |
| 70 | |
| 71 | #endif /* CONFIG_PNP */ |
| 72 | |
Adrian Bunk | 3eee0d0 | 2005-07-01 13:07:37 +0100 | [diff] [blame] | 73 | static const int config_ports[] = { 0x2E, 0x4E }; |
| 74 | static const int unlock_codes[] = { 0x83, 0x87 }; |
| 75 | |
| 76 | static const int valid_ids[] = { |
| 77 | 0x7112, |
| 78 | }; |
| 79 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 80 | #ifdef CONFIG_PNP |
| 81 | static unsigned int nopnp = 0; |
| 82 | #else |
| 83 | static const unsigned int nopnp = 1; |
| 84 | #endif |
| 85 | static unsigned int io = 0x248; |
| 86 | static unsigned int irq = 6; |
| 87 | static int dma = 2; |
| 88 | |
| 89 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | * Basic functions |
| 91 | */ |
| 92 | |
| 93 | static inline void wbsd_unlock_config(struct wbsd_host* host) |
| 94 | { |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 95 | BUG_ON(host->config == 0); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 96 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | outb(host->unlock_code, host->config); |
| 98 | outb(host->unlock_code, host->config); |
| 99 | } |
| 100 | |
| 101 | static inline void wbsd_lock_config(struct wbsd_host* host) |
| 102 | { |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 103 | BUG_ON(host->config == 0); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | outb(LOCK_CODE, host->config); |
| 106 | } |
| 107 | |
| 108 | static inline void wbsd_write_config(struct wbsd_host* host, u8 reg, u8 value) |
| 109 | { |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 110 | BUG_ON(host->config == 0); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | outb(reg, host->config); |
| 113 | outb(value, host->config + 1); |
| 114 | } |
| 115 | |
| 116 | static inline u8 wbsd_read_config(struct wbsd_host* host, u8 reg) |
| 117 | { |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 118 | BUG_ON(host->config == 0); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 119 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | outb(reg, host->config); |
| 121 | return inb(host->config + 1); |
| 122 | } |
| 123 | |
| 124 | static inline void wbsd_write_index(struct wbsd_host* host, u8 index, u8 value) |
| 125 | { |
| 126 | outb(index, host->base + WBSD_IDXR); |
| 127 | outb(value, host->base + WBSD_DATAR); |
| 128 | } |
| 129 | |
| 130 | static inline u8 wbsd_read_index(struct wbsd_host* host, u8 index) |
| 131 | { |
| 132 | outb(index, host->base + WBSD_IDXR); |
| 133 | return inb(host->base + WBSD_DATAR); |
| 134 | } |
| 135 | |
| 136 | /* |
| 137 | * Common routines |
| 138 | */ |
| 139 | |
| 140 | static void wbsd_init_device(struct wbsd_host* host) |
| 141 | { |
| 142 | u8 setup, ier; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | /* |
| 145 | * Reset chip (SD/MMC part) and fifo. |
| 146 | */ |
| 147 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); |
| 148 | setup |= WBSD_FIFO_RESET | WBSD_SOFT_RESET; |
| 149 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 150 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | /* |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 152 | * Set DAT3 to input |
| 153 | */ |
| 154 | setup &= ~WBSD_DAT3_H; |
| 155 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); |
| 156 | host->flags &= ~WBSD_FIGNORE_DETECT; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 157 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 158 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | * Read back default clock. |
| 160 | */ |
| 161 | host->clk = wbsd_read_index(host, WBSD_IDX_CLK); |
| 162 | |
| 163 | /* |
| 164 | * Power down port. |
| 165 | */ |
| 166 | outb(WBSD_POWER_N, host->base + WBSD_CSR); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | /* |
| 169 | * Set maximum timeout. |
| 170 | */ |
| 171 | wbsd_write_index(host, WBSD_IDX_TAAC, 0x7F); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | /* |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 174 | * Test for card presence |
| 175 | */ |
| 176 | if (inb(host->base + WBSD_CSR) & WBSD_CARDPRESENT) |
| 177 | host->flags |= WBSD_FCARD_PRESENT; |
| 178 | else |
| 179 | host->flags &= ~WBSD_FCARD_PRESENT; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 180 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 181 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | * Enable interesting interrupts. |
| 183 | */ |
| 184 | ier = 0; |
| 185 | ier |= WBSD_EINT_CARD; |
| 186 | ier |= WBSD_EINT_FIFO_THRE; |
| 187 | ier |= WBSD_EINT_CCRC; |
| 188 | ier |= WBSD_EINT_TIMEOUT; |
| 189 | ier |= WBSD_EINT_CRC; |
| 190 | ier |= WBSD_EINT_TC; |
| 191 | |
| 192 | outb(ier, host->base + WBSD_EIR); |
| 193 | |
| 194 | /* |
| 195 | * Clear interrupts. |
| 196 | */ |
| 197 | inb(host->base + WBSD_ISR); |
| 198 | } |
| 199 | |
| 200 | static void wbsd_reset(struct wbsd_host* host) |
| 201 | { |
| 202 | u8 setup; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | printk(KERN_ERR DRIVER_NAME ": Resetting chip\n"); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 205 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | /* |
| 207 | * Soft reset of chip (SD/MMC part). |
| 208 | */ |
| 209 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); |
| 210 | setup |= WBSD_SOFT_RESET; |
| 211 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); |
| 212 | } |
| 213 | |
| 214 | static void wbsd_request_end(struct wbsd_host* host, struct mmc_request* mrq) |
| 215 | { |
| 216 | unsigned long dmaflags; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | DBGF("Ending request, cmd (%x)\n", mrq->cmd->opcode); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 219 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | if (host->dma >= 0) |
| 221 | { |
| 222 | /* |
| 223 | * Release ISA DMA controller. |
| 224 | */ |
| 225 | dmaflags = claim_dma_lock(); |
| 226 | disable_dma(host->dma); |
| 227 | clear_dma_ff(host->dma); |
| 228 | release_dma_lock(dmaflags); |
| 229 | |
| 230 | /* |
| 231 | * Disable DMA on host. |
| 232 | */ |
| 233 | wbsd_write_index(host, WBSD_IDX_DMA, 0); |
| 234 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 235 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | host->mrq = NULL; |
| 237 | |
| 238 | /* |
| 239 | * MMC layer might call back into the driver so first unlock. |
| 240 | */ |
| 241 | spin_unlock(&host->lock); |
| 242 | mmc_request_done(host->mmc, mrq); |
| 243 | spin_lock(&host->lock); |
| 244 | } |
| 245 | |
| 246 | /* |
| 247 | * Scatter/gather functions |
| 248 | */ |
| 249 | |
| 250 | static inline void wbsd_init_sg(struct wbsd_host* host, struct mmc_data* data) |
| 251 | { |
| 252 | /* |
| 253 | * Get info. about SG list from data structure. |
| 254 | */ |
| 255 | host->cur_sg = data->sg; |
| 256 | host->num_sg = data->sg_len; |
| 257 | |
| 258 | host->offset = 0; |
| 259 | host->remain = host->cur_sg->length; |
| 260 | } |
| 261 | |
| 262 | static inline int wbsd_next_sg(struct wbsd_host* host) |
| 263 | { |
| 264 | /* |
| 265 | * Skip to next SG entry. |
| 266 | */ |
| 267 | host->cur_sg++; |
| 268 | host->num_sg--; |
| 269 | |
| 270 | /* |
| 271 | * Any entries left? |
| 272 | */ |
| 273 | if (host->num_sg > 0) |
| 274 | { |
| 275 | host->offset = 0; |
| 276 | host->remain = host->cur_sg->length; |
| 277 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | return host->num_sg; |
| 280 | } |
| 281 | |
| 282 | static inline char* wbsd_kmap_sg(struct wbsd_host* host) |
| 283 | { |
| 284 | host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ) + |
| 285 | host->cur_sg->offset; |
| 286 | return host->mapped_sg; |
| 287 | } |
| 288 | |
| 289 | static inline void wbsd_kunmap_sg(struct wbsd_host* host) |
| 290 | { |
| 291 | kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ); |
| 292 | } |
| 293 | |
| 294 | static inline void wbsd_sg_to_dma(struct wbsd_host* host, struct mmc_data* data) |
| 295 | { |
| 296 | unsigned int len, i, size; |
| 297 | struct scatterlist* sg; |
| 298 | char* dmabuf = host->dma_buffer; |
| 299 | char* sgbuf; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 300 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | size = host->size; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | sg = data->sg; |
| 304 | len = data->sg_len; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 305 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | /* |
| 307 | * Just loop through all entries. Size might not |
| 308 | * be the entire list though so make sure that |
| 309 | * we do not transfer too much. |
| 310 | */ |
| 311 | for (i = 0;i < len;i++) |
| 312 | { |
| 313 | sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset; |
| 314 | if (size < sg[i].length) |
| 315 | memcpy(dmabuf, sgbuf, size); |
| 316 | else |
| 317 | memcpy(dmabuf, sgbuf, sg[i].length); |
| 318 | kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ); |
| 319 | dmabuf += sg[i].length; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 320 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | if (size < sg[i].length) |
| 322 | size = 0; |
| 323 | else |
| 324 | size -= sg[i].length; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | if (size == 0) |
| 327 | break; |
| 328 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | /* |
| 331 | * Check that we didn't get a request to transfer |
| 332 | * more data than can fit into the SG list. |
| 333 | */ |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 334 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | BUG_ON(size != 0); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | host->size -= size; |
| 338 | } |
| 339 | |
| 340 | static inline void wbsd_dma_to_sg(struct wbsd_host* host, struct mmc_data* data) |
| 341 | { |
| 342 | unsigned int len, i, size; |
| 343 | struct scatterlist* sg; |
| 344 | char* dmabuf = host->dma_buffer; |
| 345 | char* sgbuf; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | size = host->size; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | sg = data->sg; |
| 350 | len = data->sg_len; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 351 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | /* |
| 353 | * Just loop through all entries. Size might not |
| 354 | * be the entire list though so make sure that |
| 355 | * we do not transfer too much. |
| 356 | */ |
| 357 | for (i = 0;i < len;i++) |
| 358 | { |
| 359 | sgbuf = kmap_atomic(sg[i].page, KM_BIO_SRC_IRQ) + sg[i].offset; |
| 360 | if (size < sg[i].length) |
| 361 | memcpy(sgbuf, dmabuf, size); |
| 362 | else |
| 363 | memcpy(sgbuf, dmabuf, sg[i].length); |
| 364 | kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ); |
| 365 | dmabuf += sg[i].length; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 366 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | if (size < sg[i].length) |
| 368 | size = 0; |
| 369 | else |
| 370 | size -= sg[i].length; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 371 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | if (size == 0) |
| 373 | break; |
| 374 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 375 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | /* |
| 377 | * Check that we didn't get a request to transfer |
| 378 | * more data than can fit into the SG list. |
| 379 | */ |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 380 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | BUG_ON(size != 0); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | host->size -= size; |
| 384 | } |
| 385 | |
| 386 | /* |
| 387 | * Command handling |
| 388 | */ |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | static inline void wbsd_get_short_reply(struct wbsd_host* host, |
| 391 | struct mmc_command* cmd) |
| 392 | { |
| 393 | /* |
| 394 | * Correct response type? |
| 395 | */ |
| 396 | if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_SHORT) |
| 397 | { |
| 398 | cmd->error = MMC_ERR_INVALID; |
| 399 | return; |
| 400 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | cmd->resp[0] = |
| 403 | wbsd_read_index(host, WBSD_IDX_RESP12) << 24; |
| 404 | cmd->resp[0] |= |
| 405 | wbsd_read_index(host, WBSD_IDX_RESP13) << 16; |
| 406 | cmd->resp[0] |= |
| 407 | wbsd_read_index(host, WBSD_IDX_RESP14) << 8; |
| 408 | cmd->resp[0] |= |
| 409 | wbsd_read_index(host, WBSD_IDX_RESP15) << 0; |
| 410 | cmd->resp[1] = |
| 411 | wbsd_read_index(host, WBSD_IDX_RESP16) << 24; |
| 412 | } |
| 413 | |
| 414 | static inline void wbsd_get_long_reply(struct wbsd_host* host, |
| 415 | struct mmc_command* cmd) |
| 416 | { |
| 417 | int i; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | /* |
| 420 | * Correct response type? |
| 421 | */ |
| 422 | if (wbsd_read_index(host, WBSD_IDX_RSPLEN) != WBSD_RSP_LONG) |
| 423 | { |
| 424 | cmd->error = MMC_ERR_INVALID; |
| 425 | return; |
| 426 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 427 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | for (i = 0;i < 4;i++) |
| 429 | { |
| 430 | cmd->resp[i] = |
| 431 | wbsd_read_index(host, WBSD_IDX_RESP1 + i * 4) << 24; |
| 432 | cmd->resp[i] |= |
| 433 | wbsd_read_index(host, WBSD_IDX_RESP2 + i * 4) << 16; |
| 434 | cmd->resp[i] |= |
| 435 | wbsd_read_index(host, WBSD_IDX_RESP3 + i * 4) << 8; |
| 436 | cmd->resp[i] |= |
| 437 | wbsd_read_index(host, WBSD_IDX_RESP4 + i * 4) << 0; |
| 438 | } |
| 439 | } |
| 440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | static void wbsd_send_command(struct wbsd_host* host, struct mmc_command* cmd) |
| 442 | { |
| 443 | int i; |
| 444 | u8 status, isr; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 445 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | DBGF("Sending cmd (%x)\n", cmd->opcode); |
| 447 | |
| 448 | /* |
| 449 | * Clear accumulated ISR. The interrupt routine |
| 450 | * will fill this one with events that occur during |
| 451 | * transfer. |
| 452 | */ |
| 453 | host->isr = 0; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 454 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | /* |
| 456 | * Send the command (CRC calculated by host). |
| 457 | */ |
| 458 | outb(cmd->opcode, host->base + WBSD_CMDR); |
| 459 | for (i = 3;i >= 0;i--) |
| 460 | outb((cmd->arg >> (i * 8)) & 0xff, host->base + WBSD_CMDR); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 461 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | cmd->error = MMC_ERR_NONE; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | /* |
| 465 | * Wait for the request to complete. |
| 466 | */ |
| 467 | do { |
| 468 | status = wbsd_read_index(host, WBSD_IDX_STATUS); |
| 469 | } while (status & WBSD_CARDTRAFFIC); |
| 470 | |
| 471 | /* |
| 472 | * Do we expect a reply? |
| 473 | */ |
| 474 | if ((cmd->flags & MMC_RSP_MASK) != MMC_RSP_NONE) |
| 475 | { |
| 476 | /* |
| 477 | * Read back status. |
| 478 | */ |
| 479 | isr = host->isr; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 480 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | /* Card removed? */ |
| 482 | if (isr & WBSD_INT_CARD) |
| 483 | cmd->error = MMC_ERR_TIMEOUT; |
| 484 | /* Timeout? */ |
| 485 | else if (isr & WBSD_INT_TIMEOUT) |
| 486 | cmd->error = MMC_ERR_TIMEOUT; |
| 487 | /* CRC? */ |
| 488 | else if ((cmd->flags & MMC_RSP_CRC) && (isr & WBSD_INT_CRC)) |
| 489 | cmd->error = MMC_ERR_BADCRC; |
| 490 | /* All ok */ |
| 491 | else |
| 492 | { |
| 493 | if ((cmd->flags & MMC_RSP_MASK) == MMC_RSP_SHORT) |
| 494 | wbsd_get_short_reply(host, cmd); |
| 495 | else |
| 496 | wbsd_get_long_reply(host, cmd); |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | DBGF("Sent cmd (%x), res %d\n", cmd->opcode, cmd->error); |
| 501 | } |
| 502 | |
| 503 | /* |
| 504 | * Data functions |
| 505 | */ |
| 506 | |
| 507 | static void wbsd_empty_fifo(struct wbsd_host* host) |
| 508 | { |
| 509 | struct mmc_data* data = host->mrq->cmd->data; |
| 510 | char* buffer; |
| 511 | int i, fsr, fifo; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 512 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | /* |
| 514 | * Handle excessive data. |
| 515 | */ |
| 516 | if (data->bytes_xfered == host->size) |
| 517 | return; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | buffer = wbsd_kmap_sg(host) + host->offset; |
| 520 | |
| 521 | /* |
| 522 | * Drain the fifo. This has a tendency to loop longer |
| 523 | * than the FIFO length (usually one block). |
| 524 | */ |
| 525 | while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_EMPTY)) |
| 526 | { |
| 527 | /* |
| 528 | * The size field in the FSR is broken so we have to |
| 529 | * do some guessing. |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 530 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | if (fsr & WBSD_FIFO_FULL) |
| 532 | fifo = 16; |
| 533 | else if (fsr & WBSD_FIFO_FUTHRE) |
| 534 | fifo = 8; |
| 535 | else |
| 536 | fifo = 1; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 537 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | for (i = 0;i < fifo;i++) |
| 539 | { |
| 540 | *buffer = inb(host->base + WBSD_DFR); |
| 541 | buffer++; |
| 542 | host->offset++; |
| 543 | host->remain--; |
| 544 | |
| 545 | data->bytes_xfered++; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 546 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | /* |
| 548 | * Transfer done? |
| 549 | */ |
| 550 | if (data->bytes_xfered == host->size) |
| 551 | { |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 552 | wbsd_kunmap_sg(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | return; |
| 554 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 555 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | /* |
| 557 | * End of scatter list entry? |
| 558 | */ |
| 559 | if (host->remain == 0) |
| 560 | { |
| 561 | wbsd_kunmap_sg(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | /* |
| 564 | * Get next entry. Check if last. |
| 565 | */ |
| 566 | if (!wbsd_next_sg(host)) |
| 567 | { |
| 568 | /* |
| 569 | * We should never reach this point. |
| 570 | * It means that we're trying to |
| 571 | * transfer more blocks than can fit |
| 572 | * into the scatter list. |
| 573 | */ |
| 574 | BUG_ON(1); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | host->size = data->bytes_xfered; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 577 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | return; |
| 579 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 580 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | buffer = wbsd_kmap_sg(host); |
| 582 | } |
| 583 | } |
| 584 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 585 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | wbsd_kunmap_sg(host); |
| 587 | |
| 588 | /* |
| 589 | * This is a very dirty hack to solve a |
| 590 | * hardware problem. The chip doesn't trigger |
| 591 | * FIFO threshold interrupts properly. |
| 592 | */ |
| 593 | if ((host->size - data->bytes_xfered) < 16) |
| 594 | tasklet_schedule(&host->fifo_tasklet); |
| 595 | } |
| 596 | |
| 597 | static void wbsd_fill_fifo(struct wbsd_host* host) |
| 598 | { |
| 599 | struct mmc_data* data = host->mrq->cmd->data; |
| 600 | char* buffer; |
| 601 | int i, fsr, fifo; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 602 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | /* |
| 604 | * Check that we aren't being called after the |
| 605 | * entire buffer has been transfered. |
| 606 | */ |
| 607 | if (data->bytes_xfered == host->size) |
| 608 | return; |
| 609 | |
| 610 | buffer = wbsd_kmap_sg(host) + host->offset; |
| 611 | |
| 612 | /* |
| 613 | * Fill the fifo. This has a tendency to loop longer |
| 614 | * than the FIFO length (usually one block). |
| 615 | */ |
| 616 | while (!((fsr = inb(host->base + WBSD_FSR)) & WBSD_FIFO_FULL)) |
| 617 | { |
| 618 | /* |
| 619 | * The size field in the FSR is broken so we have to |
| 620 | * do some guessing. |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 621 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | if (fsr & WBSD_FIFO_EMPTY) |
| 623 | fifo = 0; |
| 624 | else if (fsr & WBSD_FIFO_EMTHRE) |
| 625 | fifo = 8; |
| 626 | else |
| 627 | fifo = 15; |
| 628 | |
| 629 | for (i = 16;i > fifo;i--) |
| 630 | { |
| 631 | outb(*buffer, host->base + WBSD_DFR); |
| 632 | buffer++; |
| 633 | host->offset++; |
| 634 | host->remain--; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 635 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | data->bytes_xfered++; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 637 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | /* |
| 639 | * Transfer done? |
| 640 | */ |
| 641 | if (data->bytes_xfered == host->size) |
| 642 | { |
| 643 | wbsd_kunmap_sg(host); |
| 644 | return; |
| 645 | } |
| 646 | |
| 647 | /* |
| 648 | * End of scatter list entry? |
| 649 | */ |
| 650 | if (host->remain == 0) |
| 651 | { |
| 652 | wbsd_kunmap_sg(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 654 | /* |
| 655 | * Get next entry. Check if last. |
| 656 | */ |
| 657 | if (!wbsd_next_sg(host)) |
| 658 | { |
| 659 | /* |
| 660 | * We should never reach this point. |
| 661 | * It means that we're trying to |
| 662 | * transfer more blocks than can fit |
| 663 | * into the scatter list. |
| 664 | */ |
| 665 | BUG_ON(1); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 666 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 667 | host->size = data->bytes_xfered; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | return; |
| 670 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | buffer = wbsd_kmap_sg(host); |
| 673 | } |
| 674 | } |
| 675 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 676 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | wbsd_kunmap_sg(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 678 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 679 | /* |
| 680 | * The controller stops sending interrupts for |
| 681 | * 'FIFO empty' under certain conditions. So we |
| 682 | * need to be a bit more pro-active. |
| 683 | */ |
| 684 | tasklet_schedule(&host->fifo_tasklet); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | } |
| 686 | |
| 687 | static void wbsd_prepare_data(struct wbsd_host* host, struct mmc_data* data) |
| 688 | { |
| 689 | u16 blksize; |
| 690 | u8 setup; |
| 691 | unsigned long dmaflags; |
| 692 | |
| 693 | DBGF("blksz %04x blks %04x flags %08x\n", |
| 694 | 1 << data->blksz_bits, data->blocks, data->flags); |
| 695 | DBGF("tsac %d ms nsac %d clk\n", |
| 696 | data->timeout_ns / 1000000, data->timeout_clks); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | /* |
| 699 | * Calculate size. |
| 700 | */ |
| 701 | host->size = data->blocks << data->blksz_bits; |
| 702 | |
| 703 | /* |
| 704 | * Check timeout values for overflow. |
| 705 | * (Yes, some cards cause this value to overflow). |
| 706 | */ |
| 707 | if (data->timeout_ns > 127000000) |
| 708 | wbsd_write_index(host, WBSD_IDX_TAAC, 127); |
| 709 | else |
| 710 | wbsd_write_index(host, WBSD_IDX_TAAC, data->timeout_ns/1000000); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 711 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | if (data->timeout_clks > 255) |
| 713 | wbsd_write_index(host, WBSD_IDX_NSAC, 255); |
| 714 | else |
| 715 | wbsd_write_index(host, WBSD_IDX_NSAC, data->timeout_clks); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 716 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | /* |
| 718 | * Inform the chip of how large blocks will be |
| 719 | * sent. It needs this to determine when to |
| 720 | * calculate CRC. |
| 721 | * |
| 722 | * Space for CRC must be included in the size. |
Pierre Ossman | 65ae211 | 2005-09-06 15:18:57 -0700 | [diff] [blame] | 723 | * Two bytes are needed for each data line. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | */ |
Pierre Ossman | 65ae211 | 2005-09-06 15:18:57 -0700 | [diff] [blame] | 725 | if (host->bus_width == MMC_BUS_WIDTH_1) |
| 726 | { |
| 727 | blksize = (1 << data->blksz_bits) + 2; |
| 728 | |
| 729 | wbsd_write_index(host, WBSD_IDX_PBSMSB, (blksize >> 4) & 0xF0); |
| 730 | wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); |
| 731 | } |
| 732 | else if (host->bus_width == MMC_BUS_WIDTH_4) |
| 733 | { |
| 734 | blksize = (1 << data->blksz_bits) + 2 * 4; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 735 | |
Pierre Ossman | 65ae211 | 2005-09-06 15:18:57 -0700 | [diff] [blame] | 736 | wbsd_write_index(host, WBSD_IDX_PBSMSB, ((blksize >> 4) & 0xF0) |
| 737 | | WBSD_DATA_WIDTH); |
| 738 | wbsd_write_index(host, WBSD_IDX_PBSLSB, blksize & 0xFF); |
| 739 | } |
| 740 | else |
| 741 | { |
| 742 | data->error = MMC_ERR_INVALID; |
| 743 | return; |
| 744 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
| 746 | /* |
| 747 | * Clear the FIFO. This is needed even for DMA |
| 748 | * transfers since the chip still uses the FIFO |
| 749 | * internally. |
| 750 | */ |
| 751 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); |
| 752 | setup |= WBSD_FIFO_RESET; |
| 753 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 754 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 755 | /* |
| 756 | * DMA transfer? |
| 757 | */ |
| 758 | if (host->dma >= 0) |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 759 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 760 | /* |
| 761 | * The buffer for DMA is only 64 kB. |
| 762 | */ |
| 763 | BUG_ON(host->size > 0x10000); |
| 764 | if (host->size > 0x10000) |
| 765 | { |
| 766 | data->error = MMC_ERR_INVALID; |
| 767 | return; |
| 768 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 769 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | /* |
| 771 | * Transfer data from the SG list to |
| 772 | * the DMA buffer. |
| 773 | */ |
| 774 | if (data->flags & MMC_DATA_WRITE) |
| 775 | wbsd_sg_to_dma(host, data); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 776 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 777 | /* |
| 778 | * Initialise the ISA DMA controller. |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 779 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | dmaflags = claim_dma_lock(); |
| 781 | disable_dma(host->dma); |
| 782 | clear_dma_ff(host->dma); |
| 783 | if (data->flags & MMC_DATA_READ) |
| 784 | set_dma_mode(host->dma, DMA_MODE_READ & ~0x40); |
| 785 | else |
| 786 | set_dma_mode(host->dma, DMA_MODE_WRITE & ~0x40); |
| 787 | set_dma_addr(host->dma, host->dma_addr); |
| 788 | set_dma_count(host->dma, host->size); |
| 789 | |
| 790 | enable_dma(host->dma); |
| 791 | release_dma_lock(dmaflags); |
| 792 | |
| 793 | /* |
| 794 | * Enable DMA on the host. |
| 795 | */ |
| 796 | wbsd_write_index(host, WBSD_IDX_DMA, WBSD_DMA_ENABLE); |
| 797 | } |
| 798 | else |
| 799 | { |
| 800 | /* |
| 801 | * This flag is used to keep printk |
| 802 | * output to a minimum. |
| 803 | */ |
| 804 | host->firsterr = 1; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | /* |
| 807 | * Initialise the SG list. |
| 808 | */ |
| 809 | wbsd_init_sg(host, data); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 810 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | /* |
| 812 | * Turn off DMA. |
| 813 | */ |
| 814 | wbsd_write_index(host, WBSD_IDX_DMA, 0); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | /* |
| 817 | * Set up FIFO threshold levels (and fill |
| 818 | * buffer if doing a write). |
| 819 | */ |
| 820 | if (data->flags & MMC_DATA_READ) |
| 821 | { |
| 822 | wbsd_write_index(host, WBSD_IDX_FIFOEN, |
| 823 | WBSD_FIFOEN_FULL | 8); |
| 824 | } |
| 825 | else |
| 826 | { |
| 827 | wbsd_write_index(host, WBSD_IDX_FIFOEN, |
| 828 | WBSD_FIFOEN_EMPTY | 8); |
| 829 | wbsd_fill_fifo(host); |
| 830 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 831 | } |
| 832 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | data->error = MMC_ERR_NONE; |
| 834 | } |
| 835 | |
| 836 | static void wbsd_finish_data(struct wbsd_host* host, struct mmc_data* data) |
| 837 | { |
| 838 | unsigned long dmaflags; |
| 839 | int count; |
| 840 | u8 status; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 841 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | WARN_ON(host->mrq == NULL); |
| 843 | |
| 844 | /* |
| 845 | * Send a stop command if needed. |
| 846 | */ |
| 847 | if (data->stop) |
| 848 | wbsd_send_command(host, data->stop); |
| 849 | |
| 850 | /* |
| 851 | * Wait for the controller to leave data |
| 852 | * transfer state. |
| 853 | */ |
| 854 | do |
| 855 | { |
| 856 | status = wbsd_read_index(host, WBSD_IDX_STATUS); |
| 857 | } while (status & (WBSD_BLOCK_READ | WBSD_BLOCK_WRITE)); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 858 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | /* |
| 860 | * DMA transfer? |
| 861 | */ |
| 862 | if (host->dma >= 0) |
| 863 | { |
| 864 | /* |
| 865 | * Disable DMA on the host. |
| 866 | */ |
| 867 | wbsd_write_index(host, WBSD_IDX_DMA, 0); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 868 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | /* |
| 870 | * Turn of ISA DMA controller. |
| 871 | */ |
| 872 | dmaflags = claim_dma_lock(); |
| 873 | disable_dma(host->dma); |
| 874 | clear_dma_ff(host->dma); |
| 875 | count = get_dma_residue(host->dma); |
| 876 | release_dma_lock(dmaflags); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 877 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | /* |
| 879 | * Any leftover data? |
| 880 | */ |
| 881 | if (count) |
| 882 | { |
| 883 | printk(KERN_ERR DRIVER_NAME ": Incomplete DMA " |
| 884 | "transfer. %d bytes left.\n", count); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 885 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | data->error = MMC_ERR_FAILED; |
| 887 | } |
| 888 | else |
| 889 | { |
| 890 | /* |
| 891 | * Transfer data from DMA buffer to |
| 892 | * SG list. |
| 893 | */ |
| 894 | if (data->flags & MMC_DATA_READ) |
| 895 | wbsd_dma_to_sg(host, data); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 896 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | data->bytes_xfered = host->size; |
| 898 | } |
| 899 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | DBGF("Ending data transfer (%d bytes)\n", data->bytes_xfered); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 902 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | wbsd_request_end(host, host->mrq); |
| 904 | } |
| 905 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 906 | /*****************************************************************************\ |
| 907 | * * |
| 908 | * MMC layer callbacks * |
| 909 | * * |
| 910 | \*****************************************************************************/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | |
| 912 | static void wbsd_request(struct mmc_host* mmc, struct mmc_request* mrq) |
| 913 | { |
| 914 | struct wbsd_host* host = mmc_priv(mmc); |
| 915 | struct mmc_command* cmd; |
| 916 | |
| 917 | /* |
| 918 | * Disable tasklets to avoid a deadlock. |
| 919 | */ |
| 920 | spin_lock_bh(&host->lock); |
| 921 | |
| 922 | BUG_ON(host->mrq != NULL); |
| 923 | |
| 924 | cmd = mrq->cmd; |
| 925 | |
| 926 | host->mrq = mrq; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 927 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | /* |
| 929 | * If there is no card in the slot then |
| 930 | * timeout immediatly. |
| 931 | */ |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 932 | if (!(host->flags & WBSD_FCARD_PRESENT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | { |
| 934 | cmd->error = MMC_ERR_TIMEOUT; |
| 935 | goto done; |
| 936 | } |
| 937 | |
| 938 | /* |
| 939 | * Does the request include data? |
| 940 | */ |
| 941 | if (cmd->data) |
| 942 | { |
| 943 | wbsd_prepare_data(host, cmd->data); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 944 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | if (cmd->data->error != MMC_ERR_NONE) |
| 946 | goto done; |
| 947 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 948 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | wbsd_send_command(host, cmd); |
| 950 | |
| 951 | /* |
| 952 | * If this is a data transfer the request |
| 953 | * will be finished after the data has |
| 954 | * transfered. |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 955 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | if (cmd->data && (cmd->error == MMC_ERR_NONE)) |
| 957 | { |
| 958 | /* |
| 959 | * Dirty fix for hardware bug. |
| 960 | */ |
| 961 | if (host->dma == -1) |
| 962 | tasklet_schedule(&host->fifo_tasklet); |
| 963 | |
| 964 | spin_unlock_bh(&host->lock); |
| 965 | |
| 966 | return; |
| 967 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 968 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | done: |
| 970 | wbsd_request_end(host, mrq); |
| 971 | |
| 972 | spin_unlock_bh(&host->lock); |
| 973 | } |
| 974 | |
| 975 | static void wbsd_set_ios(struct mmc_host* mmc, struct mmc_ios* ios) |
| 976 | { |
| 977 | struct wbsd_host* host = mmc_priv(mmc); |
| 978 | u8 clk, setup, pwr; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 979 | |
Pierre Ossman | 65ae211 | 2005-09-06 15:18:57 -0700 | [diff] [blame] | 980 | DBGF("clock %uHz busmode %u powermode %u cs %u Vdd %u width %u\n", |
| 981 | ios->clock, ios->bus_mode, ios->power_mode, ios->chip_select, |
| 982 | ios->vdd, ios->bus_width); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | |
| 984 | spin_lock_bh(&host->lock); |
| 985 | |
| 986 | /* |
| 987 | * Reset the chip on each power off. |
| 988 | * Should clear out any weird states. |
| 989 | */ |
| 990 | if (ios->power_mode == MMC_POWER_OFF) |
| 991 | wbsd_init_device(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 992 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | if (ios->clock >= 24000000) |
| 994 | clk = WBSD_CLK_24M; |
| 995 | else if (ios->clock >= 16000000) |
| 996 | clk = WBSD_CLK_16M; |
| 997 | else if (ios->clock >= 12000000) |
| 998 | clk = WBSD_CLK_12M; |
| 999 | else |
| 1000 | clk = WBSD_CLK_375K; |
| 1001 | |
| 1002 | /* |
| 1003 | * Only write to the clock register when |
| 1004 | * there is an actual change. |
| 1005 | */ |
| 1006 | if (clk != host->clk) |
| 1007 | { |
| 1008 | wbsd_write_index(host, WBSD_IDX_CLK, clk); |
| 1009 | host->clk = clk; |
| 1010 | } |
| 1011 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1012 | /* |
| 1013 | * Power up card. |
| 1014 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | if (ios->power_mode != MMC_POWER_OFF) |
| 1016 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | pwr = inb(host->base + WBSD_CSR); |
| 1018 | pwr &= ~WBSD_POWER_N; |
| 1019 | outb(pwr, host->base + WBSD_CSR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | } |
| 1021 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1022 | /* |
| 1023 | * MMC cards need to have pin 1 high during init. |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1024 | * It wreaks havoc with the card detection though so |
Pierre Ossman | 1656fa5 | 2005-09-03 16:45:49 +0100 | [diff] [blame] | 1025 | * that needs to be disabled. |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1026 | */ |
| 1027 | setup = wbsd_read_index(host, WBSD_IDX_SETUP); |
Pierre Ossman | 1656fa5 | 2005-09-03 16:45:49 +0100 | [diff] [blame] | 1028 | if (ios->chip_select == MMC_CS_HIGH) |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1029 | { |
Pierre Ossman | 65ae211 | 2005-09-06 15:18:57 -0700 | [diff] [blame] | 1030 | BUG_ON(ios->bus_width != MMC_BUS_WIDTH_1); |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1031 | setup |= WBSD_DAT3_H; |
| 1032 | host->flags |= WBSD_FIGNORE_DETECT; |
| 1033 | } |
| 1034 | else |
| 1035 | { |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1036 | if (setup & WBSD_DAT3_H) |
| 1037 | { |
| 1038 | setup &= ~WBSD_DAT3_H; |
Pierre Ossman | 1656fa5 | 2005-09-03 16:45:49 +0100 | [diff] [blame] | 1039 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1040 | /* |
| 1041 | * We cannot resume card detection immediatly |
| 1042 | * because of capacitance and delays in the chip. |
| 1043 | */ |
| 1044 | mod_timer(&host->ignore_timer, jiffies + HZ/100); |
| 1045 | } |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1046 | } |
| 1047 | wbsd_write_index(host, WBSD_IDX_SETUP, setup); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1048 | |
Pierre Ossman | 65ae211 | 2005-09-06 15:18:57 -0700 | [diff] [blame] | 1049 | /* |
| 1050 | * Store bus width for later. Will be used when |
| 1051 | * setting up the data transfer. |
| 1052 | */ |
| 1053 | host->bus_width = ios->bus_width; |
| 1054 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1055 | spin_unlock_bh(&host->lock); |
| 1056 | } |
| 1057 | |
Pierre Ossman | 65ae211 | 2005-09-06 15:18:57 -0700 | [diff] [blame] | 1058 | static int wbsd_get_ro(struct mmc_host* mmc) |
| 1059 | { |
| 1060 | struct wbsd_host* host = mmc_priv(mmc); |
| 1061 | u8 csr; |
| 1062 | |
| 1063 | spin_lock_bh(&host->lock); |
| 1064 | |
| 1065 | csr = inb(host->base + WBSD_CSR); |
| 1066 | csr |= WBSD_MSLED; |
| 1067 | outb(csr, host->base + WBSD_CSR); |
| 1068 | |
| 1069 | mdelay(1); |
| 1070 | |
| 1071 | csr = inb(host->base + WBSD_CSR); |
| 1072 | csr &= ~WBSD_MSLED; |
| 1073 | outb(csr, host->base + WBSD_CSR); |
| 1074 | |
| 1075 | spin_unlock_bh(&host->lock); |
| 1076 | |
| 1077 | return csr & WBSD_WRPT; |
| 1078 | } |
| 1079 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1080 | static struct mmc_host_ops wbsd_ops = { |
| 1081 | .request = wbsd_request, |
| 1082 | .set_ios = wbsd_set_ios, |
Pierre Ossman | 65ae211 | 2005-09-06 15:18:57 -0700 | [diff] [blame] | 1083 | .get_ro = wbsd_get_ro, |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1084 | }; |
| 1085 | |
| 1086 | /*****************************************************************************\ |
| 1087 | * * |
| 1088 | * Interrupt handling * |
| 1089 | * * |
| 1090 | \*****************************************************************************/ |
| 1091 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1092 | /* |
Pierre Ossman | 1656fa5 | 2005-09-03 16:45:49 +0100 | [diff] [blame] | 1093 | * Helper function to reset detection ignore |
| 1094 | */ |
| 1095 | |
| 1096 | static void wbsd_reset_ignore(unsigned long data) |
| 1097 | { |
| 1098 | struct wbsd_host *host = (struct wbsd_host*)data; |
| 1099 | |
| 1100 | BUG_ON(host == NULL); |
| 1101 | |
| 1102 | DBG("Resetting card detection ignore\n"); |
| 1103 | |
| 1104 | spin_lock_bh(&host->lock); |
| 1105 | |
| 1106 | host->flags &= ~WBSD_FIGNORE_DETECT; |
| 1107 | |
| 1108 | /* |
| 1109 | * Card status might have changed during the |
| 1110 | * blackout. |
| 1111 | */ |
| 1112 | tasklet_schedule(&host->card_tasklet); |
| 1113 | |
| 1114 | spin_unlock_bh(&host->lock); |
| 1115 | } |
| 1116 | |
| 1117 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1118 | * Tasklets |
| 1119 | */ |
| 1120 | |
Jesper Juhl | 77933d7 | 2005-07-27 11:46:09 -0700 | [diff] [blame] | 1121 | static inline struct mmc_data* wbsd_get_data(struct wbsd_host* host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | { |
| 1123 | WARN_ON(!host->mrq); |
| 1124 | if (!host->mrq) |
| 1125 | return NULL; |
| 1126 | |
| 1127 | WARN_ON(!host->mrq->cmd); |
| 1128 | if (!host->mrq->cmd) |
| 1129 | return NULL; |
| 1130 | |
| 1131 | WARN_ON(!host->mrq->cmd->data); |
| 1132 | if (!host->mrq->cmd->data) |
| 1133 | return NULL; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1134 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | return host->mrq->cmd->data; |
| 1136 | } |
| 1137 | |
| 1138 | static void wbsd_tasklet_card(unsigned long param) |
| 1139 | { |
| 1140 | struct wbsd_host* host = (struct wbsd_host*)param; |
| 1141 | u8 csr; |
Pierre Ossman | 210ce2a | 2005-09-12 20:36:19 +0100 | [diff] [blame] | 1142 | int delay = -1; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | spin_lock(&host->lock); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1145 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1146 | if (host->flags & WBSD_FIGNORE_DETECT) |
| 1147 | { |
| 1148 | spin_unlock(&host->lock); |
| 1149 | return; |
| 1150 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | csr = inb(host->base + WBSD_CSR); |
| 1153 | WARN_ON(csr == 0xff); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | if (csr & WBSD_CARDPRESENT) |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1156 | { |
| 1157 | if (!(host->flags & WBSD_FCARD_PRESENT)) |
| 1158 | { |
| 1159 | DBG("Card inserted\n"); |
| 1160 | host->flags |= WBSD_FCARD_PRESENT; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1161 | |
Pierre Ossman | 210ce2a | 2005-09-12 20:36:19 +0100 | [diff] [blame] | 1162 | delay = 500; |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1163 | } |
| 1164 | } |
| 1165 | else if (host->flags & WBSD_FCARD_PRESENT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | { |
| 1167 | DBG("Card removed\n"); |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1168 | host->flags &= ~WBSD_FCARD_PRESENT; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | if (host->mrq) |
| 1171 | { |
| 1172 | printk(KERN_ERR DRIVER_NAME |
| 1173 | ": Card removed during transfer!\n"); |
| 1174 | wbsd_reset(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | host->mrq->cmd->error = MMC_ERR_FAILED; |
| 1177 | tasklet_schedule(&host->finish_tasklet); |
| 1178 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1179 | |
Pierre Ossman | 210ce2a | 2005-09-12 20:36:19 +0100 | [diff] [blame] | 1180 | delay = 0; |
Pierre Ossman | 6e6293d | 2005-07-01 12:13:55 +0100 | [diff] [blame] | 1181 | } |
Pierre Ossman | 210ce2a | 2005-09-12 20:36:19 +0100 | [diff] [blame] | 1182 | |
| 1183 | /* |
| 1184 | * Unlock first since we might get a call back. |
| 1185 | */ |
| 1186 | |
| 1187 | spin_unlock(&host->lock); |
| 1188 | |
| 1189 | if (delay != -1) |
| 1190 | mmc_detect_change(host->mmc, msecs_to_jiffies(delay)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1191 | } |
| 1192 | |
| 1193 | static void wbsd_tasklet_fifo(unsigned long param) |
| 1194 | { |
| 1195 | struct wbsd_host* host = (struct wbsd_host*)param; |
| 1196 | struct mmc_data* data; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1197 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | spin_lock(&host->lock); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | if (!host->mrq) |
| 1201 | goto end; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1202 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | data = wbsd_get_data(host); |
| 1204 | if (!data) |
| 1205 | goto end; |
| 1206 | |
| 1207 | if (data->flags & MMC_DATA_WRITE) |
| 1208 | wbsd_fill_fifo(host); |
| 1209 | else |
| 1210 | wbsd_empty_fifo(host); |
| 1211 | |
| 1212 | /* |
| 1213 | * Done? |
| 1214 | */ |
| 1215 | if (host->size == data->bytes_xfered) |
| 1216 | { |
| 1217 | wbsd_write_index(host, WBSD_IDX_FIFOEN, 0); |
| 1218 | tasklet_schedule(&host->finish_tasklet); |
| 1219 | } |
| 1220 | |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1221 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | spin_unlock(&host->lock); |
| 1223 | } |
| 1224 | |
| 1225 | static void wbsd_tasklet_crc(unsigned long param) |
| 1226 | { |
| 1227 | struct wbsd_host* host = (struct wbsd_host*)param; |
| 1228 | struct mmc_data* data; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | spin_lock(&host->lock); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1231 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1232 | if (!host->mrq) |
| 1233 | goto end; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1234 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1235 | data = wbsd_get_data(host); |
| 1236 | if (!data) |
| 1237 | goto end; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1239 | DBGF("CRC error\n"); |
| 1240 | |
| 1241 | data->error = MMC_ERR_BADCRC; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | tasklet_schedule(&host->finish_tasklet); |
| 1244 | |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1245 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1246 | spin_unlock(&host->lock); |
| 1247 | } |
| 1248 | |
| 1249 | static void wbsd_tasklet_timeout(unsigned long param) |
| 1250 | { |
| 1251 | struct wbsd_host* host = (struct wbsd_host*)param; |
| 1252 | struct mmc_data* data; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1253 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | spin_lock(&host->lock); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1255 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | if (!host->mrq) |
| 1257 | goto end; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | data = wbsd_get_data(host); |
| 1260 | if (!data) |
| 1261 | goto end; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1262 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | DBGF("Timeout\n"); |
| 1264 | |
| 1265 | data->error = MMC_ERR_TIMEOUT; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1266 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | tasklet_schedule(&host->finish_tasklet); |
| 1268 | |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1269 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | spin_unlock(&host->lock); |
| 1271 | } |
| 1272 | |
| 1273 | static void wbsd_tasklet_finish(unsigned long param) |
| 1274 | { |
| 1275 | struct wbsd_host* host = (struct wbsd_host*)param; |
| 1276 | struct mmc_data* data; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1277 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | spin_lock(&host->lock); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | WARN_ON(!host->mrq); |
| 1281 | if (!host->mrq) |
| 1282 | goto end; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | data = wbsd_get_data(host); |
| 1285 | if (!data) |
| 1286 | goto end; |
| 1287 | |
| 1288 | wbsd_finish_data(host, data); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1289 | |
| 1290 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | spin_unlock(&host->lock); |
| 1292 | } |
| 1293 | |
| 1294 | static void wbsd_tasklet_block(unsigned long param) |
| 1295 | { |
| 1296 | struct wbsd_host* host = (struct wbsd_host*)param; |
| 1297 | struct mmc_data* data; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1298 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | spin_lock(&host->lock); |
| 1300 | |
| 1301 | if ((wbsd_read_index(host, WBSD_IDX_CRCSTATUS) & WBSD_CRC_MASK) != |
| 1302 | WBSD_CRC_OK) |
| 1303 | { |
| 1304 | data = wbsd_get_data(host); |
| 1305 | if (!data) |
| 1306 | goto end; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | DBGF("CRC error\n"); |
| 1309 | |
| 1310 | data->error = MMC_ERR_BADCRC; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | tasklet_schedule(&host->finish_tasklet); |
| 1313 | } |
| 1314 | |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1315 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | spin_unlock(&host->lock); |
| 1317 | } |
| 1318 | |
| 1319 | /* |
| 1320 | * Interrupt handling |
| 1321 | */ |
| 1322 | |
| 1323 | static irqreturn_t wbsd_irq(int irq, void *dev_id, struct pt_regs *regs) |
| 1324 | { |
| 1325 | struct wbsd_host* host = dev_id; |
| 1326 | int isr; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | isr = inb(host->base + WBSD_ISR); |
| 1329 | |
| 1330 | /* |
| 1331 | * Was it actually our hardware that caused the interrupt? |
| 1332 | */ |
| 1333 | if (isr == 0xff || isr == 0x00) |
| 1334 | return IRQ_NONE; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1335 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | host->isr |= isr; |
| 1337 | |
| 1338 | /* |
| 1339 | * Schedule tasklets as needed. |
| 1340 | */ |
| 1341 | if (isr & WBSD_INT_CARD) |
| 1342 | tasklet_schedule(&host->card_tasklet); |
| 1343 | if (isr & WBSD_INT_FIFO_THRE) |
| 1344 | tasklet_schedule(&host->fifo_tasklet); |
| 1345 | if (isr & WBSD_INT_CRC) |
| 1346 | tasklet_hi_schedule(&host->crc_tasklet); |
| 1347 | if (isr & WBSD_INT_TIMEOUT) |
| 1348 | tasklet_hi_schedule(&host->timeout_tasklet); |
| 1349 | if (isr & WBSD_INT_BUSYEND) |
| 1350 | tasklet_hi_schedule(&host->block_tasklet); |
| 1351 | if (isr & WBSD_INT_TC) |
| 1352 | tasklet_schedule(&host->finish_tasklet); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | return IRQ_HANDLED; |
| 1355 | } |
| 1356 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1357 | /*****************************************************************************\ |
| 1358 | * * |
| 1359 | * Device initialisation and shutdown * |
| 1360 | * * |
| 1361 | \*****************************************************************************/ |
| 1362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | /* |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1364 | * Allocate/free MMC structure. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | */ |
| 1366 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1367 | static int __devinit wbsd_alloc_mmc(struct device* dev) |
| 1368 | { |
| 1369 | struct mmc_host* mmc; |
| 1370 | struct wbsd_host* host; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1371 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1372 | /* |
| 1373 | * Allocate MMC structure. |
| 1374 | */ |
| 1375 | mmc = mmc_alloc_host(sizeof(struct wbsd_host), dev); |
| 1376 | if (!mmc) |
| 1377 | return -ENOMEM; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1378 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1379 | host = mmc_priv(mmc); |
| 1380 | host->mmc = mmc; |
| 1381 | |
| 1382 | host->dma = -1; |
| 1383 | |
| 1384 | /* |
| 1385 | * Set host parameters. |
| 1386 | */ |
| 1387 | mmc->ops = &wbsd_ops; |
| 1388 | mmc->f_min = 375000; |
| 1389 | mmc->f_max = 24000000; |
| 1390 | mmc->ocr_avail = MMC_VDD_32_33|MMC_VDD_33_34; |
Pierre Ossman | 65ae211 | 2005-09-06 15:18:57 -0700 | [diff] [blame] | 1391 | mmc->caps = MMC_CAP_4_BIT_DATA; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1392 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1393 | spin_lock_init(&host->lock); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1394 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1395 | /* |
Pierre Ossman | 1656fa5 | 2005-09-03 16:45:49 +0100 | [diff] [blame] | 1396 | * Set up timers |
Pierre Ossman | 6e6293d | 2005-07-01 12:13:55 +0100 | [diff] [blame] | 1397 | */ |
Pierre Ossman | 1656fa5 | 2005-09-03 16:45:49 +0100 | [diff] [blame] | 1398 | init_timer(&host->ignore_timer); |
| 1399 | host->ignore_timer.data = (unsigned long)host; |
| 1400 | host->ignore_timer.function = wbsd_reset_ignore; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1401 | |
Pierre Ossman | 6e6293d | 2005-07-01 12:13:55 +0100 | [diff] [blame] | 1402 | /* |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1403 | * Maximum number of segments. Worst case is one sector per segment |
| 1404 | * so this will be 64kB/512. |
| 1405 | */ |
| 1406 | mmc->max_hw_segs = 128; |
| 1407 | mmc->max_phys_segs = 128; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1408 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1409 | /* |
| 1410 | * Maximum number of sectors in one transfer. Also limited by 64kB |
| 1411 | * buffer. |
| 1412 | */ |
| 1413 | mmc->max_sectors = 128; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1414 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1415 | /* |
| 1416 | * Maximum segment size. Could be one segment with the maximum number |
| 1417 | * of segments. |
| 1418 | */ |
| 1419 | mmc->max_seg_size = mmc->max_sectors * 512; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1420 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1421 | dev_set_drvdata(dev, mmc); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1422 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1423 | return 0; |
| 1424 | } |
| 1425 | |
| 1426 | static void __devexit wbsd_free_mmc(struct device* dev) |
| 1427 | { |
| 1428 | struct mmc_host* mmc; |
Pierre Ossman | 6e6293d | 2005-07-01 12:13:55 +0100 | [diff] [blame] | 1429 | struct wbsd_host* host; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1430 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1431 | mmc = dev_get_drvdata(dev); |
| 1432 | if (!mmc) |
| 1433 | return; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1434 | |
Pierre Ossman | 6e6293d | 2005-07-01 12:13:55 +0100 | [diff] [blame] | 1435 | host = mmc_priv(mmc); |
| 1436 | BUG_ON(host == NULL); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1437 | |
Pierre Ossman | 1656fa5 | 2005-09-03 16:45:49 +0100 | [diff] [blame] | 1438 | del_timer_sync(&host->ignore_timer); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1439 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1440 | mmc_free_host(mmc); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1441 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1442 | dev_set_drvdata(dev, NULL); |
| 1443 | } |
| 1444 | |
| 1445 | /* |
| 1446 | * Scan for known chip id:s |
| 1447 | */ |
| 1448 | |
| 1449 | static int __devinit wbsd_scan(struct wbsd_host* host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | { |
| 1451 | int i, j, k; |
| 1452 | int id; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1453 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | /* |
| 1455 | * Iterate through all ports, all codes to |
| 1456 | * find hardware that is in our known list. |
| 1457 | */ |
| 1458 | for (i = 0;i < sizeof(config_ports)/sizeof(int);i++) |
| 1459 | { |
| 1460 | if (!request_region(config_ports[i], 2, DRIVER_NAME)) |
| 1461 | continue; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1462 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | for (j = 0;j < sizeof(unlock_codes)/sizeof(int);j++) |
| 1464 | { |
| 1465 | id = 0xFFFF; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1466 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1467 | host->config = config_ports[i]; |
| 1468 | host->unlock_code = unlock_codes[j]; |
| 1469 | |
| 1470 | wbsd_unlock_config(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1472 | outb(WBSD_CONF_ID_HI, config_ports[i]); |
| 1473 | id = inb(config_ports[i] + 1) << 8; |
| 1474 | |
| 1475 | outb(WBSD_CONF_ID_LO, config_ports[i]); |
| 1476 | id |= inb(config_ports[i] + 1); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1477 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1478 | wbsd_lock_config(host); |
| 1479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1480 | for (k = 0;k < sizeof(valid_ids)/sizeof(int);k++) |
| 1481 | { |
| 1482 | if (id == valid_ids[k]) |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1483 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1484 | host->chip_id = id; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1485 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | return 0; |
| 1487 | } |
| 1488 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1489 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | if (id != 0xFFFF) |
| 1491 | { |
| 1492 | DBG("Unknown hardware (id %x) found at %x\n", |
| 1493 | id, config_ports[i]); |
| 1494 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1496 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | release_region(config_ports[i], 2); |
| 1498 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1499 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1500 | host->config = 0; |
| 1501 | host->unlock_code = 0; |
| 1502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1503 | return -ENODEV; |
| 1504 | } |
| 1505 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1506 | /* |
| 1507 | * Allocate/free io port ranges |
| 1508 | */ |
| 1509 | |
| 1510 | static int __devinit wbsd_request_region(struct wbsd_host* host, int base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | { |
| 1512 | if (io & 0x7) |
| 1513 | return -EINVAL; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1514 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1515 | if (!request_region(base, 8, DRIVER_NAME)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | return -EIO; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1518 | host->base = io; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | return 0; |
| 1521 | } |
| 1522 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1523 | static void __devexit wbsd_release_regions(struct wbsd_host* host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | { |
| 1525 | if (host->base) |
| 1526 | release_region(host->base, 8); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1527 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1528 | host->base = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | |
| 1530 | if (host->config) |
| 1531 | release_region(host->config, 2); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1532 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1533 | host->config = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | } |
| 1535 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1536 | /* |
| 1537 | * Allocate/free DMA port and buffer |
| 1538 | */ |
| 1539 | |
| 1540 | static void __devinit wbsd_request_dma(struct wbsd_host* host, int dma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | if (dma < 0) |
| 1543 | return; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | if (request_dma(dma, DRIVER_NAME)) |
| 1546 | goto err; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1547 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1548 | /* |
| 1549 | * We need to allocate a special buffer in |
| 1550 | * order for ISA to be able to DMA to it. |
| 1551 | */ |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1552 | host->dma_buffer = kmalloc(WBSD_DMA_SIZE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1553 | GFP_NOIO | GFP_DMA | __GFP_REPEAT | __GFP_NOWARN); |
| 1554 | if (!host->dma_buffer) |
| 1555 | goto free; |
| 1556 | |
| 1557 | /* |
| 1558 | * Translate the address to a physical address. |
| 1559 | */ |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1560 | host->dma_addr = dma_map_single(host->mmc->dev, host->dma_buffer, |
| 1561 | WBSD_DMA_SIZE, DMA_BIDIRECTIONAL); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1563 | /* |
| 1564 | * ISA DMA must be aligned on a 64k basis. |
| 1565 | */ |
| 1566 | if ((host->dma_addr & 0xffff) != 0) |
| 1567 | goto kfree; |
| 1568 | /* |
| 1569 | * ISA cannot access memory above 16 MB. |
| 1570 | */ |
| 1571 | else if (host->dma_addr >= 0x1000000) |
| 1572 | goto kfree; |
| 1573 | |
| 1574 | host->dma = dma; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | return; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1577 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | kfree: |
| 1579 | /* |
| 1580 | * If we've gotten here then there is some kind of alignment bug |
| 1581 | */ |
| 1582 | BUG_ON(1); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1583 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1584 | dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE, |
| 1585 | DMA_BIDIRECTIONAL); |
| 1586 | host->dma_addr = (dma_addr_t)NULL; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | kfree(host->dma_buffer); |
| 1589 | host->dma_buffer = NULL; |
| 1590 | |
| 1591 | free: |
| 1592 | free_dma(dma); |
| 1593 | |
| 1594 | err: |
| 1595 | printk(KERN_WARNING DRIVER_NAME ": Unable to allocate DMA %d. " |
| 1596 | "Falling back on FIFO.\n", dma); |
| 1597 | } |
| 1598 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1599 | static void __devexit wbsd_release_dma(struct wbsd_host* host) |
| 1600 | { |
| 1601 | if (host->dma_addr) |
| 1602 | dma_unmap_single(host->mmc->dev, host->dma_addr, WBSD_DMA_SIZE, |
| 1603 | DMA_BIDIRECTIONAL); |
| 1604 | if (host->dma_buffer) |
| 1605 | kfree(host->dma_buffer); |
| 1606 | if (host->dma >= 0) |
| 1607 | free_dma(host->dma); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1608 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1609 | host->dma = -1; |
| 1610 | host->dma_buffer = NULL; |
| 1611 | host->dma_addr = (dma_addr_t)NULL; |
| 1612 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | |
| 1614 | /* |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1615 | * Allocate/free IRQ. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | */ |
| 1617 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1618 | static int __devinit wbsd_request_irq(struct wbsd_host* host, int irq) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | int ret; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1621 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1623 | * Allocate interrupt. |
| 1624 | */ |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1625 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1626 | ret = request_irq(irq, wbsd_irq, SA_SHIRQ, DRIVER_NAME, host); |
| 1627 | if (ret) |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1628 | return ret; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1629 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | host->irq = irq; |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1631 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | /* |
| 1633 | * Set up tasklets. |
| 1634 | */ |
| 1635 | tasklet_init(&host->card_tasklet, wbsd_tasklet_card, (unsigned long)host); |
| 1636 | tasklet_init(&host->fifo_tasklet, wbsd_tasklet_fifo, (unsigned long)host); |
| 1637 | tasklet_init(&host->crc_tasklet, wbsd_tasklet_crc, (unsigned long)host); |
| 1638 | tasklet_init(&host->timeout_tasklet, wbsd_tasklet_timeout, (unsigned long)host); |
| 1639 | tasklet_init(&host->finish_tasklet, wbsd_tasklet_finish, (unsigned long)host); |
| 1640 | tasklet_init(&host->block_tasklet, wbsd_tasklet_block, (unsigned long)host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1641 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | } |
| 1644 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1645 | static void __devexit wbsd_release_irq(struct wbsd_host* host) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | { |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1647 | if (!host->irq) |
| 1648 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | |
| 1650 | free_irq(host->irq, host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1651 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1652 | host->irq = 0; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1653 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | tasklet_kill(&host->card_tasklet); |
| 1655 | tasklet_kill(&host->fifo_tasklet); |
| 1656 | tasklet_kill(&host->crc_tasklet); |
| 1657 | tasklet_kill(&host->timeout_tasklet); |
| 1658 | tasklet_kill(&host->finish_tasklet); |
| 1659 | tasklet_kill(&host->block_tasklet); |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1660 | } |
| 1661 | |
| 1662 | /* |
| 1663 | * Allocate all resources for the host. |
| 1664 | */ |
| 1665 | |
| 1666 | static int __devinit wbsd_request_resources(struct wbsd_host* host, |
| 1667 | int base, int irq, int dma) |
| 1668 | { |
| 1669 | int ret; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1670 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1671 | /* |
| 1672 | * Allocate I/O ports. |
| 1673 | */ |
| 1674 | ret = wbsd_request_region(host, base); |
| 1675 | if (ret) |
| 1676 | return ret; |
| 1677 | |
| 1678 | /* |
| 1679 | * Allocate interrupt. |
| 1680 | */ |
| 1681 | ret = wbsd_request_irq(host, irq); |
| 1682 | if (ret) |
| 1683 | return ret; |
| 1684 | |
| 1685 | /* |
| 1686 | * Allocate DMA. |
| 1687 | */ |
| 1688 | wbsd_request_dma(host, dma); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1689 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1690 | return 0; |
| 1691 | } |
| 1692 | |
| 1693 | /* |
| 1694 | * Release all resources for the host. |
| 1695 | */ |
| 1696 | |
| 1697 | static void __devexit wbsd_release_resources(struct wbsd_host* host) |
| 1698 | { |
| 1699 | wbsd_release_dma(host); |
| 1700 | wbsd_release_irq(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | wbsd_release_regions(host); |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1702 | } |
| 1703 | |
| 1704 | /* |
| 1705 | * Configure the resources the chip should use. |
| 1706 | */ |
| 1707 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1708 | static void wbsd_chip_config(struct wbsd_host* host) |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1709 | { |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1710 | wbsd_unlock_config(host); |
| 1711 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1712 | /* |
| 1713 | * Reset the chip. |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1714 | */ |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1715 | wbsd_write_config(host, WBSD_CONF_SWRST, 1); |
| 1716 | wbsd_write_config(host, WBSD_CONF_SWRST, 0); |
| 1717 | |
| 1718 | /* |
| 1719 | * Select SD/MMC function. |
| 1720 | */ |
| 1721 | wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1722 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1723 | /* |
| 1724 | * Set up card detection. |
| 1725 | */ |
| 1726 | wbsd_write_config(host, WBSD_CONF_PINS, WBSD_PINS_DETECT_GP11); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1727 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1728 | /* |
| 1729 | * Configure chip |
| 1730 | */ |
| 1731 | wbsd_write_config(host, WBSD_CONF_PORT_HI, host->base >> 8); |
| 1732 | wbsd_write_config(host, WBSD_CONF_PORT_LO, host->base & 0xff); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1733 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1734 | wbsd_write_config(host, WBSD_CONF_IRQ, host->irq); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1735 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1736 | if (host->dma >= 0) |
| 1737 | wbsd_write_config(host, WBSD_CONF_DRQ, host->dma); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1738 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1739 | /* |
| 1740 | * Enable and power up chip. |
| 1741 | */ |
| 1742 | wbsd_write_config(host, WBSD_CONF_ENABLE, 1); |
| 1743 | wbsd_write_config(host, WBSD_CONF_POWER, 0x20); |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1744 | |
| 1745 | wbsd_lock_config(host); |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1746 | } |
| 1747 | |
| 1748 | /* |
| 1749 | * Check that configured resources are correct. |
| 1750 | */ |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1751 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1752 | static int wbsd_chip_validate(struct wbsd_host* host) |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1753 | { |
| 1754 | int base, irq, dma; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1755 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1756 | wbsd_unlock_config(host); |
| 1757 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1758 | /* |
| 1759 | * Select SD/MMC function. |
| 1760 | */ |
| 1761 | wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1762 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1763 | /* |
| 1764 | * Read configuration. |
| 1765 | */ |
| 1766 | base = wbsd_read_config(host, WBSD_CONF_PORT_HI) << 8; |
| 1767 | base |= wbsd_read_config(host, WBSD_CONF_PORT_LO); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1768 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1769 | irq = wbsd_read_config(host, WBSD_CONF_IRQ); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1770 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1771 | dma = wbsd_read_config(host, WBSD_CONF_DRQ); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1772 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1773 | wbsd_lock_config(host); |
| 1774 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1775 | /* |
| 1776 | * Validate against given configuration. |
| 1777 | */ |
| 1778 | if (base != host->base) |
| 1779 | return 0; |
| 1780 | if (irq != host->irq) |
| 1781 | return 0; |
| 1782 | if ((dma != host->dma) && (host->dma != -1)) |
| 1783 | return 0; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1784 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1785 | return 1; |
| 1786 | } |
| 1787 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1788 | /* |
| 1789 | * Powers down the SD function |
| 1790 | */ |
| 1791 | |
| 1792 | static void wbsd_chip_poweroff(struct wbsd_host* host) |
| 1793 | { |
| 1794 | wbsd_unlock_config(host); |
| 1795 | |
| 1796 | wbsd_write_config(host, WBSD_CONF_DEVICE, DEVICE_SD); |
| 1797 | wbsd_write_config(host, WBSD_CONF_ENABLE, 0); |
| 1798 | |
| 1799 | wbsd_lock_config(host); |
| 1800 | } |
| 1801 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1802 | /*****************************************************************************\ |
| 1803 | * * |
| 1804 | * Devices setup and shutdown * |
| 1805 | * * |
| 1806 | \*****************************************************************************/ |
| 1807 | |
| 1808 | static int __devinit wbsd_init(struct device* dev, int base, int irq, int dma, |
| 1809 | int pnp) |
| 1810 | { |
| 1811 | struct wbsd_host* host = NULL; |
| 1812 | struct mmc_host* mmc = NULL; |
| 1813 | int ret; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1814 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1815 | ret = wbsd_alloc_mmc(dev); |
| 1816 | if (ret) |
| 1817 | return ret; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1818 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1819 | mmc = dev_get_drvdata(dev); |
| 1820 | host = mmc_priv(mmc); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1821 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1822 | /* |
| 1823 | * Scan for hardware. |
| 1824 | */ |
| 1825 | ret = wbsd_scan(host); |
| 1826 | if (ret) |
| 1827 | { |
| 1828 | if (pnp && (ret == -ENODEV)) |
| 1829 | { |
| 1830 | printk(KERN_WARNING DRIVER_NAME |
| 1831 | ": Unable to confirm device presence. You may " |
| 1832 | "experience lock-ups.\n"); |
| 1833 | } |
| 1834 | else |
| 1835 | { |
| 1836 | wbsd_free_mmc(dev); |
| 1837 | return ret; |
| 1838 | } |
| 1839 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1840 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1841 | /* |
| 1842 | * Request resources. |
| 1843 | */ |
| 1844 | ret = wbsd_request_resources(host, io, irq, dma); |
| 1845 | if (ret) |
| 1846 | { |
| 1847 | wbsd_release_resources(host); |
| 1848 | wbsd_free_mmc(dev); |
| 1849 | return ret; |
| 1850 | } |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1851 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1852 | /* |
| 1853 | * See if chip needs to be configured. |
| 1854 | */ |
Pierre Ossman | 25cc5e5 | 2005-11-05 10:16:50 +0000 | [diff] [blame^] | 1855 | if (pnp) |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1856 | { |
Pierre Ossman | 25cc5e5 | 2005-11-05 10:16:50 +0000 | [diff] [blame^] | 1857 | if ((host->config != 0) && !wbsd_chip_validate(host)) |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1858 | { |
| 1859 | printk(KERN_WARNING DRIVER_NAME |
| 1860 | ": PnP active but chip not configured! " |
| 1861 | "You probably have a buggy BIOS. " |
| 1862 | "Configuring chip manually.\n"); |
| 1863 | wbsd_chip_config(host); |
| 1864 | } |
| 1865 | } |
| 1866 | else |
| 1867 | wbsd_chip_config(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1868 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1869 | /* |
| 1870 | * Power Management stuff. No idea how this works. |
| 1871 | * Not tested. |
| 1872 | */ |
| 1873 | #ifdef CONFIG_PM |
| 1874 | if (host->config) |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1875 | { |
| 1876 | wbsd_unlock_config(host); |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1877 | wbsd_write_config(host, WBSD_CONF_PME, 0xA0); |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1878 | wbsd_lock_config(host); |
| 1879 | } |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1880 | #endif |
| 1881 | /* |
| 1882 | * Allow device to initialise itself properly. |
| 1883 | */ |
| 1884 | mdelay(5); |
| 1885 | |
| 1886 | /* |
| 1887 | * Reset the chip into a known state. |
| 1888 | */ |
| 1889 | wbsd_init_device(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1890 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1891 | mmc_add_host(mmc); |
| 1892 | |
Russell King | d366b64 | 2005-08-19 09:40:08 +0100 | [diff] [blame] | 1893 | printk(KERN_INFO "%s: W83L51xD", mmc_hostname(mmc)); |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1894 | if (host->chip_id != 0) |
| 1895 | printk(" id %x", (int)host->chip_id); |
| 1896 | printk(" at 0x%x irq %d", (int)host->base, (int)host->irq); |
| 1897 | if (host->dma >= 0) |
| 1898 | printk(" dma %d", (int)host->dma); |
| 1899 | else |
| 1900 | printk(" FIFO"); |
| 1901 | if (pnp) |
| 1902 | printk(" PnP"); |
| 1903 | printk("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | |
| 1905 | return 0; |
| 1906 | } |
| 1907 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1908 | static void __devexit wbsd_shutdown(struct device* dev, int pnp) |
| 1909 | { |
| 1910 | struct mmc_host* mmc = dev_get_drvdata(dev); |
| 1911 | struct wbsd_host* host; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1912 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1913 | if (!mmc) |
| 1914 | return; |
| 1915 | |
| 1916 | host = mmc_priv(mmc); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1917 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1918 | mmc_remove_host(mmc); |
| 1919 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1920 | /* |
| 1921 | * Power down the SD/MMC function. |
| 1922 | */ |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1923 | if (!pnp) |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1924 | wbsd_chip_poweroff(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1925 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1926 | wbsd_release_resources(host); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1927 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1928 | wbsd_free_mmc(dev); |
| 1929 | } |
| 1930 | |
| 1931 | /* |
| 1932 | * Non-PnP |
| 1933 | */ |
| 1934 | |
| 1935 | static int __devinit wbsd_probe(struct device* dev) |
| 1936 | { |
| 1937 | return wbsd_init(dev, io, irq, dma, 0); |
| 1938 | } |
| 1939 | |
| 1940 | static int __devexit wbsd_remove(struct device* dev) |
| 1941 | { |
| 1942 | wbsd_shutdown(dev, 0); |
| 1943 | |
| 1944 | return 0; |
| 1945 | } |
| 1946 | |
| 1947 | /* |
| 1948 | * PnP |
| 1949 | */ |
| 1950 | |
| 1951 | #ifdef CONFIG_PNP |
| 1952 | |
| 1953 | static int __devinit |
| 1954 | wbsd_pnp_probe(struct pnp_dev * pnpdev, const struct pnp_device_id *dev_id) |
| 1955 | { |
| 1956 | int io, irq, dma; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1957 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1958 | /* |
| 1959 | * Get resources from PnP layer. |
| 1960 | */ |
| 1961 | io = pnp_port_start(pnpdev, 0); |
| 1962 | irq = pnp_irq(pnpdev, 0); |
| 1963 | if (pnp_dma_valid(pnpdev, 0)) |
| 1964 | dma = pnp_dma(pnpdev, 0); |
| 1965 | else |
| 1966 | dma = -1; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1967 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1968 | DBGF("PnP resources: port %3x irq %d dma %d\n", io, irq, dma); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 1969 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 1970 | return wbsd_init(&pnpdev->dev, io, irq, dma, 1); |
| 1971 | } |
| 1972 | |
| 1973 | static void __devexit wbsd_pnp_remove(struct pnp_dev * dev) |
| 1974 | { |
| 1975 | wbsd_shutdown(&dev->dev, 1); |
| 1976 | } |
| 1977 | |
| 1978 | #endif /* CONFIG_PNP */ |
| 1979 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | /* |
| 1981 | * Power management |
| 1982 | */ |
| 1983 | |
| 1984 | #ifdef CONFIG_PM |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1985 | |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 1986 | static int wbsd_suspend(struct device *dev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | { |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 1988 | struct mmc_host *mmc = dev_get_drvdata(dev); |
| 1989 | struct wbsd_host *host; |
| 1990 | int ret; |
| 1991 | |
| 1992 | if (!mmc) |
| 1993 | return 0; |
| 1994 | |
| 1995 | DBG("Suspending...\n"); |
| 1996 | |
| 1997 | ret = mmc_suspend_host(mmc, state); |
| 1998 | if (!ret) |
| 1999 | return ret; |
| 2000 | |
| 2001 | host = mmc_priv(mmc); |
| 2002 | |
| 2003 | wbsd_chip_poweroff(host); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | |
| 2005 | return 0; |
| 2006 | } |
| 2007 | |
Russell King | 9480e30 | 2005-10-28 09:52:56 -0700 | [diff] [blame] | 2008 | static int wbsd_resume(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | { |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 2010 | struct mmc_host *mmc = dev_get_drvdata(dev); |
| 2011 | struct wbsd_host *host; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2012 | |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 2013 | if (!mmc) |
| 2014 | return 0; |
| 2015 | |
| 2016 | DBG("Resuming...\n"); |
| 2017 | |
| 2018 | host = mmc_priv(mmc); |
| 2019 | |
| 2020 | wbsd_chip_config(host); |
| 2021 | |
| 2022 | /* |
| 2023 | * Allow device to initialise itself properly. |
| 2024 | */ |
| 2025 | mdelay(5); |
| 2026 | |
| 2027 | wbsd_init_device(host); |
| 2028 | |
| 2029 | return mmc_resume_host(mmc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2030 | } |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 2031 | |
| 2032 | #else /* CONFIG_PM */ |
| 2033 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2034 | #define wbsd_suspend NULL |
| 2035 | #define wbsd_resume NULL |
Pierre Ossman | 19c1f3c | 2005-10-28 21:37:29 +0100 | [diff] [blame] | 2036 | |
| 2037 | #endif /* CONFIG_PM */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 2039 | static struct platform_device *wbsd_device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2040 | |
| 2041 | static struct device_driver wbsd_driver = { |
| 2042 | .name = DRIVER_NAME, |
| 2043 | .bus = &platform_bus_type, |
| 2044 | .probe = wbsd_probe, |
| 2045 | .remove = wbsd_remove, |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 2046 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2047 | .suspend = wbsd_suspend, |
| 2048 | .resume = wbsd_resume, |
| 2049 | }; |
| 2050 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 2051 | #ifdef CONFIG_PNP |
| 2052 | |
| 2053 | static struct pnp_driver wbsd_pnp_driver = { |
| 2054 | .name = DRIVER_NAME, |
| 2055 | .id_table = pnp_dev_table, |
| 2056 | .probe = wbsd_pnp_probe, |
| 2057 | .remove = wbsd_pnp_remove, |
| 2058 | }; |
| 2059 | |
| 2060 | #endif /* CONFIG_PNP */ |
| 2061 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2062 | /* |
| 2063 | * Module loading/unloading |
| 2064 | */ |
| 2065 | |
| 2066 | static int __init wbsd_drv_init(void) |
| 2067 | { |
| 2068 | int result; |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 2069 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2070 | printk(KERN_INFO DRIVER_NAME |
| 2071 | ": Winbond W83L51xD SD/MMC card interface driver, " |
| 2072 | DRIVER_VERSION "\n"); |
| 2073 | printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 2075 | #ifdef CONFIG_PNP |
| 2076 | |
| 2077 | if (!nopnp) |
| 2078 | { |
| 2079 | result = pnp_register_driver(&wbsd_pnp_driver); |
| 2080 | if (result < 0) |
| 2081 | return result; |
| 2082 | } |
| 2083 | |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 2084 | #endif /* CONFIG_PNP */ |
| 2085 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 2086 | if (nopnp) |
| 2087 | { |
| 2088 | result = driver_register(&wbsd_driver); |
| 2089 | if (result < 0) |
| 2090 | return result; |
| 2091 | |
| 2092 | wbsd_device = platform_device_register_simple(DRIVER_NAME, -1, |
| 2093 | NULL, 0); |
| 2094 | if (IS_ERR(wbsd_device)) |
| 2095 | return PTR_ERR(wbsd_device); |
| 2096 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | |
| 2098 | return 0; |
| 2099 | } |
| 2100 | |
| 2101 | static void __exit wbsd_drv_exit(void) |
| 2102 | { |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 2103 | #ifdef CONFIG_PNP |
| 2104 | |
| 2105 | if (!nopnp) |
| 2106 | pnp_unregister_driver(&wbsd_pnp_driver); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 2107 | |
| 2108 | #endif /* CONFIG_PNP */ |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 2109 | |
| 2110 | if (nopnp) |
| 2111 | { |
| 2112 | platform_device_unregister(wbsd_device); |
Pierre Ossman | fecf92b | 2005-09-12 12:09:25 +0100 | [diff] [blame] | 2113 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 2114 | driver_unregister(&wbsd_driver); |
| 2115 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | |
| 2117 | DBG("unloaded\n"); |
| 2118 | } |
| 2119 | |
| 2120 | module_init(wbsd_drv_init); |
| 2121 | module_exit(wbsd_drv_exit); |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 2122 | #ifdef CONFIG_PNP |
| 2123 | module_param(nopnp, uint, 0444); |
| 2124 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | module_param(io, uint, 0444); |
| 2126 | module_param(irq, uint, 0444); |
| 2127 | module_param(dma, int, 0444); |
| 2128 | |
| 2129 | MODULE_LICENSE("GPL"); |
| 2130 | MODULE_DESCRIPTION("Winbond W83L51xD SD/MMC card interface driver"); |
| 2131 | MODULE_VERSION(DRIVER_VERSION); |
| 2132 | |
Pierre Ossman | 85bcc13 | 2005-05-08 19:35:27 +0100 | [diff] [blame] | 2133 | #ifdef CONFIG_PNP |
| 2134 | MODULE_PARM_DESC(nopnp, "Scan for device instead of relying on PNP. (default 0)"); |
| 2135 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | MODULE_PARM_DESC(io, "I/O base to allocate. Must be 8 byte aligned. (default 0x248)"); |
| 2137 | MODULE_PARM_DESC(irq, "IRQ to allocate. (default 6)"); |
| 2138 | MODULE_PARM_DESC(dma, "DMA channel to allocate. -1 for no DMA. (default 2)"); |