Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2009 - Maxim Levitsky |
| 3 | * driver for Ricoh xD readers |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License version 2 as |
| 7 | * published by the Free Software Foundation. |
| 8 | */ |
| 9 | |
| 10 | #include <linux/kernel.h> |
| 11 | #include <linux/module.h> |
| 12 | #include <linux/jiffies.h> |
| 13 | #include <linux/workqueue.h> |
| 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/pci_ids.h> |
| 16 | #include <asm/byteorder.h> |
| 17 | #include <linux/sched.h> |
| 18 | #include "sm_common.h" |
| 19 | #include "r852.h" |
| 20 | |
| 21 | |
| 22 | static int enable_dma = 1; |
| 23 | module_param(enable_dma, bool, S_IRUGO); |
| 24 | MODULE_PARM_DESC(enable_dma, "Enable usage of the DMA (default)"); |
| 25 | |
| 26 | static int debug; |
| 27 | module_param(debug, int, S_IRUGO | S_IWUSR); |
| 28 | MODULE_PARM_DESC(debug, "Debug level (0-2)"); |
| 29 | |
| 30 | /* read register */ |
| 31 | static inline uint8_t r852_read_reg(struct r852_device *dev, int address) |
| 32 | { |
| 33 | uint8_t reg = readb(dev->mmio + address); |
| 34 | return reg; |
| 35 | } |
| 36 | |
| 37 | /* write register */ |
| 38 | static inline void r852_write_reg(struct r852_device *dev, |
| 39 | int address, uint8_t value) |
| 40 | { |
| 41 | writeb(value, dev->mmio + address); |
| 42 | mmiowb(); |
| 43 | } |
| 44 | |
| 45 | |
| 46 | /* read dword sized register */ |
| 47 | static inline uint32_t r852_read_reg_dword(struct r852_device *dev, int address) |
| 48 | { |
| 49 | uint32_t reg = le32_to_cpu(readl(dev->mmio + address)); |
| 50 | return reg; |
| 51 | } |
| 52 | |
| 53 | /* write dword sized register */ |
| 54 | static inline void r852_write_reg_dword(struct r852_device *dev, |
| 55 | int address, uint32_t value) |
| 56 | { |
| 57 | writel(cpu_to_le32(value), dev->mmio + address); |
| 58 | mmiowb(); |
| 59 | } |
| 60 | |
| 61 | /* returns pointer to our private structure */ |
| 62 | static inline struct r852_device *r852_get_dev(struct mtd_info *mtd) |
| 63 | { |
| 64 | struct nand_chip *chip = (struct nand_chip *)mtd->priv; |
| 65 | return (struct r852_device *)chip->priv; |
| 66 | } |
| 67 | |
| 68 | |
| 69 | /* check if controller supports dma */ |
| 70 | static void r852_dma_test(struct r852_device *dev) |
| 71 | { |
| 72 | dev->dma_usable = (r852_read_reg(dev, R852_DMA_CAP) & |
| 73 | (R852_DMA1 | R852_DMA2)) == (R852_DMA1 | R852_DMA2); |
| 74 | |
| 75 | if (!dev->dma_usable) |
| 76 | message("Non dma capable device detected, dma disabled"); |
| 77 | |
| 78 | if (!enable_dma) { |
| 79 | message("disabling dma on user request"); |
| 80 | dev->dma_usable = 0; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * Enable dma. Enables ether first or second stage of the DMA, |
| 86 | * Expects dev->dma_dir and dev->dma_state be set |
| 87 | */ |
| 88 | static void r852_dma_enable(struct r852_device *dev) |
| 89 | { |
| 90 | uint8_t dma_reg, dma_irq_reg; |
| 91 | |
| 92 | /* Set up dma settings */ |
| 93 | dma_reg = r852_read_reg_dword(dev, R852_DMA_SETTINGS); |
| 94 | dma_reg &= ~(R852_DMA_READ | R852_DMA_INTERNAL | R852_DMA_MEMORY); |
| 95 | |
| 96 | if (dev->dma_dir) |
| 97 | dma_reg |= R852_DMA_READ; |
| 98 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 99 | if (dev->dma_state == DMA_INTERNAL) { |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 100 | dma_reg |= R852_DMA_INTERNAL; |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 101 | /* Precaution to make sure HW doesn't write */ |
| 102 | /* to random kernel memory */ |
| 103 | r852_write_reg_dword(dev, R852_DMA_ADDR, |
| 104 | cpu_to_le32(dev->phys_bounce_buffer)); |
| 105 | } else { |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 106 | dma_reg |= R852_DMA_MEMORY; |
| 107 | r852_write_reg_dword(dev, R852_DMA_ADDR, |
| 108 | cpu_to_le32(dev->phys_dma_addr)); |
| 109 | } |
| 110 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 111 | /* Precaution: make sure write reached the device */ |
| 112 | r852_read_reg_dword(dev, R852_DMA_ADDR); |
| 113 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 114 | r852_write_reg_dword(dev, R852_DMA_SETTINGS, dma_reg); |
| 115 | |
| 116 | /* Set dma irq */ |
| 117 | dma_irq_reg = r852_read_reg_dword(dev, R852_DMA_IRQ_ENABLE); |
| 118 | r852_write_reg_dword(dev, R852_DMA_IRQ_ENABLE, |
| 119 | dma_irq_reg | |
| 120 | R852_DMA_IRQ_INTERNAL | |
| 121 | R852_DMA_IRQ_ERROR | |
| 122 | R852_DMA_IRQ_MEMORY); |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * Disable dma, called from the interrupt handler, which specifies |
| 127 | * success of the operation via 'error' argument |
| 128 | */ |
| 129 | static void r852_dma_done(struct r852_device *dev, int error) |
| 130 | { |
| 131 | WARN_ON(dev->dma_stage == 0); |
| 132 | |
| 133 | r852_write_reg_dword(dev, R852_DMA_IRQ_STA, |
| 134 | r852_read_reg_dword(dev, R852_DMA_IRQ_STA)); |
| 135 | |
| 136 | r852_write_reg_dword(dev, R852_DMA_SETTINGS, 0); |
| 137 | r852_write_reg_dword(dev, R852_DMA_IRQ_ENABLE, 0); |
| 138 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 139 | /* Precaution to make sure HW doesn't write to random kernel memory */ |
| 140 | r852_write_reg_dword(dev, R852_DMA_ADDR, |
| 141 | cpu_to_le32(dev->phys_bounce_buffer)); |
| 142 | r852_read_reg_dword(dev, R852_DMA_ADDR); |
| 143 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 144 | dev->dma_error = error; |
| 145 | dev->dma_stage = 0; |
| 146 | |
| 147 | if (dev->phys_dma_addr && dev->phys_dma_addr != dev->phys_bounce_buffer) |
| 148 | pci_unmap_single(dev->pci_dev, dev->phys_dma_addr, R852_DMA_LEN, |
| 149 | dev->dma_dir ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE); |
| 150 | complete(&dev->dma_done); |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * Wait, till dma is done, which includes both phases of it |
| 155 | */ |
| 156 | static int r852_dma_wait(struct r852_device *dev) |
| 157 | { |
| 158 | long timeout = wait_for_completion_timeout(&dev->dma_done, |
| 159 | msecs_to_jiffies(1000)); |
| 160 | if (!timeout) { |
| 161 | dbg("timeout waiting for DMA interrupt"); |
| 162 | return -ETIMEDOUT; |
| 163 | } |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * Read/Write one page using dma. Only pages can be read (512 bytes) |
| 170 | */ |
| 171 | static void r852_do_dma(struct r852_device *dev, uint8_t *buf, int do_read) |
| 172 | { |
| 173 | int bounce = 0; |
| 174 | unsigned long flags; |
| 175 | int error; |
| 176 | |
| 177 | dev->dma_error = 0; |
| 178 | |
| 179 | /* Set dma direction */ |
| 180 | dev->dma_dir = do_read; |
| 181 | dev->dma_stage = 1; |
| 182 | |
| 183 | dbg_verbose("doing dma %s ", do_read ? "read" : "write"); |
| 184 | |
| 185 | /* Set intial dma state: for reading first fill on board buffer, |
| 186 | from device, for writes first fill the buffer from memory*/ |
| 187 | dev->dma_state = do_read ? DMA_INTERNAL : DMA_MEMORY; |
| 188 | |
| 189 | /* if incoming buffer is not page aligned, we should do bounce */ |
| 190 | if ((unsigned long)buf & (R852_DMA_LEN-1)) |
| 191 | bounce = 1; |
| 192 | |
| 193 | if (!bounce) { |
| 194 | dev->phys_dma_addr = pci_map_single(dev->pci_dev, (void *)buf, |
| 195 | R852_DMA_LEN, |
| 196 | (do_read ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE)); |
| 197 | |
| 198 | if (dev->phys_dma_addr == DMA_ERROR_CODE) |
| 199 | bounce = 1; |
| 200 | } |
| 201 | |
| 202 | if (bounce) { |
| 203 | dbg_verbose("dma: using bounce buffer"); |
| 204 | dev->phys_dma_addr = dev->phys_bounce_buffer; |
| 205 | if (!do_read) |
| 206 | memcpy(dev->bounce_buffer, buf, R852_DMA_LEN); |
| 207 | } |
| 208 | |
| 209 | /* Enable DMA */ |
| 210 | spin_lock_irqsave(&dev->irqlock, flags); |
| 211 | r852_dma_enable(dev); |
| 212 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 213 | |
| 214 | /* Wait till complete */ |
| 215 | error = r852_dma_wait(dev); |
| 216 | |
| 217 | if (error) { |
| 218 | r852_dma_done(dev, error); |
| 219 | return; |
| 220 | } |
| 221 | |
| 222 | if (do_read && bounce) |
| 223 | memcpy((void *)buf, dev->bounce_buffer, R852_DMA_LEN); |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * Program data lines of the nand chip to send data to it |
| 228 | */ |
| 229 | void r852_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
| 230 | { |
| 231 | struct r852_device *dev = r852_get_dev(mtd); |
| 232 | uint32_t reg; |
| 233 | |
| 234 | /* Don't allow any access to hardware if we suspect card removal */ |
| 235 | if (dev->card_unstable) |
| 236 | return; |
| 237 | |
| 238 | /* Special case for whole sector read */ |
| 239 | if (len == R852_DMA_LEN && dev->dma_usable) { |
| 240 | r852_do_dma(dev, (uint8_t *)buf, 0); |
| 241 | return; |
| 242 | } |
| 243 | |
| 244 | /* write DWORD chinks - faster */ |
| 245 | while (len) { |
| 246 | reg = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; |
| 247 | r852_write_reg_dword(dev, R852_DATALINE, reg); |
| 248 | buf += 4; |
| 249 | len -= 4; |
| 250 | |
| 251 | } |
| 252 | |
| 253 | /* write rest */ |
| 254 | while (len) |
| 255 | r852_write_reg(dev, R852_DATALINE, *buf++); |
| 256 | } |
| 257 | |
| 258 | /* |
| 259 | * Read data lines of the nand chip to retrieve data |
| 260 | */ |
| 261 | void r852_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) |
| 262 | { |
| 263 | struct r852_device *dev = r852_get_dev(mtd); |
| 264 | uint32_t reg; |
| 265 | |
| 266 | if (dev->card_unstable) { |
| 267 | /* since we can't signal error here, at least, return |
| 268 | predictable buffer */ |
| 269 | memset(buf, 0, len); |
| 270 | return; |
| 271 | } |
| 272 | |
| 273 | /* special case for whole sector read */ |
| 274 | if (len == R852_DMA_LEN && dev->dma_usable) { |
| 275 | r852_do_dma(dev, buf, 1); |
| 276 | return; |
| 277 | } |
| 278 | |
| 279 | /* read in dword sized chunks */ |
| 280 | while (len >= 4) { |
| 281 | |
| 282 | reg = r852_read_reg_dword(dev, R852_DATALINE); |
| 283 | *buf++ = reg & 0xFF; |
| 284 | *buf++ = (reg >> 8) & 0xFF; |
| 285 | *buf++ = (reg >> 16) & 0xFF; |
| 286 | *buf++ = (reg >> 24) & 0xFF; |
| 287 | len -= 4; |
| 288 | } |
| 289 | |
| 290 | /* read the reset by bytes */ |
| 291 | while (len--) |
| 292 | *buf++ = r852_read_reg(dev, R852_DATALINE); |
| 293 | } |
| 294 | |
| 295 | /* |
| 296 | * Read one byte from nand chip |
| 297 | */ |
| 298 | static uint8_t r852_read_byte(struct mtd_info *mtd) |
| 299 | { |
| 300 | struct r852_device *dev = r852_get_dev(mtd); |
| 301 | |
| 302 | /* Same problem as in r852_read_buf.... */ |
| 303 | if (dev->card_unstable) |
| 304 | return 0; |
| 305 | |
| 306 | return r852_read_reg(dev, R852_DATALINE); |
| 307 | } |
| 308 | |
| 309 | |
| 310 | /* |
| 311 | * Readback the buffer to verify it |
| 312 | */ |
| 313 | int r852_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
| 314 | { |
| 315 | struct r852_device *dev = r852_get_dev(mtd); |
| 316 | |
| 317 | /* We can't be sure about anything here... */ |
| 318 | if (dev->card_unstable) |
| 319 | return -1; |
| 320 | |
| 321 | /* This will never happen, unless you wired up a nand chip |
| 322 | with > 512 bytes page size to the reader */ |
| 323 | if (len > SM_SECTOR_SIZE) |
| 324 | return 0; |
| 325 | |
| 326 | r852_read_buf(mtd, dev->tmp_buffer, len); |
| 327 | return memcmp(buf, dev->tmp_buffer, len); |
| 328 | } |
| 329 | |
| 330 | /* |
| 331 | * Control several chip lines & send commands |
| 332 | */ |
| 333 | void r852_cmdctl(struct mtd_info *mtd, int dat, unsigned int ctrl) |
| 334 | { |
| 335 | struct r852_device *dev = r852_get_dev(mtd); |
| 336 | |
| 337 | if (dev->card_unstable) |
| 338 | return; |
| 339 | |
| 340 | if (ctrl & NAND_CTRL_CHANGE) { |
| 341 | |
| 342 | dev->ctlreg &= ~(R852_CTL_DATA | R852_CTL_COMMAND | |
| 343 | R852_CTL_ON | R852_CTL_CARDENABLE); |
| 344 | |
| 345 | if (ctrl & NAND_ALE) |
| 346 | dev->ctlreg |= R852_CTL_DATA; |
| 347 | |
| 348 | if (ctrl & NAND_CLE) |
| 349 | dev->ctlreg |= R852_CTL_COMMAND; |
| 350 | |
| 351 | if (ctrl & NAND_NCE) |
| 352 | dev->ctlreg |= (R852_CTL_CARDENABLE | R852_CTL_ON); |
| 353 | else |
| 354 | dev->ctlreg &= ~R852_CTL_WRITE; |
| 355 | |
| 356 | /* when write is stareted, enable write access */ |
| 357 | if (dat == NAND_CMD_ERASE1) |
| 358 | dev->ctlreg |= R852_CTL_WRITE; |
| 359 | |
| 360 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 361 | } |
| 362 | |
| 363 | /* HACK: NAND_CMD_SEQIN is called without NAND_CTRL_CHANGE, but we need |
| 364 | to set write mode */ |
| 365 | if (dat == NAND_CMD_SEQIN && (dev->ctlreg & R852_CTL_COMMAND)) { |
| 366 | dev->ctlreg |= R852_CTL_WRITE; |
| 367 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 368 | } |
| 369 | |
| 370 | if (dat != NAND_CMD_NONE) |
| 371 | r852_write_reg(dev, R852_DATALINE, dat); |
| 372 | } |
| 373 | |
| 374 | /* |
| 375 | * Wait till card is ready. |
| 376 | * based on nand_wait, but returns errors on DMA error |
| 377 | */ |
| 378 | int r852_wait(struct mtd_info *mtd, struct nand_chip *chip) |
| 379 | { |
| 380 | struct r852_device *dev = (struct r852_device *)chip->priv; |
| 381 | |
| 382 | unsigned long timeout; |
| 383 | int status; |
| 384 | |
| 385 | timeout = jiffies + (chip->state == FL_ERASING ? |
| 386 | msecs_to_jiffies(400) : msecs_to_jiffies(20)); |
| 387 | |
| 388 | while (time_before(jiffies, timeout)) |
| 389 | if (chip->dev_ready(mtd)) |
| 390 | break; |
| 391 | |
| 392 | chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
| 393 | status = (int)chip->read_byte(mtd); |
| 394 | |
| 395 | /* Unfortunelly, no way to send detailed error status... */ |
| 396 | if (dev->dma_error) { |
| 397 | status |= NAND_STATUS_FAIL; |
| 398 | dev->dma_error = 0; |
| 399 | } |
| 400 | return status; |
| 401 | } |
| 402 | |
| 403 | /* |
| 404 | * Check if card is ready |
| 405 | */ |
| 406 | |
| 407 | int r852_ready(struct mtd_info *mtd) |
| 408 | { |
| 409 | struct r852_device *dev = r852_get_dev(mtd); |
| 410 | return !(r852_read_reg(dev, R852_CARD_STA) & R852_CARD_STA_BUSY); |
| 411 | } |
| 412 | |
| 413 | |
| 414 | /* |
| 415 | * Set ECC engine mode |
| 416 | */ |
| 417 | |
| 418 | void r852_ecc_hwctl(struct mtd_info *mtd, int mode) |
| 419 | { |
| 420 | struct r852_device *dev = r852_get_dev(mtd); |
| 421 | |
| 422 | if (dev->card_unstable) |
| 423 | return; |
| 424 | |
| 425 | switch (mode) { |
| 426 | case NAND_ECC_READ: |
| 427 | case NAND_ECC_WRITE: |
| 428 | /* enable ecc generation/check*/ |
| 429 | dev->ctlreg |= R852_CTL_ECC_ENABLE; |
| 430 | |
| 431 | /* flush ecc buffer */ |
| 432 | r852_write_reg(dev, R852_CTL, |
| 433 | dev->ctlreg | R852_CTL_ECC_ACCESS); |
| 434 | |
| 435 | r852_read_reg_dword(dev, R852_DATALINE); |
| 436 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 437 | return; |
| 438 | |
| 439 | case NAND_ECC_READSYN: |
| 440 | /* disable ecc generation */ |
| 441 | dev->ctlreg &= ~R852_CTL_ECC_ENABLE; |
| 442 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /* |
| 447 | * Calculate ECC, only used for writes |
| 448 | */ |
| 449 | |
| 450 | int r852_ecc_calculate(struct mtd_info *mtd, const uint8_t *dat, |
| 451 | uint8_t *ecc_code) |
| 452 | { |
| 453 | struct r852_device *dev = r852_get_dev(mtd); |
| 454 | struct sm_oob *oob = (struct sm_oob *)ecc_code; |
| 455 | uint32_t ecc1, ecc2; |
| 456 | |
| 457 | if (dev->card_unstable) |
| 458 | return 0; |
| 459 | |
| 460 | dev->ctlreg &= ~R852_CTL_ECC_ENABLE; |
| 461 | r852_write_reg(dev, R852_CTL, dev->ctlreg | R852_CTL_ECC_ACCESS); |
| 462 | |
| 463 | ecc1 = r852_read_reg_dword(dev, R852_DATALINE); |
| 464 | ecc2 = r852_read_reg_dword(dev, R852_DATALINE); |
| 465 | |
| 466 | oob->ecc1[0] = (ecc1) & 0xFF; |
| 467 | oob->ecc1[1] = (ecc1 >> 8) & 0xFF; |
| 468 | oob->ecc1[2] = (ecc1 >> 16) & 0xFF; |
| 469 | |
| 470 | oob->ecc2[0] = (ecc2) & 0xFF; |
| 471 | oob->ecc2[1] = (ecc2 >> 8) & 0xFF; |
| 472 | oob->ecc2[2] = (ecc2 >> 16) & 0xFF; |
| 473 | |
| 474 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 475 | return 0; |
| 476 | } |
| 477 | |
| 478 | /* |
| 479 | * Correct the data using ECC, hw did almost everything for us |
| 480 | */ |
| 481 | |
| 482 | int r852_ecc_correct(struct mtd_info *mtd, uint8_t *dat, |
| 483 | uint8_t *read_ecc, uint8_t *calc_ecc) |
| 484 | { |
| 485 | uint16_t ecc_reg; |
| 486 | uint8_t ecc_status, err_byte; |
| 487 | int i, error = 0; |
| 488 | |
| 489 | struct r852_device *dev = r852_get_dev(mtd); |
| 490 | |
| 491 | if (dev->card_unstable) |
| 492 | return 0; |
| 493 | |
| 494 | r852_write_reg(dev, R852_CTL, dev->ctlreg | R852_CTL_ECC_ACCESS); |
| 495 | ecc_reg = r852_read_reg_dword(dev, R852_DATALINE); |
| 496 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 497 | |
| 498 | for (i = 0 ; i <= 1 ; i++) { |
| 499 | |
| 500 | ecc_status = (ecc_reg >> 8) & 0xFF; |
| 501 | |
| 502 | /* ecc uncorrectable error */ |
| 503 | if (ecc_status & R852_ECC_FAIL) { |
| 504 | dbg("ecc: unrecoverable error, in half %d", i); |
| 505 | error = -1; |
| 506 | goto exit; |
| 507 | } |
| 508 | |
| 509 | /* correctable error */ |
| 510 | if (ecc_status & R852_ECC_CORRECTABLE) { |
| 511 | |
| 512 | err_byte = ecc_reg & 0xFF; |
| 513 | dbg("ecc: recoverable error, " |
| 514 | "in half %d, byte %d, bit %d", i, |
| 515 | err_byte, ecc_status & R852_ECC_ERR_BIT_MSK); |
| 516 | |
| 517 | dat[err_byte] ^= |
| 518 | 1 << (ecc_status & R852_ECC_ERR_BIT_MSK); |
| 519 | error++; |
| 520 | } |
| 521 | |
| 522 | dat += 256; |
| 523 | ecc_reg >>= 16; |
| 524 | } |
| 525 | exit: |
| 526 | return error; |
| 527 | } |
| 528 | |
| 529 | /* |
| 530 | * This is copy of nand_read_oob_std |
| 531 | * nand_read_oob_syndrome assumes we can send column address - we can't |
| 532 | */ |
| 533 | static int r852_read_oob(struct mtd_info *mtd, struct nand_chip *chip, |
| 534 | int page, int sndcmd) |
| 535 | { |
| 536 | if (sndcmd) { |
| 537 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); |
| 538 | sndcmd = 0; |
| 539 | } |
| 540 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
| 541 | return sndcmd; |
| 542 | } |
| 543 | |
| 544 | /* |
| 545 | * Start the nand engine |
| 546 | */ |
| 547 | |
| 548 | void r852_engine_enable(struct r852_device *dev) |
| 549 | { |
| 550 | if (r852_read_reg_dword(dev, R852_HW) & R852_HW_UNKNOWN) { |
| 551 | r852_write_reg(dev, R852_CTL, R852_CTL_RESET | R852_CTL_ON); |
| 552 | r852_write_reg_dword(dev, R852_HW, R852_HW_ENABLED); |
| 553 | } else { |
| 554 | r852_write_reg_dword(dev, R852_HW, R852_HW_ENABLED); |
| 555 | r852_write_reg(dev, R852_CTL, R852_CTL_RESET | R852_CTL_ON); |
| 556 | } |
| 557 | msleep(300); |
| 558 | r852_write_reg(dev, R852_CTL, 0); |
| 559 | } |
| 560 | |
| 561 | |
| 562 | /* |
| 563 | * Stop the nand engine |
| 564 | */ |
| 565 | |
| 566 | void r852_engine_disable(struct r852_device *dev) |
| 567 | { |
| 568 | r852_write_reg_dword(dev, R852_HW, 0); |
| 569 | r852_write_reg(dev, R852_CTL, R852_CTL_RESET); |
| 570 | } |
| 571 | |
| 572 | /* |
| 573 | * Test if card is present |
| 574 | */ |
| 575 | |
| 576 | void r852_card_update_present(struct r852_device *dev) |
| 577 | { |
| 578 | unsigned long flags; |
| 579 | uint8_t reg; |
| 580 | |
| 581 | spin_lock_irqsave(&dev->irqlock, flags); |
| 582 | reg = r852_read_reg(dev, R852_CARD_STA); |
| 583 | dev->card_detected = !!(reg & R852_CARD_STA_PRESENT); |
| 584 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 585 | } |
| 586 | |
| 587 | /* |
| 588 | * Update card detection IRQ state according to current card state |
| 589 | * which is read in r852_card_update_present |
| 590 | */ |
| 591 | void r852_update_card_detect(struct r852_device *dev) |
| 592 | { |
| 593 | int card_detect_reg = r852_read_reg(dev, R852_CARD_IRQ_ENABLE); |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 594 | dev->card_unstable = 0; |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 595 | |
| 596 | card_detect_reg &= ~(R852_CARD_IRQ_REMOVE | R852_CARD_IRQ_INSERT); |
| 597 | card_detect_reg |= R852_CARD_IRQ_GENABLE; |
| 598 | |
| 599 | card_detect_reg |= dev->card_detected ? |
| 600 | R852_CARD_IRQ_REMOVE : R852_CARD_IRQ_INSERT; |
| 601 | |
| 602 | r852_write_reg(dev, R852_CARD_IRQ_ENABLE, card_detect_reg); |
| 603 | } |
| 604 | |
| 605 | ssize_t r852_media_type_show(struct device *sys_dev, |
| 606 | struct device_attribute *attr, char *buf) |
| 607 | { |
| 608 | struct mtd_info *mtd = container_of(sys_dev, struct mtd_info, dev); |
| 609 | struct r852_device *dev = r852_get_dev(mtd); |
| 610 | char *data = dev->sm ? "smartmedia" : "xd"; |
| 611 | |
| 612 | strcpy(buf, data); |
| 613 | return strlen(data); |
| 614 | } |
| 615 | |
| 616 | DEVICE_ATTR(media_type, S_IRUGO, r852_media_type_show, NULL); |
| 617 | |
| 618 | |
| 619 | /* Detect properties of card in slot */ |
| 620 | void r852_update_media_status(struct r852_device *dev) |
| 621 | { |
| 622 | uint8_t reg; |
| 623 | unsigned long flags; |
| 624 | int readonly; |
| 625 | |
| 626 | spin_lock_irqsave(&dev->irqlock, flags); |
| 627 | if (!dev->card_detected) { |
| 628 | message("card removed"); |
| 629 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 630 | return ; |
| 631 | } |
| 632 | |
| 633 | readonly = r852_read_reg(dev, R852_CARD_STA) & R852_CARD_STA_RO; |
| 634 | reg = r852_read_reg(dev, R852_DMA_CAP); |
| 635 | dev->sm = (reg & (R852_DMA1 | R852_DMA2)) && (reg & R852_SMBIT); |
| 636 | |
| 637 | message("detected %s %s card in slot", |
| 638 | dev->sm ? "SmartMedia" : "xD", |
| 639 | readonly ? "readonly" : "writeable"); |
| 640 | |
| 641 | dev->readonly = readonly; |
| 642 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 643 | } |
| 644 | |
| 645 | /* |
| 646 | * Register the nand device |
| 647 | * Called when the card is detected |
| 648 | */ |
| 649 | int r852_register_nand_device(struct r852_device *dev) |
| 650 | { |
| 651 | dev->mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL); |
| 652 | |
| 653 | if (!dev->mtd) |
| 654 | goto error1; |
| 655 | |
| 656 | WARN_ON(dev->card_registred); |
| 657 | |
| 658 | dev->mtd->owner = THIS_MODULE; |
| 659 | dev->mtd->priv = dev->chip; |
| 660 | dev->mtd->dev.parent = &dev->pci_dev->dev; |
| 661 | |
| 662 | if (dev->readonly) |
| 663 | dev->chip->options |= NAND_ROM; |
| 664 | |
| 665 | r852_engine_enable(dev); |
| 666 | |
| 667 | if (sm_register_device(dev->mtd)) |
| 668 | goto error2; |
| 669 | |
Maxim Levitsky | 133fa8c | 2010-02-26 22:08:40 +0200 | [diff] [blame] | 670 | if (device_create_file(&dev->mtd->dev, &dev_attr_media_type)) |
| 671 | message("can't create media type sysfs attribute"); |
| 672 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 673 | dev->card_registred = 1; |
| 674 | return 0; |
| 675 | error2: |
| 676 | kfree(dev->mtd); |
| 677 | error1: |
| 678 | /* Force card redetect */ |
| 679 | dev->card_detected = 0; |
| 680 | return -1; |
| 681 | } |
| 682 | |
| 683 | /* |
| 684 | * Unregister the card |
| 685 | */ |
| 686 | |
| 687 | void r852_unregister_nand_device(struct r852_device *dev) |
| 688 | { |
| 689 | if (!dev->card_registred) |
| 690 | return; |
| 691 | |
| 692 | device_remove_file(&dev->mtd->dev, &dev_attr_media_type); |
| 693 | nand_release(dev->mtd); |
| 694 | r852_engine_disable(dev); |
| 695 | dev->card_registred = 0; |
| 696 | kfree(dev->mtd); |
| 697 | dev->mtd = NULL; |
| 698 | } |
| 699 | |
| 700 | /* Card state updater */ |
| 701 | void r852_card_detect_work(struct work_struct *work) |
| 702 | { |
| 703 | struct r852_device *dev = |
| 704 | container_of(work, struct r852_device, card_detect_work.work); |
| 705 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 706 | r852_card_update_present(dev); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 707 | dev->card_unstable = 0; |
| 708 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 709 | /* False alarm */ |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 710 | if (dev->card_detected == dev->card_registred) |
| 711 | goto exit; |
| 712 | |
| 713 | /* Read media properties */ |
| 714 | r852_update_media_status(dev); |
| 715 | |
| 716 | /* Register the card */ |
| 717 | if (dev->card_detected) |
| 718 | r852_register_nand_device(dev); |
| 719 | else |
| 720 | r852_unregister_nand_device(dev); |
| 721 | exit: |
| 722 | /* Update detection logic */ |
| 723 | r852_update_card_detect(dev); |
| 724 | } |
| 725 | |
| 726 | /* Ack + disable IRQ generation */ |
| 727 | static void r852_disable_irqs(struct r852_device *dev) |
| 728 | { |
| 729 | uint8_t reg; |
| 730 | reg = r852_read_reg(dev, R852_CARD_IRQ_ENABLE); |
| 731 | r852_write_reg(dev, R852_CARD_IRQ_ENABLE, reg & ~R852_CARD_IRQ_MASK); |
| 732 | |
| 733 | reg = r852_read_reg_dword(dev, R852_DMA_IRQ_ENABLE); |
| 734 | r852_write_reg_dword(dev, R852_DMA_IRQ_ENABLE, |
| 735 | reg & ~R852_DMA_IRQ_MASK); |
| 736 | |
| 737 | r852_write_reg(dev, R852_CARD_IRQ_STA, R852_CARD_IRQ_MASK); |
| 738 | r852_write_reg_dword(dev, R852_DMA_IRQ_STA, R852_DMA_IRQ_MASK); |
| 739 | } |
| 740 | |
| 741 | /* Interrupt handler */ |
| 742 | static irqreturn_t r852_irq(int irq, void *data) |
| 743 | { |
| 744 | struct r852_device *dev = (struct r852_device *)data; |
| 745 | |
| 746 | uint8_t card_status, dma_status; |
| 747 | unsigned long flags; |
| 748 | irqreturn_t ret = IRQ_NONE; |
| 749 | |
| 750 | spin_lock_irqsave(&dev->irqlock, flags); |
| 751 | |
| 752 | /* We can recieve shared interrupt while pci is suspended |
| 753 | in that case reads will return 0xFFFFFFFF.... */ |
| 754 | if (dev->insuspend) |
| 755 | goto out; |
| 756 | |
| 757 | /* handle card detection interrupts first */ |
| 758 | card_status = r852_read_reg(dev, R852_CARD_IRQ_STA); |
| 759 | r852_write_reg(dev, R852_CARD_IRQ_STA, card_status); |
| 760 | |
| 761 | if (card_status & (R852_CARD_IRQ_INSERT|R852_CARD_IRQ_REMOVE)) { |
| 762 | |
| 763 | ret = IRQ_HANDLED; |
| 764 | dev->card_detected = !!(card_status & R852_CARD_IRQ_INSERT); |
| 765 | |
| 766 | /* we shouldn't recieve any interrupts if we wait for card |
| 767 | to settle */ |
| 768 | WARN_ON(dev->card_unstable); |
| 769 | |
| 770 | /* disable irqs while card is unstable */ |
| 771 | /* this will timeout DMA if active, but better that garbage */ |
| 772 | r852_disable_irqs(dev); |
| 773 | |
| 774 | if (dev->card_unstable) |
| 775 | goto out; |
| 776 | |
| 777 | /* let, card state to settle a bit, and then do the work */ |
| 778 | dev->card_unstable = 1; |
| 779 | queue_delayed_work(dev->card_workqueue, |
| 780 | &dev->card_detect_work, msecs_to_jiffies(100)); |
| 781 | goto out; |
| 782 | } |
| 783 | |
| 784 | |
| 785 | /* Handle dma interrupts */ |
| 786 | dma_status = r852_read_reg_dword(dev, R852_DMA_IRQ_STA); |
| 787 | r852_write_reg_dword(dev, R852_DMA_IRQ_STA, dma_status); |
| 788 | |
| 789 | if (dma_status & R852_DMA_IRQ_MASK) { |
| 790 | |
| 791 | ret = IRQ_HANDLED; |
| 792 | |
| 793 | if (dma_status & R852_DMA_IRQ_ERROR) { |
| 794 | dbg("recieved dma error IRQ"); |
| 795 | r852_dma_done(dev, -EIO); |
| 796 | goto out; |
| 797 | } |
| 798 | |
| 799 | /* recieved DMA interrupt out of nowhere? */ |
| 800 | WARN_ON_ONCE(dev->dma_stage == 0); |
| 801 | |
| 802 | if (dev->dma_stage == 0) |
| 803 | goto out; |
| 804 | |
| 805 | /* done device access */ |
| 806 | if (dev->dma_state == DMA_INTERNAL && |
| 807 | (dma_status & R852_DMA_IRQ_INTERNAL)) { |
| 808 | |
| 809 | dev->dma_state = DMA_MEMORY; |
| 810 | dev->dma_stage++; |
| 811 | } |
| 812 | |
| 813 | /* done memory DMA */ |
| 814 | if (dev->dma_state == DMA_MEMORY && |
| 815 | (dma_status & R852_DMA_IRQ_MEMORY)) { |
| 816 | dev->dma_state = DMA_INTERNAL; |
| 817 | dev->dma_stage++; |
| 818 | } |
| 819 | |
| 820 | /* Enable 2nd half of dma dance */ |
| 821 | if (dev->dma_stage == 2) |
| 822 | r852_dma_enable(dev); |
| 823 | |
| 824 | /* Operation done */ |
| 825 | if (dev->dma_stage == 3) |
| 826 | r852_dma_done(dev, 0); |
| 827 | goto out; |
| 828 | } |
| 829 | |
| 830 | /* Handle unknown interrupts */ |
| 831 | if (dma_status) |
| 832 | dbg("bad dma IRQ status = %x", dma_status); |
| 833 | |
| 834 | if (card_status & ~R852_CARD_STA_CD) |
| 835 | dbg("strange card status = %x", card_status); |
| 836 | |
| 837 | out: |
| 838 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 839 | return ret; |
| 840 | } |
| 841 | |
| 842 | int r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) |
| 843 | { |
| 844 | int error; |
| 845 | struct nand_chip *chip; |
| 846 | struct r852_device *dev; |
| 847 | |
| 848 | /* pci initialization */ |
| 849 | error = pci_enable_device(pci_dev); |
| 850 | |
| 851 | if (error) |
| 852 | goto error1; |
| 853 | |
| 854 | pci_set_master(pci_dev); |
| 855 | |
Maxim Levitsky | 133fa8c | 2010-02-26 22:08:40 +0200 | [diff] [blame] | 856 | error = pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32)); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 857 | if (error) |
| 858 | goto error2; |
| 859 | |
| 860 | error = pci_request_regions(pci_dev, DRV_NAME); |
| 861 | |
| 862 | if (error) |
| 863 | goto error3; |
| 864 | |
| 865 | error = -ENOMEM; |
| 866 | |
| 867 | /* init nand chip, but register it only on card insert */ |
| 868 | chip = kzalloc(sizeof(struct nand_chip), GFP_KERNEL); |
| 869 | |
| 870 | if (!chip) |
| 871 | goto error4; |
| 872 | |
| 873 | /* commands */ |
| 874 | chip->cmd_ctrl = r852_cmdctl; |
| 875 | chip->waitfunc = r852_wait; |
| 876 | chip->dev_ready = r852_ready; |
| 877 | |
| 878 | /* I/O */ |
| 879 | chip->read_byte = r852_read_byte; |
| 880 | chip->read_buf = r852_read_buf; |
| 881 | chip->write_buf = r852_write_buf; |
| 882 | chip->verify_buf = r852_verify_buf; |
| 883 | |
| 884 | /* ecc */ |
| 885 | chip->ecc.mode = NAND_ECC_HW_SYNDROME; |
| 886 | chip->ecc.size = R852_DMA_LEN; |
| 887 | chip->ecc.bytes = SM_OOB_SIZE; |
| 888 | chip->ecc.hwctl = r852_ecc_hwctl; |
| 889 | chip->ecc.calculate = r852_ecc_calculate; |
| 890 | chip->ecc.correct = r852_ecc_correct; |
| 891 | |
| 892 | /* TODO: hack */ |
| 893 | chip->ecc.read_oob = r852_read_oob; |
| 894 | |
| 895 | /* init our device structure */ |
| 896 | dev = kzalloc(sizeof(struct r852_device), GFP_KERNEL); |
| 897 | |
| 898 | if (!dev) |
| 899 | goto error5; |
| 900 | |
| 901 | chip->priv = dev; |
| 902 | dev->chip = chip; |
| 903 | dev->pci_dev = pci_dev; |
| 904 | pci_set_drvdata(pci_dev, dev); |
| 905 | |
| 906 | dev->bounce_buffer = pci_alloc_consistent(pci_dev, R852_DMA_LEN, |
| 907 | &dev->phys_bounce_buffer); |
| 908 | |
| 909 | if (!dev->bounce_buffer) |
| 910 | goto error6; |
| 911 | |
| 912 | |
| 913 | error = -ENODEV; |
| 914 | dev->mmio = pci_ioremap_bar(pci_dev, 0); |
| 915 | |
| 916 | if (!dev->mmio) |
| 917 | goto error7; |
| 918 | |
| 919 | error = -ENOMEM; |
| 920 | dev->tmp_buffer = kzalloc(SM_SECTOR_SIZE, GFP_KERNEL); |
| 921 | |
| 922 | if (!dev->tmp_buffer) |
| 923 | goto error8; |
| 924 | |
| 925 | init_completion(&dev->dma_done); |
| 926 | |
| 927 | dev->card_workqueue = create_freezeable_workqueue(DRV_NAME); |
| 928 | |
| 929 | if (!dev->card_workqueue) |
| 930 | goto error9; |
| 931 | |
| 932 | INIT_DELAYED_WORK(&dev->card_detect_work, r852_card_detect_work); |
| 933 | |
| 934 | /* shutdown everything - precation */ |
| 935 | r852_engine_disable(dev); |
| 936 | r852_disable_irqs(dev); |
| 937 | |
| 938 | r852_dma_test(dev); |
| 939 | |
| 940 | /*register irq handler*/ |
| 941 | error = -ENODEV; |
| 942 | if (request_irq(pci_dev->irq, &r852_irq, IRQF_SHARED, |
| 943 | DRV_NAME, dev)) |
| 944 | goto error10; |
| 945 | |
| 946 | dev->irq = pci_dev->irq; |
| 947 | spin_lock_init(&dev->irqlock); |
| 948 | |
| 949 | /* kick initial present test */ |
| 950 | dev->card_detected = 0; |
| 951 | r852_card_update_present(dev); |
| 952 | queue_delayed_work(dev->card_workqueue, |
| 953 | &dev->card_detect_work, 0); |
| 954 | |
| 955 | |
| 956 | printk(KERN_NOTICE DRV_NAME ": driver loaded succesfully\n"); |
| 957 | return 0; |
| 958 | |
| 959 | error10: |
| 960 | destroy_workqueue(dev->card_workqueue); |
| 961 | error9: |
| 962 | kfree(dev->tmp_buffer); |
| 963 | error8: |
| 964 | pci_iounmap(pci_dev, dev->mmio); |
| 965 | error7: |
| 966 | pci_free_consistent(pci_dev, R852_DMA_LEN, |
| 967 | dev->bounce_buffer, dev->phys_bounce_buffer); |
| 968 | error6: |
| 969 | kfree(dev); |
| 970 | error5: |
| 971 | kfree(chip); |
| 972 | error4: |
| 973 | pci_release_regions(pci_dev); |
| 974 | error3: |
| 975 | error2: |
| 976 | pci_disable_device(pci_dev); |
| 977 | error1: |
| 978 | return error; |
| 979 | } |
| 980 | |
| 981 | void r852_remove(struct pci_dev *pci_dev) |
| 982 | { |
| 983 | struct r852_device *dev = pci_get_drvdata(pci_dev); |
| 984 | |
| 985 | /* Stop detect workqueue - |
| 986 | we are going to unregister the device anyway*/ |
| 987 | cancel_delayed_work_sync(&dev->card_detect_work); |
| 988 | destroy_workqueue(dev->card_workqueue); |
| 989 | |
| 990 | /* Unregister the device, this might make more IO */ |
| 991 | r852_unregister_nand_device(dev); |
| 992 | |
| 993 | /* Stop interrupts */ |
| 994 | r852_disable_irqs(dev); |
| 995 | synchronize_irq(dev->irq); |
| 996 | free_irq(dev->irq, dev); |
| 997 | |
| 998 | /* Cleanup */ |
| 999 | kfree(dev->tmp_buffer); |
| 1000 | pci_iounmap(pci_dev, dev->mmio); |
| 1001 | pci_free_consistent(pci_dev, R852_DMA_LEN, |
| 1002 | dev->bounce_buffer, dev->phys_bounce_buffer); |
| 1003 | |
| 1004 | kfree(dev->chip); |
| 1005 | kfree(dev); |
| 1006 | |
| 1007 | /* Shutdown the PCI device */ |
| 1008 | pci_release_regions(pci_dev); |
| 1009 | pci_disable_device(pci_dev); |
| 1010 | } |
| 1011 | |
| 1012 | void r852_shutdown(struct pci_dev *pci_dev) |
| 1013 | { |
| 1014 | struct r852_device *dev = pci_get_drvdata(pci_dev); |
| 1015 | |
| 1016 | cancel_delayed_work_sync(&dev->card_detect_work); |
| 1017 | r852_disable_irqs(dev); |
| 1018 | synchronize_irq(dev->irq); |
| 1019 | pci_disable_device(pci_dev); |
| 1020 | } |
| 1021 | |
Randy Dunlap | b2aaf7a | 2010-03-01 13:54:19 -0800 | [diff] [blame^] | 1022 | #ifdef CONFIG_PM |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1023 | int r852_suspend(struct device *device) |
| 1024 | { |
| 1025 | struct r852_device *dev = pci_get_drvdata(to_pci_dev(device)); |
| 1026 | unsigned long flags; |
| 1027 | |
| 1028 | if (dev->ctlreg & R852_CTL_CARDENABLE) |
| 1029 | return -EBUSY; |
| 1030 | |
| 1031 | /* First make sure the detect work is gone */ |
| 1032 | cancel_delayed_work_sync(&dev->card_detect_work); |
| 1033 | |
| 1034 | /* Turn off the interrupts and stop the device */ |
| 1035 | r852_disable_irqs(dev); |
| 1036 | r852_engine_disable(dev); |
| 1037 | |
| 1038 | spin_lock_irqsave(&dev->irqlock, flags); |
| 1039 | dev->insuspend = 1; |
| 1040 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 1041 | |
| 1042 | /* At that point, even if interrupt handler is running, it will quit */ |
| 1043 | /* So wait for this to happen explictly */ |
| 1044 | synchronize_irq(dev->irq); |
| 1045 | |
| 1046 | /* If card was pulled off just during the suspend, which is very |
| 1047 | unlikely, we will remove it on resume, it too late now |
| 1048 | anyway... */ |
| 1049 | dev->card_unstable = 0; |
| 1050 | |
| 1051 | pci_save_state(to_pci_dev(device)); |
| 1052 | return pci_prepare_to_sleep(to_pci_dev(device)); |
| 1053 | } |
| 1054 | |
| 1055 | int r852_resume(struct device *device) |
| 1056 | { |
| 1057 | struct r852_device *dev = pci_get_drvdata(to_pci_dev(device)); |
| 1058 | unsigned long flags; |
| 1059 | |
| 1060 | /* Turn on the hardware */ |
| 1061 | pci_back_from_sleep(to_pci_dev(device)); |
| 1062 | pci_restore_state(to_pci_dev(device)); |
| 1063 | |
| 1064 | r852_disable_irqs(dev); |
| 1065 | r852_card_update_present(dev); |
| 1066 | r852_engine_disable(dev); |
| 1067 | |
| 1068 | |
| 1069 | /* Now its safe for IRQ to run */ |
| 1070 | spin_lock_irqsave(&dev->irqlock, flags); |
| 1071 | dev->insuspend = 0; |
| 1072 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 1073 | |
| 1074 | |
| 1075 | /* If card status changed, just do the work */ |
| 1076 | if (dev->card_detected != dev->card_registred) { |
| 1077 | dbg("card was %s during low power state", |
| 1078 | dev->card_detected ? "added" : "removed"); |
| 1079 | |
| 1080 | queue_delayed_work(dev->card_workqueue, |
| 1081 | &dev->card_detect_work, 1000); |
| 1082 | return 0; |
| 1083 | } |
| 1084 | |
| 1085 | /* Otherwise, initialize the card */ |
| 1086 | if (dev->card_registred) { |
| 1087 | r852_engine_enable(dev); |
| 1088 | dev->chip->select_chip(dev->mtd, 0); |
| 1089 | dev->chip->cmdfunc(dev->mtd, NAND_CMD_RESET, -1, -1); |
| 1090 | dev->chip->select_chip(dev->mtd, -1); |
| 1091 | } |
| 1092 | |
| 1093 | /* Program card detection IRQ */ |
| 1094 | r852_update_card_detect(dev); |
| 1095 | return 0; |
| 1096 | } |
Randy Dunlap | b2aaf7a | 2010-03-01 13:54:19 -0800 | [diff] [blame^] | 1097 | #else |
| 1098 | #define r852_suspend NULL |
| 1099 | #define r852_resume NULL |
| 1100 | #endif |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1101 | |
| 1102 | static const struct pci_device_id r852_pci_id_tbl[] = { |
| 1103 | |
Maxim Levitsky | d4080cb | 2010-02-26 23:10:32 +0200 | [diff] [blame] | 1104 | { PCI_VDEVICE(RICOH, 0x0852), }, |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1105 | { }, |
| 1106 | }; |
| 1107 | |
| 1108 | MODULE_DEVICE_TABLE(pci, r852_pci_id_tbl); |
| 1109 | |
| 1110 | SIMPLE_DEV_PM_OPS(r852_pm_ops, r852_suspend, r852_resume); |
| 1111 | |
| 1112 | |
| 1113 | static struct pci_driver r852_pci_driver = { |
| 1114 | .name = DRV_NAME, |
| 1115 | .id_table = r852_pci_id_tbl, |
| 1116 | .probe = r852_probe, |
| 1117 | .remove = r852_remove, |
| 1118 | .shutdown = r852_shutdown, |
| 1119 | .driver.pm = &r852_pm_ops, |
| 1120 | }; |
| 1121 | |
| 1122 | static __init int r852_module_init(void) |
| 1123 | { |
| 1124 | return pci_register_driver(&r852_pci_driver); |
| 1125 | } |
| 1126 | |
| 1127 | static void __exit r852_module_exit(void) |
| 1128 | { |
| 1129 | pci_unregister_driver(&r852_pci_driver); |
| 1130 | } |
| 1131 | |
| 1132 | module_init(r852_module_init); |
| 1133 | module_exit(r852_module_exit); |
| 1134 | |
| 1135 | MODULE_LICENSE("GPL"); |
| 1136 | MODULE_AUTHOR("Maxim Levitsky <maximlevitsky@gmail.com>"); |
| 1137 | MODULE_DESCRIPTION("Ricoh 85xx xD/smartmedia card reader driver"); |