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> |
Randy Dunlap | f696aa4 | 2010-03-11 09:10:32 -0800 | [diff] [blame] | 15 | #include <linux/pci.h> |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 16 | #include <linux/pci_ids.h> |
Stephen Rothwell | ada4965 | 2010-03-01 20:21:06 +1100 | [diff] [blame] | 17 | #include <linux/delay.h> |
Tejun Heo | 05d71b46 | 2010-03-30 02:52:39 +0900 | [diff] [blame] | 18 | #include <linux/slab.h> |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 19 | #include <asm/byteorder.h> |
| 20 | #include <linux/sched.h> |
| 21 | #include "sm_common.h" |
| 22 | #include "r852.h" |
| 23 | |
| 24 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 25 | static bool r852_enable_dma = 1; |
Stephen Rothwell | ada4965 | 2010-03-01 20:21:06 +1100 | [diff] [blame] | 26 | module_param(r852_enable_dma, bool, S_IRUGO); |
| 27 | MODULE_PARM_DESC(r852_enable_dma, "Enable usage of the DMA (default)"); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 28 | |
| 29 | static int debug; |
| 30 | module_param(debug, int, S_IRUGO | S_IWUSR); |
| 31 | MODULE_PARM_DESC(debug, "Debug level (0-2)"); |
| 32 | |
| 33 | /* read register */ |
| 34 | static inline uint8_t r852_read_reg(struct r852_device *dev, int address) |
| 35 | { |
| 36 | uint8_t reg = readb(dev->mmio + address); |
| 37 | return reg; |
| 38 | } |
| 39 | |
| 40 | /* write register */ |
| 41 | static inline void r852_write_reg(struct r852_device *dev, |
| 42 | int address, uint8_t value) |
| 43 | { |
| 44 | writeb(value, dev->mmio + address); |
| 45 | mmiowb(); |
| 46 | } |
| 47 | |
| 48 | |
| 49 | /* read dword sized register */ |
| 50 | static inline uint32_t r852_read_reg_dword(struct r852_device *dev, int address) |
| 51 | { |
| 52 | uint32_t reg = le32_to_cpu(readl(dev->mmio + address)); |
| 53 | return reg; |
| 54 | } |
| 55 | |
| 56 | /* write dword sized register */ |
| 57 | static inline void r852_write_reg_dword(struct r852_device *dev, |
| 58 | int address, uint32_t value) |
| 59 | { |
| 60 | writel(cpu_to_le32(value), dev->mmio + address); |
| 61 | mmiowb(); |
| 62 | } |
| 63 | |
| 64 | /* returns pointer to our private structure */ |
| 65 | static inline struct r852_device *r852_get_dev(struct mtd_info *mtd) |
| 66 | { |
Kulikov Vasiliy | d5af6dc | 2010-06-29 14:14:57 +0400 | [diff] [blame] | 67 | struct nand_chip *chip = mtd->priv; |
| 68 | return chip->priv; |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 69 | } |
| 70 | |
| 71 | |
| 72 | /* check if controller supports dma */ |
| 73 | static void r852_dma_test(struct r852_device *dev) |
| 74 | { |
| 75 | dev->dma_usable = (r852_read_reg(dev, R852_DMA_CAP) & |
| 76 | (R852_DMA1 | R852_DMA2)) == (R852_DMA1 | R852_DMA2); |
| 77 | |
| 78 | if (!dev->dma_usable) |
| 79 | message("Non dma capable device detected, dma disabled"); |
| 80 | |
Stephen Rothwell | ada4965 | 2010-03-01 20:21:06 +1100 | [diff] [blame] | 81 | if (!r852_enable_dma) { |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 82 | message("disabling dma on user request"); |
| 83 | dev->dma_usable = 0; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | /* |
| 88 | * Enable dma. Enables ether first or second stage of the DMA, |
| 89 | * Expects dev->dma_dir and dev->dma_state be set |
| 90 | */ |
| 91 | static void r852_dma_enable(struct r852_device *dev) |
| 92 | { |
| 93 | uint8_t dma_reg, dma_irq_reg; |
| 94 | |
| 95 | /* Set up dma settings */ |
| 96 | dma_reg = r852_read_reg_dword(dev, R852_DMA_SETTINGS); |
| 97 | dma_reg &= ~(R852_DMA_READ | R852_DMA_INTERNAL | R852_DMA_MEMORY); |
| 98 | |
| 99 | if (dev->dma_dir) |
| 100 | dma_reg |= R852_DMA_READ; |
| 101 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 102 | if (dev->dma_state == DMA_INTERNAL) { |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 103 | dma_reg |= R852_DMA_INTERNAL; |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 104 | /* Precaution to make sure HW doesn't write */ |
| 105 | /* to random kernel memory */ |
| 106 | r852_write_reg_dword(dev, R852_DMA_ADDR, |
| 107 | cpu_to_le32(dev->phys_bounce_buffer)); |
| 108 | } else { |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 109 | dma_reg |= R852_DMA_MEMORY; |
| 110 | r852_write_reg_dword(dev, R852_DMA_ADDR, |
| 111 | cpu_to_le32(dev->phys_dma_addr)); |
| 112 | } |
| 113 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 114 | /* Precaution: make sure write reached the device */ |
| 115 | r852_read_reg_dword(dev, R852_DMA_ADDR); |
| 116 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 117 | r852_write_reg_dword(dev, R852_DMA_SETTINGS, dma_reg); |
| 118 | |
| 119 | /* Set dma irq */ |
| 120 | dma_irq_reg = r852_read_reg_dword(dev, R852_DMA_IRQ_ENABLE); |
| 121 | r852_write_reg_dword(dev, R852_DMA_IRQ_ENABLE, |
| 122 | dma_irq_reg | |
| 123 | R852_DMA_IRQ_INTERNAL | |
| 124 | R852_DMA_IRQ_ERROR | |
| 125 | R852_DMA_IRQ_MEMORY); |
| 126 | } |
| 127 | |
| 128 | /* |
| 129 | * Disable dma, called from the interrupt handler, which specifies |
| 130 | * success of the operation via 'error' argument |
| 131 | */ |
| 132 | static void r852_dma_done(struct r852_device *dev, int error) |
| 133 | { |
| 134 | WARN_ON(dev->dma_stage == 0); |
| 135 | |
| 136 | r852_write_reg_dword(dev, R852_DMA_IRQ_STA, |
| 137 | r852_read_reg_dword(dev, R852_DMA_IRQ_STA)); |
| 138 | |
| 139 | r852_write_reg_dword(dev, R852_DMA_SETTINGS, 0); |
| 140 | r852_write_reg_dword(dev, R852_DMA_IRQ_ENABLE, 0); |
| 141 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 142 | /* Precaution to make sure HW doesn't write to random kernel memory */ |
| 143 | r852_write_reg_dword(dev, R852_DMA_ADDR, |
| 144 | cpu_to_le32(dev->phys_bounce_buffer)); |
| 145 | r852_read_reg_dword(dev, R852_DMA_ADDR); |
| 146 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 147 | dev->dma_error = error; |
| 148 | dev->dma_stage = 0; |
| 149 | |
| 150 | if (dev->phys_dma_addr && dev->phys_dma_addr != dev->phys_bounce_buffer) |
| 151 | pci_unmap_single(dev->pci_dev, dev->phys_dma_addr, R852_DMA_LEN, |
| 152 | dev->dma_dir ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | /* |
| 156 | * Wait, till dma is done, which includes both phases of it |
| 157 | */ |
| 158 | static int r852_dma_wait(struct r852_device *dev) |
| 159 | { |
| 160 | long timeout = wait_for_completion_timeout(&dev->dma_done, |
| 161 | msecs_to_jiffies(1000)); |
| 162 | if (!timeout) { |
| 163 | dbg("timeout waiting for DMA interrupt"); |
| 164 | return -ETIMEDOUT; |
| 165 | } |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * Read/Write one page using dma. Only pages can be read (512 bytes) |
| 172 | */ |
| 173 | static void r852_do_dma(struct r852_device *dev, uint8_t *buf, int do_read) |
| 174 | { |
| 175 | int bounce = 0; |
| 176 | unsigned long flags; |
| 177 | int error; |
| 178 | |
| 179 | dev->dma_error = 0; |
| 180 | |
| 181 | /* Set dma direction */ |
| 182 | dev->dma_dir = do_read; |
| 183 | dev->dma_stage = 1; |
Wolfram Sang | 16735d0 | 2013-11-14 14:32:02 -0800 | [diff] [blame] | 184 | reinit_completion(&dev->dma_done); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 185 | |
| 186 | dbg_verbose("doing dma %s ", do_read ? "read" : "write"); |
| 187 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 188 | /* Set initial dma state: for reading first fill on board buffer, |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 189 | from device, for writes first fill the buffer from memory*/ |
| 190 | dev->dma_state = do_read ? DMA_INTERNAL : DMA_MEMORY; |
| 191 | |
| 192 | /* if incoming buffer is not page aligned, we should do bounce */ |
| 193 | if ((unsigned long)buf & (R852_DMA_LEN-1)) |
| 194 | bounce = 1; |
| 195 | |
| 196 | if (!bounce) { |
| 197 | dev->phys_dma_addr = pci_map_single(dev->pci_dev, (void *)buf, |
| 198 | R852_DMA_LEN, |
| 199 | (do_read ? PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE)); |
| 200 | |
David Woodhouse | 0c82d3c | 2010-03-11 09:25:14 -0800 | [diff] [blame] | 201 | if (pci_dma_mapping_error(dev->pci_dev, dev->phys_dma_addr)) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 202 | bounce = 1; |
| 203 | } |
| 204 | |
| 205 | if (bounce) { |
| 206 | dbg_verbose("dma: using bounce buffer"); |
| 207 | dev->phys_dma_addr = dev->phys_bounce_buffer; |
| 208 | if (!do_read) |
| 209 | memcpy(dev->bounce_buffer, buf, R852_DMA_LEN); |
| 210 | } |
| 211 | |
| 212 | /* Enable DMA */ |
| 213 | spin_lock_irqsave(&dev->irqlock, flags); |
| 214 | r852_dma_enable(dev); |
| 215 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 216 | |
| 217 | /* Wait till complete */ |
| 218 | error = r852_dma_wait(dev); |
| 219 | |
| 220 | if (error) { |
| 221 | r852_dma_done(dev, error); |
| 222 | return; |
| 223 | } |
| 224 | |
| 225 | if (do_read && bounce) |
| 226 | memcpy((void *)buf, dev->bounce_buffer, R852_DMA_LEN); |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * Program data lines of the nand chip to send data to it |
| 231 | */ |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 232 | static void r852_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 233 | { |
| 234 | struct r852_device *dev = r852_get_dev(mtd); |
| 235 | uint32_t reg; |
| 236 | |
| 237 | /* Don't allow any access to hardware if we suspect card removal */ |
| 238 | if (dev->card_unstable) |
| 239 | return; |
| 240 | |
| 241 | /* Special case for whole sector read */ |
| 242 | if (len == R852_DMA_LEN && dev->dma_usable) { |
| 243 | r852_do_dma(dev, (uint8_t *)buf, 0); |
| 244 | return; |
| 245 | } |
| 246 | |
| 247 | /* write DWORD chinks - faster */ |
| 248 | while (len) { |
| 249 | reg = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24; |
| 250 | r852_write_reg_dword(dev, R852_DATALINE, reg); |
| 251 | buf += 4; |
| 252 | len -= 4; |
| 253 | |
| 254 | } |
| 255 | |
| 256 | /* write rest */ |
| 257 | while (len) |
| 258 | r852_write_reg(dev, R852_DATALINE, *buf++); |
| 259 | } |
| 260 | |
| 261 | /* |
| 262 | * Read data lines of the nand chip to retrieve data |
| 263 | */ |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 264 | static void r852_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 265 | { |
| 266 | struct r852_device *dev = r852_get_dev(mtd); |
| 267 | uint32_t reg; |
| 268 | |
| 269 | if (dev->card_unstable) { |
| 270 | /* since we can't signal error here, at least, return |
| 271 | predictable buffer */ |
| 272 | memset(buf, 0, len); |
| 273 | return; |
| 274 | } |
| 275 | |
| 276 | /* special case for whole sector read */ |
| 277 | if (len == R852_DMA_LEN && dev->dma_usable) { |
| 278 | r852_do_dma(dev, buf, 1); |
| 279 | return; |
| 280 | } |
| 281 | |
| 282 | /* read in dword sized chunks */ |
| 283 | while (len >= 4) { |
| 284 | |
| 285 | reg = r852_read_reg_dword(dev, R852_DATALINE); |
| 286 | *buf++ = reg & 0xFF; |
| 287 | *buf++ = (reg >> 8) & 0xFF; |
| 288 | *buf++ = (reg >> 16) & 0xFF; |
| 289 | *buf++ = (reg >> 24) & 0xFF; |
| 290 | len -= 4; |
| 291 | } |
| 292 | |
| 293 | /* read the reset by bytes */ |
| 294 | while (len--) |
| 295 | *buf++ = r852_read_reg(dev, R852_DATALINE); |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * Read one byte from nand chip |
| 300 | */ |
| 301 | static uint8_t r852_read_byte(struct mtd_info *mtd) |
| 302 | { |
| 303 | struct r852_device *dev = r852_get_dev(mtd); |
| 304 | |
| 305 | /* Same problem as in r852_read_buf.... */ |
| 306 | if (dev->card_unstable) |
| 307 | return 0; |
| 308 | |
| 309 | return r852_read_reg(dev, R852_DATALINE); |
| 310 | } |
| 311 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 312 | /* |
| 313 | * Control several chip lines & send commands |
| 314 | */ |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 315 | static void r852_cmdctl(struct mtd_info *mtd, int dat, unsigned int ctrl) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 316 | { |
| 317 | struct r852_device *dev = r852_get_dev(mtd); |
| 318 | |
| 319 | if (dev->card_unstable) |
| 320 | return; |
| 321 | |
| 322 | if (ctrl & NAND_CTRL_CHANGE) { |
| 323 | |
| 324 | dev->ctlreg &= ~(R852_CTL_DATA | R852_CTL_COMMAND | |
| 325 | R852_CTL_ON | R852_CTL_CARDENABLE); |
| 326 | |
| 327 | if (ctrl & NAND_ALE) |
| 328 | dev->ctlreg |= R852_CTL_DATA; |
| 329 | |
| 330 | if (ctrl & NAND_CLE) |
| 331 | dev->ctlreg |= R852_CTL_COMMAND; |
| 332 | |
| 333 | if (ctrl & NAND_NCE) |
| 334 | dev->ctlreg |= (R852_CTL_CARDENABLE | R852_CTL_ON); |
| 335 | else |
| 336 | dev->ctlreg &= ~R852_CTL_WRITE; |
| 337 | |
| 338 | /* when write is stareted, enable write access */ |
| 339 | if (dat == NAND_CMD_ERASE1) |
| 340 | dev->ctlreg |= R852_CTL_WRITE; |
| 341 | |
| 342 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 343 | } |
| 344 | |
| 345 | /* HACK: NAND_CMD_SEQIN is called without NAND_CTRL_CHANGE, but we need |
| 346 | to set write mode */ |
| 347 | if (dat == NAND_CMD_SEQIN && (dev->ctlreg & R852_CTL_COMMAND)) { |
| 348 | dev->ctlreg |= R852_CTL_WRITE; |
| 349 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 350 | } |
| 351 | |
| 352 | if (dat != NAND_CMD_NONE) |
| 353 | r852_write_reg(dev, R852_DATALINE, dat); |
| 354 | } |
| 355 | |
| 356 | /* |
| 357 | * Wait till card is ready. |
| 358 | * based on nand_wait, but returns errors on DMA error |
| 359 | */ |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 360 | static int r852_wait(struct mtd_info *mtd, struct nand_chip *chip) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 361 | { |
Kulikov Vasiliy | 029919c | 2010-06-29 14:15:20 +0400 | [diff] [blame] | 362 | struct r852_device *dev = chip->priv; |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 363 | |
| 364 | unsigned long timeout; |
| 365 | int status; |
| 366 | |
| 367 | timeout = jiffies + (chip->state == FL_ERASING ? |
| 368 | msecs_to_jiffies(400) : msecs_to_jiffies(20)); |
| 369 | |
| 370 | while (time_before(jiffies, timeout)) |
| 371 | if (chip->dev_ready(mtd)) |
| 372 | break; |
| 373 | |
| 374 | chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); |
| 375 | status = (int)chip->read_byte(mtd); |
| 376 | |
| 377 | /* Unfortunelly, no way to send detailed error status... */ |
| 378 | if (dev->dma_error) { |
| 379 | status |= NAND_STATUS_FAIL; |
| 380 | dev->dma_error = 0; |
| 381 | } |
| 382 | return status; |
| 383 | } |
| 384 | |
| 385 | /* |
| 386 | * Check if card is ready |
| 387 | */ |
| 388 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 389 | static int r852_ready(struct mtd_info *mtd) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 390 | { |
| 391 | struct r852_device *dev = r852_get_dev(mtd); |
| 392 | return !(r852_read_reg(dev, R852_CARD_STA) & R852_CARD_STA_BUSY); |
| 393 | } |
| 394 | |
| 395 | |
| 396 | /* |
| 397 | * Set ECC engine mode |
| 398 | */ |
| 399 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 400 | static void r852_ecc_hwctl(struct mtd_info *mtd, int mode) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 401 | { |
| 402 | struct r852_device *dev = r852_get_dev(mtd); |
| 403 | |
| 404 | if (dev->card_unstable) |
| 405 | return; |
| 406 | |
| 407 | switch (mode) { |
| 408 | case NAND_ECC_READ: |
| 409 | case NAND_ECC_WRITE: |
| 410 | /* enable ecc generation/check*/ |
| 411 | dev->ctlreg |= R852_CTL_ECC_ENABLE; |
| 412 | |
| 413 | /* flush ecc buffer */ |
| 414 | r852_write_reg(dev, R852_CTL, |
| 415 | dev->ctlreg | R852_CTL_ECC_ACCESS); |
| 416 | |
| 417 | r852_read_reg_dword(dev, R852_DATALINE); |
| 418 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 419 | return; |
| 420 | |
| 421 | case NAND_ECC_READSYN: |
| 422 | /* disable ecc generation */ |
| 423 | dev->ctlreg &= ~R852_CTL_ECC_ENABLE; |
| 424 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | /* |
| 429 | * Calculate ECC, only used for writes |
| 430 | */ |
| 431 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 432 | static int r852_ecc_calculate(struct mtd_info *mtd, const uint8_t *dat, |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 433 | uint8_t *ecc_code) |
| 434 | { |
| 435 | struct r852_device *dev = r852_get_dev(mtd); |
| 436 | struct sm_oob *oob = (struct sm_oob *)ecc_code; |
| 437 | uint32_t ecc1, ecc2; |
| 438 | |
| 439 | if (dev->card_unstable) |
| 440 | return 0; |
| 441 | |
| 442 | dev->ctlreg &= ~R852_CTL_ECC_ENABLE; |
| 443 | r852_write_reg(dev, R852_CTL, dev->ctlreg | R852_CTL_ECC_ACCESS); |
| 444 | |
| 445 | ecc1 = r852_read_reg_dword(dev, R852_DATALINE); |
| 446 | ecc2 = r852_read_reg_dword(dev, R852_DATALINE); |
| 447 | |
| 448 | oob->ecc1[0] = (ecc1) & 0xFF; |
| 449 | oob->ecc1[1] = (ecc1 >> 8) & 0xFF; |
| 450 | oob->ecc1[2] = (ecc1 >> 16) & 0xFF; |
| 451 | |
| 452 | oob->ecc2[0] = (ecc2) & 0xFF; |
| 453 | oob->ecc2[1] = (ecc2 >> 8) & 0xFF; |
| 454 | oob->ecc2[2] = (ecc2 >> 16) & 0xFF; |
| 455 | |
| 456 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 457 | return 0; |
| 458 | } |
| 459 | |
| 460 | /* |
| 461 | * Correct the data using ECC, hw did almost everything for us |
| 462 | */ |
| 463 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 464 | static int r852_ecc_correct(struct mtd_info *mtd, uint8_t *dat, |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 465 | uint8_t *read_ecc, uint8_t *calc_ecc) |
| 466 | { |
| 467 | uint16_t ecc_reg; |
| 468 | uint8_t ecc_status, err_byte; |
| 469 | int i, error = 0; |
| 470 | |
| 471 | struct r852_device *dev = r852_get_dev(mtd); |
| 472 | |
| 473 | if (dev->card_unstable) |
| 474 | return 0; |
| 475 | |
Maxim Levitsky | 9489be8 | 2010-06-02 16:01:46 +0300 | [diff] [blame] | 476 | if (dev->dma_error) { |
| 477 | dev->dma_error = 0; |
| 478 | return -1; |
| 479 | } |
| 480 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 481 | r852_write_reg(dev, R852_CTL, dev->ctlreg | R852_CTL_ECC_ACCESS); |
| 482 | ecc_reg = r852_read_reg_dword(dev, R852_DATALINE); |
| 483 | r852_write_reg(dev, R852_CTL, dev->ctlreg); |
| 484 | |
| 485 | for (i = 0 ; i <= 1 ; i++) { |
| 486 | |
| 487 | ecc_status = (ecc_reg >> 8) & 0xFF; |
| 488 | |
| 489 | /* ecc uncorrectable error */ |
| 490 | if (ecc_status & R852_ECC_FAIL) { |
| 491 | dbg("ecc: unrecoverable error, in half %d", i); |
| 492 | error = -1; |
| 493 | goto exit; |
| 494 | } |
| 495 | |
| 496 | /* correctable error */ |
| 497 | if (ecc_status & R852_ECC_CORRECTABLE) { |
| 498 | |
| 499 | err_byte = ecc_reg & 0xFF; |
| 500 | dbg("ecc: recoverable error, " |
| 501 | "in half %d, byte %d, bit %d", i, |
| 502 | err_byte, ecc_status & R852_ECC_ERR_BIT_MSK); |
| 503 | |
| 504 | dat[err_byte] ^= |
| 505 | 1 << (ecc_status & R852_ECC_ERR_BIT_MSK); |
| 506 | error++; |
| 507 | } |
| 508 | |
| 509 | dat += 256; |
| 510 | ecc_reg >>= 16; |
| 511 | } |
| 512 | exit: |
| 513 | return error; |
| 514 | } |
| 515 | |
| 516 | /* |
| 517 | * This is copy of nand_read_oob_std |
| 518 | * nand_read_oob_syndrome assumes we can send column address - we can't |
| 519 | */ |
| 520 | static int r852_read_oob(struct mtd_info *mtd, struct nand_chip *chip, |
Shmulik Ladkani | 5c2ffb1 | 2012-05-09 13:06:35 +0300 | [diff] [blame] | 521 | int page) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 522 | { |
Shmulik Ladkani | 5c2ffb1 | 2012-05-09 13:06:35 +0300 | [diff] [blame] | 523 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 524 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); |
Shmulik Ladkani | 5c2ffb1 | 2012-05-09 13:06:35 +0300 | [diff] [blame] | 525 | return 0; |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Start the nand engine |
| 530 | */ |
| 531 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 532 | static void r852_engine_enable(struct r852_device *dev) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 533 | { |
| 534 | if (r852_read_reg_dword(dev, R852_HW) & R852_HW_UNKNOWN) { |
| 535 | r852_write_reg(dev, R852_CTL, R852_CTL_RESET | R852_CTL_ON); |
| 536 | r852_write_reg_dword(dev, R852_HW, R852_HW_ENABLED); |
| 537 | } else { |
| 538 | r852_write_reg_dword(dev, R852_HW, R852_HW_ENABLED); |
| 539 | r852_write_reg(dev, R852_CTL, R852_CTL_RESET | R852_CTL_ON); |
| 540 | } |
| 541 | msleep(300); |
| 542 | r852_write_reg(dev, R852_CTL, 0); |
| 543 | } |
| 544 | |
| 545 | |
| 546 | /* |
| 547 | * Stop the nand engine |
| 548 | */ |
| 549 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 550 | static void r852_engine_disable(struct r852_device *dev) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 551 | { |
| 552 | r852_write_reg_dword(dev, R852_HW, 0); |
| 553 | r852_write_reg(dev, R852_CTL, R852_CTL_RESET); |
| 554 | } |
| 555 | |
| 556 | /* |
| 557 | * Test if card is present |
| 558 | */ |
| 559 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 560 | static void r852_card_update_present(struct r852_device *dev) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 561 | { |
| 562 | unsigned long flags; |
| 563 | uint8_t reg; |
| 564 | |
| 565 | spin_lock_irqsave(&dev->irqlock, flags); |
| 566 | reg = r852_read_reg(dev, R852_CARD_STA); |
| 567 | dev->card_detected = !!(reg & R852_CARD_STA_PRESENT); |
| 568 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | * Update card detection IRQ state according to current card state |
| 573 | * which is read in r852_card_update_present |
| 574 | */ |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 575 | static void r852_update_card_detect(struct r852_device *dev) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 576 | { |
| 577 | int card_detect_reg = r852_read_reg(dev, R852_CARD_IRQ_ENABLE); |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 578 | dev->card_unstable = 0; |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 579 | |
| 580 | card_detect_reg &= ~(R852_CARD_IRQ_REMOVE | R852_CARD_IRQ_INSERT); |
| 581 | card_detect_reg |= R852_CARD_IRQ_GENABLE; |
| 582 | |
| 583 | card_detect_reg |= dev->card_detected ? |
| 584 | R852_CARD_IRQ_REMOVE : R852_CARD_IRQ_INSERT; |
| 585 | |
| 586 | r852_write_reg(dev, R852_CARD_IRQ_ENABLE, card_detect_reg); |
| 587 | } |
| 588 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 589 | static ssize_t r852_media_type_show(struct device *sys_dev, |
| 590 | struct device_attribute *attr, char *buf) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 591 | { |
| 592 | struct mtd_info *mtd = container_of(sys_dev, struct mtd_info, dev); |
| 593 | struct r852_device *dev = r852_get_dev(mtd); |
| 594 | char *data = dev->sm ? "smartmedia" : "xd"; |
| 595 | |
| 596 | strcpy(buf, data); |
| 597 | return strlen(data); |
| 598 | } |
| 599 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 600 | static DEVICE_ATTR(media_type, S_IRUGO, r852_media_type_show, NULL); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 601 | |
| 602 | |
| 603 | /* Detect properties of card in slot */ |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 604 | static void r852_update_media_status(struct r852_device *dev) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 605 | { |
| 606 | uint8_t reg; |
| 607 | unsigned long flags; |
| 608 | int readonly; |
| 609 | |
| 610 | spin_lock_irqsave(&dev->irqlock, flags); |
| 611 | if (!dev->card_detected) { |
| 612 | message("card removed"); |
| 613 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 614 | return ; |
| 615 | } |
| 616 | |
| 617 | readonly = r852_read_reg(dev, R852_CARD_STA) & R852_CARD_STA_RO; |
| 618 | reg = r852_read_reg(dev, R852_DMA_CAP); |
| 619 | dev->sm = (reg & (R852_DMA1 | R852_DMA2)) && (reg & R852_SMBIT); |
| 620 | |
| 621 | message("detected %s %s card in slot", |
| 622 | dev->sm ? "SmartMedia" : "xD", |
| 623 | readonly ? "readonly" : "writeable"); |
| 624 | |
| 625 | dev->readonly = readonly; |
| 626 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 627 | } |
| 628 | |
| 629 | /* |
| 630 | * Register the nand device |
| 631 | * Called when the card is detected |
| 632 | */ |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 633 | static int r852_register_nand_device(struct r852_device *dev) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 634 | { |
| 635 | dev->mtd = kzalloc(sizeof(struct mtd_info), GFP_KERNEL); |
| 636 | |
| 637 | if (!dev->mtd) |
| 638 | goto error1; |
| 639 | |
| 640 | WARN_ON(dev->card_registred); |
| 641 | |
| 642 | dev->mtd->owner = THIS_MODULE; |
| 643 | dev->mtd->priv = dev->chip; |
| 644 | dev->mtd->dev.parent = &dev->pci_dev->dev; |
| 645 | |
| 646 | if (dev->readonly) |
| 647 | dev->chip->options |= NAND_ROM; |
| 648 | |
| 649 | r852_engine_enable(dev); |
| 650 | |
Maxim Levitsky | c361157 | 2010-04-19 18:20:41 +0300 | [diff] [blame] | 651 | if (sm_register_device(dev->mtd, dev->sm)) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 652 | goto error2; |
| 653 | |
Maxim Levitsky | 133fa8c | 2010-02-26 22:08:40 +0200 | [diff] [blame] | 654 | if (device_create_file(&dev->mtd->dev, &dev_attr_media_type)) |
| 655 | message("can't create media type sysfs attribute"); |
| 656 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 657 | dev->card_registred = 1; |
| 658 | return 0; |
| 659 | error2: |
| 660 | kfree(dev->mtd); |
| 661 | error1: |
| 662 | /* Force card redetect */ |
| 663 | dev->card_detected = 0; |
| 664 | return -1; |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * Unregister the card |
| 669 | */ |
| 670 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 671 | static void r852_unregister_nand_device(struct r852_device *dev) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 672 | { |
| 673 | if (!dev->card_registred) |
| 674 | return; |
| 675 | |
| 676 | device_remove_file(&dev->mtd->dev, &dev_attr_media_type); |
| 677 | nand_release(dev->mtd); |
| 678 | r852_engine_disable(dev); |
| 679 | dev->card_registred = 0; |
| 680 | kfree(dev->mtd); |
| 681 | dev->mtd = NULL; |
| 682 | } |
| 683 | |
| 684 | /* Card state updater */ |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 685 | static void r852_card_detect_work(struct work_struct *work) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 686 | { |
| 687 | struct r852_device *dev = |
| 688 | container_of(work, struct r852_device, card_detect_work.work); |
| 689 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 690 | r852_card_update_present(dev); |
Maxim Levitsky | ac373f7 | 2010-06-02 16:01:47 +0300 | [diff] [blame] | 691 | r852_update_card_detect(dev); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 692 | dev->card_unstable = 0; |
| 693 | |
Maxim Levitsky | fb45d32 | 2010-02-27 02:04:02 +0200 | [diff] [blame] | 694 | /* False alarm */ |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 695 | if (dev->card_detected == dev->card_registred) |
| 696 | goto exit; |
| 697 | |
| 698 | /* Read media properties */ |
| 699 | r852_update_media_status(dev); |
| 700 | |
| 701 | /* Register the card */ |
| 702 | if (dev->card_detected) |
| 703 | r852_register_nand_device(dev); |
| 704 | else |
| 705 | r852_unregister_nand_device(dev); |
| 706 | exit: |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 707 | r852_update_card_detect(dev); |
| 708 | } |
| 709 | |
| 710 | /* Ack + disable IRQ generation */ |
| 711 | static void r852_disable_irqs(struct r852_device *dev) |
| 712 | { |
| 713 | uint8_t reg; |
| 714 | reg = r852_read_reg(dev, R852_CARD_IRQ_ENABLE); |
| 715 | r852_write_reg(dev, R852_CARD_IRQ_ENABLE, reg & ~R852_CARD_IRQ_MASK); |
| 716 | |
| 717 | reg = r852_read_reg_dword(dev, R852_DMA_IRQ_ENABLE); |
| 718 | r852_write_reg_dword(dev, R852_DMA_IRQ_ENABLE, |
| 719 | reg & ~R852_DMA_IRQ_MASK); |
| 720 | |
| 721 | r852_write_reg(dev, R852_CARD_IRQ_STA, R852_CARD_IRQ_MASK); |
| 722 | r852_write_reg_dword(dev, R852_DMA_IRQ_STA, R852_DMA_IRQ_MASK); |
| 723 | } |
| 724 | |
| 725 | /* Interrupt handler */ |
| 726 | static irqreturn_t r852_irq(int irq, void *data) |
| 727 | { |
| 728 | struct r852_device *dev = (struct r852_device *)data; |
| 729 | |
| 730 | uint8_t card_status, dma_status; |
| 731 | unsigned long flags; |
| 732 | irqreturn_t ret = IRQ_NONE; |
| 733 | |
| 734 | spin_lock_irqsave(&dev->irqlock, flags); |
| 735 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 736 | /* handle card detection interrupts first */ |
| 737 | card_status = r852_read_reg(dev, R852_CARD_IRQ_STA); |
| 738 | r852_write_reg(dev, R852_CARD_IRQ_STA, card_status); |
| 739 | |
| 740 | if (card_status & (R852_CARD_IRQ_INSERT|R852_CARD_IRQ_REMOVE)) { |
| 741 | |
| 742 | ret = IRQ_HANDLED; |
| 743 | dev->card_detected = !!(card_status & R852_CARD_IRQ_INSERT); |
| 744 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 745 | /* we shouldn't receive any interrupts if we wait for card |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 746 | to settle */ |
| 747 | WARN_ON(dev->card_unstable); |
| 748 | |
| 749 | /* disable irqs while card is unstable */ |
| 750 | /* this will timeout DMA if active, but better that garbage */ |
| 751 | r852_disable_irqs(dev); |
| 752 | |
| 753 | if (dev->card_unstable) |
| 754 | goto out; |
| 755 | |
| 756 | /* let, card state to settle a bit, and then do the work */ |
| 757 | dev->card_unstable = 1; |
| 758 | queue_delayed_work(dev->card_workqueue, |
| 759 | &dev->card_detect_work, msecs_to_jiffies(100)); |
| 760 | goto out; |
| 761 | } |
| 762 | |
| 763 | |
| 764 | /* Handle dma interrupts */ |
| 765 | dma_status = r852_read_reg_dword(dev, R852_DMA_IRQ_STA); |
| 766 | r852_write_reg_dword(dev, R852_DMA_IRQ_STA, dma_status); |
| 767 | |
| 768 | if (dma_status & R852_DMA_IRQ_MASK) { |
| 769 | |
| 770 | ret = IRQ_HANDLED; |
| 771 | |
| 772 | if (dma_status & R852_DMA_IRQ_ERROR) { |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 773 | dbg("received dma error IRQ"); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 774 | r852_dma_done(dev, -EIO); |
Maxim Levitsky | 9489be8 | 2010-06-02 16:01:46 +0300 | [diff] [blame] | 775 | complete(&dev->dma_done); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 776 | goto out; |
| 777 | } |
| 778 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 779 | /* received DMA interrupt out of nowhere? */ |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 780 | WARN_ON_ONCE(dev->dma_stage == 0); |
| 781 | |
| 782 | if (dev->dma_stage == 0) |
| 783 | goto out; |
| 784 | |
| 785 | /* done device access */ |
| 786 | if (dev->dma_state == DMA_INTERNAL && |
| 787 | (dma_status & R852_DMA_IRQ_INTERNAL)) { |
| 788 | |
| 789 | dev->dma_state = DMA_MEMORY; |
| 790 | dev->dma_stage++; |
| 791 | } |
| 792 | |
| 793 | /* done memory DMA */ |
| 794 | if (dev->dma_state == DMA_MEMORY && |
| 795 | (dma_status & R852_DMA_IRQ_MEMORY)) { |
| 796 | dev->dma_state = DMA_INTERNAL; |
| 797 | dev->dma_stage++; |
| 798 | } |
| 799 | |
| 800 | /* Enable 2nd half of dma dance */ |
| 801 | if (dev->dma_stage == 2) |
| 802 | r852_dma_enable(dev); |
| 803 | |
| 804 | /* Operation done */ |
Maxim Levitsky | 9489be8 | 2010-06-02 16:01:46 +0300 | [diff] [blame] | 805 | if (dev->dma_stage == 3) { |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 806 | r852_dma_done(dev, 0); |
Maxim Levitsky | 9489be8 | 2010-06-02 16:01:46 +0300 | [diff] [blame] | 807 | complete(&dev->dma_done); |
| 808 | } |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 809 | goto out; |
| 810 | } |
| 811 | |
| 812 | /* Handle unknown interrupts */ |
| 813 | if (dma_status) |
| 814 | dbg("bad dma IRQ status = %x", dma_status); |
| 815 | |
| 816 | if (card_status & ~R852_CARD_STA_CD) |
| 817 | dbg("strange card status = %x", card_status); |
| 818 | |
| 819 | out: |
| 820 | spin_unlock_irqrestore(&dev->irqlock, flags); |
| 821 | return ret; |
| 822 | } |
| 823 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 824 | static int r852_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 825 | { |
| 826 | int error; |
| 827 | struct nand_chip *chip; |
| 828 | struct r852_device *dev; |
| 829 | |
| 830 | /* pci initialization */ |
| 831 | error = pci_enable_device(pci_dev); |
| 832 | |
| 833 | if (error) |
| 834 | goto error1; |
| 835 | |
| 836 | pci_set_master(pci_dev); |
| 837 | |
Maxim Levitsky | 133fa8c | 2010-02-26 22:08:40 +0200 | [diff] [blame] | 838 | error = pci_set_dma_mask(pci_dev, DMA_BIT_MASK(32)); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 839 | if (error) |
| 840 | goto error2; |
| 841 | |
| 842 | error = pci_request_regions(pci_dev, DRV_NAME); |
| 843 | |
| 844 | if (error) |
| 845 | goto error3; |
| 846 | |
| 847 | error = -ENOMEM; |
| 848 | |
| 849 | /* init nand chip, but register it only on card insert */ |
| 850 | chip = kzalloc(sizeof(struct nand_chip), GFP_KERNEL); |
| 851 | |
| 852 | if (!chip) |
| 853 | goto error4; |
| 854 | |
| 855 | /* commands */ |
| 856 | chip->cmd_ctrl = r852_cmdctl; |
| 857 | chip->waitfunc = r852_wait; |
| 858 | chip->dev_ready = r852_ready; |
| 859 | |
| 860 | /* I/O */ |
| 861 | chip->read_byte = r852_read_byte; |
| 862 | chip->read_buf = r852_read_buf; |
| 863 | chip->write_buf = r852_write_buf; |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 864 | |
| 865 | /* ecc */ |
| 866 | chip->ecc.mode = NAND_ECC_HW_SYNDROME; |
| 867 | chip->ecc.size = R852_DMA_LEN; |
| 868 | chip->ecc.bytes = SM_OOB_SIZE; |
Mike Dunn | 6a918ba | 2012-03-11 14:21:11 -0700 | [diff] [blame] | 869 | chip->ecc.strength = 2; |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 870 | chip->ecc.hwctl = r852_ecc_hwctl; |
| 871 | chip->ecc.calculate = r852_ecc_calculate; |
| 872 | chip->ecc.correct = r852_ecc_correct; |
| 873 | |
| 874 | /* TODO: hack */ |
| 875 | chip->ecc.read_oob = r852_read_oob; |
| 876 | |
| 877 | /* init our device structure */ |
| 878 | dev = kzalloc(sizeof(struct r852_device), GFP_KERNEL); |
| 879 | |
| 880 | if (!dev) |
| 881 | goto error5; |
| 882 | |
| 883 | chip->priv = dev; |
| 884 | dev->chip = chip; |
| 885 | dev->pci_dev = pci_dev; |
| 886 | pci_set_drvdata(pci_dev, dev); |
| 887 | |
| 888 | dev->bounce_buffer = pci_alloc_consistent(pci_dev, R852_DMA_LEN, |
| 889 | &dev->phys_bounce_buffer); |
| 890 | |
| 891 | if (!dev->bounce_buffer) |
| 892 | goto error6; |
| 893 | |
| 894 | |
| 895 | error = -ENODEV; |
| 896 | dev->mmio = pci_ioremap_bar(pci_dev, 0); |
| 897 | |
| 898 | if (!dev->mmio) |
| 899 | goto error7; |
| 900 | |
| 901 | error = -ENOMEM; |
| 902 | dev->tmp_buffer = kzalloc(SM_SECTOR_SIZE, GFP_KERNEL); |
| 903 | |
| 904 | if (!dev->tmp_buffer) |
| 905 | goto error8; |
| 906 | |
| 907 | init_completion(&dev->dma_done); |
| 908 | |
Tejun Heo | 58a69cb | 2011-02-16 09:25:31 +0100 | [diff] [blame] | 909 | dev->card_workqueue = create_freezable_workqueue(DRV_NAME); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 910 | |
| 911 | if (!dev->card_workqueue) |
| 912 | goto error9; |
| 913 | |
| 914 | INIT_DELAYED_WORK(&dev->card_detect_work, r852_card_detect_work); |
| 915 | |
| 916 | /* shutdown everything - precation */ |
| 917 | r852_engine_disable(dev); |
| 918 | r852_disable_irqs(dev); |
| 919 | |
| 920 | r852_dma_test(dev); |
| 921 | |
Maxim Levitsky | cc1fed0 | 2010-06-02 16:01:45 +0300 | [diff] [blame] | 922 | dev->irq = pci_dev->irq; |
| 923 | spin_lock_init(&dev->irqlock); |
| 924 | |
| 925 | dev->card_detected = 0; |
| 926 | r852_card_update_present(dev); |
| 927 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 928 | /*register irq handler*/ |
| 929 | error = -ENODEV; |
| 930 | if (request_irq(pci_dev->irq, &r852_irq, IRQF_SHARED, |
| 931 | DRV_NAME, dev)) |
| 932 | goto error10; |
| 933 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 934 | /* kick initial present test */ |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 935 | queue_delayed_work(dev->card_workqueue, |
| 936 | &dev->card_detect_work, 0); |
| 937 | |
| 938 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 939 | printk(KERN_NOTICE DRV_NAME ": driver loaded successfully\n"); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 940 | return 0; |
| 941 | |
| 942 | error10: |
| 943 | destroy_workqueue(dev->card_workqueue); |
| 944 | error9: |
| 945 | kfree(dev->tmp_buffer); |
| 946 | error8: |
| 947 | pci_iounmap(pci_dev, dev->mmio); |
| 948 | error7: |
| 949 | pci_free_consistent(pci_dev, R852_DMA_LEN, |
| 950 | dev->bounce_buffer, dev->phys_bounce_buffer); |
| 951 | error6: |
| 952 | kfree(dev); |
| 953 | error5: |
| 954 | kfree(chip); |
| 955 | error4: |
| 956 | pci_release_regions(pci_dev); |
| 957 | error3: |
| 958 | error2: |
| 959 | pci_disable_device(pci_dev); |
| 960 | error1: |
| 961 | return error; |
| 962 | } |
| 963 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 964 | static void r852_remove(struct pci_dev *pci_dev) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 965 | { |
| 966 | struct r852_device *dev = pci_get_drvdata(pci_dev); |
| 967 | |
| 968 | /* Stop detect workqueue - |
| 969 | we are going to unregister the device anyway*/ |
| 970 | cancel_delayed_work_sync(&dev->card_detect_work); |
| 971 | destroy_workqueue(dev->card_workqueue); |
| 972 | |
| 973 | /* Unregister the device, this might make more IO */ |
| 974 | r852_unregister_nand_device(dev); |
| 975 | |
| 976 | /* Stop interrupts */ |
| 977 | r852_disable_irqs(dev); |
| 978 | synchronize_irq(dev->irq); |
| 979 | free_irq(dev->irq, dev); |
| 980 | |
| 981 | /* Cleanup */ |
| 982 | kfree(dev->tmp_buffer); |
| 983 | pci_iounmap(pci_dev, dev->mmio); |
| 984 | pci_free_consistent(pci_dev, R852_DMA_LEN, |
| 985 | dev->bounce_buffer, dev->phys_bounce_buffer); |
| 986 | |
| 987 | kfree(dev->chip); |
| 988 | kfree(dev); |
| 989 | |
| 990 | /* Shutdown the PCI device */ |
| 991 | pci_release_regions(pci_dev); |
| 992 | pci_disable_device(pci_dev); |
| 993 | } |
| 994 | |
Jingoo Han | 2fffc79 | 2013-08-07 16:14:38 +0900 | [diff] [blame] | 995 | static void r852_shutdown(struct pci_dev *pci_dev) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 996 | { |
| 997 | struct r852_device *dev = pci_get_drvdata(pci_dev); |
| 998 | |
| 999 | cancel_delayed_work_sync(&dev->card_detect_work); |
| 1000 | r852_disable_irqs(dev); |
| 1001 | synchronize_irq(dev->irq); |
| 1002 | pci_disable_device(pci_dev); |
| 1003 | } |
| 1004 | |
Jingoo Han | b87c92c | 2013-03-26 15:53:04 +0900 | [diff] [blame] | 1005 | #ifdef CONFIG_PM_SLEEP |
Axel Lin | 1bba688 | 2011-09-26 10:13:03 +0800 | [diff] [blame] | 1006 | static int r852_suspend(struct device *device) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1007 | { |
| 1008 | struct r852_device *dev = pci_get_drvdata(to_pci_dev(device)); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1009 | |
| 1010 | if (dev->ctlreg & R852_CTL_CARDENABLE) |
| 1011 | return -EBUSY; |
| 1012 | |
| 1013 | /* First make sure the detect work is gone */ |
| 1014 | cancel_delayed_work_sync(&dev->card_detect_work); |
| 1015 | |
| 1016 | /* Turn off the interrupts and stop the device */ |
| 1017 | r852_disable_irqs(dev); |
| 1018 | r852_engine_disable(dev); |
| 1019 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1020 | /* If card was pulled off just during the suspend, which is very |
| 1021 | unlikely, we will remove it on resume, it too late now |
| 1022 | anyway... */ |
| 1023 | dev->card_unstable = 0; |
Maxim Levitsky | 9bf7071 | 2010-10-15 17:20:46 +0200 | [diff] [blame] | 1024 | return 0; |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1025 | } |
| 1026 | |
Axel Lin | 1bba688 | 2011-09-26 10:13:03 +0800 | [diff] [blame] | 1027 | static int r852_resume(struct device *device) |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1028 | { |
| 1029 | struct r852_device *dev = pci_get_drvdata(to_pci_dev(device)); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1030 | |
| 1031 | r852_disable_irqs(dev); |
| 1032 | r852_card_update_present(dev); |
| 1033 | r852_engine_disable(dev); |
| 1034 | |
| 1035 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1036 | /* If card status changed, just do the work */ |
| 1037 | if (dev->card_detected != dev->card_registred) { |
| 1038 | dbg("card was %s during low power state", |
| 1039 | dev->card_detected ? "added" : "removed"); |
| 1040 | |
| 1041 | queue_delayed_work(dev->card_workqueue, |
Maxim Levitsky | 9489be8 | 2010-06-02 16:01:46 +0300 | [diff] [blame] | 1042 | &dev->card_detect_work, msecs_to_jiffies(1000)); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | /* Otherwise, initialize the card */ |
| 1047 | if (dev->card_registred) { |
| 1048 | r852_engine_enable(dev); |
| 1049 | dev->chip->select_chip(dev->mtd, 0); |
| 1050 | dev->chip->cmdfunc(dev->mtd, NAND_CMD_RESET, -1, -1); |
| 1051 | dev->chip->select_chip(dev->mtd, -1); |
| 1052 | } |
| 1053 | |
| 1054 | /* Program card detection IRQ */ |
| 1055 | r852_update_card_detect(dev); |
| 1056 | return 0; |
| 1057 | } |
Randy Dunlap | b2aaf7a | 2010-03-01 13:54:19 -0800 | [diff] [blame] | 1058 | #endif |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1059 | |
| 1060 | static const struct pci_device_id r852_pci_id_tbl[] = { |
| 1061 | |
Maxim Levitsky | d4080cb | 2010-02-26 23:10:32 +0200 | [diff] [blame] | 1062 | { PCI_VDEVICE(RICOH, 0x0852), }, |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1063 | { }, |
| 1064 | }; |
| 1065 | |
| 1066 | MODULE_DEVICE_TABLE(pci, r852_pci_id_tbl); |
| 1067 | |
Axel Lin | 1bba688 | 2011-09-26 10:13:03 +0800 | [diff] [blame] | 1068 | static SIMPLE_DEV_PM_OPS(r852_pm_ops, r852_suspend, r852_resume); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1069 | |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1070 | static struct pci_driver r852_pci_driver = { |
| 1071 | .name = DRV_NAME, |
| 1072 | .id_table = r852_pci_id_tbl, |
| 1073 | .probe = r852_probe, |
| 1074 | .remove = r852_remove, |
| 1075 | .shutdown = r852_shutdown, |
| 1076 | .driver.pm = &r852_pm_ops, |
| 1077 | }; |
| 1078 | |
Axel Lin | 4d16cd6 | 2012-04-03 09:59:44 +0800 | [diff] [blame] | 1079 | module_pci_driver(r852_pci_driver); |
Maxim Levitsky | 67e054e | 2010-02-22 20:39:42 +0200 | [diff] [blame] | 1080 | |
| 1081 | MODULE_LICENSE("GPL"); |
| 1082 | MODULE_AUTHOR("Maxim Levitsky <maximlevitsky@gmail.com>"); |
| 1083 | MODULE_DESCRIPTION("Ricoh 85xx xD/smartmedia card reader driver"); |