Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Driver for NAND MLC Controller in LPC32xx |
| 3 | * |
| 4 | * Author: Roland Stigge <stigge@antcom.de> |
| 5 | * |
| 6 | * Copyright © 2011 WORK Microwave GmbH |
| 7 | * Copyright © 2011, 2012 Roland Stigge |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * |
| 20 | * NAND Flash Controller Operation: |
| 21 | * - Read: Auto Decode |
| 22 | * - Write: Auto Encode |
| 23 | * - Tested Page Sizes: 2048, 4096 |
| 24 | */ |
| 25 | |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/platform_device.h> |
| 29 | #include <linux/mtd/mtd.h> |
Boris Brezillon | d4092d7 | 2017-08-04 17:29:10 +0200 | [diff] [blame] | 30 | #include <linux/mtd/rawnand.h> |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 31 | #include <linux/mtd/partitions.h> |
| 32 | #include <linux/clk.h> |
| 33 | #include <linux/err.h> |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/completion.h> |
| 36 | #include <linux/interrupt.h> |
| 37 | #include <linux/of.h> |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 38 | #include <linux/of_gpio.h> |
Roland Stigge | 9c6f62a | 2012-08-16 15:15:35 +0200 | [diff] [blame] | 39 | #include <linux/mtd/lpc32xx_mlc.h> |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 40 | #include <linux/io.h> |
| 41 | #include <linux/mm.h> |
| 42 | #include <linux/dma-mapping.h> |
| 43 | #include <linux/dmaengine.h> |
| 44 | #include <linux/mtd/nand_ecc.h> |
| 45 | |
| 46 | #define DRV_NAME "lpc32xx_mlc" |
| 47 | |
| 48 | /********************************************************************** |
| 49 | * MLC NAND controller register offsets |
| 50 | **********************************************************************/ |
| 51 | |
| 52 | #define MLC_BUFF(x) (x + 0x00000) |
| 53 | #define MLC_DATA(x) (x + 0x08000) |
| 54 | #define MLC_CMD(x) (x + 0x10000) |
| 55 | #define MLC_ADDR(x) (x + 0x10004) |
| 56 | #define MLC_ECC_ENC_REG(x) (x + 0x10008) |
| 57 | #define MLC_ECC_DEC_REG(x) (x + 0x1000C) |
| 58 | #define MLC_ECC_AUTO_ENC_REG(x) (x + 0x10010) |
| 59 | #define MLC_ECC_AUTO_DEC_REG(x) (x + 0x10014) |
| 60 | #define MLC_RPR(x) (x + 0x10018) |
| 61 | #define MLC_WPR(x) (x + 0x1001C) |
| 62 | #define MLC_RUBP(x) (x + 0x10020) |
| 63 | #define MLC_ROBP(x) (x + 0x10024) |
| 64 | #define MLC_SW_WP_ADD_LOW(x) (x + 0x10028) |
| 65 | #define MLC_SW_WP_ADD_HIG(x) (x + 0x1002C) |
| 66 | #define MLC_ICR(x) (x + 0x10030) |
| 67 | #define MLC_TIME_REG(x) (x + 0x10034) |
| 68 | #define MLC_IRQ_MR(x) (x + 0x10038) |
| 69 | #define MLC_IRQ_SR(x) (x + 0x1003C) |
| 70 | #define MLC_LOCK_PR(x) (x + 0x10044) |
| 71 | #define MLC_ISR(x) (x + 0x10048) |
| 72 | #define MLC_CEH(x) (x + 0x1004C) |
| 73 | |
| 74 | /********************************************************************** |
| 75 | * MLC_CMD bit definitions |
| 76 | **********************************************************************/ |
| 77 | #define MLCCMD_RESET 0xFF |
| 78 | |
| 79 | /********************************************************************** |
| 80 | * MLC_ICR bit definitions |
| 81 | **********************************************************************/ |
| 82 | #define MLCICR_WPROT (1 << 3) |
| 83 | #define MLCICR_LARGEBLOCK (1 << 2) |
| 84 | #define MLCICR_LONGADDR (1 << 1) |
| 85 | #define MLCICR_16BIT (1 << 0) /* unsupported by LPC32x0! */ |
| 86 | |
| 87 | /********************************************************************** |
| 88 | * MLC_TIME_REG bit definitions |
| 89 | **********************************************************************/ |
| 90 | #define MLCTIMEREG_TCEA_DELAY(n) (((n) & 0x03) << 24) |
| 91 | #define MLCTIMEREG_BUSY_DELAY(n) (((n) & 0x1F) << 19) |
| 92 | #define MLCTIMEREG_NAND_TA(n) (((n) & 0x07) << 16) |
| 93 | #define MLCTIMEREG_RD_HIGH(n) (((n) & 0x0F) << 12) |
| 94 | #define MLCTIMEREG_RD_LOW(n) (((n) & 0x0F) << 8) |
| 95 | #define MLCTIMEREG_WR_HIGH(n) (((n) & 0x0F) << 4) |
| 96 | #define MLCTIMEREG_WR_LOW(n) (((n) & 0x0F) << 0) |
| 97 | |
| 98 | /********************************************************************** |
| 99 | * MLC_IRQ_MR and MLC_IRQ_SR bit definitions |
| 100 | **********************************************************************/ |
| 101 | #define MLCIRQ_NAND_READY (1 << 5) |
| 102 | #define MLCIRQ_CONTROLLER_READY (1 << 4) |
| 103 | #define MLCIRQ_DECODE_FAILURE (1 << 3) |
| 104 | #define MLCIRQ_DECODE_ERROR (1 << 2) |
| 105 | #define MLCIRQ_ECC_READY (1 << 1) |
| 106 | #define MLCIRQ_WRPROT_FAULT (1 << 0) |
| 107 | |
| 108 | /********************************************************************** |
| 109 | * MLC_LOCK_PR bit definitions |
| 110 | **********************************************************************/ |
| 111 | #define MLCLOCKPR_MAGIC 0xA25E |
| 112 | |
| 113 | /********************************************************************** |
| 114 | * MLC_ISR bit definitions |
| 115 | **********************************************************************/ |
| 116 | #define MLCISR_DECODER_FAILURE (1 << 6) |
| 117 | #define MLCISR_ERRORS ((1 << 4) | (1 << 5)) |
| 118 | #define MLCISR_ERRORS_DETECTED (1 << 3) |
| 119 | #define MLCISR_ECC_READY (1 << 2) |
| 120 | #define MLCISR_CONTROLLER_READY (1 << 1) |
| 121 | #define MLCISR_NAND_READY (1 << 0) |
| 122 | |
| 123 | /********************************************************************** |
| 124 | * MLC_CEH bit definitions |
| 125 | **********************************************************************/ |
| 126 | #define MLCCEH_NORMAL (1 << 0) |
| 127 | |
| 128 | struct lpc32xx_nand_cfg_mlc { |
| 129 | uint32_t tcea_delay; |
| 130 | uint32_t busy_delay; |
| 131 | uint32_t nand_ta; |
| 132 | uint32_t rd_high; |
| 133 | uint32_t rd_low; |
| 134 | uint32_t wr_high; |
| 135 | uint32_t wr_low; |
| 136 | int wp_gpio; |
| 137 | struct mtd_partition *parts; |
| 138 | unsigned num_parts; |
| 139 | }; |
| 140 | |
Boris Brezillon | d50b523 | 2016-02-03 20:02:41 +0100 | [diff] [blame] | 141 | static int lpc32xx_ooblayout_ecc(struct mtd_info *mtd, int section, |
| 142 | struct mtd_oob_region *oobregion) |
| 143 | { |
| 144 | struct nand_chip *nand_chip = mtd_to_nand(mtd); |
| 145 | |
| 146 | if (section >= nand_chip->ecc.steps) |
| 147 | return -ERANGE; |
| 148 | |
| 149 | oobregion->offset = ((section + 1) * 16) - nand_chip->ecc.bytes; |
| 150 | oobregion->length = nand_chip->ecc.bytes; |
| 151 | |
| 152 | return 0; |
| 153 | } |
| 154 | |
| 155 | static int lpc32xx_ooblayout_free(struct mtd_info *mtd, int section, |
| 156 | struct mtd_oob_region *oobregion) |
| 157 | { |
| 158 | struct nand_chip *nand_chip = mtd_to_nand(mtd); |
| 159 | |
| 160 | if (section >= nand_chip->ecc.steps) |
| 161 | return -ERANGE; |
| 162 | |
| 163 | oobregion->offset = 16 * section; |
| 164 | oobregion->length = 16 - nand_chip->ecc.bytes; |
| 165 | |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | static const struct mtd_ooblayout_ops lpc32xx_ooblayout_ops = { |
| 170 | .ecc = lpc32xx_ooblayout_ecc, |
| 171 | .free = lpc32xx_ooblayout_free, |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 172 | }; |
| 173 | |
| 174 | static struct nand_bbt_descr lpc32xx_nand_bbt = { |
| 175 | .options = NAND_BBT_ABSPAGE | NAND_BBT_2BIT | NAND_BBT_NO_OOB | |
| 176 | NAND_BBT_WRITE, |
| 177 | .pages = { 524224, 0, 0, 0, 0, 0, 0, 0 }, |
| 178 | }; |
| 179 | |
| 180 | static struct nand_bbt_descr lpc32xx_nand_bbt_mirror = { |
| 181 | .options = NAND_BBT_ABSPAGE | NAND_BBT_2BIT | NAND_BBT_NO_OOB | |
| 182 | NAND_BBT_WRITE, |
| 183 | .pages = { 524160, 0, 0, 0, 0, 0, 0, 0 }, |
| 184 | }; |
| 185 | |
| 186 | struct lpc32xx_nand_host { |
| 187 | struct nand_chip nand_chip; |
Roland Stigge | 9c6f62a | 2012-08-16 15:15:35 +0200 | [diff] [blame] | 188 | struct lpc32xx_mlc_platform_data *pdata; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 189 | struct clk *clk; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 190 | void __iomem *io_base; |
| 191 | int irq; |
| 192 | struct lpc32xx_nand_cfg_mlc *ncfg; |
| 193 | struct completion comp_nand; |
| 194 | struct completion comp_controller; |
| 195 | uint32_t llptr; |
| 196 | /* |
| 197 | * Physical addresses of ECC buffer, DMA data buffers, OOB data buffer |
| 198 | */ |
| 199 | dma_addr_t oob_buf_phy; |
| 200 | /* |
| 201 | * Virtual addresses of ECC buffer, DMA data buffers, OOB data buffer |
| 202 | */ |
| 203 | uint8_t *oob_buf; |
| 204 | /* Physical address of DMA base address */ |
| 205 | dma_addr_t io_base_phy; |
| 206 | |
| 207 | struct completion comp_dma; |
| 208 | struct dma_chan *dma_chan; |
| 209 | struct dma_slave_config dma_slave_config; |
| 210 | struct scatterlist sgl; |
| 211 | uint8_t *dma_buf; |
| 212 | uint8_t *dummy_buf; |
| 213 | int mlcsubpages; /* number of 512bytes-subpages */ |
| 214 | }; |
| 215 | |
| 216 | /* |
| 217 | * Activate/Deactivate DMA Operation: |
| 218 | * |
| 219 | * Using the PL080 DMA Controller for transferring the 512 byte subpages |
| 220 | * instead of doing readl() / writel() in a loop slows it down significantly. |
| 221 | * Measurements via getnstimeofday() upon 512 byte subpage reads reveal: |
| 222 | * |
| 223 | * - readl() of 128 x 32 bits in a loop: ~20us |
| 224 | * - DMA read of 512 bytes (32 bit, 4...128 words bursts): ~60us |
| 225 | * - DMA read of 512 bytes (32 bit, no bursts): ~100us |
| 226 | * |
| 227 | * This applies to the transfer itself. In the DMA case: only the |
| 228 | * wait_for_completion() (DMA setup _not_ included). |
| 229 | * |
| 230 | * Note that the 512 bytes subpage transfer is done directly from/to a |
| 231 | * FIFO/buffer inside the NAND controller. Most of the time (~400-800us for a |
| 232 | * 2048 bytes page) is spent waiting for the NAND IRQ, anyway. (The NAND |
| 233 | * controller transferring data between its internal buffer to/from the NAND |
| 234 | * chip.) |
| 235 | * |
| 236 | * Therefore, using the PL080 DMA is disabled by default, for now. |
| 237 | * |
| 238 | */ |
| 239 | static int use_dma; |
| 240 | |
| 241 | static void lpc32xx_nand_setup(struct lpc32xx_nand_host *host) |
| 242 | { |
| 243 | uint32_t clkrate, tmp; |
| 244 | |
| 245 | /* Reset MLC controller */ |
| 246 | writel(MLCCMD_RESET, MLC_CMD(host->io_base)); |
| 247 | udelay(1000); |
| 248 | |
| 249 | /* Get base clock for MLC block */ |
| 250 | clkrate = clk_get_rate(host->clk); |
| 251 | if (clkrate == 0) |
| 252 | clkrate = 104000000; |
| 253 | |
| 254 | /* Unlock MLC_ICR |
| 255 | * (among others, will be locked again automatically) */ |
| 256 | writew(MLCLOCKPR_MAGIC, MLC_LOCK_PR(host->io_base)); |
| 257 | |
| 258 | /* Configure MLC Controller: Large Block, 5 Byte Address */ |
| 259 | tmp = MLCICR_LARGEBLOCK | MLCICR_LONGADDR; |
| 260 | writel(tmp, MLC_ICR(host->io_base)); |
| 261 | |
| 262 | /* Unlock MLC_TIME_REG |
| 263 | * (among others, will be locked again automatically) */ |
| 264 | writew(MLCLOCKPR_MAGIC, MLC_LOCK_PR(host->io_base)); |
| 265 | |
| 266 | /* Compute clock setup values, see LPC and NAND manual */ |
| 267 | tmp = 0; |
| 268 | tmp |= MLCTIMEREG_TCEA_DELAY(clkrate / host->ncfg->tcea_delay + 1); |
| 269 | tmp |= MLCTIMEREG_BUSY_DELAY(clkrate / host->ncfg->busy_delay + 1); |
| 270 | tmp |= MLCTIMEREG_NAND_TA(clkrate / host->ncfg->nand_ta + 1); |
| 271 | tmp |= MLCTIMEREG_RD_HIGH(clkrate / host->ncfg->rd_high + 1); |
| 272 | tmp |= MLCTIMEREG_RD_LOW(clkrate / host->ncfg->rd_low); |
| 273 | tmp |= MLCTIMEREG_WR_HIGH(clkrate / host->ncfg->wr_high + 1); |
| 274 | tmp |= MLCTIMEREG_WR_LOW(clkrate / host->ncfg->wr_low); |
| 275 | writel(tmp, MLC_TIME_REG(host->io_base)); |
| 276 | |
| 277 | /* Enable IRQ for CONTROLLER_READY and NAND_READY */ |
| 278 | writeb(MLCIRQ_CONTROLLER_READY | MLCIRQ_NAND_READY, |
| 279 | MLC_IRQ_MR(host->io_base)); |
| 280 | |
| 281 | /* Normal nCE operation: nCE controlled by controller */ |
| 282 | writel(MLCCEH_NORMAL, MLC_CEH(host->io_base)); |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * Hardware specific access to control lines |
| 287 | */ |
| 288 | static void lpc32xx_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, |
| 289 | unsigned int ctrl) |
| 290 | { |
Boris BREZILLON | 4bd4ebc | 2015-12-01 12:03:04 +0100 | [diff] [blame] | 291 | struct nand_chip *nand_chip = mtd_to_nand(mtd); |
Boris BREZILLON | d699ed2 | 2015-12-10 09:00:41 +0100 | [diff] [blame] | 292 | struct lpc32xx_nand_host *host = nand_get_controller_data(nand_chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 293 | |
| 294 | if (cmd != NAND_CMD_NONE) { |
| 295 | if (ctrl & NAND_CLE) |
| 296 | writel(cmd, MLC_CMD(host->io_base)); |
| 297 | else |
| 298 | writel(cmd, MLC_ADDR(host->io_base)); |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | /* |
| 303 | * Read Device Ready (NAND device _and_ controller ready) |
| 304 | */ |
| 305 | static int lpc32xx_nand_device_ready(struct mtd_info *mtd) |
| 306 | { |
Boris BREZILLON | 4bd4ebc | 2015-12-01 12:03:04 +0100 | [diff] [blame] | 307 | struct nand_chip *nand_chip = mtd_to_nand(mtd); |
Boris BREZILLON | d699ed2 | 2015-12-10 09:00:41 +0100 | [diff] [blame] | 308 | struct lpc32xx_nand_host *host = nand_get_controller_data(nand_chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 309 | |
| 310 | if ((readb(MLC_ISR(host->io_base)) & |
| 311 | (MLCISR_CONTROLLER_READY | MLCISR_NAND_READY)) == |
| 312 | (MLCISR_CONTROLLER_READY | MLCISR_NAND_READY)) |
| 313 | return 1; |
| 314 | |
| 315 | return 0; |
| 316 | } |
| 317 | |
| 318 | static irqreturn_t lpc3xxx_nand_irq(int irq, struct lpc32xx_nand_host *host) |
| 319 | { |
| 320 | uint8_t sr; |
| 321 | |
| 322 | /* Clear interrupt flag by reading status */ |
| 323 | sr = readb(MLC_IRQ_SR(host->io_base)); |
| 324 | if (sr & MLCIRQ_NAND_READY) |
| 325 | complete(&host->comp_nand); |
| 326 | if (sr & MLCIRQ_CONTROLLER_READY) |
| 327 | complete(&host->comp_controller); |
| 328 | |
| 329 | return IRQ_HANDLED; |
| 330 | } |
| 331 | |
| 332 | static int lpc32xx_waitfunc_nand(struct mtd_info *mtd, struct nand_chip *chip) |
| 333 | { |
Boris BREZILLON | d699ed2 | 2015-12-10 09:00:41 +0100 | [diff] [blame] | 334 | struct lpc32xx_nand_host *host = nand_get_controller_data(chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 335 | |
| 336 | if (readb(MLC_ISR(host->io_base)) & MLCISR_NAND_READY) |
| 337 | goto exit; |
| 338 | |
| 339 | wait_for_completion(&host->comp_nand); |
| 340 | |
| 341 | while (!(readb(MLC_ISR(host->io_base)) & MLCISR_NAND_READY)) { |
| 342 | /* Seems to be delayed sometimes by controller */ |
| 343 | dev_dbg(&mtd->dev, "Warning: NAND not ready.\n"); |
| 344 | cpu_relax(); |
| 345 | } |
| 346 | |
| 347 | exit: |
| 348 | return NAND_STATUS_READY; |
| 349 | } |
| 350 | |
| 351 | static int lpc32xx_waitfunc_controller(struct mtd_info *mtd, |
| 352 | struct nand_chip *chip) |
| 353 | { |
Boris BREZILLON | d699ed2 | 2015-12-10 09:00:41 +0100 | [diff] [blame] | 354 | struct lpc32xx_nand_host *host = nand_get_controller_data(chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 355 | |
| 356 | if (readb(MLC_ISR(host->io_base)) & MLCISR_CONTROLLER_READY) |
| 357 | goto exit; |
| 358 | |
| 359 | wait_for_completion(&host->comp_controller); |
| 360 | |
| 361 | while (!(readb(MLC_ISR(host->io_base)) & |
| 362 | MLCISR_CONTROLLER_READY)) { |
| 363 | dev_dbg(&mtd->dev, "Warning: Controller not ready.\n"); |
| 364 | cpu_relax(); |
| 365 | } |
| 366 | |
| 367 | exit: |
| 368 | return NAND_STATUS_READY; |
| 369 | } |
| 370 | |
| 371 | static int lpc32xx_waitfunc(struct mtd_info *mtd, struct nand_chip *chip) |
| 372 | { |
| 373 | lpc32xx_waitfunc_nand(mtd, chip); |
| 374 | lpc32xx_waitfunc_controller(mtd, chip); |
| 375 | |
| 376 | return NAND_STATUS_READY; |
| 377 | } |
| 378 | |
| 379 | /* |
| 380 | * Enable NAND write protect |
| 381 | */ |
| 382 | static void lpc32xx_wp_enable(struct lpc32xx_nand_host *host) |
| 383 | { |
| 384 | if (gpio_is_valid(host->ncfg->wp_gpio)) |
| 385 | gpio_set_value(host->ncfg->wp_gpio, 0); |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | * Disable NAND write protect |
| 390 | */ |
| 391 | static void lpc32xx_wp_disable(struct lpc32xx_nand_host *host) |
| 392 | { |
| 393 | if (gpio_is_valid(host->ncfg->wp_gpio)) |
| 394 | gpio_set_value(host->ncfg->wp_gpio, 1); |
| 395 | } |
| 396 | |
| 397 | static void lpc32xx_dma_complete_func(void *completion) |
| 398 | { |
| 399 | complete(completion); |
| 400 | } |
| 401 | |
| 402 | static int lpc32xx_xmit_dma(struct mtd_info *mtd, void *mem, int len, |
| 403 | enum dma_transfer_direction dir) |
| 404 | { |
Boris BREZILLON | 4bd4ebc | 2015-12-01 12:03:04 +0100 | [diff] [blame] | 405 | struct nand_chip *chip = mtd_to_nand(mtd); |
Boris BREZILLON | d699ed2 | 2015-12-10 09:00:41 +0100 | [diff] [blame] | 406 | struct lpc32xx_nand_host *host = nand_get_controller_data(chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 407 | struct dma_async_tx_descriptor *desc; |
| 408 | int flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT; |
| 409 | int res; |
| 410 | |
| 411 | sg_init_one(&host->sgl, mem, len); |
| 412 | |
| 413 | res = dma_map_sg(host->dma_chan->device->dev, &host->sgl, 1, |
| 414 | DMA_BIDIRECTIONAL); |
| 415 | if (res != 1) { |
| 416 | dev_err(mtd->dev.parent, "Failed to map sg list\n"); |
| 417 | return -ENXIO; |
| 418 | } |
| 419 | desc = dmaengine_prep_slave_sg(host->dma_chan, &host->sgl, 1, dir, |
| 420 | flags); |
| 421 | if (!desc) { |
| 422 | dev_err(mtd->dev.parent, "Failed to prepare slave sg\n"); |
| 423 | goto out1; |
| 424 | } |
| 425 | |
| 426 | init_completion(&host->comp_dma); |
| 427 | desc->callback = lpc32xx_dma_complete_func; |
| 428 | desc->callback_param = &host->comp_dma; |
| 429 | |
| 430 | dmaengine_submit(desc); |
| 431 | dma_async_issue_pending(host->dma_chan); |
| 432 | |
| 433 | wait_for_completion_timeout(&host->comp_dma, msecs_to_jiffies(1000)); |
| 434 | |
| 435 | dma_unmap_sg(host->dma_chan->device->dev, &host->sgl, 1, |
| 436 | DMA_BIDIRECTIONAL); |
| 437 | return 0; |
| 438 | out1: |
| 439 | dma_unmap_sg(host->dma_chan->device->dev, &host->sgl, 1, |
| 440 | DMA_BIDIRECTIONAL); |
| 441 | return -ENXIO; |
| 442 | } |
| 443 | |
| 444 | static int lpc32xx_read_page(struct mtd_info *mtd, struct nand_chip *chip, |
| 445 | uint8_t *buf, int oob_required, int page) |
| 446 | { |
Boris BREZILLON | d699ed2 | 2015-12-10 09:00:41 +0100 | [diff] [blame] | 447 | struct lpc32xx_nand_host *host = nand_get_controller_data(chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 448 | int i, j; |
| 449 | uint8_t *oobbuf = chip->oob_poi; |
| 450 | uint32_t mlc_isr; |
| 451 | int res; |
| 452 | uint8_t *dma_buf; |
| 453 | bool dma_mapped; |
| 454 | |
| 455 | if ((void *)buf <= high_memory) { |
| 456 | dma_buf = buf; |
| 457 | dma_mapped = true; |
| 458 | } else { |
| 459 | dma_buf = host->dma_buf; |
| 460 | dma_mapped = false; |
| 461 | } |
| 462 | |
| 463 | /* Writing Command and Address */ |
Boris Brezillon | 97d90da | 2017-11-30 18:01:29 +0100 | [diff] [blame^] | 464 | nand_read_page_op(chip, page, 0, NULL, 0); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 465 | |
| 466 | /* For all sub-pages */ |
| 467 | for (i = 0; i < host->mlcsubpages; i++) { |
| 468 | /* Start Auto Decode Command */ |
| 469 | writeb(0x00, MLC_ECC_AUTO_DEC_REG(host->io_base)); |
| 470 | |
| 471 | /* Wait for Controller Ready */ |
| 472 | lpc32xx_waitfunc_controller(mtd, chip); |
| 473 | |
| 474 | /* Check ECC Error status */ |
| 475 | mlc_isr = readl(MLC_ISR(host->io_base)); |
| 476 | if (mlc_isr & MLCISR_DECODER_FAILURE) { |
| 477 | mtd->ecc_stats.failed++; |
| 478 | dev_warn(&mtd->dev, "%s: DECODER_FAILURE\n", __func__); |
| 479 | } else if (mlc_isr & MLCISR_ERRORS_DETECTED) { |
| 480 | mtd->ecc_stats.corrected += ((mlc_isr >> 4) & 0x3) + 1; |
| 481 | } |
| 482 | |
| 483 | /* Read 512 + 16 Bytes */ |
| 484 | if (use_dma) { |
| 485 | res = lpc32xx_xmit_dma(mtd, dma_buf + i * 512, 512, |
| 486 | DMA_DEV_TO_MEM); |
| 487 | if (res) |
| 488 | return res; |
| 489 | } else { |
| 490 | for (j = 0; j < (512 >> 2); j++) { |
| 491 | *((uint32_t *)(buf)) = |
| 492 | readl(MLC_BUFF(host->io_base)); |
| 493 | buf += 4; |
| 494 | } |
| 495 | } |
| 496 | for (j = 0; j < (16 >> 2); j++) { |
| 497 | *((uint32_t *)(oobbuf)) = |
| 498 | readl(MLC_BUFF(host->io_base)); |
| 499 | oobbuf += 4; |
| 500 | } |
| 501 | } |
| 502 | |
| 503 | if (use_dma && !dma_mapped) |
| 504 | memcpy(buf, dma_buf, mtd->writesize); |
| 505 | |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static int lpc32xx_write_page_lowlevel(struct mtd_info *mtd, |
| 510 | struct nand_chip *chip, |
Boris BREZILLON | 45aaeff | 2015-10-13 11:22:18 +0200 | [diff] [blame] | 511 | const uint8_t *buf, int oob_required, |
| 512 | int page) |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 513 | { |
Boris BREZILLON | d699ed2 | 2015-12-10 09:00:41 +0100 | [diff] [blame] | 514 | struct lpc32xx_nand_host *host = nand_get_controller_data(chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 515 | const uint8_t *oobbuf = chip->oob_poi; |
| 516 | uint8_t *dma_buf = (uint8_t *)buf; |
| 517 | int res; |
| 518 | int i, j; |
| 519 | |
| 520 | if (use_dma && (void *)buf >= high_memory) { |
| 521 | dma_buf = host->dma_buf; |
| 522 | memcpy(dma_buf, buf, mtd->writesize); |
| 523 | } |
| 524 | |
| 525 | for (i = 0; i < host->mlcsubpages; i++) { |
| 526 | /* Start Encode */ |
| 527 | writeb(0x00, MLC_ECC_ENC_REG(host->io_base)); |
| 528 | |
| 529 | /* Write 512 + 6 Bytes to Buffer */ |
| 530 | if (use_dma) { |
| 531 | res = lpc32xx_xmit_dma(mtd, dma_buf + i * 512, 512, |
| 532 | DMA_MEM_TO_DEV); |
| 533 | if (res) |
| 534 | return res; |
| 535 | } else { |
| 536 | for (j = 0; j < (512 >> 2); j++) { |
| 537 | writel(*((uint32_t *)(buf)), |
| 538 | MLC_BUFF(host->io_base)); |
| 539 | buf += 4; |
| 540 | } |
| 541 | } |
| 542 | writel(*((uint32_t *)(oobbuf)), MLC_BUFF(host->io_base)); |
| 543 | oobbuf += 4; |
| 544 | writew(*((uint16_t *)(oobbuf)), MLC_BUFF(host->io_base)); |
| 545 | oobbuf += 12; |
| 546 | |
| 547 | /* Auto Encode w/ Bit 8 = 0 (see LPC MLC Controller manual) */ |
| 548 | writeb(0x00, MLC_ECC_AUTO_ENC_REG(host->io_base)); |
| 549 | |
| 550 | /* Wait for Controller Ready */ |
| 551 | lpc32xx_waitfunc_controller(mtd, chip); |
| 552 | } |
| 553 | return 0; |
| 554 | } |
| 555 | |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 556 | static int lpc32xx_read_oob(struct mtd_info *mtd, struct nand_chip *chip, |
| 557 | int page) |
| 558 | { |
Boris BREZILLON | d699ed2 | 2015-12-10 09:00:41 +0100 | [diff] [blame] | 559 | struct lpc32xx_nand_host *host = nand_get_controller_data(chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 560 | |
| 561 | /* Read whole page - necessary with MLC controller! */ |
| 562 | lpc32xx_read_page(mtd, chip, host->dummy_buf, 1, page); |
| 563 | |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | static int lpc32xx_write_oob(struct mtd_info *mtd, struct nand_chip *chip, |
| 568 | int page) |
| 569 | { |
| 570 | /* None, write_oob conflicts with the automatic LPC MLC ECC decoder! */ |
| 571 | return 0; |
| 572 | } |
| 573 | |
| 574 | /* Prepares MLC for transfers with H/W ECC enabled: always enabled anyway */ |
| 575 | static void lpc32xx_ecc_enable(struct mtd_info *mtd, int mode) |
| 576 | { |
| 577 | /* Always enabled! */ |
| 578 | } |
| 579 | |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 580 | static int lpc32xx_dma_setup(struct lpc32xx_nand_host *host) |
| 581 | { |
Boris BREZILLON | 0faf8c3 | 2015-12-10 09:00:10 +0100 | [diff] [blame] | 582 | struct mtd_info *mtd = nand_to_mtd(&host->nand_chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 583 | dma_cap_mask_t mask; |
| 584 | |
Roland Stigge | 9c6f62a | 2012-08-16 15:15:35 +0200 | [diff] [blame] | 585 | if (!host->pdata || !host->pdata->dma_filter) { |
| 586 | dev_err(mtd->dev.parent, "no DMA platform data\n"); |
| 587 | return -ENOENT; |
| 588 | } |
| 589 | |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 590 | dma_cap_zero(mask); |
| 591 | dma_cap_set(DMA_SLAVE, mask); |
Roland Stigge | 9c6f62a | 2012-08-16 15:15:35 +0200 | [diff] [blame] | 592 | host->dma_chan = dma_request_channel(mask, host->pdata->dma_filter, |
| 593 | "nand-mlc"); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 594 | if (!host->dma_chan) { |
| 595 | dev_err(mtd->dev.parent, "Failed to request DMA channel\n"); |
| 596 | return -EBUSY; |
| 597 | } |
| 598 | |
| 599 | /* |
| 600 | * Set direction to a sensible value even if the dmaengine driver |
| 601 | * should ignore it. With the default (DMA_MEM_TO_MEM), the amba-pl08x |
| 602 | * driver criticizes it as "alien transfer direction". |
| 603 | */ |
| 604 | host->dma_slave_config.direction = DMA_DEV_TO_MEM; |
| 605 | host->dma_slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 606 | host->dma_slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 607 | host->dma_slave_config.src_maxburst = 128; |
| 608 | host->dma_slave_config.dst_maxburst = 128; |
| 609 | /* DMA controller does flow control: */ |
| 610 | host->dma_slave_config.device_fc = false; |
| 611 | host->dma_slave_config.src_addr = MLC_BUFF(host->io_base_phy); |
| 612 | host->dma_slave_config.dst_addr = MLC_BUFF(host->io_base_phy); |
| 613 | if (dmaengine_slave_config(host->dma_chan, &host->dma_slave_config)) { |
| 614 | dev_err(mtd->dev.parent, "Failed to setup DMA slave\n"); |
| 615 | goto out1; |
| 616 | } |
| 617 | |
| 618 | return 0; |
| 619 | out1: |
| 620 | dma_release_channel(host->dma_chan); |
| 621 | return -ENXIO; |
| 622 | } |
| 623 | |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 624 | static struct lpc32xx_nand_cfg_mlc *lpc32xx_parse_dt(struct device *dev) |
| 625 | { |
Roland Stigge | 62beee2 | 2012-08-24 15:06:52 +0200 | [diff] [blame] | 626 | struct lpc32xx_nand_cfg_mlc *ncfg; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 627 | struct device_node *np = dev->of_node; |
| 628 | |
Roland Stigge | 62beee2 | 2012-08-24 15:06:52 +0200 | [diff] [blame] | 629 | ncfg = devm_kzalloc(dev, sizeof(*ncfg), GFP_KERNEL); |
Jingoo Han | 3479c9d | 2013-12-26 12:18:24 +0900 | [diff] [blame] | 630 | if (!ncfg) |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 631 | return NULL; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 632 | |
Roland Stigge | 62beee2 | 2012-08-24 15:06:52 +0200 | [diff] [blame] | 633 | of_property_read_u32(np, "nxp,tcea-delay", &ncfg->tcea_delay); |
| 634 | of_property_read_u32(np, "nxp,busy-delay", &ncfg->busy_delay); |
| 635 | of_property_read_u32(np, "nxp,nand-ta", &ncfg->nand_ta); |
| 636 | of_property_read_u32(np, "nxp,rd-high", &ncfg->rd_high); |
| 637 | of_property_read_u32(np, "nxp,rd-low", &ncfg->rd_low); |
| 638 | of_property_read_u32(np, "nxp,wr-high", &ncfg->wr_high); |
| 639 | of_property_read_u32(np, "nxp,wr-low", &ncfg->wr_low); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 640 | |
Roland Stigge | 62beee2 | 2012-08-24 15:06:52 +0200 | [diff] [blame] | 641 | if (!ncfg->tcea_delay || !ncfg->busy_delay || !ncfg->nand_ta || |
| 642 | !ncfg->rd_high || !ncfg->rd_low || !ncfg->wr_high || |
| 643 | !ncfg->wr_low) { |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 644 | dev_err(dev, "chip parameters not specified correctly\n"); |
| 645 | return NULL; |
| 646 | } |
| 647 | |
Roland Stigge | 62beee2 | 2012-08-24 15:06:52 +0200 | [diff] [blame] | 648 | ncfg->wp_gpio = of_get_named_gpio(np, "gpios", 0); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 649 | |
Roland Stigge | 62beee2 | 2012-08-24 15:06:52 +0200 | [diff] [blame] | 650 | return ncfg; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 651 | } |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 652 | |
| 653 | /* |
| 654 | * Probe for NAND controller |
| 655 | */ |
Bill Pemberton | 06f2551 | 2012-11-19 13:23:07 -0500 | [diff] [blame] | 656 | static int lpc32xx_nand_probe(struct platform_device *pdev) |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 657 | { |
| 658 | struct lpc32xx_nand_host *host; |
| 659 | struct mtd_info *mtd; |
| 660 | struct nand_chip *nand_chip; |
| 661 | struct resource *rc; |
| 662 | int res; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 663 | |
| 664 | /* Allocate memory for the device structure (and zero it) */ |
| 665 | host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL); |
Jingoo Han | 3479c9d | 2013-12-26 12:18:24 +0900 | [diff] [blame] | 666 | if (!host) |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 667 | return -ENOMEM; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 668 | |
| 669 | rc = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Thierry Reding | b0de774 | 2013-01-21 11:09:12 +0100 | [diff] [blame] | 670 | host->io_base = devm_ioremap_resource(&pdev->dev, rc); |
| 671 | if (IS_ERR(host->io_base)) |
| 672 | return PTR_ERR(host->io_base); |
| 673 | |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 674 | host->io_base_phy = rc->start; |
| 675 | |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 676 | nand_chip = &host->nand_chip; |
Boris BREZILLON | 0faf8c3 | 2015-12-10 09:00:10 +0100 | [diff] [blame] | 677 | mtd = nand_to_mtd(nand_chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 678 | if (pdev->dev.of_node) |
| 679 | host->ncfg = lpc32xx_parse_dt(&pdev->dev); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 680 | if (!host->ncfg) { |
Roland Stigge | 62beee2 | 2012-08-24 15:06:52 +0200 | [diff] [blame] | 681 | dev_err(&pdev->dev, |
| 682 | "Missing or bad NAND config from device tree\n"); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 683 | return -ENOENT; |
| 684 | } |
| 685 | if (host->ncfg->wp_gpio == -EPROBE_DEFER) |
| 686 | return -EPROBE_DEFER; |
| 687 | if (gpio_is_valid(host->ncfg->wp_gpio) && |
| 688 | gpio_request(host->ncfg->wp_gpio, "NAND WP")) { |
| 689 | dev_err(&pdev->dev, "GPIO not available\n"); |
| 690 | return -EBUSY; |
| 691 | } |
| 692 | lpc32xx_wp_disable(host); |
| 693 | |
Jingoo Han | 453810b | 2013-07-30 17:18:33 +0900 | [diff] [blame] | 694 | host->pdata = dev_get_platdata(&pdev->dev); |
Roland Stigge | 9c6f62a | 2012-08-16 15:15:35 +0200 | [diff] [blame] | 695 | |
Boris BREZILLON | d699ed2 | 2015-12-10 09:00:41 +0100 | [diff] [blame] | 696 | /* link the private data structures */ |
| 697 | nand_set_controller_data(nand_chip, host); |
Brian Norris | a61ae81 | 2015-10-30 20:33:25 -0700 | [diff] [blame] | 698 | nand_set_flash_node(nand_chip, pdev->dev.of_node); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 699 | mtd->dev.parent = &pdev->dev; |
| 700 | |
| 701 | /* Get NAND clock */ |
| 702 | host->clk = clk_get(&pdev->dev, NULL); |
| 703 | if (IS_ERR(host->clk)) { |
| 704 | dev_err(&pdev->dev, "Clock initialization failure\n"); |
| 705 | res = -ENOENT; |
| 706 | goto err_exit1; |
| 707 | } |
Arvind Yadav | 4d26f01 | 2017-08-01 17:10:11 +0530 | [diff] [blame] | 708 | res = clk_prepare_enable(host->clk); |
| 709 | if (res) |
Christophe JAILLET | 17b694a | 2017-09-03 13:58:31 +0200 | [diff] [blame] | 710 | goto err_put_clk; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 711 | |
| 712 | nand_chip->cmd_ctrl = lpc32xx_nand_cmd_ctrl; |
| 713 | nand_chip->dev_ready = lpc32xx_nand_device_ready; |
| 714 | nand_chip->chip_delay = 25; /* us */ |
| 715 | nand_chip->IO_ADDR_R = MLC_DATA(host->io_base); |
| 716 | nand_chip->IO_ADDR_W = MLC_DATA(host->io_base); |
| 717 | |
| 718 | /* Init NAND controller */ |
| 719 | lpc32xx_nand_setup(host); |
| 720 | |
| 721 | platform_set_drvdata(pdev, host); |
| 722 | |
| 723 | /* Initialize function pointers */ |
| 724 | nand_chip->ecc.hwctl = lpc32xx_ecc_enable; |
| 725 | nand_chip->ecc.read_page_raw = lpc32xx_read_page; |
| 726 | nand_chip->ecc.read_page = lpc32xx_read_page; |
| 727 | nand_chip->ecc.write_page_raw = lpc32xx_write_page_lowlevel; |
| 728 | nand_chip->ecc.write_page = lpc32xx_write_page_lowlevel; |
| 729 | nand_chip->ecc.write_oob = lpc32xx_write_oob; |
| 730 | nand_chip->ecc.read_oob = lpc32xx_read_oob; |
| 731 | nand_chip->ecc.strength = 4; |
Boris Brezillon | d50b523 | 2016-02-03 20:02:41 +0100 | [diff] [blame] | 732 | nand_chip->ecc.bytes = 10; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 733 | nand_chip->waitfunc = lpc32xx_waitfunc; |
| 734 | |
Brian Norris | 5e41d0a | 2013-12-16 20:50:32 -0800 | [diff] [blame] | 735 | nand_chip->options = NAND_NO_SUBPAGE_WRITE; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 736 | nand_chip->bbt_options = NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB; |
| 737 | nand_chip->bbt_td = &lpc32xx_nand_bbt; |
| 738 | nand_chip->bbt_md = &lpc32xx_nand_bbt_mirror; |
| 739 | |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 740 | if (use_dma) { |
| 741 | res = lpc32xx_dma_setup(host); |
| 742 | if (res) { |
| 743 | res = -EIO; |
| 744 | goto err_exit2; |
| 745 | } |
| 746 | } |
| 747 | |
| 748 | /* |
| 749 | * Scan to find existance of the device and |
| 750 | * Get the type of NAND device SMALL block or LARGE block |
| 751 | */ |
Masahiro Yamada | b04bafc | 2016-11-04 19:43:01 +0900 | [diff] [blame] | 752 | res = nand_scan_ident(mtd, 1, NULL); |
| 753 | if (res) |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 754 | goto err_exit3; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 755 | |
| 756 | host->dma_buf = devm_kzalloc(&pdev->dev, mtd->writesize, GFP_KERNEL); |
| 757 | if (!host->dma_buf) { |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 758 | res = -ENOMEM; |
| 759 | goto err_exit3; |
| 760 | } |
| 761 | |
| 762 | host->dummy_buf = devm_kzalloc(&pdev->dev, mtd->writesize, GFP_KERNEL); |
| 763 | if (!host->dummy_buf) { |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 764 | res = -ENOMEM; |
| 765 | goto err_exit3; |
| 766 | } |
| 767 | |
| 768 | nand_chip->ecc.mode = NAND_ECC_HW; |
Boris BREZILLON | f771749 | 2015-12-07 23:26:03 +0100 | [diff] [blame] | 769 | nand_chip->ecc.size = 512; |
Boris Brezillon | d50b523 | 2016-02-03 20:02:41 +0100 | [diff] [blame] | 770 | mtd_set_ooblayout(mtd, &lpc32xx_ooblayout_ops); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 771 | host->mlcsubpages = mtd->writesize / 512; |
| 772 | |
| 773 | /* initially clear interrupt status */ |
| 774 | readb(MLC_IRQ_SR(host->io_base)); |
| 775 | |
| 776 | init_completion(&host->comp_nand); |
| 777 | init_completion(&host->comp_controller); |
| 778 | |
| 779 | host->irq = platform_get_irq(pdev, 0); |
Vladimir Zapolskiy | cf9e167 | 2016-12-05 03:47:10 +0200 | [diff] [blame] | 780 | if (host->irq < 0) { |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 781 | dev_err(&pdev->dev, "failed to get platform irq\n"); |
| 782 | res = -EINVAL; |
| 783 | goto err_exit3; |
| 784 | } |
| 785 | |
| 786 | if (request_irq(host->irq, (irq_handler_t)&lpc3xxx_nand_irq, |
| 787 | IRQF_TRIGGER_HIGH, DRV_NAME, host)) { |
| 788 | dev_err(&pdev->dev, "Error requesting NAND IRQ\n"); |
| 789 | res = -ENXIO; |
| 790 | goto err_exit3; |
| 791 | } |
| 792 | |
| 793 | /* |
| 794 | * Fills out all the uninitialized function pointers with the defaults |
| 795 | * And scans for a bad block table if appropriate. |
| 796 | */ |
Masahiro Yamada | b04bafc | 2016-11-04 19:43:01 +0900 | [diff] [blame] | 797 | res = nand_scan_tail(mtd); |
| 798 | if (res) |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 799 | goto err_exit4; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 800 | |
| 801 | mtd->name = DRV_NAME; |
| 802 | |
Brian Norris | a61ae81 | 2015-10-30 20:33:25 -0700 | [diff] [blame] | 803 | res = mtd_device_register(mtd, host->ncfg->parts, |
| 804 | host->ncfg->num_parts); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 805 | if (!res) |
| 806 | return res; |
| 807 | |
| 808 | nand_release(mtd); |
| 809 | |
| 810 | err_exit4: |
| 811 | free_irq(host->irq, host); |
| 812 | err_exit3: |
| 813 | if (use_dma) |
| 814 | dma_release_channel(host->dma_chan); |
| 815 | err_exit2: |
Vladimir Zapolskiy | 64862db | 2015-10-17 21:09:30 +0300 | [diff] [blame] | 816 | clk_disable_unprepare(host->clk); |
Christophe JAILLET | 17b694a | 2017-09-03 13:58:31 +0200 | [diff] [blame] | 817 | err_put_clk: |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 818 | clk_put(host->clk); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 819 | err_exit1: |
| 820 | lpc32xx_wp_enable(host); |
| 821 | gpio_free(host->ncfg->wp_gpio); |
| 822 | |
| 823 | return res; |
| 824 | } |
| 825 | |
| 826 | /* |
| 827 | * Remove NAND device |
| 828 | */ |
Bill Pemberton | 810b7e0 | 2012-11-19 13:26:04 -0500 | [diff] [blame] | 829 | static int lpc32xx_nand_remove(struct platform_device *pdev) |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 830 | { |
| 831 | struct lpc32xx_nand_host *host = platform_get_drvdata(pdev); |
Boris BREZILLON | 0faf8c3 | 2015-12-10 09:00:10 +0100 | [diff] [blame] | 832 | struct mtd_info *mtd = nand_to_mtd(&host->nand_chip); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 833 | |
| 834 | nand_release(mtd); |
| 835 | free_irq(host->irq, host); |
| 836 | if (use_dma) |
| 837 | dma_release_channel(host->dma_chan); |
| 838 | |
Vladimir Zapolskiy | 64862db | 2015-10-17 21:09:30 +0300 | [diff] [blame] | 839 | clk_disable_unprepare(host->clk); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 840 | clk_put(host->clk); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 841 | |
| 842 | lpc32xx_wp_enable(host); |
| 843 | gpio_free(host->ncfg->wp_gpio); |
| 844 | |
| 845 | return 0; |
| 846 | } |
| 847 | |
| 848 | #ifdef CONFIG_PM |
| 849 | static int lpc32xx_nand_resume(struct platform_device *pdev) |
| 850 | { |
| 851 | struct lpc32xx_nand_host *host = platform_get_drvdata(pdev); |
Arvind Yadav | 4d26f01 | 2017-08-01 17:10:11 +0530 | [diff] [blame] | 852 | int ret; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 853 | |
| 854 | /* Re-enable NAND clock */ |
Arvind Yadav | 4d26f01 | 2017-08-01 17:10:11 +0530 | [diff] [blame] | 855 | ret = clk_prepare_enable(host->clk); |
| 856 | if (ret) |
| 857 | return ret; |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 858 | |
| 859 | /* Fresh init of NAND controller */ |
| 860 | lpc32xx_nand_setup(host); |
| 861 | |
| 862 | /* Disable write protect */ |
| 863 | lpc32xx_wp_disable(host); |
| 864 | |
| 865 | return 0; |
| 866 | } |
| 867 | |
| 868 | static int lpc32xx_nand_suspend(struct platform_device *pdev, pm_message_t pm) |
| 869 | { |
| 870 | struct lpc32xx_nand_host *host = platform_get_drvdata(pdev); |
| 871 | |
| 872 | /* Enable write protect for safety */ |
| 873 | lpc32xx_wp_enable(host); |
| 874 | |
| 875 | /* Disable clock */ |
Vladimir Zapolskiy | 64862db | 2015-10-17 21:09:30 +0300 | [diff] [blame] | 876 | clk_disable_unprepare(host->clk); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 877 | return 0; |
| 878 | } |
| 879 | |
| 880 | #else |
| 881 | #define lpc32xx_nand_resume NULL |
| 882 | #define lpc32xx_nand_suspend NULL |
| 883 | #endif |
| 884 | |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 885 | static const struct of_device_id lpc32xx_nand_match[] = { |
| 886 | { .compatible = "nxp,lpc3220-mlc" }, |
| 887 | { /* sentinel */ }, |
| 888 | }; |
| 889 | MODULE_DEVICE_TABLE(of, lpc32xx_nand_match); |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 890 | |
| 891 | static struct platform_driver lpc32xx_nand_driver = { |
| 892 | .probe = lpc32xx_nand_probe, |
Bill Pemberton | 5153b88 | 2012-11-19 13:21:24 -0500 | [diff] [blame] | 893 | .remove = lpc32xx_nand_remove, |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 894 | .resume = lpc32xx_nand_resume, |
| 895 | .suspend = lpc32xx_nand_suspend, |
| 896 | .driver = { |
| 897 | .name = DRV_NAME, |
Sachin Kamat | 6dcd592 | 2013-09-30 15:10:22 +0530 | [diff] [blame] | 898 | .of_match_table = lpc32xx_nand_match, |
Roland Stigge | 70f7cb7 | 2012-06-30 18:50:38 +0200 | [diff] [blame] | 899 | }, |
| 900 | }; |
| 901 | |
| 902 | module_platform_driver(lpc32xx_nand_driver); |
| 903 | |
| 904 | MODULE_LICENSE("GPL"); |
| 905 | MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>"); |
| 906 | MODULE_DESCRIPTION("NAND driver for the NXP LPC32XX MLC controller"); |