]>
Commit | Line | Data |
---|---|---|
fe69af00 | 1 | /* |
2 | * drivers/mtd/nand/pxa3xx_nand.c | |
3 | * | |
4 | * Copyright © 2005 Intel Corporation | |
5 | * Copyright © 2006 Marvell International Ltd. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
a88bdbb5 | 12 | #include <linux/kernel.h> |
fe69af00 | 13 | #include <linux/module.h> |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/dma-mapping.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/clk.h> | |
19 | #include <linux/mtd/mtd.h> | |
20 | #include <linux/mtd/nand.h> | |
21 | #include <linux/mtd/partitions.h> | |
a1c06ee1 DW |
22 | #include <linux/io.h> |
23 | #include <linux/irq.h> | |
5a0e3ad6 | 24 | #include <linux/slab.h> |
fe69af00 | 25 | |
afb5b5c9 | 26 | #include <mach/dma.h> |
82b95ecb | 27 | #include <plat/pxa3xx_nand.h> |
fe69af00 | 28 | |
29 | #define CHIP_DELAY_TIMEOUT (2 * HZ/10) | |
30 | ||
31 | /* registers and bit definitions */ | |
32 | #define NDCR (0x00) /* Control register */ | |
33 | #define NDTR0CS0 (0x04) /* Timing Parameter 0 for CS0 */ | |
34 | #define NDTR1CS0 (0x0C) /* Timing Parameter 1 for CS0 */ | |
35 | #define NDSR (0x14) /* Status Register */ | |
36 | #define NDPCR (0x18) /* Page Count Register */ | |
37 | #define NDBDR0 (0x1C) /* Bad Block Register 0 */ | |
38 | #define NDBDR1 (0x20) /* Bad Block Register 1 */ | |
39 | #define NDDB (0x40) /* Data Buffer */ | |
40 | #define NDCB0 (0x48) /* Command Buffer0 */ | |
41 | #define NDCB1 (0x4C) /* Command Buffer1 */ | |
42 | #define NDCB2 (0x50) /* Command Buffer2 */ | |
43 | ||
44 | #define NDCR_SPARE_EN (0x1 << 31) | |
45 | #define NDCR_ECC_EN (0x1 << 30) | |
46 | #define NDCR_DMA_EN (0x1 << 29) | |
47 | #define NDCR_ND_RUN (0x1 << 28) | |
48 | #define NDCR_DWIDTH_C (0x1 << 27) | |
49 | #define NDCR_DWIDTH_M (0x1 << 26) | |
50 | #define NDCR_PAGE_SZ (0x1 << 24) | |
51 | #define NDCR_NCSX (0x1 << 23) | |
52 | #define NDCR_ND_MODE (0x3 << 21) | |
53 | #define NDCR_NAND_MODE (0x0) | |
54 | #define NDCR_CLR_PG_CNT (0x1 << 20) | |
55 | #define NDCR_CLR_ECC (0x1 << 19) | |
56 | #define NDCR_RD_ID_CNT_MASK (0x7 << 16) | |
57 | #define NDCR_RD_ID_CNT(x) (((x) << 16) & NDCR_RD_ID_CNT_MASK) | |
58 | ||
59 | #define NDCR_RA_START (0x1 << 15) | |
60 | #define NDCR_PG_PER_BLK (0x1 << 14) | |
61 | #define NDCR_ND_ARB_EN (0x1 << 12) | |
62 | ||
63 | #define NDSR_MASK (0xfff) | |
64 | #define NDSR_RDY (0x1 << 11) | |
65 | #define NDSR_CS0_PAGED (0x1 << 10) | |
66 | #define NDSR_CS1_PAGED (0x1 << 9) | |
67 | #define NDSR_CS0_CMDD (0x1 << 8) | |
68 | #define NDSR_CS1_CMDD (0x1 << 7) | |
69 | #define NDSR_CS0_BBD (0x1 << 6) | |
70 | #define NDSR_CS1_BBD (0x1 << 5) | |
71 | #define NDSR_DBERR (0x1 << 4) | |
72 | #define NDSR_SBERR (0x1 << 3) | |
73 | #define NDSR_WRDREQ (0x1 << 2) | |
74 | #define NDSR_RDDREQ (0x1 << 1) | |
75 | #define NDSR_WRCMDREQ (0x1) | |
76 | ||
77 | #define NDCB0_AUTO_RS (0x1 << 25) | |
78 | #define NDCB0_CSEL (0x1 << 24) | |
79 | #define NDCB0_CMD_TYPE_MASK (0x7 << 21) | |
80 | #define NDCB0_CMD_TYPE(x) (((x) << 21) & NDCB0_CMD_TYPE_MASK) | |
81 | #define NDCB0_NC (0x1 << 20) | |
82 | #define NDCB0_DBC (0x1 << 19) | |
83 | #define NDCB0_ADDR_CYC_MASK (0x7 << 16) | |
84 | #define NDCB0_ADDR_CYC(x) (((x) << 16) & NDCB0_ADDR_CYC_MASK) | |
85 | #define NDCB0_CMD2_MASK (0xff << 8) | |
86 | #define NDCB0_CMD1_MASK (0xff) | |
87 | #define NDCB0_ADDR_CYC_SHIFT (16) | |
88 | ||
fe69af00 | 89 | /* macros for registers read/write */ |
90 | #define nand_writel(info, off, val) \ | |
91 | __raw_writel((val), (info)->mmio_base + (off)) | |
92 | ||
93 | #define nand_readl(info, off) \ | |
94 | __raw_readl((info)->mmio_base + (off)) | |
95 | ||
96 | /* error code and state */ | |
97 | enum { | |
98 | ERR_NONE = 0, | |
99 | ERR_DMABUSERR = -1, | |
100 | ERR_SENDCMD = -2, | |
101 | ERR_DBERR = -3, | |
102 | ERR_BBERR = -4, | |
223cf6c3 | 103 | ERR_SBERR = -5, |
fe69af00 | 104 | }; |
105 | ||
106 | enum { | |
107 | STATE_READY = 0, | |
108 | STATE_CMD_HANDLE, | |
109 | STATE_DMA_READING, | |
110 | STATE_DMA_WRITING, | |
111 | STATE_DMA_DONE, | |
112 | STATE_PIO_READING, | |
113 | STATE_PIO_WRITING, | |
114 | }; | |
115 | ||
fe69af00 | 116 | struct pxa3xx_nand_info { |
117 | struct nand_chip nand_chip; | |
118 | ||
119 | struct platform_device *pdev; | |
18c81b18 | 120 | struct pxa3xx_nand_cmdset *cmdset; |
fe69af00 | 121 | |
122 | struct clk *clk; | |
123 | void __iomem *mmio_base; | |
8638fac8 | 124 | unsigned long mmio_phys; |
fe69af00 | 125 | |
126 | unsigned int buf_start; | |
127 | unsigned int buf_count; | |
128 | ||
129 | /* DMA information */ | |
130 | int drcmr_dat; | |
131 | int drcmr_cmd; | |
132 | ||
133 | unsigned char *data_buff; | |
18c81b18 | 134 | unsigned char *oob_buff; |
fe69af00 | 135 | dma_addr_t data_buff_phys; |
136 | size_t data_buff_size; | |
137 | int data_dma_ch; | |
138 | struct pxa_dma_desc *data_desc; | |
139 | dma_addr_t data_desc_addr; | |
140 | ||
141 | uint32_t reg_ndcr; | |
142 | ||
143 | /* saved column/page_addr during CMD_SEQIN */ | |
144 | int seqin_column; | |
145 | int seqin_page_addr; | |
146 | ||
147 | /* relate to the command */ | |
148 | unsigned int state; | |
149 | ||
150 | int use_ecc; /* use HW ECC ? */ | |
151 | int use_dma; /* use DMA ? */ | |
152 | ||
18c81b18 LW |
153 | unsigned int page_size; /* page size of attached chip */ |
154 | unsigned int data_size; /* data size in FIFO */ | |
fe69af00 | 155 | int retcode; |
156 | struct completion cmd_complete; | |
157 | ||
158 | /* generated NDCBx register values */ | |
159 | uint32_t ndcb0; | |
160 | uint32_t ndcb1; | |
161 | uint32_t ndcb2; | |
c8c17c88 | 162 | |
18c81b18 LW |
163 | /* timing calcuted from setting */ |
164 | uint32_t ndtr0cs0; | |
165 | uint32_t ndtr1cs0; | |
166 | ||
c8c17c88 ES |
167 | /* calculated from pxa3xx_nand_flash data */ |
168 | size_t oob_size; | |
169 | size_t read_id_bytes; | |
170 | ||
171 | unsigned int col_addr_cycles; | |
172 | unsigned int row_addr_cycles; | |
fe69af00 | 173 | }; |
174 | ||
175 | static int use_dma = 1; | |
176 | module_param(use_dma, bool, 0444); | |
177 | MODULE_PARM_DESC(use_dma, "enable DMA for data transfering to/from NAND HW"); | |
178 | ||
f271049e MR |
179 | /* |
180 | * Default NAND flash controller configuration setup by the | |
181 | * bootloader. This configuration is used only when pdata->keep_config is set | |
182 | */ | |
c1f82478 | 183 | static struct pxa3xx_nand_cmdset default_cmdset = { |
fe69af00 | 184 | .read1 = 0x3000, |
185 | .read2 = 0x0050, | |
186 | .program = 0x1080, | |
187 | .read_status = 0x0070, | |
188 | .read_id = 0x0090, | |
189 | .erase = 0xD060, | |
190 | .reset = 0x00FF, | |
191 | .lock = 0x002A, | |
192 | .unlock = 0x2423, | |
193 | .lock_status = 0x007A, | |
194 | }; | |
195 | ||
c1f82478 | 196 | static struct pxa3xx_nand_timing timing[] = { |
227a886c LW |
197 | { 40, 80, 60, 100, 80, 100, 90000, 400, 40, }, |
198 | { 10, 0, 20, 40, 30, 40, 11123, 110, 10, }, | |
199 | { 10, 25, 15, 25, 15, 30, 25000, 60, 10, }, | |
200 | { 10, 35, 15, 25, 15, 25, 25000, 60, 10, }, | |
d3490dfd HZ |
201 | }; |
202 | ||
c1f82478 | 203 | static struct pxa3xx_nand_flash builtin_flash_types[] = { |
227a886c LW |
204 | { 0, 0, 2048, 8, 8, 0, &default_cmdset, &timing[0] }, |
205 | { 0x46ec, 32, 512, 16, 16, 4096, &default_cmdset, &timing[1] }, | |
206 | { 0xdaec, 64, 2048, 8, 8, 2048, &default_cmdset, &timing[1] }, | |
207 | { 0xd7ec, 128, 4096, 8, 8, 8192, &default_cmdset, &timing[1] }, | |
208 | { 0xa12c, 64, 2048, 8, 8, 1024, &default_cmdset, &timing[2] }, | |
209 | { 0xb12c, 64, 2048, 16, 16, 1024, &default_cmdset, &timing[2] }, | |
210 | { 0xdc2c, 64, 2048, 8, 8, 4096, &default_cmdset, &timing[2] }, | |
211 | { 0xcc2c, 64, 2048, 16, 16, 4096, &default_cmdset, &timing[2] }, | |
212 | { 0xba20, 64, 2048, 16, 16, 2048, &default_cmdset, &timing[3] }, | |
d3490dfd HZ |
213 | }; |
214 | ||
227a886c LW |
215 | /* Define a default flash type setting serve as flash detecting only */ |
216 | #define DEFAULT_FLASH_TYPE (&builtin_flash_types[0]) | |
217 | ||
fe69af00 | 218 | #define NDTR0_tCH(c) (min((c), 7) << 19) |
219 | #define NDTR0_tCS(c) (min((c), 7) << 16) | |
220 | #define NDTR0_tWH(c) (min((c), 7) << 11) | |
221 | #define NDTR0_tWP(c) (min((c), 7) << 8) | |
222 | #define NDTR0_tRH(c) (min((c), 7) << 3) | |
223 | #define NDTR0_tRP(c) (min((c), 7) << 0) | |
224 | ||
225 | #define NDTR1_tR(c) (min((c), 65535) << 16) | |
226 | #define NDTR1_tWHR(c) (min((c), 15) << 4) | |
227 | #define NDTR1_tAR(c) (min((c), 15) << 0) | |
228 | ||
229 | /* convert nano-seconds to nand flash controller clock cycles */ | |
93b352fc | 230 | #define ns2cycle(ns, clk) (int)((ns) * (clk / 1000000) / 1000) |
fe69af00 | 231 | |
232 | static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info, | |
7dad482e | 233 | const struct pxa3xx_nand_timing *t) |
fe69af00 | 234 | { |
235 | unsigned long nand_clk = clk_get_rate(info->clk); | |
236 | uint32_t ndtr0, ndtr1; | |
237 | ||
238 | ndtr0 = NDTR0_tCH(ns2cycle(t->tCH, nand_clk)) | | |
239 | NDTR0_tCS(ns2cycle(t->tCS, nand_clk)) | | |
240 | NDTR0_tWH(ns2cycle(t->tWH, nand_clk)) | | |
241 | NDTR0_tWP(ns2cycle(t->tWP, nand_clk)) | | |
242 | NDTR0_tRH(ns2cycle(t->tRH, nand_clk)) | | |
243 | NDTR0_tRP(ns2cycle(t->tRP, nand_clk)); | |
244 | ||
245 | ndtr1 = NDTR1_tR(ns2cycle(t->tR, nand_clk)) | | |
246 | NDTR1_tWHR(ns2cycle(t->tWHR, nand_clk)) | | |
247 | NDTR1_tAR(ns2cycle(t->tAR, nand_clk)); | |
248 | ||
18c81b18 LW |
249 | info->ndtr0cs0 = ndtr0; |
250 | info->ndtr1cs0 = ndtr1; | |
fe69af00 | 251 | nand_writel(info, NDTR0CS0, ndtr0); |
252 | nand_writel(info, NDTR1CS0, ndtr1); | |
253 | } | |
254 | ||
255 | #define WAIT_EVENT_TIMEOUT 10 | |
256 | ||
257 | static int wait_for_event(struct pxa3xx_nand_info *info, uint32_t event) | |
258 | { | |
259 | int timeout = WAIT_EVENT_TIMEOUT; | |
260 | uint32_t ndsr; | |
261 | ||
262 | while (timeout--) { | |
263 | ndsr = nand_readl(info, NDSR) & NDSR_MASK; | |
264 | if (ndsr & event) { | |
265 | nand_writel(info, NDSR, ndsr); | |
266 | return 0; | |
267 | } | |
268 | udelay(10); | |
269 | } | |
270 | ||
271 | return -ETIMEDOUT; | |
272 | } | |
273 | ||
18c81b18 | 274 | static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info) |
fe69af00 | 275 | { |
9d8b1043 LW |
276 | int oob_enable = info->reg_ndcr & NDCR_SPARE_EN; |
277 | ||
278 | info->data_size = info->page_size; | |
279 | if (!oob_enable) { | |
280 | info->oob_size = 0; | |
281 | return; | |
282 | } | |
283 | ||
18c81b18 | 284 | switch (info->page_size) { |
fe69af00 | 285 | case 2048: |
9d8b1043 | 286 | info->oob_size = (info->use_ecc) ? 40 : 64; |
fe69af00 | 287 | break; |
288 | case 512: | |
9d8b1043 | 289 | info->oob_size = (info->use_ecc) ? 8 : 16; |
fe69af00 | 290 | break; |
fe69af00 | 291 | } |
18c81b18 LW |
292 | } |
293 | ||
294 | static int prepare_read_prog_cmd(struct pxa3xx_nand_info *info, | |
295 | uint16_t cmd, int column, int page_addr) | |
296 | { | |
297 | const struct pxa3xx_nand_cmdset *cmdset = info->cmdset; | |
298 | pxa3xx_set_datasize(info); | |
fe69af00 | 299 | |
300 | /* generate values for NDCBx registers */ | |
301 | info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0); | |
302 | info->ndcb1 = 0; | |
303 | info->ndcb2 = 0; | |
c8c17c88 | 304 | info->ndcb0 |= NDCB0_ADDR_CYC(info->row_addr_cycles + info->col_addr_cycles); |
fe69af00 | 305 | |
c8c17c88 | 306 | if (info->col_addr_cycles == 2) { |
fe69af00 | 307 | /* large block, 2 cycles for column address |
308 | * row address starts from 3rd cycle | |
309 | */ | |
7f9938d0 | 310 | info->ndcb1 |= page_addr << 16; |
c8c17c88 | 311 | if (info->row_addr_cycles == 3) |
fe69af00 | 312 | info->ndcb2 = (page_addr >> 16) & 0xff; |
313 | } else | |
314 | /* small block, 1 cycles for column address | |
315 | * row address starts from 2nd cycle | |
316 | */ | |
7f9938d0 | 317 | info->ndcb1 = page_addr << 8; |
fe69af00 | 318 | |
319 | if (cmd == cmdset->program) | |
320 | info->ndcb0 |= NDCB0_CMD_TYPE(1) | NDCB0_AUTO_RS; | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | static int prepare_erase_cmd(struct pxa3xx_nand_info *info, | |
326 | uint16_t cmd, int page_addr) | |
327 | { | |
328 | info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0); | |
329 | info->ndcb0 |= NDCB0_CMD_TYPE(2) | NDCB0_AUTO_RS | NDCB0_ADDR_CYC(3); | |
330 | info->ndcb1 = page_addr; | |
331 | info->ndcb2 = 0; | |
332 | return 0; | |
333 | } | |
334 | ||
335 | static int prepare_other_cmd(struct pxa3xx_nand_info *info, uint16_t cmd) | |
336 | { | |
18c81b18 | 337 | const struct pxa3xx_nand_cmdset *cmdset = info->cmdset; |
fe69af00 | 338 | |
339 | info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0); | |
340 | info->ndcb1 = 0; | |
341 | info->ndcb2 = 0; | |
342 | ||
9d8b1043 | 343 | info->oob_size = 0; |
fe69af00 | 344 | if (cmd == cmdset->read_id) { |
345 | info->ndcb0 |= NDCB0_CMD_TYPE(3); | |
346 | info->data_size = 8; | |
347 | } else if (cmd == cmdset->read_status) { | |
348 | info->ndcb0 |= NDCB0_CMD_TYPE(4); | |
349 | info->data_size = 8; | |
350 | } else if (cmd == cmdset->reset || cmd == cmdset->lock || | |
351 | cmd == cmdset->unlock) { | |
352 | info->ndcb0 |= NDCB0_CMD_TYPE(5); | |
353 | } else | |
354 | return -EINVAL; | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | static void enable_int(struct pxa3xx_nand_info *info, uint32_t int_mask) | |
360 | { | |
361 | uint32_t ndcr; | |
362 | ||
363 | ndcr = nand_readl(info, NDCR); | |
364 | nand_writel(info, NDCR, ndcr & ~int_mask); | |
365 | } | |
366 | ||
367 | static void disable_int(struct pxa3xx_nand_info *info, uint32_t int_mask) | |
368 | { | |
369 | uint32_t ndcr; | |
370 | ||
371 | ndcr = nand_readl(info, NDCR); | |
372 | nand_writel(info, NDCR, ndcr | int_mask); | |
373 | } | |
374 | ||
375 | /* NOTE: it is a must to set ND_RUN firstly, then write command buffer | |
376 | * otherwise, it does not work | |
377 | */ | |
378 | static int write_cmd(struct pxa3xx_nand_info *info) | |
379 | { | |
380 | uint32_t ndcr; | |
381 | ||
382 | /* clear status bits and run */ | |
383 | nand_writel(info, NDSR, NDSR_MASK); | |
384 | ||
385 | ndcr = info->reg_ndcr; | |
386 | ||
387 | ndcr |= info->use_ecc ? NDCR_ECC_EN : 0; | |
388 | ndcr |= info->use_dma ? NDCR_DMA_EN : 0; | |
389 | ndcr |= NDCR_ND_RUN; | |
390 | ||
391 | nand_writel(info, NDCR, ndcr); | |
392 | ||
393 | if (wait_for_event(info, NDSR_WRCMDREQ)) { | |
394 | printk(KERN_ERR "timed out writing command\n"); | |
395 | return -ETIMEDOUT; | |
396 | } | |
397 | ||
398 | nand_writel(info, NDCB0, info->ndcb0); | |
399 | nand_writel(info, NDCB0, info->ndcb1); | |
400 | nand_writel(info, NDCB0, info->ndcb2); | |
401 | return 0; | |
402 | } | |
403 | ||
404 | static int handle_data_pio(struct pxa3xx_nand_info *info) | |
405 | { | |
406 | int ret, timeout = CHIP_DELAY_TIMEOUT; | |
407 | ||
408 | switch (info->state) { | |
409 | case STATE_PIO_WRITING: | |
410 | __raw_writesl(info->mmio_base + NDDB, info->data_buff, | |
a88bdbb5 | 411 | DIV_ROUND_UP(info->data_size, 4)); |
9d8b1043 LW |
412 | if (info->oob_size > 0) |
413 | __raw_writesl(info->mmio_base + NDDB, info->oob_buff, | |
414 | DIV_ROUND_UP(info->oob_size, 4)); | |
fe69af00 | 415 | |
416 | enable_int(info, NDSR_CS0_BBD | NDSR_CS0_CMDD); | |
417 | ||
418 | ret = wait_for_completion_timeout(&info->cmd_complete, timeout); | |
419 | if (!ret) { | |
420 | printk(KERN_ERR "program command time out\n"); | |
421 | return -1; | |
422 | } | |
423 | break; | |
424 | case STATE_PIO_READING: | |
425 | __raw_readsl(info->mmio_base + NDDB, info->data_buff, | |
a88bdbb5 | 426 | DIV_ROUND_UP(info->data_size, 4)); |
9d8b1043 LW |
427 | if (info->oob_size > 0) |
428 | __raw_readsl(info->mmio_base + NDDB, info->oob_buff, | |
429 | DIV_ROUND_UP(info->oob_size, 4)); | |
fe69af00 | 430 | break; |
431 | default: | |
a1c06ee1 | 432 | printk(KERN_ERR "%s: invalid state %d\n", __func__, |
fe69af00 | 433 | info->state); |
434 | return -EINVAL; | |
435 | } | |
436 | ||
437 | info->state = STATE_READY; | |
438 | return 0; | |
439 | } | |
440 | ||
441 | static void start_data_dma(struct pxa3xx_nand_info *info, int dir_out) | |
442 | { | |
443 | struct pxa_dma_desc *desc = info->data_desc; | |
9d8b1043 | 444 | int dma_len = ALIGN(info->data_size + info->oob_size, 32); |
fe69af00 | 445 | |
446 | desc->ddadr = DDADR_STOP; | |
447 | desc->dcmd = DCMD_ENDIRQEN | DCMD_WIDTH4 | DCMD_BURST32 | dma_len; | |
448 | ||
449 | if (dir_out) { | |
450 | desc->dsadr = info->data_buff_phys; | |
8638fac8 | 451 | desc->dtadr = info->mmio_phys + NDDB; |
fe69af00 | 452 | desc->dcmd |= DCMD_INCSRCADDR | DCMD_FLOWTRG; |
453 | } else { | |
454 | desc->dtadr = info->data_buff_phys; | |
8638fac8 | 455 | desc->dsadr = info->mmio_phys + NDDB; |
fe69af00 | 456 | desc->dcmd |= DCMD_INCTRGADDR | DCMD_FLOWSRC; |
457 | } | |
458 | ||
459 | DRCMR(info->drcmr_dat) = DRCMR_MAPVLD | info->data_dma_ch; | |
460 | DDADR(info->data_dma_ch) = info->data_desc_addr; | |
461 | DCSR(info->data_dma_ch) |= DCSR_RUN; | |
462 | } | |
463 | ||
464 | static void pxa3xx_nand_data_dma_irq(int channel, void *data) | |
465 | { | |
466 | struct pxa3xx_nand_info *info = data; | |
467 | uint32_t dcsr; | |
468 | ||
469 | dcsr = DCSR(channel); | |
470 | DCSR(channel) = dcsr; | |
471 | ||
472 | if (dcsr & DCSR_BUSERR) { | |
473 | info->retcode = ERR_DMABUSERR; | |
474 | complete(&info->cmd_complete); | |
475 | } | |
476 | ||
477 | if (info->state == STATE_DMA_WRITING) { | |
478 | info->state = STATE_DMA_DONE; | |
479 | enable_int(info, NDSR_CS0_BBD | NDSR_CS0_CMDD); | |
480 | } else { | |
481 | info->state = STATE_READY; | |
482 | complete(&info->cmd_complete); | |
483 | } | |
484 | } | |
485 | ||
486 | static irqreturn_t pxa3xx_nand_irq(int irq, void *devid) | |
487 | { | |
488 | struct pxa3xx_nand_info *info = devid; | |
489 | unsigned int status; | |
490 | ||
491 | status = nand_readl(info, NDSR); | |
492 | ||
223cf6c3 | 493 | if (status & (NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR)) { |
fe69af00 | 494 | if (status & NDSR_DBERR) |
495 | info->retcode = ERR_DBERR; | |
223cf6c3 YP |
496 | else if (status & NDSR_SBERR) |
497 | info->retcode = ERR_SBERR; | |
fe69af00 | 498 | |
223cf6c3 | 499 | disable_int(info, NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR); |
fe69af00 | 500 | |
501 | if (info->use_dma) { | |
502 | info->state = STATE_DMA_READING; | |
503 | start_data_dma(info, 0); | |
504 | } else { | |
505 | info->state = STATE_PIO_READING; | |
506 | complete(&info->cmd_complete); | |
507 | } | |
508 | } else if (status & NDSR_WRDREQ) { | |
509 | disable_int(info, NDSR_WRDREQ); | |
510 | if (info->use_dma) { | |
511 | info->state = STATE_DMA_WRITING; | |
512 | start_data_dma(info, 1); | |
513 | } else { | |
514 | info->state = STATE_PIO_WRITING; | |
515 | complete(&info->cmd_complete); | |
516 | } | |
517 | } else if (status & (NDSR_CS0_BBD | NDSR_CS0_CMDD)) { | |
518 | if (status & NDSR_CS0_BBD) | |
519 | info->retcode = ERR_BBERR; | |
520 | ||
521 | disable_int(info, NDSR_CS0_BBD | NDSR_CS0_CMDD); | |
522 | info->state = STATE_READY; | |
523 | complete(&info->cmd_complete); | |
524 | } | |
525 | nand_writel(info, NDSR, status); | |
526 | return IRQ_HANDLED; | |
527 | } | |
528 | ||
529 | static int pxa3xx_nand_do_cmd(struct pxa3xx_nand_info *info, uint32_t event) | |
530 | { | |
531 | uint32_t ndcr; | |
532 | int ret, timeout = CHIP_DELAY_TIMEOUT; | |
533 | ||
534 | if (write_cmd(info)) { | |
535 | info->retcode = ERR_SENDCMD; | |
536 | goto fail_stop; | |
537 | } | |
538 | ||
539 | info->state = STATE_CMD_HANDLE; | |
540 | ||
541 | enable_int(info, event); | |
542 | ||
543 | ret = wait_for_completion_timeout(&info->cmd_complete, timeout); | |
544 | if (!ret) { | |
545 | printk(KERN_ERR "command execution timed out\n"); | |
546 | info->retcode = ERR_SENDCMD; | |
547 | goto fail_stop; | |
548 | } | |
549 | ||
550 | if (info->use_dma == 0 && info->data_size > 0) | |
551 | if (handle_data_pio(info)) | |
552 | goto fail_stop; | |
553 | ||
554 | return 0; | |
555 | ||
556 | fail_stop: | |
557 | ndcr = nand_readl(info, NDCR); | |
558 | nand_writel(info, NDCR, ndcr & ~NDCR_ND_RUN); | |
559 | udelay(10); | |
560 | return -ETIMEDOUT; | |
561 | } | |
562 | ||
563 | static int pxa3xx_nand_dev_ready(struct mtd_info *mtd) | |
564 | { | |
565 | struct pxa3xx_nand_info *info = mtd->priv; | |
566 | return (nand_readl(info, NDSR) & NDSR_RDY) ? 1 : 0; | |
567 | } | |
568 | ||
569 | static inline int is_buf_blank(uint8_t *buf, size_t len) | |
570 | { | |
571 | for (; len > 0; len--) | |
572 | if (*buf++ != 0xff) | |
573 | return 0; | |
574 | return 1; | |
575 | } | |
576 | ||
577 | static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command, | |
a1c06ee1 | 578 | int column, int page_addr) |
fe69af00 | 579 | { |
580 | struct pxa3xx_nand_info *info = mtd->priv; | |
18c81b18 | 581 | const struct pxa3xx_nand_cmdset *cmdset = info->cmdset; |
fe69af00 | 582 | int ret; |
583 | ||
584 | info->use_dma = (use_dma) ? 1 : 0; | |
585 | info->use_ecc = 0; | |
586 | info->data_size = 0; | |
587 | info->state = STATE_READY; | |
588 | ||
589 | init_completion(&info->cmd_complete); | |
590 | ||
591 | switch (command) { | |
592 | case NAND_CMD_READOOB: | |
593 | /* disable HW ECC to get all the OOB data */ | |
594 | info->buf_count = mtd->writesize + mtd->oobsize; | |
595 | info->buf_start = mtd->writesize + column; | |
7ce33aff | 596 | memset(info->data_buff, 0xFF, info->buf_count); |
fe69af00 | 597 | |
598 | if (prepare_read_prog_cmd(info, cmdset->read1, column, page_addr)) | |
599 | break; | |
600 | ||
223cf6c3 | 601 | pxa3xx_nand_do_cmd(info, NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR); |
fe69af00 | 602 | |
603 | /* We only are OOB, so if the data has error, does not matter */ | |
604 | if (info->retcode == ERR_DBERR) | |
605 | info->retcode = ERR_NONE; | |
606 | break; | |
607 | ||
608 | case NAND_CMD_READ0: | |
609 | info->use_ecc = 1; | |
610 | info->retcode = ERR_NONE; | |
611 | info->buf_start = column; | |
612 | info->buf_count = mtd->writesize + mtd->oobsize; | |
613 | memset(info->data_buff, 0xFF, info->buf_count); | |
614 | ||
615 | if (prepare_read_prog_cmd(info, cmdset->read1, column, page_addr)) | |
616 | break; | |
617 | ||
223cf6c3 | 618 | pxa3xx_nand_do_cmd(info, NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR); |
fe69af00 | 619 | |
620 | if (info->retcode == ERR_DBERR) { | |
621 | /* for blank page (all 0xff), HW will calculate its ECC as | |
622 | * 0, which is different from the ECC information within | |
623 | * OOB, ignore such double bit errors | |
624 | */ | |
625 | if (is_buf_blank(info->data_buff, mtd->writesize)) | |
626 | info->retcode = ERR_NONE; | |
627 | } | |
628 | break; | |
629 | case NAND_CMD_SEQIN: | |
630 | info->buf_start = column; | |
631 | info->buf_count = mtd->writesize + mtd->oobsize; | |
632 | memset(info->data_buff, 0xff, info->buf_count); | |
633 | ||
634 | /* save column/page_addr for next CMD_PAGEPROG */ | |
635 | info->seqin_column = column; | |
636 | info->seqin_page_addr = page_addr; | |
637 | break; | |
638 | case NAND_CMD_PAGEPROG: | |
639 | info->use_ecc = (info->seqin_column >= mtd->writesize) ? 0 : 1; | |
640 | ||
641 | if (prepare_read_prog_cmd(info, cmdset->program, | |
642 | info->seqin_column, info->seqin_page_addr)) | |
643 | break; | |
644 | ||
645 | pxa3xx_nand_do_cmd(info, NDSR_WRDREQ); | |
646 | break; | |
647 | case NAND_CMD_ERASE1: | |
648 | if (prepare_erase_cmd(info, cmdset->erase, page_addr)) | |
649 | break; | |
650 | ||
651 | pxa3xx_nand_do_cmd(info, NDSR_CS0_BBD | NDSR_CS0_CMDD); | |
652 | break; | |
653 | case NAND_CMD_ERASE2: | |
654 | break; | |
655 | case NAND_CMD_READID: | |
656 | case NAND_CMD_STATUS: | |
657 | info->use_dma = 0; /* force PIO read */ | |
658 | info->buf_start = 0; | |
659 | info->buf_count = (command == NAND_CMD_READID) ? | |
c8c17c88 | 660 | info->read_id_bytes : 1; |
fe69af00 | 661 | |
662 | if (prepare_other_cmd(info, (command == NAND_CMD_READID) ? | |
663 | cmdset->read_id : cmdset->read_status)) | |
664 | break; | |
665 | ||
666 | pxa3xx_nand_do_cmd(info, NDSR_RDDREQ); | |
667 | break; | |
668 | case NAND_CMD_RESET: | |
669 | if (prepare_other_cmd(info, cmdset->reset)) | |
670 | break; | |
671 | ||
672 | ret = pxa3xx_nand_do_cmd(info, NDSR_CS0_CMDD); | |
673 | if (ret == 0) { | |
674 | int timeout = 2; | |
675 | uint32_t ndcr; | |
676 | ||
677 | while (timeout--) { | |
678 | if (nand_readl(info, NDSR) & NDSR_RDY) | |
679 | break; | |
680 | msleep(10); | |
681 | } | |
682 | ||
683 | ndcr = nand_readl(info, NDCR); | |
684 | nand_writel(info, NDCR, ndcr & ~NDCR_ND_RUN); | |
685 | } | |
686 | break; | |
687 | default: | |
688 | printk(KERN_ERR "non-supported command.\n"); | |
689 | break; | |
690 | } | |
691 | ||
692 | if (info->retcode == ERR_DBERR) { | |
693 | printk(KERN_ERR "double bit error @ page %08x\n", page_addr); | |
694 | info->retcode = ERR_NONE; | |
695 | } | |
696 | } | |
697 | ||
698 | static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd) | |
699 | { | |
700 | struct pxa3xx_nand_info *info = mtd->priv; | |
701 | char retval = 0xFF; | |
702 | ||
703 | if (info->buf_start < info->buf_count) | |
704 | /* Has just send a new command? */ | |
705 | retval = info->data_buff[info->buf_start++]; | |
706 | ||
707 | return retval; | |
708 | } | |
709 | ||
710 | static u16 pxa3xx_nand_read_word(struct mtd_info *mtd) | |
711 | { | |
712 | struct pxa3xx_nand_info *info = mtd->priv; | |
713 | u16 retval = 0xFFFF; | |
714 | ||
715 | if (!(info->buf_start & 0x01) && info->buf_start < info->buf_count) { | |
716 | retval = *((u16 *)(info->data_buff+info->buf_start)); | |
717 | info->buf_start += 2; | |
718 | } | |
719 | return retval; | |
720 | } | |
721 | ||
722 | static void pxa3xx_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) | |
723 | { | |
724 | struct pxa3xx_nand_info *info = mtd->priv; | |
725 | int real_len = min_t(size_t, len, info->buf_count - info->buf_start); | |
726 | ||
727 | memcpy(buf, info->data_buff + info->buf_start, real_len); | |
728 | info->buf_start += real_len; | |
729 | } | |
730 | ||
731 | static void pxa3xx_nand_write_buf(struct mtd_info *mtd, | |
732 | const uint8_t *buf, int len) | |
733 | { | |
734 | struct pxa3xx_nand_info *info = mtd->priv; | |
735 | int real_len = min_t(size_t, len, info->buf_count - info->buf_start); | |
736 | ||
737 | memcpy(info->data_buff + info->buf_start, buf, real_len); | |
738 | info->buf_start += real_len; | |
739 | } | |
740 | ||
741 | static int pxa3xx_nand_verify_buf(struct mtd_info *mtd, | |
742 | const uint8_t *buf, int len) | |
743 | { | |
744 | return 0; | |
745 | } | |
746 | ||
747 | static void pxa3xx_nand_select_chip(struct mtd_info *mtd, int chip) | |
748 | { | |
749 | return; | |
750 | } | |
751 | ||
752 | static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this) | |
753 | { | |
754 | struct pxa3xx_nand_info *info = mtd->priv; | |
755 | ||
756 | /* pxa3xx_nand_send_command has waited for command complete */ | |
757 | if (this->state == FL_WRITING || this->state == FL_ERASING) { | |
758 | if (info->retcode == ERR_NONE) | |
759 | return 0; | |
760 | else { | |
761 | /* | |
762 | * any error make it return 0x01 which will tell | |
763 | * the caller the erase and write fail | |
764 | */ | |
765 | return 0x01; | |
766 | } | |
767 | } | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
772 | static void pxa3xx_nand_ecc_hwctl(struct mtd_info *mtd, int mode) | |
773 | { | |
774 | return; | |
775 | } | |
776 | ||
777 | static int pxa3xx_nand_ecc_calculate(struct mtd_info *mtd, | |
778 | const uint8_t *dat, uint8_t *ecc_code) | |
779 | { | |
780 | return 0; | |
781 | } | |
782 | ||
783 | static int pxa3xx_nand_ecc_correct(struct mtd_info *mtd, | |
784 | uint8_t *dat, uint8_t *read_ecc, uint8_t *calc_ecc) | |
785 | { | |
786 | struct pxa3xx_nand_info *info = mtd->priv; | |
787 | /* | |
788 | * Any error include ERR_SEND_CMD, ERR_DBERR, ERR_BUSERR, we | |
789 | * consider it as a ecc error which will tell the caller the | |
790 | * read fail We have distinguish all the errors, but the | |
791 | * nand_read_ecc only check this function return value | |
223cf6c3 YP |
792 | * |
793 | * Corrected (single-bit) errors must also be noted. | |
fe69af00 | 794 | */ |
223cf6c3 YP |
795 | if (info->retcode == ERR_SBERR) |
796 | return 1; | |
797 | else if (info->retcode != ERR_NONE) | |
fe69af00 | 798 | return -1; |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | static int __readid(struct pxa3xx_nand_info *info, uint32_t *id) | |
804 | { | |
18c81b18 | 805 | const struct pxa3xx_nand_cmdset *cmdset = info->cmdset; |
fe69af00 | 806 | uint32_t ndcr; |
807 | uint8_t id_buff[8]; | |
808 | ||
809 | if (prepare_other_cmd(info, cmdset->read_id)) { | |
810 | printk(KERN_ERR "failed to prepare command\n"); | |
811 | return -EINVAL; | |
812 | } | |
813 | ||
814 | /* Send command */ | |
815 | if (write_cmd(info)) | |
816 | goto fail_timeout; | |
817 | ||
818 | /* Wait for CMDDM(command done successfully) */ | |
819 | if (wait_for_event(info, NDSR_RDDREQ)) | |
820 | goto fail_timeout; | |
821 | ||
822 | __raw_readsl(info->mmio_base + NDDB, id_buff, 2); | |
823 | *id = id_buff[0] | (id_buff[1] << 8); | |
824 | return 0; | |
825 | ||
826 | fail_timeout: | |
827 | ndcr = nand_readl(info, NDCR); | |
828 | nand_writel(info, NDCR, ndcr & ~NDCR_ND_RUN); | |
829 | udelay(10); | |
830 | return -ETIMEDOUT; | |
831 | } | |
832 | ||
833 | static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, | |
c8c17c88 | 834 | const struct pxa3xx_nand_flash *f) |
fe69af00 | 835 | { |
836 | struct platform_device *pdev = info->pdev; | |
837 | struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data; | |
838 | uint32_t ndcr = 0x00000FFF; /* disable all interrupts */ | |
839 | ||
840 | if (f->page_size != 2048 && f->page_size != 512) | |
841 | return -EINVAL; | |
842 | ||
843 | if (f->flash_width != 16 && f->flash_width != 8) | |
844 | return -EINVAL; | |
845 | ||
846 | /* calculate flash information */ | |
18c81b18 LW |
847 | info->cmdset = f->cmdset; |
848 | info->page_size = f->page_size; | |
849 | info->oob_buff = info->data_buff + f->page_size; | |
c8c17c88 | 850 | info->read_id_bytes = (f->page_size == 2048) ? 4 : 2; |
fe69af00 | 851 | |
852 | /* calculate addressing information */ | |
c8c17c88 | 853 | info->col_addr_cycles = (f->page_size == 2048) ? 2 : 1; |
fe69af00 | 854 | |
855 | if (f->num_blocks * f->page_per_block > 65536) | |
c8c17c88 | 856 | info->row_addr_cycles = 3; |
fe69af00 | 857 | else |
c8c17c88 | 858 | info->row_addr_cycles = 2; |
fe69af00 | 859 | |
860 | ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0; | |
c8c17c88 | 861 | ndcr |= (info->col_addr_cycles == 2) ? NDCR_RA_START : 0; |
fe69af00 | 862 | ndcr |= (f->page_per_block == 64) ? NDCR_PG_PER_BLK : 0; |
863 | ndcr |= (f->page_size == 2048) ? NDCR_PAGE_SZ : 0; | |
864 | ndcr |= (f->flash_width == 16) ? NDCR_DWIDTH_M : 0; | |
865 | ndcr |= (f->dfc_width == 16) ? NDCR_DWIDTH_C : 0; | |
866 | ||
c8c17c88 | 867 | ndcr |= NDCR_RD_ID_CNT(info->read_id_bytes); |
fe69af00 | 868 | ndcr |= NDCR_SPARE_EN; /* enable spare by default */ |
869 | ||
870 | info->reg_ndcr = ndcr; | |
871 | ||
872 | pxa3xx_nand_set_timing(info, f->timing); | |
fe69af00 | 873 | return 0; |
874 | } | |
875 | ||
f271049e MR |
876 | static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info) |
877 | { | |
878 | uint32_t ndcr = nand_readl(info, NDCR); | |
879 | struct nand_flash_dev *type = NULL; | |
18c81b18 | 880 | uint32_t id = -1, page_per_block, num_blocks; |
f271049e MR |
881 | int i; |
882 | ||
18c81b18 LW |
883 | page_per_block = ndcr & NDCR_PG_PER_BLK ? 64 : 32; |
884 | info->page_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512; | |
f271049e | 885 | /* set info fields needed to __readid */ |
18c81b18 | 886 | info->read_id_bytes = (info->page_size == 2048) ? 4 : 2; |
f271049e MR |
887 | info->reg_ndcr = ndcr; |
888 | ||
889 | if (__readid(info, &id)) | |
890 | return -ENODEV; | |
891 | ||
892 | /* Lookup the flash id */ | |
893 | id = (id >> 8) & 0xff; /* device id is byte 2 */ | |
894 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
895 | if (id == nand_flash_ids[i].id) { | |
896 | type = &nand_flash_ids[i]; | |
897 | break; | |
898 | } | |
899 | } | |
900 | ||
901 | if (!type) | |
902 | return -ENODEV; | |
903 | ||
904 | /* fill the missing flash information */ | |
18c81b18 LW |
905 | i = __ffs(page_per_block * info->page_size); |
906 | num_blocks = type->chipsize << (20 - i); | |
f271049e | 907 | |
f271049e | 908 | /* calculate addressing information */ |
18c81b18 | 909 | info->col_addr_cycles = (info->page_size == 2048) ? 2 : 1; |
f271049e | 910 | |
18c81b18 | 911 | if (num_blocks * page_per_block > 65536) |
f271049e MR |
912 | info->row_addr_cycles = 3; |
913 | else | |
914 | info->row_addr_cycles = 2; | |
915 | ||
18c81b18 LW |
916 | info->ndtr0cs0 = nand_readl(info, NDTR0CS0); |
917 | info->ndtr1cs0 = nand_readl(info, NDTR1CS0); | |
918 | info->cmdset = &default_cmdset; | |
f271049e MR |
919 | |
920 | return 0; | |
921 | } | |
922 | ||
c8ac3f81 ES |
923 | static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info, |
924 | const struct pxa3xx_nand_platform_data *pdata) | |
fe69af00 | 925 | { |
c8c17c88 | 926 | const struct pxa3xx_nand_flash *f; |
2675e944 | 927 | uint32_t id = -1; |
fe69af00 | 928 | int i; |
929 | ||
f271049e MR |
930 | if (pdata->keep_config) |
931 | if (pxa3xx_nand_detect_config(info) == 0) | |
932 | return 0; | |
933 | ||
227a886c LW |
934 | /* we use default timing to detect id */ |
935 | f = DEFAULT_FLASH_TYPE; | |
936 | pxa3xx_nand_config_flash(info, f); | |
937 | if (__readid(info, &id)) | |
938 | goto fail_detect; | |
939 | ||
940 | for (i=0; i<ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1; i++) { | |
941 | /* we first choose the flash definition from platfrom */ | |
942 | if (i < pdata->num_flash) | |
943 | f = pdata->flash + i; | |
944 | else | |
945 | f = &builtin_flash_types[i - pdata->num_flash + 1]; | |
946 | if (f->chip_id == id) { | |
947 | dev_info(&info->pdev->dev, "detect chip id: 0x%x\n", id); | |
948 | pxa3xx_nand_config_flash(info, f); | |
fe69af00 | 949 | return 0; |
227a886c | 950 | } |
fe69af00 | 951 | } |
952 | ||
2675e944 ES |
953 | dev_warn(&info->pdev->dev, |
954 | "failed to detect configured nand flash; found %04x instead of\n", | |
955 | id); | |
227a886c | 956 | fail_detect: |
fe69af00 | 957 | return -ENODEV; |
958 | } | |
959 | ||
960 | /* the maximum possible buffer size for large page with OOB data | |
961 | * is: 2048 + 64 = 2112 bytes, allocate a page here for both the | |
962 | * data buffer and the DMA descriptor | |
963 | */ | |
964 | #define MAX_BUFF_SIZE PAGE_SIZE | |
965 | ||
966 | static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info) | |
967 | { | |
968 | struct platform_device *pdev = info->pdev; | |
969 | int data_desc_offset = MAX_BUFF_SIZE - sizeof(struct pxa_dma_desc); | |
970 | ||
971 | if (use_dma == 0) { | |
972 | info->data_buff = kmalloc(MAX_BUFF_SIZE, GFP_KERNEL); | |
973 | if (info->data_buff == NULL) | |
974 | return -ENOMEM; | |
975 | return 0; | |
976 | } | |
977 | ||
978 | info->data_buff = dma_alloc_coherent(&pdev->dev, MAX_BUFF_SIZE, | |
979 | &info->data_buff_phys, GFP_KERNEL); | |
980 | if (info->data_buff == NULL) { | |
981 | dev_err(&pdev->dev, "failed to allocate dma buffer\n"); | |
982 | return -ENOMEM; | |
983 | } | |
984 | ||
985 | info->data_buff_size = MAX_BUFF_SIZE; | |
986 | info->data_desc = (void *)info->data_buff + data_desc_offset; | |
987 | info->data_desc_addr = info->data_buff_phys + data_desc_offset; | |
988 | ||
989 | info->data_dma_ch = pxa_request_dma("nand-data", DMA_PRIO_LOW, | |
990 | pxa3xx_nand_data_dma_irq, info); | |
991 | if (info->data_dma_ch < 0) { | |
992 | dev_err(&pdev->dev, "failed to request data dma\n"); | |
993 | dma_free_coherent(&pdev->dev, info->data_buff_size, | |
994 | info->data_buff, info->data_buff_phys); | |
995 | return info->data_dma_ch; | |
996 | } | |
997 | ||
998 | return 0; | |
999 | } | |
1000 | ||
1001 | static struct nand_ecclayout hw_smallpage_ecclayout = { | |
1002 | .eccbytes = 6, | |
1003 | .eccpos = {8, 9, 10, 11, 12, 13 }, | |
1004 | .oobfree = { {2, 6} } | |
1005 | }; | |
1006 | ||
1007 | static struct nand_ecclayout hw_largepage_ecclayout = { | |
1008 | .eccbytes = 24, | |
1009 | .eccpos = { | |
1010 | 40, 41, 42, 43, 44, 45, 46, 47, | |
1011 | 48, 49, 50, 51, 52, 53, 54, 55, | |
1012 | 56, 57, 58, 59, 60, 61, 62, 63}, | |
1013 | .oobfree = { {2, 38} } | |
1014 | }; | |
1015 | ||
1016 | static void pxa3xx_nand_init_mtd(struct mtd_info *mtd, | |
1017 | struct pxa3xx_nand_info *info) | |
1018 | { | |
fe69af00 | 1019 | struct nand_chip *this = &info->nand_chip; |
1020 | ||
18c81b18 | 1021 | this->options = (info->reg_ndcr & NDCR_DWIDTH_C) ? NAND_BUSWIDTH_16: 0; |
fe69af00 | 1022 | |
1023 | this->waitfunc = pxa3xx_nand_waitfunc; | |
1024 | this->select_chip = pxa3xx_nand_select_chip; | |
1025 | this->dev_ready = pxa3xx_nand_dev_ready; | |
1026 | this->cmdfunc = pxa3xx_nand_cmdfunc; | |
1027 | this->read_word = pxa3xx_nand_read_word; | |
1028 | this->read_byte = pxa3xx_nand_read_byte; | |
1029 | this->read_buf = pxa3xx_nand_read_buf; | |
1030 | this->write_buf = pxa3xx_nand_write_buf; | |
1031 | this->verify_buf = pxa3xx_nand_verify_buf; | |
1032 | ||
1033 | this->ecc.mode = NAND_ECC_HW; | |
1034 | this->ecc.hwctl = pxa3xx_nand_ecc_hwctl; | |
1035 | this->ecc.calculate = pxa3xx_nand_ecc_calculate; | |
1036 | this->ecc.correct = pxa3xx_nand_ecc_correct; | |
18c81b18 | 1037 | this->ecc.size = info->page_size; |
fe69af00 | 1038 | |
18c81b18 | 1039 | if (info->page_size == 2048) |
fe69af00 | 1040 | this->ecc.layout = &hw_largepage_ecclayout; |
1041 | else | |
1042 | this->ecc.layout = &hw_smallpage_ecclayout; | |
1043 | ||
a1c06ee1 | 1044 | this->chip_delay = 25; |
fe69af00 | 1045 | } |
1046 | ||
1047 | static int pxa3xx_nand_probe(struct platform_device *pdev) | |
1048 | { | |
1049 | struct pxa3xx_nand_platform_data *pdata; | |
1050 | struct pxa3xx_nand_info *info; | |
1051 | struct nand_chip *this; | |
1052 | struct mtd_info *mtd; | |
1053 | struct resource *r; | |
1054 | int ret = 0, irq; | |
1055 | ||
1056 | pdata = pdev->dev.platform_data; | |
1057 | ||
a1c06ee1 | 1058 | if (!pdata) { |
fe69af00 | 1059 | dev_err(&pdev->dev, "no platform data defined\n"); |
1060 | return -ENODEV; | |
1061 | } | |
1062 | ||
1063 | mtd = kzalloc(sizeof(struct mtd_info) + sizeof(struct pxa3xx_nand_info), | |
1064 | GFP_KERNEL); | |
a1c06ee1 | 1065 | if (!mtd) { |
fe69af00 | 1066 | dev_err(&pdev->dev, "failed to allocate memory\n"); |
1067 | return -ENOMEM; | |
a1c06ee1 | 1068 | } |
fe69af00 | 1069 | |
1070 | info = (struct pxa3xx_nand_info *)(&mtd[1]); | |
1071 | info->pdev = pdev; | |
1072 | ||
1073 | this = &info->nand_chip; | |
1074 | mtd->priv = info; | |
82a72d10 | 1075 | mtd->owner = THIS_MODULE; |
fe69af00 | 1076 | |
e0d8b13a | 1077 | info->clk = clk_get(&pdev->dev, NULL); |
fe69af00 | 1078 | if (IS_ERR(info->clk)) { |
1079 | dev_err(&pdev->dev, "failed to get nand clock\n"); | |
1080 | ret = PTR_ERR(info->clk); | |
1081 | goto fail_free_mtd; | |
1082 | } | |
1083 | clk_enable(info->clk); | |
1084 | ||
1085 | r = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
1086 | if (r == NULL) { | |
1087 | dev_err(&pdev->dev, "no resource defined for data DMA\n"); | |
1088 | ret = -ENXIO; | |
1089 | goto fail_put_clk; | |
1090 | } | |
1091 | info->drcmr_dat = r->start; | |
1092 | ||
1093 | r = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
1094 | if (r == NULL) { | |
1095 | dev_err(&pdev->dev, "no resource defined for command DMA\n"); | |
1096 | ret = -ENXIO; | |
1097 | goto fail_put_clk; | |
1098 | } | |
1099 | info->drcmr_cmd = r->start; | |
1100 | ||
1101 | irq = platform_get_irq(pdev, 0); | |
1102 | if (irq < 0) { | |
1103 | dev_err(&pdev->dev, "no IRQ resource defined\n"); | |
1104 | ret = -ENXIO; | |
1105 | goto fail_put_clk; | |
1106 | } | |
1107 | ||
1108 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1109 | if (r == NULL) { | |
1110 | dev_err(&pdev->dev, "no IO memory resource defined\n"); | |
1111 | ret = -ENODEV; | |
1112 | goto fail_put_clk; | |
1113 | } | |
1114 | ||
b2ed3680 | 1115 | r = request_mem_region(r->start, resource_size(r), pdev->name); |
fe69af00 | 1116 | if (r == NULL) { |
1117 | dev_err(&pdev->dev, "failed to request memory resource\n"); | |
1118 | ret = -EBUSY; | |
1119 | goto fail_put_clk; | |
1120 | } | |
1121 | ||
b2ed3680 | 1122 | info->mmio_base = ioremap(r->start, resource_size(r)); |
fe69af00 | 1123 | if (info->mmio_base == NULL) { |
1124 | dev_err(&pdev->dev, "ioremap() failed\n"); | |
1125 | ret = -ENODEV; | |
1126 | goto fail_free_res; | |
1127 | } | |
8638fac8 | 1128 | info->mmio_phys = r->start; |
fe69af00 | 1129 | |
1130 | ret = pxa3xx_nand_init_buff(info); | |
1131 | if (ret) | |
1132 | goto fail_free_io; | |
1133 | ||
346e1259 HZ |
1134 | /* initialize all interrupts to be disabled */ |
1135 | disable_int(info, NDSR_MASK); | |
1136 | ||
dbf5986a HZ |
1137 | ret = request_irq(irq, pxa3xx_nand_irq, IRQF_DISABLED, |
1138 | pdev->name, info); | |
fe69af00 | 1139 | if (ret < 0) { |
1140 | dev_err(&pdev->dev, "failed to request IRQ\n"); | |
1141 | goto fail_free_buf; | |
1142 | } | |
1143 | ||
c8ac3f81 | 1144 | ret = pxa3xx_nand_detect_flash(info, pdata); |
fe69af00 | 1145 | if (ret) { |
1146 | dev_err(&pdev->dev, "failed to detect flash\n"); | |
1147 | ret = -ENODEV; | |
1148 | goto fail_free_irq; | |
1149 | } | |
1150 | ||
1151 | pxa3xx_nand_init_mtd(mtd, info); | |
1152 | ||
1153 | platform_set_drvdata(pdev, mtd); | |
1154 | ||
1155 | if (nand_scan(mtd, 1)) { | |
1156 | dev_err(&pdev->dev, "failed to scan nand\n"); | |
1157 | ret = -ENXIO; | |
1158 | goto fail_free_irq; | |
1159 | } | |
1160 | ||
99d38964 | 1161 | #ifdef CONFIG_MTD_PARTITIONS |
bff3c10d MKB |
1162 | if (mtd_has_cmdlinepart()) { |
1163 | static const char *probes[] = { "cmdlinepart", NULL }; | |
1164 | struct mtd_partition *parts; | |
1165 | int nr_parts; | |
1166 | ||
1167 | nr_parts = parse_mtd_partitions(mtd, probes, &parts, 0); | |
1168 | ||
1169 | if (nr_parts) | |
1170 | return add_mtd_partitions(mtd, parts, nr_parts); | |
1171 | } | |
1172 | ||
fe69af00 | 1173 | return add_mtd_partitions(mtd, pdata->parts, pdata->nr_parts); |
99d38964 MB |
1174 | #else |
1175 | return 0; | |
1176 | #endif | |
fe69af00 | 1177 | |
1178 | fail_free_irq: | |
dbf5986a | 1179 | free_irq(irq, info); |
fe69af00 | 1180 | fail_free_buf: |
1181 | if (use_dma) { | |
1182 | pxa_free_dma(info->data_dma_ch); | |
1183 | dma_free_coherent(&pdev->dev, info->data_buff_size, | |
1184 | info->data_buff, info->data_buff_phys); | |
1185 | } else | |
1186 | kfree(info->data_buff); | |
1187 | fail_free_io: | |
1188 | iounmap(info->mmio_base); | |
1189 | fail_free_res: | |
b2ed3680 | 1190 | release_mem_region(r->start, resource_size(r)); |
fe69af00 | 1191 | fail_put_clk: |
1192 | clk_disable(info->clk); | |
1193 | clk_put(info->clk); | |
1194 | fail_free_mtd: | |
1195 | kfree(mtd); | |
1196 | return ret; | |
1197 | } | |
1198 | ||
1199 | static int pxa3xx_nand_remove(struct platform_device *pdev) | |
1200 | { | |
1201 | struct mtd_info *mtd = platform_get_drvdata(pdev); | |
1202 | struct pxa3xx_nand_info *info = mtd->priv; | |
82a72d10 | 1203 | struct resource *r; |
dbf5986a | 1204 | int irq; |
fe69af00 | 1205 | |
1206 | platform_set_drvdata(pdev, NULL); | |
1207 | ||
1208 | del_mtd_device(mtd); | |
99d38964 | 1209 | #ifdef CONFIG_MTD_PARTITIONS |
fe69af00 | 1210 | del_mtd_partitions(mtd); |
99d38964 | 1211 | #endif |
dbf5986a HZ |
1212 | irq = platform_get_irq(pdev, 0); |
1213 | if (irq >= 0) | |
1214 | free_irq(irq, info); | |
fe69af00 | 1215 | if (use_dma) { |
1216 | pxa_free_dma(info->data_dma_ch); | |
1217 | dma_free_writecombine(&pdev->dev, info->data_buff_size, | |
1218 | info->data_buff, info->data_buff_phys); | |
1219 | } else | |
1220 | kfree(info->data_buff); | |
82a72d10 MR |
1221 | |
1222 | iounmap(info->mmio_base); | |
1223 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
1224 | release_mem_region(r->start, resource_size(r)); | |
1225 | ||
1226 | clk_disable(info->clk); | |
1227 | clk_put(info->clk); | |
1228 | ||
fe69af00 | 1229 | kfree(mtd); |
1230 | return 0; | |
1231 | } | |
1232 | ||
1233 | #ifdef CONFIG_PM | |
1234 | static int pxa3xx_nand_suspend(struct platform_device *pdev, pm_message_t state) | |
1235 | { | |
1236 | struct mtd_info *mtd = (struct mtd_info *)platform_get_drvdata(pdev); | |
1237 | struct pxa3xx_nand_info *info = mtd->priv; | |
1238 | ||
1239 | if (info->state != STATE_READY) { | |
1240 | dev_err(&pdev->dev, "driver busy, state = %d\n", info->state); | |
1241 | return -EAGAIN; | |
1242 | } | |
1243 | ||
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | static int pxa3xx_nand_resume(struct platform_device *pdev) | |
1248 | { | |
1249 | struct mtd_info *mtd = (struct mtd_info *)platform_get_drvdata(pdev); | |
1250 | struct pxa3xx_nand_info *info = mtd->priv; | |
1251 | ||
18c81b18 LW |
1252 | nand_writel(info, NDTR0CS0, info->ndtr0cs0); |
1253 | nand_writel(info, NDTR1CS0, info->ndtr1cs0); | |
fe69af00 | 1254 | clk_enable(info->clk); |
1255 | ||
18c81b18 | 1256 | return 0; |
fe69af00 | 1257 | } |
1258 | #else | |
1259 | #define pxa3xx_nand_suspend NULL | |
1260 | #define pxa3xx_nand_resume NULL | |
1261 | #endif | |
1262 | ||
1263 | static struct platform_driver pxa3xx_nand_driver = { | |
1264 | .driver = { | |
1265 | .name = "pxa3xx-nand", | |
1266 | }, | |
1267 | .probe = pxa3xx_nand_probe, | |
1268 | .remove = pxa3xx_nand_remove, | |
1269 | .suspend = pxa3xx_nand_suspend, | |
1270 | .resume = pxa3xx_nand_resume, | |
1271 | }; | |
1272 | ||
1273 | static int __init pxa3xx_nand_init(void) | |
1274 | { | |
1275 | return platform_driver_register(&pxa3xx_nand_driver); | |
1276 | } | |
1277 | module_init(pxa3xx_nand_init); | |
1278 | ||
1279 | static void __exit pxa3xx_nand_exit(void) | |
1280 | { | |
1281 | platform_driver_unregister(&pxa3xx_nand_driver); | |
1282 | } | |
1283 | module_exit(pxa3xx_nand_exit); | |
1284 | ||
1285 | MODULE_LICENSE("GPL"); | |
1286 | MODULE_DESCRIPTION("PXA3xx NAND controller driver"); |