Commit | Line | Data |
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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. | |
de484a38 EG |
10 | * |
11 | * See Documentation/mtd/nand/pxa3xx-nand.txt for more details. | |
fe69af00 | 12 | */ |
13 | ||
a88bdbb5 | 14 | #include <linux/kernel.h> |
fe69af00 | 15 | #include <linux/module.h> |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/dma-mapping.h> | |
19 | #include <linux/delay.h> | |
20 | #include <linux/clk.h> | |
21 | #include <linux/mtd/mtd.h> | |
22 | #include <linux/mtd/nand.h> | |
23 | #include <linux/mtd/partitions.h> | |
a1c06ee1 | 24 | #include <linux/io.h> |
afca11ec | 25 | #include <linux/iopoll.h> |
a1c06ee1 | 26 | #include <linux/irq.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1e7ba630 DM |
28 | #include <linux/of.h> |
29 | #include <linux/of_device.h> | |
776f265e | 30 | #include <linux/of_mtd.h> |
fe69af00 | 31 | |
ce914e6b | 32 | #if defined(CONFIG_ARM) && (defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)) |
f4db2e3a EG |
33 | #define ARCH_HAS_DMA |
34 | #endif | |
35 | ||
36 | #ifdef ARCH_HAS_DMA | |
afb5b5c9 | 37 | #include <mach/dma.h> |
f4db2e3a EG |
38 | #endif |
39 | ||
293b2da1 | 40 | #include <linux/platform_data/mtd-nand-pxa3xx.h> |
fe69af00 | 41 | |
e5860c18 NMG |
42 | #define CHIP_DELAY_TIMEOUT msecs_to_jiffies(200) |
43 | #define NAND_STOP_DELAY msecs_to_jiffies(40) | |
4eb2da89 | 44 | #define PAGE_CHUNK_SIZE (2048) |
fe69af00 | 45 | |
62e8b851 EG |
46 | /* |
47 | * Define a buffer size for the initial command that detects the flash device: | |
c1634097 EG |
48 | * STATUS, READID and PARAM. |
49 | * ONFI param page is 256 bytes, and there are three redundant copies | |
50 | * to be read. JEDEC param page is 512 bytes, and there are also three | |
51 | * redundant copies to be read. | |
52 | * Hence this buffer should be at least 512 x 3. Let's pick 2048. | |
62e8b851 | 53 | */ |
c1634097 | 54 | #define INIT_BUFFER_SIZE 2048 |
62e8b851 | 55 | |
fe69af00 | 56 | /* registers and bit definitions */ |
57 | #define NDCR (0x00) /* Control register */ | |
58 | #define NDTR0CS0 (0x04) /* Timing Parameter 0 for CS0 */ | |
59 | #define NDTR1CS0 (0x0C) /* Timing Parameter 1 for CS0 */ | |
60 | #define NDSR (0x14) /* Status Register */ | |
61 | #define NDPCR (0x18) /* Page Count Register */ | |
62 | #define NDBDR0 (0x1C) /* Bad Block Register 0 */ | |
63 | #define NDBDR1 (0x20) /* Bad Block Register 1 */ | |
43bcfd2b | 64 | #define NDECCCTRL (0x28) /* ECC control */ |
fe69af00 | 65 | #define NDDB (0x40) /* Data Buffer */ |
66 | #define NDCB0 (0x48) /* Command Buffer0 */ | |
67 | #define NDCB1 (0x4C) /* Command Buffer1 */ | |
68 | #define NDCB2 (0x50) /* Command Buffer2 */ | |
69 | ||
70 | #define NDCR_SPARE_EN (0x1 << 31) | |
71 | #define NDCR_ECC_EN (0x1 << 30) | |
72 | #define NDCR_DMA_EN (0x1 << 29) | |
73 | #define NDCR_ND_RUN (0x1 << 28) | |
74 | #define NDCR_DWIDTH_C (0x1 << 27) | |
75 | #define NDCR_DWIDTH_M (0x1 << 26) | |
76 | #define NDCR_PAGE_SZ (0x1 << 24) | |
77 | #define NDCR_NCSX (0x1 << 23) | |
78 | #define NDCR_ND_MODE (0x3 << 21) | |
79 | #define NDCR_NAND_MODE (0x0) | |
80 | #define NDCR_CLR_PG_CNT (0x1 << 20) | |
f8155a40 | 81 | #define NDCR_STOP_ON_UNCOR (0x1 << 19) |
fe69af00 | 82 | #define NDCR_RD_ID_CNT_MASK (0x7 << 16) |
83 | #define NDCR_RD_ID_CNT(x) (((x) << 16) & NDCR_RD_ID_CNT_MASK) | |
84 | ||
85 | #define NDCR_RA_START (0x1 << 15) | |
86 | #define NDCR_PG_PER_BLK (0x1 << 14) | |
87 | #define NDCR_ND_ARB_EN (0x1 << 12) | |
f8155a40 | 88 | #define NDCR_INT_MASK (0xFFF) |
fe69af00 | 89 | |
90 | #define NDSR_MASK (0xfff) | |
87f5336e EG |
91 | #define NDSR_ERR_CNT_OFF (16) |
92 | #define NDSR_ERR_CNT_MASK (0x1f) | |
93 | #define NDSR_ERR_CNT(sr) ((sr >> NDSR_ERR_CNT_OFF) & NDSR_ERR_CNT_MASK) | |
f8155a40 LW |
94 | #define NDSR_RDY (0x1 << 12) |
95 | #define NDSR_FLASH_RDY (0x1 << 11) | |
fe69af00 | 96 | #define NDSR_CS0_PAGED (0x1 << 10) |
97 | #define NDSR_CS1_PAGED (0x1 << 9) | |
98 | #define NDSR_CS0_CMDD (0x1 << 8) | |
99 | #define NDSR_CS1_CMDD (0x1 << 7) | |
100 | #define NDSR_CS0_BBD (0x1 << 6) | |
101 | #define NDSR_CS1_BBD (0x1 << 5) | |
87f5336e EG |
102 | #define NDSR_UNCORERR (0x1 << 4) |
103 | #define NDSR_CORERR (0x1 << 3) | |
fe69af00 | 104 | #define NDSR_WRDREQ (0x1 << 2) |
105 | #define NDSR_RDDREQ (0x1 << 1) | |
106 | #define NDSR_WRCMDREQ (0x1) | |
107 | ||
41a63430 | 108 | #define NDCB0_LEN_OVRD (0x1 << 28) |
4eb2da89 | 109 | #define NDCB0_ST_ROW_EN (0x1 << 26) |
fe69af00 | 110 | #define NDCB0_AUTO_RS (0x1 << 25) |
111 | #define NDCB0_CSEL (0x1 << 24) | |
70ed8523 EG |
112 | #define NDCB0_EXT_CMD_TYPE_MASK (0x7 << 29) |
113 | #define NDCB0_EXT_CMD_TYPE(x) (((x) << 29) & NDCB0_EXT_CMD_TYPE_MASK) | |
fe69af00 | 114 | #define NDCB0_CMD_TYPE_MASK (0x7 << 21) |
115 | #define NDCB0_CMD_TYPE(x) (((x) << 21) & NDCB0_CMD_TYPE_MASK) | |
116 | #define NDCB0_NC (0x1 << 20) | |
117 | #define NDCB0_DBC (0x1 << 19) | |
118 | #define NDCB0_ADDR_CYC_MASK (0x7 << 16) | |
119 | #define NDCB0_ADDR_CYC(x) (((x) << 16) & NDCB0_ADDR_CYC_MASK) | |
120 | #define NDCB0_CMD2_MASK (0xff << 8) | |
121 | #define NDCB0_CMD1_MASK (0xff) | |
122 | #define NDCB0_ADDR_CYC_SHIFT (16) | |
123 | ||
70ed8523 EG |
124 | #define EXT_CMD_TYPE_DISPATCH 6 /* Command dispatch */ |
125 | #define EXT_CMD_TYPE_NAKED_RW 5 /* Naked read or Naked write */ | |
126 | #define EXT_CMD_TYPE_READ 4 /* Read */ | |
127 | #define EXT_CMD_TYPE_DISP_WR 4 /* Command dispatch with write */ | |
128 | #define EXT_CMD_TYPE_FINAL 3 /* Final command */ | |
129 | #define EXT_CMD_TYPE_LAST_RW 1 /* Last naked read/write */ | |
130 | #define EXT_CMD_TYPE_MONO 0 /* Monolithic read/write */ | |
131 | ||
fe69af00 | 132 | /* macros for registers read/write */ |
133 | #define nand_writel(info, off, val) \ | |
b7e46062 | 134 | writel_relaxed((val), (info)->mmio_base + (off)) |
fe69af00 | 135 | |
136 | #define nand_readl(info, off) \ | |
b7e46062 | 137 | readl_relaxed((info)->mmio_base + (off)) |
fe69af00 | 138 | |
139 | /* error code and state */ | |
140 | enum { | |
141 | ERR_NONE = 0, | |
142 | ERR_DMABUSERR = -1, | |
143 | ERR_SENDCMD = -2, | |
87f5336e | 144 | ERR_UNCORERR = -3, |
fe69af00 | 145 | ERR_BBERR = -4, |
87f5336e | 146 | ERR_CORERR = -5, |
fe69af00 | 147 | }; |
148 | ||
149 | enum { | |
f8155a40 | 150 | STATE_IDLE = 0, |
d456882b | 151 | STATE_PREPARED, |
fe69af00 | 152 | STATE_CMD_HANDLE, |
153 | STATE_DMA_READING, | |
154 | STATE_DMA_WRITING, | |
155 | STATE_DMA_DONE, | |
156 | STATE_PIO_READING, | |
157 | STATE_PIO_WRITING, | |
f8155a40 LW |
158 | STATE_CMD_DONE, |
159 | STATE_READY, | |
fe69af00 | 160 | }; |
161 | ||
c0f3b864 EG |
162 | enum pxa3xx_nand_variant { |
163 | PXA3XX_NAND_VARIANT_PXA, | |
164 | PXA3XX_NAND_VARIANT_ARMADA370, | |
165 | }; | |
166 | ||
d456882b LW |
167 | struct pxa3xx_nand_host { |
168 | struct nand_chip chip; | |
d456882b LW |
169 | struct mtd_info *mtd; |
170 | void *info_data; | |
171 | ||
172 | /* page size of attached chip */ | |
d456882b | 173 | int use_ecc; |
f3c8cfc2 | 174 | int cs; |
fe69af00 | 175 | |
d456882b LW |
176 | /* calculated from pxa3xx_nand_flash data */ |
177 | unsigned int col_addr_cycles; | |
178 | unsigned int row_addr_cycles; | |
179 | size_t read_id_bytes; | |
180 | ||
d456882b LW |
181 | }; |
182 | ||
183 | struct pxa3xx_nand_info { | |
401e67e2 | 184 | struct nand_hw_control controller; |
fe69af00 | 185 | struct platform_device *pdev; |
fe69af00 | 186 | |
187 | struct clk *clk; | |
188 | void __iomem *mmio_base; | |
8638fac8 | 189 | unsigned long mmio_phys; |
55d9fd6e | 190 | struct completion cmd_complete, dev_ready; |
fe69af00 | 191 | |
192 | unsigned int buf_start; | |
193 | unsigned int buf_count; | |
62e8b851 | 194 | unsigned int buf_size; |
fa543bef EG |
195 | unsigned int data_buff_pos; |
196 | unsigned int oob_buff_pos; | |
fe69af00 | 197 | |
198 | /* DMA information */ | |
199 | int drcmr_dat; | |
200 | int drcmr_cmd; | |
201 | ||
202 | unsigned char *data_buff; | |
18c81b18 | 203 | unsigned char *oob_buff; |
fe69af00 | 204 | dma_addr_t data_buff_phys; |
fe69af00 | 205 | int data_dma_ch; |
206 | struct pxa_dma_desc *data_desc; | |
207 | dma_addr_t data_desc_addr; | |
208 | ||
f3c8cfc2 | 209 | struct pxa3xx_nand_host *host[NUM_CHIP_SELECT]; |
fe69af00 | 210 | unsigned int state; |
211 | ||
c0f3b864 EG |
212 | /* |
213 | * This driver supports NFCv1 (as found in PXA SoC) | |
214 | * and NFCv2 (as found in Armada 370/XP SoC). | |
215 | */ | |
216 | enum pxa3xx_nand_variant variant; | |
217 | ||
f3c8cfc2 | 218 | int cs; |
fe69af00 | 219 | int use_ecc; /* use HW ECC ? */ |
43bcfd2b | 220 | int ecc_bch; /* using BCH ECC? */ |
fe69af00 | 221 | int use_dma; /* use DMA ? */ |
5bb653e8 | 222 | int use_spare; /* use spare ? */ |
55d9fd6e | 223 | int need_wait; |
fe69af00 | 224 | |
2128b08c | 225 | unsigned int data_size; /* data to be read from FIFO */ |
70ed8523 | 226 | unsigned int chunk_size; /* split commands chunk size */ |
d456882b | 227 | unsigned int oob_size; |
43bcfd2b EG |
228 | unsigned int spare_size; |
229 | unsigned int ecc_size; | |
87f5336e EG |
230 | unsigned int ecc_err_cnt; |
231 | unsigned int max_bitflips; | |
fe69af00 | 232 | int retcode; |
fe69af00 | 233 | |
48cf7efa EG |
234 | /* cached register value */ |
235 | uint32_t reg_ndcr; | |
236 | uint32_t ndtr0cs0; | |
237 | uint32_t ndtr1cs0; | |
238 | ||
fe69af00 | 239 | /* generated NDCBx register values */ |
240 | uint32_t ndcb0; | |
241 | uint32_t ndcb1; | |
242 | uint32_t ndcb2; | |
3a1a344a | 243 | uint32_t ndcb3; |
fe69af00 | 244 | }; |
245 | ||
90ab5ee9 | 246 | static bool use_dma = 1; |
fe69af00 | 247 | module_param(use_dma, bool, 0444); |
25985edc | 248 | MODULE_PARM_DESC(use_dma, "enable DMA for data transferring to/from NAND HW"); |
fe69af00 | 249 | |
c1f82478 | 250 | static struct pxa3xx_nand_timing timing[] = { |
227a886c LW |
251 | { 40, 80, 60, 100, 80, 100, 90000, 400, 40, }, |
252 | { 10, 0, 20, 40, 30, 40, 11123, 110, 10, }, | |
253 | { 10, 25, 15, 25, 15, 30, 25000, 60, 10, }, | |
254 | { 10, 35, 15, 25, 15, 25, 25000, 60, 10, }, | |
d3490dfd HZ |
255 | }; |
256 | ||
c1f82478 | 257 | static struct pxa3xx_nand_flash builtin_flash_types[] = { |
4332c116 LW |
258 | { "DEFAULT FLASH", 0, 0, 2048, 8, 8, 0, &timing[0] }, |
259 | { "64MiB 16-bit", 0x46ec, 32, 512, 16, 16, 4096, &timing[1] }, | |
260 | { "256MiB 8-bit", 0xdaec, 64, 2048, 8, 8, 2048, &timing[1] }, | |
261 | { "4GiB 8-bit", 0xd7ec, 128, 4096, 8, 8, 8192, &timing[1] }, | |
262 | { "128MiB 8-bit", 0xa12c, 64, 2048, 8, 8, 1024, &timing[2] }, | |
263 | { "128MiB 16-bit", 0xb12c, 64, 2048, 16, 16, 1024, &timing[2] }, | |
264 | { "512MiB 8-bit", 0xdc2c, 64, 2048, 8, 8, 4096, &timing[2] }, | |
265 | { "512MiB 16-bit", 0xcc2c, 64, 2048, 16, 16, 4096, &timing[2] }, | |
266 | { "256MiB 16-bit", 0xba20, 64, 2048, 16, 16, 2048, &timing[3] }, | |
d3490dfd HZ |
267 | }; |
268 | ||
776f265e EG |
269 | static u8 bbt_pattern[] = {'M', 'V', 'B', 'b', 't', '0' }; |
270 | static u8 bbt_mirror_pattern[] = {'1', 't', 'b', 'B', 'V', 'M' }; | |
271 | ||
272 | static struct nand_bbt_descr bbt_main_descr = { | |
273 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
274 | | NAND_BBT_2BIT | NAND_BBT_VERSION, | |
275 | .offs = 8, | |
276 | .len = 6, | |
277 | .veroffs = 14, | |
278 | .maxblocks = 8, /* Last 8 blocks in each chip */ | |
279 | .pattern = bbt_pattern | |
280 | }; | |
281 | ||
282 | static struct nand_bbt_descr bbt_mirror_descr = { | |
283 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
284 | | NAND_BBT_2BIT | NAND_BBT_VERSION, | |
285 | .offs = 8, | |
286 | .len = 6, | |
287 | .veroffs = 14, | |
288 | .maxblocks = 8, /* Last 8 blocks in each chip */ | |
289 | .pattern = bbt_mirror_pattern | |
290 | }; | |
291 | ||
3db227b6 RG |
292 | static struct nand_ecclayout ecc_layout_2KB_bch4bit = { |
293 | .eccbytes = 32, | |
294 | .eccpos = { | |
295 | 32, 33, 34, 35, 36, 37, 38, 39, | |
296 | 40, 41, 42, 43, 44, 45, 46, 47, | |
297 | 48, 49, 50, 51, 52, 53, 54, 55, | |
298 | 56, 57, 58, 59, 60, 61, 62, 63}, | |
299 | .oobfree = { {2, 30} } | |
300 | }; | |
301 | ||
70ed8523 EG |
302 | static struct nand_ecclayout ecc_layout_4KB_bch4bit = { |
303 | .eccbytes = 64, | |
304 | .eccpos = { | |
305 | 32, 33, 34, 35, 36, 37, 38, 39, | |
306 | 40, 41, 42, 43, 44, 45, 46, 47, | |
307 | 48, 49, 50, 51, 52, 53, 54, 55, | |
308 | 56, 57, 58, 59, 60, 61, 62, 63, | |
309 | 96, 97, 98, 99, 100, 101, 102, 103, | |
310 | 104, 105, 106, 107, 108, 109, 110, 111, | |
311 | 112, 113, 114, 115, 116, 117, 118, 119, | |
312 | 120, 121, 122, 123, 124, 125, 126, 127}, | |
313 | /* Bootrom looks in bytes 0 & 5 for bad blocks */ | |
314 | .oobfree = { {6, 26}, { 64, 32} } | |
315 | }; | |
316 | ||
317 | static struct nand_ecclayout ecc_layout_4KB_bch8bit = { | |
318 | .eccbytes = 128, | |
319 | .eccpos = { | |
320 | 32, 33, 34, 35, 36, 37, 38, 39, | |
321 | 40, 41, 42, 43, 44, 45, 46, 47, | |
322 | 48, 49, 50, 51, 52, 53, 54, 55, | |
323 | 56, 57, 58, 59, 60, 61, 62, 63}, | |
324 | .oobfree = { } | |
325 | }; | |
326 | ||
227a886c LW |
327 | /* Define a default flash type setting serve as flash detecting only */ |
328 | #define DEFAULT_FLASH_TYPE (&builtin_flash_types[0]) | |
329 | ||
fe69af00 | 330 | #define NDTR0_tCH(c) (min((c), 7) << 19) |
331 | #define NDTR0_tCS(c) (min((c), 7) << 16) | |
332 | #define NDTR0_tWH(c) (min((c), 7) << 11) | |
333 | #define NDTR0_tWP(c) (min((c), 7) << 8) | |
334 | #define NDTR0_tRH(c) (min((c), 7) << 3) | |
335 | #define NDTR0_tRP(c) (min((c), 7) << 0) | |
336 | ||
337 | #define NDTR1_tR(c) (min((c), 65535) << 16) | |
338 | #define NDTR1_tWHR(c) (min((c), 15) << 4) | |
339 | #define NDTR1_tAR(c) (min((c), 15) << 0) | |
340 | ||
341 | /* convert nano-seconds to nand flash controller clock cycles */ | |
93b352fc | 342 | #define ns2cycle(ns, clk) (int)((ns) * (clk / 1000000) / 1000) |
fe69af00 | 343 | |
17754ad6 | 344 | static const struct of_device_id pxa3xx_nand_dt_ids[] = { |
c7e9c7e7 EG |
345 | { |
346 | .compatible = "marvell,pxa3xx-nand", | |
347 | .data = (void *)PXA3XX_NAND_VARIANT_PXA, | |
348 | }, | |
1963ff97 EG |
349 | { |
350 | .compatible = "marvell,armada370-nand", | |
351 | .data = (void *)PXA3XX_NAND_VARIANT_ARMADA370, | |
352 | }, | |
c7e9c7e7 EG |
353 | {} |
354 | }; | |
355 | MODULE_DEVICE_TABLE(of, pxa3xx_nand_dt_ids); | |
356 | ||
357 | static enum pxa3xx_nand_variant | |
358 | pxa3xx_nand_get_variant(struct platform_device *pdev) | |
359 | { | |
360 | const struct of_device_id *of_id = | |
361 | of_match_device(pxa3xx_nand_dt_ids, &pdev->dev); | |
362 | if (!of_id) | |
363 | return PXA3XX_NAND_VARIANT_PXA; | |
364 | return (enum pxa3xx_nand_variant)of_id->data; | |
365 | } | |
366 | ||
d456882b | 367 | static void pxa3xx_nand_set_timing(struct pxa3xx_nand_host *host, |
7dad482e | 368 | const struct pxa3xx_nand_timing *t) |
fe69af00 | 369 | { |
d456882b | 370 | struct pxa3xx_nand_info *info = host->info_data; |
fe69af00 | 371 | unsigned long nand_clk = clk_get_rate(info->clk); |
372 | uint32_t ndtr0, ndtr1; | |
373 | ||
374 | ndtr0 = NDTR0_tCH(ns2cycle(t->tCH, nand_clk)) | | |
375 | NDTR0_tCS(ns2cycle(t->tCS, nand_clk)) | | |
376 | NDTR0_tWH(ns2cycle(t->tWH, nand_clk)) | | |
377 | NDTR0_tWP(ns2cycle(t->tWP, nand_clk)) | | |
378 | NDTR0_tRH(ns2cycle(t->tRH, nand_clk)) | | |
379 | NDTR0_tRP(ns2cycle(t->tRP, nand_clk)); | |
380 | ||
381 | ndtr1 = NDTR1_tR(ns2cycle(t->tR, nand_clk)) | | |
382 | NDTR1_tWHR(ns2cycle(t->tWHR, nand_clk)) | | |
383 | NDTR1_tAR(ns2cycle(t->tAR, nand_clk)); | |
384 | ||
48cf7efa EG |
385 | info->ndtr0cs0 = ndtr0; |
386 | info->ndtr1cs0 = ndtr1; | |
fe69af00 | 387 | nand_writel(info, NDTR0CS0, ndtr0); |
388 | nand_writel(info, NDTR1CS0, ndtr1); | |
389 | } | |
390 | ||
6a3e4865 EG |
391 | /* |
392 | * Set the data and OOB size, depending on the selected | |
393 | * spare and ECC configuration. | |
394 | * Only applicable to READ0, READOOB and PAGEPROG commands. | |
395 | */ | |
fa543bef EG |
396 | static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info, |
397 | struct mtd_info *mtd) | |
fe69af00 | 398 | { |
48cf7efa | 399 | int oob_enable = info->reg_ndcr & NDCR_SPARE_EN; |
9d8b1043 | 400 | |
fa543bef | 401 | info->data_size = mtd->writesize; |
43bcfd2b | 402 | if (!oob_enable) |
9d8b1043 | 403 | return; |
9d8b1043 | 404 | |
43bcfd2b EG |
405 | info->oob_size = info->spare_size; |
406 | if (!info->use_ecc) | |
407 | info->oob_size += info->ecc_size; | |
18c81b18 LW |
408 | } |
409 | ||
f8155a40 LW |
410 | /** |
411 | * NOTE: it is a must to set ND_RUN firstly, then write | |
412 | * command buffer, otherwise, it does not work. | |
413 | * We enable all the interrupt at the same time, and | |
414 | * let pxa3xx_nand_irq to handle all logic. | |
415 | */ | |
416 | static void pxa3xx_nand_start(struct pxa3xx_nand_info *info) | |
417 | { | |
418 | uint32_t ndcr; | |
419 | ||
48cf7efa | 420 | ndcr = info->reg_ndcr; |
cd9d1182 | 421 | |
43bcfd2b | 422 | if (info->use_ecc) { |
cd9d1182 | 423 | ndcr |= NDCR_ECC_EN; |
43bcfd2b EG |
424 | if (info->ecc_bch) |
425 | nand_writel(info, NDECCCTRL, 0x1); | |
426 | } else { | |
cd9d1182 | 427 | ndcr &= ~NDCR_ECC_EN; |
43bcfd2b EG |
428 | if (info->ecc_bch) |
429 | nand_writel(info, NDECCCTRL, 0x0); | |
430 | } | |
cd9d1182 EG |
431 | |
432 | if (info->use_dma) | |
433 | ndcr |= NDCR_DMA_EN; | |
434 | else | |
435 | ndcr &= ~NDCR_DMA_EN; | |
436 | ||
5bb653e8 EG |
437 | if (info->use_spare) |
438 | ndcr |= NDCR_SPARE_EN; | |
439 | else | |
440 | ndcr &= ~NDCR_SPARE_EN; | |
441 | ||
f8155a40 LW |
442 | ndcr |= NDCR_ND_RUN; |
443 | ||
444 | /* clear status bits and run */ | |
f8155a40 | 445 | nand_writel(info, NDSR, NDSR_MASK); |
0b14392d | 446 | nand_writel(info, NDCR, 0); |
f8155a40 LW |
447 | nand_writel(info, NDCR, ndcr); |
448 | } | |
449 | ||
450 | static void pxa3xx_nand_stop(struct pxa3xx_nand_info *info) | |
451 | { | |
452 | uint32_t ndcr; | |
453 | int timeout = NAND_STOP_DELAY; | |
454 | ||
455 | /* wait RUN bit in NDCR become 0 */ | |
456 | ndcr = nand_readl(info, NDCR); | |
457 | while ((ndcr & NDCR_ND_RUN) && (timeout-- > 0)) { | |
458 | ndcr = nand_readl(info, NDCR); | |
459 | udelay(1); | |
460 | } | |
461 | ||
462 | if (timeout <= 0) { | |
463 | ndcr &= ~NDCR_ND_RUN; | |
464 | nand_writel(info, NDCR, ndcr); | |
465 | } | |
466 | /* clear status bits */ | |
467 | nand_writel(info, NDSR, NDSR_MASK); | |
468 | } | |
469 | ||
57ff88f0 EG |
470 | static void __maybe_unused |
471 | enable_int(struct pxa3xx_nand_info *info, uint32_t int_mask) | |
fe69af00 | 472 | { |
473 | uint32_t ndcr; | |
474 | ||
475 | ndcr = nand_readl(info, NDCR); | |
476 | nand_writel(info, NDCR, ndcr & ~int_mask); | |
477 | } | |
478 | ||
479 | static void disable_int(struct pxa3xx_nand_info *info, uint32_t int_mask) | |
480 | { | |
481 | uint32_t ndcr; | |
482 | ||
483 | ndcr = nand_readl(info, NDCR); | |
484 | nand_writel(info, NDCR, ndcr | int_mask); | |
485 | } | |
486 | ||
8dad0386 MR |
487 | static void drain_fifo(struct pxa3xx_nand_info *info, void *data, int len) |
488 | { | |
489 | if (info->ecc_bch) { | |
afca11ec MR |
490 | u32 val; |
491 | int ret; | |
8dad0386 MR |
492 | |
493 | /* | |
494 | * According to the datasheet, when reading from NDDB | |
495 | * with BCH enabled, after each 32 bytes reads, we | |
496 | * have to make sure that the NDSR.RDDREQ bit is set. | |
497 | * | |
498 | * Drain the FIFO 8 32 bits reads at a time, and skip | |
499 | * the polling on the last read. | |
500 | */ | |
501 | while (len > 8) { | |
ce914e6b | 502 | readsl(info->mmio_base + NDDB, data, 8); |
8dad0386 | 503 | |
afca11ec MR |
504 | ret = readl_relaxed_poll_timeout(info->mmio_base + NDSR, val, |
505 | val & NDSR_RDDREQ, 1000, 5000); | |
506 | if (ret) { | |
507 | dev_err(&info->pdev->dev, | |
508 | "Timeout on RDDREQ while draining the FIFO\n"); | |
509 | return; | |
8dad0386 MR |
510 | } |
511 | ||
512 | data += 32; | |
513 | len -= 8; | |
514 | } | |
515 | } | |
516 | ||
ce914e6b | 517 | readsl(info->mmio_base + NDDB, data, len); |
8dad0386 MR |
518 | } |
519 | ||
f8155a40 | 520 | static void handle_data_pio(struct pxa3xx_nand_info *info) |
fe69af00 | 521 | { |
70ed8523 | 522 | unsigned int do_bytes = min(info->data_size, info->chunk_size); |
fa543bef | 523 | |
fe69af00 | 524 | switch (info->state) { |
525 | case STATE_PIO_WRITING: | |
ce914e6b RH |
526 | writesl(info->mmio_base + NDDB, |
527 | info->data_buff + info->data_buff_pos, | |
528 | DIV_ROUND_UP(do_bytes, 4)); | |
fa543bef | 529 | |
9d8b1043 | 530 | if (info->oob_size > 0) |
ce914e6b RH |
531 | writesl(info->mmio_base + NDDB, |
532 | info->oob_buff + info->oob_buff_pos, | |
533 | DIV_ROUND_UP(info->oob_size, 4)); | |
fe69af00 | 534 | break; |
535 | case STATE_PIO_READING: | |
8dad0386 MR |
536 | drain_fifo(info, |
537 | info->data_buff + info->data_buff_pos, | |
538 | DIV_ROUND_UP(do_bytes, 4)); | |
fa543bef | 539 | |
9d8b1043 | 540 | if (info->oob_size > 0) |
8dad0386 MR |
541 | drain_fifo(info, |
542 | info->oob_buff + info->oob_buff_pos, | |
543 | DIV_ROUND_UP(info->oob_size, 4)); | |
fe69af00 | 544 | break; |
545 | default: | |
da675b4e | 546 | dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__, |
fe69af00 | 547 | info->state); |
f8155a40 | 548 | BUG(); |
fe69af00 | 549 | } |
fa543bef EG |
550 | |
551 | /* Update buffer pointers for multi-page read/write */ | |
552 | info->data_buff_pos += do_bytes; | |
553 | info->oob_buff_pos += info->oob_size; | |
554 | info->data_size -= do_bytes; | |
fe69af00 | 555 | } |
556 | ||
f4db2e3a | 557 | #ifdef ARCH_HAS_DMA |
f8155a40 | 558 | static void start_data_dma(struct pxa3xx_nand_info *info) |
fe69af00 | 559 | { |
560 | struct pxa_dma_desc *desc = info->data_desc; | |
9d8b1043 | 561 | int dma_len = ALIGN(info->data_size + info->oob_size, 32); |
fe69af00 | 562 | |
563 | desc->ddadr = DDADR_STOP; | |
564 | desc->dcmd = DCMD_ENDIRQEN | DCMD_WIDTH4 | DCMD_BURST32 | dma_len; | |
565 | ||
f8155a40 LW |
566 | switch (info->state) { |
567 | case STATE_DMA_WRITING: | |
fe69af00 | 568 | desc->dsadr = info->data_buff_phys; |
8638fac8 | 569 | desc->dtadr = info->mmio_phys + NDDB; |
fe69af00 | 570 | desc->dcmd |= DCMD_INCSRCADDR | DCMD_FLOWTRG; |
f8155a40 LW |
571 | break; |
572 | case STATE_DMA_READING: | |
fe69af00 | 573 | desc->dtadr = info->data_buff_phys; |
8638fac8 | 574 | desc->dsadr = info->mmio_phys + NDDB; |
fe69af00 | 575 | desc->dcmd |= DCMD_INCTRGADDR | DCMD_FLOWSRC; |
f8155a40 LW |
576 | break; |
577 | default: | |
da675b4e | 578 | dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__, |
f8155a40 LW |
579 | info->state); |
580 | BUG(); | |
fe69af00 | 581 | } |
582 | ||
583 | DRCMR(info->drcmr_dat) = DRCMR_MAPVLD | info->data_dma_ch; | |
584 | DDADR(info->data_dma_ch) = info->data_desc_addr; | |
585 | DCSR(info->data_dma_ch) |= DCSR_RUN; | |
586 | } | |
587 | ||
588 | static void pxa3xx_nand_data_dma_irq(int channel, void *data) | |
589 | { | |
590 | struct pxa3xx_nand_info *info = data; | |
591 | uint32_t dcsr; | |
592 | ||
593 | dcsr = DCSR(channel); | |
594 | DCSR(channel) = dcsr; | |
595 | ||
596 | if (dcsr & DCSR_BUSERR) { | |
597 | info->retcode = ERR_DMABUSERR; | |
fe69af00 | 598 | } |
599 | ||
f8155a40 LW |
600 | info->state = STATE_DMA_DONE; |
601 | enable_int(info, NDCR_INT_MASK); | |
602 | nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ); | |
fe69af00 | 603 | } |
f4db2e3a EG |
604 | #else |
605 | static void start_data_dma(struct pxa3xx_nand_info *info) | |
606 | {} | |
607 | #endif | |
fe69af00 | 608 | |
24542257 RJ |
609 | static irqreturn_t pxa3xx_nand_irq_thread(int irq, void *data) |
610 | { | |
611 | struct pxa3xx_nand_info *info = data; | |
612 | ||
613 | handle_data_pio(info); | |
614 | ||
615 | info->state = STATE_CMD_DONE; | |
616 | nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ); | |
617 | ||
618 | return IRQ_HANDLED; | |
619 | } | |
620 | ||
fe69af00 | 621 | static irqreturn_t pxa3xx_nand_irq(int irq, void *devid) |
622 | { | |
623 | struct pxa3xx_nand_info *info = devid; | |
55d9fd6e | 624 | unsigned int status, is_completed = 0, is_ready = 0; |
f3c8cfc2 | 625 | unsigned int ready, cmd_done; |
24542257 | 626 | irqreturn_t ret = IRQ_HANDLED; |
f3c8cfc2 LW |
627 | |
628 | if (info->cs == 0) { | |
629 | ready = NDSR_FLASH_RDY; | |
630 | cmd_done = NDSR_CS0_CMDD; | |
631 | } else { | |
632 | ready = NDSR_RDY; | |
633 | cmd_done = NDSR_CS1_CMDD; | |
634 | } | |
fe69af00 | 635 | |
636 | status = nand_readl(info, NDSR); | |
637 | ||
87f5336e EG |
638 | if (status & NDSR_UNCORERR) |
639 | info->retcode = ERR_UNCORERR; | |
640 | if (status & NDSR_CORERR) { | |
641 | info->retcode = ERR_CORERR; | |
642 | if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370 && | |
643 | info->ecc_bch) | |
644 | info->ecc_err_cnt = NDSR_ERR_CNT(status); | |
645 | else | |
646 | info->ecc_err_cnt = 1; | |
647 | ||
648 | /* | |
649 | * Each chunk composing a page is corrected independently, | |
650 | * and we need to store maximum number of corrected bitflips | |
651 | * to return it to the MTD layer in ecc.read_page(). | |
652 | */ | |
653 | info->max_bitflips = max_t(unsigned int, | |
654 | info->max_bitflips, | |
655 | info->ecc_err_cnt); | |
656 | } | |
f8155a40 LW |
657 | if (status & (NDSR_RDDREQ | NDSR_WRDREQ)) { |
658 | /* whether use dma to transfer data */ | |
fe69af00 | 659 | if (info->use_dma) { |
f8155a40 LW |
660 | disable_int(info, NDCR_INT_MASK); |
661 | info->state = (status & NDSR_RDDREQ) ? | |
662 | STATE_DMA_READING : STATE_DMA_WRITING; | |
663 | start_data_dma(info); | |
664 | goto NORMAL_IRQ_EXIT; | |
fe69af00 | 665 | } else { |
f8155a40 LW |
666 | info->state = (status & NDSR_RDDREQ) ? |
667 | STATE_PIO_READING : STATE_PIO_WRITING; | |
24542257 RJ |
668 | ret = IRQ_WAKE_THREAD; |
669 | goto NORMAL_IRQ_EXIT; | |
fe69af00 | 670 | } |
fe69af00 | 671 | } |
f3c8cfc2 | 672 | if (status & cmd_done) { |
f8155a40 LW |
673 | info->state = STATE_CMD_DONE; |
674 | is_completed = 1; | |
fe69af00 | 675 | } |
f3c8cfc2 | 676 | if (status & ready) { |
f8155a40 | 677 | info->state = STATE_READY; |
55d9fd6e | 678 | is_ready = 1; |
401e67e2 | 679 | } |
fe69af00 | 680 | |
f8155a40 LW |
681 | if (status & NDSR_WRCMDREQ) { |
682 | nand_writel(info, NDSR, NDSR_WRCMDREQ); | |
683 | status &= ~NDSR_WRCMDREQ; | |
684 | info->state = STATE_CMD_HANDLE; | |
3a1a344a EG |
685 | |
686 | /* | |
687 | * Command buffer registers NDCB{0-2} (and optionally NDCB3) | |
688 | * must be loaded by writing directly either 12 or 16 | |
689 | * bytes directly to NDCB0, four bytes at a time. | |
690 | * | |
691 | * Direct write access to NDCB1, NDCB2 and NDCB3 is ignored | |
692 | * but each NDCBx register can be read. | |
693 | */ | |
f8155a40 LW |
694 | nand_writel(info, NDCB0, info->ndcb0); |
695 | nand_writel(info, NDCB0, info->ndcb1); | |
696 | nand_writel(info, NDCB0, info->ndcb2); | |
3a1a344a EG |
697 | |
698 | /* NDCB3 register is available in NFCv2 (Armada 370/XP SoC) */ | |
699 | if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370) | |
700 | nand_writel(info, NDCB0, info->ndcb3); | |
fe69af00 | 701 | } |
702 | ||
f8155a40 LW |
703 | /* clear NDSR to let the controller exit the IRQ */ |
704 | nand_writel(info, NDSR, status); | |
705 | if (is_completed) | |
706 | complete(&info->cmd_complete); | |
55d9fd6e EG |
707 | if (is_ready) |
708 | complete(&info->dev_ready); | |
f8155a40 | 709 | NORMAL_IRQ_EXIT: |
24542257 | 710 | return ret; |
fe69af00 | 711 | } |
712 | ||
fe69af00 | 713 | static inline int is_buf_blank(uint8_t *buf, size_t len) |
714 | { | |
715 | for (; len > 0; len--) | |
716 | if (*buf++ != 0xff) | |
717 | return 0; | |
718 | return 1; | |
719 | } | |
720 | ||
86beebae EG |
721 | static void set_command_address(struct pxa3xx_nand_info *info, |
722 | unsigned int page_size, uint16_t column, int page_addr) | |
723 | { | |
724 | /* small page addr setting */ | |
725 | if (page_size < PAGE_CHUNK_SIZE) { | |
726 | info->ndcb1 = ((page_addr & 0xFFFFFF) << 8) | |
727 | | (column & 0xFF); | |
728 | ||
729 | info->ndcb2 = 0; | |
730 | } else { | |
731 | info->ndcb1 = ((page_addr & 0xFFFF) << 16) | |
732 | | (column & 0xFFFF); | |
733 | ||
734 | if (page_addr & 0xFF0000) | |
735 | info->ndcb2 = (page_addr & 0xFF0000) >> 16; | |
736 | else | |
737 | info->ndcb2 = 0; | |
738 | } | |
739 | } | |
740 | ||
c39ff03a | 741 | static void prepare_start_command(struct pxa3xx_nand_info *info, int command) |
fe69af00 | 742 | { |
39f83d15 EG |
743 | struct pxa3xx_nand_host *host = info->host[info->cs]; |
744 | struct mtd_info *mtd = host->mtd; | |
745 | ||
4eb2da89 | 746 | /* reset data and oob column point to handle data */ |
401e67e2 LW |
747 | info->buf_start = 0; |
748 | info->buf_count = 0; | |
4eb2da89 | 749 | info->oob_size = 0; |
fa543bef EG |
750 | info->data_buff_pos = 0; |
751 | info->oob_buff_pos = 0; | |
4eb2da89 | 752 | info->use_ecc = 0; |
5bb653e8 | 753 | info->use_spare = 1; |
4eb2da89 | 754 | info->retcode = ERR_NONE; |
87f5336e | 755 | info->ecc_err_cnt = 0; |
f0e6a32e | 756 | info->ndcb3 = 0; |
d20d0a6c | 757 | info->need_wait = 0; |
fe69af00 | 758 | |
759 | switch (command) { | |
4eb2da89 LW |
760 | case NAND_CMD_READ0: |
761 | case NAND_CMD_PAGEPROG: | |
762 | info->use_ecc = 1; | |
fe69af00 | 763 | case NAND_CMD_READOOB: |
fa543bef | 764 | pxa3xx_set_datasize(info, mtd); |
fe69af00 | 765 | break; |
41a63430 EG |
766 | case NAND_CMD_PARAM: |
767 | info->use_spare = 0; | |
768 | break; | |
4eb2da89 LW |
769 | default: |
770 | info->ndcb1 = 0; | |
771 | info->ndcb2 = 0; | |
772 | break; | |
773 | } | |
39f83d15 EG |
774 | |
775 | /* | |
776 | * If we are about to issue a read command, or about to set | |
777 | * the write address, then clean the data buffer. | |
778 | */ | |
779 | if (command == NAND_CMD_READ0 || | |
780 | command == NAND_CMD_READOOB || | |
781 | command == NAND_CMD_SEQIN) { | |
782 | ||
783 | info->buf_count = mtd->writesize + mtd->oobsize; | |
784 | memset(info->data_buff, 0xFF, info->buf_count); | |
785 | } | |
786 | ||
c39ff03a EG |
787 | } |
788 | ||
789 | static int prepare_set_command(struct pxa3xx_nand_info *info, int command, | |
70ed8523 | 790 | int ext_cmd_type, uint16_t column, int page_addr) |
c39ff03a EG |
791 | { |
792 | int addr_cycle, exec_cmd; | |
793 | struct pxa3xx_nand_host *host; | |
794 | struct mtd_info *mtd; | |
795 | ||
796 | host = info->host[info->cs]; | |
797 | mtd = host->mtd; | |
798 | addr_cycle = 0; | |
799 | exec_cmd = 1; | |
800 | ||
801 | if (info->cs != 0) | |
802 | info->ndcb0 = NDCB0_CSEL; | |
803 | else | |
804 | info->ndcb0 = 0; | |
805 | ||
806 | if (command == NAND_CMD_SEQIN) | |
807 | exec_cmd = 0; | |
4eb2da89 | 808 | |
d456882b LW |
809 | addr_cycle = NDCB0_ADDR_CYC(host->row_addr_cycles |
810 | + host->col_addr_cycles); | |
fe69af00 | 811 | |
4eb2da89 LW |
812 | switch (command) { |
813 | case NAND_CMD_READOOB: | |
fe69af00 | 814 | case NAND_CMD_READ0: |
ec82135a EG |
815 | info->buf_start = column; |
816 | info->ndcb0 |= NDCB0_CMD_TYPE(0) | |
817 | | addr_cycle | |
818 | | NAND_CMD_READ0; | |
819 | ||
4eb2da89 | 820 | if (command == NAND_CMD_READOOB) |
ec82135a | 821 | info->buf_start += mtd->writesize; |
4eb2da89 | 822 | |
70ed8523 EG |
823 | /* |
824 | * Multiple page read needs an 'extended command type' field, | |
825 | * which is either naked-read or last-read according to the | |
826 | * state. | |
827 | */ | |
828 | if (mtd->writesize == PAGE_CHUNK_SIZE) { | |
ec82135a | 829 | info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8); |
70ed8523 EG |
830 | } else if (mtd->writesize > PAGE_CHUNK_SIZE) { |
831 | info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8) | |
832 | | NDCB0_LEN_OVRD | |
833 | | NDCB0_EXT_CMD_TYPE(ext_cmd_type); | |
834 | info->ndcb3 = info->chunk_size + | |
835 | info->oob_size; | |
836 | } | |
fe69af00 | 837 | |
01d9947e | 838 | set_command_address(info, mtd->writesize, column, page_addr); |
01d9947e EG |
839 | break; |
840 | ||
fe69af00 | 841 | case NAND_CMD_SEQIN: |
4eb2da89 | 842 | |
e7f9a6a4 EG |
843 | info->buf_start = column; |
844 | set_command_address(info, mtd->writesize, 0, page_addr); | |
535cb57a EG |
845 | |
846 | /* | |
847 | * Multiple page programming needs to execute the initial | |
848 | * SEQIN command that sets the page address. | |
849 | */ | |
850 | if (mtd->writesize > PAGE_CHUNK_SIZE) { | |
851 | info->ndcb0 |= NDCB0_CMD_TYPE(0x1) | |
852 | | NDCB0_EXT_CMD_TYPE(ext_cmd_type) | |
853 | | addr_cycle | |
854 | | command; | |
855 | /* No data transfer in this case */ | |
856 | info->data_size = 0; | |
857 | exec_cmd = 1; | |
858 | } | |
fe69af00 | 859 | break; |
4eb2da89 | 860 | |
fe69af00 | 861 | case NAND_CMD_PAGEPROG: |
4eb2da89 LW |
862 | if (is_buf_blank(info->data_buff, |
863 | (mtd->writesize + mtd->oobsize))) { | |
864 | exec_cmd = 0; | |
865 | break; | |
866 | } | |
fe69af00 | 867 | |
535cb57a EG |
868 | /* Second command setting for large pages */ |
869 | if (mtd->writesize > PAGE_CHUNK_SIZE) { | |
870 | /* | |
871 | * Multiple page write uses the 'extended command' | |
872 | * field. This can be used to issue a command dispatch | |
873 | * or a naked-write depending on the current stage. | |
874 | */ | |
875 | info->ndcb0 |= NDCB0_CMD_TYPE(0x1) | |
876 | | NDCB0_LEN_OVRD | |
877 | | NDCB0_EXT_CMD_TYPE(ext_cmd_type); | |
878 | info->ndcb3 = info->chunk_size + | |
879 | info->oob_size; | |
880 | ||
881 | /* | |
882 | * This is the command dispatch that completes a chunked | |
883 | * page program operation. | |
884 | */ | |
885 | if (info->data_size == 0) { | |
886 | info->ndcb0 = NDCB0_CMD_TYPE(0x1) | |
887 | | NDCB0_EXT_CMD_TYPE(ext_cmd_type) | |
888 | | command; | |
889 | info->ndcb1 = 0; | |
890 | info->ndcb2 = 0; | |
891 | info->ndcb3 = 0; | |
892 | } | |
893 | } else { | |
894 | info->ndcb0 |= NDCB0_CMD_TYPE(0x1) | |
895 | | NDCB0_AUTO_RS | |
896 | | NDCB0_ST_ROW_EN | |
897 | | NDCB0_DBC | |
898 | | (NAND_CMD_PAGEPROG << 8) | |
899 | | NAND_CMD_SEQIN | |
900 | | addr_cycle; | |
901 | } | |
fe69af00 | 902 | break; |
4eb2da89 | 903 | |
ce0268f6 | 904 | case NAND_CMD_PARAM: |
c1634097 | 905 | info->buf_count = INIT_BUFFER_SIZE; |
ce0268f6 EG |
906 | info->ndcb0 |= NDCB0_CMD_TYPE(0) |
907 | | NDCB0_ADDR_CYC(1) | |
41a63430 | 908 | | NDCB0_LEN_OVRD |
ec82135a | 909 | | command; |
ce0268f6 | 910 | info->ndcb1 = (column & 0xFF); |
c1634097 EG |
911 | info->ndcb3 = INIT_BUFFER_SIZE; |
912 | info->data_size = INIT_BUFFER_SIZE; | |
ce0268f6 EG |
913 | break; |
914 | ||
fe69af00 | 915 | case NAND_CMD_READID: |
d456882b | 916 | info->buf_count = host->read_id_bytes; |
4eb2da89 LW |
917 | info->ndcb0 |= NDCB0_CMD_TYPE(3) |
918 | | NDCB0_ADDR_CYC(1) | |
ec82135a | 919 | | command; |
d14231f1 | 920 | info->ndcb1 = (column & 0xFF); |
4eb2da89 LW |
921 | |
922 | info->data_size = 8; | |
923 | break; | |
fe69af00 | 924 | case NAND_CMD_STATUS: |
4eb2da89 LW |
925 | info->buf_count = 1; |
926 | info->ndcb0 |= NDCB0_CMD_TYPE(4) | |
927 | | NDCB0_ADDR_CYC(1) | |
ec82135a | 928 | | command; |
4eb2da89 LW |
929 | |
930 | info->data_size = 8; | |
931 | break; | |
932 | ||
933 | case NAND_CMD_ERASE1: | |
4eb2da89 LW |
934 | info->ndcb0 |= NDCB0_CMD_TYPE(2) |
935 | | NDCB0_AUTO_RS | |
936 | | NDCB0_ADDR_CYC(3) | |
937 | | NDCB0_DBC | |
ec82135a EG |
938 | | (NAND_CMD_ERASE2 << 8) |
939 | | NAND_CMD_ERASE1; | |
4eb2da89 LW |
940 | info->ndcb1 = page_addr; |
941 | info->ndcb2 = 0; | |
942 | ||
fe69af00 | 943 | break; |
944 | case NAND_CMD_RESET: | |
4eb2da89 | 945 | info->ndcb0 |= NDCB0_CMD_TYPE(5) |
ec82135a | 946 | | command; |
4eb2da89 LW |
947 | |
948 | break; | |
949 | ||
950 | case NAND_CMD_ERASE2: | |
951 | exec_cmd = 0; | |
fe69af00 | 952 | break; |
4eb2da89 | 953 | |
fe69af00 | 954 | default: |
4eb2da89 | 955 | exec_cmd = 0; |
da675b4e LW |
956 | dev_err(&info->pdev->dev, "non-supported command %x\n", |
957 | command); | |
fe69af00 | 958 | break; |
959 | } | |
960 | ||
4eb2da89 LW |
961 | return exec_cmd; |
962 | } | |
963 | ||
5cbbdc6a EG |
964 | static void nand_cmdfunc(struct mtd_info *mtd, unsigned command, |
965 | int column, int page_addr) | |
4eb2da89 | 966 | { |
d456882b LW |
967 | struct pxa3xx_nand_host *host = mtd->priv; |
968 | struct pxa3xx_nand_info *info = host->info_data; | |
e5860c18 | 969 | int exec_cmd; |
4eb2da89 LW |
970 | |
971 | /* | |
972 | * if this is a x16 device ,then convert the input | |
973 | * "byte" address into a "word" address appropriate | |
974 | * for indexing a word-oriented device | |
975 | */ | |
48cf7efa | 976 | if (info->reg_ndcr & NDCR_DWIDTH_M) |
4eb2da89 LW |
977 | column /= 2; |
978 | ||
f3c8cfc2 LW |
979 | /* |
980 | * There may be different NAND chip hooked to | |
981 | * different chip select, so check whether | |
982 | * chip select has been changed, if yes, reset the timing | |
983 | */ | |
984 | if (info->cs != host->cs) { | |
985 | info->cs = host->cs; | |
48cf7efa EG |
986 | nand_writel(info, NDTR0CS0, info->ndtr0cs0); |
987 | nand_writel(info, NDTR1CS0, info->ndtr1cs0); | |
f3c8cfc2 LW |
988 | } |
989 | ||
c39ff03a EG |
990 | prepare_start_command(info, command); |
991 | ||
d456882b | 992 | info->state = STATE_PREPARED; |
70ed8523 EG |
993 | exec_cmd = prepare_set_command(info, command, 0, column, page_addr); |
994 | ||
f8155a40 LW |
995 | if (exec_cmd) { |
996 | init_completion(&info->cmd_complete); | |
55d9fd6e EG |
997 | init_completion(&info->dev_ready); |
998 | info->need_wait = 1; | |
f8155a40 LW |
999 | pxa3xx_nand_start(info); |
1000 | ||
e5860c18 NMG |
1001 | if (!wait_for_completion_timeout(&info->cmd_complete, |
1002 | CHIP_DELAY_TIMEOUT)) { | |
da675b4e | 1003 | dev_err(&info->pdev->dev, "Wait time out!!!\n"); |
f8155a40 LW |
1004 | /* Stop State Machine for next command cycle */ |
1005 | pxa3xx_nand_stop(info); | |
1006 | } | |
f8155a40 | 1007 | } |
d456882b | 1008 | info->state = STATE_IDLE; |
f8155a40 LW |
1009 | } |
1010 | ||
5cbbdc6a EG |
1011 | static void nand_cmdfunc_extended(struct mtd_info *mtd, |
1012 | const unsigned command, | |
1013 | int column, int page_addr) | |
70ed8523 EG |
1014 | { |
1015 | struct pxa3xx_nand_host *host = mtd->priv; | |
1016 | struct pxa3xx_nand_info *info = host->info_data; | |
e5860c18 | 1017 | int exec_cmd, ext_cmd_type; |
70ed8523 EG |
1018 | |
1019 | /* | |
1020 | * if this is a x16 device then convert the input | |
1021 | * "byte" address into a "word" address appropriate | |
1022 | * for indexing a word-oriented device | |
1023 | */ | |
1024 | if (info->reg_ndcr & NDCR_DWIDTH_M) | |
1025 | column /= 2; | |
1026 | ||
1027 | /* | |
1028 | * There may be different NAND chip hooked to | |
1029 | * different chip select, so check whether | |
1030 | * chip select has been changed, if yes, reset the timing | |
1031 | */ | |
1032 | if (info->cs != host->cs) { | |
1033 | info->cs = host->cs; | |
1034 | nand_writel(info, NDTR0CS0, info->ndtr0cs0); | |
1035 | nand_writel(info, NDTR1CS0, info->ndtr1cs0); | |
1036 | } | |
1037 | ||
1038 | /* Select the extended command for the first command */ | |
1039 | switch (command) { | |
1040 | case NAND_CMD_READ0: | |
1041 | case NAND_CMD_READOOB: | |
1042 | ext_cmd_type = EXT_CMD_TYPE_MONO; | |
1043 | break; | |
535cb57a EG |
1044 | case NAND_CMD_SEQIN: |
1045 | ext_cmd_type = EXT_CMD_TYPE_DISPATCH; | |
1046 | break; | |
1047 | case NAND_CMD_PAGEPROG: | |
1048 | ext_cmd_type = EXT_CMD_TYPE_NAKED_RW; | |
1049 | break; | |
70ed8523 EG |
1050 | default: |
1051 | ext_cmd_type = 0; | |
535cb57a | 1052 | break; |
70ed8523 EG |
1053 | } |
1054 | ||
1055 | prepare_start_command(info, command); | |
1056 | ||
1057 | /* | |
1058 | * Prepare the "is ready" completion before starting a command | |
1059 | * transaction sequence. If the command is not executed the | |
1060 | * completion will be completed, see below. | |
1061 | * | |
1062 | * We can do that inside the loop because the command variable | |
1063 | * is invariant and thus so is the exec_cmd. | |
1064 | */ | |
1065 | info->need_wait = 1; | |
1066 | init_completion(&info->dev_ready); | |
1067 | do { | |
1068 | info->state = STATE_PREPARED; | |
1069 | exec_cmd = prepare_set_command(info, command, ext_cmd_type, | |
1070 | column, page_addr); | |
1071 | if (!exec_cmd) { | |
1072 | info->need_wait = 0; | |
1073 | complete(&info->dev_ready); | |
1074 | break; | |
1075 | } | |
1076 | ||
1077 | init_completion(&info->cmd_complete); | |
1078 | pxa3xx_nand_start(info); | |
1079 | ||
e5860c18 NMG |
1080 | if (!wait_for_completion_timeout(&info->cmd_complete, |
1081 | CHIP_DELAY_TIMEOUT)) { | |
70ed8523 EG |
1082 | dev_err(&info->pdev->dev, "Wait time out!!!\n"); |
1083 | /* Stop State Machine for next command cycle */ | |
1084 | pxa3xx_nand_stop(info); | |
1085 | break; | |
1086 | } | |
1087 | ||
1088 | /* Check if the sequence is complete */ | |
535cb57a EG |
1089 | if (info->data_size == 0 && command != NAND_CMD_PAGEPROG) |
1090 | break; | |
1091 | ||
1092 | /* | |
1093 | * After a splitted program command sequence has issued | |
1094 | * the command dispatch, the command sequence is complete. | |
1095 | */ | |
1096 | if (info->data_size == 0 && | |
1097 | command == NAND_CMD_PAGEPROG && | |
1098 | ext_cmd_type == EXT_CMD_TYPE_DISPATCH) | |
70ed8523 EG |
1099 | break; |
1100 | ||
1101 | if (command == NAND_CMD_READ0 || command == NAND_CMD_READOOB) { | |
1102 | /* Last read: issue a 'last naked read' */ | |
1103 | if (info->data_size == info->chunk_size) | |
1104 | ext_cmd_type = EXT_CMD_TYPE_LAST_RW; | |
1105 | else | |
1106 | ext_cmd_type = EXT_CMD_TYPE_NAKED_RW; | |
535cb57a EG |
1107 | |
1108 | /* | |
1109 | * If a splitted program command has no more data to transfer, | |
1110 | * the command dispatch must be issued to complete. | |
1111 | */ | |
1112 | } else if (command == NAND_CMD_PAGEPROG && | |
1113 | info->data_size == 0) { | |
1114 | ext_cmd_type = EXT_CMD_TYPE_DISPATCH; | |
70ed8523 EG |
1115 | } |
1116 | } while (1); | |
1117 | ||
1118 | info->state = STATE_IDLE; | |
1119 | } | |
1120 | ||
fdbad98d | 1121 | static int pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd, |
1fbb938d | 1122 | struct nand_chip *chip, const uint8_t *buf, int oob_required) |
f8155a40 LW |
1123 | { |
1124 | chip->write_buf(mtd, buf, mtd->writesize); | |
1125 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); | |
fdbad98d JW |
1126 | |
1127 | return 0; | |
f8155a40 LW |
1128 | } |
1129 | ||
1130 | static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd, | |
1fbb938d BN |
1131 | struct nand_chip *chip, uint8_t *buf, int oob_required, |
1132 | int page) | |
f8155a40 | 1133 | { |
d456882b LW |
1134 | struct pxa3xx_nand_host *host = mtd->priv; |
1135 | struct pxa3xx_nand_info *info = host->info_data; | |
f8155a40 LW |
1136 | |
1137 | chip->read_buf(mtd, buf, mtd->writesize); | |
1138 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); | |
1139 | ||
87f5336e EG |
1140 | if (info->retcode == ERR_CORERR && info->use_ecc) { |
1141 | mtd->ecc_stats.corrected += info->ecc_err_cnt; | |
1142 | ||
1143 | } else if (info->retcode == ERR_UNCORERR) { | |
f8155a40 LW |
1144 | /* |
1145 | * for blank page (all 0xff), HW will calculate its ECC as | |
1146 | * 0, which is different from the ECC information within | |
87f5336e | 1147 | * OOB, ignore such uncorrectable errors |
f8155a40 LW |
1148 | */ |
1149 | if (is_buf_blank(buf, mtd->writesize)) | |
543e32d5 DM |
1150 | info->retcode = ERR_NONE; |
1151 | else | |
f8155a40 | 1152 | mtd->ecc_stats.failed++; |
fe69af00 | 1153 | } |
f8155a40 | 1154 | |
87f5336e | 1155 | return info->max_bitflips; |
fe69af00 | 1156 | } |
1157 | ||
1158 | static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd) | |
1159 | { | |
d456882b LW |
1160 | struct pxa3xx_nand_host *host = mtd->priv; |
1161 | struct pxa3xx_nand_info *info = host->info_data; | |
fe69af00 | 1162 | char retval = 0xFF; |
1163 | ||
1164 | if (info->buf_start < info->buf_count) | |
1165 | /* Has just send a new command? */ | |
1166 | retval = info->data_buff[info->buf_start++]; | |
1167 | ||
1168 | return retval; | |
1169 | } | |
1170 | ||
1171 | static u16 pxa3xx_nand_read_word(struct mtd_info *mtd) | |
1172 | { | |
d456882b LW |
1173 | struct pxa3xx_nand_host *host = mtd->priv; |
1174 | struct pxa3xx_nand_info *info = host->info_data; | |
fe69af00 | 1175 | u16 retval = 0xFFFF; |
1176 | ||
1177 | if (!(info->buf_start & 0x01) && info->buf_start < info->buf_count) { | |
1178 | retval = *((u16 *)(info->data_buff+info->buf_start)); | |
1179 | info->buf_start += 2; | |
1180 | } | |
1181 | return retval; | |
1182 | } | |
1183 | ||
1184 | static void pxa3xx_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) | |
1185 | { | |
d456882b LW |
1186 | struct pxa3xx_nand_host *host = mtd->priv; |
1187 | struct pxa3xx_nand_info *info = host->info_data; | |
fe69af00 | 1188 | int real_len = min_t(size_t, len, info->buf_count - info->buf_start); |
1189 | ||
1190 | memcpy(buf, info->data_buff + info->buf_start, real_len); | |
1191 | info->buf_start += real_len; | |
1192 | } | |
1193 | ||
1194 | static void pxa3xx_nand_write_buf(struct mtd_info *mtd, | |
1195 | const uint8_t *buf, int len) | |
1196 | { | |
d456882b LW |
1197 | struct pxa3xx_nand_host *host = mtd->priv; |
1198 | struct pxa3xx_nand_info *info = host->info_data; | |
fe69af00 | 1199 | int real_len = min_t(size_t, len, info->buf_count - info->buf_start); |
1200 | ||
1201 | memcpy(info->data_buff + info->buf_start, buf, real_len); | |
1202 | info->buf_start += real_len; | |
1203 | } | |
1204 | ||
fe69af00 | 1205 | static void pxa3xx_nand_select_chip(struct mtd_info *mtd, int chip) |
1206 | { | |
1207 | return; | |
1208 | } | |
1209 | ||
1210 | static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this) | |
1211 | { | |
d456882b LW |
1212 | struct pxa3xx_nand_host *host = mtd->priv; |
1213 | struct pxa3xx_nand_info *info = host->info_data; | |
55d9fd6e EG |
1214 | |
1215 | if (info->need_wait) { | |
55d9fd6e | 1216 | info->need_wait = 0; |
e5860c18 NMG |
1217 | if (!wait_for_completion_timeout(&info->dev_ready, |
1218 | CHIP_DELAY_TIMEOUT)) { | |
55d9fd6e EG |
1219 | dev_err(&info->pdev->dev, "Ready time out!!!\n"); |
1220 | return NAND_STATUS_FAIL; | |
1221 | } | |
1222 | } | |
fe69af00 | 1223 | |
1224 | /* pxa3xx_nand_send_command has waited for command complete */ | |
1225 | if (this->state == FL_WRITING || this->state == FL_ERASING) { | |
1226 | if (info->retcode == ERR_NONE) | |
1227 | return 0; | |
55d9fd6e EG |
1228 | else |
1229 | return NAND_STATUS_FAIL; | |
fe69af00 | 1230 | } |
1231 | ||
55d9fd6e | 1232 | return NAND_STATUS_READY; |
fe69af00 | 1233 | } |
1234 | ||
fe69af00 | 1235 | static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, |
c8c17c88 | 1236 | const struct pxa3xx_nand_flash *f) |
fe69af00 | 1237 | { |
1238 | struct platform_device *pdev = info->pdev; | |
453810b7 | 1239 | struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev); |
f3c8cfc2 | 1240 | struct pxa3xx_nand_host *host = info->host[info->cs]; |
f8155a40 | 1241 | uint32_t ndcr = 0x0; /* enable all interrupts */ |
fe69af00 | 1242 | |
da675b4e LW |
1243 | if (f->page_size != 2048 && f->page_size != 512) { |
1244 | dev_err(&pdev->dev, "Current only support 2048 and 512 size\n"); | |
fe69af00 | 1245 | return -EINVAL; |
da675b4e | 1246 | } |
fe69af00 | 1247 | |
da675b4e LW |
1248 | if (f->flash_width != 16 && f->flash_width != 8) { |
1249 | dev_err(&pdev->dev, "Only support 8bit and 16 bit!\n"); | |
fe69af00 | 1250 | return -EINVAL; |
da675b4e | 1251 | } |
fe69af00 | 1252 | |
1253 | /* calculate flash information */ | |
d456882b | 1254 | host->read_id_bytes = (f->page_size == 2048) ? 4 : 2; |
fe69af00 | 1255 | |
1256 | /* calculate addressing information */ | |
d456882b | 1257 | host->col_addr_cycles = (f->page_size == 2048) ? 2 : 1; |
fe69af00 | 1258 | |
1259 | if (f->num_blocks * f->page_per_block > 65536) | |
d456882b | 1260 | host->row_addr_cycles = 3; |
fe69af00 | 1261 | else |
d456882b | 1262 | host->row_addr_cycles = 2; |
fe69af00 | 1263 | |
1264 | ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0; | |
d456882b | 1265 | ndcr |= (host->col_addr_cycles == 2) ? NDCR_RA_START : 0; |
fe69af00 | 1266 | ndcr |= (f->page_per_block == 64) ? NDCR_PG_PER_BLK : 0; |
1267 | ndcr |= (f->page_size == 2048) ? NDCR_PAGE_SZ : 0; | |
1268 | ndcr |= (f->flash_width == 16) ? NDCR_DWIDTH_M : 0; | |
1269 | ndcr |= (f->dfc_width == 16) ? NDCR_DWIDTH_C : 0; | |
1270 | ||
d456882b | 1271 | ndcr |= NDCR_RD_ID_CNT(host->read_id_bytes); |
fe69af00 | 1272 | ndcr |= NDCR_SPARE_EN; /* enable spare by default */ |
1273 | ||
48cf7efa | 1274 | info->reg_ndcr = ndcr; |
fe69af00 | 1275 | |
d456882b | 1276 | pxa3xx_nand_set_timing(host, f->timing); |
fe69af00 | 1277 | return 0; |
1278 | } | |
1279 | ||
f271049e MR |
1280 | static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info) |
1281 | { | |
f3c8cfc2 LW |
1282 | /* |
1283 | * We set 0 by hard coding here, for we don't support keep_config | |
1284 | * when there is more than one chip attached to the controller | |
1285 | */ | |
1286 | struct pxa3xx_nand_host *host = info->host[0]; | |
f271049e | 1287 | uint32_t ndcr = nand_readl(info, NDCR); |
f271049e | 1288 | |
d456882b | 1289 | if (ndcr & NDCR_PAGE_SZ) { |
2128b08c | 1290 | /* Controller's FIFO size */ |
70ed8523 | 1291 | info->chunk_size = 2048; |
d456882b LW |
1292 | host->read_id_bytes = 4; |
1293 | } else { | |
70ed8523 | 1294 | info->chunk_size = 512; |
d456882b LW |
1295 | host->read_id_bytes = 2; |
1296 | } | |
1297 | ||
70ed8523 | 1298 | /* Set an initial chunk size */ |
48cf7efa EG |
1299 | info->reg_ndcr = ndcr & ~NDCR_INT_MASK; |
1300 | info->ndtr0cs0 = nand_readl(info, NDTR0CS0); | |
1301 | info->ndtr1cs0 = nand_readl(info, NDTR1CS0); | |
f271049e MR |
1302 | return 0; |
1303 | } | |
1304 | ||
f4db2e3a | 1305 | #ifdef ARCH_HAS_DMA |
fe69af00 | 1306 | static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info) |
1307 | { | |
1308 | struct platform_device *pdev = info->pdev; | |
62e8b851 | 1309 | int data_desc_offset = info->buf_size - sizeof(struct pxa_dma_desc); |
fe69af00 | 1310 | |
1311 | if (use_dma == 0) { | |
62e8b851 | 1312 | info->data_buff = kmalloc(info->buf_size, GFP_KERNEL); |
fe69af00 | 1313 | if (info->data_buff == NULL) |
1314 | return -ENOMEM; | |
1315 | return 0; | |
1316 | } | |
1317 | ||
62e8b851 | 1318 | info->data_buff = dma_alloc_coherent(&pdev->dev, info->buf_size, |
fe69af00 | 1319 | &info->data_buff_phys, GFP_KERNEL); |
1320 | if (info->data_buff == NULL) { | |
1321 | dev_err(&pdev->dev, "failed to allocate dma buffer\n"); | |
1322 | return -ENOMEM; | |
1323 | } | |
1324 | ||
fe69af00 | 1325 | info->data_desc = (void *)info->data_buff + data_desc_offset; |
1326 | info->data_desc_addr = info->data_buff_phys + data_desc_offset; | |
1327 | ||
1328 | info->data_dma_ch = pxa_request_dma("nand-data", DMA_PRIO_LOW, | |
1329 | pxa3xx_nand_data_dma_irq, info); | |
1330 | if (info->data_dma_ch < 0) { | |
1331 | dev_err(&pdev->dev, "failed to request data dma\n"); | |
62e8b851 | 1332 | dma_free_coherent(&pdev->dev, info->buf_size, |
fe69af00 | 1333 | info->data_buff, info->data_buff_phys); |
1334 | return info->data_dma_ch; | |
1335 | } | |
1336 | ||
95b26563 EG |
1337 | /* |
1338 | * Now that DMA buffers are allocated we turn on | |
1339 | * DMA proper for I/O operations. | |
1340 | */ | |
1341 | info->use_dma = 1; | |
fe69af00 | 1342 | return 0; |
1343 | } | |
1344 | ||
498b6145 EG |
1345 | static void pxa3xx_nand_free_buff(struct pxa3xx_nand_info *info) |
1346 | { | |
1347 | struct platform_device *pdev = info->pdev; | |
15b540c7 | 1348 | if (info->use_dma) { |
498b6145 | 1349 | pxa_free_dma(info->data_dma_ch); |
62e8b851 | 1350 | dma_free_coherent(&pdev->dev, info->buf_size, |
498b6145 EG |
1351 | info->data_buff, info->data_buff_phys); |
1352 | } else { | |
1353 | kfree(info->data_buff); | |
1354 | } | |
1355 | } | |
f4db2e3a EG |
1356 | #else |
1357 | static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info) | |
1358 | { | |
62e8b851 | 1359 | info->data_buff = kmalloc(info->buf_size, GFP_KERNEL); |
f4db2e3a EG |
1360 | if (info->data_buff == NULL) |
1361 | return -ENOMEM; | |
1362 | return 0; | |
1363 | } | |
1364 | ||
1365 | static void pxa3xx_nand_free_buff(struct pxa3xx_nand_info *info) | |
1366 | { | |
1367 | kfree(info->data_buff); | |
1368 | } | |
1369 | #endif | |
498b6145 | 1370 | |
401e67e2 LW |
1371 | static int pxa3xx_nand_sensing(struct pxa3xx_nand_info *info) |
1372 | { | |
f3c8cfc2 | 1373 | struct mtd_info *mtd; |
2d79ab16 | 1374 | struct nand_chip *chip; |
d456882b | 1375 | int ret; |
2d79ab16 | 1376 | |
f3c8cfc2 | 1377 | mtd = info->host[info->cs]->mtd; |
2d79ab16 EG |
1378 | chip = mtd->priv; |
1379 | ||
401e67e2 | 1380 | /* use the common timing to make a try */ |
d456882b LW |
1381 | ret = pxa3xx_nand_config_flash(info, &builtin_flash_types[0]); |
1382 | if (ret) | |
1383 | return ret; | |
1384 | ||
2d79ab16 | 1385 | chip->cmdfunc(mtd, NAND_CMD_RESET, 0, 0); |
56704d85 EG |
1386 | ret = chip->waitfunc(mtd, chip); |
1387 | if (ret & NAND_STATUS_FAIL) | |
1388 | return -ENODEV; | |
d456882b | 1389 | |
56704d85 | 1390 | return 0; |
401e67e2 | 1391 | } |
fe69af00 | 1392 | |
43bcfd2b EG |
1393 | static int pxa_ecc_init(struct pxa3xx_nand_info *info, |
1394 | struct nand_ecc_ctrl *ecc, | |
30b2afc8 | 1395 | int strength, int ecc_stepsize, int page_size) |
43bcfd2b | 1396 | { |
30b2afc8 | 1397 | if (strength == 1 && ecc_stepsize == 512 && page_size == 2048) { |
70ed8523 | 1398 | info->chunk_size = 2048; |
43bcfd2b EG |
1399 | info->spare_size = 40; |
1400 | info->ecc_size = 24; | |
1401 | ecc->mode = NAND_ECC_HW; | |
1402 | ecc->size = 512; | |
1403 | ecc->strength = 1; | |
43bcfd2b | 1404 | |
30b2afc8 | 1405 | } else if (strength == 1 && ecc_stepsize == 512 && page_size == 512) { |
70ed8523 | 1406 | info->chunk_size = 512; |
43bcfd2b EG |
1407 | info->spare_size = 8; |
1408 | info->ecc_size = 8; | |
1409 | ecc->mode = NAND_ECC_HW; | |
1410 | ecc->size = 512; | |
1411 | ecc->strength = 1; | |
43bcfd2b | 1412 | |
6033a949 BN |
1413 | /* |
1414 | * Required ECC: 4-bit correction per 512 bytes | |
1415 | * Select: 16-bit correction per 2048 bytes | |
1416 | */ | |
3db227b6 RG |
1417 | } else if (strength == 4 && ecc_stepsize == 512 && page_size == 2048) { |
1418 | info->ecc_bch = 1; | |
1419 | info->chunk_size = 2048; | |
1420 | info->spare_size = 32; | |
1421 | info->ecc_size = 32; | |
1422 | ecc->mode = NAND_ECC_HW; | |
1423 | ecc->size = info->chunk_size; | |
1424 | ecc->layout = &ecc_layout_2KB_bch4bit; | |
1425 | ecc->strength = 16; | |
3db227b6 | 1426 | |
30b2afc8 | 1427 | } else if (strength == 4 && ecc_stepsize == 512 && page_size == 4096) { |
70ed8523 EG |
1428 | info->ecc_bch = 1; |
1429 | info->chunk_size = 2048; | |
1430 | info->spare_size = 32; | |
1431 | info->ecc_size = 32; | |
1432 | ecc->mode = NAND_ECC_HW; | |
1433 | ecc->size = info->chunk_size; | |
1434 | ecc->layout = &ecc_layout_4KB_bch4bit; | |
1435 | ecc->strength = 16; | |
70ed8523 | 1436 | |
6033a949 BN |
1437 | /* |
1438 | * Required ECC: 8-bit correction per 512 bytes | |
1439 | * Select: 16-bit correction per 1024 bytes | |
1440 | */ | |
1441 | } else if (strength == 8 && ecc_stepsize == 512 && page_size == 4096) { | |
70ed8523 EG |
1442 | info->ecc_bch = 1; |
1443 | info->chunk_size = 1024; | |
1444 | info->spare_size = 0; | |
1445 | info->ecc_size = 32; | |
1446 | ecc->mode = NAND_ECC_HW; | |
1447 | ecc->size = info->chunk_size; | |
1448 | ecc->layout = &ecc_layout_4KB_bch8bit; | |
1449 | ecc->strength = 16; | |
eee0166d EG |
1450 | } else { |
1451 | dev_err(&info->pdev->dev, | |
1452 | "ECC strength %d at page size %d is not supported\n", | |
1453 | strength, page_size); | |
1454 | return -ENODEV; | |
70ed8523 | 1455 | } |
eee0166d EG |
1456 | |
1457 | dev_info(&info->pdev->dev, "ECC strength %d, ECC step size %d\n", | |
1458 | ecc->strength, ecc->size); | |
43bcfd2b EG |
1459 | return 0; |
1460 | } | |
1461 | ||
401e67e2 | 1462 | static int pxa3xx_nand_scan(struct mtd_info *mtd) |
fe69af00 | 1463 | { |
d456882b LW |
1464 | struct pxa3xx_nand_host *host = mtd->priv; |
1465 | struct pxa3xx_nand_info *info = host->info_data; | |
401e67e2 | 1466 | struct platform_device *pdev = info->pdev; |
453810b7 | 1467 | struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev); |
0fab028b | 1468 | struct nand_flash_dev pxa3xx_flash_ids[2], *def = NULL; |
401e67e2 LW |
1469 | const struct pxa3xx_nand_flash *f = NULL; |
1470 | struct nand_chip *chip = mtd->priv; | |
1471 | uint32_t id = -1; | |
4332c116 | 1472 | uint64_t chipsize; |
401e67e2 | 1473 | int i, ret, num; |
30b2afc8 | 1474 | uint16_t ecc_strength, ecc_step; |
401e67e2 LW |
1475 | |
1476 | if (pdata->keep_config && !pxa3xx_nand_detect_config(info)) | |
4332c116 | 1477 | goto KEEP_CONFIG; |
401e67e2 | 1478 | |
bc3e00f0 AT |
1479 | /* Set a default chunk size */ |
1480 | info->chunk_size = 512; | |
1481 | ||
401e67e2 | 1482 | ret = pxa3xx_nand_sensing(info); |
d456882b | 1483 | if (ret) { |
f3c8cfc2 LW |
1484 | dev_info(&info->pdev->dev, "There is no chip on cs %d!\n", |
1485 | info->cs); | |
401e67e2 | 1486 | |
d456882b | 1487 | return ret; |
401e67e2 LW |
1488 | } |
1489 | ||
1490 | chip->cmdfunc(mtd, NAND_CMD_READID, 0, 0); | |
1491 | id = *((uint16_t *)(info->data_buff)); | |
1492 | if (id != 0) | |
da675b4e | 1493 | dev_info(&info->pdev->dev, "Detect a flash id %x\n", id); |
401e67e2 | 1494 | else { |
da675b4e LW |
1495 | dev_warn(&info->pdev->dev, |
1496 | "Read out ID 0, potential timing set wrong!!\n"); | |
401e67e2 LW |
1497 | |
1498 | return -EINVAL; | |
1499 | } | |
1500 | ||
1501 | num = ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1; | |
1502 | for (i = 0; i < num; i++) { | |
1503 | if (i < pdata->num_flash) | |
1504 | f = pdata->flash + i; | |
1505 | else | |
1506 | f = &builtin_flash_types[i - pdata->num_flash + 1]; | |
1507 | ||
1508 | /* find the chip in default list */ | |
4332c116 | 1509 | if (f->chip_id == id) |
401e67e2 | 1510 | break; |
401e67e2 LW |
1511 | } |
1512 | ||
4332c116 | 1513 | if (i >= (ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1)) { |
da675b4e | 1514 | dev_err(&info->pdev->dev, "ERROR!! flash not defined!!!\n"); |
401e67e2 LW |
1515 | |
1516 | return -EINVAL; | |
1517 | } | |
1518 | ||
d456882b LW |
1519 | ret = pxa3xx_nand_config_flash(info, f); |
1520 | if (ret) { | |
1521 | dev_err(&info->pdev->dev, "ERROR! Configure failed\n"); | |
1522 | return ret; | |
1523 | } | |
1524 | ||
7c2f7176 AT |
1525 | memset(pxa3xx_flash_ids, 0, sizeof(pxa3xx_flash_ids)); |
1526 | ||
4332c116 | 1527 | pxa3xx_flash_ids[0].name = f->name; |
68aa352d | 1528 | pxa3xx_flash_ids[0].dev_id = (f->chip_id >> 8) & 0xffff; |
4332c116 LW |
1529 | pxa3xx_flash_ids[0].pagesize = f->page_size; |
1530 | chipsize = (uint64_t)f->num_blocks * f->page_per_block * f->page_size; | |
1531 | pxa3xx_flash_ids[0].chipsize = chipsize >> 20; | |
1532 | pxa3xx_flash_ids[0].erasesize = f->page_size * f->page_per_block; | |
1533 | if (f->flash_width == 16) | |
1534 | pxa3xx_flash_ids[0].options = NAND_BUSWIDTH_16; | |
0fab028b LW |
1535 | pxa3xx_flash_ids[1].name = NULL; |
1536 | def = pxa3xx_flash_ids; | |
4332c116 | 1537 | KEEP_CONFIG: |
48cf7efa | 1538 | if (info->reg_ndcr & NDCR_DWIDTH_M) |
d456882b LW |
1539 | chip->options |= NAND_BUSWIDTH_16; |
1540 | ||
43bcfd2b EG |
1541 | /* Device detection must be done with ECC disabled */ |
1542 | if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370) | |
1543 | nand_writel(info, NDECCCTRL, 0x0); | |
1544 | ||
0fab028b | 1545 | if (nand_scan_ident(mtd, 1, def)) |
4332c116 | 1546 | return -ENODEV; |
776f265e EG |
1547 | |
1548 | if (pdata->flash_bbt) { | |
1549 | /* | |
1550 | * We'll use a bad block table stored in-flash and don't | |
1551 | * allow writing the bad block marker to the flash. | |
1552 | */ | |
1553 | chip->bbt_options |= NAND_BBT_USE_FLASH | | |
1554 | NAND_BBT_NO_OOB_BBM; | |
1555 | chip->bbt_td = &bbt_main_descr; | |
1556 | chip->bbt_md = &bbt_mirror_descr; | |
1557 | } | |
1558 | ||
5cbbdc6a EG |
1559 | /* |
1560 | * If the page size is bigger than the FIFO size, let's check | |
1561 | * we are given the right variant and then switch to the extended | |
1562 | * (aka splitted) command handling, | |
1563 | */ | |
1564 | if (mtd->writesize > PAGE_CHUNK_SIZE) { | |
1565 | if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370) { | |
1566 | chip->cmdfunc = nand_cmdfunc_extended; | |
1567 | } else { | |
1568 | dev_err(&info->pdev->dev, | |
1569 | "unsupported page size on this variant\n"); | |
1570 | return -ENODEV; | |
1571 | } | |
1572 | } | |
1573 | ||
5b3e5078 EG |
1574 | if (pdata->ecc_strength && pdata->ecc_step_size) { |
1575 | ecc_strength = pdata->ecc_strength; | |
1576 | ecc_step = pdata->ecc_step_size; | |
1577 | } else { | |
1578 | ecc_strength = chip->ecc_strength_ds; | |
1579 | ecc_step = chip->ecc_step_ds; | |
1580 | } | |
30b2afc8 EG |
1581 | |
1582 | /* Set default ECC strength requirements on non-ONFI devices */ | |
1583 | if (ecc_strength < 1 && ecc_step < 1) { | |
1584 | ecc_strength = 1; | |
1585 | ecc_step = 512; | |
1586 | } | |
1587 | ||
1588 | ret = pxa_ecc_init(info, &chip->ecc, ecc_strength, | |
1589 | ecc_step, mtd->writesize); | |
eee0166d EG |
1590 | if (ret) |
1591 | return ret; | |
43bcfd2b | 1592 | |
4332c116 | 1593 | /* calculate addressing information */ |
d456882b LW |
1594 | if (mtd->writesize >= 2048) |
1595 | host->col_addr_cycles = 2; | |
1596 | else | |
1597 | host->col_addr_cycles = 1; | |
1598 | ||
62e8b851 EG |
1599 | /* release the initial buffer */ |
1600 | kfree(info->data_buff); | |
1601 | ||
1602 | /* allocate the real data + oob buffer */ | |
1603 | info->buf_size = mtd->writesize + mtd->oobsize; | |
1604 | ret = pxa3xx_nand_init_buff(info); | |
1605 | if (ret) | |
1606 | return ret; | |
4332c116 | 1607 | info->oob_buff = info->data_buff + mtd->writesize; |
62e8b851 | 1608 | |
4332c116 | 1609 | if ((mtd->size >> chip->page_shift) > 65536) |
d456882b | 1610 | host->row_addr_cycles = 3; |
4332c116 | 1611 | else |
d456882b | 1612 | host->row_addr_cycles = 2; |
401e67e2 | 1613 | return nand_scan_tail(mtd); |
fe69af00 | 1614 | } |
1615 | ||
d456882b | 1616 | static int alloc_nand_resource(struct platform_device *pdev) |
fe69af00 | 1617 | { |
f3c8cfc2 | 1618 | struct pxa3xx_nand_platform_data *pdata; |
fe69af00 | 1619 | struct pxa3xx_nand_info *info; |
d456882b | 1620 | struct pxa3xx_nand_host *host; |
6e308f87 | 1621 | struct nand_chip *chip = NULL; |
fe69af00 | 1622 | struct mtd_info *mtd; |
1623 | struct resource *r; | |
f3c8cfc2 | 1624 | int ret, irq, cs; |
fe69af00 | 1625 | |
453810b7 | 1626 | pdata = dev_get_platdata(&pdev->dev); |
e423c90a RJ |
1627 | if (pdata->num_cs <= 0) |
1628 | return -ENODEV; | |
4c073cd2 EG |
1629 | info = devm_kzalloc(&pdev->dev, sizeof(*info) + (sizeof(*mtd) + |
1630 | sizeof(*host)) * pdata->num_cs, GFP_KERNEL); | |
1631 | if (!info) | |
d456882b | 1632 | return -ENOMEM; |
fe69af00 | 1633 | |
fe69af00 | 1634 | info->pdev = pdev; |
c7e9c7e7 | 1635 | info->variant = pxa3xx_nand_get_variant(pdev); |
f3c8cfc2 | 1636 | for (cs = 0; cs < pdata->num_cs; cs++) { |
ce914e6b | 1637 | mtd = (void *)&info[1] + (sizeof(*mtd) + sizeof(*host)) * cs; |
f3c8cfc2 LW |
1638 | chip = (struct nand_chip *)(&mtd[1]); |
1639 | host = (struct pxa3xx_nand_host *)chip; | |
1640 | info->host[cs] = host; | |
1641 | host->mtd = mtd; | |
1642 | host->cs = cs; | |
1643 | host->info_data = info; | |
1644 | mtd->priv = host; | |
1645 | mtd->owner = THIS_MODULE; | |
1646 | ||
1647 | chip->ecc.read_page = pxa3xx_nand_read_page_hwecc; | |
1648 | chip->ecc.write_page = pxa3xx_nand_write_page_hwecc; | |
1649 | chip->controller = &info->controller; | |
1650 | chip->waitfunc = pxa3xx_nand_waitfunc; | |
1651 | chip->select_chip = pxa3xx_nand_select_chip; | |
f3c8cfc2 LW |
1652 | chip->read_word = pxa3xx_nand_read_word; |
1653 | chip->read_byte = pxa3xx_nand_read_byte; | |
1654 | chip->read_buf = pxa3xx_nand_read_buf; | |
1655 | chip->write_buf = pxa3xx_nand_write_buf; | |
664c7f5e | 1656 | chip->options |= NAND_NO_SUBPAGE_WRITE; |
5cbbdc6a | 1657 | chip->cmdfunc = nand_cmdfunc; |
f3c8cfc2 | 1658 | } |
401e67e2 LW |
1659 | |
1660 | spin_lock_init(&chip->controller->lock); | |
1661 | init_waitqueue_head(&chip->controller->wq); | |
9ca7944d | 1662 | info->clk = devm_clk_get(&pdev->dev, NULL); |
fe69af00 | 1663 | if (IS_ERR(info->clk)) { |
1664 | dev_err(&pdev->dev, "failed to get nand clock\n"); | |
4c073cd2 | 1665 | return PTR_ERR(info->clk); |
fe69af00 | 1666 | } |
1f8eaff2 EG |
1667 | ret = clk_prepare_enable(info->clk); |
1668 | if (ret < 0) | |
1669 | return ret; | |
fe69af00 | 1670 | |
6b45c1ee EG |
1671 | if (use_dma) { |
1672 | /* | |
1673 | * This is a dirty hack to make this driver work from | |
1674 | * devicetree bindings. It can be removed once we have | |
1675 | * a prober DMA controller framework for DT. | |
1676 | */ | |
1677 | if (pdev->dev.of_node && | |
1678 | of_machine_is_compatible("marvell,pxa3xx")) { | |
1679 | info->drcmr_dat = 97; | |
1680 | info->drcmr_cmd = 99; | |
1681 | } else { | |
1682 | r = platform_get_resource(pdev, IORESOURCE_DMA, 0); | |
1683 | if (r == NULL) { | |
1684 | dev_err(&pdev->dev, | |
1685 | "no resource defined for data DMA\n"); | |
1686 | ret = -ENXIO; | |
1687 | goto fail_disable_clk; | |
1688 | } | |
1689 | info->drcmr_dat = r->start; | |
1690 | ||
1691 | r = platform_get_resource(pdev, IORESOURCE_DMA, 1); | |
1692 | if (r == NULL) { | |
1693 | dev_err(&pdev->dev, | |
1694 | "no resource defined for cmd DMA\n"); | |
1695 | ret = -ENXIO; | |
1696 | goto fail_disable_clk; | |
1697 | } | |
1698 | info->drcmr_cmd = r->start; | |
1e7ba630 | 1699 | } |
fe69af00 | 1700 | } |
fe69af00 | 1701 | |
1702 | irq = platform_get_irq(pdev, 0); | |
1703 | if (irq < 0) { | |
1704 | dev_err(&pdev->dev, "no IRQ resource defined\n"); | |
1705 | ret = -ENXIO; | |
9ca7944d | 1706 | goto fail_disable_clk; |
fe69af00 | 1707 | } |
1708 | ||
1709 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
0ddd846f EG |
1710 | info->mmio_base = devm_ioremap_resource(&pdev->dev, r); |
1711 | if (IS_ERR(info->mmio_base)) { | |
1712 | ret = PTR_ERR(info->mmio_base); | |
9ca7944d | 1713 | goto fail_disable_clk; |
fe69af00 | 1714 | } |
8638fac8 | 1715 | info->mmio_phys = r->start; |
fe69af00 | 1716 | |
62e8b851 EG |
1717 | /* Allocate a buffer to allow flash detection */ |
1718 | info->buf_size = INIT_BUFFER_SIZE; | |
1719 | info->data_buff = kmalloc(info->buf_size, GFP_KERNEL); | |
1720 | if (info->data_buff == NULL) { | |
1721 | ret = -ENOMEM; | |
9ca7944d | 1722 | goto fail_disable_clk; |
62e8b851 | 1723 | } |
fe69af00 | 1724 | |
346e1259 HZ |
1725 | /* initialize all interrupts to be disabled */ |
1726 | disable_int(info, NDSR_MASK); | |
1727 | ||
24542257 RJ |
1728 | ret = request_threaded_irq(irq, pxa3xx_nand_irq, |
1729 | pxa3xx_nand_irq_thread, IRQF_ONESHOT, | |
1730 | pdev->name, info); | |
fe69af00 | 1731 | if (ret < 0) { |
1732 | dev_err(&pdev->dev, "failed to request IRQ\n"); | |
1733 | goto fail_free_buf; | |
1734 | } | |
1735 | ||
e353a20a | 1736 | platform_set_drvdata(pdev, info); |
fe69af00 | 1737 | |
d456882b | 1738 | return 0; |
fe69af00 | 1739 | |
fe69af00 | 1740 | fail_free_buf: |
401e67e2 | 1741 | free_irq(irq, info); |
62e8b851 | 1742 | kfree(info->data_buff); |
9ca7944d | 1743 | fail_disable_clk: |
fb32061f | 1744 | clk_disable_unprepare(info->clk); |
d456882b | 1745 | return ret; |
fe69af00 | 1746 | } |
1747 | ||
1748 | static int pxa3xx_nand_remove(struct platform_device *pdev) | |
1749 | { | |
e353a20a | 1750 | struct pxa3xx_nand_info *info = platform_get_drvdata(pdev); |
f3c8cfc2 | 1751 | struct pxa3xx_nand_platform_data *pdata; |
f3c8cfc2 | 1752 | int irq, cs; |
fe69af00 | 1753 | |
d456882b LW |
1754 | if (!info) |
1755 | return 0; | |
1756 | ||
453810b7 | 1757 | pdata = dev_get_platdata(&pdev->dev); |
fe69af00 | 1758 | |
dbf5986a HZ |
1759 | irq = platform_get_irq(pdev, 0); |
1760 | if (irq >= 0) | |
1761 | free_irq(irq, info); | |
498b6145 | 1762 | pxa3xx_nand_free_buff(info); |
82a72d10 | 1763 | |
fb32061f | 1764 | clk_disable_unprepare(info->clk); |
82a72d10 | 1765 | |
f3c8cfc2 LW |
1766 | for (cs = 0; cs < pdata->num_cs; cs++) |
1767 | nand_release(info->host[cs]->mtd); | |
fe69af00 | 1768 | return 0; |
1769 | } | |
1770 | ||
1e7ba630 DM |
1771 | static int pxa3xx_nand_probe_dt(struct platform_device *pdev) |
1772 | { | |
1773 | struct pxa3xx_nand_platform_data *pdata; | |
1774 | struct device_node *np = pdev->dev.of_node; | |
1775 | const struct of_device_id *of_id = | |
1776 | of_match_device(pxa3xx_nand_dt_ids, &pdev->dev); | |
1777 | ||
1778 | if (!of_id) | |
1779 | return 0; | |
1780 | ||
1781 | pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); | |
1782 | if (!pdata) | |
1783 | return -ENOMEM; | |
1784 | ||
1785 | if (of_get_property(np, "marvell,nand-enable-arbiter", NULL)) | |
1786 | pdata->enable_arbiter = 1; | |
1787 | if (of_get_property(np, "marvell,nand-keep-config", NULL)) | |
1788 | pdata->keep_config = 1; | |
1789 | of_property_read_u32(np, "num-cs", &pdata->num_cs); | |
776f265e | 1790 | pdata->flash_bbt = of_get_nand_on_flash_bbt(np); |
1e7ba630 | 1791 | |
5b3e5078 EG |
1792 | pdata->ecc_strength = of_get_nand_ecc_strength(np); |
1793 | if (pdata->ecc_strength < 0) | |
1794 | pdata->ecc_strength = 0; | |
1795 | ||
1796 | pdata->ecc_step_size = of_get_nand_ecc_step_size(np); | |
1797 | if (pdata->ecc_step_size < 0) | |
1798 | pdata->ecc_step_size = 0; | |
1799 | ||
1e7ba630 DM |
1800 | pdev->dev.platform_data = pdata; |
1801 | ||
1802 | return 0; | |
1803 | } | |
1e7ba630 | 1804 | |
e353a20a LW |
1805 | static int pxa3xx_nand_probe(struct platform_device *pdev) |
1806 | { | |
1807 | struct pxa3xx_nand_platform_data *pdata; | |
1e7ba630 | 1808 | struct mtd_part_parser_data ppdata = {}; |
e353a20a | 1809 | struct pxa3xx_nand_info *info; |
f3c8cfc2 | 1810 | int ret, cs, probe_success; |
e353a20a | 1811 | |
f4db2e3a EG |
1812 | #ifndef ARCH_HAS_DMA |
1813 | if (use_dma) { | |
1814 | use_dma = 0; | |
1815 | dev_warn(&pdev->dev, | |
1816 | "This platform can't do DMA on this device\n"); | |
1817 | } | |
1818 | #endif | |
1e7ba630 DM |
1819 | ret = pxa3xx_nand_probe_dt(pdev); |
1820 | if (ret) | |
1821 | return ret; | |
1822 | ||
453810b7 | 1823 | pdata = dev_get_platdata(&pdev->dev); |
e353a20a LW |
1824 | if (!pdata) { |
1825 | dev_err(&pdev->dev, "no platform data defined\n"); | |
1826 | return -ENODEV; | |
1827 | } | |
1828 | ||
d456882b LW |
1829 | ret = alloc_nand_resource(pdev); |
1830 | if (ret) { | |
1831 | dev_err(&pdev->dev, "alloc nand resource failed\n"); | |
1832 | return ret; | |
1833 | } | |
e353a20a | 1834 | |
d456882b | 1835 | info = platform_get_drvdata(pdev); |
f3c8cfc2 LW |
1836 | probe_success = 0; |
1837 | for (cs = 0; cs < pdata->num_cs; cs++) { | |
b7655bcb | 1838 | struct mtd_info *mtd = info->host[cs]->mtd; |
f455578d | 1839 | |
18a84e93 EG |
1840 | /* |
1841 | * The mtd name matches the one used in 'mtdparts' kernel | |
1842 | * parameter. This name cannot be changed or otherwise | |
1843 | * user's mtd partitions configuration would get broken. | |
1844 | */ | |
1845 | mtd->name = "pxa3xx_nand-0"; | |
f3c8cfc2 | 1846 | info->cs = cs; |
b7655bcb | 1847 | ret = pxa3xx_nand_scan(mtd); |
f3c8cfc2 LW |
1848 | if (ret) { |
1849 | dev_warn(&pdev->dev, "failed to scan nand at cs %d\n", | |
1850 | cs); | |
1851 | continue; | |
1852 | } | |
1853 | ||
1e7ba630 | 1854 | ppdata.of_node = pdev->dev.of_node; |
b7655bcb | 1855 | ret = mtd_device_parse_register(mtd, NULL, |
1e7ba630 | 1856 | &ppdata, pdata->parts[cs], |
42d7fbe2 | 1857 | pdata->nr_parts[cs]); |
f3c8cfc2 LW |
1858 | if (!ret) |
1859 | probe_success = 1; | |
1860 | } | |
1861 | ||
1862 | if (!probe_success) { | |
e353a20a LW |
1863 | pxa3xx_nand_remove(pdev); |
1864 | return -ENODEV; | |
1865 | } | |
1866 | ||
f3c8cfc2 | 1867 | return 0; |
e353a20a LW |
1868 | } |
1869 | ||
fe69af00 | 1870 | #ifdef CONFIG_PM |
1871 | static int pxa3xx_nand_suspend(struct platform_device *pdev, pm_message_t state) | |
1872 | { | |
e353a20a | 1873 | struct pxa3xx_nand_info *info = platform_get_drvdata(pdev); |
f3c8cfc2 LW |
1874 | struct pxa3xx_nand_platform_data *pdata; |
1875 | struct mtd_info *mtd; | |
1876 | int cs; | |
fe69af00 | 1877 | |
453810b7 | 1878 | pdata = dev_get_platdata(&pdev->dev); |
f8155a40 | 1879 | if (info->state) { |
fe69af00 | 1880 | dev_err(&pdev->dev, "driver busy, state = %d\n", info->state); |
1881 | return -EAGAIN; | |
1882 | } | |
1883 | ||
f3c8cfc2 LW |
1884 | for (cs = 0; cs < pdata->num_cs; cs++) { |
1885 | mtd = info->host[cs]->mtd; | |
3fe4bae8 | 1886 | mtd_suspend(mtd); |
f3c8cfc2 LW |
1887 | } |
1888 | ||
fe69af00 | 1889 | return 0; |
1890 | } | |
1891 | ||
1892 | static int pxa3xx_nand_resume(struct platform_device *pdev) | |
1893 | { | |
e353a20a | 1894 | struct pxa3xx_nand_info *info = platform_get_drvdata(pdev); |
f3c8cfc2 LW |
1895 | struct pxa3xx_nand_platform_data *pdata; |
1896 | struct mtd_info *mtd; | |
1897 | int cs; | |
051fc41c | 1898 | |
453810b7 | 1899 | pdata = dev_get_platdata(&pdev->dev); |
051fc41c LW |
1900 | /* We don't want to handle interrupt without calling mtd routine */ |
1901 | disable_int(info, NDCR_INT_MASK); | |
fe69af00 | 1902 | |
f3c8cfc2 LW |
1903 | /* |
1904 | * Directly set the chip select to a invalid value, | |
1905 | * then the driver would reset the timing according | |
1906 | * to current chip select at the beginning of cmdfunc | |
1907 | */ | |
1908 | info->cs = 0xff; | |
fe69af00 | 1909 | |
051fc41c LW |
1910 | /* |
1911 | * As the spec says, the NDSR would be updated to 0x1800 when | |
1912 | * doing the nand_clk disable/enable. | |
1913 | * To prevent it damaging state machine of the driver, clear | |
1914 | * all status before resume | |
1915 | */ | |
1916 | nand_writel(info, NDSR, NDSR_MASK); | |
f3c8cfc2 LW |
1917 | for (cs = 0; cs < pdata->num_cs; cs++) { |
1918 | mtd = info->host[cs]->mtd; | |
ead995f8 | 1919 | mtd_resume(mtd); |
f3c8cfc2 LW |
1920 | } |
1921 | ||
18c81b18 | 1922 | return 0; |
fe69af00 | 1923 | } |
1924 | #else | |
1925 | #define pxa3xx_nand_suspend NULL | |
1926 | #define pxa3xx_nand_resume NULL | |
1927 | #endif | |
1928 | ||
1929 | static struct platform_driver pxa3xx_nand_driver = { | |
1930 | .driver = { | |
1931 | .name = "pxa3xx-nand", | |
5576bc7b | 1932 | .of_match_table = pxa3xx_nand_dt_ids, |
fe69af00 | 1933 | }, |
1934 | .probe = pxa3xx_nand_probe, | |
1935 | .remove = pxa3xx_nand_remove, | |
1936 | .suspend = pxa3xx_nand_suspend, | |
1937 | .resume = pxa3xx_nand_resume, | |
1938 | }; | |
1939 | ||
f99640de | 1940 | module_platform_driver(pxa3xx_nand_driver); |
fe69af00 | 1941 | |
1942 | MODULE_LICENSE("GPL"); | |
1943 | MODULE_DESCRIPTION("PXA3xx NAND controller driver"); |