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82771882 PK |
1 | /* |
2 | * Freescale Integrated Flash Controller NAND driver | |
3 | * | |
4 | * Copyright 2011-2012 Freescale Semiconductor, Inc | |
5 | * | |
6 | * Author: Dipen Dudhat <Dipen.Dudhat@freescale.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/kernel.h> | |
5af50730 | 27 | #include <linux/of_address.h> |
82771882 PK |
28 | #include <linux/slab.h> |
29 | #include <linux/mtd/mtd.h> | |
30 | #include <linux/mtd/nand.h> | |
31 | #include <linux/mtd/partitions.h> | |
32 | #include <linux/mtd/nand_ecc.h> | |
33 | #include <asm/fsl_ifc.h> | |
34 | ||
10bfa766 | 35 | #define FSL_IFC_V1_1_0 0x01010000 |
82771882 PK |
36 | #define ERR_BYTE 0xFF /* Value returned for read |
37 | bytes when read failed */ | |
38 | #define IFC_TIMEOUT_MSECS 500 /* Maximum number of mSecs to wait | |
39 | for IFC NAND Machine */ | |
40 | ||
41 | struct fsl_ifc_ctrl; | |
42 | ||
43 | /* mtd information per set */ | |
44 | struct fsl_ifc_mtd { | |
45 | struct mtd_info mtd; | |
46 | struct nand_chip chip; | |
47 | struct fsl_ifc_ctrl *ctrl; | |
48 | ||
49 | struct device *dev; | |
50 | int bank; /* Chip select bank number */ | |
51 | unsigned int bufnum_mask; /* bufnum = page & bufnum_mask */ | |
52 | u8 __iomem *vbase; /* Chip select base virtual address */ | |
53 | }; | |
54 | ||
55 | /* overview of the fsl ifc controller */ | |
56 | struct fsl_ifc_nand_ctrl { | |
57 | struct nand_hw_control controller; | |
58 | struct fsl_ifc_mtd *chips[FSL_IFC_BANK_COUNT]; | |
59 | ||
60 | u8 __iomem *addr; /* Address of assigned IFC buffer */ | |
61 | unsigned int page; /* Last page written to / read from */ | |
62 | unsigned int read_bytes;/* Number of bytes read during command */ | |
63 | unsigned int column; /* Saved column from SEQIN */ | |
64 | unsigned int index; /* Pointer to next byte to 'read' */ | |
65 | unsigned int oob; /* Non zero if operating on OOB data */ | |
66 | unsigned int eccread; /* Non zero for a full-page ECC read */ | |
67 | unsigned int counter; /* counter for the initializations */ | |
3f91e94f | 68 | unsigned int max_bitflips; /* Saved during READ0 cmd */ |
82771882 PK |
69 | }; |
70 | ||
71 | static struct fsl_ifc_nand_ctrl *ifc_nand_ctrl; | |
72 | ||
73 | /* 512-byte page with 4-bit ECC, 8-bit */ | |
74 | static struct nand_ecclayout oob_512_8bit_ecc4 = { | |
75 | .eccbytes = 8, | |
76 | .eccpos = {8, 9, 10, 11, 12, 13, 14, 15}, | |
77 | .oobfree = { {0, 5}, {6, 2} }, | |
78 | }; | |
79 | ||
80 | /* 512-byte page with 4-bit ECC, 16-bit */ | |
81 | static struct nand_ecclayout oob_512_16bit_ecc4 = { | |
82 | .eccbytes = 8, | |
83 | .eccpos = {8, 9, 10, 11, 12, 13, 14, 15}, | |
84 | .oobfree = { {2, 6}, }, | |
85 | }; | |
86 | ||
87 | /* 2048-byte page size with 4-bit ECC */ | |
88 | static struct nand_ecclayout oob_2048_ecc4 = { | |
89 | .eccbytes = 32, | |
90 | .eccpos = { | |
91 | 8, 9, 10, 11, 12, 13, 14, 15, | |
92 | 16, 17, 18, 19, 20, 21, 22, 23, | |
93 | 24, 25, 26, 27, 28, 29, 30, 31, | |
94 | 32, 33, 34, 35, 36, 37, 38, 39, | |
95 | }, | |
96 | .oobfree = { {2, 6}, {40, 24} }, | |
97 | }; | |
98 | ||
99 | /* 4096-byte page size with 4-bit ECC */ | |
100 | static struct nand_ecclayout oob_4096_ecc4 = { | |
101 | .eccbytes = 64, | |
102 | .eccpos = { | |
103 | 8, 9, 10, 11, 12, 13, 14, 15, | |
104 | 16, 17, 18, 19, 20, 21, 22, 23, | |
105 | 24, 25, 26, 27, 28, 29, 30, 31, | |
106 | 32, 33, 34, 35, 36, 37, 38, 39, | |
107 | 40, 41, 42, 43, 44, 45, 46, 47, | |
108 | 48, 49, 50, 51, 52, 53, 54, 55, | |
109 | 56, 57, 58, 59, 60, 61, 62, 63, | |
110 | 64, 65, 66, 67, 68, 69, 70, 71, | |
111 | }, | |
112 | .oobfree = { {2, 6}, {72, 56} }, | |
113 | }; | |
114 | ||
115 | /* 4096-byte page size with 8-bit ECC -- requires 218-byte OOB */ | |
116 | static struct nand_ecclayout oob_4096_ecc8 = { | |
117 | .eccbytes = 128, | |
118 | .eccpos = { | |
119 | 8, 9, 10, 11, 12, 13, 14, 15, | |
120 | 16, 17, 18, 19, 20, 21, 22, 23, | |
121 | 24, 25, 26, 27, 28, 29, 30, 31, | |
122 | 32, 33, 34, 35, 36, 37, 38, 39, | |
123 | 40, 41, 42, 43, 44, 45, 46, 47, | |
124 | 48, 49, 50, 51, 52, 53, 54, 55, | |
125 | 56, 57, 58, 59, 60, 61, 62, 63, | |
126 | 64, 65, 66, 67, 68, 69, 70, 71, | |
127 | 72, 73, 74, 75, 76, 77, 78, 79, | |
128 | 80, 81, 82, 83, 84, 85, 86, 87, | |
129 | 88, 89, 90, 91, 92, 93, 94, 95, | |
130 | 96, 97, 98, 99, 100, 101, 102, 103, | |
131 | 104, 105, 106, 107, 108, 109, 110, 111, | |
132 | 112, 113, 114, 115, 116, 117, 118, 119, | |
133 | 120, 121, 122, 123, 124, 125, 126, 127, | |
134 | 128, 129, 130, 131, 132, 133, 134, 135, | |
135 | }, | |
136 | .oobfree = { {2, 6}, {136, 82} }, | |
137 | }; | |
138 | ||
ebff90b2 PK |
139 | /* 8192-byte page size with 4-bit ECC */ |
140 | static struct nand_ecclayout oob_8192_ecc4 = { | |
141 | .eccbytes = 128, | |
142 | .eccpos = { | |
143 | 8, 9, 10, 11, 12, 13, 14, 15, | |
144 | 16, 17, 18, 19, 20, 21, 22, 23, | |
145 | 24, 25, 26, 27, 28, 29, 30, 31, | |
146 | 32, 33, 34, 35, 36, 37, 38, 39, | |
147 | 40, 41, 42, 43, 44, 45, 46, 47, | |
148 | 48, 49, 50, 51, 52, 53, 54, 55, | |
149 | 56, 57, 58, 59, 60, 61, 62, 63, | |
150 | 64, 65, 66, 67, 68, 69, 70, 71, | |
151 | 72, 73, 74, 75, 76, 77, 78, 79, | |
152 | 80, 81, 82, 83, 84, 85, 86, 87, | |
153 | 88, 89, 90, 91, 92, 93, 94, 95, | |
154 | 96, 97, 98, 99, 100, 101, 102, 103, | |
155 | 104, 105, 106, 107, 108, 109, 110, 111, | |
156 | 112, 113, 114, 115, 116, 117, 118, 119, | |
157 | 120, 121, 122, 123, 124, 125, 126, 127, | |
158 | 128, 129, 130, 131, 132, 133, 134, 135, | |
159 | }, | |
160 | .oobfree = { {2, 6}, {136, 208} }, | |
161 | }; | |
162 | ||
163 | /* 8192-byte page size with 8-bit ECC -- requires 218-byte OOB */ | |
164 | static struct nand_ecclayout oob_8192_ecc8 = { | |
165 | .eccbytes = 256, | |
166 | .eccpos = { | |
167 | 8, 9, 10, 11, 12, 13, 14, 15, | |
168 | 16, 17, 18, 19, 20, 21, 22, 23, | |
169 | 24, 25, 26, 27, 28, 29, 30, 31, | |
170 | 32, 33, 34, 35, 36, 37, 38, 39, | |
171 | 40, 41, 42, 43, 44, 45, 46, 47, | |
172 | 48, 49, 50, 51, 52, 53, 54, 55, | |
173 | 56, 57, 58, 59, 60, 61, 62, 63, | |
174 | 64, 65, 66, 67, 68, 69, 70, 71, | |
175 | 72, 73, 74, 75, 76, 77, 78, 79, | |
176 | 80, 81, 82, 83, 84, 85, 86, 87, | |
177 | 88, 89, 90, 91, 92, 93, 94, 95, | |
178 | 96, 97, 98, 99, 100, 101, 102, 103, | |
179 | 104, 105, 106, 107, 108, 109, 110, 111, | |
180 | 112, 113, 114, 115, 116, 117, 118, 119, | |
181 | 120, 121, 122, 123, 124, 125, 126, 127, | |
182 | 128, 129, 130, 131, 132, 133, 134, 135, | |
183 | 136, 137, 138, 139, 140, 141, 142, 143, | |
184 | 144, 145, 146, 147, 148, 149, 150, 151, | |
185 | 152, 153, 154, 155, 156, 157, 158, 159, | |
186 | 160, 161, 162, 163, 164, 165, 166, 167, | |
187 | 168, 169, 170, 171, 172, 173, 174, 175, | |
188 | 176, 177, 178, 179, 180, 181, 182, 183, | |
189 | 184, 185, 186, 187, 188, 189, 190, 191, | |
190 | 192, 193, 194, 195, 196, 197, 198, 199, | |
191 | 200, 201, 202, 203, 204, 205, 206, 207, | |
192 | 208, 209, 210, 211, 212, 213, 214, 215, | |
193 | 216, 217, 218, 219, 220, 221, 222, 223, | |
194 | 224, 225, 226, 227, 228, 229, 230, 231, | |
195 | 232, 233, 234, 235, 236, 237, 238, 239, | |
196 | 240, 241, 242, 243, 244, 245, 246, 247, | |
197 | 248, 249, 250, 251, 252, 253, 254, 255, | |
198 | 256, 257, 258, 259, 260, 261, 262, 263, | |
199 | }, | |
200 | .oobfree = { {2, 6}, {264, 80} }, | |
201 | }; | |
82771882 PK |
202 | |
203 | /* | |
204 | * Generic flash bbt descriptors | |
205 | */ | |
206 | static u8 bbt_pattern[] = {'B', 'b', 't', '0' }; | |
207 | static u8 mirror_pattern[] = {'1', 't', 'b', 'B' }; | |
208 | ||
209 | static struct nand_bbt_descr bbt_main_descr = { | |
210 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | | |
211 | NAND_BBT_2BIT | NAND_BBT_VERSION, | |
212 | .offs = 2, /* 0 on 8-bit small page */ | |
213 | .len = 4, | |
214 | .veroffs = 6, | |
215 | .maxblocks = 4, | |
216 | .pattern = bbt_pattern, | |
217 | }; | |
218 | ||
219 | static struct nand_bbt_descr bbt_mirror_descr = { | |
220 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | | |
221 | NAND_BBT_2BIT | NAND_BBT_VERSION, | |
222 | .offs = 2, /* 0 on 8-bit small page */ | |
223 | .len = 4, | |
224 | .veroffs = 6, | |
225 | .maxblocks = 4, | |
226 | .pattern = mirror_pattern, | |
227 | }; | |
228 | ||
229 | /* | |
230 | * Set up the IFC hardware block and page address fields, and the ifc nand | |
231 | * structure addr field to point to the correct IFC buffer in memory | |
232 | */ | |
233 | static void set_addr(struct mtd_info *mtd, int column, int page_addr, int oob) | |
234 | { | |
235 | struct nand_chip *chip = mtd->priv; | |
236 | struct fsl_ifc_mtd *priv = chip->priv; | |
237 | struct fsl_ifc_ctrl *ctrl = priv->ctrl; | |
238 | struct fsl_ifc_regs __iomem *ifc = ctrl->regs; | |
239 | int buf_num; | |
240 | ||
241 | ifc_nand_ctrl->page = page_addr; | |
242 | /* Program ROW0/COL0 */ | |
0c69fb03 KP |
243 | iowrite32be(page_addr, &ifc->ifc_nand.row0); |
244 | iowrite32be((oob ? IFC_NAND_COL_MS : 0) | column, &ifc->ifc_nand.col0); | |
82771882 PK |
245 | |
246 | buf_num = page_addr & priv->bufnum_mask; | |
247 | ||
248 | ifc_nand_ctrl->addr = priv->vbase + buf_num * (mtd->writesize * 2); | |
249 | ifc_nand_ctrl->index = column; | |
250 | ||
251 | /* for OOB data point to the second half of the buffer */ | |
252 | if (oob) | |
253 | ifc_nand_ctrl->index += mtd->writesize; | |
254 | } | |
255 | ||
256 | static int is_blank(struct mtd_info *mtd, unsigned int bufnum) | |
257 | { | |
258 | struct nand_chip *chip = mtd->priv; | |
259 | struct fsl_ifc_mtd *priv = chip->priv; | |
260 | u8 __iomem *addr = priv->vbase + bufnum * (mtd->writesize * 2); | |
2caf87a4 | 261 | u32 __iomem *mainarea = (u32 __iomem *)addr; |
82771882 PK |
262 | u8 __iomem *oob = addr + mtd->writesize; |
263 | int i; | |
264 | ||
265 | for (i = 0; i < mtd->writesize / 4; i++) { | |
266 | if (__raw_readl(&mainarea[i]) != 0xffffffff) | |
267 | return 0; | |
268 | } | |
269 | ||
270 | for (i = 0; i < chip->ecc.layout->eccbytes; i++) { | |
271 | int pos = chip->ecc.layout->eccpos[i]; | |
272 | ||
273 | if (__raw_readb(&oob[pos]) != 0xff) | |
274 | return 0; | |
275 | } | |
276 | ||
277 | return 1; | |
278 | } | |
279 | ||
280 | /* returns nonzero if entire page is blank */ | |
281 | static int check_read_ecc(struct mtd_info *mtd, struct fsl_ifc_ctrl *ctrl, | |
282 | u32 *eccstat, unsigned int bufnum) | |
283 | { | |
284 | u32 reg = eccstat[bufnum / 4]; | |
285 | int errors; | |
286 | ||
287 | errors = (reg >> ((3 - bufnum % 4) * 8)) & 15; | |
288 | ||
289 | return errors; | |
290 | } | |
291 | ||
292 | /* | |
293 | * execute IFC NAND command and wait for it to complete | |
294 | */ | |
295 | static void fsl_ifc_run_command(struct mtd_info *mtd) | |
296 | { | |
297 | struct nand_chip *chip = mtd->priv; | |
298 | struct fsl_ifc_mtd *priv = chip->priv; | |
299 | struct fsl_ifc_ctrl *ctrl = priv->ctrl; | |
300 | struct fsl_ifc_nand_ctrl *nctrl = ifc_nand_ctrl; | |
301 | struct fsl_ifc_regs __iomem *ifc = ctrl->regs; | |
302 | u32 eccstat[4]; | |
303 | int i; | |
304 | ||
305 | /* set the chip select for NAND Transaction */ | |
0c69fb03 KP |
306 | iowrite32be(priv->bank << IFC_NAND_CSEL_SHIFT, |
307 | &ifc->ifc_nand.nand_csel); | |
82771882 PK |
308 | |
309 | dev_vdbg(priv->dev, | |
310 | "%s: fir0=%08x fcr0=%08x\n", | |
311 | __func__, | |
0c69fb03 KP |
312 | ioread32be(&ifc->ifc_nand.nand_fir0), |
313 | ioread32be(&ifc->ifc_nand.nand_fcr0)); | |
82771882 PK |
314 | |
315 | ctrl->nand_stat = 0; | |
316 | ||
317 | /* start read/write seq */ | |
0c69fb03 | 318 | iowrite32be(IFC_NAND_SEQ_STRT_FIR_STRT, &ifc->ifc_nand.nandseq_strt); |
82771882 PK |
319 | |
320 | /* wait for command complete flag or timeout */ | |
321 | wait_event_timeout(ctrl->nand_wait, ctrl->nand_stat, | |
322 | IFC_TIMEOUT_MSECS * HZ/1000); | |
323 | ||
324 | /* ctrl->nand_stat will be updated from IRQ context */ | |
325 | if (!ctrl->nand_stat) | |
326 | dev_err(priv->dev, "Controller is not responding\n"); | |
327 | if (ctrl->nand_stat & IFC_NAND_EVTER_STAT_FTOER) | |
328 | dev_err(priv->dev, "NAND Flash Timeout Error\n"); | |
329 | if (ctrl->nand_stat & IFC_NAND_EVTER_STAT_WPER) | |
330 | dev_err(priv->dev, "NAND Flash Write Protect Error\n"); | |
331 | ||
3f91e94f MD |
332 | nctrl->max_bitflips = 0; |
333 | ||
82771882 PK |
334 | if (nctrl->eccread) { |
335 | int errors; | |
336 | int bufnum = nctrl->page & priv->bufnum_mask; | |
337 | int sector = bufnum * chip->ecc.steps; | |
338 | int sector_end = sector + chip->ecc.steps - 1; | |
339 | ||
340 | for (i = sector / 4; i <= sector_end / 4; i++) | |
0c69fb03 | 341 | eccstat[i] = ioread32be(&ifc->ifc_nand.nand_eccstat[i]); |
82771882 PK |
342 | |
343 | for (i = sector; i <= sector_end; i++) { | |
344 | errors = check_read_ecc(mtd, ctrl, eccstat, i); | |
345 | ||
346 | if (errors == 15) { | |
347 | /* | |
348 | * Uncorrectable error. | |
349 | * OK only if the whole page is blank. | |
350 | * | |
351 | * We disable ECCER reporting due to... | |
352 | * erratum IFC-A002770 -- so report it now if we | |
353 | * see an uncorrectable error in ECCSTAT. | |
354 | */ | |
355 | if (!is_blank(mtd, bufnum)) | |
356 | ctrl->nand_stat |= | |
357 | IFC_NAND_EVTER_STAT_ECCER; | |
358 | break; | |
359 | } | |
360 | ||
361 | mtd->ecc_stats.corrected += errors; | |
3f91e94f MD |
362 | nctrl->max_bitflips = max_t(unsigned int, |
363 | nctrl->max_bitflips, | |
364 | errors); | |
82771882 PK |
365 | } |
366 | ||
367 | nctrl->eccread = 0; | |
368 | } | |
369 | } | |
370 | ||
371 | static void fsl_ifc_do_read(struct nand_chip *chip, | |
372 | int oob, | |
373 | struct mtd_info *mtd) | |
374 | { | |
375 | struct fsl_ifc_mtd *priv = chip->priv; | |
376 | struct fsl_ifc_ctrl *ctrl = priv->ctrl; | |
377 | struct fsl_ifc_regs __iomem *ifc = ctrl->regs; | |
378 | ||
379 | /* Program FIR/IFC_NAND_FCR0 for Small/Large page */ | |
380 | if (mtd->writesize > 512) { | |
0c69fb03 KP |
381 | iowrite32be((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | |
382 | (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP1_SHIFT) | | |
383 | (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP2_SHIFT) | | |
384 | (IFC_FIR_OP_CMD1 << IFC_NAND_FIR0_OP3_SHIFT) | | |
385 | (IFC_FIR_OP_RBCD << IFC_NAND_FIR0_OP4_SHIFT), | |
386 | &ifc->ifc_nand.nand_fir0); | |
387 | iowrite32be(0x0, &ifc->ifc_nand.nand_fir1); | |
388 | ||
389 | iowrite32be((NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT) | | |
390 | (NAND_CMD_READSTART << IFC_NAND_FCR0_CMD1_SHIFT), | |
391 | &ifc->ifc_nand.nand_fcr0); | |
82771882 | 392 | } else { |
0c69fb03 KP |
393 | iowrite32be((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | |
394 | (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP1_SHIFT) | | |
395 | (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP2_SHIFT) | | |
396 | (IFC_FIR_OP_RBCD << IFC_NAND_FIR0_OP3_SHIFT), | |
397 | &ifc->ifc_nand.nand_fir0); | |
398 | iowrite32be(0x0, &ifc->ifc_nand.nand_fir1); | |
82771882 PK |
399 | |
400 | if (oob) | |
0c69fb03 KP |
401 | iowrite32be(NAND_CMD_READOOB << |
402 | IFC_NAND_FCR0_CMD0_SHIFT, | |
403 | &ifc->ifc_nand.nand_fcr0); | |
82771882 | 404 | else |
0c69fb03 KP |
405 | iowrite32be(NAND_CMD_READ0 << |
406 | IFC_NAND_FCR0_CMD0_SHIFT, | |
407 | &ifc->ifc_nand.nand_fcr0); | |
82771882 PK |
408 | } |
409 | } | |
410 | ||
411 | /* cmdfunc send commands to the IFC NAND Machine */ | |
412 | static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command, | |
413 | int column, int page_addr) { | |
414 | struct nand_chip *chip = mtd->priv; | |
415 | struct fsl_ifc_mtd *priv = chip->priv; | |
416 | struct fsl_ifc_ctrl *ctrl = priv->ctrl; | |
417 | struct fsl_ifc_regs __iomem *ifc = ctrl->regs; | |
418 | ||
419 | /* clear the read buffer */ | |
420 | ifc_nand_ctrl->read_bytes = 0; | |
421 | if (command != NAND_CMD_PAGEPROG) | |
422 | ifc_nand_ctrl->index = 0; | |
423 | ||
424 | switch (command) { | |
425 | /* READ0 read the entire buffer to use hardware ECC. */ | |
426 | case NAND_CMD_READ0: | |
0c69fb03 | 427 | iowrite32be(0, &ifc->ifc_nand.nand_fbcr); |
82771882 PK |
428 | set_addr(mtd, 0, page_addr, 0); |
429 | ||
430 | ifc_nand_ctrl->read_bytes = mtd->writesize + mtd->oobsize; | |
431 | ifc_nand_ctrl->index += column; | |
432 | ||
433 | if (chip->ecc.mode == NAND_ECC_HW) | |
434 | ifc_nand_ctrl->eccread = 1; | |
435 | ||
436 | fsl_ifc_do_read(chip, 0, mtd); | |
437 | fsl_ifc_run_command(mtd); | |
438 | return; | |
439 | ||
440 | /* READOOB reads only the OOB because no ECC is performed. */ | |
441 | case NAND_CMD_READOOB: | |
0c69fb03 | 442 | iowrite32be(mtd->oobsize - column, &ifc->ifc_nand.nand_fbcr); |
82771882 PK |
443 | set_addr(mtd, column, page_addr, 1); |
444 | ||
445 | ifc_nand_ctrl->read_bytes = mtd->writesize + mtd->oobsize; | |
446 | ||
447 | fsl_ifc_do_read(chip, 1, mtd); | |
448 | fsl_ifc_run_command(mtd); | |
449 | ||
450 | return; | |
451 | ||
82771882 | 452 | case NAND_CMD_READID: |
59fdd5b9 PK |
453 | case NAND_CMD_PARAM: { |
454 | int timing = IFC_FIR_OP_RB; | |
455 | if (command == NAND_CMD_PARAM) | |
456 | timing = IFC_FIR_OP_RBCD; | |
457 | ||
0c69fb03 KP |
458 | iowrite32be((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | |
459 | (IFC_FIR_OP_UA << IFC_NAND_FIR0_OP1_SHIFT) | | |
460 | (timing << IFC_NAND_FIR0_OP2_SHIFT), | |
461 | &ifc->ifc_nand.nand_fir0); | |
462 | iowrite32be(command << IFC_NAND_FCR0_CMD0_SHIFT, | |
463 | &ifc->ifc_nand.nand_fcr0); | |
464 | iowrite32be(column, &ifc->ifc_nand.row3); | |
59fdd5b9 PK |
465 | |
466 | /* | |
467 | * although currently it's 8 bytes for READID, we always read | |
468 | * the maximum 256 bytes(for PARAM) | |
469 | */ | |
0c69fb03 | 470 | iowrite32be(256, &ifc->ifc_nand.nand_fbcr); |
59fdd5b9 | 471 | ifc_nand_ctrl->read_bytes = 256; |
82771882 PK |
472 | |
473 | set_addr(mtd, 0, 0, 0); | |
474 | fsl_ifc_run_command(mtd); | |
475 | return; | |
59fdd5b9 | 476 | } |
82771882 PK |
477 | |
478 | /* ERASE1 stores the block and page address */ | |
479 | case NAND_CMD_ERASE1: | |
480 | set_addr(mtd, 0, page_addr, 0); | |
481 | return; | |
482 | ||
483 | /* ERASE2 uses the block and page address from ERASE1 */ | |
484 | case NAND_CMD_ERASE2: | |
0c69fb03 KP |
485 | iowrite32be((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | |
486 | (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP1_SHIFT) | | |
487 | (IFC_FIR_OP_CMD1 << IFC_NAND_FIR0_OP2_SHIFT), | |
488 | &ifc->ifc_nand.nand_fir0); | |
82771882 | 489 | |
0c69fb03 KP |
490 | iowrite32be((NAND_CMD_ERASE1 << IFC_NAND_FCR0_CMD0_SHIFT) | |
491 | (NAND_CMD_ERASE2 << IFC_NAND_FCR0_CMD1_SHIFT), | |
492 | &ifc->ifc_nand.nand_fcr0); | |
82771882 | 493 | |
0c69fb03 | 494 | iowrite32be(0, &ifc->ifc_nand.nand_fbcr); |
82771882 PK |
495 | ifc_nand_ctrl->read_bytes = 0; |
496 | fsl_ifc_run_command(mtd); | |
497 | return; | |
498 | ||
499 | /* SEQIN sets up the addr buffer and all registers except the length */ | |
500 | case NAND_CMD_SEQIN: { | |
501 | u32 nand_fcr0; | |
502 | ifc_nand_ctrl->column = column; | |
503 | ifc_nand_ctrl->oob = 0; | |
504 | ||
505 | if (mtd->writesize > 512) { | |
506 | nand_fcr0 = | |
507 | (NAND_CMD_SEQIN << IFC_NAND_FCR0_CMD0_SHIFT) | | |
4af98749 PK |
508 | (NAND_CMD_STATUS << IFC_NAND_FCR0_CMD1_SHIFT) | |
509 | (NAND_CMD_PAGEPROG << IFC_NAND_FCR0_CMD2_SHIFT); | |
82771882 | 510 | |
0c69fb03 | 511 | iowrite32be( |
4af98749 PK |
512 | (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | |
513 | (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP1_SHIFT) | | |
514 | (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP2_SHIFT) | | |
515 | (IFC_FIR_OP_WBCD << IFC_NAND_FIR0_OP3_SHIFT) | | |
516 | (IFC_FIR_OP_CMD2 << IFC_NAND_FIR0_OP4_SHIFT), | |
517 | &ifc->ifc_nand.nand_fir0); | |
518 | iowrite32be( | |
519 | (IFC_FIR_OP_CW1 << IFC_NAND_FIR1_OP5_SHIFT) | | |
520 | (IFC_FIR_OP_RDSTAT << | |
521 | IFC_NAND_FIR1_OP6_SHIFT) | | |
522 | (IFC_FIR_OP_NOP << IFC_NAND_FIR1_OP7_SHIFT), | |
523 | &ifc->ifc_nand.nand_fir1); | |
82771882 PK |
524 | } else { |
525 | nand_fcr0 = ((NAND_CMD_PAGEPROG << | |
526 | IFC_NAND_FCR0_CMD1_SHIFT) | | |
527 | (NAND_CMD_SEQIN << | |
4af98749 PK |
528 | IFC_NAND_FCR0_CMD2_SHIFT) | |
529 | (NAND_CMD_STATUS << | |
530 | IFC_NAND_FCR0_CMD3_SHIFT)); | |
82771882 | 531 | |
0c69fb03 KP |
532 | iowrite32be( |
533 | (IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | | |
534 | (IFC_FIR_OP_CMD2 << IFC_NAND_FIR0_OP1_SHIFT) | | |
535 | (IFC_FIR_OP_CA0 << IFC_NAND_FIR0_OP2_SHIFT) | | |
536 | (IFC_FIR_OP_RA0 << IFC_NAND_FIR0_OP3_SHIFT) | | |
537 | (IFC_FIR_OP_WBCD << IFC_NAND_FIR0_OP4_SHIFT), | |
538 | &ifc->ifc_nand.nand_fir0); | |
4af98749 PK |
539 | iowrite32be( |
540 | (IFC_FIR_OP_CMD1 << IFC_NAND_FIR1_OP5_SHIFT) | | |
541 | (IFC_FIR_OP_CW3 << IFC_NAND_FIR1_OP6_SHIFT) | | |
542 | (IFC_FIR_OP_RDSTAT << | |
543 | IFC_NAND_FIR1_OP7_SHIFT) | | |
544 | (IFC_FIR_OP_NOP << IFC_NAND_FIR1_OP8_SHIFT), | |
545 | &ifc->ifc_nand.nand_fir1); | |
82771882 PK |
546 | |
547 | if (column >= mtd->writesize) | |
548 | nand_fcr0 |= | |
549 | NAND_CMD_READOOB << IFC_NAND_FCR0_CMD0_SHIFT; | |
550 | else | |
551 | nand_fcr0 |= | |
552 | NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT; | |
553 | } | |
554 | ||
555 | if (column >= mtd->writesize) { | |
556 | /* OOB area --> READOOB */ | |
557 | column -= mtd->writesize; | |
558 | ifc_nand_ctrl->oob = 1; | |
559 | } | |
0c69fb03 | 560 | iowrite32be(nand_fcr0, &ifc->ifc_nand.nand_fcr0); |
82771882 PK |
561 | set_addr(mtd, column, page_addr, ifc_nand_ctrl->oob); |
562 | return; | |
563 | } | |
564 | ||
565 | /* PAGEPROG reuses all of the setup from SEQIN and adds the length */ | |
566 | case NAND_CMD_PAGEPROG: { | |
567 | if (ifc_nand_ctrl->oob) { | |
0c69fb03 KP |
568 | iowrite32be(ifc_nand_ctrl->index - |
569 | ifc_nand_ctrl->column, | |
570 | &ifc->ifc_nand.nand_fbcr); | |
82771882 | 571 | } else { |
0c69fb03 | 572 | iowrite32be(0, &ifc->ifc_nand.nand_fbcr); |
82771882 PK |
573 | } |
574 | ||
575 | fsl_ifc_run_command(mtd); | |
576 | return; | |
577 | } | |
578 | ||
579 | case NAND_CMD_STATUS: | |
0c69fb03 KP |
580 | iowrite32be((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | |
581 | (IFC_FIR_OP_RB << IFC_NAND_FIR0_OP1_SHIFT), | |
582 | &ifc->ifc_nand.nand_fir0); | |
583 | iowrite32be(NAND_CMD_STATUS << IFC_NAND_FCR0_CMD0_SHIFT, | |
584 | &ifc->ifc_nand.nand_fcr0); | |
585 | iowrite32be(1, &ifc->ifc_nand.nand_fbcr); | |
82771882 PK |
586 | set_addr(mtd, 0, 0, 0); |
587 | ifc_nand_ctrl->read_bytes = 1; | |
588 | ||
589 | fsl_ifc_run_command(mtd); | |
590 | ||
591 | /* | |
592 | * The chip always seems to report that it is | |
593 | * write-protected, even when it is not. | |
594 | */ | |
595 | setbits8(ifc_nand_ctrl->addr, NAND_STATUS_WP); | |
596 | return; | |
597 | ||
598 | case NAND_CMD_RESET: | |
0c69fb03 KP |
599 | iowrite32be(IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT, |
600 | &ifc->ifc_nand.nand_fir0); | |
601 | iowrite32be(NAND_CMD_RESET << IFC_NAND_FCR0_CMD0_SHIFT, | |
602 | &ifc->ifc_nand.nand_fcr0); | |
82771882 PK |
603 | fsl_ifc_run_command(mtd); |
604 | return; | |
605 | ||
606 | default: | |
607 | dev_err(priv->dev, "%s: error, unsupported command 0x%x.\n", | |
608 | __func__, command); | |
609 | } | |
610 | } | |
611 | ||
612 | static void fsl_ifc_select_chip(struct mtd_info *mtd, int chip) | |
613 | { | |
614 | /* The hardware does not seem to support multiple | |
615 | * chips per bank. | |
616 | */ | |
617 | } | |
618 | ||
619 | /* | |
620 | * Write buf to the IFC NAND Controller Data Buffer | |
621 | */ | |
622 | static void fsl_ifc_write_buf(struct mtd_info *mtd, const u8 *buf, int len) | |
623 | { | |
624 | struct nand_chip *chip = mtd->priv; | |
625 | struct fsl_ifc_mtd *priv = chip->priv; | |
626 | unsigned int bufsize = mtd->writesize + mtd->oobsize; | |
627 | ||
628 | if (len <= 0) { | |
629 | dev_err(priv->dev, "%s: len %d bytes", __func__, len); | |
630 | return; | |
631 | } | |
632 | ||
633 | if ((unsigned int)len > bufsize - ifc_nand_ctrl->index) { | |
634 | dev_err(priv->dev, | |
635 | "%s: beyond end of buffer (%d requested, %u available)\n", | |
636 | __func__, len, bufsize - ifc_nand_ctrl->index); | |
637 | len = bufsize - ifc_nand_ctrl->index; | |
638 | } | |
639 | ||
640 | memcpy_toio(&ifc_nand_ctrl->addr[ifc_nand_ctrl->index], buf, len); | |
641 | ifc_nand_ctrl->index += len; | |
642 | } | |
643 | ||
644 | /* | |
645 | * Read a byte from either the IFC hardware buffer | |
646 | * read function for 8-bit buswidth | |
647 | */ | |
648 | static uint8_t fsl_ifc_read_byte(struct mtd_info *mtd) | |
649 | { | |
650 | struct nand_chip *chip = mtd->priv; | |
651 | struct fsl_ifc_mtd *priv = chip->priv; | |
652 | ||
653 | /* | |
654 | * If there are still bytes in the IFC buffer, then use the | |
655 | * next byte. | |
656 | */ | |
657 | if (ifc_nand_ctrl->index < ifc_nand_ctrl->read_bytes) | |
658 | return in_8(&ifc_nand_ctrl->addr[ifc_nand_ctrl->index++]); | |
659 | ||
660 | dev_err(priv->dev, "%s: beyond end of buffer\n", __func__); | |
661 | return ERR_BYTE; | |
662 | } | |
663 | ||
664 | /* | |
665 | * Read two bytes from the IFC hardware buffer | |
666 | * read function for 16-bit buswith | |
667 | */ | |
668 | static uint8_t fsl_ifc_read_byte16(struct mtd_info *mtd) | |
669 | { | |
670 | struct nand_chip *chip = mtd->priv; | |
671 | struct fsl_ifc_mtd *priv = chip->priv; | |
672 | uint16_t data; | |
673 | ||
674 | /* | |
675 | * If there are still bytes in the IFC buffer, then use the | |
676 | * next byte. | |
677 | */ | |
678 | if (ifc_nand_ctrl->index < ifc_nand_ctrl->read_bytes) { | |
2caf87a4 KP |
679 | data = in_be16((uint16_t __iomem *)&ifc_nand_ctrl-> |
680 | addr[ifc_nand_ctrl->index]); | |
82771882 PK |
681 | ifc_nand_ctrl->index += 2; |
682 | return (uint8_t) data; | |
683 | } | |
684 | ||
685 | dev_err(priv->dev, "%s: beyond end of buffer\n", __func__); | |
686 | return ERR_BYTE; | |
687 | } | |
688 | ||
689 | /* | |
690 | * Read from the IFC Controller Data Buffer | |
691 | */ | |
692 | static void fsl_ifc_read_buf(struct mtd_info *mtd, u8 *buf, int len) | |
693 | { | |
694 | struct nand_chip *chip = mtd->priv; | |
695 | struct fsl_ifc_mtd *priv = chip->priv; | |
696 | int avail; | |
697 | ||
698 | if (len < 0) { | |
699 | dev_err(priv->dev, "%s: len %d bytes", __func__, len); | |
700 | return; | |
701 | } | |
702 | ||
703 | avail = min((unsigned int)len, | |
704 | ifc_nand_ctrl->read_bytes - ifc_nand_ctrl->index); | |
705 | memcpy_fromio(buf, &ifc_nand_ctrl->addr[ifc_nand_ctrl->index], avail); | |
706 | ifc_nand_ctrl->index += avail; | |
707 | ||
708 | if (len > avail) | |
709 | dev_err(priv->dev, | |
710 | "%s: beyond end of buffer (%d requested, %d available)\n", | |
711 | __func__, len, avail); | |
712 | } | |
713 | ||
82771882 PK |
714 | /* |
715 | * This function is called after Program and Erase Operations to | |
716 | * check for success or failure. | |
717 | */ | |
718 | static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip) | |
719 | { | |
720 | struct fsl_ifc_mtd *priv = chip->priv; | |
721 | struct fsl_ifc_ctrl *ctrl = priv->ctrl; | |
722 | struct fsl_ifc_regs __iomem *ifc = ctrl->regs; | |
723 | u32 nand_fsr; | |
724 | ||
725 | /* Use READ_STATUS command, but wait for the device to be ready */ | |
0c69fb03 KP |
726 | iowrite32be((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | |
727 | (IFC_FIR_OP_RDSTAT << IFC_NAND_FIR0_OP1_SHIFT), | |
728 | &ifc->ifc_nand.nand_fir0); | |
729 | iowrite32be(NAND_CMD_STATUS << IFC_NAND_FCR0_CMD0_SHIFT, | |
730 | &ifc->ifc_nand.nand_fcr0); | |
731 | iowrite32be(1, &ifc->ifc_nand.nand_fbcr); | |
82771882 PK |
732 | set_addr(mtd, 0, 0, 0); |
733 | ifc_nand_ctrl->read_bytes = 1; | |
734 | ||
735 | fsl_ifc_run_command(mtd); | |
736 | ||
0c69fb03 | 737 | nand_fsr = ioread32be(&ifc->ifc_nand.nand_fsr); |
82771882 PK |
738 | |
739 | /* | |
740 | * The chip always seems to report that it is | |
741 | * write-protected, even when it is not. | |
742 | */ | |
743 | return nand_fsr | NAND_STATUS_WP; | |
744 | } | |
745 | ||
1fbb938d BN |
746 | static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip, |
747 | uint8_t *buf, int oob_required, int page) | |
82771882 PK |
748 | { |
749 | struct fsl_ifc_mtd *priv = chip->priv; | |
750 | struct fsl_ifc_ctrl *ctrl = priv->ctrl; | |
3f91e94f | 751 | struct fsl_ifc_nand_ctrl *nctrl = ifc_nand_ctrl; |
82771882 PK |
752 | |
753 | fsl_ifc_read_buf(mtd, buf, mtd->writesize); | |
a6976cdf BN |
754 | if (oob_required) |
755 | fsl_ifc_read_buf(mtd, chip->oob_poi, mtd->oobsize); | |
82771882 PK |
756 | |
757 | if (ctrl->nand_stat & IFC_NAND_EVTER_STAT_ECCER) | |
758 | dev_err(priv->dev, "NAND Flash ECC Uncorrectable Error\n"); | |
759 | ||
760 | if (ctrl->nand_stat != IFC_NAND_EVTER_STAT_OPC) | |
761 | mtd->ecc_stats.failed++; | |
762 | ||
3f91e94f | 763 | return nctrl->max_bitflips; |
82771882 PK |
764 | } |
765 | ||
766 | /* ECC will be calculated automatically, and errors will be detected in | |
767 | * waitfunc. | |
768 | */ | |
fdbad98d | 769 | static int fsl_ifc_write_page(struct mtd_info *mtd, struct nand_chip *chip, |
1fbb938d | 770 | const uint8_t *buf, int oob_required) |
82771882 PK |
771 | { |
772 | fsl_ifc_write_buf(mtd, buf, mtd->writesize); | |
773 | fsl_ifc_write_buf(mtd, chip->oob_poi, mtd->oobsize); | |
fdbad98d JW |
774 | |
775 | return 0; | |
82771882 PK |
776 | } |
777 | ||
778 | static int fsl_ifc_chip_init_tail(struct mtd_info *mtd) | |
779 | { | |
780 | struct nand_chip *chip = mtd->priv; | |
781 | struct fsl_ifc_mtd *priv = chip->priv; | |
782 | ||
783 | dev_dbg(priv->dev, "%s: nand->numchips = %d\n", __func__, | |
784 | chip->numchips); | |
785 | dev_dbg(priv->dev, "%s: nand->chipsize = %lld\n", __func__, | |
786 | chip->chipsize); | |
787 | dev_dbg(priv->dev, "%s: nand->pagemask = %8x\n", __func__, | |
788 | chip->pagemask); | |
789 | dev_dbg(priv->dev, "%s: nand->chip_delay = %d\n", __func__, | |
790 | chip->chip_delay); | |
791 | dev_dbg(priv->dev, "%s: nand->badblockpos = %d\n", __func__, | |
792 | chip->badblockpos); | |
793 | dev_dbg(priv->dev, "%s: nand->chip_shift = %d\n", __func__, | |
794 | chip->chip_shift); | |
795 | dev_dbg(priv->dev, "%s: nand->page_shift = %d\n", __func__, | |
796 | chip->page_shift); | |
797 | dev_dbg(priv->dev, "%s: nand->phys_erase_shift = %d\n", __func__, | |
798 | chip->phys_erase_shift); | |
82771882 PK |
799 | dev_dbg(priv->dev, "%s: nand->ecc.mode = %d\n", __func__, |
800 | chip->ecc.mode); | |
801 | dev_dbg(priv->dev, "%s: nand->ecc.steps = %d\n", __func__, | |
802 | chip->ecc.steps); | |
803 | dev_dbg(priv->dev, "%s: nand->ecc.bytes = %d\n", __func__, | |
804 | chip->ecc.bytes); | |
805 | dev_dbg(priv->dev, "%s: nand->ecc.total = %d\n", __func__, | |
806 | chip->ecc.total); | |
807 | dev_dbg(priv->dev, "%s: nand->ecc.layout = %p\n", __func__, | |
808 | chip->ecc.layout); | |
809 | dev_dbg(priv->dev, "%s: mtd->flags = %08x\n", __func__, mtd->flags); | |
810 | dev_dbg(priv->dev, "%s: mtd->size = %lld\n", __func__, mtd->size); | |
811 | dev_dbg(priv->dev, "%s: mtd->erasesize = %d\n", __func__, | |
812 | mtd->erasesize); | |
813 | dev_dbg(priv->dev, "%s: mtd->writesize = %d\n", __func__, | |
814 | mtd->writesize); | |
815 | dev_dbg(priv->dev, "%s: mtd->oobsize = %d\n", __func__, | |
816 | mtd->oobsize); | |
817 | ||
818 | return 0; | |
819 | } | |
820 | ||
10bfa766 PK |
821 | static void fsl_ifc_sram_init(struct fsl_ifc_mtd *priv) |
822 | { | |
823 | struct fsl_ifc_ctrl *ctrl = priv->ctrl; | |
824 | struct fsl_ifc_regs __iomem *ifc = ctrl->regs; | |
825 | uint32_t csor = 0, csor_8k = 0, csor_ext = 0; | |
826 | uint32_t cs = priv->bank; | |
827 | ||
828 | /* Save CSOR and CSOR_ext */ | |
0c69fb03 KP |
829 | csor = ioread32be(&ifc->csor_cs[cs].csor); |
830 | csor_ext = ioread32be(&ifc->csor_cs[cs].csor_ext); | |
10bfa766 PK |
831 | |
832 | /* chage PageSize 8K and SpareSize 1K*/ | |
833 | csor_8k = (csor & ~(CSOR_NAND_PGS_MASK)) | 0x0018C000; | |
0c69fb03 KP |
834 | iowrite32be(csor_8k, &ifc->csor_cs[cs].csor); |
835 | iowrite32be(0x0000400, &ifc->csor_cs[cs].csor_ext); | |
10bfa766 PK |
836 | |
837 | /* READID */ | |
0c69fb03 KP |
838 | iowrite32be((IFC_FIR_OP_CW0 << IFC_NAND_FIR0_OP0_SHIFT) | |
839 | (IFC_FIR_OP_UA << IFC_NAND_FIR0_OP1_SHIFT) | | |
840 | (IFC_FIR_OP_RB << IFC_NAND_FIR0_OP2_SHIFT), | |
841 | &ifc->ifc_nand.nand_fir0); | |
842 | iowrite32be(NAND_CMD_READID << IFC_NAND_FCR0_CMD0_SHIFT, | |
843 | &ifc->ifc_nand.nand_fcr0); | |
844 | iowrite32be(0x0, &ifc->ifc_nand.row3); | |
10bfa766 | 845 | |
0c69fb03 | 846 | iowrite32be(0x0, &ifc->ifc_nand.nand_fbcr); |
10bfa766 PK |
847 | |
848 | /* Program ROW0/COL0 */ | |
0c69fb03 KP |
849 | iowrite32be(0x0, &ifc->ifc_nand.row0); |
850 | iowrite32be(0x0, &ifc->ifc_nand.col0); | |
10bfa766 PK |
851 | |
852 | /* set the chip select for NAND Transaction */ | |
0c69fb03 | 853 | iowrite32be(cs << IFC_NAND_CSEL_SHIFT, &ifc->ifc_nand.nand_csel); |
10bfa766 PK |
854 | |
855 | /* start read seq */ | |
0c69fb03 | 856 | iowrite32be(IFC_NAND_SEQ_STRT_FIR_STRT, &ifc->ifc_nand.nandseq_strt); |
10bfa766 PK |
857 | |
858 | /* wait for command complete flag or timeout */ | |
859 | wait_event_timeout(ctrl->nand_wait, ctrl->nand_stat, | |
860 | IFC_TIMEOUT_MSECS * HZ/1000); | |
861 | ||
862 | if (ctrl->nand_stat != IFC_NAND_EVTER_STAT_OPC) | |
863 | printk(KERN_ERR "fsl-ifc: Failed to Initialise SRAM\n"); | |
864 | ||
865 | /* Restore CSOR and CSOR_ext */ | |
0c69fb03 KP |
866 | iowrite32be(csor, &ifc->csor_cs[cs].csor); |
867 | iowrite32be(csor_ext, &ifc->csor_cs[cs].csor_ext); | |
10bfa766 PK |
868 | } |
869 | ||
82771882 PK |
870 | static int fsl_ifc_chip_init(struct fsl_ifc_mtd *priv) |
871 | { | |
872 | struct fsl_ifc_ctrl *ctrl = priv->ctrl; | |
873 | struct fsl_ifc_regs __iomem *ifc = ctrl->regs; | |
874 | struct nand_chip *chip = &priv->chip; | |
875 | struct nand_ecclayout *layout; | |
10bfa766 | 876 | u32 csor, ver; |
82771882 PK |
877 | |
878 | /* Fill in fsl_ifc_mtd structure */ | |
879 | priv->mtd.priv = chip; | |
880 | priv->mtd.owner = THIS_MODULE; | |
881 | ||
882 | /* fill in nand_chip structure */ | |
883 | /* set up function call table */ | |
0c69fb03 | 884 | if ((ioread32be(&ifc->cspr_cs[priv->bank].cspr)) & CSPR_PORT_SIZE_16) |
82771882 PK |
885 | chip->read_byte = fsl_ifc_read_byte16; |
886 | else | |
887 | chip->read_byte = fsl_ifc_read_byte; | |
888 | ||
889 | chip->write_buf = fsl_ifc_write_buf; | |
890 | chip->read_buf = fsl_ifc_read_buf; | |
82771882 PK |
891 | chip->select_chip = fsl_ifc_select_chip; |
892 | chip->cmdfunc = fsl_ifc_cmdfunc; | |
893 | chip->waitfunc = fsl_ifc_wait; | |
894 | ||
895 | chip->bbt_td = &bbt_main_descr; | |
896 | chip->bbt_md = &bbt_mirror_descr; | |
897 | ||
0c69fb03 | 898 | iowrite32be(0x0, &ifc->ifc_nand.ncfgr); |
82771882 PK |
899 | |
900 | /* set up nand options */ | |
82771882 | 901 | chip->bbt_options = NAND_BBT_USE_FLASH; |
20cd0008 | 902 | chip->options = NAND_NO_SUBPAGE_WRITE; |
82771882 | 903 | |
0c69fb03 | 904 | if (ioread32be(&ifc->cspr_cs[priv->bank].cspr) & CSPR_PORT_SIZE_16) { |
82771882 PK |
905 | chip->read_byte = fsl_ifc_read_byte16; |
906 | chip->options |= NAND_BUSWIDTH_16; | |
907 | } else { | |
908 | chip->read_byte = fsl_ifc_read_byte; | |
909 | } | |
910 | ||
911 | chip->controller = &ifc_nand_ctrl->controller; | |
912 | chip->priv = priv; | |
913 | ||
914 | chip->ecc.read_page = fsl_ifc_read_page; | |
915 | chip->ecc.write_page = fsl_ifc_write_page; | |
916 | ||
0c69fb03 | 917 | csor = ioread32be(&ifc->csor_cs[priv->bank].csor); |
82771882 PK |
918 | |
919 | /* Hardware generates ECC per 512 Bytes */ | |
920 | chip->ecc.size = 512; | |
921 | chip->ecc.bytes = 8; | |
44df4d11 | 922 | chip->ecc.strength = 4; |
82771882 PK |
923 | |
924 | switch (csor & CSOR_NAND_PGS_MASK) { | |
925 | case CSOR_NAND_PGS_512: | |
926 | if (chip->options & NAND_BUSWIDTH_16) { | |
927 | layout = &oob_512_16bit_ecc4; | |
928 | } else { | |
929 | layout = &oob_512_8bit_ecc4; | |
930 | ||
931 | /* Avoid conflict with bad block marker */ | |
932 | bbt_main_descr.offs = 0; | |
933 | bbt_mirror_descr.offs = 0; | |
934 | } | |
935 | ||
936 | priv->bufnum_mask = 15; | |
937 | break; | |
938 | ||
939 | case CSOR_NAND_PGS_2K: | |
940 | layout = &oob_2048_ecc4; | |
941 | priv->bufnum_mask = 3; | |
942 | break; | |
943 | ||
944 | case CSOR_NAND_PGS_4K: | |
945 | if ((csor & CSOR_NAND_ECC_MODE_MASK) == | |
946 | CSOR_NAND_ECC_MODE_4) { | |
947 | layout = &oob_4096_ecc4; | |
948 | } else { | |
949 | layout = &oob_4096_ecc8; | |
950 | chip->ecc.bytes = 16; | |
ebff90b2 | 951 | chip->ecc.strength = 8; |
82771882 PK |
952 | } |
953 | ||
954 | priv->bufnum_mask = 1; | |
955 | break; | |
956 | ||
ebff90b2 PK |
957 | case CSOR_NAND_PGS_8K: |
958 | if ((csor & CSOR_NAND_ECC_MODE_MASK) == | |
959 | CSOR_NAND_ECC_MODE_4) { | |
960 | layout = &oob_8192_ecc4; | |
961 | } else { | |
962 | layout = &oob_8192_ecc8; | |
963 | chip->ecc.bytes = 16; | |
964 | chip->ecc.strength = 8; | |
965 | } | |
966 | ||
967 | priv->bufnum_mask = 0; | |
968 | break; | |
969 | ||
82771882 PK |
970 | default: |
971 | dev_err(priv->dev, "bad csor %#x: bad page size\n", csor); | |
972 | return -ENODEV; | |
973 | } | |
974 | ||
975 | /* Must also set CSOR_NAND_ECC_ENC_EN if DEC_EN set */ | |
976 | if (csor & CSOR_NAND_ECC_DEC_EN) { | |
977 | chip->ecc.mode = NAND_ECC_HW; | |
978 | chip->ecc.layout = layout; | |
979 | } else { | |
980 | chip->ecc.mode = NAND_ECC_SOFT; | |
981 | } | |
982 | ||
0c69fb03 | 983 | ver = ioread32be(&ifc->ifc_rev); |
10bfa766 PK |
984 | if (ver == FSL_IFC_V1_1_0) |
985 | fsl_ifc_sram_init(priv); | |
986 | ||
82771882 PK |
987 | return 0; |
988 | } | |
989 | ||
990 | static int fsl_ifc_chip_remove(struct fsl_ifc_mtd *priv) | |
991 | { | |
992 | nand_release(&priv->mtd); | |
993 | ||
994 | kfree(priv->mtd.name); | |
995 | ||
996 | if (priv->vbase) | |
997 | iounmap(priv->vbase); | |
998 | ||
999 | ifc_nand_ctrl->chips[priv->bank] = NULL; | |
82771882 PK |
1000 | |
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | static int match_bank(struct fsl_ifc_regs __iomem *ifc, int bank, | |
1005 | phys_addr_t addr) | |
1006 | { | |
0c69fb03 | 1007 | u32 cspr = ioread32be(&ifc->cspr_cs[bank].cspr); |
82771882 PK |
1008 | |
1009 | if (!(cspr & CSPR_V)) | |
1010 | return 0; | |
1011 | if ((cspr & CSPR_MSEL) != CSPR_MSEL_NAND) | |
1012 | return 0; | |
1013 | ||
1014 | return (cspr & CSPR_BA) == convert_ifc_address(addr); | |
1015 | } | |
1016 | ||
1017 | static DEFINE_MUTEX(fsl_ifc_nand_mutex); | |
1018 | ||
06f25510 | 1019 | static int fsl_ifc_nand_probe(struct platform_device *dev) |
82771882 PK |
1020 | { |
1021 | struct fsl_ifc_regs __iomem *ifc; | |
1022 | struct fsl_ifc_mtd *priv; | |
1023 | struct resource res; | |
1024 | static const char *part_probe_types[] | |
1025 | = { "cmdlinepart", "RedBoot", "ofpart", NULL }; | |
1026 | int ret; | |
1027 | int bank; | |
1028 | struct device_node *node = dev->dev.of_node; | |
1029 | struct mtd_part_parser_data ppdata; | |
1030 | ||
1031 | ppdata.of_node = dev->dev.of_node; | |
1032 | if (!fsl_ifc_ctrl_dev || !fsl_ifc_ctrl_dev->regs) | |
1033 | return -ENODEV; | |
1034 | ifc = fsl_ifc_ctrl_dev->regs; | |
1035 | ||
1036 | /* get, allocate and map the memory resource */ | |
1037 | ret = of_address_to_resource(node, 0, &res); | |
1038 | if (ret) { | |
1039 | dev_err(&dev->dev, "%s: failed to get resource\n", __func__); | |
1040 | return ret; | |
1041 | } | |
1042 | ||
1043 | /* find which chip select it is connected to */ | |
1044 | for (bank = 0; bank < FSL_IFC_BANK_COUNT; bank++) { | |
1045 | if (match_bank(ifc, bank, res.start)) | |
1046 | break; | |
1047 | } | |
1048 | ||
1049 | if (bank >= FSL_IFC_BANK_COUNT) { | |
1050 | dev_err(&dev->dev, "%s: address did not match any chip selects\n", | |
1051 | __func__); | |
1052 | return -ENODEV; | |
1053 | } | |
1054 | ||
1055 | priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL); | |
1056 | if (!priv) | |
1057 | return -ENOMEM; | |
1058 | ||
1059 | mutex_lock(&fsl_ifc_nand_mutex); | |
1060 | if (!fsl_ifc_ctrl_dev->nand) { | |
1061 | ifc_nand_ctrl = kzalloc(sizeof(*ifc_nand_ctrl), GFP_KERNEL); | |
1062 | if (!ifc_nand_ctrl) { | |
82771882 PK |
1063 | mutex_unlock(&fsl_ifc_nand_mutex); |
1064 | return -ENOMEM; | |
1065 | } | |
1066 | ||
1067 | ifc_nand_ctrl->read_bytes = 0; | |
1068 | ifc_nand_ctrl->index = 0; | |
1069 | ifc_nand_ctrl->addr = NULL; | |
1070 | fsl_ifc_ctrl_dev->nand = ifc_nand_ctrl; | |
1071 | ||
1072 | spin_lock_init(&ifc_nand_ctrl->controller.lock); | |
1073 | init_waitqueue_head(&ifc_nand_ctrl->controller.wq); | |
1074 | } else { | |
1075 | ifc_nand_ctrl = fsl_ifc_ctrl_dev->nand; | |
1076 | } | |
1077 | mutex_unlock(&fsl_ifc_nand_mutex); | |
1078 | ||
1079 | ifc_nand_ctrl->chips[bank] = priv; | |
1080 | priv->bank = bank; | |
1081 | priv->ctrl = fsl_ifc_ctrl_dev; | |
1082 | priv->dev = &dev->dev; | |
1083 | ||
1084 | priv->vbase = ioremap(res.start, resource_size(&res)); | |
1085 | if (!priv->vbase) { | |
1086 | dev_err(priv->dev, "%s: failed to map chip region\n", __func__); | |
1087 | ret = -ENOMEM; | |
1088 | goto err; | |
1089 | } | |
1090 | ||
1091 | dev_set_drvdata(priv->dev, priv); | |
1092 | ||
0c69fb03 KP |
1093 | iowrite32be(IFC_NAND_EVTER_EN_OPC_EN | |
1094 | IFC_NAND_EVTER_EN_FTOER_EN | | |
1095 | IFC_NAND_EVTER_EN_WPER_EN, | |
1096 | &ifc->ifc_nand.nand_evter_en); | |
82771882 PK |
1097 | |
1098 | /* enable NAND Machine Interrupts */ | |
0c69fb03 KP |
1099 | iowrite32be(IFC_NAND_EVTER_INTR_OPCIR_EN | |
1100 | IFC_NAND_EVTER_INTR_FTOERIR_EN | | |
1101 | IFC_NAND_EVTER_INTR_WPERIR_EN, | |
1102 | &ifc->ifc_nand.nand_evter_intr_en); | |
2fec386a | 1103 | priv->mtd.name = kasprintf(GFP_KERNEL, "%llx.flash", (u64)res.start); |
82771882 PK |
1104 | if (!priv->mtd.name) { |
1105 | ret = -ENOMEM; | |
1106 | goto err; | |
1107 | } | |
1108 | ||
1109 | ret = fsl_ifc_chip_init(priv); | |
1110 | if (ret) | |
1111 | goto err; | |
1112 | ||
1113 | ret = nand_scan_ident(&priv->mtd, 1, NULL); | |
1114 | if (ret) | |
1115 | goto err; | |
1116 | ||
1117 | ret = fsl_ifc_chip_init_tail(&priv->mtd); | |
1118 | if (ret) | |
1119 | goto err; | |
1120 | ||
1121 | ret = nand_scan_tail(&priv->mtd); | |
1122 | if (ret) | |
1123 | goto err; | |
1124 | ||
1125 | /* First look for RedBoot table or partitions on the command | |
1126 | * line, these take precedence over device tree information */ | |
1127 | mtd_device_parse_register(&priv->mtd, part_probe_types, &ppdata, | |
1128 | NULL, 0); | |
1129 | ||
1130 | dev_info(priv->dev, "IFC NAND device at 0x%llx, bank %d\n", | |
1131 | (unsigned long long)res.start, priv->bank); | |
1132 | return 0; | |
1133 | ||
1134 | err: | |
1135 | fsl_ifc_chip_remove(priv); | |
1136 | return ret; | |
1137 | } | |
1138 | ||
1139 | static int fsl_ifc_nand_remove(struct platform_device *dev) | |
1140 | { | |
1141 | struct fsl_ifc_mtd *priv = dev_get_drvdata(&dev->dev); | |
1142 | ||
1143 | fsl_ifc_chip_remove(priv); | |
1144 | ||
1145 | mutex_lock(&fsl_ifc_nand_mutex); | |
1146 | ifc_nand_ctrl->counter--; | |
1147 | if (!ifc_nand_ctrl->counter) { | |
1148 | fsl_ifc_ctrl_dev->nand = NULL; | |
1149 | kfree(ifc_nand_ctrl); | |
1150 | } | |
1151 | mutex_unlock(&fsl_ifc_nand_mutex); | |
1152 | ||
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | static const struct of_device_id fsl_ifc_nand_match[] = { | |
1157 | { | |
1158 | .compatible = "fsl,ifc-nand", | |
1159 | }, | |
1160 | {} | |
1161 | }; | |
1162 | ||
1163 | static struct platform_driver fsl_ifc_nand_driver = { | |
1164 | .driver = { | |
1165 | .name = "fsl,ifc-nand", | |
1166 | .owner = THIS_MODULE, | |
1167 | .of_match_table = fsl_ifc_nand_match, | |
1168 | }, | |
1169 | .probe = fsl_ifc_nand_probe, | |
1170 | .remove = fsl_ifc_nand_remove, | |
1171 | }; | |
1172 | ||
c69ad0ef | 1173 | module_platform_driver(fsl_ifc_nand_driver); |
82771882 PK |
1174 | |
1175 | MODULE_LICENSE("GPL"); | |
1176 | MODULE_AUTHOR("Freescale"); | |
1177 | MODULE_DESCRIPTION("Freescale Integrated Flash Controller MTD NAND driver"); |