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Commit | Line | Data |
---|---|---|
c9ac5977 | 1 | /* |
fbad5696 | 2 | * Driver for One Laptop Per Child ‘CAFÉ’ controller, aka Marvell 88ALP01 |
5467fb02 | 3 | * |
514fca43 | 4 | * The data sheet for this device can be found at: |
631dd1a8 | 5 | * http://wiki.laptop.org/go/Datasheets |
514fca43 | 6 | * |
5467fb02 DW |
7 | * Copyright © 2006 Red Hat, Inc. |
8 | * Copyright © 2006 David Woodhouse <dwmw2@infradead.org> | |
9 | */ | |
10 | ||
8dd851de | 11 | #define DEBUG |
5467fb02 DW |
12 | |
13 | #include <linux/device.h> | |
14 | #undef DEBUG | |
15 | #include <linux/mtd/mtd.h> | |
16 | #include <linux/mtd/nand.h> | |
9c37f332 | 17 | #include <linux/mtd/partitions.h> |
8c61b7a7 | 18 | #include <linux/rslib.h> |
5467fb02 DW |
19 | #include <linux/pci.h> |
20 | #include <linux/delay.h> | |
21 | #include <linux/interrupt.h> | |
a1274302 | 22 | #include <linux/dma-mapping.h> |
5a0e3ad6 | 23 | #include <linux/slab.h> |
5467fb02 DW |
24 | #include <asm/io.h> |
25 | ||
26 | #define CAFE_NAND_CTRL1 0x00 | |
27 | #define CAFE_NAND_CTRL2 0x04 | |
28 | #define CAFE_NAND_CTRL3 0x08 | |
29 | #define CAFE_NAND_STATUS 0x0c | |
30 | #define CAFE_NAND_IRQ 0x10 | |
31 | #define CAFE_NAND_IRQ_MASK 0x14 | |
32 | #define CAFE_NAND_DATA_LEN 0x18 | |
33 | #define CAFE_NAND_ADDR1 0x1c | |
34 | #define CAFE_NAND_ADDR2 0x20 | |
35 | #define CAFE_NAND_TIMING1 0x24 | |
36 | #define CAFE_NAND_TIMING2 0x28 | |
37 | #define CAFE_NAND_TIMING3 0x2c | |
38 | #define CAFE_NAND_NONMEM 0x30 | |
04459d7c | 39 | #define CAFE_NAND_ECC_RESULT 0x3C |
fbad5696 DW |
40 | #define CAFE_NAND_DMA_CTRL 0x40 |
41 | #define CAFE_NAND_DMA_ADDR0 0x44 | |
42 | #define CAFE_NAND_DMA_ADDR1 0x48 | |
04459d7c DW |
43 | #define CAFE_NAND_ECC_SYN01 0x50 |
44 | #define CAFE_NAND_ECC_SYN23 0x54 | |
45 | #define CAFE_NAND_ECC_SYN45 0x58 | |
46 | #define CAFE_NAND_ECC_SYN67 0x5c | |
5467fb02 DW |
47 | #define CAFE_NAND_READ_DATA 0x1000 |
48 | #define CAFE_NAND_WRITE_DATA 0x2000 | |
49 | ||
195a253b DW |
50 | #define CAFE_GLOBAL_CTRL 0x3004 |
51 | #define CAFE_GLOBAL_IRQ 0x3008 | |
52 | #define CAFE_GLOBAL_IRQ_MASK 0x300c | |
53 | #define CAFE_NAND_RESET 0x3034 | |
54 | ||
048c37b4 DW |
55 | /* Missing from the datasheet: bit 19 of CTRL1 sets CE0 vs. CE1 */ |
56 | #define CTRL1_CHIPSELECT (1<<19) | |
57 | ||
5467fb02 DW |
58 | struct cafe_priv { |
59 | struct nand_chip nand; | |
9c37f332 | 60 | struct mtd_partition *parts; |
5467fb02 DW |
61 | struct pci_dev *pdev; |
62 | void __iomem *mmio; | |
8c61b7a7 | 63 | struct rs_control *rs; |
5467fb02 DW |
64 | uint32_t ctl1; |
65 | uint32_t ctl2; | |
66 | int datalen; | |
67 | int nr_data; | |
68 | int data_pos; | |
69 | int page_addr; | |
70 | dma_addr_t dmaaddr; | |
71 | unsigned char *dmabuf; | |
5467fb02 DW |
72 | }; |
73 | ||
b478c775 | 74 | static int usedma = 1; |
5467fb02 DW |
75 | module_param(usedma, int, 0644); |
76 | ||
8dd851de DW |
77 | static int skipbbt = 0; |
78 | module_param(skipbbt, int, 0644); | |
79 | ||
80 | static int debug = 0; | |
81 | module_param(debug, int, 0644); | |
82 | ||
be8444bd DW |
83 | static int regdebug = 0; |
84 | module_param(regdebug, int, 0644); | |
85 | ||
b478c775 | 86 | static int checkecc = 1; |
470b0a90 DW |
87 | module_param(checkecc, int, 0644); |
88 | ||
64a6f950 | 89 | static unsigned int numtimings; |
527a4f45 DW |
90 | static int timing[3]; |
91 | module_param_array(timing, int, &numtimings, 0644); | |
b478c775 | 92 | |
68874414 | 93 | static const char *part_probes[] = { "cmdlinepart", "RedBoot", NULL }; |
9c37f332 | 94 | |
04459d7c | 95 | /* Hrm. Why isn't this already conditional on something in the struct device? */ |
8dd851de DW |
96 | #define cafe_dev_dbg(dev, args...) do { if (debug) dev_dbg(dev, ##args); } while(0) |
97 | ||
195a253b DW |
98 | /* Make it easier to switch to PIO if we need to */ |
99 | #define cafe_readl(cafe, addr) readl((cafe)->mmio + CAFE_##addr) | |
100 | #define cafe_writel(cafe, datum, addr) writel(datum, (cafe)->mmio + CAFE_##addr) | |
8dd851de | 101 | |
5467fb02 DW |
102 | static int cafe_device_ready(struct mtd_info *mtd) |
103 | { | |
104 | struct cafe_priv *cafe = mtd->priv; | |
195a253b DW |
105 | int result = !!(cafe_readl(cafe, NAND_STATUS) | 0x40000000); |
106 | uint32_t irqs = cafe_readl(cafe, NAND_IRQ); | |
fbad5696 | 107 | |
195a253b | 108 | cafe_writel(cafe, irqs, NAND_IRQ); |
fbad5696 | 109 | |
8dd851de | 110 | cafe_dev_dbg(&cafe->pdev->dev, "NAND device is%s ready, IRQ %x (%x) (%x,%x)\n", |
195a253b DW |
111 | result?"":" not", irqs, cafe_readl(cafe, NAND_IRQ), |
112 | cafe_readl(cafe, GLOBAL_IRQ), cafe_readl(cafe, GLOBAL_IRQ_MASK)); | |
fbad5696 | 113 | |
5467fb02 DW |
114 | return result; |
115 | } | |
116 | ||
117 | ||
118 | static void cafe_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) | |
119 | { | |
120 | struct cafe_priv *cafe = mtd->priv; | |
121 | ||
122 | if (usedma) | |
123 | memcpy(cafe->dmabuf + cafe->datalen, buf, len); | |
124 | else | |
125 | memcpy_toio(cafe->mmio + CAFE_NAND_WRITE_DATA + cafe->datalen, buf, len); | |
fbad5696 | 126 | |
5467fb02 DW |
127 | cafe->datalen += len; |
128 | ||
8dd851de | 129 | cafe_dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes to write buffer. datalen 0x%x\n", |
5467fb02 DW |
130 | len, cafe->datalen); |
131 | } | |
132 | ||
133 | static void cafe_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) | |
134 | { | |
135 | struct cafe_priv *cafe = mtd->priv; | |
136 | ||
137 | if (usedma) | |
138 | memcpy(buf, cafe->dmabuf + cafe->datalen, len); | |
139 | else | |
140 | memcpy_fromio(buf, cafe->mmio + CAFE_NAND_READ_DATA + cafe->datalen, len); | |
141 | ||
8dd851de | 142 | cafe_dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes from position 0x%x in read buffer.\n", |
5467fb02 DW |
143 | len, cafe->datalen); |
144 | cafe->datalen += len; | |
145 | } | |
146 | ||
147 | static uint8_t cafe_read_byte(struct mtd_info *mtd) | |
148 | { | |
149 | struct cafe_priv *cafe = mtd->priv; | |
150 | uint8_t d; | |
151 | ||
152 | cafe_read_buf(mtd, &d, 1); | |
8dd851de | 153 | cafe_dev_dbg(&cafe->pdev->dev, "Read %02x\n", d); |
5467fb02 DW |
154 | |
155 | return d; | |
156 | } | |
157 | ||
158 | static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, | |
159 | int column, int page_addr) | |
160 | { | |
161 | struct cafe_priv *cafe = mtd->priv; | |
162 | int adrbytes = 0; | |
163 | uint32_t ctl1; | |
164 | uint32_t doneint = 0x80000000; | |
5467fb02 | 165 | |
8dd851de | 166 | cafe_dev_dbg(&cafe->pdev->dev, "cmdfunc %02x, 0x%x, 0x%x\n", |
5467fb02 DW |
167 | command, column, page_addr); |
168 | ||
169 | if (command == NAND_CMD_ERASE2 || command == NAND_CMD_PAGEPROG) { | |
170 | /* Second half of a command we already calculated */ | |
195a253b | 171 | cafe_writel(cafe, cafe->ctl2 | 0x100 | command, NAND_CTRL2); |
5467fb02 | 172 | ctl1 = cafe->ctl1; |
cad40654 | 173 | cafe->ctl2 &= ~(1<<30); |
8dd851de | 174 | cafe_dev_dbg(&cafe->pdev->dev, "Continue command, ctl1 %08x, #data %d\n", |
5467fb02 DW |
175 | cafe->ctl1, cafe->nr_data); |
176 | goto do_command; | |
177 | } | |
178 | /* Reset ECC engine */ | |
195a253b | 179 | cafe_writel(cafe, 0, NAND_CTRL2); |
5467fb02 DW |
180 | |
181 | /* Emulate NAND_CMD_READOOB on large-page chips */ | |
182 | if (mtd->writesize > 512 && | |
183 | command == NAND_CMD_READOOB) { | |
184 | column += mtd->writesize; | |
185 | command = NAND_CMD_READ0; | |
186 | } | |
187 | ||
188 | /* FIXME: Do we need to send read command before sending data | |
189 | for small-page chips, to position the buffer correctly? */ | |
190 | ||
191 | if (column != -1) { | |
195a253b | 192 | cafe_writel(cafe, column, NAND_ADDR1); |
5467fb02 DW |
193 | adrbytes = 2; |
194 | if (page_addr != -1) | |
195 | goto write_adr2; | |
196 | } else if (page_addr != -1) { | |
195a253b | 197 | cafe_writel(cafe, page_addr & 0xffff, NAND_ADDR1); |
5467fb02 DW |
198 | page_addr >>= 16; |
199 | write_adr2: | |
195a253b | 200 | cafe_writel(cafe, page_addr, NAND_ADDR2); |
5467fb02 DW |
201 | adrbytes += 2; |
202 | if (mtd->size > mtd->writesize << 16) | |
203 | adrbytes++; | |
204 | } | |
205 | ||
206 | cafe->data_pos = cafe->datalen = 0; | |
207 | ||
048c37b4 DW |
208 | /* Set command valid bit, mask in the chip select bit */ |
209 | ctl1 = 0x80000000 | command | (cafe->ctl1 & CTRL1_CHIPSELECT); | |
5467fb02 DW |
210 | |
211 | /* Set RD or WR bits as appropriate */ | |
212 | if (command == NAND_CMD_READID || command == NAND_CMD_STATUS) { | |
213 | ctl1 |= (1<<26); /* rd */ | |
214 | /* Always 5 bytes, for now */ | |
8dd851de | 215 | cafe->datalen = 4; |
5467fb02 DW |
216 | /* And one address cycle -- even for STATUS, since the controller doesn't work without */ |
217 | adrbytes = 1; | |
218 | } else if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || | |
219 | command == NAND_CMD_READOOB || command == NAND_CMD_RNDOUT) { | |
220 | ctl1 |= 1<<26; /* rd */ | |
221 | /* For now, assume just read to end of page */ | |
222 | cafe->datalen = mtd->writesize + mtd->oobsize - column; | |
223 | } else if (command == NAND_CMD_SEQIN) | |
224 | ctl1 |= 1<<25; /* wr */ | |
225 | ||
226 | /* Set number of address bytes */ | |
227 | if (adrbytes) | |
228 | ctl1 |= ((adrbytes-1)|8) << 27; | |
229 | ||
230 | if (command == NAND_CMD_SEQIN || command == NAND_CMD_ERASE1) { | |
c9ac5977 | 231 | /* Ignore the first command of a pair; the hardware |
5467fb02 DW |
232 | deals with them both at once, later */ |
233 | cafe->ctl1 = ctl1; | |
8dd851de | 234 | cafe_dev_dbg(&cafe->pdev->dev, "Setup for delayed command, ctl1 %08x, dlen %x\n", |
5467fb02 DW |
235 | cafe->ctl1, cafe->datalen); |
236 | return; | |
237 | } | |
238 | /* RNDOUT and READ0 commands need a following byte */ | |
239 | if (command == NAND_CMD_RNDOUT) | |
195a253b | 240 | cafe_writel(cafe, cafe->ctl2 | 0x100 | NAND_CMD_RNDOUTSTART, NAND_CTRL2); |
5467fb02 | 241 | else if (command == NAND_CMD_READ0 && mtd->writesize > 512) |
195a253b | 242 | cafe_writel(cafe, cafe->ctl2 | 0x100 | NAND_CMD_READSTART, NAND_CTRL2); |
5467fb02 DW |
243 | |
244 | do_command: | |
c9ac5977 | 245 | cafe_dev_dbg(&cafe->pdev->dev, "dlen %x, ctl1 %x, ctl2 %x\n", |
195a253b | 246 | cafe->datalen, ctl1, cafe_readl(cafe, NAND_CTRL2)); |
fbad5696 | 247 | |
5467fb02 | 248 | /* NB: The datasheet lies -- we really should be subtracting 1 here */ |
195a253b DW |
249 | cafe_writel(cafe, cafe->datalen, NAND_DATA_LEN); |
250 | cafe_writel(cafe, 0x90000000, NAND_IRQ); | |
5467fb02 DW |
251 | if (usedma && (ctl1 & (3<<25))) { |
252 | uint32_t dmactl = 0xc0000000 + cafe->datalen; | |
253 | /* If WR or RD bits set, set up DMA */ | |
254 | if (ctl1 & (1<<26)) { | |
255 | /* It's a read */ | |
256 | dmactl |= (1<<29); | |
257 | /* ... so it's done when the DMA is done, not just | |
258 | the command. */ | |
259 | doneint = 0x10000000; | |
260 | } | |
195a253b | 261 | cafe_writel(cafe, dmactl, NAND_DMA_CTRL); |
5467fb02 | 262 | } |
5467fb02 DW |
263 | cafe->datalen = 0; |
264 | ||
be8444bd DW |
265 | if (unlikely(regdebug)) { |
266 | int i; | |
267 | printk("About to write command %08x to register 0\n", ctl1); | |
268 | for (i=4; i< 0x5c; i+=4) | |
269 | printk("Register %x: %08x\n", i, readl(cafe->mmio + i)); | |
fbad5696 | 270 | } |
be8444bd | 271 | |
195a253b | 272 | cafe_writel(cafe, ctl1, NAND_CTRL1); |
5467fb02 DW |
273 | /* Apply this short delay always to ensure that we do wait tWB in |
274 | * any case on any machine. */ | |
275 | ndelay(100); | |
276 | ||
277 | if (1) { | |
2a7295b2 | 278 | int c; |
5467fb02 DW |
279 | uint32_t irqs; |
280 | ||
2a7295b2 | 281 | for (c = 500000; c != 0; c--) { |
195a253b | 282 | irqs = cafe_readl(cafe, NAND_IRQ); |
5467fb02 DW |
283 | if (irqs & doneint) |
284 | break; | |
285 | udelay(1); | |
8dd851de DW |
286 | if (!(c % 100000)) |
287 | cafe_dev_dbg(&cafe->pdev->dev, "Wait for ready, IRQ %x\n", irqs); | |
5467fb02 DW |
288 | cpu_relax(); |
289 | } | |
195a253b | 290 | cafe_writel(cafe, doneint, NAND_IRQ); |
a020727b | 291 | cafe_dev_dbg(&cafe->pdev->dev, "Command %x completed after %d usec, irqs %x (%x)\n", |
195a253b | 292 | command, 500000-c, irqs, cafe_readl(cafe, NAND_IRQ)); |
5467fb02 DW |
293 | } |
294 | ||
cad40654 | 295 | WARN_ON(cafe->ctl2 & (1<<30)); |
5467fb02 DW |
296 | |
297 | switch (command) { | |
298 | ||
299 | case NAND_CMD_CACHEDPROG: | |
300 | case NAND_CMD_PAGEPROG: | |
301 | case NAND_CMD_ERASE1: | |
302 | case NAND_CMD_ERASE2: | |
303 | case NAND_CMD_SEQIN: | |
304 | case NAND_CMD_RNDIN: | |
305 | case NAND_CMD_STATUS: | |
306 | case NAND_CMD_DEPLETE1: | |
307 | case NAND_CMD_RNDOUT: | |
308 | case NAND_CMD_STATUS_ERROR: | |
309 | case NAND_CMD_STATUS_ERROR0: | |
310 | case NAND_CMD_STATUS_ERROR1: | |
311 | case NAND_CMD_STATUS_ERROR2: | |
312 | case NAND_CMD_STATUS_ERROR3: | |
195a253b | 313 | cafe_writel(cafe, cafe->ctl2, NAND_CTRL2); |
5467fb02 DW |
314 | return; |
315 | } | |
316 | nand_wait_ready(mtd); | |
195a253b | 317 | cafe_writel(cafe, cafe->ctl2, NAND_CTRL2); |
5467fb02 DW |
318 | } |
319 | ||
320 | static void cafe_select_chip(struct mtd_info *mtd, int chipnr) | |
321 | { | |
048c37b4 DW |
322 | struct cafe_priv *cafe = mtd->priv; |
323 | ||
324 | cafe_dev_dbg(&cafe->pdev->dev, "select_chip %d\n", chipnr); | |
325 | ||
326 | /* Mask the appropriate bit into the stored value of ctl1 | |
327 | which will be used by cafe_nand_cmdfunc() */ | |
328 | if (chipnr) | |
329 | cafe->ctl1 |= CTRL1_CHIPSELECT; | |
330 | else | |
331 | cafe->ctl1 &= ~CTRL1_CHIPSELECT; | |
5467fb02 | 332 | } |
fbad5696 | 333 | |
67cd724f | 334 | static irqreturn_t cafe_nand_interrupt(int irq, void *id) |
5467fb02 DW |
335 | { |
336 | struct mtd_info *mtd = id; | |
337 | struct cafe_priv *cafe = mtd->priv; | |
195a253b DW |
338 | uint32_t irqs = cafe_readl(cafe, NAND_IRQ); |
339 | cafe_writel(cafe, irqs & ~0x90000000, NAND_IRQ); | |
5467fb02 DW |
340 | if (!irqs) |
341 | return IRQ_NONE; | |
342 | ||
195a253b | 343 | cafe_dev_dbg(&cafe->pdev->dev, "irq, bits %x (%x)\n", irqs, cafe_readl(cafe, NAND_IRQ)); |
5467fb02 DW |
344 | return IRQ_HANDLED; |
345 | } | |
346 | ||
347 | static void cafe_nand_bug(struct mtd_info *mtd) | |
348 | { | |
349 | BUG(); | |
350 | } | |
351 | ||
352 | static int cafe_nand_write_oob(struct mtd_info *mtd, | |
353 | struct nand_chip *chip, int page) | |
354 | { | |
355 | int status = 0; | |
356 | ||
5467fb02 DW |
357 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page); |
358 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); | |
359 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); | |
360 | status = chip->waitfunc(mtd, chip); | |
361 | ||
362 | return status & NAND_STATUS_FAIL ? -EIO : 0; | |
363 | } | |
364 | ||
365 | /* Don't use -- use nand_read_oob_std for now */ | |
366 | static int cafe_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, | |
367 | int page, int sndcmd) | |
368 | { | |
369 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); | |
370 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); | |
371 | return 1; | |
372 | } | |
373 | /** | |
374 | * cafe_nand_read_page_syndrome - {REPLACABLE] hardware ecc syndrom based page read | |
375 | * @mtd: mtd info structure | |
376 | * @chip: nand chip info structure | |
377 | * @buf: buffer to store read data | |
378 | * | |
379 | * The hw generator calculates the error syndrome automatically. Therefor | |
380 | * we need a special oob layout and handling. | |
381 | */ | |
382 | static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip, | |
46a8cf2d | 383 | uint8_t *buf, int page) |
5467fb02 DW |
384 | { |
385 | struct cafe_priv *cafe = mtd->priv; | |
386 | ||
fbad5696 | 387 | cafe_dev_dbg(&cafe->pdev->dev, "ECC result %08x SYN1,2 %08x\n", |
195a253b DW |
388 | cafe_readl(cafe, NAND_ECC_RESULT), |
389 | cafe_readl(cafe, NAND_ECC_SYN01)); | |
5467fb02 DW |
390 | |
391 | chip->read_buf(mtd, buf, mtd->writesize); | |
392 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); | |
393 | ||
195a253b | 394 | if (checkecc && cafe_readl(cafe, NAND_ECC_RESULT) & (1<<18)) { |
8c61b7a7 SB |
395 | unsigned short syn[8], pat[4]; |
396 | int pos[4]; | |
397 | u8 *oob = chip->oob_poi; | |
398 | int i, n; | |
04459d7c DW |
399 | |
400 | for (i=0; i<8; i+=2) { | |
195a253b | 401 | uint32_t tmp = cafe_readl(cafe, NAND_ECC_SYN01 + (i*2)); |
8c61b7a7 SB |
402 | syn[i] = cafe->rs->index_of[tmp & 0xfff]; |
403 | syn[i+1] = cafe->rs->index_of[(tmp >> 16) & 0xfff]; | |
404 | } | |
405 | ||
406 | n = decode_rs16(cafe->rs, NULL, NULL, 1367, syn, 0, pos, 0, | |
407 | pat); | |
408 | ||
409 | for (i = 0; i < n; i++) { | |
410 | int p = pos[i]; | |
411 | ||
412 | /* The 12-bit symbols are mapped to bytes here */ | |
413 | ||
414 | if (p > 1374) { | |
415 | /* out of range */ | |
416 | n = -1374; | |
417 | } else if (p == 0) { | |
418 | /* high four bits do not correspond to data */ | |
419 | if (pat[i] > 0xff) | |
420 | n = -2048; | |
421 | else | |
422 | buf[0] ^= pat[i]; | |
423 | } else if (p == 1365) { | |
424 | buf[2047] ^= pat[i] >> 4; | |
425 | oob[0] ^= pat[i] << 4; | |
426 | } else if (p > 1365) { | |
427 | if ((p & 1) == 1) { | |
428 | oob[3*p/2 - 2048] ^= pat[i] >> 4; | |
429 | oob[3*p/2 - 2047] ^= pat[i] << 4; | |
430 | } else { | |
431 | oob[3*p/2 - 2049] ^= pat[i] >> 8; | |
432 | oob[3*p/2 - 2048] ^= pat[i]; | |
433 | } | |
434 | } else if ((p & 1) == 1) { | |
435 | buf[3*p/2] ^= pat[i] >> 4; | |
436 | buf[3*p/2 + 1] ^= pat[i] << 4; | |
437 | } else { | |
438 | buf[3*p/2 - 1] ^= pat[i] >> 8; | |
439 | buf[3*p/2] ^= pat[i]; | |
440 | } | |
c9ac5977 | 441 | } |
04459d7c | 442 | |
8c61b7a7 | 443 | if (n < 0) { |
be8444bd DW |
444 | dev_dbg(&cafe->pdev->dev, "Failed to correct ECC at %08x\n", |
445 | cafe_readl(cafe, NAND_ADDR2) * 2048); | |
8c61b7a7 | 446 | for (i = 0; i < 0x5c; i += 4) |
be8444bd | 447 | printk("Register %x: %08x\n", i, readl(cafe->mmio + i)); |
04459d7c DW |
448 | mtd->ecc_stats.failed++; |
449 | } else { | |
8c61b7a7 SB |
450 | dev_dbg(&cafe->pdev->dev, "Corrected %d symbol errors\n", n); |
451 | mtd->ecc_stats.corrected += n; | |
04459d7c DW |
452 | } |
453 | } | |
454 | ||
5467fb02 DW |
455 | return 0; |
456 | } | |
457 | ||
8dd851de DW |
458 | static struct nand_ecclayout cafe_oobinfo_2048 = { |
459 | .eccbytes = 14, | |
460 | .eccpos = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, | |
461 | .oobfree = {{14, 50}} | |
462 | }; | |
463 | ||
c9ac5977 | 464 | /* Ick. The BBT code really ought to be able to work this bit out |
fbad5696 DW |
465 | for itself from the above, at least for the 2KiB case */ |
466 | static uint8_t cafe_bbt_pattern_2048[] = { 'B', 'b', 't', '0' }; | |
467 | static uint8_t cafe_mirror_pattern_2048[] = { '1', 't', 'b', 'B' }; | |
468 | ||
469 | static uint8_t cafe_bbt_pattern_512[] = { 0xBB }; | |
470 | static uint8_t cafe_mirror_pattern_512[] = { 0xBC }; | |
471 | ||
8dd851de DW |
472 | |
473 | static struct nand_bbt_descr cafe_bbt_main_descr_2048 = { | |
474 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
048c37b4 | 475 | | NAND_BBT_2BIT | NAND_BBT_VERSION, |
8dd851de DW |
476 | .offs = 14, |
477 | .len = 4, | |
478 | .veroffs = 18, | |
479 | .maxblocks = 4, | |
fbad5696 | 480 | .pattern = cafe_bbt_pattern_2048 |
8dd851de DW |
481 | }; |
482 | ||
483 | static struct nand_bbt_descr cafe_bbt_mirror_descr_2048 = { | |
484 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
048c37b4 | 485 | | NAND_BBT_2BIT | NAND_BBT_VERSION, |
8dd851de DW |
486 | .offs = 14, |
487 | .len = 4, | |
488 | .veroffs = 18, | |
489 | .maxblocks = 4, | |
fbad5696 | 490 | .pattern = cafe_mirror_pattern_2048 |
8dd851de DW |
491 | }; |
492 | ||
493 | static struct nand_ecclayout cafe_oobinfo_512 = { | |
494 | .eccbytes = 14, | |
495 | .eccpos = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13}, | |
496 | .oobfree = {{14, 2}} | |
497 | }; | |
498 | ||
fbad5696 DW |
499 | static struct nand_bbt_descr cafe_bbt_main_descr_512 = { |
500 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
048c37b4 | 501 | | NAND_BBT_2BIT | NAND_BBT_VERSION, |
fbad5696 DW |
502 | .offs = 14, |
503 | .len = 1, | |
504 | .veroffs = 15, | |
505 | .maxblocks = 4, | |
506 | .pattern = cafe_bbt_pattern_512 | |
507 | }; | |
508 | ||
509 | static struct nand_bbt_descr cafe_bbt_mirror_descr_512 = { | |
510 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
048c37b4 | 511 | | NAND_BBT_2BIT | NAND_BBT_VERSION, |
fbad5696 DW |
512 | .offs = 14, |
513 | .len = 1, | |
514 | .veroffs = 15, | |
515 | .maxblocks = 4, | |
516 | .pattern = cafe_mirror_pattern_512 | |
517 | }; | |
518 | ||
519 | ||
5467fb02 DW |
520 | static void cafe_nand_write_page_lowlevel(struct mtd_info *mtd, |
521 | struct nand_chip *chip, const uint8_t *buf) | |
522 | { | |
523 | struct cafe_priv *cafe = mtd->priv; | |
524 | ||
5467fb02 | 525 | chip->write_buf(mtd, buf, mtd->writesize); |
8dd851de | 526 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); |
5467fb02 DW |
527 | |
528 | /* Set up ECC autogeneration */ | |
cad40654 | 529 | cafe->ctl2 |= (1<<30); |
5467fb02 DW |
530 | } |
531 | ||
532 | static int cafe_nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, | |
533 | const uint8_t *buf, int page, int cached, int raw) | |
534 | { | |
535 | int status; | |
536 | ||
5467fb02 DW |
537 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0x00, page); |
538 | ||
539 | if (unlikely(raw)) | |
540 | chip->ecc.write_page_raw(mtd, chip, buf); | |
541 | else | |
542 | chip->ecc.write_page(mtd, chip, buf); | |
543 | ||
544 | /* | |
545 | * Cached progamming disabled for now, Not sure if its worth the | |
546 | * trouble. The speed gain is not very impressive. (2.3->2.6Mib/s) | |
547 | */ | |
548 | cached = 0; | |
549 | ||
550 | if (!cached || !(chip->options & NAND_CACHEPRG)) { | |
551 | ||
552 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); | |
553 | status = chip->waitfunc(mtd, chip); | |
554 | /* | |
555 | * See if operation failed and additional status checks are | |
556 | * available | |
557 | */ | |
558 | if ((status & NAND_STATUS_FAIL) && (chip->errstat)) | |
559 | status = chip->errstat(mtd, chip, FL_WRITING, status, | |
560 | page); | |
561 | ||
562 | if (status & NAND_STATUS_FAIL) | |
563 | return -EIO; | |
564 | } else { | |
565 | chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1); | |
566 | status = chip->waitfunc(mtd, chip); | |
567 | } | |
568 | ||
569 | #ifdef CONFIG_MTD_NAND_VERIFY_WRITE | |
570 | /* Send command to read back the data */ | |
571 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); | |
572 | ||
573 | if (chip->verify_buf(mtd, buf, mtd->writesize)) | |
574 | return -EIO; | |
575 | #endif | |
576 | return 0; | |
577 | } | |
578 | ||
8dd851de DW |
579 | static int cafe_nand_block_bad(struct mtd_info *mtd, loff_t ofs, int getchip) |
580 | { | |
581 | return 0; | |
582 | } | |
5467fb02 | 583 | |
8c61b7a7 SB |
584 | /* F_2[X]/(X**6+X+1) */ |
585 | static unsigned short __devinit gf64_mul(u8 a, u8 b) | |
586 | { | |
587 | u8 c; | |
588 | unsigned int i; | |
589 | ||
590 | c = 0; | |
591 | for (i = 0; i < 6; i++) { | |
592 | if (a & 1) | |
593 | c ^= b; | |
594 | a >>= 1; | |
595 | b <<= 1; | |
596 | if ((b & 0x40) != 0) | |
597 | b ^= 0x43; | |
598 | } | |
599 | ||
600 | return c; | |
601 | } | |
602 | ||
603 | /* F_64[X]/(X**2+X+A**-1) with A the generator of F_64[X] */ | |
604 | static u16 __devinit gf4096_mul(u16 a, u16 b) | |
605 | { | |
606 | u8 ah, al, bh, bl, ch, cl; | |
607 | ||
608 | ah = a >> 6; | |
609 | al = a & 0x3f; | |
610 | bh = b >> 6; | |
611 | bl = b & 0x3f; | |
612 | ||
613 | ch = gf64_mul(ah ^ al, bh ^ bl) ^ gf64_mul(al, bl); | |
614 | cl = gf64_mul(gf64_mul(ah, bh), 0x21) ^ gf64_mul(al, bl); | |
615 | ||
616 | return (ch << 6) ^ cl; | |
617 | } | |
618 | ||
619 | static int __devinit cafe_mul(int x) | |
620 | { | |
621 | if (x == 0) | |
622 | return 1; | |
623 | return gf4096_mul(x, 0xe01); | |
624 | } | |
625 | ||
5467fb02 DW |
626 | static int __devinit cafe_nand_probe(struct pci_dev *pdev, |
627 | const struct pci_device_id *ent) | |
628 | { | |
629 | struct mtd_info *mtd; | |
630 | struct cafe_priv *cafe; | |
631 | uint32_t ctrl; | |
632 | int err = 0; | |
437d0d29 TF |
633 | struct mtd_partition *parts; |
634 | int nr_parts; | |
5467fb02 | 635 | |
06ed24e5 DW |
636 | /* Very old versions shared the same PCI ident for all three |
637 | functions on the chip. Verify the class too... */ | |
638 | if ((pdev->class >> 8) != PCI_CLASS_MEMORY_FLASH) | |
639 | return -ENODEV; | |
640 | ||
5467fb02 DW |
641 | err = pci_enable_device(pdev); |
642 | if (err) | |
643 | return err; | |
644 | ||
645 | pci_set_master(pdev); | |
646 | ||
647 | mtd = kzalloc(sizeof(*mtd) + sizeof(struct cafe_priv), GFP_KERNEL); | |
648 | if (!mtd) { | |
649 | dev_warn(&pdev->dev, "failed to alloc mtd_info\n"); | |
650 | return -ENOMEM; | |
651 | } | |
652 | cafe = (void *)(&mtd[1]); | |
653 | ||
c451c7c4 | 654 | mtd->dev.parent = &pdev->dev; |
5467fb02 DW |
655 | mtd->priv = cafe; |
656 | mtd->owner = THIS_MODULE; | |
657 | ||
658 | cafe->pdev = pdev; | |
659 | cafe->mmio = pci_iomap(pdev, 0, 0); | |
660 | if (!cafe->mmio) { | |
661 | dev_warn(&pdev->dev, "failed to iomap\n"); | |
662 | err = -ENOMEM; | |
663 | goto out_free_mtd; | |
664 | } | |
665 | cafe->dmabuf = dma_alloc_coherent(&cafe->pdev->dev, 2112 + sizeof(struct nand_buffers), | |
666 | &cafe->dmaaddr, GFP_KERNEL); | |
667 | if (!cafe->dmabuf) { | |
668 | err = -ENOMEM; | |
669 | goto out_ior; | |
670 | } | |
671 | cafe->nand.buffers = (void *)cafe->dmabuf + 2112; | |
672 | ||
8c61b7a7 SB |
673 | cafe->rs = init_rs_non_canonical(12, &cafe_mul, 0, 1, 8); |
674 | if (!cafe->rs) { | |
675 | err = -ENOMEM; | |
676 | goto out_ior; | |
677 | } | |
678 | ||
5467fb02 DW |
679 | cafe->nand.cmdfunc = cafe_nand_cmdfunc; |
680 | cafe->nand.dev_ready = cafe_device_ready; | |
681 | cafe->nand.read_byte = cafe_read_byte; | |
682 | cafe->nand.read_buf = cafe_read_buf; | |
683 | cafe->nand.write_buf = cafe_write_buf; | |
684 | cafe->nand.select_chip = cafe_select_chip; | |
685 | ||
686 | cafe->nand.chip_delay = 0; | |
687 | ||
688 | /* Enable the following for a flash based bad block table */ | |
689 | cafe->nand.options = NAND_USE_FLASH_BBT | NAND_NO_AUTOINCR | NAND_OWN_BUFFERS; | |
8dd851de DW |
690 | |
691 | if (skipbbt) { | |
692 | cafe->nand.options |= NAND_SKIP_BBTSCAN; | |
693 | cafe->nand.block_bad = cafe_nand_block_bad; | |
694 | } | |
c9ac5977 | 695 | |
527a4f45 DW |
696 | if (numtimings && numtimings != 3) { |
697 | dev_warn(&cafe->pdev->dev, "%d timing register values ignored; precisely three are required\n", numtimings); | |
698 | } | |
699 | ||
700 | if (numtimings == 3) { | |
527a4f45 | 701 | cafe_dev_dbg(&cafe->pdev->dev, "Using provided timings (%08x %08x %08x)\n", |
8e5368a1 | 702 | timing[0], timing[1], timing[2]); |
527a4f45 | 703 | } else { |
8e5368a1 DW |
704 | timing[0] = cafe_readl(cafe, NAND_TIMING1); |
705 | timing[1] = cafe_readl(cafe, NAND_TIMING2); | |
706 | timing[2] = cafe_readl(cafe, NAND_TIMING3); | |
527a4f45 | 707 | |
8e5368a1 DW |
708 | if (timing[0] | timing[1] | timing[2]) { |
709 | cafe_dev_dbg(&cafe->pdev->dev, "Timing registers already set (%08x %08x %08x)\n", | |
710 | timing[0], timing[1], timing[2]); | |
527a4f45 DW |
711 | } else { |
712 | dev_warn(&cafe->pdev->dev, "Timing registers unset; using most conservative defaults\n"); | |
8e5368a1 | 713 | timing[0] = timing[1] = timing[2] = 0xffffffff; |
527a4f45 DW |
714 | } |
715 | } | |
716 | ||
dcc41bc8 | 717 | /* Start off by resetting the NAND controller completely */ |
195a253b DW |
718 | cafe_writel(cafe, 1, NAND_RESET); |
719 | cafe_writel(cafe, 0, NAND_RESET); | |
dcc41bc8 | 720 | |
8e5368a1 DW |
721 | cafe_writel(cafe, timing[0], NAND_TIMING1); |
722 | cafe_writel(cafe, timing[1], NAND_TIMING2); | |
723 | cafe_writel(cafe, timing[2], NAND_TIMING3); | |
b478c775 | 724 | |
195a253b | 725 | cafe_writel(cafe, 0xffffffff, NAND_IRQ_MASK); |
2db6346f TG |
726 | err = request_irq(pdev->irq, &cafe_nand_interrupt, IRQF_SHARED, |
727 | "CAFE NAND", mtd); | |
5467fb02 DW |
728 | if (err) { |
729 | dev_warn(&pdev->dev, "Could not register IRQ %d\n", pdev->irq); | |
5467fb02 DW |
730 | goto out_free_dma; |
731 | } | |
f7c37d7b | 732 | |
5467fb02 | 733 | /* Disable master reset, enable NAND clock */ |
195a253b | 734 | ctrl = cafe_readl(cafe, GLOBAL_CTRL); |
5467fb02 DW |
735 | ctrl &= 0xffffeff0; |
736 | ctrl |= 0x00007000; | |
195a253b DW |
737 | cafe_writel(cafe, ctrl | 0x05, GLOBAL_CTRL); |
738 | cafe_writel(cafe, ctrl | 0x0a, GLOBAL_CTRL); | |
739 | cafe_writel(cafe, 0, NAND_DMA_CTRL); | |
5467fb02 | 740 | |
195a253b DW |
741 | cafe_writel(cafe, 0x7006, GLOBAL_CTRL); |
742 | cafe_writel(cafe, 0x700a, GLOBAL_CTRL); | |
5467fb02 DW |
743 | |
744 | /* Set up DMA address */ | |
195a253b | 745 | cafe_writel(cafe, cafe->dmaaddr & 0xffffffff, NAND_DMA_ADDR0); |
5467fb02 | 746 | if (sizeof(cafe->dmaaddr) > 4) |
fbad5696 | 747 | /* Shift in two parts to shut the compiler up */ |
195a253b | 748 | cafe_writel(cafe, (cafe->dmaaddr >> 16) >> 16, NAND_DMA_ADDR1); |
5467fb02 | 749 | else |
195a253b | 750 | cafe_writel(cafe, 0, NAND_DMA_ADDR1); |
fbad5696 | 751 | |
8dd851de | 752 | cafe_dev_dbg(&cafe->pdev->dev, "Set DMA address to %x (virt %p)\n", |
195a253b | 753 | cafe_readl(cafe, NAND_DMA_ADDR0), cafe->dmabuf); |
5467fb02 DW |
754 | |
755 | /* Enable NAND IRQ in global IRQ mask register */ | |
195a253b | 756 | cafe_writel(cafe, 0x80000007, GLOBAL_IRQ_MASK); |
8dd851de | 757 | cafe_dev_dbg(&cafe->pdev->dev, "Control %x, IRQ mask %x\n", |
195a253b | 758 | cafe_readl(cafe, GLOBAL_CTRL), cafe_readl(cafe, GLOBAL_IRQ_MASK)); |
f7c37d7b DW |
759 | |
760 | /* Scan to find existence of the device */ | |
5e81e88a | 761 | if (nand_scan_ident(mtd, 2, NULL)) { |
5467fb02 DW |
762 | err = -ENXIO; |
763 | goto out_irq; | |
764 | } | |
765 | ||
766 | cafe->ctl2 = 1<<27; /* Reed-Solomon ECC */ | |
767 | if (mtd->writesize == 2048) | |
768 | cafe->ctl2 |= 1<<29; /* 2KiB page size */ | |
769 | ||
770 | /* Set up ECC according to the type of chip we found */ | |
fbad5696 | 771 | if (mtd->writesize == 2048) { |
8dd851de DW |
772 | cafe->nand.ecc.layout = &cafe_oobinfo_2048; |
773 | cafe->nand.bbt_td = &cafe_bbt_main_descr_2048; | |
774 | cafe->nand.bbt_md = &cafe_bbt_mirror_descr_2048; | |
fbad5696 DW |
775 | } else if (mtd->writesize == 512) { |
776 | cafe->nand.ecc.layout = &cafe_oobinfo_512; | |
777 | cafe->nand.bbt_td = &cafe_bbt_main_descr_512; | |
778 | cafe->nand.bbt_md = &cafe_bbt_mirror_descr_512; | |
5467fb02 | 779 | } else { |
fbad5696 | 780 | printk(KERN_WARNING "Unexpected NAND flash writesize %d. Aborting\n", |
5467fb02 | 781 | mtd->writesize); |
fbad5696 | 782 | goto out_irq; |
5467fb02 | 783 | } |
fbad5696 DW |
784 | cafe->nand.ecc.mode = NAND_ECC_HW_SYNDROME; |
785 | cafe->nand.ecc.size = mtd->writesize; | |
786 | cafe->nand.ecc.bytes = 14; | |
787 | cafe->nand.ecc.hwctl = (void *)cafe_nand_bug; | |
788 | cafe->nand.ecc.calculate = (void *)cafe_nand_bug; | |
789 | cafe->nand.ecc.correct = (void *)cafe_nand_bug; | |
790 | cafe->nand.write_page = cafe_nand_write_page; | |
791 | cafe->nand.ecc.write_page = cafe_nand_write_page_lowlevel; | |
792 | cafe->nand.ecc.write_oob = cafe_nand_write_oob; | |
793 | cafe->nand.ecc.read_page = cafe_nand_read_page; | |
794 | cafe->nand.ecc.read_oob = cafe_nand_read_oob; | |
5467fb02 DW |
795 | |
796 | err = nand_scan_tail(mtd); | |
797 | if (err) | |
798 | goto out_irq; | |
799 | ||
5467fb02 | 800 | pci_set_drvdata(pdev, mtd); |
9c37f332 DW |
801 | |
802 | /* We register the whole device first, separate from the partitions */ | |
46720bbf | 803 | mtd_device_register(mtd, NULL, 0); |
9c37f332 | 804 | |
68874414 PR |
805 | #ifdef CONFIG_MTD_CMDLINE_PARTS |
806 | mtd->name = "cafe_nand"; | |
807 | #endif | |
9c37f332 DW |
808 | nr_parts = parse_mtd_partitions(mtd, part_probes, &parts, 0); |
809 | if (nr_parts > 0) { | |
810 | cafe->parts = parts; | |
68874414 | 811 | dev_info(&cafe->pdev->dev, "%d partitions found\n", nr_parts); |
46720bbf | 812 | mtd_device_register(mtd, parts, nr_parts); |
9c37f332 | 813 | } |
5467fb02 DW |
814 | goto out; |
815 | ||
816 | out_irq: | |
817 | /* Disable NAND IRQ in global IRQ mask register */ | |
195a253b | 818 | cafe_writel(cafe, ~1 & cafe_readl(cafe, GLOBAL_IRQ_MASK), GLOBAL_IRQ_MASK); |
5467fb02 DW |
819 | free_irq(pdev->irq, mtd); |
820 | out_free_dma: | |
821 | dma_free_coherent(&cafe->pdev->dev, 2112, cafe->dmabuf, cafe->dmaaddr); | |
822 | out_ior: | |
823 | pci_iounmap(pdev, cafe->mmio); | |
824 | out_free_mtd: | |
825 | kfree(mtd); | |
826 | out: | |
827 | return err; | |
828 | } | |
829 | ||
830 | static void __devexit cafe_nand_remove(struct pci_dev *pdev) | |
831 | { | |
832 | struct mtd_info *mtd = pci_get_drvdata(pdev); | |
833 | struct cafe_priv *cafe = mtd->priv; | |
834 | ||
5467fb02 | 835 | /* Disable NAND IRQ in global IRQ mask register */ |
195a253b | 836 | cafe_writel(cafe, ~1 & cafe_readl(cafe, GLOBAL_IRQ_MASK), GLOBAL_IRQ_MASK); |
5467fb02 DW |
837 | free_irq(pdev->irq, mtd); |
838 | nand_release(mtd); | |
8c61b7a7 | 839 | free_rs(cafe->rs); |
5467fb02 DW |
840 | pci_iounmap(pdev, cafe->mmio); |
841 | dma_free_coherent(&cafe->pdev->dev, 2112, cafe->dmabuf, cafe->dmaaddr); | |
842 | kfree(mtd); | |
843 | } | |
844 | ||
377ace08 | 845 | static const struct pci_device_id cafe_nand_tbl[] = { |
514fca43 DW |
846 | { PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_88ALP01_NAND, |
847 | PCI_ANY_ID, PCI_ANY_ID }, | |
06ed24e5 | 848 | { } |
5467fb02 DW |
849 | }; |
850 | ||
851 | MODULE_DEVICE_TABLE(pci, cafe_nand_tbl); | |
852 | ||
1fcf8ce5 DW |
853 | static int cafe_nand_resume(struct pci_dev *pdev) |
854 | { | |
855 | uint32_t ctrl; | |
856 | struct mtd_info *mtd = pci_get_drvdata(pdev); | |
857 | struct cafe_priv *cafe = mtd->priv; | |
858 | ||
859 | /* Start off by resetting the NAND controller completely */ | |
860 | cafe_writel(cafe, 1, NAND_RESET); | |
861 | cafe_writel(cafe, 0, NAND_RESET); | |
862 | cafe_writel(cafe, 0xffffffff, NAND_IRQ_MASK); | |
863 | ||
864 | /* Restore timing configuration */ | |
865 | cafe_writel(cafe, timing[0], NAND_TIMING1); | |
866 | cafe_writel(cafe, timing[1], NAND_TIMING2); | |
867 | cafe_writel(cafe, timing[2], NAND_TIMING3); | |
868 | ||
869 | /* Disable master reset, enable NAND clock */ | |
870 | ctrl = cafe_readl(cafe, GLOBAL_CTRL); | |
871 | ctrl &= 0xffffeff0; | |
872 | ctrl |= 0x00007000; | |
873 | cafe_writel(cafe, ctrl | 0x05, GLOBAL_CTRL); | |
874 | cafe_writel(cafe, ctrl | 0x0a, GLOBAL_CTRL); | |
875 | cafe_writel(cafe, 0, NAND_DMA_CTRL); | |
876 | cafe_writel(cafe, 0x7006, GLOBAL_CTRL); | |
877 | cafe_writel(cafe, 0x700a, GLOBAL_CTRL); | |
878 | ||
879 | /* Set up DMA address */ | |
880 | cafe_writel(cafe, cafe->dmaaddr & 0xffffffff, NAND_DMA_ADDR0); | |
881 | if (sizeof(cafe->dmaaddr) > 4) | |
882 | /* Shift in two parts to shut the compiler up */ | |
883 | cafe_writel(cafe, (cafe->dmaaddr >> 16) >> 16, NAND_DMA_ADDR1); | |
884 | else | |
885 | cafe_writel(cafe, 0, NAND_DMA_ADDR1); | |
886 | ||
887 | /* Enable NAND IRQ in global IRQ mask register */ | |
888 | cafe_writel(cafe, 0x80000007, GLOBAL_IRQ_MASK); | |
889 | return 0; | |
890 | } | |
891 | ||
5467fb02 DW |
892 | static struct pci_driver cafe_nand_pci_driver = { |
893 | .name = "CAFÉ NAND", | |
894 | .id_table = cafe_nand_tbl, | |
895 | .probe = cafe_nand_probe, | |
896 | .remove = __devexit_p(cafe_nand_remove), | |
5467fb02 | 897 | .resume = cafe_nand_resume, |
5467fb02 DW |
898 | }; |
899 | ||
627df23c | 900 | static int __init cafe_nand_init(void) |
5467fb02 DW |
901 | { |
902 | return pci_register_driver(&cafe_nand_pci_driver); | |
903 | } | |
904 | ||
627df23c | 905 | static void __exit cafe_nand_exit(void) |
5467fb02 DW |
906 | { |
907 | pci_unregister_driver(&cafe_nand_pci_driver); | |
908 | } | |
909 | module_init(cafe_nand_init); | |
910 | module_exit(cafe_nand_exit); | |
911 | ||
912 | MODULE_LICENSE("GPL"); | |
913 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
f7c37d7b | 914 | MODULE_DESCRIPTION("NAND flash driver for OLPC CAFÉ chip"); |