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> |
a0e5cc58 | 24 | #include <linux/module.h> |
5467fb02 DW |
25 | #include <asm/io.h> |
26 | ||
27 | #define CAFE_NAND_CTRL1 0x00 | |
28 | #define CAFE_NAND_CTRL2 0x04 | |
29 | #define CAFE_NAND_CTRL3 0x08 | |
30 | #define CAFE_NAND_STATUS 0x0c | |
31 | #define CAFE_NAND_IRQ 0x10 | |
32 | #define CAFE_NAND_IRQ_MASK 0x14 | |
33 | #define CAFE_NAND_DATA_LEN 0x18 | |
34 | #define CAFE_NAND_ADDR1 0x1c | |
35 | #define CAFE_NAND_ADDR2 0x20 | |
36 | #define CAFE_NAND_TIMING1 0x24 | |
37 | #define CAFE_NAND_TIMING2 0x28 | |
38 | #define CAFE_NAND_TIMING3 0x2c | |
39 | #define CAFE_NAND_NONMEM 0x30 | |
04459d7c | 40 | #define CAFE_NAND_ECC_RESULT 0x3C |
fbad5696 DW |
41 | #define CAFE_NAND_DMA_CTRL 0x40 |
42 | #define CAFE_NAND_DMA_ADDR0 0x44 | |
43 | #define CAFE_NAND_DMA_ADDR1 0x48 | |
04459d7c DW |
44 | #define CAFE_NAND_ECC_SYN01 0x50 |
45 | #define CAFE_NAND_ECC_SYN23 0x54 | |
46 | #define CAFE_NAND_ECC_SYN45 0x58 | |
47 | #define CAFE_NAND_ECC_SYN67 0x5c | |
5467fb02 DW |
48 | #define CAFE_NAND_READ_DATA 0x1000 |
49 | #define CAFE_NAND_WRITE_DATA 0x2000 | |
50 | ||
195a253b DW |
51 | #define CAFE_GLOBAL_CTRL 0x3004 |
52 | #define CAFE_GLOBAL_IRQ 0x3008 | |
53 | #define CAFE_GLOBAL_IRQ_MASK 0x300c | |
54 | #define CAFE_NAND_RESET 0x3034 | |
55 | ||
048c37b4 DW |
56 | /* Missing from the datasheet: bit 19 of CTRL1 sets CE0 vs. CE1 */ |
57 | #define CTRL1_CHIPSELECT (1<<19) | |
58 | ||
5467fb02 DW |
59 | struct cafe_priv { |
60 | struct nand_chip nand; | |
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 | { | |
4bd4ebcc | 104 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 105 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
48f8b641 | 106 | int result = !!(cafe_readl(cafe, NAND_STATUS) & 0x40000000); |
195a253b | 107 | uint32_t irqs = cafe_readl(cafe, NAND_IRQ); |
fbad5696 | 108 | |
195a253b | 109 | cafe_writel(cafe, irqs, NAND_IRQ); |
fbad5696 | 110 | |
8dd851de | 111 | cafe_dev_dbg(&cafe->pdev->dev, "NAND device is%s ready, IRQ %x (%x) (%x,%x)\n", |
195a253b DW |
112 | result?"":" not", irqs, cafe_readl(cafe, NAND_IRQ), |
113 | cafe_readl(cafe, GLOBAL_IRQ), cafe_readl(cafe, GLOBAL_IRQ_MASK)); | |
fbad5696 | 114 | |
5467fb02 DW |
115 | return result; |
116 | } | |
117 | ||
118 | ||
119 | static void cafe_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len) | |
120 | { | |
4bd4ebcc | 121 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 122 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
5467fb02 DW |
123 | |
124 | if (usedma) | |
125 | memcpy(cafe->dmabuf + cafe->datalen, buf, len); | |
126 | else | |
127 | memcpy_toio(cafe->mmio + CAFE_NAND_WRITE_DATA + cafe->datalen, buf, len); | |
fbad5696 | 128 | |
5467fb02 DW |
129 | cafe->datalen += len; |
130 | ||
8dd851de | 131 | cafe_dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes to write buffer. datalen 0x%x\n", |
5467fb02 DW |
132 | len, cafe->datalen); |
133 | } | |
134 | ||
135 | static void cafe_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) | |
136 | { | |
4bd4ebcc | 137 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 138 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
5467fb02 DW |
139 | |
140 | if (usedma) | |
141 | memcpy(buf, cafe->dmabuf + cafe->datalen, len); | |
142 | else | |
143 | memcpy_fromio(buf, cafe->mmio + CAFE_NAND_READ_DATA + cafe->datalen, len); | |
144 | ||
8dd851de | 145 | cafe_dev_dbg(&cafe->pdev->dev, "Copy 0x%x bytes from position 0x%x in read buffer.\n", |
5467fb02 DW |
146 | len, cafe->datalen); |
147 | cafe->datalen += len; | |
148 | } | |
149 | ||
150 | static uint8_t cafe_read_byte(struct mtd_info *mtd) | |
151 | { | |
4bd4ebcc | 152 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 153 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
5467fb02 DW |
154 | uint8_t d; |
155 | ||
156 | cafe_read_buf(mtd, &d, 1); | |
8dd851de | 157 | cafe_dev_dbg(&cafe->pdev->dev, "Read %02x\n", d); |
5467fb02 DW |
158 | |
159 | return d; | |
160 | } | |
161 | ||
162 | static void cafe_nand_cmdfunc(struct mtd_info *mtd, unsigned command, | |
163 | int column, int page_addr) | |
164 | { | |
4bd4ebcc | 165 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 166 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
5467fb02 DW |
167 | int adrbytes = 0; |
168 | uint32_t ctl1; | |
169 | uint32_t doneint = 0x80000000; | |
5467fb02 | 170 | |
8dd851de | 171 | cafe_dev_dbg(&cafe->pdev->dev, "cmdfunc %02x, 0x%x, 0x%x\n", |
5467fb02 DW |
172 | command, column, page_addr); |
173 | ||
174 | if (command == NAND_CMD_ERASE2 || command == NAND_CMD_PAGEPROG) { | |
175 | /* Second half of a command we already calculated */ | |
195a253b | 176 | cafe_writel(cafe, cafe->ctl2 | 0x100 | command, NAND_CTRL2); |
5467fb02 | 177 | ctl1 = cafe->ctl1; |
cad40654 | 178 | cafe->ctl2 &= ~(1<<30); |
8dd851de | 179 | cafe_dev_dbg(&cafe->pdev->dev, "Continue command, ctl1 %08x, #data %d\n", |
5467fb02 DW |
180 | cafe->ctl1, cafe->nr_data); |
181 | goto do_command; | |
182 | } | |
183 | /* Reset ECC engine */ | |
195a253b | 184 | cafe_writel(cafe, 0, NAND_CTRL2); |
5467fb02 DW |
185 | |
186 | /* Emulate NAND_CMD_READOOB on large-page chips */ | |
187 | if (mtd->writesize > 512 && | |
188 | command == NAND_CMD_READOOB) { | |
189 | column += mtd->writesize; | |
190 | command = NAND_CMD_READ0; | |
191 | } | |
192 | ||
193 | /* FIXME: Do we need to send read command before sending data | |
194 | for small-page chips, to position the buffer correctly? */ | |
195 | ||
196 | if (column != -1) { | |
195a253b | 197 | cafe_writel(cafe, column, NAND_ADDR1); |
5467fb02 DW |
198 | adrbytes = 2; |
199 | if (page_addr != -1) | |
200 | goto write_adr2; | |
201 | } else if (page_addr != -1) { | |
195a253b | 202 | cafe_writel(cafe, page_addr & 0xffff, NAND_ADDR1); |
5467fb02 DW |
203 | page_addr >>= 16; |
204 | write_adr2: | |
195a253b | 205 | cafe_writel(cafe, page_addr, NAND_ADDR2); |
5467fb02 DW |
206 | adrbytes += 2; |
207 | if (mtd->size > mtd->writesize << 16) | |
208 | adrbytes++; | |
209 | } | |
210 | ||
211 | cafe->data_pos = cafe->datalen = 0; | |
212 | ||
048c37b4 DW |
213 | /* Set command valid bit, mask in the chip select bit */ |
214 | ctl1 = 0x80000000 | command | (cafe->ctl1 & CTRL1_CHIPSELECT); | |
5467fb02 DW |
215 | |
216 | /* Set RD or WR bits as appropriate */ | |
217 | if (command == NAND_CMD_READID || command == NAND_CMD_STATUS) { | |
218 | ctl1 |= (1<<26); /* rd */ | |
219 | /* Always 5 bytes, for now */ | |
8dd851de | 220 | cafe->datalen = 4; |
5467fb02 DW |
221 | /* And one address cycle -- even for STATUS, since the controller doesn't work without */ |
222 | adrbytes = 1; | |
223 | } else if (command == NAND_CMD_READ0 || command == NAND_CMD_READ1 || | |
224 | command == NAND_CMD_READOOB || command == NAND_CMD_RNDOUT) { | |
225 | ctl1 |= 1<<26; /* rd */ | |
226 | /* For now, assume just read to end of page */ | |
227 | cafe->datalen = mtd->writesize + mtd->oobsize - column; | |
228 | } else if (command == NAND_CMD_SEQIN) | |
229 | ctl1 |= 1<<25; /* wr */ | |
230 | ||
231 | /* Set number of address bytes */ | |
232 | if (adrbytes) | |
233 | ctl1 |= ((adrbytes-1)|8) << 27; | |
234 | ||
235 | if (command == NAND_CMD_SEQIN || command == NAND_CMD_ERASE1) { | |
c9ac5977 | 236 | /* Ignore the first command of a pair; the hardware |
5467fb02 DW |
237 | deals with them both at once, later */ |
238 | cafe->ctl1 = ctl1; | |
8dd851de | 239 | cafe_dev_dbg(&cafe->pdev->dev, "Setup for delayed command, ctl1 %08x, dlen %x\n", |
5467fb02 DW |
240 | cafe->ctl1, cafe->datalen); |
241 | return; | |
242 | } | |
243 | /* RNDOUT and READ0 commands need a following byte */ | |
244 | if (command == NAND_CMD_RNDOUT) | |
195a253b | 245 | cafe_writel(cafe, cafe->ctl2 | 0x100 | NAND_CMD_RNDOUTSTART, NAND_CTRL2); |
5467fb02 | 246 | else if (command == NAND_CMD_READ0 && mtd->writesize > 512) |
195a253b | 247 | cafe_writel(cafe, cafe->ctl2 | 0x100 | NAND_CMD_READSTART, NAND_CTRL2); |
5467fb02 DW |
248 | |
249 | do_command: | |
c9ac5977 | 250 | cafe_dev_dbg(&cafe->pdev->dev, "dlen %x, ctl1 %x, ctl2 %x\n", |
195a253b | 251 | cafe->datalen, ctl1, cafe_readl(cafe, NAND_CTRL2)); |
fbad5696 | 252 | |
5467fb02 | 253 | /* NB: The datasheet lies -- we really should be subtracting 1 here */ |
195a253b DW |
254 | cafe_writel(cafe, cafe->datalen, NAND_DATA_LEN); |
255 | cafe_writel(cafe, 0x90000000, NAND_IRQ); | |
5467fb02 DW |
256 | if (usedma && (ctl1 & (3<<25))) { |
257 | uint32_t dmactl = 0xc0000000 + cafe->datalen; | |
258 | /* If WR or RD bits set, set up DMA */ | |
259 | if (ctl1 & (1<<26)) { | |
260 | /* It's a read */ | |
261 | dmactl |= (1<<29); | |
262 | /* ... so it's done when the DMA is done, not just | |
263 | the command. */ | |
264 | doneint = 0x10000000; | |
265 | } | |
195a253b | 266 | cafe_writel(cafe, dmactl, NAND_DMA_CTRL); |
5467fb02 | 267 | } |
5467fb02 DW |
268 | cafe->datalen = 0; |
269 | ||
be8444bd DW |
270 | if (unlikely(regdebug)) { |
271 | int i; | |
272 | printk("About to write command %08x to register 0\n", ctl1); | |
273 | for (i=4; i< 0x5c; i+=4) | |
274 | printk("Register %x: %08x\n", i, readl(cafe->mmio + i)); | |
fbad5696 | 275 | } |
be8444bd | 276 | |
195a253b | 277 | cafe_writel(cafe, ctl1, NAND_CTRL1); |
5467fb02 DW |
278 | /* Apply this short delay always to ensure that we do wait tWB in |
279 | * any case on any machine. */ | |
280 | ndelay(100); | |
281 | ||
282 | if (1) { | |
2a7295b2 | 283 | int c; |
5467fb02 DW |
284 | uint32_t irqs; |
285 | ||
2a7295b2 | 286 | for (c = 500000; c != 0; c--) { |
195a253b | 287 | irqs = cafe_readl(cafe, NAND_IRQ); |
5467fb02 DW |
288 | if (irqs & doneint) |
289 | break; | |
290 | udelay(1); | |
8dd851de DW |
291 | if (!(c % 100000)) |
292 | cafe_dev_dbg(&cafe->pdev->dev, "Wait for ready, IRQ %x\n", irqs); | |
5467fb02 DW |
293 | cpu_relax(); |
294 | } | |
195a253b | 295 | cafe_writel(cafe, doneint, NAND_IRQ); |
a020727b | 296 | cafe_dev_dbg(&cafe->pdev->dev, "Command %x completed after %d usec, irqs %x (%x)\n", |
195a253b | 297 | command, 500000-c, irqs, cafe_readl(cafe, NAND_IRQ)); |
5467fb02 DW |
298 | } |
299 | ||
cad40654 | 300 | WARN_ON(cafe->ctl2 & (1<<30)); |
5467fb02 DW |
301 | |
302 | switch (command) { | |
303 | ||
304 | case NAND_CMD_CACHEDPROG: | |
305 | case NAND_CMD_PAGEPROG: | |
306 | case NAND_CMD_ERASE1: | |
307 | case NAND_CMD_ERASE2: | |
308 | case NAND_CMD_SEQIN: | |
309 | case NAND_CMD_RNDIN: | |
310 | case NAND_CMD_STATUS: | |
5467fb02 | 311 | case NAND_CMD_RNDOUT: |
195a253b | 312 | cafe_writel(cafe, cafe->ctl2, NAND_CTRL2); |
5467fb02 DW |
313 | return; |
314 | } | |
315 | nand_wait_ready(mtd); | |
195a253b | 316 | cafe_writel(cafe, cafe->ctl2, NAND_CTRL2); |
5467fb02 DW |
317 | } |
318 | ||
319 | static void cafe_select_chip(struct mtd_info *mtd, int chipnr) | |
320 | { | |
4bd4ebcc | 321 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 322 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
048c37b4 DW |
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; | |
4bd4ebcc | 337 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 338 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
195a253b DW |
339 | uint32_t irqs = cafe_readl(cafe, NAND_IRQ); |
340 | cafe_writel(cafe, irqs & ~0x90000000, NAND_IRQ); | |
5467fb02 DW |
341 | if (!irqs) |
342 | return IRQ_NONE; | |
343 | ||
195a253b | 344 | cafe_dev_dbg(&cafe->pdev->dev, "irq, bits %x (%x)\n", irqs, cafe_readl(cafe, NAND_IRQ)); |
5467fb02 DW |
345 | return IRQ_HANDLED; |
346 | } | |
347 | ||
348 | static void cafe_nand_bug(struct mtd_info *mtd) | |
349 | { | |
350 | BUG(); | |
351 | } | |
352 | ||
353 | static int cafe_nand_write_oob(struct mtd_info *mtd, | |
354 | struct nand_chip *chip, int page) | |
355 | { | |
356 | int status = 0; | |
357 | ||
5467fb02 DW |
358 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page); |
359 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); | |
360 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); | |
361 | status = chip->waitfunc(mtd, chip); | |
362 | ||
363 | return status & NAND_STATUS_FAIL ? -EIO : 0; | |
364 | } | |
365 | ||
366 | /* Don't use -- use nand_read_oob_std for now */ | |
367 | static int cafe_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip, | |
5c2ffb11 | 368 | int page) |
5467fb02 DW |
369 | { |
370 | chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); | |
371 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); | |
5c2ffb11 | 372 | return 0; |
5467fb02 DW |
373 | } |
374 | /** | |
7854d3f7 | 375 | * cafe_nand_read_page_syndrome - [REPLACEABLE] hardware ecc syndrome based page read |
5467fb02 DW |
376 | * @mtd: mtd info structure |
377 | * @chip: nand chip info structure | |
378 | * @buf: buffer to store read data | |
1fbb938d | 379 | * @oob_required: caller expects OOB data read to chip->oob_poi |
5467fb02 | 380 | * |
b9bc815c | 381 | * The hw generator calculates the error syndrome automatically. Therefore |
5467fb02 DW |
382 | * we need a special oob layout and handling. |
383 | */ | |
384 | static int cafe_nand_read_page(struct mtd_info *mtd, struct nand_chip *chip, | |
1fbb938d | 385 | uint8_t *buf, int oob_required, int page) |
5467fb02 | 386 | { |
d699ed25 | 387 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
3f91e94f | 388 | unsigned int max_bitflips = 0; |
5467fb02 | 389 | |
fbad5696 | 390 | cafe_dev_dbg(&cafe->pdev->dev, "ECC result %08x SYN1,2 %08x\n", |
195a253b DW |
391 | cafe_readl(cafe, NAND_ECC_RESULT), |
392 | cafe_readl(cafe, NAND_ECC_SYN01)); | |
5467fb02 DW |
393 | |
394 | chip->read_buf(mtd, buf, mtd->writesize); | |
395 | chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); | |
396 | ||
195a253b | 397 | if (checkecc && cafe_readl(cafe, NAND_ECC_RESULT) & (1<<18)) { |
8c61b7a7 SB |
398 | unsigned short syn[8], pat[4]; |
399 | int pos[4]; | |
400 | u8 *oob = chip->oob_poi; | |
401 | int i, n; | |
04459d7c DW |
402 | |
403 | for (i=0; i<8; i+=2) { | |
195a253b | 404 | uint32_t tmp = cafe_readl(cafe, NAND_ECC_SYN01 + (i*2)); |
8c61b7a7 SB |
405 | syn[i] = cafe->rs->index_of[tmp & 0xfff]; |
406 | syn[i+1] = cafe->rs->index_of[(tmp >> 16) & 0xfff]; | |
407 | } | |
408 | ||
409 | n = decode_rs16(cafe->rs, NULL, NULL, 1367, syn, 0, pos, 0, | |
410 | pat); | |
411 | ||
412 | for (i = 0; i < n; i++) { | |
413 | int p = pos[i]; | |
414 | ||
415 | /* The 12-bit symbols are mapped to bytes here */ | |
416 | ||
417 | if (p > 1374) { | |
418 | /* out of range */ | |
419 | n = -1374; | |
420 | } else if (p == 0) { | |
421 | /* high four bits do not correspond to data */ | |
422 | if (pat[i] > 0xff) | |
423 | n = -2048; | |
424 | else | |
425 | buf[0] ^= pat[i]; | |
426 | } else if (p == 1365) { | |
427 | buf[2047] ^= pat[i] >> 4; | |
428 | oob[0] ^= pat[i] << 4; | |
429 | } else if (p > 1365) { | |
430 | if ((p & 1) == 1) { | |
431 | oob[3*p/2 - 2048] ^= pat[i] >> 4; | |
432 | oob[3*p/2 - 2047] ^= pat[i] << 4; | |
433 | } else { | |
434 | oob[3*p/2 - 2049] ^= pat[i] >> 8; | |
435 | oob[3*p/2 - 2048] ^= pat[i]; | |
436 | } | |
437 | } else if ((p & 1) == 1) { | |
438 | buf[3*p/2] ^= pat[i] >> 4; | |
439 | buf[3*p/2 + 1] ^= pat[i] << 4; | |
440 | } else { | |
441 | buf[3*p/2 - 1] ^= pat[i] >> 8; | |
442 | buf[3*p/2] ^= pat[i]; | |
443 | } | |
c9ac5977 | 444 | } |
04459d7c | 445 | |
8c61b7a7 | 446 | if (n < 0) { |
be8444bd DW |
447 | dev_dbg(&cafe->pdev->dev, "Failed to correct ECC at %08x\n", |
448 | cafe_readl(cafe, NAND_ADDR2) * 2048); | |
8c61b7a7 | 449 | for (i = 0; i < 0x5c; i += 4) |
be8444bd | 450 | printk("Register %x: %08x\n", i, readl(cafe->mmio + i)); |
04459d7c DW |
451 | mtd->ecc_stats.failed++; |
452 | } else { | |
8c61b7a7 SB |
453 | dev_dbg(&cafe->pdev->dev, "Corrected %d symbol errors\n", n); |
454 | mtd->ecc_stats.corrected += n; | |
3f91e94f | 455 | max_bitflips = max_t(unsigned int, max_bitflips, n); |
04459d7c DW |
456 | } |
457 | } | |
458 | ||
3f91e94f | 459 | return max_bitflips; |
5467fb02 DW |
460 | } |
461 | ||
a8ed6e66 BB |
462 | static int cafe_ooblayout_ecc(struct mtd_info *mtd, int section, |
463 | struct mtd_oob_region *oobregion) | |
464 | { | |
465 | struct nand_chip *chip = mtd_to_nand(mtd); | |
466 | ||
467 | if (section) | |
468 | return -ERANGE; | |
469 | ||
470 | oobregion->offset = 0; | |
471 | oobregion->length = chip->ecc.total; | |
472 | ||
473 | return 0; | |
474 | } | |
475 | ||
476 | static int cafe_ooblayout_free(struct mtd_info *mtd, int section, | |
477 | struct mtd_oob_region *oobregion) | |
478 | { | |
479 | struct nand_chip *chip = mtd_to_nand(mtd); | |
480 | ||
481 | if (section) | |
482 | return -ERANGE; | |
483 | ||
484 | oobregion->offset = chip->ecc.total; | |
485 | oobregion->length = mtd->oobsize - chip->ecc.total; | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
490 | static const struct mtd_ooblayout_ops cafe_ooblayout_ops = { | |
491 | .ecc = cafe_ooblayout_ecc, | |
492 | .free = cafe_ooblayout_free, | |
8dd851de DW |
493 | }; |
494 | ||
c9ac5977 | 495 | /* Ick. The BBT code really ought to be able to work this bit out |
fbad5696 DW |
496 | for itself from the above, at least for the 2KiB case */ |
497 | static uint8_t cafe_bbt_pattern_2048[] = { 'B', 'b', 't', '0' }; | |
498 | static uint8_t cafe_mirror_pattern_2048[] = { '1', 't', 'b', 'B' }; | |
499 | ||
500 | static uint8_t cafe_bbt_pattern_512[] = { 0xBB }; | |
501 | static uint8_t cafe_mirror_pattern_512[] = { 0xBC }; | |
502 | ||
8dd851de DW |
503 | |
504 | static struct nand_bbt_descr cafe_bbt_main_descr_2048 = { | |
505 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
048c37b4 | 506 | | NAND_BBT_2BIT | NAND_BBT_VERSION, |
8dd851de DW |
507 | .offs = 14, |
508 | .len = 4, | |
509 | .veroffs = 18, | |
510 | .maxblocks = 4, | |
fbad5696 | 511 | .pattern = cafe_bbt_pattern_2048 |
8dd851de DW |
512 | }; |
513 | ||
514 | static struct nand_bbt_descr cafe_bbt_mirror_descr_2048 = { | |
515 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
048c37b4 | 516 | | NAND_BBT_2BIT | NAND_BBT_VERSION, |
8dd851de DW |
517 | .offs = 14, |
518 | .len = 4, | |
519 | .veroffs = 18, | |
520 | .maxblocks = 4, | |
fbad5696 | 521 | .pattern = cafe_mirror_pattern_2048 |
8dd851de DW |
522 | }; |
523 | ||
fbad5696 DW |
524 | static struct nand_bbt_descr cafe_bbt_main_descr_512 = { |
525 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
048c37b4 | 526 | | NAND_BBT_2BIT | NAND_BBT_VERSION, |
fbad5696 DW |
527 | .offs = 14, |
528 | .len = 1, | |
529 | .veroffs = 15, | |
530 | .maxblocks = 4, | |
531 | .pattern = cafe_bbt_pattern_512 | |
532 | }; | |
533 | ||
534 | static struct nand_bbt_descr cafe_bbt_mirror_descr_512 = { | |
535 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | |
048c37b4 | 536 | | NAND_BBT_2BIT | NAND_BBT_VERSION, |
fbad5696 DW |
537 | .offs = 14, |
538 | .len = 1, | |
539 | .veroffs = 15, | |
540 | .maxblocks = 4, | |
541 | .pattern = cafe_mirror_pattern_512 | |
542 | }; | |
543 | ||
544 | ||
fdbad98d | 545 | static int cafe_nand_write_page_lowlevel(struct mtd_info *mtd, |
1fbb938d | 546 | struct nand_chip *chip, |
45aaeff9 BB |
547 | const uint8_t *buf, int oob_required, |
548 | int page) | |
5467fb02 | 549 | { |
d699ed25 | 550 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
5467fb02 | 551 | |
5467fb02 | 552 | chip->write_buf(mtd, buf, mtd->writesize); |
8dd851de | 553 | chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); |
5467fb02 DW |
554 | |
555 | /* Set up ECC autogeneration */ | |
cad40654 | 556 | cafe->ctl2 |= (1<<30); |
fdbad98d JW |
557 | |
558 | return 0; | |
5467fb02 DW |
559 | } |
560 | ||
9f3e0429 | 561 | static int cafe_nand_block_bad(struct mtd_info *mtd, loff_t ofs) |
8dd851de DW |
562 | { |
563 | return 0; | |
564 | } | |
5467fb02 | 565 | |
8c61b7a7 | 566 | /* F_2[X]/(X**6+X+1) */ |
06f25510 | 567 | static unsigned short gf64_mul(u8 a, u8 b) |
8c61b7a7 SB |
568 | { |
569 | u8 c; | |
570 | unsigned int i; | |
571 | ||
572 | c = 0; | |
573 | for (i = 0; i < 6; i++) { | |
574 | if (a & 1) | |
575 | c ^= b; | |
576 | a >>= 1; | |
577 | b <<= 1; | |
578 | if ((b & 0x40) != 0) | |
579 | b ^= 0x43; | |
580 | } | |
581 | ||
582 | return c; | |
583 | } | |
584 | ||
585 | /* F_64[X]/(X**2+X+A**-1) with A the generator of F_64[X] */ | |
06f25510 | 586 | static u16 gf4096_mul(u16 a, u16 b) |
8c61b7a7 SB |
587 | { |
588 | u8 ah, al, bh, bl, ch, cl; | |
589 | ||
590 | ah = a >> 6; | |
591 | al = a & 0x3f; | |
592 | bh = b >> 6; | |
593 | bl = b & 0x3f; | |
594 | ||
595 | ch = gf64_mul(ah ^ al, bh ^ bl) ^ gf64_mul(al, bl); | |
596 | cl = gf64_mul(gf64_mul(ah, bh), 0x21) ^ gf64_mul(al, bl); | |
597 | ||
598 | return (ch << 6) ^ cl; | |
599 | } | |
600 | ||
06f25510 | 601 | static int cafe_mul(int x) |
8c61b7a7 SB |
602 | { |
603 | if (x == 0) | |
604 | return 1; | |
605 | return gf4096_mul(x, 0xe01); | |
606 | } | |
607 | ||
06f25510 | 608 | static int cafe_nand_probe(struct pci_dev *pdev, |
5467fb02 DW |
609 | const struct pci_device_id *ent) |
610 | { | |
611 | struct mtd_info *mtd; | |
612 | struct cafe_priv *cafe; | |
613 | uint32_t ctrl; | |
614 | int err = 0; | |
f02ea4e6 HS |
615 | int old_dma; |
616 | struct nand_buffers *nbuf; | |
5467fb02 | 617 | |
06ed24e5 DW |
618 | /* Very old versions shared the same PCI ident for all three |
619 | functions on the chip. Verify the class too... */ | |
620 | if ((pdev->class >> 8) != PCI_CLASS_MEMORY_FLASH) | |
621 | return -ENODEV; | |
622 | ||
5467fb02 DW |
623 | err = pci_enable_device(pdev); |
624 | if (err) | |
625 | return err; | |
626 | ||
627 | pci_set_master(pdev); | |
628 | ||
e787dfd1 BB |
629 | cafe = kzalloc(sizeof(*cafe), GFP_KERNEL); |
630 | if (!cafe) | |
5467fb02 | 631 | return -ENOMEM; |
5467fb02 | 632 | |
e787dfd1 | 633 | mtd = nand_to_mtd(&cafe->nand); |
c451c7c4 | 634 | mtd->dev.parent = &pdev->dev; |
d699ed25 | 635 | nand_set_controller_data(&cafe->nand, cafe); |
5467fb02 DW |
636 | |
637 | cafe->pdev = pdev; | |
638 | cafe->mmio = pci_iomap(pdev, 0, 0); | |
639 | if (!cafe->mmio) { | |
640 | dev_warn(&pdev->dev, "failed to iomap\n"); | |
641 | err = -ENOMEM; | |
642 | goto out_free_mtd; | |
643 | } | |
5467fb02 | 644 | |
8c61b7a7 SB |
645 | cafe->rs = init_rs_non_canonical(12, &cafe_mul, 0, 1, 8); |
646 | if (!cafe->rs) { | |
647 | err = -ENOMEM; | |
648 | goto out_ior; | |
649 | } | |
650 | ||
5467fb02 DW |
651 | cafe->nand.cmdfunc = cafe_nand_cmdfunc; |
652 | cafe->nand.dev_ready = cafe_device_ready; | |
653 | cafe->nand.read_byte = cafe_read_byte; | |
654 | cafe->nand.read_buf = cafe_read_buf; | |
655 | cafe->nand.write_buf = cafe_write_buf; | |
656 | cafe->nand.select_chip = cafe_select_chip; | |
657 | ||
658 | cafe->nand.chip_delay = 0; | |
659 | ||
660 | /* Enable the following for a flash based bad block table */ | |
bb9ebd4e | 661 | cafe->nand.bbt_options = NAND_BBT_USE_FLASH; |
1826dbcc | 662 | cafe->nand.options = NAND_OWN_BUFFERS; |
8dd851de DW |
663 | |
664 | if (skipbbt) { | |
665 | cafe->nand.options |= NAND_SKIP_BBTSCAN; | |
666 | cafe->nand.block_bad = cafe_nand_block_bad; | |
667 | } | |
c9ac5977 | 668 | |
527a4f45 DW |
669 | if (numtimings && numtimings != 3) { |
670 | dev_warn(&cafe->pdev->dev, "%d timing register values ignored; precisely three are required\n", numtimings); | |
671 | } | |
672 | ||
673 | if (numtimings == 3) { | |
527a4f45 | 674 | cafe_dev_dbg(&cafe->pdev->dev, "Using provided timings (%08x %08x %08x)\n", |
8e5368a1 | 675 | timing[0], timing[1], timing[2]); |
527a4f45 | 676 | } else { |
8e5368a1 DW |
677 | timing[0] = cafe_readl(cafe, NAND_TIMING1); |
678 | timing[1] = cafe_readl(cafe, NAND_TIMING2); | |
679 | timing[2] = cafe_readl(cafe, NAND_TIMING3); | |
527a4f45 | 680 | |
8e5368a1 DW |
681 | if (timing[0] | timing[1] | timing[2]) { |
682 | cafe_dev_dbg(&cafe->pdev->dev, "Timing registers already set (%08x %08x %08x)\n", | |
683 | timing[0], timing[1], timing[2]); | |
527a4f45 DW |
684 | } else { |
685 | dev_warn(&cafe->pdev->dev, "Timing registers unset; using most conservative defaults\n"); | |
8e5368a1 | 686 | timing[0] = timing[1] = timing[2] = 0xffffffff; |
527a4f45 DW |
687 | } |
688 | } | |
689 | ||
dcc41bc8 | 690 | /* Start off by resetting the NAND controller completely */ |
195a253b DW |
691 | cafe_writel(cafe, 1, NAND_RESET); |
692 | cafe_writel(cafe, 0, NAND_RESET); | |
dcc41bc8 | 693 | |
8e5368a1 DW |
694 | cafe_writel(cafe, timing[0], NAND_TIMING1); |
695 | cafe_writel(cafe, timing[1], NAND_TIMING2); | |
696 | cafe_writel(cafe, timing[2], NAND_TIMING3); | |
b478c775 | 697 | |
195a253b | 698 | cafe_writel(cafe, 0xffffffff, NAND_IRQ_MASK); |
2db6346f TG |
699 | err = request_irq(pdev->irq, &cafe_nand_interrupt, IRQF_SHARED, |
700 | "CAFE NAND", mtd); | |
5467fb02 DW |
701 | if (err) { |
702 | dev_warn(&pdev->dev, "Could not register IRQ %d\n", pdev->irq); | |
f02ea4e6 | 703 | goto out_ior; |
5467fb02 | 704 | } |
f7c37d7b | 705 | |
5467fb02 | 706 | /* Disable master reset, enable NAND clock */ |
195a253b | 707 | ctrl = cafe_readl(cafe, GLOBAL_CTRL); |
5467fb02 DW |
708 | ctrl &= 0xffffeff0; |
709 | ctrl |= 0x00007000; | |
195a253b DW |
710 | cafe_writel(cafe, ctrl | 0x05, GLOBAL_CTRL); |
711 | cafe_writel(cafe, ctrl | 0x0a, GLOBAL_CTRL); | |
712 | cafe_writel(cafe, 0, NAND_DMA_CTRL); | |
5467fb02 | 713 | |
195a253b DW |
714 | cafe_writel(cafe, 0x7006, GLOBAL_CTRL); |
715 | cafe_writel(cafe, 0x700a, GLOBAL_CTRL); | |
5467fb02 | 716 | |
f02ea4e6 HS |
717 | /* Enable NAND IRQ in global IRQ mask register */ |
718 | cafe_writel(cafe, 0x80000007, GLOBAL_IRQ_MASK); | |
719 | cafe_dev_dbg(&cafe->pdev->dev, "Control %x, IRQ mask %x\n", | |
720 | cafe_readl(cafe, GLOBAL_CTRL), | |
721 | cafe_readl(cafe, GLOBAL_IRQ_MASK)); | |
722 | ||
723 | /* Do not use the DMA for the nand_scan_ident() */ | |
724 | old_dma = usedma; | |
725 | usedma = 0; | |
726 | ||
727 | /* Scan to find existence of the device */ | |
728 | if (nand_scan_ident(mtd, 2, NULL)) { | |
729 | err = -ENXIO; | |
730 | goto out_irq; | |
731 | } | |
732 | ||
733 | cafe->dmabuf = dma_alloc_coherent(&cafe->pdev->dev, | |
734 | 2112 + sizeof(struct nand_buffers) + | |
735 | mtd->writesize + mtd->oobsize, | |
736 | &cafe->dmaaddr, GFP_KERNEL); | |
737 | if (!cafe->dmabuf) { | |
738 | err = -ENOMEM; | |
739 | goto out_irq; | |
740 | } | |
741 | cafe->nand.buffers = nbuf = (void *)cafe->dmabuf + 2112; | |
742 | ||
5467fb02 | 743 | /* Set up DMA address */ |
195a253b | 744 | cafe_writel(cafe, cafe->dmaaddr & 0xffffffff, NAND_DMA_ADDR0); |
5467fb02 | 745 | if (sizeof(cafe->dmaaddr) > 4) |
fbad5696 | 746 | /* Shift in two parts to shut the compiler up */ |
195a253b | 747 | cafe_writel(cafe, (cafe->dmaaddr >> 16) >> 16, NAND_DMA_ADDR1); |
5467fb02 | 748 | else |
195a253b | 749 | cafe_writel(cafe, 0, NAND_DMA_ADDR1); |
fbad5696 | 750 | |
8dd851de | 751 | cafe_dev_dbg(&cafe->pdev->dev, "Set DMA address to %x (virt %p)\n", |
195a253b | 752 | cafe_readl(cafe, NAND_DMA_ADDR0), cafe->dmabuf); |
5467fb02 | 753 | |
f02ea4e6 HS |
754 | /* this driver does not need the @ecccalc and @ecccode */ |
755 | nbuf->ecccalc = NULL; | |
756 | nbuf->ecccode = NULL; | |
757 | nbuf->databuf = (uint8_t *)(nbuf + 1); | |
f7c37d7b | 758 | |
f02ea4e6 HS |
759 | /* Restore the DMA flag */ |
760 | usedma = old_dma; | |
5467fb02 DW |
761 | |
762 | cafe->ctl2 = 1<<27; /* Reed-Solomon ECC */ | |
763 | if (mtd->writesize == 2048) | |
764 | cafe->ctl2 |= 1<<29; /* 2KiB page size */ | |
765 | ||
766 | /* Set up ECC according to the type of chip we found */ | |
a8ed6e66 | 767 | mtd_set_ooblayout(mtd, &cafe_ooblayout_ops); |
fbad5696 | 768 | if (mtd->writesize == 2048) { |
8dd851de DW |
769 | cafe->nand.bbt_td = &cafe_bbt_main_descr_2048; |
770 | cafe->nand.bbt_md = &cafe_bbt_mirror_descr_2048; | |
fbad5696 | 771 | } else if (mtd->writesize == 512) { |
fbad5696 DW |
772 | cafe->nand.bbt_td = &cafe_bbt_main_descr_512; |
773 | cafe->nand.bbt_md = &cafe_bbt_mirror_descr_512; | |
5467fb02 | 774 | } else { |
fbad5696 | 775 | printk(KERN_WARNING "Unexpected NAND flash writesize %d. Aborting\n", |
5467fb02 | 776 | mtd->writesize); |
f02ea4e6 | 777 | goto out_free_dma; |
5467fb02 | 778 | } |
fbad5696 DW |
779 | cafe->nand.ecc.mode = NAND_ECC_HW_SYNDROME; |
780 | cafe->nand.ecc.size = mtd->writesize; | |
781 | cafe->nand.ecc.bytes = 14; | |
6a918bad | 782 | cafe->nand.ecc.strength = 4; |
fbad5696 DW |
783 | cafe->nand.ecc.hwctl = (void *)cafe_nand_bug; |
784 | cafe->nand.ecc.calculate = (void *)cafe_nand_bug; | |
785 | cafe->nand.ecc.correct = (void *)cafe_nand_bug; | |
fbad5696 DW |
786 | cafe->nand.ecc.write_page = cafe_nand_write_page_lowlevel; |
787 | cafe->nand.ecc.write_oob = cafe_nand_write_oob; | |
788 | cafe->nand.ecc.read_page = cafe_nand_read_page; | |
789 | cafe->nand.ecc.read_oob = cafe_nand_read_oob; | |
5467fb02 DW |
790 | |
791 | err = nand_scan_tail(mtd); | |
792 | if (err) | |
f02ea4e6 | 793 | goto out_free_dma; |
5467fb02 | 794 | |
5467fb02 | 795 | pci_set_drvdata(pdev, mtd); |
9c37f332 | 796 | |
68874414 | 797 | mtd->name = "cafe_nand"; |
42d7fbe2 | 798 | mtd_device_parse_register(mtd, part_probes, NULL, NULL, 0); |
4d32de81 | 799 | |
5467fb02 DW |
800 | goto out; |
801 | ||
f02ea4e6 HS |
802 | out_free_dma: |
803 | dma_free_coherent(&cafe->pdev->dev, | |
804 | 2112 + sizeof(struct nand_buffers) + | |
805 | mtd->writesize + mtd->oobsize, | |
806 | cafe->dmabuf, cafe->dmaaddr); | |
5467fb02 DW |
807 | out_irq: |
808 | /* Disable NAND IRQ in global IRQ mask register */ | |
195a253b | 809 | cafe_writel(cafe, ~1 & cafe_readl(cafe, GLOBAL_IRQ_MASK), GLOBAL_IRQ_MASK); |
5467fb02 | 810 | free_irq(pdev->irq, mtd); |
5467fb02 DW |
811 | out_ior: |
812 | pci_iounmap(pdev, cafe->mmio); | |
813 | out_free_mtd: | |
e787dfd1 | 814 | kfree(cafe); |
5467fb02 DW |
815 | out: |
816 | return err; | |
817 | } | |
818 | ||
810b7e06 | 819 | static void cafe_nand_remove(struct pci_dev *pdev) |
5467fb02 DW |
820 | { |
821 | struct mtd_info *mtd = pci_get_drvdata(pdev); | |
4bd4ebcc | 822 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 823 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
5467fb02 | 824 | |
5467fb02 | 825 | /* Disable NAND IRQ in global IRQ mask register */ |
195a253b | 826 | cafe_writel(cafe, ~1 & cafe_readl(cafe, GLOBAL_IRQ_MASK), GLOBAL_IRQ_MASK); |
5467fb02 DW |
827 | free_irq(pdev->irq, mtd); |
828 | nand_release(mtd); | |
8c61b7a7 | 829 | free_rs(cafe->rs); |
5467fb02 | 830 | pci_iounmap(pdev, cafe->mmio); |
f02ea4e6 HS |
831 | dma_free_coherent(&cafe->pdev->dev, |
832 | 2112 + sizeof(struct nand_buffers) + | |
833 | mtd->writesize + mtd->oobsize, | |
834 | cafe->dmabuf, cafe->dmaaddr); | |
e787dfd1 | 835 | kfree(cafe); |
5467fb02 DW |
836 | } |
837 | ||
377ace08 | 838 | static const struct pci_device_id cafe_nand_tbl[] = { |
514fca43 DW |
839 | { PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_88ALP01_NAND, |
840 | PCI_ANY_ID, PCI_ANY_ID }, | |
06ed24e5 | 841 | { } |
5467fb02 DW |
842 | }; |
843 | ||
844 | MODULE_DEVICE_TABLE(pci, cafe_nand_tbl); | |
845 | ||
1fcf8ce5 DW |
846 | static int cafe_nand_resume(struct pci_dev *pdev) |
847 | { | |
848 | uint32_t ctrl; | |
849 | struct mtd_info *mtd = pci_get_drvdata(pdev); | |
4bd4ebcc | 850 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 851 | struct cafe_priv *cafe = nand_get_controller_data(chip); |
1fcf8ce5 DW |
852 | |
853 | /* Start off by resetting the NAND controller completely */ | |
854 | cafe_writel(cafe, 1, NAND_RESET); | |
855 | cafe_writel(cafe, 0, NAND_RESET); | |
856 | cafe_writel(cafe, 0xffffffff, NAND_IRQ_MASK); | |
857 | ||
858 | /* Restore timing configuration */ | |
859 | cafe_writel(cafe, timing[0], NAND_TIMING1); | |
860 | cafe_writel(cafe, timing[1], NAND_TIMING2); | |
861 | cafe_writel(cafe, timing[2], NAND_TIMING3); | |
862 | ||
863 | /* Disable master reset, enable NAND clock */ | |
864 | ctrl = cafe_readl(cafe, GLOBAL_CTRL); | |
865 | ctrl &= 0xffffeff0; | |
866 | ctrl |= 0x00007000; | |
867 | cafe_writel(cafe, ctrl | 0x05, GLOBAL_CTRL); | |
868 | cafe_writel(cafe, ctrl | 0x0a, GLOBAL_CTRL); | |
869 | cafe_writel(cafe, 0, NAND_DMA_CTRL); | |
870 | cafe_writel(cafe, 0x7006, GLOBAL_CTRL); | |
871 | cafe_writel(cafe, 0x700a, GLOBAL_CTRL); | |
872 | ||
873 | /* Set up DMA address */ | |
874 | cafe_writel(cafe, cafe->dmaaddr & 0xffffffff, NAND_DMA_ADDR0); | |
875 | if (sizeof(cafe->dmaaddr) > 4) | |
876 | /* Shift in two parts to shut the compiler up */ | |
877 | cafe_writel(cafe, (cafe->dmaaddr >> 16) >> 16, NAND_DMA_ADDR1); | |
878 | else | |
879 | cafe_writel(cafe, 0, NAND_DMA_ADDR1); | |
880 | ||
881 | /* Enable NAND IRQ in global IRQ mask register */ | |
882 | cafe_writel(cafe, 0x80000007, GLOBAL_IRQ_MASK); | |
883 | return 0; | |
884 | } | |
885 | ||
5467fb02 DW |
886 | static struct pci_driver cafe_nand_pci_driver = { |
887 | .name = "CAFÉ NAND", | |
888 | .id_table = cafe_nand_tbl, | |
889 | .probe = cafe_nand_probe, | |
5153b88c | 890 | .remove = cafe_nand_remove, |
5467fb02 | 891 | .resume = cafe_nand_resume, |
5467fb02 DW |
892 | }; |
893 | ||
4d16cd65 | 894 | module_pci_driver(cafe_nand_pci_driver); |
5467fb02 DW |
895 | |
896 | MODULE_LICENSE("GPL"); | |
897 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
f7c37d7b | 898 | MODULE_DESCRIPTION("NAND flash driver for OLPC CAFÉ chip"); |