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1fef62c1 BB |
1 | /* |
2 | * Copyright (C) 2013 Boris BREZILLON <b.brezillon.dev@gmail.com> | |
3 | * | |
4 | * Derived from: | |
5 | * https://github.com/yuq/sunxi-nfc-mtd | |
6 | * Copyright (C) 2013 Qiang Yu <yuq825@gmail.com> | |
7 | * | |
8 | * https://github.com/hno/Allwinner-Info | |
9 | * Copyright (C) 2013 Henrik Nordström <Henrik Nordström> | |
10 | * | |
11 | * Copyright (C) 2013 Dmitriy B. <rzk333@gmail.com> | |
12 | * Copyright (C) 2013 Sergey Lapin <slapin@ossfans.org> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | */ | |
24 | ||
25 | #include <linux/dma-mapping.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/moduleparam.h> | |
29 | #include <linux/platform_device.h> | |
30 | #include <linux/of.h> | |
31 | #include <linux/of_device.h> | |
32 | #include <linux/of_gpio.h> | |
1fef62c1 BB |
33 | #include <linux/mtd/mtd.h> |
34 | #include <linux/mtd/nand.h> | |
35 | #include <linux/mtd/partitions.h> | |
36 | #include <linux/clk.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/dmaengine.h> | |
39 | #include <linux/gpio.h> | |
40 | #include <linux/interrupt.h> | |
166f08c7 | 41 | #include <linux/iopoll.h> |
ab9d6a78 | 42 | #include <linux/reset.h> |
1fef62c1 BB |
43 | |
44 | #define NFC_REG_CTL 0x0000 | |
45 | #define NFC_REG_ST 0x0004 | |
46 | #define NFC_REG_INT 0x0008 | |
47 | #define NFC_REG_TIMING_CTL 0x000C | |
48 | #define NFC_REG_TIMING_CFG 0x0010 | |
49 | #define NFC_REG_ADDR_LOW 0x0014 | |
50 | #define NFC_REG_ADDR_HIGH 0x0018 | |
51 | #define NFC_REG_SECTOR_NUM 0x001C | |
52 | #define NFC_REG_CNT 0x0020 | |
53 | #define NFC_REG_CMD 0x0024 | |
54 | #define NFC_REG_RCMD_SET 0x0028 | |
55 | #define NFC_REG_WCMD_SET 0x002C | |
56 | #define NFC_REG_IO_DATA 0x0030 | |
57 | #define NFC_REG_ECC_CTL 0x0034 | |
58 | #define NFC_REG_ECC_ST 0x0038 | |
59 | #define NFC_REG_DEBUG 0x003C | |
b6a02c08 BB |
60 | #define NFC_REG_ECC_ERR_CNT(x) ((0x0040 + (x)) & ~0x3) |
61 | #define NFC_REG_USER_DATA(x) (0x0050 + ((x) * 4)) | |
1fef62c1 | 62 | #define NFC_REG_SPARE_AREA 0x00A0 |
4be4e03e | 63 | #define NFC_REG_PAT_ID 0x00A4 |
1fef62c1 BB |
64 | #define NFC_RAM0_BASE 0x0400 |
65 | #define NFC_RAM1_BASE 0x0800 | |
66 | ||
67 | /* define bit use in NFC_CTL */ | |
68 | #define NFC_EN BIT(0) | |
69 | #define NFC_RESET BIT(1) | |
b6a02c08 BB |
70 | #define NFC_BUS_WIDTH_MSK BIT(2) |
71 | #define NFC_BUS_WIDTH_8 (0 << 2) | |
72 | #define NFC_BUS_WIDTH_16 (1 << 2) | |
73 | #define NFC_RB_SEL_MSK BIT(3) | |
74 | #define NFC_RB_SEL(x) ((x) << 3) | |
75 | #define NFC_CE_SEL_MSK GENMASK(26, 24) | |
76 | #define NFC_CE_SEL(x) ((x) << 24) | |
1fef62c1 | 77 | #define NFC_CE_CTL BIT(6) |
b6a02c08 BB |
78 | #define NFC_PAGE_SHIFT_MSK GENMASK(11, 8) |
79 | #define NFC_PAGE_SHIFT(x) (((x) < 10 ? 0 : (x) - 10) << 8) | |
1fef62c1 BB |
80 | #define NFC_SAM BIT(12) |
81 | #define NFC_RAM_METHOD BIT(14) | |
82 | #define NFC_DEBUG_CTL BIT(31) | |
83 | ||
84 | /* define bit use in NFC_ST */ | |
85 | #define NFC_RB_B2R BIT(0) | |
86 | #define NFC_CMD_INT_FLAG BIT(1) | |
87 | #define NFC_DMA_INT_FLAG BIT(2) | |
88 | #define NFC_CMD_FIFO_STATUS BIT(3) | |
89 | #define NFC_STA BIT(4) | |
90 | #define NFC_NATCH_INT_FLAG BIT(5) | |
b6a02c08 | 91 | #define NFC_RB_STATE(x) BIT(x + 8) |
1fef62c1 BB |
92 | |
93 | /* define bit use in NFC_INT */ | |
94 | #define NFC_B2R_INT_ENABLE BIT(0) | |
95 | #define NFC_CMD_INT_ENABLE BIT(1) | |
96 | #define NFC_DMA_INT_ENABLE BIT(2) | |
97 | #define NFC_INT_MASK (NFC_B2R_INT_ENABLE | \ | |
98 | NFC_CMD_INT_ENABLE | \ | |
99 | NFC_DMA_INT_ENABLE) | |
100 | ||
d052e508 RS |
101 | /* define bit use in NFC_TIMING_CTL */ |
102 | #define NFC_TIMING_CTL_EDO BIT(8) | |
103 | ||
9c618292 RS |
104 | /* define NFC_TIMING_CFG register layout */ |
105 | #define NFC_TIMING_CFG(tWB, tADL, tWHR, tRHW, tCAD) \ | |
106 | (((tWB) & 0x3) | (((tADL) & 0x3) << 2) | \ | |
107 | (((tWHR) & 0x3) << 4) | (((tRHW) & 0x3) << 6) | \ | |
108 | (((tCAD) & 0x7) << 8)) | |
109 | ||
1fef62c1 | 110 | /* define bit use in NFC_CMD */ |
b6a02c08 BB |
111 | #define NFC_CMD_LOW_BYTE_MSK GENMASK(7, 0) |
112 | #define NFC_CMD_HIGH_BYTE_MSK GENMASK(15, 8) | |
113 | #define NFC_CMD(x) (x) | |
114 | #define NFC_ADR_NUM_MSK GENMASK(18, 16) | |
115 | #define NFC_ADR_NUM(x) (((x) - 1) << 16) | |
1fef62c1 BB |
116 | #define NFC_SEND_ADR BIT(19) |
117 | #define NFC_ACCESS_DIR BIT(20) | |
118 | #define NFC_DATA_TRANS BIT(21) | |
119 | #define NFC_SEND_CMD1 BIT(22) | |
120 | #define NFC_WAIT_FLAG BIT(23) | |
121 | #define NFC_SEND_CMD2 BIT(24) | |
122 | #define NFC_SEQ BIT(25) | |
123 | #define NFC_DATA_SWAP_METHOD BIT(26) | |
124 | #define NFC_ROW_AUTO_INC BIT(27) | |
125 | #define NFC_SEND_CMD3 BIT(28) | |
126 | #define NFC_SEND_CMD4 BIT(29) | |
b6a02c08 BB |
127 | #define NFC_CMD_TYPE_MSK GENMASK(31, 30) |
128 | #define NFC_NORMAL_OP (0 << 30) | |
129 | #define NFC_ECC_OP (1 << 30) | |
130 | #define NFC_PAGE_OP (2 << 30) | |
1fef62c1 BB |
131 | |
132 | /* define bit use in NFC_RCMD_SET */ | |
b6a02c08 BB |
133 | #define NFC_READ_CMD_MSK GENMASK(7, 0) |
134 | #define NFC_RND_READ_CMD0_MSK GENMASK(15, 8) | |
135 | #define NFC_RND_READ_CMD1_MSK GENMASK(23, 16) | |
1fef62c1 BB |
136 | |
137 | /* define bit use in NFC_WCMD_SET */ | |
b6a02c08 BB |
138 | #define NFC_PROGRAM_CMD_MSK GENMASK(7, 0) |
139 | #define NFC_RND_WRITE_CMD_MSK GENMASK(15, 8) | |
140 | #define NFC_READ_CMD0_MSK GENMASK(23, 16) | |
141 | #define NFC_READ_CMD1_MSK GENMASK(31, 24) | |
1fef62c1 BB |
142 | |
143 | /* define bit use in NFC_ECC_CTL */ | |
144 | #define NFC_ECC_EN BIT(0) | |
145 | #define NFC_ECC_PIPELINE BIT(3) | |
146 | #define NFC_ECC_EXCEPTION BIT(4) | |
b6a02c08 | 147 | #define NFC_ECC_BLOCK_SIZE_MSK BIT(5) |
f59dab8d | 148 | #define NFC_ECC_BLOCK_512 BIT(5) |
1fef62c1 BB |
149 | #define NFC_RANDOM_EN BIT(9) |
150 | #define NFC_RANDOM_DIRECTION BIT(10) | |
b6a02c08 BB |
151 | #define NFC_ECC_MODE_MSK GENMASK(15, 12) |
152 | #define NFC_ECC_MODE(x) ((x) << 12) | |
153 | #define NFC_RANDOM_SEED_MSK GENMASK(30, 16) | |
154 | #define NFC_RANDOM_SEED(x) ((x) << 16) | |
155 | ||
156 | /* define bit use in NFC_ECC_ST */ | |
157 | #define NFC_ECC_ERR(x) BIT(x) | |
614049a8 | 158 | #define NFC_ECC_ERR_MSK GENMASK(15, 0) |
b6a02c08 | 159 | #define NFC_ECC_PAT_FOUND(x) BIT(x + 16) |
f8b04746 | 160 | #define NFC_ECC_ERR_CNT(b, x) (((x) >> (((b) % 4) * 8)) & 0xff) |
1fef62c1 BB |
161 | |
162 | #define NFC_DEFAULT_TIMEOUT_MS 1000 | |
163 | ||
164 | #define NFC_SRAM_SIZE 1024 | |
165 | ||
166 | #define NFC_MAX_CS 7 | |
167 | ||
168 | /* | |
169 | * Ready/Busy detection type: describes the Ready/Busy detection modes | |
170 | * | |
171 | * @RB_NONE: no external detection available, rely on STATUS command | |
172 | * and software timeouts | |
173 | * @RB_NATIVE: use sunxi NAND controller Ready/Busy support. The Ready/Busy | |
174 | * pin of the NAND flash chip must be connected to one of the | |
175 | * native NAND R/B pins (those which can be muxed to the NAND | |
176 | * Controller) | |
177 | * @RB_GPIO: use a simple GPIO to handle Ready/Busy status. The Ready/Busy | |
178 | * pin of the NAND flash chip must be connected to a GPIO capable | |
179 | * pin. | |
180 | */ | |
181 | enum sunxi_nand_rb_type { | |
182 | RB_NONE, | |
183 | RB_NATIVE, | |
184 | RB_GPIO, | |
185 | }; | |
186 | ||
187 | /* | |
188 | * Ready/Busy structure: stores information related to Ready/Busy detection | |
189 | * | |
190 | * @type: the Ready/Busy detection mode | |
191 | * @info: information related to the R/B detection mode. Either a gpio | |
192 | * id or a native R/B id (those supported by the NAND controller). | |
193 | */ | |
194 | struct sunxi_nand_rb { | |
195 | enum sunxi_nand_rb_type type; | |
196 | union { | |
197 | int gpio; | |
198 | int nativeid; | |
199 | } info; | |
200 | }; | |
201 | ||
202 | /* | |
203 | * Chip Select structure: stores information related to NAND Chip Select | |
204 | * | |
205 | * @cs: the NAND CS id used to communicate with a NAND Chip | |
206 | * @rb: the Ready/Busy description | |
207 | */ | |
208 | struct sunxi_nand_chip_sel { | |
209 | u8 cs; | |
210 | struct sunxi_nand_rb rb; | |
211 | }; | |
212 | ||
213 | /* | |
214 | * sunxi HW ECC infos: stores information related to HW ECC support | |
215 | * | |
216 | * @mode: the sunxi ECC mode field deduced from ECC requirements | |
1fef62c1 BB |
217 | */ |
218 | struct sunxi_nand_hw_ecc { | |
219 | int mode; | |
1fef62c1 BB |
220 | }; |
221 | ||
222 | /* | |
223 | * NAND chip structure: stores NAND chip device related information | |
224 | * | |
225 | * @node: used to store NAND chips into a list | |
226 | * @nand: base NAND chip structure | |
227 | * @mtd: base MTD structure | |
228 | * @clk_rate: clk_rate required for this NAND chip | |
9c618292 | 229 | * @timing_cfg TIMING_CFG register value for this NAND chip |
1fef62c1 BB |
230 | * @selected: current active CS |
231 | * @nsels: number of CS lines required by the NAND chip | |
232 | * @sels: array of CS lines descriptions | |
233 | */ | |
234 | struct sunxi_nand_chip { | |
235 | struct list_head node; | |
236 | struct nand_chip nand; | |
1fef62c1 | 237 | unsigned long clk_rate; |
9c618292 | 238 | u32 timing_cfg; |
d052e508 | 239 | u32 timing_ctl; |
1fef62c1 | 240 | int selected; |
e9aa671f BB |
241 | int addr_cycles; |
242 | u32 addr[2]; | |
243 | int cmd_cycles; | |
244 | u8 cmd[2]; | |
1fef62c1 BB |
245 | int nsels; |
246 | struct sunxi_nand_chip_sel sels[0]; | |
247 | }; | |
248 | ||
249 | static inline struct sunxi_nand_chip *to_sunxi_nand(struct nand_chip *nand) | |
250 | { | |
251 | return container_of(nand, struct sunxi_nand_chip, nand); | |
252 | } | |
253 | ||
254 | /* | |
255 | * NAND Controller structure: stores sunxi NAND controller information | |
256 | * | |
257 | * @controller: base controller structure | |
258 | * @dev: parent device (used to print error messages) | |
259 | * @regs: NAND controller registers | |
260 | * @ahb_clk: NAND Controller AHB clock | |
261 | * @mod_clk: NAND Controller mod clock | |
262 | * @assigned_cs: bitmask describing already assigned CS lines | |
263 | * @clk_rate: NAND controller current clock rate | |
264 | * @chips: a list containing all the NAND chips attached to | |
265 | * this NAND controller | |
266 | * @complete: a completion object used to wait for NAND | |
267 | * controller events | |
268 | */ | |
269 | struct sunxi_nfc { | |
270 | struct nand_hw_control controller; | |
271 | struct device *dev; | |
272 | void __iomem *regs; | |
273 | struct clk *ahb_clk; | |
274 | struct clk *mod_clk; | |
ab9d6a78 | 275 | struct reset_control *reset; |
1fef62c1 BB |
276 | unsigned long assigned_cs; |
277 | unsigned long clk_rate; | |
278 | struct list_head chips; | |
279 | struct completion complete; | |
614049a8 | 280 | struct dma_chan *dmac; |
1fef62c1 BB |
281 | }; |
282 | ||
283 | static inline struct sunxi_nfc *to_sunxi_nfc(struct nand_hw_control *ctrl) | |
284 | { | |
285 | return container_of(ctrl, struct sunxi_nfc, controller); | |
286 | } | |
287 | ||
288 | static irqreturn_t sunxi_nfc_interrupt(int irq, void *dev_id) | |
289 | { | |
290 | struct sunxi_nfc *nfc = dev_id; | |
291 | u32 st = readl(nfc->regs + NFC_REG_ST); | |
292 | u32 ien = readl(nfc->regs + NFC_REG_INT); | |
293 | ||
294 | if (!(ien & st)) | |
295 | return IRQ_NONE; | |
296 | ||
297 | if ((ien & st) == ien) | |
298 | complete(&nfc->complete); | |
299 | ||
300 | writel(st & NFC_INT_MASK, nfc->regs + NFC_REG_ST); | |
301 | writel(~st & ien & NFC_INT_MASK, nfc->regs + NFC_REG_INT); | |
302 | ||
303 | return IRQ_HANDLED; | |
304 | } | |
305 | ||
c0c9dfa8 BB |
306 | static int sunxi_nfc_wait_events(struct sunxi_nfc *nfc, u32 events, |
307 | bool use_polling, unsigned int timeout_ms) | |
1fef62c1 | 308 | { |
c0c9dfa8 | 309 | int ret; |
1fef62c1 | 310 | |
c0c9dfa8 BB |
311 | if (events & ~NFC_INT_MASK) |
312 | return -EINVAL; | |
1fef62c1 BB |
313 | |
314 | if (!timeout_ms) | |
315 | timeout_ms = NFC_DEFAULT_TIMEOUT_MS; | |
316 | ||
c0c9dfa8 BB |
317 | if (!use_polling) { |
318 | init_completion(&nfc->complete); | |
319 | ||
320 | writel(events, nfc->regs + NFC_REG_INT); | |
321 | ||
322 | ret = wait_for_completion_timeout(&nfc->complete, | |
323 | msecs_to_jiffies(timeout_ms)); | |
324 | ||
325 | writel(0, nfc->regs + NFC_REG_INT); | |
326 | } else { | |
327 | u32 status; | |
328 | ||
329 | ret = readl_poll_timeout(nfc->regs + NFC_REG_ST, status, | |
330 | (status & events) == events, 1, | |
331 | timeout_ms * 1000); | |
1fef62c1 BB |
332 | } |
333 | ||
c0c9dfa8 BB |
334 | writel(events & NFC_INT_MASK, nfc->regs + NFC_REG_ST); |
335 | ||
336 | if (ret) | |
337 | dev_err(nfc->dev, "wait interrupt timedout\n"); | |
338 | ||
339 | return ret; | |
1fef62c1 BB |
340 | } |
341 | ||
342 | static int sunxi_nfc_wait_cmd_fifo_empty(struct sunxi_nfc *nfc) | |
343 | { | |
166f08c7 BB |
344 | u32 status; |
345 | int ret; | |
1fef62c1 | 346 | |
166f08c7 BB |
347 | ret = readl_poll_timeout(nfc->regs + NFC_REG_ST, status, |
348 | !(status & NFC_CMD_FIFO_STATUS), 1, | |
349 | NFC_DEFAULT_TIMEOUT_MS * 1000); | |
350 | if (ret) | |
351 | dev_err(nfc->dev, "wait for empty cmd FIFO timedout\n"); | |
1fef62c1 | 352 | |
166f08c7 | 353 | return ret; |
1fef62c1 BB |
354 | } |
355 | ||
356 | static int sunxi_nfc_rst(struct sunxi_nfc *nfc) | |
357 | { | |
166f08c7 BB |
358 | u32 ctl; |
359 | int ret; | |
1fef62c1 BB |
360 | |
361 | writel(0, nfc->regs + NFC_REG_ECC_CTL); | |
362 | writel(NFC_RESET, nfc->regs + NFC_REG_CTL); | |
363 | ||
166f08c7 BB |
364 | ret = readl_poll_timeout(nfc->regs + NFC_REG_CTL, ctl, |
365 | !(ctl & NFC_RESET), 1, | |
366 | NFC_DEFAULT_TIMEOUT_MS * 1000); | |
367 | if (ret) | |
368 | dev_err(nfc->dev, "wait for NAND controller reset timedout\n"); | |
1fef62c1 | 369 | |
166f08c7 | 370 | return ret; |
1fef62c1 BB |
371 | } |
372 | ||
614049a8 BB |
373 | static int sunxi_nfc_dma_op_prepare(struct mtd_info *mtd, const void *buf, |
374 | int chunksize, int nchunks, | |
375 | enum dma_data_direction ddir, | |
376 | struct scatterlist *sg) | |
377 | { | |
378 | struct nand_chip *nand = mtd_to_nand(mtd); | |
379 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); | |
380 | struct dma_async_tx_descriptor *dmad; | |
381 | enum dma_transfer_direction tdir; | |
382 | dma_cookie_t dmat; | |
383 | int ret; | |
384 | ||
385 | if (ddir == DMA_FROM_DEVICE) | |
386 | tdir = DMA_DEV_TO_MEM; | |
387 | else | |
388 | tdir = DMA_MEM_TO_DEV; | |
389 | ||
390 | sg_init_one(sg, buf, nchunks * chunksize); | |
391 | ret = dma_map_sg(nfc->dev, sg, 1, ddir); | |
392 | if (!ret) | |
393 | return -ENOMEM; | |
394 | ||
395 | dmad = dmaengine_prep_slave_sg(nfc->dmac, sg, 1, tdir, DMA_CTRL_ACK); | |
28f3d01e WY |
396 | if (!dmad) { |
397 | ret = -EINVAL; | |
614049a8 BB |
398 | goto err_unmap_buf; |
399 | } | |
400 | ||
401 | writel(readl(nfc->regs + NFC_REG_CTL) | NFC_RAM_METHOD, | |
402 | nfc->regs + NFC_REG_CTL); | |
403 | writel(nchunks, nfc->regs + NFC_REG_SECTOR_NUM); | |
404 | writel(chunksize, nfc->regs + NFC_REG_CNT); | |
405 | dmat = dmaengine_submit(dmad); | |
406 | ||
407 | ret = dma_submit_error(dmat); | |
408 | if (ret) | |
409 | goto err_clr_dma_flag; | |
410 | ||
411 | return 0; | |
412 | ||
413 | err_clr_dma_flag: | |
414 | writel(readl(nfc->regs + NFC_REG_CTL) & ~NFC_RAM_METHOD, | |
415 | nfc->regs + NFC_REG_CTL); | |
416 | ||
417 | err_unmap_buf: | |
418 | dma_unmap_sg(nfc->dev, sg, 1, ddir); | |
419 | return ret; | |
420 | } | |
421 | ||
422 | static void sunxi_nfc_dma_op_cleanup(struct mtd_info *mtd, | |
423 | enum dma_data_direction ddir, | |
424 | struct scatterlist *sg) | |
425 | { | |
426 | struct nand_chip *nand = mtd_to_nand(mtd); | |
427 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); | |
428 | ||
429 | dma_unmap_sg(nfc->dev, sg, 1, ddir); | |
430 | writel(readl(nfc->regs + NFC_REG_CTL) & ~NFC_RAM_METHOD, | |
431 | nfc->regs + NFC_REG_CTL); | |
432 | } | |
433 | ||
1fef62c1 BB |
434 | static int sunxi_nfc_dev_ready(struct mtd_info *mtd) |
435 | { | |
4bd4ebcc | 436 | struct nand_chip *nand = mtd_to_nand(mtd); |
1fef62c1 BB |
437 | struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand); |
438 | struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller); | |
439 | struct sunxi_nand_rb *rb; | |
1fef62c1 BB |
440 | int ret; |
441 | ||
442 | if (sunxi_nand->selected < 0) | |
443 | return 0; | |
444 | ||
445 | rb = &sunxi_nand->sels[sunxi_nand->selected].rb; | |
446 | ||
447 | switch (rb->type) { | |
448 | case RB_NATIVE: | |
1fef62c1 | 449 | ret = !!(readl(nfc->regs + NFC_REG_ST) & |
b6a02c08 | 450 | NFC_RB_STATE(rb->info.nativeid)); |
1fef62c1 BB |
451 | break; |
452 | case RB_GPIO: | |
453 | ret = gpio_get_value(rb->info.gpio); | |
454 | break; | |
455 | case RB_NONE: | |
456 | default: | |
457 | ret = 0; | |
458 | dev_err(nfc->dev, "cannot check R/B NAND status!\n"); | |
459 | break; | |
460 | } | |
461 | ||
462 | return ret; | |
463 | } | |
464 | ||
465 | static void sunxi_nfc_select_chip(struct mtd_info *mtd, int chip) | |
466 | { | |
4bd4ebcc | 467 | struct nand_chip *nand = mtd_to_nand(mtd); |
1fef62c1 BB |
468 | struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand); |
469 | struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller); | |
470 | struct sunxi_nand_chip_sel *sel; | |
471 | u32 ctl; | |
472 | ||
473 | if (chip > 0 && chip >= sunxi_nand->nsels) | |
474 | return; | |
475 | ||
476 | if (chip == sunxi_nand->selected) | |
477 | return; | |
478 | ||
479 | ctl = readl(nfc->regs + NFC_REG_CTL) & | |
b6a02c08 | 480 | ~(NFC_PAGE_SHIFT_MSK | NFC_CE_SEL_MSK | NFC_RB_SEL_MSK | NFC_EN); |
1fef62c1 BB |
481 | |
482 | if (chip >= 0) { | |
483 | sel = &sunxi_nand->sels[chip]; | |
484 | ||
b6a02c08 | 485 | ctl |= NFC_CE_SEL(sel->cs) | NFC_EN | |
68ffbf7f | 486 | NFC_PAGE_SHIFT(nand->page_shift); |
1fef62c1 BB |
487 | if (sel->rb.type == RB_NONE) { |
488 | nand->dev_ready = NULL; | |
489 | } else { | |
490 | nand->dev_ready = sunxi_nfc_dev_ready; | |
491 | if (sel->rb.type == RB_NATIVE) | |
b6a02c08 | 492 | ctl |= NFC_RB_SEL(sel->rb.info.nativeid); |
1fef62c1 BB |
493 | } |
494 | ||
495 | writel(mtd->writesize, nfc->regs + NFC_REG_SPARE_AREA); | |
496 | ||
497 | if (nfc->clk_rate != sunxi_nand->clk_rate) { | |
498 | clk_set_rate(nfc->mod_clk, sunxi_nand->clk_rate); | |
499 | nfc->clk_rate = sunxi_nand->clk_rate; | |
500 | } | |
501 | } | |
502 | ||
d052e508 | 503 | writel(sunxi_nand->timing_ctl, nfc->regs + NFC_REG_TIMING_CTL); |
9c618292 | 504 | writel(sunxi_nand->timing_cfg, nfc->regs + NFC_REG_TIMING_CFG); |
1fef62c1 BB |
505 | writel(ctl, nfc->regs + NFC_REG_CTL); |
506 | ||
507 | sunxi_nand->selected = chip; | |
508 | } | |
509 | ||
510 | static void sunxi_nfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) | |
511 | { | |
4bd4ebcc | 512 | struct nand_chip *nand = mtd_to_nand(mtd); |
1fef62c1 BB |
513 | struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand); |
514 | struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller); | |
515 | int ret; | |
516 | int cnt; | |
517 | int offs = 0; | |
518 | u32 tmp; | |
519 | ||
520 | while (len > offs) { | |
521 | cnt = min(len - offs, NFC_SRAM_SIZE); | |
522 | ||
523 | ret = sunxi_nfc_wait_cmd_fifo_empty(nfc); | |
524 | if (ret) | |
525 | break; | |
526 | ||
527 | writel(cnt, nfc->regs + NFC_REG_CNT); | |
528 | tmp = NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD; | |
529 | writel(tmp, nfc->regs + NFC_REG_CMD); | |
530 | ||
c0c9dfa8 | 531 | ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0); |
1fef62c1 BB |
532 | if (ret) |
533 | break; | |
534 | ||
535 | if (buf) | |
536 | memcpy_fromio(buf + offs, nfc->regs + NFC_RAM0_BASE, | |
537 | cnt); | |
538 | offs += cnt; | |
539 | } | |
540 | } | |
541 | ||
542 | static void sunxi_nfc_write_buf(struct mtd_info *mtd, const uint8_t *buf, | |
543 | int len) | |
544 | { | |
4bd4ebcc | 545 | struct nand_chip *nand = mtd_to_nand(mtd); |
1fef62c1 BB |
546 | struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand); |
547 | struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller); | |
548 | int ret; | |
549 | int cnt; | |
550 | int offs = 0; | |
551 | u32 tmp; | |
552 | ||
553 | while (len > offs) { | |
554 | cnt = min(len - offs, NFC_SRAM_SIZE); | |
555 | ||
556 | ret = sunxi_nfc_wait_cmd_fifo_empty(nfc); | |
557 | if (ret) | |
558 | break; | |
559 | ||
560 | writel(cnt, nfc->regs + NFC_REG_CNT); | |
561 | memcpy_toio(nfc->regs + NFC_RAM0_BASE, buf + offs, cnt); | |
562 | tmp = NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | | |
563 | NFC_ACCESS_DIR; | |
564 | writel(tmp, nfc->regs + NFC_REG_CMD); | |
565 | ||
c0c9dfa8 | 566 | ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0); |
1fef62c1 BB |
567 | if (ret) |
568 | break; | |
569 | ||
570 | offs += cnt; | |
571 | } | |
572 | } | |
573 | ||
574 | static uint8_t sunxi_nfc_read_byte(struct mtd_info *mtd) | |
575 | { | |
576 | uint8_t ret; | |
577 | ||
578 | sunxi_nfc_read_buf(mtd, &ret, 1); | |
579 | ||
580 | return ret; | |
581 | } | |
582 | ||
583 | static void sunxi_nfc_cmd_ctrl(struct mtd_info *mtd, int dat, | |
584 | unsigned int ctrl) | |
585 | { | |
4bd4ebcc | 586 | struct nand_chip *nand = mtd_to_nand(mtd); |
1fef62c1 BB |
587 | struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand); |
588 | struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller); | |
589 | int ret; | |
1fef62c1 BB |
590 | |
591 | ret = sunxi_nfc_wait_cmd_fifo_empty(nfc); | |
592 | if (ret) | |
593 | return; | |
594 | ||
e9aa671f BB |
595 | if (dat == NAND_CMD_NONE && (ctrl & NAND_NCE) && |
596 | !(ctrl & (NAND_CLE | NAND_ALE))) { | |
597 | u32 cmd = 0; | |
1fef62c1 | 598 | |
e9aa671f BB |
599 | if (!sunxi_nand->addr_cycles && !sunxi_nand->cmd_cycles) |
600 | return; | |
601 | ||
602 | if (sunxi_nand->cmd_cycles--) | |
603 | cmd |= NFC_SEND_CMD1 | sunxi_nand->cmd[0]; | |
604 | ||
605 | if (sunxi_nand->cmd_cycles--) { | |
606 | cmd |= NFC_SEND_CMD2; | |
607 | writel(sunxi_nand->cmd[1], | |
608 | nfc->regs + NFC_REG_RCMD_SET); | |
609 | } | |
610 | ||
611 | sunxi_nand->cmd_cycles = 0; | |
612 | ||
613 | if (sunxi_nand->addr_cycles) { | |
614 | cmd |= NFC_SEND_ADR | | |
615 | NFC_ADR_NUM(sunxi_nand->addr_cycles); | |
616 | writel(sunxi_nand->addr[0], | |
617 | nfc->regs + NFC_REG_ADDR_LOW); | |
618 | } | |
619 | ||
620 | if (sunxi_nand->addr_cycles > 4) | |
621 | writel(sunxi_nand->addr[1], | |
622 | nfc->regs + NFC_REG_ADDR_HIGH); | |
623 | ||
624 | writel(cmd, nfc->regs + NFC_REG_CMD); | |
625 | sunxi_nand->addr[0] = 0; | |
626 | sunxi_nand->addr[1] = 0; | |
627 | sunxi_nand->addr_cycles = 0; | |
c0c9dfa8 | 628 | sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0); |
1fef62c1 BB |
629 | } |
630 | ||
e9aa671f BB |
631 | if (ctrl & NAND_CLE) { |
632 | sunxi_nand->cmd[sunxi_nand->cmd_cycles++] = dat; | |
633 | } else if (ctrl & NAND_ALE) { | |
634 | sunxi_nand->addr[sunxi_nand->addr_cycles / 4] |= | |
635 | dat << ((sunxi_nand->addr_cycles % 4) * 8); | |
636 | sunxi_nand->addr_cycles++; | |
637 | } | |
1fef62c1 BB |
638 | } |
639 | ||
4be4e03e BB |
640 | /* These seed values have been extracted from Allwinner's BSP */ |
641 | static const u16 sunxi_nfc_randomizer_page_seeds[] = { | |
642 | 0x2b75, 0x0bd0, 0x5ca3, 0x62d1, 0x1c93, 0x07e9, 0x2162, 0x3a72, | |
643 | 0x0d67, 0x67f9, 0x1be7, 0x077d, 0x032f, 0x0dac, 0x2716, 0x2436, | |
644 | 0x7922, 0x1510, 0x3860, 0x5287, 0x480f, 0x4252, 0x1789, 0x5a2d, | |
645 | 0x2a49, 0x5e10, 0x437f, 0x4b4e, 0x2f45, 0x216e, 0x5cb7, 0x7130, | |
646 | 0x2a3f, 0x60e4, 0x4dc9, 0x0ef0, 0x0f52, 0x1bb9, 0x6211, 0x7a56, | |
647 | 0x226d, 0x4ea7, 0x6f36, 0x3692, 0x38bf, 0x0c62, 0x05eb, 0x4c55, | |
648 | 0x60f4, 0x728c, 0x3b6f, 0x2037, 0x7f69, 0x0936, 0x651a, 0x4ceb, | |
649 | 0x6218, 0x79f3, 0x383f, 0x18d9, 0x4f05, 0x5c82, 0x2912, 0x6f17, | |
650 | 0x6856, 0x5938, 0x1007, 0x61ab, 0x3e7f, 0x57c2, 0x542f, 0x4f62, | |
651 | 0x7454, 0x2eac, 0x7739, 0x42d4, 0x2f90, 0x435a, 0x2e52, 0x2064, | |
652 | 0x637c, 0x66ad, 0x2c90, 0x0bad, 0x759c, 0x0029, 0x0986, 0x7126, | |
653 | 0x1ca7, 0x1605, 0x386a, 0x27f5, 0x1380, 0x6d75, 0x24c3, 0x0f8e, | |
654 | 0x2b7a, 0x1418, 0x1fd1, 0x7dc1, 0x2d8e, 0x43af, 0x2267, 0x7da3, | |
655 | 0x4e3d, 0x1338, 0x50db, 0x454d, 0x764d, 0x40a3, 0x42e6, 0x262b, | |
656 | 0x2d2e, 0x1aea, 0x2e17, 0x173d, 0x3a6e, 0x71bf, 0x25f9, 0x0a5d, | |
657 | 0x7c57, 0x0fbe, 0x46ce, 0x4939, 0x6b17, 0x37bb, 0x3e91, 0x76db, | |
658 | }; | |
659 | ||
660 | /* | |
661 | * sunxi_nfc_randomizer_ecc512_seeds and sunxi_nfc_randomizer_ecc1024_seeds | |
662 | * have been generated using | |
663 | * sunxi_nfc_randomizer_step(seed, (step_size * 8) + 15), which is what | |
664 | * the randomizer engine does internally before de/scrambling OOB data. | |
665 | * | |
666 | * Those tables are statically defined to avoid calculating randomizer state | |
667 | * at runtime. | |
668 | */ | |
669 | static const u16 sunxi_nfc_randomizer_ecc512_seeds[] = { | |
670 | 0x3346, 0x367f, 0x1f18, 0x769a, 0x4f64, 0x068c, 0x2ef1, 0x6b64, | |
671 | 0x28a9, 0x15d7, 0x30f8, 0x3659, 0x53db, 0x7c5f, 0x71d4, 0x4409, | |
672 | 0x26eb, 0x03cc, 0x655d, 0x47d4, 0x4daa, 0x0877, 0x712d, 0x3617, | |
673 | 0x3264, 0x49aa, 0x7f9e, 0x588e, 0x4fbc, 0x7176, 0x7f91, 0x6c6d, | |
674 | 0x4b95, 0x5fb7, 0x3844, 0x4037, 0x0184, 0x081b, 0x0ee8, 0x5b91, | |
675 | 0x293d, 0x1f71, 0x0e6f, 0x402b, 0x5122, 0x1e52, 0x22be, 0x3d2d, | |
676 | 0x75bc, 0x7c60, 0x6291, 0x1a2f, 0x61d4, 0x74aa, 0x4140, 0x29ab, | |
677 | 0x472d, 0x2852, 0x017e, 0x15e8, 0x5ec2, 0x17cf, 0x7d0f, 0x06b8, | |
678 | 0x117a, 0x6b94, 0x789b, 0x3126, 0x6ac5, 0x5be7, 0x150f, 0x51f8, | |
679 | 0x7889, 0x0aa5, 0x663d, 0x77e8, 0x0b87, 0x3dcb, 0x360d, 0x218b, | |
680 | 0x512f, 0x7dc9, 0x6a4d, 0x630a, 0x3547, 0x1dd2, 0x5aea, 0x69a5, | |
681 | 0x7bfa, 0x5e4f, 0x1519, 0x6430, 0x3a0e, 0x5eb3, 0x5425, 0x0c7a, | |
682 | 0x5540, 0x3670, 0x63c1, 0x31e9, 0x5a39, 0x2de7, 0x5979, 0x2891, | |
683 | 0x1562, 0x014b, 0x5b05, 0x2756, 0x5a34, 0x13aa, 0x6cb5, 0x2c36, | |
684 | 0x5e72, 0x1306, 0x0861, 0x15ef, 0x1ee8, 0x5a37, 0x7ac4, 0x45dd, | |
685 | 0x44c4, 0x7266, 0x2f41, 0x3ccc, 0x045e, 0x7d40, 0x7c66, 0x0fa0, | |
686 | }; | |
687 | ||
688 | static const u16 sunxi_nfc_randomizer_ecc1024_seeds[] = { | |
689 | 0x2cf5, 0x35f1, 0x63a4, 0x5274, 0x2bd2, 0x778b, 0x7285, 0x32b6, | |
690 | 0x6a5c, 0x70d6, 0x757d, 0x6769, 0x5375, 0x1e81, 0x0cf3, 0x3982, | |
691 | 0x6787, 0x042a, 0x6c49, 0x1925, 0x56a8, 0x40a9, 0x063e, 0x7bd9, | |
692 | 0x4dbf, 0x55ec, 0x672e, 0x7334, 0x5185, 0x4d00, 0x232a, 0x7e07, | |
693 | 0x445d, 0x6b92, 0x528f, 0x4255, 0x53ba, 0x7d82, 0x2a2e, 0x3a4e, | |
694 | 0x75eb, 0x450c, 0x6844, 0x1b5d, 0x581a, 0x4cc6, 0x0379, 0x37b2, | |
695 | 0x419f, 0x0e92, 0x6b27, 0x5624, 0x01e3, 0x07c1, 0x44a5, 0x130c, | |
696 | 0x13e8, 0x5910, 0x0876, 0x60c5, 0x54e3, 0x5b7f, 0x2269, 0x509f, | |
697 | 0x7665, 0x36fd, 0x3e9a, 0x0579, 0x6295, 0x14ef, 0x0a81, 0x1bcc, | |
698 | 0x4b16, 0x64db, 0x0514, 0x4f07, 0x0591, 0x3576, 0x6853, 0x0d9e, | |
699 | 0x259f, 0x38b7, 0x64fb, 0x3094, 0x4693, 0x6ddd, 0x29bb, 0x0bc8, | |
700 | 0x3f47, 0x490e, 0x0c0e, 0x7933, 0x3c9e, 0x5840, 0x398d, 0x3e68, | |
701 | 0x4af1, 0x71f5, 0x57cf, 0x1121, 0x64eb, 0x3579, 0x15ac, 0x584d, | |
702 | 0x5f2a, 0x47e2, 0x6528, 0x6eac, 0x196e, 0x6b96, 0x0450, 0x0179, | |
703 | 0x609c, 0x06e1, 0x4626, 0x42c7, 0x273e, 0x486f, 0x0705, 0x1601, | |
704 | 0x145b, 0x407e, 0x062b, 0x57a5, 0x53f9, 0x5659, 0x4410, 0x3ccd, | |
705 | }; | |
706 | ||
707 | static u16 sunxi_nfc_randomizer_step(u16 state, int count) | |
708 | { | |
709 | state &= 0x7fff; | |
710 | ||
711 | /* | |
712 | * This loop is just a simple implementation of a Fibonacci LFSR using | |
713 | * the x16 + x15 + 1 polynomial. | |
714 | */ | |
715 | while (count--) | |
716 | state = ((state >> 1) | | |
717 | (((state ^ (state >> 1)) & 1) << 14)) & 0x7fff; | |
718 | ||
719 | return state; | |
720 | } | |
721 | ||
722 | static u16 sunxi_nfc_randomizer_state(struct mtd_info *mtd, int page, bool ecc) | |
723 | { | |
724 | const u16 *seeds = sunxi_nfc_randomizer_page_seeds; | |
46c135c2 | 725 | int mod = mtd_div_by_ws(mtd->erasesize, mtd); |
4be4e03e BB |
726 | |
727 | if (mod > ARRAY_SIZE(sunxi_nfc_randomizer_page_seeds)) | |
728 | mod = ARRAY_SIZE(sunxi_nfc_randomizer_page_seeds); | |
729 | ||
730 | if (ecc) { | |
731 | if (mtd->ecc_step_size == 512) | |
732 | seeds = sunxi_nfc_randomizer_ecc512_seeds; | |
733 | else | |
734 | seeds = sunxi_nfc_randomizer_ecc1024_seeds; | |
735 | } | |
736 | ||
737 | return seeds[page % mod]; | |
738 | } | |
739 | ||
740 | static void sunxi_nfc_randomizer_config(struct mtd_info *mtd, | |
741 | int page, bool ecc) | |
742 | { | |
f671a1f3 | 743 | struct nand_chip *nand = mtd_to_nand(mtd); |
4be4e03e BB |
744 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); |
745 | u32 ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL); | |
746 | u16 state; | |
747 | ||
748 | if (!(nand->options & NAND_NEED_SCRAMBLING)) | |
749 | return; | |
750 | ||
751 | ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL); | |
752 | state = sunxi_nfc_randomizer_state(mtd, page, ecc); | |
753 | ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_RANDOM_SEED_MSK; | |
754 | writel(ecc_ctl | NFC_RANDOM_SEED(state), nfc->regs + NFC_REG_ECC_CTL); | |
755 | } | |
756 | ||
757 | static void sunxi_nfc_randomizer_enable(struct mtd_info *mtd) | |
758 | { | |
f671a1f3 | 759 | struct nand_chip *nand = mtd_to_nand(mtd); |
4be4e03e BB |
760 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); |
761 | ||
762 | if (!(nand->options & NAND_NEED_SCRAMBLING)) | |
763 | return; | |
764 | ||
765 | writel(readl(nfc->regs + NFC_REG_ECC_CTL) | NFC_RANDOM_EN, | |
766 | nfc->regs + NFC_REG_ECC_CTL); | |
767 | } | |
768 | ||
769 | static void sunxi_nfc_randomizer_disable(struct mtd_info *mtd) | |
770 | { | |
f671a1f3 | 771 | struct nand_chip *nand = mtd_to_nand(mtd); |
4be4e03e BB |
772 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); |
773 | ||
774 | if (!(nand->options & NAND_NEED_SCRAMBLING)) | |
775 | return; | |
776 | ||
777 | writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_RANDOM_EN, | |
778 | nfc->regs + NFC_REG_ECC_CTL); | |
779 | } | |
780 | ||
781 | static void sunxi_nfc_randomize_bbm(struct mtd_info *mtd, int page, u8 *bbm) | |
782 | { | |
783 | u16 state = sunxi_nfc_randomizer_state(mtd, page, true); | |
784 | ||
785 | bbm[0] ^= state; | |
786 | bbm[1] ^= sunxi_nfc_randomizer_step(state, 8); | |
787 | } | |
788 | ||
789 | static void sunxi_nfc_randomizer_write_buf(struct mtd_info *mtd, | |
790 | const uint8_t *buf, int len, | |
791 | bool ecc, int page) | |
792 | { | |
793 | sunxi_nfc_randomizer_config(mtd, page, ecc); | |
794 | sunxi_nfc_randomizer_enable(mtd); | |
795 | sunxi_nfc_write_buf(mtd, buf, len); | |
796 | sunxi_nfc_randomizer_disable(mtd); | |
797 | } | |
798 | ||
799 | static void sunxi_nfc_randomizer_read_buf(struct mtd_info *mtd, uint8_t *buf, | |
800 | int len, bool ecc, int page) | |
801 | { | |
802 | sunxi_nfc_randomizer_config(mtd, page, ecc); | |
803 | sunxi_nfc_randomizer_enable(mtd); | |
804 | sunxi_nfc_read_buf(mtd, buf, len); | |
805 | sunxi_nfc_randomizer_disable(mtd); | |
806 | } | |
807 | ||
c9118ece BB |
808 | static void sunxi_nfc_hw_ecc_enable(struct mtd_info *mtd) |
809 | { | |
4bd4ebcc | 810 | struct nand_chip *nand = mtd_to_nand(mtd); |
c9118ece BB |
811 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); |
812 | struct sunxi_nand_hw_ecc *data = nand->ecc.priv; | |
813 | u32 ecc_ctl; | |
814 | ||
815 | ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL); | |
816 | ecc_ctl &= ~(NFC_ECC_MODE_MSK | NFC_ECC_PIPELINE | | |
817 | NFC_ECC_BLOCK_SIZE_MSK); | |
336de7b1 BB |
818 | ecc_ctl |= NFC_ECC_EN | NFC_ECC_MODE(data->mode) | NFC_ECC_EXCEPTION | |
819 | NFC_ECC_PIPELINE; | |
c9118ece | 820 | |
f59dab8d BB |
821 | if (nand->ecc.size == 512) |
822 | ecc_ctl |= NFC_ECC_BLOCK_512; | |
823 | ||
c9118ece BB |
824 | writel(ecc_ctl, nfc->regs + NFC_REG_ECC_CTL); |
825 | } | |
826 | ||
827 | static void sunxi_nfc_hw_ecc_disable(struct mtd_info *mtd) | |
828 | { | |
4bd4ebcc | 829 | struct nand_chip *nand = mtd_to_nand(mtd); |
c9118ece BB |
830 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); |
831 | ||
832 | writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_ECC_EN, | |
833 | nfc->regs + NFC_REG_ECC_CTL); | |
834 | } | |
835 | ||
f363e0fa BB |
836 | static inline void sunxi_nfc_user_data_to_buf(u32 user_data, u8 *buf) |
837 | { | |
838 | buf[0] = user_data; | |
839 | buf[1] = user_data >> 8; | |
840 | buf[2] = user_data >> 16; | |
841 | buf[3] = user_data >> 24; | |
842 | } | |
843 | ||
cc6822fb BB |
844 | static inline u32 sunxi_nfc_buf_to_user_data(const u8 *buf) |
845 | { | |
846 | return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24); | |
847 | } | |
848 | ||
849 | static void sunxi_nfc_hw_ecc_get_prot_oob_bytes(struct mtd_info *mtd, u8 *oob, | |
850 | int step, bool bbm, int page) | |
851 | { | |
852 | struct nand_chip *nand = mtd_to_nand(mtd); | |
853 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); | |
854 | ||
855 | sunxi_nfc_user_data_to_buf(readl(nfc->regs + NFC_REG_USER_DATA(step)), | |
856 | oob); | |
857 | ||
858 | /* De-randomize the Bad Block Marker. */ | |
859 | if (bbm && (nand->options & NAND_NEED_SCRAMBLING)) | |
860 | sunxi_nfc_randomize_bbm(mtd, page, oob); | |
861 | } | |
862 | ||
863 | static void sunxi_nfc_hw_ecc_set_prot_oob_bytes(struct mtd_info *mtd, | |
864 | const u8 *oob, int step, | |
865 | bool bbm, int page) | |
866 | { | |
867 | struct nand_chip *nand = mtd_to_nand(mtd); | |
868 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); | |
869 | u8 user_data[4]; | |
870 | ||
871 | /* Randomize the Bad Block Marker. */ | |
872 | if (bbm && (nand->options & NAND_NEED_SCRAMBLING)) { | |
873 | memcpy(user_data, oob, sizeof(user_data)); | |
874 | sunxi_nfc_randomize_bbm(mtd, page, user_data); | |
875 | oob = user_data; | |
876 | } | |
877 | ||
878 | writel(sunxi_nfc_buf_to_user_data(oob), | |
879 | nfc->regs + NFC_REG_USER_DATA(step)); | |
880 | } | |
881 | ||
882 | static void sunxi_nfc_hw_ecc_update_stats(struct mtd_info *mtd, | |
883 | unsigned int *max_bitflips, int ret) | |
884 | { | |
885 | if (ret < 0) { | |
886 | mtd->ecc_stats.failed++; | |
887 | } else { | |
888 | mtd->ecc_stats.corrected += ret; | |
889 | *max_bitflips = max_t(unsigned int, *max_bitflips, ret); | |
890 | } | |
891 | } | |
892 | ||
893 | static int sunxi_nfc_hw_ecc_correct(struct mtd_info *mtd, u8 *data, u8 *oob, | |
614049a8 | 894 | int step, u32 status, bool *erased) |
cc6822fb BB |
895 | { |
896 | struct nand_chip *nand = mtd_to_nand(mtd); | |
897 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); | |
898 | struct nand_ecc_ctrl *ecc = &nand->ecc; | |
614049a8 | 899 | u32 tmp; |
cc6822fb BB |
900 | |
901 | *erased = false; | |
902 | ||
cc6822fb BB |
903 | if (status & NFC_ECC_ERR(step)) |
904 | return -EBADMSG; | |
905 | ||
906 | if (status & NFC_ECC_PAT_FOUND(step)) { | |
907 | u8 pattern; | |
908 | ||
909 | if (unlikely(!(readl(nfc->regs + NFC_REG_PAT_ID) & 0x1))) { | |
910 | pattern = 0x0; | |
911 | } else { | |
912 | pattern = 0xff; | |
913 | *erased = true; | |
914 | } | |
915 | ||
916 | if (data) | |
917 | memset(data, pattern, ecc->size); | |
918 | ||
919 | if (oob) | |
920 | memset(oob, pattern, ecc->bytes + 4); | |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
925 | tmp = readl(nfc->regs + NFC_REG_ECC_ERR_CNT(step)); | |
926 | ||
927 | return NFC_ECC_ERR_CNT(step, tmp); | |
928 | } | |
929 | ||
913821bd BB |
930 | static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd, |
931 | u8 *data, int data_off, | |
932 | u8 *oob, int oob_off, | |
933 | int *cur_off, | |
4be4e03e | 934 | unsigned int *max_bitflips, |
828dec15 | 935 | bool bbm, bool oob_required, int page) |
913821bd | 936 | { |
4bd4ebcc | 937 | struct nand_chip *nand = mtd_to_nand(mtd); |
913821bd BB |
938 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); |
939 | struct nand_ecc_ctrl *ecc = &nand->ecc; | |
4be4e03e | 940 | int raw_mode = 0; |
cc6822fb | 941 | bool erased; |
913821bd BB |
942 | int ret; |
943 | ||
944 | if (*cur_off != data_off) | |
945 | nand->cmdfunc(mtd, NAND_CMD_RNDOUT, data_off, -1); | |
946 | ||
4be4e03e | 947 | sunxi_nfc_randomizer_read_buf(mtd, NULL, ecc->size, false, page); |
913821bd | 948 | |
74eb9ff5 | 949 | if (data_off + ecc->size != oob_off) |
913821bd BB |
950 | nand->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_off, -1); |
951 | ||
952 | ret = sunxi_nfc_wait_cmd_fifo_empty(nfc); | |
953 | if (ret) | |
954 | return ret; | |
955 | ||
4be4e03e | 956 | sunxi_nfc_randomizer_enable(mtd); |
913821bd BB |
957 | writel(NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | NFC_ECC_OP, |
958 | nfc->regs + NFC_REG_CMD); | |
959 | ||
c0c9dfa8 | 960 | ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0); |
4be4e03e | 961 | sunxi_nfc_randomizer_disable(mtd); |
913821bd BB |
962 | if (ret) |
963 | return ret; | |
964 | ||
4be4e03e BB |
965 | *cur_off = oob_off + ecc->bytes + 4; |
966 | ||
828dec15 | 967 | ret = sunxi_nfc_hw_ecc_correct(mtd, data, oob_required ? oob : NULL, 0, |
614049a8 | 968 | readl(nfc->regs + NFC_REG_ECC_ST), |
828dec15 | 969 | &erased); |
cc6822fb | 970 | if (erased) |
4be4e03e | 971 | return 1; |
913821bd | 972 | |
cc6822fb | 973 | if (ret < 0) { |
4be4e03e BB |
974 | /* |
975 | * Re-read the data with the randomizer disabled to identify | |
976 | * bitflips in erased pages. | |
977 | */ | |
978 | if (nand->options & NAND_NEED_SCRAMBLING) { | |
979 | nand->cmdfunc(mtd, NAND_CMD_RNDOUT, data_off, -1); | |
980 | nand->read_buf(mtd, data, ecc->size); | |
cc6822fb BB |
981 | } else { |
982 | memcpy_fromio(data, nfc->regs + NFC_RAM0_BASE, | |
983 | ecc->size); | |
4be4e03e BB |
984 | } |
985 | ||
cc6822fb BB |
986 | nand->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_off, -1); |
987 | nand->read_buf(mtd, oob, ecc->bytes + 4); | |
988 | ||
146b503e BB |
989 | ret = nand_check_erased_ecc_chunk(data, ecc->size, |
990 | oob, ecc->bytes + 4, | |
991 | NULL, 0, ecc->strength); | |
4be4e03e BB |
992 | if (ret >= 0) |
993 | raw_mode = 1; | |
f363e0fa | 994 | } else { |
cc6822fb | 995 | memcpy_fromio(data, nfc->regs + NFC_RAM0_BASE, ecc->size); |
4be4e03e | 996 | |
828dec15 BB |
997 | if (oob_required) { |
998 | nand->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_off, -1); | |
999 | sunxi_nfc_randomizer_read_buf(mtd, oob, ecc->bytes + 4, | |
1000 | true, page); | |
913821bd | 1001 | |
828dec15 BB |
1002 | sunxi_nfc_hw_ecc_get_prot_oob_bytes(mtd, oob, 0, |
1003 | bbm, page); | |
1004 | } | |
913821bd BB |
1005 | } |
1006 | ||
cc6822fb BB |
1007 | sunxi_nfc_hw_ecc_update_stats(mtd, max_bitflips, ret); |
1008 | ||
4be4e03e | 1009 | return raw_mode; |
913821bd BB |
1010 | } |
1011 | ||
35d0e24f | 1012 | static void sunxi_nfc_hw_ecc_read_extra_oob(struct mtd_info *mtd, |
4be4e03e BB |
1013 | u8 *oob, int *cur_off, |
1014 | bool randomize, int page) | |
35d0e24f | 1015 | { |
4bd4ebcc | 1016 | struct nand_chip *nand = mtd_to_nand(mtd); |
35d0e24f BB |
1017 | struct nand_ecc_ctrl *ecc = &nand->ecc; |
1018 | int offset = ((ecc->bytes + 4) * ecc->steps); | |
1019 | int len = mtd->oobsize - offset; | |
1020 | ||
1021 | if (len <= 0) | |
1022 | return; | |
1023 | ||
c4f3ef2c | 1024 | if (!cur_off || *cur_off != offset) |
35d0e24f BB |
1025 | nand->cmdfunc(mtd, NAND_CMD_RNDOUT, |
1026 | offset + mtd->writesize, -1); | |
1027 | ||
4be4e03e BB |
1028 | if (!randomize) |
1029 | sunxi_nfc_read_buf(mtd, oob + offset, len); | |
1030 | else | |
1031 | sunxi_nfc_randomizer_read_buf(mtd, oob + offset, len, | |
1032 | false, page); | |
35d0e24f | 1033 | |
c4f3ef2c BB |
1034 | if (cur_off) |
1035 | *cur_off = mtd->oobsize + mtd->writesize; | |
35d0e24f BB |
1036 | } |
1037 | ||
614049a8 BB |
1038 | static int sunxi_nfc_hw_ecc_read_chunks_dma(struct mtd_info *mtd, uint8_t *buf, |
1039 | int oob_required, int page, | |
1040 | int nchunks) | |
1041 | { | |
1042 | struct nand_chip *nand = mtd_to_nand(mtd); | |
1043 | bool randomized = nand->options & NAND_NEED_SCRAMBLING; | |
1044 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); | |
1045 | struct nand_ecc_ctrl *ecc = &nand->ecc; | |
1046 | unsigned int max_bitflips = 0; | |
1047 | int ret, i, raw_mode = 0; | |
1048 | struct scatterlist sg; | |
1049 | u32 status; | |
1050 | ||
1051 | ret = sunxi_nfc_wait_cmd_fifo_empty(nfc); | |
1052 | if (ret) | |
1053 | return ret; | |
1054 | ||
1055 | ret = sunxi_nfc_dma_op_prepare(mtd, buf, ecc->size, nchunks, | |
1056 | DMA_FROM_DEVICE, &sg); | |
1057 | if (ret) | |
1058 | return ret; | |
1059 | ||
1060 | sunxi_nfc_hw_ecc_enable(mtd); | |
1061 | sunxi_nfc_randomizer_config(mtd, page, false); | |
1062 | sunxi_nfc_randomizer_enable(mtd); | |
1063 | ||
1064 | writel((NAND_CMD_RNDOUTSTART << 16) | (NAND_CMD_RNDOUT << 8) | | |
1065 | NAND_CMD_READSTART, nfc->regs + NFC_REG_RCMD_SET); | |
1066 | ||
1067 | dma_async_issue_pending(nfc->dmac); | |
1068 | ||
1069 | writel(NFC_PAGE_OP | NFC_DATA_SWAP_METHOD | NFC_DATA_TRANS, | |
1070 | nfc->regs + NFC_REG_CMD); | |
1071 | ||
1072 | ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0); | |
1073 | if (ret) | |
1074 | dmaengine_terminate_all(nfc->dmac); | |
1075 | ||
1076 | sunxi_nfc_randomizer_disable(mtd); | |
1077 | sunxi_nfc_hw_ecc_disable(mtd); | |
1078 | ||
1079 | sunxi_nfc_dma_op_cleanup(mtd, DMA_FROM_DEVICE, &sg); | |
1080 | ||
1081 | if (ret) | |
1082 | return ret; | |
1083 | ||
1084 | status = readl(nfc->regs + NFC_REG_ECC_ST); | |
1085 | ||
1086 | for (i = 0; i < nchunks; i++) { | |
1087 | int data_off = i * ecc->size; | |
1088 | int oob_off = i * (ecc->bytes + 4); | |
1089 | u8 *data = buf + data_off; | |
1090 | u8 *oob = nand->oob_poi + oob_off; | |
1091 | bool erased; | |
1092 | ||
1093 | ret = sunxi_nfc_hw_ecc_correct(mtd, randomized ? data : NULL, | |
1094 | oob_required ? oob : NULL, | |
1095 | i, status, &erased); | |
1096 | ||
1097 | /* ECC errors are handled in the second loop. */ | |
1098 | if (ret < 0) | |
1099 | continue; | |
1100 | ||
1101 | if (oob_required && !erased) { | |
1102 | /* TODO: use DMA to retrieve OOB */ | |
252173c6 BB |
1103 | nand->cmdfunc(mtd, NAND_CMD_RNDOUT, |
1104 | mtd->writesize + oob_off, -1); | |
614049a8 BB |
1105 | nand->read_buf(mtd, oob, ecc->bytes + 4); |
1106 | ||
1107 | sunxi_nfc_hw_ecc_get_prot_oob_bytes(mtd, oob, i, | |
1108 | !i, page); | |
1109 | } | |
1110 | ||
1111 | if (erased) | |
1112 | raw_mode = 1; | |
1113 | ||
1114 | sunxi_nfc_hw_ecc_update_stats(mtd, &max_bitflips, ret); | |
1115 | } | |
1116 | ||
1117 | if (status & NFC_ECC_ERR_MSK) { | |
1118 | for (i = 0; i < nchunks; i++) { | |
1119 | int data_off = i * ecc->size; | |
1120 | int oob_off = i * (ecc->bytes + 4); | |
1121 | u8 *data = buf + data_off; | |
1122 | u8 *oob = nand->oob_poi + oob_off; | |
1123 | ||
1124 | if (!(status & NFC_ECC_ERR(i))) | |
1125 | continue; | |
1126 | ||
1127 | /* | |
1128 | * Re-read the data with the randomizer disabled to | |
1129 | * identify bitflips in erased pages. | |
1130 | */ | |
1131 | if (randomized) { | |
1132 | /* TODO: use DMA to read page in raw mode */ | |
1133 | nand->cmdfunc(mtd, NAND_CMD_RNDOUT, | |
1134 | data_off, -1); | |
1135 | nand->read_buf(mtd, data, ecc->size); | |
1136 | } | |
1137 | ||
1138 | /* TODO: use DMA to retrieve OOB */ | |
252173c6 BB |
1139 | nand->cmdfunc(mtd, NAND_CMD_RNDOUT, |
1140 | mtd->writesize + oob_off, -1); | |
614049a8 BB |
1141 | nand->read_buf(mtd, oob, ecc->bytes + 4); |
1142 | ||
1143 | ret = nand_check_erased_ecc_chunk(data, ecc->size, | |
1144 | oob, ecc->bytes + 4, | |
1145 | NULL, 0, | |
1146 | ecc->strength); | |
1147 | if (ret >= 0) | |
1148 | raw_mode = 1; | |
1149 | ||
1150 | sunxi_nfc_hw_ecc_update_stats(mtd, &max_bitflips, ret); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | if (oob_required) | |
1155 | sunxi_nfc_hw_ecc_read_extra_oob(mtd, nand->oob_poi, | |
1156 | NULL, !raw_mode, | |
1157 | page); | |
1158 | ||
1159 | return max_bitflips; | |
1160 | } | |
1161 | ||
913821bd BB |
1162 | static int sunxi_nfc_hw_ecc_write_chunk(struct mtd_info *mtd, |
1163 | const u8 *data, int data_off, | |
1164 | const u8 *oob, int oob_off, | |
4be4e03e BB |
1165 | int *cur_off, bool bbm, |
1166 | int page) | |
913821bd | 1167 | { |
4bd4ebcc | 1168 | struct nand_chip *nand = mtd_to_nand(mtd); |
913821bd BB |
1169 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); |
1170 | struct nand_ecc_ctrl *ecc = &nand->ecc; | |
1171 | int ret; | |
1172 | ||
1173 | if (data_off != *cur_off) | |
1174 | nand->cmdfunc(mtd, NAND_CMD_RNDIN, data_off, -1); | |
1175 | ||
4be4e03e | 1176 | sunxi_nfc_randomizer_write_buf(mtd, data, ecc->size, false, page); |
913821bd | 1177 | |
74eb9ff5 | 1178 | if (data_off + ecc->size != oob_off) |
913821bd BB |
1179 | nand->cmdfunc(mtd, NAND_CMD_RNDIN, oob_off, -1); |
1180 | ||
1181 | ret = sunxi_nfc_wait_cmd_fifo_empty(nfc); | |
1182 | if (ret) | |
1183 | return ret; | |
1184 | ||
4be4e03e | 1185 | sunxi_nfc_randomizer_enable(mtd); |
cc6822fb BB |
1186 | sunxi_nfc_hw_ecc_set_prot_oob_bytes(mtd, oob, 0, bbm, page); |
1187 | ||
913821bd BB |
1188 | writel(NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | |
1189 | NFC_ACCESS_DIR | NFC_ECC_OP, | |
1190 | nfc->regs + NFC_REG_CMD); | |
1191 | ||
c0c9dfa8 | 1192 | ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0); |
4be4e03e | 1193 | sunxi_nfc_randomizer_disable(mtd); |
913821bd BB |
1194 | if (ret) |
1195 | return ret; | |
1196 | ||
1197 | *cur_off = oob_off + ecc->bytes + 4; | |
1198 | ||
1199 | return 0; | |
1200 | } | |
1201 | ||
35d0e24f | 1202 | static void sunxi_nfc_hw_ecc_write_extra_oob(struct mtd_info *mtd, |
4be4e03e BB |
1203 | u8 *oob, int *cur_off, |
1204 | int page) | |
35d0e24f | 1205 | { |
4bd4ebcc | 1206 | struct nand_chip *nand = mtd_to_nand(mtd); |
35d0e24f BB |
1207 | struct nand_ecc_ctrl *ecc = &nand->ecc; |
1208 | int offset = ((ecc->bytes + 4) * ecc->steps); | |
1209 | int len = mtd->oobsize - offset; | |
1210 | ||
1211 | if (len <= 0) | |
1212 | return; | |
1213 | ||
c4f3ef2c | 1214 | if (!cur_off || *cur_off != offset) |
35d0e24f BB |
1215 | nand->cmdfunc(mtd, NAND_CMD_RNDIN, |
1216 | offset + mtd->writesize, -1); | |
1217 | ||
4be4e03e | 1218 | sunxi_nfc_randomizer_write_buf(mtd, oob + offset, len, false, page); |
35d0e24f | 1219 | |
c4f3ef2c BB |
1220 | if (cur_off) |
1221 | *cur_off = mtd->oobsize + mtd->writesize; | |
35d0e24f BB |
1222 | } |
1223 | ||
1fef62c1 BB |
1224 | static int sunxi_nfc_hw_ecc_read_page(struct mtd_info *mtd, |
1225 | struct nand_chip *chip, uint8_t *buf, | |
1226 | int oob_required, int page) | |
1227 | { | |
1fef62c1 | 1228 | struct nand_ecc_ctrl *ecc = &chip->ecc; |
1fef62c1 | 1229 | unsigned int max_bitflips = 0; |
b462551c | 1230 | int ret, i, cur_off = 0; |
4be4e03e | 1231 | bool raw_mode = false; |
1fef62c1 | 1232 | |
c9118ece | 1233 | sunxi_nfc_hw_ecc_enable(mtd); |
1fef62c1 BB |
1234 | |
1235 | for (i = 0; i < ecc->steps; i++) { | |
b462551c BB |
1236 | int data_off = i * ecc->size; |
1237 | int oob_off = i * (ecc->bytes + 4); | |
1238 | u8 *data = buf + data_off; | |
1239 | u8 *oob = chip->oob_poi + oob_off; | |
1240 | ||
1241 | ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob, | |
1242 | oob_off + mtd->writesize, | |
4be4e03e | 1243 | &cur_off, &max_bitflips, |
828dec15 | 1244 | !i, oob_required, page); |
4be4e03e | 1245 | if (ret < 0) |
1fef62c1 | 1246 | return ret; |
4be4e03e BB |
1247 | else if (ret) |
1248 | raw_mode = true; | |
1fef62c1 BB |
1249 | } |
1250 | ||
35d0e24f | 1251 | if (oob_required) |
4be4e03e BB |
1252 | sunxi_nfc_hw_ecc_read_extra_oob(mtd, chip->oob_poi, &cur_off, |
1253 | !raw_mode, page); | |
1fef62c1 | 1254 | |
c9118ece | 1255 | sunxi_nfc_hw_ecc_disable(mtd); |
1fef62c1 BB |
1256 | |
1257 | return max_bitflips; | |
1258 | } | |
1259 | ||
614049a8 BB |
1260 | static int sunxi_nfc_hw_ecc_read_page_dma(struct mtd_info *mtd, |
1261 | struct nand_chip *chip, u8 *buf, | |
1262 | int oob_required, int page) | |
1263 | { | |
1264 | int ret; | |
1265 | ||
1266 | ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, oob_required, page, | |
1267 | chip->ecc.steps); | |
1268 | if (ret >= 0) | |
1269 | return ret; | |
1270 | ||
1271 | /* Fallback to PIO mode */ | |
1272 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, 0, -1); | |
1273 | ||
1274 | return sunxi_nfc_hw_ecc_read_page(mtd, chip, buf, oob_required, page); | |
1275 | } | |
1276 | ||
fe82ccef BB |
1277 | static int sunxi_nfc_hw_ecc_read_subpage(struct mtd_info *mtd, |
1278 | struct nand_chip *chip, | |
1279 | u32 data_offs, u32 readlen, | |
1280 | u8 *bufpoi, int page) | |
1281 | { | |
1282 | struct nand_ecc_ctrl *ecc = &chip->ecc; | |
1283 | int ret, i, cur_off = 0; | |
1284 | unsigned int max_bitflips = 0; | |
1285 | ||
1286 | sunxi_nfc_hw_ecc_enable(mtd); | |
1287 | ||
1288 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); | |
1289 | for (i = data_offs / ecc->size; | |
1290 | i < DIV_ROUND_UP(data_offs + readlen, ecc->size); i++) { | |
1291 | int data_off = i * ecc->size; | |
1292 | int oob_off = i * (ecc->bytes + 4); | |
1293 | u8 *data = bufpoi + data_off; | |
1294 | u8 *oob = chip->oob_poi + oob_off; | |
1295 | ||
1296 | ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, | |
1297 | oob, | |
1298 | oob_off + mtd->writesize, | |
828dec15 BB |
1299 | &cur_off, &max_bitflips, !i, |
1300 | false, page); | |
fe82ccef BB |
1301 | if (ret < 0) |
1302 | return ret; | |
1303 | } | |
1304 | ||
1305 | sunxi_nfc_hw_ecc_disable(mtd); | |
1306 | ||
1307 | return max_bitflips; | |
1308 | } | |
1309 | ||
614049a8 BB |
1310 | static int sunxi_nfc_hw_ecc_read_subpage_dma(struct mtd_info *mtd, |
1311 | struct nand_chip *chip, | |
1312 | u32 data_offs, u32 readlen, | |
1313 | u8 *buf, int page) | |
1314 | { | |
1315 | int nchunks = DIV_ROUND_UP(data_offs + readlen, chip->ecc.size); | |
1316 | int ret; | |
1317 | ||
1318 | ret = sunxi_nfc_hw_ecc_read_chunks_dma(mtd, buf, false, page, nchunks); | |
1319 | if (ret >= 0) | |
1320 | return ret; | |
1321 | ||
1322 | /* Fallback to PIO mode */ | |
1323 | chip->cmdfunc(mtd, NAND_CMD_RNDOUT, 0, -1); | |
1324 | ||
1325 | return sunxi_nfc_hw_ecc_read_subpage(mtd, chip, data_offs, readlen, | |
1326 | buf, page); | |
1327 | } | |
1328 | ||
1fef62c1 BB |
1329 | static int sunxi_nfc_hw_ecc_write_page(struct mtd_info *mtd, |
1330 | struct nand_chip *chip, | |
45aaeff9 BB |
1331 | const uint8_t *buf, int oob_required, |
1332 | int page) | |
1fef62c1 | 1333 | { |
1fef62c1 | 1334 | struct nand_ecc_ctrl *ecc = &chip->ecc; |
b462551c | 1335 | int ret, i, cur_off = 0; |
1fef62c1 | 1336 | |
c9118ece | 1337 | sunxi_nfc_hw_ecc_enable(mtd); |
1fef62c1 BB |
1338 | |
1339 | for (i = 0; i < ecc->steps; i++) { | |
b462551c BB |
1340 | int data_off = i * ecc->size; |
1341 | int oob_off = i * (ecc->bytes + 4); | |
1342 | const u8 *data = buf + data_off; | |
1343 | const u8 *oob = chip->oob_poi + oob_off; | |
1344 | ||
1345 | ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, oob, | |
1346 | oob_off + mtd->writesize, | |
4be4e03e | 1347 | &cur_off, !i, page); |
1fef62c1 BB |
1348 | if (ret) |
1349 | return ret; | |
1350 | } | |
1351 | ||
4be4e03e BB |
1352 | if (oob_required || (chip->options & NAND_NEED_SCRAMBLING)) |
1353 | sunxi_nfc_hw_ecc_write_extra_oob(mtd, chip->oob_poi, | |
1354 | &cur_off, page); | |
1fef62c1 | 1355 | |
c9118ece | 1356 | sunxi_nfc_hw_ecc_disable(mtd); |
1fef62c1 BB |
1357 | |
1358 | return 0; | |
1359 | } | |
1360 | ||
03b1d11a BB |
1361 | static int sunxi_nfc_hw_ecc_write_subpage(struct mtd_info *mtd, |
1362 | struct nand_chip *chip, | |
1363 | u32 data_offs, u32 data_len, | |
1364 | const u8 *buf, int oob_required, | |
1365 | int page) | |
1366 | { | |
1367 | struct nand_ecc_ctrl *ecc = &chip->ecc; | |
1368 | int ret, i, cur_off = 0; | |
1369 | ||
1370 | sunxi_nfc_hw_ecc_enable(mtd); | |
1371 | ||
1372 | for (i = data_offs / ecc->size; | |
1373 | i < DIV_ROUND_UP(data_offs + data_len, ecc->size); i++) { | |
1374 | int data_off = i * ecc->size; | |
1375 | int oob_off = i * (ecc->bytes + 4); | |
1376 | const u8 *data = buf + data_off; | |
1377 | const u8 *oob = chip->oob_poi + oob_off; | |
1378 | ||
1379 | ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, oob, | |
1380 | oob_off + mtd->writesize, | |
1381 | &cur_off, !i, page); | |
1382 | if (ret) | |
1383 | return ret; | |
1384 | } | |
1385 | ||
1386 | sunxi_nfc_hw_ecc_disable(mtd); | |
1387 | ||
1388 | return 0; | |
1389 | } | |
1390 | ||
614049a8 BB |
1391 | static int sunxi_nfc_hw_ecc_write_page_dma(struct mtd_info *mtd, |
1392 | struct nand_chip *chip, | |
1393 | const u8 *buf, | |
1394 | int oob_required, | |
1395 | int page) | |
1396 | { | |
1397 | struct nand_chip *nand = mtd_to_nand(mtd); | |
1398 | struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller); | |
1399 | struct nand_ecc_ctrl *ecc = &nand->ecc; | |
1400 | struct scatterlist sg; | |
1401 | int ret, i; | |
1402 | ||
1403 | ret = sunxi_nfc_wait_cmd_fifo_empty(nfc); | |
1404 | if (ret) | |
1405 | return ret; | |
1406 | ||
1407 | ret = sunxi_nfc_dma_op_prepare(mtd, buf, ecc->size, ecc->steps, | |
1408 | DMA_TO_DEVICE, &sg); | |
1409 | if (ret) | |
1410 | goto pio_fallback; | |
1411 | ||
1412 | for (i = 0; i < ecc->steps; i++) { | |
1413 | const u8 *oob = nand->oob_poi + (i * (ecc->bytes + 4)); | |
1414 | ||
1415 | sunxi_nfc_hw_ecc_set_prot_oob_bytes(mtd, oob, i, !i, page); | |
1416 | } | |
1417 | ||
1418 | sunxi_nfc_hw_ecc_enable(mtd); | |
1419 | sunxi_nfc_randomizer_config(mtd, page, false); | |
1420 | sunxi_nfc_randomizer_enable(mtd); | |
1421 | ||
1422 | writel((NAND_CMD_RNDIN << 8) | NAND_CMD_PAGEPROG, | |
1423 | nfc->regs + NFC_REG_RCMD_SET); | |
1424 | ||
1425 | dma_async_issue_pending(nfc->dmac); | |
1426 | ||
1427 | writel(NFC_PAGE_OP | NFC_DATA_SWAP_METHOD | | |
1428 | NFC_DATA_TRANS | NFC_ACCESS_DIR, | |
1429 | nfc->regs + NFC_REG_CMD); | |
1430 | ||
1431 | ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0); | |
1432 | if (ret) | |
1433 | dmaengine_terminate_all(nfc->dmac); | |
1434 | ||
1435 | sunxi_nfc_randomizer_disable(mtd); | |
1436 | sunxi_nfc_hw_ecc_disable(mtd); | |
1437 | ||
1438 | sunxi_nfc_dma_op_cleanup(mtd, DMA_TO_DEVICE, &sg); | |
1439 | ||
1440 | if (ret) | |
1441 | return ret; | |
1442 | ||
1443 | if (oob_required || (chip->options & NAND_NEED_SCRAMBLING)) | |
1444 | /* TODO: use DMA to transfer extra OOB bytes ? */ | |
1445 | sunxi_nfc_hw_ecc_write_extra_oob(mtd, chip->oob_poi, | |
1446 | NULL, page); | |
1447 | ||
1448 | return 0; | |
1449 | ||
1450 | pio_fallback: | |
1451 | return sunxi_nfc_hw_ecc_write_page(mtd, chip, buf, oob_required, page); | |
1452 | } | |
1453 | ||
1fef62c1 BB |
1454 | static int sunxi_nfc_hw_syndrome_ecc_read_page(struct mtd_info *mtd, |
1455 | struct nand_chip *chip, | |
1456 | uint8_t *buf, int oob_required, | |
1457 | int page) | |
1458 | { | |
1fef62c1 | 1459 | struct nand_ecc_ctrl *ecc = &chip->ecc; |
1fef62c1 | 1460 | unsigned int max_bitflips = 0; |
b462551c | 1461 | int ret, i, cur_off = 0; |
4be4e03e | 1462 | bool raw_mode = false; |
1fef62c1 | 1463 | |
c9118ece | 1464 | sunxi_nfc_hw_ecc_enable(mtd); |
1fef62c1 BB |
1465 | |
1466 | for (i = 0; i < ecc->steps; i++) { | |
b462551c BB |
1467 | int data_off = i * (ecc->size + ecc->bytes + 4); |
1468 | int oob_off = data_off + ecc->size; | |
1469 | u8 *data = buf + (i * ecc->size); | |
1470 | u8 *oob = chip->oob_poi + (i * (ecc->bytes + 4)); | |
1471 | ||
1472 | ret = sunxi_nfc_hw_ecc_read_chunk(mtd, data, data_off, oob, | |
1473 | oob_off, &cur_off, | |
828dec15 BB |
1474 | &max_bitflips, !i, |
1475 | oob_required, | |
1476 | page); | |
4be4e03e | 1477 | if (ret < 0) |
1fef62c1 | 1478 | return ret; |
4be4e03e BB |
1479 | else if (ret) |
1480 | raw_mode = true; | |
1fef62c1 BB |
1481 | } |
1482 | ||
35d0e24f | 1483 | if (oob_required) |
4be4e03e BB |
1484 | sunxi_nfc_hw_ecc_read_extra_oob(mtd, chip->oob_poi, &cur_off, |
1485 | !raw_mode, page); | |
1fef62c1 | 1486 | |
c9118ece | 1487 | sunxi_nfc_hw_ecc_disable(mtd); |
1fef62c1 BB |
1488 | |
1489 | return max_bitflips; | |
1490 | } | |
1491 | ||
1492 | static int sunxi_nfc_hw_syndrome_ecc_write_page(struct mtd_info *mtd, | |
1493 | struct nand_chip *chip, | |
1494 | const uint8_t *buf, | |
45aaeff9 | 1495 | int oob_required, int page) |
1fef62c1 | 1496 | { |
1fef62c1 | 1497 | struct nand_ecc_ctrl *ecc = &chip->ecc; |
b462551c | 1498 | int ret, i, cur_off = 0; |
1fef62c1 | 1499 | |
c9118ece | 1500 | sunxi_nfc_hw_ecc_enable(mtd); |
1fef62c1 BB |
1501 | |
1502 | for (i = 0; i < ecc->steps; i++) { | |
b462551c BB |
1503 | int data_off = i * (ecc->size + ecc->bytes + 4); |
1504 | int oob_off = data_off + ecc->size; | |
1505 | const u8 *data = buf + (i * ecc->size); | |
1506 | const u8 *oob = chip->oob_poi + (i * (ecc->bytes + 4)); | |
1fef62c1 | 1507 | |
b462551c | 1508 | ret = sunxi_nfc_hw_ecc_write_chunk(mtd, data, data_off, |
4be4e03e BB |
1509 | oob, oob_off, &cur_off, |
1510 | false, page); | |
1fef62c1 BB |
1511 | if (ret) |
1512 | return ret; | |
1fef62c1 BB |
1513 | } |
1514 | ||
4be4e03e BB |
1515 | if (oob_required || (chip->options & NAND_NEED_SCRAMBLING)) |
1516 | sunxi_nfc_hw_ecc_write_extra_oob(mtd, chip->oob_poi, | |
1517 | &cur_off, page); | |
1fef62c1 | 1518 | |
c9118ece | 1519 | sunxi_nfc_hw_ecc_disable(mtd); |
1fef62c1 BB |
1520 | |
1521 | return 0; | |
1522 | } | |
1523 | ||
1c1bdd6f BB |
1524 | static int sunxi_nfc_hw_common_ecc_read_oob(struct mtd_info *mtd, |
1525 | struct nand_chip *chip, | |
1526 | int page) | |
1527 | { | |
1528 | chip->cmdfunc(mtd, NAND_CMD_READ0, 0, page); | |
1529 | ||
1530 | chip->pagebuf = -1; | |
1531 | ||
1532 | return chip->ecc.read_page(mtd, chip, chip->buffers->databuf, 1, page); | |
1533 | } | |
1534 | ||
1535 | static int sunxi_nfc_hw_common_ecc_write_oob(struct mtd_info *mtd, | |
1536 | struct nand_chip *chip, | |
1537 | int page) | |
1538 | { | |
1539 | int ret, status; | |
1540 | ||
1541 | chip->cmdfunc(mtd, NAND_CMD_SEQIN, 0, page); | |
1542 | ||
1543 | chip->pagebuf = -1; | |
1544 | ||
1545 | memset(chip->buffers->databuf, 0xff, mtd->writesize); | |
1546 | ret = chip->ecc.write_page(mtd, chip, chip->buffers->databuf, 1, page); | |
1547 | if (ret) | |
1548 | return ret; | |
1549 | ||
1550 | /* Send command to program the OOB data */ | |
1551 | chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); | |
1552 | ||
1553 | status = chip->waitfunc(mtd, chip); | |
1554 | ||
1555 | return status & NAND_STATUS_FAIL ? -EIO : 0; | |
1556 | } | |
1557 | ||
9c618292 RS |
1558 | static const s32 tWB_lut[] = {6, 12, 16, 20}; |
1559 | static const s32 tRHW_lut[] = {4, 8, 12, 20}; | |
1560 | ||
1561 | static int _sunxi_nand_lookup_timing(const s32 *lut, int lut_size, u32 duration, | |
1562 | u32 clk_period) | |
1563 | { | |
1564 | u32 clk_cycles = DIV_ROUND_UP(duration, clk_period); | |
1565 | int i; | |
1566 | ||
1567 | for (i = 0; i < lut_size; i++) { | |
1568 | if (clk_cycles <= lut[i]) | |
1569 | return i; | |
1570 | } | |
1571 | ||
1572 | /* Doesn't fit */ | |
1573 | return -EINVAL; | |
1574 | } | |
1575 | ||
1576 | #define sunxi_nand_lookup_timing(l, p, c) \ | |
1577 | _sunxi_nand_lookup_timing(l, ARRAY_SIZE(l), p, c) | |
1578 | ||
907f45fb SH |
1579 | static int sunxi_nfc_setup_data_interface(struct mtd_info *mtd, |
1580 | const struct nand_data_interface *conf, | |
1581 | bool check_only) | |
1fef62c1 | 1582 | { |
907f45fb SH |
1583 | struct nand_chip *nand = mtd_to_nand(mtd); |
1584 | struct sunxi_nand_chip *chip = to_sunxi_nand(nand); | |
9c618292 | 1585 | struct sunxi_nfc *nfc = to_sunxi_nfc(chip->nand.controller); |
907f45fb | 1586 | const struct nand_sdr_timings *timings; |
1fef62c1 | 1587 | u32 min_clk_period = 0; |
9c618292 | 1588 | s32 tWB, tADL, tWHR, tRHW, tCAD; |
2d43457f | 1589 | long real_clk_rate; |
1fef62c1 | 1590 | |
907f45fb SH |
1591 | timings = nand_get_sdr_timings(conf); |
1592 | if (IS_ERR(timings)) | |
1593 | return -ENOTSUPP; | |
1594 | ||
1fef62c1 BB |
1595 | /* T1 <=> tCLS */ |
1596 | if (timings->tCLS_min > min_clk_period) | |
1597 | min_clk_period = timings->tCLS_min; | |
1598 | ||
1599 | /* T2 <=> tCLH */ | |
1600 | if (timings->tCLH_min > min_clk_period) | |
1601 | min_clk_period = timings->tCLH_min; | |
1602 | ||
1603 | /* T3 <=> tCS */ | |
1604 | if (timings->tCS_min > min_clk_period) | |
1605 | min_clk_period = timings->tCS_min; | |
1606 | ||
1607 | /* T4 <=> tCH */ | |
1608 | if (timings->tCH_min > min_clk_period) | |
1609 | min_clk_period = timings->tCH_min; | |
1610 | ||
1611 | /* T5 <=> tWP */ | |
1612 | if (timings->tWP_min > min_clk_period) | |
1613 | min_clk_period = timings->tWP_min; | |
1614 | ||
1615 | /* T6 <=> tWH */ | |
1616 | if (timings->tWH_min > min_clk_period) | |
1617 | min_clk_period = timings->tWH_min; | |
1618 | ||
1619 | /* T7 <=> tALS */ | |
1620 | if (timings->tALS_min > min_clk_period) | |
1621 | min_clk_period = timings->tALS_min; | |
1622 | ||
1623 | /* T8 <=> tDS */ | |
1624 | if (timings->tDS_min > min_clk_period) | |
1625 | min_clk_period = timings->tDS_min; | |
1626 | ||
1627 | /* T9 <=> tDH */ | |
1628 | if (timings->tDH_min > min_clk_period) | |
1629 | min_clk_period = timings->tDH_min; | |
1630 | ||
1631 | /* T10 <=> tRR */ | |
1632 | if (timings->tRR_min > (min_clk_period * 3)) | |
1633 | min_clk_period = DIV_ROUND_UP(timings->tRR_min, 3); | |
1634 | ||
1635 | /* T11 <=> tALH */ | |
1636 | if (timings->tALH_min > min_clk_period) | |
1637 | min_clk_period = timings->tALH_min; | |
1638 | ||
1639 | /* T12 <=> tRP */ | |
1640 | if (timings->tRP_min > min_clk_period) | |
1641 | min_clk_period = timings->tRP_min; | |
1642 | ||
1643 | /* T13 <=> tREH */ | |
1644 | if (timings->tREH_min > min_clk_period) | |
1645 | min_clk_period = timings->tREH_min; | |
1646 | ||
1647 | /* T14 <=> tRC */ | |
1648 | if (timings->tRC_min > (min_clk_period * 2)) | |
1649 | min_clk_period = DIV_ROUND_UP(timings->tRC_min, 2); | |
1650 | ||
1651 | /* T15 <=> tWC */ | |
1652 | if (timings->tWC_min > (min_clk_period * 2)) | |
1653 | min_clk_period = DIV_ROUND_UP(timings->tWC_min, 2); | |
1654 | ||
9c618292 | 1655 | /* T16 - T19 + tCAD */ |
5abcd95d BB |
1656 | if (timings->tWB_max > (min_clk_period * 20)) |
1657 | min_clk_period = DIV_ROUND_UP(timings->tWB_max, 20); | |
1658 | ||
1659 | if (timings->tADL_min > (min_clk_period * 32)) | |
1660 | min_clk_period = DIV_ROUND_UP(timings->tADL_min, 32); | |
1661 | ||
1662 | if (timings->tWHR_min > (min_clk_period * 32)) | |
1663 | min_clk_period = DIV_ROUND_UP(timings->tWHR_min, 32); | |
1664 | ||
1665 | if (timings->tRHW_min > (min_clk_period * 20)) | |
1666 | min_clk_period = DIV_ROUND_UP(timings->tRHW_min, 20); | |
1667 | ||
9c618292 RS |
1668 | tWB = sunxi_nand_lookup_timing(tWB_lut, timings->tWB_max, |
1669 | min_clk_period); | |
1670 | if (tWB < 0) { | |
1671 | dev_err(nfc->dev, "unsupported tWB\n"); | |
1672 | return tWB; | |
1673 | } | |
1674 | ||
1675 | tADL = DIV_ROUND_UP(timings->tADL_min, min_clk_period) >> 3; | |
1676 | if (tADL > 3) { | |
1677 | dev_err(nfc->dev, "unsupported tADL\n"); | |
1678 | return -EINVAL; | |
1679 | } | |
1680 | ||
1681 | tWHR = DIV_ROUND_UP(timings->tWHR_min, min_clk_period) >> 3; | |
1682 | if (tWHR > 3) { | |
1683 | dev_err(nfc->dev, "unsupported tWHR\n"); | |
1684 | return -EINVAL; | |
1685 | } | |
1686 | ||
1687 | tRHW = sunxi_nand_lookup_timing(tRHW_lut, timings->tRHW_min, | |
1688 | min_clk_period); | |
1689 | if (tRHW < 0) { | |
1690 | dev_err(nfc->dev, "unsupported tRHW\n"); | |
1691 | return tRHW; | |
1692 | } | |
1693 | ||
907f45fb SH |
1694 | if (check_only) |
1695 | return 0; | |
1696 | ||
9c618292 RS |
1697 | /* |
1698 | * TODO: according to ONFI specs this value only applies for DDR NAND, | |
1699 | * but Allwinner seems to set this to 0x7. Mimic them for now. | |
1700 | */ | |
1701 | tCAD = 0x7; | |
1702 | ||
1703 | /* TODO: A83 has some more bits for CDQSS, CS, CLHZ, CCS, WC */ | |
1704 | chip->timing_cfg = NFC_TIMING_CFG(tWB, tADL, tWHR, tRHW, tCAD); | |
1fef62c1 BB |
1705 | |
1706 | /* Convert min_clk_period from picoseconds to nanoseconds */ | |
1707 | min_clk_period = DIV_ROUND_UP(min_clk_period, 1000); | |
1708 | ||
1709 | /* | |
2f9992e0 BB |
1710 | * Unlike what is stated in Allwinner datasheet, the clk_rate should |
1711 | * be set to (1 / min_clk_period), and not (2 / min_clk_period). | |
1712 | * This new formula was verified with a scope and validated by | |
1713 | * Allwinner engineers. | |
1fef62c1 | 1714 | */ |
2f9992e0 | 1715 | chip->clk_rate = NSEC_PER_SEC / min_clk_period; |
2d43457f BB |
1716 | real_clk_rate = clk_round_rate(nfc->mod_clk, chip->clk_rate); |
1717 | ||
1718 | /* | |
1719 | * ONFI specification 3.1, paragraph 4.15.2 dictates that EDO data | |
1720 | * output cycle timings shall be used if the host drives tRC less than | |
1721 | * 30 ns. | |
1722 | */ | |
1723 | min_clk_period = NSEC_PER_SEC / real_clk_rate; | |
1724 | chip->timing_ctl = ((min_clk_period * 2) < 30) ? | |
1725 | NFC_TIMING_CTL_EDO : 0; | |
1fef62c1 | 1726 | |
1fef62c1 BB |
1727 | return 0; |
1728 | } | |
1729 | ||
c66811e6 BB |
1730 | static int sunxi_nand_ooblayout_ecc(struct mtd_info *mtd, int section, |
1731 | struct mtd_oob_region *oobregion) | |
1732 | { | |
1733 | struct nand_chip *nand = mtd_to_nand(mtd); | |
1734 | struct nand_ecc_ctrl *ecc = &nand->ecc; | |
1735 | ||
1736 | if (section >= ecc->steps) | |
1737 | return -ERANGE; | |
1738 | ||
1739 | oobregion->offset = section * (ecc->bytes + 4) + 4; | |
1740 | oobregion->length = ecc->bytes; | |
1741 | ||
1742 | return 0; | |
1743 | } | |
1744 | ||
1745 | static int sunxi_nand_ooblayout_free(struct mtd_info *mtd, int section, | |
1746 | struct mtd_oob_region *oobregion) | |
1747 | { | |
1748 | struct nand_chip *nand = mtd_to_nand(mtd); | |
1749 | struct nand_ecc_ctrl *ecc = &nand->ecc; | |
1750 | ||
1751 | if (section > ecc->steps) | |
1752 | return -ERANGE; | |
1753 | ||
1754 | /* | |
1755 | * The first 2 bytes are used for BB markers, hence we | |
1756 | * only have 2 bytes available in the first user data | |
1757 | * section. | |
1758 | */ | |
1759 | if (!section && ecc->mode == NAND_ECC_HW) { | |
1760 | oobregion->offset = 2; | |
1761 | oobregion->length = 2; | |
1762 | ||
1763 | return 0; | |
1764 | } | |
1765 | ||
1766 | oobregion->offset = section * (ecc->bytes + 4); | |
1767 | ||
1768 | if (section < ecc->steps) | |
1769 | oobregion->length = 4; | |
1770 | else | |
1771 | oobregion->offset = mtd->oobsize - oobregion->offset; | |
1772 | ||
1773 | return 0; | |
1774 | } | |
1775 | ||
1776 | static const struct mtd_ooblayout_ops sunxi_nand_ooblayout_ops = { | |
1777 | .ecc = sunxi_nand_ooblayout_ecc, | |
1778 | .free = sunxi_nand_ooblayout_free, | |
1779 | }; | |
1780 | ||
1fef62c1 BB |
1781 | static int sunxi_nand_hw_common_ecc_ctrl_init(struct mtd_info *mtd, |
1782 | struct nand_ecc_ctrl *ecc, | |
1783 | struct device_node *np) | |
1784 | { | |
1785 | static const u8 strengths[] = { 16, 24, 28, 32, 40, 48, 56, 60, 64 }; | |
4bd4ebcc | 1786 | struct nand_chip *nand = mtd_to_nand(mtd); |
1fef62c1 BB |
1787 | struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand); |
1788 | struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller); | |
1789 | struct sunxi_nand_hw_ecc *data; | |
1fef62c1 BB |
1790 | int nsectors; |
1791 | int ret; | |
1792 | int i; | |
1793 | ||
4796d865 BB |
1794 | if (ecc->options & NAND_ECC_MAXIMIZE) { |
1795 | int bytes; | |
1796 | ||
1797 | ecc->size = 1024; | |
1798 | nsectors = mtd->writesize / ecc->size; | |
1799 | ||
1800 | /* Reserve 2 bytes for the BBM */ | |
1801 | bytes = (mtd->oobsize - 2) / nsectors; | |
1802 | ||
1803 | /* 4 non-ECC bytes are added before each ECC bytes section */ | |
1804 | bytes -= 4; | |
1805 | ||
1806 | /* and bytes has to be even. */ | |
1807 | if (bytes % 2) | |
1808 | bytes--; | |
1809 | ||
1810 | ecc->strength = bytes * 8 / fls(8 * ecc->size); | |
1811 | ||
1812 | for (i = 0; i < ARRAY_SIZE(strengths); i++) { | |
1813 | if (strengths[i] > ecc->strength) | |
1814 | break; | |
1815 | } | |
1816 | ||
1817 | if (!i) | |
1818 | ecc->strength = 0; | |
1819 | else | |
1820 | ecc->strength = strengths[i - 1]; | |
1821 | } | |
1822 | ||
40297e7f DC |
1823 | if (ecc->size != 512 && ecc->size != 1024) |
1824 | return -EINVAL; | |
1825 | ||
1fef62c1 BB |
1826 | data = kzalloc(sizeof(*data), GFP_KERNEL); |
1827 | if (!data) | |
1828 | return -ENOMEM; | |
1829 | ||
872164e4 BB |
1830 | /* Prefer 1k ECC chunk over 512 ones */ |
1831 | if (ecc->size == 512 && mtd->writesize > 512) { | |
1832 | ecc->size = 1024; | |
1833 | ecc->strength *= 2; | |
1834 | } | |
1835 | ||
1fef62c1 BB |
1836 | /* Add ECC info retrieval from DT */ |
1837 | for (i = 0; i < ARRAY_SIZE(strengths); i++) { | |
1838 | if (ecc->strength <= strengths[i]) | |
1839 | break; | |
1840 | } | |
1841 | ||
1842 | if (i >= ARRAY_SIZE(strengths)) { | |
1843 | dev_err(nfc->dev, "unsupported strength\n"); | |
1844 | ret = -ENOTSUPP; | |
1845 | goto err; | |
1846 | } | |
1847 | ||
1848 | data->mode = i; | |
1849 | ||
1850 | /* HW ECC always request ECC bytes for 1024 bytes blocks */ | |
1851 | ecc->bytes = DIV_ROUND_UP(ecc->strength * fls(8 * 1024), 8); | |
1852 | ||
1853 | /* HW ECC always work with even numbers of ECC bytes */ | |
1854 | ecc->bytes = ALIGN(ecc->bytes, 2); | |
1855 | ||
1fef62c1 BB |
1856 | nsectors = mtd->writesize / ecc->size; |
1857 | ||
1858 | if (mtd->oobsize < ((ecc->bytes + 4) * nsectors)) { | |
1859 | ret = -EINVAL; | |
1860 | goto err; | |
1861 | } | |
1862 | ||
1c1bdd6f BB |
1863 | ecc->read_oob = sunxi_nfc_hw_common_ecc_read_oob; |
1864 | ecc->write_oob = sunxi_nfc_hw_common_ecc_write_oob; | |
c66811e6 | 1865 | mtd_set_ooblayout(mtd, &sunxi_nand_ooblayout_ops); |
1fef62c1 BB |
1866 | ecc->priv = data; |
1867 | ||
1868 | return 0; | |
1869 | ||
1870 | err: | |
1871 | kfree(data); | |
1872 | ||
1873 | return ret; | |
1874 | } | |
1875 | ||
1876 | static void sunxi_nand_hw_common_ecc_ctrl_cleanup(struct nand_ecc_ctrl *ecc) | |
1877 | { | |
1878 | kfree(ecc->priv); | |
1879 | } | |
1880 | ||
1881 | static int sunxi_nand_hw_ecc_ctrl_init(struct mtd_info *mtd, | |
1882 | struct nand_ecc_ctrl *ecc, | |
1883 | struct device_node *np) | |
1884 | { | |
614049a8 BB |
1885 | struct nand_chip *nand = mtd_to_nand(mtd); |
1886 | struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand); | |
1887 | struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller); | |
1fef62c1 BB |
1888 | int ret; |
1889 | ||
1890 | ret = sunxi_nand_hw_common_ecc_ctrl_init(mtd, ecc, np); | |
1891 | if (ret) | |
1892 | return ret; | |
1893 | ||
614049a8 BB |
1894 | if (nfc->dmac) { |
1895 | ecc->read_page = sunxi_nfc_hw_ecc_read_page_dma; | |
1896 | ecc->read_subpage = sunxi_nfc_hw_ecc_read_subpage_dma; | |
1897 | ecc->write_page = sunxi_nfc_hw_ecc_write_page_dma; | |
1898 | nand->options |= NAND_USE_BOUNCE_BUFFER; | |
1899 | } else { | |
1900 | ecc->read_page = sunxi_nfc_hw_ecc_read_page; | |
1901 | ecc->read_subpage = sunxi_nfc_hw_ecc_read_subpage; | |
1902 | ecc->write_page = sunxi_nfc_hw_ecc_write_page; | |
1903 | } | |
1904 | ||
03b1d11a BB |
1905 | /* TODO: support DMA for raw accesses and subpage write */ |
1906 | ecc->write_subpage = sunxi_nfc_hw_ecc_write_subpage; | |
1c1bdd6f BB |
1907 | ecc->read_oob_raw = nand_read_oob_std; |
1908 | ecc->write_oob_raw = nand_write_oob_std; | |
fe82ccef | 1909 | ecc->read_subpage = sunxi_nfc_hw_ecc_read_subpage; |
1fef62c1 BB |
1910 | |
1911 | return 0; | |
1912 | } | |
1913 | ||
1914 | static int sunxi_nand_hw_syndrome_ecc_ctrl_init(struct mtd_info *mtd, | |
1915 | struct nand_ecc_ctrl *ecc, | |
1916 | struct device_node *np) | |
1917 | { | |
1fef62c1 BB |
1918 | int ret; |
1919 | ||
1920 | ret = sunxi_nand_hw_common_ecc_ctrl_init(mtd, ecc, np); | |
1921 | if (ret) | |
1922 | return ret; | |
1923 | ||
1924 | ecc->prepad = 4; | |
1925 | ecc->read_page = sunxi_nfc_hw_syndrome_ecc_read_page; | |
1926 | ecc->write_page = sunxi_nfc_hw_syndrome_ecc_write_page; | |
1c1bdd6f BB |
1927 | ecc->read_oob_raw = nand_read_oob_syndrome; |
1928 | ecc->write_oob_raw = nand_write_oob_syndrome; | |
1fef62c1 | 1929 | |
1fef62c1 BB |
1930 | return 0; |
1931 | } | |
1932 | ||
1933 | static void sunxi_nand_ecc_cleanup(struct nand_ecc_ctrl *ecc) | |
1934 | { | |
1935 | switch (ecc->mode) { | |
1936 | case NAND_ECC_HW: | |
1937 | case NAND_ECC_HW_SYNDROME: | |
1938 | sunxi_nand_hw_common_ecc_ctrl_cleanup(ecc); | |
1939 | break; | |
1940 | case NAND_ECC_NONE: | |
1fef62c1 BB |
1941 | default: |
1942 | break; | |
1943 | } | |
1944 | } | |
1945 | ||
1946 | static int sunxi_nand_ecc_init(struct mtd_info *mtd, struct nand_ecc_ctrl *ecc, | |
1947 | struct device_node *np) | |
1948 | { | |
4bd4ebcc | 1949 | struct nand_chip *nand = mtd_to_nand(mtd); |
1fef62c1 BB |
1950 | int ret; |
1951 | ||
a3d22a55 | 1952 | if (!ecc->size) { |
1fef62c1 BB |
1953 | ecc->size = nand->ecc_step_ds; |
1954 | ecc->strength = nand->ecc_strength_ds; | |
1955 | } | |
1956 | ||
1957 | if (!ecc->size || !ecc->strength) | |
1958 | return -EINVAL; | |
1959 | ||
1fef62c1 | 1960 | switch (ecc->mode) { |
1fef62c1 BB |
1961 | case NAND_ECC_HW: |
1962 | ret = sunxi_nand_hw_ecc_ctrl_init(mtd, ecc, np); | |
1963 | if (ret) | |
1964 | return ret; | |
1965 | break; | |
1966 | case NAND_ECC_HW_SYNDROME: | |
1967 | ret = sunxi_nand_hw_syndrome_ecc_ctrl_init(mtd, ecc, np); | |
1968 | if (ret) | |
1969 | return ret; | |
1970 | break; | |
1971 | case NAND_ECC_NONE: | |
1fef62c1 BB |
1972 | case NAND_ECC_SOFT: |
1973 | break; | |
1974 | default: | |
1975 | return -EINVAL; | |
1976 | } | |
1977 | ||
1978 | return 0; | |
1979 | } | |
1980 | ||
1981 | static int sunxi_nand_chip_init(struct device *dev, struct sunxi_nfc *nfc, | |
1982 | struct device_node *np) | |
1983 | { | |
1fef62c1 | 1984 | struct sunxi_nand_chip *chip; |
1fef62c1 BB |
1985 | struct mtd_info *mtd; |
1986 | struct nand_chip *nand; | |
1987 | int nsels; | |
1988 | int ret; | |
1989 | int i; | |
1990 | u32 tmp; | |
1991 | ||
1992 | if (!of_get_property(np, "reg", &nsels)) | |
1993 | return -EINVAL; | |
1994 | ||
1995 | nsels /= sizeof(u32); | |
1996 | if (!nsels) { | |
1997 | dev_err(dev, "invalid reg property size\n"); | |
1998 | return -EINVAL; | |
1999 | } | |
2000 | ||
2001 | chip = devm_kzalloc(dev, | |
2002 | sizeof(*chip) + | |
2003 | (nsels * sizeof(struct sunxi_nand_chip_sel)), | |
2004 | GFP_KERNEL); | |
2005 | if (!chip) { | |
2006 | dev_err(dev, "could not allocate chip\n"); | |
2007 | return -ENOMEM; | |
2008 | } | |
2009 | ||
2010 | chip->nsels = nsels; | |
2011 | chip->selected = -1; | |
2012 | ||
2013 | for (i = 0; i < nsels; i++) { | |
2014 | ret = of_property_read_u32_index(np, "reg", i, &tmp); | |
2015 | if (ret) { | |
2016 | dev_err(dev, "could not retrieve reg property: %d\n", | |
2017 | ret); | |
2018 | return ret; | |
2019 | } | |
2020 | ||
2021 | if (tmp > NFC_MAX_CS) { | |
2022 | dev_err(dev, | |
2023 | "invalid reg value: %u (max CS = 7)\n", | |
2024 | tmp); | |
2025 | return -EINVAL; | |
2026 | } | |
2027 | ||
2028 | if (test_and_set_bit(tmp, &nfc->assigned_cs)) { | |
2029 | dev_err(dev, "CS %d already assigned\n", tmp); | |
2030 | return -EINVAL; | |
2031 | } | |
2032 | ||
2033 | chip->sels[i].cs = tmp; | |
2034 | ||
2035 | if (!of_property_read_u32_index(np, "allwinner,rb", i, &tmp) && | |
2036 | tmp < 2) { | |
2037 | chip->sels[i].rb.type = RB_NATIVE; | |
2038 | chip->sels[i].rb.info.nativeid = tmp; | |
2039 | } else { | |
2040 | ret = of_get_named_gpio(np, "rb-gpios", i); | |
2041 | if (ret >= 0) { | |
2042 | tmp = ret; | |
2043 | chip->sels[i].rb.type = RB_GPIO; | |
2044 | chip->sels[i].rb.info.gpio = tmp; | |
2045 | ret = devm_gpio_request(dev, tmp, "nand-rb"); | |
2046 | if (ret) | |
2047 | return ret; | |
2048 | ||
2049 | ret = gpio_direction_input(tmp); | |
2050 | if (ret) | |
2051 | return ret; | |
2052 | } else { | |
2053 | chip->sels[i].rb.type = RB_NONE; | |
2054 | } | |
2055 | } | |
2056 | } | |
2057 | ||
1fef62c1 BB |
2058 | nand = &chip->nand; |
2059 | /* Default tR value specified in the ONFI spec (chapter 4.15.1) */ | |
2060 | nand->chip_delay = 200; | |
2061 | nand->controller = &nfc->controller; | |
a3d22a55 BB |
2062 | /* |
2063 | * Set the ECC mode to the default value in case nothing is specified | |
2064 | * in the DT. | |
2065 | */ | |
2066 | nand->ecc.mode = NAND_ECC_HW; | |
63752199 | 2067 | nand_set_flash_node(nand, np); |
1fef62c1 BB |
2068 | nand->select_chip = sunxi_nfc_select_chip; |
2069 | nand->cmd_ctrl = sunxi_nfc_cmd_ctrl; | |
2070 | nand->read_buf = sunxi_nfc_read_buf; | |
2071 | nand->write_buf = sunxi_nfc_write_buf; | |
2072 | nand->read_byte = sunxi_nfc_read_byte; | |
907f45fb | 2073 | nand->setup_data_interface = sunxi_nfc_setup_data_interface; |
1fef62c1 | 2074 | |
32e9f2d8 | 2075 | mtd = nand_to_mtd(nand); |
1fef62c1 | 2076 | mtd->dev.parent = dev; |
1fef62c1 BB |
2077 | |
2078 | ret = nand_scan_ident(mtd, nsels, NULL); | |
2079 | if (ret) | |
2080 | return ret; | |
2081 | ||
a3d22a55 BB |
2082 | if (nand->bbt_options & NAND_BBT_USE_FLASH) |
2083 | nand->bbt_options |= NAND_BBT_NO_OOB; | |
2084 | ||
4be4e03e BB |
2085 | if (nand->options & NAND_NEED_SCRAMBLING) |
2086 | nand->options |= NAND_NO_SUBPAGE_WRITE; | |
2087 | ||
fe82ccef BB |
2088 | nand->options |= NAND_SUBPAGE_READ; |
2089 | ||
1fef62c1 BB |
2090 | ret = sunxi_nand_ecc_init(mtd, &nand->ecc, np); |
2091 | if (ret) { | |
2092 | dev_err(dev, "ECC init failed: %d\n", ret); | |
2093 | return ret; | |
2094 | } | |
2095 | ||
2096 | ret = nand_scan_tail(mtd); | |
2097 | if (ret) { | |
2098 | dev_err(dev, "nand_scan_tail failed: %d\n", ret); | |
2099 | return ret; | |
2100 | } | |
2101 | ||
a61ae81a | 2102 | ret = mtd_device_register(mtd, NULL, 0); |
1fef62c1 BB |
2103 | if (ret) { |
2104 | dev_err(dev, "failed to register mtd device: %d\n", ret); | |
2105 | nand_release(mtd); | |
2106 | return ret; | |
2107 | } | |
2108 | ||
2109 | list_add_tail(&chip->node, &nfc->chips); | |
2110 | ||
2111 | return 0; | |
2112 | } | |
2113 | ||
2114 | static int sunxi_nand_chips_init(struct device *dev, struct sunxi_nfc *nfc) | |
2115 | { | |
2116 | struct device_node *np = dev->of_node; | |
2117 | struct device_node *nand_np; | |
2118 | int nchips = of_get_child_count(np); | |
2119 | int ret; | |
2120 | ||
2121 | if (nchips > 8) { | |
2122 | dev_err(dev, "too many NAND chips: %d (max = 8)\n", nchips); | |
2123 | return -EINVAL; | |
2124 | } | |
2125 | ||
2126 | for_each_child_of_node(np, nand_np) { | |
2127 | ret = sunxi_nand_chip_init(dev, nfc, nand_np); | |
a81c0f07 JL |
2128 | if (ret) { |
2129 | of_node_put(nand_np); | |
1fef62c1 | 2130 | return ret; |
a81c0f07 | 2131 | } |
1fef62c1 BB |
2132 | } |
2133 | ||
2134 | return 0; | |
2135 | } | |
2136 | ||
2137 | static void sunxi_nand_chips_cleanup(struct sunxi_nfc *nfc) | |
2138 | { | |
2139 | struct sunxi_nand_chip *chip; | |
2140 | ||
2141 | while (!list_empty(&nfc->chips)) { | |
2142 | chip = list_first_entry(&nfc->chips, struct sunxi_nand_chip, | |
2143 | node); | |
32e9f2d8 | 2144 | nand_release(nand_to_mtd(&chip->nand)); |
1fef62c1 | 2145 | sunxi_nand_ecc_cleanup(&chip->nand.ecc); |
8e375ccd | 2146 | list_del(&chip->node); |
1fef62c1 BB |
2147 | } |
2148 | } | |
2149 | ||
2150 | static int sunxi_nfc_probe(struct platform_device *pdev) | |
2151 | { | |
2152 | struct device *dev = &pdev->dev; | |
2153 | struct resource *r; | |
2154 | struct sunxi_nfc *nfc; | |
2155 | int irq; | |
2156 | int ret; | |
2157 | ||
2158 | nfc = devm_kzalloc(dev, sizeof(*nfc), GFP_KERNEL); | |
2159 | if (!nfc) | |
2160 | return -ENOMEM; | |
2161 | ||
2162 | nfc->dev = dev; | |
d45bc58d | 2163 | nand_hw_control_init(&nfc->controller); |
1fef62c1 BB |
2164 | INIT_LIST_HEAD(&nfc->chips); |
2165 | ||
2166 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2167 | nfc->regs = devm_ioremap_resource(dev, r); | |
2168 | if (IS_ERR(nfc->regs)) | |
2169 | return PTR_ERR(nfc->regs); | |
2170 | ||
2171 | irq = platform_get_irq(pdev, 0); | |
2172 | if (irq < 0) { | |
2173 | dev_err(dev, "failed to retrieve irq\n"); | |
2174 | return irq; | |
2175 | } | |
2176 | ||
2177 | nfc->ahb_clk = devm_clk_get(dev, "ahb"); | |
2178 | if (IS_ERR(nfc->ahb_clk)) { | |
2179 | dev_err(dev, "failed to retrieve ahb clk\n"); | |
2180 | return PTR_ERR(nfc->ahb_clk); | |
2181 | } | |
2182 | ||
2183 | ret = clk_prepare_enable(nfc->ahb_clk); | |
2184 | if (ret) | |
2185 | return ret; | |
2186 | ||
2187 | nfc->mod_clk = devm_clk_get(dev, "mod"); | |
2188 | if (IS_ERR(nfc->mod_clk)) { | |
2189 | dev_err(dev, "failed to retrieve mod clk\n"); | |
2190 | ret = PTR_ERR(nfc->mod_clk); | |
2191 | goto out_ahb_clk_unprepare; | |
2192 | } | |
2193 | ||
2194 | ret = clk_prepare_enable(nfc->mod_clk); | |
2195 | if (ret) | |
2196 | goto out_ahb_clk_unprepare; | |
2197 | ||
ab9d6a78 IZ |
2198 | nfc->reset = devm_reset_control_get_optional(dev, "ahb"); |
2199 | if (!IS_ERR(nfc->reset)) { | |
2200 | ret = reset_control_deassert(nfc->reset); | |
2201 | if (ret) { | |
2202 | dev_err(dev, "reset err %d\n", ret); | |
2203 | goto out_mod_clk_unprepare; | |
2204 | } | |
2205 | } else if (PTR_ERR(nfc->reset) != -ENOENT) { | |
2206 | ret = PTR_ERR(nfc->reset); | |
2207 | goto out_mod_clk_unprepare; | |
2208 | } | |
2209 | ||
1fef62c1 BB |
2210 | ret = sunxi_nfc_rst(nfc); |
2211 | if (ret) | |
ab9d6a78 | 2212 | goto out_ahb_reset_reassert; |
1fef62c1 BB |
2213 | |
2214 | writel(0, nfc->regs + NFC_REG_INT); | |
2215 | ret = devm_request_irq(dev, irq, sunxi_nfc_interrupt, | |
2216 | 0, "sunxi-nand", nfc); | |
2217 | if (ret) | |
ab9d6a78 | 2218 | goto out_ahb_reset_reassert; |
1fef62c1 | 2219 | |
614049a8 BB |
2220 | nfc->dmac = dma_request_slave_channel(dev, "rxtx"); |
2221 | if (nfc->dmac) { | |
2222 | struct dma_slave_config dmac_cfg = { }; | |
2223 | ||
2224 | dmac_cfg.src_addr = r->start + NFC_REG_IO_DATA; | |
2225 | dmac_cfg.dst_addr = dmac_cfg.src_addr; | |
2226 | dmac_cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
2227 | dmac_cfg.dst_addr_width = dmac_cfg.src_addr_width; | |
2228 | dmac_cfg.src_maxburst = 4; | |
2229 | dmac_cfg.dst_maxburst = 4; | |
2230 | dmaengine_slave_config(nfc->dmac, &dmac_cfg); | |
2231 | } else { | |
2232 | dev_warn(dev, "failed to request rxtx DMA channel\n"); | |
2233 | } | |
2234 | ||
1fef62c1 BB |
2235 | platform_set_drvdata(pdev, nfc); |
2236 | ||
1fef62c1 BB |
2237 | ret = sunxi_nand_chips_init(dev, nfc); |
2238 | if (ret) { | |
2239 | dev_err(dev, "failed to init nand chips\n"); | |
614049a8 | 2240 | goto out_release_dmac; |
1fef62c1 BB |
2241 | } |
2242 | ||
2243 | return 0; | |
2244 | ||
614049a8 BB |
2245 | out_release_dmac: |
2246 | if (nfc->dmac) | |
2247 | dma_release_channel(nfc->dmac); | |
ab9d6a78 IZ |
2248 | out_ahb_reset_reassert: |
2249 | if (!IS_ERR(nfc->reset)) | |
2250 | reset_control_assert(nfc->reset); | |
1fef62c1 BB |
2251 | out_mod_clk_unprepare: |
2252 | clk_disable_unprepare(nfc->mod_clk); | |
2253 | out_ahb_clk_unprepare: | |
2254 | clk_disable_unprepare(nfc->ahb_clk); | |
2255 | ||
2256 | return ret; | |
2257 | } | |
2258 | ||
2259 | static int sunxi_nfc_remove(struct platform_device *pdev) | |
2260 | { | |
2261 | struct sunxi_nfc *nfc = platform_get_drvdata(pdev); | |
2262 | ||
2263 | sunxi_nand_chips_cleanup(nfc); | |
ab9d6a78 IZ |
2264 | |
2265 | if (!IS_ERR(nfc->reset)) | |
2266 | reset_control_assert(nfc->reset); | |
2267 | ||
614049a8 BB |
2268 | if (nfc->dmac) |
2269 | dma_release_channel(nfc->dmac); | |
dd26a458 BB |
2270 | clk_disable_unprepare(nfc->mod_clk); |
2271 | clk_disable_unprepare(nfc->ahb_clk); | |
1fef62c1 BB |
2272 | |
2273 | return 0; | |
2274 | } | |
2275 | ||
2276 | static const struct of_device_id sunxi_nfc_ids[] = { | |
2277 | { .compatible = "allwinner,sun4i-a10-nand" }, | |
2278 | { /* sentinel */ } | |
2279 | }; | |
2280 | MODULE_DEVICE_TABLE(of, sunxi_nfc_ids); | |
2281 | ||
2282 | static struct platform_driver sunxi_nfc_driver = { | |
2283 | .driver = { | |
2284 | .name = "sunxi_nand", | |
2285 | .of_match_table = sunxi_nfc_ids, | |
2286 | }, | |
2287 | .probe = sunxi_nfc_probe, | |
2288 | .remove = sunxi_nfc_remove, | |
2289 | }; | |
2290 | module_platform_driver(sunxi_nfc_driver); | |
2291 | ||
2292 | MODULE_LICENSE("GPL v2"); | |
2293 | MODULE_AUTHOR("Boris BREZILLON"); | |
2294 | MODULE_DESCRIPTION("Allwinner NAND Flash Controller driver"); | |
2295 | MODULE_ALIAS("platform:sunxi_nand"); |