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1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Marvell NAND flash controller driver | |
4 | * | |
5 | * Copyright (C) 2017 Marvell | |
6 | * Author: Miquel RAYNAL <miquel.raynal@free-electrons.com> | |
7 | * | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/clk.h> | |
12 | #include <linux/mtd/rawnand.h> | |
13 | #include <linux/of_platform.h> | |
14 | #include <linux/iopoll.h> | |
15 | #include <linux/interrupt.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/mfd/syscon.h> | |
18 | #include <linux/regmap.h> | |
19 | #include <asm/unaligned.h> | |
20 | ||
21 | #include <linux/dmaengine.h> | |
22 | #include <linux/dma-mapping.h> | |
23 | #include <linux/dma/pxa-dma.h> | |
24 | #include <linux/platform_data/mtd-nand-pxa3xx.h> | |
25 | ||
26 | /* Data FIFO granularity, FIFO reads/writes must be a multiple of this length */ | |
27 | #define FIFO_DEPTH 8 | |
28 | #define FIFO_REP(x) (x / sizeof(u32)) | |
29 | #define BCH_SEQ_READS (32 / FIFO_DEPTH) | |
30 | /* NFC does not support transfers of larger chunks at a time */ | |
31 | #define MAX_CHUNK_SIZE 2112 | |
32 | /* NFCv1 cannot read more that 7 bytes of ID */ | |
33 | #define NFCV1_READID_LEN 7 | |
34 | /* Polling is done at a pace of POLL_PERIOD us until POLL_TIMEOUT is reached */ | |
35 | #define POLL_PERIOD 0 | |
36 | #define POLL_TIMEOUT 100000 | |
37 | /* Interrupt maximum wait period in ms */ | |
38 | #define IRQ_TIMEOUT 1000 | |
39 | /* Latency in clock cycles between SoC pins and NFC logic */ | |
40 | #define MIN_RD_DEL_CNT 3 | |
41 | /* Maximum number of contiguous address cycles */ | |
42 | #define MAX_ADDRESS_CYC_NFCV1 5 | |
43 | #define MAX_ADDRESS_CYC_NFCV2 7 | |
44 | /* System control registers/bits to enable the NAND controller on some SoCs */ | |
45 | #define GENCONF_SOC_DEVICE_MUX 0x208 | |
46 | #define GENCONF_SOC_DEVICE_MUX_NFC_EN BIT(0) | |
47 | #define GENCONF_SOC_DEVICE_MUX_ECC_CLK_RST BIT(20) | |
48 | #define GENCONF_SOC_DEVICE_MUX_ECC_CORE_RST BIT(21) | |
49 | #define GENCONF_SOC_DEVICE_MUX_NFC_INT_EN BIT(25) | |
50 | #define GENCONF_CLK_GATING_CTRL 0x220 | |
51 | #define GENCONF_CLK_GATING_CTRL_ND_GATE BIT(2) | |
52 | #define GENCONF_ND_CLK_CTRL 0x700 | |
53 | #define GENCONF_ND_CLK_CTRL_EN BIT(0) | |
54 | ||
55 | /* NAND controller data flash control register */ | |
56 | #define NDCR 0x00 | |
57 | #define NDCR_ALL_INT GENMASK(11, 0) | |
58 | #define NDCR_CS1_CMDDM BIT(7) | |
59 | #define NDCR_CS0_CMDDM BIT(8) | |
60 | #define NDCR_RDYM BIT(11) | |
61 | #define NDCR_ND_ARB_EN BIT(12) | |
62 | #define NDCR_RA_START BIT(15) | |
63 | #define NDCR_RD_ID_CNT(x) (min_t(unsigned int, x, 0x7) << 16) | |
64 | #define NDCR_PAGE_SZ(x) (x >= 2048 ? BIT(24) : 0) | |
65 | #define NDCR_DWIDTH_M BIT(26) | |
66 | #define NDCR_DWIDTH_C BIT(27) | |
67 | #define NDCR_ND_RUN BIT(28) | |
68 | #define NDCR_DMA_EN BIT(29) | |
69 | #define NDCR_ECC_EN BIT(30) | |
70 | #define NDCR_SPARE_EN BIT(31) | |
71 | #define NDCR_GENERIC_FIELDS_MASK (~(NDCR_RA_START | NDCR_PAGE_SZ(2048) | \ | |
72 | NDCR_DWIDTH_M | NDCR_DWIDTH_C)) | |
73 | ||
74 | /* NAND interface timing parameter 0 register */ | |
75 | #define NDTR0 0x04 | |
76 | #define NDTR0_TRP(x) ((min_t(unsigned int, x, 0xF) & 0x7) << 0) | |
77 | #define NDTR0_TRH(x) (min_t(unsigned int, x, 0x7) << 3) | |
78 | #define NDTR0_ETRP(x) ((min_t(unsigned int, x, 0xF) & 0x8) << 3) | |
79 | #define NDTR0_SEL_NRE_EDGE BIT(7) | |
80 | #define NDTR0_TWP(x) (min_t(unsigned int, x, 0x7) << 8) | |
81 | #define NDTR0_TWH(x) (min_t(unsigned int, x, 0x7) << 11) | |
82 | #define NDTR0_TCS(x) (min_t(unsigned int, x, 0x7) << 16) | |
83 | #define NDTR0_TCH(x) (min_t(unsigned int, x, 0x7) << 19) | |
84 | #define NDTR0_RD_CNT_DEL(x) (min_t(unsigned int, x, 0xF) << 22) | |
85 | #define NDTR0_SELCNTR BIT(26) | |
86 | #define NDTR0_TADL(x) (min_t(unsigned int, x, 0x1F) << 27) | |
87 | ||
88 | /* NAND interface timing parameter 1 register */ | |
89 | #define NDTR1 0x0C | |
90 | #define NDTR1_TAR(x) (min_t(unsigned int, x, 0xF) << 0) | |
91 | #define NDTR1_TWHR(x) (min_t(unsigned int, x, 0xF) << 4) | |
92 | #define NDTR1_TRHW(x) (min_t(unsigned int, x / 16, 0x3) << 8) | |
93 | #define NDTR1_PRESCALE BIT(14) | |
94 | #define NDTR1_WAIT_MODE BIT(15) | |
95 | #define NDTR1_TR(x) (min_t(unsigned int, x, 0xFFFF) << 16) | |
96 | ||
97 | /* NAND controller status register */ | |
98 | #define NDSR 0x14 | |
99 | #define NDSR_WRCMDREQ BIT(0) | |
100 | #define NDSR_RDDREQ BIT(1) | |
101 | #define NDSR_WRDREQ BIT(2) | |
102 | #define NDSR_CORERR BIT(3) | |
103 | #define NDSR_UNCERR BIT(4) | |
104 | #define NDSR_CMDD(cs) BIT(8 - cs) | |
105 | #define NDSR_RDY(rb) BIT(11 + rb) | |
106 | #define NDSR_ERRCNT(x) ((x >> 16) & 0x1F) | |
107 | ||
108 | /* NAND ECC control register */ | |
109 | #define NDECCCTRL 0x28 | |
110 | #define NDECCCTRL_BCH_EN BIT(0) | |
111 | ||
112 | /* NAND controller data buffer register */ | |
113 | #define NDDB 0x40 | |
114 | ||
115 | /* NAND controller command buffer 0 register */ | |
116 | #define NDCB0 0x48 | |
117 | #define NDCB0_CMD1(x) ((x & 0xFF) << 0) | |
118 | #define NDCB0_CMD2(x) ((x & 0xFF) << 8) | |
119 | #define NDCB0_ADDR_CYC(x) ((x & 0x7) << 16) | |
120 | #define NDCB0_ADDR_GET_NUM_CYC(x) (((x) >> 16) & 0x7) | |
121 | #define NDCB0_DBC BIT(19) | |
122 | #define NDCB0_CMD_TYPE(x) ((x & 0x7) << 21) | |
123 | #define NDCB0_CSEL BIT(24) | |
124 | #define NDCB0_RDY_BYP BIT(27) | |
125 | #define NDCB0_LEN_OVRD BIT(28) | |
126 | #define NDCB0_CMD_XTYPE(x) ((x & 0x7) << 29) | |
127 | ||
128 | /* NAND controller command buffer 1 register */ | |
129 | #define NDCB1 0x4C | |
130 | #define NDCB1_COLS(x) ((x & 0xFFFF) << 0) | |
131 | #define NDCB1_ADDRS_PAGE(x) (x << 16) | |
132 | ||
133 | /* NAND controller command buffer 2 register */ | |
134 | #define NDCB2 0x50 | |
135 | #define NDCB2_ADDR5_PAGE(x) (((x >> 16) & 0xFF) << 0) | |
136 | #define NDCB2_ADDR5_CYC(x) ((x & 0xFF) << 0) | |
137 | ||
138 | /* NAND controller command buffer 3 register */ | |
139 | #define NDCB3 0x54 | |
140 | #define NDCB3_ADDR6_CYC(x) ((x & 0xFF) << 16) | |
141 | #define NDCB3_ADDR7_CYC(x) ((x & 0xFF) << 24) | |
142 | ||
143 | /* NAND controller command buffer 0 register 'type' and 'xtype' fields */ | |
144 | #define TYPE_READ 0 | |
145 | #define TYPE_WRITE 1 | |
146 | #define TYPE_ERASE 2 | |
147 | #define TYPE_READ_ID 3 | |
148 | #define TYPE_STATUS 4 | |
149 | #define TYPE_RESET 5 | |
150 | #define TYPE_NAKED_CMD 6 | |
151 | #define TYPE_NAKED_ADDR 7 | |
152 | #define TYPE_MASK 7 | |
153 | #define XTYPE_MONOLITHIC_RW 0 | |
154 | #define XTYPE_LAST_NAKED_RW 1 | |
155 | #define XTYPE_FINAL_COMMAND 3 | |
156 | #define XTYPE_READ 4 | |
157 | #define XTYPE_WRITE_DISPATCH 4 | |
158 | #define XTYPE_NAKED_RW 5 | |
159 | #define XTYPE_COMMAND_DISPATCH 6 | |
160 | #define XTYPE_MASK 7 | |
161 | ||
162 | /** | |
163 | * Marvell ECC engine works differently than the others, in order to limit the | |
164 | * size of the IP, hardware engineers chose to set a fixed strength at 16 bits | |
165 | * per subpage, and depending on a the desired strength needed by the NAND chip, | |
166 | * a particular layout mixing data/spare/ecc is defined, with a possible last | |
167 | * chunk smaller that the others. | |
168 | * | |
169 | * @writesize: Full page size on which the layout applies | |
170 | * @chunk: Desired ECC chunk size on which the layout applies | |
171 | * @strength: Desired ECC strength (per chunk size bytes) on which the | |
172 | * layout applies | |
173 | * @nchunks: Total number of chunks | |
174 | * @full_chunk_cnt: Number of full-sized chunks, which is the number of | |
175 | * repetitions of the pattern: | |
176 | * (data_bytes + spare_bytes + ecc_bytes). | |
177 | * @data_bytes: Number of data bytes per chunk | |
178 | * @spare_bytes: Number of spare bytes per chunk | |
179 | * @ecc_bytes: Number of ecc bytes per chunk | |
180 | * @last_data_bytes: Number of data bytes in the last chunk | |
181 | * @last_spare_bytes: Number of spare bytes in the last chunk | |
182 | * @last_ecc_bytes: Number of ecc bytes in the last chunk | |
183 | */ | |
184 | struct marvell_hw_ecc_layout { | |
185 | /* Constraints */ | |
186 | int writesize; | |
187 | int chunk; | |
188 | int strength; | |
189 | /* Corresponding layout */ | |
190 | int nchunks; | |
191 | int full_chunk_cnt; | |
192 | int data_bytes; | |
193 | int spare_bytes; | |
194 | int ecc_bytes; | |
195 | int last_data_bytes; | |
196 | int last_spare_bytes; | |
197 | int last_ecc_bytes; | |
198 | }; | |
199 | ||
200 | #define MARVELL_LAYOUT(ws, dc, ds, nc, fcc, db, sb, eb, ldb, lsb, leb) \ | |
201 | { \ | |
202 | .writesize = ws, \ | |
203 | .chunk = dc, \ | |
204 | .strength = ds, \ | |
205 | .nchunks = nc, \ | |
206 | .full_chunk_cnt = fcc, \ | |
207 | .data_bytes = db, \ | |
208 | .spare_bytes = sb, \ | |
209 | .ecc_bytes = eb, \ | |
210 | .last_data_bytes = ldb, \ | |
211 | .last_spare_bytes = lsb, \ | |
212 | .last_ecc_bytes = leb, \ | |
213 | } | |
214 | ||
215 | /* Layouts explained in AN-379_Marvell_SoC_NFC_ECC */ | |
216 | static const struct marvell_hw_ecc_layout marvell_nfc_layouts[] = { | |
217 | MARVELL_LAYOUT( 512, 512, 1, 1, 1, 512, 8, 8, 0, 0, 0), | |
218 | MARVELL_LAYOUT( 2048, 512, 1, 1, 1, 2048, 40, 24, 0, 0, 0), | |
219 | MARVELL_LAYOUT( 2048, 512, 4, 1, 1, 2048, 32, 30, 0, 0, 0), | |
220 | MARVELL_LAYOUT( 4096, 512, 4, 2, 2, 2048, 32, 30, 0, 0, 0), | |
221 | MARVELL_LAYOUT( 4096, 512, 8, 5, 4, 1024, 0, 30, 0, 64, 30), | |
222 | }; | |
223 | ||
224 | /** | |
225 | * The Nand Flash Controller has up to 4 CE and 2 RB pins. The CE selection | |
226 | * is made by a field in NDCB0 register, and in another field in NDCB2 register. | |
227 | * The datasheet describes the logic with an error: ADDR5 field is once | |
228 | * declared at the beginning of NDCB2, and another time at its end. Because the | |
229 | * ADDR5 field of NDCB2 may be used by other bytes, it would be more logical | |
230 | * to use the last bit of this field instead of the first ones. | |
231 | * | |
232 | * @cs: Wanted CE lane. | |
233 | * @ndcb0_csel: Value of the NDCB0 register with or without the flag | |
234 | * selecting the wanted CE lane. This is set once when | |
235 | * the Device Tree is probed. | |
236 | * @rb: Ready/Busy pin for the flash chip | |
237 | */ | |
238 | struct marvell_nand_chip_sel { | |
239 | unsigned int cs; | |
240 | u32 ndcb0_csel; | |
241 | unsigned int rb; | |
242 | }; | |
243 | ||
244 | /** | |
245 | * NAND chip structure: stores NAND chip device related information | |
246 | * | |
247 | * @chip: Base NAND chip structure | |
248 | * @node: Used to store NAND chips into a list | |
249 | * @layout NAND layout when using hardware ECC | |
250 | * @ndcr: Controller register value for this NAND chip | |
251 | * @ndtr0: Timing registers 0 value for this NAND chip | |
252 | * @ndtr1: Timing registers 1 value for this NAND chip | |
253 | * @selected_die: Current active CS | |
254 | * @nsels: Number of CS lines required by the NAND chip | |
255 | * @sels: Array of CS lines descriptions | |
256 | */ | |
257 | struct marvell_nand_chip { | |
258 | struct nand_chip chip; | |
259 | struct list_head node; | |
260 | const struct marvell_hw_ecc_layout *layout; | |
261 | u32 ndcr; | |
262 | u32 ndtr0; | |
263 | u32 ndtr1; | |
264 | int addr_cyc; | |
265 | int selected_die; | |
266 | unsigned int nsels; | |
267 | struct marvell_nand_chip_sel sels[0]; | |
268 | }; | |
269 | ||
270 | static inline struct marvell_nand_chip *to_marvell_nand(struct nand_chip *chip) | |
271 | { | |
272 | return container_of(chip, struct marvell_nand_chip, chip); | |
273 | } | |
274 | ||
275 | static inline struct marvell_nand_chip_sel *to_nand_sel(struct marvell_nand_chip | |
276 | *nand) | |
277 | { | |
278 | return &nand->sels[nand->selected_die]; | |
279 | } | |
280 | ||
281 | /** | |
282 | * NAND controller capabilities for distinction between compatible strings | |
283 | * | |
284 | * @max_cs_nb: Number of Chip Select lines available | |
285 | * @max_rb_nb: Number of Ready/Busy lines available | |
286 | * @need_system_controller: Indicates if the SoC needs to have access to the | |
287 | * system controller (ie. to enable the NAND controller) | |
288 | * @legacy_of_bindings: Indicates if DT parsing must be done using the old | |
289 | * fashion way | |
290 | * @is_nfcv2: NFCv2 has numerous enhancements compared to NFCv1, ie. | |
291 | * BCH error detection and correction algorithm, | |
292 | * NDCB3 register has been added | |
293 | * @use_dma: Use dma for data transfers | |
294 | */ | |
295 | struct marvell_nfc_caps { | |
296 | unsigned int max_cs_nb; | |
297 | unsigned int max_rb_nb; | |
298 | bool need_system_controller; | |
299 | bool legacy_of_bindings; | |
300 | bool is_nfcv2; | |
301 | bool use_dma; | |
302 | }; | |
303 | ||
304 | /** | |
305 | * NAND controller structure: stores Marvell NAND controller information | |
306 | * | |
307 | * @controller: Base controller structure | |
308 | * @dev: Parent device (used to print error messages) | |
309 | * @regs: NAND controller registers | |
6b6de654 | 310 | * @core_clk: Core clock |
961ba15c | 311 | * @reg_clk: Regiters clock |
02f26ecf MR |
312 | * @complete: Completion object to wait for NAND controller events |
313 | * @assigned_cs: Bitmask describing already assigned CS lines | |
314 | * @chips: List containing all the NAND chips attached to | |
315 | * this NAND controller | |
316 | * @caps: NAND controller capabilities for each compatible string | |
317 | * @dma_chan: DMA channel (NFCv1 only) | |
318 | * @dma_buf: 32-bit aligned buffer for DMA transfers (NFCv1 only) | |
319 | */ | |
320 | struct marvell_nfc { | |
7da45139 | 321 | struct nand_controller controller; |
02f26ecf MR |
322 | struct device *dev; |
323 | void __iomem *regs; | |
6b6de654 | 324 | struct clk *core_clk; |
961ba15c | 325 | struct clk *reg_clk; |
02f26ecf MR |
326 | struct completion complete; |
327 | unsigned long assigned_cs; | |
328 | struct list_head chips; | |
329 | struct nand_chip *selected_chip; | |
330 | const struct marvell_nfc_caps *caps; | |
331 | ||
332 | /* DMA (NFCv1 only) */ | |
333 | bool use_dma; | |
334 | struct dma_chan *dma_chan; | |
335 | u8 *dma_buf; | |
336 | }; | |
337 | ||
7da45139 | 338 | static inline struct marvell_nfc *to_marvell_nfc(struct nand_controller *ctrl) |
02f26ecf MR |
339 | { |
340 | return container_of(ctrl, struct marvell_nfc, controller); | |
341 | } | |
342 | ||
343 | /** | |
344 | * NAND controller timings expressed in NAND Controller clock cycles | |
345 | * | |
346 | * @tRP: ND_nRE pulse width | |
347 | * @tRH: ND_nRE high duration | |
348 | * @tWP: ND_nWE pulse time | |
349 | * @tWH: ND_nWE high duration | |
350 | * @tCS: Enable signal setup time | |
351 | * @tCH: Enable signal hold time | |
352 | * @tADL: Address to write data delay | |
353 | * @tAR: ND_ALE low to ND_nRE low delay | |
354 | * @tWHR: ND_nWE high to ND_nRE low for status read | |
355 | * @tRHW: ND_nRE high duration, read to write delay | |
356 | * @tR: ND_nWE high to ND_nRE low for read | |
357 | */ | |
358 | struct marvell_nfc_timings { | |
359 | /* NDTR0 fields */ | |
360 | unsigned int tRP; | |
361 | unsigned int tRH; | |
362 | unsigned int tWP; | |
363 | unsigned int tWH; | |
364 | unsigned int tCS; | |
365 | unsigned int tCH; | |
366 | unsigned int tADL; | |
367 | /* NDTR1 fields */ | |
368 | unsigned int tAR; | |
369 | unsigned int tWHR; | |
370 | unsigned int tRHW; | |
371 | unsigned int tR; | |
372 | }; | |
373 | ||
374 | /** | |
375 | * Derives a duration in numbers of clock cycles. | |
376 | * | |
377 | * @ps: Duration in pico-seconds | |
378 | * @period_ns: Clock period in nano-seconds | |
379 | * | |
380 | * Convert the duration in nano-seconds, then divide by the period and | |
381 | * return the number of clock periods. | |
382 | */ | |
383 | #define TO_CYCLES(ps, period_ns) (DIV_ROUND_UP(ps / 1000, period_ns)) | |
07ad5a72 MR |
384 | #define TO_CYCLES64(ps, period_ns) (DIV_ROUND_UP_ULL(div_u64(ps, 1000), \ |
385 | period_ns)) | |
02f26ecf MR |
386 | |
387 | /** | |
388 | * NAND driver structure filled during the parsing of the ->exec_op() subop | |
389 | * subset of instructions. | |
390 | * | |
391 | * @ndcb: Array of values written to NDCBx registers | |
392 | * @cle_ale_delay_ns: Optional delay after the last CMD or ADDR cycle | |
393 | * @rdy_timeout_ms: Timeout for waits on Ready/Busy pin | |
394 | * @rdy_delay_ns: Optional delay after waiting for the RB pin | |
395 | * @data_delay_ns: Optional delay after the data xfer | |
396 | * @data_instr_idx: Index of the data instruction in the subop | |
397 | * @data_instr: Pointer to the data instruction in the subop | |
398 | */ | |
399 | struct marvell_nfc_op { | |
400 | u32 ndcb[4]; | |
401 | unsigned int cle_ale_delay_ns; | |
402 | unsigned int rdy_timeout_ms; | |
403 | unsigned int rdy_delay_ns; | |
404 | unsigned int data_delay_ns; | |
405 | unsigned int data_instr_idx; | |
406 | const struct nand_op_instr *data_instr; | |
407 | }; | |
408 | ||
409 | /* | |
410 | * Internal helper to conditionnally apply a delay (from the above structure, | |
411 | * most of the time). | |
412 | */ | |
413 | static void cond_delay(unsigned int ns) | |
414 | { | |
415 | if (!ns) | |
416 | return; | |
417 | ||
418 | if (ns < 10000) | |
419 | ndelay(ns); | |
420 | else | |
421 | udelay(DIV_ROUND_UP(ns, 1000)); | |
422 | } | |
423 | ||
424 | /* | |
425 | * The controller has many flags that could generate interrupts, most of them | |
426 | * are disabled and polling is used. For the very slow signals, using interrupts | |
427 | * may relax the CPU charge. | |
428 | */ | |
429 | static void marvell_nfc_disable_int(struct marvell_nfc *nfc, u32 int_mask) | |
430 | { | |
431 | u32 reg; | |
432 | ||
433 | /* Writing 1 disables the interrupt */ | |
434 | reg = readl_relaxed(nfc->regs + NDCR); | |
435 | writel_relaxed(reg | int_mask, nfc->regs + NDCR); | |
436 | } | |
437 | ||
438 | static void marvell_nfc_enable_int(struct marvell_nfc *nfc, u32 int_mask) | |
439 | { | |
440 | u32 reg; | |
441 | ||
442 | /* Writing 0 enables the interrupt */ | |
443 | reg = readl_relaxed(nfc->regs + NDCR); | |
444 | writel_relaxed(reg & ~int_mask, nfc->regs + NDCR); | |
445 | } | |
446 | ||
447 | static void marvell_nfc_clear_int(struct marvell_nfc *nfc, u32 int_mask) | |
448 | { | |
449 | writel_relaxed(int_mask, nfc->regs + NDSR); | |
450 | } | |
451 | ||
452 | static void marvell_nfc_force_byte_access(struct nand_chip *chip, | |
453 | bool force_8bit) | |
454 | { | |
455 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
456 | u32 ndcr; | |
457 | ||
458 | /* | |
459 | * Callers of this function do not verify if the NAND is using a 16-bit | |
460 | * an 8-bit bus for normal operations, so we need to take care of that | |
461 | * here by leaving the configuration unchanged if the NAND does not have | |
462 | * the NAND_BUSWIDTH_16 flag set. | |
463 | */ | |
464 | if (!(chip->options & NAND_BUSWIDTH_16)) | |
465 | return; | |
466 | ||
467 | ndcr = readl_relaxed(nfc->regs + NDCR); | |
468 | ||
469 | if (force_8bit) | |
470 | ndcr &= ~(NDCR_DWIDTH_M | NDCR_DWIDTH_C); | |
471 | else | |
472 | ndcr |= NDCR_DWIDTH_M | NDCR_DWIDTH_C; | |
473 | ||
474 | writel_relaxed(ndcr, nfc->regs + NDCR); | |
475 | } | |
476 | ||
477 | static int marvell_nfc_wait_ndrun(struct nand_chip *chip) | |
478 | { | |
479 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
480 | u32 val; | |
481 | int ret; | |
482 | ||
483 | /* | |
484 | * The command is being processed, wait for the ND_RUN bit to be | |
485 | * cleared by the NFC. If not, we must clear it by hand. | |
486 | */ | |
487 | ret = readl_relaxed_poll_timeout(nfc->regs + NDCR, val, | |
488 | (val & NDCR_ND_RUN) == 0, | |
489 | POLL_PERIOD, POLL_TIMEOUT); | |
490 | if (ret) { | |
491 | dev_err(nfc->dev, "Timeout on NAND controller run mode\n"); | |
492 | writel_relaxed(readl(nfc->regs + NDCR) & ~NDCR_ND_RUN, | |
493 | nfc->regs + NDCR); | |
494 | return ret; | |
495 | } | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
500 | /* | |
501 | * Any time a command has to be sent to the controller, the following sequence | |
502 | * has to be followed: | |
503 | * - call marvell_nfc_prepare_cmd() | |
504 | * -> activate the ND_RUN bit that will kind of 'start a job' | |
505 | * -> wait the signal indicating the NFC is waiting for a command | |
506 | * - send the command (cmd and address cycles) | |
507 | * - enventually send or receive the data | |
508 | * - call marvell_nfc_end_cmd() with the corresponding flag | |
509 | * -> wait the flag to be triggered or cancel the job with a timeout | |
510 | * | |
511 | * The following helpers are here to factorize the code a bit so that | |
512 | * specialized functions responsible for executing the actual NAND | |
513 | * operations do not have to replicate the same code blocks. | |
514 | */ | |
515 | static int marvell_nfc_prepare_cmd(struct nand_chip *chip) | |
516 | { | |
517 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
518 | u32 ndcr, val; | |
519 | int ret; | |
520 | ||
521 | /* Poll ND_RUN and clear NDSR before issuing any command */ | |
522 | ret = marvell_nfc_wait_ndrun(chip); | |
523 | if (ret) { | |
a76497dc | 524 | dev_err(nfc->dev, "Last operation did not succeed\n"); |
02f26ecf MR |
525 | return ret; |
526 | } | |
527 | ||
528 | ndcr = readl_relaxed(nfc->regs + NDCR); | |
529 | writel_relaxed(readl(nfc->regs + NDSR), nfc->regs + NDSR); | |
530 | ||
531 | /* Assert ND_RUN bit and wait the NFC to be ready */ | |
532 | writel_relaxed(ndcr | NDCR_ND_RUN, nfc->regs + NDCR); | |
533 | ret = readl_relaxed_poll_timeout(nfc->regs + NDSR, val, | |
534 | val & NDSR_WRCMDREQ, | |
535 | POLL_PERIOD, POLL_TIMEOUT); | |
536 | if (ret) { | |
537 | dev_err(nfc->dev, "Timeout on WRCMDRE\n"); | |
538 | return -ETIMEDOUT; | |
539 | } | |
540 | ||
541 | /* Command may be written, clear WRCMDREQ status bit */ | |
542 | writel_relaxed(NDSR_WRCMDREQ, nfc->regs + NDSR); | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
547 | static void marvell_nfc_send_cmd(struct nand_chip *chip, | |
548 | struct marvell_nfc_op *nfc_op) | |
549 | { | |
550 | struct marvell_nand_chip *marvell_nand = to_marvell_nand(chip); | |
551 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
552 | ||
553 | dev_dbg(nfc->dev, "\nNDCR: 0x%08x\n" | |
554 | "NDCB0: 0x%08x\nNDCB1: 0x%08x\nNDCB2: 0x%08x\nNDCB3: 0x%08x\n", | |
555 | (u32)readl_relaxed(nfc->regs + NDCR), nfc_op->ndcb[0], | |
556 | nfc_op->ndcb[1], nfc_op->ndcb[2], nfc_op->ndcb[3]); | |
557 | ||
558 | writel_relaxed(to_nand_sel(marvell_nand)->ndcb0_csel | nfc_op->ndcb[0], | |
559 | nfc->regs + NDCB0); | |
560 | writel_relaxed(nfc_op->ndcb[1], nfc->regs + NDCB0); | |
561 | writel(nfc_op->ndcb[2], nfc->regs + NDCB0); | |
562 | ||
563 | /* | |
564 | * Write NDCB0 four times only if LEN_OVRD is set or if ADDR6 or ADDR7 | |
565 | * fields are used (only available on NFCv2). | |
566 | */ | |
567 | if (nfc_op->ndcb[0] & NDCB0_LEN_OVRD || | |
568 | NDCB0_ADDR_GET_NUM_CYC(nfc_op->ndcb[0]) >= 6) { | |
569 | if (!WARN_ON_ONCE(!nfc->caps->is_nfcv2)) | |
570 | writel(nfc_op->ndcb[3], nfc->regs + NDCB0); | |
571 | } | |
572 | } | |
573 | ||
574 | static int marvell_nfc_end_cmd(struct nand_chip *chip, int flag, | |
575 | const char *label) | |
576 | { | |
577 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
578 | u32 val; | |
579 | int ret; | |
580 | ||
581 | ret = readl_relaxed_poll_timeout(nfc->regs + NDSR, val, | |
582 | val & flag, | |
583 | POLL_PERIOD, POLL_TIMEOUT); | |
584 | ||
585 | if (ret) { | |
586 | dev_err(nfc->dev, "Timeout on %s (NDSR: 0x%08x)\n", | |
587 | label, val); | |
588 | if (nfc->dma_chan) | |
589 | dmaengine_terminate_all(nfc->dma_chan); | |
590 | return ret; | |
591 | } | |
592 | ||
593 | /* | |
594 | * DMA function uses this helper to poll on CMDD bits without wanting | |
595 | * them to be cleared. | |
596 | */ | |
597 | if (nfc->use_dma && (readl_relaxed(nfc->regs + NDCR) & NDCR_DMA_EN)) | |
598 | return 0; | |
599 | ||
600 | writel_relaxed(flag, nfc->regs + NDSR); | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
605 | static int marvell_nfc_wait_cmdd(struct nand_chip *chip) | |
606 | { | |
607 | struct marvell_nand_chip *marvell_nand = to_marvell_nand(chip); | |
608 | int cs_flag = NDSR_CMDD(to_nand_sel(marvell_nand)->ndcb0_csel); | |
609 | ||
610 | return marvell_nfc_end_cmd(chip, cs_flag, "CMDD"); | |
611 | } | |
612 | ||
613 | static int marvell_nfc_wait_op(struct nand_chip *chip, unsigned int timeout_ms) | |
614 | { | |
615 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
616 | int ret; | |
617 | ||
618 | /* Timeout is expressed in ms */ | |
619 | if (!timeout_ms) | |
620 | timeout_ms = IRQ_TIMEOUT; | |
621 | ||
622 | init_completion(&nfc->complete); | |
623 | ||
624 | marvell_nfc_enable_int(nfc, NDCR_RDYM); | |
625 | ret = wait_for_completion_timeout(&nfc->complete, | |
626 | msecs_to_jiffies(timeout_ms)); | |
627 | marvell_nfc_disable_int(nfc, NDCR_RDYM); | |
628 | marvell_nfc_clear_int(nfc, NDSR_RDY(0) | NDSR_RDY(1)); | |
629 | if (!ret) { | |
630 | dev_err(nfc->dev, "Timeout waiting for RB signal\n"); | |
631 | return -ETIMEDOUT; | |
632 | } | |
633 | ||
634 | return 0; | |
635 | } | |
636 | ||
637 | static void marvell_nfc_select_chip(struct mtd_info *mtd, int die_nr) | |
638 | { | |
639 | struct nand_chip *chip = mtd_to_nand(mtd); | |
640 | struct marvell_nand_chip *marvell_nand = to_marvell_nand(chip); | |
641 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
642 | u32 ndcr_generic; | |
643 | ||
644 | if (chip == nfc->selected_chip && die_nr == marvell_nand->selected_die) | |
645 | return; | |
646 | ||
647 | if (die_nr < 0 || die_nr >= marvell_nand->nsels) { | |
648 | nfc->selected_chip = NULL; | |
649 | marvell_nand->selected_die = -1; | |
650 | return; | |
651 | } | |
652 | ||
02f26ecf MR |
653 | writel_relaxed(marvell_nand->ndtr0, nfc->regs + NDTR0); |
654 | writel_relaxed(marvell_nand->ndtr1, nfc->regs + NDTR1); | |
655 | ||
656 | /* | |
657 | * Reset the NDCR register to a clean state for this particular chip, | |
658 | * also clear ND_RUN bit. | |
659 | */ | |
660 | ndcr_generic = readl_relaxed(nfc->regs + NDCR) & | |
661 | NDCR_GENERIC_FIELDS_MASK & ~NDCR_ND_RUN; | |
662 | writel_relaxed(ndcr_generic | marvell_nand->ndcr, nfc->regs + NDCR); | |
663 | ||
664 | /* Also reset the interrupt status register */ | |
665 | marvell_nfc_clear_int(nfc, NDCR_ALL_INT); | |
666 | ||
667 | nfc->selected_chip = chip; | |
668 | marvell_nand->selected_die = die_nr; | |
669 | } | |
670 | ||
671 | static irqreturn_t marvell_nfc_isr(int irq, void *dev_id) | |
672 | { | |
673 | struct marvell_nfc *nfc = dev_id; | |
674 | u32 st = readl_relaxed(nfc->regs + NDSR); | |
675 | u32 ien = (~readl_relaxed(nfc->regs + NDCR)) & NDCR_ALL_INT; | |
676 | ||
677 | /* | |
678 | * RDY interrupt mask is one bit in NDCR while there are two status | |
679 | * bit in NDSR (RDY[cs0/cs2] and RDY[cs1/cs3]). | |
680 | */ | |
681 | if (st & NDSR_RDY(1)) | |
682 | st |= NDSR_RDY(0); | |
683 | ||
684 | if (!(st & ien)) | |
685 | return IRQ_NONE; | |
686 | ||
687 | marvell_nfc_disable_int(nfc, st & NDCR_ALL_INT); | |
688 | ||
689 | if (!(st & (NDSR_RDDREQ | NDSR_WRDREQ | NDSR_WRCMDREQ))) | |
690 | complete(&nfc->complete); | |
691 | ||
692 | return IRQ_HANDLED; | |
693 | } | |
694 | ||
695 | /* HW ECC related functions */ | |
696 | static void marvell_nfc_enable_hw_ecc(struct nand_chip *chip) | |
697 | { | |
698 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
699 | u32 ndcr = readl_relaxed(nfc->regs + NDCR); | |
700 | ||
701 | if (!(ndcr & NDCR_ECC_EN)) { | |
702 | writel_relaxed(ndcr | NDCR_ECC_EN, nfc->regs + NDCR); | |
703 | ||
704 | /* | |
705 | * When enabling BCH, set threshold to 0 to always know the | |
706 | * number of corrected bitflips. | |
707 | */ | |
708 | if (chip->ecc.algo == NAND_ECC_BCH) | |
709 | writel_relaxed(NDECCCTRL_BCH_EN, nfc->regs + NDECCCTRL); | |
710 | } | |
711 | } | |
712 | ||
713 | static void marvell_nfc_disable_hw_ecc(struct nand_chip *chip) | |
714 | { | |
715 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
716 | u32 ndcr = readl_relaxed(nfc->regs + NDCR); | |
717 | ||
718 | if (ndcr & NDCR_ECC_EN) { | |
719 | writel_relaxed(ndcr & ~NDCR_ECC_EN, nfc->regs + NDCR); | |
720 | if (chip->ecc.algo == NAND_ECC_BCH) | |
721 | writel_relaxed(0, nfc->regs + NDECCCTRL); | |
722 | } | |
723 | } | |
724 | ||
725 | /* DMA related helpers */ | |
726 | static void marvell_nfc_enable_dma(struct marvell_nfc *nfc) | |
727 | { | |
728 | u32 reg; | |
729 | ||
730 | reg = readl_relaxed(nfc->regs + NDCR); | |
731 | writel_relaxed(reg | NDCR_DMA_EN, nfc->regs + NDCR); | |
732 | } | |
733 | ||
734 | static void marvell_nfc_disable_dma(struct marvell_nfc *nfc) | |
735 | { | |
736 | u32 reg; | |
737 | ||
738 | reg = readl_relaxed(nfc->regs + NDCR); | |
739 | writel_relaxed(reg & ~NDCR_DMA_EN, nfc->regs + NDCR); | |
740 | } | |
741 | ||
742 | /* Read/write PIO/DMA accessors */ | |
743 | static int marvell_nfc_xfer_data_dma(struct marvell_nfc *nfc, | |
744 | enum dma_data_direction direction, | |
745 | unsigned int len) | |
746 | { | |
747 | unsigned int dma_len = min_t(int, ALIGN(len, 32), MAX_CHUNK_SIZE); | |
748 | struct dma_async_tx_descriptor *tx; | |
749 | struct scatterlist sg; | |
750 | dma_cookie_t cookie; | |
751 | int ret; | |
752 | ||
753 | marvell_nfc_enable_dma(nfc); | |
754 | /* Prepare the DMA transfer */ | |
755 | sg_init_one(&sg, nfc->dma_buf, dma_len); | |
756 | dma_map_sg(nfc->dma_chan->device->dev, &sg, 1, direction); | |
757 | tx = dmaengine_prep_slave_sg(nfc->dma_chan, &sg, 1, | |
758 | direction == DMA_FROM_DEVICE ? | |
759 | DMA_DEV_TO_MEM : DMA_MEM_TO_DEV, | |
760 | DMA_PREP_INTERRUPT); | |
761 | if (!tx) { | |
762 | dev_err(nfc->dev, "Could not prepare DMA S/G list\n"); | |
763 | return -ENXIO; | |
764 | } | |
765 | ||
766 | /* Do the task and wait for it to finish */ | |
767 | cookie = dmaengine_submit(tx); | |
768 | ret = dma_submit_error(cookie); | |
769 | if (ret) | |
770 | return -EIO; | |
771 | ||
772 | dma_async_issue_pending(nfc->dma_chan); | |
773 | ret = marvell_nfc_wait_cmdd(nfc->selected_chip); | |
774 | dma_unmap_sg(nfc->dma_chan->device->dev, &sg, 1, direction); | |
775 | marvell_nfc_disable_dma(nfc); | |
776 | if (ret) { | |
777 | dev_err(nfc->dev, "Timeout waiting for DMA (status: %d)\n", | |
778 | dmaengine_tx_status(nfc->dma_chan, cookie, NULL)); | |
779 | dmaengine_terminate_all(nfc->dma_chan); | |
780 | return -ETIMEDOUT; | |
781 | } | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | static int marvell_nfc_xfer_data_in_pio(struct marvell_nfc *nfc, u8 *in, | |
787 | unsigned int len) | |
788 | { | |
789 | unsigned int last_len = len % FIFO_DEPTH; | |
790 | unsigned int last_full_offset = round_down(len, FIFO_DEPTH); | |
791 | int i; | |
792 | ||
793 | for (i = 0; i < last_full_offset; i += FIFO_DEPTH) | |
794 | ioread32_rep(nfc->regs + NDDB, in + i, FIFO_REP(FIFO_DEPTH)); | |
795 | ||
796 | if (last_len) { | |
797 | u8 tmp_buf[FIFO_DEPTH]; | |
798 | ||
799 | ioread32_rep(nfc->regs + NDDB, tmp_buf, FIFO_REP(FIFO_DEPTH)); | |
800 | memcpy(in + last_full_offset, tmp_buf, last_len); | |
801 | } | |
802 | ||
803 | return 0; | |
804 | } | |
805 | ||
806 | static int marvell_nfc_xfer_data_out_pio(struct marvell_nfc *nfc, const u8 *out, | |
807 | unsigned int len) | |
808 | { | |
809 | unsigned int last_len = len % FIFO_DEPTH; | |
810 | unsigned int last_full_offset = round_down(len, FIFO_DEPTH); | |
811 | int i; | |
812 | ||
813 | for (i = 0; i < last_full_offset; i += FIFO_DEPTH) | |
814 | iowrite32_rep(nfc->regs + NDDB, out + i, FIFO_REP(FIFO_DEPTH)); | |
815 | ||
816 | if (last_len) { | |
817 | u8 tmp_buf[FIFO_DEPTH]; | |
818 | ||
819 | memcpy(tmp_buf, out + last_full_offset, last_len); | |
820 | iowrite32_rep(nfc->regs + NDDB, tmp_buf, FIFO_REP(FIFO_DEPTH)); | |
821 | } | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
826 | static void marvell_nfc_check_empty_chunk(struct nand_chip *chip, | |
827 | u8 *data, int data_len, | |
828 | u8 *spare, int spare_len, | |
829 | u8 *ecc, int ecc_len, | |
830 | unsigned int *max_bitflips) | |
831 | { | |
832 | struct mtd_info *mtd = nand_to_mtd(chip); | |
833 | int bf; | |
834 | ||
835 | /* | |
836 | * Blank pages (all 0xFF) that have not been written may be recognized | |
837 | * as bad if bitflips occur, so whenever an uncorrectable error occurs, | |
838 | * check if the entire page (with ECC bytes) is actually blank or not. | |
839 | */ | |
840 | if (!data) | |
841 | data_len = 0; | |
842 | if (!spare) | |
843 | spare_len = 0; | |
844 | if (!ecc) | |
845 | ecc_len = 0; | |
846 | ||
847 | bf = nand_check_erased_ecc_chunk(data, data_len, ecc, ecc_len, | |
848 | spare, spare_len, chip->ecc.strength); | |
849 | if (bf < 0) { | |
850 | mtd->ecc_stats.failed++; | |
851 | return; | |
852 | } | |
853 | ||
854 | /* Update the stats and max_bitflips */ | |
855 | mtd->ecc_stats.corrected += bf; | |
856 | *max_bitflips = max_t(unsigned int, *max_bitflips, bf); | |
857 | } | |
858 | ||
859 | /* | |
860 | * Check a chunk is correct or not according to hardware ECC engine. | |
861 | * mtd->ecc_stats.corrected is updated, as well as max_bitflips, however | |
862 | * mtd->ecc_stats.failure is not, the function will instead return a non-zero | |
863 | * value indicating that a check on the emptyness of the subpage must be | |
864 | * performed before declaring the subpage corrupted. | |
865 | */ | |
866 | static int marvell_nfc_hw_ecc_correct(struct nand_chip *chip, | |
867 | unsigned int *max_bitflips) | |
868 | { | |
869 | struct mtd_info *mtd = nand_to_mtd(chip); | |
870 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
871 | int bf = 0; | |
872 | u32 ndsr; | |
873 | ||
874 | ndsr = readl_relaxed(nfc->regs + NDSR); | |
875 | ||
876 | /* Check uncorrectable error flag */ | |
877 | if (ndsr & NDSR_UNCERR) { | |
878 | writel_relaxed(ndsr, nfc->regs + NDSR); | |
879 | ||
880 | /* | |
881 | * Do not increment ->ecc_stats.failed now, instead, return a | |
882 | * non-zero value to indicate that this chunk was apparently | |
883 | * bad, and it should be check to see if it empty or not. If | |
884 | * the chunk (with ECC bytes) is not declared empty, the calling | |
885 | * function must increment the failure count. | |
886 | */ | |
887 | return -EBADMSG; | |
888 | } | |
889 | ||
890 | /* Check correctable error flag */ | |
891 | if (ndsr & NDSR_CORERR) { | |
892 | writel_relaxed(ndsr, nfc->regs + NDSR); | |
893 | ||
894 | if (chip->ecc.algo == NAND_ECC_BCH) | |
895 | bf = NDSR_ERRCNT(ndsr); | |
896 | else | |
897 | bf = 1; | |
898 | } | |
899 | ||
900 | /* Update the stats and max_bitflips */ | |
901 | mtd->ecc_stats.corrected += bf; | |
902 | *max_bitflips = max_t(unsigned int, *max_bitflips, bf); | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
907 | /* Hamming read helpers */ | |
908 | static int marvell_nfc_hw_ecc_hmg_do_read_page(struct nand_chip *chip, | |
909 | u8 *data_buf, u8 *oob_buf, | |
910 | bool raw, int page) | |
911 | { | |
912 | struct marvell_nand_chip *marvell_nand = to_marvell_nand(chip); | |
913 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
914 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
915 | struct marvell_nfc_op nfc_op = { | |
916 | .ndcb[0] = NDCB0_CMD_TYPE(TYPE_READ) | | |
917 | NDCB0_ADDR_CYC(marvell_nand->addr_cyc) | | |
918 | NDCB0_DBC | | |
919 | NDCB0_CMD1(NAND_CMD_READ0) | | |
920 | NDCB0_CMD2(NAND_CMD_READSTART), | |
921 | .ndcb[1] = NDCB1_ADDRS_PAGE(page), | |
922 | .ndcb[2] = NDCB2_ADDR5_PAGE(page), | |
923 | }; | |
924 | unsigned int oob_bytes = lt->spare_bytes + (raw ? lt->ecc_bytes : 0); | |
925 | int ret; | |
926 | ||
927 | /* NFCv2 needs more information about the operation being executed */ | |
928 | if (nfc->caps->is_nfcv2) | |
929 | nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_MONOLITHIC_RW); | |
930 | ||
931 | ret = marvell_nfc_prepare_cmd(chip); | |
932 | if (ret) | |
933 | return ret; | |
934 | ||
935 | marvell_nfc_send_cmd(chip, &nfc_op); | |
936 | ret = marvell_nfc_end_cmd(chip, NDSR_RDDREQ, | |
937 | "RDDREQ while draining FIFO (data/oob)"); | |
938 | if (ret) | |
939 | return ret; | |
940 | ||
941 | /* | |
942 | * Read the page then the OOB area. Unlike what is shown in current | |
943 | * documentation, spare bytes are protected by the ECC engine, and must | |
944 | * be at the beginning of the OOB area or running this driver on legacy | |
945 | * systems will prevent the discovery of the BBM/BBT. | |
946 | */ | |
947 | if (nfc->use_dma) { | |
948 | marvell_nfc_xfer_data_dma(nfc, DMA_FROM_DEVICE, | |
949 | lt->data_bytes + oob_bytes); | |
950 | memcpy(data_buf, nfc->dma_buf, lt->data_bytes); | |
951 | memcpy(oob_buf, nfc->dma_buf + lt->data_bytes, oob_bytes); | |
952 | } else { | |
953 | marvell_nfc_xfer_data_in_pio(nfc, data_buf, lt->data_bytes); | |
954 | marvell_nfc_xfer_data_in_pio(nfc, oob_buf, oob_bytes); | |
955 | } | |
956 | ||
957 | ret = marvell_nfc_wait_cmdd(chip); | |
958 | ||
959 | return ret; | |
960 | } | |
961 | ||
962 | static int marvell_nfc_hw_ecc_hmg_read_page_raw(struct mtd_info *mtd, | |
963 | struct nand_chip *chip, u8 *buf, | |
964 | int oob_required, int page) | |
965 | { | |
966 | return marvell_nfc_hw_ecc_hmg_do_read_page(chip, buf, chip->oob_poi, | |
967 | true, page); | |
968 | } | |
969 | ||
970 | static int marvell_nfc_hw_ecc_hmg_read_page(struct mtd_info *mtd, | |
971 | struct nand_chip *chip, | |
972 | u8 *buf, int oob_required, | |
973 | int page) | |
974 | { | |
975 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
976 | unsigned int full_sz = lt->data_bytes + lt->spare_bytes + lt->ecc_bytes; | |
977 | int max_bitflips = 0, ret; | |
978 | u8 *raw_buf; | |
979 | ||
980 | marvell_nfc_enable_hw_ecc(chip); | |
981 | marvell_nfc_hw_ecc_hmg_do_read_page(chip, buf, chip->oob_poi, false, | |
982 | page); | |
983 | ret = marvell_nfc_hw_ecc_correct(chip, &max_bitflips); | |
984 | marvell_nfc_disable_hw_ecc(chip); | |
985 | ||
986 | if (!ret) | |
987 | return max_bitflips; | |
988 | ||
989 | /* | |
990 | * When ECC failures are detected, check if the full page has been | |
991 | * written or not. Ignore the failure if it is actually empty. | |
992 | */ | |
993 | raw_buf = kmalloc(full_sz, GFP_KERNEL); | |
994 | if (!raw_buf) | |
995 | return -ENOMEM; | |
996 | ||
997 | marvell_nfc_hw_ecc_hmg_do_read_page(chip, raw_buf, raw_buf + | |
998 | lt->data_bytes, true, page); | |
999 | marvell_nfc_check_empty_chunk(chip, raw_buf, full_sz, NULL, 0, NULL, 0, | |
1000 | &max_bitflips); | |
1001 | kfree(raw_buf); | |
1002 | ||
1003 | return max_bitflips; | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * Spare area in Hamming layouts is not protected by the ECC engine (even if | |
1008 | * it appears before the ECC bytes when reading), the ->read_oob_raw() function | |
1009 | * also stands for ->read_oob(). | |
1010 | */ | |
1011 | static int marvell_nfc_hw_ecc_hmg_read_oob_raw(struct mtd_info *mtd, | |
1012 | struct nand_chip *chip, int page) | |
1013 | { | |
1014 | /* Invalidate page cache */ | |
1015 | chip->pagebuf = -1; | |
1016 | ||
1017 | return marvell_nfc_hw_ecc_hmg_do_read_page(chip, chip->data_buf, | |
1018 | chip->oob_poi, true, page); | |
1019 | } | |
1020 | ||
1021 | /* Hamming write helpers */ | |
1022 | static int marvell_nfc_hw_ecc_hmg_do_write_page(struct nand_chip *chip, | |
1023 | const u8 *data_buf, | |
1024 | const u8 *oob_buf, bool raw, | |
1025 | int page) | |
1026 | { | |
1027 | struct marvell_nand_chip *marvell_nand = to_marvell_nand(chip); | |
1028 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
1029 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
1030 | struct marvell_nfc_op nfc_op = { | |
1031 | .ndcb[0] = NDCB0_CMD_TYPE(TYPE_WRITE) | | |
1032 | NDCB0_ADDR_CYC(marvell_nand->addr_cyc) | | |
1033 | NDCB0_CMD1(NAND_CMD_SEQIN) | | |
1034 | NDCB0_CMD2(NAND_CMD_PAGEPROG) | | |
1035 | NDCB0_DBC, | |
1036 | .ndcb[1] = NDCB1_ADDRS_PAGE(page), | |
1037 | .ndcb[2] = NDCB2_ADDR5_PAGE(page), | |
1038 | }; | |
1039 | unsigned int oob_bytes = lt->spare_bytes + (raw ? lt->ecc_bytes : 0); | |
1040 | int ret; | |
1041 | ||
1042 | /* NFCv2 needs more information about the operation being executed */ | |
1043 | if (nfc->caps->is_nfcv2) | |
1044 | nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_MONOLITHIC_RW); | |
1045 | ||
1046 | ret = marvell_nfc_prepare_cmd(chip); | |
1047 | if (ret) | |
1048 | return ret; | |
1049 | ||
1050 | marvell_nfc_send_cmd(chip, &nfc_op); | |
1051 | ret = marvell_nfc_end_cmd(chip, NDSR_WRDREQ, | |
1052 | "WRDREQ while loading FIFO (data)"); | |
1053 | if (ret) | |
1054 | return ret; | |
1055 | ||
1056 | /* Write the page then the OOB area */ | |
1057 | if (nfc->use_dma) { | |
1058 | memcpy(nfc->dma_buf, data_buf, lt->data_bytes); | |
1059 | memcpy(nfc->dma_buf + lt->data_bytes, oob_buf, oob_bytes); | |
1060 | marvell_nfc_xfer_data_dma(nfc, DMA_TO_DEVICE, lt->data_bytes + | |
1061 | lt->ecc_bytes + lt->spare_bytes); | |
1062 | } else { | |
1063 | marvell_nfc_xfer_data_out_pio(nfc, data_buf, lt->data_bytes); | |
1064 | marvell_nfc_xfer_data_out_pio(nfc, oob_buf, oob_bytes); | |
1065 | } | |
1066 | ||
1067 | ret = marvell_nfc_wait_cmdd(chip); | |
1068 | if (ret) | |
1069 | return ret; | |
1070 | ||
1071 | ret = marvell_nfc_wait_op(chip, | |
b76401fc | 1072 | PSEC_TO_MSEC(chip->data_interface.timings.sdr.tPROG_max)); |
02f26ecf MR |
1073 | return ret; |
1074 | } | |
1075 | ||
1076 | static int marvell_nfc_hw_ecc_hmg_write_page_raw(struct mtd_info *mtd, | |
1077 | struct nand_chip *chip, | |
1078 | const u8 *buf, | |
1079 | int oob_required, int page) | |
1080 | { | |
1081 | return marvell_nfc_hw_ecc_hmg_do_write_page(chip, buf, chip->oob_poi, | |
1082 | true, page); | |
1083 | } | |
1084 | ||
1085 | static int marvell_nfc_hw_ecc_hmg_write_page(struct mtd_info *mtd, | |
1086 | struct nand_chip *chip, | |
1087 | const u8 *buf, | |
1088 | int oob_required, int page) | |
1089 | { | |
1090 | int ret; | |
1091 | ||
1092 | marvell_nfc_enable_hw_ecc(chip); | |
1093 | ret = marvell_nfc_hw_ecc_hmg_do_write_page(chip, buf, chip->oob_poi, | |
1094 | false, page); | |
1095 | marvell_nfc_disable_hw_ecc(chip); | |
1096 | ||
1097 | return ret; | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * Spare area in Hamming layouts is not protected by the ECC engine (even if | |
1102 | * it appears before the ECC bytes when reading), the ->write_oob_raw() function | |
1103 | * also stands for ->write_oob(). | |
1104 | */ | |
1105 | static int marvell_nfc_hw_ecc_hmg_write_oob_raw(struct mtd_info *mtd, | |
1106 | struct nand_chip *chip, | |
1107 | int page) | |
1108 | { | |
1109 | /* Invalidate page cache */ | |
1110 | chip->pagebuf = -1; | |
1111 | ||
1112 | memset(chip->data_buf, 0xFF, mtd->writesize); | |
1113 | ||
1114 | return marvell_nfc_hw_ecc_hmg_do_write_page(chip, chip->data_buf, | |
1115 | chip->oob_poi, true, page); | |
1116 | } | |
1117 | ||
1118 | /* BCH read helpers */ | |
1119 | static int marvell_nfc_hw_ecc_bch_read_page_raw(struct mtd_info *mtd, | |
1120 | struct nand_chip *chip, u8 *buf, | |
1121 | int oob_required, int page) | |
1122 | { | |
1123 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
1124 | u8 *oob = chip->oob_poi; | |
1125 | int chunk_size = lt->data_bytes + lt->spare_bytes + lt->ecc_bytes; | |
1126 | int ecc_offset = (lt->full_chunk_cnt * lt->spare_bytes) + | |
1127 | lt->last_spare_bytes; | |
1128 | int data_len = lt->data_bytes; | |
1129 | int spare_len = lt->spare_bytes; | |
1130 | int ecc_len = lt->ecc_bytes; | |
1131 | int chunk; | |
1132 | ||
1133 | if (oob_required) | |
1134 | memset(chip->oob_poi, 0xFF, mtd->oobsize); | |
1135 | ||
1136 | nand_read_page_op(chip, page, 0, NULL, 0); | |
1137 | ||
1138 | for (chunk = 0; chunk < lt->nchunks; chunk++) { | |
1139 | /* Update last chunk length */ | |
1140 | if (chunk >= lt->full_chunk_cnt) { | |
1141 | data_len = lt->last_data_bytes; | |
1142 | spare_len = lt->last_spare_bytes; | |
1143 | ecc_len = lt->last_ecc_bytes; | |
1144 | } | |
1145 | ||
1146 | /* Read data bytes*/ | |
1147 | nand_change_read_column_op(chip, chunk * chunk_size, | |
1148 | buf + (lt->data_bytes * chunk), | |
1149 | data_len, false); | |
1150 | ||
1151 | /* Read spare bytes */ | |
1152 | nand_read_data_op(chip, oob + (lt->spare_bytes * chunk), | |
1153 | spare_len, false); | |
1154 | ||
1155 | /* Read ECC bytes */ | |
1156 | nand_read_data_op(chip, oob + ecc_offset + | |
1157 | (ALIGN(lt->ecc_bytes, 32) * chunk), | |
1158 | ecc_len, false); | |
1159 | } | |
1160 | ||
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | static void marvell_nfc_hw_ecc_bch_read_chunk(struct nand_chip *chip, int chunk, | |
1165 | u8 *data, unsigned int data_len, | |
1166 | u8 *spare, unsigned int spare_len, | |
1167 | int page) | |
1168 | { | |
1169 | struct marvell_nand_chip *marvell_nand = to_marvell_nand(chip); | |
1170 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
1171 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
1172 | int i, ret; | |
1173 | struct marvell_nfc_op nfc_op = { | |
1174 | .ndcb[0] = NDCB0_CMD_TYPE(TYPE_READ) | | |
1175 | NDCB0_ADDR_CYC(marvell_nand->addr_cyc) | | |
1176 | NDCB0_LEN_OVRD, | |
1177 | .ndcb[1] = NDCB1_ADDRS_PAGE(page), | |
1178 | .ndcb[2] = NDCB2_ADDR5_PAGE(page), | |
1179 | .ndcb[3] = data_len + spare_len, | |
1180 | }; | |
1181 | ||
1182 | ret = marvell_nfc_prepare_cmd(chip); | |
1183 | if (ret) | |
1184 | return; | |
1185 | ||
1186 | if (chunk == 0) | |
1187 | nfc_op.ndcb[0] |= NDCB0_DBC | | |
1188 | NDCB0_CMD1(NAND_CMD_READ0) | | |
1189 | NDCB0_CMD2(NAND_CMD_READSTART); | |
1190 | ||
1191 | /* | |
90d61763 BB |
1192 | * Trigger the monolithic read on the first chunk, then naked read on |
1193 | * intermediate chunks and finally a last naked read on the last chunk. | |
02f26ecf | 1194 | */ |
90d61763 | 1195 | if (chunk == 0) |
02f26ecf | 1196 | nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_MONOLITHIC_RW); |
90d61763 BB |
1197 | else if (chunk < lt->nchunks - 1) |
1198 | nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_NAKED_RW); | |
02f26ecf MR |
1199 | else |
1200 | nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_LAST_NAKED_RW); | |
1201 | ||
1202 | marvell_nfc_send_cmd(chip, &nfc_op); | |
1203 | ||
1204 | /* | |
1205 | * According to the datasheet, when reading from NDDB | |
1206 | * with BCH enabled, after each 32 bytes reads, we | |
1207 | * have to make sure that the NDSR.RDDREQ bit is set. | |
1208 | * | |
1209 | * Drain the FIFO, 8 32-bit reads at a time, and skip | |
1210 | * the polling on the last read. | |
1211 | * | |
1212 | * Length is a multiple of 32 bytes, hence it is a multiple of 8 too. | |
1213 | */ | |
1214 | for (i = 0; i < data_len; i += FIFO_DEPTH * BCH_SEQ_READS) { | |
1215 | marvell_nfc_end_cmd(chip, NDSR_RDDREQ, | |
1216 | "RDDREQ while draining FIFO (data)"); | |
1217 | marvell_nfc_xfer_data_in_pio(nfc, data, | |
1218 | FIFO_DEPTH * BCH_SEQ_READS); | |
1219 | data += FIFO_DEPTH * BCH_SEQ_READS; | |
1220 | } | |
1221 | ||
1222 | for (i = 0; i < spare_len; i += FIFO_DEPTH * BCH_SEQ_READS) { | |
1223 | marvell_nfc_end_cmd(chip, NDSR_RDDREQ, | |
1224 | "RDDREQ while draining FIFO (OOB)"); | |
1225 | marvell_nfc_xfer_data_in_pio(nfc, spare, | |
1226 | FIFO_DEPTH * BCH_SEQ_READS); | |
1227 | spare += FIFO_DEPTH * BCH_SEQ_READS; | |
1228 | } | |
1229 | } | |
1230 | ||
1231 | static int marvell_nfc_hw_ecc_bch_read_page(struct mtd_info *mtd, | |
1232 | struct nand_chip *chip, | |
1233 | u8 *buf, int oob_required, | |
1234 | int page) | |
1235 | { | |
1236 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
1237 | int data_len = lt->data_bytes, spare_len = lt->spare_bytes, ecc_len; | |
1238 | u8 *data = buf, *spare = chip->oob_poi, *ecc; | |
1239 | int max_bitflips = 0; | |
1240 | u32 failure_mask = 0; | |
1241 | int chunk, ecc_offset_in_page, ret; | |
1242 | ||
1243 | /* | |
1244 | * With BCH, OOB is not fully used (and thus not read entirely), not | |
1245 | * expected bytes could show up at the end of the OOB buffer if not | |
1246 | * explicitly erased. | |
1247 | */ | |
1248 | if (oob_required) | |
1249 | memset(chip->oob_poi, 0xFF, mtd->oobsize); | |
1250 | ||
1251 | marvell_nfc_enable_hw_ecc(chip); | |
1252 | ||
1253 | for (chunk = 0; chunk < lt->nchunks; chunk++) { | |
1254 | /* Update length for the last chunk */ | |
1255 | if (chunk >= lt->full_chunk_cnt) { | |
1256 | data_len = lt->last_data_bytes; | |
1257 | spare_len = lt->last_spare_bytes; | |
1258 | } | |
1259 | ||
1260 | /* Read the chunk and detect number of bitflips */ | |
1261 | marvell_nfc_hw_ecc_bch_read_chunk(chip, chunk, data, data_len, | |
1262 | spare, spare_len, page); | |
1263 | ret = marvell_nfc_hw_ecc_correct(chip, &max_bitflips); | |
1264 | if (ret) | |
1265 | failure_mask |= BIT(chunk); | |
1266 | ||
1267 | data += data_len; | |
1268 | spare += spare_len; | |
1269 | } | |
1270 | ||
1271 | marvell_nfc_disable_hw_ecc(chip); | |
1272 | ||
1273 | if (!failure_mask) | |
1274 | return max_bitflips; | |
1275 | ||
1276 | /* | |
1277 | * Please note that dumping the ECC bytes during a normal read with OOB | |
1278 | * area would add a significant overhead as ECC bytes are "consumed" by | |
1279 | * the controller in normal mode and must be re-read in raw mode. To | |
1280 | * avoid dropping the performances, we prefer not to include them. The | |
1281 | * user should re-read the page in raw mode if ECC bytes are required. | |
1282 | * | |
1283 | * However, for any subpage read error reported by ->correct(), the ECC | |
1284 | * bytes must be read in raw mode and the full subpage must be checked | |
1285 | * to see if it is entirely empty of if there was an actual error. | |
1286 | */ | |
1287 | for (chunk = 0; chunk < lt->nchunks; chunk++) { | |
1288 | /* No failure reported for this chunk, move to the next one */ | |
1289 | if (!(failure_mask & BIT(chunk))) | |
1290 | continue; | |
1291 | ||
1292 | /* Derive ECC bytes positions (in page/buffer) and length */ | |
1293 | ecc = chip->oob_poi + | |
1294 | (lt->full_chunk_cnt * lt->spare_bytes) + | |
1295 | lt->last_spare_bytes + | |
1296 | (chunk * ALIGN(lt->ecc_bytes, 32)); | |
1297 | ecc_offset_in_page = | |
1298 | (chunk * (lt->data_bytes + lt->spare_bytes + | |
1299 | lt->ecc_bytes)) + | |
1300 | (chunk < lt->full_chunk_cnt ? | |
1301 | lt->data_bytes + lt->spare_bytes : | |
1302 | lt->last_data_bytes + lt->last_spare_bytes); | |
1303 | ecc_len = chunk < lt->full_chunk_cnt ? | |
1304 | lt->ecc_bytes : lt->last_ecc_bytes; | |
1305 | ||
1306 | /* Do the actual raw read of the ECC bytes */ | |
1307 | nand_change_read_column_op(chip, ecc_offset_in_page, | |
1308 | ecc, ecc_len, false); | |
1309 | ||
1310 | /* Derive data/spare bytes positions (in buffer) and length */ | |
1311 | data = buf + (chunk * lt->data_bytes); | |
1312 | data_len = chunk < lt->full_chunk_cnt ? | |
1313 | lt->data_bytes : lt->last_data_bytes; | |
1314 | spare = chip->oob_poi + (chunk * (lt->spare_bytes + | |
1315 | lt->ecc_bytes)); | |
1316 | spare_len = chunk < lt->full_chunk_cnt ? | |
1317 | lt->spare_bytes : lt->last_spare_bytes; | |
1318 | ||
1319 | /* Check the entire chunk (data + spare + ecc) for emptyness */ | |
1320 | marvell_nfc_check_empty_chunk(chip, data, data_len, spare, | |
1321 | spare_len, ecc, ecc_len, | |
1322 | &max_bitflips); | |
1323 | } | |
1324 | ||
1325 | return max_bitflips; | |
1326 | } | |
1327 | ||
1328 | static int marvell_nfc_hw_ecc_bch_read_oob_raw(struct mtd_info *mtd, | |
1329 | struct nand_chip *chip, int page) | |
1330 | { | |
1331 | /* Invalidate page cache */ | |
1332 | chip->pagebuf = -1; | |
1333 | ||
1334 | return chip->ecc.read_page_raw(mtd, chip, chip->data_buf, true, page); | |
1335 | } | |
1336 | ||
1337 | static int marvell_nfc_hw_ecc_bch_read_oob(struct mtd_info *mtd, | |
1338 | struct nand_chip *chip, int page) | |
1339 | { | |
1340 | /* Invalidate page cache */ | |
1341 | chip->pagebuf = -1; | |
1342 | ||
1343 | return chip->ecc.read_page(mtd, chip, chip->data_buf, true, page); | |
1344 | } | |
1345 | ||
1346 | /* BCH write helpers */ | |
1347 | static int marvell_nfc_hw_ecc_bch_write_page_raw(struct mtd_info *mtd, | |
1348 | struct nand_chip *chip, | |
1349 | const u8 *buf, | |
1350 | int oob_required, int page) | |
1351 | { | |
1352 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
1353 | int full_chunk_size = lt->data_bytes + lt->spare_bytes + lt->ecc_bytes; | |
1354 | int data_len = lt->data_bytes; | |
1355 | int spare_len = lt->spare_bytes; | |
1356 | int ecc_len = lt->ecc_bytes; | |
02f26ecf MR |
1357 | int spare_offset = 0; |
1358 | int ecc_offset = (lt->full_chunk_cnt * lt->spare_bytes) + | |
1359 | lt->last_spare_bytes; | |
1360 | int chunk; | |
1361 | ||
1362 | nand_prog_page_begin_op(chip, page, 0, NULL, 0); | |
1363 | ||
1364 | for (chunk = 0; chunk < lt->nchunks; chunk++) { | |
1365 | if (chunk >= lt->full_chunk_cnt) { | |
1366 | data_len = lt->last_data_bytes; | |
1367 | spare_len = lt->last_spare_bytes; | |
1368 | ecc_len = lt->last_ecc_bytes; | |
02f26ecf MR |
1369 | } |
1370 | ||
1371 | /* Point to the column of the next chunk */ | |
1372 | nand_change_write_column_op(chip, chunk * full_chunk_size, | |
1373 | NULL, 0, false); | |
1374 | ||
1375 | /* Write the data */ | |
1376 | nand_write_data_op(chip, buf + (chunk * lt->data_bytes), | |
1377 | data_len, false); | |
1378 | ||
1379 | if (!oob_required) | |
1380 | continue; | |
1381 | ||
1382 | /* Write the spare bytes */ | |
1383 | if (spare_len) | |
1384 | nand_write_data_op(chip, chip->oob_poi + spare_offset, | |
1385 | spare_len, false); | |
1386 | ||
1387 | /* Write the ECC bytes */ | |
1388 | if (ecc_len) | |
1389 | nand_write_data_op(chip, chip->oob_poi + ecc_offset, | |
1390 | ecc_len, false); | |
1391 | ||
1392 | spare_offset += spare_len; | |
1393 | ecc_offset += ALIGN(ecc_len, 32); | |
1394 | } | |
1395 | ||
1396 | return nand_prog_page_end_op(chip); | |
1397 | } | |
1398 | ||
1399 | static int | |
1400 | marvell_nfc_hw_ecc_bch_write_chunk(struct nand_chip *chip, int chunk, | |
1401 | const u8 *data, unsigned int data_len, | |
1402 | const u8 *spare, unsigned int spare_len, | |
1403 | int page) | |
1404 | { | |
1405 | struct marvell_nand_chip *marvell_nand = to_marvell_nand(chip); | |
1406 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
1407 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
a2ee41fd | 1408 | u32 xtype; |
02f26ecf MR |
1409 | int ret; |
1410 | struct marvell_nfc_op nfc_op = { | |
1411 | .ndcb[0] = NDCB0_CMD_TYPE(TYPE_WRITE) | NDCB0_LEN_OVRD, | |
1412 | .ndcb[3] = data_len + spare_len, | |
1413 | }; | |
1414 | ||
1415 | /* | |
1416 | * First operation dispatches the CMD_SEQIN command, issue the address | |
1417 | * cycles and asks for the first chunk of data. | |
1418 | * All operations in the middle (if any) will issue a naked write and | |
1419 | * also ask for data. | |
1420 | * Last operation (if any) asks for the last chunk of data through a | |
1421 | * last naked write. | |
1422 | */ | |
1423 | if (chunk == 0) { | |
a2ee41fd MR |
1424 | if (lt->nchunks == 1) |
1425 | xtype = XTYPE_MONOLITHIC_RW; | |
1426 | else | |
1427 | xtype = XTYPE_WRITE_DISPATCH; | |
1428 | ||
1429 | nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(xtype) | | |
02f26ecf MR |
1430 | NDCB0_ADDR_CYC(marvell_nand->addr_cyc) | |
1431 | NDCB0_CMD1(NAND_CMD_SEQIN); | |
1432 | nfc_op.ndcb[1] |= NDCB1_ADDRS_PAGE(page); | |
1433 | nfc_op.ndcb[2] |= NDCB2_ADDR5_PAGE(page); | |
1434 | } else if (chunk < lt->nchunks - 1) { | |
1435 | nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_NAKED_RW); | |
1436 | } else { | |
1437 | nfc_op.ndcb[0] |= NDCB0_CMD_XTYPE(XTYPE_LAST_NAKED_RW); | |
1438 | } | |
1439 | ||
1440 | /* Always dispatch the PAGEPROG command on the last chunk */ | |
1441 | if (chunk == lt->nchunks - 1) | |
1442 | nfc_op.ndcb[0] |= NDCB0_CMD2(NAND_CMD_PAGEPROG) | NDCB0_DBC; | |
1443 | ||
1444 | ret = marvell_nfc_prepare_cmd(chip); | |
1445 | if (ret) | |
1446 | return ret; | |
1447 | ||
1448 | marvell_nfc_send_cmd(chip, &nfc_op); | |
1449 | ret = marvell_nfc_end_cmd(chip, NDSR_WRDREQ, | |
1450 | "WRDREQ while loading FIFO (data)"); | |
1451 | if (ret) | |
1452 | return ret; | |
1453 | ||
1454 | /* Transfer the contents */ | |
1455 | iowrite32_rep(nfc->regs + NDDB, data, FIFO_REP(data_len)); | |
1456 | iowrite32_rep(nfc->regs + NDDB, spare, FIFO_REP(spare_len)); | |
1457 | ||
1458 | return 0; | |
1459 | } | |
1460 | ||
1461 | static int marvell_nfc_hw_ecc_bch_write_page(struct mtd_info *mtd, | |
1462 | struct nand_chip *chip, | |
1463 | const u8 *buf, | |
1464 | int oob_required, int page) | |
1465 | { | |
1466 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
1467 | const u8 *data = buf; | |
1468 | const u8 *spare = chip->oob_poi; | |
1469 | int data_len = lt->data_bytes; | |
1470 | int spare_len = lt->spare_bytes; | |
1471 | int chunk, ret; | |
1472 | ||
1473 | /* Spare data will be written anyway, so clear it to avoid garbage */ | |
1474 | if (!oob_required) | |
1475 | memset(chip->oob_poi, 0xFF, mtd->oobsize); | |
1476 | ||
1477 | marvell_nfc_enable_hw_ecc(chip); | |
1478 | ||
1479 | for (chunk = 0; chunk < lt->nchunks; chunk++) { | |
1480 | if (chunk >= lt->full_chunk_cnt) { | |
1481 | data_len = lt->last_data_bytes; | |
1482 | spare_len = lt->last_spare_bytes; | |
1483 | } | |
1484 | ||
1485 | marvell_nfc_hw_ecc_bch_write_chunk(chip, chunk, data, data_len, | |
1486 | spare, spare_len, page); | |
1487 | data += data_len; | |
1488 | spare += spare_len; | |
1489 | ||
1490 | /* | |
1491 | * Waiting only for CMDD or PAGED is not enough, ECC are | |
1492 | * partially written. No flag is set once the operation is | |
1493 | * really finished but the ND_RUN bit is cleared, so wait for it | |
1494 | * before stepping into the next command. | |
1495 | */ | |
1496 | marvell_nfc_wait_ndrun(chip); | |
1497 | } | |
1498 | ||
1499 | ret = marvell_nfc_wait_op(chip, | |
b76401fc | 1500 | PSEC_TO_MSEC(chip->data_interface.timings.sdr.tPROG_max)); |
02f26ecf MR |
1501 | |
1502 | marvell_nfc_disable_hw_ecc(chip); | |
1503 | ||
1504 | if (ret) | |
1505 | return ret; | |
1506 | ||
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | static int marvell_nfc_hw_ecc_bch_write_oob_raw(struct mtd_info *mtd, | |
1511 | struct nand_chip *chip, | |
1512 | int page) | |
1513 | { | |
1514 | /* Invalidate page cache */ | |
1515 | chip->pagebuf = -1; | |
1516 | ||
1517 | memset(chip->data_buf, 0xFF, mtd->writesize); | |
1518 | ||
1519 | return chip->ecc.write_page_raw(mtd, chip, chip->data_buf, true, page); | |
1520 | } | |
1521 | ||
1522 | static int marvell_nfc_hw_ecc_bch_write_oob(struct mtd_info *mtd, | |
1523 | struct nand_chip *chip, int page) | |
1524 | { | |
1525 | /* Invalidate page cache */ | |
1526 | chip->pagebuf = -1; | |
1527 | ||
1528 | memset(chip->data_buf, 0xFF, mtd->writesize); | |
1529 | ||
1530 | return chip->ecc.write_page(mtd, chip, chip->data_buf, true, page); | |
1531 | } | |
1532 | ||
1533 | /* NAND framework ->exec_op() hooks and related helpers */ | |
1534 | static void marvell_nfc_parse_instructions(struct nand_chip *chip, | |
1535 | const struct nand_subop *subop, | |
1536 | struct marvell_nfc_op *nfc_op) | |
1537 | { | |
1538 | const struct nand_op_instr *instr = NULL; | |
1539 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
1540 | bool first_cmd = true; | |
1541 | unsigned int op_id; | |
1542 | int i; | |
1543 | ||
1544 | /* Reset the input structure as most of its fields will be OR'ed */ | |
1545 | memset(nfc_op, 0, sizeof(struct marvell_nfc_op)); | |
1546 | ||
1547 | for (op_id = 0; op_id < subop->ninstrs; op_id++) { | |
1548 | unsigned int offset, naddrs; | |
1549 | const u8 *addrs; | |
1550 | int len = nand_subop_get_data_len(subop, op_id); | |
1551 | ||
1552 | instr = &subop->instrs[op_id]; | |
1553 | ||
1554 | switch (instr->type) { | |
1555 | case NAND_OP_CMD_INSTR: | |
1556 | if (first_cmd) | |
1557 | nfc_op->ndcb[0] |= | |
1558 | NDCB0_CMD1(instr->ctx.cmd.opcode); | |
1559 | else | |
1560 | nfc_op->ndcb[0] |= | |
1561 | NDCB0_CMD2(instr->ctx.cmd.opcode) | | |
1562 | NDCB0_DBC; | |
1563 | ||
1564 | nfc_op->cle_ale_delay_ns = instr->delay_ns; | |
1565 | first_cmd = false; | |
1566 | break; | |
1567 | ||
1568 | case NAND_OP_ADDR_INSTR: | |
1569 | offset = nand_subop_get_addr_start_off(subop, op_id); | |
1570 | naddrs = nand_subop_get_num_addr_cyc(subop, op_id); | |
1571 | addrs = &instr->ctx.addr.addrs[offset]; | |
1572 | ||
1573 | nfc_op->ndcb[0] |= NDCB0_ADDR_CYC(naddrs); | |
1574 | ||
1575 | for (i = 0; i < min_t(unsigned int, 4, naddrs); i++) | |
1576 | nfc_op->ndcb[1] |= addrs[i] << (8 * i); | |
1577 | ||
1578 | if (naddrs >= 5) | |
1579 | nfc_op->ndcb[2] |= NDCB2_ADDR5_CYC(addrs[4]); | |
1580 | if (naddrs >= 6) | |
1581 | nfc_op->ndcb[3] |= NDCB3_ADDR6_CYC(addrs[5]); | |
1582 | if (naddrs == 7) | |
1583 | nfc_op->ndcb[3] |= NDCB3_ADDR7_CYC(addrs[6]); | |
1584 | ||
1585 | nfc_op->cle_ale_delay_ns = instr->delay_ns; | |
1586 | break; | |
1587 | ||
1588 | case NAND_OP_DATA_IN_INSTR: | |
1589 | nfc_op->data_instr = instr; | |
1590 | nfc_op->data_instr_idx = op_id; | |
1591 | nfc_op->ndcb[0] |= NDCB0_CMD_TYPE(TYPE_READ); | |
1592 | if (nfc->caps->is_nfcv2) { | |
1593 | nfc_op->ndcb[0] |= | |
1594 | NDCB0_CMD_XTYPE(XTYPE_MONOLITHIC_RW) | | |
1595 | NDCB0_LEN_OVRD; | |
1596 | nfc_op->ndcb[3] |= round_up(len, FIFO_DEPTH); | |
1597 | } | |
1598 | nfc_op->data_delay_ns = instr->delay_ns; | |
1599 | break; | |
1600 | ||
1601 | case NAND_OP_DATA_OUT_INSTR: | |
1602 | nfc_op->data_instr = instr; | |
1603 | nfc_op->data_instr_idx = op_id; | |
1604 | nfc_op->ndcb[0] |= NDCB0_CMD_TYPE(TYPE_WRITE); | |
1605 | if (nfc->caps->is_nfcv2) { | |
1606 | nfc_op->ndcb[0] |= | |
1607 | NDCB0_CMD_XTYPE(XTYPE_MONOLITHIC_RW) | | |
1608 | NDCB0_LEN_OVRD; | |
1609 | nfc_op->ndcb[3] |= round_up(len, FIFO_DEPTH); | |
1610 | } | |
1611 | nfc_op->data_delay_ns = instr->delay_ns; | |
1612 | break; | |
1613 | ||
1614 | case NAND_OP_WAITRDY_INSTR: | |
1615 | nfc_op->rdy_timeout_ms = instr->ctx.waitrdy.timeout_ms; | |
1616 | nfc_op->rdy_delay_ns = instr->delay_ns; | |
1617 | break; | |
1618 | } | |
1619 | } | |
1620 | } | |
1621 | ||
1622 | static int marvell_nfc_xfer_data_pio(struct nand_chip *chip, | |
1623 | const struct nand_subop *subop, | |
1624 | struct marvell_nfc_op *nfc_op) | |
1625 | { | |
1626 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
1627 | const struct nand_op_instr *instr = nfc_op->data_instr; | |
1628 | unsigned int op_id = nfc_op->data_instr_idx; | |
1629 | unsigned int len = nand_subop_get_data_len(subop, op_id); | |
1630 | unsigned int offset = nand_subop_get_data_start_off(subop, op_id); | |
1631 | bool reading = (instr->type == NAND_OP_DATA_IN_INSTR); | |
1632 | int ret; | |
1633 | ||
1634 | if (instr->ctx.data.force_8bit) | |
1635 | marvell_nfc_force_byte_access(chip, true); | |
1636 | ||
1637 | if (reading) { | |
1638 | u8 *in = instr->ctx.data.buf.in + offset; | |
1639 | ||
1640 | ret = marvell_nfc_xfer_data_in_pio(nfc, in, len); | |
1641 | } else { | |
1642 | const u8 *out = instr->ctx.data.buf.out + offset; | |
1643 | ||
1644 | ret = marvell_nfc_xfer_data_out_pio(nfc, out, len); | |
1645 | } | |
1646 | ||
1647 | if (instr->ctx.data.force_8bit) | |
1648 | marvell_nfc_force_byte_access(chip, false); | |
1649 | ||
1650 | return ret; | |
1651 | } | |
1652 | ||
1653 | static int marvell_nfc_monolithic_access_exec(struct nand_chip *chip, | |
1654 | const struct nand_subop *subop) | |
1655 | { | |
1656 | struct marvell_nfc_op nfc_op; | |
1657 | bool reading; | |
1658 | int ret; | |
1659 | ||
1660 | marvell_nfc_parse_instructions(chip, subop, &nfc_op); | |
1661 | reading = (nfc_op.data_instr->type == NAND_OP_DATA_IN_INSTR); | |
1662 | ||
1663 | ret = marvell_nfc_prepare_cmd(chip); | |
1664 | if (ret) | |
1665 | return ret; | |
1666 | ||
1667 | marvell_nfc_send_cmd(chip, &nfc_op); | |
1668 | ret = marvell_nfc_end_cmd(chip, NDSR_RDDREQ | NDSR_WRDREQ, | |
1669 | "RDDREQ/WRDREQ while draining raw data"); | |
1670 | if (ret) | |
1671 | return ret; | |
1672 | ||
1673 | cond_delay(nfc_op.cle_ale_delay_ns); | |
1674 | ||
1675 | if (reading) { | |
1676 | if (nfc_op.rdy_timeout_ms) { | |
1677 | ret = marvell_nfc_wait_op(chip, nfc_op.rdy_timeout_ms); | |
1678 | if (ret) | |
1679 | return ret; | |
1680 | } | |
1681 | ||
1682 | cond_delay(nfc_op.rdy_delay_ns); | |
1683 | } | |
1684 | ||
1685 | marvell_nfc_xfer_data_pio(chip, subop, &nfc_op); | |
1686 | ret = marvell_nfc_wait_cmdd(chip); | |
1687 | if (ret) | |
1688 | return ret; | |
1689 | ||
1690 | cond_delay(nfc_op.data_delay_ns); | |
1691 | ||
1692 | if (!reading) { | |
1693 | if (nfc_op.rdy_timeout_ms) { | |
1694 | ret = marvell_nfc_wait_op(chip, nfc_op.rdy_timeout_ms); | |
1695 | if (ret) | |
1696 | return ret; | |
1697 | } | |
1698 | ||
1699 | cond_delay(nfc_op.rdy_delay_ns); | |
1700 | } | |
1701 | ||
1702 | /* | |
1703 | * NDCR ND_RUN bit should be cleared automatically at the end of each | |
1704 | * operation but experience shows that the behavior is buggy when it | |
1705 | * comes to writes (with LEN_OVRD). Clear it by hand in this case. | |
1706 | */ | |
1707 | if (!reading) { | |
1708 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
1709 | ||
1710 | writel_relaxed(readl(nfc->regs + NDCR) & ~NDCR_ND_RUN, | |
1711 | nfc->regs + NDCR); | |
1712 | } | |
1713 | ||
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | static int marvell_nfc_naked_access_exec(struct nand_chip *chip, | |
1718 | const struct nand_subop *subop) | |
1719 | { | |
1720 | struct marvell_nfc_op nfc_op; | |
1721 | int ret; | |
1722 | ||
1723 | marvell_nfc_parse_instructions(chip, subop, &nfc_op); | |
1724 | ||
1725 | /* | |
1726 | * Naked access are different in that they need to be flagged as naked | |
1727 | * by the controller. Reset the controller registers fields that inform | |
1728 | * on the type and refill them according to the ongoing operation. | |
1729 | */ | |
1730 | nfc_op.ndcb[0] &= ~(NDCB0_CMD_TYPE(TYPE_MASK) | | |
1731 | NDCB0_CMD_XTYPE(XTYPE_MASK)); | |
1732 | switch (subop->instrs[0].type) { | |
1733 | case NAND_OP_CMD_INSTR: | |
1734 | nfc_op.ndcb[0] |= NDCB0_CMD_TYPE(TYPE_NAKED_CMD); | |
1735 | break; | |
1736 | case NAND_OP_ADDR_INSTR: | |
1737 | nfc_op.ndcb[0] |= NDCB0_CMD_TYPE(TYPE_NAKED_ADDR); | |
1738 | break; | |
1739 | case NAND_OP_DATA_IN_INSTR: | |
1740 | nfc_op.ndcb[0] |= NDCB0_CMD_TYPE(TYPE_READ) | | |
1741 | NDCB0_CMD_XTYPE(XTYPE_LAST_NAKED_RW); | |
1742 | break; | |
1743 | case NAND_OP_DATA_OUT_INSTR: | |
1744 | nfc_op.ndcb[0] |= NDCB0_CMD_TYPE(TYPE_WRITE) | | |
1745 | NDCB0_CMD_XTYPE(XTYPE_LAST_NAKED_RW); | |
1746 | break; | |
1747 | default: | |
1748 | /* This should never happen */ | |
1749 | break; | |
1750 | } | |
1751 | ||
1752 | ret = marvell_nfc_prepare_cmd(chip); | |
1753 | if (ret) | |
1754 | return ret; | |
1755 | ||
1756 | marvell_nfc_send_cmd(chip, &nfc_op); | |
1757 | ||
1758 | if (!nfc_op.data_instr) { | |
1759 | ret = marvell_nfc_wait_cmdd(chip); | |
1760 | cond_delay(nfc_op.cle_ale_delay_ns); | |
1761 | return ret; | |
1762 | } | |
1763 | ||
1764 | ret = marvell_nfc_end_cmd(chip, NDSR_RDDREQ | NDSR_WRDREQ, | |
1765 | "RDDREQ/WRDREQ while draining raw data"); | |
1766 | if (ret) | |
1767 | return ret; | |
1768 | ||
1769 | marvell_nfc_xfer_data_pio(chip, subop, &nfc_op); | |
1770 | ret = marvell_nfc_wait_cmdd(chip); | |
1771 | if (ret) | |
1772 | return ret; | |
1773 | ||
1774 | /* | |
1775 | * NDCR ND_RUN bit should be cleared automatically at the end of each | |
1776 | * operation but experience shows that the behavior is buggy when it | |
1777 | * comes to writes (with LEN_OVRD). Clear it by hand in this case. | |
1778 | */ | |
1779 | if (subop->instrs[0].type == NAND_OP_DATA_OUT_INSTR) { | |
1780 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
1781 | ||
1782 | writel_relaxed(readl(nfc->regs + NDCR) & ~NDCR_ND_RUN, | |
1783 | nfc->regs + NDCR); | |
1784 | } | |
1785 | ||
1786 | return 0; | |
1787 | } | |
1788 | ||
1789 | static int marvell_nfc_naked_waitrdy_exec(struct nand_chip *chip, | |
1790 | const struct nand_subop *subop) | |
1791 | { | |
1792 | struct marvell_nfc_op nfc_op; | |
1793 | int ret; | |
1794 | ||
1795 | marvell_nfc_parse_instructions(chip, subop, &nfc_op); | |
1796 | ||
1797 | ret = marvell_nfc_wait_op(chip, nfc_op.rdy_timeout_ms); | |
1798 | cond_delay(nfc_op.rdy_delay_ns); | |
1799 | ||
1800 | return ret; | |
1801 | } | |
1802 | ||
1803 | static int marvell_nfc_read_id_type_exec(struct nand_chip *chip, | |
1804 | const struct nand_subop *subop) | |
1805 | { | |
1806 | struct marvell_nfc_op nfc_op; | |
1807 | int ret; | |
1808 | ||
1809 | marvell_nfc_parse_instructions(chip, subop, &nfc_op); | |
1810 | nfc_op.ndcb[0] &= ~NDCB0_CMD_TYPE(TYPE_READ); | |
1811 | nfc_op.ndcb[0] |= NDCB0_CMD_TYPE(TYPE_READ_ID); | |
1812 | ||
1813 | ret = marvell_nfc_prepare_cmd(chip); | |
1814 | if (ret) | |
1815 | return ret; | |
1816 | ||
1817 | marvell_nfc_send_cmd(chip, &nfc_op); | |
1818 | ret = marvell_nfc_end_cmd(chip, NDSR_RDDREQ, | |
1819 | "RDDREQ while reading ID"); | |
1820 | if (ret) | |
1821 | return ret; | |
1822 | ||
1823 | cond_delay(nfc_op.cle_ale_delay_ns); | |
1824 | ||
1825 | if (nfc_op.rdy_timeout_ms) { | |
1826 | ret = marvell_nfc_wait_op(chip, nfc_op.rdy_timeout_ms); | |
1827 | if (ret) | |
1828 | return ret; | |
1829 | } | |
1830 | ||
1831 | cond_delay(nfc_op.rdy_delay_ns); | |
1832 | ||
1833 | marvell_nfc_xfer_data_pio(chip, subop, &nfc_op); | |
1834 | ret = marvell_nfc_wait_cmdd(chip); | |
1835 | if (ret) | |
1836 | return ret; | |
1837 | ||
1838 | cond_delay(nfc_op.data_delay_ns); | |
1839 | ||
1840 | return 0; | |
1841 | } | |
1842 | ||
1843 | static int marvell_nfc_read_status_exec(struct nand_chip *chip, | |
1844 | const struct nand_subop *subop) | |
1845 | { | |
1846 | struct marvell_nfc_op nfc_op; | |
1847 | int ret; | |
1848 | ||
1849 | marvell_nfc_parse_instructions(chip, subop, &nfc_op); | |
1850 | nfc_op.ndcb[0] &= ~NDCB0_CMD_TYPE(TYPE_READ); | |
1851 | nfc_op.ndcb[0] |= NDCB0_CMD_TYPE(TYPE_STATUS); | |
1852 | ||
1853 | ret = marvell_nfc_prepare_cmd(chip); | |
1854 | if (ret) | |
1855 | return ret; | |
1856 | ||
1857 | marvell_nfc_send_cmd(chip, &nfc_op); | |
1858 | ret = marvell_nfc_end_cmd(chip, NDSR_RDDREQ, | |
1859 | "RDDREQ while reading status"); | |
1860 | if (ret) | |
1861 | return ret; | |
1862 | ||
1863 | cond_delay(nfc_op.cle_ale_delay_ns); | |
1864 | ||
1865 | if (nfc_op.rdy_timeout_ms) { | |
1866 | ret = marvell_nfc_wait_op(chip, nfc_op.rdy_timeout_ms); | |
1867 | if (ret) | |
1868 | return ret; | |
1869 | } | |
1870 | ||
1871 | cond_delay(nfc_op.rdy_delay_ns); | |
1872 | ||
1873 | marvell_nfc_xfer_data_pio(chip, subop, &nfc_op); | |
1874 | ret = marvell_nfc_wait_cmdd(chip); | |
1875 | if (ret) | |
1876 | return ret; | |
1877 | ||
1878 | cond_delay(nfc_op.data_delay_ns); | |
1879 | ||
1880 | return 0; | |
1881 | } | |
1882 | ||
1883 | static int marvell_nfc_reset_cmd_type_exec(struct nand_chip *chip, | |
1884 | const struct nand_subop *subop) | |
1885 | { | |
1886 | struct marvell_nfc_op nfc_op; | |
1887 | int ret; | |
1888 | ||
1889 | marvell_nfc_parse_instructions(chip, subop, &nfc_op); | |
1890 | nfc_op.ndcb[0] |= NDCB0_CMD_TYPE(TYPE_RESET); | |
1891 | ||
1892 | ret = marvell_nfc_prepare_cmd(chip); | |
1893 | if (ret) | |
1894 | return ret; | |
1895 | ||
1896 | marvell_nfc_send_cmd(chip, &nfc_op); | |
1897 | ret = marvell_nfc_wait_cmdd(chip); | |
1898 | if (ret) | |
1899 | return ret; | |
1900 | ||
1901 | cond_delay(nfc_op.cle_ale_delay_ns); | |
1902 | ||
1903 | ret = marvell_nfc_wait_op(chip, nfc_op.rdy_timeout_ms); | |
1904 | if (ret) | |
1905 | return ret; | |
1906 | ||
1907 | cond_delay(nfc_op.rdy_delay_ns); | |
1908 | ||
1909 | return 0; | |
1910 | } | |
1911 | ||
1912 | static int marvell_nfc_erase_cmd_type_exec(struct nand_chip *chip, | |
1913 | const struct nand_subop *subop) | |
1914 | { | |
1915 | struct marvell_nfc_op nfc_op; | |
1916 | int ret; | |
1917 | ||
1918 | marvell_nfc_parse_instructions(chip, subop, &nfc_op); | |
1919 | nfc_op.ndcb[0] |= NDCB0_CMD_TYPE(TYPE_ERASE); | |
1920 | ||
1921 | ret = marvell_nfc_prepare_cmd(chip); | |
1922 | if (ret) | |
1923 | return ret; | |
1924 | ||
1925 | marvell_nfc_send_cmd(chip, &nfc_op); | |
1926 | ret = marvell_nfc_wait_cmdd(chip); | |
1927 | if (ret) | |
1928 | return ret; | |
1929 | ||
1930 | cond_delay(nfc_op.cle_ale_delay_ns); | |
1931 | ||
1932 | ret = marvell_nfc_wait_op(chip, nfc_op.rdy_timeout_ms); | |
1933 | if (ret) | |
1934 | return ret; | |
1935 | ||
1936 | cond_delay(nfc_op.rdy_delay_ns); | |
1937 | ||
1938 | return 0; | |
1939 | } | |
1940 | ||
1941 | static const struct nand_op_parser marvell_nfcv2_op_parser = NAND_OP_PARSER( | |
1942 | /* Monolithic reads/writes */ | |
1943 | NAND_OP_PARSER_PATTERN( | |
1944 | marvell_nfc_monolithic_access_exec, | |
1945 | NAND_OP_PARSER_PAT_CMD_ELEM(false), | |
1946 | NAND_OP_PARSER_PAT_ADDR_ELEM(true, MAX_ADDRESS_CYC_NFCV2), | |
1947 | NAND_OP_PARSER_PAT_CMD_ELEM(true), | |
1948 | NAND_OP_PARSER_PAT_WAITRDY_ELEM(true), | |
1949 | NAND_OP_PARSER_PAT_DATA_IN_ELEM(false, MAX_CHUNK_SIZE)), | |
1950 | NAND_OP_PARSER_PATTERN( | |
1951 | marvell_nfc_monolithic_access_exec, | |
1952 | NAND_OP_PARSER_PAT_CMD_ELEM(false), | |
1953 | NAND_OP_PARSER_PAT_ADDR_ELEM(false, MAX_ADDRESS_CYC_NFCV2), | |
1954 | NAND_OP_PARSER_PAT_DATA_OUT_ELEM(false, MAX_CHUNK_SIZE), | |
1955 | NAND_OP_PARSER_PAT_CMD_ELEM(true), | |
1956 | NAND_OP_PARSER_PAT_WAITRDY_ELEM(true)), | |
1957 | /* Naked commands */ | |
1958 | NAND_OP_PARSER_PATTERN( | |
1959 | marvell_nfc_naked_access_exec, | |
1960 | NAND_OP_PARSER_PAT_CMD_ELEM(false)), | |
1961 | NAND_OP_PARSER_PATTERN( | |
1962 | marvell_nfc_naked_access_exec, | |
1963 | NAND_OP_PARSER_PAT_ADDR_ELEM(false, MAX_ADDRESS_CYC_NFCV2)), | |
1964 | NAND_OP_PARSER_PATTERN( | |
1965 | marvell_nfc_naked_access_exec, | |
1966 | NAND_OP_PARSER_PAT_DATA_IN_ELEM(false, MAX_CHUNK_SIZE)), | |
1967 | NAND_OP_PARSER_PATTERN( | |
1968 | marvell_nfc_naked_access_exec, | |
1969 | NAND_OP_PARSER_PAT_DATA_OUT_ELEM(false, MAX_CHUNK_SIZE)), | |
1970 | NAND_OP_PARSER_PATTERN( | |
1971 | marvell_nfc_naked_waitrdy_exec, | |
1972 | NAND_OP_PARSER_PAT_WAITRDY_ELEM(false)), | |
1973 | ); | |
1974 | ||
1975 | static const struct nand_op_parser marvell_nfcv1_op_parser = NAND_OP_PARSER( | |
1976 | /* Naked commands not supported, use a function for each pattern */ | |
1977 | NAND_OP_PARSER_PATTERN( | |
1978 | marvell_nfc_read_id_type_exec, | |
1979 | NAND_OP_PARSER_PAT_CMD_ELEM(false), | |
1980 | NAND_OP_PARSER_PAT_ADDR_ELEM(false, MAX_ADDRESS_CYC_NFCV1), | |
1981 | NAND_OP_PARSER_PAT_DATA_IN_ELEM(false, 8)), | |
1982 | NAND_OP_PARSER_PATTERN( | |
1983 | marvell_nfc_erase_cmd_type_exec, | |
1984 | NAND_OP_PARSER_PAT_CMD_ELEM(false), | |
1985 | NAND_OP_PARSER_PAT_ADDR_ELEM(false, MAX_ADDRESS_CYC_NFCV1), | |
1986 | NAND_OP_PARSER_PAT_CMD_ELEM(false), | |
1987 | NAND_OP_PARSER_PAT_WAITRDY_ELEM(false)), | |
1988 | NAND_OP_PARSER_PATTERN( | |
1989 | marvell_nfc_read_status_exec, | |
1990 | NAND_OP_PARSER_PAT_CMD_ELEM(false), | |
1991 | NAND_OP_PARSER_PAT_DATA_IN_ELEM(false, 1)), | |
1992 | NAND_OP_PARSER_PATTERN( | |
1993 | marvell_nfc_reset_cmd_type_exec, | |
1994 | NAND_OP_PARSER_PAT_CMD_ELEM(false), | |
1995 | NAND_OP_PARSER_PAT_WAITRDY_ELEM(false)), | |
1996 | NAND_OP_PARSER_PATTERN( | |
1997 | marvell_nfc_naked_waitrdy_exec, | |
1998 | NAND_OP_PARSER_PAT_WAITRDY_ELEM(false)), | |
1999 | ); | |
2000 | ||
2001 | static int marvell_nfc_exec_op(struct nand_chip *chip, | |
2002 | const struct nand_operation *op, | |
2003 | bool check_only) | |
2004 | { | |
2005 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
2006 | ||
2007 | if (nfc->caps->is_nfcv2) | |
2008 | return nand_op_parser_exec_op(chip, &marvell_nfcv2_op_parser, | |
2009 | op, check_only); | |
2010 | else | |
2011 | return nand_op_parser_exec_op(chip, &marvell_nfcv1_op_parser, | |
2012 | op, check_only); | |
2013 | } | |
2014 | ||
2015 | /* | |
2016 | * Layouts were broken in old pxa3xx_nand driver, these are supposed to be | |
2017 | * usable. | |
2018 | */ | |
2019 | static int marvell_nand_ooblayout_ecc(struct mtd_info *mtd, int section, | |
2020 | struct mtd_oob_region *oobregion) | |
2021 | { | |
2022 | struct nand_chip *chip = mtd_to_nand(mtd); | |
2023 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
2024 | ||
2025 | if (section) | |
2026 | return -ERANGE; | |
2027 | ||
2028 | oobregion->length = (lt->full_chunk_cnt * lt->ecc_bytes) + | |
2029 | lt->last_ecc_bytes; | |
2030 | oobregion->offset = mtd->oobsize - oobregion->length; | |
2031 | ||
2032 | return 0; | |
2033 | } | |
2034 | ||
2035 | static int marvell_nand_ooblayout_free(struct mtd_info *mtd, int section, | |
2036 | struct mtd_oob_region *oobregion) | |
2037 | { | |
2038 | struct nand_chip *chip = mtd_to_nand(mtd); | |
2039 | const struct marvell_hw_ecc_layout *lt = to_marvell_nand(chip)->layout; | |
2040 | ||
2041 | if (section) | |
2042 | return -ERANGE; | |
2043 | ||
2044 | /* | |
2045 | * Bootrom looks in bytes 0 & 5 for bad blocks for the | |
2046 | * 4KB page / 4bit BCH combination. | |
2047 | */ | |
2048 | if (mtd->writesize == SZ_4K && lt->data_bytes == SZ_2K) | |
2049 | oobregion->offset = 6; | |
2050 | else | |
2051 | oobregion->offset = 2; | |
2052 | ||
2053 | oobregion->length = (lt->full_chunk_cnt * lt->spare_bytes) + | |
2054 | lt->last_spare_bytes - oobregion->offset; | |
2055 | ||
2056 | return 0; | |
2057 | } | |
2058 | ||
2059 | static const struct mtd_ooblayout_ops marvell_nand_ooblayout_ops = { | |
2060 | .ecc = marvell_nand_ooblayout_ecc, | |
2061 | .free = marvell_nand_ooblayout_free, | |
2062 | }; | |
2063 | ||
2064 | static int marvell_nand_hw_ecc_ctrl_init(struct mtd_info *mtd, | |
2065 | struct nand_ecc_ctrl *ecc) | |
2066 | { | |
2067 | struct nand_chip *chip = mtd_to_nand(mtd); | |
2068 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
2069 | const struct marvell_hw_ecc_layout *l; | |
2070 | int i; | |
2071 | ||
2072 | if (!nfc->caps->is_nfcv2 && | |
2073 | (mtd->writesize + mtd->oobsize > MAX_CHUNK_SIZE)) { | |
2074 | dev_err(nfc->dev, | |
2075 | "NFCv1: writesize (%d) cannot be bigger than a chunk (%d)\n", | |
2076 | mtd->writesize, MAX_CHUNK_SIZE - mtd->oobsize); | |
2077 | return -ENOTSUPP; | |
2078 | } | |
2079 | ||
2080 | to_marvell_nand(chip)->layout = NULL; | |
2081 | for (i = 0; i < ARRAY_SIZE(marvell_nfc_layouts); i++) { | |
2082 | l = &marvell_nfc_layouts[i]; | |
2083 | if (mtd->writesize == l->writesize && | |
2084 | ecc->size == l->chunk && ecc->strength == l->strength) { | |
2085 | to_marvell_nand(chip)->layout = l; | |
2086 | break; | |
2087 | } | |
2088 | } | |
2089 | ||
2090 | if (!to_marvell_nand(chip)->layout || | |
2091 | (!nfc->caps->is_nfcv2 && ecc->strength > 1)) { | |
2092 | dev_err(nfc->dev, | |
2093 | "ECC strength %d at page size %d is not supported\n", | |
2094 | ecc->strength, mtd->writesize); | |
2095 | return -ENOTSUPP; | |
2096 | } | |
2097 | ||
2098 | mtd_set_ooblayout(mtd, &marvell_nand_ooblayout_ops); | |
2099 | ecc->steps = l->nchunks; | |
2100 | ecc->size = l->data_bytes; | |
2101 | ||
2102 | if (ecc->strength == 1) { | |
2103 | chip->ecc.algo = NAND_ECC_HAMMING; | |
2104 | ecc->read_page_raw = marvell_nfc_hw_ecc_hmg_read_page_raw; | |
2105 | ecc->read_page = marvell_nfc_hw_ecc_hmg_read_page; | |
2106 | ecc->read_oob_raw = marvell_nfc_hw_ecc_hmg_read_oob_raw; | |
2107 | ecc->read_oob = ecc->read_oob_raw; | |
2108 | ecc->write_page_raw = marvell_nfc_hw_ecc_hmg_write_page_raw; | |
2109 | ecc->write_page = marvell_nfc_hw_ecc_hmg_write_page; | |
2110 | ecc->write_oob_raw = marvell_nfc_hw_ecc_hmg_write_oob_raw; | |
2111 | ecc->write_oob = ecc->write_oob_raw; | |
2112 | } else { | |
2113 | chip->ecc.algo = NAND_ECC_BCH; | |
2114 | ecc->strength = 16; | |
2115 | ecc->read_page_raw = marvell_nfc_hw_ecc_bch_read_page_raw; | |
2116 | ecc->read_page = marvell_nfc_hw_ecc_bch_read_page; | |
2117 | ecc->read_oob_raw = marvell_nfc_hw_ecc_bch_read_oob_raw; | |
2118 | ecc->read_oob = marvell_nfc_hw_ecc_bch_read_oob; | |
2119 | ecc->write_page_raw = marvell_nfc_hw_ecc_bch_write_page_raw; | |
2120 | ecc->write_page = marvell_nfc_hw_ecc_bch_write_page; | |
2121 | ecc->write_oob_raw = marvell_nfc_hw_ecc_bch_write_oob_raw; | |
2122 | ecc->write_oob = marvell_nfc_hw_ecc_bch_write_oob; | |
2123 | } | |
2124 | ||
2125 | return 0; | |
2126 | } | |
2127 | ||
2128 | static int marvell_nand_ecc_init(struct mtd_info *mtd, | |
2129 | struct nand_ecc_ctrl *ecc) | |
2130 | { | |
2131 | struct nand_chip *chip = mtd_to_nand(mtd); | |
2132 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
2133 | int ret; | |
2134 | ||
2135 | if (ecc->mode != NAND_ECC_NONE && (!ecc->size || !ecc->strength)) { | |
2136 | if (chip->ecc_step_ds && chip->ecc_strength_ds) { | |
2137 | ecc->size = chip->ecc_step_ds; | |
2138 | ecc->strength = chip->ecc_strength_ds; | |
2139 | } else { | |
2140 | dev_info(nfc->dev, | |
2141 | "No minimum ECC strength, using 1b/512B\n"); | |
2142 | ecc->size = 512; | |
2143 | ecc->strength = 1; | |
2144 | } | |
2145 | } | |
2146 | ||
2147 | switch (ecc->mode) { | |
2148 | case NAND_ECC_HW: | |
2149 | ret = marvell_nand_hw_ecc_ctrl_init(mtd, ecc); | |
2150 | if (ret) | |
2151 | return ret; | |
2152 | break; | |
2153 | case NAND_ECC_NONE: | |
2154 | case NAND_ECC_SOFT: | |
ed6d0285 | 2155 | case NAND_ECC_ON_DIE: |
02f26ecf MR |
2156 | if (!nfc->caps->is_nfcv2 && mtd->writesize != SZ_512 && |
2157 | mtd->writesize != SZ_2K) { | |
2158 | dev_err(nfc->dev, "NFCv1 cannot write %d bytes pages\n", | |
2159 | mtd->writesize); | |
2160 | return -EINVAL; | |
2161 | } | |
2162 | break; | |
2163 | default: | |
2164 | return -EINVAL; | |
2165 | } | |
2166 | ||
2167 | return 0; | |
2168 | } | |
2169 | ||
2170 | static u8 bbt_pattern[] = {'M', 'V', 'B', 'b', 't', '0' }; | |
2171 | static u8 bbt_mirror_pattern[] = {'1', 't', 'b', 'B', 'V', 'M' }; | |
2172 | ||
2173 | static struct nand_bbt_descr bbt_main_descr = { | |
2174 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | | |
2175 | NAND_BBT_2BIT | NAND_BBT_VERSION, | |
2176 | .offs = 8, | |
2177 | .len = 6, | |
2178 | .veroffs = 14, | |
2179 | .maxblocks = 8, /* Last 8 blocks in each chip */ | |
2180 | .pattern = bbt_pattern | |
2181 | }; | |
2182 | ||
2183 | static struct nand_bbt_descr bbt_mirror_descr = { | |
2184 | .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | | |
2185 | NAND_BBT_2BIT | NAND_BBT_VERSION, | |
2186 | .offs = 8, | |
2187 | .len = 6, | |
2188 | .veroffs = 14, | |
2189 | .maxblocks = 8, /* Last 8 blocks in each chip */ | |
2190 | .pattern = bbt_mirror_pattern | |
2191 | }; | |
2192 | ||
2193 | static int marvell_nfc_setup_data_interface(struct mtd_info *mtd, int chipnr, | |
2194 | const struct nand_data_interface | |
2195 | *conf) | |
2196 | { | |
2197 | struct nand_chip *chip = mtd_to_nand(mtd); | |
2198 | struct marvell_nand_chip *marvell_nand = to_marvell_nand(chip); | |
2199 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
6b6de654 | 2200 | unsigned int period_ns = 1000000000 / clk_get_rate(nfc->core_clk) * 2; |
02f26ecf MR |
2201 | const struct nand_sdr_timings *sdr; |
2202 | struct marvell_nfc_timings nfc_tmg; | |
2203 | int read_delay; | |
2204 | ||
2205 | sdr = nand_get_sdr_timings(conf); | |
2206 | if (IS_ERR(sdr)) | |
2207 | return PTR_ERR(sdr); | |
2208 | ||
2209 | /* | |
2210 | * SDR timings are given in pico-seconds while NFC timings must be | |
2211 | * expressed in NAND controller clock cycles, which is half of the | |
2212 | * frequency of the accessible ECC clock retrieved by clk_get_rate(). | |
2213 | * This is not written anywhere in the datasheet but was observed | |
2214 | * with an oscilloscope. | |
2215 | * | |
2216 | * NFC datasheet gives equations from which thoses calculations | |
2217 | * are derived, they tend to be slightly more restrictives than the | |
2218 | * given core timings and may improve the overall speed. | |
2219 | */ | |
2220 | nfc_tmg.tRP = TO_CYCLES(DIV_ROUND_UP(sdr->tRC_min, 2), period_ns) - 1; | |
2221 | nfc_tmg.tRH = nfc_tmg.tRP; | |
2222 | nfc_tmg.tWP = TO_CYCLES(DIV_ROUND_UP(sdr->tWC_min, 2), period_ns) - 1; | |
2223 | nfc_tmg.tWH = nfc_tmg.tWP; | |
2224 | nfc_tmg.tCS = TO_CYCLES(sdr->tCS_min, period_ns); | |
2225 | nfc_tmg.tCH = TO_CYCLES(sdr->tCH_min, period_ns) - 1; | |
2226 | nfc_tmg.tADL = TO_CYCLES(sdr->tADL_min, period_ns); | |
2227 | /* | |
2228 | * Read delay is the time of propagation from SoC pins to NFC internal | |
2229 | * logic. With non-EDO timings, this is MIN_RD_DEL_CNT clock cycles. In | |
2230 | * EDO mode, an additional delay of tRH must be taken into account so | |
2231 | * the data is sampled on the falling edge instead of the rising edge. | |
2232 | */ | |
2233 | read_delay = sdr->tRC_min >= 30000 ? | |
2234 | MIN_RD_DEL_CNT : MIN_RD_DEL_CNT + nfc_tmg.tRH; | |
2235 | ||
2236 | nfc_tmg.tAR = TO_CYCLES(sdr->tAR_min, period_ns); | |
2237 | /* | |
2238 | * tWHR and tRHW are supposed to be read to write delays (and vice | |
2239 | * versa) but in some cases, ie. when doing a change column, they must | |
2240 | * be greater than that to be sure tCCS delay is respected. | |
2241 | */ | |
2242 | nfc_tmg.tWHR = TO_CYCLES(max_t(int, sdr->tWHR_min, sdr->tCCS_min), | |
2243 | period_ns) - 2, | |
2244 | nfc_tmg.tRHW = TO_CYCLES(max_t(int, sdr->tRHW_min, sdr->tCCS_min), | |
2245 | period_ns); | |
2246 | ||
07ad5a72 MR |
2247 | /* |
2248 | * NFCv2: Use WAIT_MODE (wait for RB line), do not rely only on delays. | |
2249 | * NFCv1: No WAIT_MODE, tR must be maximal. | |
2250 | */ | |
2251 | if (nfc->caps->is_nfcv2) { | |
2252 | nfc_tmg.tR = TO_CYCLES(sdr->tWB_max, period_ns); | |
2253 | } else { | |
2254 | nfc_tmg.tR = TO_CYCLES64(sdr->tWB_max + sdr->tR_max, | |
2255 | period_ns); | |
2256 | if (nfc_tmg.tR + 3 > nfc_tmg.tCH) | |
2257 | nfc_tmg.tR = nfc_tmg.tCH - 3; | |
2258 | else | |
2259 | nfc_tmg.tR = 0; | |
2260 | } | |
02f26ecf MR |
2261 | |
2262 | if (chipnr < 0) | |
2263 | return 0; | |
2264 | ||
2265 | marvell_nand->ndtr0 = | |
2266 | NDTR0_TRP(nfc_tmg.tRP) | | |
2267 | NDTR0_TRH(nfc_tmg.tRH) | | |
2268 | NDTR0_ETRP(nfc_tmg.tRP) | | |
2269 | NDTR0_TWP(nfc_tmg.tWP) | | |
2270 | NDTR0_TWH(nfc_tmg.tWH) | | |
2271 | NDTR0_TCS(nfc_tmg.tCS) | | |
07ad5a72 | 2272 | NDTR0_TCH(nfc_tmg.tCH); |
02f26ecf MR |
2273 | |
2274 | marvell_nand->ndtr1 = | |
2275 | NDTR1_TAR(nfc_tmg.tAR) | | |
2276 | NDTR1_TWHR(nfc_tmg.tWHR) | | |
02f26ecf MR |
2277 | NDTR1_TR(nfc_tmg.tR); |
2278 | ||
07ad5a72 MR |
2279 | if (nfc->caps->is_nfcv2) { |
2280 | marvell_nand->ndtr0 |= | |
2281 | NDTR0_RD_CNT_DEL(read_delay) | | |
2282 | NDTR0_SELCNTR | | |
2283 | NDTR0_TADL(nfc_tmg.tADL); | |
2284 | ||
2285 | marvell_nand->ndtr1 |= | |
2286 | NDTR1_TRHW(nfc_tmg.tRHW) | | |
2287 | NDTR1_WAIT_MODE; | |
2288 | } | |
2289 | ||
02f26ecf MR |
2290 | return 0; |
2291 | } | |
2292 | ||
8831e48b MR |
2293 | static int marvell_nand_attach_chip(struct nand_chip *chip) |
2294 | { | |
2295 | struct mtd_info *mtd = nand_to_mtd(chip); | |
2296 | struct marvell_nand_chip *marvell_nand = to_marvell_nand(chip); | |
2297 | struct marvell_nfc *nfc = to_marvell_nfc(chip->controller); | |
2298 | struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(nfc->dev); | |
2299 | int ret; | |
2300 | ||
2301 | if (pdata && pdata->flash_bbt) | |
2302 | chip->bbt_options |= NAND_BBT_USE_FLASH; | |
2303 | ||
2304 | if (chip->bbt_options & NAND_BBT_USE_FLASH) { | |
2305 | /* | |
2306 | * We'll use a bad block table stored in-flash and don't | |
2307 | * allow writing the bad block marker to the flash. | |
2308 | */ | |
2309 | chip->bbt_options |= NAND_BBT_NO_OOB_BBM; | |
2310 | chip->bbt_td = &bbt_main_descr; | |
2311 | chip->bbt_md = &bbt_mirror_descr; | |
2312 | } | |
2313 | ||
2314 | /* Save the chip-specific fields of NDCR */ | |
2315 | marvell_nand->ndcr = NDCR_PAGE_SZ(mtd->writesize); | |
2316 | if (chip->options & NAND_BUSWIDTH_16) | |
2317 | marvell_nand->ndcr |= NDCR_DWIDTH_M | NDCR_DWIDTH_C; | |
2318 | ||
2319 | /* | |
2320 | * On small page NANDs, only one cycle is needed to pass the | |
2321 | * column address. | |
2322 | */ | |
2323 | if (mtd->writesize <= 512) { | |
2324 | marvell_nand->addr_cyc = 1; | |
2325 | } else { | |
2326 | marvell_nand->addr_cyc = 2; | |
2327 | marvell_nand->ndcr |= NDCR_RA_START; | |
2328 | } | |
2329 | ||
2330 | /* | |
2331 | * Now add the number of cycles needed to pass the row | |
2332 | * address. | |
2333 | * | |
2334 | * Addressing a chip using CS 2 or 3 should also need the third row | |
2335 | * cycle but due to inconsistance in the documentation and lack of | |
2336 | * hardware to test this situation, this case is not supported. | |
2337 | */ | |
2338 | if (chip->options & NAND_ROW_ADDR_3) | |
2339 | marvell_nand->addr_cyc += 3; | |
2340 | else | |
2341 | marvell_nand->addr_cyc += 2; | |
2342 | ||
2343 | if (pdata) { | |
2344 | chip->ecc.size = pdata->ecc_step_size; | |
2345 | chip->ecc.strength = pdata->ecc_strength; | |
2346 | } | |
2347 | ||
2348 | ret = marvell_nand_ecc_init(mtd, &chip->ecc); | |
2349 | if (ret) { | |
2350 | dev_err(nfc->dev, "ECC init failed: %d\n", ret); | |
2351 | return ret; | |
2352 | } | |
2353 | ||
2354 | if (chip->ecc.mode == NAND_ECC_HW) { | |
2355 | /* | |
2356 | * Subpage write not available with hardware ECC, prohibit also | |
2357 | * subpage read as in userspace subpage access would still be | |
2358 | * allowed and subpage write, if used, would lead to numerous | |
2359 | * uncorrectable ECC errors. | |
2360 | */ | |
2361 | chip->options |= NAND_NO_SUBPAGE_WRITE; | |
2362 | } | |
2363 | ||
2364 | if (pdata || nfc->caps->legacy_of_bindings) { | |
2365 | /* | |
2366 | * We keep the MTD name unchanged to avoid breaking platforms | |
2367 | * where the MTD cmdline parser is used and the bootloader | |
2368 | * has not been updated to use the new naming scheme. | |
2369 | */ | |
2370 | mtd->name = "pxa3xx_nand-0"; | |
2371 | } else if (!mtd->name) { | |
2372 | /* | |
2373 | * If the new bindings are used and the bootloader has not been | |
2374 | * updated to pass a new mtdparts parameter on the cmdline, you | |
2375 | * should define the following property in your NAND node, ie: | |
2376 | * | |
2377 | * label = "main-storage"; | |
2378 | * | |
2379 | * This way, mtd->name will be set by the core when | |
2380 | * nand_set_flash_node() is called. | |
2381 | */ | |
2382 | mtd->name = devm_kasprintf(nfc->dev, GFP_KERNEL, | |
2383 | "%s:nand.%d", dev_name(nfc->dev), | |
2384 | marvell_nand->sels[0].cs); | |
2385 | if (!mtd->name) { | |
2386 | dev_err(nfc->dev, "Failed to allocate mtd->name\n"); | |
2387 | return -ENOMEM; | |
2388 | } | |
2389 | } | |
2390 | ||
2391 | return 0; | |
2392 | } | |
2393 | ||
2394 | static const struct nand_controller_ops marvell_nand_controller_ops = { | |
2395 | .attach_chip = marvell_nand_attach_chip, | |
2396 | }; | |
2397 | ||
02f26ecf MR |
2398 | static int marvell_nand_chip_init(struct device *dev, struct marvell_nfc *nfc, |
2399 | struct device_node *np) | |
2400 | { | |
2401 | struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(dev); | |
2402 | struct marvell_nand_chip *marvell_nand; | |
2403 | struct mtd_info *mtd; | |
2404 | struct nand_chip *chip; | |
2405 | int nsels, ret, i; | |
2406 | u32 cs, rb; | |
2407 | ||
2408 | /* | |
2409 | * The legacy "num-cs" property indicates the number of CS on the only | |
2410 | * chip connected to the controller (legacy bindings does not support | |
f6997bec | 2411 | * more than one chip). The CS and RB pins are always the #0. |
02f26ecf MR |
2412 | * |
2413 | * When not using legacy bindings, a couple of "reg" and "nand-rb" | |
2414 | * properties must be filled. For each chip, expressed as a subnode, | |
2415 | * "reg" points to the CS lines and "nand-rb" to the RB line. | |
2416 | */ | |
f6997bec | 2417 | if (pdata || nfc->caps->legacy_of_bindings) { |
02f26ecf | 2418 | nsels = 1; |
f6997bec MR |
2419 | } else { |
2420 | nsels = of_property_count_elems_of_size(np, "reg", sizeof(u32)); | |
2421 | if (nsels <= 0) { | |
2422 | dev_err(dev, "missing/invalid reg property\n"); | |
2423 | return -EINVAL; | |
2424 | } | |
02f26ecf MR |
2425 | } |
2426 | ||
2427 | /* Alloc the nand chip structure */ | |
2428 | marvell_nand = devm_kzalloc(dev, sizeof(*marvell_nand) + | |
2429 | (nsels * | |
2430 | sizeof(struct marvell_nand_chip_sel)), | |
2431 | GFP_KERNEL); | |
2432 | if (!marvell_nand) { | |
2433 | dev_err(dev, "could not allocate chip structure\n"); | |
2434 | return -ENOMEM; | |
2435 | } | |
2436 | ||
2437 | marvell_nand->nsels = nsels; | |
2438 | marvell_nand->selected_die = -1; | |
2439 | ||
2440 | for (i = 0; i < nsels; i++) { | |
2441 | if (pdata || nfc->caps->legacy_of_bindings) { | |
2442 | /* | |
2443 | * Legacy bindings use the CS lines in natural | |
2444 | * order (0, 1, ...) | |
2445 | */ | |
2446 | cs = i; | |
2447 | } else { | |
2448 | /* Retrieve CS id */ | |
2449 | ret = of_property_read_u32_index(np, "reg", i, &cs); | |
2450 | if (ret) { | |
2451 | dev_err(dev, "could not retrieve reg property: %d\n", | |
2452 | ret); | |
2453 | return ret; | |
2454 | } | |
2455 | } | |
2456 | ||
2457 | if (cs >= nfc->caps->max_cs_nb) { | |
2458 | dev_err(dev, "invalid reg value: %u (max CS = %d)\n", | |
2459 | cs, nfc->caps->max_cs_nb); | |
2460 | return -EINVAL; | |
2461 | } | |
2462 | ||
2463 | if (test_and_set_bit(cs, &nfc->assigned_cs)) { | |
2464 | dev_err(dev, "CS %d already assigned\n", cs); | |
2465 | return -EINVAL; | |
2466 | } | |
2467 | ||
2468 | /* | |
2469 | * The cs variable represents the chip select id, which must be | |
2470 | * converted in bit fields for NDCB0 and NDCB2 to select the | |
2471 | * right chip. Unfortunately, due to a lack of information on | |
2472 | * the subject and incoherent documentation, the user should not | |
2473 | * use CS1 and CS3 at all as asserting them is not supported in | |
2474 | * a reliable way (due to multiplexing inside ADDR5 field). | |
2475 | */ | |
2476 | marvell_nand->sels[i].cs = cs; | |
2477 | switch (cs) { | |
2478 | case 0: | |
2479 | case 2: | |
2480 | marvell_nand->sels[i].ndcb0_csel = 0; | |
2481 | break; | |
2482 | case 1: | |
2483 | case 3: | |
2484 | marvell_nand->sels[i].ndcb0_csel = NDCB0_CSEL; | |
2485 | break; | |
2486 | default: | |
2487 | return -EINVAL; | |
2488 | } | |
2489 | ||
2490 | /* Retrieve RB id */ | |
2491 | if (pdata || nfc->caps->legacy_of_bindings) { | |
2492 | /* Legacy bindings always use RB #0 */ | |
2493 | rb = 0; | |
2494 | } else { | |
2495 | ret = of_property_read_u32_index(np, "nand-rb", i, | |
2496 | &rb); | |
2497 | if (ret) { | |
2498 | dev_err(dev, | |
2499 | "could not retrieve RB property: %d\n", | |
2500 | ret); | |
2501 | return ret; | |
2502 | } | |
2503 | } | |
2504 | ||
2505 | if (rb >= nfc->caps->max_rb_nb) { | |
2506 | dev_err(dev, "invalid reg value: %u (max RB = %d)\n", | |
2507 | rb, nfc->caps->max_rb_nb); | |
2508 | return -EINVAL; | |
2509 | } | |
2510 | ||
2511 | marvell_nand->sels[i].rb = rb; | |
2512 | } | |
2513 | ||
2514 | chip = &marvell_nand->chip; | |
2515 | chip->controller = &nfc->controller; | |
2516 | nand_set_flash_node(chip, np); | |
2517 | ||
2518 | chip->exec_op = marvell_nfc_exec_op; | |
2519 | chip->select_chip = marvell_nfc_select_chip; | |
07ad5a72 | 2520 | if (!of_property_read_bool(np, "marvell,nand-keep-config")) |
02f26ecf MR |
2521 | chip->setup_data_interface = marvell_nfc_setup_data_interface; |
2522 | ||
2523 | mtd = nand_to_mtd(chip); | |
2524 | mtd->dev.parent = dev; | |
2525 | ||
2526 | /* | |
2527 | * Default to HW ECC engine mode. If the nand-ecc-mode property is given | |
2528 | * in the DT node, this entry will be overwritten in nand_scan_ident(). | |
2529 | */ | |
2530 | chip->ecc.mode = NAND_ECC_HW; | |
2531 | ||
2532 | /* | |
2533 | * Save a reference value for timing registers before | |
2534 | * ->setup_data_interface() is called. | |
2535 | */ | |
2536 | marvell_nand->ndtr0 = readl_relaxed(nfc->regs + NDTR0); | |
2537 | marvell_nand->ndtr1 = readl_relaxed(nfc->regs + NDTR1); | |
2538 | ||
2539 | chip->options |= NAND_BUSWIDTH_AUTO; | |
02f26ecf | 2540 | |
8831e48b | 2541 | ret = nand_scan(mtd, marvell_nand->nsels); |
02f26ecf | 2542 | if (ret) { |
8831e48b | 2543 | dev_err(dev, "could not scan the nand chip\n"); |
02f26ecf MR |
2544 | return ret; |
2545 | } | |
2546 | ||
2547 | if (pdata) | |
2548 | /* Legacy bindings support only one chip */ | |
7576594c | 2549 | ret = mtd_device_register(mtd, pdata->parts, pdata->nr_parts); |
02f26ecf MR |
2550 | else |
2551 | ret = mtd_device_register(mtd, NULL, 0); | |
2552 | if (ret) { | |
2553 | dev_err(dev, "failed to register mtd device: %d\n", ret); | |
2554 | nand_release(mtd); | |
2555 | return ret; | |
2556 | } | |
2557 | ||
2558 | list_add_tail(&marvell_nand->node, &nfc->chips); | |
2559 | ||
2560 | return 0; | |
2561 | } | |
2562 | ||
2563 | static int marvell_nand_chips_init(struct device *dev, struct marvell_nfc *nfc) | |
2564 | { | |
2565 | struct device_node *np = dev->of_node; | |
2566 | struct device_node *nand_np; | |
2567 | int max_cs = nfc->caps->max_cs_nb; | |
2568 | int nchips; | |
2569 | int ret; | |
2570 | ||
2571 | if (!np) | |
2572 | nchips = 1; | |
2573 | else | |
2574 | nchips = of_get_child_count(np); | |
2575 | ||
2576 | if (nchips > max_cs) { | |
2577 | dev_err(dev, "too many NAND chips: %d (max = %d CS)\n", nchips, | |
2578 | max_cs); | |
2579 | return -EINVAL; | |
2580 | } | |
2581 | ||
2582 | /* | |
2583 | * Legacy bindings do not use child nodes to exhibit NAND chip | |
2584 | * properties and layout. Instead, NAND properties are mixed with the | |
2585 | * controller ones, and partitions are defined as direct subnodes of the | |
2586 | * NAND controller node. | |
2587 | */ | |
2588 | if (nfc->caps->legacy_of_bindings) { | |
2589 | ret = marvell_nand_chip_init(dev, nfc, np); | |
2590 | return ret; | |
2591 | } | |
2592 | ||
2593 | for_each_child_of_node(np, nand_np) { | |
2594 | ret = marvell_nand_chip_init(dev, nfc, nand_np); | |
2595 | if (ret) { | |
2596 | of_node_put(nand_np); | |
2597 | return ret; | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | return 0; | |
2602 | } | |
2603 | ||
2604 | static void marvell_nand_chips_cleanup(struct marvell_nfc *nfc) | |
2605 | { | |
2606 | struct marvell_nand_chip *entry, *temp; | |
2607 | ||
2608 | list_for_each_entry_safe(entry, temp, &nfc->chips, node) { | |
2609 | nand_release(nand_to_mtd(&entry->chip)); | |
2610 | list_del(&entry->node); | |
2611 | } | |
2612 | } | |
2613 | ||
2614 | static int marvell_nfc_init_dma(struct marvell_nfc *nfc) | |
2615 | { | |
2616 | struct platform_device *pdev = container_of(nfc->dev, | |
2617 | struct platform_device, | |
2618 | dev); | |
2619 | struct dma_slave_config config = {}; | |
2620 | struct resource *r; | |
02f26ecf MR |
2621 | int ret; |
2622 | ||
2623 | if (!IS_ENABLED(CONFIG_PXA_DMA)) { | |
2624 | dev_warn(nfc->dev, | |
2625 | "DMA not enabled in configuration\n"); | |
2626 | return -ENOTSUPP; | |
2627 | } | |
2628 | ||
2629 | ret = dma_set_mask_and_coherent(nfc->dev, DMA_BIT_MASK(32)); | |
2630 | if (ret) | |
2631 | return ret; | |
2632 | ||
ac75a50b | 2633 | nfc->dma_chan = dma_request_slave_channel(nfc->dev, "data"); |
02f26ecf MR |
2634 | if (!nfc->dma_chan) { |
2635 | dev_err(nfc->dev, | |
2636 | "Unable to request data DMA channel\n"); | |
2637 | return -ENODEV; | |
2638 | } | |
2639 | ||
2640 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2641 | if (!r) | |
2642 | return -ENXIO; | |
2643 | ||
2644 | config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
2645 | config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
2646 | config.src_addr = r->start + NDDB; | |
2647 | config.dst_addr = r->start + NDDB; | |
2648 | config.src_maxburst = 32; | |
2649 | config.dst_maxburst = 32; | |
2650 | ret = dmaengine_slave_config(nfc->dma_chan, &config); | |
2651 | if (ret < 0) { | |
2652 | dev_err(nfc->dev, "Failed to configure DMA channel\n"); | |
2653 | return ret; | |
2654 | } | |
2655 | ||
2656 | /* | |
2657 | * DMA must act on length multiple of 32 and this length may be | |
2658 | * bigger than the destination buffer. Use this buffer instead | |
2659 | * for DMA transfers and then copy the desired amount of data to | |
2660 | * the provided buffer. | |
2661 | */ | |
c495a927 | 2662 | nfc->dma_buf = kmalloc(MAX_CHUNK_SIZE, GFP_KERNEL | GFP_DMA); |
02f26ecf MR |
2663 | if (!nfc->dma_buf) |
2664 | return -ENOMEM; | |
2665 | ||
2666 | nfc->use_dma = true; | |
2667 | ||
2668 | return 0; | |
2669 | } | |
2670 | ||
bd9c3f9b DM |
2671 | static void marvell_nfc_reset(struct marvell_nfc *nfc) |
2672 | { | |
2673 | /* | |
2674 | * ECC operations and interruptions are only enabled when specifically | |
2675 | * needed. ECC shall not be activated in the early stages (fails probe). | |
2676 | * Arbiter flag, even if marked as "reserved", must be set (empirical). | |
2677 | * SPARE_EN bit must always be set or ECC bytes will not be at the same | |
2678 | * offset in the read page and this will fail the protection. | |
2679 | */ | |
2680 | writel_relaxed(NDCR_ALL_INT | NDCR_ND_ARB_EN | NDCR_SPARE_EN | | |
2681 | NDCR_RD_ID_CNT(NFCV1_READID_LEN), nfc->regs + NDCR); | |
2682 | writel_relaxed(0xFFFFFFFF, nfc->regs + NDSR); | |
2683 | writel_relaxed(0, nfc->regs + NDECCCTRL); | |
2684 | } | |
2685 | ||
02f26ecf MR |
2686 | static int marvell_nfc_init(struct marvell_nfc *nfc) |
2687 | { | |
2688 | struct device_node *np = nfc->dev->of_node; | |
2689 | ||
2690 | /* | |
2691 | * Some SoCs like A7k/A8k need to enable manually the NAND | |
2692 | * controller, gated clocks and reset bits to avoid being bootloader | |
2693 | * dependent. This is done through the use of the System Functions | |
2694 | * registers. | |
2695 | */ | |
2696 | if (nfc->caps->need_system_controller) { | |
2697 | struct regmap *sysctrl_base = | |
2698 | syscon_regmap_lookup_by_phandle(np, | |
2699 | "marvell,system-controller"); | |
2700 | u32 reg; | |
2701 | ||
2702 | if (IS_ERR(sysctrl_base)) | |
2703 | return PTR_ERR(sysctrl_base); | |
2704 | ||
2705 | reg = GENCONF_SOC_DEVICE_MUX_NFC_EN | | |
2706 | GENCONF_SOC_DEVICE_MUX_ECC_CLK_RST | | |
2707 | GENCONF_SOC_DEVICE_MUX_ECC_CORE_RST | | |
2708 | GENCONF_SOC_DEVICE_MUX_NFC_INT_EN; | |
2709 | regmap_write(sysctrl_base, GENCONF_SOC_DEVICE_MUX, reg); | |
2710 | ||
2711 | regmap_read(sysctrl_base, GENCONF_CLK_GATING_CTRL, ®); | |
2712 | reg |= GENCONF_CLK_GATING_CTRL_ND_GATE; | |
2713 | regmap_write(sysctrl_base, GENCONF_CLK_GATING_CTRL, reg); | |
2714 | ||
2715 | regmap_read(sysctrl_base, GENCONF_ND_CLK_CTRL, ®); | |
2716 | reg |= GENCONF_ND_CLK_CTRL_EN; | |
2717 | regmap_write(sysctrl_base, GENCONF_ND_CLK_CTRL, reg); | |
2718 | } | |
2719 | ||
2720 | /* Configure the DMA if appropriate */ | |
2721 | if (!nfc->caps->is_nfcv2) | |
2722 | marvell_nfc_init_dma(nfc); | |
2723 | ||
bd9c3f9b | 2724 | marvell_nfc_reset(nfc); |
02f26ecf MR |
2725 | |
2726 | return 0; | |
2727 | } | |
2728 | ||
2729 | static int marvell_nfc_probe(struct platform_device *pdev) | |
2730 | { | |
2731 | struct device *dev = &pdev->dev; | |
2732 | struct resource *r; | |
2733 | struct marvell_nfc *nfc; | |
2734 | int ret; | |
2735 | int irq; | |
2736 | ||
2737 | nfc = devm_kzalloc(&pdev->dev, sizeof(struct marvell_nfc), | |
2738 | GFP_KERNEL); | |
2739 | if (!nfc) | |
2740 | return -ENOMEM; | |
2741 | ||
2742 | nfc->dev = dev; | |
7da45139 | 2743 | nand_controller_init(&nfc->controller); |
8831e48b | 2744 | nfc->controller.ops = &marvell_nand_controller_ops; |
02f26ecf MR |
2745 | INIT_LIST_HEAD(&nfc->chips); |
2746 | ||
2747 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
2748 | nfc->regs = devm_ioremap_resource(dev, r); | |
2749 | if (IS_ERR(nfc->regs)) | |
2750 | return PTR_ERR(nfc->regs); | |
2751 | ||
2752 | irq = platform_get_irq(pdev, 0); | |
2753 | if (irq < 0) { | |
2754 | dev_err(dev, "failed to retrieve irq\n"); | |
2755 | return irq; | |
2756 | } | |
2757 | ||
6b6de654 | 2758 | nfc->core_clk = devm_clk_get(&pdev->dev, "core"); |
961ba15c GC |
2759 | |
2760 | /* Managed the legacy case (when the first clock was not named) */ | |
6b6de654 BB |
2761 | if (nfc->core_clk == ERR_PTR(-ENOENT)) |
2762 | nfc->core_clk = devm_clk_get(&pdev->dev, NULL); | |
961ba15c | 2763 | |
6b6de654 BB |
2764 | if (IS_ERR(nfc->core_clk)) |
2765 | return PTR_ERR(nfc->core_clk); | |
02f26ecf | 2766 | |
6b6de654 | 2767 | ret = clk_prepare_enable(nfc->core_clk); |
02f26ecf MR |
2768 | if (ret) |
2769 | return ret; | |
2770 | ||
961ba15c | 2771 | nfc->reg_clk = devm_clk_get(&pdev->dev, "reg"); |
f9e64d61 DM |
2772 | if (IS_ERR(nfc->reg_clk)) { |
2773 | if (PTR_ERR(nfc->reg_clk) != -ENOENT) { | |
961ba15c | 2774 | ret = PTR_ERR(nfc->reg_clk); |
6b6de654 | 2775 | goto unprepare_core_clk; |
961ba15c | 2776 | } |
f9e64d61 DM |
2777 | |
2778 | nfc->reg_clk = NULL; | |
961ba15c GC |
2779 | } |
2780 | ||
f9e64d61 DM |
2781 | ret = clk_prepare_enable(nfc->reg_clk); |
2782 | if (ret) | |
2783 | goto unprepare_core_clk; | |
2784 | ||
02f26ecf MR |
2785 | marvell_nfc_disable_int(nfc, NDCR_ALL_INT); |
2786 | marvell_nfc_clear_int(nfc, NDCR_ALL_INT); | |
2787 | ret = devm_request_irq(dev, irq, marvell_nfc_isr, | |
2788 | 0, "marvell-nfc", nfc); | |
2789 | if (ret) | |
961ba15c | 2790 | goto unprepare_reg_clk; |
02f26ecf MR |
2791 | |
2792 | /* Get NAND controller capabilities */ | |
2793 | if (pdev->id_entry) | |
2794 | nfc->caps = (void *)pdev->id_entry->driver_data; | |
2795 | else | |
2796 | nfc->caps = of_device_get_match_data(&pdev->dev); | |
2797 | ||
2798 | if (!nfc->caps) { | |
2799 | dev_err(dev, "Could not retrieve NFC caps\n"); | |
2800 | ret = -EINVAL; | |
961ba15c | 2801 | goto unprepare_reg_clk; |
02f26ecf MR |
2802 | } |
2803 | ||
2804 | /* Init the controller and then probe the chips */ | |
2805 | ret = marvell_nfc_init(nfc); | |
2806 | if (ret) | |
961ba15c | 2807 | goto unprepare_reg_clk; |
02f26ecf MR |
2808 | |
2809 | platform_set_drvdata(pdev, nfc); | |
2810 | ||
2811 | ret = marvell_nand_chips_init(dev, nfc); | |
2812 | if (ret) | |
961ba15c | 2813 | goto unprepare_reg_clk; |
02f26ecf MR |
2814 | |
2815 | return 0; | |
2816 | ||
961ba15c GC |
2817 | unprepare_reg_clk: |
2818 | clk_disable_unprepare(nfc->reg_clk); | |
6b6de654 BB |
2819 | unprepare_core_clk: |
2820 | clk_disable_unprepare(nfc->core_clk); | |
02f26ecf MR |
2821 | |
2822 | return ret; | |
2823 | } | |
2824 | ||
2825 | static int marvell_nfc_remove(struct platform_device *pdev) | |
2826 | { | |
2827 | struct marvell_nfc *nfc = platform_get_drvdata(pdev); | |
2828 | ||
2829 | marvell_nand_chips_cleanup(nfc); | |
2830 | ||
2831 | if (nfc->use_dma) { | |
2832 | dmaengine_terminate_all(nfc->dma_chan); | |
2833 | dma_release_channel(nfc->dma_chan); | |
2834 | } | |
2835 | ||
961ba15c | 2836 | clk_disable_unprepare(nfc->reg_clk); |
6b6de654 | 2837 | clk_disable_unprepare(nfc->core_clk); |
02f26ecf MR |
2838 | |
2839 | return 0; | |
2840 | } | |
2841 | ||
bd9c3f9b DM |
2842 | static int __maybe_unused marvell_nfc_suspend(struct device *dev) |
2843 | { | |
2844 | struct marvell_nfc *nfc = dev_get_drvdata(dev); | |
2845 | struct marvell_nand_chip *chip; | |
2846 | ||
2847 | list_for_each_entry(chip, &nfc->chips, node) | |
2848 | marvell_nfc_wait_ndrun(&chip->chip); | |
2849 | ||
2850 | clk_disable_unprepare(nfc->reg_clk); | |
2851 | clk_disable_unprepare(nfc->core_clk); | |
2852 | ||
2853 | return 0; | |
2854 | } | |
2855 | ||
2856 | static int __maybe_unused marvell_nfc_resume(struct device *dev) | |
2857 | { | |
2858 | struct marvell_nfc *nfc = dev_get_drvdata(dev); | |
2859 | int ret; | |
2860 | ||
2861 | ret = clk_prepare_enable(nfc->core_clk); | |
2862 | if (ret < 0) | |
2863 | return ret; | |
2864 | ||
f9e64d61 DM |
2865 | ret = clk_prepare_enable(nfc->reg_clk); |
2866 | if (ret < 0) | |
2867 | return ret; | |
bd9c3f9b DM |
2868 | |
2869 | /* | |
2870 | * Reset nfc->selected_chip so the next command will cause the timing | |
2871 | * registers to be restored in marvell_nfc_select_chip(). | |
2872 | */ | |
2873 | nfc->selected_chip = NULL; | |
2874 | ||
2875 | /* Reset registers that have lost their contents */ | |
2876 | marvell_nfc_reset(nfc); | |
2877 | ||
2878 | return 0; | |
2879 | } | |
2880 | ||
2881 | static const struct dev_pm_ops marvell_nfc_pm_ops = { | |
2882 | SET_SYSTEM_SLEEP_PM_OPS(marvell_nfc_suspend, marvell_nfc_resume) | |
2883 | }; | |
2884 | ||
02f26ecf MR |
2885 | static const struct marvell_nfc_caps marvell_armada_8k_nfc_caps = { |
2886 | .max_cs_nb = 4, | |
2887 | .max_rb_nb = 2, | |
2888 | .need_system_controller = true, | |
2889 | .is_nfcv2 = true, | |
2890 | }; | |
2891 | ||
2892 | static const struct marvell_nfc_caps marvell_armada370_nfc_caps = { | |
2893 | .max_cs_nb = 4, | |
2894 | .max_rb_nb = 2, | |
2895 | .is_nfcv2 = true, | |
2896 | }; | |
2897 | ||
2898 | static const struct marvell_nfc_caps marvell_pxa3xx_nfc_caps = { | |
2899 | .max_cs_nb = 2, | |
2900 | .max_rb_nb = 1, | |
2901 | .use_dma = true, | |
2902 | }; | |
2903 | ||
2904 | static const struct marvell_nfc_caps marvell_armada_8k_nfc_legacy_caps = { | |
2905 | .max_cs_nb = 4, | |
2906 | .max_rb_nb = 2, | |
2907 | .need_system_controller = true, | |
2908 | .legacy_of_bindings = true, | |
2909 | .is_nfcv2 = true, | |
2910 | }; | |
2911 | ||
2912 | static const struct marvell_nfc_caps marvell_armada370_nfc_legacy_caps = { | |
2913 | .max_cs_nb = 4, | |
2914 | .max_rb_nb = 2, | |
2915 | .legacy_of_bindings = true, | |
2916 | .is_nfcv2 = true, | |
2917 | }; | |
2918 | ||
2919 | static const struct marvell_nfc_caps marvell_pxa3xx_nfc_legacy_caps = { | |
2920 | .max_cs_nb = 2, | |
2921 | .max_rb_nb = 1, | |
2922 | .legacy_of_bindings = true, | |
2923 | .use_dma = true, | |
2924 | }; | |
2925 | ||
2926 | static const struct platform_device_id marvell_nfc_platform_ids[] = { | |
2927 | { | |
2928 | .name = "pxa3xx-nand", | |
2929 | .driver_data = (kernel_ulong_t)&marvell_pxa3xx_nfc_legacy_caps, | |
2930 | }, | |
2931 | { /* sentinel */ }, | |
2932 | }; | |
2933 | MODULE_DEVICE_TABLE(platform, marvell_nfc_platform_ids); | |
2934 | ||
2935 | static const struct of_device_id marvell_nfc_of_ids[] = { | |
2936 | { | |
2937 | .compatible = "marvell,armada-8k-nand-controller", | |
2938 | .data = &marvell_armada_8k_nfc_caps, | |
2939 | }, | |
2940 | { | |
2941 | .compatible = "marvell,armada370-nand-controller", | |
2942 | .data = &marvell_armada370_nfc_caps, | |
2943 | }, | |
2944 | { | |
2945 | .compatible = "marvell,pxa3xx-nand-controller", | |
2946 | .data = &marvell_pxa3xx_nfc_caps, | |
2947 | }, | |
2948 | /* Support for old/deprecated bindings: */ | |
2949 | { | |
2950 | .compatible = "marvell,armada-8k-nand", | |
2951 | .data = &marvell_armada_8k_nfc_legacy_caps, | |
2952 | }, | |
2953 | { | |
2954 | .compatible = "marvell,armada370-nand", | |
2955 | .data = &marvell_armada370_nfc_legacy_caps, | |
2956 | }, | |
2957 | { | |
2958 | .compatible = "marvell,pxa3xx-nand", | |
2959 | .data = &marvell_pxa3xx_nfc_legacy_caps, | |
2960 | }, | |
2961 | { /* sentinel */ }, | |
2962 | }; | |
2963 | MODULE_DEVICE_TABLE(of, marvell_nfc_of_ids); | |
2964 | ||
2965 | static struct platform_driver marvell_nfc_driver = { | |
2966 | .driver = { | |
2967 | .name = "marvell-nfc", | |
2968 | .of_match_table = marvell_nfc_of_ids, | |
bd9c3f9b | 2969 | .pm = &marvell_nfc_pm_ops, |
02f26ecf MR |
2970 | }, |
2971 | .id_table = marvell_nfc_platform_ids, | |
2972 | .probe = marvell_nfc_probe, | |
2973 | .remove = marvell_nfc_remove, | |
2974 | }; | |
2975 | module_platform_driver(marvell_nfc_driver); | |
2976 | ||
2977 | MODULE_LICENSE("GPL"); | |
2978 | MODULE_DESCRIPTION("Marvell NAND controller driver"); |