4 * Copyright (C) 2008 Atmel Corporation
5 * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
7 * Licensed under the GPL-2 or later.
13 #include <spi_flash.h>
16 #include "spi_flash_internal.h"
18 static void spi_flash_addr(u32 addr, u8 *cmd)
20 /* cmd[0] is actual command */
26 static int spi_flash_read_write(struct spi_slave *spi,
27 const u8 *cmd, size_t cmd_len,
28 const u8 *data_out, u8 *data_in,
31 unsigned long flags = SPI_XFER_BEGIN;
35 flags |= SPI_XFER_END;
37 ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
39 debug("SF: Failed to send command (%zu bytes): %d\n",
41 } else if (data_len != 0) {
42 ret = spi_xfer(spi, data_len * 8, data_out, data_in, SPI_XFER_END);
44 debug("SF: Failed to transfer %zu bytes of data: %d\n",
51 int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
53 return spi_flash_cmd_read(spi, &cmd, 1, response, len);
56 int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
57 size_t cmd_len, void *data, size_t data_len)
59 return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
62 int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
63 const void *data, size_t data_len)
65 return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
68 int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
69 size_t len, const void *buf)
71 unsigned long page_addr, byte_addr, page_size;
72 size_t chunk_len, actual;
76 page_size = flash->page_size;
77 page_addr = offset / page_size;
78 byte_addr = offset % page_size;
80 ret = spi_claim_bus(flash->spi);
82 debug("SF: unable to claim SPI bus\n");
86 cmd[0] = CMD_PAGE_PROGRAM;
87 for (actual = 0; actual < len; actual += chunk_len) {
88 chunk_len = min(len - actual, page_size - byte_addr);
90 cmd[1] = page_addr >> 8;
94 debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
95 buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
97 ret = spi_flash_cmd_write_enable(flash);
99 debug("SF: enabling write failed\n");
103 ret = spi_flash_cmd_write(flash->spi, cmd, 4,
104 buf + actual, chunk_len);
106 debug("SF: write failed\n");
110 ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
118 debug("SF: program %s %zu bytes @ %#x\n",
119 ret ? "failure" : "success", len, offset);
121 spi_release_bus(flash->spi);
125 int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
126 size_t cmd_len, void *data, size_t data_len)
128 struct spi_slave *spi = flash->spi;
132 ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len);
133 spi_release_bus(spi);
138 int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
139 size_t len, void *data)
143 cmd[0] = CMD_READ_ARRAY_FAST;
144 spi_flash_addr(offset, cmd);
147 return spi_flash_read_common(flash, cmd, sizeof(cmd), data, len);
150 int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
153 struct spi_slave *spi = flash->spi;
154 unsigned long timebase;
158 ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
160 debug("SF: Failed to send command %02x: %d\n", cmd, ret);
164 timebase = get_timer(0);
168 ret = spi_xfer(spi, 8, NULL, &status, 0);
172 if ((status & poll_bit) == 0)
175 } while (get_timer(timebase) < timeout);
177 spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
179 if ((status & poll_bit) == 0)
183 debug("SF: time out!\n");
187 int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
189 return spi_flash_cmd_poll_bit(flash, timeout,
190 CMD_READ_STATUS, STATUS_WIP);
193 int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
195 u32 start, end, erase_size;
199 erase_size = flash->sector_size;
200 if (offset % erase_size || len % erase_size) {
201 debug("SF: Erase offset/length not multiple of erase size\n");
205 ret = spi_claim_bus(flash->spi);
207 debug("SF: Unable to claim SPI bus\n");
211 if (erase_size == 4096)
212 cmd[0] = CMD_ERASE_4K;
214 cmd[0] = CMD_ERASE_64K;
218 while (offset < end) {
219 spi_flash_addr(offset, cmd);
220 offset += erase_size;
222 debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
223 cmd[2], cmd[3], offset);
225 ret = spi_flash_cmd_write_enable(flash);
229 ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
233 ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
238 debug("SF: Successfully erased %zu bytes @ %#x\n", len, start);
241 spi_release_bus(flash->spi);
245 int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
250 ret = spi_flash_cmd_write_enable(flash);
252 debug("SF: enabling write failed\n");
256 cmd = CMD_WRITE_STATUS;
257 ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &sr, 1);
259 debug("SF: fail to write status register\n");
263 ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
265 debug("SF: write status register timed out\n");
273 * The following table holds all device probe functions
275 * shift: number of continuation bytes before the ID
276 * idcode: the expected IDCODE or 0xff for non JEDEC devices
277 * probe: the function to call
279 * Non JEDEC devices should be ordered in the table such that
280 * the probe functions with best detection algorithms come first.
282 * Several matching entries are permitted, they will be tried
283 * in sequence until a probe function returns non NULL.
285 * IDCODE_CONT_LEN may be redefined if a device needs to declare a
286 * larger "shift" value. IDCODE_PART_LEN generally shouldn't be
287 * changed. This is the max number of bytes probe functions may
288 * examine when looking up part-specific identification info.
290 * Probe functions will be given the idcode buffer starting at their
291 * manu id byte (the "idcode" in the table below). In other words,
292 * all of the continuation bytes will be skipped (the "shift" below).
294 #define IDCODE_CONT_LEN 0
295 #define IDCODE_PART_LEN 5
296 static const struct {
299 struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode);
301 /* Keep it sorted by define name */
302 #ifdef CONFIG_SPI_FLASH_ATMEL
303 { 0, 0x1f, spi_flash_probe_atmel, },
305 #ifdef CONFIG_SPI_FLASH_EON
306 { 0, 0x1c, spi_flash_probe_eon, },
308 #ifdef CONFIG_SPI_FLASH_MACRONIX
309 { 0, 0xc2, spi_flash_probe_macronix, },
311 #ifdef CONFIG_SPI_FLASH_SPANSION
312 { 0, 0x01, spi_flash_probe_spansion, },
314 #ifdef CONFIG_SPI_FLASH_SST
315 { 0, 0xbf, spi_flash_probe_sst, },
317 #ifdef CONFIG_SPI_FLASH_STMICRO
318 { 0, 0x20, spi_flash_probe_stmicro, },
320 #ifdef CONFIG_SPI_FLASH_WINBOND
321 { 0, 0xef, spi_flash_probe_winbond, },
323 #ifdef CONFIG_SPI_FRAM_RAMTRON
324 { 6, 0xc2, spi_fram_probe_ramtron, },
325 # undef IDCODE_CONT_LEN
326 # define IDCODE_CONT_LEN 6
328 /* Keep it sorted by best detection */
329 #ifdef CONFIG_SPI_FLASH_STMICRO
330 { 0, 0xff, spi_flash_probe_stmicro, },
332 #ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
333 { 0, 0xff, spi_fram_probe_ramtron, },
336 #define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN)
338 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
339 unsigned int max_hz, unsigned int spi_mode)
341 struct spi_slave *spi;
342 struct spi_flash *flash = NULL;
344 u8 idcode[IDCODE_LEN], *idp;
346 spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
348 printf("SF: Failed to set up slave\n");
352 ret = spi_claim_bus(spi);
354 debug("SF: Failed to claim SPI bus: %d\n", ret);
358 /* Read the ID codes */
359 ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
364 printf("SF: Got idcodes\n");
365 print_buffer(0, idcode, 1, sizeof(idcode), 0);
368 /* count the number of continuation bytes */
369 for (shift = 0, idp = idcode;
370 shift < IDCODE_CONT_LEN && *idp == 0x7f;
374 /* search the table for matches in shift and id */
375 for (i = 0; i < ARRAY_SIZE(flashes); ++i)
376 if (flashes[i].shift == shift && flashes[i].idcode == *idp) {
377 /* we have a match, call probe */
378 flash = flashes[i].probe(spi, idp);
384 printf("SF: Unsupported manufacturer %02x\n", *idp);
385 goto err_manufacturer_probe;
388 printf("SF: Detected %s with page size ", flash->name);
389 print_size(flash->sector_size, ", total ");
390 print_size(flash->size, "\n");
392 spi_release_bus(spi);
396 err_manufacturer_probe:
398 spi_release_bus(spi);
404 void spi_flash_free(struct spi_flash *flash)
406 spi_free_slave(flash->spi);