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, u8 erase_cmd,
194 u32 offset, size_t len)
196 u32 start, end, erase_size;
200 erase_size = flash->sector_size;
201 if (offset % erase_size || len % erase_size) {
202 debug("SF: Erase offset/length not multiple of erase size\n");
206 ret = spi_claim_bus(flash->spi);
208 debug("SF: Unable to claim SPI bus\n");
216 while (offset < end) {
217 spi_flash_addr(offset, cmd);
218 offset += erase_size;
220 debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
221 cmd[2], cmd[3], offset);
223 ret = spi_flash_cmd_write_enable(flash);
227 ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
231 ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
236 debug("SF: Successfully erased %lu bytes @ %#x\n",
237 len * erase_size, start);
240 spi_release_bus(flash->spi);
245 * The following table holds all device probe functions
247 * shift: number of continuation bytes before the ID
248 * idcode: the expected IDCODE or 0xff for non JEDEC devices
249 * probe: the function to call
251 * Non JEDEC devices should be ordered in the table such that
252 * the probe functions with best detection algorithms come first.
254 * Several matching entries are permitted, they will be tried
255 * in sequence until a probe function returns non NULL.
257 * IDCODE_CONT_LEN may be redefined if a device needs to declare a
258 * larger "shift" value. IDCODE_PART_LEN generally shouldn't be
259 * changed. This is the max number of bytes probe functions may
260 * examine when looking up part-specific identification info.
262 * Probe functions will be given the idcode buffer starting at their
263 * manu id byte (the "idcode" in the table below). In other words,
264 * all of the continuation bytes will be skipped (the "shift" below).
266 #define IDCODE_CONT_LEN 0
267 #define IDCODE_PART_LEN 5
268 static const struct {
271 struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode);
273 /* Keep it sorted by define name */
274 #ifdef CONFIG_SPI_FLASH_ATMEL
275 { 0, 0x1f, spi_flash_probe_atmel, },
277 #ifdef CONFIG_SPI_FLASH_EON
278 { 0, 0x1c, spi_flash_probe_eon, },
280 #ifdef CONFIG_SPI_FLASH_MACRONIX
281 { 0, 0xc2, spi_flash_probe_macronix, },
283 #ifdef CONFIG_SPI_FLASH_SPANSION
284 { 0, 0x01, spi_flash_probe_spansion, },
286 #ifdef CONFIG_SPI_FLASH_SST
287 { 0, 0xbf, spi_flash_probe_sst, },
289 #ifdef CONFIG_SPI_FLASH_STMICRO
290 { 0, 0x20, spi_flash_probe_stmicro, },
292 #ifdef CONFIG_SPI_FLASH_WINBOND
293 { 0, 0xef, spi_flash_probe_winbond, },
295 #ifdef CONFIG_SPI_FRAM_RAMTRON
296 { 6, 0xc2, spi_fram_probe_ramtron, },
297 # undef IDCODE_CONT_LEN
298 # define IDCODE_CONT_LEN 6
300 /* Keep it sorted by best detection */
301 #ifdef CONFIG_SPI_FLASH_STMICRO
302 { 0, 0xff, spi_flash_probe_stmicro, },
304 #ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
305 { 0, 0xff, spi_fram_probe_ramtron, },
308 #define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN)
310 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
311 unsigned int max_hz, unsigned int spi_mode)
313 struct spi_slave *spi;
314 struct spi_flash *flash = NULL;
316 u8 idcode[IDCODE_LEN], *idp;
318 spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
320 printf("SF: Failed to set up slave\n");
324 ret = spi_claim_bus(spi);
326 debug("SF: Failed to claim SPI bus: %d\n", ret);
330 /* Read the ID codes */
331 ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
336 printf("SF: Got idcodes\n");
337 print_buffer(0, idcode, 1, sizeof(idcode), 0);
340 /* count the number of continuation bytes */
341 for (shift = 0, idp = idcode;
342 shift < IDCODE_CONT_LEN && *idp == 0x7f;
346 /* search the table for matches in shift and id */
347 for (i = 0; i < ARRAY_SIZE(flashes); ++i)
348 if (flashes[i].shift == shift && flashes[i].idcode == *idp) {
349 /* we have a match, call probe */
350 flash = flashes[i].probe(spi, idp);
356 printf("SF: Unsupported manufacturer %02x\n", *idp);
357 goto err_manufacturer_probe;
360 printf("SF: Detected %s with page size ", flash->name);
361 print_size(flash->sector_size, ", total ");
362 print_size(flash->size, "\n");
364 spi_release_bus(spi);
368 err_manufacturer_probe:
370 spi_release_bus(spi);
376 void spi_flash_free(struct spi_flash *flash)
378 spi_free_slave(flash->spi);