4 * Copyright (C) 2008 Atmel Corporation
5 * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
7 * Licensed under the GPL-2 or later.
14 #include <spi_flash.h>
17 #include "spi_flash_internal.h"
19 DECLARE_GLOBAL_DATA_PTR;
21 static void spi_flash_addr(u32 addr, u8 *cmd)
23 /* cmd[0] is actual command */
29 static int spi_flash_read_write(struct spi_slave *spi,
30 const u8 *cmd, size_t cmd_len,
31 const u8 *data_out, u8 *data_in,
34 unsigned long flags = SPI_XFER_BEGIN;
38 flags |= SPI_XFER_END;
40 ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
42 debug("SF: Failed to send command (%zu bytes): %d\n",
44 } else if (data_len != 0) {
45 ret = spi_xfer(spi, data_len * 8, data_out, data_in, SPI_XFER_END);
47 debug("SF: Failed to transfer %zu bytes of data: %d\n",
54 int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
56 return spi_flash_cmd_read(spi, &cmd, 1, response, len);
59 int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
60 size_t cmd_len, void *data, size_t data_len)
62 return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
65 int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
66 const void *data, size_t data_len)
68 return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
71 int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
72 size_t len, const void *buf)
74 unsigned long byte_addr, page_size;
75 size_t chunk_len, actual;
79 page_size = flash->page_size;
81 ret = spi_claim_bus(flash->spi);
83 debug("SF: unable to claim SPI bus\n");
87 cmd[0] = CMD_PAGE_PROGRAM;
88 for (actual = 0; actual < len; actual += chunk_len) {
89 #ifdef CONFIG_SPI_FLASH_BAR
92 bank_sel = offset / SPI_FLASH_16MB_BOUN;
94 ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
96 debug("SF: fail to set bank%d\n", bank_sel);
100 byte_addr = offset % page_size;
101 chunk_len = min(len - actual, page_size - byte_addr);
103 if (flash->spi->max_write_size)
104 chunk_len = min(chunk_len, flash->spi->max_write_size);
106 spi_flash_addr(offset, cmd);
108 debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
109 buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
111 ret = spi_flash_cmd_write_enable(flash);
113 debug("SF: enabling write failed\n");
117 ret = spi_flash_cmd_write(flash->spi, cmd, 4,
118 buf + actual, chunk_len);
120 debug("SF: write failed\n");
124 ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
131 spi_release_bus(flash->spi);
135 int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
136 size_t cmd_len, void *data, size_t data_len)
138 struct spi_slave *spi = flash->spi;
142 ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len);
143 spi_release_bus(spi);
148 int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
149 size_t len, void *data)
151 u8 cmd[5], bank_sel = 0;
152 u32 remain_len, read_len;
155 /* Handle memory-mapped SPI */
156 if (flash->memory_map) {
157 memcpy(data, flash->memory_map + offset, len);
161 cmd[0] = CMD_READ_ARRAY_FAST;
165 #ifdef CONFIG_SPI_FLASH_BAR
166 bank_sel = offset / SPI_FLASH_16MB_BOUN;
168 ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
170 debug("SF: fail to set bank%d\n", bank_sel);
174 remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1) - offset);
175 if (len < remain_len)
178 read_len = remain_len;
180 spi_flash_addr(offset, cmd);
182 ret = spi_flash_read_common(flash, cmd, sizeof(cmd),
185 debug("SF: read failed\n");
197 int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
200 struct spi_slave *spi = flash->spi;
201 unsigned long timebase;
205 ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
207 debug("SF: Failed to send command %02x: %d\n", cmd, ret);
211 timebase = get_timer(0);
215 ret = spi_xfer(spi, 8, NULL, &status, 0);
219 if ((status & poll_bit) == 0)
222 } while (get_timer(timebase) < timeout);
224 spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
226 if ((status & poll_bit) == 0)
230 debug("SF: time out!\n");
234 int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
236 return spi_flash_cmd_poll_bit(flash, timeout,
237 CMD_READ_STATUS, STATUS_WIP);
240 int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
246 erase_size = flash->sector_size;
247 if (offset % erase_size || len % erase_size) {
248 debug("SF: Erase offset/length not multiple of erase size\n");
252 ret = spi_claim_bus(flash->spi);
254 debug("SF: Unable to claim SPI bus\n");
258 if (erase_size == 4096)
259 cmd[0] = CMD_ERASE_4K;
261 cmd[0] = CMD_ERASE_64K;
264 #ifdef CONFIG_SPI_FLASH_BAR
267 bank_sel = offset / SPI_FLASH_16MB_BOUN;
269 ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
271 debug("SF: fail to set bank%d\n", bank_sel);
275 spi_flash_addr(offset, cmd);
277 debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
278 cmd[2], cmd[3], offset);
280 ret = spi_flash_cmd_write_enable(flash);
284 ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
288 ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
292 offset += erase_size;
297 spi_release_bus(flash->spi);
301 int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
306 ret = spi_flash_cmd_write_enable(flash);
308 debug("SF: enabling write failed\n");
312 cmd = CMD_WRITE_STATUS;
313 ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &sr, 1);
315 debug("SF: fail to write status register\n");
319 ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
321 debug("SF: write status register timed out\n");
328 #ifdef CONFIG_SPI_FLASH_BAR
329 int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel)
334 if (flash->bank_curr == bank_sel) {
335 debug("SF: not require to enable bank%d\n", bank_sel);
339 cmd = flash->bank_write_cmd;
340 ret = spi_flash_cmd_write_enable(flash);
342 debug("SF: enabling write failed\n");
346 ret = spi_flash_cmd_write(flash->spi, &cmd, 1, &bank_sel, 1);
348 debug("SF: fail to write bank addr register\n");
351 flash->bank_curr = bank_sel;
353 ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
355 debug("SF: write bank addr register timed out\n");
362 int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
367 /* discover bank cmds */
369 case SPI_FLASH_SPANSION_IDCODE0:
370 flash->bank_read_cmd = CMD_BANKADDR_BRRD;
371 flash->bank_write_cmd = CMD_BANKADDR_BRWR;
373 case SPI_FLASH_STMICRO_IDCODE0:
374 case SPI_FLASH_WINBOND_IDCODE0:
375 flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
376 flash->bank_write_cmd = CMD_EXTNADDR_WREAR;
379 printf("SF: Unsupported bank commands %02x\n", idcode0);
383 /* read the bank reg - on which bank the flash is in currently */
384 cmd = flash->bank_read_cmd;
385 if (flash->size > SPI_FLASH_16MB_BOUN) {
386 if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) {
387 debug("SF: fail to read bank addr register\n");
390 flash->bank_curr = curr_bank;
392 flash->bank_curr = curr_bank;
399 #ifdef CONFIG_OF_CONTROL
400 int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
406 /* If there is no node, do nothing */
407 node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
411 addr = fdtdec_get_addr_size(blob, node, "memory-map", &size);
412 if (addr == FDT_ADDR_T_NONE) {
413 debug("%s: Cannot decode address\n", __func__);
417 if (flash->size != size) {
418 debug("%s: Memory map must cover entire device\n", __func__);
421 flash->memory_map = (void *)addr;
425 #endif /* CONFIG_OF_CONTROL */
428 * The following table holds all device probe functions
430 * shift: number of continuation bytes before the ID
431 * idcode: the expected IDCODE or 0xff for non JEDEC devices
432 * probe: the function to call
434 * Non JEDEC devices should be ordered in the table such that
435 * the probe functions with best detection algorithms come first.
437 * Several matching entries are permitted, they will be tried
438 * in sequence until a probe function returns non NULL.
440 * IDCODE_CONT_LEN may be redefined if a device needs to declare a
441 * larger "shift" value. IDCODE_PART_LEN generally shouldn't be
442 * changed. This is the max number of bytes probe functions may
443 * examine when looking up part-specific identification info.
445 * Probe functions will be given the idcode buffer starting at their
446 * manu id byte (the "idcode" in the table below). In other words,
447 * all of the continuation bytes will be skipped (the "shift" below).
449 #define IDCODE_CONT_LEN 0
450 #define IDCODE_PART_LEN 5
451 static const struct {
454 struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode);
456 /* Keep it sorted by define name */
457 #ifdef CONFIG_SPI_FLASH_ATMEL
458 { 0, 0x1f, spi_flash_probe_atmel, },
460 #ifdef CONFIG_SPI_FLASH_EON
461 { 0, 0x1c, spi_flash_probe_eon, },
463 #ifdef CONFIG_SPI_FLASH_MACRONIX
464 { 0, 0xc2, spi_flash_probe_macronix, },
466 #ifdef CONFIG_SPI_FLASH_SPANSION
467 { 0, 0x01, spi_flash_probe_spansion, },
469 #ifdef CONFIG_SPI_FLASH_SST
470 { 0, 0xbf, spi_flash_probe_sst, },
472 #ifdef CONFIG_SPI_FLASH_STMICRO
473 { 0, 0x20, spi_flash_probe_stmicro, },
475 #ifdef CONFIG_SPI_FLASH_WINBOND
476 { 0, 0xef, spi_flash_probe_winbond, },
478 #ifdef CONFIG_SPI_FRAM_RAMTRON
479 { 6, 0xc2, spi_fram_probe_ramtron, },
480 # undef IDCODE_CONT_LEN
481 # define IDCODE_CONT_LEN 6
483 /* Keep it sorted by best detection */
484 #ifdef CONFIG_SPI_FLASH_STMICRO
485 { 0, 0xff, spi_flash_probe_stmicro, },
487 #ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
488 { 0, 0xff, spi_fram_probe_ramtron, },
491 #define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN)
493 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
494 unsigned int max_hz, unsigned int spi_mode)
496 struct spi_slave *spi;
497 struct spi_flash *flash = NULL;
499 u8 idcode[IDCODE_LEN], *idp;
501 spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
503 printf("SF: Failed to set up slave\n");
507 ret = spi_claim_bus(spi);
509 debug("SF: Failed to claim SPI bus: %d\n", ret);
513 /* Read the ID codes */
514 ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
519 printf("SF: Got idcodes\n");
520 print_buffer(0, idcode, 1, sizeof(idcode), 0);
523 /* count the number of continuation bytes */
524 for (shift = 0, idp = idcode;
525 shift < IDCODE_CONT_LEN && *idp == 0x7f;
529 /* search the table for matches in shift and id */
530 for (i = 0; i < ARRAY_SIZE(flashes); ++i)
531 if (flashes[i].shift == shift && flashes[i].idcode == *idp) {
532 /* we have a match, call probe */
533 flash = flashes[i].probe(spi, idp);
539 printf("SF: Unsupported manufacturer %02x\n", *idp);
540 goto err_manufacturer_probe;
543 #ifdef CONFIG_SPI_FLASH_BAR
544 /* Configure the BAR - disover bank cmds and read current bank */
545 ret = spi_flash_bank_config(flash, *idp);
547 goto err_manufacturer_probe;
550 #ifdef CONFIG_OF_CONTROL
551 if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
552 debug("SF: FDT decode error\n");
553 goto err_manufacturer_probe;
556 printf("SF: Detected %s with page size ", flash->name);
557 print_size(flash->sector_size, ", total ");
558 print_size(flash->size, "");
559 if (flash->memory_map)
560 printf(", mapped at %p", flash->memory_map);
563 spi_release_bus(spi);
567 err_manufacturer_probe:
569 spi_release_bus(spi);
575 void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi,
578 struct spi_flash *flash;
583 debug("SF: Failed to allocate memory\n");
586 memset(ptr, '\0', size);
587 flash = (struct spi_flash *)(ptr + offset);
589 /* Set up some basic fields - caller will sort out sizes */
593 flash->read = spi_flash_cmd_read_fast;
594 flash->write = spi_flash_cmd_write_multi;
595 flash->erase = spi_flash_cmd_erase;
600 void spi_flash_free(struct spi_flash *flash)
602 spi_free_slave(flash->spi);