* SPI flash interface
*
* Copyright (C) 2008 Atmel Corporation
+ * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
+ *
+ * Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <malloc.h>
#include <spi.h>
#include <spi_flash.h>
+#include <watchdog.h>
#include "spi_flash_internal.h"
-int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
+static void spi_flash_addr(u32 addr, u8 *cmd)
{
- unsigned long flags = SPI_XFER_BEGIN;
- int ret;
-
- if (len == 0)
- flags |= SPI_XFER_END;
-
- ret = spi_xfer(spi, 8, &cmd, NULL, flags);
- if (ret) {
- debug("SF: Failed to send command %02x: %d\n", cmd, ret);
- return ret;
- }
-
- if (len) {
- ret = spi_xfer(spi, len * 8, NULL, response, SPI_XFER_END);
- if (ret)
- debug("SF: Failed to read response (%zu bytes): %d\n",
- len, ret);
- }
-
- return ret;
+ /* cmd[0] is actual command */
+ cmd[1] = addr >> 16;
+ cmd[2] = addr >> 8;
+ cmd[3] = addr >> 0;
}
-int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
- size_t cmd_len, void *data, size_t data_len)
+static int spi_flash_read_write(struct spi_slave *spi,
+ const u8 *cmd, size_t cmd_len,
+ const u8 *data_out, u8 *data_in,
+ size_t data_len)
{
unsigned long flags = SPI_XFER_BEGIN;
int ret;
ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
if (ret) {
- debug("SF: Failed to send read command (%zu bytes): %d\n",
+ debug("SF: Failed to send command (%zu bytes): %d\n",
cmd_len, ret);
} else if (data_len != 0) {
- ret = spi_xfer(spi, data_len * 8, NULL, data, SPI_XFER_END);
+ ret = spi_xfer(spi, data_len * 8, data_out, data_in, SPI_XFER_END);
if (ret)
- debug("SF: Failed to read %zu bytes of data: %d\n",
+ debug("SF: Failed to transfer %zu bytes of data: %d\n",
data_len, ret);
}
return ret;
}
+int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
+{
+ return spi_flash_cmd_read(spi, &cmd, 1, response, len);
+}
+
+int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
+ size_t cmd_len, void *data, size_t data_len)
+{
+ return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
+}
+
int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
const void *data, size_t data_len)
{
- unsigned long flags = SPI_XFER_BEGIN;
+ return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
+}
+
+int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
+ size_t len, const void *buf)
+{
+ unsigned long page_addr, byte_addr, page_size;
+ size_t chunk_len, actual;
int ret;
+ u8 cmd[4];
- if (data_len == 0)
- flags |= SPI_XFER_END;
+ page_size = flash->page_size;
+ page_addr = offset / page_size;
+ byte_addr = offset % page_size;
- ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
+ ret = spi_claim_bus(flash->spi);
if (ret) {
- debug("SF: Failed to send read command (%zu bytes): %d\n",
- cmd_len, ret);
- } else if (data_len != 0) {
- ret = spi_xfer(spi, data_len * 8, data, NULL, SPI_XFER_END);
+ debug("SF: unable to claim SPI bus\n");
+ return ret;
+ }
+
+ cmd[0] = CMD_PAGE_PROGRAM;
+ for (actual = 0; actual < len; actual += chunk_len) {
+ chunk_len = min(len - actual, page_size - byte_addr);
+
+ cmd[1] = page_addr >> 8;
+ cmd[2] = page_addr;
+ cmd[3] = byte_addr;
+
+ debug("PP: 0x%p => cmd = { 0x%02x 0x%02x%02x%02x } chunk_len = %zu\n",
+ buf + actual, cmd[0], cmd[1], cmd[2], cmd[3], chunk_len);
+
+ ret = spi_flash_cmd_write_enable(flash);
+ if (ret < 0) {
+ debug("SF: enabling write failed\n");
+ break;
+ }
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, 4,
+ buf + actual, chunk_len);
+ if (ret < 0) {
+ debug("SF: write failed\n");
+ break;
+ }
+
+ ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT);
if (ret)
- debug("SF: Failed to read %zu bytes of data: %d\n",
- data_len, ret);
+ break;
+
+ page_addr++;
+ byte_addr = 0;
}
+ debug("SF: program %s %zu bytes @ %#x\n",
+ ret ? "failure" : "success", len, offset);
+
+ spi_release_bus(flash->spi);
return ret;
}
-
int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
size_t cmd_len, void *data, size_t data_len)
{
return ret;
}
+int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
+ size_t len, void *data)
+{
+ u8 cmd[5];
+
+ cmd[0] = CMD_READ_ARRAY_FAST;
+ spi_flash_addr(offset, cmd);
+ cmd[4] = 0x00;
+
+ return spi_flash_read_common(flash, cmd, sizeof(cmd), data, len);
+}
+
+int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
+ u8 cmd, u8 poll_bit)
+{
+ struct spi_slave *spi = flash->spi;
+ unsigned long timebase;
+ int ret;
+ u8 status;
+
+ ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
+ if (ret) {
+ debug("SF: Failed to send command %02x: %d\n", cmd, ret);
+ return ret;
+ }
+
+ timebase = get_timer(0);
+ do {
+ WATCHDOG_RESET();
+
+ ret = spi_xfer(spi, 8, NULL, &status, 0);
+ if (ret)
+ return -1;
+
+ if ((status & poll_bit) == 0)
+ break;
+
+ } while (get_timer(timebase) < timeout);
+
+ spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
+
+ if ((status & poll_bit) == 0)
+ return 0;
+
+ /* Timed out */
+ debug("SF: time out!\n");
+ return -1;
+}
+
+int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
+{
+ return spi_flash_cmd_poll_bit(flash, timeout,
+ CMD_READ_STATUS, STATUS_WIP);
+}
+
+int spi_flash_cmd_erase(struct spi_flash *flash, u8 erase_cmd,
+ u32 offset, size_t len)
+{
+ u32 start, end, erase_size;
+ int ret;
+ u8 cmd[4];
+
+ erase_size = flash->sector_size;
+ if (offset % erase_size || len % erase_size) {
+ debug("SF: Erase offset/length not multiple of erase size\n");
+ return -1;
+ }
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: Unable to claim SPI bus\n");
+ return ret;
+ }
+
+ cmd[0] = erase_cmd;
+ start = offset;
+ end = start + len;
+
+ while (offset < end) {
+ spi_flash_addr(offset, cmd);
+ offset += erase_size;
+
+ debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
+ cmd[2], cmd[3], offset);
+
+ ret = spi_flash_cmd_write_enable(flash);
+ if (ret)
+ goto out;
+
+ ret = spi_flash_cmd_write(flash->spi, cmd, sizeof(cmd), NULL, 0);
+ if (ret)
+ goto out;
+
+ ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PAGE_ERASE_TIMEOUT);
+ if (ret)
+ goto out;
+ }
+
+ debug("SF: Successfully erased %zu bytes @ %#x\n", len, start);
+
+ out:
+ spi_release_bus(flash->spi);
+ return ret;
+}
+
+/*
+ * The following table holds all device probe functions
+ *
+ * shift: number of continuation bytes before the ID
+ * idcode: the expected IDCODE or 0xff for non JEDEC devices
+ * probe: the function to call
+ *
+ * Non JEDEC devices should be ordered in the table such that
+ * the probe functions with best detection algorithms come first.
+ *
+ * Several matching entries are permitted, they will be tried
+ * in sequence until a probe function returns non NULL.
+ *
+ * IDCODE_CONT_LEN may be redefined if a device needs to declare a
+ * larger "shift" value. IDCODE_PART_LEN generally shouldn't be
+ * changed. This is the max number of bytes probe functions may
+ * examine when looking up part-specific identification info.
+ *
+ * Probe functions will be given the idcode buffer starting at their
+ * manu id byte (the "idcode" in the table below). In other words,
+ * all of the continuation bytes will be skipped (the "shift" below).
+ */
+#define IDCODE_CONT_LEN 0
+#define IDCODE_PART_LEN 5
+static const struct {
+ const u8 shift;
+ const u8 idcode;
+ struct spi_flash *(*probe) (struct spi_slave *spi, u8 *idcode);
+} flashes[] = {
+ /* Keep it sorted by define name */
+#ifdef CONFIG_SPI_FLASH_ATMEL
+ { 0, 0x1f, spi_flash_probe_atmel, },
+#endif
+#ifdef CONFIG_SPI_FLASH_EON
+ { 0, 0x1c, spi_flash_probe_eon, },
+#endif
+#ifdef CONFIG_SPI_FLASH_MACRONIX
+ { 0, 0xc2, spi_flash_probe_macronix, },
+#endif
+#ifdef CONFIG_SPI_FLASH_SPANSION
+ { 0, 0x01, spi_flash_probe_spansion, },
+#endif
+#ifdef CONFIG_SPI_FLASH_SST
+ { 0, 0xbf, spi_flash_probe_sst, },
+#endif
+#ifdef CONFIG_SPI_FLASH_STMICRO
+ { 0, 0x20, spi_flash_probe_stmicro, },
+#endif
+#ifdef CONFIG_SPI_FLASH_WINBOND
+ { 0, 0xef, spi_flash_probe_winbond, },
+#endif
+#ifdef CONFIG_SPI_FRAM_RAMTRON
+ { 6, 0xc2, spi_fram_probe_ramtron, },
+# undef IDCODE_CONT_LEN
+# define IDCODE_CONT_LEN 6
+#endif
+ /* Keep it sorted by best detection */
+#ifdef CONFIG_SPI_FLASH_STMICRO
+ { 0, 0xff, spi_flash_probe_stmicro, },
+#endif
+#ifdef CONFIG_SPI_FRAM_RAMTRON_NON_JEDEC
+ { 0, 0xff, spi_fram_probe_ramtron, },
+#endif
+};
+#define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN)
+
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode)
{
struct spi_slave *spi;
- struct spi_flash *flash;
- int ret;
- u8 idcode[3];
+ struct spi_flash *flash = NULL;
+ int ret, i, shift;
+ u8 idcode[IDCODE_LEN], *idp;
spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
if (!spi) {
- debug("SF: Failed to set up slave\n");
+ printf("SF: Failed to set up slave\n");
return NULL;
}
}
/* Read the ID codes */
- ret = spi_flash_cmd(spi, CMD_READ_ID, &idcode, sizeof(idcode));
+ ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
if (ret)
goto err_read_id;
- debug("SF: Got idcode %02x %02x %02x\n", idcode[0],
- idcode[1], idcode[2]);
-
- switch (idcode[0]) {
-#ifdef CONFIG_SPI_FLASH_SPANSION
- case 0x01:
- flash = spi_flash_probe_spansion(spi, idcode);
- break;
-#endif
-#ifdef CONFIG_SPI_FLASH_ATMEL
- case 0x1F:
- flash = spi_flash_probe_atmel(spi, idcode);
- break;
-#endif
-#ifdef CONFIG_SPI_FLASH_STMICRO
- case 0x20:
- flash = spi_flash_probe_stmicro(spi, idcode);
- break;
+#ifdef DEBUG
+ printf("SF: Got idcodes\n");
+ print_buffer(0, idcode, 1, sizeof(idcode), 0);
#endif
- default:
- debug("SF: Unsupported manufacturer %02X\n", idcode[0]);
- flash = NULL;
- break;
- }
- if (!flash)
+ /* count the number of continuation bytes */
+ for (shift = 0, idp = idcode;
+ shift < IDCODE_CONT_LEN && *idp == 0x7f;
+ ++shift, ++idp)
+ continue;
+
+ /* search the table for matches in shift and id */
+ for (i = 0; i < ARRAY_SIZE(flashes); ++i)
+ if (flashes[i].shift == shift && flashes[i].idcode == *idp) {
+ /* we have a match, call probe */
+ flash = flashes[i].probe(spi, idp);
+ if (flash)
+ break;
+ }
+
+ if (!flash) {
+ printf("SF: Unsupported manufacturer %02x\n", *idp);
goto err_manufacturer_probe;
+ }
+
+ printf("SF: Detected %s with page size ", flash->name);
+ print_size(flash->sector_size, ", total ");
+ print_size(flash->size, "\n");
spi_release_bus(spi);
projects / karo-tx-uboot.git / blobdiff