[U-Boot] [PATCH 01/12] sf: Divide spi_flash into multiple parts
Jagannadha Sutradharudu Teki
jagannadha.sutradharudu-teki at xilinx.com
Sun Aug 4 23:20:24 CEST 2013
Divided the spi_flash framework into mutiple parts for
- spi_flash.c:
spi flash core file, interaction for spi/qspi driver to
spi_flash framework.
- spi_flash_ops.c
spi flash preffered operations, erase,write and read.
- spi_flash_probe.c
spi flash probing, easy to extend probing functionality.
This change will support to extend the functionality in a
proper manner.
Signed-off-by: Jagannadha Sutradharudu Teki <jaganna at xilinx.com>
---
drivers/mtd/spi/Makefile | 2 +-
drivers/mtd/spi/spi_flash.c | 569 +-------------------------------------
drivers/mtd/spi/spi_flash_ops.c | 314 +++++++++++++++++++++
drivers/mtd/spi/spi_flash_probe.c | 274 ++++++++++++++++++
4 files changed, 594 insertions(+), 565 deletions(-)
create mode 100644 drivers/mtd/spi/spi_flash_ops.c
create mode 100644 drivers/mtd/spi/spi_flash_probe.c
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index e537fcf..0304b12 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -13,7 +13,7 @@ ifdef CONFIG_SPL_BUILD
COBJS-$(CONFIG_SPL_SPI_LOAD) += spi_spl_load.o
endif
-COBJS-$(CONFIG_SPI_FLASH) += spi_flash.o
+COBJS-$(CONFIG_SPI_FLASH) += spi_flash_probe.o spi_flash_ops.o spi_flash.o
COBJS-$(CONFIG_SPI_FLASH_ATMEL) += atmel.o
COBJS-$(CONFIG_SPI_FLASH_EON) += eon.o
COBJS-$(CONFIG_SPI_FLASH_GIGADEVICE) += gigadevice.o
diff --git a/drivers/mtd/spi/spi_flash.c b/drivers/mtd/spi/spi_flash.c
index 9814395..ddbdda0 100644
--- a/drivers/mtd/spi/spi_flash.c
+++ b/drivers/mtd/spi/spi_flash.c
@@ -8,23 +8,7 @@
*/
#include <common.h>
-#include <fdtdec.h>
-#include <malloc.h>
#include <spi.h>
-#include <spi_flash.h>
-#include <watchdog.h>
-
-#include "spi_flash_internal.h"
-
-DECLARE_GLOBAL_DATA_PTR;
-
-static void spi_flash_addr(u32 addr, u8 *cmd)
-{
- /* cmd[0] is actual command */
- cmd[1] = addr >> 16;
- cmd[2] = addr >> 8;
- cmd[3] = addr >> 0;
-}
static int spi_flash_read_write(struct spi_slave *spi,
const u8 *cmd, size_t cmd_len,
@@ -52,562 +36,19 @@ static int spi_flash_read_write(struct spi_slave *spi,
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)
-{
- return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
-}
-
-int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
-{
- struct spi_slave *spi = flash->spi;
- unsigned long timebase;
- int ret;
- u8 status;
- u8 check_status = 0x0;
- u8 poll_bit = STATUS_WIP;
- u8 cmd = flash->poll_cmd;
-
- if (cmd == CMD_FLAG_STATUS) {
- poll_bit = STATUS_PEC;
- check_status = poll_bit;
- }
-
- ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
- if (ret) {
- debug("SF: fail to read %s status register\n",
- cmd == CMD_READ_STATUS ? "read" : "flag");
- 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) == check_status)
- break;
-
- } while (get_timer(timebase) < timeout);
-
- spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
-
- if ((status & poll_bit) == check_status)
- return 0;
-
- /* Timed out */
- debug("SF: time out!\n");
- return -1;
-}
-
-int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
- size_t cmd_len, const void *buf, size_t buf_len)
-{
- struct spi_slave *spi = flash->spi;
- unsigned long timeout = SPI_FLASH_PROG_TIMEOUT;
- int ret;
-
- if (buf == NULL)
- timeout = SPI_FLASH_PAGE_ERASE_TIMEOUT;
-
- ret = spi_claim_bus(flash->spi);
- if (ret) {
- debug("SF: unable to claim SPI bus\n");
- return ret;
- }
-
- ret = spi_flash_cmd_write_enable(flash);
- if (ret < 0) {
- debug("SF: enabling write failed\n");
- return ret;
- }
-
- ret = spi_flash_cmd_write(spi, cmd, cmd_len, buf, buf_len);
- if (ret < 0) {
- debug("SF: write cmd failed\n");
- return ret;
- }
-
- ret = spi_flash_cmd_wait_ready(flash, timeout);
- if (ret < 0) {
- debug("SF: write %s timed out\n",
- timeout == SPI_FLASH_PROG_TIMEOUT ?
- "program" : "page erase");
- return ret;
- }
-
- spi_release_bus(spi);
-
- return ret;
-}
-
-int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
-{
- u32 erase_size;
- u8 cmd[4];
- int ret = -1;
-
- 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;
- }
-
- if (erase_size == 4096)
- cmd[0] = CMD_ERASE_4K;
- else
- cmd[0] = CMD_ERASE_64K;
-
- while (len) {
-#ifdef CONFIG_SPI_FLASH_BAR
- u8 bank_sel;
-
- bank_sel = offset / SPI_FLASH_16MB_BOUN;
-
- ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
- if (ret) {
- debug("SF: fail to set bank%d\n", bank_sel);
- return ret;
- }
-#endif
- spi_flash_addr(offset, cmd);
-
- debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
- cmd[2], cmd[3], offset);
-
- ret = spi_flash_write_common(flash, cmd, sizeof(cmd), NULL, 0);
- if (ret < 0) {
- debug("SF: erase failed\n");
- break;
- }
-
- offset += erase_size;
- len -= erase_size;
- }
-
- return ret;
-}
-
-int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
- size_t len, const void *buf)
-{
- unsigned long byte_addr, page_size;
- size_t chunk_len, actual;
- u8 cmd[4];
- int ret = -1;
-
- page_size = flash->page_size;
-
- cmd[0] = CMD_PAGE_PROGRAM;
- for (actual = 0; actual < len; actual += chunk_len) {
-#ifdef CONFIG_SPI_FLASH_BAR
- u8 bank_sel;
-
- bank_sel = offset / SPI_FLASH_16MB_BOUN;
-
- ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
- if (ret) {
- debug("SF: fail to set bank%d\n", bank_sel);
- return ret;
- }
-#endif
- byte_addr = offset % page_size;
- chunk_len = min(len - actual, page_size - byte_addr);
-
- if (flash->spi->max_write_size)
- chunk_len = min(chunk_len, flash->spi->max_write_size);
-
- spi_flash_addr(offset, cmd);
-
- 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_write_common(flash, cmd, sizeof(cmd),
- buf + actual, chunk_len);
- if (ret < 0) {
- debug("SF: write failed\n");
- break;
- }
-
- offset += chunk_len;
- }
-
- return ret;
-}
-
-int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
- size_t cmd_len, void *data, size_t data_len)
-{
- struct spi_slave *spi = flash->spi;
- int ret;
-
- ret = spi_claim_bus(flash->spi);
- if (ret) {
- debug("SF: unable to claim SPI bus\n");
- return ret;
- }
-
- ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len);
- if (ret < 0) {
- debug("SF: read cmd failed\n");
- return ret;
- }
-
- spi_release_bus(spi);
-
- return ret;
-}
-
-int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
- size_t len, void *data)
-{
- u8 cmd[5], bank_sel = 0;
- u32 remain_len, read_len;
- int ret = -1;
-
- /* Handle memory-mapped SPI */
- if (flash->memory_map) {
- memcpy(data, flash->memory_map + offset, len);
- return 0;
- }
-
- cmd[0] = CMD_READ_ARRAY_FAST;
- cmd[4] = 0x00;
-
- while (len) {
-#ifdef CONFIG_SPI_FLASH_BAR
- bank_sel = offset / SPI_FLASH_16MB_BOUN;
-
- ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
- if (ret) {
- debug("SF: fail to set bank%d\n", bank_sel);
- return ret;
- }
-#endif
- remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1) - offset);
- if (len < remain_len)
- read_len = len;
- else
- read_len = remain_len;
-
- spi_flash_addr(offset, cmd);
-
- ret = spi_flash_read_common(flash, cmd, sizeof(cmd),
- data, read_len);
- if (ret < 0) {
- debug("SF: read failed\n");
- break;
- }
-
- offset += read_len;
- len -= read_len;
- data += read_len;
- }
-
- return ret;
-}
-
-int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
-{
- u8 cmd;
- int ret;
-
- cmd = CMD_WRITE_STATUS;
- ret = spi_flash_write_common(flash, &cmd, 1, &sr, 1);
- if (ret < 0) {
- debug("SF: fail to write status register\n");
- return ret;
- }
-
- return 0;
-}
-
-#ifdef CONFIG_SPI_FLASH_BAR
-int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel)
-{
- u8 cmd;
- int ret;
-
- if (flash->bank_curr == bank_sel) {
- debug("SF: not require to enable bank%d\n", bank_sel);
- return 0;
- }
-
- cmd = flash->bank_write_cmd;
- ret = spi_flash_write_common(flash, &cmd, 1, &bank_sel, 1);
- if (ret < 0) {
- debug("SF: fail to write bank register\n");
- return ret;
- }
- flash->bank_curr = bank_sel;
-
- return 0;
-}
-
-int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
-{
- u8 cmd;
- u8 curr_bank = 0;
-
- /* discover bank cmds */
- switch (idcode0) {
- case SPI_FLASH_SPANSION_IDCODE0:
- flash->bank_read_cmd = CMD_BANKADDR_BRRD;
- flash->bank_write_cmd = CMD_BANKADDR_BRWR;
- break;
- case SPI_FLASH_STMICRO_IDCODE0:
- case SPI_FLASH_WINBOND_IDCODE0:
- flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
- flash->bank_write_cmd = CMD_EXTNADDR_WREAR;
- break;
- default:
- printf("SF: Unsupported bank commands %02x\n", idcode0);
- return -1;
- }
-
- /* read the bank reg - on which bank the flash is in currently */
- cmd = flash->bank_read_cmd;
- if (flash->size > SPI_FLASH_16MB_BOUN) {
- if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) {
- debug("SF: fail to read bank addr register\n");
- return -1;
- }
- flash->bank_curr = curr_bank;
- } else {
- flash->bank_curr = curr_bank;
- }
-
- return 0;
-}
-#endif
-
-#ifdef CONFIG_OF_CONTROL
-int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
-{
- fdt_addr_t addr;
- fdt_size_t size;
- int node;
-
- /* If there is no node, do nothing */
- node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
- if (node < 0)
- return 0;
-
- addr = fdtdec_get_addr_size(blob, node, "memory-map", &size);
- if (addr == FDT_ADDR_T_NONE) {
- debug("%s: Cannot decode address\n", __func__);
- return 0;
- }
-
- if (flash->size != size) {
- debug("%s: Memory map must cover entire device\n", __func__);
- return -1;
- }
- flash->memory_map = (void *)addr;
-
- return 0;
-}
-#endif /* CONFIG_OF_CONTROL */
-
-/*
- * 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_GIGADEVICE
- { 0, 0xc8, spi_flash_probe_gigadevice, },
-#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 = NULL;
- int ret, i, shift;
- u8 idcode[IDCODE_LEN], *idp;
-
- spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
- if (!spi) {
- printf("SF: Failed to set up slave\n");
- return NULL;
- }
-
- ret = spi_claim_bus(spi);
- if (ret) {
- debug("SF: Failed to claim SPI bus: %d\n", ret);
- goto err_claim_bus;
- }
-
- /* Read the ID codes */
- ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
- if (ret)
- goto err_read_id;
-
-#ifdef DEBUG
- printf("SF: Got idcodes\n");
- print_buffer(0, idcode, 1, sizeof(idcode), 0);
-#endif
-
- /* 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;
- }
-
-#ifdef CONFIG_SPI_FLASH_BAR
- /* Configure the BAR - disover bank cmds and read current bank */
- ret = spi_flash_bank_config(flash, *idp);
- if (ret < 0)
- goto err_manufacturer_probe;
-#endif
-
-#ifdef CONFIG_OF_CONTROL
- if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
- debug("SF: FDT decode error\n");
- goto err_manufacturer_probe;
- }
-#endif
- printf("SF: Detected %s with page size ", flash->name);
- print_size(flash->sector_size, ", total ");
- print_size(flash->size, "");
- if (flash->memory_map)
- printf(", mapped at %p", flash->memory_map);
- puts("\n");
-#ifndef CONFIG_SPI_FLASH_BAR
- if (flash->size > SPI_FLASH_16MB_BOUN) {
- puts("SF: Warning - Only lower 16MiB accessible,");
- puts(" Full access #define CONFIG_SPI_FLASH_BAR\n");
- }
-#endif
-
- spi_release_bus(spi);
-
- return flash;
-
-err_manufacturer_probe:
-err_read_id:
- spi_release_bus(spi);
-err_claim_bus:
- spi_free_slave(spi);
- return NULL;
-}
-
-void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi,
- const char *name)
+int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
{
- struct spi_flash *flash;
- void *ptr;
-
- ptr = malloc(size);
- if (!ptr) {
- debug("SF: Failed to allocate memory\n");
- return NULL;
- }
- memset(ptr, '\0', size);
- flash = (struct spi_flash *)(ptr + offset);
-
- /* Set up some basic fields - caller will sort out sizes */
- flash->spi = spi;
- flash->name = name;
- flash->poll_cmd = CMD_READ_STATUS;
-
- flash->read = spi_flash_cmd_read_fast;
- flash->write = spi_flash_cmd_write_multi;
- flash->erase = spi_flash_cmd_erase;
-
- return flash;
+ return spi_flash_cmd_read(spi, &cmd, 1, response, len);
}
-void spi_flash_free(struct spi_flash *flash)
+int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
+ const void *data, size_t data_len)
{
- spi_free_slave(flash->spi);
- free(flash);
+ return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);
}
diff --git a/drivers/mtd/spi/spi_flash_ops.c b/drivers/mtd/spi/spi_flash_ops.c
new file mode 100644
index 0000000..1538bf3
--- /dev/null
+++ b/drivers/mtd/spi/spi_flash_ops.c
@@ -0,0 +1,314 @@
+/*
+ * SPI flash operations
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
+ * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <spi.h>
+#include <spi_flash.h>
+#include <watchdog.h>
+
+#include "spi_flash_internal.h"
+
+static void spi_flash_addr(u32 addr, u8 *cmd)
+{
+ /* cmd[0] is actual command */
+ cmd[1] = addr >> 16;
+ cmd[2] = addr >> 8;
+ cmd[3] = addr >> 0;
+}
+
+int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout)
+{
+ struct spi_slave *spi = flash->spi;
+ unsigned long timebase;
+ int ret;
+ u8 status;
+ u8 check_status = 0x0;
+ u8 poll_bit = STATUS_WIP;
+ u8 cmd = flash->poll_cmd;
+
+ if (cmd == CMD_FLAG_STATUS) {
+ poll_bit = STATUS_PEC;
+ check_status = poll_bit;
+ }
+
+ ret = spi_xfer(spi, 8, &cmd, NULL, SPI_XFER_BEGIN);
+ if (ret) {
+ debug("SF: fail to read %s status register\n",
+ cmd == CMD_READ_STATUS ? "read" : "flag");
+ 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) == check_status)
+ break;
+
+ } while (get_timer(timebase) < timeout);
+
+ spi_xfer(spi, 0, NULL, NULL, SPI_XFER_END);
+
+ if ((status & poll_bit) == check_status)
+ return 0;
+
+ /* Timed out */
+ debug("SF: time out!\n");
+ return -1;
+}
+
+int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd,
+ size_t cmd_len, const void *buf, size_t buf_len)
+{
+ struct spi_slave *spi = flash->spi;
+ unsigned long timeout = SPI_FLASH_PROG_TIMEOUT;
+ int ret;
+
+ if (buf == NULL)
+ timeout = SPI_FLASH_PAGE_ERASE_TIMEOUT;
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: unable to claim SPI bus\n");
+ return ret;
+ }
+
+ ret = spi_flash_cmd_write_enable(flash);
+ if (ret < 0) {
+ debug("SF: enabling write failed\n");
+ return ret;
+ }
+
+ ret = spi_flash_cmd_write(spi, cmd, cmd_len, buf, buf_len);
+ if (ret < 0) {
+ debug("SF: write cmd failed\n");
+ return ret;
+ }
+
+ ret = spi_flash_cmd_wait_ready(flash, timeout);
+ if (ret < 0) {
+ debug("SF: write %s timed out\n",
+ timeout == SPI_FLASH_PROG_TIMEOUT ?
+ "program" : "page erase");
+ return ret;
+ }
+
+ spi_release_bus(spi);
+
+ return ret;
+}
+
+int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len)
+{
+ u32 erase_size;
+ u8 cmd[4];
+ int ret = -1;
+
+ 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;
+ }
+
+ if (erase_size == 4096)
+ cmd[0] = CMD_ERASE_4K;
+ else
+ cmd[0] = CMD_ERASE_64K;
+
+ while (len) {
+#ifdef CONFIG_SPI_FLASH_BAR
+ u8 bank_sel;
+
+ bank_sel = offset / SPI_FLASH_16MB_BOUN;
+
+ ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
+ if (ret) {
+ debug("SF: fail to set bank%d\n", bank_sel);
+ return ret;
+ }
+#endif
+ spi_flash_addr(offset, cmd);
+
+ debug("SF: erase %2x %2x %2x %2x (%x)\n", cmd[0], cmd[1],
+ cmd[2], cmd[3], offset);
+
+ ret = spi_flash_write_common(flash, cmd, sizeof(cmd), NULL, 0);
+ if (ret < 0) {
+ debug("SF: erase failed\n");
+ break;
+ }
+
+ offset += erase_size;
+ len -= erase_size;
+ }
+
+ return ret;
+}
+
+int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset,
+ size_t len, const void *buf)
+{
+ unsigned long byte_addr, page_size;
+ size_t chunk_len, actual;
+ u8 cmd[4];
+ int ret = -1;
+
+ page_size = flash->page_size;
+
+ cmd[0] = CMD_PAGE_PROGRAM;
+ for (actual = 0; actual < len; actual += chunk_len) {
+#ifdef CONFIG_SPI_FLASH_BAR
+ u8 bank_sel;
+
+ bank_sel = offset / SPI_FLASH_16MB_BOUN;
+
+ ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
+ if (ret) {
+ debug("SF: fail to set bank%d\n", bank_sel);
+ return ret;
+ }
+#endif
+ byte_addr = offset % page_size;
+ chunk_len = min(len - actual, page_size - byte_addr);
+
+ if (flash->spi->max_write_size)
+ chunk_len = min(chunk_len, flash->spi->max_write_size);
+
+ spi_flash_addr(offset, cmd);
+
+ 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_write_common(flash, cmd, sizeof(cmd),
+ buf + actual, chunk_len);
+ if (ret < 0) {
+ debug("SF: write failed\n");
+ break;
+ }
+
+ offset += chunk_len;
+ }
+
+ return ret;
+}
+
+int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
+ size_t cmd_len, void *data, size_t data_len)
+{
+ struct spi_slave *spi = flash->spi;
+ int ret;
+
+ ret = spi_claim_bus(flash->spi);
+ if (ret) {
+ debug("SF: unable to claim SPI bus\n");
+ return ret;
+ }
+
+ ret = spi_flash_cmd_read(spi, cmd, cmd_len, data, data_len);
+ if (ret < 0) {
+ debug("SF: read cmd failed\n");
+ return ret;
+ }
+
+ spi_release_bus(spi);
+
+ return ret;
+}
+
+int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
+ size_t len, void *data)
+{
+ u8 cmd[5], bank_sel = 0;
+ u32 remain_len, read_len;
+ int ret = -1;
+
+ /* Handle memory-mapped SPI */
+ if (flash->memory_map) {
+ memcpy(data, flash->memory_map + offset, len);
+ return 0;
+ }
+
+ cmd[0] = CMD_READ_ARRAY_FAST;
+ cmd[4] = 0x00;
+
+ while (len) {
+#ifdef CONFIG_SPI_FLASH_BAR
+ bank_sel = offset / SPI_FLASH_16MB_BOUN;
+
+ ret = spi_flash_cmd_bankaddr_write(flash, bank_sel);
+ if (ret) {
+ debug("SF: fail to set bank%d\n", bank_sel);
+ return ret;
+ }
+#endif
+ remain_len = (SPI_FLASH_16MB_BOUN * (bank_sel + 1) - offset);
+ if (len < remain_len)
+ read_len = len;
+ else
+ read_len = remain_len;
+
+ spi_flash_addr(offset, cmd);
+
+ ret = spi_flash_read_common(flash, cmd, sizeof(cmd),
+ data, read_len);
+ if (ret < 0) {
+ debug("SF: read failed\n");
+ break;
+ }
+
+ offset += read_len;
+ len -= read_len;
+ data += read_len;
+ }
+
+ return ret;
+}
+
+int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr)
+{
+ u8 cmd;
+ int ret;
+
+ cmd = CMD_WRITE_STATUS;
+ ret = spi_flash_write_common(flash, &cmd, 1, &sr, 1);
+ if (ret < 0) {
+ debug("SF: fail to write status register\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_SPI_FLASH_BAR
+int spi_flash_cmd_bankaddr_write(struct spi_flash *flash, u8 bank_sel)
+{
+ u8 cmd;
+ int ret;
+
+ if (flash->bank_curr == bank_sel) {
+ debug("SF: not require to enable bank%d\n", bank_sel);
+ return 0;
+ }
+
+ cmd = flash->bank_write_cmd;
+ ret = spi_flash_write_common(flash, &cmd, 1, &bank_sel, 1);
+ if (ret < 0) {
+ debug("SF: fail to write bank register\n");
+ return ret;
+ }
+ flash->bank_curr = bank_sel;
+
+ return 0;
+}
+#endif
diff --git a/drivers/mtd/spi/spi_flash_probe.c b/drivers/mtd/spi/spi_flash_probe.c
new file mode 100644
index 0000000..fedc81e
--- /dev/null
+++ b/drivers/mtd/spi/spi_flash_probe.c
@@ -0,0 +1,274 @@
+/*
+ * SPI flash probing
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
+ * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <common.h>
+#include <fdtdec.h>
+#include <malloc.h>
+#include <spi.h>
+#include <spi_flash.h>
+
+#include "spi_flash_internal.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifdef CONFIG_SPI_FLASH_BAR
+int spi_flash_bank_config(struct spi_flash *flash, u8 idcode0)
+{
+ u8 cmd;
+ u8 curr_bank = 0;
+
+ /* discover bank cmds */
+ switch (idcode0) {
+ case SPI_FLASH_SPANSION_IDCODE0:
+ flash->bank_read_cmd = CMD_BANKADDR_BRRD;
+ flash->bank_write_cmd = CMD_BANKADDR_BRWR;
+ break;
+ case SPI_FLASH_STMICRO_IDCODE0:
+ case SPI_FLASH_WINBOND_IDCODE0:
+ flash->bank_read_cmd = CMD_EXTNADDR_RDEAR;
+ flash->bank_write_cmd = CMD_EXTNADDR_WREAR;
+ break;
+ default:
+ printf("SF: Unsupported bank commands %02x\n", idcode0);
+ return -1;
+ }
+
+ /* read the bank reg - on which bank the flash is in currently */
+ cmd = flash->bank_read_cmd;
+ if (flash->size > SPI_FLASH_16MB_BOUN) {
+ if (spi_flash_read_common(flash, &cmd, 1, &curr_bank, 1)) {
+ debug("SF: fail to read bank addr register\n");
+ return -1;
+ }
+ flash->bank_curr = curr_bank;
+ } else {
+ flash->bank_curr = curr_bank;
+ }
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_OF_CONTROL
+int spi_flash_decode_fdt(const void *blob, struct spi_flash *flash)
+{
+ fdt_addr_t addr;
+ fdt_size_t size;
+ int node;
+
+ /* If there is no node, do nothing */
+ node = fdtdec_next_compatible(blob, 0, COMPAT_GENERIC_SPI_FLASH);
+ if (node < 0)
+ return 0;
+
+ addr = fdtdec_get_addr_size(blob, node, "memory-map", &size);
+ if (addr == FDT_ADDR_T_NONE) {
+ debug("%s: Cannot decode address\n", __func__);
+ return 0;
+ }
+
+ if (flash->size != size) {
+ debug("%s: Memory map must cover entire device\n", __func__);
+ return -1;
+ }
+ flash->memory_map = (void *)addr;
+
+ return 0;
+}
+#endif /* CONFIG_OF_CONTROL */
+
+/*
+ * 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_GIGADEVICE
+ { 0, 0xc8, spi_flash_probe_gigadevice, },
+#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 = NULL;
+ int ret, i, shift;
+ u8 idcode[IDCODE_LEN], *idp;
+
+ spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
+ if (!spi) {
+ printf("SF: Failed to set up slave\n");
+ return NULL;
+ }
+
+ ret = spi_claim_bus(spi);
+ if (ret) {
+ debug("SF: Failed to claim SPI bus: %d\n", ret);
+ goto err_claim_bus;
+ }
+
+ /* Read the ID codes */
+ ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
+ if (ret)
+ goto err_read_id;
+
+#ifdef DEBUG
+ printf("SF: Got idcodes\n");
+ print_buffer(0, idcode, 1, sizeof(idcode), 0);
+#endif
+
+ /* 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;
+ }
+
+#ifdef CONFIG_SPI_FLASH_BAR
+ /* Configure the BAR - disover bank cmds and read current bank */
+ ret = spi_flash_bank_config(flash, *idp);
+ if (ret < 0)
+ goto err_manufacturer_probe;
+#endif
+
+#ifdef CONFIG_OF_CONTROL
+ if (spi_flash_decode_fdt(gd->fdt_blob, flash)) {
+ debug("SF: FDT decode error\n");
+ goto err_manufacturer_probe;
+ }
+#endif
+ printf("SF: Detected %s with page size ", flash->name);
+ print_size(flash->sector_size, ", total ");
+ print_size(flash->size, "");
+ if (flash->memory_map)
+ printf(", mapped at %p", flash->memory_map);
+ puts("\n");
+#ifndef CONFIG_SPI_FLASH_BAR
+ if (flash->size > SPI_FLASH_16MB_BOUN) {
+ puts("SF: Warning - Only lower 16MiB accessible,");
+ puts(" Full access #define CONFIG_SPI_FLASH_BAR\n");
+ }
+#endif
+
+ spi_release_bus(spi);
+
+ return flash;
+
+err_manufacturer_probe:
+err_read_id:
+ spi_release_bus(spi);
+err_claim_bus:
+ spi_free_slave(spi);
+ return NULL;
+}
+
+void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi,
+ const char *name)
+{
+ struct spi_flash *flash;
+ void *ptr;
+
+ ptr = malloc(size);
+ if (!ptr) {
+ debug("SF: Failed to allocate memory\n");
+ return NULL;
+ }
+ memset(ptr, '\0', size);
+ flash = (struct spi_flash *)(ptr + offset);
+
+ /* Set up some basic fields - caller will sort out sizes */
+ flash->spi = spi;
+ flash->name = name;
+ flash->poll_cmd = CMD_READ_STATUS;
+
+ flash->read = spi_flash_cmd_read_fast;
+ flash->write = spi_flash_cmd_write_multi;
+ flash->erase = spi_flash_cmd_erase;
+
+ return flash;
+}
+
+void spi_flash_free(struct spi_flash *flash)
+{
+ spi_free_slave(flash->spi);
+ free(flash);
+}
--
1.8.3
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