Christopher Douglass (cdouglass.orion@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5225
-gerrit
commit 18a3a4cc76eafbc43c1eb182cbea8652a038f5df Author: Chris Douglass cdouglass.orion@gmail.com Date: Fri Feb 14 13:51:26 2014 -0500
drivers/spi: Add support for adesto SPI flash parts
Adds support for the following Adesto Technologies SPI Flash parts.
AT25DF081 AT25DF321 AT25DF641
It has been tested on an Orion VPX7654 board populated with an AT25DF321A part. The "08" and "64" densities have not been tested.
These parts are the successors of the Atmel AT26DF line that was spun out or purchased by Adesto.
In this patch, adesto.c is identical to winbond.c with part entries for the Adesto parts. The datasheet for the AT25DF parts includes a "100MHz" programming command in addition to the "85MHz" command that is currently used but this patch does not add support for that enhanced programming mode.
Change-Id: If82d075fd9000030480c412c645dcae2c8bb7439 Signed-off-by: Christopher Douglass cdouglass.orion@gmail.com --- src/drivers/spi/Kconfig | 9 ++ src/drivers/spi/adesto.c | 198 +++++++++++++++++++++++++++++++++++ src/drivers/spi/spi_flash.c | 4 + src/drivers/spi/spi_flash_internal.h | 1 + 4 files changed, 212 insertions(+)
diff --git a/src/drivers/spi/Kconfig b/src/drivers/spi/Kconfig index a99199a..4efa909 100644 --- a/src/drivers/spi/Kconfig +++ b/src/drivers/spi/Kconfig @@ -94,3 +94,12 @@ config SPI_FLASH_GIGADEVICE help Select this option if your chipset driver needs to store certain data in the SPI flash and your SPI flash is made by Gigadevice. + +config SPI_FLASH_ADESTO + bool + default y + depends on SPI_FLASH + help + Select this option if your chipset driver needs to store certain + data in the SPI flash and your SPI flash is made by Adesto Technologies. + diff --git a/src/drivers/spi/adesto.c b/src/drivers/spi/adesto.c new file mode 100644 index 0000000..b008e85 --- /dev/null +++ b/src/drivers/spi/adesto.c @@ -0,0 +1,198 @@ +/* + * adesto.c + * Driver for Adesto Technologies SPI flash + * Copyright 2014 Orion Technologies, LLC + * Author: Chris Douglass <cdouglass <at> oriontechnologies.com> + * + * based on adesto.c + * + * Copyright 2008, Network Appliance Inc. + * Author: Jason McMullan <mcmullan <at> netapp.com> + * Licensed under the GPL-2 or later. + */ + +#include <stdlib.h> +#include <spi_flash.h> +#include "spi_flash_internal.h" + +/* at25dfxx-specific commands */ +#define CMD_AT25DF_WREN 0x06 /* Write Enable */ +#define CMD_AT25DF_WRDI 0x04 /* Write Disable */ +#define CMD_AT25DF_RDSR 0x05 /* Read Status Register */ +#define CMD_AT25DF_WRSR 0x01 /* Write Status Register */ +#define CMD_AT25DF_READ 0x03 /* Read Data Bytes */ +#define CMD_AT25DF_FAST_READ 0x0b /* Read Data Bytes at Higher Speed */ +#define CMD_AT25DF_PP 0x02 /* Page Program */ +#define CMD_AT25DF_SE 0x20 /* Sector (4K) Erase */ +#define CMD_AT25DF_BE 0xd8 /* Block (64K) Erase */ +#define CMD_AT25DF_CE 0xc7 /* Chip Erase */ +#define CMD_AT25DF_DP 0xb9 /* Deep Power-down */ +#define CMD_AT25DF_RES 0xab /* Release from DP, and Read Signature */ + +struct adesto_spi_flash_params { + uint16_t id; + /* Log2 of page size in power-of-two mode */ + uint8_t l2_page_size; + uint16_t pages_per_sector; + uint16_t sectors_per_block; + uint16_t nr_blocks; + const char *name; +}; + +/* spi_flash needs to be first so upper layers can free() it */ +struct adesto_spi_flash { + struct spi_flash flash; + const struct adesto_spi_flash_params *params; +}; + +static inline struct adesto_spi_flash * +to_adesto_spi_flash(struct spi_flash *flash) +{ + return container_of(flash, struct adesto_spi_flash, flash); +} + +static const struct adesto_spi_flash_params adesto_spi_flash_table[] = { + { + .id = 0x4501, + .l2_page_size = 8, + .pages_per_sector = 16, + .sectors_per_block = 16, + .nr_blocks = 16, + .name = "AT25DF081", + }, + { + .id = 0x4701, + .l2_page_size = 8, + .pages_per_sector = 16, + .sectors_per_block = 16, + .nr_blocks = 64, + .name = "AT25DF321", + }, + { + .id = 0x4800, + .l2_page_size = 8, + .pages_per_sector = 16, + .sectors_per_block = 16, + .nr_blocks = 128, + .name = "AT25DF641", + }, +}; + +static int adesto_write(struct spi_flash *flash, + u32 offset, size_t len, const void *buf) +{ + struct adesto_spi_flash *stm = to_adesto_spi_flash(flash); + unsigned long byte_addr; + unsigned long page_size; + size_t chunk_len; + size_t actual; + int ret; + u8 cmd[4]; + + page_size = min(1 << stm->params->l2_page_size, CONTROLLER_PAGE_LIMIT); + byte_addr = offset % page_size; + + flash->spi->rw = SPI_WRITE_FLAG; + ret = spi_claim_bus(flash->spi); + if (ret) { + printk(BIOS_WARNING, "SF: Unable to claim SPI bus\n"); + return ret; + } + + for (actual = 0; actual < len; actual += chunk_len) { + chunk_len = min(len - actual, page_size - byte_addr); + + cmd[0] = CMD_AT25DF_PP; + cmd[1] = (offset >> 16) & 0xff; + cmd[2] = (offset >> 8) & 0xff; + cmd[3] = offset & 0xff; +#if CONFIG_DEBUG_SPI_FLASH + printk(BIOS_SPEW, "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); +#endif + + ret = spi_flash_cmd(flash->spi, CMD_AT25DF_WREN, NULL, 0); + if (ret < 0) { + printk(BIOS_WARNING, "SF: Enabling Write failed\n"); + goto out; + } + + ret = spi_flash_cmd_write(flash->spi, cmd, 4, + buf + actual, chunk_len); + if (ret < 0) { + printk(BIOS_WARNING, "SF: adesto Page Program failed\n"); + goto out; + } + + ret = spi_flash_cmd_wait_ready(flash, SPI_FLASH_PROG_TIMEOUT); + if (ret) + goto out; + + offset += chunk_len; + byte_addr = 0; + } + +#if CONFIG_DEBUG_SPI_FLASH + printk(BIOS_SPEW, "SF: adesto: Successfully programmed %zu bytes @" + " 0x%lx\n", len, (unsigned long)(offset - len)); +#endif + ret = 0; + +out: + spi_release_bus(flash->spi); + return ret; +} + +static int adesto_erase(struct spi_flash *flash, u32 offset, size_t len) +{ + return spi_flash_cmd_erase(flash, CMD_AT25DF_SE, offset, len); +} + +struct spi_flash *spi_flash_probe_adesto(struct spi_slave *spi, u8 *idcode) +{ + const struct adesto_spi_flash_params *params; + unsigned page_size; + struct adesto_spi_flash *stm; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(adesto_spi_flash_table); i++) { + params = &adesto_spi_flash_table[i]; + if (params->id == ((idcode[1] << 8) | idcode[2])) + break; + } + + if (i == ARRAY_SIZE(adesto_spi_flash_table)) { + printk(BIOS_WARNING, "SF: Unsupported adesto ID %02x%02x\n", + idcode[1], idcode[2]); + return NULL; + } + + stm = malloc(sizeof(struct adesto_spi_flash)); + if (!stm) { + printk(BIOS_WARNING, "SF: Failed to allocate memory\n"); + return NULL; + } + + stm->params = params; + stm->flash.spi = spi; + stm->flash.name = params->name; + + /* Assuming power-of-two page size initially. */ + page_size = 1 << params->l2_page_size; + + stm->flash.write = adesto_write; + stm->flash.erase = adesto_erase; +#if CONFIG_SPI_FLASH_NO_FAST_READ + stm->flash.read = spi_flash_cmd_read_slow; +#else + stm->flash.read = spi_flash_cmd_read_fast; +#endif + stm->flash.sector_size = (1 << stm->params->l2_page_size) * + stm->params->pages_per_sector; + stm->flash.size = page_size * params->pages_per_sector + * params->sectors_per_block + * params->nr_blocks; + + return &stm->flash; +} diff --git a/src/drivers/spi/spi_flash.c b/src/drivers/spi/spi_flash.c index ada4f3a..6e28d08 100644 --- a/src/drivers/spi/spi_flash.c +++ b/src/drivers/spi/spi_flash.c @@ -243,6 +243,10 @@ static struct { #if CONFIG_SPI_FLASH_STMICRO { 0, 0xff, spi_flash_probe_stmicro, }, #endif + +#if CONFIG_SPI_FLASH_ADESTO + { 0, 0x1f, spi_flash_probe_adesto, }, +#endif }; #define IDCODE_LEN (IDCODE_CONT_LEN + IDCODE_PART_LEN)
diff --git a/src/drivers/spi/spi_flash_internal.h b/src/drivers/spi/spi_flash_internal.h index 37ffee6..fe4a51f 100644 --- a/src/drivers/spi/spi_flash_internal.h +++ b/src/drivers/spi/spi_flash_internal.h @@ -80,4 +80,5 @@ struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode); struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode); struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode); +struct spi_flash *spi_flash_probe_adesto(struct spi_slave *spi, u8 *idcode); struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode);