More cleanups on spi_flash side: - Removed unneeded comments. - Rearranged macros in proper location. - Rearranged func declerations - Renamed few function names. - Added License headers.
Signed-off-by: Jagannadha Sutradharudu Teki jaganna@xilinx.com --- Changes for v5: - none Changes for v4: - none Changes for v3: - none Changes for v2: - none
drivers/mtd/spi/Makefile | 4 +- drivers/mtd/spi/spi_flash_internal.h | 119 ++++++++++++++++++++--------------- drivers/mtd/spi/spi_flash_ops.c | 6 +- drivers/mtd/spi/spi_flash_probe.c | 14 ++--- include/spi_flash.h | 16 +---- 5 files changed, 85 insertions(+), 74 deletions(-)
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile index 5678134..0fa867d 100644 --- a/drivers/mtd/spi/Makefile +++ b/drivers/mtd/spi/Makefile @@ -17,8 +17,8 @@ endif ifdef CONFIG_CMD_SF COBJS-y += spi_flash.o endif -COBJS-$(CONFIG_SPI_FLASH) += spi_flash_probe.o spi_flash_ops.o -COBJS-$(CONFIG_SPI_FRAM_RAMTRON) += ramtron.o +COBJS-$(CONFIG_SPI_FLASH) += spi_flash_probe.o spi_flash_ops.o +COBJS-$(CONFIG_SPI_FRAM_RAMTRON) += ramtron.o COBJS-$(CONFIG_SPI_M95XXX) += eeprom_m95xxx.o
COBJS := $(COBJS-y) diff --git a/drivers/mtd/spi/spi_flash_internal.h b/drivers/mtd/spi/spi_flash_internal.h index 1f9f170..29a14f4 100644 --- a/drivers/mtd/spi/spi_flash_internal.h +++ b/drivers/mtd/spi/spi_flash_internal.h @@ -2,37 +2,43 @@ * SPI flash internal definitions * * Copyright (C) 2008 Atmel Corporation + * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc. + * + * Licensed under the GPL-2 or later. */
-/* Common parameters -- kind of high, but they should only occur when there - * is a problem (and well your system already is broken), so err on the side - * of caution in case we're dealing with slower SPI buses and/or processors. - */ -#define SPI_FLASH_PROG_TIMEOUT (2 * CONFIG_SYS_HZ) -#define SPI_FLASH_PAGE_ERASE_TIMEOUT (5 * CONFIG_SYS_HZ) -#define SPI_FLASH_SECTOR_ERASE_TIMEOUT (10 * CONFIG_SYS_HZ) +#ifndef _SPI_FLASH_INTERNAL_H_ +#define _SPI_FLASH_INTERNAL_H_
-/* Common commands */ -#define CMD_READ_ID 0x9f +#define SPI_FLASH_16MB_BOUN 0x1000000
-#define CMD_READ_ARRAY_SLOW 0x03 -#define CMD_READ_ARRAY_FAST 0x0b +/* SECT flags */ +#define SECT_4K (1 << 1) +#define SECT_32K (1 << 2) +#define E_FSR (1 << 3) + +/* Erase commands */ +#define CMD_ERASE_4K 0x20 +#define CMD_ERASE_32K 0x52 +#define CMD_ERASE_CHIP 0xc7 +#define CMD_ERASE_64K 0xd8
+/* Write commands */ #define CMD_WRITE_STATUS 0x01 #define CMD_PAGE_PROGRAM 0x02 #define CMD_WRITE_DISABLE 0x04 #define CMD_READ_STATUS 0x05 -#define CMD_FLAG_STATUS 0x70 #define CMD_WRITE_ENABLE 0x06 -#define CMD_ERASE_4K 0x20 -#define CMD_ERASE_32K 0x52 -#define CMD_ERASE_64K 0xd8 -#define CMD_ERASE_CHIP 0xc7 +#define CMD_READ_CONFIG 0x35 +#define CMD_FLAG_STATUS 0x70
-#define SPI_FLASH_16MB_BOUN 0x1000000 +/* Read commands */ +#define CMD_READ_ARRAY_SLOW 0x03 +#define CMD_READ_ARRAY_FAST 0x0b +#define CMD_READ_ID 0x9f
-#ifdef CONFIG_SPI_FLASH_BAR /* Bank addr access commands */ +#ifdef CONFIG_SPI_FLASH_BAR # define CMD_BANKADDR_BRWR 0x17 # define CMD_BANKADDR_BRRD 0x16 # define CMD_EXTNADDR_WREAR 0xC5 @@ -43,6 +49,21 @@ #define STATUS_WIP 0x01 #define STATUS_PEC 0x80
+/* Flash timeout values */ +#define SPI_FLASH_PROG_TIMEOUT (2 * CONFIG_SYS_HZ) +#define SPI_FLASH_PAGE_ERASE_TIMEOUT (5 * CONFIG_SYS_HZ) +#define SPI_FLASH_SECTOR_ERASE_TIMEOUT (10 * CONFIG_SYS_HZ) + +/* SST specific */ +#ifdef CONFIG_SPI_FLASH_SST +# define SST_WP 0x01 /* Supports AAI word program */ +# define CMD_SST_BP 0x02 /* Byte Program */ +# define CMD_SST_AAI_WP 0xAD /* Auto Address Incr Word Program */ + +int sst_write_wp(struct spi_flash *flash, u32 offset, size_t len, + const void *buf); +#endif + /* Send a single-byte command to the device and read the response */ int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len);
@@ -53,9 +74,6 @@ int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len); int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, void *data, size_t data_len);
-int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, - size_t len, void *data); - /* * Send a multi-byte command to the device followed by (optional) * data. Used for programming the flash array, etc. @@ -63,43 +81,34 @@ int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len, const void *data, size_t data_len);
-/* - * Write the requested data out breaking it up into multiple write - * commands as needed per the write size. - */ -int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset, - size_t len, const void *buf);
-#ifdef CONFIG_SPI_FLASH_SST -int sst_write_wp(struct spi_flash *flash, u32 offset, size_t len, - const void *buf); -#endif +/* Flash erase(sectors) operation, support all possible erase commands */ +int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len);
-/* - * Enable writing on the SPI flash. - */ +/* Program the status register */ +int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); + +/* Set quad enbale bit */ +int spi_flash_set_qeb(struct spi_flash *flash); + +/* Enable writing on the SPI flash */ static inline int spi_flash_cmd_write_enable(struct spi_flash *flash) { return spi_flash_cmd(flash->spi, CMD_WRITE_ENABLE, NULL, 0); }
-/* - * Disable writing on the SPI flash. - */ +/* Disable writing on the SPI flash */ static inline int spi_flash_cmd_write_disable(struct spi_flash *flash) { return spi_flash_cmd(flash->spi, CMD_WRITE_DISABLE, NULL, 0); }
-/* Program the status register. */ -int spi_flash_cmd_write_status(struct spi_flash *flash, u8 sr); - /* - * Same as spi_flash_cmd_read() except it also claims/releases the SPI - * bus. Used as common part of the ->read() operation. + * Send the read status command to the device and wait for the wip + * (write-in-progress) bit to clear itself. */ -int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, - size_t cmd_len, void *data, size_t data_len); +int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout); + /* * Used for spi_flash write operation * - SPI claim @@ -112,10 +121,22 @@ int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, size_t cmd_len, const void *buf, size_t buf_len);
/* - * Send the read status command to the device and wait for the wip - * (write-in-progress) bit to clear itself. + * Flash write operation, support all possible write commands. + * Write the requested data out breaking it up into multiple write + * commands as needed per the write size. */ -int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout); +int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset, + size_t len, const void *buf); + +/* + * Same as spi_flash_cmd_read() except it also claims/releases the SPI + * bus. Used as common part of the ->read() operation. + */ +int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, + size_t cmd_len, void *data, size_t data_len); + +/* Flash read operation, support all possible read commands */ +int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset, + size_t len, void *data);
-/* Erase sectors. */ -int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len); +#endif /* _SPI_FLASH_INTERNAL_H_ */ diff --git a/drivers/mtd/spi/spi_flash_ops.c b/drivers/mtd/spi/spi_flash_ops.c index b4e1c40..882c8f5 100644 --- a/drivers/mtd/spi/spi_flash_ops.c +++ b/drivers/mtd/spi/spi_flash_ops.c @@ -147,7 +147,7 @@ int spi_flash_write_common(struct spi_flash *flash, const u8 *cmd, return ret; }
-int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len) +int spi_flash_cmd_erase_ops(struct spi_flash *flash, u32 offset, size_t len) { u32 erase_size; u8 cmd[4]; @@ -190,7 +190,7 @@ int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len) return ret; }
-int spi_flash_cmd_write_multi(struct spi_flash *flash, u32 offset, +int spi_flash_cmd_write_ops(struct spi_flash *flash, u32 offset, size_t len, const void *buf) { unsigned long byte_addr, page_size; @@ -260,7 +260,7 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd, return ret; }
-int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset, +int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset, size_t len, void *data) { u8 cmd[5], bank_sel = 0; diff --git a/drivers/mtd/spi/spi_flash_probe.c b/drivers/mtd/spi/spi_flash_probe.c index 1806fd1..e9fd013 100644 --- a/drivers/mtd/spi/spi_flash_probe.c +++ b/drivers/mtd/spi/spi_flash_probe.c @@ -18,7 +18,7 @@
DECLARE_GLOBAL_DATA_PTR;
-/* +/** * struct spi_flash_params - SPI/QSPI flash device params structure * * @name: Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO]) @@ -151,7 +151,7 @@ static const struct spi_flash_params spi_flash_params_table[] = { */ };
-struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode) +struct spi_flash *spi_flash_validate_params(struct spi_slave *spi, u8 *idcode) { const struct spi_flash_params *params; struct spi_flash *flash; @@ -190,13 +190,13 @@ struct spi_flash *spi_flash_validate_ids(struct spi_slave *spi, u8 *idcode) flash->name = params->name;
/* Assign spi_flash ops */ - flash->write = spi_flash_cmd_write_multi; + flash->write = spi_flash_cmd_write_ops; #ifdef CONFIG_SPI_FLASH_SST if (params->flags & SST_WP) flash->write = sst_write_wp; #endif - flash->erase = spi_flash_cmd_erase; - flash->read = spi_flash_cmd_read_fast; + flash->erase = spi_flash_cmd_erase_ops; + flash->read = spi_flash_cmd_read_ops;
/* Compute the flash size */ flash->page_size = (ext_jedec == 0x4d00) ? 512 : 256; @@ -314,8 +314,8 @@ struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, print_buffer(0, idcode, 1, sizeof(idcode), 0); #endif
- /* Validate ID's from flash dev table */ - flash = spi_flash_validate_ids(spi, idcode); + /* Validate params from spi_flash_params table */ + flash = spi_flash_validate_params(spi, idcode); if (!flash) goto err_read_id;
diff --git a/include/spi_flash.h b/include/spi_flash.h index a539516..b7cce12 100644 --- a/include/spi_flash.h +++ b/include/spi_flash.h @@ -1,7 +1,8 @@ /* - * Interface to SPI flash + * Common SPI flash Interface * * Copyright (C) 2008 Atmel Corporation + * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc. * * See file CREDITS for list of people who contributed to this * project. @@ -10,6 +11,7 @@ * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. */ + #ifndef _SPI_FLASH_H_ #define _SPI_FLASH_H_
@@ -17,18 +19,6 @@ #include <linux/types.h> #include <linux/compiler.h>
-/* SECT flags */ -#define SECT_4K (1 << 1) -#define SECT_32K (1 << 2) -#define E_FSR (1 << 3) - -/* SST specific macros */ -#ifdef CONFIG_SPI_FLASH_SST -# define SST_WP 0x01 /* Supports AAI word program */ -# define CMD_SST_BP 0x02 /* Byte Program */ -# define CMD_SST_AAI_WP 0xAD /* Auto Address Incr Word Program */ -#endif - /** * struct spi_flash - SPI flash structure *