diff options
Diffstat (limited to 'common/cmd_eeprom.c')
| -rw-r--r-- | common/cmd_eeprom.c | 501 |
1 files changed, 169 insertions, 332 deletions
diff --git a/common/cmd_eeprom.c b/common/cmd_eeprom.c index e9904cd..6eab1ea 100644 --- a/common/cmd_eeprom.c +++ b/common/cmd_eeprom.c @@ -25,404 +25,241 @@ #include <command.h> #include <i2c.h> -extern void eeprom_init (void); -extern int eeprom_read (unsigned dev_addr, unsigned offset, - uchar *buffer, unsigned cnt); -extern int eeprom_write (unsigned dev_addr, unsigned offset, - uchar *buffer, unsigned cnt); -#if defined(CONFIG_SYS_EEPROM_WREN) -extern int eeprom_write_enable (unsigned dev_addr, int state); +#ifndef CONFIG_SYS_I2C_SPEED +#define CONFIG_SYS_I2C_SPEED 50000 #endif - -#if defined(CONFIG_SYS_EEPROM_X40430) - /* Maximum number of times to poll for acknowledge after write */ -#define MAX_ACKNOWLEDGE_POLLS 10 +#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS +#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS 0 #endif -/* ------------------------------------------------------------------------- */ - -#if defined(CONFIG_CMD_EEPROM) -static int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) -{ - const char *const fmt = - "\nEEPROM @0x%lX %s: addr %08lx off %04lx count %ld ... "; - -#if defined(CONFIG_SYS_I2C_MULTI_EEPROMS) - if (argc == 6) { - ulong dev_addr = simple_strtoul (argv[2], NULL, 16); - ulong addr = simple_strtoul (argv[3], NULL, 16); - ulong off = simple_strtoul (argv[4], NULL, 16); - ulong cnt = simple_strtoul (argv[5], NULL, 16); -#else - if (argc == 5) { - ulong dev_addr = CONFIG_SYS_DEF_EEPROM_ADDR; - ulong addr = simple_strtoul (argv[2], NULL, 16); - ulong off = simple_strtoul (argv[3], NULL, 16); - ulong cnt = simple_strtoul (argv[4], NULL, 16); -#endif /* CONFIG_SYS_I2C_MULTI_EEPROMS */ - -# if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C) - eeprom_init (); -# endif /* !CONFIG_SPI */ - - if (strcmp (argv[1], "read") == 0) { - int rcode; - - printf (fmt, dev_addr, argv[1], addr, off, cnt); - - rcode = eeprom_read (dev_addr, off, (uchar *) addr, cnt); - - puts ("done\n"); - return rcode; - } else if (strcmp (argv[1], "write") == 0) { - int rcode; - - printf (fmt, dev_addr, argv[1], addr, off, cnt); - - rcode = eeprom_write (dev_addr, off, (uchar *) addr, cnt); - - puts ("done\n"); - return rcode; - } - } - - return CMD_RET_USAGE; -} +#ifndef CONFIG_SYS_EEPROM_PAGE_WRITE_BITS +#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 8 #endif -/*----------------------------------------------------------------------- - * +#define EEPROM_PAGE_SIZE (1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS) +#define EEPROM_PAGE_OFFSET(x) ((x) & (EEPROM_PAGE_SIZE - 1)) + +/* * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is * 0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM. * * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is * 0x00000nxx for EEPROM address selectors and page number at n. */ - #if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C) -#if !defined(CONFIG_SYS_I2C_EEPROM_ADDR_LEN) || CONFIG_SYS_I2C_EEPROM_ADDR_LEN < 1 || CONFIG_SYS_I2C_EEPROM_ADDR_LEN > 2 +#if !defined(CONFIG_SYS_I2C_EEPROM_ADDR_LEN) || \ + (CONFIG_SYS_I2C_EEPROM_ADDR_LEN < 1) || \ + (CONFIG_SYS_I2C_EEPROM_ADDR_LEN > 2) #error CONFIG_SYS_I2C_EEPROM_ADDR_LEN must be 1 or 2 #endif #endif -int eeprom_read (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt) +__weak int eeprom_write_enable(unsigned dev_addr, int state) { - unsigned end = offset + cnt; - unsigned blk_off; - int rcode = 0; + return 0; +} - /* Read data until done or would cross a page boundary. - * We must write the address again when changing pages - * because the next page may be in a different device. - */ - while (offset < end) { - unsigned alen, len; -#if !defined(CONFIG_SYS_I2C_FRAM) - unsigned maxlen; +void eeprom_init(int bus) +{ + /* SPI EEPROM */ +#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) + spi_init_f(); #endif -#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X) - uchar addr[2]; + /* I2C EEPROM */ +#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C_SOFT) +#if defined(CONFIG_SYS_I2C) + if (bus >= 0) + i2c_set_bus_num(bus); +#endif + i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); +#endif +} - blk_off = offset & 0xFF; /* block offset */ +static int eeprom_addr(unsigned dev_addr, unsigned offset, uchar *addr) +{ + unsigned blk_off; + int alen; - addr[0] = offset >> 8; /* block number */ - addr[1] = blk_off; /* block offset */ - alen = 2; + blk_off = offset & 0xff; /* block offset */ +#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 + addr[0] = offset >> 8; /* block number */ + addr[1] = blk_off; /* block offset */ + alen = 2; #else - uchar addr[3]; - - blk_off = offset & 0xFF; /* block offset */ - - addr[0] = offset >> 16; /* block number */ - addr[1] = offset >> 8; /* upper address octet */ - addr[2] = blk_off; /* lower address octet */ - alen = 3; -#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */ - - addr[0] |= dev_addr; /* insert device address */ + addr[0] = offset >> 16; /* block number */ + addr[1] = offset >> 8; /* upper address octet */ + addr[2] = blk_off; /* lower address octet */ + alen = 3; +#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN */ - len = end - offset; + addr[0] |= dev_addr; /* insert device address */ - /* - * For a FRAM device there is no limit on the number of the - * bytes that can be ccessed with the single read or write - * operation. - */ -#if !defined(CONFIG_SYS_I2C_FRAM) - maxlen = 0x100 - blk_off; - if (maxlen > I2C_RXTX_LEN) - maxlen = I2C_RXTX_LEN; - if (len > maxlen) - len = maxlen; -#endif - -#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) - spi_read (addr, alen, buffer, len); -#else -#if defined(CONFIG_SYS_I2C_EEPROM_BUS) - i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS); -#endif - if (i2c_read(addr[0], offset, alen - 1, buffer, len)) - rcode = 1; -#endif - buffer += len; - offset += len; - } - - return rcode; + return alen; } -/*----------------------------------------------------------------------- - * - * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is - * 0x000nxxxx for EEPROM address selectors at n, offset xxxx in EEPROM. - * - * for CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is - * 0x00000nxx for EEPROM address selectors and page number at n. - */ - -int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt) +static int eeprom_len(unsigned offset, unsigned end) { - unsigned end = offset + cnt; - unsigned blk_off; - int rcode = 0; - -#if defined(CONFIG_SYS_EEPROM_X40430) - uchar contr_r_addr[2]; - uchar addr_void[2]; - uchar contr_reg[2]; - uchar ctrl_reg_v; - int i; -#endif + unsigned len = end - offset; -#if defined(CONFIG_SYS_EEPROM_WREN) - eeprom_write_enable (dev_addr,1); -#endif - /* Write data until done or would cross a write page boundary. - * We must write the address again when changing pages - * because the address counter only increments within a page. + /* + * For a FRAM device there is no limit on the number of the + * bytes that can be ccessed with the single read or write + * operation. */ - - while (offset < end) { - unsigned alen, len; #if !defined(CONFIG_SYS_I2C_FRAM) - unsigned maxlen; -#endif + unsigned blk_off = offset & 0xff; + unsigned maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off); -#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X) - uchar addr[2]; + if (maxlen > I2C_RXTX_LEN) + maxlen = I2C_RXTX_LEN; - blk_off = offset & 0xFF; /* block offset */ - - addr[0] = offset >> 8; /* block number */ - addr[1] = blk_off; /* block offset */ - alen = 2; -#else - uchar addr[3]; + if (len > maxlen) + len = maxlen; +#endif - blk_off = offset & 0xFF; /* block offset */ + return len; +} - addr[0] = offset >> 16; /* block number */ - addr[1] = offset >> 8; /* upper address octet */ - addr[2] = blk_off; /* lower address octet */ - alen = 3; -#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */ +static int eeprom_rw_block(unsigned offset, uchar *addr, unsigned alen, + uchar *buffer, unsigned len, bool read) +{ + int ret = 0; - addr[0] |= dev_addr; /* insert device address */ + /* SPI */ +#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) + if (read) + spi_read(addr, alen, buffer, len); + else + spi_write(addr, alen, buffer, len); +#else /* I2C */ - len = end - offset; +#if defined(CONFIG_SYS_I2C_EEPROM_BUS) + i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS); +#endif - /* - * For a FRAM device there is no limit on the number of the - * bytes that can be accessed with the single read or write - * operation. - */ -#if !defined(CONFIG_SYS_I2C_FRAM) + if (read) + ret = i2c_read(addr[0], offset, alen - 1, buffer, len); + else + ret = i2c_write(addr[0], offset, alen - 1, buffer, len); -#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_BITS) + if (ret) + ret = 1; +#endif + return ret; +} -#define EEPROM_PAGE_SIZE (1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS) -#define EEPROM_PAGE_OFFSET(x) ((x) & (EEPROM_PAGE_SIZE - 1)) +static int eeprom_rw(unsigned dev_addr, unsigned offset, uchar *buffer, + unsigned cnt, bool read) +{ + unsigned end = offset + cnt; + unsigned alen, len; + int rcode = 0; + uchar addr[3]; - maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off); -#else - maxlen = 0x100 - blk_off; -#endif - if (maxlen > I2C_RXTX_LEN) - maxlen = I2C_RXTX_LEN; + while (offset < end) { + alen = eeprom_addr(dev_addr, offset, addr); - if (len > maxlen) - len = maxlen; -#endif + len = eeprom_len(offset, end); -#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) - spi_write (addr, alen, buffer, len); -#else -#if defined(CONFIG_SYS_EEPROM_X40430) - /* Get the value of the control register. - * Set current address (internal pointer in the x40430) - * to 0x1ff. - */ - contr_r_addr[0] = 9; - contr_r_addr[1] = 0xff; - addr_void[0] = 0; - addr_void[1] = addr[1]; -#ifdef CONFIG_SYS_I2C_EEPROM_ADDR - contr_r_addr[0] |= CONFIG_SYS_I2C_EEPROM_ADDR; - addr_void[0] |= CONFIG_SYS_I2C_EEPROM_ADDR; -#endif - contr_reg[0] = 0xff; - if (i2c_read (contr_r_addr[0], contr_r_addr[1], 1, contr_reg, 1) != 0) { - rcode = 1; - } - ctrl_reg_v = contr_reg[0]; - - /* Are any of the eeprom blocks write protected? - */ - if (ctrl_reg_v & 0x18) { - ctrl_reg_v &= ~0x18; /* reset block protect bits */ - ctrl_reg_v |= 0x02; /* set write enable latch */ - ctrl_reg_v &= ~0x04; /* clear RWEL */ - - /* Set write enable latch. - */ - contr_reg[0] = 0x02; - if (i2c_write (contr_r_addr[0], 0xff, 1, contr_reg, 1) != 0) { - rcode = 1; - } - - /* Set register write enable latch. - */ - contr_reg[0] = 0x06; - if (i2c_write (contr_r_addr[0], 0xFF, 1, contr_reg, 1) != 0) { - rcode = 1; - } - - /* Modify ctrl register. - */ - contr_reg[0] = ctrl_reg_v; - if (i2c_write (contr_r_addr[0], 0xFF, 1, contr_reg, 1) != 0) { - rcode = 1; - } - - /* The write (above) is an operation on NV memory. - * These can take some time (~5ms), and the device - * will not respond to further I2C messages till - * it's completed the write. - * So poll device for an I2C acknowledge. - * When we get one we know we can continue with other - * operations. - */ - contr_reg[0] = 0; - for (i = 0; i < MAX_ACKNOWLEDGE_POLLS; i++) { - if (i2c_read (addr_void[0], addr_void[1], 1, contr_reg, 1) == 0) - break; /* got ack */ -#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS) - udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); -#endif - } - if (i == MAX_ACKNOWLEDGE_POLLS) { - puts ("EEPROM poll acknowledge failed\n"); - rcode = 1; - } - } - - /* Is the write enable latch on?. - */ - else if (!(ctrl_reg_v & 0x02)) { - /* Set write enable latch. - */ - contr_reg[0] = 0x02; - if (i2c_write (contr_r_addr[0], 0xFF, 1, contr_reg, 1) != 0) { - rcode = 1; - } - } - /* Write is enabled ... now write eeprom value. - */ -#endif -#if defined(CONFIG_SYS_I2C_EEPROM_BUS) - i2c_set_bus_num(CONFIG_SYS_I2C_EEPROM_BUS); -#endif - if (i2c_write(addr[0], offset, alen - 1, buffer, len)) - rcode = 1; + rcode = eeprom_rw_block(offset, addr, alen, buffer, len, read); -#endif buffer += len; offset += len; -#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS) - udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); -#endif + if (!read) + udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); } -#if defined(CONFIG_SYS_EEPROM_WREN) - eeprom_write_enable (dev_addr,0); -#endif + return rcode; } -#if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C) -int -eeprom_probe (unsigned dev_addr, unsigned offset) +int eeprom_read(unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt) { - unsigned char chip; - - /* Probe the chip address + /* + * Read data until done or would cross a page boundary. + * We must write the address again when changing pages + * because the next page may be in a different device. */ -#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X) - chip = offset >> 8; /* block number */ -#else - chip = offset >> 16; /* block number */ -#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */ + return eeprom_rw(dev_addr, offset, buffer, cnt, 1); +} + +int eeprom_write(unsigned dev_addr, unsigned offset, + uchar *buffer, unsigned cnt) +{ + int ret; + + eeprom_write_enable(dev_addr, 1); - chip |= dev_addr; /* insert device address */ + /* + * Write data until done or would cross a write page boundary. + * We must write the address again when changing pages + * because the address counter only increments within a page. + */ + ret = eeprom_rw(dev_addr, offset, buffer, cnt, 1); - return (i2c_probe (chip)); + eeprom_write_enable(dev_addr, 0); + return ret; } -#endif -/*----------------------------------------------------------------------- - * Set default values - */ -#ifndef CONFIG_SYS_I2C_SPEED -#define CONFIG_SYS_I2C_SPEED 50000 +static int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + const char *const fmt = + "\nEEPROM @0x%lX %s: addr %08lx off %04lx count %ld ... "; + char * const *args = &argv[2]; + int rcode; + ulong dev_addr, addr, off, cnt; + int bus_addr; + + switch (argc) { +#ifdef CONFIG_SYS_DEF_EEPROM_ADDR + case 5: + bus_addr = -1; + dev_addr = CONFIG_SYS_DEF_EEPROM_ADDR; + break; #endif + case 6: + bus_addr = -1; + dev_addr = simple_strtoul(*args++, NULL, 16); + break; + case 7: + bus_addr = simple_strtoul(*args++, NULL, 16); + dev_addr = simple_strtoul(*args++, NULL, 16); + break; + default: + return CMD_RET_USAGE; + } -void eeprom_init (void) -{ + addr = simple_strtoul(*args++, NULL, 16); + off = simple_strtoul(*args++, NULL, 16); + cnt = simple_strtoul(*args++, NULL, 16); -#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) - spi_init_f (); -#endif -#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C_SOFT) - i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); -#endif -} + eeprom_init(bus_addr); -/*----------------------------------------------------------------------- - */ + if (strcmp(argv[1], "read") == 0) { + printf(fmt, dev_addr, argv[1], addr, off, cnt); + + rcode = eeprom_read(dev_addr, off, (uchar *)addr, cnt); + + puts("done\n"); + return rcode; + } else if (strcmp(argv[1], "write") == 0) { + printf(fmt, dev_addr, argv[1], addr, off, cnt); -/***************************************************/ + rcode = eeprom_write(dev_addr, off, (uchar *)addr, cnt); -#if defined(CONFIG_CMD_EEPROM) + puts("done\n"); + return rcode; + } + + return CMD_RET_USAGE; +} -#ifdef CONFIG_SYS_I2C_MULTI_EEPROMS U_BOOT_CMD( - eeprom, 6, 1, do_eeprom, + eeprom, 7, 1, do_eeprom, "EEPROM sub-system", - "read devaddr addr off cnt\n" - "eeprom write devaddr addr off cnt\n" + "read <bus> <devaddr> addr off cnt\n" + "eeprom write <bus> <devaddr> addr off cnt\n" " - read/write `cnt' bytes from `devaddr` EEPROM at offset `off'" ) -#else /* One EEPROM */ -U_BOOT_CMD( - eeprom, 5, 1, do_eeprom, - "EEPROM sub-system", - "read addr off cnt\n" - "eeprom write addr off cnt\n" - " - read/write `cnt' bytes at EEPROM offset `off'" -) -#endif /* CONFIG_SYS_I2C_MULTI_EEPROMS */ - -#endif |