X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=common%2Fcmd_eeprom.c;h=129162c015108c1b82066ff473e9c9cd67f1c8ad;hb=debb6299ac1180a08f29f88c6d782b21a9c98707;hp=3db0bca69dab8ff7744f144e59bf4415bb71d363;hpb=6dd652fa4d8591a32e2707a91f4582ed13011b17;p=karo-tx-uboot.git diff --git a/common/cmd_eeprom.c b/common/cmd_eeprom.c index 3db0bca69d..129162c015 100644 --- a/common/cmd_eeprom.c +++ b/common/cmd_eeprom.c @@ -22,35 +22,50 @@ * */ +/* + * Support for read and write access to EEPROM like memory devices. This + * includes regular EEPROM as well as FRAM (ferroelectic nonvolaile RAM). + * FRAM devices read and write data at bus speed. In particular, there is no + * write delay. Also, there is no limit imposed on the numer of bytes that can + * be transferred with a single read or write. + * + * Use the following configuration options to ensure no unneeded performance + * degradation (typical for EEPROM) is incured for FRAM memory: + * + * #define CONFIG_SYS_I2C_FRAM + * #undef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS + * + */ + #include #include #include #include -#if (CONFIG_COMMANDS & CFG_CMD_EEPROM) || defined(CFG_ENV_IS_IN_EEPROM) - 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); #endif -#if defined(CFG_EEPROM_X40430) +#if defined(CONFIG_SYS_EEPROM_X40430) /* Maximum number of times to poll for acknowledge after write */ #define MAX_ACKNOWLEDGE_POLLS 10 #endif /* ------------------------------------------------------------------------- */ -#if (CONFIG_COMMANDS & CFG_CMD_EEPROM) -int do_eeprom ( cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) +#if defined(CONFIG_CMD_EEPROM) +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(CFG_I2C_MULTI_EEPROMS) +#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); @@ -58,13 +73,13 @@ int do_eeprom ( cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) ulong cnt = simple_strtoul (argv[5], NULL, 16); #else if (argc == 5) { - ulong dev_addr = CFG_DEF_EEPROM_ADDR; + 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 /* CFG_I2C_MULTI_EEPROMS */ +#endif /* CONFIG_SYS_I2C_MULTI_EEPROMS */ -# ifndef CONFIG_SPI +# if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C) eeprom_init (); # endif /* !CONFIG_SPI */ @@ -75,7 +90,7 @@ int do_eeprom ( cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) rcode = eeprom_read (dev_addr, off, (uchar *) addr, cnt); - printf ("done\n"); + puts ("done\n"); return rcode; } else if (strcmp (argv[1], "write") == 0) { int rcode; @@ -84,30 +99,28 @@ int do_eeprom ( cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) rcode = eeprom_write (dev_addr, off, (uchar *) addr, cnt); - printf ("done\n"); + puts ("done\n"); return rcode; } } - printf ("Usage:\n%s\n", cmdtp->usage); + cmd_usage(cmdtp); return 1; } -#endif /* CFG_CMD_EEPROM */ +#endif /*----------------------------------------------------------------------- * - * for CFG_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is + * 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 CFG_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is + * 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 (CONFIG_COMMANDS & CFG_CMD_EEPROM) || defined(CFG_ENV_IS_IN_EEPROM) - -#ifndef CONFIG_SPI -#if !defined(CFG_I2C_EEPROM_ADDR_LEN) || CFG_I2C_EEPROM_ADDR_LEN < 1 || CFG_I2C_EEPROM_ADDR_LEN > 2 -#error CFG_I2C_EEPROM_ADDR_LEN must be 1 or 2 +#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 +#error CONFIG_SYS_I2C_EEPROM_ADDR_LEN must be 1 or 2 #endif #endif @@ -122,8 +135,12 @@ int eeprom_read (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt * because the next page may be in a different device. */ while (offset < end) { - unsigned alen, len, maxlen; -#if CFG_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X) + unsigned alen, len; +#if !defined(CONFIG_SYS_I2C_FRAM) + unsigned maxlen; +#endif + +#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X) uchar addr[2]; blk_off = offset & 0xFF; /* block offset */ @@ -140,17 +157,26 @@ int eeprom_read (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt addr[1] = offset >> 8; /* upper address octet */ addr[2] = blk_off; /* lower address octet */ alen = 3; -#endif /* CFG_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */ +#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */ addr[0] |= dev_addr; /* insert device address */ + len = end - offset; + + /* + * 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; - len = end - offset; if (len > maxlen) len = maxlen; -#ifdef CONFIG_SPI +#endif + +#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) spi_read (addr, alen, buffer, len); #else if (i2c_read (addr[0], offset, alen-1, buffer, len) != 0) @@ -159,15 +185,16 @@ int eeprom_read (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt buffer += len; offset += len; } + return rcode; } /*----------------------------------------------------------------------- * - * for CFG_I2C_EEPROM_ADDR_LEN == 2 (16-bit EEPROM address) offset is + * 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 CFG_I2C_EEPROM_ADDR_LEN == 1 (8-bit EEPROM page address) offset is + * 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. */ @@ -177,7 +204,7 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn unsigned blk_off; int rcode = 0; -#if defined(CFG_EEPROM_X40430) +#if defined(CONFIG_SYS_EEPROM_X40430) uchar contr_r_addr[2]; uchar addr_void[2]; uchar contr_reg[2]; @@ -185,14 +212,21 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn int i; #endif +#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. */ while (offset < end) { - unsigned alen, len, maxlen; -#if CFG_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X) + unsigned alen, len; +#if !defined(CONFIG_SYS_I2C_FRAM) + unsigned maxlen; +#endif + +#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X) uchar addr[2]; blk_off = offset & 0xFF; /* block offset */ @@ -209,13 +243,22 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn addr[1] = offset >> 8; /* upper address octet */ addr[2] = blk_off; /* lower address octet */ alen = 3; -#endif /* CFG_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */ +#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */ addr[0] |= dev_addr; /* insert device address */ -#if defined(CFG_EEPROM_PAGE_WRITE_BITS) + len = end - offset; + + /* + * 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) -#define EEPROM_PAGE_SIZE (1 << CFG_EEPROM_PAGE_WRITE_BITS) +#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_BITS) + +#define EEPROM_PAGE_SIZE (1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS) #define EEPROM_PAGE_OFFSET(x) ((x) & (EEPROM_PAGE_SIZE - 1)) maxlen = EEPROM_PAGE_SIZE - EEPROM_PAGE_OFFSET(blk_off); @@ -225,13 +268,14 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn if (maxlen > I2C_RXTX_LEN) maxlen = I2C_RXTX_LEN; - len = end - offset; if (len > maxlen) len = maxlen; -#ifdef CONFIG_SPI +#endif + +#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) spi_write (addr, alen, buffer, len); #else -#if defined(CFG_EEPROM_X40430) +#if defined(CONFIG_SYS_EEPROM_X40430) /* Get the value of the control register. * Set current address (internal pointer in the x40430) * to 0x1ff. @@ -240,9 +284,9 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn contr_r_addr[1] = 0xff; addr_void[0] = 0; addr_void[1] = addr[1]; -#ifdef CFG_I2C_EEPROM_ADDR - contr_r_addr[0] |= CFG_I2C_EEPROM_ADDR; - addr_void[0] |= CFG_I2C_EEPROM_ADDR; +#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) { @@ -290,12 +334,12 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn 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(CFG_EEPROM_PAGE_WRITE_DELAY_MS) - udelay(CFG_EEPROM_PAGE_WRITE_DELAY_MS * 1000); +#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS) + udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); #endif } if (i == MAX_ACKNOWLEDGE_POLLS) { - printf("EEPROM poll acknowledge failed\n"); + puts ("EEPROM poll acknowledge failed\n"); rcode = 1; } } @@ -320,14 +364,17 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn buffer += len; offset += len; -#if defined(CFG_EEPROM_PAGE_WRITE_DELAY_MS) - udelay(CFG_EEPROM_PAGE_WRITE_DELAY_MS * 1000); +#if defined(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS) + udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); #endif } +#if defined(CONFIG_SYS_EEPROM_WREN) + eeprom_write_enable (dev_addr,0); +#endif return rcode; } -#ifndef CONFIG_SPI +#if !defined(CONFIG_SPI) || defined(CONFIG_ENV_EEPROM_IS_ON_I2C) int eeprom_probe (unsigned dev_addr, unsigned offset) { @@ -335,11 +382,11 @@ eeprom_probe (unsigned dev_addr, unsigned offset) /* Probe the chip address */ -#if CFG_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X) +#if CONFIG_SYS_I2C_EEPROM_ADDR_LEN == 1 && !defined(CONFIG_SPI_X) chip = offset >> 8; /* block number */ #else chip = offset >> 16; /* block number */ -#endif /* CFG_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */ +#endif /* CONFIG_SYS_I2C_EEPROM_ADDR_LEN, CONFIG_SPI_X */ chip |= dev_addr; /* insert device address */ @@ -350,24 +397,45 @@ eeprom_probe (unsigned dev_addr, unsigned offset) /*----------------------------------------------------------------------- * Set default values */ -#ifndef CFG_I2C_SPEED -#define CFG_I2C_SPEED 50000 -#endif - -#ifndef CFG_I2C_SLAVE -#define CFG_I2C_SLAVE 0xFE +#ifndef CONFIG_SYS_I2C_SPEED +#define CONFIG_SYS_I2C_SPEED 50000 #endif void eeprom_init (void) { -#if defined(CONFIG_SPI) + +#if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) spi_init_f (); #endif #if defined(CONFIG_HARD_I2C) || \ defined(CONFIG_SOFT_I2C) - i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE); + i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); #endif } + /*----------------------------------------------------------------------- */ -#endif /* CFG_CMD_EEPROM */ + +/***************************************************/ + +#if defined(CONFIG_CMD_EEPROM) + +#ifdef CONFIG_SYS_I2C_MULTI_EEPROMS +U_BOOT_CMD( + eeprom, 6, 1, do_eeprom, + "EEPROM sub-system", + "read devaddr addr off cnt\n" + "eeprom write 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