diff options
Diffstat (limited to 'common/cmd_i2c.c')
| -rw-r--r-- | common/cmd_i2c.c | 309 |
1 files changed, 289 insertions, 20 deletions
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c index 91bf25b..448f2fe 100644 --- a/common/cmd_i2c.c +++ b/common/cmd_i2c.c @@ -65,7 +65,7 @@ * significant 1, 2, or 3 bits of address into the chip address byte. * This effectively makes one chip (logically) look like 2, 4, or * 8 chips. This is handled (awkwardly) by #defining - * CFG_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the + * CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW and using the .1 modifier on the * {addr} field (since .1 is the default, it doesn't actually have to * be specified). Examples: given a memory chip at I2C chip address * 0x50, the following would happen... @@ -83,7 +83,9 @@ #include <common.h> #include <command.h> +#include <environment.h> #include <i2c.h> +#include <malloc.h> #include <asm/byteorder.h> /* Display values from last command. @@ -103,19 +105,19 @@ static uint i2c_mm_last_alen; * When multiple buses are present, the list is an array of bus-address * pairs. The following macros take care of this */ -#if defined(CFG_I2C_NOPROBES) +#if defined(CONFIG_SYS_I2C_NOPROBES) #if defined(CONFIG_I2C_MULTI_BUS) static struct { uchar bus; uchar addr; -} i2c_no_probes[] = CFG_I2C_NOPROBES; +} i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES; #define GET_BUS_NUM i2c_get_bus_num() #define COMPARE_BUS(b,i) (i2c_no_probes[(i)].bus == (b)) #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)].addr == (a)) #define NO_PROBE_ADDR(i) i2c_no_probes[(i)].addr #else /* single bus */ -static uchar i2c_no_probes[] = CFG_I2C_NOPROBES; +static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES; #define GET_BUS_NUM 0 #define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */ #define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a)) @@ -125,9 +127,16 @@ static uchar i2c_no_probes[] = CFG_I2C_NOPROBES; #define NUM_ELEMENTS_NOPROBE (sizeof(i2c_no_probes)/sizeof(i2c_no_probes[0])) #endif +#if defined(CONFIG_I2C_MUX) +static I2C_MUX_DEVICE *i2c_mux_devices = NULL; +static int i2c_mux_busid = CONFIG_SYS_MAX_I2C_BUS; + +DECLARE_GLOBAL_DATA_PTR; + +#endif + static int mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[]); -extern int cmd_get_data_size(char* arg, int default_size); /* * Syntax: @@ -240,7 +249,6 @@ int do_i2c_mm ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return mod_i2c_mem (cmdtp, 1, flag, argc, argv); } - int do_i2c_nm ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { return mod_i2c_mem (cmdtp, 0, flag, argc, argv); @@ -314,7 +322,7 @@ int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) /* * No write delay with FRAM devices. */ -#if !defined(CFG_I2C_FRAM) +#if !defined(CONFIG_SYS_I2C_FRAM) udelay(11000); #endif @@ -330,7 +338,6 @@ int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return (0); } - /* Calculate a CRC on memory * * Syntax: @@ -400,7 +407,6 @@ int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return 0; } - /* Modify memory. * * Syntax: @@ -520,8 +526,8 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[]) #endif if (i2c_write(chip, addr, alen, (uchar *)&data, size) != 0) puts ("Error writing the chip.\n"); -#ifdef CFG_EEPROM_PAGE_WRITE_DELAY_MS - udelay(CFG_EEPROM_PAGE_WRITE_DELAY_MS * 1000); +#ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS + udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000); #endif if (incrflag) addr += size; @@ -543,14 +549,14 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[]) int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { int j; -#if defined(CFG_I2C_NOPROBES) +#if defined(CONFIG_SYS_I2C_NOPROBES) int k, skip; uchar bus = GET_BUS_NUM; #endif /* NOPROBES */ puts ("Valid chip addresses:"); for (j = 0; j < 128; j++) { -#if defined(CFG_I2C_NOPROBES) +#if defined(CONFIG_SYS_I2C_NOPROBES) skip = 0; for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) { if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) { @@ -566,7 +572,7 @@ int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) } putc ('\n'); -#if defined(CFG_I2C_NOPROBES) +#if defined(CONFIG_SYS_I2C_NOPROBES) puts ("Excluded chip addresses:"); for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) { if (COMPARE_BUS(bus,k)) @@ -578,7 +584,6 @@ int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return 0; } - /* * Syntax: * iloop {i2c_chip} {addr}{.0, .1, .2} [{length}] [{delay}] @@ -649,7 +654,6 @@ int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) return 0; } - /* * The SDRAM command is separately configured because many * (most?) embedded boards don't use SDRAM DIMMs. @@ -1183,6 +1187,43 @@ int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) #endif #if defined(CONFIG_I2C_CMD_TREE) +int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) +{ + i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); + return 0; +} + +#if defined(CONFIG_I2C_MUX) +int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) +{ + int ret=0; + + if (argc == 1) { + /* show all busses */ + I2C_MUX *mux; + I2C_MUX_DEVICE *device = i2c_mux_devices; + + printf ("Busses reached over muxes:\n"); + while (device != NULL) { + printf ("Bus ID: %x\n", device->busid); + printf (" reached over Mux(es):\n"); + mux = device->mux; + while (mux != NULL) { + printf (" %s@%x ch: %x\n", mux->name, mux->chip, mux->channel); + mux = mux->next; + } + device = device->next; + } + } else { + I2C_MUX_DEVICE *dev; + + dev = i2c_mux_ident_muxstring ((uchar *)argv[1]); + ret = 0; + } + return ret; +} +#endif /* CONFIG_I2C_MUX */ + #if defined(CONFIG_I2C_MULTI_BUS) int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) { @@ -1221,12 +1262,16 @@ int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) { +#if defined(CONFIG_I2C_MUX) + if (!strncmp(argv[1], "bu", 2)) + return do_i2c_add_bus(cmdtp, flag, --argc, ++argv); +#endif /* CONFIG_I2C_MUX */ + if (!strncmp(argv[1], "sp", 2)) + return do_i2c_bus_speed(cmdtp, flag, --argc, ++argv); #if defined(CONFIG_I2C_MULTI_BUS) if (!strncmp(argv[1], "de", 2)) return do_i2c_bus_num(cmdtp, flag, --argc, ++argv); #endif /* CONFIG_I2C_MULTI_BUS */ - if (!strncmp(argv[1], "sp", 2)) - return do_i2c_bus_speed(cmdtp, flag, --argc, ++argv); if (!strncmp(argv[1], "md", 2)) return do_i2c_md(cmdtp, flag, --argc, ++argv); if (!strncmp(argv[1], "mm", 2)) @@ -1239,6 +1284,8 @@ int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) return do_i2c_crc(cmdtp, flag, --argc, ++argv); if (!strncmp(argv[1], "pr", 2)) return do_i2c_probe(cmdtp, flag, --argc, ++argv); + if (!strncmp(argv[1], "re", 2)) + return do_i2c_reset(cmdtp, flag, --argc, ++argv); if (!strncmp(argv[1], "lo", 2)) return do_i2c_loop(cmdtp, flag, --argc, ++argv); #if defined(CONFIG_CMD_SDRAM) @@ -1257,16 +1304,20 @@ int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) U_BOOT_CMD( i2c, 6, 1, do_i2c, "i2c - I2C sub-system\n", +#if defined(CONFIG_I2C_MUX) + "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes.\n" +#endif /* CONFIG_I2C_MUX */ + "speed [speed] - show or set I2C bus speed\n" #if defined(CONFIG_I2C_MULTI_BUS) - "dev [dev] - show or set current I2C bus\n" + "i2c dev [dev] - show or set current I2C bus\n" #endif /* CONFIG_I2C_MULTI_BUS */ - "i2c speed [speed] - show or set I2C bus speed\n" "i2c md chip address[.0, .1, .2] [# of objects] - read from I2C device\n" "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n" "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n" "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n" "i2c crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n" "i2c probe - show devices on the I2C bus\n" + "i2c reset - re-init the I2C Controller\n" "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n" #if defined(CONFIG_CMD_SDRAM) "i2c sdram chip - print SDRAM configuration information\n" @@ -1327,3 +1378,221 @@ U_BOOT_CMD( " (valid chip values 50..57)\n" ); #endif + +#if defined(CONFIG_I2C_MUX) + +int i2c_mux_add_device(I2C_MUX_DEVICE *dev) +{ + I2C_MUX_DEVICE *devtmp = i2c_mux_devices; + + if (i2c_mux_devices == NULL) { + i2c_mux_devices = dev; + return 0; + } + while (devtmp->next != NULL) + devtmp = devtmp->next; + + devtmp->next = dev; + return 0; +} + +I2C_MUX_DEVICE *i2c_mux_search_device(int id) +{ + I2C_MUX_DEVICE *device = i2c_mux_devices; + + while (device != NULL) { + if (device->busid == id) + return device; + device = device->next; + } + return NULL; +} + +/* searches in the buf from *pos the next ':'. + * returns: + * 0 if found (with *pos = where) + * < 0 if an error occured + * > 0 if the end of buf is reached + */ +static int i2c_mux_search_next (int *pos, uchar *buf, int len) +{ + while ((buf[*pos] != ':') && (*pos < len)) { + *pos += 1; + } + if (*pos >= len) + return 1; + if (buf[*pos] != ':') + return -1; + return 0; +} + +static int i2c_mux_get_busid (void) +{ + int tmp = i2c_mux_busid; + + i2c_mux_busid ++; + return tmp; +} + +/* Analyses a Muxstring and sends immediately the + Commands to the Muxes. Runs from Flash. + */ +int i2c_mux_ident_muxstring_f (uchar *buf) +{ + int pos = 0; + int oldpos; + int ret = 0; + int len = strlen((char *)buf); + int chip; + uchar channel; + int was = 0; + + while (ret == 0) { + oldpos = pos; + /* search name */ + ret = i2c_mux_search_next(&pos, buf, len); + if (ret != 0) + printf ("ERROR\n"); + /* search address */ + pos ++; + oldpos = pos; + ret = i2c_mux_search_next(&pos, buf, len); + if (ret != 0) + printf ("ERROR\n"); + buf[pos] = 0; + chip = simple_strtoul((char *)&buf[oldpos], NULL, 16); + buf[pos] = ':'; + /* search channel */ + pos ++; + oldpos = pos; + ret = i2c_mux_search_next(&pos, buf, len); + if (ret < 0) + printf ("ERROR\n"); + was = 0; + if (buf[pos] != 0) { + buf[pos] = 0; + was = 1; + } + channel = simple_strtoul((char *)&buf[oldpos], NULL, 16); + if (was) + buf[pos] = ':'; + if (i2c_write(chip, 0, 0, &channel, 1) != 0) { + printf ("Error setting Mux: chip:%x channel: \ + %x\n", chip, channel); + return -1; + } + pos ++; + oldpos = pos; + + } + + return 0; +} + +/* Analyses a Muxstring and if this String is correct + * adds a new I2C Bus. + */ +I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf) +{ + I2C_MUX_DEVICE *device; + I2C_MUX *mux; + int pos = 0; + int oldpos; + int ret = 0; + int len = strlen((char *)buf); + int was = 0; + + device = (I2C_MUX_DEVICE *)malloc (sizeof(I2C_MUX_DEVICE)); + device->mux = NULL; + device->busid = i2c_mux_get_busid (); + device->next = NULL; + while (ret == 0) { + mux = (I2C_MUX *)malloc (sizeof(I2C_MUX)); + mux->next = NULL; + /* search name of mux */ + oldpos = pos; + ret = i2c_mux_search_next(&pos, buf, len); + if (ret != 0) + printf ("%s no name.\n", __FUNCTION__); + mux->name = (char *)malloc (pos - oldpos + 1); + memcpy (mux->name, &buf[oldpos], pos - oldpos); + mux->name[pos - oldpos] = 0; + /* search address */ + pos ++; + oldpos = pos; + ret = i2c_mux_search_next(&pos, buf, len); + if (ret != 0) + printf ("%s no mux address.\n", __FUNCTION__); + buf[pos] = 0; + mux->chip = simple_strtoul((char *)&buf[oldpos], NULL, 16); + buf[pos] = ':'; + /* search channel */ + pos ++; + oldpos = pos; + ret = i2c_mux_search_next(&pos, buf, len); + if (ret < 0) + printf ("%s no mux channel.\n", __FUNCTION__); + was = 0; + if (buf[pos] != 0) { + buf[pos] = 0; + was = 1; + } + mux->channel = simple_strtoul((char *)&buf[oldpos], NULL, 16); + if (was) + buf[pos] = ':'; + if (device->mux == NULL) + device->mux = mux; + else { + I2C_MUX *muxtmp = device->mux; + while (muxtmp->next != NULL) { + muxtmp = muxtmp->next; + } + muxtmp->next = mux; + } + pos ++; + oldpos = pos; + } + if (ret > 0) { + /* Add Device */ + i2c_mux_add_device (device); + return device; + } + + return NULL; +} + +int i2x_mux_select_mux(int bus) +{ + I2C_MUX_DEVICE *dev; + I2C_MUX *mux; + + if ((gd->flags & GD_FLG_RELOC) != GD_FLG_RELOC) { + /* select Default Mux Bus */ +#if defined(CONFIG_SYS_I2C_IVM_BUS) + i2c_mux_ident_muxstring_f ((uchar *)CONFIG_SYS_I2C_IVM_BUS); +#else + { + unsigned char *buf; + buf = (unsigned char *) getenv("EEprom_ivm"); + if (buf != NULL) + i2c_mux_ident_muxstring_f (buf); + } +#endif + return 0; + } + dev = i2c_mux_search_device(bus); + if (dev == NULL) + return -1; + + mux = dev->mux; + while (mux != NULL) { + if (i2c_write(mux->chip, 0, 0, &mux->channel, 1) != 0) { + printf ("Error setting Mux: chip:%x channel: \ + %x\n", mux->chip, mux->channel); + return -1; + } + mux = mux->next; + } + return 0; +} +#endif /* CONFIG_I2C_MUX */ |