diff options
| -rw-r--r-- | README | 47 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc8260/i2c.c | 14 | ||||
| -rw-r--r-- | common/cmd_i2c.c | 234 | ||||
| -rw-r--r-- | common/env_eeprom.c | 32 | ||||
| -rw-r--r-- | include/i2c.h | 21 |
5 files changed, 6 insertions, 342 deletions
@@ -2225,53 +2225,6 @@ CBFS (Coreboot Filesystem) support If not defined, then U-Boot uses predefined value for specified DTT device. - CONFIG_I2C_MUX - - Define this option if you have I2C devices reached over 1 .. n - I2C Muxes like the pca9544a. This option addes a new I2C - Command "i2c bus [muxtype:muxaddr:muxchannel]" which adds a - new I2C Bus to the existing I2C Busses. If you select the - new Bus with "i2c dev", u-bbot sends first the commandos for - the muxes to activate this new "bus". - - CONFIG_I2C_MULTI_BUS must be also defined, to use this - feature! - - Example: - Adding a new I2C Bus reached over 2 pca9544a muxes - The First mux with address 70 and channel 6 - The Second mux with address 71 and channel 4 - - => i2c bus pca9544a:70:6:pca9544a:71:4 - - Use the "i2c bus" command without parameter, to get a list - of I2C Busses with muxes: - - => i2c bus - Busses reached over muxes: - Bus ID: 2 - reached over Mux(es): - pca9544a@70 ch: 4 - Bus ID: 3 - reached over Mux(es): - pca9544a@70 ch: 6 - pca9544a@71 ch: 4 - => - - If you now switch to the new I2C Bus 3 with "i2c dev 3" - u-boot first sends the command to the mux@70 to enable - channel 6, and then the command to the mux@71 to enable - the channel 4. - - After that, you can use the "normal" i2c commands as - usual to communicate with your I2C devices behind - the 2 muxes. - - This option is actually implemented for the bitbanging - algorithm in common/soft_i2c.c and for the Hardware I2C - Bus on the MPC8260. But it should be not so difficult - to add this option to other architectures. - CONFIG_SOFT_I2C_READ_REPEATED_START defining this will force the i2c_read() function in diff --git a/arch/powerpc/cpu/mpc8260/i2c.c b/arch/powerpc/cpu/mpc8260/i2c.c index e2341e9..bbbe404 100644 --- a/arch/powerpc/cpu/mpc8260/i2c.c +++ b/arch/powerpc/cpu/mpc8260/i2c.c @@ -746,23 +746,9 @@ unsigned int i2c_get_bus_num(void) int i2c_set_bus_num(unsigned int bus) { -#if defined(CONFIG_I2C_MUX) - if (bus < CONFIG_SYS_MAX_I2C_BUS) { - i2c_bus_num = bus; - } else { - int ret; - - ret = i2x_mux_select_mux(bus); - if (ret == 0) - i2c_bus_num = bus; - else - return ret; - } -#else if (bus >= CONFIG_SYS_MAX_I2C_BUS) return -1; i2c_bus_num = bus; -#endif return 0; } diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c index 5614a6d..5c60d31 100644 --- a/common/cmd_i2c.c +++ b/common/cmd_i2c.c @@ -110,8 +110,7 @@ static uint i2c_mm_last_alen; * pairs. The following macros take care of this */ #if defined(CONFIG_SYS_I2C_NOPROBES) -#if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MUX) || \ - defined(CONFIG_I2C_MULTI_BUS) +#if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS) static struct { uchar bus; @@ -132,11 +131,6 @@ static uchar i2c_no_probes[] = CONFIG_SYS_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; -#endif - #define DISP_LINE_LEN 16 /** @@ -1554,7 +1548,7 @@ static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv static cmd_tbl_t cmd_i2c_sub[] = { #if defined(CONFIG_SYS_I2C) U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""), -#endif /* CONFIG_I2C_MUX */ +#endif U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""), #if defined(CONFIG_SYS_I2C) || \ defined(CONFIG_I2C_MULTI_BUS) @@ -1618,7 +1612,7 @@ static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) static char i2c_help_text[] = #if defined(CONFIG_SYS_I2C) "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n" -#endif /* CONFIG_I2C_MUX */ +#endif "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n" #if defined(CONFIG_SYS_I2C) || \ defined(CONFIG_I2C_MULTI_BUS) @@ -1647,225 +1641,3 @@ U_BOOT_CMD( "I2C sub-system", i2c_help_text ); - -#if defined(CONFIG_I2C_MUX) -static 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 immediately sends 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; - - } - i2c_init_board(); - - 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) { - /* do deblocking on each level of mux, before mux config */ - i2c_init_board(); - 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; - } - /* do deblocking on each level of mux and after mux config */ - i2c_init_board(); - return 0; -} -#endif /* CONFIG_I2C_MUX */ diff --git a/common/env_eeprom.c b/common/env_eeprom.c index fbd459a..21226bf 100644 --- a/common/env_eeprom.c +++ b/common/env_eeprom.c @@ -49,41 +49,17 @@ static int eeprom_bus_read(unsigned dev_addr, unsigned offset, #if defined(CONFIG_I2C_ENV_EEPROM_BUS) int old_bus = i2c_get_bus_num(); -#if defined(CONFIG_SYS_I2C) if (old_bus != CONFIG_I2C_ENV_EEPROM_BUS) i2c_set_bus_num(CONFIG_I2C_ENV_EEPROM_BUS); -#else - if (gd->flags & GD_FLG_RELOC) { - if (env_eeprom_bus == -1) { - I2C_MUX_DEVICE *dev = NULL; - dev = i2c_mux_ident_muxstring( - (uchar *)CONFIG_I2C_ENV_EEPROM_BUS); - if (dev != NULL) - env_eeprom_bus = dev->busid; - else - printf("error adding env eeprom bus.\n"); - } - if (old_bus != env_eeprom_bus) { - i2c_set_bus_num(env_eeprom_bus); - old_bus = env_eeprom_bus; - } - } else { - rcode = i2c_mux_ident_muxstring_f( - (uchar *)CONFIG_I2C_ENV_EEPROM_BUS); - } -#endif #endif rcode = eeprom_read(dev_addr, offset, buffer, cnt); #if defined(CONFIG_I2C_ENV_EEPROM_BUS) -#if defined(CONFIG_SYS_I2C) - if (old_bus != CONFIG_I2C_ENV_EEPROM_BUS) -#else if (old_bus != env_eeprom_bus) -#endif i2c_set_bus_num(old_bus); #endif + return rcode; } @@ -94,14 +70,12 @@ static int eeprom_bus_write(unsigned dev_addr, unsigned offset, #if defined(CONFIG_I2C_ENV_EEPROM_BUS) int old_bus = i2c_get_bus_num(); -#if defined(CONFIG_SYS_I2C) if (old_bus != CONFIG_I2C_ENV_EEPROM_BUS) i2c_set_bus_num(CONFIG_I2C_ENV_EEPROM_BUS); -#else - rcode = i2c_mux_ident_muxstring_f((uchar *)CONFIG_I2C_ENV_EEPROM_BUS); -#endif #endif + rcode = eeprom_write(dev_addr, offset, buffer, cnt); + #if defined(CONFIG_I2C_ENV_EEPROM_BUS) i2c_set_bus_num(old_bus); #endif diff --git a/include/i2c.h b/include/i2c.h index f532a14..a8074ac 100644 --- a/include/i2c.h +++ b/include/i2c.h @@ -197,27 +197,6 @@ void i2c_init_board(void); void i2c_board_late_init(void); #endif -#if defined(CONFIG_I2C_MUX) - -typedef struct _mux { - uchar chip; - uchar channel; - char *name; - struct _mux *next; -} I2C_MUX; - -typedef struct _mux_device { - int busid; - I2C_MUX *mux; /* List of muxes, to reach the device */ - struct _mux_device *next; -} I2C_MUX_DEVICE; - -I2C_MUX_DEVICE *i2c_mux_search_device(int id); -I2C_MUX_DEVICE *i2c_mux_ident_muxstring (uchar *buf); -int i2x_mux_select_mux(int bus); -int i2c_mux_ident_muxstring_f (uchar *buf); -#endif - #ifdef CONFIG_SYS_I2C /* * i2c_get_bus_num: |