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-rw-r--r--common/cmd_i2c.c296
1 files changed, 286 insertions, 10 deletions
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
index ea80e8a..84ecf49 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))
@@ -125,6 +127,14 @@ 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[]);
@@ -313,7 +323,7 @@ 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
@@ -519,8 +529,8 @@ 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;
@@ -542,14 +552,14 @@ 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)) {
@@ -565,7 +575,7 @@ 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))
@@ -1182,6 +1192,43 @@ 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[])
{
@@ -1220,6 +1267,10 @@ 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)
@@ -1238,6 +1289,8 @@ 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)
@@ -1256,6 +1309,9 @@ 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)
"i2c dev [dev] - show or set current I2C bus\n"
@@ -1266,6 +1322,7 @@ U_BOOT_CMD(
"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"
@@ -1326,3 +1383,222 @@ 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 */
+
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