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-rw-r--r--common/cmd_i2c.c121
1 files changed, 81 insertions, 40 deletions
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
index 438079447..5614a6d06 100644
--- a/common/cmd_i2c.c
+++ b/common/cmd_i2c.c
@@ -1,4 +1,9 @@
/*
+ * (C) Copyright 2009
+ * Sergey Kubushyn, himself, ksi@koi8.net
+ *
+ * Changes for unified multibus/multiadapter I2C support.
+ *
* (C) Copyright 2001
* Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com.
*
@@ -85,6 +90,8 @@
#include <asm/byteorder.h>
#include <linux/compiler.h>
+DECLARE_GLOBAL_DATA_PTR;
+
/* Display values from last command.
* Memory modify remembered values are different from display memory.
*/
@@ -103,7 +110,8 @@ static uint i2c_mm_last_alen;
* pairs. The following macros take care of this */
#if defined(CONFIG_SYS_I2C_NOPROBES)
-#if defined(CONFIG_I2C_MULTI_BUS)
+#if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MUX) || \
+ defined(CONFIG_I2C_MULTI_BUS)
static struct
{
uchar bus;
@@ -119,7 +127,7 @@ static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
#define COMPARE_BUS(b,i) ((b) == 0) /* Make compiler happy */
#define COMPARE_ADDR(a,i) (i2c_no_probes[(i)] == (a))
#define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
-#endif /* CONFIG_MULTI_BUS */
+#endif /* defined(CONFIG_SYS_I2C) */
#define NUM_ELEMENTS_NOPROBE (sizeof(i2c_no_probes)/sizeof(i2c_no_probes[0]))
#endif
@@ -127,9 +135,6 @@ static uchar i2c_no_probes[] = CONFIG_SYS_I2C_NOPROBES;
#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
#define DISP_LINE_LEN 16
@@ -144,7 +149,6 @@ DECLARE_GLOBAL_DATA_PTR;
__weak
void i2c_init_board(void)
{
- return;
}
/* TODO: Implement architecture-specific get/set functions */
@@ -161,6 +165,11 @@ void i2c_init_board(void)
*
* Returns I2C bus speed in Hz.
*/
+#if !defined(CONFIG_SYS_I2C)
+/*
+ * TODO: Implement architecture-specific get/set functions
+ * Should go away, if we switched completely to new multibus support
+ */
__weak
unsigned int i2c_get_bus_speed(void)
{
@@ -188,6 +197,7 @@ int i2c_set_bus_speed(unsigned int speed)
return 0;
}
+#endif
/**
* get_alen() - Small parser helper function to get address length
@@ -700,7 +710,7 @@ static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv
int found = 0;
#if defined(CONFIG_SYS_I2C_NOPROBES)
int k, skip;
- uchar bus = GET_BUS_NUM;
+ unsigned int bus = GET_BUS_NUM;
#endif /* NOPROBES */
if (argc == 2)
@@ -1373,9 +1383,8 @@ int do_edid(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
}
#endif /* CONFIG_I2C_EDID */
-#if defined(CONFIG_I2C_MUX)
/**
- * do_i2c_add_bus() - Handle the "i2c bus" command-line command
+ * do_i2c_show_bus() - Handle the "i2c bus" command-line command
* @cmdtp: Command data struct pointer
* @flag: Command flag
* @argc: Command-line argument count
@@ -1383,35 +1392,55 @@ int do_edid(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
*
* Returns zero always.
*/
-static int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
+#if defined(CONFIG_SYS_I2C)
+int do_i2c_show_bus(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
- int ret=0;
+ int i;
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+ int j;
+#endif
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;
+ for (i = 0; i < CONFIG_SYS_NUM_I2C_BUSES; i++) {
+ printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+ for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
+ if (i2c_bus[i].next_hop[j].chip == 0)
+ break;
+ printf("->%s@0x%2x:%d",
+ i2c_bus[i].next_hop[j].mux.name,
+ i2c_bus[i].next_hop[j].chip,
+ i2c_bus[i].next_hop[j].channel);
}
- device = device->next;
+#endif
+ printf("\n");
}
} else {
- (void)i2c_mux_ident_muxstring ((uchar *)argv[1]);
- ret = 0;
+ /* show specific bus */
+ i = simple_strtoul(argv[1], NULL, 10);
+ if (i >= CONFIG_SYS_NUM_I2C_BUSES) {
+ printf("Invalid bus %d\n", i);
+ return -1;
+ }
+ printf("Bus %d:\t%s", i, I2C_ADAP_NR(i)->name);
+#ifndef CONFIG_SYS_I2C_DIRECT_BUS
+ for (j = 0; j < CONFIG_SYS_I2C_MAX_HOPS; j++) {
+ if (i2c_bus[i].next_hop[j].chip == 0)
+ break;
+ printf("->%s@0x%2x:%d",
+ i2c_bus[i].next_hop[j].mux.name,
+ i2c_bus[i].next_hop[j].chip,
+ i2c_bus[i].next_hop[j].channel);
+ }
+#endif
+ printf("\n");
}
- return ret;
+
+ return 0;
}
-#endif /* CONFIG_I2C_MUX */
+#endif
-#if defined(CONFIG_I2C_MULTI_BUS)
/**
* do_i2c_bus_num() - Handle the "i2c dev" command-line command
* @cmdtp: Command data struct pointer
@@ -1422,23 +1451,29 @@ static int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char * const ar
* Returns zero on success, CMD_RET_USAGE in case of misuse and negative
* on error.
*/
-static int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
+#if defined(CONFIG_SYS_I2C) || defined(CONFIG_I2C_MULTI_BUS)
+int do_i2c_bus_num(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
- int bus_idx, ret=0;
+ int ret = 0;
+ unsigned int bus_no;
if (argc == 1)
/* querying current setting */
printf("Current bus is %d\n", i2c_get_bus_num());
else {
- bus_idx = simple_strtoul(argv[1], NULL, 10);
- printf("Setting bus to %d\n", bus_idx);
- ret = i2c_set_bus_num(bus_idx);
+ bus_no = simple_strtoul(argv[1], NULL, 10);
+ if (bus_no >= CONFIG_SYS_NUM_I2C_BUSES) {
+ printf("Invalid bus %d\n", bus_no);
+ return -1;
+ }
+ printf("Setting bus to %d\n", bus_no);
+ ret = i2c_set_bus_num(bus_no);
if (ret)
printf("Failure changing bus number (%d)\n", ret);
}
return ret;
}
-#endif /* CONFIG_I2C_MULTI_BUS */
+#endif /* defined(CONFIG_SYS_I2C) */
/**
* do_i2c_bus_speed() - Handle the "i2c speed" command-line command
@@ -1508,16 +1543,21 @@ static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
*/
static int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
+#if defined(CONFIG_SYS_I2C)
+ i2c_init(I2C_ADAP->speed, I2C_ADAP->slaveaddr);
+#else
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
+#endif
return 0;
}
static cmd_tbl_t cmd_i2c_sub[] = {
-#if defined(CONFIG_I2C_MUX)
- U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_add_bus, "", ""),
+#if defined(CONFIG_SYS_I2C)
+ U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_show_bus, "", ""),
#endif /* CONFIG_I2C_MUX */
U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
-#if defined(CONFIG_I2C_MULTI_BUS)
+#if defined(CONFIG_SYS_I2C) || \
+ defined(CONFIG_I2C_MULTI_BUS)
U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
#endif /* CONFIG_I2C_MULTI_BUS */
#if defined(CONFIG_I2C_EDID)
@@ -1576,11 +1616,12 @@ static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
/***************************************************/
#ifdef CONFIG_SYS_LONGHELP
static char i2c_help_text[] =
-#if defined(CONFIG_I2C_MUX)
- "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
+#if defined(CONFIG_SYS_I2C)
+ "bus [muxtype:muxaddr:muxchannel] - show I2C bus info\n"
#endif /* CONFIG_I2C_MUX */
"crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
-#if defined(CONFIG_I2C_MULTI_BUS)
+#if defined(CONFIG_SYS_I2C) || \
+ defined(CONFIG_I2C_MULTI_BUS)
"i2c dev [dev] - show or set current I2C bus\n"
#endif /* CONFIG_I2C_MULTI_BUS */
#if defined(CONFIG_I2C_EDID)
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 16:22:41 +0000