summaryrefslogtreecommitdiff
path: root/common/cmd_i2c.c
diff options
context:
space:
mode:
Diffstat (limited to 'common/cmd_i2c.c')
-rw-r--r--common/cmd_i2c.c254
1 files changed, 174 insertions, 80 deletions
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
index c543bb5..45cfde2 100644
--- a/common/cmd_i2c.c
+++ b/common/cmd_i2c.c
@@ -101,8 +101,31 @@ static uchar i2c_mm_last_chip;
static uint i2c_mm_last_addr;
static uint i2c_mm_last_alen;
+/* If only one I2C bus is present, the list of devices to ignore when
+ * the probe command is issued is represented by a 1D array of addresses.
+ * 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_I2C_MULTI_BUS)
+static struct
+{
+ uchar bus;
+ uchar addr;
+} i2c_no_probes[] = CFG_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;
+#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))
+#define NO_PROBE_ADDR(i) i2c_no_probes[(i)]
+#endif /* CONFIG_MULTI_BUS */
+
+#define NUM_ELEMENTS_NOPROBE (sizeof(i2c_no_probes)/sizeof(i2c_no_probes[0]))
#endif
static int
@@ -151,7 +174,7 @@ int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
*/
addr = simple_strtoul(argv[2], NULL, 16);
alen = 1;
- for(j = 0; j < 8; j++) {
+ for (j = 0; j < 8; j++) {
if (argv[2][j] == '.') {
alen = argv[2][j+1] - '0';
if (alen > 4) {
@@ -159,9 +182,8 @@ int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return 1;
}
break;
- } else if (argv[2][j] == '\0') {
+ } else if (argv[2][j] == '\0')
break;
- }
}
/*
@@ -185,9 +207,9 @@ int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
linebytes = (nbytes > DISP_LINE_LEN) ? DISP_LINE_LEN : nbytes;
- if(i2c_read(chip, addr, alen, linebuf, linebytes) != 0) {
+ if (i2c_read(chip, addr, alen, linebuf, linebytes) != 0)
puts ("Error reading the chip.\n");
- } else {
+ else {
printf("%04x:", addr);
cp = linebuf;
for (j=0; j<linebytes; j++) {
@@ -256,17 +278,16 @@ int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
*/
addr = simple_strtoul(argv[2], NULL, 16);
alen = 1;
- for(j = 0; j < 8; j++) {
+ for (j = 0; j < 8; j++) {
if (argv[2][j] == '.') {
alen = argv[2][j+1] - '0';
- if(alen > 4) {
+ if (alen > 4) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
break;
- } else if (argv[2][j] == '\0') {
+ } else if (argv[2][j] == '\0')
break;
- }
}
/*
@@ -277,16 +298,14 @@ int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
/*
* Optional count
*/
- if(argc == 5) {
+ if (argc == 5)
count = simple_strtoul(argv[4], NULL, 16);
- } else {
+ else
count = 1;
- }
while (count-- > 0) {
- if(i2c_write(chip, addr++, alen, &byte, 1) != 0) {
+ if (i2c_write(chip, addr++, alen, &byte, 1) != 0)
puts ("Error writing the chip.\n");
- }
/*
* Wait for the write to complete. The write can take
* up to 10mSec (we allow a little more time).
@@ -303,9 +322,9 @@ int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
#endif
#if 0
- for(timeout = 0; timeout < 10; timeout++) {
+ for (timeout = 0; timeout < 10; timeout++) {
udelay(2000);
- if(i2c_probe(chip) == 0)
+ if (i2c_probe(chip) == 0)
break;
}
#endif
@@ -346,17 +365,16 @@ int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
*/
addr = simple_strtoul(argv[2], NULL, 16);
alen = 1;
- for(j = 0; j < 8; j++) {
+ for (j = 0; j < 8; j++) {
if (argv[2][j] == '.') {
alen = argv[2][j+1] - '0';
- if(alen > 4) {
+ if (alen > 4) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
break;
- } else if (argv[2][j] == '\0') {
+ } else if (argv[2][j] == '\0')
break;
- }
}
/*
@@ -371,19 +389,16 @@ int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
*/
crc = 0;
err = 0;
- while(count-- > 0) {
- if(i2c_read(chip, addr, alen, &byte, 1) != 0) {
+ while (count-- > 0) {
+ if (i2c_read(chip, addr, alen, &byte, 1) != 0)
err++;
- }
crc = crc32 (crc, &byte, 1);
addr++;
}
- if(err > 0)
- {
+ if (err > 0)
puts ("Error reading the chip,\n");
- } else {
+ else
printf ("%08lx\n", crc);
- }
return 0;
}
@@ -441,17 +456,16 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
*/
addr = simple_strtoul(argv[2], NULL, 16);
alen = 1;
- for(j = 0; j < 8; j++) {
+ for (j = 0; j < 8; j++) {
if (argv[2][j] == '.') {
alen = argv[2][j+1] - '0';
- if(alen > 4) {
+ if (alen > 4) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
break;
- } else if (argv[2][j] == '\0') {
+ } else if (argv[2][j] == '\0')
break;
- }
}
}
@@ -461,17 +475,16 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
*/
do {
printf("%08lx:", addr);
- if(i2c_read(chip, addr, alen, (uchar *)&data, size) != 0) {
+ if (i2c_read(chip, addr, alen, (uchar *)&data, size) != 0)
puts ("\nError reading the chip,\n");
- } else {
+ else {
data = cpu_to_be32(data);
- if(size == 1) {
+ if (size == 1)
printf(" %02lx", (data >> 24) & 0x000000FF);
- } else if(size == 2) {
+ else if (size == 2)
printf(" %04lx", (data >> 16) & 0x0000FFFF);
- } else {
+ else
printf(" %08lx", data);
- }
}
nbytes = readline (" ? ");
@@ -488,19 +501,17 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
#endif
}
#ifdef CONFIG_BOOT_RETRY_TIME
- else if (nbytes == -2) {
+ else if (nbytes == -2)
break; /* timed out, exit the command */
- }
#endif
else {
char *endp;
data = simple_strtoul(console_buffer, &endp, 16);
- if(size == 1) {
+ if (size == 1)
data = data << 24;
- } else if(size == 2) {
+ else if (size == 2)
data = data << 16;
- }
data = be32_to_cpu(data);
nbytes = endp - console_buffer;
if (nbytes) {
@@ -510,9 +521,8 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
*/
reset_cmd_timeout();
#endif
- if(i2c_write(chip, addr, alen, (uchar *)&data, size) != 0) {
+ 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);
#endif
@@ -538,14 +548,15 @@ int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
int j;
#if defined(CFG_I2C_NOPROBES)
int k, skip;
-#endif
+ uchar bus = GET_BUS_NUM;
+#endif /* NOPROBES */
puts ("Valid chip addresses:");
- for(j = 0; j < 128; j++) {
+ for (j = 0; j < 128; j++) {
#if defined(CFG_I2C_NOPROBES)
skip = 0;
- for (k = 0; k < sizeof(i2c_no_probes); k++){
- if (j == i2c_no_probes[k]){
+ for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
+ if (COMPARE_BUS(bus, k) && COMPARE_ADDR(j, k)) {
skip = 1;
break;
}
@@ -553,16 +564,17 @@ int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
if (skip)
continue;
#endif
- if(i2c_probe(j) == 0) {
+ if (i2c_probe(j) == 0)
printf(" %02X", j);
- }
}
putc ('\n');
#if defined(CFG_I2C_NOPROBES)
puts ("Excluded chip addresses:");
- for( k = 0; k < sizeof(i2c_no_probes); k++ )
- printf(" %02X", i2c_no_probes[k] );
+ for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) {
+ if (COMPARE_BUS(bus,k))
+ printf(" %02X", NO_PROBE_ADDR(k));
+ }
putc ('\n');
#endif
@@ -601,7 +613,7 @@ int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
*/
addr = simple_strtoul(argv[2], NULL, 16);
alen = 1;
- for(j = 0; j < 8; j++) {
+ for (j = 0; j < 8; j++) {
if (argv[2][j] == '.') {
alen = argv[2][j+1] - '0';
if (alen > 4) {
@@ -609,9 +621,8 @@ int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
return 1;
}
break;
- } else if (argv[2][j] == '\0') {
+ } else if (argv[2][j] == '\0')
break;
- }
}
/*
@@ -619,24 +630,21 @@ int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
*/
length = 1;
length = simple_strtoul(argv[3], NULL, 16);
- if(length > sizeof(bytes)) {
+ if (length > sizeof(bytes))
length = sizeof(bytes);
- }
/*
* The delay time (uSec) is optional.
*/
delay = 1000;
- if (argc > 3) {
+ if (argc > 3)
delay = simple_strtoul(argv[4], NULL, 10);
- }
/*
* Run the loop...
*/
- while(1) {
- if(i2c_read(chip, addr, alen, bytes, length) != 0) {
+ while (1) {
+ if (i2c_read(chip, addr, alen, bytes, length) != 0)
puts ("Error reading the chip.\n");
- }
udelay(delay);
}
@@ -671,7 +679,7 @@ int do_sdram ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
*/
chip = simple_strtoul(argv[1], NULL, 16);
- if(i2c_read(chip, 0, 1, data, sizeof(data)) != 0) {
+ if (i2c_read(chip, 0, 1, data, sizeof(data)) != 0) {
puts ("No SDRAM Serial Presence Detect found.\n");
return 1;
}
@@ -680,7 +688,7 @@ int do_sdram ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
for (j = 0; j < 63; j++) {
cksum += data[j];
}
- if(cksum != data[63]) {
+ if (cksum != data[63]) {
printf ("WARNING: Configuration data checksum failure:\n"
" is 0x%02x, calculated 0x%02x\n",
data[63], cksum);
@@ -696,17 +704,15 @@ int do_sdram ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
default: puts ("unknown\n"); break;
}
puts ("Row address bits ");
- if((data[3] & 0x00F0) == 0) {
+ if ((data[3] & 0x00F0) == 0)
printf("%d\n", data[3] & 0x0F);
- } else {
+ else
printf("%d/%d\n", data[3] & 0x0F, (data[3] >> 4) & 0x0F);
- }
puts ("Column address bits ");
- if((data[4] & 0x00F0) == 0) {
+ if ((data[4] & 0x00F0) == 0)
printf("%d\n", data[4] & 0x0F);
- } else {
+ else
printf("%d/%d\n", data[4] & 0x0F, (data[4] >> 4) & 0x0F);
- }
printf("Module rows %d\n", data[5]);
printf("Module data width %d bits\n", (data[7] << 8) | data[6]);
puts ("Interface signal levels ");
@@ -729,11 +735,10 @@ int do_sdram ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
case 2: puts ("ECC\n"); break;
default: puts ("unknown\n"); break;
}
- if((data[12] & 0x80) == 0) {
+ if ((data[12] & 0x80) == 0)
puts ("No self refresh, rate ");
- } else {
+ else
puts ("Self refresh, rate ");
- }
switch(data[12] & 0x7F) {
case 0: puts ("15.625uS\n"); break;
case 1: puts ("3.9uS\n"); break;
@@ -744,17 +749,16 @@ int do_sdram ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
default: puts ("unknown\n"); break;
}
printf("SDRAM width (primary) %d\n", data[13] & 0x7F);
- if((data[13] & 0x80) != 0) {
+ if ((data[13] & 0x80) != 0) {
printf(" (second bank) %d\n",
2 * (data[13] & 0x7F));
}
- if(data[14] != 0) {
+ if (data[14] != 0) {
printf("EDC width %d\n",
data[14] & 0x7F);
- if((data[14] & 0x80) != 0) {
+ if ((data[14] & 0x80) != 0)
printf(" (second bank) %d\n",
2 * (data[14] & 0x7F));
- }
}
printf("Min clock delay, back-to-back random column addresses %d\n",
data[15]);
@@ -852,18 +856,18 @@ int do_sdram ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
(data[35] & 0x80) ? '-' : '+',
(data[35] >> 4) & 0x07, data[35] & 0x0F);
puts ("Manufacturer's JEDEC ID ");
- for(j = 64; j <= 71; j++)
+ for (j = 64; j <= 71; j++)
printf("%02X ", data[j]);
putc ('\n');
printf("Manufacturing Location %02X\n", data[72]);
puts ("Manufacturer's Part Number ");
- for(j = 73; j <= 90; j++)
+ for (j = 73; j <= 90; j++)
printf("%02X ", data[j]);
putc ('\n');
printf("Revision Code %02X %02X\n", data[91], data[92]);
printf("Manufacturing Date %02X %02X\n", data[93], data[94]);
puts ("Assembly Serial Number ");
- for(j = 95; j <= 98; j++)
+ for (j = 95; j <= 98; j++)
printf("%02X ", data[j]);
putc ('\n');
printf("Speed rating PC%d\n",
@@ -873,6 +877,74 @@ int do_sdram ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
}
#endif /* CFG_CMD_SDRAM */
+#if defined(CONFIG_I2C_CMD_TREE)
+#if defined(CONFIG_I2C_MULTI_BUS)
+int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ int bus_idx, ret=0;
+
+ 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);
+ if (ret)
+ printf("Failure changing bus number (%d)\n", ret);
+ }
+ return ret;
+}
+#endif /* CONFIG_I2C_MULTI_BUS */
+
+int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ int speed, ret=0;
+
+ if (argc == 1)
+ /* querying current speed */
+ printf("Current bus speed=%d\n", i2c_get_bus_speed());
+ else {
+ speed = simple_strtoul(argv[1], NULL, 10);
+ printf("Setting bus speed to %d Hz\n", speed);
+ ret = i2c_set_bus_speed(speed);
+ if (ret)
+ printf("Failure changing bus speed (%d)\n", ret);
+ }
+ return ret;
+}
+
+int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *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))
+ return do_i2c_mm(cmdtp, flag, --argc, ++argv);
+ if (!strncmp(argv[1], "mw", 2))
+ return do_i2c_mw(cmdtp, flag, --argc, ++argv);
+ if (!strncmp(argv[1], "nm", 2))
+ return do_i2c_nm(cmdtp, flag, --argc, ++argv);
+ if (!strncmp(argv[1], "cr", 2))
+ 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], "lo", 2))
+ return do_i2c_loop(cmdtp, flag, --argc, ++argv);
+#if (CONFIG_COMMANDS & CFG_CMD_SDRAM)
+ if (!strncmp(argv[1], "sd", 2))
+ return do_sdram(cmdtp, flag, --argc, ++argv);
+#endif /* CFG_CMD_SDRAM */
+ else
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 0;
+}
+#endif /* CONFIG_I2C_CMD_TREE */
/***************************************************/
@@ -930,4 +1002,26 @@ U_BOOT_CMD(
" (valid chip values 50..57)\n"
);
#endif
+
+#if defined(CONFIG_I2C_CMD_TREE)
+U_BOOT_CMD(
+ i2c, 6, 1, do_i2c,
+ "i2c - I2C sub-system\n",
+#if defined(CONFIG_I2C_MULTI_BUS)
+ "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 loop chip address[.0, .1, .2] [# of objects] - looping read of device\n"
+#if (CONFIG_COMMANDS & CFG_CMD_SDRAM)
+ "i2c sdram chip - print SDRAM configuration information\n"
+#endif /* CFG_CMD_SDRAM */
+);
+#endif /* CONFIG_I2C_CMD_TREE */
+
#endif /* CFG_CMD_I2C */
generated by cgit v1.1 at 2024-11-30 20:29:51 +0000