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-rw-r--r--common/cmd_i2c.c267
1 files changed, 156 insertions, 111 deletions
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c
index 62cbd335e5..8b9c2c9490 100644
--- a/common/cmd_i2c.c
+++ b/common/cmd_i2c.c
@@ -130,6 +130,8 @@ DECLARE_GLOBAL_DATA_PTR;
#endif
+#define DISP_LINE_LEN 16
+
/* TODO: Implement architecture-specific get/set functions */
unsigned int __def_i2c_get_bus_speed(void)
{
@@ -149,12 +151,82 @@ int i2c_set_bus_speed(unsigned int)
__attribute__((weak, alias("__def_i2c_set_bus_speed")));
/*
+ * get_alen: small parser helper function to get address length
+ * returns the address length,or 0 on error
+ */
+static uint get_alen(char *arg)
+{
+ int j;
+ int alen;
+
+ alen = 1;
+ for (j = 0; j < 8; j++) {
+ if (arg[j] == '.') {
+ alen = arg[j+1] - '0';
+ if (alen > 3) {
+ return 0;
+ }
+ break;
+ } else if (arg[j] == '\0')
+ break;
+ }
+ return alen;
+}
+
+/*
* Syntax:
- * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
+ * i2c read {i2c_chip} {devaddr}{.0, .1, .2} {len} {memaddr}
*/
-#define DISP_LINE_LEN 16
-int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+static int do_i2c_read ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+{
+ u_char chip;
+ uint devaddr, alen, length;
+ u_char *memaddr;
+
+ if (argc != 5) {
+ cmd_usage(cmdtp);
+ return 1;
+ }
+
+ /*
+ * I2C chip address
+ */
+ chip = simple_strtoul(argv[1], NULL, 16);
+
+ /*
+ * I2C data address within the chip. This can be 1 or
+ * 2 bytes long. Some day it might be 3 bytes long :-).
+ */
+ devaddr = simple_strtoul(argv[2], NULL, 16);
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
+ }
+
+ /*
+ * Length is the number of objects, not number of bytes.
+ */
+ length = simple_strtoul(argv[3], NULL, 16);
+
+ /*
+ * memaddr is the address where to store things in memory
+ */
+ memaddr = (u_char *)simple_strtoul(argv[4], NULL, 16);
+
+ if (i2c_read(chip, devaddr, alen, memaddr, length) != 0) {
+ puts ("Error reading the chip.\n");
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Syntax:
+ * i2c md {i2c_chip} {addr}{.0, .1, .2} {len}
+ */
+static int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
u_char chip;
uint addr, alen, length;
@@ -177,7 +249,6 @@ int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
/*
* New command specified.
*/
- alen = 1;
/*
* I2C chip address
@@ -189,17 +260,10 @@ int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* 2 bytes long. Some day it might be 3 bytes long :-).
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 4) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
/*
@@ -260,14 +324,13 @@ int do_i2c_md ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* Syntax:
* i2c mw {i2c_chip} {addr}{.0, .1, .2} {data} [{count}]
*/
-int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+static int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
uchar chip;
ulong addr;
uint alen;
uchar byte;
int count;
- int j;
if ((argc < 4) || (argc > 5)) {
cmd_usage(cmdtp);
@@ -283,17 +346,10 @@ int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* Address is always specified.
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 4) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
/*
@@ -332,7 +388,7 @@ int do_i2c_mw ( cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* Syntax:
* i2c crc32 {i2c_chip} {addr}{.0, .1, .2} {count}
*/
-int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
uchar chip;
ulong addr;
@@ -341,7 +397,6 @@ int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
uchar byte;
ulong crc;
ulong err;
- int j;
if (argc < 4) {
cmd_usage(cmdtp);
@@ -357,17 +412,10 @@ int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* Address is always specified.
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 4) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
/*
@@ -412,7 +460,6 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
ulong data;
int size = 1;
int nbytes;
- int j;
extern char console_buffer[];
if (argc != 3) {
@@ -447,17 +494,10 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
* Address is always specified.
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 4) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
}
@@ -535,7 +575,7 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char *argv[])
* Syntax:
* i2c probe {addr}{.0, .1, .2}
*/
-int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
int j;
#if defined(CONFIG_SYS_I2C_NOPROBES)
@@ -579,7 +619,7 @@ int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* {length} - Number of bytes to read
* {delay} - A DECIMAL number and defaults to 1000 uSec
*/
-int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+static int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
u_char chip;
ulong alen;
@@ -587,7 +627,6 @@ int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
uint length;
u_char bytes[16];
int delay;
- int j;
if (argc < 3) {
cmd_usage(cmdtp);
@@ -603,17 +642,10 @@ int do_i2c_loop(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
* Address is always specified.
*/
addr = simple_strtoul(argv[2], NULL, 16);
- alen = 1;
- for (j = 0; j < 8; j++) {
- if (argv[2][j] == '.') {
- alen = argv[2][j+1] - '0';
- if (alen > 4) {
- cmd_usage(cmdtp);
- return 1;
- }
- break;
- } else if (argv[2][j] == '\0')
- break;
+ alen = get_alen(argv[2]);
+ if (alen == 0) {
+ cmd_usage(cmdtp);
+ return 1;
}
/*
@@ -699,7 +731,7 @@ static void decode_bits (u_char const b, char const *str[], int const do_once)
* Syntax:
* i2c sdram {i2c_chip}
*/
-int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+static int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
enum { unknown, EDO, SDRAM, DDR2 } type;
@@ -1176,7 +1208,7 @@ int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
#endif
#if defined(CONFIG_I2C_MUX)
-int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+static int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
int ret=0;
@@ -1207,7 +1239,7 @@ int do_i2c_add_bus(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
#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[])
+static int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
int bus_idx, ret=0;
@@ -1225,7 +1257,7 @@ int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
}
#endif /* CONFIG_I2C_MULTI_BUS */
-int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+static int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
int speed, ret=0;
@@ -1242,46 +1274,60 @@ int do_i2c_bus_speed(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
return ret;
}
-int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+static int do_i2c_mm(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
- /* Strip off leading 'i2c' command argument */
- argc--;
- argv++;
+ return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
+}
+static int do_i2c_nm(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
+}
+
+static 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;
+}
+
+static cmd_tbl_t cmd_i2c_sub[] = {
#if defined(CONFIG_I2C_MUX)
- if (!strncmp(argv[0], "bu", 2))
- return do_i2c_add_bus(cmdtp, flag, argc, argv);
+ U_BOOT_CMD_MKENT(bus, 1, 1, do_i2c_add_bus, "", ""),
#endif /* CONFIG_I2C_MUX */
- if (!strncmp(argv[0], "sp", 2))
- return do_i2c_bus_speed(cmdtp, flag, argc, argv);
+ U_BOOT_CMD_MKENT(crc32, 3, 1, do_i2c_crc, "", ""),
#if defined(CONFIG_I2C_MULTI_BUS)
- if (!strncmp(argv[0], "de", 2))
- return do_i2c_bus_num(cmdtp, flag, argc, argv);
+ U_BOOT_CMD_MKENT(dev, 1, 1, do_i2c_bus_num, "", ""),
#endif /* CONFIG_I2C_MULTI_BUS */
- if (!strncmp(argv[0], "md", 2))
- return do_i2c_md(cmdtp, flag, argc, argv);
- if (!strncmp(argv[0], "mm", 2))
- return mod_i2c_mem (cmdtp, 1, flag, argc, argv);
- if (!strncmp(argv[0], "mw", 2))
- return do_i2c_mw(cmdtp, flag, argc, argv);
- if (!strncmp(argv[0], "nm", 2))
- return mod_i2c_mem (cmdtp, 0, flag, argc, argv);
- if (!strncmp(argv[0], "cr", 2))
- return do_i2c_crc(cmdtp, flag, argc, argv);
- if (!strncmp(argv[0], "pr", 2))
- return do_i2c_probe(cmdtp, flag, argc, argv);
- if (!strncmp(argv[0], "re", 2)) {
- i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
- return 0;
- }
- if (!strncmp(argv[0], "lo", 2))
- return do_i2c_loop(cmdtp, flag, argc, argv);
+ U_BOOT_CMD_MKENT(loop, 3, 1, do_i2c_loop, "", ""),
+ U_BOOT_CMD_MKENT(md, 3, 1, do_i2c_md, "", ""),
+ U_BOOT_CMD_MKENT(mm, 2, 1, do_i2c_mm, "", ""),
+ U_BOOT_CMD_MKENT(mw, 3, 1, do_i2c_mw, "", ""),
+ U_BOOT_CMD_MKENT(nm, 2, 1, do_i2c_nm, "", ""),
+ U_BOOT_CMD_MKENT(probe, 0, 1, do_i2c_probe, "", ""),
+ U_BOOT_CMD_MKENT(read, 5, 1, do_i2c_read, "", ""),
+ U_BOOT_CMD_MKENT(reset, 0, 1, do_i2c_reset, "", ""),
#if defined(CONFIG_CMD_SDRAM)
- if (!strncmp(argv[0], "sd", 2))
- return do_sdram(cmdtp, flag, argc, argv);
+ U_BOOT_CMD_MKENT(sdram, 1, 1, do_sdram, "", ""),
#endif
- cmd_usage(cmdtp);
- return 0;
+ U_BOOT_CMD_MKENT(speed, 1, 1, do_i2c_bus_speed, "", ""),
+};
+
+static int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+{
+ cmd_tbl_t *c;
+
+ /* Strip off leading 'i2c' command argument */
+ argc--;
+ argv++;
+
+ c = find_cmd_tbl(argv[0], &cmd_i2c_sub[0], ARRAY_SIZE(cmd_i2c_sub));
+
+ if (c) {
+ return c->cmd(cmdtp, flag, argc, argv);
+ } else {
+ cmd_usage(cmdtp);
+ return 1;
+ }
}
/***************************************************/
@@ -1289,30 +1335,29 @@ int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
U_BOOT_CMD(
i2c, 6, 1, do_i2c,
"I2C sub-system",
- "speed [speed] - show or set I2C bus speed\n"
#if defined(CONFIG_I2C_MUX)
- "i2c bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\n"
+ "bus [muxtype:muxaddr:muxchannel] - add a new bus reached over muxes\ni2c "
#endif /* CONFIG_I2C_MUX */
+ "crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n"
#if defined(CONFIG_I2C_MULTI_BUS)
"i2c dev [dev] - show or set current I2C bus\n"
#endif /* CONFIG_I2C_MULTI_BUS */
+ "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\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 read chip address[.0, .1, .2] length memaddress - read to memory \n"
"i2c reset - re-init the I2C Controller\n"
- "i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device"
#if defined(CONFIG_CMD_SDRAM)
- "\n"
- "i2c sdram chip - print SDRAM configuration information"
+ "i2c sdram chip - print SDRAM configuration information\n"
#endif
+ "i2c speed [speed] - show or set I2C bus speed"
);
#if defined(CONFIG_I2C_MUX)
-
-int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
+static int i2c_mux_add_device(I2C_MUX_DEVICE *dev)
{
I2C_MUX_DEVICE *devtmp = i2c_mux_devices;
generated by cgit v1.2.3 (git 2.0.4) at 2024-07-03 00:09:19 +0000