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davinci: enbw_cmc: change switch init behaviour

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change the behaviour of switch initialization:

- rename "pwl" to "lan" in hwconfig parameter
  "lan" = port 1 with phy addr 2
  "lmn" = port 2 with phy addr 3

- if we have a valid switch config file in flash, do not
  evaluate the settings in the hwconfig "lan" or "lmn"
  subcommand.

- if we have no valid switch config file in flash, start
  the switch with default values, if we have a "lan" or
  a "lmn" hwconfig subcommand. If no "lan" or "lmn" is
  found in hwconfig, do nothing with the switch.

Signed-off-by: Heiko Schocher <hs@denx.de>
This commit is contained in:
Heiko Schocher 2012-08-13 23:51:04 +00:00 • committed by Albert ARIBAUD
parent 6995a28937
commit 1bb0946b5c
1 changed files with 69 additions and 33 deletions
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84
board/enbw/enbw_cmc/enbw_cmc.c
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@ -451,25 +451,15 @@ static char *enbw_cmc_getvalue(char *ptr, int *value)
return ptr;
}
static int enbw_cmc_config_switch(unsigned long addr)
static struct spi_slave *enbw_cmc_init_spi(void)
{
struct spi_slave *spi;
char *ptr = (char *)addr;
int value, reg;
int ret;
int bus, cs, max_hz, spi_mode;
debug("configure switch with file on addr: 0x%lx\n", addr);
bus = 0;
cs = 0;
max_hz = 1000000;
spi_mode = 0;
spi = spi_setup_slave(bus, cs, max_hz, spi_mode);
spi = spi_setup_slave(0, 0, 1000000, 0);
if (!spi) {
printf("Failed to set up slave\n");
return -EINVAL;
return NULL;
}
ret = spi_claim_bus(spi);
@ -480,25 +470,45 @@ static int enbw_cmc_config_switch(unsigned long addr)
ret = enbw_cmc_switch_read_ident(spi);
if (ret)
goto err_claim_bus;
goto err_read;
return spi;
err_read:
spi_release_bus(spi);
err_claim_bus:
spi_free_slave(spi);
return NULL;
}
static int enbw_cmc_config_switch(unsigned long addr)
{
struct spi_slave *spi;
char *ptr = (char *)addr;
int value, reg;
int ret = 0;
debug("configure switch with file on addr: 0x%lx\n", addr);
spi = enbw_cmc_init_spi();
if (!spi)
return -EINVAL;
ptr = (char *)addr;
while (ptr != NULL) {
ptr = enbw_cmc_getvalue(ptr, &reg);
if (ptr != NULL) {
ptr = enbw_cmc_getvalue(ptr, &value);
if ((ptr != NULL) && (value >= 0))
if (enbw_cmc_switch_write(spi, reg, value))
goto err_read;
if (enbw_cmc_switch_write(spi, reg, value)) {
/* error writing to switch */
ptr = NULL;
ret = -EINVAL;
}
}
}
return 0;
err_read:
spi_release_bus(spi);
err_claim_bus:
spi_free_slave(spi);
return -EINVAL;
return ret;
}
static int do_switch(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
@ -524,8 +534,10 @@ U_BOOT_CMD(switch, 3, 1, do_switch,
*/
int board_eth_init(bd_t *bis)
{
struct spi_slave *spi;
const char *s;
size_t len;
size_t len = 0;
int config = 1;
davinci_emac_mii_mode_sel(0);
@ -534,25 +546,49 @@ int board_eth_init(bd_t *bis)
if (len) {
unsigned long addr = simple_strtoul(s, NULL, 16);
enbw_cmc_config_switch(addr);
config = enbw_cmc_config_switch(addr);
}
if (config) {
/*
* no valid config file -> do we have some args in
* hwconfig ?
*/
if ((hwconfig_subarg("switch", "lan", &len)) ||
(hwconfig_subarg("switch", "lmn", &len))) {
/* If so start switch */
spi = enbw_cmc_init_spi();
if (spi) {
if (enbw_cmc_switch_write(spi, 1, 0))
config = 0;
udelay(10000);
if (enbw_cmc_switch_write(spi, 1, 1))
config = 0;
spi_release_bus(spi);
spi_free_slave(spi);
}
} else {
config = 0;
}
}
if (!davinci_emac_initialize()) {
printf("Error: Ethernet init failed!\n");
return -1;
}
if (config) {
if (hwconfig_subarg_cmp("switch", "lan", "on"))
/* Switch port lan on */
enbw_cmc_switch(1, 1);
else
enbw_cmc_switch(1, 0);
if (hwconfig_subarg_cmp("switch", "pwl", "on"))
if (hwconfig_subarg_cmp("switch", "lmn", "on"))
/* Switch port pwl on */
enbw_cmc_switch(2, 1);
else
enbw_cmc_switch(2, 0);
}
return 0;
}