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board: sifive: unmatched: refine GEMGXL initialized function in SPL

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Create a new function spl_reset_device_by_gpio to reset the device
whose reset pin is connected to the GPIO. Then, using this function
to initialize GEMGXL.

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
This commit is contained in:
Vincent Chen
2021-07-08 09:08:20 +08:00
committed by Leo Yu-Chi Liang
parent e52b83ab13
commit d3c96b9b46
1 changed files with 45 additions and 25 deletions
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70
board/sifive/unmatched/spl.c
View File

@@ -22,6 +22,45 @@
#define MODE_SELECT_SD 0xb
#define MODE_SELECT_MASK GENMASK(3, 0)
static inline int spl_reset_device_by_gpio(const char *label, int pin, int low_width)
{
int ret;
ret = gpio_request(pin, label);
if (ret) {
debug("%s gpio request failed: %d\n", label, ret);
return ret;
}
ret = gpio_direction_output(pin, 1);
if (ret) {
debug("%s gpio direction set failed: %d\n", label, ret);
return ret;
}
udelay(1);
gpio_set_value(pin, 0);
udelay(low_width);
gpio_set_value(pin, 1);
return ret;
}
static inline int spl_gemgxl_init(void)
{
int ret;
/*
* GEMGXL init VSC8541 PHY reset sequence;
* leave pull-down active for 2ms
*/
udelay(2000);
ret = spl_reset_device_by_gpio("gem_phy_reset", GEM_PHY_RESET, 1);
mdelay(15);
return ret;
}
int spl_board_init_f(void)
{
int ret;
@@ -29,36 +68,17 @@ int spl_board_init_f(void)
ret = spl_soc_init();
if (ret) {
debug("HiFive Unmatched FU740 SPL init failed: %d\n", ret);
return ret;
goto end;
}
/*
* GEMGXL init VSC8541 PHY reset sequence;
* leave pull-down active for 2ms
*/
udelay(2000);
ret = gpio_request(GEM_PHY_RESET, "gem_phy_reset");
ret = spl_gemgxl_init();
if (ret) {
debug("gem_phy_reset gpio request failed: %d\n", ret);
return ret;
debug("Gigabit ethernet PHY (VSC8541) init failed: %d\n", ret);
goto end;
}
/* Set GPIO 12 (PHY NRESET) */
ret = gpio_direction_output(GEM_PHY_RESET, 1);
if (ret) {
debug("gem_phy_reset gpio direction set failed: %d\n", ret);
return ret;
}
udelay(1);
/* Reset PHY again to enter unmanaged mode */
gpio_set_value(GEM_PHY_RESET, 0);
udelay(1);
gpio_set_value(GEM_PHY_RESET, 1);
mdelay(15);
return 0;
end:
return ret;
}
u32 spl_boot_device(void)