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soc/rockchip/rk3399/sdram: Move WL training into a separate function 

Move WL training into its own function to enable better error handling.

Signed-off-by: Moritz Fischer <moritzf@google.com>
Change-Id: I7917846c51982a2473f11d14c51c270e59e59d74
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50862
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: ron minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Moritz Fischer 2021-02-17 13:39:01 -08:00 committed by ron minnich
parent f71902da5f
commit 68365e10e3
1 changed files with 51 additions and 41 deletions
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92
src/soc/rockchip/rk3399/sdram.c
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@ -654,6 +654,53 @@ static int data_training_ca(u32 channel, const struct rk3399_sdram_params *param
return 0;
}
static int data_training_wl(u32 channel, const struct rk3399_sdram_params *params)
{
u32 *denali_pi = rk3399_ddr_pi[channel]->denali_pi;
u32 *denali_phy = rk3399_ddr_publ[channel]->denali_phy;
u32 obs_0, obs_1, obs_2, obs_3, obs_err = 0;
u32 rank = params->ch[channel].rank;
u32 i, tmp;
for (i = 0; i < rank; i++) {
select_per_cs_training_index(channel, i);
/* PI_60 PI_WRLVL_EN:RW:8:2 */
clrsetbits32(&denali_pi[60], 0x3 << 8, 0x2 << 8);
/* PI_59 PI_WRLVL_REQ:WR:8:1,PI_WRLVL_CS:RW:16:2 */
clrsetbits32(&denali_pi[59], (0x1 << 8) | (0x3 << 16), (0x1 << 8) | (i << 16));
while (1) {
/* PI_174 PI_INT_STATUS:RD:8:18 */
tmp = read32(&denali_pi[174]) >> 8;
/*
* check status obs, if error maybe can not
* get leveling done PHY_40/168/296/424
* phy_wrlvl_status_obs_X:0:13
*/
obs_0 = read32(&denali_phy[40]);
obs_1 = read32(&denali_phy[168]);
obs_2 = read32(&denali_phy[296]);
obs_3 = read32(&denali_phy[424]);
if (((obs_0 >> 12) & 0x1) || ((obs_1 >> 12) & 0x1)
|| ((obs_2 >> 12) & 0x1) || ((obs_3 >> 12) & 0x1))
obs_err = 1;
if ((((tmp >> 10) & 0x1) == 0x1) && (((tmp >> 13) & 0x1) == 0x1)
&& (((tmp >> 4) & 0x1) == 0x0) && (obs_err == 0))
break;
else if ((((tmp >> 4) & 0x1) == 0x1) || (obs_err == 1))
return -1;
}
/* clear interrupt,PI_175 PI_INT_ACK:WR:0:17 */
write32((&denali_pi[175]), 0x00003f7c);
}
override_write_leveling_value(channel);
clrbits32(&denali_pi[60], 0x3 << 8);
return 0;
}
static int data_training(u32 channel, const struct rk3399_sdram_params *params,
u32 training_flag)
{
@ -694,48 +741,11 @@ static int data_training(u32 channel, const struct rk3399_sdram_params *params,
/* write leveling(LPDDR4,LPDDR3,DDR3 support) */
if ((training_flag & PI_WRITE_LEVELING) == PI_WRITE_LEVELING) {
for (i = 0; i < rank; i++) {
select_per_cs_training_index(channel, i);
/* PI_60 PI_WRLVL_EN:RW:8:2 */
clrsetbits32(&denali_pi[60], 0x3 << 8, 0x2 << 8);
/* PI_59 PI_WRLVL_REQ:WR:8:1,PI_WRLVL_CS:RW:16:2 */
clrsetbits32(&denali_pi[59],
(0x1 << 8) | (0x3 << 16),
(0x1 << 8) | (i << 16));
while (1) {
/* PI_174 PI_INT_STATUS:RD:8:18 */
tmp = read32(&denali_pi[174]) >> 8;
/*
* check status obs, if error maybe can not
* get leveling done PHY_40/168/296/424
* phy_wrlvl_status_obs_X:0:13
*/
obs_0 = read32(&denali_phy[40]);
obs_1 = read32(&denali_phy[168]);
obs_2 = read32(&denali_phy[296]);
obs_3 = read32(&denali_phy[424]);
if (((obs_0 >> 12) & 0x1) ||
((obs_1 >> 12) & 0x1) ||
((obs_2 >> 12) & 0x1) ||
((obs_3 >> 12) & 0x1))
obs_err = 1;
if ((((tmp >> 10) & 0x1) == 0x1) &&
(((tmp >> 13) & 0x1) == 0x1) &&
(((tmp >> 4) & 0x1) == 0x0) &&
(obs_err == 0))
break;
else if ((((tmp >> 4) & 0x1) == 0x1) ||
(obs_err == 1))
return -1;
ret = data_training_wl(channel, params);
if (ret) {
printk(BIOS_ERR, "WL training failed\n");
return ret;
}
/* clear interrupt,PI_175 PI_INT_ACK:WR:0:17 */
write32((&denali_pi[175]), 0x00003f7c);
}
override_write_leveling_value(channel);
clrbits32(&denali_pi[60], 0x3 << 8);
}
/* read gate training(LPDDR4,LPDDR3,DDR3 support) */