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ram: rk3399: Add phy pctrl reset support

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Add support for phy pctrl reset support for both channel 0, 1.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: YouMin Chen <cym@rock-chips.com>
Reviewed-by: Kever Yang <Kever.yang@rock-chips.com>
This commit is contained in:
Jagan Teki 2019-07-15 23:58:43 +05:30 • committed by Kever Yang
parent 21cf392b1f
commit 33921035be
1 changed files with 29 additions and 0 deletions
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29
drivers/ram/rockchip/sdram_rk3399.c
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@ -35,6 +35,10 @@
#define PHY_DRV_ODT_40 0xe
#define PHY_DRV_ODT_34_3 0xf
#define CRU_SFTRST_DDR_CTRL(ch, n) ((0x1 << (8 + 16 + (ch) * 4)) | \
((n) << (8 + (ch) * 4)))
#define CRU_SFTRST_DDR_PHY(ch, n) ((0x1 << (9 + 16 + (ch) * 4)) | \
((n) << (9 + (ch) * 4)))
struct chan_info {
struct rk3399_ddr_pctl_regs *pctl;
struct rk3399_ddr_pi_regs *pi;
@ -79,6 +83,29 @@ static void copy_to_reg(u32 *dest, const u32 *src, u32 n)
}
}
static void rkclk_ddr_reset(struct rk3399_cru *cru, u32 channel, u32 ctl,
u32 phy)
{
channel &= 0x1;
ctl &= 0x1;
phy &= 0x1;
writel(CRU_SFTRST_DDR_CTRL(channel, ctl) |
CRU_SFTRST_DDR_PHY(channel, phy),
&cru->softrst_con[4]);
}
static void phy_pctrl_reset(struct rk3399_cru *cru, u32 channel)
{
rkclk_ddr_reset(cru, channel, 1, 1);
udelay(10);
rkclk_ddr_reset(cru, channel, 1, 0);
udelay(10);
rkclk_ddr_reset(cru, channel, 0, 0);
udelay(10);
}
static void phy_dll_bypass_set(struct rk3399_ddr_publ_regs *ddr_publ_regs,
u32 freq)
{
@ -1129,6 +1156,7 @@ static int sdram_init(struct dram_info *dram,
{
unsigned char dramtype = params->base.dramtype;
unsigned int ddr_freq = params->base.ddr_freq;
struct rk3399_cru *cru = dram->cru;
int channel;
int ret;
@ -1145,6 +1173,7 @@ static int sdram_init(struct dram_info *dram,
const struct chan_info *chan = &dram->chan[channel];
struct rk3399_ddr_publ_regs *publ = chan->publ;
phy_pctrl_reset(cru, channel);
phy_dll_bypass_set(publ, ddr_freq);
if (channel >= params->base.num_channels)