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phy: sun4i-usb: Support A83T USB PHYs 

The A83T has 3 USB PHYs, 1 for OTG, 1 for standard USB, 1 for USB HSIC.
The phy initialization procedure is very different from other SoCs, but
the PMU bits are the same, with additional bits for HSIC.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Chen-Yu Tsai 2017-08-03 16:14:07 +08:00 committed by Kishon Vijay Abraham I
parent f0152c58c6
commit 4b63743cdb
1 changed files with 56 additions and 14 deletions
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70
drivers/phy/allwinner/phy-sun4i-usb.c
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@ -87,6 +87,16 @@
#define PHY_DISCON_TH_SEL 0x2a
#define PHY_SQUELCH_DETECT 0x3c
/* A83T specific control bits for PHY0 */
#define PHY_CTL_VBUSVLDEXT BIT(5)
#define PHY_CTL_SIDDQ BIT(3)
/* A83T specific control bits for PHY2 HSIC */
#define SUNXI_EHCI_HS_FORCE BIT(20)
#define SUNXI_HSIC_CONNECT_DET BIT(17)
#define SUNXI_HSIC_CONNECT_INT BIT(16)
#define SUNXI_HSIC BIT(1)
#define MAX_PHYS 4
/*
@ -100,6 +110,7 @@ enum sun4i_usb_phy_type {
sun4i_a10_phy,
sun6i_a31_phy,
sun8i_a33_phy,
sun8i_a83t_phy,
sun8i_h3_phy,
sun8i_v3s_phy,
sun50i_a64_phy,
@ -234,6 +245,7 @@ static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
{
struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
u32 bits, reg_value;
if (!phy->pmu)
@ -242,6 +254,11 @@ static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
/* A83T USB2 is HSIC */
if (phy_data->cfg->type == sun8i_a83t_phy && phy->index == 2)
bits |= SUNXI_EHCI_HS_FORCE | SUNXI_HSIC_CONNECT_INT |
SUNXI_HSIC;
reg_value = readl(phy->pmu);
if (enable)
@ -276,22 +293,31 @@ static int sun4i_usb_phy_init(struct phy *_phy)
return ret;
}
if (phy->pmu && data->cfg->enable_pmu_unk1) {
val = readl(phy->pmu + REG_PMU_UNK1);
writel(val & ~2, phy->pmu + REG_PMU_UNK1);
if (data->cfg->type == sun8i_a83t_phy) {
if (phy->index == 0) {
val = readl(data->base + data->cfg->phyctl_offset);
val |= PHY_CTL_VBUSVLDEXT;
val &= ~PHY_CTL_SIDDQ;
writel(val, data->base + data->cfg->phyctl_offset);
}
} else {
if (phy->pmu && data->cfg->enable_pmu_unk1) {
val = readl(phy->pmu + REG_PMU_UNK1);
writel(val & ~2, phy->pmu + REG_PMU_UNK1);
}
/* Enable USB 45 Ohm resistor calibration */
if (phy->index == 0)
sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
/* Adjust PHY's magnitude and rate */
sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
/* Disconnect threshold adjustment */
sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
data->cfg->disc_thresh, 2);
}
/* Enable USB 45 Ohm resistor calibration */
if (phy->index == 0)
sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
/* Adjust PHY's magnitude and rate */
sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
/* Disconnect threshold adjustment */
sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
data->cfg->disc_thresh, 2);
sun4i_usb_phy_passby(phy, 1);
if (phy->index == 0) {
@ -316,6 +342,13 @@ static int sun4i_usb_phy_exit(struct phy *_phy)
struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
if (phy->index == 0) {
if (data->cfg->type == sun8i_a83t_phy) {
void __iomem *phyctl = data->base +
data->cfg->phyctl_offset;
writel(readl(phyctl) | PHY_CTL_SIDDQ, phyctl);
}
/* Disable pull-ups */
sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0);
sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0);
@ -868,6 +901,14 @@ static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = {
.enable_pmu_unk1 = false,
};
static const struct sun4i_usb_phy_cfg sun8i_a83t_cfg = {
.num_phys = 3,
.hsic_index = 2,
.type = sun8i_a83t_phy,
.phyctl_offset = REG_PHYCTL_A33,
.dedicated_clocks = true,
};
static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
.num_phys = 4,
.type = sun8i_h3_phy,
@ -904,6 +945,7 @@ static const struct of_device_id sun4i_usb_phy_of_match[] = {
{ .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg },
{ .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg },
{ .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg },
{ .compatible = "allwinner,sun8i-a83t-usb-phy", .data = &sun8i_a83t_cfg },
{ .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
{ .compatible = "allwinner,sun8i-v3s-usb-phy", .data = &sun8i_v3s_cfg },
{ .compatible = "allwinner,sun50i-a64-usb-phy",