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path: root/drivers/phy/mediatek/phy-mtk-tphy.c
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Diffstat (limited to 'drivers/phy/mediatek/phy-mtk-tphy.c')
-rw-r--r--drivers/phy/mediatek/phy-mtk-tphy.c224
1 files changed, 180 insertions, 44 deletions
diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
index 731c483a04de..cdcef865fe9e 100644
--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -10,11 +10,13 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/iopoll.h>
+#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
/* version V1 sub-banks offset base address */
/* banks shared by multiple phys */
@@ -27,7 +29,8 @@
#define SSUSB_SIFSLV_V1_U3PHYD 0x000
#define SSUSB_SIFSLV_V1_U3PHYA 0x200
-/* version V2 sub-banks offset base address */
+/* version V2/V3 sub-banks offset base address */
+/* V3: U2FREQ is not used anymore, but reserved */
/* u2 phy banks */
#define SSUSB_SIFSLV_V2_MISC 0x000
#define SSUSB_SIFSLV_V2_U2FREQ 0x100
@@ -40,6 +43,8 @@
#define U3P_USBPHYACR0 0x000
#define PA0_RG_U2PLL_FORCE_ON BIT(15)
+#define PA0_USB20_PLL_PREDIV GENMASK(7, 6)
+#define PA0_USB20_PLL_PREDIV_VAL(x) ((0x3 & (x)) << 6)
#define PA0_RG_USB20_INTR_EN BIT(5)
#define U3P_USBPHYACR1 0x004
@@ -51,6 +56,8 @@
#define PA1_RG_TERM_SEL_VAL(x) ((0x7 & (x)) << 8)
#define U3P_USBPHYACR2 0x008
+#define PA2_RG_U2PLL_BW GENMASK(21, 19)
+#define PA2_RG_U2PLL_BW_VAL(x) ((0x7 & (x)) << 19)
#define PA2_RG_SIF_U2PLL_FORCE_EN BIT(18)
#define U3P_USBPHYACR5 0x014
@@ -72,6 +79,14 @@
#define P2C_USB20_GPIO_MODE BIT(8)
#define P2C_U2_GPIO_CTR_MSK (P2C_RG_USB20_GPIO_CTL | P2C_USB20_GPIO_MODE)
+#define U3P_U2PHYA_RESV 0x030
+#define P2R_RG_U2PLL_FBDIV_26M 0x1bb13b
+#define P2R_RG_U2PLL_FBDIV_48M 0x3c0000
+
+#define U3P_U2PHYA_RESV1 0x044
+#define P2R_RG_U2PLL_REFCLK_SEL BIT(5)
+#define P2R_RG_U2PLL_FRA_EN BIT(3)
+
#define U3D_U2PHYDCR0 0x060
#define P2C_RG_SIF_U2PLL_FORCE_ON BIT(24)
@@ -267,14 +282,31 @@
#define RG_CDR_BIRLTD0_GEN3_MSK GENMASK(4, 0)
#define RG_CDR_BIRLTD0_GEN3_VAL(x) (0x1f & (x))
+/* PHY switch between pcie/usb3/sgmii/sata */
+#define USB_PHY_SWITCH_CTRL 0x0
+#define RG_PHY_SW_TYPE GENMASK(3, 0)
+#define RG_PHY_SW_PCIE 0x0
+#define RG_PHY_SW_USB3 0x1
+#define RG_PHY_SW_SGMII 0x2
+#define RG_PHY_SW_SATA 0x3
+
+#define TPHY_CLKS_CNT 2
+
enum mtk_phy_version {
MTK_PHY_V1 = 1,
MTK_PHY_V2,
+ MTK_PHY_V3,
};
struct mtk_phy_pdata {
/* avoid RX sensitivity level degradation only for mt8173 */
bool avoid_rx_sen_degradation;
+ /*
+ * workaround only for mt8195, HW fix it for others of V3,
+ * u2phy should use integer mode instead of fractional mode of
+ * 48M PLL, fix it by switching PLL to 26M from default 48M
+ */
+ bool sw_pll_48m_to_26m;
enum mtk_phy_version version;
};
@@ -298,10 +330,12 @@ struct mtk_phy_instance {
struct u2phy_banks u2_banks;
struct u3phy_banks u3_banks;
};
- struct clk *ref_clk; /* reference clock of (digital) phy */
- struct clk *da_ref_clk; /* reference clock of analog phy */
+ struct clk_bulk_data clks[TPHY_CLKS_CNT];
u32 index;
- u8 type;
+ u32 type;
+ struct regmap *type_sw;
+ u32 type_sw_reg;
+ u32 type_sw_index;
int eye_src;
int eye_vrt;
int eye_term;
@@ -330,6 +364,10 @@ static void hs_slew_rate_calibrate(struct mtk_tphy *tphy,
int fm_out;
u32 tmp;
+ /* HW V3 doesn't support slew rate cal anymore */
+ if (tphy->pdata->version == MTK_PHY_V3)
+ return;
+
/* use force value */
if (instance->eye_src)
return;
@@ -450,6 +488,33 @@ static void u3_phy_instance_init(struct mtk_tphy *tphy,
dev_dbg(tphy->dev, "%s(%d)\n", __func__, instance->index);
}
+static void u2_phy_pll_26m_set(struct mtk_tphy *tphy,
+ struct mtk_phy_instance *instance)
+{
+ struct u2phy_banks *u2_banks = &instance->u2_banks;
+ void __iomem *com = u2_banks->com;
+ u32 tmp;
+
+ if (!tphy->pdata->sw_pll_48m_to_26m)
+ return;
+
+ tmp = readl(com + U3P_USBPHYACR0);
+ tmp &= ~PA0_USB20_PLL_PREDIV;
+ tmp |= PA0_USB20_PLL_PREDIV_VAL(0);
+ writel(tmp, com + U3P_USBPHYACR0);
+
+ tmp = readl(com + U3P_USBPHYACR2);
+ tmp &= ~PA2_RG_U2PLL_BW;
+ tmp |= PA2_RG_U2PLL_BW_VAL(3);
+ writel(tmp, com + U3P_USBPHYACR2);
+
+ writel(P2R_RG_U2PLL_FBDIV_26M, com + U3P_U2PHYA_RESV);
+
+ tmp = readl(com + U3P_U2PHYA_RESV1);
+ tmp |= P2R_RG_U2PLL_FRA_EN | P2R_RG_U2PLL_REFCLK_SEL;
+ writel(tmp, com + U3P_U2PHYA_RESV1);
+}
+
static void u2_phy_instance_init(struct mtk_tphy *tphy,
struct mtk_phy_instance *instance)
{
@@ -509,6 +574,9 @@ static void u2_phy_instance_init(struct mtk_tphy *tphy,
tmp |= PA6_RG_U2_SQTH_VAL(2);
writel(tmp, com + U3P_USBPHYACR6);
+ /* Workaround only for mt8195, HW fix it for others (V3) */
+ u2_phy_pll_26m_set(tphy, instance);
+
dev_dbg(tphy->dev, "%s(%d)\n", __func__, index);
}
@@ -878,7 +946,7 @@ static void u2_phy_props_set(struct mtk_tphy *tphy,
writel(tmp, com + U3P_U2PHYBC12C);
}
- if (instance->eye_src) {
+ if (tphy->pdata->version < MTK_PHY_V3 && instance->eye_src) {
tmp = readl(com + U3P_USBPHYACR5);
tmp &= ~PA5_RG_U2_HSTX_SRCTRL;
tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(instance->eye_src);
@@ -914,24 +982,73 @@ static void u2_phy_props_set(struct mtk_tphy *tphy,
}
}
-static int mtk_phy_init(struct phy *phy)
+/* type switch for usb3/pcie/sgmii/sata */
+static int phy_type_syscon_get(struct mtk_phy_instance *instance,
+ struct device_node *dn)
{
- struct mtk_phy_instance *instance = phy_get_drvdata(phy);
- struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);
+ struct of_phandle_args args;
int ret;
- ret = clk_prepare_enable(instance->ref_clk);
- if (ret) {
- dev_err(tphy->dev, "failed to enable ref_clk\n");
+ /* type switch function is optional */
+ if (!of_property_read_bool(dn, "mediatek,syscon-type"))
+ return 0;
+
+ ret = of_parse_phandle_with_fixed_args(dn, "mediatek,syscon-type",
+ 2, 0, &args);
+ if (ret)
return ret;
+
+ instance->type_sw_reg = args.args[0];
+ instance->type_sw_index = args.args[1] & 0x3; /* <=3 */
+ instance->type_sw = syscon_node_to_regmap(args.np);
+ of_node_put(args.np);
+ dev_info(&instance->phy->dev, "type_sw - reg %#x, index %d\n",
+ instance->type_sw_reg, instance->type_sw_index);
+
+ return PTR_ERR_OR_ZERO(instance->type_sw);
+}
+
+static int phy_type_set(struct mtk_phy_instance *instance)
+{
+ int type;
+ u32 mask;
+
+ if (!instance->type_sw)
+ return 0;
+
+ switch (instance->type) {
+ case PHY_TYPE_USB3:
+ type = RG_PHY_SW_USB3;
+ break;
+ case PHY_TYPE_PCIE:
+ type = RG_PHY_SW_PCIE;
+ break;
+ case PHY_TYPE_SGMII:
+ type = RG_PHY_SW_SGMII;
+ break;
+ case PHY_TYPE_SATA:
+ type = RG_PHY_SW_SATA;
+ break;
+ case PHY_TYPE_USB2:
+ default:
+ return 0;
}
- ret = clk_prepare_enable(instance->da_ref_clk);
- if (ret) {
- dev_err(tphy->dev, "failed to enable da_ref\n");
- clk_disable_unprepare(instance->ref_clk);
+ mask = RG_PHY_SW_TYPE << (instance->type_sw_index * BITS_PER_BYTE);
+ regmap_update_bits(instance->type_sw, instance->type_sw_reg, mask, type);
+
+ return 0;
+}
+
+static int mtk_phy_init(struct phy *phy)
+{
+ struct mtk_phy_instance *instance = phy_get_drvdata(phy);
+ struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);
+ int ret;
+
+ ret = clk_bulk_prepare_enable(TPHY_CLKS_CNT, instance->clks);
+ if (ret)
return ret;
- }
switch (instance->type) {
case PHY_TYPE_USB2:
@@ -947,10 +1064,12 @@ static int mtk_phy_init(struct phy *phy)
case PHY_TYPE_SATA:
sata_phy_instance_init(tphy, instance);
break;
+ case PHY_TYPE_SGMII:
+ /* nothing to do, only used to set type */
+ break;
default:
dev_err(tphy->dev, "incompatible PHY type\n");
- clk_disable_unprepare(instance->ref_clk);
- clk_disable_unprepare(instance->da_ref_clk);
+ clk_bulk_disable_unprepare(TPHY_CLKS_CNT, instance->clks);
return -EINVAL;
}
@@ -993,8 +1112,7 @@ static int mtk_phy_exit(struct phy *phy)
if (instance->type == PHY_TYPE_USB2)
u2_phy_instance_exit(tphy, instance);
- clk_disable_unprepare(instance->ref_clk);
- clk_disable_unprepare(instance->da_ref_clk);
+ clk_bulk_disable_unprepare(TPHY_CLKS_CNT, instance->clks);
return 0;
}
@@ -1037,21 +1155,27 @@ static struct phy *mtk_phy_xlate(struct device *dev,
if (!(instance->type == PHY_TYPE_USB2 ||
instance->type == PHY_TYPE_USB3 ||
instance->type == PHY_TYPE_PCIE ||
- instance->type == PHY_TYPE_SATA)) {
+ instance->type == PHY_TYPE_SATA ||
+ instance->type == PHY_TYPE_SGMII)) {
dev_err(dev, "unsupported device type: %d\n", instance->type);
return ERR_PTR(-EINVAL);
}
- if (tphy->pdata->version == MTK_PHY_V1) {
+ switch (tphy->pdata->version) {
+ case MTK_PHY_V1:
phy_v1_banks_init(tphy, instance);
- } else if (tphy->pdata->version == MTK_PHY_V2) {
+ break;
+ case MTK_PHY_V2:
+ case MTK_PHY_V3:
phy_v2_banks_init(tphy, instance);
- } else {
+ break;
+ default:
dev_err(dev, "phy version is not supported\n");
return ERR_PTR(-EINVAL);
}
phy_parse_property(tphy, instance);
+ phy_type_set(instance);
return instance->phy;
}
@@ -1075,17 +1199,28 @@ static const struct mtk_phy_pdata tphy_v2_pdata = {
.version = MTK_PHY_V2,
};
+static const struct mtk_phy_pdata tphy_v3_pdata = {
+ .version = MTK_PHY_V3,
+};
+
static const struct mtk_phy_pdata mt8173_pdata = {
.avoid_rx_sen_degradation = true,
.version = MTK_PHY_V1,
};
+static const struct mtk_phy_pdata mt8195_pdata = {
+ .sw_pll_48m_to_26m = true,
+ .version = MTK_PHY_V3,
+};
+
static const struct of_device_id mtk_tphy_id_table[] = {
{ .compatible = "mediatek,mt2701-u3phy", .data = &tphy_v1_pdata },
{ .compatible = "mediatek,mt2712-u3phy", .data = &tphy_v2_pdata },
{ .compatible = "mediatek,mt8173-u3phy", .data = &mt8173_pdata },
+ { .compatible = "mediatek,mt8195-tphy", .data = &mt8195_pdata },
{ .compatible = "mediatek,generic-tphy-v1", .data = &tphy_v1_pdata },
{ .compatible = "mediatek,generic-tphy-v2", .data = &tphy_v2_pdata },
+ { .compatible = "mediatek,generic-tphy-v3", .data = &tphy_v3_pdata },
{ },
};
MODULE_DEVICE_TABLE(of, mtk_tphy_id_table);
@@ -1129,16 +1264,21 @@ static int mtk_tphy_probe(struct platform_device *pdev)
}
}
- tphy->src_ref_clk = U3P_REF_CLK;
- tphy->src_coef = U3P_SLEW_RATE_COEF;
- /* update parameters of slew rate calibrate if exist */
- device_property_read_u32(dev, "mediatek,src-ref-clk-mhz",
- &tphy->src_ref_clk);
- device_property_read_u32(dev, "mediatek,src-coef", &tphy->src_coef);
+ if (tphy->pdata->version < MTK_PHY_V3) {
+ tphy->src_ref_clk = U3P_REF_CLK;
+ tphy->src_coef = U3P_SLEW_RATE_COEF;
+ /* update parameters of slew rate calibrate if exist */
+ device_property_read_u32(dev, "mediatek,src-ref-clk-mhz",
+ &tphy->src_ref_clk);
+ device_property_read_u32(dev, "mediatek,src-coef",
+ &tphy->src_coef);
+ }
port = 0;
for_each_child_of_node(np, child_np) {
struct mtk_phy_instance *instance;
+ struct clk_bulk_data *clks;
+ struct device *subdev;
struct phy *phy;
instance = devm_kzalloc(dev, sizeof(*instance), GFP_KERNEL);
@@ -1156,16 +1296,16 @@ static int mtk_tphy_probe(struct platform_device *pdev)
goto put_child;
}
+ subdev = &phy->dev;
retval = of_address_to_resource(child_np, 0, &res);
if (retval) {
- dev_err(dev, "failed to get address resource(id-%d)\n",
+ dev_err(subdev, "failed to get address resource(id-%d)\n",
port);
goto put_child;
}
- instance->port_base = devm_ioremap_resource(&phy->dev, &res);
+ instance->port_base = devm_ioremap_resource(subdev, &res);
if (IS_ERR(instance->port_base)) {
- dev_err(dev, "failed to remap phy regs\n");
retval = PTR_ERR(instance->port_base);
goto put_child;
}
@@ -1175,20 +1315,16 @@ static int mtk_tphy_probe(struct platform_device *pdev)
phy_set_drvdata(phy, instance);
port++;
- instance->ref_clk = devm_clk_get_optional(&phy->dev, "ref");
- if (IS_ERR(instance->ref_clk)) {
- dev_err(dev, "failed to get ref_clk(id-%d)\n", port);
- retval = PTR_ERR(instance->ref_clk);
+ clks = instance->clks;
+ clks[0].id = "ref"; /* digital (& analog) clock */
+ clks[1].id = "da_ref"; /* analog clock */
+ retval = devm_clk_bulk_get_optional(subdev, TPHY_CLKS_CNT, clks);
+ if (retval)
goto put_child;
- }
- instance->da_ref_clk =
- devm_clk_get_optional(&phy->dev, "da_ref");
- if (IS_ERR(instance->da_ref_clk)) {
- dev_err(dev, "failed to get da_ref_clk(id-%d)\n", port);
- retval = PTR_ERR(instance->da_ref_clk);
+ retval = phy_type_syscon_get(instance, child_np);
+ if (retval)
goto put_child;
- }
}
provider = devm_of_phy_provider_register(dev, mtk_phy_xlate);
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-31 18:23:37 +0300