[PATCH 1/2] phy: phy-mtk-tphy: Add PCIe 2 lane efuse support
Chunfeng Yun
chunfeng.yun at mediatek.com
Thu Oct 20 23:11:43 PDT 2022
On Wed, 2022-10-19 at 16:37 +0100, Daniel Golle wrote:
> From: Zhanyong Wang <zhanyong.wang at mediatek.com>
>
> Add PCIe 2 lane efuse support in tphy driver.
>
> Signed-off-by: Jie Yang <jieyy.yang at mediatek.com>
> Signed-off-by: Zhanyong Wang <zhanyong.wang at mediatek.com>
> Signed-off-by: Daniel Golle <daniel at makrotopia.org>
> ---
> drivers/phy/mediatek/phy-mtk-tphy.c | 112
> ++++++++++++++++++++++++++++
> 1 file changed, 112 insertions(+)
>
> diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c
> b/drivers/phy/mediatek/phy-mtk-tphy.c
> index e906a82791bdaa..b0c9834efec7ef 100644
> --- a/drivers/phy/mediatek/phy-mtk-tphy.c
> +++ b/drivers/phy/mediatek/phy-mtk-tphy.c
> @@ -43,6 +43,15 @@
> #define SSUSB_SIFSLV_V2_U3PHYD 0x200
> #define SSUSB_SIFSLV_V2_U3PHYA 0x400
>
> +/* version V4 sub-banks offset base address */
> +/* pcie phy banks */
> +#define SSUSB_SIFSLV_V4_SPLLC 0x000
> +#define SSUSB_SIFSLV_V4_CHIP 0x100
> +#define SSUSB_SIFSLV_V4_U3PHYD 0x900
> +#define SSUSB_SIFSLV_V4_U3PHYA 0xb00
> +
> +#define SSUSB_LN1_OFFSET 0x10000
> +
> #define U3P_MISC_REG1 0x04
> #define MR1_EFUSE_AUTO_LOAD_DIS BIT(6)
>
> @@ -268,6 +277,7 @@ enum mtk_phy_version {
> MTK_PHY_V1 = 1,
> MTK_PHY_V2,
> MTK_PHY_V3,
> + MTK_PHY_V4,
> };
>
> struct mtk_phy_pdata {
> @@ -317,6 +327,9 @@ struct mtk_phy_instance {
> u32 efuse_intr;
> u32 efuse_tx_imp;
> u32 efuse_rx_imp;
> + u32 efuse_intr_ln1;
> + u32 efuse_tx_imp_ln1;
> + u32 efuse_rx_imp_ln1;
> int eye_src;
> int eye_vrt;
> int eye_term;
> @@ -760,6 +773,36 @@ static void phy_v2_banks_init(struct mtk_tphy
> *tphy,
> }
> }
>
> +static void phy_v4_banks_init(struct mtk_tphy *tphy,
> + struct mtk_phy_instance *instance)
> +{
> + struct u2phy_banks *u2_banks = &instance->u2_banks;
> + struct u3phy_banks *u3_banks = &instance->u3_banks;
> +
> + switch (instance->type) {
> + case PHY_TYPE_USB2:
> + u2_banks->misc = instance->port_base +
> SSUSB_SIFSLV_V2_MISC;
> + u2_banks->fmreg = instance->port_base +
> SSUSB_SIFSLV_V2_U2FREQ;
> + u2_banks->com = instance->port_base +
> SSUSB_SIFSLV_V2_U2PHY_COM;
> + break;
> + case PHY_TYPE_USB3:
> + u3_banks->spllc = instance->port_base +
> SSUSB_SIFSLV_V2_SPLLC;
> + u3_banks->chip = instance->port_base +
> SSUSB_SIFSLV_V2_CHIP;
> + u3_banks->phyd = instance->port_base +
> SSUSB_SIFSLV_V2_U3PHYD;
> + u3_banks->phya = instance->port_base +
> SSUSB_SIFSLV_V2_U3PHYA;
> + break;
> + case PHY_TYPE_PCIE:
> + u3_banks->spllc = instance->port_base +
> SSUSB_SIFSLV_V4_SPLLC;
> + u3_banks->chip = instance->port_base +
> SSUSB_SIFSLV_V4_CHIP;
> + u3_banks->phyd = instance->port_base +
> SSUSB_SIFSLV_V4_U3PHYD;
> + u3_banks->phya = instance->port_base +
> SSUSB_SIFSLV_V4_U3PHYA;
> + break;
> + default:
> + dev_err(tphy->dev, "incompatible PHY type\n");
> + return;
> + }
> +}
> +
> static void phy_parse_property(struct mtk_tphy *tphy,
> struct mtk_phy_instance *instance)
> {
> @@ -951,6 +994,40 @@ static int phy_efuse_get(struct mtk_tphy *tphy,
> struct mtk_phy_instance *instanc
>
> dev_dbg(dev, "u3 efuse - intr %x, rx_imp %x, tx_imp
> %x\n",
> instance->efuse_intr, instance-
> >efuse_rx_imp,instance->efuse_tx_imp);
> +
> + if (tphy->pdata->version != MTK_PHY_V4)
> + break;
> +
> + ret = nvmem_cell_read_variable_le_u32(dev, "intr_ln1",
> &instance->efuse_intr_ln1);
> + if (ret) {
> + dev_err(dev, "fail to get u3 lane1 intr efuse,
> %d\n", ret);
> + break;
> + }
> +
> + ret = nvmem_cell_read_variable_le_u32(dev,
> "rx_imp_ln1", &instance->efuse_rx_imp_ln1);
> + if (ret) {
> + dev_err(dev, "fail to get u3 lane1 rx_imp
> efuse, %d\n", ret);
> + break;
> + }
> +
> + ret = nvmem_cell_read_variable_le_u32(dev,
> "tx_imp_ln1", &instance->efuse_tx_imp_ln1);
> + if (ret) {
> + dev_err(dev, "fail to get u3 lane1 tx_imp
> efuse, %d\n", ret);
> + break;
> + }
> +
> + /* no efuse, ignore it */
> + if (!instance->efuse_intr_ln1 &&
> + !instance->efuse_rx_imp_ln1 &&
> + !instance->efuse_tx_imp_ln1) {
> + dev_warn(dev, "no u3 lane1 efuse, but dts
> enable it\n");
> + instance->efuse_sw_en = 0;
> + break;
> + }
> +
> + dev_info(dev, "u3 lane1 efuse - intr %x, rx_imp %x,
> tx_imp %x\n",
> + instance->efuse_intr_ln1, instance-
> >efuse_rx_imp_ln1,
> + instance->efuse_tx_imp_ln1);
> break;
> default:
> dev_err(dev, "no sw efuse for type %d\n", instance-
> >type);
> @@ -990,6 +1067,31 @@ static void phy_efuse_set(struct
> mtk_phy_instance *instance)
>
> mtk_phy_update_field(u3_banks->phya + U3P_U3_PHYA_REG0,
> P3A_RG_IEXT_INTR,
> instance->efuse_intr);
> + if (instance->type == PHY_TYPE_USB3 || (
> + !instance->efuse_intr_ln1 &&
> + !instance->efuse_rx_imp_ln1 &&
> + !instance->efuse_tx_imp_ln1))
> + break;
> +
> + mtk_phy_set_bits(u3_banks->phyd + SSUSB_LN1_OFFSET +
> U3P_U3_PHYD_RSV,
> + P3D_RG_EFUSE_AUTO_LOAD_DIS);
> +
> + mtk_phy_update_field(u3_banks->phyd + SSUSB_LN1_OFFSET
> + U3P_U3_PHYD_IMPCAL0,
> + P3D_RG_TX_IMPEL, instance-
> >efuse_tx_imp_ln1);
> + mtk_phy_set_bits(u3_banks->phyd + SSUSB_LN1_OFFSET +
> U3P_U3_PHYD_IMPCAL0,
> + P3D_RG_FORCE_TX_IMPEL);
> +
> + mtk_phy_update_field(u3_banks->phyd + SSUSB_LN1_OFFSET
> + U3P_U3_PHYD_IMPCAL1,
> + P3D_RG_RX_IMPEL, instance-
> >efuse_rx_imp_ln1);
> + mtk_phy_set_bits(u3_banks->phyd + SSUSB_LN1_OFFSET +
> U3P_U3_PHYD_IMPCAL1,
> + P3D_RG_FORCE_RX_IMPEL);
> +
> + mtk_phy_update_field(u3_banks->phya + SSUSB_LN1_OFFSET
> + U3P_U3_PHYA_REG0,
> + P3A_RG_IEXT_INTR, instance-
> >efuse_intr_ln1);
> +
> + dev_info(dev, "%s set LN1 efuse, tx_imp %x, rx_imp %x
> intr %x\n",
> + __func__, instance->efuse_tx_imp_ln1,
> + instance->efuse_rx_imp_ln1, instance-
> >efuse_intr_ln1);
> break;
> default:
> dev_warn(dev, "no sw efuse for type %d\n", instance-
> >type);
> @@ -1129,6 +1231,9 @@ static struct phy *mtk_phy_xlate(struct device
> *dev,
> case MTK_PHY_V3:
> phy_v2_banks_init(tphy, instance);
> break;
> + case MTK_PHY_V4:
> + phy_v4_banks_init(tphy, instance);
> + break;
> default:
> dev_err(dev, "phy version is not supported\n");
> return ERR_PTR(-EINVAL);
> @@ -1169,6 +1274,12 @@ static const struct mtk_phy_pdata
> tphy_v3_pdata = {
> .version = MTK_PHY_V3,
> };
>
> +static const struct mtk_phy_pdata tphy_v4_pdata = {
> + .avoid_rx_sen_degradation = false,
> + .sw_efuse_supported = true,
> + .version = MTK_PHY_V4,
> +};
Please try to use hardware efuse autoload way for this case first,
there is no hardware issue, so I don't think we need use software way.
As Sam said, the hardware ip used on 7981/7986 is MTK_PHY_V2;
Thanks a lot
> +
> static const struct mtk_phy_pdata mt8173_pdata = {
> .avoid_rx_sen_degradation = true,
> .version = MTK_PHY_V1,
> @@ -1188,6 +1299,7 @@ static const struct of_device_id
> mtk_tphy_id_table[] = {
> { .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 },
> + { .compatible = "mediatek,generic-tphy-v4", .data =
> &tphy_v4_pdata },
> { },
> };
> MODULE_DEVICE_TABLE(of, mtk_tphy_id_table);
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