This adds driver for the PCIe/USB3.0/SATA phy found on Rockchip RK3568 SoCs. The driver has been taken from the Rockchip downstream Kernel repository. Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> --- drivers/phy/rockchip/Kconfig | 7 + drivers/phy/rockchip/Makefile | 1 + .../rockchip/phy-rockchip-naneng-combphy.c | 614 ++++++++++++++++++ 3 files changed, 622 insertions(+) create mode 100644 drivers/phy/rockchip/phy-rockchip-naneng-combphy.c diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig index d6ae308aa1..37a514059e 100644 --- a/drivers/phy/rockchip/Kconfig +++ b/drivers/phy/rockchip/Kconfig @@ -5,3 +5,10 @@ config PHY_ROCKCHIP_INNO_USB2 help Support for Rockchip USB2.0 PHY with Innosilicon IP block. +config PHY_ROCKCHIP_NANENG_COMBO_PHY + bool "Rockchip NANENG COMBO PHY Driver" + depends on ARCH_ROCKCHIP && OFDEVICE + help + Enable this to support the Rockchip PCIe/USB3.0/SATA/QSGMII + combo PHY with NaNeng IP block. + diff --git a/drivers/phy/rockchip/Makefile b/drivers/phy/rockchip/Makefile index 811f12bc60..4d75d610ef 100644 --- a/drivers/phy/rockchip/Makefile +++ b/drivers/phy/rockchip/Makefile @@ -1 +1,2 @@ obj-$(CONFIG_PHY_ROCKCHIP_INNO_USB2) += phy-rockchip-inno-usb2.o +obj-$(CONFIG_PHY_ROCKCHIP_NANENG_COMBO_PHY) += phy-rockchip-naneng-combphy.o diff --git a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c new file mode 100644 index 0000000000..a8d7fd13d8 --- /dev/null +++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c @@ -0,0 +1,614 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Rockchip PIPE USB3.0 PCIE SATA combphy driver + * + * Copyright (C) 2020 Rockchip Electronics Co., Ltd. + */ + +#include <common.h> +#include <init.h> +#include <io.h> +#include <of.h> +#include <errno.h> +#include <driver.h> +#include <malloc.h> +#include <usb/phy.h> +#include <linux/phy/phy.h> +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/reset.h> +#include <mfd/syscon.h> +#include <linux/iopoll.h> +#include <dt-bindings/phy/phy.h> + +#define BIT_WRITEABLE_SHIFT 16 + +struct rockchip_combphy_priv; + +struct combphy_reg { + u16 offset; + u16 bitend; + u16 bitstart; + u16 disable; + u16 enable; +}; + +struct rockchip_combphy_grfcfg { + struct combphy_reg pcie_mode_set; + struct combphy_reg usb_mode_set; + struct combphy_reg sgmii_mode_set; + struct combphy_reg qsgmii_mode_set; + struct combphy_reg pipe_rxterm_set; + struct combphy_reg pipe_txelec_set; + struct combphy_reg pipe_txcomp_set; + struct combphy_reg pipe_clk_25m; + struct combphy_reg pipe_clk_100m; + struct combphy_reg pipe_phymode_sel; + struct combphy_reg pipe_rate_sel; + struct combphy_reg pipe_rxterm_sel; + struct combphy_reg pipe_txelec_sel; + struct combphy_reg pipe_txcomp_sel; + struct combphy_reg pipe_clk_ext; + struct combphy_reg pipe_sel_usb; + struct combphy_reg pipe_sel_qsgmii; + struct combphy_reg pipe_phy_status; + struct combphy_reg con0_for_pcie; + struct combphy_reg con1_for_pcie; + struct combphy_reg con2_for_pcie; + struct combphy_reg con3_for_pcie; + struct combphy_reg con0_for_sata; + struct combphy_reg con1_for_sata; + struct combphy_reg con2_for_sata; + struct combphy_reg con3_for_sata; + struct combphy_reg pipe_con0_for_sata; + struct combphy_reg pipe_sgmii_mac_sel; + struct combphy_reg pipe_xpcs_phy_ready; + struct combphy_reg u3otg0_port_en; + struct combphy_reg u3otg1_port_en; +}; + +struct rockchip_combphy_cfg { + const int num_clks; + const struct clk_bulk_data *clks; + const struct rockchip_combphy_grfcfg *grfcfg; + int (*combphy_cfg)(struct rockchip_combphy_priv *priv); +}; + +struct rockchip_combphy_priv { + u8 mode; + void __iomem *mmio; + int num_clks; + struct clk_bulk_data *clks; + struct device_d *dev; + struct regmap *pipe_grf; + struct regmap *phy_grf; + struct phy *phy; + struct reset_control *apb_rst; + struct reset_control *phy_rst; + const struct rockchip_combphy_cfg *cfg; +}; + +static inline bool param_read(struct regmap *base, + const struct combphy_reg *reg, u32 val) +{ + int ret; + u32 mask, orig, tmp; + + ret = regmap_read(base, reg->offset, &orig); + if (ret) + return false; + + mask = GENMASK(reg->bitend, reg->bitstart); + tmp = (orig & mask) >> reg->bitstart; + + return tmp == val; +} + +static int param_write(struct regmap *base, + const struct combphy_reg *reg, bool en) +{ + u32 val, mask, tmp; + + tmp = en ? reg->enable : reg->disable; + mask = GENMASK(reg->bitend, reg->bitstart); + val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT); + + return regmap_write(base, reg->offset, val); +} + +static u32 rockchip_combphy_is_ready(struct rockchip_combphy_priv *priv) +{ + const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg; + u32 mask, val; + + mask = GENMASK(cfg->pipe_phy_status.bitend, + cfg->pipe_phy_status.bitstart); + + regmap_read(priv->phy_grf, cfg->pipe_phy_status.offset, &val); + val = (val & mask) >> cfg->pipe_phy_status.bitstart; + + return val; +} + +static int rockchip_combphy_pcie_init(struct rockchip_combphy_priv *priv) +{ + int ret = 0; + + if (priv->cfg->combphy_cfg) { + ret = priv->cfg->combphy_cfg(priv); + if (ret) { + dev_err(priv->dev, "failed to init phy for pcie\n"); + return ret; + } + } + + return ret; +} + +static int rockchip_combphy_usb3_init(struct rockchip_combphy_priv *priv) +{ + int ret = 0; + + if (priv->cfg->combphy_cfg) { + ret = priv->cfg->combphy_cfg(priv); + if (ret) { + dev_err(priv->dev, "failed to init phy for usb3\n"); + return ret; + } + } + + return ret; +} + +static int rockchip_combphy_sata_init(struct rockchip_combphy_priv *priv) +{ + int ret = 0; + + if (priv->cfg->combphy_cfg) { + ret = priv->cfg->combphy_cfg(priv); + if (ret) { + dev_err(priv->dev, "failed to init phy for sata\n"); + return ret; + } + } + + return ret; +} + +static int rockchip_combphy_sgmii_init(struct rockchip_combphy_priv *priv) +{ + int ret = 0; + + if (priv->cfg->combphy_cfg) { + ret = priv->cfg->combphy_cfg(priv); + if (ret) { + dev_err(priv->dev, "failed to init phy for sgmii\n"); + return ret; + } + } + + return ret; +} + +static int rockchip_combphy_set_mode(struct rockchip_combphy_priv *priv) +{ + switch (priv->mode) { + case PHY_TYPE_PCIE: + rockchip_combphy_pcie_init(priv); + break; + case PHY_TYPE_USB3: + rockchip_combphy_usb3_init(priv); + break; + case PHY_TYPE_SATA: + rockchip_combphy_sata_init(priv); + break; + case PHY_TYPE_SGMII: + case PHY_TYPE_QSGMII: + return rockchip_combphy_sgmii_init(priv); + default: + dev_err(priv->dev, "incompatible PHY type\n"); + return -EINVAL; + } + + return 0; +} + +static int rockchip_combphy_init(struct phy *phy) +{ + struct rockchip_combphy_priv *priv = phy_get_drvdata(phy); + const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg; + u32 val; + int ret; + + ret = clk_bulk_enable(priv->num_clks, priv->clks); + if (ret) { + dev_err(priv->dev, "failed to enable clks\n"); + return ret; + } + + ret = rockchip_combphy_set_mode(priv); + if (ret) + goto err_clk; + + ret = reset_control_deassert(priv->phy_rst); + if (ret) + goto err_clk; + + if (priv->mode == PHY_TYPE_USB3) { + ret = readx_poll_timeout(rockchip_combphy_is_ready, + priv, val, + val == cfg->pipe_phy_status.enable, + 1000); + if (ret) + dev_warn(priv->dev, "wait phy status ready timeout\n"); + } + + return 0; + +err_clk: + clk_bulk_disable(priv->num_clks, priv->clks); + + return ret; +} + +static int rockchip_combphy_exit(struct phy *phy) +{ + struct rockchip_combphy_priv *priv = phy_get_drvdata(phy); + + clk_bulk_disable(priv->num_clks, priv->clks); + reset_control_assert(priv->phy_rst); + + return 0; +} + +static const struct phy_ops rochchip_combphy_ops = { + .init = rockchip_combphy_init, + .exit = rockchip_combphy_exit, +}; + +static struct phy *rockchip_combphy_xlate(struct device_d *dev, + struct of_phandle_args *args) +{ + struct rockchip_combphy_priv *priv = dev->priv; + + if (args->args_count != 1) { + dev_err(dev, "invalid number of arguments\n"); + return ERR_PTR(-EINVAL); + } + + if (priv->mode != PHY_NONE && priv->mode != args->args[0]) + dev_warn(dev, "phy type select %d overwriting type %d\n", + args->args[0], priv->mode); + + priv->mode = args->args[0]; + + return priv->phy; +} + +static int rockchip_combphy_parse_dt(struct device_d *dev, + struct rockchip_combphy_priv *priv) +{ + struct device_node *np = dev->device_node; + const struct rockchip_combphy_cfg *phy_cfg = priv->cfg; + int ret, mac_id; + + ret = clk_bulk_get(dev, priv->num_clks, priv->clks); + if (ret == -EPROBE_DEFER) + return -EPROBE_DEFER; + if (ret) + priv->num_clks = 0; + + priv->pipe_grf = syscon_regmap_lookup_by_phandle(np, + "rockchip,pipe-grf"); + if (IS_ERR(priv->pipe_grf)) { + dev_err(dev, "failed to find peri_ctrl pipe-grf regmap\n"); + return PTR_ERR(priv->pipe_grf); + } + + priv->phy_grf = syscon_regmap_lookup_by_phandle(np, + "rockchip,pipe-phy-grf"); + if (IS_ERR(priv->phy_grf)) { + dev_err(dev, "failed to find peri_ctrl pipe-phy-grf regmap\n"); + return PTR_ERR(priv->phy_grf); + } + + if (!of_property_read_u32(np, "rockchip,sgmii-mac-sel", &mac_id) && + (mac_id > 0)) + param_write(priv->pipe_grf, &phy_cfg->grfcfg->pipe_sgmii_mac_sel, + true); + + priv->apb_rst = reset_control_get(dev, "combphy-apb"); + if (IS_ERR(priv->apb_rst)) { + ret = PTR_ERR(priv->apb_rst); + + if (ret != -EPROBE_DEFER) + dev_warn(dev, "failed to get apb reset\n"); + + return ret; + } + + priv->phy_rst = reset_control_get(dev, "combphy"); + if (IS_ERR(priv->phy_rst)) { + ret = PTR_ERR(priv->phy_rst); + + if (ret != -EPROBE_DEFER) + dev_warn(dev, "failed to get phy reset\n"); + + return ret; + } + + return reset_control_assert(priv->phy_rst); +} + +static int rockchip_combphy_probe(struct device_d *dev) +{ + struct phy_provider *phy_provider; + struct rockchip_combphy_priv *priv; + const struct rockchip_combphy_cfg *phy_cfg; + struct resource *res; + int ret; + + phy_cfg = device_get_match_data(dev); + if (!phy_cfg) { + dev_err(dev, "No OF match data provided\n"); + return -EINVAL; + } + + priv = xzalloc(sizeof(*priv)); + if (!priv) + return -ENOMEM; + + res = dev_request_mem_resource(dev, 0); + if (IS_ERR(res)) { + ret = PTR_ERR(res); + return ret; + } + + priv->mmio = IOMEM(res->start); + + priv->num_clks = phy_cfg->num_clks; + + priv->clks = memdup(phy_cfg->clks, + phy_cfg->num_clks * sizeof(struct clk_bulk_data)); + if (!priv->clks) + return -ENOMEM; + + priv->dev = dev; + priv->mode = PHY_NONE; + priv->cfg = phy_cfg; + + ret = rockchip_combphy_parse_dt(dev, priv); + if (ret) + return ret; + + priv->phy = phy_create(dev, NULL, &rochchip_combphy_ops); + if (IS_ERR(priv->phy)) { + dev_err(dev, "failed to create combphy\n"); + return PTR_ERR(priv->phy); + } + + dev->priv = priv; + phy_set_drvdata(priv->phy, priv); + + phy_provider = of_phy_provider_register(dev, rockchip_combphy_xlate); + + return PTR_ERR_OR_ZERO(phy_provider); +} + +static int rk3568_combphy_cfg(struct rockchip_combphy_priv *priv) +{ + struct device_node *np = priv->dev->device_node; + const struct rockchip_combphy_grfcfg *cfg = priv->cfg->grfcfg; + struct clk *refclk = NULL; + unsigned long rate; + int i; + u32 val; + + /* Configure PHY reference clock frequency */ + for (i = 0; i < priv->num_clks; i++) { + if (!strncmp(priv->clks[i].id, "refclk", 6)) { + refclk = priv->clks[i].clk; + break; + } + } + + if (!refclk) { + dev_err(priv->dev, "No refclk found\n"); + return -EINVAL; + } + + switch (priv->mode) { + case PHY_TYPE_PCIE: + /* Set SSC downward spread spectrum */ + val = readl(priv->mmio + (0x1f << 2)); + val &= ~GENMASK(5, 4); + val |= 0x01 << 4; + writel(val, priv->mmio + 0x7c); + + param_write(priv->phy_grf, &cfg->con0_for_pcie, true); + param_write(priv->phy_grf, &cfg->con1_for_pcie, true); + param_write(priv->phy_grf, &cfg->con2_for_pcie, true); + param_write(priv->phy_grf, &cfg->con3_for_pcie, true); + break; + case PHY_TYPE_USB3: + /* Set SSC downward spread spectrum */ + val = readl(priv->mmio + (0x1f << 2)); + val &= ~GENMASK(5, 4); + val |= 0x01 << 4; + writel(val, priv->mmio + 0x7c); + + /* Enable adaptive CTLE for USB3.0 Rx */ + val = readl(priv->mmio + (0x0e << 2)); + val &= ~GENMASK(0, 0); + val |= 0x01; + writel(val, priv->mmio + (0x0e << 2)); + + param_write(priv->phy_grf, &cfg->pipe_sel_usb, true); + param_write(priv->phy_grf, &cfg->pipe_txcomp_sel, false); + param_write(priv->phy_grf, &cfg->pipe_txelec_sel, false); + param_write(priv->phy_grf, &cfg->usb_mode_set, true); + break; + case PHY_TYPE_SATA: + writel(0x41, priv->mmio + 0x38); + writel(0x8F, priv->mmio + 0x18); + param_write(priv->phy_grf, &cfg->con0_for_sata, true); + param_write(priv->phy_grf, &cfg->con1_for_sata, true); + param_write(priv->phy_grf, &cfg->con2_for_sata, true); + param_write(priv->phy_grf, &cfg->con3_for_sata, true); + param_write(priv->pipe_grf, &cfg->pipe_con0_for_sata, true); + break; + case PHY_TYPE_SGMII: + param_write(priv->pipe_grf, &cfg->pipe_xpcs_phy_ready, true); + param_write(priv->phy_grf, &cfg->pipe_phymode_sel, true); + param_write(priv->phy_grf, &cfg->pipe_sel_qsgmii, true); + param_write(priv->phy_grf, &cfg->sgmii_mode_set, true); + break; + case PHY_TYPE_QSGMII: + param_write(priv->pipe_grf, &cfg->pipe_xpcs_phy_ready, true); + param_write(priv->phy_grf, &cfg->pipe_phymode_sel, true); + param_write(priv->phy_grf, &cfg->pipe_rate_sel, true); + param_write(priv->phy_grf, &cfg->pipe_sel_qsgmii, true); + param_write(priv->phy_grf, &cfg->qsgmii_mode_set, true); + break; + default: + dev_err(priv->dev, "incompatible PHY type\n"); + return -EINVAL; + } + + rate = clk_get_rate(refclk); + + switch (rate) { + case 24000000: + if (priv->mode == PHY_TYPE_USB3 || priv->mode == PHY_TYPE_SATA) { + /* Set ssc_cnt[9:0]=0101111101 & 31.5KHz */ + val = readl(priv->mmio + (0x0e << 2)); + val &= ~GENMASK(7, 6); + val |= 0x01 << 6; + writel(val, priv->mmio + (0x0e << 2)); + + val = readl(priv->mmio + (0x0f << 2)); + val &= ~GENMASK(7, 0); + val |= 0x5f; + writel(val, priv->mmio + (0x0f << 2)); + } + break; + case 25000000: + param_write(priv->phy_grf, &cfg->pipe_clk_25m, true); + break; + case 100000000: + param_write(priv->phy_grf, &cfg->pipe_clk_100m, true); + if (priv->mode == PHY_TYPE_PCIE) { + /* PLL KVCO tuning fine */ + val = readl(priv->mmio + (0x20 << 2)); + val &= ~(0x7 << 2); + val |= 0x2 << 2; + writel(val, priv->mmio + (0x20 << 2)); + + /* Enable controlling random jitter, aka RMJ */ + writel(0x4, priv->mmio + (0xb << 2)); + + val = readl(priv->mmio + (0x5 << 2)); + val &= ~(0x3 << 6); + val |= 0x1 << 6; + writel(val, priv->mmio + (0x5 << 2)); + + writel(0x32, priv->mmio + (0x11 << 2)); + writel(0xf0, priv->mmio + (0xa << 2)); + } else if (priv->mode == PHY_TYPE_SATA) { + /* downward spread spectrum +500ppm */ + val = readl(priv->mmio + (0x1f << 2)); + val &= ~GENMASK(7, 4); + val |= 0x50; + writel(val, priv->mmio + (0x1f << 2)); + } + break; + default: + dev_err(priv->dev, "Unsupported rate: %lu\n", rate); + return -EINVAL; + } + + if (of_property_read_bool(np, "rockchip,ext-refclk")) { + param_write(priv->phy_grf, &cfg->pipe_clk_ext, true); + if (priv->mode == PHY_TYPE_PCIE && rate == 100000000) { + val = readl(priv->mmio + (0xc << 2)); + val |= 0x3 << 4 | 0x1 << 7; + writel(val, priv->mmio + (0xc << 2)); + + val = readl(priv->mmio + (0xd << 2)); + val |= 0x1; + writel(val, priv->mmio + (0xd << 2)); + } + } + + if (of_property_read_bool(np, "rockchip,enable-ssc")) { + val = readl(priv->mmio + (0x7 << 2)); + val |= BIT(4); + writel(val, priv->mmio + (0x7 << 2)); + } + + return 0; +} + +static const struct rockchip_combphy_grfcfg rk3568_combphy_grfcfgs = { + /* pipe-phy-grf */ + .pcie_mode_set = { 0x0000, 5, 0, 0x00, 0x11 }, + .usb_mode_set = { 0x0000, 5, 0, 0x00, 0x04 }, + .sgmii_mode_set = { 0x0000, 5, 0, 0x00, 0x01 }, + .qsgmii_mode_set = { 0x0000, 5, 0, 0x00, 0x21 }, + .pipe_rxterm_set = { 0x0000, 12, 12, 0x00, 0x01 }, + .pipe_txelec_set = { 0x0004, 1, 1, 0x00, 0x01 }, + .pipe_txcomp_set = { 0x0004, 4, 4, 0x00, 0x01 }, + .pipe_clk_25m = { 0x0004, 14, 13, 0x00, 0x01 }, + .pipe_clk_100m = { 0x0004, 14, 13, 0x00, 0x02 }, + .pipe_phymode_sel = { 0x0008, 1, 1, 0x00, 0x01 }, + .pipe_rate_sel = { 0x0008, 2, 2, 0x00, 0x01 }, + .pipe_rxterm_sel = { 0x0008, 8, 8, 0x00, 0x01 }, + .pipe_txelec_sel = { 0x0008, 12, 12, 0x00, 0x01 }, + .pipe_txcomp_sel = { 0x0008, 15, 15, 0x00, 0x01 }, + .pipe_clk_ext = { 0x000c, 9, 8, 0x02, 0x01 }, + .pipe_sel_usb = { 0x000c, 14, 13, 0x00, 0x01 }, + .pipe_sel_qsgmii = { 0x000c, 15, 13, 0x00, 0x07 }, + .pipe_phy_status = { 0x0034, 6, 6, 0x01, 0x00 }, + .con0_for_pcie = { 0x0000, 15, 0, 0x00, 0x1000 }, + .con1_for_pcie = { 0x0004, 15, 0, 0x00, 0x0000 }, + .con2_for_pcie = { 0x0008, 15, 0, 0x00, 0x0101 }, + .con3_for_pcie = { 0x000c, 15, 0, 0x00, 0x0200 }, + .con0_for_sata = { 0x0000, 15, 0, 0x00, 0x0119 }, + .con1_for_sata = { 0x0004, 15, 0, 0x00, 0x0040 }, + .con2_for_sata = { 0x0008, 15, 0, 0x00, 0x80c3 }, + .con3_for_sata = { 0x000c, 15, 0, 0x00, 0x4407 }, + /* pipe-grf */ + .pipe_con0_for_sata = { 0x0000, 15, 0, 0x00, 0x2220 }, + .pipe_sgmii_mac_sel = { 0x0040, 1, 1, 0x00, 0x01 }, + .pipe_xpcs_phy_ready = { 0x0040, 2, 2, 0x00, 0x01 }, + .u3otg0_port_en = { 0x0104, 15, 0, 0x0181, 0x1100 }, + .u3otg1_port_en = { 0x0144, 15, 0, 0x0181, 0x1100 }, +}; + +static const struct clk_bulk_data rk3568_clks[] = { + { .id = "refclk" }, + { .id = "apbclk" }, + { .id = "pipe_clk" }, +}; + +static const struct rockchip_combphy_cfg rk3568_combphy_cfgs = { + .num_clks = ARRAY_SIZE(rk3568_clks), + .clks = rk3568_clks, + .grfcfg = &rk3568_combphy_grfcfgs, + .combphy_cfg = rk3568_combphy_cfg, +}; + +static const struct of_device_id rockchip_combphy_of_match[] = { + { + .compatible = "rockchip,rk3568-naneng-combphy", + .data = &rk3568_combphy_cfgs, + }, + { }, +}; + +static struct driver_d rockchip_combphy_driver = { + .probe = rockchip_combphy_probe, + .name = "naneng-combphy", + .of_compatible = rockchip_combphy_of_match, +}; +coredevice_platform_driver(rockchip_combphy_driver); -- 2.29.2 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox