| Message ID | 20210210214205.2496336-3-heiko@sntech.de |
|---|---|
| State | Superseded |
| Headers | show |
| Series | phy: rockchip: add Innosilicon-based CSI DPHY | expand |
On 10-02-21, 22:42, Heiko Stuebner wrote: > From: Heiko Stuebner <heiko.stuebner@theobroma-systems.com> > > The CSI dphy found for example on the rk3326/px30 and rk3368 is based > on an IP design from Innosilicon. Add a driver for it. > > Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com> > --- > drivers/phy/rockchip/Kconfig | 9 + > drivers/phy/rockchip/Makefile | 1 + > .../phy/rockchip/phy-rockchip-inno-csidphy.c | 480 ++++++++++++++++++ > 3 files changed, 490 insertions(+) > create mode 100644 drivers/phy/rockchip/phy-rockchip-inno-csidphy.c > > diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig > index 159285f42e5c..e812adad7242 100644 > --- a/drivers/phy/rockchip/Kconfig > +++ b/drivers/phy/rockchip/Kconfig > @@ -48,6 +48,15 @@ config PHY_ROCKCHIP_INNO_USB2 > help > Support for Rockchip USB2.0 PHY with Innosilicon IP block. > > +config PHY_ROCKCHIP_INNO_CSIDPHY > + tristate "Rockchip Innosilicon MIPI CSI PHY driver" > + depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF > + select GENERIC_PHY > + select GENERIC_PHY_MIPI_DPHY > + help > + Enable this to support the Rockchip MIPI CSI PHY with > + Innosilicon IP block. > + > config PHY_ROCKCHIP_INNO_DSIDPHY > tristate "Rockchip Innosilicon MIPI/LVDS/TTL PHY driver" > depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF > diff --git a/drivers/phy/rockchip/Makefile b/drivers/phy/rockchip/Makefile > index c3cfc7f0af5c..f0eec212b2aa 100644 > --- a/drivers/phy/rockchip/Makefile > +++ b/drivers/phy/rockchip/Makefile > @@ -2,6 +2,7 @@ > obj-$(CONFIG_PHY_ROCKCHIP_DP) += phy-rockchip-dp.o > obj-$(CONFIG_PHY_ROCKCHIP_DPHY_RX0) += phy-rockchip-dphy-rx0.o > obj-$(CONFIG_PHY_ROCKCHIP_EMMC) += phy-rockchip-emmc.o > +obj-$(CONFIG_PHY_ROCKCHIP_INNO_CSIDPHY) += phy-rockchip-inno-csidphy.o > obj-$(CONFIG_PHY_ROCKCHIP_INNO_DSIDPHY) += phy-rockchip-inno-dsidphy.o > obj-$(CONFIG_PHY_ROCKCHIP_INNO_HDMI) += phy-rockchip-inno-hdmi.o > obj-$(CONFIG_PHY_ROCKCHIP_INNO_USB2) += phy-rockchip-inno-usb2.o > diff --git a/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c b/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c > new file mode 100644 > index 000000000000..b30bb2885029 > --- /dev/null > +++ b/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c > @@ -0,0 +1,480 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* > + * Rockchip MIPI RX Innosilicon DPHY driver > + * > + * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd. We are in 2021 now :) > + */ > + > +#include <linux/clk.h> > +#include <linux/delay.h> > +#include <linux/io.h> > +#include <linux/mfd/syscon.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_platform.h> > +#include <linux/phy/phy.h> > +#include <linux/phy/phy-mipi-dphy.h> > +#include <linux/platform_device.h> > +#include <linux/pm_runtime.h> > +#include <linux/regmap.h> > +#include <linux/reset.h> > + > +/* GRF */ > +#define RK1808_GRF_PD_VI_CON_OFFSET 0x0430 > + > +#define RK3326_GRF_PD_VI_CON_OFFSET 0x0430 > + > +#define RK3368_GRF_SOC_CON6_OFFSET 0x0418 > + > +/* PHY */ > +#define CSIDPHY_CTRL_LANE_ENABLE 0x00 > +#define CSIDPHY_CTRL_LANE_ENABLE_CK BIT(6) > +#define CSIDPHY_CTRL_LANE_ENABLE_LANE3 BIT(5) > +#define CSIDPHY_CTRL_LANE_ENABLE_LANE2 BIT(4) > +#define CSIDPHY_CTRL_LANE_ENABLE_LANE1 BIT(3) > +#define CSIDPHY_CTRL_LANE_ENABLE_LANE0 BIT(2) > +#define CSIDPHY_CTRL_LANE_ENABLE_UNDEFINED BIT(0) > + > +#define CSIDPHY_CTRL_LANE_ENABLE_SHIFT 2 > + > +/* not present on all variants */ > +#define CSIDPHY_CTRL_PWRCTL 0x04 > +#define CSIDPHY_CTRL_PWRCTL_UNDEFINED GENMASK(7, 5) > +#define CSIDPHY_CTRL_PWRCTL_SYNCRST BIT(2) > +#define CSIDPHY_CTRL_PWRCTL_LDO_PD BIT(1) > +#define CSIDPHY_CTRL_PWRCTL_PLL_PD BIT(0) > + > +#define CSIDPHY_CTRL_DIG_RST 0x80 > +#define CSIDPHY_CTRL_DIG_RST_UNDEFINED 0x1e > +#define CSIDPHY_CTRL_DIG_RST_RESET BIT(0) > + > +/* offset after ths_settle_offset */ > +#define CSIDPHY_CLK_THS_SETTLE 0 > +#define CSIDPHY_LANE_THS_SETTLE(n) ((n + 1) * 0x80) > +#define CSIDPHY_THS_SETTLE_MASK 0x7f GENMASK for this? > + > +/* offset after calib_offset */ > +#define CSIDPHY_CLK_CALIB_EN 0 > +#define CSIDPHY_LANE_CALIB_EN(n) ((n + 1) * 0x80) > +#define CSIDPHY_CALIB_EN BIT(7) > + > +/* Configure the count time of the THS-SETTLE by protocol. */ > +#define RK1808_CSIDPHY_CLK_WR_THS_SETTLE 0x160 > +#define RK3326_CSIDPHY_CLK_WR_THS_SETTLE 0x100 > +#define RK3368_CSIDPHY_CLK_WR_THS_SETTLE 0x100 > + > +/* Calibration reception enable */ > +#define RK1808_CSIDPHY_CLK_CALIB_EN 0x168 > + > +#define HIWORD_UPDATE(val, mask) ((val) | (mask) << 16) > + > +enum dphy_reg_id { > + GRF_DPHY_RX0_TURNDISABLE = 0, > + GRF_DPHY_RX0_FORCERXMODE, > + GRF_DPHY_RX0_FORCETXSTOPMODE, > + GRF_DPHY_RX0_ENABLE, > + GRF_DPHY_RX0_TURNREQUEST, > + GRF_DPHY_TX0_TURNDISABLE, > + GRF_DPHY_TX0_FORCERXMODE, > + GRF_DPHY_TX0_FORCETXSTOPMODE, > + GRF_DPHY_TX0_TURNREQUEST, > + GRF_DPHY_RX1_SRC_SEL, > + /* rk1808 & rk3326 */ > + GRF_DPHY_CSIPHY_FORCERXMODE, > + GRF_DPHY_CSIPHY_CLKLANE_EN, > + GRF_DPHY_CSIPHY_DATALANE_EN, > +}; > + > +struct dphy_reg { > + u32 offset; > + u32 mask; > + u32 shift; > +}; > + > +#define PHY_REG(_offset, _width, _shift) \ > + { .offset = _offset, .mask = BIT(_width) - 1, .shift = _shift, } > + > +static const struct dphy_reg rk1808_grf_dphy_regs[] = { > + [GRF_DPHY_CSIPHY_FORCERXMODE] = PHY_REG(RK1808_GRF_PD_VI_CON_OFFSET, 4, 0), > + [GRF_DPHY_CSIPHY_CLKLANE_EN] = PHY_REG(RK1808_GRF_PD_VI_CON_OFFSET, 1, 8), > + [GRF_DPHY_CSIPHY_DATALANE_EN] = PHY_REG(RK1808_GRF_PD_VI_CON_OFFSET, 4, 4), > +}; > + > +static const struct dphy_reg rk3326_grf_dphy_regs[] = { > + [GRF_DPHY_CSIPHY_FORCERXMODE] = PHY_REG(RK3326_GRF_PD_VI_CON_OFFSET, 4, 0), > + [GRF_DPHY_CSIPHY_CLKLANE_EN] = PHY_REG(RK3326_GRF_PD_VI_CON_OFFSET, 1, 8), > + [GRF_DPHY_CSIPHY_DATALANE_EN] = PHY_REG(RK3326_GRF_PD_VI_CON_OFFSET, 4, 4), > +}; > + > +static const struct dphy_reg rk3368_grf_dphy_regs[] = { > + [GRF_DPHY_CSIPHY_FORCERXMODE] = PHY_REG(RK3368_GRF_SOC_CON6_OFFSET, 4, 8), > +}; > + > +struct hsfreq_range { > + u32 range_h; > + u8 cfg_bit; > +}; > + > +struct rockchip_inno_csidphy; why this forward declaration here, it is not used before defining few lines below? > + > +struct dphy_drv_data { > + int pwrctl_offset; > + int ths_settle_offset; > + int calib_offset; > + const struct hsfreq_range *hsfreq_ranges; > + int num_hsfreq_ranges; > + const struct dphy_reg *grf_regs; > +}; > + > +struct rockchip_inno_csidphy { > + struct device *dev; > + void __iomem *phy_base; > + struct clk *pclk; > + struct regmap *grf; > + struct reset_control *rst; > + const struct dphy_drv_data *drv_data; > + struct phy_configure_opts_mipi_dphy config; > + u8 hsfreq; > +}; > + > +static inline void write_grf_reg(struct rockchip_inno_csidphy *priv, > + int index, u8 value) align with precceding line opening brace please (checkpatch --strict would warn about such alignment) > +{ > + const struct dphy_drv_data *drv_data = priv->drv_data; > + const struct dphy_reg *reg = &drv_data->grf_regs[index]; > + > + /* Update high word */ > + unsigned int val = (value << reg->shift) | > + (reg->mask << (reg->shift + 16)); please use macros in bitfield to avoid shifting.. why calculate val, if reg->offset is not valid, why not do both under the if condition? > + > + if (reg->offset) > + regmap_write(priv->grf, reg->offset, val); > +} > + > +static inline u32 read_grf_reg(struct rockchip_inno_csidphy *priv, int index) > +{ > + const struct dphy_drv_data *drv_data = priv->drv_data; > + const struct dphy_reg *reg = &drv_data->grf_regs[index]; > + unsigned int val = 0; > + > + if (reg->offset) { > + regmap_read(priv->grf, reg->offset, &val); > + val = (val >> reg->shift) & reg->mask; > + } > + return val; so is 0 a valid value to be read? > +} > + > +/* These tables must be sorted by .range_h ascending. */ > +static const struct hsfreq_range rk1808_mipidphy_hsfreq_ranges[] = { > + { 109, 0x02}, { 149, 0x03}, { 199, 0x06}, { 249, 0x06}, > + { 299, 0x06}, { 399, 0x08}, { 499, 0x0b}, { 599, 0x0e}, > + { 699, 0x10}, { 799, 0x12}, { 999, 0x16}, {1199, 0x1e}, > + {1399, 0x23}, {1599, 0x2d}, {1799, 0x32}, {1999, 0x37}, > + {2199, 0x3c}, {2399, 0x41}, {2499, 0x46} > +}; > + > +static const struct hsfreq_range rk3326_mipidphy_hsfreq_ranges[] = { > + { 109, 0x00}, { 149, 0x01}, { 199, 0x02}, { 249, 0x03}, > + { 299, 0x04}, { 399, 0x05}, { 499, 0x06}, { 599, 0x07}, > + { 699, 0x08}, { 799, 0x09}, { 899, 0x0a}, {1099, 0x0b}, > + {1249, 0x0c}, {1349, 0x0d}, {1500, 0x0e} > +}; > + > +static const struct hsfreq_range rk3368_mipidphy_hsfreq_ranges[] = { > + { 109, 0x00}, { 149, 0x01}, { 199, 0x02}, { 249, 0x03}, > + { 299, 0x04}, { 399, 0x05}, { 499, 0x06}, { 599, 0x07}, > + { 699, 0x08}, { 799, 0x09}, { 899, 0x0a}, {1099, 0x0b}, > + {1249, 0x0c}, {1349, 0x0d}, {1500, 0x0e} > +}; > + > +static void rockchip_inno_csidphy_ths_settle(struct rockchip_inno_csidphy *priv, > + int hsfreq, int offset) > +{ > + const struct dphy_drv_data *drv_data = priv->drv_data; > + u32 val; > + > + val = readl(priv->phy_base + drv_data->ths_settle_offset + offset); > + val &= ~CSIDPHY_THS_SETTLE_MASK; > + val |= hsfreq; > + writel(val, priv->phy_base + drv_data->ths_settle_offset + offset); > +} > + > +static int rockchip_inno_csidphy_configure(struct phy *phy, > + union phy_configure_opts *opts) > +{ > + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); > + const struct dphy_drv_data *drv_data = priv->drv_data; > + struct phy_configure_opts_mipi_dphy *config = &opts->mipi_dphy; > + unsigned int hsfreq = 0; > + unsigned int i; > + u64 data_rate_mbps; > + int ret; > + > + /* pass with phy_mipi_dphy_get_default_config (with pixel rate?) */ > + ret = phy_mipi_dphy_config_validate(config); > + if (ret) > + return ret; > + > + data_rate_mbps = div_u64(config->hs_clk_rate, 1000 * 1000); > + > + dev_dbg(priv->dev, "lanes %d - data_rate_mbps %llu\n", > + config->lanes, data_rate_mbps); > + for (i = 0; i < drv_data->num_hsfreq_ranges; i++) { > + if (drv_data->hsfreq_ranges[i].range_h >= data_rate_mbps) { > + hsfreq = drv_data->hsfreq_ranges[i].cfg_bit; > + break; > + } > + } > + if (!hsfreq) > + return -EINVAL; > + > + priv->hsfreq = hsfreq; > + priv->config = *config; > + return 0; > +} > + > +static int rockchip_inno_csidphy_power_on(struct phy *phy) > +{ > + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); > + const struct dphy_drv_data *drv_data = priv->drv_data; > + u64 data_rate_mbps; > + u32 val = 0; superfluous init? > + int ret, i; > + > + data_rate_mbps = div_u64(priv->config.hs_clk_rate, 1000 * 1000); helper for this? > + > + ret = clk_enable(priv->pclk); > + if (ret < 0) > + return ret; > + > + /* phy start */ > + if (drv_data->pwrctl_offset >= 0) > + writel(CSIDPHY_CTRL_PWRCTL_UNDEFINED | > + CSIDPHY_CTRL_PWRCTL_SYNCRST, > + priv->phy_base + drv_data->pwrctl_offset); > + > + /* set data lane num and enable clock lane */ > + val = GENMASK(priv->config.lanes - 1, 0) << CSIDPHY_CTRL_LANE_ENABLE_SHIFT; Consider using helpers in bitfield.h instead of using shifts > + writel(val | CSIDPHY_CTRL_LANE_ENABLE_CK | > + CSIDPHY_CTRL_LANE_ENABLE_UNDEFINED, > + priv->phy_base + CSIDPHY_CTRL_LANE_ENABLE); > + > + /* Reset dphy analog part */ > + if (drv_data->pwrctl_offset >= 0) > + writel(CSIDPHY_CTRL_PWRCTL_UNDEFINED, > + priv->phy_base + drv_data->pwrctl_offset); > + usleep_range(500, 1000); > + > + /* Reset dphy digital part */ > + writel(CSIDPHY_CTRL_DIG_RST_UNDEFINED, > + priv->phy_base + CSIDPHY_CTRL_DIG_RST); > + writel(CSIDPHY_CTRL_DIG_RST_UNDEFINED + CSIDPHY_CTRL_DIG_RST_RESET, > + priv->phy_base + CSIDPHY_CTRL_DIG_RST); > + > + /* not into receive mode/wait stopstate */ > + write_grf_reg(priv, GRF_DPHY_CSIPHY_FORCERXMODE, 0x0); > + > + /* enable calibration */ > + if (data_rate_mbps > 1500 && drv_data->calib_offset >= 0) { > + writel(CSIDPHY_CALIB_EN, > + priv->phy_base + drv_data->calib_offset + > + CSIDPHY_CLK_CALIB_EN); > + for (i = 0; i < priv->config.lanes; i++) > + writel(CSIDPHY_CALIB_EN, > + priv->phy_base + drv_data->calib_offset + > + CSIDPHY_LANE_CALIB_EN(i)); > + } > + > + rockchip_inno_csidphy_ths_settle(priv, priv->hsfreq, > + CSIDPHY_CLK_THS_SETTLE); > + for (i = 0; i < priv->config.lanes; i++) > + rockchip_inno_csidphy_ths_settle(priv, priv->hsfreq, > + CSIDPHY_LANE_THS_SETTLE(i)); > + > + write_grf_reg(priv, GRF_DPHY_CSIPHY_CLKLANE_EN, 0x1); > + write_grf_reg(priv, GRF_DPHY_CSIPHY_DATALANE_EN, > + GENMASK(priv->config.lanes - 1, 0)); > + > + return 0; > +} > + > +static int rockchip_inno_csidphy_power_off(struct phy *phy) > +{ > + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); > + const struct dphy_drv_data *drv_data = priv->drv_data; > + > + /* disable all lanes */ > + writel(CSIDPHY_CTRL_LANE_ENABLE_UNDEFINED, > + priv->phy_base + CSIDPHY_CTRL_LANE_ENABLE); > + > + /* disable pll and ldo */ > + if (drv_data->pwrctl_offset >= 0) > + writel(CSIDPHY_CTRL_PWRCTL_UNDEFINED | > + CSIDPHY_CTRL_PWRCTL_LDO_PD | > + CSIDPHY_CTRL_PWRCTL_PLL_PD, > + priv->phy_base + drv_data->pwrctl_offset); > + usleep_range(500, 1000); > + > + clk_disable(priv->pclk); > + > + return 0; > +} > + > +static int rockchip_inno_csidphy_init(struct phy *phy) > +{ > + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); > + > + return clk_prepare(priv->pclk); > +} > + > +static int rockchip_inno_csidphy_exit(struct phy *phy) > +{ > + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); > + > + clk_unprepare(priv->pclk); > + > + return 0; > +} > + > +static const struct phy_ops rockchip_inno_csidphy_ops = { > + .power_on = rockchip_inno_csidphy_power_on, > + .power_off = rockchip_inno_csidphy_power_off, > + .init = rockchip_inno_csidphy_init, > + .exit = rockchip_inno_csidphy_exit, > + .configure = rockchip_inno_csidphy_configure, > + .owner = THIS_MODULE, > +}; > + > +static const struct dphy_drv_data rk1808_mipidphy_drv_data = { > + .pwrctl_offset = -1, > + .ths_settle_offset = RK1808_CSIDPHY_CLK_WR_THS_SETTLE, > + .calib_offset = RK1808_CSIDPHY_CLK_CALIB_EN, > + .hsfreq_ranges = rk1808_mipidphy_hsfreq_ranges, > + .num_hsfreq_ranges = ARRAY_SIZE(rk1808_mipidphy_hsfreq_ranges), > + .grf_regs = rk1808_grf_dphy_regs, > +}; > + > +static const struct dphy_drv_data rk3326_mipidphy_drv_data = { > + .pwrctl_offset = CSIDPHY_CTRL_PWRCTL, > + .ths_settle_offset = RK3326_CSIDPHY_CLK_WR_THS_SETTLE, > + .calib_offset = -1, > + .hsfreq_ranges = rk3326_mipidphy_hsfreq_ranges, > + .num_hsfreq_ranges = ARRAY_SIZE(rk3326_mipidphy_hsfreq_ranges), > + .grf_regs = rk3326_grf_dphy_regs, > +}; > + > +static const struct dphy_drv_data rk3368_mipidphy_drv_data = { > + .pwrctl_offset = CSIDPHY_CTRL_PWRCTL, > + .ths_settle_offset = RK3368_CSIDPHY_CLK_WR_THS_SETTLE, > + .calib_offset = -1, > + .hsfreq_ranges = rk3368_mipidphy_hsfreq_ranges, > + .num_hsfreq_ranges = ARRAY_SIZE(rk3368_mipidphy_hsfreq_ranges), > + .grf_regs = rk3368_grf_dphy_regs, > +}; > + > +static const struct of_device_id rockchip_inno_csidphy_match_id[] = { > + { > + .compatible = "rockchip,px30-csi-dphy", > + .data = &rk3326_mipidphy_drv_data, > + }, > + { > + .compatible = "rockchip,rk1808-csi-dphy", > + .data = &rk1808_mipidphy_drv_data, > + }, > + { > + .compatible = "rockchip,rk3326-csi-dphy", > + .data = &rk3326_mipidphy_drv_data, > + }, > + { > + .compatible = "rockchip,rk3368-csi-dphy", > + .data = &rk3368_mipidphy_drv_data, > + }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, rockchip_inno_csidphy_match_id); > + > + > +static int rockchip_inno_csidphy_probe(struct platform_device *pdev) > +{ > + struct rockchip_inno_csidphy *priv; > + struct device *dev = &pdev->dev; > + struct phy_provider *phy_provider; > + struct phy *phy; > + > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return -ENOMEM; > + > + priv->dev = dev; > + platform_set_drvdata(pdev, priv); > + > + priv->drv_data = of_device_get_match_data(dev); > + if (!priv->drv_data) { > + dev_err(dev, "Can't find device data\n"); > + return -ENODEV; > + } > + > + priv->grf = syscon_regmap_lookup_by_phandle(dev->of_node, > + "rockchip,grf"); > + if (IS_ERR(priv->grf)) { > + dev_err(dev, "Can't find GRF syscon\n"); > + return PTR_ERR(priv->grf); > + } > + > + priv->phy_base = devm_platform_ioremap_resource(pdev, 0); > + if (IS_ERR(priv->phy_base)) > + return PTR_ERR(priv->phy_base); > + > + priv->pclk = devm_clk_get(dev, "pclk"); > + if (IS_ERR(priv->pclk)) { > + dev_err(dev, "failed to get pclk\n"); > + return PTR_ERR(priv->pclk); > + } > + > + priv->rst = devm_reset_control_get(dev, "apb"); > + if (IS_ERR(priv->rst)) { > + dev_err(dev, "failed to get system reset control\n"); > + return PTR_ERR(priv->rst); > + } > + > + phy = devm_phy_create(dev, NULL, &rockchip_inno_csidphy_ops); > + if (IS_ERR(phy)) { > + dev_err(dev, "failed to create phy\n"); > + return PTR_ERR(phy); > + } > + > + phy_set_drvdata(phy, priv); > + > + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); > + if (IS_ERR(phy_provider)) { > + dev_err(dev, "failed to register phy provider\n"); > + return PTR_ERR(phy_provider); > + } > + > + pm_runtime_enable(dev); > + > + return 0; > +} > + > +static int rockchip_inno_csidphy_remove(struct platform_device *pdev) > +{ > + struct rockchip_inno_csidphy *priv = platform_get_drvdata(pdev); > + > + pm_runtime_disable(priv->dev); > + > + return 0; > +} > + > +static struct platform_driver rockchip_inno_csidphy_driver = { > + .driver = { > + .name = "rockchip-inno-csidphy", > + .of_match_table = rockchip_inno_csidphy_match_id, double indent here? > + }, > + .probe = rockchip_inno_csidphy_probe, > + .remove = rockchip_inno_csidphy_remove, > +}; > + > +module_platform_driver(rockchip_inno_csidphy_driver); > +MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>"); > +MODULE_DESCRIPTION("Rockchip MIPI Innosilicon CSI-DPHY driver"); > +MODULE_LICENSE("Dual BSD/GPL"); That is not what the SPDX tag for file says? -- ~Vinod
diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig index 159285f42e5c..e812adad7242 100644 --- a/drivers/phy/rockchip/Kconfig +++ b/drivers/phy/rockchip/Kconfig @@ -48,6 +48,15 @@ config PHY_ROCKCHIP_INNO_USB2 help Support for Rockchip USB2.0 PHY with Innosilicon IP block. +config PHY_ROCKCHIP_INNO_CSIDPHY + tristate "Rockchip Innosilicon MIPI CSI PHY driver" + depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF + select GENERIC_PHY + select GENERIC_PHY_MIPI_DPHY + help + Enable this to support the Rockchip MIPI CSI PHY with + Innosilicon IP block. + config PHY_ROCKCHIP_INNO_DSIDPHY tristate "Rockchip Innosilicon MIPI/LVDS/TTL PHY driver" depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF diff --git a/drivers/phy/rockchip/Makefile b/drivers/phy/rockchip/Makefile index c3cfc7f0af5c..f0eec212b2aa 100644 --- a/drivers/phy/rockchip/Makefile +++ b/drivers/phy/rockchip/Makefile @@ -2,6 +2,7 @@ obj-$(CONFIG_PHY_ROCKCHIP_DP) += phy-rockchip-dp.o obj-$(CONFIG_PHY_ROCKCHIP_DPHY_RX0) += phy-rockchip-dphy-rx0.o obj-$(CONFIG_PHY_ROCKCHIP_EMMC) += phy-rockchip-emmc.o +obj-$(CONFIG_PHY_ROCKCHIP_INNO_CSIDPHY) += phy-rockchip-inno-csidphy.o obj-$(CONFIG_PHY_ROCKCHIP_INNO_DSIDPHY) += phy-rockchip-inno-dsidphy.o obj-$(CONFIG_PHY_ROCKCHIP_INNO_HDMI) += phy-rockchip-inno-hdmi.o obj-$(CONFIG_PHY_ROCKCHIP_INNO_USB2) += phy-rockchip-inno-usb2.o diff --git a/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c b/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c new file mode 100644 index 000000000000..b30bb2885029 --- /dev/null +++ b/drivers/phy/rockchip/phy-rockchip-inno-csidphy.c @@ -0,0 +1,480 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Rockchip MIPI RX Innosilicon DPHY driver + * + * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd. + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/phy/phy.h> +#include <linux/phy/phy-mipi-dphy.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/reset.h> + +/* GRF */ +#define RK1808_GRF_PD_VI_CON_OFFSET 0x0430 + +#define RK3326_GRF_PD_VI_CON_OFFSET 0x0430 + +#define RK3368_GRF_SOC_CON6_OFFSET 0x0418 + +/* PHY */ +#define CSIDPHY_CTRL_LANE_ENABLE 0x00 +#define CSIDPHY_CTRL_LANE_ENABLE_CK BIT(6) +#define CSIDPHY_CTRL_LANE_ENABLE_LANE3 BIT(5) +#define CSIDPHY_CTRL_LANE_ENABLE_LANE2 BIT(4) +#define CSIDPHY_CTRL_LANE_ENABLE_LANE1 BIT(3) +#define CSIDPHY_CTRL_LANE_ENABLE_LANE0 BIT(2) +#define CSIDPHY_CTRL_LANE_ENABLE_UNDEFINED BIT(0) + +#define CSIDPHY_CTRL_LANE_ENABLE_SHIFT 2 + +/* not present on all variants */ +#define CSIDPHY_CTRL_PWRCTL 0x04 +#define CSIDPHY_CTRL_PWRCTL_UNDEFINED GENMASK(7, 5) +#define CSIDPHY_CTRL_PWRCTL_SYNCRST BIT(2) +#define CSIDPHY_CTRL_PWRCTL_LDO_PD BIT(1) +#define CSIDPHY_CTRL_PWRCTL_PLL_PD BIT(0) + +#define CSIDPHY_CTRL_DIG_RST 0x80 +#define CSIDPHY_CTRL_DIG_RST_UNDEFINED 0x1e +#define CSIDPHY_CTRL_DIG_RST_RESET BIT(0) + +/* offset after ths_settle_offset */ +#define CSIDPHY_CLK_THS_SETTLE 0 +#define CSIDPHY_LANE_THS_SETTLE(n) ((n + 1) * 0x80) +#define CSIDPHY_THS_SETTLE_MASK 0x7f + +/* offset after calib_offset */ +#define CSIDPHY_CLK_CALIB_EN 0 +#define CSIDPHY_LANE_CALIB_EN(n) ((n + 1) * 0x80) +#define CSIDPHY_CALIB_EN BIT(7) + +/* Configure the count time of the THS-SETTLE by protocol. */ +#define RK1808_CSIDPHY_CLK_WR_THS_SETTLE 0x160 +#define RK3326_CSIDPHY_CLK_WR_THS_SETTLE 0x100 +#define RK3368_CSIDPHY_CLK_WR_THS_SETTLE 0x100 + +/* Calibration reception enable */ +#define RK1808_CSIDPHY_CLK_CALIB_EN 0x168 + +#define HIWORD_UPDATE(val, mask) ((val) | (mask) << 16) + +enum dphy_reg_id { + GRF_DPHY_RX0_TURNDISABLE = 0, + GRF_DPHY_RX0_FORCERXMODE, + GRF_DPHY_RX0_FORCETXSTOPMODE, + GRF_DPHY_RX0_ENABLE, + GRF_DPHY_RX0_TURNREQUEST, + GRF_DPHY_TX0_TURNDISABLE, + GRF_DPHY_TX0_FORCERXMODE, + GRF_DPHY_TX0_FORCETXSTOPMODE, + GRF_DPHY_TX0_TURNREQUEST, + GRF_DPHY_RX1_SRC_SEL, + /* rk1808 & rk3326 */ + GRF_DPHY_CSIPHY_FORCERXMODE, + GRF_DPHY_CSIPHY_CLKLANE_EN, + GRF_DPHY_CSIPHY_DATALANE_EN, +}; + +struct dphy_reg { + u32 offset; + u32 mask; + u32 shift; +}; + +#define PHY_REG(_offset, _width, _shift) \ + { .offset = _offset, .mask = BIT(_width) - 1, .shift = _shift, } + +static const struct dphy_reg rk1808_grf_dphy_regs[] = { + [GRF_DPHY_CSIPHY_FORCERXMODE] = PHY_REG(RK1808_GRF_PD_VI_CON_OFFSET, 4, 0), + [GRF_DPHY_CSIPHY_CLKLANE_EN] = PHY_REG(RK1808_GRF_PD_VI_CON_OFFSET, 1, 8), + [GRF_DPHY_CSIPHY_DATALANE_EN] = PHY_REG(RK1808_GRF_PD_VI_CON_OFFSET, 4, 4), +}; + +static const struct dphy_reg rk3326_grf_dphy_regs[] = { + [GRF_DPHY_CSIPHY_FORCERXMODE] = PHY_REG(RK3326_GRF_PD_VI_CON_OFFSET, 4, 0), + [GRF_DPHY_CSIPHY_CLKLANE_EN] = PHY_REG(RK3326_GRF_PD_VI_CON_OFFSET, 1, 8), + [GRF_DPHY_CSIPHY_DATALANE_EN] = PHY_REG(RK3326_GRF_PD_VI_CON_OFFSET, 4, 4), +}; + +static const struct dphy_reg rk3368_grf_dphy_regs[] = { + [GRF_DPHY_CSIPHY_FORCERXMODE] = PHY_REG(RK3368_GRF_SOC_CON6_OFFSET, 4, 8), +}; + +struct hsfreq_range { + u32 range_h; + u8 cfg_bit; +}; + +struct rockchip_inno_csidphy; + +struct dphy_drv_data { + int pwrctl_offset; + int ths_settle_offset; + int calib_offset; + const struct hsfreq_range *hsfreq_ranges; + int num_hsfreq_ranges; + const struct dphy_reg *grf_regs; +}; + +struct rockchip_inno_csidphy { + struct device *dev; + void __iomem *phy_base; + struct clk *pclk; + struct regmap *grf; + struct reset_control *rst; + const struct dphy_drv_data *drv_data; + struct phy_configure_opts_mipi_dphy config; + u8 hsfreq; +}; + +static inline void write_grf_reg(struct rockchip_inno_csidphy *priv, + int index, u8 value) +{ + const struct dphy_drv_data *drv_data = priv->drv_data; + const struct dphy_reg *reg = &drv_data->grf_regs[index]; + + /* Update high word */ + unsigned int val = (value << reg->shift) | + (reg->mask << (reg->shift + 16)); + + if (reg->offset) + regmap_write(priv->grf, reg->offset, val); +} + +static inline u32 read_grf_reg(struct rockchip_inno_csidphy *priv, int index) +{ + const struct dphy_drv_data *drv_data = priv->drv_data; + const struct dphy_reg *reg = &drv_data->grf_regs[index]; + unsigned int val = 0; + + if (reg->offset) { + regmap_read(priv->grf, reg->offset, &val); + val = (val >> reg->shift) & reg->mask; + } + return val; +} + +/* These tables must be sorted by .range_h ascending. */ +static const struct hsfreq_range rk1808_mipidphy_hsfreq_ranges[] = { + { 109, 0x02}, { 149, 0x03}, { 199, 0x06}, { 249, 0x06}, + { 299, 0x06}, { 399, 0x08}, { 499, 0x0b}, { 599, 0x0e}, + { 699, 0x10}, { 799, 0x12}, { 999, 0x16}, {1199, 0x1e}, + {1399, 0x23}, {1599, 0x2d}, {1799, 0x32}, {1999, 0x37}, + {2199, 0x3c}, {2399, 0x41}, {2499, 0x46} +}; + +static const struct hsfreq_range rk3326_mipidphy_hsfreq_ranges[] = { + { 109, 0x00}, { 149, 0x01}, { 199, 0x02}, { 249, 0x03}, + { 299, 0x04}, { 399, 0x05}, { 499, 0x06}, { 599, 0x07}, + { 699, 0x08}, { 799, 0x09}, { 899, 0x0a}, {1099, 0x0b}, + {1249, 0x0c}, {1349, 0x0d}, {1500, 0x0e} +}; + +static const struct hsfreq_range rk3368_mipidphy_hsfreq_ranges[] = { + { 109, 0x00}, { 149, 0x01}, { 199, 0x02}, { 249, 0x03}, + { 299, 0x04}, { 399, 0x05}, { 499, 0x06}, { 599, 0x07}, + { 699, 0x08}, { 799, 0x09}, { 899, 0x0a}, {1099, 0x0b}, + {1249, 0x0c}, {1349, 0x0d}, {1500, 0x0e} +}; + +static void rockchip_inno_csidphy_ths_settle(struct rockchip_inno_csidphy *priv, + int hsfreq, int offset) +{ + const struct dphy_drv_data *drv_data = priv->drv_data; + u32 val; + + val = readl(priv->phy_base + drv_data->ths_settle_offset + offset); + val &= ~CSIDPHY_THS_SETTLE_MASK; + val |= hsfreq; + writel(val, priv->phy_base + drv_data->ths_settle_offset + offset); +} + +static int rockchip_inno_csidphy_configure(struct phy *phy, + union phy_configure_opts *opts) +{ + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); + const struct dphy_drv_data *drv_data = priv->drv_data; + struct phy_configure_opts_mipi_dphy *config = &opts->mipi_dphy; + unsigned int hsfreq = 0; + unsigned int i; + u64 data_rate_mbps; + int ret; + + /* pass with phy_mipi_dphy_get_default_config (with pixel rate?) */ + ret = phy_mipi_dphy_config_validate(config); + if (ret) + return ret; + + data_rate_mbps = div_u64(config->hs_clk_rate, 1000 * 1000); + + dev_dbg(priv->dev, "lanes %d - data_rate_mbps %llu\n", + config->lanes, data_rate_mbps); + for (i = 0; i < drv_data->num_hsfreq_ranges; i++) { + if (drv_data->hsfreq_ranges[i].range_h >= data_rate_mbps) { + hsfreq = drv_data->hsfreq_ranges[i].cfg_bit; + break; + } + } + if (!hsfreq) + return -EINVAL; + + priv->hsfreq = hsfreq; + priv->config = *config; + return 0; +} + +static int rockchip_inno_csidphy_power_on(struct phy *phy) +{ + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); + const struct dphy_drv_data *drv_data = priv->drv_data; + u64 data_rate_mbps; + u32 val = 0; + int ret, i; + + data_rate_mbps = div_u64(priv->config.hs_clk_rate, 1000 * 1000); + + ret = clk_enable(priv->pclk); + if (ret < 0) + return ret; + + /* phy start */ + if (drv_data->pwrctl_offset >= 0) + writel(CSIDPHY_CTRL_PWRCTL_UNDEFINED | + CSIDPHY_CTRL_PWRCTL_SYNCRST, + priv->phy_base + drv_data->pwrctl_offset); + + /* set data lane num and enable clock lane */ + val = GENMASK(priv->config.lanes - 1, 0) << CSIDPHY_CTRL_LANE_ENABLE_SHIFT; + writel(val | CSIDPHY_CTRL_LANE_ENABLE_CK | + CSIDPHY_CTRL_LANE_ENABLE_UNDEFINED, + priv->phy_base + CSIDPHY_CTRL_LANE_ENABLE); + + /* Reset dphy analog part */ + if (drv_data->pwrctl_offset >= 0) + writel(CSIDPHY_CTRL_PWRCTL_UNDEFINED, + priv->phy_base + drv_data->pwrctl_offset); + usleep_range(500, 1000); + + /* Reset dphy digital part */ + writel(CSIDPHY_CTRL_DIG_RST_UNDEFINED, + priv->phy_base + CSIDPHY_CTRL_DIG_RST); + writel(CSIDPHY_CTRL_DIG_RST_UNDEFINED + CSIDPHY_CTRL_DIG_RST_RESET, + priv->phy_base + CSIDPHY_CTRL_DIG_RST); + + /* not into receive mode/wait stopstate */ + write_grf_reg(priv, GRF_DPHY_CSIPHY_FORCERXMODE, 0x0); + + /* enable calibration */ + if (data_rate_mbps > 1500 && drv_data->calib_offset >= 0) { + writel(CSIDPHY_CALIB_EN, + priv->phy_base + drv_data->calib_offset + + CSIDPHY_CLK_CALIB_EN); + for (i = 0; i < priv->config.lanes; i++) + writel(CSIDPHY_CALIB_EN, + priv->phy_base + drv_data->calib_offset + + CSIDPHY_LANE_CALIB_EN(i)); + } + + rockchip_inno_csidphy_ths_settle(priv, priv->hsfreq, + CSIDPHY_CLK_THS_SETTLE); + for (i = 0; i < priv->config.lanes; i++) + rockchip_inno_csidphy_ths_settle(priv, priv->hsfreq, + CSIDPHY_LANE_THS_SETTLE(i)); + + write_grf_reg(priv, GRF_DPHY_CSIPHY_CLKLANE_EN, 0x1); + write_grf_reg(priv, GRF_DPHY_CSIPHY_DATALANE_EN, + GENMASK(priv->config.lanes - 1, 0)); + + return 0; +} + +static int rockchip_inno_csidphy_power_off(struct phy *phy) +{ + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); + const struct dphy_drv_data *drv_data = priv->drv_data; + + /* disable all lanes */ + writel(CSIDPHY_CTRL_LANE_ENABLE_UNDEFINED, + priv->phy_base + CSIDPHY_CTRL_LANE_ENABLE); + + /* disable pll and ldo */ + if (drv_data->pwrctl_offset >= 0) + writel(CSIDPHY_CTRL_PWRCTL_UNDEFINED | + CSIDPHY_CTRL_PWRCTL_LDO_PD | + CSIDPHY_CTRL_PWRCTL_PLL_PD, + priv->phy_base + drv_data->pwrctl_offset); + usleep_range(500, 1000); + + clk_disable(priv->pclk); + + return 0; +} + +static int rockchip_inno_csidphy_init(struct phy *phy) +{ + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); + + return clk_prepare(priv->pclk); +} + +static int rockchip_inno_csidphy_exit(struct phy *phy) +{ + struct rockchip_inno_csidphy *priv = phy_get_drvdata(phy); + + clk_unprepare(priv->pclk); + + return 0; +} + +static const struct phy_ops rockchip_inno_csidphy_ops = { + .power_on = rockchip_inno_csidphy_power_on, + .power_off = rockchip_inno_csidphy_power_off, + .init = rockchip_inno_csidphy_init, + .exit = rockchip_inno_csidphy_exit, + .configure = rockchip_inno_csidphy_configure, + .owner = THIS_MODULE, +}; + +static const struct dphy_drv_data rk1808_mipidphy_drv_data = { + .pwrctl_offset = -1, + .ths_settle_offset = RK1808_CSIDPHY_CLK_WR_THS_SETTLE, + .calib_offset = RK1808_CSIDPHY_CLK_CALIB_EN, + .hsfreq_ranges = rk1808_mipidphy_hsfreq_ranges, + .num_hsfreq_ranges = ARRAY_SIZE(rk1808_mipidphy_hsfreq_ranges), + .grf_regs = rk1808_grf_dphy_regs, +}; + +static const struct dphy_drv_data rk3326_mipidphy_drv_data = { + .pwrctl_offset = CSIDPHY_CTRL_PWRCTL, + .ths_settle_offset = RK3326_CSIDPHY_CLK_WR_THS_SETTLE, + .calib_offset = -1, + .hsfreq_ranges = rk3326_mipidphy_hsfreq_ranges, + .num_hsfreq_ranges = ARRAY_SIZE(rk3326_mipidphy_hsfreq_ranges), + .grf_regs = rk3326_grf_dphy_regs, +}; + +static const struct dphy_drv_data rk3368_mipidphy_drv_data = { + .pwrctl_offset = CSIDPHY_CTRL_PWRCTL, + .ths_settle_offset = RK3368_CSIDPHY_CLK_WR_THS_SETTLE, + .calib_offset = -1, + .hsfreq_ranges = rk3368_mipidphy_hsfreq_ranges, + .num_hsfreq_ranges = ARRAY_SIZE(rk3368_mipidphy_hsfreq_ranges), + .grf_regs = rk3368_grf_dphy_regs, +}; + +static const struct of_device_id rockchip_inno_csidphy_match_id[] = { + { + .compatible = "rockchip,px30-csi-dphy", + .data = &rk3326_mipidphy_drv_data, + }, + { + .compatible = "rockchip,rk1808-csi-dphy", + .data = &rk1808_mipidphy_drv_data, + }, + { + .compatible = "rockchip,rk3326-csi-dphy", + .data = &rk3326_mipidphy_drv_data, + }, + { + .compatible = "rockchip,rk3368-csi-dphy", + .data = &rk3368_mipidphy_drv_data, + }, + {} +}; +MODULE_DEVICE_TABLE(of, rockchip_inno_csidphy_match_id); + + +static int rockchip_inno_csidphy_probe(struct platform_device *pdev) +{ + struct rockchip_inno_csidphy *priv; + struct device *dev = &pdev->dev; + struct phy_provider *phy_provider; + struct phy *phy; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + platform_set_drvdata(pdev, priv); + + priv->drv_data = of_device_get_match_data(dev); + if (!priv->drv_data) { + dev_err(dev, "Can't find device data\n"); + return -ENODEV; + } + + priv->grf = syscon_regmap_lookup_by_phandle(dev->of_node, + "rockchip,grf"); + if (IS_ERR(priv->grf)) { + dev_err(dev, "Can't find GRF syscon\n"); + return PTR_ERR(priv->grf); + } + + priv->phy_base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(priv->phy_base)) + return PTR_ERR(priv->phy_base); + + priv->pclk = devm_clk_get(dev, "pclk"); + if (IS_ERR(priv->pclk)) { + dev_err(dev, "failed to get pclk\n"); + return PTR_ERR(priv->pclk); + } + + priv->rst = devm_reset_control_get(dev, "apb"); + if (IS_ERR(priv->rst)) { + dev_err(dev, "failed to get system reset control\n"); + return PTR_ERR(priv->rst); + } + + phy = devm_phy_create(dev, NULL, &rockchip_inno_csidphy_ops); + if (IS_ERR(phy)) { + dev_err(dev, "failed to create phy\n"); + return PTR_ERR(phy); + } + + phy_set_drvdata(phy, priv); + + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); + if (IS_ERR(phy_provider)) { + dev_err(dev, "failed to register phy provider\n"); + return PTR_ERR(phy_provider); + } + + pm_runtime_enable(dev); + + return 0; +} + +static int rockchip_inno_csidphy_remove(struct platform_device *pdev) +{ + struct rockchip_inno_csidphy *priv = platform_get_drvdata(pdev); + + pm_runtime_disable(priv->dev); + + return 0; +} + +static struct platform_driver rockchip_inno_csidphy_driver = { + .driver = { + .name = "rockchip-inno-csidphy", + .of_match_table = rockchip_inno_csidphy_match_id, + }, + .probe = rockchip_inno_csidphy_probe, + .remove = rockchip_inno_csidphy_remove, +}; + +module_platform_driver(rockchip_inno_csidphy_driver); +MODULE_AUTHOR("Heiko Stuebner <heiko.stuebner@theobroma-systems.com>"); +MODULE_DESCRIPTION("Rockchip MIPI Innosilicon CSI-DPHY driver"); +MODULE_LICENSE("Dual BSD/GPL");