| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Maxime Ripard | 1699 | 78.37% | 1 | 25.00% |
| Rahul T R | 467 | 21.54% | 2 | 50.00% |
| Chunfeng Yun | 2 | 0.09% | 1 | 25.00% |
| Total | 2168 | 4 |
// SPDX-License-Identifier: GPL-2.0+ /* * Copyright: 2017-2018 Cadence Design Systems, Inc. */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/clk.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/of_address.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/reset.h> #include <linux/phy/phy.h> #include <linux/phy/phy-mipi-dphy.h> #define REG_WAKEUP_TIME_NS 800 #define DPHY_PLL_RATE_HZ 108000000 #define POLL_TIMEOUT_US 1000 /* DPHY registers */ #define DPHY_PMA_CMN(reg) (reg) #define DPHY_PMA_LCLK(reg) (0x100 + (reg)) #define DPHY_PMA_LDATA(lane, reg) (0x200 + ((lane) * 0x100) + (reg)) #define DPHY_PMA_RCLK(reg) (0x600 + (reg)) #define DPHY_PMA_RDATA(lane, reg) (0x700 + ((lane) * 0x100) + (reg)) #define DPHY_PCS(reg) (0xb00 + (reg)) #define DPHY_CMN_SSM DPHY_PMA_CMN(0x20) #define DPHY_CMN_SSM_EN BIT(0) #define DPHY_CMN_TX_MODE_EN BIT(9) #define DPHY_CMN_PWM DPHY_PMA_CMN(0x40) #define DPHY_CMN_PWM_DIV(x) ((x) << 20) #define DPHY_CMN_PWM_LOW(x) ((x) << 10) #define DPHY_CMN_PWM_HIGH(x) (x) #define DPHY_CMN_FBDIV DPHY_PMA_CMN(0x4c) #define DPHY_CMN_FBDIV_VAL(low, high) (((high) << 11) | ((low) << 22)) #define DPHY_CMN_FBDIV_FROM_REG (BIT(10) | BIT(21)) #define DPHY_CMN_OPIPDIV DPHY_PMA_CMN(0x50) #define DPHY_CMN_IPDIV_FROM_REG BIT(0) #define DPHY_CMN_IPDIV(x) ((x) << 1) #define DPHY_CMN_OPDIV_FROM_REG BIT(6) #define DPHY_CMN_OPDIV(x) ((x) << 7) #define DPHY_BAND_CFG DPHY_PCS(0x0) #define DPHY_BAND_CFG_LEFT_BAND GENMASK(4, 0) #define DPHY_BAND_CFG_RIGHT_BAND GENMASK(9, 5) #define DPHY_PSM_CFG DPHY_PCS(0x4) #define DPHY_PSM_CFG_FROM_REG BIT(0) #define DPHY_PSM_CLK_DIV(x) ((x) << 1) #define DSI_HBP_FRAME_OVERHEAD 12 #define DSI_HSA_FRAME_OVERHEAD 14 #define DSI_HFP_FRAME_OVERHEAD 6 #define DSI_HSS_VSS_VSE_FRAME_OVERHEAD 4 #define DSI_BLANKING_FRAME_OVERHEAD 6 #define DSI_NULL_FRAME_OVERHEAD 6 #define DSI_EOT_PKT_SIZE 4 #define DPHY_TX_J721E_WIZ_PLL_CTRL 0xF04 #define DPHY_TX_J721E_WIZ_STATUS 0xF08 #define DPHY_TX_J721E_WIZ_RST_CTRL 0xF0C #define DPHY_TX_J721E_WIZ_PSM_FREQ 0xF10 #define DPHY_TX_J721E_WIZ_IPDIV GENMASK(4, 0) #define DPHY_TX_J721E_WIZ_OPDIV GENMASK(13, 8) #define DPHY_TX_J721E_WIZ_FBDIV GENMASK(25, 16) #define DPHY_TX_J721E_WIZ_LANE_RSTB BIT(31) #define DPHY_TX_WIZ_PLL_LOCK BIT(31) #define DPHY_TX_WIZ_O_CMN_READY BIT(31) struct cdns_dphy_cfg { u8 pll_ipdiv; u8 pll_opdiv; u16 pll_fbdiv; unsigned int nlanes; }; enum cdns_dphy_clk_lane_cfg { DPHY_CLK_CFG_LEFT_DRIVES_ALL = 0, DPHY_CLK_CFG_LEFT_DRIVES_RIGHT = 1, DPHY_CLK_CFG_LEFT_DRIVES_LEFT = 2, DPHY_CLK_CFG_RIGHT_DRIVES_ALL = 3, }; struct cdns_dphy; struct cdns_dphy_ops { int (*probe)(struct cdns_dphy *dphy); void (*remove)(struct cdns_dphy *dphy); void (*set_psm_div)(struct cdns_dphy *dphy, u8 div); void (*set_clk_lane_cfg)(struct cdns_dphy *dphy, enum cdns_dphy_clk_lane_cfg cfg); void (*set_pll_cfg)(struct cdns_dphy *dphy, const struct cdns_dphy_cfg *cfg); unsigned long (*get_wakeup_time_ns)(struct cdns_dphy *dphy); }; struct cdns_dphy { struct cdns_dphy_cfg cfg; void __iomem *regs; struct clk *psm_clk; struct clk *pll_ref_clk; const struct cdns_dphy_ops *ops; struct phy *phy; }; /* Order of bands is important since the index is the band number. */ static const unsigned int tx_bands[] = { 80, 100, 120, 160, 200, 240, 320, 390, 450, 510, 560, 640, 690, 770, 870, 950, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2500 }; static int cdns_dsi_get_dphy_pll_cfg(struct cdns_dphy *dphy, struct cdns_dphy_cfg *cfg, struct phy_configure_opts_mipi_dphy *opts, unsigned int *dsi_hfp_ext) { unsigned long pll_ref_hz = clk_get_rate(dphy->pll_ref_clk); u64 dlane_bps; memset(cfg, 0, sizeof(*cfg)); if (pll_ref_hz < 9600000 || pll_ref_hz >= 150000000) return -EINVAL; else if (pll_ref_hz < 19200000) cfg->pll_ipdiv = 1; else if (pll_ref_hz < 38400000) cfg->pll_ipdiv = 2; else if (pll_ref_hz < 76800000) cfg->pll_ipdiv = 4; else cfg->pll_ipdiv = 8; dlane_bps = opts->hs_clk_rate; if (dlane_bps > 2500000000UL || dlane_bps < 160000000UL) return -EINVAL; else if (dlane_bps >= 1250000000) cfg->pll_opdiv = 1; else if (dlane_bps >= 630000000) cfg->pll_opdiv = 2; else if (dlane_bps >= 320000000) cfg->pll_opdiv = 4; else if (dlane_bps >= 160000000) cfg->pll_opdiv = 8; cfg->pll_fbdiv = DIV_ROUND_UP_ULL(dlane_bps * 2 * cfg->pll_opdiv * cfg->pll_ipdiv, pll_ref_hz); return 0; } static int cdns_dphy_setup_psm(struct cdns_dphy *dphy) { unsigned long psm_clk_hz = clk_get_rate(dphy->psm_clk); unsigned long psm_div; if (!psm_clk_hz || psm_clk_hz > 100000000) return -EINVAL; psm_div = DIV_ROUND_CLOSEST(psm_clk_hz, 1000000); if (dphy->ops->set_psm_div) dphy->ops->set_psm_div(dphy, psm_div); return 0; } static void cdns_dphy_set_clk_lane_cfg(struct cdns_dphy *dphy, enum cdns_dphy_clk_lane_cfg cfg) { if (dphy->ops->set_clk_lane_cfg) dphy->ops->set_clk_lane_cfg(dphy, cfg); } static void cdns_dphy_set_pll_cfg(struct cdns_dphy *dphy, const struct cdns_dphy_cfg *cfg) { if (dphy->ops->set_pll_cfg) dphy->ops->set_pll_cfg(dphy, cfg); } static unsigned long cdns_dphy_get_wakeup_time_ns(struct cdns_dphy *dphy) { return dphy->ops->get_wakeup_time_ns(dphy); } static unsigned long cdns_dphy_ref_get_wakeup_time_ns(struct cdns_dphy *dphy) { /* Default wakeup time is 800 ns (in a simulated environment). */ return 800; } static void cdns_dphy_ref_set_pll_cfg(struct cdns_dphy *dphy, const struct cdns_dphy_cfg *cfg) { u32 fbdiv_low, fbdiv_high; fbdiv_low = (cfg->pll_fbdiv / 4) - 2; fbdiv_high = cfg->pll_fbdiv - fbdiv_low - 2; writel(DPHY_CMN_IPDIV_FROM_REG | DPHY_CMN_OPDIV_FROM_REG | DPHY_CMN_IPDIV(cfg->pll_ipdiv) | DPHY_CMN_OPDIV(cfg->pll_opdiv), dphy->regs + DPHY_CMN_OPIPDIV); writel(DPHY_CMN_FBDIV_FROM_REG | DPHY_CMN_FBDIV_VAL(fbdiv_low, fbdiv_high), dphy->regs + DPHY_CMN_FBDIV); writel(DPHY_CMN_PWM_HIGH(6) | DPHY_CMN_PWM_LOW(0x101) | DPHY_CMN_PWM_DIV(0x8), dphy->regs + DPHY_CMN_PWM); } static void cdns_dphy_ref_set_psm_div(struct cdns_dphy *dphy, u8 div) { writel(DPHY_PSM_CFG_FROM_REG | DPHY_PSM_CLK_DIV(div), dphy->regs + DPHY_PSM_CFG); } static unsigned long cdns_dphy_j721e_get_wakeup_time_ns(struct cdns_dphy *dphy) { /* Minimum wakeup time as per MIPI D-PHY spec v1.2 */ return 1000000; } static void cdns_dphy_j721e_set_pll_cfg(struct cdns_dphy *dphy, const struct cdns_dphy_cfg *cfg) { u32 status; /* * set the PWM and PLL Byteclk divider settings to recommended values * which is same as that of in ref ops */ writel(DPHY_CMN_PWM_HIGH(6) | DPHY_CMN_PWM_LOW(0x101) | DPHY_CMN_PWM_DIV(0x8), dphy->regs + DPHY_CMN_PWM); writel((FIELD_PREP(DPHY_TX_J721E_WIZ_IPDIV, cfg->pll_ipdiv) | FIELD_PREP(DPHY_TX_J721E_WIZ_OPDIV, cfg->pll_opdiv) | FIELD_PREP(DPHY_TX_J721E_WIZ_FBDIV, cfg->pll_fbdiv)), dphy->regs + DPHY_TX_J721E_WIZ_PLL_CTRL); writel(DPHY_TX_J721E_WIZ_LANE_RSTB, dphy->regs + DPHY_TX_J721E_WIZ_RST_CTRL); readl_poll_timeout(dphy->regs + DPHY_TX_J721E_WIZ_PLL_CTRL, status, (status & DPHY_TX_WIZ_PLL_LOCK), 0, POLL_TIMEOUT_US); readl_poll_timeout(dphy->regs + DPHY_TX_J721E_WIZ_STATUS, status, (status & DPHY_TX_WIZ_O_CMN_READY), 0, POLL_TIMEOUT_US); } static void cdns_dphy_j721e_set_psm_div(struct cdns_dphy *dphy, u8 div) { writel(div, dphy->regs + DPHY_TX_J721E_WIZ_PSM_FREQ); } /* * This is the reference implementation of DPHY hooks. Specific integration of * this IP may have to re-implement some of them depending on how they decided * to wire things in the SoC. */ static const struct cdns_dphy_ops ref_dphy_ops = { .get_wakeup_time_ns = cdns_dphy_ref_get_wakeup_time_ns, .set_pll_cfg = cdns_dphy_ref_set_pll_cfg, .set_psm_div = cdns_dphy_ref_set_psm_div, }; static const struct cdns_dphy_ops j721e_dphy_ops = { .get_wakeup_time_ns = cdns_dphy_j721e_get_wakeup_time_ns, .set_pll_cfg = cdns_dphy_j721e_set_pll_cfg, .set_psm_div = cdns_dphy_j721e_set_psm_div, }; static int cdns_dphy_config_from_opts(struct phy *phy, struct phy_configure_opts_mipi_dphy *opts, struct cdns_dphy_cfg *cfg) { struct cdns_dphy *dphy = phy_get_drvdata(phy); unsigned int dsi_hfp_ext = 0; int ret; ret = phy_mipi_dphy_config_validate(opts); if (ret) return ret; ret = cdns_dsi_get_dphy_pll_cfg(dphy, cfg, opts, &dsi_hfp_ext); if (ret) return ret; opts->wakeup = cdns_dphy_get_wakeup_time_ns(dphy) / 1000; return 0; } static int cdns_dphy_tx_get_band_ctrl(unsigned long hs_clk_rate) { unsigned int rate; int i; rate = hs_clk_rate / 1000000UL; if (rate < tx_bands[0]) return -EOPNOTSUPP; for (i = 0; i < ARRAY_SIZE(tx_bands) - 1; i++) { if (rate >= tx_bands[i] && rate < tx_bands[i + 1]) return i; } return -EOPNOTSUPP; } static int cdns_dphy_validate(struct phy *phy, enum phy_mode mode, int submode, union phy_configure_opts *opts) { struct cdns_dphy_cfg cfg = { 0 }; if (mode != PHY_MODE_MIPI_DPHY) return -EINVAL; return cdns_dphy_config_from_opts(phy, &opts->mipi_dphy, &cfg); } static int cdns_dphy_configure(struct phy *phy, union phy_configure_opts *opts) { struct cdns_dphy *dphy = phy_get_drvdata(phy); struct cdns_dphy_cfg cfg = { 0 }; int ret, band_ctrl; unsigned int reg; ret = cdns_dphy_config_from_opts(phy, &opts->mipi_dphy, &cfg); if (ret) return ret; /* * Configure the internal PSM clk divider so that the DPHY has a * 1MHz clk (or something close). */ ret = cdns_dphy_setup_psm(dphy); if (ret) return ret; /* * Configure attach clk lanes to data lanes: the DPHY has 2 clk lanes * and 8 data lanes, each clk lane can be attache different set of * data lanes. The 2 groups are named 'left' and 'right', so here we * just say that we want the 'left' clk lane to drive the 'left' data * lanes. */ cdns_dphy_set_clk_lane_cfg(dphy, DPHY_CLK_CFG_LEFT_DRIVES_LEFT); /* * Configure the DPHY PLL that will be used to generate the TX byte * clk. */ cdns_dphy_set_pll_cfg(dphy, &cfg); band_ctrl = cdns_dphy_tx_get_band_ctrl(opts->mipi_dphy.hs_clk_rate); if (band_ctrl < 0) return band_ctrl; reg = FIELD_PREP(DPHY_BAND_CFG_LEFT_BAND, band_ctrl) | FIELD_PREP(DPHY_BAND_CFG_RIGHT_BAND, band_ctrl); writel(reg, dphy->regs + DPHY_BAND_CFG); return 0; } static int cdns_dphy_power_on(struct phy *phy) { struct cdns_dphy *dphy = phy_get_drvdata(phy); clk_prepare_enable(dphy->psm_clk); clk_prepare_enable(dphy->pll_ref_clk); /* Start TX state machine. */ writel(DPHY_CMN_SSM_EN | DPHY_CMN_TX_MODE_EN, dphy->regs + DPHY_CMN_SSM); return 0; } static int cdns_dphy_power_off(struct phy *phy) { struct cdns_dphy *dphy = phy_get_drvdata(phy); clk_disable_unprepare(dphy->pll_ref_clk); clk_disable_unprepare(dphy->psm_clk); return 0; } static const struct phy_ops cdns_dphy_ops = { .configure = cdns_dphy_configure, .validate = cdns_dphy_validate, .power_on = cdns_dphy_power_on, .power_off = cdns_dphy_power_off, }; static int cdns_dphy_probe(struct platform_device *pdev) { struct phy_provider *phy_provider; struct cdns_dphy *dphy; int ret; dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL); if (!dphy) return -ENOMEM; dev_set_drvdata(&pdev->dev, dphy); dphy->ops = of_device_get_match_data(&pdev->dev); if (!dphy->ops) return -EINVAL; dphy->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(dphy->regs)) return PTR_ERR(dphy->regs); dphy->psm_clk = devm_clk_get(&pdev->dev, "psm"); if (IS_ERR(dphy->psm_clk)) return PTR_ERR(dphy->psm_clk); dphy->pll_ref_clk = devm_clk_get(&pdev->dev, "pll_ref"); if (IS_ERR(dphy->pll_ref_clk)) return PTR_ERR(dphy->pll_ref_clk); if (dphy->ops->probe) { ret = dphy->ops->probe(dphy); if (ret) return ret; } dphy->phy = devm_phy_create(&pdev->dev, NULL, &cdns_dphy_ops); if (IS_ERR(dphy->phy)) { dev_err(&pdev->dev, "failed to create PHY\n"); if (dphy->ops->remove) dphy->ops->remove(dphy); return PTR_ERR(dphy->phy); } phy_set_drvdata(dphy->phy, dphy); phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate); return PTR_ERR_OR_ZERO(phy_provider); } static int cdns_dphy_remove(struct platform_device *pdev) { struct cdns_dphy *dphy = dev_get_drvdata(&pdev->dev); if (dphy->ops->remove) dphy->ops->remove(dphy); return 0; } static const struct of_device_id cdns_dphy_of_match[] = { { .compatible = "cdns,dphy", .data = &ref_dphy_ops }, { .compatible = "ti,j721e-dphy", .data = &j721e_dphy_ops }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, cdns_dphy_of_match); static struct platform_driver cdns_dphy_platform_driver = { .probe = cdns_dphy_probe, .remove = cdns_dphy_remove, .driver = { .name = "cdns-mipi-dphy", .of_match_table = cdns_dphy_of_match, }, }; module_platform_driver(cdns_dphy_platform_driver); MODULE_AUTHOR("Maxime Ripard <maxime.ripard@bootlin.com>"); MODULE_DESCRIPTION("Cadence MIPI D-PHY Driver"); MODULE_LICENSE("GPL");
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