| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Heiko Stübner | 1641 | 68.06% | 8 | 42.11% |
| Yunzhi Li | 573 | 23.77% | 1 | 5.26% |
| Sjoerd Simons | 98 | 4.06% | 1 | 5.26% |
| Randy Li | 61 | 2.53% | 1 | 5.26% |
| Huang Lin | 16 | 0.66% | 1 | 5.26% |
| Julia Lawall | 8 | 0.33% | 1 | 5.26% |
| Axel Lin | 6 | 0.25% | 2 | 10.53% |
| Sudip Mukherjee | 4 | 0.17% | 1 | 5.26% |
| Thomas Gleixner | 2 | 0.08% | 1 | 5.26% |
| Rob Herring | 1 | 0.04% | 1 | 5.26% |
| Stephen Boyd | 1 | 0.04% | 1 | 5.26% |
| Total | 2411 | 19 |
// SPDX-License-Identifier: GPL-2.0-only /* * Rockchip usb PHY driver * * Copyright (C) 2014 Yunzhi Li <lyz@rock-chips.com> * Copyright (C) 2014 ROCKCHIP, Inc. */ #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/of_address.h> #include <linux/of_platform.h> #include <linux/phy/phy.h> #include <linux/platform_device.h> #include <linux/regulator/consumer.h> #include <linux/reset.h> #include <linux/regmap.h> #include <linux/mfd/syscon.h> #include <linux/delay.h> static int enable_usb_uart; #define HIWORD_UPDATE(val, mask) \ ((val) | (mask) << 16) #define UOC_CON0 0x00 #define UOC_CON0_SIDDQ BIT(13) #define UOC_CON0_DISABLE BIT(4) #define UOC_CON0_COMMON_ON_N BIT(0) #define UOC_CON2 0x08 #define UOC_CON2_SOFT_CON_SEL BIT(2) #define UOC_CON3 0x0c /* bits present on rk3188 and rk3288 phys */ #define UOC_CON3_UTMI_TERMSEL_FULLSPEED BIT(5) #define UOC_CON3_UTMI_XCVRSEELCT_FSTRANSC (1 << 3) #define UOC_CON3_UTMI_XCVRSEELCT_MASK (3 << 3) #define UOC_CON3_UTMI_OPMODE_NODRIVING (1 << 1) #define UOC_CON3_UTMI_OPMODE_MASK (3 << 1) #define UOC_CON3_UTMI_SUSPENDN BIT(0) struct rockchip_usb_phys { int reg; const char *pll_name; }; struct rockchip_usb_phy_base; struct rockchip_usb_phy_pdata { struct rockchip_usb_phys *phys; int (*init_usb_uart)(struct regmap *grf, const struct rockchip_usb_phy_pdata *pdata); int usb_uart_phy; }; struct rockchip_usb_phy_base { struct device *dev; struct regmap *reg_base; const struct rockchip_usb_phy_pdata *pdata; }; struct rockchip_usb_phy { struct rockchip_usb_phy_base *base; struct device_node *np; unsigned int reg_offset; struct clk *clk; struct clk *clk480m; struct clk_hw clk480m_hw; struct phy *phy; bool uart_enabled; struct reset_control *reset; struct regulator *vbus; }; static int rockchip_usb_phy_power(struct rockchip_usb_phy *phy, bool siddq) { u32 val = HIWORD_UPDATE(siddq ? UOC_CON0_SIDDQ : 0, UOC_CON0_SIDDQ); return regmap_write(phy->base->reg_base, phy->reg_offset, val); } static unsigned long rockchip_usb_phy480m_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { return 480000000; } static void rockchip_usb_phy480m_disable(struct clk_hw *hw) { struct rockchip_usb_phy *phy = container_of(hw, struct rockchip_usb_phy, clk480m_hw); if (phy->vbus) regulator_disable(phy->vbus); /* Power down usb phy analog blocks by set siddq 1 */ rockchip_usb_phy_power(phy, 1); } static int rockchip_usb_phy480m_enable(struct clk_hw *hw) { struct rockchip_usb_phy *phy = container_of(hw, struct rockchip_usb_phy, clk480m_hw); /* Power up usb phy analog blocks by set siddq 0 */ return rockchip_usb_phy_power(phy, 0); } static int rockchip_usb_phy480m_is_enabled(struct clk_hw *hw) { struct rockchip_usb_phy *phy = container_of(hw, struct rockchip_usb_phy, clk480m_hw); int ret; u32 val; ret = regmap_read(phy->base->reg_base, phy->reg_offset, &val); if (ret < 0) return ret; return (val & UOC_CON0_SIDDQ) ? 0 : 1; } static const struct clk_ops rockchip_usb_phy480m_ops = { .enable = rockchip_usb_phy480m_enable, .disable = rockchip_usb_phy480m_disable, .is_enabled = rockchip_usb_phy480m_is_enabled, .recalc_rate = rockchip_usb_phy480m_recalc_rate, }; static int rockchip_usb_phy_power_off(struct phy *_phy) { struct rockchip_usb_phy *phy = phy_get_drvdata(_phy); if (phy->uart_enabled) return -EBUSY; clk_disable_unprepare(phy->clk480m); return 0; } static int rockchip_usb_phy_power_on(struct phy *_phy) { struct rockchip_usb_phy *phy = phy_get_drvdata(_phy); if (phy->uart_enabled) return -EBUSY; if (phy->vbus) { int ret; ret = regulator_enable(phy->vbus); if (ret) return ret; } return clk_prepare_enable(phy->clk480m); } static int rockchip_usb_phy_reset(struct phy *_phy) { struct rockchip_usb_phy *phy = phy_get_drvdata(_phy); if (phy->reset) { reset_control_assert(phy->reset); udelay(10); reset_control_deassert(phy->reset); } return 0; } static const struct phy_ops ops = { .power_on = rockchip_usb_phy_power_on, .power_off = rockchip_usb_phy_power_off, .reset = rockchip_usb_phy_reset, .owner = THIS_MODULE, }; static void rockchip_usb_phy_action(void *data) { struct rockchip_usb_phy *rk_phy = data; if (!rk_phy->uart_enabled) { of_clk_del_provider(rk_phy->np); clk_unregister(rk_phy->clk480m); } if (rk_phy->clk) clk_put(rk_phy->clk); } static int rockchip_usb_phy_init(struct rockchip_usb_phy_base *base, struct device_node *child) { struct rockchip_usb_phy *rk_phy; unsigned int reg_offset; const char *clk_name; struct clk_init_data init; int err, i; rk_phy = devm_kzalloc(base->dev, sizeof(*rk_phy), GFP_KERNEL); if (!rk_phy) return -ENOMEM; rk_phy->base = base; rk_phy->np = child; if (of_property_read_u32(child, "reg", ®_offset)) { dev_err(base->dev, "missing reg property in node %pOFn\n", child); return -EINVAL; } rk_phy->reset = of_reset_control_get(child, "phy-reset"); if (IS_ERR(rk_phy->reset)) rk_phy->reset = NULL; rk_phy->reg_offset = reg_offset; rk_phy->clk = of_clk_get_by_name(child, "phyclk"); if (IS_ERR(rk_phy->clk)) rk_phy->clk = NULL; i = 0; init.name = NULL; while (base->pdata->phys[i].reg) { if (base->pdata->phys[i].reg == reg_offset) { init.name = base->pdata->phys[i].pll_name; break; } i++; } if (!init.name) { dev_err(base->dev, "phy data not found\n"); return -EINVAL; } if (enable_usb_uart && base->pdata->usb_uart_phy == i) { dev_dbg(base->dev, "phy%d used as uart output\n", i); rk_phy->uart_enabled = true; } else { if (rk_phy->clk) { clk_name = __clk_get_name(rk_phy->clk); init.flags = 0; init.parent_names = &clk_name; init.num_parents = 1; } else { init.flags = 0; init.parent_names = NULL; init.num_parents = 0; } init.ops = &rockchip_usb_phy480m_ops; rk_phy->clk480m_hw.init = &init; rk_phy->clk480m = clk_register(base->dev, &rk_phy->clk480m_hw); if (IS_ERR(rk_phy->clk480m)) { err = PTR_ERR(rk_phy->clk480m); goto err_clk; } err = of_clk_add_provider(child, of_clk_src_simple_get, rk_phy->clk480m); if (err < 0) goto err_clk_prov; } err = devm_add_action_or_reset(base->dev, rockchip_usb_phy_action, rk_phy); if (err) return err; rk_phy->phy = devm_phy_create(base->dev, child, &ops); if (IS_ERR(rk_phy->phy)) { dev_err(base->dev, "failed to create PHY\n"); return PTR_ERR(rk_phy->phy); } phy_set_drvdata(rk_phy->phy, rk_phy); rk_phy->vbus = devm_regulator_get_optional(&rk_phy->phy->dev, "vbus"); if (IS_ERR(rk_phy->vbus)) { if (PTR_ERR(rk_phy->vbus) == -EPROBE_DEFER) return PTR_ERR(rk_phy->vbus); rk_phy->vbus = NULL; } /* * When acting as uart-pipe, just keep clock on otherwise * only power up usb phy when it use, so disable it when init */ if (rk_phy->uart_enabled) return clk_prepare_enable(rk_phy->clk); else return rockchip_usb_phy_power(rk_phy, 1); err_clk_prov: if (!rk_phy->uart_enabled) clk_unregister(rk_phy->clk480m); err_clk: if (rk_phy->clk) clk_put(rk_phy->clk); return err; } static const struct rockchip_usb_phy_pdata rk3066a_pdata = { .phys = (struct rockchip_usb_phys[]){ { .reg = 0x17c, .pll_name = "sclk_otgphy0_480m" }, { .reg = 0x188, .pll_name = "sclk_otgphy1_480m" }, { /* sentinel */ } }, }; static int __init rockchip_init_usb_uart_common(struct regmap *grf, const struct rockchip_usb_phy_pdata *pdata) { int regoffs = pdata->phys[pdata->usb_uart_phy].reg; int ret; u32 val; /* * COMMON_ON and DISABLE settings are described in the TRM, * but were not present in the original code. * Also disable the analog phy components to save power. */ val = HIWORD_UPDATE(UOC_CON0_COMMON_ON_N | UOC_CON0_DISABLE | UOC_CON0_SIDDQ, UOC_CON0_COMMON_ON_N | UOC_CON0_DISABLE | UOC_CON0_SIDDQ); ret = regmap_write(grf, regoffs + UOC_CON0, val); if (ret) return ret; val = HIWORD_UPDATE(UOC_CON2_SOFT_CON_SEL, UOC_CON2_SOFT_CON_SEL); ret = regmap_write(grf, regoffs + UOC_CON2, val); if (ret) return ret; val = HIWORD_UPDATE(UOC_CON3_UTMI_OPMODE_NODRIVING | UOC_CON3_UTMI_XCVRSEELCT_FSTRANSC | UOC_CON3_UTMI_TERMSEL_FULLSPEED, UOC_CON3_UTMI_SUSPENDN | UOC_CON3_UTMI_OPMODE_MASK | UOC_CON3_UTMI_XCVRSEELCT_MASK | UOC_CON3_UTMI_TERMSEL_FULLSPEED); ret = regmap_write(grf, UOC_CON3, val); if (ret) return ret; return 0; } #define RK3188_UOC0_CON0 0x10c #define RK3188_UOC0_CON0_BYPASSSEL BIT(9) #define RK3188_UOC0_CON0_BYPASSDMEN BIT(8) /* * Enable the bypass of uart2 data through the otg usb phy. * See description of rk3288-variant for details. */ static int __init rk3188_init_usb_uart(struct regmap *grf, const struct rockchip_usb_phy_pdata *pdata) { u32 val; int ret; ret = rockchip_init_usb_uart_common(grf, pdata); if (ret) return ret; val = HIWORD_UPDATE(RK3188_UOC0_CON0_BYPASSSEL | RK3188_UOC0_CON0_BYPASSDMEN, RK3188_UOC0_CON0_BYPASSSEL | RK3188_UOC0_CON0_BYPASSDMEN); ret = regmap_write(grf, RK3188_UOC0_CON0, val); if (ret) return ret; return 0; } static const struct rockchip_usb_phy_pdata rk3188_pdata = { .phys = (struct rockchip_usb_phys[]){ { .reg = 0x10c, .pll_name = "sclk_otgphy0_480m" }, { .reg = 0x11c, .pll_name = "sclk_otgphy1_480m" }, { /* sentinel */ } }, .init_usb_uart = rk3188_init_usb_uart, .usb_uart_phy = 0, }; #define RK3288_UOC0_CON3 0x32c #define RK3288_UOC0_CON3_BYPASSDMEN BIT(6) #define RK3288_UOC0_CON3_BYPASSSEL BIT(7) /* * Enable the bypass of uart2 data through the otg usb phy. * Original description in the TRM. * 1. Disable the OTG block by setting OTGDISABLE0 to 1’b1. * 2. Disable the pull-up resistance on the D+ line by setting * OPMODE0[1:0] to 2’b01. * 3. To ensure that the XO, Bias, and PLL blocks are powered down in Suspend * mode, set COMMONONN to 1’b1. * 4. Place the USB PHY in Suspend mode by setting SUSPENDM0 to 1’b0. * 5. Set BYPASSSEL0 to 1’b1. * 6. To transmit data, controls BYPASSDMEN0, and BYPASSDMDATA0. * To receive data, monitor FSVPLUS0. * * The actual code in the vendor kernel does some things differently. */ static int __init rk3288_init_usb_uart(struct regmap *grf, const struct rockchip_usb_phy_pdata *pdata) { u32 val; int ret; ret = rockchip_init_usb_uart_common(grf, pdata); if (ret) return ret; val = HIWORD_UPDATE(RK3288_UOC0_CON3_BYPASSSEL | RK3288_UOC0_CON3_BYPASSDMEN, RK3288_UOC0_CON3_BYPASSSEL | RK3288_UOC0_CON3_BYPASSDMEN); ret = regmap_write(grf, RK3288_UOC0_CON3, val); if (ret) return ret; return 0; } static const struct rockchip_usb_phy_pdata rk3288_pdata = { .phys = (struct rockchip_usb_phys[]){ { .reg = 0x320, .pll_name = "sclk_otgphy0_480m" }, { .reg = 0x334, .pll_name = "sclk_otgphy1_480m" }, { .reg = 0x348, .pll_name = "sclk_otgphy2_480m" }, { /* sentinel */ } }, .init_usb_uart = rk3288_init_usb_uart, .usb_uart_phy = 0, }; static int rockchip_usb_phy_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct rockchip_usb_phy_base *phy_base; struct phy_provider *phy_provider; const struct of_device_id *match; struct device_node *child; int err; phy_base = devm_kzalloc(dev, sizeof(*phy_base), GFP_KERNEL); if (!phy_base) return -ENOMEM; match = of_match_device(dev->driver->of_match_table, dev); if (!match || !match->data) { dev_err(dev, "missing phy data\n"); return -EINVAL; } phy_base->pdata = match->data; phy_base->dev = dev; phy_base->reg_base = ERR_PTR(-ENODEV); if (dev->parent && dev->parent->of_node) phy_base->reg_base = syscon_node_to_regmap( dev->parent->of_node); if (IS_ERR(phy_base->reg_base)) phy_base->reg_base = syscon_regmap_lookup_by_phandle( dev->of_node, "rockchip,grf"); if (IS_ERR(phy_base->reg_base)) { dev_err(&pdev->dev, "Missing rockchip,grf property\n"); return PTR_ERR(phy_base->reg_base); } for_each_available_child_of_node(dev->of_node, child) { err = rockchip_usb_phy_init(phy_base, child); if (err) { of_node_put(child); return err; } } phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); return PTR_ERR_OR_ZERO(phy_provider); } static const struct of_device_id rockchip_usb_phy_dt_ids[] = { { .compatible = "rockchip,rk3066a-usb-phy", .data = &rk3066a_pdata }, { .compatible = "rockchip,rk3188-usb-phy", .data = &rk3188_pdata }, { .compatible = "rockchip,rk3288-usb-phy", .data = &rk3288_pdata }, {} }; MODULE_DEVICE_TABLE(of, rockchip_usb_phy_dt_ids); static struct platform_driver rockchip_usb_driver = { .probe = rockchip_usb_phy_probe, .driver = { .name = "rockchip-usb-phy", .of_match_table = rockchip_usb_phy_dt_ids, }, }; module_platform_driver(rockchip_usb_driver); #ifndef MODULE static int __init rockchip_init_usb_uart(void) { const struct of_device_id *match; const struct rockchip_usb_phy_pdata *data; struct device_node *np; struct regmap *grf; int ret; if (!enable_usb_uart) return 0; np = of_find_matching_node_and_match(NULL, rockchip_usb_phy_dt_ids, &match); if (!np) { pr_err("%s: failed to find usbphy node\n", __func__); return -ENOTSUPP; } pr_debug("%s: using settings for %s\n", __func__, match->compatible); data = match->data; if (!data->init_usb_uart) { pr_err("%s: usb-uart not available on %s\n", __func__, match->compatible); return -ENOTSUPP; } grf = ERR_PTR(-ENODEV); if (np->parent) grf = syscon_node_to_regmap(np->parent); if (IS_ERR(grf)) grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf"); if (IS_ERR(grf)) { pr_err("%s: Missing rockchip,grf property, %lu\n", __func__, PTR_ERR(grf)); return PTR_ERR(grf); } ret = data->init_usb_uart(grf, data); if (ret) { pr_err("%s: could not init usb_uart, %d\n", __func__, ret); enable_usb_uart = 0; return ret; } return 0; } early_initcall(rockchip_init_usb_uart); static int __init rockchip_usb_uart(char *buf) { enable_usb_uart = true; return 0; } early_param("rockchip.usb_uart", rockchip_usb_uart); #endif MODULE_AUTHOR("Yunzhi Li <lyz@rock-chips.com>"); MODULE_DESCRIPTION("Rockchip USB 2.0 PHY driver"); MODULE_LICENSE("GPL v2");
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