| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Aswath Govindraju | 1295 | 91.91% | 2 | 25.00% |
| Ladislav Michl | 57 | 4.05% | 1 | 12.50% |
| Roger Quadros | 49 | 3.48% | 2 | 25.00% |
| Yang Yingliang | 5 | 0.35% | 1 | 12.50% |
| Uwe Kleine-König | 2 | 0.14% | 1 | 12.50% |
| Rob Herring | 1 | 0.07% | 1 | 12.50% |
| Total | 1409 | 8 |
// SPDX-License-Identifier: GPL-2.0 /* * dwc3-am62.c - TI specific Glue layer for AM62 DWC3 USB Controller * * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com */ #include <linux/init.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/mfd/syscon.h> #include <linux/of.h> #include <linux/of_platform.h> #include <linux/pm_runtime.h> #include <linux/clk.h> #include <linux/regmap.h> #include <linux/pinctrl/consumer.h> #include "core.h" /* USB WRAPPER register offsets */ #define USBSS_PID 0x0 #define USBSS_OVERCURRENT_CTRL 0x4 #define USBSS_PHY_CONFIG 0x8 #define USBSS_PHY_TEST 0xc #define USBSS_CORE_STAT 0x14 #define USBSS_HOST_VBUS_CTRL 0x18 #define USBSS_MODE_CONTROL 0x1c #define USBSS_WAKEUP_CONFIG 0x30 #define USBSS_WAKEUP_STAT 0x34 #define USBSS_OVERRIDE_CONFIG 0x38 #define USBSS_IRQ_MISC_STATUS_RAW 0x430 #define USBSS_IRQ_MISC_STATUS 0x434 #define USBSS_IRQ_MISC_ENABLE_SET 0x438 #define USBSS_IRQ_MISC_ENABLE_CLR 0x43c #define USBSS_IRQ_MISC_EOI 0x440 #define USBSS_INTR_TEST 0x490 #define USBSS_VBUS_FILTER 0x614 #define USBSS_VBUS_STAT 0x618 #define USBSS_DEBUG_CFG 0x708 #define USBSS_DEBUG_DATA 0x70c #define USBSS_HOST_HUB_CTRL 0x714 /* PHY CONFIG register bits */ #define USBSS_PHY_VBUS_SEL_MASK GENMASK(2, 1) #define USBSS_PHY_VBUS_SEL_SHIFT 1 #define USBSS_PHY_LANE_REVERSE BIT(0) /* CORE STAT register bits */ #define USBSS_CORE_OPERATIONAL_MODE_MASK GENMASK(13, 12) #define USBSS_CORE_OPERATIONAL_MODE_SHIFT 12 /* MODE CONTROL register bits */ #define USBSS_MODE_VALID BIT(0) /* WAKEUP CONFIG register bits */ #define USBSS_WAKEUP_CFG_OVERCURRENT_EN BIT(3) #define USBSS_WAKEUP_CFG_LINESTATE_EN BIT(2) #define USBSS_WAKEUP_CFG_SESSVALID_EN BIT(1) #define USBSS_WAKEUP_CFG_VBUSVALID_EN BIT(0) #define USBSS_WAKEUP_CFG_ALL (USBSS_WAKEUP_CFG_VBUSVALID_EN | \ USBSS_WAKEUP_CFG_SESSVALID_EN | \ USBSS_WAKEUP_CFG_LINESTATE_EN | \ USBSS_WAKEUP_CFG_OVERCURRENT_EN) #define USBSS_WAKEUP_CFG_NONE 0 /* WAKEUP STAT register bits */ #define USBSS_WAKEUP_STAT_OVERCURRENT BIT(4) #define USBSS_WAKEUP_STAT_LINESTATE BIT(3) #define USBSS_WAKEUP_STAT_SESSVALID BIT(2) #define USBSS_WAKEUP_STAT_VBUSVALID BIT(1) #define USBSS_WAKEUP_STAT_CLR BIT(0) /* IRQ_MISC_STATUS_RAW register bits */ #define USBSS_IRQ_MISC_RAW_VBUSVALID BIT(22) #define USBSS_IRQ_MISC_RAW_SESSVALID BIT(20) /* IRQ_MISC_STATUS register bits */ #define USBSS_IRQ_MISC_VBUSVALID BIT(22) #define USBSS_IRQ_MISC_SESSVALID BIT(20) /* IRQ_MISC_ENABLE_SET register bits */ #define USBSS_IRQ_MISC_ENABLE_SET_VBUSVALID BIT(22) #define USBSS_IRQ_MISC_ENABLE_SET_SESSVALID BIT(20) /* IRQ_MISC_ENABLE_CLR register bits */ #define USBSS_IRQ_MISC_ENABLE_CLR_VBUSVALID BIT(22) #define USBSS_IRQ_MISC_ENABLE_CLR_SESSVALID BIT(20) /* IRQ_MISC_EOI register bits */ #define USBSS_IRQ_MISC_EOI_VECTOR BIT(0) /* VBUS_STAT register bits */ #define USBSS_VBUS_STAT_SESSVALID BIT(2) #define USBSS_VBUS_STAT_VBUSVALID BIT(0) /* Mask for PHY PLL REFCLK */ #define PHY_PLL_REFCLK_MASK GENMASK(3, 0) #define DWC3_AM62_AUTOSUSPEND_DELAY 100 struct dwc3_am62 { struct device *dev; void __iomem *usbss; struct clk *usb2_refclk; int rate_code; struct regmap *syscon; unsigned int offset; unsigned int vbus_divider; u32 wakeup_stat; }; static const int dwc3_ti_rate_table[] = { /* in KHZ */ 9600, 10000, 12000, 19200, 20000, 24000, 25000, 26000, 38400, 40000, 58000, 50000, 52000, }; static inline u32 dwc3_ti_readl(struct dwc3_am62 *am62, u32 offset) { return readl((am62->usbss) + offset); } static inline void dwc3_ti_writel(struct dwc3_am62 *am62, u32 offset, u32 value) { writel(value, (am62->usbss) + offset); } static int phy_syscon_pll_refclk(struct dwc3_am62 *am62) { struct device *dev = am62->dev; struct device_node *node = dev->of_node; struct of_phandle_args args; struct regmap *syscon; int ret; syscon = syscon_regmap_lookup_by_phandle(node, "ti,syscon-phy-pll-refclk"); if (IS_ERR(syscon)) { dev_err(dev, "unable to get ti,syscon-phy-pll-refclk regmap\n"); return PTR_ERR(syscon); } am62->syscon = syscon; ret = of_parse_phandle_with_fixed_args(node, "ti,syscon-phy-pll-refclk", 1, 0, &args); if (ret) return ret; am62->offset = args.args[0]; ret = regmap_update_bits(am62->syscon, am62->offset, PHY_PLL_REFCLK_MASK, am62->rate_code); if (ret) { dev_err(dev, "failed to set phy pll reference clock rate\n"); return ret; } return 0; } static int dwc3_ti_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *node = pdev->dev.of_node; struct dwc3_am62 *am62; int i, ret; unsigned long rate; u32 reg; am62 = devm_kzalloc(dev, sizeof(*am62), GFP_KERNEL); if (!am62) return -ENOMEM; am62->dev = dev; platform_set_drvdata(pdev, am62); am62->usbss = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(am62->usbss)) { dev_err(dev, "can't map IOMEM resource\n"); return PTR_ERR(am62->usbss); } am62->usb2_refclk = devm_clk_get(dev, "ref"); if (IS_ERR(am62->usb2_refclk)) { dev_err(dev, "can't get usb2_refclk\n"); return PTR_ERR(am62->usb2_refclk); } /* Calculate the rate code */ rate = clk_get_rate(am62->usb2_refclk); rate /= 1000; // To KHz for (i = 0; i < ARRAY_SIZE(dwc3_ti_rate_table); i++) { if (dwc3_ti_rate_table[i] == rate) break; } if (i == ARRAY_SIZE(dwc3_ti_rate_table)) { dev_err(dev, "unsupported usb2_refclk rate: %lu KHz\n", rate); return -EINVAL; } am62->rate_code = i; /* Read the syscon property and set the rate code */ ret = phy_syscon_pll_refclk(am62); if (ret) return ret; /* VBUS divider select */ am62->vbus_divider = device_property_read_bool(dev, "ti,vbus-divider"); reg = dwc3_ti_readl(am62, USBSS_PHY_CONFIG); if (am62->vbus_divider) reg |= 1 << USBSS_PHY_VBUS_SEL_SHIFT; dwc3_ti_writel(am62, USBSS_PHY_CONFIG, reg); pm_runtime_set_active(dev); pm_runtime_enable(dev); /* * Don't ignore its dependencies with its children */ pm_suspend_ignore_children(dev, false); clk_prepare_enable(am62->usb2_refclk); pm_runtime_get_noresume(dev); ret = of_platform_populate(node, NULL, NULL, dev); if (ret) { dev_err(dev, "failed to create dwc3 core: %d\n", ret); goto err_pm_disable; } /* Set mode valid bit to indicate role is valid */ reg = dwc3_ti_readl(am62, USBSS_MODE_CONTROL); reg |= USBSS_MODE_VALID; dwc3_ti_writel(am62, USBSS_MODE_CONTROL, reg); /* Device has capability to wakeup system from sleep */ device_set_wakeup_capable(dev, true); ret = device_wakeup_enable(dev); if (ret) dev_err(dev, "couldn't enable device as a wakeup source: %d\n", ret); /* Setting up autosuspend */ pm_runtime_set_autosuspend_delay(dev, DWC3_AM62_AUTOSUSPEND_DELAY); pm_runtime_use_autosuspend(dev); pm_runtime_mark_last_busy(dev); pm_runtime_put_autosuspend(dev); return 0; err_pm_disable: clk_disable_unprepare(am62->usb2_refclk); pm_runtime_disable(dev); pm_runtime_set_suspended(dev); return ret; } static int dwc3_ti_remove_core(struct device *dev, void *c) { struct platform_device *pdev = to_platform_device(dev); platform_device_unregister(pdev); return 0; } static void dwc3_ti_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct dwc3_am62 *am62 = platform_get_drvdata(pdev); u32 reg; device_for_each_child(dev, NULL, dwc3_ti_remove_core); /* Clear mode valid bit */ reg = dwc3_ti_readl(am62, USBSS_MODE_CONTROL); reg &= ~USBSS_MODE_VALID; dwc3_ti_writel(am62, USBSS_MODE_CONTROL, reg); pm_runtime_put_sync(dev); clk_disable_unprepare(am62->usb2_refclk); pm_runtime_disable(dev); pm_runtime_set_suspended(dev); } #ifdef CONFIG_PM static int dwc3_ti_suspend_common(struct device *dev) { struct dwc3_am62 *am62 = dev_get_drvdata(dev); u32 reg, current_prtcap_dir; if (device_may_wakeup(dev)) { reg = dwc3_ti_readl(am62, USBSS_CORE_STAT); current_prtcap_dir = (reg & USBSS_CORE_OPERATIONAL_MODE_MASK) >> USBSS_CORE_OPERATIONAL_MODE_SHIFT; /* Set wakeup config enable bits */ reg = dwc3_ti_readl(am62, USBSS_WAKEUP_CONFIG); if (current_prtcap_dir == DWC3_GCTL_PRTCAP_HOST) { reg = USBSS_WAKEUP_CFG_LINESTATE_EN | USBSS_WAKEUP_CFG_OVERCURRENT_EN; } else { reg = USBSS_WAKEUP_CFG_VBUSVALID_EN | USBSS_WAKEUP_CFG_SESSVALID_EN; /* * Enable LINESTATE wake up only if connected to bus * and in U2/L3 state else it causes spurious wake-up. */ } dwc3_ti_writel(am62, USBSS_WAKEUP_CONFIG, reg); /* clear wakeup status so we know what caused the wake up */ dwc3_ti_writel(am62, USBSS_WAKEUP_STAT, USBSS_WAKEUP_STAT_CLR); } clk_disable_unprepare(am62->usb2_refclk); return 0; } static int dwc3_ti_resume_common(struct device *dev) { struct dwc3_am62 *am62 = dev_get_drvdata(dev); u32 reg; clk_prepare_enable(am62->usb2_refclk); if (device_may_wakeup(dev)) { /* Clear wakeup config enable bits */ dwc3_ti_writel(am62, USBSS_WAKEUP_CONFIG, USBSS_WAKEUP_CFG_NONE); } reg = dwc3_ti_readl(am62, USBSS_WAKEUP_STAT); am62->wakeup_stat = reg; return 0; } static UNIVERSAL_DEV_PM_OPS(dwc3_ti_pm_ops, dwc3_ti_suspend_common, dwc3_ti_resume_common, NULL); #define DEV_PM_OPS (&dwc3_ti_pm_ops) #else #define DEV_PM_OPS NULL #endif /* CONFIG_PM */ static const struct of_device_id dwc3_ti_of_match[] = { { .compatible = "ti,am62-usb"}, {}, }; MODULE_DEVICE_TABLE(of, dwc3_ti_of_match); static struct platform_driver dwc3_ti_driver = { .probe = dwc3_ti_probe, .remove_new = dwc3_ti_remove, .driver = { .name = "dwc3-am62", .pm = DEV_PM_OPS, .of_match_table = dwc3_ti_of_match, }, }; module_platform_driver(dwc3_ti_driver); MODULE_ALIAS("platform:dwc3-am62"); MODULE_AUTHOR("Aswath Govindraju <a-govindraju@ti.com>"); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("DesignWare USB3 TI Glue Layer");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1