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246 lines
5.9 KiB
246 lines
5.9 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* phy-da8xx-usb - TI DaVinci DA8xx USB PHY driver |
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* |
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* Copyright (C) 2016 David Lechner <[email protected]> |
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*/ |
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#include <linux/clk.h> |
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#include <linux/io.h> |
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#include <linux/of.h> |
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#include <linux/mfd/da8xx-cfgchip.h> |
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#include <linux/mfd/syscon.h> |
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#include <linux/module.h> |
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#include <linux/phy/phy.h> |
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#include <linux/platform_data/phy-da8xx-usb.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN) |
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struct da8xx_usb_phy { |
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struct phy_provider *phy_provider; |
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struct phy *usb11_phy; |
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struct phy *usb20_phy; |
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struct clk *usb11_clk; |
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struct clk *usb20_clk; |
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struct regmap *regmap; |
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}; |
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static int da8xx_usb11_phy_power_on(struct phy *phy) |
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{ |
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
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int ret; |
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ret = clk_prepare_enable(d_phy->usb11_clk); |
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if (ret) |
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return ret; |
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, |
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CFGCHIP2_USB1SUSPENDM); |
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return 0; |
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} |
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static int da8xx_usb11_phy_power_off(struct phy *phy) |
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{ |
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0); |
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clk_disable_unprepare(d_phy->usb11_clk); |
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return 0; |
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} |
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static const struct phy_ops da8xx_usb11_phy_ops = { |
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.power_on = da8xx_usb11_phy_power_on, |
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.power_off = da8xx_usb11_phy_power_off, |
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.owner = THIS_MODULE, |
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}; |
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static int da8xx_usb20_phy_power_on(struct phy *phy) |
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{ |
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
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int ret; |
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ret = clk_prepare_enable(d_phy->usb20_clk); |
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if (ret) |
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return ret; |
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0); |
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return 0; |
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} |
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static int da8xx_usb20_phy_power_off(struct phy *phy) |
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{ |
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, |
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CFGCHIP2_OTGPWRDN); |
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clk_disable_unprepare(d_phy->usb20_clk); |
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return 0; |
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} |
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static int da8xx_usb20_phy_set_mode(struct phy *phy, |
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enum phy_mode mode, int submode) |
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{ |
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struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy); |
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u32 val; |
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switch (mode) { |
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case PHY_MODE_USB_HOST: /* Force VBUS valid, ID = 0 */ |
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val = CFGCHIP2_OTGMODE_FORCE_HOST; |
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break; |
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case PHY_MODE_USB_DEVICE: /* Force VBUS valid, ID = 1 */ |
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val = CFGCHIP2_OTGMODE_FORCE_DEVICE; |
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break; |
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case PHY_MODE_USB_OTG: /* Don't override the VBUS/ID comparators */ |
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val = CFGCHIP2_OTGMODE_NO_OVERRIDE; |
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break; |
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default: |
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return -EINVAL; |
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} |
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK, |
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val); |
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return 0; |
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} |
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static const struct phy_ops da8xx_usb20_phy_ops = { |
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.power_on = da8xx_usb20_phy_power_on, |
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.power_off = da8xx_usb20_phy_power_off, |
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.set_mode = da8xx_usb20_phy_set_mode, |
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.owner = THIS_MODULE, |
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}; |
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static struct phy *da8xx_usb_phy_of_xlate(struct device *dev, |
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struct of_phandle_args *args) |
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{ |
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struct da8xx_usb_phy *d_phy = dev_get_drvdata(dev); |
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if (!d_phy) |
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return ERR_PTR(-ENODEV); |
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switch (args->args[0]) { |
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case 0: |
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return d_phy->usb20_phy; |
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case 1: |
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return d_phy->usb11_phy; |
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default: |
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return ERR_PTR(-EINVAL); |
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} |
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} |
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static int da8xx_usb_phy_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct da8xx_usb_phy_platform_data *pdata = dev->platform_data; |
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struct device_node *node = dev->of_node; |
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struct da8xx_usb_phy *d_phy; |
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d_phy = devm_kzalloc(dev, sizeof(*d_phy), GFP_KERNEL); |
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if (!d_phy) |
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return -ENOMEM; |
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if (pdata) |
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d_phy->regmap = pdata->cfgchip; |
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else |
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d_phy->regmap = syscon_regmap_lookup_by_compatible( |
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"ti,da830-cfgchip"); |
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if (IS_ERR(d_phy->regmap)) { |
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dev_err(dev, "Failed to get syscon\n"); |
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return PTR_ERR(d_phy->regmap); |
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} |
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d_phy->usb11_clk = devm_clk_get(dev, "usb1_clk48"); |
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if (IS_ERR(d_phy->usb11_clk)) { |
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dev_err(dev, "Failed to get usb1_clk48\n"); |
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return PTR_ERR(d_phy->usb11_clk); |
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} |
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d_phy->usb20_clk = devm_clk_get(dev, "usb0_clk48"); |
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if (IS_ERR(d_phy->usb20_clk)) { |
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dev_err(dev, "Failed to get usb0_clk48\n"); |
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return PTR_ERR(d_phy->usb20_clk); |
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} |
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d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops); |
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if (IS_ERR(d_phy->usb11_phy)) { |
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dev_err(dev, "Failed to create usb11 phy\n"); |
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return PTR_ERR(d_phy->usb11_phy); |
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} |
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d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops); |
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if (IS_ERR(d_phy->usb20_phy)) { |
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dev_err(dev, "Failed to create usb20 phy\n"); |
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return PTR_ERR(d_phy->usb20_phy); |
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} |
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platform_set_drvdata(pdev, d_phy); |
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phy_set_drvdata(d_phy->usb11_phy, d_phy); |
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phy_set_drvdata(d_phy->usb20_phy, d_phy); |
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if (node) { |
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d_phy->phy_provider = devm_of_phy_provider_register(dev, |
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da8xx_usb_phy_of_xlate); |
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if (IS_ERR(d_phy->phy_provider)) { |
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dev_err(dev, "Failed to create phy provider\n"); |
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return PTR_ERR(d_phy->phy_provider); |
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} |
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} else { |
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int ret; |
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ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy", |
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"ohci-da8xx"); |
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if (ret) |
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dev_warn(dev, "Failed to create usb11 phy lookup\n"); |
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ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy", |
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"musb-da8xx"); |
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if (ret) |
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dev_warn(dev, "Failed to create usb20 phy lookup\n"); |
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} |
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regmap_write_bits(d_phy->regmap, CFGCHIP(2), |
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PHY_INIT_BITS, PHY_INIT_BITS); |
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return 0; |
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} |
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static int da8xx_usb_phy_remove(struct platform_device *pdev) |
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{ |
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struct da8xx_usb_phy *d_phy = platform_get_drvdata(pdev); |
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if (!pdev->dev.of_node) { |
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phy_remove_lookup(d_phy->usb20_phy, "usb-phy", "musb-da8xx"); |
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phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci-da8xx"); |
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} |
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return 0; |
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} |
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static const struct of_device_id da8xx_usb_phy_ids[] = { |
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{ .compatible = "ti,da830-usb-phy" }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids); |
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static struct platform_driver da8xx_usb_phy_driver = { |
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.probe = da8xx_usb_phy_probe, |
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.remove = da8xx_usb_phy_remove, |
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.driver = { |
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.name = "da8xx-usb-phy", |
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.of_match_table = da8xx_usb_phy_ids, |
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}, |
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}; |
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module_platform_driver(da8xx_usb_phy_driver); |
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MODULE_ALIAS("platform:da8xx-usb-phy"); |
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MODULE_AUTHOR("David Lechner <[email protected]>"); |
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MODULE_DESCRIPTION("TI DA8xx USB PHY driver"); |
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MODULE_LICENSE("GPL v2");
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