^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * phy-keystone - USB PHY, talking to dwc3 controller in Keystone.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: WingMan Kwok <w-kwok2@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/usb/usb_phy_generic.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "phy-generic.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) /* USB PHY control register offsets */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define USB_PHY_CTL_UTMI 0x0000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define USB_PHY_CTL_PIPE 0x0004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define USB_PHY_CTL_PARAM_1 0x0008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define USB_PHY_CTL_PARAM_2 0x000c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define USB_PHY_CTL_CLOCK 0x0010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define USB_PHY_CTL_PLL 0x0014
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define PHY_REF_SSP_EN BIT(29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct keystone_usbphy {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct usb_phy_generic usb_phy_gen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) void __iomem *phy_ctrl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static inline u32 keystone_usbphy_readl(void __iomem *base, u32 offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return readl(base + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static inline void keystone_usbphy_writel(void __iomem *base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) u32 offset, u32 value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) writel(value, base + offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) static int keystone_usbphy_init(struct usb_phy *phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct keystone_usbphy *k_phy = dev_get_drvdata(phy->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) val = keystone_usbphy_readl(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) keystone_usbphy_writel(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) val | PHY_REF_SSP_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static void keystone_usbphy_shutdown(struct usb_phy *phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct keystone_usbphy *k_phy = dev_get_drvdata(phy->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) u32 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) val = keystone_usbphy_readl(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) keystone_usbphy_writel(k_phy->phy_ctrl, USB_PHY_CTL_CLOCK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) val &= ~PHY_REF_SSP_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int keystone_usbphy_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct keystone_usbphy *k_phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) k_phy = devm_kzalloc(dev, sizeof(*k_phy), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (!k_phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) k_phy->phy_ctrl = devm_platform_ioremap_resource(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) if (IS_ERR(k_phy->phy_ctrl))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return PTR_ERR(k_phy->phy_ctrl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = usb_phy_gen_create_phy(dev, &k_phy->usb_phy_gen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) k_phy->usb_phy_gen.phy.init = keystone_usbphy_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) k_phy->usb_phy_gen.phy.shutdown = keystone_usbphy_shutdown;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) platform_set_drvdata(pdev, k_phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return usb_add_phy_dev(&k_phy->usb_phy_gen.phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static int keystone_usbphy_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) struct keystone_usbphy *k_phy = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) usb_remove_phy(&k_phy->usb_phy_gen.phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static const struct of_device_id keystone_usbphy_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) { .compatible = "ti,keystone-usbphy" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) MODULE_DEVICE_TABLE(of, keystone_usbphy_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static struct platform_driver keystone_usbphy_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .probe = keystone_usbphy_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .remove = keystone_usbphy_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .name = "keystone-usbphy",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .of_match_table = keystone_usbphy_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) module_platform_driver(keystone_usbphy_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) MODULE_ALIAS("platform:keystone-usbphy");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) MODULE_AUTHOR("Texas Instruments Inc.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) MODULE_DESCRIPTION("Keystone USB phy driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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