Orange Pi5 kernel

^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)  * Samsung Exynos USB HOST EHCI Controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2011 Samsung Electronics Co.Ltd
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Author: Jingoo Han <jg1.han@samsung.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Author: Joonyoung Shim <jy0922.shim@samsung.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/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/dma-mapping.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/of_gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/phy/phy.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/usb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/usb/hcd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include "ehci.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define DRIVER_DESC "EHCI Exynos driver"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define EHCI_INSNREG00(base)			(base + 0x90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define EHCI_INSNREG00_ENA_INCR16		(0x1 << 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define EHCI_INSNREG00_ENA_INCR8		(0x1 << 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define EHCI_INSNREG00_ENA_INCR4		(0x1 << 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define EHCI_INSNREG00_ENA_INCRX_ALIGN		(0x1 << 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define EHCI_INSNREG00_ENABLE_DMA_BURST	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	(EHCI_INSNREG00_ENA_INCR16 | EHCI_INSNREG00_ENA_INCR8 |	\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	 EHCI_INSNREG00_ENA_INCR4 | EHCI_INSNREG00_ENA_INCRX_ALIGN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static const char hcd_name[] = "ehci-exynos";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) static struct hc_driver __read_mostly exynos_ehci_hc_driver;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define PHY_NUMBER 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) struct exynos_ehci_hcd {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	struct clk *clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	struct device_node *of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	struct phy *phy[PHY_NUMBER];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	bool legacy_phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) #define to_exynos_ehci(hcd) (struct exynos_ehci_hcd *)(hcd_to_ehci(hcd)->priv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) static int exynos_ehci_get_phy(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 				struct exynos_ehci_hcd *exynos_ehci)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	struct device_node *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	struct phy *phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	int phy_number, num_phys;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	/* Get PHYs for the controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	num_phys = of_count_phandle_with_args(dev->of_node, "phys",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 					      "#phy-cells");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	for (phy_number = 0; phy_number < num_phys; phy_number++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		phy = devm_of_phy_get_by_index(dev, dev->of_node, phy_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		if (IS_ERR(phy))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 			return PTR_ERR(phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		exynos_ehci->phy[phy_number] = phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	if (num_phys > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	/* Get PHYs using legacy bindings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	for_each_available_child_of_node(dev->of_node, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		ret = of_property_read_u32(child, "reg", &phy_number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 			dev_err(dev, "Failed to parse device tree\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 			of_node_put(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		if (phy_number >= PHY_NUMBER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 			dev_err(dev, "Invalid number of PHYs\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 			of_node_put(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		phy = devm_of_phy_get(dev, child, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		exynos_ehci->phy[phy_number] = phy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		if (IS_ERR(phy)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 			ret = PTR_ERR(phy);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			if (ret == -EPROBE_DEFER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 				of_node_put(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 				return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			} else if (ret != -ENOSYS && ret != -ENODEV) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 				dev_err(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 					"Error retrieving usb2 phy: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 				of_node_put(child);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 				return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		}
^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) 	exynos_ehci->legacy_phy = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	return 0;
^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) static int exynos_ehci_phy_enable(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	struct usb_hcd *hcd = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	for (i = 0; ret == 0 && i < PHY_NUMBER; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		if (!IS_ERR(exynos_ehci->phy[i]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			ret = phy_power_on(exynos_ehci->phy[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 		for (i--; i >= 0; i--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			if (!IS_ERR(exynos_ehci->phy[i]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 				phy_power_off(exynos_ehci->phy[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static void exynos_ehci_phy_disable(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	struct usb_hcd *hcd = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	for (i = 0; i < PHY_NUMBER; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		if (!IS_ERR(exynos_ehci->phy[i]))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 			phy_power_off(exynos_ehci->phy[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static void exynos_setup_vbus_gpio(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	int gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	if (!dev->of_node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	gpio = of_get_named_gpio(dev->of_node, "samsung,vbus-gpio", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	if (!gpio_is_valid(gpio))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	err = devm_gpio_request_one(dev, gpio, GPIOF_OUT_INIT_HIGH,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 				    "ehci_vbus_gpio");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		dev_err(dev, "can't request ehci vbus gpio %d", gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static int exynos_ehci_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	struct exynos_ehci_hcd *exynos_ehci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	struct usb_hcd *hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	struct ehci_hcd *ehci;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	struct resource *res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	 * Right now device-tree probed devices don't get dma_mask set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	 * Since shared usb code relies on it, set it here for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	 * Once we move to full device tree support this will vanish off.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	exynos_setup_vbus_gpio(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	hcd = usb_create_hcd(&exynos_ehci_hc_driver,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 			     &pdev->dev, dev_name(&pdev->dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (!hcd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		dev_err(&pdev->dev, "Unable to create HCD\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	exynos_ehci = to_exynos_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	err = exynos_ehci_get_phy(&pdev->dev, exynos_ehci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		goto fail_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	exynos_ehci->clk = devm_clk_get(&pdev->dev, "usbhost");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	if (IS_ERR(exynos_ehci->clk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		dev_err(&pdev->dev, "Failed to get usbhost clock\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		err = PTR_ERR(exynos_ehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		goto fail_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	err = clk_prepare_enable(exynos_ehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		goto fail_clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	if (IS_ERR(hcd->regs)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		err = PTR_ERR(hcd->regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		goto fail_io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	hcd->rsrc_start = res->start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	hcd->rsrc_len = resource_size(res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	if (irq < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		err = irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		goto fail_io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	err = exynos_ehci_phy_enable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		dev_err(&pdev->dev, "Failed to enable USB phy\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		goto fail_io;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	ehci = hcd_to_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	ehci->caps = hcd->regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	 * Workaround: reset of_node pointer to avoid conflict between legacy
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	 * Exynos EHCI port subnodes and generic USB device bindings
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	exynos_ehci->of_node = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	if (exynos_ehci->legacy_phy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		pdev->dev.of_node = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	/* DMA burst Enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	err = usb_add_hcd(hcd, irq, IRQF_SHARED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 		dev_err(&pdev->dev, "Failed to add USB HCD\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		goto fail_add_hcd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	device_wakeup_enable(hcd->self.controller);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	platform_set_drvdata(pdev, hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) fail_add_hcd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	exynos_ehci_phy_disable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	pdev->dev.of_node = exynos_ehci->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) fail_io:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	clk_disable_unprepare(exynos_ehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) fail_clk:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) static int exynos_ehci_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	struct usb_hcd *hcd = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	pdev->dev.of_node = exynos_ehci->of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	usb_remove_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	exynos_ehci_phy_disable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	clk_disable_unprepare(exynos_ehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	usb_put_hcd(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) static int exynos_ehci_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	struct usb_hcd *hcd = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	bool do_wakeup = device_may_wakeup(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	rc = ehci_suspend(hcd, do_wakeup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	exynos_ehci_phy_disable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	clk_disable_unprepare(exynos_ehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) static int exynos_ehci_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	struct usb_hcd *hcd = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	struct exynos_ehci_hcd *exynos_ehci = to_exynos_ehci(hcd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	ret = clk_prepare_enable(exynos_ehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	ret = exynos_ehci_phy_enable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 		dev_err(dev, "Failed to enable USB phy\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 		clk_disable_unprepare(exynos_ehci->clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	/* DMA burst Enable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	writel(EHCI_INSNREG00_ENABLE_DMA_BURST, EHCI_INSNREG00(hcd->regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	ehci_resume(hcd, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) #define exynos_ehci_suspend	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) #define exynos_ehci_resume	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static const struct dev_pm_ops exynos_ehci_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	.suspend	= exynos_ehci_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	.resume		= exynos_ehci_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) static const struct of_device_id exynos_ehci_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	{ .compatible = "samsung,exynos4210-ehci" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) MODULE_DEVICE_TABLE(of, exynos_ehci_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) static struct platform_driver exynos_ehci_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	.probe		= exynos_ehci_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	.remove		= exynos_ehci_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	.shutdown	= usb_hcd_platform_shutdown,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		.name	= "exynos-ehci",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 		.pm	= &exynos_ehci_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 		.of_match_table = of_match_ptr(exynos_ehci_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static const struct ehci_driver_overrides exynos_overrides __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	.extra_priv_size = sizeof(struct exynos_ehci_hcd),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) static int __init ehci_exynos_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	if (usb_disabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	pr_info("%s: " DRIVER_DESC "\n", hcd_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	ehci_init_driver(&exynos_ehci_hc_driver, &exynos_overrides);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	return platform_driver_register(&exynos_ehci_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) module_init(ehci_exynos_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) static void __exit ehci_exynos_cleanup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	platform_driver_unregister(&exynos_ehci_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) module_exit(ehci_exynos_cleanup);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) MODULE_DESCRIPTION(DRIVER_DESC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) MODULE_ALIAS("platform:exynos-ehci");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) MODULE_AUTHOR("Jingoo Han");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) MODULE_AUTHOR("Joonyoung Shim");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) MODULE_LICENSE("GPL v2");