Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 1 | /** |
| 2 | * dwc3-exynos.c - Samsung EXYNOS DWC3 Specific Glue layer |
| 3 | * |
| 4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. |
| 5 | * http://www.samsung.com |
| 6 | * |
| 7 | * Author: Anton Tikhomirov <av.tikhomirov@samsung.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/kernel.h> |
| 17 | #include <linux/slab.h> |
| 18 | #include <linux/platform_device.h> |
| 19 | #include <linux/platform_data/dwc3-exynos.h> |
| 20 | #include <linux/dma-mapping.h> |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 21 | #include <linux/clk.h> |
Felipe Balbi | d720f05 | 2012-07-19 14:01:10 +0300 | [diff] [blame] | 22 | #include <linux/usb/otg.h> |
| 23 | #include <linux/usb/nop-usb-xceiv.h> |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 24 | |
| 25 | #include "core.h" |
| 26 | |
| 27 | struct dwc3_exynos { |
| 28 | struct platform_device *dwc3; |
Felipe Balbi | d720f05 | 2012-07-19 14:01:10 +0300 | [diff] [blame] | 29 | struct platform_device *usb2_phy; |
| 30 | struct platform_device *usb3_phy; |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 31 | struct device *dev; |
| 32 | |
| 33 | struct clk *clk; |
| 34 | }; |
| 35 | |
Felipe Balbi | d720f05 | 2012-07-19 14:01:10 +0300 | [diff] [blame] | 36 | static int __devinit dwc3_exynos_register_phys(struct dwc3_exynos *exynos) |
| 37 | { |
| 38 | struct nop_usb_xceiv_platform_data pdata; |
| 39 | struct platform_device *pdev; |
| 40 | int ret; |
| 41 | |
| 42 | memset(&pdata, 0x00, sizeof(pdata)); |
| 43 | |
| 44 | pdev = platform_device_alloc("nop_usb_xceiv", 0); |
| 45 | if (!pdev) |
| 46 | return -ENOMEM; |
| 47 | |
| 48 | exynos->usb2_phy = pdev; |
| 49 | pdata.type = USB_PHY_TYPE_USB2; |
| 50 | |
| 51 | ret = platform_device_add_data(exynos->usb2_phy, &pdata, sizeof(pdata)); |
| 52 | if (ret) |
| 53 | goto err1; |
| 54 | |
| 55 | pdev = platform_device_alloc("nop_usb_xceiv", 1); |
| 56 | if (!pdev) { |
| 57 | ret = -ENOMEM; |
| 58 | goto err1; |
| 59 | } |
| 60 | |
| 61 | exynos->usb3_phy = pdev; |
| 62 | pdata.type = USB_PHY_TYPE_USB3; |
| 63 | |
| 64 | ret = platform_device_add_data(exynos->usb3_phy, &pdata, sizeof(pdata)); |
| 65 | if (ret) |
| 66 | goto err2; |
| 67 | |
| 68 | ret = platform_device_add(exynos->usb2_phy); |
| 69 | if (ret) |
| 70 | goto err2; |
| 71 | |
| 72 | ret = platform_device_add(exynos->usb3_phy); |
| 73 | if (ret) |
| 74 | goto err3; |
| 75 | |
| 76 | return 0; |
| 77 | |
| 78 | err3: |
| 79 | platform_device_del(exynos->usb2_phy); |
| 80 | |
| 81 | err2: |
| 82 | platform_device_put(exynos->usb3_phy); |
| 83 | |
| 84 | err1: |
| 85 | platform_device_put(exynos->usb2_phy); |
| 86 | |
| 87 | return ret; |
| 88 | } |
| 89 | |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 90 | static int __devinit dwc3_exynos_probe(struct platform_device *pdev) |
| 91 | { |
| 92 | struct dwc3_exynos_data *pdata = pdev->dev.platform_data; |
| 93 | struct platform_device *dwc3; |
| 94 | struct dwc3_exynos *exynos; |
| 95 | struct clk *clk; |
| 96 | |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 97 | int ret = -ENOMEM; |
| 98 | |
| 99 | exynos = kzalloc(sizeof(*exynos), GFP_KERNEL); |
| 100 | if (!exynos) { |
| 101 | dev_err(&pdev->dev, "not enough memory\n"); |
| 102 | goto err0; |
| 103 | } |
| 104 | |
| 105 | platform_set_drvdata(pdev, exynos); |
| 106 | |
Felipe Balbi | d720f05 | 2012-07-19 14:01:10 +0300 | [diff] [blame] | 107 | ret = dwc3_exynos_register_phys(exynos); |
| 108 | if (ret) { |
| 109 | dev_err(&pdev->dev, "couldn't register PHYs\n"); |
| 110 | goto err1; |
| 111 | } |
| 112 | |
Sebastian Andrzej Siewior | 124dafd | 2012-10-29 18:09:53 +0100 | [diff] [blame^] | 113 | dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 114 | if (!dwc3) { |
| 115 | dev_err(&pdev->dev, "couldn't allocate dwc3 device\n"); |
Sebastian Andrzej Siewior | 124dafd | 2012-10-29 18:09:53 +0100 | [diff] [blame^] | 116 | goto err1; |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | clk = clk_get(&pdev->dev, "usbdrd30"); |
| 120 | if (IS_ERR(clk)) { |
| 121 | dev_err(&pdev->dev, "couldn't get clock\n"); |
| 122 | ret = -EINVAL; |
| 123 | goto err3; |
| 124 | } |
| 125 | |
| 126 | dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask); |
| 127 | |
| 128 | dwc3->dev.parent = &pdev->dev; |
| 129 | dwc3->dev.dma_mask = pdev->dev.dma_mask; |
| 130 | dwc3->dev.dma_parms = pdev->dev.dma_parms; |
| 131 | exynos->dwc3 = dwc3; |
| 132 | exynos->dev = &pdev->dev; |
| 133 | exynos->clk = clk; |
| 134 | |
| 135 | clk_enable(exynos->clk); |
| 136 | |
| 137 | /* PHY initialization */ |
| 138 | if (!pdata) { |
| 139 | dev_dbg(&pdev->dev, "missing platform data\n"); |
| 140 | } else { |
| 141 | if (pdata->phy_init) |
| 142 | pdata->phy_init(pdev, pdata->phy_type); |
| 143 | } |
| 144 | |
| 145 | ret = platform_device_add_resources(dwc3, pdev->resource, |
| 146 | pdev->num_resources); |
| 147 | if (ret) { |
| 148 | dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n"); |
| 149 | goto err4; |
| 150 | } |
| 151 | |
| 152 | ret = platform_device_add(dwc3); |
| 153 | if (ret) { |
| 154 | dev_err(&pdev->dev, "failed to register dwc3 device\n"); |
| 155 | goto err4; |
| 156 | } |
| 157 | |
| 158 | return 0; |
| 159 | |
| 160 | err4: |
| 161 | if (pdata && pdata->phy_exit) |
| 162 | pdata->phy_exit(pdev, pdata->phy_type); |
| 163 | |
| 164 | clk_disable(clk); |
| 165 | clk_put(clk); |
| 166 | err3: |
| 167 | platform_device_put(dwc3); |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 168 | err1: |
| 169 | kfree(exynos); |
| 170 | err0: |
| 171 | return ret; |
| 172 | } |
| 173 | |
| 174 | static int __devexit dwc3_exynos_remove(struct platform_device *pdev) |
| 175 | { |
| 176 | struct dwc3_exynos *exynos = platform_get_drvdata(pdev); |
| 177 | struct dwc3_exynos_data *pdata = pdev->dev.platform_data; |
| 178 | |
| 179 | platform_device_unregister(exynos->dwc3); |
Felipe Balbi | d720f05 | 2012-07-19 14:01:10 +0300 | [diff] [blame] | 180 | platform_device_unregister(exynos->usb2_phy); |
| 181 | platform_device_unregister(exynos->usb3_phy); |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 182 | |
Anton Tikhomirov | d28a968 | 2012-02-15 17:04:56 +0900 | [diff] [blame] | 183 | if (pdata && pdata->phy_exit) |
| 184 | pdata->phy_exit(pdev, pdata->phy_type); |
| 185 | |
| 186 | clk_disable(exynos->clk); |
| 187 | clk_put(exynos->clk); |
| 188 | |
| 189 | kfree(exynos); |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | static struct platform_driver dwc3_exynos_driver = { |
| 195 | .probe = dwc3_exynos_probe, |
| 196 | .remove = __devexit_p(dwc3_exynos_remove), |
| 197 | .driver = { |
| 198 | .name = "exynos-dwc3", |
| 199 | }, |
| 200 | }; |
| 201 | |
| 202 | module_platform_driver(dwc3_exynos_driver); |
| 203 | |
| 204 | MODULE_ALIAS("platform:exynos-dwc3"); |
| 205 | MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>"); |
| 206 | MODULE_LICENSE("GPL"); |
| 207 | MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer"); |