projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d28a9689 AT |
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> | |
| d28a9689 AT |
21 | #include <linux/clk.h> |
| 22 | ||
| 23 | #include "core.h" | |
| 24 | ||
| 25 | struct dwc3_exynos { | |
| 26 | struct platform_device *dwc3; | |
| 27 | struct device *dev; | |
| 28 | ||
| 29 | struct clk *clk; | |
| 30 | }; | |
| 31 | ||
| 32 | static int __devinit dwc3_exynos_probe(struct platform_device *pdev) | |
| 33 | { | |
| 34 | struct dwc3_exynos_data *pdata = pdev->dev.platform_data; | |
| 35 | struct platform_device *dwc3; | |
| 36 | struct dwc3_exynos *exynos; | |
| 37 | struct clk *clk; | |
| 38 | ||
| 39 | int devid; | |
| 40 | int ret = -ENOMEM; | |
| 41 | ||
| 42 | exynos = kzalloc(sizeof(*exynos), GFP_KERNEL); | |
| 43 | if (!exynos) { | |
| 44 | dev_err(&pdev->dev, "not enough memory\n"); | |
| 45 | goto err0; | |
| 46 | } | |
| 47 | ||
| 48 | platform_set_drvdata(pdev, exynos); | |
| 49 | ||
| 50 | devid = dwc3_get_device_id(); | |
| 51 | if (devid < 0) | |
| 52 | goto err1; | |
| 53 | ||
| 54 | dwc3 = platform_device_alloc("dwc3", devid); | |
| 55 | if (!dwc3) { | |
| 56 | dev_err(&pdev->dev, "couldn't allocate dwc3 device\n"); | |
| 57 | goto err2; | |
| 58 | } | |
| 59 | ||
| 60 | clk = clk_get(&pdev->dev, "usbdrd30"); | |
| 61 | if (IS_ERR(clk)) { | |
| 62 | dev_err(&pdev->dev, "couldn't get clock\n"); | |
| 63 | ret = -EINVAL; | |
| 64 | goto err3; | |
| 65 | } | |
| 66 | ||
| 67 | dma_set_coherent_mask(&dwc3->dev, pdev->dev.coherent_dma_mask); | |
| 68 | ||
| 69 | dwc3->dev.parent = &pdev->dev; | |
| 70 | dwc3->dev.dma_mask = pdev->dev.dma_mask; | |
| 71 | dwc3->dev.dma_parms = pdev->dev.dma_parms; | |
| 72 | exynos->dwc3 = dwc3; | |
| 73 | exynos->dev = &pdev->dev; | |
| 74 | exynos->clk = clk; | |
| 75 | ||
| 76 | clk_enable(exynos->clk); | |
| 77 | ||
| 78 | /* PHY initialization */ | |
| 79 | if (!pdata) { | |
| 80 | dev_dbg(&pdev->dev, "missing platform data\n"); | |
| 81 | } else { | |
| 82 | if (pdata->phy_init) | |
| 83 | pdata->phy_init(pdev, pdata->phy_type); | |
| 84 | } | |
| 85 | ||
| 86 | ret = platform_device_add_resources(dwc3, pdev->resource, | |
| 87 | pdev->num_resources); | |
| 88 | if (ret) { | |
| 89 | dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n"); | |
| 90 | goto err4; | |
| 91 | } | |
| 92 | ||
| 93 | ret = platform_device_add(dwc3); | |
| 94 | if (ret) { | |
| 95 | dev_err(&pdev->dev, "failed to register dwc3 device\n"); | |
| 96 | goto err4; | |
| 97 | } | |
| 98 | ||
| 99 | return 0; | |
| 100 | ||
| 101 | err4: | |
| 102 | if (pdata && pdata->phy_exit) | |
| 103 | pdata->phy_exit(pdev, pdata->phy_type); | |
| 104 | ||
| 105 | clk_disable(clk); | |
| 106 | clk_put(clk); | |
| 107 | err3: | |
| 108 | platform_device_put(dwc3); | |
| 109 | err2: | |
| 110 | dwc3_put_device_id(devid); | |
| 111 | err1: | |
| 112 | kfree(exynos); | |
| 113 | err0: | |
| 114 | return ret; | |
| 115 | } | |
| 116 | ||
| 117 | static int __devexit dwc3_exynos_remove(struct platform_device *pdev) | |
| 118 | { | |
| 119 | struct dwc3_exynos *exynos = platform_get_drvdata(pdev); | |
| 120 | struct dwc3_exynos_data *pdata = pdev->dev.platform_data; | |
| 121 | ||
| 122 | platform_device_unregister(exynos->dwc3); | |
| 123 | ||
| 124 | dwc3_put_device_id(exynos->dwc3->id); | |
| 125 | ||
| 126 | if (pdata && pdata->phy_exit) | |
| 127 | pdata->phy_exit(pdev, pdata->phy_type); | |
| 128 | ||
| 129 | clk_disable(exynos->clk); | |
| 130 | clk_put(exynos->clk); | |
| 131 | ||
| 132 | kfree(exynos); | |
| 133 | ||
| 134 | return 0; | |
| 135 | } | |
| 136 | ||
| 137 | static struct platform_driver dwc3_exynos_driver = { | |
| 138 | .probe = dwc3_exynos_probe, | |
| 139 | .remove = __devexit_p(dwc3_exynos_remove), | |
| 140 | .driver = { | |
| 141 | .name = "exynos-dwc3", | |
| 142 | }, | |
| 143 | }; | |
| 144 | ||
| 145 | module_platform_driver(dwc3_exynos_driver); | |
| 146 | ||
| 147 | MODULE_ALIAS("platform:exynos-dwc3"); | |
| 148 | MODULE_AUTHOR("Anton Tikhomirov <av.tikhomirov@samsung.com>"); | |
| 149 | MODULE_LICENSE("GPL"); | |
| 150 | MODULE_DESCRIPTION("DesignWare USB3 EXYNOS Glue Layer"); |