| Antoine Tenart | 10a062c | 2014-11-26 13:44:36 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2014 Marvell Technology Group Ltd. |
| 3 | * |
| 4 | * Antoine Tenart <antoine.tenart@free-electrons.com> |
| 5 | * |
| 6 | * This file is licensed under the terms of the GNU General Public |
| 7 | * License version 2. This program is licensed "as is" without any |
| 8 | * warranty of any kind, whether express or implied. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/clk.h> |
| 12 | #include <linux/dma-mapping.h> |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/of.h> |
| 15 | #include <linux/phy/phy.h> |
| 16 | #include <linux/platform_device.h> |
| 17 | #include <linux/usb/chipidea.h> |
| 18 | #include <linux/usb/hcd.h> |
| 19 | #include <linux/usb/ulpi.h> |
| 20 | |
| 21 | #include "ci.h" |
| 22 | |
| 23 | struct ci_hdrc_usb2_priv { |
| 24 | struct platform_device *ci_pdev; |
| 25 | struct clk *clk; |
| 26 | }; |
| 27 | |
| 28 | static struct ci_hdrc_platform_data ci_default_pdata = { |
| 29 | .capoffset = DEF_CAPOFFSET, |
| 30 | .flags = CI_HDRC_DISABLE_STREAMING, |
| 31 | }; |
| 32 | |
| 33 | static int ci_hdrc_usb2_probe(struct platform_device *pdev) |
| 34 | { |
| 35 | struct device *dev = &pdev->dev; |
| 36 | struct ci_hdrc_usb2_priv *priv; |
| 37 | struct ci_hdrc_platform_data *ci_pdata = dev_get_platdata(dev); |
| 38 | int ret; |
| 39 | |
| 40 | if (!ci_pdata) |
| 41 | ci_pdata = &ci_default_pdata; |
| 42 | |
| 43 | priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
| 44 | if (!priv) |
| 45 | return -ENOMEM; |
| 46 | |
| 47 | priv->clk = devm_clk_get(dev, NULL); |
| 48 | if (!IS_ERR(priv->clk)) { |
| 49 | ret = clk_prepare_enable(priv->clk); |
| 50 | if (ret) { |
| 51 | dev_err(dev, "failed to enable the clock: %d\n", ret); |
| 52 | return ret; |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); |
| 57 | if (ret) |
| 58 | goto clk_err; |
| 59 | |
| 60 | ci_pdata->name = dev_name(dev); |
| 61 | |
| 62 | priv->ci_pdev = ci_hdrc_add_device(dev, pdev->resource, |
| 63 | pdev->num_resources, ci_pdata); |
| 64 | if (IS_ERR(priv->ci_pdev)) { |
| 65 | ret = PTR_ERR(priv->ci_pdev); |
| 66 | if (ret != -EPROBE_DEFER) |
| 67 | dev_err(dev, |
| 68 | "failed to register ci_hdrc platform device: %d\n", |
| 69 | ret); |
| 70 | goto clk_err; |
| 71 | } |
| 72 | |
| 73 | platform_set_drvdata(pdev, priv); |
| 74 | |
| 75 | pm_runtime_no_callbacks(dev); |
| 76 | pm_runtime_enable(dev); |
| 77 | |
| 78 | return 0; |
| 79 | |
| 80 | clk_err: |
| 81 | if (!IS_ERR(priv->clk)) |
| 82 | clk_disable_unprepare(priv->clk); |
| 83 | return ret; |
| 84 | } |
| 85 | |
| 86 | static int ci_hdrc_usb2_remove(struct platform_device *pdev) |
| 87 | { |
| 88 | struct ci_hdrc_usb2_priv *priv = platform_get_drvdata(pdev); |
| 89 | |
| 90 | pm_runtime_disable(&pdev->dev); |
| 91 | ci_hdrc_remove_device(priv->ci_pdev); |
| 92 | clk_disable_unprepare(priv->clk); |
| 93 | |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | static const struct of_device_id ci_hdrc_usb2_of_match[] = { |
| 98 | { .compatible = "chipidea,usb2" }, |
| 99 | { } |
| 100 | }; |
| 101 | MODULE_DEVICE_TABLE(of, ci_hdrc_usb2_of_match); |
| 102 | |
| 103 | static struct platform_driver ci_hdrc_usb2_driver = { |
| 104 | .probe = ci_hdrc_usb2_probe, |
| 105 | .remove = ci_hdrc_usb2_remove, |
| 106 | .driver = { |
| 107 | .name = "chipidea-usb2", |
| 108 | .owner = THIS_MODULE, |
| 109 | .of_match_table = of_match_ptr(ci_hdrc_usb2_of_match), |
| 110 | }, |
| 111 | }; |
| 112 | module_platform_driver(ci_hdrc_usb2_driver); |
| 113 | |
| 114 | MODULE_DESCRIPTION("ChipIdea HDRC USB2 binding for ci13xxx"); |
| 115 | MODULE_AUTHOR("Antoine Tenart <antoine.tenart@free-electrons.com>"); |
| 116 | MODULE_LICENSE("GPL"); |