Greg Kroah-Hartman | 5fd54ac | 2017-11-03 11:28:30 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 2 | /* |
| 3 | * SuperH EHCI host controller driver |
| 4 | * |
| 5 | * Copyright (C) 2010 Paul Mundt |
| 6 | * |
| 7 | * Based on ohci-sh.c and ehci-atmel.c. |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 8 | */ |
| 9 | #include <linux/platform_device.h> |
| 10 | #include <linux/clk.h> |
| 11 | |
| 12 | struct ehci_sh_priv { |
| 13 | struct clk *iclk, *fclk; |
| 14 | struct usb_hcd *hcd; |
| 15 | }; |
| 16 | |
| 17 | static int ehci_sh_reset(struct usb_hcd *hcd) |
| 18 | { |
| 19 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 20 | |
| 21 | ehci->caps = hcd->regs; |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 22 | |
Alan Stern | c73cee7 | 2012-10-31 13:21:06 -0400 | [diff] [blame] | 23 | return ehci_setup(hcd); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 24 | } |
| 25 | |
| 26 | static const struct hc_driver ehci_sh_hc_driver = { |
| 27 | .description = hcd_name, |
| 28 | .product_desc = "SuperH EHCI", |
| 29 | .hcd_priv_size = sizeof(struct ehci_hcd), |
| 30 | |
| 31 | /* |
| 32 | * generic hardware linkage |
| 33 | */ |
| 34 | .irq = ehci_irq, |
Christoph Hellwig | 7b81cb6 | 2019-08-16 08:24:32 +0200 | [diff] [blame] | 35 | .flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH, |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 36 | |
| 37 | /* |
| 38 | * basic lifecycle operations |
| 39 | */ |
| 40 | .reset = ehci_sh_reset, |
| 41 | .start = ehci_run, |
| 42 | .stop = ehci_stop, |
| 43 | .shutdown = ehci_shutdown, |
| 44 | |
| 45 | /* |
| 46 | * managing i/o requests and associated device resources |
| 47 | */ |
| 48 | .urb_enqueue = ehci_urb_enqueue, |
| 49 | .urb_dequeue = ehci_urb_dequeue, |
| 50 | .endpoint_disable = ehci_endpoint_disable, |
Paul Mundt | 6e9d447 | 2010-11-26 16:48:31 +0900 | [diff] [blame] | 51 | .endpoint_reset = ehci_endpoint_reset, |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 52 | |
| 53 | /* |
| 54 | * scheduling support |
| 55 | */ |
| 56 | .get_frame_number = ehci_get_frame, |
| 57 | |
| 58 | /* |
| 59 | * root hub support |
| 60 | */ |
| 61 | .hub_status_data = ehci_hub_status_data, |
| 62 | .hub_control = ehci_hub_control, |
| 63 | |
| 64 | #ifdef CONFIG_PM |
| 65 | .bus_suspend = ehci_bus_suspend, |
| 66 | .bus_resume = ehci_bus_resume, |
| 67 | #endif |
| 68 | |
| 69 | .relinquish_port = ehci_relinquish_port, |
| 70 | .port_handed_over = ehci_port_handed_over, |
Paul Mundt | 6e9d447 | 2010-11-26 16:48:31 +0900 | [diff] [blame] | 71 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 72 | }; |
| 73 | |
| 74 | static int ehci_hcd_sh_probe(struct platform_device *pdev) |
| 75 | { |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 76 | struct resource *res; |
| 77 | struct ehci_sh_priv *priv; |
| 78 | struct usb_hcd *hcd; |
| 79 | int irq, ret; |
| 80 | |
| 81 | if (usb_disabled()) |
| 82 | return -ENODEV; |
| 83 | |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 84 | irq = platform_get_irq(pdev, 0); |
| 85 | if (irq <= 0) { |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 86 | ret = -ENODEV; |
| 87 | goto fail_create_hcd; |
| 88 | } |
| 89 | |
| 90 | /* initialize hcd */ |
| 91 | hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev, |
| 92 | dev_name(&pdev->dev)); |
| 93 | if (!hcd) { |
| 94 | ret = -ENOMEM; |
| 95 | goto fail_create_hcd; |
| 96 | } |
| 97 | |
Varka Bhadram | e71827f | 2014-11-04 07:51:18 +0530 | [diff] [blame] | 98 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Thierry Reding | 148e113 | 2013-01-21 11:09:22 +0100 | [diff] [blame] | 99 | hcd->regs = devm_ioremap_resource(&pdev->dev, res); |
| 100 | if (IS_ERR(hcd->regs)) { |
| 101 | ret = PTR_ERR(hcd->regs); |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 102 | goto fail_request_resource; |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 103 | } |
Varka Bhadram | e71827f | 2014-11-04 07:51:18 +0530 | [diff] [blame] | 104 | hcd->rsrc_start = res->start; |
| 105 | hcd->rsrc_len = resource_size(res); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 106 | |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 107 | priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv), |
| 108 | GFP_KERNEL); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 109 | if (!priv) { |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 110 | ret = -ENOMEM; |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 111 | goto fail_request_resource; |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 112 | } |
| 113 | |
| 114 | /* These are optional, we don't care if they fail */ |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 115 | priv->fclk = devm_clk_get(&pdev->dev, "usb_fck"); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 116 | if (IS_ERR(priv->fclk)) |
| 117 | priv->fclk = NULL; |
| 118 | |
Julia Lawall | a926e29 | 2012-07-30 16:43:42 +0200 | [diff] [blame] | 119 | priv->iclk = devm_clk_get(&pdev->dev, "usb_ick"); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 120 | if (IS_ERR(priv->iclk)) |
| 121 | priv->iclk = NULL; |
| 122 | |
| 123 | clk_enable(priv->fclk); |
| 124 | clk_enable(priv->iclk); |
| 125 | |
Yong Zhang | b5dd18d | 2011-09-07 16:10:52 +0800 | [diff] [blame] | 126 | ret = usb_add_hcd(hcd, irq, IRQF_SHARED); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 127 | if (ret != 0) { |
| 128 | dev_err(&pdev->dev, "Failed to add hcd"); |
| 129 | goto fail_add_hcd; |
| 130 | } |
Peter Chen | 3c9740a | 2013-11-05 10:46:02 +0800 | [diff] [blame] | 131 | device_wakeup_enable(hcd->self.controller); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 132 | |
| 133 | priv->hcd = hcd; |
| 134 | platform_set_drvdata(pdev, priv); |
| 135 | |
| 136 | return ret; |
| 137 | |
| 138 | fail_add_hcd: |
| 139 | clk_disable(priv->iclk); |
| 140 | clk_disable(priv->fclk); |
| 141 | |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 142 | fail_request_resource: |
| 143 | usb_put_hcd(hcd); |
| 144 | fail_create_hcd: |
| 145 | dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); |
| 146 | |
| 147 | return ret; |
| 148 | } |
| 149 | |
Dmitry Torokhov | 39d3568 | 2013-02-24 00:55:07 -0800 | [diff] [blame] | 150 | static int ehci_hcd_sh_remove(struct platform_device *pdev) |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 151 | { |
| 152 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); |
| 153 | struct usb_hcd *hcd = priv->hcd; |
| 154 | |
| 155 | usb_remove_hcd(hcd); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 156 | usb_put_hcd(hcd); |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 157 | |
| 158 | clk_disable(priv->fclk); |
| 159 | clk_disable(priv->iclk); |
| 160 | |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 161 | return 0; |
| 162 | } |
| 163 | |
Paul Mundt | c1e0774 | 2010-11-26 16:43:38 +0900 | [diff] [blame] | 164 | static void ehci_hcd_sh_shutdown(struct platform_device *pdev) |
| 165 | { |
| 166 | struct ehci_sh_priv *priv = platform_get_drvdata(pdev); |
| 167 | struct usb_hcd *hcd = priv->hcd; |
| 168 | |
| 169 | if (hcd->driver->shutdown) |
| 170 | hcd->driver->shutdown(hcd); |
| 171 | } |
| 172 | |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 173 | static struct platform_driver ehci_hcd_sh_driver = { |
| 174 | .probe = ehci_hcd_sh_probe, |
Nobuhiro Iwamatsu | 1c3a46d | 2013-03-27 15:09:03 +0900 | [diff] [blame] | 175 | .remove = ehci_hcd_sh_remove, |
Paul Mundt | c1e0774 | 2010-11-26 16:43:38 +0900 | [diff] [blame] | 176 | .shutdown = ehci_hcd_sh_shutdown, |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 177 | .driver = { |
| 178 | .name = "sh_ehci", |
Paul Mundt | 63c8455 | 2010-11-01 17:03:27 -0400 | [diff] [blame] | 179 | }, |
| 180 | }; |
| 181 | |
| 182 | MODULE_ALIAS("platform:sh_ehci"); |