blob: d31d9506e41ab0844cf04f5bbe1485972f8f62a4 [file] [log] [blame]
Greg Kroah-Hartman5fd54ac2017-11-03 11:28:30 +01001// SPDX-License-Identifier: GPL-2.0
Paul Mundt63c84552010-11-01 17:03:27 -04002/*
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 Mundt63c84552010-11-01 17:03:27 -04008 */
9#include <linux/platform_device.h>
10#include <linux/clk.h>
11
12struct ehci_sh_priv {
13 struct clk *iclk, *fclk;
14 struct usb_hcd *hcd;
15};
16
17static int ehci_sh_reset(struct usb_hcd *hcd)
18{
19 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
Paul Mundt63c84552010-11-01 17:03:27 -040020
21 ehci->caps = hcd->regs;
Paul Mundt63c84552010-11-01 17:03:27 -040022
Alan Sternc73cee72012-10-31 13:21:06 -040023 return ehci_setup(hcd);
Paul Mundt63c84552010-11-01 17:03:27 -040024}
25
26static 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 Hellwig7b81cb62019-08-16 08:24:32 +020035 .flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH,
Paul Mundt63c84552010-11-01 17:03:27 -040036
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 Mundt6e9d4472010-11-26 16:48:31 +090051 .endpoint_reset = ehci_endpoint_reset,
Paul Mundt63c84552010-11-01 17:03:27 -040052
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 Mundt6e9d4472010-11-26 16:48:31 +090071 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
Paul Mundt63c84552010-11-01 17:03:27 -040072};
73
74static int ehci_hcd_sh_probe(struct platform_device *pdev)
75{
Paul Mundt63c84552010-11-01 17:03:27 -040076 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 Mundt63c84552010-11-01 17:03:27 -040084 irq = platform_get_irq(pdev, 0);
Ruan Jinjief2e58122023-08-02 11:12:36 +080085 if (irq < 0) {
86 ret = irq;
Paul Mundt63c84552010-11-01 17:03:27 -040087 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
Yangtao Li888765e2023-07-26 19:38:02 +080098 hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
Thierry Reding148e1132013-01-21 11:09:22 +010099 if (IS_ERR(hcd->regs)) {
100 ret = PTR_ERR(hcd->regs);
Julia Lawalla926e292012-07-30 16:43:42 +0200101 goto fail_request_resource;
Paul Mundt63c84552010-11-01 17:03:27 -0400102 }
Varka Bhadrame71827f2014-11-04 07:51:18 +0530103 hcd->rsrc_start = res->start;
104 hcd->rsrc_len = resource_size(res);
Paul Mundt63c84552010-11-01 17:03:27 -0400105
Julia Lawalla926e292012-07-30 16:43:42 +0200106 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
107 GFP_KERNEL);
Paul Mundt63c84552010-11-01 17:03:27 -0400108 if (!priv) {
Paul Mundt63c84552010-11-01 17:03:27 -0400109 ret = -ENOMEM;
Julia Lawalla926e292012-07-30 16:43:42 +0200110 goto fail_request_resource;
Paul Mundt63c84552010-11-01 17:03:27 -0400111 }
112
113 /* These are optional, we don't care if they fail */
Julia Lawalla926e292012-07-30 16:43:42 +0200114 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
Paul Mundt63c84552010-11-01 17:03:27 -0400115 if (IS_ERR(priv->fclk))
116 priv->fclk = NULL;
117
Julia Lawalla926e292012-07-30 16:43:42 +0200118 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
Paul Mundt63c84552010-11-01 17:03:27 -0400119 if (IS_ERR(priv->iclk))
120 priv->iclk = NULL;
121
122 clk_enable(priv->fclk);
123 clk_enable(priv->iclk);
124
Yong Zhangb5dd18d2011-09-07 16:10:52 +0800125 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
Paul Mundt63c84552010-11-01 17:03:27 -0400126 if (ret != 0) {
127 dev_err(&pdev->dev, "Failed to add hcd");
128 goto fail_add_hcd;
129 }
Peter Chen3c9740a2013-11-05 10:46:02 +0800130 device_wakeup_enable(hcd->self.controller);
Paul Mundt63c84552010-11-01 17:03:27 -0400131
132 priv->hcd = hcd;
133 platform_set_drvdata(pdev, priv);
134
135 return ret;
136
137fail_add_hcd:
138 clk_disable(priv->iclk);
139 clk_disable(priv->fclk);
140
Paul Mundt63c84552010-11-01 17:03:27 -0400141fail_request_resource:
142 usb_put_hcd(hcd);
143fail_create_hcd:
144 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
145
146 return ret;
147}
148
Uwe Kleine-Königa9a49022023-05-18 01:01:58 +0200149static void ehci_hcd_sh_remove(struct platform_device *pdev)
Paul Mundt63c84552010-11-01 17:03:27 -0400150{
151 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
152 struct usb_hcd *hcd = priv->hcd;
153
154 usb_remove_hcd(hcd);
Paul Mundt63c84552010-11-01 17:03:27 -0400155 usb_put_hcd(hcd);
Paul Mundt63c84552010-11-01 17:03:27 -0400156
157 clk_disable(priv->fclk);
158 clk_disable(priv->iclk);
Paul Mundt63c84552010-11-01 17:03:27 -0400159}
160
Paul Mundtc1e07742010-11-26 16:43:38 +0900161static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
162{
163 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
164 struct usb_hcd *hcd = priv->hcd;
165
166 if (hcd->driver->shutdown)
167 hcd->driver->shutdown(hcd);
168}
169
Paul Mundt63c84552010-11-01 17:03:27 -0400170static struct platform_driver ehci_hcd_sh_driver = {
171 .probe = ehci_hcd_sh_probe,
Uwe Kleine-Königa9a49022023-05-18 01:01:58 +0200172 .remove_new = ehci_hcd_sh_remove,
Paul Mundtc1e07742010-11-26 16:43:38 +0900173 .shutdown = ehci_hcd_sh_shutdown,
Paul Mundt63c84552010-11-01 17:03:27 -0400174 .driver = {
175 .name = "sh_ehci",
Paul Mundt63c84552010-11-01 17:03:27 -0400176 },
177};
178
179MODULE_ALIAS("platform:sh_ehci");