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1// SPDX-License-Identifier: GPL-2.0
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.
8 */
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);
20
21 ehci->caps = hcd->regs;
22
23 return ehci_setup(hcd);
24}
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,
35 .flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH,
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,
51 .endpoint_reset = ehci_endpoint_reset,
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,
71 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
72};
73
74static int ehci_hcd_sh_probe(struct platform_device *pdev)
75{
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
84 irq = platform_get_irq(pdev, 0);
85 if (irq < 0) {
86 ret = irq;
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
98 hcd->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
99 if (IS_ERR(hcd->regs)) {
100 ret = PTR_ERR(hcd->regs);
101 goto fail_request_resource;
102 }
103 hcd->rsrc_start = res->start;
104 hcd->rsrc_len = resource_size(res);
105
106 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
107 GFP_KERNEL);
108 if (!priv) {
109 ret = -ENOMEM;
110 goto fail_request_resource;
111 }
112
113 /* These are optional, we don't care if they fail */
114 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
115 if (IS_ERR(priv->fclk))
116 priv->fclk = NULL;
117
118 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
119 if (IS_ERR(priv->iclk))
120 priv->iclk = NULL;
121
122 clk_enable(priv->fclk);
123 clk_enable(priv->iclk);
124
125 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
126 if (ret != 0) {
127 dev_err(&pdev->dev, "Failed to add hcd");
128 goto fail_add_hcd;
129 }
130 device_wakeup_enable(hcd->self.controller);
131
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
141fail_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
149static void ehci_hcd_sh_remove(struct platform_device *pdev)
150{
151 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
152 struct usb_hcd *hcd = priv->hcd;
153
154 usb_remove_hcd(hcd);
155 usb_put_hcd(hcd);
156
157 clk_disable(priv->fclk);
158 clk_disable(priv->iclk);
159}
160
161static 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
170static struct platform_driver ehci_hcd_sh_driver = {
171 .probe = ehci_hcd_sh_probe,
172 .remove_new = ehci_hcd_sh_remove,
173 .shutdown = ehci_hcd_sh_shutdown,
174 .driver = {
175 .name = "sh_ehci",
176 },
177};
178
179MODULE_ALIAS("platform:sh_ehci");
1// SPDX-License-Identifier: GPL-2.0
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.
8 */
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);
20
21 ehci->caps = hcd->regs;
22
23 return ehci_setup(hcd);
24}
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,
35 .flags = HCD_USB2 | HCD_DMA | HCD_MEMORY | HCD_BH,
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,
51 .endpoint_reset = ehci_endpoint_reset,
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,
71 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
72};
73
74static int ehci_hcd_sh_probe(struct platform_device *pdev)
75{
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
84 irq = platform_get_irq(pdev, 0);
85 if (irq <= 0) {
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
98 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
99 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
100 if (IS_ERR(hcd->regs)) {
101 ret = PTR_ERR(hcd->regs);
102 goto fail_request_resource;
103 }
104 hcd->rsrc_start = res->start;
105 hcd->rsrc_len = resource_size(res);
106
107 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
108 GFP_KERNEL);
109 if (!priv) {
110 ret = -ENOMEM;
111 goto fail_request_resource;
112 }
113
114 /* These are optional, we don't care if they fail */
115 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
116 if (IS_ERR(priv->fclk))
117 priv->fclk = NULL;
118
119 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
120 if (IS_ERR(priv->iclk))
121 priv->iclk = NULL;
122
123 clk_enable(priv->fclk);
124 clk_enable(priv->iclk);
125
126 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
127 if (ret != 0) {
128 dev_err(&pdev->dev, "Failed to add hcd");
129 goto fail_add_hcd;
130 }
131 device_wakeup_enable(hcd->self.controller);
132
133 priv->hcd = hcd;
134 platform_set_drvdata(pdev, priv);
135
136 return ret;
137
138fail_add_hcd:
139 clk_disable(priv->iclk);
140 clk_disable(priv->fclk);
141
142fail_request_resource:
143 usb_put_hcd(hcd);
144fail_create_hcd:
145 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
146
147 return ret;
148}
149
150static int ehci_hcd_sh_remove(struct platform_device *pdev)
151{
152 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
153 struct usb_hcd *hcd = priv->hcd;
154
155 usb_remove_hcd(hcd);
156 usb_put_hcd(hcd);
157
158 clk_disable(priv->fclk);
159 clk_disable(priv->iclk);
160
161 return 0;
162}
163
164static 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
173static struct platform_driver ehci_hcd_sh_driver = {
174 .probe = ehci_hcd_sh_probe,
175 .remove = ehci_hcd_sh_remove,
176 .shutdown = ehci_hcd_sh_shutdown,
177 .driver = {
178 .name = "sh_ehci",
179 },
180};
181
182MODULE_ALIAS("platform:sh_ehci");