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1/*
2 * SuperH EHCI host controller driver
3 *
4 * Copyright (C) 2010 Paul Mundt
5 *
6 * Based on ohci-sh.c and ehci-atmel.c.
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12#include <linux/platform_device.h>
13#include <linux/clk.h>
14#include <linux/platform_data/ehci-sh.h>
15
16struct ehci_sh_priv {
17 struct clk *iclk, *fclk;
18 struct usb_hcd *hcd;
19};
20
21static int ehci_sh_reset(struct usb_hcd *hcd)
22{
23 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
24
25 ehci->caps = hcd->regs;
26
27 return ehci_setup(hcd);
28}
29
30static const struct hc_driver ehci_sh_hc_driver = {
31 .description = hcd_name,
32 .product_desc = "SuperH EHCI",
33 .hcd_priv_size = sizeof(struct ehci_hcd),
34
35 /*
36 * generic hardware linkage
37 */
38 .irq = ehci_irq,
39 .flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
40
41 /*
42 * basic lifecycle operations
43 */
44 .reset = ehci_sh_reset,
45 .start = ehci_run,
46 .stop = ehci_stop,
47 .shutdown = ehci_shutdown,
48
49 /*
50 * managing i/o requests and associated device resources
51 */
52 .urb_enqueue = ehci_urb_enqueue,
53 .urb_dequeue = ehci_urb_dequeue,
54 .endpoint_disable = ehci_endpoint_disable,
55 .endpoint_reset = ehci_endpoint_reset,
56
57 /*
58 * scheduling support
59 */
60 .get_frame_number = ehci_get_frame,
61
62 /*
63 * root hub support
64 */
65 .hub_status_data = ehci_hub_status_data,
66 .hub_control = ehci_hub_control,
67
68#ifdef CONFIG_PM
69 .bus_suspend = ehci_bus_suspend,
70 .bus_resume = ehci_bus_resume,
71#endif
72
73 .relinquish_port = ehci_relinquish_port,
74 .port_handed_over = ehci_port_handed_over,
75 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
76};
77
78static int ehci_hcd_sh_probe(struct platform_device *pdev)
79{
80 struct resource *res;
81 struct ehci_sh_priv *priv;
82 struct ehci_sh_platdata *pdata;
83 struct usb_hcd *hcd;
84 int irq, ret;
85
86 if (usb_disabled())
87 return -ENODEV;
88
89 irq = platform_get_irq(pdev, 0);
90 if (irq <= 0) {
91 dev_err(&pdev->dev,
92 "Found HC with no IRQ. Check %s setup!\n",
93 dev_name(&pdev->dev));
94 ret = -ENODEV;
95 goto fail_create_hcd;
96 }
97
98 pdata = dev_get_platdata(&pdev->dev);
99
100 /* initialize hcd */
101 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
102 dev_name(&pdev->dev));
103 if (!hcd) {
104 ret = -ENOMEM;
105 goto fail_create_hcd;
106 }
107
108 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
109 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
110 if (IS_ERR(hcd->regs)) {
111 ret = PTR_ERR(hcd->regs);
112 goto fail_request_resource;
113 }
114 hcd->rsrc_start = res->start;
115 hcd->rsrc_len = resource_size(res);
116
117 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
118 GFP_KERNEL);
119 if (!priv) {
120 ret = -ENOMEM;
121 goto fail_request_resource;
122 }
123
124 /* These are optional, we don't care if they fail */
125 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
126 if (IS_ERR(priv->fclk))
127 priv->fclk = NULL;
128
129 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
130 if (IS_ERR(priv->iclk))
131 priv->iclk = NULL;
132
133 clk_enable(priv->fclk);
134 clk_enable(priv->iclk);
135
136 if (pdata && pdata->phy_init)
137 pdata->phy_init();
138
139 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
140 if (ret != 0) {
141 dev_err(&pdev->dev, "Failed to add hcd");
142 goto fail_add_hcd;
143 }
144 device_wakeup_enable(hcd->self.controller);
145
146 priv->hcd = hcd;
147 platform_set_drvdata(pdev, priv);
148
149 return ret;
150
151fail_add_hcd:
152 clk_disable(priv->iclk);
153 clk_disable(priv->fclk);
154
155fail_request_resource:
156 usb_put_hcd(hcd);
157fail_create_hcd:
158 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
159
160 return ret;
161}
162
163static int ehci_hcd_sh_remove(struct platform_device *pdev)
164{
165 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
166 struct usb_hcd *hcd = priv->hcd;
167
168 usb_remove_hcd(hcd);
169 usb_put_hcd(hcd);
170
171 clk_disable(priv->fclk);
172 clk_disable(priv->iclk);
173
174 return 0;
175}
176
177static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
178{
179 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
180 struct usb_hcd *hcd = priv->hcd;
181
182 if (hcd->driver->shutdown)
183 hcd->driver->shutdown(hcd);
184}
185
186static struct platform_driver ehci_hcd_sh_driver = {
187 .probe = ehci_hcd_sh_probe,
188 .remove = ehci_hcd_sh_remove,
189 .shutdown = ehci_hcd_sh_shutdown,
190 .driver = {
191 .name = "sh_ehci",
192 },
193};
194
195MODULE_ALIAS("platform:sh_ehci");
1/*
2 * SuperH EHCI host controller driver
3 *
4 * Copyright (C) 2010 Paul Mundt
5 *
6 * Based on ohci-sh.c and ehci-atmel.c.
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License. See the file "COPYING" in the main directory of this archive
10 * for more details.
11 */
12#include <linux/platform_device.h>
13#include <linux/clk.h>
14#include <linux/platform_data/ehci-sh.h>
15
16struct ehci_sh_priv {
17 struct clk *iclk, *fclk;
18 struct usb_hcd *hcd;
19};
20
21static int ehci_sh_reset(struct usb_hcd *hcd)
22{
23 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
24
25 ehci->caps = hcd->regs;
26
27 return ehci_setup(hcd);
28}
29
30static const struct hc_driver ehci_sh_hc_driver = {
31 .description = hcd_name,
32 .product_desc = "SuperH EHCI",
33 .hcd_priv_size = sizeof(struct ehci_hcd),
34
35 /*
36 * generic hardware linkage
37 */
38 .irq = ehci_irq,
39 .flags = HCD_USB2 | HCD_MEMORY | HCD_BH,
40
41 /*
42 * basic lifecycle operations
43 */
44 .reset = ehci_sh_reset,
45 .start = ehci_run,
46 .stop = ehci_stop,
47 .shutdown = ehci_shutdown,
48
49 /*
50 * managing i/o requests and associated device resources
51 */
52 .urb_enqueue = ehci_urb_enqueue,
53 .urb_dequeue = ehci_urb_dequeue,
54 .endpoint_disable = ehci_endpoint_disable,
55 .endpoint_reset = ehci_endpoint_reset,
56
57 /*
58 * scheduling support
59 */
60 .get_frame_number = ehci_get_frame,
61
62 /*
63 * root hub support
64 */
65 .hub_status_data = ehci_hub_status_data,
66 .hub_control = ehci_hub_control,
67
68#ifdef CONFIG_PM
69 .bus_suspend = ehci_bus_suspend,
70 .bus_resume = ehci_bus_resume,
71#endif
72
73 .relinquish_port = ehci_relinquish_port,
74 .port_handed_over = ehci_port_handed_over,
75 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
76};
77
78static int ehci_hcd_sh_probe(struct platform_device *pdev)
79{
80 struct resource *res;
81 struct ehci_sh_priv *priv;
82 struct ehci_sh_platdata *pdata;
83 struct usb_hcd *hcd;
84 int irq, ret;
85
86 if (usb_disabled())
87 return -ENODEV;
88
89 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
90 if (!res) {
91 dev_err(&pdev->dev,
92 "Found HC with no register addr. Check %s setup!\n",
93 dev_name(&pdev->dev));
94 ret = -ENODEV;
95 goto fail_create_hcd;
96 }
97
98 irq = platform_get_irq(pdev, 0);
99 if (irq <= 0) {
100 dev_err(&pdev->dev,
101 "Found HC with no IRQ. Check %s setup!\n",
102 dev_name(&pdev->dev));
103 ret = -ENODEV;
104 goto fail_create_hcd;
105 }
106
107 pdata = dev_get_platdata(&pdev->dev);
108
109 /* initialize hcd */
110 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
111 dev_name(&pdev->dev));
112 if (!hcd) {
113 ret = -ENOMEM;
114 goto fail_create_hcd;
115 }
116
117 hcd->rsrc_start = res->start;
118 hcd->rsrc_len = resource_size(res);
119
120 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
121 if (IS_ERR(hcd->regs)) {
122 ret = PTR_ERR(hcd->regs);
123 goto fail_request_resource;
124 }
125
126 priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv),
127 GFP_KERNEL);
128 if (!priv) {
129 dev_dbg(&pdev->dev, "error allocating priv data\n");
130 ret = -ENOMEM;
131 goto fail_request_resource;
132 }
133
134 /* These are optional, we don't care if they fail */
135 priv->fclk = devm_clk_get(&pdev->dev, "usb_fck");
136 if (IS_ERR(priv->fclk))
137 priv->fclk = NULL;
138
139 priv->iclk = devm_clk_get(&pdev->dev, "usb_ick");
140 if (IS_ERR(priv->iclk))
141 priv->iclk = NULL;
142
143 clk_enable(priv->fclk);
144 clk_enable(priv->iclk);
145
146 if (pdata && pdata->phy_init)
147 pdata->phy_init();
148
149 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
150 if (ret != 0) {
151 dev_err(&pdev->dev, "Failed to add hcd");
152 goto fail_add_hcd;
153 }
154 device_wakeup_enable(hcd->self.controller);
155
156 priv->hcd = hcd;
157 platform_set_drvdata(pdev, priv);
158
159 return ret;
160
161fail_add_hcd:
162 clk_disable(priv->iclk);
163 clk_disable(priv->fclk);
164
165fail_request_resource:
166 usb_put_hcd(hcd);
167fail_create_hcd:
168 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
169
170 return ret;
171}
172
173static int ehci_hcd_sh_remove(struct platform_device *pdev)
174{
175 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
176 struct usb_hcd *hcd = priv->hcd;
177
178 usb_remove_hcd(hcd);
179 usb_put_hcd(hcd);
180
181 clk_disable(priv->fclk);
182 clk_disable(priv->iclk);
183
184 return 0;
185}
186
187static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
188{
189 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
190 struct usb_hcd *hcd = priv->hcd;
191
192 if (hcd->driver->shutdown)
193 hcd->driver->shutdown(hcd);
194}
195
196static struct platform_driver ehci_hcd_sh_driver = {
197 .probe = ehci_hcd_sh_probe,
198 .remove = ehci_hcd_sh_remove,
199 .shutdown = ehci_hcd_sh_shutdown,
200 .driver = {
201 .name = "sh_ehci",
202 .owner = THIS_MODULE,
203 },
204};
205
206MODULE_ALIAS("platform:sh_ehci");