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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
15struct ehci_sh_priv {
16 struct clk *iclk, *fclk;
17 struct usb_hcd *hcd;
18};
19
20static int ehci_sh_reset(struct usb_hcd *hcd)
21{
22 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
23 int ret;
24
25 ehci->caps = hcd->regs;
26 ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci,
27 &ehci->caps->hc_capbase));
28
29 dbg_hcs_params(ehci, "reset");
30 dbg_hcc_params(ehci, "reset");
31
32 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
33
34 ret = ehci_halt(ehci);
35 if (unlikely(ret))
36 return ret;
37
38 ret = ehci_init(hcd);
39 if (unlikely(ret))
40 return ret;
41
42 ehci->sbrn = 0x20;
43
44 ehci_reset(ehci);
45 ehci_port_power(ehci, 0);
46
47 return ret;
48}
49
50static const struct hc_driver ehci_sh_hc_driver = {
51 .description = hcd_name,
52 .product_desc = "SuperH EHCI",
53 .hcd_priv_size = sizeof(struct ehci_hcd),
54
55 /*
56 * generic hardware linkage
57 */
58 .irq = ehci_irq,
59 .flags = HCD_USB2 | HCD_MEMORY,
60
61 /*
62 * basic lifecycle operations
63 */
64 .reset = ehci_sh_reset,
65 .start = ehci_run,
66 .stop = ehci_stop,
67 .shutdown = ehci_shutdown,
68
69 /*
70 * managing i/o requests and associated device resources
71 */
72 .urb_enqueue = ehci_urb_enqueue,
73 .urb_dequeue = ehci_urb_dequeue,
74 .endpoint_disable = ehci_endpoint_disable,
75 .endpoint_reset = ehci_endpoint_reset,
76
77 /*
78 * scheduling support
79 */
80 .get_frame_number = ehci_get_frame,
81
82 /*
83 * root hub support
84 */
85 .hub_status_data = ehci_hub_status_data,
86 .hub_control = ehci_hub_control,
87
88#ifdef CONFIG_PM
89 .bus_suspend = ehci_bus_suspend,
90 .bus_resume = ehci_bus_resume,
91#endif
92
93 .relinquish_port = ehci_relinquish_port,
94 .port_handed_over = ehci_port_handed_over,
95 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
96};
97
98static int ehci_hcd_sh_probe(struct platform_device *pdev)
99{
100 const struct hc_driver *driver = &ehci_sh_hc_driver;
101 struct resource *res;
102 struct ehci_sh_priv *priv;
103 struct usb_hcd *hcd;
104 int irq, ret;
105
106 if (usb_disabled())
107 return -ENODEV;
108
109 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
110 if (!res) {
111 dev_err(&pdev->dev,
112 "Found HC with no register addr. Check %s setup!\n",
113 dev_name(&pdev->dev));
114 ret = -ENODEV;
115 goto fail_create_hcd;
116 }
117
118 irq = platform_get_irq(pdev, 0);
119 if (irq <= 0) {
120 dev_err(&pdev->dev,
121 "Found HC with no IRQ. Check %s setup!\n",
122 dev_name(&pdev->dev));
123 ret = -ENODEV;
124 goto fail_create_hcd;
125 }
126
127 /* initialize hcd */
128 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
129 dev_name(&pdev->dev));
130 if (!hcd) {
131 ret = -ENOMEM;
132 goto fail_create_hcd;
133 }
134
135 hcd->rsrc_start = res->start;
136 hcd->rsrc_len = resource_size(res);
137
138 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
139 driver->description)) {
140 dev_dbg(&pdev->dev, "controller already in use\n");
141 ret = -EBUSY;
142 goto fail_request_resource;
143 }
144
145 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
146 if (hcd->regs == NULL) {
147 dev_dbg(&pdev->dev, "error mapping memory\n");
148 ret = -ENXIO;
149 goto fail_ioremap;
150 }
151
152 priv = kmalloc(sizeof(struct ehci_sh_priv), GFP_KERNEL);
153 if (!priv) {
154 dev_dbg(&pdev->dev, "error allocating priv data\n");
155 ret = -ENOMEM;
156 goto fail_alloc;
157 }
158
159 /* These are optional, we don't care if they fail */
160 priv->fclk = clk_get(&pdev->dev, "usb_fck");
161 if (IS_ERR(priv->fclk))
162 priv->fclk = NULL;
163
164 priv->iclk = clk_get(&pdev->dev, "usb_ick");
165 if (IS_ERR(priv->iclk))
166 priv->iclk = NULL;
167
168 clk_enable(priv->fclk);
169 clk_enable(priv->iclk);
170
171 ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
172 if (ret != 0) {
173 dev_err(&pdev->dev, "Failed to add hcd");
174 goto fail_add_hcd;
175 }
176
177 priv->hcd = hcd;
178 platform_set_drvdata(pdev, priv);
179
180 return ret;
181
182fail_add_hcd:
183 clk_disable(priv->iclk);
184 clk_disable(priv->fclk);
185
186 clk_put(priv->iclk);
187 clk_put(priv->fclk);
188
189 kfree(priv);
190fail_alloc:
191 iounmap(hcd->regs);
192fail_ioremap:
193 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
194fail_request_resource:
195 usb_put_hcd(hcd);
196fail_create_hcd:
197 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
198
199 return ret;
200}
201
202static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
203{
204 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
205 struct usb_hcd *hcd = priv->hcd;
206
207 usb_remove_hcd(hcd);
208 iounmap(hcd->regs);
209 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
210 usb_put_hcd(hcd);
211 platform_set_drvdata(pdev, NULL);
212
213 clk_disable(priv->fclk);
214 clk_disable(priv->iclk);
215
216 clk_put(priv->fclk);
217 clk_put(priv->iclk);
218
219 kfree(priv);
220
221 return 0;
222}
223
224static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
225{
226 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
227 struct usb_hcd *hcd = priv->hcd;
228
229 if (hcd->driver->shutdown)
230 hcd->driver->shutdown(hcd);
231}
232
233static struct platform_driver ehci_hcd_sh_driver = {
234 .probe = ehci_hcd_sh_probe,
235 .remove = __exit_p(ehci_hcd_sh_remove),
236 .shutdown = ehci_hcd_sh_shutdown,
237 .driver = {
238 .name = "sh_ehci",
239 .owner = THIS_MODULE,
240 },
241};
242
243MODULE_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 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");