Loading...
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 int ret;
25
26 ehci->caps = hcd->regs;
27 ehci->regs = hcd->regs + HC_LENGTH(ehci, ehci_readl(ehci,
28 &ehci->caps->hc_capbase));
29
30 dbg_hcs_params(ehci, "reset");
31 dbg_hcc_params(ehci, "reset");
32
33 ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
34
35 ret = ehci_halt(ehci);
36 if (unlikely(ret))
37 return ret;
38
39 ret = ehci_init(hcd);
40 if (unlikely(ret))
41 return ret;
42
43 ehci->sbrn = 0x20;
44
45 ehci_reset(ehci);
46 ehci_port_power(ehci, 0);
47
48 return ret;
49}
50
51static const struct hc_driver ehci_sh_hc_driver = {
52 .description = hcd_name,
53 .product_desc = "SuperH EHCI",
54 .hcd_priv_size = sizeof(struct ehci_hcd),
55
56 /*
57 * generic hardware linkage
58 */
59 .irq = ehci_irq,
60 .flags = HCD_USB2 | HCD_MEMORY,
61
62 /*
63 * basic lifecycle operations
64 */
65 .reset = ehci_sh_reset,
66 .start = ehci_run,
67 .stop = ehci_stop,
68 .shutdown = ehci_shutdown,
69
70 /*
71 * managing i/o requests and associated device resources
72 */
73 .urb_enqueue = ehci_urb_enqueue,
74 .urb_dequeue = ehci_urb_dequeue,
75 .endpoint_disable = ehci_endpoint_disable,
76 .endpoint_reset = ehci_endpoint_reset,
77
78 /*
79 * scheduling support
80 */
81 .get_frame_number = ehci_get_frame,
82
83 /*
84 * root hub support
85 */
86 .hub_status_data = ehci_hub_status_data,
87 .hub_control = ehci_hub_control,
88
89#ifdef CONFIG_PM
90 .bus_suspend = ehci_bus_suspend,
91 .bus_resume = ehci_bus_resume,
92#endif
93
94 .relinquish_port = ehci_relinquish_port,
95 .port_handed_over = ehci_port_handed_over,
96 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
97};
98
99static int ehci_hcd_sh_probe(struct platform_device *pdev)
100{
101 const struct hc_driver *driver = &ehci_sh_hc_driver;
102 struct resource *res;
103 struct ehci_sh_priv *priv;
104 struct ehci_sh_platdata *pdata;
105 struct usb_hcd *hcd;
106 int irq, ret;
107
108 if (usb_disabled())
109 return -ENODEV;
110
111 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
112 if (!res) {
113 dev_err(&pdev->dev,
114 "Found HC with no register addr. Check %s setup!\n",
115 dev_name(&pdev->dev));
116 ret = -ENODEV;
117 goto fail_create_hcd;
118 }
119
120 irq = platform_get_irq(pdev, 0);
121 if (irq <= 0) {
122 dev_err(&pdev->dev,
123 "Found HC with no IRQ. Check %s setup!\n",
124 dev_name(&pdev->dev));
125 ret = -ENODEV;
126 goto fail_create_hcd;
127 }
128
129 pdata = pdev->dev.platform_data;
130
131 /* initialize hcd */
132 hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev,
133 dev_name(&pdev->dev));
134 if (!hcd) {
135 ret = -ENOMEM;
136 goto fail_create_hcd;
137 }
138
139 hcd->rsrc_start = res->start;
140 hcd->rsrc_len = resource_size(res);
141
142 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
143 driver->description)) {
144 dev_dbg(&pdev->dev, "controller already in use\n");
145 ret = -EBUSY;
146 goto fail_request_resource;
147 }
148
149 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
150 if (hcd->regs == NULL) {
151 dev_dbg(&pdev->dev, "error mapping memory\n");
152 ret = -ENXIO;
153 goto fail_ioremap;
154 }
155
156 priv = kmalloc(sizeof(struct ehci_sh_priv), GFP_KERNEL);
157 if (!priv) {
158 dev_dbg(&pdev->dev, "error allocating priv data\n");
159 ret = -ENOMEM;
160 goto fail_alloc;
161 }
162
163 /* These are optional, we don't care if they fail */
164 priv->fclk = clk_get(&pdev->dev, "usb_fck");
165 if (IS_ERR(priv->fclk))
166 priv->fclk = NULL;
167
168 priv->iclk = clk_get(&pdev->dev, "usb_ick");
169 if (IS_ERR(priv->iclk))
170 priv->iclk = NULL;
171
172 clk_enable(priv->fclk);
173 clk_enable(priv->iclk);
174
175 if (pdata && pdata->phy_init)
176 pdata->phy_init();
177
178 ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
179 if (ret != 0) {
180 dev_err(&pdev->dev, "Failed to add hcd");
181 goto fail_add_hcd;
182 }
183
184 priv->hcd = hcd;
185 platform_set_drvdata(pdev, priv);
186
187 return ret;
188
189fail_add_hcd:
190 clk_disable(priv->iclk);
191 clk_disable(priv->fclk);
192
193 clk_put(priv->iclk);
194 clk_put(priv->fclk);
195
196 kfree(priv);
197fail_alloc:
198 iounmap(hcd->regs);
199fail_ioremap:
200 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
201fail_request_resource:
202 usb_put_hcd(hcd);
203fail_create_hcd:
204 dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret);
205
206 return ret;
207}
208
209static int __exit ehci_hcd_sh_remove(struct platform_device *pdev)
210{
211 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
212 struct usb_hcd *hcd = priv->hcd;
213
214 usb_remove_hcd(hcd);
215 iounmap(hcd->regs);
216 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
217 usb_put_hcd(hcd);
218 platform_set_drvdata(pdev, NULL);
219
220 clk_disable(priv->fclk);
221 clk_disable(priv->iclk);
222
223 clk_put(priv->fclk);
224 clk_put(priv->iclk);
225
226 kfree(priv);
227
228 return 0;
229}
230
231static void ehci_hcd_sh_shutdown(struct platform_device *pdev)
232{
233 struct ehci_sh_priv *priv = platform_get_drvdata(pdev);
234 struct usb_hcd *hcd = priv->hcd;
235
236 if (hcd->driver->shutdown)
237 hcd->driver->shutdown(hcd);
238}
239
240static struct platform_driver ehci_hcd_sh_driver = {
241 .probe = ehci_hcd_sh_probe,
242 .remove = __exit_p(ehci_hcd_sh_remove),
243 .shutdown = ehci_hcd_sh_shutdown,
244 .driver = {
245 .name = "sh_ehci",
246 .owner = THIS_MODULE,
247 },
248};
249
250MODULE_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");