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1/*
2* OHCI HCD (Host Controller Driver) for USB.
3*
4* Copyright (C) 2010 ST Microelectronics.
5* Deepak Sikri<deepak.sikri@st.com>
6*
7* Based on various ohci-*.c drivers
8*
9* This file is licensed under the terms of the GNU General Public
10* License version 2. This program is licensed "as is" without any
11* warranty of any kind, whether express or implied.
12*/
13
14#include <linux/signal.h>
15#include <linux/platform_device.h>
16#include <linux/clk.h>
17
18struct spear_ohci {
19 struct ohci_hcd ohci;
20 struct clk *clk;
21};
22
23#define to_spear_ohci(hcd) (struct spear_ohci *)hcd_to_ohci(hcd)
24
25static void spear_start_ohci(struct spear_ohci *ohci)
26{
27 clk_enable(ohci->clk);
28}
29
30static void spear_stop_ohci(struct spear_ohci *ohci)
31{
32 clk_disable(ohci->clk);
33}
34
35static int __devinit ohci_spear_start(struct usb_hcd *hcd)
36{
37 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
38 int ret;
39
40 ret = ohci_init(ohci);
41 if (ret < 0)
42 return ret;
43 ohci->regs = hcd->regs;
44
45 ret = ohci_run(ohci);
46 if (ret < 0) {
47 dev_err(hcd->self.controller, "can't start\n");
48 ohci_stop(hcd);
49 return ret;
50 }
51
52 create_debug_files(ohci);
53
54#ifdef DEBUG
55 ohci_dump(ohci, 1);
56#endif
57 return 0;
58}
59
60static const struct hc_driver ohci_spear_hc_driver = {
61 .description = hcd_name,
62 .product_desc = "SPEAr OHCI",
63 .hcd_priv_size = sizeof(struct spear_ohci),
64
65 /* generic hardware linkage */
66 .irq = ohci_irq,
67 .flags = HCD_USB11 | HCD_MEMORY,
68
69 /* basic lifecycle operations */
70 .start = ohci_spear_start,
71 .stop = ohci_stop,
72 .shutdown = ohci_shutdown,
73#ifdef CONFIG_PM
74 .bus_suspend = ohci_bus_suspend,
75 .bus_resume = ohci_bus_resume,
76#endif
77
78 /* managing i/o requests and associated device resources */
79 .urb_enqueue = ohci_urb_enqueue,
80 .urb_dequeue = ohci_urb_dequeue,
81 .endpoint_disable = ohci_endpoint_disable,
82
83 /* scheduling support */
84 .get_frame_number = ohci_get_frame,
85
86 /* root hub support */
87 .hub_status_data = ohci_hub_status_data,
88 .hub_control = ohci_hub_control,
89
90 .start_port_reset = ohci_start_port_reset,
91};
92
93static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
94{
95 const struct hc_driver *driver = &ohci_spear_hc_driver;
96 struct usb_hcd *hcd = NULL;
97 struct clk *usbh_clk;
98 struct spear_ohci *ohci_p;
99 struct resource *res;
100 int retval, irq;
101 int *pdata = pdev->dev.platform_data;
102 char clk_name[20] = "usbh_clk";
103
104 if (pdata == NULL)
105 return -EFAULT;
106
107 irq = platform_get_irq(pdev, 0);
108 if (irq < 0) {
109 retval = irq;
110 goto fail_irq_get;
111 }
112
113 if (*pdata >= 0)
114 sprintf(clk_name, "usbh.%01d_clk", *pdata);
115
116 usbh_clk = clk_get(NULL, clk_name);
117 if (IS_ERR(usbh_clk)) {
118 dev_err(&pdev->dev, "Error getting interface clock\n");
119 retval = PTR_ERR(usbh_clk);
120 goto fail_get_usbh_clk;
121 }
122
123 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
124 if (!hcd) {
125 retval = -ENOMEM;
126 goto fail_create_hcd;
127 }
128
129 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
130 if (!res) {
131 retval = -ENODEV;
132 goto fail_request_resource;
133 }
134
135 hcd->rsrc_start = pdev->resource[0].start;
136 hcd->rsrc_len = resource_size(res);
137 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
138 dev_dbg(&pdev->dev, "request_mem_region failed\n");
139 retval = -EBUSY;
140 goto fail_request_resource;
141 }
142
143 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
144 if (!hcd->regs) {
145 dev_dbg(&pdev->dev, "ioremap failed\n");
146 retval = -ENOMEM;
147 goto fail_ioremap;
148 }
149
150 ohci_p = (struct spear_ohci *)hcd_to_ohci(hcd);
151 ohci_p->clk = usbh_clk;
152 spear_start_ohci(ohci_p);
153 ohci_hcd_init(hcd_to_ohci(hcd));
154
155 retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), IRQF_DISABLED);
156 if (retval == 0)
157 return retval;
158
159 spear_stop_ohci(ohci_p);
160 iounmap(hcd->regs);
161fail_ioremap:
162 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
163fail_request_resource:
164 usb_put_hcd(hcd);
165fail_create_hcd:
166 clk_put(usbh_clk);
167fail_get_usbh_clk:
168fail_irq_get:
169 dev_err(&pdev->dev, "init fail, %d\n", retval);
170
171 return retval;
172}
173
174static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
175{
176 struct usb_hcd *hcd = platform_get_drvdata(pdev);
177 struct spear_ohci *ohci_p = to_spear_ohci(hcd);
178
179 usb_remove_hcd(hcd);
180 if (ohci_p->clk)
181 spear_stop_ohci(ohci_p);
182
183 iounmap(hcd->regs);
184 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
185 usb_put_hcd(hcd);
186
187 if (ohci_p->clk)
188 clk_put(ohci_p->clk);
189 platform_set_drvdata(pdev, NULL);
190 return 0;
191}
192
193#if defined(CONFIG_PM)
194static int spear_ohci_hcd_drv_suspend(struct platform_device *dev,
195 pm_message_t message)
196{
197 struct usb_hcd *hcd = platform_get_drvdata(dev);
198 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
199 struct spear_ohci *ohci_p = to_spear_ohci(hcd);
200
201 if (time_before(jiffies, ohci->next_statechange))
202 msleep(5);
203 ohci->next_statechange = jiffies;
204
205 spear_stop_ohci(ohci_p);
206 ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
207 return 0;
208}
209
210static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
211{
212 struct usb_hcd *hcd = platform_get_drvdata(dev);
213 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
214 struct spear_ohci *ohci_p = to_spear_ohci(hcd);
215
216 if (time_before(jiffies, ohci->next_statechange))
217 msleep(5);
218 ohci->next_statechange = jiffies;
219
220 spear_start_ohci(ohci_p);
221 ohci_finish_controller_resume(hcd);
222 return 0;
223}
224#endif
225
226/* Driver definition to register with the platform bus */
227static struct platform_driver spear_ohci_hcd_driver = {
228 .probe = spear_ohci_hcd_drv_probe,
229 .remove = spear_ohci_hcd_drv_remove,
230#ifdef CONFIG_PM
231 .suspend = spear_ohci_hcd_drv_suspend,
232 .resume = spear_ohci_hcd_drv_resume,
233#endif
234 .driver = {
235 .owner = THIS_MODULE,
236 .name = "spear-ohci",
237 },
238};
239
240MODULE_ALIAS("platform:spear-ohci");
1/*
2* OHCI HCD (Host Controller Driver) for USB.
3*
4* Copyright (C) 2010 ST Microelectronics.
5* Deepak Sikri<deepak.sikri@st.com>
6*
7* Based on various ohci-*.c drivers
8*
9* This file is licensed under the terms of the GNU General Public
10* License version 2. This program is licensed "as is" without any
11* warranty of any kind, whether express or implied.
12*/
13
14#include <linux/signal.h>
15#include <linux/platform_device.h>
16#include <linux/clk.h>
17#include <linux/of.h>
18
19struct spear_ohci {
20 struct ohci_hcd ohci;
21 struct clk *clk;
22};
23
24#define to_spear_ohci(hcd) (struct spear_ohci *)hcd_to_ohci(hcd)
25
26static void spear_start_ohci(struct spear_ohci *ohci)
27{
28 clk_prepare_enable(ohci->clk);
29}
30
31static void spear_stop_ohci(struct spear_ohci *ohci)
32{
33 clk_disable_unprepare(ohci->clk);
34}
35
36static int __devinit ohci_spear_start(struct usb_hcd *hcd)
37{
38 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
39 int ret;
40
41 ret = ohci_init(ohci);
42 if (ret < 0)
43 return ret;
44 ohci->regs = hcd->regs;
45
46 ret = ohci_run(ohci);
47 if (ret < 0) {
48 dev_err(hcd->self.controller, "can't start\n");
49 ohci_stop(hcd);
50 return ret;
51 }
52
53 create_debug_files(ohci);
54
55#ifdef DEBUG
56 ohci_dump(ohci, 1);
57#endif
58 return 0;
59}
60
61static const struct hc_driver ohci_spear_hc_driver = {
62 .description = hcd_name,
63 .product_desc = "SPEAr OHCI",
64 .hcd_priv_size = sizeof(struct spear_ohci),
65
66 /* generic hardware linkage */
67 .irq = ohci_irq,
68 .flags = HCD_USB11 | HCD_MEMORY,
69
70 /* basic lifecycle operations */
71 .start = ohci_spear_start,
72 .stop = ohci_stop,
73 .shutdown = ohci_shutdown,
74#ifdef CONFIG_PM
75 .bus_suspend = ohci_bus_suspend,
76 .bus_resume = ohci_bus_resume,
77#endif
78
79 /* managing i/o requests and associated device resources */
80 .urb_enqueue = ohci_urb_enqueue,
81 .urb_dequeue = ohci_urb_dequeue,
82 .endpoint_disable = ohci_endpoint_disable,
83
84 /* scheduling support */
85 .get_frame_number = ohci_get_frame,
86
87 /* root hub support */
88 .hub_status_data = ohci_hub_status_data,
89 .hub_control = ohci_hub_control,
90
91 .start_port_reset = ohci_start_port_reset,
92};
93
94static u64 spear_ohci_dma_mask = DMA_BIT_MASK(32);
95
96static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
97{
98 const struct hc_driver *driver = &ohci_spear_hc_driver;
99 struct usb_hcd *hcd = NULL;
100 struct clk *usbh_clk;
101 struct spear_ohci *ohci_p;
102 struct resource *res;
103 int retval, irq;
104 char clk_name[20] = "usbh_clk";
105 static int instance = -1;
106
107 irq = platform_get_irq(pdev, 0);
108 if (irq < 0) {
109 retval = irq;
110 goto fail_irq_get;
111 }
112
113 /*
114 * Right now device-tree probed devices don't get dma_mask set.
115 * Since shared usb code relies on it, set it here for now.
116 * Once we have dma capability bindings this can go away.
117 */
118 if (!pdev->dev.dma_mask)
119 pdev->dev.dma_mask = &spear_ohci_dma_mask;
120
121 /*
122 * Increment the device instance, when probing via device-tree
123 */
124 if (pdev->id < 0)
125 instance++;
126 else
127 instance = pdev->id;
128 sprintf(clk_name, "usbh.%01d_clk", instance);
129
130 usbh_clk = clk_get(NULL, clk_name);
131 if (IS_ERR(usbh_clk)) {
132 dev_err(&pdev->dev, "Error getting interface clock\n");
133 retval = PTR_ERR(usbh_clk);
134 goto fail_get_usbh_clk;
135 }
136
137 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
138 if (!hcd) {
139 retval = -ENOMEM;
140 goto fail_create_hcd;
141 }
142
143 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
144 if (!res) {
145 retval = -ENODEV;
146 goto fail_request_resource;
147 }
148
149 hcd->rsrc_start = pdev->resource[0].start;
150 hcd->rsrc_len = resource_size(res);
151 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
152 dev_dbg(&pdev->dev, "request_mem_region failed\n");
153 retval = -EBUSY;
154 goto fail_request_resource;
155 }
156
157 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
158 if (!hcd->regs) {
159 dev_dbg(&pdev->dev, "ioremap failed\n");
160 retval = -ENOMEM;
161 goto fail_ioremap;
162 }
163
164 ohci_p = (struct spear_ohci *)hcd_to_ohci(hcd);
165 ohci_p->clk = usbh_clk;
166 spear_start_ohci(ohci_p);
167 ohci_hcd_init(hcd_to_ohci(hcd));
168
169 retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), 0);
170 if (retval == 0)
171 return retval;
172
173 spear_stop_ohci(ohci_p);
174 iounmap(hcd->regs);
175fail_ioremap:
176 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
177fail_request_resource:
178 usb_put_hcd(hcd);
179fail_create_hcd:
180 clk_put(usbh_clk);
181fail_get_usbh_clk:
182fail_irq_get:
183 dev_err(&pdev->dev, "init fail, %d\n", retval);
184
185 return retval;
186}
187
188static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
189{
190 struct usb_hcd *hcd = platform_get_drvdata(pdev);
191 struct spear_ohci *ohci_p = to_spear_ohci(hcd);
192
193 usb_remove_hcd(hcd);
194 if (ohci_p->clk)
195 spear_stop_ohci(ohci_p);
196
197 iounmap(hcd->regs);
198 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
199 usb_put_hcd(hcd);
200
201 if (ohci_p->clk)
202 clk_put(ohci_p->clk);
203 platform_set_drvdata(pdev, NULL);
204 return 0;
205}
206
207#if defined(CONFIG_PM)
208static int spear_ohci_hcd_drv_suspend(struct platform_device *dev,
209 pm_message_t message)
210{
211 struct usb_hcd *hcd = platform_get_drvdata(dev);
212 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
213 struct spear_ohci *ohci_p = to_spear_ohci(hcd);
214
215 if (time_before(jiffies, ohci->next_statechange))
216 msleep(5);
217 ohci->next_statechange = jiffies;
218
219 spear_stop_ohci(ohci_p);
220 return 0;
221}
222
223static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
224{
225 struct usb_hcd *hcd = platform_get_drvdata(dev);
226 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
227 struct spear_ohci *ohci_p = to_spear_ohci(hcd);
228
229 if (time_before(jiffies, ohci->next_statechange))
230 msleep(5);
231 ohci->next_statechange = jiffies;
232
233 spear_start_ohci(ohci_p);
234 ohci_finish_controller_resume(hcd);
235 return 0;
236}
237#endif
238
239static struct of_device_id spear_ohci_id_table[] __devinitdata = {
240 { .compatible = "st,spear600-ohci", },
241 { },
242};
243
244/* Driver definition to register with the platform bus */
245static struct platform_driver spear_ohci_hcd_driver = {
246 .probe = spear_ohci_hcd_drv_probe,
247 .remove = spear_ohci_hcd_drv_remove,
248#ifdef CONFIG_PM
249 .suspend = spear_ohci_hcd_drv_suspend,
250 .resume = spear_ohci_hcd_drv_resume,
251#endif
252 .driver = {
253 .owner = THIS_MODULE,
254 .name = "spear-ohci",
255 .of_match_table = of_match_ptr(spear_ohci_id_table),
256 },
257};
258
259MODULE_ALIAS("platform:spear-ohci");