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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/clk.h>
15#include <linux/dma-mapping.h>
16#include <linux/io.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/of.h>
20#include <linux/platform_device.h>
21#include <linux/signal.h>
22#include <linux/usb.h>
23#include <linux/usb/hcd.h>
24
25#include "ohci.h"
26
27#define DRIVER_DESC "OHCI SPEAr driver"
28
29static const char hcd_name[] = "SPEAr-ohci";
30struct spear_ohci {
31 struct clk *clk;
32};
33
34#define to_spear_ohci(hcd) (struct spear_ohci *)(hcd_to_ohci(hcd)->priv)
35
36static struct hc_driver __read_mostly ohci_spear_hc_driver;
37
38static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
39{
40 const struct hc_driver *driver = &ohci_spear_hc_driver;
41 struct ohci_hcd *ohci;
42 struct usb_hcd *hcd = NULL;
43 struct clk *usbh_clk;
44 struct spear_ohci *sohci_p;
45 struct resource *res;
46 int retval, irq;
47
48 irq = platform_get_irq(pdev, 0);
49 if (irq < 0) {
50 retval = irq;
51 goto fail;
52 }
53
54 /*
55 * Right now device-tree probed devices don't get dma_mask set.
56 * Since shared usb code relies on it, set it here for now.
57 * Once we have dma capability bindings this can go away.
58 */
59 retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
60 if (retval)
61 goto fail;
62
63 usbh_clk = devm_clk_get(&pdev->dev, NULL);
64 if (IS_ERR(usbh_clk)) {
65 dev_err(&pdev->dev, "Error getting interface clock\n");
66 retval = PTR_ERR(usbh_clk);
67 goto fail;
68 }
69
70 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
71 if (!hcd) {
72 retval = -ENOMEM;
73 goto fail;
74 }
75
76 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
77 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
78 if (IS_ERR(hcd->regs)) {
79 retval = PTR_ERR(hcd->regs);
80 goto err_put_hcd;
81 }
82
83 hcd->rsrc_start = pdev->resource[0].start;
84 hcd->rsrc_len = resource_size(res);
85
86 sohci_p = to_spear_ohci(hcd);
87 sohci_p->clk = usbh_clk;
88
89 clk_prepare_enable(sohci_p->clk);
90
91 ohci = hcd_to_ohci(hcd);
92
93 retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), 0);
94 if (retval == 0) {
95 device_wakeup_enable(hcd->self.controller);
96 return retval;
97 }
98
99 clk_disable_unprepare(sohci_p->clk);
100err_put_hcd:
101 usb_put_hcd(hcd);
102fail:
103 dev_err(&pdev->dev, "init fail, %d\n", retval);
104
105 return retval;
106}
107
108static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
109{
110 struct usb_hcd *hcd = platform_get_drvdata(pdev);
111 struct spear_ohci *sohci_p = to_spear_ohci(hcd);
112
113 usb_remove_hcd(hcd);
114 if (sohci_p->clk)
115 clk_disable_unprepare(sohci_p->clk);
116
117 usb_put_hcd(hcd);
118 return 0;
119}
120
121#if defined(CONFIG_PM)
122static int spear_ohci_hcd_drv_suspend(struct platform_device *pdev,
123 pm_message_t message)
124{
125 struct usb_hcd *hcd = platform_get_drvdata(pdev);
126 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
127 struct spear_ohci *sohci_p = to_spear_ohci(hcd);
128 bool do_wakeup = device_may_wakeup(&pdev->dev);
129 int ret;
130
131 if (time_before(jiffies, ohci->next_statechange))
132 msleep(5);
133 ohci->next_statechange = jiffies;
134
135 ret = ohci_suspend(hcd, do_wakeup);
136 if (ret)
137 return ret;
138
139 clk_disable_unprepare(sohci_p->clk);
140
141 return ret;
142}
143
144static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
145{
146 struct usb_hcd *hcd = platform_get_drvdata(dev);
147 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
148 struct spear_ohci *sohci_p = to_spear_ohci(hcd);
149
150 if (time_before(jiffies, ohci->next_statechange))
151 msleep(5);
152 ohci->next_statechange = jiffies;
153
154 clk_prepare_enable(sohci_p->clk);
155 ohci_resume(hcd, false);
156 return 0;
157}
158#endif
159
160static const struct of_device_id spear_ohci_id_table[] = {
161 { .compatible = "st,spear600-ohci", },
162 { },
163};
164MODULE_DEVICE_TABLE(of, spear_ohci_id_table);
165
166/* Driver definition to register with the platform bus */
167static struct platform_driver spear_ohci_hcd_driver = {
168 .probe = spear_ohci_hcd_drv_probe,
169 .remove = spear_ohci_hcd_drv_remove,
170#ifdef CONFIG_PM
171 .suspend = spear_ohci_hcd_drv_suspend,
172 .resume = spear_ohci_hcd_drv_resume,
173#endif
174 .driver = {
175 .name = "spear-ohci",
176 .of_match_table = spear_ohci_id_table,
177 },
178};
179
180static const struct ohci_driver_overrides spear_overrides __initconst = {
181 .extra_priv_size = sizeof(struct spear_ohci),
182};
183static int __init ohci_spear_init(void)
184{
185 if (usb_disabled())
186 return -ENODEV;
187
188 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
189
190 ohci_init_driver(&ohci_spear_hc_driver, &spear_overrides);
191 return platform_driver_register(&spear_ohci_hcd_driver);
192}
193module_init(ohci_spear_init);
194
195static void __exit ohci_spear_cleanup(void)
196{
197 platform_driver_unregister(&spear_ohci_hcd_driver);
198}
199module_exit(ohci_spear_cleanup);
200
201MODULE_DESCRIPTION(DRIVER_DESC);
202MODULE_AUTHOR("Deepak Sikri");
203MODULE_LICENSE("GPL v2");
204MODULE_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/clk.h>
15#include <linux/dma-mapping.h>
16#include <linux/io.h>
17#include <linux/kernel.h>
18#include <linux/module.h>
19#include <linux/of.h>
20#include <linux/platform_device.h>
21#include <linux/signal.h>
22#include <linux/usb.h>
23#include <linux/usb/hcd.h>
24
25#include "ohci.h"
26
27#define DRIVER_DESC "OHCI SPEAr driver"
28
29static const char hcd_name[] = "SPEAr-ohci";
30struct spear_ohci {
31 struct clk *clk;
32};
33
34#define to_spear_ohci(hcd) (struct spear_ohci *)(hcd_to_ohci(hcd)->priv)
35
36static struct hc_driver __read_mostly ohci_spear_hc_driver;
37
38static int spear_ohci_hcd_drv_probe(struct platform_device *pdev)
39{
40 const struct hc_driver *driver = &ohci_spear_hc_driver;
41 struct ohci_hcd *ohci;
42 struct usb_hcd *hcd = NULL;
43 struct clk *usbh_clk;
44 struct spear_ohci *sohci_p;
45 struct resource *res;
46 int retval, irq;
47
48 irq = platform_get_irq(pdev, 0);
49 if (irq < 0) {
50 retval = irq;
51 goto fail;
52 }
53
54 /*
55 * Right now device-tree probed devices don't get dma_mask set.
56 * Since shared usb code relies on it, set it here for now.
57 * Once we have dma capability bindings this can go away.
58 */
59 retval = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
60 if (retval)
61 goto fail;
62
63 usbh_clk = devm_clk_get(&pdev->dev, NULL);
64 if (IS_ERR(usbh_clk)) {
65 dev_err(&pdev->dev, "Error getting interface clock\n");
66 retval = PTR_ERR(usbh_clk);
67 goto fail;
68 }
69
70 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
71 if (!hcd) {
72 retval = -ENOMEM;
73 goto fail;
74 }
75
76 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
77 if (!res) {
78 retval = -ENODEV;
79 goto err_put_hcd;
80 }
81
82 hcd->rsrc_start = pdev->resource[0].start;
83 hcd->rsrc_len = resource_size(res);
84
85 hcd->regs = devm_ioremap_resource(&pdev->dev, res);
86 if (IS_ERR(hcd->regs)) {
87 retval = PTR_ERR(hcd->regs);
88 goto err_put_hcd;
89 }
90
91 sohci_p = to_spear_ohci(hcd);
92 sohci_p->clk = usbh_clk;
93
94 clk_prepare_enable(sohci_p->clk);
95
96 ohci = hcd_to_ohci(hcd);
97
98 retval = usb_add_hcd(hcd, platform_get_irq(pdev, 0), 0);
99 if (retval == 0) {
100 device_wakeup_enable(hcd->self.controller);
101 return retval;
102 }
103
104 clk_disable_unprepare(sohci_p->clk);
105err_put_hcd:
106 usb_put_hcd(hcd);
107fail:
108 dev_err(&pdev->dev, "init fail, %d\n", retval);
109
110 return retval;
111}
112
113static int spear_ohci_hcd_drv_remove(struct platform_device *pdev)
114{
115 struct usb_hcd *hcd = platform_get_drvdata(pdev);
116 struct spear_ohci *sohci_p = to_spear_ohci(hcd);
117
118 usb_remove_hcd(hcd);
119 if (sohci_p->clk)
120 clk_disable_unprepare(sohci_p->clk);
121
122 usb_put_hcd(hcd);
123 return 0;
124}
125
126#if defined(CONFIG_PM)
127static int spear_ohci_hcd_drv_suspend(struct platform_device *pdev,
128 pm_message_t message)
129{
130 struct usb_hcd *hcd = platform_get_drvdata(pdev);
131 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
132 struct spear_ohci *sohci_p = to_spear_ohci(hcd);
133 bool do_wakeup = device_may_wakeup(&pdev->dev);
134 int ret;
135
136 if (time_before(jiffies, ohci->next_statechange))
137 msleep(5);
138 ohci->next_statechange = jiffies;
139
140 ret = ohci_suspend(hcd, do_wakeup);
141 if (ret)
142 return ret;
143
144 clk_disable_unprepare(sohci_p->clk);
145
146 return ret;
147}
148
149static int spear_ohci_hcd_drv_resume(struct platform_device *dev)
150{
151 struct usb_hcd *hcd = platform_get_drvdata(dev);
152 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
153 struct spear_ohci *sohci_p = to_spear_ohci(hcd);
154
155 if (time_before(jiffies, ohci->next_statechange))
156 msleep(5);
157 ohci->next_statechange = jiffies;
158
159 clk_prepare_enable(sohci_p->clk);
160 ohci_resume(hcd, false);
161 return 0;
162}
163#endif
164
165static struct of_device_id spear_ohci_id_table[] = {
166 { .compatible = "st,spear600-ohci", },
167 { },
168};
169
170/* Driver definition to register with the platform bus */
171static struct platform_driver spear_ohci_hcd_driver = {
172 .probe = spear_ohci_hcd_drv_probe,
173 .remove = spear_ohci_hcd_drv_remove,
174#ifdef CONFIG_PM
175 .suspend = spear_ohci_hcd_drv_suspend,
176 .resume = spear_ohci_hcd_drv_resume,
177#endif
178 .driver = {
179 .owner = THIS_MODULE,
180 .name = "spear-ohci",
181 .of_match_table = spear_ohci_id_table,
182 },
183};
184
185static const struct ohci_driver_overrides spear_overrides __initconst = {
186 .extra_priv_size = sizeof(struct spear_ohci),
187};
188static int __init ohci_spear_init(void)
189{
190 if (usb_disabled())
191 return -ENODEV;
192
193 pr_info("%s: " DRIVER_DESC "\n", hcd_name);
194
195 ohci_init_driver(&ohci_spear_hc_driver, &spear_overrides);
196 return platform_driver_register(&spear_ohci_hcd_driver);
197}
198module_init(ohci_spear_init);
199
200static void __exit ohci_spear_cleanup(void)
201{
202 platform_driver_unregister(&spear_ohci_hcd_driver);
203}
204module_exit(ohci_spear_cleanup);
205
206MODULE_DESCRIPTION(DRIVER_DESC);
207MODULE_AUTHOR("Deepak Sikri");
208MODULE_LICENSE("GPL v2");
209MODULE_ALIAS("platform:spear-ohci");