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1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * OHCI HCD (Host Controller Driver) for USB.
4 *
5 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
6 * (C) Copyright 2000-2005 David Brownell
7 * (C) Copyright 2002 Hewlett-Packard Company
8 * (C) Copyright 2008 Magnus Damm
9 *
10 * SM501 Bus Glue - based on ohci-omap.c
11 *
12 * This file is licenced under the GPL.
13 */
14
15#include <linux/interrupt.h>
16#include <linux/jiffies.h>
17#include <linux/platform_device.h>
18#include <linux/dma-mapping.h>
19#include <linux/sm501.h>
20#include <linux/sm501-regs.h>
21
22static int ohci_sm501_init(struct usb_hcd *hcd)
23{
24 return ohci_init(hcd_to_ohci(hcd));
25}
26
27static int ohci_sm501_start(struct usb_hcd *hcd)
28{
29 struct device *dev = hcd->self.controller;
30 int ret;
31
32 ret = ohci_run(hcd_to_ohci(hcd));
33 if (ret < 0) {
34 dev_err(dev, "can't start %s", hcd->self.bus_name);
35 ohci_stop(hcd);
36 }
37
38 return ret;
39}
40
41/*-------------------------------------------------------------------------*/
42
43static const struct hc_driver ohci_sm501_hc_driver = {
44 .description = hcd_name,
45 .product_desc = "SM501 OHCI",
46 .hcd_priv_size = sizeof(struct ohci_hcd),
47
48 /*
49 * generic hardware linkage
50 */
51 .irq = ohci_irq,
52 .flags = HCD_USB11 | HCD_MEMORY,
53
54 /*
55 * basic lifecycle operations
56 */
57 .reset = ohci_sm501_init,
58 .start = ohci_sm501_start,
59 .stop = ohci_stop,
60 .shutdown = ohci_shutdown,
61
62 /*
63 * managing i/o requests and associated device resources
64 */
65 .urb_enqueue = ohci_urb_enqueue,
66 .urb_dequeue = ohci_urb_dequeue,
67 .endpoint_disable = ohci_endpoint_disable,
68
69 /*
70 * scheduling support
71 */
72 .get_frame_number = ohci_get_frame,
73
74 /*
75 * root hub support
76 */
77 .hub_status_data = ohci_hub_status_data,
78 .hub_control = ohci_hub_control,
79#ifdef CONFIG_PM
80 .bus_suspend = ohci_bus_suspend,
81 .bus_resume = ohci_bus_resume,
82#endif
83 .start_port_reset = ohci_start_port_reset,
84};
85
86/*-------------------------------------------------------------------------*/
87
88static int ohci_hcd_sm501_drv_probe(struct platform_device *pdev)
89{
90 const struct hc_driver *driver = &ohci_sm501_hc_driver;
91 struct device *dev = &pdev->dev;
92 struct resource *res, *mem;
93 int retval, irq;
94 struct usb_hcd *hcd = NULL;
95
96 irq = retval = platform_get_irq(pdev, 0);
97 if (retval < 0)
98 goto err0;
99
100 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
101 if (mem == NULL) {
102 dev_err(dev, "no resource definition for memory\n");
103 retval = -ENOENT;
104 goto err0;
105 }
106
107 if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) {
108 dev_err(dev, "request_mem_region failed\n");
109 retval = -EBUSY;
110 goto err0;
111 }
112
113 /* allocate, reserve and remap resources for registers */
114 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
115 if (res == NULL) {
116 dev_err(dev, "no resource definition for registers\n");
117 retval = -ENOENT;
118 goto err1;
119 }
120
121 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
122 if (!hcd) {
123 retval = -ENOMEM;
124 goto err1;
125 }
126
127 hcd->rsrc_start = res->start;
128 hcd->rsrc_len = resource_size(res);
129
130 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, pdev->name)) {
131 dev_err(dev, "request_mem_region failed\n");
132 retval = -EBUSY;
133 goto err3;
134 }
135
136 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
137 if (hcd->regs == NULL) {
138 dev_err(dev, "cannot remap registers\n");
139 retval = -ENXIO;
140 goto err4;
141 }
142
143 ohci_hcd_init(hcd_to_ohci(hcd));
144
145 /* The sm501 chip is equipped with local memory that may be used
146 * by on-chip devices such as the video controller and the usb host.
147 * This driver uses genalloc so that usb allocations with
148 * gen_pool_dma_alloc() allocate from this local memory. The dma_handle
149 * returned by gen_pool_dma_alloc() will be an offset starting from 0
150 * for the first local memory byte.
151 *
152 * So as long as data is allocated using gen_pool_dma_alloc() all is
153 * fine. This is however not always the case - buffers may be allocated
154 * using kmalloc() - so the usb core needs to be told that it must copy
155 * data into our local memory if the buffers happen to be placed in
156 * regular memory. A non-null hcd->localmem_pool initialized by
157 * the call to usb_hcd_setup_local_mem() below does just that.
158 */
159
160 retval = usb_hcd_setup_local_mem(hcd, mem->start,
161 mem->start - mem->parent->start,
162 resource_size(mem));
163 if (retval < 0)
164 goto err5;
165 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
166 if (retval)
167 goto err5;
168 device_wakeup_enable(hcd->self.controller);
169
170 /* enable power and unmask interrupts */
171
172 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
173 sm501_modify_reg(dev->parent, SM501_IRQ_MASK, 1 << 6, 0);
174
175 return 0;
176err5:
177 iounmap(hcd->regs);
178err4:
179 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
180err3:
181 usb_put_hcd(hcd);
182err1:
183 release_mem_region(mem->start, resource_size(mem));
184err0:
185 return retval;
186}
187
188static void ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
189{
190 struct usb_hcd *hcd = platform_get_drvdata(pdev);
191 struct resource *mem;
192
193 usb_remove_hcd(hcd);
194 iounmap(hcd->regs);
195 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
196 usb_put_hcd(hcd);
197 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
198 release_mem_region(mem->start, resource_size(mem));
199
200 /* mask interrupts and disable power */
201
202 sm501_modify_reg(pdev->dev.parent, SM501_IRQ_MASK, 0, 1 << 6);
203 sm501_unit_power(pdev->dev.parent, SM501_GATE_USB_HOST, 0);
204}
205
206/*-------------------------------------------------------------------------*/
207
208#ifdef CONFIG_PM
209static int ohci_sm501_suspend(struct platform_device *pdev, pm_message_t msg)
210{
211 struct device *dev = &pdev->dev;
212 struct usb_hcd *hcd = platform_get_drvdata(pdev);
213 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
214 bool do_wakeup = device_may_wakeup(dev);
215 int ret;
216
217 if (time_before(jiffies, ohci->next_statechange))
218 msleep(5);
219 ohci->next_statechange = jiffies;
220
221 ret = ohci_suspend(hcd, do_wakeup);
222 if (ret)
223 return ret;
224
225 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 0);
226 return ret;
227}
228
229static int ohci_sm501_resume(struct platform_device *pdev)
230{
231 struct device *dev = &pdev->dev;
232 struct usb_hcd *hcd = platform_get_drvdata(pdev);
233 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
234
235 if (time_before(jiffies, ohci->next_statechange))
236 msleep(5);
237 ohci->next_statechange = jiffies;
238
239 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
240 ohci_resume(hcd, false);
241 return 0;
242}
243#else
244#define ohci_sm501_suspend NULL
245#define ohci_sm501_resume NULL
246#endif
247
248/*-------------------------------------------------------------------------*/
249
250/*
251 * Driver definition to register with the SM501 bus
252 */
253static struct platform_driver ohci_hcd_sm501_driver = {
254 .probe = ohci_hcd_sm501_drv_probe,
255 .remove_new = ohci_hcd_sm501_drv_remove,
256 .shutdown = usb_hcd_platform_shutdown,
257 .suspend = ohci_sm501_suspend,
258 .resume = ohci_sm501_resume,
259 .driver = {
260 .name = "sm501-usb",
261 },
262};
263MODULE_ALIAS("platform:sm501-usb");
1/*
2 * OHCI HCD (Host Controller Driver) for USB.
3 *
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2005 David Brownell
6 * (C) Copyright 2002 Hewlett-Packard Company
7 * (C) Copyright 2008 Magnus Damm
8 *
9 * SM501 Bus Glue - based on ohci-omap.c
10 *
11 * This file is licenced under the GPL.
12 */
13
14#include <linux/interrupt.h>
15#include <linux/jiffies.h>
16#include <linux/platform_device.h>
17#include <linux/dma-mapping.h>
18#include <linux/sm501.h>
19#include <linux/sm501-regs.h>
20
21static int ohci_sm501_init(struct usb_hcd *hcd)
22{
23 return ohci_init(hcd_to_ohci(hcd));
24}
25
26static int ohci_sm501_start(struct usb_hcd *hcd)
27{
28 struct device *dev = hcd->self.controller;
29 int ret;
30
31 ret = ohci_run(hcd_to_ohci(hcd));
32 if (ret < 0) {
33 dev_err(dev, "can't start %s", hcd->self.bus_name);
34 ohci_stop(hcd);
35 }
36
37 return ret;
38}
39
40/*-------------------------------------------------------------------------*/
41
42static const struct hc_driver ohci_sm501_hc_driver = {
43 .description = hcd_name,
44 .product_desc = "SM501 OHCI",
45 .hcd_priv_size = sizeof(struct ohci_hcd),
46
47 /*
48 * generic hardware linkage
49 */
50 .irq = ohci_irq,
51 .flags = HCD_USB11 | HCD_MEMORY | HCD_LOCAL_MEM,
52
53 /*
54 * basic lifecycle operations
55 */
56 .reset = ohci_sm501_init,
57 .start = ohci_sm501_start,
58 .stop = ohci_stop,
59 .shutdown = ohci_shutdown,
60
61 /*
62 * managing i/o requests and associated device resources
63 */
64 .urb_enqueue = ohci_urb_enqueue,
65 .urb_dequeue = ohci_urb_dequeue,
66 .endpoint_disable = ohci_endpoint_disable,
67
68 /*
69 * scheduling support
70 */
71 .get_frame_number = ohci_get_frame,
72
73 /*
74 * root hub support
75 */
76 .hub_status_data = ohci_hub_status_data,
77 .hub_control = ohci_hub_control,
78#ifdef CONFIG_PM
79 .bus_suspend = ohci_bus_suspend,
80 .bus_resume = ohci_bus_resume,
81#endif
82 .start_port_reset = ohci_start_port_reset,
83};
84
85/*-------------------------------------------------------------------------*/
86
87static int ohci_hcd_sm501_drv_probe(struct platform_device *pdev)
88{
89 const struct hc_driver *driver = &ohci_sm501_hc_driver;
90 struct device *dev = &pdev->dev;
91 struct resource *res, *mem;
92 int retval, irq;
93 struct usb_hcd *hcd = NULL;
94
95 irq = retval = platform_get_irq(pdev, 0);
96 if (retval < 0)
97 goto err0;
98
99 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
100 if (mem == NULL) {
101 dev_err(dev, "no resource definition for memory\n");
102 retval = -ENOENT;
103 goto err0;
104 }
105
106 if (!request_mem_region(mem->start, resource_size(mem), pdev->name)) {
107 dev_err(dev, "request_mem_region failed\n");
108 retval = -EBUSY;
109 goto err0;
110 }
111
112 /* The sm501 chip is equipped with local memory that may be used
113 * by on-chip devices such as the video controller and the usb host.
114 * This driver uses dma_declare_coherent_memory() to make sure
115 * usb allocations with dma_alloc_coherent() allocate from
116 * this local memory. The dma_handle returned by dma_alloc_coherent()
117 * will be an offset starting from 0 for the first local memory byte.
118 *
119 * So as long as data is allocated using dma_alloc_coherent() all is
120 * fine. This is however not always the case - buffers may be allocated
121 * using kmalloc() - so the usb core needs to be told that it must copy
122 * data into our local memory if the buffers happen to be placed in
123 * regular memory. The HCD_LOCAL_MEM flag does just that.
124 */
125
126 if (!dma_declare_coherent_memory(dev, mem->start,
127 mem->start - mem->parent->start,
128 resource_size(mem),
129 DMA_MEMORY_MAP |
130 DMA_MEMORY_EXCLUSIVE)) {
131 dev_err(dev, "cannot declare coherent memory\n");
132 retval = -ENXIO;
133 goto err1;
134 }
135
136 /* allocate, reserve and remap resources for registers */
137 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
138 if (res == NULL) {
139 dev_err(dev, "no resource definition for registers\n");
140 retval = -ENOENT;
141 goto err2;
142 }
143
144 hcd = usb_create_hcd(driver, &pdev->dev, dev_name(&pdev->dev));
145 if (!hcd) {
146 retval = -ENOMEM;
147 goto err2;
148 }
149
150 hcd->rsrc_start = res->start;
151 hcd->rsrc_len = resource_size(res);
152
153 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, pdev->name)) {
154 dev_err(dev, "request_mem_region failed\n");
155 retval = -EBUSY;
156 goto err3;
157 }
158
159 hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
160 if (hcd->regs == NULL) {
161 dev_err(dev, "cannot remap registers\n");
162 retval = -ENXIO;
163 goto err4;
164 }
165
166 ohci_hcd_init(hcd_to_ohci(hcd));
167
168 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
169 if (retval)
170 goto err5;
171 device_wakeup_enable(hcd->self.controller);
172
173 /* enable power and unmask interrupts */
174
175 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
176 sm501_modify_reg(dev->parent, SM501_IRQ_MASK, 1 << 6, 0);
177
178 return 0;
179err5:
180 iounmap(hcd->regs);
181err4:
182 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
183err3:
184 usb_put_hcd(hcd);
185err2:
186 dma_release_declared_memory(dev);
187err1:
188 release_mem_region(mem->start, resource_size(mem));
189err0:
190 return retval;
191}
192
193static int ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
194{
195 struct usb_hcd *hcd = platform_get_drvdata(pdev);
196 struct resource *mem;
197
198 usb_remove_hcd(hcd);
199 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
200 usb_put_hcd(hcd);
201 dma_release_declared_memory(&pdev->dev);
202 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
203 if (mem)
204 release_mem_region(mem->start, resource_size(mem));
205
206 /* mask interrupts and disable power */
207
208 sm501_modify_reg(pdev->dev.parent, SM501_IRQ_MASK, 0, 1 << 6);
209 sm501_unit_power(pdev->dev.parent, SM501_GATE_USB_HOST, 0);
210
211 return 0;
212}
213
214/*-------------------------------------------------------------------------*/
215
216#ifdef CONFIG_PM
217static int ohci_sm501_suspend(struct platform_device *pdev, pm_message_t msg)
218{
219 struct device *dev = &pdev->dev;
220 struct usb_hcd *hcd = platform_get_drvdata(pdev);
221 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
222 bool do_wakeup = device_may_wakeup(dev);
223 int ret;
224
225 if (time_before(jiffies, ohci->next_statechange))
226 msleep(5);
227 ohci->next_statechange = jiffies;
228
229 ret = ohci_suspend(hcd, do_wakeup);
230 if (ret)
231 return ret;
232
233 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 0);
234 return ret;
235}
236
237static int ohci_sm501_resume(struct platform_device *pdev)
238{
239 struct device *dev = &pdev->dev;
240 struct usb_hcd *hcd = platform_get_drvdata(pdev);
241 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
242
243 if (time_before(jiffies, ohci->next_statechange))
244 msleep(5);
245 ohci->next_statechange = jiffies;
246
247 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
248 ohci_resume(hcd, false);
249 return 0;
250}
251#else
252#define ohci_sm501_suspend NULL
253#define ohci_sm501_resume NULL
254#endif
255
256/*-------------------------------------------------------------------------*/
257
258/*
259 * Driver definition to register with the SM501 bus
260 */
261static struct platform_driver ohci_hcd_sm501_driver = {
262 .probe = ohci_hcd_sm501_drv_probe,
263 .remove = ohci_hcd_sm501_drv_remove,
264 .shutdown = usb_hcd_platform_shutdown,
265 .suspend = ohci_sm501_suspend,
266 .resume = ohci_sm501_resume,
267 .driver = {
268 .owner = THIS_MODULE,
269 .name = "sm501-usb",
270 },
271};
272MODULE_ALIAS("platform:sm501-usb");