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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_DISABLED | IRQF_SHARED);
169 if (retval)
170 goto err5;
171
172 /* enable power and unmask interrupts */
173
174 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
175 sm501_modify_reg(dev->parent, SM501_IRQ_MASK, 1 << 6, 0);
176
177 return 0;
178err5:
179 iounmap(hcd->regs);
180err4:
181 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
182err3:
183 usb_put_hcd(hcd);
184err2:
185 dma_release_declared_memory(dev);
186err1:
187 release_mem_region(mem->start, resource_size(mem));
188err0:
189 return retval;
190}
191
192static int ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
193{
194 struct usb_hcd *hcd = platform_get_drvdata(pdev);
195 struct resource *mem;
196
197 usb_remove_hcd(hcd);
198 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
199 usb_put_hcd(hcd);
200 dma_release_declared_memory(&pdev->dev);
201 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
202 if (mem)
203 release_mem_region(mem->start, resource_size(mem));
204
205 /* mask interrupts and disable power */
206
207 sm501_modify_reg(pdev->dev.parent, SM501_IRQ_MASK, 0, 1 << 6);
208 sm501_unit_power(pdev->dev.parent, SM501_GATE_USB_HOST, 0);
209
210 platform_set_drvdata(pdev, NULL);
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 ohci_hcd *ohci = hcd_to_ohci(platform_get_drvdata(pdev));
221
222 if (time_before(jiffies, ohci->next_statechange))
223 msleep(5);
224 ohci->next_statechange = jiffies;
225
226 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 0);
227 ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
228 return 0;
229}
230
231static int ohci_sm501_resume(struct platform_device *pdev)
232{
233 struct device *dev = &pdev->dev;
234 struct usb_hcd *hcd = platform_get_drvdata(pdev);
235 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
236
237 if (time_before(jiffies, ohci->next_statechange))
238 msleep(5);
239 ohci->next_statechange = jiffies;
240
241 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
242 ohci_finish_controller_resume(hcd);
243 return 0;
244}
245#else
246#define ohci_sm501_suspend NULL
247#define ohci_sm501_resume NULL
248#endif
249
250/*-------------------------------------------------------------------------*/
251
252/*
253 * Driver definition to register with the SM501 bus
254 */
255static struct platform_driver ohci_hcd_sm501_driver = {
256 .probe = ohci_hcd_sm501_drv_probe,
257 .remove = ohci_hcd_sm501_drv_remove,
258 .shutdown = usb_hcd_platform_shutdown,
259 .suspend = ohci_sm501_suspend,
260 .resume = ohci_sm501_resume,
261 .driver = {
262 .owner = THIS_MODULE,
263 .name = "sm501-usb",
264 },
265};
266MODULE_ALIAS("platform:sm501-usb");
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 the
157 * the call to usb_hcd_setup_local_mem() below does just that.
158 */
159
160 if (usb_hcd_setup_local_mem(hcd, mem->start,
161 mem->start - mem->parent->start,
162 resource_size(mem)) < 0)
163 goto err5;
164 retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
165 if (retval)
166 goto err5;
167 device_wakeup_enable(hcd->self.controller);
168
169 /* enable power and unmask interrupts */
170
171 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
172 sm501_modify_reg(dev->parent, SM501_IRQ_MASK, 1 << 6, 0);
173
174 return 0;
175err5:
176 iounmap(hcd->regs);
177err4:
178 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
179err3:
180 usb_put_hcd(hcd);
181err1:
182 release_mem_region(mem->start, resource_size(mem));
183err0:
184 return retval;
185}
186
187static int ohci_hcd_sm501_drv_remove(struct platform_device *pdev)
188{
189 struct usb_hcd *hcd = platform_get_drvdata(pdev);
190 struct resource *mem;
191
192 usb_remove_hcd(hcd);
193 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
194 usb_put_hcd(hcd);
195 mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
196 if (mem)
197 release_mem_region(mem->start, resource_size(mem));
198
199 /* mask interrupts and disable power */
200
201 sm501_modify_reg(pdev->dev.parent, SM501_IRQ_MASK, 0, 1 << 6);
202 sm501_unit_power(pdev->dev.parent, SM501_GATE_USB_HOST, 0);
203
204 return 0;
205}
206
207/*-------------------------------------------------------------------------*/
208
209#ifdef CONFIG_PM
210static int ohci_sm501_suspend(struct platform_device *pdev, pm_message_t msg)
211{
212 struct device *dev = &pdev->dev;
213 struct usb_hcd *hcd = platform_get_drvdata(pdev);
214 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
215 bool do_wakeup = device_may_wakeup(dev);
216 int ret;
217
218 if (time_before(jiffies, ohci->next_statechange))
219 msleep(5);
220 ohci->next_statechange = jiffies;
221
222 ret = ohci_suspend(hcd, do_wakeup);
223 if (ret)
224 return ret;
225
226 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 0);
227 return ret;
228}
229
230static int ohci_sm501_resume(struct platform_device *pdev)
231{
232 struct device *dev = &pdev->dev;
233 struct usb_hcd *hcd = platform_get_drvdata(pdev);
234 struct ohci_hcd *ohci = hcd_to_ohci(hcd);
235
236 if (time_before(jiffies, ohci->next_statechange))
237 msleep(5);
238 ohci->next_statechange = jiffies;
239
240 sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 1);
241 ohci_resume(hcd, false);
242 return 0;
243}
244#else
245#define ohci_sm501_suspend NULL
246#define ohci_sm501_resume NULL
247#endif
248
249/*-------------------------------------------------------------------------*/
250
251/*
252 * Driver definition to register with the SM501 bus
253 */
254static struct platform_driver ohci_hcd_sm501_driver = {
255 .probe = ohci_hcd_sm501_drv_probe,
256 .remove = ohci_hcd_sm501_drv_remove,
257 .shutdown = usb_hcd_platform_shutdown,
258 .suspend = ohci_sm501_suspend,
259 .resume = ohci_sm501_resume,
260 .driver = {
261 .name = "sm501-usb",
262 },
263};
264MODULE_ALIAS("platform:sm501-usb");