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1/*
2 * PMC MSP EHCI (Host Controller Driver) for USB.
3 *
4 * (C) Copyright 2006-2010 PMC-Sierra Inc
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 *
10 */
11
12/* includes */
13#include <linux/platform_device.h>
14#include <linux/gpio.h>
15#include <linux/usb.h>
16#include <msp_usb.h>
17
18/* stream disable*/
19#define USB_CTRL_MODE_STREAM_DISABLE 0x10
20
21/* threshold */
22#define USB_CTRL_FIFO_THRESH 0x00300000
23
24/* register offset for usb_mode */
25#define USB_EHCI_REG_USB_MODE 0x68
26
27/* register offset for usb fifo */
28#define USB_EHCI_REG_USB_FIFO 0x24
29
30/* register offset for usb status */
31#define USB_EHCI_REG_USB_STATUS 0x44
32
33/* serial/parallel transceiver */
34#define USB_EHCI_REG_BIT_STAT_STS (1<<29)
35
36/* TWI USB0 host device pin */
37#define MSP_PIN_USB0_HOST_DEV 49
38
39/* TWI USB1 host device pin */
40#define MSP_PIN_USB1_HOST_DEV 50
41
42
43static void usb_hcd_tdi_set_mode(struct ehci_hcd *ehci)
44{
45 u8 *base;
46 u8 *statreg;
47 u8 *fiforeg;
48 u32 val;
49 struct ehci_regs *reg_base = ehci->regs;
50
51 /* get register base */
52 base = (u8 *)reg_base + USB_EHCI_REG_USB_MODE;
53 statreg = (u8 *)reg_base + USB_EHCI_REG_USB_STATUS;
54 fiforeg = (u8 *)reg_base + USB_EHCI_REG_USB_FIFO;
55
56 /* Disable controller mode stream */
57 val = ehci_readl(ehci, (u32 *)base);
58 ehci_writel(ehci, (val | USB_CTRL_MODE_STREAM_DISABLE),
59 (u32 *)base);
60
61 /* clear STS to select parallel transceiver interface */
62 val = ehci_readl(ehci, (u32 *)statreg);
63 val = val & ~USB_EHCI_REG_BIT_STAT_STS;
64 ehci_writel(ehci, val, (u32 *)statreg);
65
66 /* write to set the proper fifo threshold */
67 ehci_writel(ehci, USB_CTRL_FIFO_THRESH, (u32 *)fiforeg);
68
69 /* set TWI GPIO USB_HOST_DEV pin high */
70 gpio_direction_output(MSP_PIN_USB0_HOST_DEV, 1);
71}
72
73/* called during probe() after chip reset completes */
74static int ehci_msp_setup(struct usb_hcd *hcd)
75{
76 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
77 int retval;
78
79 ehci->big_endian_mmio = 1;
80 ehci->big_endian_desc = 1;
81
82 ehci->caps = hcd->regs;
83 hcd->has_tt = 1;
84
85 retval = ehci_setup(hcd);
86 if (retval)
87 return retval;
88
89 usb_hcd_tdi_set_mode(ehci);
90
91 return retval;
92}
93
94
95/* configure so an HC device and id are always provided
96 * always called with process context; sleeping is OK
97 */
98
99static int usb_hcd_msp_map_regs(struct mspusb_device *dev)
100{
101 struct resource *res;
102 struct platform_device *pdev = &dev->dev;
103 u32 res_len;
104 int retval;
105
106 /* MAB register space */
107 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
108 if (res == NULL)
109 return -ENOMEM;
110 res_len = resource_size(res);
111 if (!request_mem_region(res->start, res_len, "mab regs"))
112 return -EBUSY;
113
114 dev->mab_regs = ioremap_nocache(res->start, res_len);
115 if (dev->mab_regs == NULL) {
116 retval = -ENOMEM;
117 goto err1;
118 }
119
120 /* MSP USB register space */
121 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
122 if (res == NULL) {
123 retval = -ENOMEM;
124 goto err2;
125 }
126 res_len = resource_size(res);
127 if (!request_mem_region(res->start, res_len, "usbid regs")) {
128 retval = -EBUSY;
129 goto err2;
130 }
131 dev->usbid_regs = ioremap_nocache(res->start, res_len);
132 if (dev->usbid_regs == NULL) {
133 retval = -ENOMEM;
134 goto err3;
135 }
136
137 return 0;
138err3:
139 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
140 res_len = resource_size(res);
141 release_mem_region(res->start, res_len);
142err2:
143 iounmap(dev->mab_regs);
144err1:
145 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
146 res_len = resource_size(res);
147 release_mem_region(res->start, res_len);
148 dev_err(&pdev->dev, "Failed to map non-EHCI regs.\n");
149 return retval;
150}
151
152/**
153 * usb_hcd_msp_probe - initialize PMC MSP-based HCDs
154 * Context: !in_interrupt()
155 *
156 * Allocates basic resources for this USB host controller, and
157 * then invokes the start() method for the HCD associated with it
158 * through the hotplug entry's driver_data.
159 *
160 */
161int usb_hcd_msp_probe(const struct hc_driver *driver,
162 struct platform_device *dev)
163{
164 int retval;
165 struct usb_hcd *hcd;
166 struct resource *res;
167 struct ehci_hcd *ehci ;
168
169 hcd = usb_create_hcd(driver, &dev->dev, "pmcmsp");
170 if (!hcd)
171 return -ENOMEM;
172
173 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
174 if (res == NULL) {
175 pr_debug("No IOMEM resource info for %s.\n", dev->name);
176 retval = -ENOMEM;
177 goto err1;
178 }
179 hcd->rsrc_start = res->start;
180 hcd->rsrc_len = resource_size(res);
181 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, dev->name)) {
182 retval = -EBUSY;
183 goto err1;
184 }
185 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
186 if (!hcd->regs) {
187 pr_debug("ioremap failed");
188 retval = -ENOMEM;
189 goto err2;
190 }
191
192 res = platform_get_resource(dev, IORESOURCE_IRQ, 0);
193 if (res == NULL) {
194 dev_err(&dev->dev, "No IRQ resource info for %s.\n", dev->name);
195 retval = -ENOMEM;
196 goto err3;
197 }
198
199 /* Map non-EHCI register spaces */
200 retval = usb_hcd_msp_map_regs(to_mspusb_device(dev));
201 if (retval != 0)
202 goto err3;
203
204 ehci = hcd_to_ehci(hcd);
205 ehci->big_endian_mmio = 1;
206 ehci->big_endian_desc = 1;
207
208
209 retval = usb_add_hcd(hcd, res->start, IRQF_SHARED);
210 if (retval == 0) {
211 device_wakeup_enable(hcd->self.controller);
212 return 0;
213 }
214
215 usb_remove_hcd(hcd);
216err3:
217 iounmap(hcd->regs);
218err2:
219 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
220err1:
221 usb_put_hcd(hcd);
222
223 return retval;
224}
225
226
227
228/**
229 * usb_hcd_msp_remove - shutdown processing for PMC MSP-based HCDs
230 * @dev: USB Host Controller being removed
231 * Context: !in_interrupt()
232 *
233 * Reverses the effect of usb_hcd_msp_probe(), first invoking
234 * the HCD's stop() method. It is always called from a thread
235 * context, normally "rmmod", "apmd", or something similar.
236 *
237 * may be called without controller electrically present
238 * may be called with controller, bus, and devices active
239 */
240void usb_hcd_msp_remove(struct usb_hcd *hcd, struct platform_device *dev)
241{
242 usb_remove_hcd(hcd);
243 iounmap(hcd->regs);
244 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
245 usb_put_hcd(hcd);
246}
247
248static const struct hc_driver ehci_msp_hc_driver = {
249 .description = hcd_name,
250 .product_desc = "PMC MSP EHCI",
251 .hcd_priv_size = sizeof(struct ehci_hcd),
252
253 /*
254 * generic hardware linkage
255 */
256 .irq = ehci_irq,
257 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
258
259 /*
260 * basic lifecycle operations
261 */
262 .reset = ehci_msp_setup,
263 .shutdown = ehci_shutdown,
264 .start = ehci_run,
265 .stop = ehci_stop,
266
267 /*
268 * managing i/o requests and associated device resources
269 */
270 .urb_enqueue = ehci_urb_enqueue,
271 .urb_dequeue = ehci_urb_dequeue,
272 .endpoint_disable = ehci_endpoint_disable,
273 .endpoint_reset = ehci_endpoint_reset,
274
275 /*
276 * scheduling support
277 */
278 .get_frame_number = ehci_get_frame,
279
280 /*
281 * root hub support
282 */
283 .hub_status_data = ehci_hub_status_data,
284 .hub_control = ehci_hub_control,
285 .bus_suspend = ehci_bus_suspend,
286 .bus_resume = ehci_bus_resume,
287 .relinquish_port = ehci_relinquish_port,
288 .port_handed_over = ehci_port_handed_over,
289
290 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
291};
292
293static int ehci_hcd_msp_drv_probe(struct platform_device *pdev)
294{
295 int ret;
296
297 pr_debug("In ehci_hcd_msp_drv_probe");
298
299 if (usb_disabled())
300 return -ENODEV;
301
302 gpio_request(MSP_PIN_USB0_HOST_DEV, "USB0_HOST_DEV_GPIO");
303
304 ret = usb_hcd_msp_probe(&ehci_msp_hc_driver, pdev);
305
306 return ret;
307}
308
309static int ehci_hcd_msp_drv_remove(struct platform_device *pdev)
310{
311 struct usb_hcd *hcd = platform_get_drvdata(pdev);
312
313 usb_hcd_msp_remove(hcd, pdev);
314
315 /* free TWI GPIO USB_HOST_DEV pin */
316 gpio_free(MSP_PIN_USB0_HOST_DEV);
317
318 return 0;
319}
320
321MODULE_ALIAS("pmcmsp-ehci");
322
323static struct platform_driver ehci_hcd_msp_driver = {
324 .probe = ehci_hcd_msp_drv_probe,
325 .remove = ehci_hcd_msp_drv_remove,
326 .driver = {
327 .name = "pmcmsp-ehci",
328 },
329};
1/*
2 * PMC MSP EHCI (Host Controller Driver) for USB.
3 *
4 * (C) Copyright 2006-2010 PMC-Sierra Inc
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 *
10 */
11
12/* includes */
13#include <linux/platform_device.h>
14#include <linux/gpio.h>
15#include <linux/usb.h>
16#include <msp_usb.h>
17
18/* stream disable*/
19#define USB_CTRL_MODE_STREAM_DISABLE 0x10
20
21/* threshold */
22#define USB_CTRL_FIFO_THRESH 0x00300000
23
24/* register offset for usb_mode */
25#define USB_EHCI_REG_USB_MODE 0x68
26
27/* register offset for usb fifo */
28#define USB_EHCI_REG_USB_FIFO 0x24
29
30/* register offset for usb status */
31#define USB_EHCI_REG_USB_STATUS 0x44
32
33/* serial/parallel transceiver */
34#define USB_EHCI_REG_BIT_STAT_STS (1<<29)
35
36/* TWI USB0 host device pin */
37#define MSP_PIN_USB0_HOST_DEV 49
38
39/* TWI USB1 host device pin */
40#define MSP_PIN_USB1_HOST_DEV 50
41
42
43static void usb_hcd_tdi_set_mode(struct ehci_hcd *ehci)
44{
45 u8 *base;
46 u8 *statreg;
47 u8 *fiforeg;
48 u32 val;
49 struct ehci_regs *reg_base = ehci->regs;
50
51 /* get register base */
52 base = (u8 *)reg_base + USB_EHCI_REG_USB_MODE;
53 statreg = (u8 *)reg_base + USB_EHCI_REG_USB_STATUS;
54 fiforeg = (u8 *)reg_base + USB_EHCI_REG_USB_FIFO;
55
56 /* Disable controller mode stream */
57 val = ehci_readl(ehci, (u32 *)base);
58 ehci_writel(ehci, (val | USB_CTRL_MODE_STREAM_DISABLE),
59 (u32 *)base);
60
61 /* clear STS to select parallel transceiver interface */
62 val = ehci_readl(ehci, (u32 *)statreg);
63 val = val & ~USB_EHCI_REG_BIT_STAT_STS;
64 ehci_writel(ehci, val, (u32 *)statreg);
65
66 /* write to set the proper fifo threshold */
67 ehci_writel(ehci, USB_CTRL_FIFO_THRESH, (u32 *)fiforeg);
68
69 /* set TWI GPIO USB_HOST_DEV pin high */
70 gpio_direction_output(MSP_PIN_USB0_HOST_DEV, 1);
71#ifdef CONFIG_MSP_HAS_DUAL_USB
72 gpio_direction_output(MSP_PIN_USB1_HOST_DEV, 1);
73#endif
74}
75
76/* called during probe() after chip reset completes */
77static int ehci_msp_setup(struct usb_hcd *hcd)
78{
79 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
80 int retval;
81
82 ehci->big_endian_mmio = 1;
83 ehci->big_endian_desc = 1;
84
85 ehci->caps = hcd->regs;
86 hcd->has_tt = 1;
87
88 retval = ehci_setup(hcd);
89 if (retval)
90 return retval;
91
92 usb_hcd_tdi_set_mode(ehci);
93
94 return retval;
95}
96
97
98/* configure so an HC device and id are always provided
99 * always called with process context; sleeping is OK
100 */
101
102static int usb_hcd_msp_map_regs(struct mspusb_device *dev)
103{
104 struct resource *res;
105 struct platform_device *pdev = &dev->dev;
106 u32 res_len;
107 int retval;
108
109 /* MAB register space */
110 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
111 if (res == NULL)
112 return -ENOMEM;
113 res_len = resource_size(res);
114 if (!request_mem_region(res->start, res_len, "mab regs"))
115 return -EBUSY;
116
117 dev->mab_regs = ioremap_nocache(res->start, res_len);
118 if (dev->mab_regs == NULL) {
119 retval = -ENOMEM;
120 goto err1;
121 }
122
123 /* MSP USB register space */
124 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
125 if (res == NULL) {
126 retval = -ENOMEM;
127 goto err2;
128 }
129 res_len = resource_size(res);
130 if (!request_mem_region(res->start, res_len, "usbid regs")) {
131 retval = -EBUSY;
132 goto err2;
133 }
134 dev->usbid_regs = ioremap_nocache(res->start, res_len);
135 if (dev->usbid_regs == NULL) {
136 retval = -ENOMEM;
137 goto err3;
138 }
139
140 return 0;
141err3:
142 res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
143 res_len = resource_size(res);
144 release_mem_region(res->start, res_len);
145err2:
146 iounmap(dev->mab_regs);
147err1:
148 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
149 res_len = resource_size(res);
150 release_mem_region(res->start, res_len);
151 dev_err(&pdev->dev, "Failed to map non-EHCI regs.\n");
152 return retval;
153}
154
155/**
156 * usb_hcd_msp_probe - initialize PMC MSP-based HCDs
157 * Context: !in_interrupt()
158 *
159 * Allocates basic resources for this USB host controller, and
160 * then invokes the start() method for the HCD associated with it
161 * through the hotplug entry's driver_data.
162 *
163 */
164int usb_hcd_msp_probe(const struct hc_driver *driver,
165 struct platform_device *dev)
166{
167 int retval;
168 struct usb_hcd *hcd;
169 struct resource *res;
170 struct ehci_hcd *ehci ;
171
172 hcd = usb_create_hcd(driver, &dev->dev, "pmcmsp");
173 if (!hcd)
174 return -ENOMEM;
175
176 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
177 if (res == NULL) {
178 pr_debug("No IOMEM resource info for %s.\n", dev->name);
179 retval = -ENOMEM;
180 goto err1;
181 }
182 hcd->rsrc_start = res->start;
183 hcd->rsrc_len = resource_size(res);
184 if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, dev->name)) {
185 retval = -EBUSY;
186 goto err1;
187 }
188 hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
189 if (!hcd->regs) {
190 pr_debug("ioremap failed");
191 retval = -ENOMEM;
192 goto err2;
193 }
194
195 res = platform_get_resource(dev, IORESOURCE_IRQ, 0);
196 if (res == NULL) {
197 dev_err(&dev->dev, "No IRQ resource info for %s.\n", dev->name);
198 retval = -ENOMEM;
199 goto err3;
200 }
201
202 /* Map non-EHCI register spaces */
203 retval = usb_hcd_msp_map_regs(to_mspusb_device(dev));
204 if (retval != 0)
205 goto err3;
206
207 ehci = hcd_to_ehci(hcd);
208 ehci->big_endian_mmio = 1;
209 ehci->big_endian_desc = 1;
210
211
212 retval = usb_add_hcd(hcd, res->start, IRQF_SHARED);
213 if (retval == 0) {
214 device_wakeup_enable(hcd->self.controller);
215 return 0;
216 }
217
218 usb_remove_hcd(hcd);
219err3:
220 iounmap(hcd->regs);
221err2:
222 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
223err1:
224 usb_put_hcd(hcd);
225
226 return retval;
227}
228
229
230
231/**
232 * usb_hcd_msp_remove - shutdown processing for PMC MSP-based HCDs
233 * @dev: USB Host Controller being removed
234 * Context: !in_interrupt()
235 *
236 * Reverses the effect of usb_hcd_msp_probe(), first invoking
237 * the HCD's stop() method. It is always called from a thread
238 * context, normally "rmmod", "apmd", or something similar.
239 *
240 * may be called without controller electrically present
241 * may be called with controller, bus, and devices active
242 */
243void usb_hcd_msp_remove(struct usb_hcd *hcd, struct platform_device *dev)
244{
245 usb_remove_hcd(hcd);
246 iounmap(hcd->regs);
247 release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
248 usb_put_hcd(hcd);
249}
250
251#ifdef CONFIG_MSP_HAS_DUAL_USB
252/*
253 * Wrapper around the main ehci_irq. Since both USB host controllers are
254 * sharing the same IRQ, need to first determine whether we're the intended
255 * recipient of this interrupt.
256 */
257static irqreturn_t ehci_msp_irq(struct usb_hcd *hcd)
258{
259 u32 int_src;
260 struct device *dev = hcd->self.controller;
261 struct platform_device *pdev;
262 struct mspusb_device *mdev;
263 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
264 /* need to reverse-map a couple of containers to get our device */
265 pdev = to_platform_device(dev);
266 mdev = to_mspusb_device(pdev);
267
268 /* Check to see if this interrupt is for this host controller */
269 int_src = ehci_readl(ehci, &mdev->mab_regs->int_stat);
270 if (int_src & (1 << pdev->id))
271 return ehci_irq(hcd);
272
273 /* Not for this device */
274 return IRQ_NONE;
275}
276#endif /* DUAL_USB */
277
278static const struct hc_driver ehci_msp_hc_driver = {
279 .description = hcd_name,
280 .product_desc = "PMC MSP EHCI",
281 .hcd_priv_size = sizeof(struct ehci_hcd),
282
283 /*
284 * generic hardware linkage
285 */
286#ifdef CONFIG_MSP_HAS_DUAL_USB
287 .irq = ehci_msp_irq,
288#else
289 .irq = ehci_irq,
290#endif
291 .flags = HCD_MEMORY | HCD_USB2 | HCD_BH,
292
293 /*
294 * basic lifecycle operations
295 */
296 .reset = ehci_msp_setup,
297 .shutdown = ehci_shutdown,
298 .start = ehci_run,
299 .stop = ehci_stop,
300
301 /*
302 * managing i/o requests and associated device resources
303 */
304 .urb_enqueue = ehci_urb_enqueue,
305 .urb_dequeue = ehci_urb_dequeue,
306 .endpoint_disable = ehci_endpoint_disable,
307 .endpoint_reset = ehci_endpoint_reset,
308
309 /*
310 * scheduling support
311 */
312 .get_frame_number = ehci_get_frame,
313
314 /*
315 * root hub support
316 */
317 .hub_status_data = ehci_hub_status_data,
318 .hub_control = ehci_hub_control,
319 .bus_suspend = ehci_bus_suspend,
320 .bus_resume = ehci_bus_resume,
321 .relinquish_port = ehci_relinquish_port,
322 .port_handed_over = ehci_port_handed_over,
323
324 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
325};
326
327static int ehci_hcd_msp_drv_probe(struct platform_device *pdev)
328{
329 int ret;
330
331 pr_debug("In ehci_hcd_msp_drv_probe");
332
333 if (usb_disabled())
334 return -ENODEV;
335
336 gpio_request(MSP_PIN_USB0_HOST_DEV, "USB0_HOST_DEV_GPIO");
337#ifdef CONFIG_MSP_HAS_DUAL_USB
338 gpio_request(MSP_PIN_USB1_HOST_DEV, "USB1_HOST_DEV_GPIO");
339#endif
340
341 ret = usb_hcd_msp_probe(&ehci_msp_hc_driver, pdev);
342
343 return ret;
344}
345
346static int ehci_hcd_msp_drv_remove(struct platform_device *pdev)
347{
348 struct usb_hcd *hcd = platform_get_drvdata(pdev);
349
350 usb_hcd_msp_remove(hcd, pdev);
351
352 /* free TWI GPIO USB_HOST_DEV pin */
353 gpio_free(MSP_PIN_USB0_HOST_DEV);
354#ifdef CONFIG_MSP_HAS_DUAL_USB
355 gpio_free(MSP_PIN_USB1_HOST_DEV);
356#endif
357
358 return 0;
359}
360
361MODULE_ALIAS("pmcmsp-ehci");
362
363static struct platform_driver ehci_hcd_msp_driver = {
364 .probe = ehci_hcd_msp_drv_probe,
365 .remove = ehci_hcd_msp_drv_remove,
366 .driver = {
367 .name = "pmcmsp-ehci",
368 .owner = THIS_MODULE,
369 },
370};