Commit | Line | Data |
---|---|---|
22ced687 A |
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 | ||
43 | static 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 */ | |
77 | static int ehci_msp_setup(struct usb_hcd *hcd) | |
78 | { | |
79 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
80 | int retval; | |
1a49e2ac | 81 | |
22ced687 A |
82 | ehci->big_endian_mmio = 1; |
83 | ehci->big_endian_desc = 1; | |
84 | ||
85 | ehci->caps = hcd->regs; | |
22ced687 A |
86 | hcd->has_tt = 1; |
87 | ||
1a49e2ac | 88 | retval = ehci_setup(hcd); |
22ced687 A |
89 | if (retval) |
90 | return retval; | |
91 | ||
92 | usb_hcd_tdi_set_mode(ehci); | |
22ced687 A |
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 | ||
102 | static 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; | |
28f65c11 | 113 | res_len = resource_size(res); |
22ced687 A |
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 | } | |
28f65c11 | 129 | res_len = resource_size(res); |
22ced687 A |
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; | |
141 | err3: | |
142 | res = platform_get_resource(pdev, IORESOURCE_MEM, 2); | |
28f65c11 | 143 | res_len = resource_size(res); |
22ced687 A |
144 | release_mem_region(res->start, res_len); |
145 | err2: | |
146 | iounmap(dev->mab_regs); | |
147 | err1: | |
148 | res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | |
28f65c11 | 149 | res_len = resource_size(res); |
22ced687 A |
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 | */ | |
164 | int 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; | |
28f65c11 | 183 | hcd->rsrc_len = resource_size(res); |
22ced687 A |
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 | return 0; | |
215 | ||
216 | usb_remove_hcd(hcd); | |
217 | err3: | |
218 | iounmap(hcd->regs); | |
219 | err2: | |
220 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
221 | err1: | |
222 | usb_put_hcd(hcd); | |
223 | ||
224 | return retval; | |
225 | } | |
226 | ||
227 | ||
228 | ||
229 | /** | |
230 | * usb_hcd_msp_remove - shutdown processing for PMC MSP-based HCDs | |
231 | * @dev: USB Host Controller being removed | |
232 | * Context: !in_interrupt() | |
233 | * | |
234 | * Reverses the effect of usb_hcd_msp_probe(), first invoking | |
235 | * the HCD's stop() method. It is always called from a thread | |
236 | * context, normally "rmmod", "apmd", or something similar. | |
237 | * | |
238 | * may be called without controller electrically present | |
239 | * may be called with controller, bus, and devices active | |
240 | */ | |
241 | void usb_hcd_msp_remove(struct usb_hcd *hcd, struct platform_device *dev) | |
242 | { | |
243 | usb_remove_hcd(hcd); | |
244 | iounmap(hcd->regs); | |
245 | release_mem_region(hcd->rsrc_start, hcd->rsrc_len); | |
246 | usb_put_hcd(hcd); | |
247 | } | |
248 | ||
249 | #ifdef CONFIG_MSP_HAS_DUAL_USB | |
250 | /* | |
251 | * Wrapper around the main ehci_irq. Since both USB host controllers are | |
252 | * sharing the same IRQ, need to first determine whether we're the intended | |
253 | * recipient of this interrupt. | |
254 | */ | |
255 | static irqreturn_t ehci_msp_irq(struct usb_hcd *hcd) | |
256 | { | |
257 | u32 int_src; | |
258 | struct device *dev = hcd->self.controller; | |
259 | struct platform_device *pdev; | |
260 | struct mspusb_device *mdev; | |
261 | struct ehci_hcd *ehci = hcd_to_ehci(hcd); | |
262 | /* need to reverse-map a couple of containers to get our device */ | |
263 | pdev = to_platform_device(dev); | |
264 | mdev = to_mspusb_device(pdev); | |
265 | ||
266 | /* Check to see if this interrupt is for this host controller */ | |
267 | int_src = ehci_readl(ehci, &mdev->mab_regs->int_stat); | |
268 | if (int_src & (1 << pdev->id)) | |
269 | return ehci_irq(hcd); | |
270 | ||
271 | /* Not for this device */ | |
272 | return IRQ_NONE; | |
273 | } | |
274 | #endif /* DUAL_USB */ | |
275 | ||
276 | static const struct hc_driver ehci_msp_hc_driver = { | |
277 | .description = hcd_name, | |
278 | .product_desc = "PMC MSP EHCI", | |
279 | .hcd_priv_size = sizeof(struct ehci_hcd), | |
280 | ||
281 | /* | |
282 | * generic hardware linkage | |
283 | */ | |
284 | #ifdef CONFIG_MSP_HAS_DUAL_USB | |
285 | .irq = ehci_msp_irq, | |
286 | #else | |
287 | .irq = ehci_irq, | |
288 | #endif | |
3b8d7321 | 289 | .flags = HCD_MEMORY | HCD_USB2, |
22ced687 A |
290 | |
291 | /* | |
292 | * basic lifecycle operations | |
293 | */ | |
a3b0f9b9 | 294 | .reset = ehci_msp_setup, |
22ced687 A |
295 | .shutdown = ehci_shutdown, |
296 | .start = ehci_run, | |
297 | .stop = ehci_stop, | |
298 | ||
299 | /* | |
300 | * managing i/o requests and associated device resources | |
301 | */ | |
302 | .urb_enqueue = ehci_urb_enqueue, | |
303 | .urb_dequeue = ehci_urb_dequeue, | |
304 | .endpoint_disable = ehci_endpoint_disable, | |
305 | .endpoint_reset = ehci_endpoint_reset, | |
306 | ||
307 | /* | |
308 | * scheduling support | |
309 | */ | |
310 | .get_frame_number = ehci_get_frame, | |
311 | ||
312 | /* | |
313 | * root hub support | |
314 | */ | |
315 | .hub_status_data = ehci_hub_status_data, | |
316 | .hub_control = ehci_hub_control, | |
317 | .bus_suspend = ehci_bus_suspend, | |
318 | .bus_resume = ehci_bus_resume, | |
319 | .relinquish_port = ehci_relinquish_port, | |
320 | .port_handed_over = ehci_port_handed_over, | |
321 | ||
322 | .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, | |
323 | }; | |
324 | ||
325 | static int ehci_hcd_msp_drv_probe(struct platform_device *pdev) | |
326 | { | |
327 | int ret; | |
328 | ||
329 | pr_debug("In ehci_hcd_msp_drv_probe"); | |
330 | ||
331 | if (usb_disabled()) | |
332 | return -ENODEV; | |
333 | ||
334 | gpio_request(MSP_PIN_USB0_HOST_DEV, "USB0_HOST_DEV_GPIO"); | |
335 | #ifdef CONFIG_MSP_HAS_DUAL_USB | |
336 | gpio_request(MSP_PIN_USB1_HOST_DEV, "USB1_HOST_DEV_GPIO"); | |
337 | #endif | |
338 | ||
339 | ret = usb_hcd_msp_probe(&ehci_msp_hc_driver, pdev); | |
340 | ||
341 | return ret; | |
342 | } | |
343 | ||
344 | static int ehci_hcd_msp_drv_remove(struct platform_device *pdev) | |
345 | { | |
346 | struct usb_hcd *hcd = platform_get_drvdata(pdev); | |
347 | ||
348 | usb_hcd_msp_remove(hcd, pdev); | |
349 | ||
350 | /* free TWI GPIO USB_HOST_DEV pin */ | |
351 | gpio_free(MSP_PIN_USB0_HOST_DEV); | |
352 | #ifdef CONFIG_MSP_HAS_DUAL_USB | |
353 | gpio_free(MSP_PIN_USB1_HOST_DEV); | |
354 | #endif | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | MODULE_ALIAS("pmcmsp-ehci"); | |
360 | ||
361 | static struct platform_driver ehci_hcd_msp_driver = { | |
362 | .probe = ehci_hcd_msp_drv_probe, | |
363 | .remove = ehci_hcd_msp_drv_remove, | |
364 | .driver = { | |
365 | .name = "pmcmsp-ehci", | |
366 | .owner = THIS_MODULE, | |
367 | }, | |
368 | }; |