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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
e9b29ffc PK |
2 | /* |
3 | * c67x00-hcd.c: Cypress C67X00 USB Host Controller Driver | |
4 | * | |
5 | * Copyright (C) 2006-2008 Barco N.V. | |
6 | * Derived from the Cypress cy7c67200/300 ezusb linux driver and | |
7 | * based on multiple host controller drivers inside the linux kernel. | |
e9b29ffc PK |
8 | */ |
9 | ||
10 | #include <linux/device.h> | |
11 | #include <linux/platform_device.h> | |
12 | #include <linux/usb.h> | |
13 | ||
14 | #include "c67x00.h" | |
15 | #include "c67x00-hcd.h" | |
16 | ||
17 | /* -------------------------------------------------------------------------- | |
18 | * Root Hub Support | |
19 | */ | |
20 | ||
21 | static __u8 c67x00_hub_des[] = { | |
22 | 0x09, /* __u8 bLength; */ | |
e27465f5 | 23 | USB_DT_HUB, /* __u8 bDescriptorType; Hub-descriptor */ |
e9b29ffc PK |
24 | 0x02, /* __u8 bNbrPorts; */ |
25 | 0x00, /* __u16 wHubCharacteristics; */ | |
26 | 0x00, /* (per-port OC, no power switching) */ | |
27 | 0x32, /* __u8 bPwrOn2pwrGood; 2ms */ | |
28 | 0x00, /* __u8 bHubContrCurrent; 0 mA */ | |
29 | 0x00, /* __u8 DeviceRemovable; ** 7 Ports max ** */ | |
30 | 0xff, /* __u8 PortPwrCtrlMask; ** 7 ports max ** */ | |
31 | }; | |
32 | ||
33 | static void c67x00_hub_reset_host_port(struct c67x00_sie *sie, int port) | |
34 | { | |
35 | struct c67x00_hcd *c67x00 = sie->private_data; | |
36 | unsigned long flags; | |
37 | ||
38 | c67x00_ll_husb_reset(sie, port); | |
39 | ||
40 | spin_lock_irqsave(&c67x00->lock, flags); | |
41 | c67x00_ll_husb_reset_port(sie, port); | |
42 | spin_unlock_irqrestore(&c67x00->lock, flags); | |
43 | ||
44 | c67x00_ll_set_husb_eot(sie->dev, DEFAULT_EOT); | |
45 | } | |
46 | ||
47 | static int c67x00_hub_status_data(struct usb_hcd *hcd, char *buf) | |
48 | { | |
49 | struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd); | |
50 | struct c67x00_sie *sie = c67x00->sie; | |
51 | u16 status; | |
52 | int i; | |
53 | ||
54 | *buf = 0; | |
55 | status = c67x00_ll_usb_get_status(sie); | |
56 | for (i = 0; i < C67X00_PORTS; i++) | |
57 | if (status & PORT_CONNECT_CHANGE(i)) | |
58 | *buf |= (1 << i); | |
59 | ||
60 | /* bit 0 denotes hub change, b1..n port change */ | |
61 | *buf <<= 1; | |
62 | ||
63 | return !!*buf; | |
64 | } | |
65 | ||
66 | static int c67x00_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
67 | u16 wIndex, char *buf, u16 wLength) | |
68 | { | |
69 | struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd); | |
70 | struct c67x00_sie *sie = c67x00->sie; | |
71 | u16 status, usb_status; | |
72 | int len = 0; | |
73 | unsigned int port = wIndex-1; | |
74 | u16 wPortChange, wPortStatus; | |
75 | ||
76 | switch (typeReq) { | |
77 | ||
78 | case GetHubStatus: | |
79 | *(__le32 *) buf = cpu_to_le32(0); | |
80 | len = 4; /* hub power */ | |
81 | break; | |
82 | ||
83 | case GetPortStatus: | |
84 | if (wIndex > C67X00_PORTS) | |
85 | return -EPIPE; | |
86 | ||
87 | status = c67x00_ll_usb_get_status(sie); | |
88 | usb_status = c67x00_ll_get_usb_ctl(sie); | |
89 | ||
90 | wPortChange = 0; | |
91 | if (status & PORT_CONNECT_CHANGE(port)) | |
92 | wPortChange |= USB_PORT_STAT_C_CONNECTION; | |
93 | ||
94 | wPortStatus = USB_PORT_STAT_POWER; | |
95 | if (!(status & PORT_SE0_STATUS(port))) | |
96 | wPortStatus |= USB_PORT_STAT_CONNECTION; | |
97 | if (usb_status & LOW_SPEED_PORT(port)) { | |
98 | wPortStatus |= USB_PORT_STAT_LOW_SPEED; | |
99 | c67x00->low_speed_ports |= (1 << port); | |
100 | } else | |
101 | c67x00->low_speed_ports &= ~(1 << port); | |
102 | ||
103 | if (usb_status & SOF_EOP_EN(port)) | |
104 | wPortStatus |= USB_PORT_STAT_ENABLE; | |
105 | ||
106 | *(__le16 *) buf = cpu_to_le16(wPortStatus); | |
107 | *(__le16 *) (buf + 2) = cpu_to_le16(wPortChange); | |
108 | len = 4; | |
109 | break; | |
110 | ||
111 | case SetHubFeature: /* We don't implement these */ | |
112 | case ClearHubFeature: | |
113 | switch (wValue) { | |
114 | case C_HUB_OVER_CURRENT: | |
115 | case C_HUB_LOCAL_POWER: | |
116 | len = 0; | |
117 | break; | |
118 | ||
119 | default: | |
120 | return -EPIPE; | |
121 | } | |
122 | break; | |
123 | ||
124 | case SetPortFeature: | |
125 | if (wIndex > C67X00_PORTS) | |
126 | return -EPIPE; | |
127 | ||
128 | switch (wValue) { | |
129 | case USB_PORT_FEAT_SUSPEND: | |
130 | dev_dbg(c67x00_hcd_dev(c67x00), | |
131 | "SetPortFeature %d (SUSPEND)\n", port); | |
132 | len = 0; | |
133 | break; | |
134 | ||
135 | case USB_PORT_FEAT_RESET: | |
136 | c67x00_hub_reset_host_port(sie, port); | |
137 | len = 0; | |
138 | break; | |
139 | ||
140 | case USB_PORT_FEAT_POWER: | |
141 | /* Power always enabled */ | |
142 | len = 0; | |
143 | break; | |
144 | ||
145 | default: | |
146 | dev_dbg(c67x00_hcd_dev(c67x00), | |
147 | "%s: SetPortFeature %d (0x%04x) Error!\n", | |
148 | __func__, port, wValue); | |
149 | return -EPIPE; | |
150 | } | |
151 | break; | |
152 | ||
153 | case ClearPortFeature: | |
154 | if (wIndex > C67X00_PORTS) | |
155 | return -EPIPE; | |
156 | ||
157 | switch (wValue) { | |
158 | case USB_PORT_FEAT_ENABLE: | |
159 | /* Reset the port so that the c67x00 also notices the | |
160 | * disconnect */ | |
161 | c67x00_hub_reset_host_port(sie, port); | |
162 | len = 0; | |
163 | break; | |
164 | ||
165 | case USB_PORT_FEAT_C_ENABLE: | |
166 | dev_dbg(c67x00_hcd_dev(c67x00), | |
167 | "ClearPortFeature (%d): C_ENABLE\n", port); | |
168 | len = 0; | |
169 | break; | |
170 | ||
171 | case USB_PORT_FEAT_SUSPEND: | |
172 | dev_dbg(c67x00_hcd_dev(c67x00), | |
173 | "ClearPortFeature (%d): SUSPEND\n", port); | |
174 | len = 0; | |
175 | break; | |
176 | ||
177 | case USB_PORT_FEAT_C_SUSPEND: | |
178 | dev_dbg(c67x00_hcd_dev(c67x00), | |
179 | "ClearPortFeature (%d): C_SUSPEND\n", port); | |
180 | len = 0; | |
181 | break; | |
182 | ||
183 | case USB_PORT_FEAT_POWER: | |
184 | dev_dbg(c67x00_hcd_dev(c67x00), | |
185 | "ClearPortFeature (%d): POWER\n", port); | |
186 | return -EPIPE; | |
187 | ||
188 | case USB_PORT_FEAT_C_CONNECTION: | |
189 | c67x00_ll_usb_clear_status(sie, | |
190 | PORT_CONNECT_CHANGE(port)); | |
191 | len = 0; | |
192 | break; | |
193 | ||
194 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
195 | dev_dbg(c67x00_hcd_dev(c67x00), | |
196 | "ClearPortFeature (%d): OVER_CURRENT\n", port); | |
197 | len = 0; | |
198 | break; | |
199 | ||
200 | case USB_PORT_FEAT_C_RESET: | |
201 | dev_dbg(c67x00_hcd_dev(c67x00), | |
202 | "ClearPortFeature (%d): C_RESET\n", port); | |
203 | len = 0; | |
204 | break; | |
205 | ||
206 | default: | |
207 | dev_dbg(c67x00_hcd_dev(c67x00), | |
208 | "%s: ClearPortFeature %d (0x%04x) Error!\n", | |
209 | __func__, port, wValue); | |
210 | return -EPIPE; | |
211 | } | |
212 | break; | |
213 | ||
214 | case GetHubDescriptor: | |
215 | len = min_t(unsigned int, sizeof(c67x00_hub_des), wLength); | |
216 | memcpy(buf, c67x00_hub_des, len); | |
217 | break; | |
218 | ||
219 | default: | |
220 | dev_dbg(c67x00_hcd_dev(c67x00), "%s: unknown\n", __func__); | |
221 | return -EPIPE; | |
222 | } | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | /* --------------------------------------------------------------------- | |
228 | * Main part of host controller driver | |
229 | */ | |
230 | ||
e606c759 | 231 | /* |
e9b29ffc PK |
232 | * c67x00_hcd_irq |
233 | * | |
234 | * This function is called from the interrupt handler in c67x00-drv.c | |
235 | */ | |
236 | static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg) | |
237 | { | |
238 | struct c67x00_hcd *c67x00 = sie->private_data; | |
239 | struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00); | |
240 | ||
241 | /* Handle sie message flags */ | |
242 | if (msg) { | |
243 | if (msg & HUSB_TDListDone) | |
244 | c67x00_sched_kick(c67x00); | |
245 | else | |
246 | dev_warn(c67x00_hcd_dev(c67x00), | |
247 | "Unknown SIE msg flag(s): 0x%04x\n", msg); | |
248 | } | |
249 | ||
250 | if (unlikely(hcd->state == HC_STATE_HALT)) | |
251 | return; | |
252 | ||
541c7d43 | 253 | if (!HCD_HW_ACCESSIBLE(hcd)) |
e9b29ffc PK |
254 | return; |
255 | ||
256 | /* Handle Start of frame events */ | |
257 | if (int_status & SOFEOP_FLG(sie->sie_num)) { | |
258 | c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG); | |
259 | c67x00_sched_kick(c67x00); | |
e9b29ffc PK |
260 | } |
261 | } | |
262 | ||
e606c759 | 263 | /* |
e9b29ffc PK |
264 | * c67x00_hcd_start: Host controller start hook |
265 | */ | |
266 | static int c67x00_hcd_start(struct usb_hcd *hcd) | |
267 | { | |
268 | hcd->uses_new_polling = 1; | |
269 | hcd->state = HC_STATE_RUNNING; | |
541c7d43 | 270 | set_bit(HCD_FLAG_POLL_RH, &hcd->flags); |
e9b29ffc PK |
271 | |
272 | return 0; | |
273 | } | |
274 | ||
e606c759 | 275 | /* |
e9b29ffc PK |
276 | * c67x00_hcd_stop: Host controller stop hook |
277 | */ | |
278 | static void c67x00_hcd_stop(struct usb_hcd *hcd) | |
279 | { | |
280 | /* Nothing to do */ | |
281 | } | |
282 | ||
283 | static int c67x00_hcd_get_frame(struct usb_hcd *hcd) | |
284 | { | |
285 | struct c67x00_hcd *c67x00 = hcd_to_c67x00_hcd(hcd); | |
286 | u16 temp_val; | |
287 | ||
288 | dev_dbg(c67x00_hcd_dev(c67x00), "%s\n", __func__); | |
289 | temp_val = c67x00_ll_husb_get_frame(c67x00->sie); | |
290 | temp_val &= HOST_FRAME_MASK; | |
291 | return temp_val ? (temp_val - 1) : HOST_FRAME_MASK; | |
292 | } | |
293 | ||
e978e9b9 | 294 | static const struct hc_driver c67x00_hc_driver = { |
e9b29ffc PK |
295 | .description = "c67x00-hcd", |
296 | .product_desc = "Cypress C67X00 Host Controller", | |
297 | .hcd_priv_size = sizeof(struct c67x00_hcd), | |
298 | .flags = HCD_USB11 | HCD_MEMORY, | |
299 | ||
300 | /* | |
301 | * basic lifecycle operations | |
302 | */ | |
303 | .start = c67x00_hcd_start, | |
304 | .stop = c67x00_hcd_stop, | |
305 | ||
306 | /* | |
307 | * managing i/o requests and associated device resources | |
308 | */ | |
309 | .urb_enqueue = c67x00_urb_enqueue, | |
310 | .urb_dequeue = c67x00_urb_dequeue, | |
311 | .endpoint_disable = c67x00_endpoint_disable, | |
312 | ||
313 | /* | |
314 | * scheduling support | |
315 | */ | |
316 | .get_frame_number = c67x00_hcd_get_frame, | |
317 | ||
318 | /* | |
319 | * root hub support | |
320 | */ | |
321 | .hub_status_data = c67x00_hub_status_data, | |
322 | .hub_control = c67x00_hub_control, | |
323 | }; | |
324 | ||
325 | /* --------------------------------------------------------------------- | |
326 | * Setup/Teardown routines | |
327 | */ | |
328 | ||
329 | int c67x00_hcd_probe(struct c67x00_sie *sie) | |
330 | { | |
331 | struct c67x00_hcd *c67x00; | |
332 | struct usb_hcd *hcd; | |
333 | unsigned long flags; | |
334 | int retval; | |
335 | ||
336 | if (usb_disabled()) | |
337 | return -ENODEV; | |
338 | ||
339 | hcd = usb_create_hcd(&c67x00_hc_driver, sie_dev(sie), "c67x00_sie"); | |
340 | if (!hcd) { | |
341 | retval = -ENOMEM; | |
342 | goto err0; | |
343 | } | |
344 | c67x00 = hcd_to_c67x00_hcd(hcd); | |
345 | ||
346 | spin_lock_init(&c67x00->lock); | |
347 | c67x00->sie = sie; | |
348 | ||
349 | INIT_LIST_HEAD(&c67x00->list[PIPE_ISOCHRONOUS]); | |
350 | INIT_LIST_HEAD(&c67x00->list[PIPE_INTERRUPT]); | |
351 | INIT_LIST_HEAD(&c67x00->list[PIPE_CONTROL]); | |
352 | INIT_LIST_HEAD(&c67x00->list[PIPE_BULK]); | |
353 | c67x00->urb_count = 0; | |
354 | INIT_LIST_HEAD(&c67x00->td_list); | |
355 | c67x00->td_base_addr = CY_HCD_BUF_ADDR + SIE_TD_OFFSET(sie->sie_num); | |
356 | c67x00->buf_base_addr = CY_HCD_BUF_ADDR + SIE_BUF_OFFSET(sie->sie_num); | |
357 | c67x00->max_frame_bw = MAX_FRAME_BW_STD; | |
358 | ||
359 | c67x00_ll_husb_init_host_port(sie); | |
360 | ||
361 | init_completion(&c67x00->endpoint_disable); | |
362 | retval = c67x00_sched_start_scheduler(c67x00); | |
363 | if (retval) | |
364 | goto err1; | |
365 | ||
366 | retval = usb_add_hcd(hcd, 0, 0); | |
367 | if (retval) { | |
368 | dev_dbg(sie_dev(sie), "%s: usb_add_hcd returned %d\n", | |
369 | __func__, retval); | |
370 | goto err2; | |
371 | } | |
372 | ||
3c9740a1 PC |
373 | device_wakeup_enable(hcd->self.controller); |
374 | ||
e9b29ffc PK |
375 | spin_lock_irqsave(&sie->lock, flags); |
376 | sie->private_data = c67x00; | |
377 | sie->irq = c67x00_hcd_irq; | |
378 | spin_unlock_irqrestore(&sie->lock, flags); | |
379 | ||
380 | return retval; | |
381 | ||
382 | err2: | |
383 | c67x00_sched_stop_scheduler(c67x00); | |
384 | err1: | |
385 | usb_put_hcd(hcd); | |
386 | err0: | |
387 | return retval; | |
388 | } | |
389 | ||
390 | /* may be called with controller, bus, and devices active */ | |
391 | void c67x00_hcd_remove(struct c67x00_sie *sie) | |
392 | { | |
393 | struct c67x00_hcd *c67x00 = sie->private_data; | |
394 | struct usb_hcd *hcd = c67x00_hcd_to_hcd(c67x00); | |
395 | ||
396 | c67x00_sched_stop_scheduler(c67x00); | |
397 | usb_remove_hcd(hcd); | |
398 | usb_put_hcd(hcd); | |
399 | } |