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1 | /* | |
2 | * xHCI host controller driver | |
3 | * | |
4 | * Copyright (C) 2008 Intel Corp. | |
5 | * | |
6 | * Author: Sarah Sharp | |
7 | * Some code borrowed from the Linux EHCI driver. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | * for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software Foundation, | |
20 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | #include <asm/unaligned.h> | |
24 | ||
25 | #include "xhci.h" | |
26 | ||
27 | #define PORT_WAKE_BITS (PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E) | |
28 | #define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \ | |
29 | PORT_RC | PORT_PLC | PORT_PE) | |
30 | ||
31 | static void xhci_common_hub_descriptor(struct xhci_hcd *xhci, | |
32 | struct usb_hub_descriptor *desc, int ports) | |
33 | { | |
34 | u16 temp; | |
35 | ||
36 | desc->bPwrOn2PwrGood = 10; /* xhci section 5.4.9 says 20ms max */ | |
37 | desc->bHubContrCurrent = 0; | |
38 | ||
39 | desc->bNbrPorts = ports; | |
40 | /* Ugh, these should be #defines, FIXME */ | |
41 | /* Using table 11-13 in USB 2.0 spec. */ | |
42 | temp = 0; | |
43 | /* Bits 1:0 - support port power switching, or power always on */ | |
44 | if (HCC_PPC(xhci->hcc_params)) | |
45 | temp |= 0x0001; | |
46 | else | |
47 | temp |= 0x0002; | |
48 | /* Bit 2 - root hubs are not part of a compound device */ | |
49 | /* Bits 4:3 - individual port over current protection */ | |
50 | temp |= 0x0008; | |
51 | /* Bits 6:5 - no TTs in root ports */ | |
52 | /* Bit 7 - no port indicators */ | |
53 | desc->wHubCharacteristics = (__force __u16) cpu_to_le16(temp); | |
54 | } | |
55 | ||
56 | /* Fill in the USB 2.0 roothub descriptor */ | |
57 | static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, | |
58 | struct usb_hub_descriptor *desc) | |
59 | { | |
60 | int ports; | |
61 | u16 temp; | |
62 | __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8]; | |
63 | u32 portsc; | |
64 | unsigned int i; | |
65 | ||
66 | ports = xhci->num_usb2_ports; | |
67 | ||
68 | xhci_common_hub_descriptor(xhci, desc, ports); | |
69 | desc->bDescriptorType = 0x29; | |
70 | temp = 1 + (ports / 8); | |
71 | desc->bDescLength = 7 + 2 * temp; | |
72 | ||
73 | /* The Device Removable bits are reported on a byte granularity. | |
74 | * If the port doesn't exist within that byte, the bit is set to 0. | |
75 | */ | |
76 | memset(port_removable, 0, sizeof(port_removable)); | |
77 | for (i = 0; i < ports; i++) { | |
78 | portsc = xhci_readl(xhci, xhci->usb3_ports[i]); | |
79 | /* If a device is removable, PORTSC reports a 0, same as in the | |
80 | * hub descriptor DeviceRemovable bits. | |
81 | */ | |
82 | if (portsc & PORT_DEV_REMOVE) | |
83 | /* This math is hairy because bit 0 of DeviceRemovable | |
84 | * is reserved, and bit 1 is for port 1, etc. | |
85 | */ | |
86 | port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8); | |
87 | } | |
88 | ||
89 | /* ch11.h defines a hub descriptor that has room for USB_MAXCHILDREN | |
90 | * ports on it. The USB 2.0 specification says that there are two | |
91 | * variable length fields at the end of the hub descriptor: | |
92 | * DeviceRemovable and PortPwrCtrlMask. But since we can have less than | |
93 | * USB_MAXCHILDREN ports, we may need to use the DeviceRemovable array | |
94 | * to set PortPwrCtrlMask bits. PortPwrCtrlMask must always be set to | |
95 | * 0xFF, so we initialize the both arrays (DeviceRemovable and | |
96 | * PortPwrCtrlMask) to 0xFF. Then we set the DeviceRemovable for each | |
97 | * set of ports that actually exist. | |
98 | */ | |
99 | memset(desc->u.hs.DeviceRemovable, 0xff, | |
100 | sizeof(desc->u.hs.DeviceRemovable)); | |
101 | memset(desc->u.hs.PortPwrCtrlMask, 0xff, | |
102 | sizeof(desc->u.hs.PortPwrCtrlMask)); | |
103 | ||
104 | for (i = 0; i < (ports + 1 + 7) / 8; i++) | |
105 | memset(&desc->u.hs.DeviceRemovable[i], port_removable[i], | |
106 | sizeof(__u8)); | |
107 | } | |
108 | ||
109 | /* Fill in the USB 3.0 roothub descriptor */ | |
110 | static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, | |
111 | struct usb_hub_descriptor *desc) | |
112 | { | |
113 | int ports; | |
114 | u16 port_removable; | |
115 | u32 portsc; | |
116 | unsigned int i; | |
117 | ||
118 | ports = xhci->num_usb3_ports; | |
119 | xhci_common_hub_descriptor(xhci, desc, ports); | |
120 | desc->bDescriptorType = 0x2a; | |
121 | desc->bDescLength = 12; | |
122 | ||
123 | /* header decode latency should be zero for roothubs, | |
124 | * see section 4.23.5.2. | |
125 | */ | |
126 | desc->u.ss.bHubHdrDecLat = 0; | |
127 | desc->u.ss.wHubDelay = 0; | |
128 | ||
129 | port_removable = 0; | |
130 | /* bit 0 is reserved, bit 1 is for port 1, etc. */ | |
131 | for (i = 0; i < ports; i++) { | |
132 | portsc = xhci_readl(xhci, xhci->usb3_ports[i]); | |
133 | if (portsc & PORT_DEV_REMOVE) | |
134 | port_removable |= 1 << (i + 1); | |
135 | } | |
136 | memset(&desc->u.ss.DeviceRemovable, | |
137 | (__force __u16) cpu_to_le16(port_removable), | |
138 | sizeof(__u16)); | |
139 | } | |
140 | ||
141 | static void xhci_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, | |
142 | struct usb_hub_descriptor *desc) | |
143 | { | |
144 | ||
145 | if (hcd->speed == HCD_USB3) | |
146 | xhci_usb3_hub_descriptor(hcd, xhci, desc); | |
147 | else | |
148 | xhci_usb2_hub_descriptor(hcd, xhci, desc); | |
149 | ||
150 | } | |
151 | ||
152 | static unsigned int xhci_port_speed(unsigned int port_status) | |
153 | { | |
154 | if (DEV_LOWSPEED(port_status)) | |
155 | return USB_PORT_STAT_LOW_SPEED; | |
156 | if (DEV_HIGHSPEED(port_status)) | |
157 | return USB_PORT_STAT_HIGH_SPEED; | |
158 | /* | |
159 | * FIXME: Yes, we should check for full speed, but the core uses that as | |
160 | * a default in portspeed() in usb/core/hub.c (which is the only place | |
161 | * USB_PORT_STAT_*_SPEED is used). | |
162 | */ | |
163 | return 0; | |
164 | } | |
165 | ||
166 | /* | |
167 | * These bits are Read Only (RO) and should be saved and written to the | |
168 | * registers: 0, 3, 10:13, 30 | |
169 | * connect status, over-current status, port speed, and device removable. | |
170 | * connect status and port speed are also sticky - meaning they're in | |
171 | * the AUX well and they aren't changed by a hot, warm, or cold reset. | |
172 | */ | |
173 | #define XHCI_PORT_RO ((1<<0) | (1<<3) | (0xf<<10) | (1<<30)) | |
174 | /* | |
175 | * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit: | |
176 | * bits 5:8, 9, 14:15, 25:27 | |
177 | * link state, port power, port indicator state, "wake on" enable state | |
178 | */ | |
179 | #define XHCI_PORT_RWS ((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25)) | |
180 | /* | |
181 | * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect: | |
182 | * bit 4 (port reset) | |
183 | */ | |
184 | #define XHCI_PORT_RW1S ((1<<4)) | |
185 | /* | |
186 | * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect: | |
187 | * bits 1, 17, 18, 19, 20, 21, 22, 23 | |
188 | * port enable/disable, and | |
189 | * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports), | |
190 | * over-current, reset, link state, and L1 change | |
191 | */ | |
192 | #define XHCI_PORT_RW1CS ((1<<1) | (0x7f<<17)) | |
193 | /* | |
194 | * Bit 16 is RW, and writing a '1' to it causes the link state control to be | |
195 | * latched in | |
196 | */ | |
197 | #define XHCI_PORT_RW ((1<<16)) | |
198 | /* | |
199 | * These bits are Reserved Zero (RsvdZ) and zero should be written to them: | |
200 | * bits 2, 24, 28:31 | |
201 | */ | |
202 | #define XHCI_PORT_RZ ((1<<2) | (1<<24) | (0xf<<28)) | |
203 | ||
204 | /* | |
205 | * Given a port state, this function returns a value that would result in the | |
206 | * port being in the same state, if the value was written to the port status | |
207 | * control register. | |
208 | * Save Read Only (RO) bits and save read/write bits where | |
209 | * writing a 0 clears the bit and writing a 1 sets the bit (RWS). | |
210 | * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect. | |
211 | */ | |
212 | u32 xhci_port_state_to_neutral(u32 state) | |
213 | { | |
214 | /* Save read-only status and port state */ | |
215 | return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS); | |
216 | } | |
217 | ||
218 | /* | |
219 | * find slot id based on port number. | |
220 | * @port: The one-based port number from one of the two split roothubs. | |
221 | */ | |
222 | int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci, | |
223 | u16 port) | |
224 | { | |
225 | int slot_id; | |
226 | int i; | |
227 | enum usb_device_speed speed; | |
228 | ||
229 | slot_id = 0; | |
230 | for (i = 0; i < MAX_HC_SLOTS; i++) { | |
231 | if (!xhci->devs[i]) | |
232 | continue; | |
233 | speed = xhci->devs[i]->udev->speed; | |
234 | if (((speed == USB_SPEED_SUPER) == (hcd->speed == HCD_USB3)) | |
235 | && xhci->devs[i]->port == port) { | |
236 | slot_id = i; | |
237 | break; | |
238 | } | |
239 | } | |
240 | ||
241 | return slot_id; | |
242 | } | |
243 | ||
244 | /* | |
245 | * Stop device | |
246 | * It issues stop endpoint command for EP 0 to 30. And wait the last command | |
247 | * to complete. | |
248 | * suspend will set to 1, if suspend bit need to set in command. | |
249 | */ | |
250 | static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend) | |
251 | { | |
252 | struct xhci_virt_device *virt_dev; | |
253 | struct xhci_command *cmd; | |
254 | unsigned long flags; | |
255 | int timeleft; | |
256 | int ret; | |
257 | int i; | |
258 | ||
259 | ret = 0; | |
260 | virt_dev = xhci->devs[slot_id]; | |
261 | cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO); | |
262 | if (!cmd) { | |
263 | xhci_dbg(xhci, "Couldn't allocate command structure.\n"); | |
264 | return -ENOMEM; | |
265 | } | |
266 | ||
267 | spin_lock_irqsave(&xhci->lock, flags); | |
268 | for (i = LAST_EP_INDEX; i > 0; i--) { | |
269 | if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue) | |
270 | xhci_queue_stop_endpoint(xhci, slot_id, i, suspend); | |
271 | } | |
272 | cmd->command_trb = xhci->cmd_ring->enqueue; | |
273 | list_add_tail(&cmd->cmd_list, &virt_dev->cmd_list); | |
274 | xhci_queue_stop_endpoint(xhci, slot_id, 0, suspend); | |
275 | xhci_ring_cmd_db(xhci); | |
276 | spin_unlock_irqrestore(&xhci->lock, flags); | |
277 | ||
278 | /* Wait for last stop endpoint command to finish */ | |
279 | timeleft = wait_for_completion_interruptible_timeout( | |
280 | cmd->completion, | |
281 | USB_CTRL_SET_TIMEOUT); | |
282 | if (timeleft <= 0) { | |
283 | xhci_warn(xhci, "%s while waiting for stop endpoint command\n", | |
284 | timeleft == 0 ? "Timeout" : "Signal"); | |
285 | spin_lock_irqsave(&xhci->lock, flags); | |
286 | /* The timeout might have raced with the event ring handler, so | |
287 | * only delete from the list if the item isn't poisoned. | |
288 | */ | |
289 | if (cmd->cmd_list.next != LIST_POISON1) | |
290 | list_del(&cmd->cmd_list); | |
291 | spin_unlock_irqrestore(&xhci->lock, flags); | |
292 | ret = -ETIME; | |
293 | goto command_cleanup; | |
294 | } | |
295 | ||
296 | command_cleanup: | |
297 | xhci_free_command(xhci, cmd); | |
298 | return ret; | |
299 | } | |
300 | ||
301 | /* | |
302 | * Ring device, it rings the all doorbells unconditionally. | |
303 | */ | |
304 | void xhci_ring_device(struct xhci_hcd *xhci, int slot_id) | |
305 | { | |
306 | int i; | |
307 | ||
308 | for (i = 0; i < LAST_EP_INDEX + 1; i++) | |
309 | if (xhci->devs[slot_id]->eps[i].ring && | |
310 | xhci->devs[slot_id]->eps[i].ring->dequeue) | |
311 | xhci_ring_ep_doorbell(xhci, slot_id, i, 0); | |
312 | ||
313 | return; | |
314 | } | |
315 | ||
316 | static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci, | |
317 | u16 wIndex, u32 __iomem *addr, u32 port_status) | |
318 | { | |
319 | /* Don't allow the USB core to disable SuperSpeed ports. */ | |
320 | if (hcd->speed == HCD_USB3) { | |
321 | xhci_dbg(xhci, "Ignoring request to disable " | |
322 | "SuperSpeed port.\n"); | |
323 | return; | |
324 | } | |
325 | ||
326 | /* Write 1 to disable the port */ | |
327 | xhci_writel(xhci, port_status | PORT_PE, addr); | |
328 | port_status = xhci_readl(xhci, addr); | |
329 | xhci_dbg(xhci, "disable port, actual port %d status = 0x%x\n", | |
330 | wIndex, port_status); | |
331 | } | |
332 | ||
333 | static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue, | |
334 | u16 wIndex, u32 __iomem *addr, u32 port_status) | |
335 | { | |
336 | char *port_change_bit; | |
337 | u32 status; | |
338 | ||
339 | switch (wValue) { | |
340 | case USB_PORT_FEAT_C_RESET: | |
341 | status = PORT_RC; | |
342 | port_change_bit = "reset"; | |
343 | break; | |
344 | case USB_PORT_FEAT_C_CONNECTION: | |
345 | status = PORT_CSC; | |
346 | port_change_bit = "connect"; | |
347 | break; | |
348 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
349 | status = PORT_OCC; | |
350 | port_change_bit = "over-current"; | |
351 | break; | |
352 | case USB_PORT_FEAT_C_ENABLE: | |
353 | status = PORT_PEC; | |
354 | port_change_bit = "enable/disable"; | |
355 | break; | |
356 | case USB_PORT_FEAT_C_SUSPEND: | |
357 | status = PORT_PLC; | |
358 | port_change_bit = "suspend/resume"; | |
359 | break; | |
360 | default: | |
361 | /* Should never happen */ | |
362 | return; | |
363 | } | |
364 | /* Change bits are all write 1 to clear */ | |
365 | xhci_writel(xhci, port_status | status, addr); | |
366 | port_status = xhci_readl(xhci, addr); | |
367 | xhci_dbg(xhci, "clear port %s change, actual port %d status = 0x%x\n", | |
368 | port_change_bit, wIndex, port_status); | |
369 | } | |
370 | ||
371 | int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, | |
372 | u16 wIndex, char *buf, u16 wLength) | |
373 | { | |
374 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
375 | int ports; | |
376 | unsigned long flags; | |
377 | u32 temp, temp1, status; | |
378 | int retval = 0; | |
379 | u32 __iomem **port_array; | |
380 | int slot_id; | |
381 | struct xhci_bus_state *bus_state; | |
382 | ||
383 | if (hcd->speed == HCD_USB3) { | |
384 | ports = xhci->num_usb3_ports; | |
385 | port_array = xhci->usb3_ports; | |
386 | } else { | |
387 | ports = xhci->num_usb2_ports; | |
388 | port_array = xhci->usb2_ports; | |
389 | } | |
390 | bus_state = &xhci->bus_state[hcd_index(hcd)]; | |
391 | ||
392 | spin_lock_irqsave(&xhci->lock, flags); | |
393 | switch (typeReq) { | |
394 | case GetHubStatus: | |
395 | /* No power source, over-current reported per port */ | |
396 | memset(buf, 0, 4); | |
397 | break; | |
398 | case GetHubDescriptor: | |
399 | /* Check to make sure userspace is asking for the USB 3.0 hub | |
400 | * descriptor for the USB 3.0 roothub. If not, we stall the | |
401 | * endpoint, like external hubs do. | |
402 | */ | |
403 | if (hcd->speed == HCD_USB3 && | |
404 | (wLength < USB_DT_SS_HUB_SIZE || | |
405 | wValue != (USB_DT_SS_HUB << 8))) { | |
406 | xhci_dbg(xhci, "Wrong hub descriptor type for " | |
407 | "USB 3.0 roothub.\n"); | |
408 | goto error; | |
409 | } | |
410 | xhci_hub_descriptor(hcd, xhci, | |
411 | (struct usb_hub_descriptor *) buf); | |
412 | break; | |
413 | case GetPortStatus: | |
414 | if (!wIndex || wIndex > ports) | |
415 | goto error; | |
416 | wIndex--; | |
417 | status = 0; | |
418 | temp = xhci_readl(xhci, port_array[wIndex]); | |
419 | if (temp == 0xffffffff) { | |
420 | retval = -ENODEV; | |
421 | break; | |
422 | } | |
423 | xhci_dbg(xhci, "get port status, actual port %d status = 0x%x\n", wIndex, temp); | |
424 | ||
425 | /* FIXME - should we return a port status value like the USB | |
426 | * 3.0 external hubs do? | |
427 | */ | |
428 | /* wPortChange bits */ | |
429 | if (temp & PORT_CSC) | |
430 | status |= USB_PORT_STAT_C_CONNECTION << 16; | |
431 | if (temp & PORT_PEC) | |
432 | status |= USB_PORT_STAT_C_ENABLE << 16; | |
433 | if ((temp & PORT_OCC)) | |
434 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; | |
435 | /* | |
436 | * FIXME ignoring reset and USB 2.1/3.0 specific | |
437 | * changes | |
438 | */ | |
439 | if ((temp & PORT_PLS_MASK) == XDEV_U3 | |
440 | && (temp & PORT_POWER)) | |
441 | status |= 1 << USB_PORT_FEAT_SUSPEND; | |
442 | if ((temp & PORT_PLS_MASK) == XDEV_RESUME) { | |
443 | if ((temp & PORT_RESET) || !(temp & PORT_PE)) | |
444 | goto error; | |
445 | if (!DEV_SUPERSPEED(temp) && time_after_eq(jiffies, | |
446 | bus_state->resume_done[wIndex])) { | |
447 | xhci_dbg(xhci, "Resume USB2 port %d\n", | |
448 | wIndex + 1); | |
449 | bus_state->resume_done[wIndex] = 0; | |
450 | temp1 = xhci_port_state_to_neutral(temp); | |
451 | temp1 &= ~PORT_PLS_MASK; | |
452 | temp1 |= PORT_LINK_STROBE | XDEV_U0; | |
453 | xhci_writel(xhci, temp1, port_array[wIndex]); | |
454 | ||
455 | xhci_dbg(xhci, "set port %d resume\n", | |
456 | wIndex + 1); | |
457 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, | |
458 | wIndex + 1); | |
459 | if (!slot_id) { | |
460 | xhci_dbg(xhci, "slot_id is zero\n"); | |
461 | goto error; | |
462 | } | |
463 | xhci_ring_device(xhci, slot_id); | |
464 | bus_state->port_c_suspend |= 1 << wIndex; | |
465 | bus_state->suspended_ports &= ~(1 << wIndex); | |
466 | } | |
467 | } | |
468 | if ((temp & PORT_PLS_MASK) == XDEV_U0 | |
469 | && (temp & PORT_POWER) | |
470 | && (bus_state->suspended_ports & (1 << wIndex))) { | |
471 | bus_state->suspended_ports &= ~(1 << wIndex); | |
472 | bus_state->port_c_suspend |= 1 << wIndex; | |
473 | } | |
474 | if (temp & PORT_CONNECT) { | |
475 | status |= USB_PORT_STAT_CONNECTION; | |
476 | status |= xhci_port_speed(temp); | |
477 | } | |
478 | if (temp & PORT_PE) | |
479 | status |= USB_PORT_STAT_ENABLE; | |
480 | if (temp & PORT_OC) | |
481 | status |= USB_PORT_STAT_OVERCURRENT; | |
482 | if (temp & PORT_RESET) | |
483 | status |= USB_PORT_STAT_RESET; | |
484 | if (temp & PORT_POWER) | |
485 | status |= USB_PORT_STAT_POWER; | |
486 | if (bus_state->port_c_suspend & (1 << wIndex)) | |
487 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; | |
488 | xhci_dbg(xhci, "Get port status returned 0x%x\n", status); | |
489 | put_unaligned(cpu_to_le32(status), (__le32 *) buf); | |
490 | break; | |
491 | case SetPortFeature: | |
492 | wIndex &= 0xff; | |
493 | if (!wIndex || wIndex > ports) | |
494 | goto error; | |
495 | wIndex--; | |
496 | temp = xhci_readl(xhci, port_array[wIndex]); | |
497 | if (temp == 0xffffffff) { | |
498 | retval = -ENODEV; | |
499 | break; | |
500 | } | |
501 | temp = xhci_port_state_to_neutral(temp); | |
502 | /* FIXME: What new port features do we need to support? */ | |
503 | switch (wValue) { | |
504 | case USB_PORT_FEAT_SUSPEND: | |
505 | temp = xhci_readl(xhci, port_array[wIndex]); | |
506 | /* In spec software should not attempt to suspend | |
507 | * a port unless the port reports that it is in the | |
508 | * enabled (PED = ‘1’,PLS < ‘3’) state. | |
509 | */ | |
510 | if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) | |
511 | || (temp & PORT_PLS_MASK) >= XDEV_U3) { | |
512 | xhci_warn(xhci, "USB core suspending device " | |
513 | "not in U0/U1/U2.\n"); | |
514 | goto error; | |
515 | } | |
516 | ||
517 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, | |
518 | wIndex + 1); | |
519 | if (!slot_id) { | |
520 | xhci_warn(xhci, "slot_id is zero\n"); | |
521 | goto error; | |
522 | } | |
523 | /* unlock to execute stop endpoint commands */ | |
524 | spin_unlock_irqrestore(&xhci->lock, flags); | |
525 | xhci_stop_device(xhci, slot_id, 1); | |
526 | spin_lock_irqsave(&xhci->lock, flags); | |
527 | ||
528 | temp = xhci_port_state_to_neutral(temp); | |
529 | temp &= ~PORT_PLS_MASK; | |
530 | temp |= PORT_LINK_STROBE | XDEV_U3; | |
531 | xhci_writel(xhci, temp, port_array[wIndex]); | |
532 | ||
533 | spin_unlock_irqrestore(&xhci->lock, flags); | |
534 | msleep(10); /* wait device to enter */ | |
535 | spin_lock_irqsave(&xhci->lock, flags); | |
536 | ||
537 | temp = xhci_readl(xhci, port_array[wIndex]); | |
538 | bus_state->suspended_ports |= 1 << wIndex; | |
539 | break; | |
540 | case USB_PORT_FEAT_POWER: | |
541 | /* | |
542 | * Turn on ports, even if there isn't per-port switching. | |
543 | * HC will report connect events even before this is set. | |
544 | * However, khubd will ignore the roothub events until | |
545 | * the roothub is registered. | |
546 | */ | |
547 | xhci_writel(xhci, temp | PORT_POWER, | |
548 | port_array[wIndex]); | |
549 | ||
550 | temp = xhci_readl(xhci, port_array[wIndex]); | |
551 | xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n", wIndex, temp); | |
552 | break; | |
553 | case USB_PORT_FEAT_RESET: | |
554 | temp = (temp | PORT_RESET); | |
555 | xhci_writel(xhci, temp, port_array[wIndex]); | |
556 | ||
557 | temp = xhci_readl(xhci, port_array[wIndex]); | |
558 | xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp); | |
559 | break; | |
560 | default: | |
561 | goto error; | |
562 | } | |
563 | /* unblock any posted writes */ | |
564 | temp = xhci_readl(xhci, port_array[wIndex]); | |
565 | break; | |
566 | case ClearPortFeature: | |
567 | if (!wIndex || wIndex > ports) | |
568 | goto error; | |
569 | wIndex--; | |
570 | temp = xhci_readl(xhci, port_array[wIndex]); | |
571 | if (temp == 0xffffffff) { | |
572 | retval = -ENODEV; | |
573 | break; | |
574 | } | |
575 | /* FIXME: What new port features do we need to support? */ | |
576 | temp = xhci_port_state_to_neutral(temp); | |
577 | switch (wValue) { | |
578 | case USB_PORT_FEAT_SUSPEND: | |
579 | temp = xhci_readl(xhci, port_array[wIndex]); | |
580 | xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n"); | |
581 | xhci_dbg(xhci, "PORTSC %04x\n", temp); | |
582 | if (temp & PORT_RESET) | |
583 | goto error; | |
584 | if (temp & XDEV_U3) { | |
585 | if ((temp & PORT_PE) == 0) | |
586 | goto error; | |
587 | if (DEV_SUPERSPEED(temp)) { | |
588 | temp = xhci_port_state_to_neutral(temp); | |
589 | temp &= ~PORT_PLS_MASK; | |
590 | temp |= PORT_LINK_STROBE | XDEV_U0; | |
591 | xhci_writel(xhci, temp, | |
592 | port_array[wIndex]); | |
593 | xhci_readl(xhci, port_array[wIndex]); | |
594 | } else { | |
595 | temp = xhci_port_state_to_neutral(temp); | |
596 | temp &= ~PORT_PLS_MASK; | |
597 | temp |= PORT_LINK_STROBE | XDEV_RESUME; | |
598 | xhci_writel(xhci, temp, | |
599 | port_array[wIndex]); | |
600 | ||
601 | spin_unlock_irqrestore(&xhci->lock, | |
602 | flags); | |
603 | msleep(20); | |
604 | spin_lock_irqsave(&xhci->lock, flags); | |
605 | ||
606 | temp = xhci_readl(xhci, | |
607 | port_array[wIndex]); | |
608 | temp = xhci_port_state_to_neutral(temp); | |
609 | temp &= ~PORT_PLS_MASK; | |
610 | temp |= PORT_LINK_STROBE | XDEV_U0; | |
611 | xhci_writel(xhci, temp, | |
612 | port_array[wIndex]); | |
613 | } | |
614 | bus_state->port_c_suspend |= 1 << wIndex; | |
615 | } | |
616 | ||
617 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, | |
618 | wIndex + 1); | |
619 | if (!slot_id) { | |
620 | xhci_dbg(xhci, "slot_id is zero\n"); | |
621 | goto error; | |
622 | } | |
623 | xhci_ring_device(xhci, slot_id); | |
624 | break; | |
625 | case USB_PORT_FEAT_C_SUSPEND: | |
626 | bus_state->port_c_suspend &= ~(1 << wIndex); | |
627 | case USB_PORT_FEAT_C_RESET: | |
628 | case USB_PORT_FEAT_C_CONNECTION: | |
629 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
630 | case USB_PORT_FEAT_C_ENABLE: | |
631 | xhci_clear_port_change_bit(xhci, wValue, wIndex, | |
632 | port_array[wIndex], temp); | |
633 | break; | |
634 | case USB_PORT_FEAT_ENABLE: | |
635 | xhci_disable_port(hcd, xhci, wIndex, | |
636 | port_array[wIndex], temp); | |
637 | break; | |
638 | default: | |
639 | goto error; | |
640 | } | |
641 | break; | |
642 | default: | |
643 | error: | |
644 | /* "stall" on error */ | |
645 | retval = -EPIPE; | |
646 | } | |
647 | spin_unlock_irqrestore(&xhci->lock, flags); | |
648 | return retval; | |
649 | } | |
650 | ||
651 | /* | |
652 | * Returns 0 if the status hasn't changed, or the number of bytes in buf. | |
653 | * Ports are 0-indexed from the HCD point of view, | |
654 | * and 1-indexed from the USB core pointer of view. | |
655 | * | |
656 | * Note that the status change bits will be cleared as soon as a port status | |
657 | * change event is generated, so we use the saved status from that event. | |
658 | */ | |
659 | int xhci_hub_status_data(struct usb_hcd *hcd, char *buf) | |
660 | { | |
661 | unsigned long flags; | |
662 | u32 temp, status; | |
663 | u32 mask; | |
664 | int i, retval; | |
665 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
666 | int ports; | |
667 | u32 __iomem **port_array; | |
668 | struct xhci_bus_state *bus_state; | |
669 | ||
670 | if (hcd->speed == HCD_USB3) { | |
671 | ports = xhci->num_usb3_ports; | |
672 | port_array = xhci->usb3_ports; | |
673 | } else { | |
674 | ports = xhci->num_usb2_ports; | |
675 | port_array = xhci->usb2_ports; | |
676 | } | |
677 | bus_state = &xhci->bus_state[hcd_index(hcd)]; | |
678 | ||
679 | /* Initial status is no changes */ | |
680 | retval = (ports + 8) / 8; | |
681 | memset(buf, 0, retval); | |
682 | status = 0; | |
683 | ||
684 | mask = PORT_CSC | PORT_PEC | PORT_OCC; | |
685 | ||
686 | spin_lock_irqsave(&xhci->lock, flags); | |
687 | /* For each port, did anything change? If so, set that bit in buf. */ | |
688 | for (i = 0; i < ports; i++) { | |
689 | temp = xhci_readl(xhci, port_array[i]); | |
690 | if (temp == 0xffffffff) { | |
691 | retval = -ENODEV; | |
692 | break; | |
693 | } | |
694 | if ((temp & mask) != 0 || | |
695 | (bus_state->port_c_suspend & 1 << i) || | |
696 | (bus_state->resume_done[i] && time_after_eq( | |
697 | jiffies, bus_state->resume_done[i]))) { | |
698 | buf[(i + 1) / 8] |= 1 << (i + 1) % 8; | |
699 | status = 1; | |
700 | } | |
701 | } | |
702 | spin_unlock_irqrestore(&xhci->lock, flags); | |
703 | return status ? retval : 0; | |
704 | } | |
705 | ||
706 | #ifdef CONFIG_PM | |
707 | ||
708 | int xhci_bus_suspend(struct usb_hcd *hcd) | |
709 | { | |
710 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
711 | int max_ports, port_index; | |
712 | u32 __iomem **port_array; | |
713 | struct xhci_bus_state *bus_state; | |
714 | unsigned long flags; | |
715 | ||
716 | if (hcd->speed == HCD_USB3) { | |
717 | max_ports = xhci->num_usb3_ports; | |
718 | port_array = xhci->usb3_ports; | |
719 | xhci_dbg(xhci, "suspend USB 3.0 root hub\n"); | |
720 | } else { | |
721 | max_ports = xhci->num_usb2_ports; | |
722 | port_array = xhci->usb2_ports; | |
723 | xhci_dbg(xhci, "suspend USB 2.0 root hub\n"); | |
724 | } | |
725 | bus_state = &xhci->bus_state[hcd_index(hcd)]; | |
726 | ||
727 | spin_lock_irqsave(&xhci->lock, flags); | |
728 | ||
729 | if (hcd->self.root_hub->do_remote_wakeup) { | |
730 | port_index = max_ports; | |
731 | while (port_index--) { | |
732 | if (bus_state->resume_done[port_index] != 0) { | |
733 | spin_unlock_irqrestore(&xhci->lock, flags); | |
734 | xhci_dbg(xhci, "suspend failed because " | |
735 | "port %d is resuming\n", | |
736 | port_index + 1); | |
737 | return -EBUSY; | |
738 | } | |
739 | } | |
740 | } | |
741 | ||
742 | port_index = max_ports; | |
743 | bus_state->bus_suspended = 0; | |
744 | while (port_index--) { | |
745 | /* suspend the port if the port is not suspended */ | |
746 | u32 t1, t2; | |
747 | int slot_id; | |
748 | ||
749 | t1 = xhci_readl(xhci, port_array[port_index]); | |
750 | t2 = xhci_port_state_to_neutral(t1); | |
751 | ||
752 | if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) { | |
753 | xhci_dbg(xhci, "port %d not suspended\n", port_index); | |
754 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, | |
755 | port_index + 1); | |
756 | if (slot_id) { | |
757 | spin_unlock_irqrestore(&xhci->lock, flags); | |
758 | xhci_stop_device(xhci, slot_id, 1); | |
759 | spin_lock_irqsave(&xhci->lock, flags); | |
760 | } | |
761 | t2 &= ~PORT_PLS_MASK; | |
762 | t2 |= PORT_LINK_STROBE | XDEV_U3; | |
763 | set_bit(port_index, &bus_state->bus_suspended); | |
764 | } | |
765 | if (hcd->self.root_hub->do_remote_wakeup) { | |
766 | if (t1 & PORT_CONNECT) { | |
767 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
768 | t2 &= ~PORT_WKCONN_E; | |
769 | } else { | |
770 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
771 | t2 &= ~PORT_WKDISC_E; | |
772 | } | |
773 | } else | |
774 | t2 &= ~PORT_WAKE_BITS; | |
775 | ||
776 | t1 = xhci_port_state_to_neutral(t1); | |
777 | if (t1 != t2) | |
778 | xhci_writel(xhci, t2, port_array[port_index]); | |
779 | ||
780 | if (DEV_HIGHSPEED(t1)) { | |
781 | /* enable remote wake up for USB 2.0 */ | |
782 | u32 __iomem *addr; | |
783 | u32 tmp; | |
784 | ||
785 | /* Add one to the port status register address to get | |
786 | * the port power control register address. | |
787 | */ | |
788 | addr = port_array[port_index] + 1; | |
789 | tmp = xhci_readl(xhci, addr); | |
790 | tmp |= PORT_RWE; | |
791 | xhci_writel(xhci, tmp, addr); | |
792 | } | |
793 | } | |
794 | hcd->state = HC_STATE_SUSPENDED; | |
795 | bus_state->next_statechange = jiffies + msecs_to_jiffies(10); | |
796 | spin_unlock_irqrestore(&xhci->lock, flags); | |
797 | return 0; | |
798 | } | |
799 | ||
800 | int xhci_bus_resume(struct usb_hcd *hcd) | |
801 | { | |
802 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
803 | int max_ports, port_index; | |
804 | u32 __iomem **port_array; | |
805 | struct xhci_bus_state *bus_state; | |
806 | u32 temp; | |
807 | unsigned long flags; | |
808 | ||
809 | if (hcd->speed == HCD_USB3) { | |
810 | max_ports = xhci->num_usb3_ports; | |
811 | port_array = xhci->usb3_ports; | |
812 | xhci_dbg(xhci, "resume USB 3.0 root hub\n"); | |
813 | } else { | |
814 | max_ports = xhci->num_usb2_ports; | |
815 | port_array = xhci->usb2_ports; | |
816 | xhci_dbg(xhci, "resume USB 2.0 root hub\n"); | |
817 | } | |
818 | bus_state = &xhci->bus_state[hcd_index(hcd)]; | |
819 | ||
820 | if (time_before(jiffies, bus_state->next_statechange)) | |
821 | msleep(5); | |
822 | ||
823 | spin_lock_irqsave(&xhci->lock, flags); | |
824 | if (!HCD_HW_ACCESSIBLE(hcd)) { | |
825 | spin_unlock_irqrestore(&xhci->lock, flags); | |
826 | return -ESHUTDOWN; | |
827 | } | |
828 | ||
829 | /* delay the irqs */ | |
830 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
831 | temp &= ~CMD_EIE; | |
832 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
833 | ||
834 | port_index = max_ports; | |
835 | while (port_index--) { | |
836 | /* Check whether need resume ports. If needed | |
837 | resume port and disable remote wakeup */ | |
838 | u32 temp; | |
839 | int slot_id; | |
840 | ||
841 | temp = xhci_readl(xhci, port_array[port_index]); | |
842 | if (DEV_SUPERSPEED(temp)) | |
843 | temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS); | |
844 | else | |
845 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); | |
846 | if (test_bit(port_index, &bus_state->bus_suspended) && | |
847 | (temp & PORT_PLS_MASK)) { | |
848 | if (DEV_SUPERSPEED(temp)) { | |
849 | temp = xhci_port_state_to_neutral(temp); | |
850 | temp &= ~PORT_PLS_MASK; | |
851 | temp |= PORT_LINK_STROBE | XDEV_U0; | |
852 | xhci_writel(xhci, temp, port_array[port_index]); | |
853 | } else { | |
854 | temp = xhci_port_state_to_neutral(temp); | |
855 | temp &= ~PORT_PLS_MASK; | |
856 | temp |= PORT_LINK_STROBE | XDEV_RESUME; | |
857 | xhci_writel(xhci, temp, port_array[port_index]); | |
858 | ||
859 | spin_unlock_irqrestore(&xhci->lock, flags); | |
860 | msleep(20); | |
861 | spin_lock_irqsave(&xhci->lock, flags); | |
862 | ||
863 | temp = xhci_readl(xhci, port_array[port_index]); | |
864 | temp = xhci_port_state_to_neutral(temp); | |
865 | temp &= ~PORT_PLS_MASK; | |
866 | temp |= PORT_LINK_STROBE | XDEV_U0; | |
867 | xhci_writel(xhci, temp, port_array[port_index]); | |
868 | } | |
869 | slot_id = xhci_find_slot_id_by_port(hcd, | |
870 | xhci, port_index + 1); | |
871 | if (slot_id) | |
872 | xhci_ring_device(xhci, slot_id); | |
873 | } else | |
874 | xhci_writel(xhci, temp, port_array[port_index]); | |
875 | ||
876 | if (DEV_HIGHSPEED(temp)) { | |
877 | /* disable remote wake up for USB 2.0 */ | |
878 | u32 __iomem *addr; | |
879 | u32 tmp; | |
880 | ||
881 | /* Add one to the port status register address to get | |
882 | * the port power control register address. | |
883 | */ | |
884 | addr = port_array[port_index] + 1; | |
885 | tmp = xhci_readl(xhci, addr); | |
886 | tmp &= ~PORT_RWE; | |
887 | xhci_writel(xhci, tmp, addr); | |
888 | } | |
889 | } | |
890 | ||
891 | (void) xhci_readl(xhci, &xhci->op_regs->command); | |
892 | ||
893 | bus_state->next_statechange = jiffies + msecs_to_jiffies(5); | |
894 | /* re-enable irqs */ | |
895 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
896 | temp |= CMD_EIE; | |
897 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
898 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
899 | ||
900 | spin_unlock_irqrestore(&xhci->lock, flags); | |
901 | return 0; | |
902 | } | |
903 | ||
904 | #endif /* CONFIG_PM */ |