Commit | Line | Data |
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0f2a7930 SS |
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 | ||
4bcbcc96 | 23 | #include <linux/gfp.h> |
0f2a7930 SS |
24 | #include <asm/unaligned.h> |
25 | ||
26 | #include "xhci.h" | |
27 | ||
9777e3ce AX |
28 | #define PORT_WAKE_BITS (PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E) |
29 | #define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_WRC | PORT_OCC | \ | |
30 | PORT_RC | PORT_PLC | PORT_PE) | |
31 | ||
48e82361 SS |
32 | /* usb 1.1 root hub device descriptor */ |
33 | static u8 usb_bos_descriptor [] = { | |
34 | USB_DT_BOS_SIZE, /* __u8 bLength, 5 bytes */ | |
35 | USB_DT_BOS, /* __u8 bDescriptorType */ | |
36 | 0x0F, 0x00, /* __le16 wTotalLength, 15 bytes */ | |
37 | 0x1, /* __u8 bNumDeviceCaps */ | |
38 | /* First device capability */ | |
39 | USB_DT_USB_SS_CAP_SIZE, /* __u8 bLength, 10 bytes */ | |
40 | USB_DT_DEVICE_CAPABILITY, /* Device Capability */ | |
41 | USB_SS_CAP_TYPE, /* bDevCapabilityType, SUPERSPEED_USB */ | |
42 | 0x00, /* bmAttributes, LTM off by default */ | |
43 | USB_5GBPS_OPERATION, 0x00, /* wSpeedsSupported, 5Gbps only */ | |
44 | 0x03, /* bFunctionalitySupport, | |
45 | USB 3.0 speed only */ | |
46 | 0x00, /* bU1DevExitLat, set later. */ | |
47 | 0x00, 0x00 /* __le16 bU2DevExitLat, set later. */ | |
48 | }; | |
49 | ||
50 | ||
4bbb0ace SS |
51 | static void xhci_common_hub_descriptor(struct xhci_hcd *xhci, |
52 | struct usb_hub_descriptor *desc, int ports) | |
0f2a7930 | 53 | { |
0f2a7930 SS |
54 | u16 temp; |
55 | ||
0f2a7930 SS |
56 | desc->bPwrOn2PwrGood = 10; /* xhci section 5.4.9 says 20ms max */ |
57 | desc->bHubContrCurrent = 0; | |
58 | ||
59 | desc->bNbrPorts = ports; | |
0f2a7930 | 60 | temp = 0; |
c8421147 | 61 | /* Bits 1:0 - support per-port power switching, or power always on */ |
0f2a7930 | 62 | if (HCC_PPC(xhci->hcc_params)) |
c8421147 | 63 | temp |= HUB_CHAR_INDV_PORT_LPSM; |
0f2a7930 | 64 | else |
c8421147 | 65 | temp |= HUB_CHAR_NO_LPSM; |
0f2a7930 SS |
66 | /* Bit 2 - root hubs are not part of a compound device */ |
67 | /* Bits 4:3 - individual port over current protection */ | |
c8421147 | 68 | temp |= HUB_CHAR_INDV_PORT_OCPM; |
0f2a7930 SS |
69 | /* Bits 6:5 - no TTs in root ports */ |
70 | /* Bit 7 - no port indicators */ | |
28ccd296 | 71 | desc->wHubCharacteristics = cpu_to_le16(temp); |
0f2a7930 SS |
72 | } |
73 | ||
4bbb0ace SS |
74 | /* Fill in the USB 2.0 roothub descriptor */ |
75 | static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, | |
76 | struct usb_hub_descriptor *desc) | |
77 | { | |
78 | int ports; | |
79 | u16 temp; | |
80 | __u8 port_removable[(USB_MAXCHILDREN + 1 + 7) / 8]; | |
81 | u32 portsc; | |
82 | unsigned int i; | |
83 | ||
84 | ports = xhci->num_usb2_ports; | |
85 | ||
86 | xhci_common_hub_descriptor(xhci, desc, ports); | |
c8421147 | 87 | desc->bDescriptorType = USB_DT_HUB; |
4bbb0ace | 88 | temp = 1 + (ports / 8); |
c8421147 | 89 | desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp; |
4bbb0ace SS |
90 | |
91 | /* The Device Removable bits are reported on a byte granularity. | |
92 | * If the port doesn't exist within that byte, the bit is set to 0. | |
93 | */ | |
94 | memset(port_removable, 0, sizeof(port_removable)); | |
95 | for (i = 0; i < ports; i++) { | |
3278a55a | 96 | portsc = xhci_readl(xhci, xhci->usb2_ports[i]); |
4bbb0ace SS |
97 | /* If a device is removable, PORTSC reports a 0, same as in the |
98 | * hub descriptor DeviceRemovable bits. | |
99 | */ | |
100 | if (portsc & PORT_DEV_REMOVE) | |
101 | /* This math is hairy because bit 0 of DeviceRemovable | |
102 | * is reserved, and bit 1 is for port 1, etc. | |
103 | */ | |
104 | port_removable[(i + 1) / 8] |= 1 << ((i + 1) % 8); | |
105 | } | |
106 | ||
107 | /* ch11.h defines a hub descriptor that has room for USB_MAXCHILDREN | |
108 | * ports on it. The USB 2.0 specification says that there are two | |
109 | * variable length fields at the end of the hub descriptor: | |
110 | * DeviceRemovable and PortPwrCtrlMask. But since we can have less than | |
111 | * USB_MAXCHILDREN ports, we may need to use the DeviceRemovable array | |
112 | * to set PortPwrCtrlMask bits. PortPwrCtrlMask must always be set to | |
113 | * 0xFF, so we initialize the both arrays (DeviceRemovable and | |
114 | * PortPwrCtrlMask) to 0xFF. Then we set the DeviceRemovable for each | |
115 | * set of ports that actually exist. | |
116 | */ | |
117 | memset(desc->u.hs.DeviceRemovable, 0xff, | |
118 | sizeof(desc->u.hs.DeviceRemovable)); | |
119 | memset(desc->u.hs.PortPwrCtrlMask, 0xff, | |
120 | sizeof(desc->u.hs.PortPwrCtrlMask)); | |
121 | ||
122 | for (i = 0; i < (ports + 1 + 7) / 8; i++) | |
123 | memset(&desc->u.hs.DeviceRemovable[i], port_removable[i], | |
124 | sizeof(__u8)); | |
125 | } | |
126 | ||
127 | /* Fill in the USB 3.0 roothub descriptor */ | |
128 | static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, | |
129 | struct usb_hub_descriptor *desc) | |
130 | { | |
131 | int ports; | |
132 | u16 port_removable; | |
133 | u32 portsc; | |
134 | unsigned int i; | |
135 | ||
136 | ports = xhci->num_usb3_ports; | |
137 | xhci_common_hub_descriptor(xhci, desc, ports); | |
c8421147 AD |
138 | desc->bDescriptorType = USB_DT_SS_HUB; |
139 | desc->bDescLength = USB_DT_SS_HUB_SIZE; | |
4bbb0ace SS |
140 | |
141 | /* header decode latency should be zero for roothubs, | |
142 | * see section 4.23.5.2. | |
143 | */ | |
144 | desc->u.ss.bHubHdrDecLat = 0; | |
145 | desc->u.ss.wHubDelay = 0; | |
146 | ||
147 | port_removable = 0; | |
148 | /* bit 0 is reserved, bit 1 is for port 1, etc. */ | |
149 | for (i = 0; i < ports; i++) { | |
150 | portsc = xhci_readl(xhci, xhci->usb3_ports[i]); | |
151 | if (portsc & PORT_DEV_REMOVE) | |
152 | port_removable |= 1 << (i + 1); | |
153 | } | |
154 | memset(&desc->u.ss.DeviceRemovable, | |
155 | (__force __u16) cpu_to_le16(port_removable), | |
156 | sizeof(__u16)); | |
157 | } | |
158 | ||
159 | static void xhci_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci, | |
160 | struct usb_hub_descriptor *desc) | |
161 | { | |
162 | ||
163 | if (hcd->speed == HCD_USB3) | |
164 | xhci_usb3_hub_descriptor(hcd, xhci, desc); | |
165 | else | |
166 | xhci_usb2_hub_descriptor(hcd, xhci, desc); | |
167 | ||
168 | } | |
169 | ||
0f2a7930 SS |
170 | static unsigned int xhci_port_speed(unsigned int port_status) |
171 | { | |
172 | if (DEV_LOWSPEED(port_status)) | |
288ead45 | 173 | return USB_PORT_STAT_LOW_SPEED; |
0f2a7930 | 174 | if (DEV_HIGHSPEED(port_status)) |
288ead45 | 175 | return USB_PORT_STAT_HIGH_SPEED; |
0f2a7930 SS |
176 | /* |
177 | * FIXME: Yes, we should check for full speed, but the core uses that as | |
178 | * a default in portspeed() in usb/core/hub.c (which is the only place | |
288ead45 | 179 | * USB_PORT_STAT_*_SPEED is used). |
0f2a7930 SS |
180 | */ |
181 | return 0; | |
182 | } | |
183 | ||
184 | /* | |
185 | * These bits are Read Only (RO) and should be saved and written to the | |
186 | * registers: 0, 3, 10:13, 30 | |
187 | * connect status, over-current status, port speed, and device removable. | |
188 | * connect status and port speed are also sticky - meaning they're in | |
189 | * the AUX well and they aren't changed by a hot, warm, or cold reset. | |
190 | */ | |
191 | #define XHCI_PORT_RO ((1<<0) | (1<<3) | (0xf<<10) | (1<<30)) | |
192 | /* | |
193 | * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit: | |
194 | * bits 5:8, 9, 14:15, 25:27 | |
195 | * link state, port power, port indicator state, "wake on" enable state | |
196 | */ | |
197 | #define XHCI_PORT_RWS ((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25)) | |
198 | /* | |
199 | * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect: | |
200 | * bit 4 (port reset) | |
201 | */ | |
202 | #define XHCI_PORT_RW1S ((1<<4)) | |
203 | /* | |
204 | * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect: | |
205 | * bits 1, 17, 18, 19, 20, 21, 22, 23 | |
206 | * port enable/disable, and | |
207 | * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports), | |
208 | * over-current, reset, link state, and L1 change | |
209 | */ | |
210 | #define XHCI_PORT_RW1CS ((1<<1) | (0x7f<<17)) | |
211 | /* | |
212 | * Bit 16 is RW, and writing a '1' to it causes the link state control to be | |
213 | * latched in | |
214 | */ | |
215 | #define XHCI_PORT_RW ((1<<16)) | |
216 | /* | |
217 | * These bits are Reserved Zero (RsvdZ) and zero should be written to them: | |
218 | * bits 2, 24, 28:31 | |
219 | */ | |
220 | #define XHCI_PORT_RZ ((1<<2) | (1<<24) | (0xf<<28)) | |
221 | ||
222 | /* | |
223 | * Given a port state, this function returns a value that would result in the | |
224 | * port being in the same state, if the value was written to the port status | |
225 | * control register. | |
226 | * Save Read Only (RO) bits and save read/write bits where | |
227 | * writing a 0 clears the bit and writing a 1 sets the bit (RWS). | |
228 | * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect. | |
229 | */ | |
56192531 | 230 | u32 xhci_port_state_to_neutral(u32 state) |
0f2a7930 SS |
231 | { |
232 | /* Save read-only status and port state */ | |
233 | return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS); | |
234 | } | |
235 | ||
be88fe4f AX |
236 | /* |
237 | * find slot id based on port number. | |
f6ff0ac8 | 238 | * @port: The one-based port number from one of the two split roothubs. |
be88fe4f | 239 | */ |
5233630f SS |
240 | int xhci_find_slot_id_by_port(struct usb_hcd *hcd, struct xhci_hcd *xhci, |
241 | u16 port) | |
be88fe4f AX |
242 | { |
243 | int slot_id; | |
244 | int i; | |
f6ff0ac8 | 245 | enum usb_device_speed speed; |
be88fe4f AX |
246 | |
247 | slot_id = 0; | |
248 | for (i = 0; i < MAX_HC_SLOTS; i++) { | |
249 | if (!xhci->devs[i]) | |
250 | continue; | |
f6ff0ac8 SS |
251 | speed = xhci->devs[i]->udev->speed; |
252 | if (((speed == USB_SPEED_SUPER) == (hcd->speed == HCD_USB3)) | |
fe30182c | 253 | && xhci->devs[i]->fake_port == port) { |
be88fe4f AX |
254 | slot_id = i; |
255 | break; | |
256 | } | |
257 | } | |
258 | ||
259 | return slot_id; | |
260 | } | |
261 | ||
262 | /* | |
263 | * Stop device | |
264 | * It issues stop endpoint command for EP 0 to 30. And wait the last command | |
265 | * to complete. | |
266 | * suspend will set to 1, if suspend bit need to set in command. | |
267 | */ | |
268 | static int xhci_stop_device(struct xhci_hcd *xhci, int slot_id, int suspend) | |
269 | { | |
270 | struct xhci_virt_device *virt_dev; | |
271 | struct xhci_command *cmd; | |
272 | unsigned long flags; | |
273 | int timeleft; | |
274 | int ret; | |
275 | int i; | |
276 | ||
277 | ret = 0; | |
278 | virt_dev = xhci->devs[slot_id]; | |
279 | cmd = xhci_alloc_command(xhci, false, true, GFP_NOIO); | |
280 | if (!cmd) { | |
281 | xhci_dbg(xhci, "Couldn't allocate command structure.\n"); | |
282 | return -ENOMEM; | |
283 | } | |
284 | ||
285 | spin_lock_irqsave(&xhci->lock, flags); | |
286 | for (i = LAST_EP_INDEX; i > 0; i--) { | |
287 | if (virt_dev->eps[i].ring && virt_dev->eps[i].ring->dequeue) | |
288 | xhci_queue_stop_endpoint(xhci, slot_id, i, suspend); | |
289 | } | |
290 | cmd->command_trb = xhci->cmd_ring->enqueue; | |
291 | list_add_tail(&cmd->cmd_list, &virt_dev->cmd_list); | |
292 | xhci_queue_stop_endpoint(xhci, slot_id, 0, suspend); | |
293 | xhci_ring_cmd_db(xhci); | |
294 | spin_unlock_irqrestore(&xhci->lock, flags); | |
295 | ||
296 | /* Wait for last stop endpoint command to finish */ | |
297 | timeleft = wait_for_completion_interruptible_timeout( | |
298 | cmd->completion, | |
299 | USB_CTRL_SET_TIMEOUT); | |
300 | if (timeleft <= 0) { | |
301 | xhci_warn(xhci, "%s while waiting for stop endpoint command\n", | |
302 | timeleft == 0 ? "Timeout" : "Signal"); | |
303 | spin_lock_irqsave(&xhci->lock, flags); | |
304 | /* The timeout might have raced with the event ring handler, so | |
305 | * only delete from the list if the item isn't poisoned. | |
306 | */ | |
307 | if (cmd->cmd_list.next != LIST_POISON1) | |
308 | list_del(&cmd->cmd_list); | |
309 | spin_unlock_irqrestore(&xhci->lock, flags); | |
310 | ret = -ETIME; | |
311 | goto command_cleanup; | |
312 | } | |
313 | ||
314 | command_cleanup: | |
315 | xhci_free_command(xhci, cmd); | |
316 | return ret; | |
317 | } | |
318 | ||
319 | /* | |
320 | * Ring device, it rings the all doorbells unconditionally. | |
321 | */ | |
56192531 | 322 | void xhci_ring_device(struct xhci_hcd *xhci, int slot_id) |
be88fe4f AX |
323 | { |
324 | int i; | |
325 | ||
326 | for (i = 0; i < LAST_EP_INDEX + 1; i++) | |
327 | if (xhci->devs[slot_id]->eps[i].ring && | |
328 | xhci->devs[slot_id]->eps[i].ring->dequeue) | |
329 | xhci_ring_ep_doorbell(xhci, slot_id, i, 0); | |
330 | ||
331 | return; | |
332 | } | |
333 | ||
f6ff0ac8 | 334 | static void xhci_disable_port(struct usb_hcd *hcd, struct xhci_hcd *xhci, |
28ccd296 | 335 | u16 wIndex, __le32 __iomem *addr, u32 port_status) |
6219c047 | 336 | { |
6dd0a3a7 | 337 | /* Don't allow the USB core to disable SuperSpeed ports. */ |
f6ff0ac8 | 338 | if (hcd->speed == HCD_USB3) { |
6dd0a3a7 SS |
339 | xhci_dbg(xhci, "Ignoring request to disable " |
340 | "SuperSpeed port.\n"); | |
341 | return; | |
342 | } | |
343 | ||
6219c047 SS |
344 | /* Write 1 to disable the port */ |
345 | xhci_writel(xhci, port_status | PORT_PE, addr); | |
346 | port_status = xhci_readl(xhci, addr); | |
347 | xhci_dbg(xhci, "disable port, actual port %d status = 0x%x\n", | |
348 | wIndex, port_status); | |
349 | } | |
350 | ||
34fb562a | 351 | static void xhci_clear_port_change_bit(struct xhci_hcd *xhci, u16 wValue, |
28ccd296 | 352 | u16 wIndex, __le32 __iomem *addr, u32 port_status) |
34fb562a SS |
353 | { |
354 | char *port_change_bit; | |
355 | u32 status; | |
356 | ||
357 | switch (wValue) { | |
358 | case USB_PORT_FEAT_C_RESET: | |
359 | status = PORT_RC; | |
360 | port_change_bit = "reset"; | |
361 | break; | |
a11496eb AX |
362 | case USB_PORT_FEAT_C_BH_PORT_RESET: |
363 | status = PORT_WRC; | |
364 | port_change_bit = "warm(BH) reset"; | |
365 | break; | |
34fb562a SS |
366 | case USB_PORT_FEAT_C_CONNECTION: |
367 | status = PORT_CSC; | |
368 | port_change_bit = "connect"; | |
369 | break; | |
370 | case USB_PORT_FEAT_C_OVER_CURRENT: | |
371 | status = PORT_OCC; | |
372 | port_change_bit = "over-current"; | |
373 | break; | |
6219c047 SS |
374 | case USB_PORT_FEAT_C_ENABLE: |
375 | status = PORT_PEC; | |
376 | port_change_bit = "enable/disable"; | |
377 | break; | |
be88fe4f AX |
378 | case USB_PORT_FEAT_C_SUSPEND: |
379 | status = PORT_PLC; | |
380 | port_change_bit = "suspend/resume"; | |
381 | break; | |
85387c0e AX |
382 | case USB_PORT_FEAT_C_PORT_LINK_STATE: |
383 | status = PORT_PLC; | |
384 | port_change_bit = "link state"; | |
385 | break; | |
34fb562a SS |
386 | default: |
387 | /* Should never happen */ | |
388 | return; | |
389 | } | |
390 | /* Change bits are all write 1 to clear */ | |
391 | xhci_writel(xhci, port_status | status, addr); | |
392 | port_status = xhci_readl(xhci, addr); | |
393 | xhci_dbg(xhci, "clear port %s change, actual port %d status = 0x%x\n", | |
394 | port_change_bit, wIndex, port_status); | |
395 | } | |
396 | ||
a0885924 | 397 | static int xhci_get_ports(struct usb_hcd *hcd, __le32 __iomem ***port_array) |
398 | { | |
399 | int max_ports; | |
400 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
401 | ||
402 | if (hcd->speed == HCD_USB3) { | |
403 | max_ports = xhci->num_usb3_ports; | |
404 | *port_array = xhci->usb3_ports; | |
405 | } else { | |
406 | max_ports = xhci->num_usb2_ports; | |
407 | *port_array = xhci->usb2_ports; | |
408 | } | |
409 | ||
410 | return max_ports; | |
411 | } | |
412 | ||
c9682dff AX |
413 | void xhci_set_link_state(struct xhci_hcd *xhci, __le32 __iomem **port_array, |
414 | int port_id, u32 link_state) | |
415 | { | |
416 | u32 temp; | |
417 | ||
418 | temp = xhci_readl(xhci, port_array[port_id]); | |
419 | temp = xhci_port_state_to_neutral(temp); | |
420 | temp &= ~PORT_PLS_MASK; | |
421 | temp |= PORT_LINK_STROBE | link_state; | |
422 | xhci_writel(xhci, temp, port_array[port_id]); | |
423 | } | |
424 | ||
4296c70a SS |
425 | void xhci_set_remote_wake_mask(struct xhci_hcd *xhci, |
426 | __le32 __iomem **port_array, int port_id, u16 wake_mask) | |
427 | { | |
428 | u32 temp; | |
429 | ||
430 | temp = xhci_readl(xhci, port_array[port_id]); | |
431 | temp = xhci_port_state_to_neutral(temp); | |
432 | ||
433 | if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_CONNECT) | |
434 | temp |= PORT_WKCONN_E; | |
435 | else | |
436 | temp &= ~PORT_WKCONN_E; | |
437 | ||
438 | if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT) | |
439 | temp |= PORT_WKDISC_E; | |
440 | else | |
441 | temp &= ~PORT_WKDISC_E; | |
442 | ||
443 | if (wake_mask & USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT) | |
444 | temp |= PORT_WKOC_E; | |
445 | else | |
446 | temp &= ~PORT_WKOC_E; | |
447 | ||
448 | xhci_writel(xhci, temp, port_array[port_id]); | |
449 | } | |
450 | ||
d2f52c9e AX |
451 | /* Test and clear port RWC bit */ |
452 | void xhci_test_and_clear_bit(struct xhci_hcd *xhci, __le32 __iomem **port_array, | |
453 | int port_id, u32 port_bit) | |
454 | { | |
455 | u32 temp; | |
456 | ||
457 | temp = xhci_readl(xhci, port_array[port_id]); | |
458 | if (temp & port_bit) { | |
459 | temp = xhci_port_state_to_neutral(temp); | |
460 | temp |= port_bit; | |
461 | xhci_writel(xhci, temp, port_array[port_id]); | |
462 | } | |
463 | } | |
464 | ||
8bea2bd3 SL |
465 | /* Updates Link Status for super Speed port */ |
466 | static void xhci_hub_report_link_state(u32 *status, u32 status_reg) | |
467 | { | |
468 | u32 pls = status_reg & PORT_PLS_MASK; | |
469 | ||
470 | /* resume state is a xHCI internal state. | |
471 | * Do not report it to usb core. | |
472 | */ | |
473 | if (pls == XDEV_RESUME) | |
474 | return; | |
475 | ||
476 | /* When the CAS bit is set then warm reset | |
477 | * should be performed on port | |
478 | */ | |
479 | if (status_reg & PORT_CAS) { | |
480 | /* The CAS bit can be set while the port is | |
481 | * in any link state. | |
482 | * Only roothubs have CAS bit, so we | |
483 | * pretend to be in compliance mode | |
484 | * unless we're already in compliance | |
485 | * or the inactive state. | |
486 | */ | |
487 | if (pls != USB_SS_PORT_LS_COMP_MOD && | |
488 | pls != USB_SS_PORT_LS_SS_INACTIVE) { | |
489 | pls = USB_SS_PORT_LS_COMP_MOD; | |
490 | } | |
491 | /* Return also connection bit - | |
492 | * hub state machine resets port | |
493 | * when this bit is set. | |
494 | */ | |
495 | pls |= USB_PORT_STAT_CONNECTION; | |
71c731a2 AC |
496 | } else { |
497 | /* | |
498 | * If CAS bit isn't set but the Port is already at | |
499 | * Compliance Mode, fake a connection so the USB core | |
500 | * notices the Compliance state and resets the port. | |
501 | * This resolves an issue generated by the SN65LVPE502CP | |
502 | * in which sometimes the port enters compliance mode | |
503 | * caused by a delay on the host-device negotiation. | |
504 | */ | |
505 | if (pls == USB_SS_PORT_LS_COMP_MOD) | |
506 | pls |= USB_PORT_STAT_CONNECTION; | |
8bea2bd3 | 507 | } |
71c731a2 | 508 | |
8bea2bd3 SL |
509 | /* update status field */ |
510 | *status |= pls; | |
511 | } | |
512 | ||
71c731a2 AC |
513 | /* |
514 | * Function for Compliance Mode Quirk. | |
515 | * | |
516 | * This Function verifies if all xhc USB3 ports have entered U0, if so, | |
517 | * the compliance mode timer is deleted. A port won't enter | |
518 | * compliance mode if it has previously entered U0. | |
519 | */ | |
520 | void xhci_del_comp_mod_timer(struct xhci_hcd *xhci, u32 status, u16 wIndex) | |
521 | { | |
522 | u32 all_ports_seen_u0 = ((1 << xhci->num_usb3_ports)-1); | |
523 | bool port_in_u0 = ((status & PORT_PLS_MASK) == XDEV_U0); | |
524 | ||
525 | if (!(xhci->quirks & XHCI_COMP_MODE_QUIRK)) | |
526 | return; | |
527 | ||
528 | if ((xhci->port_status_u0 != all_ports_seen_u0) && port_in_u0) { | |
529 | xhci->port_status_u0 |= 1 << wIndex; | |
530 | if (xhci->port_status_u0 == all_ports_seen_u0) { | |
531 | del_timer_sync(&xhci->comp_mode_recovery_timer); | |
532 | xhci_dbg(xhci, "All USB3 ports have entered U0 already!\n"); | |
533 | xhci_dbg(xhci, "Compliance Mode Recovery Timer Deleted.\n"); | |
534 | } | |
535 | } | |
536 | } | |
537 | ||
0f2a7930 SS |
538 | int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, |
539 | u16 wIndex, char *buf, u16 wLength) | |
540 | { | |
541 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
a0885924 | 542 | int max_ports; |
0f2a7930 | 543 | unsigned long flags; |
c9682dff | 544 | u32 temp, status; |
0f2a7930 | 545 | int retval = 0; |
28ccd296 | 546 | __le32 __iomem **port_array; |
be88fe4f | 547 | int slot_id; |
20b67cf5 | 548 | struct xhci_bus_state *bus_state; |
2c441780 | 549 | u16 link_state = 0; |
4296c70a | 550 | u16 wake_mask = 0; |
797b0ca5 | 551 | u16 timeout = 0; |
0f2a7930 | 552 | |
a0885924 | 553 | max_ports = xhci_get_ports(hcd, &port_array); |
20b67cf5 | 554 | bus_state = &xhci->bus_state[hcd_index(hcd)]; |
0f2a7930 SS |
555 | |
556 | spin_lock_irqsave(&xhci->lock, flags); | |
557 | switch (typeReq) { | |
558 | case GetHubStatus: | |
559 | /* No power source, over-current reported per port */ | |
560 | memset(buf, 0, 4); | |
561 | break; | |
562 | case GetHubDescriptor: | |
4bbb0ace SS |
563 | /* Check to make sure userspace is asking for the USB 3.0 hub |
564 | * descriptor for the USB 3.0 roothub. If not, we stall the | |
565 | * endpoint, like external hubs do. | |
566 | */ | |
567 | if (hcd->speed == HCD_USB3 && | |
568 | (wLength < USB_DT_SS_HUB_SIZE || | |
569 | wValue != (USB_DT_SS_HUB << 8))) { | |
570 | xhci_dbg(xhci, "Wrong hub descriptor type for " | |
571 | "USB 3.0 roothub.\n"); | |
572 | goto error; | |
573 | } | |
f6ff0ac8 SS |
574 | xhci_hub_descriptor(hcd, xhci, |
575 | (struct usb_hub_descriptor *) buf); | |
0f2a7930 | 576 | break; |
48e82361 SS |
577 | case DeviceRequest | USB_REQ_GET_DESCRIPTOR: |
578 | if ((wValue & 0xff00) != (USB_DT_BOS << 8)) | |
579 | goto error; | |
580 | ||
581 | if (hcd->speed != HCD_USB3) | |
582 | goto error; | |
583 | ||
af3a23ef | 584 | /* Set the U1 and U2 exit latencies. */ |
48e82361 SS |
585 | memcpy(buf, &usb_bos_descriptor, |
586 | USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE); | |
587 | temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3); | |
588 | buf[12] = HCS_U1_LATENCY(temp); | |
589 | put_unaligned_le16(HCS_U2_LATENCY(temp), &buf[13]); | |
590 | ||
af3a23ef SS |
591 | /* Indicate whether the host has LTM support. */ |
592 | temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params); | |
593 | if (HCC_LTC(temp)) | |
594 | buf[8] |= USB_LTM_SUPPORT; | |
595 | ||
48e82361 SS |
596 | spin_unlock_irqrestore(&xhci->lock, flags); |
597 | return USB_DT_BOS_SIZE + USB_DT_USB_SS_CAP_SIZE; | |
0f2a7930 | 598 | case GetPortStatus: |
a0885924 | 599 | if (!wIndex || wIndex > max_ports) |
0f2a7930 SS |
600 | goto error; |
601 | wIndex--; | |
602 | status = 0; | |
5308a91b | 603 | temp = xhci_readl(xhci, port_array[wIndex]); |
f9de8151 SS |
604 | if (temp == 0xffffffff) { |
605 | retval = -ENODEV; | |
606 | break; | |
607 | } | |
0f2a7930 SS |
608 | xhci_dbg(xhci, "get port status, actual port %d status = 0x%x\n", wIndex, temp); |
609 | ||
610 | /* wPortChange bits */ | |
611 | if (temp & PORT_CSC) | |
749da5f8 | 612 | status |= USB_PORT_STAT_C_CONNECTION << 16; |
0f2a7930 | 613 | if (temp & PORT_PEC) |
749da5f8 | 614 | status |= USB_PORT_STAT_C_ENABLE << 16; |
0f2a7930 | 615 | if ((temp & PORT_OCC)) |
749da5f8 | 616 | status |= USB_PORT_STAT_C_OVERCURRENT << 16; |
0ed9a57e AX |
617 | if ((temp & PORT_RC)) |
618 | status |= USB_PORT_STAT_C_RESET << 16; | |
619 | /* USB3.0 only */ | |
620 | if (hcd->speed == HCD_USB3) { | |
621 | if ((temp & PORT_PLC)) | |
622 | status |= USB_PORT_STAT_C_LINK_STATE << 16; | |
623 | if ((temp & PORT_WRC)) | |
624 | status |= USB_PORT_STAT_C_BH_RESET << 16; | |
625 | } | |
626 | ||
627 | if (hcd->speed != HCD_USB3) { | |
628 | if ((temp & PORT_PLS_MASK) == XDEV_U3 | |
629 | && (temp & PORT_POWER)) | |
630 | status |= USB_PORT_STAT_SUSPEND; | |
631 | } | |
8a8ff2f9 AX |
632 | if ((temp & PORT_PLS_MASK) == XDEV_RESUME && |
633 | !DEV_SUPERSPEED(temp)) { | |
56192531 AX |
634 | if ((temp & PORT_RESET) || !(temp & PORT_PE)) |
635 | goto error; | |
8a8ff2f9 AX |
636 | if (time_after_eq(jiffies, |
637 | bus_state->resume_done[wIndex])) { | |
56192531 AX |
638 | xhci_dbg(xhci, "Resume USB2 port %d\n", |
639 | wIndex + 1); | |
20b67cf5 | 640 | bus_state->resume_done[wIndex] = 0; |
f370b996 | 641 | clear_bit(wIndex, &bus_state->resuming_ports); |
c9682dff AX |
642 | xhci_set_link_state(xhci, port_array, wIndex, |
643 | XDEV_U0); | |
56192531 AX |
644 | xhci_dbg(xhci, "set port %d resume\n", |
645 | wIndex + 1); | |
5233630f | 646 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
56192531 AX |
647 | wIndex + 1); |
648 | if (!slot_id) { | |
649 | xhci_dbg(xhci, "slot_id is zero\n"); | |
650 | goto error; | |
651 | } | |
652 | xhci_ring_device(xhci, slot_id); | |
20b67cf5 SS |
653 | bus_state->port_c_suspend |= 1 << wIndex; |
654 | bus_state->suspended_ports &= ~(1 << wIndex); | |
8a8ff2f9 AX |
655 | } else { |
656 | /* | |
657 | * The resume has been signaling for less than | |
658 | * 20ms. Report the port status as SUSPEND, | |
659 | * let the usbcore check port status again | |
660 | * and clear resume signaling later. | |
661 | */ | |
662 | status |= USB_PORT_STAT_SUSPEND; | |
56192531 AX |
663 | } |
664 | } | |
be88fe4f AX |
665 | if ((temp & PORT_PLS_MASK) == XDEV_U0 |
666 | && (temp & PORT_POWER) | |
20b67cf5 SS |
667 | && (bus_state->suspended_ports & (1 << wIndex))) { |
668 | bus_state->suspended_ports &= ~(1 << wIndex); | |
a7114230 AX |
669 | if (hcd->speed != HCD_USB3) |
670 | bus_state->port_c_suspend |= 1 << wIndex; | |
be88fe4f | 671 | } |
0f2a7930 | 672 | if (temp & PORT_CONNECT) { |
749da5f8 | 673 | status |= USB_PORT_STAT_CONNECTION; |
0f2a7930 SS |
674 | status |= xhci_port_speed(temp); |
675 | } | |
676 | if (temp & PORT_PE) | |
749da5f8 | 677 | status |= USB_PORT_STAT_ENABLE; |
0f2a7930 | 678 | if (temp & PORT_OC) |
749da5f8 | 679 | status |= USB_PORT_STAT_OVERCURRENT; |
0f2a7930 | 680 | if (temp & PORT_RESET) |
749da5f8 | 681 | status |= USB_PORT_STAT_RESET; |
0ed9a57e AX |
682 | if (temp & PORT_POWER) { |
683 | if (hcd->speed == HCD_USB3) | |
684 | status |= USB_SS_PORT_STAT_POWER; | |
685 | else | |
686 | status |= USB_PORT_STAT_POWER; | |
687 | } | |
8bea2bd3 | 688 | /* Update Port Link State for super speed ports*/ |
0ed9a57e | 689 | if (hcd->speed == HCD_USB3) { |
8bea2bd3 | 690 | xhci_hub_report_link_state(&status, temp); |
71c731a2 AC |
691 | /* |
692 | * Verify if all USB3 Ports Have entered U0 already. | |
693 | * Delete Compliance Mode Timer if so. | |
694 | */ | |
695 | xhci_del_comp_mod_timer(xhci, temp, wIndex); | |
0ed9a57e | 696 | } |
20b67cf5 | 697 | if (bus_state->port_c_suspend & (1 << wIndex)) |
be88fe4f | 698 | status |= 1 << USB_PORT_FEAT_C_SUSPEND; |
0f2a7930 SS |
699 | xhci_dbg(xhci, "Get port status returned 0x%x\n", status); |
700 | put_unaligned(cpu_to_le32(status), (__le32 *) buf); | |
701 | break; | |
702 | case SetPortFeature: | |
2c441780 AX |
703 | if (wValue == USB_PORT_FEAT_LINK_STATE) |
704 | link_state = (wIndex & 0xff00) >> 3; | |
4296c70a SS |
705 | if (wValue == USB_PORT_FEAT_REMOTE_WAKE_MASK) |
706 | wake_mask = wIndex & 0xff00; | |
797b0ca5 SS |
707 | /* The MSB of wIndex is the U1/U2 timeout */ |
708 | timeout = (wIndex & 0xff00) >> 8; | |
0f2a7930 | 709 | wIndex &= 0xff; |
a0885924 | 710 | if (!wIndex || wIndex > max_ports) |
0f2a7930 SS |
711 | goto error; |
712 | wIndex--; | |
5308a91b | 713 | temp = xhci_readl(xhci, port_array[wIndex]); |
f9de8151 SS |
714 | if (temp == 0xffffffff) { |
715 | retval = -ENODEV; | |
716 | break; | |
717 | } | |
0f2a7930 | 718 | temp = xhci_port_state_to_neutral(temp); |
4bbb0ace | 719 | /* FIXME: What new port features do we need to support? */ |
0f2a7930 | 720 | switch (wValue) { |
be88fe4f | 721 | case USB_PORT_FEAT_SUSPEND: |
5308a91b | 722 | temp = xhci_readl(xhci, port_array[wIndex]); |
65580b43 AX |
723 | if ((temp & PORT_PLS_MASK) != XDEV_U0) { |
724 | /* Resume the port to U0 first */ | |
725 | xhci_set_link_state(xhci, port_array, wIndex, | |
726 | XDEV_U0); | |
727 | spin_unlock_irqrestore(&xhci->lock, flags); | |
728 | msleep(10); | |
729 | spin_lock_irqsave(&xhci->lock, flags); | |
730 | } | |
be88fe4f AX |
731 | /* In spec software should not attempt to suspend |
732 | * a port unless the port reports that it is in the | |
733 | * enabled (PED = ‘1’,PLS < ‘3’) state. | |
734 | */ | |
65580b43 | 735 | temp = xhci_readl(xhci, port_array[wIndex]); |
be88fe4f AX |
736 | if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) |
737 | || (temp & PORT_PLS_MASK) >= XDEV_U3) { | |
738 | xhci_warn(xhci, "USB core suspending device " | |
739 | "not in U0/U1/U2.\n"); | |
740 | goto error; | |
741 | } | |
742 | ||
5233630f SS |
743 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
744 | wIndex + 1); | |
be88fe4f AX |
745 | if (!slot_id) { |
746 | xhci_warn(xhci, "slot_id is zero\n"); | |
747 | goto error; | |
748 | } | |
749 | /* unlock to execute stop endpoint commands */ | |
750 | spin_unlock_irqrestore(&xhci->lock, flags); | |
751 | xhci_stop_device(xhci, slot_id, 1); | |
752 | spin_lock_irqsave(&xhci->lock, flags); | |
753 | ||
c9682dff | 754 | xhci_set_link_state(xhci, port_array, wIndex, XDEV_U3); |
be88fe4f AX |
755 | |
756 | spin_unlock_irqrestore(&xhci->lock, flags); | |
757 | msleep(10); /* wait device to enter */ | |
758 | spin_lock_irqsave(&xhci->lock, flags); | |
759 | ||
5308a91b | 760 | temp = xhci_readl(xhci, port_array[wIndex]); |
20b67cf5 | 761 | bus_state->suspended_ports |= 1 << wIndex; |
be88fe4f | 762 | break; |
2c441780 AX |
763 | case USB_PORT_FEAT_LINK_STATE: |
764 | temp = xhci_readl(xhci, port_array[wIndex]); | |
765 | /* Software should not attempt to set | |
766 | * port link state above '5' (Rx.Detect) and the port | |
767 | * must be enabled. | |
768 | */ | |
769 | if ((temp & PORT_PE) == 0 || | |
770 | (link_state > USB_SS_PORT_LS_RX_DETECT)) { | |
771 | xhci_warn(xhci, "Cannot set link state.\n"); | |
772 | goto error; | |
773 | } | |
774 | ||
775 | if (link_state == USB_SS_PORT_LS_U3) { | |
776 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, | |
777 | wIndex + 1); | |
778 | if (slot_id) { | |
779 | /* unlock to execute stop endpoint | |
780 | * commands */ | |
781 | spin_unlock_irqrestore(&xhci->lock, | |
782 | flags); | |
783 | xhci_stop_device(xhci, slot_id, 1); | |
784 | spin_lock_irqsave(&xhci->lock, flags); | |
785 | } | |
786 | } | |
787 | ||
c9682dff AX |
788 | xhci_set_link_state(xhci, port_array, wIndex, |
789 | link_state); | |
2c441780 AX |
790 | |
791 | spin_unlock_irqrestore(&xhci->lock, flags); | |
792 | msleep(20); /* wait device to enter */ | |
793 | spin_lock_irqsave(&xhci->lock, flags); | |
794 | ||
795 | temp = xhci_readl(xhci, port_array[wIndex]); | |
796 | if (link_state == USB_SS_PORT_LS_U3) | |
797 | bus_state->suspended_ports |= 1 << wIndex; | |
798 | break; | |
0f2a7930 SS |
799 | case USB_PORT_FEAT_POWER: |
800 | /* | |
801 | * Turn on ports, even if there isn't per-port switching. | |
802 | * HC will report connect events even before this is set. | |
803 | * However, khubd will ignore the roothub events until | |
804 | * the roothub is registered. | |
805 | */ | |
5308a91b SS |
806 | xhci_writel(xhci, temp | PORT_POWER, |
807 | port_array[wIndex]); | |
0f2a7930 | 808 | |
5308a91b | 809 | temp = xhci_readl(xhci, port_array[wIndex]); |
0f2a7930 SS |
810 | xhci_dbg(xhci, "set port power, actual port %d status = 0x%x\n", wIndex, temp); |
811 | break; | |
812 | case USB_PORT_FEAT_RESET: | |
813 | temp = (temp | PORT_RESET); | |
5308a91b | 814 | xhci_writel(xhci, temp, port_array[wIndex]); |
0f2a7930 | 815 | |
5308a91b | 816 | temp = xhci_readl(xhci, port_array[wIndex]); |
0f2a7930 SS |
817 | xhci_dbg(xhci, "set port reset, actual port %d status = 0x%x\n", wIndex, temp); |
818 | break; | |
4296c70a SS |
819 | case USB_PORT_FEAT_REMOTE_WAKE_MASK: |
820 | xhci_set_remote_wake_mask(xhci, port_array, | |
821 | wIndex, wake_mask); | |
822 | temp = xhci_readl(xhci, port_array[wIndex]); | |
823 | xhci_dbg(xhci, "set port remote wake mask, " | |
824 | "actual port %d status = 0x%x\n", | |
825 | wIndex, temp); | |
826 | break; | |
a11496eb AX |
827 | case USB_PORT_FEAT_BH_PORT_RESET: |
828 | temp |= PORT_WR; | |
829 | xhci_writel(xhci, temp, port_array[wIndex]); | |
830 | ||
831 | temp = xhci_readl(xhci, port_array[wIndex]); | |
832 | break; | |
797b0ca5 SS |
833 | case USB_PORT_FEAT_U1_TIMEOUT: |
834 | if (hcd->speed != HCD_USB3) | |
835 | goto error; | |
836 | temp = xhci_readl(xhci, port_array[wIndex] + 1); | |
837 | temp &= ~PORT_U1_TIMEOUT_MASK; | |
838 | temp |= PORT_U1_TIMEOUT(timeout); | |
839 | xhci_writel(xhci, temp, port_array[wIndex] + 1); | |
840 | break; | |
841 | case USB_PORT_FEAT_U2_TIMEOUT: | |
842 | if (hcd->speed != HCD_USB3) | |
843 | goto error; | |
844 | temp = xhci_readl(xhci, port_array[wIndex] + 1); | |
845 | temp &= ~PORT_U2_TIMEOUT_MASK; | |
846 | temp |= PORT_U2_TIMEOUT(timeout); | |
847 | xhci_writel(xhci, temp, port_array[wIndex] + 1); | |
848 | break; | |
0f2a7930 SS |
849 | default: |
850 | goto error; | |
851 | } | |
5308a91b SS |
852 | /* unblock any posted writes */ |
853 | temp = xhci_readl(xhci, port_array[wIndex]); | |
0f2a7930 SS |
854 | break; |
855 | case ClearPortFeature: | |
a0885924 | 856 | if (!wIndex || wIndex > max_ports) |
0f2a7930 SS |
857 | goto error; |
858 | wIndex--; | |
5308a91b | 859 | temp = xhci_readl(xhci, port_array[wIndex]); |
f9de8151 SS |
860 | if (temp == 0xffffffff) { |
861 | retval = -ENODEV; | |
862 | break; | |
863 | } | |
4bbb0ace | 864 | /* FIXME: What new port features do we need to support? */ |
0f2a7930 SS |
865 | temp = xhci_port_state_to_neutral(temp); |
866 | switch (wValue) { | |
be88fe4f | 867 | case USB_PORT_FEAT_SUSPEND: |
5308a91b | 868 | temp = xhci_readl(xhci, port_array[wIndex]); |
be88fe4f AX |
869 | xhci_dbg(xhci, "clear USB_PORT_FEAT_SUSPEND\n"); |
870 | xhci_dbg(xhci, "PORTSC %04x\n", temp); | |
871 | if (temp & PORT_RESET) | |
872 | goto error; | |
5ac04bf1 | 873 | if ((temp & PORT_PLS_MASK) == XDEV_U3) { |
be88fe4f AX |
874 | if ((temp & PORT_PE) == 0) |
875 | goto error; | |
be88fe4f | 876 | |
c9682dff AX |
877 | xhci_set_link_state(xhci, port_array, wIndex, |
878 | XDEV_RESUME); | |
879 | spin_unlock_irqrestore(&xhci->lock, flags); | |
a7114230 AX |
880 | msleep(20); |
881 | spin_lock_irqsave(&xhci->lock, flags); | |
c9682dff AX |
882 | xhci_set_link_state(xhci, port_array, wIndex, |
883 | XDEV_U0); | |
be88fe4f | 884 | } |
a7114230 | 885 | bus_state->port_c_suspend |= 1 << wIndex; |
be88fe4f | 886 | |
5233630f SS |
887 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
888 | wIndex + 1); | |
be88fe4f AX |
889 | if (!slot_id) { |
890 | xhci_dbg(xhci, "slot_id is zero\n"); | |
891 | goto error; | |
892 | } | |
893 | xhci_ring_device(xhci, slot_id); | |
894 | break; | |
895 | case USB_PORT_FEAT_C_SUSPEND: | |
20b67cf5 | 896 | bus_state->port_c_suspend &= ~(1 << wIndex); |
0f2a7930 | 897 | case USB_PORT_FEAT_C_RESET: |
a11496eb | 898 | case USB_PORT_FEAT_C_BH_PORT_RESET: |
0f2a7930 | 899 | case USB_PORT_FEAT_C_CONNECTION: |
0f2a7930 | 900 | case USB_PORT_FEAT_C_OVER_CURRENT: |
6219c047 | 901 | case USB_PORT_FEAT_C_ENABLE: |
85387c0e | 902 | case USB_PORT_FEAT_C_PORT_LINK_STATE: |
34fb562a | 903 | xhci_clear_port_change_bit(xhci, wValue, wIndex, |
5308a91b | 904 | port_array[wIndex], temp); |
0f2a7930 | 905 | break; |
6219c047 | 906 | case USB_PORT_FEAT_ENABLE: |
f6ff0ac8 | 907 | xhci_disable_port(hcd, xhci, wIndex, |
5308a91b | 908 | port_array[wIndex], temp); |
6219c047 | 909 | break; |
0f2a7930 SS |
910 | default: |
911 | goto error; | |
912 | } | |
0f2a7930 SS |
913 | break; |
914 | default: | |
915 | error: | |
916 | /* "stall" on error */ | |
917 | retval = -EPIPE; | |
918 | } | |
919 | spin_unlock_irqrestore(&xhci->lock, flags); | |
920 | return retval; | |
921 | } | |
922 | ||
923 | /* | |
924 | * Returns 0 if the status hasn't changed, or the number of bytes in buf. | |
925 | * Ports are 0-indexed from the HCD point of view, | |
926 | * and 1-indexed from the USB core pointer of view. | |
0f2a7930 SS |
927 | * |
928 | * Note that the status change bits will be cleared as soon as a port status | |
929 | * change event is generated, so we use the saved status from that event. | |
930 | */ | |
931 | int xhci_hub_status_data(struct usb_hcd *hcd, char *buf) | |
932 | { | |
933 | unsigned long flags; | |
934 | u32 temp, status; | |
56192531 | 935 | u32 mask; |
0f2a7930 SS |
936 | int i, retval; |
937 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
a0885924 | 938 | int max_ports; |
28ccd296 | 939 | __le32 __iomem **port_array; |
20b67cf5 | 940 | struct xhci_bus_state *bus_state; |
0f2a7930 | 941 | |
a0885924 | 942 | max_ports = xhci_get_ports(hcd, &port_array); |
20b67cf5 | 943 | bus_state = &xhci->bus_state[hcd_index(hcd)]; |
0f2a7930 SS |
944 | |
945 | /* Initial status is no changes */ | |
a0885924 | 946 | retval = (max_ports + 8) / 8; |
419a8e81 | 947 | memset(buf, 0, retval); |
f370b996 AX |
948 | |
949 | /* | |
950 | * Inform the usbcore about resume-in-progress by returning | |
951 | * a non-zero value even if there are no status changes. | |
952 | */ | |
953 | status = bus_state->resuming_ports; | |
0f2a7930 | 954 | |
44f4c3ed | 955 | mask = PORT_CSC | PORT_PEC | PORT_OCC | PORT_PLC | PORT_WRC; |
56192531 | 956 | |
0f2a7930 SS |
957 | spin_lock_irqsave(&xhci->lock, flags); |
958 | /* For each port, did anything change? If so, set that bit in buf. */ | |
a0885924 | 959 | for (i = 0; i < max_ports; i++) { |
5308a91b | 960 | temp = xhci_readl(xhci, port_array[i]); |
f9de8151 SS |
961 | if (temp == 0xffffffff) { |
962 | retval = -ENODEV; | |
963 | break; | |
964 | } | |
56192531 | 965 | if ((temp & mask) != 0 || |
20b67cf5 SS |
966 | (bus_state->port_c_suspend & 1 << i) || |
967 | (bus_state->resume_done[i] && time_after_eq( | |
968 | jiffies, bus_state->resume_done[i]))) { | |
419a8e81 | 969 | buf[(i + 1) / 8] |= 1 << (i + 1) % 8; |
0f2a7930 SS |
970 | status = 1; |
971 | } | |
972 | } | |
973 | spin_unlock_irqrestore(&xhci->lock, flags); | |
974 | return status ? retval : 0; | |
975 | } | |
9777e3ce AX |
976 | |
977 | #ifdef CONFIG_PM | |
978 | ||
979 | int xhci_bus_suspend(struct usb_hcd *hcd) | |
980 | { | |
981 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
518e848e | 982 | int max_ports, port_index; |
28ccd296 | 983 | __le32 __iomem **port_array; |
20b67cf5 | 984 | struct xhci_bus_state *bus_state; |
9777e3ce AX |
985 | unsigned long flags; |
986 | ||
a0885924 | 987 | max_ports = xhci_get_ports(hcd, &port_array); |
20b67cf5 | 988 | bus_state = &xhci->bus_state[hcd_index(hcd)]; |
9777e3ce AX |
989 | |
990 | spin_lock_irqsave(&xhci->lock, flags); | |
991 | ||
992 | if (hcd->self.root_hub->do_remote_wakeup) { | |
f370b996 AX |
993 | if (bus_state->resuming_ports) { |
994 | spin_unlock_irqrestore(&xhci->lock, flags); | |
995 | xhci_dbg(xhci, "suspend failed because " | |
996 | "a port is resuming\n"); | |
997 | return -EBUSY; | |
9777e3ce AX |
998 | } |
999 | } | |
1000 | ||
518e848e | 1001 | port_index = max_ports; |
20b67cf5 | 1002 | bus_state->bus_suspended = 0; |
518e848e | 1003 | while (port_index--) { |
9777e3ce | 1004 | /* suspend the port if the port is not suspended */ |
9777e3ce AX |
1005 | u32 t1, t2; |
1006 | int slot_id; | |
1007 | ||
5308a91b | 1008 | t1 = xhci_readl(xhci, port_array[port_index]); |
9777e3ce AX |
1009 | t2 = xhci_port_state_to_neutral(t1); |
1010 | ||
1011 | if ((t1 & PORT_PE) && !(t1 & PORT_PLS_MASK)) { | |
518e848e | 1012 | xhci_dbg(xhci, "port %d not suspended\n", port_index); |
5233630f | 1013 | slot_id = xhci_find_slot_id_by_port(hcd, xhci, |
518e848e | 1014 | port_index + 1); |
9777e3ce AX |
1015 | if (slot_id) { |
1016 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1017 | xhci_stop_device(xhci, slot_id, 1); | |
1018 | spin_lock_irqsave(&xhci->lock, flags); | |
1019 | } | |
1020 | t2 &= ~PORT_PLS_MASK; | |
1021 | t2 |= PORT_LINK_STROBE | XDEV_U3; | |
20b67cf5 | 1022 | set_bit(port_index, &bus_state->bus_suspended); |
9777e3ce | 1023 | } |
4296c70a SS |
1024 | /* USB core sets remote wake mask for USB 3.0 hubs, |
1025 | * including the USB 3.0 roothub, but only if CONFIG_USB_SUSPEND | |
1026 | * is enabled, so also enable remote wake here. | |
1027 | */ | |
9777e3ce AX |
1028 | if (hcd->self.root_hub->do_remote_wakeup) { |
1029 | if (t1 & PORT_CONNECT) { | |
1030 | t2 |= PORT_WKOC_E | PORT_WKDISC_E; | |
1031 | t2 &= ~PORT_WKCONN_E; | |
1032 | } else { | |
1033 | t2 |= PORT_WKOC_E | PORT_WKCONN_E; | |
1034 | t2 &= ~PORT_WKDISC_E; | |
1035 | } | |
1036 | } else | |
1037 | t2 &= ~PORT_WAKE_BITS; | |
1038 | ||
1039 | t1 = xhci_port_state_to_neutral(t1); | |
1040 | if (t1 != t2) | |
5308a91b | 1041 | xhci_writel(xhci, t2, port_array[port_index]); |
9777e3ce | 1042 | |
4f0871a6 | 1043 | if (hcd->speed != HCD_USB3) { |
9777e3ce | 1044 | /* enable remote wake up for USB 2.0 */ |
28ccd296 | 1045 | __le32 __iomem *addr; |
9777e3ce AX |
1046 | u32 tmp; |
1047 | ||
5308a91b SS |
1048 | /* Add one to the port status register address to get |
1049 | * the port power control register address. | |
1050 | */ | |
1051 | addr = port_array[port_index] + 1; | |
9777e3ce AX |
1052 | tmp = xhci_readl(xhci, addr); |
1053 | tmp |= PORT_RWE; | |
1054 | xhci_writel(xhci, tmp, addr); | |
1055 | } | |
1056 | } | |
1057 | hcd->state = HC_STATE_SUSPENDED; | |
20b67cf5 | 1058 | bus_state->next_statechange = jiffies + msecs_to_jiffies(10); |
9777e3ce AX |
1059 | spin_unlock_irqrestore(&xhci->lock, flags); |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | int xhci_bus_resume(struct usb_hcd *hcd) | |
1064 | { | |
1065 | struct xhci_hcd *xhci = hcd_to_xhci(hcd); | |
518e848e | 1066 | int max_ports, port_index; |
28ccd296 | 1067 | __le32 __iomem **port_array; |
20b67cf5 | 1068 | struct xhci_bus_state *bus_state; |
9777e3ce AX |
1069 | u32 temp; |
1070 | unsigned long flags; | |
1071 | ||
a0885924 | 1072 | max_ports = xhci_get_ports(hcd, &port_array); |
20b67cf5 | 1073 | bus_state = &xhci->bus_state[hcd_index(hcd)]; |
9777e3ce | 1074 | |
20b67cf5 | 1075 | if (time_before(jiffies, bus_state->next_statechange)) |
9777e3ce AX |
1076 | msleep(5); |
1077 | ||
1078 | spin_lock_irqsave(&xhci->lock, flags); | |
1079 | if (!HCD_HW_ACCESSIBLE(hcd)) { | |
1080 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1081 | return -ESHUTDOWN; | |
1082 | } | |
1083 | ||
1084 | /* delay the irqs */ | |
1085 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
1086 | temp &= ~CMD_EIE; | |
1087 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
1088 | ||
518e848e SS |
1089 | port_index = max_ports; |
1090 | while (port_index--) { | |
9777e3ce AX |
1091 | /* Check whether need resume ports. If needed |
1092 | resume port and disable remote wakeup */ | |
9777e3ce AX |
1093 | u32 temp; |
1094 | int slot_id; | |
1095 | ||
5308a91b | 1096 | temp = xhci_readl(xhci, port_array[port_index]); |
9777e3ce AX |
1097 | if (DEV_SUPERSPEED(temp)) |
1098 | temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS); | |
1099 | else | |
1100 | temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); | |
20b67cf5 | 1101 | if (test_bit(port_index, &bus_state->bus_suspended) && |
9777e3ce AX |
1102 | (temp & PORT_PLS_MASK)) { |
1103 | if (DEV_SUPERSPEED(temp)) { | |
c9682dff AX |
1104 | xhci_set_link_state(xhci, port_array, |
1105 | port_index, XDEV_U0); | |
9777e3ce | 1106 | } else { |
c9682dff AX |
1107 | xhci_set_link_state(xhci, port_array, |
1108 | port_index, XDEV_RESUME); | |
9777e3ce AX |
1109 | |
1110 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1111 | msleep(20); | |
1112 | spin_lock_irqsave(&xhci->lock, flags); | |
1113 | ||
c9682dff AX |
1114 | xhci_set_link_state(xhci, port_array, |
1115 | port_index, XDEV_U0); | |
9777e3ce | 1116 | } |
4f0871a6 AX |
1117 | /* wait for the port to enter U0 and report port link |
1118 | * state change. | |
1119 | */ | |
1120 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1121 | msleep(20); | |
1122 | spin_lock_irqsave(&xhci->lock, flags); | |
1123 | ||
1124 | /* Clear PLC */ | |
d2f52c9e AX |
1125 | xhci_test_and_clear_bit(xhci, port_array, port_index, |
1126 | PORT_PLC); | |
4f0871a6 | 1127 | |
5233630f SS |
1128 | slot_id = xhci_find_slot_id_by_port(hcd, |
1129 | xhci, port_index + 1); | |
9777e3ce AX |
1130 | if (slot_id) |
1131 | xhci_ring_device(xhci, slot_id); | |
1132 | } else | |
5308a91b | 1133 | xhci_writel(xhci, temp, port_array[port_index]); |
9777e3ce | 1134 | |
4f0871a6 | 1135 | if (hcd->speed != HCD_USB3) { |
9777e3ce | 1136 | /* disable remote wake up for USB 2.0 */ |
28ccd296 | 1137 | __le32 __iomem *addr; |
9777e3ce AX |
1138 | u32 tmp; |
1139 | ||
5308a91b SS |
1140 | /* Add one to the port status register address to get |
1141 | * the port power control register address. | |
1142 | */ | |
1143 | addr = port_array[port_index] + 1; | |
9777e3ce AX |
1144 | tmp = xhci_readl(xhci, addr); |
1145 | tmp &= ~PORT_RWE; | |
1146 | xhci_writel(xhci, tmp, addr); | |
1147 | } | |
1148 | } | |
1149 | ||
1150 | (void) xhci_readl(xhci, &xhci->op_regs->command); | |
1151 | ||
20b67cf5 | 1152 | bus_state->next_statechange = jiffies + msecs_to_jiffies(5); |
9777e3ce AX |
1153 | /* re-enable irqs */ |
1154 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
1155 | temp |= CMD_EIE; | |
1156 | xhci_writel(xhci, temp, &xhci->op_regs->command); | |
1157 | temp = xhci_readl(xhci, &xhci->op_regs->command); | |
1158 | ||
1159 | spin_unlock_irqrestore(&xhci->lock, flags); | |
1160 | return 0; | |
1161 | } | |
1162 | ||
436a3890 | 1163 | #endif /* CONFIG_PM */ |