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Kevin O'Connor114592f2009-09-28 21:32:08 -04001// Code for handling UHCI USB controllers.
2//
3// Copyright (C) 2009 Kevin O'Connor <kevin@koconnor.net>
4//
5// This file may be distributed under the terms of the GNU LGPLv3 license.
6
7#include "util.h" // dprintf
8#include "pci.h" // pci_bdf_to_bus
9#include "config.h" // CONFIG_*
10#include "ioport.h" // outw
11#include "usb-uhci.h" // USBLEGSUP
12#include "pci_regs.h" // PCI_BASE_ADDRESS_4
13#include "usb.h" // struct usb_s
14#include "farptr.h" // GET_FLATPTR
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050015
Kevin O'Connor406fad62010-02-28 02:23:19 -050016struct usb_uhci_s {
17 struct usb_s usb;
18 u16 iobase;
19 struct uhci_qh *control_qh, *bulk_qh;
20 struct uhci_framelist *framelist;
21};
22
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050023
24/****************************************************************
25 * Root hub
26 ****************************************************************/
27
Kevin O'Connord28b0fe2010-03-28 15:11:19 -040028// Check if device attached to a given port
29static int
30uhci_hub_detect(struct usbhub_s *hub, u32 port)
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050031{
Kevin O'Connor406fad62010-02-28 02:23:19 -050032 struct usb_uhci_s *cntl = container_of(hub->cntl, struct usb_uhci_s, usb);
33 u16 ioport = cntl->iobase + USBPORTSC1 + port * 2;
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050034
35 u16 status = inw(ioport);
36 if (!(status & USBPORTSC_CCS))
37 // No device
Kevin O'Connord28b0fe2010-03-28 15:11:19 -040038 return -1;
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050039
40 // XXX - if just powered up, need to wait for USB_TIME_ATTDB?
41
Kevin O'Connord28b0fe2010-03-28 15:11:19 -040042 // Begin reset on port
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050043 outw(USBPORTSC_PR, ioport);
44 msleep(USB_TIME_DRSTR);
Kevin O'Connord28b0fe2010-03-28 15:11:19 -040045 return 0;
46}
47
48// Reset device on port
49static int
50uhci_hub_reset(struct usbhub_s *hub, u32 port)
51{
52 struct usb_uhci_s *cntl = container_of(hub->cntl, struct usb_uhci_s, usb);
53 u16 ioport = cntl->iobase + USBPORTSC1 + port * 2;
54
55 // Finish reset on port
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050056 outw(0, ioport);
57 udelay(6); // 64 high-speed bit times
Kevin O'Connord28b0fe2010-03-28 15:11:19 -040058 u16 status = inw(ioport);
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050059 if (!(status & USBPORTSC_CCS))
60 // No longer connected
Kevin O'Connord28b0fe2010-03-28 15:11:19 -040061 return -1;
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050062 outw(USBPORTSC_PE, ioport);
Kevin O'Connord28b0fe2010-03-28 15:11:19 -040063 return !!(status & USBPORTSC_LSDA);
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050064}
65
Kevin O'Connord28b0fe2010-03-28 15:11:19 -040066// Disable port
67static void
68uhci_hub_disconnect(struct usbhub_s *hub, u32 port)
69{
70 struct usb_uhci_s *cntl = container_of(hub->cntl, struct usb_uhci_s, usb);
71 u16 ioport = cntl->iobase + USBPORTSC1 + port * 2;
72 outw(0, ioport);
73}
74
75static struct usbhub_op_s uhci_HubOp = {
76 .detect = uhci_hub_detect,
77 .reset = uhci_hub_reset,
78 .disconnect = uhci_hub_disconnect,
79};
80
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050081// Find any devices connected to the root hub.
82static int
Kevin O'Connor406fad62010-02-28 02:23:19 -050083check_uhci_ports(struct usb_uhci_s *cntl)
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050084{
85 ASSERT32FLAT();
86 struct usbhub_s hub;
87 memset(&hub, 0, sizeof(hub));
Kevin O'Connor406fad62010-02-28 02:23:19 -050088 hub.cntl = &cntl->usb;
Kevin O'Connord28b0fe2010-03-28 15:11:19 -040089 hub.portcount = 2;
90 hub.op = &uhci_HubOp;
91 usb_enumerate(&hub);
Kevin O'Connor8ebcac02010-03-09 19:58:23 -050092 return hub.devcount;
93}
Kevin O'Connor357bdfa2010-02-26 08:57:13 -050094
95
96/****************************************************************
97 * Setup
98 ****************************************************************/
Kevin O'Connor114592f2009-09-28 21:32:08 -040099
100static void
Kevin O'Connor406fad62010-02-28 02:23:19 -0500101reset_uhci(struct usb_uhci_s *cntl, u16 bdf)
Kevin O'Connor114592f2009-09-28 21:32:08 -0400102{
103 // XXX - don't reset if not needed.
104
105 // Reset PIRQ and SMI
Kevin O'Connor406fad62010-02-28 02:23:19 -0500106 pci_config_writew(bdf, USBLEGSUP, USBLEGSUP_RWC);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400107
108 // Reset the HC
Kevin O'Connor406fad62010-02-28 02:23:19 -0500109 outw(USBCMD_HCRESET, cntl->iobase + USBCMD);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400110 udelay(5);
111
112 // Disable interrupts and commands (just to be safe).
Kevin O'Connor406fad62010-02-28 02:23:19 -0500113 outw(0, cntl->iobase + USBINTR);
114 outw(0, cntl->iobase + USBCMD);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400115}
116
117static void
Kevin O'Connor406fad62010-02-28 02:23:19 -0500118configure_uhci(void *data)
Kevin O'Connor114592f2009-09-28 21:32:08 -0400119{
Kevin O'Connor406fad62010-02-28 02:23:19 -0500120 struct usb_uhci_s *cntl = data;
121
Kevin O'Connor114592f2009-09-28 21:32:08 -0400122 // Allocate ram for schedule storage
123 struct uhci_td *term_td = malloc_high(sizeof(*term_td));
124 struct uhci_framelist *fl = memalign_high(sizeof(*fl), sizeof(*fl));
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500125 struct uhci_qh *intr_qh = malloc_high(sizeof(*intr_qh));
Kevin O'Connor114592f2009-09-28 21:32:08 -0400126 struct uhci_qh *term_qh = malloc_high(sizeof(*term_qh));
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500127 if (!term_td || !fl || !intr_qh || !term_qh) {
Kevin O'Connorcfdc13f2010-02-14 13:07:54 -0500128 warn_noalloc();
Kevin O'Connor406fad62010-02-28 02:23:19 -0500129 goto fail;
Kevin O'Connor114592f2009-09-28 21:32:08 -0400130 }
131
132 // Work around for PIIX errata
133 memset(term_td, 0, sizeof(*term_td));
134 term_td->link = UHCI_PTR_TERM;
135 term_td->token = (uhci_explen(0) | (0x7f << TD_TOKEN_DEVADDR_SHIFT)
136 | USB_PID_IN);
137 memset(term_qh, 0, sizeof(*term_qh));
138 term_qh->element = (u32)term_td;
139 term_qh->link = UHCI_PTR_TERM;
140
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500141 // Set schedule to point to primary intr queue head
142 memset(intr_qh, 0, sizeof(*intr_qh));
143 intr_qh->element = UHCI_PTR_TERM;
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500144 intr_qh->link = (u32)term_qh | UHCI_PTR_QH;
Kevin O'Connor114592f2009-09-28 21:32:08 -0400145 int i;
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500146 for (i=0; i<ARRAY_SIZE(fl->links); i++)
147 fl->links[i] = (u32)intr_qh | UHCI_PTR_QH;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500148 cntl->framelist = fl;
149 cntl->control_qh = cntl->bulk_qh = intr_qh;
Kevin O'Connor95714392010-02-17 22:59:53 -0500150 barrier();
Kevin O'Connor114592f2009-09-28 21:32:08 -0400151
152 // Set the frame length to the default: 1 ms exactly
Kevin O'Connor406fad62010-02-28 02:23:19 -0500153 outb(USBSOF_DEFAULT, cntl->iobase + USBSOF);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400154
155 // Store the frame list base address
Kevin O'Connor406fad62010-02-28 02:23:19 -0500156 outl((u32)fl->links, cntl->iobase + USBFLBASEADD);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400157
158 // Set the current frame number
Kevin O'Connor406fad62010-02-28 02:23:19 -0500159 outw(0, cntl->iobase + USBFRNUM);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400160
Kevin O'Connor114592f2009-09-28 21:32:08 -0400161 // Mark as configured and running with a 64-byte max packet.
Kevin O'Connor406fad62010-02-28 02:23:19 -0500162 outw(USBCMD_RS | USBCMD_CF | USBCMD_MAXP, cntl->iobase + USBCMD);
163
164 // Find devices
165 int count = check_uhci_ports(cntl);
166 free_pipe(cntl->usb.defaultpipe);
167 if (count)
168 // Success
169 return;
170
171 // No devices found - shutdown and free controller.
172 outw(0, cntl->iobase + USBCMD);
173fail:
174 free(term_td);
175 free(fl);
176 free(intr_qh);
177 free(term_qh);
Kevin O'Connor0770d672010-03-09 19:33:22 -0500178 free(cntl);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400179}
180
Kevin O'Connora5826b52009-10-24 17:57:29 -0400181void
Kevin O'Connor406fad62010-02-28 02:23:19 -0500182uhci_init(u16 bdf, int busid)
Kevin O'Connor114592f2009-09-28 21:32:08 -0400183{
184 if (! CONFIG_USB_UHCI)
Kevin O'Connora5826b52009-10-24 17:57:29 -0400185 return;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500186 struct usb_uhci_s *cntl = malloc_tmphigh(sizeof(*cntl));
187 memset(cntl, 0, sizeof(*cntl));
188 cntl->usb.busid = busid;
189 cntl->usb.type = USB_TYPE_UHCI;
190 cntl->iobase = (pci_config_readl(bdf, PCI_BASE_ADDRESS_4)
191 & PCI_BASE_ADDRESS_IO_MASK);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400192
Kevin O'Connor9dc243e2010-03-20 17:53:03 -0400193 dprintf(1, "UHCI init on dev %02x:%02x.%x (io=%x)\n"
Kevin O'Connor406fad62010-02-28 02:23:19 -0500194 , pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf)
195 , pci_bdf_to_fn(bdf), cntl->iobase);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400196
Kevin O'Connor406fad62010-02-28 02:23:19 -0500197 pci_config_maskw(bdf, PCI_COMMAND, 0, PCI_COMMAND_MASTER);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400198
Kevin O'Connor406fad62010-02-28 02:23:19 -0500199 reset_uhci(cntl, bdf);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400200
Kevin O'Connor406fad62010-02-28 02:23:19 -0500201 run_thread(configure_uhci, cntl);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400202}
203
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500204
205/****************************************************************
206 * End point communication
207 ****************************************************************/
208
Kevin O'Connor114592f2009-09-28 21:32:08 -0400209static int
Kevin O'Connor406fad62010-02-28 02:23:19 -0500210wait_qh(struct usb_uhci_s *cntl, struct uhci_qh *qh)
Kevin O'Connor114592f2009-09-28 21:32:08 -0400211{
212 // XXX - 500ms just a guess
213 u64 end = calc_future_tsc(500);
214 for (;;) {
215 if (qh->element & UHCI_PTR_TERM)
216 return 0;
Kevin O'Connor89eb6242009-10-22 22:30:37 -0400217 if (check_time(end)) {
Kevin O'Connorcfdc13f2010-02-14 13:07:54 -0500218 warn_timeout();
Kevin O'Connorfcc116f2009-10-30 23:16:07 -0400219 struct uhci_td *td = (void*)(qh->element & ~UHCI_PTR_BITS);
220 dprintf(1, "Timeout on wait_qh %p (td=%p s=%x c=%x/%x)\n"
221 , qh, td, td->status
Kevin O'Connor406fad62010-02-28 02:23:19 -0500222 , inw(cntl->iobase + USBCMD)
223 , inw(cntl->iobase + USBSTS));
Kevin O'Connor114592f2009-09-28 21:32:08 -0400224 return -1;
225 }
Kevin O'Connor229e3be2009-10-31 13:55:59 -0400226 yield();
Kevin O'Connor114592f2009-09-28 21:32:08 -0400227 }
228}
229
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500230// Wait for next USB frame to start - for ensuring safe memory release.
Kevin O'Connor95714392010-02-17 22:59:53 -0500231static void
Kevin O'Connor406fad62010-02-28 02:23:19 -0500232uhci_waittick(u16 iobase)
Kevin O'Connor95714392010-02-17 22:59:53 -0500233{
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500234 barrier();
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500235 u16 startframe = inw(iobase + USBFRNUM);
236 u64 end = calc_future_tsc(1000 * 5);
237 for (;;) {
238 if (inw(iobase + USBFRNUM) != startframe)
239 break;
240 if (check_time(end)) {
241 warn_timeout();
242 return;
243 }
244 yield();
245 }
246}
247
248struct uhci_pipe {
249 struct uhci_qh qh;
250 struct uhci_td *next_td;
251 struct usb_pipe pipe;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500252 u16 iobase;
Kevin O'Connor0770d672010-03-09 19:33:22 -0500253 u8 toggle;
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500254};
255
256void
257uhci_free_pipe(struct usb_pipe *p)
258{
259 if (! CONFIG_USB_UHCI)
260 return;
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500261 dprintf(7, "uhci_free_pipe %p\n", p);
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500262 struct uhci_pipe *pipe = container_of(p, struct uhci_pipe, pipe);
Kevin O'Connor406fad62010-02-28 02:23:19 -0500263 struct usb_uhci_s *cntl = container_of(
264 pipe->pipe.cntl, struct usb_uhci_s, usb);
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500265
Kevin O'Connor406fad62010-02-28 02:23:19 -0500266 struct uhci_qh *pos = (void*)(cntl->framelist->links[0] & ~UHCI_PTR_BITS);
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500267 for (;;) {
268 u32 link = pos->link;
269 if (link == UHCI_PTR_TERM) {
270 // Not found?! Exit without freeing.
271 warn_internalerror();
272 return;
273 }
274 struct uhci_qh *next = (void*)(link & ~UHCI_PTR_BITS);
275 if (next == &pipe->qh) {
276 pos->link = next->link;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500277 if (cntl->control_qh == next)
278 cntl->control_qh = pos;
279 if (cntl->bulk_qh == next)
280 cntl->bulk_qh = pos;
281 uhci_waittick(cntl->iobase);
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500282 free(pipe);
283 return;
284 }
285 pos = next;
286 }
287}
288
289struct usb_pipe *
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500290uhci_alloc_control_pipe(struct usb_pipe *dummy)
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500291{
292 if (! CONFIG_USB_UHCI)
293 return NULL;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500294 struct usb_uhci_s *cntl = container_of(
295 dummy->cntl, struct usb_uhci_s, usb);
296 dprintf(7, "uhci_alloc_control_pipe %p\n", &cntl->usb);
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500297
298 // Allocate a queue head.
299 struct uhci_pipe *pipe = malloc_tmphigh(sizeof(*pipe));
300 if (!pipe) {
301 warn_noalloc();
302 return NULL;
303 }
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500304 memset(pipe, 0, sizeof(*pipe));
Kevin O'Connor0770d672010-03-09 19:33:22 -0500305 memcpy(&pipe->pipe, dummy, sizeof(pipe->pipe));
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500306 pipe->qh.element = UHCI_PTR_TERM;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500307 pipe->iobase = cntl->iobase;
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500308
309 // Add queue head to controller list.
Kevin O'Connor406fad62010-02-28 02:23:19 -0500310 struct uhci_qh *control_qh = cntl->control_qh;
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500311 pipe->qh.link = control_qh->link;
312 barrier();
313 control_qh->link = (u32)&pipe->qh | UHCI_PTR_QH;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500314 if (cntl->bulk_qh == control_qh)
315 cntl->bulk_qh = &pipe->qh;
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500316 return &pipe->pipe;
Kevin O'Connor95714392010-02-17 22:59:53 -0500317}
318
Kevin O'Connor114592f2009-09-28 21:32:08 -0400319int
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500320uhci_control(struct usb_pipe *p, int dir, const void *cmd, int cmdsize
Kevin O'Connor114592f2009-09-28 21:32:08 -0400321 , void *data, int datasize)
322{
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500323 ASSERT32FLAT();
Kevin O'Connor114592f2009-09-28 21:32:08 -0400324 if (! CONFIG_USB_UHCI)
Kevin O'Connor1c46a542009-10-17 23:53:32 -0400325 return -1;
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500326 dprintf(5, "uhci_control %p\n", p);
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500327 struct uhci_pipe *pipe = container_of(p, struct uhci_pipe, pipe);
Kevin O'Connor406fad62010-02-28 02:23:19 -0500328 struct usb_uhci_s *cntl = container_of(
329 pipe->pipe.cntl, struct usb_uhci_s, usb);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400330
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500331 int maxpacket = pipe->pipe.maxpacket;
Kevin O'Connor190cc622010-03-09 19:43:52 -0500332 int lowspeed = pipe->pipe.speed;
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500333 int devaddr = pipe->pipe.devaddr | (pipe->pipe.ep << 7);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400334
335 // Setup transfer descriptors
336 int count = 2 + DIV_ROUND_UP(datasize, maxpacket);
337 struct uhci_td *tds = malloc_tmphigh(sizeof(*tds) * count);
Kevin O'Connor0770d672010-03-09 19:33:22 -0500338 if (!tds) {
339 warn_noalloc();
340 return -1;
341 }
Kevin O'Connor114592f2009-09-28 21:32:08 -0400342
343 tds[0].link = (u32)&tds[1] | UHCI_PTR_DEPTH;
344 tds[0].status = (uhci_maxerr(3) | (lowspeed ? TD_CTRL_LS : 0)
345 | TD_CTRL_ACTIVE);
346 tds[0].token = (uhci_explen(cmdsize) | (devaddr << TD_TOKEN_DEVADDR_SHIFT)
347 | USB_PID_SETUP);
348 tds[0].buffer = (void*)cmd;
349 int toggle = TD_TOKEN_TOGGLE;
350 int i;
351 for (i=1; i<count-1; i++) {
352 tds[i].link = (u32)&tds[i+1] | UHCI_PTR_DEPTH;
353 tds[i].status = (uhci_maxerr(3) | (lowspeed ? TD_CTRL_LS : 0)
354 | TD_CTRL_ACTIVE);
355 int len = (i == count-2 ? (datasize - (i-1)*maxpacket) : maxpacket);
356 tds[i].token = (uhci_explen(len) | toggle
357 | (devaddr << TD_TOKEN_DEVADDR_SHIFT)
358 | (dir ? USB_PID_IN : USB_PID_OUT));
359 tds[i].buffer = data + (i-1) * maxpacket;
360 toggle ^= TD_TOKEN_TOGGLE;
361 }
362 tds[i].link = UHCI_PTR_TERM;
363 tds[i].status = (uhci_maxerr(0) | (lowspeed ? TD_CTRL_LS : 0)
364 | TD_CTRL_ACTIVE);
365 tds[i].token = (uhci_explen(0) | TD_TOKEN_TOGGLE
366 | (devaddr << TD_TOKEN_DEVADDR_SHIFT)
367 | (dir ? USB_PID_OUT : USB_PID_IN));
368 tds[i].buffer = 0;
369
370 // Transfer data
Kevin O'Connor95714392010-02-17 22:59:53 -0500371 barrier();
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500372 pipe->qh.element = (u32)&tds[0];
373 int ret = wait_qh(cntl, &pipe->qh);
Kevin O'Connorad901592009-12-13 11:25:25 -0500374 if (ret) {
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500375 pipe->qh.element = UHCI_PTR_TERM;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500376 uhci_waittick(pipe->iobase);
Kevin O'Connorad901592009-12-13 11:25:25 -0500377 }
378 free(tds);
Kevin O'Connor95714392010-02-17 22:59:53 -0500379 return ret;
Kevin O'Connor114592f2009-09-28 21:32:08 -0400380}
381
Kevin O'Connor59f02832009-10-12 10:09:15 -0400382struct usb_pipe *
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500383uhci_alloc_bulk_pipe(struct usb_pipe *dummy)
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500384{
385 if (! CONFIG_USB_UHCI)
386 return NULL;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500387 struct usb_uhci_s *cntl = container_of(
388 dummy->cntl, struct usb_uhci_s, usb);
389 dprintf(7, "uhci_alloc_bulk_pipe %p\n", &cntl->usb);
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500390
391 // Allocate a queue head.
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500392 struct uhci_pipe *pipe = malloc_low(sizeof(*pipe));
393 if (!pipe) {
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500394 warn_noalloc();
395 return NULL;
396 }
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500397 memset(pipe, 0, sizeof(*pipe));
Kevin O'Connor0770d672010-03-09 19:33:22 -0500398 memcpy(&pipe->pipe, dummy, sizeof(pipe->pipe));
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500399 pipe->qh.element = UHCI_PTR_TERM;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500400 pipe->iobase = cntl->iobase;
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500401
402 // Add queue head to controller list.
Kevin O'Connor406fad62010-02-28 02:23:19 -0500403 struct uhci_qh *bulk_qh = cntl->bulk_qh;
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500404 pipe->qh.link = bulk_qh->link;
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500405 barrier();
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500406 bulk_qh->link = (u32)&pipe->qh | UHCI_PTR_QH;
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500407
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500408 return &pipe->pipe;
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500409}
410
411static int
412wait_td(struct uhci_td *td)
413{
414 u64 end = calc_future_tsc(5000); // XXX - lookup real time.
415 u32 status;
416 for (;;) {
417 status = td->status;
418 if (!(status & TD_CTRL_ACTIVE))
419 break;
420 if (check_time(end)) {
421 warn_timeout();
422 return -1;
423 }
424 yield();
425 }
426 if (status & TD_CTRL_ANY_ERROR) {
427 dprintf(1, "wait_td error - status=%x\n", status);
428 return -2;
429 }
430 return 0;
431}
432
433#define STACKTDS 4
434#define TDALIGN 16
435
436int
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500437uhci_send_bulk(struct usb_pipe *p, int dir, void *data, int datasize)
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500438{
Kevin O'Connor0770d672010-03-09 19:33:22 -0500439 if (! CONFIG_USB_UHCI)
440 return -1;
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500441 struct uhci_pipe *pipe = container_of(p, struct uhci_pipe, pipe);
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500442 dprintf(7, "uhci_send_bulk qh=%p dir=%d data=%p size=%d\n"
443 , &pipe->qh, dir, data, datasize);
444 int maxpacket = GET_FLATPTR(pipe->pipe.maxpacket);
Kevin O'Connor190cc622010-03-09 19:43:52 -0500445 int lowspeed = GET_FLATPTR(pipe->pipe.speed);
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500446 int devaddr = (GET_FLATPTR(pipe->pipe.devaddr)
447 | (GET_FLATPTR(pipe->pipe.ep) << 7));
Kevin O'Connor0770d672010-03-09 19:33:22 -0500448 int toggle = GET_FLATPTR(pipe->toggle) ? TD_TOKEN_TOGGLE : 0;
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500449
450 // Allocate 4 tds on stack (16byte aligned)
451 u8 tdsbuf[sizeof(struct uhci_td) * STACKTDS + TDALIGN - 1];
452 struct uhci_td *tds = (void*)ALIGN((u32)tdsbuf, TDALIGN);
453 memset(tds, 0, sizeof(*tds) * STACKTDS);
454
455 // Enable tds
Kevin O'Connor0770d672010-03-09 19:33:22 -0500456 barrier();
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500457 SET_FLATPTR(pipe->qh.element, (u32)MAKE_FLATPTR(GET_SEG(SS), tds));
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500458
459 int tdpos = 0;
460 while (datasize) {
461 struct uhci_td *td = &tds[tdpos++ % STACKTDS];
462 int ret = wait_td(td);
463 if (ret)
464 goto fail;
465
466 int transfer = datasize;
467 if (transfer > maxpacket)
468 transfer = maxpacket;
469 struct uhci_td *nexttd_fl = MAKE_FLATPTR(GET_SEG(SS)
470 , &tds[tdpos % STACKTDS]);
471 td->link = (transfer==datasize ? UHCI_PTR_TERM : (u32)nexttd_fl);
472 td->token = (uhci_explen(transfer) | toggle
473 | (devaddr << TD_TOKEN_DEVADDR_SHIFT)
474 | (dir ? USB_PID_IN : USB_PID_OUT));
475 td->buffer = data;
476 barrier();
477 td->status = (uhci_maxerr(3) | (lowspeed ? TD_CTRL_LS : 0)
478 | TD_CTRL_ACTIVE);
479 toggle ^= TD_TOKEN_TOGGLE;
480
481 data += transfer;
482 datasize -= transfer;
483 }
484 int i;
485 for (i=0; i<STACKTDS; i++) {
486 struct uhci_td *td = &tds[tdpos++ % STACKTDS];
487 int ret = wait_td(td);
488 if (ret)
489 goto fail;
490 }
491
Kevin O'Connor0770d672010-03-09 19:33:22 -0500492 SET_FLATPTR(pipe->toggle, !!toggle);
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500493 return 0;
494fail:
495 dprintf(1, "uhci_send_bulk failed\n");
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500496 SET_FLATPTR(pipe->qh.element, UHCI_PTR_TERM);
Kevin O'Connor406fad62010-02-28 02:23:19 -0500497 uhci_waittick(GET_FLATPTR(pipe->iobase));
Kevin O'Connor7149fc82010-02-17 23:24:42 -0500498 return -1;
499}
500
501struct usb_pipe *
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500502uhci_alloc_intr_pipe(struct usb_pipe *dummy, int frameexp)
Kevin O'Connor114592f2009-09-28 21:32:08 -0400503{
504 if (! CONFIG_USB_UHCI)
505 return NULL;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500506 struct usb_uhci_s *cntl = container_of(
507 dummy->cntl, struct usb_uhci_s, usb);
508 dprintf(7, "uhci_alloc_intr_pipe %p %d\n", &cntl->usb, frameexp);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400509
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500510 if (frameexp > 10)
511 frameexp = 10;
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500512 int maxpacket = dummy->maxpacket;
Kevin O'Connor190cc622010-03-09 19:43:52 -0500513 int lowspeed = dummy->speed;
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500514 int devaddr = dummy->devaddr | (dummy->ep << 7);
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500515 // Determine number of entries needed for 2 timer ticks.
516 int ms = 1<<frameexp;
517 int count = DIV_ROUND_UP(PIT_TICK_INTERVAL * 1000 * 2, PIT_TICK_RATE * ms);
Kevin O'Connor0770d672010-03-09 19:33:22 -0500518 count = ALIGN(count, 2);
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500519 struct uhci_pipe *pipe = malloc_low(sizeof(*pipe));
Kevin O'Connor114592f2009-09-28 21:32:08 -0400520 struct uhci_td *tds = malloc_low(sizeof(*tds) * count);
Kevin O'Connor09e2f7c2010-02-27 23:50:48 -0500521 void *data = malloc_low(maxpacket * count);
522 if (!pipe || !tds || !data) {
Kevin O'Connor95714392010-02-17 22:59:53 -0500523 warn_noalloc();
524 goto fail;
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500525 }
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500526 memset(pipe, 0, sizeof(*pipe));
Kevin O'Connor0770d672010-03-09 19:33:22 -0500527 memcpy(&pipe->pipe, dummy, sizeof(pipe->pipe));
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500528 pipe->qh.element = (u32)tds;
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500529 pipe->next_td = &tds[0];
Kevin O'Connor406fad62010-02-28 02:23:19 -0500530 pipe->iobase = cntl->iobase;
Kevin O'Connor4547eb92010-02-28 02:17:28 -0500531
Kevin O'Connor114592f2009-09-28 21:32:08 -0400532 int toggle = 0;
533 int i;
534 for (i=0; i<count; i++) {
535 tds[i].link = (i==count-1 ? (u32)&tds[0] : (u32)&tds[i+1]);
536 tds[i].status = (uhci_maxerr(3) | (lowspeed ? TD_CTRL_LS : 0)
537 | TD_CTRL_ACTIVE);
538 tds[i].token = (uhci_explen(maxpacket) | toggle
539 | (devaddr << TD_TOKEN_DEVADDR_SHIFT)
540 | USB_PID_IN);
Kevin O'Connor09e2f7c2010-02-27 23:50:48 -0500541 tds[i].buffer = data + maxpacket * i;
Kevin O'Connor114592f2009-09-28 21:32:08 -0400542 toggle ^= TD_TOKEN_TOGGLE;
543 }
544
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500545 // Add to interrupt schedule.
Kevin O'Connor406fad62010-02-28 02:23:19 -0500546 struct uhci_framelist *fl = cntl->framelist;
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500547 if (frameexp == 0) {
548 // Add to existing interrupt entry.
549 struct uhci_qh *intr_qh = (void*)(fl->links[0] & ~UHCI_PTR_BITS);
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500550 pipe->qh.link = intr_qh->link;
Kevin O'Connor95714392010-02-17 22:59:53 -0500551 barrier();
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500552 intr_qh->link = (u32)&pipe->qh | UHCI_PTR_QH;
Kevin O'Connor406fad62010-02-28 02:23:19 -0500553 if (cntl->control_qh == intr_qh)
554 cntl->control_qh = &pipe->qh;
555 if (cntl->bulk_qh == intr_qh)
556 cntl->bulk_qh = &pipe->qh;
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500557 } else {
558 int startpos = 1<<(frameexp-1);
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500559 pipe->qh.link = fl->links[startpos];
Kevin O'Connor95714392010-02-17 22:59:53 -0500560 barrier();
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500561 for (i=startpos; i<ARRAY_SIZE(fl->links); i+=ms)
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500562 fl->links[i] = (u32)&pipe->qh | UHCI_PTR_QH;
Kevin O'Connor991eaff2010-02-13 21:51:47 -0500563 }
Kevin O'Connor114592f2009-09-28 21:32:08 -0400564
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500565 return &pipe->pipe;
Kevin O'Connor95714392010-02-17 22:59:53 -0500566fail:
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500567 free(pipe);
Kevin O'Connor95714392010-02-17 22:59:53 -0500568 free(tds);
Kevin O'Connor09e2f7c2010-02-27 23:50:48 -0500569 free(data);
Kevin O'Connor95714392010-02-17 22:59:53 -0500570 return NULL;
Kevin O'Connor114592f2009-09-28 21:32:08 -0400571}
572
573int
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500574uhci_poll_intr(struct usb_pipe *p, void *data)
Kevin O'Connor114592f2009-09-28 21:32:08 -0400575{
576 ASSERT16();
577 if (! CONFIG_USB_UHCI)
578 return -1;
579
Kevin O'Connor357bdfa2010-02-26 08:57:13 -0500580 struct uhci_pipe *pipe = container_of(p, struct uhci_pipe, pipe);
581 struct uhci_td *td = GET_FLATPTR(pipe->next_td);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400582 u32 status = GET_FLATPTR(td->status);
583 u32 token = GET_FLATPTR(td->token);
584 if (status & TD_CTRL_ACTIVE)
585 // No intrs found.
586 return -1;
587 // XXX - check for errors.
588
589 // Copy data.
Kevin O'Connor09e2f7c2010-02-27 23:50:48 -0500590 void *tddata = GET_FLATPTR(td->buffer);
Kevin O'Connor114592f2009-09-28 21:32:08 -0400591 memcpy_far(GET_SEG(SS), data
Kevin O'Connor09e2f7c2010-02-27 23:50:48 -0500592 , FLATPTR_TO_SEG(tddata), (void*)FLATPTR_TO_OFFSET(tddata)
Kevin O'Connor114592f2009-09-28 21:32:08 -0400593 , uhci_expected_length(token));
594
595 // Reenable this td.
Kevin O'Connor09e2f7c2010-02-27 23:50:48 -0500596 struct uhci_td *next = (void*)(GET_FLATPTR(td->link) & ~UHCI_PTR_BITS);
597 SET_FLATPTR(pipe->next_td, next);
Kevin O'Connor95714392010-02-17 22:59:53 -0500598 barrier();
Kevin O'Connor114592f2009-09-28 21:32:08 -0400599 SET_FLATPTR(td->status, (uhci_maxerr(0) | (status & TD_CTRL_LS)
600 | TD_CTRL_ACTIVE));
Kevin O'Connor114592f2009-09-28 21:32:08 -0400601
602 return 0;
603}