2 * Universal Host Controller Interface driver
5 * Better (any) root hub handling
11 #include <kernel/bitmap.h>
12 #include "threads/pte.h"
13 #include "threads/malloc.h"
14 #include "threads/palloc.h"
15 #include "threads/synch.h"
16 #include "threads/interrupt.h"
17 #include "threads/thread.h"
18 #include "devices/pci.h"
19 #include "devices/usb.h"
20 #include "devices/timer.h"
22 #define UHCI_MAX_PORTS 8
24 #define FRAME_LIST_ENTRIES 1024
25 #define TD_ENTRIES (4096/32) /* number of entries allocated */
26 #define QH_ENTRIES (4096/16)
28 /* uhci pci registers */
29 #define UHCI_REG_USBCMD 0x00 /* Command */
30 #define UHCI_REG_USBSTS 0x02 /* Status */
31 #define UHCI_REG_USBINTR 0x04 /* interrupt enable */
32 #define UHCI_REG_FRNUM 0x06 /* frame number */
33 #define UHCI_REG_FLBASEADD 0x08 /* frame list base address */
34 #define UHCI_REG_SOFMOD 0x0c /* start of frame modify */
35 #define UHCI_REG_PORTSC1 0x10 /* port 1 status/control */
36 #define UHCI_REG_PORTSC2 0x12 /* port 2 status/control */
37 #define UHCI_REGSZ 0x20 /* register iospace size */
39 /* in PCI config space for some reason */
40 #define UHCI_REG_LEGSUP 0xC0
43 /* command register */
44 #define USB_CMD_MAX_PACKET (1 << 7)
45 #define USB_CMD_CONFIGURE (1 << 6)
46 #define USB_CMD_FGR (1 << 4) /* force global resume */
47 #define USB_CMD_EGSM (1 << 3) /* global suspend mode */
48 #define USB_CMD_GRESET (1 << 2) /* global reset */
49 #define USB_CMD_HCRESET (1 << 1) /* host controller reset */
50 #define USB_CMD_RS (1 << 0) /* run/stop */
53 #define USB_STATUS_HALTED (1 << 5)
54 #define USB_STATUS_PROCESSERR (1 << 4)
55 #define USB_STATUS_HOSTERR (1 << 3)
56 #define USB_STATUS_RESUME (1 << 2)
57 #define USB_STATUS_INTERR (1 << 1)
58 #define USB_STATUS_USBINT (1 << 0)
60 /* interrupt enable register */
61 #define USB_INTR_SHORT (1 << 3) /* enable short packets */
62 #define USB_INTR_IOC (1 << 2) /* interrupt on complete */
63 #define USB_INTR_RESUME (1 << 1) /* resume interrupt enable */
64 #define USB_INTR_TIMEOUT (1 << 0) /* timeout int enable */
66 /* port control register */
67 #define USB_PORT_SUSPEND (1 << 12)
68 #define USB_PORT_RESET (1 << 9)
69 #define USB_PORT_LOWSPEED (1 << 8)
70 #define USB_PORT_RESUMED (1 << 6) /* resume detected */
71 #define USB_PORT_CHANGE (1 << 3) /* enable change */
72 #define USB_PORT_ENABLE (1 << 2) /* enable the port */
73 #define USB_PORT_CONNECTCHG (1 << 1) /* connect status changed */
74 #define USB_PORT_CONNECTSTATUS (1 << 0) /* device is connected */
76 #define ptr_to_flp(x) (((uintptr_t)x) >> 4)
77 #define flp_to_ptr(x) (uintptr_t)(((uintptr_t)x) << 4)
79 /* frame structures */
85 uint32_t depth_select:1; /* only for TD */
86 uint32_t resv:1; /* zero */
87 uint32_t flp:28; /* frame list pointer */
92 uint32_t pid:8; /* packet id */
93 uint32_t dev_addr:7; /* device address */
95 uint32_t data_toggle:1;
97 uint32_t maxlen:11; /* maximum pkt length */
102 uint32_t actual_len:11;
105 /* status information */
111 uint32_t buffer_error:1;
116 uint32_t ioc:1; /* issue int on complete */
117 uint32_t ios:1; /* isochronous select */
118 uint32_t ls:1; /* low speed device */
119 uint32_t error_limit:2; /* errors before interrupt */
120 uint32_t spd:1; /* short packet detect */
124 #define TD_FL_ASYNC 1
125 #define TD_FL_USED 0x80000000
129 struct frame_list_ptr flp;
130 struct td_control control;
131 struct td_token token;
135 struct frame_list_ptr *head; /* for fast removal */
141 struct frame_list_ptr qhlp; /* queue head link pointer */
142 struct frame_list_ptr qelp; /* queue elem link pointer */
149 struct pci_io *io; /* pci io space */
151 struct frame_list_ptr *frame_list; /* page aligned frame list */
153 struct tx_descriptor *td_pool;
154 struct bitmap *td_used;
155 struct queue_head *qh_pool;
156 struct bitmap *qh_used;
159 uint8_t attached_ports;
161 int timeouts; /* number of timeouts */
163 struct semaphore td_sem;
164 struct list devices; /* devices on host */
165 struct list waiting; /* threads waiting */
170 struct tx_descriptor *td;
171 struct uhci_dev_info *ud;
172 struct semaphore sem;
173 struct list_elem peers;
178 struct uhci_info *ui; /* owner */
179 bool low_speed; /* whether device is low speed */
180 int dev_addr; /* device address */
181 int errors; /* aggregate errors */
182 struct list_elem peers; /* next dev on host */
184 struct queue_head *qh;
189 struct uhci_dev_info *ud;
191 int maxpkt; /* max packet size */
192 int toggle; /* data toggle bit for bulk transfers */
195 #define uhci_lock(x) lock_acquire(&(x)->lock)
196 #define uhci_unlock(x) lock_release(&(x)->lock)
197 #define dev_lock(x) lock_acquire(&(x)->lock)
198 #define dev_unlock(x) lock_release(&(x)->lock)
201 static int token_to_pid (int token);
203 static int uhci_tx_pkt (host_eop_info eop, int token, void *pkt,
204 int min_sz, int max_sz, int *in_sz, bool wait);
206 static int uhci_detect_change (host_info);
209 static int uhci_tx_pkt_now (struct uhci_eop_info *ue, int token, void *pkt,
211 static int uhci_tx_pkt_wait (struct uhci_eop_info *ue, int token, void *pkt,
212 int max_sz, int *in_sz);
213 static int uhci_tx_pkt_bulk (struct uhci_eop_info *ue, int token, void *buf,
217 static int uhci_process_completed (struct uhci_info *ui);
219 static struct tx_descriptor *uhci_acquire_td (struct uhci_info *);
220 static void uhci_release_td (struct uhci_info *, struct tx_descriptor *);
221 static void uhci_remove_qh (struct uhci_info *ui, struct queue_head *qh);
224 static void qh_free (struct uhci_info *ui, struct queue_head *qh);
225 static struct queue_head *qh_alloc (struct uhci_info *ui);
227 static struct uhci_info *uhci_create_info (struct pci_io *io);
228 static void uhci_destroy_info (struct uhci_info *ui);
229 static host_eop_info uhci_create_eop (host_dev_info hd, int eop, int maxpkt);
230 static void uhci_remove_eop (host_eop_info hei);
231 static host_dev_info uhci_create_chan (host_info hi, int dev_addr, int ver);
232 static void uhci_destroy_chan (host_dev_info);
233 static void uhci_modify_chan (host_dev_info, int dev_addr, int ver);
234 static void uhci_set_toggle (host_eop_info, int toggle);
236 static struct tx_descriptor *td_from_pool (struct uhci_info *ui, int idx);
238 static int check_and_flip_change (struct uhci_info *ui, int reg);
239 static void uhci_stop (struct uhci_info *ui);
240 static void uhci_run (struct uhci_info *ui);
241 static void uhci_stop_unlocked (struct uhci_info *ui);
242 static void uhci_run_unlocked (struct uhci_info *ui);
243 #define uhci_is_stopped(x) (pci_reg_read16((x)->io, UHCI_REG_USBSTS) \
245 #define uhci_port_enabled(x, y) (pci_reg_read16((x)->io, (y)) & USB_PORT_ENABLE)
246 static void uhci_add_td_to_qh (struct queue_head *qh,
247 struct tx_descriptor *td);
248 static void uhci_remove_error_td (struct tx_descriptor *td);
249 static void uhci_setup_td (struct tx_descriptor *td, int dev_addr, int token,
250 int eop, void *pkt, int sz, int toggle, bool ls);
251 static int uhci_enable_port (struct uhci_info *ui, int port);
252 static void uhci_irq (void *uhci_data);
253 static void uhci_detect_ports (struct uhci_info *ui);
255 static int uhci_remove_stalled (struct uhci_info *ui);
256 static void uhci_stall_watchdog (struct uhci_info *ui);
258 static void dump_all_qh (struct uhci_info *ui);
259 static void dump_qh (struct queue_head *qh);
261 static void dump_regs (struct uhci_info *ui);
263 void uhci_init (void);
266 static struct usb_host uhci_host = {
268 .tx_pkt = uhci_tx_pkt,
269 .detect_change = uhci_detect_change,
270 .create_dev_channel = uhci_create_chan,
271 .remove_dev_channel = uhci_destroy_chan,
272 .modify_dev_channel = uhci_modify_chan,
273 .set_toggle = uhci_set_toggle,
274 .create_eop = uhci_create_eop,
275 .remove_eop = uhci_remove_eop
285 while ((pd = pci_get_dev_by_class (PCI_MAJOR_SERIALBUS, PCI_MINOR_USB,
286 PCI_USB_IFACE_UHCI, dev_num)) != NULL)
289 struct uhci_info *ui;
296 while ((io = pci_io_enum (pd, io)) != NULL)
298 if (pci_io_size (io) == UHCI_REGSZ)
302 /* not found, next PCI */
306 ui = uhci_create_info (io);
309 uhci_detect_ports (ui);
311 pci_write_config16 (ui->dev, UHCI_REG_LEGSUP, 0x8f00);
312 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, USB_CMD_HCRESET);
313 asm volatile ("mfence":::"memory");
315 if (pci_reg_read16 (ui->io, UHCI_REG_USBCMD) & USB_CMD_HCRESET)
316 printf ("reset failed!\n");
317 pci_reg_write16 (ui->io, UHCI_REG_USBINTR, 0);
318 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, 0);
320 pci_reg_write16 (ui->io, UHCI_REG_PORTSC1, 0);
321 pci_reg_write16 (ui->io, UHCI_REG_PORTSC2, 0);
323 pci_reg_write8 (ui->io, UHCI_REG_SOFMOD, 64);
324 pci_reg_write32 (ui->io, UHCI_REG_FLBASEADD, vtop (ui->frame_list));
325 pci_reg_write16 (ui->io, UHCI_REG_FRNUM, 0);
326 asm volatile ("mfence":::"memory");
328 /* deactivate SMM junk, only enable IRQ */
329 pci_write_config16 (ui->dev, UHCI_REG_LEGSUP, 0x2000);
331 asm volatile ("mfence":::"memory");
333 pci_reg_write16 (ui->io, UHCI_REG_USBCMD,
334 USB_CMD_RS | USB_CMD_CONFIGURE | USB_CMD_MAX_PACKET);
335 pci_reg_write16 (ui->io, UHCI_REG_USBINTR,
336 USB_INTR_SHORT | USB_INTR_IOC |
337 USB_INTR_TIMEOUT | USB_INTR_RESUME);
339 asm volatile ("mfence":::"memory");
341 printf ("UHCI: Enabling %d root ports\n", ui->num_ports);
342 ui->attached_ports = 0;
343 for (i = 0; i < ui->num_ports; i++)
344 ui->attached_ports += uhci_enable_port (ui, i);
346 pci_register_irq (pd, uhci_irq, ui);
348 usb_register_host (&uhci_host, ui);
352 #define UHCI_PORT_TIMEOUT 1000
354 uhci_enable_port (struct uhci_info *ui, int idx)
357 int time, stable_since;
361 port = UHCI_REG_PORTSC1 + idx * 2;
365 for (time = 0; ; time += 25)
368 new_status = pci_reg_read16 (ui->io, port);
369 if (status != (new_status & USB_PORT_CONNECTSTATUS)
370 || new_status & USB_PORT_CONNECTCHG)
372 if (new_status & USB_PORT_CONNECTCHG)
373 pci_reg_write16 (ui->io, port, (new_status & ~0xe80a) | USB_PORT_CONNECTCHG);
375 status = new_status & USB_PORT_CONNECTSTATUS;
377 else if (time - stable_since >= 100)
379 else if (time >= 1500)
384 if (!(status & USB_PORT_CONNECTSTATUS))
387 for (count = 0; count < 3; count++)
389 status = pci_reg_read16 (ui->io, port) & ~0xe80a;
390 pci_reg_write16 (ui->io, port, status | USB_PORT_RESET);
393 status = pci_reg_read16 (ui->io, port) & ~0xe80a;
394 pci_reg_write16 (ui->io, port, status & ~USB_PORT_RESET);
397 status = pci_reg_read16 (ui->io, port) & ~0xe80a;
398 pci_reg_write16 (ui->io, port, status & ~(USB_PORT_CONNECTCHG | USB_PORT_CHANGE));
400 status = pci_reg_read16 (ui->io, port) & ~0xe80a;
401 pci_reg_write16 (ui->io, port, status | USB_PORT_ENABLE);
403 status = pci_reg_read16 (ui->io, port);
404 if (status & USB_PORT_ENABLE)
408 if (!(status & USB_PORT_CONNECTSTATUS))
410 pci_reg_write16 (ui->io, port, 0);
419 dump_regs (struct uhci_info *ui)
421 int regs[] = { 0, 2, 4, 6, 8, 0xc, 0x10, 0x12 };
422 int sz[] = { 2, 2, 2, 2, 4, 2, 2, 2 };
424 { "cmd", "sts", "intr", "frnum", "base", "sofmod", "portsc1", "portsc2" };
426 printf ("UHCI registers:\n");
427 for (i = 0; i < 8; i++)
429 printf ("%s: %x\n", name[i], (sz[i] == 2) ?
430 pci_reg_read16 (ui->io, regs[i]) :
431 pci_reg_read32 (ui->io, regs[i]));
438 uhci_destroy_info (struct uhci_info *ui)
440 palloc_free_page (ui->frame_list);
441 palloc_free_page (ui->td_pool);
442 palloc_free_page (ui->qh_pool);
443 bitmap_destroy (ui->qh_used);
444 bitmap_destroy (ui->td_used);
448 static struct uhci_info *
449 uhci_create_info (struct pci_io *io)
451 struct uhci_info *ui;
454 ui = malloc (sizeof (struct uhci_info));
457 lock_init (&ui->lock);
459 /* create an empty schedule */
460 ui->frame_list = palloc_get_page (PAL_ASSERT | PAL_NOCACHE);
461 memset (ui->frame_list, 0, PGSIZE);
462 for (i = 0; i < FRAME_LIST_ENTRIES; i++)
463 ui->frame_list[i].terminate = 1;
465 /* permit 3 timeouts */
467 // thread_create ("uhci watchdog", PRI_MIN,
468 // (thread_func *) uhci_stall_watchdog, ui);
469 ui->td_pool = palloc_get_page (PAL_ASSERT | PAL_NOCACHE);
470 ui->td_used = bitmap_create (TD_ENTRIES);
471 ui->qh_pool = palloc_get_page (PAL_ASSERT | PAL_NOCACHE);
472 ui->qh_used = bitmap_create (QH_ENTRIES);
473 sema_init (&ui->td_sem, TD_ENTRIES);
475 list_init (&ui->devices);
476 list_init (&ui->waiting);
483 uhci_tx_pkt (host_eop_info hei, int token, void *pkt, int min_sz,
484 int max_sz, int *in_sz, bool wait)
486 struct uhci_eop_info *ue;
487 struct uhci_dev_info *ud;
489 ASSERT (min_sz <= max_sz);
491 /* can't have page overlap */
495 ASSERT (pg_no (pkt + max_sz - 1) == pg_no (pkt));
501 /* don't bother if ports are down */
502 if (ud->ui->attached_ports == 0)
504 return USB_HOST_ERR_NODEV;
507 /* setup token acts to synchronize data toggle */
508 if (token == USB_TOKEN_SETUP)
513 return uhci_tx_pkt_bulk (ue, token, pkt, max_sz, in_sz);
521 return uhci_tx_pkt_now (ue, token, pkt, max_sz);
525 return uhci_tx_pkt_wait (ue, token, pkt, max_sz, in_sz);
533 uhci_tx_pkt_bulk (struct uhci_eop_info *ue, int token, void *buf,
536 /* XXX this can be made to use async packets */
540 /* send data in max_pkt sized chunks */
549 to_tx = (left > ue->maxpkt) ? ue->maxpkt : left;
550 wait_on_pkt = (left <= to_tx) ? true : false;
553 err = uhci_tx_pkt (ue, token, buf + bytes, 0, to_tx, &pkt_txed,
568 return USB_HOST_ERR_NONE;
572 token_to_pid (int token)
576 case USB_TOKEN_SETUP:
577 return USB_PID_SETUP;
583 PANIC ("Unknown USB token\n");
588 uhci_setup_td (struct tx_descriptor *td, int dev_addr, int token,
589 int eop, void *pkt, int sz, int toggle, bool ls)
591 td->buf_ptr = (sz == 0) ? 0 : vtop (pkt);
593 td->token.pid = token_to_pid (token);
594 td->token.dev_addr = dev_addr;
595 td->token.end_point = eop;
596 td->token.data_toggle = toggle;
597 td->token.maxlen = sz - 1;
598 // td->control.ls = ls;
600 td->control.actual_len = 0;
601 td->control.active = 1;
602 td->flp.qh_select = 0;
603 td->flp.depth_select = 0;
605 /* kill packet if too many errors */
606 td->control.error_limit = 3;
610 uhci_tx_pkt_now (struct uhci_eop_info *ue, int token, void *pkt, int sz)
612 struct tx_descriptor *td;
613 struct uhci_dev_info *ud;
619 td = uhci_acquire_td (ud->ui);
620 memset (td, 0, sizeof (struct tx_descriptor));
621 uhci_setup_td (td, ud->dev_addr, token, ue->eop, pkt, sz, ue->toggle,
627 uhci_add_td_to_qh (ud->qh, td);
628 td->flags = TD_FL_ASYNC | TD_FL_USED;
631 uhci_unlock (ud->ui);
634 return USB_HOST_ERR_NONE;
638 uhci_tx_pkt_wait (struct uhci_eop_info *ue, int token, void *pkt,
639 int max_sz, int *in_sz)
641 enum intr_level old_lvl;
642 struct tx_descriptor *td;
645 struct uhci_dev_info *ud;
652 td = uhci_acquire_td (ud->ui);
653 memset (td, 0, sizeof (struct tx_descriptor));
655 uhci_setup_td (td, ud->dev_addr, token, ue->eop, pkt, max_sz, ue->toggle,
661 sema_init (&w.sem, 0);
665 /* put into device's queue and add to waiting packet list */
666 uhci_add_td_to_qh (ud->qh, td);
667 td->flags = TD_FL_USED;
669 list_push_back (&ud->ui->waiting, &w.peers);
671 /* reactivate controller and wait */
672 old_lvl = intr_disable ();
674 uhci_unlock (ud->ui);
676 intr_set_level (old_lvl);
680 if (w.td->control.actual_len == 0x7ff)
683 *in_sz = w.td->control.actual_len + 1;
686 if (w.td->control.bitstuff)
687 err = USB_HOST_ERR_BITSTUFF;
688 else if (w.td->control.timeout)
689 err = USB_HOST_ERR_TIMEOUT;
690 else if (w.td->control.nak)
691 err = USB_HOST_ERR_NAK;
692 else if (w.td->control.babble)
693 err = USB_HOST_ERR_BABBLE;
694 else if (w.td->control.buffer_error)
695 err = USB_HOST_ERR_BUFFER;
696 else if (w.td->control.stalled)
697 err = USB_HOST_ERR_STALL;
700 err = USB_HOST_ERR_NONE;
704 uhci_release_td (ud->ui, td);
707 printf ("%s to device %d:\n",
708 token == USB_TOKEN_OUT ? "OUT"
709 : token == USB_TOKEN_IN ? "IN"
710 : token == USB_TOKEN_SETUP ? "SETUP"
713 n = (w.td->control.actual_len + 1) & 0x7ff;
714 hex_dump (0, pkt, n, true);
716 printf ("tx_pkt_wait: err=%d\n", err);
723 uhci_add_td_to_qh (struct queue_head *qh, struct tx_descriptor *td)
725 struct frame_list_ptr *fp;
729 td->head = &qh->qelp;
730 if (qh->qelp.terminate == 1)
733 td->flp.terminate = 1;
736 qh->qelp.flp = ptr_to_flp (vtop (td));
737 qh->qelp.terminate = 0;
741 /* find the last element in the queue */
742 fp = ptov (flp_to_ptr (qh->qelp.flp));
743 ASSERT (qh->qelp.terminate == 0);
744 while (!fp->terminate)
746 fp = ptov (flp_to_ptr (fp->flp));
749 /* set TD to terminated ptr */
753 fp->depth_select = 0;
754 fp->flp = ptr_to_flp (vtop (td));
761 uhci_irq (void *uhci_data)
763 struct uhci_info *ui;
767 status = pci_reg_read16 (ui->io, UHCI_REG_USBSTS);
768 if (status & USB_STATUS_PROCESSERR)
772 PANIC ("UHCI: Malformed schedule");
774 else if (status & USB_STATUS_HOSTERR)
778 PANIC ("UHCI: Host system error");
780 else if (status & USB_STATUS_INTERR)
783 pci_reg_write16 (ui->io, UHCI_REG_USBSTS, USB_STATUS_INTERR);
786 if (status & USB_STATUS_USBINT)
788 /* turn off interrupt */
789 uhci_stop_unlocked (ui);
790 pci_reg_write16 (ui->io, UHCI_REG_USBSTS, USB_STATUS_USBINT);
791 uhci_process_completed (ui);
792 uhci_run_unlocked (ui);
797 uhci_process_completed (struct uhci_info *ui)
799 struct list_elem *li;
803 li = list_begin (&ui->waiting);
804 while (li != list_end (&ui->waiting))
807 struct list_elem *next;
809 next = list_next (li);
810 uw = list_entry (li, struct usb_wait, peers);
812 if (!uw->td->control.active)
815 if (uw->td->control.error_limit == 0 || uw->td->control.stalled)
817 uhci_remove_error_td (uw->td);
826 /* must be a completed async TD.. */
827 /* is this too time consuming? I hope not */
831 while (start < TD_ENTRIES)
833 struct tx_descriptor *td;
835 start = bitmap_scan (ui->td_used, start, 1, true);
836 if (start == BITMAP_ERROR)
839 td = td_from_pool (ui, start);
841 if (!td->control.active && (td->flags & TD_FL_ASYNC) &&
842 (td->flags & TD_FL_USED))
844 if (td->control.error_limit == 0 || td->control.stalled)
846 uhci_remove_error_td (td);
848 uhci_release_td (ui, td);
858 uhci_remove_error_td (struct tx_descriptor *td)
860 struct frame_list_ptr *fp;
863 ASSERT (td->head != NULL);
866 td_flp = ptr_to_flp (vtop (td));
867 while (fp->flp != td_flp)
869 ASSERT (fp->terminate == 0);
870 fp = ptov (flp_to_ptr (fp->flp));
876 uhci_detect_change (host_info hi)
878 struct uhci_info *ui;
885 for (i = 0; i < ui->num_ports; i++)
887 change = check_and_flip_change (ui, i);
897 check_and_flip_change (struct uhci_info *ui, int port)
902 reg = UHCI_REG_PORTSC1 + port * 2;
903 val = pci_reg_read16 (ui->io, reg);
904 if (val & USB_PORT_CHANGE)
906 pci_reg_write16 (ui->io, reg, val & ~(USB_PORT_CHANGE));
914 uhci_create_chan (host_info hi, int dev_addr, int ver)
916 struct uhci_info *ui;
917 struct uhci_dev_info *ud;
920 ASSERT (dev_addr <= 127 && dev_addr >= 0);
924 ud = malloc (sizeof (struct uhci_dev_info));
925 ud->dev_addr = dev_addr;
926 ud->low_speed = (ver == USB_VERSION_1_0) ? true : false;
930 lock_init (&ud->lock);
934 ud->qh = qh_alloc (ud->ui);
937 memset (ud->qh, 0, sizeof (*ud->qh));
938 ud->qh->qelp.terminate = 1;
940 ud->qh->qelp.flp = 0;
941 ud->qh->qelp.qh_select = 0;
942 ud->qh->qhlp.qh_select = 1;
946 /* add to queues in frame list */
947 ud->qh->qhlp.flp = ui->frame_list[0].flp;
948 ud->qh->qhlp.terminate = ui->frame_list[0].terminate;
949 for (i = 0; i < FRAME_LIST_ENTRIES; i++)
951 ui->frame_list[i].flp = ptr_to_flp (vtop (ud->qh));
952 ui->frame_list[i].qh_select = 1;
953 ui->frame_list[i].terminate = 0;
956 /* add to device list */
957 list_push_back (&ui->devices, &ud->peers);
966 uhci_destroy_chan (host_dev_info hd)
968 struct uhci_dev_info *ud;
969 struct list_elem *li;
976 uhci_remove_qh (ud->ui, ud->qh);
978 /* wake up all waiting */
979 li = list_begin (&ud->ui->waiting);
980 while (li != list_end (&ud->ui->waiting))
983 w = list_entry (li, struct usb_wait, peers);
992 list_remove (&ud->peers);
996 qh_free (ud->ui, ud->qh);
998 uhci_unlock (ud->ui);
1004 * Remove a queue from the UHCI schedule
1007 uhci_remove_qh (struct uhci_info *ui, struct queue_head *qh)
1011 ASSERT (lock_held_by_current_thread (&ui->lock));
1012 ASSERT (uhci_is_stopped (ui));
1013 ASSERT (qh != NULL);
1015 qh_flp = ptr_to_flp (vtop (qh));
1016 /* remove from host queue */
1017 if (ui->frame_list[0].flp == qh_flp)
1021 for (i = 0; i < FRAME_LIST_ENTRIES; i++)
1023 ui->frame_list[i] = qh->qhlp;
1029 struct frame_list_ptr *fp;
1030 struct frame_list_ptr *prev;
1032 fp = ptov (flp_to_ptr (ui->frame_list[0].flp));
1033 ASSERT (!fp->terminate);
1037 fp = ptov (flp_to_ptr (fp->flp));
1039 while (!fp->terminate && fp->flp != qh_flp);
1045 * Put UHCI into stop state
1046 * Wait until status register reflects setting
1049 uhci_stop (struct uhci_info *ui)
1051 ASSERT (intr_get_level () != INTR_OFF);
1052 ASSERT (lock_held_by_current_thread (&ui->lock));
1054 uhci_stop_unlocked (ui);
1058 uhci_stop_unlocked (struct uhci_info *ui)
1063 cmd = pci_reg_read16 (ui->io, UHCI_REG_USBCMD);
1064 cmd = cmd & ~USB_CMD_RS;
1066 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, cmd);
1068 /* wait for execution schedule to finish up */
1069 for (i = 0; i < 1000; i++)
1071 if (uhci_is_stopped (ui))
1075 PANIC ("UHCI: Controller did not halt\n");
1080 uhci_run_unlocked (struct uhci_info *ui)
1083 cmd = pci_reg_read16 (ui->io, UHCI_REG_USBCMD);
1084 cmd = cmd | USB_CMD_RS | USB_CMD_MAX_PACKET;
1085 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, cmd);
1089 * Put UHCI into 'Run' State
1092 uhci_run (struct uhci_info *ui)
1094 ASSERT (lock_held_by_current_thread (&ui->lock));
1095 uhci_run_unlocked (ui);
1098 static struct tx_descriptor *
1099 uhci_acquire_td (struct uhci_info *ui)
1102 struct tx_descriptor *td;
1104 ASSERT (lock_held_by_current_thread (&ui->lock));
1105 ASSERT (!uhci_is_stopped (ui));
1107 sema_down (&ui->td_sem);
1108 td_idx = bitmap_scan_and_flip (ui->td_used, 0, 1, false);
1109 ASSERT (td_idx != BITMAP_ERROR);
1110 td = td_from_pool (ui, td_idx);
1116 uhci_modify_chan (host_dev_info hd, int dev_addr, int ver)
1118 struct uhci_dev_info *ud;
1121 ud->dev_addr = dev_addr;
1122 ud->low_speed = (ver == USB_VERSION_1_0) ? true : false;
1126 uhci_set_toggle (host_eop_info he, int toggle)
1128 struct uhci_eop_info *ue;
1131 ue->toggle = toggle;
1135 dump_all_qh (struct uhci_info *ui)
1137 struct list_elem *li;
1139 printf ("schedule: %x...", vtop (ui->frame_list));
1140 printf ("%x", *((uint32_t *) ui->frame_list));
1141 li = list_begin (&ui->devices);
1142 while (li != list_end (&ui->devices))
1144 struct uhci_dev_info *ud;
1145 ud = list_entry (li, struct uhci_dev_info, peers);
1147 li = list_next (li);
1152 dump_qh (struct queue_head *qh)
1154 struct frame_list_ptr *fp;
1155 printf ("qh: %p %x\n", qh, vtop (qh));
1157 while (!fp->terminate)
1159 printf ("%x %x\n", *((uint32_t *) fp), *(uint32_t *) (fp + 1));
1160 fp = ptov (flp_to_ptr (fp->flp));
1162 printf ("%x %x\n\n", *(uint32_t *) fp, *(uint32_t *) (fp + 1));
1165 static struct tx_descriptor *
1166 td_from_pool (struct uhci_info *ui, int idx)
1168 ASSERT (idx >= 0 && idx < TD_ENTRIES);
1169 return (((void *) ui->td_pool) + idx * 32);
1173 uhci_detect_ports (struct uhci_info *ui)
1177 for (i = 0; i < UHCI_MAX_PORTS; i++)
1180 status = pci_reg_read16 (ui->io, UHCI_REG_PORTSC1 + i * 2);
1181 if (!(status & 0x0080) || status == 0xffff)
1188 uhci_stall_watchdog (struct uhci_info *ui)
1193 timer_msleep (1000);
1194 printf ("watchdog\n");
1197 rmved = uhci_remove_stalled (ui);
1199 printf ("removed stalled packet in watchdog\n");
1206 uhci_remove_stalled (struct uhci_info *ui)
1208 struct list_elem *li;
1212 li = list_begin (&ui->waiting);
1216 while (li != list_end (&ui->waiting))
1218 struct usb_wait *uw;
1219 struct list_elem *next;
1222 next = list_next (li);
1223 uw = list_entry (li, struct usb_wait, peers);
1225 if ((!uw->td->control.active && uw->td->control.stalled) ||
1226 (uw->td->control.nak))
1228 memcpy (&ctrl, &uw->td->control, 4);
1229 printf ("CTRL: %x\n", ctrl);
1231 uhci_remove_error_td (uw->td);
1244 uhci_release_td (struct uhci_info *ui, struct tx_descriptor *td)
1246 int ofs = (uintptr_t) td - (uintptr_t) ui->td_pool;
1247 int entry = ofs / 32;
1249 ASSERT (entry < TD_ENTRIES);
1252 bitmap_reset (ui->td_used, entry);
1253 sema_up (&ui->td_sem);
1256 static host_eop_info
1257 uhci_create_eop (host_dev_info hd, int eop, int maxpkt)
1259 struct uhci_dev_info *ud;
1260 struct uhci_eop_info *e;
1264 e = malloc (sizeof (struct uhci_eop_info));
1274 uhci_remove_eop (host_eop_info hei)
1279 static struct queue_head *
1280 qh_alloc (struct uhci_info *ui)
1283 struct queue_head *qh;
1285 ASSERT (lock_held_by_current_thread (&ui->lock));
1287 qh_idx = bitmap_scan_and_flip (ui->qh_used, 0, 1, false);
1288 if (qh_idx == BITMAP_ERROR)
1290 PANIC ("UHCI: Too many queue heads in use-- runaway USB stack?\n");
1292 qh = (void *) (((intptr_t) ui->qh_pool) + qh_idx * 16);
1298 qh_free (struct uhci_info *ui, struct queue_head *qh)
1301 ASSERT (lock_held_by_current_thread (&ui->lock));
1303 entry = ((intptr_t) qh - (intptr_t) ui->qh_pool) / 16;
1304 bitmap_reset (ui->qh_used, entry);