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);
235 static struct tx_descriptor *td_from_pool (struct uhci_info *ui, int idx);
237 static int check_and_flip_change (struct uhci_info *ui, int reg);
238 static void uhci_stop (struct uhci_info *ui);
239 static void uhci_run (struct uhci_info *ui);
240 static void uhci_stop_unlocked (struct uhci_info *ui);
241 static void uhci_run_unlocked (struct uhci_info *ui);
242 #define uhci_is_stopped(x) (pci_reg_read16((x)->io, UHCI_REG_USBSTS) \
244 #define uhci_port_enabled(x, y) (pci_reg_read16((x)->io, (y)) & USB_PORT_ENABLE)
245 static void uhci_add_td_to_qh (struct queue_head *qh,
246 struct tx_descriptor *td);
247 static void uhci_remove_error_td (struct tx_descriptor *td);
248 static void uhci_setup_td (struct tx_descriptor *td, int dev_addr, int token,
249 int eop, void *pkt, int sz, int toggle, bool ls);
250 static int uhci_enable_port (struct uhci_info *ui, int port);
251 static void uhci_irq (void *uhci_data);
252 static void uhci_detect_ports (struct uhci_info *ui);
254 static int uhci_remove_stalled (struct uhci_info *ui);
255 static void uhci_stall_watchdog (struct uhci_info *ui);
257 static void dump_all_qh (struct uhci_info *ui);
258 static void dump_qh (struct queue_head *qh);
260 static void dump_regs (struct uhci_info *ui);
262 void uhci_init (void);
265 static struct usb_host uhci_host = {
267 .tx_pkt = uhci_tx_pkt,
268 .detect_change = uhci_detect_change,
269 .create_dev_channel = uhci_create_chan,
270 .remove_dev_channel = uhci_destroy_chan,
271 .modify_dev_channel = uhci_modify_chan,
272 .create_eop = uhci_create_eop,
273 .remove_eop = uhci_remove_eop
283 while ((pd = pci_get_dev_by_class (PCI_MAJOR_SERIALBUS, PCI_MINOR_USB,
284 PCI_USB_IFACE_UHCI, dev_num)) != NULL)
287 struct uhci_info *ui;
295 while ((io = pci_io_enum (pd, io)) != NULL)
297 if (pci_io_size (io) == UHCI_REGSZ)
301 /* not found, next PCI */
305 ui = uhci_create_info (io);
308 sof = pci_reg_read8 (ui->io, UHCI_REG_SOFMOD);
309 uhci_detect_ports (ui);
312 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, USB_CMD_GRESET);
314 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, 0);
317 /* reset controller */
318 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, USB_CMD_HCRESET);
320 if (pci_reg_read16 (ui->io, UHCI_REG_USBCMD) & USB_CMD_HCRESET)
322 printf ("UHCI: Reset timed out\n");
323 uhci_destroy_info (ui);
326 pci_reg_write16 (ui->io, UHCI_REG_USBINTR, 0);
327 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, 0);
329 for (i = 0; i < ui->num_ports; i++)
330 pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + i * 2, 0);
333 printf ("UHCI: Enabling %d root ports\n", ui->num_ports);
334 ui->attached_ports = 0;
335 for (i = 0; i < ui->num_ports; i++)
336 ui->attached_ports += uhci_enable_port (ui, i);
338 pci_reg_write8 (ui->io, UHCI_REG_SOFMOD, sof);
339 pci_reg_write16 (ui->io, UHCI_REG_FRNUM, 0);
340 pci_reg_write32 (ui->io, UHCI_REG_FLBASEADD, vtop (ui->frame_list));
341 pci_reg_write16 (ui->io, UHCI_REG_USBINTR,
342 USB_INTR_SHORT | USB_INTR_IOC |
343 USB_INTR_TIMEOUT | USB_INTR_RESUME);
345 /* deactivate SMM junk, only enable IRQ */
346 pci_write_config16 (ui->dev, UHCI_REG_LEGSUP, 0x2000);
352 pci_register_irq (pd, uhci_irq, ui);
354 usb_register_host (&uhci_host, ui);
358 #define UHCI_PORT_TIMEOUT 1000
360 uhci_enable_port (struct uhci_info *ui, int port)
365 /* individual ports must be reset for QEMU to go into USB_STATE_DEFAULT */
366 pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + port * 2, USB_PORT_RESET);
369 /* ACK disconnect from reset so we can see if port is connected */
370 pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + port * 2,
371 USB_PORT_ENABLE | USB_PORT_CONNECTCHG);
373 status = pci_reg_read16 (ui->io, UHCI_REG_PORTSC1 + port * 2);
374 if (!(status & USB_PORT_CONNECTSTATUS))
379 /* ACK CONNECTCHG status so port can be enabled */
380 pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + port * 2,
381 USB_PORT_ENABLE | USB_PORT_CONNECTCHG);
382 for (count = 0; count < UHCI_PORT_TIMEOUT; count++)
384 if (uhci_port_enabled (ui, UHCI_REG_PORTSC1 + port * 2))
386 pci_reg_write16 (ui->io, UHCI_REG_PORTSC1 + port * 2,
387 USB_PORT_ENABLE | USB_PORT_CONNECTCHG);
392 printf ("UHCI: Port %d enable timed out\n", port);
400 dump_regs (struct uhci_info *ui)
402 int regs[] = { 0, 2, 4, 6, 8, 0xc, 0x10, 0x12 };
403 int sz[] = { 2, 2, 2, 2, 4, 2, 2, 2 };
405 { "cmd", "sts", "intr", "frnum", "base", "sofmod", "portsc1", "portsc2" };
407 printf ("UHCI registers:\n");
408 for (i = 0; i < 8; i++)
410 printf ("%s: %x\n", name[i], (sz[i] == 2) ?
411 pci_reg_read16 (ui->io, regs[i]) :
412 pci_reg_read32 (ui->io, regs[i]));
419 uhci_destroy_info (struct uhci_info *ui)
421 palloc_free_page (ui->frame_list);
422 palloc_free_page (ui->td_pool);
423 palloc_free_page (ui->qh_pool);
424 bitmap_destroy (ui->qh_used);
425 bitmap_destroy (ui->td_used);
429 static struct uhci_info *
430 uhci_create_info (struct pci_io *io)
432 struct uhci_info *ui;
435 ui = malloc (sizeof (struct uhci_info));
438 lock_init (&ui->lock);
440 /* create an empty schedule */
441 ui->frame_list = palloc_get_page (PAL_ASSERT | PAL_NOCACHE);
442 memset (ui->frame_list, 0, PGSIZE);
443 for (i = 0; i < FRAME_LIST_ENTRIES; i++)
444 ui->frame_list[i].terminate = 1;
446 /* permit 3 timeouts */
448 // thread_create ("uhci watchdog", PRI_MIN,
449 // (thread_func *) uhci_stall_watchdog, ui);
450 ui->td_pool = palloc_get_page (PAL_ASSERT | PAL_NOCACHE);
451 ui->td_used = bitmap_create (TD_ENTRIES);
452 ui->qh_pool = palloc_get_page (PAL_ASSERT | PAL_NOCACHE);
453 ui->qh_used = bitmap_create (QH_ENTRIES);
454 sema_init (&ui->td_sem, TD_ENTRIES);
456 list_init (&ui->devices);
457 list_init (&ui->waiting);
464 uhci_tx_pkt (host_eop_info hei, int token, void *pkt, int min_sz,
465 int max_sz, int *in_sz, bool wait)
467 struct uhci_eop_info *ue;
468 struct uhci_dev_info *ud;
470 ASSERT (min_sz <= max_sz);
472 /* can't have page overlap */
476 ASSERT (pg_no (pkt + max_sz - 1) == pg_no (pkt));
482 /* don't bother if ports are down */
483 if (ud->ui->attached_ports == 0)
485 return USB_HOST_ERR_NODEV;
488 /* setup token acts to synchronize data toggle */
489 if (token == USB_TOKEN_SETUP)
494 return uhci_tx_pkt_bulk (ue, token, pkt, max_sz, in_sz);
502 return uhci_tx_pkt_now (ue, token, pkt, max_sz);
506 return uhci_tx_pkt_wait (ue, token, pkt, max_sz, in_sz);
514 uhci_tx_pkt_bulk (struct uhci_eop_info *ue, int token, void *buf,
517 /* XXX this can be made to use async packets */
521 /* send data in max_pkt sized chunks */
530 to_tx = (left > ue->maxpkt) ? ue->maxpkt : left;
531 wait_on_pkt = (left <= to_tx) ? true : false;
534 err = uhci_tx_pkt (ue, token, buf + bytes, 0, to_tx, &pkt_txed,
549 return USB_HOST_ERR_NONE;
553 token_to_pid (int token)
557 case USB_TOKEN_SETUP:
558 return USB_PID_SETUP;
564 PANIC ("Unknown USB token\n");
569 uhci_setup_td (struct tx_descriptor *td, int dev_addr, int token,
570 int eop, void *pkt, int sz, int toggle, bool ls)
572 td->buf_ptr = (sz == 0) ? 0 : vtop (pkt);
574 td->token.pid = token_to_pid (token);
575 td->token.dev_addr = dev_addr;
576 td->token.end_point = eop;
577 td->token.data_toggle = toggle;
578 td->token.maxlen = sz - 1;
579 // td->control.ls = ls;
581 td->control.actual_len = 0;
582 td->control.active = 1;
583 td->flp.qh_select = 0;
584 td->flp.depth_select = 0;
586 /* kill packet if too many errors */
587 td->control.error_limit = 3;
591 uhci_tx_pkt_now (struct uhci_eop_info *ue, int token, void *pkt, int sz)
593 struct tx_descriptor *td;
594 struct uhci_dev_info *ud;
600 td = uhci_acquire_td (ud->ui);
601 memset (td, 0, sizeof (struct tx_descriptor));
602 uhci_setup_td (td, ud->dev_addr, token, ue->eop, pkt, sz, ue->toggle,
608 uhci_add_td_to_qh (ud->qh, td);
609 td->flags = TD_FL_ASYNC | TD_FL_USED;
612 uhci_unlock (ud->ui);
615 return USB_HOST_ERR_NONE;
619 uhci_tx_pkt_wait (struct uhci_eop_info *ue, int token, void *pkt,
620 int max_sz, int *in_sz)
622 enum intr_level old_lvl;
623 struct tx_descriptor *td;
626 struct uhci_dev_info *ud;
632 td = uhci_acquire_td (ud->ui);
633 memset (td, 0, sizeof (struct tx_descriptor));
635 uhci_setup_td (td, ud->dev_addr, token, ue->eop, pkt, max_sz, ue->toggle,
641 sema_init (&w.sem, 0);
645 /* put into device's queue and add to waiting packet list */
646 uhci_add_td_to_qh (ud->qh, td);
647 td->flags = TD_FL_USED;
649 list_push_back (&ud->ui->waiting, &w.peers);
651 /* reactivate controller and wait */
652 old_lvl = intr_disable ();
654 uhci_unlock (ud->ui);
656 intr_set_level (old_lvl);
660 if (w.td->control.actual_len == 0x7ff)
663 *in_sz = w.td->control.actual_len + 1;
666 if (w.td->control.bitstuff)
667 err = USB_HOST_ERR_BITSTUFF;
668 else if (w.td->control.timeout)
669 err = USB_HOST_ERR_TIMEOUT;
670 else if (w.td->control.nak)
671 err = USB_HOST_ERR_NAK;
672 else if (w.td->control.babble)
673 err = USB_HOST_ERR_BABBLE;
674 else if (w.td->control.buffer_error)
675 err = USB_HOST_ERR_BUFFER;
676 else if (w.td->control.stalled)
677 err = USB_HOST_ERR_STALL;
680 err = USB_HOST_ERR_NONE;
684 uhci_release_td (ud->ui, td);
690 uhci_add_td_to_qh (struct queue_head *qh, struct tx_descriptor *td)
692 struct frame_list_ptr *fp;
696 td->head = &qh->qelp;
697 if (qh->qelp.terminate == 1)
700 td->flp.terminate = 1;
703 qh->qelp.flp = ptr_to_flp (vtop (td));
704 qh->qelp.terminate = 0;
708 /* find the last element in the queue */
709 fp = ptov (flp_to_ptr (qh->qelp.flp));
710 ASSERT (qh->qelp.terminate == 0);
711 while (!fp->terminate)
713 fp = ptov (flp_to_ptr (fp->flp));
716 /* set TD to terminated ptr */
720 fp->depth_select = 0;
721 fp->flp = ptr_to_flp (vtop (td));
728 uhci_irq (void *uhci_data)
730 struct uhci_info *ui;
734 status = pci_reg_read16 (ui->io, UHCI_REG_USBSTS);
735 if (status & USB_STATUS_PROCESSERR)
739 PANIC ("UHCI: Malformed schedule");
741 else if (status & USB_STATUS_HOSTERR)
745 PANIC ("UHCI: Host system error");
747 else if (status & USB_STATUS_INTERR)
750 pci_reg_write16 (ui->io, UHCI_REG_USBSTS, USB_STATUS_INTERR);
753 if (status & USB_STATUS_USBINT)
755 /* turn off interrupt */
756 uhci_stop_unlocked (ui);
757 pci_reg_write16 (ui->io, UHCI_REG_USBSTS, USB_STATUS_USBINT);
758 uhci_process_completed (ui);
759 uhci_run_unlocked (ui);
764 uhci_process_completed (struct uhci_info *ui)
766 struct list_elem *li;
770 li = list_begin (&ui->waiting);
771 while (li != list_end (&ui->waiting))
774 struct list_elem *next;
776 next = list_next (li);
777 uw = list_entry (li, struct usb_wait, peers);
779 if (!uw->td->control.active)
782 if (uw->td->control.error_limit == 0 || uw->td->control.stalled)
784 uhci_remove_error_td (uw->td);
793 /* must be a completed async TD.. */
794 /* is this too time consuming? I hope not */
798 while (start < TD_ENTRIES)
800 struct tx_descriptor *td;
802 start = bitmap_scan (ui->td_used, start, 1, true);
803 if (start == BITMAP_ERROR)
806 td = td_from_pool (ui, start);
808 if (!td->control.active && (td->flags & TD_FL_ASYNC) &&
809 (td->flags & TD_FL_USED))
811 if (td->control.error_limit == 0 || td->control.stalled)
813 uhci_remove_error_td (td);
815 uhci_release_td (ui, td);
825 uhci_remove_error_td (struct tx_descriptor *td)
827 struct frame_list_ptr *fp;
830 ASSERT (td->head != NULL);
833 td_flp = ptr_to_flp (vtop (td));
834 while (fp->flp != td_flp)
836 ASSERT (fp->terminate == 0);
837 fp = ptov (flp_to_ptr (fp->flp));
843 uhci_detect_change (host_info hi)
845 struct uhci_info *ui;
852 for (i = 0; i < ui->num_ports; i++)
854 change = check_and_flip_change (ui, i);
864 check_and_flip_change (struct uhci_info *ui, int port)
869 reg = UHCI_REG_PORTSC1 + port * 2;
870 val = pci_reg_read16 (ui->io, reg);
871 if (val & USB_PORT_CHANGE)
873 pci_reg_write16 (ui->io, reg, val & ~(USB_PORT_CHANGE));
881 uhci_create_chan (host_info hi, int dev_addr, int ver)
883 struct uhci_info *ui;
884 struct uhci_dev_info *ud;
887 ASSERT (dev_addr <= 127 && dev_addr >= 0);
891 ud = malloc (sizeof (struct uhci_dev_info));
892 ud->dev_addr = dev_addr;
893 ud->low_speed = (ver == USB_VERSION_1_0) ? true : false;
897 lock_init (&ud->lock);
901 ud->qh = qh_alloc (ud->ui);
904 memset (ud->qh, 0, sizeof (*ud->qh));
905 ud->qh->qelp.terminate = 1;
907 ud->qh->qelp.flp = 0;
908 ud->qh->qelp.qh_select = 0;
909 ud->qh->qhlp.qh_select = 1;
913 /* add to queues in frame list */
914 ud->qh->qhlp.flp = ui->frame_list[0].flp;
915 ud->qh->qhlp.terminate = ui->frame_list[0].terminate;
916 for (i = 0; i < FRAME_LIST_ENTRIES; i++)
918 ui->frame_list[i].flp = ptr_to_flp (vtop (ud->qh));
919 ui->frame_list[i].qh_select = 1;
920 ui->frame_list[i].terminate = 0;
923 /* add to device list */
924 list_push_back (&ui->devices, &ud->peers);
933 uhci_destroy_chan (host_dev_info hd)
935 struct uhci_dev_info *ud;
936 struct list_elem *li;
943 uhci_remove_qh (ud->ui, ud->qh);
945 /* wake up all waiting */
946 li = list_begin (&ud->ui->waiting);
947 while (li != list_end (&ud->ui->waiting))
950 w = list_entry (li, struct usb_wait, peers);
959 list_remove (&ud->peers);
963 qh_free (ud->ui, ud->qh);
965 uhci_unlock (ud->ui);
971 * Remove a queue from the UHCI schedule
974 uhci_remove_qh (struct uhci_info *ui, struct queue_head *qh)
978 ASSERT (lock_held_by_current_thread (&ui->lock));
979 ASSERT (uhci_is_stopped (ui));
982 qh_flp = ptr_to_flp (vtop (qh));
983 /* remove from host queue */
984 if (ui->frame_list[0].flp == qh_flp)
988 for (i = 0; i < FRAME_LIST_ENTRIES; i++)
990 ui->frame_list[i] = qh->qhlp;
996 struct frame_list_ptr *fp;
997 struct frame_list_ptr *prev;
999 fp = ptov (flp_to_ptr (ui->frame_list[0].flp));
1000 ASSERT (!fp->terminate);
1004 fp = ptov (flp_to_ptr (fp->flp));
1006 while (!fp->terminate && fp->flp != qh_flp);
1012 * Put UHCI into stop state
1013 * Wait until status register reflects setting
1016 uhci_stop (struct uhci_info *ui)
1018 ASSERT (intr_get_level () != INTR_OFF);
1019 ASSERT (lock_held_by_current_thread (&ui->lock));
1021 uhci_stop_unlocked (ui);
1025 uhci_stop_unlocked (struct uhci_info *ui)
1030 cmd = pci_reg_read16 (ui->io, UHCI_REG_USBCMD);
1031 cmd = cmd & ~USB_CMD_RS;
1033 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, cmd);
1035 /* wait for execution schedule to finish up */
1036 for (i = 0; i < 1000; i++)
1038 if (uhci_is_stopped (ui))
1042 PANIC ("UHCI: Controller did not halt\n");
1047 uhci_run_unlocked (struct uhci_info *ui)
1050 cmd = pci_reg_read16 (ui->io, UHCI_REG_USBCMD);
1051 cmd = cmd | USB_CMD_RS | USB_CMD_MAX_PACKET;
1052 pci_reg_write16 (ui->io, UHCI_REG_USBCMD, cmd);
1056 * Put UHCI into 'Run' State
1059 uhci_run (struct uhci_info *ui)
1061 ASSERT (lock_held_by_current_thread (&ui->lock));
1062 uhci_run_unlocked (ui);
1065 static struct tx_descriptor *
1066 uhci_acquire_td (struct uhci_info *ui)
1069 struct tx_descriptor *td;
1071 ASSERT (lock_held_by_current_thread (&ui->lock));
1072 ASSERT (!uhci_is_stopped (ui));
1074 sema_down (&ui->td_sem);
1075 td_idx = bitmap_scan_and_flip (ui->td_used, 0, 1, false);
1076 ASSERT (td_idx != BITMAP_ERROR);
1077 td = td_from_pool (ui, td_idx);
1083 uhci_modify_chan (host_dev_info hd, int dev_addr, int ver)
1085 struct uhci_dev_info *ud;
1088 ud->dev_addr = dev_addr;
1089 ud->low_speed = (ver == USB_VERSION_1_0) ? true : false;
1093 dump_all_qh (struct uhci_info *ui)
1095 struct list_elem *li;
1097 printf ("schedule: %x...", vtop (ui->frame_list));
1098 printf ("%x", *((uint32_t *) ui->frame_list));
1099 li = list_begin (&ui->devices);
1100 while (li != list_end (&ui->devices))
1102 struct uhci_dev_info *ud;
1103 ud = list_entry (li, struct uhci_dev_info, peers);
1105 li = list_next (li);
1110 dump_qh (struct queue_head *qh)
1112 struct frame_list_ptr *fp;
1113 printf ("qh: %p %x\n", qh, vtop (qh));
1115 while (!fp->terminate)
1117 printf ("%x %x\n", *((uint32_t *) fp), *(uint32_t *) (fp + 1));
1118 fp = ptov (flp_to_ptr (fp->flp));
1120 printf ("%x %x\n\n", *(uint32_t *) fp, *(uint32_t *) (fp + 1));
1123 static struct tx_descriptor *
1124 td_from_pool (struct uhci_info *ui, int idx)
1126 ASSERT (idx >= 0 && idx < TD_ENTRIES);
1127 return (((void *) ui->td_pool) + idx * 32);
1131 uhci_detect_ports (struct uhci_info *ui)
1135 for (i = 0; i < UHCI_MAX_PORTS; i++)
1138 status = pci_reg_read16 (ui->io, UHCI_REG_PORTSC1 + i * 2);
1139 if (!(status & 0x0080) || status == 0xffff)
1146 uhci_stall_watchdog (struct uhci_info *ui)
1151 timer_msleep (1000);
1152 printf ("watchdog\n");
1155 rmved = uhci_remove_stalled (ui);
1157 printf ("removed stalled packet in watchdog\n");
1164 uhci_remove_stalled (struct uhci_info *ui)
1166 struct list_elem *li;
1170 li = list_begin (&ui->waiting);
1174 while (li != list_end (&ui->waiting))
1176 struct usb_wait *uw;
1177 struct list_elem *next;
1180 next = list_next (li);
1181 uw = list_entry (li, struct usb_wait, peers);
1183 if ((!uw->td->control.active && uw->td->control.stalled) ||
1184 (uw->td->control.nak))
1186 memcpy (&ctrl, &uw->td->control, 4);
1187 printf ("CTRL: %x\n", ctrl);
1189 uhci_remove_error_td (uw->td);
1202 uhci_release_td (struct uhci_info *ui, struct tx_descriptor *td)
1204 int ofs = (uintptr_t) td - (uintptr_t) ui->td_pool;
1205 int entry = ofs / 32;
1207 ASSERT (entry < TD_ENTRIES);
1210 bitmap_reset (ui->td_used, entry);
1211 sema_up (&ui->td_sem);
1214 static host_eop_info
1215 uhci_create_eop (host_dev_info hd, int eop, int maxpkt)
1217 struct uhci_dev_info *ud;
1218 struct uhci_eop_info *e;
1222 e = malloc (sizeof (struct uhci_eop_info));
1232 uhci_remove_eop (host_eop_info hei)
1237 static struct queue_head *
1238 qh_alloc (struct uhci_info *ui)
1241 struct queue_head *qh;
1243 ASSERT (lock_held_by_current_thread (&ui->lock));
1245 qh_idx = bitmap_scan_and_flip (ui->qh_used, 0, 1, false);
1246 if (qh_idx == BITMAP_ERROR)
1248 PANIC ("UHCI: Too many queue heads in use-- runaway USB stack?\n");
1250 qh = (void *) (((intptr_t) ui->qh_pool) + qh_idx * 16);
1256 qh_free (struct uhci_info *ui, struct queue_head *qh)
1259 ASSERT (lock_held_by_current_thread (&ui->lock));
1261 entry = ((intptr_t) qh - (intptr_t) ui->qh_pool) / 16;
1262 bitmap_reset (ui->qh_used, entry);