coreboot-kgpe-d16/payloads/libpayload/drivers/usb/ohci.c

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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2010 Patrick Georgi
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
//#define USB_DEBUG
#include <arch/virtual.h>
#include <usb/usb.h>
#include "ohci_private.h"
#include "ohci.h"
static void ohci_start (hci_t *controller);
static void ohci_stop (hci_t *controller);
static void ohci_reset (hci_t *controller);
static void ohci_shutdown (hci_t *controller);
static int ohci_bulk (endpoint_t *ep, int size, u8 *data, int finalize);
static int ohci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq,
int dalen, u8 *data);
static void* ohci_create_intr_queue (endpoint_t *ep, int reqsize, int reqcount, int reqtiming);
static void ohci_destroy_intr_queue (endpoint_t *ep, void *queue);
static u8* ohci_poll_intr_queue (void *queue);
static void
ohci_reset (hci_t *controller)
{
}
#ifdef USB_DEBUG
/* Section 4.3.3 */
static const char *completion_codes[] = {
"No error",
"CRC",
"Bit stuffing",
"Data toggle mismatch",
"Stall",
"Device not responding",
"PID check failure",
"Unexpected PID",
"Data overrun",
"Data underrun",
"--- (10)",
"--- (11)",
"Buffer overrun",
"Buffer underrun",
"Not accessed (14)",
"Not accessed (15)"
};
/* Section 4.3.1.2 */
static const char *direction[] = {
"SETUP",
"OUT",
"IN",
"reserved / from TD"
};
#endif
hci_t *
ohci_init (pcidev_t addr)
{
int i;
hci_t *controller = new_controller ();
if (!controller)
fatal("Could not create USB controller instance.\n");
controller->instance = malloc (sizeof (ohci_t));
if(!controller->instance)
fatal("Not enough memory creating USB controller instance.\n");
controller->start = ohci_start;
controller->stop = ohci_stop;
controller->reset = ohci_reset;
controller->shutdown = ohci_shutdown;
controller->bulk = ohci_bulk;
controller->control = ohci_control;
controller->create_intr_queue = ohci_create_intr_queue;
controller->destroy_intr_queue = ohci_destroy_intr_queue;
controller->poll_intr_queue = ohci_poll_intr_queue;
for (i = 0; i < 128; i++) {
controller->devices[i] = 0;
}
init_device_entry (controller, 0);
OHCI_INST (controller)->roothub = controller->devices[0];
controller->bus_address = addr;
controller->reg_base = pci_read_config32 (controller->bus_address, 0x10); // OHCI mandates MMIO, so bit 0 is clear
OHCI_INST (controller)->opreg = (opreg_t*)phys_to_virt(controller->reg_base);
printf("OHCI Version %x.%x\n", (OHCI_INST (controller)->opreg->HcRevision >> 4) & 0xf, OHCI_INST (controller)->opreg->HcRevision & 0xf);
if ((OHCI_INST (controller)->opreg->HcControl & HostControllerFunctionalStateMask) == USBReset) {
/* cold boot */
OHCI_INST (controller)->opreg->HcControl &= ~RemoteWakeupConnected;
OHCI_INST (controller)->opreg->HcFmInterval = (11999 * FrameInterval) | ((((11999 - 210)*6)/7) * FSLargestDataPacket);
/* TODO: right value for PowerOnToPowerGoodTime ? */
OHCI_INST (controller)->opreg->HcRhDescriptorA = NoPowerSwitching | NoOverCurrentProtection | (10 * PowerOnToPowerGoodTime);
OHCI_INST (controller)->opreg->HcRhDescriptorB = (0 * DeviceRemovable);
udelay(100); /* TODO: reset asserting according to USB spec */
} else if ((OHCI_INST (controller)->opreg->HcControl & HostControllerFunctionalStateMask) != USBOperational) {
OHCI_INST (controller)->opreg->HcControl = (OHCI_INST (controller)->opreg->HcControl & ~HostControllerFunctionalStateMask) | USBResume;
udelay(100); /* TODO: resume time according to USB spec */
}
int interval = OHCI_INST (controller)->opreg->HcFmInterval;
td_t *periodic_td = memalign(sizeof(*periodic_td), sizeof(*periodic_td));
memset((void*)periodic_td, 0, sizeof(*periodic_td));
for (i=0; i<32; i++) OHCI_INST (controller)->hcca->HccaInterruptTable[i] = virt_to_phys(periodic_td);
/* TODO: build HCCA data structures */
OHCI_INST (controller)->opreg->HcCommandStatus = HostControllerReset;
udelay (10); /* at most 10us for reset to complete. State must be set to Operational within 2ms (5.1.1.4) */
OHCI_INST (controller)->opreg->HcFmInterval = interval;
OHCI_INST (controller)->hcca = memalign(256, 256);
memset((void*)OHCI_INST (controller)->hcca, 0, 256);
OHCI_INST (controller)->opreg->HcHCCA = virt_to_phys(OHCI_INST (controller)->hcca);
OHCI_INST (controller)->opreg->HcControl &= ~IsochronousEnable; // unused by this driver
// disable everything, contrary to what OHCI spec says in 5.1.1.4, as we don't need IRQs
OHCI_INST (controller)->opreg->HcInterruptEnable = 1<<31;
OHCI_INST (controller)->opreg->HcInterruptDisable = ~(1<<31);
OHCI_INST (controller)->opreg->HcInterruptStatus = ~0;
OHCI_INST (controller)->opreg->HcPeriodicStart = (((OHCI_INST (controller)->opreg->HcFmInterval & FrameIntervalMask) / 10) * 9);
OHCI_INST (controller)->opreg->HcControl = (OHCI_INST (controller)->opreg->HcControl & ~HostControllerFunctionalStateMask) | USBOperational;
mdelay(100);
controller->devices[0]->controller = controller;
controller->devices[0]->init = ohci_rh_init;
controller->devices[0]->init (controller->devices[0]);
ohci_reset (controller);
return controller;
}
static void
ohci_shutdown (hci_t *controller)
{
if (controller == 0)
return;
detach_controller (controller);
ohci_stop(controller);
OHCI_INST (controller)->roothub->destroy (OHCI_INST (controller)->
roothub);
free (OHCI_INST (controller));
free (controller);
}
static void
ohci_start (hci_t *controller)
{
// TODO: turn on all operation of OHCI, but assume that it's initialized.
}
static void
ohci_stop (hci_t *controller)
{
// TODO: turn off all operation of OHCI
}
static void
dump_td(td_t *cur, int level)
{
#ifdef USB_DEBUG
static const char *spaces=" ";
const char *spc=spaces+(10-level);
debug("%std at %x (%s), condition code: %s\n", spc, cur, direction[(cur->config & TD_DIRECTION_MASK) >> TD_DIRECTION_SHIFT],
completion_codes[(cur->config & TD_CC_MASK) >> TD_CC_SHIFT]);
debug("%s toggle: %x\n", spc, !!(cur->config & TD_TOGGLE_DATA1));
#endif
}
static int
wait_for_ed(usbdev_t *dev, ed_t *head)
{
td_t *cur;
/* wait for results */
while (((head->head_pointer & ~3) != head->tail_pointer) &&
!(head->head_pointer & 1) &&
((((td_t*)phys_to_virt(head->head_pointer & ~3))->config & TD_CC_MASK) >= TD_CC_NOACCESS)) {
debug("intst: %x; ctrl: %x; cmdst: %x; head: %x -> %x, tail: %x, condition: %x\n",
OHCI_INST(dev->controller)->opreg->HcInterruptStatus,
OHCI_INST(dev->controller)->opreg->HcControl,
OHCI_INST(dev->controller)->opreg->HcCommandStatus,
head->head_pointer,
((td_t*)phys_to_virt(head->head_pointer & ~3))->next_td,
head->tail_pointer,
(((td_t*)phys_to_virt(head->head_pointer & ~3))->config & TD_CC_MASK) >> TD_CC_SHIFT);
mdelay(1);
}
mdelay(5);
if (OHCI_INST(dev->controller)->opreg->HcInterruptStatus & WritebackDoneHead) {
debug("done queue:\n");
debug("%x, %x\n", OHCI_INST(dev->controller)->hcca->HccaDoneHead, phys_to_virt(OHCI_INST(dev->controller)->hcca->HccaDoneHead));
if ((OHCI_INST(dev->controller)->hcca->HccaDoneHead & ~1) == 0) {
debug("HcInterruptStatus %x\n", OHCI_INST(dev->controller)->opreg->HcInterruptStatus);
}
td_t *done_queue = NULL;
td_t *done_head = (td_t*)phys_to_virt(OHCI_INST(dev->controller)->hcca->HccaDoneHead);
while (1) {
td_t *oldnext = (td_t*)phys_to_virt(done_head->next_td);
if (oldnext == done_queue) break; /* last element refers to second to last, ie. endless loop */
if (oldnext == phys_to_virt(0)) break; /* last element of done list == first element of real list */
debug("head is %x, pointing to %x. requeueing to %x\n", done_head, oldnext, done_queue);
done_head->next_td = (u32)done_queue;
done_queue = done_head;
done_head = oldnext;
}
for (cur = done_queue; cur != 0; cur = (td_t*)cur->next_td) {
dump_td(cur, 1);
}
OHCI_INST(dev->controller)->opreg->HcInterruptStatus &= ~WritebackDoneHead;
}
if (head->head_pointer & 1) {
debug("HALTED!\n");
return 1;
}
return 0;
}
static int
ohci_control (usbdev_t *dev, direction_t dir, int drlen, void *devreq, int dalen,
unsigned char *data)
{
int i;
td_t *cur;
// pages are specified as 4K in OHCI, so don't use getpagesize()
int first_page = (unsigned long)data / 4096;
int last_page = (unsigned long)(data+dalen-1)/4096;
if (last_page < first_page) last_page = first_page;
int pages = (dalen==0)?0:(last_page - first_page + 1);
int td_count = (pages+1)/2;
td_t *tds = memalign(sizeof(td_t), (td_count+3)*sizeof(td_t));
memset((void*)tds, 0, (td_count+3)*sizeof(td_t));
for (i=0; i < td_count + 3; i++) {
tds[i].next_td = virt_to_phys(&tds[i+1]);
}
tds[td_count + 3].next_td = 0;
tds[0].config = TD_DIRECTION_SETUP |
TD_DELAY_INTERRUPT_NODELAY |
TD_TOGGLE_FROM_TD |
TD_TOGGLE_DATA0 |
TD_CC_NOACCESS;
tds[0].current_buffer_pointer = virt_to_phys(devreq);
tds[0].buffer_end = virt_to_phys(devreq + drlen - 1);
cur = &tds[0];
while (pages > 0) {
cur++;
cur->config = (dir==IN)?TD_DIRECTION_IN:TD_DIRECTION_OUT |
TD_DELAY_INTERRUPT_NODELAY |
TD_TOGGLE_FROM_ED |
TD_CC_NOACCESS;
cur->current_buffer_pointer = virt_to_phys(data);
pages--;
int consumed = (4096 - ((unsigned long)data % 4096));
if (consumed >= dalen) {
// end of data is within same page
cur->buffer_end = virt_to_phys(data + dalen - 1);
dalen = 0;
/* assert(pages == 0); */
} else {
dalen -= consumed;
data += consumed;
pages--;
int second_page_size = dalen;
if (dalen > 4096) {
second_page_size = 4096;
}
cur->buffer_end = virt_to_phys(data + second_page_size - 1);
dalen -= second_page_size;
data += second_page_size;
}
}
cur++;
cur->config = (dir==IN)?TD_DIRECTION_OUT:TD_DIRECTION_IN |
TD_DELAY_INTERRUPT_NODELAY |
TD_TOGGLE_FROM_TD |
TD_TOGGLE_DATA1 |
TD_CC_NOACCESS;
cur->current_buffer_pointer = 0;
cur->buffer_end = 0;
/* final dummy TD */
cur++;
/* Data structures */
ed_t *head = memalign(sizeof(ed_t), sizeof(ed_t));
memset((void*)head, 0, sizeof(*head));
head->config = (dev->address << ED_FUNC_SHIFT) |
(0 << ED_EP_SHIFT) |
(OHCI_FROM_TD << ED_DIR_SHIFT) |
(dev->speed?ED_LOWSPEED:0) |
(dev->endpoints[0].maxpacketsize << ED_MPS_SHIFT);
head->tail_pointer = virt_to_phys(cur);
head->head_pointer = virt_to_phys(tds);
debug("doing control transfer with %x. first_td at %x\n", head->config & ED_FUNC_MASK, virt_to_phys(tds));
/* activate schedule */
OHCI_INST(dev->controller)->opreg->HcControlHeadED = virt_to_phys(head);
OHCI_INST(dev->controller)->opreg->HcControl |= ControlListEnable;
OHCI_INST(dev->controller)->opreg->HcCommandStatus = ControlListFilled;
int failure = wait_for_ed(dev, head);
OHCI_INST(dev->controller)->opreg->HcControl &= ~ControlListEnable;
/* free memory */
free((void*)tds);
free((void*)head);
return failure;
}
/* finalize == 1: if data is of packet aligned size, add a zero length packet */
static int
ohci_bulk (endpoint_t *ep, int dalen, u8 *data, int finalize)
{
int i;
debug("bulk: %x bytes from %x, finalize: %x, maxpacketsize: %x\n", dalen, data, finalize, ep->maxpacketsize);
td_t *cur;
// pages are specified as 4K in OHCI, so don't use getpagesize()
int first_page = (unsigned long)data / 4096;
int last_page = (unsigned long)(data+dalen-1)/4096;
if (last_page < first_page) last_page = first_page;
int pages = (dalen==0)?0:(last_page - first_page + 1);
int td_count = (pages+1)/2;
if (finalize && ((dalen % ep->maxpacketsize) == 0)) {
td_count++;
}
td_t *tds = memalign(sizeof(td_t), (td_count+1)*sizeof(td_t));
memset((void*)tds, 0, (td_count+1)*sizeof(td_t));
for (i=0; i < td_count; i++) {
tds[i].next_td = virt_to_phys(&tds[i+1]);
}
for (cur = tds; cur->next_td != 0; cur++) {
cur->config = (ep->direction==IN)?TD_DIRECTION_IN:TD_DIRECTION_OUT |
TD_DELAY_INTERRUPT_NODELAY |
TD_TOGGLE_FROM_ED |
TD_CC_NOACCESS;
cur->current_buffer_pointer = virt_to_phys(data);
pages--;
if (dalen == 0) {
/* magic TD for empty packet transfer */
cur->current_buffer_pointer = 0;
cur->buffer_end = 0;
/* assert((pages == 0) && finalize); */
}
int consumed = (4096 - ((unsigned long)data % 4096));
if (consumed >= dalen) {
// end of data is within same page
cur->buffer_end = virt_to_phys(data + dalen - 1);
dalen = 0;
/* assert(pages == finalize); */
} else {
dalen -= consumed;
data += consumed;
pages--;
int second_page_size = dalen;
if (dalen > 4096) {
second_page_size = 4096;
}
cur->buffer_end = virt_to_phys(data + second_page_size - 1);
dalen -= second_page_size;
data += second_page_size;
}
}
/* Data structures */
ed_t *head = memalign(sizeof(ed_t), sizeof(ed_t));
memset((void*)head, 0, sizeof(*head));
head->config = (ep->dev->address << ED_FUNC_SHIFT) |
((ep->endpoint & 0xf) << ED_EP_SHIFT) |
(((ep->direction==IN)?OHCI_IN:OHCI_OUT) << ED_DIR_SHIFT) |
(ep->dev->speed?ED_LOWSPEED:0) |
(ep->maxpacketsize << ED_MPS_SHIFT);
head->tail_pointer = virt_to_phys(cur);
head->head_pointer = virt_to_phys(tds) | (ep->toggle?ED_TOGGLE:0);
debug("doing bulk transfer with %x(%x). first_td at %x, last %x\n", head->config & ED_FUNC_MASK,
(head->config & ED_EP_MASK) >> ED_EP_SHIFT, virt_to_phys(tds), virt_to_phys(cur));
/* activate schedule */
OHCI_INST(ep->dev->controller)->opreg->HcBulkHeadED = virt_to_phys(head);
OHCI_INST(ep->dev->controller)->opreg->HcControl |= BulkListEnable;
OHCI_INST(ep->dev->controller)->opreg->HcCommandStatus = BulkListFilled;
int failure = wait_for_ed(ep->dev, head);
OHCI_INST(ep->dev->controller)->opreg->HcControl &= ~BulkListEnable;
ep->toggle = head->head_pointer & ED_TOGGLE;
/* free memory */
free((void*)tds);
free((void*)head);
if (failure) {
/* try cleanup */
clear_stall(ep);
}
return failure;
}
/* create and hook-up an intr queue into device schedule */
static void*
ohci_create_intr_queue (endpoint_t *ep, int reqsize, int reqcount, int reqtiming)
{
return NULL;
}
/* remove queue from device schedule, dropping all data that came in */
static void
ohci_destroy_intr_queue (endpoint_t *ep, void *q_)
{
}
/* read one intr-packet from queue, if available. extend the queue for new input.
return NULL if nothing new available.
Recommended use: while (data=poll_intr_queue(q)) process(data);
*/
static u8*
ohci_poll_intr_queue (void *q_)
{
return NULL;
}