/** Initialize UHCI hc memory structures.
*
* @param[in] instance UHCI structure to use.
* @return Error code
* @note Should be called only once on any structure.
*
* Structures:
* - transfer lists (queue heads need to be accessible by the hw)
* - frame list page (needs to be one UHCI hw accessible 4K page)
*/
int hc_init_mem_structures(hc_t *instance)
{
assert(instance);
/* Init USB frame list page */
instance->frame_list = get_page();
if (!instance->frame_list) {
return ENOMEM;
}
usb_log_debug("Initialized frame list at %p.\n", instance->frame_list);
/* Init transfer lists */
int ret = hc_init_transfer_lists(instance);
if (ret != EOK) {
usb_log_error("Failed to initialize transfer lists.\n");
return_page(instance->frame_list);
return ENOMEM;
}
usb_log_debug("Initialized transfer lists.\n");
/* Set all frames to point to the first queue head */
const uint32_t queue = LINK_POINTER_QH(
addr_to_phys(instance->transfers_interrupt.queue_head));
for (unsigned i = 0; i < UHCI_FRAME_LIST_COUNT; ++i) {
instance->frame_list[i] = queue;
}
return EOK;
}
/**
* Initialize EHCI TD.
* @param instance TD structure to initialize.
* @param next Next TD in ED list.
* @param direction Used to determine PID, BOTH means setup PID.
* @param buffer Pointer to the first byte of transferred data.
* @param size Size of the buffer.
* @param toggle Toggle bit value, use 0/1 to set explicitly,
* any other value means that ED toggle will be used.
*/
void td_init(td_t *instance, const td_t *next,
usb_direction_t direction, const void *buffer, size_t size, int toggle,
bool ioc)
{
assert(instance);
memset(instance, 0, sizeof(td_t));
/* Set PID and Total size */
assert((size & TD_STATUS_TOTAL_MASK) == size);
EHCI_MEM32_WR(instance->status,
((dir[direction] & TD_STATUS_PID_MASK) << TD_STATUS_PID_SHIFT) |
((size & TD_STATUS_TOTAL_MASK) << TD_STATUS_TOTAL_SHIFT) |
(ioc ? TD_STATUS_IOC_FLAG : 0) );
if (toggle == 0 || toggle == 1) {
EHCI_MEM32_SET(instance->status,
toggle ? TD_STATUS_TOGGLE_FLAG : 0);
}
if (buffer != NULL) {
assert(size != 0);
for (unsigned i = 0; (i < ARRAY_SIZE(instance->buffer_pointer))
&& size; ++i) {
const uintptr_t page =
(addr_to_phys(buffer) & TD_BUFFER_POINTER_MASK);
const size_t offset =
((uintptr_t)buffer & TD_BUFFER_POINTER_OFFSET_MASK);
assert(offset == 0 || i == 0);
size -= min((4096 - offset), size);
buffer += min((4096 - offset), size);
EHCI_MEM32_WR(instance->buffer_pointer[i],
page | offset);
}
}
EHCI_MEM32_WR(instance->next, next ?
LINK_POINTER_TD(addr_to_phys(next)) : LINK_POINTER_TERM);
EHCI_MEM32_WR(instance->alternate, LINK_POINTER_TERM);
EHCI_MEM32_SET(instance->status, TD_STATUS_ACTIVE_FLAG);
write_barrier();
}
/** Initialize transfer list structures.
*
* @param[in] instance Memory place to use.
* @param[in] name Name of the new list.
* @return Error code
*
* Allocates memory for internal ed_t structure.
*/
int endpoint_list_init(endpoint_list_t *instance, const char *name)
{
assert(instance);
instance->name = name;
instance->list_head = malloc32(sizeof(ed_t));
if (!instance->list_head) {
usb_log_error("Failed to allocate list head.\n");
return ENOMEM;
}
instance->list_head_pa = addr_to_phys(instance->list_head);
usb_log_debug2("Transfer list %s setup with ED: %p(0x%0" PRIx32 ")).\n",
name, instance->list_head, instance->list_head_pa);
ed_init(instance->list_head, NULL, NULL);
list_initialize(&instance->endpoint_list);
fibril_mutex_initialize(&instance->guard);
return EOK;
}
/**
* Initialize ED.
*
* @param instance ED structure to initialize.
* @param ep Driver endpoint to use.
* @param td TD to put in the list.
*
* If @param ep is NULL, dummy ED is initialized with only skip flag set.
*/
void ed_init(ed_t *instance, const endpoint_t *ep, const td_t *td)
{
assert(instance);
memset(instance, 0, sizeof(*instance));
if (ep == NULL) {
/* Mark as dead, used for dummy EDs at the beginning of
* endpoint lists. */
OHCI_MEM32_WR(instance->status, ED_STATUS_K_FLAG);
return;
}
/* Non-dummy ED must have corresponding EP and TD assigned */
assert(td);
assert(ep);
assert(ep->direction < ARRAY_SIZE(dir));
/* Status: address, endpoint nr, direction mask and max packet size. */
OHCI_MEM32_WR(instance->status,
((ep->address & ED_STATUS_FA_MASK) << ED_STATUS_FA_SHIFT)
| ((ep->endpoint & ED_STATUS_EN_MASK) << ED_STATUS_EN_SHIFT)
| ((dir[ep->direction] & ED_STATUS_D_MASK) << ED_STATUS_D_SHIFT)
| ((ep->max_packet_size & ED_STATUS_MPS_MASK)
<< ED_STATUS_MPS_SHIFT));
/* Low speed flag */
if (ep->speed == USB_SPEED_LOW)
OHCI_MEM32_SET(instance->status, ED_STATUS_S_FLAG);
/* Isochronous format flag */
// TODO: We need iTD instead of TD for iso transfers
if (ep->transfer_type == USB_TRANSFER_ISOCHRONOUS)
OHCI_MEM32_SET(instance->status, ED_STATUS_F_FLAG);
/* Set TD to the list */
const uintptr_t pa = addr_to_phys(td);
OHCI_MEM32_WR(instance->td_head, pa & ED_TDHEAD_PTR_MASK);
OHCI_MEM32_WR(instance->td_tail, pa & ED_TDTAIL_PTR_MASK);
/* Set toggle bit */
if (ep->toggle)
OHCI_MEM32_SET(instance->td_head, ED_TDHEAD_TOGGLE_CARRY);
}
/** Remove endpoint from the list and queue.
*
* @param[in] instance List to use.
* @param[in] endpoint Endpoint to remove.
*/
void endpoint_list_remove_ep(endpoint_list_t *instance, ohci_endpoint_t *ep)
{
assert(instance);
assert(instance->list_head);
assert(ep);
assert(ep->ed);
fibril_mutex_lock(&instance->guard);
usb_log_debug2("Queue %s: removing endpoint(%p).\n", instance->name, ep);
const char *qpos = NULL;
ed_t *prev_ed;
/* Remove from the hardware queue */
if (list_first(&instance->endpoint_list) == &ep->link) {
/* I'm the first one here */
prev_ed = instance->list_head;
qpos = "FIRST";
} else {
ohci_endpoint_t *prev =
list_get_instance(ep->link.prev, ohci_endpoint_t, link);
prev_ed = prev->ed;
qpos = "NOT FIRST";
}
assert(ed_next(prev_ed) == addr_to_phys(ep->ed));
prev_ed->next = ep->ed->next;
/* Make sure ED is updated */
write_barrier();
usb_log_debug("HCD EP(%p) removed (%s) from %s, next %x.\n",
ep, qpos, instance->name, ep->ed->next);
/* Remove from the endpoint list */
list_remove(&ep->link);
fibril_mutex_unlock(&instance->guard);
}
/** Initialize UHCI hc hw resources.
*
* @param[in] instance UHCI structure to use.
* For magic values see UHCI Design Guide
*/
void hc_init_hw(const hc_t *instance)
{
assert(instance);
uhci_regs_t *registers = instance->registers;
/* Reset everything, who knows what touched it before us */
pio_write_16(®isters->usbcmd, UHCI_CMD_GLOBAL_RESET);
async_usleep(50000); /* 50ms according to USB spec(root hub reset) */
pio_write_16(®isters->usbcmd, 0);
/* Reset hc, all states and counters. Hope that hw is not broken */
pio_write_16(®isters->usbcmd, UHCI_CMD_HCRESET);
do { async_usleep(10); }
while ((pio_read_16(®isters->usbcmd) & UHCI_CMD_HCRESET) != 0);
/* Set frame to exactly 1ms */
pio_write_8(®isters->sofmod, 64);
/* Set frame list pointer */
const uint32_t pa = addr_to_phys(instance->frame_list);
pio_write_32(®isters->flbaseadd, pa);
if (instance->hw_interrupts) {
/* Enable all interrupts, but resume interrupt */
pio_write_16(&instance->registers->usbintr,
UHCI_INTR_ALLOW_INTERRUPTS);
}
const uint16_t cmd = pio_read_16(®isters->usbcmd);
if (cmd != 0)
usb_log_warning("Previous command value: %x.\n", cmd);
/* Start the hc with large(64B) packet FSBR */
pio_write_16(®isters->usbcmd,
UHCI_CMD_RUN_STOP | UHCI_CMD_MAX_PACKET | UHCI_CMD_CONFIGURE);
}
/** Debug function, checks consistency of memory structures.
*
* @param[in] arg UHCI structure to use.
* @return EOK (should never return)
*/
int hc_debug_checker(void *arg)
{
hc_t *instance = arg;
assert(instance);
#define QH(queue) \
instance->transfers_##queue.queue_head
while (1) {
const uint16_t cmd = pio_read_16(&instance->registers->usbcmd);
const uint16_t sts = pio_read_16(&instance->registers->usbsts);
const uint16_t intr =
pio_read_16(&instance->registers->usbintr);
if (((cmd & UHCI_CMD_RUN_STOP) != 1) || (sts != 0)) {
usb_log_debug2("Command: %X Status: %X Intr: %x\n",
cmd, sts, intr);
}
const uintptr_t frame_list =
pio_read_32(&instance->registers->flbaseadd) & ~0xfff;
if (frame_list != addr_to_phys(instance->frame_list)) {
usb_log_debug("Framelist address: %p vs. %p.\n",
(void *) frame_list,
(void *) addr_to_phys(instance->frame_list));
}
int frnum = pio_read_16(&instance->registers->frnum) & 0x3ff;
uintptr_t expected_pa = instance->frame_list[frnum]
& LINK_POINTER_ADDRESS_MASK;
uintptr_t real_pa = addr_to_phys(QH(interrupt));
if (expected_pa != real_pa) {
usb_log_debug("Interrupt QH: %p (frame %d) vs. %p.\n",
(void *) expected_pa, frnum, (void *) real_pa);
}
expected_pa = QH(interrupt)->next & LINK_POINTER_ADDRESS_MASK;
real_pa = addr_to_phys(QH(control_slow));
if (expected_pa != real_pa) {
usb_log_debug("Control Slow QH: %p vs. %p.\n",
(void *) expected_pa, (void *) real_pa);
}
expected_pa = QH(control_slow)->next & LINK_POINTER_ADDRESS_MASK;
real_pa = addr_to_phys(QH(control_full));
if (expected_pa != real_pa) {
usb_log_debug("Control Full QH: %p vs. %p.\n",
(void *) expected_pa, (void *) real_pa);
}
expected_pa = QH(control_full)->next & LINK_POINTER_ADDRESS_MASK;
real_pa = addr_to_phys(QH(bulk_full));
if (expected_pa != real_pa ) {
usb_log_debug("Bulk QH: %p vs. %p.\n",
(void *) expected_pa, (void *) real_pa);
}
async_usleep(UHCI_DEBUGER_TIMEOUT);
}
return EOK;
#undef QH
}