예제 #1
0
파일: xhci.c 프로젝트: redareda9/linux
/*
 * Start the HC after it was halted.
 *
 * This function is called by the USB core when the HC driver is added.
 * Its opposite is xhci_stop().
 *
 * xhci_init() must be called once before this function can be called.
 * Reset the HC, enable device slot contexts, program DCBAAP, and
 * set command ring pointer and event ring pointer.
 *
 * Setup MSI-X vectors and enable interrupts.
 */
int xhci_run(struct usb_hcd *hcd)
{
	u32 temp;
	u64 temp_64;
	int ret;
	struct xhci_hcd *xhci = hcd_to_xhci(hcd);

	/* Start the xHCI host controller running only after the USB 2.0 roothub
	 * is setup.
	 */

	hcd->uses_new_polling = 1;
	if (!usb_hcd_is_primary_hcd(hcd))
		return xhci_run_finished(xhci);

	xhci_dbg_trace(xhci, trace_xhci_dbg_init, "xhci_run");

	ret = xhci_try_enable_msi(hcd);
	if (ret)
		return ret;

	xhci_dbg(xhci, "Command ring memory map follows:\n");
	xhci_debug_ring(xhci, xhci->cmd_ring);
	xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring);
	xhci_dbg_cmd_ptrs(xhci);

	xhci_dbg(xhci, "ERST memory map follows:\n");
	xhci_dbg_erst(xhci, &xhci->erst);
	xhci_dbg(xhci, "Event ring:\n");
	xhci_debug_ring(xhci, xhci->event_ring);
	xhci_dbg_ring_ptrs(xhci, xhci->event_ring);
	temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
	temp_64 &= ~ERST_PTR_MASK;
	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
			"ERST deq = 64'h%0lx", (long unsigned int) temp_64);

	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
			"// Set the interrupt modulation register");
	temp = readl(&xhci->ir_set->irq_control);
	temp &= ~ER_IRQ_INTERVAL_MASK;
	temp |= (u32) 160;
	writel(temp, &xhci->ir_set->irq_control);

	/* Set the HCD state before we enable the irqs */
	temp = readl(&xhci->op_regs->command);
	temp |= (CMD_EIE);
	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
			"// Enable interrupts, cmd = 0x%x.", temp);
	writel(temp, &xhci->op_regs->command);

	temp = readl(&xhci->ir_set->irq_pending);
	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
			"// Enabling event ring interrupter %p by writing 0x%x to irq_pending",
			xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp));
	writel(ER_IRQ_ENABLE(temp), &xhci->ir_set->irq_pending);
	xhci_print_ir_set(xhci, 0);

	if (xhci->quirks & XHCI_NEC_HOST) {
		struct xhci_command *command;
		command = xhci_alloc_command(xhci, false, false, GFP_KERNEL);
		if (!command)
			return -ENOMEM;
		xhci_queue_vendor_command(xhci, command, 0, 0, 0,
				TRB_TYPE(TRB_NEC_GET_FW));
	}
	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
			"Finished xhci_run for USB2 roothub");
	return 0;
}
예제 #2
0
int xhci_run(struct usb_hcd *hcd)
{
	u32 temp;
	u64 temp_64;
	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
	void (*doorbell)(struct xhci_hcd *) = NULL;

	hcd->uses_new_polling = 1;
	hcd->poll_rh = 0;

	xhci_dbg(xhci, "xhci_run\n");
#if 0	
	
	ret = xhci_setup_msix(xhci);
	if (!ret)
		return ret;

	return -ENOSYS;
#endif
#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
	init_timer(&xhci->event_ring_timer);
	xhci->event_ring_timer.data = (unsigned long) xhci;
	xhci->event_ring_timer.function = xhci_event_ring_work;
	
	xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ;
	xhci->zombie = 0;
	xhci_dbg(xhci, "Setting event ring polling timer\n");
	add_timer(&xhci->event_ring_timer);
#endif

	xhci_dbg(xhci, "Command ring memory map follows:\n");
	xhci_debug_ring(xhci, xhci->cmd_ring);
	xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring);
	xhci_dbg_cmd_ptrs(xhci);

	xhci_dbg(xhci, "ERST memory map follows:\n");
	xhci_dbg_erst(xhci, &xhci->erst);
	xhci_dbg(xhci, "Event ring:\n");
	xhci_debug_ring(xhci, xhci->event_ring);
	xhci_dbg_ring_ptrs(xhci, xhci->event_ring);
	temp_64 = xhci_read_64(xhci, &xhci->ir_set->erst_dequeue);
	temp_64 &= ~ERST_PTR_MASK;
	xhci_dbg(xhci, "ERST deq = 64'h%0lx\n", (long unsigned int) temp_64);

	xhci_dbg(xhci, "// Set the interrupt modulation register\n");
	temp = xhci_readl(xhci, &xhci->ir_set->irq_control);
	temp &= ~ER_IRQ_INTERVAL_MASK;
	temp |= (u32) 160;
	xhci_writel(xhci, temp, &xhci->ir_set->irq_control);

	
	hcd->state = HC_STATE_RUNNING;
	temp = xhci_readl(xhci, &xhci->op_regs->command);
	temp |= (CMD_EIE);
	xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n",
			temp);
	xhci_writel(xhci, temp, &xhci->op_regs->command);

	temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
	xhci_dbg(xhci, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n",
			xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp));
	xhci_writel(xhci, ER_IRQ_ENABLE(temp),
			&xhci->ir_set->irq_pending);
	xhci_print_ir_set(xhci, xhci->ir_set, 0);

	if (NUM_TEST_NOOPS > 0)
		doorbell = xhci_setup_one_noop(xhci);

	temp = xhci_readl(xhci, &xhci->op_regs->command);
	temp |= (CMD_RUN);
	xhci_dbg(xhci, "// Turn on HC, cmd = 0x%x.\n",
			temp);
	xhci_writel(xhci, temp, &xhci->op_regs->command);
	
	temp = xhci_readl(xhci, &xhci->op_regs->command);
	xhci_dbg(xhci, "// @%p = 0x%x\n", &xhci->op_regs->command, temp);
	if (doorbell)
		(*doorbell)(xhci);

	xhci_dbg(xhci, "Finished xhci_run\n");
	return 0;
}