2 * EHCI-compliant USB host controller driver for NVIDIA Tegra SoCs
4 * Copyright (C) 2010 Google, Inc.
5 * Copyright (C) 2009 NVIDIA Corporation
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 #include <linux/clk.h>
20 #include <linux/platform_device.h>
21 #include <linux/platform_data/tegra_usb.h>
22 #include <linux/irq.h>
23 #include <linux/usb/otg.h>
24 #include <linux/gpio.h>
26 #include <linux/of_gpio.h>
28 #include <mach/usb_phy.h>
29 #include <mach/iomap.h>
31 #define TEGRA_USB_DMA_ALIGN 32
33 struct tegra_ehci_hcd {
34 struct ehci_hcd *ehci;
35 struct tegra_usb_phy *phy;
38 struct otg_transceiver *transceiver;
42 int power_down_on_bus_suspend;
43 enum tegra_usb_phy_port_speed port_speed;
46 static void tegra_ehci_power_up(struct usb_hcd *hcd)
48 struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
50 clk_enable(tegra->emc_clk);
51 clk_enable(tegra->clk);
52 tegra_usb_phy_power_on(tegra->phy);
53 tegra->host_resumed = 1;
56 static void tegra_ehci_power_down(struct usb_hcd *hcd)
58 struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
60 tegra->host_resumed = 0;
61 tegra_usb_phy_power_off(tegra->phy);
62 clk_disable(tegra->clk);
63 clk_disable(tegra->emc_clk);
66 static int tegra_ehci_internal_port_reset(
67 struct ehci_hcd *ehci,
68 u32 __iomem *portsc_reg
77 spin_lock_irqsave(&ehci->lock, flags);
78 saved_usbintr = ehci_readl(ehci, &ehci->regs->intr_enable);
79 /* disable USB interrupt */
80 ehci_writel(ehci, 0, &ehci->regs->intr_enable);
81 spin_unlock_irqrestore(&ehci->lock, flags);
84 * Here we have to do Port Reset at most twice for
85 * Port Enable bit to be set.
87 for (i = 0; i < 2; i++) {
88 temp = ehci_readl(ehci, portsc_reg);
90 ehci_writel(ehci, temp, portsc_reg);
93 ehci_writel(ehci, temp, portsc_reg);
99 * Up to this point, Port Enable bit is
100 * expected to be set after 2 ms waiting.
101 * USB1 usually takes extra 45 ms, for safety,
102 * we take 100 ms as timeout.
104 temp = ehci_readl(ehci, portsc_reg);
105 } while (!(temp & PORT_PE) && tries--);
113 * Clear Connect Status Change bit if it's set.
114 * We can't clear PORT_PEC. It will also cause PORT_PE to be cleared.
117 ehci_writel(ehci, PORT_CSC, portsc_reg);
120 * Write to clear any interrupt status bits that might be set
123 temp = ehci_readl(ehci, &ehci->regs->status);
124 ehci_writel(ehci, temp, &ehci->regs->status);
126 /* restore original interrupt enable bits */
127 ehci_writel(ehci, saved_usbintr, &ehci->regs->intr_enable);
131 static int tegra_ehci_hub_control(
140 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
141 struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
142 u32 __iomem *status_reg;
147 status_reg = &ehci->regs->port_status[(wIndex & 0xff) - 1];
149 spin_lock_irqsave(&ehci->lock, flags);
152 * In ehci_hub_control() for USB_PORT_FEAT_ENABLE clears the other bits
153 * that are write on clear, by writing back the register read value, so
154 * USB_PORT_FEAT_ENABLE is handled by masking the set on clear bits
156 if (typeReq == ClearPortFeature && wValue == USB_PORT_FEAT_ENABLE) {
157 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS;
158 ehci_writel(ehci, temp & ~PORT_PE, status_reg);
162 else if (typeReq == GetPortStatus) {
163 temp = ehci_readl(ehci, status_reg);
164 if (tegra->port_resuming && !(temp & PORT_SUSPEND)) {
165 /* Resume completed, re-enable disconnect detection */
166 tegra->port_resuming = 0;
167 tegra_usb_phy_postresume(tegra->phy);
171 else if (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_SUSPEND) {
172 temp = ehci_readl(ehci, status_reg);
173 if ((temp & PORT_PE) == 0 || (temp & PORT_RESET) != 0) {
178 temp &= ~PORT_WKCONN_E;
179 temp |= PORT_WKDISC_E | PORT_WKOC_E;
180 ehci_writel(ehci, temp | PORT_SUSPEND, status_reg);
183 * If a transaction is in progress, there may be a delay in
184 * suspending the port. Poll until the port is suspended.
186 if (handshake(ehci, status_reg, PORT_SUSPEND,
188 pr_err("%s: timeout waiting for SUSPEND\n", __func__);
190 set_bit((wIndex & 0xff) - 1, &ehci->suspended_ports);
194 /* For USB1 port we need to issue Port Reset twice internally */
195 if (tegra->phy->instance == 0 &&
196 (typeReq == SetPortFeature && wValue == USB_PORT_FEAT_RESET)) {
197 spin_unlock_irqrestore(&ehci->lock, flags);
198 return tegra_ehci_internal_port_reset(ehci, status_reg);
202 * Tegra host controller will time the resume operation to clear the bit
203 * when the port control state switches to HS or FS Idle. This behavior
204 * is different from EHCI where the host controller driver is required
205 * to set this bit to a zero after the resume duration is timed in the
208 else if (typeReq == ClearPortFeature &&
209 wValue == USB_PORT_FEAT_SUSPEND) {
210 temp = ehci_readl(ehci, status_reg);
211 if ((temp & PORT_RESET) || !(temp & PORT_PE)) {
216 if (!(temp & PORT_SUSPEND))
219 /* Disable disconnect detection during port resume */
220 tegra_usb_phy_preresume(tegra->phy);
222 ehci->reset_done[wIndex-1] = jiffies + msecs_to_jiffies(25);
224 temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
225 /* start resume signalling */
226 ehci_writel(ehci, temp | PORT_RESUME, status_reg);
228 spin_unlock_irqrestore(&ehci->lock, flags);
230 spin_lock_irqsave(&ehci->lock, flags);
232 /* Poll until the controller clears RESUME and SUSPEND */
233 if (handshake(ehci, status_reg, PORT_RESUME, 0, 2000))
234 pr_err("%s: timeout waiting for RESUME\n", __func__);
235 if (handshake(ehci, status_reg, PORT_SUSPEND, 0, 2000))
236 pr_err("%s: timeout waiting for SUSPEND\n", __func__);
238 ehci->reset_done[wIndex-1] = 0;
240 tegra->port_resuming = 1;
244 spin_unlock_irqrestore(&ehci->lock, flags);
246 /* Handle the hub control events here */
247 return ehci_hub_control(hcd, typeReq, wValue, wIndex, buf, wLength);
249 spin_unlock_irqrestore(&ehci->lock, flags);
253 static void tegra_ehci_restart(struct usb_hcd *hcd)
255 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
259 /* setup the frame list and Async q heads */
260 ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
261 ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
262 /* setup the command register and set the controller in RUN mode */
263 ehci->command &= ~(CMD_LRESET|CMD_IAAD|CMD_PSE|CMD_ASE|CMD_RESET);
264 ehci->command |= CMD_RUN;
265 ehci_writel(ehci, ehci->command, &ehci->regs->command);
267 down_write(&ehci_cf_port_reset_rwsem);
268 ehci_writel(ehci, FLAG_CF, &ehci->regs->configured_flag);
269 /* flush posted writes */
270 ehci_readl(ehci, &ehci->regs->command);
271 up_write(&ehci_cf_port_reset_rwsem);
274 static int tegra_usb_suspend(struct usb_hcd *hcd)
276 struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
277 struct ehci_regs __iomem *hw = tegra->ehci->regs;
280 spin_lock_irqsave(&tegra->ehci->lock, flags);
282 tegra->port_speed = (readl(&hw->port_status[0]) >> 26) & 0x3;
283 ehci_halt(tegra->ehci);
284 clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
286 spin_unlock_irqrestore(&tegra->ehci->lock, flags);
288 tegra_ehci_power_down(hcd);
292 static int tegra_usb_resume(struct usb_hcd *hcd)
294 struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
295 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
296 struct ehci_regs __iomem *hw = ehci->regs;
299 set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
300 tegra_ehci_power_up(hcd);
302 if (tegra->port_speed > TEGRA_USB_PHY_PORT_SPEED_HIGH) {
303 /* Wait for the phy to detect new devices
304 * before we restart the controller */
309 /* Force the phy to keep data lines in suspend state */
310 tegra_ehci_phy_restore_start(tegra->phy, tegra->port_speed);
312 /* Enable host mode */
315 /* Enable Port Power */
316 val = readl(&hw->port_status[0]);
318 writel(val, &hw->port_status[0]);
321 /* Check if the phy resume from LP0. When the phy resume from LP0
322 * USB register will be reset. */
323 if (!readl(&hw->async_next)) {
324 /* Program the field PTC based on the saved speed mode */
325 val = readl(&hw->port_status[0]);
326 val &= ~PORT_TEST(~0);
327 if (tegra->port_speed == TEGRA_USB_PHY_PORT_SPEED_HIGH)
328 val |= PORT_TEST_FORCE;
329 else if (tegra->port_speed == TEGRA_USB_PHY_PORT_SPEED_FULL)
331 else if (tegra->port_speed == TEGRA_USB_PHY_PORT_SPEED_LOW)
333 writel(val, &hw->port_status[0]);
336 /* Disable test mode by setting PTC field to NORMAL_OP */
337 val = readl(&hw->port_status[0]);
338 val &= ~PORT_TEST(~0);
339 writel(val, &hw->port_status[0]);
343 /* Poll until CCS is enabled */
344 if (handshake(ehci, &hw->port_status[0], PORT_CONNECT,
345 PORT_CONNECT, 2000)) {
346 pr_err("%s: timeout waiting for PORT_CONNECT\n", __func__);
350 /* Poll until PE is enabled */
351 if (handshake(ehci, &hw->port_status[0], PORT_PE,
353 pr_err("%s: timeout waiting for USB_PORTSC1_PE\n", __func__);
357 /* Clear the PCI status, to avoid an interrupt taken upon resume */
358 val = readl(&hw->status);
360 writel(val, &hw->status);
362 /* Put controller in suspend mode by writing 1 to SUSP bit of PORTSC */
363 val = readl(&hw->port_status[0]);
364 if ((val & PORT_POWER) && (val & PORT_PE)) {
366 writel(val, &hw->port_status[0]);
368 /* Wait until port suspend completes */
369 if (handshake(ehci, &hw->port_status[0], PORT_SUSPEND,
370 PORT_SUSPEND, 1000)) {
371 pr_err("%s: timeout waiting for PORT_SUSPEND\n",
377 tegra_ehci_phy_restore_end(tegra->phy);
381 if (tegra->port_speed <= TEGRA_USB_PHY_PORT_SPEED_HIGH)
382 tegra_ehci_phy_restore_end(tegra->phy);
384 tegra_ehci_restart(hcd);
388 static void tegra_ehci_shutdown(struct usb_hcd *hcd)
390 struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
392 /* ehci_shutdown touches the USB controller registers, make sure
393 * controller has clocks to it */
394 if (!tegra->host_resumed)
395 tegra_ehci_power_up(hcd);
400 static int tegra_ehci_setup(struct usb_hcd *hcd)
402 struct ehci_hcd *ehci = hcd_to_ehci(hcd);
405 /* EHCI registers start at offset 0x100 */
406 ehci->caps = hcd->regs + 0x100;
407 ehci->regs = hcd->regs + 0x100 +
408 HC_LENGTH(ehci, readl(&ehci->caps->hc_capbase));
410 dbg_hcs_params(ehci, "reset");
411 dbg_hcc_params(ehci, "reset");
413 /* cache this readonly data; minimize chip reads */
414 ehci->hcs_params = readl(&ehci->caps->hcs_params);
416 /* switch to host mode */
420 retval = ehci_halt(ehci);
424 /* data structure init */
425 retval = ehci_init(hcd);
431 ehci_port_power(ehci, 1);
436 static int tegra_ehci_bus_suspend(struct usb_hcd *hcd)
438 struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
439 int error_status = 0;
441 error_status = ehci_bus_suspend(hcd);
442 if (!error_status && tegra->power_down_on_bus_suspend) {
443 tegra_usb_suspend(hcd);
444 tegra->bus_suspended = 1;
450 static int tegra_ehci_bus_resume(struct usb_hcd *hcd)
452 struct tegra_ehci_hcd *tegra = dev_get_drvdata(hcd->self.controller);
454 if (tegra->bus_suspended && tegra->power_down_on_bus_suspend) {
455 tegra_usb_resume(hcd);
456 tegra->bus_suspended = 0;
459 tegra_usb_phy_preresume(tegra->phy);
460 tegra->port_resuming = 1;
461 return ehci_bus_resume(hcd);
467 void *old_xfer_buffer;
471 static void free_temp_buffer(struct urb *urb)
473 enum dma_data_direction dir;
474 struct temp_buffer *temp;
476 if (!(urb->transfer_flags & URB_ALIGNED_TEMP_BUFFER))
479 dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
481 temp = container_of(urb->transfer_buffer, struct temp_buffer,
484 if (dir == DMA_FROM_DEVICE)
485 memcpy(temp->old_xfer_buffer, temp->data,
486 urb->transfer_buffer_length);
487 urb->transfer_buffer = temp->old_xfer_buffer;
488 kfree(temp->kmalloc_ptr);
490 urb->transfer_flags &= ~URB_ALIGNED_TEMP_BUFFER;
493 static int alloc_temp_buffer(struct urb *urb, gfp_t mem_flags)
495 enum dma_data_direction dir;
496 struct temp_buffer *temp, *kmalloc_ptr;
499 if (urb->num_sgs || urb->sg ||
500 urb->transfer_buffer_length == 0 ||
501 !((uintptr_t)urb->transfer_buffer & (TEGRA_USB_DMA_ALIGN - 1)))
504 dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
506 /* Allocate a buffer with enough padding for alignment */
507 kmalloc_size = urb->transfer_buffer_length +
508 sizeof(struct temp_buffer) + TEGRA_USB_DMA_ALIGN - 1;
510 kmalloc_ptr = kmalloc(kmalloc_size, mem_flags);
514 /* Position our struct temp_buffer such that data is aligned */
515 temp = PTR_ALIGN(kmalloc_ptr + 1, TEGRA_USB_DMA_ALIGN) - 1;
517 temp->kmalloc_ptr = kmalloc_ptr;
518 temp->old_xfer_buffer = urb->transfer_buffer;
519 if (dir == DMA_TO_DEVICE)
520 memcpy(temp->data, urb->transfer_buffer,
521 urb->transfer_buffer_length);
522 urb->transfer_buffer = temp->data;
524 urb->transfer_flags |= URB_ALIGNED_TEMP_BUFFER;
529 static int tegra_ehci_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
534 ret = alloc_temp_buffer(urb, mem_flags);
538 ret = usb_hcd_map_urb_for_dma(hcd, urb, mem_flags);
540 free_temp_buffer(urb);
545 static void tegra_ehci_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
547 usb_hcd_unmap_urb_for_dma(hcd, urb);
548 free_temp_buffer(urb);
551 static const struct hc_driver tegra_ehci_hc_driver = {
552 .description = hcd_name,
553 .product_desc = "Tegra EHCI Host Controller",
554 .hcd_priv_size = sizeof(struct ehci_hcd),
556 .flags = HCD_USB2 | HCD_MEMORY,
558 .reset = tegra_ehci_setup,
563 .shutdown = tegra_ehci_shutdown,
564 .urb_enqueue = ehci_urb_enqueue,
565 .urb_dequeue = ehci_urb_dequeue,
566 .map_urb_for_dma = tegra_ehci_map_urb_for_dma,
567 .unmap_urb_for_dma = tegra_ehci_unmap_urb_for_dma,
568 .endpoint_disable = ehci_endpoint_disable,
569 .endpoint_reset = ehci_endpoint_reset,
570 .get_frame_number = ehci_get_frame,
571 .hub_status_data = ehci_hub_status_data,
572 .hub_control = tegra_ehci_hub_control,
573 .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
575 .bus_suspend = tegra_ehci_bus_suspend,
576 .bus_resume = tegra_ehci_bus_resume,
578 .relinquish_port = ehci_relinquish_port,
579 .port_handed_over = ehci_port_handed_over,
582 static int setup_vbus_gpio(struct platform_device *pdev)
587 if (!pdev->dev.of_node)
590 gpio = of_get_named_gpio(pdev->dev.of_node, "nvidia,vbus-gpio", 0);
591 if (!gpio_is_valid(gpio))
594 err = gpio_request(gpio, "vbus_gpio");
596 dev_err(&pdev->dev, "can't request vbus gpio %d", gpio);
599 err = gpio_direction_output(gpio, 1);
601 dev_err(&pdev->dev, "can't enable vbus\n");
604 gpio_set_value(gpio, 1);
609 static u64 tegra_ehci_dma_mask = DMA_BIT_MASK(32);
611 static int tegra_ehci_probe(struct platform_device *pdev)
613 struct resource *res;
615 struct tegra_ehci_hcd *tegra;
616 struct tegra_ehci_platform_data *pdata;
619 int instance = pdev->id;
621 pdata = pdev->dev.platform_data;
623 dev_err(&pdev->dev, "Platform data missing\n");
627 /* Right now device-tree probed devices don't get dma_mask set.
628 * Since shared usb code relies on it, set it here for now.
629 * Once we have dma capability bindings this can go away.
631 if (!pdev->dev.dma_mask)
632 pdev->dev.dma_mask = &tegra_ehci_dma_mask;
634 setup_vbus_gpio(pdev);
636 tegra = kzalloc(sizeof(struct tegra_ehci_hcd), GFP_KERNEL);
640 hcd = usb_create_hcd(&tegra_ehci_hc_driver, &pdev->dev,
641 dev_name(&pdev->dev));
643 dev_err(&pdev->dev, "Unable to create HCD\n");
648 platform_set_drvdata(pdev, tegra);
650 tegra->clk = clk_get(&pdev->dev, NULL);
651 if (IS_ERR(tegra->clk)) {
652 dev_err(&pdev->dev, "Can't get ehci clock\n");
653 err = PTR_ERR(tegra->clk);
657 err = clk_enable(tegra->clk);
661 tegra->emc_clk = clk_get(&pdev->dev, "emc");
662 if (IS_ERR(tegra->emc_clk)) {
663 dev_err(&pdev->dev, "Can't get emc clock\n");
664 err = PTR_ERR(tegra->emc_clk);
668 clk_enable(tegra->emc_clk);
669 clk_set_rate(tegra->emc_clk, 400000000);
671 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
673 dev_err(&pdev->dev, "Failed to get I/O memory\n");
677 hcd->rsrc_start = res->start;
678 hcd->rsrc_len = resource_size(res);
679 hcd->regs = ioremap(res->start, resource_size(res));
681 dev_err(&pdev->dev, "Failed to remap I/O memory\n");
686 /* This is pretty ugly and needs to be fixed when we do only
687 * device-tree probing. Old code relies on the platform_device
688 * numbering that we lack for device-tree-instantiated devices.
691 switch (res->start) {
695 case TEGRA_USB2_BASE:
698 case TEGRA_USB3_BASE:
703 dev_err(&pdev->dev, "unknown usb instance\n");
708 tegra->phy = tegra_usb_phy_open(instance, hcd->regs, pdata->phy_config,
709 TEGRA_USB_PHY_MODE_HOST);
710 if (IS_ERR(tegra->phy)) {
711 dev_err(&pdev->dev, "Failed to open USB phy\n");
716 err = tegra_usb_phy_power_on(tegra->phy);
718 dev_err(&pdev->dev, "Failed to power on the phy\n");
722 tegra->host_resumed = 1;
723 tegra->power_down_on_bus_suspend = pdata->power_down_on_bus_suspend;
724 tegra->ehci = hcd_to_ehci(hcd);
726 irq = platform_get_irq(pdev, 0);
728 dev_err(&pdev->dev, "Failed to get IRQ\n");
732 set_irq_flags(irq, IRQF_VALID);
734 #ifdef CONFIG_USB_OTG_UTILS
735 if (pdata->operating_mode == TEGRA_USB_OTG) {
736 tegra->transceiver = otg_get_transceiver();
737 if (tegra->transceiver)
738 otg_set_host(tegra->transceiver, &hcd->self);
742 err = usb_add_hcd(hcd, irq, IRQF_SHARED);
744 dev_err(&pdev->dev, "Failed to add USB HCD\n");
751 #ifdef CONFIG_USB_OTG_UTILS
752 if (tegra->transceiver) {
753 otg_set_host(tegra->transceiver, NULL);
754 otg_put_transceiver(tegra->transceiver);
757 tegra_usb_phy_close(tegra->phy);
761 clk_disable(tegra->emc_clk);
762 clk_put(tegra->emc_clk);
764 clk_disable(tegra->clk);
775 static int tegra_ehci_resume(struct platform_device *pdev)
777 struct tegra_ehci_hcd *tegra = platform_get_drvdata(pdev);
778 struct usb_hcd *hcd = ehci_to_hcd(tegra->ehci);
780 if (tegra->bus_suspended)
783 return tegra_usb_resume(hcd);
786 static int tegra_ehci_suspend(struct platform_device *pdev, pm_message_t state)
788 struct tegra_ehci_hcd *tegra = platform_get_drvdata(pdev);
789 struct usb_hcd *hcd = ehci_to_hcd(tegra->ehci);
791 if (tegra->bus_suspended)
794 if (time_before(jiffies, tegra->ehci->next_statechange))
797 return tegra_usb_suspend(hcd);
801 static int tegra_ehci_remove(struct platform_device *pdev)
803 struct tegra_ehci_hcd *tegra = platform_get_drvdata(pdev);
804 struct usb_hcd *hcd = ehci_to_hcd(tegra->ehci);
806 if (tegra == NULL || hcd == NULL)
809 #ifdef CONFIG_USB_OTG_UTILS
810 if (tegra->transceiver) {
811 otg_set_host(tegra->transceiver, NULL);
812 otg_put_transceiver(tegra->transceiver);
819 tegra_usb_phy_close(tegra->phy);
822 clk_disable(tegra->clk);
825 clk_disable(tegra->emc_clk);
826 clk_put(tegra->emc_clk);
832 static void tegra_ehci_hcd_shutdown(struct platform_device *pdev)
834 struct tegra_ehci_hcd *tegra = platform_get_drvdata(pdev);
835 struct usb_hcd *hcd = ehci_to_hcd(tegra->ehci);
837 if (hcd->driver->shutdown)
838 hcd->driver->shutdown(hcd);
841 static struct of_device_id tegra_ehci_of_match[] __devinitdata = {
842 { .compatible = "nvidia,tegra20-ehci", },
846 static struct platform_driver tegra_ehci_driver = {
847 .probe = tegra_ehci_probe,
848 .remove = tegra_ehci_remove,
850 .suspend = tegra_ehci_suspend,
851 .resume = tegra_ehci_resume,
853 .shutdown = tegra_ehci_hcd_shutdown,
855 .name = "tegra-ehci",
856 .of_match_table = tegra_ehci_of_match,