USB: extend ehci-fsl and fsl_udc_core driver for OTG operation
Signed-off-by: Anatolij Gustschin <agust@denx.de> Cc: Li Yang <leoli@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Anatolij Gustschin
Greg Kroah-Hartman
parent
0807c500a1
commit
83722bc943
6 changed files with 213 additions and 15 deletions
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@ -353,6 +353,19 @@ static void dr_controller_stop(struct fsl_udc *udc)
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{
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unsigned int tmp;
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pr_debug("%s\n", __func__);
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/* if we're in OTG mode, and the Host is currently using the port,
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* stop now and don't rip the controller out from under the
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* ehci driver
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*/
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if (udc->gadget.is_otg) {
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if (!(fsl_readl(&dr_regs->otgsc) & OTGSC_STS_USB_ID)) {
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pr_debug("udc: Leaving early\n");
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return;
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}
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}
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/* disable all INTR */
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fsl_writel(0, &dr_regs->usbintr);
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@ -1668,6 +1681,9 @@ static void port_change_irq(struct fsl_udc *udc)
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{
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u32 speed;
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if (udc->bus_reset)
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udc->bus_reset = 0;
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/* Bus resetting is finished */
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if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
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/* Get the speed */
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@ -1775,6 +1791,8 @@ static void reset_irq(struct fsl_udc *udc)
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if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
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VDBG("Bus reset");
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/* Bus is reseting */
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udc->bus_reset = 1;
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/* Reset all the queues, include XD, dTD, EP queue
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* head and TR Queue */
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reset_queues(udc);
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@ -1852,6 +1870,7 @@ static irqreturn_t fsl_udc_irq(int irq, void *_udc)
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/* Reset Received */
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if (irq_src & USB_STS_RESET) {
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VDBG("reset int");
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reset_irq(udc);
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status = IRQ_HANDLED;
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}
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@ -1909,11 +1928,30 @@ int usb_gadget_probe_driver(struct usb_gadget_driver *driver,
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goto out;
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}
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/* Enable DR IRQ reg and Set usbcmd reg Run bit */
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dr_controller_run(udc_controller);
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udc_controller->usb_state = USB_STATE_ATTACHED;
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udc_controller->ep0_state = WAIT_FOR_SETUP;
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udc_controller->ep0_dir = 0;
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if (udc_controller->transceiver) {
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/* Suspend the controller until OTG enable it */
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udc_controller->stopped = 1;
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printk(KERN_INFO "Suspend udc for OTG auto detect\n");
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/* connect to bus through transceiver */
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if (udc_controller->transceiver) {
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retval = otg_set_peripheral(udc_controller->transceiver,
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&udc_controller->gadget);
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if (retval < 0) {
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ERR("can't bind to transceiver\n");
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driver->unbind(&udc_controller->gadget);
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udc_controller->gadget.dev.driver = 0;
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udc_controller->driver = 0;
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return retval;
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}
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}
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} else {
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/* Enable DR IRQ reg and set USBCMD reg Run bit */
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dr_controller_run(udc_controller);
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udc_controller->usb_state = USB_STATE_ATTACHED;
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udc_controller->ep0_state = WAIT_FOR_SETUP;
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udc_controller->ep0_dir = 0;
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}
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printk(KERN_INFO "%s: bind to driver %s\n",
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udc_controller->gadget.name, driver->driver.name);
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@ -2374,17 +2412,30 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
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spin_lock_init(&udc_controller->lock);
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udc_controller->stopped = 1;
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#ifdef CONFIG_USB_OTG
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if (pdata->operating_mode == FSL_USB2_DR_OTG) {
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udc_controller->transceiver = otg_get_transceiver();
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if (!udc_controller->transceiver) {
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ERR("Can't find OTG driver!\n");
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ret = -ENODEV;
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goto err_kfree;
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}
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}
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#endif
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res) {
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ret = -ENXIO;
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goto err_kfree;
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}
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if (!request_mem_region(res->start, res->end - res->start + 1,
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driver_name)) {
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ERR("request mem region for %s failed\n", pdev->name);
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ret = -EBUSY;
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goto err_kfree;
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if (pdata->operating_mode == FSL_USB2_DR_DEVICE) {
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if (!request_mem_region(res->start, res->end - res->start + 1,
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driver_name)) {
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ERR("request mem region for %s failed\n", pdev->name);
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ret = -EBUSY;
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goto err_kfree;
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}
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}
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dr_regs = ioremap(res->start, resource_size(res));
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@ -2455,9 +2506,11 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
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goto err_free_irq;
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}
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/* initialize usb hw reg except for regs for EP,
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* leave usbintr reg untouched */
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dr_controller_setup(udc_controller);
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if (!udc_controller->transceiver) {
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/* initialize usb hw reg except for regs for EP,
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* leave usbintr reg untouched */
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dr_controller_setup(udc_controller);
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}
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fsl_udc_clk_finalize(pdev);
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@ -2477,6 +2530,9 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
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if (ret < 0)
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goto err_free_irq;
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if (udc_controller->transceiver)
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udc_controller->gadget.is_otg = 1;
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/* setup QH and epctrl for ep0 */
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ep0_setup(udc_controller);
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@ -2521,7 +2577,8 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
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err_iounmap_noclk:
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iounmap(dr_regs);
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err_release_mem_region:
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release_mem_region(res->start, res->end - res->start + 1);
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if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
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release_mem_region(res->start, res->end - res->start + 1);
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err_kfree:
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kfree(udc_controller);
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udc_controller = NULL;
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@ -2555,7 +2612,8 @@ static int __exit fsl_udc_remove(struct platform_device *pdev)
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dma_pool_destroy(udc_controller->td_pool);
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free_irq(udc_controller->irq, udc_controller);
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iounmap(dr_regs);
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release_mem_region(res->start, res->end - res->start + 1);
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if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
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release_mem_region(res->start, res->end - res->start + 1);
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device_unregister(&udc_controller->gadget.dev);
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/* free udc --wait for the release() finished */
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@ -2598,6 +2656,62 @@ static int fsl_udc_resume(struct platform_device *pdev)
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return 0;
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}
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static int fsl_udc_otg_suspend(struct device *dev, pm_message_t state)
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{
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struct fsl_udc *udc = udc_controller;
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u32 mode, usbcmd;
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mode = fsl_readl(&dr_regs->usbmode) & USB_MODE_CTRL_MODE_MASK;
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pr_debug("%s(): mode 0x%x stopped %d\n", __func__, mode, udc->stopped);
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/*
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* If the controller is already stopped, then this must be a
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* PM suspend. Remember this fact, so that we will leave the
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* controller stopped at PM resume time.
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*/
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if (udc->stopped) {
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pr_debug("gadget already stopped, leaving early\n");
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udc->already_stopped = 1;
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return 0;
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}
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if (mode != USB_MODE_CTRL_MODE_DEVICE) {
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pr_debug("gadget not in device mode, leaving early\n");
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return 0;
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}
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/* stop the controller */
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usbcmd = fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP;
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fsl_writel(usbcmd, &dr_regs->usbcmd);
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udc->stopped = 1;
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pr_info("USB Gadget suspended\n");
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return 0;
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}
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static int fsl_udc_otg_resume(struct device *dev)
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{
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pr_debug("%s(): stopped %d already_stopped %d\n", __func__,
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udc_controller->stopped, udc_controller->already_stopped);
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/*
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* If the controller was stopped at suspend time, then
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* don't resume it now.
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*/
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if (udc_controller->already_stopped) {
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udc_controller->already_stopped = 0;
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pr_debug("gadget was already stopped, leaving early\n");
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return 0;
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}
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pr_info("USB Gadget resume\n");
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return fsl_udc_resume(NULL);
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}
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/*-------------------------------------------------------------------------
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Register entry point for the peripheral controller driver
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--------------------------------------------------------------------------*/
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@ -2610,6 +2724,9 @@ static struct platform_driver udc_driver = {
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.driver = {
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.name = (char *)driver_name,
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.owner = THIS_MODULE,
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/* udc suspend/resume called from OTG driver */
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.suspend = fsl_udc_otg_suspend,
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.resume = fsl_udc_otg_resume,
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},
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};
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@ -476,6 +476,7 @@ struct fsl_udc {
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unsigned vbus_active:1;
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unsigned stopped:1;
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unsigned remote_wakeup:1;
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unsigned already_stopped:1;
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unsigned big_endian_desc:1;
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struct ep_queue_head *ep_qh; /* Endpoints Queue-Head */
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@ -487,6 +488,7 @@ struct fsl_udc {
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dma_addr_t ep_qh_dma; /* dma address of QH */
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u32 max_pipes; /* Device max pipes */
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u32 bus_reset; /* Device is bus resetting */
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u32 resume_state; /* USB state to resume */
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u32 usb_state; /* USB current state */
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u32 ep0_state; /* Endpoint zero state */
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@ -117,6 +117,9 @@ static int usb_hcd_fsl_probe(const struct hc_driver *driver,
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pdata->regs = hcd->regs;
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if (pdata->power_budget)
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hcd->power_budget = pdata->power_budget;
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/*
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* do platform specific init: check the clock, grab/config pins, etc.
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*/
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@ -134,6 +137,30 @@ static int usb_hcd_fsl_probe(const struct hc_driver *driver,
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retval = usb_add_hcd(hcd, irq, IRQF_DISABLED | IRQF_SHARED);
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if (retval != 0)
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goto err4;
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#ifdef CONFIG_USB_OTG
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if (pdata->operating_mode == FSL_USB2_DR_OTG) {
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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ehci->transceiver = otg_get_transceiver();
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dev_dbg(&pdev->dev, "hcd=0x%p ehci=0x%p, transceiver=0x%p\n",
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hcd, ehci, ehci->transceiver);
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if (ehci->transceiver) {
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retval = otg_set_host(ehci->transceiver,
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&ehci_to_hcd(ehci)->self);
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if (retval) {
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if (ehci->transceiver)
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put_device(ehci->transceiver->dev);
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goto err4;
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}
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} else {
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dev_err(&pdev->dev, "can't find transceiver\n");
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retval = -ENODEV;
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goto err4;
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}
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}
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#endif
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return retval;
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err4:
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@ -164,6 +191,12 @@ static void usb_hcd_fsl_remove(struct usb_hcd *hcd,
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struct platform_device *pdev)
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{
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struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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if (ehci->transceiver) {
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otg_set_host(ehci->transceiver, NULL);
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put_device(ehci->transceiver->dev);
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}
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usb_remove_hcd(hcd);
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@ -544,6 +577,38 @@ static struct dev_pm_ops ehci_fsl_pm_ops = {
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#define EHCI_FSL_PM_OPS NULL
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#endif /* CONFIG_PM */
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#ifdef CONFIG_USB_OTG
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static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
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{
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struct ehci_hcd *ehci = hcd_to_ehci(hcd);
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u32 status;
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if (!port)
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return -EINVAL;
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port--;
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/* start port reset before HNP protocol time out */
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status = readl(&ehci->regs->port_status[port]);
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if (!(status & PORT_CONNECT))
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return -ENODEV;
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/* khubd will finish the reset later */
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if (ehci_is_TDI(ehci)) {
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writel(PORT_RESET |
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(status & ~(PORT_CSC | PORT_PEC | PORT_OCC)),
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&ehci->regs->port_status[port]);
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} else {
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writel(PORT_RESET, &ehci->regs->port_status[port]);
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}
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return 0;
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}
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#else
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#define ehci_start_port_reset NULL
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#endif /* CONFIG_USB_OTG */
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static const struct hc_driver ehci_fsl_hc_driver = {
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.description = hcd_name,
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.product_desc = "Freescale On-Chip EHCI Host Controller",
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@ -583,6 +648,7 @@ static const struct hc_driver ehci_fsl_hc_driver = {
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.hub_control = ehci_hub_control,
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.bus_suspend = ehci_bus_suspend,
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.bus_resume = ehci_bus_resume,
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.start_port_reset = ehci_start_port_reset,
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.relinquish_port = ehci_relinquish_port,
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.port_handed_over = ehci_port_handed_over,
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@ -27,6 +27,7 @@
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*/
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/*-------------------------------------------------------------------------*/
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#include <linux/usb/otg.h>
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#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
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@ -801,6 +802,13 @@ static int ehci_hub_control (
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goto error;
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if (ehci->no_selective_suspend)
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break;
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#ifdef CONFIG_USB_OTG
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if ((hcd->self.otg_port == (wIndex + 1))
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&& hcd->self.b_hnp_enable) {
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otg_start_hnp(ehci->transceiver);
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break;
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}
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#endif
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if (!(temp & PORT_SUSPEND))
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break;
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if ((temp & PORT_PE) == 0)
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@ -161,6 +161,10 @@ struct ehci_hcd { /* one per controller */
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#ifdef DEBUG
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struct dentry *debug_dir;
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#endif
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/*
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* OTG controllers and transceivers need software interaction
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*/
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struct otg_transceiver *transceiver;
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};
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/* convert between an HCD pointer and the corresponding EHCI_HCD */
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@ -72,6 +72,7 @@ struct fsl_usb2_platform_data {
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void (*exit)(struct platform_device *);
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void __iomem *regs; /* ioremap'd register base */
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struct clk *clk;
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unsigned power_budget; /* hcd->power_budget */
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unsigned big_endian_mmio:1;
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unsigned big_endian_desc:1;
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unsigned es:1; /* need USBMODE:ES */
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