#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
-#include <linux/version.h>
#include <linux/errno.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/clk.h>
#include <linux/irq.h>
+#include <linux/gpio.h>
#include <asm/byteorder.h>
-#include <asm/hardware.h>
+#include <mach/hardware.h>
#include <linux/usb.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
-#include <asm/arch/pxa2xx-regs.h> /* FIXME: for PSSR */
-#include <asm/arch/udc.h>
+#include <mach/pxa2xx-regs.h> /* FIXME: for PSSR */
+#include <mach/udc.h>
#include "pxa27x_udc.h"
goto err_queues;
eps = debugfs_create_file("epstate", 0400, root, udc,
&eps_dbg_fops);
- if (!queues)
+ if (!eps)
goto err_eps;
udc->debugfs_root = root;
/**
* pio_irq_disable - Disables irq generation for one endpoint
* @ep: udc endpoint
- * @index: endpoint number
*/
static void pio_irq_disable(struct pxa_ep *ep)
{
* inc_ep_stats_bytes - Update ep stats counts
* @ep: physical endpoint
* @count: bytes transfered on endpoint
- * @req: usb request
* @is_in: ep direction (USB_DIR_IN or 0)
*/
static void inc_ep_stats_bytes(struct pxa_ep *ep, int count, int is_in)
struct pxa27x_request *req;
req = kzalloc(sizeof *req, gfp_flags);
- if (!req || !_ep)
+ if (!req)
return NULL;
INIT_LIST_HEAD(&req->queue);
}
/**
- * ep_end_out_req - Ends control endpoint in request
+ * ep_end_out_req - Ends endpoint OUT request
* @ep: physical endpoint
* @req: pxa request
*
* Context: ep->lock held
*
- * Ends endpoint in request (completes usb request).
+ * Ends endpoint OUT request (completes usb request).
*/
static void ep_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req)
{
}
/**
- * ep0_end_out_req - Ends control endpoint in request (ends data stage)
+ * ep0_end_out_req - Ends control endpoint OUT request (ends data stage)
* @ep: physical endpoint
* @req: pxa request
*
* Context: ep->lock held
*
- * Ends control endpoint in request (completes usb request), and puts
+ * Ends control endpoint OUT request (completes usb request), and puts
* control endpoint into idle state
*/
static void ep0_end_out_req(struct pxa_ep *ep, struct pxa27x_request *req)
}
/**
- * ep_end_in_req - Ends endpoint out request
+ * ep_end_in_req - Ends endpoint IN request
* @ep: physical endpoint
* @req: pxa request
*
* Context: ep->lock held
*
- * Ends endpoint out request (completes usb request).
+ * Ends endpoint IN request (completes usb request).
*/
static void ep_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req)
{
}
/**
- * ep0_end_in_req - Ends control endpoint out request (ends data stage)
+ * ep0_end_in_req - Ends control endpoint IN request (ends data stage)
* @ep: physical endpoint
* @req: pxa request
*
* Context: ep->lock held
*
- * Ends control endpoint out request (completes usb request), and puts
+ * Ends control endpoint IN request (completes usb request), and puts
* control endpoint into status state
*/
static void ep0_end_in_req(struct pxa_ep *ep, struct pxa27x_request *req)
{
- struct pxa_udc *udc = ep->dev;
-
- set_ep0state(udc, IN_STATUS_STAGE);
+ set_ep0state(ep->dev, IN_STATUS_STAGE);
ep_end_in_req(ep, req);
}
ep_end_in_req(ep, req);
} else {
ep_err(ep, "got a request of %d bytes while"
- "in state WATI_ACK_SET_CONF_INTERF\n",
+ "in state WAIT_ACK_SET_CONF_INTERF\n",
length);
ep_del_request(ep, req);
rc = -EL2HLT;
struct udc_usb_ep *udc_usb_ep;
struct pxa27x_request *req;
unsigned long flags;
- int rc;
+ int rc = -EINVAL;
if (!_ep)
- return -EINVAL;
+ return rc;
udc_usb_ep = container_of(_ep, struct udc_usb_ep, usb_ep);
ep = udc_usb_ep->pxa_ep;
if (!ep || is_ep0(ep))
- return -EINVAL;
+ return rc;
spin_lock_irqsave(&ep->lock, flags);
/* make sure it's actually queued on this endpoint */
list_for_each_entry(req, &ep->queue, queue) {
- if (&req->req == _req)
+ if (&req->req == _req) {
+ req_done(ep, req, -ECONNRESET);
+ rc = 0;
break;
+ }
}
- rc = -EINVAL;
- if (&req->req != _req)
- goto out;
-
- rc = 0;
- req_done(ep, req, -ECONNRESET);
-out:
spin_unlock_irqrestore(&ep->lock, flags);
return rc;
}
.fifo_flush = pxa_ep_fifo_flush,
};
+/**
+ * dplus_pullup - Connect or disconnect pullup resistor to D+ pin
+ * @udc: udc device
+ * @on: 0 if disconnect pullup resistor, 1 otherwise
+ * Context: any
+ *
+ * Handle D+ pullup resistor, make the device visible to the usb bus, and
+ * declare it as a full speed usb device
+ */
+static void dplus_pullup(struct pxa_udc *udc, int on)
+{
+ if (on) {
+ if (gpio_is_valid(udc->mach->gpio_pullup))
+ gpio_set_value(udc->mach->gpio_pullup,
+ !udc->mach->gpio_pullup_inverted);
+ if (udc->mach->udc_command)
+ udc->mach->udc_command(PXA2XX_UDC_CMD_CONNECT);
+ } else {
+ if (gpio_is_valid(udc->mach->gpio_pullup))
+ gpio_set_value(udc->mach->gpio_pullup,
+ udc->mach->gpio_pullup_inverted);
+ if (udc->mach->udc_command)
+ udc->mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT);
+ }
+ udc->pullup_on = on;
+}
/**
* pxa_udc_get_frame - Returns usb frame number
return 0;
}
+static void udc_enable(struct pxa_udc *udc);
+static void udc_disable(struct pxa_udc *udc);
+
+/**
+ * should_enable_udc - Tells if UDC should be enabled
+ * @udc: udc device
+ * Context: any
+ *
+ * The UDC should be enabled if :
+
+ * - the pullup resistor is connected
+ * - and a gadget driver is bound
+ * - and vbus is sensed (or no vbus sense is available)
+ *
+ * Returns 1 if UDC should be enabled, 0 otherwise
+ */
+static int should_enable_udc(struct pxa_udc *udc)
+{
+ int put_on;
+
+ put_on = ((udc->pullup_on) && (udc->driver));
+ put_on &= ((udc->vbus_sensed) || (!udc->transceiver));
+ return put_on;
+}
+
+/**
+ * should_disable_udc - Tells if UDC should be disabled
+ * @udc: udc device
+ * Context: any
+ *
+ * The UDC should be disabled if :
+ * - the pullup resistor is not connected
+ * - or no gadget driver is bound
+ * - or no vbus is sensed (when vbus sesing is available)
+ *
+ * Returns 1 if UDC should be disabled
+ */
+static int should_disable_udc(struct pxa_udc *udc)
+{
+ int put_off;
+
+ put_off = ((!udc->pullup_on) || (!udc->driver));
+ put_off |= ((!udc->vbus_sensed) && (udc->transceiver));
+ return put_off;
+}
+
+/**
+ * pxa_udc_pullup - Offer manual D+ pullup control
+ * @_gadget: usb gadget using the control
+ * @is_active: 0 if disconnect, else connect D+ pullup resistor
+ * Context: !in_interrupt()
+ *
+ * Returns 0 if OK, -EOPNOTSUPP if udc driver doesn't handle D+ pullup
+ */
+static int pxa_udc_pullup(struct usb_gadget *_gadget, int is_active)
+{
+ struct pxa_udc *udc = to_gadget_udc(_gadget);
+
+ if (!gpio_is_valid(udc->mach->gpio_pullup) && !udc->mach->udc_command)
+ return -EOPNOTSUPP;
+
+ dplus_pullup(udc, is_active);
+
+ if (should_enable_udc(udc))
+ udc_enable(udc);
+ if (should_disable_udc(udc))
+ udc_disable(udc);
+ return 0;
+}
+
+static void udc_enable(struct pxa_udc *udc);
+static void udc_disable(struct pxa_udc *udc);
+
+/**
+ * pxa_udc_vbus_session - Called by external transceiver to enable/disable udc
+ * @_gadget: usb gadget
+ * @is_active: 0 if should disable the udc, 1 if should enable
+ *
+ * Enables the udc, and optionnaly activates D+ pullup resistor. Or disables the
+ * udc, and deactivates D+ pullup resistor.
+ *
+ * Returns 0
+ */
+static int pxa_udc_vbus_session(struct usb_gadget *_gadget, int is_active)
+{
+ struct pxa_udc *udc = to_gadget_udc(_gadget);
+
+ udc->vbus_sensed = is_active;
+ if (should_enable_udc(udc))
+ udc_enable(udc);
+ if (should_disable_udc(udc))
+ udc_disable(udc);
+
+ return 0;
+}
+
+/**
+ * pxa_udc_vbus_draw - Called by gadget driver after SET_CONFIGURATION completed
+ * @_gadget: usb gadget
+ * @mA: current drawn
+ *
+ * Context: !in_interrupt()
+ *
+ * Called after a configuration was chosen by a USB host, to inform how much
+ * current can be drawn by the device from VBus line.
+ *
+ * Returns 0 or -EOPNOTSUPP if no transceiver is handling the udc
+ */
+static int pxa_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
+{
+ struct pxa_udc *udc;
+
+ udc = to_gadget_udc(_gadget);
+ if (udc->transceiver)
+ return otg_set_power(udc->transceiver, mA);
+ return -EOPNOTSUPP;
+}
+
static const struct usb_gadget_ops pxa_udc_ops = {
.get_frame = pxa_udc_get_frame,
.wakeup = pxa_udc_wakeup,
- /* current versions must always be self-powered */
+ .pullup = pxa_udc_pullup,
+ .vbus_session = pxa_udc_vbus_session,
+ .vbus_draw = pxa_udc_vbus_draw,
};
/**
* udc_disable - disable udc device controller
* @udc: udc device
+ * Context: any
*
* Disables the udc device : disables clocks, udc interrupts, control endpoint
* interrupts.
*/
static void udc_disable(struct pxa_udc *udc)
{
+ if (!udc->enabled)
+ return;
+
udc_writel(udc, UDCICR0, 0);
udc_writel(udc, UDCICR1, 0);
ep0_idle(udc);
udc->gadget.speed = USB_SPEED_UNKNOWN;
- if (udc->mach->udc_command)
- udc->mach->udc_command(PXA2XX_UDC_CMD_DISCONNECT);
+
+ udc->enabled = 0;
}
/**
}
/* USB endpoints init */
- for (i = 0; i < NR_USB_ENDPOINTS; i++)
- if (i != 0)
- list_add_tail(&dev->udc_usb_ep[i].usb_ep.ep_list,
- &dev->gadget.ep_list);
+ for (i = 1; i < NR_USB_ENDPOINTS; i++)
+ list_add_tail(&dev->udc_usb_ep[i].usb_ep.ep_list,
+ &dev->gadget.ep_list);
}
/**
*/
static void udc_enable(struct pxa_udc *udc)
{
+ if (udc->enabled)
+ return;
+
udc_writel(udc, UDCICR0, 0);
udc_writel(udc, UDCICR1, 0);
- udc_writel(udc, UP2OCR, UP2OCR_HXOE);
udc_clear_mask_UDCCR(udc, UDCCR_UDE);
clk_enable(udc->clk);
/* enable ep0 irqs */
pio_irq_enable(&udc->pxa_ep[0]);
- dev_info(udc->dev, "UDC connecting\n");
- if (udc->mach->udc_command)
- udc->mach->udc_command(PXA2XX_UDC_CMD_CONNECT);
+ udc->enabled = 1;
}
/**
* usb traffic follows until a disconnect is reported. Then a host may connect
* again, or the driver might get unbound.
*
+ * Note that the udc is not automatically enabled. Check function
+ * should_enable_udc().
+ *
* Returns 0 if no error, -EINVAL, -ENODEV, -EBUSY otherwise
*/
int usb_gadget_register_driver(struct usb_gadget_driver *driver)
struct pxa_udc *udc = the_controller;
int retval;
- if (!driver || driver->speed != USB_SPEED_FULL || !driver->bind
+ if (!driver || driver->speed < USB_SPEED_FULL || !driver->bind
|| !driver->disconnect || !driver->setup)
return -EINVAL;
if (!udc)
/* first hook up the driver ... */
udc->driver = driver;
udc->gadget.dev.driver = &driver->driver;
+ dplus_pullup(udc, 1);
retval = device_add(&udc->gadget.dev);
if (retval) {
dev_dbg(udc->dev, "registered gadget driver '%s'\n",
driver->driver.name);
- udc_enable(udc);
+ if (udc->transceiver) {
+ retval = otg_set_peripheral(udc->transceiver, &udc->gadget);
+ if (retval) {
+ dev_err(udc->dev, "can't bind to transceiver\n");
+ goto transceiver_fail;
+ }
+ }
+
+ if (should_enable_udc(udc))
+ udc_enable(udc);
return 0;
+transceiver_fail:
+ if (driver->unbind)
+ driver->unbind(&udc->gadget);
bind_fail:
device_del(&udc->gadget.dev);
add_fail:
stop_activity(udc, driver);
udc_disable(udc);
+ dplus_pullup(udc, 0);
driver->unbind(&udc->gadget);
udc->driver = NULL;
device_del(&udc->gadget.dev);
-
dev_info(udc->dev, "unregistered gadget driver '%s'\n",
driver->driver.name);
+
+ if (udc->transceiver)
+ return otg_set_peripheral(udc->transceiver, NULL);
return 0;
}
EXPORT_SYMBOL(usb_gadget_unregister_driver);
struct pxa27x_request *req = NULL;
int completed = 0;
+ if (!list_empty(&ep->queue))
+ req = list_entry(ep->queue.next, struct pxa27x_request, queue);
+
udccsr0 = udc_ep_readl(ep, UDCCSR);
ep_dbg(ep, "state=%s, req=%p, udccsr0=0x%03x, udcbcr=%d, irq_msk=%x\n",
EP0_STNAME(udc), req, udccsr0, udc_ep_readl(ep, UDCBCR),
(fifo_irq << 1 | opc_irq));
- if (!list_empty(&ep->queue))
- req = list_entry(ep->queue.next, struct pxa27x_request, queue);
-
if (udccsr0 & UDCCSR0_SST) {
ep_dbg(ep, "clearing stall status\n");
nuke(ep, -EPIPE);
.ep0 = &memory.udc_usb_ep[0].usb_ep,
.name = driver_name,
.dev = {
- .bus_id = "gadget",
+ .init_name = "gadget",
},
},
{
struct resource *regs;
struct pxa_udc *udc = &memory;
- int retval;
+ int retval = 0, gpio;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs)
udc->dev = &pdev->dev;
udc->mach = pdev->dev.platform_data;
+ udc->transceiver = otg_get_transceiver();
+
+ gpio = udc->mach->gpio_pullup;
+ if (gpio_is_valid(gpio)) {
+ retval = gpio_request(gpio, "USB D+ pullup");
+ if (retval == 0)
+ gpio_direction_output(gpio,
+ udc->mach->gpio_pullup_inverted);
+ }
+ if (retval) {
+ dev_err(&pdev->dev, "Couldn't request gpio %d : %d\n",
+ gpio, retval);
+ return retval;
+ }
- udc->clk = clk_get(&pdev->dev, "UDCCLK");
+ udc->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(udc->clk)) {
retval = PTR_ERR(udc->clk);
goto err_clk;
device_initialize(&udc->gadget.dev);
udc->gadget.dev.parent = &pdev->dev;
udc->gadget.dev.dma_mask = NULL;
+ udc->vbus_sensed = 0;
the_controller = udc;
platform_set_drvdata(pdev, udc);
static int __exit pxa_udc_remove(struct platform_device *_dev)
{
struct pxa_udc *udc = platform_get_drvdata(_dev);
+ int gpio = udc->mach->gpio_pullup;
usb_gadget_unregister_driver(udc->driver);
free_irq(udc->irq, udc);
pxa_cleanup_debugfs(udc);
+ if (gpio_is_valid(gpio))
+ gpio_free(gpio);
+
+ otg_put_transceiver(udc->transceiver);
+ udc->transceiver = NULL;
platform_set_drvdata(_dev, NULL);
the_controller = NULL;
clk_put(udc->clk);
+ iounmap(udc->regs);
return 0;
}
}
udc_disable(udc);
+ udc->pullup_resume = udc->pullup_on;
+ dplus_pullup(udc, 0);
return 0;
}
ep->udccsr_value, ep->udccr_value);
}
- udc_enable(udc);
+ dplus_pullup(udc, udc->pullup_resume);
+ if (should_enable_udc(udc))
+ udc_enable(udc);
/*
* We do not handle OTG yet.
*
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff