*
* CODE STATUS HIGHLIGHTS
*
- * Used with a gadget driver like "zero.c" this enumerates fine to Windows
- * or Linux hosts; handles disconnect, reconnect, and reset, for full or
- * high speed operation; and passes USB-IF "chapter 9" tests.
- *
- * Handles standard stress loads from the Linux "usbtest" driver, with
- * either DMA (default) or PIO (use_dma=n) used for ep-{a,b,c,d}. Testing
- * with "ttcp" (and the "ether.c" driver) behaves nicely too.
+ * This driver should work well with most "gadget" drivers, including
+ * the File Storage, Serial, and Ethernet/RNDIS gadget drivers
+ * as well as Gadget Zero and Gadgetfs.
*
* DMA is enabled by default. Drivers using transfer queues might use
* DMA chaining to remove IRQ latencies between transfers. (Except when
return 0;
}
-static int handshake (u32 *ptr, u32 mask, u32 done, int usec)
+static int handshake (u32 __iomem *ptr, u32 mask, u32 done, int usec)
{
u32 result;
static struct usb_ep_ops net2280_ep_ops;
-static void ep_reset (struct net2280_regs *regs, struct net2280_ep *ep)
+static void ep_reset (struct net2280_regs __iomem *regs, struct net2280_ep *ep)
{
u32 tmp;
/* init to our chosen defaults, notably so that we NAK OUT
* packets until the driver queues a read (+note erratum 0112)
*/
- writel ( (1 << SET_NAK_OUT_PACKETS_MODE)
+ tmp = (1 << SET_NAK_OUT_PACKETS_MODE)
| (1 << SET_NAK_OUT_PACKETS)
| (1 << CLEAR_EP_HIDE_STATUS_PHASE)
- | (1 << CLEAR_INTERRUPT_MODE)
- | (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)
- | (1 << CLEAR_ENDPOINT_TOGGLE)
- | (1 << CLEAR_ENDPOINT_HALT)
- , &ep->regs->ep_rsp);
+ | (1 << CLEAR_INTERRUPT_MODE);
+
+ if (ep->num != 0) {
+ tmp |= (1 << CLEAR_ENDPOINT_TOGGLE)
+ | (1 << CLEAR_ENDPOINT_HALT);
+ }
+ writel (tmp, &ep->regs->ep_rsp);
/* scrub most status bits, and flush any fifo state */
writel ( (1 << TIMEOUT)
static void
write_fifo (struct net2280_ep *ep, struct usb_request *req)
{
- struct net2280_ep_regs *regs = ep->regs;
+ struct net2280_ep_regs __iomem *regs = ep->regs;
u8 *buf;
u32 tmp;
unsigned count, total;
*/
static void out_flush (struct net2280_ep *ep)
{
- u32 *statp, tmp;
+ u32 __iomem *statp;
+ u32 tmp;
ASSERT_OUT_NAKING (ep);
static int
read_fifo (struct net2280_ep *ep, struct net2280_request *req)
{
- struct net2280_ep_regs *regs = ep->regs;
+ struct net2280_ep_regs __iomem *regs = ep->regs;
u8 *buf = req->req.buf + req->req.actual;
unsigned count, tmp, is_short;
unsigned cleanup = 0, prevent = 0;
}
if (count) {
tmp = readl (®s->ep_data);
- cpu_to_le32s (&tmp);
+ /* LE conversion is implicit here: */
do {
*buf++ = (u8) tmp;
tmp >>= 8;
/* erratum 0116 workaround part 2 (no AUTOSTART) */
| (1 << DMA_ENABLE);
-static inline void spin_stop_dma (struct net2280_dma_regs *dma)
+static inline void spin_stop_dma (struct net2280_dma_regs __iomem *dma)
{
handshake (&dma->dmactl, (1 << DMA_ENABLE), 0, 50);
}
-static inline void stop_dma (struct net2280_dma_regs *dma)
+static inline void stop_dma (struct net2280_dma_regs __iomem *dma)
{
writel (readl (&dma->dmactl) & ~(1 << DMA_ENABLE), &dma->dmactl);
spin_stop_dma (dma);
static void start_queue (struct net2280_ep *ep, u32 dmactl, u32 td_dma)
{
- struct net2280_dma_regs *dma = ep->dma;
+ struct net2280_dma_regs __iomem *dma = ep->dma;
writel ((1 << VALID_BIT) | (ep->is_in << DMA_DIRECTION),
&dma->dmacount);
static void start_dma (struct net2280_ep *ep, struct net2280_request *req)
{
u32 tmp;
- struct net2280_dma_regs *dma = ep->dma;
+ struct net2280_dma_regs __iomem *dma = ep->dma;
/* FIXME can't use DMA for ZLPs */
return 0;
}
+static int net2280_pullup(struct usb_gadget *_gadget, int is_on)
+{
+ struct net2280 *dev;
+ u32 tmp;
+ unsigned long flags;
+
+ if (!_gadget)
+ return -ENODEV;
+ dev = container_of (_gadget, struct net2280, gadget);
+
+ spin_lock_irqsave (&dev->lock, flags);
+ tmp = readl (&dev->usb->usbctl);
+ dev->softconnect = (is_on != 0);
+ if (is_on)
+ tmp |= (1 << USB_DETECT_ENABLE);
+ else
+ tmp &= ~(1 << USB_DETECT_ENABLE);
+ writel (tmp, &dev->usb->usbctl);
+ spin_unlock_irqrestore (&dev->lock, flags);
+
+ return 0;
+}
+
static const struct usb_gadget_ops net2280_ops = {
.get_frame = net2280_get_frame,
.wakeup = net2280_wakeup,
.set_selfpowered = net2280_set_selfpowered,
+ .pullup = net2280_pullup,
};
/*-------------------------------------------------------------------------*/
{
u32 tmp;
- /* force immediate bus disconnect, and synch through pci */
- writel (0, &dev->usb->usbctl);
dev->gadget.speed = USB_SPEED_UNKNOWN;
(void) readl (&dev->usb->usbctl);
, &dev->usb->stdrsp);
writel ( (1 << USB_ROOT_PORT_WAKEUP_ENABLE)
| (1 << SELF_POWERED_USB_DEVICE)
- /* erratum 0102 workaround */
- | ((dev->chiprev == 0100) ? 0 : 1) << SUSPEND_IMMEDIATELY
| (1 << REMOTE_WAKEUP_SUPPORT)
- | (1 << USB_DETECT_ENABLE)
+ | (dev->softconnect << USB_DETECT_ENABLE)
| (1 << SELF_POWERED_STATUS)
, &dev->usb->usbctl);
dev->ep [i].irqs = 0;
/* hook up the driver ... */
+ dev->softconnect = 1;
driver->driver.bus = NULL;
dev->driver = driver;
dev->gadget.dev.driver = &driver->driver;
stop_activity (dev, driver);
spin_unlock_irqrestore (&dev->lock, flags);
+ net2280_pullup (&dev->gadget, 0);
+
driver->unbind (&dev->gadget);
dev->gadget.dev.driver = NULL;
dev->driver = NULL;
static void handle_stat1_irqs (struct net2280 *dev, u32 stat)
{
struct net2280_ep *ep;
- u32 tmp, num, scratch;
+ u32 tmp, num, mask, scratch;
/* after disconnect there's nothing else to do! */
tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT);
+ mask = (1 << HIGH_SPEED) | (1 << FULL_SPEED);
+
+ /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set.
+ * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRRUPT set and
+ * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT
+ * only indicates a change in the reset state).
+ */
if (stat & tmp) {
writel (tmp, &dev->regs->irqstat1);
- if (((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) != 0
- || (readl (&dev->usb->usbctl) & (1 << VBUS_PIN)) == 0
- ) && dev->gadget.speed != USB_SPEED_UNKNOWN) {
+ if ((((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) &&
+ ((readl (&dev->usb->usbstat) & mask) == 0))
+ || ((readl (&dev->usb->usbctl) & (1 << VBUS_PIN)) == 0)
+ ) && ( dev->gadget.speed != USB_SPEED_UNKNOWN)) {
DEBUG (dev, "disconnect %s\n",
dev->driver->driver.name);
stop_activity (dev, dev->driver);
if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) {
if (dev->driver->suspend)
dev->driver->suspend (&dev->gadget);
- /* we use SUSPEND_IMMEDIATELY */
- stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT);
} else {
if (dev->driver->resume)
dev->driver->resume (&dev->gadget);
stat &= ~DMA_INTERRUPTS;
scratch >>= 9;
for (num = 0; scratch; num++) {
- struct net2280_dma_regs *dma;
+ struct net2280_dma_regs __iomem *dma;
tmp = 1 << num;
if ((tmp & scratch) == 0)
{
struct net2280 *dev;
unsigned long resource, len;
- void *base = NULL;
+ void __iomem *base = NULL;
int retval, i;
char buf [8], *bufp;
retval = -EFAULT;
goto done;
}
- dev->regs = (struct net2280_regs *) base;
- dev->usb = (struct net2280_usb_regs *) (base + 0x0080);
- dev->pci = (struct net2280_pci_regs *) (base + 0x0100);
- dev->dma = (struct net2280_dma_regs *) (base + 0x0180);
- dev->dep = (struct net2280_dep_regs *) (base + 0x0200);
- dev->epregs = (struct net2280_ep_regs *) (base + 0x0300);
+ dev->regs = (struct net2280_regs __iomem *) base;
+ dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080);
+ dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100);
+ dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180);
+ dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200);
+ dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300);
/* put into initial config, link up all endpoints */
+ writel (0, &dev->usb->usbctl);
usb_reset (dev);
usb_reinit (dev);
git://git.onelab.eu / linux-2.6.git / blobdiff