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atmel_usba_udc: Add support for AT91CAP9 UDPHS

소스 검색 
This patch is part of the series adding support for the USB High
Speed Device Port on the AT91CAP9 system on chip. The AT91CAP9
uses the same UDPHS IP as the AVR32 and the AT91SAM9RL.

The only differences between the AVR32 and the AT91 version of the
device are in the enable/disable and suspend/wakeup sequences: the
AT91 version needs to toggle the USB bias and pulldown explicitly.

Signed-off-by: Stelian Pop <stelian@popies.net>
Acked-by: Andrew Victor <linux@maxim.org.za>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
This commit is contained in:
Stelian Pop
2008-04-05 22:25:47 +02:00
committed by Haavard Skinnemoen
부모 5275653fa1
커밋 16a45bc82e
3개의 변경된 파일과 46개의 추가작업 그리고 8개의 파일을 삭제
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41
drivers/usb/gadget/atmel_usba_udc.c
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@@ -326,6 +326,28 @@ static int vbus_is_present(struct usba_udc *udc)
return 1;
}
#if defined(CONFIG_AVR32)
static void toggle_bias(int is_on)
{
}
#elif defined(CONFIG_ARCH_AT91)
#include <asm/arch/at91_pmc.h>
static void toggle_bias(int is_on)
{
unsigned int uckr = at91_sys_read(AT91_CKGR_UCKR);
if (is_on)
at91_sys_write(AT91_CKGR_UCKR, uckr | AT91_PMC_BIASEN);
else
at91_sys_write(AT91_CKGR_UCKR, uckr & ~(AT91_PMC_BIASEN));
}
#endif /* CONFIG_ARCH_AT91 */
static void next_fifo_transaction(struct usba_ep *ep, struct usba_request *req)
{
unsigned int transaction_len;
@@ -1457,7 +1479,7 @@ restart:
DBG(DBG_HW, "Packet length: %u\n", pkt_len);
if (pkt_len != sizeof(crq)) {
pr_warning("udc: Invalid packet length %u "
"(expected %lu)\n", pkt_len, sizeof(crq));
"(expected %zu)\n", pkt_len, sizeof(crq));
set_protocol_stall(udc, ep);
return;
}
@@ -1615,6 +1637,7 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
DBG(DBG_INT, "irq, status=%#08x\n", status);
if (status & USBA_DET_SUSPEND) {
toggle_bias(0);
usba_writel(udc, INT_CLR, USBA_DET_SUSPEND);
DBG(DBG_BUS, "Suspend detected\n");
if (udc->gadget.speed != USB_SPEED_UNKNOWN
@@ -1626,6 +1649,7 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
}
if (status & USBA_WAKE_UP) {
toggle_bias(1);
usba_writel(udc, INT_CLR, USBA_WAKE_UP);
DBG(DBG_BUS, "Wake Up CPU detected\n");
}
@@ -1719,12 +1743,14 @@ static irqreturn_t usba_vbus_irq(int irq, void *devid)
vbus = gpio_get_value(udc->vbus_pin);
if (vbus != udc->vbus_prev) {
if (vbus) {
usba_writel(udc, CTRL, USBA_EN_USBA);
toggle_bias(1);
usba_writel(udc, CTRL, USBA_ENABLE_MASK);
usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
} else {
udc->gadget.speed = USB_SPEED_UNKNOWN;
reset_all_endpoints(udc);
usba_writel(udc, CTRL, 0);
toggle_bias(0);
usba_writel(udc, CTRL, USBA_DISABLE_MASK);
spin_unlock(&udc->lock);
udc->driver->disconnect(&udc->gadget);
spin_lock(&udc->lock);
@@ -1777,7 +1803,8 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
/* If Vbus is present, enable the controller and wait for reset */
spin_lock_irqsave(&udc->lock, flags);
if (vbus_is_present(udc) && udc->vbus_prev == 0) {
usba_writel(udc, CTRL, USBA_EN_USBA);
toggle_bias(1);
usba_writel(udc, CTRL, USBA_ENABLE_MASK);
usba_writel(udc, INT_ENB, USBA_END_OF_RESET);
}
spin_unlock_irqrestore(&udc->lock, flags);
@@ -1810,7 +1837,8 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
spin_unlock_irqrestore(&udc->lock, flags);
/* This will also disable the DP pullup */
usba_writel(udc, CTRL, 0);
toggle_bias(0);
usba_writel(udc, CTRL, USBA_DISABLE_MASK);
driver->unbind(&udc->gadget);
udc->gadget.dev.driver = NULL;
@@ -1880,7 +1908,8 @@ static int __init usba_udc_probe(struct platform_device *pdev)
/* Make sure we start from a clean slate */
clk_enable(pclk);
usba_writel(udc, CTRL, 0);
toggle_bias(0);
usba_writel(udc, CTRL, USBA_DISABLE_MASK);
clk_disable(pclk);
usba_ep = kmalloc(sizeof(struct usba_ep) * pdata->num_ep,