u-boot/drivers/usb/gadget/s3c_udc_otg.c
Lukasz Majewski e0059eaef1 usb:udc:samsung: Zero copy approach for data passed to Samsung's UDC driver
The Samsung's UDC driver is not anymore copying data from USB requests to
aligned internal buffers. Now it works directly in data allocated in the
upper layers like UMS, DFU, THOR.

This change is possible since those gadgets now must take care to allocate
buffers aligned to cache line (CONFIG_SYS_CACHELINE_SIZE).

This can be achieved by using DEFINE_CACHE_ALIGN_BUFFER() or
ALLOC_CACHE_ALIGN_BUFFER() macros. Those take care to allocate buffer
aligned to cache line in both starting address and its size.
Sometimes it is enough to just use memalign() with size being a
multiplication of cache line size.

Test condition
- test HW + measurement: Trats - Exynos4210 rev.1
- test HW Trats2 - Exynos4412 rev.1
400 MiB compressed rootfs image download with `thor 0 mmc 0`

Measurement:
Transmission speed: 27.04 MiB/s

Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Cc: Marek Vasut <marex@denx.de>
2014-02-06 02:22:45 +01:00

890 lines
21 KiB
C

/*
* drivers/usb/gadget/s3c_udc_otg.c
* Samsung S3C on-chip full/high speed USB OTG 2.0 device controllers
*
* Copyright (C) 2008 for Samsung Electronics
*
* BSP Support for Samsung's UDC driver
* available at:
* git://git.kernel.org/pub/scm/linux/kernel/git/kki_ap/linux-2.6-samsung.git
*
* State machine bugfixes:
* Marek Szyprowski <m.szyprowski@samsung.com>
*
* Ported to u-boot:
* Marek Szyprowski <m.szyprowski@samsung.com>
* Lukasz Majewski <l.majewski@samsumg.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#undef DEBUG
#include <common.h>
#include <asm/errno.h>
#include <linux/list.h>
#include <malloc.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
#include <asm/io.h>
#include <asm/mach-types.h>
#include <asm/arch/gpio.h>
#include "regs-otg.h"
#include <usb/lin_gadget_compat.h>
/***********************************************************/
#define OTG_DMA_MODE 1
#define DEBUG_SETUP 0
#define DEBUG_EP0 0
#define DEBUG_ISR 0
#define DEBUG_OUT_EP 0
#define DEBUG_IN_EP 0
#include <usb/s3c_udc.h>
#define EP0_CON 0
#define EP_MASK 0xF
static char *state_names[] = {
"WAIT_FOR_SETUP",
"DATA_STATE_XMIT",
"DATA_STATE_NEED_ZLP",
"WAIT_FOR_OUT_STATUS",
"DATA_STATE_RECV",
"WAIT_FOR_COMPLETE",
"WAIT_FOR_OUT_COMPLETE",
"WAIT_FOR_IN_COMPLETE",
"WAIT_FOR_NULL_COMPLETE",
};
#define DRIVER_DESC "S3C HS USB OTG Device Driver, (c) Samsung Electronics"
#define DRIVER_VERSION "15 March 2009"
struct s3c_udc *the_controller;
static const char driver_name[] = "s3c-udc";
static const char driver_desc[] = DRIVER_DESC;
static const char ep0name[] = "ep0-control";
/* Max packet size*/
static unsigned int ep0_fifo_size = 64;
static unsigned int ep_fifo_size = 512;
static unsigned int ep_fifo_size2 = 1024;
static int reset_available = 1;
static struct usb_ctrlrequest *usb_ctrl;
static dma_addr_t usb_ctrl_dma_addr;
/*
Local declarations.
*/
static int s3c_ep_enable(struct usb_ep *ep,
const struct usb_endpoint_descriptor *);
static int s3c_ep_disable(struct usb_ep *ep);
static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
gfp_t gfp_flags);
static void s3c_free_request(struct usb_ep *ep, struct usb_request *);
static int s3c_queue(struct usb_ep *ep, struct usb_request *, gfp_t gfp_flags);
static int s3c_dequeue(struct usb_ep *ep, struct usb_request *);
static int s3c_fifo_status(struct usb_ep *ep);
static void s3c_fifo_flush(struct usb_ep *ep);
static void s3c_ep0_read(struct s3c_udc *dev);
static void s3c_ep0_kick(struct s3c_udc *dev, struct s3c_ep *ep);
static void s3c_handle_ep0(struct s3c_udc *dev);
static int s3c_ep0_write(struct s3c_udc *dev);
static int write_fifo_ep0(struct s3c_ep *ep, struct s3c_request *req);
static void done(struct s3c_ep *ep, struct s3c_request *req, int status);
static void stop_activity(struct s3c_udc *dev,
struct usb_gadget_driver *driver);
static int udc_enable(struct s3c_udc *dev);
static void udc_set_address(struct s3c_udc *dev, unsigned char address);
static void reconfig_usbd(void);
static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed);
static void nuke(struct s3c_ep *ep, int status);
static int s3c_udc_set_halt(struct usb_ep *_ep, int value);
static void s3c_udc_set_nak(struct s3c_ep *ep);
void set_udc_gadget_private_data(void *p)
{
debug_cond(DEBUG_SETUP != 0,
"%s: the_controller: 0x%p, p: 0x%p\n", __func__,
the_controller, p);
the_controller->gadget.dev.device_data = p;
}
void *get_udc_gadget_private_data(struct usb_gadget *gadget)
{
return gadget->dev.device_data;
}
static struct usb_ep_ops s3c_ep_ops = {
.enable = s3c_ep_enable,
.disable = s3c_ep_disable,
.alloc_request = s3c_alloc_request,
.free_request = s3c_free_request,
.queue = s3c_queue,
.dequeue = s3c_dequeue,
.set_halt = s3c_udc_set_halt,
.fifo_status = s3c_fifo_status,
.fifo_flush = s3c_fifo_flush,
};
#define create_proc_files() do {} while (0)
#define remove_proc_files() do {} while (0)
/***********************************************************/
void __iomem *regs_otg;
struct s3c_usbotg_reg *reg;
struct s3c_usbotg_phy *phy;
static unsigned int usb_phy_ctrl;
void otg_phy_init(struct s3c_udc *dev)
{
dev->pdata->phy_control(1);
/*USB PHY0 Enable */
printf("USB PHY0 Enable\n");
/* Enable PHY */
writel(readl(usb_phy_ctrl) | USB_PHY_CTRL_EN0, usb_phy_ctrl);
if (dev->pdata->usb_flags == PHY0_SLEEP) /* C210 Universal */
writel((readl(&phy->phypwr)
&~(PHY_0_SLEEP | OTG_DISABLE_0 | ANALOG_PWRDOWN)
&~FORCE_SUSPEND_0), &phy->phypwr);
else /* C110 GONI */
writel((readl(&phy->phypwr) &~(OTG_DISABLE_0 | ANALOG_PWRDOWN)
&~FORCE_SUSPEND_0), &phy->phypwr);
if (s5p_cpu_id == 0x4412)
writel((readl(&phy->phyclk) & ~(EXYNOS4X12_ID_PULLUP0 |
EXYNOS4X12_COMMON_ON_N0)) | EXYNOS4X12_CLK_SEL_24MHZ,
&phy->phyclk); /* PLL 24Mhz */
else
writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)) |
CLK_SEL_24MHZ, &phy->phyclk); /* PLL 24Mhz */
writel((readl(&phy->rstcon) &~(LINK_SW_RST | PHYLNK_SW_RST))
| PHY_SW_RST0, &phy->rstcon);
udelay(10);
writel(readl(&phy->rstcon)
&~(PHY_SW_RST0 | LINK_SW_RST | PHYLNK_SW_RST), &phy->rstcon);
udelay(10);
}
void otg_phy_off(struct s3c_udc *dev)
{
/* reset controller just in case */
writel(PHY_SW_RST0, &phy->rstcon);
udelay(20);
writel(readl(&phy->phypwr) &~PHY_SW_RST0, &phy->rstcon);
udelay(20);
writel(readl(&phy->phypwr) | OTG_DISABLE_0 | ANALOG_PWRDOWN
| FORCE_SUSPEND_0, &phy->phypwr);
writel(readl(usb_phy_ctrl) &~USB_PHY_CTRL_EN0, usb_phy_ctrl);
writel((readl(&phy->phyclk) & ~(ID_PULLUP0 | COMMON_ON_N0)),
&phy->phyclk);
udelay(10000);
dev->pdata->phy_control(0);
}
/***********************************************************/
#include "s3c_udc_otg_xfer_dma.c"
/*
* udc_disable - disable USB device controller
*/
static void udc_disable(struct s3c_udc *dev)
{
debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
udc_set_address(dev, 0);
dev->ep0state = WAIT_FOR_SETUP;
dev->gadget.speed = USB_SPEED_UNKNOWN;
dev->usb_address = 0;
otg_phy_off(dev);
}
/*
* udc_reinit - initialize software state
*/
static void udc_reinit(struct s3c_udc *dev)
{
unsigned int i;
debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
/* device/ep0 records init */
INIT_LIST_HEAD(&dev->gadget.ep_list);
INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
dev->ep0state = WAIT_FOR_SETUP;
/* basic endpoint records init */
for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
struct s3c_ep *ep = &dev->ep[i];
if (i != 0)
list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
ep->desc = 0;
ep->stopped = 0;
INIT_LIST_HEAD(&ep->queue);
ep->pio_irqs = 0;
}
/* the rest was statically initialized, and is read-only */
}
#define BYTES2MAXP(x) (x / 8)
#define MAXP2BYTES(x) (x * 8)
/* until it's enabled, this UDC should be completely invisible
* to any USB host.
*/
static int udc_enable(struct s3c_udc *dev)
{
debug_cond(DEBUG_SETUP != 0, "%s: %p\n", __func__, dev);
otg_phy_init(dev);
reconfig_usbd();
debug_cond(DEBUG_SETUP != 0,
"S3C USB 2.0 OTG Controller Core Initialized : 0x%x\n",
readl(&reg->gintmsk));
dev->gadget.speed = USB_SPEED_UNKNOWN;
return 0;
}
/*
Register entry point for the peripheral controller driver.
*/
int usb_gadget_register_driver(struct usb_gadget_driver *driver)
{
struct s3c_udc *dev = the_controller;
int retval = 0;
unsigned long flags;
debug_cond(DEBUG_SETUP != 0, "%s: %s\n", __func__, "no name");
if (!driver
|| (driver->speed != USB_SPEED_FULL
&& driver->speed != USB_SPEED_HIGH)
|| !driver->bind || !driver->disconnect || !driver->setup)
return -EINVAL;
if (!dev)
return -ENODEV;
if (dev->driver)
return -EBUSY;
spin_lock_irqsave(&dev->lock, flags);
/* first hook up the driver ... */
dev->driver = driver;
spin_unlock_irqrestore(&dev->lock, flags);
if (retval) { /* TODO */
printf("target device_add failed, error %d\n", retval);
return retval;
}
retval = driver->bind(&dev->gadget);
if (retval) {
debug_cond(DEBUG_SETUP != 0,
"%s: bind to driver --> error %d\n",
dev->gadget.name, retval);
dev->driver = 0;
return retval;
}
enable_irq(IRQ_OTG);
debug_cond(DEBUG_SETUP != 0,
"Registered gadget driver %s\n", dev->gadget.name);
udc_enable(dev);
return 0;
}
/*
* Unregister entry point for the peripheral controller driver.
*/
int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
{
struct s3c_udc *dev = the_controller;
unsigned long flags;
if (!dev)
return -ENODEV;
if (!driver || driver != dev->driver)
return -EINVAL;
spin_lock_irqsave(&dev->lock, flags);
dev->driver = 0;
stop_activity(dev, driver);
spin_unlock_irqrestore(&dev->lock, flags);
driver->unbind(&dev->gadget);
disable_irq(IRQ_OTG);
udc_disable(dev);
return 0;
}
/*
* done - retire a request; caller blocked irqs
*/
static void done(struct s3c_ep *ep, struct s3c_request *req, int status)
{
unsigned int stopped = ep->stopped;
debug("%s: %s %p, req = %p, stopped = %d\n",
__func__, ep->ep.name, ep, &req->req, stopped);
list_del_init(&req->queue);
if (likely(req->req.status == -EINPROGRESS))
req->req.status = status;
else
status = req->req.status;
if (status && status != -ESHUTDOWN) {
debug("complete %s req %p stat %d len %u/%u\n",
ep->ep.name, &req->req, status,
req->req.actual, req->req.length);
}
/* don't modify queue heads during completion callback */
ep->stopped = 1;
#ifdef DEBUG
printf("calling complete callback\n");
{
int i, len = req->req.length;
printf("pkt[%d] = ", req->req.length);
if (len > 64)
len = 64;
for (i = 0; i < len; i++) {
printf("%02x", ((u8 *)req->req.buf)[i]);
if ((i & 7) == 7)
printf(" ");
}
printf("\n");
}
#endif
spin_unlock(&ep->dev->lock);
req->req.complete(&ep->ep, &req->req);
spin_lock(&ep->dev->lock);
debug("callback completed\n");
ep->stopped = stopped;
}
/*
* nuke - dequeue ALL requests
*/
static void nuke(struct s3c_ep *ep, int status)
{
struct s3c_request *req;
debug("%s: %s %p\n", __func__, ep->ep.name, ep);
/* called with irqs blocked */
while (!list_empty(&ep->queue)) {
req = list_entry(ep->queue.next, struct s3c_request, queue);
done(ep, req, status);
}
}
static void stop_activity(struct s3c_udc *dev,
struct usb_gadget_driver *driver)
{
int i;
/* don't disconnect drivers more than once */
if (dev->gadget.speed == USB_SPEED_UNKNOWN)
driver = 0;
dev->gadget.speed = USB_SPEED_UNKNOWN;
/* prevent new request submissions, kill any outstanding requests */
for (i = 0; i < S3C_MAX_ENDPOINTS; i++) {
struct s3c_ep *ep = &dev->ep[i];
ep->stopped = 1;
nuke(ep, -ESHUTDOWN);
}
/* report disconnect; the driver is already quiesced */
if (driver) {
spin_unlock(&dev->lock);
driver->disconnect(&dev->gadget);
spin_lock(&dev->lock);
}
/* re-init driver-visible data structures */
udc_reinit(dev);
}
static void reconfig_usbd(void)
{
/* 2. Soft-reset OTG Core and then unreset again. */
int i;
unsigned int uTemp = writel(CORE_SOFT_RESET, &reg->grstctl);
debug("Reseting OTG controller\n");
writel(0<<15 /* PHY Low Power Clock sel*/
|1<<14 /* Non-Periodic TxFIFO Rewind Enable*/
|0x5<<10 /* Turnaround time*/
|0<<9 | 0<<8 /* [0:HNP disable,1:HNP enable][ 0:SRP disable*/
/* 1:SRP enable] H1= 1,1*/
|0<<7 /* Ulpi DDR sel*/
|0<<6 /* 0: high speed utmi+, 1: full speed serial*/
|0<<4 /* 0: utmi+, 1:ulpi*/
|1<<3 /* phy i/f 0:8bit, 1:16bit*/
|0x7<<0, /* HS/FS Timeout**/
&reg->gusbcfg);
/* 3. Put the OTG device core in the disconnected state.*/
uTemp = readl(&reg->dctl);
uTemp |= SOFT_DISCONNECT;
writel(uTemp, &reg->dctl);
udelay(20);
/* 4. Make the OTG device core exit from the disconnected state.*/
uTemp = readl(&reg->dctl);
uTemp = uTemp & ~SOFT_DISCONNECT;
writel(uTemp, &reg->dctl);
/* 5. Configure OTG Core to initial settings of device mode.*/
/* [][1: full speed(30Mhz) 0:high speed]*/
writel(EP_MISS_CNT(1) | DEV_SPEED_HIGH_SPEED_20, &reg->dcfg);
mdelay(1);
/* 6. Unmask the core interrupts*/
writel(GINTMSK_INIT, &reg->gintmsk);
/* 7. Set NAK bit of EP0, EP1, EP2*/
writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[EP0_CON].doepctl);
writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[EP0_CON].diepctl);
for (i = 1; i < S3C_MAX_ENDPOINTS; i++) {
writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->out_endp[i].doepctl);
writel(DEPCTL_EPDIS|DEPCTL_SNAK, &reg->in_endp[i].diepctl);
}
/* 8. Unmask EPO interrupts*/
writel(((1 << EP0_CON) << DAINT_OUT_BIT)
| (1 << EP0_CON), &reg->daintmsk);
/* 9. Unmask device OUT EP common interrupts*/
writel(DOEPMSK_INIT, &reg->doepmsk);
/* 10. Unmask device IN EP common interrupts*/
writel(DIEPMSK_INIT, &reg->diepmsk);
/* 11. Set Rx FIFO Size (in 32-bit words) */
writel(RX_FIFO_SIZE >> 2, &reg->grxfsiz);
/* 12. Set Non Periodic Tx FIFO Size */
writel((NPTX_FIFO_SIZE >> 2) << 16 | ((RX_FIFO_SIZE >> 2)) << 0,
&reg->gnptxfsiz);
for (i = 1; i < S3C_MAX_HW_ENDPOINTS; i++)
writel((PTX_FIFO_SIZE >> 2) << 16 |
((RX_FIFO_SIZE + NPTX_FIFO_SIZE +
PTX_FIFO_SIZE*(i-1)) >> 2) << 0,
&reg->dieptxf[i-1]);
/* Flush the RX FIFO */
writel(RX_FIFO_FLUSH, &reg->grstctl);
while (readl(&reg->grstctl) & RX_FIFO_FLUSH)
debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
/* Flush all the Tx FIFO's */
writel(TX_FIFO_FLUSH_ALL, &reg->grstctl);
writel(TX_FIFO_FLUSH_ALL | TX_FIFO_FLUSH, &reg->grstctl);
while (readl(&reg->grstctl) & TX_FIFO_FLUSH)
debug("%s: waiting for S3C_UDC_OTG_GRSTCTL\n", __func__);
/* 13. Clear NAK bit of EP0, EP1, EP2*/
/* For Slave mode*/
/* EP0: Control OUT */
writel(DEPCTL_EPDIS | DEPCTL_CNAK,
&reg->out_endp[EP0_CON].doepctl);
/* 14. Initialize OTG Link Core.*/
writel(GAHBCFG_INIT, &reg->gahbcfg);
}
static void set_max_pktsize(struct s3c_udc *dev, enum usb_device_speed speed)
{
unsigned int ep_ctrl;
int i;
if (speed == USB_SPEED_HIGH) {
ep0_fifo_size = 64;
ep_fifo_size = 512;
ep_fifo_size2 = 1024;
dev->gadget.speed = USB_SPEED_HIGH;
} else {
ep0_fifo_size = 64;
ep_fifo_size = 64;
ep_fifo_size2 = 64;
dev->gadget.speed = USB_SPEED_FULL;
}
dev->ep[0].ep.maxpacket = ep0_fifo_size;
for (i = 1; i < S3C_MAX_ENDPOINTS; i++)
dev->ep[i].ep.maxpacket = ep_fifo_size;
/* EP0 - Control IN (64 bytes)*/
ep_ctrl = readl(&reg->in_endp[EP0_CON].diepctl);
writel(ep_ctrl|(0<<0), &reg->in_endp[EP0_CON].diepctl);
/* EP0 - Control OUT (64 bytes)*/
ep_ctrl = readl(&reg->out_endp[EP0_CON].doepctl);
writel(ep_ctrl|(0<<0), &reg->out_endp[EP0_CON].doepctl);
}
static int s3c_ep_enable(struct usb_ep *_ep,
const struct usb_endpoint_descriptor *desc)
{
struct s3c_ep *ep;
struct s3c_udc *dev;
unsigned long flags;
debug("%s: %p\n", __func__, _ep);
ep = container_of(_ep, struct s3c_ep, ep);
if (!_ep || !desc || ep->desc || _ep->name == ep0name
|| desc->bDescriptorType != USB_DT_ENDPOINT
|| ep->bEndpointAddress != desc->bEndpointAddress
|| ep_maxpacket(ep) <
le16_to_cpu(get_unaligned(&desc->wMaxPacketSize))) {
debug("%s: bad ep or descriptor\n", __func__);
return -EINVAL;
}
/* xfer types must match, except that interrupt ~= bulk */
if (ep->bmAttributes != desc->bmAttributes
&& ep->bmAttributes != USB_ENDPOINT_XFER_BULK
&& desc->bmAttributes != USB_ENDPOINT_XFER_INT) {
debug("%s: %s type mismatch\n", __func__, _ep->name);
return -EINVAL;
}
/* hardware _could_ do smaller, but driver doesn't */
if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
&& le16_to_cpu(get_unaligned(&desc->wMaxPacketSize)) !=
ep_maxpacket(ep)) || !get_unaligned(&desc->wMaxPacketSize)) {
debug("%s: bad %s maxpacket\n", __func__, _ep->name);
return -ERANGE;
}
dev = ep->dev;
if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
debug("%s: bogus device state\n", __func__);
return -ESHUTDOWN;
}
ep->stopped = 0;
ep->desc = desc;
ep->pio_irqs = 0;
ep->ep.maxpacket = le16_to_cpu(get_unaligned(&desc->wMaxPacketSize));
/* Reset halt state */
s3c_udc_set_nak(ep);
s3c_udc_set_halt(_ep, 0);
spin_lock_irqsave(&ep->dev->lock, flags);
s3c_udc_ep_activate(ep);
spin_unlock_irqrestore(&ep->dev->lock, flags);
debug("%s: enabled %s, stopped = %d, maxpacket = %d\n",
__func__, _ep->name, ep->stopped, ep->ep.maxpacket);
return 0;
}
/*
* Disable EP
*/
static int s3c_ep_disable(struct usb_ep *_ep)
{
struct s3c_ep *ep;
unsigned long flags;
debug("%s: %p\n", __func__, _ep);
ep = container_of(_ep, struct s3c_ep, ep);
if (!_ep || !ep->desc) {
debug("%s: %s not enabled\n", __func__,
_ep ? ep->ep.name : NULL);
return -EINVAL;
}
spin_lock_irqsave(&ep->dev->lock, flags);
/* Nuke all pending requests */
nuke(ep, -ESHUTDOWN);
ep->desc = 0;
ep->stopped = 1;
spin_unlock_irqrestore(&ep->dev->lock, flags);
debug("%s: disabled %s\n", __func__, _ep->name);
return 0;
}
static struct usb_request *s3c_alloc_request(struct usb_ep *ep,
gfp_t gfp_flags)
{
struct s3c_request *req;
debug("%s: %s %p\n", __func__, ep->name, ep);
req = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*req));
if (!req)
return 0;
memset(req, 0, sizeof *req);
INIT_LIST_HEAD(&req->queue);
return &req->req;
}
static void s3c_free_request(struct usb_ep *ep, struct usb_request *_req)
{
struct s3c_request *req;
debug("%s: %p\n", __func__, ep);
req = container_of(_req, struct s3c_request, req);
WARN_ON(!list_empty(&req->queue));
kfree(req);
}
/* dequeue JUST ONE request */
static int s3c_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct s3c_ep *ep;
struct s3c_request *req;
unsigned long flags;
debug("%s: %p\n", __func__, _ep);
ep = container_of(_ep, struct s3c_ep, ep);
if (!_ep || ep->ep.name == ep0name)
return -EINVAL;
spin_lock_irqsave(&ep->dev->lock, flags);
/* make sure it's actually queued on this endpoint */
list_for_each_entry(req, &ep->queue, queue) {
if (&req->req == _req)
break;
}
if (&req->req != _req) {
spin_unlock_irqrestore(&ep->dev->lock, flags);
return -EINVAL;
}
done(ep, req, -ECONNRESET);
spin_unlock_irqrestore(&ep->dev->lock, flags);
return 0;
}
/*
* Return bytes in EP FIFO
*/
static int s3c_fifo_status(struct usb_ep *_ep)
{
int count = 0;
struct s3c_ep *ep;
ep = container_of(_ep, struct s3c_ep, ep);
if (!_ep) {
debug("%s: bad ep\n", __func__);
return -ENODEV;
}
debug("%s: %d\n", __func__, ep_index(ep));
/* LPD can't report unclaimed bytes from IN fifos */
if (ep_is_in(ep))
return -EOPNOTSUPP;
return count;
}
/*
* Flush EP FIFO
*/
static void s3c_fifo_flush(struct usb_ep *_ep)
{
struct s3c_ep *ep;
ep = container_of(_ep, struct s3c_ep, ep);
if (unlikely(!_ep || (!ep->desc && ep->ep.name != ep0name))) {
debug("%s: bad ep\n", __func__);
return;
}
debug("%s: %d\n", __func__, ep_index(ep));
}
static const struct usb_gadget_ops s3c_udc_ops = {
/* current versions must always be self-powered */
};
static struct s3c_udc memory = {
.usb_address = 0,
.gadget = {
.ops = &s3c_udc_ops,
.ep0 = &memory.ep[0].ep,
.name = driver_name,
},
/* control endpoint */
.ep[0] = {
.ep = {
.name = ep0name,
.ops = &s3c_ep_ops,
.maxpacket = EP0_FIFO_SIZE,
},
.dev = &memory,
.bEndpointAddress = 0,
.bmAttributes = 0,
.ep_type = ep_control,
},
/* first group of endpoints */
.ep[1] = {
.ep = {
.name = "ep1in-bulk",
.ops = &s3c_ep_ops,
.maxpacket = EP_FIFO_SIZE,
},
.dev = &memory,
.bEndpointAddress = USB_DIR_IN | 1,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.ep_type = ep_bulk_out,
.fifo_num = 1,
},
.ep[2] = {
.ep = {
.name = "ep2out-bulk",
.ops = &s3c_ep_ops,
.maxpacket = EP_FIFO_SIZE,
},
.dev = &memory,
.bEndpointAddress = USB_DIR_OUT | 2,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.ep_type = ep_bulk_in,
.fifo_num = 2,
},
.ep[3] = {
.ep = {
.name = "ep3in-int",
.ops = &s3c_ep_ops,
.maxpacket = EP_FIFO_SIZE,
},
.dev = &memory,
.bEndpointAddress = USB_DIR_IN | 3,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.ep_type = ep_interrupt,
.fifo_num = 3,
},
};
/*
* probe - binds to the platform device
*/
int s3c_udc_probe(struct s3c_plat_otg_data *pdata)
{
struct s3c_udc *dev = &memory;
int retval = 0;
debug("%s: %p\n", __func__, pdata);
dev->pdata = pdata;
phy = (struct s3c_usbotg_phy *)pdata->regs_phy;
reg = (struct s3c_usbotg_reg *)pdata->regs_otg;
usb_phy_ctrl = pdata->usb_phy_ctrl;
/* regs_otg = (void *)pdata->regs_otg; */
dev->gadget.is_dualspeed = 1; /* Hack only*/
dev->gadget.is_otg = 0;
dev->gadget.is_a_peripheral = 0;
dev->gadget.b_hnp_enable = 0;
dev->gadget.a_hnp_support = 0;
dev->gadget.a_alt_hnp_support = 0;
the_controller = dev;
usb_ctrl = memalign(CONFIG_SYS_CACHELINE_SIZE,
ROUND(sizeof(struct usb_ctrlrequest),
CONFIG_SYS_CACHELINE_SIZE));
if (!usb_ctrl) {
error("No memory available for UDC!\n");
return -ENOMEM;
}
usb_ctrl_dma_addr = (dma_addr_t) usb_ctrl;
udc_reinit(dev);
return retval;
}
int usb_gadget_handle_interrupts()
{
u32 intr_status = readl(&reg->gintsts);
u32 gintmsk = readl(&reg->gintmsk);
if (intr_status & gintmsk)
return s3c_udc_irq(1, (void *)the_controller);
return 0;
}