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/*
* linux/drivers/usb/gadget/jz4740_udc.c
*
* Ingenic JZ4740 on-chip high speed USB device controller
*
* Copyright (C) 2006 - 2008 Ingenic Semiconductor Inc.
* Author: <jlwei@ingenic.cn>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
/*
* This device has ep0, two bulk-in/interrupt-in endpoints, and one bulk-out endpoint.
*
* - Endpoint numbering is fixed: ep0, ep1in-int, ep2in-bulk, ep1out-bulk.
* - DMA works with bulk-in (channel 1) and bulk-out (channel 2) endpoints.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/proc_fs.h>
#include <linux/usb.h>
#include <linux/usb/gadget.h>
#include <linux/clk.h>
#include <asm/byteorder.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/mach-jz4740/clock.h>
#include "jz4740_udc.h"
#define JZ_REG_UDC_FADDR 0x00 /* Function Address 8-bit */
#define JZ_REG_UDC_POWER 0x01 /* Power Management 8-bit */
#define JZ_REG_UDC_INTRIN 0x02 /* Interrupt IN 16-bit */
#define JZ_REG_UDC_INTROUT 0x04 /* Interrupt OUT 16-bit */
#define JZ_REG_UDC_INTRINE 0x06 /* Intr IN enable 16-bit */
#define JZ_REG_UDC_INTROUTE 0x08 /* Intr OUT enable 16-bit */
#define JZ_REG_UDC_INTRUSB 0x0a /* Interrupt USB 8-bit */
#define JZ_REG_UDC_INTRUSBE 0x0b /* Interrupt USB Enable 8-bit */
#define JZ_REG_UDC_FRAME 0x0c /* Frame number 16-bit */
#define JZ_REG_UDC_INDEX 0x0e /* Index register 8-bit */
#define JZ_REG_UDC_TESTMODE 0x0f /* USB test mode 8-bit */
#define JZ_REG_UDC_CSR0 0x12 /* EP0 CSR 8-bit */
#define JZ_REG_UDC_INMAXP 0x10 /* EP1-2 IN Max Pkt Size 16-bit */
#define JZ_REG_UDC_INCSR 0x12 /* EP1-2 IN CSR LSB 8/16bit */
#define JZ_REG_UDC_INCSRH 0x13 /* EP1-2 IN CSR MSB 8-bit */
#define JZ_REG_UDC_OUTMAXP 0x14 /* EP1 OUT Max Pkt Size 16-bit */
#define JZ_REG_UDC_OUTCSR 0x16 /* EP1 OUT CSR LSB 8/16bit */
#define JZ_REG_UDC_OUTCSRH 0x17 /* EP1 OUT CSR MSB 8-bit */
#define JZ_REG_UDC_OUTCOUNT 0x18 /* bytes in EP0/1 OUT FIFO 16-bit */
#define JZ_REG_UDC_EP_FIFO(x) (4 * (x) + 0x20)
#define JZ_REG_UDC_EPINFO 0x78 /* Endpoint information */
#define JZ_REG_UDC_RAMINFO 0x79 /* RAM information */
#define JZ_REG_UDC_INTR 0x200 /* DMA pending interrupts */
#define JZ_REG_UDC_CNTL1 0x204 /* DMA channel 1 control */
#define JZ_REG_UDC_ADDR1 0x208 /* DMA channel 1 AHB memory addr */
#define JZ_REG_UDC_COUNT1 0x20c /* DMA channel 1 byte count */
#define JZ_REG_UDC_CNTL2 0x214 /* DMA channel 2 control */
#define JZ_REG_UDC_ADDR2 0x218 /* DMA channel 2 AHB memory addr */
#define JZ_REG_UDC_COUNT2 0x21c /* DMA channel 2 byte count */
/* Power register bit masks */
#define USB_POWER_SUSPENDM 0x01
#define USB_POWER_RESUME 0x04
#define USB_POWER_HSMODE 0x10
#define USB_POWER_HSENAB 0x20
#define USB_POWER_SOFTCONN 0x40
/* Interrupt register bit masks */
#define USB_INTR_SUSPEND 0x01
#define USB_INTR_RESUME 0x02
#define USB_INTR_RESET 0x04
#define USB_INTR_EP0 0x0001
#define USB_INTR_INEP1 0x0002
#define USB_INTR_INEP2 0x0004
#define USB_INTR_OUTEP1 0x0002
/* CSR0 bit masks */
#define USB_CSR0_OUTPKTRDY 0x01
#define USB_CSR0_INPKTRDY 0x02
#define USB_CSR0_SENTSTALL 0x04
#define USB_CSR0_DATAEND 0x08
#define USB_CSR0_SETUPEND 0x10
#define USB_CSR0_SENDSTALL 0x20
#define USB_CSR0_SVDOUTPKTRDY 0x40
#define USB_CSR0_SVDSETUPEND 0x80
/* Endpoint CSR register bits */
#define USB_INCSRH_AUTOSET 0x80
#define USB_INCSRH_ISO 0x40
#define USB_INCSRH_MODE 0x20
#define USB_INCSRH_DMAREQENAB 0x10
#define USB_INCSRH_DMAREQMODE 0x04
#define USB_INCSR_CDT 0x40
#define USB_INCSR_SENTSTALL 0x20
#define USB_INCSR_SENDSTALL 0x10
#define USB_INCSR_FF 0x08
#define USB_INCSR_UNDERRUN 0x04
#define USB_INCSR_FFNOTEMPT 0x02
#define USB_INCSR_INPKTRDY 0x01
#define USB_OUTCSRH_AUTOCLR 0x80
#define USB_OUTCSRH_ISO 0x40
#define USB_OUTCSRH_DMAREQENAB 0x20
#define USB_OUTCSRH_DNYT 0x10
#define USB_OUTCSRH_DMAREQMODE 0x08
#define USB_OUTCSR_CDT 0x80
#define USB_OUTCSR_SENTSTALL 0x40
#define USB_OUTCSR_SENDSTALL 0x20
#define USB_OUTCSR_FF 0x10
#define USB_OUTCSR_DATAERR 0x08
#define USB_OUTCSR_OVERRUN 0x04
#define USB_OUTCSR_FFFULL 0x02
#define USB_OUTCSR_OUTPKTRDY 0x01
/* DMA control bits */
#define USB_CNTL_ENA 0x01
#define USB_CNTL_DIR_IN 0x02
#define USB_CNTL_MODE_1 0x04
#define USB_CNTL_INTR_EN 0x08
#define USB_CNTL_EP(n) ((n) << 4)
#define USB_CNTL_BURST_0 (0 << 9)
#define USB_CNTL_BURST_4 (1 << 9)
#define USB_CNTL_BURST_8 (2 << 9)
#define USB_CNTL_BURST_16 (3 << 9)
#ifndef DEBUG
# define DEBUG(fmt,args...) do {} while(0)
#endif
#ifndef DEBUG_EP0
# define NO_STATES
# define DEBUG_EP0(fmt,args...) do {} while(0)
#endif
#ifndef DEBUG_SETUP
# define DEBUG_SETUP(fmt,args...) do {} while(0)
#endif
static struct jz4740_udc jz4740_udc_controller;
/*
* Local declarations.
*/
static int jz4740_udc_start(struct usb_gadget *g,
struct usb_gadget_driver *driver);
static int jz4740_udc_stop(struct usb_gadget *g,
struct usb_gadget_driver *driver);
static void jz4740_ep0_kick(struct jz4740_udc *dev, struct jz4740_ep *ep);
static void jz4740_handle_ep0(struct jz4740_udc *dev, uint32_t intr);
static void done(struct jz4740_ep *ep, struct jz4740_request *req,
int status);
static void pio_irq_enable(struct jz4740_ep *ep);
static void pio_irq_disable(struct jz4740_ep *ep);
static void stop_activity(struct jz4740_udc *dev,
struct usb_gadget_driver *driver);
static void nuke(struct jz4740_ep *ep, int status);
static void flush(struct jz4740_ep *ep);
static void udc_set_address(struct jz4740_udc *dev, unsigned char address);
/*-------------------------------------------------------------------------*/
/* inline functions of register read/write/set/clear */
static inline uint8_t usb_readb(struct jz4740_udc *udc, size_t reg)
{
return readb(udc->base + reg);
}
static inline uint16_t usb_readw(struct jz4740_udc *udc, size_t reg)
{
return readw(udc->base + reg);
}
static inline uint32_t usb_readl(struct jz4740_udc *udc, size_t reg)
{
return readl(udc->base + reg);
}
static inline void usb_writeb(struct jz4740_udc *udc, size_t reg, uint8_t val)
{
writeb(val, udc->base + reg);
}
static inline void usb_writew(struct jz4740_udc *udc, size_t reg, uint16_t val)
{
writew(val, udc->base + reg);
}
static inline void usb_writel(struct jz4740_udc *udc, size_t reg, uint32_t val)
{
writel(val, udc->base + reg);
}
static inline void usb_setb(struct jz4740_udc *udc, size_t reg, uint8_t mask)
{
usb_writeb(udc, reg, usb_readb(udc, reg) | mask);
}
static inline void usb_setw(struct jz4740_udc *udc, size_t reg, uint16_t mask)
{
usb_writew(udc, reg, usb_readw(udc, reg) | mask);
}
static inline void usb_clearb(struct jz4740_udc *udc, size_t reg, uint8_t mask)
{
usb_writeb(udc, reg, usb_readb(udc, reg) & ~mask);
}
static inline void usb_clearw(struct jz4740_udc *udc, size_t reg, uint16_t mask)
{
usb_writew(udc, reg, usb_readw(udc, reg) & ~mask);
}
/*-------------------------------------------------------------------------*/
static inline void jz_udc_set_index(struct jz4740_udc *udc, uint8_t index)
{
usb_writeb(udc, JZ_REG_UDC_INDEX, index);
}
static inline void jz_udc_select_ep(struct jz4740_ep *ep)
{
jz_udc_set_index(ep->dev, ep_index(ep));
}
static inline int write_packet(struct jz4740_ep *ep,
struct jz4740_request *req, unsigned int count)
{
uint8_t *buf;
unsigned int length;
void __iomem *fifo = ep->dev->base + ep->fifo;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
buf = req->req.buf + req->req.actual;
length = req->req.length - req->req.actual;
if (length > count)
length = count;
req->req.actual += length;
DEBUG("Write %d (count %d), fifo %x\n", length, count, ep->fifo);
writesl(fifo, buf, length >> 2);
writesb(fifo, &buf[length - (length & 3)], length & 3);
return length;
}
static int read_packet(struct jz4740_ep *ep,
struct jz4740_request *req, unsigned int count)
{
uint8_t *buf;
unsigned int length;
void __iomem *fifo = ep->dev->base + ep->fifo;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
buf = req->req.buf + req->req.actual;
length = req->req.length - req->req.actual;
if (length > count)
length = count;
req->req.actual += length;
DEBUG("Read %d, fifo %x\n", length, ep->fifo);
readsl(fifo, buf, length >> 2);
readsb(fifo, &buf[length - (length & 3)], length & 3);
return length;
}
/*-------------------------------------------------------------------------*/
/*
* udc_disable - disable USB device controller
*/
static void udc_disable(struct jz4740_udc *dev)
{
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
udc_set_address(dev, 0);
/* Disable interrupts */
usb_writew(dev, JZ_REG_UDC_INTRINE, 0);
usb_writew(dev, JZ_REG_UDC_INTROUTE, 0);
usb_writeb(dev, JZ_REG_UDC_INTRUSBE, 0);
/* Disable DMA */
usb_writel(dev, JZ_REG_UDC_CNTL1, 0);
usb_writel(dev, JZ_REG_UDC_CNTL2, 0);
/* Disconnect from usb */
usb_clearb(dev, JZ_REG_UDC_POWER, USB_POWER_SOFTCONN);
/* Disable the USB PHY */
clk_disable(dev->clk);
dev->ep0state = WAIT_FOR_SETUP;
dev->gadget.speed = USB_SPEED_UNKNOWN;
return;
}
/*
* udc_reinit - initialize software state
*/
static void udc_reinit(struct jz4740_udc *dev)
{
int i;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
/* device/ep0 records init */
INIT_LIST_HEAD(&dev->gadget.ep_list);
INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
dev->ep0state = WAIT_FOR_SETUP;
dev->gadget.max_speed = USB_SPEED_HIGH;
for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
struct jz4740_ep *ep = &dev->ep[i];
if (i != 0)
list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
INIT_LIST_HEAD(&ep->queue);
ep->desc = 0;
ep->stopped = 0;
}
}
/* until it's enabled, this UDC should be completely invisible
* to any USB host.
*/
static void udc_enable(struct jz4740_udc *dev)
{
int i;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
/* UDC state is incorrect - Added by River */
if (dev->state != UDC_STATE_ENABLE) {
return;
}
dev->gadget.speed = USB_SPEED_UNKNOWN;
/* Flush FIFO for each */
for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
struct jz4740_ep *ep = &dev->ep[i];
jz_udc_select_ep(ep);
flush(ep);
}
/* Set this bit to allow the UDC entering low-power mode when
* there are no actions on the USB bus.
* UDC still works during this bit was set.
*/
jz4740_clock_udc_enable_auto_suspend();
/* Enable the USB PHY */
clk_enable(dev->clk);
/* Disable interrupts */
/* usb_writew(dev, JZ_REG_UDC_INTRINE, 0);
usb_writew(dev, JZ_REG_UDC_INTROUTE, 0);
usb_writeb(dev, JZ_REG_UDC_INTRUSBE, 0);*/
/* Enable interrupts */
usb_setw(dev, JZ_REG_UDC_INTRINE, USB_INTR_EP0);
usb_setb(dev, JZ_REG_UDC_INTRUSBE, USB_INTR_RESET);
/* Don't enable rest of the interrupts */
/* usb_setw(dev, JZ_REG_UDC_INTRINE, USB_INTR_INEP1 | USB_INTR_INEP2);
usb_setw(dev, JZ_REG_UDC_INTROUTE, USB_INTR_OUTEP1); */
/* Enable SUSPEND */
/* usb_setb(dev, JZ_REG_UDC_POWER, USB_POWER_SUSPENDM); */
/* Enable HS Mode */
usb_setb(dev, JZ_REG_UDC_POWER, USB_POWER_HSENAB);
/* Let host detect UDC:
* Software must write a 1 to the PMR:USB_POWER_SOFTCONN bit to turn this
* transistor on and pull the USBDP pin HIGH.
*/
usb_setb(dev, JZ_REG_UDC_POWER, USB_POWER_SOFTCONN);
return;
}
/*-------------------------------------------------------------------------*/
/* keeping it simple:
* - one bus driver, initted first;
* - one function driver, initted second
*/
/*
* Register entry point for the peripheral controller driver.
*/
static int jz4740_udc_start(struct usb_gadget *g,
struct usb_gadget_driver *driver)
{
struct jz4740_udc *dev = to_jz4740_udc(g);
/* hook up the driver */
dev->driver = driver;
dev->gadget.dev.driver = &driver->driver;
udc_enable(dev);
DEBUG("%s: registered gadget driver '%s'\n", dev->gadget.name,
driver->driver.name);
return 0;
}
static void stop_activity(struct jz4740_udc *dev,
struct usb_gadget_driver *driver)
{
int i;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
/* 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 < UDC_MAX_ENDPOINTS; i++) {
struct jz4740_ep *ep = &dev->ep[i];
ep->stopped = 1;
jz_udc_select_ep(ep);
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);
}
/*
* Unregister entry point for the peripheral controller driver.
*/
static int jz4740_udc_stop(struct usb_gadget *g,
struct usb_gadget_driver *driver)
{
struct jz4740_udc *dev = to_jz4740_udc(g);
unsigned long flags;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
spin_lock_irqsave(&dev->lock, flags);
dev->driver = 0;
stop_activity(dev, driver);
spin_unlock_irqrestore(&dev->lock, flags);
udc_disable(dev);
DEBUG("unregistered driver '%s'\n", driver->driver.name);
return 0;
}
/*-------------------------------------------------------------------------*/
/** Write request to FIFO (max write == maxp size)
* Return: 0 = still running, 1 = completed, negative = errno
* NOTE: INDEX register must be set for EP
*/
static int write_fifo(struct jz4740_ep *ep, struct jz4740_request *req)
{
struct jz4740_udc *dev = ep->dev;
uint32_t max, csr;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
max = le16_to_cpu(ep->desc->wMaxPacketSize);
csr = usb_readb(dev, ep->csr);
if (!(csr & USB_INCSR_FFNOTEMPT)) {
unsigned count;
int is_last, is_short;
count = write_packet(ep, req, max);
usb_setb(dev, ep->csr, USB_INCSR_INPKTRDY);
/* last packet is usually short (or a zlp) */
if (unlikely(count != max))
is_last = is_short = 1;
else {
if (likely(req->req.length != req->req.actual)
|| req->req.zero)
is_last = 0;
else
is_last = 1;
/* interrupt/iso maxpacket may not fill the fifo */
is_short = unlikely(max < ep_maxpacket(ep));
}
DEBUG("%s: wrote %s %d bytes%s%s %d left %p\n", __FUNCTION__,
ep->ep.name, count,
is_last ? "/L" : "", is_short ? "/S" : "",
req->req.length - req->req.actual, req);
/* requests complete when all IN data is in the FIFO */
if (is_last) {
done(ep, req, 0);
if (list_empty(&ep->queue)) {
pio_irq_disable(ep);
}
return 1;
}
} else {
DEBUG("Hmm.. %d ep FIFO is not empty!\n", ep_index(ep));
}
return 0;
}
/** Read to request from FIFO (max read == bytes in fifo)
* Return: 0 = still running, 1 = completed, negative = errno
* NOTE: INDEX register must be set for EP
*/
static int read_fifo(struct jz4740_ep *ep, struct jz4740_request *req)
{
struct jz4740_udc *dev = ep->dev;
uint32_t csr;
unsigned count, is_short;
/* make sure there's a packet in the FIFO. */
csr = usb_readb(dev, ep->csr);
if (!(csr & USB_OUTCSR_OUTPKTRDY)) {
DEBUG("%s: Packet NOT ready!\n", __FUNCTION__);
return -EINVAL;
}
/* read all bytes from this packet */
count = usb_readw(dev, JZ_REG_UDC_OUTCOUNT);
is_short = (count < ep->ep.maxpacket);
count = read_packet(ep, req, count);
DEBUG("read %s %02x, %d bytes%s req %p %d/%d\n",
ep->ep.name, csr, count,
is_short ? "/S" : "", req, req->req.actual, req->req.length);
/* Clear OutPktRdy */
usb_clearb(dev, ep->csr, USB_OUTCSR_OUTPKTRDY);
/* completion */
if (is_short || req->req.actual == req->req.length) {
done(ep, req, 0);
if (list_empty(&ep->queue))
pio_irq_disable(ep);
return 1;
}
/* finished that packet. the next one may be waiting... */
return 0;
}
/*
* done - retire a request; caller blocked irqs
* INDEX register is preserved to keep same
*/
static void done(struct jz4740_ep *ep, struct jz4740_request *req, int status)
{
unsigned int stopped = ep->stopped;
uint32_t index;
DEBUG("%s, %p\n", __FUNCTION__, ep);
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;
/* Read current index (completion may modify it) */
index = usb_readb(ep->dev, JZ_REG_UDC_INDEX);
spin_unlock_irqrestore(&ep->dev->lock, ep->dev->lock_flags);
req->req.complete(&ep->ep, &req->req);
spin_lock_irqsave(&ep->dev->lock, ep->dev->lock_flags);
/* Restore index */
jz_udc_set_index(ep->dev, index);
ep->stopped = stopped;
}
static inline unsigned int jz4740_udc_ep_irq_enable_reg(struct jz4740_ep *ep)
{
if (ep_is_in(ep))
return JZ_REG_UDC_INTRINE;
else
return JZ_REG_UDC_INTROUTE;
}
/** Enable EP interrupt */
static void pio_irq_enable(struct jz4740_ep *ep)
{
DEBUG("%s: EP%d %s\n", __FUNCTION__, ep_index(ep), ep_is_in(ep) ? "IN": "OUT");
usb_setw(ep->dev, jz4740_udc_ep_irq_enable_reg(ep), BIT(ep_index(ep)));
}
/** Disable EP interrupt */
static void pio_irq_disable(struct jz4740_ep *ep)
{
DEBUG("%s: EP%d %s\n", __FUNCTION__, ep_index(ep), ep_is_in(ep) ? "IN": "OUT");
usb_clearw(ep->dev, jz4740_udc_ep_irq_enable_reg(ep), BIT(ep_index(ep)));
}
/*
* nuke - dequeue ALL requests
*/
static void nuke(struct jz4740_ep *ep, int status)
{
struct jz4740_request *req;
DEBUG("%s, %p\n", __FUNCTION__, ep);
/* Flush FIFO */
flush(ep);
/* called with irqs blocked */
while (!list_empty(&ep->queue)) {
req = list_entry(ep->queue.next, struct jz4740_request, queue);
done(ep, req, status);
}
/* Disable IRQ if EP is enabled (has descriptor) */
if (ep->desc)
pio_irq_disable(ep);
}
/** Flush EP FIFO
* NOTE: INDEX register must be set before this call
*/
static void flush(struct jz4740_ep *ep)
{
DEBUG("%s: %s\n", __FUNCTION__, ep->ep.name);
switch (ep->type) {
case ep_bulk_in:
case ep_interrupt:
usb_setb(ep->dev, ep->csr, USB_INCSR_FF);
break;
case ep_bulk_out:
usb_setb(ep->dev, ep->csr, USB_OUTCSR_FF);
break;
case ep_control:
break;
}
}
/**
* jz4740_in_epn - handle IN interrupt
*/
static void jz4740_in_epn(struct jz4740_udc *dev, uint32_t ep_idx, uint32_t intr)
{
uint32_t csr;
struct jz4740_ep *ep = &dev->ep[ep_idx + 1];
struct jz4740_request *req;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
jz_udc_select_ep(ep);
csr = usb_readb(dev, ep->csr);
DEBUG("%s: %d, csr %x\n", __FUNCTION__, ep_idx, csr);
if (csr & USB_INCSR_SENTSTALL) {
DEBUG("USB_INCSR_SENTSTALL\n");
usb_clearb(dev, ep->csr, USB_INCSR_SENTSTALL);
return;
}
if (!ep->desc) {
DEBUG("%s: NO EP DESC\n", __FUNCTION__);
return;
}
if (!list_empty(&ep->queue)) {
req = list_first_entry(&ep->queue, struct jz4740_request, queue);
write_fifo(ep, req);
}
}
/*
* Bulk OUT (recv)
*/
static void jz4740_out_epn(struct jz4740_udc *dev, uint32_t ep_idx, uint32_t intr)
{
struct jz4740_ep *ep = &dev->ep[ep_idx];
struct jz4740_request *req;
DEBUG("%s: %d\n", __FUNCTION__, ep_idx);
jz_udc_select_ep(ep);
if (ep->desc) {
uint32_t csr;
while ((csr = usb_readb(dev, ep->csr)) &
(USB_OUTCSR_OUTPKTRDY | USB_OUTCSR_SENTSTALL)) {
DEBUG("%s: %x\n", __FUNCTION__, csr);
if (csr & USB_OUTCSR_SENTSTALL) {
DEBUG("%s: stall sent, flush fifo\n",
__FUNCTION__);
/* usb_set(USB_OUT_CSR1_FIFO_FLUSH, ep->csr1); */
flush(ep);
} else if (csr & USB_OUTCSR_OUTPKTRDY) {
if (list_empty(&ep->queue))
req = 0;
else
req =
list_entry(ep->queue.next,
struct jz4740_request,
queue);
if (!req) {
DEBUG("%s: NULL REQ %d\n",
__FUNCTION__, ep_idx);
break;
} else {
read_fifo(ep, req);
}
}
}
} else {
/* Throw packet away.. */
DEBUG("%s: ep %p ep_indx %d No descriptor?!?\n", __FUNCTION__, ep, ep_idx);
flush(ep);
}
}
/** Halt specific EP
* Return 0 if success
* NOTE: Sets INDEX register to EP !
*/
static int jz4740_set_halt(struct usb_ep *_ep, int value)
{
struct jz4740_udc *dev;
struct jz4740_ep *ep;
unsigned long flags;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
ep = container_of(_ep, struct jz4740_ep, ep);
if (unlikely(!_ep || (!ep->desc && ep->type != ep_control))) {
DEBUG("%s, bad ep\n", __FUNCTION__);
return -EINVAL;
}
dev = ep->dev;
spin_lock_irqsave(&dev->lock, flags);
jz_udc_select_ep(ep);
DEBUG("%s, ep %d, val %d\n", __FUNCTION__, ep_index(ep), value);
if (ep_index(ep) == 0) {
/* EP0 */
usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_SENDSTALL);
} else if (ep_is_in(ep)) {
uint32_t csr = usb_readb(dev, ep->csr);
if (value && ((csr & USB_INCSR_FFNOTEMPT)
|| !list_empty(&ep->queue))) {
/*
* Attempts to halt IN endpoints will fail (returning -EAGAIN)
* if any transfer requests are still queued, or if the controller
* FIFO still holds bytes that the host hasn’t collected.
*/
spin_unlock_irqrestore(&dev->lock, flags);
DEBUG
("Attempt to halt IN endpoint failed (returning -EAGAIN) %d %d\n",
(csr & USB_INCSR_FFNOTEMPT),
!list_empty(&ep->queue));
return -EAGAIN;
}
flush(ep);
if (value) {
usb_setb(dev, ep->csr, USB_INCSR_SENDSTALL);
} else {
usb_clearb(dev, ep->csr, USB_INCSR_SENDSTALL);
usb_setb(dev, ep->csr, USB_INCSR_CDT);
}
} else {
flush(ep);
if (value) {
usb_setb(dev, ep->csr, USB_OUTCSR_SENDSTALL);
} else {
usb_clearb(dev, ep->csr, USB_OUTCSR_SENDSTALL);
usb_setb(dev, ep->csr, USB_OUTCSR_CDT);
}
}
ep->stopped = value;
spin_unlock_irqrestore(&dev->lock, flags);
DEBUG("%s %s halted\n", _ep->name, value == 0 ? "NOT" : "IS");
return 0;
}
static int jz4740_ep_enable(struct usb_ep *_ep,
const struct usb_endpoint_descriptor *desc)
{
struct jz4740_ep *ep;
struct jz4740_udc *dev;
unsigned long flags;
uint32_t max, csrh = 0;
DEBUG("%s: trying to enable %s\n", __FUNCTION__, _ep->name);
if (!_ep || !desc)
return -EINVAL;
ep = container_of(_ep, struct jz4740_ep, ep);
if (ep->desc || ep->type == ep_control
|| desc->bDescriptorType != USB_DT_ENDPOINT
|| ep->bEndpointAddress != desc->bEndpointAddress) {
DEBUG("%s, bad ep or descriptor\n", __FUNCTION__);
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", __FUNCTION__, _ep->name);
return -EINVAL;
}
dev = ep->dev;
if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) {
DEBUG("%s, bogus device state\n", __FUNCTION__);
return -ESHUTDOWN;
}
max = le16_to_cpu(desc->wMaxPacketSize);
spin_lock_irqsave(&ep->dev->lock, flags);
/* Configure the endpoint */
jz_udc_select_ep(ep);
if (ep_is_in(ep)) {
usb_writew(dev, JZ_REG_UDC_INMAXP, max);
switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
case USB_ENDPOINT_XFER_BULK:
case USB_ENDPOINT_XFER_INT:
csrh &= ~USB_INCSRH_ISO;
break;
case USB_ENDPOINT_XFER_ISOC:
csrh |= USB_INCSRH_ISO;
break;
}
usb_writeb(dev, JZ_REG_UDC_INCSRH, csrh);
}
else {
usb_writew(dev, JZ_REG_UDC_OUTMAXP, max);
switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
case USB_ENDPOINT_XFER_BULK:
csrh &= ~USB_OUTCSRH_ISO;
break;
case USB_ENDPOINT_XFER_INT:
csrh &= ~USB_OUTCSRH_ISO;
csrh |= USB_OUTCSRH_DNYT;
break;
case USB_ENDPOINT_XFER_ISOC:
csrh |= USB_OUTCSRH_ISO;
break;
}
usb_writeb(dev, JZ_REG_UDC_OUTCSRH, csrh);
}
ep->stopped = 0;
ep->desc = desc;
ep->ep.maxpacket = max;
spin_unlock_irqrestore(&ep->dev->lock, flags);
/* Reset halt state (does flush) */
jz4740_set_halt(_ep, 0);
DEBUG("%s: enabled %s\n", __FUNCTION__, _ep->name);
return 0;
}
/** Disable EP
* NOTE: Sets INDEX register
*/
static int jz4740_ep_disable(struct usb_ep *_ep)
{
struct jz4740_ep *ep;
unsigned long flags;
DEBUG("%s, %p\n", __FUNCTION__, _ep);
ep = container_of(_ep, struct jz4740_ep, ep);
if (!_ep || !ep->desc) {
DEBUG("%s, %s not enabled\n", __FUNCTION__,
_ep ? ep->ep.name : NULL);
return -EINVAL;
}
spin_lock_irqsave(&ep->dev->lock, flags);
jz_udc_select_ep(ep);
/* Nuke all pending requests (does flush) */
nuke(ep, -ESHUTDOWN);
/* Disable ep IRQ */
pio_irq_disable(ep);
ep->desc = 0;
ep->stopped = 1;
spin_unlock_irqrestore(&ep->dev->lock, flags);
DEBUG("%s: disabled %s\n", __FUNCTION__, _ep->name);
return 0;
}
static struct usb_request *jz4740_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
{
struct jz4740_request *req;
req = kzalloc(sizeof(*req), gfp_flags);
if (!req)
return NULL;
INIT_LIST_HEAD(&req->queue);
return &req->req;
}
static void jz4740_free_request(struct usb_ep *ep, struct usb_request *_req)
{
struct jz4740_request *req;
req = container_of(_req, struct jz4740_request, req);
WARN_ON(!list_empty(&req->queue));
kfree(req);
}
/*--------------------------------------------------------------------*/
/** Queue one request
* Kickstart transfer if needed
* NOTE: Sets INDEX register
*/
static int jz4740_queue(struct usb_ep *_ep, struct usb_request *_req,
gfp_t gfp_flags)
{
struct jz4740_request *req;
struct jz4740_ep *ep;
struct jz4740_udc *dev;
DEBUG("%s, %p\n", __FUNCTION__, _ep);
req = container_of(_req, struct jz4740_request, req);
if (unlikely
(!_req || !_req->complete || !_req->buf
|| !list_empty(&req->queue))) {
DEBUG("%s, bad params\n", __FUNCTION__);
return -EINVAL;
}
ep = container_of(_ep, struct jz4740_ep, ep);
if (unlikely(!_ep || (!ep->desc && ep->type != ep_control))) {
DEBUG("%s, bad ep\n", __FUNCTION__);
return -EINVAL;
}
dev = ep->dev;
if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) {
DEBUG("%s, bogus device state %p\n", __FUNCTION__, dev->driver);
return -ESHUTDOWN;
}
DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length,
_req->buf);
spin_lock_irqsave(&dev->lock, dev->lock_flags);
_req->status = -EINPROGRESS;
_req->actual = 0;
/* kickstart this i/o queue? */
DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue),
ep->stopped);
if (list_empty(&ep->queue) && likely(!ep->stopped)) {
uint32_t csr;
if (unlikely(ep_index(ep) == 0)) {
/* EP0 */
list_add_tail(&req->queue, &ep->queue);
jz4740_ep0_kick(dev, ep);
req = 0;
}
else if (ep_is_in(ep)) {
/* EP1 & EP2 */
jz_udc_select_ep(ep);
csr = usb_readb(dev, ep->csr);
pio_irq_enable(ep);
if (!(csr & USB_INCSR_FFNOTEMPT)) {
if (write_fifo(ep, req) == 1)
req = 0;
}
} else {
/* EP1 */
jz_udc_select_ep(ep);
csr = usb_readb(dev, ep->csr);
pio_irq_enable(ep);
if (csr & USB_OUTCSR_OUTPKTRDY) {
if (read_fifo(ep, req) == 1)
req = 0;
}
}
}
/* pio or dma irq handler advances the queue. */
if (likely(req != 0))
list_add_tail(&req->queue, &ep->queue);
spin_unlock_irqrestore(&dev->lock, dev->lock_flags);
return 0;
}
/* dequeue JUST ONE request */
static int jz4740_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
struct jz4740_ep *ep;
struct jz4740_request *req;
unsigned long flags;
DEBUG("%s, %p\n", __FUNCTION__, _ep);
ep = container_of(_ep, struct jz4740_ep, ep);
if (!_ep || ep->type == ep_control)
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
* NOTE: Sets INDEX register to EP
*/
static int jz4740_fifo_status(struct usb_ep *_ep)
{
uint32_t csr;
int count = 0;
struct jz4740_ep *ep;
unsigned long flags;
ep = container_of(_ep, struct jz4740_ep, ep);
if (!_ep) {
DEBUG("%s, bad ep\n", __FUNCTION__);
return -ENODEV;
}
DEBUG("%s, %d\n", __FUNCTION__, ep_index(ep));
/* LPD can't report unclaimed bytes from IN fifos */
if (ep_is_in(ep))
return -EOPNOTSUPP;
spin_lock_irqsave(&ep->dev->lock, flags);
jz_udc_select_ep(ep);
csr = usb_readb(ep->dev, ep->csr);
if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN ||
csr & 0x1) {
count = usb_readw(ep->dev, JZ_REG_UDC_OUTCOUNT);
}
spin_unlock_irqrestore(&ep->dev->lock, flags);
return count;
}
/** Flush EP FIFO
* NOTE: Sets INDEX register to EP
*/
static void jz4740_fifo_flush(struct usb_ep *_ep)
{
struct jz4740_ep *ep;
unsigned long flags;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
ep = container_of(_ep, struct jz4740_ep, ep);
if (unlikely(!_ep || (!ep->desc && ep->type == ep_control))) {
DEBUG("%s, bad ep\n", __FUNCTION__);
return;
}
spin_lock_irqsave(&ep->dev->lock, flags);
jz_udc_select_ep(ep);
flush(ep);
spin_unlock_irqrestore(&ep->dev->lock, flags);
}
/****************************************************************/
/* End Point 0 related functions */
/****************************************************************/
/* return: 0 = still running, 1 = completed, negative = errno */
static int write_fifo_ep0(struct jz4740_ep *ep, struct jz4740_request *req)
{
uint32_t max;
unsigned count;
int is_last;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
max = ep_maxpacket(ep);
count = write_packet(ep, req, max);
/* last packet is usually short (or a zlp) */
if (unlikely(count != max))
is_last = 1;
else {
if (likely(req->req.length != req->req.actual) || req->req.zero)
is_last = 0;
else
is_last = 1;
}
DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __FUNCTION__,
ep->ep.name, count,
is_last ? "/L" : "", req->req.length - req->req.actual, req);
/* requests complete when all IN data is in the FIFO */
if (is_last) {
done(ep, req, 0);
return 1;
}
return 0;
}
static inline int jz4740_fifo_read(struct jz4740_ep *ep,
unsigned char *cp, int max)
{
int bytes;
int count = usb_readw(ep->dev, JZ_REG_UDC_OUTCOUNT);
if (count > max)
count = max;
bytes = count;
while (count--)
*cp++ = usb_readb(ep->dev, ep->fifo);
return bytes;
}
static inline void jz4740_fifo_write(struct jz4740_ep *ep,
unsigned char *cp, int count)
{
DEBUG("fifo_write: %d %d\n", ep_index(ep), count);
while (count--)
usb_writeb(ep->dev, ep->fifo, *cp++);
}
static int read_fifo_ep0(struct jz4740_ep *ep, struct jz4740_request *req)
{
struct jz4740_udc *dev = ep->dev;
uint32_t csr;
uint8_t *buf;
unsigned bufferspace, count, is_short;
DEBUG_EP0("%s\n", __FUNCTION__);
csr = usb_readb(dev, JZ_REG_UDC_CSR0);
if (!(csr & USB_CSR0_OUTPKTRDY))
return 0;
buf = req->req.buf + req->req.actual;
prefetchw(buf);
bufferspace = req->req.length - req->req.actual;
/* read all bytes from this packet */
if (likely(csr & USB_CSR0_OUTPKTRDY)) {
count = usb_readw(dev, JZ_REG_UDC_OUTCOUNT);
req->req.actual += min(count, bufferspace);
} else /* zlp */
count = 0;
is_short = (count < ep->ep.maxpacket);
DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n",
ep->ep.name, csr, count,
is_short ? "/S" : "", req, req->req.actual, req->req.length);
while (likely(count-- != 0)) {
uint8_t byte = (uint8_t)usb_readl(dev, ep->fifo);
if (unlikely(bufferspace == 0)) {
/* this happens when the driver's buffer
* is smaller than what the host sent.
* discard the extra data.
*/
if (req->req.status != -EOVERFLOW)
DEBUG_EP0("%s overflow %d\n", ep->ep.name,
count);
req->req.status = -EOVERFLOW;
} else {
*buf++ = byte;
bufferspace--;
}
}
/* completion */
if (is_short || req->req.actual == req->req.length) {
done(ep, req, 0);
return 1;
}
/* finished that packet. the next one may be waiting... */
return 0;
}
/**
* udc_set_address - set the USB address for this device
* @address:
*
* Called from control endpoint function after it decodes a set address setup packet.
*/
static void udc_set_address(struct jz4740_udc *dev, unsigned char address)
{
DEBUG_EP0("%s: %d\n", __FUNCTION__, address);
usb_writeb(dev, JZ_REG_UDC_FADDR, address);
}
/*
* DATA_STATE_RECV (USB_CSR0_OUTPKTRDY)
* - if error
* set USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND | USB_CSR0_SENDSTALL bits
* - else
* set USB_CSR0_SVDOUTPKTRDY bit
if last set USB_CSR0_DATAEND bit
*/
static void jz4740_ep0_out(struct jz4740_udc *dev, uint32_t csr, int kickstart)
{
struct jz4740_request *req;
struct jz4740_ep *ep = &dev->ep[0];
int ret;
DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
if (list_empty(&ep->queue))
req = 0;
else
req = list_entry(ep->queue.next, struct jz4740_request, queue);
if (req) {
if (req->req.length == 0) {
DEBUG_EP0("ZERO LENGTH OUT!\n");
usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND));
dev->ep0state = WAIT_FOR_SETUP;
return;
} else if (kickstart) {
usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY));
return;
}
ret = read_fifo_ep0(ep, req);
if (ret) {
/* Done! */
DEBUG_EP0("%s: finished, waiting for status\n",
__FUNCTION__);
usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND));
dev->ep0state = WAIT_FOR_SETUP;
} else {
/* Not done yet.. */
DEBUG_EP0("%s: not finished\n", __FUNCTION__);
usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_SVDOUTPKTRDY);
}
} else {
DEBUG_EP0("NO REQ??!\n");
}
}
/*
* DATA_STATE_XMIT
*/
static int jz4740_ep0_in(struct jz4740_udc *dev, uint32_t csr)
{
struct jz4740_request *req;
struct jz4740_ep *ep = &dev->ep[0];
int ret, need_zlp = 0;
DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
if (list_empty(&ep->queue))
req = 0;
else
req = list_entry(ep->queue.next, struct jz4740_request, queue);
if (!req) {
DEBUG_EP0("%s: NULL REQ\n", __FUNCTION__);
return 0;
}
if (req->req.length == 0) {
usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_INPKTRDY | USB_CSR0_DATAEND));
dev->ep0state = WAIT_FOR_SETUP;
return 1;
}
if (req->req.length - req->req.actual == EP0_MAXPACKETSIZE) {
/* Next write will end with the packet size, */
/* so we need zero-length-packet */
need_zlp = 1;
}
ret = write_fifo_ep0(ep, req);
if (ret == 1 && !need_zlp) {
/* Last packet */
DEBUG_EP0("%s: finished, waiting for status\n", __FUNCTION__);
usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_INPKTRDY | USB_CSR0_DATAEND));
dev->ep0state = WAIT_FOR_SETUP;
} else {
DEBUG_EP0("%s: not finished\n", __FUNCTION__);
usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_INPKTRDY);
}
if (need_zlp) {
DEBUG_EP0("%s: Need ZLP!\n", __FUNCTION__);
usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_INPKTRDY);
dev->ep0state = DATA_STATE_NEED_ZLP;
}
return 1;
}
static int jz4740_handle_get_status(struct jz4740_udc *dev,
struct usb_ctrlrequest *ctrl)
{
struct jz4740_ep *ep0 = &dev->ep[0];
struct jz4740_ep *qep;
int reqtype = (ctrl->bRequestType & USB_RECIP_MASK);
uint16_t val = 0;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
if (reqtype == USB_RECIP_INTERFACE) {
/* This is not supported.
* And according to the USB spec, this one does nothing..
* Just return 0
*/
DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n");
} else if (reqtype == USB_RECIP_DEVICE) {
DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n");
val |= (1 << 0); /* Self powered */
/*val |= (1<<1); *//* Remote wakeup */
} else if (reqtype == USB_RECIP_ENDPOINT) {
int ep_num = (ctrl->wIndex & ~USB_DIR_IN);
DEBUG_SETUP
("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n",
ep_num, ctrl->wLength);
if (ctrl->wLength > 2 || ep_num > 3)
return -EOPNOTSUPP;
qep = &dev->ep[ep_num];
if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0)
&& ep_index(qep) != 0) {
return -EOPNOTSUPP;
}
jz_udc_select_ep(qep);
/* Return status on next IN token */
switch (qep->type) {
case ep_control:
val =
(usb_readb(dev, qep->csr) & USB_CSR0_SENDSTALL) ==
USB_CSR0_SENDSTALL;
break;
case ep_bulk_in:
case ep_interrupt:
val =
(usb_readb(dev, qep->csr) & USB_INCSR_SENDSTALL) ==
USB_INCSR_SENDSTALL;
break;
case ep_bulk_out:
val =
(usb_readb(dev, qep->csr) & USB_OUTCSR_SENDSTALL) ==
USB_OUTCSR_SENDSTALL;
break;
}
/* Back to EP0 index */
jz_udc_set_index(dev, 0);
DEBUG_SETUP("GET_STATUS, ep: %d (%x), val = %d\n", ep_num,
ctrl->wIndex, val);
} else {
DEBUG_SETUP("Unknown REQ TYPE: %d\n", reqtype);
return -EOPNOTSUPP;
}
/* Clear "out packet ready" */
usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_SVDOUTPKTRDY);
/* Put status to FIFO */
jz4740_fifo_write(ep0, (uint8_t *)&val, sizeof(val));
/* Issue "In packet ready" */
usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_INPKTRDY | USB_CSR0_DATAEND));
return 0;
}
/*
* WAIT_FOR_SETUP (OUTPKTRDY)
* - read data packet from EP0 FIFO
* - decode command
* - if error
* set USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND | USB_CSR0_SENDSTALL bits
* - else
* set USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND bits
*/
static void jz4740_ep0_setup(struct jz4740_udc *dev, uint32_t csr)
{
struct jz4740_ep *ep = &dev->ep[0];
struct usb_ctrlrequest ctrl;
int i;
DEBUG_SETUP("%s: %x\n", __FUNCTION__, csr);
/* Nuke all previous transfers */
nuke(ep, -EPROTO);
/* read control req from fifo (8 bytes) */
jz4740_fifo_read(ep, (unsigned char *)&ctrl, 8);
DEBUG_SETUP("SETUP %02x.%02x v%04x i%04x l%04x\n",
ctrl.bRequestType, ctrl.bRequest,
ctrl.wValue, ctrl.wIndex, ctrl.wLength);
/* Set direction of EP0 */
if (likely(ctrl.bRequestType & USB_DIR_IN)) {
ep->bEndpointAddress |= USB_DIR_IN;
} else {
ep->bEndpointAddress &= ~USB_DIR_IN;
}
/* Handle some SETUP packets ourselves */
switch (ctrl.bRequest) {
case USB_REQ_SET_ADDRESS:
if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
break;
DEBUG_SETUP("USB_REQ_SET_ADDRESS (%d)\n", ctrl.wValue);
udc_set_address(dev, ctrl.wValue);
usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND));
return;
case USB_REQ_SET_CONFIGURATION:
if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
break;
DEBUG_SETUP("USB_REQ_SET_CONFIGURATION (%d)\n", ctrl.wValue);
/* usb_setb(JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND));*/
/* Enable RESUME and SUSPEND interrupts */
usb_setb(dev, JZ_REG_UDC_INTRUSBE, (USB_INTR_RESUME | USB_INTR_SUSPEND));
break;
case USB_REQ_SET_INTERFACE:
if (ctrl.bRequestType != (USB_TYPE_STANDARD | USB_RECIP_DEVICE))
break;
DEBUG_SETUP("USB_REQ_SET_INTERFACE (%d)\n", ctrl.wValue);
/* usb_setb(JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND));*/
break;
case USB_REQ_GET_STATUS:
if (jz4740_handle_get_status(dev, &ctrl) == 0)
return;
case USB_REQ_CLEAR_FEATURE:
case USB_REQ_SET_FEATURE:
if (ctrl.bRequestType == USB_RECIP_ENDPOINT) {
struct jz4740_ep *qep;
int ep_num = (ctrl.wIndex & 0x0f);
/* Support only HALT feature */
if (ctrl.wValue != 0 || ctrl.wLength != 0
|| ep_num > 3 || ep_num < 1)
break;
qep = &dev->ep[ep_num];
spin_unlock(&dev->lock);
if (ctrl.bRequest == USB_REQ_SET_FEATURE) {
DEBUG_SETUP("SET_FEATURE (%d)\n",
ep_num);
jz4740_set_halt(&qep->ep, 1);
} else {
DEBUG_SETUP("CLR_FEATURE (%d)\n",
ep_num);
jz4740_set_halt(&qep->ep, 0);
}
spin_lock(&dev->lock);
jz_udc_set_index(dev, 0);
/* Reply with a ZLP on next IN token */
usb_setb(dev, JZ_REG_UDC_CSR0,
(USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND));
return;
}
break;
default:
break;
}
/* gadget drivers see class/vendor specific requests,
* {SET,GET}_{INTERFACE,DESCRIPTOR,CONFIGURATION},
* and more.
*/
if (dev->driver) {
/* device-2-host (IN) or no data setup command, process immediately */
spin_unlock(&dev->lock);
i = dev->driver->setup(&dev->gadget, &ctrl);
spin_lock(&dev->lock);
if (unlikely(i < 0)) {
/* setup processing failed, force stall */
DEBUG_SETUP
(" --> ERROR: gadget setup FAILED (stalling), setup returned %d\n",
i);
jz_udc_set_index(dev, 0);
usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND | USB_CSR0_SENDSTALL));
/* ep->stopped = 1; */
dev->ep0state = WAIT_FOR_SETUP;
}
else {
DEBUG_SETUP("gadget driver setup ok (%d)\n", ctrl.wLength);
/* if (!ctrl.wLength) {
usb_setb(JZ_REG_UDC_CSR0, USB_CSR0_SVDOUTPKTRDY);
}*/
}
}
}
/*
* DATA_STATE_NEED_ZLP
*/
static void jz4740_ep0_in_zlp(struct jz4740_udc *dev, uint32_t csr)
{
DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_INPKTRDY | USB_CSR0_DATAEND));
dev->ep0state = WAIT_FOR_SETUP;
}
/*
* handle ep0 interrupt
*/
static void jz4740_handle_ep0(struct jz4740_udc *dev, uint32_t intr)
{
struct jz4740_ep *ep = &dev->ep[0];
uint32_t csr;
DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
/* Set index 0 */
jz_udc_set_index(dev, 0);
csr = usb_readb(dev, JZ_REG_UDC_CSR0);
DEBUG_EP0("%s: csr = %x state = \n", __FUNCTION__, csr);//, state_names[dev->ep0state]);
/*
* if SENT_STALL is set
* - clear the SENT_STALL bit
*/
if (csr & USB_CSR0_SENTSTALL) {
DEBUG_EP0("%s: USB_CSR0_SENTSTALL is set: %x\n", __FUNCTION__, csr);
usb_clearb(dev, JZ_REG_UDC_CSR0, USB_CSR0_SENDSTALL | USB_CSR0_SENTSTALL);
nuke(ep, -ECONNABORTED);
dev->ep0state = WAIT_FOR_SETUP;
return;
}
/*
* if a transfer is in progress && INPKTRDY and OUTPKTRDY are clear
* - fill EP0 FIFO
* - if last packet
* - set IN_PKT_RDY | DATA_END
* - else
* set IN_PKT_RDY
*/
if (!(csr & (USB_CSR0_INPKTRDY | USB_CSR0_OUTPKTRDY))) {
DEBUG_EP0("%s: INPKTRDY and OUTPKTRDY are clear\n",
__FUNCTION__);
switch (dev->ep0state) {
case DATA_STATE_XMIT:
DEBUG_EP0("continue with DATA_STATE_XMIT\n");
jz4740_ep0_in(dev, csr);
return;
case DATA_STATE_NEED_ZLP:
DEBUG_EP0("continue with DATA_STATE_NEED_ZLP\n");
jz4740_ep0_in_zlp(dev, csr);
return;
default:
/* Stall? */
// DEBUG_EP0("Odd state!! state = %s\n",
// state_names[dev->ep0state]);
dev->ep0state = WAIT_FOR_SETUP;
/* nuke(ep, 0); */
/* usb_setb(ep->csr, USB_CSR0_SENDSTALL); */
// break;
return;
}
}
/*
* if SETUPEND is set
* - abort the last transfer
* - set SERVICED_SETUP_END_BIT
*/
if (csr & USB_CSR0_SETUPEND) {
DEBUG_EP0("%s: USB_CSR0_SETUPEND is set: %x\n", __FUNCTION__, csr);
usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_SVDSETUPEND);
nuke(ep, 0);
dev->ep0state = WAIT_FOR_SETUP;
}
/*
* if USB_CSR0_OUTPKTRDY is set
* - read data packet from EP0 FIFO
* - decode command
* - if error
* set SVDOUTPKTRDY | DATAEND | SENDSTALL bits
* - else
* set SVDOUTPKTRDY | DATAEND bits
*/
if (csr & USB_CSR0_OUTPKTRDY) {
DEBUG_EP0("%s: EP0_OUT_PKT_RDY is set: %x\n", __FUNCTION__,
csr);
switch (dev->ep0state) {
case WAIT_FOR_SETUP:
DEBUG_EP0("WAIT_FOR_SETUP\n");
jz4740_ep0_setup(dev, csr);
break;
case DATA_STATE_RECV:
DEBUG_EP0("DATA_STATE_RECV\n");
jz4740_ep0_out(dev, csr, 0);
break;
default:
/* send stall? */
DEBUG_EP0("strange state!! 2. send stall? state = %d\n",
dev->ep0state);
break;
}
}
}
static void jz4740_ep0_kick(struct jz4740_udc *dev, struct jz4740_ep *ep)
{
uint32_t csr;
jz_udc_set_index(dev, 0);
DEBUG_EP0("%s: %x\n", __FUNCTION__, csr);
/* Clear "out packet ready" */
if (ep_is_in(ep)) {
usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_SVDOUTPKTRDY);
csr = usb_readb(dev, JZ_REG_UDC_CSR0);
dev->ep0state = DATA_STATE_XMIT;
jz4740_ep0_in(dev, csr);
} else {
csr = usb_readb(dev, JZ_REG_UDC_CSR0);
dev->ep0state = DATA_STATE_RECV;
jz4740_ep0_out(dev, csr, 1);
}
}
/** Handle USB RESET interrupt
*/
static void jz4740_reset_irq(struct jz4740_udc *dev)
{
dev->gadget.speed = (usb_readb(dev, JZ_REG_UDC_POWER) & USB_POWER_HSMODE) ?
USB_SPEED_HIGH : USB_SPEED_FULL;
DEBUG_SETUP("%s: address = %d, speed = %s\n", __FUNCTION__, 0,
(dev->gadget.speed == USB_SPEED_HIGH) ? "HIGH":"FULL" );
}
/*
* jz4740 usb device interrupt handler.
*/
static irqreturn_t jz4740_udc_irq(int irq, void *devid)
{
struct jz4740_udc *jz4740_udc = devid;
uint8_t index;
uint32_t intr_usb = usb_readb(jz4740_udc, JZ_REG_UDC_INTRUSB) & 0x7; /* mask SOF */
uint32_t intr_in = usb_readw(jz4740_udc, JZ_REG_UDC_INTRIN);
uint32_t intr_out = usb_readw(jz4740_udc, JZ_REG_UDC_INTROUT);
uint32_t intr_dma = usb_readb(jz4740_udc, JZ_REG_UDC_INTR);
if (!intr_usb && !intr_in && !intr_out && !intr_dma)
return IRQ_HANDLED;
DEBUG("intr_out=%x intr_in=%x intr_usb=%x\n",
intr_out, intr_in, intr_usb);
spin_lock(&jz4740_udc->lock);
index = usb_readb(jz4740_udc, JZ_REG_UDC_INDEX);
/* Check for resume from suspend mode */
if ((intr_usb & USB_INTR_RESUME) &&
(usb_readb(jz4740_udc, JZ_REG_UDC_INTRUSBE) & USB_INTR_RESUME)) {
DEBUG("USB resume\n");
jz4740_udc->driver->resume(&jz4740_udc->gadget); /* We have suspend(), so we must have resume() too. */
}
/* Check for system interrupts */
if (intr_usb & USB_INTR_RESET) {
DEBUG("USB reset\n");
jz4740_reset_irq(jz4740_udc);
}
/* Check for endpoint 0 interrupt */
if (intr_in & USB_INTR_EP0) {
DEBUG("USB_INTR_EP0 (control)\n");
jz4740_handle_ep0(jz4740_udc, intr_in);
}
/* Check for Bulk-IN DMA interrupt */
if (intr_dma & 0x1) {
int ep_num;
struct jz4740_ep *ep;
ep_num = (usb_readl(jz4740_udc, JZ_REG_UDC_CNTL1) >> 4) & 0xf;
ep = &jz4740_udc->ep[ep_num + 1];
jz_udc_select_ep(ep);
usb_setb(jz4740_udc, ep->csr, USB_INCSR_INPKTRDY);
/* jz4740_in_epn(jz4740_udc, ep_num, intr_in);*/
}
/* Check for Bulk-OUT DMA interrupt */
if (intr_dma & 0x2) {
int ep_num;
ep_num = (usb_readl(jz4740_udc, JZ_REG_UDC_CNTL2) >> 4) & 0xf;
jz4740_out_epn(jz4740_udc, ep_num, intr_out);
}
/* Check for each configured endpoint interrupt */
if (intr_in & USB_INTR_INEP1) {
DEBUG("USB_INTR_INEP1\n");
jz4740_in_epn(jz4740_udc, 1, intr_in);
}
if (intr_in & USB_INTR_INEP2) {
DEBUG("USB_INTR_INEP2\n");
jz4740_in_epn(jz4740_udc, 2, intr_in);
}
if (intr_out & USB_INTR_OUTEP1) {
DEBUG("USB_INTR_OUTEP1\n");
jz4740_out_epn(jz4740_udc, 1, intr_out);
}
/* Check for suspend mode */
if ((intr_usb & USB_INTR_SUSPEND) &&
(usb_readb(jz4740_udc, JZ_REG_UDC_INTRUSBE) & USB_INTR_SUSPEND)) {
DEBUG("USB suspend\n");
jz4740_udc->driver->suspend(&jz4740_udc->gadget);
/* Host unloaded from us, can do something, such as flushing
the NAND block cache etc. */
}
jz_udc_set_index(jz4740_udc, index);
spin_unlock(&jz4740_udc->lock);
return IRQ_HANDLED;
}
/*-------------------------------------------------------------------------*/
static inline struct jz4740_udc *gadget_to_udc(struct usb_gadget *gadget)
{
return container_of(gadget, struct jz4740_udc, gadget);
}
static int jz4740_udc_get_frame(struct usb_gadget *_gadget)
{
DEBUG("%s, %p\n", __FUNCTION__, _gadget);
return usb_readw(gadget_to_udc(_gadget), JZ_REG_UDC_FRAME);
}
static int jz4740_udc_wakeup(struct usb_gadget *_gadget)
{
/* host may not have enabled remote wakeup */
/*if ((UDCCS0 & UDCCS0_DRWF) == 0)
return -EHOSTUNREACH;
udc_set_mask_UDCCR(UDCCR_RSM); */
return -ENOTSUPP;
}
static int jz4740_udc_pullup(struct usb_gadget *_gadget, int on)
{
struct jz4740_udc *udc = gadget_to_udc(_gadget);
unsigned long flags;
local_irq_save(flags);
if (on) {
udc->state = UDC_STATE_ENABLE;
udc_enable(udc);
} else {
udc->state = UDC_STATE_DISABLE;
udc_disable(udc);
}
local_irq_restore(flags);
return 0;
}
static const struct usb_gadget_ops jz4740_udc_ops = {
.get_frame = jz4740_udc_get_frame,
.wakeup = jz4740_udc_wakeup,
.pullup = jz4740_udc_pullup,
.udc_start = jz4740_udc_start,
.udc_stop = jz4740_udc_stop,
};
static struct usb_ep_ops jz4740_ep_ops = {
.enable = jz4740_ep_enable,
.disable = jz4740_ep_disable,
.alloc_request = jz4740_alloc_request,
.free_request = jz4740_free_request,
.queue = jz4740_queue,
.dequeue = jz4740_dequeue,
.set_halt = jz4740_set_halt,
.fifo_status = jz4740_fifo_status,
.fifo_flush = jz4740_fifo_flush,
};
/*-------------------------------------------------------------------------*/
static struct jz4740_udc jz4740_udc_controller = {
.gadget = {
.ops = &jz4740_udc_ops,
.ep0 = &jz4740_udc_controller.ep[0].ep,
.name = "jz4740-udc",
.dev = {
.init_name = "gadget",
},
},
/* control endpoint */
.ep[0] = {
.ep = {
.name = "ep0",
.ops = &jz4740_ep_ops,
.maxpacket = EP0_MAXPACKETSIZE,
},
.dev = &jz4740_udc_controller,
.bEndpointAddress = 0,
.bmAttributes = 0,
.type = ep_control,
.fifo = JZ_REG_UDC_EP_FIFO(0),
.csr = JZ_REG_UDC_CSR0,
},
/* bulk out endpoint */
.ep[1] = {
.ep = {
.name = "ep1out-bulk",
.ops = &jz4740_ep_ops,
.maxpacket = EPBULK_MAXPACKETSIZE,
},
.dev = &jz4740_udc_controller,
.bEndpointAddress = 1,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.type = ep_bulk_out,
.fifo = JZ_REG_UDC_EP_FIFO(1),
.csr = JZ_REG_UDC_OUTCSR,
},
/* bulk in endpoint */
.ep[2] = {
.ep = {
.name = "ep1in-bulk",
.ops = &jz4740_ep_ops,
.maxpacket = EPBULK_MAXPACKETSIZE,
},
.dev = &jz4740_udc_controller,
.bEndpointAddress = 1 | USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_BULK,
.type = ep_bulk_in,
.fifo = JZ_REG_UDC_EP_FIFO(1),
.csr = JZ_REG_UDC_INCSR,
},
/* interrupt in endpoint */
.ep[3] = {
.ep = {
.name = "ep2in-int",
.ops = &jz4740_ep_ops,
.maxpacket = EPINTR_MAXPACKETSIZE,
},
.dev = &jz4740_udc_controller,
.bEndpointAddress = 2 | USB_DIR_IN,
.bmAttributes = USB_ENDPOINT_XFER_INT,
.type = ep_interrupt,
.fifo = JZ_REG_UDC_EP_FIFO(2),
.csr = JZ_REG_UDC_INCSR,
},
};
static int jz4740_udc_probe(struct platform_device *pdev)
{
struct jz4740_udc *jz4740_udc = &jz4740_udc_controller;
int ret;
spin_lock_init(&jz4740_udc->lock);
jz4740_udc->dev = &pdev->dev;
jz4740_udc->gadget.dev.parent = &pdev->dev;
jz4740_udc->gadget.dev.dma_mask = pdev->dev.dma_mask;
jz4740_udc->clk = clk_get(&pdev->dev, "udc");
if (IS_ERR(jz4740_udc->clk)) {
ret = PTR_ERR(jz4740_udc->clk);
dev_err(&pdev->dev, "Failed to get udc clock: %d\n", ret);
goto err;
}
platform_set_drvdata(pdev, jz4740_udc);
jz4740_udc->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!jz4740_udc->mem) {
ret = -ENOENT;
dev_err(&pdev->dev, "Failed to get mmio memory resource\n");
goto err_clk_put;
}
jz4740_udc->mem = request_mem_region(jz4740_udc->mem->start,
resource_size(jz4740_udc->mem), pdev->name);
if (!jz4740_udc->mem) {
ret = -EBUSY;
dev_err(&pdev->dev, "Failed to request mmio memory region\n");
goto err;
}
jz4740_udc->base = ioremap(jz4740_udc->mem->start, resource_size(jz4740_udc->mem));
if (!jz4740_udc->base) {
ret = -EBUSY;
dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
goto err_release_mem_region;
}
jz4740_udc->irq = platform_get_irq(pdev, 0);
ret = request_irq(jz4740_udc->irq, jz4740_udc_irq, 0, pdev->name,
jz4740_udc);
if (ret) {
dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
goto err_iounmap;
}
ret = usb_add_gadget_udc(&pdev->dev, &jz4740_udc->gadget);
if (ret) {
dev_err(&pdev->dev, "Failed to add gadget: %d\n", ret);
goto err_free_irq;
}
udc_disable(jz4740_udc);
udc_reinit(jz4740_udc);
return 0;
err_free_irq:
free_irq(jz4740_udc->irq, pdev);
err_iounmap:
iounmap(jz4740_udc->base);
err_release_mem_region:
release_mem_region(jz4740_udc->mem->start, resource_size(jz4740_udc->mem));
err_clk_put:
clk_put(jz4740_udc->clk);
err:
platform_set_drvdata(pdev, NULL);
return ret;
}
static int jz4740_udc_remove(struct platform_device *pdev)
{
struct jz4740_udc *dev = platform_get_drvdata(pdev);
usb_del_gadget_udc(&dev->gadget);
if (dev->driver)
return -EBUSY;
udc_disable(dev);
free_irq(dev->irq, dev);
iounmap(dev->base);
release_mem_region(dev->mem->start, resource_size(dev->mem));
clk_put(dev->clk);
platform_set_drvdata(pdev, NULL);
return 0;
}
#ifdef CONFIG_PM
static int jz4740_udc_suspend(struct device *dev)
{
struct jz4740_udc *jz4740_udc = dev_get_drvdata(dev);
if (jz4740_udc->state == UDC_STATE_ENABLE)
udc_disable(jz4740_udc);
return 0;
}
static int jz4740_udc_resume(struct device *dev)
{
struct jz4740_udc *jz4740_udc = dev_get_drvdata(dev);
if (jz4740_udc->state == UDC_STATE_ENABLE)
udc_enable(jz4740_udc);
return 0;
}
static SIMPLE_DEV_PM_OPS(jz4740_udc_pm_ops, jz4740_udc_suspend, jz4740_udc_resume);
#define JZ4740_UDC_PM_OPS (&jz4740_udc_pm_ops)
#else
#define JZ4740_UDC_PM_OPS NULL
#endif
static struct platform_driver udc_driver = {
.probe = jz4740_udc_probe,
.remove = jz4740_udc_remove,
.driver = {
.name = "jz-udc",
.owner = THIS_MODULE,
.pm = JZ4740_UDC_PM_OPS,
},
};
/*-------------------------------------------------------------------------*/
static int __init udc_init (void)
{
return platform_driver_register(&udc_driver);
}
module_init(udc_init);
static void __exit udc_exit (void)
{
platform_driver_unregister(&udc_driver);
}
module_exit(udc_exit);
MODULE_DESCRIPTION("JZ4740 USB Device Controller");
MODULE_AUTHOR("Wei Jianli <jlwei@ingenic.cn>");
MODULE_LICENSE("GPL");
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