+++ /dev/null
-/*
- * 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/system.h>
-#include <asm/mach-jz4740/jz4740.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 Managemetn 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
-
-/* Testmode register bits */
-#define USB_TEST_SE0NAK 0x01
-#define USB_TEST_J 0x02
-#define USB_TEST_K 0x04
-#define USB_TEST_PACKET 0x08
-
-/* 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 unsigned int use_dma = 0; /* 1: use DMA, 0: use PIO */
-
-module_param(use_dma, int, 0);
-MODULE_PARM_DESC(use_dma, "DMA mode enable flag");
-
-struct jz4740_udc *the_controller;
-
-/*
- * Local declarations.
- */
-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, uint8_t mask)
-{
- usb_writew(udc, reg, usb_readw(udc, reg) | mask);
-}
-
-static inline void usb_setl(struct jz4740_udc *udc, size_t reg, uint32_t mask)
-{
- usb_writel(udc, reg, usb_readl(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 usb_clearl(struct jz4740_udc *udc, size_t reg, uint32_t mask)
-{
- usb_writel(udc, reg, usb_readl(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, int max)
-{
- uint8_t *buf;
- int length, nlong, nbyte;
- DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
-
- buf = req->req.buf + req->req.actual;
- prefetch(buf);
-
- length = req->req.length - req->req.actual;
- length = min(length, max);
- req->req.actual += length;
-
- DEBUG("Write %d (max %d), fifo %x\n", length, max, ep->fifo);
-
- nlong = length >> 2;
- nbyte = length & 0x3;
- while (nlong--) {
- usb_writel(ep->dev, ep->fifo, *((uint32_t *)buf));
- buf += 4;
- }
- while (nbyte--) {
- usb_writeb(ep->dev, ep->fifo, *buf++);
- }
-
- return length;
-}
-
-static inline int read_packet(struct jz4740_ep *ep,
- struct jz4740_request *req, int count)
-{
- uint8_t *buf;
- int length, nlong, nbyte;
- DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
-
- buf = req->req.buf + req->req.actual;
- prefetchw(buf);
-
- length = req->req.length - req->req.actual;
- length = min(length, count);
- req->req.actual += length;
-
- DEBUG("Read %d, fifo %x\n", length, ep->fifo);
-
- nlong = length >> 2;
- nbyte = length & 0x3;
- while (nlong--) {
- *((uint32_t *)buf) = usb_readl(ep->dev, ep->fifo);
- buf += 4;
- }
- while (nbyte--) {
- *buf++ = usb_readb(ep->dev, ep->fifo);
- }
-
- 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;
-
- 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;
- ep->pio_irqs = 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_set_index(dev, ep_index(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.
- */
-
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
-{
- struct jz4740_udc *dev = the_controller;
- int retval;
-
- if (!driver || !driver->bind) {
- return -EINVAL;
- }
-
- if (!dev) {
- return -ENODEV;
- }
-
- if (dev->driver) {
- return -EBUSY;
- }
-
- /* hook up the driver */
- dev->driver = driver;
- dev->gadget.dev.driver = &driver->driver;
-
- retval = driver->bind(&dev->gadget);
- if (retval) {
- DEBUG("%s: bind to driver %s --> error %d\n", dev->gadget.name,
- driver->driver.name, retval);
- dev->driver = 0;
- return retval;
- }
-
- /* then enable host detection and ep0; and we're ready
- * for set_configuration as well as eventual disconnect.
- */
- udc_enable(dev);
-
- DEBUG("%s: registered gadget driver '%s'\n", dev->gadget.name,
- driver->driver.name);
-
- return 0;
-}
-
-EXPORT_SYMBOL(usb_gadget_register_driver);
-
-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_set_index(dev, ep_index(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.
- */
-int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
-{
- struct jz4740_udc *dev = the_controller;
- unsigned long flags;
- DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
-
- if (!dev)
- return -ENODEV;
- if (!driver || driver != dev->driver)
- return -EINVAL;
- if (!driver->unbind)
- return -EBUSY;
-
- spin_lock_irqsave(&dev->lock, flags);
- dev->driver = 0;
- stop_activity(dev, driver);
- spin_unlock_irqrestore(&dev->lock, flags);
-
- driver->unbind(&dev->gadget);
-
- udc_disable(dev);
-
- DEBUG("unregistered driver '%s'\n", driver->driver.name);
-
- return 0;
-}
-
-EXPORT_SYMBOL(usb_gadget_unregister_driver);
-
-/*-------------------------------------------------------------------------*/
-
-/*
- * Starting DMA using mode 1
- */
-static void kick_dma(struct jz4740_ep *ep, struct jz4740_request *req)
-{
- struct jz4740_udc *dev = ep->dev;
- uint32_t count = req->req.length;
- uint32_t physaddr = virt_to_phys((void *)req->req.buf);
-
- DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
-
- jz_udc_select_ep(ep);
-
- if (ep_is_in(ep)) { /* Bulk-IN transfer using DMA channel 1 */
- ep->reg_addr = JZ_REG_UDC_ADDR1;
-
- dma_cache_wback_inv((unsigned long)req->req.buf, count);
-
- pio_irq_enable(ep);
-
- usb_writeb(dev, JZ_REG_UDC_INCSRH,
- USB_INCSRH_DMAREQENAB | USB_INCSRH_AUTOSET | USB_INCSRH_DMAREQMODE);
-
- usb_writel(dev, JZ_REG_UDC_ADDR1, physaddr);
- usb_writel(dev, JZ_REG_UDC_COUNT1, count);
- usb_writel(dev, JZ_REG_UDC_CNTL1, USB_CNTL_ENA | USB_CNTL_DIR_IN | USB_CNTL_MODE_1 |
- USB_CNTL_INTR_EN | USB_CNTL_BURST_16 | USB_CNTL_EP(ep_index(ep)));
- }
- else { /* Bulk-OUT transfer using DMA channel 2 */
- ep->reg_addr = JZ_REG_UDC_ADDR2;
-
- dma_cache_wback_inv((unsigned long)req->req.buf, count);
-
- pio_irq_enable(ep);
-
- usb_setb(dev, JZ_REG_UDC_OUTCSRH,
- USB_OUTCSRH_DMAREQENAB | USB_OUTCSRH_AUTOCLR | USB_OUTCSRH_DMAREQMODE);
-
- usb_writel(dev, JZ_REG_UDC_ADDR2, physaddr);
- usb_writel(dev, JZ_REG_UDC_COUNT2, count);
- usb_writel(dev, JZ_REG_UDC_CNTL2, USB_CNTL_ENA | USB_CNTL_MODE_1 |
- USB_CNTL_INTR_EN | USB_CNTL_BURST_16 | USB_CNTL_EP(ep_index(ep)));
- }
-}
-
-/*-------------------------------------------------------------------------*/
-
-/** 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;
- uint32_t physaddr = virt_to_phys((void *)req->req.buf);
-
- DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
- max = le16_to_cpu(ep->desc->wMaxPacketSize);
-
- if (use_dma) {
- uint32_t dma_count;
-
- /* DMA interrupt generated due to the last packet loaded into the FIFO */
-
- dma_count = usb_readl(dev, ep->reg_addr) - physaddr;
- req->req.actual += dma_count;
-
- if (dma_count % max) {
- /* If the last packet is less than MAXP, set INPKTRDY manually */
- usb_setb(dev, ep->csr, USB_INCSR_INPKTRDY);
- }
-
- done(ep, req, 0);
- if (list_empty(&ep->queue)) {
- pio_irq_disable(ep);
- return 1;
- }
- else {
- /* advance the request queue */
- req = list_entry(ep->queue.next, struct jz4740_request, queue);
- kick_dma(ep, req);
- return 0;
- }
- }
-
- /*
- * PIO mode handling starts here ...
- */
-
- 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;
- uint32_t physaddr = virt_to_phys((void *)req->req.buf);
-
- if (use_dma) {
- uint32_t dma_count;
-
- /* DMA interrupt generated due to a packet less than MAXP loaded into the FIFO */
-
- dma_count = usb_readl(dev, ep->reg_addr) - physaddr;
- req->req.actual += dma_count;
-
- /* Disable interrupt and DMA */
- pio_irq_disable(ep);
- usb_writel(dev, JZ_REG_UDC_CNTL2, 0);
-
- /* Read all bytes from this packet */
- count = usb_readw(dev, JZ_REG_UDC_OUTCOUNT);
- count = read_packet(ep, req, count);
-
- if (count) {
- /* If the last packet is greater than zero, clear OUTPKTRDY manually */
- usb_clearb(dev, ep->csr, USB_OUTCSR_OUTPKTRDY);
- }
- done(ep, req, 0);
-
- if (!list_empty(&ep->queue)) {
- /* advance the request queue */
- req = list_entry(ep->queue.next, struct jz4740_request, queue);
- kick_dma(ep, req);
- }
-
- return 1;
- }
-
- /*
- * PIO mode handling starts here ...
- */
-
- /* 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;
- unsigned long flags;
- 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) */
- spin_lock_irqsave(&ep->dev->lock, flags);
- index = usb_readb(ep->dev, JZ_REG_UDC_INDEX);
-
- req->req.complete(&ep->ep, &req->req);
-
- /* Restore index */
- jz_udc_set_index(ep->dev, index);
- spin_unlock_irqrestore(&ep->dev->lock, flags);
- ep->stopped = stopped;
-}
-
-/** Enable EP interrupt */
-static void pio_irq_enable(struct jz4740_ep *ep)
-{
- uint8_t index = ep_index(ep);
- struct jz4740_udc *dev = ep->dev;
- DEBUG("%s: EP%d %s\n", __FUNCTION__, ep_index(ep), ep_is_in(ep) ? "IN": "OUT");
-
- if (ep_is_in(ep)) {
- switch (index) {
- case 1:
- case 2:
- usb_setw(dev, JZ_REG_UDC_INTRINE, BIT(index));
- dev->in_mask |= BIT(index);
- break;
- default:
- DEBUG("Unknown endpoint: %d\n", index);
- break;
- }
- }
- else {
- switch (index) {
- case 1:
- usb_setw(dev, JZ_REG_UDC_INTROUTE, BIT(index));
- dev->out_mask |= BIT(index);
- break;
- default:
- DEBUG("Unknown endpoint: %d\n", index);
- break;
- }
- }
-}
-
-/** Disable EP interrupt */
-static void pio_irq_disable(struct jz4740_ep *ep)
-{
- uint8_t index = ep_index(ep);
- struct jz4740_udc *dev = ep->dev;
-
- DEBUG("%s: EP%d %s\n", __FUNCTION__, ep_index(ep), ep_is_in(ep) ? "IN": "OUT");
-
- if (ep_is_in(ep)) {
- switch (ep_index(ep)) {
- case 1:
- case 2:
- usb_clearw(ep->dev, JZ_REG_UDC_INTRINE, BIT(index));
- dev->in_mask &= ~BIT(index);
- break;
- default:
- DEBUG("Unknown endpoint: %d\n", index);
- break;
- }
- }
- else {
- switch (ep_index(ep)) {
- case 1:
- usb_clearw(ep->dev, JZ_REG_UDC_INTROUTE, BIT(index));
- dev->out_mask &= ~BIT(index);
- break;
- default:
- DEBUG("Unknown endpoint: %d\n", index);
- break;
- }
- }
-}
-
-/*
- * 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_set_index(dev, ep_index(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 = 0;
- else
- req = list_entry(ep->queue.next, struct jz4740_request, queue);
-
- DEBUG("req: %p\n", req);
-
- if (!req)
- return;
-
- 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_set_index(dev, ep_index(ep));
- if (ep->desc) {
- uint32_t csr;
-
- if (use_dma) {
- /* DMA starts here ... */
- if (list_empty(&ep->queue))
- req = 0;
- else
- req = list_entry(ep->queue.next, struct jz4740_request, queue);
-
- if (req)
- read_fifo(ep, req);
- return;
- }
-
- /*
- * PIO mode starts here ...
- */
-
- 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\92t 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);
- }
- }
-
- if (value) {
- ep->stopped = 1;
- } else {
- ep->stopped = 0;
- }
-
- 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_set_index(dev, desc->bEndpointAddress & 0x0F);
- 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->pio_irqs = 0;
- 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;
-
- DEBUG("%s, %p\n", __FUNCTION__, ep);
-
- req = kzalloc(sizeof(*req), gfp_flags);
- if (!req)
- return 0;
-
- 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;
-
- DEBUG("%s, %p\n", __FUNCTION__, ep);
-
- 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;
- unsigned long flags;
-
- 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, 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 (use_dma) {
- /* DMA */
- kick_dma(ep, req);
- }
- /* PIO */
- else if (ep_is_in(ep)) {
- /* EP1 & EP2 */
- jz_udc_set_index(dev, ep_index(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_set_index(dev, ep_index(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, 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_set_index(ep->dev, ep_index(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_set_index(ep->dev, ep_index(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);
-
- dev->usb_address = 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_set_index(dev, ep_index(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__, dev->usb_address,
- (dev->gadget.speed == USB_SPEED_HIGH) ? "HIGH":"FULL" );
-}
-
-/*
- * jz4740 usb device interrupt handler.
- */
-static irqreturn_t jz4740_udc_irq(int irq, void *_dev)
-{
- struct jz4740_udc *dev = _dev;
- uint8_t index;
-
- uint32_t intr_usb = usb_readb(dev, JZ_REG_UDC_INTRUSB) & 0x7; /* mask SOF */
- uint32_t intr_in = usb_readw(dev, JZ_REG_UDC_INTRIN);
- uint32_t intr_out = usb_readw(dev, JZ_REG_UDC_INTROUT);
- uint32_t intr_dma = usb_readb(dev, 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(&dev->lock);
- index = usb_readb(dev, JZ_REG_UDC_INDEX);
-
- /* Check for resume from suspend mode */
- if ((intr_usb & USB_INTR_RESUME) &&
- (usb_readb(dev, JZ_REG_UDC_INTRUSBE) & USB_INTR_RESUME)) {
- DEBUG("USB resume\n");
- dev->driver->resume(&dev->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(dev);
- }
-
- /* Check for endpoint 0 interrupt */
- if (intr_in & USB_INTR_EP0) {
- DEBUG("USB_INTR_EP0 (control)\n");
- jz4740_handle_ep0(dev, intr_in);
- }
-
- /* Check for Bulk-IN DMA interrupt */
- if (intr_dma & 0x1) {
- int ep_num;
- struct jz4740_ep *ep;
- ep_num = (usb_readl(dev, JZ_REG_UDC_CNTL1) >> 4) & 0xf;
- ep = &dev->ep[ep_num + 1];
- jz_udc_set_index(dev, ep_num);
- usb_setb(dev, ep->csr, USB_INCSR_INPKTRDY);
-/* jz4740_in_epn(dev, ep_num, intr_in);*/
- }
-
- /* Check for Bulk-OUT DMA interrupt */
- if (intr_dma & 0x2) {
- int ep_num;
- ep_num = (usb_readl(dev, JZ_REG_UDC_CNTL2) >> 4) & 0xf;
- jz4740_out_epn(dev, ep_num, intr_out);
- }
-
- /* Check for each configured endpoint interrupt */
- if (intr_in & USB_INTR_INEP1) {
- DEBUG("USB_INTR_INEP1\n");
- jz4740_in_epn(dev, 1, intr_in);
- }
-
- if (intr_in & USB_INTR_INEP2) {
- DEBUG("USB_INTR_INEP2\n");
- jz4740_in_epn(dev, 2, intr_in);
- }
-
- if (intr_out & USB_INTR_OUTEP1) {
- DEBUG("USB_INTR_OUTEP1\n");
- jz4740_out_epn(dev, 1, intr_out);
- }
-
- /* Check for suspend mode */
- if ((intr_usb & USB_INTR_SUSPEND) &&
- (usb_readb(dev, JZ_REG_UDC_INTRUSBE) & USB_INTR_SUSPEND)) {
- DEBUG("USB suspend\n");
- dev->driver->suspend(&dev->gadget);
- /* Host unloaded from us, can do something, such as flushing
- the NAND block cache etc. */
- }
-
- jz_udc_set_index(dev, index);
-
- spin_unlock(&dev->lock);
-
- return IRQ_HANDLED;
-}
-
-
-
-/*-------------------------------------------------------------------------*/
-
-/* Common functions - Added by River */
-static struct jz4740_udc udc_dev;
-
-static inline struct jz4740_udc *gadget_to_udc(struct usb_gadget *gadget)
-{
- return container_of(gadget, struct jz4740_udc, gadget);
-}
-/* End added */
-
-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,
- /* current versions must always be self-powered */
-};
-
-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 udc_dev = {
- .usb_address = 0,
- .gadget = {
- .ops = &jz4740_udc_ops,
- .ep0 = &udc_dev.ep[0].ep,
- .name = "jz-udc",
- .dev = {
- .init_name = "gadget",
- },
- },
-
- /* control endpoint */
- .ep[0] = {
- .ep = {
- .name = "ep0",
- .ops = &jz4740_ep_ops,
- .maxpacket = EP0_MAXPACKETSIZE,
- },
- .dev = &udc_dev,
-
- .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 = &udc_dev,
-
- .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 = &udc_dev,
-
- .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 = &udc_dev,
-
- .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 void gadget_release(struct device *_dev)
-{
-}
-
-
-static int jz4740_udc_probe(struct platform_device *pdev)
-{
- struct jz4740_udc *dev = &udc_dev;
- int ret;
-
- spin_lock_init(&dev->lock);
- the_controller = dev;
-
- dev->dev = &pdev->dev;
- dev_set_name(&dev->gadget.dev, "gadget");
- dev->gadget.dev.parent = &pdev->dev;
- dev->gadget.dev.dma_mask = pdev->dev.dma_mask;
- dev->gadget.dev.release = gadget_release;
-
- ret = device_register(&dev->gadget.dev);
- if (ret)
- return ret;
-
- dev->clk = clk_get(&pdev->dev, "udc");
- if (IS_ERR(dev->clk)) {
- ret = PTR_ERR(dev->clk);
- dev_err(&pdev->dev, "Failed to get udc clock: %d\n", ret);
- goto err_device_unregister;
- }
-
- platform_set_drvdata(pdev, dev);
-
- dev->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
- if (!dev->mem) {
- ret = -ENOENT;
- dev_err(&pdev->dev, "Failed to get mmio memory resource\n");
- goto err_clk_put;
- }
-
- dev->mem = request_mem_region(dev->mem->start, resource_size(dev->mem), pdev->name);
-
- if (!dev->mem) {
- ret = -EBUSY;
- dev_err(&pdev->dev, "Failed to request mmio memory region\n");
- goto err_device_unregister;
- }
-
- dev->base = ioremap(dev->mem->start, resource_size(dev->mem));
-
- if (!dev->base) {
- ret = -EBUSY;
- dev_err(&pdev->dev, "Failed to ioremap mmio memory\n");
- goto err_release_mem_region;
- }
-
- dev->irq = platform_get_irq(pdev, 0);
-
- ret = request_irq(dev->irq, jz4740_udc_irq, IRQF_DISABLED,
- pdev->name, dev);
- if (ret) {
- dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
- goto err_iounmap;
- }
-
- udc_disable(dev);
- udc_reinit(dev);
-
- return 0;
-
-err_iounmap:
- iounmap(dev->base);
-err_release_mem_region:
- release_mem_region(dev->mem->start, resource_size(dev->mem));
-err_clk_put:
- clk_put(dev->clk);
-err_device_unregister:
- device_unregister(&dev->gadget.dev);
- platform_set_drvdata(pdev, NULL);
-
- the_controller = 0;
-
- return ret;
-}
-
-static int jz4740_udc_remove(struct platform_device *pdev)
-{
- struct jz4740_udc *dev = platform_get_drvdata(pdev);
-
- 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);
- device_unregister(&dev->gadget.dev);
- the_controller = NULL;
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-
-static int jz4740_udc_suspend(struct device *dev)
-{
- struct jz4740_udc *udc = dev_get_drvdata(dev);
-
- if (udc->state == UDC_STATE_ENABLE)
- udc_disable(udc);
-
- return 0;
-}
-
-static int jz4740_udc_resume(struct device *dev)
-{
- struct jz4740_udc *udc = dev_get_drvdata(dev);
-
- if (udc->state == UDC_STATE_ENABLE)
- udc_enable(udc);
-
- return 0;
-}
-
-static struct dev_pm_ops jz4740_udc_pm_ops = {
- .suspend = jz4740_udc_suspend,
- .resume = 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");
projects / openwrt / svn-archive / archive.git / blobdiff