--- /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