diff options
Diffstat (limited to 'target/linux/xburst/patches-2.6.37/200-udc.patch')
| -rw-r--r-- | target/linux/xburst/patches-2.6.37/200-udc.patch | 2563 |
1 files changed, 2563 insertions, 0 deletions
diff --git a/target/linux/xburst/patches-2.6.37/200-udc.patch b/target/linux/xburst/patches-2.6.37/200-udc.patch new file mode 100644 index 000000000..e2a170248 --- /dev/null +++ b/target/linux/xburst/patches-2.6.37/200-udc.patch @@ -0,0 +1,2563 @@ +From f39709ba061049463b1a607369e476512da9ec5b Mon Sep 17 00:00:00 2001 +From: Lars-Peter Clausen <lars@metafoo.de> +Date: Sat, 24 Apr 2010 12:18:46 +0200 +Subject: [PATCH 02/23] Add jz4740 udc driver + +--- + drivers/usb/gadget/Kconfig | 14 + + drivers/usb/gadget/Makefile | 1 + + drivers/usb/gadget/gadget_chips.h | 9 + + drivers/usb/gadget/jz4740_udc.c | 2378 +++++++++++++++++++++++++++++++++++++ + drivers/usb/gadget/jz4740_udc.h | 101 ++ + 5 files changed, 2503 insertions(+), 0 deletions(-) + create mode 100644 drivers/usb/gadget/jz4740_udc.c + create mode 100644 drivers/usb/gadget/jz4740_udc.h + +--- a/drivers/usb/gadget/Kconfig ++++ b/drivers/usb/gadget/Kconfig +@@ -121,11 +121,25 @@ choice + # + # Integrated controllers + # ++config USB_GADGET_JZ4740 ++ boolean "JZ4740 UDC" ++ depends on MACH_JZ4740 ++ select USB_GADGET_SELECTED ++ select USB_GADGET_DUALSPEED ++ help ++ Select this to support the Ingenic JZ4740 processor ++ high speed USB device controller. ++ ++config USB_JZ4740 ++ tristate ++ depends on USB_GADGET_JZ4740 ++ default USB_GADGET + + config USB_GADGET_AT91 + boolean "Atmel AT91 USB Device Port" + depends on ARCH_AT91 && !ARCH_AT91SAM9RL && !ARCH_AT91CAP9 && !ARCH_AT91SAM9G45 + select USB_GADGET_SELECTED ++ + help + Many Atmel AT91 processors (such as the AT91RM2000) have a + full speed USB Device Port with support for five configurable +--- a/drivers/usb/gadget/Makefile ++++ b/drivers/usb/gadget/Makefile +@@ -24,6 +24,7 @@ obj-$(CONFIG_USB_FSL_QE) += fsl_qe_udc.o + obj-$(CONFIG_USB_CI13XXX) += ci13xxx_udc.o + obj-$(CONFIG_USB_S3C_HSOTG) += s3c-hsotg.o + obj-$(CONFIG_USB_LANGWELL) += langwell_udc.o ++obj-$(CONFIG_USB_JZ4740) += jz4740_udc.o + + # + # USB gadget drivers +--- a/drivers/usb/gadget/gadget_chips.h ++++ b/drivers/usb/gadget/gadget_chips.h +@@ -15,6 +15,12 @@ + #ifndef __GADGET_CHIPS_H + #define __GADGET_CHIPS_H + ++#ifdef CONFIG_USB_GADGET_JZ4740 ++#define gadget_is_jz4740(g) !strcmp("ingenic_hsusb", (g)->name) ++#else ++#define gadget_is_jz4740(g) 0 ++#endif ++ + #ifdef CONFIG_USB_GADGET_NET2280 + #define gadget_is_net2280(g) !strcmp("net2280", (g)->name) + #else +@@ -200,6 +206,9 @@ static inline int usb_gadget_controller_ + return 0x25; + else if (gadget_is_s3c_hsotg(gadget)) + return 0x26; ++ else if (gadget_is_jz4740(gadget)) ++ return 0x27; ++ + return -ENOENT; + } + +--- /dev/null ++++ b/drivers/usb/gadget/jz4740_udc.c +@@ -0,0 +1,2378 @@ ++/* ++ * 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/clock.h> ++ ++#include "jz4740_udc.h" ++ ++#define JZ_REG_UDC_FADDR 0x00 /* Function Address 8-bit */ ++#define JZ_REG_UDC_POWER 0x01 /* Power Management 8-bit */ ++#define JZ_REG_UDC_INTRIN 0x02 /* Interrupt IN 16-bit */ ++#define JZ_REG_UDC_INTROUT 0x04 /* Interrupt OUT 16-bit */ ++#define JZ_REG_UDC_INTRINE 0x06 /* Intr IN enable 16-bit */ ++#define JZ_REG_UDC_INTROUTE 0x08 /* Intr OUT enable 16-bit */ ++#define JZ_REG_UDC_INTRUSB 0x0a /* Interrupt USB 8-bit */ ++#define JZ_REG_UDC_INTRUSBE 0x0b /* Interrupt USB Enable 8-bit */ ++#define JZ_REG_UDC_FRAME 0x0c /* Frame number 16-bit */ ++#define JZ_REG_UDC_INDEX 0x0e /* Index register 8-bit */ ++#define JZ_REG_UDC_TESTMODE 0x0f /* USB test mode 8-bit */ ++ ++#define JZ_REG_UDC_CSR0 0x12 /* EP0 CSR 8-bit */ ++#define JZ_REG_UDC_INMAXP 0x10 /* EP1-2 IN Max Pkt Size 16-bit */ ++#define JZ_REG_UDC_INCSR 0x12 /* EP1-2 IN CSR LSB 8/16bit */ ++#define JZ_REG_UDC_INCSRH 0x13 /* EP1-2 IN CSR MSB 8-bit */ ++#define JZ_REG_UDC_OUTMAXP 0x14 /* EP1 OUT Max Pkt Size 16-bit */ ++#define JZ_REG_UDC_OUTCSR 0x16 /* EP1 OUT CSR LSB 8/16bit */ ++#define JZ_REG_UDC_OUTCSRH 0x17 /* EP1 OUT CSR MSB 8-bit */ ++#define JZ_REG_UDC_OUTCOUNT 0x18 /* bytes in EP0/1 OUT FIFO 16-bit */ ++ ++#define JZ_REG_UDC_EP_FIFO(x) (4 * (x) + 0x20) ++ ++#define JZ_REG_UDC_EPINFO 0x78 /* Endpoint information */ ++#define JZ_REG_UDC_RAMINFO 0x79 /* RAM information */ ++ ++#define JZ_REG_UDC_INTR 0x200 /* DMA pending interrupts */ ++#define JZ_REG_UDC_CNTL1 0x204 /* DMA channel 1 control */ ++#define JZ_REG_UDC_ADDR1 0x208 /* DMA channel 1 AHB memory addr */ ++#define JZ_REG_UDC_COUNT1 0x20c /* DMA channel 1 byte count */ ++#define JZ_REG_UDC_CNTL2 0x214 /* DMA channel 2 control */ ++#define JZ_REG_UDC_ADDR2 0x218 /* DMA channel 2 AHB memory addr */ ++#define JZ_REG_UDC_COUNT2 0x21c /* DMA channel 2 byte count */ ++ ++/* Power register bit masks */ ++#define USB_POWER_SUSPENDM 0x01 ++#define USB_POWER_RESUME 0x04 ++#define USB_POWER_HSMODE 0x10 ++#define USB_POWER_HSENAB 0x20 ++#define USB_POWER_SOFTCONN 0x40 ++ ++/* Interrupt register bit masks */ ++#define USB_INTR_SUSPEND 0x01 ++#define USB_INTR_RESUME 0x02 ++#define USB_INTR_RESET 0x04 ++ ++#define USB_INTR_EP0 0x0001 ++#define USB_INTR_INEP1 0x0002 ++#define USB_INTR_INEP2 0x0004 ++#define USB_INTR_OUTEP1 0x0002 ++ ++/* CSR0 bit masks */ ++#define USB_CSR0_OUTPKTRDY 0x01 ++#define USB_CSR0_INPKTRDY 0x02 ++#define USB_CSR0_SENTSTALL 0x04 ++#define USB_CSR0_DATAEND 0x08 ++#define USB_CSR0_SETUPEND 0x10 ++#define USB_CSR0_SENDSTALL 0x20 ++#define USB_CSR0_SVDOUTPKTRDY 0x40 ++#define USB_CSR0_SVDSETUPEND 0x80 ++ ++/* Endpoint CSR register bits */ ++#define USB_INCSRH_AUTOSET 0x80 ++#define USB_INCSRH_ISO 0x40 ++#define USB_INCSRH_MODE 0x20 ++#define USB_INCSRH_DMAREQENAB 0x10 ++#define USB_INCSRH_DMAREQMODE 0x04 ++#define USB_INCSR_CDT 0x40 ++#define USB_INCSR_SENTSTALL 0x20 ++#define USB_INCSR_SENDSTALL 0x10 ++#define USB_INCSR_FF 0x08 ++#define USB_INCSR_UNDERRUN 0x04 ++#define USB_INCSR_FFNOTEMPT 0x02 ++#define USB_INCSR_INPKTRDY 0x01 ++#define USB_OUTCSRH_AUTOCLR 0x80 ++#define USB_OUTCSRH_ISO 0x40 ++#define USB_OUTCSRH_DMAREQENAB 0x20 ++#define USB_OUTCSRH_DNYT 0x10 ++#define USB_OUTCSRH_DMAREQMODE 0x08 ++#define USB_OUTCSR_CDT 0x80 ++#define USB_OUTCSR_SENTSTALL 0x40 ++#define USB_OUTCSR_SENDSTALL 0x20 ++#define USB_OUTCSR_FF 0x10 ++#define USB_OUTCSR_DATAERR 0x08 ++#define USB_OUTCSR_OVERRUN 0x04 ++#define USB_OUTCSR_FFFULL 0x02 ++#define USB_OUTCSR_OUTPKTRDY 0x01 ++ ++/* DMA control bits */ ++#define USB_CNTL_ENA 0x01 ++#define USB_CNTL_DIR_IN 0x02 ++#define USB_CNTL_MODE_1 0x04 ++#define USB_CNTL_INTR_EN 0x08 ++#define USB_CNTL_EP(n) ((n) << 4) ++#define USB_CNTL_BURST_0 (0 << 9) ++#define USB_CNTL_BURST_4 (1 << 9) ++#define USB_CNTL_BURST_8 (2 << 9) ++#define USB_CNTL_BURST_16 (3 << 9) ++ ++ ++#ifndef DEBUG ++# define DEBUG(fmt,args...) do {} while(0) ++#endif ++#ifndef DEBUG_EP0 ++# define NO_STATES ++# define DEBUG_EP0(fmt,args...) do {} while(0) ++#endif ++#ifndef DEBUG_SETUP ++# define DEBUG_SETUP(fmt,args...) do {} while(0) ++#endif ++ ++static 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"); ++ ++static struct jz4740_udc jz4740_udc_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_clearb(struct jz4740_udc *udc, size_t reg, uint8_t mask) ++{ ++ usb_writeb(udc, reg, usb_readb(udc, reg) & ~mask); ++} ++ ++static inline void usb_clearw(struct jz4740_udc *udc, size_t reg, uint16_t mask) ++{ ++ usb_writew(udc, reg, usb_readw(udc, reg) & ~mask); ++} ++ ++/*-------------------------------------------------------------------------*/ ++ ++static inline void jz_udc_set_index(struct jz4740_udc *udc, uint8_t index) ++{ ++ usb_writeb(udc, JZ_REG_UDC_INDEX, index); ++} ++ ++static inline void jz_udc_select_ep(struct jz4740_ep *ep) ++{ ++ jz_udc_set_index(ep->dev, ep_index(ep)); ++} ++ ++static inline int write_packet(struct jz4740_ep *ep, ++ struct jz4740_request *req, unsigned int count) ++{ ++ uint8_t *buf; ++ unsigned int length, nlong, nbyte; ++ void __iomem *fifo = ep->dev->base + ep->fifo; ++ ++ DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__); ++ ++ buf = req->req.buf + req->req.actual; ++ prefetch(buf); ++ ++ length = req->req.length - req->req.actual; ++ if (length > count) ++ length = count; ++ req->req.actual += length; ++ ++ DEBUG("Write %d (count %d), fifo %x\n", length, count, ep->fifo); ++ ++ nlong = length >> 2; ++ nbyte = length & 0x3; ++ while (nlong--) { ++ writel(*((uint32_t *)buf), fifo); ++ buf += 4; ++ } ++ while (nbyte--) ++ writeb(*buf++, fifo); ++ ++ return length; ++} ++ ++static int read_packet(struct jz4740_ep *ep, ++ struct jz4740_request *req, unsigned int count) ++{ ++ uint8_t *buf; ++ unsigned int length, nlong, nbyte; ++ void __iomem *fifo = ep->dev->base + ep->fifo; ++ DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__); ++ ++ buf = req->req.buf + req->req.actual; ++ prefetchw(buf); ++ ++ length = req->req.length - req->req.actual; ++ if (length > count) ++ length = count; ++ req->req.actual += length; ++ ++ DEBUG("Read %d, fifo %x\n", length, ep->fifo); ++ nlong = length >> 2; ++ nbyte = length & 0x3; ++ while (nlong--) { ++ *((uint32_t *)buf) = readl(fifo); ++ buf += 4; ++ } ++ while (nbyte--) ++ *buf++ = readb(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; ++ } ++} ++ ++/* 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_probe_driver(struct usb_gadget_driver *driver, ++ int (*bind)(struct usb_gadget *)) ++{ ++ struct jz4740_udc *dev = &jz4740_udc_controller; ++ int retval; ++ ++ if (!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 = 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_probe_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 = &jz4740_udc_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; ++ ++#if 0 ++ 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; ++ } ++#endif ++ /* ++ * 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; ++ uint32_t index; ++ ++ DEBUG("%s, %p\n", __FUNCTION__, ep); ++ list_del_init(&req->queue); ++ ++ if (likely(req->req.status == -EINPROGRESS)) ++ req->req.status = status; ++ else ++ status = req->req.status; ++ ++ if (status && status != -ESHUTDOWN) ++ DEBUG("complete %s req %p stat %d len %u/%u\n", ++ ep->ep.name, &req->req, status, ++ req->req.actual, req->req.length); ++ ++ /* don't modify queue heads during completion callback */ ++ ep->stopped = 1; ++ /* Read current index (completion may modify it) */ ++ index = usb_readb(ep->dev, JZ_REG_UDC_INDEX); ++ spin_unlock_irqrestore(&ep->dev->lock, ep->dev->lock_flags); ++ ++ req->req.complete(&ep->ep, &req->req); ++ ++ spin_lock_irqsave(&ep->dev->lock, ep->dev->lock_flags); ++ /* Restore index */ ++ jz_udc_set_index(ep->dev, index); ++ ep->stopped = stopped; ++} ++ ++/** 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)); ++ break; ++ default: ++ DEBUG("Unknown endpoint: %d\n", index); ++ break; ++ } ++ } ++ else { ++ switch (index) { ++ case 1: ++ usb_setw(dev, JZ_REG_UDC_INTROUTE, 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); ++ ++ 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)); ++ 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)); ++ 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 = list_first_entry(&ep->queue, struct jz4740_request, queue); ++ write_fifo(ep, req); ++ } ++} ++ ++/* ++ * Bulk OUT (recv) ++ */ ++static void jz4740_out_epn(struct jz4740_udc *dev, uint32_t ep_idx, uint32_t intr) ++{ ++ struct jz4740_ep *ep = &dev->ep[ep_idx]; ++ struct jz4740_request *req; ++ ++ DEBUG("%s: %d\n", __FUNCTION__, ep_idx); ++ ++ jz_udc_select_ep(ep); ++ if (ep->desc) { ++ uint32_t csr; ++ ++ if (use_dma) { ++ /* DMA starts here ... */ ++ if (!list_empty(&ep->queue)) { ++ req = list_first_entry(&ep->queue, struct jz4740_request, queue); ++ 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 hasnt collected. ++ */ ++ spin_unlock_irqrestore(&dev->lock, flags); ++ DEBUG ++ ("Attempt to halt IN endpoint failed (returning -EAGAIN) %d %d\n", ++ (csr & USB_INCSR_FFNOTEMPT), ++ !list_empty(&ep->queue)); ++ return -EAGAIN; ++ } ++ flush(ep); ++ if (value) { ++ usb_setb(dev, ep->csr, USB_INCSR_SENDSTALL); ++ } else { ++ usb_clearb(dev, ep->csr, USB_INCSR_SENDSTALL); ++ usb_setb(dev, ep->csr, USB_INCSR_CDT); ++ } ++ } else { ++ ++ flush(ep); ++ if (value) { ++ usb_setb(dev, ep->csr, USB_OUTCSR_SENDSTALL); ++ } else { ++ usb_clearb(dev, ep->csr, USB_OUTCSR_SENDSTALL); ++ usb_setb(dev, ep->csr, USB_OUTCSR_CDT); ++ } ++ } ++ ++ ep->stopped = value; ++ ++ spin_unlock_irqrestore(&dev->lock, flags); ++ ++ DEBUG("%s %s halted\n", _ep->name, value == 0 ? "NOT" : "IS"); ++ ++ return 0; ++} ++ ++ ++static int jz4740_ep_enable(struct usb_ep *_ep, ++ const struct usb_endpoint_descriptor *desc) ++{ ++ struct jz4740_ep *ep; ++ struct jz4740_udc *dev; ++ unsigned long flags; ++ uint32_t max, csrh = 0; ++ ++ DEBUG("%s: trying to enable %s\n", __FUNCTION__, _ep->name); ++ ++ if (!_ep || !desc) ++ return -EINVAL; ++ ++ ep = container_of(_ep, struct jz4740_ep, ep); ++ if (ep->desc || ep->type == ep_control ++ || desc->bDescriptorType != USB_DT_ENDPOINT ++ || ep->bEndpointAddress != desc->bEndpointAddress) { ++ DEBUG("%s, bad ep or descriptor\n", __FUNCTION__); ++ return -EINVAL; ++ } ++ ++ /* xfer types must match, except that interrupt ~= bulk */ ++ if (ep->bmAttributes != desc->bmAttributes ++ && ep->bmAttributes != USB_ENDPOINT_XFER_BULK ++ && desc->bmAttributes != USB_ENDPOINT_XFER_INT) { ++ DEBUG("%s, %s type mismatch\n", __FUNCTION__, _ep->name); ++ return -EINVAL; ++ } ++ ++ dev = ep->dev; ++ if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) { ++ DEBUG("%s, bogus device state\n", __FUNCTION__); ++ return -ESHUTDOWN; ++ } ++ ++ max = le16_to_cpu(desc->wMaxPacketSize); ++ ++ spin_lock_irqsave(&ep->dev->lock, flags); ++ ++ /* Configure the endpoint */ ++ jz_udc_select_ep(ep); ++ if (ep_is_in(ep)) { ++ usb_writew(dev, JZ_REG_UDC_INMAXP, max); ++ switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { ++ case USB_ENDPOINT_XFER_BULK: ++ case USB_ENDPOINT_XFER_INT: ++ csrh &= ~USB_INCSRH_ISO; ++ break; ++ case USB_ENDPOINT_XFER_ISOC: ++ csrh |= USB_INCSRH_ISO; ++ break; ++ } ++ usb_writeb(dev, JZ_REG_UDC_INCSRH, csrh); ++ } ++ else { ++ usb_writew(dev, JZ_REG_UDC_OUTMAXP, max); ++ switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) { ++ case USB_ENDPOINT_XFER_BULK: ++ csrh &= ~USB_OUTCSRH_ISO; ++ break; ++ case USB_ENDPOINT_XFER_INT: ++ csrh &= ~USB_OUTCSRH_ISO; ++ csrh |= USB_OUTCSRH_DNYT; ++ break; ++ case USB_ENDPOINT_XFER_ISOC: ++ csrh |= USB_OUTCSRH_ISO; ++ break; ++ } ++ usb_writeb(dev, JZ_REG_UDC_OUTCSRH, csrh); ++ } ++ ++ ++ ep->stopped = 0; ++ ep->desc = desc; ++ ep->ep.maxpacket = max; ++ ++ spin_unlock_irqrestore(&ep->dev->lock, flags); ++ ++ /* Reset halt state (does flush) */ ++ jz4740_set_halt(_ep, 0); ++ ++ DEBUG("%s: enabled %s\n", __FUNCTION__, _ep->name); ++ ++ return 0; ++} ++ ++/** Disable EP ++ * NOTE: Sets INDEX register ++ */ ++static int jz4740_ep_disable(struct usb_ep *_ep) ++{ ++ struct jz4740_ep *ep; ++ unsigned long flags; ++ ++ DEBUG("%s, %p\n", __FUNCTION__, _ep); ++ ++ ep = container_of(_ep, struct jz4740_ep, ep); ++ if (!_ep || !ep->desc) { ++ DEBUG("%s, %s not enabled\n", __FUNCTION__, ++ _ep ? ep->ep.name : NULL); ++ return -EINVAL; ++ } ++ ++ spin_lock_irqsave(&ep->dev->lock, flags); ++ ++ jz_udc_select_ep(ep); ++ ++ /* Nuke all pending requests (does flush) */ ++ nuke(ep, -ESHUTDOWN); ++ ++ /* Disable ep IRQ */ ++ pio_irq_disable(ep); ++ ++ ep->desc = 0; ++ ep->stopped = 1; ++ ++ spin_unlock_irqrestore(&ep->dev->lock, flags); ++ ++ DEBUG("%s: disabled %s\n", __FUNCTION__, _ep->name); ++ return 0; ++} ++ ++static struct usb_request *jz4740_alloc_request(struct usb_ep *ep, gfp_t gfp_flags) ++{ ++ struct jz4740_request *req; ++ ++ req = kzalloc(sizeof(*req), gfp_flags); ++ if (!req) ++ return NULL; ++ ++ INIT_LIST_HEAD(&req->queue); ++ ++ return &req->req; ++} ++ ++static void jz4740_free_request(struct usb_ep *ep, struct usb_request *_req) ++{ ++ struct jz4740_request *req; ++ ++ 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; ++ ++ DEBUG("%s, %p\n", __FUNCTION__, _ep); ++ ++ req = container_of(_req, struct jz4740_request, req); ++ if (unlikely ++ (!_req || !_req->complete || !_req->buf ++ || !list_empty(&req->queue))) { ++ DEBUG("%s, bad params\n", __FUNCTION__); ++ return -EINVAL; ++ } ++ ++ ep = container_of(_ep, struct jz4740_ep, ep); ++ if (unlikely(!_ep || (!ep->desc && ep->type != ep_control))) { ++ DEBUG("%s, bad ep\n", __FUNCTION__); ++ return -EINVAL; ++ } ++ ++ dev = ep->dev; ++ if (unlikely(!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)) { ++ DEBUG("%s, bogus device state %p\n", __FUNCTION__, dev->driver); ++ return -ESHUTDOWN; ++ } ++ ++ DEBUG("%s queue req %p, len %d buf %p\n", _ep->name, _req, _req->length, ++ _req->buf); ++ ++ spin_lock_irqsave(&dev->lock, dev->lock_flags); ++ ++ _req->status = -EINPROGRESS; ++ _req->actual = 0; ++ ++ /* kickstart this i/o queue? */ ++ DEBUG("Add to %d Q %d %d\n", ep_index(ep), list_empty(&ep->queue), ++ ep->stopped); ++ if (list_empty(&ep->queue) && likely(!ep->stopped)) { ++ uint32_t csr; ++ ++ if (unlikely(ep_index(ep) == 0)) { ++ /* EP0 */ ++ list_add_tail(&req->queue, &ep->queue); ++ jz4740_ep0_kick(dev, ep); ++ req = 0; ++ } else if (use_dma) { ++ /* DMA */ ++ kick_dma(ep, req); ++ } ++ /* PIO */ ++ else if (ep_is_in(ep)) { ++ /* EP1 & EP2 */ ++ jz_udc_select_ep(ep); ++ csr = usb_readb(dev, ep->csr); ++ pio_irq_enable(ep); ++ if (!(csr & USB_INCSR_FFNOTEMPT)) { ++ if (write_fifo(ep, req) == 1) ++ req = 0; ++ } ++ } else { ++ /* EP1 */ ++ jz_udc_select_ep(ep); ++ csr = usb_readb(dev, ep->csr); ++ pio_irq_enable(ep); ++ if (csr & USB_OUTCSR_OUTPKTRDY) { ++ if (read_fifo(ep, req) == 1) ++ req = 0; ++ } ++ } ++ } ++ ++ /* pio or dma irq handler advances the queue. */ ++ if (likely(req != 0)) ++ list_add_tail(&req->queue, &ep->queue); ++ ++ spin_unlock_irqrestore(&dev->lock, dev->lock_flags); ++ ++ return 0; ++} ++ ++/* dequeue JUST ONE request */ ++static int jz4740_dequeue(struct usb_ep *_ep, struct usb_request *_req) ++{ ++ struct jz4740_ep *ep; ++ struct jz4740_request *req; ++ unsigned long flags; ++ ++ DEBUG("%s, %p\n", __FUNCTION__, _ep); ++ ++ ep = container_of(_ep, struct jz4740_ep, ep); ++ if (!_ep || ep->type == ep_control) ++ return -EINVAL; ++ ++ spin_lock_irqsave(&ep->dev->lock, flags); ++ ++ /* make sure it's actually queued on this endpoint */ ++ list_for_each_entry(req, &ep->queue, queue) { ++ if (&req->req == _req) ++ break; ++ } ++ if (&req->req != _req) { ++ spin_unlock_irqrestore(&ep->dev->lock, flags); ++ return -EINVAL; ++ } ++ done(ep, req, -ECONNRESET); ++ ++ spin_unlock_irqrestore(&ep->dev->lock, flags); ++ return 0; ++} ++ ++/** Return bytes in EP FIFO ++ * NOTE: Sets INDEX register to EP ++ */ ++static int jz4740_fifo_status(struct usb_ep *_ep) ++{ ++ uint32_t csr; ++ int count = 0; ++ struct jz4740_ep *ep; ++ unsigned long flags; ++ ++ ep = container_of(_ep, struct jz4740_ep, ep); ++ if (!_ep) { ++ DEBUG("%s, bad ep\n", __FUNCTION__); ++ return -ENODEV; ++ } ++ ++ DEBUG("%s, %d\n", __FUNCTION__, ep_index(ep)); ++ ++ /* LPD can't report unclaimed bytes from IN fifos */ ++ if (ep_is_in(ep)) ++ return -EOPNOTSUPP; ++ ++ spin_lock_irqsave(&ep->dev->lock, flags); ++ jz_udc_select_ep(ep); ++ ++ csr = usb_readb(ep->dev, ep->csr); ++ if (ep->dev->gadget.speed != USB_SPEED_UNKNOWN || ++ csr & 0x1) { ++ count = usb_readw(ep->dev, JZ_REG_UDC_OUTCOUNT); ++ } ++ ++ spin_unlock_irqrestore(&ep->dev->lock, flags); ++ ++ return count; ++} ++ ++/** Flush EP FIFO ++ * NOTE: Sets INDEX register to EP ++ */ ++static void jz4740_fifo_flush(struct usb_ep *_ep) ++{ ++ struct jz4740_ep *ep; ++ unsigned long flags; ++ ++ DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__); ++ ++ ep = container_of(_ep, struct jz4740_ep, ep); ++ if (unlikely(!_ep || (!ep->desc && ep->type == ep_control))) { ++ DEBUG("%s, bad ep\n", __FUNCTION__); ++ return; ++ } ++ ++ spin_lock_irqsave(&ep->dev->lock, flags); ++ ++ jz_udc_select_ep(ep); ++ flush(ep); ++ ++ spin_unlock_irqrestore(&ep->dev->lock, flags); ++} ++ ++/****************************************************************/ ++/* End Point 0 related functions */ ++/****************************************************************/ ++ ++/* return: 0 = still running, 1 = completed, negative = errno */ ++static int write_fifo_ep0(struct jz4740_ep *ep, struct jz4740_request *req) ++{ ++ uint32_t max; ++ unsigned count; ++ int is_last; ++ ++ DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__); ++ max = ep_maxpacket(ep); ++ ++ count = write_packet(ep, req, max); ++ ++ /* last packet is usually short (or a zlp) */ ++ if (unlikely(count != max)) ++ is_last = 1; ++ else { ++ if (likely(req->req.length != req->req.actual) || req->req.zero) ++ is_last = 0; ++ else ++ is_last = 1; ++ } ++ ++ DEBUG_EP0("%s: wrote %s %d bytes%s %d left %p\n", __FUNCTION__, ++ ep->ep.name, count, ++ is_last ? "/L" : "", req->req.length - req->req.actual, req); ++ ++ /* requests complete when all IN data is in the FIFO */ ++ if (is_last) { ++ done(ep, req, 0); ++ return 1; ++ } ++ ++ return 0; ++} ++ ++static inline int jz4740_fifo_read(struct jz4740_ep *ep, ++ unsigned char *cp, int max) ++{ ++ int bytes; ++ int count = usb_readw(ep->dev, JZ_REG_UDC_OUTCOUNT); ++ ++ if (count > max) ++ count = max; ++ bytes = count; ++ while (count--) ++ *cp++ = usb_readb(ep->dev, ep->fifo); ++ ++ return bytes; ++} ++ ++static inline void jz4740_fifo_write(struct jz4740_ep *ep, ++ unsigned char *cp, int count) ++{ ++ DEBUG("fifo_write: %d %d\n", ep_index(ep), count); ++ while (count--) ++ usb_writeb(ep->dev, ep->fifo, *cp++); ++} ++ ++static int read_fifo_ep0(struct jz4740_ep *ep, struct jz4740_request *req) ++{ ++ struct jz4740_udc *dev = ep->dev; ++ uint32_t csr; ++ uint8_t *buf; ++ unsigned bufferspace, count, is_short; ++ ++ DEBUG_EP0("%s\n", __FUNCTION__); ++ ++ csr = usb_readb(dev, JZ_REG_UDC_CSR0); ++ if (!(csr & USB_CSR0_OUTPKTRDY)) ++ return 0; ++ ++ buf = req->req.buf + req->req.actual; ++ prefetchw(buf); ++ bufferspace = req->req.length - req->req.actual; ++ ++ /* read all bytes from this packet */ ++ if (likely(csr & USB_CSR0_OUTPKTRDY)) { ++ count = usb_readw(dev, JZ_REG_UDC_OUTCOUNT); ++ req->req.actual += min(count, bufferspace); ++ } else /* zlp */ ++ count = 0; ++ ++ is_short = (count < ep->ep.maxpacket); ++ DEBUG_EP0("read %s %02x, %d bytes%s req %p %d/%d\n", ++ ep->ep.name, csr, count, ++ is_short ? "/S" : "", req, req->req.actual, req->req.length); ++ ++ while (likely(count-- != 0)) { ++ uint8_t byte = (uint8_t)usb_readl(dev, ep->fifo); ++ ++ if (unlikely(bufferspace == 0)) { ++ /* this happens when the driver's buffer ++ * is smaller than what the host sent. ++ * discard the extra data. ++ */ ++ if (req->req.status != -EOVERFLOW) ++ DEBUG_EP0("%s overflow %d\n", ep->ep.name, ++ count); ++ req->req.status = -EOVERFLOW; ++ } else { ++ *buf++ = byte; ++ bufferspace--; ++ } ++ } ++ ++ /* completion */ ++ if (is_short || req->req.actual == req->req.length) { ++ done(ep, req, 0); ++ return 1; ++ } ++ ++ /* finished that packet. the next one may be waiting... */ ++ return 0; ++} ++ ++/** ++ * udc_set_address - set the USB address for this device ++ * @address: ++ * ++ * Called from control endpoint function after it decodes a set address setup packet. ++ */ ++static void udc_set_address(struct jz4740_udc *dev, unsigned char address) ++{ ++ DEBUG_EP0("%s: %d\n", __FUNCTION__, address); ++ ++ usb_writeb(dev, JZ_REG_UDC_FADDR, address); ++} ++ ++/* ++ * DATA_STATE_RECV (USB_CSR0_OUTPKTRDY) ++ * - if error ++ * set USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND | USB_CSR0_SENDSTALL bits ++ * - else ++ * set USB_CSR0_SVDOUTPKTRDY bit ++ if last set USB_CSR0_DATAEND bit ++ */ ++static void jz4740_ep0_out(struct jz4740_udc *dev, uint32_t csr, int kickstart) ++{ ++ struct jz4740_request *req; ++ struct jz4740_ep *ep = &dev->ep[0]; ++ int ret; ++ ++ DEBUG_EP0("%s: %x\n", __FUNCTION__, csr); ++ ++ if (list_empty(&ep->queue)) ++ req = 0; ++ else ++ req = list_entry(ep->queue.next, struct jz4740_request, queue); ++ ++ if (req) { ++ if (req->req.length == 0) { ++ DEBUG_EP0("ZERO LENGTH OUT!\n"); ++ usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND)); ++ dev->ep0state = WAIT_FOR_SETUP; ++ return; ++ } else if (kickstart) { ++ usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY)); ++ return; ++ } ++ ret = read_fifo_ep0(ep, req); ++ if (ret) { ++ /* Done! */ ++ DEBUG_EP0("%s: finished, waiting for status\n", ++ __FUNCTION__); ++ usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_SVDOUTPKTRDY | USB_CSR0_DATAEND)); ++ dev->ep0state = WAIT_FOR_SETUP; ++ } else { ++ /* Not done yet.. */ ++ DEBUG_EP0("%s: not finished\n", __FUNCTION__); ++ usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_SVDOUTPKTRDY); ++ } ++ } else { ++ DEBUG_EP0("NO REQ??!\n"); ++ } ++} ++ ++/* ++ * DATA_STATE_XMIT ++ */ ++static int jz4740_ep0_in(struct jz4740_udc *dev, uint32_t csr) ++{ ++ struct jz4740_request *req; ++ struct jz4740_ep *ep = &dev->ep[0]; ++ int ret, need_zlp = 0; ++ ++ DEBUG_EP0("%s: %x\n", __FUNCTION__, csr); ++ ++ if (list_empty(&ep->queue)) ++ req = 0; ++ else ++ req = list_entry(ep->queue.next, struct jz4740_request, queue); ++ ++ if (!req) { ++ DEBUG_EP0("%s: NULL REQ\n", __FUNCTION__); ++ return 0; ++ } ++ ++ if (req->req.length == 0) { ++ usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_INPKTRDY | USB_CSR0_DATAEND)); ++ dev->ep0state = WAIT_FOR_SETUP; ++ return 1; ++ } ++ ++ if (req->req.length - req->req.actual == EP0_MAXPACKETSIZE) { ++ /* Next write will end with the packet size, */ ++ /* so we need zero-length-packet */ ++ need_zlp = 1; ++ } ++ ++ ret = write_fifo_ep0(ep, req); ++ ++ if (ret == 1 && !need_zlp) { ++ /* Last packet */ ++ DEBUG_EP0("%s: finished, waiting for status\n", __FUNCTION__); ++ ++ usb_setb(dev, JZ_REG_UDC_CSR0, (USB_CSR0_INPKTRDY | USB_CSR0_DATAEND)); ++ dev->ep0state = WAIT_FOR_SETUP; ++ } else { ++ DEBUG_EP0("%s: not finished\n", __FUNCTION__); ++ usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_INPKTRDY); ++ } ++ ++ if (need_zlp) { ++ DEBUG_EP0("%s: Need ZLP!\n", __FUNCTION__); ++ usb_setb(dev, JZ_REG_UDC_CSR0, USB_CSR0_INPKTRDY); ++ dev->ep0state = DATA_STATE_NEED_ZLP; ++ } ++ ++ return 1; ++} ++ ++static int jz4740_handle_get_status(struct jz4740_udc *dev, ++ struct usb_ctrlrequest *ctrl) ++{ ++ struct jz4740_ep *ep0 = &dev->ep[0]; ++ struct jz4740_ep *qep; ++ int reqtype = (ctrl->bRequestType & USB_RECIP_MASK); ++ uint16_t val = 0; ++ ++ DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__); ++ ++ if (reqtype == USB_RECIP_INTERFACE) { ++ /* This is not supported. ++ * And according to the USB spec, this one does nothing.. ++ * Just return 0 ++ */ ++ DEBUG_SETUP("GET_STATUS: USB_RECIP_INTERFACE\n"); ++ } else if (reqtype == USB_RECIP_DEVICE) { ++ DEBUG_SETUP("GET_STATUS: USB_RECIP_DEVICE\n"); ++ val |= (1 << 0); /* Self powered */ ++ /*val |= (1<<1); *//* Remote wakeup */ ++ } else if (reqtype == USB_RECIP_ENDPOINT) { ++ int ep_num = (ctrl->wIndex & ~USB_DIR_IN); ++ ++ DEBUG_SETUP ++ ("GET_STATUS: USB_RECIP_ENDPOINT (%d), ctrl->wLength = %d\n", ++ ep_num, ctrl->wLength); ++ ++ if (ctrl->wLength > 2 || ep_num > 3) ++ return -EOPNOTSUPP; ++ ++ qep = &dev->ep[ep_num]; ++ if (ep_is_in(qep) != ((ctrl->wIndex & USB_DIR_IN) ? 1 : 0) ++ && ep_index(qep) != 0) { ++ return -EOPNOTSUPP; ++ } ++ ++ jz_udc_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__, 0, ++ (dev->gadget.speed == USB_SPEED_HIGH) ? "HIGH":"FULL" ); ++} ++ ++/* ++ * jz4740 usb device interrupt handler. ++ */ ++static irqreturn_t jz4740_udc_irq(int irq, void *devid) ++{ ++ struct jz4740_udc *jz4740_udc = devid; ++ uint8_t index; ++ ++ uint32_t intr_usb = usb_readb(jz4740_udc, JZ_REG_UDC_INTRUSB) & 0x7; /* mask SOF */ ++ uint32_t intr_in = usb_readw(jz4740_udc, JZ_REG_UDC_INTRIN); ++ uint32_t intr_out = usb_readw(jz4740_udc, JZ_REG_UDC_INTROUT); ++ uint32_t intr_dma = usb_readb(jz4740_udc, JZ_REG_UDC_INTR); ++ ++ if (!intr_usb && !intr_in && !intr_out && !intr_dma) ++ return IRQ_HANDLED; ++ ++ ++ DEBUG("intr_out=%x intr_in=%x intr_usb=%x\n", ++ intr_out, intr_in, intr_usb); ++ ++ spin_lock(&jz4740_udc->lock); ++ index = usb_readb(jz4740_udc, JZ_REG_UDC_INDEX); ++ ++ /* Check for resume from suspend mode */ ++ if ((intr_usb & USB_INTR_RESUME) && ++ (usb_readb(jz4740_udc, JZ_REG_UDC_INTRUSBE) & USB_INTR_RESUME)) { ++ DEBUG("USB resume\n"); ++ jz4740_udc->driver->resume(&jz4740_udc->gadget); /* We have suspend(), so we must have resume() too. */ ++ } ++ ++ /* Check for system interrupts */ ++ if (intr_usb & USB_INTR_RESET) { ++ DEBUG("USB reset\n"); ++ jz4740_reset_irq(jz4740_udc); ++ } ++ ++ /* Check for endpoint 0 interrupt */ ++ if (intr_in & USB_INTR_EP0) { ++ DEBUG("USB_INTR_EP0 (control)\n"); ++ jz4740_handle_ep0(jz4740_udc, intr_in); ++ } ++ ++ /* Check for Bulk-IN DMA interrupt */ ++ if (intr_dma & 0x1) { ++ int ep_num; ++ struct jz4740_ep *ep; ++ ep_num = (usb_readl(jz4740_udc, JZ_REG_UDC_CNTL1) >> 4) & 0xf; ++ ep = &jz4740_udc->ep[ep_num + 1]; ++ jz_udc_set_index(jz4740_udc, ep_num); ++ usb_setb(jz4740_udc, ep->csr, USB_INCSR_INPKTRDY); ++/* jz4740_in_epn(jz4740_udc, ep_num, intr_in);*/ ++ } ++ ++ /* Check for Bulk-OUT DMA interrupt */ ++ if (intr_dma & 0x2) { ++ int ep_num; ++ ep_num = (usb_readl(jz4740_udc, JZ_REG_UDC_CNTL2) >> 4) & 0xf; ++ jz4740_out_epn(jz4740_udc, ep_num, intr_out); ++ } ++ ++ /* Check for each configured endpoint interrupt */ ++ if (intr_in & USB_INTR_INEP1) { ++ DEBUG("USB_INTR_INEP1\n"); ++ jz4740_in_epn(jz4740_udc, 1, intr_in); ++ } ++ ++ if (intr_in & USB_INTR_INEP2) { ++ DEBUG("USB_INTR_INEP2\n"); ++ jz4740_in_epn(jz4740_udc, 2, intr_in); ++ } ++ ++ if (intr_out & USB_INTR_OUTEP1) { ++ DEBUG("USB_INTR_OUTEP1\n"); ++ jz4740_out_epn(jz4740_udc, 1, intr_out); ++ } ++ ++ /* Check for suspend mode */ ++ if ((intr_usb & USB_INTR_SUSPEND) && ++ (usb_readb(jz4740_udc, JZ_REG_UDC_INTRUSBE) & USB_INTR_SUSPEND)) { ++ DEBUG("USB suspend\n"); ++ jz4740_udc->driver->suspend(&jz4740_udc->gadget); ++ /* Host unloaded from us, can do something, such as flushing ++ the NAND block cache etc. */ ++ } ++ ++ jz_udc_set_index(jz4740_udc, index); ++ ++ spin_unlock(&jz4740_udc->lock); ++ ++ return IRQ_HANDLED; ++} ++ ++ ++ ++/*-------------------------------------------------------------------------*/ ++ ++ ++static inline struct jz4740_udc *gadget_to_udc(struct usb_gadget *gadget) ++{ ++ return container_of(gadget, struct jz4740_udc, gadget); ++} ++ ++static int jz4740_udc_get_frame(struct usb_gadget *_gadget) ++{ ++ DEBUG("%s, %p\n", __FUNCTION__, _gadget); ++ return usb_readw(gadget_to_udc(_gadget), JZ_REG_UDC_FRAME); ++} ++ ++static int jz4740_udc_wakeup(struct usb_gadget *_gadget) ++{ ++ /* host may not have enabled remote wakeup */ ++ /*if ((UDCCS0 & UDCCS0_DRWF) == 0) ++ return -EHOSTUNREACH; ++ udc_set_mask_UDCCR(UDCCR_RSM); */ ++ return -ENOTSUPP; ++} ++ ++static int jz4740_udc_pullup(struct usb_gadget *_gadget, int on) ++{ ++ struct jz4740_udc *udc = gadget_to_udc(_gadget); ++ unsigned long flags; ++ ++ local_irq_save(flags); ++ ++ if (on) { ++ udc->state = UDC_STATE_ENABLE; ++ udc_enable(udc); ++ } else { ++ udc->state = UDC_STATE_DISABLE; ++ udc_disable(udc); ++ } ++ ++ local_irq_restore(flags); ++ ++ return 0; ++} ++ ++ ++static const struct usb_gadget_ops jz4740_udc_ops = { ++ .get_frame = jz4740_udc_get_frame, ++ .wakeup = jz4740_udc_wakeup, ++ .pullup = jz4740_udc_pullup, ++}; ++ ++static struct usb_ep_ops jz4740_ep_ops = { ++ .enable = jz4740_ep_enable, ++ .disable = jz4740_ep_disable, ++ ++ .alloc_request = jz4740_alloc_request, ++ .free_request = jz4740_free_request, ++ ++ .queue = jz4740_queue, ++ .dequeue = jz4740_dequeue, ++ ++ .set_halt = jz4740_set_halt, ++ .fifo_status = jz4740_fifo_status, ++ .fifo_flush = jz4740_fifo_flush, ++}; ++ ++ ++/*-------------------------------------------------------------------------*/ ++ ++static struct jz4740_udc jz4740_udc_controller = { ++ .gadget = { ++ .ops = &jz4740_udc_ops, ++ .ep0 = &jz4740_udc_controller.ep[0].ep, ++ .name = "jz4740-udc", ++ .dev = { ++ .init_name = "gadget", ++ }, ++ }, ++ ++ /* control endpoint */ ++ .ep[0] = { ++ .ep = { ++ .name = "ep0", ++ .ops = &jz4740_ep_ops, ++ .maxpacket = EP0_MAXPACKETSIZE, ++ }, ++ .dev = &jz4740_udc_controller, ++ ++ .bEndpointAddress = 0, ++ .bmAttributes = 0, ++ ++ .type = ep_control, ++ .fifo = JZ_REG_UDC_EP_FIFO(0), ++ .csr = JZ_REG_UDC_CSR0, ++ }, ++ ++ /* bulk out endpoint */ ++ .ep[1] = { ++ .ep = { ++ .name = "ep1out-bulk", ++ .ops = &jz4740_ep_ops, ++ .maxpacket = EPBULK_MAXPACKETSIZE, ++ }, ++ .dev = &jz4740_udc_controller, ++ ++ .bEndpointAddress = 1, ++ .bmAttributes = USB_ENDPOINT_XFER_BULK, ++ ++ .type = ep_bulk_out, ++ .fifo = JZ_REG_UDC_EP_FIFO(1), ++ .csr = JZ_REG_UDC_OUTCSR, ++ }, ++ ++ /* bulk in endpoint */ ++ .ep[2] = { ++ .ep = { ++ .name = "ep1in-bulk", ++ .ops = &jz4740_ep_ops, ++ .maxpacket = EPBULK_MAXPACKETSIZE, ++ }, ++ .dev = &jz4740_udc_controller, ++ ++ .bEndpointAddress = 1 | USB_DIR_IN, ++ .bmAttributes = USB_ENDPOINT_XFER_BULK, ++ ++ .type = ep_bulk_in, ++ .fifo = JZ_REG_UDC_EP_FIFO(1), ++ .csr = JZ_REG_UDC_INCSR, ++ }, ++ ++ /* interrupt in endpoint */ ++ .ep[3] = { ++ .ep = { ++ .name = "ep2in-int", ++ .ops = &jz4740_ep_ops, ++ .maxpacket = EPINTR_MAXPACKETSIZE, ++ }, ++ .dev = &jz4740_udc_controller, ++ ++ .bEndpointAddress = 2 | USB_DIR_IN, ++ .bmAttributes = USB_ENDPOINT_XFER_INT, ++ ++ .type = ep_interrupt, ++ .fifo = JZ_REG_UDC_EP_FIFO(2), ++ .csr = JZ_REG_UDC_INCSR, ++ }, ++}; ++ ++static int __devinit jz4740_udc_probe(struct platform_device *pdev) ++{ ++ struct jz4740_udc *jz4740_udc = &jz4740_udc_controller; ++ int ret; ++ ++ spin_lock_init(&jz4740_udc->lock); ++ ++ jz4740_udc->dev = &pdev->dev; ++ jz4740_udc->gadget.dev.parent = &pdev->dev; ++ jz4740_udc->gadget.dev.dma_mask = pdev->dev.dma_mask; ++ ++ ret = device_register(&jz4740_udc->gadget.dev); ++ if (ret) ++ return ret; ++ ++ jz4740_udc->clk = clk_get(&pdev->dev, "udc"); ++ if (IS_ERR(jz4740_udc->clk)) { ++ ret = PTR_ERR(jz4740_udc->clk); ++ dev_err(&pdev->dev, "Failed to get udc clock: %d\n", ret); ++ goto err_device_unregister; ++ } ++ ++ platform_set_drvdata(pdev, jz4740_udc); ++ ++ jz4740_udc->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ ++ if (!jz4740_udc->mem) { ++ ret = -ENOENT; ++ dev_err(&pdev->dev, "Failed to get mmio memory resource\n"); ++ goto err_clk_put; ++ } ++ ++ jz4740_udc->mem = request_mem_region(jz4740_udc->mem->start, ++ resource_size(jz4740_udc->mem), pdev->name); ++ ++ if (!jz4740_udc->mem) { ++ ret = -EBUSY; ++ dev_err(&pdev->dev, "Failed to request mmio memory region\n"); ++ goto err_device_unregister; ++ } ++ ++ jz4740_udc->base = ioremap(jz4740_udc->mem->start, resource_size(jz4740_udc->mem)); ++ ++ if (!jz4740_udc->base) { ++ ret = -EBUSY; ++ dev_err(&pdev->dev, "Failed to ioremap mmio memory\n"); ++ goto err_release_mem_region; ++ } ++ ++ jz4740_udc->irq = platform_get_irq(pdev, 0); ++ ret = request_irq(jz4740_udc->irq, jz4740_udc_irq, 0, pdev->name, ++ jz4740_udc); ++ if (ret) { ++ dev_err(&pdev->dev, "Failed to request irq: %d\n", ret); ++ goto err_iounmap; ++ } ++ ++ udc_disable(jz4740_udc); ++ udc_reinit(jz4740_udc); ++ ++ return 0; ++ ++err_iounmap: ++ iounmap(jz4740_udc->base); ++err_release_mem_region: ++ release_mem_region(jz4740_udc->mem->start, resource_size(jz4740_udc->mem)); ++err_clk_put: ++ clk_put(jz4740_udc->clk); ++err_device_unregister: ++ device_unregister(&jz4740_udc->gadget.dev); ++ platform_set_drvdata(pdev, NULL); ++ ++ return ret; ++} ++ ++static int __devexit 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); ++ ++ return 0; ++} ++ ++#ifdef CONFIG_PM ++ ++static int jz4740_udc_suspend(struct device *dev) ++{ ++ struct jz4740_udc *jz4740_udc = dev_get_drvdata(dev); ++ ++ if (jz4740_udc->state == UDC_STATE_ENABLE) ++ udc_disable(jz4740_udc); ++ ++ return 0; ++} ++ ++static int jz4740_udc_resume(struct device *dev) ++{ ++ struct jz4740_udc *jz4740_udc = dev_get_drvdata(dev); ++ ++ if (jz4740_udc->state == UDC_STATE_ENABLE) ++ udc_enable(jz4740_udc); ++ ++ return 0; ++} ++ ++static const 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 = __devexit_p(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"); +--- /dev/null ++++ b/drivers/usb/gadget/jz4740_udc.h +@@ -0,0 +1,101 @@ ++/* ++ * linux/drivers/usb/gadget/jz4740_udc.h ++ * ++ * Ingenic JZ4740 on-chip high speed USB device controller ++ * ++ * Copyright (C) 2006 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. ++ */ ++ ++#ifndef __USB_GADGET_JZ4740_H__ ++#define __USB_GADGET_JZ4740_H__ ++ ++/*-------------------------------------------------------------------------*/ ++ ++// Max packet size ++#define EP0_MAXPACKETSIZE 64 ++#define EPBULK_MAXPACKETSIZE 512 ++#define EPINTR_MAXPACKETSIZE 64 ++ ++#define UDC_MAX_ENDPOINTS 4 ++ ++/*-------------------------------------------------------------------------*/ ++ ++enum ep_type { ++ ep_control, ep_bulk_in, ep_bulk_out, ep_interrupt ++}; ++ ++struct jz4740_ep { ++ struct usb_ep ep; ++ struct jz4740_udc *dev; ++ ++ const struct usb_endpoint_descriptor *desc; ++ ++ uint8_t stopped; ++ uint8_t bEndpointAddress; ++ uint8_t bmAttributes; ++ ++ enum ep_type type; ++ size_t fifo; ++ uint32_t csr; ++ ++ uint32_t reg_addr; ++ struct list_head queue; ++}; ++ ++struct jz4740_request { ++ struct usb_request req; ++ struct list_head queue; ++}; ++ ++enum ep0state { ++ WAIT_FOR_SETUP, /* between STATUS ack and SETUP report */ ++ DATA_STATE_XMIT, /* data tx stage */ ++ DATA_STATE_NEED_ZLP, /* data tx zlp stage */ ++ WAIT_FOR_OUT_STATUS, /* status stages */ ++ DATA_STATE_RECV, /* data rx stage */ ++}; ++ ++/* For function binding with UDC Disable - Added by River */ ++typedef enum { ++ UDC_STATE_ENABLE = 0, ++ UDC_STATE_DISABLE, ++}udc_state_t; ++ ++struct jz4740_udc { ++ struct usb_gadget gadget; ++ struct usb_gadget_driver *driver; ++ struct device *dev; ++ spinlock_t lock; ++ unsigned long lock_flags; ++ ++ enum ep0state ep0state; ++ struct jz4740_ep ep[UDC_MAX_ENDPOINTS]; ++ ++ udc_state_t state; ++ ++ struct resource *mem; ++ void __iomem *base; ++ int irq; ++ ++ struct clk *clk; ++}; ++ ++#define ep_maxpacket(EP) ((EP)->ep.maxpacket) ++ ++static inline bool ep_is_in(const struct jz4740_ep *ep) ++{ ++ return (ep->bEndpointAddress & USB_DIR_IN) == USB_DIR_IN; ++} ++ ++static inline uint8_t ep_index(const struct jz4740_ep *ep) ++{ ++ return ep->bEndpointAddress & 0xf; ++} ++ ++#endif /* __USB_GADGET_JZ4740_H__ */ |