2411 lines
58 KiB
C
2411 lines
58 KiB
C
/*
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* linux/drivers/usb/gadget/jz4740_udc.c
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*
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* Ingenic JZ4740 on-chip high speed USB device controller
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*
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* Copyright (C) 2006 - 2008 Ingenic Semiconductor Inc.
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* Author: <jlwei@ingenic.cn>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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/*
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* This device has ep0, two bulk-in/interrupt-in endpoints, and one bulk-out endpoint.
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*
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* - Endpoint numbering is fixed: ep0, ep1in-int, ep2in-bulk, ep1out-bulk.
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* - DMA works with bulk-in (channel 1) and bulk-out (channel 2) endpoints.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/proc_fs.h>
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#include <linux/usb.h>
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#include <linux/usb/gadget.h>
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#include <linux/clk.h>
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#include <asm/byteorder.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#include <asm/mach-jz4740/jz4740.h>
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#include <asm/mach-jz4740/clock.h>
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#include "jz4740_udc.h"
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#define JZ_REG_UDC_FADDR 0x00 /* Function Address 8-bit */
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#define JZ_REG_UDC_POWER 0x01 /* Power Managemetn 8-bit */
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#define JZ_REG_UDC_INTRIN 0x02 /* Interrupt IN 16-bit */
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#define JZ_REG_UDC_INTROUT 0x04 /* Interrupt OUT 16-bit */
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#define JZ_REG_UDC_INTRINE 0x06 /* Intr IN enable 16-bit */
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#define JZ_REG_UDC_INTROUTE 0x08 /* Intr OUT enable 16-bit */
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#define JZ_REG_UDC_INTRUSB 0x0a /* Interrupt USB 8-bit */
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#define JZ_REG_UDC_INTRUSBE 0x0b /* Interrupt USB Enable 8-bit */
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#define JZ_REG_UDC_FRAME 0x0c /* Frame number 16-bit */
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#define JZ_REG_UDC_INDEX 0x0e /* Index register 8-bit */
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#define JZ_REG_UDC_TESTMODE 0x0f /* USB test mode 8-bit */
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#define JZ_REG_UDC_CSR0 0x12 /* EP0 CSR 8-bit */
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#define JZ_REG_UDC_INMAXP 0x10 /* EP1-2 IN Max Pkt Size 16-bit */
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#define JZ_REG_UDC_INCSR 0x12 /* EP1-2 IN CSR LSB 8/16bit */
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#define JZ_REG_UDC_INCSRH 0x13 /* EP1-2 IN CSR MSB 8-bit */
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#define JZ_REG_UDC_OUTMAXP 0x14 /* EP1 OUT Max Pkt Size 16-bit */
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#define JZ_REG_UDC_OUTCSR 0x16 /* EP1 OUT CSR LSB 8/16bit */
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#define JZ_REG_UDC_OUTCSRH 0x17 /* EP1 OUT CSR MSB 8-bit */
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#define JZ_REG_UDC_OUTCOUNT 0x18 /* bytes in EP0/1 OUT FIFO 16-bit */
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#define JZ_REG_UDC_EP_FIFO(x) (4 * (x) + 0x20)
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#define JZ_REG_UDC_EPINFO 0x78 /* Endpoint information */
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#define JZ_REG_UDC_RAMINFO 0x79 /* RAM information */
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#define JZ_REG_UDC_INTR 0x200 /* DMA pending interrupts */
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#define JZ_REG_UDC_CNTL1 0x204 /* DMA channel 1 control */
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#define JZ_REG_UDC_ADDR1 0x208 /* DMA channel 1 AHB memory addr */
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#define JZ_REG_UDC_COUNT1 0x20c /* DMA channel 1 byte count */
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#define JZ_REG_UDC_CNTL2 0x214 /* DMA channel 2 control */
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#define JZ_REG_UDC_ADDR2 0x218 /* DMA channel 2 AHB memory addr */
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#define JZ_REG_UDC_COUNT2 0x21c /* DMA channel 2 byte count */
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/* Power register bit masks */
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#define USB_POWER_SUSPENDM 0x01
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#define USB_POWER_RESUME 0x04
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#define USB_POWER_HSMODE 0x10
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#define USB_POWER_HSENAB 0x20
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#define USB_POWER_SOFTCONN 0x40
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/* Interrupt register bit masks */
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#define USB_INTR_SUSPEND 0x01
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#define USB_INTR_RESUME 0x02
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#define USB_INTR_RESET 0x04
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#define USB_INTR_EP0 0x0001
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#define USB_INTR_INEP1 0x0002
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#define USB_INTR_INEP2 0x0004
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#define USB_INTR_OUTEP1 0x0002
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/* CSR0 bit masks */
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#define USB_CSR0_OUTPKTRDY 0x01
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#define USB_CSR0_INPKTRDY 0x02
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#define USB_CSR0_SENTSTALL 0x04
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#define USB_CSR0_DATAEND 0x08
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#define USB_CSR0_SETUPEND 0x10
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#define USB_CSR0_SENDSTALL 0x20
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#define USB_CSR0_SVDOUTPKTRDY 0x40
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#define USB_CSR0_SVDSETUPEND 0x80
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/* Endpoint CSR register bits */
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#define USB_INCSRH_AUTOSET 0x80
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#define USB_INCSRH_ISO 0x40
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#define USB_INCSRH_MODE 0x20
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#define USB_INCSRH_DMAREQENAB 0x10
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#define USB_INCSRH_DMAREQMODE 0x04
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#define USB_INCSR_CDT 0x40
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#define USB_INCSR_SENTSTALL 0x20
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#define USB_INCSR_SENDSTALL 0x10
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#define USB_INCSR_FF 0x08
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#define USB_INCSR_UNDERRUN 0x04
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#define USB_INCSR_FFNOTEMPT 0x02
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#define USB_INCSR_INPKTRDY 0x01
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#define USB_OUTCSRH_AUTOCLR 0x80
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#define USB_OUTCSRH_ISO 0x40
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#define USB_OUTCSRH_DMAREQENAB 0x20
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#define USB_OUTCSRH_DNYT 0x10
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#define USB_OUTCSRH_DMAREQMODE 0x08
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#define USB_OUTCSR_CDT 0x80
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#define USB_OUTCSR_SENTSTALL 0x40
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#define USB_OUTCSR_SENDSTALL 0x20
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#define USB_OUTCSR_FF 0x10
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#define USB_OUTCSR_DATAERR 0x08
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#define USB_OUTCSR_OVERRUN 0x04
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#define USB_OUTCSR_FFFULL 0x02
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#define USB_OUTCSR_OUTPKTRDY 0x01
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/* Testmode register bits */
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#define USB_TEST_SE0NAK 0x01
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#define USB_TEST_J 0x02
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#define USB_TEST_K 0x04
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#define USB_TEST_PACKET 0x08
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/* DMA control bits */
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#define USB_CNTL_ENA 0x01
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#define USB_CNTL_DIR_IN 0x02
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#define USB_CNTL_MODE_1 0x04
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#define USB_CNTL_INTR_EN 0x08
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#define USB_CNTL_EP(n) ((n) << 4)
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#define USB_CNTL_BURST_0 (0 << 9)
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#define USB_CNTL_BURST_4 (1 << 9)
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#define USB_CNTL_BURST_8 (2 << 9)
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#define USB_CNTL_BURST_16 (3 << 9)
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#ifndef DEBUG
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# define DEBUG(fmt,args...) do {} while(0)
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#endif
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#ifndef DEBUG_EP0
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# define NO_STATES
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# define DEBUG_EP0(fmt,args...) do {} while(0)
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#endif
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#ifndef DEBUG_SETUP
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# define DEBUG_SETUP(fmt,args...) do {} while(0)
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#endif
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static unsigned int udc_debug = 0; /* 0: normal mode, 1: test udc cable type mode */
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module_param(udc_debug, int, 0);
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MODULE_PARM_DESC(udc_debug, "test udc cable or power type");
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static unsigned int use_dma = 0; /* 1: use DMA, 0: use PIO */
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module_param(use_dma, int, 0);
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MODULE_PARM_DESC(use_dma, "DMA mode enable flag");
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struct jz4740_udc *the_controller;
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/*
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* Local declarations.
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*/
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static void jz4740_ep0_kick(struct jz4740_udc *dev, struct jz4740_ep *ep);
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static void jz4740_handle_ep0(struct jz4740_udc *dev, uint32_t intr);
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static void done(struct jz4740_ep *ep, struct jz4740_request *req,
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int status);
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static void pio_irq_enable(struct jz4740_ep *ep);
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static void pio_irq_disable(struct jz4740_ep *ep);
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static void stop_activity(struct jz4740_udc *dev,
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struct usb_gadget_driver *driver);
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static void nuke(struct jz4740_ep *ep, int status);
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static void flush(struct jz4740_ep *ep);
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static void udc_set_address(struct jz4740_udc *dev, unsigned char address);
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/*-------------------------------------------------------------------------*/
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/* inline functions of register read/write/set/clear */
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static inline uint8_t usb_readb(struct jz4740_udc *udc, size_t reg)
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{
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return readb(udc->base + reg);
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}
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static inline uint16_t usb_readw(struct jz4740_udc *udc, size_t reg)
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{
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return readw(udc->base + reg);
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}
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static inline uint32_t usb_readl(struct jz4740_udc *udc, size_t reg)
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{
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return readl(udc->base + reg);
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}
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static inline void usb_writeb(struct jz4740_udc *udc, size_t reg, uint8_t val)
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{
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writeb(val, udc->base + reg);
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}
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static inline void usb_writew(struct jz4740_udc *udc, size_t reg, uint16_t val)
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{
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writew(val, udc->base + reg);
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}
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static inline void usb_writel(struct jz4740_udc *udc, size_t reg, uint32_t val)
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{
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writel(val, udc->base + reg);
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}
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static inline void usb_setb(struct jz4740_udc *udc, size_t reg, uint8_t mask)
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{
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usb_writeb(udc, reg, usb_readb(udc, reg) | mask);
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}
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static inline void usb_setw(struct jz4740_udc *udc, size_t reg, uint8_t mask)
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{
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usb_writew(udc, reg, usb_readw(udc, reg) | mask);
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}
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static inline void usb_setl(struct jz4740_udc *udc, size_t reg, uint32_t mask)
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{
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usb_writel(udc, reg, usb_readl(udc, reg) | mask);
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}
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static inline void usb_clearb(struct jz4740_udc *udc, size_t reg, uint8_t mask)
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{
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usb_writeb(udc, reg, usb_readb(udc, reg) & ~mask);
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}
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static inline void usb_clearw(struct jz4740_udc *udc, size_t reg, uint16_t mask)
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{
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usb_writew(udc, reg, usb_readw(udc, reg) & ~mask);
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}
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static inline void usb_clearl(struct jz4740_udc *udc, size_t reg, uint32_t mask)
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{
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usb_writel(udc, reg, usb_readl(udc, reg) & ~mask);
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}
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/*-------------------------------------------------------------------------*/
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static inline void jz_udc_set_index(struct jz4740_udc *udc, uint8_t index)
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{
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usb_writeb(udc, JZ_REG_UDC_INDEX, index);
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}
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static inline void jz_udc_select_ep(struct jz4740_ep *ep)
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{
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jz_udc_set_index(ep->dev, ep_index(ep));
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}
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static inline int write_packet(struct jz4740_ep *ep,
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struct jz4740_request *req, int max)
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{
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uint8_t *buf;
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int length, nlong, nbyte;
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DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
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buf = req->req.buf + req->req.actual;
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prefetch(buf);
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length = req->req.length - req->req.actual;
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length = min(length, max);
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req->req.actual += length;
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DEBUG("Write %d (max %d), fifo %x\n", length, max, ep->fifo);
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nlong = length >> 2;
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nbyte = length & 0x3;
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while (nlong--) {
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usb_writel(ep->dev, ep->fifo, *((uint32_t *)buf));
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buf += 4;
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}
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while (nbyte--) {
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usb_writeb(ep->dev, ep->fifo, *buf++);
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}
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return length;
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}
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static inline int read_packet(struct jz4740_ep *ep,
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struct jz4740_request *req, int count)
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{
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uint8_t *buf;
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int length, nlong, nbyte;
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DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
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buf = req->req.buf + req->req.actual;
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prefetchw(buf);
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length = req->req.length - req->req.actual;
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length = min(length, count);
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req->req.actual += length;
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DEBUG("Read %d, fifo %x\n", length, ep->fifo);
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nlong = length >> 2;
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nbyte = length & 0x3;
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while (nlong--) {
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*((uint32_t *)buf) = usb_readl(ep->dev, ep->fifo);
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buf += 4;
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}
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while (nbyte--) {
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*buf++ = usb_readb(ep->dev, ep->fifo);
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}
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return length;
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}
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/*-------------------------------------------------------------------------*/
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/*
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* udc_disable - disable USB device controller
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*/
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static void udc_disable(struct jz4740_udc *dev)
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{
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DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
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udc_set_address(dev, 0);
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/* Disable interrupts */
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usb_writew(dev, JZ_REG_UDC_INTRINE, 0);
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usb_writew(dev, JZ_REG_UDC_INTROUTE, 0);
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usb_writeb(dev, JZ_REG_UDC_INTRUSBE, 0);
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/* Disable DMA */
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usb_writel(dev, JZ_REG_UDC_CNTL1, 0);
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usb_writel(dev, JZ_REG_UDC_CNTL2, 0);
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/* Disconnect from usb */
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usb_clearb(dev, JZ_REG_UDC_POWER, USB_POWER_SOFTCONN);
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/* Disable the USB PHY */
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clk_disable(dev->clk);
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dev->ep0state = WAIT_FOR_SETUP;
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dev->gadget.speed = USB_SPEED_UNKNOWN;
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return;
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}
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/*
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* udc_reinit - initialize software state
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*/
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static void udc_reinit(struct jz4740_udc *dev)
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{
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int i;
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DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
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/* device/ep0 records init */
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INIT_LIST_HEAD(&dev->gadget.ep_list);
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INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
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dev->ep0state = WAIT_FOR_SETUP;
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for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
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struct jz4740_ep *ep = &dev->ep[i];
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if (i != 0)
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list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
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INIT_LIST_HEAD(&ep->queue);
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ep->desc = 0;
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ep->stopped = 0;
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ep->pio_irqs = 0;
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}
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}
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|
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/* until it's enabled, this UDC should be completely invisible
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* to any USB host.
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*/
|
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static void udc_enable(struct jz4740_udc *dev)
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{
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int i;
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DEBUG("%s:%s[%d]\n", __FILE__, __func__, __LINE__);
|
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|
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/* UDC state is incorrect - Added by River */
|
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if (dev->state != UDC_STATE_ENABLE) {
|
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return;
|
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}
|
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|
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dev->gadget.speed = USB_SPEED_UNKNOWN;
|
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|
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/* Flush FIFO for each */
|
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for (i = 0; i < UDC_MAX_ENDPOINTS; i++) {
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struct jz4740_ep *ep = &dev->ep[i];
|
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|
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jz_udc_set_index(dev, ep_index(ep));
|
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flush(ep);
|
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}
|
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|
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/* Set this bit to allow the UDC entering low-power mode when
|
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* there are no actions on the USB bus.
|
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* UDC still works during this bit was set.
|
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*/
|
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jz4740_clock_udc_enable_auto_suspend();
|
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|
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/* Enable the USB PHY */
|
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clk_enable(dev->clk);
|
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|
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/* Disable interrupts */
|
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/* usb_writew(dev, JZ_REG_UDC_INTRINE, 0);
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usb_writew(dev, JZ_REG_UDC_INTROUTE, 0);
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usb_writeb(dev, JZ_REG_UDC_INTRUSBE, 0);*/
|
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|
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/* Enable interrupts */
|
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usb_setw(dev, JZ_REG_UDC_INTRINE, USB_INTR_EP0);
|
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usb_setb(dev, JZ_REG_UDC_INTRUSBE, USB_INTR_RESET);
|
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/* Don't enable rest of the interrupts */
|
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/* usb_setw(dev, JZ_REG_UDC_INTRINE, USB_INTR_INEP1 | USB_INTR_INEP2);
|
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usb_setw(dev, JZ_REG_UDC_INTROUTE, USB_INTR_OUTEP1); */
|
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|
||
/* Enable SUSPEND */
|
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/* usb_setb(dev, JZ_REG_UDC_POWER, USB_POWER_SUSPENDM); */
|
||
|
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/* 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 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);
|
||
}
|
||
}
|
||
|
||
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;
|
||
}
|
||
|
||
static struct platform_driver udc_driver = {
|
||
.probe = jz4740_udc_probe,
|
||
.remove = jz4740_udc_remove,
|
||
.driver = {
|
||
.name = "jz-udc",
|
||
.owner = THIS_MODULE,
|
||
},
|
||
};
|
||
|
||
/*-------------------------------------------------------------------------*/
|
||
|
||
static int __init udc_init (void)
|
||
{
|
||
return platform_driver_register(&udc_driver);
|
||
}
|
||
|
||
static void __exit udc_exit (void)
|
||
{
|
||
platform_driver_unregister(&udc_driver);
|
||
}
|
||
|
||
module_init(udc_init);
|
||
module_exit(udc_exit);
|
||
|
||
MODULE_DESCRIPTION("JZ4740 USB Device Controller");
|
||
MODULE_AUTHOR("Wei Jianli <jlwei@ingenic.cn>");
|
||
MODULE_LICENSE("GPL");
|