2013 lines
47 KiB
C
2013 lines
47 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* linux/drivers/usb/gadget/s3c2410_udc.c
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*
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* Samsung S3C24xx series on-chip full speed USB device controllers
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*
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* Copyright (C) 2004-2007 Herbert Pötzl - Arnaud Patard
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* Additional cleanups by Ben Dooks <ben-linux@fluff.org>
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*/
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#define pr_fmt(fmt) "s3c2410_udc: " fmt
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/ioport.h>
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#include <linux/sched.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/timer.h>
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#include <linux/list.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <linux/gpio.h>
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#include <linux/prefetch.h>
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#include <linux/io.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/usb.h>
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#include <linux/usb/gadget.h>
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#include <asm/byteorder.h>
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#include <asm/irq.h>
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#include <asm/unaligned.h>
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#include <mach/irqs.h>
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#include <mach/hardware.h>
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#include <plat/regs-udc.h>
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#include <linux/platform_data/usb-s3c2410_udc.h>
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#include "s3c2410_udc.h"
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#define DRIVER_DESC "S3C2410 USB Device Controller Gadget"
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#define DRIVER_AUTHOR "Herbert Pötzl <herbert@13thfloor.at>, " \
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"Arnaud Patard <arnaud.patard@rtp-net.org>"
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static const char gadget_name[] = "s3c2410_udc";
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static const char driver_desc[] = DRIVER_DESC;
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static struct s3c2410_udc *the_controller;
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static struct clk *udc_clock;
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static struct clk *usb_bus_clock;
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static void __iomem *base_addr;
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static u64 rsrc_start;
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static u64 rsrc_len;
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static struct dentry *s3c2410_udc_debugfs_root;
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static inline u32 udc_read(u32 reg)
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{
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return readb(base_addr + reg);
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}
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static inline void udc_write(u32 value, u32 reg)
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{
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writeb(value, base_addr + reg);
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}
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static inline void udc_writeb(void __iomem *base, u32 value, u32 reg)
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{
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writeb(value, base + reg);
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}
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static struct s3c2410_udc_mach_info *udc_info;
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/*************************** DEBUG FUNCTION ***************************/
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#define DEBUG_NORMAL 1
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#define DEBUG_VERBOSE 2
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#ifdef CONFIG_USB_S3C2410_DEBUG
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#define USB_S3C2410_DEBUG_LEVEL 0
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static uint32_t s3c2410_ticks = 0;
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__printf(2, 3)
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static void dprintk(int level, const char *fmt, ...)
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{
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static long prevticks;
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static int invocation;
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struct va_format vaf;
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va_list args;
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if (level > USB_S3C2410_DEBUG_LEVEL)
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return;
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va_start(args, fmt);
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vaf.fmt = fmt;
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vaf.va = &args;
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if (s3c2410_ticks != prevticks) {
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prevticks = s3c2410_ticks;
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invocation = 0;
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}
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pr_debug("%1lu.%02d USB: %pV", prevticks, invocation++, &vaf);
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va_end(args);
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}
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#else
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__printf(2, 3)
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static void dprintk(int level, const char *fmt, ...)
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{
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}
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#endif
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static int s3c2410_udc_debugfs_seq_show(struct seq_file *m, void *p)
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{
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u32 addr_reg, pwr_reg, ep_int_reg, usb_int_reg;
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u32 ep_int_en_reg, usb_int_en_reg, ep0_csr;
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u32 ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2;
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u32 ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2;
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addr_reg = udc_read(S3C2410_UDC_FUNC_ADDR_REG);
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pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
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ep_int_reg = udc_read(S3C2410_UDC_EP_INT_REG);
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usb_int_reg = udc_read(S3C2410_UDC_USB_INT_REG);
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ep_int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
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usb_int_en_reg = udc_read(S3C2410_UDC_USB_INT_EN_REG);
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udc_write(0, S3C2410_UDC_INDEX_REG);
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ep0_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
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udc_write(1, S3C2410_UDC_INDEX_REG);
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ep1_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
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ep1_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
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ep1_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
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ep1_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
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udc_write(2, S3C2410_UDC_INDEX_REG);
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ep2_i_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
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ep2_i_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
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ep2_o_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
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ep2_o_csr2 = udc_read(S3C2410_UDC_IN_CSR2_REG);
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seq_printf(m, "FUNC_ADDR_REG : 0x%04X\n"
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"PWR_REG : 0x%04X\n"
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"EP_INT_REG : 0x%04X\n"
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"USB_INT_REG : 0x%04X\n"
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"EP_INT_EN_REG : 0x%04X\n"
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"USB_INT_EN_REG : 0x%04X\n"
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"EP0_CSR : 0x%04X\n"
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"EP1_I_CSR1 : 0x%04X\n"
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"EP1_I_CSR2 : 0x%04X\n"
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"EP1_O_CSR1 : 0x%04X\n"
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"EP1_O_CSR2 : 0x%04X\n"
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"EP2_I_CSR1 : 0x%04X\n"
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"EP2_I_CSR2 : 0x%04X\n"
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"EP2_O_CSR1 : 0x%04X\n"
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"EP2_O_CSR2 : 0x%04X\n",
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addr_reg, pwr_reg, ep_int_reg, usb_int_reg,
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ep_int_en_reg, usb_int_en_reg, ep0_csr,
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ep1_i_csr1, ep1_i_csr2, ep1_o_csr1, ep1_o_csr2,
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ep2_i_csr1, ep2_i_csr2, ep2_o_csr1, ep2_o_csr2
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);
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return 0;
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}
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static int s3c2410_udc_debugfs_fops_open(struct inode *inode,
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struct file *file)
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{
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return single_open(file, s3c2410_udc_debugfs_seq_show, NULL);
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}
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static const struct file_operations s3c2410_udc_debugfs_fops = {
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.open = s3c2410_udc_debugfs_fops_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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.owner = THIS_MODULE,
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};
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/* io macros */
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static inline void s3c2410_udc_clear_ep0_opr(void __iomem *base)
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{
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udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
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udc_writeb(base, S3C2410_UDC_EP0_CSR_SOPKTRDY,
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S3C2410_UDC_EP0_CSR_REG);
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}
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static inline void s3c2410_udc_clear_ep0_sst(void __iomem *base)
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{
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udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
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writeb(0x00, base + S3C2410_UDC_EP0_CSR_REG);
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}
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static inline void s3c2410_udc_clear_ep0_se(void __iomem *base)
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{
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udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
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udc_writeb(base, S3C2410_UDC_EP0_CSR_SSE, S3C2410_UDC_EP0_CSR_REG);
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}
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static inline void s3c2410_udc_set_ep0_ipr(void __iomem *base)
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{
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udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
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udc_writeb(base, S3C2410_UDC_EP0_CSR_IPKRDY, S3C2410_UDC_EP0_CSR_REG);
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}
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static inline void s3c2410_udc_set_ep0_de(void __iomem *base)
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{
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udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
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udc_writeb(base, S3C2410_UDC_EP0_CSR_DE, S3C2410_UDC_EP0_CSR_REG);
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}
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inline void s3c2410_udc_set_ep0_ss(void __iomem *b)
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{
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udc_writeb(b, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
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udc_writeb(b, S3C2410_UDC_EP0_CSR_SENDSTL, S3C2410_UDC_EP0_CSR_REG);
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}
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static inline void s3c2410_udc_set_ep0_de_out(void __iomem *base)
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{
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udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
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udc_writeb(base, (S3C2410_UDC_EP0_CSR_SOPKTRDY
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| S3C2410_UDC_EP0_CSR_DE),
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S3C2410_UDC_EP0_CSR_REG);
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}
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static inline void s3c2410_udc_set_ep0_de_in(void __iomem *base)
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{
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udc_writeb(base, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
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udc_writeb(base, (S3C2410_UDC_EP0_CSR_IPKRDY
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| S3C2410_UDC_EP0_CSR_DE),
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S3C2410_UDC_EP0_CSR_REG);
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}
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/*------------------------- I/O ----------------------------------*/
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/*
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* s3c2410_udc_done
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*/
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static void s3c2410_udc_done(struct s3c2410_ep *ep,
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struct s3c2410_request *req, int status)
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{
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unsigned halted = ep->halted;
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list_del_init(&req->queue);
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if (likely(req->req.status == -EINPROGRESS))
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req->req.status = status;
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else
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status = req->req.status;
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ep->halted = 1;
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usb_gadget_giveback_request(&ep->ep, &req->req);
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ep->halted = halted;
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}
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static void s3c2410_udc_nuke(struct s3c2410_udc *udc,
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struct s3c2410_ep *ep, int status)
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{
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while (!list_empty(&ep->queue)) {
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struct s3c2410_request *req;
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req = list_entry(ep->queue.next, struct s3c2410_request,
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queue);
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s3c2410_udc_done(ep, req, status);
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}
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}
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static inline int s3c2410_udc_fifo_count_out(void)
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{
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int tmp;
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tmp = udc_read(S3C2410_UDC_OUT_FIFO_CNT2_REG) << 8;
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tmp |= udc_read(S3C2410_UDC_OUT_FIFO_CNT1_REG);
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return tmp;
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}
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/*
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* s3c2410_udc_write_packet
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*/
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static inline int s3c2410_udc_write_packet(int fifo,
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struct s3c2410_request *req,
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unsigned max)
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{
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unsigned len = min(req->req.length - req->req.actual, max);
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u8 *buf = req->req.buf + req->req.actual;
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prefetch(buf);
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dprintk(DEBUG_VERBOSE, "%s %d %d %d %d\n", __func__,
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req->req.actual, req->req.length, len, req->req.actual + len);
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req->req.actual += len;
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udelay(5);
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writesb(base_addr + fifo, buf, len);
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return len;
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}
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/*
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* s3c2410_udc_write_fifo
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*
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* return: 0 = still running, 1 = completed, negative = errno
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*/
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static int s3c2410_udc_write_fifo(struct s3c2410_ep *ep,
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struct s3c2410_request *req)
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{
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unsigned count;
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int is_last;
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u32 idx;
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int fifo_reg;
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u32 ep_csr;
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idx = ep->bEndpointAddress & 0x7F;
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switch (idx) {
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default:
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idx = 0;
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case 0:
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fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
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break;
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case 1:
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fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
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break;
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case 2:
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fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
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break;
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case 3:
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fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
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break;
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case 4:
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fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
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break;
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}
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count = s3c2410_udc_write_packet(fifo_reg, req, ep->ep.maxpacket);
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/* last packet is often short (sometimes a zlp) */
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if (count != ep->ep.maxpacket)
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is_last = 1;
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else if (req->req.length != req->req.actual || req->req.zero)
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is_last = 0;
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else
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is_last = 2;
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/* Only ep0 debug messages are interesting */
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if (idx == 0)
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dprintk(DEBUG_NORMAL,
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"Written ep%d %d.%d of %d b [last %d,z %d]\n",
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idx, count, req->req.actual, req->req.length,
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is_last, req->req.zero);
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if (is_last) {
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/* The order is important. It prevents sending 2 packets
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* at the same time */
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if (idx == 0) {
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/* Reset signal => no need to say 'data sent' */
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if (!(udc_read(S3C2410_UDC_USB_INT_REG)
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& S3C2410_UDC_USBINT_RESET))
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s3c2410_udc_set_ep0_de_in(base_addr);
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ep->dev->ep0state = EP0_IDLE;
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} else {
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udc_write(idx, S3C2410_UDC_INDEX_REG);
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ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
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udc_write(idx, S3C2410_UDC_INDEX_REG);
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udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
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S3C2410_UDC_IN_CSR1_REG);
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}
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s3c2410_udc_done(ep, req, 0);
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is_last = 1;
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} else {
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if (idx == 0) {
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/* Reset signal => no need to say 'data sent' */
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if (!(udc_read(S3C2410_UDC_USB_INT_REG)
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& S3C2410_UDC_USBINT_RESET))
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s3c2410_udc_set_ep0_ipr(base_addr);
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} else {
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udc_write(idx, S3C2410_UDC_INDEX_REG);
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ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
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udc_write(idx, S3C2410_UDC_INDEX_REG);
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udc_write(ep_csr | S3C2410_UDC_ICSR1_PKTRDY,
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S3C2410_UDC_IN_CSR1_REG);
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}
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}
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return is_last;
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}
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static inline int s3c2410_udc_read_packet(int fifo, u8 *buf,
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struct s3c2410_request *req, unsigned avail)
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{
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unsigned len;
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len = min(req->req.length - req->req.actual, avail);
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req->req.actual += len;
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readsb(fifo + base_addr, buf, len);
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return len;
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}
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/*
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* return: 0 = still running, 1 = queue empty, negative = errno
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*/
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static int s3c2410_udc_read_fifo(struct s3c2410_ep *ep,
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struct s3c2410_request *req)
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{
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u8 *buf;
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u32 ep_csr;
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unsigned bufferspace;
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int is_last = 1;
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unsigned avail;
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int fifo_count = 0;
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u32 idx;
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int fifo_reg;
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idx = ep->bEndpointAddress & 0x7F;
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switch (idx) {
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default:
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idx = 0;
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case 0:
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fifo_reg = S3C2410_UDC_EP0_FIFO_REG;
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break;
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case 1:
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fifo_reg = S3C2410_UDC_EP1_FIFO_REG;
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break;
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case 2:
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fifo_reg = S3C2410_UDC_EP2_FIFO_REG;
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break;
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case 3:
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fifo_reg = S3C2410_UDC_EP3_FIFO_REG;
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break;
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case 4:
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fifo_reg = S3C2410_UDC_EP4_FIFO_REG;
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break;
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}
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if (!req->req.length)
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return 1;
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|
|
buf = req->req.buf + req->req.actual;
|
|
bufferspace = req->req.length - req->req.actual;
|
|
if (!bufferspace) {
|
|
dprintk(DEBUG_NORMAL, "%s: buffer full!\n", __func__);
|
|
return -1;
|
|
}
|
|
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
|
|
fifo_count = s3c2410_udc_fifo_count_out();
|
|
dprintk(DEBUG_NORMAL, "%s fifo count : %d\n", __func__, fifo_count);
|
|
|
|
if (fifo_count > ep->ep.maxpacket)
|
|
avail = ep->ep.maxpacket;
|
|
else
|
|
avail = fifo_count;
|
|
|
|
fifo_count = s3c2410_udc_read_packet(fifo_reg, buf, req, avail);
|
|
|
|
/* checking this with ep0 is not accurate as we already
|
|
* read a control request
|
|
**/
|
|
if (idx != 0 && fifo_count < ep->ep.maxpacket) {
|
|
is_last = 1;
|
|
/* overflowed this request? flush extra data */
|
|
if (fifo_count != avail)
|
|
req->req.status = -EOVERFLOW;
|
|
} else {
|
|
is_last = (req->req.length <= req->req.actual) ? 1 : 0;
|
|
}
|
|
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
fifo_count = s3c2410_udc_fifo_count_out();
|
|
|
|
/* Only ep0 debug messages are interesting */
|
|
if (idx == 0)
|
|
dprintk(DEBUG_VERBOSE, "%s fifo count : %d [last %d]\n",
|
|
__func__, fifo_count, is_last);
|
|
|
|
if (is_last) {
|
|
if (idx == 0) {
|
|
s3c2410_udc_set_ep0_de_out(base_addr);
|
|
ep->dev->ep0state = EP0_IDLE;
|
|
} else {
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
|
|
S3C2410_UDC_OUT_CSR1_REG);
|
|
}
|
|
|
|
s3c2410_udc_done(ep, req, 0);
|
|
} else {
|
|
if (idx == 0) {
|
|
s3c2410_udc_clear_ep0_opr(base_addr);
|
|
} else {
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
ep_csr = udc_read(S3C2410_UDC_OUT_CSR1_REG);
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
udc_write(ep_csr & ~S3C2410_UDC_OCSR1_PKTRDY,
|
|
S3C2410_UDC_OUT_CSR1_REG);
|
|
}
|
|
}
|
|
|
|
return is_last;
|
|
}
|
|
|
|
static int s3c2410_udc_read_fifo_crq(struct usb_ctrlrequest *crq)
|
|
{
|
|
unsigned char *outbuf = (unsigned char *)crq;
|
|
int bytes_read = 0;
|
|
|
|
udc_write(0, S3C2410_UDC_INDEX_REG);
|
|
|
|
bytes_read = s3c2410_udc_fifo_count_out();
|
|
|
|
dprintk(DEBUG_NORMAL, "%s: fifo_count=%d\n", __func__, bytes_read);
|
|
|
|
if (bytes_read > sizeof(struct usb_ctrlrequest))
|
|
bytes_read = sizeof(struct usb_ctrlrequest);
|
|
|
|
readsb(S3C2410_UDC_EP0_FIFO_REG + base_addr, outbuf, bytes_read);
|
|
|
|
dprintk(DEBUG_VERBOSE, "%s: len=%d %02x:%02x {%x,%x,%x}\n", __func__,
|
|
bytes_read, crq->bRequest, crq->bRequestType,
|
|
crq->wValue, crq->wIndex, crq->wLength);
|
|
|
|
return bytes_read;
|
|
}
|
|
|
|
static int s3c2410_udc_get_status(struct s3c2410_udc *dev,
|
|
struct usb_ctrlrequest *crq)
|
|
{
|
|
u16 status = 0;
|
|
u8 ep_num = crq->wIndex & 0x7F;
|
|
u8 is_in = crq->wIndex & USB_DIR_IN;
|
|
|
|
switch (crq->bRequestType & USB_RECIP_MASK) {
|
|
case USB_RECIP_INTERFACE:
|
|
break;
|
|
|
|
case USB_RECIP_DEVICE:
|
|
status = dev->devstatus;
|
|
break;
|
|
|
|
case USB_RECIP_ENDPOINT:
|
|
if (ep_num > 4 || crq->wLength > 2)
|
|
return 1;
|
|
|
|
if (ep_num == 0) {
|
|
udc_write(0, S3C2410_UDC_INDEX_REG);
|
|
status = udc_read(S3C2410_UDC_IN_CSR1_REG);
|
|
status = status & S3C2410_UDC_EP0_CSR_SENDSTL;
|
|
} else {
|
|
udc_write(ep_num, S3C2410_UDC_INDEX_REG);
|
|
if (is_in) {
|
|
status = udc_read(S3C2410_UDC_IN_CSR1_REG);
|
|
status = status & S3C2410_UDC_ICSR1_SENDSTL;
|
|
} else {
|
|
status = udc_read(S3C2410_UDC_OUT_CSR1_REG);
|
|
status = status & S3C2410_UDC_OCSR1_SENDSTL;
|
|
}
|
|
}
|
|
|
|
status = status ? 1 : 0;
|
|
break;
|
|
|
|
default:
|
|
return 1;
|
|
}
|
|
|
|
/* Seems to be needed to get it working. ouch :( */
|
|
udelay(5);
|
|
udc_write(status & 0xFF, S3C2410_UDC_EP0_FIFO_REG);
|
|
udc_write(status >> 8, S3C2410_UDC_EP0_FIFO_REG);
|
|
s3c2410_udc_set_ep0_de_in(base_addr);
|
|
|
|
return 0;
|
|
}
|
|
/*------------------------- usb state machine -------------------------------*/
|
|
static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value);
|
|
|
|
static void s3c2410_udc_handle_ep0_idle(struct s3c2410_udc *dev,
|
|
struct s3c2410_ep *ep,
|
|
struct usb_ctrlrequest *crq,
|
|
u32 ep0csr)
|
|
{
|
|
int len, ret, tmp;
|
|
|
|
/* start control request? */
|
|
if (!(ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY))
|
|
return;
|
|
|
|
s3c2410_udc_nuke(dev, ep, -EPROTO);
|
|
|
|
len = s3c2410_udc_read_fifo_crq(crq);
|
|
if (len != sizeof(*crq)) {
|
|
dprintk(DEBUG_NORMAL, "setup begin: fifo READ ERROR"
|
|
" wanted %d bytes got %d. Stalling out...\n",
|
|
sizeof(*crq), len);
|
|
s3c2410_udc_set_ep0_ss(base_addr);
|
|
return;
|
|
}
|
|
|
|
dprintk(DEBUG_NORMAL, "bRequest = %d bRequestType %d wLength = %d\n",
|
|
crq->bRequest, crq->bRequestType, crq->wLength);
|
|
|
|
/* cope with automagic for some standard requests. */
|
|
dev->req_std = (crq->bRequestType & USB_TYPE_MASK)
|
|
== USB_TYPE_STANDARD;
|
|
dev->req_config = 0;
|
|
dev->req_pending = 1;
|
|
|
|
switch (crq->bRequest) {
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
dprintk(DEBUG_NORMAL, "USB_REQ_SET_CONFIGURATION ...\n");
|
|
|
|
if (crq->bRequestType == USB_RECIP_DEVICE) {
|
|
dev->req_config = 1;
|
|
s3c2410_udc_set_ep0_de_out(base_addr);
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_SET_INTERFACE:
|
|
dprintk(DEBUG_NORMAL, "USB_REQ_SET_INTERFACE ...\n");
|
|
|
|
if (crq->bRequestType == USB_RECIP_INTERFACE) {
|
|
dev->req_config = 1;
|
|
s3c2410_udc_set_ep0_de_out(base_addr);
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_SET_ADDRESS:
|
|
dprintk(DEBUG_NORMAL, "USB_REQ_SET_ADDRESS ...\n");
|
|
|
|
if (crq->bRequestType == USB_RECIP_DEVICE) {
|
|
tmp = crq->wValue & 0x7F;
|
|
dev->address = tmp;
|
|
udc_write((tmp | S3C2410_UDC_FUNCADDR_UPDATE),
|
|
S3C2410_UDC_FUNC_ADDR_REG);
|
|
s3c2410_udc_set_ep0_de_out(base_addr);
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_GET_STATUS:
|
|
dprintk(DEBUG_NORMAL, "USB_REQ_GET_STATUS ...\n");
|
|
s3c2410_udc_clear_ep0_opr(base_addr);
|
|
|
|
if (dev->req_std) {
|
|
if (!s3c2410_udc_get_status(dev, crq))
|
|
return;
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_CLEAR_FEATURE:
|
|
s3c2410_udc_clear_ep0_opr(base_addr);
|
|
|
|
if (crq->bRequestType != USB_RECIP_ENDPOINT)
|
|
break;
|
|
|
|
if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
|
|
break;
|
|
|
|
s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 0);
|
|
s3c2410_udc_set_ep0_de_out(base_addr);
|
|
return;
|
|
|
|
case USB_REQ_SET_FEATURE:
|
|
s3c2410_udc_clear_ep0_opr(base_addr);
|
|
|
|
if (crq->bRequestType != USB_RECIP_ENDPOINT)
|
|
break;
|
|
|
|
if (crq->wValue != USB_ENDPOINT_HALT || crq->wLength != 0)
|
|
break;
|
|
|
|
s3c2410_udc_set_halt(&dev->ep[crq->wIndex & 0x7f].ep, 1);
|
|
s3c2410_udc_set_ep0_de_out(base_addr);
|
|
return;
|
|
|
|
default:
|
|
s3c2410_udc_clear_ep0_opr(base_addr);
|
|
break;
|
|
}
|
|
|
|
if (crq->bRequestType & USB_DIR_IN)
|
|
dev->ep0state = EP0_IN_DATA_PHASE;
|
|
else
|
|
dev->ep0state = EP0_OUT_DATA_PHASE;
|
|
|
|
if (!dev->driver)
|
|
return;
|
|
|
|
/* deliver the request to the gadget driver */
|
|
ret = dev->driver->setup(&dev->gadget, crq);
|
|
if (ret < 0) {
|
|
if (dev->req_config) {
|
|
dprintk(DEBUG_NORMAL, "config change %02x fail %d?\n",
|
|
crq->bRequest, ret);
|
|
return;
|
|
}
|
|
|
|
if (ret == -EOPNOTSUPP)
|
|
dprintk(DEBUG_NORMAL, "Operation not supported\n");
|
|
else
|
|
dprintk(DEBUG_NORMAL,
|
|
"dev->driver->setup failed. (%d)\n", ret);
|
|
|
|
udelay(5);
|
|
s3c2410_udc_set_ep0_ss(base_addr);
|
|
s3c2410_udc_set_ep0_de_out(base_addr);
|
|
dev->ep0state = EP0_IDLE;
|
|
/* deferred i/o == no response yet */
|
|
} else if (dev->req_pending) {
|
|
dprintk(DEBUG_VERBOSE, "dev->req_pending... what now?\n");
|
|
dev->req_pending = 0;
|
|
}
|
|
|
|
dprintk(DEBUG_VERBOSE, "ep0state %s\n", ep0states[dev->ep0state]);
|
|
}
|
|
|
|
static void s3c2410_udc_handle_ep0(struct s3c2410_udc *dev)
|
|
{
|
|
u32 ep0csr;
|
|
struct s3c2410_ep *ep = &dev->ep[0];
|
|
struct s3c2410_request *req;
|
|
struct usb_ctrlrequest crq;
|
|
|
|
if (list_empty(&ep->queue))
|
|
req = NULL;
|
|
else
|
|
req = list_entry(ep->queue.next, struct s3c2410_request, queue);
|
|
|
|
/* We make the assumption that S3C2410_UDC_IN_CSR1_REG equal to
|
|
* S3C2410_UDC_EP0_CSR_REG when index is zero */
|
|
|
|
udc_write(0, S3C2410_UDC_INDEX_REG);
|
|
ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
|
|
|
|
dprintk(DEBUG_NORMAL, "ep0csr %x ep0state %s\n",
|
|
ep0csr, ep0states[dev->ep0state]);
|
|
|
|
/* clear stall status */
|
|
if (ep0csr & S3C2410_UDC_EP0_CSR_SENTSTL) {
|
|
s3c2410_udc_nuke(dev, ep, -EPIPE);
|
|
dprintk(DEBUG_NORMAL, "... clear SENT_STALL ...\n");
|
|
s3c2410_udc_clear_ep0_sst(base_addr);
|
|
dev->ep0state = EP0_IDLE;
|
|
return;
|
|
}
|
|
|
|
/* clear setup end */
|
|
if (ep0csr & S3C2410_UDC_EP0_CSR_SE) {
|
|
dprintk(DEBUG_NORMAL, "... serviced SETUP_END ...\n");
|
|
s3c2410_udc_nuke(dev, ep, 0);
|
|
s3c2410_udc_clear_ep0_se(base_addr);
|
|
dev->ep0state = EP0_IDLE;
|
|
}
|
|
|
|
switch (dev->ep0state) {
|
|
case EP0_IDLE:
|
|
s3c2410_udc_handle_ep0_idle(dev, ep, &crq, ep0csr);
|
|
break;
|
|
|
|
case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR etc */
|
|
dprintk(DEBUG_NORMAL, "EP0_IN_DATA_PHASE ... what now?\n");
|
|
if (!(ep0csr & S3C2410_UDC_EP0_CSR_IPKRDY) && req)
|
|
s3c2410_udc_write_fifo(ep, req);
|
|
break;
|
|
|
|
case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR etc */
|
|
dprintk(DEBUG_NORMAL, "EP0_OUT_DATA_PHASE ... what now?\n");
|
|
if ((ep0csr & S3C2410_UDC_EP0_CSR_OPKRDY) && req)
|
|
s3c2410_udc_read_fifo(ep, req);
|
|
break;
|
|
|
|
case EP0_END_XFER:
|
|
dprintk(DEBUG_NORMAL, "EP0_END_XFER ... what now?\n");
|
|
dev->ep0state = EP0_IDLE;
|
|
break;
|
|
|
|
case EP0_STALL:
|
|
dprintk(DEBUG_NORMAL, "EP0_STALL ... what now?\n");
|
|
dev->ep0state = EP0_IDLE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* handle_ep - Manage I/O endpoints
|
|
*/
|
|
|
|
static void s3c2410_udc_handle_ep(struct s3c2410_ep *ep)
|
|
{
|
|
struct s3c2410_request *req;
|
|
int is_in = ep->bEndpointAddress & USB_DIR_IN;
|
|
u32 ep_csr1;
|
|
u32 idx;
|
|
|
|
if (likely(!list_empty(&ep->queue)))
|
|
req = list_entry(ep->queue.next,
|
|
struct s3c2410_request, queue);
|
|
else
|
|
req = NULL;
|
|
|
|
idx = ep->bEndpointAddress & 0x7F;
|
|
|
|
if (is_in) {
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
ep_csr1 = udc_read(S3C2410_UDC_IN_CSR1_REG);
|
|
dprintk(DEBUG_VERBOSE, "ep%01d write csr:%02x %d\n",
|
|
idx, ep_csr1, req ? 1 : 0);
|
|
|
|
if (ep_csr1 & S3C2410_UDC_ICSR1_SENTSTL) {
|
|
dprintk(DEBUG_VERBOSE, "st\n");
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
udc_write(ep_csr1 & ~S3C2410_UDC_ICSR1_SENTSTL,
|
|
S3C2410_UDC_IN_CSR1_REG);
|
|
return;
|
|
}
|
|
|
|
if (!(ep_csr1 & S3C2410_UDC_ICSR1_PKTRDY) && req)
|
|
s3c2410_udc_write_fifo(ep, req);
|
|
} else {
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
ep_csr1 = udc_read(S3C2410_UDC_OUT_CSR1_REG);
|
|
dprintk(DEBUG_VERBOSE, "ep%01d rd csr:%02x\n", idx, ep_csr1);
|
|
|
|
if (ep_csr1 & S3C2410_UDC_OCSR1_SENTSTL) {
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
udc_write(ep_csr1 & ~S3C2410_UDC_OCSR1_SENTSTL,
|
|
S3C2410_UDC_OUT_CSR1_REG);
|
|
return;
|
|
}
|
|
|
|
if ((ep_csr1 & S3C2410_UDC_OCSR1_PKTRDY) && req)
|
|
s3c2410_udc_read_fifo(ep, req);
|
|
}
|
|
}
|
|
|
|
#include <mach/regs-irq.h>
|
|
|
|
/*
|
|
* s3c2410_udc_irq - interrupt handler
|
|
*/
|
|
static irqreturn_t s3c2410_udc_irq(int dummy, void *_dev)
|
|
{
|
|
struct s3c2410_udc *dev = _dev;
|
|
int usb_status;
|
|
int usbd_status;
|
|
int pwr_reg;
|
|
int ep0csr;
|
|
int i;
|
|
u32 idx, idx2;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
|
|
/* Driver connected ? */
|
|
if (!dev->driver) {
|
|
/* Clear interrupts */
|
|
udc_write(udc_read(S3C2410_UDC_USB_INT_REG),
|
|
S3C2410_UDC_USB_INT_REG);
|
|
udc_write(udc_read(S3C2410_UDC_EP_INT_REG),
|
|
S3C2410_UDC_EP_INT_REG);
|
|
}
|
|
|
|
/* Save index */
|
|
idx = udc_read(S3C2410_UDC_INDEX_REG);
|
|
|
|
/* Read status registers */
|
|
usb_status = udc_read(S3C2410_UDC_USB_INT_REG);
|
|
usbd_status = udc_read(S3C2410_UDC_EP_INT_REG);
|
|
pwr_reg = udc_read(S3C2410_UDC_PWR_REG);
|
|
|
|
udc_writeb(base_addr, S3C2410_UDC_INDEX_EP0, S3C2410_UDC_INDEX_REG);
|
|
ep0csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
|
|
|
|
dprintk(DEBUG_NORMAL, "usbs=%02x, usbds=%02x, pwr=%02x ep0csr=%02x\n",
|
|
usb_status, usbd_status, pwr_reg, ep0csr);
|
|
|
|
/*
|
|
* Now, handle interrupts. There's two types :
|
|
* - Reset, Resume, Suspend coming -> usb_int_reg
|
|
* - EP -> ep_int_reg
|
|
*/
|
|
|
|
/* RESET */
|
|
if (usb_status & S3C2410_UDC_USBINT_RESET) {
|
|
/* two kind of reset :
|
|
* - reset start -> pwr reg = 8
|
|
* - reset end -> pwr reg = 0
|
|
**/
|
|
dprintk(DEBUG_NORMAL, "USB reset csr %x pwr %x\n",
|
|
ep0csr, pwr_reg);
|
|
|
|
dev->gadget.speed = USB_SPEED_UNKNOWN;
|
|
udc_write(0x00, S3C2410_UDC_INDEX_REG);
|
|
udc_write((dev->ep[0].ep.maxpacket & 0x7ff) >> 3,
|
|
S3C2410_UDC_MAXP_REG);
|
|
dev->address = 0;
|
|
|
|
dev->ep0state = EP0_IDLE;
|
|
dev->gadget.speed = USB_SPEED_FULL;
|
|
|
|
/* clear interrupt */
|
|
udc_write(S3C2410_UDC_USBINT_RESET,
|
|
S3C2410_UDC_USB_INT_REG);
|
|
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* RESUME */
|
|
if (usb_status & S3C2410_UDC_USBINT_RESUME) {
|
|
dprintk(DEBUG_NORMAL, "USB resume\n");
|
|
|
|
/* clear interrupt */
|
|
udc_write(S3C2410_UDC_USBINT_RESUME,
|
|
S3C2410_UDC_USB_INT_REG);
|
|
|
|
if (dev->gadget.speed != USB_SPEED_UNKNOWN
|
|
&& dev->driver
|
|
&& dev->driver->resume)
|
|
dev->driver->resume(&dev->gadget);
|
|
}
|
|
|
|
/* SUSPEND */
|
|
if (usb_status & S3C2410_UDC_USBINT_SUSPEND) {
|
|
dprintk(DEBUG_NORMAL, "USB suspend\n");
|
|
|
|
/* clear interrupt */
|
|
udc_write(S3C2410_UDC_USBINT_SUSPEND,
|
|
S3C2410_UDC_USB_INT_REG);
|
|
|
|
if (dev->gadget.speed != USB_SPEED_UNKNOWN
|
|
&& dev->driver
|
|
&& dev->driver->suspend)
|
|
dev->driver->suspend(&dev->gadget);
|
|
|
|
dev->ep0state = EP0_IDLE;
|
|
}
|
|
|
|
/* EP */
|
|
/* control traffic */
|
|
/* check on ep0csr != 0 is not a good idea as clearing in_pkt_ready
|
|
* generate an interrupt
|
|
*/
|
|
if (usbd_status & S3C2410_UDC_INT_EP0) {
|
|
dprintk(DEBUG_VERBOSE, "USB ep0 irq\n");
|
|
/* Clear the interrupt bit by setting it to 1 */
|
|
udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_REG);
|
|
s3c2410_udc_handle_ep0(dev);
|
|
}
|
|
|
|
/* endpoint data transfers */
|
|
for (i = 1; i < S3C2410_ENDPOINTS; i++) {
|
|
u32 tmp = 1 << i;
|
|
if (usbd_status & tmp) {
|
|
dprintk(DEBUG_VERBOSE, "USB ep%d irq\n", i);
|
|
|
|
/* Clear the interrupt bit by setting it to 1 */
|
|
udc_write(tmp, S3C2410_UDC_EP_INT_REG);
|
|
s3c2410_udc_handle_ep(&dev->ep[i]);
|
|
}
|
|
}
|
|
|
|
/* what else causes this interrupt? a receive! who is it? */
|
|
if (!usb_status && !usbd_status && !pwr_reg && !ep0csr) {
|
|
for (i = 1; i < S3C2410_ENDPOINTS; i++) {
|
|
idx2 = udc_read(S3C2410_UDC_INDEX_REG);
|
|
udc_write(i, S3C2410_UDC_INDEX_REG);
|
|
|
|
if (udc_read(S3C2410_UDC_OUT_CSR1_REG) & 0x1)
|
|
s3c2410_udc_handle_ep(&dev->ep[i]);
|
|
|
|
/* restore index */
|
|
udc_write(idx2, S3C2410_UDC_INDEX_REG);
|
|
}
|
|
}
|
|
|
|
dprintk(DEBUG_VERBOSE, "irq: %d s3c2410_udc_done.\n", IRQ_USBD);
|
|
|
|
/* Restore old index */
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
/*------------------------- s3c2410_ep_ops ----------------------------------*/
|
|
|
|
static inline struct s3c2410_ep *to_s3c2410_ep(struct usb_ep *ep)
|
|
{
|
|
return container_of(ep, struct s3c2410_ep, ep);
|
|
}
|
|
|
|
static inline struct s3c2410_udc *to_s3c2410_udc(struct usb_gadget *gadget)
|
|
{
|
|
return container_of(gadget, struct s3c2410_udc, gadget);
|
|
}
|
|
|
|
static inline struct s3c2410_request *to_s3c2410_req(struct usb_request *req)
|
|
{
|
|
return container_of(req, struct s3c2410_request, req);
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_ep_enable
|
|
*/
|
|
static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
|
|
const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
struct s3c2410_udc *dev;
|
|
struct s3c2410_ep *ep;
|
|
u32 max, tmp;
|
|
unsigned long flags;
|
|
u32 csr1, csr2;
|
|
u32 int_en_reg;
|
|
|
|
ep = to_s3c2410_ep(_ep);
|
|
|
|
if (!_ep || !desc
|
|
|| _ep->name == ep0name
|
|
|| desc->bDescriptorType != USB_DT_ENDPOINT)
|
|
return -EINVAL;
|
|
|
|
dev = ep->dev;
|
|
if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
|
|
return -ESHUTDOWN;
|
|
|
|
max = usb_endpoint_maxp(desc);
|
|
|
|
local_irq_save(flags);
|
|
_ep->maxpacket = max;
|
|
ep->ep.desc = desc;
|
|
ep->halted = 0;
|
|
ep->bEndpointAddress = desc->bEndpointAddress;
|
|
|
|
/* set max packet */
|
|
udc_write(ep->num, S3C2410_UDC_INDEX_REG);
|
|
udc_write(max >> 3, S3C2410_UDC_MAXP_REG);
|
|
|
|
/* set type, direction, address; reset fifo counters */
|
|
if (desc->bEndpointAddress & USB_DIR_IN) {
|
|
csr1 = S3C2410_UDC_ICSR1_FFLUSH|S3C2410_UDC_ICSR1_CLRDT;
|
|
csr2 = S3C2410_UDC_ICSR2_MODEIN|S3C2410_UDC_ICSR2_DMAIEN;
|
|
|
|
udc_write(ep->num, S3C2410_UDC_INDEX_REG);
|
|
udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
|
|
udc_write(ep->num, S3C2410_UDC_INDEX_REG);
|
|
udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
|
|
} else {
|
|
/* don't flush in fifo or it will cause endpoint interrupt */
|
|
csr1 = S3C2410_UDC_ICSR1_CLRDT;
|
|
csr2 = S3C2410_UDC_ICSR2_DMAIEN;
|
|
|
|
udc_write(ep->num, S3C2410_UDC_INDEX_REG);
|
|
udc_write(csr1, S3C2410_UDC_IN_CSR1_REG);
|
|
udc_write(ep->num, S3C2410_UDC_INDEX_REG);
|
|
udc_write(csr2, S3C2410_UDC_IN_CSR2_REG);
|
|
|
|
csr1 = S3C2410_UDC_OCSR1_FFLUSH | S3C2410_UDC_OCSR1_CLRDT;
|
|
csr2 = S3C2410_UDC_OCSR2_DMAIEN;
|
|
|
|
udc_write(ep->num, S3C2410_UDC_INDEX_REG);
|
|
udc_write(csr1, S3C2410_UDC_OUT_CSR1_REG);
|
|
udc_write(ep->num, S3C2410_UDC_INDEX_REG);
|
|
udc_write(csr2, S3C2410_UDC_OUT_CSR2_REG);
|
|
}
|
|
|
|
/* enable irqs */
|
|
int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
|
|
udc_write(int_en_reg | (1 << ep->num), S3C2410_UDC_EP_INT_EN_REG);
|
|
|
|
/* print some debug message */
|
|
tmp = desc->bEndpointAddress;
|
|
dprintk(DEBUG_NORMAL, "enable %s(%d) ep%x%s-blk max %02x\n",
|
|
_ep->name, ep->num, tmp,
|
|
desc->bEndpointAddress & USB_DIR_IN ? "in" : "out", max);
|
|
|
|
local_irq_restore(flags);
|
|
s3c2410_udc_set_halt(_ep, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_ep_disable
|
|
*/
|
|
static int s3c2410_udc_ep_disable(struct usb_ep *_ep)
|
|
{
|
|
struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
|
|
unsigned long flags;
|
|
u32 int_en_reg;
|
|
|
|
if (!_ep || !ep->ep.desc) {
|
|
dprintk(DEBUG_NORMAL, "%s not enabled\n",
|
|
_ep ? ep->ep.name : NULL);
|
|
return -EINVAL;
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
|
|
dprintk(DEBUG_NORMAL, "ep_disable: %s\n", _ep->name);
|
|
|
|
ep->ep.desc = NULL;
|
|
ep->halted = 1;
|
|
|
|
s3c2410_udc_nuke(ep->dev, ep, -ESHUTDOWN);
|
|
|
|
/* disable irqs */
|
|
int_en_reg = udc_read(S3C2410_UDC_EP_INT_EN_REG);
|
|
udc_write(int_en_reg & ~(1<<ep->num), S3C2410_UDC_EP_INT_EN_REG);
|
|
|
|
local_irq_restore(flags);
|
|
|
|
dprintk(DEBUG_NORMAL, "%s disabled\n", _ep->name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_alloc_request
|
|
*/
|
|
static struct usb_request *
|
|
s3c2410_udc_alloc_request(struct usb_ep *_ep, gfp_t mem_flags)
|
|
{
|
|
struct s3c2410_request *req;
|
|
|
|
dprintk(DEBUG_VERBOSE, "%s(%p,%d)\n", __func__, _ep, mem_flags);
|
|
|
|
if (!_ep)
|
|
return NULL;
|
|
|
|
req = kzalloc(sizeof(struct s3c2410_request), mem_flags);
|
|
if (!req)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&req->queue);
|
|
return &req->req;
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_free_request
|
|
*/
|
|
static void
|
|
s3c2410_udc_free_request(struct usb_ep *_ep, struct usb_request *_req)
|
|
{
|
|
struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
|
|
struct s3c2410_request *req = to_s3c2410_req(_req);
|
|
|
|
dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
|
|
|
|
if (!ep || !_req || (!ep->ep.desc && _ep->name != ep0name))
|
|
return;
|
|
|
|
WARN_ON(!list_empty(&req->queue));
|
|
kfree(req);
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_queue
|
|
*/
|
|
static int s3c2410_udc_queue(struct usb_ep *_ep, struct usb_request *_req,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct s3c2410_request *req = to_s3c2410_req(_req);
|
|
struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
|
|
struct s3c2410_udc *dev;
|
|
u32 ep_csr = 0;
|
|
int fifo_count = 0;
|
|
unsigned long flags;
|
|
|
|
if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
|
|
dprintk(DEBUG_NORMAL, "%s: invalid args\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev = ep->dev;
|
|
if (unlikely(!dev->driver
|
|
|| dev->gadget.speed == USB_SPEED_UNKNOWN)) {
|
|
return -ESHUTDOWN;
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
|
|
if (unlikely(!_req || !_req->complete
|
|
|| !_req->buf || !list_empty(&req->queue))) {
|
|
if (!_req)
|
|
dprintk(DEBUG_NORMAL, "%s: 1 X X X\n", __func__);
|
|
else {
|
|
dprintk(DEBUG_NORMAL, "%s: 0 %01d %01d %01d\n",
|
|
__func__, !_req->complete, !_req->buf,
|
|
!list_empty(&req->queue));
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
return -EINVAL;
|
|
}
|
|
|
|
_req->status = -EINPROGRESS;
|
|
_req->actual = 0;
|
|
|
|
dprintk(DEBUG_VERBOSE, "%s: ep%x len %d\n",
|
|
__func__, ep->bEndpointAddress, _req->length);
|
|
|
|
if (ep->bEndpointAddress) {
|
|
udc_write(ep->bEndpointAddress & 0x7F, S3C2410_UDC_INDEX_REG);
|
|
|
|
ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
|
|
? S3C2410_UDC_IN_CSR1_REG
|
|
: S3C2410_UDC_OUT_CSR1_REG);
|
|
fifo_count = s3c2410_udc_fifo_count_out();
|
|
} else {
|
|
udc_write(0, S3C2410_UDC_INDEX_REG);
|
|
ep_csr = udc_read(S3C2410_UDC_IN_CSR1_REG);
|
|
fifo_count = s3c2410_udc_fifo_count_out();
|
|
}
|
|
|
|
/* kickstart this i/o queue? */
|
|
if (list_empty(&ep->queue) && !ep->halted) {
|
|
if (ep->bEndpointAddress == 0 /* ep0 */) {
|
|
switch (dev->ep0state) {
|
|
case EP0_IN_DATA_PHASE:
|
|
if (!(ep_csr&S3C2410_UDC_EP0_CSR_IPKRDY)
|
|
&& s3c2410_udc_write_fifo(ep,
|
|
req)) {
|
|
dev->ep0state = EP0_IDLE;
|
|
req = NULL;
|
|
}
|
|
break;
|
|
|
|
case EP0_OUT_DATA_PHASE:
|
|
if ((!_req->length)
|
|
|| ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
|
|
&& s3c2410_udc_read_fifo(ep,
|
|
req))) {
|
|
dev->ep0state = EP0_IDLE;
|
|
req = NULL;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
local_irq_restore(flags);
|
|
return -EL2HLT;
|
|
}
|
|
} else if ((ep->bEndpointAddress & USB_DIR_IN) != 0
|
|
&& (!(ep_csr&S3C2410_UDC_OCSR1_PKTRDY))
|
|
&& s3c2410_udc_write_fifo(ep, req)) {
|
|
req = NULL;
|
|
} else if ((ep_csr & S3C2410_UDC_OCSR1_PKTRDY)
|
|
&& fifo_count
|
|
&& s3c2410_udc_read_fifo(ep, req)) {
|
|
req = NULL;
|
|
}
|
|
}
|
|
|
|
/* pio or dma irq handler advances the queue. */
|
|
if (likely(req))
|
|
list_add_tail(&req->queue, &ep->queue);
|
|
|
|
local_irq_restore(flags);
|
|
|
|
dprintk(DEBUG_VERBOSE, "%s ok\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_dequeue
|
|
*/
|
|
static int s3c2410_udc_dequeue(struct usb_ep *_ep, struct usb_request *_req)
|
|
{
|
|
struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
|
|
struct s3c2410_udc *udc;
|
|
int retval = -EINVAL;
|
|
unsigned long flags;
|
|
struct s3c2410_request *req = NULL;
|
|
|
|
dprintk(DEBUG_VERBOSE, "%s(%p,%p)\n", __func__, _ep, _req);
|
|
|
|
if (!the_controller->driver)
|
|
return -ESHUTDOWN;
|
|
|
|
if (!_ep || !_req)
|
|
return retval;
|
|
|
|
udc = to_s3c2410_udc(ep->gadget);
|
|
|
|
local_irq_save(flags);
|
|
|
|
list_for_each_entry(req, &ep->queue, queue) {
|
|
if (&req->req == _req) {
|
|
list_del_init(&req->queue);
|
|
_req->status = -ECONNRESET;
|
|
retval = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (retval == 0) {
|
|
dprintk(DEBUG_VERBOSE,
|
|
"dequeued req %p from %s, len %d buf %p\n",
|
|
req, _ep->name, _req->length, _req->buf);
|
|
|
|
s3c2410_udc_done(ep, req, -ECONNRESET);
|
|
}
|
|
|
|
local_irq_restore(flags);
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_set_halt
|
|
*/
|
|
static int s3c2410_udc_set_halt(struct usb_ep *_ep, int value)
|
|
{
|
|
struct s3c2410_ep *ep = to_s3c2410_ep(_ep);
|
|
u32 ep_csr = 0;
|
|
unsigned long flags;
|
|
u32 idx;
|
|
|
|
if (unlikely(!_ep || (!ep->ep.desc && ep->ep.name != ep0name))) {
|
|
dprintk(DEBUG_NORMAL, "%s: inval 2\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
local_irq_save(flags);
|
|
|
|
idx = ep->bEndpointAddress & 0x7F;
|
|
|
|
if (idx == 0) {
|
|
s3c2410_udc_set_ep0_ss(base_addr);
|
|
s3c2410_udc_set_ep0_de_out(base_addr);
|
|
} else {
|
|
udc_write(idx, S3C2410_UDC_INDEX_REG);
|
|
ep_csr = udc_read((ep->bEndpointAddress & USB_DIR_IN)
|
|
? S3C2410_UDC_IN_CSR1_REG
|
|
: S3C2410_UDC_OUT_CSR1_REG);
|
|
|
|
if ((ep->bEndpointAddress & USB_DIR_IN) != 0) {
|
|
if (value)
|
|
udc_write(ep_csr | S3C2410_UDC_ICSR1_SENDSTL,
|
|
S3C2410_UDC_IN_CSR1_REG);
|
|
else {
|
|
ep_csr &= ~S3C2410_UDC_ICSR1_SENDSTL;
|
|
udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
|
|
ep_csr |= S3C2410_UDC_ICSR1_CLRDT;
|
|
udc_write(ep_csr, S3C2410_UDC_IN_CSR1_REG);
|
|
}
|
|
} else {
|
|
if (value)
|
|
udc_write(ep_csr | S3C2410_UDC_OCSR1_SENDSTL,
|
|
S3C2410_UDC_OUT_CSR1_REG);
|
|
else {
|
|
ep_csr &= ~S3C2410_UDC_OCSR1_SENDSTL;
|
|
udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
|
|
ep_csr |= S3C2410_UDC_OCSR1_CLRDT;
|
|
udc_write(ep_csr, S3C2410_UDC_OUT_CSR1_REG);
|
|
}
|
|
}
|
|
}
|
|
|
|
ep->halted = value ? 1 : 0;
|
|
local_irq_restore(flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct usb_ep_ops s3c2410_ep_ops = {
|
|
.enable = s3c2410_udc_ep_enable,
|
|
.disable = s3c2410_udc_ep_disable,
|
|
|
|
.alloc_request = s3c2410_udc_alloc_request,
|
|
.free_request = s3c2410_udc_free_request,
|
|
|
|
.queue = s3c2410_udc_queue,
|
|
.dequeue = s3c2410_udc_dequeue,
|
|
|
|
.set_halt = s3c2410_udc_set_halt,
|
|
};
|
|
|
|
/*------------------------- usb_gadget_ops ----------------------------------*/
|
|
|
|
/*
|
|
* s3c2410_udc_get_frame
|
|
*/
|
|
static int s3c2410_udc_get_frame(struct usb_gadget *_gadget)
|
|
{
|
|
int tmp;
|
|
|
|
dprintk(DEBUG_VERBOSE, "%s()\n", __func__);
|
|
|
|
tmp = udc_read(S3C2410_UDC_FRAME_NUM2_REG) << 8;
|
|
tmp |= udc_read(S3C2410_UDC_FRAME_NUM1_REG);
|
|
return tmp;
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_wakeup
|
|
*/
|
|
static int s3c2410_udc_wakeup(struct usb_gadget *_gadget)
|
|
{
|
|
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_set_selfpowered
|
|
*/
|
|
static int s3c2410_udc_set_selfpowered(struct usb_gadget *gadget, int value)
|
|
{
|
|
struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
|
|
|
|
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
|
|
|
|
gadget->is_selfpowered = (value != 0);
|
|
if (value)
|
|
udc->devstatus |= (1 << USB_DEVICE_SELF_POWERED);
|
|
else
|
|
udc->devstatus &= ~(1 << USB_DEVICE_SELF_POWERED);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void s3c2410_udc_disable(struct s3c2410_udc *dev);
|
|
static void s3c2410_udc_enable(struct s3c2410_udc *dev);
|
|
|
|
static int s3c2410_udc_set_pullup(struct s3c2410_udc *udc, int is_on)
|
|
{
|
|
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
|
|
|
|
if (udc_info && (udc_info->udc_command ||
|
|
gpio_is_valid(udc_info->pullup_pin))) {
|
|
|
|
if (is_on)
|
|
s3c2410_udc_enable(udc);
|
|
else {
|
|
if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
|
|
if (udc->driver && udc->driver->disconnect)
|
|
udc->driver->disconnect(&udc->gadget);
|
|
|
|
}
|
|
s3c2410_udc_disable(udc);
|
|
}
|
|
} else {
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s3c2410_udc_vbus_session(struct usb_gadget *gadget, int is_active)
|
|
{
|
|
struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
|
|
|
|
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
|
|
|
|
udc->vbus = (is_active != 0);
|
|
s3c2410_udc_set_pullup(udc, is_active);
|
|
return 0;
|
|
}
|
|
|
|
static int s3c2410_udc_pullup(struct usb_gadget *gadget, int is_on)
|
|
{
|
|
struct s3c2410_udc *udc = to_s3c2410_udc(gadget);
|
|
|
|
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
|
|
|
|
s3c2410_udc_set_pullup(udc, is_on);
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev)
|
|
{
|
|
struct s3c2410_udc *dev = _dev;
|
|
unsigned int value;
|
|
|
|
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
|
|
|
|
value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0;
|
|
if (udc_info->vbus_pin_inverted)
|
|
value = !value;
|
|
|
|
if (value != dev->vbus)
|
|
s3c2410_udc_vbus_session(&dev->gadget, value);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int s3c2410_vbus_draw(struct usb_gadget *_gadget, unsigned ma)
|
|
{
|
|
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
|
|
|
|
if (udc_info && udc_info->vbus_draw) {
|
|
udc_info->vbus_draw(ma);
|
|
return 0;
|
|
}
|
|
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static int s3c2410_udc_start(struct usb_gadget *g,
|
|
struct usb_gadget_driver *driver);
|
|
static int s3c2410_udc_stop(struct usb_gadget *g);
|
|
|
|
static const struct usb_gadget_ops s3c2410_ops = {
|
|
.get_frame = s3c2410_udc_get_frame,
|
|
.wakeup = s3c2410_udc_wakeup,
|
|
.set_selfpowered = s3c2410_udc_set_selfpowered,
|
|
.pullup = s3c2410_udc_pullup,
|
|
.vbus_session = s3c2410_udc_vbus_session,
|
|
.vbus_draw = s3c2410_vbus_draw,
|
|
.udc_start = s3c2410_udc_start,
|
|
.udc_stop = s3c2410_udc_stop,
|
|
};
|
|
|
|
static void s3c2410_udc_command(enum s3c2410_udc_cmd_e cmd)
|
|
{
|
|
if (!udc_info)
|
|
return;
|
|
|
|
if (udc_info->udc_command) {
|
|
udc_info->udc_command(cmd);
|
|
} else if (gpio_is_valid(udc_info->pullup_pin)) {
|
|
int value;
|
|
|
|
switch (cmd) {
|
|
case S3C2410_UDC_P_ENABLE:
|
|
value = 1;
|
|
break;
|
|
case S3C2410_UDC_P_DISABLE:
|
|
value = 0;
|
|
break;
|
|
default:
|
|
return;
|
|
}
|
|
value ^= udc_info->pullup_pin_inverted;
|
|
|
|
gpio_set_value(udc_info->pullup_pin, value);
|
|
}
|
|
}
|
|
|
|
/*------------------------- gadget driver handling---------------------------*/
|
|
/*
|
|
* s3c2410_udc_disable
|
|
*/
|
|
static void s3c2410_udc_disable(struct s3c2410_udc *dev)
|
|
{
|
|
dprintk(DEBUG_NORMAL, "%s()\n", __func__);
|
|
|
|
/* Disable all interrupts */
|
|
udc_write(0x00, S3C2410_UDC_USB_INT_EN_REG);
|
|
udc_write(0x00, S3C2410_UDC_EP_INT_EN_REG);
|
|
|
|
/* Clear the interrupt registers */
|
|
udc_write(S3C2410_UDC_USBINT_RESET
|
|
| S3C2410_UDC_USBINT_RESUME
|
|
| S3C2410_UDC_USBINT_SUSPEND,
|
|
S3C2410_UDC_USB_INT_REG);
|
|
|
|
udc_write(0x1F, S3C2410_UDC_EP_INT_REG);
|
|
|
|
/* Good bye, cruel world */
|
|
s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
|
|
|
|
/* Set speed to unknown */
|
|
dev->gadget.speed = USB_SPEED_UNKNOWN;
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_reinit
|
|
*/
|
|
static void s3c2410_udc_reinit(struct s3c2410_udc *dev)
|
|
{
|
|
u32 i;
|
|
|
|
/* device/ep0 records init */
|
|
INIT_LIST_HEAD(&dev->gadget.ep_list);
|
|
INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
|
|
dev->ep0state = EP0_IDLE;
|
|
|
|
for (i = 0; i < S3C2410_ENDPOINTS; i++) {
|
|
struct s3c2410_ep *ep = &dev->ep[i];
|
|
|
|
if (i != 0)
|
|
list_add_tail(&ep->ep.ep_list, &dev->gadget.ep_list);
|
|
|
|
ep->dev = dev;
|
|
ep->ep.desc = NULL;
|
|
ep->halted = 0;
|
|
INIT_LIST_HEAD(&ep->queue);
|
|
usb_ep_set_maxpacket_limit(&ep->ep, ep->ep.maxpacket);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_enable
|
|
*/
|
|
static void s3c2410_udc_enable(struct s3c2410_udc *dev)
|
|
{
|
|
int i;
|
|
|
|
dprintk(DEBUG_NORMAL, "s3c2410_udc_enable called\n");
|
|
|
|
/* dev->gadget.speed = USB_SPEED_UNKNOWN; */
|
|
dev->gadget.speed = USB_SPEED_FULL;
|
|
|
|
/* Set MAXP for all endpoints */
|
|
for (i = 0; i < S3C2410_ENDPOINTS; i++) {
|
|
udc_write(i, S3C2410_UDC_INDEX_REG);
|
|
udc_write((dev->ep[i].ep.maxpacket & 0x7ff) >> 3,
|
|
S3C2410_UDC_MAXP_REG);
|
|
}
|
|
|
|
/* Set default power state */
|
|
udc_write(DEFAULT_POWER_STATE, S3C2410_UDC_PWR_REG);
|
|
|
|
/* Enable reset and suspend interrupt interrupts */
|
|
udc_write(S3C2410_UDC_USBINT_RESET | S3C2410_UDC_USBINT_SUSPEND,
|
|
S3C2410_UDC_USB_INT_EN_REG);
|
|
|
|
/* Enable ep0 interrupt */
|
|
udc_write(S3C2410_UDC_INT_EP0, S3C2410_UDC_EP_INT_EN_REG);
|
|
|
|
/* time to say "hello, world" */
|
|
s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
|
|
}
|
|
|
|
static int s3c2410_udc_start(struct usb_gadget *g,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
struct s3c2410_udc *udc = to_s3c2410(g);
|
|
|
|
dprintk(DEBUG_NORMAL, "%s() '%s'\n", __func__, driver->driver.name);
|
|
|
|
/* Hook the driver */
|
|
udc->driver = driver;
|
|
|
|
/* Enable udc */
|
|
s3c2410_udc_enable(udc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s3c2410_udc_stop(struct usb_gadget *g)
|
|
{
|
|
struct s3c2410_udc *udc = to_s3c2410(g);
|
|
|
|
udc->driver = NULL;
|
|
|
|
/* Disable udc */
|
|
s3c2410_udc_disable(udc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
static struct s3c2410_udc memory = {
|
|
.gadget = {
|
|
.ops = &s3c2410_ops,
|
|
.ep0 = &memory.ep[0].ep,
|
|
.name = gadget_name,
|
|
.dev = {
|
|
.init_name = "gadget",
|
|
},
|
|
},
|
|
|
|
/* control endpoint */
|
|
.ep[0] = {
|
|
.num = 0,
|
|
.ep = {
|
|
.name = ep0name,
|
|
.ops = &s3c2410_ep_ops,
|
|
.maxpacket = EP0_FIFO_SIZE,
|
|
.caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_CONTROL,
|
|
USB_EP_CAPS_DIR_ALL),
|
|
},
|
|
.dev = &memory,
|
|
},
|
|
|
|
/* first group of endpoints */
|
|
.ep[1] = {
|
|
.num = 1,
|
|
.ep = {
|
|
.name = "ep1-bulk",
|
|
.ops = &s3c2410_ep_ops,
|
|
.maxpacket = EP_FIFO_SIZE,
|
|
.caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
|
|
USB_EP_CAPS_DIR_ALL),
|
|
},
|
|
.dev = &memory,
|
|
.fifo_size = EP_FIFO_SIZE,
|
|
.bEndpointAddress = 1,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
},
|
|
.ep[2] = {
|
|
.num = 2,
|
|
.ep = {
|
|
.name = "ep2-bulk",
|
|
.ops = &s3c2410_ep_ops,
|
|
.maxpacket = EP_FIFO_SIZE,
|
|
.caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
|
|
USB_EP_CAPS_DIR_ALL),
|
|
},
|
|
.dev = &memory,
|
|
.fifo_size = EP_FIFO_SIZE,
|
|
.bEndpointAddress = 2,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
},
|
|
.ep[3] = {
|
|
.num = 3,
|
|
.ep = {
|
|
.name = "ep3-bulk",
|
|
.ops = &s3c2410_ep_ops,
|
|
.maxpacket = EP_FIFO_SIZE,
|
|
.caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
|
|
USB_EP_CAPS_DIR_ALL),
|
|
},
|
|
.dev = &memory,
|
|
.fifo_size = EP_FIFO_SIZE,
|
|
.bEndpointAddress = 3,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
},
|
|
.ep[4] = {
|
|
.num = 4,
|
|
.ep = {
|
|
.name = "ep4-bulk",
|
|
.ops = &s3c2410_ep_ops,
|
|
.maxpacket = EP_FIFO_SIZE,
|
|
.caps = USB_EP_CAPS(USB_EP_CAPS_TYPE_BULK,
|
|
USB_EP_CAPS_DIR_ALL),
|
|
},
|
|
.dev = &memory,
|
|
.fifo_size = EP_FIFO_SIZE,
|
|
.bEndpointAddress = 4,
|
|
.bmAttributes = USB_ENDPOINT_XFER_BULK,
|
|
}
|
|
|
|
};
|
|
|
|
/*
|
|
* probe - binds to the platform device
|
|
*/
|
|
static int s3c2410_udc_probe(struct platform_device *pdev)
|
|
{
|
|
struct s3c2410_udc *udc = &memory;
|
|
struct device *dev = &pdev->dev;
|
|
int retval;
|
|
int irq;
|
|
|
|
dev_dbg(dev, "%s()\n", __func__);
|
|
|
|
usb_bus_clock = clk_get(NULL, "usb-bus-gadget");
|
|
if (IS_ERR(usb_bus_clock)) {
|
|
dev_err(dev, "failed to get usb bus clock source\n");
|
|
return PTR_ERR(usb_bus_clock);
|
|
}
|
|
|
|
clk_prepare_enable(usb_bus_clock);
|
|
|
|
udc_clock = clk_get(NULL, "usb-device");
|
|
if (IS_ERR(udc_clock)) {
|
|
dev_err(dev, "failed to get udc clock source\n");
|
|
return PTR_ERR(udc_clock);
|
|
}
|
|
|
|
clk_prepare_enable(udc_clock);
|
|
|
|
mdelay(10);
|
|
|
|
dev_dbg(dev, "got and enabled clocks\n");
|
|
|
|
if (strncmp(pdev->name, "s3c2440", 7) == 0) {
|
|
dev_info(dev, "S3C2440: increasing FIFO to 128 bytes\n");
|
|
memory.ep[1].fifo_size = S3C2440_EP_FIFO_SIZE;
|
|
memory.ep[2].fifo_size = S3C2440_EP_FIFO_SIZE;
|
|
memory.ep[3].fifo_size = S3C2440_EP_FIFO_SIZE;
|
|
memory.ep[4].fifo_size = S3C2440_EP_FIFO_SIZE;
|
|
}
|
|
|
|
spin_lock_init(&udc->lock);
|
|
udc_info = dev_get_platdata(&pdev->dev);
|
|
|
|
rsrc_start = S3C2410_PA_USBDEV;
|
|
rsrc_len = S3C24XX_SZ_USBDEV;
|
|
|
|
if (!request_mem_region(rsrc_start, rsrc_len, gadget_name))
|
|
return -EBUSY;
|
|
|
|
base_addr = ioremap(rsrc_start, rsrc_len);
|
|
if (!base_addr) {
|
|
retval = -ENOMEM;
|
|
goto err_mem;
|
|
}
|
|
|
|
the_controller = udc;
|
|
platform_set_drvdata(pdev, udc);
|
|
|
|
s3c2410_udc_disable(udc);
|
|
s3c2410_udc_reinit(udc);
|
|
|
|
/* irq setup after old hardware state is cleaned up */
|
|
retval = request_irq(IRQ_USBD, s3c2410_udc_irq,
|
|
0, gadget_name, udc);
|
|
|
|
if (retval != 0) {
|
|
dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval);
|
|
retval = -EBUSY;
|
|
goto err_map;
|
|
}
|
|
|
|
dev_dbg(dev, "got irq %i\n", IRQ_USBD);
|
|
|
|
if (udc_info && udc_info->vbus_pin > 0) {
|
|
retval = gpio_request(udc_info->vbus_pin, "udc vbus");
|
|
if (retval < 0) {
|
|
dev_err(dev, "cannot claim vbus pin\n");
|
|
goto err_int;
|
|
}
|
|
|
|
irq = gpio_to_irq(udc_info->vbus_pin);
|
|
if (irq < 0) {
|
|
dev_err(dev, "no irq for gpio vbus pin\n");
|
|
retval = irq;
|
|
goto err_gpio_claim;
|
|
}
|
|
|
|
retval = request_irq(irq, s3c2410_udc_vbus_irq,
|
|
IRQF_TRIGGER_RISING
|
|
| IRQF_TRIGGER_FALLING | IRQF_SHARED,
|
|
gadget_name, udc);
|
|
|
|
if (retval != 0) {
|
|
dev_err(dev, "can't get vbus irq %d, err %d\n",
|
|
irq, retval);
|
|
retval = -EBUSY;
|
|
goto err_gpio_claim;
|
|
}
|
|
|
|
dev_dbg(dev, "got irq %i\n", irq);
|
|
} else {
|
|
udc->vbus = 1;
|
|
}
|
|
|
|
if (udc_info && !udc_info->udc_command &&
|
|
gpio_is_valid(udc_info->pullup_pin)) {
|
|
|
|
retval = gpio_request_one(udc_info->pullup_pin,
|
|
udc_info->vbus_pin_inverted ?
|
|
GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
|
|
"udc pullup");
|
|
if (retval)
|
|
goto err_vbus_irq;
|
|
}
|
|
|
|
retval = usb_add_gadget_udc(&pdev->dev, &udc->gadget);
|
|
if (retval)
|
|
goto err_add_udc;
|
|
|
|
udc->regs_info = debugfs_create_file("registers", S_IRUGO,
|
|
s3c2410_udc_debugfs_root, udc,
|
|
&s3c2410_udc_debugfs_fops);
|
|
|
|
dev_dbg(dev, "probe ok\n");
|
|
|
|
return 0;
|
|
|
|
err_add_udc:
|
|
if (udc_info && !udc_info->udc_command &&
|
|
gpio_is_valid(udc_info->pullup_pin))
|
|
gpio_free(udc_info->pullup_pin);
|
|
err_vbus_irq:
|
|
if (udc_info && udc_info->vbus_pin > 0)
|
|
free_irq(gpio_to_irq(udc_info->vbus_pin), udc);
|
|
err_gpio_claim:
|
|
if (udc_info && udc_info->vbus_pin > 0)
|
|
gpio_free(udc_info->vbus_pin);
|
|
err_int:
|
|
free_irq(IRQ_USBD, udc);
|
|
err_map:
|
|
iounmap(base_addr);
|
|
err_mem:
|
|
release_mem_region(rsrc_start, rsrc_len);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* s3c2410_udc_remove
|
|
*/
|
|
static int s3c2410_udc_remove(struct platform_device *pdev)
|
|
{
|
|
struct s3c2410_udc *udc = platform_get_drvdata(pdev);
|
|
unsigned int irq;
|
|
|
|
dev_dbg(&pdev->dev, "%s()\n", __func__);
|
|
|
|
if (udc->driver)
|
|
return -EBUSY;
|
|
|
|
usb_del_gadget_udc(&udc->gadget);
|
|
debugfs_remove(udc->regs_info);
|
|
|
|
if (udc_info && !udc_info->udc_command &&
|
|
gpio_is_valid(udc_info->pullup_pin))
|
|
gpio_free(udc_info->pullup_pin);
|
|
|
|
if (udc_info && udc_info->vbus_pin > 0) {
|
|
irq = gpio_to_irq(udc_info->vbus_pin);
|
|
free_irq(irq, udc);
|
|
}
|
|
|
|
free_irq(IRQ_USBD, udc);
|
|
|
|
iounmap(base_addr);
|
|
release_mem_region(rsrc_start, rsrc_len);
|
|
|
|
if (!IS_ERR(udc_clock) && udc_clock != NULL) {
|
|
clk_disable_unprepare(udc_clock);
|
|
clk_put(udc_clock);
|
|
udc_clock = NULL;
|
|
}
|
|
|
|
if (!IS_ERR(usb_bus_clock) && usb_bus_clock != NULL) {
|
|
clk_disable_unprepare(usb_bus_clock);
|
|
clk_put(usb_bus_clock);
|
|
usb_bus_clock = NULL;
|
|
}
|
|
|
|
dev_dbg(&pdev->dev, "%s: remove ok\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int
|
|
s3c2410_udc_suspend(struct platform_device *pdev, pm_message_t message)
|
|
{
|
|
s3c2410_udc_command(S3C2410_UDC_P_DISABLE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s3c2410_udc_resume(struct platform_device *pdev)
|
|
{
|
|
s3c2410_udc_command(S3C2410_UDC_P_ENABLE);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define s3c2410_udc_suspend NULL
|
|
#define s3c2410_udc_resume NULL
|
|
#endif
|
|
|
|
static const struct platform_device_id s3c_udc_ids[] = {
|
|
{ "s3c2410-usbgadget", },
|
|
{ "s3c2440-usbgadget", },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, s3c_udc_ids);
|
|
|
|
static struct platform_driver udc_driver_24x0 = {
|
|
.driver = {
|
|
.name = "s3c24x0-usbgadget",
|
|
},
|
|
.probe = s3c2410_udc_probe,
|
|
.remove = s3c2410_udc_remove,
|
|
.suspend = s3c2410_udc_suspend,
|
|
.resume = s3c2410_udc_resume,
|
|
.id_table = s3c_udc_ids,
|
|
};
|
|
|
|
static int __init udc_init(void)
|
|
{
|
|
int retval;
|
|
|
|
dprintk(DEBUG_NORMAL, "%s\n", gadget_name);
|
|
|
|
s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
|
|
|
|
retval = platform_driver_register(&udc_driver_24x0);
|
|
if (retval)
|
|
goto err;
|
|
|
|
return 0;
|
|
|
|
err:
|
|
debugfs_remove(s3c2410_udc_debugfs_root);
|
|
return retval;
|
|
}
|
|
|
|
static void __exit udc_exit(void)
|
|
{
|
|
platform_driver_unregister(&udc_driver_24x0);
|
|
debugfs_remove_recursive(s3c2410_udc_debugfs_root);
|
|
}
|
|
|
|
module_init(udc_init);
|
|
module_exit(udc_exit);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|