1699 lines
41 KiB
C
1699 lines
41 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* M66592 UDC (USB gadget)
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*
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* Copyright (C) 2006-2007 Renesas Solutions Corp.
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*
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* Author : Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
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*/
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include "m66592-udc.h"
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MODULE_DESCRIPTION("M66592 USB gadget driver");
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Yoshihiro Shimoda");
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MODULE_ALIAS("platform:m66592_udc");
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#define DRIVER_VERSION "21 July 2009"
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static const char udc_name[] = "m66592_udc";
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static const char *m66592_ep_name[] = {
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"ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7"
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};
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static void disable_controller(struct m66592 *m66592);
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static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req);
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static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req);
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static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
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gfp_t gfp_flags);
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static void transfer_complete(struct m66592_ep *ep,
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struct m66592_request *req, int status);
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/*-------------------------------------------------------------------------*/
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static inline u16 get_usb_speed(struct m66592 *m66592)
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{
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return (m66592_read(m66592, M66592_DVSTCTR) & M66592_RHST);
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}
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static void enable_pipe_irq(struct m66592 *m66592, u16 pipenum,
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unsigned long reg)
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{
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u16 tmp;
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tmp = m66592_read(m66592, M66592_INTENB0);
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m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
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M66592_INTENB0);
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m66592_bset(m66592, (1 << pipenum), reg);
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m66592_write(m66592, tmp, M66592_INTENB0);
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}
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static void disable_pipe_irq(struct m66592 *m66592, u16 pipenum,
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unsigned long reg)
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{
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u16 tmp;
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tmp = m66592_read(m66592, M66592_INTENB0);
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m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
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M66592_INTENB0);
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m66592_bclr(m66592, (1 << pipenum), reg);
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m66592_write(m66592, tmp, M66592_INTENB0);
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}
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static void m66592_usb_connect(struct m66592 *m66592)
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{
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m66592_bset(m66592, M66592_CTRE, M66592_INTENB0);
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m66592_bset(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
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M66592_INTENB0);
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m66592_bset(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
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m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
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}
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static void m66592_usb_disconnect(struct m66592 *m66592)
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__releases(m66592->lock)
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__acquires(m66592->lock)
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{
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m66592_bclr(m66592, M66592_CTRE, M66592_INTENB0);
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m66592_bclr(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
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M66592_INTENB0);
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m66592_bclr(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
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m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
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m66592->gadget.speed = USB_SPEED_UNKNOWN;
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spin_unlock(&m66592->lock);
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m66592->driver->disconnect(&m66592->gadget);
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spin_lock(&m66592->lock);
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disable_controller(m66592);
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INIT_LIST_HEAD(&m66592->ep[0].queue);
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}
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static inline u16 control_reg_get_pid(struct m66592 *m66592, u16 pipenum)
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{
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u16 pid = 0;
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unsigned long offset;
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if (pipenum == 0)
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pid = m66592_read(m66592, M66592_DCPCTR) & M66592_PID;
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else if (pipenum < M66592_MAX_NUM_PIPE) {
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offset = get_pipectr_addr(pipenum);
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pid = m66592_read(m66592, offset) & M66592_PID;
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} else
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pr_err("unexpect pipe num (%d)\n", pipenum);
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return pid;
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}
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static inline void control_reg_set_pid(struct m66592 *m66592, u16 pipenum,
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u16 pid)
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{
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unsigned long offset;
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if (pipenum == 0)
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m66592_mdfy(m66592, pid, M66592_PID, M66592_DCPCTR);
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else if (pipenum < M66592_MAX_NUM_PIPE) {
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offset = get_pipectr_addr(pipenum);
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m66592_mdfy(m66592, pid, M66592_PID, offset);
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} else
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pr_err("unexpect pipe num (%d)\n", pipenum);
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}
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static inline void pipe_start(struct m66592 *m66592, u16 pipenum)
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{
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control_reg_set_pid(m66592, pipenum, M66592_PID_BUF);
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}
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static inline void pipe_stop(struct m66592 *m66592, u16 pipenum)
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{
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control_reg_set_pid(m66592, pipenum, M66592_PID_NAK);
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}
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static inline void pipe_stall(struct m66592 *m66592, u16 pipenum)
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{
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control_reg_set_pid(m66592, pipenum, M66592_PID_STALL);
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}
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static inline u16 control_reg_get(struct m66592 *m66592, u16 pipenum)
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{
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u16 ret = 0;
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unsigned long offset;
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if (pipenum == 0)
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ret = m66592_read(m66592, M66592_DCPCTR);
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else if (pipenum < M66592_MAX_NUM_PIPE) {
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offset = get_pipectr_addr(pipenum);
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ret = m66592_read(m66592, offset);
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} else
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pr_err("unexpect pipe num (%d)\n", pipenum);
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return ret;
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}
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static inline void control_reg_sqclr(struct m66592 *m66592, u16 pipenum)
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{
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unsigned long offset;
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pipe_stop(m66592, pipenum);
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if (pipenum == 0)
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m66592_bset(m66592, M66592_SQCLR, M66592_DCPCTR);
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else if (pipenum < M66592_MAX_NUM_PIPE) {
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offset = get_pipectr_addr(pipenum);
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m66592_bset(m66592, M66592_SQCLR, offset);
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} else
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pr_err("unexpect pipe num(%d)\n", pipenum);
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}
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static inline int get_buffer_size(struct m66592 *m66592, u16 pipenum)
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{
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u16 tmp;
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int size;
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if (pipenum == 0) {
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tmp = m66592_read(m66592, M66592_DCPCFG);
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if ((tmp & M66592_CNTMD) != 0)
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size = 256;
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else {
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tmp = m66592_read(m66592, M66592_DCPMAXP);
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size = tmp & M66592_MAXP;
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}
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} else {
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m66592_write(m66592, pipenum, M66592_PIPESEL);
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tmp = m66592_read(m66592, M66592_PIPECFG);
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if ((tmp & M66592_CNTMD) != 0) {
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tmp = m66592_read(m66592, M66592_PIPEBUF);
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size = ((tmp >> 10) + 1) * 64;
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} else {
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tmp = m66592_read(m66592, M66592_PIPEMAXP);
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size = tmp & M66592_MXPS;
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}
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}
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return size;
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}
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static inline void pipe_change(struct m66592 *m66592, u16 pipenum)
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{
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struct m66592_ep *ep = m66592->pipenum2ep[pipenum];
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unsigned short mbw;
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if (ep->use_dma)
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return;
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m66592_mdfy(m66592, pipenum, M66592_CURPIPE, ep->fifosel);
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ndelay(450);
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if (m66592->pdata->on_chip)
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mbw = M66592_MBW_32;
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else
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mbw = M66592_MBW_16;
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m66592_bset(m66592, mbw, ep->fifosel);
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}
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static int pipe_buffer_setting(struct m66592 *m66592,
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struct m66592_pipe_info *info)
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{
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u16 bufnum = 0, buf_bsize = 0;
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u16 pipecfg = 0;
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if (info->pipe == 0)
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return -EINVAL;
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m66592_write(m66592, info->pipe, M66592_PIPESEL);
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if (info->dir_in)
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pipecfg |= M66592_DIR;
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pipecfg |= info->type;
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pipecfg |= info->epnum;
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switch (info->type) {
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case M66592_INT:
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bufnum = 4 + (info->pipe - M66592_BASE_PIPENUM_INT);
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buf_bsize = 0;
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break;
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case M66592_BULK:
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/* isochronous pipes may be used as bulk pipes */
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if (info->pipe >= M66592_BASE_PIPENUM_BULK)
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bufnum = info->pipe - M66592_BASE_PIPENUM_BULK;
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else
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bufnum = info->pipe - M66592_BASE_PIPENUM_ISOC;
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bufnum = M66592_BASE_BUFNUM + (bufnum * 16);
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buf_bsize = 7;
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pipecfg |= M66592_DBLB;
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if (!info->dir_in)
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pipecfg |= M66592_SHTNAK;
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break;
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case M66592_ISO:
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bufnum = M66592_BASE_BUFNUM +
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(info->pipe - M66592_BASE_PIPENUM_ISOC) * 16;
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buf_bsize = 7;
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break;
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}
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if (buf_bsize && ((bufnum + 16) >= M66592_MAX_BUFNUM)) {
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pr_err("m66592 pipe memory is insufficient\n");
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return -ENOMEM;
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}
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m66592_write(m66592, pipecfg, M66592_PIPECFG);
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m66592_write(m66592, (buf_bsize << 10) | (bufnum), M66592_PIPEBUF);
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m66592_write(m66592, info->maxpacket, M66592_PIPEMAXP);
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if (info->interval)
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info->interval--;
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m66592_write(m66592, info->interval, M66592_PIPEPERI);
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return 0;
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}
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static void pipe_buffer_release(struct m66592 *m66592,
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struct m66592_pipe_info *info)
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{
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if (info->pipe == 0)
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return;
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if (is_bulk_pipe(info->pipe)) {
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m66592->bulk--;
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} else if (is_interrupt_pipe(info->pipe))
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m66592->interrupt--;
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else if (is_isoc_pipe(info->pipe)) {
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m66592->isochronous--;
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if (info->type == M66592_BULK)
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m66592->bulk--;
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} else
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pr_err("ep_release: unexpect pipenum (%d)\n",
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info->pipe);
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}
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static void pipe_initialize(struct m66592_ep *ep)
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{
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struct m66592 *m66592 = ep->m66592;
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unsigned short mbw;
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m66592_mdfy(m66592, 0, M66592_CURPIPE, ep->fifosel);
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m66592_write(m66592, M66592_ACLRM, ep->pipectr);
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m66592_write(m66592, 0, ep->pipectr);
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m66592_write(m66592, M66592_SQCLR, ep->pipectr);
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if (ep->use_dma) {
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m66592_mdfy(m66592, ep->pipenum, M66592_CURPIPE, ep->fifosel);
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ndelay(450);
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if (m66592->pdata->on_chip)
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mbw = M66592_MBW_32;
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else
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mbw = M66592_MBW_16;
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m66592_bset(m66592, mbw, ep->fifosel);
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}
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}
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static void m66592_ep_setting(struct m66592 *m66592, struct m66592_ep *ep,
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const struct usb_endpoint_descriptor *desc,
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u16 pipenum, int dma)
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{
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if ((pipenum != 0) && dma) {
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if (m66592->num_dma == 0) {
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m66592->num_dma++;
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ep->use_dma = 1;
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ep->fifoaddr = M66592_D0FIFO;
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ep->fifosel = M66592_D0FIFOSEL;
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ep->fifoctr = M66592_D0FIFOCTR;
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ep->fifotrn = M66592_D0FIFOTRN;
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} else if (!m66592->pdata->on_chip && m66592->num_dma == 1) {
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m66592->num_dma++;
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ep->use_dma = 1;
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ep->fifoaddr = M66592_D1FIFO;
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ep->fifosel = M66592_D1FIFOSEL;
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ep->fifoctr = M66592_D1FIFOCTR;
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ep->fifotrn = M66592_D1FIFOTRN;
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} else {
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ep->use_dma = 0;
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ep->fifoaddr = M66592_CFIFO;
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ep->fifosel = M66592_CFIFOSEL;
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ep->fifoctr = M66592_CFIFOCTR;
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ep->fifotrn = 0;
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}
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} else {
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ep->use_dma = 0;
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ep->fifoaddr = M66592_CFIFO;
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ep->fifosel = M66592_CFIFOSEL;
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ep->fifoctr = M66592_CFIFOCTR;
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ep->fifotrn = 0;
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}
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ep->pipectr = get_pipectr_addr(pipenum);
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ep->pipenum = pipenum;
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ep->ep.maxpacket = usb_endpoint_maxp(desc);
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m66592->pipenum2ep[pipenum] = ep;
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m66592->epaddr2ep[desc->bEndpointAddress&USB_ENDPOINT_NUMBER_MASK] = ep;
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INIT_LIST_HEAD(&ep->queue);
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}
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static void m66592_ep_release(struct m66592_ep *ep)
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{
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struct m66592 *m66592 = ep->m66592;
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u16 pipenum = ep->pipenum;
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if (pipenum == 0)
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return;
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if (ep->use_dma)
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m66592->num_dma--;
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ep->pipenum = 0;
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ep->busy = 0;
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ep->use_dma = 0;
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}
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static int alloc_pipe_config(struct m66592_ep *ep,
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const struct usb_endpoint_descriptor *desc)
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{
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struct m66592 *m66592 = ep->m66592;
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struct m66592_pipe_info info;
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int dma = 0;
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int *counter;
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int ret;
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ep->ep.desc = desc;
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BUG_ON(ep->pipenum);
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switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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case USB_ENDPOINT_XFER_BULK:
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if (m66592->bulk >= M66592_MAX_NUM_BULK) {
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if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
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pr_err("bulk pipe is insufficient\n");
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return -ENODEV;
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} else {
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info.pipe = M66592_BASE_PIPENUM_ISOC
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+ m66592->isochronous;
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counter = &m66592->isochronous;
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}
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} else {
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info.pipe = M66592_BASE_PIPENUM_BULK + m66592->bulk;
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counter = &m66592->bulk;
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}
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info.type = M66592_BULK;
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dma = 1;
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break;
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case USB_ENDPOINT_XFER_INT:
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if (m66592->interrupt >= M66592_MAX_NUM_INT) {
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pr_err("interrupt pipe is insufficient\n");
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return -ENODEV;
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}
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info.pipe = M66592_BASE_PIPENUM_INT + m66592->interrupt;
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info.type = M66592_INT;
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counter = &m66592->interrupt;
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break;
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case USB_ENDPOINT_XFER_ISOC:
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if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
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pr_err("isochronous pipe is insufficient\n");
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return -ENODEV;
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}
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info.pipe = M66592_BASE_PIPENUM_ISOC + m66592->isochronous;
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info.type = M66592_ISO;
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counter = &m66592->isochronous;
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break;
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default:
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pr_err("unexpect xfer type\n");
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return -EINVAL;
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}
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ep->type = info.type;
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info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
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info.maxpacket = usb_endpoint_maxp(desc);
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info.interval = desc->bInterval;
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if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
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info.dir_in = 1;
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else
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info.dir_in = 0;
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ret = pipe_buffer_setting(m66592, &info);
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if (ret < 0) {
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pr_err("pipe_buffer_setting fail\n");
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return ret;
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}
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(*counter)++;
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if ((counter == &m66592->isochronous) && info.type == M66592_BULK)
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m66592->bulk++;
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m66592_ep_setting(m66592, ep, desc, info.pipe, dma);
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pipe_initialize(ep);
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return 0;
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}
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static int free_pipe_config(struct m66592_ep *ep)
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{
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struct m66592 *m66592 = ep->m66592;
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struct m66592_pipe_info info;
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info.pipe = ep->pipenum;
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info.type = ep->type;
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pipe_buffer_release(m66592, &info);
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m66592_ep_release(ep);
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return 0;
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}
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/*-------------------------------------------------------------------------*/
|
|
static void pipe_irq_enable(struct m66592 *m66592, u16 pipenum)
|
|
{
|
|
enable_irq_ready(m66592, pipenum);
|
|
enable_irq_nrdy(m66592, pipenum);
|
|
}
|
|
|
|
static void pipe_irq_disable(struct m66592 *m66592, u16 pipenum)
|
|
{
|
|
disable_irq_ready(m66592, pipenum);
|
|
disable_irq_nrdy(m66592, pipenum);
|
|
}
|
|
|
|
/* if complete is true, gadget driver complete function is not call */
|
|
static void control_end(struct m66592 *m66592, unsigned ccpl)
|
|
{
|
|
m66592->ep[0].internal_ccpl = ccpl;
|
|
pipe_start(m66592, 0);
|
|
m66592_bset(m66592, M66592_CCPL, M66592_DCPCTR);
|
|
}
|
|
|
|
static void start_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
|
|
{
|
|
struct m66592 *m66592 = ep->m66592;
|
|
|
|
pipe_change(m66592, ep->pipenum);
|
|
m66592_mdfy(m66592, M66592_ISEL | M66592_PIPE0,
|
|
(M66592_ISEL | M66592_CURPIPE),
|
|
M66592_CFIFOSEL);
|
|
m66592_write(m66592, M66592_BCLR, ep->fifoctr);
|
|
if (req->req.length == 0) {
|
|
m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
|
|
pipe_start(m66592, 0);
|
|
transfer_complete(ep, req, 0);
|
|
} else {
|
|
m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
|
|
irq_ep0_write(ep, req);
|
|
}
|
|
}
|
|
|
|
static void start_packet_write(struct m66592_ep *ep, struct m66592_request *req)
|
|
{
|
|
struct m66592 *m66592 = ep->m66592;
|
|
u16 tmp;
|
|
|
|
pipe_change(m66592, ep->pipenum);
|
|
disable_irq_empty(m66592, ep->pipenum);
|
|
pipe_start(m66592, ep->pipenum);
|
|
|
|
tmp = m66592_read(m66592, ep->fifoctr);
|
|
if (unlikely((tmp & M66592_FRDY) == 0))
|
|
pipe_irq_enable(m66592, ep->pipenum);
|
|
else
|
|
irq_packet_write(ep, req);
|
|
}
|
|
|
|
static void start_packet_read(struct m66592_ep *ep, struct m66592_request *req)
|
|
{
|
|
struct m66592 *m66592 = ep->m66592;
|
|
u16 pipenum = ep->pipenum;
|
|
|
|
if (ep->pipenum == 0) {
|
|
m66592_mdfy(m66592, M66592_PIPE0,
|
|
(M66592_ISEL | M66592_CURPIPE),
|
|
M66592_CFIFOSEL);
|
|
m66592_write(m66592, M66592_BCLR, ep->fifoctr);
|
|
pipe_start(m66592, pipenum);
|
|
pipe_irq_enable(m66592, pipenum);
|
|
} else {
|
|
if (ep->use_dma) {
|
|
m66592_bset(m66592, M66592_TRCLR, ep->fifosel);
|
|
pipe_change(m66592, pipenum);
|
|
m66592_bset(m66592, M66592_TRENB, ep->fifosel);
|
|
m66592_write(m66592,
|
|
(req->req.length + ep->ep.maxpacket - 1)
|
|
/ ep->ep.maxpacket,
|
|
ep->fifotrn);
|
|
}
|
|
pipe_start(m66592, pipenum); /* trigger once */
|
|
pipe_irq_enable(m66592, pipenum);
|
|
}
|
|
}
|
|
|
|
static void start_packet(struct m66592_ep *ep, struct m66592_request *req)
|
|
{
|
|
if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
|
|
start_packet_write(ep, req);
|
|
else
|
|
start_packet_read(ep, req);
|
|
}
|
|
|
|
static void start_ep0(struct m66592_ep *ep, struct m66592_request *req)
|
|
{
|
|
u16 ctsq;
|
|
|
|
ctsq = m66592_read(ep->m66592, M66592_INTSTS0) & M66592_CTSQ;
|
|
|
|
switch (ctsq) {
|
|
case M66592_CS_RDDS:
|
|
start_ep0_write(ep, req);
|
|
break;
|
|
case M66592_CS_WRDS:
|
|
start_packet_read(ep, req);
|
|
break;
|
|
|
|
case M66592_CS_WRND:
|
|
control_end(ep->m66592, 0);
|
|
break;
|
|
default:
|
|
pr_err("start_ep0: unexpect ctsq(%x)\n", ctsq);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void init_controller(struct m66592 *m66592)
|
|
{
|
|
unsigned int endian;
|
|
|
|
if (m66592->pdata->on_chip) {
|
|
if (m66592->pdata->endian)
|
|
endian = 0; /* big endian */
|
|
else
|
|
endian = M66592_LITTLE; /* little endian */
|
|
|
|
m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
|
|
m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
|
|
m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
|
|
m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
|
|
|
|
/* This is a workaound for SH7722 2nd cut */
|
|
m66592_bset(m66592, 0x8000, M66592_DVSTCTR);
|
|
m66592_bset(m66592, 0x1000, M66592_TESTMODE);
|
|
m66592_bclr(m66592, 0x8000, M66592_DVSTCTR);
|
|
|
|
m66592_bset(m66592, M66592_INTL, M66592_INTENB1);
|
|
|
|
m66592_write(m66592, 0, M66592_CFBCFG);
|
|
m66592_write(m66592, 0, M66592_D0FBCFG);
|
|
m66592_bset(m66592, endian, M66592_CFBCFG);
|
|
m66592_bset(m66592, endian, M66592_D0FBCFG);
|
|
} else {
|
|
unsigned int clock, vif, irq_sense;
|
|
|
|
if (m66592->pdata->endian)
|
|
endian = M66592_BIGEND; /* big endian */
|
|
else
|
|
endian = 0; /* little endian */
|
|
|
|
if (m66592->pdata->vif)
|
|
vif = M66592_LDRV; /* 3.3v */
|
|
else
|
|
vif = 0; /* 1.5v */
|
|
|
|
switch (m66592->pdata->xtal) {
|
|
case M66592_PLATDATA_XTAL_12MHZ:
|
|
clock = M66592_XTAL12;
|
|
break;
|
|
case M66592_PLATDATA_XTAL_24MHZ:
|
|
clock = M66592_XTAL24;
|
|
break;
|
|
case M66592_PLATDATA_XTAL_48MHZ:
|
|
clock = M66592_XTAL48;
|
|
break;
|
|
default:
|
|
pr_warn("m66592-udc: xtal configuration error\n");
|
|
clock = 0;
|
|
}
|
|
|
|
switch (m66592->irq_trigger) {
|
|
case IRQF_TRIGGER_LOW:
|
|
irq_sense = M66592_INTL;
|
|
break;
|
|
case IRQF_TRIGGER_FALLING:
|
|
irq_sense = 0;
|
|
break;
|
|
default:
|
|
pr_warn("m66592-udc: irq trigger config error\n");
|
|
irq_sense = 0;
|
|
}
|
|
|
|
m66592_bset(m66592,
|
|
(vif & M66592_LDRV) | (endian & M66592_BIGEND),
|
|
M66592_PINCFG);
|
|
m66592_bset(m66592, M66592_HSE, M66592_SYSCFG); /* High spd */
|
|
m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL,
|
|
M66592_SYSCFG);
|
|
m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
|
|
m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
|
|
m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);
|
|
|
|
m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
|
|
|
|
msleep(3);
|
|
|
|
m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
|
|
|
|
msleep(1);
|
|
|
|
m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
|
|
|
|
m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1);
|
|
m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR,
|
|
M66592_DMA0CFG);
|
|
}
|
|
}
|
|
|
|
static void disable_controller(struct m66592 *m66592)
|
|
{
|
|
m66592_bclr(m66592, M66592_UTST, M66592_TESTMODE);
|
|
if (!m66592->pdata->on_chip) {
|
|
m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG);
|
|
udelay(1);
|
|
m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG);
|
|
udelay(1);
|
|
m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG);
|
|
udelay(1);
|
|
m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG);
|
|
}
|
|
}
|
|
|
|
static void m66592_start_xclock(struct m66592 *m66592)
|
|
{
|
|
u16 tmp;
|
|
|
|
if (!m66592->pdata->on_chip) {
|
|
tmp = m66592_read(m66592, M66592_SYSCFG);
|
|
if (!(tmp & M66592_XCKE))
|
|
m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
|
|
}
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
static void transfer_complete(struct m66592_ep *ep,
|
|
struct m66592_request *req, int status)
|
|
__releases(m66592->lock)
|
|
__acquires(m66592->lock)
|
|
{
|
|
int restart = 0;
|
|
|
|
if (unlikely(ep->pipenum == 0)) {
|
|
if (ep->internal_ccpl) {
|
|
ep->internal_ccpl = 0;
|
|
return;
|
|
}
|
|
}
|
|
|
|
list_del_init(&req->queue);
|
|
if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
|
|
req->req.status = -ESHUTDOWN;
|
|
else
|
|
req->req.status = status;
|
|
|
|
if (!list_empty(&ep->queue))
|
|
restart = 1;
|
|
|
|
spin_unlock(&ep->m66592->lock);
|
|
usb_gadget_giveback_request(&ep->ep, &req->req);
|
|
spin_lock(&ep->m66592->lock);
|
|
|
|
if (restart) {
|
|
req = list_entry(ep->queue.next, struct m66592_request, queue);
|
|
if (ep->ep.desc)
|
|
start_packet(ep, req);
|
|
}
|
|
}
|
|
|
|
static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
|
|
{
|
|
int i;
|
|
u16 tmp;
|
|
unsigned bufsize;
|
|
size_t size;
|
|
void *buf;
|
|
u16 pipenum = ep->pipenum;
|
|
struct m66592 *m66592 = ep->m66592;
|
|
|
|
pipe_change(m66592, pipenum);
|
|
m66592_bset(m66592, M66592_ISEL, ep->fifosel);
|
|
|
|
i = 0;
|
|
do {
|
|
tmp = m66592_read(m66592, ep->fifoctr);
|
|
if (i++ > 100000) {
|
|
pr_err("pipe0 is busy. maybe cpu i/o bus "
|
|
"conflict. please power off this controller.");
|
|
return;
|
|
}
|
|
ndelay(1);
|
|
} while ((tmp & M66592_FRDY) == 0);
|
|
|
|
/* prepare parameters */
|
|
bufsize = get_buffer_size(m66592, pipenum);
|
|
buf = req->req.buf + req->req.actual;
|
|
size = min(bufsize, req->req.length - req->req.actual);
|
|
|
|
/* write fifo */
|
|
if (req->req.buf) {
|
|
if (size > 0)
|
|
m66592_write_fifo(m66592, ep, buf, size);
|
|
if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
|
|
m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
|
|
}
|
|
|
|
/* update parameters */
|
|
req->req.actual += size;
|
|
|
|
/* check transfer finish */
|
|
if ((!req->req.zero && (req->req.actual == req->req.length))
|
|
|| (size % ep->ep.maxpacket)
|
|
|| (size == 0)) {
|
|
disable_irq_ready(m66592, pipenum);
|
|
disable_irq_empty(m66592, pipenum);
|
|
} else {
|
|
disable_irq_ready(m66592, pipenum);
|
|
enable_irq_empty(m66592, pipenum);
|
|
}
|
|
pipe_start(m66592, pipenum);
|
|
}
|
|
|
|
static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req)
|
|
{
|
|
u16 tmp;
|
|
unsigned bufsize;
|
|
size_t size;
|
|
void *buf;
|
|
u16 pipenum = ep->pipenum;
|
|
struct m66592 *m66592 = ep->m66592;
|
|
|
|
pipe_change(m66592, pipenum);
|
|
tmp = m66592_read(m66592, ep->fifoctr);
|
|
if (unlikely((tmp & M66592_FRDY) == 0)) {
|
|
pipe_stop(m66592, pipenum);
|
|
pipe_irq_disable(m66592, pipenum);
|
|
pr_err("write fifo not ready. pipnum=%d\n", pipenum);
|
|
return;
|
|
}
|
|
|
|
/* prepare parameters */
|
|
bufsize = get_buffer_size(m66592, pipenum);
|
|
buf = req->req.buf + req->req.actual;
|
|
size = min(bufsize, req->req.length - req->req.actual);
|
|
|
|
/* write fifo */
|
|
if (req->req.buf) {
|
|
m66592_write_fifo(m66592, ep, buf, size);
|
|
if ((size == 0)
|
|
|| ((size % ep->ep.maxpacket) != 0)
|
|
|| ((bufsize != ep->ep.maxpacket)
|
|
&& (bufsize > size)))
|
|
m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
|
|
}
|
|
|
|
/* update parameters */
|
|
req->req.actual += size;
|
|
/* check transfer finish */
|
|
if ((!req->req.zero && (req->req.actual == req->req.length))
|
|
|| (size % ep->ep.maxpacket)
|
|
|| (size == 0)) {
|
|
disable_irq_ready(m66592, pipenum);
|
|
enable_irq_empty(m66592, pipenum);
|
|
} else {
|
|
disable_irq_empty(m66592, pipenum);
|
|
pipe_irq_enable(m66592, pipenum);
|
|
}
|
|
}
|
|
|
|
static void irq_packet_read(struct m66592_ep *ep, struct m66592_request *req)
|
|
{
|
|
u16 tmp;
|
|
int rcv_len, bufsize, req_len;
|
|
int size;
|
|
void *buf;
|
|
u16 pipenum = ep->pipenum;
|
|
struct m66592 *m66592 = ep->m66592;
|
|
int finish = 0;
|
|
|
|
pipe_change(m66592, pipenum);
|
|
tmp = m66592_read(m66592, ep->fifoctr);
|
|
if (unlikely((tmp & M66592_FRDY) == 0)) {
|
|
req->req.status = -EPIPE;
|
|
pipe_stop(m66592, pipenum);
|
|
pipe_irq_disable(m66592, pipenum);
|
|
pr_err("read fifo not ready");
|
|
return;
|
|
}
|
|
|
|
/* prepare parameters */
|
|
rcv_len = tmp & M66592_DTLN;
|
|
bufsize = get_buffer_size(m66592, pipenum);
|
|
|
|
buf = req->req.buf + req->req.actual;
|
|
req_len = req->req.length - req->req.actual;
|
|
if (rcv_len < bufsize)
|
|
size = min(rcv_len, req_len);
|
|
else
|
|
size = min(bufsize, req_len);
|
|
|
|
/* update parameters */
|
|
req->req.actual += size;
|
|
|
|
/* check transfer finish */
|
|
if ((!req->req.zero && (req->req.actual == req->req.length))
|
|
|| (size % ep->ep.maxpacket)
|
|
|| (size == 0)) {
|
|
pipe_stop(m66592, pipenum);
|
|
pipe_irq_disable(m66592, pipenum);
|
|
finish = 1;
|
|
}
|
|
|
|
/* read fifo */
|
|
if (req->req.buf) {
|
|
if (size == 0)
|
|
m66592_write(m66592, M66592_BCLR, ep->fifoctr);
|
|
else
|
|
m66592_read_fifo(m66592, ep->fifoaddr, buf, size);
|
|
}
|
|
|
|
if ((ep->pipenum != 0) && finish)
|
|
transfer_complete(ep, req, 0);
|
|
}
|
|
|
|
static void irq_pipe_ready(struct m66592 *m66592, u16 status, u16 enb)
|
|
{
|
|
u16 check;
|
|
u16 pipenum;
|
|
struct m66592_ep *ep;
|
|
struct m66592_request *req;
|
|
|
|
if ((status & M66592_BRDY0) && (enb & M66592_BRDY0)) {
|
|
m66592_write(m66592, ~M66592_BRDY0, M66592_BRDYSTS);
|
|
m66592_mdfy(m66592, M66592_PIPE0, M66592_CURPIPE,
|
|
M66592_CFIFOSEL);
|
|
|
|
ep = &m66592->ep[0];
|
|
req = list_entry(ep->queue.next, struct m66592_request, queue);
|
|
irq_packet_read(ep, req);
|
|
} else {
|
|
for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
|
|
check = 1 << pipenum;
|
|
if ((status & check) && (enb & check)) {
|
|
m66592_write(m66592, ~check, M66592_BRDYSTS);
|
|
ep = m66592->pipenum2ep[pipenum];
|
|
req = list_entry(ep->queue.next,
|
|
struct m66592_request, queue);
|
|
if (ep->ep.desc->bEndpointAddress & USB_DIR_IN)
|
|
irq_packet_write(ep, req);
|
|
else
|
|
irq_packet_read(ep, req);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void irq_pipe_empty(struct m66592 *m66592, u16 status, u16 enb)
|
|
{
|
|
u16 tmp;
|
|
u16 check;
|
|
u16 pipenum;
|
|
struct m66592_ep *ep;
|
|
struct m66592_request *req;
|
|
|
|
if ((status & M66592_BEMP0) && (enb & M66592_BEMP0)) {
|
|
m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
|
|
|
|
ep = &m66592->ep[0];
|
|
req = list_entry(ep->queue.next, struct m66592_request, queue);
|
|
irq_ep0_write(ep, req);
|
|
} else {
|
|
for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
|
|
check = 1 << pipenum;
|
|
if ((status & check) && (enb & check)) {
|
|
m66592_write(m66592, ~check, M66592_BEMPSTS);
|
|
tmp = control_reg_get(m66592, pipenum);
|
|
if ((tmp & M66592_INBUFM) == 0) {
|
|
disable_irq_empty(m66592, pipenum);
|
|
pipe_irq_disable(m66592, pipenum);
|
|
pipe_stop(m66592, pipenum);
|
|
ep = m66592->pipenum2ep[pipenum];
|
|
req = list_entry(ep->queue.next,
|
|
struct m66592_request,
|
|
queue);
|
|
if (!list_empty(&ep->queue))
|
|
transfer_complete(ep, req, 0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void get_status(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
|
|
__releases(m66592->lock)
|
|
__acquires(m66592->lock)
|
|
{
|
|
struct m66592_ep *ep;
|
|
u16 pid;
|
|
u16 status = 0;
|
|
u16 w_index = le16_to_cpu(ctrl->wIndex);
|
|
|
|
switch (ctrl->bRequestType & USB_RECIP_MASK) {
|
|
case USB_RECIP_DEVICE:
|
|
status = 1 << USB_DEVICE_SELF_POWERED;
|
|
break;
|
|
case USB_RECIP_INTERFACE:
|
|
status = 0;
|
|
break;
|
|
case USB_RECIP_ENDPOINT:
|
|
ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
|
|
pid = control_reg_get_pid(m66592, ep->pipenum);
|
|
if (pid == M66592_PID_STALL)
|
|
status = 1 << USB_ENDPOINT_HALT;
|
|
else
|
|
status = 0;
|
|
break;
|
|
default:
|
|
pipe_stall(m66592, 0);
|
|
return; /* exit */
|
|
}
|
|
|
|
m66592->ep0_data = cpu_to_le16(status);
|
|
m66592->ep0_req->buf = &m66592->ep0_data;
|
|
m66592->ep0_req->length = 2;
|
|
/* AV: what happens if we get called again before that gets through? */
|
|
spin_unlock(&m66592->lock);
|
|
m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL);
|
|
spin_lock(&m66592->lock);
|
|
}
|
|
|
|
static void clear_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
|
|
{
|
|
switch (ctrl->bRequestType & USB_RECIP_MASK) {
|
|
case USB_RECIP_DEVICE:
|
|
control_end(m66592, 1);
|
|
break;
|
|
case USB_RECIP_INTERFACE:
|
|
control_end(m66592, 1);
|
|
break;
|
|
case USB_RECIP_ENDPOINT: {
|
|
struct m66592_ep *ep;
|
|
struct m66592_request *req;
|
|
u16 w_index = le16_to_cpu(ctrl->wIndex);
|
|
|
|
ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
|
|
pipe_stop(m66592, ep->pipenum);
|
|
control_reg_sqclr(m66592, ep->pipenum);
|
|
|
|
control_end(m66592, 1);
|
|
|
|
req = list_entry(ep->queue.next,
|
|
struct m66592_request, queue);
|
|
if (ep->busy) {
|
|
ep->busy = 0;
|
|
if (list_empty(&ep->queue))
|
|
break;
|
|
start_packet(ep, req);
|
|
} else if (!list_empty(&ep->queue))
|
|
pipe_start(m66592, ep->pipenum);
|
|
}
|
|
break;
|
|
default:
|
|
pipe_stall(m66592, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void set_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
|
|
{
|
|
u16 tmp;
|
|
int timeout = 3000;
|
|
|
|
switch (ctrl->bRequestType & USB_RECIP_MASK) {
|
|
case USB_RECIP_DEVICE:
|
|
switch (le16_to_cpu(ctrl->wValue)) {
|
|
case USB_DEVICE_TEST_MODE:
|
|
control_end(m66592, 1);
|
|
/* Wait for the completion of status stage */
|
|
do {
|
|
tmp = m66592_read(m66592, M66592_INTSTS0) &
|
|
M66592_CTSQ;
|
|
udelay(1);
|
|
} while (tmp != M66592_CS_IDST && timeout-- > 0);
|
|
|
|
if (tmp == M66592_CS_IDST)
|
|
m66592_bset(m66592,
|
|
le16_to_cpu(ctrl->wIndex >> 8),
|
|
M66592_TESTMODE);
|
|
break;
|
|
default:
|
|
pipe_stall(m66592, 0);
|
|
break;
|
|
}
|
|
break;
|
|
case USB_RECIP_INTERFACE:
|
|
control_end(m66592, 1);
|
|
break;
|
|
case USB_RECIP_ENDPOINT: {
|
|
struct m66592_ep *ep;
|
|
u16 w_index = le16_to_cpu(ctrl->wIndex);
|
|
|
|
ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
|
|
pipe_stall(m66592, ep->pipenum);
|
|
|
|
control_end(m66592, 1);
|
|
}
|
|
break;
|
|
default:
|
|
pipe_stall(m66592, 0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* if return value is true, call class driver's setup() */
|
|
static int setup_packet(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
|
|
{
|
|
u16 *p = (u16 *)ctrl;
|
|
unsigned long offset = M66592_USBREQ;
|
|
int i, ret = 0;
|
|
|
|
/* read fifo */
|
|
m66592_write(m66592, ~M66592_VALID, M66592_INTSTS0);
|
|
|
|
for (i = 0; i < 4; i++)
|
|
p[i] = m66592_read(m66592, offset + i*2);
|
|
|
|
/* check request */
|
|
if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
|
|
switch (ctrl->bRequest) {
|
|
case USB_REQ_GET_STATUS:
|
|
get_status(m66592, ctrl);
|
|
break;
|
|
case USB_REQ_CLEAR_FEATURE:
|
|
clear_feature(m66592, ctrl);
|
|
break;
|
|
case USB_REQ_SET_FEATURE:
|
|
set_feature(m66592, ctrl);
|
|
break;
|
|
default:
|
|
ret = 1;
|
|
break;
|
|
}
|
|
} else
|
|
ret = 1;
|
|
return ret;
|
|
}
|
|
|
|
static void m66592_update_usb_speed(struct m66592 *m66592)
|
|
{
|
|
u16 speed = get_usb_speed(m66592);
|
|
|
|
switch (speed) {
|
|
case M66592_HSMODE:
|
|
m66592->gadget.speed = USB_SPEED_HIGH;
|
|
break;
|
|
case M66592_FSMODE:
|
|
m66592->gadget.speed = USB_SPEED_FULL;
|
|
break;
|
|
default:
|
|
m66592->gadget.speed = USB_SPEED_UNKNOWN;
|
|
pr_err("USB speed unknown\n");
|
|
}
|
|
}
|
|
|
|
static void irq_device_state(struct m66592 *m66592)
|
|
{
|
|
u16 dvsq;
|
|
|
|
dvsq = m66592_read(m66592, M66592_INTSTS0) & M66592_DVSQ;
|
|
m66592_write(m66592, ~M66592_DVST, M66592_INTSTS0);
|
|
|
|
if (dvsq == M66592_DS_DFLT) { /* bus reset */
|
|
usb_gadget_udc_reset(&m66592->gadget, m66592->driver);
|
|
m66592_update_usb_speed(m66592);
|
|
}
|
|
if (m66592->old_dvsq == M66592_DS_CNFG && dvsq != M66592_DS_CNFG)
|
|
m66592_update_usb_speed(m66592);
|
|
if ((dvsq == M66592_DS_CNFG || dvsq == M66592_DS_ADDS)
|
|
&& m66592->gadget.speed == USB_SPEED_UNKNOWN)
|
|
m66592_update_usb_speed(m66592);
|
|
|
|
m66592->old_dvsq = dvsq;
|
|
}
|
|
|
|
static void irq_control_stage(struct m66592 *m66592)
|
|
__releases(m66592->lock)
|
|
__acquires(m66592->lock)
|
|
{
|
|
struct usb_ctrlrequest ctrl;
|
|
u16 ctsq;
|
|
|
|
ctsq = m66592_read(m66592, M66592_INTSTS0) & M66592_CTSQ;
|
|
m66592_write(m66592, ~M66592_CTRT, M66592_INTSTS0);
|
|
|
|
switch (ctsq) {
|
|
case M66592_CS_IDST: {
|
|
struct m66592_ep *ep;
|
|
struct m66592_request *req;
|
|
ep = &m66592->ep[0];
|
|
req = list_entry(ep->queue.next, struct m66592_request, queue);
|
|
transfer_complete(ep, req, 0);
|
|
}
|
|
break;
|
|
|
|
case M66592_CS_RDDS:
|
|
case M66592_CS_WRDS:
|
|
case M66592_CS_WRND:
|
|
if (setup_packet(m66592, &ctrl)) {
|
|
spin_unlock(&m66592->lock);
|
|
if (m66592->driver->setup(&m66592->gadget, &ctrl) < 0)
|
|
pipe_stall(m66592, 0);
|
|
spin_lock(&m66592->lock);
|
|
}
|
|
break;
|
|
case M66592_CS_RDSS:
|
|
case M66592_CS_WRSS:
|
|
control_end(m66592, 0);
|
|
break;
|
|
default:
|
|
pr_err("ctrl_stage: unexpect ctsq(%x)\n", ctsq);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static irqreturn_t m66592_irq(int irq, void *_m66592)
|
|
{
|
|
struct m66592 *m66592 = _m66592;
|
|
u16 intsts0;
|
|
u16 intenb0;
|
|
u16 savepipe;
|
|
u16 mask0;
|
|
|
|
spin_lock(&m66592->lock);
|
|
|
|
intsts0 = m66592_read(m66592, M66592_INTSTS0);
|
|
intenb0 = m66592_read(m66592, M66592_INTENB0);
|
|
|
|
if (m66592->pdata->on_chip && !intsts0 && !intenb0) {
|
|
/*
|
|
* When USB clock stops, it cannot read register. Even if a
|
|
* clock stops, the interrupt occurs. So this driver turn on
|
|
* a clock by this timing and do re-reading of register.
|
|
*/
|
|
m66592_start_xclock(m66592);
|
|
intsts0 = m66592_read(m66592, M66592_INTSTS0);
|
|
intenb0 = m66592_read(m66592, M66592_INTENB0);
|
|
}
|
|
|
|
savepipe = m66592_read(m66592, M66592_CFIFOSEL);
|
|
|
|
mask0 = intsts0 & intenb0;
|
|
if (mask0) {
|
|
u16 brdysts = m66592_read(m66592, M66592_BRDYSTS);
|
|
u16 bempsts = m66592_read(m66592, M66592_BEMPSTS);
|
|
u16 brdyenb = m66592_read(m66592, M66592_BRDYENB);
|
|
u16 bempenb = m66592_read(m66592, M66592_BEMPENB);
|
|
|
|
if (mask0 & M66592_VBINT) {
|
|
m66592_write(m66592, 0xffff & ~M66592_VBINT,
|
|
M66592_INTSTS0);
|
|
m66592_start_xclock(m66592);
|
|
|
|
/* start vbus sampling */
|
|
m66592->old_vbus = m66592_read(m66592, M66592_INTSTS0)
|
|
& M66592_VBSTS;
|
|
m66592->scount = M66592_MAX_SAMPLING;
|
|
|
|
mod_timer(&m66592->timer,
|
|
jiffies + msecs_to_jiffies(50));
|
|
}
|
|
if (intsts0 & M66592_DVSQ)
|
|
irq_device_state(m66592);
|
|
|
|
if ((intsts0 & M66592_BRDY) && (intenb0 & M66592_BRDYE)
|
|
&& (brdysts & brdyenb)) {
|
|
irq_pipe_ready(m66592, brdysts, brdyenb);
|
|
}
|
|
if ((intsts0 & M66592_BEMP) && (intenb0 & M66592_BEMPE)
|
|
&& (bempsts & bempenb)) {
|
|
irq_pipe_empty(m66592, bempsts, bempenb);
|
|
}
|
|
|
|
if (intsts0 & M66592_CTRT)
|
|
irq_control_stage(m66592);
|
|
}
|
|
|
|
m66592_write(m66592, savepipe, M66592_CFIFOSEL);
|
|
|
|
spin_unlock(&m66592->lock);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void m66592_timer(struct timer_list *t)
|
|
{
|
|
struct m66592 *m66592 = from_timer(m66592, t, timer);
|
|
unsigned long flags;
|
|
u16 tmp;
|
|
|
|
spin_lock_irqsave(&m66592->lock, flags);
|
|
tmp = m66592_read(m66592, M66592_SYSCFG);
|
|
if (!(tmp & M66592_RCKE)) {
|
|
m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
|
|
udelay(10);
|
|
m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
|
|
}
|
|
if (m66592->scount > 0) {
|
|
tmp = m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS;
|
|
if (tmp == m66592->old_vbus) {
|
|
m66592->scount--;
|
|
if (m66592->scount == 0) {
|
|
if (tmp == M66592_VBSTS)
|
|
m66592_usb_connect(m66592);
|
|
else
|
|
m66592_usb_disconnect(m66592);
|
|
} else {
|
|
mod_timer(&m66592->timer,
|
|
jiffies + msecs_to_jiffies(50));
|
|
}
|
|
} else {
|
|
m66592->scount = M66592_MAX_SAMPLING;
|
|
m66592->old_vbus = tmp;
|
|
mod_timer(&m66592->timer,
|
|
jiffies + msecs_to_jiffies(50));
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&m66592->lock, flags);
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
static int m66592_enable(struct usb_ep *_ep,
|
|
const struct usb_endpoint_descriptor *desc)
|
|
{
|
|
struct m66592_ep *ep;
|
|
|
|
ep = container_of(_ep, struct m66592_ep, ep);
|
|
return alloc_pipe_config(ep, desc);
|
|
}
|
|
|
|
static int m66592_disable(struct usb_ep *_ep)
|
|
{
|
|
struct m66592_ep *ep;
|
|
struct m66592_request *req;
|
|
unsigned long flags;
|
|
|
|
ep = container_of(_ep, struct m66592_ep, ep);
|
|
BUG_ON(!ep);
|
|
|
|
while (!list_empty(&ep->queue)) {
|
|
req = list_entry(ep->queue.next, struct m66592_request, queue);
|
|
spin_lock_irqsave(&ep->m66592->lock, flags);
|
|
transfer_complete(ep, req, -ECONNRESET);
|
|
spin_unlock_irqrestore(&ep->m66592->lock, flags);
|
|
}
|
|
|
|
pipe_irq_disable(ep->m66592, ep->pipenum);
|
|
return free_pipe_config(ep);
|
|
}
|
|
|
|
static struct usb_request *m66592_alloc_request(struct usb_ep *_ep,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct m66592_request *req;
|
|
|
|
req = kzalloc(sizeof(struct m66592_request), gfp_flags);
|
|
if (!req)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&req->queue);
|
|
|
|
return &req->req;
|
|
}
|
|
|
|
static void m66592_free_request(struct usb_ep *_ep, struct usb_request *_req)
|
|
{
|
|
struct m66592_request *req;
|
|
|
|
req = container_of(_req, struct m66592_request, req);
|
|
kfree(req);
|
|
}
|
|
|
|
static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
|
|
gfp_t gfp_flags)
|
|
{
|
|
struct m66592_ep *ep;
|
|
struct m66592_request *req;
|
|
unsigned long flags;
|
|
int request = 0;
|
|
|
|
ep = container_of(_ep, struct m66592_ep, ep);
|
|
req = container_of(_req, struct m66592_request, req);
|
|
|
|
if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
|
|
return -ESHUTDOWN;
|
|
|
|
spin_lock_irqsave(&ep->m66592->lock, flags);
|
|
|
|
if (list_empty(&ep->queue))
|
|
request = 1;
|
|
|
|
list_add_tail(&req->queue, &ep->queue);
|
|
req->req.actual = 0;
|
|
req->req.status = -EINPROGRESS;
|
|
|
|
if (ep->ep.desc == NULL) /* control */
|
|
start_ep0(ep, req);
|
|
else {
|
|
if (request && !ep->busy)
|
|
start_packet(ep, req);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&ep->m66592->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int m66592_dequeue(struct usb_ep *_ep, struct usb_request *_req)
|
|
{
|
|
struct m66592_ep *ep;
|
|
struct m66592_request *req;
|
|
unsigned long flags;
|
|
|
|
ep = container_of(_ep, struct m66592_ep, ep);
|
|
req = container_of(_req, struct m66592_request, req);
|
|
|
|
spin_lock_irqsave(&ep->m66592->lock, flags);
|
|
if (!list_empty(&ep->queue))
|
|
transfer_complete(ep, req, -ECONNRESET);
|
|
spin_unlock_irqrestore(&ep->m66592->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int m66592_set_halt(struct usb_ep *_ep, int value)
|
|
{
|
|
struct m66592_ep *ep = container_of(_ep, struct m66592_ep, ep);
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
spin_lock_irqsave(&ep->m66592->lock, flags);
|
|
if (!list_empty(&ep->queue)) {
|
|
ret = -EAGAIN;
|
|
} else if (value) {
|
|
ep->busy = 1;
|
|
pipe_stall(ep->m66592, ep->pipenum);
|
|
} else {
|
|
ep->busy = 0;
|
|
pipe_stop(ep->m66592, ep->pipenum);
|
|
}
|
|
spin_unlock_irqrestore(&ep->m66592->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static void m66592_fifo_flush(struct usb_ep *_ep)
|
|
{
|
|
struct m66592_ep *ep;
|
|
unsigned long flags;
|
|
|
|
ep = container_of(_ep, struct m66592_ep, ep);
|
|
spin_lock_irqsave(&ep->m66592->lock, flags);
|
|
if (list_empty(&ep->queue) && !ep->busy) {
|
|
pipe_stop(ep->m66592, ep->pipenum);
|
|
m66592_bclr(ep->m66592, M66592_BCLR, ep->fifoctr);
|
|
}
|
|
spin_unlock_irqrestore(&ep->m66592->lock, flags);
|
|
}
|
|
|
|
static const struct usb_ep_ops m66592_ep_ops = {
|
|
.enable = m66592_enable,
|
|
.disable = m66592_disable,
|
|
|
|
.alloc_request = m66592_alloc_request,
|
|
.free_request = m66592_free_request,
|
|
|
|
.queue = m66592_queue,
|
|
.dequeue = m66592_dequeue,
|
|
|
|
.set_halt = m66592_set_halt,
|
|
.fifo_flush = m66592_fifo_flush,
|
|
};
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
static int m66592_udc_start(struct usb_gadget *g,
|
|
struct usb_gadget_driver *driver)
|
|
{
|
|
struct m66592 *m66592 = to_m66592(g);
|
|
|
|
/* hook up the driver */
|
|
driver->driver.bus = NULL;
|
|
m66592->driver = driver;
|
|
|
|
m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
|
|
if (m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS) {
|
|
m66592_start_xclock(m66592);
|
|
/* start vbus sampling */
|
|
m66592->old_vbus = m66592_read(m66592,
|
|
M66592_INTSTS0) & M66592_VBSTS;
|
|
m66592->scount = M66592_MAX_SAMPLING;
|
|
mod_timer(&m66592->timer, jiffies + msecs_to_jiffies(50));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int m66592_udc_stop(struct usb_gadget *g)
|
|
{
|
|
struct m66592 *m66592 = to_m66592(g);
|
|
|
|
m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
|
|
|
|
init_controller(m66592);
|
|
disable_controller(m66592);
|
|
|
|
m66592->driver = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
static int m66592_get_frame(struct usb_gadget *_gadget)
|
|
{
|
|
struct m66592 *m66592 = gadget_to_m66592(_gadget);
|
|
return m66592_read(m66592, M66592_FRMNUM) & 0x03FF;
|
|
}
|
|
|
|
static int m66592_pullup(struct usb_gadget *gadget, int is_on)
|
|
{
|
|
struct m66592 *m66592 = gadget_to_m66592(gadget);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&m66592->lock, flags);
|
|
if (is_on)
|
|
m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
|
|
else
|
|
m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
|
|
spin_unlock_irqrestore(&m66592->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct usb_gadget_ops m66592_gadget_ops = {
|
|
.get_frame = m66592_get_frame,
|
|
.udc_start = m66592_udc_start,
|
|
.udc_stop = m66592_udc_stop,
|
|
.pullup = m66592_pullup,
|
|
};
|
|
|
|
static int m66592_remove(struct platform_device *pdev)
|
|
{
|
|
struct m66592 *m66592 = platform_get_drvdata(pdev);
|
|
|
|
usb_del_gadget_udc(&m66592->gadget);
|
|
|
|
del_timer_sync(&m66592->timer);
|
|
iounmap(m66592->reg);
|
|
free_irq(platform_get_irq(pdev, 0), m66592);
|
|
m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
|
|
if (m66592->pdata->on_chip) {
|
|
clk_disable(m66592->clk);
|
|
clk_put(m66592->clk);
|
|
}
|
|
kfree(m66592);
|
|
return 0;
|
|
}
|
|
|
|
static void nop_completion(struct usb_ep *ep, struct usb_request *r)
|
|
{
|
|
}
|
|
|
|
static int m66592_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res, *ires;
|
|
void __iomem *reg = NULL;
|
|
struct m66592 *m66592 = NULL;
|
|
char clk_name[8];
|
|
int ret = 0;
|
|
int i;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res) {
|
|
ret = -ENODEV;
|
|
pr_err("platform_get_resource error.\n");
|
|
goto clean_up;
|
|
}
|
|
|
|
ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (!ires) {
|
|
ret = -ENODEV;
|
|
dev_err(&pdev->dev,
|
|
"platform_get_resource IORESOURCE_IRQ error.\n");
|
|
goto clean_up;
|
|
}
|
|
|
|
reg = ioremap(res->start, resource_size(res));
|
|
if (reg == NULL) {
|
|
ret = -ENOMEM;
|
|
pr_err("ioremap error.\n");
|
|
goto clean_up;
|
|
}
|
|
|
|
if (dev_get_platdata(&pdev->dev) == NULL) {
|
|
dev_err(&pdev->dev, "no platform data\n");
|
|
ret = -ENODEV;
|
|
goto clean_up;
|
|
}
|
|
|
|
/* initialize ucd */
|
|
m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL);
|
|
if (m66592 == NULL) {
|
|
ret = -ENOMEM;
|
|
goto clean_up;
|
|
}
|
|
|
|
m66592->pdata = dev_get_platdata(&pdev->dev);
|
|
m66592->irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
|
|
|
|
spin_lock_init(&m66592->lock);
|
|
platform_set_drvdata(pdev, m66592);
|
|
|
|
m66592->gadget.ops = &m66592_gadget_ops;
|
|
m66592->gadget.max_speed = USB_SPEED_HIGH;
|
|
m66592->gadget.name = udc_name;
|
|
|
|
timer_setup(&m66592->timer, m66592_timer, 0);
|
|
m66592->reg = reg;
|
|
|
|
ret = request_irq(ires->start, m66592_irq, IRQF_SHARED,
|
|
udc_name, m66592);
|
|
if (ret < 0) {
|
|
pr_err("request_irq error (%d)\n", ret);
|
|
goto clean_up;
|
|
}
|
|
|
|
if (m66592->pdata->on_chip) {
|
|
snprintf(clk_name, sizeof(clk_name), "usbf%d", pdev->id);
|
|
m66592->clk = clk_get(&pdev->dev, clk_name);
|
|
if (IS_ERR(m66592->clk)) {
|
|
dev_err(&pdev->dev, "cannot get clock \"%s\"\n",
|
|
clk_name);
|
|
ret = PTR_ERR(m66592->clk);
|
|
goto clean_up2;
|
|
}
|
|
clk_enable(m66592->clk);
|
|
}
|
|
|
|
INIT_LIST_HEAD(&m66592->gadget.ep_list);
|
|
m66592->gadget.ep0 = &m66592->ep[0].ep;
|
|
INIT_LIST_HEAD(&m66592->gadget.ep0->ep_list);
|
|
for (i = 0; i < M66592_MAX_NUM_PIPE; i++) {
|
|
struct m66592_ep *ep = &m66592->ep[i];
|
|
|
|
if (i != 0) {
|
|
INIT_LIST_HEAD(&m66592->ep[i].ep.ep_list);
|
|
list_add_tail(&m66592->ep[i].ep.ep_list,
|
|
&m66592->gadget.ep_list);
|
|
}
|
|
ep->m66592 = m66592;
|
|
INIT_LIST_HEAD(&ep->queue);
|
|
ep->ep.name = m66592_ep_name[i];
|
|
ep->ep.ops = &m66592_ep_ops;
|
|
usb_ep_set_maxpacket_limit(&ep->ep, 512);
|
|
|
|
if (i == 0) {
|
|
ep->ep.caps.type_control = true;
|
|
} else {
|
|
ep->ep.caps.type_iso = true;
|
|
ep->ep.caps.type_bulk = true;
|
|
ep->ep.caps.type_int = true;
|
|
}
|
|
|
|
ep->ep.caps.dir_in = true;
|
|
ep->ep.caps.dir_out = true;
|
|
}
|
|
usb_ep_set_maxpacket_limit(&m66592->ep[0].ep, 64);
|
|
m66592->ep[0].pipenum = 0;
|
|
m66592->ep[0].fifoaddr = M66592_CFIFO;
|
|
m66592->ep[0].fifosel = M66592_CFIFOSEL;
|
|
m66592->ep[0].fifoctr = M66592_CFIFOCTR;
|
|
m66592->ep[0].fifotrn = 0;
|
|
m66592->ep[0].pipectr = get_pipectr_addr(0);
|
|
m66592->pipenum2ep[0] = &m66592->ep[0];
|
|
m66592->epaddr2ep[0] = &m66592->ep[0];
|
|
|
|
m66592->ep0_req = m66592_alloc_request(&m66592->ep[0].ep, GFP_KERNEL);
|
|
if (m66592->ep0_req == NULL) {
|
|
ret = -ENOMEM;
|
|
goto clean_up3;
|
|
}
|
|
m66592->ep0_req->complete = nop_completion;
|
|
|
|
init_controller(m66592);
|
|
|
|
ret = usb_add_gadget_udc(&pdev->dev, &m66592->gadget);
|
|
if (ret)
|
|
goto err_add_udc;
|
|
|
|
dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
|
|
return 0;
|
|
|
|
err_add_udc:
|
|
m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
|
|
|
|
clean_up3:
|
|
if (m66592->pdata->on_chip) {
|
|
clk_disable(m66592->clk);
|
|
clk_put(m66592->clk);
|
|
}
|
|
clean_up2:
|
|
free_irq(ires->start, m66592);
|
|
clean_up:
|
|
if (m66592) {
|
|
if (m66592->ep0_req)
|
|
m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
|
|
kfree(m66592);
|
|
}
|
|
if (reg)
|
|
iounmap(reg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*-------------------------------------------------------------------------*/
|
|
static struct platform_driver m66592_driver = {
|
|
.remove = m66592_remove,
|
|
.driver = {
|
|
.name = (char *) udc_name,
|
|
},
|
|
};
|
|
|
|
module_platform_driver_probe(m66592_driver, m66592_probe);
|