174 lines
6.6 KiB
C
174 lines
6.6 KiB
C
|
/***************************************************************************
|
||
|
|
* __________ __ ___.
|
||
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
||
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
||
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
||
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
||
|
|
* \/ \/ \/ \/ \/
|
||
|
|
* $Id: $
|
||
|
|
*
|
||
|
|
* Copyright (C) 2007 by Christian Gmeiner
|
||
|
|
*
|
||
|
|
* Based on code from the Linux Target Image Builder from Freescale
|
||
|
|
* available at http://www.bitshrine.org/ and
|
||
|
|
* http://www.bitshrine.org/gpp/linux-2.6.16-mx31-usb-2.patch
|
||
|
|
* Adapted for Rockbox in January 2007
|
||
|
|
* Original file: drivers/usb/gadget/arcotg_udc.c
|
||
|
|
*
|
||
|
|
* USB Device Controller Driver
|
||
|
|
* Driver for ARC OTG USB module in the i.MX31 platform, etc.
|
||
|
|
*
|
||
|
|
* Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* Based on mpc-udc.h
|
||
|
|
* Author: Li Yang (leoli@freescale.com)
|
||
|
|
* Jiang Bo (Tanya.jiang@freescale.com)
|
||
|
|
*
|
||
|
|
* All files in this archive are subject to the GNU General Public License.
|
||
|
|
* See the file COPYING in the source tree root for full license agreement.
|
||
|
|
*
|
||
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
||
|
|
* KIND, either express or implied.
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#ifndef _ARCOTG_DCD_H_
|
||
|
|
#define _ARCOTG_DCD_H_
|
||
|
|
|
||
|
|
#include "usbstack/core.h"
|
||
|
|
#include "arcotg_udc.h"
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
#define ep_is_in(EP) (((EP)->desc->bEndpointAddress & USB_DIR_IN)==USB_DIR_IN)
|
||
|
|
|
||
|
|
#define EP_DIR_IN 1
|
||
|
|
#define EP_DIR_OUT 0
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/* pipe direction macro from device view */
|
||
|
|
#define USB_RECV (0) /* OUT EP */
|
||
|
|
#define USB_SEND (1) /* IN EP */
|
||
|
|
|
||
|
|
/* Shared Bit Masks for Endpoint Queue Head and Endpoint Transfer Descriptor */
|
||
|
|
#define TERMINATE (1 << 0)
|
||
|
|
#define STATUS_ACTIVE (1 << 7)
|
||
|
|
#define STATUS_HALTED (1 << 6)
|
||
|
|
#define STATUS_DATA_BUFF_ERR (1 << 5)
|
||
|
|
#define STATUS_TRANSACTION_ERR (1 << 4)
|
||
|
|
#define INTERRUPT_ON_COMPLETE (1 << 15)
|
||
|
|
#define LENGTH_BIT_POS (16)
|
||
|
|
#define ADDRESS_MASK (0xFFFFFFE0)
|
||
|
|
#define ERROR_MASK (DTD_STATUS_HALTED | \
|
||
|
|
DTD_STATUS_DATA_BUFF_ERR | \
|
||
|
|
DTD_STATUS_TRANSACTION_ERR)
|
||
|
|
|
||
|
|
#define RESERVED_FIELDS ((1 << 0) | (1 << 2) | (1 << 4) | \
|
||
|
|
(1 << 8) | (1 << 9) | (1 << 12)| \
|
||
|
|
(1 << 13)| (1 << 14)| (1 << 31))
|
||
|
|
|
||
|
|
/* Endpoint Queue Head Bit Masks */
|
||
|
|
#define EP_QUEUE_HEAD_MULT_POS (30)
|
||
|
|
#define EP_QUEUE_HEAD_ZLT_SEL (0x20000000)
|
||
|
|
#define EP_QUEUE_HEAD_MAX_PKT_LEN(ep_info) (((ep_info)>>16)&0x07ff)
|
||
|
|
#define EP_QUEUE_HEAD_MULTO (0x00000C00)
|
||
|
|
#define EP_QUEUE_CURRENT_OFFSET_MASK (0x00000FFF)
|
||
|
|
#define EP_QUEUE_FRINDEX_MASK (0x000007FF)
|
||
|
|
#define EP_MAX_LENGTH_TRANSFER (0x4000)
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/* ep name is important, it should obey the convention of ep_match() */
|
||
|
|
/* even numbered EPs are OUT or setup, odd are IN/INTERRUPT */
|
||
|
|
static const char* ep_name[] = {
|
||
|
|
"ep0-control", NULL, /* everyone has ep0 */
|
||
|
|
/* 7 configurable endpoints */
|
||
|
|
"ep1out",
|
||
|
|
"ep1in",
|
||
|
|
"ep2out",
|
||
|
|
"ep2in",
|
||
|
|
"ep3out",
|
||
|
|
"ep3in",
|
||
|
|
"ep4out",
|
||
|
|
"ep4in",
|
||
|
|
"ep5out",
|
||
|
|
"ep5in",
|
||
|
|
"ep6out",
|
||
|
|
"ep6in",
|
||
|
|
"ep7out",
|
||
|
|
"ep7in"
|
||
|
|
};
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/* Endpoint Transfer Descriptor data struct */
|
||
|
|
struct dtd {
|
||
|
|
uint32_t next_dtd; /* Next TD pointer(31-5), T(0) set indicate invalid */
|
||
|
|
uint32_t dtd_token; /* Total bytes (30-16), IOC (15), MultO(11-10), STS (7-0) */
|
||
|
|
uint32_t buf_ptr0; /* Buffer pointer Page 0 */
|
||
|
|
uint32_t buf_ptr1; /* Buffer pointer Page 1 */
|
||
|
|
uint32_t buf_ptr2; /* Buffer pointer Page 2 */
|
||
|
|
uint32_t buf_ptr3; /* Buffer pointer Page 3 */
|
||
|
|
uint32_t buf_ptr4; /* Buffer pointer Page 4 */
|
||
|
|
uint32_t res; /* make it an even 8 words */
|
||
|
|
} __attribute((packed));
|
||
|
|
|
||
|
|
/* Endpoint Queue Head*/
|
||
|
|
struct dqh {
|
||
|
|
uint32_t endpt_cap; /* Mult(31-30) , Zlt(29) , Max Pkt len
|
||
|
|
* and IOS(15) */
|
||
|
|
uint32_t cur_dtd; /* Current dTD Pointer(31-5) */
|
||
|
|
struct dtd dtd_ovrl; /* Transfer descriptor */
|
||
|
|
uint32_t setup_buffer[2]; /* Setup data 8 bytes */
|
||
|
|
uint32_t res2[4]; /* pad out to 64 bytes */
|
||
|
|
} __attribute((packed));
|
||
|
|
|
||
|
|
#define RESPONSE_SIZE 30
|
||
|
|
|
||
|
|
/* our controller struct */
|
||
|
|
struct arcotg_dcd {
|
||
|
|
struct usb_ctrlrequest local_setup_buff;
|
||
|
|
struct usb_ep endpoints[USB_MAX_PIPES];
|
||
|
|
struct usb_response response[RESPONSE_SIZE];
|
||
|
|
enum usb_device_state usb_state;
|
||
|
|
enum usb_device_state resume_state;
|
||
|
|
bool stopped;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------------------*/
|
||
|
|
|
||
|
|
/* usb_controller functions */
|
||
|
|
void usb_arcotg_dcd_init(void);
|
||
|
|
void usb_arcotg_dcd_shutdown(void);
|
||
|
|
void usb_arcotg_dcd_irq(void);
|
||
|
|
void usb_arcotg_dcd_start(void);
|
||
|
|
void usb_arcotg_dcd_stop(void);
|
||
|
|
|
||
|
|
/* usb controller ops */
|
||
|
|
int usb_arcotg_dcd_enable(struct usb_ep* ep);
|
||
|
|
int usb_arcotg_dcd_disable(struct usb_ep* ep);
|
||
|
|
int usb_arcotg_dcd_set_halt(struct usb_ep* ep, bool halt);
|
||
|
|
int usb_arcotg_dcd_send(struct usb_ep* ep, struct usb_response* request);
|
||
|
|
int usb_arcotg_dcd_receive(struct usb_ep* ep, struct usb_response* res);
|
||
|
|
|
||
|
|
/* interrupt handlers */
|
||
|
|
static void setup_received_int(struct usb_ctrlrequest* request);
|
||
|
|
static void port_change_int(void);
|
||
|
|
static void reset_int(void);
|
||
|
|
static void suspend_int(void);
|
||
|
|
static void resume_int(void);
|
||
|
|
|
||
|
|
/* life cycle */
|
||
|
|
static void qh_init(unsigned char ep_num, unsigned char dir, unsigned char ep_type,
|
||
|
|
unsigned int max_pkt_len, unsigned int zlt, unsigned char mult);
|
||
|
|
static void td_init(struct dtd* td, void* buffer, uint32_t todo);
|
||
|
|
static void ep_setup(unsigned char ep_num, unsigned char dir, unsigned char ep_type);
|
||
|
|
|
||
|
|
/* helpers for tx/rx */
|
||
|
|
static int td_enqueue(struct dtd* td, struct dqh* qh, unsigned int mask);
|
||
|
|
static int td_wait(struct dtd* td, unsigned int mask);
|
||
|
|
static int usb_ack(struct usb_ctrlrequest * s, int error);
|
||
|
|
|
||
|
|
#endif /*_ARCOTG_DCD_H_*/
|