948 lines
29 KiB
C
948 lines
29 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2009 by Karl Kurbjun
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* Portions Copyright (C) 2007 by Catalin Patulea
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/*#define LOGF_ENABLE*/
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#include "system.h"
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#include "config.h"
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#include "string.h"
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#include "usb_ch9.h"
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#include "usb_core.h"
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#include "kernel.h"
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#include "panic.h"
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#include "usb_drv.h"
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#include "logf.h"
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#include "cpu.h"
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#include "ata.h"
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#include "usb.h"
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#include "m66591.h"
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/*******************************************************************************
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* These are the driver specific defines.
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******************************************************************************/
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/* This define is primarily intended for testing, using HISPEED all the time
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* should be acceptable since the device should down-train if the host does not
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* support HISPEED.
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*/
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#define HISPEED
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/* Right now sending blocks till the full transfer has completed. The driver
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* will work without USB_TRAN_BLOCK set, but it is more than 50% slower.
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* The driver is more "Proper" without USB_TRAN_BLOCK defined so if you start
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* having freezeups or trouble using USB undefine this option.
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*/
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#define USB_TRAN_BLOCK
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/*******************************************************************************
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* The following functions are all helpers which should not be called directly
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* from the USB stack. They should only be called by eachother, or the USB
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* stack visible functions.
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******************************************************************************/
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static volatile unsigned short * pipe_ctrl_addr(int pipe);
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static void pipe_handshake(int pipe, int handshake);
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static void pipe_c_select (int pipe, bool dir);
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#if !defined(USB_TRAN_BLOCK)
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static int pipe_buffer_size (int pipe);
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#endif
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static int pipe_maxpack_size (int pipe);
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static void control_received(void);
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static void transfer_complete(int endpoint);
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static int mxx_transmit_receive(int endpoint);
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static int mxx_queue(int endpoint, void * ptr, int length, bool send,
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bool wait);
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struct M66591_epstat {
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unsigned char dir; /* endpoint direction */
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char *buf; /* user buffer to store data */
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int length; /* how match data will fit */
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volatile int count; /* actual data count */
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bool waiting; /* is there data to transfer? */
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bool busy; /* has the pipe been requested for use? */
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} ;
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static struct M66591_epstat M66591_eps[USB_NUM_ENDPOINTS];
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/* This function is used to return the control address for each pipe */
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static volatile unsigned short * pipe_ctrl_addr(int pipe) {
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if(pipe==0) {
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return &M66591_DCPCTRL;
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} else {
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return &M66591_PIPECTRL1 + (pipe-1);
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}
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}
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static void pipe_init(int pipe) {
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volatile unsigned short *pipe_cfg;
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pipe_cfg = pipe_ctrl_addr(pipe);
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*pipe_cfg |= 1<<9; /* ACLR */
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*pipe_cfg &= ~(1<<9); /* Force de-assertion */
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*pipe_cfg |= 1<<8; /* SQCLR */
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}
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/* This function sets the pipe/endpoint handshake */
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static void pipe_handshake(int pipe, int handshake) {
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handshake&=0x03;
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if(handshake == PIPE_SHAKE_STALL) {
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if( *(pipe_ctrl_addr(pipe)) & 0x03 ) {
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*(pipe_ctrl_addr(pipe)) = 0x03;
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} else {
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*(pipe_ctrl_addr(pipe)) = 0x02;
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}
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} else {
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*(pipe_ctrl_addr(pipe)) = handshake;
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}
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}
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/* This function chooses the pipe desired and waits the required time before
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* warites/reads are valid */
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static void pipe_c_select (int pipe, bool dir) {
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M66591_CPORT_CTRL0 = pipe | (1<<10) | (dir<<5);
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// Wait for the Pipe to be valid;
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udelay(2);
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}
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#if !defined(USB_TRAN_BLOCK)
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/* This returns the maximum buffer size of each pipe. On this device the size
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* is fixed.
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*/
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static int pipe_buffer_size (int pipe) {
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switch(pipe) {
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case 0:
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return 256;
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case 1:
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case 2:
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if(M66591_PIPE_CFGWND & (1<<9) )
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return 1024;
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else
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return 512;
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case 3:
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case 4:
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return 512;
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case 5:
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case 6:
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return 64;
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default:
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return 0;
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}
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}
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#endif
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/* This function returns the maximum packet size for each endpoint/pipe. The
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* max packet size is dependent on whether the device is running High or Full
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* speed.
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*/
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static int pipe_maxpack_size (int pipe) {
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if( (M66591_HSFS & 0xFF) == 0x03 ) { /* Device is running Highspeed */
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switch(pipe) {
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case 0:
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/* DCP max packet size is configurable */
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return M66591_DCP_MXPKSZ;
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case 1:
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case 2:
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case 3:
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case 4:
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return 512;
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case 5:
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case 6:
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return 64;
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default:
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return 0;
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}
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} else { /* Device is running Full speed */
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switch(pipe) {
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case 0:
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/* DCP max packet size is configurable */
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return M66591_DCP_MXPKSZ;
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case 1:
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case 2:
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case 3:
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case 4:
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return 64;
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case 5:
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case 6:
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return 64;
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default:
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return 0;
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}
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}
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}
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/* This is a helper function that is only called from the interupt handler. It
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* copies the control packet information from the PHY and notifies the stack.
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*/
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static void control_received(void) {
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/* copy setup data from packet */
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static struct usb_ctrlrequest temp;
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memcpy(&temp, (unsigned char*)&M66591_USB_REQ0, 8);
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logf("mxx: bReqType=0x%02x bReq=0x%02x wVal=0x%04x"
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" wIdx=0x%04x wLen=0x%04x",
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temp.bRequestType, temp.bRequest, temp.wValue,
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temp.wIndex, temp.wLength);
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/* acknowledge packet recieved (clear valid) */
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M66591_INTSTAT_MAIN &= ~(1<<3);
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usb_core_legacy_control_request(&temp);
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}
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/* This is a helper function, it is used to notife the stack that a transfer is
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* done.
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*/
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static void transfer_complete(int endpoint) {
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M66591_INTCFG_EMP &= ~(1 << endpoint);
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logf("mxx: ep %d transfer complete", endpoint);
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int temp=M66591_eps[endpoint].dir ? USB_DIR_IN : USB_DIR_OUT;
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usb_core_transfer_complete(endpoint, temp, 0,
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M66591_eps[endpoint].count);
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}
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/* This is the main transmit routine that is typically called from the interrupt
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* handler (the queue function calls it in some situations)
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*/
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static int mxx_transmit_receive(int endpoint) {
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logf("mxx: do start");
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/* Only the lower 15 bits of the endpoint correlate to the pipe number.
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* For example pipe 2 will corelate to endpoint 0x82, so the upper bits
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* need to be masked out.
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*/
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endpoint &= 0x7F;
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int i; /* Used as a loop counter */
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int length; /* Used in transfers to determine the amount to send/receive */
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bool send=M66591_eps[endpoint].dir;
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/* This is used as the internal buffer pointer */
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unsigned short *ptrs;
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/* Choose the pipe that data is being transfered on */
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pipe_c_select(endpoint, send);
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/* Check to see if the endpoint is ready and give it some time to become
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* ready. If it runs out of time exit out as an error.
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*/
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i = 0;
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while (!(M66591_CPORT_CTRL1&(1<<13))) {
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if (i++ > 100000) {
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logf("mxx: FIFO %d not ready", endpoint);
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return -1;
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}
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}
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/* Write to FIFO */
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if(send) {
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int maxpack=pipe_maxpack_size(endpoint);
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#if defined(USB_TRAN_BLOCK)
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length = M66591_eps[endpoint].length;
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#else
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int bufsize=pipe_buffer_size(endpoint);
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length=MIN(M66591_eps[endpoint].length - M66591_eps[endpoint].count,
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bufsize);
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#endif
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/* Calculate the position in the buffer, all transfers should be 2-byte
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* aligned till the last packet or short packet.
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*/
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ptrs = (unsigned short *)(M66591_eps[endpoint].buf
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+ M66591_eps[endpoint].count);
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/* Check if the buffer is alligned */
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if( LIKELY(((int)ptrs) & 0x01) == 0 )
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{
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/* Start sending data in 16-bit words (fast) */
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for (i = 0; i < (length>>1); i++) {
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#if defined(USB_TRAN_BLOCK)
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/* This wait is dangerous in the event that something happens
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* to the PHY pipe where it never becomes ready again, should
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* probably add a timeout, and ideally completely remove.
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*/
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while(!(M66591_CPORT_CTRL1&(1<<13))){};
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#endif
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M66591_CPORT = *ptrs++;
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M66591_eps[endpoint].count+=2;
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}
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/* If the length is odd, send the last byte after setting the byte
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* width of the FIFO.
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*/
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if(length & 0x01) {
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/* Unset MBW (8-bit transfer) */
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M66591_CPORT_CTRL0 &= ~(1<<10);
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M66591_CPORT = *((unsigned char *)ptrs);
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M66591_eps[endpoint].count++;
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}
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}
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else
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{
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/* The buffer is mis-aligned - data needs to be organized first.
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* This is slower than the above method.
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*/
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unsigned short sbuf;
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unsigned char *ptrc = (unsigned char*)ptrs;
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/* Start sending data in 16-bit words */
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for (i = 0; i < (length>>1); i++) {
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#if defined(USB_TRAN_BLOCK)
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/* This wait is dangerous in the event that something happens
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* to the PHY pipe where it never becomes ready again, should
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* probably add a timeout, and ideally completely remove.
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*/
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while(!(M66591_CPORT_CTRL1&(1<<13))){};
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#endif
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/* These are mis-aligned accesses so the data nees to be
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* arranged.
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*/
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sbuf = (*(ptrc+1) << 8) | *ptrc;
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ptrc += 2;
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M66591_CPORT = sbuf;
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M66591_eps[endpoint].count+=2;
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}
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/* If the length is odd, send the last byte after setting the byte
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* width of the FIFO.
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*/
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if(length & 0x01) {
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/* Unset MBW (8-bit transfer) */
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M66591_CPORT_CTRL0 &= ~(1<<10);
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M66591_CPORT = *ptrc;
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M66591_eps[endpoint].count++;
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}
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}
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/* If the transfer is complete set up interrupts to notify when FIFO is
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* EMPTY, disable READY and let the handler know that there is nothing
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* left to transfer on this pipe.
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*/
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if(M66591_eps[endpoint].count == M66591_eps[endpoint].length) {
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/* Enable Empty flag */
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M66591_INTCFG_EMP |= 1 << endpoint;
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/* Disable ready flag */
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M66591_INTCFG_RDY &= ~(1 << endpoint);
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/* Nothing left to transfer */
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M66591_eps[endpoint].waiting=false;
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} else {
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/* There is still data to transfer, make sure READY is enabled */
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M66591_INTCFG_RDY |= 1 << endpoint;
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}
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/* Set BVAL if length is not a multiple of the maximum packet size */
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if( (length == 0) || (length % maxpack != 0) ) {
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logf("mxx: do set BVAL");
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M66591_CPORT_CTRL1 |= (1<<15) | ((length == 0) << 14);
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}
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} else {
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/* Read data from FIFO */
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/* Read the number of bytes that the PHY received */
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int receive_length=M66591_CPORT_CTRL1 & 0x03FF;
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/* The number of bytes to actually read is either what's left of the
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* amount requested, or the amount that the PHY received. Choose the
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* smaller of the two.
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*/
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length = MIN(M66591_eps[endpoint].length - M66591_eps[endpoint].count,
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receive_length);
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/* If the length is zero, just clear the buffer as specified in the
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* datasheet. Otherwise read in the data (in 16-bit pieces */
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if(length==0) {
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/* Set the BCLR bit */
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M66591_CPORT_CTRL1 |= 1<<14;
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} else {
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/* Set the position in the buffer */
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ptrs = (unsigned short *)(M66591_eps[endpoint].buf
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+ M66591_eps[endpoint].count);
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/* Read in the data (buffer size should be even). The PHY cannot
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* switch from 16-bit mode to 8-bit mode on an OUT buffer.
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*/
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for (i = 0; i < ((length+1)>>1); i++) {
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*ptrs++ = M66591_CPORT;
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M66591_eps[endpoint].count+=2;
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}
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}
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/* If the length was odd subtract 1 from the count */
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M66591_eps[endpoint].count -= (length&0x01);
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/* If the requested size of data was received, or the data received was
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* less than the maximum packet size end the transfer.
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*/
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if( (M66591_eps[endpoint].count == M66591_eps[endpoint].length)
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|| (length % pipe_maxpack_size(endpoint)) ) {
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/* If the host tries to send anything else the FIFO is not ready/
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* enabled yet (NAK).
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*/
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pipe_handshake(endpoint, PIPE_SHAKE_NAK);
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/* Tell the interrupt handler that transfer is complete. */
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M66591_eps[endpoint].waiting=false;
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/* Disable ready */
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M66591_INTCFG_RDY &= ~(1 << endpoint);
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/* Let the stack know that the transfer is complete */
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if(endpoint!=0)
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transfer_complete(endpoint);
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}
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}
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logf("mxx: do done ep %d %s len: %d cnt: %d", endpoint,
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send ? "out" : "in", length, M66591_eps[endpoint].count);
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return 0;
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}
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/* This function is used to start transfers. It is a helper function for the
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* usb_drv_send_nonblocking, usb_drv_send, and usb_drv_receive functions.
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*
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* The functionality for wait needs to be added. Currently the driver is
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* always used in a blocking mode(USB_TRAN_BLOCK) so it is not required.
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*/
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static int mxx_queue(int endpoint, void * ptr, int length, bool send,
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bool wait)
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{
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#if defined(USB_TRAN_BLOCK) && !defined(LOGF_ENABLE)
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(void) wait;
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#endif
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/* Disable IRQs */
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int flags = disable_irq_save();
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/* Only the lower 15 bits of the endpoint correlate to the pipe number.
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* For example pipe 2 will corelate to endpoint 0x82, so the upper bits
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* need to be masked out.
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*/
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endpoint &= 0x7F;
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/* Initialize the enpoint status registers used for the transfer */
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M66591_eps[endpoint].buf=ptr;
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M66591_eps[endpoint].length=length;
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M66591_eps[endpoint].count=0;
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M66591_eps[endpoint].dir=send;
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M66591_eps[endpoint].waiting=true;
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logf("mxx: queue ep %d %s, len: %d, wait: %d",
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endpoint, send ? "out" : "in", length, wait);
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/* Pick the pipe that communications are happening on */
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pipe_c_select(endpoint, send);
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/* All transfers start with a BUF handshake */
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pipe_handshake(endpoint, PIPE_SHAKE_BUF);
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|
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/* This USB PHY takes care of control completion packets by setting the
|
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* CCPL bit in EP0 (endpoint 0, or DCP). If the control state is "write no
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* data tranfer" then we just need to set the CCPL bit (hopefully)
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* regardless of what the stack said to send.
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*/
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int control_state = (M66591_INTSTAT_MAIN & 0x07);
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if(endpoint==0 && control_state==CTRL_WTND) {
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logf("mxx: queue ep 0 ctls: 5, set ccpl");
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/* Set CCPL */
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M66591_DCPCTRL |= 1<<2;
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} else {
|
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/* This is the standard case for transmitting data */
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if(send) {
|
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/* If the pipe is not ready don't try and send right away; instead
|
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* just set the READY interrupt so that the handler can initiate
|
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* the transfer.
|
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*/
|
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if((M66591_CPORT_CTRL1&(1<<13))) {
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mxx_transmit_receive(endpoint);
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} else {
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M66591_INTCFG_RDY |= 1 << endpoint;
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}
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|
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if(length==0) {
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transfer_complete(endpoint);
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}
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} else {
|
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/* When receiving data, just enable the ready interrupt, the PHY
|
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* will trigger it and then the reads can start.
|
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*/
|
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M66591_INTCFG_RDY |= 1 << endpoint;
|
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}
|
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}
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|
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/* Re-enable IRQs */
|
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restore_irq(flags);
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return 0;
|
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}
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|
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/*******************************************************************************
|
|
* This is the interrupt handler for this driver. It should be called from the
|
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* target interrupt handler routine (eg. GPIO3 on M:Robe 500).
|
|
******************************************************************************/
|
|
void USB_DEVICE(void) __attribute__ ((section(".icode")));
|
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void USB_DEVICE(void) {
|
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int pipe_restore=M66591_CPORT_CTRL0;
|
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logf("\nmxx: INT BEGIN tick: %d", (int) current_tick);
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|
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logf("mxx: sMAIN0: 0x%04x, sRDY: 0x%04x",
|
|
M66591_INTSTAT_MAIN, M66591_INTSTAT_RDY);
|
|
logf("mxx: sNRDY: 0x%04x, sEMP: 0x%04x",
|
|
M66591_INTSTAT_NRDY, M66591_INTSTAT_EMP);
|
|
|
|
/* VBUS (connected) interrupt */
|
|
while ( M66591_INTSTAT_MAIN & (1<<15) ) {
|
|
M66591_INTSTAT_MAIN &= ~(1<<15);
|
|
|
|
/* If device is not clocked, interrupt flag must be set manually */
|
|
if ( !(M66591_TRN_CTRL & (1<<10)) ) {
|
|
M66591_INTSTAT_MAIN |= (1<<15);
|
|
}
|
|
}
|
|
|
|
/* Resume interrupt: This is not used. Extra logic needs to be added similar
|
|
* to the VBUS interrupt incase the PHY clock is not running.
|
|
*/
|
|
if(M66591_INTSTAT_MAIN & (1<<14)) {
|
|
M66591_INTSTAT_MAIN &= ~(1<<14);
|
|
logf("mxx: RESUME");
|
|
}
|
|
|
|
/* Device state transition interrupt: Not used, but useful for debugging */
|
|
if(M66591_INTSTAT_MAIN & (1<<12)) {
|
|
M66591_INTSTAT_MAIN &= ~(1<<12);
|
|
logf("mxx: DEV state CHANGE=%d",
|
|
((M66591_INTSTAT_MAIN & (0x07<<4)) >> 4) );
|
|
}
|
|
|
|
/* Control transfer stage interrupt */
|
|
if(M66591_INTSTAT_MAIN & (1<<11)) {
|
|
M66591_INTSTAT_MAIN &= ~(1<<11);
|
|
int control_state = (M66591_INTSTAT_MAIN & 0x07);
|
|
|
|
logf("mxx: CTRT with CTSQ=%d", control_state);
|
|
|
|
switch ( control_state ) {
|
|
case CTRL_IDLE:
|
|
transfer_complete(0);
|
|
break;
|
|
case CTRL_RTDS:
|
|
case CTRL_WTDS:
|
|
case CTRL_WTND:
|
|
/* If data is not valid stop */
|
|
if(!(M66591_INTSTAT_MAIN & (1<<3)) ) {
|
|
logf("mxx: CTRT interrupt but VALID is false");
|
|
break;
|
|
}
|
|
control_received();
|
|
break;
|
|
case CTRL_RTSS:
|
|
case CTRL_WTSS:
|
|
pipe_handshake(0, PIPE_SHAKE_BUF);
|
|
M66591_DCPCTRL |= 1<<2; /* Set CCPL */
|
|
break;
|
|
default:
|
|
logf("mxx: CTRT with unknown CTSQ");
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* FIFO EMPTY interrupt: when this happens the transfer should be complete.
|
|
* When the interrupt occurs notify the stack.
|
|
*/
|
|
if(M66591_INTSTAT_MAIN & (1<<10)) {
|
|
int i;
|
|
logf("mxx: INT EMPTY: 0x%04x", M66591_INTSTAT_EMP);
|
|
|
|
for(i=0; i<USB_NUM_ENDPOINTS; i++) {
|
|
if(M66591_INTSTAT_EMP&(1<<i)) {
|
|
/* Clear the empty flag */
|
|
M66591_INTSTAT_EMP=~(1<<i);
|
|
/* Notify the stack */
|
|
transfer_complete(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* FIFO NOT READY interrupt: This is not used, but included incase the
|
|
* interrupt is endabled.
|
|
*/
|
|
if(M66591_INTSTAT_MAIN & (1<<9)) {
|
|
logf("mxx: INT NOT READY: 0x%04x", M66591_INTSTAT_NRDY);
|
|
M66591_INTSTAT_NRDY = 0;
|
|
}
|
|
|
|
/* FIFO READY interrupt: This just initiates transfers if they are needed */
|
|
if(M66591_INTSTAT_MAIN & (1<<8)) {
|
|
int i;
|
|
logf("mxx: INT READY: 0x%04x", M66591_INTSTAT_RDY);
|
|
|
|
for(i=0; i<USB_NUM_ENDPOINTS; i++) {
|
|
/* Was this endpoint ready and waiting */
|
|
if(M66591_INTSTAT_RDY&(1<<i) && M66591_eps[i].waiting) {
|
|
/* Clear the ready flag */
|
|
M66591_INTSTAT_RDY=~(1<<i);
|
|
/* It was ready and waiting so start a transfer */
|
|
mxx_transmit_receive(i);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Make sure that the INTStatus register is completely cleared. */
|
|
M66591_INTSTAT_MAIN = 0;
|
|
|
|
/* Restore the pipe state before the interrupt occured */
|
|
M66591_CPORT_CTRL0=pipe_restore;
|
|
logf("mxx: INT END\n");
|
|
}
|
|
|
|
/*******************************************************************************
|
|
* The following functions are all called by and visible to the USB stack.
|
|
******************************************************************************/
|
|
|
|
/* The M55691 handles this automatically, nothing to do */
|
|
void usb_drv_set_address(int address) {
|
|
(void) address;
|
|
}
|
|
|
|
/* This function sets the standard test modes, it is not required, but might as
|
|
* well implement it since the hardware supports it
|
|
*/
|
|
void usb_drv_set_test_mode(int mode) {
|
|
/* This sets the test bits and assumes that mode is from 0 to 0x04 */
|
|
M66591_TESTMODE &= 0x0007;
|
|
M66591_TESTMODE |= mode;
|
|
}
|
|
|
|
/* Request an unused endpoint */
|
|
int usb_drv_request_endpoint(int type, int dir) {
|
|
int ep;
|
|
int pipecfg = 0;
|
|
|
|
if (type == USB_ENDPOINT_XFER_BULK) {
|
|
/* Enable double buffer mode (only used for ep 1 and 2) */
|
|
pipecfg |= 1<<9 | 1<<8;
|
|
|
|
/* Bulk endpoints must be between 1 and 4 inclusive */
|
|
ep=1;
|
|
|
|
while(M66591_eps[ep].busy && ep++<5);
|
|
|
|
/* If this reached 5 the endpoints were all busy */
|
|
if(ep==5) {
|
|
logf("mxx: ep %d busy", ep);
|
|
return -1;
|
|
}
|
|
} else if (type == USB_ENDPOINT_XFER_INT) {
|
|
ep=5;
|
|
|
|
pipecfg |= 1<<13;
|
|
|
|
while(M66591_eps[ep].busy && ++ep<USB_NUM_ENDPOINTS);
|
|
|
|
/* If this reached USB_NUM_ENDPOINTS the endpoints were all busy */
|
|
if(ep==USB_NUM_ENDPOINTS) {
|
|
logf("mxx: ep %d busy", ep);
|
|
return -1;
|
|
}
|
|
} else {
|
|
/* Not a supported type */
|
|
return -1;
|
|
}
|
|
|
|
if (dir == USB_DIR_IN) {
|
|
pipecfg |= (1<<4);
|
|
}
|
|
|
|
M66591_eps[ep].busy = true;
|
|
M66591_eps[ep].dir = dir;
|
|
|
|
M66591_PIPE_CFGSEL=ep;
|
|
|
|
/* Enable pipe (15) */
|
|
pipecfg |= 1<<15;
|
|
|
|
pipe_handshake(ep, PIPE_SHAKE_NAK);
|
|
|
|
/* Setup the flags */
|
|
M66591_PIPE_CFGWND=pipecfg;
|
|
|
|
pipe_init(ep);
|
|
|
|
logf("mxx: ep req ep#: %d config: 0x%04x", ep, M66591_PIPE_CFGWND);
|
|
|
|
return ep | dir;
|
|
}
|
|
|
|
/* Used by stack to tell the helper functions that the pipe is not in use */
|
|
void usb_drv_release_endpoint(int ep) {
|
|
int flags;
|
|
ep &= 0x7f;
|
|
|
|
if (ep < 1 || ep > USB_NUM_ENDPOINTS || M66591_eps[ep].busy == false)
|
|
return ;
|
|
|
|
flags = disable_irq_save();
|
|
|
|
logf("mxx: ep %d release", ep);
|
|
|
|
M66591_eps[ep].busy = false;
|
|
M66591_eps[ep].dir = -1;
|
|
|
|
restore_irq(flags);
|
|
}
|
|
|
|
/* Periodically called to check if a cable was plugged into the device */
|
|
inline int usb_detect(void)
|
|
{
|
|
if(M66591_INTSTAT_MAIN&(1<<7))
|
|
return USB_INSERTED;
|
|
else
|
|
return USB_EXTRACTED;
|
|
}
|
|
|
|
void usb_enable(bool on) {
|
|
logf("mxx: %s: %s", __FUNCTION__, on ? "true" : "false");
|
|
if (on)
|
|
usb_core_init();
|
|
else
|
|
usb_core_exit();
|
|
}
|
|
|
|
/* This is where the driver stuff starts */
|
|
void usb_drv_init(void) {
|
|
logf("mxx: Device Init");
|
|
|
|
M66591_PIN_CFG1 = 0x8000; /* Drive Current: 3.3V setting */
|
|
M66591_PIN_CFG2 = 0x0000;
|
|
|
|
M66591_TRN_CTRL = 0x8000; /* External 48 MHz clock */
|
|
M66591_TRN_CTRL |=0x0001;
|
|
|
|
M66591_INTCFG_MAIN |=0x8000; /* Enable VBUS interrupt */
|
|
}
|
|
|
|
/* fully enable driver */
|
|
void usb_attach(void) {
|
|
int i;
|
|
|
|
/* Reset Endpoint states */
|
|
for(i=0; i<USB_NUM_ENDPOINTS; i++) {
|
|
M66591_eps[i].dir = -1;
|
|
M66591_eps[i].buf = (char *) 0;
|
|
M66591_eps[i].length = 0;
|
|
M66591_eps[i].count = 0;
|
|
M66591_eps[i].waiting = false;
|
|
M66591_eps[i].busy = false;
|
|
}
|
|
|
|
/* Issue a h/w reset */
|
|
usb_init_device();
|
|
usb_core_init();
|
|
|
|
/* USB Attach Process: This follows the flow diagram in the M66591GP
|
|
* Reference Manual Rev 1.00, p. 77 */
|
|
|
|
#if defined(HISPEED)
|
|
/* Run Hi-Speed */
|
|
M66591_TRN_CTRL |= 1<<7;
|
|
#else
|
|
/* Run Full-Speed */
|
|
M66591_TRN_CTRL &= ~(1<<7);
|
|
#endif
|
|
|
|
/* Enable oscillation buffer XCKE */
|
|
M66591_TRN_CTRL |= (1<<13);
|
|
|
|
udelay(1500);
|
|
|
|
/* Enable reference clock, PLL RCKE */
|
|
M66591_TRN_CTRL |= (3<<11);
|
|
|
|
udelay(9);
|
|
|
|
/* Enable internal clock supply SCKE */
|
|
M66591_TRN_CTRL |= (1<<10);
|
|
|
|
/* Disable PIPE ready interrupts */
|
|
M66591_INTCFG_RDY = 0;
|
|
|
|
/* Disable PIPE not-ready interrupts */
|
|
M66591_INTCFG_NRDY = 0;
|
|
|
|
/* Disable PIPE empyt/size error interrupts */
|
|
M66591_INTCFG_EMP = 0;
|
|
|
|
/* Enable all interrupts except NOT READY, RESUME, and VBUS */
|
|
M66591_INTCFG_MAIN = 0x1DFF;
|
|
|
|
pipe_c_select(0, false);
|
|
|
|
/* Enable continuous transfer mode on the DCP */
|
|
M66591_DCP_CNTMD |= (1<<8);
|
|
|
|
/* Set the threshold that the PHY will automatically transmit from EP0 */
|
|
M66591_DCP_CTRLEN = 256;
|
|
|
|
pipe_handshake(0, PIPE_SHAKE_NAK);
|
|
|
|
/* Set the Max packet size to 64 */
|
|
M66591_DCP_MXPKSZ = 64;
|
|
|
|
/* Attach notification to PC (D+ pull-up) */
|
|
M66591_TRN_CTRL |= (1<<4);
|
|
|
|
logf("mxx: attached");
|
|
}
|
|
|
|
void usb_drv_exit(void) {
|
|
/* USB Detach Process: This follows the flow diagram in the M66591GP
|
|
* Reference Manual Rev 1.00, p. 78.
|
|
*/
|
|
|
|
/* Detach notification to PC (disable D+ pull-up) */
|
|
M66591_TRN_CTRL &= ~(1<<4);
|
|
|
|
/* Software reset */
|
|
M66591_TRN_CTRL &= ~0x01;
|
|
|
|
/* Disable internal clock supply */
|
|
M66591_TRN_CTRL &= ~(1<<10);
|
|
udelay(3);
|
|
|
|
/* Disable PLL */
|
|
M66591_TRN_CTRL &= ~(1<<11);
|
|
udelay(3);
|
|
|
|
/* Disable internal reference clock */
|
|
M66591_TRN_CTRL &= ~(1<<12);
|
|
udelay(3);
|
|
|
|
/* Disable oscillation buffer, reenable USB operation */
|
|
M66591_TRN_CTRL &= ~(1<<13);
|
|
|
|
M66591_TRN_CTRL |= 0x01;
|
|
|
|
logf("mxx: detached");
|
|
}
|
|
|
|
/* This function begins a transmit (on an IN endpoint), it should not block
|
|
* so the actual transmit is done in the interrupt handler.
|
|
*/
|
|
int usb_drv_send_nonblocking(int endpoint, void* ptr, int length)
|
|
{
|
|
return mxx_queue(endpoint, ptr, length, true, false);
|
|
}
|
|
|
|
/* This function begins a transmit (on an IN endpoint), it does not block
|
|
* so the actual transmit is done in the interrupt handler.
|
|
*/
|
|
int usb_drv_send(int endpoint, void* ptr, int length)
|
|
{
|
|
return mxx_queue(endpoint, ptr, length, true, true);
|
|
}
|
|
|
|
/* This function begins a receive (on an OUT endpoint), it should not block
|
|
* so the actual receive is done in the interrupt handler.
|
|
*/
|
|
int usb_drv_recv_nonblocking(int endpoint, void* ptr, int length)
|
|
{
|
|
return mxx_queue(endpoint, ptr, length, false, false);
|
|
}
|
|
|
|
/* This function checks the reset handshake speed status
|
|
* (Fullspeed or Highspeed)
|
|
*/
|
|
int usb_drv_port_speed(void)
|
|
{
|
|
int handshake = (M66591_HSFS & 0xFF);
|
|
|
|
if( handshake == 0x02) {
|
|
return 0; /* Handshook at Full-Speed */
|
|
} else if( handshake == 0x03) {
|
|
return 1; /* Handshook at Hi-Speed */
|
|
} else {
|
|
return -1; /* Error, handshake may not be complete */
|
|
}
|
|
}
|
|
|
|
/* This function checks if the endpoint is stalled (error). I am not sure what
|
|
* the "in" variable is intended for.
|
|
*/
|
|
bool usb_drv_stalled(int endpoint,bool in)
|
|
{
|
|
(void) in;
|
|
|
|
bool stalled = (*(pipe_ctrl_addr(endpoint)) & (0x02)) ? true : false;
|
|
|
|
logf("mxx: stall?: %s ep: %d", stalled ? "true" : "false", endpoint);
|
|
|
|
if(stalled) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* This function stalls/unstalls the endpoint. Stalls only happen on error so
|
|
* if the endpoint is functioning properly this should not be called. I am
|
|
* not sure what the "in" variable is intended for.
|
|
*/
|
|
void usb_drv_stall(int endpoint, bool stall,bool in)
|
|
{
|
|
(void) in;
|
|
|
|
logf("mxx: stall - ep: %d", endpoint);
|
|
|
|
if(stall) {
|
|
/* Stall the pipe (host needs to intervene/error) */
|
|
pipe_handshake(endpoint, PIPE_SHAKE_STALL);
|
|
} else {
|
|
/* Setting this to a NAK, not sure if it is appropriate */
|
|
pipe_handshake(endpoint, PIPE_SHAKE_NAK);
|
|
}
|
|
}
|
|
|
|
/* !!!!!!!!!!This function is likely incomplete!!!!!!!!!!!!!! */
|
|
void usb_drv_cancel_all_transfers(void)
|
|
{
|
|
int endpoint;
|
|
int flags;
|
|
|
|
logf("mxx: %s", __func__);
|
|
|
|
flags = disable_irq_save();
|
|
for (endpoint = 0; endpoint < USB_NUM_ENDPOINTS; endpoint++) {
|
|
if (M66591_eps[endpoint].buf) {
|
|
M66591_eps[endpoint].buf = NULL;
|
|
}
|
|
}
|
|
|
|
restore_irq(flags);
|
|
}
|
|
|