forked from len0rd/rockbox
0456ec5630
iap_reset_state() and iap_getc() are now passed the logical IAP port (0 is dock/only connector, 1 is headphone connector) Change-Id: I97421146a8cab032b90c9b4eb55b50aa00d73312
271 lines
7.4 KiB
C
271 lines
7.4 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) 2002 by Alan Korr & Nick Robinson
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include "button.h"
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#include "config.h"
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#include "cpu.h"
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#include "system.h"
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#include "kernel.h"
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#include "lcd.h"
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#include "serial.h"
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#include "iap.h"
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#if defined(IPOD_ACCESSORY_PROTOCOL)
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struct ppuart {
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volatile unsigned long *RBR_THR_DLL;
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volatile unsigned long *LCR;
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volatile unsigned long *LSR;
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int autobaud;
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};
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static struct ppuart SER0 = { &SER0_RBR, &SER0_LCR, &SER0_LSR, 0 };
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#if defined(IPOD_COLOR) || defined(IPOD_4G) || defined(IPOD_MINI) || defined(IPOD_MINI2G)
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static struct ppuart SER1 = { &SER1_RBR, &SER1_LCR, &SER1_LSR, 0 };
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static volatile struct ppuart *SERn = &SER1; // ie dock connector
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#else
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static volatile struct ppuart *SERn = &SER0;
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#endif
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static void set_bitrate(volatile struct ppuart *port, unsigned int rate)
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{
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unsigned int divisor;
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divisor = 24000000L / rate / 16;
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*port->LCR = 0x80; /* Divisor latch enable */
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*port->RBR_THR_DLL = (divisor >> 0) & 0xFF;
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*port->LCR = 0x03; /* Divisor latch disable, 8-N-1 */
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}
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void serial_setup (void)
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{
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int tmp;
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#if defined(IPOD_NANO) || defined(IPOD_VIDEO)
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/* Route the Tx/Rx pins. 5G Ipods. ser0, dock conncetor */
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(*(volatile unsigned long *)(0x7000008C)) &= ~0x0C;
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GPO32_ENABLE &= ~0x0C;
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DEV_EN = DEV_EN | DEV_SER0;
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CPU_HI_INT_DIS = SER0_MASK;
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DEV_RS |= DEV_SER0;
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sleep(1);
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DEV_RS &= ~DEV_SER0;
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SER0_LCR = 0x80; /* Divisor latch enable */
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SER0_DLM = 0x00;
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SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
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SER0_IER = 0x01;
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SER0_FCR = 0x07; /* Tx+Rx FIFO reset and FIFO enable */
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CPU_INT_EN = HI_MASK;
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CPU_HI_INT_EN = SER0_MASK;
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tmp = SER0_RBR;
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SER0.autobaud = 2;
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set_bitrate(&SER0, 115200);
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#elif defined(IPOD_COLOR) || defined(IPOD_4G) || defined(IPOD_MINI) || defined(IPOD_MINI2G)
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/* Route the Tx/Rx pins. 4G Ipods, MINI & MINI2G. ser1, dock connector */
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GPIO_CLEAR_BITWISE(GPIOD_ENABLE, 0x6);
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GPIO_CLEAR_BITWISE(GPIOD_OUTPUT_EN, 0x6);
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GPIOD_INT_CLR = 0x6;
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outl(0x70000018, inl(0x70000018) & ~0xc00);
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DEV_EN |= DEV_SER1;
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CPU_HI_INT_DIS = SER1_MASK;
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DEV_RS |= DEV_SER1;
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sleep(1);
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DEV_RS &= ~DEV_SER1;
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SER1_LCR = 0x80; /* Divisor latch enable */
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SER1_DLM = 0x00;
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SER1_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
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SER1_IER = 0x01;
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SER1_FCR = 0x07; /* Tx+Rx FIFO reset and FIFO enable */
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CPU_INT_EN = HI_MASK;
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CPU_HI_INT_EN = SER1_MASK;
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tmp = SER1_RBR;
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/* Route the Tx/Rx pins. 4G Ipod, ser0, top connector */
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GPIO_CLEAR_BITWISE(GPIOC_INT_EN, 0x8);
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GPIO_CLEAR_BITWISE(GPIOC_INT_LEV, 0x8);
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GPIOC_INT_CLR = 0x8;
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DEV_EN |= DEV_SER0;
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CPU_HI_INT_DIS = SER0_MASK;
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DEV_RS |= DEV_SER0;
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sleep(1);
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DEV_RS &= ~DEV_SER0;
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SER0_LCR = 0x80; /* Divisor latch enable */
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SER0_DLM = 0x00;
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SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */
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SER0_IER = 0x01;
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SER0_FCR = 0x07; /* Tx+Rx FIFO reset and FIFO enable */
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CPU_INT_EN = HI_MASK;
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CPU_HI_INT_EN = SER0_MASK;
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tmp = SER0_RBR;
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SER1.autobaud = 2;
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set_bitrate(&SER1, 115200);
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SER0.autobaud = 2;
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set_bitrate(&SER0, 115200);
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#endif
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(void)tmp;
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}
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void serial_bitrate(int rate)
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{
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if(rate == 0)
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{
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SER0.autobaud = 2;
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set_bitrate(&SER0, 115200);
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#if defined(IPOD_COLOR) || defined(IPOD_4G) || defined(IPOD_MINI) || defined(IPOD_MINI2G)
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SER1.autobaud = 2;
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set_bitrate(&SER1, 115200);
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#endif
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}
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else
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{
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SER0.autobaud = 0;
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set_bitrate(&SER0, rate);
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#if defined(IPOD_COLOR) || defined(IPOD_4G) || defined(IPOD_MINI) || defined(IPOD_MINI2G)
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SER1.autobaud = 0;
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set_bitrate(&SER1, rate);
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#endif
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}
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}
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int tx_rdy(void)
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{
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if((*SERn->LSR & 0x20))
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return 1;
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else
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return 0;
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}
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void tx_writec(unsigned char c)
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{
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*SERn->RBR_THR_DLL = (int)c;
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}
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void SERIAL_ISR(int port)
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{
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static int badbaud = 0;
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static bool newpkt = true;
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char temp;
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#ifdef HAVE_IAP_MULTIPORT
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if (port && SERn != &SER1)
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SERn = &SER1;
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else if (!port && SERn != &SER0)
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SERn = &SER0;
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port = !port; /* UART0 is headphone, ie IAP1 */
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#else
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(void)port;
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#endif
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while((*SERn->LSR & 0x1))
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{
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temp = (*SERn->RBR_THR_DLL & 0xFF);
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if (newpkt && SERn->autobaud > 0)
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{
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if (SERn->autobaud == 1)
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{
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switch (temp)
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{
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case 0xFF:
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case 0x55:
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break;
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case 0xFC:
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set_bitrate(SERn, 19200);
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temp = 0xFF;
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break;
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case 0xE0:
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set_bitrate(SERn, 9600);
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temp = 0xFF;
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break;
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default:
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badbaud++;
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if (badbaud >= 6) /* Switch baud detection mode */
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{
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SERn->autobaud = 2;
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set_bitrate(SERn, 115200);
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badbaud = 0;
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} else {
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set_bitrate(SERn, 57600);
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}
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continue;
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}
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} else {
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switch (temp)
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{
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case 0xFF:
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case 0x55:
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break;
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case 0xFE:
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set_bitrate(SERn, 57600);
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temp = 0xFF;
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break;
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case 0xFC:
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set_bitrate(SERn, 38400);
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temp = 0xFF;
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break;
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case 0xE0:
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set_bitrate(SERn, 19200);
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temp = 0xFF;
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break;
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default:
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badbaud++;
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if (badbaud >= 6) /* Switch baud detection */
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{
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SERn->autobaud = 1;
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set_bitrate(SERn, 57600);
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badbaud = 0;
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} else {
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set_bitrate(SERn, 115200);
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}
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continue;
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}
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}
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}
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bool pkt = iap_getc(IF_IAP_MP(port,) temp);
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if(newpkt && !pkt)
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SERn->autobaud = 0; /* Found good baud */
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newpkt = pkt;
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}
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}
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#endif
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