From ecaa40166000e3d6b49542d42804127c0a6079e2 Mon Sep 17 00:00:00 2001 From: andypotter Date: Mon, 15 Apr 2013 20:09:39 +0100 Subject: Add Serial Port 1 support for iPod Photo/Color/4G/Mini2G Based on FS#9920 by Ryan Press with changes to selection logic so that it works on my iPod Photo. Should also work on iPod Color/4G and Mini2G. Moved all target specific code from firmware/drivers/serial.c into new file firmware/target/arm/pp/uart-pp.c in the same manner as other target specific uart code. Update to fix build error on ipodmini2g by adding defines in config file. Removed unwanted whitespace Tested on iPod Photo. Change-Id: Ia5539563966198e06372d70b5adf2ef78882f863 Reviewed-on: http://gerrit.rockbox.org/455 Reviewed-by: andypotter Tested-by: andypotter Reviewed-by: Marcin Bukat --- firmware/target/arm/pp/uart-pp.c | 265 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 265 insertions(+) create mode 100644 firmware/target/arm/pp/uart-pp.c (limited to 'firmware/target/arm/pp/uart-pp.c') diff --git a/firmware/target/arm/pp/uart-pp.c b/firmware/target/arm/pp/uart-pp.c new file mode 100644 index 0000000000..612ffdf77c --- /dev/null +++ b/firmware/target/arm/pp/uart-pp.c @@ -0,0 +1,265 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2002 by Alan Korr & Nick Robinson + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#include +#include +#include +#include "button.h" +#include "config.h" +#include "cpu.h" +#include "system.h" +#include "kernel.h" +#include "lcd.h" +#include "serial.h" +#include "iap.h" + +#if defined(IPOD_ACCESSORY_PROTOCOL) +static int autobaud = 0; +volatile unsigned long * base_RBR, * base_THR, * base_LCR, * base_LSR, * base_DLL; + +static void set_bitrate(unsigned int rate) +{ + unsigned int divisor; + + divisor = 24000000L / rate / 16; + *base_LCR = 0x80; /* Divisor latch enable */ + *base_DLL = (divisor >> 0) & 0xFF; + *base_LCR = 0x03; /* Divisor latch disable, 8-N-1 */ +} + +void serial_setup (void) +{ + int tmp; + +#if defined(IPOD_COLOR) || defined(IPOD_4G) || defined(IPOD_MINI2G) + + /* Route the Tx/Rx pins. 4G Ipod, ser1, dock connector */ + GPIO_CLEAR_BITWISE(GPIOD_ENABLE, 0x6); + GPIO_CLEAR_BITWISE(GPIOD_OUTPUT_EN, 0x6); + + outl(0x70000018, inl(0x70000018) & ~0xc00); + + base_RBR = &SER1_RBR; + base_THR = &SER1_THR; + base_LCR = &SER1_LCR; + base_LSR = &SER1_LSR; + base_DLL = &SER1_DLL; + + DEV_EN |= DEV_SER1; + CPU_HI_INT_DIS = SER1_MASK; + + DEV_RS |= DEV_SER1; + sleep(1); + DEV_RS &= ~DEV_SER1; + + SER1_LCR = 0x80; /* Divisor latch enable */ + SER1_DLM = 0x00; + SER1_LCR = 0x03; /* Divisor latch disable, 8-N-1 */ + SER1_IER = 0x01; + + SER1_FCR = 0x07; /* Tx+Rx FIFO reset and FIFO enable */ + + CPU_INT_EN = HI_MASK; + CPU_HI_INT_EN = SER1_MASK; + tmp = SER1_RBR; + +#elif defined(IPOD_NANO) || defined(IPOD_VIDEO) + /* Route the Tx/Rx pins. 5G Ipod */ + (*(volatile unsigned long *)(0x7000008C)) &= ~0x0C; + GPO32_ENABLE &= ~0x0C; + + base_RBR = &SER0_RBR; + base_THR = &SER0_THR; + base_LCR = &SER0_LCR; + base_LSR = &SER0_LSR; + base_DLL = &SER0_DLL; + + DEV_EN = DEV_EN | DEV_SER0; + CPU_HI_INT_DIS = SER0_MASK; + + DEV_RS |= DEV_SER0; + sleep(1); + DEV_RS &= ~DEV_SER0; + + SER0_LCR = 0x80; /* Divisor latch enable */ + SER0_DLM = 0x00; + SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */ + SER0_IER = 0x01; + + SER0_FCR = 0x07; /* Tx+Rx FIFO reset and FIFO enable */ + + CPU_INT_EN = HI_MASK; + CPU_HI_INT_EN = SER0_MASK; + tmp = SER0_RBR; + +#else + + /* Default Route the Tx/Rx pins. 4G Ipod, ser0, top connector */ + + GPIO_CLEAR_BITWISE(GPIOC_INT_EN, 0x8); + GPIO_CLEAR_BITWISE(GPIOC_INT_LEV, 0x8); + GPIOC_INT_CLR = 0x8; + + base_RBR = &SER0_RBR; + base_THR = &SER0_THR; + base_LCR = &SER0_LCR; + base_LSR = &SER0_LSR; + base_DLL = &SER0_DLL; + + DEV_EN |= DEV_SER0; + CPU_HI_INT_DIS = SER0_MASK; + + DEV_RS |= DEV_SER0; + sleep(1); + DEV_RS &= ~DEV_SER0; + + SER0_LCR = 0x80; /* Divisor latch enable */ + SER0_DLM = 0x00; + SER0_LCR = 0x03; /* Divisor latch disable, 8-N-1 */ + SER0_IER = 0x01; + + SER0_FCR = 0x07; /* Tx+Rx FIFO reset and FIFO enable */ + + CPU_INT_EN = HI_MASK; + CPU_HI_INT_EN = SER0_MASK; + tmp = SER0_RBR; + +#endif + + serial_bitrate(0); +} + +void serial_bitrate(int rate) +{ + if(rate == 0) + { + autobaud = 2; + set_bitrate(115200); + } + else + { + autobaud = 0; + set_bitrate(rate); + } +} + +int tx_rdy(void) +{ + if((*base_LSR & 0x20)) + return 1; + else + return 0; +} + +static int rx_rdy(void) +{ + if((*base_LSR & 0x1)) + return 1; + else + return 0; +} + +void tx_writec(unsigned char c) +{ + *base_THR =(int) c; +} + +static unsigned char rx_readc(void) +{ + return (*base_RBR & 0xFF); +} + +void SERIAL_ISR(void) +{ + static int badbaud = 0; + static bool newpkt = true; + char temp; + + while(rx_rdy()) + { + temp = rx_readc(); + if (newpkt && autobaud > 0) + { + if (autobaud == 1) + { + switch (temp) + { + case 0xFF: + case 0x55: + break; + case 0xFC: + set_bitrate(19200); + temp = 0xFF; + break; + case 0xE0: + set_bitrate(9600); + temp = 0xFF; + break; + default: + badbaud++; + if (badbaud >= 6) /* Switch baud detection mode */ + { + autobaud = 2; + set_bitrate(115200); + badbaud = 0; + } else { + set_bitrate(57600); + } + continue; + } + } else { + switch (temp) + { + case 0xFF: + case 0x55: + break; + case 0xFE: + set_bitrate(57600); + temp = 0xFF; + break; + case 0xFC: + set_bitrate(38400); + temp = 0xFF; + break; + case 0xE0: + set_bitrate(19200); + temp = 0xFF; + break; + default: + badbaud++; + if (badbaud >= 6) /* Switch baud detection */ + { + autobaud = 1; + set_bitrate(57600); + badbaud = 0; + } else { + set_bitrate(115200); + } + continue; + } + } + } + bool pkt = iap_getc(temp); + if(newpkt && !pkt) + autobaud = 0; /* Found good baud */ + newpkt = pkt; + } +} +#endif -- cgit v1.2.3