273 lines
6.8 KiB
C
273 lines
6.8 KiB
C
/*
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* arch/ubicom32/mach-ip7k/board-ip7500av.c
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* Support for IP7500 Audio Video Board + CPU module board.
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*
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* This file supports the IP7500 Audio Video Board:
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* 8007-0810 Rev 1.0
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* with one of the following CPU module boards:
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* 8007-0510 Rev 1.0
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* 8007-0510A Rev 1.0 (with ethernet)
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*
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* DIP Switch SW2 configuration: (*) default
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* POS 1: on(*) = PCI enabled, off = PCI disabled
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* POS 2: on(*) = TTYX => PA6, off = TTYX => PF12
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* POS 3: on(*) = TTYY => PA7, off = TTYY => PF15
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* POS 4: unused
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*
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* (C) Copyright 2009, Ubicom, Inc.
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*
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* This file is part of the Ubicom32 Linux Kernel Port.
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*
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* The Ubicom32 Linux Kernel Port is free software: you can redistribute
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* it and/or 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 of the
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* License, or (at your option) any later version.
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*
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* The Ubicom32 Linux Kernel Port is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Ubicom32 Linux Kernel Port. If not,
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* see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/platform_device.h>
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#include <linux/device.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/i2c-gpio.h>
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#include <linux/delay.h>
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#include <asm/board.h>
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#include <asm/machdep.h>
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#include <asm/ring_tio.h>
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#include <asm/vdc_tio.h>
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#include <asm/audio.h>
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#include <asm/ubi32-pcm.h>
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#include <asm/ubi32-cs4384.h>
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/******************************************************************************
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* Devices on the I2C bus
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*
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* BEWARE of changing the order of things in this array as we depend on
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* certain things to be in certain places.
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*/
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static struct i2c_board_info __initdata ip7500av_i2c_board_info[] = {
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/*
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* U6, CS4384 DAC, address 0x19
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*/
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{
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.type = "cs4384",
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.addr = 0x19,
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},
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};
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/*
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* I2C bus on the board, SDA PD1, SCL PD2
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*/
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static struct i2c_gpio_platform_data ip7500av_i2c_data = {
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.sda_pin = GPIO_RD_6,
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.scl_pin = GPIO_RD_3,
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.sda_is_open_drain = 0,
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.scl_is_open_drain = 0,
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.udelay = 50,
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};
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static struct platform_device ip7500av_i2c_device = {
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.name = "i2c-gpio",
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.id = 0,
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.dev = {
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.platform_data = &ip7500av_i2c_data,
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},
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};
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/*
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* List of possible mclks we can generate. This depends on the CPU frequency.
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*/
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static struct ubi32_cs4384_mclk_entry ip7500av_cs4384_mclk_entries[] = {
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{
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.rate = 12288000,
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.div = 44,
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},
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{
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.rate = 11289600,
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.div = 48,
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},
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};
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/*
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* List of all devices in our system
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*/
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static struct platform_device *ip7500av_devices[] __initdata = {
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&ip7500av_i2c_device,
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};
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/*
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* ip7500av_vdac_write
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*/
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static int __init ip7500av_vdac_write(int reg, int val)
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{
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struct i2c_adapter *adap;
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struct i2c_msg msg[1];
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unsigned char data[2];
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int err;
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adap = i2c_get_adapter(0);
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if (!adap) {
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printk(KERN_WARNING "%s: failed to get i2c adapter\n", __FUNCTION__);
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return -ENODEV;
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}
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msg->addr = 0x2B;
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msg->flags = 0;
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msg->len = 2;
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msg->buf = data;
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data[0] = reg;
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data[1] = val;
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err = i2c_transfer(adap, msg, 1);
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i2c_put_adapter(adap);
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if (err >= 0) {
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return 0;
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}
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return err;
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}
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/*
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* ip7500av_vdac_init
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* Initializes the video DAC via I2C
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*
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* Equivalent mode line: 720x480p = 27 Mhz, 720 736 800 858 480 484 492 525
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*/
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static int __init ip7500av_vdac_init(void)
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{
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int err;
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printk(KERN_INFO "Initializing ADV7393 DAC\n");
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/*
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* Reset the VDAC
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*/
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if (gpio_request(GPIO_RF_6, "VDAC Reset")) {
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printk(KERN_WARNING "%s: failed to allocate VDAC Reset\n", __FUNCTION__);
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return -EBUSY;
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}
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gpio_direction_output(GPIO_RF_6, 0);
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udelay(1);
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gpio_set_value(GPIO_RF_6, 1);
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/*
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* See table 100 of ADV7393 data sheet: 16-bit 525p YCrCb In, YPbPr Out
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*/
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err = ip7500av_vdac_write(0x17, 0x02);
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if (err) {
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printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
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return err;
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}
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err = ip7500av_vdac_write(0x00, 0x1c);
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if (err) {
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printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
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return err;
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}
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err = ip7500av_vdac_write(0x01, 0x10);
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if (err) {
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printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
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return err;
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}
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err = ip7500av_vdac_write(0x31, 0x01);
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if (err) {
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printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
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return err;
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}
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#ifdef IP7500AV_VDAC_SWAP_PBPR
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err = ip7500av_vdac_write(0x35, 0x08);
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if (err) {
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printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
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return err;
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}
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#endif
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#ifdef IP7500AV_VDAC_FULL_RANGE
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err = ip7500av_vdac_write(0x30, 0x02);
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if (err) {
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printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
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return err;
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}
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#endif
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return 0;
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}
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late_initcall(ip7500av_vdac_init);
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/*
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* ip7500av_init
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* Called to add the devices which we have on this board
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*/
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static int __init ip7500av_init(void)
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{
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struct platform_device *audio_dev;
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struct platform_device *audio_dev2;
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struct ubi32_cs4384_platform_data *cs4384_pd;
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board_init();
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ubi_gpio_init();
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vdc_tio_init();
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printk(KERN_INFO "%s: registering device resources\n", __FUNCTION__);
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platform_add_devices(ip7500av_devices, ARRAY_SIZE(ip7500av_devices));
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/*
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* CS4384 DAC
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*/
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audio_dev = audio_device_alloc("snd-ubi32-cs4384", "audio", "audio-i2sout",
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sizeof(struct ubi32_cs4384_platform_data));
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if (audio_dev) {
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/*
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* Attempt to figure out a good divisor. This will only work
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* assuming the core frequency is compatible.
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*/
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int i;
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unsigned int freq = processor_frequency();
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for (i = 0; i < ARRAY_SIZE(ip7500av_cs4384_mclk_entries); i++) {
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unsigned int div;
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unsigned int rate = ip7500av_cs4384_mclk_entries[i].rate / 1000;
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div = ((freq / rate) + 500) / 1000;
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ip7500av_cs4384_mclk_entries[i].div = div;
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printk("CS4384 mclk %d rate %u000Hz div %u act %u\n", i, rate, div, freq / div);
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}
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cs4384_pd = audio_device_priv(audio_dev);
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cs4384_pd->mclk_src = UBI32_CS4384_MCLK_PWM_0;
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cs4384_pd->n_mclk = ARRAY_SIZE(ip7500av_cs4384_mclk_entries);
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cs4384_pd->mclk_entries = ip7500av_cs4384_mclk_entries;
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ip7500av_i2c_board_info[0].platform_data = audio_dev;
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/*
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* Reset the DAC
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*/
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if (gpio_request(GPIO_RF_4, "DAC Reset") == 0) {
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gpio_direction_output(GPIO_RF_4, 0);
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udelay(1);
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gpio_direction_output(GPIO_RF_4, 1);
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} else {
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printk("Unable to request DAC reset GPIO\n");
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}
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}
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/*
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* SPDIF port
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*/
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audio_dev2 = audio_device_alloc("snd-ubi32-generic", "audio", "audio-spdifout", 0);
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if (audio_dev2) {
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platform_device_register(audio_dev2);
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}
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/*
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* Register all of the devices which sit on the I2C bus
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*/
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printk(KERN_INFO "%s: registering i2c resources\n", __FUNCTION__);
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i2c_register_board_info(0, ip7500av_i2c_board_info, ARRAY_SIZE(ip7500av_i2c_board_info));
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printk(KERN_INFO "IP7500 Audio/Video Board\n");
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return 0;
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}
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arch_initcall(ip7500av_init);
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