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