diff options
Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/mach-ip7k/board-ip7500av.c')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/mach-ip7k/board-ip7500av.c | 273 |
1 files changed, 273 insertions, 0 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/mach-ip7k/board-ip7500av.c b/target/linux/ubicom32/files/arch/ubicom32/mach-ip7k/board-ip7500av.c new file mode 100644 index 000000000..7cd25fcd3 --- /dev/null +++ b/target/linux/ubicom32/files/arch/ubicom32/mach-ip7k/board-ip7500av.c @@ -0,0 +1,273 @@ +/* + * 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); |