target/linux/ubicom32/files/arch/ubicom32/mach-ip7k/board-ip7500av.c

   1 /*
   2  * arch/ubicom32/mach-ip7k/board-ip7500av.c
   3  *   Support for IP7500 Audio Video Board + CPU module board.
   4  *
   5  * This file supports the IP7500 Audio Video Board:
   6  *      8007-0810  Rev 1.0
   7  * with one of the following CPU module boards:
   8  *      8007-0510  Rev 1.0
   9  *      8007-0510A Rev 1.0 (with ethernet)
  10  *
  11  * DIP Switch SW2 configuration: (*) default
  12  *      POS 1: on(*) = PCI enabled, off = PCI disabled
  13  *      POS 2: on(*) = TTYX => PA6, off = TTYX => PF12
  14  *      POS 3: on(*) = TTYY => PA7, off = TTYY => PF15
  15  *      POS 4: unused
  16  *
  17  * (C) Copyright 2009, Ubicom, Inc.
  18  *
  19  * This file is part of the Ubicom32 Linux Kernel Port.
  20  *
  21  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  22  * it and/or modify it under the terms of the GNU General Public License
  23  * as published by the Free Software Foundation, either version 2 of the
  24  * License, or (at your option) any later version.
  25  *
  26  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  27  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  28  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  29  * the GNU General Public License for more details.
  30  *
  31  * You should have received a copy of the GNU General Public License
  32  * along with the Ubicom32 Linux Kernel Port.  If not,
  33  * see <http://www.gnu.org/licenses/>.
  34  */
  35
  36 #include <linux/platform_device.h>
  37 #include <linux/device.h>
  38 #include <linux/gpio.h>
  39 #include <linux/i2c.h>
  40 #include <linux/i2c-gpio.h>
  41 #include <linux/delay.h>
  42 #include <asm/board.h>
  43 #include <asm/machdep.h>
  44 #include <asm/ring_tio.h>
  45 #include <asm/vdc_tio.h>
  46 #include <asm/audio.h>
  47 #include <asm/ubi32-pcm.h>
  48 #include <asm/ubi32-cs4384.h>
  49
  50 /******************************************************************************
  51  * Devices on the I2C bus
  52  *
  53  * BEWARE of changing the order of things in this array as we depend on
  54  * certain things to be in certain places.
  55  */
  56 static struct i2c_board_info __initdata ip7500av_i2c_board_info[] = {
  57         /*
  58          * U6, CS4384 DAC, address 0x19
  59          */
  60         {
  61                 .type           = "cs4384",
  62                 .addr           = 0x19,
  63         },
  64 };
  65
  66 /*
  67  * I2C bus on the board, SDA PD1, SCL PD2
  68  */
  69 static struct i2c_gpio_platform_data ip7500av_i2c_data = {
  70         .sda_pin                = GPIO_RD_6,
  71         .scl_pin                = GPIO_RD_3,
  72         .sda_is_open_drain      = 0,
  73         .scl_is_open_drain      = 0,
  74         .udelay                 = 50,
  75 };
  76
  77 static struct platform_device ip7500av_i2c_device = {
  78         .name   = "i2c-gpio",
  79         .id     = 0,
  80         .dev    = {
  81                 .platform_data = &ip7500av_i2c_data,
  82         },
  83 };
  84
  85 /*
  86  * List of possible mclks we can generate.  This depends on the CPU frequency.
  87  */
  88 static struct ubi32_cs4384_mclk_entry ip7500av_cs4384_mclk_entries[] = {
  89         {
  90                 .rate   =       12288000,
  91                 .div    =       44,
  92         },
  93         {
  94                 .rate   =       11289600,
  95                 .div    =       48,
  96         },
  97 };
  98
  99 /*
 100  * List of all devices in our system
 101  */
 102 static struct platform_device *ip7500av_devices[] __initdata = {
 103         &ip7500av_i2c_device,
 104 };
 105
 106 /*
 107  * ip7500av_vdac_write
 108  */
 109 static int __init ip7500av_vdac_write(int reg, int val)
 110 {
 111         struct i2c_adapter *adap;
 112         struct i2c_msg msg[1];
 113         unsigned char data[2];
 114         int err;
 115
 116         adap = i2c_get_adapter(0);
 117         if (!adap) {
 118                 printk(KERN_WARNING "%s: failed to get i2c adapter\n", __FUNCTION__);
 119                 return -ENODEV;
 120         }
 121         msg->addr = 0x2B;
 122         msg->flags = 0;
 123         msg->len = 2;
 124         msg->buf = data;
 125         data[0] = reg;
 126         data[1] = val;
 127         err = i2c_transfer(adap, msg, 1);
 128         i2c_put_adapter(adap);
 129         if (err >= 0) {
 130                 return 0;
 131         }
 132         return err;
 133 }
 134
 135 /*
 136  * ip7500av_vdac_init
 137  *      Initializes the video DAC via I2C
 138  *
 139  * Equivalent mode line: 720x480p = 27 Mhz, 720 736 800 858 480 484 492 525
 140  */
 141 static int __init ip7500av_vdac_init(void)
 142 {
 143         int err;
 144
 145         printk(KERN_INFO "Initializing ADV7393 DAC\n");
 146
 147         /*
 148          * Reset the VDAC
 149          */
 150         if (gpio_request(GPIO_RF_6, "VDAC Reset")) {
 151                 printk(KERN_WARNING "%s: failed to allocate VDAC Reset\n", __FUNCTION__);
 152                 return -EBUSY;
 153         }
 154         gpio_direction_output(GPIO_RF_6, 0);
 155         udelay(1);
 156         gpio_set_value(GPIO_RF_6, 1);
 157
 158         /*
 159          * See table 100 of ADV7393 data sheet: 16-bit 525p YCrCb In, YPbPr Out
 160          */
 161         err = ip7500av_vdac_write(0x17, 0x02);
 162         if (err) {
 163                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
 164                 return err;
 165         }
 166         err = ip7500av_vdac_write(0x00, 0x1c);
 167         if (err) {
 168                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
 169                 return err;
 170         }
 171         err = ip7500av_vdac_write(0x01, 0x10);
 172         if (err) {
 173                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
 174                 return err;
 175         }
 176         err = ip7500av_vdac_write(0x31, 0x01);
 177         if (err) {
 178                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
 179                 return err;
 180         }
 181 #ifdef IP7500AV_VDAC_SWAP_PBPR
 182         err = ip7500av_vdac_write(0x35, 0x08);
 183         if (err) {
 184                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
 185                 return err;
 186         }
 187 #endif
 188 #ifdef IP7500AV_VDAC_FULL_RANGE
 189         err = ip7500av_vdac_write(0x30, 0x02);
 190         if (err) {
 191                 printk(KERN_WARNING "%s: failed to write VDAC\n", __FUNCTION__);
 192                 return err;
 193         }
 194 #endif
 195         return 0;
 196 }
 197 late_initcall(ip7500av_vdac_init);
 198
 199 /*
 200  * ip7500av_init
 201  *      Called to add the devices which we have on this board
 202  */
 203 static int __init ip7500av_init(void)
 204 {
 205         struct platform_device *audio_dev;
 206         struct platform_device *audio_dev2;
 207         struct ubi32_cs4384_platform_data *cs4384_pd;
 208
 209         board_init();
 210
 211         ubi_gpio_init();
 212
 213         vdc_tio_init();
 214
 215         printk(KERN_INFO "%s: registering device resources\n", __FUNCTION__);
 216         platform_add_devices(ip7500av_devices, ARRAY_SIZE(ip7500av_devices));
 217
 218         /*
 219          * CS4384 DAC
 220          */
 221         audio_dev = audio_device_alloc("snd-ubi32-cs4384", "audio", "audio-i2sout",
 222                         sizeof(struct ubi32_cs4384_platform_data));
 223         if (audio_dev) {
 224                 /*
 225                  * Attempt to figure out a good divisor.  This will only work
 226                  * assuming the core frequency is compatible.
 227                  */
 228                 int i;
 229                 unsigned int freq = processor_frequency();
 230                 for (i = 0; i < ARRAY_SIZE(ip7500av_cs4384_mclk_entries); i++) {
 231                         unsigned int div;
 232                         unsigned int rate = ip7500av_cs4384_mclk_entries[i].rate / 1000;
 233                         div = ((freq / rate) + 500) / 1000;
 234                         ip7500av_cs4384_mclk_entries[i].div = div;
 235                         printk("CS4384 mclk %d rate %u000Hz div %u act %u\n", i, rate, div, freq / div);
 236                 }
 237
 238                 cs4384_pd = audio_device_priv(audio_dev);
 239                 cs4384_pd->mclk_src = UBI32_CS4384_MCLK_PWM_0;
 240                 cs4384_pd->n_mclk = ARRAY_SIZE(ip7500av_cs4384_mclk_entries);
 241                 cs4384_pd->mclk_entries = ip7500av_cs4384_mclk_entries;
 242                 ip7500av_i2c_board_info[0].platform_data = audio_dev;
 243
 244                 /*
 245                  * Reset the DAC
 246                  */
 247                 if (gpio_request(GPIO_RF_4, "DAC Reset") == 0) {
 248                         gpio_direction_output(GPIO_RF_4, 0);
 249                         udelay(1);
 250                         gpio_direction_output(GPIO_RF_4, 1);
 251                 } else {
 252                         printk("Unable to request DAC reset GPIO\n");
 253                 }
 254         }
 255
 256         /*
 257          * SPDIF port
 258          */
 259         audio_dev2 = audio_device_alloc("snd-ubi32-generic", "audio", "audio-spdifout", 0);
 260         if (audio_dev2) {
 261                 platform_device_register(audio_dev2);
 262         }
 263
 264         /*
 265          * Register all of the devices which sit on the I2C bus
 266          */
 267         printk(KERN_INFO "%s: registering i2c resources\n", __FUNCTION__);
 268         i2c_register_board_info(0, ip7500av_i2c_board_info, ARRAY_SIZE(ip7500av_i2c_board_info));
 269
 270         printk(KERN_INFO "IP7500 Audio/Video Board\n");
 271         return 0;
 272 }
 273 arch_initcall(ip7500av_init);