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hdmi_sii9022.c

/* Copyright (c) 2009, Code Aurora Forum. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#include <linux/i2c.h>
#include <linux/delay.h>
#include "msm_fb.h"

#define DEVICE_NAME "sii9022"
#define SII9022_DEVICE_ID   0xB0

struct sii9022_i2c_addr_data{
      u8 addr;
      u8 data;
};

/* video mode data */
static u8 video_mode_data[] = {
      0x00,
      0xF9, 0x1C, 0x70, 0x17, 0x72, 0x06, 0xEE, 0x02,
};

static u8 avi_io_format[] = {
      0x09,
      0x00, 0x00,
};

/* power state */
static struct sii9022_i2c_addr_data regset0[] = {
      { 0x60, 0x04 },
      { 0x63, 0x00 },
      { 0x1E, 0x00 },
};

static u8 video_infoframe[] = {
      0x0C,
      0xF0, 0x00, 0x68, 0x00, 0x04, 0x00, 0x19, 0x00,
      0xE9, 0x02, 0x04, 0x01, 0x04, 0x06,
};

/* configure audio */
static struct sii9022_i2c_addr_data regset1[] = {
      { 0x26, 0x90 },
      { 0x20, 0x90 },
      { 0x1F, 0x80 },
      { 0x26, 0x80 },
      { 0x24, 0x02 },
      { 0x25, 0x0B },
      { 0xBC, 0x02 },
      { 0xBD, 0x24 },
      { 0xBE, 0x02 },
};

/* enable audio */
static u8 misc_infoframe[] = {
      0xBF,
      0xC2, 0x84, 0x01, 0x0A, 0x6F, 0x02, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};

/* set HDMI, active */
static struct sii9022_i2c_addr_data regset2[] = {
      { 0x1A, 0x01 },
      { 0x3D, 0x00 },
};

static int send_i2c_data(struct i2c_client *client,
                   struct sii9022_i2c_addr_data *regset,
                   int size)
{
      int i;
      int rc = 0;

      for (i = 0; i < size; i++) {
            rc = i2c_smbus_write_byte_data(
                  client,
                  regset[i].addr, regset[i].data);
            if (rc)
                  break;
      }
      return rc;
}

static int hdmi_sii_enable(struct i2c_client *client)
{
      int rc;
      int retries = 10;
      int count;

      rc = i2c_smbus_write_byte_data(client, 0xC7, 0x00);
      if (rc)
            goto enable_exit;

      do {
            msleep(1);
            rc = i2c_smbus_read_byte_data(client, 0x1B);
      } while ((rc != SII9022_DEVICE_ID) && retries--);

      if (rc != SII9022_DEVICE_ID)
            return -ENODEV;

      rc = i2c_smbus_write_byte_data(client, 0x1A, 0x11);
      if (rc)
            goto enable_exit;

      count = ARRAY_SIZE(video_mode_data);
      rc = i2c_master_send(client, video_mode_data, count);
      if (rc != count) {
            rc = -EIO;
            goto enable_exit;
      }

      rc = i2c_smbus_write_byte_data(client, 0x08, 0x20);
      if (rc)
            goto enable_exit;
      count = ARRAY_SIZE(avi_io_format);
      rc = i2c_master_send(client, avi_io_format, count);
      if (rc != count) {
            rc = -EIO;
            goto enable_exit;
      }

      rc = send_i2c_data(client, regset0, ARRAY_SIZE(regset0));
      if (rc)
            goto enable_exit;

      count = ARRAY_SIZE(video_infoframe);
      rc = i2c_master_send(client, video_infoframe, count);
      if (rc != count) {
            rc = -EIO;
            goto enable_exit;
      }

      rc = send_i2c_data(client, regset1, ARRAY_SIZE(regset1));
      if (rc)
            goto enable_exit;

      count = ARRAY_SIZE(misc_infoframe);
      rc = i2c_master_send(client, misc_infoframe, count);
      if (rc != count) {
            rc = -EIO;
            goto enable_exit;
      }

      rc = send_i2c_data(client, regset2, ARRAY_SIZE(regset2));
      if (rc)
            goto enable_exit;

      return 0;
enable_exit:
      printk(KERN_ERR "%s: exited rc=%d\n", __func__, rc);
      return rc;
}

static const struct i2c_device_id hmdi_sii_id[] = {
      { DEVICE_NAME, 0 },
      { }
};

static int hdmi_sii_probe(struct i2c_client *client,
                  const struct i2c_device_id *id)
{
      int rc;

      if (!i2c_check_functionality(client->adapter,
                             I2C_FUNC_SMBUS_BYTE | I2C_FUNC_I2C))
            return -ENODEV;
      rc = hdmi_sii_enable(client);
      return rc;
}


static struct i2c_driver hdmi_sii_i2c_driver = {
      .driver = {
            .name = DEVICE_NAME,
            .owner = THIS_MODULE,
      },
      .probe = hdmi_sii_probe,
      .remove =  __exit_p(hdmi_sii_remove),
      .id_table = hmdi_sii_id,
};

static int __init hdmi_sii_init(void)
{
      int ret;
      struct msm_panel_info pinfo;

      if (msm_fb_detect_client("hdmi_sii9022"))
            return 0;

      pinfo.xres = 1280;
      pinfo.yres = 720;
      pinfo.type = HDMI_PANEL;
      pinfo.pdest = DISPLAY_1;
      pinfo.wait_cycle = 0;
      pinfo.bpp = 18;
      pinfo.fb_num = 2;
      pinfo.clk_rate = 74250000;

      pinfo.lcdc.h_back_porch = 124;
      pinfo.lcdc.h_front_porch = 110;
      pinfo.lcdc.h_pulse_width = 136;
      pinfo.lcdc.v_back_porch = 19;
      pinfo.lcdc.v_front_porch = 5;
      pinfo.lcdc.v_pulse_width = 6;
      pinfo.lcdc.border_clr = 0;
      pinfo.lcdc.underflow_clr = 0xff;
      pinfo.lcdc.hsync_skew = 0;

      ret = lcdc_device_register(&pinfo);
      if (ret) {
            printk(KERN_ERR "%s: failed to register device\n", __func__);
            goto init_exit;
      }

      ret = i2c_add_driver(&hdmi_sii_i2c_driver);
      if (ret)
            printk(KERN_ERR "%s: failed to add i2c driver\n", __func__);

init_exit:
      return ret;
}

static void __exit hdmi_sii_exit(void)
{
      i2c_del_driver(&hdmi_sii_i2c_driver);
}

module_init(hdmi_sii_init);
module_exit(hdmi_sii_exit);
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0.1");
MODULE_AUTHOR("Qualcomm Innovation Center, Inc.");
MODULE_DESCRIPTION("SiI9022 HDMI driver");
MODULE_ALIAS("platform:hdmi-sii9022");

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