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msp3400-driver.c

/*
 * Programming the mspx4xx sound processor family
 *
 * (c) 1997-2001 Gerd Knorr <kraxel@bytesex.org>
 *
 * what works and what doesn't:
 *
 *  AM-Mono
 *      Support for Hauppauge cards added (decoding handled by tuner) added by
 *      Frederic Crozat <fcrozat@mail.dotcom.fr>
 *
 *  FM-Mono
 *      should work. The stereo modes are backward compatible to FM-mono,
 *      therefore FM-Mono should be allways available.
 *
 *  FM-Stereo (B/G, used in germany)
 *      should work, with autodetect
 *
 *  FM-Stereo (satellite)
 *      should work, no autodetect (i.e. default is mono, but you can
 *      switch to stereo -- untested)
 *
 *  NICAM (B/G, L , used in UK, Scandinavia, Spain and France)
 *      should work, with autodetect. Support for NICAM was added by
 *      Pekka Pietikainen <pp@netppl.fi>
 *
 * TODO:
 *   - better SAT support
 *
 * 980623  Thomas Sailer (sailer@ife.ee.ethz.ch)
 *         using soundcore instead of OSS
 *
 * This program 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.
 *
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/videodev.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/tvaudio.h>
#include <media/msp3400.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include "msp3400-driver.h"

/* ---------------------------------------------------------------------- */

MODULE_DESCRIPTION("device driver for msp34xx TV sound processor");
MODULE_AUTHOR("Gerd Knorr");
MODULE_LICENSE("GPL");

/* module parameters */
static int opmode   = OPMODE_AUTO;
int msp_debug;           /* msp_debug output */
int msp_once;            /* no continous stereo monitoring */
int msp_amsound;   /* hard-wire AM sound at 6.5 Hz (france),
                      the autoscan seems work well only with FM... */
int msp_standard = 1;    /* Override auto detect of audio msp_standard, if needed. */
int msp_dolby;

int msp_stereo_thresh = 0x190; /* a2 threshold for stereo/bilingual
                              (msp34xxg only) 0x00a0-0x03c0 */

/* read-only */
module_param(opmode,           int, 0444);

/* read-write */
module_param_named(once,msp_once,                      bool, 0644);
module_param_named(debug,msp_debug,                    int,  0644);
module_param_named(stereo_threshold,msp_stereo_thresh, int,  0644);
module_param_named(standard,msp_standard,              int,  0644);
module_param_named(amsound,msp_amsound,                bool, 0644);
module_param_named(dolby,msp_dolby,                    bool, 0644);

MODULE_PARM_DESC(opmode, "Forces a MSP3400 opmode. 0=Manual, 1=Autodetect, 2=Autodetect and autoselect");
MODULE_PARM_DESC(once, "No continuous stereo monitoring");
MODULE_PARM_DESC(debug, "Enable debug messages [0-3]");
MODULE_PARM_DESC(stereo_threshold, "Sets signal threshold to activate stereo");
MODULE_PARM_DESC(standard, "Specify audio standard: 32 = NTSC, 64 = radio, Default: Autodetect");
MODULE_PARM_DESC(amsound, "Hardwire AM sound at 6.5Hz (France), FM can autoscan");
MODULE_PARM_DESC(dolby, "Activates Dolby processsing");

/* ---------------------------------------------------------------------- */

/* control subaddress */
#define I2C_MSP_CONTROL 0x00
/* demodulator unit subaddress */
#define I2C_MSP_DEM     0x10
/* DSP unit subaddress */
#define I2C_MSP_DSP     0x12

/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x80 >> 1, 0x88 >> 1, I2C_CLIENT_END };
I2C_CLIENT_INSMOD;

/* ----------------------------------------------------------------------- */
/* functions for talking to the MSP3400C Sound processor                   */

int msp_reset(struct i2c_client *client)
{
      /* reset and read revision code */
      static u8 reset_off[3] = { I2C_MSP_CONTROL, 0x80, 0x00 };
      static u8 reset_on[3]  = { I2C_MSP_CONTROL, 0x00, 0x00 };
      static u8 write[3]     = { I2C_MSP_DSP + 1, 0x00, 0x1e };
      u8 read[2];
      struct i2c_msg reset[2] = {
            { client->addr, I2C_M_IGNORE_NAK, 3, reset_off },
            { client->addr, I2C_M_IGNORE_NAK, 3, reset_on  },
      };
      struct i2c_msg test[2] = {
            { client->addr, 0,        3, write },
            { client->addr, I2C_M_RD, 2, read  },
      };

      v4l_dbg(3, msp_debug, client, "msp_reset\n");
      if (i2c_transfer(client->adapter, &reset[0], 1) != 1 ||
          i2c_transfer(client->adapter, &reset[1], 1) != 1 ||
          i2c_transfer(client->adapter, test, 2) != 2) {
            v4l_err(client, "chip reset failed\n");
            return -1;
      }
      return 0;
}

static int msp_read(struct i2c_client *client, int dev, int addr)
{
      int err, retval;
      u8 write[3];
      u8 read[2];
      struct i2c_msg msgs[2] = {
            { client->addr, 0,        3, write },
            { client->addr, I2C_M_RD, 2, read  }
      };

      write[0] = dev + 1;
      write[1] = addr >> 8;
      write[2] = addr & 0xff;

      for (err = 0; err < 3; err++) {
            if (i2c_transfer(client->adapter, msgs, 2) == 2)
                  break;
            v4l_warn(client, "I/O error #%d (read 0x%02x/0x%02x)\n", err,
                   dev, addr);
            schedule_timeout_interruptible(msecs_to_jiffies(10));
      }
      if (err == 3) {
            v4l_warn(client, "giving up, resetting chip. Sound will go off, sorry folks :-|\n");
            msp_reset(client);
            return -1;
      }
      retval = read[0] << 8 | read[1];
      v4l_dbg(3, msp_debug, client, "msp_read(0x%x, 0x%x): 0x%x\n", dev, addr, retval);
      return retval;
}

int msp_read_dem(struct i2c_client *client, int addr)
{
      return msp_read(client, I2C_MSP_DEM, addr);
}

int msp_read_dsp(struct i2c_client *client, int addr)
{
      return msp_read(client, I2C_MSP_DSP, addr);
}

static int msp_write(struct i2c_client *client, int dev, int addr, int val)
{
      int err;
      u8 buffer[5];

      buffer[0] = dev;
      buffer[1] = addr >> 8;
      buffer[2] = addr &  0xff;
      buffer[3] = val  >> 8;
      buffer[4] = val  &  0xff;

      v4l_dbg(3, msp_debug, client, "msp_write(0x%x, 0x%x, 0x%x)\n", dev, addr, val);
      for (err = 0; err < 3; err++) {
            if (i2c_master_send(client, buffer, 5) == 5)
                  break;
            v4l_warn(client, "I/O error #%d (write 0x%02x/0x%02x)\n", err,
                   dev, addr);
            schedule_timeout_interruptible(msecs_to_jiffies(10));
      }
      if (err == 3) {
            v4l_warn(client, "giving up, resetting chip. Sound will go off, sorry folks :-|\n");
            msp_reset(client);
            return -1;
      }
      return 0;
}

int msp_write_dem(struct i2c_client *client, int addr, int val)
{
      return msp_write(client, I2C_MSP_DEM, addr, val);
}

int msp_write_dsp(struct i2c_client *client, int addr, int val)
{
      return msp_write(client, I2C_MSP_DSP, addr, val);
}

/* ----------------------------------------------------------------------- *
 * bits  9  8  5 - SCART DSP input Select:
 *       0  0  0 - SCART 1 to DSP input (reset position)
 *       0  1  0 - MONO to DSP input
 *       1  0  0 - SCART 2 to DSP input
 *       1  1  1 - Mute DSP input
 *
 * bits 11 10  6 - SCART 1 Output Select:
 *       0  0  0 - undefined (reset position)
 *       0  1  0 - SCART 2 Input to SCART 1 Output (for devices with 2 SCARTS)
 *       1  0  0 - MONO input to SCART 1 Output
 *       1  1  0 - SCART 1 DA to SCART 1 Output
 *       0  0  1 - SCART 2 DA to SCART 1 Output
 *       0  1  1 - SCART 1 Input to SCART 1 Output
 *       1  1  1 - Mute SCART 1 Output
 *
 * bits 13 12  7 - SCART 2 Output Select (for devices with 2 Output SCART):
 *       0  0  0 - SCART 1 DA to SCART 2 Output (reset position)
 *       0  1  0 - SCART 1 Input to SCART 2 Output
 *       1  0  0 - MONO input to SCART 2 Output
 *       0  0  1 - SCART 2 DA to SCART 2 Output
 *       0  1  1 - SCART 2 Input to SCART 2 Output
 *       1  1  0 - Mute SCART 2 Output
 *
 * Bits 4 to 0 should be zero.
 * ----------------------------------------------------------------------- */

static int scarts[3][9] = {
      /* MASK   IN1     IN2     IN3     IN4     IN1_DA  IN2_DA  MONO    MUTE   */
      /* SCART DSP Input select */
      { 0x0320, 0x0000, 0x0200, 0x0300, 0x0020, -1,     -1,     0x0100, 0x0320 },
      /* SCART1 Output select */
      { 0x0c40, 0x0440, 0x0400, 0x0000, 0x0840, 0x0c00, 0x0040, 0x0800, 0x0c40 },
      /* SCART2 Output select */
      { 0x3080, 0x1000, 0x1080, 0x2080, 0x3080, 0x0000, 0x0080, 0x2000, 0x3000 },
};

static char *scart_names[] = {
      "in1", "in2", "in3", "in4", "in1 da", "in2 da", "mono", "mute"
};

void msp_set_scart(struct i2c_client *client, int in, int out)
{
      struct msp_state *state = i2c_get_clientdata(client);

      state->in_scart = in;

      if (in >= 0 && in <= 7 && out >= 0 && out <= 2) {
            if (-1 == scarts[out][in + 1])
                  return;

            state->acb &= ~scarts[out][0];
            state->acb |=  scarts[out][in + 1];
      } else
            state->acb = 0xf60; /* Mute Input and SCART 1 Output */

      v4l_dbg(1, msp_debug, client, "scart switch: %s => %d (ACB=0x%04x)\n",
                                    scart_names[in], out, state->acb);
      msp_write_dsp(client, 0x13, state->acb);

      /* Sets I2S speed 0 = 1.024 Mbps, 1 = 2.048 Mbps */
      if (state->has_i2s_conf)
            msp_write_dem(client, 0x40, state->i2s_mode);
}

void msp_set_audio(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);
      int bal = 0, bass, treble, loudness;
      int val = 0;
      int reallymuted = state->muted | state->scan_in_progress;

      if (!reallymuted)
            val = (state->volume * 0x7f / 65535) << 8;

      v4l_dbg(1, msp_debug, client, "mute=%s scanning=%s volume=%d\n",
            state->muted ? "on" : "off", state->scan_in_progress ? "yes" : "no",
            state->volume);

      msp_write_dsp(client, 0x0000, val);
      msp_write_dsp(client, 0x0007, reallymuted ? 0x1 : (val | 0x1));
      if (state->has_scart2_out_volume)
            msp_write_dsp(client, 0x0040, reallymuted ? 0x1 : (val | 0x1));
      if (state->has_headphones)
            msp_write_dsp(client, 0x0006, val);
      if (!state->has_sound_processing)
            return;

      if (val)
            bal = (u8)((state->balance / 256) - 128);
      bass = ((state->bass - 32768) * 0x60 / 65535) << 8;
      treble = ((state->treble - 32768) * 0x60 / 65535) << 8;
      loudness = state->loudness ? ((5 * 4) << 8) : 0;

      v4l_dbg(1, msp_debug, client, "balance=%d bass=%d treble=%d loudness=%d\n",
            state->balance, state->bass, state->treble, state->loudness);

      msp_write_dsp(client, 0x0001, bal << 8);
      msp_write_dsp(client, 0x0002, bass);
      msp_write_dsp(client, 0x0003, treble);
      msp_write_dsp(client, 0x0004, loudness);
      if (!state->has_headphones)
            return;
      msp_write_dsp(client, 0x0030, bal << 8);
      msp_write_dsp(client, 0x0031, bass);
      msp_write_dsp(client, 0x0032, treble);
      msp_write_dsp(client, 0x0033, loudness);
}

/* ------------------------------------------------------------------------ */


static void msp_wake_thread(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);

      if (NULL == state->kthread)
            return;
      state->watch_stereo = 0;
      state->restart = 1;
      wake_up_interruptible(&state->wq);
}

int msp_sleep(struct msp_state *state, int timeout)
{
      DECLARE_WAITQUEUE(wait, current);

      add_wait_queue(&state->wq, &wait);
      if (!kthread_should_stop()) {
            if (timeout < 0) {
                  set_current_state(TASK_INTERRUPTIBLE);
                  schedule();
            } else {
                  schedule_timeout_interruptible
                                    (msecs_to_jiffies(timeout));
            }
      }

      remove_wait_queue(&state->wq, &wait);
      try_to_freeze();
      return state->restart;
}

/* ------------------------------------------------------------------------ */
#ifdef CONFIG_VIDEO_V4L1
static int msp_mode_v4l2_to_v4l1(int rxsubchans, int audmode)
{
      if (rxsubchans == V4L2_TUNER_SUB_MONO)
            return VIDEO_SOUND_MONO;
      if (rxsubchans == V4L2_TUNER_SUB_STEREO)
            return VIDEO_SOUND_STEREO;
      if (audmode == V4L2_TUNER_MODE_LANG2)
            return VIDEO_SOUND_LANG2;
      return VIDEO_SOUND_LANG1;
}

static int msp_mode_v4l1_to_v4l2(int mode)
{
      if (mode & VIDEO_SOUND_STEREO)
            return V4L2_TUNER_MODE_STEREO;
      if (mode & VIDEO_SOUND_LANG2)
            return V4L2_TUNER_MODE_LANG2;
      if (mode & VIDEO_SOUND_LANG1)
            return V4L2_TUNER_MODE_LANG1;
      return V4L2_TUNER_MODE_MONO;
}
#endif

static int msp_get_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
{
      struct msp_state *state = i2c_get_clientdata(client);

      switch (ctrl->id) {
      case V4L2_CID_AUDIO_VOLUME:
            ctrl->value = state->volume;
            break;

      case V4L2_CID_AUDIO_MUTE:
            ctrl->value = state->muted;
            break;

      case V4L2_CID_AUDIO_BALANCE:
            if (!state->has_sound_processing)
                  return -EINVAL;
            ctrl->value = state->balance;
            break;

      case V4L2_CID_AUDIO_BASS:
            if (!state->has_sound_processing)
                  return -EINVAL;
            ctrl->value = state->bass;
            break;

      case V4L2_CID_AUDIO_TREBLE:
            if (!state->has_sound_processing)
                  return -EINVAL;
            ctrl->value = state->treble;
            break;

      case V4L2_CID_AUDIO_LOUDNESS:
            if (!state->has_sound_processing)
                  return -EINVAL;
            ctrl->value = state->loudness;
            break;

      default:
            return -EINVAL;
      }
      return 0;
}

static int msp_set_ctrl(struct i2c_client *client, struct v4l2_control *ctrl)
{
      struct msp_state *state = i2c_get_clientdata(client);

      switch (ctrl->id) {
      case V4L2_CID_AUDIO_VOLUME:
            state->volume = ctrl->value;
            if (state->volume == 0)
                  state->balance = 32768;
            break;

      case V4L2_CID_AUDIO_MUTE:
            if (ctrl->value < 0 || ctrl->value >= 2)
                  return -ERANGE;
            state->muted = ctrl->value;
            break;

      case V4L2_CID_AUDIO_BASS:
            if (!state->has_sound_processing)
                  return -EINVAL;
            state->bass = ctrl->value;
            break;

      case V4L2_CID_AUDIO_TREBLE:
            if (!state->has_sound_processing)
                  return -EINVAL;
            state->treble = ctrl->value;
            break;

      case V4L2_CID_AUDIO_LOUDNESS:
            if (!state->has_sound_processing)
                  return -EINVAL;
            state->loudness = ctrl->value;
            break;

      case V4L2_CID_AUDIO_BALANCE:
            if (!state->has_sound_processing)
                  return -EINVAL;
            state->balance = ctrl->value;
            break;

      default:
            return -EINVAL;
      }
      msp_set_audio(client);
      return 0;
}

static int msp_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
      struct msp_state *state = i2c_get_clientdata(client);

      if (msp_debug >= 2)
            v4l_i2c_print_ioctl(client, cmd);

      switch (cmd) {
      case AUDC_SET_RADIO:
            if (state->radio)
                  return 0;
            state->radio = 1;
            v4l_dbg(1, msp_debug, client, "switching to radio mode\n");
            state->watch_stereo = 0;
            switch (state->opmode) {
            case OPMODE_MANUAL:
                  /* set msp3400 to FM radio mode */
                  msp3400c_set_mode(client, MSP_MODE_FM_RADIO);
                  msp3400c_set_carrier(client, MSP_CARRIER(10.7),
                                  MSP_CARRIER(10.7));
                  msp_set_audio(client);
                  break;
            case OPMODE_AUTODETECT:
            case OPMODE_AUTOSELECT:
                  /* the thread will do for us */
                  msp_wake_thread(client);
                  break;
            }
            break;

      /* --- v4l ioctls --- */
      /* take care: bttv does userspace copying, we'll get a
         kernel pointer here... */
#ifdef CONFIG_VIDEO_V4L1
      case VIDIOCGAUDIO:
      {
            struct video_audio *va = arg;

            va->flags |= VIDEO_AUDIO_VOLUME | VIDEO_AUDIO_MUTABLE;
            if (state->has_sound_processing)
                  va->flags |= VIDEO_AUDIO_BALANCE |
                        VIDEO_AUDIO_BASS |
                        VIDEO_AUDIO_TREBLE;
            if (state->muted)
                  va->flags |= VIDEO_AUDIO_MUTE;
            va->volume = state->volume;
            va->balance = state->volume ? state->balance : 32768;
            va->bass = state->bass;
            va->treble = state->treble;

            if (state->radio)
                  break;
            if (state->opmode == OPMODE_AUTOSELECT)
                  msp_detect_stereo(client);
            va->mode = msp_mode_v4l2_to_v4l1(state->rxsubchans, state->audmode);
            break;
      }

      case VIDIOCSAUDIO:
      {
            struct video_audio *va = arg;

            state->muted = (va->flags & VIDEO_AUDIO_MUTE);
            state->volume = va->volume;
            state->balance = va->balance;
            state->bass = va->bass;
            state->treble = va->treble;
            msp_set_audio(client);

            if (va->mode != 0 && state->radio == 0 &&
                state->audmode != msp_mode_v4l1_to_v4l2(va->mode)) {
                  state->audmode = msp_mode_v4l1_to_v4l2(va->mode);
                  msp_set_audmode(client);
            }
            break;
      }

      case VIDIOCSCHAN:
      {
            struct video_channel *vc = arg;
            int update = 0;
            v4l2_std_id std;

            if (state->radio)
                  update = 1;
            state->radio = 0;
            if (vc->norm == VIDEO_MODE_PAL)
                  std = V4L2_STD_PAL;
            else if (vc->norm == VIDEO_MODE_SECAM)
                  std = V4L2_STD_SECAM;
            else
                  std = V4L2_STD_NTSC;
            if (std != state->v4l2_std) {
                  state->v4l2_std = std;
                  update = 1;
            }
            if (update)
                  msp_wake_thread(client);
            break;
      }

      case VIDIOCSFREQ:
      {
            /* new channel -- kick audio carrier scan */
            msp_wake_thread(client);
            break;
      }
#endif
      case VIDIOC_S_FREQUENCY:
      {
            /* new channel -- kick audio carrier scan */
            msp_wake_thread(client);
            break;
      }

      /* --- v4l2 ioctls --- */
      case VIDIOC_S_STD:
      {
            v4l2_std_id *id = arg;
            int update = state->radio || state->v4l2_std != *id;

            state->v4l2_std = *id;
            state->radio = 0;
            if (update)
                  msp_wake_thread(client);
            return 0;
      }

      case VIDIOC_INT_G_AUDIO_ROUTING:
      {
            struct v4l2_routing *rt = arg;

            *rt = state->routing;
            break;
      }

      case VIDIOC_INT_S_AUDIO_ROUTING:
      {
            struct v4l2_routing *rt = arg;
            int tuner = (rt->input >> 3) & 1;
            int sc_in = rt->input & 0x7;
            int sc1_out = rt->output & 0xf;
            int sc2_out = (rt->output >> 4) & 0xf;
            u16 val, reg;
            int i;
            int extern_input = 1;

            if (state->routing.input == rt->input &&
                state->routing.output == rt->output)
                  break;
            state->routing = *rt;
            /* check if the tuner input is used */
            for (i = 0; i < 5; i++) {
                  if (((rt->input >> (4 + i * 4)) & 0xf) == 0)
                        extern_input = 0;
            }
            state->mode = extern_input ? MSP_MODE_EXTERN : MSP_MODE_AM_DETECT;
            state->rxsubchans = V4L2_TUNER_SUB_STEREO;
            msp_set_scart(client, sc_in, 0);
            msp_set_scart(client, sc1_out, 1);
            msp_set_scart(client, sc2_out, 2);
            msp_set_audmode(client);
            reg = (state->opmode == OPMODE_AUTOSELECT) ? 0x30 : 0xbb;
            val = msp_read_dem(client, reg);
            msp_write_dem(client, reg, (val & ~0x100) | (tuner << 8));
            /* wake thread when a new input is chosen */
            msp_wake_thread(client);
            break;
      }

      case VIDIOC_G_TUNER:
      {
            struct v4l2_tuner *vt = arg;

            if (state->radio)
                  break;
            if (state->opmode == OPMODE_AUTOSELECT)
                  msp_detect_stereo(client);
            vt->audmode    = state->audmode;
            vt->rxsubchans = state->rxsubchans;
            vt->capability |= V4L2_TUNER_CAP_STEREO |
                  V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
            break;
      }

      case VIDIOC_S_TUNER:
      {
            struct v4l2_tuner *vt = (struct v4l2_tuner *)arg;

            if (state->radio)  /* TODO: add mono/stereo support for radio */
                  break;
            if (state->audmode == vt->audmode)
                  break;
            state->audmode = vt->audmode;
            /* only set audmode */
            msp_set_audmode(client);
            break;
      }

      case VIDIOC_INT_I2S_CLOCK_FREQ:
      {
            u32 *a = (u32 *)arg;

            v4l_dbg(1, msp_debug, client, "Setting I2S speed to %d\n", *a);

            switch (*a) {
                  case 1024000:
                        state->i2s_mode = 0;
                        break;
                  case 2048000:
                        state->i2s_mode = 1;
                        break;
                  default:
                        return -EINVAL;
            }
            break;
      }

      case VIDIOC_QUERYCTRL:
      {
            struct v4l2_queryctrl *qc = arg;

            switch (qc->id) {
                  case V4L2_CID_AUDIO_VOLUME:
                  case V4L2_CID_AUDIO_MUTE:
                        return v4l2_ctrl_query_fill_std(qc);
                  default:
                        break;
            }
            if (!state->has_sound_processing)
                  return -EINVAL;
            switch (qc->id) {
                  case V4L2_CID_AUDIO_LOUDNESS:
                  case V4L2_CID_AUDIO_BALANCE:
                  case V4L2_CID_AUDIO_BASS:
                  case V4L2_CID_AUDIO_TREBLE:
                        return v4l2_ctrl_query_fill_std(qc);
                  default:
                        return -EINVAL;
            }
      }

      case VIDIOC_G_CTRL:
            return msp_get_ctrl(client, arg);

      case VIDIOC_S_CTRL:
            return msp_set_ctrl(client, arg);

      case VIDIOC_LOG_STATUS:
      {
            const char *p;

            if (state->opmode == OPMODE_AUTOSELECT)
                  msp_detect_stereo(client);
            v4l_info(client, "%s rev1 = 0x%04x rev2 = 0x%04x\n",
                        client->name, state->rev1, state->rev2);
            v4l_info(client, "Audio:    volume %d%s\n",
                        state->volume, state->muted ? " (muted)" : "");
            if (state->has_sound_processing) {
                  v4l_info(client, "Audio:    balance %d bass %d treble %d loudness %s\n",
                              state->balance, state->bass, state->treble,
                              state->loudness ? "on" : "off");
            }
            switch (state->mode) {
            case MSP_MODE_AM_DETECT: p = "AM (for carrier detect)"; break;
            case MSP_MODE_FM_RADIO: p = "FM Radio"; break;
            case MSP_MODE_FM_TERRA: p = "Terrestial FM-mono + FM-stereo"; break;
            case MSP_MODE_FM_SAT: p = "Satellite FM-mono"; break;
            case MSP_MODE_FM_NICAM1: p = "NICAM/FM (B/G, D/K)"; break;
            case MSP_MODE_FM_NICAM2: p = "NICAM/FM (I)"; break;
            case MSP_MODE_AM_NICAM: p = "NICAM/AM (L)"; break;
            case MSP_MODE_BTSC: p = "BTSC"; break;
            case MSP_MODE_EXTERN: p = "External input"; break;
            default: p = "unknown"; break;
            }
            if (state->mode == MSP_MODE_EXTERN) {
                  v4l_info(client, "Mode:     %s\n", p);
            } else if (state->opmode == OPMODE_MANUAL) {
                  v4l_info(client, "Mode:     %s (%s%s)\n", p,
                        (state->rxsubchans & V4L2_TUNER_SUB_STEREO) ? "stereo" : "mono",
                        (state->rxsubchans & V4L2_TUNER_SUB_LANG2) ? ", dual" : "");
            } else {
                  if (state->opmode == OPMODE_AUTODETECT)
                        v4l_info(client, "Mode:     %s\n", p);
                  v4l_info(client, "Standard: %s (%s%s)\n",
                        msp_standard_std_name(state->std),
                        (state->rxsubchans & V4L2_TUNER_SUB_STEREO) ? "stereo" : "mono",
                        (state->rxsubchans & V4L2_TUNER_SUB_LANG2) ? ", dual" : "");
            }
            v4l_info(client, "Audmode:  0x%04x\n", state->audmode);
            v4l_info(client, "Routing:  0x%08x (input) 0x%08x (output)\n",
                        state->routing.input, state->routing.output);
            v4l_info(client, "ACB:      0x%04x\n", state->acb);
            break;
      }

      case VIDIOC_G_CHIP_IDENT:
            return v4l2_chip_ident_i2c_client(client, arg, state->ident, (state->rev1 << 16) | state->rev2);

      default:
            /* unknown */
            return -EINVAL;
      }
      return 0;
}

static int msp_suspend(struct i2c_client *client, pm_message_t state)
{

      v4l_dbg(1, msp_debug, client, "suspend\n");
      msp_reset(client);
      return 0;
}

static int msp_resume(struct i2c_client *client)
{

      v4l_dbg(1, msp_debug, client, "resume\n");
      msp_wake_thread(client);
      return 0;
}

/* ----------------------------------------------------------------------- */

static struct i2c_driver i2c_driver;

static int msp_attach(struct i2c_adapter *adapter, int address, int kind)
{
      struct i2c_client *client;
      struct msp_state *state;
      int (*thread_func)(void *data) = NULL;
      int msp_hard;
      int msp_family;
      int msp_revision;
      int msp_product, msp_prod_hi, msp_prod_lo;
      int msp_rom;

      client = kzalloc(sizeof(*client), GFP_KERNEL);
      if (!client)
            return -ENOMEM;

      client->addr = address;
      client->adapter = adapter;
      client->driver = &i2c_driver;
      snprintf(client->name, sizeof(client->name) - 1, "msp3400");

      if (msp_reset(client) == -1) {
            v4l_dbg(1, msp_debug, client, "msp3400 not found\n");
            kfree(client);
            return 0;
      }

      state = kzalloc(sizeof(*state), GFP_KERNEL);
      if (!state) {
            kfree(client);
            return -ENOMEM;
      }

      i2c_set_clientdata(client, state);

      state->v4l2_std = V4L2_STD_NTSC;
      state->audmode = V4L2_TUNER_MODE_STEREO;
      state->volume = 58880;  /* 0db gain */
      state->balance = 32768; /* 0db gain */
      state->bass = 32768;
      state->treble = 32768;
      state->loudness = 0;
      state->input = -1;
      state->muted = 0;
      state->i2s_mode = 0;
      init_waitqueue_head(&state->wq);
      /* These are the reset input/output positions */
      state->routing.input = MSP_INPUT_DEFAULT;
      state->routing.output = MSP_OUTPUT_DEFAULT;

      state->rev1 = msp_read_dsp(client, 0x1e);
      if (state->rev1 != -1)
            state->rev2 = msp_read_dsp(client, 0x1f);
      v4l_dbg(1, msp_debug, client, "rev1=0x%04x, rev2=0x%04x\n", state->rev1, state->rev2);
      if (state->rev1 == -1 || (state->rev1 == 0 && state->rev2 == 0)) {
            v4l_dbg(1, msp_debug, client, "not an msp3400 (cannot read chip version)\n");
            kfree(state);
            kfree(client);
            return 0;
      }

      msp_set_audio(client);

      msp_family = ((state->rev1 >> 4) & 0x0f) + 3;
      msp_product = (state->rev2 >> 8) & 0xff;
      msp_prod_hi = msp_product / 10;
      msp_prod_lo = msp_product % 10;
      msp_revision = (state->rev1 & 0x0f) + '@';
      msp_hard = ((state->rev1 >> 8) & 0xff) + '@';
      msp_rom = state->rev2 & 0x1f;
      snprintf(client->name, sizeof(client->name), "MSP%d4%02d%c-%c%d",
                  msp_family, msp_product,
                  msp_revision, msp_hard, msp_rom);
      /* Rev B=2, C=3, D=4, G=7 */
      state->ident = msp_family * 10000 + 4000 + msp_product * 10 + msp_revision - '@';

      /* Has NICAM support: all mspx41x and mspx45x products have NICAM */
      state->has_nicam = msp_prod_hi == 1 || msp_prod_hi == 5;
      /* Has radio support: was added with revision G */
      state->has_radio = msp_revision >= 'G';
      /* Has headphones output: not for stripped down products */
      state->has_headphones = msp_prod_lo < 5;
      /* Has scart2 input: not in stripped down products of the '3' family */
      state->has_scart2 = msp_family >= 4 || msp_prod_lo < 7;
      /* Has scart3 input: not in stripped down products of the '3' family */
      state->has_scart3 = msp_family >= 4 || msp_prod_lo < 5;
      /* Has scart4 input: not in pre D revisions, not in stripped D revs */
      state->has_scart4 = msp_family >= 4 || (msp_revision >= 'D' && msp_prod_lo < 5);
      /* Has scart2 output: not in stripped down products of the '3' family */
      state->has_scart2_out = msp_family >= 4 || msp_prod_lo < 5;
      /* Has scart2 a volume control? Not in pre-D revisions. */
      state->has_scart2_out_volume = msp_revision > 'C' && state->has_scart2_out;
      /* Has a configurable i2s out? */
      state->has_i2s_conf = msp_revision >= 'G' && msp_prod_lo < 7;
      /* Has subwoofer output: not in pre-D revs and not in stripped down products */
      state->has_subwoofer = msp_revision >= 'D' && msp_prod_lo < 5;
      /* Has soundprocessing (bass/treble/balance/loudness/equalizer): not in
         stripped down products */
      state->has_sound_processing = msp_prod_lo < 7;
      /* Has Virtual Dolby Surround: only in msp34x1 */
      state->has_virtual_dolby_surround = msp_revision == 'G' && msp_prod_lo == 1;
      /* Has Virtual Dolby Surround & Dolby Pro Logic: only in msp34x2 */
      state->has_dolby_pro_logic = msp_revision == 'G' && msp_prod_lo == 2;
      /* The msp343xG supports BTSC only and cannot do Automatic Standard Detection. */
      state->force_btsc = msp_family == 3 && msp_revision == 'G' && msp_prod_hi == 3;

      state->opmode = opmode;
      if (state->opmode == OPMODE_AUTO) {
            /* MSP revision G and up have both autodetect and autoselect */
            if (msp_revision >= 'G')
                  state->opmode = OPMODE_AUTOSELECT;
            /* MSP revision D and up have autodetect */
            else if (msp_revision >= 'D')
                  state->opmode = OPMODE_AUTODETECT;
            else
                  state->opmode = OPMODE_MANUAL;
      }

      /* hello world :-) */
      v4l_info(client, "%s found @ 0x%x (%s)\n", client->name, address << 1, adapter->name);
      v4l_info(client, "%s ", client->name);
      if (state->has_nicam && state->has_radio)
            printk("supports nicam and radio, ");
      else if (state->has_nicam)
            printk("supports nicam, ");
      else if (state->has_radio)
            printk("supports radio, ");
      printk("mode is ");

      /* version-specific initialization */
      switch (state->opmode) {
      case OPMODE_MANUAL:
            printk("manual");
            thread_func = msp3400c_thread;
            break;
      case OPMODE_AUTODETECT:
            printk("autodetect");
            thread_func = msp3410d_thread;
            break;
      case OPMODE_AUTOSELECT:
            printk("autodetect and autoselect");
            thread_func = msp34xxg_thread;
            break;
      }
      printk("\n");

      /* startup control thread if needed */
      if (thread_func) {
            state->kthread = kthread_run(thread_func, client, "msp34xx");

            if (IS_ERR(state->kthread))
                  v4l_warn(client, "kernel_thread() failed\n");
            msp_wake_thread(client);
      }

      /* done */
      i2c_attach_client(client);

      return 0;
}

static int msp_probe(struct i2c_adapter *adapter)
{
      if (adapter->class & I2C_CLASS_TV_ANALOG)
            return i2c_probe(adapter, &addr_data, msp_attach);
      return 0;
}

static int msp_detach(struct i2c_client *client)
{
      struct msp_state *state = i2c_get_clientdata(client);
      int err;

      /* shutdown control thread */
      if (state->kthread) {
            state->restart = 1;
            kthread_stop(state->kthread);
      }
      msp_reset(client);

      err = i2c_detach_client(client);
      if (err) {
            return err;
      }

      kfree(state);
      kfree(client);
      return 0;
}

/* ----------------------------------------------------------------------- */

/* i2c implementation */
static struct i2c_driver i2c_driver = {
      .id             = I2C_DRIVERID_MSP3400,
      .attach_adapter = msp_probe,
      .detach_client  = msp_detach,
      .suspend = msp_suspend,
      .resume  = msp_resume,
      .command        = msp_command,
      .driver = {
            .name    = "msp3400",
      },
};

static int __init msp3400_init_module(void)
{
      return i2c_add_driver(&i2c_driver);
}

static void __exit msp3400_cleanup_module(void)
{
      i2c_del_driver(&i2c_driver);
}

module_init(msp3400_init_module);
module_exit(msp3400_cleanup_module);

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-basic-offset: 8
 * End:
 */

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