V4L/DVB (10758): cx18: Convert I2C devices to v4l2_subdevices

This is a major perturbation to cx18 I2C device handling to convert it to the
v4l2_device/subdeivce framework.  This change breaks GPIO audio multiplexer
control for the time being.  It will be fixed in a coming change.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 59 insertions, 19 deletions

diff --git a/drivers/media/video/cx18/cx18-ioctl.c b/drivers/media/video/cx18/cx18-ioctl.c
index 0ddf4dd55308..13ebd4a70f0d 100644
--- a/drivers/media/video/cx18/cx18-ioctl.c
+++ b/drivers/media/video/cx18/cx18-ioctl.c
@@ -372,15 +372,52 @@ static int cx18_g_chip_ident(struct file *file, void *fh,
                                 struct v4l2_dbg_chip_ident *chip)
 {
         struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        int err = 0;
 
         chip->ident = V4L2_IDENT_NONE;
         chip->revision = 0;
-        if (v4l2_chip_match_host(&chip->match)) {
-                chip->ident = V4L2_IDENT_CX23418;
-                return 0;
+        switch (chip->match.type) {
+        case V4L2_CHIP_MATCH_HOST:
+                switch (chip->match.addr) {
+                case 0:
+                        chip->ident = V4L2_IDENT_CX23418;
+                        chip->revision = cx18_read_reg(cx, 0xC72028);
+                        break;
+                case 1:
+                        /*
+                         * The A/V decoder is always present, but in the rare
+                         * case that the card doesn't have analog, we don't
+                         * use it.  We find it w/o using the cx->sd_av pointer
+                         */
+                        cx18_call_hw(cx, CX18_HW_418_AV,
+                                     core, g_chip_ident, chip);
+                        break;
+                default:
+                        /*
+                         * Could return ident = V4L2_IDENT_UNKNOWN if we had
+                         * other host chips at higher addresses, but we don't
+                         */
+                        err = -EINVAL; /* per V4L2 spec */
+                        break;
+                }
+                break;
+        case V4L2_CHIP_MATCH_I2C_DRIVER:
+                /* If needed, returns V4L2_IDENT_AMBIGUOUS without extra work */
+                cx18_call_all(cx, core, g_chip_ident, chip);
+                break;
+        case V4L2_CHIP_MATCH_I2C_ADDR:
+                /*
+                 * We could return V4L2_IDENT_UNKNOWN, but we don't do the work
+                 * to look if a chip is at the address with no driver.  That's a
+                 * dangerous thing to do with EEPROMs anyway.
+                 */
+                cx18_call_all(cx, core, g_chip_ident, chip);
+                break;
+        default:
+                err = -EINVAL;
+                break;
         }
-        cx18_call_i2c_clients(cx, VIDIOC_DBG_G_CHIP_IDENT, chip);
-        return 0;
+        return err;
 }
 
 #ifdef CONFIG_VIDEO_ADV_DEBUG
@@ -394,10 +431,10 @@ static int cx18_cxc(struct cx18 *cx, unsigned int cmd, void *arg)
                 return -EINVAL;
 
         regs->size = 4;
-        if (cmd == VIDIOC_DBG_G_REGISTER)
-                regs->val = cx18_read_enc(cx, regs->reg);
-        else
+        if (cmd == VIDIOC_DBG_S_REGISTER)
                 cx18_write_enc(cx, regs->val, regs->reg);
+        else
+                regs->val = cx18_read_enc(cx, regs->reg);
         return 0;
 }
 
@@ -408,7 +445,8 @@ static int cx18_g_register(struct file *file, void *fh,
 
         if (v4l2_chip_match_host(&reg->match))
                 return cx18_cxc(cx, VIDIOC_DBG_G_REGISTER, reg);
-        cx18_call_i2c_clients(cx, VIDIOC_DBG_G_REGISTER, reg);
+        /* FIXME - errors shouldn't be ignored */
+        cx18_call_all(cx, core, g_register, reg);
         return 0;
 }
 
@@ -419,7 +457,8 @@ static int cx18_s_register(struct file *file, void *fh,
 
         if (v4l2_chip_match_host(&reg->match))
                 return cx18_cxc(cx, VIDIOC_DBG_S_REGISTER, reg);
-        cx18_call_i2c_clients(cx, VIDIOC_DBG_S_REGISTER, reg);
+        /* FIXME - errors shouldn't be ignored */
+        cx18_call_all(cx, core, s_register, reg);
         return 0;
 }
 #endif
@@ -598,7 +637,7 @@ static int cx18_g_frequency(struct file *file, void *fh,
         if (vf->tuner != 0)
                 return -EINVAL;
 
-        cx18_call_i2c_clients(cx, VIDIOC_G_FREQUENCY, vf);
+        cx18_call_all(cx, tuner, g_frequency, vf);
         return 0;
 }
 
@@ -617,7 +656,7 @@ int cx18_s_frequency(struct file *file, void *fh, struct v4l2_frequency *vf)
 
         cx18_mute(cx);
         CX18_DEBUG_INFO("v4l2 ioctl: set frequency %d\n", vf->frequency);
-        cx18_call_i2c_clients(cx, VIDIOC_S_FREQUENCY, vf);
+        cx18_call_all(cx, tuner, s_frequency, vf);
         cx18_unmute(cx);
         return 0;
 }
@@ -666,7 +705,7 @@ int cx18_s_std(struct file *file, void *fh, v4l2_std_id *std)
                         (unsigned long long) cx->std);
 
         /* Tuner */
-        cx18_call_i2c_clients(cx, VIDIOC_S_STD, &cx->std);
+        cx18_call_all(cx, tuner, s_std, cx->std);
         return 0;
 }
 
@@ -683,9 +722,7 @@ static int cx18_s_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
         if (vt->index != 0)
                 return -EINVAL;
 
-        /* Setting tuner can only set audio mode */
-        cx18_call_i2c_clients(cx, VIDIOC_S_TUNER, vt);
-
+        cx18_call_all(cx, tuner, s_tuner, vt);
         return 0;
 }
 
@@ -696,7 +733,7 @@ static int cx18_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
         if (vt->index != 0)
                 return -EINVAL;
 
-        cx18_call_i2c_clients(cx, VIDIOC_G_TUNER, vt);
+        cx18_call_all(cx, tuner, g_tuner, vt);
 
         if (test_bit(CX18_F_I_RADIO_USER, &cx->i_flags)) {
                 strlcpy(vt->name, "cx18 Radio Tuner", sizeof(vt->name));
@@ -853,7 +890,7 @@ static int cx18_log_status(struct file *file, void *fh)
 
                 cx18_read_eeprom(cx, &tv);
         }
-        cx18_call_i2c_clients(cx, VIDIOC_LOG_STATUS, NULL);
+        cx18_call_all(cx, core, log_status);
         cx18_get_input(cx, cx->active_input, &vidin);
         cx18_get_audio_input(cx, cx->audio_input, &audin);
         CX18_INFO("Video Input: %s\n", vidin.name);
@@ -894,7 +931,8 @@ static long cx18_default(struct file *file, void *fh, int cmd, void *arg)
 
                 CX18_DEBUG_IOCTL("VIDIOC_INT_S_AUDIO_ROUTING(%d, %d)\n",
                         route->input, route->output);
-                cx18_audio_set_route(cx, route);
+                cx18_call_hw(cx, cx->card->hw_audio_ctrl, audio, s_routing,
+                             route);
                 break;
         }
 
@@ -922,6 +960,8 @@ long cx18_v4l2_ioctl(struct file *filp, unsigned int cmd,
 
         mutex_lock(&cx->serialize_lock);
 
+        /* FIXME - consolidate v4l2_prio_check()'s here */
+
         if (cx18_debug & CX18_DBGFLG_IOCTL)
                 vfd->debug = V4L2_DEBUG_IOCTL | V4L2_DEBUG_IOCTL_ARG;
         res = video_ioctl2(filp, cmd, arg);