V4L/DVB (6486): m52790: add new Mitsubishi A/V switch i2c driver
Hans Verkuil [Tue, 30 Oct 2007 08:41:25 +0000 (05:41 -0300)]
This driver is used by the ASUS Falcon2 cx23416-based cards.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/Kconfig
drivers/media/video/Makefile
drivers/media/video/m52790.c [new file with mode: 0644]
include/media/m52790.h [new file with mode: 0644]
include/media/v4l2-chip-ident.h

index ea5be37..320f9e0 100644 (file)
@@ -119,6 +119,15 @@ config VIDEO_CS53L32A
          To compile this driver as a module, choose M here: the
          module will be called cs53l32a.
 
+config VIDEO_M52790
+       tristate "Mitsubishi M52790 A/V switch"
+       depends on VIDEO_V4L2 && I2C && EXPERIMENTAL
+       ---help---
+        Support for the Mitsubishi M52790 A/V switch.
+
+        To compile this driver as a module, choose M here: the
+        module will be called m52790.
+
 config VIDEO_TLV320AIC23B
        tristate "Texas Instruments TLV320AIC23B audio codec"
        depends on VIDEO_V4L2 && I2C && EXPERIMENTAL
index 8a27818..d8910d8 100644 (file)
@@ -67,6 +67,7 @@ obj-$(CONFIG_VIDEO_TVP5150) += tvp5150.o
 obj-$(CONFIG_VIDEO_PVRUSB2) += pvrusb2/
 obj-$(CONFIG_VIDEO_MSP3400) += msp3400.o
 obj-$(CONFIG_VIDEO_CS53L32A) += cs53l32a.o
+obj-$(CONFIG_VIDEO_M52790) += m52790.o
 obj-$(CONFIG_VIDEO_TLV320AIC23B) += tlv320aic23b.o
 obj-$(CONFIG_VIDEO_WM8775) += wm8775.o
 obj-$(CONFIG_VIDEO_WM8739) += wm8739.o
diff --git a/drivers/media/video/m52790.c b/drivers/media/video/m52790.c
new file mode 100644 (file)
index 0000000..51ecbfb
--- /dev/null
@@ -0,0 +1,172 @@
+/*
+ * m52790 i2c ivtv driver.
+ * Copyright (C) 2007  Hans Verkuil
+ *
+ * A/V source switching Mitsubishi M52790SP/FP
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/ioctl.h>
+#include <asm/uaccess.h>
+#include <linux/i2c.h>
+#include <linux/i2c-id.h>
+#include <linux/videodev.h>
+#include <media/m52790.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-chip-ident.h>
+#include <media/v4l2-i2c-drv-legacy.h>
+
+MODULE_DESCRIPTION("i2c device driver for m52790 A/V switch");
+MODULE_AUTHOR("Hans Verkuil");
+MODULE_LICENSE("GPL");
+
+static unsigned short normal_i2c[] = { 0x90 >> 1, I2C_CLIENT_END };
+
+
+I2C_CLIENT_INSMOD;
+
+struct m52790_state {
+       u16 input;
+       u16 output;
+};
+
+/* ----------------------------------------------------------------------- */
+
+static int m52790_write(struct i2c_client *client)
+{
+       struct m52790_state *state = i2c_get_clientdata(client);
+       u8 sw1 = (state->input | state->output) & 0xff;
+       u8 sw2 = (state->input | state->output) >> 8;
+
+       return i2c_smbus_write_byte_data(client, sw1, sw2);
+}
+
+static int m52790_command(struct i2c_client *client, unsigned int cmd,
+                           void *arg)
+{
+       struct m52790_state *state = i2c_get_clientdata(client);
+       struct v4l2_routing *route = arg;
+
+       /* Note: audio and video are linked and cannot be switched separately.
+          So audio and video routing commands are identical for this chip.
+          In theory the video amplifier and audio modes could be handled
+          separately for the output, but that seems to be overkill right now.
+          The same holds for implementing an audio mute control, this is now
+          part of the audio output routing. The normal case is that another
+          chip takes care of the actual muting so making it part of the
+          output routing seems to be the right thing to do for now. */
+       switch (cmd) {
+       case VIDIOC_INT_G_AUDIO_ROUTING:
+       case VIDIOC_INT_G_VIDEO_ROUTING:
+               route->input = state->input;
+               route->output = state->output;
+               break;
+
+       case VIDIOC_INT_S_AUDIO_ROUTING:
+       case VIDIOC_INT_S_VIDEO_ROUTING:
+               state->input = route->input;
+               state->output = route->output;
+               m52790_write(client);
+               break;
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+       case VIDIOC_DBG_G_REGISTER:
+       case VIDIOC_DBG_S_REGISTER:
+       {
+               struct v4l2_register *reg = arg;
+
+               if (!v4l2_chip_match_i2c_client(client,
+                                       reg->match_type, reg->match_chip))
+                       return -EINVAL;
+               if (!capable(CAP_SYS_ADMIN))
+                       return -EPERM;
+               if (reg->reg != 0)
+                       return -EINVAL;
+               if (cmd == VIDIOC_DBG_G_REGISTER)
+                       reg->val = state->input | state->output;
+               else {
+                       state->input = reg->val & 0x0303;
+                       state->output = reg->val & ~0x0303;
+                       m52790_write(client);
+               }
+               break;
+       }
+#endif
+
+       case VIDIOC_G_CHIP_IDENT:
+               return v4l2_chip_ident_i2c_client(client, arg,
+                               V4L2_IDENT_M52790, 0);
+
+       case VIDIOC_LOG_STATUS:
+               v4l_info(client, "Switch 1: %02x\n",
+                               (state->input | state->output) & 0xff);
+               v4l_info(client, "Switch 2: %02x\n",
+                               (state->input | state->output) >> 8);
+               break;
+
+       default:
+               return -EINVAL;
+       }
+       return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+/* i2c implementation */
+
+static int m52790_probe(struct i2c_client *client)
+{
+       struct m52790_state *state;
+
+       /* Check if the adapter supports the needed features */
+       if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+               return -EIO;
+
+       snprintf(client->name, sizeof(client->name) - 1, "m52790");
+
+       v4l_info(client, "chip found @ 0x%x (%s)\n",
+                       client->addr << 1, client->adapter->name);
+
+       state = kmalloc(sizeof(struct m52790_state), GFP_KERNEL);
+       if (state == NULL)
+               return -ENOMEM;
+
+       state->input = M52790_IN_TUNER;
+       state->output = M52790_OUT_STEREO;
+       i2c_set_clientdata(client, state);
+       m52790_write(client);
+       return 0;
+}
+
+static int m52790_remove(struct i2c_client *client)
+{
+       kfree(i2c_get_clientdata(client));
+       return 0;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static struct v4l2_i2c_driver_data v4l2_i2c_data = {
+       .name = "m52790",
+       .driverid = I2C_DRIVERID_M52790,
+       .command = m52790_command,
+       .probe = m52790_probe,
+       .remove = m52790_remove,
+};
+
diff --git a/include/media/m52790.h b/include/media/m52790.h
new file mode 100644 (file)
index 0000000..7ddffae
--- /dev/null
@@ -0,0 +1,93 @@
+/*
+    m52790.h - definition for m52790 inputs and outputs
+
+    Copyright (C) 2007 Hans Verkuil (hverkuil@xs4all.nl)
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef _M52790_H_
+#define _M52790_H_
+
+/* Input routing switch 1 */
+
+#define M52790_SW1_IN_MASK     0x0003
+#define M52790_SW1_IN_TUNER    0x0000
+#define M52790_SW1_IN_V2       0x0001
+#define M52790_SW1_IN_V3       0x0002
+#define M52790_SW1_IN_V4       0x0003
+
+/* Selects component input instead of composite */
+#define M52790_SW1_YCMIX       0x0004
+
+
+/* Input routing switch 2 */
+
+#define M52790_SW2_IN_MASK     0x0300
+#define M52790_SW2_IN_TUNER    0x0000
+#define M52790_SW2_IN_V2       0x0100
+#define M52790_SW2_IN_V3       0x0200
+#define M52790_SW2_IN_V4       0x0300
+
+/* Selects component input instead of composite */
+#define M52790_SW2_YCMIX       0x0400
+
+
+/* Output routing switch 1 */
+
+/* Enable 6dB amplifier for composite out */
+#define M52790_SW1_V_AMP       0x0008
+
+/* Enable 6dB amplifier for component out */
+#define M52790_SW1_YC_AMP      0x0010
+
+/* Audio output mode */
+#define M52790_SW1_AUDIO_MASK  0x00c0
+#define M52790_SW1_AUDIO_MUTE  0x0000
+#define M52790_SW1_AUDIO_R     0x0040
+#define M52790_SW1_AUDIO_L     0x0080
+#define M52790_SW1_AUDIO_STEREO 0x00c0
+
+
+/* Output routing switch 2 */
+
+/* Enable 6dB amplifier for composite out */
+#define M52790_SW2_V_AMP       0x0800
+
+/* Enable 6dB amplifier for component out */
+#define M52790_SW2_YC_AMP      0x1000
+
+/* Audio output mode */
+#define M52790_SW2_AUDIO_MASK  0xc000
+#define M52790_SW2_AUDIO_MUTE  0x0000
+#define M52790_SW2_AUDIO_R     0x4000
+#define M52790_SW2_AUDIO_L     0x8000
+#define M52790_SW2_AUDIO_STEREO 0xc000
+
+
+/* Common values */
+#define M52790_IN_TUNER (M52790_SW1_IN_TUNER | M52790_SW2_IN_TUNER)
+#define M52790_IN_V2    (M52790_SW1_IN_V2 | M52790_SW2_IN_V2)
+#define M52790_IN_V3    (M52790_SW1_IN_V3 | M52790_SW2_IN_V3)
+#define M52790_IN_V4    (M52790_SW1_IN_V4 | M52790_SW2_IN_V4)
+
+#define M52790_OUT_STEREO      (M52790_SW1_AUDIO_STEREO | \
+                                M52790_SW2_AUDIO_STEREO)
+#define M52790_OUT_AMP_STEREO  (M52790_SW1_AUDIO_STEREO | \
+                                M52790_SW1_V_AMP | \
+                                M52790_SW2_AUDIO_STEREO | \
+                                M52790_SW2_V_AMP)
+
+#endif
index 8ae42c4..2442c28 100644 (file)
@@ -83,6 +83,9 @@ enum {
        /* module upd64083: just ident 64083 */
        V4L2_IDENT_UPD64083 = 64083,
 
+       /* module m52790: just ident 52790 */
+       V4L2_IDENT_M52790 = 52790,
+
        /* module msp34xx: reserved range 34000-34999 */
        V4L2_IDENT_MSP3400B = 34002,
        V4L2_IDENT_MSP3410B = 34102,