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path: root/drivers/media/video/zr36120_i2c.c
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Diffstat (limited to 'drivers/media/video/zr36120_i2c.c')
-rw-r--r--drivers/media/video/zr36120_i2c.c132
1 files changed, 132 insertions, 0 deletions
diff --git a/drivers/media/video/zr36120_i2c.c b/drivers/media/video/zr36120_i2c.c
new file mode 100644
index 00000000000..6bfe84d657f
--- /dev/null
+++ b/drivers/media/video/zr36120_i2c.c
@@ -0,0 +1,132 @@
+/*
+ zr36120_i2c.c - Zoran 36120/36125 based framegrabbers
+
+ Copyright (C) 1998-1999 Pauline Middelink <middelin@polyware.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.
+*/
+
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#include <linux/video_decoder.h>
+#include <asm/uaccess.h>
+
+#include "tuner.h"
+#include "zr36120.h"
+
+/* ----------------------------------------------------------------------- */
+/* I2C functions */
+/* ----------------------------------------------------------------------- */
+
+/* software I2C functions */
+
+#define I2C_DELAY 10
+
+static void i2c_setlines(struct i2c_bus *bus,int ctrl,int data)
+{
+ struct zoran *ztv = (struct zoran*)bus->data;
+ unsigned int b = 0;
+ if (data) b |= ztv->card->swapi2c ? ZORAN_I2C_SCL : ZORAN_I2C_SDA;
+ if (ctrl) b |= ztv->card->swapi2c ? ZORAN_I2C_SDA : ZORAN_I2C_SCL;
+ zrwrite(b, ZORAN_I2C);
+ udelay(I2C_DELAY);
+}
+
+static int i2c_getdataline(struct i2c_bus *bus)
+{
+ struct zoran *ztv = (struct zoran*)bus->data;
+ if (ztv->card->swapi2c)
+ return zrread(ZORAN_I2C) & ZORAN_I2C_SCL;
+ return zrread(ZORAN_I2C) & ZORAN_I2C_SDA;
+}
+
+static
+void attach_inform(struct i2c_bus *bus, int id)
+{
+ struct zoran *ztv = (struct zoran*)bus->data;
+ struct video_decoder_capability dc;
+ int rv;
+
+ switch (id) {
+ case I2C_DRIVERID_VIDEODECODER:
+ DEBUG(printk(CARD_INFO "decoder attached\n",CARD));
+
+ /* fetch the capabilites of the decoder */
+ rv = i2c_control_device(&ztv->i2c, I2C_DRIVERID_VIDEODECODER, DECODER_GET_CAPABILITIES, &dc);
+ if (rv) {
+ DEBUG(printk(CARD_DEBUG "decoder is not V4L aware!\n",CARD));
+ break;
+ }
+ DEBUG(printk(CARD_DEBUG "capabilities %d %d %d\n",CARD,dc.flags,dc.inputs,dc.outputs));
+
+ /* Test if the decoder can de VBI transfers */
+ if (dc.flags & 16 /*VIDEO_DECODER_VBI*/)
+ ztv->have_decoder = 2;
+ else
+ ztv->have_decoder = 1;
+ break;
+ case I2C_DRIVERID_TUNER:
+ ztv->have_tuner = 1;
+ DEBUG(printk(CARD_INFO "tuner attached\n",CARD));
+ if (ztv->tuner_type >= 0)
+ {
+ if (i2c_control_device(&ztv->i2c,I2C_DRIVERID_TUNER,TUNER_SET_TYPE,&ztv->tuner_type)<0)
+ DEBUG(printk(CARD_INFO "attach_inform; tuner won't be set to type %d\n",CARD,ztv->tuner_type));
+ }
+ break;
+ default:
+ DEBUG(printk(CARD_INFO "attach_inform; unknown device id=%d\n",CARD,id));
+ break;
+ }
+}
+
+static
+void detach_inform(struct i2c_bus *bus, int id)
+{
+ struct zoran *ztv = (struct zoran*)bus->data;
+
+ switch (id) {
+ case I2C_DRIVERID_VIDEODECODER:
+ ztv->have_decoder = 0;
+ DEBUG(printk(CARD_INFO "decoder detached\n",CARD));
+ break;
+ case I2C_DRIVERID_TUNER:
+ ztv->have_tuner = 0;
+ DEBUG(printk(CARD_INFO "tuner detached\n",CARD));
+ break;
+ default:
+ DEBUG(printk(CARD_INFO "detach_inform; unknown device id=%d\n",CARD,id));
+ break;
+ }
+}
+
+struct i2c_bus zoran_i2c_bus_template =
+{
+ "ZR36120",
+ I2C_BUSID_ZORAN,
+ NULL,
+
+ SPIN_LOCK_UNLOCKED,
+
+ attach_inform,
+ detach_inform,
+
+ i2c_setlines,
+ i2c_getdataline,
+ NULL,
+ NULL
+};