patch-2.3.30 linux/drivers/char/zr36120_i2c.c

• Lines: 119
• Date: Sat Nov 27 15:27:48 1999
• Orig file: v2.3.29/linux/drivers/char/zr36120_i2c.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.29/linux/drivers/char/zr36120_i2c.c linux/drivers/char/zr36120_i2c.c
@@ -0,0 +1,118 @@
+/*
+    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/version.h>
+#include <asm/uaccess.h>
+
+#include "linux/video_decoder.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;
+
+	switch (id) {
+	 case I2C_DRIVERID_VIDEODECODER:
+		ztv->have_decoder = 1;
+		DEBUG(printk(KERN_INFO "%s: decoder attached\n",CARD));
+		break;
+	 case I2C_DRIVERID_TUNER:
+		ztv->have_tuner = 1;
+		DEBUG(printk(KERN_INFO "%s: 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(KERN_INFO "%s: attach_inform; tuner wont be set to type %d\n",CARD,ztv->tuner_type));
+		}
+		break;
+	 default:
+		DEBUG(printk(KERN_INFO "%s: 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(KERN_INFO "%s: decoder detached\n",CARD));
+		break;
+	 case I2C_DRIVERID_TUNER:
+		ztv->have_tuner = 0;
+		DEBUG(printk(KERN_INFO "%s: tuner detached\n",CARD));
+		break;
+	 default:
+		DEBUG(printk(KERN_INFO "%s: 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
+};