Fixed MTP to work with TWRP

drivers/media/pci/cx88/cx88-i2c.c

@@ -0,0 +1,183 @@
+
+/*
+
+    cx88-i2c.c  --  all the i2c code is here
+
+    Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
+			   & Marcus Metzler (mocm@thp.uni-koeln.de)
+    (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
+    (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
+
+    (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
+	- Multituner support and i2c address binding
+
+    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/init.h>
+
+#include <asm/io.h>
+
+#include "cx88.h"
+#include <media/v4l2-common.h>
+
+static unsigned int i2c_debug;
+module_param(i2c_debug, int, 0644);
+MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
+
+static unsigned int i2c_scan;
+module_param(i2c_scan, int, 0444);
+MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
+
+static unsigned int i2c_udelay = 5;
+module_param(i2c_udelay, int, 0644);
+MODULE_PARM_DESC(i2c_udelay,"i2c delay at insmod time, in usecs "
+		"(should be 5 or higher). Lower value means higher bus speed.");
+
+#define dprintk(level,fmt, arg...)	if (i2c_debug >= level) \
+	printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
+
+/* ----------------------------------------------------------------------- */
+
+static void cx8800_bit_setscl(void *data, int state)
+{
+	struct cx88_core *core = data;
+
+	if (state)
+		core->i2c_state |= 0x02;
+	else
+		core->i2c_state &= ~0x02;
+	cx_write(MO_I2C, core->i2c_state);
+	cx_read(MO_I2C);
+}
+
+static void cx8800_bit_setsda(void *data, int state)
+{
+	struct cx88_core *core = data;
+
+	if (state)
+		core->i2c_state |= 0x01;
+	else
+		core->i2c_state &= ~0x01;
+	cx_write(MO_I2C, core->i2c_state);
+	cx_read(MO_I2C);
+}
+
+static int cx8800_bit_getscl(void *data)
+{
+	struct cx88_core *core = data;
+	u32 state;
+
+	state = cx_read(MO_I2C);
+	return state & 0x02 ? 1 : 0;
+}
+
+static int cx8800_bit_getsda(void *data)
+{
+	struct cx88_core *core = data;
+	u32 state;
+
+	state = cx_read(MO_I2C);
+	return state & 0x01;
+}
+
+/* ----------------------------------------------------------------------- */
+
+static const struct i2c_algo_bit_data cx8800_i2c_algo_template = {
+	.setsda  = cx8800_bit_setsda,
+	.setscl  = cx8800_bit_setscl,
+	.getsda  = cx8800_bit_getsda,
+	.getscl  = cx8800_bit_getscl,
+	.udelay  = 16,
+	.timeout = 200,
+};
+
+/* ----------------------------------------------------------------------- */
+
+static const char * const i2c_devs[128] = {
+	[ 0x1c >> 1 ] = "lgdt330x",
+	[ 0x86 >> 1 ] = "tda9887/cx22702",
+	[ 0xa0 >> 1 ] = "eeprom",
+	[ 0xc0 >> 1 ] = "tuner (analog)",
+	[ 0xc2 >> 1 ] = "tuner (analog/dvb)",
+	[ 0xc8 >> 1 ] = "xc5000",
+};
+
+static void do_i2c_scan(const char *name, struct i2c_client *c)
+{
+	unsigned char buf;
+	int i,rc;
+
+	for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
+		c->addr = i;
+		rc = i2c_master_recv(c,&buf,0);
+		if (rc < 0)
+			continue;
+		printk("%s: i2c scan: found device @ 0x%x  [%s]\n",
+		       name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
+	}
+}
+
+/* init + register i2c adapter */
+int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
+{
+	/* Prevents usage of invalid delay values */
+	if (i2c_udelay<5)
+		i2c_udelay=5;
+
+	core->i2c_algo = cx8800_i2c_algo_template;
+
+
+	core->i2c_adap.dev.parent = &pci->dev;
+	strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
+	core->i2c_adap.owner = THIS_MODULE;
+	core->i2c_algo.udelay = i2c_udelay;
+	core->i2c_algo.data = core;
+	i2c_set_adapdata(&core->i2c_adap, &core->v4l2_dev);
+	core->i2c_adap.algo_data = &core->i2c_algo;
+	core->i2c_client.adapter = &core->i2c_adap;
+	strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);
+
+	cx8800_bit_setscl(core,1);
+	cx8800_bit_setsda(core,1);
+
+	core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
+	if (0 == core->i2c_rc) {
+		static u8 tuner_data[] =
+			{ 0x0b, 0xdc, 0x86, 0x52 };
+		static struct i2c_msg tuner_msg =
+			{ .flags = 0, .addr = 0xc2 >> 1, .buf = tuner_data, .len = 4 };
+
+		dprintk(1, "i2c register ok\n");
+		switch( core->boardnr ) {
+			case CX88_BOARD_HAUPPAUGE_HVR1300:
+			case CX88_BOARD_HAUPPAUGE_HVR3000:
+			case CX88_BOARD_HAUPPAUGE_HVR4000:
+				printk("%s: i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n",
+					core->name);
+				i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1);
+				break;
+			default:
+				break;
+		}
+		if (i2c_scan)
+			do_i2c_scan(core->name,&core->i2c_client);
+	} else
+		printk("%s: i2c register FAILED\n", core->name);
+
+	return core->i2c_rc;
+}