/*    cx88-vp3054-i2c.c  --  support for the secondary I2C bus of the			   DNTV Live! DVB-T Pro (VP-3054), wired as:			   GPIO[0] -> SCL, GPIO[1] -> SDA    (c) 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>    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/moduleparam.h>#include <linux/init.h>#include <asm/io.h>#include "compat.h"#include "cx88.h"#include "cx88-vp3054-i2c.h"#if LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0)#include "i2c-compat.h"#endifMODULE_DESCRIPTION("driver for cx2388x VP3054 design");MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");MODULE_LICENSE("GPL");/* ----------------------------------------------------------------------- */static void vp3054_bit_setscl(void *data, int state){	struct cx8802_dev *dev = data;	struct cx88_core *core = dev->core;	struct vp3054_i2c_state *vp3054_i2c = dev->card_priv;	if (state) {		vp3054_i2c->state |=  0x0001;	/* SCL high */		vp3054_i2c->state &= ~0x0100;	/* external pullup */	} else {		vp3054_i2c->state &= ~0x0001;	/* SCL low */		vp3054_i2c->state |=  0x0100;	/* drive pin */	}	cx_write(MO_GP0_IO, 0x010000 | vp3054_i2c->state);	cx_read(MO_GP0_IO);}static void vp3054_bit_setsda(void *data, int state){	struct cx8802_dev *dev = data;	struct cx88_core *core = dev->core;	struct vp3054_i2c_state *vp3054_i2c = dev->card_priv;	if (state) {		vp3054_i2c->state |=  0x0002;	/* SDA high */		vp3054_i2c->state &= ~0x0200;	/* tristate pin */	} else {		vp3054_i2c->state &= ~0x0002;	/* SDA low */		vp3054_i2c->state |=  0x0200;	/* drive pin */	}	cx_write(MO_GP0_IO, 0x020000 | vp3054_i2c->state);	cx_read(MO_GP0_IO);}static int vp3054_bit_getscl(void *data){	struct cx8802_dev *dev = data;	struct cx88_core *core = dev->core;	u32 state;	state = cx_read(MO_GP0_IO);	return (state & 0x01) ? 1 : 0;}static int vp3054_bit_getsda(void *data){	struct cx8802_dev *dev = data;	struct cx88_core *core = dev->core;	u32 state;	state = cx_read(MO_GP0_IO);	return (state & 0x02) ? 1 : 0;}/* ----------------------------------------------------------------------- */static struct i2c_algo_bit_data vp3054_i2c_algo_template = {	.setsda  = vp3054_bit_setsda,	.setscl  = vp3054_bit_setscl,	.getsda  = vp3054_bit_getsda,	.getscl  = vp3054_bit_getscl,	.udelay  = 16,	.mdelay  = 10,	.timeout = 200,};/* ----------------------------------------------------------------------- */static struct i2c_adapter vp3054_i2c_adap_template = {	.name              = "cx2388x",#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)	.owner             = THIS_MODULE,#endif	.id                = I2C_HW_B_CX2388x,};static struct i2c_client vp3054_i2c_client_template = {	.name	= "VP-3054",};int vp3054_i2c_probe(struct cx8802_dev *dev){	struct cx88_core *core = dev->core;	struct vp3054_i2c_state *vp3054_i2c;	int rc;	if (core->board != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)		return 0;	dev->card_priv = kzalloc(sizeof(*vp3054_i2c), GFP_KERNEL);	if (dev->card_priv == NULL)		return -ENOMEM;	vp3054_i2c = dev->card_priv;	memcpy(&vp3054_i2c->adap, &vp3054_i2c_adap_template,	       sizeof(vp3054_i2c->adap));	memcpy(&vp3054_i2c->algo, &vp3054_i2c_algo_template,	       sizeof(vp3054_i2c->algo));	memcpy(&vp3054_i2c->client, &vp3054_i2c_client_template,	       sizeof(vp3054_i2c->client));#ifdef I2C_CLASS_TV_DIGITAL	vp3054_i2c->adap.class |= I2C_CLASS_TV_DIGITAL;#endif#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,66)	vp3054_i2c->adap.dev.parent = &dev->pci->dev;#endif	strlcpy(vp3054_i2c->adap.name, core->name,		sizeof(vp3054_i2c->adap.name));	vp3054_i2c->algo.data = dev;	i2c_set_adapdata(&vp3054_i2c->adap, dev);	vp3054_i2c->adap.algo_data = &vp3054_i2c->algo;	vp3054_i2c->client.adapter = &vp3054_i2c->adap;	vp3054_bit_setscl(dev,1);	vp3054_bit_setsda(dev,1);	rc = i2c_bit_add_bus(&vp3054_i2c->adap);	if (0 != rc) {		printk("%s: vp3054_i2c register FAILED\n", core->name);		kfree(dev->card_priv);		dev->card_priv = NULL;	}	return rc;}void vp3054_i2c_remove(struct cx8802_dev *dev){	struct vp3054_i2c_state *vp3054_i2c = dev->card_priv;	if (vp3054_i2c == NULL ||	    dev->core->board != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)		return;	i2c_bit_del_bus(&vp3054_i2c->adap);	kfree(vp3054_i2c);}EXPORT_SYMBOL(vp3054_i2c_probe);EXPORT_SYMBOL(vp3054_i2c_remove);