[deliverable/linux.git] / drivers / media / video / cx88 / cx88-vp3054-i2c.c

/*

    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 "cx88.h"
#include "cx88-vp3054-i2c.h"


/* ----------------------------------------------------------------------- */

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",
	.owner             = THIS_MODULE,
	.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));

	vp3054_i2c->adap.class |= I2C_CLASS_TV_DIGITAL;

	vp3054_i2c->adap.dev.parent = &dev->pci->dev;
	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);
Commit	Line	Data
fc40b261 CP	1	/*
	2
	3	cx88-vp3054-i2c.c -- support for the secondary I2C bus of the
	4	DNTV Live! DVB-T Pro (VP-3054), wired as:
	5	GPIO[0] -> SCL, GPIO[1] -> SDA
	6
	7	(c) 2005 Chris Pascoe <c.pascoe@itee.uq.edu.au>
	8
	9	This program is free software; you can redistribute it and/or modify
	10	it under the terms of the GNU General Public License as published by
	11	the Free Software Foundation; either version 2 of the License, or
	12	(at your option) any later version.
	13
	14	This program is distributed in the hope that it will be useful,
	15	but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	GNU General Public License for more details.
	18
	19	You should have received a copy of the GNU General Public License
	20	along with this program; if not, write to the Free Software
	21	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	22
	23	*/
	24
	25	#include <linux/module.h>
	26	#include <linux/moduleparam.h>
	27	#include <linux/init.h>
	28
	29	#include <asm/io.h>
	30
	31	#include "cx88.h"
	32	#include "cx88-vp3054-i2c.h"
	33
	34
	35	/* ----------------------------------------------------------------------- */
	36
	37	static void vp3054_bit_setscl(void *data, int state)
	38	{
	39	struct cx8802_dev *dev = data;
	40	struct cx88_core *core = dev->core;
	41	struct vp3054_i2c_state *vp3054_i2c = dev->card_priv;
	42
	43	if (state) {
	44	vp3054_i2c->state \|= 0x0001; /* SCL high */
	45	vp3054_i2c->state &= ~0x0100; /* external pullup */
	46	} else {
	47	vp3054_i2c->state &= ~0x0001; /* SCL low */
	48	vp3054_i2c->state \|= 0x0100; /* drive pin */
	49	}
	50	cx_write(MO_GP0_IO, 0x010000 \| vp3054_i2c->state);
	51	cx_read(MO_GP0_IO);
	52	}
	53
	54	static void vp3054_bit_setsda(void *data, int state)
	55	{
	56	struct cx8802_dev *dev = data;
	57	struct cx88_core *core = dev->core;
	58	struct vp3054_i2c_state *vp3054_i2c = dev->card_priv;
	59
	60	if (state) {
	61	vp3054_i2c->state \|= 0x0002; /* SDA high */
	62	vp3054_i2c->state &= ~0x0200; /* tristate pin */
	63	} else {
	64	vp3054_i2c->state &= ~0x0002; /* SDA low */
65	vp3054_i2c->state \|= 0x0200; /* drive pin */
66	}
67	cx_write(MO_GP0_IO, 0x020000 \| vp3054_i2c->state);
68	cx_read(MO_GP0_IO);
69	}
70
71	static int vp3054_bit_getscl(void *data)
72	{
73	struct cx8802_dev *dev = data;
74	struct cx88_core *core = dev->core;
75	u32 state;
76
77	state = cx_read(MO_GP0_IO);
78	return (state & 0x01) ? 1 : 0;
79	}
80
81	static int vp3054_bit_getsda(void *data)
82	{
83	struct cx8802_dev *dev = data;
84	struct cx88_core *core = dev->core;
85	u32 state;
86
87	state = cx_read(MO_GP0_IO);
88	return (state & 0x02) ? 1 : 0;
89	}
90
91	/* ----------------------------------------------------------------------- */
92
93	static struct i2c_algo_bit_data vp3054_i2c_algo_template = {
94	.setsda = vp3054_bit_setsda,
95	.setscl = vp3054_bit_setscl,
96	.getsda = vp3054_bit_getsda,
97	.getscl = vp3054_bit_getscl,
98	.udelay = 16,
99	.mdelay = 10,
100	.timeout = 200,
101	};
102
103	/* ----------------------------------------------------------------------- */
104
105	static struct i2c_adapter vp3054_i2c_adap_template = {
106	.name = "cx2388x",
107	.owner = THIS_MODULE,
108	.id = I2C_HW_B_CX2388x,
109	};
110
111	static struct i2c_client vp3054_i2c_client_template = {
112	.name = "VP-3054",
113	};
114
115	int vp3054_i2c_probe(struct cx8802_dev *dev)
116	{
117	struct cx88_core *core = dev->core;
118	struct vp3054_i2c_state *vp3054_i2c;
119	int rc;
120
121	if (core->board != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)
122	return 0;
123
124	dev->card_priv = kzalloc(sizeof(*vp3054_i2c), GFP_KERNEL);
125	if (dev->card_priv == NULL)
126	return -ENOMEM;
127	vp3054_i2c = dev->card_priv;
128
129	memcpy(&vp3054_i2c->adap, &vp3054_i2c_adap_template,
130	sizeof(vp3054_i2c->adap));
131	memcpy(&vp3054_i2c->algo, &vp3054_i2c_algo_template,
132	sizeof(vp3054_i2c->algo));
133	memcpy(&vp3054_i2c->client, &vp3054_i2c_client_template,
134	sizeof(vp3054_i2c->client));
135
136	vp3054_i2c->adap.class \|= I2C_CLASS_TV_DIGITAL;
137
138	vp3054_i2c->adap.dev.parent = &dev->pci->dev;
139	strlcpy(vp3054_i2c->adap.name, core->name,
140	sizeof(vp3054_i2c->adap.name));
141	vp3054_i2c->algo.data = dev;
142	i2c_set_adapdata(&vp3054_i2c->adap, dev);
143	vp3054_i2c->adap.algo_data = &vp3054_i2c->algo;
144	vp3054_i2c->client.adapter = &vp3054_i2c->adap;
145
146	vp3054_bit_setscl(dev,1);
147	vp3054_bit_setsda(dev,1);
148
149	rc = i2c_bit_add_bus(&vp3054_i2c->adap);
150	if (0 != rc) {
151	printk("%s: vp3054_i2c register FAILED\n", core->name);
152
153	kfree(dev->card_priv);
154	dev->card_priv = NULL;
155	}
156
157	return rc;
158	}
159
160	void vp3054_i2c_remove(struct cx8802_dev *dev)
161	{
162	struct vp3054_i2c_state *vp3054_i2c = dev->card_priv;
163
164	if (vp3054_i2c == NULL \|\|
165	dev->core->board != CX88_BOARD_DNTV_LIVE_DVB_T_PRO)
166	return;
167
168	i2c_bit_del_bus(&vp3054_i2c->adap);
169	kfree(vp3054_i2c);
170	}
171
172	EXPORT_SYMBOL(vp3054_i2c_probe);
173	EXPORT_SYMBOL(vp3054_i2c_remove);