[mirror_ubuntu-artful-kernel.git] / drivers / media / pci / ngene / ngene-i2c.c

/*
 * ngene-i2c.c: nGene PCIe bridge driver i2c functions
 *
 * Copyright (C) 2005-2007 Micronas
 *
 * Copyright (C) 2008-2009 Ralph Metzler <rjkm@metzlerbros.de>
 *                         Modifications for new nGene firmware,
 *                         support for EEPROM-copying,
 *                         support for new dual DVB-S2 card prototype
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 only, as published by the Free Software Foundation.
 *
 *
 * 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.
 *
 * To obtain the license, point your browser to
 * http://www.gnu.org/copyleft/gpl.html
 */

/* FIXME - some of these can probably be removed */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/io.h>
#include <asm/div64.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
#include <linux/timer.h>
#include <linux/byteorder/generic.h>
#include <linux/firmware.h>
#include <linux/vmalloc.h>

#include "ngene.h"

/* Firmware command for i2c operations */
static int ngene_command_i2c_read(struct ngene *dev, u8 adr,
			   u8 *out, u8 outlen, u8 *in, u8 inlen, int flag)
{
	struct ngene_command com;

	com.cmd.hdr.Opcode = CMD_I2C_READ;
	com.cmd.hdr.Length = outlen + 3;
	com.cmd.I2CRead.Device = adr << 1;
	memcpy(com.cmd.I2CRead.Data, out, outlen);
	com.cmd.I2CRead.Data[outlen] = inlen;
	com.cmd.I2CRead.Data[outlen + 1] = 0;
	com.in_len = outlen + 3;
	com.out_len = inlen + 1;

	if (ngene_command(dev, &com) < 0)
		return -EIO;

	if ((com.cmd.raw8[0] >> 1) != adr)
		return -EIO;

	if (flag)
		memcpy(in, com.cmd.raw8, inlen + 1);
	else
		memcpy(in, com.cmd.raw8 + 1, inlen);
	return 0;
}

static int ngene_command_i2c_write(struct ngene *dev, u8 adr,
				   u8 *out, u8 outlen)
{
	struct ngene_command com;


	com.cmd.hdr.Opcode = CMD_I2C_WRITE;
	com.cmd.hdr.Length = outlen + 1;
	com.cmd.I2CRead.Device = adr << 1;
	memcpy(com.cmd.I2CRead.Data, out, outlen);
	com.in_len = outlen + 1;
	com.out_len = 1;

	if (ngene_command(dev, &com) < 0)
		return -EIO;

	if (com.cmd.raw8[0] == 1)
		return -EIO;

	return 0;
}

static void ngene_i2c_set_bus(struct ngene *dev, int bus)
{
	if (!(dev->card_info->i2c_access & 2))
		return;
	if (dev->i2c_current_bus == bus)
		return;

	switch (bus) {
	case 0:
		ngene_command_gpio_set(dev, 3, 0);
		ngene_command_gpio_set(dev, 2, 1);
		break;

	case 1:
		ngene_command_gpio_set(dev, 2, 0);
		ngene_command_gpio_set(dev, 3, 1);
		break;
	}
	dev->i2c_current_bus = bus;
}

static int ngene_i2c_master_xfer(struct i2c_adapter *adapter,
				 struct i2c_msg msg[], int num)
{
	struct ngene_channel *chan =
		(struct ngene_channel *)i2c_get_adapdata(adapter);
	struct ngene *dev = chan->dev;

	down(&dev->i2c_switch_mutex);
	ngene_i2c_set_bus(dev, chan->number);

	if (num == 2 && msg[1].flags & I2C_M_RD && !(msg[0].flags & I2C_M_RD))
		if (!ngene_command_i2c_read(dev, msg[0].addr,
					    msg[0].buf, msg[0].len,
					    msg[1].buf, msg[1].len, 0))
			goto done;

	if (num == 1 && !(msg[0].flags & I2C_M_RD))
		if (!ngene_command_i2c_write(dev, msg[0].addr,
					     msg[0].buf, msg[0].len))
			goto done;
	if (num == 1 && (msg[0].flags & I2C_M_RD))
		if (!ngene_command_i2c_read(dev, msg[0].addr, NULL, 0,
					    msg[0].buf, msg[0].len, 0))
			goto done;

	up(&dev->i2c_switch_mutex);
	return -EIO;

done:
	up(&dev->i2c_switch_mutex);
	return num;
}


static u32 ngene_i2c_functionality(struct i2c_adapter *adap)
{
	return I2C_FUNC_SMBUS_EMUL;
}

static struct i2c_algorithm ngene_i2c_algo = {
	.master_xfer = ngene_i2c_master_xfer,
	.functionality = ngene_i2c_functionality,
};

int ngene_i2c_init(struct ngene *dev, int dev_nr)
{
	struct i2c_adapter *adap = &(dev->channel[dev_nr].i2c_adapter);

	i2c_set_adapdata(adap, &(dev->channel[dev_nr]));

	strcpy(adap->name, "nGene");

	adap->algo = &ngene_i2c_algo;
	adap->algo_data = (void *)&(dev->channel[dev_nr]);
	adap->dev.parent = &dev->pci_dev->dev;

	return i2c_add_adapter(adap);
}
Commit	Line	Data
cb1c0f8e DH	1	/*
	2	* ngene-i2c.c: nGene PCIe bridge driver i2c functions
	3	*
	4	* Copyright (C) 2005-2007 Micronas
	5	*
	6	* Copyright (C) 2008-2009 Ralph Metzler <rjkm@metzlerbros.de>
	7	* Modifications for new nGene firmware,
	8	* support for EEPROM-copying,
	9	* support for new dual DVB-S2 card prototype
	10	*
	11	*
	12	* This program is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU General Public License
	14	* version 2 only, as published by the Free Software Foundation.
	15	*
	16	*
	17	* This program is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	* GNU General Public License for more details.
	21	*
bcb63314 SA	22	* To obtain the license, point your browser to
bcb63314 SA	23	* http://www.gnu.org/copyleft/gpl.html
cb1c0f8e DH	24	*/
	25
	26	/* FIXME - some of these can probably be removed */
	27	#include <linux/module.h>
	28	#include <linux/init.h>
	29	#include <linux/delay.h>
	30	#include <linux/slab.h>
	31	#include <linux/poll.h>
	32	#include <linux/io.h>
	33	#include <asm/div64.h>
	34	#include <linux/pci.h>
	35	#include <linux/pci_ids.h>
cb1c0f8e	36	#include <linux/timer.h>
cb1c0f8e DH	37	#include <linux/byteorder/generic.h>
	38	#include <linux/firmware.h>
	39	#include <linux/vmalloc.h>
	40
	41	#include "ngene.h"
	42
	43	/* Firmware command for i2c operations */
	44	static int ngene_command_i2c_read(struct ngene *dev, u8 adr,
	45	u8 out, u8 outlen, u8 in, u8 inlen, int flag)
	46	{
	47	struct ngene_command com;
	48
	49	com.cmd.hdr.Opcode = CMD_I2C_READ;
	50	com.cmd.hdr.Length = outlen + 3;
	51	com.cmd.I2CRead.Device = adr << 1;
	52	memcpy(com.cmd.I2CRead.Data, out, outlen);
	53	com.cmd.I2CRead.Data[outlen] = inlen;
	54	com.cmd.I2CRead.Data[outlen + 1] = 0;
	55	com.in_len = outlen + 3;
	56	com.out_len = inlen + 1;
	57
	58	if (ngene_command(dev, &com) < 0)
	59	return -EIO;
	60
	61	if ((com.cmd.raw8[0] >> 1) != adr)
	62	return -EIO;
	63
	64	if (flag)
	65	memcpy(in, com.cmd.raw8, inlen + 1);
	66	else
	67	memcpy(in, com.cmd.raw8 + 1, inlen);
	68	return 0;
	69	}
	70
	71	static int ngene_command_i2c_write(struct ngene *dev, u8 adr,
	72	u8 *out, u8 outlen)
	73	{
	74	struct ngene_command com;
	75
	76
	77	com.cmd.hdr.Opcode = CMD_I2C_WRITE;
	78	com.cmd.hdr.Length = outlen + 1;
	79	com.cmd.I2CRead.Device = adr << 1;
	80	memcpy(com.cmd.I2CRead.Data, out, outlen);
	81	com.in_len = outlen + 1;
	82	com.out_len = 1;
	83
	84	if (ngene_command(dev, &com) < 0)
	85	return -EIO;
	86
	87	if (com.cmd.raw8[0] == 1)
	88	return -EIO;
	89
	90	return 0;
	91	}
	92
	93	static void ngene_i2c_set_bus(struct ngene *dev, int bus)
	94	{
	95	if (!(dev->card_info->i2c_access & 2))
	96	return;
	97	if (dev->i2c_current_bus == bus)
	98	return;
	99
	100	switch (bus) {
101	case 0:
102	ngene_command_gpio_set(dev, 3, 0);
103	ngene_command_gpio_set(dev, 2, 1);
104	break;
105
106	case 1:
107	ngene_command_gpio_set(dev, 2, 0);
108	ngene_command_gpio_set(dev, 3, 1);
109	break;
110	}
111	dev->i2c_current_bus = bus;
112	}
113
114	static int ngene_i2c_master_xfer(struct i2c_adapter *adapter,
115	struct i2c_msg msg[], int num)
116	{
117	struct ngene_channel *chan =
118	(struct ngene_channel *)i2c_get_adapdata(adapter);
119	struct ngene *dev = chan->dev;
120
121	down(&dev->i2c_switch_mutex);
122	ngene_i2c_set_bus(dev, chan->number);
123
124	if (num == 2 && msg[1].flags & I2C_M_RD && !(msg[0].flags & I2C_M_RD))
125	if (!ngene_command_i2c_read(dev, msg[0].addr,
126	msg[0].buf, msg[0].len,
127	msg[1].buf, msg[1].len, 0))
128	goto done;
129
130	if (num == 1 && !(msg[0].flags & I2C_M_RD))
131	if (!ngene_command_i2c_write(dev, msg[0].addr,
132	msg[0].buf, msg[0].len))
133	goto done;
134	if (num == 1 && (msg[0].flags & I2C_M_RD))
135	if (!ngene_command_i2c_read(dev, msg[0].addr, NULL, 0,
136	msg[0].buf, msg[0].len, 0))
137	goto done;
138
139	up(&dev->i2c_switch_mutex);
140	return -EIO;
141
142	done:
143	up(&dev->i2c_switch_mutex);
144	return num;
145	}
146
147
148	static u32 ngene_i2c_functionality(struct i2c_adapter *adap)
149	{
150	return I2C_FUNC_SMBUS_EMUL;
151	}
152
153	static struct i2c_algorithm ngene_i2c_algo = {
154	.master_xfer = ngene_i2c_master_xfer,
155	.functionality = ngene_i2c_functionality,
156	};
157
158	int ngene_i2c_init(struct ngene *dev, int dev_nr)
159	{
160	struct i2c_adapter *adap = &(dev->channel[dev_nr].i2c_adapter);
161
162	i2c_set_adapdata(adap, &(dev->channel[dev_nr]));
cb1c0f8e DH	163
	164	strcpy(adap->name, "nGene");
	165
	166	adap->algo = &ngene_i2c_algo;
	167	adap->algo_data = (void *)&(dev->channel[dev_nr]);
	168	adap->dev.parent = &dev->pci_dev->dev;
	169
	170	return i2c_add_adapter(adap);
	171	}
	172