mirror of https://gitee.com/openkylin/linux.git
179 lines
4.5 KiB
C
179 lines
4.5 KiB
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.
|
|
*
|
|
*
|
|
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
* 02110-1301, USA
|
|
* Or, 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/smp_lock.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]));
|
|
adap->class = I2C_CLASS_TV_DIGITAL | I2C_CLASS_TV_ANALOG;
|
|
|
|
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);
|
|
}
|
|
|