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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/media/dvb/mantis/mantis_ioc.c
15112 views
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/*

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	Mantis PCI bridge driver

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	Copyright (C) Manu Abraham ([email protected])

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	This program is free software; you can redistribute it and/or modify

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	it under the terms of the GNU General Public License as published by

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	the Free Software Foundation; either version 2 of the License, or

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	(at your option) any later version.

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	This program is distributed in the hope that it will be useful,

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	but WITHOUT ANY WARRANTY; without even the implied warranty of

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	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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	GNU General Public License for more details.

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	You should have received a copy of the GNU General Public License

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	along with this program; if not, write to the Free Software

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	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

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*/

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#include <linux/kernel.h>

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#include <linux/i2c.h>

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#include <linux/signal.h>

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#include <linux/sched.h>

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#include <linux/interrupt.h>

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#include "dmxdev.h"

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#include "dvbdev.h"

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#include "dvb_demux.h"

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#include "dvb_frontend.h"

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#include "dvb_net.h"

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#include "mantis_common.h"

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#include "mantis_reg.h"

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#include "mantis_ioc.h"

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static int read_eeprom_bytes(struct mantis_pci *mantis, u8 reg, u8 *data, u8 length)

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{

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	struct i2c_adapter *adapter = &mantis->adapter;

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	int err;

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	u8 buf = reg;

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	struct i2c_msg msg[] = {

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		{ .addr = 0x50, .flags = 0, .buf = &buf, .len = 1 },

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		{ .addr = 0x50, .flags = I2C_M_RD, .buf = data, .len = length },

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	};

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	err = i2c_transfer(adapter, msg, 2);

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	if (err < 0) {

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		dprintk(MANTIS_ERROR, 1, "ERROR: i2c read: < err=%i d0=0x%02x d1=0x%02x >",

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			err, data[0], data[1]);

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		return err;

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	}

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	return 0;

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}

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int mantis_get_mac(struct mantis_pci *mantis)

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{

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	int err;

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	u8 mac_addr[6] = {0};

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	err = read_eeprom_bytes(mantis, 0x08, mac_addr, 6);

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	if (err < 0) {

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		dprintk(MANTIS_ERROR, 1, "ERROR: Mantis EEPROM read error <%d>", err);

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		return err;

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	}

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	dprintk(MANTIS_ERROR, 0, "    MAC Address=[%pM]\n", mac_addr);

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	return 0;

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}

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EXPORT_SYMBOL_GPL(mantis_get_mac);

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/* Turn the given bit on or off. */

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void mantis_gpio_set_bits(struct mantis_pci *mantis, u32 bitpos, u8 value)

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{

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	u32 cur;

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	dprintk(MANTIS_DEBUG, 1, "Set Bit <%d> to <%d>", bitpos, value);

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	cur = mmread(MANTIS_GPIF_ADDR);

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	if (value)

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		mantis->gpio_status = cur | (1 << bitpos);

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	else

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		mantis->gpio_status = cur & (~(1 << bitpos));

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	dprintk(MANTIS_DEBUG, 1, "GPIO Value <%02x>", mantis->gpio_status);

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	mmwrite(mantis->gpio_status, MANTIS_GPIF_ADDR);

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	mmwrite(0x00, MANTIS_GPIF_DOUT);

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}

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EXPORT_SYMBOL_GPL(mantis_gpio_set_bits);

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int mantis_stream_control(struct mantis_pci *mantis, enum mantis_stream_control stream_ctl)

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{

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	u32 reg;

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	reg = mmread(MANTIS_CONTROL);

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	switch (stream_ctl) {

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	case STREAM_TO_HIF:

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		dprintk(MANTIS_DEBUG, 1, "Set stream to HIF");

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		reg &= 0xff - MANTIS_BYPASS;

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		mmwrite(reg, MANTIS_CONTROL);

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		reg |= MANTIS_BYPASS;

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		mmwrite(reg, MANTIS_CONTROL);

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		break;

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	case STREAM_TO_CAM:

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		dprintk(MANTIS_DEBUG, 1, "Set stream to CAM");

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		reg |= MANTIS_BYPASS;

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		mmwrite(reg, MANTIS_CONTROL);

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		reg &= 0xff - MANTIS_BYPASS;

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		mmwrite(reg, MANTIS_CONTROL);

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		break;

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	default:

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		dprintk(MANTIS_ERROR, 1, "Unknown MODE <%02x>", stream_ctl);

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		return -1;

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	}

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	return 0;

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}

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EXPORT_SYMBOL_GPL(mantis_stream_control);

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