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Release 4.11 drivers/media/pci/cx23885/cx23885-f300.c

/*
 * Driver for Silicon Labs C8051F300 microcontroller.
 *
 * It is used for LNB power control in TeVii S470,
 * TBS 6920 PCIe DVB-S2 cards.
 *
 * Microcontroller connected to cx23885 GPIO pins:
 * GPIO0 - data         - P0.3 F300
 * GPIO1 - reset        - P0.2 F300
 * GPIO2 - clk          - P0.1 F300
 * GPIO3 - busy         - P0.0 F300
 *
 * Copyright (C) 2009 Igor M. Liplianin <liplianin@me.by>
 *
 * 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.
 */

#include "cx23885.h"
#include "cx23885-f300.h"


#define F300_DATA	GPIO_0

#define F300_RESET	GPIO_1

#define F300_CLK	GPIO_2

#define F300_BUSY	GPIO_3


static void f300_set_line(struct cx23885_dev *dev, u32 line, u8 lvl) { cx23885_gpio_enable(dev, line, 1); if (lvl == 1) cx23885_gpio_set(dev, line); else cx23885_gpio_clear(dev, line); }

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Igor M. Liplianin47100.00%1100.00%
Total47100.00%1100.00%


static u8 f300_get_line(struct cx23885_dev *dev, u32 line) { cx23885_gpio_enable(dev, line, 0); return cx23885_gpio_get(dev, line); }

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Igor M. Liplianin31100.00%1100.00%
Total31100.00%1100.00%


static void f300_send_byte(struct cx23885_dev *dev, u8 dta) { u8 i; for (i = 0; i < 8; i++) { f300_set_line(dev, F300_CLK, 0); udelay(30); f300_set_line(dev, F300_DATA, (dta & 0x80) >> 7);/* msb first */ udelay(30); dta <<= 1; f300_set_line(dev, F300_CLK, 1); udelay(30); } }

Contributors

PersonTokensPropCommitsCommitProp
Igor M. Liplianin85100.00%1100.00%
Total85100.00%1100.00%


static u8 f300_get_byte(struct cx23885_dev *dev) { u8 i, dta = 0; for (i = 0; i < 8; i++) { f300_set_line(dev, F300_CLK, 0); udelay(30); dta <<= 1; f300_set_line(dev, F300_CLK, 1); udelay(30); dta |= f300_get_line(dev, F300_DATA);/* msb first */ } return dta; }

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PersonTokensPropCommitsCommitProp
Igor M. Liplianin78100.00%1100.00%
Total78100.00%1100.00%


static u8 f300_xfer(struct dvb_frontend *fe, u8 *buf) { struct cx23885_tsport *port = fe->dvb->priv; struct cx23885_dev *dev = port->dev; u8 i, temp, ret = 0; temp = buf[0]; for (i = 0; i < buf[0]; i++) temp += buf[i + 1]; temp = (~temp + 1);/* get check sum */ buf[1 + buf[0]] = temp; f300_set_line(dev, F300_RESET, 1); f300_set_line(dev, F300_CLK, 1); udelay(30); f300_set_line(dev, F300_DATA, 1); msleep(1); /* question: */ f300_set_line(dev, F300_RESET, 0);/* begin to send data */ msleep(1); f300_send_byte(dev, 0xe0);/* the slave address is 0xe0, write */ msleep(1); temp = buf[0]; temp += 2; for (i = 0; i < temp; i++) f300_send_byte(dev, buf[i]); f300_set_line(dev, F300_RESET, 1);/* sent data over */ f300_set_line(dev, F300_DATA, 1); /* answer: */ temp = 0; for (i = 0; ((i < 8) & (temp == 0)); i++) { msleep(1); if (f300_get_line(dev, F300_BUSY) == 0) temp = 1; } if (i > 7) { pr_err("%s: timeout, the slave no response\n", __func__); ret = 1; /* timeout, the slave no response */ } else { /* the slave not busy, prepare for getting data */ f300_set_line(dev, F300_RESET, 0);/*ready...*/ msleep(1); f300_send_byte(dev, 0xe1);/* 0xe1 is Read */ msleep(1); temp = f300_get_byte(dev);/*get the data length */ if (temp > 14) temp = 14; for (i = 0; i < (temp + 1); i++) f300_get_byte(dev);/* get data to empty buffer */ f300_set_line(dev, F300_RESET, 1);/* received data over */ f300_set_line(dev, F300_DATA, 1); } return ret; }

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PersonTokensPropCommitsCommitProp
Igor M. Liplianin38199.74%150.00%
Mauro Carvalho Chehab10.26%150.00%
Total382100.00%2100.00%


int f300_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage voltage) { u8 buf[16]; buf[0] = 0x05; buf[1] = 0x38;/* write port */ buf[2] = 0x01;/* A port, lnb power */ switch (voltage) { case SEC_VOLTAGE_13: buf[3] = 0x01;/* power on */ buf[4] = 0x02;/* B port, H/V */ buf[5] = 0x00;/*13V v*/ break; case SEC_VOLTAGE_18: buf[3] = 0x01; buf[4] = 0x02; buf[5] = 0x01;/* 18V h*/ break; case SEC_VOLTAGE_OFF: buf[3] = 0x00;/* power off */ buf[4] = 0x00; buf[5] = 0x00; break; } return f300_xfer(fe, buf); }

Contributors

PersonTokensPropCommitsCommitProp
Igor M. Liplianin13598.54%150.00%
Mauro Carvalho Chehab21.46%150.00%
Total137100.00%2100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Igor M. Liplianin77699.11%120.00%
Mauro Carvalho Chehab60.77%360.00%
Hans Verkuil10.13%120.00%
Total783100.00%5100.00%
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