[linux-2.6-block.git] / 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);
}

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

	return cx23885_gpio_get(dev, line);
}

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);
	}
}

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;
}

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) {
		printk(KERN_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;
}

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);
}
Commit	Line	Data
09ea33e5 IL	1	/*
	2	* Driver for Silicon Labs C8051F300 microcontroller.
	3	*
	4	* It is used for LNB power control in TeVii S470,
	5	* TBS 6920 PCIe DVB-S2 cards.
	6	*
	7	* Microcontroller connected to cx23885 GPIO pins:
	8	* GPIO0 - data - P0.3 F300
	9	* GPIO1 - reset - P0.2 F300
	10	* GPIO2 - clk - P0.1 F300
	11	* GPIO3 - busy - P0.0 F300
	12	*
	13	* Copyright (C) 2009 Igor M. Liplianin <liplianin@me.by>
	14	*
	15	* This program is free software; you can redistribute it and/or modify
	16	* it under the terms of the GNU General Public License as published by
	17	* the Free Software Foundation; either version 2 of the License, or
	18	* (at your option) any later version.
	19	*
	20	* This program is distributed in the hope that it will be useful,
	21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	23	*
	24	* GNU General Public License for more details.
09ea33e5 IL	25	*/
	26
	27	#include "cx23885.h"
ada73eee	28	#include "cx23885-f300.h"
09ea33e5 IL	29
	30	#define F300_DATA GPIO_0
	31	#define F300_RESET GPIO_1
	32	#define F300_CLK GPIO_2
	33	#define F300_BUSY GPIO_3
	34
	35	static void f300_set_line(struct cx23885_dev *dev, u32 line, u8 lvl)
	36	{
	37	cx23885_gpio_enable(dev, line, 1);
	38	if (lvl == 1)
	39	cx23885_gpio_set(dev, line);
	40	else
	41	cx23885_gpio_clear(dev, line);
	42	}
	43
	44	static u8 f300_get_line(struct cx23885_dev *dev, u32 line)
	45	{
	46	cx23885_gpio_enable(dev, line, 0);
	47
	48	return cx23885_gpio_get(dev, line);
	49	}
	50
	51	static void f300_send_byte(struct cx23885_dev *dev, u8 dta)
	52	{
	53	u8 i;
	54
	55	for (i = 0; i < 8; i++) {
	56	f300_set_line(dev, F300_CLK, 0);
	57	udelay(30);
	58	f300_set_line(dev, F300_DATA, (dta & 0x80) >> 7);/* msb first */
	59	udelay(30);
	60	dta <<= 1;
	61	f300_set_line(dev, F300_CLK, 1);
	62	udelay(30);
	63	}
	64	}
	65
	66	static u8 f300_get_byte(struct cx23885_dev *dev)
	67	{
	68	u8 i, dta = 0;
	69
	70	for (i = 0; i < 8; i++) {
	71	f300_set_line(dev, F300_CLK, 0);
	72	udelay(30);
	73	dta <<= 1;
	74	f300_set_line(dev, F300_CLK, 1);
	75	udelay(30);
	76	dta \|= f300_get_line(dev, F300_DATA);/* msb first */
	77
	78	}
	79
	80	return dta;
	81	}
	82
	83	static u8 f300_xfer(struct dvb_frontend fe, u8 buf)
	84	{
	85	struct cx23885_tsport *port = fe->dvb->priv;
	86	struct cx23885_dev *dev = port->dev;
	87	u8 i, temp, ret = 0;
	88
	89	temp = buf[0];
	90	for (i = 0; i < buf[0]; i++)
	91	temp += buf[i + 1];
	92	temp = (~temp + 1);/* get check sum */
93	buf[1 + buf[0]] = temp;
94
95	f300_set_line(dev, F300_RESET, 1);
96	f300_set_line(dev, F300_CLK, 1);
97	udelay(30);
98	f300_set_line(dev, F300_DATA, 1);
99	msleep(1);
100
101	/* question: */
102	f300_set_line(dev, F300_RESET, 0);/* begin to send data */
103	msleep(1);
104
105	f300_send_byte(dev, 0xe0);/* the slave address is 0xe0, write */
106	msleep(1);
107
108	temp = buf[0];
109	temp += 2;
110	for (i = 0; i < temp; i++)
111	f300_send_byte(dev, buf[i]);
112
113	f300_set_line(dev, F300_RESET, 1);/* sent data over */
114	f300_set_line(dev, F300_DATA, 1);
115
116	/* answer: */
117	temp = 0;
118	for (i = 0; ((i < 8) & (temp == 0)); i++) {
119	msleep(1);
120	if (f300_get_line(dev, F300_BUSY) == 0)
121	temp = 1;
122	}
123
124	if (i > 7) {
125	printk(KERN_ERR "%s: timeout, the slave no response\n",
126	__func__);
127	ret = 1; /* timeout, the slave no response */
128	} else { /* the slave not busy, prepare for getting data */
129	f300_set_line(dev, F300_RESET, 0);/ready.../
130	msleep(1);
131	f300_send_byte(dev, 0xe1);/* 0xe1 is Read */
132	msleep(1);
133	temp = f300_get_byte(dev);/get the data length /
134	if (temp > 14)
135	temp = 14;
136
137	for (i = 0; i < (temp + 1); i++)
138	f300_get_byte(dev);/* get data to empty buffer */
139
140	f300_set_line(dev, F300_RESET, 1);/* received data over */
141	f300_set_line(dev, F300_DATA, 1);
142	}
143
144	return ret;
145	}
146
0df289a2	147	int f300_set_voltage(struct dvb_frontend *fe, enum fe_sec_voltage voltage)
09ea33e5 IL	148	{
	149	u8 buf[16];
	150
	151	buf[0] = 0x05;
	152	buf[1] = 0x38;/* write port */
	153	buf[2] = 0x01;/* A port, lnb power */
	154
	155	switch (voltage) {
	156	case SEC_VOLTAGE_13:
	157	buf[3] = 0x01;/* power on */
	158	buf[4] = 0x02;/* B port, H/V */
	159	buf[5] = 0x00;/13V v/
	160	break;
	161	case SEC_VOLTAGE_18:
	162	buf[3] = 0x01;
	163	buf[4] = 0x02;
	164	buf[5] = 0x01;/* 18V h*/
	165	break;
	166	case SEC_VOLTAGE_OFF:
	167	buf[3] = 0x00;/* power off */
	168	buf[4] = 0x00;
	169	buf[5] = 0x00;
	170	break;
	171	}
	172
	173	return f300_xfer(fe, buf);
	174	}