or51132.c

trident tm5600的linux驱动

/*
 *    Support for OR51132 (pcHDTV HD-3000) - VSB/QAM
 *
 *
 *    Copyright (C) 2007 Trent Piepho <[e-mail]>
 *
 *    Copyright (C) 2005 Kirk Lapray <[e-mail]>
 *
 *    Based on code from Jack Kelliher ([e-mail])
 *                           Copyright (C) 2002 & pcHDTV, inc.
 *
 *    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.
 *
 *    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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
*/

/*
 * This driver needs two external firmware files. Please copy
 * "dvb-fe-or51132-vsb.fw" and "dvb-fe-or51132-qam.fw" to
 * /usr/lib/hotplug/firmware/ or /lib/firmware/
 * (depending on configuration of firmware hotplug).
 */
#define OR51132_VSB_FIRMWARE "dvb-fe-or51132-vsb.fw"
#define OR51132_QAM_FIRMWARE "dvb-fe-or51132-qam.fw"

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <asm/byteorder.h>

#include "dvb_math.h"
#include "dvb_frontend.h"
#include "or51132.h"

static int debug;
#define dprintk(args...) \
	do { \
		if (debug) printk(KERN_DEBUG "or51132: " args); \
	} while (0)


struct or51132_state
{
	struct i2c_adapter* i2c;

	/* Configuration settings */
	const struct or51132_config* config;

	struct dvb_frontend frontend;

	/* Demodulator private data */
	fe_modulation_t current_modulation;
	u32 snr; /* Result of last SNR calculation */

	/* Tuner private data */
	u32 current_frequency;
};


/* Write buffer to demod */
static int or51132_writebuf(struct or51132_state *state, const u8 *buf, int len)
{
	int err;
	struct i2c_msg msg = { .addr = state->config->demod_address,
			       .flags = 0, .buf = (u8*)buf, .len = len };

	/* msleep(20); */ /* doesn't appear to be necessary */
	if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
		printk(KERN_WARNING "or51132: I2C write (addr 0x%02x len %d) error: %d\n",
		       msg.addr, msg.len, err);
		return -EREMOTEIO;
	}
	return 0;
}

/* Write constant bytes, e.g. or51132_writebytes(state, 0x04, 0x42, 0x00);
   Less code and more efficient that loading a buffer on the stack with
   the bytes to send and then calling or51132_writebuf() on that. */
#define or51132_writebytes(state, data...)  \
	({ static const u8 _data[] = {data}; \
	or51132_writebuf(state, _data, sizeof(_data)); })

/* Read data from demod into buffer.  Returns 0 on success. */
static int or51132_readbuf(struct or51132_state *state, u8 *buf, int len)
{
	int err;
	struct i2c_msg msg = { .addr = state->config->demod_address,
			       .flags = I2C_M_RD, .buf = buf, .len = len };

	/* msleep(20); */ /* doesn't appear to be necessary */
	if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
		printk(KERN_WARNING "or51132: I2C read (addr 0x%02x len %d) error: %d\n",
		       msg.addr, msg.len, err);
		return -EREMOTEIO;
	}
	return 0;
}

/* Reads a 16-bit demod register.  Returns <0 on error. */
static int or51132_readreg(struct or51132_state *state, u8 reg)
{
	u8 buf[2] = { 0x04, reg };
	struct i2c_msg msg[2] = {
		{.addr = state->config->demod_address, .flags = 0,
		 .buf = buf, .len = 2 },
		{.addr = state->config->demod_address, .flags = I2C_M_RD,
		 .buf = buf, .len = 2 }};
	int err;

	if ((err = i2c_transfer(state->i2c, msg, 2)) != 2) {
		printk(KERN_WARNING "or51132: I2C error reading register %d: %d\n",
		       reg, err);
		return -EREMOTEIO;
	}
	return buf[0] | (buf[1] << 8);
}

static int or51132_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
{
	struct or51132_state* state = fe->demodulator_priv;
	static const u8 run_buf[] = {0x7F,0x01};
	u8 rec_buf[8];
	u32 firmwareAsize, firmwareBsize;
	int i,ret;

	dprintk("Firmware is %Zd bytes\n",fw->size);

	/* Get size of firmware A and B */
	firmwareAsize = le32_to_cpu(*((__le32*)fw->data));
	dprintk("FirmwareA is %i bytes\n",firmwareAsize);
	firmwareBsize = le32_to_cpu(*((__le32*)(fw->data+4)));
	dprintk("FirmwareB is %i bytes\n",firmwareBsize);

	/* Upload firmware */
	if ((ret = or51132_writebuf(state, &fw->data[8], firmwareAsize))) {
		printk(KERN_WARNING "or51132: load_firmware error 1\n");
		return ret;
	}
	if ((ret = or51132_writebuf(state, &fw->data[8+firmwareAsize],
				    firmwareBsize))) {
		printk(KERN_WARNING "or51132: load_firmware error 2\n");
		return ret;
	}

	if ((ret = or51132_writebuf(state, run_buf, 2))) {
		printk(KERN_WARNING "or51132: load_firmware error 3\n");
		return ret;
	}
	if ((ret = or51132_writebuf(state, run_buf, 2))) {
		printk(KERN_WARNING "or51132: load_firmware error 4\n");
		return ret;
	}

	/* 50ms for operation to begin */
	msleep(50);

	/* Read back ucode version to besure we loaded correctly and are really up and running */
	/* Get uCode version */
	if ((ret = or51132_writebytes(state, 0x10, 0x10, 0x00))) {
		printk(KERN_WARNING "or51132: load_firmware error a\n");
		return ret;
	}
	if ((ret = or51132_writebytes(state, 0x04, 0x17))) {
		printk(KERN_WARNING "or51132: load_firmware error b\n");
		return ret;
	}
	if ((ret = or51132_writebytes(state, 0x00, 0x00))) {
		printk(KERN_WARNING "or51132: load_firmware error c\n");
		return ret;
	}
	for (i=0;i<4;i++) {
		/* Once upon a time, this command might have had something
		   to do with getting the firmware version, but it's
		   not used anymore:
		   {0x04,0x00,0x30,0x00,i+1} */
		/* Read 8 bytes, two bytes at a time */
		if ((ret = or51132_readbuf(state, &rec_buf[i*2], 2))) {
			printk(KERN_WARNING
			       "or51132: load_firmware error d - %d\n",i);
			return ret;
		}
	}

	printk(KERN_WARNING
	       "or51132: Version: %02X%02X%02X%02X-%02X%02X%02X%02X (%02X%01X-%01X-%02X%01X-%01X)\n",
	       rec_buf[1],rec_buf[0],rec_buf[3],rec_buf[2],
	       rec_buf[5],rec_buf[4],rec_buf[7],rec_buf[6],
	       rec_buf[3],rec_buf[2]>>4,rec_buf[2]&0x0f,
	       rec_buf[5],rec_buf[4]>>4,rec_buf[4]&0x0f);

	if ((ret = or51132_writebytes(state, 0x10, 0x00, 0x00))) {
		printk(KERN_WARNING "or51132: load_firmware error e\n");
		return ret;
	}
	return 0;
};

static int or51132_init(struct dvb_frontend* fe)
{
	return 0;
}

static int or51132_read_ber(struct dvb_frontend* fe, u32* ber)
{
	*ber = 0;
	return 0;
}

static int or51132_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
	*ucblocks = 0;
	return 0;
}

static int or51132_sleep(struct dvb_frontend* fe)
{
	return 0;
}

static int or51132_setmode(struct dvb_frontend* fe)
{
	struct or51132_state* state = fe->demodulator_priv;
	u8 cmd_buf1[3] = {0x04, 0x01, 0x5f};
	u8 cmd_buf2[3] = {0x1c, 0x00, 0 };

	dprintk("setmode %d\n",(int)state->current_modulation);

	switch (state->current_modulation) {
	case VSB_8:
		/* Auto CH, Auto NTSC rej, MPEGser, MPEG2tr, phase noise-high */
		cmd_buf1[2] = 0x50;
		/* REC MODE inv IF spectrum, Normal */
		cmd_buf2[1] = 0x03;
		/* Channel MODE ATSC/VSB8 */
		cmd_buf2[2] = 0x06;
		break;
	/* All QAM modes are:
	   Auto-deinterleave; MPEGser, MPEG2tr, phase noise-high
	   REC MODE Normal Carrier Lock */
	case QAM_AUTO:
		/* Channel MODE Auto QAM64/256 */
		cmd_buf2[2] = 0x4f;
		break;
	case QAM_256:
		/* Channel MODE QAM256 */
		cmd_buf2[2] = 0x45;
		break;
	case QAM_64:
		/* Channel MODE QAM64 */
		cmd_buf2[2] = 0x43;
		break;
	default:
		printk(KERN_WARNING
		       "or51132: setmode: Modulation set to unsupported value (%d)\n",
		       state->current_modulation);
		return -EINVAL;
	}

	/* Set Receiver 1 register */
	if (or51132_writebuf(state, cmd_buf1, 3)) {
		printk(KERN_WARNING "or51132: set_mode error 1\n");
		return -EREMOTEIO;
	}
	dprintk("set #1 to %02x\n", cmd_buf1[2]);

	/* Set operation mode in Receiver 6 register */
	if (or51132_writebuf(state, cmd_buf2, 3)) {
		printk(KERN_WARNING "or51132: set_mode error 2\n");
		return -EREMOTEIO;
	}
	dprintk("set #6 to 0x%02x%02x\n", cmd_buf2[1], cmd_buf2[2]);

	return 0;
}

/* Some modulations use the same firmware.  This classifies modulations
   by the firmware they use. */
#define MOD_FWCLASS_UNKNOWN	0
#define MOD_FWCLASS_VSB		1
#define MOD_FWCLASS_QAM		2
static int modulation_fw_class(fe_modulation_t modulation)
{
	switch(modulation) {
	case VSB_8:
		return MOD_FWCLASS_VSB;
	case QAM_AUTO:
	case QAM_64:
	case QAM_256:
		return MOD_FWCLASS_QAM;
	default:
		return MOD_FWCLASS_UNKNOWN;
	}
}

static int or51132_set_parameters(struct dvb_frontend* fe,
				  struct dvb_frontend_parameters *param)
{
	int ret;
	struct or51132_state* state = fe->demodulator_priv;