path: root/drivers/media/dvb/pt1/pt1.c

/*
 * driver for Earthsoft PT1
 *
 * Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info>
 *
 * based on pt1dvr - http://pt1dvr.sourceforge.jp/
 * 	by Tomoaki Ishikawa <tomy@users.sourceforge.jp>
 *
 * 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.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/pci.h>
#include <linux/kthread.h>
#include <linux/freezer.h>

#include "dvbdev.h"
#include "dvb_demux.h"
#include "dmxdev.h"
#include "dvb_net.h"
#include "dvb_frontend.h"

#include "va1j5jf8007t.h"
#include "va1j5jf8007s.h"

#define DRIVER_NAME "earth-pt1"

#define PT1_PAGE_SHIFT 12
#define PT1_PAGE_SIZE (1 << PT1_PAGE_SHIFT)
#define PT1_NR_UPACKETS 1024
#define PT1_NR_BUFS 511

struct pt1_buffer_page {
	__le32 upackets[PT1_NR_UPACKETS];
};

struct pt1_table_page {
	__le32 next_pfn;
	__le32 buf_pfns[PT1_NR_BUFS];
};

struct pt1_buffer {
	struct pt1_buffer_page *page;
	dma_addr_t addr;
};

struct pt1_table {
	struct pt1_table_page *page;
	dma_addr_t addr;
	struct pt1_buffer bufs[PT1_NR_BUFS];
};

#define PT1_NR_ADAPS 4

struct pt1_adapter;

struct pt1 {
	struct pci_dev *pdev;
	void __iomem *regs;
	struct i2c_adapter i2c_adap;
	int i2c_running;
	struct pt1_adapter *adaps[PT1_NR_ADAPS];
	struct pt1_table *tables;
	struct task_struct *kthread;
};

struct pt1_adapter {
	struct pt1 *pt1;
	int index;

	u8 *buf;
	int upacket_count;
	int packet_count;

	struct dvb_adapter adap;
	struct dvb_demux demux;
	int users;
	struct dmxdev dmxdev;
	struct dvb_net net;
	struct dvb_frontend *fe;
	int (*orig_set_voltage)(struct dvb_frontend *fe,
				fe_sec_voltage_t voltage);
};

#define pt1_printk(level, pt1, format, arg...)	\
	dev_printk(level, &(pt1)->pdev->dev, format, ##arg)

static void pt1_write_reg(struct pt1 *pt1, int reg, u32 data)
{
	writel(data, pt1->regs + reg * 4);
}

static u32 pt1_read_reg(struct pt1 *pt1, int reg)
{
	return readl(pt1->regs + reg * 4);
}

static int pt1_nr_tables = 64;
module_param_named(nr_tables, pt1_nr_tables, int, 0);

static void pt1_increment_table_count(struct pt1 *pt1)
{
	pt1_write_reg(pt1, 0, 0x00000020);
}

static void pt1_init_table_count(struct pt1 *pt1)
{
	pt1_write_reg(pt1, 0, 0x00000010);
}

static void pt1_register_tables(struct pt1 *pt1, u32 first_pfn)
{
	pt1_write_reg(pt1, 5, first_pfn);
	pt1_write_reg(pt1, 0, 0x0c000040);
}

static void pt1_unregister_tables(struct pt1 *pt1)
{
	pt1_write_reg(pt1, 0, 0x08080000);
}

static int pt1_sync(struct pt1 *pt1)
{
	int i;
	for (i = 0; i < 57; i++) {
		if (pt1_read_reg(pt1, 0) & 0x20000000)
			return 0;
		pt1_write_reg(pt1, 0, 0x00000008);
	}
	pt1_printk(KERN_ERR, pt1, "could not sync\n");
	return -EIO;
}

static u64 pt1_identify(struct pt1 *pt1)
{
	int i;
	u64 id;
	id = 0;
	for (i = 0; i < 57; i++) {
		id |= (u64)(pt1_read_reg(pt1, 0) >> 30 & 1) << i;
		pt1_write_reg(pt1, 0, 0x00000008);
	}
	return id;
}

static int