path: root/drivers/media/pci/bt8xx/dvb-bt8xx.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Bt8xx based DVB adapter driver
 *
 * Copyright (C) 2002,2003 Florian Schirmer <jolt@tuxbox.org>
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/bitops.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/i2c.h>

#include <media/dmxdev.h>
#include <media/dvbdev.h>
#include <media/dvb_demux.h>
#include <media/dvb_frontend.h>
#include "dvb-bt8xx.h"
#include "bt878.h"

static int debug;

module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define dprintk(fmt, arg...) do {				\
	if (debug)						\
		printk(KERN_DEBUG pr_fmt("%s: " fmt),		\
		       __func__, ##arg);			\
} while (0)


#define IF_FREQUENCYx6 217    /* 6 * 36.16666666667MHz */

static void dvb_bt8xx_work(struct work_struct *t)
{
	struct bt878 *bt = from_work(bt, t, bh_work);
	struct dvb_bt8xx_card *card = dev_get_drvdata(&bt->adapter->dev);

	dprintk("%d\n", card->bt->finished_block);

	while (card->bt->last_block != card->bt->finished_block) {
		(card->bt->TS_Size ? dvb_dmx_swfilter_204 : dvb_dmx_swfilter)
			(&card->demux,
			 &card->bt->buf_cpu[card->bt->last_block *
					    card->bt->block_bytes],
			 card->bt->block_bytes);
		card->bt->last_block = (card->bt->last_block + 1) %
					card->bt->block_count;
	}
}

static int dvb_bt8xx_start_feed(struct dvb_demux_feed *dvbdmxfeed)
{
	struct dvb_demux*dvbdmx = dvbdmxfeed->demux;
	struct dvb_bt8xx_card *card = dvbdmx->priv;
	int rc;

	dprintk("dvb_bt8xx: start_feed\n");

	if (!dvbdmx->dmx.frontend)
		return -EINVAL;

	mutex_lock(&card->lock);
	card->nfeeds++;
	rc = card->nfeeds;
	if (card->nfeeds == 1)
		bt878_start(card->bt, card->gpio_mode,
			    card->op_sync_orin, card->irq_err_ignore);
	mutex_unlock(&card->lock);
	return rc;
}

static int dvb_bt8xx_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
	struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
	struct dvb_bt8xx_card *card = dvbdmx->priv;

	dprintk("dvb_bt8xx: stop_feed\n");

	if (!dvbdmx->dmx.frontend)
		return -EINVAL;

	mutex_lock(&card->lock);
	card->nfeeds--;
	if (card->nfeeds == 0)
		bt878_stop(card->bt);
	mutex_unlock(&card->lock);

	return 0;
}

static int is_pci_slot_eq(struct pci_dev* adev, struct pci_dev* bdev)
{
	if ((adev->subsystem_vendor == bdev->subsystem_vendor) &&
		(adev->subsystem_device == bdev->subsystem_device) &&
		(adev->bus->number == bdev->bus->number) &&
		(PCI_SLOT(adev->devfn) == PCI_SLOT(bdev->devfn)))
		return 1;
	return 0;
}

static struct bt878 *dvb_bt8xx_878_match(unsigned int bttv_nr,
					 struct pci_dev* bttv_pci_dev)
{
	unsigned int card_nr;

	/* Hmm, n squared. Hope n is small */
	for (card_nr = 0; card_nr < bt878_num; card_nr++)
		if (is_pci_slot_eq(bt878[card_nr].dev, bttv_pci_dev))
			return &bt878[card_nr];
	return NULL;
}

static int thomson_dtt7579_demod_init(struct dvb_frontend* fe)
{
	static u8 mt352_clock_config [] = { 0x89, 0x38, 0x38 };
	static u8 mt352_reset [] = { 0x50, 0x80 };
	static u8 mt352_adc_ctl_1_cfg [] = { 0x8E, 0x40 };
	static u8 mt352_agc_cfg [] = { 0x67, 0x28, 0x20 };
	static u8 mt352_gpp_ctl_cfg [] = { 0x8C, 0x33 };
	static u8 mt352_capt_range_cfg[] = { 0x75, 0x32 };

	mt352_write(fe, mt352_clock_config, sizeof(mt352_clock_config));
	udelay(2000);
	mt352_write(fe, mt352_reset, sizeof(mt352_reset));
	mt352_write(fe, mt352_adc_ctl_1_cfg, sizeof(mt352_adc_ctl_1_cfg));

	mt352_write(fe, mt352_agc_cfg, sizeof(mt352_agc_cfg));
	mt352_write(fe, mt352_gpp_ctl_cfg, sizeof(mt352_gpp_ctl_cfg));
	mt352_write(fe, mt352_capt_range_cfg, sizeof(mt352_capt_range_cfg));

	return 0;
}

static int thomson_dtt7579_tuner_calc_regs(struct dvb_frontend *fe, u8* pllbuf, int buf_len)
{
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	u32 div;
	unsigned char bs = 0;
	unsigned char cp = 0;

	if (buf_len < 5)
		return -EINVAL;

	div = (((c->frequency + 83333) * 3) / 500000) + IF_FREQUENCYx6;

	if (c->frequency < 542000000)
		cp = 0xb4;
	else if (c->frequency < 771000000)
		cp = 0xbc;
	else
		cp = 0xf4;

	if (c->frequency == 0)
		bs = 0x03;
	else if (c->frequency < 443250000)
		bs = 0x02;
	else
		bs = 0x08;

	pllbuf[0] = 0x60;
	pllbuf[1] = div >> 8;
	pllbuf[2] = div & 0xff;
	pllbuf[3] = cp;
	pllbuf[