drivers/media/pci/smipcie/smipcie.c

/*
 * SMI PCIe driver for DVBSky cards.
 *
 * Copyright (C) 2014 Max nibble <nibble.max@gmail.com>
 *
 *    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 "smipcie.h"
#include "m88ds3103.h"
#include "m88ts2022.h"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

static int smi_hw_init(struct smi_dev *dev)
{
	u32 port_mux, port_ctrl, int_stat;

	/* set port mux.*/
	port_mux = smi_read(MUX_MODE_CTRL);
	port_mux &= ~(rbPaMSMask);
	port_mux |= rbPaMSDtvNoGpio;
	port_mux &= ~(rbPbMSMask);
	port_mux |= rbPbMSDtvNoGpio;
	port_mux &= ~(0x0f0000);
	port_mux |= 0x50000;
	smi_write(MUX_MODE_CTRL, port_mux);

	/* set DTV register.*/
	/* Port A */
	port_ctrl = smi_read(VIDEO_CTRL_STATUS_A);
	port_ctrl &= ~0x01;
	smi_write(VIDEO_CTRL_STATUS_A, port_ctrl);
	port_ctrl = smi_read(MPEG2_CTRL_A);
	port_ctrl &= ~0x40;
	port_ctrl |= 0x80;
	smi_write(MPEG2_CTRL_A, port_ctrl);
	/* Port B */
	port_ctrl = smi_read(VIDEO_CTRL_STATUS_B);
	port_ctrl &= ~0x01;
	smi_write(VIDEO_CTRL_STATUS_B, port_ctrl);
	port_ctrl = smi_read(MPEG2_CTRL_B);
	port_ctrl &= ~0x40;
	port_ctrl |= 0x80;
	smi_write(MPEG2_CTRL_B, port_ctrl);

	/* disable and clear interrupt.*/
	smi_write(MSI_INT_ENA_CLR, ALL_INT);
	int_stat = smi_read(MSI_INT_STATUS);
	smi_write(MSI_INT_STATUS_CLR, int_stat);

	/* reset demod.*/
	smi_clear(PERIPHERAL_CTRL, 0x0303);
	msleep(50);
	smi_set(PERIPHERAL_CTRL, 0x0101);
	return 0;
}

/* i2c bit bus.*/
static void smi_i2c_cfg(struct smi_dev *dev, u32 sw_ctl)
{
	u32 dwCtrl;

	dwCtrl = smi_read(sw_ctl);
	dwCtrl &= ~0x18; /* disable output.*/
	dwCtrl |= 0x21; /* reset and software mode.*/
	dwCtrl &= ~0xff00;
	dwCtrl |= 0x6400;
	smi_write(sw_ctl, dwCtrl);
	msleep(20);
	dwCtrl = smi_read(sw_ctl);
	dwCtrl &= ~0x20;
	smi_write(sw_ctl, dwCtrl);
}

static void smi_i2c_setsda(struct smi_dev *dev, int state, u32 sw_ctl)
{
	if (state) {
		/* set as input.*/
		smi_clear(sw_ctl, SW_I2C_MSK_DAT_EN);
	} else {
		smi_clear(sw_ctl, SW_I2C_MSK_DAT_OUT);
		/* set as output.*/
		smi_set(sw_ctl, SW_I2C_MSK_DAT_EN);
	}
}

static void smi_i2c_setscl(void *data, int state, u32 sw_ctl)
{
	struct smi_dev *dev = data;

	if (state) {
		/* set as input.*/
		smi_clear(sw_ctl, SW_I2C_MSK_CLK_EN);
	} else {
		smi_clear(sw_ctl, SW_I2C_MSK_CLK_OUT);
		/* set as output.*/
		smi_set(sw_ctl, SW_I2C_MSK_CLK_EN);
	}
}

static int smi_i2c_getsda(void *data, u32 sw_ctl)
{
	struct smi_dev *dev = data;
	/* set as input.*/
	smi_clear(sw_ctl, SW_I2C_MSK_DAT_EN);
	udelay(1);
	return (smi_read(sw_ctl) & SW_I2C_MSK_DAT_IN) ? 1 : 0;
}

static int smi_i2c_getscl(void *data, u32 sw_ctl)
{
	struct smi_dev *dev = data;
	/* set as input.*/
	smi_clear(sw_ctl, SW_I2C_MSK_CLK_EN);
	udelay(1);
	return (smi_read(sw_ctl) & SW_I2C_MSK_CLK_IN) ? 1 : 0;
}
/* i2c 0.*/
static void smi_i2c0_setsda(void *data, int state)
{
	struct smi_dev *dev = data;

	smi_i2c_setsda(dev, state, I2C_A_SW_CTL);
}

static void smi_i2c0_setscl(void *data, int state)
{
	struct smi_dev *dev = data;

	smi_i2c_setscl(dev, state, I2C_A_SW_CTL);
}

static int smi_i2c0_getsda(void *data)
{
	struct smi_dev *dev = data;

	return	smi_i2c_getsda(dev, I2C_A_SW_CTL);
}

static int smi_i2c0_getscl(void *data)
{
	struct smi_dev *dev = data;

	return	smi_i2c_getscl(dev, I2C_A_SW_CTL);
}
/* i2c 1.*/
static void smi_i2c1_setsda(void *data, int state)
{
	struct smi_dev *dev = data;

	smi_i2c_setsda(dev, state, I2C_B_SW_CTL);
}

static void smi_i2c1_setscl(void *data, int state)
{
	struct smi_dev *dev = data;

	smi_i2c_setscl(dev, state, I2C_B_SW_CTL);
}

static int smi_i2c1_getsda(void *data)
{
	struct smi_dev *dev = data;

	return	smi_i2c_getsda(dev, I2C_B_SW_CTL);
}

static int smi_i2c1_getscl(void *data)
{
	struct smi_dev *dev = data;

	return	smi_i2c_getscl(dev, I2C_B_SW_CTL);
}

static int smi_i2c_init(struct smi_dev *dev)
{
	int ret;

	/* i2c bus 0 */
	smi_i2c_cfg(dev, I2C_A_SW_CTL);
	i2c_set_adapdata(&dev->i2c_bus[0], dev);
	strcpy(dev->i2c_bus[0].name, "SMI-I2C0");
	dev->i2c_bus[0].owner = THIS_MODULE;
	dev->i2c_bus[0].dev.parent = &dev->pci_dev->dev;
	dev->i2c_bus[0].algo_data = &dev->i2c_bit[0];
	dev->i2c_bit[0].data = dev;
	dev->i2c_bit[0].setsda = smi_i2c0_setsda;
	dev->i2c_bit[0].setscl = smi_i2c0_setscl;
	dev->i2c_bit[0].getsda = smi_i2c0_getsda;
	dev->i2c_bit[0].getscl = smi_i2c0_getscl;
	dev->i2c_bit[0].udelay = 12;
	dev->i2c_bit[0].timeout = 10;
	/* Raise SCL and SDA */
	smi_i2c0_setsda(dev, 1);
	smi_i2c0_setscl(dev, 1);

	ret = i2c_bit_add_bus(&dev->i2c_bus[0]);
	if (ret < 0)
		return ret;

	/* i2c bus 1 */
	smi_i2c_cfg(dev, I2C_B_SW_CTL);
	i2c_set_adapdata(&dev->i2c_bus[1], dev);
	strcpy(dev->i2c_bus[1].name, "SMI-I2C1");
	dev->i2c_bus[1].owner = THIS_MODULE;
	dev->i2c_bus[1].dev.parent = &dev->pci_dev->dev;
	dev->i2c_bus[1].algo_data = &dev->i2c_bit[1];
	dev->i2c_bit[1].data = dev;
	dev->i2c_bit[1].setsda = smi_i2c1_setsda;
	dev->i2c_bit[1].setscl = smi_i2c1_setscl;
	dev->i2c_bit[1].getsda = smi_i2c1_getsda;
	dev->i2c_bit[1].getscl = smi_i2c1_getscl;
	dev->i2c_bit[1].udelay = 12;
	dev->i2c_bit[1].timeout = 10;
	/* Raise SCL and SDA */
	smi_i2c1_setsda(dev, 1);
	smi_i2c1_setscl(dev, 1);

	ret = i2c_bit_add_bus(&dev->i2c_bus[1]);
	if (ret < 0)
		i2c_del_adapter(&dev->i2c_bus[0]);

	return ret;
}

static void smi_i2c_exit(struct smi_dev *dev)
{
	i2c_del_adapter(&dev->i2c_bus[0]);
	i2c_del_adapter(&dev->i2c_bus[1]);
}

static int smi_read_eeprom(struct i2c_adapter *i2c, u16 reg, u8 *data, u16 size)
{
	int ret;
	u8 b0[2] = { (reg >> 8) & 0xff, reg & 0xff };

	struct i2c_msg msg[] = {
		{ .addr = 0x50, .flags = 0,
			.buf = b0, .len = 2 },
		{ .addr = 0x50, .flags = I2C_M_RD,
			.buf = data, .len = size }
	};

	ret = i2c_transfer(i2c, msg, 2);

	if (ret != 2) {
		dev_err(&i2c->dev, "%s: reg=0x%x (error=%d)\n",
			__func__, reg, ret);
		return ret;
	}
	return ret;
}

/* ts port interrupt operations */
static void smi_port_disableInterrupt(struct smi_port *port)
{
	struct smi_dev *dev = port->dev;

	smi_write(MSI_INT_ENA_CLR,
		(port->_dmaInterruptCH0 | port->_dmaInterruptCH1));
}

static void smi_port_enableInterrupt(struct smi_port *port)
{
	struct smi_dev *dev = port->dev;

	smi_write(MSI_INT_ENA_SET,
		(port->_dmaInterruptCH0 | port->_dmaInterruptCH1));
}

static void smi_port_clearInterrupt(struct smi_port *port)
{
	struct smi_dev *dev = port->dev;

	smi_write(MSI_INT_STATUS_CLR,
		(port->_dmaInterruptCH0 | port->_dmaInterruptCH1));
}

/* tasklet handler: DMA data to dmx.*/
static void smi_dma_xfer(unsigned long data)
{
	struct smi_port *port = (struct smi_port *) data;
	struct smi_dev *dev = port->dev;
	u32 intr_status, finishedData, dmaManagement;
	u8 dmaChan0State, dmaChan1State;

	intr_status = port->_int_status;
	dmaManagement = smi_read(port->DMA_MANAGEMENT);
	dmaChan0State = (u8)((dmaManagement & 0x00000030) >> 4);
	dmaChan1State = (u8)((dmaManagement & 0x00300000) >> 20);

	/* CH-0 DMA interrupt.*/
	if ((intr_status & port->_dmaInterruptCH0) && (dmaChan0State == 0x01)) {
		dev_dbg(&dev->pci_dev->dev,
			"Port[%d]-DMA CH0 engine complete successful !\n",
			port->idx);
		finishedData = smi_read(port->DMA_CHAN0_TRANS_STATE);
		finishedData &= 0x003FFFFF;
		/* value of DMA_PORT0_CHAN0_TRANS_STATE register [21:0]
		 * indicate dma total transfer length and
		 * zero of [21:0] indicate dma total transfer length
		 * equal to 0x400000 (4MB)*/
		if (finishedData == 0)
			finishedData = 0x00400000;
		if (finishedData != SMI_TS_DMA_BUF_SIZE) {
			dev_dbg(&dev->pci_dev->dev,
				"DMA CH0 engine complete length mismatched, finish data=%d !\n",
				finishedData);
		}
		dvb_dmx_swfilter_packets(&port->demux,
			port->cpu_addr[0], (finishedData / 188));
		/*dvb_dmx_swfilter(&port->demux,
			port->cpu_addr[0], finishedData);*/
	}
	/* CH-1 DMA interrupt.*/
	if ((intr_status & port->_dmaInterruptCH1) && (dmaChan1State == 0x01)) {
		dev_dbg(&dev->pci_dev->dev,
			"Port[%d]-DMA CH1 engine complete successful !\n",
			port->idx);
		finishedData = smi_read(port->DMA_CHAN1_TRANS_STATE);
		finishedData &= 0x003FFFFF;
		/* value of DMA_PORT0_CHAN0_TRANS_STATE register [21:0]
		 * indicate dma total transfer length and
		 * zero of [21:0] indicate dma total transfer length
		 * equal to 0x400000 (4MB)*/
		if (finishedData == 0)
			finishedData = 0x00400000;
		if (finishedData != SMI_TS_DMA_BUF_SIZE) {
			dev_dbg(&dev->pci_dev->dev,
				"DMA CH1 engine complete length mismatched, finish data=%d !\n",
				finishedData);
		}
		dvb_dmx_swfilter_packets(&port->demux,
			port->cpu_addr[1], (finishedData / 188));
		/*dvb_dmx_swfilter(&port->demux,
			port->cpu_addr[1], finishedData);*/
	}
	/* restart DMA.*/
	if (intr_status & port->_dmaInterruptCH0)
		dmaManagement |= 0x00000002;
	if (intr_status & port->_dmaInterruptCH1)
		dmaManagement |= 0x00020000;
	smi_write(port->DMA_MANAGEMENT, dmaManagement);
	/* Re-enable interrupts */
	smi_port_enableInterrupt(port);
}

static void smi_port_dma_free(struct smi_port *port)
{
	if (port->cpu_addr[0]) {
		pci_free_consistent(port->dev->pci_dev, SMI_TS_DMA_BUF_SIZE,
				    port->cpu_addr[0], port->dma_addr[0]);
		port->cpu_addr[0] = NULL;
	}
	if (port->cpu_addr[1]) {
		pci_free_consistent(port->dev->pci_dev, SMI_TS_DMA_BUF_SIZE,
				    port->cpu_addr[1], port->dma_addr[1]);
		port->cpu_addr[1] = NULL;
	}
}

static int smi_port_init(struct smi_port *port, int dmaChanUsed)
{
	dev_dbg(&port->dev->pci_dev->dev,
		"%s, port %d, dmaused %d\n", __func__, port->idx, dmaChanUsed);
	port->enable = 0;
	if (port->idx == 0) {
		/* Port A */
		port->_dmaInterruptCH0 = dmaChanUsed & 0x01;
		port->_dmaInterruptCH1 = dmaChanUsed & 0x02;

		port->DMA_CHAN0_ADDR_LOW	= DMA_PORTA_CHAN0_ADDR_LOW;
		port->DMA_CHAN0_ADDR_HI		= DMA_PORTA_CHAN0_ADDR_HI;
		port->DMA_CHAN0_TRANS_STATE	= DMA_PORTA_CHAN0_TRANS_STATE;
		port->DMA_CHAN0_CONTROL		= DMA_PORTA_CHAN0_CONTROL;
		port->DMA_CHAN1_ADDR_LOW	= DMA_PORTA_CHAN1_ADDR_LOW;
		port->DMA_CHAN1_ADDR_HI		= DMA_PORTA_CHAN1_ADDR_HI;
		port->DMA_CHAN1_TRANS_STATE	= DMA_PORTA_CHAN1_TRANS_STATE;
		port->DMA_CHAN1_CONTROL		= DMA_PORTA_CHAN1_CONTROL;
		port->DMA_MANAGEMENT		= DMA_PORTA_MANAGEMENT;
	} else {
		/* Port B */
		port->_dmaInterruptCH0 = (dmaChanUsed << 2) & 0x04;
		port->_dmaInterruptCH1 = (dmaChanUsed << 2) & 0x08;

		port->DMA_CHAN0_ADDR_LOW	= DMA_PORTB_CHAN0_ADDR_LOW;
		port->DMA_CHAN0_ADDR_HI		= DMA_PORTB_CHAN0_ADDR_HI;
		port->DMA_CHAN0_TRANS_STATE	= DMA_PORTB_CHAN0_TRANS_STATE;
		port->DMA_CHAN0_CONTROL		= DMA_PORTB_CHAN0_CONTROL;
		port->DMA_CHAN1_ADDR_LOW	= DMA_PORTB_CHAN1_ADDR_LOW;
		port->DMA_CHAN1_ADDR_HI		= DMA_PORTB_CHAN1_ADDR_HI;
		port->DMA_CHAN1_TRANS_STATE	= DMA_PORTB_CHAN1_TRANS_STATE;
		port->DMA_CHAN1_CONTROL		= DMA_PORTB_CHAN1_CONTROL;
		port->DMA_MANAGEMENT		= DMA_PORTB_MANAGEMENT;
	}

	if (port->_dmaInterruptCH0) {
		port->cpu_addr[0] = pci_alloc_consistent(port->dev->pci_dev,
					SMI_TS_DMA_BUF_SIZE,
					&port->dma_addr[0]);
		if (!port->cpu_addr[0]) {
			dev_err(&port->dev->pci_dev->dev,
				"Port[%d] DMA CH0 memory allocation failed!\n",
				port->idx);
			goto err;
		}
	}

	if (port->_dmaInterruptCH1) {
		port->cpu_addr[1] = pci_alloc_consistent(port->dev->pci_dev,
					SMI_TS_DMA_BUF_SIZE,
					&port->dma_addr[1]);
		if (!port->cpu_addr[1]) {
			dev_err(&port->dev->pci_dev->dev,
				"Port[%d] DMA CH1 memory allocation failed!\n",
				port->idx);
			goto err;
		}
	}

	smi_port_disableInterrupt(port);
	tasklet_init(&port->tasklet, smi_dma_xfer, (unsigned long)port);
	tasklet_disable(&port->tasklet);
	port->enable = 1;
	return 0;
err:
	smi_port_dma_free(port);
	return -ENOMEM;
}

static void smi_port_exit(struct smi_port *port)
{
	smi_port_disableInterrupt(port);
	tasklet_kill(&port->tasklet);
	smi_port_dma_free(port);
	port->enable = 0;
}

static void smi_port_irq(struct smi_port *port, u32 int_status)
{
	u32 port_req_irq = port->_dmaInterruptCH0 | port->_dmaInterruptCH1;

	if (int_status & port_req_irq) {
		smi_port_disableInterrupt(port);
		port->_int_status = int_status;
		smi_port_clearInterrupt(port);
		tasklet_schedule(&port->tasklet);
	}
}

static irqreturn_t smi_irq_handler(int irq, void *dev_id)
{
	struct smi_dev *dev = dev_id;
	struct smi_port *port0 = &dev->ts_port[0];
	struct smi_port *port1 = &dev->ts_port[1];

	u32 intr_status = smi_read(MSI_INT_STATUS);

	/* ts0 interrupt.*/
	if (dev->info->ts_0)
		smi_port_irq(port0, intr_status);

	/* ts1 interrupt.*/
	if (dev->info->ts_1)
		smi_port_irq(port1, intr_status);

	return IRQ_HANDLED;
}

static const struct m88ds3103_config smi_dvbsky_m88ds3103_cfg = {
	.i2c_addr = 0x68,
	.clock = 27000000,
	.i2c_wr_max = 33,
	.clock_out = 0,
	.ts_mode = M88DS3103_TS_PARALLEL,
	.ts_clk = 16000,
	.ts_clk_pol = 1,
	.agc = 0x99,
	.lnb_hv_pol = 0,
	.lnb_en_pol = 1,
};

static int smi_dvbsky_m88ds3103_fe_attach(struct smi_port *port)
{
	int ret = 0;
	struct smi_dev *dev = port->dev;
	struct i2c_adapter *i2c;
	/* tuner I2C module */
	struct i2c_adapter *tuner_i2c_adapter;
	struct i2c_client *tuner_client;
	struct i2c_board_info tuner_info;
	struct m88ts2022_config m88ts2022_config = {
		.clock = 27000000,
	};
	memset(&tuner_info, 0, sizeof(struct i2c_board_info));
	i2c = (port->idx == 0) ? &dev->i2c_bus[0] : &dev->i2c_bus[1];

	/* attach demod */
	port->fe = dvb_attach(m88ds3103_attach,
			&smi_dvbsky_m88ds3103_cfg, i2c, &tuner_i2c_adapter);
	if (!port->fe) {
		ret = -ENODEV;
		return ret;
	}
	/* attach tuner */
	m88ts2022_config.fe = port->fe;
	strlcpy(tuner_info.type, "m88ts2022", I2C_NAME_SIZE);
	tuner_info.addr = 0x60;
	tuner_info.platform_data = &m88ts2022_config;
	request_module("m88ts2022");
	tuner_client = i2c_new_device(tuner_i2c_adapter, &tuner_info);
	if (tuner_client == NULL || tuner_client->dev.driver == NULL) {
		ret = -ENODEV;
		goto err_tuner_i2c_device;
	}

	if (!try_module_get(tuner_client->dev.driver->owner)) {
		ret = -ENODEV;
		goto err_tuner_i2c_module;
	}

	/* delegate signal strength measurement to tuner */
	port->fe->ops.read_signal_strength =
			port->fe->ops.tuner_ops.get_rf_strength;

	port->i2c_client_tuner = tuner_client;
	return ret;

err_tuner_i2c_module:
	i2c_unregister_device(tuner_client);
err_tuner_i2c_device:
	dvb_frontend_detach(port->fe);
	return ret;
}

static int smi_fe_init(struct smi_port *port)
{
	int ret = 0;
	struct smi_dev *dev = port->dev;
	struct dvb_adapter *adap = &port->dvb_adapter;
	u8 mac_ee[16];

	dev_dbg(&port->dev->pci_dev->dev,
		"%s: port %d, fe_type = %d\n",
		__func__, port->idx, port->fe_type);
	switch (port->fe_type) {
	case DVBSKY_FE_M88DS3103:
		ret = smi_dvbsky_m88ds3103_fe_attach(port);
		break;
	}
	if (ret < 0)
		return ret;

	/* register dvb frontend */
	ret = dvb_register_frontend(adap, port->fe);
	if (ret < 0) {
		i2c_unregister_device(port->i2c_client_tuner);
		dvb_frontend_detach(port->fe);
		return ret;
	}
	/* init MAC.*/
	ret = smi_read_eeprom(&dev->i2c_bus[0], 0xc0, mac_ee, 16);
	dev_info(&port->dev->pci_dev->dev,
		"DVBSky SMI PCIe MAC= %pM\n", mac_ee + (port->idx)*8);
	memcpy(adap->proposed_mac, mac_ee + (port->idx)*8, 6);
	return ret;
}

static void smi_fe_exit(struct smi_port *port)
{
	struct i2c_client *tuner_client;

	dvb_unregister_frontend(port->fe);
	/* remove I2C tuner */
	tuner_client = port->i2c_client_tuner;
	if (tuner_client) {
		module_put(tuner_client->dev.driver->owner);
		i2c_unregister_device(tuner_client);
	}
	dvb_frontend_detach(port->fe);
}

static int my_dvb_dmx_ts_card_init(struct dvb_demux *dvbdemux, char *id,
			    int (*start_feed)(struct dvb_demux_feed *),
			    int (*stop_feed)(struct dvb_demux_feed *),
			    void *priv)
{
	dvbdemux->priv = priv;

	dvbdemux->filternum = 256;
	dvbdemux->feednum = 256;
	dvbdemux->start_feed = start_feed;
	dvbdemux->stop_feed = stop_feed;
	dvbdemux->write_to_decoder = NULL;
	dvbdemux->dmx.capabilities = (DMX_TS_FILTERING |
				      DMX_SECTION_FILTERING |
				      DMX_MEMORY_BASED_FILTERING);
	return dvb_dmx_init(dvbdemux);
}

static int my_dvb_dmxdev_ts_card_init(struct dmxdev *dmxdev,
			       struct dvb_demux *dvbdemux,
			       struct dmx_frontend *hw_frontend,
			       struct dmx_frontend *mem_frontend,
			       struct dvb_adapter *dvb_adapter)
{
	int ret;

	dmxdev->filternum = 256;
	dmxdev->demux = &dvbdemux->dmx;
	dmxdev->capabilities = 0;
	ret = dvb_dmxdev_init(dmxdev, dvb_adapter);
	if (ret < 0)
		return ret;

	hw_frontend->source = DMX_FRONTEND_0;
	dvbdemux->dmx.add_frontend(&dvbdemux->dmx, hw_frontend);
	mem_frontend->source = DMX_MEMORY_FE;
	dvbdemux->dmx.add_frontend(&dvbdemux->dmx, mem_frontend);
	return dvbdemux->dmx.connect_frontend(&dvbdemux->dmx, hw_frontend);
}

static u32 smi_config_DMA(struct smi_port *port)
{
	struct smi_dev *dev = port->dev;
	u32 totalLength = 0, dmaMemPtrLow, dmaMemPtrHi, dmaCtlReg;
	u8 chanLatencyTimer = 0, dmaChanEnable = 1, dmaTransStart = 1;
	u32 dmaManagement = 0, tlpTransUnit = DMA_TRANS_UNIT_188;
	u8 tlpTc = 0, tlpTd = 1, tlpEp = 0, tlpAttr = 0;
	u64 mem;

	dmaManagement = smi_read(port->DMA_MANAGEMENT);
	/* Setup Channel-0 */
	if (port->_dmaInterruptCH0) {
		totalLength = SMI_TS_DMA_BUF_SIZE;
		mem = port->dma_addr[0];
		dmaMemPtrLow = mem & 0xffffffff;
		dmaMemPtrHi = mem >> 32;
		dmaCtlReg = (totalLength) | (tlpTransUnit << 22) | (tlpTc << 25)
			| (tlpTd << 28) | (tlpEp << 29) | (tlpAttr << 30);
		dmaManagement |= dmaChanEnable | (dmaTransStart << 1)
			| (chanLatencyTimer << 8);
		/* write DMA register, start DMA engine */
		smi_write(port->DMA_CHAN0_ADDR_LOW, dmaMemPtrLow);
		smi_write(port->DMA_CHAN0_ADDR_HI, dmaMemPtrHi);
		smi_write(port->DMA_CHAN0_CONTROL, dmaCtlReg);
	}
	/* Setup Channel-1 */
	if (port->_dmaInterruptCH1) {
		totalLength = SMI_TS_DMA_BUF_SIZE;
		mem = port->dma_addr[1];
		dmaMemPtrLow = mem & 0xffffffff;
		dmaMemPtrHi = mem >> 32;
		dmaCtlReg = (totalLength) | (tlpTransUnit << 22) | (tlpTc << 25)
			| (tlpTd << 28) | (tlpEp << 29) | (tlpAttr << 30);
		dmaManagement |= (dmaChanEnable << 16) | (dmaTransStart << 17)
			| (chanLatencyTimer << 24);
		/* write DMA register, start DMA engine */
		smi_write(port->DMA_CHAN1_ADDR_LOW, dmaMemPtrLow);
		smi_write(port->DMA_CHAN1_ADDR_HI, dmaMemPtrHi);
		smi_write(port->DMA_CHAN1_CONTROL, dmaCtlReg);
	}
	return dmaManagement;
}

static int smi_start_feed(struct dvb_demux_feed *dvbdmxfeed)
{
	struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
	struct smi_port *port = dvbdmx->priv;
	struct smi_dev *dev = port->dev;
	u32 dmaManagement;

	if (port->users++ == 0) {
		dmaManagement = smi_config_DMA(port);
		smi_port_clearInterrupt(port);
		smi_port_enableInterrupt(port);
		smi_write(port->DMA_MANAGEMENT, dmaManagement);
		tasklet_enable(&port->tasklet);
	}
	return port->users;
}

static int smi_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
{
	struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
	struct smi_port *port = dvbdmx->priv;
	struct smi_dev *dev = port->dev;

	if (--port->users)
		return port->users;

	tasklet_disable(&port->tasklet);
	smi_port_disableInterrupt(port);
	smi_clear(port->DMA_MANAGEMENT, 0x30003);
	return 0;
}

static int smi_dvb_init(struct smi_port *port)
{
	int ret;
	struct dvb_adapter *adap = &port->dvb_adapter;
	struct dvb_demux *dvbdemux = &port->demux;

	dev_dbg(&port->dev->pci_dev->dev,
		"%s, port %d\n", __func__, port->idx);

	ret = dvb_register_adapter(adap, "SMI_DVB", THIS_MODULE,
				   &port->dev->pci_dev->dev,
				   adapter_nr);
	if (ret < 0) {
		dev_err(&port->dev->pci_dev->dev, "Fail to register DVB adapter.\n");
		return ret;
	}
	ret = my_dvb_dmx_ts_card_init(dvbdemux, "SW demux",
				      smi_start_feed,
				      smi_stop_feed, port);
	if (ret < 0)
		goto err_del_dvb_register_adapter;

	ret = my_dvb_dmxdev_ts_card_init(&port->dmxdev, &port->demux,
					 &port->hw_frontend,
					 &port->mem_frontend, adap);
	if (ret < 0)
		goto err_del_dvb_dmx;

	ret = dvb_net_init(adap, &port->dvbnet, port->dmxdev.demux);
	if (ret < 0)
		goto err_del_dvb_dmxdev;
	return 0;
err_del_dvb_dmxdev:
	dvbdemux->dmx.close(&dvbdemux->dmx);
	dvbdemux->dmx.remove_frontend(&dvbdemux->dmx, &port->hw_frontend);
	dvbdemux->dmx.remove_frontend(&dvbdemux->dmx, &port->mem_frontend);
	dvb_dmxdev_release(&port->dmxdev);
err_del_dvb_dmx:
	dvb_dmx_release(&port->demux);
err_del_dvb_register_adapter:
	dvb_unregister_adapter(&port->dvb_adapter);
	return ret;
}

static void smi_dvb_exit(struct smi_port *port)
{
	struct dvb_demux *dvbdemux = &port->demux;

	dvb_net_release(&port->dvbnet);

	dvbdemux->dmx.close(&dvbdemux->dmx);
	dvbdemux->dmx.remove_frontend(&dvbdemux->dmx, &port->hw_frontend);
	dvbdemux->dmx.remove_frontend(&dvbdemux->dmx, &port->mem_frontend);
	dvb_dmxdev_release(&port->dmxdev);
	dvb_dmx_release(&port->demux);

	dvb_unregister_adapter(&port->dvb_adapter);
}

static int smi_port_attach(struct smi_dev *dev,
		struct smi_port *port, int index)
{
	int ret, dmachs;

	port->dev = dev;
	port->idx = index;
	port->fe_type = (index == 0) ? dev->info->fe_0 : dev->info->fe_1;
	dmachs = (index == 0) ? dev->info->ts_0 : dev->info->ts_1;
	/* port init.*/
	ret = smi_port_init(port, dmachs);
	if (ret < 0)
		return ret;
	/* dvb init.*/
	ret = smi_dvb_init(port);
	if (ret < 0)
		goto err_del_port_init;
	/* fe init.*/
	ret = smi_fe_init(port);
	if (ret < 0)
		goto err_del_dvb_init;
	return 0;
err_del_dvb_init:
	smi_dvb_exit(port);
err_del_port_init:
	smi_port_exit(port);
	return ret;
}

static void smi_port_detach(struct smi_port *port)
{
	smi_fe_exit(port);
	smi_dvb_exit(port);
	smi_port_exit(port);
}

static int smi_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct smi_dev *dev;
	int ret = -ENOMEM;

	if (pci_enable_device(pdev) < 0)
		return -ENODEV;

	dev = kzalloc(sizeof(struct smi_dev), GFP_KERNEL);
	if (!dev) {
		ret = -ENOMEM;
		goto err_pci_disable_device;
	}

	dev->pci_dev = pdev;
	pci_set_drvdata(pdev, dev);
	dev->info = (struct smi_cfg_info *) id->driver_data;
	dev_info(&dev->pci_dev->dev,
		"card detected: %s\n", dev->info->name);

	dev->nr = dev->info->type;
	dev->lmmio = ioremap(pci_resource_start(dev->pci_dev, 0),
			    pci_resource_len(dev->pci_dev, 0));
	if (!dev->lmmio) {
		ret = -ENOMEM;
		goto err_kfree;
	}

	/* should we set to 32bit DMA? */
	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
	if (ret < 0)
		goto err_pci_iounmap;

	pci_set_master(pdev);

	ret = smi_hw_init(dev);
	if (ret < 0)
		goto err_pci_iounmap;

	ret = smi_i2c_init(dev);
	if (ret < 0)
		goto err_pci_iounmap;

	if (dev->info->ts_0) {
		ret = smi_port_attach(dev, &dev->ts_port[0], 0);
		if (ret < 0)
			goto err_del_i2c_adaptor;
	}

	if (dev->info->ts_1) {
		ret = smi_port_attach(dev, &dev->ts_port[1], 1);
		if (ret < 0)
			goto err_del_port0_attach;
	}

#ifdef CONFIG_PCI_MSI /* to do msi interrupt.???*/
	if (pci_msi_enabled())
		ret = pci_enable_msi(dev->pci_dev);
	if (ret)
		dev_info(&dev->pci_dev->dev, "MSI not available.\n");
#endif

	ret = request_irq(dev->pci_dev->irq, smi_irq_handler,
			   IRQF_SHARED, "SMI_PCIE", dev);
	if (ret < 0)
		goto err_del_port1_attach;

	return 0;

err_del_port1_attach:
	if (dev->info->ts_1)
		smi_port_detach(&dev->ts_port[1]);
err_del_port0_attach:
	if (dev->info->ts_0)
		smi_port_detach(&dev->ts_port[0]);
err_del_i2c_adaptor:
	smi_i2c_exit(dev);
err_pci_iounmap:
	iounmap(dev->lmmio);
err_kfree:
	pci_set_drvdata(pdev, 0);
	kfree(dev);
err_pci_disable_device:
	pci_disable_device(pdev);
	return ret;
}

static void smi_remove(struct pci_dev *pdev)
{
	struct smi_dev *dev = pci_get_drvdata(pdev);

	smi_write(MSI_INT_ENA_CLR, ALL_INT);
	free_irq(dev->pci_dev->irq, dev);
#ifdef CONFIG_PCI_MSI
	pci_disable_msi(dev->pci_dev);
#endif
	if (dev->info->ts_1)
		smi_port_detach(&dev->ts_port[1]);
	if (dev->info->ts_0)
		smi_port_detach(&dev->ts_port[0]);

	smi_i2c_exit(dev);
	iounmap(dev->lmmio);
	pci_set_drvdata(pdev, 0);
	pci_disable_device(pdev);
	kfree(dev);
}

/* DVBSky cards */
static struct smi_cfg_info dvbsky_s950_cfg = {
	.type = SMI_DVBSKY_S950,
	.name = "DVBSky S950 V3",
	.ts_0 = SMI_TS_NULL,
	.ts_1 = SMI_TS_DMA_BOTH,
	.fe_0 = DVBSKY_FE_NULL,
	.fe_1 = DVBSKY_FE_M88DS3103,
};

/* PCI IDs */
#define SMI_ID(_subvend, _subdev, _driverdata) {	\
	.vendor      = SMI_VID,    .device    = SMI_PID, \
	.subvendor   = _subvend, .subdevice = _subdev, \
	.driver_data = (unsigned long)&_driverdata }

static const struct pci_device_id smi_id_table[] = {
	SMI_ID(0x4254, 0x0550, dvbsky_s950_cfg),
	{0}
};
MODULE_DEVICE_TABLE(pci, smi_id_table);

static struct pci_driver smipcie_driver = {
	.name = "SMI PCIe driver",
	.id_table = smi_id_table,
	.probe = smi_probe,
	.remove = smi_remove,
};

module_pci_driver(smipcie_driver);

MODULE_AUTHOR("Max nibble <nibble.max@gmail.com>");
MODULE_DESCRIPTION("SMI PCIe driver");
MODULE_LICENSE("GPL");