[mirror_ubuntu-artful-kernel.git] / drivers / media / dvb / b2c2 / flexcop-pci.c

/*
 * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
 *
 * flexcop-pci.c - covers the PCI part including DMA transfers.
 *
 * see flexcop.c for copyright information.
 */

#define FC_LOG_PREFIX "flexcop-pci"
#include "flexcop-common.h"

static int enable_pid_filtering = 1;
module_param(enable_pid_filtering, int, 0444);
MODULE_PARM_DESC(enable_pid_filtering, "enable hardware pid filtering: supported values: 0 (fullts), 1");

static int irq_chk_intv;
module_param(irq_chk_intv, int, 0644);
MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ watchdog (currently just debugging).");

#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
#define dprintk(level,args...) \
	do { if ((debug & level)) printk(args); } while (0)
#define DEBSTATUS ""
#else
#define dprintk(level,args...)
#define DEBSTATUS " (debugging is not enabled)"
#endif

#define deb_info(args...)  dprintk(0x01,args)
#define deb_reg(args...)   dprintk(0x02,args)
#define deb_ts(args...)    dprintk(0x04,args)
#define deb_irq(args...)   dprintk(0x08,args)
#define deb_chk(args...)   dprintk(0x10,args)

static int debug = 0;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "set debug level (1=info,2=regs,4=TS,8=irqdma (|-able))." DEBSTATUS);

#define DRIVER_VERSION "0.1"
#define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV PCI Driver"
#define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>"

struct flexcop_pci {
	struct pci_dev *pdev;

#define FC_PCI_INIT     0x01
#define FC_PCI_DMA_INIT 0x02
	int init_state;

	void __iomem *io_mem;
	u32 irq;
/* buffersize (at least for DMA1, need to be % 188 == 0,
 * this logic is required */
#define FC_DEFAULT_DMA1_BUFSIZE (1280 * 188)
#define FC_DEFAULT_DMA2_BUFSIZE (10 * 188)
	struct flexcop_dma dma[2];

	int active_dma1_addr; /* 0 = addr0 of dma1; 1 = addr1 of dma1 */
	u32 last_dma1_cur_pos; /* position of the pointer last time the timer/packet irq occured */
	int count;

	spinlock_t irq_lock;

	unsigned long last_irq;

	struct work_struct irq_check_work;

	struct flexcop_device *fc_dev;
};

static int lastwreg,lastwval,lastrreg,lastrval;

static flexcop_ibi_value flexcop_pci_read_ibi_reg (struct flexcop_device *fc, flexcop_ibi_register r)
{
	struct flexcop_pci *fc_pci = fc->bus_specific;
	flexcop_ibi_value v;
	v.raw = readl(fc_pci->io_mem + r);

	if (lastrreg != r || lastrval != v.raw) {
		lastrreg = r; lastrval = v.raw;
		deb_reg("new rd: %3x: %08x\n",r,v.raw);
	}

	return v;
}

static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register r, flexcop_ibi_value v)
{
	struct flexcop_pci *fc_pci = fc->bus_specific;

	if (lastwreg != r || lastwval != v.raw) {
		lastwreg = r; lastwval = v.raw;
		deb_reg("new wr: %3x: %08x\n",r,v.raw);
	}

	writel(v.raw, fc_pci->io_mem + r);
	return 0;
}

static void flexcop_pci_irq_check_work(void *data)
{
	struct flexcop_pci *fc_pci = data;
	struct flexcop_device *fc = fc_pci->fc_dev;

	flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);

	flexcop_dump_reg(fc_pci->fc_dev,dma1_000,4);

	if (v.sram_dest_reg_714.net_ovflow_error)
		deb_chk("sram net_ovflow_error\n");
	if (v.sram_dest_reg_714.media_ovflow_error)
		deb_chk("sram media_ovflow_error\n");
	if (v.sram_dest_reg_714.cai_ovflow_error)
		deb_chk("sram cai_ovflow_error\n");
	if (v.sram_dest_reg_714.cai_ovflow_error)
		deb_chk("sram cai_ovflow_error\n");

	schedule_delayed_work(&fc_pci->irq_check_work,
			msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
}

/* When PID filtering is turned on, we use the timer IRQ, because small amounts
 * of data need to be passed to the user space instantly as well. When PID
 * filtering is turned off, we use the page-change-IRQ */
static irqreturn_t flexcop_pci_isr(int irq, void *dev_id, struct pt_regs *regs)
{
	struct flexcop_pci *fc_pci = dev_id;
	struct flexcop_device *fc = fc_pci->fc_dev;
	flexcop_ibi_value v;
	irqreturn_t ret = IRQ_HANDLED;

	spin_lock_irq(&fc_pci->irq_lock);

	v = fc->read_ibi_reg(fc,irq_20c);

   /* errors */
	if (v.irq_20c.Data_receiver_error)
		deb_chk("data receiver error\n");
	if (v.irq_20c.Continuity_error_flag)
		deb_chk("Contunuity error flag is set\n");
	if (v.irq_20c.LLC_SNAP_FLAG_set)
		deb_chk("LLC_SNAP_FLAG_set is set\n");
	if (v.irq_20c.Transport_Error)
		deb_chk("Transport error\n");

	if ((fc_pci->count % 1000) == 0)
		deb_chk("%d valid irq took place so far\n",fc_pci->count);

	if (v.irq_20c.DMA1_IRQ_Status == 1) {
		if (fc_pci->active_dma1_addr == 0)
			flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr0,fc_pci->dma[0].size / 188);
		else
			flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr1,fc_pci->dma[0].size / 188);

		deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr);
		fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr;
	} else if (v.irq_20c.DMA1_Timer_Status == 1) {
		/* for the timer IRQ we only can use buffer dmx feeding, because we don't have
		 * complete TS packets when reading from the DMA memory */
		dma_addr_t cur_addr =
			fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2;
		u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0;

		deb_irq("%u irq: %08x cur_addr: %llx: cur_pos: %08x, last_cur_pos: %08x ",
				jiffies_to_usecs(jiffies - fc_pci->last_irq),
				v.raw, (unsigned long long)cur_addr, cur_pos,
				fc_pci->last_dma1_cur_pos);
		fc_pci->last_irq = jiffies;

		/* buffer end was reached, restarted from the beginning
		 * pass the data from last_cur_pos to the buffer end to the demux
		 */
		if (cur_pos < fc_pci->last_dma1_cur_pos) {
			deb_irq(" end was reached: passing %d bytes ",(fc_pci->dma[0].size*2 - 1) - fc_pci->last_dma1_cur_pos);
			flexcop_pass_dmx_data(fc_pci->fc_dev,
					fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos,
					(fc_pci->dma[0].size*2) - fc_pci->last_dma1_cur_pos);
			fc_pci->last_dma1_cur_pos = 0;
		}

		if (cur_pos > fc_pci->last_dma1_cur_pos) {
			deb_irq(" passing %d bytes ",cur_pos - fc_pci->last_dma1_cur_pos);
			flexcop_pass_dmx_data(fc_pci->fc_dev,
					fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos,
					cur_pos - fc_pci->last_dma1_cur_pos);
		}
		deb_irq("\n");

		fc_pci->last_dma1_cur_pos = cur_pos;
		fc_pci->count++;
	} else {
		deb_irq("isr for flexcop called, apparently without reason (%08x)\n",v.raw);
		ret = IRQ_NONE;
	}

	spin_unlock_irq(&fc_pci->irq_lock);

	return ret;
}

static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff)
{
	struct flexcop_pci *fc_pci = fc->bus_specific;
	if (onoff) {
		flexcop_dma_config(fc,&fc_pci->dma[0],FC_DMA_1);
		flexcop_dma_config(fc,&fc_pci->dma[1],FC_DMA_2);

		flexcop_dma_config_timer(fc,FC_DMA_1,0);

		flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1,1);
		deb_irq("DMA xfer enabled\n");

		fc_pci->last_dma1_cur_pos = 0;
		flexcop_dma_control_timer_irq(fc,FC_DMA_1,1);
		deb_irq("IRQ enabled\n");

//		fc_pci->active_dma1_addr = 0;
//		flexcop_dma_control_size_irq(fc,FC_DMA_1,1);

		if (irq_chk_intv > 0)
			schedule_delayed_work(&fc_pci->irq_check_work,
					msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
	} else {
		if (irq_chk_intv > 0)
			cancel_delayed_work(&fc_pci->irq_check_work);

		flexcop_dma_control_timer_irq(fc,FC_DMA_1,0);
		deb_irq("IRQ disabled\n");

//		flexcop_dma_control_size_irq(fc,FC_DMA_1,0);

		flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 | FC_DMA_SUBADDR_1,0);
		deb_irq("DMA xfer disabled\n");
	}

	return 0;
}

static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci)
{
	int ret;
	if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[0],FC_DEFAULT_DMA1_BUFSIZE)) != 0)
		return ret;

	if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[1],FC_DEFAULT_DMA2_BUFSIZE)) != 0) {
		flexcop_dma_free(&fc_pci->dma[0]);
		return ret;
	}

	flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_MEDIA | FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1);
	flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_CAO   | FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2);

	fc_pci->init_state |= FC_PCI_DMA_INIT;

	return ret;
}

static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci)
{
	if (fc_pci->init_state & FC_PCI_DMA_INIT) {
		flexcop_dma_free(&fc_pci->dma[0]);
		flexcop_dma_free(&fc_pci->dma[1]);
	}
	fc_pci->init_state &= ~FC_PCI_DMA_INIT;
}

static int flexcop_pci_init(struct flexcop_pci *fc_pci)
{
	int ret;
	u8 card_rev;

	pci_read_config_byte(fc_pci->pdev, PCI_CLASS_REVISION, &card_rev);
	info("card revision %x", card_rev);

	if ((ret = pci_enable_device(fc_pci->pdev)) != 0)
		return ret;

	pci_set_master(fc_pci->pdev);

	/* enable interrupts */
	// pci_write_config_dword(pdev, 0x6c, 0x8000);

	if ((ret = pci_request_regions(fc_pci->pdev, DRIVER_NAME)) != 0)
		goto err_pci_disable_device;

	fc_pci->io_mem = pci_iomap(fc_pci->pdev, 0, 0x800);

	if (!fc_pci->io_mem) {
		err("cannot map io memory\n");
		ret = -EIO;
		goto err_pci_release_regions;
	}

	pci_set_drvdata(fc_pci->pdev, fc_pci);

	if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr,
					IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0)
		goto err_pci_iounmap;

	spin_lock_init(&fc_pci->irq_lock);

	fc_pci->init_state |= FC_PCI_INIT;
	return ret;

err_pci_iounmap:
	pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
	pci_set_drvdata(fc_pci->pdev, NULL);
err_pci_release_regions:
	pci_release_regions(fc_pci->pdev);
err_pci_disable_device:
	pci_disable_device(fc_pci->pdev);
	return ret;
}

static void flexcop_pci_exit(struct flexcop_pci *fc_pci)
{
	if (fc_pci->init_state & FC_PCI_INIT) {
		free_irq(fc_pci->pdev->irq, fc_pci);
		pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
		pci_set_drvdata(fc_pci->pdev, NULL);
		pci_release_regions(fc_pci->pdev);
		pci_disable_device(fc_pci->pdev);
	}
	fc_pci->init_state &= ~FC_PCI_INIT;
}


static int flexcop_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	struct flexcop_device *fc;
	struct flexcop_pci *fc_pci;
	int ret = -ENOMEM;

	if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) {
		err("out of memory\n");
		return -ENOMEM;
	}

/* general flexcop init */
	fc_pci = fc->bus_specific;
	fc_pci->fc_dev = fc;

	fc->read_ibi_reg = flexcop_pci_read_ibi_reg;
	fc->write_ibi_reg = flexcop_pci_write_ibi_reg;
	fc->i2c_request = flexcop_i2c_request;
	fc->get_mac_addr = flexcop_eeprom_check_mac_addr;

	fc->stream_control = flexcop_pci_stream_control;

	if (enable_pid_filtering)
		info("will use the HW PID filter.");
	else
		info("will pass the complete TS to the demuxer.");

	fc->pid_filtering = enable_pid_filtering;
	fc->bus_type = FC_PCI;

	fc->dev = &pdev->dev;
	fc->owner = THIS_MODULE;

/* bus specific part */
	fc_pci->pdev = pdev;
	if ((ret = flexcop_pci_init(fc_pci)) != 0)
		goto err_kfree;

/* init flexcop */
	if ((ret = flexcop_device_initialize(fc)) != 0)
		goto err_pci_exit;

/* init dma */
	if ((ret = flexcop_pci_dma_init(fc_pci)) != 0)
		goto err_fc_exit;

	INIT_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work, fc_pci);

	return ret;

err_fc_exit:
	flexcop_device_exit(fc);
err_pci_exit:
	flexcop_pci_exit(fc_pci);
err_kfree:
	flexcop_device_kfree(fc);
	return ret;
}

/* in theory every _exit function should be called exactly two times,
 * here and in the bail-out-part of the _init-function
 */
static void flexcop_pci_remove(struct pci_dev *pdev)
{
	struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);

	flexcop_pci_dma_exit(fc_pci);
	flexcop_device_exit(fc_pci->fc_dev);
	flexcop_pci_exit(fc_pci);
	flexcop_device_kfree(fc_pci->fc_dev);
}

static struct pci_device_id flexcop_pci_tbl[] = {
	{ PCI_DEVICE(0x13d0, 0x2103) },
/*	{ PCI_DEVICE(0x13d0, 0x2200) }, ? */
	{ },
};

MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl);

static struct pci_driver flexcop_pci_driver = {
	.name     = "b2c2_flexcop_pci",
	.id_table = flexcop_pci_tbl,
	.probe    = flexcop_pci_probe,
	.remove   = flexcop_pci_remove,
};

static int __init flexcop_pci_module_init(void)
{
	return pci_register_driver(&flexcop_pci_driver);
}

static void __exit flexcop_pci_module_exit(void)
{
	pci_unregister_driver(&flexcop_pci_driver);
}

module_init(flexcop_pci_module_init);
module_exit(flexcop_pci_module_exit);

MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_NAME);
MODULE_LICENSE("GPL");
Commit	Line	Data
2add87a9 JS	1	/*
	2	* This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
	3	*
	4	* flexcop-pci.c - covers the PCI part including DMA transfers.
	5	*
	6	* see flexcop.c for copyright information.
	7	*/
	8
	9	#define FC_LOG_PREFIX "flexcop-pci"
	10	#include "flexcop-common.h"
	11
c4ee3fd4	12	static int enable_pid_filtering = 1;
2add87a9 JS	13	module_param(enable_pid_filtering, int, 0444);
	14	MODULE_PARM_DESC(enable_pid_filtering, "enable hardware pid filtering: supported values: 0 (fullts), 1");
	15
64221be7 PB	16	static int irq_chk_intv;
	17	module_param(irq_chk_intv, int, 0644);
	18	MODULE_PARM_DESC(irq_chk_intv, "set the interval for IRQ watchdog (currently just debugging).");
	19
2add87a9 JS	20	#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
	21	#define dprintk(level,args...) \
	22	do { if ((debug & level)) printk(args); } while (0)
	23	#define DEBSTATUS ""
	24	#else
	25	#define dprintk(level,args...)
	26	#define DEBSTATUS " (debugging is not enabled)"
	27	#endif
	28
	29	#define deb_info(args...) dprintk(0x01,args)
	30	#define deb_reg(args...) dprintk(0x02,args)
	31	#define deb_ts(args...) dprintk(0x04,args)
	32	#define deb_irq(args...) dprintk(0x08,args)
64221be7	33	#define deb_chk(args...) dprintk(0x10,args)
2add87a9 JS	34
	35	static int debug = 0;
	36	module_param(debug, int, 0644);
	37	MODULE_PARM_DESC(debug, "set debug level (1=info,2=regs,4=TS,8=irqdma (\|-able))." DEBSTATUS);
	38
	39	#define DRIVER_VERSION "0.1"
	40	#define DRIVER_NAME "Technisat/B2C2 FlexCop II/IIb/III Digital TV PCI Driver"
	41	#define DRIVER_AUTHOR "Patrick Boettcher <patrick.boettcher@desy.de>"
	42
	43	struct flexcop_pci {
	44	struct pci_dev *pdev;
	45
	46	#define FC_PCI_INIT 0x01
	47	#define FC_PCI_DMA_INIT 0x02
	48	int init_state;
	49
	50	void __iomem *io_mem;
	51	u32 irq;
	52	/* buffersize (at least for DMA1, need to be % 188 == 0,
c4ee3fd4	53	* this logic is required */
2add87a9 JS	54	#define FC_DEFAULT_DMA1_BUFSIZE (1280 * 188)
	55	#define FC_DEFAULT_DMA2_BUFSIZE (10 * 188)
	56	struct flexcop_dma dma[2];
	57
	58	int active_dma1_addr; /* 0 = addr0 of dma1; 1 = addr1 of dma1 */
	59	u32 last_dma1_cur_pos; /* position of the pointer last time the timer/packet irq occured */
c4ee3fd4	60	int count;
2add87a9	61
4853f16a JS	62	spinlock_t irq_lock;
4853f16a JS	63
64221be7 PB	64	unsigned long last_irq;
	65
	66	struct work_struct irq_check_work;
	67
2add87a9 JS	68	struct flexcop_device *fc_dev;
	69	};
	70
	71	static int lastwreg,lastwval,lastrreg,lastrval;
	72
	73	static flexcop_ibi_value flexcop_pci_read_ibi_reg (struct flexcop_device *fc, flexcop_ibi_register r)
	74	{
	75	struct flexcop_pci *fc_pci = fc->bus_specific;
	76	flexcop_ibi_value v;
	77	v.raw = readl(fc_pci->io_mem + r);
	78
	79	if (lastrreg != r \|\| lastrval != v.raw) {
	80	lastrreg = r; lastrval = v.raw;
	81	deb_reg("new rd: %3x: %08x\n",r,v.raw);
	82	}
	83
	84	return v;
	85	}
	86
	87	static int flexcop_pci_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register r, flexcop_ibi_value v)
	88	{
	89	struct flexcop_pci *fc_pci = fc->bus_specific;
	90
	91	if (lastwreg != r \|\| lastwval != v.raw) {
	92	lastwreg = r; lastwval = v.raw;
	93	deb_reg("new wr: %3x: %08x\n",r,v.raw);
	94	}
	95
	96	writel(v.raw, fc_pci->io_mem + r);
	97	return 0;
	98	}
	99
64221be7 PB	100	static void flexcop_pci_irq_check_work(void *data)
	101	{
	102	struct flexcop_pci *fc_pci = data;
	103	struct flexcop_device *fc = fc_pci->fc_dev;
	104
	105	flexcop_ibi_value v = fc->read_ibi_reg(fc,sram_dest_reg_714);
	106
	107	flexcop_dump_reg(fc_pci->fc_dev,dma1_000,4);
	108
	109	if (v.sram_dest_reg_714.net_ovflow_error)
	110	deb_chk("sram net_ovflow_error\n");
	111	if (v.sram_dest_reg_714.media_ovflow_error)
	112	deb_chk("sram media_ovflow_error\n");
	113	if (v.sram_dest_reg_714.cai_ovflow_error)
	114	deb_chk("sram cai_ovflow_error\n");
	115	if (v.sram_dest_reg_714.cai_ovflow_error)
	116	deb_chk("sram cai_ovflow_error\n");
	117
	118	schedule_delayed_work(&fc_pci->irq_check_work,
	119	msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
	120	}
	121
2add87a9 JS	122	/* When PID filtering is turned on, we use the timer IRQ, because small amounts
	123	* of data need to be passed to the user space instantly as well. When PID
	124	* filtering is turned off, we use the page-change-IRQ */
64221be7	125	static irqreturn_t flexcop_pci_isr(int irq, void dev_id, struct pt_regs regs)
2add87a9 JS	126	{
	127	struct flexcop_pci *fc_pci = dev_id;
	128	struct flexcop_device *fc = fc_pci->fc_dev;
64221be7	129	flexcop_ibi_value v;
4853f16a JS	130	irqreturn_t ret = IRQ_HANDLED;
	131
	132	spin_lock_irq(&fc_pci->irq_lock);
2add87a9	133
64221be7 PB	134	v = fc->read_ibi_reg(fc,irq_20c);
	135
	136	/* errors */
	137	if (v.irq_20c.Data_receiver_error)
	138	deb_chk("data receiver error\n");
	139	if (v.irq_20c.Continuity_error_flag)
	140	deb_chk("Contunuity error flag is set\n");
	141	if (v.irq_20c.LLC_SNAP_FLAG_set)
	142	deb_chk("LLC_SNAP_FLAG_set is set\n");
	143	if (v.irq_20c.Transport_Error)
	144	deb_chk("Transport error\n");
	145
	146	if ((fc_pci->count % 1000) == 0)
	147	deb_chk("%d valid irq took place so far\n",fc_pci->count);
	148
2add87a9 JS	149	if (v.irq_20c.DMA1_IRQ_Status == 1) {
	150	if (fc_pci->active_dma1_addr == 0)
	151	flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr0,fc_pci->dma[0].size / 188);
	152	else
	153	flexcop_pass_dmx_packets(fc_pci->fc_dev,fc_pci->dma[0].cpu_addr1,fc_pci->dma[0].size / 188);
	154
	155	deb_irq("page change to page: %d\n",!fc_pci->active_dma1_addr);
	156	fc_pci->active_dma1_addr = !fc_pci->active_dma1_addr;
	157	} else if (v.irq_20c.DMA1_Timer_Status == 1) {
	158	/* for the timer IRQ we only can use buffer dmx feeding, because we don't have
	159	* complete TS packets when reading from the DMA memory */
	160	dma_addr_t cur_addr =
	161	fc->read_ibi_reg(fc,dma1_008).dma_0x8.dma_cur_addr << 2;
	162	u32 cur_pos = cur_addr - fc_pci->dma[0].dma_addr0;
	163
608268b2 RD	164	deb_irq("%u irq: %08x cur_addr: %llx: cur_pos: %08x, last_cur_pos: %08x ",
	165	jiffies_to_usecs(jiffies - fc_pci->last_irq),
	166	v.raw, (unsigned long long)cur_addr, cur_pos,
	167	fc_pci->last_dma1_cur_pos);
64221be7	168	fc_pci->last_irq = jiffies;
c4ee3fd4	169
2add87a9 JS	170	/* buffer end was reached, restarted from the beginning
	171	* pass the data from last_cur_pos to the buffer end to the demux
	172	*/
	173	if (cur_pos < fc_pci->last_dma1_cur_pos) {
c4ee3fd4	174	deb_irq(" end was reached: passing %d bytes ",(fc_pci->dma[0].size*2 - 1) - fc_pci->last_dma1_cur_pos);
2add87a9 JS	175	flexcop_pass_dmx_data(fc_pci->fc_dev,
2add87a9 JS	176	fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos,
c4ee3fd4	177	(fc_pci->dma[0].size*2) - fc_pci->last_dma1_cur_pos);
2add87a9 JS	178	fc_pci->last_dma1_cur_pos = 0;
	179	}
	180
	181	if (cur_pos > fc_pci->last_dma1_cur_pos) {
c4ee3fd4	182	deb_irq(" passing %d bytes ",cur_pos - fc_pci->last_dma1_cur_pos);
2add87a9 JS	183	flexcop_pass_dmx_data(fc_pci->fc_dev,
	184	fc_pci->dma[0].cpu_addr0 + fc_pci->last_dma1_cur_pos,
	185	cur_pos - fc_pci->last_dma1_cur_pos);
	186	}
c4ee3fd4	187	deb_irq("\n");
2add87a9 JS	188
2add87a9 JS	189	fc_pci->last_dma1_cur_pos = cur_pos;
64221be7 PB	190	fc_pci->count++;
	191	} else {
	192	deb_irq("isr for flexcop called, apparently without reason (%08x)\n",v.raw);
4853f16a	193	ret = IRQ_NONE;
64221be7	194	}
4853f16a JS	195
4853f16a JS	196	spin_unlock_irq(&fc_pci->irq_lock);
2add87a9	197
4853f16a	198	return ret;
2add87a9 JS	199	}
	200
	201	static int flexcop_pci_stream_control(struct flexcop_device *fc, int onoff)
	202	{
	203	struct flexcop_pci *fc_pci = fc->bus_specific;
	204	if (onoff) {
64221be7 PB	205	flexcop_dma_config(fc,&fc_pci->dma[0],FC_DMA_1);
64221be7 PB	206	flexcop_dma_config(fc,&fc_pci->dma[1],FC_DMA_2);
2add87a9	207
64221be7	208	flexcop_dma_config_timer(fc,FC_DMA_1,0);
2add87a9	209
64221be7 PB	210	flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 \| FC_DMA_SUBADDR_1,1);
64221be7 PB	211	deb_irq("DMA xfer enabled\n");
2add87a9	212
64221be7 PB	213	fc_pci->last_dma1_cur_pos = 0;
	214	flexcop_dma_control_timer_irq(fc,FC_DMA_1,1);
	215	deb_irq("IRQ enabled\n");
	216
	217	// fc_pci->active_dma1_addr = 0;
	218	// flexcop_dma_control_size_irq(fc,FC_DMA_1,1);
	219
	220	if (irq_chk_intv > 0)
	221	schedule_delayed_work(&fc_pci->irq_check_work,
	222	msecs_to_jiffies(irq_chk_intv < 100 ? 100 : irq_chk_intv));
2add87a9	223	} else {
64221be7 PB	224	if (irq_chk_intv > 0)
	225	cancel_delayed_work(&fc_pci->irq_check_work);
	226
	227	flexcop_dma_control_timer_irq(fc,FC_DMA_1,0);
	228	deb_irq("IRQ disabled\n");
2add87a9	229
64221be7 PB	230	// flexcop_dma_control_size_irq(fc,FC_DMA_1,0);
	231
	232	flexcop_dma_xfer_control(fc,FC_DMA_1,FC_DMA_SUBADDR_0 \| FC_DMA_SUBADDR_1,0);
	233	deb_irq("DMA xfer disabled\n");
2add87a9 JS	234	}
	235
	236	return 0;
	237	}
	238
	239	static int flexcop_pci_dma_init(struct flexcop_pci *fc_pci)
	240	{
	241	int ret;
	242	if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[0],FC_DEFAULT_DMA1_BUFSIZE)) != 0)
	243	return ret;
	244
8397703e TP	245	if ((ret = flexcop_dma_allocate(fc_pci->pdev,&fc_pci->dma[1],FC_DEFAULT_DMA2_BUFSIZE)) != 0) {
	246	flexcop_dma_free(&fc_pci->dma[0]);
	247	return ret;
	248	}
2add87a9 JS	249
	250	flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_MEDIA \| FC_SRAM_DEST_NET, FC_SRAM_DEST_TARGET_DMA1);
	251	flexcop_sram_set_dest(fc_pci->fc_dev,FC_SRAM_DEST_CAO \| FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_DMA2);
	252
	253	fc_pci->init_state \|= FC_PCI_DMA_INIT;
64221be7	254
2add87a9 JS	255	return ret;
	256	}
	257
	258	static void flexcop_pci_dma_exit(struct flexcop_pci *fc_pci)
	259	{
	260	if (fc_pci->init_state & FC_PCI_DMA_INIT) {
	261	flexcop_dma_free(&fc_pci->dma[0]);
	262	flexcop_dma_free(&fc_pci->dma[1]);
	263	}
	264	fc_pci->init_state &= ~FC_PCI_DMA_INIT;
	265	}
	266
	267	static int flexcop_pci_init(struct flexcop_pci *fc_pci)
	268	{
	269	int ret;
	270	u8 card_rev;
	271
	272	pci_read_config_byte(fc_pci->pdev, PCI_CLASS_REVISION, &card_rev);
	273	info("card revision %x", card_rev);
	274
	275	if ((ret = pci_enable_device(fc_pci->pdev)) != 0)
	276	return ret;
	277
	278	pci_set_master(fc_pci->pdev);
	279
	280	/* enable interrupts */
	281	// pci_write_config_dword(pdev, 0x6c, 0x8000);
	282
	283	if ((ret = pci_request_regions(fc_pci->pdev, DRIVER_NAME)) != 0)
	284	goto err_pci_disable_device;
	285
	286	fc_pci->io_mem = pci_iomap(fc_pci->pdev, 0, 0x800);
	287
	288	if (!fc_pci->io_mem) {
	289	err("cannot map io memory\n");
	290	ret = -EIO;
	291	goto err_pci_release_regions;
	292	}
	293
	294	pci_set_drvdata(fc_pci->pdev, fc_pci);
	295
64221be7	296	if ((ret = request_irq(fc_pci->pdev->irq, flexcop_pci_isr,
8076fe32	297	IRQF_SHARED, DRIVER_NAME, fc_pci)) != 0)
2add87a9 JS	298	goto err_pci_iounmap;
2add87a9 JS	299
4853f16a JS	300	spin_lock_init(&fc_pci->irq_lock);
4853f16a JS	301
2add87a9	302	fc_pci->init_state \|= FC_PCI_INIT;
8397703e	303	return ret;
2add87a9 JS	304
	305	err_pci_iounmap:
	306	pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
	307	pci_set_drvdata(fc_pci->pdev, NULL);
	308	err_pci_release_regions:
	309	pci_release_regions(fc_pci->pdev);
	310	err_pci_disable_device:
	311	pci_disable_device(fc_pci->pdev);
2add87a9 JS	312	return ret;
	313	}
	314
	315	static void flexcop_pci_exit(struct flexcop_pci *fc_pci)
	316	{
	317	if (fc_pci->init_state & FC_PCI_INIT) {
	318	free_irq(fc_pci->pdev->irq, fc_pci);
	319	pci_iounmap(fc_pci->pdev, fc_pci->io_mem);
	320	pci_set_drvdata(fc_pci->pdev, NULL);
	321	pci_release_regions(fc_pci->pdev);
	322	pci_disable_device(fc_pci->pdev);
	323	}
	324	fc_pci->init_state &= ~FC_PCI_INIT;
	325	}
	326
	327
	328	static int flexcop_pci_probe(struct pci_dev pdev, const struct pci_device_id ent)
	329	{
	330	struct flexcop_device *fc;
	331	struct flexcop_pci *fc_pci;
	332	int ret = -ENOMEM;
	333
	334	if ((fc = flexcop_device_kmalloc(sizeof(struct flexcop_pci))) == NULL) {
	335	err("out of memory\n");
	336	return -ENOMEM;
	337	}
	338
	339	/* general flexcop init */
	340	fc_pci = fc->bus_specific;
	341	fc_pci->fc_dev = fc;
	342
	343	fc->read_ibi_reg = flexcop_pci_read_ibi_reg;
	344	fc->write_ibi_reg = flexcop_pci_write_ibi_reg;
	345	fc->i2c_request = flexcop_i2c_request;
	346	fc->get_mac_addr = flexcop_eeprom_check_mac_addr;
	347
	348	fc->stream_control = flexcop_pci_stream_control;
	349
c4ee3fd4 JS	350	if (enable_pid_filtering)
	351	info("will use the HW PID filter.");
	352	else
	353	info("will pass the complete TS to the demuxer.");
	354
2add87a9 JS	355	fc->pid_filtering = enable_pid_filtering;
	356	fc->bus_type = FC_PCI;
	357
	358	fc->dev = &pdev->dev;
59a7ad6c	359	fc->owner = THIS_MODULE;
2add87a9 JS	360
	361	/* bus specific part */
	362	fc_pci->pdev = pdev;
	363	if ((ret = flexcop_pci_init(fc_pci)) != 0)
	364	goto err_kfree;
	365
	366	/* init flexcop */
	367	if ((ret = flexcop_device_initialize(fc)) != 0)
	368	goto err_pci_exit;
	369
	370	/* init dma */
	371	if ((ret = flexcop_pci_dma_init(fc_pci)) != 0)
	372	goto err_fc_exit;
	373
64221be7 PB	374	INIT_WORK(&fc_pci->irq_check_work, flexcop_pci_irq_check_work, fc_pci);
64221be7 PB	375
8397703e TP	376	return ret;
8397703e TP	377
2add87a9 JS	378	err_fc_exit:
	379	flexcop_device_exit(fc);
	380	err_pci_exit:
	381	flexcop_pci_exit(fc_pci);
	382	err_kfree:
	383	flexcop_device_kfree(fc);
2add87a9 JS	384	return ret;
	385	}
	386
	387	/* in theory every _exit function should be called exactly two times,
	388	* here and in the bail-out-part of the _init-function
	389	*/
	390	static void flexcop_pci_remove(struct pci_dev *pdev)
	391	{
	392	struct flexcop_pci *fc_pci = pci_get_drvdata(pdev);
	393
	394	flexcop_pci_dma_exit(fc_pci);
	395	flexcop_device_exit(fc_pci->fc_dev);
	396	flexcop_pci_exit(fc_pci);
	397	flexcop_device_kfree(fc_pci->fc_dev);
	398	}
	399
	400	static struct pci_device_id flexcop_pci_tbl[] = {
	401	{ PCI_DEVICE(0x13d0, 0x2103) },
64221be7	402	/* { PCI_DEVICE(0x13d0, 0x2200) }, ? */
2add87a9 JS	403	{ },
	404	};
	405
	406	MODULE_DEVICE_TABLE(pci, flexcop_pci_tbl);
	407
	408	static struct pci_driver flexcop_pci_driver = {
63b5c1c4	409	.name = "b2c2_flexcop_pci",
2add87a9	410	.id_table = flexcop_pci_tbl,
64221be7 PB	411	.probe = flexcop_pci_probe,
64221be7 PB	412	.remove = flexcop_pci_remove,
2add87a9 JS	413	};
	414
	415	static int __init flexcop_pci_module_init(void)
	416	{
	417	return pci_register_driver(&flexcop_pci_driver);
	418	}
	419
	420	static void __exit flexcop_pci_module_exit(void)
	421	{
	422	pci_unregister_driver(&flexcop_pci_driver);
	423	}
	424
	425	module_init(flexcop_pci_module_init);
	426	module_exit(flexcop_pci_module_exit);
	427
	428	MODULE_AUTHOR(DRIVER_AUTHOR);
	429	MODULE_DESCRIPTION(DRIVER_NAME);
	430	MODULE_LICENSE("GPL");