/* * 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: %08x: cur_pos: %08x, last_cur_pos: %08x ",				jiffies_to_usecs(jiffies - fc_pci->last_irq),v.raw,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)		goto dma1_free;	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;	goto success;dma1_free:	flexcop_dma_free(&fc_pci->dma[0]);success:	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,					SA_SHIRQ, DRIVER_NAME, fc_pci)) != 0)		goto err_pci_iounmap;	spin_lock_init(&fc_pci->irq_lock);	fc_pci->init_state |= FC_PCI_INIT;	goto success;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);success:	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);	goto success;err_fc_exit:	flexcop_device_exit(fc);err_pci_exit:	flexcop_pci_exit(fc_pci);err_kfree:	flexcop_device_kfree(fc);success:	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");