drivers/media/dvb/b2c2/flexcop-usb.c - kernel/msm-4.19 - Gitiles

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

 #define FC_LOG_PREFIX "flexcop_usb"
 #include "flexcop-usb.h"
 #include "flexcop-common.h"

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

 /* debug */
 #ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
 #define dprintk(level,args...) \
 	    do { if ((debug & level)) { printk(args); } } while (0)
 #define debug_dump(b,l,method) {\
 	int i; \
 	for (i = 0; i < l; i++) method("%02x ", b[i]); \
 	method("\n");\
 }

 #define DEBSTATUS ""
 #else
 #define dprintk(level,args...)
 #define debug_dump(b,l,method)
 #define DEBSTATUS " (debugging is not enabled)"
 #endif

 static int debug;
 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "set debugging level (1=info,ts=2,ctrl=4,i2c=8,v8mem=16 (or-able))." DEBSTATUS);
 #undef DEBSTATUS

 #define deb_info(args...) dprintk(0x01,args)
 #define deb_ts(args...)   dprintk(0x02,args)
 #define deb_ctrl(args...) dprintk(0x04,args)
 #define deb_i2c(args...)  dprintk(0x08,args)
 #define deb_v8(args...)   dprintk(0x10,args)

 /* JLP 111700: we will include the 1 bit gap between the upper and lower 3 bits
  * in the IBI address, to make the V8 code simpler.
  * PCI ADDRESS FORMAT: 0x71C -> 0000 0111 0001 1100 (these are the six bits used)
  *                  in general: 0000 0HHH 000L LL00
  * IBI ADDRESS FORMAT:                    RHHH BLLL
  *
  * where R is the read(1)/write(0) bit, B is the busy bit
  * and HHH and LLL are the two sets of three bits from the PCI address.
  */
 #define B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(usPCI) (u8) (((usPCI >> 2) & 0x07) + ((usPCI >> 4) & 0x70))
 #define B2C2_FLEX_INTERNALADDR_TO_PCIOFFSET(ucAddr) (u16) (((ucAddr & 0x07) << 2) + ((ucAddr & 0x70) << 4))

 /*
  * DKT 020228
  * - forget about this VENDOR_BUFFER_SIZE, read and write register
  *   deal with DWORD or 4 bytes, that should be should from now on
  * - from now on, we don't support anything older than firm 1.00
  *   I eliminated the write register as a 2 trip of writing hi word and lo word
  *   and force this to write only 4 bytes at a time.
  *   NOTE: this should work with all the firmware from 1.00 and newer
  */
 static int flexcop_usb_readwrite_dw(struct flexcop_device *fc, u16 wRegOffsPCI, u32 *val, u8 read)
 {
 	struct flexcop_usb *fc_usb = fc->bus_specific;
 	u8 request = read ? B2C2_USB_READ_REG : B2C2_USB_WRITE_REG;
 	u8 request_type = (read ? USB_DIR_IN : USB_DIR_OUT) | USB_TYPE_VENDOR;
 	u8 wAddress = B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(wRegOffsPCI) | (read ? 0x80 : 0);

 	int len = usb_control_msg(fc_usb->udev,
 			read ? B2C2_USB_CTRL_PIPE_IN : B2C2_USB_CTRL_PIPE_OUT,
 			request,
 			request_type,  /* 0xc0 read or 0x40 write*/
 			wAddress,
 			0,
 			val,
 			sizeof(u32),
 			B2C2_WAIT_FOR_OPERATION_RDW * HZ);

 	if (len != sizeof(u32)) {
 		err("error while %s dword from %d (%d).",read ? "reading" : "writing",
 			wAddress,wRegOffsPCI);
 		return -EIO;
 	}
 	return 0;
 }

 /*
  * DKT 010817 - add support for V8 memory read/write and flash update
  */
 static int flexcop_usb_v8_memory_req(struct flexcop_usb *fc_usb,
 		flexcop_usb_request_t req, u8 page, u16 wAddress,
 		u8 *pbBuffer,u32 buflen)
 {
 //	u8 dwRequestType;
 	u8 request_type = USB_TYPE_VENDOR;
 	u16 wIndex;
 	int nWaitTime,pipe,len;

 	wIndex = page << 8;

 	switch (req) {
 		case B2C2_USB_READ_V8_MEM:
 			nWaitTime = B2C2_WAIT_FOR_OPERATION_V8READ;
 			request_type |= USB_DIR_IN;
 //			dwRequestType = (u8) RTYPE_READ_V8_MEMORY;
 			pipe = B2C2_USB_CTRL_PIPE_IN;
 		break;
 		case B2C2_USB_WRITE_V8_MEM:
 			wIndex |= pbBuffer[0];
 			request_type |= USB_DIR_OUT;
 			nWaitTime = B2C2_WAIT_FOR_OPERATION_V8WRITE;
 //			dwRequestType = (u8) RTYPE_WRITE_V8_MEMORY;
 			pipe = B2C2_USB_CTRL_PIPE_OUT;
 		break;
 		case B2C2_USB_FLASH_BLOCK:
 			request_type |= USB_DIR_OUT;
 			nWaitTime = B2C2_WAIT_FOR_OPERATION_V8FLASH;
 //			dwRequestType = (u8) RTYPE_WRITE_V8_FLASH;
 			pipe = B2C2_USB_CTRL_PIPE_OUT;
 		break;
 		default:
 			deb_info("unsupported request for v8_mem_req %x.\n",req);
 		return -EINVAL;
 	}
 	deb_v8("v8mem: %02x %02x %04x %04x, len: %d\n",request_type,req,
 			wAddress,wIndex,buflen);

 	len = usb_control_msg(fc_usb->udev,pipe,
 			req,
 			request_type,
 			wAddress,
 			wIndex,
 			pbBuffer,
 			buflen,
 			nWaitTime * HZ);

 	debug_dump(pbBuffer,len,deb_v8);

 	return len == buflen ? 0 : -EIO;
 }

 #define bytes_left_to_read_on_page(paddr,buflen) \
 			((V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)) > buflen \
 			? buflen : (V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)))

 static int flexcop_usb_memory_req(struct flexcop_usb *fc_usb,flexcop_usb_request_t req,
 		flexcop_usb_mem_page_t page_start, u32 addr, int extended, u8 *buf, u32 len)
 {
 	int i,ret = 0;
 	u16 wMax;
 	u32 pagechunk = 0;

 	switch(req) {
 		case B2C2_USB_READ_V8_MEM:  wMax = USB_MEM_READ_MAX; break;
 		case B2C2_USB_WRITE_V8_MEM:	wMax = USB_MEM_WRITE_MAX; break;
 		case B2C2_USB_FLASH_BLOCK:  wMax = USB_FLASH_MAX; break;
 		default:
 			return -EINVAL;
 		break;
 	}
 	for (i = 0; i < len;) {
 		pagechunk = wMax < bytes_left_to_read_on_page(addr,len) ? wMax : bytes_left_to_read_on_page(addr,len);
 		deb_info("%x\n",(addr & V8_MEMORY_PAGE_MASK) | (V8_MEMORY_EXTENDED*extended));
 		if ((ret = flexcop_usb_v8_memory_req(fc_usb,req,
 				page_start + (addr / V8_MEMORY_PAGE_SIZE), /* actual page */
 				(addr & V8_MEMORY_PAGE_MASK) | (V8_MEMORY_EXTENDED*extended),
 				&buf[i],pagechunk)) < 0)
 			return ret;

 		addr += pagechunk;
 		len -= pagechunk;
 	}
 	return 0;
 }

 static int flexcop_usb_get_mac_addr(struct flexcop_device *fc, int extended)
 {
 	return flexcop_usb_memory_req(fc->bus_specific,B2C2_USB_READ_V8_MEM,
 			V8_MEMORY_PAGE_FLASH,0x1f010,1,fc->dvb_adapter.proposed_mac,6);
 }

 #if 0
 static int flexcop_usb_utility_req(struct flexcop_usb *fc_usb, int set,
 		flexcop_usb_utility_function_t func, u8 extra, u16 wIndex,
 		u16 buflen, u8 *pvBuffer)
 {
 	u16 wValue;
 	u8 request_type = (set ? USB_DIR_OUT : USB_DIR_IN) | USB_TYPE_VENDOR;
 //	u8 dwRequestType = (u8) RTYPE_GENERIC,
 	int nWaitTime = 2,
 		pipe = set ? B2C2_USB_CTRL_PIPE_OUT : B2C2_USB_CTRL_PIPE_IN,
 		len;

 	wValue = (func << 8) | extra;

 	len = usb_control_msg(fc_usb->udev,pipe,
 			B2C2_USB_UTILITY,
 			request_type,
 			wValue,
 			wIndex,
 			pvBuffer,
 			buflen,
 			nWaitTime * HZ);
 	return len == buflen ? 0 : -EIO;
 }
 #endif

 /* usb i2c stuff */
 static int flexcop_usb_i2c_req(struct flexcop_usb *fc_usb,
 		flexcop_usb_request_t req, flexcop_usb_i2c_function_t func,
 		flexcop_i2c_port_t port, u8 chipaddr, u8 addr, u8 *buf, u8 buflen)
 {
 	u16 wValue, wIndex;
 	int nWaitTime,pipe,len;
 //	u8 dwRequestType;
 	u8 request_type = USB_TYPE_VENDOR;

 	switch (func) {
 		case USB_FUNC_I2C_WRITE:
 		case USB_FUNC_I2C_MULTIWRITE:
 		case USB_FUNC_I2C_REPEATWRITE:
 		/* DKT 020208 - add this to support special case of DiSEqC */
 		case USB_FUNC_I2C_CHECKWRITE:
 			pipe = B2C2_USB_CTRL_PIPE_OUT;
 			nWaitTime = 2;
 //			dwRequestType = (u8) RTYPE_GENERIC;
 			request_type |= USB_DIR_OUT;
 		break;
 		case USB_FUNC_I2C_READ:
 		case USB_FUNC_I2C_REPEATREAD:
 			pipe = B2C2_USB_CTRL_PIPE_IN;
 			nWaitTime = 2;
 //			dwRequestType = (u8) RTYPE_GENERIC;
 			request_type |= USB_DIR_IN;
 		break;
 		default:
 			deb_info("unsupported function for i2c_req %x\n",func);
 			return -EINVAL;
 	}
 	wValue = (func << 8 ) | (port << 4);
 	wIndex = (chipaddr << 8 ) | addr;

 	deb_i2c("i2c %2d: %02x %02x %02x %02x %02x %02x\n",func,request_type,req,
 			((wValue && 0xff) << 8),wValue >> 8,((wIndex && 0xff) << 8),wIndex >> 8);

 	len = usb_control_msg(fc_usb->udev,pipe,
 			req,
 			request_type,
 			wValue,
 			wIndex,
 			buf,
 			buflen,
 			nWaitTime * HZ);

 	return len == buflen ? 0 : -EREMOTEIO;
 }

 /* actual bus specific access functions, make sure prototype are/will be equal to pci */
 static flexcop_ibi_value flexcop_usb_read_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register reg)
 {
 	flexcop_ibi_value val;
 	val.raw = 0;
 	flexcop_usb_readwrite_dw(fc,reg, &val.raw, 1);
 	return val;
 }

 static int flexcop_usb_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register reg, flexcop_ibi_value val)
 {
 	return flexcop_usb_readwrite_dw(fc,reg, &val.raw, 0);
 }

 static int flexcop_usb_i2c_request(struct flexcop_device *fc, flexcop_access_op_t op,
 		flexcop_i2c_port_t port, u8 chipaddr, u8 addr, u8 *buf, u16 len)
 {
 	if (op == FC_READ)
 		return flexcop_usb_i2c_req(fc->bus_specific,B2C2_USB_I2C_REQUEST,USB_FUNC_I2C_READ,port,chipaddr,addr,buf,len);
 	else
 		return flexcop_usb_i2c_req(fc->bus_specific,B2C2_USB_I2C_REQUEST,USB_FUNC_I2C_WRITE,port,chipaddr,addr,buf,len);
 }

 static void flexcop_usb_process_frame(struct flexcop_usb *fc_usb, u8 *buffer, int buffer_length)
 {
 	u8 *b;
 	int l;

 	deb_ts("tmp_buffer_length=%d, buffer_length=%d\n", fc_usb->tmp_buffer_length, buffer_length);

 	if (fc_usb->tmp_buffer_length > 0) {
 		memcpy(fc_usb->tmp_buffer+fc_usb->tmp_buffer_length, buffer, buffer_length);
 		fc_usb->tmp_buffer_length += buffer_length;
 		b = fc_usb->tmp_buffer;
 		l = fc_usb->tmp_buffer_length;
 	} else {
 		b=buffer;
 		l=buffer_length;
 	}

 	while (l >= 190) {
 		if (*b == 0xff)
 			switch (*(b+1) & 0x03) {
 				case 0x01: /* media packet */
 					if ( *(b+2) == 0x47 )
 						flexcop_pass_dmx_packets(fc_usb->fc_dev, b+2, 1);
 					else
 						deb_ts("not ts packet %02x %02x %02x %02x \n", *(b+2), *(b+3), *(b+4), *(b+5) );

 					b += 190;
 					l -= 190;
 				break;
 				default:
 					deb_ts("wrong packet type\n");
 					l = 0;
 				break;
 			}
 		else {
 			deb_ts("wrong header\n");
 			l = 0;
 		}
 	}

 	if (l>0)
 		memcpy(fc_usb->tmp_buffer, b, l);
 	fc_usb->tmp_buffer_length = l;
 }

 static void flexcop_usb_urb_complete(struct urb *urb, struct pt_regs *ptregs)
 {
 	struct flexcop_usb *fc_usb = urb->context;
 	int i;

 	if (urb->actual_length > 0)
 		deb_ts("urb completed, bufsize: %d actlen; %d\n",urb->transfer_buffer_length, urb->actual_length);

 	for (i = 0; i < urb->number_of_packets; i++) {
 		if (urb->iso_frame_desc[i].status < 0) {
 			err("iso frame descriptor %d has an error: %d\n",i,urb->iso_frame_desc[i].status);
 		} else
 			if (urb->iso_frame_desc[i].actual_length > 0) {
 				deb_ts("passed %d bytes to the demux\n",urb->iso_frame_desc[i].actual_length);

 				flexcop_usb_process_frame(fc_usb,
 					urb->transfer_buffer + urb->iso_frame_desc[i].offset,
 					urb->iso_frame_desc[i].actual_length);
 		}
 		urb->iso_frame_desc[i].status = 0;
 		urb->iso_frame_desc[i].actual_length = 0;
 	}

 	usb_submit_urb(urb,GFP_ATOMIC);
 }

 static int flexcop_usb_stream_control(struct flexcop_device *fc, int onoff)
 {
 	/* submit/kill iso packets */
 	return 0;
 }

 static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
 {
 	int i;
 	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
 		if (fc_usb->iso_urb[i] != NULL) {
 			deb_ts("unlinking/killing urb no. %d\n",i);
 			usb_kill_urb(fc_usb->iso_urb[i]);
 			usb_free_urb(fc_usb->iso_urb[i]);
 		}

 	if (fc_usb->iso_buffer != NULL)
 		pci_free_consistent(NULL,fc_usb->buffer_size, fc_usb->iso_buffer, fc_usb->dma_addr);
 }

 static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
 {
 	u16 frame_size = fc_usb->uintf->cur_altsetting->endpoint[0].desc.wMaxPacketSize;
 	int bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO * frame_size,i,j,ret;
 	int buffer_offset = 0;

 	deb_ts("creating %d iso-urbs with %d frames each of %d bytes size = %d.\n",
 			B2C2_USB_NUM_ISO_URB, B2C2_USB_FRAMES_PER_ISO, frame_size,bufsize);

 	fc_usb->iso_buffer = pci_alloc_consistent(NULL,bufsize,&fc_usb->dma_addr);
 	if (fc_usb->iso_buffer == NULL)
 		return -ENOMEM;
 	memset(fc_usb->iso_buffer, 0, bufsize);
 	fc_usb->buffer_size = bufsize;

 	/* creating iso urbs */
 	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
 		if (!(fc_usb->iso_urb[i] = usb_alloc_urb(B2C2_USB_FRAMES_PER_ISO,GFP_ATOMIC))) {
 			ret = -ENOMEM;
 			goto urb_error;
 		}
 	/* initialising and submitting iso urbs */
 	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
 		int frame_offset = 0;
 		struct urb *urb = fc_usb->iso_urb[i];
 		deb_ts("initializing and submitting urb no. %d (buf_offset: %d).\n",i,buffer_offset);

 		urb->dev = fc_usb->udev;
 		urb->context = fc_usb;
 		urb->complete = flexcop_usb_urb_complete;
 		urb->pipe = B2C2_USB_DATA_PIPE;
 		urb->transfer_flags = URB_ISO_ASAP;
 		urb->interval = 1;
 		urb->number_of_packets = B2C2_USB_FRAMES_PER_ISO;
 		urb->transfer_buffer_length = frame_size * B2C2_USB_FRAMES_PER_ISO;
 		urb->transfer_buffer = fc_usb->iso_buffer + buffer_offset;

 		buffer_offset += frame_size * B2C2_USB_FRAMES_PER_ISO;
 		for (j = 0; j < B2C2_USB_FRAMES_PER_ISO; j++) {
 			deb_ts("urb no: %d, frame: %d, frame_offset: %d\n",i,j,frame_offset);
 			urb->iso_frame_desc[j].offset = frame_offset;
 			urb->iso_frame_desc[j].length = frame_size;
 			frame_offset += frame_size;
 		}

 		if ((ret = usb_submit_urb(fc_usb->iso_urb[i],GFP_ATOMIC))) {
 			err("submitting urb %d failed with %d.",i,ret);
 			goto urb_error;
 		}
 		deb_ts("submitted urb no. %d.\n",i);
 	}

 /* SRAM */

 	flexcop_sram_set_dest(fc_usb->fc_dev,FC_SRAM_DEST_MEDIA | FC_SRAM_DEST_NET |
 			FC_SRAM_DEST_CAO | FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_WAN_USB);
 	flexcop_wan_set_speed(fc_usb->fc_dev,FC_WAN_SPEED_8MBITS);
 	flexcop_sram_ctrl(fc_usb->fc_dev,1,1,1);

 	ret = 0;
 	goto success;
 urb_error:
 	flexcop_usb_transfer_exit(fc_usb);
 success:
 	return ret;
 }

 static int flexcop_usb_init(struct flexcop_usb *fc_usb)
 {
 	/* use the alternate setting with the larges buffer */
 	usb_set_interface(fc_usb->udev,0,1);
 	switch (fc_usb->udev->speed) {
 		case USB_SPEED_LOW:
 			err("cannot handle USB speed because it is to sLOW.");
 			return -ENODEV;
 			break;
 		case USB_SPEED_FULL:
 			info("running at FULL speed.");
 			break;
 		case USB_SPEED_HIGH:
 			info("running at HIGH speed.");
 			break;
 		case USB_SPEED_UNKNOWN: /* fall through */
 		default:
 			err("cannot handle USB speed because it is unkown.");
 			return -ENODEV;
 	}
 	usb_set_intfdata(fc_usb->uintf, fc_usb);
 	return 0;
 }

 static void flexcop_usb_exit(struct flexcop_usb *fc_usb)
 {
 	usb_set_intfdata(fc_usb->uintf, NULL);
 }

 static int flexcop_usb_probe(struct usb_interface *intf,
 		const struct usb_device_id *id)
 {
 	struct usb_device *udev = interface_to_usbdev(intf);
 	struct flexcop_usb *fc_usb = NULL;
 	struct flexcop_device *fc = NULL;
 	int ret;

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

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

 	fc->read_ibi_reg  = flexcop_usb_read_ibi_reg;
 	fc->write_ibi_reg = flexcop_usb_write_ibi_reg;
 	fc->i2c_request = flexcop_usb_i2c_request;
 	fc->get_mac_addr = flexcop_usb_get_mac_addr;

 	fc->stream_control = flexcop_usb_stream_control;

 	fc->pid_filtering = 1;
 	fc->bus_type = FC_USB;

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

 /* bus specific part */
 	fc_usb->udev = udev;
 	fc_usb->uintf = intf;
 	if ((ret = flexcop_usb_init(fc_usb)) != 0)
 		goto err_kfree;

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

 /* xfer init */
 	if ((ret = flexcop_usb_transfer_init(fc_usb)) != 0)
 		goto err_fc_exit;

 	info("%s successfully initialized and connected.",DRIVER_NAME);
 	ret = 0;
 	goto success;
 err_fc_exit:
 	flexcop_device_exit(fc);
 err_usb_exit:
 	flexcop_usb_exit(fc_usb);
 err_kfree:
 	flexcop_device_kfree(fc);
 success:
 	return ret;
 }

 static void flexcop_usb_disconnect(struct usb_interface *intf)
 {
 	struct flexcop_usb *fc_usb = usb_get_intfdata(intf);
 	flexcop_usb_transfer_exit(fc_usb);
 	flexcop_device_exit(fc_usb->fc_dev);
 	flexcop_usb_exit(fc_usb);
 	flexcop_device_kfree(fc_usb->fc_dev);
 	info("%s successfully deinitialized and disconnected.",DRIVER_NAME);
 }

 static struct usb_device_id flexcop_usb_table [] = {
 	    { USB_DEVICE(0x0af7, 0x0101) },
 	    { }
 };

 /* usb specific object needed to register this driver with the usb subsystem */
 static struct usb_driver flexcop_usb_driver = {
 	.owner		= THIS_MODULE,
 	.name		= "b2c2_flexcop_usb",
 	.probe		= flexcop_usb_probe,
 	.disconnect = flexcop_usb_disconnect,
 	.id_table	= flexcop_usb_table,
 };

 /* module stuff */
 static int __init flexcop_usb_module_init(void)
 {
 	int result;
 	if ((result = usb_register(&flexcop_usb_driver))) {
 		err("usb_register failed. (%d)",result);
 		return result;
 	}

 	return 0;
 }

 static void __exit flexcop_usb_module_exit(void)
 {
 	/* deregister this driver from the USB subsystem */
 	usb_deregister(&flexcop_usb_driver);
 }

 module_init(flexcop_usb_module_init);
 module_exit(flexcop_usb_module_exit);

 MODULE_AUTHOR(DRIVER_AUTHOR);
 MODULE_DESCRIPTION(DRIVER_NAME);
 MODULE_LICENSE("GPL");
	/*
	* This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
	*
	* flexcop-usb.c - covers the USB part.
	*
	* see flexcop.c for copyright information.
	*/

	#define FC_LOG_PREFIX "flexcop_usb"
	#include "flexcop-usb.h"
	#include "flexcop-common.h"

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

	/* debug */
	#ifdef CONFIG_DVB_B2C2_FLEXCOP_DEBUG
	#define dprintk(level,args...) \
	do { if ((debug & level)) { printk(args); } } while (0)
	#define debug_dump(b,l,method) {\
	int i; \
	for (i = 0; i < l; i++) method("%02x ", b[i]); \
	method("\n");\
	}

	#define DEBSTATUS ""
	#else
	#define dprintk(level,args...)
	#define debug_dump(b,l,method)
	#define DEBSTATUS " (debugging is not enabled)"
	#endif

	static int debug;
	module_param(debug, int, 0644);
	MODULE_PARM_DESC(debug, "set debugging level (1=info,ts=2,ctrl=4,i2c=8,v8mem=16 (or-able))." DEBSTATUS);
	#undef DEBSTATUS

	#define deb_info(args...) dprintk(0x01,args)
	#define deb_ts(args...) dprintk(0x02,args)
	#define deb_ctrl(args...) dprintk(0x04,args)
	#define deb_i2c(args...) dprintk(0x08,args)
	#define deb_v8(args...) dprintk(0x10,args)

	/* JLP 111700: we will include the 1 bit gap between the upper and lower 3 bits
	* in the IBI address, to make the V8 code simpler.
	* PCI ADDRESS FORMAT: 0x71C -> 0000 0111 0001 1100 (these are the six bits used)
	* in general: 0000 0HHH 000L LL00
	* IBI ADDRESS FORMAT: RHHH BLLL
	*
	* where R is the read(1)/write(0) bit, B is the busy bit
	* and HHH and LLL are the two sets of three bits from the PCI address.
	*/
	#define B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(usPCI) (u8) (((usPCI >> 2) & 0x07) + ((usPCI >> 4) & 0x70))
	#define B2C2_FLEX_INTERNALADDR_TO_PCIOFFSET(ucAddr) (u16) (((ucAddr & 0x07) << 2) + ((ucAddr & 0x70) << 4))

	/*
	* DKT 020228
	* - forget about this VENDOR_BUFFER_SIZE, read and write register
	* deal with DWORD or 4 bytes, that should be should from now on
	* - from now on, we don't support anything older than firm 1.00
	* I eliminated the write register as a 2 trip of writing hi word and lo word
	* and force this to write only 4 bytes at a time.
	* NOTE: this should work with all the firmware from 1.00 and newer
	*/
	static int flexcop_usb_readwrite_dw(struct flexcop_device fc, u16 wRegOffsPCI, u32 val, u8 read)
	{
	struct flexcop_usb *fc_usb = fc->bus_specific;
	u8 request = read ? B2C2_USB_READ_REG : B2C2_USB_WRITE_REG;
	u8 request_type = (read ? USB_DIR_IN : USB_DIR_OUT) \| USB_TYPE_VENDOR;
	u8 wAddress = B2C2_FLEX_PCIOFFSET_TO_INTERNALADDR(wRegOffsPCI) \| (read ? 0x80 : 0);

	int len = usb_control_msg(fc_usb->udev,
	read ? B2C2_USB_CTRL_PIPE_IN : B2C2_USB_CTRL_PIPE_OUT,
	request,
	request_type, /* 0xc0 read or 0x40 write*/
	wAddress,
	0,
	val,
	sizeof(u32),
	B2C2_WAIT_FOR_OPERATION_RDW * HZ);

	if (len != sizeof(u32)) {
	err("error while %s dword from %d (%d).",read ? "reading" : "writing",
	wAddress,wRegOffsPCI);
	return -EIO;
	}
	return 0;
	}

	/*
	* DKT 010817 - add support for V8 memory read/write and flash update
	*/
	static int flexcop_usb_v8_memory_req(struct flexcop_usb *fc_usb,
	flexcop_usb_request_t req, u8 page, u16 wAddress,
	u8 *pbBuffer,u32 buflen)
	{
	// u8 dwRequestType;
	u8 request_type = USB_TYPE_VENDOR;
	u16 wIndex;
	int nWaitTime,pipe,len;

	wIndex = page << 8;

	switch (req) {
	case B2C2_USB_READ_V8_MEM:
	nWaitTime = B2C2_WAIT_FOR_OPERATION_V8READ;
	request_type \|= USB_DIR_IN;
	// dwRequestType = (u8) RTYPE_READ_V8_MEMORY;
	pipe = B2C2_USB_CTRL_PIPE_IN;
	break;
	case B2C2_USB_WRITE_V8_MEM:
	wIndex \|= pbBuffer[0];
	request_type \|= USB_DIR_OUT;
	nWaitTime = B2C2_WAIT_FOR_OPERATION_V8WRITE;
	// dwRequestType = (u8) RTYPE_WRITE_V8_MEMORY;
	pipe = B2C2_USB_CTRL_PIPE_OUT;
	break;
	case B2C2_USB_FLASH_BLOCK:
	request_type \|= USB_DIR_OUT;
	nWaitTime = B2C2_WAIT_FOR_OPERATION_V8FLASH;
	// dwRequestType = (u8) RTYPE_WRITE_V8_FLASH;
	pipe = B2C2_USB_CTRL_PIPE_OUT;
	break;
	default:
	deb_info("unsupported request for v8_mem_req %x.\n",req);
	return -EINVAL;
	}
	deb_v8("v8mem: %02x %02x %04x %04x, len: %d\n",request_type,req,
	wAddress,wIndex,buflen);

	len = usb_control_msg(fc_usb->udev,pipe,
	req,
	request_type,
	wAddress,
	wIndex,
	pbBuffer,
	buflen,
	nWaitTime * HZ);

	debug_dump(pbBuffer,len,deb_v8);

	return len == buflen ? 0 : -EIO;
	}

	#define bytes_left_to_read_on_page(paddr,buflen) \
	((V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)) > buflen \
	? buflen : (V8_MEMORY_PAGE_SIZE - (paddr & V8_MEMORY_PAGE_MASK)))

	static int flexcop_usb_memory_req(struct flexcop_usb *fc_usb,flexcop_usb_request_t req,
	flexcop_usb_mem_page_t page_start, u32 addr, int extended, u8 *buf, u32 len)
	{
	int i,ret = 0;
	u16 wMax;
	u32 pagechunk = 0;

	switch(req) {
	case B2C2_USB_READ_V8_MEM: wMax = USB_MEM_READ_MAX; break;
	case B2C2_USB_WRITE_V8_MEM: wMax = USB_MEM_WRITE_MAX; break;
	case B2C2_USB_FLASH_BLOCK: wMax = USB_FLASH_MAX; break;
	default:
	return -EINVAL;
	break;
	}
	for (i = 0; i < len;) {
	pagechunk = wMax < bytes_left_to_read_on_page(addr,len) ? wMax : bytes_left_to_read_on_page(addr,len);
	deb_info("%x\n",(addr & V8_MEMORY_PAGE_MASK) \| (V8_MEMORY_EXTENDED*extended));
	if ((ret = flexcop_usb_v8_memory_req(fc_usb,req,
	page_start + (addr / V8_MEMORY_PAGE_SIZE), /* actual page */
	(addr & V8_MEMORY_PAGE_MASK) \| (V8_MEMORY_EXTENDED*extended),
	&buf[i],pagechunk)) < 0)
	return ret;

	addr += pagechunk;
	len -= pagechunk;
	}
	return 0;
	}

	static int flexcop_usb_get_mac_addr(struct flexcop_device *fc, int extended)
	{
	return flexcop_usb_memory_req(fc->bus_specific,B2C2_USB_READ_V8_MEM,
	V8_MEMORY_PAGE_FLASH,0x1f010,1,fc->dvb_adapter.proposed_mac,6);
	}

	#if 0
	static int flexcop_usb_utility_req(struct flexcop_usb *fc_usb, int set,
	flexcop_usb_utility_function_t func, u8 extra, u16 wIndex,
	u16 buflen, u8 *pvBuffer)
	{
	u16 wValue;
	u8 request_type = (set ? USB_DIR_OUT : USB_DIR_IN) \| USB_TYPE_VENDOR;
	// u8 dwRequestType = (u8) RTYPE_GENERIC,
	int nWaitTime = 2,
	pipe = set ? B2C2_USB_CTRL_PIPE_OUT : B2C2_USB_CTRL_PIPE_IN,
	len;

	wValue = (func << 8) \| extra;

	len = usb_control_msg(fc_usb->udev,pipe,
	B2C2_USB_UTILITY,
	request_type,
	wValue,
	wIndex,
	pvBuffer,
	buflen,
	nWaitTime * HZ);
	return len == buflen ? 0 : -EIO;
	}
	#endif

	/* usb i2c stuff */
	static int flexcop_usb_i2c_req(struct flexcop_usb *fc_usb,
	flexcop_usb_request_t req, flexcop_usb_i2c_function_t func,
	flexcop_i2c_port_t port, u8 chipaddr, u8 addr, u8 *buf, u8 buflen)
	{
	u16 wValue, wIndex;
	int nWaitTime,pipe,len;
	// u8 dwRequestType;
	u8 request_type = USB_TYPE_VENDOR;

	switch (func) {
	case USB_FUNC_I2C_WRITE:
	case USB_FUNC_I2C_MULTIWRITE:
	case USB_FUNC_I2C_REPEATWRITE:
	/* DKT 020208 - add this to support special case of DiSEqC */
	case USB_FUNC_I2C_CHECKWRITE:
	pipe = B2C2_USB_CTRL_PIPE_OUT;
	nWaitTime = 2;
	// dwRequestType = (u8) RTYPE_GENERIC;
	request_type \|= USB_DIR_OUT;
	break;
	case USB_FUNC_I2C_READ:
	case USB_FUNC_I2C_REPEATREAD:
	pipe = B2C2_USB_CTRL_PIPE_IN;
	nWaitTime = 2;
	// dwRequestType = (u8) RTYPE_GENERIC;
	request_type \|= USB_DIR_IN;
	break;
	default:
	deb_info("unsupported function for i2c_req %x\n",func);
	return -EINVAL;
	}
	wValue = (func << 8 ) \| (port << 4);
	wIndex = (chipaddr << 8 ) \| addr;

	deb_i2c("i2c %2d: %02x %02x %02x %02x %02x %02x\n",func,request_type,req,
	((wValue && 0xff) << 8),wValue >> 8,((wIndex && 0xff) << 8),wIndex >> 8);

	len = usb_control_msg(fc_usb->udev,pipe,
	req,
	request_type,
	wValue,
	wIndex,
	buf,
	buflen,
	nWaitTime * HZ);

	return len == buflen ? 0 : -EREMOTEIO;
	}

	/* actual bus specific access functions, make sure prototype are/will be equal to pci */
	static flexcop_ibi_value flexcop_usb_read_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register reg)
	{
	flexcop_ibi_value val;
	val.raw = 0;
	flexcop_usb_readwrite_dw(fc,reg, &val.raw, 1);
	return val;
	}

	static int flexcop_usb_write_ibi_reg(struct flexcop_device *fc, flexcop_ibi_register reg, flexcop_ibi_value val)
	{
	return flexcop_usb_readwrite_dw(fc,reg, &val.raw, 0);
	}

	static int flexcop_usb_i2c_request(struct flexcop_device *fc, flexcop_access_op_t op,
	flexcop_i2c_port_t port, u8 chipaddr, u8 addr, u8 *buf, u16 len)
	{
	if (op == FC_READ)
	return flexcop_usb_i2c_req(fc->bus_specific,B2C2_USB_I2C_REQUEST,USB_FUNC_I2C_READ,port,chipaddr,addr,buf,len);
	else
	return flexcop_usb_i2c_req(fc->bus_specific,B2C2_USB_I2C_REQUEST,USB_FUNC_I2C_WRITE,port,chipaddr,addr,buf,len);
	}

	static void flexcop_usb_process_frame(struct flexcop_usb fc_usb, u8 buffer, int buffer_length)
	{
	u8 *b;
	int l;

	deb_ts("tmp_buffer_length=%d, buffer_length=%d\n", fc_usb->tmp_buffer_length, buffer_length);

	if (fc_usb->tmp_buffer_length > 0) {
	memcpy(fc_usb->tmp_buffer+fc_usb->tmp_buffer_length, buffer, buffer_length);
	fc_usb->tmp_buffer_length += buffer_length;
	b = fc_usb->tmp_buffer;
	l = fc_usb->tmp_buffer_length;
	} else {
	b=buffer;
	l=buffer_length;
	}

	while (l >= 190) {
	if (*b == 0xff)
	switch (*(b+1) & 0x03) {
	case 0x01: /* media packet */
	if ( *(b+2) == 0x47 )
	flexcop_pass_dmx_packets(fc_usb->fc_dev, b+2, 1);
	else
	deb_ts("not ts packet %02x %02x %02x %02x \n", (b+2), (b+3), (b+4), (b+5) );

	b += 190;
	l -= 190;
	break;
	default:
	deb_ts("wrong packet type\n");
	l = 0;
	break;
	}
	else {
	deb_ts("wrong header\n");
	l = 0;
	}
	}

	if (l>0)
	memcpy(fc_usb->tmp_buffer, b, l);
	fc_usb->tmp_buffer_length = l;
	}

	static void flexcop_usb_urb_complete(struct urb urb, struct pt_regs ptregs)
	{
	struct flexcop_usb *fc_usb = urb->context;
	int i;

	if (urb->actual_length > 0)
	deb_ts("urb completed, bufsize: %d actlen; %d\n",urb->transfer_buffer_length, urb->actual_length);

	for (i = 0; i < urb->number_of_packets; i++) {
	if (urb->iso_frame_desc[i].status < 0) {
	err("iso frame descriptor %d has an error: %d\n",i,urb->iso_frame_desc[i].status);
	} else
	if (urb->iso_frame_desc[i].actual_length > 0) {
	deb_ts("passed %d bytes to the demux\n",urb->iso_frame_desc[i].actual_length);

	flexcop_usb_process_frame(fc_usb,
	urb->transfer_buffer + urb->iso_frame_desc[i].offset,
	urb->iso_frame_desc[i].actual_length);
	}
	urb->iso_frame_desc[i].status = 0;
	urb->iso_frame_desc[i].actual_length = 0;
	}

	usb_submit_urb(urb,GFP_ATOMIC);
	}

	static int flexcop_usb_stream_control(struct flexcop_device *fc, int onoff)
	{
	/* submit/kill iso packets */
	return 0;
	}

	static void flexcop_usb_transfer_exit(struct flexcop_usb *fc_usb)
	{
	int i;
	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
	if (fc_usb->iso_urb[i] != NULL) {
	deb_ts("unlinking/killing urb no. %d\n",i);
	usb_kill_urb(fc_usb->iso_urb[i]);
	usb_free_urb(fc_usb->iso_urb[i]);
	}

	if (fc_usb->iso_buffer != NULL)
	pci_free_consistent(NULL,fc_usb->buffer_size, fc_usb->iso_buffer, fc_usb->dma_addr);
	}

	static int flexcop_usb_transfer_init(struct flexcop_usb *fc_usb)
	{
	u16 frame_size = fc_usb->uintf->cur_altsetting->endpoint[0].desc.wMaxPacketSize;
	int bufsize = B2C2_USB_NUM_ISO_URB * B2C2_USB_FRAMES_PER_ISO * frame_size,i,j,ret;
	int buffer_offset = 0;

	deb_ts("creating %d iso-urbs with %d frames each of %d bytes size = %d.\n",
	B2C2_USB_NUM_ISO_URB, B2C2_USB_FRAMES_PER_ISO, frame_size,bufsize);

	fc_usb->iso_buffer = pci_alloc_consistent(NULL,bufsize,&fc_usb->dma_addr);
	if (fc_usb->iso_buffer == NULL)
	return -ENOMEM;
	memset(fc_usb->iso_buffer, 0, bufsize);
	fc_usb->buffer_size = bufsize;

	/* creating iso urbs */
	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++)
	if (!(fc_usb->iso_urb[i] = usb_alloc_urb(B2C2_USB_FRAMES_PER_ISO,GFP_ATOMIC))) {
	ret = -ENOMEM;
	goto urb_error;
	}
	/* initialising and submitting iso urbs */
	for (i = 0; i < B2C2_USB_NUM_ISO_URB; i++) {
	int frame_offset = 0;
	struct urb *urb = fc_usb->iso_urb[i];
	deb_ts("initializing and submitting urb no. %d (buf_offset: %d).\n",i,buffer_offset);

	urb->dev = fc_usb->udev;
	urb->context = fc_usb;
	urb->complete = flexcop_usb_urb_complete;
	urb->pipe = B2C2_USB_DATA_PIPE;
	urb->transfer_flags = URB_ISO_ASAP;
	urb->interval = 1;
	urb->number_of_packets = B2C2_USB_FRAMES_PER_ISO;
	urb->transfer_buffer_length = frame_size * B2C2_USB_FRAMES_PER_ISO;
	urb->transfer_buffer = fc_usb->iso_buffer + buffer_offset;

	buffer_offset += frame_size * B2C2_USB_FRAMES_PER_ISO;
	for (j = 0; j < B2C2_USB_FRAMES_PER_ISO; j++) {
	deb_ts("urb no: %d, frame: %d, frame_offset: %d\n",i,j,frame_offset);
	urb->iso_frame_desc[j].offset = frame_offset;
	urb->iso_frame_desc[j].length = frame_size;
	frame_offset += frame_size;
	}

	if ((ret = usb_submit_urb(fc_usb->iso_urb[i],GFP_ATOMIC))) {
	err("submitting urb %d failed with %d.",i,ret);
	goto urb_error;
	}
	deb_ts("submitted urb no. %d.\n",i);
	}

	/* SRAM */

	flexcop_sram_set_dest(fc_usb->fc_dev,FC_SRAM_DEST_MEDIA \| FC_SRAM_DEST_NET \|
	FC_SRAM_DEST_CAO \| FC_SRAM_DEST_CAI, FC_SRAM_DEST_TARGET_WAN_USB);
	flexcop_wan_set_speed(fc_usb->fc_dev,FC_WAN_SPEED_8MBITS);
	flexcop_sram_ctrl(fc_usb->fc_dev,1,1,1);

	ret = 0;
	goto success;
	urb_error:
	flexcop_usb_transfer_exit(fc_usb);
	success:
	return ret;
	}

	static int flexcop_usb_init(struct flexcop_usb *fc_usb)
	{
	/* use the alternate setting with the larges buffer */
	usb_set_interface(fc_usb->udev,0,1);
	switch (fc_usb->udev->speed) {
	case USB_SPEED_LOW:
	err("cannot handle USB speed because it is to sLOW.");
	return -ENODEV;
	break;
	case USB_SPEED_FULL:
	info("running at FULL speed.");
	break;
	case USB_SPEED_HIGH:
	info("running at HIGH speed.");
	break;
	case USB_SPEED_UNKNOWN: /* fall through */
	default:
	err("cannot handle USB speed because it is unkown.");
	return -ENODEV;
	}
	usb_set_intfdata(fc_usb->uintf, fc_usb);
	return 0;
	}

	static void flexcop_usb_exit(struct flexcop_usb *fc_usb)
	{
	usb_set_intfdata(fc_usb->uintf, NULL);
	}

	static int flexcop_usb_probe(struct usb_interface *intf,
	const struct usb_device_id *id)
	{
	struct usb_device *udev = interface_to_usbdev(intf);
	struct flexcop_usb *fc_usb = NULL;
	struct flexcop_device *fc = NULL;
	int ret;

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

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

	fc->read_ibi_reg = flexcop_usb_read_ibi_reg;
	fc->write_ibi_reg = flexcop_usb_write_ibi_reg;
	fc->i2c_request = flexcop_usb_i2c_request;
	fc->get_mac_addr = flexcop_usb_get_mac_addr;

	fc->stream_control = flexcop_usb_stream_control;

	fc->pid_filtering = 1;
	fc->bus_type = FC_USB;

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

	/* bus specific part */
	fc_usb->udev = udev;
	fc_usb->uintf = intf;
	if ((ret = flexcop_usb_init(fc_usb)) != 0)
	goto err_kfree;

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

	/* xfer init */
	if ((ret = flexcop_usb_transfer_init(fc_usb)) != 0)
	goto err_fc_exit;

	info("%s successfully initialized and connected.",DRIVER_NAME);
	ret = 0;
	goto success;
	err_fc_exit:
	flexcop_device_exit(fc);
	err_usb_exit:
	flexcop_usb_exit(fc_usb);
	err_kfree:
	flexcop_device_kfree(fc);
	success:
	return ret;
	}

	static void flexcop_usb_disconnect(struct usb_interface *intf)
	{
	struct flexcop_usb *fc_usb = usb_get_intfdata(intf);
	flexcop_usb_transfer_exit(fc_usb);
	flexcop_device_exit(fc_usb->fc_dev);
	flexcop_usb_exit(fc_usb);
	flexcop_device_kfree(fc_usb->fc_dev);
	info("%s successfully deinitialized and disconnected.",DRIVER_NAME);
	}

	static struct usb_device_id flexcop_usb_table [] = {
	{ USB_DEVICE(0x0af7, 0x0101) },
	{ }
	};

	/* usb specific object needed to register this driver with the usb subsystem */
	static struct usb_driver flexcop_usb_driver = {
	.owner = THIS_MODULE,
	.name = "b2c2_flexcop_usb",
	.probe = flexcop_usb_probe,
	.disconnect = flexcop_usb_disconnect,
	.id_table = flexcop_usb_table,
	};

	/* module stuff */
	static int __init flexcop_usb_module_init(void)
	{
	int result;
	if ((result = usb_register(&flexcop_usb_driver))) {
	err("usb_register failed. (%d)",result);
	return result;
	}

	return 0;
	}

	static void __exit flexcop_usb_module_exit(void)
	{
	/* deregister this driver from the USB subsystem */
	usb_deregister(&flexcop_usb_driver);
	}

	module_init(flexcop_usb_module_init);
	module_exit(flexcop_usb_module_exit);

	MODULE_AUTHOR(DRIVER_AUTHOR);
	MODULE_DESCRIPTION(DRIVER_NAME);
	MODULE_LICENSE("GPL");