drivers/isdn/hisax/st5481.h - kernel/msm-4.9 - Gitiles

 /*
  * Driver for ST5481 USB ISDN modem
  *
  * Author       Frode Isaksen
  * Copyright    2001 by Frode Isaksen      <fisaksen@bewan.com>
  *              2001 by Kai Germaschewski  <kai.germaschewski@gmx.de>
  *
  * This software may be used and distributed according to the terms
  * of the GNU General Public License, incorporated herein by reference.
  *
  */

 #ifndef _ST5481_H_
 #define _ST5481_H_


 // USB IDs, the Product Id is in the range 0x4810-0x481F

 #define ST_VENDOR_ID 0x0483
 #define ST5481_PRODUCT_ID 0x4810
 #define ST5481_PRODUCT_ID_MASK 0xFFF0

 // ST5481 endpoints when using alternative setting 3 (2B+D).
 // To get the endpoint address, OR with 0x80 for IN endpoints.

 #define EP_CTRL   0x00U /* Control endpoint */
 #define EP_INT    0x01U /* Interrupt endpoint */
 #define EP_B1_OUT 0x02U /* B1 channel out */
 #define EP_B1_IN  0x03U /* B1 channel in */
 #define EP_B2_OUT 0x04U /* B2 channel out */
 #define EP_B2_IN  0x05U /* B2 channel in */
 #define EP_D_OUT  0x06U /* D channel out */
 #define EP_D_IN   0x07U /* D channel in */

 // Number of isochronous packets. With 20 packets we get
 // 50 interrupts/sec for each endpoint.

 #define NUM_ISO_PACKETS_D      20
 #define NUM_ISO_PACKETS_B      20

 // Size of each isochronous packet.
 // In outgoing direction we need to match ISDN data rates:
 // D:  2 bytes / msec -> 16 kbit / s
 // B: 16 bytes / msec -> 64 kbit / s
 #define SIZE_ISO_PACKETS_D_IN  16
 #define SIZE_ISO_PACKETS_D_OUT 2
 #define SIZE_ISO_PACKETS_B_IN  32
 #define SIZE_ISO_PACKETS_B_OUT 8

 // If we overrun/underrun, we send one packet with +/- 2 bytes
 #define B_FLOW_ADJUST 2

 // Registers that are written using vendor specific device request
 // on endpoint 0.

 #define LBA			0x02 /* S loopback */
 #define SET_DEFAULT		0x06 /* Soft reset */
 #define LBB			0x1D /* S maintenance loopback */
 #define STT			0x1e /* S force transmission signals */
 #define SDA_MIN			0x20 /* SDA-sin minimal value */
 #define SDA_MAX			0x21 /* SDA-sin maximal value */
 #define SDELAY_VALUE		0x22 /* Delay between Tx and Rx clock */
 #define IN_D_COUNTER		0x36 /* D receive channel fifo counter */
 #define OUT_D_COUNTER		0x37 /* D transmit channel fifo counter */
 #define IN_B1_COUNTER		0x38 /* B1 receive channel fifo counter */
 #define OUT_B1_COUNTER		0x39 /* B1 transmit channel fifo counter */
 #define IN_B2_COUNTER		0x3a /* B2 receive channel fifo counter */
 #define OUT_B2_COUNTER		0x3b /* B2 transmit channel fifo counter */
 #define FFCTRL_IN_D		0x3C /* D receive channel fifo threshold low */
 #define FFCTRH_IN_D		0x3D /* D receive channel fifo threshold high */
 #define FFCTRL_OUT_D		0x3E /* D transmit channel fifo threshold low */
 #define FFCTRH_OUT_D		0x3F /* D transmit channel fifo threshold high */
 #define FFCTRL_IN_B1		0x40 /* B1 receive channel fifo threshold low */
 #define FFCTRH_IN_B1		0x41 /* B1 receive channel fifo threshold high */
 #define FFCTRL_OUT_B1		0x42 /* B1 transmit channel fifo threshold low */
 #define FFCTRH_OUT_B1		0x43 /* B1 transmit channel fifo threshold high */
 #define FFCTRL_IN_B2		0x44 /* B2 receive channel fifo threshold low */
 #define FFCTRH_IN_B2		0x45 /* B2 receive channel fifo threshold high */
 #define FFCTRL_OUT_B2		0x46 /* B2 transmit channel fifo threshold low */
 #define FFCTRH_OUT_B2		0x47 /* B2 transmit channel fifo threshold high */
 #define MPMSK			0x4A /* Multi purpose interrupt MASK register */
 #define	FFMSK_D			0x4c /* D fifo interrupt MASK register */
 #define	FFMSK_B1		0x4e /* B1 fifo interrupt MASK register */
 #define	FFMSK_B2		0x50 /* B2 fifo interrupt MASK register */
 #define GPIO_DIR		0x52 /* GPIO pins direction registers */
 #define GPIO_OUT		0x53 /* GPIO pins output register */
 #define GPIO_IN			0x54 /* GPIO pins input register */
 #define TXCI			0x56 /* CI command to be transmitted */


 // Format of the interrupt packet received on endpoint 1:
 //
 // +--------+--------+--------+--------+--------+--------+
 // !MPINT   !FFINT_D !FFINT_B1!FFINT_B2!CCIST   !GPIO_INT!
 // +--------+--------+--------+--------+--------+--------+

 // Offsets in the interrupt packet

 #define MPINT			0
 #define FFINT_D			1
 #define FFINT_B1		2
 #define FFINT_B2		3
 #define CCIST			4
 #define GPIO_INT		5
 #define INT_PKT_SIZE            6

 // MPINT
 #define LSD_INT                 0x80 /* S line activity detected */
 #define RXCI_INT		0x40 /* Indicate primitive arrived */
 #define	DEN_INT			0x20 /* Signal enabling data out of D Tx fifo */
 #define DCOLL_INT		0x10 /* D channel collision */
 #define AMIVN_INT		0x04 /* AMI violation number reached 2 */
 #define INFOI_INT		0x04 /* INFOi changed */
 #define DRXON_INT               0x02 /* Reception channel active */
 #define GPCHG_INT               0x01 /* GPIO pin value changed */

 // FFINT_x
 #define IN_OVERRUN		0x80 /* In fifo overrun */
 #define OUT_UNDERRUN		0x40 /* Out fifo underrun */
 #define IN_UP			0x20 /* In fifo thresholdh up-crossed */
 #define IN_DOWN			0x10 /* In fifo thresholdl down-crossed */
 #define OUT_UP			0x08 /* Out fifo thresholdh up-crossed */
 #define OUT_DOWN		0x04 /* Out fifo thresholdl down-crossed */
 #define IN_COUNTER_ZEROED	0x02 /* In down-counter reached 0 */
 #define OUT_COUNTER_ZEROED	0x01 /* Out down-counter reached 0 */

 #define ANY_REC_INT	(IN_OVERRUN + IN_UP + IN_DOWN + IN_COUNTER_ZEROED)
 #define ANY_XMIT_INT	(OUT_UNDERRUN + OUT_UP + OUT_DOWN + OUT_COUNTER_ZEROED)


 // Level 1 commands that are sent using the TXCI device request
 #define ST5481_CMD_DR		 0x0 /* Deactivation Request */
 #define ST5481_CMD_RES		 0x1 /* state machine RESet */
 #define ST5481_CMD_TM1		 0x2 /* Test Mode 1 */
 #define ST5481_CMD_TM2		 0x3 /* Test Mode 2 */
 #define ST5481_CMD_PUP		 0x7 /* Power UP */
 #define ST5481_CMD_AR8		 0x8 /* Activation Request class 1 */
 #define ST5481_CMD_AR10		 0x9 /* Activation Request class 2 */
 #define ST5481_CMD_ARL		 0xA /* Activation Request Loopback */
 #define ST5481_CMD_PDN		 0xF /* Power DoWn */

 // Turn on/off the LEDs using the GPIO device request.
 // To use the B LEDs, number_of_leds must be set to 4
 #define B1_LED		0x10U
 #define B2_LED		0x20U
 #define GREEN_LED	0x40U
 #define RED_LED	        0x80U

 // D channel out states
 enum {
 	ST_DOUT_NONE,

 	ST_DOUT_SHORT_INIT,
 	ST_DOUT_SHORT_WAIT_DEN,

 	ST_DOUT_LONG_INIT,
 	ST_DOUT_LONG_WAIT_DEN,
 	ST_DOUT_NORMAL,

 	ST_DOUT_WAIT_FOR_UNDERRUN,
 	ST_DOUT_WAIT_FOR_NOT_BUSY,
 	ST_DOUT_WAIT_FOR_STOP,
 	ST_DOUT_WAIT_FOR_RESET,
 };

 #define DOUT_STATE_COUNT (ST_DOUT_WAIT_FOR_RESET + 1)

 // D channel out events
 enum {
 	EV_DOUT_START_XMIT,
 	EV_DOUT_COMPLETE,
 	EV_DOUT_DEN,
 	EV_DOUT_RESETED,
 	EV_DOUT_STOPPED,
 	EV_DOUT_COLL,
 	EV_DOUT_UNDERRUN,
 };

 #define DOUT_EVENT_COUNT (EV_DOUT_UNDERRUN + 1)

 // ----------------------------------------------------------------------

 enum {
 	ST_L1_F3,
 	ST_L1_F4,
 	ST_L1_F6,
 	ST_L1_F7,
 	ST_L1_F8,
 };

 #define L1_STATE_COUNT (ST_L1_F8 + 1)

 // The first 16 entries match the Level 1 indications that
 // are found at offset 4 (CCIST) in the interrupt packet

 enum {
 	EV_IND_DP,  // 0000 Deactivation Pending
 	EV_IND_1,   // 0001
 	EV_IND_2,   // 0010
 	EV_IND_3,   // 0011
 	EV_IND_RSY, // 0100 ReSYnchronizing
 	EV_IND_5,   // 0101
 	EV_IND_6,   // 0110
 	EV_IND_7,   // 0111
 	EV_IND_AP,  // 1000 Activation Pending
 	EV_IND_9,   // 1001
 	EV_IND_10,  // 1010
 	EV_IND_11,  // 1011
 	EV_IND_AI8, // 1100 Activation Indication class 8
 	EV_IND_AI10,// 1101 Activation Indication class 10
 	EV_IND_AIL, // 1110 Activation Indication Loopback
 	EV_IND_DI,  // 1111 Deactivation Indication
 	EV_PH_ACTIVATE_REQ,
 	EV_PH_DEACTIVATE_REQ,
 	EV_TIMER3,
 };

 #define L1_EVENT_COUNT (EV_TIMER3 + 1)

 #define ERR(format, arg...)						\
 	printk(KERN_ERR "%s:%s: " format "\n" , __FILE__,  __func__ , ## arg)

 #define WARNING(format, arg...)						\
 	printk(KERN_WARNING "%s:%s: " format "\n" , __FILE__,  __func__ , ## arg)

 #define INFO(format, arg...)						\
 	printk(KERN_INFO "%s:%s: " format "\n" , __FILE__,  __func__ , ## arg)

 #include <linux/isdn/hdlc.h>
 #include "fsm.h"
 #include "hisax_if.h"
 #include <linux/skbuff.h>

 /* ======================================================================
  * FIFO handling
  */

 /* Generic FIFO structure */
 struct fifo {
 	u_char r, w, count, size;
 	spinlock_t lock;
 };

 /*
  * Init an FIFO
  */
 static inline void fifo_init(struct fifo *fifo, int size)
 {
 	fifo->r = fifo->w = fifo->count = 0;
 	fifo->size = size;
 	spin_lock_init(&fifo->lock);
 }

 /*
  * Add an entry to the FIFO
  */
 static inline int fifo_add(struct fifo *fifo)
 {
 	unsigned long flags;
 	int index;

 	if (!fifo) {
 		return -1;
 	}

 	spin_lock_irqsave(&fifo->lock, flags);
 	if (fifo->count == fifo->size) {
 		// FIFO full
 		index = -1;
 	} else {
 		// Return index where to get the next data to add to the FIFO
 		index = fifo->w++ & (fifo->size - 1);
 		fifo->count++;
 	}
 	spin_unlock_irqrestore(&fifo->lock, flags);
 	return index;
 }

 /*
  * Remove an entry from the FIFO with the index returned.
  */
 static inline int fifo_remove(struct fifo *fifo)
 {
 	unsigned long flags;
 	int index;

 	if (!fifo) {
 		return -1;
 	}

 	spin_lock_irqsave(&fifo->lock, flags);
 	if (!fifo->count) {
 		// FIFO empty
 		index = -1;
 	} else {
 		// Return index where to get the next data from the FIFO
 		index = fifo->r++ & (fifo->size - 1);
 		fifo->count--;
 	}
 	spin_unlock_irqrestore(&fifo->lock, flags);

 	return index;
 }

 /* ======================================================================
  * control pipe
  */
 typedef void (*ctrl_complete_t)(void *);

 typedef struct ctrl_msg {
 	struct usb_ctrlrequest dr;
 	ctrl_complete_t complete;
 	void *context;
 } ctrl_msg;

 /* FIFO of ctrl messages waiting to be sent */
 #define MAX_EP0_MSG 16
 struct ctrl_msg_fifo {
 	struct fifo f;
 	struct ctrl_msg data[MAX_EP0_MSG];
 };

 #define MAX_DFRAME_LEN_L1	300
 #define HSCX_BUFMAX	4096

 struct st5481_ctrl {
 	struct ctrl_msg_fifo msg_fifo;
 	unsigned long busy;
 	struct urb *urb;
 };

 struct st5481_intr {
 	//	struct evt_fifo evt_fifo;
 	struct urb *urb;
 };

 struct st5481_d_out {
 	struct isdnhdlc_vars hdlc_state;
 	struct urb *urb[2]; /* double buffering */
 	unsigned long busy;
 	struct sk_buff *tx_skb;
 	struct FsmInst fsm;
 };

 struct st5481_b_out {
 	struct isdnhdlc_vars hdlc_state;
 	struct urb *urb[2]; /* double buffering */
 	u_char flow_event;
 	u_long busy;
 	struct sk_buff *tx_skb;
 };

 struct st5481_in {
 	struct isdnhdlc_vars hdlc_state;
 	struct urb *urb[2]; /* double buffering */
 	int mode;
 	int bufsize;
 	unsigned int num_packets;
 	unsigned int packet_size;
 	unsigned char ep, counter;
 	unsigned char *rcvbuf;
 	struct st5481_adapter *adapter;
 	struct hisax_if *hisax_if;
 };

 int st5481_setup_in(struct st5481_in *in);
 void st5481_release_in(struct st5481_in *in);
 void st5481_in_mode(struct st5481_in *in, int mode);

 struct st5481_bcs {
 	struct hisax_b_if b_if;
 	struct st5481_adapter *adapter;
 	struct st5481_in b_in;
 	struct st5481_b_out b_out;
 	int channel;
 	int mode;
 };

 struct st5481_adapter {
 	int number_of_leds;
 	struct usb_device *usb_dev;
 	struct hisax_d_if hisax_d_if;

 	struct st5481_ctrl ctrl;
 	struct st5481_intr intr;
 	struct st5481_in d_in;
 	struct st5481_d_out d_out;

 	unsigned char leds;
 	unsigned int led_counter;

 	unsigned long event;

 	struct FsmInst l1m;
 	struct FsmTimer timer;

 	struct st5481_bcs bcs[2];
 };

 #define TIMER3_VALUE 7000

 /* ======================================================================
  *
  */

 /*
  * Submit an URB with error reporting. This is a macro so
  * the __func__ returns the caller function name.
  */
 #define SUBMIT_URB(urb, mem_flags)					\
 	({								\
 		int status;						\
 		if ((status = usb_submit_urb(urb, mem_flags)) < 0) {	\
 			WARNING("usb_submit_urb failed,status=%d", status); \
 		}							\
 		status;							\
 	})

 /*
  * USB double buffering, return the URB index (0 or 1).
  */
 static inline int get_buf_nr(struct urb *urbs[], struct urb *urb)
 {
 	return (urbs[0] == urb ? 0 : 1);
 }

 /* ---------------------------------------------------------------------- */

 /* B Channel */

 int  st5481_setup_b(struct st5481_bcs *bcs);
 void st5481_release_b(struct st5481_bcs *bcs);
 void st5481_d_l2l1(struct hisax_if *hisax_d_if, int pr, void *arg);

 /* D Channel */

 int  st5481_setup_d(struct st5481_adapter *adapter);
 void st5481_release_d(struct st5481_adapter *adapter);
 void st5481_b_l2l1(struct hisax_if *b_if, int pr, void *arg);
 int  st5481_d_init(void);
 void st5481_d_exit(void);

 /* USB */
 void st5481_ph_command(struct st5481_adapter *adapter, unsigned int command);
 int st5481_setup_isocpipes(struct urb *urb[2], struct usb_device *dev,
 			   unsigned int pipe, int num_packets,
 			   int packet_size, int buf_size,
 			   usb_complete_t complete, void *context);
 void st5481_release_isocpipes(struct urb *urb[2]);

 void st5481_usb_pipe_reset(struct st5481_adapter *adapter,
 			   u_char pipe, ctrl_complete_t complete, void *context);
 void st5481_usb_device_ctrl_msg(struct st5481_adapter *adapter,
 				u8 request, u16 value,
 				ctrl_complete_t complete, void *context);
 int  st5481_setup_usb(struct st5481_adapter *adapter);
 void st5481_release_usb(struct st5481_adapter *adapter);
 void st5481_start(struct st5481_adapter *adapter);
 void st5481_stop(struct st5481_adapter *adapter);

 // ----------------------------------------------------------------------
 // debugging macros

 #define __debug_variable st5481_debug
 #include "hisax_debug.h"

 extern int st5481_debug;

 #ifdef CONFIG_HISAX_DEBUG

 #define DBG_ISO_PACKET(level, urb)					\
 	if (level & __debug_variable) dump_iso_packet(__func__, urb)

 static void __attribute__((unused))
 dump_iso_packet(const char *name, struct urb *urb)
 {
 	int i, j;
 	int len, ofs;
 	u_char *data;

 	printk(KERN_DEBUG "%s: packets=%d,errors=%d\n",
 	       name, urb->number_of_packets, urb->error_count);
 	for (i = 0; i  < urb->number_of_packets; ++i) {
 		if (urb->pipe & USB_DIR_IN) {
 			len = urb->iso_frame_desc[i].actual_length;
 		} else {
 			len = urb->iso_frame_desc[i].length;
 		}
 		ofs = urb->iso_frame_desc[i].offset;
 		printk(KERN_DEBUG "len=%.2d,ofs=%.3d ", len, ofs);
 		if (len) {
 			data = urb->transfer_buffer + ofs;
 			for (j = 0; j < len; j++) {
 				printk("%.2x", data[j]);
 			}
 		}
 		printk("\n");
 	}
 }

 static inline const char *ST5481_CMD_string(int evt)
 {
 	static char s[16];

 	switch (evt) {
 	case ST5481_CMD_DR: return "DR";
 	case ST5481_CMD_RES: return "RES";
 	case ST5481_CMD_TM1: return "TM1";
 	case ST5481_CMD_TM2: return "TM2";
 	case ST5481_CMD_PUP: return "PUP";
 	case ST5481_CMD_AR8: return "AR8";
 	case ST5481_CMD_AR10: return "AR10";
 	case ST5481_CMD_ARL: return "ARL";
 	case ST5481_CMD_PDN: return "PDN";
 	};

 	sprintf(s, "0x%x", evt);
 	return s;
 }

 #else

 #define DBG_ISO_PACKET(level, urb) do {} while (0)

 #endif


 #endif
	/*
	* Driver for ST5481 USB ISDN modem
	*
	* Author Frode Isaksen
	* Copyright 2001 by Frode Isaksen <fisaksen@bewan.com>
	* 2001 by Kai Germaschewski <kai.germaschewski@gmx.de>
	*
	* This software may be used and distributed according to the terms
	* of the GNU General Public License, incorporated herein by reference.
	*
	*/

	#ifndef _ST5481_H_
	#define _ST5481_H_


	// USB IDs, the Product Id is in the range 0x4810-0x481F

	#define ST_VENDOR_ID 0x0483
	#define ST5481_PRODUCT_ID 0x4810
	#define ST5481_PRODUCT_ID_MASK 0xFFF0

	// ST5481 endpoints when using alternative setting 3 (2B+D).
	// To get the endpoint address, OR with 0x80 for IN endpoints.

	#define EP_CTRL 0x00U /* Control endpoint */
	#define EP_INT 0x01U /* Interrupt endpoint */
	#define EP_B1_OUT 0x02U /* B1 channel out */
	#define EP_B1_IN 0x03U /* B1 channel in */
	#define EP_B2_OUT 0x04U /* B2 channel out */
	#define EP_B2_IN 0x05U /* B2 channel in */
	#define EP_D_OUT 0x06U /* D channel out */
	#define EP_D_IN 0x07U /* D channel in */

	// Number of isochronous packets. With 20 packets we get
	// 50 interrupts/sec for each endpoint.

	#define NUM_ISO_PACKETS_D 20
	#define NUM_ISO_PACKETS_B 20

	// Size of each isochronous packet.
	// In outgoing direction we need to match ISDN data rates:
	// D: 2 bytes / msec -> 16 kbit / s
	// B: 16 bytes / msec -> 64 kbit / s
	#define SIZE_ISO_PACKETS_D_IN 16
	#define SIZE_ISO_PACKETS_D_OUT 2
	#define SIZE_ISO_PACKETS_B_IN 32
	#define SIZE_ISO_PACKETS_B_OUT 8

	// If we overrun/underrun, we send one packet with +/- 2 bytes
	#define B_FLOW_ADJUST 2

	// Registers that are written using vendor specific device request
	// on endpoint 0.

	#define LBA 0x02 /* S loopback */
	#define SET_DEFAULT 0x06 /* Soft reset */
	#define LBB 0x1D /* S maintenance loopback */
	#define STT 0x1e /* S force transmission signals */
	#define SDA_MIN 0x20 /* SDA-sin minimal value */
	#define SDA_MAX 0x21 /* SDA-sin maximal value */
	#define SDELAY_VALUE 0x22 /* Delay between Tx and Rx clock */
	#define IN_D_COUNTER 0x36 /* D receive channel fifo counter */
	#define OUT_D_COUNTER 0x37 /* D transmit channel fifo counter */
	#define IN_B1_COUNTER 0x38 /* B1 receive channel fifo counter */
	#define OUT_B1_COUNTER 0x39 /* B1 transmit channel fifo counter */
	#define IN_B2_COUNTER 0x3a /* B2 receive channel fifo counter */
	#define OUT_B2_COUNTER 0x3b /* B2 transmit channel fifo counter */
	#define FFCTRL_IN_D 0x3C /* D receive channel fifo threshold low */
	#define FFCTRH_IN_D 0x3D /* D receive channel fifo threshold high */
	#define FFCTRL_OUT_D 0x3E /* D transmit channel fifo threshold low */
	#define FFCTRH_OUT_D 0x3F /* D transmit channel fifo threshold high */
	#define FFCTRL_IN_B1 0x40 /* B1 receive channel fifo threshold low */
	#define FFCTRH_IN_B1 0x41 /* B1 receive channel fifo threshold high */
	#define FFCTRL_OUT_B1 0x42 /* B1 transmit channel fifo threshold low */
	#define FFCTRH_OUT_B1 0x43 /* B1 transmit channel fifo threshold high */
	#define FFCTRL_IN_B2 0x44 /* B2 receive channel fifo threshold low */
	#define FFCTRH_IN_B2 0x45 /* B2 receive channel fifo threshold high */
	#define FFCTRL_OUT_B2 0x46 /* B2 transmit channel fifo threshold low */
	#define FFCTRH_OUT_B2 0x47 /* B2 transmit channel fifo threshold high */
	#define MPMSK 0x4A /* Multi purpose interrupt MASK register */
	#define FFMSK_D 0x4c /* D fifo interrupt MASK register */
	#define FFMSK_B1 0x4e /* B1 fifo interrupt MASK register */
	#define FFMSK_B2 0x50 /* B2 fifo interrupt MASK register */
	#define GPIO_DIR 0x52 /* GPIO pins direction registers */
	#define GPIO_OUT 0x53 /* GPIO pins output register */
	#define GPIO_IN 0x54 /* GPIO pins input register */
	#define TXCI 0x56 /* CI command to be transmitted */


	// Format of the interrupt packet received on endpoint 1:
	//
	// +--------+--------+--------+--------+--------+--------+
	// !MPINT !FFINT_D !FFINT_B1!FFINT_B2!CCIST !GPIO_INT!
	// +--------+--------+--------+--------+--------+--------+

	// Offsets in the interrupt packet

	#define MPINT 0
	#define FFINT_D 1
	#define FFINT_B1 2
	#define FFINT_B2 3
	#define CCIST 4
	#define GPIO_INT 5
	#define INT_PKT_SIZE 6

	// MPINT
	#define LSD_INT 0x80 /* S line activity detected */
	#define RXCI_INT 0x40 /* Indicate primitive arrived */
	#define DEN_INT 0x20 /* Signal enabling data out of D Tx fifo */
	#define DCOLL_INT 0x10 /* D channel collision */
	#define AMIVN_INT 0x04 /* AMI violation number reached 2 */
	#define INFOI_INT 0x04 /* INFOi changed */
	#define DRXON_INT 0x02 /* Reception channel active */
	#define GPCHG_INT 0x01 /* GPIO pin value changed */

	// FFINT_x
	#define IN_OVERRUN 0x80 /* In fifo overrun */
	#define OUT_UNDERRUN 0x40 /* Out fifo underrun */
	#define IN_UP 0x20 /* In fifo thresholdh up-crossed */
	#define IN_DOWN 0x10 /* In fifo thresholdl down-crossed */
	#define OUT_UP 0x08 /* Out fifo thresholdh up-crossed */
	#define OUT_DOWN 0x04 /* Out fifo thresholdl down-crossed */
	#define IN_COUNTER_ZEROED 0x02 /* In down-counter reached 0 */
	#define OUT_COUNTER_ZEROED 0x01 /* Out down-counter reached 0 */

	#define ANY_REC_INT (IN_OVERRUN + IN_UP + IN_DOWN + IN_COUNTER_ZEROED)
	#define ANY_XMIT_INT (OUT_UNDERRUN + OUT_UP + OUT_DOWN + OUT_COUNTER_ZEROED)


	// Level 1 commands that are sent using the TXCI device request
	#define ST5481_CMD_DR 0x0 /* Deactivation Request */
	#define ST5481_CMD_RES 0x1 /* state machine RESet */
	#define ST5481_CMD_TM1 0x2 /* Test Mode 1 */
	#define ST5481_CMD_TM2 0x3 /* Test Mode 2 */
	#define ST5481_CMD_PUP 0x7 /* Power UP */
	#define ST5481_CMD_AR8 0x8 /* Activation Request class 1 */
	#define ST5481_CMD_AR10 0x9 /* Activation Request class 2 */
	#define ST5481_CMD_ARL 0xA /* Activation Request Loopback */
	#define ST5481_CMD_PDN 0xF /* Power DoWn */

	// Turn on/off the LEDs using the GPIO device request.
	// To use the B LEDs, number_of_leds must be set to 4
	#define B1_LED 0x10U
	#define B2_LED 0x20U
	#define GREEN_LED 0x40U
	#define RED_LED 0x80U

	// D channel out states
	enum {
	ST_DOUT_NONE,

	ST_DOUT_SHORT_INIT,
	ST_DOUT_SHORT_WAIT_DEN,

	ST_DOUT_LONG_INIT,
	ST_DOUT_LONG_WAIT_DEN,
	ST_DOUT_NORMAL,

	ST_DOUT_WAIT_FOR_UNDERRUN,
	ST_DOUT_WAIT_FOR_NOT_BUSY,
	ST_DOUT_WAIT_FOR_STOP,
	ST_DOUT_WAIT_FOR_RESET,
	};

	#define DOUT_STATE_COUNT (ST_DOUT_WAIT_FOR_RESET + 1)

	// D channel out events
	enum {
	EV_DOUT_START_XMIT,
	EV_DOUT_COMPLETE,
	EV_DOUT_DEN,
	EV_DOUT_RESETED,
	EV_DOUT_STOPPED,
	EV_DOUT_COLL,
	EV_DOUT_UNDERRUN,
	};

	#define DOUT_EVENT_COUNT (EV_DOUT_UNDERRUN + 1)

	// ----------------------------------------------------------------------

	enum {
	ST_L1_F3,
	ST_L1_F4,
	ST_L1_F6,
	ST_L1_F7,
	ST_L1_F8,
	};

	#define L1_STATE_COUNT (ST_L1_F8 + 1)

	// The first 16 entries match the Level 1 indications that
	// are found at offset 4 (CCIST) in the interrupt packet

	enum {
	EV_IND_DP, // 0000 Deactivation Pending
	EV_IND_1, // 0001
	EV_IND_2, // 0010
	EV_IND_3, // 0011
	EV_IND_RSY, // 0100 ReSYnchronizing
	EV_IND_5, // 0101
	EV_IND_6, // 0110
	EV_IND_7, // 0111
	EV_IND_AP, // 1000 Activation Pending
	EV_IND_9, // 1001
	EV_IND_10, // 1010
	EV_IND_11, // 1011
	EV_IND_AI8, // 1100 Activation Indication class 8
	EV_IND_AI10,// 1101 Activation Indication class 10
	EV_IND_AIL, // 1110 Activation Indication Loopback
	EV_IND_DI, // 1111 Deactivation Indication
	EV_PH_ACTIVATE_REQ,
	EV_PH_DEACTIVATE_REQ,
	EV_TIMER3,
	};

	#define L1_EVENT_COUNT (EV_TIMER3 + 1)

	#define ERR(format, arg...) \
	printk(KERN_ERR "%s:%s: " format "\n" , __FILE__, __func__ , ## arg)

	#define WARNING(format, arg...) \
	printk(KERN_WARNING "%s:%s: " format "\n" , __FILE__, __func__ , ## arg)

	#define INFO(format, arg...) \
	printk(KERN_INFO "%s:%s: " format "\n" , __FILE__, __func__ , ## arg)

	#include <linux/isdn/hdlc.h>
	#include "fsm.h"
	#include "hisax_if.h"
	#include <linux/skbuff.h>

	/* ======================================================================
	* FIFO handling
	*/

	/* Generic FIFO structure */
	struct fifo {
	u_char r, w, count, size;
	spinlock_t lock;
	};

	/*
	* Init an FIFO
	*/
	static inline void fifo_init(struct fifo *fifo, int size)
	{
	fifo->r = fifo->w = fifo->count = 0;
	fifo->size = size;
	spin_lock_init(&fifo->lock);
	}

	/*
	* Add an entry to the FIFO
	*/
	static inline int fifo_add(struct fifo *fifo)
	{
	unsigned long flags;
	int index;

	if (!fifo) {
	return -1;
	}

	spin_lock_irqsave(&fifo->lock, flags);
	if (fifo->count == fifo->size) {
	// FIFO full
	index = -1;
	} else {
	// Return index where to get the next data to add to the FIFO
	index = fifo->w++ & (fifo->size - 1);
	fifo->count++;
	}
	spin_unlock_irqrestore(&fifo->lock, flags);
	return index;
	}

	/*
	* Remove an entry from the FIFO with the index returned.
	*/
	static inline int fifo_remove(struct fifo *fifo)
	{
	unsigned long flags;
	int index;

	if (!fifo) {
	return -1;
	}

	spin_lock_irqsave(&fifo->lock, flags);
	if (!fifo->count) {
	// FIFO empty
	index = -1;
	} else {
	// Return index where to get the next data from the FIFO
	index = fifo->r++ & (fifo->size - 1);
	fifo->count--;
	}
	spin_unlock_irqrestore(&fifo->lock, flags);

	return index;
	}

	/* ======================================================================
	* control pipe
	*/
	typedef void (ctrl_complete_t)(void );

	typedef struct ctrl_msg {
	struct usb_ctrlrequest dr;
	ctrl_complete_t complete;
	void *context;
	} ctrl_msg;

	/* FIFO of ctrl messages waiting to be sent */
	#define MAX_EP0_MSG 16
	struct ctrl_msg_fifo {
	struct fifo f;
	struct ctrl_msg data[MAX_EP0_MSG];
	};

	#define MAX_DFRAME_LEN_L1 300
	#define HSCX_BUFMAX 4096

	struct st5481_ctrl {
	struct ctrl_msg_fifo msg_fifo;
	unsigned long busy;
	struct urb *urb;
	};

	struct st5481_intr {
	// struct evt_fifo evt_fifo;
	struct urb *urb;
	};

	struct st5481_d_out {
	struct isdnhdlc_vars hdlc_state;
	struct urb urb[2]; / double buffering */
	unsigned long busy;
	struct sk_buff *tx_skb;
	struct FsmInst fsm;
	};

	struct st5481_b_out {
	struct isdnhdlc_vars hdlc_state;
	struct urb urb[2]; / double buffering */
	u_char flow_event;
	u_long busy;
	struct sk_buff *tx_skb;
	};

	struct st5481_in {
	struct isdnhdlc_vars hdlc_state;
	struct urb urb[2]; / double buffering */
	int mode;
	int bufsize;
	unsigned int num_packets;
	unsigned int packet_size;
	unsigned char ep, counter;
	unsigned char *rcvbuf;
	struct st5481_adapter *adapter;
	struct hisax_if *hisax_if;
	};

	int st5481_setup_in(struct st5481_in *in);
	void st5481_release_in(struct st5481_in *in);
	void st5481_in_mode(struct st5481_in *in, int mode);

	struct st5481_bcs {
	struct hisax_b_if b_if;
	struct st5481_adapter *adapter;
	struct st5481_in b_in;
	struct st5481_b_out b_out;
	int channel;
	int mode;
	};

	struct st5481_adapter {
	int number_of_leds;
	struct usb_device *usb_dev;
	struct hisax_d_if hisax_d_if;

	struct st5481_ctrl ctrl;
	struct st5481_intr intr;
	struct st5481_in d_in;
	struct st5481_d_out d_out;

	unsigned char leds;
	unsigned int led_counter;

	unsigned long event;

	struct FsmInst l1m;
	struct FsmTimer timer;

	struct st5481_bcs bcs[2];
	};

	#define TIMER3_VALUE 7000

	/* ======================================================================
	*
	*/

	/*
	* Submit an URB with error reporting. This is a macro so
	* the __func__ returns the caller function name.
	*/
	#define SUBMIT_URB(urb, mem_flags) \
	({ \
	int status; \
	if ((status = usb_submit_urb(urb, mem_flags)) < 0) { \
	WARNING("usb_submit_urb failed,status=%d", status); \
	} \
	status; \
	})

	/*
	* USB double buffering, return the URB index (0 or 1).
	*/
	static inline int get_buf_nr(struct urb urbs[], struct urb urb)
	{
	return (urbs[0] == urb ? 0 : 1);
	}

	/* ---------------------------------------------------------------------- */

	/* B Channel */

	int st5481_setup_b(struct st5481_bcs *bcs);
	void st5481_release_b(struct st5481_bcs *bcs);
	void st5481_d_l2l1(struct hisax_if hisax_d_if, int pr, void arg);

	/* D Channel */

	int st5481_setup_d(struct st5481_adapter *adapter);
	void st5481_release_d(struct st5481_adapter *adapter);
	void st5481_b_l2l1(struct hisax_if b_if, int pr, void arg);
	int st5481_d_init(void);
	void st5481_d_exit(void);

	/* USB */
	void st5481_ph_command(struct st5481_adapter *adapter, unsigned int command);
	int st5481_setup_isocpipes(struct urb urb[2], struct usb_device dev,
	unsigned int pipe, int num_packets,
	int packet_size, int buf_size,
	usb_complete_t complete, void *context);
	void st5481_release_isocpipes(struct urb *urb[2]);

	void st5481_usb_pipe_reset(struct st5481_adapter *adapter,
	u_char pipe, ctrl_complete_t complete, void *context);
	void st5481_usb_device_ctrl_msg(struct st5481_adapter *adapter,
	u8 request, u16 value,
	ctrl_complete_t complete, void *context);
	int st5481_setup_usb(struct st5481_adapter *adapter);
	void st5481_release_usb(struct st5481_adapter *adapter);
	void st5481_start(struct st5481_adapter *adapter);
	void st5481_stop(struct st5481_adapter *adapter);

	// ----------------------------------------------------------------------
	// debugging macros

	#define __debug_variable st5481_debug
	#include "hisax_debug.h"

	extern int st5481_debug;

	#ifdef CONFIG_HISAX_DEBUG

	#define DBG_ISO_PACKET(level, urb) \
	if (level & __debug_variable) dump_iso_packet(__func__, urb)

	static void __attribute__((unused))
	dump_iso_packet(const char name, struct urb urb)
	{
	int i, j;
	int len, ofs;
	u_char *data;

	printk(KERN_DEBUG "%s: packets=%d,errors=%d\n",
	name, urb->number_of_packets, urb->error_count);
	for (i = 0; i < urb->number_of_packets; ++i) {
	if (urb->pipe & USB_DIR_IN) {
	len = urb->iso_frame_desc[i].actual_length;
	} else {
	len = urb->iso_frame_desc[i].length;
	}
	ofs = urb->iso_frame_desc[i].offset;
	printk(KERN_DEBUG "len=%.2d,ofs=%.3d ", len, ofs);
	if (len) {
	data = urb->transfer_buffer + ofs;
	for (j = 0; j < len; j++) {
	printk("%.2x", data[j]);
	}
	}
	printk("\n");
	}
	}

	static inline const char *ST5481_CMD_string(int evt)
	{
	static char s[16];

	switch (evt) {
	case ST5481_CMD_DR: return "DR";
	case ST5481_CMD_RES: return "RES";
	case ST5481_CMD_TM1: return "TM1";
	case ST5481_CMD_TM2: return "TM2";
	case ST5481_CMD_PUP: return "PUP";
	case ST5481_CMD_AR8: return "AR8";
	case ST5481_CMD_AR10: return "AR10";
	case ST5481_CMD_ARL: return "ARL";
	case ST5481_CMD_PDN: return "PDN";
	};

	sprintf(s, "0x%x", evt);
	return s;
	}

	#else

	#define DBG_ISO_PACKET(level, urb) do {} while (0)

	#endif



	#endif