/*
* 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 {
struct list_head list;
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