diff options
Diffstat (limited to 'kernel/drivers/isdn/pcbit/layer2.h')
| -rw-r--r-- | kernel/drivers/isdn/pcbit/layer2.h | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/kernel/drivers/isdn/pcbit/layer2.h b/kernel/drivers/isdn/pcbit/layer2.h new file mode 100644 index 000000000..be1327bc1 --- /dev/null +++ b/kernel/drivers/isdn/pcbit/layer2.h @@ -0,0 +1,281 @@ +/* + * PCBIT-D low-layer interface definitions + * + * Copyright (C) 1996 Universidade de Lisboa + * + * Written by Pedro Roque Marques (roque@di.fc.ul.pt) + * + * This software may be used and distributed according to the terms of + * the GNU General Public License, incorporated herein by reference. + */ + +/* + * 19991203 - Fernando Carvalho - takion@superbofh.org + * Hacked to compile with egcs and run with current version of isdn modules + */ + +#ifndef LAYER2_H +#define LAYER2_H + +#include <linux/interrupt.h> + +#include <asm/byteorder.h> + +#define BANK1 0x0000U /* PC -> Board */ +#define BANK2 0x01ffU /* Board -> PC */ +#define BANK3 0x03feU /* Att Board */ +#define BANK4 0x03ffU /* Att PC */ + +#define BANKLEN 0x01FFU + +#define LOAD_ZONE_START 0x03f8U +#define LOAD_ZONE_END 0x03fdU + +#define LOAD_RETRY 18000000 + + + +/* TAM - XX - C - S - NUM */ +#define PREHDR_LEN 8 +/* TT - M - I - TH - TD */ +#define FRAME_HDR_LEN 8 + +#define MSG_CONN_REQ 0x08000100 +#define MSG_CONN_CONF 0x00000101 +#define MSG_CONN_IND 0x00000102 +#define MSG_CONN_RESP 0x08000103 + +#define MSG_CONN_ACTV_REQ 0x08000300 +#define MSG_CONN_ACTV_CONF 0x00000301 +#define MSG_CONN_ACTV_IND 0x00000302 +#define MSG_CONN_ACTV_RESP 0x08000303 + +#define MSG_DISC_REQ 0x08000400 +#define MSG_DISC_CONF 0x00000401 +#define MSG_DISC_IND 0x00000402 +#define MSG_DISC_RESP 0x08000403 + +#define MSG_TDATA_REQ 0x0908E200 +#define MSG_TDATA_CONF 0x0000E201 +#define MSG_TDATA_IND 0x0000E202 +#define MSG_TDATA_RESP 0x0908E203 + +#define MSG_SELP_REQ 0x09004000 +#define MSG_SELP_CONF 0x00004001 + +#define MSG_ACT_TRANSP_REQ 0x0908E000 +#define MSG_ACT_TRANSP_CONF 0x0000E001 + +#define MSG_STPROT_REQ 0x09004100 +#define MSG_STPROT_CONF 0x00004101 + +#define MSG_PING188_REQ 0x09030500 +#define MSG_PING188_CONF 0x000005bc + +#define MSG_WATCH188 0x09030400 + +#define MSG_API_ON 0x08020102 +#define MSG_POOL_PCBIT 0x08020400 +#define MSG_POOL_PCBIT_CONF 0x00000401 + +#define MSG_INFO_IND 0x00002602 +#define MSG_INFO_RESP 0x08002603 + +#define MSG_DEBUG_188 0x0000ff00 + +/* + + long 4 3 2 1 + Intel 1 2 3 4 +*/ + +#ifdef __LITTLE_ENDIAN +#define SET_MSG_SCMD(msg, ch) (msg = (msg & 0xffffff00) | (((ch) & 0xff))) +#define SET_MSG_CMD(msg, ch) (msg = (msg & 0xffff00ff) | (((ch) & 0xff) << 8)) +#define SET_MSG_PROC(msg, ch) (msg = (msg & 0xff00ffff) | (((ch) & 0xff) << 16)) +#define SET_MSG_CPU(msg, ch) (msg = (msg & 0x00ffffff) | (((ch) & 0xff) << 24)) + +#define GET_MSG_SCMD(msg) ((msg) & 0xFF) +#define GET_MSG_CMD(msg) ((msg) >> 8 & 0xFF) +#define GET_MSG_PROC(msg) ((msg) >> 16 & 0xFF) +#define GET_MSG_CPU(msg) ((msg) >> 24) + +#else +#error "Non-Intel CPU" +#endif + +#define MAX_QUEUED 7 + +#define SCHED_READ 0x01 +#define SCHED_WRITE 0x02 + +#define SET_RUN_TIMEOUT 2 * HZ /* 2 seconds */ + +struct frame_buf { + ulong msg; + unsigned int refnum; + unsigned int dt_len; + unsigned int hdr_len; + struct sk_buff *skb; + unsigned int copied; + struct frame_buf *next; +}; + +extern int pcbit_l2_write(struct pcbit_dev *dev, ulong msg, ushort refnum, + struct sk_buff *skb, unsigned short hdr_len); + +extern irqreturn_t pcbit_irq_handler(int interrupt, void *); + +extern struct pcbit_dev *dev_pcbit[MAX_PCBIT_CARDS]; + +#ifdef DEBUG +static __inline__ void log_state(struct pcbit_dev *dev) { + printk(KERN_DEBUG "writeptr = %ld\n", + (ulong) (dev->writeptr - dev->sh_mem)); + printk(KERN_DEBUG "readptr = %ld\n", + (ulong) (dev->readptr - (dev->sh_mem + BANK2))); + printk(KERN_DEBUG "{rcv_seq=%01x, send_seq=%01x, unack_seq=%01x}\n", + dev->rcv_seq, dev->send_seq, dev->unack_seq); +} +#endif + +static __inline__ struct pcbit_dev *chan2dev(struct pcbit_chan *chan) +{ + struct pcbit_dev *dev; + int i; + + + for (i = 0; i < MAX_PCBIT_CARDS; i++) + if ((dev = dev_pcbit[i])) + if (dev->b1 == chan || dev->b2 == chan) + return dev; + return NULL; + +} + +static __inline__ struct pcbit_dev *finddev(int id) +{ + struct pcbit_dev *dev; + int i; + + for (i = 0; i < MAX_PCBIT_CARDS; i++) + if ((dev = dev_pcbit[i])) + if (dev->id == id) + return dev; + return NULL; +} + + +/* + * Support routines for reading and writing in the board + */ + +static __inline__ void pcbit_writeb(struct pcbit_dev *dev, unsigned char dt) +{ + writeb(dt, dev->writeptr++); + if (dev->writeptr == dev->sh_mem + BANKLEN) + dev->writeptr = dev->sh_mem; +} + +static __inline__ void pcbit_writew(struct pcbit_dev *dev, unsigned short dt) +{ + int dist; + + dist = BANKLEN - (dev->writeptr - dev->sh_mem); + switch (dist) { + case 2: + writew(dt, dev->writeptr); + dev->writeptr = dev->sh_mem; + break; + case 1: + writeb((u_char) (dt & 0x00ffU), dev->writeptr); + dev->writeptr = dev->sh_mem; + writeb((u_char) (dt >> 8), dev->writeptr++); + break; + default: + writew(dt, dev->writeptr); + dev->writeptr += 2; + break; + }; +} + +static __inline__ void memcpy_topcbit(struct pcbit_dev *dev, u_char *data, + int len) +{ + int diff; + + diff = len - (BANKLEN - (dev->writeptr - dev->sh_mem)); + + if (diff > 0) + { + memcpy_toio(dev->writeptr, data, len - diff); + memcpy_toio(dev->sh_mem, data + (len - diff), diff); + dev->writeptr = dev->sh_mem + diff; + } + else + { + memcpy_toio(dev->writeptr, data, len); + + dev->writeptr += len; + if (diff == 0) + dev->writeptr = dev->sh_mem; + } +} + +static __inline__ unsigned char pcbit_readb(struct pcbit_dev *dev) +{ + unsigned char val; + + val = readb(dev->readptr++); + if (dev->readptr == dev->sh_mem + BANK2 + BANKLEN) + dev->readptr = dev->sh_mem + BANK2; + + return val; +} + +static __inline__ unsigned short pcbit_readw(struct pcbit_dev *dev) +{ + int dist; + unsigned short val; + + dist = BANKLEN - (dev->readptr - (dev->sh_mem + BANK2)); + switch (dist) { + case 2: + val = readw(dev->readptr); + dev->readptr = dev->sh_mem + BANK2; + break; + case 1: + val = readb(dev->readptr); + dev->readptr = dev->sh_mem + BANK2; + val = (readb(dev->readptr++) << 8) | val; + break; + default: + val = readw(dev->readptr); + dev->readptr += 2; + break; + }; + return val; +} + +static __inline__ void memcpy_frompcbit(struct pcbit_dev *dev, u_char *data, int len) +{ + int diff; + + diff = len - (BANKLEN - (dev->readptr - (dev->sh_mem + BANK2))); + if (diff > 0) + { + memcpy_fromio(data, dev->readptr, len - diff); + memcpy_fromio(data + (len - diff), dev->sh_mem + BANK2 , diff); + dev->readptr = dev->sh_mem + BANK2 + diff; + } + else + { + memcpy_fromio(data, dev->readptr, len); + dev->readptr += len; + if (diff == 0) + dev->readptr = dev->sh_mem + BANK2; + } +} + + +#endif |