LXR linux/drivers/isdn/hisax/hscx.c

   1/* $Id: hscx.c,v 1.24.2.4 2004/01/24 20:47:23 keil Exp $
   2 *
   3 * HSCX specific routines
   4 *
   5 * Author       Karsten Keil
   6 * Copyright    by Karsten Keil      <keil@isdn4linux.de>
   7 * 
   8 * This software may be used and distributed according to the terms
   9 * of the GNU General Public License, incorporated herein by reference.
  10 *
  11 */
  12
  13#include <linux/init.h>
  14#include "hisax.h"
  15#include "hscx.h"
  16#include "isac.h"
  17#include "isdnl1.h"
  18#include <linux/interrupt.h>
  19#include <linux/slab.h>
  20
  21static char *HSCXVer[] =
  22{"A1", "?1", "A2", "?3", "A3", "V2.1", "?6", "?7",
  23 "?8", "?9", "?10", "?11", "?12", "?13", "?14", "???"};
  24
  25int
  26HscxVersion(struct IsdnCardState *cs, char *s)
  27{
  28        int verA, verB;
  29
  30        verA = cs->BC_Read_Reg(cs, 0, HSCX_VSTR) & 0xf;
  31        verB = cs->BC_Read_Reg(cs, 1, HSCX_VSTR) & 0xf;
  32        printk(KERN_INFO "%s HSCX version A: %s  B: %s\n", s,
  33               HSCXVer[verA], HSCXVer[verB]);
  34        if ((verA == 0) | (verA == 0xf) | (verB == 0) | (verB == 0xf))
  35                return (1);
  36        else
  37                return (0);
  38}
  39
  40void
  41modehscx(struct BCState *bcs, int mode, int bc)
  42{
  43        struct IsdnCardState *cs = bcs->cs;
  44        int hscx = bcs->hw.hscx.hscx;
  45
  46        if (cs->debug & L1_DEB_HSCX)
  47                debugl1(cs, "hscx %c mode %d ichan %d",
  48                        'A' + hscx, mode, bc);
  49        bcs->mode = mode;
  50        bcs->channel = bc;
  51        cs->BC_Write_Reg(cs, hscx, HSCX_XAD1, 0xFF);
  52        cs->BC_Write_Reg(cs, hscx, HSCX_XAD2, 0xFF);
  53        cs->BC_Write_Reg(cs, hscx, HSCX_RAH2, 0xFF);
  54        cs->BC_Write_Reg(cs, hscx, HSCX_XBCH, 0x0);
  55        cs->BC_Write_Reg(cs, hscx, HSCX_RLCR, 0x0);
  56        cs->BC_Write_Reg(cs, hscx, HSCX_CCR1,
  57                test_bit(HW_IPAC, &cs->HW_Flags) ? 0x82 : 0x85);
  58        cs->BC_Write_Reg(cs, hscx, HSCX_CCR2, 0x30);
  59        cs->BC_Write_Reg(cs, hscx, HSCX_XCCR, 7);
  60        cs->BC_Write_Reg(cs, hscx, HSCX_RCCR, 7);
  61
  62        /* Switch IOM 1 SSI */
  63        if (test_bit(HW_IOM1, &cs->HW_Flags) && (hscx == 0))
  64                bc = 1 - bc;
  65
  66        if (bc == 0) {
  67                cs->BC_Write_Reg(cs, hscx, HSCX_TSAX,
  68                              test_bit(HW_IOM1, &cs->HW_Flags) ? 0x7 : bcs->hw.hscx.tsaxr0);
  69                cs->BC_Write_Reg(cs, hscx, HSCX_TSAR,
  70                              test_bit(HW_IOM1, &cs->HW_Flags) ? 0x7 : bcs->hw.hscx.tsaxr0);
  71        } else {
  72                cs->BC_Write_Reg(cs, hscx, HSCX_TSAX, bcs->hw.hscx.tsaxr1);
  73                cs->BC_Write_Reg(cs, hscx, HSCX_TSAR, bcs->hw.hscx.tsaxr1);
  74        }
  75        switch (mode) {
  76                case (L1_MODE_NULL):
  77                        cs->BC_Write_Reg(cs, hscx, HSCX_TSAX, 0x1f);
  78                        cs->BC_Write_Reg(cs, hscx, HSCX_TSAR, 0x1f);
  79                        cs->BC_Write_Reg(cs, hscx, HSCX_MODE, 0x84);
  80                        break;
  81                case (L1_MODE_TRANS):
  82                        cs->BC_Write_Reg(cs, hscx, HSCX_MODE, 0xe4);
  83                        break;
  84                case (L1_MODE_HDLC):
  85                        cs->BC_Write_Reg(cs, hscx, HSCX_CCR1,
  86                                test_bit(HW_IPAC, &cs->HW_Flags) ? 0x8a : 0x8d);
  87                        cs->BC_Write_Reg(cs, hscx, HSCX_MODE, 0x8c);
  88                        break;
  89        }
  90        if (mode)
  91                cs->BC_Write_Reg(cs, hscx, HSCX_CMDR, 0x41);
  92        cs->BC_Write_Reg(cs, hscx, HSCX_ISTA, 0x00);
  93}
  94
  95void
  96hscx_l2l1(struct PStack *st, int pr, void *arg)
  97{
  98        struct BCState *bcs = st->l1.bcs;
  99        u_long flags;
 100        struct sk_buff *skb = arg;
 101
 102        switch (pr) {
 103                case (PH_DATA | REQUEST):
 104                        spin_lock_irqsave(&bcs->cs->lock, flags);
 105                        if (bcs->tx_skb) {
 106                                skb_queue_tail(&bcs->squeue, skb);
 107                        } else {
 108                                bcs->tx_skb = skb;
 109                                test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
 110                                bcs->hw.hscx.count = 0;
 111                                bcs->cs->BC_Send_Data(bcs);
 112                        }
 113                        spin_unlock_irqrestore(&bcs->cs->lock, flags);
 114                        break;
 115                case (PH_PULL | INDICATION):
 116                        spin_lock_irqsave(&bcs->cs->lock, flags);
 117                        if (bcs->tx_skb) {
 118                                printk(KERN_WARNING "hscx_l2l1: this shouldn't happen\n");
 119                        } else {
 120                                test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
 121                                bcs->tx_skb = skb;
 122                                bcs->hw.hscx.count = 0;
 123                                bcs->cs->BC_Send_Data(bcs);
 124                        }
 125                        spin_unlock_irqrestore(&bcs->cs->lock, flags);
 126                        break;
 127                case (PH_PULL | REQUEST):
 128                        if (!bcs->tx_skb) {
 129                                test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 130                                st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
 131                        } else
 132                                test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
 133                        break;
 134                case (PH_ACTIVATE | REQUEST):
 135                        spin_lock_irqsave(&bcs->cs->lock, flags);
 136                        test_and_set_bit(BC_FLG_ACTIV, &bcs->Flag);
 137                        modehscx(bcs, st->l1.mode, st->l1.bc);
 138                        spin_unlock_irqrestore(&bcs->cs->lock, flags);
 139                        l1_msg_b(st, pr, arg);
 140                        break;
 141                case (PH_DEACTIVATE | REQUEST):
 142                        l1_msg_b(st, pr, arg);
 143                        break;
 144                case (PH_DEACTIVATE | CONFIRM):
 145                        spin_lock_irqsave(&bcs->cs->lock, flags);
 146                        test_and_clear_bit(BC_FLG_ACTIV, &bcs->Flag);
 147                        test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
 148                        modehscx(bcs, 0, st->l1.bc);
 149                        spin_unlock_irqrestore(&bcs->cs->lock, flags);
 150                        st->l1.l1l2(st, PH_DEACTIVATE | CONFIRM, NULL);
 151                        break;
 152        }
 153}
 154
 155static void
 156close_hscxstate(struct BCState *bcs)
 157{
 158        modehscx(bcs, 0, bcs->channel);
 159        if (test_and_clear_bit(BC_FLG_INIT, &bcs->Flag)) {
 160                kfree(bcs->hw.hscx.rcvbuf);
 161                bcs->hw.hscx.rcvbuf = NULL;
 162                kfree(bcs->blog);
 163                bcs->blog = NULL;
 164                skb_queue_purge(&bcs->rqueue);
 165                skb_queue_purge(&bcs->squeue);
 166                if (bcs->tx_skb) {
 167                        dev_kfree_skb_any(bcs->tx_skb);
 168                        bcs->tx_skb = NULL;
 169                        test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
 170                }
 171        }
 172}
 173
 174int
 175open_hscxstate(struct IsdnCardState *cs, struct BCState *bcs)
 176{
 177        if (!test_and_set_bit(BC_FLG_INIT, &bcs->Flag)) {
 178                if (!(bcs->hw.hscx.rcvbuf = kmalloc(HSCX_BUFMAX, GFP_ATOMIC))) {
 179                        printk(KERN_WARNING
 180                                "HiSax: No memory for hscx.rcvbuf\n");
 181                        test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
 182                        return (1);
 183                }
 184                if (!(bcs->blog = kmalloc(MAX_BLOG_SPACE, GFP_ATOMIC))) {
 185                        printk(KERN_WARNING
 186                                "HiSax: No memory for bcs->blog\n");
 187                        test_and_clear_bit(BC_FLG_INIT, &bcs->Flag);
 188                        kfree(bcs->hw.hscx.rcvbuf);
 189                        bcs->hw.hscx.rcvbuf = NULL;
 190                        return (2);
 191                }
 192                skb_queue_head_init(&bcs->rqueue);
 193                skb_queue_head_init(&bcs->squeue);
 194        }
 195        bcs->tx_skb = NULL;
 196        test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
 197        bcs->event = 0;
 198        bcs->hw.hscx.rcvidx = 0;
 199        bcs->tx_cnt = 0;
 200        return (0);
 201}
 202
 203static int
 204setstack_hscx(struct PStack *st, struct BCState *bcs)
 205{
 206        bcs->channel = st->l1.bc;
 207        if (open_hscxstate(st->l1.hardware, bcs))
 208                return (-1);
 209        st->l1.bcs = bcs;
 210        st->l2.l2l1 = hscx_l2l1;
 211        setstack_manager(st);
 212        bcs->st = st;
 213        setstack_l1_B(st);
 214        return (0);
 215}
 216
 217void
 218clear_pending_hscx_ints(struct IsdnCardState *cs)
 219{
 220        int val, eval;
 221
 222        val = cs->BC_Read_Reg(cs, 1, HSCX_ISTA);
 223        debugl1(cs, "HSCX B ISTA %x", val);
 224        if (val & 0x01) {
 225                eval = cs->BC_Read_Reg(cs, 1, HSCX_EXIR);
 226                debugl1(cs, "HSCX B EXIR %x", eval);
 227        }
 228        if (val & 0x02) {
 229                eval = cs->BC_Read_Reg(cs, 0, HSCX_EXIR);
 230                debugl1(cs, "HSCX A EXIR %x", eval);
 231        }
 232        val = cs->BC_Read_Reg(cs, 0, HSCX_ISTA);
 233        debugl1(cs, "HSCX A ISTA %x", val);
 234        val = cs->BC_Read_Reg(cs, 1, HSCX_STAR);
 235        debugl1(cs, "HSCX B STAR %x", val);
 236        val = cs->BC_Read_Reg(cs, 0, HSCX_STAR);
 237        debugl1(cs, "HSCX A STAR %x", val);
 238        /* disable all IRQ */
 239        cs->BC_Write_Reg(cs, 0, HSCX_MASK, 0xFF);
 240        cs->BC_Write_Reg(cs, 1, HSCX_MASK, 0xFF);
 241}
 242
 243void
 244inithscx(struct IsdnCardState *cs)
 245{
 246        cs->bcs[0].BC_SetStack = setstack_hscx;
 247        cs->bcs[1].BC_SetStack = setstack_hscx;
 248        cs->bcs[0].BC_Close = close_hscxstate;
 249        cs->bcs[1].BC_Close = close_hscxstate;
 250        cs->bcs[0].hw.hscx.hscx = 0;
 251        cs->bcs[1].hw.hscx.hscx = 1;
 252        cs->bcs[0].hw.hscx.tsaxr0 = 0x2f;
 253        cs->bcs[0].hw.hscx.tsaxr1 = 3;
 254        cs->bcs[1].hw.hscx.tsaxr0 = 0x2f;
 255        cs->bcs[1].hw.hscx.tsaxr1 = 3;
 256        modehscx(cs->bcs, 0, 0);
 257        modehscx(cs->bcs + 1, 0, 0);
 258}
 259
 260void
 261inithscxisac(struct IsdnCardState *cs, int part)
 262{
 263        if (part & 1) {
 264                clear_pending_isac_ints(cs);
 265                clear_pending_hscx_ints(cs);
 266                initisac(cs);
 267                inithscx(cs);
 268        }
 269        if (part & 2) {
 270                /* Reenable all IRQ */
 271                cs->writeisac(cs, ISAC_MASK, 0);
 272                cs->BC_Write_Reg(cs, 0, HSCX_MASK, 0);
 273                cs->BC_Write_Reg(cs, 1, HSCX_MASK, 0);
 274                /* RESET Receiver and Transmitter */
 275                cs->writeisac(cs, ISAC_CMDR, 0x41);
 276        }
 277}
 278