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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 | /* $Id: hscx_irq.c,v 1.13 1999/10/14 20:25:28 keil Exp $ * hscx_irq.c low level b-channel stuff for Siemens HSCX * * Author Karsten Keil (keil@isdn4linux.de) * * This is an include file for fast inline IRQ stuff * * $Log: hscx_irq.c,v $ * Revision 1.13 1999/10/14 20:25:28 keil * add a statistic for error monitoring * * Revision 1.12 1999/07/01 08:11:42 keil * Common HiSax version for 2.0, 2.1, 2.2 and 2.3 kernel * * Revision 1.11 1998/11/15 23:54:49 keil * changes from 2.0 * * Revision 1.10 1998/08/13 23:36:35 keil * HiSax 3.1 - don't work stable with current LinkLevel * * Revision 1.9 1998/06/24 14:44:51 keil * Fix recovery of TX IRQ loss * * Revision 1.8 1998/04/10 10:35:22 paul * fixed (silly?) warnings from egcs on Alpha. * * Revision 1.7 1998/02/12 23:07:37 keil * change for 2.1.86 (removing FREE_READ/FREE_WRITE from [dev]_kfree_skb() * * Revision 1.6 1997/10/29 19:01:07 keil * changes for 2.1 * * Revision 1.5 1997/10/01 09:21:35 fritz * Removed old compatibility stuff for 2.0.X kernels. * From now on, this code is for 2.1.X ONLY! * Old stuff is still in the separate branch. * * Revision 1.4 1997/08/15 17:48:02 keil * cosmetic * * Revision 1.3 1997/07/27 21:38:36 keil * new B-channel interface * * Revision 1.2 1997/06/26 11:16:19 keil * first version * * */ static inline void waitforCEC(struct IsdnCardState *cs, int hscx) { int to = 50; while ((READHSCX(cs, hscx, HSCX_STAR) & 0x04) && to) { udelay(1); to--; } if (!to) printk(KERN_WARNING "HiSax: waitforCEC timeout\n"); } static inline void waitforXFW(struct IsdnCardState *cs, int hscx) { int to = 50; while ((!(READHSCX(cs, hscx, HSCX_STAR) & 0x44) == 0x40) && to) { udelay(1); to--; } if (!to) printk(KERN_WARNING "HiSax: waitforXFW timeout\n"); } static inline void WriteHSCXCMDR(struct IsdnCardState *cs, int hscx, u_char data) { long flags; save_flags(flags); cli(); waitforCEC(cs, hscx); WRITEHSCX(cs, hscx, HSCX_CMDR, data); restore_flags(flags); } static void hscx_empty_fifo(struct BCState *bcs, int count) { u_char *ptr; struct IsdnCardState *cs = bcs->cs; long flags; if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO)) debugl1(cs, "hscx_empty_fifo"); if (bcs->hw.hscx.rcvidx + count > HSCX_BUFMAX) { if (cs->debug & L1_DEB_WARN) debugl1(cs, "hscx_empty_fifo: incoming packet too large"); WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x80); bcs->hw.hscx.rcvidx = 0; return; } ptr = bcs->hw.hscx.rcvbuf + bcs->hw.hscx.rcvidx; bcs->hw.hscx.rcvidx += count; save_flags(flags); cli(); READHSCXFIFO(cs, bcs->hw.hscx.hscx, ptr, count); WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x80); restore_flags(flags); if (cs->debug & L1_DEB_HSCX_FIFO) { char *t = bcs->blog; t += sprintf(t, "hscx_empty_fifo %c cnt %d", bcs->hw.hscx.hscx ? 'B' : 'A', count); QuickHex(t, ptr, count); debugl1(cs, bcs->blog); } } static void hscx_fill_fifo(struct BCState *bcs) { struct IsdnCardState *cs = bcs->cs; int more, count; int fifo_size = test_bit(HW_IPAC, &cs->HW_Flags)? 64: 32; u_char *ptr; long flags; if ((cs->debug & L1_DEB_HSCX) && !(cs->debug & L1_DEB_HSCX_FIFO)) debugl1(cs, "hscx_fill_fifo"); if (!bcs->tx_skb) return; if (bcs->tx_skb->len <= 0) return; more = (bcs->mode == L1_MODE_TRANS) ? 1 : 0; if (bcs->tx_skb->len > fifo_size) { more = !0; count = fifo_size; } else count = bcs->tx_skb->len; waitforXFW(cs, bcs->hw.hscx.hscx); save_flags(flags); cli(); ptr = bcs->tx_skb->data; skb_pull(bcs->tx_skb, count); bcs->tx_cnt -= count; bcs->hw.hscx.count += count; WRITEHSCXFIFO(cs, bcs->hw.hscx.hscx, ptr, count); WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, more ? 0x8 : 0xa); restore_flags(flags); if (cs->debug & L1_DEB_HSCX_FIFO) { char *t = bcs->blog; t += sprintf(t, "hscx_fill_fifo %c cnt %d", bcs->hw.hscx.hscx ? 'B' : 'A', count); QuickHex(t, ptr, count); debugl1(cs, bcs->blog); } } static inline void hscx_interrupt(struct IsdnCardState *cs, u_char val, u_char hscx) { u_char r; struct BCState *bcs = cs->bcs + hscx; struct sk_buff *skb; int fifo_size = test_bit(HW_IPAC, &cs->HW_Flags)? 64: 32; int count; if (!test_bit(BC_FLG_INIT, &bcs->Flag)) return; if (val & 0x80) { /* RME */ r = READHSCX(cs, hscx, HSCX_RSTA); if ((r & 0xf0) != 0xa0) { if (!(r & 0x80)) { if (cs->debug & L1_DEB_WARN) debugl1(cs, "HSCX invalid frame"); #ifdef ERROR_STATISTIC bcs->err_inv++; #endif } if ((r & 0x40) && bcs->mode) { if (cs->debug & L1_DEB_WARN) debugl1(cs, "HSCX RDO mode=%d", bcs->mode); #ifdef ERROR_STATISTIC bcs->err_rdo++; #endif } if (!(r & 0x20)) { if (cs->debug & L1_DEB_WARN) debugl1(cs, "HSCX CRC error"); #ifdef ERROR_STATISTIC bcs->err_crc++; #endif } WriteHSCXCMDR(cs, hscx, 0x80); } else { count = READHSCX(cs, hscx, HSCX_RBCL) & ( test_bit(HW_IPAC, &cs->HW_Flags)? 0x3f: 0x1f); if (count == 0) count = fifo_size; hscx_empty_fifo(bcs, count); if ((count = bcs->hw.hscx.rcvidx - 1) > 0) { if (cs->debug & L1_DEB_HSCX_FIFO) debugl1(cs, "HX Frame %d", count); if (!(skb = dev_alloc_skb(count))) printk(KERN_WARNING "HSCX: receive out of memory\n"); else { memcpy(skb_put(skb, count), bcs->hw.hscx.rcvbuf, count); skb_queue_tail(&bcs->rqueue, skb); } } } bcs->hw.hscx.rcvidx = 0; hscx_sched_event(bcs, B_RCVBUFREADY); } if (val & 0x40) { /* RPF */ hscx_empty_fifo(bcs, fifo_size); if (bcs->mode == L1_MODE_TRANS) { /* receive audio data */ if (!(skb = dev_alloc_skb(fifo_size))) printk(KERN_WARNING "HiSax: receive out of memory\n"); else { memcpy(skb_put(skb, fifo_size), bcs->hw.hscx.rcvbuf, fifo_size); skb_queue_tail(&bcs->rqueue, skb); } bcs->hw.hscx.rcvidx = 0; hscx_sched_event(bcs, B_RCVBUFREADY); } } if (val & 0x10) { /* XPR */ if (bcs->tx_skb) { if (bcs->tx_skb->len) { hscx_fill_fifo(bcs); return; } else { if (bcs->st->lli.l1writewakeup && (PACKET_NOACK != bcs->tx_skb->pkt_type)) bcs->st->lli.l1writewakeup(bcs->st, bcs->hw.hscx.count); dev_kfree_skb(bcs->tx_skb); bcs->hw.hscx.count = 0; bcs->tx_skb = NULL; } } if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) { bcs->hw.hscx.count = 0; test_and_set_bit(BC_FLG_BUSY, &bcs->Flag); hscx_fill_fifo(bcs); } else { test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag); hscx_sched_event(bcs, B_XMTBUFREADY); } } } static inline void hscx_int_main(struct IsdnCardState *cs, u_char val) { u_char exval; struct BCState *bcs; if (val & 0x01) { bcs = cs->bcs + 1; exval = READHSCX(cs, 1, HSCX_EXIR); if (exval & 0x40) { if (bcs->mode == 1) hscx_fill_fifo(bcs); else { #ifdef ERROR_STATISTIC bcs->err_tx++; #endif /* Here we lost an TX interrupt, so * restart transmitting the whole frame. */ if (bcs->tx_skb) { skb_push(bcs->tx_skb, bcs->hw.hscx.count); bcs->tx_cnt += bcs->hw.hscx.count; bcs->hw.hscx.count = 0; } WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x01); if (cs->debug & L1_DEB_WARN) debugl1(cs, "HSCX B EXIR %x Lost TX", exval); } } else if (cs->debug & L1_DEB_HSCX) debugl1(cs, "HSCX B EXIR %x", exval); } if (val & 0xf8) { if (cs->debug & L1_DEB_HSCX) debugl1(cs, "HSCX B interrupt %x", val); hscx_interrupt(cs, val, 1); } if (val & 0x02) { bcs = cs->bcs; exval = READHSCX(cs, 0, HSCX_EXIR); if (exval & 0x40) { if (bcs->mode == L1_MODE_TRANS) hscx_fill_fifo(bcs); else { /* Here we lost an TX interrupt, so * restart transmitting the whole frame. */ #ifdef ERROR_STATISTIC bcs->err_tx++; #endif if (bcs->tx_skb) { skb_push(bcs->tx_skb, bcs->hw.hscx.count); bcs->tx_cnt += bcs->hw.hscx.count; bcs->hw.hscx.count = 0; } WriteHSCXCMDR(cs, bcs->hw.hscx.hscx, 0x01); if (cs->debug & L1_DEB_WARN) debugl1(cs, "HSCX A EXIR %x Lost TX", exval); } } else if (cs->debug & L1_DEB_HSCX) debugl1(cs, "HSCX A EXIR %x", exval); } if (val & 0x04) { exval = READHSCX(cs, 0, HSCX_ISTA); if (cs->debug & L1_DEB_HSCX) debugl1(cs, "HSCX A interrupt %x", exval); hscx_interrupt(cs, exval, 0); } } |