1/* SPDX-License-Identifier: GPL-2.0-only */ 2.psize 0 3/* 4 wanXL serial card driver for Linux 5 card firmware part 6 7 Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl> 8 9 10 11 12 13 DPRAM BDs: 14 0x000 - 0x050 TX#0 0x050 - 0x140 RX#0 15 0x140 - 0x190 TX#1 0x190 - 0x280 RX#1 16 0x280 - 0x2D0 TX#2 0x2D0 - 0x3C0 RX#2 17 0x3C0 - 0x410 TX#3 0x410 - 0x500 RX#3 18 19 20 000 5FF 1536 Bytes Dual-Port RAM User Data / BDs 21 600 6FF 256 Bytes Dual-Port RAM User Data / BDs 22 700 7FF 256 Bytes Dual-Port RAM User Data / BDs 23 C00 CBF 192 Bytes Dual-Port RAM Parameter RAM Page 1 24 D00 DBF 192 Bytes Dual-Port RAM Parameter RAM Page 2 25 E00 EBF 192 Bytes Dual-Port RAM Parameter RAM Page 3 26 F00 FBF 192 Bytes Dual-Port RAM Parameter RAM Page 4 27 28 local interrupts level 29 NMI 7 30 PIT timer, CPM (RX/TX complete) 4 31 PCI9060 DMA and PCI doorbells 3 32 Cable - not used 1 33*/ 34 35#include <linux/hdlc.h> 36#include <linux/hdlc/ioctl.h> 37#include "wanxl.h" 38 39/* memory addresses and offsets */ 40 41MAX_RAM_SIZE = 16 * 1024 * 1024 // max RAM supported by hardware 42 43PCI9060_VECTOR = 0x0000006C 44CPM_IRQ_BASE = 0x40 45ERROR_VECTOR = CPM_IRQ_BASE * 4 46SCC1_VECTOR = (CPM_IRQ_BASE + 0x1E) * 4 47SCC2_VECTOR = (CPM_IRQ_BASE + 0x1D) * 4 48SCC3_VECTOR = (CPM_IRQ_BASE + 0x1C) * 4 49SCC4_VECTOR = (CPM_IRQ_BASE + 0x1B) * 4 50CPM_IRQ_LEVEL = 4 51TIMER_IRQ = 128 52TIMER_IRQ_LEVEL = 4 53PITR_CONST = 0x100 + 16 // 1 Hz timer 54 55MBAR = 0x0003FF00 56 57VALUE_WINDOW = 0x40000000 58ORDER_WINDOW = 0xC0000000 59 60PLX = 0xFFF90000 61 62CSRA = 0xFFFB0000 63CSRB = 0xFFFB0002 64CSRC = 0xFFFB0004 65CSRD = 0xFFFB0006 66STATUS_CABLE_LL = 0x2000 67STATUS_CABLE_DTR = 0x1000 68 69DPRBASE = 0xFFFC0000 70 71SCC1_BASE = DPRBASE + 0xC00 72MISC_BASE = DPRBASE + 0xCB0 73SCC2_BASE = DPRBASE + 0xD00 74SCC3_BASE = DPRBASE + 0xE00 75SCC4_BASE = DPRBASE + 0xF00 76 77// offset from SCCx_BASE 78// SCC_xBASE contain offsets from DPRBASE and must be divisible by 8 79SCC_RBASE = 0 // 16-bit RxBD base address 80SCC_TBASE = 2 // 16-bit TxBD base address 81SCC_RFCR = 4 // 8-bit Rx function code 82SCC_TFCR = 5 // 8-bit Tx function code 83SCC_MRBLR = 6 // 16-bit maximum Rx buffer length 84SCC_C_MASK = 0x34 // 32-bit CRC constant 85SCC_C_PRES = 0x38 // 32-bit CRC preset 86SCC_MFLR = 0x46 // 16-bit max Rx frame length (without flags) 87 88REGBASE = DPRBASE + 0x1000 89PICR = REGBASE + 0x026 // 16-bit periodic irq control 90PITR = REGBASE + 0x02A // 16-bit periodic irq timing 91OR1 = REGBASE + 0x064 // 32-bit RAM bank #1 options 92CICR = REGBASE + 0x540 // 32(24)-bit CP interrupt config 93CIMR = REGBASE + 0x548 // 32-bit CP interrupt mask 94CISR = REGBASE + 0x54C // 32-bit CP interrupts in-service 95PADIR = REGBASE + 0x550 // 16-bit PortA data direction bitmap 96PAPAR = REGBASE + 0x552 // 16-bit PortA pin assignment bitmap 97PAODR = REGBASE + 0x554 // 16-bit PortA open drain bitmap 98PADAT = REGBASE + 0x556 // 16-bit PortA data register 99 100PCDIR = REGBASE + 0x560 // 16-bit PortC data direction bitmap 101PCPAR = REGBASE + 0x562 // 16-bit PortC pin assignment bitmap 102PCSO = REGBASE + 0x564 // 16-bit PortC special options 103PCDAT = REGBASE + 0x566 // 16-bit PortC data register 104PCINT = REGBASE + 0x568 // 16-bit PortC interrupt control 105CR = REGBASE + 0x5C0 // 16-bit Command register 106 107SCC1_REGS = REGBASE + 0x600 108SCC2_REGS = REGBASE + 0x620 109SCC3_REGS = REGBASE + 0x640 110SCC4_REGS = REGBASE + 0x660 111SICR = REGBASE + 0x6EC // 32-bit SI clock route 112 113// offset from SCCx_REGS 114SCC_GSMR_L = 0x00 // 32 bits 115SCC_GSMR_H = 0x04 // 32 bits 116SCC_PSMR = 0x08 // 16 bits 117SCC_TODR = 0x0C // 16 bits 118SCC_DSR = 0x0E // 16 bits 119SCC_SCCE = 0x10 // 16 bits 120SCC_SCCM = 0x14 // 16 bits 121SCC_SCCS = 0x17 // 8 bits 122 123#if QUICC_MEMCPY_USES_PLX 124 .macro memcpy_from_pci src, dest, len // len must be < 8 MB 125 addl #3, \len 126 andl #0xFFFFFFFC, \len // always copy n * 4 bytes 127 movel \src, PLX_DMA_0_PCI 128 movel \dest, PLX_DMA_0_LOCAL 129 movel \len, PLX_DMA_0_LENGTH 130 movel #0x0103, PLX_DMA_CMD_STS // start channel 0 transfer 131 bsr memcpy_from_pci_run 132 .endm 133 134 .macro memcpy_to_pci src, dest, len 135 addl #3, \len 136 andl #0xFFFFFFFC, \len // always copy n * 4 bytes 137 movel \src, PLX_DMA_1_LOCAL 138 movel \dest, PLX_DMA_1_PCI 139 movel \len, PLX_DMA_1_LENGTH 140 movel #0x0301, PLX_DMA_CMD_STS // start channel 1 transfer 141 bsr memcpy_to_pci_run 142 .endm 143 144#else 145 146 .macro memcpy src, dest, len // len must be < 65536 bytes 147 movel %d7, -(%sp) // src and dest must be < 256 MB 148 movel \len, %d7 // bits 0 and 1 149 lsrl #2, \len 150 andl \len, \len 151 beq 99f // only 0 - 3 bytes 152 subl #1, \len // for dbf 15398: movel (\src)+, (\dest)+ 154 dbfw \len, 98b 15599: movel %d7, \len 156 btstl #1, \len 157 beq 99f 158 movew (\src)+, (\dest)+ 15999: btstl #0, \len 160 beq 99f 161 moveb (\src)+, (\dest)+ 16299: 163 movel (%sp)+, %d7 164 .endm 165 166 .macro memcpy_from_pci src, dest, len 167 addl #VALUE_WINDOW, \src 168 memcpy \src, \dest, \len 169 .endm 170 171 .macro memcpy_to_pci src, dest, len 172 addl #VALUE_WINDOW, \dest 173 memcpy \src, \dest, \len 174 .endm 175#endif 176 177 178 .macro wait_for_command 17999: btstl #0, CR 180 bne 99b 181 .endm 182 183 184 185 186/****************************** card initialization *******************/ 187 .text 188 .global _start 189_start: bra init 190 191 .org _start + 4 192ch_status_addr: .long 0, 0, 0, 0 193rx_descs_addr: .long 0 194 195init: 196#if DETECT_RAM 197 movel OR1, %d0 198 andl #0xF00007FF, %d0 // mask AMxx bits 199 orl #0xFFFF800 & ~(MAX_RAM_SIZE - 1), %d0 // update RAM bank size 200 movel %d0, OR1 201#endif 202 203 addl #VALUE_WINDOW, rx_descs_addr // PCI addresses of shared data 204 clrl %d0 // D0 = 4 * port 205init_1: tstl ch_status_addr(%d0) 206 beq init_2 207 addl #VALUE_WINDOW, ch_status_addr(%d0) 208init_2: addl #4, %d0 209 cmpl #4 * 4, %d0 210 bne init_1 211 212 movel #pci9060_interrupt, PCI9060_VECTOR 213 movel #error_interrupt, ERROR_VECTOR 214 movel #port_interrupt_1, SCC1_VECTOR 215 movel #port_interrupt_2, SCC2_VECTOR 216 movel #port_interrupt_3, SCC3_VECTOR 217 movel #port_interrupt_4, SCC4_VECTOR 218 movel #timer_interrupt, TIMER_IRQ * 4 219 220 movel #0x78000000, CIMR // only SCCx IRQs from CPM 221 movew #(TIMER_IRQ_LEVEL << 8) + TIMER_IRQ, PICR // interrupt from PIT 222 movew #PITR_CONST, PITR 223 224 // SCC1=SCCa SCC2=SCCb SCC3=SCCc SCC4=SCCd prio=4 HP=-1 IRQ=64-79 225 movel #0xD41F40 + (CPM_IRQ_LEVEL << 13), CICR 226 movel #0x543, PLX_DMA_0_MODE // 32-bit, Ready, Burst, IRQ 227 movel #0x543, PLX_DMA_1_MODE 228 movel #0x0, PLX_DMA_0_DESC // from PCI to local 229 movel #0x8, PLX_DMA_1_DESC // from local to PCI 230 movel #0x101, PLX_DMA_CMD_STS // enable both DMA channels 231 // enable local IRQ, DMA, doorbells and PCI IRQ 232 orl #0x000F0300, PLX_INTERRUPT_CS 233 234#if DETECT_RAM 235 bsr ram_test 236#else 237 movel #1, PLX_MAILBOX_5 // non-zero value = init complete 238#endif 239 bsr check_csr 240 241 movew #0xFFFF, PAPAR // all pins are clocks/data 242 clrw PADIR // first function 243 clrw PCSO // CD and CTS always active 244 245 246/****************************** main loop *****************************/ 247 248main: movel channel_stats, %d7 // D7 = doorbell + irq status 249 clrl channel_stats 250 251 tstl %d7 252 bne main_1 253 // nothing to do - wait for next event 254 stop #0x2200 // supervisor + IRQ level 2 255 movew #0x2700, %sr // disable IRQs again 256 bra main 257 258main_1: clrl %d0 // D0 = 4 * port 259 clrl %d6 // D6 = doorbell to host value 260 261main_l: btstl #DOORBELL_TO_CARD_CLOSE_0, %d7 262 beq main_op 263 bclrl #DOORBELL_TO_CARD_OPEN_0, %d7 // in case both bits are set 264 bsr close_port 265main_op: 266 btstl #DOORBELL_TO_CARD_OPEN_0, %d7 267 beq main_cl 268 bsr open_port 269main_cl: 270 btstl #DOORBELL_TO_CARD_TX_0, %d7 271 beq main_txend 272 bsr tx 273main_txend: 274 btstl #TASK_SCC_0, %d7 275 beq main_next 276 bsr tx_end 277 bsr rx 278 279main_next: 280 lsrl #1, %d7 // port status for next port 281 addl #4, %d0 // D0 = 4 * next port 282 cmpl #4 * 4, %d0 283 bne main_l 284 movel %d6, PLX_DOORBELL_FROM_CARD // signal the host 285 bra main 286 287 288/****************************** open port *****************************/ 289 290open_port: // D0 = 4 * port, D6 = doorbell to host 291 movel ch_status_addr(%d0), %a0 // A0 = port status address 292 tstl STATUS_OPEN(%a0) 293 bne open_port_ret // port already open 294 movel #1, STATUS_OPEN(%a0) // confirm the port is open 295// setup BDs 296 clrl tx_in(%d0) 297 clrl tx_out(%d0) 298 clrl tx_count(%d0) 299 clrl rx_in(%d0) 300 301 movel SICR, %d1 // D1 = clock settings in SICR 302 andl clocking_mask(%d0), %d1 303 cmpl #CLOCK_TXFROMRX, STATUS_CLOCKING(%a0) 304 bne open_port_clock_ext 305 orl clocking_txfromrx(%d0), %d1 306 bra open_port_set_clock 307 308open_port_clock_ext: 309 orl clocking_ext(%d0), %d1 310open_port_set_clock: 311 movel %d1, SICR // update clock settings in SICR 312 313 orw #STATUS_CABLE_DTR, csr_output(%d0) // DTR on 314 bsr check_csr // call with disabled timer interrupt 315 316// Setup TX descriptors 317 movel first_buffer(%d0), %d1 // D1 = starting buffer address 318 movel tx_first_bd(%d0), %a1 // A1 = starting TX BD address 319 movel #TX_BUFFERS - 2, %d2 // D2 = TX_BUFFERS - 1 counter 320 movel #0x18000000, %d3 // D3 = initial TX BD flags: Int + Last 321 cmpl #PARITY_NONE, STATUS_PARITY(%a0) 322 beq open_port_tx_loop 323 bsetl #26, %d3 // TX BD flag: Transmit CRC 324open_port_tx_loop: 325 movel %d3, (%a1)+ // TX flags + length 326 movel %d1, (%a1)+ // buffer address 327 addl #BUFFER_LENGTH, %d1 328 dbfw %d2, open_port_tx_loop 329 330 bsetl #29, %d3 // TX BD flag: Wrap (last BD) 331 movel %d3, (%a1)+ // Final TX flags + length 332 movel %d1, (%a1)+ // buffer address 333 334// Setup RX descriptors // A1 = starting RX BD address 335 movel #RX_BUFFERS - 2, %d2 // D2 = RX_BUFFERS - 1 counter 336open_port_rx_loop: 337 movel #0x90000000, (%a1)+ // RX flags + length 338 movel %d1, (%a1)+ // buffer address 339 addl #BUFFER_LENGTH, %d1 340 dbfw %d2, open_port_rx_loop 341 342 movel #0xB0000000, (%a1)+ // Final RX flags + length 343 movel %d1, (%a1)+ // buffer address 344 345// Setup port parameters 346 movel scc_base_addr(%d0), %a1 // A1 = SCC_BASE address 347 movel scc_reg_addr(%d0), %a2 // A2 = SCC_REGS address 348 349 movel #0xFFFF, SCC_SCCE(%a2) // clear status bits 350 movel #0x0000, SCC_SCCM(%a2) // interrupt mask 351 352 movel tx_first_bd(%d0), %d1 353 movew %d1, SCC_TBASE(%a1) // D1 = offset of first TxBD 354 addl #TX_BUFFERS * 8, %d1 355 movew %d1, SCC_RBASE(%a1) // D1 = offset of first RxBD 356 moveb #0x8, SCC_RFCR(%a1) // Intel mode, 1000 357 moveb #0x8, SCC_TFCR(%a1) 358 359// Parity settings 360 cmpl #PARITY_CRC16_PR1_CCITT, STATUS_PARITY(%a0) 361 bne open_port_parity_1 362 clrw SCC_PSMR(%a2) // CRC16-CCITT 363 movel #0xF0B8, SCC_C_MASK(%a1) 364 movel #0xFFFF, SCC_C_PRES(%a1) 365 movew #HDLC_MAX_MRU + 2, SCC_MFLR(%a1) // 2 bytes for CRC 366 movew #2, parity_bytes(%d0) 367 bra open_port_2 368 369open_port_parity_1: 370 cmpl #PARITY_CRC32_PR1_CCITT, STATUS_PARITY(%a0) 371 bne open_port_parity_2 372 movew #0x0800, SCC_PSMR(%a2) // CRC32-CCITT 373 movel #0xDEBB20E3, SCC_C_MASK(%a1) 374 movel #0xFFFFFFFF, SCC_C_PRES(%a1) 375 movew #HDLC_MAX_MRU + 4, SCC_MFLR(%a1) // 4 bytes for CRC 376 movew #4, parity_bytes(%d0) 377 bra open_port_2 378 379open_port_parity_2: 380 cmpl #PARITY_CRC16_PR0_CCITT, STATUS_PARITY(%a0) 381 bne open_port_parity_3 382 clrw SCC_PSMR(%a2) // CRC16-CCITT preset 0 383 movel #0xF0B8, SCC_C_MASK(%a1) 384 clrl SCC_C_PRES(%a1) 385 movew #HDLC_MAX_MRU + 2, SCC_MFLR(%a1) // 2 bytes for CRC 386 movew #2, parity_bytes(%d0) 387 bra open_port_2 388 389open_port_parity_3: 390 cmpl #PARITY_CRC32_PR0_CCITT, STATUS_PARITY(%a0) 391 bne open_port_parity_4 392 movew #0x0800, SCC_PSMR(%a2) // CRC32-CCITT preset 0 393 movel #0xDEBB20E3, SCC_C_MASK(%a1) 394 clrl SCC_C_PRES(%a1) 395 movew #HDLC_MAX_MRU + 4, SCC_MFLR(%a1) // 4 bytes for CRC 396 movew #4, parity_bytes(%d0) 397 bra open_port_2 398 399open_port_parity_4: 400 clrw SCC_PSMR(%a2) // no parity 401 movel #0xF0B8, SCC_C_MASK(%a1) 402 movel #0xFFFF, SCC_C_PRES(%a1) 403 movew #HDLC_MAX_MRU, SCC_MFLR(%a1) // 0 bytes for CRC 404 clrw parity_bytes(%d0) 405 406open_port_2: 407 movel #0x00000003, SCC_GSMR_H(%a2) // RTSM 408 cmpl #ENCODING_NRZI, STATUS_ENCODING(%a0) 409 bne open_port_nrz 410 movel #0x10040900, SCC_GSMR_L(%a2) // NRZI: TCI Tend RECN+TENC=1 411 bra open_port_3 412 413open_port_nrz: 414 movel #0x10040000, SCC_GSMR_L(%a2) // NRZ: TCI Tend RECN+TENC=0 415open_port_3: 416 movew #BUFFER_LENGTH, SCC_MRBLR(%a1) 417 movel %d0, %d1 418 lsll #4, %d1 // D1 bits 7 and 6 = port 419 orl #1, %d1 420 movew %d1, CR // Init SCC RX and TX params 421 wait_for_command 422 423 // TCI Tend ENR ENT 424 movew #0x001F, SCC_SCCM(%a2) // TXE RXF BSY TXB RXB interrupts 425 orl #0x00000030, SCC_GSMR_L(%a2) // enable SCC 426open_port_ret: 427 rts 428 429 430/****************************** close port ****************************/ 431 432close_port: // D0 = 4 * port, D6 = doorbell to host 433 movel scc_reg_addr(%d0), %a0 // A0 = SCC_REGS address 434 clrw SCC_SCCM(%a0) // no SCC interrupts 435 andl #0xFFFFFFCF, SCC_GSMR_L(%a0) // Disable ENT and ENR 436 437 andw #~STATUS_CABLE_DTR, csr_output(%d0) // DTR off 438 bsr check_csr // call with disabled timer interrupt 439 440 movel ch_status_addr(%d0), %d1 441 clrl STATUS_OPEN(%d1) // confirm the port is closed 442 rts 443 444 445/****************************** transmit packet ***********************/ 446// queue packets for transmission 447tx: // D0 = 4 * port, D6 = doorbell to host 448 cmpl #TX_BUFFERS, tx_count(%d0) 449 beq tx_ret // all DB's = descs in use 450 451 movel tx_out(%d0), %d1 452 movel %d1, %d2 // D1 = D2 = tx_out BD# = desc# 453 mulul #DESC_LENGTH, %d2 // D2 = TX desc offset 454 addl ch_status_addr(%d0), %d2 455 addl #STATUS_TX_DESCS, %d2 // D2 = TX desc address 456 cmpl #PACKET_FULL, (%d2) // desc status 457 bne tx_ret 458 459// queue it 460 movel 4(%d2), %a0 // PCI address 461 lsll #3, %d1 // BD is 8-bytes long 462 addl tx_first_bd(%d0), %d1 // D1 = current tx_out BD addr 463 464 movel 4(%d1), %a1 // A1 = dest address 465 movel 8(%d2), %d2 // D2 = length 466 movew %d2, 2(%d1) // length into BD 467 memcpy_from_pci %a0, %a1, %d2 468 bsetl #31, (%d1) // CP go ahead 469 470// update tx_out and tx_count 471 movel tx_out(%d0), %d1 472 addl #1, %d1 473 cmpl #TX_BUFFERS, %d1 474 bne tx_1 475 clrl %d1 476tx_1: movel %d1, tx_out(%d0) 477 478 addl #1, tx_count(%d0) 479 bra tx 480 481tx_ret: rts 482 483 484/****************************** packet received ***********************/ 485 486// Service receive buffers // D0 = 4 * port, D6 = doorbell to host 487rx: movel rx_in(%d0), %d1 // D1 = rx_in BD# 488 lsll #3, %d1 // BD is 8-bytes long 489 addl rx_first_bd(%d0), %d1 // D1 = current rx_in BD address 490 movew (%d1), %d2 // D2 = RX BD flags 491 btstl #15, %d2 492 bne rx_ret // BD still empty 493 494 btstl #1, %d2 495 bne rx_overrun 496 497 tstw parity_bytes(%d0) 498 bne rx_parity 499 bclrl #2, %d2 // do not test for CRC errors 500rx_parity: 501 andw #0x0CBC, %d2 // mask status bits 502 cmpw #0x0C00, %d2 // correct frame 503 bne rx_bad_frame 504 clrl %d3 505 movew 2(%d1), %d3 506 subw parity_bytes(%d0), %d3 // D3 = packet length 507 cmpw #HDLC_MAX_MRU, %d3 508 bgt rx_bad_frame 509 510rx_good_frame: 511 movel rx_out, %d2 512 mulul #DESC_LENGTH, %d2 513 addl rx_descs_addr, %d2 // D2 = RX desc address 514 cmpl #PACKET_EMPTY, (%d2) // desc stat 515 bne rx_overrun 516 517 movel %d3, 8(%d2) 518 movel 4(%d1), %a0 // A0 = source address 519 movel 4(%d2), %a1 520 tstl %a1 521 beq rx_ignore_data 522 memcpy_to_pci %a0, %a1, %d3 523rx_ignore_data: 524 movel packet_full(%d0), (%d2) // update desc stat 525 526// update D6 and rx_out 527 bsetl #DOORBELL_FROM_CARD_RX, %d6 // signal host that RX completed 528 movel rx_out, %d2 529 addl #1, %d2 530 cmpl #RX_QUEUE_LENGTH, %d2 531 bne rx_1 532 clrl %d2 533rx_1: movel %d2, rx_out 534 535rx_free_bd: 536 andw #0xF000, (%d1) // clear CM and error bits 537 bsetl #31, (%d1) // free BD 538// update rx_in 539 movel rx_in(%d0), %d1 540 addl #1, %d1 541 cmpl #RX_BUFFERS, %d1 542 bne rx_2 543 clrl %d1 544rx_2: movel %d1, rx_in(%d0) 545 bra rx 546 547rx_overrun: 548 movel ch_status_addr(%d0), %d2 549 addl #1, STATUS_RX_OVERRUNS(%d2) 550 bra rx_free_bd 551 552rx_bad_frame: 553 movel ch_status_addr(%d0), %d2 554 addl #1, STATUS_RX_FRAME_ERRORS(%d2) 555 bra rx_free_bd 556 557rx_ret: rts 558 559 560/****************************** packet transmitted ********************/ 561 562// Service transmit buffers // D0 = 4 * port, D6 = doorbell to host 563tx_end: tstl tx_count(%d0) 564 beq tx_end_ret // TX buffers already empty 565 566 movel tx_in(%d0), %d1 567 movel %d1, %d2 // D1 = D2 = tx_in BD# = desc# 568 lsll #3, %d1 // BD is 8-bytes long 569 addl tx_first_bd(%d0), %d1 // D1 = current tx_in BD address 570 movew (%d1), %d3 // D3 = TX BD flags 571 btstl #15, %d3 572 bne tx_end_ret // BD still being transmitted 573 574// update D6, tx_in and tx_count 575 orl bell_tx(%d0), %d6 // signal host that TX desc freed 576 subl #1, tx_count(%d0) 577 movel tx_in(%d0), %d1 578 addl #1, %d1 579 cmpl #TX_BUFFERS, %d1 580 bne tx_end_1 581 clrl %d1 582tx_end_1: 583 movel %d1, tx_in(%d0) 584 585// free host's descriptor 586 mulul #DESC_LENGTH, %d2 // D2 = TX desc offset 587 addl ch_status_addr(%d0), %d2 588 addl #STATUS_TX_DESCS, %d2 // D2 = TX desc address 589 btstl #1, %d3 590 bne tx_end_underrun 591 movel #PACKET_SENT, (%d2) 592 bra tx_end 593 594tx_end_underrun: 595 movel #PACKET_UNDERRUN, (%d2) 596 bra tx_end 597 598tx_end_ret: rts 599 600 601/****************************** PLX PCI9060 DMA memcpy ****************/ 602 603#if QUICC_MEMCPY_USES_PLX 604// called with interrupts disabled 605memcpy_from_pci_run: 606 movel %d0, -(%sp) 607 movew %sr, -(%sp) 608memcpy_1: 609 movel PLX_DMA_CMD_STS, %d0 // do not btst PLX register directly 610 btstl #4, %d0 // transfer done? 611 bne memcpy_end 612 stop #0x2200 // enable PCI9060 interrupts 613 movew #0x2700, %sr // disable interrupts again 614 bra memcpy_1 615 616memcpy_to_pci_run: 617 movel %d0, -(%sp) 618 movew %sr, -(%sp) 619memcpy_2: 620 movel PLX_DMA_CMD_STS, %d0 // do not btst PLX register directly 621 btstl #12, %d0 // transfer done? 622 bne memcpy_end 623 stop #0x2200 // enable PCI9060 interrupts 624 movew #0x2700, %sr // disable interrupts again 625 bra memcpy_2 626 627memcpy_end: 628 movew (%sp)+, %sr 629 movel (%sp)+, %d0 630 rts 631#endif 632 633 634 635 636 637 638/****************************** PLX PCI9060 interrupt *****************/ 639 640pci9060_interrupt: 641 movel %d0, -(%sp) 642 643 movel PLX_DOORBELL_TO_CARD, %d0 644 movel %d0, PLX_DOORBELL_TO_CARD // confirm all requests 645 orl %d0, channel_stats 646 647 movel #0x0909, PLX_DMA_CMD_STS // clear DMA ch #0 and #1 interrupts 648 649 movel (%sp)+, %d0 650 rte 651 652/****************************** SCC interrupts ************************/ 653 654port_interrupt_1: 655 orl #0, SCC1_REGS + SCC_SCCE; // confirm SCC events 656 orl #1 << TASK_SCC_0, channel_stats 657 movel #0x40000000, CISR 658 rte 659 660port_interrupt_2: 661 orl #0, SCC2_REGS + SCC_SCCE; // confirm SCC events 662 orl #1 << TASK_SCC_1, channel_stats 663 movel #0x20000000, CISR 664 rte 665 666port_interrupt_3: 667 orl #0, SCC3_REGS + SCC_SCCE; // confirm SCC events 668 orl #1 << TASK_SCC_2, channel_stats 669 movel #0x10000000, CISR 670 rte 671 672port_interrupt_4: 673 orl #0, SCC4_REGS + SCC_SCCE; // confirm SCC events 674 orl #1 << TASK_SCC_3, channel_stats 675 movel #0x08000000, CISR 676 rte 677 678error_interrupt: 679 rte 680 681 682/****************************** cable and PM routine ******************/ 683// modified registers: none 684check_csr: 685 movel %d0, -(%sp) 686 movel %d1, -(%sp) 687 movel %d2, -(%sp) 688 movel %a0, -(%sp) 689 movel %a1, -(%sp) 690 691 clrl %d0 // D0 = 4 * port 692 movel #CSRA, %a0 // A0 = CSR address 693 694check_csr_loop: 695 movew (%a0), %d1 // D1 = CSR input bits 696 andl #0xE7, %d1 // PM and cable sense bits (no DCE bit) 697 cmpw #STATUS_CABLE_V35 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1 698 bne check_csr_1 699 movew #0x0E08, %d1 700 bra check_csr_valid 701 702check_csr_1: 703 cmpw #STATUS_CABLE_X21 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1 704 bne check_csr_2 705 movew #0x0408, %d1 706 bra check_csr_valid 707 708check_csr_2: 709 cmpw #STATUS_CABLE_V24 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1 710 bne check_csr_3 711 movew #0x0208, %d1 712 bra check_csr_valid 713 714check_csr_3: 715 cmpw #STATUS_CABLE_EIA530 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1 716 bne check_csr_disable 717 movew #0x0D08, %d1 718 bra check_csr_valid 719 720check_csr_disable: 721 movew #0x0008, %d1 // D1 = disable everything 722 movew #0x80E7, %d2 // D2 = input mask: ignore DSR 723 bra check_csr_write 724 725check_csr_valid: // D1 = mode and IRQ bits 726 movew csr_output(%d0), %d2 727 andw #0x3000, %d2 // D2 = requested LL and DTR bits 728 orw %d2, %d1 // D1 = all requested output bits 729 movew #0x80FF, %d2 // D2 = input mask: include DSR 730 731check_csr_write: 732 cmpw old_csr_output(%d0), %d1 733 beq check_csr_input 734 movew %d1, old_csr_output(%d0) 735 movew %d1, (%a0) // Write CSR output bits 736 737check_csr_input: 738 movew (PCDAT), %d1 739 andw dcd_mask(%d0), %d1 740 beq check_csr_dcd_on // DCD and CTS signals are negated 741 movew (%a0), %d1 // D1 = CSR input bits 742 andw #~STATUS_CABLE_DCD, %d1 // DCD off 743 bra check_csr_previous 744 745check_csr_dcd_on: 746 movew (%a0), %d1 // D1 = CSR input bits 747 orw #STATUS_CABLE_DCD, %d1 // DCD on 748check_csr_previous: 749 andw %d2, %d1 // input mask 750 movel ch_status_addr(%d0), %a1 751 cmpl STATUS_CABLE(%a1), %d1 // check for change 752 beq check_csr_next 753 movel %d1, STATUS_CABLE(%a1) // update status 754 movel bell_cable(%d0), PLX_DOORBELL_FROM_CARD // signal the host 755 756check_csr_next: 757 addl #2, %a0 // next CSR register 758 addl #4, %d0 // D0 = 4 * next port 759 cmpl #4 * 4, %d0 760 bne check_csr_loop 761 762 movel (%sp)+, %a1 763 movel (%sp)+, %a0 764 movel (%sp)+, %d2 765 movel (%sp)+, %d1 766 movel (%sp)+, %d0 767 rts 768 769 770/****************************** timer interrupt ***********************/ 771 772timer_interrupt: 773 bsr check_csr 774 rte 775 776 777/****************************** RAM sizing and test *******************/ 778#if DETECT_RAM 779ram_test: 780 movel #0x12345678, %d1 // D1 = test value 781 movel %d1, (128 * 1024 - 4) 782 movel #128 * 1024, %d0 // D0 = RAM size tested 783ram_test_size: 784 cmpl #MAX_RAM_SIZE, %d0 785 beq ram_test_size_found 786 movel %d0, %a0 787 addl #128 * 1024 - 4, %a0 788 cmpl (%a0), %d1 789 beq ram_test_size_check 790ram_test_next_size: 791 lsll #1, %d0 792 bra ram_test_size 793 794ram_test_size_check: 795 eorl #0xFFFFFFFF, %d1 796 movel %d1, (128 * 1024 - 4) 797 cmpl (%a0), %d1 798 bne ram_test_next_size 799 800ram_test_size_found: // D0 = RAM size 801 movel %d0, %a0 // A0 = fill ptr 802 subl #firmware_end + 4, %d0 803 lsrl #2, %d0 804 movel %d0, %d1 // D1 = DBf counter 805ram_test_fill: 806 movel %a0, -(%a0) 807 dbfw %d1, ram_test_fill 808 subl #0x10000, %d1 809 cmpl #0xFFFFFFFF, %d1 810 bne ram_test_fill 811 812ram_test_loop: // D0 = DBf counter 813 cmpl (%a0)+, %a0 814 dbnew %d0, ram_test_loop 815 bne ram_test_found_bad 816 subl #0x10000, %d0 817 cmpl #0xFFFFFFFF, %d0 818 bne ram_test_loop 819 bra ram_test_all_ok 820 821ram_test_found_bad: 822 subl #4, %a0 823ram_test_all_ok: 824 movel %a0, PLX_MAILBOX_5 825 rts 826#endif 827 828 829/****************************** constants *****************************/ 830 831scc_reg_addr: 832 .long SCC1_REGS, SCC2_REGS, SCC3_REGS, SCC4_REGS 833scc_base_addr: 834 .long SCC1_BASE, SCC2_BASE, SCC3_BASE, SCC4_BASE 835 836tx_first_bd: 837 .long DPRBASE 838 .long DPRBASE + (TX_BUFFERS + RX_BUFFERS) * 8 839 .long DPRBASE + (TX_BUFFERS + RX_BUFFERS) * 8 * 2 840 .long DPRBASE + (TX_BUFFERS + RX_BUFFERS) * 8 * 3 841 842rx_first_bd: 843 .long DPRBASE + TX_BUFFERS * 8 844 .long DPRBASE + TX_BUFFERS * 8 + (TX_BUFFERS + RX_BUFFERS) * 8 845 .long DPRBASE + TX_BUFFERS * 8 + (TX_BUFFERS + RX_BUFFERS) * 8 * 2 846 .long DPRBASE + TX_BUFFERS * 8 + (TX_BUFFERS + RX_BUFFERS) * 8 * 3 847 848first_buffer: 849 .long BUFFERS_ADDR 850 .long BUFFERS_ADDR + (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH 851 .long BUFFERS_ADDR + (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * 2 852 .long BUFFERS_ADDR + (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * 3 853 854bell_tx: 855 .long 1 << DOORBELL_FROM_CARD_TX_0, 1 << DOORBELL_FROM_CARD_TX_1 856 .long 1 << DOORBELL_FROM_CARD_TX_2, 1 << DOORBELL_FROM_CARD_TX_3 857 858bell_cable: 859 .long 1 << DOORBELL_FROM_CARD_CABLE_0, 1 << DOORBELL_FROM_CARD_CABLE_1 860 .long 1 << DOORBELL_FROM_CARD_CABLE_2, 1 << DOORBELL_FROM_CARD_CABLE_3 861 862packet_full: 863 .long PACKET_FULL, PACKET_FULL + 1, PACKET_FULL + 2, PACKET_FULL + 3 864 865clocking_ext: 866 .long 0x0000002C, 0x00003E00, 0x002C0000, 0x3E000000 867clocking_txfromrx: 868 .long 0x0000002D, 0x00003F00, 0x002D0000, 0x3F000000 869clocking_mask: 870 .long 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 871dcd_mask: 872 .word 0x020, 0, 0x080, 0, 0x200, 0, 0x800 873 874 .ascii "wanXL firmware\n" 875 .asciz "Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>\n" 876 877 878/****************************** variables *****************************/ 879 880 .align 4 881channel_stats: .long 0 882 883tx_in: .long 0, 0, 0, 0 // transmitted 884tx_out: .long 0, 0, 0, 0 // received from host for transmission 885tx_count: .long 0, 0, 0, 0 // currently in transmit queue 886 887rx_in: .long 0, 0, 0, 0 // received from port 888rx_out: .long 0 // transmitted to host 889parity_bytes: .word 0, 0, 0, 0, 0, 0, 0 // only 4 words are used 890 891csr_output: .word 0 892old_csr_output: .word 0, 0, 0, 0, 0, 0, 0 893 .align 4 894firmware_end: // must be dword-aligned 895
