.psize 0
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/*
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wanXL serial card driver for Linux
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card firmware part
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Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>
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This program is free software; you can redistribute it and/or modify it
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under the terms of version 2 of the GNU General Public License
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as published by the Free Software Foundation.
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DPRAM BDs:
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0x000 - 0x050 TX#0 0x050 - 0x140 RX#0
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0x140 - 0x190 TX#1 0x190 - 0x280 RX#1
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0x280 - 0x2D0 TX#2 0x2D0 - 0x3C0 RX#2
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0x3C0 - 0x410 TX#3 0x410 - 0x500 RX#3
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000 5FF 1536 Bytes Dual-Port RAM User Data / BDs
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600 6FF 256 Bytes Dual-Port RAM User Data / BDs
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700 7FF 256 Bytes Dual-Port RAM User Data / BDs
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C00 CBF 192 Bytes Dual-Port RAM Parameter RAM Page 1
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D00 DBF 192 Bytes Dual-Port RAM Parameter RAM Page 2
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E00 EBF 192 Bytes Dual-Port RAM Parameter RAM Page 3
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F00 FBF 192 Bytes Dual-Port RAM Parameter RAM Page 4
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local interrupts level
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NMI 7
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PIT timer, CPM (RX/TX complete) 4
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PCI9060 DMA and PCI doorbells 3
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Cable - not used 1
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*/
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#include <linux/hdlc.h>
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#include <linux/hdlc/ioctl.h>
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#include "wanxl.h"
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/* memory addresses and offsets */
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MAX_RAM_SIZE = 16 * 1024 * 1024 // max RAM supported by hardware
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PCI9060_VECTOR = 0x0000006C
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CPM_IRQ_BASE = 0x40
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ERROR_VECTOR = CPM_IRQ_BASE * 4
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SCC1_VECTOR = (CPM_IRQ_BASE + 0x1E) * 4
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SCC2_VECTOR = (CPM_IRQ_BASE + 0x1D) * 4
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SCC3_VECTOR = (CPM_IRQ_BASE + 0x1C) * 4
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SCC4_VECTOR = (CPM_IRQ_BASE + 0x1B) * 4
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CPM_IRQ_LEVEL = 4
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TIMER_IRQ = 128
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TIMER_IRQ_LEVEL = 4
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PITR_CONST = 0x100 + 16 // 1 Hz timer
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MBAR = 0x0003FF00
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VALUE_WINDOW = 0x40000000
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ORDER_WINDOW = 0xC0000000
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PLX = 0xFFF90000
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CSRA = 0xFFFB0000
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CSRB = 0xFFFB0002
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CSRC = 0xFFFB0004
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CSRD = 0xFFFB0006
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STATUS_CABLE_LL = 0x2000
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STATUS_CABLE_DTR = 0x1000
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DPRBASE = 0xFFFC0000
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SCC1_BASE = DPRBASE + 0xC00
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MISC_BASE = DPRBASE + 0xCB0
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SCC2_BASE = DPRBASE + 0xD00
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SCC3_BASE = DPRBASE + 0xE00
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SCC4_BASE = DPRBASE + 0xF00
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// offset from SCCx_BASE
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// SCC_xBASE contain offsets from DPRBASE and must be divisible by 8
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SCC_RBASE = 0 // 16-bit RxBD base address
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SCC_TBASE = 2 // 16-bit TxBD base address
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SCC_RFCR = 4 // 8-bit Rx function code
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SCC_TFCR = 5 // 8-bit Tx function code
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SCC_MRBLR = 6 // 16-bit maximum Rx buffer length
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SCC_C_MASK = 0x34 // 32-bit CRC constant
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SCC_C_PRES = 0x38 // 32-bit CRC preset
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SCC_MFLR = 0x46 // 16-bit max Rx frame length (without flags)
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REGBASE = DPRBASE + 0x1000
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PICR = REGBASE + 0x026 // 16-bit periodic irq control
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PITR = REGBASE + 0x02A // 16-bit periodic irq timing
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OR1 = REGBASE + 0x064 // 32-bit RAM bank #1 options
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CICR = REGBASE + 0x540 // 32(24)-bit CP interrupt config
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CIMR = REGBASE + 0x548 // 32-bit CP interrupt mask
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CISR = REGBASE + 0x54C // 32-bit CP interrupts in-service
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PADIR = REGBASE + 0x550 // 16-bit PortA data direction bitmap
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PAPAR = REGBASE + 0x552 // 16-bit PortA pin assignment bitmap
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PAODR = REGBASE + 0x554 // 16-bit PortA open drain bitmap
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PADAT = REGBASE + 0x556 // 16-bit PortA data register
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PCDIR = REGBASE + 0x560 // 16-bit PortC data direction bitmap
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PCPAR = REGBASE + 0x562 // 16-bit PortC pin assignment bitmap
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PCSO = REGBASE + 0x564 // 16-bit PortC special options
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PCDAT = REGBASE + 0x566 // 16-bit PortC data register
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PCINT = REGBASE + 0x568 // 16-bit PortC interrupt control
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CR = REGBASE + 0x5C0 // 16-bit Command register
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SCC1_REGS = REGBASE + 0x600
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SCC2_REGS = REGBASE + 0x620
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SCC3_REGS = REGBASE + 0x640
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SCC4_REGS = REGBASE + 0x660
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SICR = REGBASE + 0x6EC // 32-bit SI clock route
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// offset from SCCx_REGS
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SCC_GSMR_L = 0x00 // 32 bits
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SCC_GSMR_H = 0x04 // 32 bits
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SCC_PSMR = 0x08 // 16 bits
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SCC_TODR = 0x0C // 16 bits
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SCC_DSR = 0x0E // 16 bits
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SCC_SCCE = 0x10 // 16 bits
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SCC_SCCM = 0x14 // 16 bits
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SCC_SCCS = 0x17 // 8 bits
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#if QUICC_MEMCPY_USES_PLX
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.macro memcpy_from_pci src, dest, len // len must be < 8 MB
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addl #3, \len
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andl #0xFFFFFFFC, \len // always copy n * 4 bytes
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movel \src, PLX_DMA_0_PCI
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movel \dest, PLX_DMA_0_LOCAL
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movel \len, PLX_DMA_0_LENGTH
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movel #0x0103, PLX_DMA_CMD_STS // start channel 0 transfer
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bsr memcpy_from_pci_run
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.endm
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.macro memcpy_to_pci src, dest, len
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addl #3, \len
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andl #0xFFFFFFFC, \len // always copy n * 4 bytes
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movel \src, PLX_DMA_1_LOCAL
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movel \dest, PLX_DMA_1_PCI
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movel \len, PLX_DMA_1_LENGTH
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movel #0x0301, PLX_DMA_CMD_STS // start channel 1 transfer
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bsr memcpy_to_pci_run
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.endm
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#else
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.macro memcpy src, dest, len // len must be < 65536 bytes
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movel %d7, -(%sp) // src and dest must be < 256 MB
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movel \len, %d7 // bits 0 and 1
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lsrl #2, \len
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andl \len, \len
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beq 99f // only 0 - 3 bytes
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subl #1, \len // for dbf
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98: movel (\src)+, (\dest)+
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dbfw \len, 98b
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99: movel %d7, \len
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btstl #1, \len
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beq 99f
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movew (\src)+, (\dest)+
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99: btstl #0, \len
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beq 99f
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moveb (\src)+, (\dest)+
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99:
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movel (%sp)+, %d7
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.endm
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.macro memcpy_from_pci src, dest, len
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addl #VALUE_WINDOW, \src
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memcpy \src, \dest, \len
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.endm
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.macro memcpy_to_pci src, dest, len
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addl #VALUE_WINDOW, \dest
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memcpy \src, \dest, \len
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.endm
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#endif
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.macro wait_for_command
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99: btstl #0, CR
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bne 99b
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.endm
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/****************************** card initialization *******************/
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.text
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.global _start
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_start: bra init
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.org _start + 4
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ch_status_addr: .long 0, 0, 0, 0
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rx_descs_addr: .long 0
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init:
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#if DETECT_RAM
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movel OR1, %d0
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andl #0xF00007FF, %d0 // mask AMxx bits
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orl #0xFFFF800 & ~(MAX_RAM_SIZE - 1), %d0 // update RAM bank size
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movel %d0, OR1
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#endif
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addl #VALUE_WINDOW, rx_descs_addr // PCI addresses of shared data
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clrl %d0 // D0 = 4 * port
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init_1: tstl ch_status_addr(%d0)
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beq init_2
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addl #VALUE_WINDOW, ch_status_addr(%d0)
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init_2: addl #4, %d0
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cmpl #4 * 4, %d0
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bne init_1
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movel #pci9060_interrupt, PCI9060_VECTOR
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movel #error_interrupt, ERROR_VECTOR
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movel #port_interrupt_1, SCC1_VECTOR
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movel #port_interrupt_2, SCC2_VECTOR
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movel #port_interrupt_3, SCC3_VECTOR
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movel #port_interrupt_4, SCC4_VECTOR
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movel #timer_interrupt, TIMER_IRQ * 4
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movel #0x78000000, CIMR // only SCCx IRQs from CPM
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movew #(TIMER_IRQ_LEVEL << 8) + TIMER_IRQ, PICR // interrupt from PIT
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movew #PITR_CONST, PITR
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// SCC1=SCCa SCC2=SCCb SCC3=SCCc SCC4=SCCd prio=4 HP=-1 IRQ=64-79
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movel #0xD41F40 + (CPM_IRQ_LEVEL << 13), CICR
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movel #0x543, PLX_DMA_0_MODE // 32-bit, Ready, Burst, IRQ
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movel #0x543, PLX_DMA_1_MODE
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movel #0x0, PLX_DMA_0_DESC // from PCI to local
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movel #0x8, PLX_DMA_1_DESC // from local to PCI
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movel #0x101, PLX_DMA_CMD_STS // enable both DMA channels
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// enable local IRQ, DMA, doorbells and PCI IRQ
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orl #0x000F0300, PLX_INTERRUPT_CS
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#if DETECT_RAM
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bsr ram_test
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#else
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movel #1, PLX_MAILBOX_5 // non-zero value = init complete
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#endif
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bsr check_csr
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movew #0xFFFF, PAPAR // all pins are clocks/data
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clrw PADIR // first function
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clrw PCSO // CD and CTS always active
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/****************************** main loop *****************************/
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main: movel channel_stats, %d7 // D7 = doorbell + irq status
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clrl channel_stats
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tstl %d7
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bne main_1
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// nothing to do - wait for next event
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stop #0x2200 // supervisor + IRQ level 2
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movew #0x2700, %sr // disable IRQs again
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bra main
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main_1: clrl %d0 // D0 = 4 * port
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clrl %d6 // D6 = doorbell to host value
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main_l: btstl #DOORBELL_TO_CARD_CLOSE_0, %d7
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beq main_op
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bclrl #DOORBELL_TO_CARD_OPEN_0, %d7 // in case both bits are set
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bsr close_port
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main_op:
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btstl #DOORBELL_TO_CARD_OPEN_0, %d7
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beq main_cl
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bsr open_port
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main_cl:
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btstl #DOORBELL_TO_CARD_TX_0, %d7
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beq main_txend
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bsr tx
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main_txend:
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btstl #TASK_SCC_0, %d7
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beq main_next
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bsr tx_end
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bsr rx
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main_next:
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lsrl #1, %d7 // port status for next port
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addl #4, %d0 // D0 = 4 * next port
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cmpl #4 * 4, %d0
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bne main_l
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movel %d6, PLX_DOORBELL_FROM_CARD // signal the host
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bra main
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/****************************** open port *****************************/
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open_port: // D0 = 4 * port, D6 = doorbell to host
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movel ch_status_addr(%d0), %a0 // A0 = port status address
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tstl STATUS_OPEN(%a0)
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bne open_port_ret // port already open
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movel #1, STATUS_OPEN(%a0) // confirm the port is open
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// setup BDs
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clrl tx_in(%d0)
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clrl tx_out(%d0)
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clrl tx_count(%d0)
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clrl rx_in(%d0)
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movel SICR, %d1 // D1 = clock settings in SICR
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andl clocking_mask(%d0), %d1
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cmpl #CLOCK_TXFROMRX, STATUS_CLOCKING(%a0)
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bne open_port_clock_ext
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orl clocking_txfromrx(%d0), %d1
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bra open_port_set_clock
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open_port_clock_ext:
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orl clocking_ext(%d0), %d1
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open_port_set_clock:
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movel %d1, SICR // update clock settings in SICR
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orw #STATUS_CABLE_DTR, csr_output(%d0) // DTR on
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bsr check_csr // call with disabled timer interrupt
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// Setup TX descriptors
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movel first_buffer(%d0), %d1 // D1 = starting buffer address
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movel tx_first_bd(%d0), %a1 // A1 = starting TX BD address
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movel #TX_BUFFERS - 2, %d2 // D2 = TX_BUFFERS - 1 counter
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movel #0x18000000, %d3 // D3 = initial TX BD flags: Int + Last
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cmpl #PARITY_NONE, STATUS_PARITY(%a0)
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beq open_port_tx_loop
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bsetl #26, %d3 // TX BD flag: Transmit CRC
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open_port_tx_loop:
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movel %d3, (%a1)+ // TX flags + length
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movel %d1, (%a1)+ // buffer address
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addl #BUFFER_LENGTH, %d1
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dbfw %d2, open_port_tx_loop
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bsetl #29, %d3 // TX BD flag: Wrap (last BD)
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movel %d3, (%a1)+ // Final TX flags + length
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movel %d1, (%a1)+ // buffer address
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// Setup RX descriptors // A1 = starting RX BD address
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movel #RX_BUFFERS - 2, %d2 // D2 = RX_BUFFERS - 1 counter
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open_port_rx_loop:
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movel #0x90000000, (%a1)+ // RX flags + length
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movel %d1, (%a1)+ // buffer address
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addl #BUFFER_LENGTH, %d1
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dbfw %d2, open_port_rx_loop
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movel #0xB0000000, (%a1)+ // Final RX flags + length
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movel %d1, (%a1)+ // buffer address
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// Setup port parameters
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movel scc_base_addr(%d0), %a1 // A1 = SCC_BASE address
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movel scc_reg_addr(%d0), %a2 // A2 = SCC_REGS address
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movel #0xFFFF, SCC_SCCE(%a2) // clear status bits
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movel #0x0000, SCC_SCCM(%a2) // interrupt mask
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movel tx_first_bd(%d0), %d1
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movew %d1, SCC_TBASE(%a1) // D1 = offset of first TxBD
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addl #TX_BUFFERS * 8, %d1
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movew %d1, SCC_RBASE(%a1) // D1 = offset of first RxBD
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moveb #0x8, SCC_RFCR(%a1) // Intel mode, 1000
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moveb #0x8, SCC_TFCR(%a1)
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// Parity settings
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cmpl #PARITY_CRC16_PR1_CCITT, STATUS_PARITY(%a0)
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bne open_port_parity_1
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clrw SCC_PSMR(%a2) // CRC16-CCITT
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movel #0xF0B8, SCC_C_MASK(%a1)
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movel #0xFFFF, SCC_C_PRES(%a1)
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movew #HDLC_MAX_MRU + 2, SCC_MFLR(%a1) // 2 bytes for CRC
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movew #2, parity_bytes(%d0)
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bra open_port_2
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open_port_parity_1:
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cmpl #PARITY_CRC32_PR1_CCITT, STATUS_PARITY(%a0)
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bne open_port_parity_2
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movew #0x0800, SCC_PSMR(%a2) // CRC32-CCITT
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movel #0xDEBB20E3, SCC_C_MASK(%a1)
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movel #0xFFFFFFFF, SCC_C_PRES(%a1)
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movew #HDLC_MAX_MRU + 4, SCC_MFLR(%a1) // 4 bytes for CRC
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movew #4, parity_bytes(%d0)
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bra open_port_2
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open_port_parity_2:
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cmpl #PARITY_CRC16_PR0_CCITT, STATUS_PARITY(%a0)
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bne open_port_parity_3
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clrw SCC_PSMR(%a2) // CRC16-CCITT preset 0
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movel #0xF0B8, SCC_C_MASK(%a1)
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clrl SCC_C_PRES(%a1)
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movew #HDLC_MAX_MRU + 2, SCC_MFLR(%a1) // 2 bytes for CRC
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movew #2, parity_bytes(%d0)
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bra open_port_2
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open_port_parity_3:
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cmpl #PARITY_CRC32_PR0_CCITT, STATUS_PARITY(%a0)
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bne open_port_parity_4
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movew #0x0800, SCC_PSMR(%a2) // CRC32-CCITT preset 0
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movel #0xDEBB20E3, SCC_C_MASK(%a1)
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clrl SCC_C_PRES(%a1)
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movew #HDLC_MAX_MRU + 4, SCC_MFLR(%a1) // 4 bytes for CRC
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movew #4, parity_bytes(%d0)
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bra open_port_2
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open_port_parity_4:
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clrw SCC_PSMR(%a2) // no parity
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movel #0xF0B8, SCC_C_MASK(%a1)
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movel #0xFFFF, SCC_C_PRES(%a1)
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movew #HDLC_MAX_MRU, SCC_MFLR(%a1) // 0 bytes for CRC
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clrw parity_bytes(%d0)
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open_port_2:
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movel #0x00000003, SCC_GSMR_H(%a2) // RTSM
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cmpl #ENCODING_NRZI, STATUS_ENCODING(%a0)
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bne open_port_nrz
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movel #0x10040900, SCC_GSMR_L(%a2) // NRZI: TCI Tend RECN+TENC=1
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bra open_port_3
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open_port_nrz:
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movel #0x10040000, SCC_GSMR_L(%a2) // NRZ: TCI Tend RECN+TENC=0
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open_port_3:
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movew #BUFFER_LENGTH, SCC_MRBLR(%a1)
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movel %d0, %d1
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lsll #4, %d1 // D1 bits 7 and 6 = port
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orl #1, %d1
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movew %d1, CR // Init SCC RX and TX params
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wait_for_command
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// TCI Tend ENR ENT
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movew #0x001F, SCC_SCCM(%a2) // TXE RXF BSY TXB RXB interrupts
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orl #0x00000030, SCC_GSMR_L(%a2) // enable SCC
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open_port_ret:
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rts
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/****************************** close port ****************************/
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close_port: // D0 = 4 * port, D6 = doorbell to host
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movel scc_reg_addr(%d0), %a0 // A0 = SCC_REGS address
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clrw SCC_SCCM(%a0) // no SCC interrupts
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andl #0xFFFFFFCF, SCC_GSMR_L(%a0) // Disable ENT and ENR
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andw #~STATUS_CABLE_DTR, csr_output(%d0) // DTR off
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bsr check_csr // call with disabled timer interrupt
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movel ch_status_addr(%d0), %d1
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clrl STATUS_OPEN(%d1) // confirm the port is closed
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rts
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/****************************** transmit packet ***********************/
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// queue packets for transmission
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tx: // D0 = 4 * port, D6 = doorbell to host
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cmpl #TX_BUFFERS, tx_count(%d0)
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beq tx_ret // all DB's = descs in use
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movel tx_out(%d0), %d1
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movel %d1, %d2 // D1 = D2 = tx_out BD# = desc#
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mulul #DESC_LENGTH, %d2 // D2 = TX desc offset
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addl ch_status_addr(%d0), %d2
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addl #STATUS_TX_DESCS, %d2 // D2 = TX desc address
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cmpl #PACKET_FULL, (%d2) // desc status
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bne tx_ret
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// queue it
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movel 4(%d2), %a0 // PCI address
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lsll #3, %d1 // BD is 8-bytes long
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addl tx_first_bd(%d0), %d1 // D1 = current tx_out BD addr
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movel 4(%d1), %a1 // A1 = dest address
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movel 8(%d2), %d2 // D2 = length
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movew %d2, 2(%d1) // length into BD
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memcpy_from_pci %a0, %a1, %d2
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bsetl #31, (%d1) // CP go ahead
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// update tx_out and tx_count
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movel tx_out(%d0), %d1
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addl #1, %d1
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cmpl #TX_BUFFERS, %d1
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bne tx_1
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clrl %d1
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tx_1: movel %d1, tx_out(%d0)
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addl #1, tx_count(%d0)
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bra tx
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tx_ret: rts
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/****************************** packet received ***********************/
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// Service receive buffers // D0 = 4 * port, D6 = doorbell to host
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rx: movel rx_in(%d0), %d1 // D1 = rx_in BD#
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lsll #3, %d1 // BD is 8-bytes long
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addl rx_first_bd(%d0), %d1 // D1 = current rx_in BD address
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movew (%d1), %d2 // D2 = RX BD flags
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btstl #15, %d2
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bne rx_ret // BD still empty
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btstl #1, %d2
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bne rx_overrun
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tstw parity_bytes(%d0)
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bne rx_parity
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bclrl #2, %d2 // do not test for CRC errors
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rx_parity:
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andw #0x0CBC, %d2 // mask status bits
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cmpw #0x0C00, %d2 // correct frame
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bne rx_bad_frame
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clrl %d3
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movew 2(%d1), %d3
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subw parity_bytes(%d0), %d3 // D3 = packet length
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cmpw #HDLC_MAX_MRU, %d3
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bgt rx_bad_frame
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rx_good_frame:
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movel rx_out, %d2
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mulul #DESC_LENGTH, %d2
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addl rx_descs_addr, %d2 // D2 = RX desc address
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cmpl #PACKET_EMPTY, (%d2) // desc stat
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bne rx_overrun
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movel %d3, 8(%d2)
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movel 4(%d1), %a0 // A0 = source address
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movel 4(%d2), %a1
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tstl %a1
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beq rx_ignore_data
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memcpy_to_pci %a0, %a1, %d3
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rx_ignore_data:
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movel packet_full(%d0), (%d2) // update desc stat
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// update D6 and rx_out
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bsetl #DOORBELL_FROM_CARD_RX, %d6 // signal host that RX completed
|
movel rx_out, %d2
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addl #1, %d2
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cmpl #RX_QUEUE_LENGTH, %d2
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bne rx_1
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clrl %d2
|
rx_1: movel %d2, rx_out
|
|
rx_free_bd:
|
andw #0xF000, (%d1) // clear CM and error bits
|
bsetl #31, (%d1) // free BD
|
// update rx_in
|
movel rx_in(%d0), %d1
|
addl #1, %d1
|
cmpl #RX_BUFFERS, %d1
|
bne rx_2
|
clrl %d1
|
rx_2: movel %d1, rx_in(%d0)
|
bra rx
|
|
rx_overrun:
|
movel ch_status_addr(%d0), %d2
|
addl #1, STATUS_RX_OVERRUNS(%d2)
|
bra rx_free_bd
|
|
rx_bad_frame:
|
movel ch_status_addr(%d0), %d2
|
addl #1, STATUS_RX_FRAME_ERRORS(%d2)
|
bra rx_free_bd
|
|
rx_ret: rts
|
|
|
/****************************** packet transmitted ********************/
|
|
// Service transmit buffers // D0 = 4 * port, D6 = doorbell to host
|
tx_end: tstl tx_count(%d0)
|
beq tx_end_ret // TX buffers already empty
|
|
movel tx_in(%d0), %d1
|
movel %d1, %d2 // D1 = D2 = tx_in BD# = desc#
|
lsll #3, %d1 // BD is 8-bytes long
|
addl tx_first_bd(%d0), %d1 // D1 = current tx_in BD address
|
movew (%d1), %d3 // D3 = TX BD flags
|
btstl #15, %d3
|
bne tx_end_ret // BD still being transmitted
|
|
// update D6, tx_in and tx_count
|
orl bell_tx(%d0), %d6 // signal host that TX desc freed
|
subl #1, tx_count(%d0)
|
movel tx_in(%d0), %d1
|
addl #1, %d1
|
cmpl #TX_BUFFERS, %d1
|
bne tx_end_1
|
clrl %d1
|
tx_end_1:
|
movel %d1, tx_in(%d0)
|
|
// free host's descriptor
|
mulul #DESC_LENGTH, %d2 // D2 = TX desc offset
|
addl ch_status_addr(%d0), %d2
|
addl #STATUS_TX_DESCS, %d2 // D2 = TX desc address
|
btstl #1, %d3
|
bne tx_end_underrun
|
movel #PACKET_SENT, (%d2)
|
bra tx_end
|
|
tx_end_underrun:
|
movel #PACKET_UNDERRUN, (%d2)
|
bra tx_end
|
|
tx_end_ret: rts
|
|
|
/****************************** PLX PCI9060 DMA memcpy ****************/
|
|
#if QUICC_MEMCPY_USES_PLX
|
// called with interrupts disabled
|
memcpy_from_pci_run:
|
movel %d0, -(%sp)
|
movew %sr, -(%sp)
|
memcpy_1:
|
movel PLX_DMA_CMD_STS, %d0 // do not btst PLX register directly
|
btstl #4, %d0 // transfer done?
|
bne memcpy_end
|
stop #0x2200 // enable PCI9060 interrupts
|
movew #0x2700, %sr // disable interrupts again
|
bra memcpy_1
|
|
memcpy_to_pci_run:
|
movel %d0, -(%sp)
|
movew %sr, -(%sp)
|
memcpy_2:
|
movel PLX_DMA_CMD_STS, %d0 // do not btst PLX register directly
|
btstl #12, %d0 // transfer done?
|
bne memcpy_end
|
stop #0x2200 // enable PCI9060 interrupts
|
movew #0x2700, %sr // disable interrupts again
|
bra memcpy_2
|
|
memcpy_end:
|
movew (%sp)+, %sr
|
movel (%sp)+, %d0
|
rts
|
#endif
|
|
|
|
|
|
|
/****************************** PLX PCI9060 interrupt *****************/
|
|
pci9060_interrupt:
|
movel %d0, -(%sp)
|
|
movel PLX_DOORBELL_TO_CARD, %d0
|
movel %d0, PLX_DOORBELL_TO_CARD // confirm all requests
|
orl %d0, channel_stats
|
|
movel #0x0909, PLX_DMA_CMD_STS // clear DMA ch #0 and #1 interrupts
|
|
movel (%sp)+, %d0
|
rte
|
|
/****************************** SCC interrupts ************************/
|
|
port_interrupt_1:
|
orl #0, SCC1_REGS + SCC_SCCE; // confirm SCC events
|
orl #1 << TASK_SCC_0, channel_stats
|
movel #0x40000000, CISR
|
rte
|
|
port_interrupt_2:
|
orl #0, SCC2_REGS + SCC_SCCE; // confirm SCC events
|
orl #1 << TASK_SCC_1, channel_stats
|
movel #0x20000000, CISR
|
rte
|
|
port_interrupt_3:
|
orl #0, SCC3_REGS + SCC_SCCE; // confirm SCC events
|
orl #1 << TASK_SCC_2, channel_stats
|
movel #0x10000000, CISR
|
rte
|
|
port_interrupt_4:
|
orl #0, SCC4_REGS + SCC_SCCE; // confirm SCC events
|
orl #1 << TASK_SCC_3, channel_stats
|
movel #0x08000000, CISR
|
rte
|
|
error_interrupt:
|
rte
|
|
|
/****************************** cable and PM routine ******************/
|
// modified registers: none
|
check_csr:
|
movel %d0, -(%sp)
|
movel %d1, -(%sp)
|
movel %d2, -(%sp)
|
movel %a0, -(%sp)
|
movel %a1, -(%sp)
|
|
clrl %d0 // D0 = 4 * port
|
movel #CSRA, %a0 // A0 = CSR address
|
|
check_csr_loop:
|
movew (%a0), %d1 // D1 = CSR input bits
|
andl #0xE7, %d1 // PM and cable sense bits (no DCE bit)
|
cmpw #STATUS_CABLE_V35 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1
|
bne check_csr_1
|
movew #0x0E08, %d1
|
bra check_csr_valid
|
|
check_csr_1:
|
cmpw #STATUS_CABLE_X21 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1
|
bne check_csr_2
|
movew #0x0408, %d1
|
bra check_csr_valid
|
|
check_csr_2:
|
cmpw #STATUS_CABLE_V24 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1
|
bne check_csr_3
|
movew #0x0208, %d1
|
bra check_csr_valid
|
|
check_csr_3:
|
cmpw #STATUS_CABLE_EIA530 * (1 + 1 << STATUS_CABLE_PM_SHIFT), %d1
|
bne check_csr_disable
|
movew #0x0D08, %d1
|
bra check_csr_valid
|
|
check_csr_disable:
|
movew #0x0008, %d1 // D1 = disable everything
|
movew #0x80E7, %d2 // D2 = input mask: ignore DSR
|
bra check_csr_write
|
|
check_csr_valid: // D1 = mode and IRQ bits
|
movew csr_output(%d0), %d2
|
andw #0x3000, %d2 // D2 = requested LL and DTR bits
|
orw %d2, %d1 // D1 = all requested output bits
|
movew #0x80FF, %d2 // D2 = input mask: include DSR
|
|
check_csr_write:
|
cmpw old_csr_output(%d0), %d1
|
beq check_csr_input
|
movew %d1, old_csr_output(%d0)
|
movew %d1, (%a0) // Write CSR output bits
|
|
check_csr_input:
|
movew (PCDAT), %d1
|
andw dcd_mask(%d0), %d1
|
beq check_csr_dcd_on // DCD and CTS signals are negated
|
movew (%a0), %d1 // D1 = CSR input bits
|
andw #~STATUS_CABLE_DCD, %d1 // DCD off
|
bra check_csr_previous
|
|
check_csr_dcd_on:
|
movew (%a0), %d1 // D1 = CSR input bits
|
orw #STATUS_CABLE_DCD, %d1 // DCD on
|
check_csr_previous:
|
andw %d2, %d1 // input mask
|
movel ch_status_addr(%d0), %a1
|
cmpl STATUS_CABLE(%a1), %d1 // check for change
|
beq check_csr_next
|
movel %d1, STATUS_CABLE(%a1) // update status
|
movel bell_cable(%d0), PLX_DOORBELL_FROM_CARD // signal the host
|
|
check_csr_next:
|
addl #2, %a0 // next CSR register
|
addl #4, %d0 // D0 = 4 * next port
|
cmpl #4 * 4, %d0
|
bne check_csr_loop
|
|
movel (%sp)+, %a1
|
movel (%sp)+, %a0
|
movel (%sp)+, %d2
|
movel (%sp)+, %d1
|
movel (%sp)+, %d0
|
rts
|
|
|
/****************************** timer interrupt ***********************/
|
|
timer_interrupt:
|
bsr check_csr
|
rte
|
|
|
/****************************** RAM sizing and test *******************/
|
#if DETECT_RAM
|
ram_test:
|
movel #0x12345678, %d1 // D1 = test value
|
movel %d1, (128 * 1024 - 4)
|
movel #128 * 1024, %d0 // D0 = RAM size tested
|
ram_test_size:
|
cmpl #MAX_RAM_SIZE, %d0
|
beq ram_test_size_found
|
movel %d0, %a0
|
addl #128 * 1024 - 4, %a0
|
cmpl (%a0), %d1
|
beq ram_test_size_check
|
ram_test_next_size:
|
lsll #1, %d0
|
bra ram_test_size
|
|
ram_test_size_check:
|
eorl #0xFFFFFFFF, %d1
|
movel %d1, (128 * 1024 - 4)
|
cmpl (%a0), %d1
|
bne ram_test_next_size
|
|
ram_test_size_found: // D0 = RAM size
|
movel %d0, %a0 // A0 = fill ptr
|
subl #firmware_end + 4, %d0
|
lsrl #2, %d0
|
movel %d0, %d1 // D1 = DBf counter
|
ram_test_fill:
|
movel %a0, -(%a0)
|
dbfw %d1, ram_test_fill
|
subl #0x10000, %d1
|
cmpl #0xFFFFFFFF, %d1
|
bne ram_test_fill
|
|
ram_test_loop: // D0 = DBf counter
|
cmpl (%a0)+, %a0
|
dbnew %d0, ram_test_loop
|
bne ram_test_found_bad
|
subl #0x10000, %d0
|
cmpl #0xFFFFFFFF, %d0
|
bne ram_test_loop
|
bra ram_test_all_ok
|
|
ram_test_found_bad:
|
subl #4, %a0
|
ram_test_all_ok:
|
movel %a0, PLX_MAILBOX_5
|
rts
|
#endif
|
|
|
/****************************** constants *****************************/
|
|
scc_reg_addr:
|
.long SCC1_REGS, SCC2_REGS, SCC3_REGS, SCC4_REGS
|
scc_base_addr:
|
.long SCC1_BASE, SCC2_BASE, SCC3_BASE, SCC4_BASE
|
|
tx_first_bd:
|
.long DPRBASE
|
.long DPRBASE + (TX_BUFFERS + RX_BUFFERS) * 8
|
.long DPRBASE + (TX_BUFFERS + RX_BUFFERS) * 8 * 2
|
.long DPRBASE + (TX_BUFFERS + RX_BUFFERS) * 8 * 3
|
|
rx_first_bd:
|
.long DPRBASE + TX_BUFFERS * 8
|
.long DPRBASE + TX_BUFFERS * 8 + (TX_BUFFERS + RX_BUFFERS) * 8
|
.long DPRBASE + TX_BUFFERS * 8 + (TX_BUFFERS + RX_BUFFERS) * 8 * 2
|
.long DPRBASE + TX_BUFFERS * 8 + (TX_BUFFERS + RX_BUFFERS) * 8 * 3
|
|
first_buffer:
|
.long BUFFERS_ADDR
|
.long BUFFERS_ADDR + (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH
|
.long BUFFERS_ADDR + (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * 2
|
.long BUFFERS_ADDR + (TX_BUFFERS + RX_BUFFERS) * BUFFER_LENGTH * 3
|
|
bell_tx:
|
.long 1 << DOORBELL_FROM_CARD_TX_0, 1 << DOORBELL_FROM_CARD_TX_1
|
.long 1 << DOORBELL_FROM_CARD_TX_2, 1 << DOORBELL_FROM_CARD_TX_3
|
|
bell_cable:
|
.long 1 << DOORBELL_FROM_CARD_CABLE_0, 1 << DOORBELL_FROM_CARD_CABLE_1
|
.long 1 << DOORBELL_FROM_CARD_CABLE_2, 1 << DOORBELL_FROM_CARD_CABLE_3
|
|
packet_full:
|
.long PACKET_FULL, PACKET_FULL + 1, PACKET_FULL + 2, PACKET_FULL + 3
|
|
clocking_ext:
|
.long 0x0000002C, 0x00003E00, 0x002C0000, 0x3E000000
|
clocking_txfromrx:
|
.long 0x0000002D, 0x00003F00, 0x002D0000, 0x3F000000
|
clocking_mask:
|
.long 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000
|
dcd_mask:
|
.word 0x020, 0, 0x080, 0, 0x200, 0, 0x800
|
|
.ascii "wanXL firmware\n"
|
.asciz "Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl>\n"
|
|
|
/****************************** variables *****************************/
|
|
.align 4
|
channel_stats: .long 0
|
|
tx_in: .long 0, 0, 0, 0 // transmitted
|
tx_out: .long 0, 0, 0, 0 // received from host for transmission
|
tx_count: .long 0, 0, 0, 0 // currently in transmit queue
|
|
rx_in: .long 0, 0, 0, 0 // received from port
|
rx_out: .long 0 // transmitted to host
|
parity_bytes: .word 0, 0, 0, 0, 0, 0, 0 // only 4 words are used
|
|
csr_output: .word 0
|
old_csr_output: .word 0, 0, 0, 0, 0, 0, 0
|
.align 4
|
firmware_end: // must be dword-aligned
|
