diff options
Diffstat (limited to 'linux/drivers/net/wan/wanxlfw.S')
| -rw-r--r-- | linux/drivers/net/wan/wanxlfw.S | 895 |
1 files changed, 895 insertions, 0 deletions
diff --git a/linux/drivers/net/wan/wanxlfw.S b/linux/drivers/net/wan/wanxlfw.S new file mode 100644 index 000000000..73aae2bf2 --- /dev/null +++ b/linux/drivers/net/wan/wanxlfw.S @@ -0,0 +1,895 @@ +.psize 0 +/* + wanXL serial card driver for Linux + card firmware part + + Copyright (C) 2003 Krzysztof Halasa <khc@pm.waw.pl> + + This program is free software; you can redistribute it and/or modify it + under the terms of version 2 of the GNU General Public License + as published by the Free Software Foundation. + + + + + DPRAM BDs: + 0x000 - 0x050 TX#0 0x050 - 0x140 RX#0 + 0x140 - 0x190 TX#1 0x190 - 0x280 RX#1 + 0x280 - 0x2D0 TX#2 0x2D0 - 0x3C0 RX#2 + 0x3C0 - 0x410 TX#3 0x410 - 0x500 RX#3 + + + 000 5FF 1536 Bytes Dual-Port RAM User Data / BDs + 600 6FF 256 Bytes Dual-Port RAM User Data / BDs + 700 7FF 256 Bytes Dual-Port RAM User Data / BDs + C00 CBF 192 Bytes Dual-Port RAM Parameter RAM Page 1 + D00 DBF 192 Bytes Dual-Port RAM Parameter RAM Page 2 + E00 EBF 192 Bytes Dual-Port RAM Parameter RAM Page 3 + F00 FBF 192 Bytes Dual-Port RAM Parameter RAM Page 4 + + local interrupts level + NMI 7 + PIT timer, CPM (RX/TX complete) 4 + PCI9060 DMA and PCI doorbells 3 + Cable - not used 1 +*/ + +#include <linux/hdlc.h> +#include "wanxl.h" + +/* memory addresses and offsets */ + +MAX_RAM_SIZE = 16 * 1024 * 1024 // max RAM supported by hardware + +PCI9060_VECTOR = 0x0000006C +CPM_IRQ_BASE = 0x40 +ERROR_VECTOR = CPM_IRQ_BASE * 4 +SCC1_VECTOR = (CPM_IRQ_BASE + 0x1E) * 4 +SCC2_VECTOR = (CPM_IRQ_BASE + 0x1D) * 4 +SCC3_VECTOR = (CPM_IRQ_BASE + 0x1C) * 4 +SCC4_VECTOR = (CPM_IRQ_BASE + 0x1B) * 4 +CPM_IRQ_LEVEL = 4 +TIMER_IRQ = 128 +TIMER_IRQ_LEVEL = 4 +PITR_CONST = 0x100 + 16 // 1 Hz timer + +MBAR = 0x0003FF00 + +VALUE_WINDOW = 0x40000000 +ORDER_WINDOW = 0xC0000000 + +PLX = 0xFFF90000 + +CSRA = 0xFFFB0000 +CSRB = 0xFFFB0002 +CSRC = 0xFFFB0004 +CSRD = 0xFFFB0006 +STATUS_CABLE_LL = 0x2000 +STATUS_CABLE_DTR = 0x1000 + +DPRBASE = 0xFFFC0000 + +SCC1_BASE = DPRBASE + 0xC00 +MISC_BASE = DPRBASE + 0xCB0 +SCC2_BASE = DPRBASE + 0xD00 +SCC3_BASE = DPRBASE + 0xE00 +SCC4_BASE = DPRBASE + 0xF00 + +// offset from SCCx_BASE +// SCC_xBASE contain offsets from DPRBASE and must be divisible by 8 +SCC_RBASE = 0 // 16-bit RxBD base address +SCC_TBASE = 2 // 16-bit TxBD base address +SCC_RFCR = 4 // 8-bit Rx function code +SCC_TFCR = 5 // 8-bit Tx function code +SCC_MRBLR = 6 // 16-bit maximum Rx buffer length +SCC_C_MASK = 0x34 // 32-bit CRC constant +SCC_C_PRES = 0x38 // 32-bit CRC preset +SCC_MFLR = 0x46 // 16-bit max Rx frame length (without flags) + +REGBASE = DPRBASE + 0x1000 +PICR = REGBASE + 0x026 // 16-bit periodic irq control +PITR = REGBASE + 0x02A // 16-bit periodic irq timing +OR1 = REGBASE + 0x064 // 32-bit RAM bank #1 options +CICR = REGBASE + 0x540 // 32(24)-bit CP interrupt config +CIMR = REGBASE + 0x548 // 32-bit CP interrupt mask +CISR = REGBASE + 0x54C // 32-bit CP interrupts in-service +PADIR = REGBASE + 0x550 // 16-bit PortA data direction bitmap +PAPAR = REGBASE + 0x552 // 16-bit PortA pin assignment bitmap +PAODR = REGBASE + 0x554 // 16-bit PortA open drain bitmap +PADAT = REGBASE + 0x556 // 16-bit PortA data register + +PCDIR = REGBASE + 0x560 // 16-bit PortC data direction bitmap +PCPAR = REGBASE + 0x562 // 16-bit PortC pin assignment bitmap +PCSO = REGBASE + 0x564 // 16-bit PortC special options +PCDAT = REGBASE + 0x566 // 16-bit PortC data register +PCINT = REGBASE + 0x568 // 16-bit PortC interrupt control +CR = REGBASE + 0x5C0 // 16-bit Command register + +SCC1_REGS = REGBASE + 0x600 +SCC2_REGS = REGBASE + 0x620 +SCC3_REGS = REGBASE + 0x640 +SCC4_REGS = REGBASE + 0x660 +SICR = REGBASE + 0x6EC // 32-bit SI clock route + +// offset from SCCx_REGS +SCC_GSMR_L = 0x00 // 32 bits +SCC_GSMR_H = 0x04 // 32 bits +SCC_PSMR = 0x08 // 16 bits +SCC_TODR = 0x0C // 16 bits +SCC_DSR = 0x0E // 16 bits +SCC_SCCE = 0x10 // 16 bits +SCC_SCCM = 0x14 // 16 bits +SCC_SCCS = 0x17 // 8 bits + +#if QUICC_MEMCPY_USES_PLX + .macro memcpy_from_pci src, dest, len // len must be < 8 MB + addl #3, \len + andl #0xFFFFFFFC, \len // always copy n * 4 bytes + movel \src, PLX_DMA_0_PCI + movel \dest, PLX_DMA_0_LOCAL + movel \len, PLX_DMA_0_LENGTH + movel #0x0103, PLX_DMA_CMD_STS // start channel 0 transfer + bsr memcpy_from_pci_run + .endm + + .macro memcpy_to_pci src, dest, len + addl #3, \len + andl #0xFFFFFFFC, \len // always copy n * 4 bytes + movel \src, PLX_DMA_1_LOCAL + movel \dest, PLX_DMA_1_PCI + movel \len, PLX_DMA_1_LENGTH + movel #0x0301, PLX_DMA_CMD_STS // start channel 1 transfer + bsr memcpy_to_pci_run + .endm + +#else + + .macro memcpy src, dest, len // len must be < 65536 bytes + movel %d7, -(%sp) // src and dest must be < 256 MB + movel \len, %d7 // bits 0 and 1 + lsrl #2, \len + andl \len, \len + beq 99f // only 0 - 3 bytes + subl #1, \len // for dbf +98: movel (\src)+, (\dest)+ + dbfw \len, 98b +99: movel %d7, \len + btstl #1, \len + beq 99f + movew (\src)+, (\dest)+ +99: btstl #0, \len + beq 99f + moveb (\src)+, (\dest)+ +99: + movel (%sp)+, %d7 + .endm + + .macro memcpy_from_pci src, dest, len + addl #VALUE_WINDOW, \src + memcpy \src, \dest, \len + .endm + + .macro memcpy_to_pci src, dest, len + addl #VALUE_WINDOW, \dest + memcpy \src, \dest, \len + .endm +#endif + + + .macro wait_for_command +99: btstl #0, CR + bne 99b + .endm + + + + +/****************************** card initialization *******************/ + .text + .global _start +_start: bra init + + .org _start + 4 +ch_status_addr: .long 0, 0, 0, 0 +rx_descs_addr: .long 0 + +init: +#if DETECT_RAM + movel OR1, %d0 + andl #0xF00007FF, %d0 // mask AMxx bits + orl #0xFFFF800 & ~(MAX_RAM_SIZE - 1), %d0 // update RAM bank size + movel %d0, OR1 +#endif + + addl #VALUE_WINDOW, rx_descs_addr // PCI addresses of shared data + clrl %d0 // D0 = 4 * port +init_1: tstl ch_status_addr(%d0) + beq init_2 + addl #VALUE_WINDOW, ch_status_addr(%d0) +init_2: addl #4, %d0 + cmpl #4 * 4, %d0 + bne init_1 + + movel #pci9060_interrupt, PCI9060_VECTOR + movel #error_interrupt, ERROR_VECTOR + movel #port_interrupt_1, SCC1_VECTOR + movel #port_interrupt_2, SCC2_VECTOR + movel #port_interrupt_3, SCC3_VECTOR + movel #port_interrupt_4, SCC4_VECTOR + movel #timer_interrupt, TIMER_IRQ * 4 + + movel #0x78000000, CIMR // only SCCx IRQs from CPM + movew #(TIMER_IRQ_LEVEL << 8) + TIMER_IRQ, PICR // interrupt from PIT + movew #PITR_CONST, PITR + + // SCC1=SCCa SCC2=SCCb SCC3=SCCc SCC4=SCCd prio=4 HP=-1 IRQ=64-79 + movel #0xD41F40 + (CPM_IRQ_LEVEL << 13), CICR + movel #0x543, PLX_DMA_0_MODE // 32-bit, Ready, Burst, IRQ + movel #0x543, PLX_DMA_1_MODE + movel #0x0, PLX_DMA_0_DESC // from PCI to local + movel #0x8, PLX_DMA_1_DESC // from local to PCI + movel #0x101, PLX_DMA_CMD_STS // enable both DMA channels + // enable local IRQ, DMA, doorbells and PCI IRQ + orl #0x000F0300, PLX_INTERRUPT_CS + +#if DETECT_RAM + bsr ram_test +#else + movel #1, PLX_MAILBOX_5 // non-zero value = init complete +#endif + bsr check_csr + + movew #0xFFFF, PAPAR // all pins are clocks/data + clrw PADIR // first function + clrw PCSO // CD and CTS always active + + +/****************************** main loop *****************************/ + +main: movel channel_stats, %d7 // D7 = doorbell + irq status + clrl channel_stats + + tstl %d7 + bne main_1 + // nothing to do - wait for next event + stop #0x2200 // supervisor + IRQ level 2 + movew #0x2700, %sr // disable IRQs again + bra main + +main_1: clrl %d0 // D0 = 4 * port + clrl %d6 // D6 = doorbell to host value + +main_l: btstl #DOORBELL_TO_CARD_CLOSE_0, %d7 + beq main_op + bclrl #DOORBELL_TO_CARD_OPEN_0, %d7 // in case both bits are set + bsr close_port +main_op: + btstl #DOORBELL_TO_CARD_OPEN_0, %d7 + beq main_cl + bsr open_port +main_cl: + btstl #DOORBELL_TO_CARD_TX_0, %d7 + beq main_txend + bsr tx +main_txend: + btstl #TASK_SCC_0, %d7 + beq main_next + bsr tx_end + bsr rx + +main_next: + lsrl #1, %d7 // port status for next port + addl #4, %d0 // D0 = 4 * next port + cmpl #4 * 4, %d0 + bne main_l + movel %d6, PLX_DOORBELL_FROM_CARD // signal the host + bra main + + +/****************************** open port *****************************/ + +open_port: // D0 = 4 * port, D6 = doorbell to host + movel ch_status_addr(%d0), %a0 // A0 = port status address + tstl STATUS_OPEN(%a0) + bne open_port_ret // port already open + movel #1, STATUS_OPEN(%a0) // confirm the port is open +// setup BDs + clrl tx_in(%d0) + clrl tx_out(%d0) + clrl tx_count(%d0) + clrl rx_in(%d0) + + movel SICR, %d1 // D1 = clock settings in SICR + andl clocking_mask(%d0), %d1 + cmpl #CLOCK_TXFROMRX, STATUS_CLOCKING(%a0) + bne open_port_clock_ext + orl clocking_txfromrx(%d0), %d1 + bra open_port_set_clock + +open_port_clock_ext: + orl clocking_ext(%d0), %d1 +open_port_set_clock: + movel %d1, SICR // update clock settings in SICR + + orw #STATUS_CABLE_DTR, csr_output(%d0) // DTR on + bsr check_csr // call with disabled timer interrupt + +// Setup TX descriptors + movel first_buffer(%d0), %d1 // D1 = starting buffer address + movel tx_first_bd(%d0), %a1 // A1 = starting TX BD address + movel #TX_BUFFERS - 2, %d2 // D2 = TX_BUFFERS - 1 counter + movel #0x18000000, %d3 // D3 = initial TX BD flags: Int + Last + cmpl #PARITY_NONE, STATUS_PARITY(%a0) + beq open_port_tx_loop + bsetl #26, %d3 // TX BD flag: Transmit CRC +open_port_tx_loop: + movel %d3, (%a1)+ // TX flags + length + movel %d1, (%a1)+ // buffer address + addl #BUFFER_LENGTH, %d1 + dbfw %d2, open_port_tx_loop + + bsetl #29, %d3 // TX BD flag: Wrap (last BD) + movel %d3, (%a1)+ // Final TX flags + length + movel %d1, (%a1)+ // buffer address + +// Setup RX descriptors // A1 = starting RX BD address + movel #RX_BUFFERS - 2, %d2 // D2 = RX_BUFFERS - 1 counter +open_port_rx_loop: + movel #0x90000000, (%a1)+ // RX flags + length + movel %d1, (%a1)+ // buffer address + addl #BUFFER_LENGTH, %d1 + dbfw %d2, open_port_rx_loop + + movel #0xB0000000, (%a1)+ // Final RX flags + length + movel %d1, (%a1)+ // buffer address + +// Setup port parameters + movel scc_base_addr(%d0), %a1 // A1 = SCC_BASE address + movel scc_reg_addr(%d0), %a2 // A2 = SCC_REGS address + + movel #0xFFFF, SCC_SCCE(%a2) // clear status bits + movel #0x0000, SCC_SCCM(%a2) // interrupt mask + + movel tx_first_bd(%d0), %d1 + movew %d1, SCC_TBASE(%a1) // D1 = offset of first TxBD + addl #TX_BUFFERS * 8, %d1 + movew %d1, SCC_RBASE(%a1) // D1 = offset of first RxBD + moveb #0x8, SCC_RFCR(%a1) // Intel mode, 1000 + moveb #0x8, SCC_TFCR(%a1) + +// Parity settings + cmpl #PARITY_CRC16_PR1_CCITT, STATUS_PARITY(%a0) + bne open_port_parity_1 + clrw SCC_PSMR(%a2) // CRC16-CCITT + movel #0xF0B8, SCC_C_MASK(%a1) + movel #0xFFFF, SCC_C_PRES(%a1) + movew #HDLC_MAX_MRU + 2, SCC_MFLR(%a1) // 2 bytes for CRC + movew #2, parity_bytes(%d0) + bra open_port_2 + +open_port_parity_1: + cmpl #PARITY_CRC32_PR1_CCITT, STATUS_PARITY(%a0) + bne open_port_parity_2 + movew #0x0800, SCC_PSMR(%a2) // CRC32-CCITT + movel #0xDEBB20E3, SCC_C_MASK(%a1) + movel #0xFFFFFFFF, SCC_C_PRES(%a1) + movew #HDLC_MAX_MRU + 4, SCC_MFLR(%a1) // 4 bytes for CRC + movew #4, parity_bytes(%d0) + bra open_port_2 + +open_port_parity_2: + cmpl #PARITY_CRC16_PR0_CCITT, STATUS_PARITY(%a0) + bne open_port_parity_3 + clrw SCC_PSMR(%a2) // CRC16-CCITT preset 0 + movel #0xF0B8, SCC_C_MASK(%a1) + clrl SCC_C_PRES(%a1) + movew #HDLC_MAX_MRU + 2, SCC_MFLR(%a1) // 2 bytes for CRC + movew #2, parity_bytes(%d0) + bra open_port_2 + +open_port_parity_3: + cmpl #PARITY_CRC32_PR0_CCITT, STATUS_PARITY(%a0) + bne open_port_parity_4 + movew #0x0800, SCC_PSMR(%a2) // CRC32-CCITT preset 0 + movel #0xDEBB20E3, SCC_C_MASK(%a1) + clrl SCC_C_PRES(%a1) + movew #HDLC_MAX_MRU + 4, SCC_MFLR(%a1) // 4 bytes for CRC + movew #4, parity_bytes(%d0) + bra open_port_2 + +open_port_parity_4: + clrw SCC_PSMR(%a2) // no parity + movel #0xF0B8, SCC_C_MASK(%a1) + movel #0xFFFF, SCC_C_PRES(%a1) + movew #HDLC_MAX_MRU, SCC_MFLR(%a1) // 0 bytes for CRC + clrw parity_bytes(%d0) + +open_port_2: + movel #0x00000003, SCC_GSMR_H(%a2) // RTSM + cmpl #ENCODING_NRZI, STATUS_ENCODING(%a0) + bne open_port_nrz + movel #0x10040900, SCC_GSMR_L(%a2) // NRZI: TCI Tend RECN+TENC=1 + bra open_port_3 + +open_port_nrz: + movel #0x10040000, SCC_GSMR_L(%a2) // NRZ: TCI Tend RECN+TENC=0 +open_port_3: + movew #BUFFER_LENGTH, SCC_MRBLR(%a1) + movel %d0, %d1 + lsll #4, %d1 // D1 bits 7 and 6 = port + orl #1, %d1 + movew %d1, CR // Init SCC RX and TX params + wait_for_command + + // TCI Tend ENR ENT + movew #0x001F, SCC_SCCM(%a2) // TXE RXF BSY TXB RXB interrupts + orl #0x00000030, SCC_GSMR_L(%a2) // enable SCC +open_port_ret: + rts + + +/****************************** close port ****************************/ + +close_port: // D0 = 4 * port, D6 = doorbell to host + movel scc_reg_addr(%d0), %a0 // A0 = SCC_REGS address + clrw SCC_SCCM(%a0) // no SCC interrupts + andl #0xFFFFFFCF, SCC_GSMR_L(%a0) // Disable ENT and ENR + + andw #~STATUS_CABLE_DTR, csr_output(%d0) // DTR off + bsr check_csr // call with disabled timer interrupt + + movel ch_status_addr(%d0), %d1 + clrl STATUS_OPEN(%d1) // confirm the port is closed + rts + + +/****************************** transmit packet ***********************/ +// queue packets for transmission +tx: // D0 = 4 * port, D6 = doorbell to host + cmpl #TX_BUFFERS, tx_count(%d0) + beq tx_ret // all DB's = descs in use + + movel tx_out(%d0), %d1 + movel %d1, %d2 // D1 = D2 = tx_out BD# = desc# + mulul #DESC_LENGTH, %d2 // D2 = TX desc offset + addl ch_status_addr(%d0), %d2 + addl #STATUS_TX_DESCS, %d2 // D2 = TX desc address + cmpl #PACKET_FULL, (%d2) // desc status + bne tx_ret + +// queue it + movel 4(%d2), %a0 // PCI address + lsll #3, %d1 // BD is 8-bytes long + addl tx_first_bd(%d0), %d1 // D1 = current tx_out BD addr + + movel 4(%d1), %a1 // A1 = dest address + movel 8(%d2), %d2 // D2 = length + movew %d2, 2(%d1) // length into BD + memcpy_from_pci %a0, %a1, %d2 + bsetl #31, (%d1) // CP go ahead + +// update tx_out and tx_count + movel tx_out(%d0), %d1 + addl #1, %d1 + cmpl #TX_BUFFERS, %d1 + bne tx_1 + clrl %d1 +tx_1: movel %d1, tx_out(%d0) + + addl #1, tx_count(%d0) + bra tx + +tx_ret: rts + + +/****************************** packet received ***********************/ + +// Service receive buffers // D0 = 4 * port, D6 = doorbell to host +rx: movel rx_in(%d0), %d1 // D1 = rx_in BD# + lsll #3, %d1 // BD is 8-bytes long + addl rx_first_bd(%d0), %d1 // D1 = current rx_in BD address + movew (%d1), %d2 // D2 = RX BD flags + btstl #15, %d2 + bne rx_ret // BD still empty + + btstl #1, %d2 + bne rx_overrun + + tstw parity_bytes(%d0) + bne rx_parity + bclrl #2, %d2 // do not test for CRC errors +rx_parity: + andw #0x0CBC, %d2 // mask status bits + cmpw #0x0C00, %d2 // correct frame + bne rx_bad_frame + clrl %d3 + movew 2(%d1), %d3 + subw parity_bytes(%d0), %d3 // D3 = packet length + cmpw #HDLC_MAX_MRU, %d3 + bgt rx_bad_frame + +rx_good_frame: + movel rx_out, %d2 + mulul #DESC_LENGTH, %d2 + addl rx_descs_addr, %d2 // D2 = RX desc address + cmpl #PACKET_EMPTY, (%d2) // desc stat + bne rx_overrun + + movel %d3, 8(%d2) + movel 4(%d1), %a0 // A0 = source address + movel 4(%d2), %a1 + tstl %a1 + beq rx_ignore_data + memcpy_to_pci %a0, %a1, %d3 +rx_ignore_data: + movel packet_full(%d0), (%d2) // update desc stat + +// update D6 and rx_out + bsetl #DOORBELL_FROM_CARD_RX, %d6 // signal host that RX completed + movel rx_out, %d2 + addl #1, %d2 + cmpl #RX_QUEUE_LENGTH, %d2 + bne rx_1 + 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 |