1 /* 2 * This driver adapted from Drew Eckhardt's Trantor T128 driver 3 * 4 * Copyright 1993, Drew Eckhardt 5 * Visionary Computing 6 * (Unix and Linux consulting and custom programming) 7 * drew@colorado.edu 8 * +1 (303) 666-5836 9 * 10 * ( Based on T128 - DISTRIBUTION RELEASE 3. ) 11 * 12 * Modified to work with the Pro Audio Spectrum/Studio 16 13 * by John Weidman. 14 * 15 * 16 * For more information, please consult 17 * 18 * Media Vision 19 * (510) 770-8600 20 * (800) 348-7116 21 * 22 * and 23 * 24 * NCR 5380 Family 25 * SCSI Protocol Controller 26 * Databook 27 * 28 * NCR Microelectronics 29 * 1635 Aeroplaza Drive 30 * Colorado Springs, CO 80916 31 * 1+ (719) 578-3400 32 * 1+ (800) 334-5454 33 */ 34 35 36 #ifndef PAS16_H 37 #define PAS16_H 38 39 #define PAS16_PUBLIC_RELEASE 3 40 41 #define PDEBUG_INIT 0x1 42 #define PDEBUG_TRANSFER 0x2 43 44 #define PAS16_DEFAULT_BASE_1 0x388 45 #define PAS16_DEFAULT_BASE_2 0x384 46 #define PAS16_DEFAULT_BASE_3 0x38c 47 #define PAS16_DEFAULT_BASE_4 0x288 48 49 #define PAS16_DEFAULT_BOARD_1_IRQ 10 50 #define PAS16_DEFAULT_BOARD_2_IRQ 12 51 #define PAS16_DEFAULT_BOARD_3_IRQ 14 52 #define PAS16_DEFAULT_BOARD_4_IRQ 15 53 54 55 /* 56 * The Pro Audio Spectrum boards are I/O mapped. They use a Zilog 5380 57 * SCSI controller, which is the equivalent of NCR's 5380. "Pseudo-DMA" 58 * architecture is used, where a PAL drives the DMA signals on the 5380 59 * allowing fast, blind transfers with proper handshaking. 60 */ 61 62 63 /* The Time-out Counter register is used to safe-guard against a stuck 64 * bus (in the case of RDY driven handshake) or a stuck byte (if 16-Bit 65 * DMA conversion is used). The counter uses a 28.224MHz clock 66 * divided by 14 as its clock source. In the case of a stuck byte in 67 * the holding register, an interrupt is generated (and mixed with the 68 * one with the drive) using the CD-ROM interrupt pointer. 69 */ 70 71 #define P_TIMEOUT_COUNTER_REG 0x4000 72 #define P_TC_DISABLE 0x80 /* Set to 0 to enable timeout int. */ 73 /* Bits D6-D0 contain timeout count */ 74 75 76 #define P_TIMEOUT_STATUS_REG_OFFSET 0x4001 77 #define P_TS_TIM 0x80 /* check timeout status */ 78 /* Bits D6-D4 N/U */ 79 #define P_TS_ARM_DRQ_INT 0x08 /* Arm DRQ Int. When set high, 80 * the next rising edge will 81 * cause a CD-ROM interrupt. 82 * When set low, the interrupt 83 * will be cleared. There is 84 * no status available for 85 * this interrupt. 86 */ 87 #define P_TS_ENABLE_TO_ERR_INTERRUPT /* Enable timeout error int. */ 88 #define P_TS_ENABLE_WAIT /* Enable Wait */ 89 90 #define P_TS_CT 0x01 /* clear timeout. Note: writing 91 * to this register clears the 92 * timeout error int. or status 93 */ 94 95 96 /* 97 * The data register reads/writes to/from the 5380 in pseudo-DMA mode 98 */ 99 100 #define P_DATA_REG_OFFSET 0x5c00 /* rw */ 101 102 #define P_STATUS_REG_OFFSET 0x5c01 /* ro */ 103 #define P_ST_RDY 0x80 /* 5380 DDRQ Status */ 104 105 #define P_IRQ_STATUS 0x5c03 106 #define P_IS_IRQ 0x80 /* DIRQ status */ 107 108 #define PCB_CONFIG 0x803 109 #define MASTER_ADDRESS_PTR 0x9a01 /* Fixed position - no relo */ 110 #define SYS_CONFIG_4 0x8003 111 #define WAIT_STATE 0xbc00 112 #define OPERATION_MODE_1 0xec03 113 #define IO_CONFIG_3 0xf002 114 115 116 #ifndef ASM 117 static int pas16_abort(Scsi_Cmnd *); 118 static int pas16_biosparam(struct scsi_device *, struct block_device *, 119 sector_t, int*); 120 static int pas16_detect(struct scsi_host_template *); 121 static int pas16_queue_command(struct Scsi_Host *, struct scsi_cmnd *); 122 static int pas16_bus_reset(Scsi_Cmnd *); 123 124 #ifndef CMD_PER_LUN 125 #define CMD_PER_LUN 2 126 #endif 127 128 #ifndef CAN_QUEUE 129 #define CAN_QUEUE 32 130 #endif 131 132 #ifndef HOSTS_C 133 134 #define NCR5380_implementation_fields \ 135 volatile unsigned short io_port 136 137 #define NCR5380_local_declare() \ 138 volatile unsigned short io_port 139 140 #define NCR5380_setup(instance) \ 141 io_port = (instance)->io_port 142 143 #define PAS16_io_port(reg) ( io_port + pas16_offset[(reg)] ) 144 145 #if !(PDEBUG & PDEBUG_TRANSFER) 146 #define NCR5380_read(reg) ( inb(PAS16_io_port(reg)) ) 147 #define NCR5380_write(reg, value) ( outb((value),PAS16_io_port(reg)) ) 148 #else 149 #define NCR5380_read(reg) \ 150 (((unsigned char) printk("scsi%d : read register %d at io_port %04x\n"\ 151 , instance->hostno, (reg), PAS16_io_port(reg))), inb( PAS16_io_port(reg)) ) 152 153 #define NCR5380_write(reg, value) \ 154 (printk("scsi%d : write %02x to register %d at io_port %04x\n", \ 155 instance->hostno, (value), (reg), PAS16_io_port(reg)), \ 156 outb( (value),PAS16_io_port(reg) ) ) 157 158 #endif 159 160 161 #define NCR5380_intr pas16_intr 162 #define do_NCR5380_intr do_pas16_intr 163 #define NCR5380_queue_command pas16_queue_command 164 #define NCR5380_abort pas16_abort 165 #define NCR5380_bus_reset pas16_bus_reset 166 #define NCR5380_proc_info pas16_proc_info 167 168 /* 15 14 12 10 7 5 3 169 1101 0100 1010 1000 */ 170 171 #define PAS16_IRQS 0xd4a8 172 173 #endif /* else def HOSTS_C */ 174 #endif /* ndef ASM */ 175 #endif /* PAS16_H */ 176