| /* blz1230.h: Defines and structures for the Blizzard 1230 SCSI IV driver. |
| * |
| * Copyright (C) 1996 Jesper Skov (jskov@cygnus.co.uk) |
| * |
| * This file is based on cyber_esp.h (hence the occasional reference to |
| * CyberStorm). |
| */ |
| |
| #include "NCR53C9x.h" |
| |
| #ifndef BLZ1230_H |
| #define BLZ1230_H |
| |
| /* The controller registers can be found in the Z2 config area at these |
| * offsets: |
| */ |
| #define BLZ1230_ESP_ADDR 0x8000 |
| #define BLZ1230_DMA_ADDR 0x10000 |
| #define BLZ1230II_ESP_ADDR 0x10000 |
| #define BLZ1230II_DMA_ADDR 0x10021 |
| |
| |
| /* The Blizzard 1230 DMA interface |
| * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| * Only two things can be programmed in the Blizzard DMA: |
| * 1) The data direction is controlled by the status of bit 31 (1 = write) |
| * 2) The source/dest address (word aligned, shifted one right) in bits 30-0 |
| * |
| * Program DMA by first latching the highest byte of the address/direction |
| * (i.e. bits 31-24 of the long word constructed as described in steps 1+2 |
| * above). Then write each byte of the address/direction (starting with the |
| * top byte, working down) to the DMA address register. |
| * |
| * Figure out interrupt status by reading the ESP status byte. |
| */ |
| struct blz1230_dma_registers { |
| volatile unsigned char dma_addr; /* DMA address [0x0000] */ |
| unsigned char dmapad2[0x7fff]; |
| volatile unsigned char dma_latch; /* DMA latch [0x8000] */ |
| }; |
| |
| struct blz1230II_dma_registers { |
| volatile unsigned char dma_addr; /* DMA address [0x0000] */ |
| unsigned char dmapad2[0xf]; |
| volatile unsigned char dma_latch; /* DMA latch [0x0010] */ |
| }; |
| |
| #define BLZ1230_DMA_WRITE 0x80000000 |
| |
| extern int blz1230_esp_detect(struct SHT *); |
| extern int blz1230_esp_release(struct Scsi_Host *); |
| extern const char *esp_info(struct Scsi_Host *); |
| extern int esp_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *)); |
| extern int esp_command(Scsi_Cmnd *); |
| extern int esp_abort(Scsi_Cmnd *); |
| extern int esp_reset(Scsi_Cmnd *, unsigned int); |
| extern int esp_proc_info(char *buffer, char **start, off_t offset, int length, |
| int hostno, int inout); |
| |
| #define SCSI_BLZ1230 { proc_name: "esp-blz1230", \ |
| proc_info: esp_proc_info, \ |
| name: "Blizzard1230 SCSI IV", \ |
| detect: blz1230_esp_detect, \ |
| release: blz1230_esp_release, \ |
| command: esp_command, \ |
| queuecommand: esp_queue, \ |
| abort: esp_abort, \ |
| reset: esp_reset, \ |
| can_queue: 7, \ |
| this_id: 7, \ |
| sg_tablesize: SG_ALL, \ |
| cmd_per_lun: 1, \ |
| use_clustering: ENABLE_CLUSTERING } |
| |
| #endif /* BLZ1230_H */ |