diff options
Diffstat (limited to 'drivers/scsi/blz2060.c')
| -rw-r--r-- | drivers/scsi/blz2060.c | 306 |
1 files changed, 0 insertions, 306 deletions
diff --git a/drivers/scsi/blz2060.c b/drivers/scsi/blz2060.c deleted file mode 100644 index b6203ec00961..000000000000 --- a/drivers/scsi/blz2060.c +++ /dev/null @@ -1,306 +0,0 @@ -/* blz2060.c: Driver for Blizzard 2060 SCSI Controller. - * - * Copyright (C) 1996 Jesper Skov (jskov@cygnus.co.uk) - * - * This driver is based on the CyberStorm driver, hence the occasional - * reference to CyberStorm. - */ - -/* TODO: - * - * 1) Figure out how to make a cleaner merge with the sparc driver with regard - * to the caches and the Sparc MMU mapping. - * 2) Make as few routines required outside the generic driver. A lot of the - * routines in this file used to be inline! - */ - -#include <linux/module.h> - -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/types.h> -#include <linux/string.h> -#include <linux/slab.h> -#include <linux/blkdev.h> -#include <linux/proc_fs.h> -#include <linux/stat.h> -#include <linux/interrupt.h> - -#include "scsi.h" -#include <scsi/scsi_host.h> -#include "NCR53C9x.h" - -#include <linux/zorro.h> -#include <asm/irq.h> -#include <asm/amigaints.h> -#include <asm/amigahw.h> - -#include <asm/pgtable.h> - -/* The controller registers can be found in the Z2 config area at these - * offsets: - */ -#define BLZ2060_ESP_ADDR 0x1ff00 -#define BLZ2060_DMA_ADDR 0x1ffe0 - - -/* The Blizzard 2060 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 - * - * Figure out interrupt status by reading the ESP status byte. - */ -struct blz2060_dma_registers { - volatile unsigned char dma_led_ctrl; /* DMA led control [0x000] */ - unsigned char dmapad1[0x0f]; - volatile unsigned char dma_addr0; /* DMA address (MSB) [0x010] */ - unsigned char dmapad2[0x03]; - volatile unsigned char dma_addr1; /* DMA address [0x014] */ - unsigned char dmapad3[0x03]; - volatile unsigned char dma_addr2; /* DMA address [0x018] */ - unsigned char dmapad4[0x03]; - volatile unsigned char dma_addr3; /* DMA address (LSB) [0x01c] */ -}; - -#define BLZ2060_DMA_WRITE 0x80000000 - -/* DMA control bits */ -#define BLZ2060_DMA_LED 0x02 /* HD led control 1 = off */ - -static int dma_bytes_sent(struct NCR_ESP *esp, int fifo_count); -static int dma_can_transfer(struct NCR_ESP *esp, Scsi_Cmnd *sp); -static void dma_dump_state(struct NCR_ESP *esp); -static void dma_init_read(struct NCR_ESP *esp, __u32 addr, int length); -static void dma_init_write(struct NCR_ESP *esp, __u32 addr, int length); -static void dma_ints_off(struct NCR_ESP *esp); -static void dma_ints_on(struct NCR_ESP *esp); -static int dma_irq_p(struct NCR_ESP *esp); -static void dma_led_off(struct NCR_ESP *esp); -static void dma_led_on(struct NCR_ESP *esp); -static int dma_ports_p(struct NCR_ESP *esp); -static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write); - -static volatile unsigned char cmd_buffer[16]; - /* This is where all commands are put - * before they are transferred to the ESP chip - * via PIO. - */ - -/***************************************************************** Detection */ -int __init blz2060_esp_detect(struct scsi_host_template *tpnt) -{ - struct NCR_ESP *esp; - struct zorro_dev *z = NULL; - unsigned long address; - - if ((z = zorro_find_device(ZORRO_PROD_PHASE5_BLIZZARD_2060, z))) { - unsigned long board = z->resource.start; - if (request_mem_region(board+BLZ2060_ESP_ADDR, - sizeof(struct ESP_regs), "NCR53C9x")) { - esp = esp_allocate(tpnt, (void *)board + BLZ2060_ESP_ADDR, 0); - - /* Do command transfer with programmed I/O */ - esp->do_pio_cmds = 1; - - /* Required functions */ - esp->dma_bytes_sent = &dma_bytes_sent; - esp->dma_can_transfer = &dma_can_transfer; - esp->dma_dump_state = &dma_dump_state; - esp->dma_init_read = &dma_init_read; - esp->dma_init_write = &dma_init_write; - esp->dma_ints_off = &dma_ints_off; - esp->dma_ints_on = &dma_ints_on; - esp->dma_irq_p = &dma_irq_p; - esp->dma_ports_p = &dma_ports_p; - esp->dma_setup = &dma_setup; - - /* Optional functions */ - esp->dma_barrier = 0; - esp->dma_drain = 0; - esp->dma_invalidate = 0; - esp->dma_irq_entry = 0; - esp->dma_irq_exit = 0; - esp->dma_led_on = &dma_led_on; - esp->dma_led_off = &dma_led_off; - esp->dma_poll = 0; - esp->dma_reset = 0; - - /* SCSI chip speed */ - esp->cfreq = 40000000; - - /* The DMA registers on the Blizzard are mapped - * relative to the device (i.e. in the same Zorro - * I/O block). - */ - address = (unsigned long)ZTWO_VADDR(board); - esp->dregs = (void *)(address + BLZ2060_DMA_ADDR); - - /* ESP register base */ - esp->eregs = (struct ESP_regs *)(address + BLZ2060_ESP_ADDR); - - /* Set the command buffer */ - esp->esp_command = cmd_buffer; - esp->esp_command_dvma = virt_to_bus((void *)cmd_buffer); - - esp->irq = IRQ_AMIGA_PORTS; - request_irq(IRQ_AMIGA_PORTS, esp_intr, IRQF_SHARED, - "Blizzard 2060 SCSI", esp->ehost); - - /* Figure out our scsi ID on the bus */ - esp->scsi_id = 7; - - /* We don't have a differential SCSI-bus. */ - esp->diff = 0; - - esp_initialize(esp); - - printk("ESP: Total of %d ESP hosts found, %d actually in use.\n", nesps, esps_in_use); - esps_running = esps_in_use; - return esps_in_use; - } - } - return 0; -} - -/************************************************************* DMA Functions */ -static int dma_bytes_sent(struct NCR_ESP *esp, int fifo_count) -{ - /* Since the Blizzard DMA is fully dedicated to the ESP chip, - * the number of bytes sent (to the ESP chip) equals the number - * of bytes in the FIFO - there is no buffering in the DMA controller. - * XXXX Do I read this right? It is from host to ESP, right? - */ - return fifo_count; -} - -static int dma_can_transfer(struct NCR_ESP *esp, Scsi_Cmnd *sp) -{ - /* I don't think there's any limit on the Blizzard DMA. So we use what - * the ESP chip can handle (24 bit). - */ - unsigned long sz = sp->SCp.this_residual; - if(sz > 0x1000000) - sz = 0x1000000; - return sz; -} - -static void dma_dump_state(struct NCR_ESP *esp) -{ - ESPLOG(("intreq:<%04x>, intena:<%04x>\n", - amiga_custom.intreqr, amiga_custom.intenar)); -} - -static void dma_init_read(struct NCR_ESP *esp, __u32 addr, int length) -{ - struct blz2060_dma_registers *dregs = - (struct blz2060_dma_registers *) (esp->dregs); - - cache_clear(addr, length); - - addr >>= 1; - addr &= ~(BLZ2060_DMA_WRITE); - dregs->dma_addr3 = (addr ) & 0xff; - dregs->dma_addr2 = (addr >> 8) & 0xff; - dregs->dma_addr1 = (addr >> 16) & 0xff; - dregs->dma_addr0 = (addr >> 24) & 0xff; -} - -static void dma_init_write(struct NCR_ESP *esp, __u32 addr, int length) -{ - struct blz2060_dma_registers *dregs = - (struct blz2060_dma_registers *) (esp->dregs); - - cache_push(addr, length); - - addr >>= 1; - addr |= BLZ2060_DMA_WRITE; - dregs->dma_addr3 = (addr ) & 0xff; - dregs->dma_addr2 = (addr >> 8) & 0xff; - dregs->dma_addr1 = (addr >> 16) & 0xff; - dregs->dma_addr0 = (addr >> 24) & 0xff; -} - -static void dma_ints_off(struct NCR_ESP *esp) -{ - disable_irq(esp->irq); -} - -static void dma_ints_on(struct NCR_ESP *esp) -{ - enable_irq(esp->irq); -} - -static int dma_irq_p(struct NCR_ESP *esp) -{ - return (esp_read(esp->eregs->esp_status) & ESP_STAT_INTR); -} - -static void dma_led_off(struct NCR_ESP *esp) -{ - ((struct blz2060_dma_registers *) (esp->dregs))->dma_led_ctrl = - BLZ2060_DMA_LED; -} - -static void dma_led_on(struct NCR_ESP *esp) -{ - ((struct blz2060_dma_registers *) (esp->dregs))->dma_led_ctrl = 0; -} - -static int dma_ports_p(struct NCR_ESP *esp) -{ - return ((amiga_custom.intenar) & IF_PORTS); -} - -static void dma_setup(struct NCR_ESP *esp, __u32 addr, int count, int write) -{ - /* On the Sparc, DMA_ST_WRITE means "move data from device to memory" - * so when (write) is true, it actually means READ! - */ - if(write){ - dma_init_read(esp, addr, count); - } else { - dma_init_write(esp, addr, count); - } -} - -#define HOSTS_C - -int blz2060_esp_release(struct Scsi_Host *instance) -{ -#ifdef MODULE - unsigned long address = (unsigned long)((struct NCR_ESP *)instance->hostdata)->edev; - - esp_deallocate((struct NCR_ESP *)instance->hostdata); - esp_release(); - release_mem_region(address, sizeof(struct ESP_regs)); - free_irq(IRQ_AMIGA_PORTS, esp_intr); -#endif - return 1; -} - - -static struct scsi_host_template driver_template = { - .proc_name = "esp-blz2060", - .proc_info = esp_proc_info, - .name = "Blizzard2060 SCSI", - .detect = blz2060_esp_detect, - .slave_alloc = esp_slave_alloc, - .slave_destroy = esp_slave_destroy, - .release = blz2060_esp_release, - .queuecommand = esp_queue, - .eh_abort_handler = esp_abort, - .eh_bus_reset_handler = esp_reset, - .can_queue = 7, - .this_id = 7, - .sg_tablesize = SG_ALL, - .cmd_per_lun = 1, - .use_clustering = ENABLE_CLUSTERING -}; - - -#include "scsi_module.c" - -MODULE_LICENSE("GPL"); |