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/*
* dec_esp.c: Driver for SCSI chips on IOASIC based TURBOchannel DECstations
* and TURBOchannel PMAZ-A cards
*
* TURBOchannel changes by Harald Koerfgen
* PMAZ-A support by David Airlie
*
* based on jazz_esp.c:
* Copyright (C) 1997 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
*
* jazz_esp is based on David S. Miller's ESP driver and cyber_esp
*
* 20000819 - Small PMAZ-AA fixes by Florian Lohoff <flo@rfc822.org>
* Be warned the PMAZ-AA works currently as a single card.
* Dont try to put multiple cards in one machine - They are
* both detected but it may crash under high load garbling your
* data.
* 20001005 - Initialization fixes for 2.4.0-test9
* Florian Lohoff <flo@rfc822.org>
*
* Copyright (C) 2002, 2003, 2005 Maciej W. Rozycki
*/
#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/spinlock.h>
#include <linux/stat.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/dec/interrupts.h>
#include <asm/dec/ioasic.h>
#include <asm/dec/ioasic_addrs.h>
#include <asm/dec/ioasic_ints.h>
#include <asm/dec/machtype.h>
#include <asm/dec/system.h>
#include <asm/dec/tc.h>
#define DEC_SCSI_SREG 0
#define DEC_SCSI_DMAREG 0x40000
#define DEC_SCSI_SRAM 0x80000
#define DEC_SCSI_DIAG 0xC0000
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "NCR53C9x.h"
static int dma_bytes_sent(struct NCR_ESP *esp, int fifo_count);
static void dma_drain(struct NCR_ESP *esp);
static int dma_can_transfer(struct NCR_ESP *esp, struct scsi_cmnd *sp);
static void dma_dump_state(struct NCR_ESP *esp);
static void dma_init_read(struct NCR_ESP *esp, u32 vaddress, int length);
static void dma_init_write(struct NCR_ESP *esp, u32 vaddress, 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 int dma_ports_p(struct NCR_ESP *esp);
static void dma_setup(struct NCR_ESP *esp, u32 addr, int count, int write);
static void dma_mmu_get_scsi_one(struct NCR_ESP *esp, struct scsi_cmnd * sp);
static void dma_mmu_get_scsi_sgl(struct NCR_ESP *esp, struct scsi_cmnd * sp);
static void dma_advance_sg(struct scsi_cmnd * sp);
static void pmaz_dma_drain(struct NCR_ESP *esp);
static void pmaz_dma_init_read(struct NCR_ESP *esp, u32 vaddress, int length);
static void pmaz_dma_init_write(struct NCR_ESP *esp, u32 vaddress, int length);
static void pmaz_dma_ints_off(struct NCR_ESP *esp);
static void pmaz_dma_ints_on(struct NCR_ESP *esp);
static void pmaz_dma_setup(struct NCR_ESP *esp, u32 addr, int count, int write);
static void pmaz_dma_mmu_get_scsi_one(struct NCR_ESP *esp, struct scsi_cmnd * sp);
#define TC_ESP_RAM_SIZE 0x20000
#define ESP_TGT_DMA_SIZE ((TC_ESP_RAM_SIZE/7) & ~(sizeof(int)-1))
#define ESP_NCMD 7
#define TC_ESP_DMAR_MASK 0x1ffff
#define TC_ESP_DMAR_WRITE 0x80000000
#define TC_ESP_DMA_ADDR(x) ((unsigned)(x) & TC_ESP_DMAR_MASK)
u32 esp_virt_buffer;
int scsi_current_length;
volatile unsigned char cmd_buffer[16];
volatile unsigned char pmaz_cmd_buffer[16];
/* This is where all commands are put
* before they are trasfered to the ESP chip
* via PIO.
*/
static irqreturn_t scsi_dma_merr_int(int, void *, struct pt_regs *);
static irqreturn_t scsi_dma_err_int(int, void *, struct pt_regs *);
static irqreturn_t scsi_dma_int(int, void *, struct pt_regs *);
static int dec_esp_detect(struct scsi_host_template * tpnt);
static int dec_esp_release(struct Scsi_Host *shost)
{
if (shost->irq)
free_irq(shost->irq, NULL);
if (shost->io_port && shost->n_io_port)
release_region(shost->io_port, shost->n_io_port);
scsi_unregister(shost);
return 0;
}
static struct scsi_host_template driver_template = {
.proc_name = "dec_esp",
.proc_info = esp_proc_info,
.name = "NCR53C94",
.detect = dec_esp_detect,
.slave_alloc = esp_slave_alloc,
.slave_destroy = esp_slave_destroy,
.release = dec_esp_release,
.info = esp_info,
.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 = DISABLE_CLUSTERING,
};
#include "scsi_module.c"
/***************************************************************** Detection */
static int dec_esp_detect(Scsi_Host_Template * tpnt)
{
struct NCR_ESP *esp;
struct ConfigDev *esp_dev;
int slot;
unsigned long mem_start;
if (IOASIC) {
esp_dev = 0;
esp = esp_allocate(tpnt, (void *) esp_dev);
/* 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 = &dma_drain;
esp->dma_invalidate = 0;
esp->dma_irq_entry = 0;
esp->dma_irq_exit = 0;
esp->dma_poll = 0;
esp->dma_reset = 0;
esp->dma_led_off = 0;
esp->dma_led_on = 0;
/* virtual DMA functions */
esp->dma_mmu_get_scsi_one = &dma_mmu_get_scsi_one;
esp->dma_mmu_get_scsi_sgl = &dma_mmu_get_scsi_sgl;
esp->dma_mmu_release_scsi_one = 0;
esp->dma_mmu_release_scsi_sgl = 0;
esp->dma_advance_sg = &dma_advance_sg;
/* SCSI chip speed */
esp->cfreq = 25000000;
esp->dregs = 0;
/* ESP register base */
esp->eregs = (void *)CKSEG1ADDR(dec_kn_slot_base +
IOASIC_SCSI);
/* Set the command buffer */
esp->esp_command = (volatile unsigned char *) cmd_buffer;
/* get virtual dma address for command buffer */
esp->esp_command_dvma = virt_to_phys(cmd_buffer);
esp->irq = dec_interrupt[DEC_IRQ_ASC];
esp->scsi_id = 7;
/* Check for differential SCSI-bus */
esp->diff = 0;
esp_initialize(esp);
if (request_irq(esp->irq, esp_intr, SA_INTERRUPT,
"ncr53c94", esp->ehost))
goto err_dealloc;
if (request_irq(dec_interrupt[DEC_IRQ_ASC_MERR],
scsi_dma_merr_int, SA_INTERRUPT,
"ncr53c94 error", esp->ehost))
goto err_free_irq;
if (request_irq(dec_interrupt[DEC_IRQ_ASC_ERR],
scsi_dma_err_int, SA_INTERRUPT,
"ncr53c94 overrun"
|