+++ /dev/null
-/*
- * DTC 3180/3280 driver, by
- * Ray Van Tassle rayvt@comm.mot.com
- *
- * taken from ...
- * Trantor T128/T128F/T228 driver by...
- *
- * Drew Eckhardt
- * Visionary Computing
- * (Unix and Linux consulting and custom programming)
- * drew@colorado.edu
- * +1 (303) 440-4894
- */
-
-/*
- * The card is detected and initialized in one of several ways :
- * 1. Autoprobe (default) - since the board is memory mapped,
- * a BIOS signature is scanned for to locate the registers.
- * An interrupt is triggered to autoprobe for the interrupt
- * line.
- *
- * 2. With command line overrides - dtc=address,irq may be
- * used on the LILO command line to override the defaults.
- *
-*/
-
-/*----------------------------------------------------------------*/
-/* the following will set the monitor border color (useful to find
- where something crashed or gets stuck at */
-/* 1 = blue
- 2 = green
- 3 = cyan
- 4 = red
- 5 = magenta
- 6 = yellow
- 7 = white
-*/
-#if 0
-#define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
-#else
-#define rtrc(i) {}
-#endif
-
-
-#include <linux/module.h>
-#include <linux/blkdev.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <scsi/scsi_host.h>
-
-#include "dtc.h"
-#include "NCR5380.h"
-
-/*
- * The DTC3180 & 3280 boards are memory mapped.
- *
- */
-
-/*
- */
-/* Offset from DTC_5380_OFFSET */
-#define DTC_CONTROL_REG 0x100 /* rw */
-#define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */
-#define CSR_DIR_READ 0x40 /* rw direction, 1 = read 0 = write */
-
-#define CSR_RESET 0x80 /* wo Resets 53c400 */
-#define CSR_5380_REG 0x80 /* ro 5380 registers can be accessed */
-#define CSR_TRANS_DIR 0x40 /* rw Data transfer direction */
-#define CSR_SCSI_BUFF_INTR 0x20 /* rw Enable int on transfer ready */
-#define CSR_5380_INTR 0x10 /* rw Enable 5380 interrupts */
-#define CSR_SHARED_INTR 0x08 /* rw Interrupt sharing */
-#define CSR_HOST_BUF_NOT_RDY 0x04 /* ro Host buffer not ready */
-#define CSR_SCSI_BUF_RDY 0x02 /* ro SCSI buffer ready */
-#define CSR_GATED_5380_IRQ 0x01 /* ro Last block xferred */
-#define CSR_INT_BASE (CSR_SCSI_BUFF_INTR | CSR_5380_INTR)
-
-
-#define DTC_BLK_CNT 0x101 /* rw
- * # of 128-byte blocks to transfer */
-
-
-#define D_CR_ACCESS 0x80 /* ro set=can access 3280 registers */
-
-#define DTC_SWITCH_REG 0x3982 /* ro - DIP switches */
-#define DTC_RESUME_XFER 0x3982 /* wo - resume data xfer
- * after disconnect/reconnect*/
-
-#define DTC_5380_OFFSET 0x3880 /* 8 registers here, see NCR5380.h */
-
-/*!!!! for dtc, it's a 128 byte buffer at 3900 !!! */
-#define DTC_DATA_BUF 0x3900 /* rw 128 bytes long */
-
-static struct override {
- unsigned int address;
- int irq;
-} overrides
-#ifdef OVERRIDE
-[] __initdata = OVERRIDE;
-#else
-[4] __initdata = {
- { 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO }, { 0, IRQ_AUTO }
-};
-#endif
-
-#define NO_OVERRIDES ARRAY_SIZE(overrides)
-
-static struct base {
- unsigned long address;
- int noauto;
-} bases[] __initdata = {
- { 0xcc000, 0 },
- { 0xc8000, 0 },
- { 0xdc000, 0 },
- { 0xd8000, 0 }
-};
-
-#define NO_BASES ARRAY_SIZE(bases)
-
-static const struct signature {
- const char *string;
- int offset;
-} signatures[] = {
- {"DATA TECHNOLOGY CORPORATION BIOS", 0x25},
-};
-
-#define NO_SIGNATURES ARRAY_SIZE(signatures)
-
-#ifndef MODULE
-/*
- * Function : dtc_setup(char *str, int *ints)
- *
- * Purpose : LILO command line initialization of the overrides array,
- *
- * Inputs : str - unused, ints - array of integer parameters with ints[0]
- * equal to the number of ints.
- *
- */
-
-static int __init dtc_setup(char *str)
-{
- static int commandline_current;
- int i;
- int ints[10];
-
- get_options(str, ARRAY_SIZE(ints), ints);
- if (ints[0] != 2)
- printk("dtc_setup: usage dtc=address,irq\n");
- else if (commandline_current < NO_OVERRIDES) {
- overrides[commandline_current].address = ints[1];
- overrides[commandline_current].irq = ints[2];
- for (i = 0; i < NO_BASES; ++i)
- if (bases[i].address == ints[1]) {
- bases[i].noauto = 1;
- break;
- }
- ++commandline_current;
- }
- return 1;
-}
-
-__setup("dtc=", dtc_setup);
-#endif
-
-/*
- * Function : int dtc_detect(struct scsi_host_template * tpnt)
- *
- * Purpose : detects and initializes DTC 3180/3280 controllers
- * that were autoprobed, overridden on the LILO command line,
- * or specified at compile time.
- *
- * Inputs : tpnt - template for this SCSI adapter.
- *
- * Returns : 1 if a host adapter was found, 0 if not.
- *
-*/
-
-static int __init dtc_detect(struct scsi_host_template * tpnt)
-{
- static int current_override, current_base;
- struct Scsi_Host *instance;
- unsigned int addr;
- void __iomem *base;
- int sig, count;
-
- for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
- addr = 0;
- base = NULL;
-
- if (overrides[current_override].address) {
- addr = overrides[current_override].address;
- base = ioremap(addr, 0x2000);
- if (!base)
- addr = 0;
- } else
- for (; !addr && (current_base < NO_BASES); ++current_base) {
- dprintk(NDEBUG_INIT, "dtc: probing address 0x%08x\n",
- (unsigned int)bases[current_base].address);
- if (bases[current_base].noauto)
- continue;
- base = ioremap(bases[current_base].address, 0x2000);
- if (!base)
- continue;
- for (sig = 0; sig < NO_SIGNATURES; ++sig) {
- if (check_signature(base + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) {
- addr = bases[current_base].address;
- dprintk(NDEBUG_INIT, "dtc: detected board\n");
- goto found;
- }
- }
- iounmap(base);
- }
-
- dprintk(NDEBUG_INIT, "dtc: addr = 0x%08x\n", addr);
-
- if (!addr)
- break;
-
-found:
- instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata));
- if (instance == NULL)
- goto out_unmap;
-
- instance->base = addr;
- ((struct NCR5380_hostdata *)(instance)->hostdata)->base = base;
-
- if (NCR5380_init(instance, FLAG_LATE_DMA_SETUP))
- goto out_unregister;
-
- NCR5380_maybe_reset_bus(instance);
-
- NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR); /* Enable int's */
- if (overrides[current_override].irq != IRQ_AUTO)
- instance->irq = overrides[current_override].irq;
- else
- instance->irq = NCR5380_probe_irq(instance, DTC_IRQS);
-
- /* Compatibility with documented NCR5380 kernel parameters */
- if (instance->irq == 255)
- instance->irq = NO_IRQ;
-
- /* With interrupts enabled, it will sometimes hang when doing heavy
- * reads. So better not enable them until I finger it out. */
- instance->irq = NO_IRQ;
-
- if (instance->irq != NO_IRQ)
- if (request_irq(instance->irq, dtc_intr, 0,
- "dtc", instance)) {
- printk(KERN_ERR "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq);
- instance->irq = NO_IRQ;
- }
-
- if (instance->irq == NO_IRQ) {
- printk(KERN_WARNING "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
- printk(KERN_WARNING "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
- }
-
- dprintk(NDEBUG_INIT, "scsi%d : irq = %d\n",
- instance->host_no, instance->irq);
-
- ++current_override;
- ++count;
- }
- return count;
-
-out_unregister:
- scsi_unregister(instance);
-out_unmap:
- iounmap(base);
- return count;
-}
-
-/*
- * Function : int dtc_biosparam(Disk * disk, struct block_device *dev, int *ip)
- *
- * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
- * the specified device / size.
- *
- * Inputs : size = size of device in sectors (512 bytes), dev = block device
- * major / minor, ip[] = {heads, sectors, cylinders}
- *
- * Returns : always 0 (success), initializes ip
- *
-*/
-
-/*
- * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
- * using hard disks on a trantor should verify that this mapping corresponds
- * to that used by the BIOS / ASPI driver by running the linux fdisk program
- * and matching the H_C_S coordinates to what DOS uses.
-*/
-
-static int dtc_biosparam(struct scsi_device *sdev, struct block_device *dev,
- sector_t capacity, int *ip)
-{
- int size = capacity;
-
- ip[0] = 64;
- ip[1] = 32;
- ip[2] = size >> 11;
- return 0;
-}
-
-
-/****************************************************************
- * Function : int NCR5380_pread (struct Scsi_Host *instance,
- * unsigned char *dst, int len)
- *
- * Purpose : Fast 5380 pseudo-dma read function, reads len bytes to
- * dst
- *
- * Inputs : dst = destination, len = length in bytes
- *
- * Returns : 0 on success, non zero on a failure such as a watchdog
- * timeout.
-*/
-
-static inline int dtc_pread(struct Scsi_Host *instance,
- unsigned char *dst, int len)
-{
- unsigned char *d = dst;
- int i; /* For counting time spent in the poll-loop */
- struct NCR5380_hostdata *hostdata = shost_priv(instance);
-
- i = 0;
- if (instance->irq == NO_IRQ)
- NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ);
- else
- NCR5380_write(DTC_CONTROL_REG, CSR_DIR_READ | CSR_INT_BASE);
- NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
- rtrc(1);
- while (len > 0) {
- rtrc(2);
- while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
- ++i;
- rtrc(3);
- memcpy_fromio(d, hostdata->base + DTC_DATA_BUF, 128);
- d += 128;
- len -= 128;
- rtrc(7);
- /*** with int's on, it sometimes hangs after here.
- * Looks like something makes HBNR go away. */
- }
- rtrc(4);
- while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
- ++i;
- rtrc(0);
- return (0);
-}
-
-/****************************************************************
- * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
- * unsigned char *src, int len)
- *
- * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
- * src
- *
- * Inputs : src = source, len = length in bytes
- *
- * Returns : 0 on success, non zero on a failure such as a watchdog
- * timeout.
-*/
-
-static inline int dtc_pwrite(struct Scsi_Host *instance,
- unsigned char *src, int len)
-{
- int i;
- struct NCR5380_hostdata *hostdata = shost_priv(instance);
-
- if (instance->irq == NO_IRQ)
- NCR5380_write(DTC_CONTROL_REG, 0);
- else
- NCR5380_write(DTC_CONTROL_REG, CSR_5380_INTR);
- NCR5380_write(DTC_BLK_CNT, len >> 7); /* Block count */
- for (i = 0; len > 0; ++i) {
- rtrc(5);
- /* Poll until the host buffer can accept data. */
- while (NCR5380_read(DTC_CONTROL_REG) & CSR_HOST_BUF_NOT_RDY)
- ++i;
- rtrc(3);
- memcpy_toio(hostdata->base + DTC_DATA_BUF, src, 128);
- src += 128;
- len -= 128;
- }
- rtrc(4);
- while (!(NCR5380_read(DTC_CONTROL_REG) & D_CR_ACCESS))
- ++i;
- rtrc(6);
- /* Wait until the last byte has been sent to the disk */
- while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT))
- ++i;
- rtrc(7);
- /* Check for parity error here. fixme. */
- rtrc(0);
- return (0);
-}
-
-static int dtc_dma_xfer_len(struct scsi_cmnd *cmd)
-{
- int transfersize = cmd->transfersize;
-
- /* Limit transfers to 32K, for xx400 & xx406
- * pseudoDMA that transfers in 128 bytes blocks.
- */
- if (transfersize > 32 * 1024 && cmd->SCp.this_residual &&
- !(cmd->SCp.this_residual % transfersize))
- transfersize = 32 * 1024;
-
- return transfersize;
-}
-
-MODULE_LICENSE("GPL");
-
-#include "NCR5380.c"
-
-static int dtc_release(struct Scsi_Host *shost)
-{
- struct NCR5380_hostdata *hostdata = shost_priv(shost);
-
- if (shost->irq != NO_IRQ)
- free_irq(shost->irq, shost);
- NCR5380_exit(shost);
- scsi_unregister(shost);
- iounmap(hostdata->base);
- return 0;
-}
-
-static struct scsi_host_template driver_template = {
- .name = "DTC 3180/3280",
- .detect = dtc_detect,
- .release = dtc_release,
- .proc_name = "dtc3x80",
- .info = dtc_info,
- .queuecommand = dtc_queue_command,
- .eh_abort_handler = dtc_abort,
- .eh_bus_reset_handler = dtc_bus_reset,
- .bios_param = dtc_biosparam,
- .can_queue = 32,
- .this_id = 7,
- .sg_tablesize = SG_ALL,
- .cmd_per_lun = 2,
- .use_clustering = DISABLE_CLUSTERING,
- .cmd_size = NCR5380_CMD_SIZE,
- .max_sectors = 128,
-};
-#include "scsi_module.c"
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff