linux-imx

/*

 *  Driver for Adaptec AHA-1542 SCSI host adapters

 *

 *  Copyright (C) 1992  Tommy Thorn

 *  Copyright (C) 1993, 1994, 1995 Eric Youngdale

 *  Copyright (C) 2015 Ondrej Zary

 */

​

#include <linux/module.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/string.h>

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/spinlock.h>

#include <linux/isa.h>

#include <linux/pnp.h>

#include <linux/slab.h>

#include <linux/io.h>

#include <asm/dma.h>

#include <scsi/scsi_cmnd.h>

#include <scsi/scsi_device.h>

#include <scsi/scsi_host.h>

#include "aha1542.h"

​

#define MAXBOARDS 4

​

static bool isapnp = 1;

module_param(isapnp, bool, 0);

MODULE_PARM_DESC(isapnp, "enable PnP support (default=1)");

​

static int io[MAXBOARDS] = { 0x330, 0x334, 0, 0 };

module_param_hw_array(io, int, ioport, NULL, 0);

MODULE_PARM_DESC(io, "base IO address of controller (0x130,0x134,0x230,0x234,0x330,0x334, default=0x330,0x334)");

​

/* time AHA spends on the AT-bus during data transfer */

static int bus_on[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 11us */

module_param_array(bus_on, int, NULL, 0);

MODULE_PARM_DESC(bus_on, "bus on time [us] (2-15, default=-1 [HW default: 11])");

​

/* time AHA spends off the bus (not to monopolize it) during data transfer  */

static int bus_off[MAXBOARDS] = { -1, -1, -1, -1 }; /* power-on default: 4us */

module_param_array(bus_off, int, NULL, 0);

MODULE_PARM_DESC(bus_off, "bus off time [us] (1-64, default=-1 [HW default: 4])");

​

/* default is jumper selected (J1 on 1542A), factory default = 5 MB/s */

static int dma_speed[MAXBOARDS] = { -1, -1, -1, -1 };

module_param_array(dma_speed, int, NULL, 0);

MODULE_PARM_DESC(dma_speed, "DMA speed [MB/s] (5,6,7,8,10, default=-1 [by jumper])");

​

#define BIOS_TRANSLATION_6432 1 /* Default case these days */

#define BIOS_TRANSLATION_25563 2    /* Big disk case */

​

struct aha1542_hostdata {

    /* This will effectively start both of them at the first mailbox */

    int bios_translation;   /* Mapping bios uses - for compatibility */

    int aha1542_last_mbi_used;

    int aha1542_last_mbo_used;

    struct scsi_cmnd *int_cmds[AHA1542_MAILBOXES];

    struct mailbox *mb;

    dma_addr_t mb_handle;

    struct ccb *ccb;

    dma_addr_t ccb_handle;

};

​

struct aha1542_cmd {

    struct chain *chain;

    dma_addr_t chain_handle;

};

​

static inline void aha1542_intr_reset(u16 base)

{

    outb(IRST, CONTROL(base));

}

​

static inline bool wait_mask(u16 port, u8 mask, u8 allof, u8 noneof, int timeout)

{

    bool delayed = true;

​

    if (timeout == 0) {

        timeout = 3000000;

        delayed = false;

    }

​

    while (1) {

        u8 bits = inb(port) & mask;

        if ((bits & allof) == allof && ((bits & noneof) == 0))

            break;

        if (delayed)

            mdelay(1);

        if (--timeout == 0)