8250_gsc.c

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/*
 *  Serial Device Initialisation for Lasi/Asp/Wax/Dino
 *
 *  (c) Copyright Matthew Wilcox <[email protected]> 2001-2002
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *      the Free Software Foundation; either version 2 of the License, or
 *      (at your option) any later version.
 */

#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/serial_core.h>
#include <linux/signal.h>
#include <linux/types.h>

#include <asm/hardware.h>
#include <asm/parisc-device.h>
#include <asm/io.h>

#include "8250.h"

static int __init serial_init_chip(struct parisc_device *dev)
{
    struct uart_8250_port uart;
    unsigned long address;
    int err;

    if (!dev->irq) {
        /* We find some unattached serial ports by walking native
         * busses.  These should be silently ignored.  Otherwise,
         * what we have here is a missing parent device, so tell
         * the user what they're missing.
         */
        if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
            printk(KERN_INFO
                "Serial: device 0x%llx not configured.\n"
                "Enable support for Wax, Lasi, Asp or Dino.\n",
                (unsigned long long)dev->hpa.start);
        return -ENODEV;
    }

    address = dev->hpa.start;
    if (dev->id.sversion != 0x8d)
        address += 0x800;

    memset(&uart, 0, sizeof(uart));
    uart.port.iotype    = UPIO_MEM;
    /* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
    uart.port.uartclk   = 7272727;
    uart.port.mapbase   = address;
    uart.port.membase   = ioremap_nocache(address, 16);
    uart.port.irq   = dev->irq;
    uart.port.flags = UPF_BOOT_AUTOCONF;
    uart.port.dev   = &dev->dev;

    err = serial8250_register_8250_port(&uart);
    if (err < 0) {
        printk(KERN_WARNING
            "serial8250_register_8250_port returned error %d\n", err);
        iounmap(uart.port.membase);
        return err;
    }

    return 0;
}

static struct parisc_device_id serial_tbl[] = {
    { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
    { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
    { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
    { 0 }
};

/* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
 * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
 * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
 * which only knows about Lasi and then a second which will find all the
 * other serial ports.  HPUX ignores this problem.
 */
static struct parisc_device_id lasi_tbl[] = {
    { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
    { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
    { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
    { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
    { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
    { HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
    { HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
    { HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
    { HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
    { 0 }
};


MODULE_DEVICE_TABLE(parisc, serial_tbl);

static struct parisc_driver lasi_driver = {
    .name       = "serial_1",
    .id_table   = lasi_tbl,
    .probe      = serial_init_chip,
};

static struct parisc_driver serial_driver = {
    .name       = "serial",
    .id_table   = serial_tbl,
    .probe      = serial_init_chip,
};

static int __init probe_serial_gsc(void)
{
    register_parisc_driver(&lasi_driver);
    register_parisc_driver(&serial_driver);
    return 0;
}

module_init(probe_serial_gsc);

MODULE_LICENSE("GPL");