LXR linux/drivers/tty/serial/8250/8250

   1/*
   2 *      Serial Device Initialisation for Lasi/Asp/Wax/Dino
   3 *
   4 *      (c) Copyright Matthew Wilcox <willy@debian.org> 2001-2002
   5 *
   6 *      This program is free software; you can redistribute it and/or modify
   7 *      it under the terms of the GNU General Public License as published by
   8 *      the Free Software Foundation; either version 2 of the License, or
   9 *      (at your option) any later version.
  10 */
  11
  12#include <linux/errno.h>
  13#include <linux/init.h>
  14#include <linux/interrupt.h>
  15#include <linux/ioport.h>
  16#include <linux/module.h>
  17#include <linux/serial_core.h>
  18#include <linux/signal.h>
  19#include <linux/types.h>
  20
  21#include <asm/hardware.h>
  22#include <asm/parisc-device.h>
  23#include <asm/io.h>
  24
  25#include "8250.h"
  26
  27static int __init serial_init_chip(struct parisc_device *dev)
  28{
  29        struct uart_8250_port uart;
  30        unsigned long address;
  31        int err;
  32
  33#ifdef CONFIG_64BIT
  34        if (!dev->irq && (dev->id.sversion == 0xad))
  35                dev->irq = iosapic_serial_irq(dev);
  36#endif
  37
  38        if (!dev->irq) {
  39                /* We find some unattached serial ports by walking native
  40                 * busses.  These should be silently ignored.  Otherwise,
  41                 * what we have here is a missing parent device, so tell
  42                 * the user what they're missing.
  43                 */
  44                if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
  45                        printk(KERN_INFO
  46                                "Serial: device 0x%llx not configured.\n"
  47                                "Enable support for Wax, Lasi, Asp or Dino.\n",
  48                                (unsigned long long)dev->hpa.start);
  49                return -ENODEV;
  50        }
  51
  52        address = dev->hpa.start;
  53        if (dev->id.sversion != 0x8d)
  54                address += 0x800;
  55
  56        memset(&uart, 0, sizeof(uart));
  57        uart.port.iotype        = UPIO_MEM;
  58        /* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
  59        uart.port.uartclk       = (dev->id.sversion != 0xad) ?
  60                                        7272727 : 1843200;
  61        uart.port.mapbase       = address;
  62        uart.port.membase       = ioremap_nocache(address, 16);
  63        uart.port.irq   = dev->irq;
  64        uart.port.flags = UPF_BOOT_AUTOCONF;
  65        uart.port.dev   = &dev->dev;
  66
  67        err = serial8250_register_8250_port(&uart);
  68        if (err < 0) {
  69                printk(KERN_WARNING
  70                        "serial8250_register_8250_port returned error %d\n", err);
  71                iounmap(uart.port.membase);
  72                return err;
  73        }
  74
  75        return 0;
  76}
  77
  78static struct parisc_device_id serial_tbl[] = {
  79        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
  80        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
  81        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
  82        { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x000ad },
  83        { 0 }
  84};
  85
  86/* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
  87 * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
  88 * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
  89 * which only knows about Lasi and then a second which will find all the
  90 * other serial ports.  HPUX ignores this problem.
  91 */
  92static struct parisc_device_id lasi_tbl[] = {
  93        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
  94        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
  95        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
  96        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
  97        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
  98        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
  99        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
 100        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
 101        { HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
 102        { 0 }
 103};
 104
 105
 106MODULE_DEVICE_TABLE(parisc, serial_tbl);
 107
 108static struct parisc_driver lasi_driver = {
 109        .name           = "serial_1",
 110        .id_table       = lasi_tbl,
 111        .probe          = serial_init_chip,
 112};
 113
 114static struct parisc_driver serial_driver = {
 115        .name           = "serial",
 116        .id_table       = serial_tbl,
 117        .probe          = serial_init_chip,
 118};
 119
 120static int __init probe_serial_gsc(void)
 121{
 122        register_parisc_driver(&lasi_driver);
 123        register_parisc_driver(&serial_driver);
 124        return 0;
 125}
 126
 127module_init(probe_serial_gsc);
 128
 129MODULE_LICENSE("GPL");
 130