drivers/tty/serial/8250/8250_gsc.c

   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
  27 static 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         extern int iosapic_serial_irq(int cellnum);
  35         if (!dev->irq && (dev->id.sversion == 0xad))
  36                 dev->irq = iosapic_serial_irq(dev->mod_index-1);
  37 #endif
  38
  39         if (!dev->irq) {
  40                 /* We find some unattached serial ports by walking native
  41                  * busses.  These should be silently ignored.  Otherwise,
  42                  * what we have here is a missing parent device, so tell
  43                  * the user what they're missing.
  44                  */
  45                 if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
  46                         printk(KERN_INFO
  47                                 "Serial: device 0x%llx not configured.\n"
  48                                 "Enable support for Wax, Lasi, Asp or Dino.\n",
  49                                 (unsigned long long)dev->hpa.start);
  50                 return -ENODEV;
  51         }
  52
  53         address = dev->hpa.start;
  54         if (dev->id.sversion != 0x8d)
  55                 address += 0x800;
  56
  57         memset(&uart, 0, sizeof(uart));
  58         uart.port.iotype        = UPIO_MEM;
  59         /* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
  60         uart.port.uartclk       = (dev->id.sversion != 0xad) ?
  61                                         7272727 : 1843200;
  62         uart.port.mapbase       = address;
  63         uart.port.membase       = ioremap_nocache(address, 16);
  64         uart.port.irq   = dev->irq;
  65         uart.port.flags = UPF_BOOT_AUTOCONF;
  66         uart.port.dev   = &dev->dev;
  67
  68         err = serial8250_register_8250_port(&uart);
  69         if (err < 0) {
  70                 printk(KERN_WARNING
  71                         "serial8250_register_8250_port returned error %d\n", err);
  72                 iounmap(uart.port.membase);
  73                 return err;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static struct parisc_device_id serial_tbl[] = {
  80         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
  81         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
  82         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
  83         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x000ad },
  84         { 0 }
  85 };
  86
  87 /* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
  88  * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
  89  * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
  90  * which only knows about Lasi and then a second which will find all the
  91  * other serial ports.  HPUX ignores this problem.
  92  */
  93 static struct parisc_device_id lasi_tbl[] = {
  94         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
  95         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
  96         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
  97         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
  98         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
  99         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
 100         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
 101         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
 102         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
 103         { 0 }
 104 };
 105
 106
 107 MODULE_DEVICE_TABLE(parisc, serial_tbl);
 108
 109 static struct parisc_driver lasi_driver = {
 110         .name           = "serial_1",
 111         .id_table       = lasi_tbl,
 112         .probe          = serial_init_chip,
 113 };
 114
 115 static struct parisc_driver serial_driver = {
 116         .name           = "serial",
 117         .id_table       = serial_tbl,
 118         .probe          = serial_init_chip,
 119 };
 120
 121 static int __init probe_serial_gsc(void)
 122 {
 123         register_parisc_driver(&lasi_driver);
 124         register_parisc_driver(&serial_driver);
 125         return 0;
 126 }
 127
 128 module_init(probe_serial_gsc);
 129
 130 MODULE_LICENSE("GPL");