drivers/serial/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.h>
  18 #include <linux/signal.h>
  19 #include <linux/slab.h>
  20 #include <linux/types.h>
  21
  22 #include <asm/hardware.h>
  23 #include <asm/parisc-device.h>
  24 #include <asm/io.h>
  25 #include <asm/serial.h>
  26
  27 static void setup_parisc_serial(struct serial_struct *serial,
  28                 unsigned long address, int irq, int line)
  29 {
  30         memset(serial, 0, sizeof(struct serial_struct));
  31
  32         /* autoconfig() sets state->type.  This sets info->type */
  33         serial->type = PORT_16550A;
  34
  35         serial->line = line;
  36         serial->iomap_base = address;
  37         serial->iomem_base = ioremap(address, 0x8);
  38
  39         serial->irq = irq;
  40         serial->io_type = SERIAL_IO_MEM;        /* define access method */
  41         serial->flags = 0;
  42         serial->xmit_fifo_size = 16;
  43         serial->custom_divisor = 0;
  44         serial->baud_base = LASI_BASE_BAUD;
  45 }
  46
  47 static int __init
  48 serial_init_chip(struct parisc_device *dev)
  49 {
  50         static int serial_line_nr;
  51         unsigned long address;
  52         int err;
  53
  54         struct serial_struct *serial;
  55
  56         if (!dev->irq) {
  57                 /* We find some unattached serial ports by walking native
  58                  * busses.  These should be silently ignored.  Otherwise,
  59                  * what we have here is a missing parent device, so tell
  60                  * the user what they're missing.
  61                  */
  62                 if (dev->parent->id.hw_type != HPHW_IOA) {
  63                         printk(KERN_INFO "Serial: device 0x%lx not configured.\n"
  64                                 "Enable support for Wax, Lasi, Asp or Dino.\n", dev->hpa);
  65                 }
  66                 return -ENODEV;
  67         }
  68
  69         serial = kmalloc(sizeof(*serial), GFP_KERNEL);
  70         if (!serial)
  71                 return -ENOMEM;
  72
  73         address = dev->hpa;
  74         if (dev->id.sversion != 0x8d) {
  75                 address += 0x800;
  76         }
  77
  78         setup_parisc_serial(serial, address, dev->irq, serial_line_nr++);
  79         err = register_serial(serial);
  80         if (err < 0) {
  81                 printk(KERN_WARNING "register_serial returned error %d\n", err);
  82                 kfree(serial);
  83                 return -ENODEV;
  84         }
  85
  86         return 0;
  87 }
  88
  89 static struct parisc_device_id serial_tbl[] = {
  90         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
  91         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
  92         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
  93         { 0 }
  94 };
  95
  96 /* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
  97  * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
  98  * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
  99  * which only knows about Lasi and then a second which will find all the
 100  * other serial ports.  HPUX ignores this problem.
 101  */
 102 static struct parisc_device_id lasi_tbl[] = {
 103         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
 104         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
 105         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
 106         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
 107         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
 108         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
 109         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
 110         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
 111         { HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
 112         { 0 }
 113 };
 114
 115
 116 MODULE_DEVICE_TABLE(parisc, serial_tbl);
 117
 118 static struct parisc_driver lasi_driver = {
 119         .name           = "Lasi RS232",
 120         .id_table       = lasi_tbl,
 121         .probe          = serial_init_chip,
 122 };
 123
 124 static struct parisc_driver serial_driver = {
 125         .name           = "Serial RS232",
 126         .id_table       = serial_tbl,
 127         .probe          = serial_init_chip,
 128 };
 129
 130 int __init probe_serial_gsc(void)
 131 {
 132         register_parisc_driver(&lasi_driver);
 133         register_parisc_driver(&serial_driver);
 134         return 0;
 135 }
 136
 137 module_init(probe_serial_gsc);