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_port port;
 30	unsigned long address;
 31	int err;
 32
 33	if (!dev->irq) {
 34		/* We find some unattached serial ports by walking native
 35		 * busses.  These should be silently ignored.  Otherwise,
 36		 * what we have here is a missing parent device, so tell
 37		 * the user what they're missing.
 38		 */
 39		if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
 40			printk(KERN_INFO
 41				"Serial: device 0x%llx not configured.\n"
 42				"Enable support for Wax, Lasi, Asp or Dino.\n",
 43				(unsigned long long)dev->hpa.start);
 44		return -ENODEV;
 45	}
 46
 47	address = dev->hpa.start;
 48	if (dev->id.sversion != 0x8d)
 49		address += 0x800;
 50
 51	memset(&port, 0, sizeof(port));
 52	port.iotype	= UPIO_MEM;
 53	/* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
 54	port.uartclk	= 7272727;
 55	port.mapbase	= address;
 56	port.membase	= ioremap_nocache(address, 16);
 57	port.irq	= dev->irq;
 58	port.flags	= UPF_BOOT_AUTOCONF;
 59	port.dev	= &dev->dev;
 60
 61	err = serial8250_register_port(&port);
 62	if (err < 0) {
 63		printk(KERN_WARNING
 64			"serial8250_register_port returned error %d\n", err);
 65		iounmap(port.membase);
 66		return err;
 67	}
 68
 69	return 0;
 70}
 71
 72static struct parisc_device_id serial_tbl[] = {
 73	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00075 },
 74	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008c },
 75	{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0008d },
 76	{ 0 }
 77};
 78
 79/* Hack.  Some machines have SERIAL_0 attached to Lasi and SERIAL_1
 80 * attached to Dino.  Unfortunately, Dino appears before Lasi in the device
 81 * tree.  To ensure that ttyS0 == SERIAL_0, we register two drivers; one
 82 * which only knows about Lasi and then a second which will find all the
 83 * other serial ports.  HPUX ignores this problem.
 84 */
 85static struct parisc_device_id lasi_tbl[] = {
 86	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03B, 0x0008C }, /* C1xx/C1xxL */
 87	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03C, 0x0008C }, /* B132L */
 88	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03D, 0x0008C }, /* B160L */
 89	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03E, 0x0008C }, /* B132L+ */
 90	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x03F, 0x0008C }, /* B180L+ */
 91	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x046, 0x0008C }, /* Rocky2 120 */
 92	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x047, 0x0008C }, /* Rocky2 150 */
 93	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x04E, 0x0008C }, /* Kiji L2 132 */
 94	{ HPHW_FIO, HVERSION_REV_ANY_ID, 0x056, 0x0008C }, /* Raven+ */
 95	{ 0 }
 96};
 97
 98
 99MODULE_DEVICE_TABLE(parisc, serial_tbl);
100
101static struct parisc_driver lasi_driver = {
102	.name		= "serial_1",
103	.id_table	= lasi_tbl,
104	.probe		= serial_init_chip,
105};
106
107static struct parisc_driver serial_driver = {
108	.name		= "serial",
109	.id_table	= serial_tbl,
110	.probe		= serial_init_chip,
111};
112
113static int __init probe_serial_gsc(void)
114{
115	register_parisc_driver(&lasi_driver);
116	register_parisc_driver(&serial_driver);
117	return 0;
118}
119
120module_init(probe_serial_gsc);
121
122MODULE_LICENSE("GPL");