1// SPDX-License-Identifier: GPL-2.0+
2/*
3 *	Serial Device Initialisation for Lasi/Asp/Wax/Dino
4 *
5 *	(c) Copyright Matthew Wilcox <willy@debian.org> 2001-2002
6 */
7
8#include <linux/errno.h>
9#include <linux/init.h>
10#include <linux/interrupt.h>
11#include <linux/ioport.h>
12#include <linux/module.h>
13#include <linux/serial_core.h>
14#include <linux/signal.h>
15#include <linux/types.h>
16
17#include <asm/hardware.h>
18#include <asm/parisc-device.h>
19#include <asm/io.h>
20
21#include "8250.h"
22
23static int __init serial_init_chip(struct parisc_device *dev)
24{
25	struct uart_8250_port uart;
26	unsigned long address;
27	int err;
28
29#if defined(CONFIG_64BIT) && defined(CONFIG_IOSAPIC)
30	if (!dev->irq && (dev->id.sversion == 0xad))
31		dev->irq = iosapic_serial_irq(dev);
32#endif
33
34	if (!dev->irq) {
35		/* We find some unattached serial ports by walking native
36		 * busses.  These should be silently ignored.  Otherwise,
37		 * what we have here is a missing parent device, so tell
38		 * the user what they're missing.
39		 */
40		if (parisc_parent(dev)->id.hw_type != HPHW_IOA)
41			dev_info(&dev->dev,
42				"Serial: device 0x%llx not configured.\n"
43				"Enable support for Wax, Lasi, Asp or Dino.\n",
44				(unsigned long long)dev->hpa.start);
45		return -ENODEV;
46	}
47
48	address = dev->hpa.start;
49	if (dev->id.sversion != 0x8d)
50		address += 0x800;
51
52	memset(&uart, 0, sizeof(uart));
53	uart.port.iotype	= UPIO_MEM;
54	/* 7.272727MHz on Lasi.  Assumed the same for Dino, Wax and Timi. */
55	uart.port.uartclk	= (dev->id.sversion != 0xad) ?
56					7272727 : 1843200;
57	uart.port.mapbase	= address;
58	uart.port.membase	= ioremap(address, 16);
59	if (!uart.port.membase) {
60		dev_warn(&dev->dev, "Failed to map memory\n");
61		return -ENOMEM;
62	}
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		dev_warn(&dev->dev,
70			"serial8250_register_8250_port returned error %d\n",
71			err);
72		iounmap(uart.port.membase);
73		return err;
74	}
75
76	return 0;
77}
78
79static const struct parisc_device_id serial_tbl[] __initconst = {
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 */
93static const struct parisc_device_id lasi_tbl[] __initconst = {
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
107MODULE_DEVICE_TABLE(parisc, serial_tbl);
108
109static struct parisc_driver lasi_driver __refdata = {
110	.name		= "serial_1",
111	.id_table	= lasi_tbl,
112	.probe		= serial_init_chip,
113};
114
115static struct parisc_driver serial_driver __refdata = {
116	.name		= "serial",
117	.id_table	= serial_tbl,
118	.probe		= serial_init_chip,
119};
120
121static int __init probe_serial_gsc(void)
122{
123	register_parisc_driver(&lasi_driver);
124	register_parisc_driver(&serial_driver);
125	return 0;
126}
127
128module_init(probe_serial_gsc);
129
130MODULE_LICENSE("GPL");
131