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
serial_init_chip(struct parisc_device * dev)23 static 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 #ifdef CONFIG_64BIT
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_nocache(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
79 static 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 */
93 static 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
107 MODULE_DEVICE_TABLE(parisc, serial_tbl);
108
109 static struct parisc_driver lasi_driver __refdata = {
110 .name = "serial_1",
111 .id_table = lasi_tbl,
112 .probe = serial_init_chip,
113 };
114
115 static struct parisc_driver serial_driver __refdata = {
116 .name = "serial",
117 .id_table = serial_tbl,
118 .probe = serial_init_chip,
119 };
120
probe_serial_gsc(void)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");
131
