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 | |
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 | #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(offset: address, size: 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(addr: 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 | |
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 | |