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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Serial Device Initialisation for Lasi/Asp/Wax/Dino4 *5 * (c) Copyright Matthew Wilcox <willy@debian.org> 2001-20026 */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#endif33 34 if (!dev->irq) {35 /* We find some unattached serial ports by walking native36 * busses. These should be silently ignored. Otherwise,37 * what we have here is a missing parent device, so tell38 * 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_188 * attached to Dino. Unfortunately, Dino appears before Lasi in the device89 * tree. To ensure that ttyS0 == SERIAL_0, we register two drivers; one90 * which only knows about Lasi and then a second which will find all the91 * 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_DESCRIPTION("Serial Device Initialisation for Lasi/Asp/Wax/Dino");131MODULE_LICENSE("GPL");132