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1// SPDX-License-Identifier: GPL-2.02/*3 * linux/drivers/serial/acorn.c4 *5 * Copyright (C) 1996-2003 Russell King.6 */7#include <linux/module.h>8#include <linux/types.h>9#include <linux/tty.h>10#include <linux/serial_core.h>11#include <linux/errno.h>12#include <linux/ioport.h>13#include <linux/slab.h>14#include <linux/device.h>15#include <linux/init.h>16 17#include <asm/io.h>18#include <asm/ecard.h>19#include <asm/string.h>20 21#include "8250.h"22 23#define MAX_PORTS 324 25struct serial_card_type {26 unsigned int num_ports;27 unsigned int uartclk;28 unsigned int type;29 unsigned int offset[MAX_PORTS];30};31 32struct serial_card_info {33 unsigned int num_ports;34 int ports[MAX_PORTS];35 void __iomem *vaddr;36};37 38static int39serial_card_probe(struct expansion_card *ec, const struct ecard_id *id)40{41 struct serial_card_info *info;42 struct serial_card_type *type = id->data;43 struct uart_8250_port uart;44 unsigned long bus_addr;45 unsigned int i;46 47 info = kzalloc(sizeof(struct serial_card_info), GFP_KERNEL);48 if (!info)49 return -ENOMEM;50 51 info->num_ports = type->num_ports;52 53 bus_addr = ecard_resource_start(ec, type->type);54 info->vaddr = ecardm_iomap(ec, type->type, 0, 0);55 if (!info->vaddr) {56 kfree(info);57 return -ENOMEM;58 }59 60 ecard_set_drvdata(ec, info);61 62 memset(&uart, 0, sizeof(struct uart_8250_port));63 uart.port.irq = ec->irq;64 uart.port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;65 uart.port.uartclk = type->uartclk;66 uart.port.iotype = UPIO_MEM;67 uart.port.regshift = 2;68 uart.port.dev = &ec->dev;69 70 for (i = 0; i < info->num_ports; i++) {71 uart.port.membase = info->vaddr + type->offset[i];72 uart.port.mapbase = bus_addr + type->offset[i];73 74 info->ports[i] = serial8250_register_8250_port(&uart);75 }76 77 return 0;78}79 80static void serial_card_remove(struct expansion_card *ec)81{82 struct serial_card_info *info = ecard_get_drvdata(ec);83 int i;84 85 ecard_set_drvdata(ec, NULL);86 87 for (i = 0; i < info->num_ports; i++)88 if (info->ports[i] > 0)89 serial8250_unregister_port(info->ports[i]);90 91 kfree(info);92}93 94static struct serial_card_type atomwide_type = {95 .num_ports = 3,96 .uartclk = 7372800,97 .type = ECARD_RES_IOCSLOW,98 .offset = { 0x2800, 0x2400, 0x2000 },99};100 101static struct serial_card_type serport_type = {102 .num_ports = 2,103 .uartclk = 3686400,104 .type = ECARD_RES_IOCSLOW,105 .offset = { 0x2000, 0x2020 },106};107 108static const struct ecard_id serial_cids[] = {109 { MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, &atomwide_type },110 { MANU_SERPORT, PROD_SERPORT_DSPORT, &serport_type },111 { 0xffff, 0xffff }112};113 114static struct ecard_driver serial_card_driver = {115 .probe = serial_card_probe,116 .remove = serial_card_remove,117 .id_table = serial_cids,118 .drv = {119 .name = "8250_acorn",120 },121};122 123static int __init serial_card_init(void)124{125 return ecard_register_driver(&serial_card_driver);126}127 128static void __exit serial_card_exit(void)129{130 ecard_remove_driver(&serial_card_driver);131}132 133MODULE_AUTHOR("Russell King");134MODULE_DESCRIPTION("Acorn 8250-compatible serial port expansion card driver");135MODULE_LICENSE("GPL");136 137module_init(serial_card_init);138module_exit(serial_card_exit);139