cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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8250_acorn.c (3061B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 *  linux/drivers/serial/acorn.c
      4 *
      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	3
     24
     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 int
     39serial_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);