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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palmld-pcmcia.c (2653B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * linux/drivers/pcmcia/pxa2xx_palmld.c
      4 *
      5 * Driver for Palm LifeDrive PCMCIA
      6 *
      7 * Copyright (C) 2006 Alex Osborne <ato@meshy.org>
      8 * Copyright (C) 2007-2011 Marek Vasut <marek.vasut@gmail.com>
      9 */
     10
     11#include <linux/module.h>
     12#include <linux/platform_device.h>
     13#include <linux/gpio.h>
     14
     15#include <asm/mach-types.h>
     16#include <pcmcia/soc_common.h>
     17
     18#include "palmld.h"
     19
     20static struct gpio palmld_pcmcia_gpios[] = {
     21	{ GPIO_NR_PALMLD_PCMCIA_POWER,	GPIOF_INIT_LOW,	"PCMCIA Power" },
     22	{ GPIO_NR_PALMLD_PCMCIA_RESET,	GPIOF_INIT_HIGH,"PCMCIA Reset" },
     23};
     24
     25static int palmld_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
     26{
     27	int ret;
     28
     29	ret = gpio_request_array(palmld_pcmcia_gpios,
     30				ARRAY_SIZE(palmld_pcmcia_gpios));
     31
     32	skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMLD_PCMCIA_READY;
     33	skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
     34
     35	return ret;
     36}
     37
     38static void palmld_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
     39{
     40	gpio_free_array(palmld_pcmcia_gpios, ARRAY_SIZE(palmld_pcmcia_gpios));
     41}
     42
     43static void palmld_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
     44					struct pcmcia_state *state)
     45{
     46	state->detect = 1; /* always inserted */
     47	state->vs_3v  = 1;
     48	state->vs_Xv  = 0;
     49}
     50
     51static int palmld_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
     52					const socket_state_t *state)
     53{
     54	gpio_set_value(GPIO_NR_PALMLD_PCMCIA_POWER, 1);
     55	gpio_set_value(GPIO_NR_PALMLD_PCMCIA_RESET,
     56			!!(state->flags & SS_RESET));
     57
     58	return 0;
     59}
     60
     61static struct pcmcia_low_level palmld_pcmcia_ops = {
     62	.owner			= THIS_MODULE,
     63
     64	.first			= 1,
     65	.nr			= 1,
     66
     67	.hw_init		= palmld_pcmcia_hw_init,
     68	.hw_shutdown		= palmld_pcmcia_hw_shutdown,
     69
     70	.socket_state		= palmld_pcmcia_socket_state,
     71	.configure_socket	= palmld_pcmcia_configure_socket,
     72};
     73
     74static struct platform_device *palmld_pcmcia_device;
     75
     76static int __init palmld_pcmcia_init(void)
     77{
     78	int ret;
     79
     80	if (!machine_is_palmld())
     81		return -ENODEV;
     82
     83	palmld_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
     84	if (!palmld_pcmcia_device)
     85		return -ENOMEM;
     86
     87	ret = platform_device_add_data(palmld_pcmcia_device, &palmld_pcmcia_ops,
     88					sizeof(palmld_pcmcia_ops));
     89
     90	if (!ret)
     91		ret = platform_device_add(palmld_pcmcia_device);
     92
     93	if (ret)
     94		platform_device_put(palmld_pcmcia_device);
     95
     96	return ret;
     97}
     98
     99static void __exit palmld_pcmcia_exit(void)
    100{
    101	platform_device_unregister(palmld_pcmcia_device);
    102}
    103
    104module_init(palmld_pcmcia_init);
    105module_exit(palmld_pcmcia_exit);
    106
    107MODULE_AUTHOR("Alex Osborne <ato@meshy.org>,"
    108	    " Marek Vasut <marek.vasut@gmail.com>");
    109MODULE_DESCRIPTION("PCMCIA support for Palm LifeDrive");
    110MODULE_ALIAS("platform:pxa2xx-pcmcia");
    111MODULE_LICENSE("GPL");