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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palmtx-pcmcia.c (2673B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * linux/drivers/pcmcia/pxa2xx_palmtx.c
      4 *
      5 * Driver for Palm T|X PCMCIA
      6 *
      7 * Copyright (C) 2007-2011 Marek Vasut <marek.vasut@gmail.com>
      8 */
      9
     10#include <linux/module.h>
     11#include <linux/platform_device.h>
     12#include <linux/gpio.h>
     13
     14#include <asm/mach-types.h>
     15#include "palmtx.h"
     16#include <pcmcia/soc_common.h>
     17
     18static struct gpio palmtx_pcmcia_gpios[] = {
     19	{ GPIO_NR_PALMTX_PCMCIA_POWER1,	GPIOF_INIT_LOW,	"PCMCIA Power 1" },
     20	{ GPIO_NR_PALMTX_PCMCIA_POWER2,	GPIOF_INIT_LOW,	"PCMCIA Power 2" },
     21	{ GPIO_NR_PALMTX_PCMCIA_RESET,	GPIOF_INIT_HIGH,"PCMCIA Reset" },
     22};
     23
     24static int palmtx_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
     25{
     26	int ret;
     27
     28	ret = gpio_request_array(palmtx_pcmcia_gpios,
     29				ARRAY_SIZE(palmtx_pcmcia_gpios));
     30
     31	skt->stat[SOC_STAT_RDY].gpio = GPIO_NR_PALMTX_PCMCIA_READY;
     32	skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
     33
     34	return ret;
     35}
     36
     37static void palmtx_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
     38{
     39	gpio_free_array(palmtx_pcmcia_gpios, ARRAY_SIZE(palmtx_pcmcia_gpios));
     40}
     41
     42static void palmtx_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
     43					struct pcmcia_state *state)
     44{
     45	state->detect = 1; /* always inserted */
     46	state->vs_3v  = 1;
     47	state->vs_Xv  = 0;
     48}
     49
     50static int
     51palmtx_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
     52				const socket_state_t *state)
     53{
     54	gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER1, 1);
     55	gpio_set_value(GPIO_NR_PALMTX_PCMCIA_POWER2, 1);
     56	gpio_set_value(GPIO_NR_PALMTX_PCMCIA_RESET,
     57			!!(state->flags & SS_RESET));
     58
     59	return 0;
     60}
     61
     62static struct pcmcia_low_level palmtx_pcmcia_ops = {
     63	.owner			= THIS_MODULE,
     64
     65	.first			= 0,
     66	.nr			= 1,
     67
     68	.hw_init		= palmtx_pcmcia_hw_init,
     69	.hw_shutdown		= palmtx_pcmcia_hw_shutdown,
     70
     71	.socket_state		= palmtx_pcmcia_socket_state,
     72	.configure_socket	= palmtx_pcmcia_configure_socket,
     73};
     74
     75static struct platform_device *palmtx_pcmcia_device;
     76
     77static int __init palmtx_pcmcia_init(void)
     78{
     79	int ret;
     80
     81	if (!machine_is_palmtx())
     82		return -ENODEV;
     83
     84	palmtx_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
     85	if (!palmtx_pcmcia_device)
     86		return -ENOMEM;
     87
     88	ret = platform_device_add_data(palmtx_pcmcia_device, &palmtx_pcmcia_ops,
     89					sizeof(palmtx_pcmcia_ops));
     90
     91	if (!ret)
     92		ret = platform_device_add(palmtx_pcmcia_device);
     93
     94	if (ret)
     95		platform_device_put(palmtx_pcmcia_device);
     96
     97	return ret;
     98}
     99
    100static void __exit palmtx_pcmcia_exit(void)
    101{
    102	platform_device_unregister(palmtx_pcmcia_device);
    103}
    104
    105module_init(palmtx_pcmcia_init);
    106module_exit(palmtx_pcmcia_exit);
    107
    108MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
    109MODULE_DESCRIPTION("PCMCIA support for Palm T|X");
    110MODULE_ALIAS("platform:pxa2xx-pcmcia");
    111MODULE_LICENSE("GPL");