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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vpac270-pcmcia.c (3331B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * linux/drivers/pcmcia/pxa2xx_vpac270.c
      4 *
      5 * Driver for Voipac PXA270 PCMCIA and CF sockets
      6 *
      7 * Copyright (C) 2010-2011 Marek Vasut <marek.vasut@gmail.com>
      8 */
      9
     10#include <linux/gpio.h>
     11#include <linux/module.h>
     12#include <linux/platform_device.h>
     13
     14#include <asm/mach-types.h>
     15
     16#include "vpac270.h"
     17
     18#include <pcmcia/soc_common.h>
     19
     20static struct gpio vpac270_pcmcia_gpios[] = {
     21	{ GPIO107_VPAC270_PCMCIA_PPEN,	GPIOF_INIT_LOW,	"PCMCIA PPEN" },
     22	{ GPIO11_VPAC270_PCMCIA_RESET,	GPIOF_INIT_LOW,	"PCMCIA Reset" },
     23};
     24
     25static struct gpio vpac270_cf_gpios[] = {
     26	{ GPIO16_VPAC270_CF_RESET,	GPIOF_INIT_LOW,	"CF Reset" },
     27};
     28
     29static int vpac270_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
     30{
     31	int ret;
     32
     33	if (skt->nr == 0) {
     34		ret = gpio_request_array(vpac270_pcmcia_gpios,
     35				ARRAY_SIZE(vpac270_pcmcia_gpios));
     36
     37		skt->stat[SOC_STAT_CD].gpio = GPIO84_VPAC270_PCMCIA_CD;
     38		skt->stat[SOC_STAT_CD].name = "PCMCIA CD";
     39		skt->stat[SOC_STAT_RDY].gpio = GPIO35_VPAC270_PCMCIA_RDY;
     40		skt->stat[SOC_STAT_RDY].name = "PCMCIA Ready";
     41	} else {
     42		ret = gpio_request_array(vpac270_cf_gpios,
     43				ARRAY_SIZE(vpac270_cf_gpios));
     44
     45		skt->stat[SOC_STAT_CD].gpio = GPIO17_VPAC270_CF_CD;
     46		skt->stat[SOC_STAT_CD].name = "CF CD";
     47		skt->stat[SOC_STAT_RDY].gpio = GPIO12_VPAC270_CF_RDY;
     48		skt->stat[SOC_STAT_RDY].name = "CF Ready";
     49	}
     50
     51	return ret;
     52}
     53
     54static void vpac270_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
     55{
     56	if (skt->nr == 0)
     57		gpio_free_array(vpac270_pcmcia_gpios,
     58					ARRAY_SIZE(vpac270_pcmcia_gpios));
     59	else
     60		gpio_free_array(vpac270_cf_gpios,
     61					ARRAY_SIZE(vpac270_cf_gpios));
     62}
     63
     64static void vpac270_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
     65					struct pcmcia_state *state)
     66{
     67	state->vs_3v  = 1;
     68	state->vs_Xv  = 0;
     69}
     70
     71static int
     72vpac270_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
     73				const socket_state_t *state)
     74{
     75	if (skt->nr == 0) {
     76		gpio_set_value(GPIO11_VPAC270_PCMCIA_RESET,
     77			(state->flags & SS_RESET));
     78		gpio_set_value(GPIO107_VPAC270_PCMCIA_PPEN,
     79			!(state->Vcc == 33 || state->Vcc == 50));
     80	} else {
     81		gpio_set_value(GPIO16_VPAC270_CF_RESET,
     82			(state->flags & SS_RESET));
     83	}
     84
     85	return 0;
     86}
     87
     88static struct pcmcia_low_level vpac270_pcmcia_ops = {
     89	.owner			= THIS_MODULE,
     90
     91	.first			= 0,
     92	.nr			= 2,
     93
     94	.hw_init		= vpac270_pcmcia_hw_init,
     95	.hw_shutdown		= vpac270_pcmcia_hw_shutdown,
     96
     97	.socket_state		= vpac270_pcmcia_socket_state,
     98	.configure_socket	= vpac270_pcmcia_configure_socket,
     99};
    100
    101static struct platform_device *vpac270_pcmcia_device;
    102
    103static int __init vpac270_pcmcia_init(void)
    104{
    105	int ret;
    106
    107	if (!machine_is_vpac270())
    108		return -ENODEV;
    109
    110	vpac270_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
    111	if (!vpac270_pcmcia_device)
    112		return -ENOMEM;
    113
    114	ret = platform_device_add_data(vpac270_pcmcia_device,
    115		&vpac270_pcmcia_ops, sizeof(vpac270_pcmcia_ops));
    116
    117	if (!ret)
    118		ret = platform_device_add(vpac270_pcmcia_device);
    119
    120	if (ret)
    121		platform_device_put(vpac270_pcmcia_device);
    122
    123	return ret;
    124}
    125
    126static void __exit vpac270_pcmcia_exit(void)
    127{
    128	platform_device_unregister(vpac270_pcmcia_device);
    129}
    130
    131module_init(vpac270_pcmcia_init);
    132module_exit(vpac270_pcmcia_exit);
    133
    134MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
    135MODULE_DESCRIPTION("PCMCIA support for Voipac PXA270");
    136MODULE_ALIAS("platform:pxa2xx-pcmcia");
    137MODULE_LICENSE("GPL");