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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e740-pcmcia.c (2986B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Toshiba e740 PCMCIA specific routines.
      4 *
      5 * (c) 2004 Ian Molton <spyro@f2s.com>
      6 */
      7
      8#include <linux/init.h>
      9#include <linux/module.h>
     10#include <linux/kernel.h>
     11#include <linux/errno.h>
     12#include <linux/gpio.h>
     13#include <linux/interrupt.h>
     14#include <linux/platform_device.h>
     15
     16#include "eseries-gpio.h"
     17
     18#include <asm/irq.h>
     19#include <asm/mach-types.h>
     20
     21#include <pcmcia/soc_common.h>
     22
     23static int e740_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
     24{
     25	if (skt->nr == 0) {
     26		skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD0;
     27		skt->stat[SOC_STAT_CD].name = "CF card detect";
     28		skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY0;
     29		skt->stat[SOC_STAT_RDY].name = "CF ready";
     30	} else {
     31		skt->stat[SOC_STAT_CD].gpio = GPIO_E740_PCMCIA_CD1;
     32		skt->stat[SOC_STAT_CD].name = "Wifi switch";
     33		skt->stat[SOC_STAT_RDY].gpio = GPIO_E740_PCMCIA_RDY1;
     34		skt->stat[SOC_STAT_RDY].name = "Wifi ready";
     35	}
     36
     37	return 0;
     38}
     39
     40static void e740_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
     41					struct pcmcia_state *state)
     42{
     43	state->vs_3v  = 1;
     44	state->vs_Xv  = 0;
     45}
     46
     47static int e740_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
     48					const socket_state_t *state)
     49{
     50	if (state->flags & SS_RESET) {
     51		if (skt->nr == 0)
     52			gpio_set_value(GPIO_E740_PCMCIA_RST0, 1);
     53		else
     54			gpio_set_value(GPIO_E740_PCMCIA_RST1, 1);
     55	} else {
     56		if (skt->nr == 0)
     57			gpio_set_value(GPIO_E740_PCMCIA_RST0, 0);
     58		else
     59			gpio_set_value(GPIO_E740_PCMCIA_RST1, 0);
     60	}
     61
     62	switch (state->Vcc) {
     63	case 0:	/* Socket off */
     64		if (skt->nr == 0)
     65			gpio_set_value(GPIO_E740_PCMCIA_PWR0, 0);
     66		else
     67			gpio_set_value(GPIO_E740_PCMCIA_PWR1, 1);
     68		break;
     69	case 50:
     70	case 33: /* socket on */
     71		if (skt->nr == 0)
     72			gpio_set_value(GPIO_E740_PCMCIA_PWR0, 1);
     73		else
     74			gpio_set_value(GPIO_E740_PCMCIA_PWR1, 0);
     75		break;
     76	default:
     77		printk(KERN_ERR "e740_cs: Unsupported Vcc: %d\n", state->Vcc);
     78	}
     79
     80	return 0;
     81}
     82
     83static struct pcmcia_low_level e740_pcmcia_ops = {
     84	.owner            = THIS_MODULE,
     85	.hw_init          = e740_pcmcia_hw_init,
     86	.socket_state     = e740_pcmcia_socket_state,
     87	.configure_socket = e740_pcmcia_configure_socket,
     88	.nr               = 2,
     89};
     90
     91static struct platform_device *e740_pcmcia_device;
     92
     93static int __init e740_pcmcia_init(void)
     94{
     95	int ret;
     96
     97	if (!machine_is_e740())
     98		return -ENODEV;
     99
    100	e740_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
    101	if (!e740_pcmcia_device)
    102		return -ENOMEM;
    103
    104	ret = platform_device_add_data(e740_pcmcia_device, &e740_pcmcia_ops,
    105					sizeof(e740_pcmcia_ops));
    106
    107	if (!ret)
    108		ret = platform_device_add(e740_pcmcia_device);
    109
    110	if (ret)
    111		platform_device_put(e740_pcmcia_device);
    112
    113	return ret;
    114}
    115
    116static void __exit e740_pcmcia_exit(void)
    117{
    118	platform_device_unregister(e740_pcmcia_device);
    119}
    120
    121module_init(e740_pcmcia_init);
    122module_exit(e740_pcmcia_exit);
    123
    124MODULE_LICENSE("GPL v2");
    125MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
    126MODULE_ALIAS("platform:pxa2xx-pcmcia");
    127MODULE_DESCRIPTION("e740 PCMCIA platform support");