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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trizeps4-pcmcia.c (4524B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * linux/drivers/pcmcia/pxa2xx_trizeps4.c
      4 *
      5 * TRIZEPS PCMCIA specific routines.
      6 *
      7 * Author:	Jürgen Schindele
      8 * Created:	20 02, 2006
      9 * Copyright:	Jürgen Schindele
     10 */
     11
     12#include <linux/module.h>
     13#include <linux/init.h>
     14#include <linux/kernel.h>
     15#include <linux/gpio.h>
     16#include <linux/interrupt.h>
     17#include <linux/platform_device.h>
     18
     19#include <asm/mach-types.h>
     20#include <asm/irq.h>
     21
     22#include "pxa2xx-regs.h"
     23#include "trizeps4.h"
     24
     25#include <pcmcia/soc_common.h>
     26
     27extern void board_pcmcia_power(int power);
     28
     29static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
     30{
     31	/* we dont have voltage/card/ready detection
     32	 * so we dont need interrupts for it
     33	 */
     34	switch (skt->nr) {
     35	case 0:
     36		skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
     37		skt->stat[SOC_STAT_CD].name = "cs0_cd";
     38		skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
     39		skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
     40		break;
     41	default:
     42		break;
     43	}
     44	/* release the reset of this card */
     45	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
     46
     47	return 0;
     48}
     49
     50static unsigned long trizeps_pcmcia_status[2];
     51
     52static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
     53				struct pcmcia_state *state)
     54{
     55	unsigned short status = 0, change;
     56	status = CFSR_readw();
     57	change = (status ^ trizeps_pcmcia_status[skt->nr]) &
     58				ConXS_CFSR_BVD_MASK;
     59	if (change) {
     60		trizeps_pcmcia_status[skt->nr] = status;
     61		if (status & ConXS_CFSR_BVD1) {
     62			/* enable_irq empty */
     63		} else {
     64			/* disable_irq empty */
     65		}
     66	}
     67
     68	switch (skt->nr) {
     69	case 0:
     70		/* just fill in fix states */
     71		state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
     72		state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
     73		state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
     74		state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
     75		break;
     76
     77#ifndef CONFIG_MACH_TRIZEPS_CONXS
     78	/* on ConXS we only have one slot. Second is inactive */
     79	case 1:
     80		state->detect = 0;
     81		state->ready  = 0;
     82		state->bvd1   = 0;
     83		state->bvd2   = 0;
     84		state->vs_3v  = 0;
     85		state->vs_Xv  = 0;
     86		break;
     87
     88#endif
     89	}
     90}
     91
     92static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
     93				const socket_state_t *state)
     94{
     95	int ret = 0;
     96	unsigned short power = 0;
     97
     98	/* we do nothing here just check a bit */
     99	switch (state->Vcc) {
    100	case 0:  power &= 0xfc; break;
    101	case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
    102	case 50:
    103		pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
    104		break;
    105	default:
    106		pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
    107		ret = -1;
    108	}
    109
    110	switch (state->Vpp) {
    111	case 0:  power &= 0xf3; break;
    112	case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
    113	case 120:
    114		pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
    115		break;
    116	default:
    117		if (state->Vpp != state->Vcc) {
    118			pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
    119			ret = -1;
    120		}
    121	}
    122
    123	switch (skt->nr) {
    124	case 0:			 /* we only have 3.3V */
    125		board_pcmcia_power(power);
    126		break;
    127
    128#ifndef CONFIG_MACH_TRIZEPS_CONXS
    129	/* on ConXS we only have one slot. Second is inactive */
    130	case 1:
    131#endif
    132	default:
    133		break;
    134	}
    135
    136	return ret;
    137}
    138
    139static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
    140{
    141	/* default is on */
    142	board_pcmcia_power(0x9);
    143}
    144
    145static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
    146{
    147	board_pcmcia_power(0x0);
    148}
    149
    150static struct pcmcia_low_level trizeps_pcmcia_ops = {
    151	.owner			= THIS_MODULE,
    152	.hw_init		= trizeps_pcmcia_hw_init,
    153	.socket_state		= trizeps_pcmcia_socket_state,
    154	.configure_socket	= trizeps_pcmcia_configure_socket,
    155	.socket_init		= trizeps_pcmcia_socket_init,
    156	.socket_suspend		= trizeps_pcmcia_socket_suspend,
    157#ifdef CONFIG_MACH_TRIZEPS_CONXS
    158	.nr			= 1,
    159#else
    160	.nr			= 2,
    161#endif
    162	.first			= 0,
    163};
    164
    165static struct platform_device *trizeps_pcmcia_device;
    166
    167static int __init trizeps_pcmcia_init(void)
    168{
    169	int ret;
    170
    171	if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
    172		return -ENODEV;
    173
    174	trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
    175	if (!trizeps_pcmcia_device)
    176		return -ENOMEM;
    177
    178	ret = platform_device_add_data(trizeps_pcmcia_device,
    179			&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
    180
    181	if (ret == 0)
    182		ret = platform_device_add(trizeps_pcmcia_device);
    183
    184	if (ret)
    185		platform_device_put(trizeps_pcmcia_device);
    186
    187	return ret;
    188}
    189
    190static void __exit trizeps_pcmcia_exit(void)
    191{
    192	platform_device_unregister(trizeps_pcmcia_device);
    193}
    194
    195fs_initcall(trizeps_pcmcia_init);
    196module_exit(trizeps_pcmcia_exit);
    197
    198MODULE_LICENSE("GPL");
    199MODULE_AUTHOR("Juergen Schindele");
    200MODULE_ALIAS("platform:pxa2xx-pcmcia");