// SPDX-License-Identifier: GPL-2.0-only
/*
 * linux/drivers/pcmcia/pxa2xx_trizeps4.c
 *
 * TRIZEPS PCMCIA specific routines.
 *
 * Author:      Jürgen Schindele
 * Created:     20 02, 2006
 * Copyright:   Jürgen Schindele
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

#include <asm/mach-types.h>
#include <asm/irq.h>

#include <mach/pxa2xx-regs.h>
#include <mach/trizeps4.h>

#include "soc_common.h"

extern void board_pcmcia_power(int power);

static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
        /* we dont have voltage/card/ready detection
         * so we dont need interrupts for it
         */
        switch (skt->nr) {
        case 0:
                skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
                skt->stat[SOC_STAT_CD].name = "cs0_cd";
                skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
                skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
                break;
        default:
                break;
        }
        /* release the reset of this card */
        pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);

        return 0;
}

static unsigned long trizeps_pcmcia_status[2];

static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
                                struct pcmcia_state *state)
{
        unsigned short status = 0, change;
        status = CFSR_readw();
        change = (status ^ trizeps_pcmcia_status[skt->nr]) &
                                ConXS_CFSR_BVD_MASK;
        if (change) {
                trizeps_pcmcia_status[skt->nr] = status;
                if (status & ConXS_CFSR_BVD1) {
                        /* enable_irq empty */
                } else {
                        /* disable_irq empty */
                }
        }

        switch (skt->nr) {
        case 0:
                /* just fill in fix states */
                state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
                state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
                state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
                state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
                break;

#ifndef CONFIG_MACH_TRIZEPS_CONXS
        /* on ConXS we only have one slot. Second is inactive */
        case 1:
                state->detect = 0;
                state->ready  = 0;
                state->bvd1   = 0;
                state->bvd2   = 0;
                state->vs_3v  = 0;
                state->vs_Xv  = 0;
                break;

#endif
        }
}

static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
                                const socket_state_t *state)
{
        int ret = 0;
        unsigned short power = 0;

        /* we do nothing here just check a bit */
        switch (state->Vcc) {
        case 0:  power &= 0xfc; break;
        case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
        case 50:
                pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
                break;
        default:
                pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
                ret = -1;
        }

        switch (state->Vpp) {
        case 0:  power &= 0xf3; break;
        case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
        case 120:
                pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
                break;
        default:
                if (state->Vpp != state->Vcc) {
                        pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
                        ret = -1;
                }
        }

        switch (skt->nr) {
        case 0:                  /* we only have 3.3V */
                board_pcmcia_power(power);
                break;

#ifndef CONFIG_MACH_TRIZEPS_CONXS
        /* on ConXS we only have one slot. Second is inactive */
        case 1:
#endif
        default:
                break;
        }

        return ret;
}

static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
{
        /* default is on */
        board_pcmcia_power(0x9);
}

static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
{
        board_pcmcia_power(0x0);
}

static struct pcmcia_low_level trizeps_pcmcia_ops = {
        .owner                  = THIS_MODULE,
        .hw_init                = trizeps_pcmcia_hw_init,
        .socket_state           = trizeps_pcmcia_socket_state,
        .configure_socket       = trizeps_pcmcia_configure_socket,
        .socket_init            = trizeps_pcmcia_socket_init,
        .socket_suspend         = trizeps_pcmcia_socket_suspend,
#ifdef CONFIG_MACH_TRIZEPS_CONXS
        .nr                     = 1,
#else
        .nr                     = 2,
#endif
        .first                  = 0,
};

static struct platform_device *trizeps_pcmcia_device;

static int __init trizeps_pcmcia_init(void)
{
        int ret;

        if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
                return -ENODEV;

        trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
        if (!trizeps_pcmcia_device)
                return -ENOMEM;

        ret = platform_device_add_data(trizeps_pcmcia_device,
                        &trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));

        if (ret == 0)
                ret = platform_device_add(trizeps_pcmcia_device);

        if (ret)
                platform_device_put(trizeps_pcmcia_device);

        return ret;
}

static void __exit trizeps_pcmcia_exit(void)
{
        platform_device_unregister(trizeps_pcmcia_device);
}

fs_initcall(trizeps_pcmcia_init);
module_exit(trizeps_pcmcia_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Juergen Schindele");
MODULE_ALIAS("platform:pxa2xx-pcmcia");