pxa2xx_mainstone.c

/*
 * linux/drivers/pcmcia/pxa2xx_mainstone.c
 *
 * Mainstone PCMCIA specific routines.
 *
 * Created:	May 12, 2004
 * Author:	Nicolas Pitre
 * Copyright:	MontaVista Software Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

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

#include <pcmcia/ss.h>

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

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

#include "soc_common.h"


static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	/*
	 * Setup default state of GPIO outputs
	 * before we enable them as outputs.
	 */
	if (skt->nr == 0) {
		skt->socket.pci_irq = MAINSTONE_S0_IRQ;
		skt->stat[SOC_STAT_CD].irq = MAINSTONE_S0_CD_IRQ;
		skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
		skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S0_STSCHG_IRQ;
		skt->stat[SOC_STAT_BVD1].name = "PCMCIA0 STSCHG";
	} else {
		skt->socket.pci_irq = MAINSTONE_S1_IRQ;
		skt->stat[SOC_STAT_CD].irq = MAINSTONE_S1_CD_IRQ;
		skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
		skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S1_STSCHG_IRQ;
		skt->stat[SOC_STAT_BVD1].name = "PCMCIA1 STSCHG";
	}
	return 0;
}

static unsigned long mst_pcmcia_status[2];

static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				    struct pcmcia_state *state)
{
	unsigned long status, flip;

	status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
	flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;

	/*
	 * Workaround for STSCHG which can't be deasserted:
	 * We therefore disable/enable corresponding IRQs
	 * as needed to avoid IRQ locks.
	 */
	if (flip) {