sa1111_generic.c

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/*
 * linux/drivers/pcmcia/sa1111_generic.c
 *
 * We implement the generic parts of a SA1111 PCMCIA driver.  This
 * basically means we handle everything except controlling the
 * power.  Power is machine specific...
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/ioport.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/slab.h>

#include <pcmcia/ss.h>

#include <mach/hardware.h>
#include <asm/hardware/sa1111.h>
#include <asm/irq.h>

#include "sa1111_generic.h"

/*
 * These are offsets from the above base.
 */
#define PCCR    0x0000
#define PCSSR   0x0004
#define PCSR    0x0008

#define PCSR_S0_READY   (1<<0)
#define PCSR_S1_READY   (1<<1)
#define PCSR_S0_DETECT  (1<<2)
#define PCSR_S1_DETECT  (1<<3)
#define PCSR_S0_VS1 (1<<4)
#define PCSR_S0_VS2 (1<<5)
#define PCSR_S1_VS1 (1<<6)
#define PCSR_S1_VS2 (1<<7)
#define PCSR_S0_WP  (1<<8)
#define PCSR_S1_WP  (1<<9)
#define PCSR_S0_BVD1    (1<<10)
#define PCSR_S0_BVD2    (1<<11)
#define PCSR_S1_BVD1    (1<<12)
#define PCSR_S1_BVD2    (1<<13)

#define PCCR_S0_RST (1<<0)
#define PCCR_S1_RST (1<<1)
#define PCCR_S0_FLT (1<<2)
#define PCCR_S1_FLT (1<<3)
#define PCCR_S0_PWAITEN (1<<4)
#define PCCR_S1_PWAITEN (1<<5)
#define PCCR_S0_PSE (1<<6)
#define PCCR_S1_PSE (1<<7)

#define PCSSR_S0_SLEEP  (1<<0)
#define PCSSR_S1_SLEEP  (1<<1)

#define IDX_IRQ_S0_READY_NINT   (0)
#define IDX_IRQ_S0_CD_VALID (1)
#define IDX_IRQ_S0_BVD1_STSCHG  (2)
#define IDX_IRQ_S1_READY_NINT   (3)
#define IDX_IRQ_S1_CD_VALID (4)
#define IDX_IRQ_S1_BVD1_STSCHG  (5)

void sa1111_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
{
    struct sa1111_pcmcia_socket *s = to_skt(skt);
    unsigned long status = sa1111_readl(s->dev->mapbase + PCSR);

    switch (skt->nr) {
    case 0:
        state->detect = status & PCSR_S0_DETECT ? 0 : 1;
        state->ready  = status & PCSR_S0_READY  ? 1 : 0;
        state->bvd1   = status & PCSR_S0_BVD1   ? 1 : 0;
        state->bvd2   = status & PCSR_S0_BVD2   ? 1 : 0;
        state->wrprot = status & PCSR_S0_WP     ? 1 : 0;
        state->vs_3v  = status & PCSR_S0_VS1    ? 0 : 1;
        state->vs_Xv  = status & PCSR_S0_VS2    ? 0 : 1;
        break;

    case 1:
        state->detect = status & PCSR_S1_DETECT ? 0 : 1;
        state->ready  = status & PCSR_S1_READY  ? 1 : 0;
        state->bvd1   = status & PCSR_S1_BVD1   ? 1 : 0;
        state->bvd2   = status & PCSR_S1_BVD2   ? 1 : 0;
        state->wrprot = status & PCSR_S1_WP     ? 1 : 0;
        state->vs_3v  = status & PCSR_S1_VS1    ? 0 : 1;
        state->vs_Xv  = status & PCSR_S1_VS2    ? 0 : 1;
        break;
    }
}

int sa1111_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
{
    struct sa1111_pcmcia_socket *s = to_skt(skt);
    unsigned int pccr_skt_mask, pccr_set_mask, val;
    unsigned long flags;

    switch (skt->nr) {
    case 0:
        pccr_skt_mask = PCCR_S0_RST|PCCR_S0_FLT|PCCR_S0_PWAITEN|PCCR_S0_PSE;
        break;

    case 1:
        pccr_skt_mask = PCCR_S1_RST|PCCR_S1_FLT|PCCR_S1_PWAITEN|PCCR_S1_PSE;
        break;

    default:
        return -1;
    }

    pccr_set_mask = 0;

    if (state->Vcc != 0)
        pccr_set_mask |= PCCR_S0_PWAITEN|PCCR_S1_PWAITEN;
    if (state->Vcc == 50)
        pccr_set_mask |= PCCR_S0_PSE|PCCR_S1_PSE;
    if (state->flags & SS_RESET)
        pccr_set_mask |= PCCR_S0_RST|PCCR_S1_RST;
    if (state->flags & SS_OUTPUT_ENA)
        pccr_set_mask |= PCCR_S0_FLT|PCCR_S1_FLT;

    local_irq_save(flags);
    val = sa1111_readl(s->dev->mapbase + PCCR);
    val &= ~pccr_skt_mask;
    val |= pccr_set_mask & pccr_skt_mask;
    sa1111_writel(val, s->dev->mapbase + PCCR);
    local_irq_restore(flags);

    return 0;
}

int sa1111_pcmcia_add(struct sa1111_dev *dev, struct pcmcia_low_level *ops,
    int (*add)(struct soc_pcmcia_socket *))
{
    struct sa1111_pcmcia_socket *s;
    int i, ret = 0;

    ops->socket_state = sa1111_pcmcia_socket_state;

    for (i = 0; i < ops->nr; i++) {
        s = kzalloc(sizeof(*s), GFP_KERNEL);
        if (!s)
            return -ENOMEM;

        s->soc.nr = ops->first + i;
        soc_pcmcia_init_one(&s->soc, ops, &dev->dev);
        s->dev = dev;
        if (s->soc.nr) {
            s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S1_READY_NINT];
            s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S1_CD_VALID];
            s->soc.stat[SOC_STAT_CD].name = "SA1111 CF card detect";
            s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S1_BVD1_STSCHG];
            s->soc.stat[SOC_STAT_BVD1].name = "SA1111 CF BVD1";
        } else {
            s->soc.socket.pci_irq = dev->irq[IDX_IRQ_S0_READY_NINT];
            s->soc.stat[SOC_STAT_CD].irq = dev->irq[IDX_IRQ_S0_CD_VALID];
            s->soc.stat[SOC_STAT_CD].name = "SA1111 PCMCIA card detect";
            s->soc.stat[SOC_STAT_BVD1].irq = dev->irq[IDX_IRQ_S0_BVD1_STSCHG];
            s->soc.stat[SOC_STAT_BVD1].name = "SA1111 PCMCIA BVD1";
        }

        ret = add(&s->soc);
        if (ret == 0) {
            s->next = dev_get_drvdata(&dev->dev);
            dev_set_drvdata(&dev->dev, s);
        } else
            kfree(s);
    }

    return ret;
}

static int pcmcia_probe(struct sa1111_dev *dev)
{
    void __iomem *base;
    int ret;

    ret = sa1111_enable_device(dev);
    if (ret)
        return ret;

    dev_set_drvdata(&dev->dev, NULL);

    if (!request_mem_region(dev->res.start, 512, SA1111_DRIVER_NAME(dev))) {
        sa1111_disable_device(dev);
        return -EBUSY;
    }

    base = dev->mapbase;

    /*
     * Initialise the suspend state.
     */
    sa1111_writel(PCSSR_S0_SLEEP | PCSSR_S1_SLEEP, base + PCSSR);
    sa1111_writel(PCCR_S0_FLT | PCCR_S1_FLT, base + PCCR);

#ifdef CONFIG_SA1100_BADGE4
    pcmcia_badge4_init(&dev->dev);
#endif
#ifdef CONFIG_SA1100_JORNADA720
    pcmcia_jornada720_init(&dev->dev);
#endif
#ifdef CONFIG_ARCH_LUBBOCK
    pcmcia_lubbock_init(dev);
#endif
#ifdef CONFIG_ASSABET_NEPONSET
    pcmcia_neponset_init(dev);
#endif
    return 0;
}

static int __devexit pcmcia_remove(struct sa1111_dev *dev)
{
    struct sa1111_pcmcia_socket *next, *s = dev_get_drvdata(&dev->dev);

    dev_set_drvdata(&dev->dev, NULL);

    for (; s; s = next) {
        next = s->next;
        soc_pcmcia_remove_one(&s->soc);
        kfree(s);
    }

    release_mem_region(dev->res.start, 512);
    sa1111_disable_device(dev);
    return 0;
}

static struct sa1111_driver pcmcia_driver = {
    .drv = {
        .name   = "sa1111-pcmcia",
    },
    .devid      = SA1111_DEVID_PCMCIA,
    .probe      = pcmcia_probe,
    .remove     = __devexit_p(pcmcia_remove),
};

static int __init sa1111_drv_pcmcia_init(void)
{
    return sa1111_driver_register(&pcmcia_driver);
}

static void __exit sa1111_drv_pcmcia_exit(void)
{
    sa1111_driver_unregister(&pcmcia_driver);
}

fs_initcall(sa1111_drv_pcmcia_init);
module_exit(sa1111_drv_pcmcia_exit);

MODULE_DESCRIPTION("SA1111 PCMCIA card socket driver");
MODULE_LICENSE("GPL");