142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
/*
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* drivers/pcmcia/sa1100_assabet.c
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*
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* PCMCIA implementation routines for Assabet
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*
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/interrupt.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <asm/irq.h>
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#include <asm/signal.h>
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#include <mach/assabet.h>
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#include "sa1100_generic.h"
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static struct pcmcia_irqs irqs[] = {
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{ 1, ASSABET_IRQ_GPIO_CF_CD, "CF CD" },
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{ 1, ASSABET_IRQ_GPIO_CF_BVD2, "CF BVD2" },
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{ 1, ASSABET_IRQ_GPIO_CF_BVD1, "CF BVD1" },
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};
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static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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skt->irq = ASSABET_IRQ_GPIO_CF_IRQ;
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return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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/*
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* Release all resources.
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*/
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static void assabet_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static void
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assabet_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
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{
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unsigned long levels = GPLR;
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state->detect = (levels & ASSABET_GPIO_CF_CD) ? 0 : 1;
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state->ready = (levels & ASSABET_GPIO_CF_IRQ) ? 1 : 0;
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state->bvd1 = (levels & ASSABET_GPIO_CF_BVD1) ? 1 : 0;
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state->bvd2 = (levels & ASSABET_GPIO_CF_BVD2) ? 1 : 0;
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state->wrprot = 0; /* Not available on Assabet. */
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state->vs_3v = 1; /* Can only apply 3.3V on Assabet. */
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state->vs_Xv = 0;
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}
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static int
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assabet_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
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{
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unsigned int mask;
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switch (state->Vcc) {
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case 0:
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mask = 0;
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break;
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case 50:
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printk(KERN_WARNING "%s(): CS asked for 5V, applying 3.3V...\n",
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__func__);
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case 33: /* Can only apply 3.3V to the CF slot. */
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mask = ASSABET_BCR_CF_PWR;
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break;
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default:
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printk(KERN_ERR "%s(): unrecognized Vcc %u\n", __func__,
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state->Vcc);
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return -1;
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}
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/* Silently ignore Vpp, output enable, speaker enable. */
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if (state->flags & SS_RESET)
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mask |= ASSABET_BCR_CF_RST;
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ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR, mask);
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return 0;
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}
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/*
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* Enable card status IRQs on (re-)initialisation. This can
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* be called at initialisation, power management event, or
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* pcmcia event.
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*/
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static void assabet_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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/*
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* Enable CF bus
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*/
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ASSABET_BCR_clear(ASSABET_BCR_CF_BUS_OFF);
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soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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/*
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* Disable card status IRQs on suspend.
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*/
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static void assabet_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_disable_irqs(skt, irqs, ARRAY_SIZE(irqs));
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/*
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* Tristate the CF bus signals. Also assert CF
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* reset as per user guide page 4-11.
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*/
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ASSABET_BCR_set(ASSABET_BCR_CF_BUS_OFF | ASSABET_BCR_CF_RST);
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}
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static struct pcmcia_low_level assabet_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = assabet_pcmcia_hw_init,
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.hw_shutdown = assabet_pcmcia_hw_shutdown,
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.socket_state = assabet_pcmcia_socket_state,
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.configure_socket = assabet_pcmcia_configure_socket,
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.socket_init = assabet_pcmcia_socket_init,
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.socket_suspend = assabet_pcmcia_socket_suspend,
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};
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int __init pcmcia_assabet_init(struct device *dev)
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{
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int ret = -ENODEV;
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if (machine_is_assabet() && !machine_has_neponset())
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ret = sa11xx_drv_pcmcia_probe(dev, &assabet_pcmcia_ops, 1, 1);
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return ret;
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}
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