125 lines
3.2 KiB
C
125 lines
3.2 KiB
C
/*
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* drivers/pcmcia/sa1100_shannon.c
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*
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* PCMCIA implementation routines for Shannon
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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/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 <mach/shannon.h>
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#include <asm/irq.h>
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#include "sa1100_generic.h"
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static struct pcmcia_irqs irqs[] = {
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{ 0, SHANNON_IRQ_GPIO_EJECT_0, "PCMCIA_CD_0" },
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{ 1, SHANNON_IRQ_GPIO_EJECT_1, "PCMCIA_CD_1" },
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};
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static int shannon_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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/* All those are inputs */
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GPDR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
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SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
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GAFR &= ~(SHANNON_GPIO_EJECT_0 | SHANNON_GPIO_EJECT_1 |
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SHANNON_GPIO_RDY_0 | SHANNON_GPIO_RDY_1);
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skt->irq = skt->nr ? SHANNON_IRQ_GPIO_RDY_1 : SHANNON_IRQ_GPIO_RDY_0;
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return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static void shannon_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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shannon_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
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struct pcmcia_state *state)
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{
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unsigned long levels = GPLR;
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switch (skt->nr) {
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case 0:
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state->detect = (levels & SHANNON_GPIO_EJECT_0) ? 0 : 1;
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state->ready = (levels & SHANNON_GPIO_RDY_0) ? 1 : 0;
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state->wrprot = 0; /* Not available on Shannon. */
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state->bvd1 = 1;
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state->bvd2 = 1;
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state->vs_3v = 1; /* FIXME Can only apply 3.3V on Shannon. */
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state->vs_Xv = 0;
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break;
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case 1:
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state->detect = (levels & SHANNON_GPIO_EJECT_1) ? 0 : 1;
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state->ready = (levels & SHANNON_GPIO_RDY_1) ? 1 : 0;
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state->wrprot = 0; /* Not available on Shannon. */
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state->bvd1 = 1;
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state->bvd2 = 1;
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state->vs_3v = 1; /* FIXME Can only apply 3.3V on Shannon. */
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state->vs_Xv = 0;
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break;
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}
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}
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static int
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shannon_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
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const socket_state_t *state)
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{
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switch (state->Vcc) {
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case 0: /* power off */
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printk(KERN_WARNING "%s(): CS asked for 0V, still applying 3.3V..\n", __func__);
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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", __func__);
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case 33:
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break;
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default:
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printk(KERN_ERR "%s(): unrecognized Vcc %u\n",
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__func__, state->Vcc);
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return -1;
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}
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printk(KERN_WARNING "%s(): Warning, Can't perform reset\n", __func__);
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/* Silently ignore Vpp, output enable, speaker enable. */
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return 0;
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}
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static void shannon_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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soc_pcmcia_enable_irqs(skt, irqs, ARRAY_SIZE(irqs));
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}
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static void shannon_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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static struct pcmcia_low_level shannon_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = shannon_pcmcia_hw_init,
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.hw_shutdown = shannon_pcmcia_hw_shutdown,
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.socket_state = shannon_pcmcia_socket_state,
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.configure_socket = shannon_pcmcia_configure_socket,
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.socket_init = shannon_pcmcia_socket_init,
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.socket_suspend = shannon_pcmcia_socket_suspend,
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};
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int __init pcmcia_shannon_init(struct device *dev)
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{
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int ret = -ENODEV;
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if (machine_is_shannon())
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ret = sa11xx_drv_pcmcia_probe(dev, &shannon_pcmcia_ops, 0, 2);
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return ret;
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}
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