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256 lines
6 KiB
C
256 lines
6 KiB
C
/*
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* linux/drivers/pcmcia/pxa2xx_trizeps4.c
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*
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* TRIZEPS PCMCIA specific routines.
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*
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* Author: Jürgen Schindele
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* Created: 20 02, 2006
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* Copyright: Jürgen Schindele
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/gpio.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <asm/mach-types.h>
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#include <asm/irq.h>
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#include <mach/hardware.h>
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#include <mach/pxa-regs.h>
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#include <mach/trizeps4.h>
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#include "soc_common.h"
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extern void board_pcmcia_power(int power);
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static struct pcmcia_irqs irqs[] = {
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{ 0, IRQ_GPIO(GPIO_PCD), "cs0_cd" }
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/* on other baseboards we can have more inputs */
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};
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static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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int ret, i;
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/* we dont have voltage/card/ready detection
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* so we dont need interrupts for it
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*/
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switch (skt->nr) {
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case 0:
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if (gpio_request(GPIO_PRDY, "cf_irq") < 0) {
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pr_err("%s: sock %d unable to request gpio %d\n", __func__,
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skt->nr, GPIO_PRDY);
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return -EBUSY;
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}
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if (gpio_direction_input(GPIO_PRDY) < 0) {
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pr_err("%s: sock %d unable to set input gpio %d\n", __func__,
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skt->nr, GPIO_PRDY);
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gpio_free(GPIO_PRDY);
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return -EINVAL;
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}
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skt->irq = IRQ_GPIO(GPIO_PRDY);
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break;
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#ifndef CONFIG_MACH_TRIZEPS_CONXS
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case 1:
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#endif
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default:
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break;
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}
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/* release the reset of this card */
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pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->irq);
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/* supplementory irqs for the socket */
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for (i = 0; i < ARRAY_SIZE(irqs); i++) {
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if (irqs[i].sock != skt->nr)
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continue;
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if (gpio_request(IRQ_TO_GPIO(irqs[i].irq), irqs[i].str) < 0) {
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pr_err("%s: sock %d unable to request gpio %d\n",
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__func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
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ret = -EBUSY;
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goto error;
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}
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if (gpio_direction_input(IRQ_TO_GPIO(irqs[i].irq)) < 0) {
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pr_err("%s: sock %d unable to set input gpio %d\n",
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__func__, skt->nr, IRQ_TO_GPIO(irqs[i].irq));
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ret = -EINVAL;
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goto error;
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}
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}
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return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
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error:
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for (; i >= 0; i--) {
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gpio_free(IRQ_TO_GPIO(irqs[i].irq));
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}
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return (ret);
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}
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static void trizeps_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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{
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int i;
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/* free allocated gpio's */
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gpio_free(GPIO_PRDY);
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for (i = 0; i < ARRAY_SIZE(irqs); i++)
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gpio_free(IRQ_TO_GPIO(irqs[i].irq));
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}
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static unsigned long trizeps_pcmcia_status[2];
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static void trizeps_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 short status = 0, change;
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status = CFSR_readw();
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change = (status ^ trizeps_pcmcia_status[skt->nr]) &
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ConXS_CFSR_BVD_MASK;
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if (change) {
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trizeps_pcmcia_status[skt->nr] = status;
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if (status & ConXS_CFSR_BVD1) {
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/* enable_irq empty */
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} else {
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/* disable_irq empty */
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}
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}
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switch (skt->nr) {
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case 0:
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/* just fill in fix states */
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state->detect = gpio_get_value(GPIO_PCD) ? 0 : 1;
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state->ready = gpio_get_value(GPIO_PRDY) ? 1 : 0;
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state->bvd1 = (status & ConXS_CFSR_BVD1) ? 1 : 0;
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state->bvd2 = (status & ConXS_CFSR_BVD2) ? 1 : 0;
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state->vs_3v = (status & ConXS_CFSR_VS1) ? 0 : 1;
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state->vs_Xv = (status & ConXS_CFSR_VS2) ? 0 : 1;
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state->wrprot = 0; /* not available */
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break;
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#ifndef CONFIG_MACH_TRIZEPS_CONXS
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/* on ConXS we only have one slot. Second is inactive */
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case 1:
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state->detect = 0;
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state->ready = 0;
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state->bvd1 = 0;
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state->bvd2 = 0;
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state->vs_3v = 0;
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state->vs_Xv = 0;
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state->wrprot = 0;
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break;
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#endif
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}
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}
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static int trizeps_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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int ret = 0;
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unsigned short power = 0;
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/* we do nothing here just check a bit */
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switch (state->Vcc) {
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case 0: power &= 0xfc; break;
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case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
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case 50:
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pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
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break;
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default:
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pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
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ret = -1;
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}
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switch (state->Vpp) {
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case 0: power &= 0xf3; break;
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case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
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case 120:
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pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
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break;
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default:
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if (state->Vpp != state->Vcc) {
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pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
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ret = -1;
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}
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}
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switch (skt->nr) {
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case 0: /* we only have 3.3V */
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board_pcmcia_power(power);
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break;
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#ifndef CONFIG_MACH_TRIZEPS_CONXS
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/* on ConXS we only have one slot. Second is inactive */
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case 1:
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#endif
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default:
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break;
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}
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return ret;
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}
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static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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/* default is on */
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board_pcmcia_power(0x9);
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}
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static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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board_pcmcia_power(0x0);
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}
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static struct pcmcia_low_level trizeps_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = trizeps_pcmcia_hw_init,
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.hw_shutdown = trizeps_pcmcia_hw_shutdown,
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.socket_state = trizeps_pcmcia_socket_state,
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.configure_socket = trizeps_pcmcia_configure_socket,
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.socket_init = trizeps_pcmcia_socket_init,
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.socket_suspend = trizeps_pcmcia_socket_suspend,
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#ifdef CONFIG_MACH_TRIZEPS_CONXS
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.nr = 1,
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#else
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.nr = 2,
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#endif
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.first = 0,
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};
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static struct platform_device *trizeps_pcmcia_device;
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static int __init trizeps_pcmcia_init(void)
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{
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int ret;
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trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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if (!trizeps_pcmcia_device)
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return -ENOMEM;
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ret = platform_device_add_data(trizeps_pcmcia_device,
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&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
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if (ret == 0)
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ret = platform_device_add(trizeps_pcmcia_device);
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if (ret)
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platform_device_put(trizeps_pcmcia_device);
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return ret;
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}
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static void __exit trizeps_pcmcia_exit(void)
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{
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platform_device_unregister(trizeps_pcmcia_device);
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}
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fs_initcall(trizeps_pcmcia_init);
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module_exit(trizeps_pcmcia_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Juergen Schindele");
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MODULE_ALIAS("platform:pxa2xx-pcmcia");
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