drivers/pcmcia/sa1100_h3600.c

Source file repositories/reference/linux-study-clean/drivers/pcmcia/sa1100_h3600.c

File Facts

System
Linux kernel
Corpus path
drivers/pcmcia/sa1100_h3600.c
Extension
.c
Size
3997 bytes
Lines
164
Domain
Driver Families
Bucket
drivers/pcmcia
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * drivers/pcmcia/sa1100_h3600.c
 *
 * PCMCIA implementation routines for H3600
 *
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/gpio.h>

#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <mach/h3xxx.h>

#include "sa1100_generic.h"

static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	int err;

	skt->stat[SOC_STAT_CD].name = skt->nr ? "pcmcia1-detect" : "pcmcia0-detect";
	skt->stat[SOC_STAT_RDY].name = skt->nr ? "pcmcia1-ready" : "pcmcia0-ready";

	err = soc_pcmcia_request_gpiods(skt);
	if (err)
		return err;

	switch (skt->nr) {
	case 0:
		err = gpio_request(H3XXX_EGPIO_OPT_NVRAM_ON, "OPT NVRAM ON");
		if (err)
			goto err01;
		err = gpio_direction_output(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
		if (err)
			goto err03;
		err = gpio_request(H3XXX_EGPIO_OPT_ON, "OPT ON");
		if (err)
			goto err03;
		err = gpio_direction_output(H3XXX_EGPIO_OPT_ON, 0);
		if (err)
			goto err04;
		err = gpio_request(H3XXX_EGPIO_OPT_RESET, "OPT RESET");
		if (err)
			goto err04;
		err = gpio_direction_output(H3XXX_EGPIO_OPT_RESET, 0);
		if (err)
			goto err05;
		err = gpio_request(H3XXX_EGPIO_CARD_RESET, "PCMCIA CARD RESET");
		if (err)
			goto err05;
		err = gpio_direction_output(H3XXX_EGPIO_CARD_RESET, 0);
		if (err)
			goto err06;
		break;
	case 1:
		break;
	}
	return 0;

err06:	gpio_free(H3XXX_EGPIO_CARD_RESET);
err05:	gpio_free(H3XXX_EGPIO_OPT_RESET);
err04:	gpio_free(H3XXX_EGPIO_OPT_ON);
err03:	gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
err01:	gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
	return err;
}

static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
{
	switch (skt->nr) {
	case 0:
		/* Disable CF bus: */
		gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
		gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
		gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);

		gpio_free(H3XXX_EGPIO_CARD_RESET);
		gpio_free(H3XXX_EGPIO_OPT_RESET);
		gpio_free(H3XXX_EGPIO_OPT_ON);
		gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
		break;
	case 1:
		break;
	}

Annotation

Implementation Notes