164 lines
3.9 KiB
C
164 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* drivers/pcmcia/sa1100_h3600.c
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*
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* PCMCIA implementation routines for H3600
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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/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/mach-types.h>
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#include <mach/h3xxx.h>
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#include "sa1100_generic.h"
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static int h3600_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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int err;
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skt->stat[SOC_STAT_CD].name = skt->nr ? "pcmcia1-detect" : "pcmcia0-detect";
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skt->stat[SOC_STAT_RDY].name = skt->nr ? "pcmcia1-ready" : "pcmcia0-ready";
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err = soc_pcmcia_request_gpiods(skt);
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if (err)
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return err;
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switch (skt->nr) {
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case 0:
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err = gpio_request(H3XXX_EGPIO_OPT_NVRAM_ON, "OPT NVRAM ON");
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if (err)
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goto err01;
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err = gpio_direction_output(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
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if (err)
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goto err03;
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err = gpio_request(H3XXX_EGPIO_OPT_ON, "OPT ON");
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if (err)
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goto err03;
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err = gpio_direction_output(H3XXX_EGPIO_OPT_ON, 0);
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if (err)
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goto err04;
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err = gpio_request(H3XXX_EGPIO_OPT_RESET, "OPT RESET");
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if (err)
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goto err04;
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err = gpio_direction_output(H3XXX_EGPIO_OPT_RESET, 0);
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if (err)
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goto err05;
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err = gpio_request(H3XXX_EGPIO_CARD_RESET, "PCMCIA CARD RESET");
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if (err)
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goto err05;
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err = gpio_direction_output(H3XXX_EGPIO_CARD_RESET, 0);
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if (err)
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goto err06;
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break;
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case 1:
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break;
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}
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return 0;
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err06: gpio_free(H3XXX_EGPIO_CARD_RESET);
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err05: gpio_free(H3XXX_EGPIO_OPT_RESET);
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err04: gpio_free(H3XXX_EGPIO_OPT_ON);
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err03: gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
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err01: gpio_free(H3XXX_GPIO_PCMCIA_IRQ0);
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return err;
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}
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static void h3600_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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{
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switch (skt->nr) {
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case 0:
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/* Disable CF bus: */
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gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
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gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
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gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
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gpio_free(H3XXX_EGPIO_CARD_RESET);
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gpio_free(H3XXX_EGPIO_OPT_RESET);
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gpio_free(H3XXX_EGPIO_OPT_ON);
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gpio_free(H3XXX_EGPIO_OPT_NVRAM_ON);
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break;
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case 1:
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break;
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}
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}
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static void
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h3600_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
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{
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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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}
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static int
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h3600_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state)
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{
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if (state->Vcc != 0 && state->Vcc != 33 && state->Vcc != 50) {
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printk(KERN_ERR "h3600_pcmcia: unrecognized Vcc %u.%uV\n",
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state->Vcc / 10, state->Vcc % 10);
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return -1;
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}
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gpio_set_value(H3XXX_EGPIO_CARD_RESET, !!(state->flags & SS_RESET));
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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 h3600_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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/* Enable CF bus: */
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gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 1);
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gpio_set_value(H3XXX_EGPIO_OPT_ON, 1);
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gpio_set_value(H3XXX_EGPIO_OPT_RESET, 0);
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msleep(10);
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}
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static void h3600_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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/*
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* FIXME: This doesn't fit well. We don't have the mechanism in
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* the generic PCMCIA layer to deal with the idea of two sockets
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* on one bus. We rely on the cs.c behaviour shutting down
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* socket 0 then socket 1.
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*/
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if (skt->nr == 1) {
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gpio_set_value(H3XXX_EGPIO_OPT_ON, 0);
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gpio_set_value(H3XXX_EGPIO_OPT_NVRAM_ON, 0);
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/* hmm, does this suck power? */
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gpio_set_value(H3XXX_EGPIO_OPT_RESET, 1);
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}
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}
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struct pcmcia_low_level h3600_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = h3600_pcmcia_hw_init,
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.hw_shutdown = h3600_pcmcia_hw_shutdown,
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.socket_state = h3600_pcmcia_socket_state,
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.configure_socket = h3600_pcmcia_configure_socket,
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.socket_init = h3600_pcmcia_socket_init,
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.socket_suspend = h3600_pcmcia_socket_suspend,
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};
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int pcmcia_h3600_init(struct device *dev)
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{
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int ret = -ENODEV;
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if (machine_is_h3600())
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ret = sa11xx_drv_pcmcia_probe(dev, &h3600_pcmcia_ops, 0, 2);
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return ret;
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}
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