mirror of
https://github.com/edk2-porting/linux-next.git
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a1d0500261
Add a helper to get the voltage state of CF sockets, where the voltage sense pins are not wired up. Switch assabet and cerf to use this helper. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
100 lines
2.3 KiB
C
100 lines
2.3 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 <linux/gpio.h>
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#include <asm/mach-types.h>
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#include <mach/assabet.h>
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#include "sa1100_generic.h"
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static int assabet_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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skt->stat[SOC_STAT_CD].gpio = ASSABET_GPIO_CF_CD;
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skt->stat[SOC_STAT_CD].name = "CF CD";
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skt->stat[SOC_STAT_BVD1].gpio = ASSABET_GPIO_CF_BVD1;
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skt->stat[SOC_STAT_BVD1].name = "CF BVD1";
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skt->stat[SOC_STAT_BVD2].gpio = ASSABET_GPIO_CF_BVD2;
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skt->stat[SOC_STAT_BVD2].name = "CF BVD2";
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skt->stat[SOC_STAT_RDY].gpio = ASSABET_GPIO_CF_IRQ;
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skt->stat[SOC_STAT_RDY].name = "CF RDY";
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return 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, speaker enable. */
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if (state->flags & SS_RESET)
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mask |= ASSABET_BCR_CF_RST;
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if (!(state->flags & SS_OUTPUT_ENA))
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mask |= ASSABET_BCR_CF_BUS_OFF;
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ASSABET_BCR_frob(ASSABET_BCR_CF_RST | ASSABET_BCR_CF_PWR |
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ASSABET_BCR_CF_BUS_OFF, mask);
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return 0;
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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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/*
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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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.socket_state = soc_common_cf_socket_state,
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.configure_socket = assabet_pcmcia_configure_socket,
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.socket_suspend = assabet_pcmcia_socket_suspend,
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};
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int 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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