116 lines
2.4 KiB
C
116 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* drivers/pcmcia/sa1100_simpad.c
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*
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* PCMCIA implementation routines for simpad
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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/simpad.h>
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#include "sa1100_generic.h"
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static int simpad_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
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skt->stat[SOC_STAT_CD].name = "cf-detect";
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skt->stat[SOC_STAT_RDY].name = "cf-ready";
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return soc_pcmcia_request_gpiods(skt);
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}
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static void simpad_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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{
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/* Disable CF bus: */
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/*simpad_set_cs3_bit(PCMCIA_BUFF_DIS);*/
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simpad_clear_cs3_bit(PCMCIA_RESET);
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}
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static void
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simpad_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
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struct pcmcia_state *state)
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{
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long cs3reg = simpad_get_cs3_ro();
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/* bvd1 might be cs3reg & PCMCIA_BVD1 */
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/* bvd2 might be cs3reg & PCMCIA_BVD2 */
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if ((cs3reg & (PCMCIA_VS1|PCMCIA_VS2)) ==
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(PCMCIA_VS1|PCMCIA_VS2)) {
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state->vs_3v=0;
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state->vs_Xv=0;
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} else {
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state->vs_3v=1;
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state->vs_Xv=0;
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}
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}
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static int
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simpad_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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unsigned long flags;
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local_irq_save(flags);
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/* Murphy: see table of MIC2562a-1 */
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switch (state->Vcc) {
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case 0:
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simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
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break;
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case 33:
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simpad_clear_cs3_bit(VCC_3V_EN|EN1);
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simpad_set_cs3_bit(VCC_5V_EN|EN0);
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break;
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case 50:
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simpad_clear_cs3_bit(VCC_5V_EN|EN1);
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simpad_set_cs3_bit(VCC_3V_EN|EN0);
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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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simpad_clear_cs3_bit(VCC_3V_EN|VCC_5V_EN|EN0|EN1);
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local_irq_restore(flags);
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return -1;
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}
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local_irq_restore(flags);
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return 0;
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}
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static void simpad_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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simpad_set_cs3_bit(PCMCIA_RESET);
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}
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static struct pcmcia_low_level simpad_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = simpad_pcmcia_hw_init,
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.hw_shutdown = simpad_pcmcia_hw_shutdown,
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.socket_state = simpad_pcmcia_socket_state,
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.configure_socket = simpad_pcmcia_configure_socket,
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.socket_suspend = simpad_pcmcia_socket_suspend,
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};
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int pcmcia_simpad_init(struct device *dev)
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{
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int ret = -ENODEV;
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if (machine_is_simpad())
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ret = sa11xx_drv_pcmcia_probe(dev, &simpad_pcmcia_ops, 1, 1);
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return ret;
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}
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