263 lines
7 KiB
C
263 lines
7 KiB
C
/*
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* Sharp SL-C7xx Series PCMCIA routines
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*
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* Copyright (c) 2004-2005 Richard Purdie
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*
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* Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
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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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*/
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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/errno.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 <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/hardware/scoop.h>
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#include "soc_common.h"
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#define NO_KEEP_VS 0x0001
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#define SCOOP_DEV platform_scoop_config->devs
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static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
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{
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struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];
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reset_scoop(scoopdev->dev);
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/* Shared power controls need to be handled carefully */
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if (platform_scoop_config->power_ctrl)
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platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
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else
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write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);
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scoopdev->keep_vs = NO_KEEP_VS;
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scoopdev->keep_rd = 0;
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}
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static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
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{
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if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
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skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
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skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
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}
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skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;
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return 0;
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}
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static void sharpsl_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 cpr, csr;
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struct device *scoop = SCOOP_DEV[skt->nr].dev;
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cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);
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write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
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write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
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write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
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csr = read_scoop_reg(scoop, SCOOP_CSR);
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if (csr & 0x0004) {
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/* card eject */
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write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
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SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
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}
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else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
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/* keep vs1,vs2 */
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write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
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csr |= SCOOP_DEV[skt->nr].keep_vs;
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}
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else if (cpr & 0x0003) {
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/* power on */
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write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
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SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
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}
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else {
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/* card detect */
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if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
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write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
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} else {
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write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
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}
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}
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state->detect = (csr & 0x0004) ? 0 : 1;
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state->ready = (csr & 0x0002) ? 1 : 0;
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state->bvd1 = (csr & 0x0010) ? 1 : 0;
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state->bvd2 = (csr & 0x0020) ? 1 : 0;
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state->wrprot = (csr & 0x0008) ? 1 : 0;
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state->vs_3v = (csr & 0x0040) ? 0 : 1;
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state->vs_Xv = (csr & 0x0080) ? 0 : 1;
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if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
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printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
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}
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}
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static int sharpsl_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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struct device *scoop = SCOOP_DEV[skt->nr].dev;
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unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;
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switch (state->Vcc) {
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case 0: break;
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case 33: break;
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case 50: break;
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default:
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printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
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return -1;
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}
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if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
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printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
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return -1;
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}
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local_irq_save(flags);
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nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
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ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
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nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
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nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;
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if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
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ncpr |= (state->Vcc == 33) ? 0x0002 :
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(state->Vcc == 50) ? 0x0002 : 0;
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} else {
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ncpr |= (state->Vcc == 33) ? 0x0001 :
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(state->Vcc == 50) ? 0x0002 : 0;
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}
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nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0;
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ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0;
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nccr |= (state->flags&SS_RESET)? 0x0080: 0;
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nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)|
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((skt->status&SS_READY) ? 0x0002 : 0)|
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((skt->status&SS_BATDEAD)? 0x0010 : 0)|
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((skt->status&SS_BATWARN)? 0x0020 : 0)|
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((skt->status&SS_STSCHG) ? 0x0010 : 0)|
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((skt->status&SS_WRPROT) ? 0x0008 : 0);
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if (!(ncpr & 0x0003)) {
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SCOOP_DEV[skt->nr].keep_rd = 0;
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} else if (!SCOOP_DEV[skt->nr].keep_rd) {
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if (nccr & 0x0080)
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SCOOP_DEV[skt->nr].keep_rd = 1;
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else
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nccr |= 0x0080;
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}
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if (mcr != nmcr)
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write_scoop_reg(scoop, SCOOP_MCR, nmcr);
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if (cpr != ncpr) {
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if (platform_scoop_config->power_ctrl)
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platform_scoop_config->power_ctrl(scoop, ncpr , skt->nr);
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else
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write_scoop_reg(scoop, SCOOP_CPR, ncpr);
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}
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if (ccr != nccr)
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write_scoop_reg(scoop, SCOOP_CCR, nccr);
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if (imr != nimr)
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write_scoop_reg(scoop, SCOOP_IMR, nimr);
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local_irq_restore(flags);
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return 0;
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}
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static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
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{
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sharpsl_pcmcia_init_reset(skt);
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/* Enable interrupt */
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write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_IMR, 0x00C0);
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write_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_MCR, 0x0101);
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SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
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}
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static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
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{
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sharpsl_pcmcia_init_reset(skt);
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}
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static struct pcmcia_low_level sharpsl_pcmcia_ops = {
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.owner = THIS_MODULE,
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.hw_init = sharpsl_pcmcia_hw_init,
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.socket_state = sharpsl_pcmcia_socket_state,
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.configure_socket = sharpsl_pcmcia_configure_socket,
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.socket_init = sharpsl_pcmcia_socket_init,
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.socket_suspend = sharpsl_pcmcia_socket_suspend,
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.first = 0,
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.nr = 0,
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};
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#ifdef CONFIG_SA1100_COLLIE
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#include "sa11xx_base.h"
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int pcmcia_collie_init(struct device *dev)
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{
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int ret = -ENODEV;
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if (machine_is_collie())
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ret = sa11xx_drv_pcmcia_probe(dev, &sharpsl_pcmcia_ops, 0, 1);
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return ret;
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}
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#else
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static struct platform_device *sharpsl_pcmcia_device;
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static int __init sharpsl_pcmcia_init(void)
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{
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int ret;
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if (!platform_scoop_config)
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return -ENODEV;
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sharpsl_pcmcia_ops.nr = platform_scoop_config->num_devs;
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sharpsl_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
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if (!sharpsl_pcmcia_device)
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return -ENOMEM;
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ret = platform_device_add_data(sharpsl_pcmcia_device,
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&sharpsl_pcmcia_ops, sizeof(sharpsl_pcmcia_ops));
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if (ret == 0) {
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sharpsl_pcmcia_device->dev.parent = platform_scoop_config->devs[0].dev;
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ret = platform_device_add(sharpsl_pcmcia_device);
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}
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if (ret)
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platform_device_put(sharpsl_pcmcia_device);
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return ret;
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}
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static void __exit sharpsl_pcmcia_exit(void)
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{
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platform_device_unregister(sharpsl_pcmcia_device);
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}
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fs_initcall(sharpsl_pcmcia_init);
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module_exit(sharpsl_pcmcia_exit);
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#endif
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MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:pxa2xx-pcmcia");
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