275 строки
7.2 KiB
C
275 строки
7.2 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/device.h>
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#include <asm/hardware.h>
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#include <asm/irq.h>
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#include <asm/hardware/scoop.h>
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#include <asm/arch/pxa-regs.h>
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#include "soc_common.h"
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#define NO_KEEP_VS 0x0001
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static void sharpsl_pcmcia_init_reset(struct scoop_pcmcia_dev *scoopdev)
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{
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reset_scoop(scoopdev->dev);
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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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int ret;
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/*
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* Setup default state of GPIO outputs
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* before we enable them as outputs.
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*/
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GPSR(GPIO48_nPOE) =
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GPIO_bit(GPIO48_nPOE) |
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GPIO_bit(GPIO49_nPWE) |
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GPIO_bit(GPIO50_nPIOR) |
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GPIO_bit(GPIO51_nPIOW) |
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GPIO_bit(GPIO52_nPCE_1) |
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GPIO_bit(GPIO53_nPCE_2);
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pxa_gpio_mode(GPIO48_nPOE_MD);
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pxa_gpio_mode(GPIO49_nPWE_MD);
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pxa_gpio_mode(GPIO50_nPIOR_MD);
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pxa_gpio_mode(GPIO51_nPIOW_MD);
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pxa_gpio_mode(GPIO52_nPCE_1_MD);
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pxa_gpio_mode(GPIO53_nPCE_2_MD);
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pxa_gpio_mode(GPIO54_pSKTSEL_MD);
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pxa_gpio_mode(GPIO55_nPREG_MD);
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pxa_gpio_mode(GPIO56_nPWAIT_MD);
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pxa_gpio_mode(GPIO57_nIOIS16_MD);
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/* Register interrupts */
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if (scoop_devs[skt->nr].cd_irq >= 0) {
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struct pcmcia_irqs cd_irq;
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cd_irq.sock = skt->nr;
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cd_irq.irq = scoop_devs[skt->nr].cd_irq;
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cd_irq.str = scoop_devs[skt->nr].cd_irq_str;
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ret = soc_pcmcia_request_irqs(skt, &cd_irq, 1);
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if (ret) {
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printk(KERN_ERR "Request for Compact Flash IRQ failed\n");
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return ret;
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}
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}
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skt->irq = scoop_devs[skt->nr].irq;
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return 0;
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}
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static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
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{
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if (scoop_devs[skt->nr].cd_irq >= 0) {
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struct pcmcia_irqs cd_irq;
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cd_irq.sock = skt->nr;
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cd_irq.irq = scoop_devs[skt->nr].cd_irq;
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cd_irq.str = scoop_devs[skt->nr].cd_irq_str;
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soc_pcmcia_free_irqs(skt, &cd_irq, 1);
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}
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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_devs[skt->nr].dev;
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cpr = read_scoop_reg(scoop_devs[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_devs[skt->nr].keep_vs = NO_KEEP_VS;
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}
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else if (!(scoop_devs[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_devs[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_devs[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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write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
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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_devs[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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ncpr |= (state->Vcc == 33) ? 0x0001 :
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(state->Vcc == 50) ? 0x0002 : 0;
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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_devs[skt->nr].keep_rd = 0;
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} else if (!scoop_devs[skt->nr].keep_rd) {
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if (nccr & 0x0080)
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scoop_devs[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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write_scoop_reg(scoop, SCOOP_CPR, ncpr);
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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(&scoop_devs[skt->nr]);
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/* Enable interrupt */
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write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_IMR, 0x00C0);
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write_scoop_reg(scoop_devs[skt->nr].dev, SCOOP_MCR, 0x0101);
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scoop_devs[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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/* CF_BUS_OFF */
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sharpsl_pcmcia_init_reset(&scoop_devs[skt->nr]);
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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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.hw_shutdown = sharpsl_pcmcia_hw_shutdown,
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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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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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sharpsl_pcmcia_ops.nr=scoop_num;
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sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL);
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if (!sharpsl_pcmcia_device)
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return -ENOMEM;
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memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device));
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sharpsl_pcmcia_device->name = "pxa2xx-pcmcia";
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sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops;
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sharpsl_pcmcia_device->dev.parent=scoop_devs[0].dev;
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ret = platform_device_register(sharpsl_pcmcia_device);
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if (ret)
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kfree(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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/*
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* This call is supposed to free our sharpsl_pcmcia_device.
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* Unfortunately platform_device don't have a free method, and
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* we can't assume it's free of any reference at this point so we
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* can't free it either.
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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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MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support");
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MODULE_LICENSE("GPL");
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