/* * Sharp SL-C7xx Series PCMCIA routines * * Copyright (c) 2004-2005 Richard Purdie * * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * */ #include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/interrupt.h> #include <linux/device.h> #include <asm/hardware.h> #include <asm/irq.h> #include <asm/hardware/scoop.h> #include <asm/arch/corgi.h> #include <asm/arch/pxa-regs.h> #include "soc_common.h" #define NO_KEEP_VS 0x0001 static unsigned char keep_vs; static unsigned char keep_rd; static struct pcmcia_irqs irqs[] = { { 0, CORGI_IRQ_GPIO_CF_CD, "PCMCIA0 CD"}, }; static void sharpsl_pcmcia_init_reset(void) { reset_scoop(&corgiscoop_device.dev); keep_vs = NO_KEEP_VS; keep_rd = 0; } static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt) { int ret; /* * Setup default state of GPIO outputs * before we enable them as outputs. */ GPSR(GPIO48_nPOE) = GPIO_bit(GPIO48_nPOE) | GPIO_bit(GPIO49_nPWE) | GPIO_bit(GPIO50_nPIOR) | GPIO_bit(GPIO51_nPIOW) | GPIO_bit(GPIO52_nPCE_1) | GPIO_bit(GPIO53_nPCE_2); pxa_gpio_mode(GPIO48_nPOE_MD); pxa_gpio_mode(GPIO49_nPWE_MD); pxa_gpio_mode(GPIO50_nPIOR_MD); pxa_gpio_mode(GPIO51_nPIOW_MD); pxa_gpio_mode(GPIO52_nPCE_1_MD); pxa_gpio_mode(GPIO53_nPCE_2_MD); pxa_gpio_mode(GPIO54_pSKTSEL_MD); pxa_gpio_mode(GPIO55_nPREG_MD); pxa_gpio_mode(GPIO56_nPWAIT_MD); pxa_gpio_mode(GPIO57_nIOIS16_MD); /* Register interrupts */ ret = soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs)); if (ret) { printk(KERN_ERR "Request for Compact Flash IRQ failed\n"); return ret; } /* Enable interrupt */ write_scoop_reg(&corgiscoop_device.dev, SCOOP_IMR, 0x00C0); write_scoop_reg(&corgiscoop_device.dev, SCOOP_MCR, 0x0101); keep_vs = NO_KEEP_VS; skt->irq = CORGI_IRQ_GPIO_CF_IRQ; return 0; } static void sharpsl_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) { soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs)); /* CF_BUS_OFF */ sharpsl_pcmcia_init_reset(); } static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt, struct pcmcia_state *state) { unsigned short cpr, csr; cpr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CPR); write_scoop_reg(&corgiscoop_device.dev, SCOOP_IRM, 0x00FF); write_scoop_reg(&corgiscoop_device.dev, SCOOP_ISR, 0x0000); write_scoop_reg(&corgiscoop_device.dev, SCOOP_IRM, 0x0000); csr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CSR); if (csr & 0x0004) { /* card eject */ write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0000); keep_vs = NO_KEEP_VS; } else if (!(keep_vs & NO_KEEP_VS)) { /* keep vs1,vs2 */ write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0000); csr |= keep_vs; } else if (cpr & 0x0003) { /* power on */ write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0000); keep_vs = (csr & 0x00C0); } else { /* card detect */ write_scoop_reg(&corgiscoop_device.dev, SCOOP_CDR, 0x0002); } state->detect = (csr & 0x0004) ? 0 : 1; state->ready = (csr & 0x0002) ? 1 : 0; state->bvd1 = (csr & 0x0010) ? 1 : 0; state->bvd2 = (csr & 0x0020) ? 1 : 0; state->wrprot = (csr & 0x0008) ? 1 : 0; state->vs_3v = (csr & 0x0040) ? 0 : 1; state->vs_Xv = (csr & 0x0080) ? 0 : 1; if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) { printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr); } } static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt, const socket_state_t *state) { unsigned long flags; unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr; switch (state->Vcc) { case 0: break; case 33: break; case 50: break; default: printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc); return -1; } if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) { printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp); return -1; } local_irq_save(flags); nmcr = (mcr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_MCR)) & ~0x0010; ncpr = (cpr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CPR)) & ~0x0083; nccr = (ccr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_CCR)) & ~0x0080; nimr = (imr = read_scoop_reg(&corgiscoop_device.dev, SCOOP_IMR)) & ~0x003E; ncpr |= (state->Vcc == 33) ? 0x0001 : (state->Vcc == 50) ? 0x0002 : 0; nmcr |= (state->flags&SS_IOCARD) ? 0x0010 : 0; ncpr |= (state->flags&SS_OUTPUT_ENA) ? 0x0080 : 0; nccr |= (state->flags&SS_RESET)? 0x0080: 0; nimr |= ((skt->status&SS_DETECT) ? 0x0004 : 0)| ((skt->status&SS_READY) ? 0x0002 : 0)| ((skt->status&SS_BATDEAD)? 0x0010 : 0)| ((skt->status&SS_BATWARN)? 0x0020 : 0)| ((skt->status&SS_STSCHG) ? 0x0010 : 0)| ((skt->status&SS_WRPROT) ? 0x0008 : 0); if (!(ncpr & 0x0003)) { keep_rd = 0; } else if (!keep_rd) { if (nccr & 0x0080) keep_rd = 1; else nccr |= 0x0080; } if (mcr != nmcr) write_scoop_reg(&corgiscoop_device.dev, SCOOP_MCR, nmcr); if (cpr != ncpr) write_scoop_reg(&corgiscoop_device.dev, SCOOP_CPR, ncpr); if (ccr != nccr) write_scoop_reg(&corgiscoop_device.dev, SCOOP_CCR, nccr); if (imr != nimr) write_scoop_reg(&corgiscoop_device.dev, SCOOP_IMR, nimr); local_irq_restore(flags); return 0; } static void sharpsl_pcmcia_socket_init(struct soc_pcmcia_socket *skt) { } static void sharpsl_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt) { } static struct pcmcia_low_level sharpsl_pcmcia_ops = { .owner = THIS_MODULE, .hw_init = sharpsl_pcmcia_hw_init, .hw_shutdown = sharpsl_pcmcia_hw_shutdown, .socket_state = sharpsl_pcmcia_socket_state, .configure_socket = sharpsl_pcmcia_configure_socket, .socket_init = sharpsl_pcmcia_socket_init, .socket_suspend = sharpsl_pcmcia_socket_suspend, .first = 0, .nr = 1, }; static struct platform_device *sharpsl_pcmcia_device; static int __init sharpsl_pcmcia_init(void) { int ret; sharpsl_pcmcia_device = kmalloc(sizeof(*sharpsl_pcmcia_device), GFP_KERNEL); if (!sharpsl_pcmcia_device) return -ENOMEM; memset(sharpsl_pcmcia_device, 0, sizeof(*sharpsl_pcmcia_device)); sharpsl_pcmcia_device->name = "pxa2xx-pcmcia"; sharpsl_pcmcia_device->dev.platform_data = &sharpsl_pcmcia_ops; ret = platform_device_register(sharpsl_pcmcia_device); if (ret) kfree(sharpsl_pcmcia_device); return ret; } static void __exit sharpsl_pcmcia_exit(void) { /* * This call is supposed to free our sharpsl_pcmcia_device. * Unfortunately platform_device don't have a free method, and * we can't assume it's free of any reference at this point so we * can't free it either. */ platform_device_unregister(sharpsl_pcmcia_device); } module_init(sharpsl_pcmcia_init); module_exit(sharpsl_pcmcia_exit); MODULE_DESCRIPTION("Sharp SL Series PCMCIA Support"); MODULE_LICENSE("GPL");