[ARM PATCH] 1869/1: PCMCIA support for Mainstone

Patch from Nicolas Pitre

drivers/pcmcia/Makefile

@@ -48,4 +48,5 @@ sa1100_cs-$(CONFIG_SA1100_TRIZEPS) 		+= sa1100_trizeps.o
 sa1100_cs-$(CONFIG_SA1100_YOPY)			+= sa1100_yopy.o
 
 pxa2xx_cs-$(CONFIG_ARCH_LUBBOCK)		+= pxa2xx_lubbock.o sa1111_generic.o
+pxa2xx_cs-$(CONFIG_MACH_MAINSTONE)		+= pxa2xx_mainstone.o
 

drivers/pcmcia/pxa2xx_mainstone.c

+/*
+ * linux/drivers/pcmcia/pxa2xx_mainstone.c
+ *
+ * Mainstone PCMCIA specific routines.
+ *
+ * Created:	May 12, 2004
+ * Author:	Nicolas Pitre
+ * Copyright:	MontaVista Software Inc.
+ *
+ * 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 <pcmcia/ss.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+
+#include "soc_common.h"
+
+
+static struct pcmcia_irqs irqs[] = {
+	{ 0, MAINSTONE_S0_CD_IRQ, "PCMCIA0 CD" },
+	{ 1, MAINSTONE_S1_CD_IRQ, "PCMCIA1 CD" },
+	{ 0, MAINSTONE_S0_STSCHG_IRQ, "PCMCIA0 STSCHG" },
+	{ 1, MAINSTONE_S1_STSCHG_IRQ, "PCMCIA1 STSCHG" },
+};
+
+static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+	skt->irq = (skt->nr == 0) ? MAINSTONE_S0_IRQ : MAINSTONE_S1_IRQ;
+	return soc_pcmcia_request_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static void mst_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+	soc_pcmcia_free_irqs(skt, irqs, ARRAY_SIZE(irqs));
+}
+
+static unsigned long mst_pcmcia_status[2];
+
+static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+				    struct pcmcia_state *state)
+{
+	unsigned long status, flip;
+
+	status = (skt->nr == 0) ? MST_PCMCIA0 : MST_PCMCIA1;
+	flip = (status ^ mst_pcmcia_status[skt->nr]) & MST_PCMCIA_nSTSCHG_BVD1;
+
+	/*
+	 * Workaround for STSCHG which can't be deasserted:
+	 * We therefore disable/enable corresponding IRQs
+	 * as needed to avoid IRQ locks.
+	 */
+	if (flip) {
+		mst_pcmcia_status[skt->nr] = status;
+		if (status & MST_PCMCIA_nSTSCHG_BVD1)
+			enable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
+						   : MAINSTONE_S1_STSCHG_IRQ );
+		else
+			disable_irq( (skt->nr == 0) ? MAINSTONE_S0_STSCHG_IRQ
+						    : MAINSTONE_S1_STSCHG_IRQ );
+	}
+
+	state->detect = (status & MST_PCMCIA_nCD) ? 0 : 1;
+	state->ready  = (status & MST_PCMCIA_nIRQ) ? 1 : 0;
+	state->bvd1   = (status & MST_PCMCIA_nSTSCHG_BVD1) ? 1 : 0;
+	state->bvd2   = (status & MST_PCMCIA_nSPKR_BVD2) ? 1 : 0;
+	state->vs_3v  = (status & MST_PCMCIA_nVS1) ? 0 : 1;
+	state->vs_Xv  = (status & MST_PCMCIA_nVS2) ? 0 : 1;
+	state->wrprot = 0;  /* not available */
+}
+
+static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+				       const socket_state_t *state)
+{
+	unsigned long power = 0;
+	int ret = 0;
+
+	switch (state->Vcc) {
+	case 0:  power |= MST_PCMCIA_PWR_VCC_0;  break;
+	case 33: power |= MST_PCMCIA_PWR_VCC_33; break;
+	case 50: power |= MST_PCMCIA_PWR_VCC_50; break;
+	default:
+		 printk(KERN_ERR "%s(): bad Vcc %u\n",
+				 __FUNCTION__, state->Vcc);
+		 ret = -1;
+	}
+
+	switch (state->Vpp) {
+	case 0:   power |= MST_PCMCIA_PWR_VPP_0;   break;
+	case 120: power |= MST_PCMCIA_PWR_VPP_120; break;
+	default:
+		  if(state->Vpp == state->Vcc) {
+			  power |= MST_PCMCIA_PWR_VPP_VCC;
+		  } else {
+			  printk(KERN_ERR "%s(): bad Vpp %u\n",
+					  __FUNCTION__, state->Vpp);
+			  ret = -1;
+		  }
+	}
+
+	if (state->flags & SS_RESET)
+	       power |= MST_PCMCIA_RESET;
+
+	switch (skt->nr) {
+	case 0:  MST_PCMCIA0 = power; break;
+	case 1:  MST_PCMCIA1 = power; break;
+	default: ret = -1;
+	}
+
+	return ret;
+}
+
+static void mst_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+}
+
+static void mst_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+}
+
+static struct pcmcia_low_level mst_pcmcia_ops = {
+	.owner			= THIS_MODULE,
+	.hw_init		= mst_pcmcia_hw_init,
+	.hw_shutdown		= mst_pcmcia_hw_shutdown,
+	.socket_state		= mst_pcmcia_socket_state,
+	.configure_socket	= mst_pcmcia_configure_socket,
+	.socket_init		= mst_pcmcia_socket_init,
+	.socket_suspend		= mst_pcmcia_socket_suspend,
+	.nr			= 2,
+};
+
+static struct platform_device *mst_pcmcia_device;
+
+static int __init mst_pcmcia_init(void)
+{
+	int ret;
+
+	mst_pcmcia_device = kmalloc(sizeof(*mst_pcmcia_device), GFP_KERNEL);
+	if (!mst_pcmcia_device)
+		return -ENOMEM;
+	memset(mst_pcmcia_device, 0, sizeof(*mst_pcmcia_device));
+	mst_pcmcia_device->name = "pxa2xx-pcmcia";
+	mst_pcmcia_device->dev.platform_data = &mst_pcmcia_ops;
+
+	ret = platform_device_register(mst_pcmcia_device);
+	if (ret)
+		kfree(mst_pcmcia_device);
+
+	return ret;
+}
+
+static void __exit mst_pcmcia_exit(void)
+{
+	/*
+	 * This call is supposed to free our mst_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(mst_pcmcia_device);
+}
+
+module_init(mst_pcmcia_init);
+module_exit(mst_pcmcia_exit);
+
+MODULE_LICENSE("GPL");