Fixed MTP to work with TWRP

drivers/pcmcia/pxa2xx_mainstone.c

@@ -0,0 +1,170 @@
+/*
+ * 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/platform_device.h>
+
+#include <pcmcia/ss.h>
+
+#include <asm/mach-types.h>
+#include <asm/irq.h>
+
+#include <mach/pxa2xx-regs.h>
+#include <mach/mainstone.h>
+
+#include "soc_common.h"
+
+
+static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+	/*
+	 * Setup default state of GPIO outputs
+	 * before we enable them as outputs.
+	 */
+	if (skt->nr == 0) {
+		skt->socket.pci_irq = MAINSTONE_S0_IRQ;
+		skt->stat[SOC_STAT_CD].irq = MAINSTONE_S0_CD_IRQ;
+		skt->stat[SOC_STAT_CD].name = "PCMCIA0 CD";
+		skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S0_STSCHG_IRQ;
+		skt->stat[SOC_STAT_BVD1].name = "PCMCIA0 STSCHG";
+	} else {
+		skt->socket.pci_irq = MAINSTONE_S1_IRQ;
+		skt->stat[SOC_STAT_CD].irq = MAINSTONE_S1_CD_IRQ;
+		skt->stat[SOC_STAT_CD].name = "PCMCIA1 CD";
+		skt->stat[SOC_STAT_BVD1].irq = MAINSTONE_S1_STSCHG_IRQ;
+		skt->stat[SOC_STAT_BVD1].name = "PCMCIA1 STSCHG";
+	}
+	return 0;
+}
+
+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;
+}
+
+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",
+				 __func__, 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",
+					  __func__, 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 struct pcmcia_low_level mst_pcmcia_ops __initdata = {
+	.owner			= THIS_MODULE,
+	.hw_init		= mst_pcmcia_hw_init,
+	.socket_state		= mst_pcmcia_socket_state,
+	.configure_socket	= mst_pcmcia_configure_socket,
+	.nr			= 2,
+};
+
+static struct platform_device *mst_pcmcia_device;
+
+static int __init mst_pcmcia_init(void)
+{
+	int ret;
+
+	if (!machine_is_mainstone())
+		return -ENODEV;
+
+	mst_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+	if (!mst_pcmcia_device)
+		return -ENOMEM;
+
+	ret = platform_device_add_data(mst_pcmcia_device, &mst_pcmcia_ops,
+				       sizeof(mst_pcmcia_ops));
+	if (ret == 0)
+		ret = platform_device_add(mst_pcmcia_device);
+
+	if (ret)
+		platform_device_put(mst_pcmcia_device);
+
+	return ret;
+}
+
+static void __exit mst_pcmcia_exit(void)
+{
+	platform_device_unregister(mst_pcmcia_device);
+}
+
+fs_initcall(mst_pcmcia_init);
+module_exit(mst_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");