Fixed MTP to work with TWRP

drivers/pcmcia/pxa2xx_trizeps4.c

@@ -0,0 +1,203 @@
+/*
+ * linux/drivers/pcmcia/pxa2xx_trizeps4.c
+ *
+ * TRIZEPS PCMCIA specific routines.
+ *
+ * Author:	Jürgen Schindele
+ * Created:	20 02, 2006
+ * Copyright:	Jürgen Schindele
+ *
+ * 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/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-types.h>
+#include <asm/irq.h>
+
+#include <mach/pxa2xx-regs.h>
+#include <mach/trizeps4.h>
+
+#include "soc_common.h"
+
+extern void board_pcmcia_power(int power);
+
+static int trizeps_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+	/* we dont have voltage/card/ready detection
+	 * so we dont need interrupts for it
+	 */
+	switch (skt->nr) {
+	case 0:
+		skt->stat[SOC_STAT_CD].gpio = GPIO_PCD;
+		skt->stat[SOC_STAT_CD].name = "cs0_cd";
+		skt->stat[SOC_STAT_RDY].gpio = GPIO_PRDY;
+		skt->stat[SOC_STAT_RDY].name = "cs0_rdy";
+		break;
+	default:
+		break;
+	}
+	/* release the reset of this card */
+	pr_debug("%s: sock %d irq %d\n", __func__, skt->nr, skt->socket.pci_irq);
+
+	return 0;
+}
+
+static unsigned long trizeps_pcmcia_status[2];
+
+static void trizeps_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+				struct pcmcia_state *state)
+{
+	unsigned short status = 0, change;
+	status = CFSR_readw();
+	change = (status ^ trizeps_pcmcia_status[skt->nr]) &
+				ConXS_CFSR_BVD_MASK;
+	if (change) {
+		trizeps_pcmcia_status[skt->nr] = status;
+		if (status & ConXS_CFSR_BVD1) {
+			/* enable_irq empty */
+		} else {
+			/* disable_irq empty */
+		}
+	}
+
+	switch (skt->nr) {
+	case 0:
+		/* just fill in fix states */
+		state->bvd1   = (status & ConXS_CFSR_BVD1) ? 1 : 0;
+		state->bvd2   = (status & ConXS_CFSR_BVD2) ? 1 : 0;
+		state->vs_3v  = (status & ConXS_CFSR_VS1) ? 0 : 1;
+		state->vs_Xv  = (status & ConXS_CFSR_VS2) ? 0 : 1;
+		break;
+
+#ifndef CONFIG_MACH_TRIZEPS_CONXS
+	/* on ConXS we only have one slot. Second is inactive */
+	case 1:
+		state->detect = 0;
+		state->ready  = 0;
+		state->bvd1   = 0;
+		state->bvd2   = 0;
+		state->vs_3v  = 0;
+		state->vs_Xv  = 0;
+		break;
+
+#endif
+	}
+}
+
+static int trizeps_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+				const socket_state_t *state)
+{
+	int ret = 0;
+	unsigned short power = 0;
+
+	/* we do nothing here just check a bit */
+	switch (state->Vcc) {
+	case 0:  power &= 0xfc; break;
+	case 33: power |= ConXS_BCR_S0_VCC_3V3; break;
+	case 50:
+		pr_err("%s(): Vcc 5V not supported in socket\n", __func__);
+		break;
+	default:
+		pr_err("%s(): bad Vcc %u\n", __func__, state->Vcc);
+		ret = -1;
+	}
+
+	switch (state->Vpp) {
+	case 0:  power &= 0xf3; break;
+	case 33: power |= ConXS_BCR_S0_VPP_3V3; break;
+	case 120:
+		pr_err("%s(): Vpp 12V not supported in socket\n", __func__);
+		break;
+	default:
+		if (state->Vpp != state->Vcc) {
+			pr_err("%s(): bad Vpp %u\n", __func__, state->Vpp);
+			ret = -1;
+		}
+	}
+
+	switch (skt->nr) {
+	case 0:			 /* we only have 3.3V */
+		board_pcmcia_power(power);
+		break;
+
+#ifndef CONFIG_MACH_TRIZEPS_CONXS
+	/* on ConXS we only have one slot. Second is inactive */
+	case 1:
+#endif
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+static void trizeps_pcmcia_socket_init(struct soc_pcmcia_socket *skt)
+{
+	/* default is on */
+	board_pcmcia_power(0x9);
+}
+
+static void trizeps_pcmcia_socket_suspend(struct soc_pcmcia_socket *skt)
+{
+	board_pcmcia_power(0x0);
+}
+
+static struct pcmcia_low_level trizeps_pcmcia_ops = {
+	.owner			= THIS_MODULE,
+	.hw_init		= trizeps_pcmcia_hw_init,
+	.socket_state		= trizeps_pcmcia_socket_state,
+	.configure_socket	= trizeps_pcmcia_configure_socket,
+	.socket_init		= trizeps_pcmcia_socket_init,
+	.socket_suspend		= trizeps_pcmcia_socket_suspend,
+#ifdef CONFIG_MACH_TRIZEPS_CONXS
+	.nr			= 1,
+#else
+	.nr			= 2,
+#endif
+	.first			= 0,
+};
+
+static struct platform_device *trizeps_pcmcia_device;
+
+static int __init trizeps_pcmcia_init(void)
+{
+	int ret;
+
+	if (!machine_is_trizeps4() && !machine_is_trizeps4wl())
+		return -ENODEV;
+
+	trizeps_pcmcia_device = platform_device_alloc("pxa2xx-pcmcia", -1);
+	if (!trizeps_pcmcia_device)
+		return -ENOMEM;
+
+	ret = platform_device_add_data(trizeps_pcmcia_device,
+			&trizeps_pcmcia_ops, sizeof(trizeps_pcmcia_ops));
+
+	if (ret == 0)
+		ret = platform_device_add(trizeps_pcmcia_device);
+
+	if (ret)
+		platform_device_put(trizeps_pcmcia_device);
+
+	return ret;
+}
+
+static void __exit trizeps_pcmcia_exit(void)
+{
+	platform_device_unregister(trizeps_pcmcia_device);
+}
+
+fs_initcall(trizeps_pcmcia_init);
+module_exit(trizeps_pcmcia_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Juergen Schindele");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");