From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/pcmcia/sa1100_nanoengine.c | 133 +++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 drivers/pcmcia/sa1100_nanoengine.c

(limited to 'drivers/pcmcia/sa1100_nanoengine.c')

diff --git a/drivers/pcmcia/sa1100_nanoengine.c b/drivers/pcmcia/sa1100_nanoengine.c
new file mode 100644
index 000000000..35c30ff41
--- /dev/null
+++ b/drivers/pcmcia/sa1100_nanoengine.c
@@ -0,0 +1,133 @@
+/*
+ * drivers/pcmcia/sa1100_nanoengine.c
+ *
+ * PCMCIA implementation routines for BSI nanoEngine.
+ *
+ * In order to have a fully functional pcmcia subsystem in a BSE nanoEngine
+ * board you should carefully read this:
+ * http://cambuca.ldhs.cetuc.puc-rio.br/nanoengine/
+ *
+ * Copyright (C) 2010 Marcelo Roberto Jimenez <mroberto@cpti.cetuc.puc-rio.br>
+ *
+ * Based on original work for kernel 2.4 by
+ * Miguel Freitas <miguel@cpti.cetuc.puc-rio.br>
+ *
+ * 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/device.h>
+#include <linux/errno.h>
+#include <linux/gpio.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/signal.h>
+
+#include <asm/mach-types.h>
+#include <asm/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/nanoengine.h>
+
+#include "sa1100_generic.h"
+
+struct nanoengine_pins {
+	unsigned output_pins;
+	unsigned clear_outputs;
+	int gpio_rst;
+	int gpio_cd;
+	int gpio_rdy;
+};
+
+static struct nanoengine_pins nano_skts[] = {
+	{
+		.gpio_rst		= GPIO_PC_RESET0,
+		.gpio_cd		= GPIO_PC_CD0,
+		.gpio_rdy		= GPIO_PC_READY0,
+	}, {
+		.gpio_rst		= GPIO_PC_RESET1,
+		.gpio_cd		= GPIO_PC_CD1,
+		.gpio_rdy		= GPIO_PC_READY1,
+	}
+};
+
+unsigned num_nano_pcmcia_sockets = ARRAY_SIZE(nano_skts);
+
+static int nanoengine_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+	unsigned i = skt->nr;
+	int ret;
+
+	if (i >= num_nano_pcmcia_sockets)
+		return -ENXIO;
+
+	ret = gpio_request_one(nano_skts[i].gpio_rst, GPIOF_OUT_INIT_LOW,
+		i ? "PC RST1" : "PC RST0");
+	if (ret)
+		return ret;
+
+	skt->stat[SOC_STAT_CD].gpio = nano_skts[i].gpio_cd;
+	skt->stat[SOC_STAT_CD].name = i ? "PC CD1" : "PC CD0";
+	skt->stat[SOC_STAT_RDY].gpio = nano_skts[i].gpio_rdy;
+	skt->stat[SOC_STAT_RDY].name = i ? "PC RDY1" : "PC RDY0";
+
+	return 0;
+}
+
+static void nanoengine_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt)
+{
+	gpio_free(nano_skts[skt->nr].gpio_rst);
+}
+
+static int nanoengine_pcmcia_configure_socket(
+	struct soc_pcmcia_socket *skt, const socket_state_t *state)
+{
+	unsigned i = skt->nr;
+
+	if (i >= num_nano_pcmcia_sockets)
+		return -ENXIO;
+
+	gpio_set_value(nano_skts[skt->nr].gpio_rst, !!(state->flags & SS_RESET));
+
+	return 0;
+}
+
+static void nanoengine_pcmcia_socket_state(
+	struct soc_pcmcia_socket *skt, struct pcmcia_state *state)
+{
+	unsigned i = skt->nr;
+
+	if (i >= num_nano_pcmcia_sockets)
+		return;
+
+	state->bvd1 = 1;
+	state->bvd2 = 1;
+	state->vs_3v = 1; /* Can only apply 3.3V */
+	state->vs_Xv = 0;
+}
+
+static struct pcmcia_low_level nanoengine_pcmcia_ops = {
+	.owner			= THIS_MODULE,
+
+	.hw_init		= nanoengine_pcmcia_hw_init,
+	.hw_shutdown		= nanoengine_pcmcia_hw_shutdown,
+
+	.configure_socket	= nanoengine_pcmcia_configure_socket,
+	.socket_state		= nanoengine_pcmcia_socket_state,
+};
+
+int pcmcia_nanoengine_init(struct device *dev)
+{
+	int ret = -ENODEV;
+
+	if (machine_is_nanoengine())
+		ret = sa11xx_drv_pcmcia_probe(
+			dev, &nanoengine_pcmcia_ops, 0, 2);
+
+	return ret;
+}
+
-- 
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