File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/drivers/pcmcia/sa1100_nanoengine.c b/drivers/pcmcia/sa1100_nanoengine.c
new file mode 100644
index 0000000..35c30ff
--- /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;
+}
+