1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/pcmcia/pxa2xx_mainstone.c b/drivers/pcmcia/pxa2xx_mainstone.c
new file mode 100644
index 000000000..a076e4108
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_mainstone.c
@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/drivers/pcmcia/pxa2xx_mainstone.c
+ *
+ * Mainstone PCMCIA specific routines.
+ *
+ * Created:	May 12, 2004
+ * Author:	Nicolas Pitre
+ * Copyright:	MontaVista Software Inc.
+ */
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/platform_device.h>
+
+#include <pcmcia/ss.h>
+
+#include <asm/mach-types.h>
+
+#include "soc_common.h"
+#include "max1600.h"
+
+static int mst_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
+{
+	struct device *dev = skt->socket.dev.parent;
+	struct max1600 *m;
+	int ret;
+
+	skt->stat[SOC_STAT_CD].name = skt->nr ? "bdetect" : "adetect";
+	skt->stat[SOC_STAT_BVD1].name = skt->nr ? "bbvd1" : "abvd1";
+	skt->stat[SOC_STAT_BVD2].name = skt->nr ? "bbvd2" : "abvd2";
+	skt->stat[SOC_STAT_RDY].name = skt->nr ? "bready" : "aready";
+	skt->stat[SOC_STAT_VS1].name = skt->nr ? "bvs1" : "avs1";
+	skt->stat[SOC_STAT_VS2].name = skt->nr ? "bvs2" : "avs2";
+
+	skt->gpio_reset = devm_gpiod_get(dev, skt->nr ? "breset" : "areset",
+					 GPIOD_OUT_HIGH);
+	if (IS_ERR(skt->gpio_reset))
+		return PTR_ERR(skt->gpio_reset);
+
+	ret = max1600_init(dev, &m, skt->nr ? MAX1600_CHAN_B : MAX1600_CHAN_A,
+			   MAX1600_CODE_HIGH);
+	if (ret)
+		return ret;
+
+	skt->driver_data = m;
+
+	return soc_pcmcia_request_gpiods(skt);
+}
+
+static unsigned int mst_pcmcia_bvd1_status[2];
+
+static void mst_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
+				    struct pcmcia_state *state)
+{
+	unsigned int flip = mst_pcmcia_bvd1_status[skt->nr] ^ state->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_bvd1_status[skt->nr] = state->bvd1;
+		if (state->bvd1)
+			enable_irq(skt->stat[SOC_STAT_BVD1].irq);
+		else
+			disable_irq(skt->stat[SOC_STAT_BVD2].irq);
+	}
+}
+
+static int mst_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
+				       const socket_state_t *state)
+{
+	return max1600_configure(skt->driver_data, state->Vcc, state->Vpp);
+}
+
+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");