1 files changed, 160 insertions, 0 deletions
diff --git a/drivers/staging/comedi/comedi_pcmcia.c b/drivers/staging/comedi/comedi_pcmcia.c
new file mode 100644
index 000000000000..453ff3b28617
--- /dev/null
+++ b/drivers/staging/comedi/comedi_pcmcia.c
@@ -0,0 +1,160 @@
+/*
+ * comedi_pcmcia.c
+ * Comedi PCMCIA driver specific functions.
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/kernel.h>
+
+#include <pcmcia/cistpl.h>
+#include <pcmcia/ds.h>
+
+#include "comedidev.h"
+
+/**
+ * comedi_to_pcmcia_dev() - comedi_device pointer to pcmcia_device pointer.
+ * @dev: comedi_device struct
+ */
+struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *dev)
+{
+	return dev->hw_dev ? to_pcmcia_dev(dev->hw_dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(comedi_to_pcmcia_dev);
+
+static int comedi_pcmcia_conf_check(struct pcmcia_device *link,
+				    void *priv_data)
+{
+	if (link->config_index == 0)
+		return -EINVAL;
+
+	return pcmcia_request_io(link);
+}
+
+/**
+ * comedi_pcmcia_enable() - Request the regions and enable the PCMCIA device.
+ * @dev: comedi_device struct
+ * @conf_check: optional callback to check the pcmcia_device configuration
+ *
+ * The comedi PCMCIA driver needs to set the link->config_flags, as
+ * appropriate for that driver, before calling this function in order
+ * to allow pcmcia_loop_config() to do its internal autoconfiguration.
+ */
+int comedi_pcmcia_enable(struct comedi_device *dev,
+			 int (*conf_check)(struct pcmcia_device *, void *))
+{
+	struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
+	int ret;
+
+	if (!link)
+		return -ENODEV;
+
+	if (!conf_check)
+		conf_check = comedi_pcmcia_conf_check;
+
+	ret = pcmcia_loop_config(link, conf_check, NULL);
+	if (ret)
+		return ret;
+
+	return pcmcia_enable_device(link);
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_enable);
+
+/**
+ * comedi_pcmcia_disable() - Disable the PCMCIA device and release the regions.
+ * @dev: comedi_device struct
+ */
+void comedi_pcmcia_disable(struct comedi_device *dev)
+{
+	struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
+
+	if (link)
+		pcmcia_disable_device(link);
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_disable);
+
+/**
+ * comedi_pcmcia_auto_config() - Configure/probe a comedi PCMCIA driver.
+ * @link: pcmcia_device struct
+ * @driver: comedi_driver struct
+ *
+ * Typically called from the pcmcia_driver (*probe) function.
+ */
+int comedi_pcmcia_auto_config(struct pcmcia_device *link,
+			      struct comedi_driver *driver)
+{
+	return comedi_auto_config(&link->dev, driver, 0);
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_auto_config);
+
+/**
+ * comedi_pcmcia_auto_unconfig() - Unconfigure/remove a comedi PCMCIA driver.
+ * @link: pcmcia_device struct
+ *
+ * Typically called from the pcmcia_driver (*remove) function.
+ */
+void comedi_pcmcia_auto_unconfig(struct pcmcia_device *link)
+{
+	comedi_auto_unconfig(&link->dev);
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_auto_unconfig);
+
+/**
+ * comedi_pcmcia_driver_register() - Register a comedi PCMCIA driver.
+ * @comedi_driver: comedi_driver struct
+ * @pcmcia_driver: pcmcia_driver struct
+ *
+ * This function is used for the module_init() of comedi USB drivers.
+ * Do not call it directly, use the module_comedi_pcmcia_driver() helper
+ * macro instead.
+ */
+int comedi_pcmcia_driver_register(struct comedi_driver *comedi_driver,
+				  struct pcmcia_driver *pcmcia_driver)
+{
+	int ret;
+
+	ret = comedi_driver_register(comedi_driver);
+	if (ret < 0)
+		return ret;
+
+	ret = pcmcia_register_driver(pcmcia_driver);
+	if (ret < 0) {
+		comedi_driver_unregister(comedi_driver);
+		return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_register);
+
+/**
+ * comedi_pcmcia_driver_unregister() - Unregister a comedi PCMCIA driver.
+ * @comedi_driver: comedi_driver struct
+ * @pcmcia_driver: pcmcia_driver struct
+ *
+ * This function is used for the module_exit() of comedi PCMCIA drivers.
+ * Do not call it directly, use the module_comedi_pcmcia_driver() helper
+ * macro instead.
+ */
+void comedi_pcmcia_driver_unregister(struct comedi_driver *comedi_driver,
+				     struct pcmcia_driver *pcmcia_driver)
+{
+	pcmcia_unregister_driver(pcmcia_driver);
+	comedi_driver_unregister(comedi_driver);
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_driver_unregister);