Merge with /home/wd/git/u-boot/mailing-list/Haavard_Skinnemoen

1 files changed, 126 insertions, 0 deletions

diff --git a/cpu/at32ap/device.c b/cpu/at32ap/device.c
new file mode 100644
index 0000000..89914b6
--- /dev/null
+++ b/cpu/at32ap/device.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2006 Atmel Corporation
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <common.h>
+
+#include <asm/arch/platform.h>
+
+#include "sm.h"
+
+struct device_state {
+	int refcount;
+};
+
+static struct device_state device_state[NR_DEVICES];
+
+static int claim_resource(const struct resource *res)
+{
+	int ret = 0;
+
+	switch (res->type) {
+	case RESOURCE_GPIO:
+		ret = gpio_set_func(res->u.gpio.gpio_dev,
+				    res->u.gpio.start,
+				    res->u.gpio.nr_pins,
+				    res->u.gpio.func);
+		break;
+	case RESOURCE_CLOCK:
+		ret = pm_enable_clock(res->u.clock.id, res->u.clock.index);
+		break;
+	}
+
+	return ret;
+}
+
+static void free_resource(const struct resource *res)
+{
+	switch (res->type) {
+	case RESOURCE_GPIO:
+		gpio_free(res->u.gpio.gpio_dev, res->u.gpio.start,
+			  res->u.gpio.nr_pins);
+		break;
+	case RESOURCE_CLOCK:
+		pm_disable_clock(res->u.clock.id, res->u.clock.index);
+		break;
+	}
+}
+
+static int init_dev(const struct device *dev)
+{
+	unsigned int i;
+	int ret = 0;
+
+	for (i = 0; i < dev->nr_resources; i++) {
+		ret = claim_resource(&dev->resource[i]);
+		if (ret)
+			goto cleanup;
+	}
+
+	return 0;
+
+cleanup:
+	while (i--)
+		free_resource(&dev->resource[i]);
+
+	return ret;
+}
+
+const struct device *get_device(enum device_id devid)
+{
+	struct device_state *devstate;
+	const struct device *dev;
+	unsigned long flags;
+	int initialized = 0;
+	int ret = 0;
+
+	devstate = &device_state[devid];
+	dev = &chip_device[devid];
+
+	flags = disable_interrupts();
+	if (devstate->refcount++)
+		initialized = 1;
+	if (flags)
+		enable_interrupts();
+
+	if (!initialized)
+		ret = init_dev(dev);
+
+	return ret ? NULL : dev;
+}
+
+void put_device(const struct device *dev)
+{
+	struct device_state *devstate;
+	unsigned long devid, flags;
+
+	devid = (unsigned long)(dev - chip_device) / sizeof(struct device);
+	devstate = &device_state[devid];
+
+	flags = disable_interrupts();
+	devstate--;
+	if (!devstate) {
+		unsigned int i;
+		for (i = 0; i < dev->nr_resources; i++)
+			free_resource(&dev->resource[i]);
+	}
+	if (flags)
+		enable_interrupts();
+}