This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / sh / drivers / dma / dma-sysfs.c

diff --git a/arch/sh/drivers/dma/dma-sysfs.c b/arch/sh/drivers/dma/dma-sysfs.c
new file mode 100644 (file)
index 0000000..71a6d4e
--- /dev/null
+++ b/arch/sh/drivers/dma/dma-sysfs.c
@@ -0,0 +1,133 @@
+/*
+ * arch/sh/drivers/dma/dma-sysfs.c
+ *
+ * sysfs interface for SH DMA API
+ *
+ * Copyright (C) 2004  Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sysdev.h>
+#include <linux/module.h>
+#include <asm/dma.h>
+
+static struct sysdev_class dma_sysclass = {
+       set_kset_name("dma"),
+};
+
+EXPORT_SYMBOL(dma_sysclass);
+
+static ssize_t dma_show_devices(struct sys_device *dev, char *buf)
+{
+       ssize_t len = 0;
+       int i;
+
+       for (i = 0; i < MAX_DMA_CHANNELS; i++) {
+               struct dma_info *info = get_dma_info(i);
+               struct dma_channel *channel = &info->channels[i];
+
+               len += sprintf(buf + len, "%2d: %14s    %s\n",
+                              channel->chan, info->name,
+                              channel->dev_id);
+       }
+
+       return len;
+}
+
+static SYSDEV_ATTR(devices, S_IRUGO, dma_show_devices, NULL);
+
+static int __init dma_sysclass_init(void)
+{
+       int ret;
+
+       ret = sysdev_class_register(&dma_sysclass);
+       if (ret == 0)
+               sysfs_create_file(&dma_sysclass.kset.kobj, &attr_devices.attr);
+
+       return ret;
+}
+
+postcore_initcall(dma_sysclass_init);
+
+static ssize_t dma_show_dev_id(struct sys_device *dev, char *buf)
+{
+       struct dma_channel *channel = to_dma_channel(dev);
+       return sprintf(buf, "%s\n", channel->dev_id);
+}
+
+static ssize_t dma_store_dev_id(struct sys_device *dev,
+                               const char *buf, size_t count)
+{
+       struct dma_channel *channel = to_dma_channel(dev);
+       strcpy(channel->dev_id, buf);
+       return count;
+}
+
+static SYSDEV_ATTR(dev_id, S_IRUGO | S_IWUSR, dma_show_dev_id, dma_store_dev_id);
+
+static ssize_t dma_store_config(struct sys_device *dev,
+                               const char *buf, size_t count)
+{
+       struct dma_channel *channel = to_dma_channel(dev);
+       unsigned long config;
+
+       config = simple_strtoul(buf, NULL, 0);
+       dma_configure_channel(channel->chan, config);
+
+       return count;
+}
+
+static SYSDEV_ATTR(config, S_IWUSR, NULL, dma_store_config);
+
+static ssize_t dma_show_mode(struct sys_device *dev, char *buf)
+{
+       struct dma_channel *channel = to_dma_channel(dev);
+       return sprintf(buf, "0x%08x\n", channel->mode);
+}
+
+static ssize_t dma_store_mode(struct sys_device *dev,
+                             const char *buf, size_t count)
+{
+       struct dma_channel *channel = to_dma_channel(dev);
+       channel->mode = simple_strtoul(buf, NULL, 0);
+       return count;
+}
+
+static SYSDEV_ATTR(mode, S_IRUGO | S_IWUSR, dma_show_mode, dma_store_mode);
+
+#define dma_ro_attr(field, fmt)                                                \
+static ssize_t dma_show_##field(struct sys_device *dev, char *buf)     \
+{                                                                      \
+       struct dma_channel *channel = to_dma_channel(dev);              \
+       return sprintf(buf, fmt, channel->field);                       \
+}                                                                      \
+static SYSDEV_ATTR(field, S_IRUGO, dma_show_##field, NULL);
+
+dma_ro_attr(count, "0x%08x\n");
+dma_ro_attr(flags, "0x%08lx\n");
+
+int __init dma_create_sysfs_files(struct dma_channel *chan)
+{
+       struct sys_device *dev = &chan->dev;
+       int ret;
+
+       dev->id  = chan->chan;
+       dev->cls = &dma_sysclass;
+
+       ret = sysdev_register(dev);
+       if (ret)
+               return ret;
+
+       sysdev_create_file(dev, &attr_dev_id);
+       sysdev_create_file(dev, &attr_count);
+       sysdev_create_file(dev, &attr_mode);
+       sysdev_create_file(dev, &attr_flags);
+       sysdev_create_file(dev, &attr_config);
+
+       return 0;
+}
+