Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 190 insertions, 0 deletions

diff --git a/drivers/media/video/bttv-gpio.c b/drivers/media/video/bttv-gpio.c
new file mode 100644
index 00000000000..77320cdf205
--- /dev/null
+++ b/drivers/media/video/bttv-gpio.c
@@ -0,0 +1,190 @@
+/*
+    $Id: bttv-gpio.c,v 1.7 2005/02/16 12:14:10 kraxel Exp $
+
+    bttv-gpio.c  --  gpio sub drivers
+
+    sysfs-based sub driver interface for bttv
+    mainly intented for gpio access
+
+
+    Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
+                           & Marcus Metzler (mocm@thp.uni-koeln.de)
+    (c) 1999-2003 Gerd Knorr <kraxel@bytesex.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/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <asm/io.h>
+
+#include "bttvp.h"
+
+/* ----------------------------------------------------------------------- */
+/* internal: the bttv "bus"                                                */
+
+static int bttv_sub_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct bttv_sub_driver *sub = to_bttv_sub_drv(drv);
+	int len = strlen(sub->wanted);
+
+	if (0 == strncmp(dev->bus_id, sub->wanted, len))
+		return 1;
+	return 0;
+}
+
+struct bus_type bttv_sub_bus_type = {
+	.name  = "bttv-sub",
+	.match = &bttv_sub_bus_match,
+};
+EXPORT_SYMBOL(bttv_sub_bus_type);
+
+static void release_sub_device(struct device *dev)
+{
+	struct bttv_sub_device *sub = to_bttv_sub_dev(dev);
+	kfree(sub);
+}
+
+int bttv_sub_add_device(struct bttv_core *core, char *name)
+{
+	struct bttv_sub_device *sub;
+	int err;
+
+	sub = kmalloc(sizeof(*sub),GFP_KERNEL);
+	if (NULL == sub)
+		return -ENOMEM;
+	memset(sub,0,sizeof(*sub));
+
+	sub->core        = core;
+	sub->dev.parent  = &core->pci->dev;
+	sub->dev.bus     = &bttv_sub_bus_type;
+	sub->dev.release = release_sub_device;
+	snprintf(sub->dev.bus_id,sizeof(sub->dev.bus_id),"%s%d",
+		 name, core->nr);
+
+	err = device_register(&sub->dev);
+	if (0 != err) {
+		kfree(sub);
+		return err;
+	}
+	printk("bttv%d: add subdevice \"%s\"\n", core->nr, sub->dev.bus_id);
+	list_add_tail(&sub->list,&core->subs);
+	return 0;
+}
+
+int bttv_sub_del_devices(struct bttv_core *core)
+{
+	struct bttv_sub_device *sub;
+	struct list_head *item,*save;
+
+	list_for_each_safe(item,save,&core->subs) {
+		sub = list_entry(item,struct bttv_sub_device,list);
+		list_del(&sub->list);
+		device_unregister(&sub->dev);
+	}
+	return 0;
+}
+
+void bttv_gpio_irq(struct bttv_core *core)
+{
+	struct bttv_sub_driver *drv;
+	struct bttv_sub_device *dev;
+	struct list_head *item;
+
+	list_for_each(item,&core->subs) {
+		dev = list_entry(item,struct bttv_sub_device,list);
+		drv = to_bttv_sub_drv(dev->dev.driver);
+		if (drv && drv->gpio_irq)
+			drv->gpio_irq(dev);
+	}
+}
+
+/* ----------------------------------------------------------------------- */
+/* external: sub-driver register/unregister                                */
+
+int bttv_sub_register(struct bttv_sub_driver *sub, char *wanted)
+{
+	sub->drv.bus = &bttv_sub_bus_type;
+	snprintf(sub->wanted,sizeof(sub->wanted),"%s",wanted);
+	return driver_register(&sub->drv);
+}
+EXPORT_SYMBOL(bttv_sub_register);
+
+int bttv_sub_unregister(struct bttv_sub_driver *sub)
+{
+	driver_unregister(&sub->drv);
+	return 0;
+}
+EXPORT_SYMBOL(bttv_sub_unregister);
+
+/* ----------------------------------------------------------------------- */
+/* external: gpio access functions                                         */
+
+void bttv_gpio_inout(struct bttv_core *core, u32 mask, u32 outbits)
+{
+	struct bttv *btv = container_of(core, struct bttv, c);
+	unsigned long flags;
+	u32 data;
+
+	spin_lock_irqsave(&btv->gpio_lock,flags);
+	data = btread(BT848_GPIO_OUT_EN);
+	data = data & ~mask;
+	data = data | (mask & outbits);
+	btwrite(data,BT848_GPIO_OUT_EN);
+	spin_unlock_irqrestore(&btv->gpio_lock,flags);
+}
+EXPORT_SYMBOL(bttv_gpio_inout);
+
+u32 bttv_gpio_read(struct bttv_core *core)
+{
+	struct bttv *btv = container_of(core, struct bttv, c);
+	u32 value;
+
+	value = btread(BT848_GPIO_DATA);
+	return value;
+}
+EXPORT_SYMBOL(bttv_gpio_read);
+
+void bttv_gpio_write(struct bttv_core *core, u32 value)
+{
+	struct bttv *btv = container_of(core, struct bttv, c);
+
+	btwrite(value,BT848_GPIO_DATA);
+}
+EXPORT_SYMBOL(bttv_gpio_write);
+
+void bttv_gpio_bits(struct bttv_core *core, u32 mask, u32 bits)
+{
+	struct bttv *btv = container_of(core, struct bttv, c);
+	unsigned long flags;
+	u32 data;
+
+	spin_lock_irqsave(&btv->gpio_lock,flags);
+	data = btread(BT848_GPIO_DATA);
+	data = data & ~mask;
+	data = data | (mask & bits);
+	btwrite(data,BT848_GPIO_DATA);
+	spin_unlock_irqrestore(&btv->gpio_lock,flags);
+}
+EXPORT_SYMBOL(bttv_gpio_bits);
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */