1 files changed, 103 insertions, 0 deletions
diff --git a/drivers/media/pci/bt8xx/bttv-if.c b/drivers/media/pci/bt8xx/bttv-if.c
new file mode 100644
index 0000000000..363c84bac5
--- /dev/null
+++ b/drivers/media/pci/bt8xx/bttv-if.c
@@ -0,0 +1,103 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+
+    bttv-if.c  --  old gpio interface to other kernel modules
+		   don't use in new code, will go away in 2.7
+		   have a look at bttv-gpio.c instead.
+
+    bttv - Bt848 frame grabber driver
+
+    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>
+
+
+*/
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <asm/io.h>
+
+#include "bttvp.h"
+
+EXPORT_SYMBOL(bttv_get_pcidev);
+EXPORT_SYMBOL(bttv_gpio_enable);
+EXPORT_SYMBOL(bttv_read_gpio);
+EXPORT_SYMBOL(bttv_write_gpio);
+
+/* ----------------------------------------------------------------------- */
+/* Exported functions - for other modules which want to access the         */
+/*                      gpio ports (IR for example)                        */
+/*                      see bttv.h for comments                            */
+
+struct pci_dev* bttv_get_pcidev(unsigned int card)
+{
+	if (card >= bttv_num)
+		return NULL;
+	if (!bttvs[card])
+		return NULL;
+
+	return bttvs[card]->c.pci;
+}
+
+
+int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
+{
+	struct bttv *btv;
+
+	if (card >= bttv_num) {
+		return -EINVAL;
+	}
+
+	btv = bttvs[card];
+	if (!btv)
+		return -ENODEV;
+
+	gpio_inout(mask,data);
+	if (bttv_gpio)
+		bttv_gpio_tracking(btv,"extern enable");
+	return 0;
+}
+
+int bttv_read_gpio(unsigned int card, unsigned long *data)
+{
+	struct bttv *btv;
+
+	if (card >= bttv_num) {
+		return -EINVAL;
+	}
+
+	btv = bttvs[card];
+	if (!btv)
+		return -ENODEV;
+
+	if(btv->shutdown) {
+		return -ENODEV;
+	}
+
+/* prior setting BT848_GPIO_REG_INP is (probably) not needed
+   because we set direct input on init */
+	*data = gpio_read();
+	return 0;
+}
+
+int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
+{
+	struct bttv *btv;
+
+	if (card >= bttv_num) {
+		return -EINVAL;
+	}
+
+	btv = bttvs[card];
+	if (!btv)
+		return -ENODEV;
+
+/* prior setting BT848_GPIO_REG_INP is (probably) not needed
+   because direct input is set on init */
+	gpio_bits(mask,data);
+	if (bttv_gpio)
+		bttv_gpio_tracking(btv,"extern write");
+	return 0;
+}