drivers: add support for the TI VLYNQ bus

Add support for the TI VLYNQ high-speed, serial and packetized bus.

This bus allows external devices to be connected to the System-on-Chip and
appear in the main system memory just like any memory mapped peripheral.
It is widely used in TI's networking and multimedia SoC, including the AR7
SoC.

Signed-off-by: Eugene Konev <ejka@imfi.kspu.ru>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 161 insertions, 0 deletions

diff --git a/include/linux/vlynq.h b/include/linux/vlynq.h
new file mode 100644
index 00000000000..8f6a95882b0
--- /dev/null
+++ b/include/linux/vlynq.h
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2006, 2007 Eugene Konev <ejka@openwrt.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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef __VLYNQ_H__
+#define __VLYNQ_H__
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/types.h>
+
+#define VLYNQ_NUM_IRQS 32
+
+struct vlynq_mapping {
+	u32 size;
+	u32 offset;
+};
+
+enum vlynq_divisor {
+	vlynq_div_auto = 0,
+	vlynq_ldiv1,
+	vlynq_ldiv2,
+	vlynq_ldiv3,
+	vlynq_ldiv4,
+	vlynq_ldiv5,
+	vlynq_ldiv6,
+	vlynq_ldiv7,
+	vlynq_ldiv8,
+	vlynq_rdiv1,
+	vlynq_rdiv2,
+	vlynq_rdiv3,
+	vlynq_rdiv4,
+	vlynq_rdiv5,
+	vlynq_rdiv6,
+	vlynq_rdiv7,
+	vlynq_rdiv8,
+	vlynq_div_external
+};
+
+struct vlynq_device_id {
+	u32 id;
+	enum vlynq_divisor divisor;
+	unsigned long driver_data;
+};
+
+struct vlynq_regs;
+struct vlynq_device {
+	u32 id, dev_id;
+	int local_irq;
+	int remote_irq;
+	enum vlynq_divisor divisor;
+	u32 regs_start, regs_end;
+	u32 mem_start, mem_end;
+	u32 irq_start, irq_end;
+	int irq;
+	int enabled;
+	struct vlynq_regs *local;
+	struct vlynq_regs *remote;
+	struct device dev;
+};
+
+struct vlynq_driver {
+	char *name;
+	struct vlynq_device_id *id_table;
+	int (*probe)(struct vlynq_device *dev, struct vlynq_device_id *id);
+	void (*remove)(struct vlynq_device *dev);
+	struct device_driver driver;
+};
+
+struct plat_vlynq_ops {
+	int (*on)(struct vlynq_device *dev);
+	void (*off)(struct vlynq_device *dev);
+};
+
+static inline struct vlynq_driver *to_vlynq_driver(struct device_driver *drv)
+{
+	return container_of(drv, struct vlynq_driver, driver);
+}
+
+static inline struct vlynq_device *to_vlynq_device(struct device *device)
+{
+	return container_of(device, struct vlynq_device, dev);
+}
+
+extern struct bus_type vlynq_bus_type;
+
+extern int __vlynq_register_driver(struct vlynq_driver *driver,
+				   struct module *owner);
+
+static inline int vlynq_register_driver(struct vlynq_driver *driver)
+{
+	return __vlynq_register_driver(driver, THIS_MODULE);
+}
+
+static inline void *vlynq_get_drvdata(struct vlynq_device *dev)
+{
+	return dev_get_drvdata(&dev->dev);
+}
+
+static inline void vlynq_set_drvdata(struct vlynq_device *dev, void *data)
+{
+	dev_set_drvdata(&dev->dev, data);
+}
+
+static inline u32 vlynq_mem_start(struct vlynq_device *dev)
+{
+	return dev->mem_start;
+}
+
+static inline u32 vlynq_mem_end(struct vlynq_device *dev)
+{
+	return dev->mem_end;
+}
+
+static inline u32 vlynq_mem_len(struct vlynq_device *dev)
+{
+	return dev->mem_end - dev->mem_start + 1;
+}
+
+static inline int vlynq_virq_to_irq(struct vlynq_device *dev, int virq)
+{
+	int irq = dev->irq_start + virq;
+	if ((irq < dev->irq_start) || (irq > dev->irq_end))
+		return -EINVAL;
+
+	return irq;
+}
+
+static inline int vlynq_irq_to_virq(struct vlynq_device *dev, int irq)
+{
+	if ((irq < dev->irq_start) || (irq > dev->irq_end))
+		return -EINVAL;
+
+	return irq - dev->irq_start;
+}
+
+extern void vlynq_unregister_driver(struct vlynq_driver *driver);
+extern int vlynq_enable_device(struct vlynq_device *dev);
+extern void vlynq_disable_device(struct vlynq_device *dev);
+extern int vlynq_set_local_mapping(struct vlynq_device *dev, u32 tx_offset,
+				   struct vlynq_mapping *mapping);
+extern int vlynq_set_remote_mapping(struct vlynq_device *dev, u32 tx_offset,
+				    struct vlynq_mapping *mapping);
+extern int vlynq_set_local_irq(struct vlynq_device *dev, int virq);
+extern int vlynq_set_remote_irq(struct vlynq_device *dev, int virq);
+
+#endif /* __VLYNQ_H__ */