1 files changed, 123 insertions, 0 deletions
diff --git a/include/linux/logic_pio.h b/include/linux/logic_pio.h
new file mode 100644
index 000000000000..cbd9d8495690
--- /dev/null
+++ b/include/linux/logic_pio.h
@@ -0,0 +1,123 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017 HiSilicon Limited, All Rights Reserved.
+ * Author: Gabriele Paoloni <gabriele.paoloni@huawei.com>
+ * Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
+ */
+
+#ifndef __LINUX_LOGIC_PIO_H
+#define __LINUX_LOGIC_PIO_H
+
+#include <linux/fwnode.h>
+
+enum {
+	LOGIC_PIO_INDIRECT,		/* Indirect IO flag */
+	LOGIC_PIO_CPU_MMIO,		/* Memory-mapped IO flag */
+};
+
+struct logic_pio_hwaddr {
+	struct list_head list;
+	struct fwnode_handle *fwnode;
+	resource_size_t hw_start;
+	resource_size_t io_start;
+	resource_size_t size; /* range size populated */
+	unsigned long flags;
+
+	void *hostdata;
+	const struct logic_pio_host_ops *ops;
+};
+
+struct logic_pio_host_ops {
+	u32 (*in)(void *hostdata, unsigned long addr, size_t dwidth);
+	void (*out)(void *hostdata, unsigned long addr, u32 val,
+		    size_t dwidth);
+	u32 (*ins)(void *hostdata, unsigned long addr, void *buffer,
+		   size_t dwidth, unsigned int count);
+	void (*outs)(void *hostdata, unsigned long addr, const void *buffer,
+		     size_t dwidth, unsigned int count);
+};
+
+#ifdef CONFIG_INDIRECT_PIO
+u8 logic_inb(unsigned long addr);
+void logic_outb(u8 value, unsigned long addr);
+void logic_outw(u16 value, unsigned long addr);
+void logic_outl(u32 value, unsigned long addr);
+u16 logic_inw(unsigned long addr);
+u32 logic_inl(unsigned long addr);
+void logic_outb(u8 value, unsigned long addr);
+void logic_outw(u16 value, unsigned long addr);
+void logic_outl(u32 value, unsigned long addr);
+void logic_insb(unsigned long addr, void *buffer, unsigned int count);
+void logic_insl(unsigned long addr, void *buffer, unsigned int count);
+void logic_insw(unsigned long addr, void *buffer, unsigned int count);
+void logic_outsb(unsigned long addr, const void *buffer, unsigned int count);
+void logic_outsw(unsigned long addr, const void *buffer, unsigned int count);
+void logic_outsl(unsigned long addr, const void *buffer, unsigned int count);
+
+#ifndef inb
+#define inb logic_inb
+#endif
+
+#ifndef inw
+#define inw logic_inw
+#endif
+
+#ifndef inl
+#define inl logic_inl
+#endif
+
+#ifndef outb
+#define outb logic_outb
+#endif
+
+#ifndef outw
+#define outw logic_outw
+#endif
+
+#ifndef outl
+#define outl logic_outl
+#endif
+
+#ifndef insb
+#define insb logic_insb
+#endif
+
+#ifndef insw
+#define insw logic_insw
+#endif
+
+#ifndef insl
+#define insl logic_insl
+#endif
+
+#ifndef outsb
+#define outsb logic_outsb
+#endif
+
+#ifndef outsw
+#define outsw logic_outsw
+#endif
+
+#ifndef outsl
+#define outsl logic_outsl
+#endif
+
+/*
+ * We reserve 0x4000 bytes for Indirect IO as so far this library is only
+ * used by the HiSilicon LPC Host. If needed, we can reserve a wider IO
+ * area by redefining the macro below.
+ */
+#define PIO_INDIRECT_SIZE 0x4000
+#define MMIO_UPPER_LIMIT (IO_SPACE_LIMIT - PIO_INDIRECT_SIZE)
+#else
+#define MMIO_UPPER_LIMIT IO_SPACE_LIMIT
+#endif /* CONFIG_INDIRECT_PIO */
+
+struct logic_pio_hwaddr *find_io_range_by_fwnode(struct fwnode_handle *fwnode);
+unsigned long logic_pio_trans_hwaddr(struct fwnode_handle *fwnode,
+			resource_size_t hw_addr, resource_size_t size);
+int logic_pio_register_range(struct logic_pio_hwaddr *newrange);
+resource_size_t logic_pio_to_hwaddr(unsigned long pio);
+unsigned long logic_pio_trans_cpuaddr(resource_size_t hw_addr);
+
+#endif /* __LINUX_LOGIC_PIO_H */