Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 297 insertions, 0 deletions

diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
new file mode 100644
index 000000000..a6bf34d63
--- /dev/null
+++ b/drivers/base/regmap/internal.h
@@ -0,0 +1,297 @@
+/*
+ * Register map access API internal header
+ *
+ * Copyright 2011 Wolfson Microelectronics plc
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _REGMAP_INTERNAL_H
+#define _REGMAP_INTERNAL_H
+
+#include <linux/device.h>
+#include <linux/regmap.h>
+#include <linux/fs.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+
+struct regmap;
+struct regcache_ops;
+
+struct regmap_debugfs_off_cache {
+	struct list_head list;
+	off_t min;
+	off_t max;
+	unsigned int base_reg;
+	unsigned int max_reg;
+};
+
+struct regmap_format {
+	size_t buf_size;
+	size_t reg_bytes;
+	size_t pad_bytes;
+	size_t val_bytes;
+	void (*format_write)(struct regmap *map,
+			     unsigned int reg, unsigned int val);
+	void (*format_reg)(void *buf, unsigned int reg, unsigned int shift);
+	void (*format_val)(void *buf, unsigned int val, unsigned int shift);
+	unsigned int (*parse_val)(const void *buf);
+	void (*parse_inplace)(void *buf);
+};
+
+struct regmap_async {
+	struct list_head list;
+	struct regmap *map;
+	void *work_buf;
+};
+
+struct regmap {
+	union {
+		struct mutex mutex;
+		struct {
+			spinlock_t spinlock;
+			unsigned long spinlock_flags;
+		};
+	};
+	regmap_lock lock;
+	regmap_unlock unlock;
+	void *lock_arg; /* This is passed to lock/unlock functions */
+	gfp_t alloc_flags;
+
+	struct device *dev; /* Device we do I/O on */
+	void *work_buf;     /* Scratch buffer used to format I/O */
+	struct regmap_format format;  /* Buffer format */
+	const struct regmap_bus *bus;
+	void *bus_context;
+	const char *name;
+
+	bool async;
+	spinlock_t async_lock;
+	wait_queue_head_t async_waitq;
+	struct list_head async_list;
+	struct list_head async_free;
+	int async_ret;
+
+#ifdef CONFIG_DEBUG_FS
+	bool debugfs_disable;
+	struct dentry *debugfs;
+	const char *debugfs_name;
+
+	unsigned int debugfs_reg_len;
+	unsigned int debugfs_val_len;
+	unsigned int debugfs_tot_len;
+
+	struct list_head debugfs_off_cache;
+	struct mutex cache_lock;
+#endif
+
+	unsigned int max_register;
+	bool (*writeable_reg)(struct device *dev, unsigned int reg);
+	bool (*readable_reg)(struct device *dev, unsigned int reg);
+	bool (*volatile_reg)(struct device *dev, unsigned int reg);
+	bool (*precious_reg)(struct device *dev, unsigned int reg);
+	bool (*readable_noinc_reg)(struct device *dev, unsigned int reg);
+	const struct regmap_access_table *wr_table;
+	const struct regmap_access_table *rd_table;
+	const struct regmap_access_table *volatile_table;
+	const struct regmap_access_table *precious_table;
+	const struct regmap_access_table *rd_noinc_table;
+
+	int (*reg_read)(void *context, unsigned int reg, unsigned int *val);
+	int (*reg_write)(void *context, unsigned int reg, unsigned int val);
+	int (*reg_update_bits)(void *context, unsigned int reg,
+			       unsigned int mask, unsigned int val);
+
+	bool defer_caching;
+
+	unsigned long read_flag_mask;
+	unsigned long write_flag_mask;
+
+	/* number of bits to (left) shift the reg value when formatting*/
+	int reg_shift;
+	int reg_stride;
+	int reg_stride_order;
+
+	/* regcache specific members */
+	const struct regcache_ops *cache_ops;
+	enum regcache_type cache_type;
+
+	/* number of bytes in reg_defaults_raw */
+	unsigned int cache_size_raw;
+	/* number of bytes per word in reg_defaults_raw */
+	unsigned int cache_word_size;
+	/* number of entries in reg_defaults */
+	unsigned int num_reg_defaults;
+	/* number of entries in reg_defaults_raw */
+	unsigned int num_reg_defaults_raw;
+
+	/* if set, only the cache is modified not the HW */
+	bool cache_only;
+	/* if set, only the HW is modified not the cache */
+	bool cache_bypass;
+	/* if set, remember to free reg_defaults_raw */
+	bool cache_free;
+
+	struct reg_default *reg_defaults;
+	const void *reg_defaults_raw;
+	void *cache;
+	/* if set, the cache contains newer data than the HW */
+	bool cache_dirty;
+	/* if set, the HW registers are known to match map->reg_defaults */
+	bool no_sync_defaults;
+
+	struct reg_sequence *patch;
+	int patch_regs;
+
+	/* if set, converts bulk read to single read */
+	bool use_single_read;
+	/* if set, converts bulk read to single read */
+	bool use_single_write;
+	/* if set, the device supports multi write mode */
+	bool can_multi_write;
+
+	/* if set, raw reads/writes are limited to this size */
+	size_t max_raw_read;
+	size_t max_raw_write;
+
+	struct rb_root range_tree;
+	void *selector_work_buf;	/* Scratch buffer used for selector */
+
+	struct hwspinlock *hwlock;
+};
+
+struct regcache_ops {
+	const char *name;
+	enum regcache_type type;
+	int (*init)(struct regmap *map);
+	int (*exit)(struct regmap *map);
+#ifdef CONFIG_DEBUG_FS
+	void (*debugfs_init)(struct regmap *map);
+#endif
+	int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
+	int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
+	int (*sync)(struct regmap *map, unsigned int min, unsigned int max);
+	int (*drop)(struct regmap *map, unsigned int min, unsigned int max);
+};
+
+bool regmap_cached(struct regmap *map, unsigned int reg);
+bool regmap_writeable(struct regmap *map, unsigned int reg);
+bool regmap_readable(struct regmap *map, unsigned int reg);
+bool regmap_volatile(struct regmap *map, unsigned int reg);
+bool regmap_precious(struct regmap *map, unsigned int reg);
+bool regmap_readable_noinc(struct regmap *map, unsigned int reg);
+
+int _regmap_write(struct regmap *map, unsigned int reg,
+		  unsigned int val);
+
+struct regmap_range_node {
+	struct rb_node node;
+	const char *name;
+	struct regmap *map;
+
+	unsigned int range_min;
+	unsigned int range_max;
+
+	unsigned int selector_reg;
+	unsigned int selector_mask;
+	int selector_shift;
+
+	unsigned int window_start;
+	unsigned int window_len;
+};
+
+struct regmap_field {
+	struct regmap *regmap;
+	unsigned int mask;
+	/* lsb */
+	unsigned int shift;
+	unsigned int reg;
+
+	unsigned int id_size;
+	unsigned int id_offset;
+};
+
+#ifdef CONFIG_DEBUG_FS
+extern void regmap_debugfs_initcall(void);
+extern void regmap_debugfs_init(struct regmap *map, const char *name);
+extern void regmap_debugfs_exit(struct regmap *map);
+
+static inline void regmap_debugfs_disable(struct regmap *map)
+{
+	map->debugfs_disable = true;
+}
+
+#else
+static inline void regmap_debugfs_initcall(void) { }
+static inline void regmap_debugfs_init(struct regmap *map, const char *name) { }
+static inline void regmap_debugfs_exit(struct regmap *map) { }
+static inline void regmap_debugfs_disable(struct regmap *map) { }
+#endif
+
+/* regcache core declarations */
+int regcache_init(struct regmap *map, const struct regmap_config *config);
+void regcache_exit(struct regmap *map);
+int regcache_read(struct regmap *map,
+		       unsigned int reg, unsigned int *value);
+int regcache_write(struct regmap *map,
+			unsigned int reg, unsigned int value);
+int regcache_sync(struct regmap *map);
+int regcache_sync_block(struct regmap *map, void *block,
+			unsigned long *cache_present,
+			unsigned int block_base, unsigned int start,
+			unsigned int end);
+
+static inline const void *regcache_get_val_addr(struct regmap *map,
+						const void *base,
+						unsigned int idx)
+{
+	return base + (map->cache_word_size * idx);
+}
+
+unsigned int regcache_get_val(struct regmap *map, const void *base,
+			      unsigned int idx);
+bool regcache_set_val(struct regmap *map, void *base, unsigned int idx,
+		      unsigned int val);
+int regcache_lookup_reg(struct regmap *map, unsigned int reg);
+
+int _regmap_raw_write(struct regmap *map, unsigned int reg,
+		      const void *val, size_t val_len);
+
+void regmap_async_complete_cb(struct regmap_async *async, int ret);
+
+enum regmap_endian regmap_get_val_endian(struct device *dev,
+					 const struct regmap_bus *bus,
+					 const struct regmap_config *config);
+
+extern struct regcache_ops regcache_rbtree_ops;
+extern struct regcache_ops regcache_lzo_ops;
+extern struct regcache_ops regcache_flat_ops;
+
+static inline const char *regmap_name(const struct regmap *map)
+{
+	if (map->dev)
+		return dev_name(map->dev);
+
+	return map->name;
+}
+
+static inline unsigned int regmap_get_offset(const struct regmap *map,
+					     unsigned int index)
+{
+	if (map->reg_stride_order >= 0)
+		return index << map->reg_stride_order;
+	else
+		return index * map->reg_stride;
+}
+
+static inline unsigned int regcache_get_index_by_order(const struct regmap *map,
+						       unsigned int reg)
+{
+	return reg >> map->reg_stride_order;
+}
+
+#endif