1 files changed, 296 insertions, 20 deletions

diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c
index 8e5c3bcf61..5ef0f71c8b 100644
--- a/drivers/core/regmap.c
+++ b/drivers/core/regmap.c
@@ -17,6 +17,12 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+/**
+ * regmap_alloc() - Allocate a regmap with a given number of ranges.
+ *
+ * @count: Number of ranges to be allocated for the regmap.
+ * Return: A pointer to the newly allocated regmap, or NULL on error.
+ */
 static struct regmap *regmap_alloc(int count)
 {
 	struct regmap *map;
@@ -50,6 +56,58 @@ int regmap_init_mem_platdata(struct udevice *dev, fdt_val_t *reg, int count,
 	return 0;
 }
 #else
+/**
+ * init_range() - Initialize a single range of a regmap
+ * @node:     Device node that will use the map in question
+ * @range:    Pointer to a regmap_range structure that will be initialized
+ * @addr_len: The length of the addr parts of the reg property
+ * @size_len: The length of the size parts of the reg property
+ * @index:    The index of the range to initialize
+ *
+ * This function will read the necessary 'reg' information from the device tree
+ * (the 'addr' part, and the 'length' part), and initialize the range in
+ * quesion.
+ *
+ * Return: 0 if OK, -ve on error
+ */
+static int init_range(ofnode node, struct regmap_range *range, int addr_len,
+		      int size_len, int index)
+{
+	fdt_size_t sz;
+	struct resource r;
+
+	if (of_live_active()) {
+		int ret;
+
+		ret = of_address_to_resource(ofnode_to_np(node),
+					     index, &r);
+		if (ret) {
+			debug("%s: Could not read resource of range %d (ret = %d)\n",
+			      ofnode_get_name(node), index, ret);
+			return ret;
+		}
+
+		range->start = r.start;
+		range->size = r.end - r.start + 1;
+	} else {
+		int offset = ofnode_to_offset(node);
+
+		range->start = fdtdec_get_addr_size_fixed(gd->fdt_blob, offset,
+							  "reg", index,
+							  addr_len, size_len,
+							  &sz, true);
+		if (range->start == FDT_ADDR_T_NONE) {
+			debug("%s: Could not read start of range %d\n",
+			      ofnode_get_name(node), index);
+			return -EINVAL;
+		}
+
+		range->size = sz;
+	}
+
+	return 0;
+}
+
 int regmap_init_mem(ofnode node, struct regmap **mapp)
 {
 	struct regmap_range *range;
@@ -58,19 +116,41 @@ int regmap_init_mem(ofnode node, struct regmap **mapp)
 	int addr_len, size_len, both_len;
 	int len;
 	int index;
-	struct resource r;
 
 	addr_len = ofnode_read_simple_addr_cells(ofnode_get_parent(node));
+	if (addr_len < 0) {
+		debug("%s: Error while reading the addr length (ret = %d)\n",
+		      ofnode_get_name(node), addr_len);
+		return addr_len;
+	}
+
 	size_len = ofnode_read_simple_size_cells(ofnode_get_parent(node));
+	if (size_len < 0) {
+		debug("%s: Error while reading the size length: (ret = %d)\n",
+		      ofnode_get_name(node), size_len);
+		return size_len;
+	}
+
 	both_len = addr_len + size_len;
+	if (!both_len) {
+		debug("%s: Both addr and size length are zero\n",
+		      ofnode_get_name(node));
+		return -EINVAL;
+	}
 
 	len = ofnode_read_size(node, "reg");
-	if (len < 0)
+	if (len < 0) {
+		debug("%s: Error while reading reg size (ret = %d)\n",
+		      ofnode_get_name(node), len);
 		return len;
+	}
 	len /= sizeof(fdt32_t);
 	count = len / both_len;
-	if (!count)
+	if (!count) {
+		debug("%s: Not enough data in reg property\n",
+		      ofnode_get_name(node));
 		return -EINVAL;
+	}
 
 	map = regmap_alloc(count);
 	if (!map)
@@ -78,19 +158,21 @@ int regmap_init_mem(ofnode node, struct regmap **mapp)
 
 	for (range = map->ranges, index = 0; count > 0;
 	     count--, range++, index++) {
-		fdt_size_t sz;
-		if (of_live_active()) {
-			of_address_to_resource(ofnode_to_np(node), index, &r);
-			range->start = r.start;
-			range->size = r.end - r.start + 1;
-		} else {
-			range->start = fdtdec_get_addr_size_fixed(gd->fdt_blob,
-					ofnode_to_offset(node), "reg", index,
-					addr_len, size_len, &sz, true);
-			range->size = sz;
-		}
+		int ret = init_range(node, range, addr_len, size_len, index);
+
+		if (ret)
+			return ret;
 	}
 
+	if (ofnode_read_bool(node, "little-endian"))
+		map->endianness = REGMAP_LITTLE_ENDIAN;
+	else if (ofnode_read_bool(node, "big-endian"))
+		map->endianness = REGMAP_BIG_ENDIAN;
+	else if (ofnode_read_bool(node, "native-endian"))
+		map->endianness = REGMAP_NATIVE_ENDIAN;
+	else /* Default: native endianness */
+		map->endianness = REGMAP_NATIVE_ENDIAN;
+
 	*mapp = map;
 
 	return 0;
@@ -115,24 +197,218 @@ int regmap_uninit(struct regmap *map)
 	return 0;
 }
 
-int regmap_read(struct regmap *map, uint offset, uint *valp)
+static inline u8 __read_8(u8 *addr, enum regmap_endianness_t endianness)
 {
-	u32 *ptr = map_physmem(map->ranges[0].start + offset, 4, MAP_NOCACHE);
+	return readb(addr);
+}
 
-	*valp = le32_to_cpu(readl(ptr));
+static inline u16 __read_16(u16 *addr, enum regmap_endianness_t endianness)
+{
+	switch (endianness) {
+	case REGMAP_LITTLE_ENDIAN:
+		return in_le16(addr);
+	case REGMAP_BIG_ENDIAN:
+		return in_be16(addr);
+	case REGMAP_NATIVE_ENDIAN:
+		return readw(addr);
+	}
+
+	return readw(addr);
+}
+
+static inline u32 __read_32(u32 *addr, enum regmap_endianness_t endianness)
+{
+	switch (endianness) {
+	case REGMAP_LITTLE_ENDIAN:
+		return in_le32(addr);
+	case REGMAP_BIG_ENDIAN:
+		return in_be32(addr);
+	case REGMAP_NATIVE_ENDIAN:
+		return readl(addr);
+	}
+
+	return readl(addr);
+}
+
+#if defined(in_le64) && defined(in_be64) && defined(readq)
+static inline u64 __read_64(u64 *addr, enum regmap_endianness_t endianness)
+{
+	switch (endianness) {
+	case REGMAP_LITTLE_ENDIAN:
+		return in_le64(addr);
+	case REGMAP_BIG_ENDIAN:
+		return in_be64(addr);
+	case REGMAP_NATIVE_ENDIAN:
+		return readq(addr);
+	}
+
+	return readq(addr);
+}
+#endif
+
+int regmap_raw_read_range(struct regmap *map, uint range_num, uint offset,
+			  void *valp, size_t val_len)
+{
+	struct regmap_range *range;
+	void *ptr;
+
+	if (range_num >= map->range_count) {
+		debug("%s: range index %d larger than range count\n",
+		      __func__, range_num);
+		return -ERANGE;
+	}
+	range = &map->ranges[range_num];
+
+	ptr = map_physmem(range->start + offset, val_len, MAP_NOCACHE);
+
+	if (offset + val_len > range->size) {
+		debug("%s: offset/size combination invalid\n", __func__);
+		return -ERANGE;
+	}
+
+	switch (val_len) {
+	case REGMAP_SIZE_8:
+		*((u8 *)valp) = __read_8(ptr, map->endianness);
+		break;
+	case REGMAP_SIZE_16:
+		*((u16 *)valp) = __read_16(ptr, map->endianness);
+		break;
+	case REGMAP_SIZE_32:
+		*((u32 *)valp) = __read_32(ptr, map->endianness);
+		break;
+#if defined(in_le64) && defined(in_be64) && defined(readq)
+	case REGMAP_SIZE_64:
+		*((u64 *)valp) = __read_64(ptr, map->endianness);
+		break;
+#endif
+	default:
+		debug("%s: regmap size %zu unknown\n", __func__, val_len);
+		return -EINVAL;
+	}
 
 	return 0;
 }
 
-int regmap_write(struct regmap *map, uint offset, uint val)
+int regmap_raw_read(struct regmap *map, uint offset, void *valp, size_t val_len)
 {
-	u32 *ptr = map_physmem(map->ranges[0].start + offset, 4, MAP_NOCACHE);
+	return regmap_raw_read_range(map, 0, offset, valp, val_len);
+}
 
-	writel(cpu_to_le32(val), ptr);
+int regmap_read(struct regmap *map, uint offset, uint *valp)
+{
+	return regmap_raw_read(map, offset, valp, REGMAP_SIZE_32);
+}
+
+static inline void __write_8(u8 *addr, const u8 *val,
+			     enum regmap_endianness_t endianness)
+{
+	writeb(*val, addr);
+}
+
+static inline void __write_16(u16 *addr, const u16 *val,
+			      enum regmap_endianness_t endianness)
+{
+	switch (endianness) {
+	case REGMAP_NATIVE_ENDIAN:
+		writew(*val, addr);
+		break;
+	case REGMAP_LITTLE_ENDIAN:
+		out_le16(addr, *val);
+		break;
+	case REGMAP_BIG_ENDIAN:
+		out_be16(addr, *val);
+		break;
+	}
+}
+
+static inline void __write_32(u32 *addr, const u32 *val,
+			      enum regmap_endianness_t endianness)
+{
+	switch (endianness) {
+	case REGMAP_NATIVE_ENDIAN:
+		writel(*val, addr);
+		break;
+	case REGMAP_LITTLE_ENDIAN:
+		out_le32(addr, *val);
+		break;
+	case REGMAP_BIG_ENDIAN:
+		out_be32(addr, *val);
+		break;
+	}
+}
+
+#if defined(out_le64) && defined(out_be64) && defined(writeq)
+static inline void __write_64(u64 *addr, const u64 *val,
+			      enum regmap_endianness_t endianness)
+{
+	switch (endianness) {
+	case REGMAP_NATIVE_ENDIAN:
+		writeq(*val, addr);
+		break;
+	case REGMAP_LITTLE_ENDIAN:
+		out_le64(addr, *val);
+		break;
+	case REGMAP_BIG_ENDIAN:
+		out_be64(addr, *val);
+		break;
+	}
+}
+#endif
+
+int regmap_raw_write_range(struct regmap *map, uint range_num, uint offset,
+			   const void *val, size_t val_len)
+{
+	struct regmap_range *range;
+	void *ptr;
+
+	if (range_num >= map->range_count) {
+		debug("%s: range index %d larger than range count\n",
+		      __func__, range_num);
+		return -ERANGE;
+	}
+	range = &map->ranges[range_num];
+
+	ptr = map_physmem(range->start + offset, val_len, MAP_NOCACHE);
+
+	if (offset + val_len > range->size) {
+		debug("%s: offset/size combination invalid\n", __func__);
+		return -ERANGE;
+	}
+
+	switch (val_len) {
+	case REGMAP_SIZE_8:
+		__write_8(ptr, val, map->endianness);
+		break;
+	case REGMAP_SIZE_16:
+		__write_16(ptr, val, map->endianness);
+		break;
+	case REGMAP_SIZE_32:
+		__write_32(ptr, val, map->endianness);
+		break;
+#if defined(out_le64) && defined(out_be64) && defined(writeq)
+	case REGMAP_SIZE_64:
+		__write_64(ptr, val, map->endianness);
+		break;
+#endif
+	default:
+		debug("%s: regmap size %zu unknown\n", __func__, val_len);
+		return -EINVAL;
+	}
 
 	return 0;
 }
 
+int regmap_raw_write(struct regmap *map, uint offset, const void *val,
+		     size_t val_len)
+{
+	return regmap_raw_write_range(map, 0, offset, val, val_len);
+}
+
+int regmap_write(struct regmap *map, uint offset, uint val)
+{
+	return regmap_raw_write(map, offset, &val, REGMAP_SIZE_32);
+}
+
 int regmap_update_bits(struct regmap *map, uint offset, uint mask, uint val)
 {
 	uint reg;