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-rw-r--r--roms/u-boot/drivers/core/regmap.c688
1 files changed, 688 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/core/regmap.c b/roms/u-boot/drivers/core/regmap.c
new file mode 100644
index 000000000..3206f3d11
--- /dev/null
+++ b/roms/u-boot/drivers/core/regmap.c
@@ -0,0 +1,688 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <log.h>
+#include <asm/global_data.h>
+#include <linux/libfdt.h>
+#include <malloc.h>
+#include <mapmem.h>
+#include <regmap.h>
+#include <asm/io.h>
+#include <dm/of_addr.h>
+#include <dm/devres.h>
+#include <linux/ioport.h>
+#include <linux/compat.h>
+#include <linux/err.h>
+#include <linux/bitops.h>
+
+/*
+ * Internal representation of a regmap field. Instead of storing the MSB and
+ * LSB, store the shift and mask. This makes the code a bit cleaner and faster
+ * because the shift and mask don't have to be calculated every time.
+ */
+struct regmap_field {
+ struct regmap *regmap;
+ unsigned int mask;
+ /* lsb */
+ unsigned int shift;
+ unsigned int reg;
+};
+
+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.
+ *
+ * The default regmap width is set to REGMAP_SIZE_32. Callers can override it
+ * if they need.
+ *
+ * Return: A pointer to the newly allocated regmap, or NULL on error.
+ */
+static struct regmap *regmap_alloc(int count)
+{
+ struct regmap *map;
+ size_t size = sizeof(*map) + sizeof(map->ranges[0]) * count;
+
+ map = calloc(1, size);
+ if (!map)
+ return NULL;
+ map->range_count = count;
+ map->width = REGMAP_SIZE_32;
+
+ return map;
+}
+
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+int regmap_init_mem_plat(struct udevice *dev, fdt_val_t *reg, int count,
+ struct regmap **mapp)
+{
+ struct regmap_range *range;
+ struct regmap *map;
+
+ map = regmap_alloc(count);
+ if (!map)
+ return -ENOMEM;
+
+ for (range = map->ranges; count > 0; reg += 2, range++, count--) {
+ range->start = *reg;
+ range->size = reg[1];
+ }
+
+ *mapp = map;
+
+ 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_index(ofnode node, struct regmap **mapp, int index)
+{
+ struct regmap *map;
+ int addr_len, size_len;
+ int ret;
+
+ 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;
+ }
+
+ map = regmap_alloc(1);
+ if (!map)
+ return -ENOMEM;
+
+ ret = init_range(node, map->ranges, addr_len, size_len, index);
+ if (ret)
+ goto err;
+
+ 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;
+err:
+ regmap_uninit(map);
+
+ return ret;
+}
+
+int regmap_init_mem_range(ofnode node, ulong r_start, ulong r_size,
+ struct regmap **mapp)
+{
+ struct regmap *map;
+ struct regmap_range *range;
+
+ map = regmap_alloc(1);
+ if (!map)
+ return -ENOMEM;
+
+ range = &map->ranges[0];
+ range->start = r_start;
+ range->size = r_size;
+
+ 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;
+}
+
+int regmap_init_mem(ofnode node, struct regmap **mapp)
+{
+ struct regmap_range *range;
+ struct regmap *map;
+ int count;
+ int addr_len, size_len, both_len;
+ int len;
+ int index;
+ int ret;
+
+ 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) {
+ 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) {
+ debug("%s: Not enough data in reg property\n",
+ ofnode_get_name(node));
+ return -EINVAL;
+ }
+
+ map = regmap_alloc(count);
+ if (!map)
+ return -ENOMEM;
+
+ for (range = map->ranges, index = 0; count > 0;
+ count--, range++, index++) {
+ ret = init_range(node, range, addr_len, size_len, index);
+ if (ret)
+ goto err;
+ }
+
+ 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;
+err:
+ regmap_uninit(map);
+
+ return ret;
+}
+
+static void devm_regmap_release(struct udevice *dev, void *res)
+{
+ regmap_uninit(*(struct regmap **)res);
+}
+
+struct regmap *devm_regmap_init(struct udevice *dev,
+ const struct regmap_bus *bus,
+ void *bus_context,
+ const struct regmap_config *config)
+{
+ int rc;
+ struct regmap **mapp, *map;
+
+ mapp = devres_alloc(devm_regmap_release, sizeof(struct regmap *),
+ __GFP_ZERO);
+ if (unlikely(!mapp))
+ return ERR_PTR(-ENOMEM);
+
+ if (config && config->r_size != 0)
+ rc = regmap_init_mem_range(dev_ofnode(dev), config->r_start,
+ config->r_size, mapp);
+ else
+ rc = regmap_init_mem(dev_ofnode(dev), mapp);
+ if (rc)
+ return ERR_PTR(rc);
+
+ map = *mapp;
+ if (config) {
+ map->width = config->width;
+ map->reg_offset_shift = config->reg_offset_shift;
+ }
+
+ devres_add(dev, mapp);
+ return *mapp;
+}
+#endif
+
+void *regmap_get_range(struct regmap *map, unsigned int range_num)
+{
+ struct regmap_range *range;
+
+ if (range_num >= map->range_count)
+ return NULL;
+ range = &map->ranges[range_num];
+
+ return map_sysmem(range->start, range->size);
+}
+
+int regmap_uninit(struct regmap *map)
+{
+ free(map);
+
+ return 0;
+}
+
+static inline u8 __read_8(u8 *addr, enum regmap_endianness_t endianness)
+{
+ return readb(addr);
+}
+
+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];
+
+ offset <<= map->reg_offset_shift;
+ if (offset + val_len > range->size) {
+ debug("%s: offset/size combination invalid\n", __func__);
+ return -ERANGE;
+ }
+
+ ptr = map_physmem(range->start + offset, val_len, MAP_NOCACHE);
+
+ 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_raw_read(struct regmap *map, uint offset, void *valp, size_t val_len)
+{
+ return regmap_raw_read_range(map, 0, offset, valp, val_len);
+}
+
+int regmap_read(struct regmap *map, uint offset, uint *valp)
+{
+ union {
+ u8 v8;
+ u16 v16;
+ u32 v32;
+ u64 v64;
+ } u;
+ int res;
+
+ res = regmap_raw_read(map, offset, &u, map->width);
+ if (res)
+ return res;
+
+ switch (map->width) {
+ case REGMAP_SIZE_8:
+ *valp = u.v8;
+ break;
+ case REGMAP_SIZE_16:
+ *valp = u.v16;
+ break;
+ case REGMAP_SIZE_32:
+ *valp = u.v32;
+ break;
+ case REGMAP_SIZE_64:
+ *valp = u.v64;
+ break;
+ default:
+ unreachable();
+ }
+
+ return 0;
+}
+
+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];
+
+ offset <<= map->reg_offset_shift;
+ if (offset + val_len > range->size) {
+ debug("%s: offset/size combination invalid\n", __func__);
+ return -ERANGE;
+ }
+
+ ptr = map_physmem(range->start + offset, val_len, MAP_NOCACHE);
+
+ 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)
+{
+ union {
+ u8 v8;
+ u16 v16;
+ u32 v32;
+ u64 v64;
+ } u;
+
+ switch (map->width) {
+ case REGMAP_SIZE_8:
+ u.v8 = val;
+ break;
+ case REGMAP_SIZE_16:
+ u.v16 = val;
+ break;
+ case REGMAP_SIZE_32:
+ u.v32 = val;
+ break;
+ case REGMAP_SIZE_64:
+ u.v64 = val;
+ break;
+ default:
+ debug("%s: regmap size %zu unknown\n", __func__,
+ (size_t)map->width);
+ return -EINVAL;
+ }
+
+ return regmap_raw_write(map, offset, &u, map->width);
+}
+
+int regmap_update_bits(struct regmap *map, uint offset, uint mask, uint val)
+{
+ uint reg;
+ int ret;
+
+ ret = regmap_read(map, offset, &reg);
+ if (ret)
+ return ret;
+
+ reg &= ~mask;
+
+ return regmap_write(map, offset, reg | (val & mask));
+}
+
+int regmap_field_read(struct regmap_field *field, unsigned int *val)
+{
+ int ret;
+ unsigned int reg_val;
+
+ ret = regmap_read(field->regmap, field->reg, &reg_val);
+ if (ret != 0)
+ return ret;
+
+ reg_val &= field->mask;
+ reg_val >>= field->shift;
+ *val = reg_val;
+
+ return ret;
+}
+
+int regmap_field_write(struct regmap_field *field, unsigned int val)
+{
+ return regmap_update_bits(field->regmap, field->reg, field->mask,
+ val << field->shift);
+}
+
+static void regmap_field_init(struct regmap_field *rm_field,
+ struct regmap *regmap,
+ struct reg_field reg_field)
+{
+ rm_field->regmap = regmap;
+ rm_field->reg = reg_field.reg;
+ rm_field->shift = reg_field.lsb;
+ rm_field->mask = GENMASK(reg_field.msb, reg_field.lsb);
+}
+
+struct regmap_field *devm_regmap_field_alloc(struct udevice *dev,
+ struct regmap *regmap,
+ struct reg_field reg_field)
+{
+ struct regmap_field *rm_field = devm_kzalloc(dev, sizeof(*rm_field),
+ GFP_KERNEL);
+ if (!rm_field)
+ return ERR_PTR(-ENOMEM);
+
+ regmap_field_init(rm_field, regmap, reg_field);
+
+ return rm_field;
+}
+
+void devm_regmap_field_free(struct udevice *dev, struct regmap_field *field)
+{
+ devm_kfree(dev, field);
+}
+
+struct regmap_field *regmap_field_alloc(struct regmap *regmap,
+ struct reg_field reg_field)
+{
+ struct regmap_field *rm_field = kzalloc(sizeof(*rm_field), GFP_KERNEL);
+
+ if (!rm_field)
+ return ERR_PTR(-ENOMEM);
+
+ regmap_field_init(rm_field, regmap, reg_field);
+
+ return rm_field;
+}
+
+void regmap_field_free(struct regmap_field *field)
+{
+ kfree(field);
+}