#include <linux/mutex.h>
#include <linux/err.h>
-#include <linux/regmap.h>
-
-struct regmap;
-
-struct regmap_format {
- size_t buf_size;
- size_t reg_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);
- void (*format_val)(void *buf, unsigned int val);
- unsigned int (*parse_val)(void *buf);
-};
-
-struct regmap {
- struct mutex lock;
-
- 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;
-};
+#define CREATE_TRACE_POINTS
+#include <trace/events/regmap.h>
+
+#include "internal.h"
+
+bool regmap_writeable(struct regmap *map, unsigned int reg)
+{
+ if (map->max_register && reg > map->max_register)
+ return false;
+
+ if (map->writeable_reg)
+ return map->writeable_reg(map->dev, reg);
+
+ return true;
+}
+
+bool regmap_readable(struct regmap *map, unsigned int reg)
+{
+ if (map->max_register && reg > map->max_register)
+ return false;
+
+ if (map->readable_reg)
+ return map->readable_reg(map->dev, reg);
+
+ return true;
+}
+
+bool regmap_volatile(struct regmap *map, unsigned int reg)
+{
+ if (map->max_register && reg > map->max_register)
+ return false;
+
+ if (map->volatile_reg)
+ return map->volatile_reg(map->dev, reg);
+
+ return true;
+}
+
+bool regmap_precious(struct regmap *map, unsigned int reg)
+{
+ if (map->max_register && reg > map->max_register)
+ return false;
+
+ if (map->precious_reg)
+ return map->precious_reg(map->dev, reg);
+
+ return false;
+}
static void regmap_format_4_12_write(struct regmap *map,
unsigned int reg, unsigned int val)
map->format.val_bytes = config->val_bits / 8;
map->dev = dev;
map->bus = bus;
+ map->max_register = config->max_register;
+ map->writeable_reg = config->writeable_reg;
+ map->readable_reg = config->readable_reg;
+ map->volatile_reg = config->volatile_reg;
+ map->precious_reg = config->precious_reg;
switch (config->reg_bits) {
case 4:
goto err_map;
}
+ regmap_debugfs_init(map);
+
return map;
err_map:
*/
void regmap_exit(struct regmap *map)
{
+ regmap_debugfs_exit(map);
kfree(map->work_buf);
kfree(map);
}
void *buf;
int ret = -ENOTSUPP;
size_t len;
+ int i;
+
+ /* Check for unwritable registers before we start */
+ if (map->writeable_reg)
+ for (i = 0; i < val_len / map->format.val_bytes; i++)
+ if (!map->writeable_reg(map->dev, reg + i))
+ return -EINVAL;
map->format.format_reg(map->work_buf, reg);
- /* Try to do a gather write if we can */
- if (map->bus->gather_write)
+ trace_regmap_hw_write_start(map->dev, reg,
+ val_len / map->format.val_bytes);
+
+ /* If we're doing a single register write we can probably just
+ * send the work_buf directly, otherwise try to do a gather
+ * write.
+ */
+ if (val == map->work_buf + map->format.reg_bytes)
+ ret = map->bus->write(map->dev, map->work_buf,
+ map->format.reg_bytes + val_len);
+ else if (map->bus->gather_write)
ret = map->bus->gather_write(map->dev, map->work_buf,
map->format.reg_bytes,
val, val_len);
- /* Otherwise fall back on linearising by hand. */
+ /* If that didn't work fall back on linearising by hand. */
if (ret == -ENOTSUPP) {
len = map->format.reg_bytes + val_len;
buf = kmalloc(len, GFP_KERNEL);
kfree(buf);
}
+ trace_regmap_hw_write_done(map->dev, reg,
+ val_len / map->format.val_bytes);
+
return ret;
}
static int _regmap_write(struct regmap *map, unsigned int reg,
unsigned int val)
{
+ int ret;
BUG_ON(!map->format.format_write && !map->format.format_val);
+ trace_regmap_reg_write(map->dev, reg, val);
+
if (map->format.format_write) {
map->format.format_write(map, reg, val);
- return map->bus->write(map->dev, map->work_buf,
- map->format.buf_size);
+ trace_regmap_hw_write_start(map->dev, reg, 1);
+
+ ret = map->bus->write(map->dev, map->work_buf,
+ map->format.buf_size);
+
+ trace_regmap_hw_write_done(map->dev, reg, 1);
+
+ return ret;
} else {
map->format.format_val(map->work_buf + map->format.reg_bytes,
val);
if (map->bus->read_flag_mask)
u8[0] |= map->bus->read_flag_mask;
+ trace_regmap_hw_read_start(map->dev, reg,
+ val_len / map->format.val_bytes);
+
ret = map->bus->read(map->dev, map->work_buf, map->format.reg_bytes,
val, val_len);
- if (ret != 0)
- return ret;
- return 0;
+ trace_regmap_hw_read_done(map->dev, reg,
+ val_len / map->format.val_bytes);
+
+ return ret;
}
static int _regmap_read(struct regmap *map, unsigned int reg,
return -EINVAL;
ret = _regmap_raw_read(map, reg, map->work_buf, map->format.val_bytes);
- if (ret == 0)
+ if (ret == 0) {
*val = map->format.parse_val(map->work_buf);
+ trace_regmap_reg_read(map->dev, reg, *val);
+ }
return ret;
}
return ret;
}
EXPORT_SYMBOL_GPL(regmap_update_bits);
+
+static int __init regmap_initcall(void)
+{
+ regmap_debugfs_initcall();
+
+ return 0;
+}
+postcore_initcall(regmap_initcall);