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Diffstat (limited to 'drivers/w1')
-rw-r--r--drivers/w1/slaves/w1_ds2433.c47
1 files changed, 35 insertions, 12 deletions
diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
index cd99eceac1ae..0c67082c8bb7 100644
--- a/drivers/w1/slaves/w1_ds2433.c
+++ b/drivers/w1/slaves/w1_ds2433.c
@@ -34,9 +34,24 @@
#define W1_F23_READ_SCRATCH 0xAA
#define W1_F23_COPY_SCRATCH 0x55
+struct ds2433_config {
+ size_t eeprom_size; /* eeprom size in bytes */
+ unsigned int page_count; /* number of 256 bits pages */
+ unsigned int tprog; /* time in ms for page programming */
+};
+
+static const struct ds2433_config config_f23 = {
+ .eeprom_size = W1_EEPROM_SIZE,
+ .page_count = 16,
+ .tprog = 5,
+};
+
struct w1_f23_data {
- u8 memory[W1_EEPROM_SIZE];
+#ifdef CONFIG_W1_SLAVE_DS2433_CRC
+ u8 *memory;
u32 validcrc;
+#endif
+ const struct ds2433_config *cfg;
};
/*
@@ -95,7 +110,7 @@ static ssize_t eeprom_read(struct file *filp, struct kobject *kobj,
u8 wrbuf[3];
#endif
- count = w1_f23_fix_count(off, count, W1_EEPROM_SIZE);
+ count = w1_f23_fix_count(off, count, bin_attr->size);
if (!count)
return 0;
@@ -150,9 +165,7 @@ out_up:
*/
static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data)
{
-#ifdef CONFIG_W1_SLAVE_DS2433_CRC
struct w1_f23_data *f23 = sl->family_data;
-#endif
u8 wrbuf[4];
u8 rdbuf[W1_PAGE_SIZE + 3];
u8 es = (addr + len - 1) & 0x1f;
@@ -188,8 +201,8 @@ static int w1_f23_write(struct w1_slave *sl, int addr, int len, const u8 *data)
wrbuf[3] = es;
w1_write_block(sl->master, wrbuf, 4);
- /* Sleep for 5 ms to wait for the write to complete */
- msleep(5);
+ /* Sleep for tprog ms to wait for the write to complete */
+ msleep(f23->cfg->tprog);
/* Reset the bus to wake up the EEPROM (this may not be needed) */
w1_reset_bus(sl->master);
@@ -206,7 +219,7 @@ static ssize_t eeprom_write(struct file *filp, struct kobject *kobj,
struct w1_slave *sl = kobj_to_w1_slave(kobj);
int addr, len, idx;
- count = w1_f23_fix_count(off, count, W1_EEPROM_SIZE);
+ count = w1_f23_fix_count(off, count, bin_attr->size);
if (!count)
return 0;
@@ -268,24 +281,34 @@ static const struct attribute_group *w1_f23_groups[] = {
static int w1_f23_add_slave(struct w1_slave *sl)
{
-#ifdef CONFIG_W1_SLAVE_DS2433_CRC
struct w1_f23_data *data;
data = kzalloc(sizeof(struct w1_f23_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
+
+ data->cfg = &config_f23;
+
+#ifdef CONFIG_W1_SLAVE_DS2433_CRC
+ data->memory = kzalloc(data->cfg->eeprom_size, GFP_KERNEL);
+ if (!data->memory) {
+ kfree(data);
+ return -ENOMEM;
+ }
+#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
sl->family_data = data;
-#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
return 0;
}
static void w1_f23_remove_slave(struct w1_slave *sl)
{
-#ifdef CONFIG_W1_SLAVE_DS2433_CRC
- kfree(sl->family_data);
+ struct w1_f23_data *data = sl->family_data;
sl->family_data = NULL;
-#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
+#ifdef CONFIG_W1_SLAVE_DS2433_CRC
+ kfree(data->memory);
+#endif /* CONFIG_W1_SLAVE_DS2433_CRC */
+ kfree(data);
}
static const struct w1_family_ops w1_f23_fops = {