diff options
Diffstat (limited to 'sound/soc/codecs/cs35l41-lib.c')
| -rw-r--r-- | sound/soc/codecs/cs35l41-lib.c | 121 |
1 files changed, 119 insertions, 2 deletions
diff --git a/sound/soc/codecs/cs35l41-lib.c b/sound/soc/codecs/cs35l41-lib.c index f19531ebf729..dc5f502447a2 100644 --- a/sound/soc/codecs/cs35l41-lib.c +++ b/sound/soc/codecs/cs35l41-lib.c @@ -7,8 +7,11 @@ // Author: David Rhodes <david.rhodes@cirrus.com> // Author: Lucas Tanure <lucas.tanure@cirrus.com> +#include <linux/dev_printk.h> #include <linux/module.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/slab.h> #include <sound/cs35l41.h> @@ -655,7 +658,7 @@ static const struct cs35l41_otp_packed_element_t otp_map_2[CS35L41_NUM_OTP_ELEM] { 0x00017044, 0, 24 }, /*LOT_NUMBER*/ }; -const struct cs35l41_otp_map_element_t cs35l41_otp_map_map[CS35L41_NUM_OTP_MAPS] = { +static const struct cs35l41_otp_map_element_t cs35l41_otp_map_map[] = { { .id = 0x01, .map = otp_map_1, @@ -692,7 +695,6 @@ const struct cs35l41_otp_map_element_t cs35l41_otp_map_map[CS35L41_NUM_OTP_MAPS] .word_offset = 2, }, }; -EXPORT_SYMBOL_GPL(cs35l41_otp_map_map); struct regmap_config cs35l41_regmap_i2c = { .reg_bits = 32, @@ -727,6 +729,121 @@ struct regmap_config cs35l41_regmap_spi = { }; EXPORT_SYMBOL_GPL(cs35l41_regmap_spi); +static const struct cs35l41_otp_map_element_t *cs35l41_find_otp_map(u32 otp_id) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(cs35l41_otp_map_map); i++) { + if (cs35l41_otp_map_map[i].id == otp_id) + return &cs35l41_otp_map_map[i]; + } + + return NULL; +} + +int cs35l41_otp_unpack(struct device *dev, struct regmap *regmap) +{ + const struct cs35l41_otp_map_element_t *otp_map_match; + const struct cs35l41_otp_packed_element_t *otp_map; + int bit_offset, word_offset, ret, i; + unsigned int bit_sum = 8; + u32 otp_val, otp_id_reg; + u32 *otp_mem; + + otp_mem = kmalloc_array(CS35L41_OTP_SIZE_WORDS, sizeof(*otp_mem), GFP_KERNEL); + if (!otp_mem) + return -ENOMEM; + + ret = regmap_read(regmap, CS35L41_OTPID, &otp_id_reg); + if (ret) { + dev_err(dev, "Read OTP ID failed: %d\n", ret); + goto err_otp_unpack; + } + + otp_map_match = cs35l41_find_otp_map(otp_id_reg); + + if (!otp_map_match) { + dev_err(dev, "OTP Map matching ID %d not found\n", otp_id_reg); + ret = -EINVAL; + goto err_otp_unpack; + } + + ret = regmap_bulk_read(regmap, CS35L41_OTP_MEM0, otp_mem, CS35L41_OTP_SIZE_WORDS); + if (ret) { + dev_err(dev, "Read OTP Mem failed: %d\n", ret); + goto err_otp_unpack; + } + + otp_map = otp_map_match->map; + + bit_offset = otp_map_match->bit_offset; + word_offset = otp_map_match->word_offset; + + ret = regmap_write(regmap, CS35L41_TEST_KEY_CTL, 0x00000055); + if (ret) { + dev_err(dev, "Write Unlock key failed 1/2: %d\n", ret); + goto err_otp_unpack; + } + ret = regmap_write(regmap, CS35L41_TEST_KEY_CTL, 0x000000AA); + if (ret) { + dev_err(dev, "Write Unlock key failed 2/2: %d\n", ret); + goto err_otp_unpack; + } + + for (i = 0; i < otp_map_match->num_elements; i++) { + dev_dbg(dev, "bitoffset= %d, word_offset=%d, bit_sum mod 32=%d\n", + bit_offset, word_offset, bit_sum % 32); + if (bit_offset + otp_map[i].size - 1 >= 32) { + otp_val = (otp_mem[word_offset] & + GENMASK(31, bit_offset)) >> bit_offset; + otp_val |= (otp_mem[++word_offset] & + GENMASK(bit_offset + otp_map[i].size - 33, 0)) << + (32 - bit_offset); + bit_offset += otp_map[i].size - 32; + } else { + otp_val = (otp_mem[word_offset] & + GENMASK(bit_offset + otp_map[i].size - 1, bit_offset) + ) >> bit_offset; + bit_offset += otp_map[i].size; + } + bit_sum += otp_map[i].size; + + if (bit_offset == 32) { + bit_offset = 0; + word_offset++; + } + + if (otp_map[i].reg != 0) { + ret = regmap_update_bits(regmap, otp_map[i].reg, + GENMASK(otp_map[i].shift + otp_map[i].size - 1, + otp_map[i].shift), + otp_val << otp_map[i].shift); + if (ret < 0) { + dev_err(dev, "Write OTP val failed: %d\n", ret); + goto err_otp_unpack; + } + } + } + + ret = regmap_write(regmap, CS35L41_TEST_KEY_CTL, 0x000000CC); + if (ret) { + dev_err(dev, "Write Lock key failed 1/2: %d\n", ret); + goto err_otp_unpack; + } + ret = regmap_write(regmap, CS35L41_TEST_KEY_CTL, 0x00000033); + if (ret) { + dev_err(dev, "Write Lock key failed 2/2: %d\n", ret); + goto err_otp_unpack; + } + ret = 0; + +err_otp_unpack: + kfree(otp_mem); + + return ret; +} +EXPORT_SYMBOL_GPL(cs35l41_otp_unpack); + MODULE_DESCRIPTION("CS35L41 library"); MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>"); MODULE_AUTHOR("Lucas Tanure, Cirrus Logic Inc, <tanureal@opensource.cirrus.com>"); |