zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/sound/soc/codecs/sigmadsp.c b/ap/os/linux/linux-3.4.x/sound/soc/codecs/sigmadsp.c
new file mode 100644
index 0000000..bb3878c
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/sound/soc/codecs/sigmadsp.c
@@ -0,0 +1,253 @@
+/*
+ * Load Analog Devices SigmaStudio firmware files
+ *
+ * Copyright 2009-2011 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/crc32.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/module.h>
+
+#include "sigmadsp.h"
+
+#define SIGMA_MAGIC "ADISIGM"
+
+struct sigma_firmware_header {
+ unsigned char magic[7];
+ u8 version;
+ __le32 crc;
+} __packed;
+
+enum {
+ SIGMA_ACTION_WRITEXBYTES = 0,
+ SIGMA_ACTION_WRITESINGLE,
+ SIGMA_ACTION_WRITESAFELOAD,
+ SIGMA_ACTION_DELAY,
+ SIGMA_ACTION_PLLWAIT,
+ SIGMA_ACTION_NOOP,
+ SIGMA_ACTION_END,
+};
+
+struct sigma_action {
+ u8 instr;
+ u8 len_hi;
+ __le16 len;
+ __be16 addr;
+ unsigned char payload[];
+} __packed;
+
+struct sigma_firmware {
+ const struct firmware *fw;
+ size_t pos;
+
+ void *control_data;
+ int (*write)(void *control_data, const struct sigma_action *sa,
+ size_t len);
+};
+
+static inline u32 sigma_action_len(struct sigma_action *sa)
+{
+ return (sa->len_hi << 16) | le16_to_cpu(sa->len);
+}
+
+static size_t sigma_action_size(struct sigma_action *sa)
+{
+ size_t payload = 0;
+
+ switch (sa->instr) {
+ case SIGMA_ACTION_WRITEXBYTES:
+ case SIGMA_ACTION_WRITESINGLE:
+ case SIGMA_ACTION_WRITESAFELOAD:
+ payload = sigma_action_len(sa);
+ break;
+ default:
+ break;
+ }
+
+ payload = ALIGN(payload, 2);
+
+ return payload + sizeof(struct sigma_action);
+}
+
+/*
+ * Returns a negative error value in case of an error, 0 if processing of
+ * the firmware should be stopped after this action, 1 otherwise.
+ */
+static int
+process_sigma_action(struct sigma_firmware *ssfw, struct sigma_action *sa)
+{
+ size_t len = sigma_action_len(sa);
+ int ret;
+
+ pr_debug("%s: instr:%i addr:%#x len:%zu\n", __func__,
+ sa->instr, sa->addr, len);
+
+ switch (sa->instr) {
+ case SIGMA_ACTION_WRITEXBYTES:
+ case SIGMA_ACTION_WRITESINGLE:
+ case SIGMA_ACTION_WRITESAFELOAD:
+ ret = ssfw->write(ssfw->control_data, sa, len);
+ if (ret < 0)
+ return -EINVAL;
+ break;
+ case SIGMA_ACTION_DELAY:
+ udelay(len);
+ len = 0;
+ break;
+ case SIGMA_ACTION_END:
+ return 0;
+ default:
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+static int
+process_sigma_actions(struct sigma_firmware *ssfw)
+{
+ struct sigma_action *sa;
+ size_t size;
+ int ret;
+
+ while (ssfw->pos + sizeof(*sa) <= ssfw->fw->size) {
+ sa = (struct sigma_action *)(ssfw->fw->data + ssfw->pos);
+
+ size = sigma_action_size(sa);
+ ssfw->pos += size;
+ if (ssfw->pos > ssfw->fw->size || size == 0)
+ break;
+
+ ret = process_sigma_action(ssfw, sa);
+
+ pr_debug("%s: action returned %i\n", __func__, ret);
+
+ if (ret <= 0)
+ return ret;
+ }
+
+ if (ssfw->pos != ssfw->fw->size)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int _process_sigma_firmware(struct device *dev,
+ struct sigma_firmware *ssfw, const char *name)
+{
+ int ret;
+ struct sigma_firmware_header *ssfw_head;
+ const struct firmware *fw;
+ u32 crc;
+
+ pr_debug("%s: loading firmware %s\n", __func__, name);
+
+ /* first load the blob */
+ ret = request_firmware(&fw, name, dev);
+ if (ret) {
+ pr_debug("%s: request_firmware() failed with %i\n", __func__, ret);
+ return ret;
+ }
+ ssfw->fw = fw;
+
+ /* then verify the header */
+ ret = -EINVAL;
+
+ /*
+ * Reject too small or unreasonable large files. The upper limit has been
+ * chosen a bit arbitrarily, but it should be enough for all practical
+ * purposes and having the limit makes it easier to avoid integer
+ * overflows later in the loading process.
+ */
+ if (fw->size < sizeof(*ssfw_head) || fw->size >= 0x4000000) {
+ dev_err(dev, "Failed to load firmware: Invalid size\n");
+ goto done;
+ }
+
+ ssfw_head = (void *)fw->data;
+ if (memcmp(ssfw_head->magic, SIGMA_MAGIC, ARRAY_SIZE(ssfw_head->magic))) {
+ dev_err(dev, "Failed to load firmware: Invalid magic\n");
+ goto done;
+ }
+
+ if (ssfw_head->version != 1) {
+ dev_err(dev,
+ "Failed to load firmware: Invalid version %d. Supported firmware versions: 1\n",
+ ssfw_head->version);
+ goto done;
+ }
+
+ crc = crc32(0, fw->data + sizeof(*ssfw_head),
+ fw->size - sizeof(*ssfw_head));
+ pr_debug("%s: crc=%x\n", __func__, crc);
+ if (crc != le32_to_cpu(ssfw_head->crc)) {
+ dev_err(dev, "Failed to load firmware: Wrong crc checksum: expected %x got %x\n",
+ le32_to_cpu(ssfw_head->crc), crc);
+ goto done;
+ }
+
+ ssfw->pos = sizeof(*ssfw_head);
+
+ /* finally process all of the actions */
+ ret = process_sigma_actions(ssfw);
+
+ done:
+ release_firmware(fw);
+
+ pr_debug("%s: loaded %s\n", __func__, name);
+
+ return ret;
+}
+
+#if IS_ENABLED(CONFIG_I2C)
+
+static int sigma_action_write_i2c(void *control_data,
+ const struct sigma_action *sa, size_t len)
+{
+ return i2c_master_send(control_data, (const unsigned char *)&sa->addr,
+ len);
+}
+
+int process_sigma_firmware(struct i2c_client *client, const char *name)
+{
+ struct sigma_firmware ssfw;
+
+ ssfw.control_data = client;
+ ssfw.write = sigma_action_write_i2c;
+
+ return _process_sigma_firmware(&client->dev, &ssfw, name);
+}
+EXPORT_SYMBOL(process_sigma_firmware);
+
+#endif
+
+#if IS_ENABLED(CONFIG_REGMAP)
+
+static int sigma_action_write_regmap(void *control_data,
+ const struct sigma_action *sa, size_t len)
+{
+ return regmap_raw_write(control_data, be16_to_cpu(sa->addr),
+ sa->payload, len - 2);
+}
+
+int process_sigma_firmware_regmap(struct device *dev, struct regmap *regmap,
+ const char *name)
+{
+ struct sigma_firmware ssfw;
+
+ ssfw.control_data = regmap;
+ ssfw.write = sigma_action_write_regmap;
+
+ return _process_sigma_firmware(dev, &ssfw, name);
+}
+EXPORT_SYMBOL(process_sigma_firmware_regmap);
+
+#endif
+
+MODULE_LICENSE("GPL");