diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firmware/Kconfig | 12 | ||||
| -rw-r--r-- | drivers/firmware/Makefile | 1 | ||||
| -rw-r--r-- | drivers/firmware/sigma.c | 153 |
3 files changed, 0 insertions, 166 deletions
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index efba163595db..9b00072a020f 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -145,18 +145,6 @@ config ISCSI_IBFT detect iSCSI boot parameters dynamically during system boot, say Y. Otherwise, say N. -config SIGMA - tristate "SigmaStudio firmware loader" - depends on I2C - select CRC32 - default n - help - Enable helper functions for working with Analog Devices SigmaDSP - parts and binary firmwares produced by Analog Devices SigmaStudio. - - If unsure, say N here. Drivers that need these helpers will select - this option automatically. - source "drivers/firmware/google/Kconfig" endmenu diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile index 47338c979126..5a7e27399729 100644 --- a/drivers/firmware/Makefile +++ b/drivers/firmware/Makefile @@ -12,6 +12,5 @@ obj-$(CONFIG_DMIID) += dmi-id.o obj-$(CONFIG_ISCSI_IBFT_FIND) += iscsi_ibft_find.o obj-$(CONFIG_ISCSI_IBFT) += iscsi_ibft.o obj-$(CONFIG_FIRMWARE_MEMMAP) += memmap.o -obj-$(CONFIG_SIGMA) += sigma.o obj-$(CONFIG_GOOGLE_FIRMWARE) += google/ diff --git a/drivers/firmware/sigma.c b/drivers/firmware/sigma.c deleted file mode 100644 index 1eedb6f7fdab..000000000000 --- a/drivers/firmware/sigma.c +++ /dev/null @@ -1,153 +0,0 @@ -/* - * 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/module.h> -#include <linux/sigma.h> - -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 i2c_client *client, 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 = i2c_master_send(client, (void *)&sa->addr, 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 i2c_client *client, 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(client, 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; -} - -int process_sigma_firmware(struct i2c_client *client, const char *name) -{ - int ret; - struct sigma_firmware_header *ssfw_head; - struct sigma_firmware ssfw; - const struct firmware *fw; - u32 crc; - - pr_debug("%s: loading firmware %s\n", __func__, name); - - /* first load the blob */ - ret = request_firmware(&fw, name, &client->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) - goto done; - - ssfw_head = (void *)fw->data; - if (memcmp(ssfw_head->magic, SIGMA_MAGIC, ARRAY_SIZE(ssfw_head->magic))) - 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)) - goto done; - - ssfw.pos = sizeof(*ssfw_head); - - /* finally process all of the actions */ - ret = process_sigma_actions(client, &ssfw); - - done: - release_firmware(fw); - - pr_debug("%s: loaded %s\n", __func__, name); - - return ret; -} -EXPORT_SYMBOL(process_sigma_firmware); - -MODULE_LICENSE("GPL"); |
