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sigma-firmware: loader for Analog Devices' SigmaStudio

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Analog Devices' SigmaStudio can produce firmware blobs for devices with
these DSPs embedded (like some audio codecs).  Allow these device drivers
to easily parse and load them.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Frysinger 2011-03-22 16:34:40 -07:00 • committed by Linus Torvalds
parent 33ee3b2e2e
commit e359dc24d3
4 changed files with 188 additions and 0 deletions
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60
include/linux/sigma.h Normal file
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/*
* Load firmware files from Analog Devices SigmaStudio
*
* Copyright 2009-2011 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#ifndef __SIGMA_FIRMWARE_H__
#define __SIGMA_FIRMWARE_H__
#include <linux/firmware.h>
#include <linux/types.h>
struct i2c_client;
#define SIGMA_MAGIC "ADISIGM"
struct sigma_firmware {
const struct firmware *fw;
size_t pos;
};
struct sigma_firmware_header {
unsigned char magic[7];
u8 version;
u32 crc;
};
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;
u16 len;
u16 addr;
unsigned char payload[];
};
static inline u32 sigma_action_len(struct sigma_action *sa)
{
return (sa->len_hi << 16) | sa->len;
}
static inline size_t sigma_action_size(struct sigma_action *sa, u32 payload_len)
{
return sizeof(*sa) + payload_len + (payload_len % 2);
}
extern int process_sigma_firmware(struct i2c_client *client, const char *name);
#endif