Modified: trunk/drivers/firmware/Kconfig (7693 => 7694)
--- trunk/drivers/firmware/Kconfig 2009-10-21 09:17:36 UTC (rev 7693)
+++ trunk/drivers/firmware/Kconfig 2009-10-21 09:18:46 UTC (rev 7694)
@@ -132,4 +132,9 @@
detect iSCSI boot parameters dynamically during system boot, say Y.
Otherwise, say N.
+config SIGMA
+ bool "SigmaStudio firmware loader"
+ default n
+ help
+
endmenu
Modified: trunk/drivers/firmware/Makefile (7693 => 7694)
--- trunk/drivers/firmware/Makefile 2009-10-21 09:17:36 UTC (rev 7693)
+++ trunk/drivers/firmware/Makefile 2009-10-21 09:18:46 UTC (rev 7694)
@@ -11,3 +11,4 @@
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
Added: trunk/drivers/firmware/sigma.c (0 => 7694)
--- trunk/drivers/firmware/sigma.c (rev 0)
+++ trunk/drivers/firmware/sigma.c 2009-10-21 09:18:46 UTC (rev 7694)
@@ -0,0 +1,112 @@
+/*
+ * Load Analog Devices SigmaStudio firmware files
+ *
+ * Copyright 2009 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#define DEBUG
+
+#include <linux/crc32.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/sigma.h>
+
+/* Return: 0==OK, <0==error, >0==no more actions */
+int process_sigma_action(struct i2c_client *client, struct sigma_firmware *ssfw)
+{
+ struct sigma_action *sa = (void *)(ssfw->fw->data + ssfw->pos);
+ 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:
+ if (ssfw->fw->size < ssfw->pos + len)
+ return -EINVAL;
+ ret = i2c_master_send(client, (void *)&sa->addr, len);
+ len -= 2;
+ break;
+
+ case SIGMA_ACTION_DELAY:
+ ret = 0;
+ udelay(len);
+ len = 0;
+ break;
+
+ case SIGMA_ACTION_END:
+ return 1;
+
+ default:
+ return -EINVAL;
+ }
+
+ if (!ret) {
+ ssfw->pos += sigma_action_size(sa, len);
+ return ssfw->pos == ssfw->fw->size;
+ } else
+ return ret;
+}
+
+int process_sigma_actions(struct i2c_client *client, struct sigma_firmware *ssfw)
+{
+ pr_debug("%s: processing %p\n", __func__, ssfw);
+
+ while (1) {
+ int ret = process_sigma_action(client, ssfw);
+ pr_debug("%s: action returned %i\n", __func__, ret);
+ if (ret == 1)
+ return 0;
+ else if (ret)
+ return ret;
+ }
+}
+
+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;
+
+ 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 */
+ if (fw->size < sizeof(*ssfw_head)) {
+ ret = -ENODATA;
+ goto done;
+ }
+ ssfw_head = (void *)fw->data;
+ if (memcmp(ssfw_head->magic, SIGMA_MAGIC, ARRAY_SIZE(ssfw_head->magic))) {
+ ret = -EINVAL;
+ goto done;
+ }
+ pr_debug("%s: crc=%x\n", __func__, crc32(0, fw->data, fw->size));
+
+ 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;
+}
Added: trunk/include/linux/sigma.h (0 => 7694)
--- trunk/include/linux/sigma.h (rev 0)
+++ trunk/include/linux/sigma.h 2009-10-21 09:18:46 UTC (rev 7694)
@@ -0,0 +1,60 @@
+/*
+ * Load firmware files from Analog Devices SigmaStudio
+ *
+ * Copyright 2009 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>
+
+#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);
+}
+
+struct i2c_client;
+
+extern int process_sigma_firmware(struct i2c_client *client, const char *name);
+
+#endif
