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authorLinus Torvalds <torvalds@linux-foundation.org>2008-07-14 16:54:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-14 16:54:07 -0700
commit5a86102248592e178a9023359ccf7f0e489d8e35 (patch)
tree9e5fdb9aafca687fa412f7c034f2cfbb834b8567 /include
parent85082fd7cbe3173198aac0eb5e85ab1edcc6352c (diff)
parent751851af7aae9b8bd5a60b3897209081fbc18b2b (diff)
downloadop-kernel-dev-5a86102248592e178a9023359ccf7f0e489d8e35.zip
op-kernel-dev-5a86102248592e178a9023359ccf7f0e489d8e35.tar.gz
Merge branch 'for-2.6.27' of git://git.infradead.org/users/dwmw2/firmware-2.6
* 'for-2.6.27' of git://git.infradead.org/users/dwmw2/firmware-2.6: (64 commits) firmware: convert sb16_csp driver to use firmware loader exclusively dsp56k: use request_firmware edgeport-ti: use request_firmware() edgeport: use request_firmware() vicam: use request_firmware() dabusb: use request_firmware() cpia2: use request_firmware() ip2: use request_firmware() firmware: convert Ambassador ATM driver to request_firmware() whiteheat: use request_firmware() ti_usb_3410_5052: use request_firmware() emi62: use request_firmware() emi26: use request_firmware() keyspan_pda: use request_firmware() keyspan: use request_firmware() ttusb-budget: use request_firmware() kaweth: use request_firmware() smctr: use request_firmware() firmware: convert ymfpci driver to use firmware loader exclusively firmware: convert maestro3 driver to use firmware loader exclusively ... Fix up trivial conflicts with BKL removal in drivers/char/dsp56k.c and drivers/char/ip2/ip2main.c manually.
Diffstat (limited to 'include')
-rw-r--r--include/asm-generic/vmlinux.lds.h7
-rw-r--r--include/linux/firmware.h23
-rw-r--r--include/linux/ihex.h74
3 files changed, 103 insertions, 1 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index bf2851f..b204094 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -88,6 +88,13 @@
VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
} \
\
+ /* Built-in firmware blobs */ \
+ .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
+ VMLINUX_SYMBOL(__start_builtin_fw) = .; \
+ *(.builtin_fw) \
+ VMLINUX_SYMBOL(__end_builtin_fw) = .; \
+ } \
+ \
/* RapidIO route ops */ \
.rio_route : AT(ADDR(.rio_route) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__start_rio_route_ops) = .; \
diff --git a/include/linux/firmware.h b/include/linux/firmware.h
index 6c7eff2..c8ecf5b 100644
--- a/include/linux/firmware.h
+++ b/include/linux/firmware.h
@@ -1,18 +1,39 @@
#ifndef _LINUX_FIRMWARE_H
#define _LINUX_FIRMWARE_H
+
#include <linux/module.h>
#include <linux/types.h>
+#include <linux/compiler.h>
+
#define FIRMWARE_NAME_MAX 30
#define FW_ACTION_NOHOTPLUG 0
#define FW_ACTION_HOTPLUG 1
struct firmware {
size_t size;
- u8 *data;
+ const u8 *data;
};
struct device;
+struct builtin_fw {
+ char *name;
+ void *data;
+ unsigned long size;
+};
+
+/* We have to play tricks here much like stringify() to get the
+ __COUNTER__ macro to be expanded as we want it */
+#define __fw_concat1(x, y) x##y
+#define __fw_concat(x, y) __fw_concat1(x, y)
+
+#define DECLARE_BUILTIN_FIRMWARE(name, blob) \
+ DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob))
+
+#define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size) \
+ static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \
+ __used __section(.builtin_fw) = { name, blob, size }
+
#if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE))
int request_firmware(const struct firmware **fw, const char *name,
struct device *device);
diff --git a/include/linux/ihex.h b/include/linux/ihex.h
new file mode 100644
index 0000000..2baace2
--- /dev/null
+++ b/include/linux/ihex.h
@@ -0,0 +1,74 @@
+/*
+ * Compact binary representation of ihex records. Some devices need their
+ * firmware loaded in strange orders rather than a single big blob, but
+ * actually parsing ihex-as-text within the kernel seems silly. Thus,...
+ */
+
+#ifndef __LINUX_IHEX_H__
+#define __LINUX_IHEX_H__
+
+#include <linux/types.h>
+#include <linux/firmware.h>
+#include <linux/device.h>
+
+/* Intel HEX files actually limit the length to 256 bytes, but we have
+ drivers which would benefit from using separate records which are
+ longer than that, so we extend to 16 bits of length */
+struct ihex_binrec {
+ __be32 addr;
+ __be16 len;
+ uint8_t data[0];
+} __attribute__((aligned(4)));
+
+/* Find the next record, taking into account the 4-byte alignment */
+static inline const struct ihex_binrec *
+ihex_next_binrec(const struct ihex_binrec *rec)
+{
+ int next = ((be16_to_cpu(rec->len) + 5) & ~3) - 2;
+ rec = (void *)&rec->data[next];
+
+ return be16_to_cpu(rec->len) ? rec : NULL;
+}
+
+/* Check that ihex_next_binrec() won't take us off the end of the image... */
+static inline int ihex_validate_fw(const struct firmware *fw)
+{
+ const struct ihex_binrec *rec;
+ size_t ofs = 0;
+
+ while (ofs <= fw->size - sizeof(*rec)) {
+ rec = (void *)&fw->data[ofs];
+
+ /* Zero length marks end of records */
+ if (!be16_to_cpu(rec->len))
+ return 0;
+
+ /* Point to next record... */
+ ofs += (sizeof(*rec) + be16_to_cpu(rec->len) + 3) & ~3;
+ }
+ return -EINVAL;
+}
+
+/* Request firmware and validate it so that we can trust we won't
+ * run off the end while reading records... */
+static inline int request_ihex_firmware(const struct firmware **fw,
+ const char *fw_name,
+ struct device *dev)
+{
+ const struct firmware *lfw;
+ int ret;
+
+ ret = request_firmware(&lfw, fw_name, dev);
+ if (ret)
+ return ret;
+ ret = ihex_validate_fw(lfw);
+ if (ret) {
+ dev_err(dev, "Firmware \"%s\" not valid IHEX records\n",
+ fw_name);
+ release_firmware(lfw);
+ return ret;
+ }
+ *fw = lfw;
+ return 0;
+}
+#endif /* __LINUX_IHEX_H__ */
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