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| author | Gwendal Grignou <gwendal@chromium.org> | 2017-07-20 09:48:50 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-07-28 17:45:13 -0700 |
| commit | 1b25735b732e7766aceb3f060e4ca205aba6d358 (patch) | |
| tree | 4ac67bc0f1e1449177698490b49be94f54cf2c59 /include/usb_descriptor.h | |
| parent | 734ebcbbb4e1e6f816225c59acef08ebd1094a2c (diff) | |
| download | chrome-ec-1b25735b732e7766aceb3f060e4ca205aba6d358.tar.gz | |
Add OTP support
One Time Programmable memory can be used to store permanent data like
serial numbers.
Reorganize the code to support writing serial number to OTP, in
addition to pstate (if using its own memory bank) or autogenerate from
unique id (hammer).
+ Add CONFIG_OTP to enable OTP code
+ Add CONFIG_SERIALNO_LEN to indicate the size of the serial number
string. Currently set to 28, when USB serial number is needed.
+ Expose flash_read|write_pstate_serial and add otp_read|write_serail,
remove more generic flash_read|write_serial.
+ Make board_read|write_serial generic, declared outside of USB subsystem.
Priority order to read|write serial string:
- board definition (like hammer)
- pstate location, if stored in its private memory bank
- otp area
If none of these methods are available, a compilation error is raised.
BUG=chromium:746471
BRANCH=none
TEST=compile
Change-Id: I3d16125a6c0f424fb30e38123e63cf074b3cb2d3
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/580289
Reviewed-by: Nick Sanders <nsanders@chromium.org>
Diffstat (limited to 'include/usb_descriptor.h')
| -rw-r--r-- | include/usb_descriptor.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/include/usb_descriptor.h b/include/usb_descriptor.h index 33fde009d2..7f03b1883a 100644 --- a/include/usb_descriptor.h +++ b/include/usb_descriptor.h @@ -258,11 +258,10 @@ struct usb_setup_packet { #ifdef CONFIG_USB_SERIALNO /* String Descriptor for USB, for editable strings. */ -#define USB_STRING_LEN 28 struct usb_string_desc { uint8_t _len; uint8_t _type; - wchar_t _data[USB_STRING_LEN]; + wchar_t _data[CONFIG_SERIALNO_LEN]; }; #define USB_WR_STRING_DESC(str) \ (&(struct usb_string_desc) { \ |