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| author | Urja Rannikko <urjaman@gmail.com> | 2011-09-15 23:38:14 +0000 |
|---|---|---|
| committer | Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at> | 2011-09-15 23:38:14 +0000 |
| commit | c93f5f123239121fdeba03c02f9e448ed97c52a4 (patch) | |
| tree | 977910ff6ca9a2f736a5fc5103cab30663912582 /serprog-protocol.txt | |
| parent | f74a7b9c4f43445c8116533b1593ecef4459b114 (diff) | |
| download | flashrom-c93f5f123239121fdeba03c02f9e448ed97c52a4.tar.gz flashrom-c93f5f123239121fdeba03c02f9e448ed97c52a4.tar.bz2 flashrom-c93f5f123239121fdeba03c02f9e448ed97c52a4.zip | |
serprog: add SPI support
Adds a new opcode (0x13) that just relays SPI bytes and wires it up to be
usable within serprog.c. Checks for mandatory opcodes are moved around and
changed a bit, but non-SPI programmers should not be harmed by this patch.
Corresponding to flashrom svn r1442.
Signed-off-by: Urja Rannikko <urjaman@gmail.com>
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
Diffstat (limited to 'serprog-protocol.txt')
| -rw-r--r-- | serprog-protocol.txt | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/serprog-protocol.txt b/serprog-protocol.txt index 52f901a6..168a28e7 100644 --- a/serprog-protocol.txt +++ b/serprog-protocol.txt @@ -31,6 +31,8 @@ COMMAND Description Parameters Return Value 0x10 Sync NOP none NAK + ACK (for synchronization) 0x11 Query maximum read-n length none ACK + 24-bit length (0==2^24) / NAK 0x12 Set used bustype 8-bit flags (as with 0x05) ACK / NAK +0x13 Perform SPI operation 24-bit slen + 24-bit rlen ACK + rlen bytes of data / NAK + + slen bytes of data 0x?? unimplemented command - invalid. @@ -50,7 +52,7 @@ Additional information of the above commands: it should return a big bogus value - eg 0xFFFF. 0x05 (Q_BUSTYPE): The bit's are defined as follows: - bit 0: PARALLEL, bit 1: LPC, bit 2: FWH, bit 3: SPI (if ever supported). + bit 0: PARALLEL, bit 1: LPC, bit 2: FWH, bit 3: SPI. 0x06 (Q_CHIPSIZE): Only applicable to parallel programmers. An LPC/FWH/SPI-programmer can report this as not supported in the command bitmap. @@ -66,6 +68,11 @@ Additional information of the above commands: Set's the used bustype if the programmer can support more than one flash protocol. Sending a byte with more than 1 bit set will make the programmer decide among them on it's own. Bit values as with Q_BUSTYPE. + 0x13 (O_SPIOP): + Send and receive bytes via SPI. + Maximum slen is Q_WRNMAXLEN in case Q_BUSTYPE returns SPI only or S_BUSTYPE was used + to set SPI exclusively before. Same for rlen and Q_RDNMAXLEN. + This operation is immediate, meaning it doesnt use the operation buffer. About mandatory commands: The only truly mandatory commands for any device are 0x00, 0x01, 0x02 and 0x10, but one can't really do anything with these commands. @@ -99,3 +106,4 @@ This define listing should help C coders - (it's here to be the single source fo #define S_CMD_SYNCNOP 0x10 /* Special no-operation that returns NAK+ACK */ #define S_CMD_Q_RDNMAXLEN 0x11 /* Query read-n maximum length */ #define S_CMD_S_BUSTYPE 0x12 /* Set used bustype(s). */ +#define S_CMD_O_SPIOP 0x13 /* Perform SPI operation. */ |