diff options
Diffstat (limited to 'meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0055-Documentation-jtag-Add-ABI-documentation.patch')
| -rw-r--r-- | meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0055-Documentation-jtag-Add-ABI-documentation.patch | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0055-Documentation-jtag-Add-ABI-documentation.patch b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0055-Documentation-jtag-Add-ABI-documentation.patch index af641ffe2..b91311d94 100644 --- a/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0055-Documentation-jtag-Add-ABI-documentation.patch +++ b/meta-openbmc-mods/meta-common/recipes-kernel/linux/linux-aspeed/0055-Documentation-jtag-Add-ABI-documentation.patch @@ -86,8 +86,8 @@ Comments pointed by Pavel Machek <pavel@ucw.cz> --- Documentation/ABI/testing/jtag-dev | 23 +++++++ Documentation/jtag/overview | 27 ++++++++ - Documentation/jtag/transactions | 138 +++++++++++++++++++++++++++++++++++++ - 3 files changed, 188 insertions(+) + Documentation/jtag/transactions | 145 +++++++++++++++++++++++++++++++++++++ + 3 files changed, 195 insertions(+) create mode 100644 Documentation/ABI/testing/jtag-dev create mode 100644 Documentation/jtag/overview create mode 100644 Documentation/jtag/transactions @@ -159,7 +159,7 @@ new file mode 100644 index 0000000..76fd0b1 --- /dev/null +++ b/Documentation/jtag/transactions -@@ -0,0 +1,138 @@ +@@ -0,0 +1,145 @@ +The JTAG API +============= + @@ -204,8 +204,9 @@ index 0000000..76fd0b1 +------ +Force JTAG state machine to go into a TAPC state + -+struct jtag_end_tap_state { ++struct jtag_tap_state { + __u8 reset; ++ __u8 from; + __u8 endstate; + __u8 tck; +}; @@ -217,21 +218,22 @@ index 0000000..76fd0b1 +tck: clock counter + +Example: -+ struct jtag_end_tap_state end_state; ++ struct jtag_tap_state tap_state; + -+ end_state.endstate = JTAG_STATE_IDLE; -+ end_state.reset = 0; -+ end_state.tck = data_p->tck; ++ tap_state.from = JTAG_STATE_TLRESET; ++ tap_state.endstate = JTAG_STATE_IDLE; ++ tap_state.reset = 0; ++ tap_state.tck = data_p->tck; + usleep(25 * 1000); -+ ioctl(jtag_fd, JTAG_SIOCSTATE, &end_state); ++ ioctl(jtag_fd, JTAG_SIOCSTATE, &tap_state); + +JTAG_GIOCSTATUS +------ +Get JTAG TAPC machine state + + unsigned int jtag_fd; -+ jtag_endstate endstate; -+ ioctl(jtag_fd, JTAG_GIOCSTATUS, &endstate); ++ jtag_tapstate tapstate; ++ ioctl(jtag_fd, JTAG_GIOCSTATUS, &tapstate); + +JTAG_IOCXFER +------ @@ -240,6 +242,7 @@ index 0000000..76fd0b1 +struct jtag_xfer { + __u8 type; + __u8 direction; ++ __u8 from; + __u8 endstate; + __u8 padding; + __u32 length; @@ -250,8 +253,11 @@ index 0000000..76fd0b1 +direction: xfer direction - JTAG_READ_XFER/JTAG_WRITE_XFER/JTAG_READ_WRITE_XFER +length: xfer data length in bits +tdio : xfer data array ++from: xfer from state can be current JTAG tap state saved by the driver ++ JTAG_STATE_CURRENT or in a multichain environment any state listed in ++ jtag_tapstate struct saved by your multichain controller software. +endstate: xfer end state after transaction finish -+ can be: any state listed in jtag_endstate struct ++ can be: any state listed in jtag_tapstate struct + +Example: + struct jtag_xfer xfer; @@ -261,6 +267,7 @@ index 0000000..76fd0b1 + xfer.type = JTAG_SDR_XFER; + xfer.tdio = (__u64)buf; + xfer.length = buf_len; ++ xfer.from = JTAG_STATE_TLRESET; + xfer.endstate = JTAG_STATE_IDLE; + + if (is_read) @@ -300,4 +307,3 @@ index 0000000..76fd0b1 + tdo1 = bitbang_data[1].tdo; -- 2.7.4 - |