diff options
| author | Peter Delevoryas <pdel@fb.com> | 2022-06-30 09:21:14 +0200 |
|---|---|---|
| committer | Cédric Le Goater <clg@kaod.org> | 2022-06-30 09:21:14 +0200 |
| commit | 55c57023b740c29151d42600af9ac43ba00e56cc (patch) | |
| tree | 847312bcb99b4f486ed20bae9dfd4aaf76bef4fc /hw/misc/trace-events | |
| parent | 1c5d909f882ebd666224e3e1338a87616ebce4ed (diff) | |
hw/misc/aspeed: Add PECI controller
This introduces a really basic PECI controller that responses to
commands by always setting the response code to success and then raising
an interrupt to indicate the command is done. This helps avoid getting
hit with constant errors if the driver continuously attempts to send a
command and keeps timing out.
The AST2400 and AST2500 only included registers up to 0x5C, not 0xFC.
They supported PECI 1.1, 2.0, and 3.0. The AST2600 and AST1030 support
PECI 4.0, which includes more read/write buffer registers from 0x80 to
0xFC to support 64-byte mode.
This patch doesn't attempt to handle that, or to create a different
version of the controller for the different generations, since it's only
implementing functionality that is common to all generations.
The basic sequence of events is that the firmware will read and write to
various registers and then trigger a command by setting the FIRE bit in
the command register (similar to the I2C controller).
Then the firmware waits for an interrupt from the PECI controller,
expecting the interrupt status register to be filled in with info on
what happened. If the command was transmitted and received successfully,
then response codes from the host CPU will be found in the data buffer
registers.
Signed-off-by: Peter Delevoryas <pdel@fb.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220630045133.32251-12-me@pjd.dev>
[ clg: s/sysbus_mmio_map/aspeed_mmio_map/ ]
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Diffstat (limited to 'hw/misc/trace-events')
| -rw-r--r-- | hw/misc/trace-events | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/hw/misc/trace-events b/hw/misc/trace-events index f776f24fb5..4d51a80de1 100644 --- a/hw/misc/trace-events +++ b/hw/misc/trace-events @@ -210,6 +210,11 @@ aspeed_i3c_device_write(uint32_t deviceid, uint64_t offset, uint64_t data) "I3C aspeed_sdmc_write(uint64_t reg, uint64_t data) "reg @0x%" PRIx64 " data: 0x%" PRIx64 aspeed_sdmc_read(uint64_t reg, uint64_t data) "reg @0x%" PRIx64 " data: 0x%" PRIx64 +# aspeed_peci.c +aspeed_peci_read(uint64_t offset, uint64_t data) "offset 0x%" PRIx64 " data 0x%" PRIx64 +aspeed_peci_write(uint64_t offset, uint64_t data) "offset 0x%" PRIx64 " data 0x%" PRIx64 +aspeed_peci_raise_interrupt(uint32_t ctrl, uint32_t status) "ctrl 0x%" PRIx32 " status 0x%" PRIx32 + # bcm2835_property.c bcm2835_mbox_property(uint32_t tag, uint32_t bufsize, size_t resplen) "mbox property tag:0x%08x in_sz:%u out_sz:%zu" |