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| author | Randall Spangler <rspangler@chromium.org> | 2012-07-03 14:45:59 -0700 |
|---|---|---|
| committer | Gerrit <chrome-bot@google.com> | 2012-07-07 17:14:18 -0700 |
| commit | 7f5f7be3e5df92ec2e9447b3d5d0b8ddeb96c9a0 (patch) | |
| tree | f58e23fa5d053e31163faf8279882f0d9891c1fe /common/host_command.c | |
| parent | 0e42faf85b3a4adbc83cb087e0bdab7641df9f1b (diff) | |
| download | chrome-ec-7f5f7be3e5df92ec2e9447b3d5d0b8ddeb96c9a0.tar.gz | |
Add memory-mapped data support for I2C and SPI protocols
And fix returning memory-mapped string length on LPC as well.
BUG=chrome-os-partner:11090
TEST=manual
from EC, 'hostevent set 0x40000'
from host, 'ectool eventget' --> should print 0x40000
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Change-Id: I9edbd0a1468b5d4160ce67c471332226e51fa868
Reviewed-on: https://gerrit.chromium.org/gerrit/26719
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'common/host_command.c')
| -rw-r--r-- | common/host_command.c | 40 |
1 files changed, 39 insertions, 1 deletions
diff --git a/common/host_command.c b/common/host_command.c index cc7de1e473..3647e50cda 100644 --- a/common/host_command.c +++ b/common/host_command.c @@ -23,6 +23,18 @@ static int host_command[2]; +#ifndef CONFIG_LPC +static uint8_t host_memmap[EC_MEMMAP_SIZE]; +#endif + +uint8_t *host_get_memmap(int offset) +{ +#ifdef CONFIG_LPC + return lpc_get_memmap_range() + offset; +#else + return host_memmap + offset; +#endif +} void host_command_received(int slot, int command) { @@ -93,6 +105,32 @@ static int host_command_read_test(uint8_t *data, int *resp_size) } DECLARE_HOST_COMMAND(EC_CMD_READ_TEST, host_command_read_test); +#ifndef CONFIG_LPC +/* + * Host command to read memory map is not needed on LPC, because LPC can + * directly map the data to the host's memory space. + */ +static int host_command_read_memmap(uint8_t *data, int *resp_size) +{ + struct ec_params_read_memmap *p = (struct ec_params_read_memmap *)data; + struct ec_response_read_memmap *r = + (struct ec_response_read_memmap *)data; + + /* Copy params out of data before we overwrite it with output */ + uint8_t offset = p->offset; + uint8_t size = p->size; + + if (size > sizeof(r->data) || offset > EC_MEMMAP_SIZE || + offset + size > EC_MEMMAP_SIZE) + return EC_RES_INVALID_PARAM; + + memcpy(r->data, host_get_memmap(offset), size); + + *resp_size = size; + return EC_RES_SUCCESS; +} +DECLARE_HOST_COMMAND(EC_CMD_READ_MEMMAP, host_command_read_memmap); +#endif #ifdef CONFIG_LPC /* ACPI query event handler. Note that the returned value is NOT actually @@ -114,7 +152,7 @@ static int host_command_acpi_query_event(uint8_t *data, int *resp_size) return 0; } DECLARE_HOST_COMMAND(EC_CMD_ACPI_QUERY_EVENT, host_command_acpi_query_event); -#endif +#endif /* CONFIG_LPC */ /* Finds a command by command number. Returns the command structure, or NULL if |