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| author | Vic Yang <victoryang@chromium.org> | 2013-09-16 14:45:35 +0800 |
|---|---|---|
| committer | chrome-internal-fetch <chrome-internal-fetch@google.com> | 2013-09-17 03:22:12 +0000 |
| commit | d5e183f9e56d9e623885b163d9b71203d04880cf (patch) | |
| tree | a3baabc92658407f296e69a4a308cd94d50e8c53 /chip/host/i2c.c | |
| parent | cdd5c206cd2125983f83ef3a54470b5e99f82031 (diff) | |
| download | chrome-ec-d5e183f9e56d9e623885b163d9b71203d04880cf.tar.gz | |
Fake I2C device support for emulator
To test drivers, we need a way to fake I2C periphrals. With this CL, a
fake peripheral can be done by declaring its own I2C read/write
functions. The fake I2C peripherals may return EC_ERROR_INVAL to
indicate it's not responding. The emulator I2C read/write call scans
through all registered I2C peripherals and uses the first response.
BUG=chrome-os-partner:19235
TEST=Pass sbs_charging test with the next CL.
BRANCH=None
Change-Id: I9380dc40e147781b42e09eb6979c864bbd9f2ac4
Signed-off-by: Vic Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/169511
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Diffstat (limited to 'chip/host/i2c.c')
| -rw-r--r-- | chip/host/i2c.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/chip/host/i2c.c b/chip/host/i2c.c index b9d685a656..072d4564f8 100644 --- a/chip/host/i2c.c +++ b/chip/host/i2c.c @@ -6,29 +6,71 @@ */ #include "i2c.h" +#include "link_defs.h" +#include "test_util.h" int i2c_read16(int port, int slave_addr, int offset, int *data) { + const struct test_i2c_read_dev *p; + int rv; + + for (p = __test_i2c_read16; p < __test_i2c_read16_end; ++p) { + rv = p->routine(port, slave_addr, offset, data); + if (rv != EC_ERROR_INVAL) + return rv; + } return EC_ERROR_UNKNOWN; } int i2c_write16(int port, int slave_addr, int offset, int data) { + const struct test_i2c_write_dev *p; + int rv; + + for (p = __test_i2c_write16; p < __test_i2c_write16_end; ++p) { + rv = p->routine(port, slave_addr, offset, data); + if (rv != EC_ERROR_INVAL) + return rv; + } return EC_ERROR_UNKNOWN; } int i2c_read8(int port, int slave_addr, int offset, int *data) { + const struct test_i2c_read_dev *p; + int rv; + + for (p = __test_i2c_read8; p < __test_i2c_read8_end; ++p) { + rv = p->routine(port, slave_addr, offset, data); + if (rv != EC_ERROR_INVAL) + return rv; + } return EC_ERROR_UNKNOWN; } int i2c_write8(int port, int slave_addr, int offset, int data) { + const struct test_i2c_write_dev *p; + int rv; + + for (p = __test_i2c_write8; p < __test_i2c_write8_end; ++p) { + rv = p->routine(port, slave_addr, offset, data); + if (rv != EC_ERROR_INVAL) + return rv; + } return EC_ERROR_UNKNOWN; } int i2c_read_string(int port, int slave_addr, int offset, uint8_t *data, int len) { + const struct test_i2c_read_string_dev *p; + int rv; + + for (p = __test_i2c_read_string; p < __test_i2c_read_string_end; ++p) { + rv = p->routine(port, slave_addr, offset, data, len); + if (rv != EC_ERROR_INVAL) + return rv; + } return EC_ERROR_UNKNOWN; } |