diff options
Diffstat (limited to 'common/spi_commands.c')
-rw-r--r-- | common/spi_commands.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/common/spi_commands.c b/common/spi_commands.c new file mode 100644 index 0000000000..7935bab216 --- /dev/null +++ b/common/spi_commands.c @@ -0,0 +1,65 @@ +/* + * Copyright 2015 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * SPI transfer command for debugging SPI devices. + */ + +#include "common.h" +#include "console.h" +#include "spi.h" +#include "util.h" + +static int command_spixfer(int argc, char **argv) +{ + int dev_id; + uint8_t offset; + int v = 0; + uint8_t data[32]; + char *e; + int rv = 0; + + if (argc != 5) + return EC_ERROR_PARAM_COUNT; + + dev_id = strtoi(argv[2], &e, 0); + if (*e) + return EC_ERROR_PARAM2; + + offset = strtoi(argv[3], &e, 0); + if (*e) + return EC_ERROR_PARAM3; + + v = strtoi(argv[4], &e, 0); + if (*e) + return EC_ERROR_PARAM4; + + if (strcasecmp(argv[1], "rlen") == 0) { + uint8_t cmd = 0x80 | offset; + + /* Arbitrary length read; param4 = len */ + if (v < 0 || v > sizeof(data)) + return EC_ERROR_PARAM4; + + rv = spi_transaction(&spi_devices[dev_id], &cmd, 1, data, v); + + if (!rv) + ccprintf("Data: %.*h\n", v, data); + + } else if (strcasecmp(argv[1], "w") == 0) { + /* 8-bit write */ + uint8_t cmd[2] = { offset, v }; + + rv = spi_transaction(&spi_devices[dev_id], cmd, 2, NULL, 0); + } else { + return EC_ERROR_PARAM1; + } + + return rv; +} +DECLARE_CONSOLE_COMMAND(spixfer, command_spixfer, + "rlen/w id offset [value | len]", + "Read write spi. id is spi_devices array index", + NULL); + |