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drivers/spi: Re-factor spi_crop_chunk

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spi_crop_chunk is a property of the SPI controller since it depends
upon the maximum transfer size that is supported by the
controller. Also, it is possible to implement this within spi-generic
layer by obtaining following parameters from the controller:

1. max_xfer_size: Maximum transfer size supported by the controller
(Size of 0 indicates invalid size, and unlimited transfer size is
indicated by UINT32_MAX.)

2. deduct_cmd_len: Whether cmd_len needs to be deducted from the
max_xfer_size to determine max data size that can be
transferred. (This is used by the amd boards.)

Change-Id: I81c199413f879c664682088e93bfa3f91c6a46e5
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/19386
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Tested-by: coreboot org <coreboot.org@gmail.com>
This commit is contained in:
Furquan Shaikh
2017-04-19 19:27:28 -07:00
committed by Martin Roth
parent f1db5fdb4d
commit de705fa1f4
37 changed files with 92 additions and 119 deletions
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4
src/drivers/spi/spiconsole.c
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@@ -46,7 +46,7 @@ void spiconsole_tx_byte(unsigned char c) {
};
/* Verify the spi buffer is big enough to send even a single byte */
if (spi_crop_chunk(0,MAX_MSG_LENGTH) <
if (spi_crop_chunk(&slave, 0, MAX_MSG_LENGTH) <
sizeof(struct em100_msg_header) + 1)
return;
@@ -55,7 +55,7 @@ void spiconsole_tx_byte(unsigned char c) {
/* Send the data on newline or when the max spi length is reached */
if (c == '\n' || (sizeof(struct em100_msg_header) +
msg.header.msg_length == spi_crop_chunk(0,
msg.header.msg_length == spi_crop_chunk(&slave, 0,
MAX_MSG_LENGTH))) {
spi_xfer(&slave, &msg, sizeof(struct em100_msg_header) +
msg.header.msg_length, NULL, 0);