From 1110495de926db4b21b9969da522e5270c67f115 Mon Sep 17 00:00:00 2001 From: Kyösti Mälkki Date: Sun, 29 Jun 2014 16:17:33 +0300 Subject: SPI: Split writes using spi_crop_chunk() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit SPI controllers in Intel and AMD bridges have a slightly different restriction on how long transactions they can handle. Change-Id: I3d149d4b7e7e9633482a153d5e380a86c553d871 Signed-off-by: Kyösti Mälkki Reviewed-on: http://review.coreboot.org/6163 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan --- src/southbridge/intel/common/spi.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'src/southbridge/intel/common') diff --git a/src/southbridge/intel/common/spi.c b/src/southbridge/intel/common/spi.c index 76fd22691f..8e7192b49f 100644 --- a/src/southbridge/intel/common/spi.c +++ b/src/southbridge/intel/common/spi.c @@ -550,6 +550,11 @@ static int spi_is_multichip (void) return !!((cntlr.flmap0 >> 8) & 3); } +unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len) +{ + return min(cntlr.databytes, buf_len); +} + int spi_xfer(struct spi_slave *slave, const void *dout, unsigned int bytesout, void *din, unsigned int bytesin) { @@ -639,7 +644,7 @@ int spi_xfer(struct spi_slave *slave, const void *dout, */ if (trans.bytesout > cntlr.databytes) { printk(BIOS_DEBUG, "ICH SPI: Too much to write. Does your SPI chip driver use" - " CONTROLLER_PAGE_LIMIT?\n"); + " spi_crop_chunk()?\n"); return -1; } -- cgit v1.2.3