diff options
Diffstat (limited to 'package/boot/uboot-layerscape/patches/0071-driver-fsl_qspi-disable-AHB-buffer-prefetch.patch')
| -rw-r--r-- | package/boot/uboot-layerscape/patches/0071-driver-fsl_qspi-disable-AHB-buffer-prefetch.patch | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/package/boot/uboot-layerscape/patches/0071-driver-fsl_qspi-disable-AHB-buffer-prefetch.patch b/package/boot/uboot-layerscape/patches/0071-driver-fsl_qspi-disable-AHB-buffer-prefetch.patch new file mode 100644 index 0000000..a7cb7b4 --- /dev/null +++ b/package/boot/uboot-layerscape/patches/0071-driver-fsl_qspi-disable-AHB-buffer-prefetch.patch @@ -0,0 +1,58 @@ +From e2a5bba97cd6e42b2b631bd17012aa26ffdb5f67 Mon Sep 17 00:00:00 2001 +From: Yunhui Cui <yunhui.cui@nxp.com> +Date: Tue, 12 Jul 2016 10:30:08 +0800 +Subject: [PATCH 71/93] driver: fsl_qspi: disable AHB buffer prefetch + +Errata: A-009282: QuadSPI data pre-fetch can result in incorrect data +When we enable the CONFIG_SYS_FSL_QSPI_AHB, we need this errata workaround. + +Signed-off-by: Yunhui Cui <yunhui.cui@nxp.com> +--- + drivers/spi/fsl_qspi.c | 12 +++++++++++- + include/configs/ls1012a_common.h | 1 + + 2 files changed, 12 insertions(+), 1 deletion(-) + +diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c +index 09759fa..f1c87f5 100644 +--- a/drivers/spi/fsl_qspi.c ++++ b/drivers/spi/fsl_qspi.c +@@ -441,13 +441,23 @@ static void qspi_enable_ddr_mode(struct fsl_qspi_priv *priv) + static void qspi_init_ahb_read(struct fsl_qspi_priv *priv) + { + struct fsl_qspi_regs *regs = priv->regs; ++ int rx_size = 0x80; + + /* AHB configuration for access buffer 0/1/2 .*/ + qspi_write32(priv->flags, ®s->buf0cr, QSPI_BUFXCR_INVALID_MSTRID); + qspi_write32(priv->flags, ®s->buf1cr, QSPI_BUFXCR_INVALID_MSTRID); + qspi_write32(priv->flags, ®s->buf2cr, QSPI_BUFXCR_INVALID_MSTRID); ++ ++#ifdef CONFIG_SYS_FSL_ERRATUM_A009282 ++ /*A-009282: QuadSPI data pre-fetch can result in incorrect data ++ *Workaround: Keep the read data size to 64 bits (8 Bytes), which ++ *disables the prefetch on the AHB buffer,and prevents this issue ++ *from occurring. ++ */ ++ rx_size = 0x1; ++#endif + qspi_write32(priv->flags, ®s->buf3cr, QSPI_BUF3CR_ALLMST_MASK | +- (0x80 << QSPI_BUF3CR_ADATSZ_SHIFT)); ++ (rx_size << QSPI_BUF3CR_ADATSZ_SHIFT)); + + /* We only use the buffer3 */ + qspi_write32(priv->flags, ®s->buf0ind, 0); +diff --git a/include/configs/ls1012a_common.h b/include/configs/ls1012a_common.h +index 47b8ec3..f0ae355 100644 +--- a/include/configs/ls1012a_common.h ++++ b/include/configs/ls1012a_common.h +@@ -68,6 +68,7 @@ + #define FSL_QSPI_FLASH_SIZE (1 << 26) + #define FSL_QSPI_FLASH_NUM 2 + #define CONFIG_SYS_FSL_QSPI_AHB ++#define CONFIG_SYS_FSL_ERRATUM_A009282 + + /* + * Environment +-- +1.7.9.5 + |