[U-Boot] [PATCH] armv8: ls1088ardb: support force SDHC mode by hwconfig

[Yangbo Lu]

The BRDCFG5[SPISDHC] register field of Qixis device is used
to control SPI and SDHC signal routing.

10 = Force SDHC Mode
  - SPI_CS[0] is routed to CPLD for SDHC_VS use.
  - SPI_CS[1] is unused.
  - SPI_CS[2:3] are routed to the TDMRiser slot.

11 = Force eMMC Mode
  - SPI_CS[0:3] are routed to the eMMC card.

0X = Auto Mode
  - If SDHC_CS_B=0 (SDHC card installed): Use SDHC mode
    described above.
  - Else SDHC_CS_B=1 (no SDHC card installed): Use eMMC
    mode described above.

In default the hardware uses auto mode, but sometimes we need
to use force SDHC mode to support SD card hotplug, or SD sleep
waking up in kernel. This patch is to support force SDHC mode
by hwconfig.

Signed-off-by: Yangbo Lu <yangbo.lu at nxp.com>
---
 board/freescale/ls1088a/ls1088a.c       | 18 ++++++++++++++++++
 board/freescale/ls1088a/ls1088a_qixis.h |  6 ++++++
 include/configs/ls1088ardb.h            |  2 ++
 3 files changed, 26 insertions(+)

diff --git a/board/freescale/ls1088a/ls1088a.c b/board/freescale/ls1088a/ls1088a.c
index 96d9ae7f1d..60f40edb5a 100644
--- a/board/freescale/ls1088a/ls1088a.c
+++ b/board/freescale/ls1088a/ls1088a.c
@@ -18,6 +18,7 @@
 #include <environment.h>
 #include <asm/arch-fsl-layerscape/soc.h>
 #include <asm/arch/ppa.h>
+#include <hwconfig.h>
 
 #include "../common/qixis.h"
 #include "ls1088a_qixis.h"
@@ -296,6 +297,23 @@ void board_retimer_init(void)
 	select_i2c_ch_pca9547(I2C_MUX_CH_DEFAULT);
 }
 
+#ifdef CONFIG_MISC_INIT_R
+int misc_init_r(void)
+{
+#ifdef CONFIG_TARGET_LS1088ARDB
+	u8 brdcfg5;
+
+	if (hwconfig("esdhc-force-sd")) {
+		brdcfg5 = QIXIS_READ(brdcfg[5]);
+		brdcfg5 &= ~BRDCFG5_SPISDHC_MASK;
+		brdcfg5 |= BRDCFG5_FORCE_SD;
+		QIXIS_WRITE(brdcfg[5], brdcfg5);
+	}
+#endif
+	return 0;
+}
+#endif
+
 int board_init(void)
 {
 	init_final_memctl_regs();
diff --git a/board/freescale/ls1088a/ls1088a_qixis.h b/board/freescale/ls1088a/ls1088a_qixis.h
index 4790461b47..6cad396cff 100644
--- a/board/freescale/ls1088a/ls1088a_qixis.h
+++ b/board/freescale/ls1088a/ls1088a_qixis.h
@@ -36,4 +36,10 @@
 #define BRDCFG9_SFPTX_MASK		0x10
 #define BRDCFG9_SFPTX_SHIFT		4
 
+/* Definitions of QIXIS Registers for LS1088ARDB */
+
+/* BRDCFG5 */
+#define BRDCFG5_SPISDHC_MASK		0x0C
+#define BRDCFG5_FORCE_SD		0x08
+
 #endif
diff --git a/include/configs/ls1088ardb.h b/include/configs/ls1088ardb.h
index e6bf2b8d87..f7b502d1b0 100644
--- a/include/configs/ls1088ardb.h
+++ b/include/configs/ls1088ardb.h
@@ -11,6 +11,8 @@
 
 #define CONFIG_DISPLAY_BOARDINFO_LATE
 
+#define CONFIG_MISC_INIT_R
+
 #if defined(CONFIG_QSPI_BOOT)
 #define CONFIG_ENV_SIZE			0x2000          /* 8KB */
 #define CONFIG_ENV_OFFSET		0x300000        /* 3MB */
-- 
2.14.1