From 3f8f24cf82848ef1778f3e1d0a0607d4860dd4f3 Mon Sep 17 00:00:00 2001
From: Alon Rotman <alon.rotman@solid-run.com>
Date: Mon, 22 Nov 2021 13:33:25 +0200
Subject: [PATCH] ddr spd read failover to defualt config

---
 .../octeontx/otx2/t91/t9130/board/dram_port.c | 100 ++++++++++++++++--
 1 file changed, 93 insertions(+), 7 deletions(-)

diff --git a/plat/marvell/octeontx/otx2/t91/t9130/board/dram_port.c b/plat/marvell/octeontx/otx2/t91/t9130/board/dram_port.c
index 82ce07b09..bb7814e9b 100644
--- a/plat/marvell/octeontx/otx2/t91/t9130/board/dram_port.c
+++ b/plat/marvell/octeontx/otx2/t91/t9130/board/dram_port.c
@@ -33,7 +33,7 @@ struct mv_ddr_iface dram_iface_ap0 = {
 	.id = 0,
 	.iface_base_addr = 0,
 	.tm = {
-		DEBUG_LEVEL_ERROR,
+		DEBUG_LEVEL_INFO,
 		0x1, /* active interfaces */
 		/* cs_mask, mirror, dqs_swap, ck_swap X subphys */
 		{ { { {0x1, 0x0, 0, 0},
@@ -45,8 +45,8 @@ struct mv_ddr_iface dram_iface_ap0 = {
 		      {0x1, 0x0, 0, 0},
 		      {0x1, 0x0, 0, 0},
 		      {0x1, 0x0, 0, 0} },
-		   SPEED_BIN_DDR_2400T,		/* speed_bin */
-		   MV_DDR_DEV_WIDTH_8BIT,	/* sdram device width */
+		   SPEED_BIN_DDR_2400R,		/* speed_bin */
+		   MV_DDR_DEV_WIDTH_16BIT,	/* sdram device width */
 		   MV_DDR_DIE_CAP_8GBIT,	/* die capacity */
 		   MV_DDR_FREQ_SAR,		/* frequency */
 		   0, 0,			/* cas_l, cas_wl */
@@ -54,7 +54,8 @@ struct mv_ddr_iface dram_iface_ap0 = {
 #if DDR32
 		MV_DDR_32BIT_ECC_PUP8_BUS_MASK,	/* subphys mask */
 #else
-		MV_DDR_64BIT_ECC_PUP8_BUS_MASK,	/* subphys mask */
+/*		MV_DDR_64BIT_ECC_PUP8_BUS_MASK,	*//* subphys mask */
+		MV_DDR_64BIT_BUS_MASK,
 #endif
 		MV_DDR_CFG_SPD,			/* ddr configuration data src */
 		NOT_COMBINED,			/* ddr twin-die combined*/
@@ -98,6 +99,87 @@ struct mv_ddr_iface dram_iface_ap0 = {
 	},
 };
 
+u8 is_spd_empty_sr(u8 *spd_buffer){
+/* checks the first 196 bytes to check if SPD is has any DDR */
+	u32 i=0;
+	u32 size=MV_DDR_SPD_DATA_BLOCK0_SIZE+MV_DDR_SPD_DATA_BLOCK1M_SIZE;
+	for (i=0; i<size; i++){
+		if (spd_buffer[i] != 0xff) {
+			return 0;
+		}
+	}
+	return 1;
+}
+
+void define_gpio_input_sr (u32 mux_address, u32 direction_address, u8 bit_start_mux, u8 bit_dir_address)
+{
+	u32 mask=0;
+	u32 val;
+	
+	/* define as gpio */
+	val = mmio_read_32 (mux_address);
+	mask |= (0xf << bit_start_mux);
+	mask = ~mask;
+	val &= mask;
+	mmio_write_32(mux_address, val);
+	/*define as input */
+
+	val = mmio_read_32(direction_address);
+	val |= (1 << bit_dir_address);
+	mmio_write_32(direction_address, val);
+
+	/*all is standard polarity  by defualt */
+}
+
+u8 read_gpio_strap_sr (u32 addr, u8 bit_loc)
+{
+	u32 val;
+
+	val=mmio_read_32 (addr);
+	val &= (0x1<<bit_loc);
+	printf("\nDDR Strap %d, value is %d\n", bit_loc, val != 0);
+
+	if (!val)
+		return (u8) 0;
+	
+	return (u8) 1;
+	
+}
+
+void set_param_based_on_som_strap (){
+	/*	sample GPIOs 10, 11
+	 *	MPP10: 1-ECC /0-noECC
+	 *	MPP11: 1-4Gb /0-8Gb per component
+	 */
+
+	/*defining MPP[11:10] as gpio inputs*/
+	define_gpio_input_sr (0xf2440004, 0xf2440100, 8, 10);	
+	define_gpio_input_sr (0xf2440004, 0xf2440100, 12,11);
+
+	/*after SPD read failed, defining as DEFAULT configuration*/
+	dram_iface_ap0.tm.cfg_src = MV_DDR_CFG_DEFAULT;
+ 
+	/* read gpio value to check if ECC exist or not */
+	if (read_gpio_strap_sr ((u32) 0xf2440110, (u8) 10)){
+		printf("ecc strap value=1\n\n");
+	       	dram_iface_ap0.tm.bus_act_mask=MV_DDR_64BIT_ECC_PUP8_BUS_MASK;
+	}
+	else {
+		dram_iface_ap0.tm.bus_act_mask=MV_DDR_64BIT_BUS_MASK;
+		printf("ecc strap value=0\n\n");
+	}
+	/* read gpio value to check 4GB or 8GB configuration */
+	if (!read_gpio_strap_sr ((u32) 0xf2440110, (u8) 11)){ 
+		dram_iface_ap0.tm.interface_params[0].memory_size=MV_DDR_DIE_CAP_8GBIT;
+		printf("die capacity strap value=1\n\n");
+	}
+	else{
+		dram_iface_ap0.tm.interface_params[0].memory_size=MV_DDR_DIE_CAP_4GBIT;
+		printf("die capacity strap value=1\n\n");
+	}
+}
+
+
 /* Pointer to the first DRAM interface in the system */
 struct mv_ddr_iface *ptr_iface = &dram_iface_ap0;
 
@@ -109,7 +191,7 @@ struct mv_ddr_iface *mv_ddr_iface_get(void)
 
 struct mv_ddr_topology_map *mv_ddr_topology_map_get(void)
 {
-	/* Return the board topology as defined in the board code */
+/* Return the board topology as defined in the board code */
 	return &ptr_iface->tm;
 }
 
@@ -135,6 +217,8 @@ static void mpp_config(void)
  * based on information received from SPD or bootloader
  * configuration located on non volatile storage
  */
+
+
 void plat_marvell_dram_update_topology(void)
 {
 	struct mv_ddr_topology_map *tm = mv_ddr_topology_map_get();
@@ -152,7 +236,9 @@ void plat_marvell_dram_update_topology(void)
 		i2c_write(I2C_SPD_P0_ADDR, 0x0, 1, tm->spd_data.all_bytes, 0);
 
 		/* read data from spd */
-		i2c_read(I2C_SPD_ADDR, 0x0, 1, tm->spd_data.all_bytes,
-			 sizeof(tm->spd_data.all_bytes));
+		i2c_read(I2C_SPD_ADDR, 0x0, 1, tm->spd_data.all_bytes,sizeof(tm->spd_data.all_bytes));
+		/* if SPD is empty, then copy default configuration as SPD */
+		if (is_spd_empty_sr(tm->spd_data.all_bytes)) 
+			set_param_based_on_som_strap();
 	}
 }