ram: px30: add sdram driver

Add the sdram driver for PX30 to support ddr3, ddr4, lpddr2 and lpddr3.

For TPL_BUILD, the driver implement full dram init and without DM
support due to the limit of internal SRAM size.
For SPL and U-Boot proper, it's a simple driver with dm for get
dram_info like other SoCs.

Signed-off-by: YouMin Chen <cym@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/drivers/ram/rockchip/sdram-px30-ddr3-detect-333.inc b/drivers/ram/rockchip/sdram-px30-ddr3-detect-333.inc
new file mode 100644
index 0000000..76cd8dc
--- /dev/null
+++ b/drivers/ram/rockchip/sdram-px30-ddr3-detect-333.inc
@@ -0,0 +1,72 @@
+{
+	{
+		{
+			.rank = 0x1,
+			.col = 0xC,
+			.bk = 0x3,
+			.bw = 0x1,
+			.dbw = 0x0,
+			.row_3_4 = 0x0,
+			.cs0_row = 0x10,
+			.cs1_row = 0x10,
+			.cs0_high16bit_row = 0x10,
+			.cs1_high16bit_row = 0x10,
+			.ddrconfig = 0,
+		},
+		{
+			{0x290b0609},
+			{0x08020401},
+			{0x00000002},
+			{0x00001111},
+			{0x0000000c},
+			{0x00000222},
+			0x000000ff
+		}
+	},
+	{
+		.ddr_freq = 333,
+		.dramtype = DDR3,
+		.num_channels = 1,
+		.stride = 0,
+		.odt = 0,
+	},
+	{
+		{
+			{0x00000000, 0x43041001},	/* MSTR */
+			{0x00000064, 0x0028003b},	/* RFSHTMG */
+			{0x000000d0, 0x00020053},	/* INIT0 */
+			{0x000000d4, 0x00020000},	/* INIT1 */
+			{0x000000d8, 0x00000100},	/* INIT2 */
+			{0x000000dc, 0x03200000},	/* INIT3 */
+			{0x000000e0, 0x00000000},	/* INIT4 */
+			{0x000000e4, 0x00090000},	/* INIT5 */
+			{0x000000f4, 0x000f012f},	/* RANKCTL */
+			{0x00000100, 0x07090b06},	/* DRAMTMG0 */
+			{0x00000104, 0x00050209},	/* DRAMTMG1 */
+			{0x00000108, 0x03030407},	/* DRAMTMG2 */
+			{0x0000010c, 0x00202006},	/* DRAMTMG3 */
+			{0x00000110, 0x03020204},	/* DRAMTMG4 */
+			{0x00000114, 0x03030202},	/* DRAMTMG5 */
+			{0x00000120, 0x00000903},	/* DRAMTMG8 */
+			{0x00000180, 0x00800020},	/* ZQCTL0 */
+			{0x00000184, 0x00000000},	/* ZQCTL1 */
+			{0x00000190, 0x07010001},	/* DFITMG0 */
+			{0x00000198, 0x07000101},	/* DFILPCFG0 */
+			{0x000001a0, 0xc0400003},	/* DFIUPD0 */
+			{0x00000240, 0x06000604},	/* ODTCFG */
+			{0x00000244, 0x00000201},	/* ODTMAP */
+			{0x00000250, 0x00001f00},	/* SCHED */
+			{0x00000490, 0x00000001},	/* PCTRL_0 */
+			{0xffffffff, 0xffffffff}
+		}
+	},
+	{
+		{
+			{0x00000004, 0x0000000a},	/* PHYREG01 */
+			{0x00000028, 0x00000006},	/* PHYREG0A */
+			{0x0000002c, 0x00000000},	/* PHYREG0B */
+			{0x00000030, 0x00000005},	/* PHYREG0C */
+			{0xffffffff, 0xffffffff}
+		}
+	}
+},