[U-Boot] [PATCH v3 4/6] dm: ram: bmips: add BCM6338/BCM6348 support

[Álvaro Fernández Rojas]

Signed-off-by: Álvaro Fernández Rojas <noltari at gmail.com>
Reviewed-by: Simon Glass <sjg at chromium.org>
---
 v3: no changes.
 v2: "dm: ram" driver instead of cpu.

 drivers/ram/bmips_ram.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/ram/bmips_ram.c b/drivers/ram/bmips_ram.c
index 382e231..ac35fbe 100644
--- a/drivers/ram/bmips_ram.c
+++ b/drivers/ram/bmips_ram.c
@@ -14,6 +14,16 @@
 #include <asm/io.h>
 #include <dm/device.h>
 
+#define SDRAM_CFG_REG		0x0
+#define SDRAM_CFG_COL_SHIFT	4
+#define SDRAM_CFG_COL_MASK	(0x3 << SDRAM_CFG_COL_SHIFT)
+#define SDRAM_CFG_ROW_SHIFT	6
+#define SDRAM_CFG_ROW_MASK	(0x3 << SDRAM_CFG_ROW_SHIFT)
+#define SDRAM_CFG_32B_SHIFT	10
+#define SDRAM_CFG_32B_MASK	(1 << SDRAM_CFG_32B_SHIFT)
+#define SDRAM_CFG_BANK_SHIFT	13
+#define SDRAM_CFG_BANK_MASK	(1 << SDRAM_CFG_BANK_SHIFT)
+
 #define MEMC_CFG_REG		0x4
 #define MEMC_CFG_32B_SHIFT	1
 #define MEMC_CFG_32B_MASK	(1 << MEMC_CFG_32B_SHIFT)
@@ -50,6 +60,20 @@ static ulong bmips_dram_size(unsigned int cols, unsigned int rows,
 	return 1 << (cols + rows + is_32b + banks);
 }
 
+static ulong bcm6338_get_ram_size(struct bmips_ram_priv *priv)
+{
+	unsigned int cols = 0, rows = 0, is_32b = 0, banks = 0;
+	u32 val;
+
+	val = readl_be(priv->regs + SDRAM_CFG_REG);
+	rows = (val & SDRAM_CFG_ROW_MASK) >> SDRAM_CFG_ROW_SHIFT;
+	cols = (val & SDRAM_CFG_COL_MASK) >> SDRAM_CFG_COL_SHIFT;
+	is_32b = (val & SDRAM_CFG_32B_MASK) ? 1 : 0;
+	banks = (val & SDRAM_CFG_BANK_MASK) ? 2 : 1;
+
+	return bmips_dram_size(cols, rows, is_32b, banks);
+}
+
 static ulong bcm6358_get_ram_size(struct bmips_ram_priv *priv)
 {
 	unsigned int cols = 0, rows = 0, is_32b = 0;
@@ -82,6 +106,10 @@ static const struct bmips_ram_hw bmips_ram_bcm6328 = {
 	.get_ram_size = bcm6328_get_ram_size,
 };
 
+static const struct bmips_ram_hw bmips_ram_bcm6338 = {
+	.get_ram_size = bcm6338_get_ram_size,
+};
+
 static const struct bmips_ram_hw bmips_ram_bcm6358 = {
 	.get_ram_size = bcm6358_get_ram_size,
 };
@@ -91,6 +119,9 @@ static const struct udevice_id bmips_ram_ids[] = {
 		.compatible = "brcm,bcm6328-mc",
 		.data = (ulong)&bmips_ram_bcm6328,
 	}, {
+		.compatible = "brcm,bcm6338-mc",
+		.data = (ulong)&bmips_ram_bcm6338,
+	}, {
 		.compatible = "brcm,bcm6358-mc",
 		.data = (ulong)&bmips_ram_bcm6358,
 	}, { /* sentinel */ }
-- 
2.1.4