Merge branch 'master' of git://git.denx.de/u-boot-ti

2 files changed, 211 insertions, 0 deletions

diff --git a/drivers/soc/keystone/Makefile b/drivers/soc/keystone/Makefile
new file mode 100644
index 0000000..c000eca
--- /dev/null
+++ b/drivers/soc/keystone/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_TI_KEYSTONE_SERDES) += keystone_serdes.o
diff --git a/drivers/soc/keystone/keystone_serdes.c b/drivers/soc/keystone/keystone_serdes.c
new file mode 100644
index 0000000..dd5eac9
--- /dev/null
+++ b/drivers/soc/keystone/keystone_serdes.c
@@ -0,0 +1,210 @@
+/*
+ * TI serdes driver for keystone2.
+ *
+ * (C) Copyright 2014
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <errno.h>
+#include <common.h>
+#include <asm/ti-common/keystone_serdes.h>
+
+#define SERDES_CMU_REGS(x)		(0x0000 + (0x0c00 * (x)))
+#define SERDES_LANE_REGS(x)		(0x0200 + (0x200 * (x)))
+#define SERDES_COMLANE_REGS		0x0a00
+#define SERDES_WIZ_REGS			0x1fc0
+
+#define SERDES_CMU_REG_000(x)		(SERDES_CMU_REGS(x) + 0x000)
+#define SERDES_CMU_REG_010(x)		(SERDES_CMU_REGS(x) + 0x010)
+#define SERDES_COMLANE_REG_000		(SERDES_COMLANE_REGS + 0x000)
+#define SERDES_LANE_REG_000(x)		(SERDES_LANE_REGS(x) + 0x000)
+#define SERDES_LANE_REG_028(x)		(SERDES_LANE_REGS(x) + 0x028)
+#define SERDES_LANE_CTL_STATUS_REG(x)	(SERDES_WIZ_REGS + 0x0020 + (4 * (x)))
+#define SERDES_PLL_CTL_REG		(SERDES_WIZ_REGS + 0x0034)
+
+#define SERDES_RESET			BIT(28)
+#define SERDES_LANE_RESET		BIT(29)
+#define SERDES_LANE_LOOPBACK		BIT(30)
+#define SERDES_LANE_EN_VAL(x, y, z)	(x[y] | (z << 26) | (z << 10))
+
+#define SERDES_CMU_CFG_NUM		5
+#define SERDES_COMLANE_CFG_NUM		10
+#define SERDES_LANE_CFG_NUM		10
+
+struct serdes_cfg {
+	u32 ofs;
+	u32 val;
+	u32 mask;
+};
+
+struct cfg_entry {
+	enum ks2_serdes_clock clk;
+	enum ks2_serdes_rate rate;
+	struct serdes_cfg cmu[SERDES_CMU_CFG_NUM];
+	struct serdes_cfg comlane[SERDES_COMLANE_CFG_NUM];
+	struct serdes_cfg lane[SERDES_LANE_CFG_NUM];
+};
+
+/* SERDES PHY lane enable configuration value, indexed by PHY interface */
+static u32 serdes_cfg_lane_enable[] = {
+	0xf000f0c0,     /* SGMII */
+	0xf0e9f038,     /* PCSR */
+};
+
+/* SERDES PHY PLL enable configuration value, indexed by PHY interface  */
+static u32 serdes_cfg_pll_enable[] = {
+	0xe0000000,     /* SGMII */
+	0xee000000,     /* PCSR */
+};
+
+/**
+ * Array to hold all possible serdes configurations.
+ * Combination for 5 clock settings and 6 baud rates.
+ */
+static struct cfg_entry cfgs[] = {
+	{
+		.clk = SERDES_CLOCK_156P25M,
+		.rate = SERDES_RATE_5G,
+		.cmu = {
+			{0x0000, 0x00800000, 0xffff0000},
+			{0x0014, 0x00008282, 0x0000ffff},
+			{0x0060, 0x00142438, 0x00ffffff},
+			{0x0064, 0x00c3c700, 0x00ffff00},
+			{0x0078, 0x0000c000, 0x0000ff00}
+		},
+		.comlane = {
+			{0x0a00, 0x00000800, 0x0000ff00},
+			{0x0a08, 0x38a20000, 0xffff0000},
+			{0x0a30, 0x008a8a00, 0x00ffff00},
+			{0x0a84, 0x00000600, 0x0000ff00},
+			{0x0a94, 0x10000000, 0xff000000},
+			{0x0aa0, 0x81000000, 0xff000000},
+			{0x0abc, 0xff000000, 0xff000000},
+			{0x0ac0, 0x0000008b, 0x000000ff},
+			{0x0b08, 0x583f0000, 0xffff0000},
+			{0x0b0c, 0x0000004e, 0x000000ff}
+		},
+		.lane = {
+			{0x0004, 0x38000080, 0xff0000ff},
+			{0x0008, 0x00000000, 0x000000ff},
+			{0x000c, 0x02000000, 0xff000000},
+			{0x0010, 0x1b000000, 0xff000000},
+			{0x0014, 0x00006fb8, 0x0000ffff},
+			{0x0018, 0x758000e4, 0xffff00ff},
+			{0x00ac, 0x00004400, 0x0000ff00},
+			{0x002c, 0x00100800, 0x00ffff00},
+			{0x0080, 0x00820082, 0x00ff00ff},
+			{0x0084, 0x1d0f0385, 0xffffffff}
+		},
+	},
+};
+
+static inline void ks2_serdes_rmw(u32 addr, u32 value, u32 mask)
+{
+	writel(((readl(addr) & (~mask)) | (value & mask)), addr);
+}
+
+static void ks2_serdes_cfg_setup(u32 base, struct serdes_cfg *cfg, u32 size)
+{
+	u32 i;
+
+	for (i = 0; i < size; i++)
+		ks2_serdes_rmw(base + cfg[i].ofs, cfg[i].val, cfg[i].mask);
+}
+
+static void ks2_serdes_lane_config(u32 base, struct serdes_cfg *cfg_lane,
+				   u32 size, u32 lane)
+{
+	u32 i;
+
+	for (i = 0; i < size; i++)
+		ks2_serdes_rmw(base + cfg_lane[i].ofs + SERDES_LANE_REGS(lane),
+			       cfg_lane[i].val, cfg_lane[i].mask);
+}
+
+static int ks2_serdes_init_cfg(u32 base, struct cfg_entry *cfg, u32 num_lanes)
+{
+	u32 i;
+
+	ks2_serdes_cfg_setup(base, cfg->cmu, SERDES_CMU_CFG_NUM);
+	ks2_serdes_cfg_setup(base, cfg->comlane, SERDES_COMLANE_CFG_NUM);
+
+	for (i = 0; i < num_lanes; i++)
+		ks2_serdes_lane_config(base, cfg->lane, SERDES_LANE_CFG_NUM, i);
+
+	return 0;
+}
+
+static void ks2_serdes_cmu_comlane_enable(u32 base, struct ks2_serdes *serdes)
+{
+	/* Bring SerDes out of Reset */
+	ks2_serdes_rmw(base + SERDES_CMU_REG_010(0), 0x0, SERDES_RESET);
+	if (serdes->intf == SERDES_PHY_PCSR)
+		ks2_serdes_rmw(base + SERDES_CMU_REG_010(1), 0x0, SERDES_RESET);
+
+	/* Enable CMU and COMLANE */
+	ks2_serdes_rmw(base + SERDES_CMU_REG_000(0), 0x03, 0x000000ff);
+	if (serdes->intf == SERDES_PHY_PCSR)
+		ks2_serdes_rmw(base + SERDES_CMU_REG_000(1), 0x03, 0x000000ff);
+
+	ks2_serdes_rmw(base + SERDES_COMLANE_REG_000, 0x5f, 0x000000ff);
+}
+
+static void ks2_serdes_pll_enable(u32 base, struct ks2_serdes *serdes)
+{
+	writel(serdes_cfg_pll_enable[serdes->intf],
+	       base + SERDES_PLL_CTL_REG);
+}
+
+static void ks2_serdes_lane_reset(u32 base, u32 reset, u32 lane)
+{
+	if (reset)
+		ks2_serdes_rmw(base + SERDES_LANE_REG_028(lane),
+			       0x1, SERDES_LANE_RESET);
+	else
+		ks2_serdes_rmw(base + SERDES_LANE_REG_028(lane),
+			       0x0, SERDES_LANE_RESET);
+}
+
+static void ks2_serdes_lane_enable(u32 base,
+				   struct ks2_serdes *serdes, u32 lane)
+{
+	/* Bring lane out of reset */
+	ks2_serdes_lane_reset(base, 0, lane);
+
+	writel(SERDES_LANE_EN_VAL(serdes_cfg_lane_enable, serdes->intf,
+				  serdes->rate_mode),
+	       base + SERDES_LANE_CTL_STATUS_REG(lane));
+
+	/* Set NES bit if Loopback Enabled */
+	if (serdes->loopback)
+		ks2_serdes_rmw(base + SERDES_LANE_REG_000(lane),
+			       0x1, SERDES_LANE_LOOPBACK);
+}
+
+int ks2_serdes_init(u32 base, struct ks2_serdes *serdes, u32 num_lanes)
+{
+	int i;
+	int ret = 0;
+
+	for (i = 0; i < ARRAY_SIZE(cfgs); i++)
+		if (serdes->clk == cfgs[i].clk && serdes->rate == cfgs[i].rate)
+			break;
+
+	if (i >= ARRAY_SIZE(cfgs)) {
+		puts("Cannot find keystone SerDes configuration");
+		return -EINVAL;
+	}
+
+	ks2_serdes_init_cfg(base, &cfgs[i], num_lanes);
+
+	ks2_serdes_cmu_comlane_enable(base, serdes);
+	for (i = 0; i < num_lanes; i++)
+		ks2_serdes_lane_enable(base, serdes, i);
+
+	ks2_serdes_pll_enable(base, serdes);
+
+	return ret;
+}