arm: Tegra2: Add basic NVIDIA Tegra2 SoC support

Signed-off-by: Tom Warren <twarren@nvidia.com>

1 files changed, 193 insertions, 0 deletions

diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c
new file mode 100644
index 0000000..b2c412c
--- /dev/null
+++ b/board/nvidia/common/board.c
@@ -0,0 +1,193 @@
+/*
+ *  (C) Copyright 2010,2011
+ *  NVIDIA Corporation <www.nvidia.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <ns16550.h>
+#include <asm/io.h>
+#include <asm/arch/tegra2.h>
+#include <asm/arch/sys_proto.h>
+
+#include <asm/arch/clk_rst.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/uart.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+const struct tegra2_sysinfo sysinfo = {
+	CONFIG_TEGRA2_BOARD_STRING
+};
+
+/*
+ * Routine: timer_init
+ * Description: init the timestamp and lastinc value
+ */
+int timer_init(void)
+{
+	reset_timer();
+	return 0;
+}
+
+/*
+ * Routine: clock_init_uart
+ * Description: init the PLL and clock for the UART(s)
+ */
+static void clock_init_uart(void)
+{
+	struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+	static int pllp_init_done;
+	u32 reg;
+
+	if (!pllp_init_done) {
+		/* Override pllp setup for 216MHz operation. */
+		reg = (PLL_BYPASS | PLL_BASE_OVRRIDE | PLL_DIVP);
+		reg |= (((NVRM_PLLP_FIXED_FREQ_KHZ/500) << 8) | PLL_DIVM);
+		writel(reg, &clkrst->crc_pllp_base);
+
+		reg |= PLL_ENABLE;
+		writel(reg, &clkrst->crc_pllp_base);
+
+		reg &= ~PLL_BYPASS;
+		writel(reg, &clkrst->crc_pllp_base);
+
+		pllp_init_done++;
+	}
+
+	/* Now do the UART reset/clock enable */
+#if defined(CONFIG_TEGRA2_ENABLE_UARTA)
+	/* Assert Reset to UART */
+	reg = readl(&clkrst->crc_rst_dev_l);
+	reg |= SWR_UARTA_RST;		/* SWR_UARTA_RST = 1 */
+	writel(reg, &clkrst->crc_rst_dev_l);
+
+	/* Enable clk to UART */
+	reg = readl(&clkrst->crc_clk_out_enb_l);
+	reg |= CLK_ENB_UARTA;		/* CLK_ENB_UARTA = 1 */
+	writel(reg, &clkrst->crc_clk_out_enb_l);
+
+	/* Enable pllp_out0 to UART */
+	reg = readl(&clkrst->crc_clk_src_uarta);
+	reg &= 0x3FFFFFFF;	/* UARTA_CLK_SRC = 00, PLLP_OUT0 */
+	writel(reg, &clkrst->crc_clk_src_uarta);
+
+	/* wait for 2us */
+	udelay(2);
+
+	/* De-assert reset to UART */
+	reg = readl(&clkrst->crc_rst_dev_l);
+	reg &= ~SWR_UARTA_RST;		/* SWR_UARTA_RST = 0 */
+	writel(reg, &clkrst->crc_rst_dev_l);
+#endif	/* CONFIG_TEGRA2_ENABLE_UARTA */
+#if defined(CONFIG_TEGRA2_ENABLE_UARTD)
+	/* Assert Reset to UART */
+	reg = readl(&clkrst->crc_rst_dev_u);
+	reg |= SWR_UARTD_RST;		/* SWR_UARTD_RST = 1 */
+	writel(reg, &clkrst->crc_rst_dev_u);
+
+	/* Enable clk to UART */
+	reg = readl(&clkrst->crc_clk_out_enb_u);
+	reg |= CLK_ENB_UARTD;		/* CLK_ENB_UARTD = 1 */
+	writel(reg, &clkrst->crc_clk_out_enb_u);
+
+	/* Enable pllp_out0 to UART */
+	reg = readl(&clkrst->crc_clk_src_uartd);
+	reg &= 0x3FFFFFFF;	/* UARTD_CLK_SRC = 00, PLLP_OUT0 */
+	writel(reg, &clkrst->crc_clk_src_uartd);
+
+	/* wait for 2us */
+	udelay(2);
+
+	/* De-assert reset to UART */
+	reg = readl(&clkrst->crc_rst_dev_u);
+	reg &= ~SWR_UARTD_RST;		/* SWR_UARTD_RST = 0 */
+	writel(reg, &clkrst->crc_rst_dev_u);
+#endif	/* CONFIG_TEGRA2_ENABLE_UARTD */
+}
+
+/*
+ * Routine: pin_mux_uart
+ * Description: setup the pin muxes/tristate values for the UART(s)
+ */
+static void pin_mux_uart(void)
+{
+	struct pmux_tri_ctlr *pmt = (struct pmux_tri_ctlr *)NV_PA_APB_MISC_BASE;
+	u32 reg;
+
+#if defined(CONFIG_TEGRA2_ENABLE_UARTA)
+	reg = readl(&pmt->pmt_ctl_c);
+	reg &= 0xFFF0FFFF;	/* IRRX_/IRTX_SEL [19:16] = 00 UARTA */
+	writel(reg, &pmt->pmt_ctl_c);
+
+	reg = readl(&pmt->pmt_tri_a);
+	reg &= ~Z_IRRX;		/* Z_IRRX = normal (0) */
+	reg &= ~Z_IRTX;		/* Z_IRTX = normal (0) */
+	writel(reg, &pmt->pmt_tri_a);
+#endif	/* CONFIG_TEGRA2_ENABLE_UARTA */
+#if defined(CONFIG_TEGRA2_ENABLE_UARTD)
+	reg = readl(&pmt->pmt_ctl_b);
+	reg &= 0xFFFFFFF3;	/* GMC_SEL [3:2] = 00, UARTD */
+	writel(reg, &pmt->pmt_ctl_b);
+
+	reg = readl(&pmt->pmt_tri_a);
+	reg &= ~Z_GMC;		/* Z_GMC = normal (0) */
+	writel(reg, &pmt->pmt_tri_a);
+#endif	/* CONFIG_TEGRA2_ENABLE_UARTD */
+}
+
+/*
+ * Routine: clock_init
+ * Description: Do individual peripheral clock reset/enables
+ */
+void clock_init(void)
+{
+	clock_init_uart();
+}
+
+/*
+ * Routine: pinmux_init
+ * Description: Do individual peripheral pinmux configs
+ */
+void pinmux_init(void)
+{
+	pin_mux_uart();
+}
+
+/*
+ * Routine: board_init
+ * Description: Early hardware init.
+ */
+int board_init(void)
+{
+	/* boot param addr */
+	gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);
+	/* board id for Linux */
+	gd->bd->bi_arch_number = CONFIG_MACH_TYPE;
+
+	/* Initialize peripheral clocks */
+	clock_init();
+
+	/* Initialize periph pinmuxes */
+	pinmux_init();
+
+	return 0;
+}
+