Patchwork [U-Boot,3/3] arm: Tegra2: Move clk/mux init to board_early_init_f, add GPIO init

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Submitter Tom Warren
Date April 13, 2011, 8:07 p.m.
Message ID <1302725258-28539-4-git-send-email-twarren@nvidia.com>
Download mbox | patch
Permalink /patch/91104/
State Accepted
Commit f4ef66685a6cdca6e5b3a8b2f199789f5d94320a
Headers show

Comments

Tom Warren - April 13, 2011, 8:07 p.m.
Signed-off-by: Tom Warren <twarren@nvidia.com>
---
 board/nvidia/common/board.c      |   32 +++++++++++++++--------
 board/nvidia/common/board.h      |    4 +++
 board/nvidia/harmony/Makefile    |    1 +
 board/nvidia/harmony/harmony.c   |   34 ++++++++++++++++++++++++
 board/nvidia/seaboard/Makefile   |    1 +
 board/nvidia/seaboard/seaboard.c |   52 ++++++++++++++++++++++++++++++++++++++
 6 files changed, 113 insertions(+), 11 deletions(-)
 create mode 100644 board/nvidia/harmony/harmony.c
 create mode 100644 board/nvidia/seaboard/seaboard.c

Patch

diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c
index 5edd70f..3d6c248 100644
--- a/board/nvidia/common/board.c
+++ b/board/nvidia/common/board.c
@@ -41,7 +41,16 @@  const struct tegra2_sysinfo sysinfo = {
 #ifdef CONFIG_BOARD_EARLY_INIT_F
 int board_early_init_f(void)
 {
-	debug("Board Early Init\n");
+	/* Initialize periph clocks */
+	clock_init();
+
+	/* Initialize periph pinmuxes */
+	pinmux_init();
+
+	/* Initialize periph GPIOs */
+	gpio_init();
+
+	/* Init UART, scratch regs, and start CPU */
 	tegra2_start();
 	return 0;
 }
@@ -64,10 +73,10 @@  int timer_init(void)
 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) {
+	reg = readl(&clkrst->crc_pllp_base);
+	if (!(reg & PLL_BASE_OVRRIDE)) {
 		/* Override pllp setup for 216MHz operation. */
 		reg = (PLL_BYPASS | PLL_BASE_OVRRIDE | PLL_DIVP);
 		reg |= (((NVRM_PLLP_FIXED_FREQ_KHZ/500) << 8) | PLL_DIVM);
@@ -78,8 +87,6 @@  static void clock_init_uart(void)
 
 		reg &= ~PLL_BYPASS;
 		writel(reg, &clkrst->crc_pllp_base);
-
-		pllp_init_done++;
 	}
 
 	/* Now do the UART reset/clock enable */
@@ -182,6 +189,15 @@  void pinmux_init(void)
 }
 
 /*
+ * Routine: gpio_init
+ * Description: Do individual peripheral GPIO configs
+ */
+void gpio_init(void)
+{
+	gpio_config_uart();
+}
+
+/*
  * Routine: board_init
  * Description: Early hardware init.
  */
@@ -192,11 +208,5 @@  int board_init(void)
 	/* board id for Linux */
 	gd->bd->bi_arch_number = CONFIG_MACH_TYPE;
 
-	/* Initialize peripheral clocks */
-	clock_init();
-
-	/* Initialize periph pinmuxes */
-	pinmux_init();
-
 	return 0;
 }
diff --git a/board/nvidia/common/board.h b/board/nvidia/common/board.h
index 47c7885..350bc57 100644
--- a/board/nvidia/common/board.h
+++ b/board/nvidia/common/board.h
@@ -25,5 +25,9 @@ 
 #define _BOARD_H_
 
 void tegra2_start(void);
+void clock_init(void);
+void pinmux_init(void);
+void gpio_init(void);
+void gpio_config_uart(void);
 
 #endif	/* BOARD_H */
diff --git a/board/nvidia/harmony/Makefile b/board/nvidia/harmony/Makefile
index 3a146cb..9fb6b57 100644
--- a/board/nvidia/harmony/Makefile
+++ b/board/nvidia/harmony/Makefile
@@ -26,6 +26,7 @@  include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).o
 
+COBJS	:= $(BOARD).o
 COBJS	+= ../common/board.o
 
 SRCS	:= $(COBJS:.o=.c)
diff --git a/board/nvidia/harmony/harmony.c b/board/nvidia/harmony/harmony.c
new file mode 100644
index 0000000..f1ab050
--- /dev/null
+++ b/board/nvidia/harmony/harmony.c
@@ -0,0 +1,34 @@ 
+/*
+ *  (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 <asm/io.h>
+#include <asm/arch/tegra2.h>
+
+/*
+ * Routine: gpio_config_uart
+ * Description: Does nothing on Harmony - no conflict w/SPI.
+ */
+void gpio_config_uart(void)
+{
+}
diff --git a/board/nvidia/seaboard/Makefile b/board/nvidia/seaboard/Makefile
index 3a146cb..9fb6b57 100644
--- a/board/nvidia/seaboard/Makefile
+++ b/board/nvidia/seaboard/Makefile
@@ -26,6 +26,7 @@  include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).o
 
+COBJS	:= $(BOARD).o
 COBJS	+= ../common/board.o
 
 SRCS	:= $(COBJS:.o=.c)
diff --git a/board/nvidia/seaboard/seaboard.c b/board/nvidia/seaboard/seaboard.c
new file mode 100644
index 0000000..4b9a8f3
--- /dev/null
+++ b/board/nvidia/seaboard/seaboard.c
@@ -0,0 +1,52 @@ 
+/*
+ *  (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 <asm/io.h>
+#include <asm/arch/tegra2.h>
+#include <asm/arch/gpio.h>
+
+/*
+ * Routine: gpio_config_uart
+ * Description: Force GPIO_PI3 low on Seaboard so UART4 works.
+ */
+void gpio_config_uart(void)
+{
+	int gp = GPIO_PI3;
+	struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
+	struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
+	u32 val;
+
+	/* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
+	val = readl(&bank->gpio_config[GPIO_PORT(gp)]);
+	val |= 1 << GPIO_BIT(gp);
+	writel(val, &bank->gpio_config[GPIO_PORT(gp)]);
+
+	val = readl(&bank->gpio_out[GPIO_PORT(gp)]);
+	val &= ~(1 << GPIO_BIT(gp));
+	writel(val, &bank->gpio_out[GPIO_PORT(gp)]);
+
+	val = readl(&bank->gpio_dir_out[GPIO_PORT(gp)]);
+	val |= 1 << GPIO_BIT(gp);
+	writel(val, &bank->gpio_dir_out[GPIO_PORT(gp)]);
+}