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-rw-r--r--arch/arm/cpu/arm926ejs/nomadik/Makefile46
-rw-r--r--arch/arm/cpu/arm926ejs/nomadik/gpio.c99
-rw-r--r--arch/arm/cpu/arm926ejs/nomadik/reset.S14
-rw-r--r--arch/arm/cpu/arm926ejs/nomadik/timer.c79
4 files changed, 238 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm926ejs/nomadik/Makefile b/arch/arm/cpu/arm926ejs/nomadik/Makefile
new file mode 100644
index 0000000000..0fc9f2a4c1
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/nomadik/Makefile
@@ -0,0 +1,46 @@
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# 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 $(TOPDIR)/config.mk
+
+LIB = $(obj)lib$(SOC).a
+
+COBJS = timer.o gpio.o
+SOBJS = reset.o
+
+SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(COBJS)) $(addprefix $(obj),$(SOBJS))
+
+all: $(obj).depend $(LIB)
+
+$(LIB): $(OBJS)
+ $(AR) $(ARFLAGS) $@ $(OBJS)
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/arm/cpu/arm926ejs/nomadik/gpio.c b/arch/arm/cpu/arm926ejs/nomadik/gpio.c
new file mode 100644
index 0000000000..62a375b5b5
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/nomadik/gpio.c
@@ -0,0 +1,99 @@
+/*
+ * (C) Copyright 2009 Alessandro Rubini
+ *
+ * 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/gpio.h>
+
+static unsigned long gpio_base[4] = {
+ NOMADIK_GPIO0_BASE,
+ NOMADIK_GPIO1_BASE,
+ NOMADIK_GPIO2_BASE,
+ NOMADIK_GPIO3_BASE
+};
+
+enum gpio_registers {
+ GPIO_DAT = 0x00, /* data register */
+ GPIO_DATS = 0x04, /* data set */
+ GPIO_DATC = 0x08, /* data clear */
+ GPIO_PDIS = 0x0c, /* pull disable */
+ GPIO_DIR = 0x10, /* direction */
+ GPIO_DIRS = 0x14, /* direction set */
+ GPIO_DIRC = 0x18, /* direction clear */
+ GPIO_AFSLA = 0x20, /* alternate function select A */
+ GPIO_AFSLB = 0x24, /* alternate function select B */
+};
+
+static inline unsigned long gpio_to_base(int gpio)
+{
+ return gpio_base[gpio / 32];
+}
+
+static inline u32 gpio_to_bit(int gpio)
+{
+ return 1 << (gpio & 0x1f);
+}
+
+void nmk_gpio_af(int gpio, int alternate_function)
+{
+ unsigned long base = gpio_to_base(gpio);
+ u32 bit = gpio_to_bit(gpio);
+ u32 afunc, bfunc;
+
+ /* alternate function is 0..3, with one bit per register */
+ afunc = readl(base + GPIO_AFSLA) & ~bit;
+ bfunc = readl(base + GPIO_AFSLB) & ~bit;
+ if (alternate_function & 1) afunc |= bit;
+ if (alternate_function & 2) bfunc |= bit;
+ writel(afunc, base + GPIO_AFSLA);
+ writel(bfunc, base + GPIO_AFSLB);
+}
+
+void nmk_gpio_dir(int gpio, int dir)
+{
+ unsigned long base = gpio_to_base(gpio);
+ u32 bit = gpio_to_bit(gpio);
+
+ if (dir)
+ writel(bit, base + GPIO_DIRS);
+ else
+ writel(bit, base + GPIO_DIRC);
+}
+
+void nmk_gpio_set(int gpio, int val)
+{
+ unsigned long base = gpio_to_base(gpio);
+ u32 bit = gpio_to_bit(gpio);
+
+ if (val)
+ writel(bit, base + GPIO_DATS);
+ else
+ writel(bit, base + GPIO_DATC);
+}
+
+int nmk_gpio_get(int gpio)
+{
+ unsigned long base = gpio_to_base(gpio);
+ u32 bit = gpio_to_bit(gpio);
+
+ return readl(base + GPIO_DAT) & bit;
+}
diff --git a/arch/arm/cpu/arm926ejs/nomadik/reset.S b/arch/arm/cpu/arm926ejs/nomadik/reset.S
new file mode 100644
index 0000000000..ec954726ae
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/nomadik/reset.S
@@ -0,0 +1,14 @@
+#include <config.h>
+/*
+ * Processor reset for Nomadik
+ */
+
+ .align 5
+.globl reset_cpu
+reset_cpu:
+ ldr r0, =NOMADIK_SRC_BASE /* System and Reset Controller */
+ ldr r1, =0x1
+ str r1, [r0, #0x18]
+
+_loop_forever:
+ b _loop_forever
diff --git a/arch/arm/cpu/arm926ejs/nomadik/timer.c b/arch/arm/cpu/arm926ejs/nomadik/timer.c
new file mode 100644
index 0000000000..1d98ef3eb3
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/nomadik/timer.c
@@ -0,0 +1,79 @@
+/*
+ * (C) Copyright 2009 Alessandro Rubini
+ *
+ * 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/mtu.h>
+
+/*
+ * The timer is a decrementer, we'll left it free running at 2.4MHz.
+ * We have 2.4 ticks per microsecond and an overflow in almost 30min
+ */
+#define TIMER_CLOCK (24 * 100 * 1000)
+#define COUNT_TO_USEC(x) ((x) * 5 / 12) /* overflows at 6min */
+#define USEC_TO_COUNT(x) ((x) * 12 / 5) /* overflows at 6min */
+#define TICKS_PER_HZ (TIMER_CLOCK / CONFIG_SYS_HZ)
+#define TICKS_TO_HZ(x) ((x) / TICKS_PER_HZ)
+
+/* macro to read the decrementing 32 bit timer as an increasing count */
+#define READ_TIMER() (0 - readl(CONFIG_SYS_TIMERBASE + MTU_VAL(0)))
+
+/* Configure a free-running, auto-wrap counter with no prescaler */
+int timer_init(void)
+{
+ writel(MTU_CRn_ENA | MTU_CRn_PRESCALE_1 | MTU_CRn_32BITS,
+ CONFIG_SYS_TIMERBASE + MTU_CR(0));
+ reset_timer();
+ return 0;
+}
+
+/* Restart counting from 0 */
+void reset_timer(void)
+{
+ ulong val;
+ writel(0, CONFIG_SYS_TIMERBASE + MTU_LR(0));
+ /*
+ * The load-register isn't really immediate: it changes on clock
+ * edges, so we must wait for our newly-written value to appear.
+ * Since we might miss reading 0, wait for any change in value.
+ */
+ val = READ_TIMER();
+ while (READ_TIMER() == val)
+ ;
+}
+
+/* Return how many HZ passed since "base" */
+ulong get_timer(ulong base)
+{
+ return TICKS_TO_HZ(READ_TIMER()) - base;
+}
+
+/* Delay x useconds */
+void __udelay(unsigned long usec)
+{
+ ulong ini, end;
+
+ ini = READ_TIMER();
+ end = ini + USEC_TO_COUNT(usec);
+ while ((signed)(end - READ_TIMER()) > 0)
+ ;
+}
generated by cgit (git 2.34.1) at 2025-01-01 04:17:52 +0000