From: Krzysztof Halasa <khc@pm.waw.pl>
To: barebox@lists.infradead.org
Subject: [PATCH] ARM: Support for IXP4xx CPU.
Date: Sun, 07 Apr 2013 21:54:24 +0200 [thread overview]
Message-ID: <m3obdq15hr.fsf_-_@intrepid.localdomain> (raw)
In-Reply-To: <m3bo9q36ua.fsf@intrepid.localdomain> (Krzysztof Halasa's message of "Sun, 07 Apr 2013 13:42:21 +0200")
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index bb9b47b..2a775d5 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -79,6 +79,12 @@ config ARCH_IMX
select WATCHDOG_IMX_RESET_SOURCE
select HAS_DEBUG_LL
+config ARCH_IXP4XX
+ bool "Intel IXP4xx-based"
+ select CPU_XSCALE
+ select ARCH_SUPPORTS_BIG_ENDIAN
+ select CPU_BIG_ENDIAN
+
config ARCH_MXS
bool "Freescale i.MX23/28 (mxs) based"
select GENERIC_GPIO
@@ -153,6 +159,7 @@ source arch/arm/mach-clps711x/Kconfig
source arch/arm/mach-ep93xx/Kconfig
source arch/arm/mach-highbank/Kconfig
source arch/arm/mach-imx/Kconfig
+source arch/arm/mach-ixp4xx/Kconfig
source arch/arm/mach-mxs/Kconfig
source arch/arm/mach-netx/Kconfig
source arch/arm/mach-nomadik/Kconfig
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index d506b12..584d39b 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -57,6 +57,7 @@ machine-$(CONFIG_ARCH_CLPS711X) := clps711x
machine-$(CONFIG_ARCH_EP93XX) := ep93xx
machine-$(CONFIG_ARCH_HIGHBANK) := highbank
machine-$(CONFIG_ARCH_IMX) := imx
+machine-$(CONFIG_ARCH_IXP4XX) := ixp4xx
machine-$(CONFIG_ARCH_MXS) := mxs
machine-$(CONFIG_ARCH_NOMADIK) := nomadik
machine-$(CONFIG_ARCH_NETX) := netx
diff --git a/arch/arm/mach-ixp4xx/Kconfig b/arch/arm/mach-ixp4xx/Kconfig
new file mode 100644
index 0000000..e69de29
diff --git a/arch/arm/mach-ixp4xx/Makefile b/arch/arm/mach-ixp4xx/Makefile
new file mode 100644
index 0000000..d8a3d7f
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/Makefile
@@ -0,0 +1 @@
+obj-y += generic.o
diff --git a/arch/arm/mach-ixp4xx/generic.c b/arch/arm/mach-ixp4xx/generic.c
new file mode 100644
index 0000000..e81994b
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/generic.c
@@ -0,0 +1,114 @@
+#include <common.h>
+#include <init.h>
+#include <ns16550.h>
+#include <asm/armlinux.h>
+#include <asm/io.h>
+#include <mach/ixp4xx-regs.h>
+
+#define OSTS_FREQUENCY 66666000
+
+void reset_cpu(ulong addr)
+{
+ /* Use on-chip reset capability */
+ /* This may not work on IXP425 rev. A0 */
+
+ IXP4XX_OSWK = IXP4XX_WDT_KEY;
+ IXP4XX_OSWT = 0; /* request immediate reset */
+ IXP4XX_OSWE = IXP4XX_WDT_RESET_ENABLE | IXP4XX_WDT_COUNT_ENABLE;
+ while (1)
+ ;
+}
+
+#include <clock.h>
+
+/**
+ * @brief Provide a simple clock read
+ *
+ * Nothing is simpler.. read direct from clock and provide it
+ * to the caller.
+ *
+ * @return clock counter
+ */
+static uint64_t ixp4xx_clocksource_read(void)
+{
+ return IXP4XX_OSTS;
+}
+
+static struct clocksource cs = {
+ .read = ixp4xx_clocksource_read,
+ .mask = 0xffffffff,
+ .shift = 10,
+};
+
+/**
+ * @brief Initialize the Clock
+ *
+ * We use the Time-Stamp Timer
+ *
+ * @return result of @ref init_clock
+ */
+static int ixp4xx_clocksource_init(void)
+{
+ cs.mult = clocksource_hz2mult(OSTS_FREQUENCY, cs.shift);
+
+ return init_clock(&cs);
+}
+
+/* Run me at boot time */
+core_initcall(ixp4xx_clocksource_init);
+
+
+#ifdef CONFIG_DRIVER_SERIAL_NS16550
+
+/**
+ * @brief UART port register read function for IXP4XX
+ *
+ * @param base base address of UART
+ * @param reg_idx register index
+ *
+ * @return character read from register
+ */
+unsigned int ixp4xx_uart_read(unsigned long base, unsigned char reg_idx)
+{
+ return readb(4 * reg_idx + 3 /* big-endian */ + (uint8_t *)base);
+}
+EXPORT_SYMBOL(ixp4xx_uart_read);
+
+/**
+ * @brief UART port register write function for IXP4XX
+ *
+ * @param val value to write
+ * @param base base address of UART
+ * @param reg_idx register index
+ *
+ * @return void
+ */
+void ixp4xx_uart_write(unsigned int val, unsigned long base, unsigned char reg_idx)
+{
+ writeb(val, 4 * reg_idx + 3 /* big-endian */ + (uint8_t *)base);
+}
+EXPORT_SYMBOL(ixp4xx_uart_write);
+
+
+static struct NS16550_plat serial_plat = {
+ .clock = 14745600,
+ .f_caps = CONSOLE_STDIN | CONSOLE_STDOUT | CONSOLE_STDERR,
+ .reg_read = ixp4xx_uart_read,
+ .reg_write = ixp4xx_uart_write,
+};
+
+/**
+ * @brief UART serial port initialization
+ *
+ * @return result of device registration
+ */
+static int ixp4xx_console_init(void)
+{
+ /* Register the serial port */
+ add_ns16550_device(0, (u32)IXP4XX_UART1_BASE, 1024, IORESOURCE_MEM_8BIT, &serial_plat);
+ return 0;
+}
+
+console_initcall(ixp4xx_console_init);
+
+#endif /* CONFIG_DRIVER_SERIAL_NS16550 */
diff --git a/arch/arm/mach-ixp4xx/include/mach/cpu.h b/arch/arm/mach-ixp4xx/include/mach/cpu.h
new file mode 100644
index 0000000..1aef932
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/include/mach/cpu.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2007, 2009 Krzysztof Halasa
+ * Copyright (C) 2007 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef __MACH_CPU_H__
+#define __MACH_CPU_H__
+
+#include <linux/types.h>
+#include <asm/cputype.h>
+
+/* Processor id value in CP15 Register 0 */
+#define IXP42X_PROCESSOR_ID_VALUE 0x690541c0 /* including unused 0x690541Ex */
+#define IXP42X_PROCESSOR_ID_MASK 0xffffffc0
+
+#define IXP43X_PROCESSOR_ID_VALUE 0x69054040
+#define IXP43X_PROCESSOR_ID_MASK 0xfffffff0
+
+#define IXP46X_PROCESSOR_ID_VALUE 0x69054200 /* including IXP455 */
+#define IXP46X_PROCESSOR_ID_MASK 0xfffffff0
+
+#define cpu_is_ixp42x_rev_a0() ((read_cpuid_id() & (IXP42X_PROCESSOR_ID_MASK | 0xF)) == \
+ IXP42X_PROCESSOR_ID_VALUE)
+#define cpu_is_ixp42x() ((read_cpuid_id() & IXP42X_PROCESSOR_ID_MASK) == \
+ IXP42X_PROCESSOR_ID_VALUE)
+#define cpu_is_ixp43x() ((read_cpuid_id() & IXP43X_PROCESSOR_ID_MASK) == \
+ IXP43X_PROCESSOR_ID_VALUE)
+#define cpu_is_ixp46x() ((read_cpuid_id() & IXP46X_PROCESSOR_ID_MASK) == \
+ IXP46X_PROCESSOR_ID_VALUE)
+
+static inline u32 ixp4xx_read_feature_bits(void)
+{
+ u32 val = ~IXP4XX_EXP_CFG2;
+
+ if (cpu_is_ixp42x_rev_a0())
+ return IXP42X_FEATURE_MASK & ~(IXP4XX_FEATURE_RCOMP |
+ IXP4XX_FEATURE_AES);
+ if (cpu_is_ixp42x())
+ return val & IXP42X_FEATURE_MASK;
+ if (cpu_is_ixp43x())
+ return val & IXP43X_FEATURE_MASK;
+ return val & IXP46X_FEATURE_MASK;
+}
+
+static inline void ixp4xx_write_feature_bits(u32 value)
+{
+ IXP4XX_EXP_CFG2 = ~value;
+}
+
+#endif /* _MACH_CPU_H */
diff --git a/arch/arm/mach-ixp4xx/include/mach/ixp4xx-head.h b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-head.h
new file mode 100644
index 0000000..b3d357f
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-head.h
@@ -0,0 +1,16 @@
+#include <mach/ixp4xx-regs.h>
+#include <asm/barebox-arm-head.h>
+
+.macro ixp4xx_cpu_lowlevel_init
+
+ arm_cpu_lowlevel_init r0
+
+ add pc, #(0x50000000 - 4) /* jump to ROM area */
+
+ mov r0, #(IXP4XX_EXP_CFG0 & 0xFFFF0000)
+ orr r0, #(IXP4XX_EXP_CFG0 & 0x0000FFFF)
+ ldr r1, [r0]
+ and r1, r1, #~0x80000000 /* unmap EXP bus from 0x0 */
+ str r1, [r0]
+
+.endm
diff --git a/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
new file mode 100644
index 0000000..da4dc8a
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/include/mach/ixp4xx-regs.h
@@ -0,0 +1,365 @@
+/*
+ * Register definitions for IXP4xx chipset.
+ *
+ * Copyright (C) 2002 Intel Corporation.
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef _ASM_ARM_IXP4XX_H_
+#define _ASM_ARM_IXP4XX_H_
+
+#ifdef __ASSEMBLER__
+#define IXP4XX_REG(reg) (reg)
+#else
+#define IXP4XX_REG(reg) (*(volatile u32 *)(reg))
+#define IXP4XX_BASE(reg) ((u32*)(reg))
+#endif
+
+/* Expansion Bus region */
+
+/* Queue Manager */
+#define IXP4XX_QMGR_BASE (0x60000000)
+#define IXP4XX_QMGR_REGION_SIZE (0x00004000)
+
+
+/* PCI Config registers */
+#define IXP4XX_PCI_CFG_BASE (0xC0000000)
+#define IXP4XX_PCI_CFG_REGION_SIZE (0x00001000)
+
+/* Peripheral space */
+#define IXP4XX_PERIPHERAL_BASE (0xC8000000)
+#define IXP4XX_PERIPHERAL_REGION_SIZE (0x00013000)
+
+/*
+ * Debug UART
+ *
+ * This is basically a remap of UART1 into a region that is section
+ * aligned so that it can be used with the low-level debug code.
+ */
+#define IXP4XX_DEBUG_UART_BASE (0xC8000000)
+#define IXP4XX_DEBUG_UART_REGION_SIZE (0x00001000)
+
+/* Expansion Bus Controller registers. */
+#define IXP4XX_EXP_CS0 IXP4XX_REG(0xC4000000)
+#define IXP4XX_EXP_CS1 IXP4XX_REG(0xC4000004)
+#define IXP4XX_EXP_CS2 IXP4XX_REG(0xC4000008)
+#define IXP4XX_EXP_CS3 IXP4XX_REG(0xC400000C)
+#define IXP4XX_EXP_CS4 IXP4XX_REG(0xC4000010)
+#define IXP4XX_EXP_CS5 IXP4XX_REG(0xC4000014)
+#define IXP4XX_EXP_CS6 IXP4XX_REG(0xC4000018)
+#define IXP4XX_EXP_CS7 IXP4XX_REG(0xC400001C)
+
+#define IXP4XX_EXP_BASE(n) (0x50000000 + (n) * 1000000)
+
+#define IXP4XX_EXP_EN 0x80000000
+#define IXP4XX_EXP_T1(n) (0x10000000 * (n)) /* valid: 0 - 3 */
+#define IXP4XX_EXP_T2(n) (0x04000000 * (n)) /* valid: 0 - 3 */
+#define IXP4XX_EXP_T3(n) (0x00400000 * (n)) /* valid: 0 - 15 */
+#define IXP4XX_EXP_T4(n) (0x00100000 * (n)) /* valid: 0 - 3 */
+#define IXP4XX_EXP_T5(n) (0x00010000 * (n)) /* valid: 0 - 15 */
+#define IXP4XX_EXP_INTEL 0x00000000
+#define IXP4XX_EXP_MOTO 0x00004000
+#define IXP4XX_EXP_HPI 0x00008000
+#define IXP4XX_EXP_BITS(n) (0x00000400 * ((n) - 9)) /* valid: 9 - 24 */
+#define IXP4XX_EXP_BYTE_RD16 0x00000040
+#define IXP4XX_EXP_HRDY_POL 0x00000020
+#define IXP4XX_EXP_MUX_EN 0x00000010
+#define IXP4XX_EXP_SPLT_EN 0x00000008
+#define IXP4XX_EXP_WR_EN 0x00000002
+#define IXP4XX_EXP_BYTE_EN 0x00000001
+
+#define IXP4XX_EXP_CFG0 IXP4XX_REG(0xC4000020)
+#define IXP4XX_EXP_CFG1 IXP4XX_REG(0xC4000024)
+#define IXP4XX_EXP_CFG2 IXP4XX_REG(0xC4000028)
+#define IXP4XX_EXP_CFG3 IXP4XX_REG(0xC400002C)
+
+
+/* Peripheral Space Register Region Base Addresses */
+#define IXP4XX_UART1_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x0000)
+#define IXP4XX_UART2_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x1000)
+#define IXP4XX_PMU_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x2000)
+#define IXP4XX_INTC_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x3000)
+#define IXP4XX_GPIO_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x4000)
+#define IXP4XX_NPEA_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x6000)
+#define IXP4XX_NPEB_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x7000)
+#define IXP4XX_NPEC_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x8000)
+#define IXP4XX_EthB_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x9000)
+#define IXP4XX_EthC_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0xA000)
+#define IXP4XX_USB_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0xB000)
+/* IXP46x only */
+#define IXP4XX_EthA_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0xC000)
+#define IXP4XX_EthB1_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0xD000)
+#define IXP4XX_EthB2_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0xE000)
+#define IXP4XX_EthB3_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0xF000)
+#define IXP4XX_TIMESYNC_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x10000)
+#define IXP4XX_I2C_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x11000)
+#define IXP4XX_SSP_BASE IXP4XX_BASE(IXP4XX_PERIPHERAL_BASE + 0x12000)
+
+/*
+ Constants to make it easy to access Interrupt Controller registers
+ */
+#define IXP4XX_ICPR_OFFSET 0x00 /* Interrupt Status */
+#define IXP4XX_ICMR_OFFSET 0x04 /* Interrupt Enable */
+#define IXP4XX_ICLR_OFFSET 0x08 /* Interrupt IRQ/FIQ Select */
+#define IXP4XX_ICIP_OFFSET 0x0C /* IRQ Status */
+#define IXP4XX_ICFP_OFFSET 0x10 /* FIQ Status */
+#define IXP4XX_ICHR_OFFSET 0x14 /* Interrupt Priority */
+#define IXP4XX_ICIH_OFFSET 0x18 /* IRQ Highest Pri Int */
+#define IXP4XX_ICFH_OFFSET 0x1C /* FIQ Highest Pri Int */
+
+/* IXP465-only */
+#define IXP4XX_ICPR2_OFFSET 0x20 /* Interrupt Status 2 */
+#define IXP4XX_ICMR2_OFFSET 0x24 /* Interrupt Enable 2 */
+#define IXP4XX_ICLR2_OFFSET 0x28 /* Interrupt IRQ/FIQ Select 2 */
+#define IXP4XX_ICIP2_OFFSET 0x2C /* IRQ Status */
+#define IXP4XX_ICFP2_OFFSET 0x30 /* FIQ Status */
+#define IXP4XX_ICEEN_OFFSET 0x34 /* Error High Pri Enable */
+
+
+/* Interrupt Controller Register Definitions. */
+#define IXP4XX_INTC_REG(x) ((volatile u32 *)(IXP4XX_INTC_BASE + (x)))
+
+#define IXP4XX_ICPR IXP4XX_INTC_REG(IXP4XX_ICPR_OFFSET)
+#define IXP4XX_ICMR IXP4XX_INTC_REG(IXP4XX_ICMR_OFFSET)
+#define IXP4XX_ICLR IXP4XX_INTC_REG(IXP4XX_ICLR_OFFSET)
+#define IXP4XX_ICIP IXP4XX_INTC_REG(IXP4XX_ICIP_OFFSET)
+#define IXP4XX_ICFP IXP4XX_INTC_REG(IXP4XX_ICFP_OFFSET)
+#define IXP4XX_ICHR IXP4XX_INTC_REG(IXP4XX_ICHR_OFFSET)
+#define IXP4XX_ICIH IXP4XX_INTC_REG(IXP4XX_ICIH_OFFSET)
+#define IXP4XX_ICFH IXP4XX_INTC_REG(IXP4XX_ICFH_OFFSET)
+#define IXP4XX_ICPR2 IXP4XX_INTC_REG(IXP4XX_ICPR2_OFFSET)
+#define IXP4XX_ICMR2 IXP4XX_INTC_REG(IXP4XX_ICMR2_OFFSET)
+#define IXP4XX_ICLR2 IXP4XX_INTC_REG(IXP4XX_ICLR2_OFFSET)
+#define IXP4XX_ICIP2 IXP4XX_INTC_REG(IXP4XX_ICIP2_OFFSET)
+#define IXP4XX_ICFP2 IXP4XX_INTC_REG(IXP4XX_ICFP2_OFFSET)
+#define IXP4XX_ICEEN IXP4XX_INTC_REG(IXP4XX_ICEEN_OFFSET)
+
+/* Constants to make it easy to access GPIO registers */
+#define IXP4XX_GPIO_GPOUTR_OFFSET 0x00
+#define IXP4XX_GPIO_GPOER_OFFSET 0x04
+#define IXP4XX_GPIO_GPINR_OFFSET 0x08
+#define IXP4XX_GPIO_GPISR_OFFSET 0x0C
+#define IXP4XX_GPIO_GPIT1R_OFFSET 0x10
+#define IXP4XX_GPIO_GPIT2R_OFFSET 0x14
+#define IXP4XX_GPIO_GPCLKR_OFFSET 0x18
+#define IXP4XX_GPIO_GPDBSELR_OFFSET 0x1C
+
+/* GPIO Register Definitions - perform only 32-bit reads/writes */
+#define IXP4XX_GPIO_REG(x) ((volatile u32 *)(IXP4XX_GPIO_BASE + (x)))
+
+#define IXP4XX_GPIO_GPOUTR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPOUTR_OFFSET)
+#define IXP4XX_GPIO_GPOER IXP4XX_GPIO_REG(IXP4XX_GPIO_GPOER_OFFSET)
+#define IXP4XX_GPIO_GPINR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPINR_OFFSET)
+#define IXP4XX_GPIO_GPISR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPISR_OFFSET)
+#define IXP4XX_GPIO_GPIT1R IXP4XX_GPIO_REG(IXP4XX_GPIO_GPIT1R_OFFSET)
+#define IXP4XX_GPIO_GPIT2R IXP4XX_GPIO_REG(IXP4XX_GPIO_GPIT2R_OFFSET)
+#define IXP4XX_GPIO_GPCLKR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPCLKR_OFFSET)
+#define IXP4XX_GPIO_GPDBSELR IXP4XX_GPIO_REG(IXP4XX_GPIO_GPDBSELR_OFFSET)
+
+/* GPIO register bit definitions */
+
+/* Interrupt styles */
+#define IXP4XX_GPIO_STYLE_ACTIVE_HIGH 0x0
+#define IXP4XX_GPIO_STYLE_ACTIVE_LOW 0x1
+#define IXP4XX_GPIO_STYLE_RISING_EDGE 0x2
+#define IXP4XX_GPIO_STYLE_FALLING_EDGE 0x3
+#define IXP4XX_GPIO_STYLE_TRANSITIONAL 0x4
+
+/* Mask used to clear interrupt styles */
+#define IXP4XX_GPIO_STYLE_CLEAR 0x7
+#define IXP4XX_GPIO_STYLE_SIZE 3
+
+/* Operating System Timer Register Definitions. */
+#define IXP4XX_OSTS IXP4XX_REG(0xC8005000) /* Continious TimeStamp */
+#define IXP4XX_OST1 IXP4XX_REG(0xC8005004) /* Timer 1 Timestamp */
+#define IXP4XX_OSRT1 IXP4XX_REG(0xC8005008) /* Timer 1 Reload */
+#define IXP4XX_OST2 IXP4XX_REG(0xC800500C) /* Timer 2 Timestamp */
+#define IXP4XX_OSRT2 IXP4XX_REG(0xC8005010) /* Timer 2 Reload */
+#define IXP4XX_OSWT IXP4XX_REG(0xC8005014) /* Watchdog Timer */
+#define IXP4XX_OSWE IXP4XX_REG(0xC8005018) /* Watchdog Enable */
+#define IXP4XX_OSWK IXP4XX_REG(0xC800501C) /* Watchdog Key */
+#define IXP4XX_OSST IXP4XX_REG(0xC8005020) /* Timer Status */
+
+/* Timer register values and bit definitions */
+#define IXP4XX_OST_ENABLE 0x00000001
+#define IXP4XX_OST_ONE_SHOT 0x00000002
+/* Low order bits of reload value ignored */
+#define IXP4XX_OST_RELOAD_MASK 0x00000003
+#define IXP4XX_OST_DISABLED 0x00000000
+#define IXP4XX_OSST_TIMER_1_PEND 0x00000001
+#define IXP4XX_OSST_TIMER_2_PEND 0x00000002
+#define IXP4XX_OSST_TIMER_TS_PEND 0x00000004
+#define IXP4XX_OSST_TIMER_WDOG_PEND 0x00000008
+#define IXP4XX_OSST_TIMER_WARM_RESET 0x00000010
+
+#define IXP4XX_WDT_KEY 0x0000482E
+
+#define IXP4XX_WDT_RESET_ENABLE 0x00000001
+#define IXP4XX_WDT_IRQ_ENABLE 0x00000002
+#define IXP4XX_WDT_COUNT_ENABLE 0x00000004
+
+
+/* Constants to make it easy to access PCI Control/Status registers */
+#define PCI_NP_AD_OFFSET 0x00
+#define PCI_NP_CBE_OFFSET 0x04
+#define PCI_NP_WDATA_OFFSET 0x08
+#define PCI_NP_RDATA_OFFSET 0x0c
+#define PCI_CRP_AD_CBE_OFFSET 0x10
+#define PCI_CRP_WDATA_OFFSET 0x14
+#define PCI_CRP_RDATA_OFFSET 0x18
+#define PCI_CSR_OFFSET 0x1c
+#define PCI_ISR_OFFSET 0x20
+#define PCI_INTEN_OFFSET 0x24
+#define PCI_DMACTRL_OFFSET 0x28
+#define PCI_AHBMEMBASE_OFFSET 0x2c
+#define PCI_AHBIOBASE_OFFSET 0x30
+#define PCI_PCIMEMBASE_OFFSET 0x34
+#define PCI_AHBDOORBELL_OFFSET 0x38
+#define PCI_PCIDOORBELL_OFFSET 0x3C
+#define PCI_ATPDMA0_AHBADDR_OFFSET 0x40
+#define PCI_ATPDMA0_PCIADDR_OFFSET 0x44
+#define PCI_ATPDMA0_LENADDR_OFFSET 0x48
+#define PCI_ATPDMA1_AHBADDR_OFFSET 0x4C
+#define PCI_ATPDMA1_PCIADDR_OFFSET 0x50
+#define PCI_ATPDMA1_LENADDR_OFFSET 0x54
+
+/* PCI Control/Status Registers */
+#define IXP4XX_PCI_CSR(x) ((volatile u32 *)(IXP4XX_PCI_CFG_BASE + (x)))
+
+#define PCI_NP_AD IXP4XX_PCI_CSR(PCI_NP_AD_OFFSET)
+#define PCI_NP_CBE IXP4XX_PCI_CSR(PCI_NP_CBE_OFFSET)
+#define PCI_NP_WDATA IXP4XX_PCI_CSR(PCI_NP_WDATA_OFFSET)
+#define PCI_NP_RDATA IXP4XX_PCI_CSR(PCI_NP_RDATA_OFFSET)
+#define PCI_CRP_AD_CBE IXP4XX_PCI_CSR(PCI_CRP_AD_CBE_OFFSET)
+#define PCI_CRP_WDATA IXP4XX_PCI_CSR(PCI_CRP_WDATA_OFFSET)
+#define PCI_CRP_RDATA IXP4XX_PCI_CSR(PCI_CRP_RDATA_OFFSET)
+#define PCI_CSR IXP4XX_PCI_CSR(PCI_CSR_OFFSET)
+#define PCI_ISR IXP4XX_PCI_CSR(PCI_ISR_OFFSET)
+#define PCI_INTEN IXP4XX_PCI_CSR(PCI_INTEN_OFFSET)
+#define PCI_DMACTRL IXP4XX_PCI_CSR(PCI_DMACTRL_OFFSET)
+#define PCI_AHBMEMBASE IXP4XX_PCI_CSR(PCI_AHBMEMBASE_OFFSET)
+#define PCI_AHBIOBASE IXP4XX_PCI_CSR(PCI_AHBIOBASE_OFFSET)
+#define PCI_PCIMEMBASE IXP4XX_PCI_CSR(PCI_PCIMEMBASE_OFFSET)
+#define PCI_AHBDOORBELL IXP4XX_PCI_CSR(PCI_AHBDOORBELL_OFFSET)
+#define PCI_PCIDOORBELL IXP4XX_PCI_CSR(PCI_PCIDOORBELL_OFFSET)
+#define PCI_ATPDMA0_AHBADDR IXP4XX_PCI_CSR(PCI_ATPDMA0_AHBADDR_OFFSET)
+#define PCI_ATPDMA0_PCIADDR IXP4XX_PCI_CSR(PCI_ATPDMA0_PCIADDR_OFFSET)
+#define PCI_ATPDMA0_LENADDR IXP4XX_PCI_CSR(PCI_ATPDMA0_LENADDR_OFFSET)
+#define PCI_ATPDMA1_AHBADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_AHBADDR_OFFSET)
+#define PCI_ATPDMA1_PCIADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_PCIADDR_OFFSET)
+#define PCI_ATPDMA1_LENADDR IXP4XX_PCI_CSR(PCI_ATPDMA1_LENADDR_OFFSET)
+
+/* PCI register values and bit definitions */
+
+/* CSR bit definitions */
+#define PCI_CSR_HOST 0x00000001
+#define PCI_CSR_ARBEN 0x00000002
+#define PCI_CSR_ADS 0x00000004
+#define PCI_CSR_PDS 0x00000008
+#define PCI_CSR_ABE 0x00000010
+#define PCI_CSR_DBT 0x00000020
+#define PCI_CSR_ASE 0x00000100
+#define PCI_CSR_IC 0x00008000
+
+/* ISR (Interrupt status) Register bit definitions */
+#define PCI_ISR_PSE 0x00000001
+#define PCI_ISR_PFE 0x00000002
+#define PCI_ISR_PPE 0x00000004
+#define PCI_ISR_AHBE 0x00000008
+#define PCI_ISR_APDC 0x00000010
+#define PCI_ISR_PADC 0x00000020
+#define PCI_ISR_ADB 0x00000040
+#define PCI_ISR_PDB 0x00000080
+
+/* INTEN (Interrupt Enable) Register bit definitions */
+#define PCI_INTEN_PSE 0x00000001
+#define PCI_INTEN_PFE 0x00000002
+#define PCI_INTEN_PPE 0x00000004
+#define PCI_INTEN_AHBE 0x00000008
+#define PCI_INTEN_APDC 0x00000010
+#define PCI_INTEN_PADC 0x00000020
+#define PCI_INTEN_ADB 0x00000040
+#define PCI_INTEN_PDB 0x00000080
+
+/* Shift value for byte enable on NP cmd/byte enable register */
+#define IXP4XX_PCI_NP_CBE_BESL 4
+
+/* PCI commands supported by NP access unit */
+#define NP_CMD_IOREAD 0x2
+#define NP_CMD_IOWRITE 0x3
+#define NP_CMD_CONFIGREAD 0xA
+#define NP_CMD_CONFIGWRITE 0xB
+#define NP_CMD_MEMREAD 0x6
+#define NP_CMD_MEMWRITE 0x7
+
+/* Constants for CRP access into local config space */
+#define CRP_AD_CBE_BESL 20
+#define CRP_AD_CBE_WRITE 0x00010000
+
+/* USB Device Controller */
+# define IXP4XX_USB_REG(x) (*((volatile u32 *)(x)))
+
+/* SDRAM Controller registers. */
+#define IXP4XX_SDRAM_CONFIG IXP4XX_REG(0xCC000000)
+#define IXP4XX_SDRAM_REFRESH IXP4XX_REG(0xCC000004)
+#define IXP4XX_SDRAM_IR IXP4XX_REG(0xCC000008)
+
+/* "fuse" bits of IXP_EXP_CFG2 */
+/* All IXP4xx CPUs */
+#define IXP4XX_FEATURE_RCOMP (1 << 0)
+#define IXP4XX_FEATURE_USB_DEVICE (1 << 1)
+#define IXP4XX_FEATURE_HASH (1 << 2)
+#define IXP4XX_FEATURE_AES (1 << 3)
+#define IXP4XX_FEATURE_DES (1 << 4)
+#define IXP4XX_FEATURE_HDLC (1 << 5)
+#define IXP4XX_FEATURE_AAL (1 << 6)
+#define IXP4XX_FEATURE_HSS (1 << 7)
+#define IXP4XX_FEATURE_UTOPIA (1 << 8)
+#define IXP4XX_FEATURE_NPEB_ETH0 (1 << 9)
+#define IXP4XX_FEATURE_NPEC_ETH (1 << 10)
+#define IXP4XX_FEATURE_RESET_NPEA (1 << 11)
+#define IXP4XX_FEATURE_RESET_NPEB (1 << 12)
+#define IXP4XX_FEATURE_RESET_NPEC (1 << 13)
+#define IXP4XX_FEATURE_PCI (1 << 14)
+#define IXP4XX_FEATURE_UTOPIA_PHY_LIMIT (3 << 16)
+#define IXP4XX_FEATURE_XSCALE_MAX_FREQ (3 << 22)
+#define IXP42X_FEATURE_MASK (IXP4XX_FEATURE_RCOMP | \
+ IXP4XX_FEATURE_USB_DEVICE | \
+ IXP4XX_FEATURE_HASH | \
+ IXP4XX_FEATURE_AES | \
+ IXP4XX_FEATURE_DES | \
+ IXP4XX_FEATURE_HDLC | \
+ IXP4XX_FEATURE_AAL | \
+ IXP4XX_FEATURE_HSS | \
+ IXP4XX_FEATURE_UTOPIA | \
+ IXP4XX_FEATURE_NPEB_ETH0 | \
+ IXP4XX_FEATURE_NPEC_ETH | \
+ IXP4XX_FEATURE_RESET_NPEA | \
+ IXP4XX_FEATURE_RESET_NPEB | \
+ IXP4XX_FEATURE_RESET_NPEC | \
+ IXP4XX_FEATURE_PCI | \
+ IXP4XX_FEATURE_UTOPIA_PHY_LIMIT | \
+ IXP4XX_FEATURE_XSCALE_MAX_FREQ)
+
+/* IXP43x/46x CPUs */
+#define IXP4XX_FEATURE_ECC_TIMESYNC (1 << 15)
+#define IXP4XX_FEATURE_USB_HOST (1 << 18)
+#define IXP4XX_FEATURE_NPEA_ETH (1 << 19)
+#define IXP43X_FEATURE_MASK (IXP42X_FEATURE_MASK | \
+ IXP4XX_FEATURE_ECC_TIMESYNC | \
+ IXP4XX_FEATURE_USB_HOST | \
+ IXP4XX_FEATURE_NPEA_ETH)
+
+/* IXP46x CPU (including IXP455) only */
+#define IXP4XX_FEATURE_NPEB_ETH_1_TO_3 (1 << 20)
+#define IXP4XX_FEATURE_RSA (1 << 21)
+#define IXP46X_FEATURE_MASK (IXP43X_FEATURE_MASK | \
+ IXP4XX_FEATURE_NPEB_ETH_1_TO_3 | \
+ IXP4XX_FEATURE_RSA)
+
+#endif
diff --git a/drivers/serial/serial_ns16550.c b/drivers/serial/serial_ns16550.c
index b7913aa..be1b968 100644
--- a/drivers/serial/serial_ns16550.c
+++ b/drivers/serial/serial_ns16550.c
@@ -137,7 +137,11 @@ static void ns16550_serial_init_port(struct console_device *cdev)
{
/* initializing the device for the first time */
ns16550_write(cdev, 0x00, lcr); /* select ier reg */
+#ifdef CONFIG_ARCH_IXP4XX
+ ns16550_write(cdev, IER_UUE, ier); /* Enable UART operation */
+#else
ns16550_write(cdev, 0x00, ier);
+#endif
#ifdef CONFIG_DRIVER_SERIAL_NS16550_OMAP_EXTENSIONS
ns16550_write(cdev, 0x07, mdr1); /* Disable */
diff --git a/drivers/serial/serial_ns16550.h b/drivers/serial/serial_ns16550.h
index db8fe64..132f46e 100644
--- a/drivers/serial/serial_ns16550.h
+++ b/drivers/serial/serial_ns16550.h
@@ -50,6 +50,8 @@
#define dll rbr
#define dlm ier
+#define IER_UUE 0x40 /* UART Unit Enable (XScale) */
+
#define FCR_FIFO_EN 0x01 /* Fifo enable */
#define FCR_RXSR 0x02 /* Receiver soft reset */
#define FCR_TXSR 0x04 /* Transmitter soft reset */
--
Krzysztof Halasa
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next prev parent reply other threads:[~2013-04-07 19:54 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-30 11:19 IXP4xx again Krzysztof Halasa
2013-03-30 11:24 ` [PATCH] ARM: XScale processors don't support "clean+invalidate D entry" operation Krzysztof Halasa
2013-03-30 11:25 ` [PATCH] Implement ALTERNATE memory layout Krzysztof Halasa
2013-03-30 12:01 ` Alexander Shiyan
2013-03-30 13:15 ` Krzysztof Halasa
2013-03-30 13:23 ` Re[2]: " Alexander Shiyan
2013-03-30 19:57 ` Krzysztof Halasa
2013-03-30 18:45 ` Antony Pavlov
2013-04-01 18:04 ` Sascha Hauer
2013-04-02 7:20 ` Sascha Hauer
2013-03-30 11:26 ` [PATCH] ARM: Add support for IXP4xx CPU and for Goramo Multilink router platform Krzysztof Halasa
2013-04-02 6:52 ` Sascha Hauer
2013-04-07 11:42 ` Krzysztof Halasa
2013-04-07 19:54 ` Krzysztof Halasa [this message]
2013-04-08 7:27 ` [PATCH] ARM: Support for IXP4xx CPU Jean-Christophe PLAGNIOL-VILLARD
2013-04-14 10:30 ` Krzysztof Halasa
2013-04-14 11:51 ` Jean-Christophe PLAGNIOL-VILLARD
2013-04-07 19:55 ` [PATCH] ARM: Support for IXP4xx hardware Queue Manager Krzysztof Halasa
2013-04-08 7:31 ` Jean-Christophe PLAGNIOL-VILLARD
2013-04-07 19:57 ` [PATCH] ARM: Support for IXP4xx Network Processor Engines (NPEs) Krzysztof Halasa
2013-04-08 7:30 ` Jean-Christophe PLAGNIOL-VILLARD
2013-04-07 19:58 ` [PATCH] ARM: Support for IXP4xx built-in Ethernet interfaces Krzysztof Halasa
2013-04-08 7:29 ` Jean-Christophe PLAGNIOL-VILLARD
2013-04-08 7:56 ` [PATCH] ARM: Add support for IXP4xx CPU and for Goramo Multilink router platform Sascha Hauer
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