Convert au1000 to using gpiolib, fixes an oops on startup
SVN-Revision: 13935
This commit is contained in:
Florian Fainelli
parent
43fe08b4d2
commit
be28e9d438
2 changed files with 400 additions and 0 deletions
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@ -99,6 +99,7 @@ CONFIG_INPUT_KEYBOARD=y
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CONFIG_IRQ_CPU=y
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CONFIG_KEXEC=y
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# CONFIG_KEYBOARD_ATKBD is not set
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CONFIG_KEYBOARD_GPIO=y
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# CONFIG_KEYBOARD_LKKBD is not set
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# CONFIG_KEYBOARD_NEWTON is not set
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# CONFIG_KEYBOARD_STOWAWAY is not set
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399
target/linux/au1000/patches-2.6.27/007-gpiolib.patch
Normal file
399
target/linux/au1000/patches-2.6.27/007-gpiolib.patch
Normal file
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@ -0,0 +1,399 @@
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diff -urN linux-2.6.27.7/arch/mips/au1000/Kconfig linux-2.6.27.7.new/arch/mips/au1000/Kconfig
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--- linux-2.6.27.7/arch/mips/au1000/Kconfig 2008-11-21 00:02:37.000000000 +0100
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+++ linux-2.6.27.7.new/arch/mips/au1000/Kconfig 2008-12-08 11:44:09.000000000 +0100
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@@ -134,3 +134,4 @@
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select SYS_HAS_CPU_MIPS32_R1
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select SYS_SUPPORTS_32BIT_KERNEL
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select SYS_SUPPORTS_APM_EMULATION
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+ select ARCH_REQUIRE_GPIOLIB
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diff -urN linux-2.6.27.7/arch/mips/au1000/common/gpio.c linux-2.6.27.7.new/arch/mips/au1000/common/gpio.c
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--- linux-2.6.27.7/arch/mips/au1000/common/gpio.c 2008-11-21 00:02:37.000000000 +0100
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+++ linux-2.6.27.7.new/arch/mips/au1000/common/gpio.c 2008-12-08 11:58:30.000000000 +0100
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@@ -1,5 +1,5 @@
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/*
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- * Copyright (C) 2007, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
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+ * Copyright (C) 2007-2008, OpenWrt.org, Florian Fainelli <florian@openwrt.org>
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* Architecture specific GPIO support
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*
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* This program is free software; you can redistribute it and/or modify it
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@@ -27,122 +27,222 @@
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* others have a second one : GPIO2
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*/
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+#include <linux/kernel.h>
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#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/platform_device.h>
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+#include <linux/gpio.h>
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#include <asm/mach-au1x00/au1000.h>
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-#include <asm/gpio.h>
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+#include <asm/mach-au1x00/gpio.h>
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-#define gpio1 sys
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-#if !defined(CONFIG_SOC_AU1000)
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+struct au1000_gpio_chip {
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+ struct gpio_chip chip;
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+ void __iomem *regbase;
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+};
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-static struct au1x00_gpio2 *const gpio2 = (struct au1x00_gpio2 *) GPIO2_BASE;
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+#if !defined(CONFIG_SOC_AU1000)
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#define GPIO2_OUTPUT_ENABLE_MASK 0x00010000
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-static int au1xxx_gpio2_read(unsigned gpio)
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+/*
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+ * Return GPIO bank 2 level
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+ */
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+static int au1000_gpio2_get(struct gpio_chip *chip, unsigned offset)
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{
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- gpio -= AU1XXX_GPIO_BASE;
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- return ((gpio2->pinstate >> gpio) & 0x01);
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+ u32 mask = 1 << offset;
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+ struct au1000_gpio_chip *gpch;
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+
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+ gpch = container_of(chip, struct au1000_gpio_chip, chip);
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+ return readl(gpch->regbase + AU1000_GPIO2_ST) & mask;
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}
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-static void au1xxx_gpio2_write(unsigned gpio, int value)
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+/*
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+ * Set output GPIO bank 2 level
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+ */
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+static void au1000_gpio2_set(struct gpio_chip *chip,
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+ unsigned offset, int value)
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{
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- gpio -= AU1XXX_GPIO_BASE;
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-
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- gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << gpio) | ((!!value) << gpio);
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+ u32 mask = (!!value) << offset;
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+ struct au1000_gpio_chip *gpch;
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+ unsigned long flags;
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+
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+ gpch = container_of(chip, struct au1000_gpio_chip, chip);
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+
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+ local_irq_save(flags);
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+ writel((GPIO2_OUTPUT_ENABLE_MASK << offset) | mask,
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+ gpch->regbase + AU1000_GPIO2_OUT);
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+ local_irq_restore(flags);
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}
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-static int au1xxx_gpio2_direction_input(unsigned gpio)
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+/*
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+ * Set GPIO bank 2 direction to input
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+ */
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+static int au1000_gpio2_direction_input(struct gpio_chip *chip, unsigned offset)
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{
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- gpio -= AU1XXX_GPIO_BASE;
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- gpio2->dir &= ~(0x01 << gpio);
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+ unsigned long flags;
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+ u32 mask = 1 << offset;
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+ u32 value;
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+ struct au1000_gpio_chip *gpch;
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+ void __iomem *gpdr;
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+
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+ gpch = container_of(chip, struct au1000_gpio_chip, chip);
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+ gpdr = gpch->regbase + AU1000_GPIO2_DIR;
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+
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+ local_irq_save(flags);
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+ value = readl(gpdr);
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+ value &= ~mask;
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+ writel(value, gpdr);
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+ local_irq_restore(flags);
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+
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return 0;
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}
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-static int au1xxx_gpio2_direction_output(unsigned gpio, int value)
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+/*
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+ * Set GPIO bank2 direction to output
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+ */
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+static int au1000_gpio2_direction_output(struct gpio_chip *chip,
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+ unsigned offset, int value)
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{
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- gpio -= AU1XXX_GPIO_BASE;
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- gpio2->dir |= 0x01 << gpio;
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- gpio2->output = (GPIO2_OUTPUT_ENABLE_MASK << gpio) | ((!!value) << gpio);
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+ unsigned long flags;
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+ u32 mask = 1 << offset;
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+ u32 tmp;
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+ struct au1000_gpio_chip *gpch;
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+ void __iomem *gpdr;
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+
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+ gpch = container_of(chip, struct au1000_gpio_chip, chip);
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+ gpdr = gpch->regbase + AU1000_GPIO2_DIR;
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+
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+ local_irq_save(flags);
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+ tmp = readl(gpdr);
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+ tmp |= mask;
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+ writel(tmp, gpdr);
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+ mask = (!!value) << offset;
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+ writel((GPIO2_OUTPUT_ENABLE_MASK << offset) | mask,
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+ gpch->regbase + AU1000_GPIO2_OUT);
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+ local_irq_restore(flags);
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+
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return 0;
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}
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-
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#endif /* !defined(CONFIG_SOC_AU1000) */
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-static int au1xxx_gpio1_read(unsigned gpio)
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+/*
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+ * Return GPIO bank 2 level
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+ */
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+static int au1000_gpio1_get(struct gpio_chip *chip, unsigned offset)
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{
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- return (gpio1->pinstaterd >> gpio) & 0x01;
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+ u32 mask = 1 << offset;
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+ struct au1000_gpio_chip *gpch;
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+
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+ gpch = container_of(chip, struct au1000_gpio_chip, chip);
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+ return readl(gpch->regbase + 0x0110) & mask;
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}
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-static void au1xxx_gpio1_write(unsigned gpio, int value)
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+/*
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+ * Set GPIO bank 1 level
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+ */
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+static void au1000_gpio1_set(struct gpio_chip *chip,
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+ unsigned offset, int value)
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{
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+ unsigned long flags;
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+ u32 mask = 1 << offset;
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+ struct au1000_gpio_chip *gpch;
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+
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+ gpch = container_of(chip, struct au1000_gpio_chip, chip);
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+
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+ local_irq_save(flags);
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if (value)
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- gpio1->outputset = (0x01 << gpio);
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+ writel(mask, gpch->regbase + 0x0108);
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else
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- /* Output a zero */
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- gpio1->outputclr = (0x01 << gpio);
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+ writel(mask, gpch->regbase + 0x010C);
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+ local_irq_restore(flags);
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}
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-static int au1xxx_gpio1_direction_input(unsigned gpio)
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+/*
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+ * Set GPIO bank 1 direction to input
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+ */
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+static int au1000_gpio1_direction_input(struct gpio_chip *chip, unsigned offset)
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{
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- gpio1->pininputen = (0x01 << gpio);
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- return 0;
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-}
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+ unsigned long flags;
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+ u32 mask = 1 << offset;
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+ u32 value;
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+ struct au1000_gpio_chip *gpch;
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+ void __iomem *gpdr;
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+
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+ gpch = container_of(chip, struct au1000_gpio_chip, chip);
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+ gpdr = gpch->regbase + 0x0110;
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+
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+ local_irq_save(flags);
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+ value = readl(gpdr);
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+ value |= mask;
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+ writel(mask, gpdr);
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+ local_irq_restore(flags);
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-static int au1xxx_gpio1_direction_output(unsigned gpio, int value)
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-{
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- gpio1->trioutclr = (0x01 & gpio);
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- au1xxx_gpio1_write(gpio, value);
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return 0;
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}
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-int au1xxx_gpio_get_value(unsigned gpio)
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+/*
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+ * Set GPIO bank 1 direction to output
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+ */
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+static int au1000_gpio1_direction_output(struct gpio_chip *chip,
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+ unsigned offset, int value)
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{
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- if (gpio >= AU1XXX_GPIO_BASE)
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-#if defined(CONFIG_SOC_AU1000)
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- return 0;
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-#else
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- return au1xxx_gpio2_read(gpio);
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-#endif
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+ unsigned long flags;
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+ u32 mask = 1 << offset;
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+ u32 tmp;
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+ struct au1000_gpio_chip *gpch;
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+ void __iomem *gpdr;
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+
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+ gpch = container_of(chip, struct au1000_gpio_chip, chip);
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+ gpdr = gpch->regbase + 0x0100;
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+
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+ local_irq_save(flags);
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+ tmp = readl(gpdr);
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+ writel(tmp, gpdr);
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+ if (value)
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+ writel(mask, gpch->regbase + 0x0108);
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else
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- return au1xxx_gpio1_read(gpio);
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-}
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-EXPORT_SYMBOL(au1xxx_gpio_get_value);
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+ writel(mask, gpch->regbase + 0x0108);
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+ local_irq_restore(flags);
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-void au1xxx_gpio_set_value(unsigned gpio, int value)
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-{
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- if (gpio >= AU1XXX_GPIO_BASE)
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-#if defined(CONFIG_SOC_AU1000)
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- ;
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-#else
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- au1xxx_gpio2_write(gpio, value);
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-#endif
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- else
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- au1xxx_gpio1_write(gpio, value);
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+ return 0;
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}
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-EXPORT_SYMBOL(au1xxx_gpio_set_value);
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-int au1xxx_gpio_direction_input(unsigned gpio)
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-{
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- if (gpio >= AU1XXX_GPIO_BASE)
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-#if defined(CONFIG_SOC_AU1000)
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- return -ENODEV;
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-#else
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- return au1xxx_gpio2_direction_input(gpio);
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+struct au1000_gpio_chip au1000_gpio_chip[] = {
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+ [0] = {
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+ .regbase = (void __iomem *)SYS_BASE,
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+ .chip = {
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+ .label = "au1000-gpio1",
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+ .direction_input = au1000_gpio1_direction_input,
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+ .direction_output = au1000_gpio1_direction_output,
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+ .get = au1000_gpio1_get,
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+ .set = au1000_gpio1_set,
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+ .base = 0,
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+ .ngpio = 32,
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+ },
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+ },
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+#if !defined(CONFIG_SOC_AU1000)
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+ [1] = {
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+ .regbase = (void __iomem *)GPIO2_BASE,
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+ .chip = {
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+ .label = "au1000-gpio2",
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+ .direction_input = au1000_gpio2_direction_input,
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+ .direction_output = au1000_gpio2_direction_output,
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+ .get = au1000_gpio2_get,
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+ .set = au1000_gpio2_set,
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+ .base = AU1XXX_GPIO_BASE,
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+ .ngpio = 32,
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+ },
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+ },
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#endif
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+};
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- return au1xxx_gpio1_direction_input(gpio);
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-}
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-EXPORT_SYMBOL(au1xxx_gpio_direction_input);
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-
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-int au1xxx_gpio_direction_output(unsigned gpio, int value)
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+int __init au1000_gpio_init(void)
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{
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- if (gpio >= AU1XXX_GPIO_BASE)
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-#if defined(CONFIG_SOC_AU1000)
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- return -ENODEV;
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-#else
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- return au1xxx_gpio2_direction_output(gpio, value);
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+ gpiochip_add(&au1000_gpio_chip[0].chip);
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+#if !defined(CONFIG_SOC_AU1000)
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+ gpiochip_add(&au1000_gpio_chip[1].chip);
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#endif
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- return au1xxx_gpio1_direction_output(gpio, value);
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+ return 0;
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}
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-EXPORT_SYMBOL(au1xxx_gpio_direction_output);
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+arch_initcall(au1000_gpio_init);
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diff -urN linux-2.6.27.7/include/asm-mips/mach-au1x00/gpio.h linux-2.6.27.7.new/include/asm-mips/mach-au1x00/gpio.h
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--- linux-2.6.27.7/include/asm-mips/mach-au1x00/gpio.h 2008-11-21 00:02:37.000000000 +0100
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+++ linux-2.6.27.7.new/include/asm-mips/mach-au1x00/gpio.h 2008-12-08 11:43:37.000000000 +0100
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@@ -1,69 +1,21 @@
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#ifndef _AU1XXX_GPIO_H_
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#define _AU1XXX_GPIO_H_
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-#include <linux/types.h>
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-
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#define AU1XXX_GPIO_BASE 200
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-struct au1x00_gpio2 {
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- u32 dir;
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- u32 reserved;
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- u32 output;
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- u32 pinstate;
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- u32 inten;
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- u32 enable;
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-};
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-
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-extern int au1xxx_gpio_get_value(unsigned gpio);
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-extern void au1xxx_gpio_set_value(unsigned gpio, int value);
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-extern int au1xxx_gpio_direction_input(unsigned gpio);
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-extern int au1xxx_gpio_direction_output(unsigned gpio, int value);
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-
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-
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-/* Wrappers for the arch-neutral GPIO API */
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-
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-static inline int gpio_request(unsigned gpio, const char *label)
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-{
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- /* Not yet implemented */
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- return 0;
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-}
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-
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-static inline void gpio_free(unsigned gpio)
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-{
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- /* Not yet implemented */
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-}
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-
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-static inline int gpio_direction_input(unsigned gpio)
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-{
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- return au1xxx_gpio_direction_input(gpio);
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-}
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-
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-static inline int gpio_direction_output(unsigned gpio, int value)
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-{
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- return au1xxx_gpio_direction_output(gpio, value);
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-}
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-
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-static inline int gpio_get_value(unsigned gpio)
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-{
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- return au1xxx_gpio_get_value(gpio);
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-}
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-
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-static inline void gpio_set_value(unsigned gpio, int value)
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-{
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- au1xxx_gpio_set_value(gpio, value);
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-}
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-
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-static inline int gpio_to_irq(unsigned gpio)
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-{
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- return gpio;
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-}
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-
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-static inline int irq_to_gpio(unsigned irq)
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-{
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- return irq;
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-}
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+#define AU1000_GPIO2_DIR 0x00
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+#define AU1000_GPIO2_RSVD 0x04
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+#define AU1000_GPIO2_OUT 0x08
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+#define AU1000_GPIO2_ST 0x0C
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+#define AU1000_GPIO2_INT 0x10
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+#define AU1000_GPIO2_EN 0x14
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+
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+#define gpio_get_value __gpio_get_value
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+#define gpio_set_value __gpio_set_value
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+
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+#define gpio_to_irq(gpio) NULL
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+#define irq_to_gpio(irq) NULL
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-/* For cansleep */
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#include <asm-generic/gpio.h>
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#endif /* _AU1XXX_GPIO_H_ */
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