mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-27 06:22:03 +02:00
dee25761b4
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@29042 3c298f89-4303-0410-b956-a3cf2f4a3e73
486 lines
12 KiB
Diff
486 lines
12 KiB
Diff
From: Ed Wildgoose <git@wildgooses.com>
|
|
Date: Wed, 3 Aug 2011 00:52:36 +0000 (+1000)
|
|
Subject: This new driver replaces the old PCEngines Alix 2/3 LED driver with a new
|
|
X-Git-Tag: next-20110812~1^2~75
|
|
X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fnext%2Flinux-next.git;a=commitdiff_plain;h=2cd7b3e8f8078c214c93a2c60cb845500c92df4a;hp=dc849eae35bbf651ab3ee459f5683e1ff780413d
|
|
|
|
This new driver replaces the old PCEngines Alix 2/3 LED driver with a new
|
|
driver that controls the LEDs through the leds-gpio driver. The old
|
|
driver accessed GPIOs directly, which created a conflict and prevented
|
|
also loading the cs5535-gpio driver to read other GPIOs on the Alix board.
|
|
With this new driver, we hook into leds-gpio which in turn uses GPIO to
|
|
control the LEDs and therefore it's possible to control both the LEDs and
|
|
access onboard GPIOs
|
|
|
|
Driver is moved to platform/geode and any other geode initialisation
|
|
modules should move here also.
|
|
|
|
This driver is inspired by leds-net5501.c by Alessandro Zummo.
|
|
|
|
Ideally, leds-net5501.c should also be moved to platform/geode.
|
|
Additionally the driver relies on parts of the patch: 7f131cf3ed ("leds:
|
|
leds-alix2c - take port address from MSR) by Daniel Mack to perform
|
|
detection of the Alix board.
|
|
|
|
Signed-off-by: Ed Wildgoose <kernel@wildgooses.com>
|
|
Cc: Alessandro Zummo <a.zummo@towertech.it>
|
|
Cc: Daniel Mack <daniel@caiaq.de>
|
|
Reviewed-by: Grant Likely <grant.likely@secretlab.ca>
|
|
Cc: Ingo Molnar <mingo@elte.hu>
|
|
Cc: Thomas Gleixner <tglx@linutronix.de>
|
|
Cc: "H. Peter Anvin" <hpa@zytor.com>
|
|
Cc: Richard Purdie <rpurdie@rpsys.net>
|
|
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
|
|
---
|
|
|
|
--- a/arch/x86/Kconfig
|
|
+++ b/arch/x86/Kconfig
|
|
@@ -2087,6 +2087,20 @@ config OLPC_XO1
|
|
---help---
|
|
Add support for non-essential features of the OLPC XO-1 laptop.
|
|
|
|
+config ALIX
|
|
+ bool "PCEngines ALIX System Support (LED setup)"
|
|
+ select GPIOLIB
|
|
+ ---help---
|
|
+ This option enables system support for the PCEngines ALIX.
|
|
+ At present this just sets up LEDs for GPIO control on
|
|
+ ALIX2/3/6 boards. However, other system specific setup should
|
|
+ get added here.
|
|
+
|
|
+ Note: You must still enable the drivers for GPIO and LED support
|
|
+ (GPIO_CS5535 & LEDS_GPIO) to actually use the LEDs
|
|
+
|
|
+ Note: You have to set alix.force=1 for boards with Award BIOS.
|
|
+
|
|
endif # X86_32
|
|
|
|
config AMD_NB
|
|
--- a/arch/x86/platform/Makefile
|
|
+++ b/arch/x86/platform/Makefile
|
|
@@ -1,6 +1,7 @@
|
|
# Platform specific code goes here
|
|
obj-y += ce4100/
|
|
obj-y += efi/
|
|
+obj-y += geode/
|
|
obj-y += iris/
|
|
obj-y += mrst/
|
|
obj-y += olpc/
|
|
--- /dev/null
|
|
+++ b/arch/x86/platform/geode/Makefile
|
|
@@ -0,0 +1 @@
|
|
+obj-$(CONFIG_ALIX) += alix.o
|
|
--- /dev/null
|
|
+++ b/arch/x86/platform/geode/alix.c
|
|
@@ -0,0 +1,141 @@
|
|
+/*
|
|
+ * System Specific setup for PCEngines ALIX.
|
|
+ * At the moment this means setup of GPIO control of LEDs
|
|
+ * on Alix.2/3/6 boards.
|
|
+ *
|
|
+ *
|
|
+ * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
|
|
+ * Copyright (C) 2011 Ed Wildgoose <kernel@wildgooses.com>
|
|
+ *
|
|
+ * TODO: There are large similarities with leds-net5501.c
|
|
+ * by Alessandro Zummo <a.zummo@towertech.it>
|
|
+ * In the future leds-net5501.c should be migrated over to platform
|
|
+ *
|
|
+ * 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.
|
|
+ */
|
|
+
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/io.h>
|
|
+#include <linux/string.h>
|
|
+#include <linux/leds.h>
|
|
+#include <linux/platform_device.h>
|
|
+#include <linux/gpio.h>
|
|
+
|
|
+#include <asm/geode.h>
|
|
+
|
|
+static int force = 0;
|
|
+module_param(force, bool, 0444);
|
|
+/* FIXME: Award bios is not automatically detected as Alix platform */
|
|
+MODULE_PARM_DESC(force, "Force detection as ALIX.2/ALIX.3 platform");
|
|
+
|
|
+static struct gpio_led alix_leds[] = {
|
|
+ {
|
|
+ .name = "alix:1",
|
|
+ .gpio = 6,
|
|
+ .default_trigger = "default-on",
|
|
+ .active_low = 1,
|
|
+ },
|
|
+ {
|
|
+ .name = "alix:2",
|
|
+ .gpio = 25,
|
|
+ .default_trigger = "default-off",
|
|
+ .active_low = 1,
|
|
+ },
|
|
+ {
|
|
+ .name = "alix:3",
|
|
+ .gpio = 27,
|
|
+ .default_trigger = "default-off",
|
|
+ .active_low = 1,
|
|
+ },
|
|
+};
|
|
+
|
|
+static struct gpio_led_platform_data alix_leds_data = {
|
|
+ .num_leds = ARRAY_SIZE(alix_leds),
|
|
+ .leds = alix_leds,
|
|
+};
|
|
+
|
|
+static struct platform_device alix_leds_dev = {
|
|
+ .name = "leds-gpio",
|
|
+ .id = -1,
|
|
+ .dev.platform_data = &alix_leds_data,
|
|
+};
|
|
+
|
|
+static void __init register_alix(void)
|
|
+{
|
|
+ /* Setup LED control through leds-gpio driver */
|
|
+ platform_device_register(&alix_leds_dev);
|
|
+}
|
|
+
|
|
+static int __init alix_present(unsigned long bios_phys,
|
|
+ const char *alix_sig,
|
|
+ size_t alix_sig_len)
|
|
+{
|
|
+ const size_t bios_len = 0x00010000;
|
|
+ const char *bios_virt;
|
|
+ const char *scan_end;
|
|
+ const char *p;
|
|
+ char name[64];
|
|
+
|
|
+ if (force) {
|
|
+ printk(KERN_NOTICE "%s: forced to skip BIOS test, "
|
|
+ "assume system is ALIX.2/ALIX.3\n",
|
|
+ KBUILD_MODNAME);
|
|
+ return 1;
|
|
+ }
|
|
+
|
|
+ bios_virt = phys_to_virt(bios_phys);
|
|
+ scan_end = bios_virt + bios_len - (alix_sig_len + 2);
|
|
+ for (p = bios_virt; p < scan_end; p++) {
|
|
+ const char *tail;
|
|
+ char *a;
|
|
+
|
|
+ if (memcmp(p, alix_sig, alix_sig_len) != 0)
|
|
+ continue;
|
|
+
|
|
+ memcpy(name, p, sizeof(name));
|
|
+
|
|
+ /* remove the first \0 character from string */
|
|
+ a = strchr(name, '\0');
|
|
+ if (a)
|
|
+ *a = ' ';
|
|
+
|
|
+ /* cut the string at a newline */
|
|
+ a = strchr(name, '\r');
|
|
+ if (a)
|
|
+ *a = '\0';
|
|
+
|
|
+ tail = p + alix_sig_len;
|
|
+ if ((tail[0] == '2' || tail[0] == '3')) {
|
|
+ printk(KERN_INFO
|
|
+ "%s: system is recognized as \"%s\"\n",
|
|
+ KBUILD_MODNAME, name);
|
|
+ return 1;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int __init alix_init(void)
|
|
+{
|
|
+ const char tinybios_sig[] = "PC Engines ALIX.";
|
|
+ const char coreboot_sig[] = "PC Engines\0ALIX.";
|
|
+
|
|
+ if (!is_geode())
|
|
+ return 0;
|
|
+
|
|
+ if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
|
|
+ alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
|
|
+ register_alix();
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+module_init(alix_init);
|
|
+
|
|
+MODULE_AUTHOR("Ed Wildgoose <kernel@wildgooses.com>");
|
|
+MODULE_DESCRIPTION("PCEngines ALIX System Setup");
|
|
+MODULE_LICENSE("GPL");
|
|
--- a/drivers/leds/Kconfig
|
|
+++ b/drivers/leds/Kconfig
|
|
@@ -107,14 +107,6 @@ config LEDS_WRAP
|
|
help
|
|
This option enables support for the PCEngines WRAP programmable LEDs.
|
|
|
|
-config LEDS_ALIX2
|
|
- tristate "LED Support for ALIX.2 and ALIX.3 series"
|
|
- depends on LEDS_CLASS
|
|
- depends on X86 && !GPIO_CS5535 && !CS5535_GPIO
|
|
- help
|
|
- This option enables support for the PCEngines ALIX.2 and ALIX.3 LEDs.
|
|
- You have to set leds-alix2.force=1 for boards with Award BIOS.
|
|
-
|
|
config LEDS_H1940
|
|
tristate "LED Support for iPAQ H1940 device"
|
|
depends on LEDS_CLASS
|
|
--- a/drivers/leds/Makefile
|
|
+++ b/drivers/leds/Makefile
|
|
@@ -16,7 +16,6 @@ obj-$(CONFIG_LEDS_AMS_DELTA) += leds-am
|
|
obj-$(CONFIG_LEDS_NET48XX) += leds-net48xx.o
|
|
obj-$(CONFIG_LEDS_NET5501) += leds-net5501.o
|
|
obj-$(CONFIG_LEDS_WRAP) += leds-wrap.o
|
|
-obj-$(CONFIG_LEDS_ALIX2) += leds-alix2.o
|
|
obj-$(CONFIG_LEDS_H1940) += leds-h1940.o
|
|
obj-$(CONFIG_LEDS_COBALT_QUBE) += leds-cobalt-qube.o
|
|
obj-$(CONFIG_LEDS_COBALT_RAQ) += leds-cobalt-raq.o
|
|
--- a/drivers/leds/leds-alix2.c
|
|
+++ /dev/null
|
|
@@ -1,239 +0,0 @@
|
|
-/*
|
|
- * LEDs driver for PCEngines ALIX.2 and ALIX.3
|
|
- *
|
|
- * Copyright (C) 2008 Constantin Baranov <const@mimas.ru>
|
|
- */
|
|
-
|
|
-#include <linux/err.h>
|
|
-#include <linux/io.h>
|
|
-#include <linux/kernel.h>
|
|
-#include <linux/leds.h>
|
|
-#include <linux/module.h>
|
|
-#include <linux/platform_device.h>
|
|
-#include <linux/string.h>
|
|
-#include <linux/pci.h>
|
|
-
|
|
-static int force = 0;
|
|
-module_param(force, bool, 0444);
|
|
-MODULE_PARM_DESC(force, "Assume system has ALIX.2/ALIX.3 style LEDs");
|
|
-
|
|
-#define MSR_LBAR_GPIO 0x5140000C
|
|
-#define CS5535_GPIO_SIZE 256
|
|
-
|
|
-static u32 gpio_base;
|
|
-
|
|
-static struct pci_device_id divil_pci[] = {
|
|
- { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_CS5535_ISA) },
|
|
- { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA) },
|
|
- { } /* NULL entry */
|
|
-};
|
|
-MODULE_DEVICE_TABLE(pci, divil_pci);
|
|
-
|
|
-struct alix_led {
|
|
- struct led_classdev cdev;
|
|
- unsigned short port;
|
|
- unsigned int on_value;
|
|
- unsigned int off_value;
|
|
-};
|
|
-
|
|
-static void alix_led_set(struct led_classdev *led_cdev,
|
|
- enum led_brightness brightness)
|
|
-{
|
|
- struct alix_led *led_dev =
|
|
- container_of(led_cdev, struct alix_led, cdev);
|
|
-
|
|
- if (brightness)
|
|
- outl(led_dev->on_value, gpio_base + led_dev->port);
|
|
- else
|
|
- outl(led_dev->off_value, gpio_base + led_dev->port);
|
|
-}
|
|
-
|
|
-static struct alix_led alix_leds[] = {
|
|
- {
|
|
- .cdev = {
|
|
- .name = "alix:1",
|
|
- .brightness_set = alix_led_set,
|
|
- },
|
|
- .port = 0x00,
|
|
- .on_value = 1 << 22,
|
|
- .off_value = 1 << 6,
|
|
- },
|
|
- {
|
|
- .cdev = {
|
|
- .name = "alix:2",
|
|
- .brightness_set = alix_led_set,
|
|
- },
|
|
- .port = 0x80,
|
|
- .on_value = 1 << 25,
|
|
- .off_value = 1 << 9,
|
|
- },
|
|
- {
|
|
- .cdev = {
|
|
- .name = "alix:3",
|
|
- .brightness_set = alix_led_set,
|
|
- },
|
|
- .port = 0x80,
|
|
- .on_value = 1 << 27,
|
|
- .off_value = 1 << 11,
|
|
- },
|
|
-};
|
|
-
|
|
-static int __init alix_led_probe(struct platform_device *pdev)
|
|
-{
|
|
- int i;
|
|
- int ret;
|
|
-
|
|
- for (i = 0; i < ARRAY_SIZE(alix_leds); i++) {
|
|
- alix_leds[i].cdev.flags |= LED_CORE_SUSPENDRESUME;
|
|
- ret = led_classdev_register(&pdev->dev, &alix_leds[i].cdev);
|
|
- if (ret < 0)
|
|
- goto fail;
|
|
- }
|
|
- return 0;
|
|
-
|
|
-fail:
|
|
- while (--i >= 0)
|
|
- led_classdev_unregister(&alix_leds[i].cdev);
|
|
- return ret;
|
|
-}
|
|
-
|
|
-static int alix_led_remove(struct platform_device *pdev)
|
|
-{
|
|
- int i;
|
|
-
|
|
- for (i = 0; i < ARRAY_SIZE(alix_leds); i++)
|
|
- led_classdev_unregister(&alix_leds[i].cdev);
|
|
- return 0;
|
|
-}
|
|
-
|
|
-static struct platform_driver alix_led_driver = {
|
|
- .remove = alix_led_remove,
|
|
- .driver = {
|
|
- .name = KBUILD_MODNAME,
|
|
- .owner = THIS_MODULE,
|
|
- },
|
|
-};
|
|
-
|
|
-static int __init alix_present(unsigned long bios_phys,
|
|
- const char *alix_sig,
|
|
- size_t alix_sig_len)
|
|
-{
|
|
- const size_t bios_len = 0x00010000;
|
|
- const char *bios_virt;
|
|
- const char *scan_end;
|
|
- const char *p;
|
|
- char name[64];
|
|
-
|
|
- if (force) {
|
|
- printk(KERN_NOTICE "%s: forced to skip BIOS test, "
|
|
- "assume system has ALIX.2 style LEDs\n",
|
|
- KBUILD_MODNAME);
|
|
- return 1;
|
|
- }
|
|
-
|
|
- bios_virt = phys_to_virt(bios_phys);
|
|
- scan_end = bios_virt + bios_len - (alix_sig_len + 2);
|
|
- for (p = bios_virt; p < scan_end; p++) {
|
|
- const char *tail;
|
|
- char *a;
|
|
-
|
|
- if (memcmp(p, alix_sig, alix_sig_len) != 0)
|
|
- continue;
|
|
-
|
|
- memcpy(name, p, sizeof(name));
|
|
-
|
|
- /* remove the first \0 character from string */
|
|
- a = strchr(name, '\0');
|
|
- if (a)
|
|
- *a = ' ';
|
|
-
|
|
- /* cut the string at a newline */
|
|
- a = strchr(name, '\r');
|
|
- if (a)
|
|
- *a = '\0';
|
|
-
|
|
- tail = p + alix_sig_len;
|
|
- if ((tail[0] == '2' || tail[0] == '3')) {
|
|
- printk(KERN_INFO
|
|
- "%s: system is recognized as \"%s\"\n",
|
|
- KBUILD_MODNAME, name);
|
|
- return 1;
|
|
- }
|
|
- }
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-static struct platform_device *pdev;
|
|
-
|
|
-static int __init alix_pci_led_init(void)
|
|
-{
|
|
- u32 low, hi;
|
|
-
|
|
- if (pci_dev_present(divil_pci) == 0) {
|
|
- printk(KERN_WARNING KBUILD_MODNAME": DIVIL not found\n");
|
|
- return -ENODEV;
|
|
- }
|
|
-
|
|
- /* Grab the GPIO I/O range */
|
|
- rdmsr(MSR_LBAR_GPIO, low, hi);
|
|
-
|
|
- /* Check the mask and whether GPIO is enabled (sanity check) */
|
|
- if (hi != 0x0000f001) {
|
|
- printk(KERN_WARNING KBUILD_MODNAME": GPIO not enabled\n");
|
|
- return -ENODEV;
|
|
- }
|
|
-
|
|
- /* Mask off the IO base address */
|
|
- gpio_base = low & 0x0000ff00;
|
|
-
|
|
- if (!request_region(gpio_base, CS5535_GPIO_SIZE, KBUILD_MODNAME)) {
|
|
- printk(KERN_ERR KBUILD_MODNAME": can't allocate I/O for GPIO\n");
|
|
- return -ENODEV;
|
|
- }
|
|
-
|
|
- /* Set GPIO function to output */
|
|
- outl(1 << 6, gpio_base + 0x04);
|
|
- outl(1 << 9, gpio_base + 0x84);
|
|
- outl(1 << 11, gpio_base + 0x84);
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-static int __init alix_led_init(void)
|
|
-{
|
|
- int ret = -ENODEV;
|
|
- const char tinybios_sig[] = "PC Engines ALIX.";
|
|
- const char coreboot_sig[] = "PC Engines\0ALIX.";
|
|
-
|
|
- if (alix_present(0xf0000, tinybios_sig, sizeof(tinybios_sig) - 1) ||
|
|
- alix_present(0x500, coreboot_sig, sizeof(coreboot_sig) - 1))
|
|
- ret = alix_pci_led_init();
|
|
-
|
|
- if (ret < 0)
|
|
- return ret;
|
|
-
|
|
- pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
|
|
- if (!IS_ERR(pdev)) {
|
|
- ret = platform_driver_probe(&alix_led_driver, alix_led_probe);
|
|
- if (ret)
|
|
- platform_device_unregister(pdev);
|
|
- } else
|
|
- ret = PTR_ERR(pdev);
|
|
-
|
|
- return ret;
|
|
-}
|
|
-
|
|
-static void __exit alix_led_exit(void)
|
|
-{
|
|
- platform_device_unregister(pdev);
|
|
- platform_driver_unregister(&alix_led_driver);
|
|
- release_region(gpio_base, CS5535_GPIO_SIZE);
|
|
-}
|
|
-
|
|
-module_init(alix_led_init);
|
|
-module_exit(alix_led_exit);
|
|
-
|
|
-MODULE_AUTHOR("Constantin Baranov <const@mimas.ru>");
|
|
-MODULE_DESCRIPTION("PCEngines ALIX.2 and ALIX.3 LED driver");
|
|
-MODULE_LICENSE("GPL");
|