diff options
Diffstat (limited to 'target/linux/generic/patches-2.6.39/105-alix_platform_leds.patch')
| -rw-r--r-- | target/linux/generic/patches-2.6.39/105-alix_platform_leds.patch | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.39/105-alix_platform_leds.patch b/target/linux/generic/patches-2.6.39/105-alix_platform_leds.patch new file mode 100644 index 0000000000..b6feacf843 --- /dev/null +++ b/target/linux/generic/patches-2.6.39/105-alix_platform_leds.patch @@ -0,0 +1,502 @@ +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> +--- + +diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig +index f1833e3..d18e7a2 100644 +--- a/arch/x86/Kconfig ++++ b/arch/x86/Kconfig +@@ -2073,6 +2073,20 @@ config OLPC_XO15_SCI + - AC adapter status updates + - Battery status updates + ++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 +diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile +index 021eee9..8d87439 100644 +--- 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/ +diff --git a/arch/x86/platform/geode/Makefile b/arch/x86/platform/geode/Makefile +new file mode 100644 +index 0000000..07c9cd0 +--- /dev/null ++++ b/arch/x86/platform/geode/Makefile +@@ -0,0 +1 @@ ++obj-$(CONFIG_ALIX) += alix.o +diff --git a/arch/x86/platform/geode/alix.c b/arch/x86/platform/geode/alix.c +new file mode 100644 +index 0000000..f3f01e2 +--- /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"); +diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig +index b591e72..8974d27 100644 +--- a/drivers/leds/Kconfig ++++ b/drivers/leds/Kconfig +@@ -107,14 +107,6 @@ + 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 +diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile +index bbfd2e3..a0a1b89 100644 +--- a/drivers/leds/Makefile ++++ b/drivers/leds/Makefile +@@ -16,7 +16,6 @@ obj-$(CONFIG_LEDS_AMS_DELTA) += leds-ams-delta.o + 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 +diff --git a/drivers/leds/leds-alix2.c b/drivers/leds/leds-alix2.c +deleted file mode 100644 +index f59ffad..0000000 +--- 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"); |