This patch introduces an interrupt-driven version of the SGI
Indy volume control buttons driver.
Tested using an Indy box.
Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@xxxxxxxxx>
---
arch/mips/sgi-ip22/Makefile | 2 +-
arch/mips/sgi-ip22/ip22-platform.c | 6 +-
arch/mips/sgi-ip22/ip22-reset.c | 3 +-
drivers/input/misc/Kconfig | 11 ++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/sgipanel.c | 219 ++++++++++++++++++++++++++++++++++++
6 files changed, 237 insertions(+), 5 deletions(-)
create mode 100644 drivers/input/misc/sgipanel.c
diff --git a/arch/mips/sgi-ip22/Makefile b/arch/mips/sgi-ip22/Makefile
index ef1564e..416b18f 100644
--- a/arch/mips/sgi-ip22/Makefile
+++ b/arch/mips/sgi-ip22/Makefile
@@ -10,4 +10,4 @@ obj-$(CONFIG_SGI_IP22) += ip22-berr.o
obj-$(CONFIG_SGI_IP28) += ip28-berr.o
obj-$(CONFIG_EISA) += ip22-eisa.o
-# EXTRA_CFLAGS += -Werror
+EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/sgi-ip22/ip22-platform.c b/arch/mips/sgi-ip22/ip22-platform.c
index deddbf0..1380566 100644
--- a/arch/mips/sgi-ip22/ip22-platform.c
+++ b/arch/mips/sgi-ip22/ip22-platform.c
@@ -183,15 +183,15 @@ static int __init sgi_hal2_devinit(void)
device_initcall(sgi_hal2_devinit);
-static int __init sgi_button_devinit(void)
+static int __init sgi_panel_devinit(void)
{
if (ip22_is_fullhouse())
return 0; /* full house has no volume buttons */
- return IS_ERR(platform_device_register_simple("sgibtns", -1, NULL, 0));
+ return IS_ERR(platform_device_register_simple("sgipanel", -1, NULL, 0));
}
-device_initcall(sgi_button_devinit);
+device_initcall(sgi_panel_devinit);
static int __init sgi_ds1286_devinit(void)
{
diff --git a/arch/mips/sgi-ip22/ip22-reset.c b/arch/mips/sgi-ip22/ip22-reset.c
index 4ad5c33..b340fa1 100644
--- a/arch/mips/sgi-ip22/ip22-reset.c
+++ b/arch/mips/sgi-ip22/ip22-reset.c
@@ -191,7 +191,8 @@ static int __init reboot_setup(void)
_machine_halt = sgi_machine_halt;
pm_power_off = sgi_machine_power_off;
- res = request_irq(SGI_PANEL_IRQ, panel_int, 0, "Front Panel", NULL);
+ res = request_irq(SGI_PANEL_IRQ, panel_int, IRQF_SHARED, "Front Panel",
+ reboot_setup);
if (res) {
printk(KERN_ERR "Allocation of front panel IRQ failed\n");
return res;
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 1f93202..47e98e1 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -212,6 +212,17 @@ config INPUT_SGI_O2_BTNS
To compile this driver as a module, choose M here: the module will
be called o2_btns.
+config INPUT_SGI_INDY_PANEL
+ tristate "SGI Indy front panel buttons support"
+ depends on SGI_IP22
+ default m
+ help
+ Select Y here if you want to support SGI Indy volume control
+ buttons.
+
+ To compile this driver as a module, choose M here: the
+ module will be called sgipanel.
+
config HP_SDC_RTC
tristate "HP SDC Real Time Clock"
depends on GSC || HP300
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 2b18c92..d5e197c 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -21,3 +21,4 @@ obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o
obj-$(CONFIG_INPUT_UINPUT) += uinput.o
obj-$(CONFIG_INPUT_APANEL) += apanel.o
obj-$(CONFIG_INPUT_SGI_O2_BTNS) += o2_btns.o
+obj-$(CONFIG_INPUT_SGI_INDY_PANEL) += sgipanel.o
diff --git a/drivers/input/misc/sgipanel.c b/drivers/input/misc/sgipanel.c
new file mode 100644
index 0000000..d1e2092
--- /dev/null
+++ b/drivers/input/misc/sgipanel.c
@@ -0,0 +1,219 @@
+/*
+ * SGI Indy front panel driver
+ *
+ * Copyright (C) 2008 Dmitri Vorobiev <dmitri.vorobiev@xxxxxxxxx>
+ * Based on the polling driver by Thomas Bogendoerfer
+ *
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <linux/bitops.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/jiffies.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <asm/sgi/ioc.h>
+#include <asm/sgi/ip22.h>
+
+#define POLL_INTERVAL_MSECS 30
+#define POLL_INTERVAL msecs_to_jiffies(POLL_INTERVAL_MSECS)
+
+static struct timer_list panel_timer;
+
+static const unsigned short panel_map[] = {
+ KEY_VOLUMEDOWN,
+ KEY_VOLUMEUP,
+};
+
+struct sgipanel {
+ struct input_dev *input;
+ struct timer_list *timer;
+ int pressed[ARRAY_SIZE(panel_map)];
+ int shutting_down;
+ unsigned short keymap[ARRAY_SIZE(panel_map)];
+};
+
+static inline u8 panel_status(void)
+{
+ u8 status;
+
+ status = sgioc->panel;
+ status ^= (SGIOC_PANEL_VOLDNHOLD | SGIOC_PANEL_VOLUPHOLD);
+
+ return ((status & SGIOC_PANEL_VOLUPHOLD) >> 6) |
+ ((status & SGIOC_PANEL_VOLDNHOLD) >> 5);
+}
+
+static void timer(unsigned long data)
+{
+ struct sgipanel *bdev = (struct sgipanel *) data;
+ struct input_dev *input = bdev->input;
+ int status = panel_status();
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(bdev->keymap); i++) {
+ if (status & BIT(i)) {
+ if (!bdev->pressed[i]) {
+ input_event(input, EV_MSC, MSC_SCAN, i);
+ input_report_key(input, bdev->keymap[i], 1);
+ input_sync(input);
+ }
+ bdev->pressed[i] = 1;
+ bdev->timer->expires = jiffies + POLL_INTERVAL;
+ if (!bdev->shutting_down)
+ add_timer(bdev->timer);
+ } else {
+ if (bdev->pressed[i]) {
+ input_event(input, EV_MSC, MSC_SCAN, i);
+ input_report_key(input, bdev->keymap[i], 0);
+ input_sync(input);
+ }
+ bdev->pressed[i] = 0;
+ }
+ }
+}
+
+static irqreturn_t panel_interrupt(int irq, void *data)
+{
+ struct sgipanel *bdev = (struct sgipanel *) data;
+
+ bdev->timer->expires = jiffies;
+ add_timer(bdev->timer);
+ return IRQ_HANDLED;
+}
+
+static int __devinit sgi_indy_panel_probe(struct platform_device *pdev)
+{
+ struct sgipanel *bdev;
+ struct input_dev *input;
+ int i, error;
+
+ /*
+ * Section 2.6.2 of ioc.ps states: "Full House does not have
+ * any support for Volume Control."
+ */
+ if (ip22_is_fullhouse()) {
+ error = -ENODEV;
+ goto err_return;
+ }
+
+ bdev = kzalloc(sizeof(struct sgipanel), GFP_KERNEL);
+ if (!bdev) {
+ error = -ENOMEM;
+ dev_err(&pdev->dev, "Could not allocate memory\n");
+ goto err_return;
+ }
+
+ bdev->timer = &panel_timer;
+
+ init_timer(bdev->timer);
+ bdev->timer->data = (unsigned long) bdev;
+ bdev->timer->function = timer;
+
+ error = request_irq(SGI_PANEL_IRQ, panel_interrupt, IRQF_SHARED,
+ "Front Panel", bdev);
+ if (error) {
+ dev_err(&pdev->dev, "Failed to get IRQ\n");
+ goto err_free_bdev;
+ }
+
+ input = input_allocate_device();
+ if (!input) {
+ error = -ENOMEM;
+ dev_err(&pdev->dev, "Could not allocate input device\n");
+ goto err_free_irq;
+ }
+
+ memcpy(bdev->keymap, panel_map, sizeof(bdev->keymap));
+
+ input->name = "SGI panel";
+ input->phys = "sgi/input0";
+ input->id.bustype = BUS_HOST;
+ input->dev.parent = &pdev->dev;
+
+ input->keycode = bdev->keymap;
+ input->keycodemax = ARRAY_SIZE(bdev->keymap);
+ input->keycodesize = sizeof(unsigned short);
+
+ input_set_capability(input, EV_MSC, MSC_SCAN);
+ __set_bit(EV_KEY, input->evbit);
+ for (i = 0; i < ARRAY_SIZE(panel_map); i++)
+ __set_bit(bdev->keymap[i], input->keybit);
+ __clear_bit(KEY_RESERVED, input->keybit);
+
+ bdev->input = input;
+ dev_set_drvdata(&pdev->dev, bdev);
+
+ error = input_register_device(input);
+ if (error) {
+ dev_err(&pdev->dev, "Could not register input device\n");
+ goto err_free_mem;
+ }
+
+ return 0;
+
+err_free_mem:
+ dev_set_drvdata(&pdev->dev, NULL);
+ input_free_device(input);
+err_free_irq:
+ free_irq(SGI_PANEL_IRQ, bdev);
+err_free_bdev:
+ kfree(bdev);
+err_return:
+ return error;
+}
+
+static int __devexit sgi_indy_panel_remove(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct sgipanel *bdev = dev_get_drvdata(dev);
+
+ bdev->shutting_down = 1;
+ input_unregister_device(bdev->input);
+ free_irq(SGI_PANEL_IRQ, bdev);
+ del_timer_sync(bdev->timer);
+ kfree(bdev);
+ dev_set_drvdata(dev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver sgi_indy_panel_driver = {
+ .probe = sgi_indy_panel_probe,
+ .remove = __devexit_p(sgi_indy_panel_remove),
+ .driver = {
+ .name = "sgipanel",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init sgi_indy_panel_init(void)
+{
+ return platform_driver_register(&sgi_indy_panel_driver);
+}
+
+static void __exit sgi_indy_panel_exit(void)
+{
+ platform_driver_unregister(&sgi_indy_panel_driver);
+}
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Dmitri Vorobiev <dmitri.vorobiev@xxxxxxxxx");
+MODULE_ALIAS("platform:sgipanel");
+MODULE_DESCRIPTION("SGI front panel driver");
+module_init(sgi_indy_panel_init);
+module_exit(sgi_indy_panel_exit);
--
1.5.4.3
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