leds: Add driver for Sunfire UltraSPARC server LEDs.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 273 insertions, 0 deletions

diff --git a/drivers/leds/leds-sunfire.c b/drivers/leds/leds-sunfire.c
new file mode 100644
index 000000000000..6b008f0c3f62
--- /dev/null
+++ b/drivers/leds/leds-sunfire.c
@@ -0,0 +1,273 @@
+/* leds-sunfire.c: SUNW,Ultra-Enterprise LED driver.
+ *
+ * Copyright (C) 2008 David S. Miller <davem@davemloft.net>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/leds.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include <asm/fhc.h>
+#include <asm/upa.h>
+
+#define DRIVER_NAME     "leds-sunfire"
+#define PFX             DRIVER_NAME ": "
+
+MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
+MODULE_DESCRIPTION("Sun Fire LED driver");
+MODULE_LICENSE("GPL");
+
+struct sunfire_led {
+        struct led_classdev     led_cdev;
+        void __iomem            *reg;
+};
+#define to_sunfire_led(d) container_of(d, struct sunfire_led, led_cdev)
+
+static void __clockboard_set(struct led_classdev *led_cdev,
+                             enum led_brightness led_val, u8 bit)
+{
+        struct sunfire_led *p = to_sunfire_led(led_cdev);
+        u8 reg = upa_readb(p->reg);
+
+        switch (bit) {
+        case CLOCK_CTRL_LLED:
+                if (led_val)
+                        reg &= ~bit;
+                else
+                        reg |= bit;
+                break;
+
+        default:
+                if (led_val)
+                        reg |= bit;
+                else
+                        reg &= ~bit;
+                break;
+        }
+        upa_writeb(reg, p->reg);
+}
+
+static void clockboard_left_set(struct led_classdev *led_cdev,
+                                enum led_brightness led_val)
+{
+        __clockboard_set(led_cdev, led_val, CLOCK_CTRL_LLED);
+}
+
+static void clockboard_middle_set(struct led_classdev *led_cdev,
+                                  enum led_brightness led_val)
+{
+        __clockboard_set(led_cdev, led_val, CLOCK_CTRL_MLED);
+}
+
+static void clockboard_right_set(struct led_classdev *led_cdev,
+                                 enum led_brightness led_val)
+{
+        __clockboard_set(led_cdev, led_val, CLOCK_CTRL_RLED);
+}
+
+static void __fhc_set(struct led_classdev *led_cdev,
+                             enum led_brightness led_val, u32 bit)
+{
+        struct sunfire_led *p = to_sunfire_led(led_cdev);
+        u32 reg = upa_readl(p->reg);
+
+        switch (bit) {
+        case FHC_CONTROL_LLED:
+                if (led_val)
+                        reg &= ~bit;
+                else
+                        reg |= bit;
+                break;
+
+        default:
+                if (led_val)
+                        reg |= bit;
+                else
+                        reg &= ~bit;
+                break;
+        }
+        upa_writel(reg, p->reg);
+}
+
+static void fhc_left_set(struct led_classdev *led_cdev,
+                         enum led_brightness led_val)
+{
+        __fhc_set(led_cdev, led_val, FHC_CONTROL_LLED);
+}
+
+static void fhc_middle_set(struct led_classdev *led_cdev,
+                           enum led_brightness led_val)
+{
+        __fhc_set(led_cdev, led_val, FHC_CONTROL_MLED);
+}
+
+static void fhc_right_set(struct led_classdev *led_cdev,
+                          enum led_brightness led_val)
+{
+        __fhc_set(led_cdev, led_val, FHC_CONTROL_RLED);
+}
+
+typedef void (*set_handler)(struct led_classdev *, enum led_brightness);
+struct led_type {
+        const char      *name;
+        set_handler     handler;
+        const char      *default_trigger;
+};
+
+#define NUM_LEDS_PER_BOARD      3
+struct sunfire_drvdata {
+        struct sunfire_led      leds[NUM_LEDS_PER_BOARD];
+};
+
+static int __devinit sunfire_led_generic_probe(struct platform_device *pdev,
+                                               struct led_type *types)
+{
+        struct sunfire_drvdata *p;
+        int i, err = -EINVAL;
+
+        if (pdev->num_resources != 1) {
+                printk(KERN_ERR PFX "Wrong number of resources %d, should be 1\n",
+                       pdev->num_resources);
+                goto out;
+        }
+
+        p = kzalloc(sizeof(*p), GFP_KERNEL);
+        if (!p) {
+                printk(KERN_ERR PFX "Could not allocate struct sunfire_drvdata\n");
+                goto out;
+        }
+
+        for (i = 0; i < NUM_LEDS_PER_BOARD; i++) {
+                struct led_classdev *lp = &p->leds[i].led_cdev;
+
+                p->leds[i].reg = (void __iomem *) pdev->resource[0].start;
+                lp->name = types[i].name;
+                lp->brightness = LED_FULL;
+                lp->brightness_set = types[i].handler;
+                lp->default_trigger = types[i].default_trigger;
+
+                err = led_classdev_register(&pdev->dev, lp);
+                if (err) {
+                        printk(KERN_ERR PFX "Could not register %s LED\n",
+                               lp->name);
+                        goto out_unregister_led_cdevs;
+                }
+        }
+
+        dev_set_drvdata(&pdev->dev, p);
+
+        err = 0;
+out:
+        return err;
+
+out_unregister_led_cdevs:
+        for (i--; i >= 0; i--)
+                led_classdev_unregister(&p->leds[i].led_cdev);
+        goto out;
+}
+
+static int __devexit sunfire_led_generic_remove(struct platform_device *pdev)
+{
+        struct sunfire_drvdata *p = dev_get_drvdata(&pdev->dev);
+        int i;
+
+        for (i = 0; i < NUM_LEDS_PER_BOARD; i++)
+                led_classdev_unregister(&p->leds[i].led_cdev);
+
+        kfree(p);
+
+        return 0;
+}
+
+static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = {
+        {
+                .name           = "clockboard-left",
+                .handler        = clockboard_left_set,
+        },
+        {
+                .name           = "clockboard-middle",
+                .handler        = clockboard_middle_set,
+        },
+        {
+                .name           = "clockboard-right",
+                .handler        = clockboard_right_set,
+                .default_trigger= "heartbeat",
+        },
+};
+
+static int __devinit sunfire_clockboard_led_probe(struct platform_device *pdev)
+{
+        return sunfire_led_generic_probe(pdev, clockboard_led_types);
+}
+
+static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = {
+        {
+                .name           = "fhc-left",
+                .handler        = fhc_left_set,
+        },
+        {
+                .name           = "fhc-middle",
+                .handler        = fhc_middle_set,
+        },
+        {
+                .name           = "fhc-right",
+                .handler        = fhc_right_set,
+                .default_trigger= "heartbeat",
+        },
+};
+
+static int __devinit sunfire_fhc_led_probe(struct platform_device *pdev)
+{
+        return sunfire_led_generic_probe(pdev, fhc_led_types);
+}
+
+MODULE_ALIAS("platform:sunfire-clockboard-leds");
+MODULE_ALIAS("platform:sunfire-fhc-leds");
+
+static struct platform_driver sunfire_clockboard_led_driver = {
+        .probe          = sunfire_clockboard_led_probe,
+        .remove         = __devexit_p(sunfire_led_generic_remove),
+        .driver         = {
+                .name   = "sunfire-clockboard-leds",
+                .owner  = THIS_MODULE,
+        },
+};
+
+static struct platform_driver sunfire_fhc_led_driver = {
+        .probe          = sunfire_fhc_led_probe,
+        .remove         = __devexit_p(sunfire_led_generic_remove),
+        .driver         = {
+                .name   = "sunfire-fhc-leds",
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init sunfire_leds_init(void)
+{
+        int err = platform_driver_register(&sunfire_clockboard_led_driver);
+
+        if (err) {
+                printk(KERN_ERR PFX "Could not register clock board LED driver\n");
+                return err;
+        }
+
+        err = platform_driver_register(&sunfire_fhc_led_driver);
+        if (err) {
+                printk(KERN_ERR PFX "Could not register FHC LED driver\n");
+                platform_driver_unregister(&sunfire_clockboard_led_driver);
+        }
+
+        return err;
+}
+
+static void __exit sunfire_leds_exit(void)
+{
+        platform_driver_unregister(&sunfire_clockboard_led_driver);
+        platform_driver_unregister(&sunfire_fhc_led_driver);
+}
+
+module_init(sunfire_leds_init);
+module_exit(sunfire_leds_exit);