0001
0002
0003
0004
0005
0006
0007 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0008
0009 #include <linux/kernel.h>
0010 #include <linux/module.h>
0011 #include <linux/init.h>
0012 #include <linux/leds.h>
0013 #include <linux/io.h>
0014 #include <linux/platform_device.h>
0015 #include <linux/slab.h>
0016
0017 #include <asm/fhc.h>
0018 #include <asm/upa.h>
0019
0020 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
0021 MODULE_DESCRIPTION("Sun Fire LED driver");
0022 MODULE_LICENSE("GPL");
0023
0024 struct sunfire_led {
0025 struct led_classdev led_cdev;
0026 void __iomem *reg;
0027 };
0028 #define to_sunfire_led(d) container_of(d, struct sunfire_led, led_cdev)
0029
0030 static void __clockboard_set(struct led_classdev *led_cdev,
0031 enum led_brightness led_val, u8 bit)
0032 {
0033 struct sunfire_led *p = to_sunfire_led(led_cdev);
0034 u8 reg = upa_readb(p->reg);
0035
0036 switch (bit) {
0037 case CLOCK_CTRL_LLED:
0038 if (led_val)
0039 reg &= ~bit;
0040 else
0041 reg |= bit;
0042 break;
0043
0044 default:
0045 if (led_val)
0046 reg |= bit;
0047 else
0048 reg &= ~bit;
0049 break;
0050 }
0051 upa_writeb(reg, p->reg);
0052 }
0053
0054 static void clockboard_left_set(struct led_classdev *led_cdev,
0055 enum led_brightness led_val)
0056 {
0057 __clockboard_set(led_cdev, led_val, CLOCK_CTRL_LLED);
0058 }
0059
0060 static void clockboard_middle_set(struct led_classdev *led_cdev,
0061 enum led_brightness led_val)
0062 {
0063 __clockboard_set(led_cdev, led_val, CLOCK_CTRL_MLED);
0064 }
0065
0066 static void clockboard_right_set(struct led_classdev *led_cdev,
0067 enum led_brightness led_val)
0068 {
0069 __clockboard_set(led_cdev, led_val, CLOCK_CTRL_RLED);
0070 }
0071
0072 static void __fhc_set(struct led_classdev *led_cdev,
0073 enum led_brightness led_val, u32 bit)
0074 {
0075 struct sunfire_led *p = to_sunfire_led(led_cdev);
0076 u32 reg = upa_readl(p->reg);
0077
0078 switch (bit) {
0079 case FHC_CONTROL_LLED:
0080 if (led_val)
0081 reg &= ~bit;
0082 else
0083 reg |= bit;
0084 break;
0085
0086 default:
0087 if (led_val)
0088 reg |= bit;
0089 else
0090 reg &= ~bit;
0091 break;
0092 }
0093 upa_writel(reg, p->reg);
0094 }
0095
0096 static void fhc_left_set(struct led_classdev *led_cdev,
0097 enum led_brightness led_val)
0098 {
0099 __fhc_set(led_cdev, led_val, FHC_CONTROL_LLED);
0100 }
0101
0102 static void fhc_middle_set(struct led_classdev *led_cdev,
0103 enum led_brightness led_val)
0104 {
0105 __fhc_set(led_cdev, led_val, FHC_CONTROL_MLED);
0106 }
0107
0108 static void fhc_right_set(struct led_classdev *led_cdev,
0109 enum led_brightness led_val)
0110 {
0111 __fhc_set(led_cdev, led_val, FHC_CONTROL_RLED);
0112 }
0113
0114 typedef void (*set_handler)(struct led_classdev *, enum led_brightness);
0115 struct led_type {
0116 const char *name;
0117 set_handler handler;
0118 const char *default_trigger;
0119 };
0120
0121 #define NUM_LEDS_PER_BOARD 3
0122 struct sunfire_drvdata {
0123 struct sunfire_led leds[NUM_LEDS_PER_BOARD];
0124 };
0125
0126 static int sunfire_led_generic_probe(struct platform_device *pdev,
0127 struct led_type *types)
0128 {
0129 struct sunfire_drvdata *p;
0130 int i, err;
0131
0132 if (pdev->num_resources != 1) {
0133 dev_err(&pdev->dev, "Wrong number of resources %d, should be 1\n",
0134 pdev->num_resources);
0135 return -EINVAL;
0136 }
0137
0138 p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
0139 if (!p)
0140 return -ENOMEM;
0141
0142 for (i = 0; i < NUM_LEDS_PER_BOARD; i++) {
0143 struct led_classdev *lp = &p->leds[i].led_cdev;
0144
0145 p->leds[i].reg = (void __iomem *) pdev->resource[0].start;
0146 lp->name = types[i].name;
0147 lp->brightness = LED_FULL;
0148 lp->brightness_set = types[i].handler;
0149 lp->default_trigger = types[i].default_trigger;
0150
0151 err = led_classdev_register(&pdev->dev, lp);
0152 if (err) {
0153 dev_err(&pdev->dev, "Could not register %s LED\n",
0154 lp->name);
0155 for (i--; i >= 0; i--)
0156 led_classdev_unregister(&p->leds[i].led_cdev);
0157 return err;
0158 }
0159 }
0160
0161 platform_set_drvdata(pdev, p);
0162
0163 return 0;
0164 }
0165
0166 static int sunfire_led_generic_remove(struct platform_device *pdev)
0167 {
0168 struct sunfire_drvdata *p = platform_get_drvdata(pdev);
0169 int i;
0170
0171 for (i = 0; i < NUM_LEDS_PER_BOARD; i++)
0172 led_classdev_unregister(&p->leds[i].led_cdev);
0173
0174 return 0;
0175 }
0176
0177 static struct led_type clockboard_led_types[NUM_LEDS_PER_BOARD] = {
0178 {
0179 .name = "clockboard-left",
0180 .handler = clockboard_left_set,
0181 },
0182 {
0183 .name = "clockboard-middle",
0184 .handler = clockboard_middle_set,
0185 },
0186 {
0187 .name = "clockboard-right",
0188 .handler = clockboard_right_set,
0189 .default_trigger = "heartbeat",
0190 },
0191 };
0192
0193 static int sunfire_clockboard_led_probe(struct platform_device *pdev)
0194 {
0195 return sunfire_led_generic_probe(pdev, clockboard_led_types);
0196 }
0197
0198 static struct led_type fhc_led_types[NUM_LEDS_PER_BOARD] = {
0199 {
0200 .name = "fhc-left",
0201 .handler = fhc_left_set,
0202 },
0203 {
0204 .name = "fhc-middle",
0205 .handler = fhc_middle_set,
0206 },
0207 {
0208 .name = "fhc-right",
0209 .handler = fhc_right_set,
0210 .default_trigger = "heartbeat",
0211 },
0212 };
0213
0214 static int sunfire_fhc_led_probe(struct platform_device *pdev)
0215 {
0216 return sunfire_led_generic_probe(pdev, fhc_led_types);
0217 }
0218
0219 MODULE_ALIAS("platform:sunfire-clockboard-leds");
0220 MODULE_ALIAS("platform:sunfire-fhc-leds");
0221
0222 static struct platform_driver sunfire_clockboard_led_driver = {
0223 .probe = sunfire_clockboard_led_probe,
0224 .remove = sunfire_led_generic_remove,
0225 .driver = {
0226 .name = "sunfire-clockboard-leds",
0227 },
0228 };
0229
0230 static struct platform_driver sunfire_fhc_led_driver = {
0231 .probe = sunfire_fhc_led_probe,
0232 .remove = sunfire_led_generic_remove,
0233 .driver = {
0234 .name = "sunfire-fhc-leds",
0235 },
0236 };
0237
0238 static struct platform_driver * const drivers[] = {
0239 &sunfire_clockboard_led_driver,
0240 &sunfire_fhc_led_driver,
0241 };
0242
0243 static int __init sunfire_leds_init(void)
0244 {
0245 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
0246 }
0247
0248 static void __exit sunfire_leds_exit(void)
0249 {
0250 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
0251 }
0252
0253 module_init(sunfire_leds_init);
0254 module_exit(sunfire_leds_exit);
