diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nv50_gpio.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nv50_gpio.c | 198 |
1 files changed, 193 insertions, 5 deletions
diff --git a/drivers/gpu/drm/nouveau/nv50_gpio.c b/drivers/gpu/drm/nouveau/nv50_gpio.c index b2fab2bf3d6..6b149c0cc06 100644 --- a/drivers/gpu/drm/nouveau/nv50_gpio.c +++ b/drivers/gpu/drm/nouveau/nv50_gpio.c @@ -26,6 +26,28 @@ #include "nouveau_drv.h" #include "nouveau_hw.h" +#include "nv50_display.h" + +static void nv50_gpio_isr(struct drm_device *dev); +static void nv50_gpio_isr_bh(struct work_struct *work); + +struct nv50_gpio_priv { + struct list_head handlers; + spinlock_t lock; +}; + +struct nv50_gpio_handler { + struct drm_device *dev; + struct list_head head; + struct work_struct work; + bool inhibit; + + struct dcb_gpio_entry *gpio; + + void (*handler)(void *data, int state); + void *data; +}; + static int nv50_gpio_location(struct dcb_gpio_entry *gpio, uint32_t *reg, uint32_t *shift) { @@ -75,29 +97,123 @@ nv50_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state) return 0; } +int +nv50_gpio_irq_register(struct drm_device *dev, enum dcb_gpio_tag tag, + void (*handler)(void *, int), void *data) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; + struct nv50_gpio_priv *priv = pgpio->priv; + struct nv50_gpio_handler *gpioh; + struct dcb_gpio_entry *gpio; + unsigned long flags; + + gpio = nouveau_bios_gpio_entry(dev, tag); + if (!gpio) + return -ENOENT; + + gpioh = kzalloc(sizeof(*gpioh), GFP_KERNEL); + if (!gpioh) + return -ENOMEM; + + INIT_WORK(&gpioh->work, nv50_gpio_isr_bh); + gpioh->dev = dev; + gpioh->gpio = gpio; + gpioh->handler = handler; + gpioh->data = data; + + spin_lock_irqsave(&priv->lock, flags); + list_add(&gpioh->head, &priv->handlers); + spin_unlock_irqrestore(&priv->lock, flags); + return 0; +} + void -nv50_gpio_irq_enable(struct drm_device *dev, enum dcb_gpio_tag tag, bool on) +nv50_gpio_irq_unregister(struct drm_device *dev, enum dcb_gpio_tag tag, + void (*handler)(void *, int), void *data) { + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; + struct nv50_gpio_priv *priv = pgpio->priv; + struct nv50_gpio_handler *gpioh, *tmp; struct dcb_gpio_entry *gpio; - u32 reg, mask; + unsigned long flags; gpio = nouveau_bios_gpio_entry(dev, tag); - if (!gpio) { - NV_ERROR(dev, "gpio tag 0x%02x not found\n", tag); + if (!gpio) return; + + spin_lock_irqsave(&priv->lock, flags); + list_for_each_entry_safe(gpioh, tmp, &priv->handlers, head) { + if (gpioh->gpio != gpio || + gpioh->handler != handler || + gpioh->data != data) + continue; + list_del(&gpioh->head); + kfree(gpioh); } + spin_unlock_irqrestore(&priv->lock, flags); +} + +bool +nv50_gpio_irq_enable(struct drm_device *dev, enum dcb_gpio_tag tag, bool on) +{ + struct dcb_gpio_entry *gpio; + u32 reg, mask; + + gpio = nouveau_bios_gpio_entry(dev, tag); + if (!gpio) + return false; reg = gpio->line < 16 ? 0xe050 : 0xe070; mask = 0x00010001 << (gpio->line & 0xf); nv_wr32(dev, reg + 4, mask); - nv_mask(dev, reg + 0, mask, on ? mask : 0); + reg = nv_mask(dev, reg + 0, mask, on ? mask : 0); + return (reg & mask) == mask; +} + +static int +nv50_gpio_create(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; + struct nv50_gpio_priv *priv; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + INIT_LIST_HEAD(&priv->handlers); + spin_lock_init(&priv->lock); + pgpio->priv = priv; + return 0; +} + +static void +nv50_gpio_destroy(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; + + kfree(pgpio->priv); + pgpio->priv = NULL; } int nv50_gpio_init(struct drm_device *dev) { struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; + struct nv50_gpio_priv *priv; + int ret; + + if (!pgpio->priv) { + ret = nv50_gpio_create(dev); + if (ret) + return ret; + } + priv = pgpio->priv; /* disable, and ack any pending gpio interrupts */ nv_wr32(dev, 0xe050, 0x00000000); @@ -107,5 +223,77 @@ nv50_gpio_init(struct drm_device *dev) nv_wr32(dev, 0xe074, 0xffffffff); } + nouveau_irq_register(dev, 21, nv50_gpio_isr); return 0; } + +void +nv50_gpio_fini(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + + nv_wr32(dev, 0xe050, 0x00000000); + if (dev_priv->chipset >= 0x90) + nv_wr32(dev, 0xe070, 0x00000000); + nouveau_irq_unregister(dev, 21); + + nv50_gpio_destroy(dev); +} + +static void +nv50_gpio_isr_bh(struct work_struct *work) +{ + struct nv50_gpio_handler *gpioh = + container_of(work, struct nv50_gpio_handler, work); + struct drm_nouveau_private *dev_priv = gpioh->dev->dev_private; + struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; + struct nv50_gpio_priv *priv = pgpio->priv; + unsigned long flags; + int state; + + state = pgpio->get(gpioh->dev, gpioh->gpio->tag); + if (state < 0) + return; + + gpioh->handler(gpioh->data, state); + + spin_lock_irqsave(&priv->lock, flags); + gpioh->inhibit = false; + spin_unlock_irqrestore(&priv->lock, flags); +} + +static void +nv50_gpio_isr(struct drm_device *dev) +{ + struct drm_nouveau_private *dev_priv = dev->dev_private; + struct nouveau_gpio_engine *pgpio = &dev_priv->engine.gpio; + struct nv50_gpio_priv *priv = pgpio->priv; + struct nv50_gpio_handler *gpioh; + u32 intr0, intr1 = 0; + u32 hi, lo, ch; + + intr0 = nv_rd32(dev, 0xe054) & nv_rd32(dev, 0xe050); + if (dev_priv->chipset >= 0x90) + intr1 = nv_rd32(dev, 0xe074) & nv_rd32(dev, 0xe070); + + hi = (intr0 & 0x0000ffff) | (intr1 << 16); + lo = (intr0 >> 16) | (intr1 & 0xffff0000); + ch = hi | lo; + + nv_wr32(dev, 0xe054, intr0); + if (dev_priv->chipset >= 0x90) + nv_wr32(dev, 0xe074, intr1); + + spin_lock(&priv->lock); + list_for_each_entry(gpioh, &priv->handlers, head) { + if (!(ch & (1 << gpioh->gpio->line))) + continue; + + if (gpioh->inhibit) + continue; + gpioh->inhibit = true; + + queue_work(dev_priv->wq, &gpioh->work); + } + spin_unlock(&priv->lock); +} |