diff options
Diffstat (limited to 'include/linux/nvhost.h')
| -rw-r--r-- | include/linux/nvhost.h | 72 |
1 files changed, 65 insertions, 7 deletions
diff --git a/include/linux/nvhost.h b/include/linux/nvhost.h index a1d211de1ef1..6b3c9e366f30 100644 --- a/include/linux/nvhost.h +++ b/include/linux/nvhost.h @@ -28,17 +28,75 @@ struct nvhost_master; +#define NVHOST_MODULE_MAX_CLOCKS 3 +#define NVHOST_MODULE_MAX_POWERGATE_IDS 2 +#define NVHOST_MODULE_NO_POWERGATE_IDS .powergate_ids = {-1, -1} +#define NVHOST_DEFAULT_CLOCKGATE_DELAY .clockgate_delay = 25 + +struct nvhost_clock { + char *name; + long default_rate; +}; + +enum nvhost_device_powerstate_t { + NVHOST_POWER_STATE_DEINIT, + NVHOST_POWER_STATE_RUNNING, + NVHOST_POWER_STATE_CLOCKGATED, + NVHOST_POWER_STATE_POWERGATED +}; + struct nvhost_device { - const char *name; - struct device dev; - int id; - u32 num_resources; - struct resource *resource; + const char *name; /* Device name */ + struct device dev; /* Linux device struct */ + int id; /* Separates clients of same hw */ + u32 num_resources; /* Number of resources following */ + struct resource *resource; /* Resources (IOMEM in particular) */ + + struct nvhost_master *host; /* Access to host1x resources */ + u32 syncpts; /* Bitfield of sync points used */ + u32 waitbases; /* Bit field of wait bases */ + u32 modulemutexes; /* Bit field of module mutexes */ + u32 class; /* Device class */ + bool exclusive; /* True if only one user at a time */ + bool keepalive; /* Do not power gate when opened */ + bool waitbasesync; /* Force sync of wait bases */ + + int powergate_ids[NVHOST_MODULE_MAX_POWERGATE_IDS]; + bool can_powergate; /* True if module can be power gated */ + int clockgate_delay;/* Delay before clock gated */ + int powergate_delay;/* Delay before power gated */ + struct nvhost_clock clocks[NVHOST_MODULE_MAX_CLOCKS];/* Clock names */ + + struct delayed_work powerstate_down;/* Power state management */ + int num_clks; /* Number of clocks opened for dev */ + struct clk *clk[NVHOST_MODULE_MAX_CLOCKS]; + struct mutex lock; /* Power management lock */ + int powerstate; /* Current power state */ + int refcount; /* Number of tasks active */ + wait_queue_head_t idle_wq; /* Work queue for idle */ + struct list_head client_list; /* List of clients and rate requests */ + + struct nvhost_channel *channel; /* Channel assigned for the module */ - struct nvhost_master *host; + /* Preparing for power off. Used for context save. */ + int (*prepare_poweroff)(struct nvhost_device *dev); + /* Finalize power on. Can be used for context restore. */ + void (*finalize_poweron)(struct nvhost_device *dev); + /* Device is busy. */ + void (*busy)(struct nvhost_device *); + /* Device is idle. */ + void (*idle)(struct nvhost_device *); + /* Device is going to be suspended */ + void (*suspend)(struct nvhost_device *); + /* Device is initialized */ + void (*init)(struct nvhost_device *dev); + /* Device is de-initialized. */ + void (*deinit)(struct nvhost_device *dev); }; +/* Register device to nvhost bus */ extern int nvhost_device_register(struct nvhost_device *); +/* Deregister device from nvhost bus */ extern void nvhost_device_unregister(struct nvhost_device *); extern struct bus_type nvhost_bus_type; @@ -68,6 +126,6 @@ extern int nvhost_get_irq_byname(struct nvhost_device *, const char *); #define nvhost_get_drvdata(_dev) dev_get_drvdata(&(_dev)->dev) #define nvhost_set_drvdata(_dev, data) dev_set_drvdata(&(_dev)->dev, (data)) -int nvhost_bus_register(struct nvhost_master *host); +int nvhost_bus_add_host(struct nvhost_master *host); #endif |