diff options
Diffstat (limited to 'arch/arm/mach-bcmring/include/mach/dma.h')
| -rw-r--r-- | arch/arm/mach-bcmring/include/mach/dma.h | 630 |
1 files changed, 0 insertions, 630 deletions
diff --git a/arch/arm/mach-bcmring/include/mach/dma.h b/arch/arm/mach-bcmring/include/mach/dma.h deleted file mode 100644 index 7254378..0000000 --- a/arch/arm/mach-bcmring/include/mach/dma.h +++ /dev/null @@ -1,630 +0,0 @@ -/***************************************************************************** -* Copyright 2004 - 2008 Broadcom Corporation. All rights reserved. -* -* Unless you and Broadcom execute a separate written software license -* agreement governing use of this software, this software is licensed to you -* under the terms of the GNU General Public License version 2, available at -* http://www.broadcom.com/licenses/GPLv2.php (the "GPL"). -* -* Notwithstanding the above, under no circumstances may you combine this -* software in any way with any other Broadcom software provided under a -* license other than the GPL, without Broadcom's express prior written -* consent. -*****************************************************************************/ - -/****************************************************************************/ -/** -* @file dma.h -* -* @brief API definitions for the linux DMA interface. -*/ -/****************************************************************************/ - -#if !defined(ASM_ARM_ARCH_BCMRING_DMA_H) -#define ASM_ARM_ARCH_BCMRING_DMA_H - -/* ---- Include Files ---------------------------------------------------- */ - -#include <linux/kernel.h> -#include <linux/semaphore.h> -#include <csp/dmacHw.h> -#include <mach/timer.h> - -/* ---- Constants and Types ---------------------------------------------- */ - -/* If DMA_DEBUG_TRACK_RESERVATION is set to a non-zero value, then the filename */ -/* and line number of the reservation request will be recorded in the channel table */ - -#define DMA_DEBUG_TRACK_RESERVATION 1 - -#define DMA_NUM_CONTROLLERS 2 -#define DMA_NUM_CHANNELS 8 /* per controller */ - -typedef enum { - DMA_DEVICE_MEM_TO_MEM, /* For memory to memory transfers */ - DMA_DEVICE_I2S0_DEV_TO_MEM, - DMA_DEVICE_I2S0_MEM_TO_DEV, - DMA_DEVICE_I2S1_DEV_TO_MEM, - DMA_DEVICE_I2S1_MEM_TO_DEV, - DMA_DEVICE_APM_CODEC_A_DEV_TO_MEM, - DMA_DEVICE_APM_CODEC_A_MEM_TO_DEV, - DMA_DEVICE_APM_CODEC_B_DEV_TO_MEM, - DMA_DEVICE_APM_CODEC_B_MEM_TO_DEV, - DMA_DEVICE_APM_CODEC_C_DEV_TO_MEM, /* Additional mic input for beam-forming */ - DMA_DEVICE_APM_PCM0_DEV_TO_MEM, - DMA_DEVICE_APM_PCM0_MEM_TO_DEV, - DMA_DEVICE_APM_PCM1_DEV_TO_MEM, - DMA_DEVICE_APM_PCM1_MEM_TO_DEV, - DMA_DEVICE_SPUM_DEV_TO_MEM, - DMA_DEVICE_SPUM_MEM_TO_DEV, - DMA_DEVICE_SPIH_DEV_TO_MEM, - DMA_DEVICE_SPIH_MEM_TO_DEV, - DMA_DEVICE_UART_A_DEV_TO_MEM, - DMA_DEVICE_UART_A_MEM_TO_DEV, - DMA_DEVICE_UART_B_DEV_TO_MEM, - DMA_DEVICE_UART_B_MEM_TO_DEV, - DMA_DEVICE_PIF_MEM_TO_DEV, - DMA_DEVICE_PIF_DEV_TO_MEM, - DMA_DEVICE_ESW_DEV_TO_MEM, - DMA_DEVICE_ESW_MEM_TO_DEV, - DMA_DEVICE_VPM_MEM_TO_MEM, - DMA_DEVICE_CLCD_MEM_TO_MEM, - DMA_DEVICE_NAND_MEM_TO_MEM, - DMA_DEVICE_MEM_TO_VRAM, - DMA_DEVICE_VRAM_TO_MEM, - - /* Add new entries before this line. */ - - DMA_NUM_DEVICE_ENTRIES, - DMA_DEVICE_NONE = 0xff, /* Special value to indicate that no device is currently assigned. */ - -} DMA_Device_t; - -/**************************************************************************** -* -* The DMA_Handle_t is the primary object used by callers of the API. -* -*****************************************************************************/ - -#define DMA_INVALID_HANDLE ((DMA_Handle_t) -1) - -typedef int DMA_Handle_t; - -/**************************************************************************** -* -* The DMA_DescriptorRing_t contains a ring of descriptors which is used -* to point to regions of memory. -* -*****************************************************************************/ - -typedef struct { - void *virtAddr; /* Virtual Address of the descriptor ring */ - dma_addr_t physAddr; /* Physical address of the descriptor ring */ - int descriptorsAllocated; /* Number of descriptors allocated in the descriptor ring */ - size_t bytesAllocated; /* Number of bytes allocated in the descriptor ring */ - -} DMA_DescriptorRing_t; - -/**************************************************************************** -* -* The DMA_DeviceAttribute_t contains information which describes a -* particular DMA device (or peripheral). -* -* It is anticipated that the arrary of DMA_DeviceAttribute_t's will be -* statically initialized. -* -*****************************************************************************/ - -/* The device handler is called whenever a DMA operation completes. The reaon */ -/* for it to be called will be a bitmask with one or more of the following bits */ -/* set. */ - -#define DMA_HANDLER_REASON_BLOCK_COMPLETE dmacHw_INTERRUPT_STATUS_BLOCK -#define DMA_HANDLER_REASON_TRANSFER_COMPLETE dmacHw_INTERRUPT_STATUS_TRANS -#define DMA_HANDLER_REASON_ERROR dmacHw_INTERRUPT_STATUS_ERROR - -typedef void (*DMA_DeviceHandler_t) (DMA_Device_t dev, int reason, - void *userData); - -#define DMA_DEVICE_FLAG_ON_DMA0 0x00000001 -#define DMA_DEVICE_FLAG_ON_DMA1 0x00000002 -#define DMA_DEVICE_FLAG_PORT_PER_DMAC 0x00000004 /* If set, it means that the port used on DMAC0 is different from the port used on DMAC1 */ -#define DMA_DEVICE_FLAG_ALLOC_DMA1_FIRST 0x00000008 /* If set, allocate from DMA1 before allocating from DMA0 */ -#define DMA_DEVICE_FLAG_IS_DEDICATED 0x00000100 -#define DMA_DEVICE_FLAG_NO_ISR 0x00000200 -#define DMA_DEVICE_FLAG_ALLOW_LARGE_FIFO 0x00000400 -#define DMA_DEVICE_FLAG_IN_USE 0x00000800 /* If set, device is in use on a channel */ - -/* Note: Some DMA devices can be used from multiple DMA Controllers. The bitmask is used to */ -/* determine which DMA controllers a given device can be used from, and the interface */ -/* array determeines the actual interface number to use for a given controller. */ - -typedef struct { - uint32_t flags; /* Bitmask of DMA_DEVICE_FLAG_xxx constants */ - uint8_t dedicatedController; /* Controller number to use if DMA_DEVICE_FLAG_IS_DEDICATED is set. */ - uint8_t dedicatedChannel; /* Channel number to use if DMA_DEVICE_FLAG_IS_DEDICATED is set. */ - const char *name; /* Will show up in the /proc entry */ - - uint32_t dmacPort[DMA_NUM_CONTROLLERS]; /* Specifies the port number when DMA_DEVICE_FLAG_PORT_PER_DMAC flag is set */ - - dmacHw_CONFIG_t config; /* Configuration to use when DMA'ing using this device */ - - void *userData; /* Passed to the devHandler */ - DMA_DeviceHandler_t devHandler; /* Called when DMA operations finish. */ - - timer_tick_count_t transferStartTime; /* Time the current transfer was started */ - - /* The following statistical information will be collected and presented in a proc entry. */ - /* Note: With a contiuous bandwidth of 1 Gb/sec, it would take 584 years to overflow */ - /* a 64 bit counter. */ - - uint64_t numTransfers; /* Number of DMA transfers performed */ - uint64_t transferTicks; /* Total time spent doing DMA transfers (measured in timer_tick_count_t's) */ - uint64_t transferBytes; /* Total bytes transferred */ - uint32_t timesBlocked; /* Number of times a channel was unavailable */ - uint32_t numBytes; /* Last transfer size */ - - /* It's not possible to free memory which is allocated for the descriptors from within */ - /* the ISR. So make the presumption that a given device will tend to use the */ - /* same sized buffers over and over again, and we keep them around. */ - - DMA_DescriptorRing_t ring; /* Ring of descriptors allocated for this device */ - - /* We stash away some of the information from the previous transfer. If back-to-back */ - /* transfers are performed from the same buffer, then we don't have to keep re-initializing */ - /* the descriptor buffers. */ - - uint32_t prevNumBytes; - dma_addr_t prevSrcData; - dma_addr_t prevDstData; - -} DMA_DeviceAttribute_t; - -/**************************************************************************** -* -* DMA_Channel_t, DMA_Controller_t, and DMA_State_t are really internal -* data structures and don't belong in this header file, but are included -* merely for discussion. -* -* By the time this is implemented, these structures will be moved out into -* the appropriate C source file instead. -* -*****************************************************************************/ - -/**************************************************************************** -* -* The DMA_Channel_t contains state information about each DMA channel. Some -* of the channels are dedicated. Non-dedicated channels are shared -* amongst the other devices. -* -*****************************************************************************/ - -#define DMA_CHANNEL_FLAG_IN_USE 0x00000001 -#define DMA_CHANNEL_FLAG_IS_DEDICATED 0x00000002 -#define DMA_CHANNEL_FLAG_NO_ISR 0x00000004 -#define DMA_CHANNEL_FLAG_LARGE_FIFO 0x00000008 - -typedef struct { - uint32_t flags; /* bitmask of DMA_CHANNEL_FLAG_xxx constants */ - DMA_Device_t devType; /* Device this channel is currently reserved for */ - DMA_Device_t lastDevType; /* Device type that used this previously */ - char name[20]; /* Name passed onto request_irq */ - -#if (DMA_DEBUG_TRACK_RESERVATION) - const char *fileName; /* Place where channel reservation took place */ - int lineNum; /* Place where channel reservation took place */ -#endif - dmacHw_HANDLE_t dmacHwHandle; /* low level channel handle. */ - -} DMA_Channel_t; - -/**************************************************************************** -* -* The DMA_Controller_t contains state information about each DMA controller. -* -* The freeChannelQ is stored in the controller data structure rather than -* the channel data structure since several of the devices are accessible -* from multiple controllers, and there is no way to know which controller -* will become available first. -* -*****************************************************************************/ - -typedef struct { - DMA_Channel_t channel[DMA_NUM_CHANNELS]; - -} DMA_Controller_t; - -/**************************************************************************** -* -* The DMA_Global_t contains all of the global state information used by -* the DMA code. -* -* Callers which need to allocate a shared channel will be queued up -* on the freeChannelQ until a channel becomes available. -* -*****************************************************************************/ - -typedef struct { - struct semaphore lock; /* acquired when manipulating table entries */ - wait_queue_head_t freeChannelQ; - - DMA_Controller_t controller[DMA_NUM_CONTROLLERS]; - -} DMA_Global_t; - -/* ---- Variable Externs ------------------------------------------------- */ - -extern DMA_DeviceAttribute_t DMA_gDeviceAttribute[DMA_NUM_DEVICE_ENTRIES]; - -/* ---- Function Prototypes ---------------------------------------------- */ - -#if defined(__KERNEL__) - -/****************************************************************************/ -/** -* Initializes the DMA module. -* -* @return -* 0 - Success -* < 0 - Error -*/ -/****************************************************************************/ - -int dma_init(void); - -#if (DMA_DEBUG_TRACK_RESERVATION) -DMA_Handle_t dma_request_channel_dbg(DMA_Device_t dev, const char *fileName, - int lineNum); -#define dma_request_channel(dev) dma_request_channel_dbg(dev, __FILE__, __LINE__) -#else - -/****************************************************************************/ -/** -* Reserves a channel for use with @a dev. If the device is setup to use -* a shared channel, then this function will block until a free channel -* becomes available. -* -* @return -* >= 0 - A valid DMA Handle. -* -EBUSY - Device is currently being used. -* -ENODEV - Device handed in is invalid. -*/ -/****************************************************************************/ - -DMA_Handle_t dma_request_channel(DMA_Device_t dev /* Device to use with the allocated channel. */ - ); -#endif - -/****************************************************************************/ -/** -* Frees a previously allocated DMA Handle. -* -* @return -* 0 - DMA Handle was released successfully. -* -EINVAL - Invalid DMA handle -*/ -/****************************************************************************/ - -int dma_free_channel(DMA_Handle_t channel /* DMA handle. */ - ); - -/****************************************************************************/ -/** -* Determines if a given device has been configured as using a shared -* channel. -* -* @return boolean -* 0 Device uses a dedicated channel -* non-zero Device uses a shared channel -*/ -/****************************************************************************/ - -int dma_device_is_channel_shared(DMA_Device_t dev /* Device to check. */ - ); - -/****************************************************************************/ -/** -* Allocates memory to hold a descriptor ring. The descriptor ring then -* needs to be populated by making one or more calls to -* dna_add_descriptors. -* -* The returned descriptor ring will be automatically initialized. -* -* @return -* 0 Descriptor ring was allocated successfully -* -ENOMEM Unable to allocate memory for the desired number of descriptors. -*/ -/****************************************************************************/ - -int dma_alloc_descriptor_ring(DMA_DescriptorRing_t *ring, /* Descriptor ring to populate */ - int numDescriptors /* Number of descriptors that need to be allocated. */ - ); - -/****************************************************************************/ -/** -* Releases the memory which was previously allocated for a descriptor ring. -*/ -/****************************************************************************/ - -void dma_free_descriptor_ring(DMA_DescriptorRing_t *ring /* Descriptor to release */ - ); - -/****************************************************************************/ -/** -* Initializes a descriptor ring, so that descriptors can be added to it. -* Once a descriptor ring has been allocated, it may be reinitialized for -* use with additional/different regions of memory. -* -* Note that if 7 descriptors are allocated, it's perfectly acceptable to -* initialize the ring with a smaller number of descriptors. The amount -* of memory allocated for the descriptor ring will not be reduced, and -* the descriptor ring may be reinitialized later -* -* @return -* 0 Descriptor ring was initialized successfully -* -ENOMEM The descriptor which was passed in has insufficient space -* to hold the desired number of descriptors. -*/ -/****************************************************************************/ - -int dma_init_descriptor_ring(DMA_DescriptorRing_t *ring, /* Descriptor ring to initialize */ - int numDescriptors /* Number of descriptors to initialize. */ - ); - -/****************************************************************************/ -/** -* Determines the number of descriptors which would be required for a -* transfer of the indicated memory region. -* -* This function also needs to know which DMA device this transfer will -* be destined for, so that the appropriate DMA configuration can be retrieved. -* DMA parameters such as transfer width, and whether this is a memory-to-memory -* or memory-to-peripheral, etc can all affect the actual number of descriptors -* required. -* -* @return -* > 0 Returns the number of descriptors required for the indicated transfer -* -EINVAL Invalid device type for this kind of transfer -* (i.e. the device is _MEM_TO_DEV and not _DEV_TO_MEM) -* -ENOMEM Memory exhausted -*/ -/****************************************************************************/ - -int dma_calculate_descriptor_count(DMA_Device_t device, /* DMA Device that this will be associated with */ - dma_addr_t srcData, /* Place to get data to write to device */ - dma_addr_t dstData, /* Pointer to device data address */ - size_t numBytes /* Number of bytes to transfer to the device */ - ); - -/****************************************************************************/ -/** -* Adds a region of memory to the descriptor ring. Note that it may take -* multiple descriptors for each region of memory. It is the callers -* responsibility to allocate a sufficiently large descriptor ring. -* -* @return -* 0 Descriptors were added successfully -* -EINVAL Invalid device type for this kind of transfer -* (i.e. the device is _MEM_TO_DEV and not _DEV_TO_MEM) -* -ENOMEM Memory exhausted -*/ -/****************************************************************************/ - -int dma_add_descriptors(DMA_DescriptorRing_t *ring, /* Descriptor ring to add descriptors to */ - DMA_Device_t device, /* DMA Device that descriptors are for */ - dma_addr_t srcData, /* Place to get data (memory or device) */ - dma_addr_t dstData, /* Place to put data (memory or device) */ - size_t numBytes /* Number of bytes to transfer to the device */ - ); - -/****************************************************************************/ -/** -* Sets the descriptor ring associated with a device. -* -* Once set, the descriptor ring will be associated with the device, even -* across channel request/free calls. Passing in a NULL descriptor ring -* will release any descriptor ring currently associated with the device. -* -* Note: If you call dma_transfer, or one of the other dma_alloc_ functions -* the descriptor ring may be released and reallocated. -* -* Note: This function will release the descriptor memory for any current -* descriptor ring associated with this device. -*/ -/****************************************************************************/ - -int dma_set_device_descriptor_ring(DMA_Device_t device, /* Device to update the descriptor ring for. */ - DMA_DescriptorRing_t *ring /* Descriptor ring to add descriptors to */ - ); - -/****************************************************************************/ -/** -* Retrieves the descriptor ring associated with a device. -*/ -/****************************************************************************/ - -int dma_get_device_descriptor_ring(DMA_Device_t device, /* Device to retrieve the descriptor ring for. */ - DMA_DescriptorRing_t *ring /* Place to store retrieved ring */ - ); - -/****************************************************************************/ -/** -* Allocates buffers for the descriptors. This is normally done automatically -* but needs to be done explicitly when initiating a dma from interrupt -* context. -* -* @return -* 0 Descriptors were allocated successfully -* -EINVAL Invalid device type for this kind of transfer -* (i.e. the device is _MEM_TO_DEV and not _DEV_TO_MEM) -* -ENOMEM Memory exhausted -*/ -/****************************************************************************/ - -int dma_alloc_descriptors(DMA_Handle_t handle, /* DMA Handle */ - dmacHw_TRANSFER_TYPE_e transferType, /* Type of transfer being performed */ - dma_addr_t srcData, /* Place to get data to write to device */ - dma_addr_t dstData, /* Pointer to device data address */ - size_t numBytes /* Number of bytes to transfer to the device */ - ); - -/****************************************************************************/ -/** -* Allocates and sets up descriptors for a double buffered circular buffer. -* -* This is primarily intended to be used for things like the ingress samples -* from a microphone. -* -* @return -* > 0 Number of descriptors actually allocated. -* -EINVAL Invalid device type for this kind of transfer -* (i.e. the device is _MEM_TO_DEV and not _DEV_TO_MEM) -* -ENOMEM Memory exhausted -*/ -/****************************************************************************/ - -int dma_alloc_double_dst_descriptors(DMA_Handle_t handle, /* DMA Handle */ - dma_addr_t srcData, /* Physical address of source data */ - dma_addr_t dstData1, /* Physical address of first destination buffer */ - dma_addr_t dstData2, /* Physical address of second destination buffer */ - size_t numBytes /* Number of bytes in each destination buffer */ - ); - -/****************************************************************************/ -/** -* Initiates a transfer when the descriptors have already been setup. -* -* This is a special case, and normally, the dma_transfer_xxx functions should -* be used. -* -* @return -* 0 Transfer was started successfully -* -ENODEV Invalid handle -*/ -/****************************************************************************/ - -int dma_start_transfer(DMA_Handle_t handle); - -/****************************************************************************/ -/** -* Stops a previously started DMA transfer. -* -* @return -* 0 Transfer was stopped successfully -* -ENODEV Invalid handle -*/ -/****************************************************************************/ - -int dma_stop_transfer(DMA_Handle_t handle); - -/****************************************************************************/ -/** -* Waits for a DMA to complete by polling. This function is only intended -* to be used for testing. Interrupts should be used for most DMA operations. -*/ -/****************************************************************************/ - -int dma_wait_transfer_done(DMA_Handle_t handle); - -/****************************************************************************/ -/** -* Initiates a DMA transfer -* -* @return -* 0 Transfer was started successfully -* -EINVAL Invalid device type for this kind of transfer -* (i.e. the device is _MEM_TO_DEV and not _DEV_TO_MEM) -*/ -/****************************************************************************/ - -int dma_transfer(DMA_Handle_t handle, /* DMA Handle */ - dmacHw_TRANSFER_TYPE_e transferType, /* Type of transfer being performed */ - dma_addr_t srcData, /* Place to get data to write to device */ - dma_addr_t dstData, /* Pointer to device data address */ - size_t numBytes /* Number of bytes to transfer to the device */ - ); - -/****************************************************************************/ -/** -* Initiates a transfer from memory to a device. -* -* @return -* 0 Transfer was started successfully -* -EINVAL Invalid device type for this kind of transfer -* (i.e. the device is _DEV_TO_MEM and not _MEM_TO_DEV) -*/ -/****************************************************************************/ - -static inline int dma_transfer_to_device(DMA_Handle_t handle, /* DMA Handle */ - dma_addr_t srcData, /* Place to get data to write to device (physical address) */ - dma_addr_t dstData, /* Pointer to device data address (physical address) */ - size_t numBytes /* Number of bytes to transfer to the device */ - ) { - return dma_transfer(handle, - dmacHw_TRANSFER_TYPE_MEM_TO_PERIPHERAL, - srcData, dstData, numBytes); -} - -/****************************************************************************/ -/** -* Initiates a transfer from a device to memory. -* -* @return -* 0 Transfer was started successfully -* -EINVAL Invalid device type for this kind of transfer -* (i.e. the device is _MEM_TO_DEV and not _DEV_TO_MEM) -*/ -/****************************************************************************/ - -static inline int dma_transfer_from_device(DMA_Handle_t handle, /* DMA Handle */ - dma_addr_t srcData, /* Pointer to the device data address (physical address) */ - dma_addr_t dstData, /* Place to store data retrieved from the device (physical address) */ - size_t numBytes /* Number of bytes to retrieve from the device */ - ) { - return dma_transfer(handle, - dmacHw_TRANSFER_TYPE_PERIPHERAL_TO_MEM, - srcData, dstData, numBytes); -} - -/****************************************************************************/ -/** -* Initiates a memory to memory transfer. -* -* @return -* 0 Transfer was started successfully -* -EINVAL Invalid device type for this kind of transfer -* (i.e. the device wasn't DMA_DEVICE_MEM_TO_MEM) -*/ -/****************************************************************************/ - -static inline int dma_transfer_mem_to_mem(DMA_Handle_t handle, /* DMA Handle */ - dma_addr_t srcData, /* Place to transfer data from (physical address) */ - dma_addr_t dstData, /* Place to transfer data to (physical address) */ - size_t numBytes /* Number of bytes to transfer */ - ) { - return dma_transfer(handle, - dmacHw_TRANSFER_TYPE_MEM_TO_MEM, - srcData, dstData, numBytes); -} - -/****************************************************************************/ -/** -* Set the callback function which will be called when a transfer completes. -* If a NULL callback function is set, then no callback will occur. -* -* @note @a devHandler will be called from IRQ context. -* -* @return -* 0 - Success -* -ENODEV - Device handed in is invalid. -*/ -/****************************************************************************/ - -int dma_set_device_handler(DMA_Device_t dev, /* Device to set the callback for. */ - DMA_DeviceHandler_t devHandler, /* Function to call when the DMA completes */ - void *userData /* Pointer which will be passed to devHandler. */ - ); - -#endif - -#endif /* ASM_ARM_ARCH_BCMRING_DMA_H */ |
