diff options
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/pasemi_dma.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/include/asm-powerpc/pasemi_dma.h b/include/asm-powerpc/pasemi_dma.h index 8ef80d8bdec..b4526ff3a50 100644 --- a/include/asm-powerpc/pasemi_dma.h +++ b/include/asm-powerpc/pasemi_dma.h @@ -33,11 +33,27 @@ struct pasdma_status { * device. Use the normal PCI config access functions for them. */ enum { + PAS_DMA_CAP_TXCH = 0x44, /* Transmit Channel Info */ + PAS_DMA_CAP_RXCH = 0x48, /* Transmit Channel Info */ + PAS_DMA_CAP_IFI = 0x4c, /* Interface Info */ PAS_DMA_COM_TXCMD = 0x100, /* Transmit Command Register */ PAS_DMA_COM_TXSTA = 0x104, /* Transmit Status Register */ PAS_DMA_COM_RXCMD = 0x108, /* Receive Command Register */ PAS_DMA_COM_RXSTA = 0x10c, /* Receive Status Register */ }; + + +#define PAS_DMA_CAP_TXCH_TCHN_M 0x00ff0000 /* # of TX channels */ +#define PAS_DMA_CAP_TXCH_TCHN_S 16 + +#define PAS_DMA_CAP_RXCH_RCHN_M 0x00ff0000 /* # of RX channels */ +#define PAS_DMA_CAP_RXCH_RCHN_S 16 + +#define PAS_DMA_CAP_IFI_IOFF_M 0xff000000 /* Cfg reg for intf pointers */ +#define PAS_DMA_CAP_IFI_IOFF_S 24 +#define PAS_DMA_CAP_IFI_NIN_M 0x00ff0000 /* # of interfaces */ +#define PAS_DMA_CAP_IFI_NIN_S 16 + #define PAS_DMA_COM_TXCMD_EN 0x00000001 /* enable */ #define PAS_DMA_COM_TXSTA_ACT 0x00000001 /* active */ #define PAS_DMA_COM_RXCMD_EN 0x00000001 /* enable */ @@ -388,4 +404,64 @@ enum { CTRL_CMD_REG_M) + +/* Prototypes for the shared DMA functions in the platform code. */ + +/* DMA TX Channel type. Right now only limitations used are event types 0/1, + * for event-triggered DMA transactions. + */ + +enum pasemi_dmachan_type { + RXCHAN = 0, /* Any RX chan */ + TXCHAN = 1, /* Any TX chan */ + TXCHAN_EVT0 = 0x1001, /* TX chan in event class 0 (chan 0-9) */ + TXCHAN_EVT1 = 0x2001, /* TX chan in event class 1 (chan 10-19) */ +}; + +struct pasemi_dmachan { + int chno; /* Channel number */ + enum pasemi_dmachan_type chan_type; /* TX / RX */ + u64 *status; /* Ptr to cacheable status */ + int irq; /* IRQ used by channel */ + unsigned int ring_size; /* size of allocated ring */ + dma_addr_t ring_dma; /* DMA address for ring */ + u64 *ring_virt; /* Virt address for ring */ + void *priv; /* Ptr to start of client struct */ +}; + +/* Read/write the different registers in the I/O Bridge, Ethernet + * and DMA Controller + */ +extern unsigned int pasemi_read_iob_reg(unsigned int reg); +extern void pasemi_write_iob_reg(unsigned int reg, unsigned int val); + +extern unsigned int pasemi_read_mac_reg(int intf, unsigned int reg); +extern void pasemi_write_mac_reg(int intf, unsigned int reg, unsigned int val); + +extern unsigned int pasemi_read_dma_reg(unsigned int reg); +extern void pasemi_write_dma_reg(unsigned int reg, unsigned int val); + +/* Channel management routines */ + +extern void *pasemi_dma_alloc_chan(enum pasemi_dmachan_type type, + int total_size, int offset); +extern void pasemi_dma_free_chan(struct pasemi_dmachan *chan); + +extern void pasemi_dma_start_chan(const struct pasemi_dmachan *chan, + const u32 cmdsta); +extern int pasemi_dma_stop_chan(const struct pasemi_dmachan *chan); + +/* Common routines to allocate rings and buffers */ + +extern int pasemi_dma_alloc_ring(struct pasemi_dmachan *chan, int ring_size); +extern void pasemi_dma_free_ring(struct pasemi_dmachan *chan); + +extern void *pasemi_dma_alloc_buf(struct pasemi_dmachan *chan, int size, + dma_addr_t *handle); +extern void pasemi_dma_free_buf(struct pasemi_dmachan *chan, int size, + dma_addr_t *handle); + +/* Initialize the library, must be called before any other functions */ +extern int pasemi_dma_init(void); + #endif /* ASM_PASEMI_DMA_H */ |