diff options
Diffstat (limited to 'target/linux/ifxmips/files-2.6.30/arch/mips/include/asm/mach-ifxmips/ifxmips_dma.h')
| -rw-r--r-- | target/linux/ifxmips/files-2.6.30/arch/mips/include/asm/mach-ifxmips/ifxmips_dma.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/target/linux/ifxmips/files-2.6.30/arch/mips/include/asm/mach-ifxmips/ifxmips_dma.h b/target/linux/ifxmips/files-2.6.30/arch/mips/include/asm/mach-ifxmips/ifxmips_dma.h new file mode 100644 index 000000000..8ba852a1e --- /dev/null +++ b/target/linux/ifxmips/files-2.6.30/arch/mips/include/asm/mach-ifxmips/ifxmips_dma.h @@ -0,0 +1,195 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) 2005 infineon + * Copyright (C) 2007 John Crispin <blogic@openwrt.org> + * + */ +#ifndef _IFXMIPS_DMA_H__ +#define _IFXMIPS_DMA_H__ + +#define RCV_INT 1 +#define TX_BUF_FULL_INT 2 +#define TRANSMIT_CPT_INT 4 +#define IFXMIPS_DMA_CH_ON 1 +#define IFXMIPS_DMA_CH_OFF 0 +#define IFXMIPS_DMA_CH_DEFAULT_WEIGHT 100 + +enum attr_t{ + TX = 0, + RX = 1, + RESERVED = 2, + DEFAULT = 3, +}; + +#define DMA_OWN 1 +#define CPU_OWN 0 +#define DMA_MAJOR 250 + +#define DMA_DESC_OWN_CPU 0x0 +#define DMA_DESC_OWN_DMA 0x80000000 +#define DMA_DESC_CPT_SET 0x40000000 +#define DMA_DESC_SOP_SET 0x20000000 +#define DMA_DESC_EOP_SET 0x10000000 + +#define MISCFG_MASK 0x40 +#define RDERR_MASK 0x20 +#define CHOFF_MASK 0x10 +#define DESCPT_MASK 0x8 +#define DUR_MASK 0x4 +#define EOP_MASK 0x2 + +#define DMA_DROP_MASK (1<<31) + +#define IFXMIPS_DMA_RX -1 +#define IFXMIPS_DMA_TX 1 + +struct dma_chan_map { + const char *dev_name; + enum attr_t dir; + int pri; + int irq; + int rel_chan_no; +}; + +#ifdef CONFIG_CPU_LITTLE_ENDIAN +struct rx_desc { + u32 data_length:16; + volatile u32 reserved:7; + volatile u32 byte_offset:2; + volatile u32 Burst_length_offset:3; + volatile u32 EoP:1; + volatile u32 Res:1; + volatile u32 C:1; + volatile u32 OWN:1; + volatile u32 Data_Pointer; /* fixme: should be 28 bits here */ +}; + +struct tx_desc { + volatile u32 data_length:16; + volatile u32 reserved1:7; + volatile u32 byte_offset:5; + volatile u32 EoP:1; + volatile u32 SoP:1; + volatile u32 C:1; + volatile u32 OWN:1; + volatile u32 Data_Pointer; /* fixme: should be 28 bits here */ +}; +#else /* BIG */ +struct rx_desc { + union { + struct { + volatile u32 OWN:1; + volatile u32 C:1; + volatile u32 SoP:1; + volatile u32 EoP:1; + volatile u32 Burst_length_offset:3; + volatile u32 byte_offset:2; + volatile u32 reserve:7; + volatile u32 data_length:16; + } field; + volatile u32 word; + } status; + volatile u32 Data_Pointer; +}; + +struct tx_desc { + union { + struct { + volatile u32 OWN:1; + volatile u32 C:1; + volatile u32 SoP:1; + volatile u32 EoP:1; + volatile u32 byte_offset:5; + volatile u32 reserved:7; + volatile u32 data_length:16; + } field; + volatile u32 word; + } status; + volatile u32 Data_Pointer; +}; +#endif /* ENDIAN */ + +struct dma_channel_info { + /* relative channel number */ + int rel_chan_no; + /* class for this channel for QoS */ + int pri; + /* specify byte_offset */ + int byte_offset; + /* direction */ + int dir; + /* irq number */ + int irq; + /* descriptor parameter */ + int desc_base; + int desc_len; + int curr_desc; + int prev_desc; /* only used if it is a tx channel*/ + /* weight setting for WFQ algorithm*/ + int weight; + int default_weight; + int packet_size; + int burst_len; + /* on or off of this channel */ + int control; + /* optional information for the upper layer devices */ +#if defined(CONFIG_IFXMIPS_ETHERNET_D2) || defined(CONFIG_IFXMIPS_PPA) + void *opt[64]; +#else + void *opt[25]; +#endif + /* Pointer to the peripheral device who is using this channel */ + void *dma_dev; + /* channel operations */ + void (*open)(struct dma_channel_info *pCh); + void (*close)(struct dma_channel_info *pCh); + void (*reset)(struct dma_channel_info *pCh); + void (*enable_irq)(struct dma_channel_info *pCh); + void (*disable_irq)(struct dma_channel_info *pCh); +}; + +struct dma_device_info { + /* device name of this peripheral */ + char device_name[15]; + int reserved; + int tx_burst_len; + int rx_burst_len; + int default_weight; + int current_tx_chan; + int current_rx_chan; + int num_tx_chan; + int num_rx_chan; + int max_rx_chan_num; + int max_tx_chan_num; + struct dma_channel_info *tx_chan[20]; + struct dma_channel_info *rx_chan[20]; + /*functions, optional*/ + u8 *(*buffer_alloc)(int len, int *offset, void **opt); + void (*buffer_free)(u8 *dataptr, void *opt); + int (*intr_handler)(struct dma_device_info *info, int status); + void *priv; /* used by peripheral driver only */ +}; + +struct dma_device_info *dma_device_reserve(char *dev_name); +void dma_device_release(struct dma_device_info *dev); +void dma_device_register(struct dma_device_info *info); +void dma_device_unregister(struct dma_device_info *info); +int dma_device_read(struct dma_device_info *info, u8 **dataptr, void **opt); +int dma_device_write(struct dma_device_info *info, u8 *dataptr, int len, + void *opt); + +#endif + |