| /* | |
| * | |
| * BRIEF MODULE DESCRIPTION | |
| * Include file for Alchemy Semiconductor's Au1550 Descriptor | |
| * Based DMA Controller. | |
| * | |
| * Copyright 2004 Embedded Edge, LLC | |
| * dan@embeddededge.com | |
| * | |
| * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
| * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| * | |
| * 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., | |
| * 675 Mass Ave, Cambridge, MA 02139, USA. | |
| */ | |
| /* | |
| * Specifics for the Au1xxx Descriptor-Based DMA Controller, | |
| * first seen in the AU1550 part. | |
| */ | |
| #ifndef _AU1000_DBDMA_H_ | |
| #define _AU1000_DBDMA_H_ | |
| #ifndef _LANGUAGE_ASSEMBLY | |
| typedef volatile struct dbdma_global { | |
| u32 ddma_config; | |
| u32 ddma_intstat; | |
| u32 ddma_throttle; | |
| u32 ddma_inten; | |
| } dbdma_global_t; | |
| /* General Configuration. */ | |
| #define DDMA_CONFIG_AF (1 << 2) | |
| #define DDMA_CONFIG_AH (1 << 1) | |
| #define DDMA_CONFIG_AL (1 << 0) | |
| #define DDMA_THROTTLE_EN (1 << 31) | |
| /* The structure of a DMA Channel. */ | |
| typedef volatile struct au1xxx_dma_channel { | |
| u32 ddma_cfg; /* See below */ | |
| u32 ddma_desptr; /* 32-byte aligned pointer to descriptor */ | |
| u32 ddma_statptr; /* word aligned pointer to status word */ | |
| u32 ddma_dbell; /* A write activates channel operation */ | |
| u32 ddma_irq; /* If bit 0 set, interrupt pending */ | |
| u32 ddma_stat; /* See below */ | |
| u32 ddma_bytecnt; /* Byte count, valid only when chan idle */ | |
| /* Remainder, up to the 256 byte boundary, is reserved. */ | |
| } au1x_dma_chan_t; | |
| #define DDMA_CFG_SED (1 << 9) /* source DMA level/edge detect */ | |
| #define DDMA_CFG_SP (1 << 8) /* source DMA polarity */ | |
| #define DDMA_CFG_DED (1 << 7) /* destination DMA level/edge detect */ | |
| #define DDMA_CFG_DP (1 << 6) /* destination DMA polarity */ | |
| #define DDMA_CFG_SYNC (1 << 5) /* Sync static bus controller */ | |
| #define DDMA_CFG_PPR (1 << 4) /* PCI posted read/write control */ | |
| #define DDMA_CFG_DFN (1 << 3) /* Descriptor fetch non-coherent */ | |
| #define DDMA_CFG_SBE (1 << 2) /* Source big endian */ | |
| #define DDMA_CFG_DBE (1 << 1) /* Destination big endian */ | |
| #define DDMA_CFG_EN (1 << 0) /* Channel enable */ | |
| /* | |
| * Always set when descriptor processing done, regardless of | |
| * interrupt enable state. Reflected in global intstat, don't | |
| * clear this until global intstat is read/used. | |
| */ | |
| #define DDMA_IRQ_IN (1 << 0) | |
| #define DDMA_STAT_DB (1 << 2) /* Doorbell pushed */ | |
| #define DDMA_STAT_V (1 << 1) /* Descriptor valid */ | |
| #define DDMA_STAT_H (1 << 0) /* Channel Halted */ | |
| /* | |
| * "Standard" DDMA Descriptor. | |
| * Must be 32-byte aligned. | |
| */ | |
| typedef volatile struct au1xxx_ddma_desc { | |
| u32 dscr_cmd0; /* See below */ | |
| u32 dscr_cmd1; /* See below */ | |
| u32 dscr_source0; /* source phys address */ | |
| u32 dscr_source1; /* See below */ | |
| u32 dscr_dest0; /* Destination address */ | |
| u32 dscr_dest1; /* See below */ | |
| u32 dscr_stat; /* completion status */ | |
| u32 dscr_nxtptr; /* Next descriptor pointer (mostly) */ | |
| /* | |
| * First 32 bytes are HW specific!!! | |
| * Let's have some SW data following -- make sure it's 32 bytes. | |
| */ | |
| u32 sw_status; | |
| u32 sw_context; | |
| u32 sw_reserved[6]; | |
| } au1x_ddma_desc_t; | |
| #define DSCR_CMD0_V (1 << 31) /* Descriptor valid */ | |
| #define DSCR_CMD0_MEM (1 << 30) /* mem-mem transfer */ | |
| #define DSCR_CMD0_SID_MASK (0x1f << 25) /* Source ID */ | |
| #define DSCR_CMD0_DID_MASK (0x1f << 20) /* Destination ID */ | |
| #define DSCR_CMD0_SW_MASK (0x3 << 18) /* Source Width */ | |
| #define DSCR_CMD0_DW_MASK (0x3 << 16) /* Destination Width */ | |
| #define DSCR_CMD0_ARB (0x1 << 15) /* Set for Hi Pri */ | |
| #define DSCR_CMD0_DT_MASK (0x3 << 13) /* Descriptor Type */ | |
| #define DSCR_CMD0_SN (0x1 << 12) /* Source non-coherent */ | |
| #define DSCR_CMD0_DN (0x1 << 11) /* Destination non-coherent */ | |
| #define DSCR_CMD0_SM (0x1 << 10) /* Stride mode */ | |
| #define DSCR_CMD0_IE (0x1 << 8) /* Interrupt Enable */ | |
| #define DSCR_CMD0_SP (0x1 << 4) /* Status pointer select */ | |
| #define DSCR_CMD0_CV (0x1 << 2) /* Clear Valid when done */ | |
| #define DSCR_CMD0_ST_MASK (0x3 << 0) /* Status instruction */ | |
| #define SW_STATUS_INUSE (1 << 0) | |
| /* Command 0 device IDs. */ | |
| #define AU1550_DSCR_CMD0_UART0_TX 0 | |
| #define AU1550_DSCR_CMD0_UART0_RX 1 | |
| #define AU1550_DSCR_CMD0_UART3_TX 2 | |
| #define AU1550_DSCR_CMD0_UART3_RX 3 | |
| #define AU1550_DSCR_CMD0_DMA_REQ0 4 | |
| #define AU1550_DSCR_CMD0_DMA_REQ1 5 | |
| #define AU1550_DSCR_CMD0_DMA_REQ2 6 | |
| #define AU1550_DSCR_CMD0_DMA_REQ3 7 | |
| #define AU1550_DSCR_CMD0_USBDEV_RX0 8 | |
| #define AU1550_DSCR_CMD0_USBDEV_TX0 9 | |
| #define AU1550_DSCR_CMD0_USBDEV_TX1 10 | |
| #define AU1550_DSCR_CMD0_USBDEV_TX2 11 | |
| #define AU1550_DSCR_CMD0_USBDEV_RX3 12 | |
| #define AU1550_DSCR_CMD0_USBDEV_RX4 13 | |
| #define AU1550_DSCR_CMD0_PSC0_TX 14 | |
| #define AU1550_DSCR_CMD0_PSC0_RX 15 | |
| #define AU1550_DSCR_CMD0_PSC1_TX 16 | |
| #define AU1550_DSCR_CMD0_PSC1_RX 17 | |
| #define AU1550_DSCR_CMD0_PSC2_TX 18 | |
| #define AU1550_DSCR_CMD0_PSC2_RX 19 | |
| #define AU1550_DSCR_CMD0_PSC3_TX 20 | |
| #define AU1550_DSCR_CMD0_PSC3_RX 21 | |
| #define AU1550_DSCR_CMD0_PCI_WRITE 22 | |
| #define AU1550_DSCR_CMD0_NAND_FLASH 23 | |
| #define AU1550_DSCR_CMD0_MAC0_RX 24 | |
| #define AU1550_DSCR_CMD0_MAC0_TX 25 | |
| #define AU1550_DSCR_CMD0_MAC1_RX 26 | |
| #define AU1550_DSCR_CMD0_MAC1_TX 27 | |
| #define AU1200_DSCR_CMD0_UART0_TX 0 | |
| #define AU1200_DSCR_CMD0_UART0_RX 1 | |
| #define AU1200_DSCR_CMD0_UART1_TX 2 | |
| #define AU1200_DSCR_CMD0_UART1_RX 3 | |
| #define AU1200_DSCR_CMD0_DMA_REQ0 4 | |
| #define AU1200_DSCR_CMD0_DMA_REQ1 5 | |
| #define AU1200_DSCR_CMD0_MAE_BE 6 | |
| #define AU1200_DSCR_CMD0_MAE_FE 7 | |
| #define AU1200_DSCR_CMD0_SDMS_TX0 8 | |
| #define AU1200_DSCR_CMD0_SDMS_RX0 9 | |
| #define AU1200_DSCR_CMD0_SDMS_TX1 10 | |
| #define AU1200_DSCR_CMD0_SDMS_RX1 11 | |
| #define AU1200_DSCR_CMD0_AES_TX 13 | |
| #define AU1200_DSCR_CMD0_AES_RX 12 | |
| #define AU1200_DSCR_CMD0_PSC0_TX 14 | |
| #define AU1200_DSCR_CMD0_PSC0_RX 15 | |
| #define AU1200_DSCR_CMD0_PSC1_TX 16 | |
| #define AU1200_DSCR_CMD0_PSC1_RX 17 | |
| #define AU1200_DSCR_CMD0_CIM_RXA 18 | |
| #define AU1200_DSCR_CMD0_CIM_RXB 19 | |
| #define AU1200_DSCR_CMD0_CIM_RXC 20 | |
| #define AU1200_DSCR_CMD0_MAE_BOTH 21 | |
| #define AU1200_DSCR_CMD0_LCD 22 | |
| #define AU1200_DSCR_CMD0_NAND_FLASH 23 | |
| #define AU1200_DSCR_CMD0_PSC0_SYNC 24 | |
| #define AU1200_DSCR_CMD0_PSC1_SYNC 25 | |
| #define AU1200_DSCR_CMD0_CIM_SYNC 26 | |
| #define AU1300_DSCR_CMD0_UART0_TX 0 | |
| #define AU1300_DSCR_CMD0_UART0_RX 1 | |
| #define AU1300_DSCR_CMD0_UART1_TX 2 | |
| #define AU1300_DSCR_CMD0_UART1_RX 3 | |
| #define AU1300_DSCR_CMD0_UART2_TX 4 | |
| #define AU1300_DSCR_CMD0_UART2_RX 5 | |
| #define AU1300_DSCR_CMD0_UART3_TX 6 | |
| #define AU1300_DSCR_CMD0_UART3_RX 7 | |
| #define AU1300_DSCR_CMD0_SDMS_TX0 8 | |
| #define AU1300_DSCR_CMD0_SDMS_RX0 9 | |
| #define AU1300_DSCR_CMD0_SDMS_TX1 10 | |
| #define AU1300_DSCR_CMD0_SDMS_RX1 11 | |
| #define AU1300_DSCR_CMD0_AES_TX 12 | |
| #define AU1300_DSCR_CMD0_AES_RX 13 | |
| #define AU1300_DSCR_CMD0_PSC0_TX 14 | |
| #define AU1300_DSCR_CMD0_PSC0_RX 15 | |
| #define AU1300_DSCR_CMD0_PSC1_TX 16 | |
| #define AU1300_DSCR_CMD0_PSC1_RX 17 | |
| #define AU1300_DSCR_CMD0_PSC2_TX 18 | |
| #define AU1300_DSCR_CMD0_PSC2_RX 19 | |
| #define AU1300_DSCR_CMD0_PSC3_TX 20 | |
| #define AU1300_DSCR_CMD0_PSC3_RX 21 | |
| #define AU1300_DSCR_CMD0_LCD 22 | |
| #define AU1300_DSCR_CMD0_NAND_FLASH 23 | |
| #define AU1300_DSCR_CMD0_SDMS_TX2 24 | |
| #define AU1300_DSCR_CMD0_SDMS_RX2 25 | |
| #define AU1300_DSCR_CMD0_CIM_SYNC 26 | |
| #define AU1300_DSCR_CMD0_UDMA 27 | |
| #define AU1300_DSCR_CMD0_DMA_REQ0 28 | |
| #define AU1300_DSCR_CMD0_DMA_REQ1 29 | |
| #define DSCR_CMD0_THROTTLE 30 | |
| #define DSCR_CMD0_ALWAYS 31 | |
| #define DSCR_NDEV_IDS 32 | |
| /* This macro is used to find/create custom device types */ | |
| #define DSCR_DEV2CUSTOM_ID(x, d) (((((x) & 0xFFFF) << 8) | 0x32000000) | \ | |
| ((d) & 0xFF)) | |
| #define DSCR_CUSTOM2DEV_ID(x) ((x) & 0xFF) | |
| #define DSCR_CMD0_SID(x) (((x) & 0x1f) << 25) | |
| #define DSCR_CMD0_DID(x) (((x) & 0x1f) << 20) | |
| /* Source/Destination transfer width. */ | |
| #define DSCR_CMD0_BYTE 0 | |
| #define DSCR_CMD0_HALFWORD 1 | |
| #define DSCR_CMD0_WORD 2 | |
| #define DSCR_CMD0_SW(x) (((x) & 0x3) << 18) | |
| #define DSCR_CMD0_DW(x) (((x) & 0x3) << 16) | |
| /* DDMA Descriptor Type. */ | |
| #define DSCR_CMD0_STANDARD 0 | |
| #define DSCR_CMD0_LITERAL 1 | |
| #define DSCR_CMD0_CMP_BRANCH 2 | |
| #define DSCR_CMD0_DT(x) (((x) & 0x3) << 13) | |
| /* Status Instruction. */ | |
| #define DSCR_CMD0_ST_NOCHANGE 0 /* Don't change */ | |
| #define DSCR_CMD0_ST_CURRENT 1 /* Write current status */ | |
| #define DSCR_CMD0_ST_CMD0 2 /* Write cmd0 with V cleared */ | |
| #define DSCR_CMD0_ST_BYTECNT 3 /* Write remaining byte count */ | |
| #define DSCR_CMD0_ST(x) (((x) & 0x3) << 0) | |
| /* Descriptor Command 1. */ | |
| #define DSCR_CMD1_SUPTR_MASK (0xf << 28) /* upper 4 bits of src addr */ | |
| #define DSCR_CMD1_DUPTR_MASK (0xf << 24) /* upper 4 bits of dest addr */ | |
| #define DSCR_CMD1_FL_MASK (0x3 << 22) /* Flag bits */ | |
| #define DSCR_CMD1_BC_MASK (0x3fffff) /* Byte count */ | |
| /* Flag description. */ | |
| #define DSCR_CMD1_FL_MEM_STRIDE0 0 | |
| #define DSCR_CMD1_FL_MEM_STRIDE1 1 | |
| #define DSCR_CMD1_FL_MEM_STRIDE2 2 | |
| #define DSCR_CMD1_FL(x) (((x) & 0x3) << 22) | |
| /* Source1, 1-dimensional stride. */ | |
| #define DSCR_SRC1_STS_MASK (3 << 30) /* Src xfer size */ | |
| #define DSCR_SRC1_SAM_MASK (3 << 28) /* Src xfer movement */ | |
| #define DSCR_SRC1_SB_MASK (0x3fff << 14) /* Block size */ | |
| #define DSCR_SRC1_SB(x) (((x) & 0x3fff) << 14) | |
| #define DSCR_SRC1_SS_MASK (0x3fff << 0) /* Stride */ | |
| #define DSCR_SRC1_SS(x) (((x) & 0x3fff) << 0) | |
| /* Dest1, 1-dimensional stride. */ | |
| #define DSCR_DEST1_DTS_MASK (3 << 30) /* Dest xfer size */ | |
| #define DSCR_DEST1_DAM_MASK (3 << 28) /* Dest xfer movement */ | |
| #define DSCR_DEST1_DB_MASK (0x3fff << 14) /* Block size */ | |
| #define DSCR_DEST1_DB(x) (((x) & 0x3fff) << 14) | |
| #define DSCR_DEST1_DS_MASK (0x3fff << 0) /* Stride */ | |
| #define DSCR_DEST1_DS(x) (((x) & 0x3fff) << 0) | |
| #define DSCR_xTS_SIZE1 0 | |
| #define DSCR_xTS_SIZE2 1 | |
| #define DSCR_xTS_SIZE4 2 | |
| #define DSCR_xTS_SIZE8 3 | |
| #define DSCR_SRC1_STS(x) (((x) & 3) << 30) | |
| #define DSCR_DEST1_DTS(x) (((x) & 3) << 30) | |
| #define DSCR_xAM_INCREMENT 0 | |
| #define DSCR_xAM_DECREMENT 1 | |
| #define DSCR_xAM_STATIC 2 | |
| #define DSCR_xAM_BURST 3 | |
| #define DSCR_SRC1_SAM(x) (((x) & 3) << 28) | |
| #define DSCR_DEST1_DAM(x) (((x) & 3) << 28) | |
| /* The next descriptor pointer. */ | |
| #define DSCR_NXTPTR_MASK (0x07ffffff) | |
| #define DSCR_NXTPTR(x) ((x) >> 5) | |
| #define DSCR_GET_NXTPTR(x) ((x) << 5) | |
| #define DSCR_NXTPTR_MS (1 << 27) | |
| /* The number of DBDMA channels. */ | |
| #define NUM_DBDMA_CHANS 16 | |
| /* | |
| * DDMA API definitions | |
| * FIXME: may not fit to this header file | |
| */ | |
| typedef struct dbdma_device_table { | |
| u32 dev_id; | |
| u32 dev_flags; | |
| u32 dev_tsize; | |
| u32 dev_devwidth; | |
| u32 dev_physaddr; /* If FIFO */ | |
| u32 dev_intlevel; | |
| u32 dev_intpolarity; | |
| } dbdev_tab_t; | |
| typedef struct dbdma_chan_config { | |
| spinlock_t lock; | |
| u32 chan_flags; | |
| u32 chan_index; | |
| dbdev_tab_t *chan_src; | |
| dbdev_tab_t *chan_dest; | |
| au1x_dma_chan_t *chan_ptr; | |
| au1x_ddma_desc_t *chan_desc_base; | |
| u32 cdb_membase; /* kmalloc base of above */ | |
| au1x_ddma_desc_t *get_ptr, *put_ptr, *cur_ptr; | |
| void *chan_callparam; | |
| void (*chan_callback)(int, void *); | |
| } chan_tab_t; | |
| #define DEV_FLAGS_INUSE (1 << 0) | |
| #define DEV_FLAGS_ANYUSE (1 << 1) | |
| #define DEV_FLAGS_OUT (1 << 2) | |
| #define DEV_FLAGS_IN (1 << 3) | |
| #define DEV_FLAGS_BURSTABLE (1 << 4) | |
| #define DEV_FLAGS_SYNC (1 << 5) | |
| /* end DDMA API definitions */ | |
| /* | |
| * External functions for drivers to use. | |
| * Use this to allocate a DBDMA channel. The device IDs are one of | |
| * the DSCR_CMD0 devices IDs, which is usually redefined to a more | |
| * meaningful name. The 'callback' is called during DMA completion | |
| * interrupt. | |
| */ | |
| extern u32 au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid, | |
| void (*callback)(int, void *), | |
| void *callparam); | |
| #define DBDMA_MEM_CHAN DSCR_CMD0_ALWAYS | |
| /* Set the device width of an in/out FIFO. */ | |
| u32 au1xxx_dbdma_set_devwidth(u32 chanid, int bits); | |
| /* Allocate a ring of descriptors for DBDMA. */ | |
| u32 au1xxx_dbdma_ring_alloc(u32 chanid, int entries); | |
| /* Put buffers on source/destination descriptors. */ | |
| u32 au1xxx_dbdma_put_source(u32 chanid, dma_addr_t buf, int nbytes, u32 flags); | |
| u32 au1xxx_dbdma_put_dest(u32 chanid, dma_addr_t buf, int nbytes, u32 flags); | |
| /* Get a buffer from the destination descriptor. */ | |
| u32 au1xxx_dbdma_get_dest(u32 chanid, void **buf, int *nbytes); | |
| void au1xxx_dbdma_stop(u32 chanid); | |
| void au1xxx_dbdma_start(u32 chanid); | |
| void au1xxx_dbdma_reset(u32 chanid); | |
| u32 au1xxx_get_dma_residue(u32 chanid); | |
| void au1xxx_dbdma_chan_free(u32 chanid); | |
| void au1xxx_dbdma_dump(u32 chanid); | |
| u32 au1xxx_dbdma_put_dscr(u32 chanid, au1x_ddma_desc_t *dscr); | |
| u32 au1xxx_ddma_add_device(dbdev_tab_t *dev); | |
| extern void au1xxx_ddma_del_device(u32 devid); | |
| void *au1xxx_ddma_get_nextptr_virt(au1x_ddma_desc_t *dp); | |
| /* | |
| * Flags for the put_source/put_dest functions. | |
| */ | |
| #define DDMA_FLAGS_IE (1 << 0) | |
| #define DDMA_FLAGS_NOIE (1 << 1) | |
| #endif /* _LANGUAGE_ASSEMBLY */ | |
| #endif /* _AU1000_DBDMA_H_ */ |