26a940e217
- converted to platform bus
- removed pci dependencies
- removed virt_to_phys/phys_to_virt calls
System now can root off of a disk.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/Documentation/mips/AU1xxx_IDE.README b/Documentation/mips/AU1xxx_IDE.README
new file mode 100644
394 lines
13 KiB
C
394 lines
13 KiB
C
/*
|
|
*
|
|
* 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 Controllers, first
|
|
* seen in the AU1550 part.
|
|
*/
|
|
#ifndef _AU1000_DBDMA_H_
|
|
#define _AU1000_DBDMA_H_
|
|
|
|
#include <linux/config.h>
|
|
|
|
#ifndef _LANGUAGE_ASSEMBLY
|
|
|
|
/* The DMA base addresses.
|
|
* The Channels are every 256 bytes (0x0100) from the channel 0 base.
|
|
* Interrupt status/enable is bits 15:0 for channels 15 to zero.
|
|
*/
|
|
#define DDMA_GLOBAL_BASE 0xb4003000
|
|
#define DDMA_CHANNEL_BASE 0xb4002000
|
|
|
|
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 32bytes are HW specific!!!
|
|
Lets have some SW data following.. make sure its 32bytes
|
|
*/
|
|
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.
|
|
*/
|
|
#ifdef CONFIG_SOC_AU1550
|
|
#define DSCR_CMD0_UART0_TX 0
|
|
#define DSCR_CMD0_UART0_RX 1
|
|
#define DSCR_CMD0_UART3_TX 2
|
|
#define DSCR_CMD0_UART3_RX 3
|
|
#define DSCR_CMD0_DMA_REQ0 4
|
|
#define DSCR_CMD0_DMA_REQ1 5
|
|
#define DSCR_CMD0_DMA_REQ2 6
|
|
#define DSCR_CMD0_DMA_REQ3 7
|
|
#define DSCR_CMD0_USBDEV_RX0 8
|
|
#define DSCR_CMD0_USBDEV_TX0 9
|
|
#define DSCR_CMD0_USBDEV_TX1 10
|
|
#define DSCR_CMD0_USBDEV_TX2 11
|
|
#define DSCR_CMD0_USBDEV_RX3 12
|
|
#define DSCR_CMD0_USBDEV_RX4 13
|
|
#define DSCR_CMD0_PSC0_TX 14
|
|
#define DSCR_CMD0_PSC0_RX 15
|
|
#define DSCR_CMD0_PSC1_TX 16
|
|
#define DSCR_CMD0_PSC1_RX 17
|
|
#define DSCR_CMD0_PSC2_TX 18
|
|
#define DSCR_CMD0_PSC2_RX 19
|
|
#define DSCR_CMD0_PSC3_TX 20
|
|
#define DSCR_CMD0_PSC3_RX 21
|
|
#define DSCR_CMD0_PCI_WRITE 22
|
|
#define DSCR_CMD0_NAND_FLASH 23
|
|
#define DSCR_CMD0_MAC0_RX 24
|
|
#define DSCR_CMD0_MAC0_TX 25
|
|
#define DSCR_CMD0_MAC1_RX 26
|
|
#define DSCR_CMD0_MAC1_TX 27
|
|
#endif /* CONFIG_SOC_AU1550 */
|
|
|
|
#ifdef CONFIG_SOC_AU1200
|
|
#define DSCR_CMD0_UART0_TX 0
|
|
#define DSCR_CMD0_UART0_RX 1
|
|
#define DSCR_CMD0_UART1_TX 2
|
|
#define DSCR_CMD0_UART1_RX 3
|
|
#define DSCR_CMD0_DMA_REQ0 4
|
|
#define DSCR_CMD0_DMA_REQ1 5
|
|
#define DSCR_CMD0_MAE_BE 6
|
|
#define DSCR_CMD0_MAE_FE 7
|
|
#define DSCR_CMD0_SDMS_TX0 8
|
|
#define DSCR_CMD0_SDMS_RX0 9
|
|
#define DSCR_CMD0_SDMS_TX1 10
|
|
#define DSCR_CMD0_SDMS_RX1 11
|
|
#define DSCR_CMD0_AES_TX 13
|
|
#define DSCR_CMD0_AES_RX 12
|
|
#define DSCR_CMD0_PSC0_TX 14
|
|
#define DSCR_CMD0_PSC0_RX 15
|
|
#define DSCR_CMD0_PSC1_TX 16
|
|
#define DSCR_CMD0_PSC1_RX 17
|
|
#define DSCR_CMD0_CIM_RXA 18
|
|
#define DSCR_CMD0_CIM_RXB 19
|
|
#define DSCR_CMD0_CIM_RXC 20
|
|
#define DSCR_CMD0_MAE_BOTH 21
|
|
#define DSCR_CMD0_LCD 22
|
|
#define DSCR_CMD0_NAND_FLASH 23
|
|
#define DSCR_CMD0_PSC0_SYNC 24
|
|
#define DSCR_CMD0_PSC1_SYNC 25
|
|
#define DSCR_CMD0_CIM_SYNC 26
|
|
#endif /* CONFIG_SOC_AU1200 */
|
|
|
|
#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;
|
|
au1x_ddma_desc_t *get_ptr, *put_ptr, *cur_ptr;
|
|
void *chan_callparam;
|
|
void (*chan_callback)(int, void *, struct pt_regs *);
|
|
} 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.
|
|
*/
|
|
u32 au1xxx_dbdma_chan_alloc(u32 srcid, u32 destid,
|
|
void (*callback)(int, void *, struct pt_regs *), void *callparam);
|
|
|
|
#define DBDMA_MEM_CHAN DSCR_CMD0_ALWAYS
|
|
|
|
/* Set the device width of a 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, void *buf, int nbytes, u32 flags);
|
|
u32 _au1xxx_dbdma_put_dest(u32 chanid, void *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 );
|
|
void * au1xxx_ddma_get_nextptr_virt(au1x_ddma_desc_t *dp);
|
|
|
|
/*
|
|
Some compatibilty macros --
|
|
Needed to make changes to API without breaking existing drivers
|
|
*/
|
|
#define au1xxx_dbdma_put_source(chanid,buf,nbytes)_au1xxx_dbdma_put_source(chanid, buf, nbytes, DDMA_FLAGS_IE)
|
|
#define au1xxx_dbdma_put_source_flags(chanid,buf,nbytes,flags) _au1xxx_dbdma_put_source(chanid, buf, nbytes, flags)
|
|
#define put_source_flags(chanid,buf,nbytes,flags) au1xxx_dbdma_put_source_flags(chanid,buf,nbytes,flags)
|
|
|
|
|
|
#define au1xxx_dbdma_put_dest(chanid,buf,nbytes) _au1xxx_dbdma_put_dest(chanid, buf, nbytes, DDMA_FLAGS_IE)
|
|
#define au1xxx_dbdma_put_dest_flags(chanid,buf,nbytes,flags) _au1xxx_dbdma_put_dest(chanid, buf, nbytes, flags)
|
|
#define put_dest_flags(chanid,buf,nbytes,flags) au1xxx_dbdma_put_dest_flags(chanid,buf,nbytes,flags)
|
|
|
|
/*
|
|
* 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_ */
|