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/* $OpenBSD: bppvar.h,v 1.2 2009/02/14 17:41:42 miod Exp $ */
/*
* Copyright (c) 2008, 2009 Miodrag Vallat.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies. And
* I won't mind if you keep the disclaimer below.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Register and structure definitions for MVME boards using the Motorola
* Buffered Pipe Protocol.
*/
/*
* Register layout (CSR space)
*/
#define CSR_ADDR 0x00 /* 32 */
#define CSR_ADDR_MOD 0x04 /* 8 */
#define CSR_DATA_WIDTH 0x05 /* 8 */
/* IPC control register */
#define CSR_CONTROL 0x06 /* 16 */
#define CSR_STATUS 0x08 /* 8 */
#define CSR_DIAG 0x09 /* 8 */
#define CSR_TAS 0x0e /* 16 */
/* CSR bits */
#define CSR_BUSY 0x8000 /* firmware busy */
#define CSR_RESET 0x4000 /* reset board */
#define CSR_ATTENTION 0x2000 /* interrupt firmware */
#define CSR_INHIBIT_SYSFAIL 0x1000
/* TAS bits */
#define TAS_TAS 0x8000 /* test and set bit */
#define TAS_VALID_COMMAND 0x4000
#define TAS_VALID_STATUS 0x2000
#define TAS_COMMAND_COMPLETE 0x1000
#define TAS_COMMAND_MASK 0x0fff
/* TAS commands */
#define COMMAND_CHANNEL_CREATE 0x001
#define COMMAND_CHANNEL_DELETE 0x002
#define COMMAND_DUMP_MEMORY 0x101
/* command status values */
#define STATUS_OK 0x00
#define STATUS_INVALID_COMMAND 0x01
#define STATUS_READ_CHANNEL_HEADER 0x02
#define STATUS_WRITE_CHANNEL_HEADER 0x03
#define STATUS_DMA_READ 0x04
#define STATUS_DMA_WRITE 0x05
#define STATUS_NO_MORE_CHANNELS 0x06
#define STATUS_NO_SUCH_CHANNEL 0x07
/* catastrophic errors start here... */
#define STATUS_LOCAL_ADDRESS_ERROR 0xaa
#define STATUS_ACFAIL 0xac
#define STATUS_LOCAL_BUS_ERROR 0xbb
#define STATUS_CONFIDENCE_FAILED 0xcc
#define STATUS_UNEXPECTED_ERROR 0xee
#define STATUS_ERRNO 0x100 /* not from status reg */
/*
* BPP Channel header
*/
struct bpp_channel {
uint32_t ch_cmd_head; /* command pipe head */
uint32_t ch_cmd_tail; /* command pipe tail */
uint32_t ch_status_head; /* status pipe head */
uint32_t ch_status_tail; /* status pipe tail */
uint8_t ch_ipl; /* channel interrupt level */
uint8_t ch_ivec; /* channel interrupt vector */
uint8_t ch_priority; /* channel priority */
#define BPP_PRIORITY_HIGHEST 0x00
#define BPP_PRIORITY_LOWEST 0xff
uint8_t ch_addrmod; /* envelope memory address modifier */
uint8_t ch_num; /* set by firmware */
uint8_t ch_valid; /* set by firmware */
uint8_t ch_buswidth; /* unused */
uint8_t reserved;
};
/*
* BPP Envelope structure
*/
struct bpp_envelope {
uint32_t env_link; /* next envelope */
uint32_t env_pkt; /* command packet physical address */
uint8_t env_valid;
#define ENVELOPE_INVALID 0x00
#define ENVELOPE_VALID 0x01 /* any nonzero value will do */
uint8_t reserved[3];
/*
* The following is not part of the envelope as defined by the
* firmware, but is used to page the envelope to a 68040/88200
* cache line boundary.
*/
uint32_t pad;
/* total size 0x10 bytes */
};
/*
* Data bus width
*/
#define MEMT_D16 1
#define MEMT_D32 2
/*
* The following defines ought to be in a MI vme header file...
*/
/*
* VME addressing modes
*/
#define ADRM_STD_S_P 0x3e /* standard supervisory program */
#define ADRM_STD_S_D 0x3d /* standard supervisory data */
#define ADRM_STD_N_P 0x3a /* standard normal program */
#define ADRM_STD_N_D 0x39 /* standard normal data */
#define ADRM_SHT_S_IO 0x2d /* short supervisory I/O */
#define ADRM_SHT_N_IO 0x29 /* short normal I/O */
#define ADRM_EXT_S_P 0x0e /* extended supervisory program */
#define ADRM_EXT_S_D 0x0d /* extended supervisory data */
#define ADRM_EXT_N_P 0x0a /* extended normal program */
#define ADRM_EXT_N_D 0x09 /* extended normal data */
#define ADRM_EXT_S_BM 0x0f /* extended supervisory block mode */
#define ADRM_EXT_S_D64 0x0c /* extended supervisory D64 mode */
/*
* Per channel information
*/
struct bpp_chan {
struct bpp_channel *ch; /* bpp communication channel */
struct bpp_envelope *envcmd; /* command tail envelope */
struct bpp_envelope *envsts; /* status head envelope */
};
/*
* Device superset
*/
struct bpp_softc {
struct device sc_dev;
bus_space_tag_t sc_iot; /* CSR registers access */
bus_space_handle_t sc_ioh;
struct bpp_envelope *sc_env_free; /* head of free envelope list */
/* channel function pointers */
paddr_t (*bpp_chan_pa)(struct bpp_softc *, struct bpp_channel *);
void (*bpp_chan_sync)(struct bpp_softc *, struct bpp_channel *, int);
/* envelope function pointers */
paddr_t (*bpp_env_pa)(struct bpp_softc *, struct bpp_envelope *);
struct bpp_envelope *(*bpp_env_va)(struct bpp_softc *, paddr_t);
void (*bpp_env_sync)(struct bpp_softc *, struct bpp_envelope *, int);
};
void bpp_attach(struct bpp_softc *, bus_space_tag_t, bus_space_handle_t);
void bpp_attention(struct bpp_softc *);
int bpp_create_channel(struct bpp_softc *, struct bpp_chan *,
int, int, int);
int bpp_dequeue_envelope(struct bpp_softc *, struct bpp_chan *, paddr_t *);
struct bpp_envelope *
bpp_get_envelope(struct bpp_softc *);
void bpp_initialize_envelopes(struct bpp_softc *, struct bpp_envelope *,
uint);
void bpp_put_envelope(struct bpp_softc *, struct bpp_envelope *);
void bpp_queue_envelope(struct bpp_softc *, struct bpp_chan *,
struct bpp_envelope *, paddr_t);
int bpp_reset(struct bpp_softc *);
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