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linux-headers-6.8.0-83-generic
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arch
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include
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mac_iop.h
/* SPDX-License-Identifier: GPL-2.0 */ /* * I/O Processor (IOP) defines and structures, mostly snagged from A/UX * header files. * * The original header from which this was taken is copyrighted. I've done some * rewriting (in fact my changes make this a bit more readable, IMHO) but some * more should be done. */ /* * This is the base address of the IOPs. Use this as the address of * a "struct iop" (see below) to see where the actual registers fall. */ #define SCC_IOP_BASE_IIFX (0x50F04000) #define ISM_IOP_BASE_IIFX (0x50F12000) #define SCC_IOP_BASE_QUADRA (0x50F0C000) #define ISM_IOP_BASE_QUADRA (0x50F1E000) /* IOP status/control register bits: */ #define IOP_BYPASS 0x01 /* bypass-mode hardware access */ #define IOP_AUTOINC 0x02 /* allow autoincrement of ramhi/lo */ #define IOP_RUN 0x04 /* set to 0 to reset IOP chip */ #define IOP_IRQ 0x08 /* generate IRQ to IOP if 1 */ #define IOP_INT0 0x10 /* intr priority from IOP to host */ #define IOP_INT1 0x20 /* intr priority from IOP to host */ #define IOP_HWINT 0x40 /* IRQ from hardware; bypass mode only */ #define IOP_DMAINACTIVE 0x80 /* no DMA request active; bypass mode only */ #define NUM_IOPS 2 #define NUM_IOP_CHAN 7 #define NUM_IOP_MSGS NUM_IOP_CHAN*8 #define IOP_MSG_LEN 32 /* IOP reference numbers, used by the globally-visible iop_xxx functions */ #define IOP_NUM_SCC 0 #define IOP_NUM_ISM 1 /* IOP channel states */ #define IOP_MSG_IDLE 0 /* idle */ #define IOP_MSG_NEW 1 /* new message sent */ #define IOP_MSG_RCVD 2 /* message received; processing */ #define IOP_MSG_COMPLETE 3 /* message processing complete */ /* IOP message status codes */ #define IOP_MSGSTATUS_UNUSED 0 /* Unused message structure */ #define IOP_MSGSTATUS_WAITING 1 /* waiting for channel */ #define IOP_MSGSTATUS_SENT 2 /* message sent, awaiting reply */ #define IOP_MSGSTATUS_COMPLETE 3 /* message complete and reply rcvd */ #define IOP_MSGSTATUS_UNSOL 6 /* message is unsolicited */ /* IOP memory addresses of the members of the mac_iop_kernel structure. */ #define IOP_ADDR_MAX_SEND_CHAN 0x0200 #define IOP_ADDR_SEND_STATE 0x0201 #define IOP_ADDR_PATCH_CTRL 0x021F #define IOP_ADDR_SEND_MSG 0x0220 #define IOP_ADDR_MAX_RECV_CHAN 0x0300 #define IOP_ADDR_RECV_STATE 0x0301 #define IOP_ADDR_ALIVE 0x031F #define IOP_ADDR_RECV_MSG 0x0320 #ifndef __ASSEMBLY__ /* * IOP Control registers, staggered because in usual Apple style they were * too lazy to decode the A0 bit. This structure is assumed to begin at * one of the xxx_IOP_BASE addresses given above. */ struct mac_iop { __u8 ram_addr_hi; /* shared RAM address hi byte */ __u8 pad0; __u8 ram_addr_lo; /* shared RAM address lo byte */ __u8 pad1; __u8 status_ctrl; /* status/control register */ __u8 pad2[3]; __u8 ram_data; /* RAM data byte at ramhi/lo */ __u8 pad3[23]; /* Bypass-mode hardware access registers */ union { struct { /* SCC registers */ __u8 sccb_cmd; /* SCC B command reg */ __u8 pad4; __u8 scca_cmd; /* SCC A command reg */ __u8 pad5; __u8 sccb_data; /* SCC B data */ __u8 pad6; __u8 scca_data; /* SCC A data */ } scc_regs; struct { /* ISM registers */ __u8 wdata; /* write a data byte */ __u8 pad7; __u8 wmark; /* write a mark byte */ __u8 pad8; __u8 wcrc; /* write 2-byte crc to disk */ __u8 pad9; __u8 wparams; /* write the param regs */ __u8 pad10; __u8 wphase; /* write the phase states & dirs */ __u8 pad11; __u8 wsetup; /* write the setup register */ __u8 pad12; __u8 wzeroes; /* mode reg: 1's clr bits, 0's are x */ __u8 pad13; __u8 wones; /* mode reg: 1's set bits, 0's are x */ __u8 pad14; __u8 rdata; /* read a data byte */ __u8 pad15; __u8 rmark; /* read a mark byte */ __u8 pad16; __u8 rerror; /* read the error register */ __u8 pad17; __u8 rparams; /* read the param regs */ __u8 pad18; __u8 rphase; /* read the phase states & dirs */ __u8 pad19; __u8 rsetup; /* read the setup register */ __u8 pad20; __u8 rmode; /* read the mode register */ __u8 pad21; __u8 rhandshake; /* read the handshake register */ } ism_regs; } b; }; /* This structure is used to track IOP messages in the Linux kernel */ struct iop_msg { struct iop_msg *next; /* next message in queue or NULL */ uint iop_num; /* IOP number */ uint channel; /* channel number */ void *caller_priv; /* caller private data */ int status; /* status of this message */ __u8 message[IOP_MSG_LEN]; /* the message being sent/received */ __u8 reply[IOP_MSG_LEN]; /* the reply to the message */ void (*handler)(struct iop_msg *); /* function to call when reply recvd */ }; extern int iop_scc_present,iop_ism_present; extern int iop_listen(uint, uint, void (*handler)(struct iop_msg *), const char *); extern int iop_send_message(uint, uint, void *, uint, __u8 *, void (*)(struct iop_msg *)); extern void iop_complete_message(struct iop_msg *); extern void iop_upload_code(uint, __u8 *, uint, __u16); extern void iop_download_code(uint, __u8 *, uint, __u16); extern __u8 *iop_compare_code(uint, __u8 *, uint, __u16); extern void iop_ism_irq_poll(uint); extern void iop_register_interrupts(void); #endif /* __ASSEMBLY__ */
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