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1/*
2 * I/O Processor (IOP) defines and structures, mostly snagged from A/UX
3 * header files.
4 *
5 * The original header from which this was taken is copyrighted. I've done some
6 * rewriting (in fact my changes make this a bit more readable, IMHO) but some
7 * more should be done.
8 */
9
10/*
11 * This is the base address of the IOPs. Use this as the address of
12 * a "struct iop" (see below) to see where the actual registers fall.
13 */
14
15#define SCC_IOP_BASE_IIFX (0x50F04000)
16#define ISM_IOP_BASE_IIFX (0x50F12000)
17
18#define SCC_IOP_BASE_QUADRA (0x50F0C000)
19#define ISM_IOP_BASE_QUADRA (0x50F1E000)
20
21/* IOP status/control register bits: */
22
23#define IOP_BYPASS 0x01 /* bypass-mode hardware access */
24#define IOP_AUTOINC 0x02 /* allow autoincrement of ramhi/lo */
25#define IOP_RUN 0x04 /* set to 0 to reset IOP chip */
26#define IOP_IRQ 0x08 /* generate IRQ to IOP if 1 */
27#define IOP_INT0 0x10 /* intr priority from IOP to host */
28#define IOP_INT1 0x20 /* intr priority from IOP to host */
29#define IOP_HWINT 0x40 /* IRQ from hardware; bypass mode only */
30#define IOP_DMAINACTIVE 0x80 /* no DMA request active; bypass mode only */
31
32#define NUM_IOPS 2
33#define NUM_IOP_CHAN 7
34#define NUM_IOP_MSGS NUM_IOP_CHAN*8
35#define IOP_MSG_LEN 32
36
37/* IOP reference numbers, used by the globally-visible iop_xxx functions */
38
39#define IOP_NUM_SCC 0
40#define IOP_NUM_ISM 1
41
42/* IOP channel states */
43
44#define IOP_MSG_IDLE 0 /* idle */
45#define IOP_MSG_NEW 1 /* new message sent */
46#define IOP_MSG_RCVD 2 /* message received; processing */
47#define IOP_MSG_COMPLETE 3 /* message processing complete */
48
49/* IOP message status codes */
50
51#define IOP_MSGSTATUS_UNUSED 0 /* Unusued message structure */
52#define IOP_MSGSTATUS_WAITING 1 /* waiting for channel */
53#define IOP_MSGSTATUS_SENT 2 /* message sent, awaiting reply */
54#define IOP_MSGSTATUS_COMPLETE 3 /* message complete and reply rcvd */
55#define IOP_MSGSTATUS_UNSOL 6 /* message is unsolicited */
56
57/* IOP memory addresses of the members of the mac_iop_kernel structure. */
58
59#define IOP_ADDR_MAX_SEND_CHAN 0x0200
60#define IOP_ADDR_SEND_STATE 0x0201
61#define IOP_ADDR_PATCH_CTRL 0x021F
62#define IOP_ADDR_SEND_MSG 0x0220
63#define IOP_ADDR_MAX_RECV_CHAN 0x0300
64#define IOP_ADDR_RECV_STATE 0x0301
65#define IOP_ADDR_ALIVE 0x031F
66#define IOP_ADDR_RECV_MSG 0x0320
67
68#ifndef __ASSEMBLY__
69
70/*
71 * IOP Control registers, staggered because in usual Apple style they were
72 * too lazy to decode the A0 bit. This structure is assumed to begin at
73 * one of the xxx_IOP_BASE addresses given above.
74 */
75
76struct mac_iop {
77 __u8 ram_addr_hi; /* shared RAM address hi byte */
78 __u8 pad0;
79 __u8 ram_addr_lo; /* shared RAM address lo byte */
80 __u8 pad1;
81 __u8 status_ctrl; /* status/control register */
82 __u8 pad2[3];
83 __u8 ram_data; /* RAM data byte at ramhi/lo */
84
85 __u8 pad3[23];
86
87 /* Bypass-mode hardware access registers */
88
89 union {
90 struct { /* SCC registers */
91 __u8 sccb_cmd; /* SCC B command reg */
92 __u8 pad4;
93 __u8 scca_cmd; /* SCC A command reg */
94 __u8 pad5;
95 __u8 sccb_data; /* SCC B data */
96 __u8 pad6;
97 __u8 scca_data; /* SCC A data */
98 } scc_regs;
99
100 struct { /* ISM registers */
101 __u8 wdata; /* write a data byte */
102 __u8 pad7;
103 __u8 wmark; /* write a mark byte */
104 __u8 pad8;
105 __u8 wcrc; /* write 2-byte crc to disk */
106 __u8 pad9;
107 __u8 wparams; /* write the param regs */
108 __u8 pad10;
109 __u8 wphase; /* write the phase states & dirs */
110 __u8 pad11;
111 __u8 wsetup; /* write the setup register */
112 __u8 pad12;
113 __u8 wzeroes; /* mode reg: 1's clr bits, 0's are x */
114 __u8 pad13;
115 __u8 wones; /* mode reg: 1's set bits, 0's are x */
116 __u8 pad14;
117 __u8 rdata; /* read a data byte */
118 __u8 pad15;
119 __u8 rmark; /* read a mark byte */
120 __u8 pad16;
121 __u8 rerror; /* read the error register */
122 __u8 pad17;
123 __u8 rparams; /* read the param regs */
124 __u8 pad18;
125 __u8 rphase; /* read the phase states & dirs */
126 __u8 pad19;
127 __u8 rsetup; /* read the setup register */
128 __u8 pad20;
129 __u8 rmode; /* read the mode register */
130 __u8 pad21;
131 __u8 rhandshake; /* read the handshake register */
132 } ism_regs;
133 } b;
134};
135
136/* This structure is used to track IOP messages in the Linux kernel */
137
138struct iop_msg {
139 struct iop_msg *next; /* next message in queue or NULL */
140 uint iop_num; /* IOP number */
141 uint channel; /* channel number */
142 void *caller_priv; /* caller private data */
143 int status; /* status of this message */
144 __u8 message[IOP_MSG_LEN]; /* the message being sent/received */
145 __u8 reply[IOP_MSG_LEN]; /* the reply to the message */
146 void (*handler)(struct iop_msg *, struct pt_regs *);
147 /* function to call when reply recvd */
148};
149
150extern int iop_scc_present,iop_ism_present;
151
152extern int iop_listen(uint, uint,
153 void (*handler)(struct iop_msg *, struct pt_regs *),
154 const char *);
155extern int iop_send_message(uint, uint, void *, uint, __u8 *,
156 void (*)(struct iop_msg *, struct pt_regs *));
157extern void iop_complete_message(struct iop_msg *);
158extern void iop_upload_code(uint, __u8 *, uint, __u16);
159extern void iop_download_code(uint, __u8 *, uint, __u16);
160extern __u8 *iop_compare_code(uint, __u8 *, uint, __u16);
161
162#endif /* __ASSEMBLY__ */
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