xref: /openbmc/linux/arch/x86/include/asm/iosf_mbi.h (revision b34e08d5)
1 /*
2  * iosf_mbi.h: Intel OnChip System Fabric MailBox access support
3  */
4 
5 #ifndef IOSF_MBI_SYMS_H
6 #define IOSF_MBI_SYMS_H
7 
8 #define MBI_MCR_OFFSET		0xD0
9 #define MBI_MDR_OFFSET		0xD4
10 #define MBI_MCRX_OFFSET		0xD8
11 
12 #define MBI_RD_MASK		0xFEFFFFFF
13 #define MBI_WR_MASK		0X01000000
14 
15 #define MBI_MASK_HI		0xFFFFFF00
16 #define MBI_MASK_LO		0x000000FF
17 #define MBI_ENABLE		0xF0
18 
19 /* Baytrail available units */
20 #define BT_MBI_UNIT_AUNIT	0x00
21 #define BT_MBI_UNIT_SMC		0x01
22 #define BT_MBI_UNIT_CPU		0x02
23 #define BT_MBI_UNIT_BUNIT	0x03
24 #define BT_MBI_UNIT_PMC		0x04
25 #define BT_MBI_UNIT_GFX		0x06
26 #define BT_MBI_UNIT_SMI		0x0C
27 #define BT_MBI_UNIT_USB		0x43
28 #define BT_MBI_UNIT_SATA	0xA3
29 #define BT_MBI_UNIT_PCIE	0xA6
30 
31 /* Baytrail read/write opcodes */
32 #define BT_MBI_AUNIT_READ	0x10
33 #define BT_MBI_AUNIT_WRITE	0x11
34 #define BT_MBI_SMC_READ		0x10
35 #define BT_MBI_SMC_WRITE	0x11
36 #define BT_MBI_CPU_READ		0x10
37 #define BT_MBI_CPU_WRITE	0x11
38 #define BT_MBI_BUNIT_READ	0x10
39 #define BT_MBI_BUNIT_WRITE	0x11
40 #define BT_MBI_PMC_READ		0x06
41 #define BT_MBI_PMC_WRITE	0x07
42 #define BT_MBI_GFX_READ		0x00
43 #define BT_MBI_GFX_WRITE	0x01
44 #define BT_MBI_SMIO_READ	0x06
45 #define BT_MBI_SMIO_WRITE	0x07
46 #define BT_MBI_USB_READ		0x06
47 #define BT_MBI_USB_WRITE	0x07
48 #define BT_MBI_SATA_READ	0x00
49 #define BT_MBI_SATA_WRITE	0x01
50 #define BT_MBI_PCIE_READ	0x00
51 #define BT_MBI_PCIE_WRITE	0x01
52 
53 /**
54  * iosf_mbi_read() - MailBox Interface read command
55  * @port:	port indicating subunit being accessed
56  * @opcode:	port specific read or write opcode
57  * @offset:	register address offset
58  * @mdr:	register data to be read
59  *
60  * Locking is handled by spinlock - cannot sleep.
61  * Return: Nonzero on error
62  */
63 int iosf_mbi_read(u8 port, u8 opcode, u32 offset, u32 *mdr);
64 
65 /**
66  * iosf_mbi_write() - MailBox unmasked write command
67  * @port:	port indicating subunit being accessed
68  * @opcode:	port specific read or write opcode
69  * @offset:	register address offset
70  * @mdr:	register data to be written
71  *
72  * Locking is handled by spinlock - cannot sleep.
73  * Return: Nonzero on error
74  */
75 int iosf_mbi_write(u8 port, u8 opcode, u32 offset, u32 mdr);
76 
77 /**
78  * iosf_mbi_modify() - MailBox masked write command
79  * @port:	port indicating subunit being accessed
80  * @opcode:	port specific read or write opcode
81  * @offset:	register address offset
82  * @mdr:	register data being modified
83  * @mask:	mask indicating bits in mdr to be modified
84  *
85  * Locking is handled by spinlock - cannot sleep.
86  * Return: Nonzero on error
87  */
88 int iosf_mbi_modify(u8 port, u8 opcode, u32 offset, u32 mdr, u32 mask);
89 
90 #endif /* IOSF_MBI_SYMS_H */
91