1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * ARM timer implementation, found in Integrator, Versatile and Realview |
4 | * platforms. Not all platforms support all registers and bits in these |
5 | * registers, so we mark them with A for Integrator AP, C for Integrator |
6 | * CP, V for Versatile and R for Realview. |
7 | * |
8 | * Integrator AP has 16-bit timers, Integrator CP, Versatile and Realview |
9 | * can have 16-bit or 32-bit selectable via a bit in the control register. |
10 | * |
11 | * Every SP804 contains two identical timers. |
12 | */ |
13 | #define NR_TIMERS 2 |
14 | #define TIMER_1_BASE 0x00 |
15 | #define TIMER_2_BASE 0x20 |
16 | |
17 | #define TIMER_LOAD 0x00 /* ACVR rw */ |
18 | #define TIMER_VALUE 0x04 /* ACVR ro */ |
19 | #define TIMER_CTRL 0x08 /* ACVR rw */ |
20 | #define TIMER_CTRL_ONESHOT (1 << 0) /* CVR */ |
21 | #define TIMER_CTRL_32BIT (1 << 1) /* CVR */ |
22 | #define TIMER_CTRL_DIV1 (0 << 2) /* ACVR */ |
23 | #define TIMER_CTRL_DIV16 (1 << 2) /* ACVR */ |
24 | #define TIMER_CTRL_DIV256 (2 << 2) /* ACVR */ |
25 | #define TIMER_CTRL_IE (1 << 5) /* VR */ |
26 | #define TIMER_CTRL_PERIODIC (1 << 6) /* ACVR */ |
27 | #define TIMER_CTRL_ENABLE (1 << 7) /* ACVR */ |
28 | |
29 | #define TIMER_INTCLR 0x0c /* ACVR wo */ |
30 | #define TIMER_RIS 0x10 /* CVR ro */ |
31 | #define TIMER_MIS 0x14 /* CVR ro */ |
32 | #define TIMER_BGLOAD 0x18 /* CVR rw */ |
33 | |
34 | struct sp804_timer { |
35 | int load; |
36 | int load_h; |
37 | int value; |
38 | int value_h; |
39 | int ctrl; |
40 | int intclr; |
41 | int ris; |
42 | int mis; |
43 | int bgload; |
44 | int bgload_h; |
45 | int timer_base[NR_TIMERS]; |
46 | int width; |
47 | }; |
48 | |
49 | struct sp804_clkevt { |
50 | void __iomem *base; |
51 | void __iomem *load; |
52 | void __iomem *load_h; |
53 | void __iomem *value; |
54 | void __iomem *value_h; |
55 | void __iomem *ctrl; |
56 | void __iomem *intclr; |
57 | void __iomem *ris; |
58 | void __iomem *mis; |
59 | void __iomem *bgload; |
60 | void __iomem *bgload_h; |
61 | unsigned long reload; |
62 | int width; |
63 | }; |
64 | |