drivers/clocksource/timer-sp.h

   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 };