include/hw/timer/imx_gpt.h

   1 /*
   2  * i.MX GPT Timer
   3  *
   4  * Copyright (c) 2008 OK Labs
   5  * Copyright (c) 2011 NICTA Pty Ltd
   6  * Originally written by Hans Jiang
   7  * Updated by Peter Chubb
   8  * Updated by Jean-Christophe Dubois <jcd@tribudubois.net>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  24  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  25  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  26  * THE SOFTWARE.
  27  */
  28
  29 #ifndef IMX_GPT_H
  30 #define IMX_GPT_H
  31
  32 #include "hw/sysbus.h"
  33 #include "hw/ptimer.h"
  34 #include "hw/misc/imx_ccm.h"
  35
  36 /*
  37  * GPT : General purpose timer
  38  *
  39  * This timer counts up continuously while it is enabled, resetting itself
  40  * to 0 when it reaches GPT_TIMER_MAX (in freerun mode) or when it
  41  * reaches the value of one of the ocrX (in periodic mode).
  42  */
  43
  44 #define GPT_TIMER_MAX  0XFFFFFFFFUL
  45
  46 /* Control register.  Not all of these bits have any effect (yet) */
  47 #define GPT_CR_EN     (1 << 0)  /* GPT Enable */
  48 #define GPT_CR_ENMOD  (1 << 1)  /* GPT Enable Mode */
  49 #define GPT_CR_DBGEN  (1 << 2)  /* GPT Debug mode enable */
  50 #define GPT_CR_WAITEN (1 << 3)  /* GPT Wait Mode Enable  */
  51 #define GPT_CR_DOZEN  (1 << 4)  /* GPT Doze mode enable */
  52 #define GPT_CR_STOPEN (1 << 5)  /* GPT Stop Mode Enable */
  53 #define GPT_CR_CLKSRC_SHIFT (6)
  54 #define GPT_CR_CLKSRC_MASK  (0x7)
  55
  56 #define GPT_CR_FRR    (1 << 9)  /* Freerun or Restart */
  57 #define GPT_CR_SWR    (1 << 15) /* Software Reset */
  58 #define GPT_CR_IM1    (3 << 16) /* Input capture channel 1 mode (2 bits) */
  59 #define GPT_CR_IM2    (3 << 18) /* Input capture channel 2 mode (2 bits) */
  60 #define GPT_CR_OM1    (7 << 20) /* Output Compare Channel 1 Mode (3 bits) */
  61 #define GPT_CR_OM2    (7 << 23) /* Output Compare Channel 2 Mode (3 bits) */
  62 #define GPT_CR_OM3    (7 << 26) /* Output Compare Channel 3 Mode (3 bits) */
  63 #define GPT_CR_FO1    (1 << 29) /* Force Output Compare Channel 1 */
  64 #define GPT_CR_FO2    (1 << 30) /* Force Output Compare Channel 2 */
  65 #define GPT_CR_FO3    (1 << 31) /* Force Output Compare Channel 3 */
  66
  67 #define GPT_SR_OF1  (1 << 0)
  68 #define GPT_SR_OF2  (1 << 1)
  69 #define GPT_SR_OF3  (1 << 2)
  70 #define GPT_SR_ROV  (1 << 5)
  71
  72 #define GPT_IR_OF1IE  (1 << 0)
  73 #define GPT_IR_OF2IE  (1 << 1)
  74 #define GPT_IR_OF3IE  (1 << 2)
  75 #define GPT_IR_ROVIE  (1 << 5)
  76
  77 #define TYPE_IMX25_GPT "imx25.gpt"
  78 #define TYPE_IMX31_GPT "imx31.gpt"
  79 #define TYPE_IMX6_GPT "imx6.gpt"
  80 #define TYPE_IMX7_GPT "imx7.gpt"
  81
  82 #define TYPE_IMX_GPT TYPE_IMX25_GPT
  83
  84 #define IMX_GPT(obj) OBJECT_CHECK(IMXGPTState, (obj), TYPE_IMX_GPT)
  85
  86 typedef struct IMXGPTState{
  87     /*< private >*/
  88     SysBusDevice parent_obj;
  89
  90     /*< public >*/
  91     ptimer_state *timer;
  92     MemoryRegion  iomem;
  93     IMXCCMState  *ccm;
  94
  95     uint32_t cr;
  96     uint32_t pr;
  97     uint32_t sr;
  98     uint32_t ir;
  99     uint32_t ocr1;
 100     uint32_t ocr2;
 101     uint32_t ocr3;
 102     uint32_t icr1;
 103     uint32_t icr2;
 104     uint32_t cnt;
 105
 106     uint32_t next_timeout;
 107     uint32_t next_int;
 108
 109     uint32_t freq;
 110
 111     qemu_irq irq;
 112
 113     const IMXClk *clocks;
 114 } IMXGPTState;
 115
 116 #endif /* IMX_GPT_H */