release/src-rt-6.x/linux/linux-2.6/arch/m68knommu/platform/5307/config.c

   1 /***************************************************************************/
   2
   3 /*
   4  *      linux/arch/m68knommu/platform/5307/config.c
   5  *
   6  *      Copyright (C) 1999-2002, Greg Ungerer (gerg@snapgear.com)
   7  *      Copyright (C) 2000, Lineo (www.lineo.com)
   8  */
   9
  10 /***************************************************************************/
  11
  12 #include <linux/kernel.h>
  13 #include <linux/sched.h>
  14 #include <linux/param.h>
  15 #include <linux/init.h>
  16 #include <linux/interrupt.h>
  17 #include <asm/irq.h>
  18 #include <asm/dma.h>
  19 #include <asm/traps.h>
  20 #include <asm/machdep.h>
  21 #include <asm/coldfire.h>
  22 #include <asm/mcftimer.h>
  23 #include <asm/mcfsim.h>
  24 #include <asm/mcfdma.h>
  25 #include <asm/mcfwdebug.h>
  26
  27 /***************************************************************************/
  28
  29 void coldfire_tick(void);
  30 void coldfire_timer_init(irq_handler_t handler);
  31 unsigned long coldfire_timer_offset(void);
  32 void coldfire_trap_init(void);
  33 void coldfire_reset(void);
  34
  35 extern unsigned int mcf_timervector;
  36 extern unsigned int mcf_profilevector;
  37 extern unsigned int mcf_timerlevel;
  38
  39 /***************************************************************************/
  40
  41 /*
  42  *      Some platforms need software versions of the GPIO data registers.
  43  */
  44 unsigned short ppdata;
  45 unsigned char ledbank = 0xff;
  46
  47 /***************************************************************************/
  48
  49 /*
  50  *      DMA channel base address table.
  51  */
  52 unsigned int   dma_base_addr[MAX_M68K_DMA_CHANNELS] = {
  53         MCF_MBAR + MCFDMA_BASE0,
  54         MCF_MBAR + MCFDMA_BASE1,
  55         MCF_MBAR + MCFDMA_BASE2,
  56         MCF_MBAR + MCFDMA_BASE3,
  57 };
  58
  59 unsigned int dma_device_address[MAX_M68K_DMA_CHANNELS];
  60
  61 /***************************************************************************/
  62
  63 void mcf_autovector(unsigned int vec)
  64 {
  65         volatile unsigned char  *mbar;
  66
  67         if ((vec >= 25) && (vec <= 31)) {
  68                 mbar = (volatile unsigned char *) MCF_MBAR;
  69                 vec = 0x1 << (vec - 24);
  70                 *(mbar + MCFSIM_AVR) |= vec;
  71                 mcf_setimr(mcf_getimr() & ~vec);
  72         }
  73 }
  74
  75 /***************************************************************************/
  76
  77 void mcf_settimericr(unsigned int timer, unsigned int level)
  78 {
  79         volatile unsigned char *icrp;
  80         unsigned int icr, imr;
  81
  82         if (timer <= 2) {
  83                 switch (timer) {
  84                 case 2:  icr = MCFSIM_TIMER2ICR; imr = MCFSIM_IMR_TIMER2; break;
  85                 default: icr = MCFSIM_TIMER1ICR; imr = MCFSIM_IMR_TIMER1; break;
  86                 }
  87
  88                 icrp = (volatile unsigned char *) (MCF_MBAR + icr);
  89                 *icrp = MCFSIM_ICR_AUTOVEC | (level << 2) | MCFSIM_ICR_PRI3;
  90                 mcf_setimr(mcf_getimr() & ~imr);
  91         }
  92 }
  93
  94 /***************************************************************************/
  95
  96 int mcf_timerirqpending(int timer)
  97 {
  98         unsigned int imr = 0;
  99
 100         switch (timer) {
 101         case 1:  imr = MCFSIM_IMR_TIMER1; break;
 102         case 2:  imr = MCFSIM_IMR_TIMER2; break;
 103         default: break;
 104         }
 105         return (mcf_getipr() & imr);
 106 }
 107
 108 /***************************************************************************/
 109
 110 void config_BSP(char *commandp, int size)
 111 {
 112         mcf_setimr(MCFSIM_IMR_MASKALL);
 113
 114 #if defined(CONFIG_BOOTPARAM)
 115         strncpy(commandp, CONFIG_BOOTPARAM_STRING, size);
 116         commandp[size-1] = 0;
 117 #elif defined(CONFIG_NETtel) || defined(CONFIG_eLIA) || \
 118       defined(CONFIG_DISKtel) || defined(CONFIG_SECUREEDGEMP3) || \
 119       defined(CONFIG_CLEOPATRA)
 120         /* Copy command line from FLASH to local buffer... */
 121         memcpy(commandp, (char *) 0xf0004000, size);
 122         commandp[size-1] = 0;
 123         /* Different timer setup - to prevent device clash */
 124         mcf_timervector = 30;
 125         mcf_profilevector = 31;
 126         mcf_timerlevel = 6;
 127 #else
 128         memset(commandp, 0, size);
 129 #endif
 130
 131         mach_sched_init = coldfire_timer_init;
 132         mach_tick = coldfire_tick;
 133         mach_gettimeoffset = coldfire_timer_offset;
 134         mach_trap_init = coldfire_trap_init;
 135         mach_reset = coldfire_reset;
 136
 137 #ifdef MCF_BDM_DISABLE
 138         /*
 139          * Disable the BDM clocking.  This also turns off most of the rest of
 140          * the BDM device.  This is good for EMC reasons. This option is not
 141          * incompatible with the memory protection option.
 142          */
 143         wdebug(MCFDEBUG_CSR, MCFDEBUG_CSR_PSTCLK);
 144 #endif
 145 }
 146
 147 /***************************************************************************/