config.c 5.1 KB

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  1. /*
  2. * linux/arch/m68knommu/platform/68360/config.c
  3. *
  4. * Copyright (c) 2000 Michael Leslie <mleslie@lineo.com>
  5. * Copyright (C) 1993 Hamish Macdonald
  6. * Copyright (C) 1999 D. Jeff Dionne <jeff@uclinux.org>
  7. *
  8. * This file is subject to the terms and conditions of the GNU General Public
  9. * License. See the file COPYING in the main directory of this archive
  10. * for more details.
  11. */
  12. #include <stdarg.h>
  13. #include <linux/types.h>
  14. #include <linux/kernel.h>
  15. #include <linux/mm.h>
  16. #include <linux/tty.h>
  17. #include <linux/console.h>
  18. #include <linux/interrupt.h>
  19. #include <linux/irq.h>
  20. #include <asm/setup.h>
  21. #include <asm/system.h>
  22. #include <asm/pgtable.h>
  23. #include <asm/machdep.h>
  24. #include <asm/m68360.h>
  25. #ifdef CONFIG_UCQUICC
  26. #include <asm/bootstd.h>
  27. #endif
  28. extern void m360_cpm_reset(void);
  29. // Mask to select if the PLL prescaler is enabled.
  30. #define MCU_PREEN ((unsigned short)(0x0001 << 13))
  31. #if defined(CONFIG_UCQUICC)
  32. #define OSCILLATOR (unsigned long int)33000000
  33. #endif
  34. unsigned long int system_clock;
  35. void M68360_init_IRQ(void);
  36. extern QUICC *pquicc;
  37. /* TODO DON"T Hard Code this */
  38. /* calculate properly using the right PLL and prescaller */
  39. // unsigned int system_clock = 33000000l;
  40. extern unsigned long int system_clock; //In kernel setup.c
  41. extern void config_M68360_irq(void);
  42. static struct irqaction m68360_timer_irq = {
  43. .name = "timer",
  44. .flags = IRQF_DISABLED | IRQF_TIMER,
  45. };
  46. void BSP_sched_init(irq_handler_t timer_routine)
  47. {
  48. unsigned char prescaler;
  49. unsigned short tgcr_save;
  50. #if 0
  51. /* Restart mode, Enable int, 32KHz, Enable timer */
  52. TCTL = TCTL_OM | TCTL_IRQEN | TCTL_CLKSOURCE_32KHZ | TCTL_TEN;
  53. /* Set prescaler (Divide 32KHz by 32)*/
  54. TPRER = 31;
  55. /* Set compare register 32Khz / 32 / 10 = 100 */
  56. TCMP = 10;
  57. request_irq(IRQ_MACHSPEC | 1, timer_routine, IRQ_FLG_LOCK, "timer", NULL);
  58. #endif
  59. /* General purpose quicc timers: MC68360UM p7-20 */
  60. /* Set up timer 1 (in [1..4]) to do 100Hz */
  61. tgcr_save = pquicc->timer_tgcr & 0xfff0;
  62. pquicc->timer_tgcr = tgcr_save; /* stop and reset timer 1 */
  63. /* pquicc->timer_tgcr |= 0x4444; */ /* halt timers when FREEZE (ie bdm freeze) */
  64. prescaler = 8;
  65. pquicc->timer_tmr1 = 0x001a | /* or=1, frr=1, iclk=01b */
  66. (unsigned short)((prescaler - 1) << 8);
  67. pquicc->timer_tcn1 = 0x0000; /* initial count */
  68. /* calculate interval for 100Hz based on the _system_clock: */
  69. pquicc->timer_trr1 = (system_clock/ prescaler) / HZ; /* reference count */
  70. pquicc->timer_ter1 = 0x0003; /* clear timer events */
  71. /* enable timer 1 interrupt in CIMR */
  72. m68360_timer_irq.handler = timer_routine;
  73. setup_irq(CPMVEC_TIMER1, &m68360_timer_irq);
  74. /* Start timer 1: */
  75. tgcr_save = (pquicc->timer_tgcr & 0xfff0) | 0x0001;
  76. pquicc->timer_tgcr = tgcr_save;
  77. }
  78. void BSP_tick(void)
  79. {
  80. /* Reset Timer1 */
  81. /* TSTAT &= 0; */
  82. pquicc->timer_ter1 = 0x0002; /* clear timer event */
  83. }
  84. unsigned long BSP_gettimeoffset (void)
  85. {
  86. return 0;
  87. }
  88. void BSP_gettod (int *yearp, int *monp, int *dayp,
  89. int *hourp, int *minp, int *secp)
  90. {
  91. }
  92. int BSP_hwclk(int op, struct rtc_time *t)
  93. {
  94. if (!op) {
  95. /* read */
  96. } else {
  97. /* write */
  98. }
  99. return 0;
  100. }
  101. int BSP_set_clock_mmss (unsigned long nowtime)
  102. {
  103. #if 0
  104. short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
  105. tod->second1 = real_seconds / 10;
  106. tod->second2 = real_seconds % 10;
  107. tod->minute1 = real_minutes / 10;
  108. tod->minute2 = real_minutes % 10;
  109. #endif
  110. return 0;
  111. }
  112. void BSP_reset (void)
  113. {
  114. local_irq_disable();
  115. asm volatile (
  116. "moveal #_start, %a0;\n"
  117. "moveb #0, 0xFFFFF300;\n"
  118. "moveal 0(%a0), %sp;\n"
  119. "moveal 4(%a0), %a0;\n"
  120. "jmp (%a0);\n"
  121. );
  122. }
  123. unsigned char *scc1_hwaddr;
  124. static int errno;
  125. #if defined (CONFIG_UCQUICC)
  126. _bsc0(char *, getserialnum)
  127. _bsc1(unsigned char *, gethwaddr, int, a)
  128. _bsc1(char *, getbenv, char *, a)
  129. #endif
  130. void config_BSP(char *command, int len)
  131. {
  132. unsigned char *p;
  133. m360_cpm_reset();
  134. /* Calculate the real system clock value. */
  135. {
  136. unsigned int local_pllcr = (unsigned int)(pquicc->sim_pllcr);
  137. if( local_pllcr & MCU_PREEN ) // If the prescaler is dividing by 128
  138. {
  139. int mf = (int)(pquicc->sim_pllcr & 0x0fff);
  140. system_clock = (OSCILLATOR / 128) * (mf + 1);
  141. }
  142. else
  143. {
  144. int mf = (int)(pquicc->sim_pllcr & 0x0fff);
  145. system_clock = (OSCILLATOR) * (mf + 1);
  146. }
  147. }
  148. printk(KERN_INFO "\n68360 QUICC support (C) 2000 Lineo Inc.\n");
  149. #if defined(CONFIG_UCQUICC) && 0
  150. printk(KERN_INFO "uCquicc serial string [%s]\n",getserialnum());
  151. p = scc1_hwaddr = gethwaddr(0);
  152. printk(KERN_INFO "uCquicc hwaddr %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
  153. p[0], p[1], p[2], p[3], p[4], p[5]);
  154. p = getbenv("APPEND");
  155. if (p)
  156. strcpy(p,command);
  157. else
  158. command[0] = 0;
  159. #else
  160. scc1_hwaddr = "\00\01\02\03\04\05";
  161. #endif
  162. mach_sched_init = BSP_sched_init;
  163. mach_tick = BSP_tick;
  164. mach_gettimeoffset = BSP_gettimeoffset;
  165. mach_gettod = BSP_gettod;
  166. mach_hwclk = NULL;
  167. mach_set_clock_mmss = NULL;
  168. mach_reset = BSP_reset;
  169. }