2 * config.c - non-mmu 68360 platform initialization code
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>
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
14 #include <linux/init.h>
15 #include <linux/types.h>
16 #include <linux/kernel.h>
18 #include <linux/interrupt.h>
19 #include <linux/irq.h>
21 #include <asm/setup.h>
22 #include <asm/pgtable.h>
23 #include <asm/machdep.h>
24 #include <asm/m68360.h>
27 #include <asm/bootstd.h>
30 extern void m360_cpm_reset(void);
32 // Mask to select if the PLL prescaler is enabled.
33 #define MCU_PREEN ((unsigned short)(0x0001 << 13))
35 #if defined(CONFIG_UCQUICC)
36 #define OSCILLATOR (unsigned long int)33000000
39 static irq_handler_t timer_interrupt;
40 unsigned long int system_clock;
44 /* TODO DON"T Hard Code this */
45 /* calculate properly using the right PLL and prescaller */
46 // unsigned int system_clock = 33000000l;
47 extern unsigned long int system_clock; //In kernel setup.c
50 static irqreturn_t hw_tick(int irq, void *dummy)
55 pquicc->timer_ter1 = 0x0002; /* clear timer event */
57 return timer_interrupt(irq, dummy);
60 static struct irqaction m68360_timer_irq = {
66 void hw_timer_init(irq_handler_t handler)
68 unsigned char prescaler;
69 unsigned short tgcr_save;
72 /* Restart mode, Enable int, 32KHz, Enable timer */
73 TCTL = TCTL_OM | TCTL_IRQEN | TCTL_CLKSOURCE_32KHZ | TCTL_TEN;
74 /* Set prescaler (Divide 32KHz by 32)*/
76 /* Set compare register 32Khz / 32 / 10 = 100 */
79 request_irq(IRQ_MACHSPEC | 1, timer_routine, 0, "timer", NULL);
82 /* General purpose quicc timers: MC68360UM p7-20 */
84 /* Set up timer 1 (in [1..4]) to do 100Hz */
85 tgcr_save = pquicc->timer_tgcr & 0xfff0;
86 pquicc->timer_tgcr = tgcr_save; /* stop and reset timer 1 */
87 /* pquicc->timer_tgcr |= 0x4444; */ /* halt timers when FREEZE (ie bdm freeze) */
90 pquicc->timer_tmr1 = 0x001a | /* or=1, frr=1, iclk=01b */
91 (unsigned short)((prescaler - 1) << 8);
93 pquicc->timer_tcn1 = 0x0000; /* initial count */
94 /* calculate interval for 100Hz based on the _system_clock: */
95 pquicc->timer_trr1 = (system_clock/ prescaler) / HZ; /* reference count */
97 pquicc->timer_ter1 = 0x0003; /* clear timer events */
99 timer_interrupt = handler;
101 /* enable timer 1 interrupt in CIMR */
102 setup_irq(CPMVEC_TIMER1, &m68360_timer_irq);
105 tgcr_save = (pquicc->timer_tgcr & 0xfff0) | 0x0001;
106 pquicc->timer_tgcr = tgcr_save;
109 int BSP_set_clock_mmss(unsigned long nowtime)
112 short real_seconds = nowtime % 60, real_minutes = (nowtime / 60) % 60;
114 tod->second1 = real_seconds / 10;
115 tod->second2 = real_seconds % 10;
116 tod->minute1 = real_minutes / 10;
117 tod->minute2 = real_minutes % 10;
122 void BSP_reset (void)
126 "moveal #_start, %a0;\n"
127 "moveb #0, 0xFFFFF300;\n"
128 "moveal 0(%a0), %sp;\n"
129 "moveal 4(%a0), %a0;\n"
134 unsigned char *scc1_hwaddr;
137 #if defined (CONFIG_UCQUICC)
138 _bsc0(char *, getserialnum)
139 _bsc1(unsigned char *, gethwaddr, int, a)
140 _bsc1(char *, getbenv, char *, a)
144 void __init config_BSP(char *command, int len)
150 /* Calculate the real system clock value. */
152 unsigned int local_pllcr = (unsigned int)(pquicc->sim_pllcr);
153 if( local_pllcr & MCU_PREEN ) // If the prescaler is dividing by 128
155 int mf = (int)(pquicc->sim_pllcr & 0x0fff);
156 system_clock = (OSCILLATOR / 128) * (mf + 1);
160 int mf = (int)(pquicc->sim_pllcr & 0x0fff);
161 system_clock = (OSCILLATOR) * (mf + 1);
165 printk(KERN_INFO "\n68360 QUICC support (C) 2000 Lineo Inc.\n");
167 #if defined(CONFIG_UCQUICC) && 0
168 printk(KERN_INFO "uCquicc serial string [%s]\n",getserialnum());
169 p = scc1_hwaddr = gethwaddr(0);
170 printk(KERN_INFO "uCquicc hwaddr %.2x:%.2x:%.2x:%.2x:%.2x:%.2x\n",
171 p[0], p[1], p[2], p[3], p[4], p[5]);
173 p = getbenv("APPEND");
179 scc1_hwaddr = "\00\01\02\03\04\05";
182 mach_reset = BSP_reset;