--- /dev/null
+/*
+ * arch/sh/kernel/cpu/sh5/clock-sh5.c
+ *
+ * SH-5 support for the clock framework
+ *
+ * Copyright (C) 2008 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/clock.h>
+#include <asm/io.h>
+
+static int ifc_table[] = { 2, 4, 6, 8, 10, 12, 16, 24 };
+
+/* Clock, Power and Reset Controller */
+#define CPRC_BLOCK_OFF 0x01010000
+#define CPRC_BASE (PHYS_PERIPHERAL_BLOCK + CPRC_BLOCK_OFF)
+
+static unsigned long cprc_base;
+
+static void master_clk_init(struct clk *clk)
+{
+ int idx = (ctrl_inl(cprc_base + 0x00) >> 6) & 0x0007;
+ clk->rate *= ifc_table[idx];
+}
+
+static struct clk_ops sh5_master_clk_ops = {
+ .init = master_clk_init,
+};
+
+static void module_clk_recalc(struct clk *clk)
+{
+ int idx = (ctrl_inw(cprc_base) >> 12) & 0x0007;
+ clk->rate = clk->parent->rate / ifc_table[idx];
+}
+
+static struct clk_ops sh5_module_clk_ops = {
+ .recalc = module_clk_recalc,
+};
+
+static void bus_clk_recalc(struct clk *clk)
+{
+ int idx = (ctrl_inw(cprc_base) >> 3) & 0x0007;
+ clk->rate = clk->parent->rate / ifc_table[idx];
+}
+
+static struct clk_ops sh5_bus_clk_ops = {
+ .recalc = bus_clk_recalc,
+};
+
+static void cpu_clk_recalc(struct clk *clk)
+{
+ int idx = (ctrl_inw(cprc_base) & 0x0007);
+ clk->rate = clk->parent->rate / ifc_table[idx];
+}
+
+static struct clk_ops sh5_cpu_clk_ops = {
+ .recalc = cpu_clk_recalc,
+};
+
+static struct clk_ops *sh5_clk_ops[] = {
+ &sh5_master_clk_ops,
+ &sh5_module_clk_ops,
+ &sh5_bus_clk_ops,
+ &sh5_cpu_clk_ops,
+};
+
+void __init arch_init_clk_ops(struct clk_ops **ops, int idx)
+{
+ cprc_base = onchip_remap(CPRC_BASE, 1024, "CPRC");
+ BUG_ON(!cprc_base);
+
+ if (idx < ARRAY_SIZE(sh5_clk_ops))
+ *ops = sh5_clk_ops[idx];
+}
#include <asm/processor.h>
#include <asm/uaccess.h>
#include <asm/delay.h>
+#include <asm/clock.h>
#define TMU_TOCR_INIT 0x00
#define TMU0_TCR_INIT 0x0020
#define RTC_RCR1_CIE 0x10 /* Carry Interrupt Enable */
#define RTC_RCR1 (rtc_base + 0x38)
-/* Clock, Power and Reset Controller */
-#define CPRC_BLOCK_OFF 0x01010000
-#define CPRC_BASE PHYS_PERIPHERAL_BLOCK + CPRC_BLOCK_OFF
-
-#define FRQCR (cprc_base+0x0)
-#define WTCSR (cprc_base+0x0018)
-#define STBCR (cprc_base+0x0030)
-
/* Time Management Unit */
#define TMU_BLOCK_OFF 0x01020000
#define TMU_BASE PHYS_PERIPHERAL_BLOCK + TMU_BLOCK_OFF
return IRQ_HANDLED;
}
-
-static __init unsigned int get_cpu_hz(void)
-{
- unsigned int count;
- unsigned long __dummy;
- unsigned long ctc_val_init, ctc_val;
-
- /*
- ** Regardless the toolchain, force the compiler to use the
- ** arbitrary register r3 as a clock tick counter.
- ** NOTE: r3 must be in accordance with sh64_rtc_interrupt()
- */
- register unsigned long long __rtc_irq_flag __asm__ ("r3");
-
- local_irq_enable();
- do {} while (ctrl_inb(rtc_base) != 0);
- ctrl_outb(RTC_RCR1_CIE, RTC_RCR1); /* Enable carry interrupt */
-
- /*
- * r3 is arbitrary. CDC does not support "=z".
- */
- ctc_val_init = 0xffffffff;
- ctc_val = ctc_val_init;
-
- asm volatile("gettr tr0, %1\n\t"
- "putcon %0, " __CTC "\n\t"
- "and %2, r63, %2\n\t"
- "pta $+4, tr0\n\t"
- "beq/l %2, r63, tr0\n\t"
- "ptabs %1, tr0\n\t"
- "getcon " __CTC ", %0\n\t"
- : "=r"(ctc_val), "=r" (__dummy), "=r" (__rtc_irq_flag)
- : "0" (0));
- local_irq_disable();
- /*
- * SH-3:
- * CPU clock = 4 stages * loop
- * tst rm,rm if id ex
- * bt/s 1b if id ex
- * add #1,rd if id ex
- * (if) pipe line stole
- * tst rm,rm if id ex
- * ....
- *
- *
- * SH-4:
- * CPU clock = 6 stages * loop
- * I don't know why.
- * ....
- *
- * SH-5:
- * Use CTC register to count. This approach returns the right value
- * even if the I-cache is disabled (e.g. whilst debugging.)
- *
- */
-
- count = ctc_val_init - ctc_val; /* CTC counts down */
-
- /*
- * This really is count by the number of clock cycles
- * by the ratio between a complete R64CNT
- * wrap-around (128) and CUI interrupt being raised (64).
- */
- return count*2;
-}
-
-static irqreturn_t sh64_rtc_interrupt(int irq, void *dev_id)
-{
- struct pt_regs *regs = get_irq_regs();
-
- ctrl_outb(0, RTC_RCR1); /* Disable Carry Interrupts */
- regs->regs[3] = 1; /* Using r3 */
-
- return IRQ_HANDLED;
-}
-
static struct irqaction irq0 = {
.handler = timer_interrupt,
.flags = IRQF_DISABLED,
.mask = CPU_MASK_NONE,
.name = "timer",
};
-static struct irqaction irq1 = {
- .handler = sh64_rtc_interrupt,
- .flags = IRQF_DISABLED,
- .mask = CPU_MASK_NONE,
- .name = "rtc",
-};
void __init time_init(void)
{
- unsigned int cpu_clock, master_clock, bus_clock, module_clock;
unsigned long interval;
- unsigned long frqcr, ifc, pfc;
- static int ifc_table[] = { 2, 4, 6, 8, 10, 12, 16, 24 };
-#define bfc_table ifc_table /* Same */
-#define pfc_table ifc_table /* Same */
+ struct clk *clk;
tmu_base = onchip_remap(TMU_BASE, 1024, "TMU");
if (!tmu_base) {
panic("Unable to remap RTC\n");
}
- cprc_base = onchip_remap(CPRC_BASE, 1024, "CPRC");
- if (!cprc_base) {
- panic("Unable to remap CPRC\n");
- }
+ clk = clk_get(NULL, "cpu_clk");
+ scaled_recip_ctc_ticks_per_jiffy = ((1ULL << CTC_JIFFY_SCALE_SHIFT) /
+ (unsigned long long)(clk_get_rate(clk) / HZ));
rtc_sh_get_time(&xtime);
setup_irq(TIMER_IRQ, &irq0);
- setup_irq(RTC_IRQ, &irq1);
-
- /* Check how fast it is.. */
- cpu_clock = get_cpu_hz();
-
- /* Note careful order of operations to maintain reasonable precision and avoid overflow. */
- scaled_recip_ctc_ticks_per_jiffy = ((1ULL << CTC_JIFFY_SCALE_SHIFT) / (unsigned long long)(cpu_clock / HZ));
-
- free_irq(RTC_IRQ, NULL);
-
- printk("CPU clock: %d.%02dMHz\n",
- (cpu_clock / 1000000), (cpu_clock % 1000000)/10000);
- {
- unsigned short bfc;
- frqcr = ctrl_inl(FRQCR);
- ifc = ifc_table[(frqcr>> 6) & 0x0007];
- bfc = bfc_table[(frqcr>> 3) & 0x0007];
- pfc = pfc_table[(frqcr>> 12) & 0x0007];
- master_clock = cpu_clock * ifc;
- bus_clock = master_clock/bfc;
- }
- printk("Bus clock: %d.%02dMHz\n",
- (bus_clock/1000000), (bus_clock % 1000000)/10000);
- module_clock = master_clock/pfc;
- printk("Module clock: %d.%02dMHz\n",
- (module_clock/1000000), (module_clock % 1000000)/10000);
- interval = (module_clock/(HZ*4));
+ clk = clk_get(NULL, "module_clk");
+ interval = (clk_get_rate(clk)/(HZ*4));
printk("Interval = %ld\n", interval);
- current_cpu_data.cpu_clock = cpu_clock;
- current_cpu_data.master_clock = master_clock;
- current_cpu_data.bus_clock = bus_clock;
- current_cpu_data.module_clock = module_clock;
-
/* Start TMU0 */
ctrl_outb(TMU_TSTR_OFF, TMU_TSTR);
ctrl_outb(TMU_TOCR_INIT, TMU_TOCR);
ctrl_outb(TMU_TSTR_INIT, TMU_TSTR);
}
-void enter_deep_standby(void)
-{
- /* Disable watchdog timer */
- ctrl_outl(0xa5000000, WTCSR);
- /* Configure deep standby on sleep */
- ctrl_outl(0x03, STBCR);
-
-#ifdef CONFIG_SH_ALPHANUMERIC
- {
- extern void mach_alphanum(int position, unsigned char value);
- extern void mach_alphanum_brightness(int setting);
- char halted[] = "Halted. ";
- int i;
- mach_alphanum_brightness(6); /* dimmest setting above off */
- for (i=0; i<8; i++) {
- mach_alphanum(i, halted[i]);
- }
- asm __volatile__ ("synco");
- }
-#endif
-
- asm __volatile__ ("sleep");
- asm __volatile__ ("synci");
- asm __volatile__ ("nop");
- asm __volatile__ ("nop");
- asm __volatile__ ("nop");
- asm __volatile__ ("nop");
- panic("Unexpected wakeup!\n");
-}
-
static struct resource rtc_resources[] = {
[0] = {
/* RTC base, filled in by rtc_init */
projects / linux-2.6-omap-h63xx.git / commitdiff