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path: root/drivers/clocksource/cyclone.c
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Diffstat (limited to 'drivers/clocksource/cyclone.c')
-rw-r--r--drivers/clocksource/cyclone.c113
1 files changed, 0 insertions, 113 deletions
diff --git a/drivers/clocksource/cyclone.c b/drivers/clocksource/cyclone.c
deleted file mode 100644
index 9e0998f2288..00000000000
--- a/drivers/clocksource/cyclone.c
+++ /dev/null
@@ -1,113 +0,0 @@
-#include <linux/clocksource.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/timex.h>
-#include <linux/init.h>
-
-#include <asm/pgtable.h>
-#include <asm/io.h>
-
-#include <asm/mach_timer.h>
-
-#define CYCLONE_CBAR_ADDR 0xFEB00CD0 /* base address ptr */
-#define CYCLONE_PMCC_OFFSET 0x51A0 /* offset to control register */
-#define CYCLONE_MPCS_OFFSET 0x51A8 /* offset to select register */
-#define CYCLONE_MPMC_OFFSET 0x51D0 /* offset to count register */
-#define CYCLONE_TIMER_FREQ 99780000 /* 100Mhz, but not really */
-#define CYCLONE_TIMER_MASK CLOCKSOURCE_MASK(32) /* 32 bit mask */
-
-int use_cyclone = 0;
-static void __iomem *cyclone_ptr;
-
-static cycle_t read_cyclone(struct clocksource *cs)
-{
- return (cycle_t)readl(cyclone_ptr);
-}
-
-static struct clocksource clocksource_cyclone = {
- .name = "cyclone",
- .rating = 250,
- .read = read_cyclone,
- .mask = CYCLONE_TIMER_MASK,
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static int __init init_cyclone_clocksource(void)
-{
- unsigned long base; /* saved value from CBAR */
- unsigned long offset;
- u32 __iomem* volatile cyclone_timer; /* Cyclone MPMC0 register */
- u32 __iomem* reg;
- int i;
-
- /* make sure we're on a summit box: */
- if (!use_cyclone)
- return -ENODEV;
-
- printk(KERN_INFO "Summit chipset: Starting Cyclone Counter.\n");
-
- /* find base address: */
- offset = CYCLONE_CBAR_ADDR;
- reg = ioremap_nocache(offset, sizeof(reg));
- if (!reg) {
- printk(KERN_ERR "Summit chipset: Could not find valid CBAR register.\n");
- return -ENODEV;
- }
- /* even on 64bit systems, this is only 32bits: */
- base = readl(reg);
- iounmap(reg);
- if (!base) {
- printk(KERN_ERR "Summit chipset: Could not find valid CBAR value.\n");
- return -ENODEV;
- }
-
- /* setup PMCC: */
- offset = base + CYCLONE_PMCC_OFFSET;
- reg = ioremap_nocache(offset, sizeof(reg));
- if (!reg) {
- printk(KERN_ERR "Summit chipset: Could not find valid PMCC register.\n");
- return -ENODEV;
- }
- writel(0x00000001,reg);
- iounmap(reg);
-
- /* setup MPCS: */
- offset = base + CYCLONE_MPCS_OFFSET;
- reg = ioremap_nocache(offset, sizeof(reg));
- if (!reg) {
- printk(KERN_ERR "Summit chipset: Could not find valid MPCS register.\n");
- return -ENODEV;
- }
- writel(0x00000001,reg);
- iounmap(reg);
-
- /* map in cyclone_timer: */
- offset = base + CYCLONE_MPMC_OFFSET;
- cyclone_timer = ioremap_nocache(offset, sizeof(u64));
- if (!cyclone_timer) {
- printk(KERN_ERR "Summit chipset: Could not find valid MPMC register.\n");
- return -ENODEV;
- }
-
- /* quick test to make sure its ticking: */
- for (i = 0; i < 3; i++){
- u32 old = readl(cyclone_timer);
- int stall = 100;
-
- while (stall--)
- barrier();
-
- if (readl(cyclone_timer) == old) {
- printk(KERN_ERR "Summit chipset: Counter not counting! DISABLED\n");
- iounmap(cyclone_timer);
- cyclone_timer = NULL;
- return -ENODEV;
- }
- }
- cyclone_ptr = cyclone_timer;
-
- return clocksource_register_hz(&clocksource_cyclone,
- CYCLONE_TIMER_FREQ);
-}
-
-arch_initcall(init_cyclone_clocksource);