[LV] Current state of RTC rework.
Jan-Benedict Glaw
jbglaw at lug-owl.de
Sun Apr 9 21:48:01 CEST 2006
Hi!
This is currently in my RTC rework branch. I've still not decided how
to do the Kconfig'ury for it...
arch/vax/kernel/clock.c | 70 -------------------------------------
b/arch/vax/Kconfig | 8 ++++
b/arch/vax/kernel/Makefile | 4 +-
b/arch/vax/kernel/cpu_ka41.c | 4 +-
b/arch/vax/kernel/cpu_ka410.c | 18 +++++++++
b/arch/vax/kernel/cpu_ka42.c | 4 +-
b/arch/vax/kernel/cpu_ka43.c | 4 +-
b/arch/vax/kernel/cpu_ka46.c | 4 +-
b/arch/vax/kernel/cpu_ka48.c | 4 +-
b/arch/vax/kernel/cpu_ka49.c | 4 +-
b/arch/vax/kernel/cpu_ka52.c | 4 +-
b/arch/vax/kernel/cpu_ka55.c | 2 -
b/arch/vax/kernel/cpu_ka62.c | 16 ++++++++
b/arch/vax/kernel/cpu_ka630.c | 16 ++++++++
b/arch/vax/kernel/cpu_ka640.c | 16 ++++++++
b/arch/vax/kernel/cpu_ka650.c | 3 +
b/arch/vax/kernel/cpu_ka660.c | 3 +
b/arch/vax/kernel/cpu_vxt.c | 3 +
b/arch/vax/kernel/rtc-generic.c | 75 ++++++++++++++++++++++++++++++++++++++++
b/include/asm-vax/clock.h | 22 ++++++-----
b/include/asm-vax/mv.h | 3 -
21 files changed, 193 insertions(+), 94 deletions(-)
diff --git a/arch/vax/Kconfig b/arch/vax/Kconfig
index d62323f..45cf6a6 100644
--- a/arch/vax/Kconfig
+++ b/arch/vax/Kconfig
@@ -70,6 +70,14 @@ config CMDLINE
help
This is the command line the booting kernel will get.
+config VAX_RTC
+ bool "VAX RTC support"
+ default y
+ help
+ This enables RTC support. You'll probably want to have this.
+
+source "drivers/rtc/Kconfig"
+
config EARLY_PRINTK
bool
default y
diff --git a/arch/vax/kernel/Makefile b/arch/vax/kernel/Makefile
index d5cb600..6bdd541 100644
--- a/arch/vax/kernel/Makefile
+++ b/arch/vax/kernel/Makefile
@@ -9,7 +9,7 @@ extra-y := vmlinux.lds
obj-y := ptrace.o process.o setup.o regdump.o interrupt.o entry.o time.o \
ioprobe.o syscall.o signal.o semaphore.o vax_dev_init.o \
- init_task.o reboot.o cpu_generic.o clock.o
+ init_task.o reboot.o cpu_generic.o
obj-y += bootcons/
@@ -29,7 +29,7 @@ obj-$(CONFIG_CPU_KA660) += cpu_ka660.o
obj-$(CONFIG_CPU_VXT) += cpu_vxt.o
obj-$(CONFIG_MODULES) += module.o
+obj-$(CONFIG_VAX_RTC) += rtc-generic.o
obj-$(CONFIG_VAX_DIAG_LED) += diag_led.o
-
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
diff --git a/arch/vax/kernel/clock.c b/arch/vax/kernel/clock.c
deleted file mode 100644
index 1045629..0000000
--- a/arch/vax/kernel/clock.c
+++ /dev/null
@@ -1,70 +0,0 @@
-/* arch/vax/kernel/clock.c
- *
- * Copyright atp 2002. license: GPL
- *
- * Routines to manipulate the real time clock on VAXen.
- *
- * There are two sorts of battery backed hardware clocks. There is the
- * TODR (time of day register) found on big VAXen, and the familiar
- * Dallas CMOS clock on the desktop VAXen.
- *
- * The init routines are called through the machine vector. See
- * cpu_kaxx.c for details of that. The callers are time_init() and
- * the rtc clock driver (drivers/char/rtc.c), using macros defined
- * in asm/mc146818rtc.h.
- *
- * Prototypes for some of these functions are in asm/mc146818rtc.h
- * and some in asm/clock.h. (The ones that are used in the mv
- * initialisation are in clock.h, and the ones used in mc146818rtc.h
- * are in that file).
- *
- */
-
-#include <linux/config.h>
-#include <asm/io.h> /* For ioremap() */
-#include <asm/mtpr.h>
-#include <asm/mv.h>
-#include <asm/clock.h> /* for TODR, if anyone feels like implementing it */
-#include <asm/bus/vsbus.h>
-#include <linux/mc146818rtc.h> /* includes asm/mc146818rtc.h */
- /* - needed for offsets in debug output */
-
-
-/* this does nothing, and is a placeholder */
-void generic_clock_init(void)
-{
- printk (KERN_WARNING "No RTC used\n");
- return;
-}
-
-/* Map the ROM clock page, and put address in mv */
-void ka4x_clock_init(void)
-{
- mv->clock_base = ioremap(VSA_CLOCK_BASE, 1); /* FIXME: 1 is the wrong len! */
- printk("Mapped RTC clock page (v %p p %08x )\n", mv->clock_base,
- VSA_CLOCK_BASE);
-
- printk("RTC date is %2.2d:%2.2d:%4.4d %2.2d:%2.2d:%2.2d\n",
- CMOS_READ(RTC_DAY_OF_MONTH), CMOS_READ(RTC_MONTH),
- CMOS_READ(RTC_YEAR), CMOS_READ(RTC_HOURS),
- CMOS_READ(RTC_MINUTES), CMOS_READ(RTC_SECONDS));
-
- return;
-}
-
-unsigned char ka4x_clock_read(unsigned long offset)
-{
- if (mv->clock_base)
- return mv->clock_base[offset] >> 2;
-
- return 0;
-}
-
-void ka4x_clock_write(unsigned char val, unsigned long offset)
-{
- if (mv->clock_base)
- mv->clock_base[offset] = val << 2;
-
- return;
-}
-
diff --git a/arch/vax/kernel/cpu_ka41.c b/arch/vax/kernel/cpu_ka41.c
index 7699553..2a561e8 100644
--- a/arch/vax/kernel/cpu_ka41.c
+++ b/arch/vax/kernel/cpu_ka41.c
@@ -36,7 +36,6 @@ struct vax_mv mv_ka41 = {
.post_vm_putchar = dz11_putchar,
.post_vm_getchar = dz11_getchar,
.cpu_type_str = ka41_cpu_type_str,
- .clock_init = ka4x_clock_init,
};
static struct cpu_match __CPU_MATCH cpu_match_ka41 = {
@@ -65,6 +64,9 @@ static int __init ka41_platform_device_i
return -ENODEV;
platform_device_register (&ka41_diag_led_device);
+#ifdef CONFIG_VAX_RTC
+ vax_ds1287_rtc_register (VSA_CLOCK_BASE);
+#endif
retval = platform_device_register (&ka41_vsbus_device);
if (!retval) {
diff --git a/arch/vax/kernel/cpu_ka410.c b/arch/vax/kernel/cpu_ka410.c
index e96c1b1..f8afab4 100644
--- a/arch/vax/kernel/cpu_ka410.c
+++ b/arch/vax/kernel/cpu_ka410.c
@@ -35,7 +35,6 @@ struct vax_mv mv_ka410 = {
.post_vm_putchar = dz11_putchar,
.post_vm_getchar = dz11_getchar,
.cpu_type_str = ka410_cpu_type_str,
- .clock_init = ka4x_clock_init,
};
static struct cpu_match __CPU_MATCH cpumatch_ka410 = {
@@ -48,3 +47,20 @@ static struct cpu_match __CPU_MATCH cpum
.sidex_match = 0x00000000,
};
+static int __init
+ka410_platform_device_init (void)
+{
+ int retval = 0;
+
+ if (!is_ka410())
+ return -ENODEV;
+
+#ifdef CONFIG_VAX_RTC
+ vax_ds1287_rtc_register (VSA_CLOCK_BASE);
+#endif
+
+ return retval;
+}
+
+arch_initcall (ka410_platform_device_init);
+
diff --git a/arch/vax/kernel/cpu_ka42.c b/arch/vax/kernel/cpu_ka42.c
index eb33de3..d77c109 100644
--- a/arch/vax/kernel/cpu_ka42.c
+++ b/arch/vax/kernel/cpu_ka42.c
@@ -43,7 +43,6 @@ struct vax_mv mv_ka42 = {
.post_vm_putchar = dz11_putchar,
.post_vm_getchar = dz11_getchar,
.cpu_type_str = ka42_cpu_type_str,
- .clock_init = ka4x_clock_init,
};
static struct cpu_match __CPU_MATCH cpu_match_ka42 = {
@@ -72,6 +71,9 @@ static int __init ka42_platform_device_i
return -ENODEV;
platform_device_register(&ka42_diag_led_device);
+#ifdef CONFIG_VAX_RTC
+ vax_ds1287_rtc_register (VSA_CLOCK_BASE);
+#endif
retval = platform_device_register(&ka42_vsbus_device);
if (!retval) {
diff --git a/arch/vax/kernel/cpu_ka43.c b/arch/vax/kernel/cpu_ka43.c
index e06d5de..bcc96c4 100644
--- a/arch/vax/kernel/cpu_ka43.c
+++ b/arch/vax/kernel/cpu_ka43.c
@@ -223,7 +223,6 @@ struct vax_mv mv_ka43 = {
.post_vm_getchar = dz11_getchar,
.mcheck = ka43_mcheck,
.cpu_type_str = ka43_cpu_type_str,
- .clock_init = ka4x_clock_init,
};
static struct cpu_match __CPU_MATCH cpumatch_ka43 = {
@@ -251,6 +250,9 @@ static int __init ka43_platform_device_i
return -ENODEV;
platform_device_register(&ka43_diag_led_device);
+#ifdef CONFIG_VAX_RTC
+ vax_ds1287_rtc_register (VSA_CLOCK_BASE);
+#endif
retval = platform_device_register(&ka43_vsbus_device);
if (!retval) {
diff --git a/arch/vax/kernel/cpu_ka46.c b/arch/vax/kernel/cpu_ka46.c
index c85e0ba..d9faf33 100644
--- a/arch/vax/kernel/cpu_ka46.c
+++ b/arch/vax/kernel/cpu_ka46.c
@@ -128,7 +128,6 @@ struct vax_mv mv_ka46 = {
.post_vm_getchar = dz11_getchar,
.init_devices = ka46_init_devices,
.cpu_type_str = ka46_cpu_type_str,
- .clock_init = ka4x_clock_init,
};
static struct cpu_match __CPU_MATCH cpumatch_ka46 = {
@@ -156,6 +155,9 @@ static int __init ka46_platform_device_i
return -ENODEV;
platform_device_register(&ka46_diag_led_device);
+#ifdef CONFIG_VAX_RTC
+ vax_ds1287_rtc_register (VSA_CLOCK_BASE);
+#endif
retval = platform_device_register(&ka46_vsbus_device);
if (!retval) {
diff --git a/arch/vax/kernel/cpu_ka48.c b/arch/vax/kernel/cpu_ka48.c
index 39c6779..f72b1f0 100644
--- a/arch/vax/kernel/cpu_ka48.c
+++ b/arch/vax/kernel/cpu_ka48.c
@@ -124,7 +124,6 @@ struct vax_mv mv_ka48 = {
.post_vm_getchar = dz11_getchar,
.init_devices = ka48_init_devices,
.cpu_type_str = ka48_cpu_type_str,
- .clock_init = ka4x_clock_init,
};
static struct cpu_match __CPU_MATCH cpumatch_ka48 = {
@@ -147,6 +146,9 @@ static int __init ka48_platform_device_i
if (!is_ka48())
return -ENODEV;
+#ifdef CONFIG_VAX_RTC
+ vax_ds1287_rtc_register (VSA_CLOCK_BASE);
+#endif
retval = platform_device_register(&ka48_vsbus_device);
if (!retval) {
vsbus_add_fixed_device(&ka48_vsbus_device.dev, "lance", 0x200e0000, 1);
diff --git a/arch/vax/kernel/cpu_ka49.c b/arch/vax/kernel/cpu_ka49.c
index fd3e159..e7fc41e 100644
--- a/arch/vax/kernel/cpu_ka49.c
+++ b/arch/vax/kernel/cpu_ka49.c
@@ -134,7 +134,6 @@ struct vax_mv mv_ka49 = {
.post_vm_getchar = dz11_getchar,
.init_devices = ka49_init_devices,
.cpu_type_str = ka49_cpu_type_str,
- .clock_init = ka4x_clock_init,
.nicr_required = 1,
};
@@ -164,6 +163,9 @@ static int __init ka49_platform_device_i
return -ENODEV;
platform_device_register (&ka49_diag_led_device);
+#ifdef CONFIG_VAX_RTC
+ vax_ds1287_rtc_register (VSA_CLOCK_BASE);
+#endif
retval = platform_device_register (&ka49_vsbus_device);
if (!retval) {
diff --git a/arch/vax/kernel/cpu_ka52.c b/arch/vax/kernel/cpu_ka52.c
index 080b517..a428f40 100644
--- a/arch/vax/kernel/cpu_ka52.c
+++ b/arch/vax/kernel/cpu_ka52.c
@@ -62,7 +62,6 @@ struct vax_mv mv_ka52 = {
.post_vm_putchar = ka46_48_49_prom_putchar /*ka52_postvm_putchar*/,
.post_vm_getchar = dz11_getchar,
.cpu_type_str = ka52_cpu_type_str,
- //.clock_init = ka4x_clock_init,
.mcheck = ka52_mcheck,
.nicr_required = 1,
};
@@ -92,6 +91,9 @@ static int __init ka52_platform_device_i
return -ENODEV;
platform_device_register (&ka52_diag_led_device);
+#ifdef CONFIG_VAX_RTC
+ vax_no_rtc_register (); /* FIXME: RTC available? */
+#endif
retval = platform_device_register (&ka52_vsbus_device);
if (!retval) {
diff --git a/arch/vax/kernel/cpu_ka55.c b/arch/vax/kernel/cpu_ka55.c
index 931221f..82e3559 100644
--- a/arch/vax/kernel/cpu_ka55.c
+++ b/arch/vax/kernel/cpu_ka55.c
@@ -62,6 +62,6 @@ struct vax_mv mv_ka55 = {
};
#warning "KA55 needs a struct cpumatch"
-
#warning "KA55 needs a platform_device_init function"
+#warning "Needs a RTC"
diff --git a/arch/vax/kernel/cpu_ka62.c b/arch/vax/kernel/cpu_ka62.c
index 7326186..8876eb4 100644
--- a/arch/vax/kernel/cpu_ka62.c
+++ b/arch/vax/kernel/cpu_ka62.c
@@ -30,3 +30,19 @@ static struct cpu_match __CPU_MATCH cpum
.sidex_addr = 0,
};
+static int __init ka62_platform_device_init(void)
+{
+ int retval = 0;
+
+ if (!is_ka62 ())
+ return -ENODEV;
+
+#ifdef CONFIG_VAX_RTC
+ vax_no_rtc_register (); /* FIXME: RTC available? */
+#endif
+
+ return retval;
+}
+
+arch_initcall (ka62_platform_device_init);
+
diff --git a/arch/vax/kernel/cpu_ka630.c b/arch/vax/kernel/cpu_ka630.c
index a28b608..03ee05e 100644
--- a/arch/vax/kernel/cpu_ka630.c
+++ b/arch/vax/kernel/cpu_ka630.c
@@ -46,3 +46,19 @@ static struct cpu_match __CPU_MATCH cpum
.sidex_match = 0x00000000,
};
+static int __init ka630_platform_device_init(void)
+{
+ int retval = 0;
+
+ if (!is_ka630 ())
+ return -ENODEV;
+
+#ifdef CONFIG_VAX_RTC
+ vax_no_rtc_register (); /* FIXME: RTC available? */
+#endif
+
+ return retval;
+}
+
+arch_initcall (ka630_platform_device_init);
+
diff --git a/arch/vax/kernel/cpu_ka640.c b/arch/vax/kernel/cpu_ka640.c
index fed0bed..5c50552 100644
--- a/arch/vax/kernel/cpu_ka640.c
+++ b/arch/vax/kernel/cpu_ka640.c
@@ -61,3 +61,19 @@ static struct cpu_match __CPU_MATCH cpum
(CVAX_Q22_SUBTYPE_KA640 << CVAX_Q22_SUBTYPE_SHIFT),
};
+static int __init ka640_platform_device_init(void)
+{
+ int retval = 0;
+
+ if (!is_ka630 ())
+ return -ENODEV;
+
+#ifdef CONFIG_VAX_RTC
+ vax_no_rtc_register (); /* FIXME: RTC available? */
+#endif
+
+ return retval;
+}
+
+arch_initcall (ka640_platform_device_init);
+
diff --git a/arch/vax/kernel/cpu_ka650.c b/arch/vax/kernel/cpu_ka650.c
index 636f828..d78ccc6 100644
--- a/arch/vax/kernel/cpu_ka650.c
+++ b/arch/vax/kernel/cpu_ka650.c
@@ -119,6 +119,9 @@ static int __init ka650_platform_device_
platform_device_register(&ka650_cqbic_device);
platform_device_register(&ka650_iprcons_device);
platform_device_register(&ka650_diag_led_device);
+#ifdef CONFIG_VAX_RTC
+ vax_no_rtc_register (); /* FIXME: RTC available? */
+#endif
return 0;
}
diff --git a/arch/vax/kernel/cpu_ka660.c b/arch/vax/kernel/cpu_ka660.c
index 8428b33..d3db1e1 100644
--- a/arch/vax/kernel/cpu_ka660.c
+++ b/arch/vax/kernel/cpu_ka660.c
@@ -61,6 +61,9 @@ static int __init ka660_platform_device_
platform_device_register(&ka660_cqbic_device);
platform_device_register(&ka660_iprcons_device);
+#ifdef CONFIG_VAX_RTC
+ vax_no_rtc_register (); /* FIXME: RTC available? */
+#endif
return 0;
}
diff --git a/arch/vax/kernel/cpu_vxt.c b/arch/vax/kernel/cpu_vxt.c
index 7f3ef13..8a7c10d 100644
--- a/arch/vax/kernel/cpu_vxt.c
+++ b/arch/vax/kernel/cpu_vxt.c
@@ -68,6 +68,9 @@ static int __init vxt_platform_device_in
return -ENODEV;
platform_device_register (&vxt_diag_led_device);
+#ifdef CONFIG_VAX_RTC
+ vax_no_rtc_register (); /* FIXME: RTC available? */
+#endif
return 0;
}
diff --git a/arch/vax/kernel/rtc-generic.c b/arch/vax/kernel/rtc-generic.c
new file mode 100644
index 0000000..8256664
--- /dev/null
+++ b/arch/vax/kernel/rtc-generic.c
@@ -0,0 +1,75 @@
+/*
+ * Support functions for VAX RTC access. Used by all cpu_xxx.c files.
+ */
+
+#include <linux/m48t86.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+/********************************************************************/
+/* Internal memory access helpers */
+/********************************************************************/
+/*
+ * Normal bus I/O. One byte (in the low byte) per longword. All data starts
+ * at bit #2, so we need to shift out the lower two bits.
+ */
+static volatile uint32_t __iomem *vax_rtc_io_base = NULL;
+
+static unsigned char
+vax_rtc_bus_io_readb (unsigned long addr)
+{
+ unsigned char ret = 0;
+
+ if (vax_rtc_io_base)
+ ret = (vax_rtc_io_base[addr] >> 2) & 0xff;
+
+ printk (KERN_INFO "rtc_read: 0x%08lx --> %02x\n", (unsigned long) &vax_rtc_io_base[addr], ret);
+
+ return ret;
+}
+
+static void
+vax_rtc_bus_io_writeb (unsigned char value, unsigned long addr)
+{
+ printk (KERN_INFO "rtc_write: 0x%02x --> 0x%08lx\n", value, (unsigned long) &vax_rtc_io_base[addr]);
+
+ if (vax_rtc_io_base)
+ vax_rtc_io_base[addr] = value << 2;
+}
+
+static struct m48t86_ops vax_rtc_bus_io_ops = {
+ .readb = vax_rtc_bus_io_readb,
+ .writeb = vax_rtc_bus_io_writeb,
+};
+
+
+/********************************************************************/
+/* RTC-specific registration data */
+/********************************************************************/
+static struct platform_device vax_ds1287_rtc_platform_device = {
+ .name = "rtc-m48t86",
+ .id = -1,
+ .dev = {
+ .platform_data = &vax_rtc_bus_io_ops,
+ },
+ .num_resources = 0,
+};
+
+/********************************************************************/
+/* External interface for use in cpu_xxx.c files */
+/********************************************************************/
+int
+vax_ds1287_rtc_register (unsigned long phys_addr)
+{
+ vax_rtc_io_base = ioremap (phys_addr, 60 * 4); /* 60 I/O bytes of RTC, one per longword. */
+ return platform_device_register (&vax_ds1287_rtc_platform_device);
+}
+
+void
+vax_no_rtc_register (void)
+{
+ printk (KERN_ERR "Warning: There is no RTC defined for your CPU.\n");
+ printk (KERN_ERR "Please report to the VAX-Linux Mailing List at "
+ "<linux-vax at pergamentum.com>\n");
+}
+
diff --git a/include/asm-vax/clock.h b/include/asm-vax/clock.h
index 83f0e0c..3aa896f 100644
--- a/include/asm-vax/clock.h
+++ b/include/asm-vax/clock.h
@@ -6,20 +6,22 @@
* Definitions for VAX clocks (interval counter and time-of-day)
*/
-/* structure of ICCS register (Interval Clock Control and Status) */
+/* Structure of ICCS register (Interval Clock Control and Status) */
-#define ICCS_ERROR (0x80000000) /* counter overflowed, INTERRUPT
+#define ICCS_ERROR 0x80000000 /* Counter overflowed, INTERRUPT
already set, write 1 to clear */
-#define ICCS_INTERRUPT (0x00000080) /* Set when ICR overflows, write 1
+#define ICCS_INTERRUPT 0x00000080 /* Set when ICR overflows, write 1
to clear */
-#define ICCS_TRANSFER (0x00000040) /* Copy NICR to ICR */
-#define ICCS_SINGLESTEP (0x00000020) /* increment Interval Count Register
+#define ICCS_TRANSFER 0x00000040 /* Copy NICR to ICR */
+#define ICCS_SINGLESTEP 0x00000020 /* Increment Interval Count Register
(ICR) by one, only if RUN is 0 */
-#define ICCS_INTENABLE (0x00000010) /* enable clock interrupts */
-#define ICCS_RUN (0x00000001) /* enable counter */
+#define ICCS_INTENABLE 0x00000010 /* Enable clock interrupts */
+#define ICCS_RUN 0x00000001 /* Enable counter */
-/* prototypes for clock handling functions in arch/vax/clock.c */
-void generic_clock_init(void);
-void ka4x_clock_init(void);
+
+/* Prototypes for RTC register functions in ./arch/vax/rtc-generic.c */
+
+extern int vax_ds1287_rtc_register (unsigned long base_address);
+extern void vax_no_rtc_register (void);
#endif /* _VAX_CLOCK_H_ */
diff --git a/include/asm-vax/mv.h b/include/asm-vax/mv.h
index 6bdcd28..983ac38 100644
--- a/include/asm-vax/mv.h
+++ b/include/asm-vax/mv.h
@@ -40,9 +40,6 @@ struct vax_mv {
const char * (*cpu_type_str)(void);
- void (*clock_init)(void); /* Called by time_init() to set up RTC */
- unsigned int *clock_base; /* Address of clock page for vsbus RTC */
-
unsigned int sidex; /* If not available, it's set to 0 */
/* Flags for very CPU-specific features */
--
Jan-Benedict Glaw jbglaw at lug-owl.de . +49-172-7608481 _ O _
"Eine Freie Meinung in einem Freien Kopf | Gegen Zensur | Gegen Krieg _ _ O
für einen Freien Staat voll Freier Bürger" | im Internet! | im Irak! O O O
ret = do_actions((curr | FREE_SPEECH) & ~(NEW_COPYRIGHT_LAW | DRM | TCPA));
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