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authorAlexandru Gagniuc <mr.nuke.me@gmail.com>2014-01-02 01:57:53 -0500
committerAlexandru Gagniuc <mr.nuke.me@gmail.com>2014-01-09 01:03:01 +0100
commita94bed01165b7571ac186d55a45f6d53d45c48ba (patch)
treeafcf33583626234128dbac7d4506968f13202540
parentbd09dbe3300eca302b84a8fe64cb302889089ab2 (diff)
downloadcoreboot-a94bed01165b7571ac186d55a45f6d53d45c48ba.tar.xz
cpu/allwinner/a10: Add function for reading chip revision
Change-Id: Iafbd253235db3914b9382fdb41de2622ef83c6d8 Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com> Reviewed-on: http://review.coreboot.org/4596 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: David Hendricks <dhendrix@chromium.org>
-rw-r--r--src/cpu/allwinner/a10/timer.c11
-rw-r--r--src/cpu/allwinner/a10/timer.h9
2 files changed, 20 insertions, 0 deletions
diff --git a/src/cpu/allwinner/a10/timer.c b/src/cpu/allwinner/a10/timer.c
index 60cc60c4d1..7d5d1419c3 100644
--- a/src/cpu/allwinner/a10/timer.c
+++ b/src/cpu/allwinner/a10/timer.c
@@ -11,6 +11,7 @@
#include <delay.h>
#include <timer.h>
+struct a1x_timer_module *const timer_module = (void *)A1X_TIMER_BASE;
struct a1x_timer *const tmr0 =
&((struct a1x_timer_module *)A1X_TIMER_BASE)->timer[0];
@@ -53,3 +54,13 @@ void udelay(unsigned usec)
}
}
+
+/*
+ * This function has nothing to do with timers; however, the chip revision
+ * register is in the timer module, so keep this function here.
+ */
+u8 a1x_get_cpu_chip_revision(void)
+{
+ write32(0, &timer_module->cpu_cfg);
+ return (read32(&timer_module->cpu_cfg) >> 6) & 0x3;
+}
diff --git a/src/cpu/allwinner/a10/timer.h b/src/cpu/allwinner/a10/timer.h
index 9c0c0d158d..cb127530a1 100644
--- a/src/cpu/allwinner/a10/timer.h
+++ b/src/cpu/allwinner/a10/timer.h
@@ -24,6 +24,13 @@
#define TIMER_CTRL_RELOAD (1 << 1)
#define TIMER_CTRL_TMR_EN (1 << 0)
+/* Chip revision definitions (found in CPU_CFG register) */
+#define A1X_CHIP_REV_A 0x0
+#define A1X_CHIP_REV_C1 0x1
+#define A1X_CHIP_REV_C2 0x2
+#define A1X_CHIP_REV_B 0x3
+
+
/* General purpose timer */
struct a1x_timer {
u32 ctrl;
@@ -87,4 +94,6 @@ struct a1x_timer_module {
u32 cpu_cfg;
} __attribute__ ((packed));
+u8 a1x_get_cpu_chip_revision(void);
+
#endif /* CPU_ALLWINNER_A10_TIMER_H */