ARM: OMAP2: Add common register access for 24xx and 34xx

This patch adds common register access for 24xx and 34xx power
and clock management in order to share code between 24xx and 34xx.

Only change USB platform init code to use new register access, other
access will be changed in later patches.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/include/asm-arm/arch-omap/sdrc.h b/include/asm-arm/arch-omap/sdrc.h
new file mode 100644
index 000000000000..673b3965befc
--- /dev/null
+++ b/include/asm-arm/arch-omap/sdrc.h
@@ -0,0 +1,75 @@
+#ifndef ____ASM_ARCH_SDRC_H
+#define ____ASM_ARCH_SDRC_H
+
+/*
+ * OMAP2/3 SDRC/SMS register definitions
+ *
+ * Copyright (C) 2007 Texas Instruments, Inc.
+ * Copyright (C) 2007 Nokia Corporation
+ *
+ * Written by Paul Walmsley
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <asm/arch/io.h>
+
+/* SDRC register offsets - read/write with sdrc_{read,write}_reg() */
+
+#define SDRC_SYSCONFIG          0x010
+#define SDRC_DLLA_CTRL          0x060
+#define SDRC_DLLA_STATUS        0x064
+#define SDRC_DLLB_CTRL          0x068
+#define SDRC_DLLB_STATUS        0x06C
+#define SDRC_POWER              0x070
+#define SDRC_MR_0               0x084
+#define SDRC_RFR_CTRL_0         0x0a4
+
+/*
+ * These values represent the number of memory clock cycles between
+ * autorefresh initiation.  They assume 1 refresh per 64 ms (JEDEC), 8192
+ * rows per device, and include a subtraction of a 50 cycle window in the
+ * event that the autorefresh command is delayed due to other SDRC activity.
+ * The '| 1' sets the ARE field to send one autorefresh when the autorefresh
+ * counter reaches 0.
+ *
+ * These represent optimal values for common parts, it won't work for all.
+ * As long as you scale down, most parameters are still work, they just
+ * become sub-optimal. The RFR value goes in the opposite direction. If you
+ * don't adjust it down as your clock period increases the refresh interval
+ * will not be met. Setting all parameters for complete worst case may work,
+ * but may cut memory performance by 2x. Due to errata the DLLs need to be
+ * unlocked and their value needs run time calibration. A dynamic call is
+ * need for that as no single right value exists acorss production samples.
+ *
+ * Only the FULL speed values are given. Current code is such that rate
+ * changes must be made at DPLLoutx2. The actual value adjustment for low
+ * frequency operation will be handled by omap_set_performance()
+ *
+ * By having the boot loader boot up in the fastest L4 speed available likely
+ * will result in something which you can switch between.
+ */
+#define SDRC_RFR_CTRL_165MHz    (0x00044c00 | 1)
+#define SDRC_RFR_CTRL_133MHz    (0x0003de00 | 1)
+#define SDRC_RFR_CTRL_100MHz    (0x0002da01 | 1)
+#define SDRC_RFR_CTRL_110MHz    (0x0002da01 | 1) /* Need to calc */
+#define SDRC_RFR_CTRL_BYPASS    (0x00005000 | 1) /* Need to calc */
+
+
+/*
+ * SMS register access
+ */
+
+
+#define OMAP242X_SMS_REGADDR(reg)       (void __iomem *)IO_ADDRESS(OMAP2420_SMS_BASE + reg)
+#define OMAP243X_SMS_REGADDR(reg)       (void __iomem *)IO_ADDRESS(OMAP243X_SMS_BASE + reg)
+#define OMAP343X_SMS_REGADDR(reg)       (void __iomem *)IO_ADDRESS(OMAP343X_SMS_BASE + reg)
+
+/* SMS register offsets - read/write with sms_{read,write}_reg() */
+
+#define SMS_SYSCONFIG           0x010
+/* REVISIT: fill in other SMS registers here */
+
+#endif