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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 16:02:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 16:02:13 -0700
commit5d4e2d08e7fdf7339f84a1c670d296a77e02f881 (patch)
tree1c419660defa56191091dfdf50fdb57a72009173 /lib/jedec_ddr_data.c
parentfb2123fad3b499f0898835b19dbb93b18d27ee98 (diff)
parent94ca629e40eb7e997be21d8065c25e4f3797b03f (diff)
downloadlinux-5d4e2d08e7fdf7339f84a1c670d296a77e02f881.tar.gz
Merge tag 'driver-core-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg Kroah-Hartman:
 "Here's the driver core, and other driver subsystems, pull request for
  the 3.5-rc1 merge window.

  Outside of a few minor driver core changes, we ended up with the
  following different subsystem and core changes as well, due to
  interdependancies on the driver core:
   - hyperv driver updates
   - drivers/memory being created and some drivers moved into it
   - extcon driver subsystem created out of the old Android staging
     switch driver code
   - dynamic debug updates
   - printk rework, and /dev/kmsg changes

  All of this has been tested in the linux-next releases for a few weeks
  with no reported problems.

  Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"

Fix up conflicts in drivers/extcon/extcon-max8997.c where git noticed
that a patch to the deleted drivers/misc/max8997-muic.c driver needs to
be applied to this one.

* tag 'driver-core-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (90 commits)
  uio_pdrv_genirq: get irq through platform resource if not set otherwise
  memory: tegra{20,30}-mc: Remove empty *_remove()
  printk() - isolate KERN_CONT users from ordinary complete lines
  sysfs: get rid of some lockdep false positives
  Drivers: hv: util: Properly handle version negotiations.
  Drivers: hv: Get rid of an unnecessary check in vmbus_prep_negotiate_resp()
  memory: tegra{20,30}-mc: Use dev_err_ratelimited()
  driver core: Add dev_*_ratelimited() family
  Driver Core: don't oops with unregistered driver in driver_find_device()
  printk() - restore prefix/timestamp printing for multi-newline strings
  printk: add stub for prepend_timestamp()
  ARM: tegra30: Make MC optional in Kconfig
  ARM: tegra20: Make MC optional in Kconfig
  ARM: tegra30: MC: Remove unnecessary BUG*()
  ARM: tegra20: MC: Remove unnecessary BUG*()
  printk: correctly align __log_buf
  ARM: tegra30: Add Tegra Memory Controller(MC) driver
  ARM: tegra20: Add Tegra Memory Controller(MC) driver
  printk() - restore timestamp printing at console output
  printk() - do not merge continuation lines of different threads
  ...
Diffstat (limited to 'lib/jedec_ddr_data.c')
-rw-r--r--lib/jedec_ddr_data.c135
1 files changed, 135 insertions, 0 deletions
diff --git a/lib/jedec_ddr_data.c b/lib/jedec_ddr_data.c
new file mode 100644
index 000000000000..6d2cbf1d567f
--- /dev/null
+++ b/lib/jedec_ddr_data.c
@@ -0,0 +1,135 @@
+/*
+ * DDR addressing details and AC timing parameters from JEDEC specs
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Aneesh V <aneesh@ti.com>
+ *
+ * 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 <memory/jedec_ddr.h>
+#include <linux/module.h>
+
+/* LPDDR2 addressing details from JESD209-2 section 2.4 */
+const struct lpddr2_addressing
+	lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES] = {
+	{B4, T_REFI_15_6, T_RFC_90}, /* 64M */
+	{B4, T_REFI_15_6, T_RFC_90}, /* 128M */
+	{B4, T_REFI_7_8,  T_RFC_90}, /* 256M */
+	{B4, T_REFI_7_8,  T_RFC_90}, /* 512M */
+	{B8, T_REFI_7_8, T_RFC_130}, /* 1GS4 */
+	{B8, T_REFI_3_9, T_RFC_130}, /* 2GS4 */
+	{B8, T_REFI_3_9, T_RFC_130}, /* 4G */
+	{B8, T_REFI_3_9, T_RFC_210}, /* 8G */
+	{B4, T_REFI_7_8, T_RFC_130}, /* 1GS2 */
+	{B4, T_REFI_3_9, T_RFC_130}, /* 2GS2 */
+};
+EXPORT_SYMBOL_GPL(lpddr2_jedec_addressing_table);
+
+/* LPDDR2 AC timing parameters from JESD209-2 section 12 */
+const struct lpddr2_timings
+	lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES] = {
+	/* Speed bin 400(200 MHz) */
+	[0] = {
+		.max_freq	= 200000000,
+		.min_freq	= 10000000,
+		.tRPab		= 21000,
+		.tRCD		= 18000,
+		.tWR		= 15000,
+		.tRAS_min	= 42000,
+		.tRRD		= 10000,
+		.tWTR		= 10000,
+		.tXP		= 7500,
+		.tRTP		= 7500,
+		.tCKESR		= 15000,
+		.tDQSCK_max	= 5500,
+		.tFAW		= 50000,
+		.tZQCS		= 90000,
+		.tZQCL		= 360000,
+		.tZQinit	= 1000000,
+		.tRAS_max_ns	= 70000,
+		.tDQSCK_max_derated = 6000,
+	},
+	/* Speed bin 533(266 MHz) */
+	[1] = {
+		.max_freq	= 266666666,
+		.min_freq	= 10000000,
+		.tRPab		= 21000,
+		.tRCD		= 18000,
+		.tWR		= 15000,
+		.tRAS_min	= 42000,
+		.tRRD		= 10000,
+		.tWTR		= 7500,
+		.tXP		= 7500,
+		.tRTP		= 7500,
+		.tCKESR		= 15000,
+		.tDQSCK_max	= 5500,
+		.tFAW		= 50000,
+		.tZQCS		= 90000,
+		.tZQCL		= 360000,
+		.tZQinit	= 1000000,
+		.tRAS_max_ns	= 70000,
+		.tDQSCK_max_derated = 6000,
+	},
+	/* Speed bin 800(400 MHz) */
+	[2] = {
+		.max_freq	= 400000000,
+		.min_freq	= 10000000,
+		.tRPab		= 21000,
+		.tRCD		= 18000,
+		.tWR		= 15000,
+		.tRAS_min	= 42000,
+		.tRRD		= 10000,
+		.tWTR		= 7500,
+		.tXP		= 7500,
+		.tRTP		= 7500,
+		.tCKESR		= 15000,
+		.tDQSCK_max	= 5500,
+		.tFAW		= 50000,
+		.tZQCS		= 90000,
+		.tZQCL		= 360000,
+		.tZQinit	= 1000000,
+		.tRAS_max_ns	= 70000,
+		.tDQSCK_max_derated = 6000,
+	},
+	/* Speed bin 1066(533 MHz) */
+	[3] = {
+		.max_freq	= 533333333,
+		.min_freq	= 10000000,
+		.tRPab		= 21000,
+		.tRCD		= 18000,
+		.tWR		= 15000,
+		.tRAS_min	= 42000,
+		.tRRD		= 10000,
+		.tWTR		= 7500,
+		.tXP		= 7500,
+		.tRTP		= 7500,
+		.tCKESR		= 15000,
+		.tDQSCK_max	= 5500,
+		.tFAW		= 50000,
+		.tZQCS		= 90000,
+		.tZQCL		= 360000,
+		.tZQinit	= 1000000,
+		.tRAS_max_ns	= 70000,
+		.tDQSCK_max_derated = 5620,
+	},
+};
+EXPORT_SYMBOL_GPL(lpddr2_jedec_timings);
+
+const struct lpddr2_min_tck lpddr2_jedec_min_tck = {
+	.tRPab		= 3,
+	.tRCD		= 3,
+	.tWR		= 3,
+	.tRASmin	= 3,
+	.tRRD		= 2,
+	.tWTR		= 2,
+	.tXP		= 2,
+	.tRTP		= 2,
+	.tCKE		= 3,
+	.tCKESR		= 3,
+	.tFAW		= 8
+};
+EXPORT_SYMBOL_GPL(lpddr2_jedec_min_tck);