libpayload: ipq40xx: Introduce timer and uart driver

BUG=chrome-os-partner:49249
TEST=None. Initial code not sure if it will even compile
BRANCH=none

Change-Id: Ibf2c91be93e2567cc1262b6fb84461eef51ab3e0
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: b87157138302b017e64a28417a22421c880c1bcb
Original-Change-Id: I16a8324d3c8ef4ee729f4509fda5bfe703b24ce4
Original-Signed-off-by: Varadarajan Narayanan <varada@codeaurora.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/333304
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://review.coreboot.org/14656
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/payloads/libpayload/drivers/timer/ipq40xx.c b/payloads/libpayload/drivers/timer/ipq40xx.c
new file mode 100644
index 0000000000..0ca260047e
--- /dev/null
+++ b/payloads/libpayload/drivers/timer/ipq40xx.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2015, 2016, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <libpayload.h>
+
+#define GCNT_FREQ_MHZ		48
+
+#define MSM_TMR_BASE		((void *)0x004a1000u)
+#define GCNT_CNTCV_LO		(MSM_TMR_BASE + 0x1000)
+#define GCNT_CNTCV_HI		(MSM_TMR_BASE + 0x1004)
+
+uint64_t timer_hz(void)
+{
+	return GCNT_FREQ_MHZ * 1000 * 1000;
+}
+
+uint64_t timer_raw_value(void)
+{
+	uint32_t hi, lo;
+
+	do {
+		hi = read32(GCNT_CNTCV_HI);
+		lo = read32(GCNT_CNTCV_LO);
+	} while (hi != read32(GCNT_CNTCV_HI));
+
+	return ((((uint64_t)hi) << 32) | lo);
+}