Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/arch/arm/include/debug/msm.S b/arch/arm/include/debug/msm.S
new file mode 100644
index 000000000..b03024fa6
--- /dev/null
+++ b/arch/arm/include/debug/msm.S
@@ -0,0 +1,54 @@
+/*
+ *
+ * Copyright (C) 2007 Google, Inc.
+ * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ * Author: Brian Swetland <swetland@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+	.macro	addruart, rp, rv, tmp
+	ldr	\rp, =CONFIG_DEBUG_UART_PHYS
+	ldr	\rv, =CONFIG_DEBUG_UART_VIRT
+	.endm
+
+	.macro	senduart, rd, rx
+ARM_BE8(rev	\rd, \rd )
+	@ Write the 1 character to UARTDM_TF
+	str	\rd, [\rx, #0x70]
+	.endm
+
+	.macro	waituart, rd, rx
+	@ check for TX_EMT in UARTDM_SR
+	ldr	\rd, [\rx, #0x08]
+ARM_BE8(rev     \rd, \rd )
+	tst	\rd, #0x08
+	bne	1002f
+	@ wait for TXREADY in UARTDM_ISR
+1001:	ldr	\rd, [\rx, #0x14]
+ARM_BE8(rev     \rd, \rd )
+	tst	\rd, #0x80
+	beq 	1001b
+1002:
+	@ Clear TX_READY by writing to the UARTDM_CR register
+	mov	\rd, #0x300
+ARM_BE8(rev     \rd, \rd )
+	str	\rd, [\rx, #0x10]
+	@ Write 0x1 to NCF register
+	mov 	\rd, #0x1
+ARM_BE8(rev     \rd, \rd )
+	str	\rd, [\rx, #0x40]
+	@ UARTDM reg. Read to induce delay
+	ldr	\rd, [\rx, #0x08]
+	.endm
+
+	.macro	busyuart, rd, rx
+	.endm