sc7180 platform support
Adding support for QTI CHIP SC7180 on ATF
Change-Id: I0d82d3a378036003fbd0bc4784f61464bb76ea82
Signed-off-by: Saurabh Gorecha <sgorecha@codeaurora.org>
Co-authored-by: Maulik Shah <mkshah@codeaurora.org>
diff --git a/plat/qti/common/src/aarch64/qti_uart_console.S b/plat/qti/common/src/aarch64/qti_uart_console.S
new file mode 100644
index 0000000..2eb33d9
--- /dev/null
+++ b/plat/qti/common/src/aarch64/qti_uart_console.S
@@ -0,0 +1,102 @@
+/*
+ * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018,2020 The Linux Foundation. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <asm_macros.S>
+#include <console_macros.S>
+
+#include <platform_def.h>
+#include <qti_uart_console.h>
+
+/*
+ * This driver implements console logging into a ring buffer.
+ */
+
+ .globl qti_console_uart_register
+
+ /* -----------------------------------------------
+ * int qti_console_uart_register(console_t *console,
+ * uintptr_t uart_base_addr)
+ * Registers uart console instance.
+ * In: x0 - pointer to empty console_t struct
+ * x1 - start address of uart block.
+ * Out: x0 - 1 to indicate success
+ * Clobber list: x0, x1, x14
+ * -----------------------------------------------
+ */
+func qti_console_uart_register
+ str x1, [x0, #CONSOLE_T_BASE] /* Save UART base. */
+ finish_console_register uart putc=1, flush=1
+endfunc qti_console_uart_register
+
+ /* -----------------------------------------------
+ * int qti_console_uart_puts(int c, console_t *console)
+ * Writes a character to the UART console.
+ * The character must be preserved in x0.
+ * In: x0 - character to be stored
+ * x1 - pointer to console_t struct
+ * Clobber list: x1, x2
+ * -----------------------------------------------
+ */
+func console_uart_putc
+ /* set x1 = UART base. */
+ ldr x1, [x1, #CONSOLE_T_BASE]
+
+ /* Loop until M_GENI_CMD_ACTIVE bit not clear. */
+1: ldr w2, [x1, #GENI_STATUS_REG]
+ and w2, w2, #GENI_STATUS_M_GENI_CMD_ACTIVE_MASK
+ cmp w2, #GENI_STATUS_M_GENI_CMD_ACTIVE_MASK
+ b.eq 1b
+
+ /* Transmit data. */
+ cmp w0, #0xA
+ b.ne 3f
+
+ /* Add '\r' when input char is '\n' */
+ mov w2, #0x1
+ mov w0, #0xD
+ str w2, [x1, #UART_TX_TRANS_LEN_REG]
+ mov w2, #GENI_M_CMD_TX
+ str w2, [x1, #GENI_M_CMD0_REG]
+ str w0, [x1, #GENI_TX_FIFOn_REG]
+ mov w0, #0xA
+
+ /* Loop until M_GENI_CMD_ACTIVE bit not clear. */
+2: ldr w2, [x1, #GENI_STATUS_REG]
+ and w2, w2, #GENI_STATUS_M_GENI_CMD_ACTIVE_MASK
+ cmp w2, #GENI_STATUS_M_GENI_CMD_ACTIVE_MASK
+ b.eq 2b
+
+ /* Transmit i/p data. */
+3: mov w2, #0x1
+ str w2, [x1, #UART_TX_TRANS_LEN_REG]
+ mov w2, #GENI_M_CMD_TX
+ str w2, [x1, #GENI_M_CMD0_REG]
+ str w0, [x1, #GENI_TX_FIFOn_REG]
+
+ ret
+endfunc console_uart_putc
+
+ /* -----------------------------------------------
+ * int qti_console_uart_flush(console_t *console)
+ * In: x0 - pointer to console_t struct
+ * Out: x0 - 0 for success
+ * Clobber list: x0, x1
+ * -----------------------------------------------
+ */
+func console_uart_flush
+ /* set x0 = UART base. */
+ ldr x0, [x0, #CONSOLE_T_BASE]
+
+ /* Loop until M_GENI_CMD_ACTIVE bit not clear. */
+1: ldr w1, [x0, #GENI_STATUS_REG]
+ and w1, w1, #GENI_STATUS_M_GENI_CMD_ACTIVE_MASK
+ cmp w1, #GENI_STATUS_M_GENI_CMD_ACTIVE_MASK
+ b.eq 1b
+
+ mov w0, #0
+ ret
+endfunc console_uart_flush