From 7792ab88ca300b167a6b64f48afc039da88f4d93 Mon Sep 17 00:00:00 2001
From: Stephen Clark <stephen.clark@oarcorp.com>
Date: Mon, 23 Aug 2021 12:58:47 -0500
Subject: bsps/zynqmp: Added I2C support for ZynqMP

Added I2C drivers for ZynqMP and updated build system accordingly.
---
 bsps/aarch64/xilinx-zynqmp/include/bsp.h     |  4 ++
 bsps/aarch64/xilinx-zynqmp/include/bsp/i2c.h | 64 ++++++++++++++++++++++++++++
 bsps/aarch64/xilinx-zynqmp/include/bsp/irq.h |  2 +
 bsps/aarch64/xilinx-zynqmp/start/bspstart.c  | 10 +++++
 4 files changed, 80 insertions(+)
 create mode 100644 bsps/aarch64/xilinx-zynqmp/include/bsp/i2c.h

(limited to 'bsps')

diff --git a/bsps/aarch64/xilinx-zynqmp/include/bsp.h b/bsps/aarch64/xilinx-zynqmp/include/bsp.h
index 83f2e2f4e4..6d49b9ad2a 100644
--- a/bsps/aarch64/xilinx-zynqmp/include/bsp.h
+++ b/bsps/aarch64/xilinx-zynqmp/include/bsp.h
@@ -70,6 +70,10 @@ BSP_START_TEXT_SECTION void zynqmp_setup_mmu_and_cache(void);
 
 void zynqmp_debug_console_flush(void);
 
+uint32_t zynqmp_clock_i2c0(void);
+
+uint32_t zynqmp_clock_i2c1(void);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
diff --git a/bsps/aarch64/xilinx-zynqmp/include/bsp/i2c.h b/bsps/aarch64/xilinx-zynqmp/include/bsp/i2c.h
new file mode 100644
index 0000000000..a83d9ed467
--- /dev/null
+++ b/bsps/aarch64/xilinx-zynqmp/include/bsp/i2c.h
@@ -0,0 +1,64 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2021 On-Line Applications Research (OAR)
+ * Copyright (C) 2014 embedded brains GmbH
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * 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.
+ */
+
+#ifndef LIBBSP_ARM_XILINX_ZYNQ_I2C_H
+#define LIBBSP_ARM_XILINX_ZYNQ_I2C_H
+
+#include <dev/i2c/cadence-i2c.h>
+#include <bsp/irq.h>
+#include <bsp.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+static inline int zynqmp_register_i2c_0(void)
+{
+  return i2c_bus_register_cadence(
+    "/dev/i2c-0",
+    0x00FF020000,
+    zynqmp_clock_i2c0(),
+    ZYNQMP_IRQ_I2C_0
+  );
+}
+
+static inline int zynqmp_register_i2c_1(void)
+{
+  return i2c_bus_register_cadence(
+    "/dev/i2c-1",
+    0x00FF030000,
+    zynqmp_clock_i2c1(),
+    ZYNQMP_IRQ_I2C_1
+  );
+}
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* LIBBSP_ARM_XILINX_ZYNQ_I2C_H */
diff --git a/bsps/aarch64/xilinx-zynqmp/include/bsp/irq.h b/bsps/aarch64/xilinx-zynqmp/include/bsp/irq.h
index b67d7d0f8e..9af41643bd 100644
--- a/bsps/aarch64/xilinx-zynqmp/include/bsp/irq.h
+++ b/bsps/aarch64/xilinx-zynqmp/include/bsp/irq.h
@@ -53,6 +53,8 @@ extern "C" {
 /* Interrupts vectors */
 #define BSP_TIMER_VIRT_PPI 27
 #define BSP_TIMER_PHYS_NS_PPI 30
+#define ZYNQMP_IRQ_I2C_0 49
+#define ZYNQMP_IRQ_I2C_1 50
 #define ZYNQMP_IRQ_UART_0 54
 #define ZYNQMP_IRQ_UART_1 53
 #define ZYNQMP_IRQ_ETHERNET_0 89
diff --git a/bsps/aarch64/xilinx-zynqmp/start/bspstart.c b/bsps/aarch64/xilinx-zynqmp/start/bspstart.c
index 36194a337d..d75e5a1620 100644
--- a/bsps/aarch64/xilinx-zynqmp/start/bspstart.c
+++ b/bsps/aarch64/xilinx-zynqmp/start/bspstart.c
@@ -39,6 +39,16 @@
 #include <bsp/irq-generic.h>
 #include <bsp/linker-symbols.h>
 
+__attribute__ ((weak)) uint32_t zynqmp_clock_i2c0(void)
+{
+  return ZYNQMP_CLOCK_I2C0;
+}
+
+__attribute__ ((weak)) uint32_t zynqmp_clock_i2c1(void)
+{
+  return ZYNQMP_CLOCK_I2C1;
+}
+
 void bsp_start( void )
 {
   bsp_interrupt_initialize();
-- 
cgit v1.2.3