From 779547d708b3e0d41505e50410b73101fe418582 Mon Sep 17 00:00:00 2001
From: Yilin Sun <imi415@imi.moe>
Date: Thu, 12 Sep 2024 18:55:50 +0800
Subject: [PATCH] bsp: nxp/mcx/mcxc/mcxc444: Add SPI driver support.

Signed-off-by: Yilin Sun <imi415@imi.moe>
---
 bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.c | 122 +++++++++++++++++++
 bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.h |  11 ++
 bsp/nxp/mcx/mcxc/frdm-mcxc444/board/Kconfig  |  10 +-
 3 files changed, 140 insertions(+), 3 deletions(-)
 create mode 100644 bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.c
 create mode 100644 bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.h

diff --git a/bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.c b/bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.c
new file mode 100644
index 00000000000..7e489916af1
--- /dev/null
+++ b/bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.c
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) 2006-2024 RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-09-04     Yilin Sun    Initial version
+ */
+
+#include <rtdevice.h>
+
+#include "fsl_spi.h"
+
+#include "drv_spi.h"
+
+#define BSP_DEFAULT_SPI_FREQUENCY (500000U)
+
+typedef struct
+{
+    struct rt_spi_bus parent;
+    SPI_Type *instance;
+    uint32_t input_frequency;
+} mcx_spi_obj_t;
+
+typedef struct
+{
+    SPI_Type *instance;
+    uint8_t id;
+} mcx_spi_instance_t;
+
+static const mcx_spi_instance_t mcx_spi_instances[] =
+{
+#ifdef BSP_USING_SPI0
+    {SPI0, 0},
+#endif
+#ifdef BSP_USING_SPI1
+    {SPI1, 1},
+#endif
+};
+
+static mcx_spi_obj_t mcx_spi_list[ARRAY_SIZE(mcx_spi_instances)];
+
+static rt_ssize_t mcx_spi_xfer(struct rt_spi_device *device, struct rt_spi_message *message)
+{
+    spi_transfer_t xfer =
+    {
+        .txData = message->send_buf,
+        .rxData = message->recv_buf,
+        .dataSize = message->length,
+        .flags = 0UL,
+    };
+
+    mcx_spi_obj_t *spi = device->bus->parent.user_data;
+
+    if (message->cs_take)
+    {
+        rt_pin_write(device->cs_pin, PIN_LOW);
+    }
+
+    SPI_MasterTransferBlocking(spi->instance, &xfer);
+
+    if (message->cs_release)
+    {
+        rt_pin_write(device->cs_pin, PIN_HIGH);
+    }
+
+    return message->length;
+}
+
+static rt_err_t mcx_spi_configure(struct rt_spi_device *device, struct rt_spi_configuration *cfg)
+{
+    mcx_spi_obj_t *spi = device->bus->parent.user_data;
+
+    SPI_MasterSetBaudRate(spi->instance, cfg->max_hz, spi->input_frequency);
+
+    return RT_EOK;
+}
+
+static struct rt_spi_ops mcx_spi_ops =
+{
+    .configure = mcx_spi_configure,
+    .xfer = mcx_spi_xfer,
+};
+
+rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_uint32_t pin)
+{
+    struct rt_spi_device *spi_device = rt_malloc(sizeof(struct rt_spi_device));
+    if (!spi_device)
+    {
+        return -RT_ENOMEM;
+    }
+
+    return rt_spi_bus_attach_device_cspin(spi_device, device_name, bus_name, pin, NULL);
+}
+
+int rt_hw_spi_init(void)
+{
+    for (size_t i = 0; i < ARRAY_SIZE(mcx_spi_instances); i++)
+    {
+        char name_buf[16];
+
+        /* TODO: Initialize SPI interface here. */
+
+        mcx_spi_list[i].instance = mcx_spi_instances[i].instance;
+        mcx_spi_list[i].input_frequency = CLOCK_GetCoreSysClkFreq();
+
+        mcx_spi_list[i].parent.parent.user_data = &mcx_spi_list[i];
+
+        spi_master_config_t cfg;
+        SPI_MasterGetDefaultConfig(&cfg);
+
+        SPI_MasterInit(mcx_spi_list[i].instance, &cfg, mcx_spi_list[i].input_frequency);
+
+        rt_snprintf(name_buf, sizeof(name_buf), "spi%d", mcx_spi_instances[i].id);
+        rt_spi_bus_register(&mcx_spi_list[i].parent, name_buf, &mcx_spi_ops);
+    }
+
+    return 0;
+}
+
+INIT_DEVICE_EXPORT(rt_hw_spi_init);
diff --git a/bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.h b/bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.h
new file mode 100644
index 00000000000..b274848cb0a
--- /dev/null
+++ b/bsp/nxp/mcx/mcxc/Libraries/drivers/drv_spi.h
@@ -0,0 +1,11 @@
+#ifndef DRV_SPI_H
+#define DRV_SPI_H
+
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_uint32_t pin);
+int rt_hw_spi_init(void);
+
+#endif //DRV_SPI_H
diff --git a/bsp/nxp/mcx/mcxc/frdm-mcxc444/board/Kconfig b/bsp/nxp/mcx/mcxc/frdm-mcxc444/board/Kconfig
index c7f87bc7499..7800112a42c 100644
--- a/bsp/nxp/mcx/mcxc/frdm-mcxc444/board/Kconfig
+++ b/bsp/nxp/mcx/mcxc/frdm-mcxc444/board/Kconfig
@@ -54,12 +54,16 @@ menu "On-chip Peripheral Drivers"
             default y
 
             if BSP_USING_SPI
-                config BSP_USING_SPI1
-                    bool "Enable Flexcomm1 as SPI"
+                config BSP_USING_SPI0
+                    bool "Enable SPI0"
                     default n
-
             endif
 
+            if BSP_USING_SPI
+                config BSP_USING_SPI1
+                    bool "Enable SPI1"
+                    default n
+            endif
         
     config BSP_USING_RTC
         bool "Enable RTC"