[nxp/mcxn] add SPI6 support (#8704)

* [bsp][nxp] add missing drv_spi.h

Otherwise when building spi users such as u8g2, gcc will complain can't
find the drv_spi.h.

* [bsp][nxp] enable spi6

* [bsp][nxp] add spi sample code which uses spi6 to loopback

Connect spi6's MISO <--> MSIO, I.E P3_20 and P3_22 with Dupont Line
The sample usage and output would be:

msh >spi_sample
spi rbuf : 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f

spi loopback mode test over!

bsp/nxp/mcx/mcxn/Libraries/drivers/drv_spi.c

@@ -20,6 +20,11 @@ enum
 #ifdef BSP_USING_SPI3
     SPI3_INDEX,
 #endif
+
+#ifdef BSP_USING_SPI6
+    SPI6_INDEX,
+#endif
+
 #ifdef BSP_USING_SPI7
     SPI7_INDEX,
 #endif
@@ -63,7 +68,20 @@ static struct lpc_spi lpc_obj[] =
             .rx_dma_chl = 3,
             .name = "spi3",
         },
-#endif
+#endif /* BSP_USING_SPI3 */
+#ifdef BSP_USING_SPI6
+        {
+            .LPSPIx = LPSPI6,
+            .clock_attach_id = kFRO_HF_DIV_to_FLEXCOMM6,
+            .clock_div_name = kCLOCK_DivFlexcom6Clk,
+            .clock_name = kCLOCK_FroHf,
+            .tx_dma_request = kDmaRequestMuxLpFlexcomm6Tx,
+            .rx_dma_request = kDmaRequestMuxLpFlexcomm6Rx,
+            .DMAx = DMA0,
+            .tx_dma_chl = 4,
+            .rx_dma_chl = 5,
+            .name = "spi6",
+#endif /* BSP_USING_SPI6 */
 #ifdef BSP_USING_SPI7
         {
             .LPSPIx = LPSPI7,
@@ -77,7 +95,7 @@ static struct lpc_spi lpc_obj[] =
             .rx_dma_chl = 3,
             .name = "spi7",
         },
-#endif
+#endif /* BSP_USING_SPI7 */
 };
 
 
@@ -146,7 +164,7 @@ static rt_ssize_t spixfer(struct rt_spi_device *device, struct rt_spi_message *m
   //  if(message->length < MAX_DMA_TRANSFER_SIZE)
     if(0)
     {
-      //  SPI_MasterTransferBlocking(spi->SPIx, &transfer);
+        LPSPI_MasterTransferBlocking(spi->LPSPIx, &transfer);
     }
     else
     {

bsp/nxp/mcx/mcxn/Libraries/drivers/drv_spi.h

@@ -0,0 +1,18 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author          Notes
+ * 2024-03-22     Jisheng Zhang   The first version for mcxn
+ */
+
+#ifndef __DRV_SPI_H__
+#define __DRV_SPI_H__
+
+#include <rtdevice.h>
+
+rt_err_t rt_hw_spi_device_attach(const char *bus_name, const char *device_name, rt_base_t cs_pin);
+
+#endif /*__DRV_SPI_H__ */

bsp/nxp/mcx/mcxn/frdm-mcxn947/board/Kconfig

@@ -64,6 +64,15 @@ menu "On-chip Peripheral Drivers"
                     bool "Enable Flexcomm3 as SPI"
                     default n
 
+                config BSP_USING_SPI6
+                    bool "Enable Flexcomm6 as SPI"
+                    default n
+                    if BSP_USING_SPI6
+                        config BSP_USING_SPI6_SAMPLE
+                            bool "Enable SPI6 BUS Sample"
+                            default n
+                    endif
+
                 config BSP_USING_SPI7
                     bool "Enable Flexcomm7 as SPI"
                     default n

bsp/nxp/mcx/mcxn/frdm-mcxn947/board/MCUX_Config/board/pin_mux.c

@@ -99,8 +99,12 @@ void BOARD_InitBootPins(void)
     PORT2->PCR[6]   = PORT_PCR_MUX(3) | PORT_PCR_PE(1) | PORT_PCR_PS(1) | PORT_PCR_IBE(1);   /* SDHC0_D3 */
     PORT2->PCR[7]   = PORT_PCR_MUX(3) | PORT_PCR_PE(1) | PORT_PCR_PS(1) | PORT_PCR_IBE(1);   /* SDHC0_D2 */
 
-    PORT3->PCR[20]   = PORT_PCR_MUX(3) | PORT_PCR_PS(0) | PORT_PCR_IBE(1);     /* FC6_P0 */
-    PORT3->PCR[21]   = PORT_PCR_MUX(3) | PORT_PCR_PS(0) | PORT_PCR_IBE(1);     /* FC6_P1 */
+    /* mikroBUS SPI6 */
+    PORT3->PCR[20]   = PORT_PCR_MUX(3) | PORT_PCR_PS(0) | PORT_PCR_PE(0) | PORT_PCR_IBE(1);     /* FC6_P0 SDO/D[0], FC6_SPI_MOSI */
+    PORT3->PCR[21]   = PORT_PCR_MUX(3) | PORT_PCR_PS(0) | PORT_PCR_PE(0) | PORT_PCR_IBE(1);     /* FC6_P1 SCK, FC6_SPI_CLK */
+    PORT3->PCR[22]   = PORT_PCR_MUX(3) | PORT_PCR_PS(0) | PORT_PCR_PE(0) | PORT_PCR_IBE(1);     /* FC6_P2 SDI/D[1], FC3_SPI_MISO */
+    PORT3->PCR[23]   = PORT_PCR_MUX(0) | PORT_PCR_PS(0) | PORT_PCR_PE(0) | PORT_PCR_IBE(1);     /* CS */
+
 
 //    PORT1->PCR[20]   = PORT_PCR_MUX(3) | PORT_PCR_PS(0) | PORT_PCR_PE(0) | PORT_PCR_IBE(1);     /* FC4_0 */
 //    PORT1->PCR[21]   = PORT_PCR_MUX(3) | PORT_PCR_PS(0) | PORT_PCR_PE(0) | PORT_PCR_IBE(1);     /* FC4_1 */

bsp/nxp/mcx/mcxn/frdm-mcxn947/board/SConscript

@@ -9,6 +9,9 @@ MCUX_Config/board/clock_config.c
 MCUX_Config/board/pin_mux.c
 """)
 
+if GetDepend(['BSP_USING_SPI6_SAMPLE']):
+    src += Glob('ports/spi_sample.c')
+
 CPPPATH = [cwd, cwd + '/MCUX_Config/board']
 CPPDEFINES = ['DEBUG', 'CPU_MCXN947VDF_cm33_core0']
 

bsp/nxp/mcx/mcxn/frdm-mcxn947/board/ports/spi_sample.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-07-19     Rbbb666      first version
+ * 2024-03-30     xhackerustc  2nd version for FRDM-MCXN947
+ */
+
+#include "board.h"
+
+#include <drv_spi.h>
+
+#define SPI_NAME     "spi60"
+#define CS_PIN       (3*32+23)
+static struct rt_spi_device *spi_dev;
+
+/* attach spi device */
+static int rt_spi_device_init(void)
+{
+    struct rt_spi_configuration cfg;
+
+    rt_hw_spi_device_attach("spi6", SPI_NAME, CS_PIN);
+
+    cfg.data_width = 8;
+    cfg.mode   = RT_SPI_MASTER | RT_SPI_MODE_0 | RT_SPI_MSB | RT_SPI_NO_CS;
+    cfg.max_hz = 1 *1000 *1000;
+
+    spi_dev = (struct rt_spi_device *)rt_device_find(SPI_NAME);
+
+    if (RT_NULL == spi_dev)
+    {
+        rt_kprintf("spi sample run failed! can't find %s device!\n", SPI_NAME);
+        return -RT_ERROR;
+    }
+
+    rt_spi_configure(spi_dev, &cfg);
+
+    return RT_EOK;
+}
+INIT_APP_EXPORT(rt_spi_device_init);
+
+/* spi loopback mode test case */
+static int spi_sample(int argc, char **argv)
+{
+    rt_uint8_t t_buf[32], r_buf[32];
+    int i = 0;
+    static struct rt_spi_message msg1;
+
+    for (i = 0; i < sizeof(t_buf); i++)
+    {
+        t_buf[i] = i;
+    }
+
+    msg1.send_buf   = &t_buf;
+    msg1.recv_buf   = &r_buf;
+    msg1.length     = sizeof(t_buf);
+    msg1.cs_take    = 1;
+    msg1.cs_release = 1;
+    msg1.next       = RT_NULL;
+
+    rt_spi_transfer_message(spi_dev, &msg1);
+
+    rt_kprintf("spi rbuf : ");
+    for (i = 0; i < sizeof(r_buf); i++)
+    {
+        rt_kprintf("%x ", r_buf[i]);
+    }
+
+    rt_kprintf("\nspi loopback mode test over!\n");
+
+    return RT_EOK;
+}
+MSH_CMD_EXPORT(spi_sample, spi loopback test);