add raspi4 dsi and xpt2046 touch driver

bsp/raspberry-pi/raspi4-32/driver/mbox.c

@@ -49,6 +49,24 @@ int mbox_call(unsigned char ch, int mmu_enable)
     return 0;
 }
 
+int bcm271x_mbox_get_touch(void)
+{
+    mbox[0] = 8*4;                      // length of the message
+    mbox[1] = MBOX_REQUEST;             // this is a request message
+    
+    mbox[2] = MBOX_TAG_GET_TOUCHBUF; 
+    mbox[3] = 4;                        // buffer size
+    mbox[4] = 0;                        // len
+
+    mbox[5] = 0;                       // id
+    mbox[6] = 0;
+
+    mbox[7] = MBOX_TAG_LAST;
+    mbox_call(8, MMU_DISABLE);
+
+    return (int)(mbox[5] &  ~0xC0000000);
+}
+
 int bcm271x_notify_reboot(void)
 {
     mbox[0] = 7*4;                          // length of the message

bsp/raspberry-pi/raspi4-32/driver/mbox.h

@@ -132,6 +132,11 @@ enum {
 #define MBOX_TAG_NOTIFY_REBOOT         0x00030048
 #define MBOX_TAG_NOTIFY_XHCI_RESET     0x00030058
 
+/*
+* touch
+*/
+#define MBOX_TAG_GET_TOUCHBUF          (0x0004000F)
+
 #define MBOX_ADDR 0x08000000
 
 #define    RES_CLK_ID           (0x000000000)
@@ -147,6 +152,7 @@ enum {
 #define    PWM_CLK_ID           (0x00000000a)
 
 int mbox_call(unsigned char ch, int mmu_enable);
+int bcm271x_mbox_get_touch(void);
 int bcm271x_notify_reboot(void);
 int bcm271x_notify_xhci_reset(void);
 int bcm271x_gpu_enable(void);

bsp/raspberry-pi/raspi4-32/driver/touch/Sconscript

@@ -0,0 +1,16 @@
+# RT-Thread building script for component
+
+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c') + Glob('*.cpp')
+CPPPATH = [cwd]
+
+if not GetDepend('BSP_USING_XPT_TOUCH_DEV'):
+    SrcRemove(src, ['drv_xpt2046.c'])
+if not GetDepend('BSP_USING_DSI_TOUCH_DEV'):
+    SrcRemove(src, ['drv_dsi_touch.c'])
+
+group = DefineGroup('drv_touch', src, depend = ['BSP_USING_TOUCH'], CPPPATH = CPPPATH)
+
+Return('group')

bsp/raspberry-pi/raspi4-32/driver/touch/drv_dsi_touch.c

@@ -0,0 +1,125 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-11-26     bigmagic       first version
+ */
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <touch.h>
+
+#include "mbox.h"
+#include "drv_dsi_touch.h"
+
+#define DBG_TAG "dsi_touch"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+static rt_touch_t touch_device = RT_NULL;
+static struct rt_semaphore dsi_touch_ack;
+
+static rt_uint32_t touch_x;
+static rt_uint32_t touch_y;
+static rt_uint32_t touch_state;
+
+static rt_thread_t dsi_touch_tid = RT_NULL;
+#define DSI_TOUCH_THREAD_STACK_SIZE     (4096)
+#define DSI_TOUCH_THREAD_PRIORITY       (25)
+#define DSI_TOUCH_THREAD_TIMESLICE      (10)
+
+#define MAXIMUM_SUPPORTED_POINTS        (10)
+
+struct touch_regs
+{
+    uint8_t device_mode;
+    uint8_t gesture_id;
+    uint8_t num_points;
+    struct touch
+    {
+        uint8_t xh;
+        uint8_t xl;
+        uint8_t yh;
+        uint8_t yl;
+        uint8_t res1;
+        uint8_t res2;
+    } point[MAXIMUM_SUPPORTED_POINTS];
+};
+
+static void dsi_touch_thread_entry(void *param)
+{
+    static volatile uint32_t touchbuf;
+    touchbuf = bcm271x_mbox_get_touch(); //0x0f436000
+    while (1)
+    {
+        struct touch_regs *regs = (struct touch_regs *)touchbuf;
+        if ((regs->num_points > 0) && (regs->num_points < MAXIMUM_SUPPORTED_POINTS))
+        {
+            //only one touch point
+            touch_x = (((int)regs->point[0].xh & 0xf) << 8) + regs->point[0].xl;
+            touch_y = (((int)regs->point[0].yh & 0xf) << 8) + regs->point[0].yl;
+            touch_state = 1;
+        }
+        else
+        {
+            touch_state = 0;
+        }
+        rt_thread_mdelay(50); 
+    }
+}
+
+static rt_size_t dsi_read_point(struct rt_touch_device *touch, void *buf, rt_size_t read_num)
+{
+    rt_uint16_t* touchxy = (rt_uint16_t *)buf;
+    if((read_num != 0) && (touch_state == 1))
+    {
+        touchxy[0] = touch_x;
+        touchxy[1] = touch_y;
+        touch_state = 0;
+        return read_num;
+    }
+    else
+    {
+        return 0;
+    }
+}
+
+static rt_err_t dsi_control(struct rt_touch_device *device, int cmd, void *data)
+{
+    return RT_EOK;
+}
+
+static struct rt_touch_ops dsi_touch_ops =
+{
+    .touch_readpoint = dsi_read_point,
+    .touch_control = dsi_control,
+};
+
+static int hw_dsi_touch_init(void)
+{
+    //touch sem
+    rt_sem_init(&dsi_touch_ack, "dsi_touch_ack", 0, RT_IPC_FLAG_FIFO);
+
+    dsi_touch_tid = rt_thread_create("dsi_touch",
+                            dsi_touch_thread_entry, RT_NULL,
+                            DSI_TOUCH_THREAD_STACK_SIZE,
+                            DSI_TOUCH_THREAD_PRIORITY, DSI_TOUCH_THREAD_TIMESLICE);
+    if (dsi_touch_tid != RT_NULL)
+        rt_thread_startup(dsi_touch_tid);
+
+    touch_device = (rt_touch_t)rt_calloc(1, sizeof(struct rt_touch_device));
+
+    if (touch_device == RT_NULL)
+        return -RT_ERROR;
+
+    /* register touch device */
+    touch_device->info.type = RT_TOUCH_TYPE_RESISTANCE;
+    touch_device->info.vendor = RT_TOUCH_VENDOR_UNKNOWN;
+    //rt_memcpy(&touch_device->config, cfg, sizeof(struct rt_touch_config));
+    touch_device->ops = &dsi_touch_ops;
+    rt_hw_touch_register(touch_device, "dsi_touch", RT_DEVICE_FLAG_INT_RX, RT_NULL);
+    return 0;
+}
+INIT_DEVICE_EXPORT(hw_dsi_touch_init);

bsp/raspberry-pi/raspi4-32/driver/touch/drv_dsi_touch.h

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-11-26     bigmagic       first version
+ */
+#ifndef __DRV_DSI_TOUCH_H__
+#define __DRV_DSI_TOUCH_H__
+
+#endif//DSI TOUCH

bsp/raspberry-pi/raspi4-32/driver/touch/drv_xpt2046.h

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author         Notes
+ * 2020-11-08     bigmagic       first version
+ */
+#ifndef __DRV_XPT2046_H__
+#define __DRV_XPT2046_H__
+
+#endif//XPT2046