1.添加和唤醒源同步的逻辑

2.添加宏调整音量

lichee/linux-4.9/drivers/char/hichs-has/snd_has_play_sound.c

@@ -29,17 +29,35 @@
 #define SAMPLE_RATE 16000
 #define PCM_FORMAT_BITS 16 // SNDRV_PCM_FORMAT_S16_LE
 #define PCM_CHANNEL_NUMBER 1
+#define SOUND_VOLUME (0x000000A2)// TODO:从806获取音量 0~0xFF，default 0xA0 
 
-struct sunxi_has_mem g_mem;
+#define HAS_WAIT_WAKEUP_SRC_TIMEOUT 500 // ms
-struct sunxi_has_clk g_clk;
+#define HAS_WAIT_PLAY_END_TIMEOUT 3000 // ms
-struct has_pa_config *g_pa_config = NULL;
+
-struct platform_device *g_pdev = NULL;
+#define WAKEUP_SOURCE_NONE 0x00 // 复位就是0
-unsigned int g_pa_pin_max = 0;
+#define WAKEUP_SOURCE_TOUCH 0x01
+#define WAKEUP_SOURCE_STREAM 0x02
+#define WAKEUP_SOURCE_DOORBELL 0x03
+#define WAKEUP_SOURCE_PEEPHOLE 0x04
+#define WAKEUP_SOURCE_INVALID 0xFF // 无效值，忽略，表示已经获取过唤醒源
+
+#define DOOLBELL_PARTITION_NAME "doorbell"
+
+// TODO:可以动态分配管理全局变量,放入device数据中
+static struct sunxi_has_mem g_mem;
+static struct sunxi_has_clk g_clk;
+static struct has_pa_config *g_pa_config = NULL;
+static struct platform_device *g_pdev = NULL;
+static unsigned int g_pa_pin_max = 0;
 
 struct resource g_res;
+static unsigned int g_reg_val = 0xA0;
+static atomic_t g_wakeup_src = ATOMIC_INIT(0);
+// static atomic_t g_wakeup_src;
 
-static DECLARE_COMPLETION(doorbell_end);
+static DECLARE_COMPLETION(kill_doorbell);
 static DECLARE_COMPLETION(relase_done);
+static DECLARE_COMPLETION(wakeup_get);
 
 /* WAV文件格式 */
 #pragma pack(1)
@@ -100,6 +118,15 @@ static struct dma_slave_config slave_config = {
 	.src_maxburst = 4,
 };
 
+void doorbell_control(unsigned char wakeup_src) {
+	if (wakeup_src == WAKEUP_SOURCE_DOORBELL)
+	{
+		atomic_set(&g_wakeup_src, wakeup_src);
+	}
+	complete(&wakeup_get);
+}
+EXPORT_SYMBOL(doorbell_control);
+
 static void snd_sunxi_has_mem_deinit(struct platform_device *pdev)
 {
 	devm_iounmap(&pdev->dev, g_mem.membase);
@@ -140,6 +167,8 @@ static int has_free_own_device(struct platform_device *pdev)
 		pr_emerg("pdev is NULL\n");
 		return -1;
 	}
+	/* set default volume */
+	regmap_update_bits(g_mem.regmap, SUNXI_DAC_VOL_CTRL, 0x0000FFFF, g_reg_val);
 	/* clk */
 	snd_sunxi_has_clk_deinit();
 	/* memery io unmap */
@@ -155,7 +184,7 @@ static void has_dma_complete(void *arg)
 {
 	// enum dma_status status;
 	// struct dma_tx_state state;
-	complete(&doorbell_end);
+	complete(&kill_doorbell);
 	// status = dmaengine_tx_status(dma_chan, dma_cookie, &state);
 	// pr_emerg("status:%d residue:%d\n", status, state.residue);
 }
@@ -166,7 +195,7 @@ static size_t has_decode_WAV_and_getPCM(unsigned char *pcm_data)
 	size_t retlen = 0;
 	struct wav_header_t wav_header;
 
-	mtd = get_mtd_device_nm("logo"); // 名称
+	mtd = get_mtd_device_nm(DOOLBELL_PARTITION_NAME); // 名称
 	if (IS_ERR(mtd))
 	{
 		pr_emerg("Failed to get MTD device: %ld\n", PTR_ERR(mtd));
@@ -228,6 +257,12 @@ static int snd_has_pcm_playsound(void *param)
 	dma_addr_t dma_addr = 0;
 	unsigned char *dma_area = NULL;
 
+	wait_for_completion_interruptible_timeout(&wakeup_get, msecs_to_jiffies(HAS_WAIT_WAKEUP_SRC_TIMEOUT));
+	if (atomic_read(&g_wakeup_src) != WAKEUP_SOURCE_DOORBELL)
+	{
+		goto skip_doorbell;
+	}
+
 	dma_area = dma_alloc_coherent(NULL, DMA_ALLOC_SIZE, &dma_addr, GFP_KERNEL); // 申请dma
 	// pr_emerg("dma_area:0x%x dma_addr:0x%x\n", (int)dma_area, (int)dma_addr);
 	if ((!dma_area) || (!dma_addr))
@@ -278,7 +313,7 @@ static int snd_has_pcm_playsound(void *param)
 	dma_async_issue_pending(dma_chan);
 	// pr_emerg("plad sound start!\n");
 
-	wait_for_completion_interruptible(&doorbell_end);
+	wait_for_completion_interruptible_timeout(&kill_doorbell, msecs_to_jiffies(HAS_WAIT_PLAY_END_TIMEOUT));
 	// dmaengine_synchronize(dma_chan);
 	dmaengine_terminate_async(dma_chan);
 
@@ -298,6 +333,7 @@ err_request_init:
 err_read_init:
 	dma_free_coherent(NULL, DMA_ALLOC_SIZE, dma_area, dma_addr);
 err_alloc_init:
+skip_doorbell:
 	has_free_own_device(g_pdev);
 	g_pdev = NULL;
 	complete(&relase_done);
@@ -868,6 +904,12 @@ static void sunxi_has_codec_init(struct sunxi_has_dts *dts)
 
 	regmap_update_bits(regmap, SUNXI_DAC_VOL_CTRL, 1 << DAC_VOL_SEL, 1 << DAC_VOL_SEL);
 	regmap_update_bits(regmap, SUNXI_ADC_DIG_CTRL, 1 << ADC1_2_VOL_EN, 1 << ADC1_2_VOL_EN);
+	regmap_read(regmap, SUNXI_DAC_VOL_CTRL, &g_reg_val);
+	// reg_R_val = (g_reg_val & 0xFF);
+	// reg_L_val = ((g_reg_val >> 8) & 0xFF);
+	// pr_emerg("reg_val:0x%08x, L:0x%02x R:0x%02x\n", reg_val, reg_L_val, reg_R_val);
+	// regmap_update_bits(regmap, SUNXI_DAC_VOL_CTRL, 0x000000FF, SOUND_VOLUME); // R
+	regmap_update_bits(regmap, SUNXI_DAC_VOL_CTRL, 0x0000FFFF, (SOUND_VOLUME << 8 | SOUND_VOLUME)); // L
 }
 
 static int doolbell_drv_open(struct inode *node, struct file *file)
@@ -892,7 +934,8 @@ static long doolbell_drv_ioctl(struct file *file, unsigned int cmd, unsigned lon
 	int value;
     switch (cmd) {
     case DOOLBELL_STOP: {
-		complete(&doorbell_end);
+		complete(&kill_doorbell);
+		complete(&wakeup_get);
 		wait_for_completion_interruptible(&relase_done);
 		if (g_pdev != NULL)
 		{
@@ -902,7 +945,7 @@ static long doolbell_drv_ioctl(struct file *file, unsigned int cmd, unsigned lon
         break;
     }
     case DOOLBELL_GET_STATUS: {
-		/* 用户态应该轮询查询状态 */
+		/* 用户态应该轮询查询状态，轮询不用考虑并发读取g_pdev */
 		if (g_pdev != NULL) // 启动门铃流程未结束
 		{
 			value = DOOLBELL_PLAYING;
@@ -946,6 +989,7 @@ static int has_play_sound_dev_probe(struct platform_device *pdev)
 	g_mem.dev_name = DRV_NAME;
 	g_mem.res = &g_res;
 	g_mem.regmap_config = &g_regmap_config;
+	// atomic_set(&g_wakeup_src, WAKEUP_SOURCE_NONE);
 
 	np = of_find_compatible_node(NULL, NULL, "allwinner,sunxi-snd-plat-aaudio");
 	if (np) {