efHeterogeneousSynchronization preliminaryDataProcessing.c 姚强 commit at 2021-02-26

efHeterogeneousSynchronization/monitoringDataProcessing/preliminaryDataProcessing.c

@@ -860,3 +860,170 @@ static inline void configure_ssc2_pins(unsigned pins)
 		at91_set_A_periph(AT91_PIN_PB16, 1);
 	if (pins & ATMEL_SSC_RF)
 		at91_set_A_periph(AT91_PIN_PB17, 1);
+}
+
+/*
+ * SSC controllers are accessed through library code, instead of any
+ * kind of all-singing/all-dancing driver.  For example one could be
+ * used by a particular I2S audio codec's driver, while another one
+ * on the same system might be used by a custom data capture driver.
+ */
+void __init at91_add_device_ssc(unsigned id, unsigned pins)
+{
+	struct platform_device *pdev;
+
+	/*
+	 * NOTE: caller is responsible for passing information matching
+	 * "pins" to whatever will be using each particular controller.
+	 */
+	switch (id) {
+	case AT91RM9200_ID_SSC0:
+		pdev = &at91rm9200_ssc0_device;
+		configure_ssc0_pins(pins);
+		break;
+	case AT91RM9200_ID_SSC1:
+		pdev = &at91rm9200_ssc1_device;
+		configure_ssc1_pins(pins);
+		break;
+	case AT91RM9200_ID_SSC2:
+		pdev = &at91rm9200_ssc2_device;
+		configure_ssc2_pins(pins);
+		break;
+	default:
+		return;
+	}
+
+	platform_device_register(pdev);
+}
+
+#else
+void __init at91_add_device_ssc(unsigned id, unsigned pins) {}
+#endif
+
+
+/* --------------------------------------------------------------------
+ *  UART
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_SERIAL_ATMEL)
+static struct resource dbgu_resources[] = {
+	[0] = {
+		.start	= AT91RM9200_BASE_DBGU,
+		.end	= AT91RM9200_BASE_DBGU + SZ_512 - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= NR_IRQS_LEGACY + AT91_ID_SYS,
+		.end	= NR_IRQS_LEGACY + AT91_ID_SYS,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct atmel_uart_data dbgu_data = {
+	.use_dma_tx	= 0,
+	.use_dma_rx	= 0,		/* DBGU not capable of receive DMA */
+};
+
+static u64 dbgu_dmamask = DMA_BIT_MASK(32);
+
+static struct platform_device at91rm9200_dbgu_device = {
+	.name		= "atmel_usart",
+	.id		= 0,
+	.dev		= {
+				.dma_mask		= &dbgu_dmamask,
+				.coherent_dma_mask	= DMA_BIT_MASK(32),
+				.platform_data		= &dbgu_data,
+	},
+	.resource	= dbgu_resources,
+	.num_resources	= ARRAY_SIZE(dbgu_resources),
+};
+
+static inline void configure_dbgu_pins(void)
+{
+	at91_set_A_periph(AT91_PIN_PA30, 0);		/* DRXD */
+	at91_set_A_periph(AT91_PIN_PA31, 1);		/* DTXD */
+}
+
+static struct resource uart0_resources[] = {
+	[0] = {
+		.start	= AT91RM9200_BASE_US0,
+		.end	= AT91RM9200_BASE_US0 + SZ_16K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= NR_IRQS_LEGACY + AT91RM9200_ID_US0,
+		.end	= NR_IRQS_LEGACY + AT91RM9200_ID_US0,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct atmel_uart_data uart0_data = {
+	.use_dma_tx	= 1,
+	.use_dma_rx	= 1,
+};
+
+static u64 uart0_dmamask = DMA_BIT_MASK(32);
+
+static struct platform_device at91rm9200_uart0_device = {
+	.name		= "atmel_usart",
+	.id		= 1,
+	.dev		= {
+				.dma_mask		= &uart0_dmamask,
+				.coherent_dma_mask	= DMA_BIT_MASK(32),
+				.platform_data		= &uart0_data,
+	},
+	.resource	= uart0_resources,
+	.num_resources	= ARRAY_SIZE(uart0_resources),
+};
+
+static inline void configure_usart0_pins(unsigned pins)
+{
+	at91_set_A_periph(AT91_PIN_PA17, 1);		/* TXD0 */
+	at91_set_A_periph(AT91_PIN_PA18, 0);		/* RXD0 */
+
+	if (pins & ATMEL_UART_CTS)
+		at91_set_A_periph(AT91_PIN_PA20, 0);	/* CTS0 */
+
+	if (pins & ATMEL_UART_RTS) {
+		/*
+		 * AT91RM9200 Errata #39 - RTS0 is not internally connected to PA21.
+		 *  We need to drive the pin manually.  Default is off (RTS is active low).
+		 */
+		at91_set_gpio_output(AT91_PIN_PA21, 1);
+	}
+}
+
+static struct resource uart1_resources[] = {
+	[0] = {
+		.start	= AT91RM9200_BASE_US1,
+		.end	= AT91RM9200_BASE_US1 + SZ_16K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= NR_IRQS_LEGACY + AT91RM9200_ID_US1,
+		.end	= NR_IRQS_LEGACY + AT91RM9200_ID_US1,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct atmel_uart_data uart1_data = {
+	.use_dma_tx	= 1,
+	.use_dma_rx	= 1,
+};
+
+static u64 uart1_dmamask = DMA_BIT_MASK(32);
+
+static struct platform_device at91rm9200_uart1_device = {
+	.name		= "atmel_usart",
+	.id		= 2,
+	.dev		= {
+				.dma_mask		= &uart1_dmamask,
+				.coherent_dma_mask	= DMA_BIT_MASK(32),
+				.platform_data		= &uart1_data,
+	},
+	.resource	= uart1_resources,
+	.num_resources	= ARRAY_SIZE(uart1_resources),
+};
+
+static inline void configure_usart1_pins(unsigned pins)
+{