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Diffstat (limited to 'include/asm-blackfin/mach-bf537/bfin_serial_5xx.h')
-rw-r--r--include/asm-blackfin/mach-bf537/bfin_serial_5xx.h147
1 files changed, 147 insertions, 0 deletions
diff --git a/include/asm-blackfin/mach-bf537/bfin_serial_5xx.h b/include/asm-blackfin/mach-bf537/bfin_serial_5xx.h
new file mode 100644
index 0000000..8f5d9c4
--- /dev/null
+++ b/include/asm-blackfin/mach-bf537/bfin_serial_5xx.h
@@ -0,0 +1,147 @@
+#include <linux/serial.h>
+#include <asm/dma.h>
+
+#define NR_PORTS 2
+
+#define OFFSET_THR 0x00 /* Transmit Holding register */
+#define OFFSET_RBR 0x00 /* Receive Buffer register */
+#define OFFSET_DLL 0x00 /* Divisor Latch (Low-Byte) */
+#define OFFSET_IER 0x04 /* Interrupt Enable Register */
+#define OFFSET_DLH 0x04 /* Divisor Latch (High-Byte) */
+#define OFFSET_IIR 0x08 /* Interrupt Identification Register */
+#define OFFSET_LCR 0x0C /* Line Control Register */
+#define OFFSET_MCR 0x10 /* Modem Control Register */
+#define OFFSET_LSR 0x14 /* Line Status Register */
+#define OFFSET_MSR 0x18 /* Modem Status Register */
+#define OFFSET_SCR 0x1C /* SCR Scratch Register */
+#define OFFSET_GCTL 0x24 /* Global Control Register */
+
+#define UART_GET_CHAR(uart) bfin_read16(((uart)->port.membase + OFFSET_RBR))
+#define UART_GET_DLL(uart) bfin_read16(((uart)->port.membase + OFFSET_DLL))
+#define UART_GET_IER(uart) bfin_read16(((uart)->port.membase + OFFSET_IER))
+#define UART_GET_DLH(uart) bfin_read16(((uart)->port.membase + OFFSET_DLH))
+#define UART_GET_IIR(uart) bfin_read16(((uart)->port.membase + OFFSET_IIR))
+#define UART_GET_LCR(uart) bfin_read16(((uart)->port.membase + OFFSET_LCR))
+#define UART_GET_LSR(uart) bfin_read16(((uart)->port.membase + OFFSET_LSR))
+#define UART_GET_GCTL(uart) bfin_read16(((uart)->port.membase + OFFSET_GCTL))
+
+#define UART_PUT_CHAR(uart,v) bfin_write16(((uart)->port.membase + OFFSET_THR),v)
+#define UART_PUT_DLL(uart,v) bfin_write16(((uart)->port.membase + OFFSET_DLL),v)
+#define UART_PUT_IER(uart,v) bfin_write16(((uart)->port.membase + OFFSET_IER),v)
+#define UART_PUT_DLH(uart,v) bfin_write16(((uart)->port.membase + OFFSET_DLH),v)
+#define UART_PUT_LCR(uart,v) bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
+#define UART_PUT_GCTL(uart,v) bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)
+
+#if defined(CONFIG_BFIN_UART0_CTSRTS) || defined(CONFIG_BFIN_UART1_CTSRTS)
+# define CONFIG_SERIAL_BFIN_CTSRTS
+
+# ifndef CONFIG_UART0_CTS_PIN
+# define CONFIG_UART0_CTS_PIN -1
+# endif
+
+# ifndef CONFIG_UART0_RTS_PIN
+# define CONFIG_UART0_RTS_PIN -1
+# endif
+
+# ifndef CONFIG_UART1_CTS_PIN
+# define CONFIG_UART1_CTS_PIN -1
+# endif
+
+# ifndef CONFIG_UART1_RTS_PIN
+# define CONFIG_UART1_RTS_PIN -1
+# endif
+#endif
+/*
+ * The pin configuration is different from schematic
+ */
+struct bfin_serial_port {
+ struct uart_port port;
+ unsigned int old_status;
+#ifdef CONFIG_SERIAL_BFIN_DMA
+ int tx_done;
+ int tx_count;
+ struct circ_buf rx_dma_buf;
+ struct timer_list rx_dma_timer;
+ int rx_dma_nrows;
+ unsigned int tx_dma_channel;
+ unsigned int rx_dma_channel;
+ struct work_struct tx_dma_workqueue;
+#else
+ struct work_struct cts_workqueue;
+#endif
+#ifdef CONFIG_SERIAL_BFIN_CTSRTS
+ int cts_pin;
+ int rts_pin;
+#endif
+};
+
+struct bfin_serial_port bfin_serial_ports[NR_PORTS];
+struct bfin_serial_res {
+ unsigned long uart_base_addr;
+ int uart_irq;
+#ifdef CONFIG_SERIAL_BFIN_DMA
+ unsigned int uart_tx_dma_channel;
+ unsigned int uart_rx_dma_channel;
+#endif
+#ifdef CONFIG_SERIAL_BFIN_CTSRTS
+ int uart_cts_pin;
+ int uart_rts_pin;
+#endif
+};
+
+struct bfin_serial_res bfin_serial_resource[] = {
+#ifdef CONFIG_SERIAL_BFIN_UART0
+ {
+ 0xFFC00400,
+ IRQ_UART0_RX,
+#ifdef CONFIG_SERIAL_BFIN_DMA
+ CH_UART0_TX,
+ CH_UART0_RX,
+#endif
+#ifdef CONFIG_BFIN_UART0_CTSRTS
+ CONFIG_UART0_CTS_PIN,
+ CONFIG_UART0_RTS_PIN,
+#endif
+ },
+#endif
+#ifdef CONFIG_SERIAL_BFIN_UART1
+ {
+ 0xFFC02000,
+ IRQ_UART1_RX,
+#ifdef CONFIG_SERIAL_BFIN_DMA
+ CH_UART1_TX,
+ CH_UART1_RX,
+#endif
+#ifdef CONFIG_BFIN_UART1_CTSRTS
+ CONFIG_UART1_CTS_PIN,
+ CONFIG_UART1_RTS_PIN,
+#endif
+ },
+#endif
+};
+
+int nr_ports = ARRAY_SIZE(bfin_serial_resource);
+
+static void bfin_serial_hw_init(struct bfin_serial_port *uart)
+{
+ unsigned short val;
+ val = bfin_read16(BFIN_PORT_MUX);
+ val &= ~(PFDE | PFTE);
+ bfin_write16(BFIN_PORT_MUX, val);
+
+ val = bfin_read16(PORTF_FER);
+ val |= 0xF;
+ bfin_write16(PORTF_FER, val);
+
+#ifdef CONFIG_SERIAL_BFIN_CTSRTS
+ if (uart->cts_pin >= 0) {
+ gpio_request(uart->cts_pin, NULL);
+ gpio_direction_input(uart->cts_pin);
+ }
+
+ if (uart->rts_pin >= 0) {
+ gpio_request(uart->rts_pin, NULL);
+ gpio_direction_output(uart->rts_pin);
+ }
+#endif
+}
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