diff options
Diffstat (limited to 'include/asm-blackfin/mach-bf537/bfin_serial_5xx.h')
| -rw-r--r-- | include/asm-blackfin/mach-bf537/bfin_serial_5xx.h | 147 |
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 000000000000..8f5d9c4d8d5b --- /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 +} |