diff options
Diffstat (limited to 'include/asm-blackfin/mach-bf548/bfin_serial_5xx.h')
| -rw-r--r-- | include/asm-blackfin/mach-bf548/bfin_serial_5xx.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/include/asm-blackfin/mach-bf548/bfin_serial_5xx.h b/include/asm-blackfin/mach-bf548/bfin_serial_5xx.h new file mode 100644 index 00000000000..2f4afc90db1 --- /dev/null +++ b/include/asm-blackfin/mach-bf548/bfin_serial_5xx.h @@ -0,0 +1,193 @@ +#include <linux/serial.h> +#include <asm/dma.h> + +#define NR_PORTS 4 + +#define OFFSET_DLL 0x00 /* Divisor Latch (Low-Byte) */ +#define OFFSET_DLH 0x04 /* Divisor Latch (High-Byte) */ +#define OFFSET_GCTL 0x08 /* Global Control 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_IER_SET 0x20 /* Set Interrupt Enable Register */ +#define OFFSET_IER_CLEAR 0x24 /* Clear Interrupt Enable Register */ +#define OFFSET_THR 0x28 /* Transmit Holding register */ +#define OFFSET_RBR 0x2C /* Receive Buffer 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_DLH(uart) bfin_read16(((uart)->port.membase + OFFSET_DLH)) +#define UART_GET_IER(uart) bfin_read16(((uart)->port.membase + OFFSET_IER_SET)) +#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_SET_IER(uart,v) bfin_write16(((uart)->port.membase + OFFSET_IER_SET),v) +#define UART_CLEAR_IER(uart,v) bfin_write16(((uart)->port.membase + OFFSET_IER_CLEAR),v) +#define UART_PUT_DLH(uart,v) bfin_write16(((uart)->port.membase + OFFSET_DLH),v) +#define UART_PUT_LSR(uart,v) bfin_write16(((uart)->port.membase + OFFSET_LSR),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 + }, +#endif +#ifdef CONFIG_SERIAL_BFIN_UART2 + { + 0xFFC02100, + IRQ_UART2_RX, +#ifdef CONFIG_SERIAL_BFIN_DMA + CH_UART2_TX, + CH_UART2_RX, +#endif +#ifdef CONFIG_BFIN_UART2_CTSRTS + CONFIG_UART2_CTS_PIN, + CONFIG_UART2_RTS_PIN, +#endif + }, +#endif +#ifdef CONFIG_SERIAL_BFIN_UART3 + { + 0xFFC03100, + IRQ_UART3_RX, +#ifdef CONFIG_SERIAL_BFIN_DMA + CH_UART3_TX, + CH_UART3_RX, +#endif + }, +#endif +}; + +int nr_ports = ARRAY_SIZE(bfin_serial_resource); + +static void bfin_serial_hw_init(struct bfin_serial_port *uart) +{ +#ifdef CONFIG_SERIAL_BFIN_UART0 + /* Enable UART0 RX and TX on pin 7 & 8 of PORT E */ + bfin_write_PORTE_FER(0x180 | bfin_read_PORTE_FER()); + bfin_write_PORTE_MUX(0x3C000 | bfin_read_PORTE_MUX()); +#endif + +#ifdef CONFIG_SERIAL_BFIN_UART1 + /* Enable UART1 RX and TX on pin 0 & 1 of PORT H */ + bfin_write_PORTH_FER(0x3 | bfin_read_PORTH_FER()); + bfin_write_PORTH_MUX(~0xF & bfin_read_PORTH_MUX()); +#ifdef CONFIG_BFIN_UART1_CTSRTS + /* Enable UART1 RTS and CTS on pin 9 & 10 of PORT E */ + bfin_write_PORTE_FER(0x600 | bfin_read_PORTE_FER()); + bfin_write_PORTE_MUX(~0x3C0000 & bfin_read_PORTE_MUX()); +#endif +#endif + +#ifdef CONFIG_SERIAL_BFIN_UART2 + /* Enable UART2 RX and TX on pin 4 & 5 of PORT B */ + bfin_write_PORTB_FER(0x30 | bfin_read_PORTB_FER()); + bfin_write_PORTB_MUX(~0xF00 & bfin_read_PORTB_MUX()); +#endif + +#ifdef CONFIG_SERIAL_BFIN_UART3 + /* Enable UART3 RX and TX on pin 6 & 7 of PORT B */ + bfin_write_PORTB_FER(0xC0 | bfin_read_PORTB_FER()); + bfin_write_PORTB_MUX(~0xF000 | bfin_read_PORTB_MUX()); +#ifdef CONFIG_BFIN_UART3_CTSRTS + /* Enable UART3 RTS and CTS on pin 2 & 3 of PORT B */ + bfin_write_PORTB_FER(0xC | bfin_read_PORTB_FER()); + bfin_write_PORTB_MUX(~0xF0 | bfin_read_PORTB_MUX()); +#endif +#endif + SSYNC(); +#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 +} |