include/asm-blackfin/mach-bf561/bfin_serial_5xx.h

   1 #include <linux/serial.h>
   2 #include <asm/dma.h>
   3
   4 #define NR_PORTS                1
   5
   6 #define OFFSET_THR              0x00    /* Transmit Holding register            */
   7 #define OFFSET_RBR              0x00    /* Receive Buffer register              */
   8 #define OFFSET_DLL              0x00    /* Divisor Latch (Low-Byte)             */
   9 #define OFFSET_IER              0x04    /* Interrupt Enable Register            */
  10 #define OFFSET_DLH              0x04    /* Divisor Latch (High-Byte)            */
  11 #define OFFSET_IIR              0x08    /* Interrupt Identification Register    */
  12 #define OFFSET_LCR              0x0C    /* Line Control Register                */
  13 #define OFFSET_MCR              0x10    /* Modem Control Register               */
  14 #define OFFSET_LSR              0x14    /* Line Status Register                 */
  15 #define OFFSET_MSR              0x18    /* Modem Status Register                */
  16 #define OFFSET_SCR              0x1C    /* SCR Scratch Register                 */
  17 #define OFFSET_GCTL             0x24    /* Global Control Register              */
  18
  19 #define UART_GET_CHAR(uart)     bfin_read16(((uart)->port.membase + OFFSET_RBR))
  20 #define UART_GET_DLL(uart)      bfin_read16(((uart)->port.membase + OFFSET_DLL))
  21 #define UART_GET_IER(uart)      bfin_read16(((uart)->port.membase + OFFSET_IER))
  22 #define UART_GET_DLH(uart)      bfin_read16(((uart)->port.membase + OFFSET_DLH))
  23 #define UART_GET_IIR(uart)      bfin_read16(((uart)->port.membase + OFFSET_IIR))
  24 #define UART_GET_LCR(uart)      bfin_read16(((uart)->port.membase + OFFSET_LCR))
  25 #define UART_GET_LSR(uart)      bfin_read16(((uart)->port.membase + OFFSET_LSR))
  26 #define UART_GET_GCTL(uart)     bfin_read16(((uart)->port.membase + OFFSET_GCTL))
  27
  28 #define UART_PUT_CHAR(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_THR),v)
  29 #define UART_PUT_DLL(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_DLL),v)
  30 #define UART_PUT_IER(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_IER),v)
  31 #define UART_PUT_DLH(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_DLH),v)
  32 #define UART_PUT_LCR(uart,v)    bfin_write16(((uart)->port.membase + OFFSET_LCR),v)
  33 #define UART_PUT_GCTL(uart,v)   bfin_write16(((uart)->port.membase + OFFSET_GCTL),v)
  34
  35 #ifdef CONFIG_BFIN_UART0_CTSRTS
  36 # define CONFIG_SERIAL_BFIN_CTSRTS
  37 # ifndef CONFIG_UART0_CTS_PIN
  38 #  define CONFIG_UART0_CTS_PIN -1
  39 # endif
  40 # ifndef CONFIG_UART0_RTS_PIN
  41 #  define CONFIG_UART0_RTS_PIN -1
  42 # endif
  43 #endif
  44
  45 struct bfin_serial_port {
  46         struct uart_port        port;
  47         unsigned int            old_status;
  48 #ifdef CONFIG_SERIAL_BFIN_DMA
  49         int                     tx_done;
  50         int                     tx_count;
  51         struct circ_buf         rx_dma_buf;
  52         struct timer_list       rx_dma_timer;
  53         int                     rx_dma_nrows;
  54         unsigned int            tx_dma_channel;
  55         unsigned int            rx_dma_channel;
  56         struct work_struct      tx_dma_workqueue;
  57 #else
  58         struct work_struct      cts_workqueue;
  59 #endif
  60 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
  61         int                     cts_pin;
  62         int                     rts_pin;
  63 #endif
  64 };
  65
  66 struct bfin_serial_port bfin_serial_ports[NR_PORTS];
  67 struct bfin_serial_res {
  68         unsigned long   uart_base_addr;
  69         int             uart_irq;
  70 #ifdef CONFIG_SERIAL_BFIN_DMA
  71         unsigned int    uart_tx_dma_channel;
  72         unsigned int    uart_rx_dma_channel;
  73 #endif
  74 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
  75         int             uart_cts_pin;
  76         int             uart_rts_pin;
  77 #endif
  78 };
  79
  80 struct bfin_serial_res bfin_serial_resource[] = {
  81         0xFFC00400,
  82         IRQ_UART_RX,
  83 #ifdef CONFIG_SERIAL_BFIN_DMA
  84         CH_UART_TX,
  85         CH_UART_RX,
  86 #endif
  87 #ifdef CONFIG_BFIN_UART0_CTSRTS
  88         CONFIG_UART0_CTS_PIN,
  89         CONFIG_UART0_RTS_PIN,
  90 #endif
  91 };
  92
  93
  94 int nr_ports = NR_PORTS;
  95 static void bfin_serial_hw_init(struct bfin_serial_port *uart)
  96 {
  97
  98 #ifdef CONFIG_SERIAL_BFIN_CTSRTS
  99         if (uart->cts_pin >= 0) {
 100                 gpio_request(uart->cts_pin, NULL);
 101                 gpio_direction_input(uart->cts_pin);
 102         }
 103         if (uart->rts_pin >= 0) {
 104                 gpio_request(uart->rts_pin, NULL);
 105                 gpio_direction_input(uart->rts_pin);
 106         }
 107 #endif
 108 }