drivers/net/irda/bfin_sir.h

   1 /*
   2  * Blackfin Infra-red Driver
   3  *
   4  * Copyright 2006-2009 Analog Devices Inc.
   5  *
   6  * Enter bugs at http://blackfin.uclinux.org/
   7  *
   8  * Licensed under the GPL-2 or later.
   9  *
  10  */
  11
  12 #include <linux/serial.h>
  13 #include <linux/module.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/delay.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/slab.h>
  20
  21 #include <net/irda/irda.h>
  22 #include <net/irda/wrapper.h>
  23 #include <net/irda/irda_device.h>
  24
  25 #include <asm/irq.h>
  26 #include <asm/cacheflush.h>
  27 #include <asm/dma.h>
  28 #include <asm/portmux.h>
  29 #undef DRIVER_NAME
  30
  31 #ifdef CONFIG_SIR_BFIN_DMA
  32 struct dma_rx_buf {
  33         char *buf;
  34         int head;
  35         int tail;
  36 };
  37 #endif
  38
  39 struct bfin_sir_port {
  40         unsigned char __iomem   *membase;
  41         unsigned int            irq;
  42         unsigned int            lsr;
  43         unsigned long           clk;
  44         struct net_device       *dev;
  45 #ifdef CONFIG_SIR_BFIN_DMA
  46         int                     tx_done;
  47         struct dma_rx_buf       rx_dma_buf;
  48         struct timer_list       rx_dma_timer;
  49         int                     rx_dma_nrows;
  50 #endif
  51         unsigned int            tx_dma_channel;
  52         unsigned int            rx_dma_channel;
  53 };
  54
  55 struct bfin_sir_port_res {
  56         unsigned long   base_addr;
  57         int             irq;
  58         unsigned int    rx_dma_channel;
  59         unsigned int    tx_dma_channel;
  60 };
  61
  62 struct bfin_sir_self {
  63         struct bfin_sir_port    *sir_port;
  64         spinlock_t              lock;
  65         unsigned int            open;
  66         int                     speed;
  67         int                     newspeed;
  68
  69         struct sk_buff          *txskb;
  70         struct sk_buff          *rxskb;
  71         struct net_device_stats stats;
  72         struct device           *dev;
  73         struct irlap_cb         *irlap;
  74         struct qos_info         qos;
  75
  76         iobuff_t                tx_buff;
  77         iobuff_t                rx_buff;
  78
  79         struct work_struct      work;
  80         int                     mtt;
  81 };
  82
  83 #define DRIVER_NAME "bfin_sir"
  84
  85 #define port_membase(port)     (((struct bfin_sir_port *)(port))->membase)
  86 #define get_lsr_cache(port)    (((struct bfin_sir_port *)(port))->lsr)
  87 #define put_lsr_cache(port, v) (((struct bfin_sir_port *)(port))->lsr = (v))
  88 #include <asm/bfin_serial.h>
  89
  90 static const unsigned short per[][4] = {
  91         /* rx pin      tx pin     NULL  uart_number */
  92         {P_UART0_RX, P_UART0_TX,    0,    0},
  93         {P_UART1_RX, P_UART1_TX,    0,    1},
  94         {P_UART2_RX, P_UART2_TX,    0,    2},
  95         {P_UART3_RX, P_UART3_TX,    0,    3},
  96 };