LXR linux/drivers/net/irda/bfin

   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
  32struct dma_rx_buf {
  33        char *buf;
  34        int head;
  35        int tail;
  36};
  37#endif
  38
  39struct 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
  55struct 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
  62struct 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
  90static 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};
  97