arch/blackfin/mach-bf548/include/mach/bfin_sir.h

   1 /*
   2  * Blackfin Infra-red Driver
   3  *
   4  * Copyright 2006-2008 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 <asm/dma.h>
  14 #include <asm/portmux.h>
  15
  16 #define SIR_UART_GET_CHAR(port)   bfin_read16((port)->membase + OFFSET_RBR)
  17 #define SIR_UART_GET_DLL(port)    bfin_read16((port)->membase + OFFSET_DLL)
  18 #define SIR_UART_GET_IER(port)    bfin_read16((port)->membase + OFFSET_IER_SET)
  19 #define SIR_UART_GET_DLH(port)    bfin_read16((port)->membase + OFFSET_DLH)
  20 #define SIR_UART_GET_LCR(port)    bfin_read16((port)->membase + OFFSET_LCR)
  21 #define SIR_UART_GET_LSR(port)    bfin_read16((port)->membase + OFFSET_LSR)
  22 #define SIR_UART_GET_GCTL(port)   bfin_read16((port)->membase + OFFSET_GCTL)
  23
  24 #define SIR_UART_PUT_CHAR(port, v) bfin_write16(((port)->membase + OFFSET_THR), v)
  25 #define SIR_UART_PUT_DLL(port, v)  bfin_write16(((port)->membase + OFFSET_DLL), v)
  26 #define SIR_UART_SET_IER(port, v)  bfin_write16(((port)->membase + OFFSET_IER_SET), v)
  27 #define SIR_UART_CLEAR_IER(port, v)  bfin_write16(((port)->membase + OFFSET_IER_CLEAR), v)
  28 #define SIR_UART_PUT_DLH(port, v)  bfin_write16(((port)->membase + OFFSET_DLH), v)
  29 #define SIR_UART_PUT_LSR(port, v)  bfin_write16(((port)->membase + OFFSET_LSR), v)
  30 #define SIR_UART_PUT_LCR(port, v)  bfin_write16(((port)->membase + OFFSET_LCR), v)
  31 #define SIR_UART_CLEAR_LSR(port)  bfin_write16(((port)->membase + OFFSET_LSR), -1)
  32 #define SIR_UART_PUT_GCTL(port, v) bfin_write16(((port)->membase + OFFSET_GCTL), v)
  33
  34 #ifdef CONFIG_SIR_BFIN_DMA
  35 struct dma_rx_buf {
  36         char *buf;
  37         int head;
  38         int tail;
  39         };
  40 #endif /* CONFIG_SIR_BFIN_DMA */
  41
  42 struct bfin_sir_port {
  43         unsigned char __iomem   *membase;
  44         unsigned int            irq;
  45         unsigned int            lsr;
  46         unsigned long           clk;
  47         struct net_device       *dev;
  48 #ifdef CONFIG_SIR_BFIN_DMA
  49         int                     tx_done;
  50         struct dma_rx_buf       rx_dma_buf;
  51         struct timer_list       rx_dma_timer;
  52         int                     rx_dma_nrows;
  53 #endif /* CONFIG_SIR_BFIN_DMA */
  54         unsigned int            tx_dma_channel;
  55         unsigned int            rx_dma_channel;
  56 };
  57
  58 struct bfin_sir_port sir_ports[BFIN_UART_NR_PORTS];
  59
  60 struct bfin_sir_port_res {
  61         unsigned long   base_addr;
  62         int             irq;
  63         unsigned int    rx_dma_channel;
  64         unsigned int    tx_dma_channel;
  65 };
  66
  67 struct bfin_sir_port_res bfin_sir_port_resource[] = {
  68 #ifdef CONFIG_BFIN_SIR0
  69         {
  70         0xFFC00400,
  71         IRQ_UART0_RX,
  72         CH_UART0_RX,
  73         CH_UART0_TX,
  74         },
  75 #endif
  76 #ifdef CONFIG_BFIN_SIR1
  77         {
  78         0xFFC02000,
  79         IRQ_UART1_RX,
  80         CH_UART1_RX,
  81         CH_UART1_TX,
  82         },
  83 #endif
  84 #ifdef CONFIG_BFIN_SIR2
  85         {
  86         0xFFC02100,
  87         IRQ_UART2_RX,
  88         CH_UART2_RX,
  89         CH_UART2_TX,
  90         },
  91 #endif
  92 #ifdef CONFIG_BFIN_SIR3
  93         {
  94         0xFFC03100,
  95         IRQ_UART3_RX,
  96         CH_UART3_RX,
  97         CH_UART3_TX,
  98         },
  99 #endif
 100 };
 101
 102 int nr_sirs = ARRAY_SIZE(bfin_sir_port_resource);
 103
 104 struct bfin_sir_self {
 105         struct bfin_sir_port    *sir_port;
 106         spinlock_t              lock;
 107         unsigned int            open;
 108         int                     speed;
 109         int                     newspeed;
 110
 111         struct sk_buff          *txskb;
 112         struct sk_buff          *rxskb;
 113         struct net_device_stats stats;
 114         struct device           *dev;
 115         struct irlap_cb         *irlap;
 116         struct qos_info         qos;
 117
 118         iobuff_t                tx_buff;
 119         iobuff_t                rx_buff;
 120
 121         struct work_struct      work;
 122         int                     mtt;
 123 };
 124
 125 #define DRIVER_NAME "bfin_sir"
 126
 127 static int bfin_sir_hw_init(void)
 128 {
 129         int ret = -ENODEV;
 130 #ifdef CONFIG_BFIN_SIR0
 131         ret = peripheral_request(P_UART0_TX, DRIVER_NAME);
 132         if (ret)
 133                 return ret;
 134         ret = peripheral_request(P_UART0_RX, DRIVER_NAME);
 135         if (ret)
 136                 return ret;
 137 #endif
 138
 139 #ifdef CONFIG_BFIN_SIR1
 140         ret = peripheral_request(P_UART1_TX, DRIVER_NAME);
 141         if (ret)
 142                 return ret;
 143         ret = peripheral_request(P_UART1_RX, DRIVER_NAME);
 144         if (ret)
 145                 return ret;
 146 #endif
 147
 148 #ifdef CONFIG_BFIN_SIR2
 149         ret = peripheral_request(P_UART2_TX, DRIVER_NAME);
 150         if (ret)
 151                 return ret;
 152         ret = peripheral_request(P_UART2_RX, DRIVER_NAME);
 153         if (ret)
 154                 return ret;
 155 #endif
 156
 157 #ifdef CONFIG_BFIN_SIR3
 158         ret = peripheral_request(P_UART3_TX, DRIVER_NAME);
 159         if (ret)
 160                 return ret;
 161         ret = peripheral_request(P_UART3_RX, DRIVER_NAME);
 162         if (ret)
 163                 return ret;
 164 #endif
 165         return ret;
 166 }