drivers/net/wireless/bcm43xx/bcm43xx_pio.h

   1 #ifndef BCM43xx_PIO_H_
   2 #define BCM43xx_PIO_H_
   3
   4 #include "bcm43xx.h"
   5
   6 #include <linux/interrupt.h>
   7 #include <linux/list.h>
   8 #include <linux/skbuff.h>
   9
  10
  11 #define BCM43xx_PIO_TXCTL               0x00
  12 #define BCM43xx_PIO_TXDATA              0x02
  13 #define BCM43xx_PIO_TXQBUFSIZE          0x04
  14 #define BCM43xx_PIO_RXCTL               0x08
  15 #define BCM43xx_PIO_RXDATA              0x0A
  16
  17 #define BCM43xx_PIO_TXCTL_WRITEHI       (1 << 0)
  18 #define BCM43xx_PIO_TXCTL_WRITELO       (1 << 1)
  19 #define BCM43xx_PIO_TXCTL_COMPLETE      (1 << 2)
  20 #define BCM43xx_PIO_TXCTL_INIT          (1 << 3)
  21 #define BCM43xx_PIO_TXCTL_SUSPEND       (1 << 7)
  22
  23 #define BCM43xx_PIO_RXCTL_DATAAVAILABLE (1 << 0)
  24 #define BCM43xx_PIO_RXCTL_READY         (1 << 1)
  25
  26 /* PIO constants */
  27 #define BCM43xx_PIO_MAXTXDEVQPACKETS    31
  28 #define BCM43xx_PIO_TXQADJUST           80
  29
  30 /* PIO tuning knobs */
  31 #define BCM43xx_PIO_MAXTXPACKETS        256
  32
  33
  34
  35 #ifdef CONFIG_BCM43XX_PIO
  36
  37
  38 struct bcm43xx_pioqueue;
  39 struct bcm43xx_xmitstatus;
  40
  41 struct bcm43xx_pio_txpacket {
  42         struct bcm43xx_pioqueue *queue;
  43         struct ieee80211_txb *txb;
  44         struct list_head list;
  45
  46         u8 xmitted_frags;
  47         u16 xmitted_octets;
  48 };
  49
  50 #define pio_txpacket_getindex(packet) ((int)((packet) - (packet)->queue->tx_packets_cache))
  51
  52 struct bcm43xx_pioqueue {
  53         struct bcm43xx_private *bcm;
  54         u16 mmio_base;
  55
  56         u8 tx_suspended:1,
  57            need_workarounds:1; /* Workarounds needed for core.rev < 3 */
  58
  59         /* Adjusted size of the device internal TX buffer. */
  60         u16 tx_devq_size;
  61         /* Used octets of the device internal TX buffer. */
  62         u16 tx_devq_used;
  63         /* Used packet slots in the device internal TX buffer. */
  64         u8 tx_devq_packets;
  65         /* Packets from the txfree list can
  66          * be taken on incoming TX requests.
  67          */
  68         struct list_head txfree;
  69         unsigned int nr_txfree;
  70         /* Packets on the txqueue are queued,
  71          * but not completely written to the chip, yet.
  72          */
  73         struct list_head txqueue;
  74         /* Packets on the txrunning queue are completely
  75          * posted to the device. We are waiting for the txstatus.
  76          */
  77         struct list_head txrunning;
  78         /* Total number or packets sent.
  79          * (This counter can obviously wrap).
  80          */
  81         unsigned int nr_tx_packets;
  82         struct tasklet_struct txtask;
  83         struct bcm43xx_pio_txpacket tx_packets_cache[BCM43xx_PIO_MAXTXPACKETS];
  84 };
  85
  86 static inline
  87 u16 bcm43xx_pio_read(struct bcm43xx_pioqueue *queue,
  88                      u16 offset)
  89 {
  90         return bcm43xx_read16(queue->bcm, queue->mmio_base + offset);
  91 }
  92
  93 static inline
  94 void bcm43xx_pio_write(struct bcm43xx_pioqueue *queue,
  95                        u16 offset, u16 value)
  96 {
  97         bcm43xx_write16(queue->bcm, queue->mmio_base + offset, value);
  98 }
  99
 100
 101 int bcm43xx_pio_init(struct bcm43xx_private *bcm);
 102 void bcm43xx_pio_free(struct bcm43xx_private *bcm);
 103
 104 int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
 105                    struct ieee80211_txb *txb);
 106 void bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
 107                                    struct bcm43xx_xmitstatus *status);
 108 void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue);
 109
 110 #else /* CONFIG_BCM43XX_PIO */
 111
 112 static inline
 113 int bcm43xx_pio_init(struct bcm43xx_private *bcm)
 114 {
 115         return 0;
 116 }
 117 static inline
 118 void bcm43xx_pio_free(struct bcm43xx_private *bcm)
 119 {
 120 }
 121 static inline
 122 int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
 123                    struct ieee80211_txb *txb)
 124 {
 125         return 0;
 126 }
 127 static inline
 128 void bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
 129                                    struct bcm43xx_xmitstatus *status)
 130 {
 131 }
 132 static inline
 133 void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue)
 134 {
 135 }
 136
 137 #endif /* CONFIG_BCM43XX_PIO */
 138 #endif /* BCM43xx_PIO_H_ */