6 #include <linux/interrupt.h>
7 #include <linux/list.h>
8 #include <linux/skbuff.h>
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
17 #define BCM43xx_PIO_TXCTL_WRITELO (1 << 0)
18 #define BCM43xx_PIO_TXCTL_WRITEHI (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)
23 #define BCM43xx_PIO_RXCTL_DATAAVAILABLE (1 << 0)
24 #define BCM43xx_PIO_RXCTL_READY (1 << 1)
27 #define BCM43xx_PIO_MAXTXDEVQPACKETS 31
28 #define BCM43xx_PIO_TXQADJUST 80
30 /* PIO tuning knobs */
31 #define BCM43xx_PIO_MAXTXPACKETS 256
35 #ifdef CONFIG_BCM43XX_PIO
38 struct bcm43xx_pioqueue;
39 struct bcm43xx_xmitstatus;
41 struct bcm43xx_pio_txpacket {
42 struct bcm43xx_pioqueue *queue;
43 struct ieee80211_txb *txb;
44 struct list_head list;
50 #define pio_txpacket_getindex(packet) ((int)((packet) - (packet)->queue->tx_packets_cache))
52 struct bcm43xx_pioqueue {
53 struct bcm43xx_private *bcm;
58 need_workarounds:1; /* Workarounds needed for core.rev < 3 */
60 /* Adjusted size of the device internal TX buffer. */
62 /* Used octets of the device internal TX buffer. */
64 /* Used packet slots in the device internal TX buffer. */
66 /* Packets from the txfree list can
67 * be taken on incoming TX requests.
69 struct list_head txfree;
70 unsigned int nr_txfree;
71 /* Packets on the txqueue are queued,
72 * but not completely written to the chip, yet.
74 struct list_head txqueue;
75 /* Packets on the txrunning queue are completely
76 * posted to the device. We are waiting for the txstatus.
78 struct list_head txrunning;
79 /* Total number or packets sent.
80 * (This counter can obviously wrap).
82 unsigned int nr_tx_packets;
83 struct tasklet_struct txtask;
84 struct bcm43xx_pio_txpacket tx_packets_cache[BCM43xx_PIO_MAXTXPACKETS];
88 u16 bcm43xx_pio_read(struct bcm43xx_pioqueue *queue,
91 return bcm43xx_read16(queue->bcm, queue->mmio_base + offset);
95 void bcm43xx_pio_write(struct bcm43xx_pioqueue *queue,
96 u16 offset, u16 value)
98 bcm43xx_write16(queue->bcm, queue->mmio_base + offset, value);
103 int bcm43xx_pio_init(struct bcm43xx_private *bcm);
104 void bcm43xx_pio_free(struct bcm43xx_private *bcm);
106 int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
107 struct ieee80211_txb *txb);
108 void bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
109 struct bcm43xx_xmitstatus *status);
110 void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue);
112 /* Suspend a TX queue on hardware level. */
113 void bcm43xx_pio_tx_suspend(struct bcm43xx_pioqueue *queue);
114 void bcm43xx_pio_tx_resume(struct bcm43xx_pioqueue *queue);
115 /* Suspend (freeze) the TX tasklet (software level). */
116 void bcm43xx_pio_freeze_txqueues(struct bcm43xx_private *bcm);
117 void bcm43xx_pio_thaw_txqueues(struct bcm43xx_private *bcm);
119 #else /* CONFIG_BCM43XX_PIO */
122 int bcm43xx_pio_init(struct bcm43xx_private *bcm)
127 void bcm43xx_pio_free(struct bcm43xx_private *bcm)
131 int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
132 struct ieee80211_txb *txb)
137 void bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
138 struct bcm43xx_xmitstatus *status)
142 void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue)
146 void bcm43xx_pio_tx_suspend(struct bcm43xx_pioqueue *queue)
150 void bcm43xx_pio_tx_resume(struct bcm43xx_pioqueue *queue)
154 void bcm43xx_pio_freeze_txqueues(struct bcm43xx_private *bcm)
158 void bcm43xx_pio_thaw_txqueues(struct bcm43xx_private *bcm)
162 #endif /* CONFIG_BCM43XX_PIO */
163 #endif /* BCM43xx_PIO_H_ */