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1 | #ifndef B43legacy_PIO_H_ |
2 | #define B43legacy_PIO_H_ | |
3 | ||
4 | #include "b43legacy.h" | |
5 | ||
6 | #include <linux/interrupt.h> | |
7 | #include <linux/list.h> | |
8 | #include <linux/skbuff.h> | |
9 | ||
10 | ||
11 | #define B43legacy_PIO_TXCTL 0x00 | |
12 | #define B43legacy_PIO_TXDATA 0x02 | |
13 | #define B43legacy_PIO_TXQBUFSIZE 0x04 | |
14 | #define B43legacy_PIO_RXCTL 0x08 | |
15 | #define B43legacy_PIO_RXDATA 0x0A | |
16 | ||
17 | #define B43legacy_PIO_TXCTL_WRITELO (1 << 0) | |
18 | #define B43legacy_PIO_TXCTL_WRITEHI (1 << 1) | |
19 | #define B43legacy_PIO_TXCTL_COMPLETE (1 << 2) | |
20 | #define B43legacy_PIO_TXCTL_INIT (1 << 3) | |
21 | #define B43legacy_PIO_TXCTL_SUSPEND (1 << 7) | |
22 | ||
23 | #define B43legacy_PIO_RXCTL_DATAAVAILABLE (1 << 0) | |
24 | #define B43legacy_PIO_RXCTL_READY (1 << 1) | |
25 | ||
26 | /* PIO constants */ | |
27 | #define B43legacy_PIO_MAXTXDEVQPACKETS 31 | |
28 | #define B43legacy_PIO_TXQADJUST 80 | |
29 | ||
30 | /* PIO tuning knobs */ | |
31 | #define B43legacy_PIO_MAXTXPACKETS 256 | |
32 | ||
33 | ||
34 | ||
35 | #ifdef CONFIG_B43LEGACY_PIO | |
36 | ||
37 | ||
38 | struct b43legacy_pioqueue; | |
39 | struct b43legacy_xmitstatus; | |
40 | ||
41 | struct b43legacy_pio_txpacket { | |
42 | struct b43legacy_pioqueue *queue; | |
43 | struct sk_buff *skb; | |
75388acd LF |
44 | struct list_head list; |
45 | }; | |
46 | ||
47 | #define pio_txpacket_getindex(packet) ((int)((packet) - \ | |
48 | (packet)->queue->tx_packets_cache)) | |
49 | ||
50 | struct b43legacy_pioqueue { | |
51 | struct b43legacy_wldev *dev; | |
52 | u16 mmio_base; | |
53 | ||
54 | bool tx_suspended; | |
55 | bool tx_frozen; | |
56 | bool need_workarounds; /* Workarounds needed for core.rev < 3 */ | |
57 | ||
58 | /* Adjusted size of the device internal TX buffer. */ | |
59 | u16 tx_devq_size; | |
60 | /* Used octets of the device internal TX buffer. */ | |
61 | u16 tx_devq_used; | |
62 | /* Used packet slots in the device internal TX buffer. */ | |
63 | u8 tx_devq_packets; | |
64 | /* Packets from the txfree list can | |
65 | * be taken on incoming TX requests. | |
66 | */ | |
67 | struct list_head txfree; | |
68 | unsigned int nr_txfree; | |
69 | /* Packets on the txqueue are queued, | |
70 | * but not completely written to the chip, yet. | |
71 | */ | |
72 | struct list_head txqueue; | |
73 | /* Packets on the txrunning queue are completely | |
74 | * posted to the device. We are waiting for the txstatus. | |
75 | */ | |
76 | struct list_head txrunning; | |
75388acd LF |
77 | struct tasklet_struct txtask; |
78 | struct b43legacy_pio_txpacket | |
79 | tx_packets_cache[B43legacy_PIO_MAXTXPACKETS]; | |
80 | }; | |
81 | ||
82 | static inline | |
83 | u16 b43legacy_pio_read(struct b43legacy_pioqueue *queue, | |
84 | u16 offset) | |
85 | { | |
86 | return b43legacy_read16(queue->dev, queue->mmio_base + offset); | |
87 | } | |
88 | ||
89 | static inline | |
90 | void b43legacy_pio_write(struct b43legacy_pioqueue *queue, | |
91 | u16 offset, u16 value) | |
92 | { | |
93 | b43legacy_write16(queue->dev, queue->mmio_base + offset, value); | |
94 | mmiowb(); | |
95 | } | |
96 | ||
97 | ||
98 | int b43legacy_pio_init(struct b43legacy_wldev *dev); | |
99 | void b43legacy_pio_free(struct b43legacy_wldev *dev); | |
100 | ||
101 | int b43legacy_pio_tx(struct b43legacy_wldev *dev, | |
e039fa4a | 102 | struct sk_buff *skb); |
75388acd LF |
103 | void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev, |
104 | const struct b43legacy_txstatus *status); | |
75388acd LF |
105 | void b43legacy_pio_rx(struct b43legacy_pioqueue *queue); |
106 | ||
107 | /* Suspend TX queue in hardware. */ | |
108 | void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue); | |
109 | void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue); | |
110 | /* Suspend (freeze) the TX tasklet (software level). */ | |
111 | void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev); | |
112 | void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev); | |
113 | ||
114 | #else /* CONFIG_B43LEGACY_PIO */ | |
115 | ||
116 | static inline | |
117 | int b43legacy_pio_init(struct b43legacy_wldev *dev) | |
118 | { | |
119 | return 0; | |
120 | } | |
121 | static inline | |
122 | void b43legacy_pio_free(struct b43legacy_wldev *dev) | |
123 | { | |
124 | } | |
125 | static inline | |
126 | int b43legacy_pio_tx(struct b43legacy_wldev *dev, | |
553381c4 | 127 | struct sk_buff *skb) |
75388acd LF |
128 | { |
129 | return 0; | |
130 | } | |
131 | static inline | |
132 | void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev, | |
133 | const struct b43legacy_txstatus *status) | |
134 | { | |
135 | } | |
136 | static inline | |
75388acd LF |
137 | void b43legacy_pio_rx(struct b43legacy_pioqueue *queue) |
138 | { | |
139 | } | |
140 | static inline | |
141 | void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue) | |
142 | { | |
143 | } | |
144 | static inline | |
145 | void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue) | |
146 | { | |
147 | } | |
148 | static inline | |
149 | void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev) | |
150 | { | |
151 | } | |
152 | static inline | |
153 | void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev) | |
154 | { | |
155 | } | |
156 | ||
157 | #endif /* CONFIG_B43LEGACY_PIO */ | |
158 | #endif /* B43legacy_PIO_H_ */ |