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Michael Buesch5100d5a2008-03-29 21:01:16 +01001#ifndef B43_PIO_H_
2#define B43_PIO_H_
3
4#include "b43.h"
5
6#include <linux/interrupt.h>
7#include <linux/io.h>
8#include <linux/list.h>
9#include <linux/skbuff.h>
10
11
12/*** Registers for PIO queues up to revision 7. ***/
13/* TX queue. */
14#define B43_PIO_TXCTL 0x00
15#define B43_PIO_TXCTL_WRITELO 0x0001
16#define B43_PIO_TXCTL_WRITEHI 0x0002
17#define B43_PIO_TXCTL_EOF 0x0004
18#define B43_PIO_TXCTL_FREADY 0x0008
19#define B43_PIO_TXCTL_FLUSHREQ 0x0020
20#define B43_PIO_TXCTL_FLUSHPEND 0x0040
21#define B43_PIO_TXCTL_SUSPREQ 0x0080
22#define B43_PIO_TXCTL_QSUSP 0x0100
23#define B43_PIO_TXCTL_COMMCNT 0xFC00
24#define B43_PIO_TXCTL_COMMCNT_SHIFT 10
25#define B43_PIO_TXDATA 0x02
26#define B43_PIO_TXQBUFSIZE 0x04
27/* RX queue. */
28#define B43_PIO_RXCTL 0x00
29#define B43_PIO_RXCTL_FRAMERDY 0x0001
30#define B43_PIO_RXCTL_DATARDY 0x0002
31#define B43_PIO_RXDATA 0x02
32
33/*** Registers for PIO queues revision 8 and later. ***/
34/* TX queue */
35#define B43_PIO8_TXCTL 0x00
36#define B43_PIO8_TXCTL_0_7 0x00000001
37#define B43_PIO8_TXCTL_8_15 0x00000002
38#define B43_PIO8_TXCTL_16_23 0x00000004
39#define B43_PIO8_TXCTL_24_31 0x00000008
40#define B43_PIO8_TXCTL_EOF 0x00000010
41#define B43_PIO8_TXCTL_FREADY 0x00000080
42#define B43_PIO8_TXCTL_SUSPREQ 0x00000100
43#define B43_PIO8_TXCTL_QSUSP 0x00000200
44#define B43_PIO8_TXCTL_FLUSHREQ 0x00000400
45#define B43_PIO8_TXCTL_FLUSHPEND 0x00000800
46#define B43_PIO8_TXDATA 0x04
47/* RX queue */
48#define B43_PIO8_RXCTL 0x00
49#define B43_PIO8_RXCTL_FRAMERDY 0x00000001
50#define B43_PIO8_RXCTL_DATARDY 0x00000002
51#define B43_PIO8_RXDATA 0x04
52
53
54/* The maximum number of TX-packets the HW can handle. */
55#define B43_PIO_MAX_NR_TXPACKETS 32
56
57
58#ifdef CONFIG_B43_PIO
59
60struct b43_pio_txpacket {
61 /* Pointer to the TX queue we belong to. */
62 struct b43_pio_txqueue *queue;
63 /* The TX data packet. */
64 struct sk_buff *skb;
Michael Buesch5100d5a2008-03-29 21:01:16 +010065 /* Index in the (struct b43_pio_txqueue)->packets array. */
66 u8 index;
67
68 struct list_head list;
69};
70
71struct b43_pio_txqueue {
72 struct b43_wldev *dev;
Michael Buesch5100d5a2008-03-29 21:01:16 +010073 u16 mmio_base;
74
75 /* The device queue buffer size in bytes. */
76 u16 buffer_size;
77 /* The number of used bytes in the device queue buffer. */
78 u16 buffer_used;
79 /* The number of packets that can still get queued.
80 * This is decremented on queueing a packet and incremented
81 * after receiving the transmit status. */
82 u16 free_packet_slots;
83
84 /* True, if the mac80211 queue was stopped due to overflow at TX. */
85 bool stopped;
86 /* Our b43 queue index number */
87 u8 index;
88 /* The mac80211 QoS queue priority. */
89 u8 queue_prio;
90
91 /* Buffer for TX packet meta data. */
92 struct b43_pio_txpacket packets[B43_PIO_MAX_NR_TXPACKETS];
93 struct list_head packets_list;
94
95 /* Total number of transmitted packets. */
96 unsigned int nr_tx_packets;
97
98 /* Shortcut to the 802.11 core revision. This is to
99 * avoid horrible pointer dereferencing in the fastpaths. */
100 u8 rev;
101};
102
103struct b43_pio_rxqueue {
104 struct b43_wldev *dev;
Michael Buesch5100d5a2008-03-29 21:01:16 +0100105 u16 mmio_base;
106
Michael Buesch5100d5a2008-03-29 21:01:16 +0100107 /* Shortcut to the 802.11 core revision. This is to
108 * avoid horrible pointer dereferencing in the fastpaths. */
109 u8 rev;
110};
111
112
113static inline u16 b43_piotx_read16(struct b43_pio_txqueue *q, u16 offset)
114{
115 return b43_read16(q->dev, q->mmio_base + offset);
116}
117
118static inline u32 b43_piotx_read32(struct b43_pio_txqueue *q, u16 offset)
119{
120 return b43_read32(q->dev, q->mmio_base + offset);
121}
122
123static inline void b43_piotx_write16(struct b43_pio_txqueue *q,
124 u16 offset, u16 value)
125{
126 b43_write16(q->dev, q->mmio_base + offset, value);
127}
128
129static inline void b43_piotx_write32(struct b43_pio_txqueue *q,
130 u16 offset, u32 value)
131{
132 b43_write32(q->dev, q->mmio_base + offset, value);
133}
134
135
136static inline u16 b43_piorx_read16(struct b43_pio_rxqueue *q, u16 offset)
137{
138 return b43_read16(q->dev, q->mmio_base + offset);
139}
140
141static inline u32 b43_piorx_read32(struct b43_pio_rxqueue *q, u16 offset)
142{
143 return b43_read32(q->dev, q->mmio_base + offset);
144}
145
146static inline void b43_piorx_write16(struct b43_pio_rxqueue *q,
147 u16 offset, u16 value)
148{
149 b43_write16(q->dev, q->mmio_base + offset, value);
150}
151
152static inline void b43_piorx_write32(struct b43_pio_rxqueue *q,
153 u16 offset, u32 value)
154{
155 b43_write32(q->dev, q->mmio_base + offset, value);
156}
157
158
159int b43_pio_init(struct b43_wldev *dev);
Michael Buesch5100d5a2008-03-29 21:01:16 +0100160void b43_pio_free(struct b43_wldev *dev);
161
Johannes Berge039fa42008-05-15 12:55:29 +0200162int b43_pio_tx(struct b43_wldev *dev, struct sk_buff *skb);
Michael Buesch5100d5a2008-03-29 21:01:16 +0100163void b43_pio_handle_txstatus(struct b43_wldev *dev,
164 const struct b43_txstatus *status);
165void b43_pio_get_tx_stats(struct b43_wldev *dev,
166 struct ieee80211_tx_queue_stats *stats);
167void b43_pio_rx(struct b43_pio_rxqueue *q);
168
169void b43_pio_tx_suspend(struct b43_wldev *dev);
170void b43_pio_tx_resume(struct b43_wldev *dev);
171
172
173#else /* CONFIG_B43_PIO */
174
175
176static inline int b43_pio_init(struct b43_wldev *dev)
177{
178 return 0;
179}
180static inline void b43_pio_free(struct b43_wldev *dev)
181{
182}
183static inline void b43_pio_stop(struct b43_wldev *dev)
184{
185}
186static inline int b43_pio_tx(struct b43_wldev *dev,
Johannes Berge039fa42008-05-15 12:55:29 +0200187 struct sk_buff *skb)
Michael Buesch5100d5a2008-03-29 21:01:16 +0100188{
189 return 0;
190}
191static inline void b43_pio_handle_txstatus(struct b43_wldev *dev,
192 const struct b43_txstatus *status)
193{
194}
195static inline void b43_pio_get_tx_stats(struct b43_wldev *dev,
196 struct ieee80211_tx_queue_stats *stats)
197{
198}
199static inline void b43_pio_rx(struct b43_pio_rxqueue *q)
200{
201}
202static inline void b43_pio_tx_suspend(struct b43_wldev *dev)
203{
204}
205static inline void b43_pio_tx_resume(struct b43_wldev *dev)
206{
207}
208
209#endif /* CONFIG_B43_PIO */
210#endif /* B43_PIO_H_ */