1 files changed, 172 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43legacy/pio.h b/drivers/net/wireless/b43legacy/pio.h
new file mode 100644
index 000000000000..5bfed0c40030
--- /dev/null
+++ b/drivers/net/wireless/b43legacy/pio.h
@@ -0,0 +1,172 @@
+#ifndef B43legacy_PIO_H_
+#define B43legacy_PIO_H_
+
+#include "b43legacy.h"
+
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+
+
+#define B43legacy_PIO_TXCTL             0x00
+#define B43legacy_PIO_TXDATA            0x02
+#define B43legacy_PIO_TXQBUFSIZE        0x04
+#define B43legacy_PIO_RXCTL             0x08
+#define B43legacy_PIO_RXDATA            0x0A
+
+#define B43legacy_PIO_TXCTL_WRITELO     (1 << 0)
+#define B43legacy_PIO_TXCTL_WRITEHI     (1 << 1)
+#define B43legacy_PIO_TXCTL_COMPLETE    (1 << 2)
+#define B43legacy_PIO_TXCTL_INIT        (1 << 3)
+#define B43legacy_PIO_TXCTL_SUSPEND     (1 << 7)
+
+#define B43legacy_PIO_RXCTL_DATAAVAILABLE       (1 << 0)
+#define B43legacy_PIO_RXCTL_READY               (1 << 1)
+
+/* PIO constants */
+#define B43legacy_PIO_MAXTXDEVQPACKETS  31
+#define B43legacy_PIO_TXQADJUST         80
+
+/* PIO tuning knobs */
+#define B43legacy_PIO_MAXTXPACKETS      256
+
+
+
+#ifdef CONFIG_B43LEGACY_PIO
+
+
+struct b43legacy_pioqueue;
+struct b43legacy_xmitstatus;
+
+struct b43legacy_pio_txpacket {
+        struct b43legacy_pioqueue *queue;
+        struct sk_buff *skb;
+        struct ieee80211_tx_status txstat;
+        struct list_head list;
+};
+
+#define pio_txpacket_getindex(packet) ((int)((packet) - \
+                              (packet)->queue->tx_packets_cache))
+
+struct b43legacy_pioqueue {
+        struct b43legacy_wldev *dev;
+        u16 mmio_base;
+
+        bool tx_suspended;
+        bool tx_frozen;
+        bool need_workarounds; /* Workarounds needed for core.rev < 3 */
+
+        /* Adjusted size of the device internal TX buffer. */
+        u16 tx_devq_size;
+        /* Used octets of the device internal TX buffer. */
+        u16 tx_devq_used;
+        /* Used packet slots in the device internal TX buffer. */
+        u8 tx_devq_packets;
+        /* Packets from the txfree list can
+         * be taken on incoming TX requests.
+         */
+        struct list_head txfree;
+        unsigned int nr_txfree;
+        /* Packets on the txqueue are queued,
+         * but not completely written to the chip, yet.
+         */
+        struct list_head txqueue;
+        /* Packets on the txrunning queue are completely
+         * posted to the device. We are waiting for the txstatus.
+         */
+        struct list_head txrunning;
+        /* Total number or packets sent.
+         * (This counter can obviously wrap).
+         */
+        unsigned int nr_tx_packets;
+        struct tasklet_struct txtask;
+        struct b43legacy_pio_txpacket
+                         tx_packets_cache[B43legacy_PIO_MAXTXPACKETS];
+};
+
+static inline
+u16 b43legacy_pio_read(struct b43legacy_pioqueue *queue,
+                     u16 offset)
+{
+        return b43legacy_read16(queue->dev, queue->mmio_base + offset);
+}
+
+static inline
+void b43legacy_pio_write(struct b43legacy_pioqueue *queue,
+                       u16 offset, u16 value)
+{
+        b43legacy_write16(queue->dev, queue->mmio_base + offset, value);
+        mmiowb();
+}
+
+
+int b43legacy_pio_init(struct b43legacy_wldev *dev);
+void b43legacy_pio_free(struct b43legacy_wldev *dev);
+
+int b43legacy_pio_tx(struct b43legacy_wldev *dev,
+                   struct sk_buff *skb,
+                   struct ieee80211_tx_control *ctl);
+void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev,
+                                 const struct b43legacy_txstatus *status);
+void b43legacy_pio_get_tx_stats(struct b43legacy_wldev *dev,
+                              struct ieee80211_tx_queue_stats *stats);
+void b43legacy_pio_rx(struct b43legacy_pioqueue *queue);
+
+/* Suspend TX queue in hardware. */
+void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue);
+void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue);
+/* Suspend (freeze) the TX tasklet (software level). */
+void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev);
+void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev);
+
+#else /* CONFIG_B43LEGACY_PIO */
+
+static inline
+int b43legacy_pio_init(struct b43legacy_wldev *dev)
+{
+        return 0;
+}
+static inline
+void b43legacy_pio_free(struct b43legacy_wldev *dev)
+{
+}
+static inline
+int b43legacy_pio_tx(struct b43legacy_wldev *dev,
+                   struct sk_buff *skb,
+                   struct ieee80211_tx_control *ctl)
+{
+        return 0;
+}
+static inline
+void b43legacy_pio_handle_txstatus(struct b43legacy_wldev *dev,
+                                 const struct b43legacy_txstatus *status)
+{
+}
+static inline
+void b43legacy_pio_get_tx_stats(struct b43legacy_wldev *dev,
+                              struct ieee80211_tx_queue_stats *stats)
+{
+}
+static inline
+void b43legacy_pio_rx(struct b43legacy_pioqueue *queue)
+{
+}
+static inline
+void b43legacy_pio_tx_suspend(struct b43legacy_pioqueue *queue)
+{
+}
+static inline
+void b43legacy_pio_tx_resume(struct b43legacy_pioqueue *queue)
+{
+}
+static inline
+void b43legacy_pio_freeze_txqueues(struct b43legacy_wldev *dev)
+{
+}
+static inline
+void b43legacy_pio_thaw_txqueues(struct b43legacy_wldev *dev)
+{
+}
+
+#endif /* CONFIG_B43LEGACY_PIO */
+#endif /* B43legacy_PIO_H_ */