1 files changed, 138 insertions, 0 deletions

diff --git a/drivers/net/wireless/bcm43xx/bcm43xx_pio.h b/drivers/net/wireless/bcm43xx/bcm43xx_pio.h
new file mode 100644
index 000000000000..970627bc1769
--- /dev/null
+++ b/drivers/net/wireless/bcm43xx/bcm43xx_pio.h
@@ -0,0 +1,138 @@
+#ifndef BCM43xx_PIO_H_
+#define BCM43xx_PIO_H_
+
+#include "bcm43xx.h"
+
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+
+
+#define BCM43xx_PIO_TXCTL               0x00
+#define BCM43xx_PIO_TXDATA              0x02
+#define BCM43xx_PIO_TXQBUFSIZE          0x04
+#define BCM43xx_PIO_RXCTL               0x08
+#define BCM43xx_PIO_RXDATA              0x0A
+
+#define BCM43xx_PIO_TXCTL_WRITEHI       (1 << 0)
+#define BCM43xx_PIO_TXCTL_WRITELO       (1 << 1)
+#define BCM43xx_PIO_TXCTL_COMPLETE      (1 << 2)
+#define BCM43xx_PIO_TXCTL_INIT          (1 << 3)
+#define BCM43xx_PIO_TXCTL_SUSPEND       (1 << 7)
+
+#define BCM43xx_PIO_RXCTL_DATAAVAILABLE (1 << 0)
+#define BCM43xx_PIO_RXCTL_READY         (1 << 1)
+
+/* PIO constants */
+#define BCM43xx_PIO_MAXTXDEVQPACKETS    31
+#define BCM43xx_PIO_TXQADJUST           80
+
+/* PIO tuning knobs */
+#define BCM43xx_PIO_MAXTXPACKETS        256
+
+
+
+#ifdef CONFIG_BCM43XX_PIO
+
+
+struct bcm43xx_pioqueue;
+struct bcm43xx_xmitstatus;
+
+struct bcm43xx_pio_txpacket {
+        struct bcm43xx_pioqueue *queue;
+        struct ieee80211_txb *txb;
+        struct list_head list;
+
+        u8 xmitted_frags;
+        u16 xmitted_octets;
+};
+
+#define pio_txpacket_getindex(packet) ((int)((packet) - (packet)->queue->tx_packets_cache)) 
+
+struct bcm43xx_pioqueue {
+        struct bcm43xx_private *bcm;
+        u16 mmio_base;
+
+        u8 tx_suspended:1,
+           need_workarounds:1; /* 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 bcm43xx_pio_txpacket tx_packets_cache[BCM43xx_PIO_MAXTXPACKETS];
+};
+
+static inline
+u16 bcm43xx_pio_read(struct bcm43xx_pioqueue *queue,
+                     u16 offset)
+{
+        return bcm43xx_read16(queue->bcm, queue->mmio_base + offset);
+}
+
+static inline
+void bcm43xx_pio_write(struct bcm43xx_pioqueue *queue,
+                       u16 offset, u16 value)
+{
+        bcm43xx_write16(queue->bcm, queue->mmio_base + offset, value);
+}
+
+
+int bcm43xx_pio_init(struct bcm43xx_private *bcm);
+void bcm43xx_pio_free(struct bcm43xx_private *bcm);
+
+int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
+                   struct ieee80211_txb *txb);
+void bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
+                                   struct bcm43xx_xmitstatus *status);
+void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue);
+
+#else /* CONFIG_BCM43XX_PIO */
+
+static inline
+int bcm43xx_pio_init(struct bcm43xx_private *bcm)
+{
+        return 0;
+}
+static inline
+void bcm43xx_pio_free(struct bcm43xx_private *bcm)
+{
+}
+static inline
+int bcm43xx_pio_tx(struct bcm43xx_private *bcm,
+                   struct ieee80211_txb *txb)
+{
+        return 0;
+}
+static inline
+void bcm43xx_pio_handle_xmitstatus(struct bcm43xx_private *bcm,
+                                   struct bcm43xx_xmitstatus *status)
+{
+}
+static inline
+void bcm43xx_pio_rx(struct bcm43xx_pioqueue *queue)
+{
+}
+
+#endif /* CONFIG_BCM43XX_PIO */
+#endif /* BCM43xx_PIO_H_ */