ethernet/micrel/ks8851_spi.c

58 #define to_ks8851_spi(ks) container_of((ks), struct ks8851_net_spi, ks8851)
75  * @ks: The chip state
80 static void ks8851_lock_spi(struct ks8851_net *ks, unsigned long *flags)
82 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
89  * @ks: The chip state
94 static void ks8851_unlock_spi(struct ks8851_net *ks, unsigned long *flags)
96 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
110  * @ks: The chip state
116 static void ks8851_wrreg16_spi(struct ks8851_net *ks, unsigned int reg,
119 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
134 		netdev_err(ks->netdev, "spi_sync() failed\n");
139  * @ks: The device state
147 static void ks8851_rdreg(struct ks8851_net *ks, unsigned int op,
150 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
153 	__le16 *txb = (__le16 *)ks->txd;
154 	u8 *trx = ks->rxd;
182 		netdev_err(ks->netdev, "read: spi_sync() failed\n");
191  * @ks: The chip information
196 static unsigned int ks8851_rdreg16_spi(struct ks8851_net *ks, unsigned int reg)
200 	ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2);
206  * @ks: The device state.
213 static void ks8851_rdfifo_spi(struct ks8851_net *ks, u8 *buff, unsigned int len)
215 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
221 	netif_dbg(ks, rx_status, ks->netdev,
238 		netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__);
243  * @ks: The device state.
252 static void ks8851_wrfifo_spi(struct ks8851_net *ks, struct sk_buff *txp,
255 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
261 	netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n",
264 	fid = ks->fid++;
271 	ks->txh.txb[1] = KS_SPIOP_TXFIFO;
272 	ks->txh.txw[1] = cpu_to_le16(fid);
273 	ks->txh.txw[2] = cpu_to_le16(txp->len);
275 	xfer->tx_buf = &ks->txh.txb[1];
286 		netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__);
313 	struct ks8851_net *ks;
319 	ks = &kss->ks8851;
320 	last = skb_queue_empty(&ks->txq);
322 	ks8851_lock_spi(ks, &flags);
325 		txb = skb_dequeue(&ks->txq);
326 		last = skb_queue_empty(&ks->txq);
331 			ks8851_wrreg16_spi(ks, KS_RXQCR,
332 					   ks->rc_rxqcr | RXQCR_SDA);
333 			ks8851_wrfifo_spi(ks, txb, last);
334 			ks8851_wrreg16_spi(ks, KS_RXQCR, ks->rc_rxqcr);
335 			ks8851_wrreg16_spi(ks, KS_TXQCR, TXQCR_METFE);
337 			ks8851_done_tx(ks, txb);
341 	tx_space = ks8851_rdreg16_spi(ks, KS_TXMIR);
343 	spin_lock(&ks->statelock);
344 	ks->queued_len -= dequeued_len;
345 	ks->tx_space = tx_space;
346 	spin_unlock(&ks->statelock);
348 	ks8851_unlock_spi(ks, &flags);
353  * @ks: The device state
355 static void ks8851_flush_tx_work_spi(struct ks8851_net *ks)
357 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
379 	struct ks8851_net *ks = netdev_priv(dev);
383 	kss = to_ks8851_spi(ks);
385 	netif_dbg(ks, tx_queued, ks->netdev,
388 	spin_lock(&ks->statelock);
390 	if (ks->queued_len + needed > ks->tx_space) {
394 		ks->queued_len += needed;
395 		skb_queue_tail(&ks->txq, skb);
398 	spin_unlock(&ks->statelock);
410 	struct ks8851_net *ks;
419 	ks = &kss->ks8851;
421 	ks->lock = ks8851_lock_spi;
422 	ks->unlock = ks8851_unlock_spi;
423 	ks->rdreg16 = ks8851_rdreg16_spi;
424 	ks->wrreg16 = ks8851_wrreg16_spi;
425 	ks->rdfifo = ks8851_rdfifo_spi;
426 	ks->wrfifo = ks8851_wrfifo_spi;
427 	ks->start_xmit = ks8851_start_xmit_spi;
428 	ks->flush_tx_work = ks8851_flush_tx_work_spi;
436 	ks->rc_ier = STD_IRQ;