ethernet/micrel/ks8851_spi.c

56 #define to_ks8851_spi(ks) container_of((ks), struct ks8851_net_spi, ks8851)
73  * @ks: The chip state
78 static void ks8851_lock_spi(struct ks8851_net *ks, unsigned long *flags)
80 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
87  * @ks: The chip state
92 static void ks8851_unlock_spi(struct ks8851_net *ks, unsigned long *flags)
94 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
108  * @ks: The chip state
114 static void ks8851_wrreg16_spi(struct ks8851_net *ks, unsigned int reg,
117 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
132 		netdev_err(ks->netdev, "spi_sync() failed\n");
137  * @ks: The device state
145 static void ks8851_rdreg(struct ks8851_net *ks, unsigned int op,
148 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
151 	__le16 *txb = (__le16 *)ks->txd;
152 	u8 *trx = ks->rxd;
180 		netdev_err(ks->netdev, "read: spi_sync() failed\n");
189  * @ks: The chip information
194 static unsigned int ks8851_rdreg16_spi(struct ks8851_net *ks, unsigned int reg)
198 	ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2);
204  * @ks: The device state.
211 static void ks8851_rdfifo_spi(struct ks8851_net *ks, u8 *buff, unsigned int len)
213 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
219 	netif_dbg(ks, rx_status, ks->netdev,
236 		netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__);
241  * @ks: The device state.
250 static void ks8851_wrfifo_spi(struct ks8851_net *ks, struct sk_buff *txp,
253 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
259 	netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n",
262 	fid = ks->fid++;
269 	ks->txh.txb[1] = KS_SPIOP_TXFIFO;
270 	ks->txh.txw[1] = cpu_to_le16(fid);
271 	ks->txh.txw[2] = cpu_to_le16(txp->len);
273 	xfer->tx_buf = &ks->txh.txb[1];
284 		netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__);
311 	struct ks8851_net *ks;
317 	ks = &kss->ks8851;
318 	last = skb_queue_empty(&ks->txq);
320 	ks8851_lock_spi(ks, &flags);
323 		txb = skb_dequeue(&ks->txq);
324 		last = skb_queue_empty(&ks->txq);
329 			ks8851_wrreg16_spi(ks, KS_RXQCR,
330 					   ks->rc_rxqcr | RXQCR_SDA);
331 			ks8851_wrfifo_spi(ks, txb, last);
332 			ks8851_wrreg16_spi(ks, KS_RXQCR, ks->rc_rxqcr);
333 			ks8851_wrreg16_spi(ks, KS_TXQCR, TXQCR_METFE);
335 			ks8851_done_tx(ks, txb);
339 	tx_space = ks8851_rdreg16_spi(ks, KS_TXMIR);
341 	spin_lock_bh(&ks->statelock);
342 	ks->queued_len -= dequeued_len;
343 	ks->tx_space = tx_space;
344 	spin_unlock_bh(&ks->statelock);
346 	ks8851_unlock_spi(ks, &flags);
351  * @ks: The device state
353 static void ks8851_flush_tx_work_spi(struct ks8851_net *ks)
355 	struct ks8851_net_spi *kss = to_ks8851_spi(ks);
377 	struct ks8851_net *ks = netdev_priv(dev);
381 	kss = to_ks8851_spi(ks);
383 	netif_dbg(ks, tx_queued, ks->netdev,
386 	spin_lock(&ks->statelock);
388 	if (ks->queued_len + needed > ks->tx_space) {
392 		ks->queued_len += needed;
393 		skb_queue_tail(&ks->txq, skb);
396 	spin_unlock(&ks->statelock);
408 	struct ks8851_net *ks;
417 	ks = &kss->ks8851;
419 	ks->lock = ks8851_lock_spi;
420 	ks->unlock = ks8851_unlock_spi;
421 	ks->rdreg16 = ks8851_rdreg16_spi;
422 	ks->wrreg16 = ks8851_wrreg16_spi;
423 	ks->rdfifo = ks8851_rdfifo_spi;
424 	ks->wrfifo = ks8851_wrfifo_spi;
425 	ks->start_xmit = ks8851_start_xmit_spi;
426 	ks->flush_tx_work = ks8851_flush_tx_work_spi;
434 	ks->rc_ier = STD_IRQ;