Merge branch 'net-ks8851-Unify-KS8851-SPI-and-MLL-drivers'

Marek Vasut says:

====================
net: ks8851: Unify KS8851 SPI and MLL drivers

The KS8851SNL/SNLI and KS8851-16MLL/MLLI/MLLU are very much the same pieces
of silicon, except the former has an SPI interface, while the later has a
parallel bus interface. Thus far, Linux has two separate drivers for each
and they are diverging considerably.

This series unifies them into a single driver with small SPI and parallel
bus specific parts. The approach here is to first separate out the SPI
specific parts into a separate file, then add parallel bus accessors in
another separate file and then finally remove the old parallel bus driver.
The reason for replacing the old parallel bus driver is because the SPI
bus driver is much higher quality.

Note that I dropped "net: ks8851: Drop define debug and pr_fmt()" for now,
will send it separatelly later.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/micrel/Kconfig

@@ -38,6 +38,8 @@ config KS8851_MLL
 	tristate "Micrel KS8851 MLL"
 	depends on HAS_IOMEM
 	select MII
+	select CRC32
+	select EEPROM_93CX6
 	---help---
 	  This platform driver is for Micrel KS8851 Address/data bus
 	  multiplexed network chip.

drivers/net/ethernet/micrel/Makefile

@@ -5,5 +5,7 @@
 
 obj-$(CONFIG_KS8842) += ks8842.o
 obj-$(CONFIG_KS8851) += ks8851.o
+ks8851-objs = ks8851_common.o ks8851_spi.o
 obj-$(CONFIG_KS8851_MLL) += ks8851_mll.o
+ks8851_mll-objs = ks8851_common.o ks8851_par.o
 obj-$(CONFIG_KSZ884X_PCI) += ksz884x.o

drivers/net/ethernet/micrel/ks8851.h

@@ -7,6 +7,11 @@
  * KS8851 register definitions
 */
 
+#ifndef __KS8851_H__
+#define __KS8851_H__
+
+#include <linux/eeprom_93cx6.h>
+
 #define KS_CCR					0x08
 #define CCR_LE					(1 << 10)   /* KSZ8851-16MLL */
 #define CCR_EEPROM				(1 << 9)
@@ -19,7 +24,7 @@
 #define CCR_32PIN				(1 << 0)    /* KSZ8851SNL    */
 
 /* MAC address registers */
-#define KS_MAR(_m)				(0x15 - (_m))
+#define KS_MAR(_m)				(0x14 - (_m))
 #define KS_MARL					0x10
 #define KS_MARM					0x12
 #define KS_MARH					0x14
@@ -300,3 +305,147 @@
 #define TXFR_TXIC				(1 << 15)
 #define TXFR_TXFID_MASK				(0x3f << 0)
 #define TXFR_TXFID_SHIFT			(0)
+
+/**
+ * struct ks8851_rxctrl - KS8851 driver rx control
+ * @mchash: Multicast hash-table data.
+ * @rxcr1: KS_RXCR1 register setting
+ * @rxcr2: KS_RXCR2 register setting
+ *
+ * Representation of the settings needs to control the receive filtering
+ * such as the multicast hash-filter and the receive register settings. This
+ * is used to make the job of working out if the receive settings change and
+ * then issuing the new settings to the worker that will send the necessary
+ * commands.
+ */
+struct ks8851_rxctrl {
+	u16	mchash[4];
+	u16	rxcr1;
+	u16	rxcr2;
+};
+
+/**
+ * union ks8851_tx_hdr - tx header data
+ * @txb: The header as bytes
+ * @txw: The header as 16bit, little-endian words
+ *
+ * A dual representation of the tx header data to allow
+ * access to individual bytes, and to allow 16bit accesses
+ * with 16bit alignment.
+ */
+union ks8851_tx_hdr {
+	u8	txb[6];
+	__le16	txw[3];
+};
+
+/**
+ * struct ks8851_net - KS8851 driver private data
+ * @netdev: The network device we're bound to
+ * @statelock: Lock on this structure for tx list.
+ * @mii: The MII state information for the mii calls.
+ * @rxctrl: RX settings for @rxctrl_work.
+ * @rxctrl_work: Work queue for updating RX mode and multicast lists
+ * @txq: Queue of packets for transmission.
+ * @txh: Space for generating packet TX header in DMA-able data
+ * @rxd: Space for receiving SPI data, in DMA-able space.
+ * @txd: Space for transmitting SPI data, in DMA-able space.
+ * @msg_enable: The message flags controlling driver output (see ethtool).
+ * @fid: Incrementing frame id tag.
+ * @rc_ier: Cached copy of KS_IER.
+ * @rc_ccr: Cached copy of KS_CCR.
+ * @rc_rxqcr: Cached copy of KS_RXQCR.
+ * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM.
+ * @vdd_reg:	Optional regulator supplying the chip
+ * @vdd_io: Optional digital power supply for IO
+ * @gpio: Optional reset_n gpio
+ * @lock: Bus access lock callback
+ * @unlock: Bus access unlock callback
+ * @rdreg16: 16bit register read callback
+ * @wrreg16: 16bit register write callback
+ * @rdfifo: FIFO read callback
+ * @wrfifo: FIFO write callback
+ * @start_xmit: start_xmit() implementation callback
+ * @rx_skb: rx_skb() implementation callback
+ * @flush_tx_work: flush_tx_work() implementation callback
+ *
+ * The @statelock is used to protect information in the structure which may
+ * need to be accessed via several sources, such as the network driver layer
+ * or one of the work queues.
+ *
+ * We align the buffers we may use for rx/tx to ensure that if the SPI driver
+ * wants to DMA map them, it will not have any problems with data the driver
+ * modifies.
+ */
+struct ks8851_net {
+	struct net_device	*netdev;
+	spinlock_t		statelock;
+
+	union ks8851_tx_hdr	txh ____cacheline_aligned;
+	u8			rxd[8];
+	u8			txd[8];
+
+	u32			msg_enable ____cacheline_aligned;
+	u16			tx_space;
+	u8			fid;
+
+	u16			rc_ier;
+	u16			rc_rxqcr;
+	u16			rc_ccr;
+
+	struct mii_if_info	mii;
+	struct ks8851_rxctrl	rxctrl;
+
+	struct work_struct	rxctrl_work;
+
+	struct sk_buff_head	txq;
+
+	struct eeprom_93cx6	eeprom;
+	struct regulator	*vdd_reg;
+	struct regulator	*vdd_io;
+	int			gpio;
+
+	void			(*lock)(struct ks8851_net *ks,
+					unsigned long *flags);
+	void			(*unlock)(struct ks8851_net *ks,
+					  unsigned long *flags);
+	unsigned int		(*rdreg16)(struct ks8851_net *ks,
+					   unsigned int reg);
+	void			(*wrreg16)(struct ks8851_net *ks,
+					   unsigned int reg, unsigned int val);
+	void			(*rdfifo)(struct ks8851_net *ks, u8 *buff,
+					  unsigned int len);
+	void			(*wrfifo)(struct ks8851_net *ks,
+					  struct sk_buff *txp, bool irq);
+	netdev_tx_t		(*start_xmit)(struct sk_buff *skb,
+					      struct net_device *dev);
+	void			(*rx_skb)(struct ks8851_net *ks,
+					  struct sk_buff *skb);
+	void			(*flush_tx_work)(struct ks8851_net *ks);
+};
+
+int ks8851_probe_common(struct net_device *netdev, struct device *dev,
+			int msg_en);
+int ks8851_remove_common(struct device *dev);
+int ks8851_suspend(struct device *dev);
+int ks8851_resume(struct device *dev);
+
+static __maybe_unused SIMPLE_DEV_PM_OPS(ks8851_pm_ops,
+					ks8851_suspend, ks8851_resume);
+
+/**
+ * ks8851_done_tx - update and then free skbuff after transmitting
+ * @ks: The device state
+ * @txb: The buffer transmitted
+ */
+static void __maybe_unused ks8851_done_tx(struct ks8851_net *ks,
+					  struct sk_buff *txb)
+{
+	struct net_device *dev = ks->netdev;
+
+	dev->stats.tx_bytes += txb->len;
+	dev->stats.tx_packets++;
+
+	dev_kfree_skb(txb);
+}
+
+#endif /* __KS8851_H__ */