net: add ENC28J60 support

ENC28J60 is a stand-alone Ethernet controller with SPI Interface
and integrated 10BASE-T PHY.

This driver was ported from linux-3.15.

The most notable barebox driver version changes:
  * add device tree support;
  * drop netif_msg_*() debug level checking;
  * use IF_ENABLED for checking CONFIG_ENC28J60_WRITEVERIFY;
  * add mii_bus support.

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 307 insertions, 0 deletions

diff --git a/drivers/net/enc28j60_hw.h b/drivers/net/enc28j60_hw.h
new file mode 100644
index 0000000000..4c023c8aaa
--- /dev/null
+++ b/drivers/net/enc28j60_hw.h
@@ -0,0 +1,307 @@
+/*
+ * enc28j60_hw.h: EDTP FrameThrower style enc28j60 registers
+ */
+
+#ifndef _ENC28J60_HW_H
+#define _ENC28J60_HW_H
+
+/*
+ * ENC28J60 Control Registers
+ * Control register definitions are a combination of address,
+ * bank number, and Ethernet/MAC/PHY indicator bits.
+ * - Register address	(bits 0-4)
+ * - Bank number	(bits 5-6)
+ * - MAC/MII indicator	(bit 7)
+ */
+#define ADDR_MASK	0x1F
+#define BANK_MASK	0x60
+#define SPRD_MASK	0x80
+/* All-bank registers */
+#define EIE		0x1B
+#define EIR		0x1C
+#define ESTAT		0x1D
+#define ECON2		0x1E
+#define ECON1		0x1F
+/* Bank 0 registers */
+#define ERDPTL		(0x00|0x00)
+#define ERDPTH		(0x01|0x00)
+#define EWRPTL		(0x02|0x00)
+#define EWRPTH		(0x03|0x00)
+#define ETXSTL		(0x04|0x00)
+#define ETXSTH		(0x05|0x00)
+#define ETXNDL		(0x06|0x00)
+#define ETXNDH		(0x07|0x00)
+#define ERXSTL		(0x08|0x00)
+#define ERXSTH		(0x09|0x00)
+#define ERXNDL		(0x0A|0x00)
+#define ERXNDH		(0x0B|0x00)
+#define ERXRDPTL	(0x0C|0x00)
+#define ERXRDPTH	(0x0D|0x00)
+#define ERXWRPTL	(0x0E|0x00)
+#define ERXWRPTH	(0x0F|0x00)
+#define EDMASTL		(0x10|0x00)
+#define EDMASTH		(0x11|0x00)
+#define EDMANDL		(0x12|0x00)
+#define EDMANDH		(0x13|0x00)
+#define EDMADSTL	(0x14|0x00)
+#define EDMADSTH	(0x15|0x00)
+#define EDMACSL		(0x16|0x00)
+#define EDMACSH		(0x17|0x00)
+/* Bank 1 registers */
+#define EHT0		(0x00|0x20)
+#define EHT1		(0x01|0x20)
+#define EHT2		(0x02|0x20)
+#define EHT3		(0x03|0x20)
+#define EHT4		(0x04|0x20)
+#define EHT5		(0x05|0x20)
+#define EHT6		(0x06|0x20)
+#define EHT7		(0x07|0x20)
+#define EPMM0		(0x08|0x20)
+#define EPMM1		(0x09|0x20)
+#define EPMM2		(0x0A|0x20)
+#define EPMM3		(0x0B|0x20)
+#define EPMM4		(0x0C|0x20)
+#define EPMM5		(0x0D|0x20)
+#define EPMM6		(0x0E|0x20)
+#define EPMM7		(0x0F|0x20)
+#define EPMCSL		(0x10|0x20)
+#define EPMCSH		(0x11|0x20)
+#define EPMOL		(0x14|0x20)
+#define EPMOH		(0x15|0x20)
+#define EWOLIE		(0x16|0x20)
+#define EWOLIR		(0x17|0x20)
+#define ERXFCON		(0x18|0x20)
+#define EPKTCNT		(0x19|0x20)
+/* Bank 2 registers */
+#define MACON1		(0x00|0x40|SPRD_MASK)
+/* #define MACON2	(0x01|0x40|SPRD_MASK) */
+#define MACON3		(0x02|0x40|SPRD_MASK)
+#define MACON4		(0x03|0x40|SPRD_MASK)
+#define MABBIPG		(0x04|0x40|SPRD_MASK)
+#define MAIPGL		(0x06|0x40|SPRD_MASK)
+#define MAIPGH		(0x07|0x40|SPRD_MASK)
+#define MACLCON1	(0x08|0x40|SPRD_MASK)
+#define MACLCON2	(0x09|0x40|SPRD_MASK)
+#define MAMXFLL		(0x0A|0x40|SPRD_MASK)
+#define MAMXFLH		(0x0B|0x40|SPRD_MASK)
+#define MAPHSUP		(0x0D|0x40|SPRD_MASK)
+#define MICON		(0x11|0x40|SPRD_MASK)
+#define MICMD		(0x12|0x40|SPRD_MASK)
+#define MIREGADR	(0x14|0x40|SPRD_MASK)
+#define MIWRL		(0x16|0x40|SPRD_MASK)
+#define MIWRH		(0x17|0x40|SPRD_MASK)
+#define MIRDL		(0x18|0x40|SPRD_MASK)
+#define MIRDH		(0x19|0x40|SPRD_MASK)
+/* Bank 3 registers */
+#define MAADR1		(0x00|0x60|SPRD_MASK)
+#define MAADR0		(0x01|0x60|SPRD_MASK)
+#define MAADR3		(0x02|0x60|SPRD_MASK)
+#define MAADR2		(0x03|0x60|SPRD_MASK)
+#define MAADR5		(0x04|0x60|SPRD_MASK)
+#define MAADR4		(0x05|0x60|SPRD_MASK)
+#define EBSTSD		(0x06|0x60)
+#define EBSTCON		(0x07|0x60)
+#define EBSTCSL		(0x08|0x60)
+#define EBSTCSH		(0x09|0x60)
+#define MISTAT		(0x0A|0x60|SPRD_MASK)
+#define EREVID		(0x12|0x60)
+#define ECOCON		(0x15|0x60)
+#define EFLOCON		(0x17|0x60)
+#define EPAUSL		(0x18|0x60)
+#define EPAUSH		(0x19|0x60)
+/* PHY registers */
+#define PHCON1		0x00
+#define PHSTAT1		0x01
+#define PHHID1		0x02
+#define PHHID2		0x03
+#define PHCON2		0x10
+#define PHSTAT2		0x11
+#define PHIE		0x12
+#define PHIR		0x13
+#define PHLCON		0x14
+
+/* ENC28J60 EIE Register Bit Definitions */
+#define EIE_INTIE	0x80
+#define EIE_PKTIE	0x40
+#define EIE_DMAIE	0x20
+#define EIE_LINKIE	0x10
+#define EIE_TXIE	0x08
+/* #define EIE_WOLIE	0x04 (reserved) */
+#define EIE_TXERIE	0x02
+#define EIE_RXERIE	0x01
+/* ENC28J60 EIR Register Bit Definitions */
+#define EIR_PKTIF	0x40
+#define EIR_DMAIF	0x20
+#define EIR_LINKIF	0x10
+#define EIR_TXIF	0x08
+/* #define EIR_WOLIF	0x04 (reserved) */
+#define EIR_TXERIF	0x02
+#define EIR_RXERIF	0x01
+/* ENC28J60 ESTAT Register Bit Definitions */
+#define ESTAT_INT	0x80
+#define ESTAT_LATECOL	0x10
+#define ESTAT_RXBUSY	0x04
+#define ESTAT_TXABRT	0x02
+#define ESTAT_CLKRDY	0x01
+/* ENC28J60 ECON2 Register Bit Definitions */
+#define ECON2_AUTOINC	0x80
+#define ECON2_PKTDEC	0x40
+#define ECON2_PWRSV	0x20
+#define ECON2_VRPS	0x08
+/* ENC28J60 ECON1 Register Bit Definitions */
+#define ECON1_TXRST	0x80
+#define ECON1_RXRST	0x40
+#define ECON1_DMAST	0x20
+#define ECON1_CSUMEN	0x10
+#define ECON1_TXRTS	0x08
+#define ECON1_RXEN	0x04
+#define ECON1_BSEL1	0x02
+#define ECON1_BSEL0	0x01
+/* ENC28J60 MACON1 Register Bit Definitions */
+#define MACON1_LOOPBK	0x10
+#define MACON1_TXPAUS	0x08
+#define MACON1_RXPAUS	0x04
+#define MACON1_PASSALL	0x02
+#define MACON1_MARXEN	0x01
+/* ENC28J60 MACON2 Register Bit Definitions */
+#define MACON2_MARST	0x80
+#define MACON2_RNDRST	0x40
+#define MACON2_MARXRST	0x08
+#define MACON2_RFUNRST	0x04
+#define MACON2_MATXRST	0x02
+#define MACON2_TFUNRST	0x01
+/* ENC28J60 MACON3 Register Bit Definitions */
+#define MACON3_PADCFG2	0x80
+#define MACON3_PADCFG1	0x40
+#define MACON3_PADCFG0	0x20
+#define MACON3_TXCRCEN	0x10
+#define MACON3_PHDRLEN	0x08
+#define MACON3_HFRMLEN	0x04
+#define MACON3_FRMLNEN	0x02
+#define MACON3_FULDPX	0x01
+/* ENC28J60 MICMD Register Bit Definitions */
+#define MICMD_MIISCAN	0x02
+#define MICMD_MIIRD	0x01
+/* ENC28J60 MISTAT Register Bit Definitions */
+#define MISTAT_NVALID	0x04
+#define MISTAT_SCAN	0x02
+#define MISTAT_BUSY	0x01
+/* ENC28J60 ERXFCON Register Bit Definitions */
+#define ERXFCON_UCEN	0x80
+#define ERXFCON_ANDOR	0x40
+#define ERXFCON_CRCEN	0x20
+#define ERXFCON_PMEN	0x10
+#define ERXFCON_MPEN	0x08
+#define ERXFCON_HTEN	0x04
+#define ERXFCON_MCEN	0x02
+#define ERXFCON_BCEN	0x01
+
+/* ENC28J60 PHY PHCON1 Register Bit Definitions */
+#define PHCON1_PRST	0x8000
+#define PHCON1_PLOOPBK	0x4000
+#define PHCON1_PPWRSV	0x0800
+#define PHCON1_PDPXMD	0x0100
+/* ENC28J60 PHY PHSTAT1 Register Bit Definitions */
+#define PHSTAT1_PFDPX	0x1000
+#define PHSTAT1_PHDPX	0x0800
+#define PHSTAT1_LLSTAT	0x0004
+#define PHSTAT1_JBSTAT	0x0002
+/* ENC28J60 PHY PHSTAT2 Register Bit Definitions */
+#define PHSTAT2_TXSTAT	(1 << 13)
+#define PHSTAT2_RXSTAT	(1 << 12)
+#define PHSTAT2_COLSTAT	(1 << 11)
+#define PHSTAT2_LSTAT	(1 << 10)
+#define PHSTAT2_DPXSTAT	(1 << 9)
+#define PHSTAT2_PLRITY	(1 << 5)
+/* ENC28J60 PHY PHCON2 Register Bit Definitions */
+#define PHCON2_FRCLINK	0x4000
+#define PHCON2_TXDIS	0x2000
+#define PHCON2_JABBER	0x0400
+#define PHCON2_HDLDIS	0x0100
+/* ENC28J60 PHY PHIE Register Bit Definitions */
+#define PHIE_PLNKIE	(1 << 4)
+#define PHIE_PGEIE	(1 << 1)
+/* ENC28J60 PHY PHIR Register Bit Definitions */
+#define PHIR_PLNKIF	(1 << 4)
+#define PHIR_PGEIF	(1 << 1)
+
+/* ENC28J60 Packet Control Byte Bit Definitions */
+#define PKTCTRL_PHUGEEN		0x08
+#define PKTCTRL_PPADEN		0x04
+#define PKTCTRL_PCRCEN		0x02
+#define PKTCTRL_POVERRIDE	0x01
+
+/* ENC28J60 Transmit Status Vector */
+#define TSV_TXBYTECNT		0
+#define TSV_TXCOLLISIONCNT	16
+#define TSV_TXCRCERROR		20
+#define TSV_TXLENCHKERROR	21
+#define TSV_TXLENOUTOFRANGE	22
+#define TSV_TXDONE		23
+#define TSV_TXMULTICAST		24
+#define TSV_TXBROADCAST		25
+#define TSV_TXPACKETDEFER	26
+#define TSV_TXEXDEFER		27
+#define TSV_TXEXCOLLISION	28
+#define TSV_TXLATECOLLISION	29
+#define TSV_TXGIANT		30
+#define TSV_TXUNDERRUN		31
+#define TSV_TOTBYTETXONWIRE	32
+#define TSV_TXCONTROLFRAME	48
+#define TSV_TXPAUSEFRAME	49
+#define TSV_BACKPRESSUREAPP	50
+#define TSV_TXVLANTAGFRAME	51
+
+#define TSV_SIZE		7
+#define TSV_BYTEOF(x)		((x) / 8)
+#define TSV_BITMASK(x)		(1 << ((x) % 8))
+#define TSV_GETBIT(x, y)	(((x)[TSV_BYTEOF(y)] & TSV_BITMASK(y)) ? 1 : 0)
+
+/* ENC28J60 Receive Status Vector */
+#define RSV_RXLONGEVDROPEV	16
+#define RSV_CARRIEREV		18
+#define RSV_CRCERROR		20
+#define RSV_LENCHECKERR		21
+#define RSV_LENOUTOFRANGE	22
+#define RSV_RXOK		23
+#define RSV_RXMULTICAST		24
+#define RSV_RXBROADCAST		25
+#define RSV_DRIBBLENIBBLE	26
+#define RSV_RXCONTROLFRAME	27
+#define RSV_RXPAUSEFRAME	28
+#define RSV_RXUNKNOWNOPCODE	29
+#define RSV_RXTYPEVLAN		30
+
+#define RSV_SIZE		6
+#define RSV_BITMASK(x)		(1 << ((x) - 16))
+#define RSV_GETBIT(x, y)	(((x) & RSV_BITMASK(y)) ? 1 : 0)
+
+
+/* SPI operation codes */
+#define ENC28J60_READ_CTRL_REG	0x00
+#define ENC28J60_READ_BUF_MEM	0x3A
+#define ENC28J60_WRITE_CTRL_REG 0x40
+#define ENC28J60_WRITE_BUF_MEM	0x7A
+#define ENC28J60_BIT_FIELD_SET	0x80
+#define ENC28J60_BIT_FIELD_CLR	0xA0
+#define ENC28J60_SOFT_RESET	0xFF
+
+
+/* buffer boundaries applied to internal 8K ram
+ * entire available packet buffer space is allocated.
+ * Give TX buffer space for one full ethernet frame (~1500 bytes)
+ * receive buffer gets the rest */
+#define TXSTART_INIT		0x1A00
+#define TXEND_INIT		0x1FFF
+
+/* Put RX buffer at 0 as suggested by the Errata datasheet */
+#define RXSTART_INIT		0x0000
+#define RXEND_INIT		0x19FF
+
+/* maximum ethernet frame length */
+#define MAX_FRAMELEN		1518
+
+/* Preferred half duplex: LEDA: Link status LEDB: Rx/Tx activity */
+#define ENC28J60_LAMPS_MODE	0x3476
+
+#endif