ioc3-eth/meth: Move the SGI drivers

Move the SGI drivers into drivers/net/ethernet/sgi/ and make the
necessary Kconfig and Makefile changes.

CC: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 243 insertions, 0 deletions

diff --git a/drivers/net/ethernet/sgi/meth.h b/drivers/net/ethernet/sgi/meth.h
new file mode 100644
index 000000000000..5b145c6bad60
--- /dev/null
+++ b/drivers/net/ethernet/sgi/meth.h
@@ -0,0 +1,243 @@
+
+/*
+ * snull.h -- definitions for the network module
+ *
+ * Copyright (C) 2001 Alessandro Rubini and Jonathan Corbet
+ * Copyright (C) 2001 O'Reilly & Associates
+ *
+ * The source code in this file can be freely used, adapted,
+ * and redistributed in source or binary form, so long as an
+ * acknowledgment appears in derived source files.  The citation
+ * should list that the code comes from the book "Linux Device
+ * Drivers" by Alessandro Rubini and Jonathan Corbet, published
+ * by O'Reilly & Associates.   No warranty is attached;
+ * we cannot take responsibility for errors or fitness for use.
+ */
+
+/* version dependencies have been confined to a separate file */
+
+/* Tunable parameters */
+#define TX_RING_ENTRIES 64	/* 64-512?*/
+
+#define RX_RING_ENTRIES 16 /* Do not change */
+/* Internal constants */
+#define TX_RING_BUFFER_SIZE	(TX_RING_ENTRIES*sizeof(tx_packet))
+#define RX_BUFFER_SIZE 1546 /* ethenet packet size */
+#define METH_RX_BUFF_SIZE 4096
+#define METH_RX_HEAD 34 /* status + 3 quad garbage-fill + 2 byte zero-pad */
+#define RX_BUFFER_OFFSET (sizeof(rx_status_vector)+2) /* staus vector + 2 bytes of padding */
+#define RX_BUCKET_SIZE 256
+
+/* For more detailed explanations of what each field menas,
+   see Nick's great comments to #defines below (or docs, if
+   you are lucky enough toget hold of them :)*/
+
+/* tx status vector is written over tx command header upon
+   dma completion. */
+
+typedef struct tx_status_vector {
+	u64		sent:1; /* always set to 1...*/
+	u64		pad0:34;/* always set to 0 */
+	u64		flags:9;			/*I'm too lazy to specify each one separately at the moment*/
+	u64		col_retry_cnt:4;	/*collision retry count*/
+	u64		len:16;				/*Transmit length in bytes*/
+} tx_status_vector;
+
+/*
+ * Each packet is 128 bytes long.
+ * It consists of header, 0-3 concatination
+ * buffer pointers and up to 120 data bytes.
+ */
+typedef struct tx_packet_hdr {
+	u64		pad1:36; /*should be filled with 0 */
+	u64		cat_ptr3_valid:1,	/*Concatination pointer valid flags*/
+			cat_ptr2_valid:1,
+			cat_ptr1_valid:1;
+	u64		tx_int_flag:1;		/*Generate TX intrrupt when packet has been sent*/
+	u64		term_dma_flag:1;	/*Terminate transmit DMA on transmit abort conditions*/
+	u64		data_offset:7;		/*Starting byte offset in ring data block*/
+	u64		data_len:16;		/*Length of valid data in bytes-1*/
+} tx_packet_hdr;
+typedef union tx_cat_ptr {
+	struct {
+		u64		pad2:16; /* should be 0 */
+		u64		len:16;				/*length of buffer data - 1*/
+		u64		start_addr:29;		/*Physical starting address*/
+		u64		pad1:3; /* should be zero */
+	} form;
+	u64 raw;
+} tx_cat_ptr;
+
+typedef struct tx_packet {
+	union {
+		tx_packet_hdr header;
+		tx_status_vector res;
+		u64 raw;
+	}header;
+	union {
+		tx_cat_ptr cat_buf[3];
+		char dt[120];
+	} data;
+} tx_packet;
+
+typedef union rx_status_vector {
+	volatile struct {
+		u64		pad1:1;/*fill it with ones*/
+		u64		pad2:15;/*fill with 0*/
+		u64		ip_chk_sum:16;
+		u64		seq_num:5;
+		u64		mac_addr_match:1;
+		u64		mcast_addr_match:1;
+		u64		carrier_event_seen:1;
+		u64		bad_packet:1;
+		u64		long_event_seen:1;
+		u64		invalid_preamble:1;
+		u64		broadcast:1;
+		u64		multicast:1;
+		u64		crc_error:1;
+		u64		huh:1;/*???*/
+		u64		rx_code_violation:1;
+		u64		rx_len:16;
+	} parsed;
+	volatile u64 raw;
+} rx_status_vector;
+
+typedef struct rx_packet {
+	rx_status_vector status;
+        u64 pad[3]; /* For whatever reason, there needs to be 4 double-word offset */
+        u16 pad2;
+	char buf[METH_RX_BUFF_SIZE-sizeof(rx_status_vector)-3*sizeof(u64)-sizeof(u16)];/* data */
+} rx_packet;
+
+#define TX_INFO_RPTR    0x00FF0000
+#define TX_INFO_WPTR    0x000000FF
+
+	/* Bits in METH_MAC */
+
+#define SGI_MAC_RESET		BIT(0)	/* 0: MAC110 active in run mode, 1: Global reset signal to MAC110 core is active */
+#define METH_PHY_FDX		BIT(1) /* 0: Disable full duplex, 1: Enable full duplex */
+#define METH_PHY_LOOP	BIT(2) /* 0: Normal operation, follows 10/100mbit and M10T/MII select, 1: loops internal MII bus */
+				       /*    selects ignored */
+#define METH_100MBIT		BIT(3) /* 0: 10meg mode, 1: 100meg mode */
+#define METH_PHY_MII		BIT(4) /* 0: MII selected, 1: SIA selected */
+				       /*   Note: when loopback is set this bit becomes collision control.  Setting this bit will */
+				       /*         cause a collision to be reported. */
+
+				       /* Bits 5 and 6 are used to determine the Destination address filter mode */
+#define METH_ACCEPT_MY 0			/* 00: Accept PHY address only */
+#define METH_ACCEPT_MCAST 0x20	/* 01: Accept physical, broadcast, and multicast filter matches only */
+#define METH_ACCEPT_AMCAST 0x40	/* 10: Accept physical, broadcast, and all multicast packets */
+#define METH_PROMISC 0x60		/* 11: Promiscious mode */
+
+#define METH_PHY_LINK_FAIL	BIT(7) /* 0: Link failure detection disabled, 1: Hardware scans for link failure in PHY */
+
+#define METH_MAC_IPG	0x1ffff00
+
+#define METH_DEFAULT_IPG ((17<<15) | (11<<22) | (21<<8))
+						/* 0x172e5c00 */ /* 23, 23, 23 */ /*0x54A9500 *//*21,21,21*/
+				       /* Bits 8 through 14 are used to determine Inter-Packet Gap between "Back to Back" packets */
+				       /* The gap depends on the clock speed of the link, 80ns per increment for 100baseT, 800ns  */
+				       /* per increment for 10BaseT */
+
+				       /* Bits 15 through 21 are used to determine IPGR1 */
+
+				       /* Bits 22 through 28 are used to determine IPGR2 */
+
+#define METH_REV_SHIFT 29       /* Bits 29 through 31 are used to determine the revision */
+				       /* 000: Initial revision */
+				       /* 001: First revision, Improved TX concatenation */
+
+
+/* DMA control bits */
+#define METH_RX_OFFSET_SHIFT 12 /* Bits 12:14 of DMA control register indicate starting offset of packet data for RX operation */
+#define METH_RX_DEPTH_SHIFT 4 /* Bits 8:4 define RX fifo depth -- when # of RX fifo entries != depth, interrupt is generted */
+
+#define METH_DMA_TX_EN BIT(1) /* enable TX DMA */
+#define METH_DMA_TX_INT_EN BIT(0) /* enable TX Buffer Empty interrupt */
+#define METH_DMA_RX_EN BIT(15) /* Enable RX */
+#define METH_DMA_RX_INT_EN BIT(9) /* Enable interrupt on RX packet */
+
+/* RX FIFO MCL Info bits */
+#define METH_RX_FIFO_WPTR(x)   (((x)>>16)&0xf)
+#define METH_RX_FIFO_RPTR(x)   (((x)>>8)&0xf)
+#define METH_RX_FIFO_DEPTH(x)  ((x)&0x1f)
+
+/* RX status bits */
+
+#define METH_RX_ST_VALID BIT(63)
+#define METH_RX_ST_RCV_CODE_VIOLATION BIT(16)
+#define METH_RX_ST_DRBL_NBL BIT(17)
+#define METH_RX_ST_CRC_ERR BIT(18)
+#define METH_RX_ST_MCAST_PKT BIT(19)
+#define METH_RX_ST_BCAST_PKT BIT(20)
+#define METH_RX_ST_INV_PREAMBLE_CTX BIT(21)
+#define METH_RX_ST_LONG_EVT_SEEN BIT(22)
+#define METH_RX_ST_BAD_PACKET BIT(23)
+#define METH_RX_ST_CARRIER_EVT_SEEN BIT(24)
+#define METH_RX_ST_MCAST_FILTER_MATCH BIT(25)
+#define METH_RX_ST_PHYS_ADDR_MATCH BIT(26)
+
+#define METH_RX_STATUS_ERRORS \
+	( \
+	METH_RX_ST_RCV_CODE_VIOLATION| \
+	METH_RX_ST_CRC_ERR| \
+	METH_RX_ST_INV_PREAMBLE_CTX| \
+	METH_RX_ST_LONG_EVT_SEEN| \
+	METH_RX_ST_BAD_PACKET| \
+	METH_RX_ST_CARRIER_EVT_SEEN \
+	)
+	/* Bits in METH_INT */
+	/* Write _1_ to corresponding bit to clear */
+#define METH_INT_TX_EMPTY	BIT(0)	/* 0: No interrupt pending, 1: The TX ring buffer is empty */
+#define METH_INT_TX_PKT		BIT(1)	/* 0: No interrupt pending */
+					      	/* 1: A TX message had the INT request bit set, the packet has been sent. */
+#define METH_INT_TX_LINK_FAIL	BIT(2)	/* 0: No interrupt pending, 1: PHY has reported a link failure */
+#define METH_INT_MEM_ERROR	BIT(3)	/* 0: No interrupt pending */
+						/* 1: A memory error occurred during DMA, DMA stopped, Fatal */
+#define METH_INT_TX_ABORT		BIT(4)	/* 0: No interrupt pending, 1: The TX aborted operation, DMA stopped, FATAL */
+#define METH_INT_RX_THRESHOLD	BIT(5)	/* 0: No interrupt pending, 1: Selected receive threshold condition Valid */
+#define METH_INT_RX_UNDERFLOW	BIT(6)	/* 0: No interrupt pending, 1: FIFO was empty, packet could not be queued */
+#define METH_INT_RX_OVERFLOW		BIT(7)	/* 0: No interrupt pending, 1: DMA FIFO Overflow, DMA stopped, FATAL */
+
+/*#define METH_INT_RX_RPTR_MASK 0x0001F00*/		/* Bits 8 through 12 alias of RX read-pointer */
+#define METH_INT_RX_RPTR_MASK 0x0000F00		/* Bits 8 through 11 alias of RX read-pointer - so, is Rx FIFO 16 or 32 entry?*/
+
+						/* Bits 13 through 15 are always 0. */
+
+#define METH_INT_TX_RPTR_MASK	0x1FF0000        /* Bits 16 through 24 alias of TX read-pointer */
+
+#define METH_INT_RX_SEQ_MASK	0x2E000000	/* Bits 25 through 29 are the starting seq number for the message at the */
+
+						/* top of the queue */
+
+#define METH_INT_ERROR	(METH_INT_TX_LINK_FAIL| \
+			METH_INT_MEM_ERROR| \
+			METH_INT_TX_ABORT| \
+			METH_INT_RX_OVERFLOW| \
+			METH_INT_RX_UNDERFLOW)
+
+#define METH_INT_MCAST_HASH		BIT(30) /* If RX DMA is enabled the hash select logic output is latched here */
+
+/* TX status bits */
+#define METH_TX_ST_DONE      BIT(63) /* TX complete */
+#define METH_TX_ST_SUCCESS   BIT(23) /* Packet was transmitted successfully */
+#define METH_TX_ST_TOOLONG   BIT(24) /* TX abort due to excessive length */
+#define METH_TX_ST_UNDERRUN  BIT(25) /* TX abort due to underrun (?) */
+#define METH_TX_ST_EXCCOLL   BIT(26) /* TX abort due to excess collisions */
+#define METH_TX_ST_DEFER     BIT(27) /* TX abort due to excess deferals */
+#define METH_TX_ST_LATECOLL  BIT(28) /* TX abort due to late collision */
+
+
+/* Tx command header bits */
+#define METH_TX_CMD_INT_EN BIT(24) /* Generate TX interrupt when packet is sent */
+
+/* Phy MDIO interface busy flag */
+#define MDIO_BUSY    BIT(16)
+#define MDIO_DATA_MASK 0xFFFF
+/* PHY defines */
+#define PHY_QS6612X    0x0181441    /* Quality TX */
+#define PHY_ICS1889    0x0015F41    /* ICS FX */
+#define PHY_ICS1890    0x0015F42    /* ICS TX */
+#define PHY_DP83840    0x20005C0    /* National TX */
+
+#define ADVANCE_RX_PTR(x)  x=(x+1)&(RX_RING_ENTRIES-1)