net: Adds Fast Ethernet Controller driver for Armada100

This patch adds support for Fast Ethernet Controller driver for
Armada100 series.

Signed-off-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>

1 files changed, 232 insertions, 0 deletions

diff --git a/drivers/net/armada100_fec.h b/drivers/net/armada100_fec.h
new file mode 100644
index 0000000..e2df4fc
--- /dev/null
+++ b/drivers/net/armada100_fec.h
@@ -0,0 +1,232 @@
+/*
+ * (C) Copyright 2011
+ * eInfochips Ltd. <www.einfochips.com>
+ * Written-by: Ajay Bhargav <ajay.bhargav@einfochips.com>
+ *
+ * (C) Copyright 2010
+ * Marvell Semiconductor <www.marvell.com>
+ * Contributor: Mahavir Jain <mjain@marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef __ARMADA100_FEC_H__
+#define __ARMADA100_FEC_H__
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#define PORT_NUM		0x0
+
+/* RX & TX descriptor command */
+#define BUF_OWNED_BY_DMA        (1<<31)
+
+/* RX descriptor status */
+#define RX_EN_INT               (1<<23)
+#define RX_FIRST_DESC           (1<<17)
+#define RX_LAST_DESC            (1<<16)
+#define RX_ERROR                (1<<15)
+
+/* TX descriptor command */
+#define TX_EN_INT               (1<<23)
+#define TX_GEN_CRC              (1<<22)
+#define TX_ZERO_PADDING         (1<<18)
+#define TX_FIRST_DESC           (1<<17)
+#define TX_LAST_DESC            (1<<16)
+#define TX_ERROR                (1<<15)
+
+/* smi register */
+#define SMI_BUSY                (1<<28)	/* 0 - Write, 1 - Read  */
+#define SMI_R_VALID             (1<<27)	/* 0 - Write, 1 - Read  */
+#define SMI_OP_W                (0<<26)	/* Write operation      */
+#define SMI_OP_R                (1<<26)	/* Read operation */
+
+#define HASH_ADD                0
+#define HASH_DELETE             1
+#define HASH_ADDR_TABLE_SIZE    0x4000	/* 16K (1/2K address - PCR_HS == 1) */
+#define HOP_NUMBER              12
+
+#define PHY_WAIT_ITERATIONS     1000	/* 1000 iterations * 10uS = 10mS max */
+#define PHY_WAIT_MICRO_SECONDS  10
+
+#define ETH_HW_IP_ALIGN         2	/* hw aligns IP header */
+#define ETH_EXTRA_HEADER        (6+6+2+4)
+					/* dest+src addr+protocol id+crc */
+#define MAX_PKT_SIZE            1536
+
+
+/* Bit definitions of the SDMA Config Reg */
+#define SDCR_BSZ_OFF            12
+#define SDCR_BSZ8               (3<<SDCR_BSZ_OFF)
+#define SDCR_BSZ4               (2<<SDCR_BSZ_OFF)
+#define SDCR_BSZ2               (1<<SDCR_BSZ_OFF)
+#define SDCR_BSZ1               (0<<SDCR_BSZ_OFF)
+#define SDCR_BLMR               (1<<6)
+#define SDCR_BLMT               (1<<7)
+#define SDCR_RIFB               (1<<9)
+#define SDCR_RC_OFF             2
+#define SDCR_RC_MAX_RETRANS     (0xf << SDCR_RC_OFF)
+
+/* SDMA_CMD */
+#define SDMA_CMD_AT             (1<<31)
+#define SDMA_CMD_TXDL           (1<<24)
+#define SDMA_CMD_TXDH           (1<<23)
+#define SDMA_CMD_AR             (1<<15)
+#define SDMA_CMD_ERD            (1<<7)
+
+
+/* Bit definitions of the Port Config Reg */
+#define PCR_HS                  (1<<12)
+#define PCR_EN                  (1<<7)
+#define PCR_PM                  (1<<0)
+
+/* Bit definitions of the Port Config Extend Reg */
+#define PCXR_2BSM               (1<<28)
+#define PCXR_DSCP_EN            (1<<21)
+#define PCXR_MFL_1518           (0<<14)
+#define PCXR_MFL_1536           (1<<14)
+#define PCXR_MFL_2048           (2<<14)
+#define PCXR_MFL_64K            (3<<14)
+#define PCXR_FLP                (1<<11)
+#define PCXR_PRIO_TX_OFF        3
+#define PCXR_TX_HIGH_PRI        (7<<PCXR_PRIO_TX_OFF)
+
+/*
+ *  * Bit definitions of the Interrupt Cause Reg
+ *   * and Interrupt MASK Reg is the same
+ *    */
+#define ICR_RXBUF               (1<<0)
+#define ICR_TXBUF_H             (1<<2)
+#define ICR_TXBUF_L             (1<<3)
+#define ICR_TXEND_H             (1<<6)
+#define ICR_TXEND_L             (1<<7)
+#define ICR_RXERR               (1<<8)
+#define ICR_TXERR_H             (1<<10)
+#define ICR_TXERR_L             (1<<11)
+#define ICR_TX_UDR              (1<<13)
+#define ICR_MII_CH              (1<<28)
+
+#define ALL_INTS (ICR_TXBUF_H  | ICR_TXBUF_L  | ICR_TX_UDR |\
+				ICR_TXERR_H  | ICR_TXERR_L |\
+				ICR_TXEND_H  | ICR_TXEND_L |\
+				ICR_RXBUF | ICR_RXERR  | ICR_MII_CH)
+
+#define PHY_MASK               0x0000001f
+
+#define to_darmdfec(_kd) container_of(_kd, struct armdfec_device, dev)
+/* Size of a Tx/Rx descriptor used in chain list data structure */
+#define ARMDFEC_RXQ_DESC_ALIGNED_SIZE \
+	(((sizeof(struct rx_desc) / PKTALIGN) + 1) * PKTALIGN)
+
+#define RX_BUF_OFFSET		0x2
+#define RXQ			0x0	/* RX Queue 0 */
+#define TXQ			0x1	/* TX Queue 1 */
+
+struct addr_table_entry_t {
+	u32 lo;
+	u32 hi;
+};
+
+/* Bit fields of a Hash Table Entry */
+enum hash_table_entry {
+	HTEVALID = 1,
+	HTESKIP = 2,
+	HTERD = 4,
+	HTERDBIT = 2
+};
+
+struct tx_desc {
+	u32 cmd_sts;		/* Command/status field */
+	u16 reserved;
+	u16 byte_cnt;		/* buffer byte count */
+	u8 *buf_ptr;		/* pointer to buffer for this descriptor */
+	struct tx_desc *nextdesc_p;	/* Pointer to next descriptor */
+};
+
+struct rx_desc {
+	u32 cmd_sts;		/* Descriptor command status */
+	u16 byte_cnt;		/* Descriptor buffer byte count */
+	u16 buf_size;		/* Buffer size */
+	u8 *buf_ptr;		/* Descriptor buffer pointer */
+	struct rx_desc *nxtdesc_p;	/* Next descriptor pointer */
+};
+
+/*
+ * Armada100 Fast Ethernet controller Registers
+ * Refer Datasheet Appendix A.22
+ */
+struct armdfec_reg {
+	u32 phyadr;			/* PHY Address */
+	u32 pad1[3];
+	u32 smi;			/* SMI */
+	u32 pad2[0xFB];
+	u32 pconf;			/* Port configuration */
+	u32 pad3;
+	u32 pconf_ext;			/* Port configuration extend */
+	u32 pad4;
+	u32 pcmd;			/* Port Command */
+	u32 pad5;
+	u32 pstatus;			/* Port Status */
+	u32 pad6;
+	u32 spar;			/* Serial Parameters */
+	u32 pad7;
+	u32 htpr;			/* Hash table pointer */
+	u32 pad8;
+	u32 fcsal;			/* Flow control source address low */
+	u32 pad9;
+	u32 fcsah;			/* Flow control source address high */
+	u32 pad10;
+	u32 sdma_conf;			/* SDMA configuration */
+	u32 pad11;
+	u32 sdma_cmd;			/* SDMA command */
+	u32 pad12;
+	u32 ic;				/* Interrupt cause */
+	u32 iwc;			/* Interrupt write to clear */
+	u32 im;				/* Interrupt mask */
+	u32 pad13;
+	u32 *eth_idscpp[4];		/* Eth0 IP Differentiated Services Code
+					   Point to Priority 0 Low */
+	u32 eth_vlan_p;			/* Eth0 VLAN Priority Tag to Priority */
+	u32 pad14[3];
+	struct rx_desc *rxfdp[4];	/* Ethernet First Rx Descriptor
+					   Pointer */
+	u32 pad15[4];
+	struct rx_desc *rxcdp[4];	/* Ethernet Current Rx Descriptor
+					   Pointer */
+	u32 pad16[0x0C];
+	struct tx_desc *txcdp[2];	/* Ethernet Current Tx Descriptor
+					   Pointer */
+};
+
+struct armdfec_device {
+	struct eth_device dev;
+	struct armdfec_reg *regs;
+	struct tx_desc *p_txdesc;
+	struct rx_desc *p_rxdesc;
+	struct rx_desc *p_rxdesc_curr;
+	u8 *p_rxbuf;
+	u8 *p_aligned_txbuf;
+	u8 *htpr;		/* hash pointer */
+};
+
+#endif /* __ARMADA100_FEC_H__ */