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drivers/net/ethernet/xilinx: added Xilinx AXI Ethernet driver

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This driver adds support for Xilinx 10/100/1000 AXI Ethernet.

It can be used, for instance, on Xilinx boards with a Microblaze
architecture like the ML605.

The patch is against the latest net-next tree and checkpatch clean.

Signed-off-by: Ariane Keller <ariane.keller@tik.ee.ethz.ch>
Signed-off-by: Daniel Borkmann <daniel.borkmann@tik.ee.ethz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
danborkmann@iogearbox.net 2012-01-19 00:39:31 +00:00 committed by David S. Miller
parent a44acd5514
commit 8a3b7a252d
6 changed files with 2444 additions and 0 deletions
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6
MAINTAINERS
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@ -7469,6 +7469,12 @@ S: Supported
F: Documentation/filesystems/xfs.txt
F: fs/xfs/
XILINX AXI ETHERNET DRIVER
M: Ariane Keller <ariane.keller@tik.ee.ethz.ch>
M: Daniel Borkmann <daniel.borkmann@tik.ee.ethz.ch>
S: Maintained
F: drivers/net/ethernet/xilinx/xilinx_axienet*
XILINX SYSTEMACE DRIVER
M: Grant Likely <grant.likely@secretlab.ca>
W: http://www.secretlab.ca/

8
drivers/net/ethernet/xilinx/Kconfig
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@ -25,6 +25,14 @@ config XILINX_EMACLITE
---help---
This driver supports the 10/100 Ethernet Lite from Xilinx.
config XILINX_AXI_EMAC
tristate "Xilinx 10/100/1000 AXI Ethernet support"
depends on (PPC32 || MICROBLAZE)
select PHYLIB
---help---
This driver supports the 10/100/1000 Ethernet from Xilinx for the
AXI bus interface used in Xilinx Virtex FPGAs.
config XILINX_LL_TEMAC
tristate "Xilinx LL TEMAC (LocalLink Tri-mode Ethernet MAC) driver"
depends on (PPC || MICROBLAZE)

2
drivers/net/ethernet/xilinx/Makefile
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@ -5,3 +5,5 @@
ll_temac-objs := ll_temac_main.o ll_temac_mdio.o
obj-$(CONFIG_XILINX_LL_TEMAC) += ll_temac.o
obj-$(CONFIG_XILINX_EMACLITE) += xilinx_emaclite.o
xilinx_emac-objs := xilinx_axienet_main.o xilinx_axienet_mdio.o
obj-$(CONFIG_XILINX_AXI_EMAC) += xilinx_emac.o

508
drivers/net/ethernet/xilinx/xilinx_axienet.h Normal file
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@ -0,0 +1,508 @@
/*
* Definitions for Xilinx Axi Ethernet device driver.
*
* Copyright (c) 2009 Secret Lab Technologies, Ltd.
* Copyright (c) 2010 Xilinx, Inc. All rights reserved.
* Copyright (c) 2012 Daniel Borkmann, <daniel.borkmann@tik.ee.ethz.ch>
* Copyright (c) 2012 Ariane Keller, <ariane.keller@tik.ee.ethz.ch>
*/
#ifndef XILINX_AXIENET_H
#define XILINX_AXIENET_H
#include <linux/netdevice.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
/* Packet size info */
#define XAE_HDR_SIZE 14 /* Size of Ethernet header */
#define XAE_HDR_VLAN_SIZE 18 /* Size of an Ethernet hdr + VLAN */
#define XAE_TRL_SIZE 4 /* Size of Ethernet trailer (FCS) */
#define XAE_MTU 1500 /* Max MTU of an Ethernet frame */
#define XAE_JUMBO_MTU 9000 /* Max MTU of a jumbo Eth. frame */
#define XAE_MAX_FRAME_SIZE (XAE_MTU + XAE_HDR_SIZE + XAE_TRL_SIZE)
#define XAE_MAX_VLAN_FRAME_SIZE (XAE_MTU + XAE_HDR_VLAN_SIZE + XAE_TRL_SIZE)
#define XAE_MAX_JUMBO_FRAME_SIZE (XAE_JUMBO_MTU + XAE_HDR_SIZE + XAE_TRL_SIZE)
/* Configuration options */
/* Accept all incoming packets. Default: disabled (cleared) */
#define XAE_OPTION_PROMISC (1 << 0)
/* Jumbo frame support for Tx & Rx. Default: disabled (cleared) */
#define XAE_OPTION_JUMBO (1 << 1)
/* VLAN Rx & Tx frame support. Default: disabled (cleared) */
#define XAE_OPTION_VLAN (1 << 2)
/* Enable recognition of flow control frames on Rx. Default: enabled (set) */
#define XAE_OPTION_FLOW_CONTROL (1 << 4)
/* Strip FCS and PAD from incoming frames. Note: PAD from VLAN frames is not
* stripped. Default: disabled (set) */
#define XAE_OPTION_FCS_STRIP (1 << 5)
/* Generate FCS field and add PAD automatically for outgoing frames.
* Default: enabled (set) */
#define XAE_OPTION_FCS_INSERT (1 << 6)
/* Enable Length/Type error checking for incoming frames. When this option is
* set, the MAC will filter frames that have a mismatched type/length field
* and if XAE_OPTION_REPORT_RXERR is set, the user is notified when these
* types of frames are encountered. When this option is cleared, the MAC will
* allow these types of frames to be received. Default: enabled (set) */
#define XAE_OPTION_LENTYPE_ERR (1 << 7)
/* Enable the transmitter. Default: enabled (set) */
#define XAE_OPTION_TXEN (1 << 11)
/* Enable the receiver. Default: enabled (set) */
#define XAE_OPTION_RXEN (1 << 12)
/* Default options set when device is initialized or reset */
#define XAE_OPTION_DEFAULTS \
(XAE_OPTION_TXEN | \
XAE_OPTION_FLOW_CONTROL | \
XAE_OPTION_RXEN)
/* Axi DMA Register definitions */
#define XAXIDMA_TX_CR_OFFSET 0x00000000 /* Channel control */
#define XAXIDMA_TX_SR_OFFSET 0x00000004 /* Status */
#define XAXIDMA_TX_CDESC_OFFSET 0x00000008 /* Current descriptor pointer */
#define XAXIDMA_TX_TDESC_OFFSET 0x00000010 /* Tail descriptor pointer */
#define XAXIDMA_RX_CR_OFFSET 0x00000030 /* Channel control */
#define XAXIDMA_RX_SR_OFFSET 0x00000034 /* Status */
#define XAXIDMA_RX_CDESC_OFFSET 0x00000038 /* Current descriptor pointer */
#define XAXIDMA_RX_TDESC_OFFSET 0x00000040 /* Tail descriptor pointer */
#define XAXIDMA_CR_RUNSTOP_MASK 0x00000001 /* Start/stop DMA channel */
#define XAXIDMA_CR_RESET_MASK 0x00000004 /* Reset DMA engine */
#define XAXIDMA_BD_NDESC_OFFSET 0x00 /* Next descriptor pointer */
#define XAXIDMA_BD_BUFA_OFFSET 0x08 /* Buffer address */
#define XAXIDMA_BD_CTRL_LEN_OFFSET 0x18 /* Control/buffer length */
#define XAXIDMA_BD_STS_OFFSET 0x1C /* Status */
#define XAXIDMA_BD_USR0_OFFSET 0x20 /* User IP specific word0 */
#define XAXIDMA_BD_USR1_OFFSET 0x24 /* User IP specific word1 */
#define XAXIDMA_BD_USR2_OFFSET 0x28 /* User IP specific word2 */
#define XAXIDMA_BD_USR3_OFFSET 0x2C /* User IP specific word3 */
#define XAXIDMA_BD_USR4_OFFSET 0x30 /* User IP specific word4 */
#define XAXIDMA_BD_ID_OFFSET 0x34 /* Sw ID */
#define XAXIDMA_BD_HAS_STSCNTRL_OFFSET 0x38 /* Whether has stscntrl strm */
#define XAXIDMA_BD_HAS_DRE_OFFSET 0x3C /* Whether has DRE */
#define XAXIDMA_BD_HAS_DRE_SHIFT 8 /* Whether has DRE shift */
#define XAXIDMA_BD_HAS_DRE_MASK 0xF00 /* Whether has DRE mask */
#define XAXIDMA_BD_WORDLEN_MASK 0xFF /* Whether has DRE mask */
#define XAXIDMA_BD_CTRL_LENGTH_MASK 0x007FFFFF /* Requested len */
#define XAXIDMA_BD_CTRL_TXSOF_MASK 0x08000000 /* First tx packet */
#define XAXIDMA_BD_CTRL_TXEOF_MASK 0x04000000 /* Last tx packet */
#define XAXIDMA_BD_CTRL_ALL_MASK 0x0C000000 /* All control bits */
#define XAXIDMA_DELAY_MASK 0xFF000000 /* Delay timeout counter */
#define XAXIDMA_COALESCE_MASK 0x00FF0000 /* Coalesce counter */
#define XAXIDMA_DELAY_SHIFT 24
#define XAXIDMA_COALESCE_SHIFT 16
#define XAXIDMA_IRQ_IOC_MASK 0x00001000 /* Completion intr */
#define XAXIDMA_IRQ_DELAY_MASK 0x00002000 /* Delay interrupt */
#define XAXIDMA_IRQ_ERROR_MASK 0x00004000 /* Error interrupt */
#define XAXIDMA_IRQ_ALL_MASK 0x00007000 /* All interrupts */
/* Default TX/RX Threshold and waitbound values for SGDMA mode */
#define XAXIDMA_DFT_TX_THRESHOLD 24
#define XAXIDMA_DFT_TX_WAITBOUND 254
#define XAXIDMA_DFT_RX_THRESHOLD 24
#define XAXIDMA_DFT_RX_WAITBOUND 254
#define XAXIDMA_BD_CTRL_TXSOF_MASK 0x08000000 /* First tx packet */
#define XAXIDMA_BD_CTRL_TXEOF_MASK 0x04000000 /* Last tx packet */
#define XAXIDMA_BD_CTRL_ALL_MASK 0x0C000000 /* All control bits */
#define XAXIDMA_BD_STS_ACTUAL_LEN_MASK 0x007FFFFF /* Actual len */
#define XAXIDMA_BD_STS_COMPLETE_MASK 0x80000000 /* Completed */
#define XAXIDMA_BD_STS_DEC_ERR_MASK 0x40000000 /* Decode error */
#define XAXIDMA_BD_STS_SLV_ERR_MASK 0x20000000 /* Slave error */
#define XAXIDMA_BD_STS_INT_ERR_MASK 0x10000000 /* Internal err */
#define XAXIDMA_BD_STS_ALL_ERR_MASK 0x70000000 /* All errors */
#define XAXIDMA_BD_STS_RXSOF_MASK 0x08000000 /* First rx pkt */
#define XAXIDMA_BD_STS_RXEOF_MASK 0x04000000 /* Last rx pkt */
#define XAXIDMA_BD_STS_ALL_MASK 0xFC000000 /* All status bits */
#define XAXIDMA_BD_MINIMUM_ALIGNMENT 0x40
/* Axi Ethernet registers definition */
#define XAE_RAF_OFFSET 0x00000000 /* Reset and Address filter */
#define XAE_TPF_OFFSET 0x00000004 /* Tx Pause Frame */
#define XAE_IFGP_OFFSET 0x00000008 /* Tx Inter-frame gap adjustment*/
#define XAE_IS_OFFSET 0x0000000C /* Interrupt status */
#define XAE_IP_OFFSET 0x00000010 /* Interrupt pending */
#define XAE_IE_OFFSET 0x00000014 /* Interrupt enable */
#define XAE_TTAG_OFFSET 0x00000018 /* Tx VLAN TAG */
#define XAE_RTAG_OFFSET 0x0000001C /* Rx VLAN TAG */
#define XAE_UAWL_OFFSET 0x00000020 /* Unicast address word lower */
#define XAE_UAWU_OFFSET 0x00000024 /* Unicast address word upper */
#define XAE_TPID0_OFFSET 0x00000028 /* VLAN TPID0 register */
#define XAE_TPID1_OFFSET 0x0000002C /* VLAN TPID1 register */
#define XAE_PPST_OFFSET 0x00000030 /* PCS PMA Soft Temac Status Reg */
#define XAE_RCW0_OFFSET 0x00000400 /* Rx Configuration Word 0 */
#define XAE_RCW1_OFFSET 0x00000404 /* Rx Configuration Word 1 */
#define XAE_TC_OFFSET 0x00000408 /* Tx Configuration */
#define XAE_FCC_OFFSET 0x0000040C /* Flow Control Configuration */
#define XAE_EMMC_OFFSET 0x00000410 /* EMAC mode configuration */
#define XAE_PHYC_OFFSET 0x00000414 /* RGMII/SGMII configuration */
#define XAE_MDIO_MC_OFFSET 0x00000500 /* MII Management Config */
#define XAE_MDIO_MCR_OFFSET 0x00000504 /* MII Management Control */
#define XAE_MDIO_MWD_OFFSET 0x00000508 /* MII Management Write Data */
#define XAE_MDIO_MRD_OFFSET 0x0000050C /* MII Management Read Data */
#define XAE_MDIO_MIS_OFFSET 0x00000600 /* MII Management Interrupt Status */
#define XAE_MDIO_MIP_OFFSET 0x00000620 /* MII Mgmt Interrupt Pending
* register offset */
#define XAE_MDIO_MIE_OFFSET 0x00000640 /* MII Management Interrupt Enable
* register offset */
#define XAE_MDIO_MIC_OFFSET 0x00000660 /* MII Management Interrupt Clear
* register offset. */
#define XAE_UAW0_OFFSET 0x00000700 /* Unicast address word 0 */
#define XAE_UAW1_OFFSET 0x00000704 /* Unicast address word 1 */
#define XAE_FMI_OFFSET 0x00000708 /* Filter Mask Index */
#define XAE_AF0_OFFSET 0x00000710 /* Address Filter 0 */
#define XAE_AF1_OFFSET 0x00000714 /* Address Filter 1 */
#define XAE_TX_VLAN_DATA_OFFSET 0x00004000 /* TX VLAN data table address */
#define XAE_RX_VLAN_DATA_OFFSET 0x00008000 /* RX VLAN data table address */
#define XAE_MCAST_TABLE_OFFSET 0x00020000 /* Multicast table address */
/* Bit Masks for Axi Ethernet RAF register */
#define XAE_RAF_MCSTREJ_MASK 0x00000002 /* Reject receive multicast
* destination address */
#define XAE_RAF_BCSTREJ_MASK 0x00000004 /* Reject receive broadcast
* destination address */
#define XAE_RAF_TXVTAGMODE_MASK 0x00000018 /* Tx VLAN TAG mode */
#define XAE_RAF_RXVTAGMODE_MASK 0x00000060 /* Rx VLAN TAG mode */
#define XAE_RAF_TXVSTRPMODE_MASK 0x00000180 /* Tx VLAN STRIP mode */
#define XAE_RAF_RXVSTRPMODE_MASK 0x00000600 /* Rx VLAN STRIP mode */
#define XAE_RAF_NEWFNCENBL_MASK 0x00000800 /* New function mode */
#define XAE_RAF_EMULTIFLTRENBL_MASK 0x00001000 /* Exteneded Multicast
* Filtering mode
*/
#define XAE_RAF_STATSRST_MASK 0x00002000 /* Stats. Counter Reset */
#define XAE_RAF_RXBADFRMEN_MASK 0x00004000 /* Recv Bad Frame Enable */
#define XAE_RAF_TXVTAGMODE_SHIFT 3 /* Tx Tag mode shift bits */
#define XAE_RAF_RXVTAGMODE_SHIFT 5 /* Rx Tag mode shift bits */
#define XAE_RAF_TXVSTRPMODE_SHIFT 7 /* Tx strip mode shift bits*/
#define XAE_RAF_RXVSTRPMODE_SHIFT 9 /* Rx Strip mode shift bits*/
/* Bit Masks for Axi Ethernet TPF and IFGP registers */
#define XAE_TPF_TPFV_MASK 0x0000FFFF /* Tx pause frame value */
#define XAE_IFGP0_IFGP_MASK 0x0000007F /* Transmit inter-frame
* gap adjustment value */
/* Bit Masks for Axi Ethernet IS, IE and IP registers, Same masks apply
* for all 3 registers. */
#define XAE_INT_HARDACSCMPLT_MASK 0x00000001 /* Hard register access
* complete */
#define XAE_INT_AUTONEG_MASK 0x00000002 /* Auto negotiation
* complete */
#define XAE_INT_RXCMPIT_MASK 0x00000004 /* Rx complete */
#define XAE_INT_RXRJECT_MASK 0x00000008 /* Rx frame rejected */
#define XAE_INT_RXFIFOOVR_MASK 0x00000010 /* Rx fifo overrun */
#define XAE_INT_TXCMPIT_MASK 0x00000020 /* Tx complete */
#define XAE_INT_RXDCMLOCK_MASK 0x00000040 /* Rx Dcm Lock */
#define XAE_INT_MGTRDY_MASK 0x00000080 /* MGT clock Lock */
#define XAE_INT_PHYRSTCMPLT_MASK 0x00000100 /* Phy Reset complete */
#define XAE_INT_ALL_MASK 0x0000003F /* All the ints */
#define XAE_INT_RECV_ERROR_MASK \
(XAE_INT_RXRJECT_MASK | XAE_INT_RXFIFOOVR_MASK) /* INT bits that
* indicate receive
* errors */
/* Bit masks for Axi Ethernet VLAN TPID Word 0 register */
#define XAE_TPID_0_MASK 0x0000FFFF /* TPID 0 */
#define XAE_TPID_1_MASK 0xFFFF0000 /* TPID 1 */
/* Bit masks for Axi Ethernet VLAN TPID Word 1 register */
#define XAE_TPID_2_MASK 0x0000FFFF /* TPID 0 */
#define XAE_TPID_3_MASK 0xFFFF0000 /* TPID 1 */
/* Bit masks for Axi Ethernet RCW1 register */
#define XAE_RCW1_RST_MASK 0x80000000 /* Reset */
#define XAE_RCW1_JUM_MASK 0x40000000 /* Jumbo frame enable */
#define XAE_RCW1_FCS_MASK 0x20000000 /* In-Band FCS enable
* (FCS not stripped) */
#define XAE_RCW1_RX_MASK 0x10000000 /* Receiver enable */
#define XAE_RCW1_VLAN_MASK 0x08000000 /* VLAN frame enable */
#define XAE_RCW1_LT_DIS_MASK 0x02000000 /* Length/type field valid check
* disable */
#define XAE_RCW1_CL_DIS_MASK 0x01000000 /* Control frame Length check
* disable */
#define XAE_RCW1_PAUSEADDR_MASK 0x0000FFFF /* Pause frame source address
* bits [47:32]. Bits [31:0] are
* stored in register RCW0 */
/* Bit masks for Axi Ethernet TC register */
#define XAE_TC_RST_MASK 0x80000000 /* Reset */
#define XAE_TC_JUM_MASK 0x40000000 /* Jumbo frame enable */
#define XAE_TC_FCS_MASK 0x20000000 /* In-Band FCS enable
* (FCS not generated) */
#define XAE_TC_TX_MASK 0x10000000 /* Transmitter enable */
#define XAE_TC_VLAN_MASK 0x08000000 /* VLAN frame enable */
#define XAE_TC_IFG_MASK 0x02000000 /* Inter-frame gap adjustment
* enable */
/* Bit masks for Axi Ethernet FCC register */
#define XAE_FCC_FCRX_MASK 0x20000000 /* Rx flow control enable */
#define XAE_FCC_FCTX_MASK 0x40000000 /* Tx flow control enable */
/* Bit masks for Axi Ethernet EMMC register */
#define XAE_EMMC_LINKSPEED_MASK 0xC0000000 /* Link speed */
#define XAE_EMMC_RGMII_MASK 0x20000000 /* RGMII mode enable */
#define XAE_EMMC_SGMII_MASK 0x10000000 /* SGMII mode enable */
#define XAE_EMMC_GPCS_MASK 0x08000000 /* 1000BaseX mode enable */
#define XAE_EMMC_HOST_MASK 0x04000000 /* Host interface enable */
#define XAE_EMMC_TX16BIT 0x02000000 /* 16 bit Tx client enable */
#define XAE_EMMC_RX16BIT 0x01000000 /* 16 bit Rx client enable */
#define XAE_EMMC_LINKSPD_10 0x00000000 /* Link Speed mask for 10 Mbit */
#define XAE_EMMC_LINKSPD_100 0x40000000 /* Link Speed mask for 100 Mbit */
#define XAE_EMMC_LINKSPD_1000 0x80000000 /* Link Speed mask for 1000 Mbit */
/* Bit masks for Axi Ethernet PHYC register */
#define XAE_PHYC_SGMIILINKSPEED_MASK 0xC0000000 /* SGMII link speed mask*/
#define XAE_PHYC_RGMIILINKSPEED_MASK 0x0000000C /* RGMII link speed */
#define XAE_PHYC_RGMIIHD_MASK 0x00000002 /* RGMII Half-duplex */
#define XAE_PHYC_RGMIILINK_MASK 0x00000001 /* RGMII link status */
#define XAE_PHYC_RGLINKSPD_10 0x00000000 /* RGMII link 10 Mbit */
#define XAE_PHYC_RGLINKSPD_100 0x00000004 /* RGMII link 100 Mbit */
#define XAE_PHYC_RGLINKSPD_1000 0x00000008 /* RGMII link 1000 Mbit */
#define XAE_PHYC_SGLINKSPD_10 0x00000000 /* SGMII link 10 Mbit */
#define XAE_PHYC_SGLINKSPD_100 0x40000000 /* SGMII link 100 Mbit */
#define XAE_PHYC_SGLINKSPD_1000 0x80000000 /* SGMII link 1000 Mbit */
/* Bit masks for Axi Ethernet MDIO interface MC register */
#define XAE_MDIO_MC_MDIOEN_MASK 0x00000040 /* MII management enable */
#define XAE_MDIO_MC_CLOCK_DIVIDE_MAX 0x3F /* Maximum MDIO divisor */
/* Bit masks for Axi Ethernet MDIO interface MCR register */
#define XAE_MDIO_MCR_PHYAD_MASK 0x1F000000 /* Phy Address Mask */
#define XAE_MDIO_MCR_PHYAD_SHIFT 24 /* Phy Address Shift */
#define XAE_MDIO_MCR_REGAD_MASK 0x001F0000 /* Reg Address Mask */
#define XAE_MDIO_MCR_REGAD_SHIFT 16 /* Reg Address Shift */
#define XAE_MDIO_MCR_OP_MASK 0x0000C000 /* Operation Code Mask */
#define XAE_MDIO_MCR_OP_SHIFT 13 /* Operation Code Shift */
#define XAE_MDIO_MCR_OP_READ_MASK 0x00008000 /* Op Code Read Mask */
#define XAE_MDIO_MCR_OP_WRITE_MASK 0x00004000 /* Op Code Write Mask */
#define XAE_MDIO_MCR_INITIATE_MASK 0x00000800 /* Ready Mask */
#define XAE_MDIO_MCR_READY_MASK 0x00000080 /* Ready Mask */
/* Bit masks for Axi Ethernet MDIO interface MIS, MIP, MIE, MIC registers */
#define XAE_MDIO_INT_MIIM_RDY_MASK 0x00000001 /* MIIM Interrupt */
/* Bit masks for Axi Ethernet UAW1 register */
#define XAE_UAW1_UNICASTADDR_MASK 0x0000FFFF /* Station address bits
* [47:32]; Station address
* bits [31:0] are stored in
* register UAW0 */
/* Bit masks for Axi Ethernet FMI register */
#define XAE_FMI_PM_MASK 0x80000000 /* Promis. mode enable */
#define XAE_FMI_IND_MASK 0x00000003 /* Index Mask */
#define XAE_MDIO_DIV_DFT 29 /* Default MDIO clock divisor */
/* Defines for different options for C_PHY_TYPE parameter in Axi Ethernet IP */
#define XAE_PHY_TYPE_MII 0
#define XAE_PHY_TYPE_GMII 1
#define XAE_PHY_TYPE_RGMII_1_3 2
#define XAE_PHY_TYPE_RGMII_2_0 3
#define XAE_PHY_TYPE_SGMII 4
#define XAE_PHY_TYPE_1000BASE_X 5
#define XAE_MULTICAST_CAM_TABLE_NUM 4 /* Total number of entries in the
* hardware multicast table. */
/* Axi Ethernet Synthesis features */
#define XAE_FEATURE_PARTIAL_RX_CSUM (1 << 0)
#define XAE_FEATURE_PARTIAL_TX_CSUM (1 << 1)
#define XAE_FEATURE_FULL_RX_CSUM (1 << 2)
#define XAE_FEATURE_FULL_TX_CSUM (1 << 3)
#define XAE_NO_CSUM_OFFLOAD 0
#define XAE_FULL_CSUM_STATUS_MASK 0x00000038
#define XAE_IP_UDP_CSUM_VALIDATED 0x00000003
#define XAE_IP_TCP_CSUM_VALIDATED 0x00000002
#define DELAY_OF_ONE_MILLISEC 1000
/**
* struct axidma_bd - Axi Dma buffer descriptor layout
* @next: MM2S/S2MM Next Descriptor Pointer
* @reserved1: Reserved and not used
* @phys: MM2S/S2MM Buffer Address
* @reserved2: Reserved and not used
* @reserved3: Reserved and not used
* @reserved4: Reserved and not used
* @cntrl: MM2S/S2MM Control value
* @status: MM2S/S2MM Status value
* @app0: MM2S/S2MM User Application Field 0.
* @app1: MM2S/S2MM User Application Field 1.
* @app2: MM2S/S2MM User Application Field 2.
* @app3: MM2S/S2MM User Application Field 3.
* @app4: MM2S/S2MM User Application Field 4.
* @sw_id_offset: MM2S/S2MM Sw ID
* @reserved5: Reserved and not used
* @reserved6: Reserved and not used
*/
struct axidma_bd {
u32 next; /* Physical address of next buffer descriptor */
u32 reserved1;
u32 phys;
u32 reserved2;
u32 reserved3;
u32 reserved4;
u32 cntrl;
u32 status;
u32 app0;
u32 app1; /* TX start << 16 | insert */
u32 app2; /* TX csum seed */
u32 app3;
u32 app4;
u32 sw_id_offset;
u32 reserved5;
u32 reserved6;
};
/**
* struct axienet_local - axienet private per device data
* @ndev: Pointer for net_device to which it will be attached.
* @dev: Pointer to device structure
* @phy_dev: Pointer to PHY device structure attached to the axienet_local
* @phy_node: Pointer to device node structure
* @mii_bus: Pointer to MII bus structure
* @mdio_irqs: IRQs table for MDIO bus required in mii_bus structure
* @regs: Base address for the axienet_local device address space
* @dma_regs: Base address for the axidma device address space
* @dma_err_tasklet: Tasklet structure to process Axi DMA errors
* @tx_irq: Axidma TX IRQ number
* @rx_irq: Axidma RX IRQ number
* @temac_type: axienet type to identify between soft and hard temac
* @phy_type: Phy type to identify between MII/GMII/RGMII/SGMII/1000 Base-X
* @options: AxiEthernet option word
* @last_link: Phy link state in which the PHY was negotiated earlier
* @features: Stores the extended features supported by the axienet hw
* @tx_bd_v: Virtual address of the TX buffer descriptor ring
* @tx_bd_p: Physical address(start address) of the TX buffer descr. ring
* @rx_bd_v: Virtual address of the RX buffer descriptor ring
* @rx_bd_p: Physical address(start address) of the RX buffer descr. ring
* @tx_bd_ci: Stores the index of the Tx buffer descriptor in the ring being
* accessed currently. Used while alloc. BDs before a TX starts
* @tx_bd_tail: Stores the index of the Tx buffer descriptor in the ring being
* accessed currently. Used while processing BDs after the TX
* completed.
* @rx_bd_ci: Stores the index of the Rx buffer descriptor in the ring being
* accessed currently.
* @max_frm_size: Stores the maximum size of the frame that can be that
* Txed/Rxed in the existing hardware. If jumbo option is
* supported, the maximum frame size would be 9k. Else it is
* 1522 bytes (assuming support for basic VLAN)
* @jumbo_support: Stores hardware configuration for jumbo support. If hardware
* can handle jumbo packets, this entry will be 1, else 0.
*/
struct axienet_local {
struct net_device *ndev;
struct device *dev;
/* Connection to PHY device */
struct phy_device *phy_dev; /* Pointer to PHY device */
struct device_node *phy_node;
/* MDIO bus data */
struct mii_bus *mii_bus; /* MII bus reference */
int mdio_irqs[PHY_MAX_ADDR]; /* IRQs table for MDIO bus */
/* IO registers, dma functions and IRQs */
void __iomem *regs;
void __iomem *dma_regs;
struct tasklet_struct dma_err_tasklet;
int tx_irq;
int rx_irq;
u32 temac_type;
u32 phy_type;
u32 options; /* Current options word */
u32 last_link;
u32 features;
/* Buffer descriptors */
struct axidma_bd *tx_bd_v;
dma_addr_t tx_bd_p;
struct axidma_bd *rx_bd_v;
dma_addr_t rx_bd_p;
u32 tx_bd_ci;
u32 tx_bd_tail;
u32 rx_bd_ci;
u32 max_frm_size;
u32 jumbo_support;
int csum_offload_on_tx_path;
int csum_offload_on_rx_path;
u32 coalesce_count_rx;
u32 coalesce_count_tx;
};
/**
* struct axiethernet_option - Used to set axi ethernet hardware options
* @opt: Option to be set.
* @reg: Register offset to be written for setting the option
* @m_or: Mask to be ORed for setting the option in the register
*/
struct axienet_option {
u32 opt;
u32 reg;
u32 m_or;
};
/**
* axienet_ior - Memory mapped Axi Ethernet register read
* @lp: Pointer to axienet local structure
* @offset: Address offset from the base address of Axi Ethernet core
*
* returns: The contents of the Axi Ethernet register
*
* This function returns the contents of the corresponding register.
*/
static inline u32 axienet_ior(struct axienet_local *lp, off_t offset)
{
return in_be32(lp->regs + offset);
}
/**
* axienet_iow - Memory mapped Axi Ethernet register write
* @lp: Pointer to axienet local structure
* @offset: Address offset from the base address of Axi Ethernet core
* @value: Value to be written into the Axi Ethernet register
*
* This function writes the desired value into the corresponding Axi Ethernet
* register.
*/
static inline void axienet_iow(struct axienet_local *lp, off_t offset,
u32 value)
{
out_be32((lp->regs + offset), value);
}
/* Function prototypes visible in xilinx_axienet_mdio.c for other files */
int axienet_mdio_setup(struct axienet_local *lp, struct device_node *np);
int axienet_mdio_wait_until_ready(struct axienet_local *lp);
void axienet_mdio_teardown(struct axienet_local *lp);
#endif /* XILINX_AXI_ENET_H */

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drivers/net/ethernet/xilinx/xilinx_axienet_main.c Normal file
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drivers/net/ethernet/xilinx/xilinx_axienet_mdio.c Normal file
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/*
* MDIO bus driver for the Xilinx Axi Ethernet device
*
* Copyright (c) 2009 Secret Lab Technologies, Ltd.
* Copyright (c) 2010 Xilinx, Inc. All rights reserved.
* Copyright (c) 2012 Daniel Borkmann, <daniel.borkmann@tik.ee.ethz.ch>
* Copyright (c) 2012 Ariane Keller, <ariane.keller@tik.ee.ethz.ch>
*/
#include <linux/of_address.h>
#include <linux/of_mdio.h>
#include <linux/jiffies.h>
#include "xilinx_axienet.h"
#define MAX_MDIO_FREQ 2500000 /* 2.5 MHz */
#define DEFAULT_CLOCK_DIVISOR XAE_MDIO_DIV_DFT
/* Wait till MDIO interface is ready to accept a new transaction.*/
int axienet_mdio_wait_until_ready(struct axienet_local *lp)
{
long end = jiffies + 2;
while (!(axienet_ior(lp, XAE_MDIO_MCR_OFFSET) &
XAE_MDIO_MCR_READY_MASK)) {
if (end - jiffies <= 0) {
WARN_ON(1);
return -ETIMEDOUT;
}
udelay(1);
}
return 0;
}
/**
* axienet_mdio_read - MDIO interface read function
* @bus: Pointer to mii bus structure
* @phy_id: Address of the PHY device
* @reg: PHY register to read
*
* returns: The register contents on success, -ETIMEDOUT on a timeout
*
* Reads the contents of the requested register from the requested PHY
* address by first writing the details into MCR register. After a while
* the register MRD is read to obtain the PHY register content.
*/
static int axienet_mdio_read(struct mii_bus *bus, int phy_id, int reg)
{
u32 rc;
int ret;
struct axienet_local *lp = bus->priv;
ret = axienet_mdio_wait_until_ready(lp);
if (ret < 0)
return ret;
axienet_iow(lp, XAE_MDIO_MCR_OFFSET,
(((phy_id << XAE_MDIO_MCR_PHYAD_SHIFT) &
XAE_MDIO_MCR_PHYAD_MASK) |
((reg << XAE_MDIO_MCR_REGAD_SHIFT) &
XAE_MDIO_MCR_REGAD_MASK) |
XAE_MDIO_MCR_INITIATE_MASK |
XAE_MDIO_MCR_OP_READ_MASK));
ret = axienet_mdio_wait_until_ready(lp);
if (ret < 0)
return ret;
rc = axienet_ior(lp, XAE_MDIO_MRD_OFFSET) & 0x0000FFFF;
dev_dbg(lp->dev, "axienet_mdio_read(phy_id=%i, reg=%x) == %x\n",
phy_id, reg, rc);
return rc;
}
/**
* axienet_mdio_write - MDIO interface write function
* @bus: Pointer to mii bus structure
* @phy_id: Address of the PHY device
* @reg: PHY register to write to
* @val: Value to be written into the register
*
* returns: 0 on success, -ETIMEDOUT on a timeout
*
* Writes the value to the requested register by first writing the value
* into MWD register. The the MCR register is then appropriately setup
* to finish the write operation.
*/
static int axienet_mdio_write(struct mii_bus *bus, int phy_id, int reg,
u16 val)
{
int ret;
struct axienet_local *lp = bus->priv;
dev_dbg(lp->dev, "axienet_mdio_write(phy_id=%i, reg=%x, val=%x)\n",
phy_id, reg, val);
ret = axienet_mdio_wait_until_ready(lp);
if (ret < 0)
return ret;
axienet_iow(lp, XAE_MDIO_MWD_OFFSET, (u32) val);
axienet_iow(lp, XAE_MDIO_MCR_OFFSET,
(((phy_id << XAE_MDIO_MCR_PHYAD_SHIFT) &
XAE_MDIO_MCR_PHYAD_MASK) |
((reg << XAE_MDIO_MCR_REGAD_SHIFT) &
XAE_MDIO_MCR_REGAD_MASK) |
XAE_MDIO_MCR_INITIATE_MASK |
XAE_MDIO_MCR_OP_WRITE_MASK));
ret = axienet_mdio_wait_until_ready(lp);
if (ret < 0)
return ret;
return 0;
}
/**
* axienet_mdio_setup - MDIO setup function
* @lp: Pointer to axienet local data structure.
* @np: Pointer to device node
*
* returns: 0 on success, -ETIMEDOUT on a timeout, -ENOMEM when
* mdiobus_alloc (to allocate memory for mii bus structure) fails.
*
* Sets up the MDIO interface by initializing the MDIO clock and enabling the
* MDIO interface in hardware. Register the MDIO interface.
**/
int axienet_mdio_setup(struct axienet_local *lp, struct device_node *np)
{
int ret;
u32 clk_div, host_clock;
u32 *property_p;
struct mii_bus *bus;
struct resource res;
struct device_node *np1;
/* clk_div can be calculated by deriving it from the equation:
* fMDIO = fHOST / ((1 + clk_div) * 2)
*
* Where fMDIO <= 2500000, so we get:
* fHOST / ((1 + clk_div) * 2) <= 2500000
*
* Then we get:
* 1 / ((1 + clk_div) * 2) <= (2500000 / fHOST)
*
* Then we get:
* 1 / (1 + clk_div) <= ((2500000 * 2) / fHOST)
*
* Then we get:
* 1 / (1 + clk_div) <= (5000000 / fHOST)
*
* So:
* (1 + clk_div) >= (fHOST / 5000000)
*
* And finally:
* clk_div >= (fHOST / 5000000) - 1
*
* fHOST can be read from the flattened device tree as property
* "clock-frequency" from the CPU
*/
np1 = of_find_node_by_name(NULL, "cpu");
if (!np1) {
printk(KERN_WARNING "%s(): Could not find CPU device node.",
__func__);
printk(KERN_WARNING "Setting MDIO clock divisor to "
"default %d\n", DEFAULT_CLOCK_DIVISOR);
clk_div = DEFAULT_CLOCK_DIVISOR;
goto issue;
}
property_p = (u32 *) of_get_property(np1, "clock-frequency", NULL);
if (!property_p) {
printk(KERN_WARNING "%s(): Could not find CPU property: "
"clock-frequency.", __func__);
printk(KERN_WARNING "Setting MDIO clock divisor to "
"default %d\n", DEFAULT_CLOCK_DIVISOR);
clk_div = DEFAULT_CLOCK_DIVISOR;
goto issue;
}
host_clock = be32_to_cpup(property_p);
clk_div = (host_clock / (MAX_MDIO_FREQ * 2)) - 1;
/* If there is any remainder from the division of
* fHOST / (MAX_MDIO_FREQ * 2), then we need to add
* 1 to the clock divisor or we will surely be above 2.5 MHz */
if (host_clock % (MAX_MDIO_FREQ * 2))
clk_div++;
printk(KERN_DEBUG "%s(): Setting MDIO clock divisor to %u based "
"on %u Hz host clock.\n", __func__, clk_div, host_clock);
of_node_put(np1);
issue:
axienet_iow(lp, XAE_MDIO_MC_OFFSET,
(((u32) clk_div) | XAE_MDIO_MC_MDIOEN_MASK));
ret = axienet_mdio_wait_until_ready(lp);
if (ret < 0)
return ret;
bus = mdiobus_alloc();
if (!bus)
return -ENOMEM;
np1 = of_get_parent(lp->phy_node);
of_address_to_resource(np1, 0, &res);
snprintf(bus->id, MII_BUS_ID_SIZE, "%.8llx",
(unsigned long long) res.start);
bus->priv = lp;
bus->name = "Xilinx Axi Ethernet MDIO";
bus->read = axienet_mdio_read;
bus->write = axienet_mdio_write;
bus->parent = lp->dev;
bus->irq = lp->mdio_irqs; /* preallocated IRQ table */
lp->mii_bus = bus;
ret = of_mdiobus_register(bus, np1);
if (ret) {
mdiobus_free(bus);
return ret;
}
return 0;
}
/**
* axienet_mdio_teardown - MDIO remove function
* @lp: Pointer to axienet local data structure.
*
* Unregisters the MDIO and frees any associate memory for mii bus.
*/
void axienet_mdio_teardown(struct axienet_local *lp)
{
mdiobus_unregister(lp->mii_bus);
kfree(lp->mii_bus->irq);
mdiobus_free(lp->mii_bus);
lp->mii_bus = NULL;
}