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Message-Id: <1394655334-29547-7-git-send-email-vbridgers2013@gmail.com>
Date: Wed, 12 Mar 2014 15:15:31 -0500
From: Vince Bridgers <vbridgers2013@...il.com>
To: devicetree@...r.kernel.org, netdev@...r.kernel.org,
linux-doc@...r.kernel.org
Cc: robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
rob@...dley.net, vbridgers2013@...il.com
Subject: [PATCH net-next V4 6/9] Altera TSE: Add main and header file for Altera Ethernet Driver
This patch adds the main driver and header file for the Altera Triple
Speed Ethernet driver.
Signed-off-by: Vince Bridgers <vbridgers2013@...il.com>
---
V4: - Remove logging for OOM errors - generic OOM errors log messages
- Modify use of dev_* logging to use netdev_* logging where possible
V3: - Reorder commits
- Use of_get_mac_address instead of of_get_property
- Change supplemental unicast address and hash filter property
names and types.
- Added check for failure from of_phy_connect and connect_local_phy
- Correct code to find mdio node child node
V2: - Address all comments from initial RFC (thanks Florian!)
- Moved asm/cacheflush.h to bottom of header includes
- Remove barriers since DMA APIs ensure memory consistency
- Add max-frame-size property
- Use accessor function of_get_phy_mode instead of custom function
- Remove custom function to access devicetree, use of APIs
- Deprecate use of Altera devicetree properties where standard
ones exist
- Remove use of netif_carrier_off - not necessary where it was used
- Move probing of phy to the probe routine instead of open
- use ether_addr_copy instead of memcpy
---
drivers/net/ethernet/altera/altera_tse.h | 486 ++++++++
drivers/net/ethernet/altera/altera_tse_main.c | 1535 +++++++++++++++++++++++++
2 files changed, 2021 insertions(+)
create mode 100644 drivers/net/ethernet/altera/altera_tse.h
create mode 100644 drivers/net/ethernet/altera/altera_tse_main.c
diff --git a/drivers/net/ethernet/altera/altera_tse.h b/drivers/net/ethernet/altera/altera_tse.h
new file mode 100644
index 0000000..f0e39b1
--- /dev/null
+++ b/drivers/net/ethernet/altera/altera_tse.h
@@ -0,0 +1,486 @@
+/* Altera Triple-Speed Ethernet MAC driver
+ * Copyright (C) 2008-2014 Altera Corporation. All rights reserved
+ *
+ * Contributors:
+ * Dalon Westergreen
+ * Thomas Chou
+ * Ian Abbott
+ * Yuriy Kozlov
+ * Tobias Klauser
+ * Andriy Smolskyy
+ * Roman Bulgakov
+ * Dmytro Mytarchuk
+ * Matthew Gerlach
+ *
+ * Original driver contributed by SLS.
+ * Major updates contributed by GlobalLogic
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __ALTERA_TSE_H__
+#define __ALTERA_TSE_H__
+
+#define ALTERA_TSE_RESOURCE_NAME "altera_tse"
+
+#include <linux/bitops.h>
+#include <linux/if_vlan.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+
+#define ALTERA_TSE_SW_RESET_WATCHDOG_CNTR 10000
+#define ALTERA_TSE_MAC_FIFO_WIDTH 4 /* TX/RX FIFO width in
+ * bytes
+ */
+/* Rx FIFO default settings */
+#define ALTERA_TSE_RX_SECTION_EMPTY 16
+#define ALTERA_TSE_RX_SECTION_FULL 0
+#define ALTERA_TSE_RX_ALMOST_EMPTY 8
+#define ALTERA_TSE_RX_ALMOST_FULL 8
+
+/* Tx FIFO default settings */
+#define ALTERA_TSE_TX_SECTION_EMPTY 16
+#define ALTERA_TSE_TX_SECTION_FULL 0
+#define ALTERA_TSE_TX_ALMOST_EMPTY 8
+#define ALTERA_TSE_TX_ALMOST_FULL 3
+
+/* MAC function configuration default settings */
+#define ALTERA_TSE_TX_IPG_LENGTH 12
+
+#define GET_BIT_VALUE(v, bit) (((v) >> (bit)) & 0x1)
+
+/* MAC Command_Config Register Bit Definitions
+ */
+#define MAC_CMDCFG_TX_ENA BIT(0)
+#define MAC_CMDCFG_RX_ENA BIT(1)
+#define MAC_CMDCFG_XON_GEN BIT(2)
+#define MAC_CMDCFG_ETH_SPEED BIT(3)
+#define MAC_CMDCFG_PROMIS_EN BIT(4)
+#define MAC_CMDCFG_PAD_EN BIT(5)
+#define MAC_CMDCFG_CRC_FWD BIT(6)
+#define MAC_CMDCFG_PAUSE_FWD BIT(7)
+#define MAC_CMDCFG_PAUSE_IGNORE BIT(8)
+#define MAC_CMDCFG_TX_ADDR_INS BIT(9)
+#define MAC_CMDCFG_HD_ENA BIT(10)
+#define MAC_CMDCFG_EXCESS_COL BIT(11)
+#define MAC_CMDCFG_LATE_COL BIT(12)
+#define MAC_CMDCFG_SW_RESET BIT(13)
+#define MAC_CMDCFG_MHASH_SEL BIT(14)
+#define MAC_CMDCFG_LOOP_ENA BIT(15)
+#define MAC_CMDCFG_TX_ADDR_SEL(v) (((v) & 0x7) << 16)
+#define MAC_CMDCFG_MAGIC_ENA BIT(19)
+#define MAC_CMDCFG_SLEEP BIT(20)
+#define MAC_CMDCFG_WAKEUP BIT(21)
+#define MAC_CMDCFG_XOFF_GEN BIT(22)
+#define MAC_CMDCFG_CNTL_FRM_ENA BIT(23)
+#define MAC_CMDCFG_NO_LGTH_CHECK BIT(24)
+#define MAC_CMDCFG_ENA_10 BIT(25)
+#define MAC_CMDCFG_RX_ERR_DISC BIT(26)
+#define MAC_CMDCFG_DISABLE_READ_TIMEOUT BIT(27)
+#define MAC_CMDCFG_CNT_RESET BIT(31)
+
+#define MAC_CMDCFG_TX_ENA_GET(v) GET_BIT_VALUE(v, 0)
+#define MAC_CMDCFG_RX_ENA_GET(v) GET_BIT_VALUE(v, 1)
+#define MAC_CMDCFG_XON_GEN_GET(v) GET_BIT_VALUE(v, 2)
+#define MAC_CMDCFG_ETH_SPEED_GET(v) GET_BIT_VALUE(v, 3)
+#define MAC_CMDCFG_PROMIS_EN_GET(v) GET_BIT_VALUE(v, 4)
+#define MAC_CMDCFG_PAD_EN_GET(v) GET_BIT_VALUE(v, 5)
+#define MAC_CMDCFG_CRC_FWD_GET(v) GET_BIT_VALUE(v, 6)
+#define MAC_CMDCFG_PAUSE_FWD_GET(v) GET_BIT_VALUE(v, 7)
+#define MAC_CMDCFG_PAUSE_IGNORE_GET(v) GET_BIT_VALUE(v, 8)
+#define MAC_CMDCFG_TX_ADDR_INS_GET(v) GET_BIT_VALUE(v, 9)
+#define MAC_CMDCFG_HD_ENA_GET(v) GET_BIT_VALUE(v, 10)
+#define MAC_CMDCFG_EXCESS_COL_GET(v) GET_BIT_VALUE(v, 11)
+#define MAC_CMDCFG_LATE_COL_GET(v) GET_BIT_VALUE(v, 12)
+#define MAC_CMDCFG_SW_RESET_GET(v) GET_BIT_VALUE(v, 13)
+#define MAC_CMDCFG_MHASH_SEL_GET(v) GET_BIT_VALUE(v, 14)
+#define MAC_CMDCFG_LOOP_ENA_GET(v) GET_BIT_VALUE(v, 15)
+#define MAC_CMDCFG_TX_ADDR_SEL_GET(v) (((v) >> 16) & 0x7)
+#define MAC_CMDCFG_MAGIC_ENA_GET(v) GET_BIT_VALUE(v, 19)
+#define MAC_CMDCFG_SLEEP_GET(v) GET_BIT_VALUE(v, 20)
+#define MAC_CMDCFG_WAKEUP_GET(v) GET_BIT_VALUE(v, 21)
+#define MAC_CMDCFG_XOFF_GEN_GET(v) GET_BIT_VALUE(v, 22)
+#define MAC_CMDCFG_CNTL_FRM_ENA_GET(v) GET_BIT_VALUE(v, 23)
+#define MAC_CMDCFG_NO_LGTH_CHECK_GET(v) GET_BIT_VALUE(v, 24)
+#define MAC_CMDCFG_ENA_10_GET(v) GET_BIT_VALUE(v, 25)
+#define MAC_CMDCFG_RX_ERR_DISC_GET(v) GET_BIT_VALUE(v, 26)
+#define MAC_CMDCFG_DISABLE_READ_TIMEOUT_GET(v) GET_BIT_VALUE(v, 27)
+#define MAC_CMDCFG_CNT_RESET_GET(v) GET_BIT_VALUE(v, 31)
+
+/* MDIO registers within MAC register Space
+ */
+struct altera_tse_mdio {
+ unsigned int control; /* PHY device operation control register */
+ unsigned int status; /* PHY device operation status register */
+ unsigned int phy_id1; /* Bits 31:16 of PHY identifier */
+ unsigned int phy_id2; /* Bits 15:0 of PHY identifier */
+ unsigned int auto_negotiation_advertisement; /* Auto-negotiation
+ * advertisement
+ * register
+ */
+ unsigned int remote_partner_base_page_ability;
+
+ unsigned int reg6;
+ unsigned int reg7;
+ unsigned int reg8;
+ unsigned int reg9;
+ unsigned int rega;
+ unsigned int regb;
+ unsigned int regc;
+ unsigned int regd;
+ unsigned int rege;
+ unsigned int regf;
+ unsigned int reg10;
+ unsigned int reg11;
+ unsigned int reg12;
+ unsigned int reg13;
+ unsigned int reg14;
+ unsigned int reg15;
+ unsigned int reg16;
+ unsigned int reg17;
+ unsigned int reg18;
+ unsigned int reg19;
+ unsigned int reg1a;
+ unsigned int reg1b;
+ unsigned int reg1c;
+ unsigned int reg1d;
+ unsigned int reg1e;
+ unsigned int reg1f;
+};
+
+/* MAC register Space. Note that some of these registers may or may not be
+ * present depending upon options chosen by the user when the core was
+ * configured and built. Please consult the Altera Triple Speed Ethernet User
+ * Guide for details.
+ */
+struct altera_tse_mac {
+ /* Bits 15:0: MegaCore function revision (0x0800). Bit 31:16: Customer
+ * specific revision
+ */
+ unsigned int megacore_revision;
+ /* Provides a memory location for user applications to test the device
+ * memory operation.
+ */
+ unsigned int scratch_pad;
+ /* The host processor uses this register to control and configure the
+ * MAC block
+ */
+ unsigned int command_config;
+ /* 32-bit primary MAC address word 0 bits 0 to 31 of the primary
+ * MAC address
+ */
+ unsigned int mac_addr_0;
+ /* 32-bit primary MAC address word 1 bits 32 to 47 of the primary
+ * MAC address
+ */
+ unsigned int mac_addr_1;
+ /* 14-bit maximum frame length. The MAC receive logic */
+ unsigned int frm_length;
+ /* The pause quanta is used in each pause frame sent to a remote
+ * Ethernet device, in increments of 512 Ethernet bit times
+ */
+ unsigned int pause_quanta;
+ /* 12-bit receive FIFO section-empty threshold */
+ unsigned int rx_section_empty;
+ /* 12-bit receive FIFO section-full threshold */
+ unsigned int rx_section_full;
+ /* 12-bit transmit FIFO section-empty threshold */
+ unsigned int tx_section_empty;
+ /* 12-bit transmit FIFO section-full threshold */
+ unsigned int tx_section_full;
+ /* 12-bit receive FIFO almost-empty threshold */
+ unsigned int rx_almost_empty;
+ /* 12-bit receive FIFO almost-full threshold */
+ unsigned int rx_almost_full;
+ /* 12-bit transmit FIFO almost-empty threshold */
+ unsigned int tx_almost_empty;
+ /* 12-bit transmit FIFO almost-full threshold */
+ unsigned int tx_almost_full;
+ /* MDIO address of PHY Device 0. Bits 0 to 4 hold a 5-bit PHY address */
+ unsigned int mdio_phy0_addr;
+ /* MDIO address of PHY Device 1. Bits 0 to 4 hold a 5-bit PHY address */
+ unsigned int mdio_phy1_addr;
+
+ /* Bit[15:0]—16-bit holdoff quanta */
+ unsigned int holdoff_quant;
+
+ /* only if 100/1000 BaseX PCS, reserved otherwise */
+ unsigned int reserved1[5];
+
+ /* Minimum IPG between consecutive transmit frame in terms of bytes */
+ unsigned int tx_ipg_length;
+
+ /* IEEE 802.3 oEntity Managed Object Support */
+
+ /* The MAC addresses */
+ unsigned int mac_id_1;
+ unsigned int mac_id_2;
+
+ /* Number of frames transmitted without error including pause frames */
+ unsigned int frames_transmitted_ok;
+ /* Number of frames received without error including pause frames */
+ unsigned int frames_received_ok;
+ /* Number of frames received with a CRC error */
+ unsigned int frames_check_sequence_errors;
+ /* Frame received with an alignment error */
+ unsigned int alignment_errors;
+ /* Sum of payload and padding octets of frames transmitted without
+ * error
+ */
+ unsigned int octets_transmitted_ok;
+ /* Sum of payload and padding octets of frames received without error */
+ unsigned int octets_received_ok;
+
+ /* IEEE 802.3 oPausedEntity Managed Object Support */
+
+ /* Number of transmitted pause frames */
+ unsigned int tx_pause_mac_ctrl_frames;
+ /* Number of Received pause frames */
+ unsigned int rx_pause_mac_ctrl_frames;
+
+ /* IETF MIB (MIB-II) Object Support */
+
+ /* Number of frames received with error */
+ unsigned int if_in_errors;
+ /* Number of frames transmitted with error */
+ unsigned int if_out_errors;
+ /* Number of valid received unicast frames */
+ unsigned int if_in_ucast_pkts;
+ /* Number of valid received multicasts frames (without pause) */
+ unsigned int if_in_multicast_pkts;
+ /* Number of valid received broadcast frames */
+ unsigned int if_in_broadcast_pkts;
+ unsigned int if_out_discards;
+ /* The number of valid unicast frames transmitted */
+ unsigned int if_out_ucast_pkts;
+ /* The number of valid multicast frames transmitted,
+ * excluding pause frames
+ */
+ unsigned int if_out_multicast_pkts;
+ unsigned int if_out_broadcast_pkts;
+
+ /* IETF RMON MIB Object Support */
+
+ /* Counts the number of dropped packets due to internal errors
+ * of the MAC client.
+ */
+ unsigned int ether_stats_drop_events;
+ /* Total number of bytes received. Good and bad frames. */
+ unsigned int ether_stats_octets;
+ /* Total number of packets received. Counts good and bad packets. */
+ unsigned int ether_stats_pkts;
+ /* Number of packets received with less than 64 bytes. */
+ unsigned int ether_stats_undersize_pkts;
+ /* The number of frames received that are longer than the
+ * value configured in the frm_length register
+ */
+ unsigned int ether_stats_oversize_pkts;
+ /* Number of received packet with 64 bytes */
+ unsigned int ether_stats_pkts_64_octets;
+ /* Frames (good and bad) with 65 to 127 bytes */
+ unsigned int ether_stats_pkts_65to127_octets;
+ /* Frames (good and bad) with 128 to 255 bytes */
+ unsigned int ether_stats_pkts_128to255_octets;
+ /* Frames (good and bad) with 256 to 511 bytes */
+ unsigned int ether_stats_pkts_256to511_octets;
+ /* Frames (good and bad) with 512 to 1023 bytes */
+ unsigned int ether_stats_pkts_512to1023_octets;
+ /* Frames (good and bad) with 1024 to 1518 bytes */
+ unsigned int ether_stats_pkts_1024to1518_octets;
+
+ /* Any frame length from 1519 to the maximum length configured in the
+ * frm_length register, if it is greater than 1518
+ */
+ unsigned int ether_stats_pkts_1519tox_octets;
+ /* Too long frames with CRC error */
+ unsigned int ether_stats_jabbers;
+ /* Too short frames with CRC error */
+ unsigned int ether_stats_fragments;
+
+ unsigned int reserved2;
+
+ /* FIFO control register */
+ unsigned int tx_cmd_stat;
+ unsigned int rx_cmd_stat;
+
+ /* Extended Statistics Counters */
+ unsigned int msb_octets_transmitted_ok;
+ unsigned int msb_octets_received_ok;
+ unsigned int msb_ether_stats_octets;
+
+ unsigned int reserved3;
+
+ /* Multicast address resolution table, mapped in the controller address
+ * space
+ */
+ unsigned int hash_table[64];
+
+ /* Registers 0 to 31 within PHY device 0/1 connected to the MDIO PHY
+ * management interface
+ */
+ struct altera_tse_mdio mdio_phy0;
+ struct altera_tse_mdio mdio_phy1;
+
+ /* 4 Supplemental MAC Addresses */
+ unsigned int supp_mac_addr_0_0;
+ unsigned int supp_mac_addr_0_1;
+ unsigned int supp_mac_addr_1_0;
+ unsigned int supp_mac_addr_1_1;
+ unsigned int supp_mac_addr_2_0;
+ unsigned int supp_mac_addr_2_1;
+ unsigned int supp_mac_addr_3_0;
+ unsigned int supp_mac_addr_3_1;
+
+ unsigned int reserved4[8];
+
+ /* IEEE 1588v2 Feature */
+ unsigned int tx_period;
+ unsigned int tx_adjust_fns;
+ unsigned int tx_adjust_ns;
+ unsigned int rx_period;
+ unsigned int rx_adjust_fns;
+ unsigned int rx_adjust_ns;
+
+ unsigned int reserved5[42];
+};
+
+/* Transmit and Receive Command Registers Bit Definitions
+ */
+#define ALTERA_TSE_TX_CMD_STAT_OMIT_CRC BIT(17)
+#define ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16 BIT(18)
+#define ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16 BIT(25)
+
+/* Wrapper around a pointer to a socket buffer,
+ * so a DMA handle can be stored along with the buffer
+ */
+struct tse_buffer {
+ struct list_head lh;
+ struct sk_buff *skb;
+ dma_addr_t dma_addr;
+ unsigned int len;
+ int mapped_as_page;
+};
+
+struct altera_tse_private;
+
+#define ALTERA_DTYPE_SGDMA 1
+#define ALTERA_DTYPE_MSGDMA 2
+
+/* standard DMA interface for SGDMA and MSGDMA */
+struct altera_dmaops {
+ int altera_dtype;
+ int dmamask;
+ void (*reset_dma)(struct altera_tse_private *);
+ void (*enable_txirq)(struct altera_tse_private *);
+ void (*enable_rxirq)(struct altera_tse_private *);
+ void (*disable_txirq)(struct altera_tse_private *);
+ void (*disable_rxirq)(struct altera_tse_private *);
+ void (*clear_txirq)(struct altera_tse_private *);
+ void (*clear_rxirq)(struct altera_tse_private *);
+ int (*tx_buffer)(struct altera_tse_private *, struct tse_buffer *);
+ u32 (*tx_completions)(struct altera_tse_private *);
+ int (*add_rx_desc)(struct altera_tse_private *, struct tse_buffer *);
+ u32 (*get_rx_status)(struct altera_tse_private *);
+ int (*init_dma)(struct altera_tse_private *);
+ void (*uninit_dma)(struct altera_tse_private *);
+};
+
+/* This structure is private to each device.
+ */
+struct altera_tse_private {
+ struct net_device *dev;
+ struct device *device;
+ struct napi_struct napi;
+
+ /* MAC address space */
+ struct altera_tse_mac *mac_dev;
+
+ /* TSE Revision */
+ u32 revision;
+
+ /* mSGDMA Rx Dispatcher address space */
+ void __iomem *rx_dma_csr;
+ void __iomem *rx_dma_desc;
+ void __iomem *rx_dma_resp;
+
+ /* mSGDMA Tx Dispatcher address space */
+ void __iomem *tx_dma_csr;
+ void __iomem *tx_dma_desc;
+
+ /* Rx buffers queue */
+ struct tse_buffer *rx_ring;
+ unsigned int rx_cons;
+ unsigned int rx_prod;
+ unsigned int rx_ring_size;
+ unsigned int rx_dma_buf_sz;
+
+ /* Tx ring buffer */
+ struct tse_buffer *tx_ring;
+ unsigned int tx_prod;
+ unsigned int tx_cons;
+ unsigned int tx_ring_size;
+
+ /* Interrupts */
+ unsigned int tx_irq;
+ unsigned int rx_irq;
+
+ /* RX/TX MAC FIFO configs */
+ unsigned int tx_fifo_depth;
+ unsigned int rx_fifo_depth;
+ unsigned int max_mtu;
+
+ /* Hash filter settings */
+ unsigned int hash_filter;
+ unsigned int added_unicast;
+
+ /* Descriptor memory info for managing SGDMA */
+ unsigned int txdescmem;
+ unsigned int rxdescmem;
+ dma_addr_t rxdescmem_busaddr;
+ dma_addr_t txdescmem_busaddr;
+ unsigned int txctrlreg;
+ unsigned int rxctrlreg;
+ dma_addr_t rxdescphys;
+ dma_addr_t txdescphys;
+
+ struct list_head txlisthd;
+ struct list_head rxlisthd;
+
+ /* MAC command_config register protection */
+ spinlock_t mac_cfg_lock;
+ /* Tx path protection */
+ spinlock_t tx_lock;
+ /* Rx DMA & interrupt control protection */
+ spinlock_t rxdma_irq_lock;
+
+ /* PHY */
+ int phy_addr; /* PHY's MDIO address, -1 for autodetection */
+ phy_interface_t phy_iface;
+ struct mii_bus *mdio;
+ struct phy_device *phydev;
+ int oldspeed;
+ int oldduplex;
+ int oldlink;
+
+ /* ethtool msglvl option */
+ u32 msg_enable;
+
+ struct altera_dmaops *dmaops;
+};
+
+/* Function prototypes
+ */
+void altera_tse_set_ethtool_ops(struct net_device *);
+
+#endif /* __ALTERA_TSE_H__ */
diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c
new file mode 100644
index 0000000..a90759c
--- /dev/null
+++ b/drivers/net/ethernet/altera/altera_tse_main.c
@@ -0,0 +1,1535 @@
+/* Altera Triple-Speed Ethernet MAC driver
+ * Copyright (C) 2008-2014 Altera Corporation. All rights reserved
+ *
+ * Contributors:
+ * Dalon Westergreen
+ * Thomas Chou
+ * Ian Abbott
+ * Yuriy Kozlov
+ * Tobias Klauser
+ * Andriy Smolskyy
+ * Roman Bulgakov
+ * Dmytro Mytarchuk
+ * Matthew Gerlach
+ *
+ * Original driver contributed by SLS.
+ * Major updates contributed by GlobalLogic
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/atomic.h>
+#include <linux/delay.h>
+#include <linux/etherdevice.h>
+#include <linux/if_vlan.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/of_device.h>
+#include <linux/of_mdio.h>
+#include <linux/of_net.h>
+#include <linux/of_platform.h>
+#include <linux/phy.h>
+#include <linux/platform_device.h>
+#include <linux/skbuff.h>
+#include <asm/cacheflush.h>
+
+#include "altera_utils.h"
+#include "altera_tse.h"
+#include "altera_sgdma.h"
+#include "altera_msgdma.h"
+
+static atomic_t instance_count = ATOMIC_INIT(~0);
+/* Module parameters */
+static int debug = -1;
+module_param(debug, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)");
+
+static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
+ NETIF_MSG_LINK | NETIF_MSG_IFUP |
+ NETIF_MSG_IFDOWN);
+
+#define RX_DESCRIPTORS 64
+static int dma_rx_num = RX_DESCRIPTORS;
+module_param(dma_rx_num, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dma_rx_num, "Number of descriptors in the RX list");
+
+#define TX_DESCRIPTORS 64
+static int dma_tx_num = TX_DESCRIPTORS;
+module_param(dma_tx_num, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(dma_tx_num, "Number of descriptors in the TX list");
+
+
+#define POLL_PHY (-1)
+
+/* Make sure DMA buffer size is larger than the max frame size
+ * plus some alignment offset and a VLAN header. If the max frame size is
+ * 1518, a VLAN header would be additional 4 bytes and additional
+ * headroom for alignment is 2 bytes, 2048 is just fine.
+ */
+#define ALTERA_RXDMABUFFER_SIZE 2048
+
+/* Allow network stack to resume queueing packets after we've
+ * finished transmitting at least 1/4 of the packets in the queue.
+ */
+#define TSE_TX_THRESH(x) (x->tx_ring_size / 4)
+
+#define TXQUEUESTOP_THRESHHOLD 2
+
+static struct of_device_id altera_tse_ids[];
+
+static inline u32 tse_tx_avail(struct altera_tse_private *priv)
+{
+ return priv->tx_cons + priv->tx_ring_size - priv->tx_prod - 1;
+}
+
+/* MDIO specific functions
+ */
+static int altera_tse_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
+{
+ struct altera_tse_mac *mac = (struct altera_tse_mac *)bus->priv;
+ unsigned int *mdio_regs = (unsigned int *)&mac->mdio_phy0;
+ u32 data;
+
+ /* set MDIO address */
+ iowrite32((mii_id & 0x1f), &mac->mdio_phy0_addr);
+
+ /* get the data */
+ data = ioread32(&mdio_regs[regnum]) & 0xffff;
+ return data;
+}
+
+static int altera_tse_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
+ u16 value)
+{
+ struct altera_tse_mac *mac = (struct altera_tse_mac *)bus->priv;
+ unsigned int *mdio_regs = (unsigned int *)&mac->mdio_phy0;
+
+ /* set MDIO address */
+ iowrite32((mii_id & 0x1f), &mac->mdio_phy0_addr);
+
+ /* write the data */
+ iowrite32((u32) value, &mdio_regs[regnum]);
+ return 0;
+}
+
+static int altera_tse_mdio_create(struct net_device *dev, unsigned int id)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ int ret;
+ int i;
+ struct device_node *mdio_node = NULL;
+ struct mii_bus *mdio = NULL;
+ struct device_node *child_node = NULL;
+
+ for_each_child_of_node(priv->device->of_node, child_node) {
+ if (of_device_is_compatible(child_node, "altr,tse-mdio")) {
+ mdio_node = child_node;
+ break;
+ }
+ }
+
+ if (mdio_node) {
+ netdev_dbg(dev, "FOUND MDIO subnode\n");
+ } else {
+ netdev_dbg(dev, "NO MDIO subnode\n");
+ return 0;
+ }
+
+ mdio = mdiobus_alloc();
+ if (mdio == NULL) {
+ netdev_err(dev, "Error allocating MDIO bus\n");
+ return -ENOMEM;
+ }
+
+ mdio->name = ALTERA_TSE_RESOURCE_NAME;
+ mdio->read = &altera_tse_mdio_read;
+ mdio->write = &altera_tse_mdio_write;
+ snprintf(mdio->id, MII_BUS_ID_SIZE, "%s-%u", mdio->name, id);
+
+ mdio->irq = kcalloc(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);
+ if (mdio->irq == NULL) {
+ ret = -ENOMEM;
+ goto out_free_mdio;
+ }
+ for (i = 0; i < PHY_MAX_ADDR; i++)
+ mdio->irq[i] = PHY_POLL;
+
+ mdio->priv = priv->mac_dev;
+ mdio->parent = priv->device;
+
+ ret = of_mdiobus_register(mdio, mdio_node);
+ if (ret != 0) {
+ netdev_err(dev, "Cannot register MDIO bus %s\n",
+ mdio->id);
+ goto out_free_mdio_irq;
+ }
+
+ if (netif_msg_drv(priv))
+ netdev_info(dev, "MDIO bus %s: created\n", mdio->id);
+
+ priv->mdio = mdio;
+ return 0;
+out_free_mdio_irq:
+ kfree(mdio->irq);
+out_free_mdio:
+ mdiobus_free(mdio);
+ mdio = NULL;
+ return ret;
+}
+
+static void altera_tse_mdio_destroy(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+
+ if (priv->mdio == NULL)
+ return;
+
+ if (netif_msg_drv(priv))
+ netdev_info(dev, "MDIO bus %s: removed\n",
+ priv->mdio->id);
+
+ mdiobus_unregister(priv->mdio);
+ kfree(priv->mdio->irq);
+ mdiobus_free(priv->mdio);
+ priv->mdio = NULL;
+}
+
+static int tse_init_rx_buffer(struct altera_tse_private *priv,
+ struct tse_buffer *rxbuffer, int len)
+{
+ rxbuffer->skb = netdev_alloc_skb_ip_align(priv->dev, len);
+ if (!rxbuffer->skb)
+ return -ENOMEM;
+
+ rxbuffer->dma_addr = dma_map_single(priv->device, rxbuffer->skb->data,
+ len,
+ DMA_FROM_DEVICE);
+
+ if (dma_mapping_error(priv->device, rxbuffer->dma_addr)) {
+ netdev_err(priv->dev, "%s: DMA mapping error\n", __func__);
+ dev_kfree_skb_any(rxbuffer->skb);
+ return -EINVAL;
+ }
+ rxbuffer->len = len;
+ return 0;
+}
+
+static void tse_free_rx_buffer(struct altera_tse_private *priv,
+ struct tse_buffer *rxbuffer)
+{
+ struct sk_buff *skb = rxbuffer->skb;
+ dma_addr_t dma_addr = rxbuffer->dma_addr;
+
+ if (skb != NULL) {
+ if (dma_addr)
+ dma_unmap_single(priv->device, dma_addr,
+ rxbuffer->len,
+ DMA_FROM_DEVICE);
+ dev_kfree_skb_any(skb);
+ rxbuffer->skb = NULL;
+ rxbuffer->dma_addr = 0;
+ }
+}
+
+/* Unmap and free Tx buffer resources
+ */
+static void tse_free_tx_buffer(struct altera_tse_private *priv,
+ struct tse_buffer *buffer)
+{
+ if (buffer->dma_addr) {
+ if (buffer->mapped_as_page)
+ dma_unmap_page(priv->device, buffer->dma_addr,
+ buffer->len, DMA_TO_DEVICE);
+ else
+ dma_unmap_single(priv->device, buffer->dma_addr,
+ buffer->len, DMA_TO_DEVICE);
+ buffer->dma_addr = 0;
+ }
+ if (buffer->skb) {
+ dev_kfree_skb_any(buffer->skb);
+ buffer->skb = NULL;
+ }
+}
+
+static int alloc_init_skbufs(struct altera_tse_private *priv)
+{
+ unsigned int rx_descs = priv->rx_ring_size;
+ unsigned int tx_descs = priv->tx_ring_size;
+ int ret = -ENOMEM;
+ int i;
+
+ /* Create Rx ring buffer */
+ priv->rx_ring = kcalloc(rx_descs, sizeof(struct tse_buffer),
+ GFP_KERNEL);
+ if (!priv->rx_ring)
+ goto err_rx_ring;
+
+ /* Create Tx ring buffer */
+ priv->tx_ring = kcalloc(tx_descs, sizeof(struct tse_buffer),
+ GFP_KERNEL);
+ if (!priv->tx_ring)
+ goto err_tx_ring;
+
+ priv->tx_cons = 0;
+ priv->tx_prod = 0;
+
+ /* Init Rx ring */
+ for (i = 0; i < rx_descs; i++) {
+ ret = tse_init_rx_buffer(priv, &priv->rx_ring[i],
+ priv->rx_dma_buf_sz);
+ if (ret)
+ goto err_init_rx_buffers;
+ }
+
+ priv->rx_cons = 0;
+ priv->rx_prod = 0;
+
+ return 0;
+err_init_rx_buffers:
+ while (--i >= 0)
+ tse_free_rx_buffer(priv, &priv->rx_ring[i]);
+ kfree(priv->tx_ring);
+err_tx_ring:
+ kfree(priv->rx_ring);
+err_rx_ring:
+ return ret;
+}
+
+static void free_skbufs(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ unsigned int rx_descs = priv->rx_ring_size;
+ unsigned int tx_descs = priv->tx_ring_size;
+ int i;
+
+ /* Release the DMA TX/RX socket buffers */
+ for (i = 0; i < rx_descs; i++)
+ tse_free_rx_buffer(priv, &priv->rx_ring[i]);
+ for (i = 0; i < tx_descs; i++)
+ tse_free_tx_buffer(priv, &priv->tx_ring[i]);
+
+
+ kfree(priv->tx_ring);
+}
+
+/* Reallocate the skb for the reception process
+ */
+static inline void tse_rx_refill(struct altera_tse_private *priv)
+{
+ unsigned int rxsize = priv->rx_ring_size;
+ unsigned int entry;
+ int ret;
+
+ for (; priv->rx_cons - priv->rx_prod > 0;
+ priv->rx_prod++) {
+ entry = priv->rx_prod % rxsize;
+ if (likely(priv->rx_ring[entry].skb == NULL)) {
+ ret = tse_init_rx_buffer(priv, &priv->rx_ring[entry],
+ priv->rx_dma_buf_sz);
+ if (unlikely(ret != 0))
+ break;
+ priv->dmaops->add_rx_desc(priv, &priv->rx_ring[entry]);
+ }
+ }
+}
+
+/* Pull out the VLAN tag and fix up the packet
+ */
+static inline void tse_rx_vlan(struct net_device *dev, struct sk_buff *skb)
+{
+ struct ethhdr *eth_hdr;
+ u16 vid;
+ if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
+ !__vlan_get_tag(skb, &vid)) {
+ eth_hdr = (struct ethhdr *)skb->data;
+ memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
+ skb_pull(skb, VLAN_HLEN);
+ __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
+ }
+}
+
+/* Receive a packet: retrieve and pass over to upper levels
+ */
+static int tse_rx(struct altera_tse_private *priv, int limit)
+{
+ unsigned int count = 0;
+ unsigned int next_entry;
+ struct sk_buff *skb;
+ unsigned int entry = priv->rx_cons % priv->rx_ring_size;
+ u32 rxstatus;
+ u16 pktlength;
+ u16 pktstatus;
+
+ while ((rxstatus = priv->dmaops->get_rx_status(priv)) != 0) {
+ pktstatus = rxstatus >> 16;
+ pktlength = rxstatus & 0xffff;
+
+ if ((pktstatus & 0xFF) || (pktlength == 0))
+ netdev_err(priv->dev,
+ "RCV pktstatus %08X pktlength %08X\n",
+ pktstatus, pktlength);
+
+ count++;
+ next_entry = (++priv->rx_cons) % priv->rx_ring_size;
+
+ skb = priv->rx_ring[entry].skb;
+ if (unlikely(!skb)) {
+ netdev_err(priv->dev,
+ "%s: Inconsistent Rx descriptor chain\n",
+ __func__);
+ priv->dev->stats.rx_dropped++;
+ break;
+ }
+ priv->rx_ring[entry].skb = NULL;
+
+ skb_put(skb, pktlength);
+
+ /* make cache consistent with receive packet buffer */
+ dma_sync_single_for_cpu(priv->device,
+ priv->rx_ring[entry].dma_addr,
+ priv->rx_ring[entry].len,
+ DMA_FROM_DEVICE);
+
+ dma_unmap_single(priv->device, priv->rx_ring[entry].dma_addr,
+ priv->rx_ring[entry].len, DMA_FROM_DEVICE);
+
+ if (netif_msg_pktdata(priv)) {
+ netdev_info(priv->dev, "frame received %d bytes\n",
+ pktlength);
+ print_hex_dump(KERN_ERR, "data: ", DUMP_PREFIX_OFFSET,
+ 16, 1, skb->data, pktlength, true);
+ }
+
+ tse_rx_vlan(priv->dev, skb);
+
+ skb->protocol = eth_type_trans(skb, priv->dev);
+ skb_checksum_none_assert(skb);
+
+ napi_gro_receive(&priv->napi, skb);
+
+ priv->dev->stats.rx_packets++;
+ priv->dev->stats.rx_bytes += pktlength;
+
+ entry = next_entry;
+ }
+
+ tse_rx_refill(priv);
+ return count;
+}
+
+/* Reclaim resources after transmission completes
+ */
+static int tse_tx_complete(struct altera_tse_private *priv)
+{
+ unsigned int txsize = priv->tx_ring_size;
+ u32 ready;
+ unsigned int entry;
+ struct tse_buffer *tx_buff;
+ int txcomplete = 0;
+
+ spin_lock(&priv->tx_lock);
+
+ ready = priv->dmaops->tx_completions(priv);
+
+ /* Free sent buffers */
+ while (ready && (priv->tx_cons != priv->tx_prod)) {
+ entry = priv->tx_cons % txsize;
+ tx_buff = &priv->tx_ring[entry];
+
+ if (netif_msg_tx_done(priv))
+ netdev_dbg(priv->dev, "%s: curr %d, dirty %d\n",
+ __func__, priv->tx_prod, priv->tx_cons);
+
+ if (likely(tx_buff->skb))
+ priv->dev->stats.tx_packets++;
+
+ tse_free_tx_buffer(priv, tx_buff);
+ priv->tx_cons++;
+
+ txcomplete++;
+ ready--;
+ }
+
+ if (unlikely(netif_queue_stopped(priv->dev) &&
+ tse_tx_avail(priv) > TSE_TX_THRESH(priv))) {
+ netif_tx_lock(priv->dev);
+ if (netif_queue_stopped(priv->dev) &&
+ tse_tx_avail(priv) > TSE_TX_THRESH(priv)) {
+ if (netif_msg_tx_done(priv))
+ netdev_dbg(priv->dev, "%s: restart transmit\n",
+ __func__);
+ netif_wake_queue(priv->dev);
+ }
+ netif_tx_unlock(priv->dev);
+ }
+
+ spin_unlock(&priv->tx_lock);
+ return txcomplete;
+}
+
+/* NAPI polling function
+ */
+static int tse_poll(struct napi_struct *napi, int budget)
+{
+ struct altera_tse_private *priv =
+ container_of(napi, struct altera_tse_private, napi);
+ int rxcomplete = 0;
+ int txcomplete = 0;
+ unsigned long int flags;
+
+ txcomplete = tse_tx_complete(priv);
+
+ rxcomplete = tse_rx(priv, budget);
+
+ if (rxcomplete >= budget || txcomplete > 0)
+ return rxcomplete;
+
+ napi_gro_flush(napi, false);
+ __napi_complete(napi);
+
+ netdev_dbg(priv->dev,
+ "NAPI Complete, did %d packets with budget %d\n",
+ txcomplete+rxcomplete, budget);
+
+ spin_lock_irqsave(&priv->rxdma_irq_lock, flags);
+ priv->dmaops->enable_rxirq(priv);
+ priv->dmaops->enable_txirq(priv);
+ spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags);
+ return rxcomplete + txcomplete;
+}
+
+/* DMA TX & RX FIFO interrupt routing
+ */
+static irqreturn_t altera_isr(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct altera_tse_private *priv;
+ unsigned long int flags;
+
+
+ if (unlikely(!dev)) {
+ pr_err("%s: invalid dev pointer\n", __func__);
+ return IRQ_NONE;
+ }
+ priv = netdev_priv(dev);
+
+ /* turn off desc irqs and enable napi rx */
+ spin_lock_irqsave(&priv->rxdma_irq_lock, flags);
+
+ if (likely(napi_schedule_prep(&priv->napi))) {
+ priv->dmaops->disable_rxirq(priv);
+ priv->dmaops->disable_txirq(priv);
+ __napi_schedule(&priv->napi);
+ }
+
+ /* reset IRQs */
+ priv->dmaops->clear_rxirq(priv);
+ priv->dmaops->clear_txirq(priv);
+
+ spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags);
+
+ return IRQ_HANDLED;
+}
+
+/* Transmit a packet (called by the kernel). Dispatches
+ * either the SGDMA method for transmitting or the
+ * MSGDMA method, assumes no scatter/gather support,
+ * implying an assumption that there's only one
+ * physically contiguous fragment starting at
+ * skb->data, for length of skb_headlen(skb).
+ */
+static int tse_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ unsigned int txsize = priv->tx_ring_size;
+ unsigned int entry;
+ struct tse_buffer *buffer = NULL;
+ int nfrags = skb_shinfo(skb)->nr_frags;
+ unsigned int nopaged_len = skb_headlen(skb);
+ enum netdev_tx ret = NETDEV_TX_OK;
+ dma_addr_t dma_addr;
+ int txcomplete = 0;
+
+ spin_lock_bh(&priv->tx_lock);
+
+ if (unlikely(tse_tx_avail(priv) < nfrags + 1)) {
+ if (!netif_queue_stopped(dev)) {
+ netif_stop_queue(dev);
+ /* This is a hard error, log it. */
+ netdev_err(priv->dev,
+ "%s: Tx list full when queue awake\n",
+ __func__);
+ }
+ ret = NETDEV_TX_BUSY;
+ goto out;
+ }
+
+ /* Map the first skb fragment */
+ entry = priv->tx_prod % txsize;
+ buffer = &priv->tx_ring[entry];
+
+ dma_addr = dma_map_single(priv->device, skb->data, nopaged_len,
+ DMA_TO_DEVICE);
+ if (dma_mapping_error(priv->device, dma_addr)) {
+ netdev_err(priv->dev, "%s: DMA mapping error\n", __func__);
+ ret = NETDEV_TX_OK;
+ goto out;
+ }
+
+ buffer->skb = skb;
+ buffer->dma_addr = dma_addr;
+ buffer->len = nopaged_len;
+
+ /* Push data out of the cache hierarchy into main memory */
+ dma_sync_single_for_device(priv->device, buffer->dma_addr,
+ buffer->len, DMA_TO_DEVICE);
+
+ txcomplete = priv->dmaops->tx_buffer(priv, buffer);
+
+ priv->tx_prod++;
+ dev->stats.tx_bytes += skb->len;
+
+ if (unlikely(tse_tx_avail(priv) <= TXQUEUESTOP_THRESHHOLD)) {
+ if (netif_msg_hw(priv))
+ netdev_dbg(priv->dev, "%s: stop transmitted packets\n",
+ __func__);
+ netif_stop_queue(dev);
+ }
+
+out:
+ spin_unlock_bh(&priv->tx_lock);
+
+ return ret;
+}
+
+/* Called every time the controller might need to be made
+ * aware of new link state. The PHY code conveys this
+ * information through variables in the phydev structure, and this
+ * function converts those variables into the appropriate
+ * register values, and can bring down the device if needed.
+ */
+static void altera_tse_adjust_link(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ struct phy_device *phydev = priv->phydev;
+ int new_state = 0;
+
+ /* only change config if there is a link */
+ spin_lock(&priv->mac_cfg_lock);
+ if (phydev->link) {
+ /* Read old config */
+ u32 cfg_reg = ioread32(&priv->mac_dev->command_config);
+
+ /* Check duplex */
+ if (phydev->duplex != priv->oldduplex) {
+ new_state = 1;
+ if (!(phydev->duplex))
+ cfg_reg |= MAC_CMDCFG_HD_ENA;
+ else
+ cfg_reg &= ~MAC_CMDCFG_HD_ENA;
+
+ netdev_dbg(priv->dev, "%s: Link duplex = 0x%x\n",
+ dev->name, phydev->duplex);
+
+ priv->oldduplex = phydev->duplex;
+ }
+
+ /* Check speed */
+ if (phydev->speed != priv->oldspeed) {
+ new_state = 1;
+ switch (phydev->speed) {
+ case 1000:
+ cfg_reg |= MAC_CMDCFG_ETH_SPEED;
+ cfg_reg &= ~MAC_CMDCFG_ENA_10;
+ break;
+ case 100:
+ cfg_reg &= ~MAC_CMDCFG_ETH_SPEED;
+ cfg_reg &= ~MAC_CMDCFG_ENA_10;
+ break;
+ case 10:
+ cfg_reg &= ~MAC_CMDCFG_ETH_SPEED;
+ cfg_reg |= MAC_CMDCFG_ENA_10;
+ break;
+ default:
+ if (netif_msg_link(priv))
+ netdev_warn(dev, "Speed (%d) is not 10/100/1000!\n",
+ phydev->speed);
+ break;
+ }
+ priv->oldspeed = phydev->speed;
+ }
+ iowrite32(cfg_reg, &priv->mac_dev->command_config);
+
+ if (!priv->oldlink) {
+ new_state = 1;
+ priv->oldlink = 1;
+ }
+ } else if (priv->oldlink) {
+ new_state = 1;
+ priv->oldlink = 0;
+ priv->oldspeed = 0;
+ priv->oldduplex = -1;
+ }
+
+ if (new_state && netif_msg_link(priv))
+ phy_print_status(phydev);
+
+ spin_unlock(&priv->mac_cfg_lock);
+}
+static struct phy_device *connect_local_phy(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ struct phy_device *phydev = NULL;
+ char phy_id_fmt[MII_BUS_ID_SIZE + 3];
+ int ret;
+
+ if (priv->phy_addr != POLL_PHY) {
+ snprintf(phy_id_fmt, MII_BUS_ID_SIZE + 3, PHY_ID_FMT,
+ priv->mdio->id, priv->phy_addr);
+
+ netdev_dbg(dev, "trying to attach to %s\n", phy_id_fmt);
+
+ phydev = phy_connect(dev, phy_id_fmt, &altera_tse_adjust_link,
+ priv->phy_iface);
+ if (IS_ERR(phydev))
+ netdev_err(dev, "Could not attach to PHY\n");
+
+ } else {
+ phydev = phy_find_first(priv->mdio);
+ if (phydev == NULL) {
+ netdev_err(dev, "No PHY found\n");
+ return phydev;
+ }
+
+ ret = phy_connect_direct(dev, phydev, &altera_tse_adjust_link,
+ priv->phy_iface);
+ if (ret != 0) {
+ netdev_err(dev, "Could not attach to PHY\n");
+ phydev = NULL;
+ }
+ }
+ return phydev;
+}
+
+/* Initialize driver's PHY state, and attach to the PHY
+ */
+static int init_phy(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ struct phy_device *phydev;
+ struct device_node *phynode;
+
+ priv->oldlink = 0;
+ priv->oldspeed = 0;
+ priv->oldduplex = -1;
+
+ phynode = of_parse_phandle(priv->device->of_node, "phy-handle", 0);
+
+ if (!phynode) {
+ netdev_dbg(dev, "no phy-handle found\n");
+ if (!priv->mdio) {
+ netdev_err(dev,
+ "No phy-handle nor local mdio specified\n");
+ return -ENODEV;
+ }
+ phydev = connect_local_phy(dev);
+ } else {
+ netdev_dbg(dev, "phy-handle found\n");
+ phydev = of_phy_connect(dev, phynode,
+ &altera_tse_adjust_link, 0, priv->phy_iface);
+ }
+
+ if (!phydev) {
+ netdev_err(dev, "Could not find the PHY\n");
+ return -ENODEV;
+ }
+
+ /* Stop Advertising 1000BASE Capability if interface is not GMII
+ * Note: Checkpatch throws CHECKs for the camel case defines below,
+ * it's ok to ignore.
+ */
+ if ((priv->phy_iface == PHY_INTERFACE_MODE_MII) ||
+ (priv->phy_iface == PHY_INTERFACE_MODE_RMII))
+ phydev->advertising &= ~(SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full);
+
+ /* Broken HW is sometimes missing the pull-up resistor on the
+ * MDIO line, which results in reads to non-existent devices returning
+ * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent
+ * device as well.
+ * Note: phydev->phy_id is the result of reading the UID PHY registers.
+ */
+ if (phydev->phy_id == 0) {
+ netdev_err(dev, "Bad PHY UID 0x%08x\n", phydev->phy_id);
+ phy_disconnect(phydev);
+ return -ENODEV;
+ }
+
+ netdev_dbg(dev, "attached to PHY %d UID 0x%08x Link = %d\n",
+ phydev->addr, phydev->phy_id, phydev->link);
+
+ priv->phydev = phydev;
+ return 0;
+}
+
+static void tse_update_mac_addr(struct altera_tse_private *priv, u8 *addr)
+{
+ struct altera_tse_mac *mac = priv->mac_dev;
+ u32 msb;
+ u32 lsb;
+
+ msb = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0];
+ lsb = ((addr[5] << 8) | addr[4]) & 0xffff;
+
+ /* Set primary MAC address */
+ iowrite32(msb, &mac->mac_addr_0);
+ iowrite32(lsb, &mac->mac_addr_1);
+}
+
+/* MAC software reset.
+ * When reset is triggered, the MAC function completes the current
+ * transmission or reception, and subsequently disables the transmit and
+ * receive logic, flushes the receive FIFO buffer, and resets the statistics
+ * counters.
+ */
+static int reset_mac(struct altera_tse_private *priv)
+{
+ void __iomem *cmd_cfg_reg = &priv->mac_dev->command_config;
+ int counter;
+ u32 dat;
+
+ dat = ioread32(cmd_cfg_reg);
+ dat &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA);
+ dat |= MAC_CMDCFG_SW_RESET | MAC_CMDCFG_CNT_RESET;
+ iowrite32(dat, cmd_cfg_reg);
+
+ counter = 0;
+ while (counter++ < ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) {
+ if (tse_bit_is_clear(cmd_cfg_reg, MAC_CMDCFG_SW_RESET))
+ break;
+ udelay(1);
+ }
+
+ if (counter >= ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) {
+ dat = ioread32(cmd_cfg_reg);
+ dat &= ~MAC_CMDCFG_SW_RESET;
+ iowrite32(dat, cmd_cfg_reg);
+ return -1;
+ }
+ return 0;
+}
+
+/* Initialize MAC core registers
+*/
+static int init_mac(struct altera_tse_private *priv)
+{
+ struct altera_tse_mac *mac = priv->mac_dev;
+ unsigned int cmd = 0;
+ u32 frm_length;
+
+ /* Setup Rx FIFO */
+ iowrite32(priv->rx_fifo_depth - ALTERA_TSE_RX_SECTION_EMPTY,
+ &mac->rx_section_empty);
+ iowrite32(ALTERA_TSE_RX_SECTION_FULL, &mac->rx_section_full);
+ iowrite32(ALTERA_TSE_RX_ALMOST_EMPTY, &mac->rx_almost_empty);
+ iowrite32(ALTERA_TSE_RX_ALMOST_FULL, &mac->rx_almost_full);
+
+ /* Setup Tx FIFO */
+ iowrite32(priv->tx_fifo_depth - ALTERA_TSE_TX_SECTION_EMPTY,
+ &mac->tx_section_empty);
+ iowrite32(ALTERA_TSE_TX_SECTION_FULL, &mac->tx_section_full);
+ iowrite32(ALTERA_TSE_TX_ALMOST_EMPTY, &mac->tx_almost_empty);
+ iowrite32(ALTERA_TSE_TX_ALMOST_FULL, &mac->tx_almost_full);
+
+ /* MAC Address Configuration */
+ tse_update_mac_addr(priv, priv->dev->dev_addr);
+
+ /* MAC Function Configuration */
+ frm_length = ETH_HLEN + priv->dev->mtu + ETH_FCS_LEN;
+ iowrite32(frm_length, &mac->frm_length);
+ iowrite32(ALTERA_TSE_TX_IPG_LENGTH, &mac->tx_ipg_length);
+
+ /* Disable RX/TX shift 16 for alignment of all received frames on 16-bit
+ * start address
+ */
+ tse_clear_bit(&mac->rx_cmd_stat, ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16);
+ tse_clear_bit(&mac->tx_cmd_stat, ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16 |
+ ALTERA_TSE_TX_CMD_STAT_OMIT_CRC);
+
+ /* Set the MAC options */
+ cmd = ioread32(&mac->command_config);
+ cmd |= MAC_CMDCFG_PAD_EN; /* Padding Removal on Receive */
+ cmd &= ~MAC_CMDCFG_CRC_FWD; /* CRC Removal */
+ cmd |= MAC_CMDCFG_RX_ERR_DISC; /* Automatically discard frames
+ * with CRC errors
+ */
+ cmd |= MAC_CMDCFG_CNTL_FRM_ENA;
+ cmd &= ~MAC_CMDCFG_TX_ENA;
+ cmd &= ~MAC_CMDCFG_RX_ENA;
+ iowrite32(cmd, &mac->command_config);
+
+ if (netif_msg_hw(priv))
+ dev_dbg(priv->device,
+ "MAC post-initialization: CMD_CONFIG = 0x%08x\n", cmd);
+
+ return 0;
+}
+
+/* Start/stop MAC transmission logic
+ */
+static void tse_set_mac(struct altera_tse_private *priv, bool enable)
+{
+ struct altera_tse_mac *mac = priv->mac_dev;
+ u32 value = ioread32(&mac->command_config);
+
+ if (enable)
+ value |= MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA;
+ else
+ value &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA);
+
+ iowrite32(value, &mac->command_config);
+}
+
+/* Change the MTU
+ */
+static int tse_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ unsigned int max_mtu = priv->max_mtu;
+ unsigned int min_mtu = ETH_ZLEN + ETH_FCS_LEN;
+
+ if (netif_running(dev)) {
+ netdev_err(dev, "must be stopped to change its MTU\n");
+ return -EBUSY;
+ }
+
+ if ((new_mtu < min_mtu) || (new_mtu > max_mtu)) {
+ netdev_err(dev, "invalid MTU, max MTU is: %u\n", max_mtu);
+ return -EINVAL;
+ }
+
+ dev->mtu = new_mtu;
+ netdev_update_features(dev);
+
+ return 0;
+}
+
+static void altera_tse_set_mcfilter(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ struct altera_tse_mac *mac = (struct altera_tse_mac *)priv->mac_dev;
+ int i;
+ struct netdev_hw_addr *ha;
+
+ /* clear the hash filter */
+ for (i = 0; i < 64; i++)
+ iowrite32(0, &(mac->hash_table[i]));
+
+ netdev_for_each_mc_addr(ha, dev) {
+ unsigned int hash = 0;
+ int mac_octet;
+
+ for (mac_octet = 5; mac_octet >= 0; mac_octet--) {
+ unsigned char xor_bit = 0;
+ unsigned char octet = ha->addr[mac_octet];
+ unsigned int bitshift;
+
+ for (bitshift = 0; bitshift < 8; bitshift++)
+ xor_bit ^= ((octet >> bitshift) & 0x01);
+
+ hash = (hash << 1) | xor_bit;
+ }
+ iowrite32(1, &(mac->hash_table[hash]));
+ }
+}
+
+
+static void altera_tse_set_mcfilterall(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ struct altera_tse_mac *mac = (struct altera_tse_mac *)priv->mac_dev;
+ int i;
+
+ /* set the hash filter */
+ for (i = 0; i < 64; i++)
+ iowrite32(1, &(mac->hash_table[i]));
+}
+
+/* Set or clear the multicast filter for this adaptor
+ */
+static void tse_set_rx_mode_hashfilter(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ struct altera_tse_mac *mac = priv->mac_dev;
+
+ spin_lock(&priv->mac_cfg_lock);
+
+ if (dev->flags & IFF_PROMISC)
+ tse_set_bit(&mac->command_config, MAC_CMDCFG_PROMIS_EN);
+
+ if (dev->flags & IFF_ALLMULTI)
+ altera_tse_set_mcfilterall(dev);
+ else
+ altera_tse_set_mcfilter(dev);
+
+ spin_unlock(&priv->mac_cfg_lock);
+}
+
+/* Set or clear the multicast filter for this adaptor
+ */
+static void tse_set_rx_mode(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ struct altera_tse_mac *mac = priv->mac_dev;
+
+ spin_lock(&priv->mac_cfg_lock);
+
+ if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
+ !netdev_mc_empty(dev) || !netdev_uc_empty(dev))
+ tse_set_bit(&mac->command_config, MAC_CMDCFG_PROMIS_EN);
+ else
+ tse_clear_bit(&mac->command_config, MAC_CMDCFG_PROMIS_EN);
+
+ spin_unlock(&priv->mac_cfg_lock);
+}
+
+/* Open and initialize the interface
+ */
+static int tse_open(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ int ret = 0;
+ int i;
+ unsigned long int flags;
+
+ /* Reset and configure TSE MAC and probe associated PHY */
+ ret = priv->dmaops->init_dma(priv);
+ if (ret != 0) {
+ netdev_err(dev, "Cannot initialize DMA\n");
+ goto phy_error;
+ }
+
+ if (netif_msg_ifup(priv))
+ netdev_warn(dev, "device MAC address %pM\n",
+ dev->dev_addr);
+
+ if ((priv->revision < 0xd00) || (priv->revision > 0xe00))
+ netdev_warn(dev, "TSE revision %x\n", priv->revision);
+
+ spin_lock(&priv->mac_cfg_lock);
+ ret = reset_mac(priv);
+ if (ret)
+ netdev_err(dev, "Cannot reset MAC core (error: %d)\n", ret);
+
+ ret = init_mac(priv);
+ spin_unlock(&priv->mac_cfg_lock);
+ if (ret) {
+ netdev_err(dev, "Cannot init MAC core (error: %d)\n", ret);
+ goto alloc_skbuf_error;
+ }
+
+ priv->dmaops->reset_dma(priv);
+
+ /* Create and initialize the TX/RX descriptors chains. */
+ priv->rx_ring_size = dma_rx_num;
+ priv->tx_ring_size = dma_tx_num;
+ ret = alloc_init_skbufs(priv);
+ if (ret) {
+ netdev_err(dev, "DMA descriptors initialization failed\n");
+ goto alloc_skbuf_error;
+ }
+
+
+ /* Register RX interrupt */
+ ret = request_irq(priv->rx_irq, altera_isr, IRQF_SHARED,
+ dev->name, dev);
+ if (ret) {
+ netdev_err(dev, "Unable to register RX interrupt %d\n",
+ priv->rx_irq);
+ goto init_error;
+ }
+
+ /* Register TX interrupt */
+ ret = request_irq(priv->tx_irq, altera_isr, IRQF_SHARED,
+ dev->name, dev);
+ if (ret) {
+ netdev_err(dev, "Unable to register TX interrupt %d\n",
+ priv->tx_irq);
+ goto tx_request_irq_error;
+ }
+
+ /* Enable DMA interrupts */
+ spin_lock_irqsave(&priv->rxdma_irq_lock, flags);
+ priv->dmaops->enable_rxirq(priv);
+ priv->dmaops->enable_txirq(priv);
+
+ /* Setup RX descriptor chain */
+ for (i = 0; i < priv->rx_ring_size; i++)
+ priv->dmaops->add_rx_desc(priv, &priv->rx_ring[i]);
+
+ spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags);
+
+ /* Start MAC Rx/Tx */
+ spin_lock(&priv->mac_cfg_lock);
+ tse_set_mac(priv, true);
+ spin_unlock(&priv->mac_cfg_lock);
+
+ if (priv->phydev)
+ phy_start(priv->phydev);
+
+ napi_enable(&priv->napi);
+ netif_start_queue(dev);
+
+ return 0;
+
+tx_request_irq_error:
+ free_irq(priv->rx_irq, dev);
+init_error:
+ free_skbufs(dev);
+alloc_skbuf_error:
+ if (priv->phydev) {
+ phy_disconnect(priv->phydev);
+ priv->phydev = NULL;
+ }
+phy_error:
+ return ret;
+}
+
+/* Stop TSE MAC interface and put the device in an inactive state
+ */
+static int tse_shutdown(struct net_device *dev)
+{
+ struct altera_tse_private *priv = netdev_priv(dev);
+ int ret;
+ unsigned long int flags;
+
+ /* Stop and disconnect the PHY */
+ if (priv->phydev) {
+ phy_stop(priv->phydev);
+ phy_disconnect(priv->phydev);
+ priv->phydev = NULL;
+ }
+
+ netif_stop_queue(dev);
+ napi_disable(&priv->napi);
+
+ /* Disable DMA interrupts */
+ spin_lock_irqsave(&priv->rxdma_irq_lock, flags);
+ priv->dmaops->disable_rxirq(priv);
+ priv->dmaops->disable_txirq(priv);
+ spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags);
+
+ /* Free the IRQ lines */
+ free_irq(priv->rx_irq, dev);
+ free_irq(priv->tx_irq, dev);
+
+ /* disable and reset the MAC, empties fifo */
+ spin_lock(&priv->mac_cfg_lock);
+ spin_lock(&priv->tx_lock);
+
+ ret = reset_mac(priv);
+ if (ret)
+ netdev_err(dev, "Cannot reset MAC core (error: %d)\n", ret);
+ priv->dmaops->reset_dma(priv);
+ free_skbufs(dev);
+
+ spin_unlock(&priv->tx_lock);
+ spin_unlock(&priv->mac_cfg_lock);
+
+ priv->dmaops->uninit_dma(priv);
+
+ return 0;
+}
+
+static struct net_device_ops altera_tse_netdev_ops = {
+ .ndo_open = tse_open,
+ .ndo_stop = tse_shutdown,
+ .ndo_start_xmit = tse_start_xmit,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_set_rx_mode = tse_set_rx_mode,
+ .ndo_change_mtu = tse_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+};
+
+
+static int request_and_map(struct platform_device *pdev, const char *name,
+ struct resource **res, void __iomem **ptr)
+{
+ struct resource *region;
+ struct device *device = &pdev->dev;
+
+ *res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
+ if (*res == NULL) {
+ dev_err(device, "resource %s not defined\n", name);
+ return -ENODEV;
+ }
+
+ region = devm_request_mem_region(device, (*res)->start,
+ resource_size(*res), dev_name(device));
+ if (region == NULL) {
+ dev_err(device, "unable to request %s\n", name);
+ return -EBUSY;
+ }
+
+ *ptr = devm_ioremap_nocache(device, region->start,
+ resource_size(region));
+ if (*ptr == NULL) {
+ dev_err(device, "ioremap_nocache of %s failed!", name);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+/* Probe Altera TSE MAC device
+ */
+static int altera_tse_probe(struct platform_device *pdev)
+{
+ struct net_device *ndev;
+ int ret = -ENODEV;
+ struct resource *control_port;
+ struct resource *dma_res;
+ struct altera_tse_private *priv;
+ const unsigned char *macaddr;
+ struct device_node *np = pdev->dev.of_node;
+ unsigned int descmap;
+ const struct of_device_id *of_id = NULL;
+
+ ndev = alloc_etherdev(sizeof(struct altera_tse_private));
+ if (!ndev) {
+ dev_err(&pdev->dev, "Could not allocate network device\n");
+ return -ENODEV;
+ }
+
+ SET_NETDEV_DEV(ndev, &pdev->dev);
+
+ priv = netdev_priv(ndev);
+ priv->device = &pdev->dev;
+ priv->dev = ndev;
+ priv->msg_enable = netif_msg_init(debug, default_msg_level);
+
+ of_id = of_match_device(altera_tse_ids, &pdev->dev);
+
+ if (of_id)
+ priv->dmaops = (struct altera_dmaops *)of_id->data;
+
+
+ if (priv->dmaops &&
+ priv->dmaops->altera_dtype == ALTERA_DTYPE_SGDMA) {
+ ret = request_and_map(pdev, "s1", &dma_res,
+ (void *)&descmap);
+ if (ret)
+ goto out_free;
+
+ priv->tx_dma_desc = (void *)descmap;
+ priv->txdescmem = resource_size(dma_res)/2;
+ priv->txdescmem_busaddr = dma_res->start;
+
+ priv->rx_dma_desc = (void *)(descmap+priv->txdescmem);
+ priv->rxdescmem = resource_size(dma_res)/2;
+ priv->rxdescmem_busaddr = dma_res->start + priv->txdescmem;
+
+ if (upper_32_bits(priv->rxdescmem_busaddr)) {
+ dev_dbg(priv->device,
+ "SGDMA bus addresses greater than 32-bits\n");
+ goto out_free;
+ }
+ if (upper_32_bits(priv->txdescmem_busaddr)) {
+ dev_dbg(priv->device,
+ "SGDMA bus addresses greater than 32-bits\n");
+ goto out_free;
+ }
+ } else if (priv->dmaops &&
+ priv->dmaops->altera_dtype == ALTERA_DTYPE_MSGDMA) {
+ ret = request_and_map(pdev, "rx_resp", &dma_res,
+ (void *)&priv->rx_dma_resp);
+ if (ret)
+ goto out_free;
+
+ ret = request_and_map(pdev, "tx_desc", &dma_res,
+ (void *)&priv->tx_dma_desc);
+ if (ret)
+ goto out_free;
+
+ priv->txdescmem = resource_size(dma_res);
+ priv->txdescmem_busaddr = dma_res->start;
+
+ ret = request_and_map(pdev, "rx_desc", &dma_res,
+ (void *)&priv->rx_dma_desc);
+ if (ret)
+ goto out_free;
+
+ priv->rxdescmem = resource_size(dma_res);
+ priv->rxdescmem_busaddr = dma_res->start;
+
+ } else {
+ goto out_free;
+ }
+
+ if (!dma_set_mask(priv->device, DMA_BIT_MASK(priv->dmaops->dmamask)))
+ dma_set_coherent_mask(priv->device,
+ DMA_BIT_MASK(priv->dmaops->dmamask));
+ else if (!dma_set_mask(priv->device, DMA_BIT_MASK(32)))
+ dma_set_coherent_mask(priv->device, DMA_BIT_MASK(32));
+ else
+ goto out_free;
+
+ /* MAC address space */
+ ret = request_and_map(pdev, "control_port", &control_port,
+ (void *)&priv->mac_dev);
+ if (ret)
+ goto out_free;
+
+ /* xSGDMA Rx Dispatcher address space */
+ ret = request_and_map(pdev, "rx_csr", &dma_res,
+ (void *)&priv->rx_dma_csr);
+ if (ret)
+ goto out_free;
+
+
+ /* xSGDMA Tx Dispatcher address space */
+ ret = request_and_map(pdev, "tx_csr", &dma_res,
+ (void *)&priv->tx_dma_csr);
+ if (ret)
+ goto out_free;
+
+
+ /* Rx IRQ */
+ priv->rx_irq = platform_get_irq_byname(pdev, "rx_irq");
+ if (priv->rx_irq == -ENXIO) {
+ dev_err(&pdev->dev, "cannot obtain Rx IRQ\n");
+ ret = -ENXIO;
+ goto out_free;
+ }
+
+ /* Tx IRQ */
+ priv->tx_irq = platform_get_irq_byname(pdev, "tx_irq");
+ if (priv->tx_irq == -ENXIO) {
+ dev_err(&pdev->dev, "cannot obtain Tx IRQ\n");
+ ret = -ENXIO;
+ goto out_free;
+ }
+
+ /* get FIFO depths from device tree */
+ if (of_property_read_u32(pdev->dev.of_node, "rx-fifo-depth",
+ &priv->rx_fifo_depth)) {
+ dev_err(&pdev->dev, "cannot obtain rx-fifo-depth\n");
+ ret = -ENXIO;
+ goto out_free;
+ }
+
+ if (of_property_read_u32(pdev->dev.of_node, "tx-fifo-depth",
+ &priv->rx_fifo_depth)) {
+ dev_err(&pdev->dev, "cannot obtain tx-fifo-depth\n");
+ ret = -ENXIO;
+ goto out_free;
+ }
+
+ /* get hash filter settings for this instance */
+ priv->hash_filter =
+ of_property_read_bool(pdev->dev.of_node,
+ "altr,has-hash-multicast-filter");
+
+ /* get supplemental address settings for this instance */
+ priv->added_unicast =
+ of_property_read_bool(pdev->dev.of_node,
+ "altr,has-supplementary-unicast");
+
+ /* Max MTU is 1500, ETH_DATA_LEN */
+ priv->max_mtu = ETH_DATA_LEN;
+
+ /* Get the max mtu from the device tree. Note that the
+ * "max-frame-size" parameter is actually max mtu. Definition
+ * in the ePAPR v1.1 spec and usage differ, so go with usage.
+ */
+ of_property_read_u32(pdev->dev.of_node, "max-frame-size",
+ &priv->max_mtu);
+
+ /* The DMA buffer size already accounts for an alignment bias
+ * to avoid unaligned access exceptions for the NIOS processor,
+ */
+ priv->rx_dma_buf_sz = ALTERA_RXDMABUFFER_SIZE;
+
+ /* get default MAC address from device tree */
+ macaddr = of_get_mac_address(pdev->dev.of_node);
+ if (macaddr)
+ ether_addr_copy(ndev->dev_addr, macaddr);
+ else
+ eth_hw_addr_random(ndev);
+
+ priv->phy_iface = of_get_phy_mode(np);
+
+ /* try to get PHY address from device tree, use PHY autodetection if
+ * no valid address is given
+ */
+ if (of_property_read_u32(pdev->dev.of_node, "phy-addr",
+ &priv->phy_addr)) {
+ priv->phy_addr = POLL_PHY;
+ }
+
+ if (!((priv->phy_addr == POLL_PHY) ||
+ ((priv->phy_addr >= 0) && (priv->phy_addr < PHY_MAX_ADDR)))) {
+ dev_err(&pdev->dev, "invalid phy-addr specified %d\n",
+ priv->phy_addr);
+ goto out_free;
+ }
+
+ /* Create/attach to MDIO bus */
+ ret = altera_tse_mdio_create(ndev,
+ atomic_add_return(1, &instance_count));
+
+ if (ret)
+ goto out_free;
+
+ /* initialize netdev */
+ ether_setup(ndev);
+ ndev->mem_start = control_port->start;
+ ndev->mem_end = control_port->end;
+ ndev->netdev_ops = &altera_tse_netdev_ops;
+ altera_tse_set_ethtool_ops(ndev);
+
+ altera_tse_netdev_ops.ndo_set_rx_mode = tse_set_rx_mode;
+
+ if (priv->hash_filter)
+ altera_tse_netdev_ops.ndo_set_rx_mode =
+ tse_set_rx_mode_hashfilter;
+
+ /* Scatter/gather IO is not supported,
+ * so it is turned off
+ */
+ ndev->hw_features &= ~NETIF_F_SG;
+ ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA;
+
+ /* VLAN offloading of tagging, stripping and filtering is not
+ * supported by hardware, but driver will accommodate the
+ * extra 4-byte VLAN tag for processing by upper layers
+ */
+ ndev->features |= NETIF_F_HW_VLAN_CTAG_RX;
+
+ /* setup NAPI interface */
+ netif_napi_add(ndev, &priv->napi, tse_poll, NAPI_POLL_WEIGHT);
+
+ spin_lock_init(&priv->mac_cfg_lock);
+ spin_lock_init(&priv->tx_lock);
+ spin_lock_init(&priv->rxdma_irq_lock);
+
+ ret = register_netdev(ndev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register TSE net device\n");
+ goto out_free_mdio;
+ }
+
+ platform_set_drvdata(pdev, ndev);
+
+ priv->revision = ioread32(&priv->mac_dev->megacore_revision);
+
+ if (netif_msg_probe(priv))
+ dev_info(&pdev->dev, "Altera TSE MAC version %d.%d at 0x%08lx irq %d/%d\n",
+ (priv->revision >> 8) & 0xff,
+ priv->revision & 0xff,
+ (unsigned long) control_port->start, priv->rx_irq,
+ priv->tx_irq);
+
+ ret = init_phy(ndev);
+ if (ret != 0) {
+ netdev_err(ndev, "Cannot attach to PHY (error: %d)\n", ret);
+ goto out_free_mdio;
+ }
+ return 0;
+
+out_free_mdio:
+ altera_tse_mdio_destroy(ndev);
+out_free:
+ free_netdev(ndev);
+ return ret;
+}
+
+/* Remove Altera TSE MAC device
+ */
+static int altera_tse_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+
+ platform_set_drvdata(pdev, NULL);
+ altera_tse_mdio_destroy(ndev);
+ unregister_netdev(ndev);
+ free_netdev(ndev);
+
+ return 0;
+}
+
+struct altera_dmaops altera_dtype_sgdma = {
+ .altera_dtype = ALTERA_DTYPE_SGDMA,
+ .dmamask = 32,
+ .reset_dma = sgdma_reset,
+ .enable_txirq = sgdma_enable_txirq,
+ .enable_rxirq = sgdma_enable_rxirq,
+ .disable_txirq = sgdma_disable_txirq,
+ .disable_rxirq = sgdma_disable_rxirq,
+ .clear_txirq = sgdma_clear_txirq,
+ .clear_rxirq = sgdma_clear_rxirq,
+ .tx_buffer = sgdma_tx_buffer,
+ .tx_completions = sgdma_tx_completions,
+ .add_rx_desc = sgdma_add_rx_desc,
+ .get_rx_status = sgdma_rx_status,
+ .init_dma = sgdma_initialize,
+ .uninit_dma = sgdma_uninitialize,
+};
+
+struct altera_dmaops altera_dtype_msgdma = {
+ .altera_dtype = ALTERA_DTYPE_MSGDMA,
+ .dmamask = 64,
+ .reset_dma = msgdma_reset,
+ .enable_txirq = msgdma_enable_txirq,
+ .enable_rxirq = msgdma_enable_rxirq,
+ .disable_txirq = msgdma_disable_txirq,
+ .disable_rxirq = msgdma_disable_rxirq,
+ .clear_txirq = msgdma_clear_txirq,
+ .clear_rxirq = msgdma_clear_rxirq,
+ .tx_buffer = msgdma_tx_buffer,
+ .tx_completions = msgdma_tx_completions,
+ .add_rx_desc = msgdma_add_rx_desc,
+ .get_rx_status = msgdma_rx_status,
+ .init_dma = msgdma_initialize,
+ .uninit_dma = msgdma_uninitialize,
+};
+
+static struct of_device_id altera_tse_ids[] = {
+ { .compatible = "altr,tse-msgdma-1.0", .data = &altera_dtype_msgdma, },
+ { .compatible = "altr,tse-1.0", .data = &altera_dtype_sgdma, },
+ { .compatible = "ALTR,tse-1.0", .data = &altera_dtype_sgdma, },
+ {},
+};
+MODULE_DEVICE_TABLE(of, altera_tse_ids);
+
+static struct platform_driver altera_tse_driver = {
+ .probe = altera_tse_probe,
+ .remove = altera_tse_remove,
+ .suspend = NULL,
+ .resume = NULL,
+ .driver = {
+ .name = ALTERA_TSE_RESOURCE_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = altera_tse_ids,
+ },
+};
+
+module_platform_driver(altera_tse_driver);
+
+MODULE_AUTHOR("Altera Corporation");
+MODULE_DESCRIPTION("Altera Triple Speed Ethernet MAC driver");
+MODULE_LICENSE("GPL v2");
--
1.7.9.5
--
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