1605 lines
42 KiB
C
1605 lines
42 KiB
C
/*
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* drivers/net/ethernet/nxp/lpc_eth.c
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*
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* Author: Kevin Wells <kevin.wells@nxp.com>
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*
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* Copyright (C) 2010 NXP Semiconductors
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* Copyright (C) 2012 Roland Stigge <stigge@antcom.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/crc32.h>
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#include <linux/platform_device.h>
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#include <linux/spinlock.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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#include <linux/clk.h>
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#include <linux/workqueue.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/phy.h>
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#include <linux/dma-mapping.h>
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#include <linux/of_net.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/io.h>
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#include <mach/board.h>
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#include <mach/platform.h>
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#include <mach/hardware.h>
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#define MODNAME "lpc-eth"
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#define DRV_VERSION "1.00"
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#define PHYDEF_ADDR 0x00
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#define ENET_MAXF_SIZE 1536
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#define ENET_RX_DESC 48
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#define ENET_TX_DESC 16
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#define NAPI_WEIGHT 16
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/*
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* Ethernet MAC controller Register offsets
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*/
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#define LPC_ENET_MAC1(x) (x + 0x000)
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#define LPC_ENET_MAC2(x) (x + 0x004)
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#define LPC_ENET_IPGT(x) (x + 0x008)
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#define LPC_ENET_IPGR(x) (x + 0x00C)
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#define LPC_ENET_CLRT(x) (x + 0x010)
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#define LPC_ENET_MAXF(x) (x + 0x014)
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#define LPC_ENET_SUPP(x) (x + 0x018)
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#define LPC_ENET_TEST(x) (x + 0x01C)
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#define LPC_ENET_MCFG(x) (x + 0x020)
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#define LPC_ENET_MCMD(x) (x + 0x024)
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#define LPC_ENET_MADR(x) (x + 0x028)
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#define LPC_ENET_MWTD(x) (x + 0x02C)
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#define LPC_ENET_MRDD(x) (x + 0x030)
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#define LPC_ENET_MIND(x) (x + 0x034)
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#define LPC_ENET_SA0(x) (x + 0x040)
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#define LPC_ENET_SA1(x) (x + 0x044)
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#define LPC_ENET_SA2(x) (x + 0x048)
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#define LPC_ENET_COMMAND(x) (x + 0x100)
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#define LPC_ENET_STATUS(x) (x + 0x104)
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#define LPC_ENET_RXDESCRIPTOR(x) (x + 0x108)
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#define LPC_ENET_RXSTATUS(x) (x + 0x10C)
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#define LPC_ENET_RXDESCRIPTORNUMBER(x) (x + 0x110)
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#define LPC_ENET_RXPRODUCEINDEX(x) (x + 0x114)
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#define LPC_ENET_RXCONSUMEINDEX(x) (x + 0x118)
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#define LPC_ENET_TXDESCRIPTOR(x) (x + 0x11C)
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#define LPC_ENET_TXSTATUS(x) (x + 0x120)
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#define LPC_ENET_TXDESCRIPTORNUMBER(x) (x + 0x124)
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#define LPC_ENET_TXPRODUCEINDEX(x) (x + 0x128)
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#define LPC_ENET_TXCONSUMEINDEX(x) (x + 0x12C)
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#define LPC_ENET_TSV0(x) (x + 0x158)
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#define LPC_ENET_TSV1(x) (x + 0x15C)
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#define LPC_ENET_RSV(x) (x + 0x160)
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#define LPC_ENET_FLOWCONTROLCOUNTER(x) (x + 0x170)
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#define LPC_ENET_FLOWCONTROLSTATUS(x) (x + 0x174)
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#define LPC_ENET_RXFILTER_CTRL(x) (x + 0x200)
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#define LPC_ENET_RXFILTERWOLSTATUS(x) (x + 0x204)
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#define LPC_ENET_RXFILTERWOLCLEAR(x) (x + 0x208)
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#define LPC_ENET_HASHFILTERL(x) (x + 0x210)
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#define LPC_ENET_HASHFILTERH(x) (x + 0x214)
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#define LPC_ENET_INTSTATUS(x) (x + 0xFE0)
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#define LPC_ENET_INTENABLE(x) (x + 0xFE4)
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#define LPC_ENET_INTCLEAR(x) (x + 0xFE8)
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#define LPC_ENET_INTSET(x) (x + 0xFEC)
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#define LPC_ENET_POWERDOWN(x) (x + 0xFF4)
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/*
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* mac1 register definitions
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*/
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#define LPC_MAC1_RECV_ENABLE (1 << 0)
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#define LPC_MAC1_PASS_ALL_RX_FRAMES (1 << 1)
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#define LPC_MAC1_RX_FLOW_CONTROL (1 << 2)
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#define LPC_MAC1_TX_FLOW_CONTROL (1 << 3)
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#define LPC_MAC1_LOOPBACK (1 << 4)
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#define LPC_MAC1_RESET_TX (1 << 8)
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#define LPC_MAC1_RESET_MCS_TX (1 << 9)
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#define LPC_MAC1_RESET_RX (1 << 10)
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#define LPC_MAC1_RESET_MCS_RX (1 << 11)
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#define LPC_MAC1_SIMULATION_RESET (1 << 14)
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#define LPC_MAC1_SOFT_RESET (1 << 15)
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/*
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* mac2 register definitions
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*/
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#define LPC_MAC2_FULL_DUPLEX (1 << 0)
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#define LPC_MAC2_FRAME_LENGTH_CHECKING (1 << 1)
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#define LPC_MAC2_HUGH_LENGTH_CHECKING (1 << 2)
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#define LPC_MAC2_DELAYED_CRC (1 << 3)
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#define LPC_MAC2_CRC_ENABLE (1 << 4)
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#define LPC_MAC2_PAD_CRC_ENABLE (1 << 5)
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#define LPC_MAC2_VLAN_PAD_ENABLE (1 << 6)
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#define LPC_MAC2_AUTO_DETECT_PAD_ENABLE (1 << 7)
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#define LPC_MAC2_PURE_PREAMBLE_ENFORCEMENT (1 << 8)
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#define LPC_MAC2_LONG_PREAMBLE_ENFORCEMENT (1 << 9)
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#define LPC_MAC2_NO_BACKOFF (1 << 12)
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#define LPC_MAC2_BACK_PRESSURE (1 << 13)
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#define LPC_MAC2_EXCESS_DEFER (1 << 14)
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/*
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* ipgt register definitions
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*/
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#define LPC_IPGT_LOAD(n) ((n) & 0x7F)
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/*
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* ipgr register definitions
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*/
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#define LPC_IPGR_LOAD_PART2(n) ((n) & 0x7F)
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#define LPC_IPGR_LOAD_PART1(n) (((n) & 0x7F) << 8)
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/*
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* clrt register definitions
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*/
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#define LPC_CLRT_LOAD_RETRY_MAX(n) ((n) & 0xF)
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#define LPC_CLRT_LOAD_COLLISION_WINDOW(n) (((n) & 0x3F) << 8)
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/*
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* maxf register definitions
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*/
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#define LPC_MAXF_LOAD_MAX_FRAME_LEN(n) ((n) & 0xFFFF)
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/*
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* supp register definitions
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*/
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#define LPC_SUPP_SPEED (1 << 8)
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#define LPC_SUPP_RESET_RMII (1 << 11)
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/*
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* test register definitions
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*/
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#define LPC_TEST_SHORTCUT_PAUSE_QUANTA (1 << 0)
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#define LPC_TEST_PAUSE (1 << 1)
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#define LPC_TEST_BACKPRESSURE (1 << 2)
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/*
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* mcfg register definitions
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*/
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#define LPC_MCFG_SCAN_INCREMENT (1 << 0)
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#define LPC_MCFG_SUPPRESS_PREAMBLE (1 << 1)
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#define LPC_MCFG_CLOCK_SELECT(n) (((n) & 0x7) << 2)
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#define LPC_MCFG_CLOCK_HOST_DIV_4 0
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#define LPC_MCFG_CLOCK_HOST_DIV_6 2
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#define LPC_MCFG_CLOCK_HOST_DIV_8 3
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#define LPC_MCFG_CLOCK_HOST_DIV_10 4
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#define LPC_MCFG_CLOCK_HOST_DIV_14 5
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#define LPC_MCFG_CLOCK_HOST_DIV_20 6
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#define LPC_MCFG_CLOCK_HOST_DIV_28 7
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#define LPC_MCFG_RESET_MII_MGMT (1 << 15)
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/*
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* mcmd register definitions
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*/
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#define LPC_MCMD_READ (1 << 0)
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#define LPC_MCMD_SCAN (1 << 1)
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/*
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* madr register definitions
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*/
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#define LPC_MADR_REGISTER_ADDRESS(n) ((n) & 0x1F)
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#define LPC_MADR_PHY_0ADDRESS(n) (((n) & 0x1F) << 8)
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/*
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* mwtd register definitions
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*/
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#define LPC_MWDT_WRITE(n) ((n) & 0xFFFF)
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/*
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* mrdd register definitions
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*/
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#define LPC_MRDD_READ_MASK 0xFFFF
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/*
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* mind register definitions
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*/
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#define LPC_MIND_BUSY (1 << 0)
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#define LPC_MIND_SCANNING (1 << 1)
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#define LPC_MIND_NOT_VALID (1 << 2)
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#define LPC_MIND_MII_LINK_FAIL (1 << 3)
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/*
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* command register definitions
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*/
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#define LPC_COMMAND_RXENABLE (1 << 0)
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#define LPC_COMMAND_TXENABLE (1 << 1)
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#define LPC_COMMAND_REG_RESET (1 << 3)
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#define LPC_COMMAND_TXRESET (1 << 4)
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#define LPC_COMMAND_RXRESET (1 << 5)
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#define LPC_COMMAND_PASSRUNTFRAME (1 << 6)
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#define LPC_COMMAND_PASSRXFILTER (1 << 7)
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#define LPC_COMMAND_TXFLOWCONTROL (1 << 8)
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#define LPC_COMMAND_RMII (1 << 9)
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#define LPC_COMMAND_FULLDUPLEX (1 << 10)
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/*
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* status register definitions
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*/
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#define LPC_STATUS_RXACTIVE (1 << 0)
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#define LPC_STATUS_TXACTIVE (1 << 1)
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/*
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* tsv0 register definitions
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*/
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#define LPC_TSV0_CRC_ERROR (1 << 0)
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#define LPC_TSV0_LENGTH_CHECK_ERROR (1 << 1)
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#define LPC_TSV0_LENGTH_OUT_OF_RANGE (1 << 2)
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#define LPC_TSV0_DONE (1 << 3)
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#define LPC_TSV0_MULTICAST (1 << 4)
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#define LPC_TSV0_BROADCAST (1 << 5)
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#define LPC_TSV0_PACKET_DEFER (1 << 6)
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#define LPC_TSV0_ESCESSIVE_DEFER (1 << 7)
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#define LPC_TSV0_ESCESSIVE_COLLISION (1 << 8)
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#define LPC_TSV0_LATE_COLLISION (1 << 9)
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#define LPC_TSV0_GIANT (1 << 10)
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#define LPC_TSV0_UNDERRUN (1 << 11)
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#define LPC_TSV0_TOTAL_BYTES(n) (((n) >> 12) & 0xFFFF)
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#define LPC_TSV0_CONTROL_FRAME (1 << 28)
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#define LPC_TSV0_PAUSE (1 << 29)
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#define LPC_TSV0_BACKPRESSURE (1 << 30)
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#define LPC_TSV0_VLAN (1 << 31)
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/*
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* tsv1 register definitions
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*/
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#define LPC_TSV1_TRANSMIT_BYTE_COUNT(n) ((n) & 0xFFFF)
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#define LPC_TSV1_COLLISION_COUNT(n) (((n) >> 16) & 0xF)
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/*
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* rsv register definitions
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*/
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#define LPC_RSV_RECEIVED_BYTE_COUNT(n) ((n) & 0xFFFF)
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#define LPC_RSV_RXDV_EVENT_IGNORED (1 << 16)
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#define LPC_RSV_RXDV_EVENT_PREVIOUSLY_SEEN (1 << 17)
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#define LPC_RSV_CARRIER_EVNT_PREVIOUS_SEEN (1 << 18)
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#define LPC_RSV_RECEIVE_CODE_VIOLATION (1 << 19)
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#define LPC_RSV_CRC_ERROR (1 << 20)
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#define LPC_RSV_LENGTH_CHECK_ERROR (1 << 21)
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#define LPC_RSV_LENGTH_OUT_OF_RANGE (1 << 22)
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#define LPC_RSV_RECEIVE_OK (1 << 23)
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#define LPC_RSV_MULTICAST (1 << 24)
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#define LPC_RSV_BROADCAST (1 << 25)
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#define LPC_RSV_DRIBBLE_NIBBLE (1 << 26)
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#define LPC_RSV_CONTROL_FRAME (1 << 27)
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#define LPC_RSV_PAUSE (1 << 28)
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#define LPC_RSV_UNSUPPORTED_OPCODE (1 << 29)
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#define LPC_RSV_VLAN (1 << 30)
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/*
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* flowcontrolcounter register definitions
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*/
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#define LPC_FCCR_MIRRORCOUNTER(n) ((n) & 0xFFFF)
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#define LPC_FCCR_PAUSETIMER(n) (((n) >> 16) & 0xFFFF)
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/*
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* flowcontrolstatus register definitions
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*/
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#define LPC_FCCR_MIRRORCOUNTERCURRENT(n) ((n) & 0xFFFF)
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/*
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* rxfliterctrl, rxfilterwolstatus, and rxfilterwolclear shared
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* register definitions
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*/
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#define LPC_RXFLTRW_ACCEPTUNICAST (1 << 0)
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#define LPC_RXFLTRW_ACCEPTUBROADCAST (1 << 1)
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#define LPC_RXFLTRW_ACCEPTUMULTICAST (1 << 2)
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#define LPC_RXFLTRW_ACCEPTUNICASTHASH (1 << 3)
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#define LPC_RXFLTRW_ACCEPTUMULTICASTHASH (1 << 4)
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#define LPC_RXFLTRW_ACCEPTPERFECT (1 << 5)
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/*
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* rxfliterctrl register definitions
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*/
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#define LPC_RXFLTRWSTS_MAGICPACKETENWOL (1 << 12)
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#define LPC_RXFLTRWSTS_RXFILTERENWOL (1 << 13)
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/*
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* rxfilterwolstatus/rxfilterwolclear register definitions
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*/
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#define LPC_RXFLTRWSTS_RXFILTERWOL (1 << 7)
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#define LPC_RXFLTRWSTS_MAGICPACKETWOL (1 << 8)
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/*
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* intstatus, intenable, intclear, and Intset shared register
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* definitions
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*/
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#define LPC_MACINT_RXOVERRUNINTEN (1 << 0)
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#define LPC_MACINT_RXERRORONINT (1 << 1)
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#define LPC_MACINT_RXFINISHEDINTEN (1 << 2)
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#define LPC_MACINT_RXDONEINTEN (1 << 3)
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#define LPC_MACINT_TXUNDERRUNINTEN (1 << 4)
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#define LPC_MACINT_TXERRORINTEN (1 << 5)
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#define LPC_MACINT_TXFINISHEDINTEN (1 << 6)
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#define LPC_MACINT_TXDONEINTEN (1 << 7)
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#define LPC_MACINT_SOFTINTEN (1 << 12)
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#define LPC_MACINT_WAKEUPINTEN (1 << 13)
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/*
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* powerdown register definitions
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*/
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#define LPC_POWERDOWN_MACAHB (1 << 31)
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/* Upon the upcoming introduction of device tree usage in LPC32xx,
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* lpc_phy_interface_mode() and use_iram_for_net() will be extended with a
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* device parameter for access to device tree information at runtime, instead
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* of defining the values at compile time
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*/
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static inline phy_interface_t lpc_phy_interface_mode(void)
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{
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#ifdef CONFIG_ARCH_LPC32XX_MII_SUPPORT
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return PHY_INTERFACE_MODE_MII;
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#else
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return PHY_INTERFACE_MODE_RMII;
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#endif
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}
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static inline int use_iram_for_net(void)
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{
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#ifdef CONFIG_ARCH_LPC32XX_IRAM_FOR_NET
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return 1;
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#else
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return 0;
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#endif
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}
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/* Receive Status information word */
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#define RXSTATUS_SIZE 0x000007FF
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#define RXSTATUS_CONTROL (1 << 18)
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#define RXSTATUS_VLAN (1 << 19)
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#define RXSTATUS_FILTER (1 << 20)
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#define RXSTATUS_MULTICAST (1 << 21)
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#define RXSTATUS_BROADCAST (1 << 22)
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#define RXSTATUS_CRC (1 << 23)
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#define RXSTATUS_SYMBOL (1 << 24)
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#define RXSTATUS_LENGTH (1 << 25)
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#define RXSTATUS_RANGE (1 << 26)
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#define RXSTATUS_ALIGN (1 << 27)
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#define RXSTATUS_OVERRUN (1 << 28)
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#define RXSTATUS_NODESC (1 << 29)
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#define RXSTATUS_LAST (1 << 30)
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#define RXSTATUS_ERROR (1 << 31)
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#define RXSTATUS_STATUS_ERROR \
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(RXSTATUS_NODESC | RXSTATUS_OVERRUN | RXSTATUS_ALIGN | \
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RXSTATUS_RANGE | RXSTATUS_LENGTH | RXSTATUS_SYMBOL | RXSTATUS_CRC)
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/* Receive Descriptor control word */
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#define RXDESC_CONTROL_SIZE 0x000007FF
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#define RXDESC_CONTROL_INT (1 << 31)
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/* Transmit Status information word */
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#define TXSTATUS_COLLISIONS_GET(x) (((x) >> 21) & 0xF)
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#define TXSTATUS_DEFER (1 << 25)
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#define TXSTATUS_EXCESSDEFER (1 << 26)
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#define TXSTATUS_EXCESSCOLL (1 << 27)
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#define TXSTATUS_LATECOLL (1 << 28)
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#define TXSTATUS_UNDERRUN (1 << 29)
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#define TXSTATUS_NODESC (1 << 30)
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#define TXSTATUS_ERROR (1 << 31)
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/* Transmit Descriptor control word */
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#define TXDESC_CONTROL_SIZE 0x000007FF
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#define TXDESC_CONTROL_OVERRIDE (1 << 26)
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#define TXDESC_CONTROL_HUGE (1 << 27)
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#define TXDESC_CONTROL_PAD (1 << 28)
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#define TXDESC_CONTROL_CRC (1 << 29)
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#define TXDESC_CONTROL_LAST (1 << 30)
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#define TXDESC_CONTROL_INT (1 << 31)
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static int lpc_eth_hard_start_xmit(struct sk_buff *skb,
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struct net_device *ndev);
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/*
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* Structure of a TX/RX descriptors and RX status
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*/
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struct txrx_desc_t {
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__le32 packet;
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__le32 control;
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};
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struct rx_status_t {
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__le32 statusinfo;
|
|
__le32 statushashcrc;
|
|
};
|
|
|
|
/*
|
|
* Device driver data structure
|
|
*/
|
|
struct netdata_local {
|
|
struct platform_device *pdev;
|
|
struct net_device *ndev;
|
|
spinlock_t lock;
|
|
void __iomem *net_base;
|
|
u32 msg_enable;
|
|
struct sk_buff *skb[ENET_TX_DESC];
|
|
unsigned int last_tx_idx;
|
|
unsigned int num_used_tx_buffs;
|
|
struct mii_bus *mii_bus;
|
|
struct phy_device *phy_dev;
|
|
struct clk *clk;
|
|
dma_addr_t dma_buff_base_p;
|
|
void *dma_buff_base_v;
|
|
size_t dma_buff_size;
|
|
struct txrx_desc_t *tx_desc_v;
|
|
u32 *tx_stat_v;
|
|
void *tx_buff_v;
|
|
struct txrx_desc_t *rx_desc_v;
|
|
struct rx_status_t *rx_stat_v;
|
|
void *rx_buff_v;
|
|
int link;
|
|
int speed;
|
|
int duplex;
|
|
struct napi_struct napi;
|
|
};
|
|
|
|
/*
|
|
* MAC support functions
|
|
*/
|
|
static void __lpc_set_mac(struct netdata_local *pldat, u8 *mac)
|
|
{
|
|
u32 tmp;
|
|
|
|
/* Set station address */
|
|
tmp = mac[0] | ((u32)mac[1] << 8);
|
|
writel(tmp, LPC_ENET_SA2(pldat->net_base));
|
|
tmp = mac[2] | ((u32)mac[3] << 8);
|
|
writel(tmp, LPC_ENET_SA1(pldat->net_base));
|
|
tmp = mac[4] | ((u32)mac[5] << 8);
|
|
writel(tmp, LPC_ENET_SA0(pldat->net_base));
|
|
|
|
netdev_dbg(pldat->ndev, "Ethernet MAC address %pM\n", mac);
|
|
}
|
|
|
|
static void __lpc_get_mac(struct netdata_local *pldat, u8 *mac)
|
|
{
|
|
u32 tmp;
|
|
|
|
/* Get station address */
|
|
tmp = readl(LPC_ENET_SA2(pldat->net_base));
|
|
mac[0] = tmp & 0xFF;
|
|
mac[1] = tmp >> 8;
|
|
tmp = readl(LPC_ENET_SA1(pldat->net_base));
|
|
mac[2] = tmp & 0xFF;
|
|
mac[3] = tmp >> 8;
|
|
tmp = readl(LPC_ENET_SA0(pldat->net_base));
|
|
mac[4] = tmp & 0xFF;
|
|
mac[5] = tmp >> 8;
|
|
}
|
|
|
|
static void __lpc_eth_clock_enable(struct netdata_local *pldat,
|
|
bool enable)
|
|
{
|
|
if (enable)
|
|
clk_enable(pldat->clk);
|
|
else
|
|
clk_disable(pldat->clk);
|
|
}
|
|
|
|
static void __lpc_params_setup(struct netdata_local *pldat)
|
|
{
|
|
u32 tmp;
|
|
|
|
if (pldat->duplex == DUPLEX_FULL) {
|
|
tmp = readl(LPC_ENET_MAC2(pldat->net_base));
|
|
tmp |= LPC_MAC2_FULL_DUPLEX;
|
|
writel(tmp, LPC_ENET_MAC2(pldat->net_base));
|
|
tmp = readl(LPC_ENET_COMMAND(pldat->net_base));
|
|
tmp |= LPC_COMMAND_FULLDUPLEX;
|
|
writel(tmp, LPC_ENET_COMMAND(pldat->net_base));
|
|
writel(LPC_IPGT_LOAD(0x15), LPC_ENET_IPGT(pldat->net_base));
|
|
} else {
|
|
tmp = readl(LPC_ENET_MAC2(pldat->net_base));
|
|
tmp &= ~LPC_MAC2_FULL_DUPLEX;
|
|
writel(tmp, LPC_ENET_MAC2(pldat->net_base));
|
|
tmp = readl(LPC_ENET_COMMAND(pldat->net_base));
|
|
tmp &= ~LPC_COMMAND_FULLDUPLEX;
|
|
writel(tmp, LPC_ENET_COMMAND(pldat->net_base));
|
|
writel(LPC_IPGT_LOAD(0x12), LPC_ENET_IPGT(pldat->net_base));
|
|
}
|
|
|
|
if (pldat->speed == SPEED_100)
|
|
writel(LPC_SUPP_SPEED, LPC_ENET_SUPP(pldat->net_base));
|
|
else
|
|
writel(0, LPC_ENET_SUPP(pldat->net_base));
|
|
}
|
|
|
|
static void __lpc_eth_reset(struct netdata_local *pldat)
|
|
{
|
|
/* Reset all MAC logic */
|
|
writel((LPC_MAC1_RESET_TX | LPC_MAC1_RESET_MCS_TX | LPC_MAC1_RESET_RX |
|
|
LPC_MAC1_RESET_MCS_RX | LPC_MAC1_SIMULATION_RESET |
|
|
LPC_MAC1_SOFT_RESET), LPC_ENET_MAC1(pldat->net_base));
|
|
writel((LPC_COMMAND_REG_RESET | LPC_COMMAND_TXRESET |
|
|
LPC_COMMAND_RXRESET), LPC_ENET_COMMAND(pldat->net_base));
|
|
}
|
|
|
|
static int __lpc_mii_mngt_reset(struct netdata_local *pldat)
|
|
{
|
|
/* Reset MII management hardware */
|
|
writel(LPC_MCFG_RESET_MII_MGMT, LPC_ENET_MCFG(pldat->net_base));
|
|
|
|
/* Setup MII clock to slowest rate with a /28 divider */
|
|
writel(LPC_MCFG_CLOCK_SELECT(LPC_MCFG_CLOCK_HOST_DIV_28),
|
|
LPC_ENET_MCFG(pldat->net_base));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline phys_addr_t __va_to_pa(void *addr, struct netdata_local *pldat)
|
|
{
|
|
phys_addr_t phaddr;
|
|
|
|
phaddr = addr - pldat->dma_buff_base_v;
|
|
phaddr += pldat->dma_buff_base_p;
|
|
|
|
return phaddr;
|
|
}
|
|
|
|
static void lpc_eth_enable_int(void __iomem *regbase)
|
|
{
|
|
writel((LPC_MACINT_RXDONEINTEN | LPC_MACINT_TXDONEINTEN),
|
|
LPC_ENET_INTENABLE(regbase));
|
|
}
|
|
|
|
static void lpc_eth_disable_int(void __iomem *regbase)
|
|
{
|
|
writel(0, LPC_ENET_INTENABLE(regbase));
|
|
}
|
|
|
|
/* Setup TX/RX descriptors */
|
|
static void __lpc_txrx_desc_setup(struct netdata_local *pldat)
|
|
{
|
|
u32 *ptxstat;
|
|
void *tbuff;
|
|
int i;
|
|
struct txrx_desc_t *ptxrxdesc;
|
|
struct rx_status_t *prxstat;
|
|
|
|
tbuff = PTR_ALIGN(pldat->dma_buff_base_v, 16);
|
|
|
|
/* Setup TX descriptors, status, and buffers */
|
|
pldat->tx_desc_v = tbuff;
|
|
tbuff += sizeof(struct txrx_desc_t) * ENET_TX_DESC;
|
|
|
|
pldat->tx_stat_v = tbuff;
|
|
tbuff += sizeof(u32) * ENET_TX_DESC;
|
|
|
|
tbuff = PTR_ALIGN(tbuff, 16);
|
|
pldat->tx_buff_v = tbuff;
|
|
tbuff += ENET_MAXF_SIZE * ENET_TX_DESC;
|
|
|
|
/* Setup RX descriptors, status, and buffers */
|
|
pldat->rx_desc_v = tbuff;
|
|
tbuff += sizeof(struct txrx_desc_t) * ENET_RX_DESC;
|
|
|
|
tbuff = PTR_ALIGN(tbuff, 16);
|
|
pldat->rx_stat_v = tbuff;
|
|
tbuff += sizeof(struct rx_status_t) * ENET_RX_DESC;
|
|
|
|
tbuff = PTR_ALIGN(tbuff, 16);
|
|
pldat->rx_buff_v = tbuff;
|
|
tbuff += ENET_MAXF_SIZE * ENET_RX_DESC;
|
|
|
|
/* Map the TX descriptors to the TX buffers in hardware */
|
|
for (i = 0; i < ENET_TX_DESC; i++) {
|
|
ptxstat = &pldat->tx_stat_v[i];
|
|
ptxrxdesc = &pldat->tx_desc_v[i];
|
|
|
|
ptxrxdesc->packet = __va_to_pa(
|
|
pldat->tx_buff_v + i * ENET_MAXF_SIZE, pldat);
|
|
ptxrxdesc->control = 0;
|
|
*ptxstat = 0;
|
|
}
|
|
|
|
/* Map the RX descriptors to the RX buffers in hardware */
|
|
for (i = 0; i < ENET_RX_DESC; i++) {
|
|
prxstat = &pldat->rx_stat_v[i];
|
|
ptxrxdesc = &pldat->rx_desc_v[i];
|
|
|
|
ptxrxdesc->packet = __va_to_pa(
|
|
pldat->rx_buff_v + i * ENET_MAXF_SIZE, pldat);
|
|
ptxrxdesc->control = RXDESC_CONTROL_INT | (ENET_MAXF_SIZE - 1);
|
|
prxstat->statusinfo = 0;
|
|
prxstat->statushashcrc = 0;
|
|
}
|
|
|
|
/* Setup base addresses in hardware to point to buffers and
|
|
* descriptors
|
|
*/
|
|
writel((ENET_TX_DESC - 1),
|
|
LPC_ENET_TXDESCRIPTORNUMBER(pldat->net_base));
|
|
writel(__va_to_pa(pldat->tx_desc_v, pldat),
|
|
LPC_ENET_TXDESCRIPTOR(pldat->net_base));
|
|
writel(__va_to_pa(pldat->tx_stat_v, pldat),
|
|
LPC_ENET_TXSTATUS(pldat->net_base));
|
|
writel((ENET_RX_DESC - 1),
|
|
LPC_ENET_RXDESCRIPTORNUMBER(pldat->net_base));
|
|
writel(__va_to_pa(pldat->rx_desc_v, pldat),
|
|
LPC_ENET_RXDESCRIPTOR(pldat->net_base));
|
|
writel(__va_to_pa(pldat->rx_stat_v, pldat),
|
|
LPC_ENET_RXSTATUS(pldat->net_base));
|
|
}
|
|
|
|
static void __lpc_eth_init(struct netdata_local *pldat)
|
|
{
|
|
u32 tmp;
|
|
|
|
/* Disable controller and reset */
|
|
tmp = readl(LPC_ENET_COMMAND(pldat->net_base));
|
|
tmp &= ~LPC_COMMAND_RXENABLE | LPC_COMMAND_TXENABLE;
|
|
writel(tmp, LPC_ENET_COMMAND(pldat->net_base));
|
|
tmp = readl(LPC_ENET_MAC1(pldat->net_base));
|
|
tmp &= ~LPC_MAC1_RECV_ENABLE;
|
|
writel(tmp, LPC_ENET_MAC1(pldat->net_base));
|
|
|
|
/* Initial MAC setup */
|
|
writel(LPC_MAC1_PASS_ALL_RX_FRAMES, LPC_ENET_MAC1(pldat->net_base));
|
|
writel((LPC_MAC2_PAD_CRC_ENABLE | LPC_MAC2_CRC_ENABLE),
|
|
LPC_ENET_MAC2(pldat->net_base));
|
|
writel(ENET_MAXF_SIZE, LPC_ENET_MAXF(pldat->net_base));
|
|
|
|
/* Collision window, gap */
|
|
writel((LPC_CLRT_LOAD_RETRY_MAX(0xF) |
|
|
LPC_CLRT_LOAD_COLLISION_WINDOW(0x37)),
|
|
LPC_ENET_CLRT(pldat->net_base));
|
|
writel(LPC_IPGR_LOAD_PART2(0x12), LPC_ENET_IPGR(pldat->net_base));
|
|
|
|
if (lpc_phy_interface_mode() == PHY_INTERFACE_MODE_MII)
|
|
writel(LPC_COMMAND_PASSRUNTFRAME,
|
|
LPC_ENET_COMMAND(pldat->net_base));
|
|
else {
|
|
writel((LPC_COMMAND_PASSRUNTFRAME | LPC_COMMAND_RMII),
|
|
LPC_ENET_COMMAND(pldat->net_base));
|
|
writel(LPC_SUPP_RESET_RMII, LPC_ENET_SUPP(pldat->net_base));
|
|
}
|
|
|
|
__lpc_params_setup(pldat);
|
|
|
|
/* Setup TX and RX descriptors */
|
|
__lpc_txrx_desc_setup(pldat);
|
|
|
|
/* Setup packet filtering */
|
|
writel((LPC_RXFLTRW_ACCEPTUBROADCAST | LPC_RXFLTRW_ACCEPTPERFECT),
|
|
LPC_ENET_RXFILTER_CTRL(pldat->net_base));
|
|
|
|
/* Get the next TX buffer output index */
|
|
pldat->num_used_tx_buffs = 0;
|
|
pldat->last_tx_idx =
|
|
readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base));
|
|
|
|
/* Clear and enable interrupts */
|
|
writel(0xFFFF, LPC_ENET_INTCLEAR(pldat->net_base));
|
|
smp_wmb();
|
|
lpc_eth_enable_int(pldat->net_base);
|
|
|
|
/* Enable controller */
|
|
tmp = readl(LPC_ENET_COMMAND(pldat->net_base));
|
|
tmp |= LPC_COMMAND_RXENABLE | LPC_COMMAND_TXENABLE;
|
|
writel(tmp, LPC_ENET_COMMAND(pldat->net_base));
|
|
tmp = readl(LPC_ENET_MAC1(pldat->net_base));
|
|
tmp |= LPC_MAC1_RECV_ENABLE;
|
|
writel(tmp, LPC_ENET_MAC1(pldat->net_base));
|
|
}
|
|
|
|
static void __lpc_eth_shutdown(struct netdata_local *pldat)
|
|
{
|
|
/* Reset ethernet and power down PHY */
|
|
__lpc_eth_reset(pldat);
|
|
writel(0, LPC_ENET_MAC1(pldat->net_base));
|
|
writel(0, LPC_ENET_MAC2(pldat->net_base));
|
|
}
|
|
|
|
/*
|
|
* MAC<--->PHY support functions
|
|
*/
|
|
static int lpc_mdio_read(struct mii_bus *bus, int phy_id, int phyreg)
|
|
{
|
|
struct netdata_local *pldat = bus->priv;
|
|
unsigned long timeout = jiffies + msecs_to_jiffies(100);
|
|
int lps;
|
|
|
|
writel(((phy_id << 8) | phyreg), LPC_ENET_MADR(pldat->net_base));
|
|
writel(LPC_MCMD_READ, LPC_ENET_MCMD(pldat->net_base));
|
|
|
|
/* Wait for unbusy status */
|
|
while (readl(LPC_ENET_MIND(pldat->net_base)) & LPC_MIND_BUSY) {
|
|
if (time_after(jiffies, timeout))
|
|
return -EIO;
|
|
cpu_relax();
|
|
}
|
|
|
|
lps = readl(LPC_ENET_MRDD(pldat->net_base));
|
|
writel(0, LPC_ENET_MCMD(pldat->net_base));
|
|
|
|
return lps;
|
|
}
|
|
|
|
static int lpc_mdio_write(struct mii_bus *bus, int phy_id, int phyreg,
|
|
u16 phydata)
|
|
{
|
|
struct netdata_local *pldat = bus->priv;
|
|
unsigned long timeout = jiffies + msecs_to_jiffies(100);
|
|
|
|
writel(((phy_id << 8) | phyreg), LPC_ENET_MADR(pldat->net_base));
|
|
writel(phydata, LPC_ENET_MWTD(pldat->net_base));
|
|
|
|
/* Wait for completion */
|
|
while (readl(LPC_ENET_MIND(pldat->net_base)) & LPC_MIND_BUSY) {
|
|
if (time_after(jiffies, timeout))
|
|
return -EIO;
|
|
cpu_relax();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lpc_mdio_reset(struct mii_bus *bus)
|
|
{
|
|
return __lpc_mii_mngt_reset((struct netdata_local *)bus->priv);
|
|
}
|
|
|
|
static void lpc_handle_link_change(struct net_device *ndev)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
struct phy_device *phydev = pldat->phy_dev;
|
|
unsigned long flags;
|
|
|
|
bool status_change = false;
|
|
|
|
spin_lock_irqsave(&pldat->lock, flags);
|
|
|
|
if (phydev->link) {
|
|
if ((pldat->speed != phydev->speed) ||
|
|
(pldat->duplex != phydev->duplex)) {
|
|
pldat->speed = phydev->speed;
|
|
pldat->duplex = phydev->duplex;
|
|
status_change = true;
|
|
}
|
|
}
|
|
|
|
if (phydev->link != pldat->link) {
|
|
if (!phydev->link) {
|
|
pldat->speed = 0;
|
|
pldat->duplex = -1;
|
|
}
|
|
pldat->link = phydev->link;
|
|
|
|
status_change = true;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&pldat->lock, flags);
|
|
|
|
if (status_change)
|
|
__lpc_params_setup(pldat);
|
|
}
|
|
|
|
static int lpc_mii_probe(struct net_device *ndev)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
struct phy_device *phydev = phy_find_first(pldat->mii_bus);
|
|
|
|
if (!phydev) {
|
|
netdev_err(ndev, "no PHY found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Attach to the PHY */
|
|
if (lpc_phy_interface_mode() == PHY_INTERFACE_MODE_MII)
|
|
netdev_info(ndev, "using MII interface\n");
|
|
else
|
|
netdev_info(ndev, "using RMII interface\n");
|
|
phydev = phy_connect(ndev, dev_name(&phydev->dev),
|
|
&lpc_handle_link_change, 0, lpc_phy_interface_mode());
|
|
|
|
if (IS_ERR(phydev)) {
|
|
netdev_err(ndev, "Could not attach to PHY\n");
|
|
return PTR_ERR(phydev);
|
|
}
|
|
|
|
/* mask with MAC supported features */
|
|
phydev->supported &= PHY_BASIC_FEATURES;
|
|
|
|
phydev->advertising = phydev->supported;
|
|
|
|
pldat->link = 0;
|
|
pldat->speed = 0;
|
|
pldat->duplex = -1;
|
|
pldat->phy_dev = phydev;
|
|
|
|
netdev_info(ndev,
|
|
"attached PHY driver [%s] (mii_bus:phy_addr=%s, irq=%d)\n",
|
|
phydev->drv->name, dev_name(&phydev->dev), phydev->irq);
|
|
return 0;
|
|
}
|
|
|
|
static int lpc_mii_init(struct netdata_local *pldat)
|
|
{
|
|
int err = -ENXIO, i;
|
|
|
|
pldat->mii_bus = mdiobus_alloc();
|
|
if (!pldat->mii_bus) {
|
|
err = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
/* Setup MII mode */
|
|
if (lpc_phy_interface_mode() == PHY_INTERFACE_MODE_MII)
|
|
writel(LPC_COMMAND_PASSRUNTFRAME,
|
|
LPC_ENET_COMMAND(pldat->net_base));
|
|
else {
|
|
writel((LPC_COMMAND_PASSRUNTFRAME | LPC_COMMAND_RMII),
|
|
LPC_ENET_COMMAND(pldat->net_base));
|
|
writel(LPC_SUPP_RESET_RMII, LPC_ENET_SUPP(pldat->net_base));
|
|
}
|
|
|
|
pldat->mii_bus->name = "lpc_mii_bus";
|
|
pldat->mii_bus->read = &lpc_mdio_read;
|
|
pldat->mii_bus->write = &lpc_mdio_write;
|
|
pldat->mii_bus->reset = &lpc_mdio_reset;
|
|
snprintf(pldat->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
|
|
pldat->pdev->name, pldat->pdev->id);
|
|
pldat->mii_bus->priv = pldat;
|
|
pldat->mii_bus->parent = &pldat->pdev->dev;
|
|
|
|
pldat->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
|
|
if (!pldat->mii_bus->irq) {
|
|
err = -ENOMEM;
|
|
goto err_out_1;
|
|
}
|
|
|
|
for (i = 0; i < PHY_MAX_ADDR; i++)
|
|
pldat->mii_bus->irq[i] = PHY_POLL;
|
|
|
|
platform_set_drvdata(pldat->pdev, pldat->mii_bus);
|
|
|
|
if (mdiobus_register(pldat->mii_bus))
|
|
goto err_out_free_mdio_irq;
|
|
|
|
if (lpc_mii_probe(pldat->ndev) != 0)
|
|
goto err_out_unregister_bus;
|
|
|
|
return 0;
|
|
|
|
err_out_unregister_bus:
|
|
mdiobus_unregister(pldat->mii_bus);
|
|
err_out_free_mdio_irq:
|
|
kfree(pldat->mii_bus->irq);
|
|
err_out_1:
|
|
mdiobus_free(pldat->mii_bus);
|
|
err_out:
|
|
return err;
|
|
}
|
|
|
|
static void __lpc_handle_xmit(struct net_device *ndev)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
struct sk_buff *skb;
|
|
u32 txcidx, *ptxstat, txstat;
|
|
|
|
txcidx = readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base));
|
|
while (pldat->last_tx_idx != txcidx) {
|
|
skb = pldat->skb[pldat->last_tx_idx];
|
|
|
|
/* A buffer is available, get buffer status */
|
|
ptxstat = &pldat->tx_stat_v[pldat->last_tx_idx];
|
|
txstat = *ptxstat;
|
|
|
|
/* Next buffer and decrement used buffer counter */
|
|
pldat->num_used_tx_buffs--;
|
|
pldat->last_tx_idx++;
|
|
if (pldat->last_tx_idx >= ENET_TX_DESC)
|
|
pldat->last_tx_idx = 0;
|
|
|
|
/* Update collision counter */
|
|
ndev->stats.collisions += TXSTATUS_COLLISIONS_GET(txstat);
|
|
|
|
/* Any errors occurred? */
|
|
if (txstat & TXSTATUS_ERROR) {
|
|
if (txstat & TXSTATUS_UNDERRUN) {
|
|
/* FIFO underrun */
|
|
ndev->stats.tx_fifo_errors++;
|
|
}
|
|
if (txstat & TXSTATUS_LATECOLL) {
|
|
/* Late collision */
|
|
ndev->stats.tx_aborted_errors++;
|
|
}
|
|
if (txstat & TXSTATUS_EXCESSCOLL) {
|
|
/* Excessive collision */
|
|
ndev->stats.tx_aborted_errors++;
|
|
}
|
|
if (txstat & TXSTATUS_EXCESSDEFER) {
|
|
/* Defer limit */
|
|
ndev->stats.tx_aborted_errors++;
|
|
}
|
|
ndev->stats.tx_errors++;
|
|
} else {
|
|
/* Update stats */
|
|
ndev->stats.tx_packets++;
|
|
ndev->stats.tx_bytes += skb->len;
|
|
|
|
/* Free buffer */
|
|
dev_kfree_skb_irq(skb);
|
|
}
|
|
|
|
txcidx = readl(LPC_ENET_TXCONSUMEINDEX(pldat->net_base));
|
|
}
|
|
|
|
if (netif_queue_stopped(ndev))
|
|
netif_wake_queue(ndev);
|
|
}
|
|
|
|
static int __lpc_handle_recv(struct net_device *ndev, int budget)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
struct sk_buff *skb;
|
|
u32 rxconsidx, len, ethst;
|
|
struct rx_status_t *prxstat;
|
|
u8 *prdbuf;
|
|
int rx_done = 0;
|
|
|
|
/* Get the current RX buffer indexes */
|
|
rxconsidx = readl(LPC_ENET_RXCONSUMEINDEX(pldat->net_base));
|
|
while (rx_done < budget && rxconsidx !=
|
|
readl(LPC_ENET_RXPRODUCEINDEX(pldat->net_base))) {
|
|
/* Get pointer to receive status */
|
|
prxstat = &pldat->rx_stat_v[rxconsidx];
|
|
len = (prxstat->statusinfo & RXSTATUS_SIZE) + 1;
|
|
|
|
/* Status error? */
|
|
ethst = prxstat->statusinfo;
|
|
if ((ethst & (RXSTATUS_ERROR | RXSTATUS_STATUS_ERROR)) ==
|
|
(RXSTATUS_ERROR | RXSTATUS_RANGE))
|
|
ethst &= ~RXSTATUS_ERROR;
|
|
|
|
if (ethst & RXSTATUS_ERROR) {
|
|
int si = prxstat->statusinfo;
|
|
/* Check statuses */
|
|
if (si & RXSTATUS_OVERRUN) {
|
|
/* Overrun error */
|
|
ndev->stats.rx_fifo_errors++;
|
|
} else if (si & RXSTATUS_CRC) {
|
|
/* CRC error */
|
|
ndev->stats.rx_crc_errors++;
|
|
} else if (si & RXSTATUS_LENGTH) {
|
|
/* Length error */
|
|
ndev->stats.rx_length_errors++;
|
|
} else if (si & RXSTATUS_ERROR) {
|
|
/* Other error */
|
|
ndev->stats.rx_length_errors++;
|
|
}
|
|
ndev->stats.rx_errors++;
|
|
} else {
|
|
/* Packet is good */
|
|
skb = dev_alloc_skb(len + 8);
|
|
if (!skb)
|
|
ndev->stats.rx_dropped++;
|
|
else {
|
|
prdbuf = skb_put(skb, len);
|
|
|
|
/* Copy packet from buffer */
|
|
memcpy(prdbuf, pldat->rx_buff_v +
|
|
rxconsidx * ENET_MAXF_SIZE, len);
|
|
|
|
/* Pass to upper layer */
|
|
skb->protocol = eth_type_trans(skb, ndev);
|
|
netif_receive_skb(skb);
|
|
ndev->stats.rx_packets++;
|
|
ndev->stats.rx_bytes += len;
|
|
}
|
|
}
|
|
|
|
/* Increment consume index */
|
|
rxconsidx = rxconsidx + 1;
|
|
if (rxconsidx >= ENET_RX_DESC)
|
|
rxconsidx = 0;
|
|
writel(rxconsidx,
|
|
LPC_ENET_RXCONSUMEINDEX(pldat->net_base));
|
|
rx_done++;
|
|
}
|
|
|
|
return rx_done;
|
|
}
|
|
|
|
static int lpc_eth_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct netdata_local *pldat = container_of(napi,
|
|
struct netdata_local, napi);
|
|
struct net_device *ndev = pldat->ndev;
|
|
int rx_done = 0;
|
|
struct netdev_queue *txq = netdev_get_tx_queue(ndev, 0);
|
|
|
|
__netif_tx_lock(txq, smp_processor_id());
|
|
__lpc_handle_xmit(ndev);
|
|
__netif_tx_unlock(txq);
|
|
rx_done = __lpc_handle_recv(ndev, budget);
|
|
|
|
if (rx_done < budget) {
|
|
napi_complete(napi);
|
|
lpc_eth_enable_int(pldat->net_base);
|
|
}
|
|
|
|
return rx_done;
|
|
}
|
|
|
|
static irqreturn_t __lpc_eth_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct net_device *ndev = dev_id;
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
u32 tmp;
|
|
|
|
spin_lock(&pldat->lock);
|
|
|
|
tmp = readl(LPC_ENET_INTSTATUS(pldat->net_base));
|
|
/* Clear interrupts */
|
|
writel(tmp, LPC_ENET_INTCLEAR(pldat->net_base));
|
|
|
|
lpc_eth_disable_int(pldat->net_base);
|
|
if (likely(napi_schedule_prep(&pldat->napi)))
|
|
__napi_schedule(&pldat->napi);
|
|
|
|
spin_unlock(&pldat->lock);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int lpc_eth_close(struct net_device *ndev)
|
|
{
|
|
unsigned long flags;
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
|
|
if (netif_msg_ifdown(pldat))
|
|
dev_dbg(&pldat->pdev->dev, "shutting down %s\n", ndev->name);
|
|
|
|
napi_disable(&pldat->napi);
|
|
netif_stop_queue(ndev);
|
|
|
|
if (pldat->phy_dev)
|
|
phy_stop(pldat->phy_dev);
|
|
|
|
spin_lock_irqsave(&pldat->lock, flags);
|
|
__lpc_eth_reset(pldat);
|
|
netif_carrier_off(ndev);
|
|
writel(0, LPC_ENET_MAC1(pldat->net_base));
|
|
writel(0, LPC_ENET_MAC2(pldat->net_base));
|
|
spin_unlock_irqrestore(&pldat->lock, flags);
|
|
|
|
__lpc_eth_clock_enable(pldat, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lpc_eth_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
u32 len, txidx;
|
|
u32 *ptxstat;
|
|
struct txrx_desc_t *ptxrxdesc;
|
|
|
|
len = skb->len;
|
|
|
|
spin_lock_irq(&pldat->lock);
|
|
|
|
if (pldat->num_used_tx_buffs >= (ENET_TX_DESC - 1)) {
|
|
/* This function should never be called when there are no
|
|
buffers */
|
|
netif_stop_queue(ndev);
|
|
spin_unlock_irq(&pldat->lock);
|
|
WARN(1, "BUG! TX request when no free TX buffers!\n");
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
/* Get the next TX descriptor index */
|
|
txidx = readl(LPC_ENET_TXPRODUCEINDEX(pldat->net_base));
|
|
|
|
/* Setup control for the transfer */
|
|
ptxstat = &pldat->tx_stat_v[txidx];
|
|
*ptxstat = 0;
|
|
ptxrxdesc = &pldat->tx_desc_v[txidx];
|
|
ptxrxdesc->control =
|
|
(len - 1) | TXDESC_CONTROL_LAST | TXDESC_CONTROL_INT;
|
|
|
|
/* Copy data to the DMA buffer */
|
|
memcpy(pldat->tx_buff_v + txidx * ENET_MAXF_SIZE, skb->data, len);
|
|
|
|
/* Save the buffer and increment the buffer counter */
|
|
pldat->skb[txidx] = skb;
|
|
pldat->num_used_tx_buffs++;
|
|
|
|
/* Start transmit */
|
|
txidx++;
|
|
if (txidx >= ENET_TX_DESC)
|
|
txidx = 0;
|
|
writel(txidx, LPC_ENET_TXPRODUCEINDEX(pldat->net_base));
|
|
|
|
/* Stop queue if no more TX buffers */
|
|
if (pldat->num_used_tx_buffs >= (ENET_TX_DESC - 1))
|
|
netif_stop_queue(ndev);
|
|
|
|
spin_unlock_irq(&pldat->lock);
|
|
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static int lpc_set_mac_address(struct net_device *ndev, void *p)
|
|
{
|
|
struct sockaddr *addr = p;
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
unsigned long flags;
|
|
|
|
if (!is_valid_ether_addr(addr->sa_data))
|
|
return -EADDRNOTAVAIL;
|
|
memcpy(ndev->dev_addr, addr->sa_data, ETH_ALEN);
|
|
|
|
spin_lock_irqsave(&pldat->lock, flags);
|
|
|
|
/* Set station address */
|
|
__lpc_set_mac(pldat, ndev->dev_addr);
|
|
|
|
spin_unlock_irqrestore(&pldat->lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void lpc_eth_set_multicast_list(struct net_device *ndev)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
struct netdev_hw_addr_list *mcptr = &ndev->mc;
|
|
struct netdev_hw_addr *ha;
|
|
u32 tmp32, hash_val, hashlo, hashhi;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&pldat->lock, flags);
|
|
|
|
/* Set station address */
|
|
__lpc_set_mac(pldat, ndev->dev_addr);
|
|
|
|
tmp32 = LPC_RXFLTRW_ACCEPTUBROADCAST | LPC_RXFLTRW_ACCEPTPERFECT;
|
|
|
|
if (ndev->flags & IFF_PROMISC)
|
|
tmp32 |= LPC_RXFLTRW_ACCEPTUNICAST |
|
|
LPC_RXFLTRW_ACCEPTUMULTICAST;
|
|
if (ndev->flags & IFF_ALLMULTI)
|
|
tmp32 |= LPC_RXFLTRW_ACCEPTUMULTICAST;
|
|
|
|
if (netdev_hw_addr_list_count(mcptr))
|
|
tmp32 |= LPC_RXFLTRW_ACCEPTUMULTICASTHASH;
|
|
|
|
writel(tmp32, LPC_ENET_RXFILTER_CTRL(pldat->net_base));
|
|
|
|
|
|
/* Set initial hash table */
|
|
hashlo = 0x0;
|
|
hashhi = 0x0;
|
|
|
|
/* 64 bits : multicast address in hash table */
|
|
netdev_hw_addr_list_for_each(ha, mcptr) {
|
|
hash_val = (ether_crc(6, ha->addr) >> 23) & 0x3F;
|
|
|
|
if (hash_val >= 32)
|
|
hashhi |= 1 << (hash_val - 32);
|
|
else
|
|
hashlo |= 1 << hash_val;
|
|
}
|
|
|
|
writel(hashlo, LPC_ENET_HASHFILTERL(pldat->net_base));
|
|
writel(hashhi, LPC_ENET_HASHFILTERH(pldat->net_base));
|
|
|
|
spin_unlock_irqrestore(&pldat->lock, flags);
|
|
}
|
|
|
|
static int lpc_eth_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
struct phy_device *phydev = pldat->phy_dev;
|
|
|
|
if (!netif_running(ndev))
|
|
return -EINVAL;
|
|
|
|
if (!phydev)
|
|
return -ENODEV;
|
|
|
|
return phy_mii_ioctl(phydev, req, cmd);
|
|
}
|
|
|
|
static int lpc_eth_open(struct net_device *ndev)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
|
|
if (netif_msg_ifup(pldat))
|
|
dev_dbg(&pldat->pdev->dev, "enabling %s\n", ndev->name);
|
|
|
|
if (!is_valid_ether_addr(ndev->dev_addr))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
__lpc_eth_clock_enable(pldat, true);
|
|
|
|
/* Reset and initialize */
|
|
__lpc_eth_reset(pldat);
|
|
__lpc_eth_init(pldat);
|
|
|
|
/* schedule a link state check */
|
|
phy_start(pldat->phy_dev);
|
|
netif_start_queue(ndev);
|
|
napi_enable(&pldat->napi);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Ethtool ops
|
|
*/
|
|
static void lpc_eth_ethtool_getdrvinfo(struct net_device *ndev,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strcpy(info->driver, MODNAME);
|
|
strcpy(info->version, DRV_VERSION);
|
|
strcpy(info->bus_info, dev_name(ndev->dev.parent));
|
|
}
|
|
|
|
static u32 lpc_eth_ethtool_getmsglevel(struct net_device *ndev)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
|
|
return pldat->msg_enable;
|
|
}
|
|
|
|
static void lpc_eth_ethtool_setmsglevel(struct net_device *ndev, u32 level)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
|
|
pldat->msg_enable = level;
|
|
}
|
|
|
|
static int lpc_eth_ethtool_getsettings(struct net_device *ndev,
|
|
struct ethtool_cmd *cmd)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
struct phy_device *phydev = pldat->phy_dev;
|
|
|
|
if (!phydev)
|
|
return -EOPNOTSUPP;
|
|
|
|
return phy_ethtool_gset(phydev, cmd);
|
|
}
|
|
|
|
static int lpc_eth_ethtool_setsettings(struct net_device *ndev,
|
|
struct ethtool_cmd *cmd)
|
|
{
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
struct phy_device *phydev = pldat->phy_dev;
|
|
|
|
if (!phydev)
|
|
return -EOPNOTSUPP;
|
|
|
|
return phy_ethtool_sset(phydev, cmd);
|
|
}
|
|
|
|
static const struct ethtool_ops lpc_eth_ethtool_ops = {
|
|
.get_drvinfo = lpc_eth_ethtool_getdrvinfo,
|
|
.get_settings = lpc_eth_ethtool_getsettings,
|
|
.set_settings = lpc_eth_ethtool_setsettings,
|
|
.get_msglevel = lpc_eth_ethtool_getmsglevel,
|
|
.set_msglevel = lpc_eth_ethtool_setmsglevel,
|
|
.get_link = ethtool_op_get_link,
|
|
};
|
|
|
|
static const struct net_device_ops lpc_netdev_ops = {
|
|
.ndo_open = lpc_eth_open,
|
|
.ndo_stop = lpc_eth_close,
|
|
.ndo_start_xmit = lpc_eth_hard_start_xmit,
|
|
.ndo_set_rx_mode = lpc_eth_set_multicast_list,
|
|
.ndo_do_ioctl = lpc_eth_ioctl,
|
|
.ndo_set_mac_address = lpc_set_mac_address,
|
|
};
|
|
|
|
static int lpc_eth_drv_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res;
|
|
struct resource *dma_res;
|
|
struct net_device *ndev;
|
|
struct netdata_local *pldat;
|
|
struct phy_device *phydev;
|
|
dma_addr_t dma_handle;
|
|
int irq, ret;
|
|
|
|
/* Get platform resources */
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
dma_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
irq = platform_get_irq(pdev, 0);
|
|
if ((!res) || (!dma_res) || (irq < 0) || (irq >= NR_IRQS)) {
|
|
dev_err(&pdev->dev, "error getting resources.\n");
|
|
ret = -ENXIO;
|
|
goto err_exit;
|
|
}
|
|
|
|
/* Allocate net driver data structure */
|
|
ndev = alloc_etherdev(sizeof(struct netdata_local));
|
|
if (!ndev) {
|
|
dev_err(&pdev->dev, "could not allocate device.\n");
|
|
ret = -ENOMEM;
|
|
goto err_exit;
|
|
}
|
|
|
|
SET_NETDEV_DEV(ndev, &pdev->dev);
|
|
|
|
pldat = netdev_priv(ndev);
|
|
pldat->pdev = pdev;
|
|
pldat->ndev = ndev;
|
|
|
|
spin_lock_init(&pldat->lock);
|
|
|
|
/* Save resources */
|
|
ndev->irq = irq;
|
|
|
|
/* Get clock for the device */
|
|
pldat->clk = clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(pldat->clk)) {
|
|
dev_err(&pdev->dev, "error getting clock.\n");
|
|
ret = PTR_ERR(pldat->clk);
|
|
goto err_out_free_dev;
|
|
}
|
|
|
|
/* Enable network clock */
|
|
__lpc_eth_clock_enable(pldat, true);
|
|
|
|
/* Map IO space */
|
|
pldat->net_base = ioremap(res->start, res->end - res->start + 1);
|
|
if (!pldat->net_base) {
|
|
dev_err(&pdev->dev, "failed to map registers\n");
|
|
ret = -ENOMEM;
|
|
goto err_out_disable_clocks;
|
|
}
|
|
ret = request_irq(ndev->irq, __lpc_eth_interrupt, 0,
|
|
ndev->name, ndev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "error requesting interrupt.\n");
|
|
goto err_out_iounmap;
|
|
}
|
|
|
|
/* Fill in the fields of the device structure with ethernet values. */
|
|
ether_setup(ndev);
|
|
|
|
/* Setup driver functions */
|
|
ndev->netdev_ops = &lpc_netdev_ops;
|
|
ndev->ethtool_ops = &lpc_eth_ethtool_ops;
|
|
ndev->watchdog_timeo = msecs_to_jiffies(2500);
|
|
|
|
/* Get size of DMA buffers/descriptors region */
|
|
pldat->dma_buff_size = (ENET_TX_DESC + ENET_RX_DESC) * (ENET_MAXF_SIZE +
|
|
sizeof(struct txrx_desc_t) + sizeof(struct rx_status_t));
|
|
pldat->dma_buff_base_v = 0;
|
|
|
|
if (use_iram_for_net()) {
|
|
dma_handle = dma_res->start;
|
|
if (pldat->dma_buff_size <= lpc32xx_return_iram_size())
|
|
pldat->dma_buff_base_v =
|
|
io_p2v(dma_res->start);
|
|
else
|
|
netdev_err(ndev,
|
|
"IRAM not big enough for net buffers, using SDRAM instead.\n");
|
|
}
|
|
|
|
if (pldat->dma_buff_base_v == 0) {
|
|
pldat->dma_buff_size = PAGE_ALIGN(pldat->dma_buff_size);
|
|
|
|
/* Allocate a chunk of memory for the DMA ethernet buffers
|
|
and descriptors */
|
|
pldat->dma_buff_base_v =
|
|
dma_alloc_coherent(&pldat->pdev->dev,
|
|
pldat->dma_buff_size, &dma_handle,
|
|
GFP_KERNEL);
|
|
|
|
if (pldat->dma_buff_base_v == NULL) {
|
|
dev_err(&pdev->dev, "error getting DMA region.\n");
|
|
ret = -ENOMEM;
|
|
goto err_out_free_irq;
|
|
}
|
|
}
|
|
pldat->dma_buff_base_p = dma_handle;
|
|
|
|
netdev_dbg(ndev, "IO address start :0x%08x\n",
|
|
res->start);
|
|
netdev_dbg(ndev, "IO address size :%d\n",
|
|
res->end - res->start + 1);
|
|
netdev_err(ndev, "IO address (mapped) :0x%p\n",
|
|
pldat->net_base);
|
|
netdev_dbg(ndev, "IRQ number :%d\n", ndev->irq);
|
|
netdev_dbg(ndev, "DMA buffer size :%d\n", pldat->dma_buff_size);
|
|
netdev_dbg(ndev, "DMA buffer P address :0x%08x\n",
|
|
pldat->dma_buff_base_p);
|
|
netdev_dbg(ndev, "DMA buffer V address :0x%p\n",
|
|
pldat->dma_buff_base_v);
|
|
|
|
/* Get MAC address from current HW setting (POR state is all zeros) */
|
|
__lpc_get_mac(pldat, ndev->dev_addr);
|
|
|
|
#ifdef CONFIG_OF_NET
|
|
if (!is_valid_ether_addr(ndev->dev_addr)) {
|
|
const char *macaddr = of_get_mac_address(pdev->dev.of_node);
|
|
if (macaddr)
|
|
memcpy(ndev->dev_addr, macaddr, ETH_ALEN);
|
|
}
|
|
#endif
|
|
if (!is_valid_ether_addr(ndev->dev_addr))
|
|
eth_hw_addr_random(ndev);
|
|
|
|
/* Reset the ethernet controller */
|
|
__lpc_eth_reset(pldat);
|
|
|
|
/* then shut everything down to save power */
|
|
__lpc_eth_shutdown(pldat);
|
|
|
|
/* Set default parameters */
|
|
pldat->msg_enable = NETIF_MSG_LINK;
|
|
|
|
/* Force an MII interface reset and clock setup */
|
|
__lpc_mii_mngt_reset(pldat);
|
|
|
|
/* Force default PHY interface setup in chip, this will probably be
|
|
changed by the PHY driver */
|
|
pldat->link = 0;
|
|
pldat->speed = 100;
|
|
pldat->duplex = DUPLEX_FULL;
|
|
__lpc_params_setup(pldat);
|
|
|
|
netif_napi_add(ndev, &pldat->napi, lpc_eth_poll, NAPI_WEIGHT);
|
|
|
|
ret = register_netdev(ndev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
|
|
goto err_out_dma_unmap;
|
|
}
|
|
platform_set_drvdata(pdev, ndev);
|
|
|
|
if (lpc_mii_init(pldat) != 0)
|
|
goto err_out_unregister_netdev;
|
|
|
|
netdev_info(ndev, "LPC mac at 0x%08x irq %d\n",
|
|
res->start, ndev->irq);
|
|
|
|
phydev = pldat->phy_dev;
|
|
|
|
device_init_wakeup(&pdev->dev, 1);
|
|
device_set_wakeup_enable(&pdev->dev, 0);
|
|
|
|
return 0;
|
|
|
|
err_out_unregister_netdev:
|
|
platform_set_drvdata(pdev, NULL);
|
|
unregister_netdev(ndev);
|
|
err_out_dma_unmap:
|
|
if (!use_iram_for_net() ||
|
|
pldat->dma_buff_size > lpc32xx_return_iram_size())
|
|
dma_free_coherent(&pldat->pdev->dev, pldat->dma_buff_size,
|
|
pldat->dma_buff_base_v,
|
|
pldat->dma_buff_base_p);
|
|
err_out_free_irq:
|
|
free_irq(ndev->irq, ndev);
|
|
err_out_iounmap:
|
|
iounmap(pldat->net_base);
|
|
err_out_disable_clocks:
|
|
clk_disable(pldat->clk);
|
|
clk_put(pldat->clk);
|
|
err_out_free_dev:
|
|
free_netdev(ndev);
|
|
err_exit:
|
|
pr_err("%s: not found (%d).\n", MODNAME, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int lpc_eth_drv_remove(struct platform_device *pdev)
|
|
{
|
|
struct net_device *ndev = platform_get_drvdata(pdev);
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
|
|
unregister_netdev(ndev);
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
if (!use_iram_for_net() ||
|
|
pldat->dma_buff_size > lpc32xx_return_iram_size())
|
|
dma_free_coherent(&pldat->pdev->dev, pldat->dma_buff_size,
|
|
pldat->dma_buff_base_v,
|
|
pldat->dma_buff_base_p);
|
|
free_irq(ndev->irq, ndev);
|
|
iounmap(pldat->net_base);
|
|
mdiobus_free(pldat->mii_bus);
|
|
clk_disable(pldat->clk);
|
|
clk_put(pldat->clk);
|
|
free_netdev(ndev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int lpc_eth_drv_suspend(struct platform_device *pdev,
|
|
pm_message_t state)
|
|
{
|
|
struct net_device *ndev = platform_get_drvdata(pdev);
|
|
struct netdata_local *pldat = netdev_priv(ndev);
|
|
|
|
if (device_may_wakeup(&pdev->dev))
|
|
enable_irq_wake(ndev->irq);
|
|
|
|
if (ndev) {
|
|
if (netif_running(ndev)) {
|
|
netif_device_detach(ndev);
|
|
__lpc_eth_shutdown(pldat);
|
|
clk_disable(pldat->clk);
|
|
|
|
/*
|
|
* Reset again now clock is disable to be sure
|
|
* EMC_MDC is down
|
|
*/
|
|
__lpc_eth_reset(pldat);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lpc_eth_drv_resume(struct platform_device *pdev)
|
|
{
|
|
struct net_device *ndev = platform_get_drvdata(pdev);
|
|
struct netdata_local *pldat;
|
|
|
|
if (device_may_wakeup(&pdev->dev))
|
|
disable_irq_wake(ndev->irq);
|
|
|
|
if (ndev) {
|
|
if (netif_running(ndev)) {
|
|
pldat = netdev_priv(ndev);
|
|
|
|
/* Enable interface clock */
|
|
clk_enable(pldat->clk);
|
|
|
|
/* Reset and initialize */
|
|
__lpc_eth_reset(pldat);
|
|
__lpc_eth_init(pldat);
|
|
|
|
netif_device_attach(ndev);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static struct platform_driver lpc_eth_driver = {
|
|
.probe = lpc_eth_drv_probe,
|
|
.remove = __devexit_p(lpc_eth_drv_remove),
|
|
#ifdef CONFIG_PM
|
|
.suspend = lpc_eth_drv_suspend,
|
|
.resume = lpc_eth_drv_resume,
|
|
#endif
|
|
.driver = {
|
|
.name = MODNAME,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(lpc_eth_driver);
|
|
|
|
MODULE_AUTHOR("Kevin Wells <kevin.wells@nxp.com>");
|
|
MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
|
|
MODULE_DESCRIPTION("LPC Ethernet Driver");
|
|
MODULE_LICENSE("GPL");
|