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tegrakernel/kernel/kernel-4.9/drivers/net/ethernet/renesas/sh_eth.c

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/* SuperH Ethernet device driver
*
* Copyright (C) 2014 Renesas Electronics Corporation
* Copyright (C) 2006-2012 Nobuhiro Iwamatsu
* Copyright (C) 2008-2014 Renesas Solutions Corp.
* Copyright (C) 2013-2016 Cogent Embedded, Inc.
* Copyright (C) 2014 Codethink Limited
*
* 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.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/dma-mapping.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/mdio-bitbang.h>
#include <linux/netdevice.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/of_net.h>
#include <linux/phy.h>
#include <linux/cache.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/ethtool.h>
#include <linux/if_vlan.h>
#include <linux/clk.h>
#include <linux/sh_eth.h>
#include <linux/of_mdio.h>
#include "sh_eth.h"
#define SH_ETH_DEF_MSG_ENABLE \
(NETIF_MSG_LINK | \
NETIF_MSG_TIMER | \
NETIF_MSG_RX_ERR| \
NETIF_MSG_TX_ERR)
#define SH_ETH_OFFSET_INVALID ((u16)~0)
#define SH_ETH_OFFSET_DEFAULTS \
[0 ... SH_ETH_MAX_REGISTER_OFFSET - 1] = SH_ETH_OFFSET_INVALID
static const u16 sh_eth_offset_gigabit[SH_ETH_MAX_REGISTER_OFFSET] = {
SH_ETH_OFFSET_DEFAULTS,
[EDSR] = 0x0000,
[EDMR] = 0x0400,
[EDTRR] = 0x0408,
[EDRRR] = 0x0410,
[EESR] = 0x0428,
[EESIPR] = 0x0430,
[TDLAR] = 0x0010,
[TDFAR] = 0x0014,
[TDFXR] = 0x0018,
[TDFFR] = 0x001c,
[RDLAR] = 0x0030,
[RDFAR] = 0x0034,
[RDFXR] = 0x0038,
[RDFFR] = 0x003c,
[TRSCER] = 0x0438,
[RMFCR] = 0x0440,
[TFTR] = 0x0448,
[FDR] = 0x0450,
[RMCR] = 0x0458,
[RPADIR] = 0x0460,
[FCFTR] = 0x0468,
[CSMR] = 0x04E4,
[ECMR] = 0x0500,
[ECSR] = 0x0510,
[ECSIPR] = 0x0518,
[PIR] = 0x0520,
[PSR] = 0x0528,
[PIPR] = 0x052c,
[RFLR] = 0x0508,
[APR] = 0x0554,
[MPR] = 0x0558,
[PFTCR] = 0x055c,
[PFRCR] = 0x0560,
[TPAUSER] = 0x0564,
[GECMR] = 0x05b0,
[BCULR] = 0x05b4,
[MAHR] = 0x05c0,
[MALR] = 0x05c8,
[TROCR] = 0x0700,
[CDCR] = 0x0708,
[LCCR] = 0x0710,
[CEFCR] = 0x0740,
[FRECR] = 0x0748,
[TSFRCR] = 0x0750,
[TLFRCR] = 0x0758,
[RFCR] = 0x0760,
[CERCR] = 0x0768,
[CEECR] = 0x0770,
[MAFCR] = 0x0778,
[RMII_MII] = 0x0790,
[ARSTR] = 0x0000,
[TSU_CTRST] = 0x0004,
[TSU_FWEN0] = 0x0010,
[TSU_FWEN1] = 0x0014,
[TSU_FCM] = 0x0018,
[TSU_BSYSL0] = 0x0020,
[TSU_BSYSL1] = 0x0024,
[TSU_PRISL0] = 0x0028,
[TSU_PRISL1] = 0x002c,
[TSU_FWSL0] = 0x0030,
[TSU_FWSL1] = 0x0034,
[TSU_FWSLC] = 0x0038,
[TSU_QTAG0] = 0x0040,
[TSU_QTAG1] = 0x0044,
[TSU_FWSR] = 0x0050,
[TSU_FWINMK] = 0x0054,
[TSU_ADQT0] = 0x0048,
[TSU_ADQT1] = 0x004c,
[TSU_VTAG0] = 0x0058,
[TSU_VTAG1] = 0x005c,
[TSU_ADSBSY] = 0x0060,
[TSU_TEN] = 0x0064,
[TSU_POST1] = 0x0070,
[TSU_POST2] = 0x0074,
[TSU_POST3] = 0x0078,
[TSU_POST4] = 0x007c,
[TSU_ADRH0] = 0x0100,
[TXNLCR0] = 0x0080,
[TXALCR0] = 0x0084,
[RXNLCR0] = 0x0088,
[RXALCR0] = 0x008c,
[FWNLCR0] = 0x0090,
[FWALCR0] = 0x0094,
[TXNLCR1] = 0x00a0,
[TXALCR1] = 0x00a0,
[RXNLCR1] = 0x00a8,
[RXALCR1] = 0x00ac,
[FWNLCR1] = 0x00b0,
[FWALCR1] = 0x00b4,
};
static const u16 sh_eth_offset_fast_rz[SH_ETH_MAX_REGISTER_OFFSET] = {
SH_ETH_OFFSET_DEFAULTS,
[EDSR] = 0x0000,
[EDMR] = 0x0400,
[EDTRR] = 0x0408,
[EDRRR] = 0x0410,
[EESR] = 0x0428,
[EESIPR] = 0x0430,
[TDLAR] = 0x0010,
[TDFAR] = 0x0014,
[TDFXR] = 0x0018,
[TDFFR] = 0x001c,
[RDLAR] = 0x0030,
[RDFAR] = 0x0034,
[RDFXR] = 0x0038,
[RDFFR] = 0x003c,
[TRSCER] = 0x0438,
[RMFCR] = 0x0440,
[TFTR] = 0x0448,
[FDR] = 0x0450,
[RMCR] = 0x0458,
[RPADIR] = 0x0460,
[FCFTR] = 0x0468,
[CSMR] = 0x04E4,
[ECMR] = 0x0500,
[RFLR] = 0x0508,
[ECSR] = 0x0510,
[ECSIPR] = 0x0518,
[PIR] = 0x0520,
[APR] = 0x0554,
[MPR] = 0x0558,
[PFTCR] = 0x055c,
[PFRCR] = 0x0560,
[TPAUSER] = 0x0564,
[MAHR] = 0x05c0,
[MALR] = 0x05c8,
[CEFCR] = 0x0740,
[FRECR] = 0x0748,
[TSFRCR] = 0x0750,
[TLFRCR] = 0x0758,
[RFCR] = 0x0760,
[MAFCR] = 0x0778,
[ARSTR] = 0x0000,
[TSU_CTRST] = 0x0004,
[TSU_FWSLC] = 0x0038,
[TSU_VTAG0] = 0x0058,
[TSU_ADSBSY] = 0x0060,
[TSU_TEN] = 0x0064,
[TSU_POST1] = 0x0070,
[TSU_POST2] = 0x0074,
[TSU_POST3] = 0x0078,
[TSU_POST4] = 0x007c,
[TSU_ADRH0] = 0x0100,
[TXNLCR0] = 0x0080,
[TXALCR0] = 0x0084,
[RXNLCR0] = 0x0088,
[RXALCR0] = 0x008C,
};
static const u16 sh_eth_offset_fast_rcar[SH_ETH_MAX_REGISTER_OFFSET] = {
SH_ETH_OFFSET_DEFAULTS,
[ECMR] = 0x0300,
[RFLR] = 0x0308,
[ECSR] = 0x0310,
[ECSIPR] = 0x0318,
[PIR] = 0x0320,
[PSR] = 0x0328,
[RDMLR] = 0x0340,
[IPGR] = 0x0350,
[APR] = 0x0354,
[MPR] = 0x0358,
[RFCF] = 0x0360,
[TPAUSER] = 0x0364,
[TPAUSECR] = 0x0368,
[MAHR] = 0x03c0,
[MALR] = 0x03c8,
[TROCR] = 0x03d0,
[CDCR] = 0x03d4,
[LCCR] = 0x03d8,
[CNDCR] = 0x03dc,
[CEFCR] = 0x03e4,
[FRECR] = 0x03e8,
[TSFRCR] = 0x03ec,
[TLFRCR] = 0x03f0,
[RFCR] = 0x03f4,
[MAFCR] = 0x03f8,
[EDMR] = 0x0200,
[EDTRR] = 0x0208,
[EDRRR] = 0x0210,
[TDLAR] = 0x0218,
[RDLAR] = 0x0220,
[EESR] = 0x0228,
[EESIPR] = 0x0230,
[TRSCER] = 0x0238,
[RMFCR] = 0x0240,
[TFTR] = 0x0248,
[FDR] = 0x0250,
[RMCR] = 0x0258,
[TFUCR] = 0x0264,
[RFOCR] = 0x0268,
[RMIIMODE] = 0x026c,
[FCFTR] = 0x0270,
[TRIMD] = 0x027c,
};
static const u16 sh_eth_offset_fast_sh4[SH_ETH_MAX_REGISTER_OFFSET] = {
SH_ETH_OFFSET_DEFAULTS,
[ECMR] = 0x0100,
[RFLR] = 0x0108,
[ECSR] = 0x0110,
[ECSIPR] = 0x0118,
[PIR] = 0x0120,
[PSR] = 0x0128,
[RDMLR] = 0x0140,
[IPGR] = 0x0150,
[APR] = 0x0154,
[MPR] = 0x0158,
[TPAUSER] = 0x0164,
[RFCF] = 0x0160,
[TPAUSECR] = 0x0168,
[BCFRR] = 0x016c,
[MAHR] = 0x01c0,
[MALR] = 0x01c8,
[TROCR] = 0x01d0,
[CDCR] = 0x01d4,
[LCCR] = 0x01d8,
[CNDCR] = 0x01dc,
[CEFCR] = 0x01e4,
[FRECR] = 0x01e8,
[TSFRCR] = 0x01ec,
[TLFRCR] = 0x01f0,
[RFCR] = 0x01f4,
[MAFCR] = 0x01f8,
[RTRATE] = 0x01fc,
[EDMR] = 0x0000,
[EDTRR] = 0x0008,
[EDRRR] = 0x0010,
[TDLAR] = 0x0018,
[RDLAR] = 0x0020,
[EESR] = 0x0028,
[EESIPR] = 0x0030,
[TRSCER] = 0x0038,
[RMFCR] = 0x0040,
[TFTR] = 0x0048,
[FDR] = 0x0050,
[RMCR] = 0x0058,
[TFUCR] = 0x0064,
[RFOCR] = 0x0068,
[FCFTR] = 0x0070,
[RPADIR] = 0x0078,
[TRIMD] = 0x007c,
[RBWAR] = 0x00c8,
[RDFAR] = 0x00cc,
[TBRAR] = 0x00d4,
[TDFAR] = 0x00d8,
};
static const u16 sh_eth_offset_fast_sh3_sh2[SH_ETH_MAX_REGISTER_OFFSET] = {
SH_ETH_OFFSET_DEFAULTS,
[EDMR] = 0x0000,
[EDTRR] = 0x0004,
[EDRRR] = 0x0008,
[TDLAR] = 0x000c,
[RDLAR] = 0x0010,
[EESR] = 0x0014,
[EESIPR] = 0x0018,
[TRSCER] = 0x001c,
[RMFCR] = 0x0020,
[TFTR] = 0x0024,
[FDR] = 0x0028,
[RMCR] = 0x002c,
[EDOCR] = 0x0030,
[FCFTR] = 0x0034,
[RPADIR] = 0x0038,
[TRIMD] = 0x003c,
[RBWAR] = 0x0040,
[RDFAR] = 0x0044,
[TBRAR] = 0x004c,
[TDFAR] = 0x0050,
[ECMR] = 0x0160,
[ECSR] = 0x0164,
[ECSIPR] = 0x0168,
[PIR] = 0x016c,
[MAHR] = 0x0170,
[MALR] = 0x0174,
[RFLR] = 0x0178,
[PSR] = 0x017c,
[TROCR] = 0x0180,
[CDCR] = 0x0184,
[LCCR] = 0x0188,
[CNDCR] = 0x018c,
[CEFCR] = 0x0194,
[FRECR] = 0x0198,
[TSFRCR] = 0x019c,
[TLFRCR] = 0x01a0,
[RFCR] = 0x01a4,
[MAFCR] = 0x01a8,
[IPGR] = 0x01b4,
[APR] = 0x01b8,
[MPR] = 0x01bc,
[TPAUSER] = 0x01c4,
[BCFR] = 0x01cc,
[ARSTR] = 0x0000,
[TSU_CTRST] = 0x0004,
[TSU_FWEN0] = 0x0010,
[TSU_FWEN1] = 0x0014,
[TSU_FCM] = 0x0018,
[TSU_BSYSL0] = 0x0020,
[TSU_BSYSL1] = 0x0024,
[TSU_PRISL0] = 0x0028,
[TSU_PRISL1] = 0x002c,
[TSU_FWSL0] = 0x0030,
[TSU_FWSL1] = 0x0034,
[TSU_FWSLC] = 0x0038,
[TSU_QTAGM0] = 0x0040,
[TSU_QTAGM1] = 0x0044,
[TSU_ADQT0] = 0x0048,
[TSU_ADQT1] = 0x004c,
[TSU_FWSR] = 0x0050,
[TSU_FWINMK] = 0x0054,
[TSU_ADSBSY] = 0x0060,
[TSU_TEN] = 0x0064,
[TSU_POST1] = 0x0070,
[TSU_POST2] = 0x0074,
[TSU_POST3] = 0x0078,
[TSU_POST4] = 0x007c,
[TXNLCR0] = 0x0080,
[TXALCR0] = 0x0084,
[RXNLCR0] = 0x0088,
[RXALCR0] = 0x008c,
[FWNLCR0] = 0x0090,
[FWALCR0] = 0x0094,
[TXNLCR1] = 0x00a0,
[TXALCR1] = 0x00a0,
[RXNLCR1] = 0x00a8,
[RXALCR1] = 0x00ac,
[FWNLCR1] = 0x00b0,
[FWALCR1] = 0x00b4,
[TSU_ADRH0] = 0x0100,
};
static void sh_eth_rcv_snd_disable(struct net_device *ndev);
static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev);
static void sh_eth_write(struct net_device *ndev, u32 data, int enum_index)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u16 offset = mdp->reg_offset[enum_index];
if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
return;
iowrite32(data, mdp->addr + offset);
}
static u32 sh_eth_read(struct net_device *ndev, int enum_index)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u16 offset = mdp->reg_offset[enum_index];
if (WARN_ON(offset == SH_ETH_OFFSET_INVALID))
return ~0U;
return ioread32(mdp->addr + offset);
}
static void sh_eth_modify(struct net_device *ndev, int enum_index, u32 clear,
u32 set)
{
sh_eth_write(ndev, (sh_eth_read(ndev, enum_index) & ~clear) | set,
enum_index);
}
static bool sh_eth_is_gether(struct sh_eth_private *mdp)
{
return mdp->reg_offset == sh_eth_offset_gigabit;
}
static bool sh_eth_is_rz_fast_ether(struct sh_eth_private *mdp)
{
return mdp->reg_offset == sh_eth_offset_fast_rz;
}
static void sh_eth_select_mii(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 value;
switch (mdp->phy_interface) {
case PHY_INTERFACE_MODE_GMII:
value = 0x2;
break;
case PHY_INTERFACE_MODE_MII:
value = 0x1;
break;
case PHY_INTERFACE_MODE_RMII:
value = 0x0;
break;
default:
netdev_warn(ndev,
"PHY interface mode was not setup. Set to MII.\n");
value = 0x1;
break;
}
sh_eth_write(ndev, value, RMII_MII);
}
static void sh_eth_set_duplex(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
sh_eth_modify(ndev, ECMR, ECMR_DM, mdp->duplex ? ECMR_DM : 0);
}
static void sh_eth_chip_reset(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
/* reset device */
sh_eth_tsu_write(mdp, ARSTR_ARST, ARSTR);
mdelay(1);
}
static void sh_eth_set_rate_gether(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
switch (mdp->speed) {
case 10: /* 10BASE */
sh_eth_write(ndev, GECMR_10, GECMR);
break;
case 100:/* 100BASE */
sh_eth_write(ndev, GECMR_100, GECMR);
break;
case 1000: /* 1000BASE */
sh_eth_write(ndev, GECMR_1000, GECMR);
break;
}
}
#ifdef CONFIG_OF
/* R7S72100 */
static struct sh_eth_cpu_data r7s72100_data = {
.chip_reset = sh_eth_chip_reset,
.set_duplex = sh_eth_set_duplex,
.register_type = SH_ETH_REG_FAST_RZ,
.ecsr_value = ECSR_ICD,
.ecsipr_value = ECSIPR_ICDIP,
.eesipr_value = 0xe77f009f,
.tx_check = EESR_TC1 | EESR_FTC,
.eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
EESR_TDE | EESR_ECI,
.fdr_value = 0x0000070f,
.no_psr = 1,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.hw_swap = 1,
.rpadir = 1,
.rpadir_value = 2 << 16,
.no_trimd = 1,
.no_ade = 1,
.hw_crc = 1,
.tsu = 1,
.shift_rd0 = 1,
};
static void sh_eth_chip_reset_r8a7740(struct net_device *ndev)
{
sh_eth_chip_reset(ndev);
sh_eth_select_mii(ndev);
}
/* R8A7740 */
static struct sh_eth_cpu_data r8a7740_data = {
.chip_reset = sh_eth_chip_reset_r8a7740,
.set_duplex = sh_eth_set_duplex,
.set_rate = sh_eth_set_rate_gether,
.register_type = SH_ETH_REG_GIGABIT,
.ecsr_value = ECSR_ICD | ECSR_MPD,
.ecsipr_value = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
.eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
.tx_check = EESR_TC1 | EESR_FTC,
.eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
EESR_TDE | EESR_ECI,
.fdr_value = 0x0000070f,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.bculr = 1,
.hw_swap = 1,
.rpadir = 1,
.rpadir_value = 2 << 16,
.no_trimd = 1,
.no_ade = 1,
.hw_crc = 1,
.tsu = 1,
.select_mii = 1,
.shift_rd0 = 1,
};
/* There is CPU dependent code */
static void sh_eth_set_rate_r8a777x(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
switch (mdp->speed) {
case 10: /* 10BASE */
sh_eth_modify(ndev, ECMR, ECMR_ELB, 0);
break;
case 100:/* 100BASE */
sh_eth_modify(ndev, ECMR, ECMR_ELB, ECMR_ELB);
break;
}
}
/* R8A7778/9 */
static struct sh_eth_cpu_data r8a777x_data = {
.set_duplex = sh_eth_set_duplex,
.set_rate = sh_eth_set_rate_r8a777x,
.register_type = SH_ETH_REG_FAST_RCAR,
.ecsr_value = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
.ecsipr_value = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
.eesipr_value = 0x01ff009f,
.tx_check = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
.eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
EESR_ECI,
.fdr_value = 0x00000f0f,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.hw_swap = 1,
};
/* R8A7790/1 */
static struct sh_eth_cpu_data r8a779x_data = {
.set_duplex = sh_eth_set_duplex,
.set_rate = sh_eth_set_rate_r8a777x,
.register_type = SH_ETH_REG_FAST_RCAR,
.ecsr_value = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
.ecsipr_value = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
.eesipr_value = 0x01ff009f,
.tx_check = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
.eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
EESR_ECI,
.fdr_value = 0x00000f0f,
.trscer_err_mask = DESC_I_RINT8,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.hw_swap = 1,
.rmiimode = 1,
};
#endif /* CONFIG_OF */
static void sh_eth_set_rate_sh7724(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
switch (mdp->speed) {
case 10: /* 10BASE */
sh_eth_modify(ndev, ECMR, ECMR_RTM, 0);
break;
case 100:/* 100BASE */
sh_eth_modify(ndev, ECMR, ECMR_RTM, ECMR_RTM);
break;
}
}
/* SH7724 */
static struct sh_eth_cpu_data sh7724_data = {
.set_duplex = sh_eth_set_duplex,
.set_rate = sh_eth_set_rate_sh7724,
.register_type = SH_ETH_REG_FAST_SH4,
.ecsr_value = ECSR_PSRTO | ECSR_LCHNG | ECSR_ICD,
.ecsipr_value = ECSIPR_PSRTOIP | ECSIPR_LCHNGIP | ECSIPR_ICDIP,
.eesipr_value = 0x01ff009f,
.tx_check = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
.eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
EESR_ECI,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.hw_swap = 1,
.rpadir = 1,
.rpadir_value = 0x00020000, /* NET_IP_ALIGN assumed to be 2 */
};
static void sh_eth_set_rate_sh7757(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
switch (mdp->speed) {
case 10: /* 10BASE */
sh_eth_write(ndev, 0, RTRATE);
break;
case 100:/* 100BASE */
sh_eth_write(ndev, 1, RTRATE);
break;
}
}
/* SH7757 */
static struct sh_eth_cpu_data sh7757_data = {
.set_duplex = sh_eth_set_duplex,
.set_rate = sh_eth_set_rate_sh7757,
.register_type = SH_ETH_REG_FAST_SH4,
.eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
.tx_check = EESR_FTC | EESR_CND | EESR_DLC | EESR_CD | EESR_RTO,
.eesr_err_check = EESR_TWB | EESR_TABT | EESR_RABT | EESR_RFE |
EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
EESR_ECI,
.irq_flags = IRQF_SHARED,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.hw_swap = 1,
.no_ade = 1,
.rpadir = 1,
.rpadir_value = 2 << 16,
.rtrate = 1,
};
#define SH_GIGA_ETH_BASE 0xfee00000UL
#define GIGA_MALR(port) (SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c8)
#define GIGA_MAHR(port) (SH_GIGA_ETH_BASE + 0x800 * (port) + 0x05c0)
static void sh_eth_chip_reset_giga(struct net_device *ndev)
{
u32 mahr[2], malr[2];
int i;
/* save MAHR and MALR */
for (i = 0; i < 2; i++) {
malr[i] = ioread32((void *)GIGA_MALR(i));
mahr[i] = ioread32((void *)GIGA_MAHR(i));
}
sh_eth_chip_reset(ndev);
/* restore MAHR and MALR */
for (i = 0; i < 2; i++) {
iowrite32(malr[i], (void *)GIGA_MALR(i));
iowrite32(mahr[i], (void *)GIGA_MAHR(i));
}
}
static void sh_eth_set_rate_giga(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
switch (mdp->speed) {
case 10: /* 10BASE */
sh_eth_write(ndev, 0x00000000, GECMR);
break;
case 100:/* 100BASE */
sh_eth_write(ndev, 0x00000010, GECMR);
break;
case 1000: /* 1000BASE */
sh_eth_write(ndev, 0x00000020, GECMR);
break;
}
}
/* SH7757(GETHERC) */
static struct sh_eth_cpu_data sh7757_data_giga = {
.chip_reset = sh_eth_chip_reset_giga,
.set_duplex = sh_eth_set_duplex,
.set_rate = sh_eth_set_rate_giga,
.register_type = SH_ETH_REG_GIGABIT,
.ecsr_value = ECSR_ICD | ECSR_MPD,
.ecsipr_value = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
.eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
.tx_check = EESR_TC1 | EESR_FTC,
.eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
EESR_TDE | EESR_ECI,
.fdr_value = 0x0000072f,
.irq_flags = IRQF_SHARED,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.bculr = 1,
.hw_swap = 1,
.rpadir = 1,
.rpadir_value = 2 << 16,
.no_trimd = 1,
.no_ade = 1,
.tsu = 1,
};
/* SH7734 */
static struct sh_eth_cpu_data sh7734_data = {
.chip_reset = sh_eth_chip_reset,
.set_duplex = sh_eth_set_duplex,
.set_rate = sh_eth_set_rate_gether,
.register_type = SH_ETH_REG_GIGABIT,
.ecsr_value = ECSR_ICD | ECSR_MPD,
.ecsipr_value = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
.eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003f07ff,
.tx_check = EESR_TC1 | EESR_FTC,
.eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
EESR_RFE | EESR_RDE | EESR_RFRMER | EESR_TFE |
EESR_TDE | EESR_ECI,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.bculr = 1,
.hw_swap = 1,
.no_trimd = 1,
.no_ade = 1,
.tsu = 1,
.hw_crc = 1,
.select_mii = 1,
.shift_rd0 = 1,
};
/* SH7763 */
static struct sh_eth_cpu_data sh7763_data = {
.chip_reset = sh_eth_chip_reset,
.set_duplex = sh_eth_set_duplex,
.set_rate = sh_eth_set_rate_gether,
.register_type = SH_ETH_REG_GIGABIT,
.ecsr_value = ECSR_ICD | ECSR_MPD,
.ecsipr_value = ECSIPR_LCHNGIP | ECSIPR_ICDIP | ECSIPR_MPDIP,
.eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003f07ff,
.tx_check = EESR_TC1 | EESR_FTC,
.eesr_err_check = EESR_TWB1 | EESR_TWB | EESR_TABT | EESR_RABT |
EESR_RDE | EESR_RFRMER | EESR_TFE | EESR_TDE |
EESR_ECI,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.bculr = 1,
.hw_swap = 1,
.no_trimd = 1,
.no_ade = 1,
.tsu = 1,
.irq_flags = IRQF_SHARED,
};
static struct sh_eth_cpu_data sh7619_data = {
.register_type = SH_ETH_REG_FAST_SH3_SH2,
.eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
.apr = 1,
.mpr = 1,
.tpauser = 1,
.hw_swap = 1,
};
static struct sh_eth_cpu_data sh771x_data = {
.register_type = SH_ETH_REG_FAST_SH3_SH2,
.eesipr_value = DMAC_M_RFRMER | DMAC_M_ECI | 0x003fffff,
.tsu = 1,
};
static void sh_eth_set_default_cpu_data(struct sh_eth_cpu_data *cd)
{
if (!cd->ecsr_value)
cd->ecsr_value = DEFAULT_ECSR_INIT;
if (!cd->ecsipr_value)
cd->ecsipr_value = DEFAULT_ECSIPR_INIT;
if (!cd->fcftr_value)
cd->fcftr_value = DEFAULT_FIFO_F_D_RFF |
DEFAULT_FIFO_F_D_RFD;
if (!cd->fdr_value)
cd->fdr_value = DEFAULT_FDR_INIT;
if (!cd->tx_check)
cd->tx_check = DEFAULT_TX_CHECK;
if (!cd->eesr_err_check)
cd->eesr_err_check = DEFAULT_EESR_ERR_CHECK;
if (!cd->trscer_err_mask)
cd->trscer_err_mask = DEFAULT_TRSCER_ERR_MASK;
}
static int sh_eth_check_reset(struct net_device *ndev)
{
int ret = 0;
int cnt = 100;
while (cnt > 0) {
if (!(sh_eth_read(ndev, EDMR) & EDMR_SRST_GETHER))
break;
mdelay(1);
cnt--;
}
if (cnt <= 0) {
netdev_err(ndev, "Device reset failed\n");
ret = -ETIMEDOUT;
}
return ret;
}
static int sh_eth_reset(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int ret = 0;
if (sh_eth_is_gether(mdp) || sh_eth_is_rz_fast_ether(mdp)) {
sh_eth_write(ndev, EDSR_ENALL, EDSR);
sh_eth_modify(ndev, EDMR, EDMR_SRST_GETHER, EDMR_SRST_GETHER);
ret = sh_eth_check_reset(ndev);
if (ret)
return ret;
/* Table Init */
sh_eth_write(ndev, 0x0, TDLAR);
sh_eth_write(ndev, 0x0, TDFAR);
sh_eth_write(ndev, 0x0, TDFXR);
sh_eth_write(ndev, 0x0, TDFFR);
sh_eth_write(ndev, 0x0, RDLAR);
sh_eth_write(ndev, 0x0, RDFAR);
sh_eth_write(ndev, 0x0, RDFXR);
sh_eth_write(ndev, 0x0, RDFFR);
/* Reset HW CRC register */
if (mdp->cd->hw_crc)
sh_eth_write(ndev, 0x0, CSMR);
/* Select MII mode */
if (mdp->cd->select_mii)
sh_eth_select_mii(ndev);
} else {
sh_eth_modify(ndev, EDMR, EDMR_SRST_ETHER, EDMR_SRST_ETHER);
mdelay(3);
sh_eth_modify(ndev, EDMR, EDMR_SRST_ETHER, 0);
}
return ret;
}
static void sh_eth_set_receive_align(struct sk_buff *skb)
{
uintptr_t reserve = (uintptr_t)skb->data & (SH_ETH_RX_ALIGN - 1);
if (reserve)
skb_reserve(skb, SH_ETH_RX_ALIGN - reserve);
}
/* Program the hardware MAC address from dev->dev_addr. */
static void update_mac_address(struct net_device *ndev)
{
sh_eth_write(ndev,
(ndev->dev_addr[0] << 24) | (ndev->dev_addr[1] << 16) |
(ndev->dev_addr[2] << 8) | (ndev->dev_addr[3]), MAHR);
sh_eth_write(ndev,
(ndev->dev_addr[4] << 8) | (ndev->dev_addr[5]), MALR);
}
/* Get MAC address from SuperH MAC address register
*
* SuperH's Ethernet device doesn't have 'ROM' to MAC address.
* This driver get MAC address that use by bootloader(U-boot or sh-ipl+g).
* When you want use this device, you must set MAC address in bootloader.
*
*/
static void read_mac_address(struct net_device *ndev, unsigned char *mac)
{
if (mac[0] || mac[1] || mac[2] || mac[3] || mac[4] || mac[5]) {
memcpy(ndev->dev_addr, mac, ETH_ALEN);
} else {
u32 mahr = sh_eth_read(ndev, MAHR);
u32 malr = sh_eth_read(ndev, MALR);
ndev->dev_addr[0] = (mahr >> 24) & 0xFF;
ndev->dev_addr[1] = (mahr >> 16) & 0xFF;
ndev->dev_addr[2] = (mahr >> 8) & 0xFF;
ndev->dev_addr[3] = (mahr >> 0) & 0xFF;
ndev->dev_addr[4] = (malr >> 8) & 0xFF;
ndev->dev_addr[5] = (malr >> 0) & 0xFF;
}
}
static u32 sh_eth_get_edtrr_trns(struct sh_eth_private *mdp)
{
if (sh_eth_is_gether(mdp) || sh_eth_is_rz_fast_ether(mdp))
return EDTRR_TRNS_GETHER;
else
return EDTRR_TRNS_ETHER;
}
struct bb_info {
void (*set_gate)(void *addr);
struct mdiobb_ctrl ctrl;
void *addr;
};
static void sh_mdio_ctrl(struct mdiobb_ctrl *ctrl, u32 mask, int set)
{
struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
u32 pir;
if (bitbang->set_gate)
bitbang->set_gate(bitbang->addr);
pir = ioread32(bitbang->addr);
if (set)
pir |= mask;
else
pir &= ~mask;
iowrite32(pir, bitbang->addr);
}
/* Data I/O pin control */
static void sh_mmd_ctrl(struct mdiobb_ctrl *ctrl, int bit)
{
sh_mdio_ctrl(ctrl, PIR_MMD, bit);
}
/* Set bit data*/
static void sh_set_mdio(struct mdiobb_ctrl *ctrl, int bit)
{
sh_mdio_ctrl(ctrl, PIR_MDO, bit);
}
/* Get bit data*/
static int sh_get_mdio(struct mdiobb_ctrl *ctrl)
{
struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
if (bitbang->set_gate)
bitbang->set_gate(bitbang->addr);
return (ioread32(bitbang->addr) & PIR_MDI) != 0;
}
/* MDC pin control */
static void sh_mdc_ctrl(struct mdiobb_ctrl *ctrl, int bit)
{
sh_mdio_ctrl(ctrl, PIR_MDC, bit);
}
/* mdio bus control struct */
static struct mdiobb_ops bb_ops = {
.owner = THIS_MODULE,
.set_mdc = sh_mdc_ctrl,
.set_mdio_dir = sh_mmd_ctrl,
.set_mdio_data = sh_set_mdio,
.get_mdio_data = sh_get_mdio,
};
/* free Tx skb function */
static int sh_eth_tx_free(struct net_device *ndev, bool sent_only)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_txdesc *txdesc;
int free_num = 0;
int entry;
bool sent;
for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) {
entry = mdp->dirty_tx % mdp->num_tx_ring;
txdesc = &mdp->tx_ring[entry];
sent = !(txdesc->status & cpu_to_le32(TD_TACT));
if (sent_only && !sent)
break;
/* TACT bit must be checked before all the following reads */
dma_rmb();
netif_info(mdp, tx_done, ndev,
"tx entry %d status 0x%08x\n",
entry, le32_to_cpu(txdesc->status));
/* Free the original skb. */
if (mdp->tx_skbuff[entry]) {
dma_unmap_single(&ndev->dev, le32_to_cpu(txdesc->addr),
le32_to_cpu(txdesc->len) >> 16,
DMA_TO_DEVICE);
dev_kfree_skb_irq(mdp->tx_skbuff[entry]);
mdp->tx_skbuff[entry] = NULL;
free_num++;
}
txdesc->status = cpu_to_le32(TD_TFP);
if (entry >= mdp->num_tx_ring - 1)
txdesc->status |= cpu_to_le32(TD_TDLE);
if (sent) {
ndev->stats.tx_packets++;
ndev->stats.tx_bytes += le32_to_cpu(txdesc->len) >> 16;
}
}
return free_num;
}
/* free skb and descriptor buffer */
static void sh_eth_ring_free(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int ringsize, i;
if (mdp->rx_ring) {
for (i = 0; i < mdp->num_rx_ring; i++) {
if (mdp->rx_skbuff[i]) {
struct sh_eth_rxdesc *rxdesc = &mdp->rx_ring[i];
dma_unmap_single(&ndev->dev,
le32_to_cpu(rxdesc->addr),
ALIGN(mdp->rx_buf_sz, 32),
DMA_FROM_DEVICE);
}
}
ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring;
dma_free_coherent(NULL, ringsize, mdp->rx_ring,
mdp->rx_desc_dma);
mdp->rx_ring = NULL;
}
/* Free Rx skb ringbuffer */
if (mdp->rx_skbuff) {
for (i = 0; i < mdp->num_rx_ring; i++)
dev_kfree_skb(mdp->rx_skbuff[i]);
}
kfree(mdp->rx_skbuff);
mdp->rx_skbuff = NULL;
if (mdp->tx_ring) {
sh_eth_tx_free(ndev, false);
ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring;
dma_free_coherent(NULL, ringsize, mdp->tx_ring,
mdp->tx_desc_dma);
mdp->tx_ring = NULL;
}
/* Free Tx skb ringbuffer */
kfree(mdp->tx_skbuff);
mdp->tx_skbuff = NULL;
}
/* format skb and descriptor buffer */
static void sh_eth_ring_format(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int i;
struct sk_buff *skb;
struct sh_eth_rxdesc *rxdesc = NULL;
struct sh_eth_txdesc *txdesc = NULL;
int rx_ringsize = sizeof(*rxdesc) * mdp->num_rx_ring;
int tx_ringsize = sizeof(*txdesc) * mdp->num_tx_ring;
int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
dma_addr_t dma_addr;
u32 buf_len;
mdp->cur_rx = 0;
mdp->cur_tx = 0;
mdp->dirty_rx = 0;
mdp->dirty_tx = 0;
memset(mdp->rx_ring, 0, rx_ringsize);
/* build Rx ring buffer */
for (i = 0; i < mdp->num_rx_ring; i++) {
/* skb */
mdp->rx_skbuff[i] = NULL;
skb = netdev_alloc_skb(ndev, skbuff_size);
if (skb == NULL)
break;
sh_eth_set_receive_align(skb);
/* The size of the buffer is a multiple of 32 bytes. */
buf_len = ALIGN(mdp->rx_buf_sz, 32);
dma_addr = dma_map_single(&ndev->dev, skb->data, buf_len,
DMA_FROM_DEVICE);
if (dma_mapping_error(&ndev->dev, dma_addr)) {
kfree_skb(skb);
break;
}
mdp->rx_skbuff[i] = skb;
/* RX descriptor */
rxdesc = &mdp->rx_ring[i];
rxdesc->len = cpu_to_le32(buf_len << 16);
rxdesc->addr = cpu_to_le32(dma_addr);
rxdesc->status = cpu_to_le32(RD_RACT | RD_RFP);
/* Rx descriptor address set */
if (i == 0) {
sh_eth_write(ndev, mdp->rx_desc_dma, RDLAR);
if (sh_eth_is_gether(mdp) ||
sh_eth_is_rz_fast_ether(mdp))
sh_eth_write(ndev, mdp->rx_desc_dma, RDFAR);
}
}
mdp->dirty_rx = (u32) (i - mdp->num_rx_ring);
/* Mark the last entry as wrapping the ring. */
if (rxdesc)
rxdesc->status |= cpu_to_le32(RD_RDLE);
memset(mdp->tx_ring, 0, tx_ringsize);
/* build Tx ring buffer */
for (i = 0; i < mdp->num_tx_ring; i++) {
mdp->tx_skbuff[i] = NULL;
txdesc = &mdp->tx_ring[i];
txdesc->status = cpu_to_le32(TD_TFP);
txdesc->len = cpu_to_le32(0);
if (i == 0) {
/* Tx descriptor address set */
sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR);
if (sh_eth_is_gether(mdp) ||
sh_eth_is_rz_fast_ether(mdp))
sh_eth_write(ndev, mdp->tx_desc_dma, TDFAR);
}
}
txdesc->status |= cpu_to_le32(TD_TDLE);
}
/* Get skb and descriptor buffer */
static int sh_eth_ring_init(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int rx_ringsize, tx_ringsize;
/* +26 gets the maximum ethernet encapsulation, +7 & ~7 because the
* card needs room to do 8 byte alignment, +2 so we can reserve
* the first 2 bytes, and +16 gets room for the status word from the
* card.
*/
mdp->rx_buf_sz = (ndev->mtu <= 1492 ? PKT_BUF_SZ :
(((ndev->mtu + 26 + 7) & ~7) + 2 + 16));
if (mdp->cd->rpadir)
mdp->rx_buf_sz += NET_IP_ALIGN;
/* Allocate RX and TX skb rings */
mdp->rx_skbuff = kcalloc(mdp->num_rx_ring, sizeof(*mdp->rx_skbuff),
GFP_KERNEL);
if (!mdp->rx_skbuff)
return -ENOMEM;
mdp->tx_skbuff = kcalloc(mdp->num_tx_ring, sizeof(*mdp->tx_skbuff),
GFP_KERNEL);
if (!mdp->tx_skbuff)
goto ring_free;
/* Allocate all Rx descriptors. */
rx_ringsize = sizeof(struct sh_eth_rxdesc) * mdp->num_rx_ring;
mdp->rx_ring = dma_alloc_coherent(NULL, rx_ringsize, &mdp->rx_desc_dma,
GFP_KERNEL);
if (!mdp->rx_ring)
goto ring_free;
mdp->dirty_rx = 0;
/* Allocate all Tx descriptors. */
tx_ringsize = sizeof(struct sh_eth_txdesc) * mdp->num_tx_ring;
mdp->tx_ring = dma_alloc_coherent(NULL, tx_ringsize, &mdp->tx_desc_dma,
GFP_KERNEL);
if (!mdp->tx_ring)
goto ring_free;
return 0;
ring_free:
/* Free Rx and Tx skb ring buffer and DMA buffer */
sh_eth_ring_free(ndev);
return -ENOMEM;
}
static int sh_eth_dev_init(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int ret;
/* Soft Reset */
ret = sh_eth_reset(ndev);
if (ret)
return ret;
if (mdp->cd->rmiimode)
sh_eth_write(ndev, 0x1, RMIIMODE);
/* Descriptor format */
sh_eth_ring_format(ndev);
if (mdp->cd->rpadir)
sh_eth_write(ndev, mdp->cd->rpadir_value, RPADIR);
/* all sh_eth int mask */
sh_eth_write(ndev, 0, EESIPR);
#if defined(__LITTLE_ENDIAN)
if (mdp->cd->hw_swap)
sh_eth_write(ndev, EDMR_EL, EDMR);
else
#endif
sh_eth_write(ndev, 0, EDMR);
/* FIFO size set */
sh_eth_write(ndev, mdp->cd->fdr_value, FDR);
sh_eth_write(ndev, 0, TFTR);
/* Frame recv control (enable multiple-packets per rx irq) */
sh_eth_write(ndev, RMCR_RNC, RMCR);
sh_eth_write(ndev, mdp->cd->trscer_err_mask, TRSCER);
if (mdp->cd->bculr)
sh_eth_write(ndev, 0x800, BCULR); /* Burst sycle set */
sh_eth_write(ndev, mdp->cd->fcftr_value, FCFTR);
if (!mdp->cd->no_trimd)
sh_eth_write(ndev, 0, TRIMD);
/* Recv frame limit set register */
sh_eth_write(ndev, ndev->mtu + ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN,
RFLR);
sh_eth_modify(ndev, EESR, 0, 0);
mdp->irq_enabled = true;
sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
/* PAUSE Prohibition */
sh_eth_write(ndev, ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) |
ECMR_TE | ECMR_RE, ECMR);
if (mdp->cd->set_rate)
mdp->cd->set_rate(ndev);
/* E-MAC Status Register clear */
sh_eth_write(ndev, mdp->cd->ecsr_value, ECSR);
/* E-MAC Interrupt Enable register */
sh_eth_write(ndev, mdp->cd->ecsipr_value, ECSIPR);
/* Set MAC address */
update_mac_address(ndev);
/* mask reset */
if (mdp->cd->apr)
sh_eth_write(ndev, APR_AP, APR);
if (mdp->cd->mpr)
sh_eth_write(ndev, MPR_MP, MPR);
if (mdp->cd->tpauser)
sh_eth_write(ndev, TPAUSER_UNLIMITED, TPAUSER);
/* Setting the Rx mode will start the Rx process. */
sh_eth_write(ndev, EDRRR_R, EDRRR);
return ret;
}
static void sh_eth_dev_exit(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int i;
/* Deactivate all TX descriptors, so DMA should stop at next
* packet boundary if it's currently running
*/
for (i = 0; i < mdp->num_tx_ring; i++)
mdp->tx_ring[i].status &= ~cpu_to_le32(TD_TACT);
/* Disable TX FIFO egress to MAC */
sh_eth_rcv_snd_disable(ndev);
/* Stop RX DMA at next packet boundary */
sh_eth_write(ndev, 0, EDRRR);
/* Aside from TX DMA, we can't tell when the hardware is
* really stopped, so we need to reset to make sure.
* Before doing that, wait for long enough to *probably*
* finish transmitting the last packet and poll stats.
*/
msleep(2); /* max frame time at 10 Mbps < 1250 us */
sh_eth_get_stats(ndev);
sh_eth_reset(ndev);
/* Set the RMII mode again if required */
if (mdp->cd->rmiimode)
sh_eth_write(ndev, 0x1, RMIIMODE);
/* Set MAC address again */
update_mac_address(ndev);
}
/* Packet receive function */
static int sh_eth_rx(struct net_device *ndev, u32 intr_status, int *quota)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_rxdesc *rxdesc;
int entry = mdp->cur_rx % mdp->num_rx_ring;
int boguscnt = (mdp->dirty_rx + mdp->num_rx_ring) - mdp->cur_rx;
int limit;
struct sk_buff *skb;
u32 desc_status;
int skbuff_size = mdp->rx_buf_sz + SH_ETH_RX_ALIGN + 32 - 1;
dma_addr_t dma_addr;
u16 pkt_len;
u32 buf_len;
boguscnt = min(boguscnt, *quota);
limit = boguscnt;
rxdesc = &mdp->rx_ring[entry];
while (!(rxdesc->status & cpu_to_le32(RD_RACT))) {
/* RACT bit must be checked before all the following reads */
dma_rmb();
desc_status = le32_to_cpu(rxdesc->status);
pkt_len = le32_to_cpu(rxdesc->len) & RD_RFL;
if (--boguscnt < 0)
break;
netif_info(mdp, rx_status, ndev,
"rx entry %d status 0x%08x len %d\n",
entry, desc_status, pkt_len);
if (!(desc_status & RDFEND))
ndev->stats.rx_length_errors++;
/* In case of almost all GETHER/ETHERs, the Receive Frame State
* (RFS) bits in the Receive Descriptor 0 are from bit 9 to
* bit 0. However, in case of the R8A7740 and R7S72100
* the RFS bits are from bit 25 to bit 16. So, the
* driver needs right shifting by 16.
*/
if (mdp->cd->shift_rd0)
desc_status >>= 16;
skb = mdp->rx_skbuff[entry];
if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 |
RD_RFS5 | RD_RFS6 | RD_RFS10)) {
ndev->stats.rx_errors++;
if (desc_status & RD_RFS1)
ndev->stats.rx_crc_errors++;
if (desc_status & RD_RFS2)
ndev->stats.rx_frame_errors++;
if (desc_status & RD_RFS3)
ndev->stats.rx_length_errors++;
if (desc_status & RD_RFS4)
ndev->stats.rx_length_errors++;
if (desc_status & RD_RFS6)
ndev->stats.rx_missed_errors++;
if (desc_status & RD_RFS10)
ndev->stats.rx_over_errors++;
} else if (skb) {
dma_addr = le32_to_cpu(rxdesc->addr);
if (!mdp->cd->hw_swap)
sh_eth_soft_swap(
phys_to_virt(ALIGN(dma_addr, 4)),
pkt_len + 2);
mdp->rx_skbuff[entry] = NULL;
if (mdp->cd->rpadir)
skb_reserve(skb, NET_IP_ALIGN);
dma_unmap_single(&ndev->dev, dma_addr,
ALIGN(mdp->rx_buf_sz, 32),
DMA_FROM_DEVICE);
skb_put(skb, pkt_len);
skb->protocol = eth_type_trans(skb, ndev);
netif_receive_skb(skb);
ndev->stats.rx_packets++;
ndev->stats.rx_bytes += pkt_len;
if (desc_status & RD_RFS8)
ndev->stats.multicast++;
}
entry = (++mdp->cur_rx) % mdp->num_rx_ring;
rxdesc = &mdp->rx_ring[entry];
}
/* Refill the Rx ring buffers. */
for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) {
entry = mdp->dirty_rx % mdp->num_rx_ring;
rxdesc = &mdp->rx_ring[entry];
/* The size of the buffer is 32 byte boundary. */
buf_len = ALIGN(mdp->rx_buf_sz, 32);
rxdesc->len = cpu_to_le32(buf_len << 16);
if (mdp->rx_skbuff[entry] == NULL) {
skb = netdev_alloc_skb(ndev, skbuff_size);
if (skb == NULL)
break; /* Better luck next round. */
sh_eth_set_receive_align(skb);
dma_addr = dma_map_single(&ndev->dev, skb->data,
buf_len, DMA_FROM_DEVICE);
if (dma_mapping_error(&ndev->dev, dma_addr)) {
kfree_skb(skb);
break;
}
mdp->rx_skbuff[entry] = skb;
skb_checksum_none_assert(skb);
rxdesc->addr = cpu_to_le32(dma_addr);
}
dma_wmb(); /* RACT bit must be set after all the above writes */
if (entry >= mdp->num_rx_ring - 1)
rxdesc->status |=
cpu_to_le32(RD_RACT | RD_RFP | RD_RDLE);
else
rxdesc->status |= cpu_to_le32(RD_RACT | RD_RFP);
}
/* Restart Rx engine if stopped. */
/* If we don't need to check status, don't. -KDU */
if (!(sh_eth_read(ndev, EDRRR) & EDRRR_R)) {
/* fix the values for the next receiving if RDE is set */
if (intr_status & EESR_RDE &&
mdp->reg_offset[RDFAR] != SH_ETH_OFFSET_INVALID) {
u32 count = (sh_eth_read(ndev, RDFAR) -
sh_eth_read(ndev, RDLAR)) >> 4;
mdp->cur_rx = count;
mdp->dirty_rx = count;
}
sh_eth_write(ndev, EDRRR_R, EDRRR);
}
*quota -= limit - boguscnt - 1;
return *quota <= 0;
}
static void sh_eth_rcv_snd_disable(struct net_device *ndev)
{
/* disable tx and rx */
sh_eth_modify(ndev, ECMR, ECMR_RE | ECMR_TE, 0);
}
static void sh_eth_rcv_snd_enable(struct net_device *ndev)
{
/* enable tx and rx */
sh_eth_modify(ndev, ECMR, ECMR_RE | ECMR_TE, ECMR_RE | ECMR_TE);
}
/* error control function */
static void sh_eth_error(struct net_device *ndev, u32 intr_status)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 felic_stat;
u32 link_stat;
u32 mask;
if (intr_status & EESR_ECI) {
felic_stat = sh_eth_read(ndev, ECSR);
sh_eth_write(ndev, felic_stat, ECSR); /* clear int */
if (felic_stat & ECSR_ICD)
ndev->stats.tx_carrier_errors++;
if (felic_stat & ECSR_LCHNG) {
/* Link Changed */
if (mdp->cd->no_psr || mdp->no_ether_link) {
goto ignore_link;
} else {
link_stat = (sh_eth_read(ndev, PSR));
if (mdp->ether_link_active_low)
link_stat = ~link_stat;
}
if (!(link_stat & PHY_ST_LINK)) {
sh_eth_rcv_snd_disable(ndev);
} else {
/* Link Up */
sh_eth_modify(ndev, EESIPR, DMAC_M_ECI, 0);
/* clear int */
sh_eth_modify(ndev, ECSR, 0, 0);
sh_eth_modify(ndev, EESIPR, DMAC_M_ECI,
DMAC_M_ECI);
/* enable tx and rx */
sh_eth_rcv_snd_enable(ndev);
}
}
}
ignore_link:
if (intr_status & EESR_TWB) {
/* Unused write back interrupt */
if (intr_status & EESR_TABT) { /* Transmit Abort int */
ndev->stats.tx_aborted_errors++;
netif_err(mdp, tx_err, ndev, "Transmit Abort\n");
}
}
if (intr_status & EESR_RABT) {
/* Receive Abort int */
if (intr_status & EESR_RFRMER) {
/* Receive Frame Overflow int */
ndev->stats.rx_frame_errors++;
}
}
if (intr_status & EESR_TDE) {
/* Transmit Descriptor Empty int */
ndev->stats.tx_fifo_errors++;
netif_err(mdp, tx_err, ndev, "Transmit Descriptor Empty\n");
}
if (intr_status & EESR_TFE) {
/* FIFO under flow */
ndev->stats.tx_fifo_errors++;
netif_err(mdp, tx_err, ndev, "Transmit FIFO Under flow\n");
}
if (intr_status & EESR_RDE) {
/* Receive Descriptor Empty int */
ndev->stats.rx_over_errors++;
}
if (intr_status & EESR_RFE) {
/* Receive FIFO Overflow int */
ndev->stats.rx_fifo_errors++;
}
if (!mdp->cd->no_ade && (intr_status & EESR_ADE)) {
/* Address Error */
ndev->stats.tx_fifo_errors++;
netif_err(mdp, tx_err, ndev, "Address Error\n");
}
mask = EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE;
if (mdp->cd->no_ade)
mask &= ~EESR_ADE;
if (intr_status & mask) {
/* Tx error */
u32 edtrr = sh_eth_read(ndev, EDTRR);
/* dmesg */
netdev_err(ndev, "TX error. status=%8.8x cur_tx=%8.8x dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
intr_status, mdp->cur_tx, mdp->dirty_tx,
(u32)ndev->state, edtrr);
/* dirty buffer free */
sh_eth_tx_free(ndev, true);
/* SH7712 BUG */
if (edtrr ^ sh_eth_get_edtrr_trns(mdp)) {
/* tx dma start */
sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
}
/* wakeup */
netif_wake_queue(ndev);
}
}
static irqreturn_t sh_eth_interrupt(int irq, void *netdev)
{
struct net_device *ndev = netdev;
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_cpu_data *cd = mdp->cd;
irqreturn_t ret = IRQ_NONE;
u32 intr_status, intr_enable;
spin_lock(&mdp->lock);
/* Get interrupt status */
intr_status = sh_eth_read(ndev, EESR);
/* Mask it with the interrupt mask, forcing ECI interrupt to be always
* enabled since it's the one that comes thru regardless of the mask,
* and we need to fully handle it in sh_eth_error() in order to quench
* it as it doesn't get cleared by just writing 1 to the ECI bit...
*/
intr_enable = sh_eth_read(ndev, EESIPR);
intr_status &= intr_enable | DMAC_M_ECI;
if (intr_status & (EESR_RX_CHECK | cd->tx_check | cd->eesr_err_check))
ret = IRQ_HANDLED;
else
goto out;
if (!likely(mdp->irq_enabled)) {
sh_eth_write(ndev, 0, EESIPR);
goto out;
}
if (intr_status & EESR_RX_CHECK) {
if (napi_schedule_prep(&mdp->napi)) {
/* Mask Rx interrupts */
sh_eth_write(ndev, intr_enable & ~EESR_RX_CHECK,
EESIPR);
__napi_schedule(&mdp->napi);
} else {
netdev_warn(ndev,
"ignoring interrupt, status 0x%08x, mask 0x%08x.\n",
intr_status, intr_enable);
}
}
/* Tx Check */
if (intr_status & cd->tx_check) {
/* Clear Tx interrupts */
sh_eth_write(ndev, intr_status & cd->tx_check, EESR);
sh_eth_tx_free(ndev, true);
netif_wake_queue(ndev);
}
if (intr_status & cd->eesr_err_check) {
/* Clear error interrupts */
sh_eth_write(ndev, intr_status & cd->eesr_err_check, EESR);
sh_eth_error(ndev, intr_status);
}
out:
spin_unlock(&mdp->lock);
return ret;
}
static int sh_eth_poll(struct napi_struct *napi, int budget)
{
struct sh_eth_private *mdp = container_of(napi, struct sh_eth_private,
napi);
struct net_device *ndev = napi->dev;
int quota = budget;
u32 intr_status;
for (;;) {
intr_status = sh_eth_read(ndev, EESR);
if (!(intr_status & EESR_RX_CHECK))
break;
/* Clear Rx interrupts */
sh_eth_write(ndev, intr_status & EESR_RX_CHECK, EESR);
if (sh_eth_rx(ndev, intr_status, &quota))
goto out;
}
napi_complete(napi);
/* Reenable Rx interrupts */
if (mdp->irq_enabled)
sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR);
out:
return budget - quota;
}
/* PHY state control function */
static void sh_eth_adjust_link(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct phy_device *phydev = ndev->phydev;
unsigned long flags;
int new_state = 0;
spin_lock_irqsave(&mdp->lock, flags);
/* Disable TX and RX right over here, if E-MAC change is ignored */
if (mdp->cd->no_psr || mdp->no_ether_link)
sh_eth_rcv_snd_disable(ndev);
if (phydev->link) {
if (phydev->duplex != mdp->duplex) {
new_state = 1;
mdp->duplex = phydev->duplex;
if (mdp->cd->set_duplex)
mdp->cd->set_duplex(ndev);
}
if (phydev->speed != mdp->speed) {
new_state = 1;
mdp->speed = phydev->speed;
if (mdp->cd->set_rate)
mdp->cd->set_rate(ndev);
}
if (!mdp->link) {
sh_eth_modify(ndev, ECMR, ECMR_TXF, 0);
new_state = 1;
mdp->link = phydev->link;
}
} else if (mdp->link) {
new_state = 1;
mdp->link = 0;
mdp->speed = 0;
mdp->duplex = -1;
}
/* Enable TX and RX right over here, if E-MAC change is ignored */
if ((mdp->cd->no_psr || mdp->no_ether_link) && phydev->link)
sh_eth_rcv_snd_enable(ndev);
mmiowb();
spin_unlock_irqrestore(&mdp->lock, flags);
if (new_state && netif_msg_link(mdp))
phy_print_status(phydev);
}
/* PHY init function */
static int sh_eth_phy_init(struct net_device *ndev)
{
struct device_node *np = ndev->dev.parent->of_node;
struct sh_eth_private *mdp = netdev_priv(ndev);
struct phy_device *phydev;
mdp->link = 0;
mdp->speed = 0;
mdp->duplex = -1;
/* Try connect to PHY */
if (np) {
struct device_node *pn;
pn = of_parse_phandle(np, "phy-handle", 0);
phydev = of_phy_connect(ndev, pn,
sh_eth_adjust_link, 0,
mdp->phy_interface);
of_node_put(pn);
if (!phydev)
phydev = ERR_PTR(-ENOENT);
} else {
char phy_id[MII_BUS_ID_SIZE + 3];
snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT,
mdp->mii_bus->id, mdp->phy_id);
phydev = phy_connect(ndev, phy_id, sh_eth_adjust_link,
mdp->phy_interface);
}
if (IS_ERR(phydev)) {
netdev_err(ndev, "failed to connect PHY\n");
return PTR_ERR(phydev);
}
phy_attached_info(phydev);
return 0;
}
/* PHY control start function */
static int sh_eth_phy_start(struct net_device *ndev)
{
int ret;
ret = sh_eth_phy_init(ndev);
if (ret)
return ret;
phy_start(ndev->phydev);
return 0;
}
static int sh_eth_get_link_ksettings(struct net_device *ndev,
struct ethtool_link_ksettings *cmd)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
unsigned long flags;
int ret;
if (!ndev->phydev)
return -ENODEV;
spin_lock_irqsave(&mdp->lock, flags);
ret = phy_ethtool_ksettings_get(ndev->phydev, cmd);
spin_unlock_irqrestore(&mdp->lock, flags);
return ret;
}
static int sh_eth_set_link_ksettings(struct net_device *ndev,
const struct ethtool_link_ksettings *cmd)
{
if (!ndev->phydev)
return -ENODEV;
return phy_ethtool_ksettings_set(ndev->phydev, cmd);
}
/* If it is ever necessary to increase SH_ETH_REG_DUMP_MAX_REGS, the
* version must be bumped as well. Just adding registers up to that
* limit is fine, as long as the existing register indices don't
* change.
*/
#define SH_ETH_REG_DUMP_VERSION 1
#define SH_ETH_REG_DUMP_MAX_REGS 256
static size_t __sh_eth_get_regs(struct net_device *ndev, u32 *buf)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_cpu_data *cd = mdp->cd;
u32 *valid_map;
size_t len;
BUILD_BUG_ON(SH_ETH_MAX_REGISTER_OFFSET > SH_ETH_REG_DUMP_MAX_REGS);
/* Dump starts with a bitmap that tells ethtool which
* registers are defined for this chip.
*/
len = DIV_ROUND_UP(SH_ETH_REG_DUMP_MAX_REGS, 32);
if (buf) {
valid_map = buf;
buf += len;
} else {
valid_map = NULL;
}
/* Add a register to the dump, if it has a defined offset.
* This automatically skips most undefined registers, but for
* some it is also necessary to check a capability flag in
* struct sh_eth_cpu_data.
*/
#define mark_reg_valid(reg) valid_map[reg / 32] |= 1U << (reg % 32)
#define add_reg_from(reg, read_expr) do { \
if (mdp->reg_offset[reg] != SH_ETH_OFFSET_INVALID) { \
if (buf) { \
mark_reg_valid(reg); \
*buf++ = read_expr; \
} \
++len; \
} \
} while (0)
#define add_reg(reg) add_reg_from(reg, sh_eth_read(ndev, reg))
#define add_tsu_reg(reg) add_reg_from(reg, sh_eth_tsu_read(mdp, reg))
add_reg(EDSR);
add_reg(EDMR);
add_reg(EDTRR);
add_reg(EDRRR);
add_reg(EESR);
add_reg(EESIPR);
add_reg(TDLAR);
add_reg(TDFAR);
add_reg(TDFXR);
add_reg(TDFFR);
add_reg(RDLAR);
add_reg(RDFAR);
add_reg(RDFXR);
add_reg(RDFFR);
add_reg(TRSCER);
add_reg(RMFCR);
add_reg(TFTR);
add_reg(FDR);
add_reg(RMCR);
add_reg(TFUCR);
add_reg(RFOCR);
if (cd->rmiimode)
add_reg(RMIIMODE);
add_reg(FCFTR);
if (cd->rpadir)
add_reg(RPADIR);
if (!cd->no_trimd)
add_reg(TRIMD);
add_reg(ECMR);
add_reg(ECSR);
add_reg(ECSIPR);
add_reg(PIR);
if (!cd->no_psr)
add_reg(PSR);
add_reg(RDMLR);
add_reg(RFLR);
add_reg(IPGR);
if (cd->apr)
add_reg(APR);
if (cd->mpr)
add_reg(MPR);
add_reg(RFCR);
add_reg(RFCF);
if (cd->tpauser)
add_reg(TPAUSER);
add_reg(TPAUSECR);
add_reg(GECMR);
if (cd->bculr)
add_reg(BCULR);
add_reg(MAHR);
add_reg(MALR);
add_reg(TROCR);
add_reg(CDCR);
add_reg(LCCR);
add_reg(CNDCR);
add_reg(CEFCR);
add_reg(FRECR);
add_reg(TSFRCR);
add_reg(TLFRCR);
add_reg(CERCR);
add_reg(CEECR);
add_reg(MAFCR);
if (cd->rtrate)
add_reg(RTRATE);
if (cd->hw_crc)
add_reg(CSMR);
if (cd->select_mii)
add_reg(RMII_MII);
add_reg(ARSTR);
if (cd->tsu) {
add_tsu_reg(TSU_CTRST);
add_tsu_reg(TSU_FWEN0);
add_tsu_reg(TSU_FWEN1);
add_tsu_reg(TSU_FCM);
add_tsu_reg(TSU_BSYSL0);
add_tsu_reg(TSU_BSYSL1);
add_tsu_reg(TSU_PRISL0);
add_tsu_reg(TSU_PRISL1);
add_tsu_reg(TSU_FWSL0);
add_tsu_reg(TSU_FWSL1);
add_tsu_reg(TSU_FWSLC);
add_tsu_reg(TSU_QTAG0);
add_tsu_reg(TSU_QTAG1);
add_tsu_reg(TSU_QTAGM0);
add_tsu_reg(TSU_QTAGM1);
add_tsu_reg(TSU_FWSR);
add_tsu_reg(TSU_FWINMK);
add_tsu_reg(TSU_ADQT0);
add_tsu_reg(TSU_ADQT1);
add_tsu_reg(TSU_VTAG0);
add_tsu_reg(TSU_VTAG1);
add_tsu_reg(TSU_ADSBSY);
add_tsu_reg(TSU_TEN);
add_tsu_reg(TSU_POST1);
add_tsu_reg(TSU_POST2);
add_tsu_reg(TSU_POST3);
add_tsu_reg(TSU_POST4);
if (mdp->reg_offset[TSU_ADRH0] != SH_ETH_OFFSET_INVALID) {
/* This is the start of a table, not just a single
* register.
*/
if (buf) {
unsigned int i;
mark_reg_valid(TSU_ADRH0);
for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES * 2; i++)
*buf++ = ioread32(
mdp->tsu_addr +
mdp->reg_offset[TSU_ADRH0] +
i * 4);
}
len += SH_ETH_TSU_CAM_ENTRIES * 2;
}
}
#undef mark_reg_valid
#undef add_reg_from
#undef add_reg
#undef add_tsu_reg
return len * 4;
}
static int sh_eth_get_regs_len(struct net_device *ndev)
{
return __sh_eth_get_regs(ndev, NULL);
}
static void sh_eth_get_regs(struct net_device *ndev, struct ethtool_regs *regs,
void *buf)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
regs->version = SH_ETH_REG_DUMP_VERSION;
pm_runtime_get_sync(&mdp->pdev->dev);
__sh_eth_get_regs(ndev, buf);
pm_runtime_put_sync(&mdp->pdev->dev);
}
static int sh_eth_nway_reset(struct net_device *ndev)
{
if (!ndev->phydev)
return -ENODEV;
return phy_start_aneg(ndev->phydev);
}
static u32 sh_eth_get_msglevel(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
return mdp->msg_enable;
}
static void sh_eth_set_msglevel(struct net_device *ndev, u32 value)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
mdp->msg_enable = value;
}
static const char sh_eth_gstrings_stats[][ETH_GSTRING_LEN] = {
"rx_current", "tx_current",
"rx_dirty", "tx_dirty",
};
#define SH_ETH_STATS_LEN ARRAY_SIZE(sh_eth_gstrings_stats)
static int sh_eth_get_sset_count(struct net_device *netdev, int sset)
{
switch (sset) {
case ETH_SS_STATS:
return SH_ETH_STATS_LEN;
default:
return -EOPNOTSUPP;
}
}
static void sh_eth_get_ethtool_stats(struct net_device *ndev,
struct ethtool_stats *stats, u64 *data)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int i = 0;
/* device-specific stats */
data[i++] = mdp->cur_rx;
data[i++] = mdp->cur_tx;
data[i++] = mdp->dirty_rx;
data[i++] = mdp->dirty_tx;
}
static void sh_eth_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
{
switch (stringset) {
case ETH_SS_STATS:
memcpy(data, *sh_eth_gstrings_stats,
sizeof(sh_eth_gstrings_stats));
break;
}
}
static void sh_eth_get_ringparam(struct net_device *ndev,
struct ethtool_ringparam *ring)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
ring->rx_max_pending = RX_RING_MAX;
ring->tx_max_pending = TX_RING_MAX;
ring->rx_pending = mdp->num_rx_ring;
ring->tx_pending = mdp->num_tx_ring;
}
static int sh_eth_set_ringparam(struct net_device *ndev,
struct ethtool_ringparam *ring)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int ret;
if (ring->tx_pending > TX_RING_MAX ||
ring->rx_pending > RX_RING_MAX ||
ring->tx_pending < TX_RING_MIN ||
ring->rx_pending < RX_RING_MIN)
return -EINVAL;
if (ring->rx_mini_pending || ring->rx_jumbo_pending)
return -EINVAL;
if (netif_running(ndev)) {
netif_device_detach(ndev);
netif_tx_disable(ndev);
/* Serialise with the interrupt handler and NAPI, then
* disable interrupts. We have to clear the
* irq_enabled flag first to ensure that interrupts
* won't be re-enabled.
*/
mdp->irq_enabled = false;
synchronize_irq(ndev->irq);
napi_synchronize(&mdp->napi);
sh_eth_write(ndev, 0x0000, EESIPR);
sh_eth_dev_exit(ndev);
/* Free all the skbuffs in the Rx queue and the DMA buffers. */
sh_eth_ring_free(ndev);
}
/* Set new parameters */
mdp->num_rx_ring = ring->rx_pending;
mdp->num_tx_ring = ring->tx_pending;
if (netif_running(ndev)) {
ret = sh_eth_ring_init(ndev);
if (ret < 0) {
netdev_err(ndev, "%s: sh_eth_ring_init failed.\n",
__func__);
return ret;
}
ret = sh_eth_dev_init(ndev);
if (ret < 0) {
netdev_err(ndev, "%s: sh_eth_dev_init failed.\n",
__func__);
return ret;
}
netif_device_attach(ndev);
}
return 0;
}
static const struct ethtool_ops sh_eth_ethtool_ops = {
.get_regs_len = sh_eth_get_regs_len,
.get_regs = sh_eth_get_regs,
.nway_reset = sh_eth_nway_reset,
.get_msglevel = sh_eth_get_msglevel,
.set_msglevel = sh_eth_set_msglevel,
.get_link = ethtool_op_get_link,
.get_strings = sh_eth_get_strings,
.get_ethtool_stats = sh_eth_get_ethtool_stats,
.get_sset_count = sh_eth_get_sset_count,
.get_ringparam = sh_eth_get_ringparam,
.set_ringparam = sh_eth_set_ringparam,
.get_link_ksettings = sh_eth_get_link_ksettings,
.set_link_ksettings = sh_eth_set_link_ksettings,
};
/* network device open function */
static int sh_eth_open(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int ret;
pm_runtime_get_sync(&mdp->pdev->dev);
napi_enable(&mdp->napi);
ret = request_irq(ndev->irq, sh_eth_interrupt,
mdp->cd->irq_flags, ndev->name, ndev);
if (ret) {
netdev_err(ndev, "Can not assign IRQ number\n");
goto out_napi_off;
}
/* Descriptor set */
ret = sh_eth_ring_init(ndev);
if (ret)
goto out_free_irq;
/* device init */
ret = sh_eth_dev_init(ndev);
if (ret)
goto out_free_irq;
/* PHY control start*/
ret = sh_eth_phy_start(ndev);
if (ret)
goto out_free_irq;
netif_start_queue(ndev);
mdp->is_opened = 1;
return ret;
out_free_irq:
free_irq(ndev->irq, ndev);
out_napi_off:
napi_disable(&mdp->napi);
pm_runtime_put_sync(&mdp->pdev->dev);
return ret;
}
/* Timeout function */
static void sh_eth_tx_timeout(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_rxdesc *rxdesc;
int i;
netif_stop_queue(ndev);
netif_err(mdp, timer, ndev,
"transmit timed out, status %8.8x, resetting...\n",
sh_eth_read(ndev, EESR));
/* tx_errors count up */
ndev->stats.tx_errors++;
/* Free all the skbuffs in the Rx queue. */
for (i = 0; i < mdp->num_rx_ring; i++) {
rxdesc = &mdp->rx_ring[i];
rxdesc->status = cpu_to_le32(0);
rxdesc->addr = cpu_to_le32(0xBADF00D0);
dev_kfree_skb(mdp->rx_skbuff[i]);
mdp->rx_skbuff[i] = NULL;
}
for (i = 0; i < mdp->num_tx_ring; i++) {
dev_kfree_skb(mdp->tx_skbuff[i]);
mdp->tx_skbuff[i] = NULL;
}
/* device init */
sh_eth_dev_init(ndev);
netif_start_queue(ndev);
}
/* Packet transmit function */
static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct sh_eth_txdesc *txdesc;
dma_addr_t dma_addr;
u32 entry;
unsigned long flags;
spin_lock_irqsave(&mdp->lock, flags);
if ((mdp->cur_tx - mdp->dirty_tx) >= (mdp->num_tx_ring - 4)) {
if (!sh_eth_tx_free(ndev, true)) {
netif_warn(mdp, tx_queued, ndev, "TxFD exhausted.\n");
netif_stop_queue(ndev);
spin_unlock_irqrestore(&mdp->lock, flags);
return NETDEV_TX_BUSY;
}
}
spin_unlock_irqrestore(&mdp->lock, flags);
if (skb_put_padto(skb, ETH_ZLEN))
return NETDEV_TX_OK;
entry = mdp->cur_tx % mdp->num_tx_ring;
mdp->tx_skbuff[entry] = skb;
txdesc = &mdp->tx_ring[entry];
/* soft swap. */
if (!mdp->cd->hw_swap)
sh_eth_soft_swap(PTR_ALIGN(skb->data, 4), skb->len + 2);
dma_addr = dma_map_single(&ndev->dev, skb->data, skb->len,
DMA_TO_DEVICE);
if (dma_mapping_error(&ndev->dev, dma_addr)) {
kfree_skb(skb);
return NETDEV_TX_OK;
}
txdesc->addr = cpu_to_le32(dma_addr);
txdesc->len = cpu_to_le32(skb->len << 16);
dma_wmb(); /* TACT bit must be set after all the above writes */
if (entry >= mdp->num_tx_ring - 1)
txdesc->status |= cpu_to_le32(TD_TACT | TD_TDLE);
else
txdesc->status |= cpu_to_le32(TD_TACT);
mdp->cur_tx++;
if (!(sh_eth_read(ndev, EDTRR) & sh_eth_get_edtrr_trns(mdp)))
sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
return NETDEV_TX_OK;
}
/* The statistics registers have write-clear behaviour, which means we
* will lose any increment between the read and write. We mitigate
* this by only clearing when we read a non-zero value, so we will
* never falsely report a total of zero.
*/
static void
sh_eth_update_stat(struct net_device *ndev, unsigned long *stat, int reg)
{
u32 delta = sh_eth_read(ndev, reg);
if (delta) {
*stat += delta;
sh_eth_write(ndev, 0, reg);
}
}
static struct net_device_stats *sh_eth_get_stats(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
if (sh_eth_is_rz_fast_ether(mdp))
return &ndev->stats;
if (!mdp->is_opened)
return &ndev->stats;
sh_eth_update_stat(ndev, &ndev->stats.tx_dropped, TROCR);
sh_eth_update_stat(ndev, &ndev->stats.collisions, CDCR);
sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors, LCCR);
if (sh_eth_is_gether(mdp)) {
sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors,
CERCR);
sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors,
CEECR);
} else {
sh_eth_update_stat(ndev, &ndev->stats.tx_carrier_errors,
CNDCR);
}
return &ndev->stats;
}
/* device close function */
static int sh_eth_close(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
netif_stop_queue(ndev);
/* Serialise with the interrupt handler and NAPI, then disable
* interrupts. We have to clear the irq_enabled flag first to
* ensure that interrupts won't be re-enabled.
*/
mdp->irq_enabled = false;
synchronize_irq(ndev->irq);
napi_disable(&mdp->napi);
sh_eth_write(ndev, 0x0000, EESIPR);
sh_eth_dev_exit(ndev);
/* PHY Disconnect */
if (ndev->phydev) {
phy_stop(ndev->phydev);
phy_disconnect(ndev->phydev);
}
free_irq(ndev->irq, ndev);
/* Free all the skbuffs in the Rx queue and the DMA buffer. */
sh_eth_ring_free(ndev);
pm_runtime_put_sync(&mdp->pdev->dev);
mdp->is_opened = 0;
return 0;
}
/* ioctl to device function */
static int sh_eth_do_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
{
struct phy_device *phydev = ndev->phydev;
if (!netif_running(ndev))
return -EINVAL;
if (!phydev)
return -ENODEV;
return phy_mii_ioctl(phydev, rq, cmd);
}
/* For TSU_POSTn. Please refer to the manual about this (strange) bitfields */
static void *sh_eth_tsu_get_post_reg_offset(struct sh_eth_private *mdp,
int entry)
{
return sh_eth_tsu_get_offset(mdp, TSU_POST1) + (entry / 8 * 4);
}
static u32 sh_eth_tsu_get_post_mask(int entry)
{
return 0x0f << (28 - ((entry % 8) * 4));
}
static u32 sh_eth_tsu_get_post_bit(struct sh_eth_private *mdp, int entry)
{
return (0x08 >> (mdp->port << 1)) << (28 - ((entry % 8) * 4));
}
static void sh_eth_tsu_enable_cam_entry_post(struct net_device *ndev,
int entry)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 tmp;
void *reg_offset;
reg_offset = sh_eth_tsu_get_post_reg_offset(mdp, entry);
tmp = ioread32(reg_offset);
iowrite32(tmp | sh_eth_tsu_get_post_bit(mdp, entry), reg_offset);
}
static bool sh_eth_tsu_disable_cam_entry_post(struct net_device *ndev,
int entry)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 post_mask, ref_mask, tmp;
void *reg_offset;
reg_offset = sh_eth_tsu_get_post_reg_offset(mdp, entry);
post_mask = sh_eth_tsu_get_post_mask(entry);
ref_mask = sh_eth_tsu_get_post_bit(mdp, entry) & ~post_mask;
tmp = ioread32(reg_offset);
iowrite32(tmp & ~post_mask, reg_offset);
/* If other port enables, the function returns "true" */
return tmp & ref_mask;
}
static int sh_eth_tsu_busy(struct net_device *ndev)
{
int timeout = SH_ETH_TSU_TIMEOUT_MS * 100;
struct sh_eth_private *mdp = netdev_priv(ndev);
while ((sh_eth_tsu_read(mdp, TSU_ADSBSY) & TSU_ADSBSY_0)) {
udelay(10);
timeout--;
if (timeout <= 0) {
netdev_err(ndev, "%s: timeout\n", __func__);
return -ETIMEDOUT;
}
}
return 0;
}
static int sh_eth_tsu_write_entry(struct net_device *ndev, void *reg,
const u8 *addr)
{
u32 val;
val = addr[0] << 24 | addr[1] << 16 | addr[2] << 8 | addr[3];
iowrite32(val, reg);
if (sh_eth_tsu_busy(ndev) < 0)
return -EBUSY;
val = addr[4] << 8 | addr[5];
iowrite32(val, reg + 4);
if (sh_eth_tsu_busy(ndev) < 0)
return -EBUSY;
return 0;
}
static void sh_eth_tsu_read_entry(void *reg, u8 *addr)
{
u32 val;
val = ioread32(reg);
addr[0] = (val >> 24) & 0xff;
addr[1] = (val >> 16) & 0xff;
addr[2] = (val >> 8) & 0xff;
addr[3] = val & 0xff;
val = ioread32(reg + 4);
addr[4] = (val >> 8) & 0xff;
addr[5] = val & 0xff;
}
static int sh_eth_tsu_find_entry(struct net_device *ndev, const u8 *addr)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
int i;
u8 c_addr[ETH_ALEN];
for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
sh_eth_tsu_read_entry(reg_offset, c_addr);
if (ether_addr_equal(addr, c_addr))
return i;
}
return -ENOENT;
}
static int sh_eth_tsu_find_empty(struct net_device *ndev)
{
u8 blank[ETH_ALEN];
int entry;
memset(blank, 0, sizeof(blank));
entry = sh_eth_tsu_find_entry(ndev, blank);
return (entry < 0) ? -ENOMEM : entry;
}
static int sh_eth_tsu_disable_cam_entry_table(struct net_device *ndev,
int entry)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
int ret;
u8 blank[ETH_ALEN];
sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) &
~(1 << (31 - entry)), TSU_TEN);
memset(blank, 0, sizeof(blank));
ret = sh_eth_tsu_write_entry(ndev, reg_offset + entry * 8, blank);
if (ret < 0)
return ret;
return 0;
}
static int sh_eth_tsu_add_entry(struct net_device *ndev, const u8 *addr)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
int i, ret;
if (!mdp->cd->tsu)
return 0;
i = sh_eth_tsu_find_entry(ndev, addr);
if (i < 0) {
/* No entry found, create one */
i = sh_eth_tsu_find_empty(ndev);
if (i < 0)
return -ENOMEM;
ret = sh_eth_tsu_write_entry(ndev, reg_offset + i * 8, addr);
if (ret < 0)
return ret;
/* Enable the entry */
sh_eth_tsu_write(mdp, sh_eth_tsu_read(mdp, TSU_TEN) |
(1 << (31 - i)), TSU_TEN);
}
/* Entry found or created, enable POST */
sh_eth_tsu_enable_cam_entry_post(ndev, i);
return 0;
}
static int sh_eth_tsu_del_entry(struct net_device *ndev, const u8 *addr)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int i, ret;
if (!mdp->cd->tsu)
return 0;
i = sh_eth_tsu_find_entry(ndev, addr);
if (i) {
/* Entry found */
if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
goto done;
/* Disable the entry if both ports was disabled */
ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
if (ret < 0)
return ret;
}
done:
return 0;
}
static int sh_eth_tsu_purge_all(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int i, ret;
if (!mdp->cd->tsu)
return 0;
for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++) {
if (sh_eth_tsu_disable_cam_entry_post(ndev, i))
continue;
/* Disable the entry if both ports was disabled */
ret = sh_eth_tsu_disable_cam_entry_table(ndev, i);
if (ret < 0)
return ret;
}
return 0;
}
static void sh_eth_tsu_purge_mcast(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u8 addr[ETH_ALEN];
void *reg_offset = sh_eth_tsu_get_offset(mdp, TSU_ADRH0);
int i;
if (!mdp->cd->tsu)
return;
for (i = 0; i < SH_ETH_TSU_CAM_ENTRIES; i++, reg_offset += 8) {
sh_eth_tsu_read_entry(reg_offset, addr);
if (is_multicast_ether_addr(addr))
sh_eth_tsu_del_entry(ndev, addr);
}
}
/* Update promiscuous flag and multicast filter */
static void sh_eth_set_rx_mode(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 ecmr_bits;
int mcast_all = 0;
unsigned long flags;
spin_lock_irqsave(&mdp->lock, flags);
/* Initial condition is MCT = 1, PRM = 0.
* Depending on ndev->flags, set PRM or clear MCT
*/
ecmr_bits = sh_eth_read(ndev, ECMR) & ~ECMR_PRM;
if (mdp->cd->tsu)
ecmr_bits |= ECMR_MCT;
if (!(ndev->flags & IFF_MULTICAST)) {
sh_eth_tsu_purge_mcast(ndev);
mcast_all = 1;
}
if (ndev->flags & IFF_ALLMULTI) {
sh_eth_tsu_purge_mcast(ndev);
ecmr_bits &= ~ECMR_MCT;
mcast_all = 1;
}
if (ndev->flags & IFF_PROMISC) {
sh_eth_tsu_purge_all(ndev);
ecmr_bits = (ecmr_bits & ~ECMR_MCT) | ECMR_PRM;
} else if (mdp->cd->tsu) {
struct netdev_hw_addr *ha;
netdev_for_each_mc_addr(ha, ndev) {
if (mcast_all && is_multicast_ether_addr(ha->addr))
continue;
if (sh_eth_tsu_add_entry(ndev, ha->addr) < 0) {
if (!mcast_all) {
sh_eth_tsu_purge_mcast(ndev);
ecmr_bits &= ~ECMR_MCT;
mcast_all = 1;
}
}
}
}
/* update the ethernet mode */
sh_eth_write(ndev, ecmr_bits, ECMR);
spin_unlock_irqrestore(&mdp->lock, flags);
}
static int sh_eth_get_vtag_index(struct sh_eth_private *mdp)
{
if (!mdp->port)
return TSU_VTAG0;
else
return TSU_VTAG1;
}
static int sh_eth_vlan_rx_add_vid(struct net_device *ndev,
__be16 proto, u16 vid)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int vtag_reg_index = sh_eth_get_vtag_index(mdp);
if (unlikely(!mdp->cd->tsu))
return -EPERM;
/* No filtering if vid = 0 */
if (!vid)
return 0;
mdp->vlan_num_ids++;
/* The controller has one VLAN tag HW filter. So, if the filter is
* already enabled, the driver disables it and the filte
*/
if (mdp->vlan_num_ids > 1) {
/* disable VLAN filter */
sh_eth_tsu_write(mdp, 0, vtag_reg_index);
return 0;
}
sh_eth_tsu_write(mdp, TSU_VTAG_ENABLE | (vid & TSU_VTAG_VID_MASK),
vtag_reg_index);
return 0;
}
static int sh_eth_vlan_rx_kill_vid(struct net_device *ndev,
__be16 proto, u16 vid)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
int vtag_reg_index = sh_eth_get_vtag_index(mdp);
if (unlikely(!mdp->cd->tsu))
return -EPERM;
/* No filtering if vid = 0 */
if (!vid)
return 0;
mdp->vlan_num_ids--;
sh_eth_tsu_write(mdp, 0, vtag_reg_index);
return 0;
}
/* SuperH's TSU register init function */
static void sh_eth_tsu_init(struct sh_eth_private *mdp)
{
if (sh_eth_is_rz_fast_ether(mdp)) {
sh_eth_tsu_write(mdp, 0, TSU_TEN); /* Disable all CAM entry */
sh_eth_tsu_write(mdp, TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL,
TSU_FWSLC); /* Enable POST registers */
return;
}
sh_eth_tsu_write(mdp, 0, TSU_FWEN0); /* Disable forward(0->1) */
sh_eth_tsu_write(mdp, 0, TSU_FWEN1); /* Disable forward(1->0) */
sh_eth_tsu_write(mdp, 0, TSU_FCM); /* forward fifo 3k-3k */
sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL0);
sh_eth_tsu_write(mdp, 0xc, TSU_BSYSL1);
sh_eth_tsu_write(mdp, 0, TSU_PRISL0);
sh_eth_tsu_write(mdp, 0, TSU_PRISL1);
sh_eth_tsu_write(mdp, 0, TSU_FWSL0);
sh_eth_tsu_write(mdp, 0, TSU_FWSL1);
sh_eth_tsu_write(mdp, TSU_FWSLC_POSTENU | TSU_FWSLC_POSTENL, TSU_FWSLC);
if (sh_eth_is_gether(mdp)) {
sh_eth_tsu_write(mdp, 0, TSU_QTAG0); /* Disable QTAG(0->1) */
sh_eth_tsu_write(mdp, 0, TSU_QTAG1); /* Disable QTAG(1->0) */
} else {
sh_eth_tsu_write(mdp, 0, TSU_QTAGM0); /* Disable QTAG(0->1) */
sh_eth_tsu_write(mdp, 0, TSU_QTAGM1); /* Disable QTAG(1->0) */
}
sh_eth_tsu_write(mdp, 0, TSU_FWSR); /* all interrupt status clear */
sh_eth_tsu_write(mdp, 0, TSU_FWINMK); /* Disable all interrupt */
sh_eth_tsu_write(mdp, 0, TSU_TEN); /* Disable all CAM entry */
sh_eth_tsu_write(mdp, 0, TSU_POST1); /* Disable CAM entry [ 0- 7] */
sh_eth_tsu_write(mdp, 0, TSU_POST2); /* Disable CAM entry [ 8-15] */
sh_eth_tsu_write(mdp, 0, TSU_POST3); /* Disable CAM entry [16-23] */
sh_eth_tsu_write(mdp, 0, TSU_POST4); /* Disable CAM entry [24-31] */
}
/* MDIO bus release function */
static int sh_mdio_release(struct sh_eth_private *mdp)
{
/* unregister mdio bus */
mdiobus_unregister(mdp->mii_bus);
/* free bitbang info */
free_mdio_bitbang(mdp->mii_bus);
return 0;
}
/* MDIO bus init function */
static int sh_mdio_init(struct sh_eth_private *mdp,
struct sh_eth_plat_data *pd)
{
int ret;
struct bb_info *bitbang;
struct platform_device *pdev = mdp->pdev;
struct device *dev = &mdp->pdev->dev;
/* create bit control struct for PHY */
bitbang = devm_kzalloc(dev, sizeof(struct bb_info), GFP_KERNEL);
if (!bitbang)
return -ENOMEM;
/* bitbang init */
bitbang->addr = mdp->addr + mdp->reg_offset[PIR];
bitbang->set_gate = pd->set_mdio_gate;
bitbang->ctrl.ops = &bb_ops;
/* MII controller setting */
mdp->mii_bus = alloc_mdio_bitbang(&bitbang->ctrl);
if (!mdp->mii_bus)
return -ENOMEM;
/* Hook up MII support for ethtool */
mdp->mii_bus->name = "sh_mii";
mdp->mii_bus->parent = dev;
snprintf(mdp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
pdev->name, pdev->id);
/* register MDIO bus */
if (dev->of_node) {
ret = of_mdiobus_register(mdp->mii_bus, dev->of_node);
} else {
if (pd->phy_irq > 0)
mdp->mii_bus->irq[pd->phy] = pd->phy_irq;
ret = mdiobus_register(mdp->mii_bus);
}
if (ret)
goto out_free_bus;
return 0;
out_free_bus:
free_mdio_bitbang(mdp->mii_bus);
return ret;
}
static const u16 *sh_eth_get_register_offset(int register_type)
{
const u16 *reg_offset = NULL;
switch (register_type) {
case SH_ETH_REG_GIGABIT:
reg_offset = sh_eth_offset_gigabit;
break;
case SH_ETH_REG_FAST_RZ:
reg_offset = sh_eth_offset_fast_rz;
break;
case SH_ETH_REG_FAST_RCAR:
reg_offset = sh_eth_offset_fast_rcar;
break;
case SH_ETH_REG_FAST_SH4:
reg_offset = sh_eth_offset_fast_sh4;
break;
case SH_ETH_REG_FAST_SH3_SH2:
reg_offset = sh_eth_offset_fast_sh3_sh2;
break;
}
return reg_offset;
}
static const struct net_device_ops sh_eth_netdev_ops = {
.ndo_open = sh_eth_open,
.ndo_stop = sh_eth_close,
.ndo_start_xmit = sh_eth_start_xmit,
.ndo_get_stats = sh_eth_get_stats,
.ndo_set_rx_mode = sh_eth_set_rx_mode,
.ndo_tx_timeout = sh_eth_tx_timeout,
.ndo_do_ioctl = sh_eth_do_ioctl,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
.ndo_change_mtu = eth_change_mtu,
};
static const struct net_device_ops sh_eth_netdev_ops_tsu = {
.ndo_open = sh_eth_open,
.ndo_stop = sh_eth_close,
.ndo_start_xmit = sh_eth_start_xmit,
.ndo_get_stats = sh_eth_get_stats,
.ndo_set_rx_mode = sh_eth_set_rx_mode,
.ndo_vlan_rx_add_vid = sh_eth_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = sh_eth_vlan_rx_kill_vid,
.ndo_tx_timeout = sh_eth_tx_timeout,
.ndo_do_ioctl = sh_eth_do_ioctl,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
.ndo_change_mtu = eth_change_mtu,
};
#ifdef CONFIG_OF
static struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
{
struct device_node *np = dev->of_node;
struct sh_eth_plat_data *pdata;
const char *mac_addr;
int ret;
pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return NULL;
ret = of_get_phy_mode(np);
if (ret < 0)
return NULL;
pdata->phy_interface = ret;
mac_addr = of_get_mac_address(np);
if (mac_addr)
memcpy(pdata->mac_addr, mac_addr, ETH_ALEN);
pdata->no_ether_link =
of_property_read_bool(np, "renesas,no-ether-link");
pdata->ether_link_active_low =
of_property_read_bool(np, "renesas,ether-link-active-low");
return pdata;
}
static const struct of_device_id sh_eth_match_table[] = {
{ .compatible = "renesas,gether-r8a7740", .data = &r8a7740_data },
{ .compatible = "renesas,ether-r8a7743", .data = &r8a779x_data },
{ .compatible = "renesas,ether-r8a7745", .data = &r8a779x_data },
{ .compatible = "renesas,ether-r8a7778", .data = &r8a777x_data },
{ .compatible = "renesas,ether-r8a7779", .data = &r8a777x_data },
{ .compatible = "renesas,ether-r8a7790", .data = &r8a779x_data },
{ .compatible = "renesas,ether-r8a7791", .data = &r8a779x_data },
{ .compatible = "renesas,ether-r8a7793", .data = &r8a779x_data },
{ .compatible = "renesas,ether-r8a7794", .data = &r8a779x_data },
{ .compatible = "renesas,ether-r7s72100", .data = &r7s72100_data },
{ }
};
MODULE_DEVICE_TABLE(of, sh_eth_match_table);
#else
static inline struct sh_eth_plat_data *sh_eth_parse_dt(struct device *dev)
{
return NULL;
}
#endif
static int sh_eth_drv_probe(struct platform_device *pdev)
{
struct resource *res;
struct sh_eth_plat_data *pd = dev_get_platdata(&pdev->dev);
const struct platform_device_id *id = platform_get_device_id(pdev);
struct sh_eth_private *mdp;
struct net_device *ndev;
int ret, devno;
/* get base addr */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ndev = alloc_etherdev(sizeof(struct sh_eth_private));
if (!ndev)
return -ENOMEM;
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
devno = pdev->id;
if (devno < 0)
devno = 0;
ret = platform_get_irq(pdev, 0);
if (ret < 0)
goto out_release;
ndev->irq = ret;
SET_NETDEV_DEV(ndev, &pdev->dev);
mdp = netdev_priv(ndev);
mdp->num_tx_ring = TX_RING_SIZE;
mdp->num_rx_ring = RX_RING_SIZE;
mdp->addr = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(mdp->addr)) {
ret = PTR_ERR(mdp->addr);
goto out_release;
}
ndev->base_addr = res->start;
spin_lock_init(&mdp->lock);
mdp->pdev = pdev;
if (pdev->dev.of_node)
pd = sh_eth_parse_dt(&pdev->dev);
if (!pd) {
dev_err(&pdev->dev, "no platform data\n");
ret = -EINVAL;
goto out_release;
}
/* get PHY ID */
mdp->phy_id = pd->phy;
mdp->phy_interface = pd->phy_interface;
mdp->no_ether_link = pd->no_ether_link;
mdp->ether_link_active_low = pd->ether_link_active_low;
/* set cpu data */
if (id)
mdp->cd = (struct sh_eth_cpu_data *)id->driver_data;
else
mdp->cd = (struct sh_eth_cpu_data *)of_device_get_match_data(&pdev->dev);
mdp->reg_offset = sh_eth_get_register_offset(mdp->cd->register_type);
if (!mdp->reg_offset) {
dev_err(&pdev->dev, "Unknown register type (%d)\n",
mdp->cd->register_type);
ret = -EINVAL;
goto out_release;
}
sh_eth_set_default_cpu_data(mdp->cd);
/* set function */
if (mdp->cd->tsu)
ndev->netdev_ops = &sh_eth_netdev_ops_tsu;
else
ndev->netdev_ops = &sh_eth_netdev_ops;
ndev->ethtool_ops = &sh_eth_ethtool_ops;
ndev->watchdog_timeo = TX_TIMEOUT;
/* debug message level */
mdp->msg_enable = SH_ETH_DEF_MSG_ENABLE;
/* read and set MAC address */
read_mac_address(ndev, pd->mac_addr);
if (!is_valid_ether_addr(ndev->dev_addr)) {
dev_warn(&pdev->dev,
"no valid MAC address supplied, using a random one.\n");
eth_hw_addr_random(ndev);
}
/* ioremap the TSU registers */
if (mdp->cd->tsu) {
struct resource *rtsu;
rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (!rtsu) {
dev_err(&pdev->dev, "no TSU resource\n");
ret = -ENODEV;
goto out_release;
}
/* We can only request the TSU region for the first port
* of the two sharing this TSU for the probe to succeed...
*/
if (devno % 2 == 0 &&
!devm_request_mem_region(&pdev->dev, rtsu->start,
resource_size(rtsu),
dev_name(&pdev->dev))) {
dev_err(&pdev->dev, "can't request TSU resource.\n");
ret = -EBUSY;
goto out_release;
}
mdp->tsu_addr = devm_ioremap(&pdev->dev, rtsu->start,
resource_size(rtsu));
if (!mdp->tsu_addr) {
dev_err(&pdev->dev, "TSU region ioremap() failed.\n");
ret = -ENOMEM;
goto out_release;
}
mdp->port = devno % 2;
ndev->features = NETIF_F_HW_VLAN_CTAG_FILTER;
}
/* Need to init only the first port of the two sharing a TSU */
if (devno % 2 == 0) {
if (mdp->cd->chip_reset)
mdp->cd->chip_reset(ndev);
if (mdp->cd->tsu) {
/* TSU init (Init only)*/
sh_eth_tsu_init(mdp);
}
}
if (mdp->cd->rmiimode)
sh_eth_write(ndev, 0x1, RMIIMODE);
/* MDIO bus init */
ret = sh_mdio_init(mdp, pd);
if (ret) {
dev_err(&pdev->dev, "failed to initialise MDIO\n");
goto out_release;
}
netif_napi_add(ndev, &mdp->napi, sh_eth_poll, 64);
/* network device register */
ret = register_netdev(ndev);
if (ret)
goto out_napi_del;
/* print device information */
netdev_info(ndev, "Base address at 0x%x, %pM, IRQ %d.\n",
(u32)ndev->base_addr, ndev->dev_addr, ndev->irq);
pm_runtime_put(&pdev->dev);
platform_set_drvdata(pdev, ndev);
return ret;
out_napi_del:
netif_napi_del(&mdp->napi);
sh_mdio_release(mdp);
out_release:
/* net_dev free */
if (ndev)
free_netdev(ndev);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return ret;
}
static int sh_eth_drv_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct sh_eth_private *mdp = netdev_priv(ndev);
unregister_netdev(ndev);
netif_napi_del(&mdp->napi);
sh_mdio_release(mdp);
pm_runtime_disable(&pdev->dev);
free_netdev(ndev);
return 0;
}
#ifdef CONFIG_PM
#ifdef CONFIG_PM_SLEEP
static int sh_eth_suspend(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
int ret = 0;
if (netif_running(ndev)) {
netif_device_detach(ndev);
ret = sh_eth_close(ndev);
}
return ret;
}
static int sh_eth_resume(struct device *dev)
{
struct net_device *ndev = dev_get_drvdata(dev);
int ret = 0;
if (netif_running(ndev)) {
ret = sh_eth_open(ndev);
if (ret < 0)
return ret;
netif_device_attach(ndev);
}
return ret;
}
#endif
static int sh_eth_runtime_nop(struct device *dev)
{
/* Runtime PM callback shared between ->runtime_suspend()
* and ->runtime_resume(). Simply returns success.
*
* This driver re-initializes all registers after
* pm_runtime_get_sync() anyway so there is no need
* to save and restore registers here.
*/
return 0;
}
static const struct dev_pm_ops sh_eth_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(sh_eth_suspend, sh_eth_resume)
SET_RUNTIME_PM_OPS(sh_eth_runtime_nop, sh_eth_runtime_nop, NULL)
};
#define SH_ETH_PM_OPS (&sh_eth_dev_pm_ops)
#else
#define SH_ETH_PM_OPS NULL
#endif
static struct platform_device_id sh_eth_id_table[] = {
{ "sh7619-ether", (kernel_ulong_t)&sh7619_data },
{ "sh771x-ether", (kernel_ulong_t)&sh771x_data },
{ "sh7724-ether", (kernel_ulong_t)&sh7724_data },
{ "sh7734-gether", (kernel_ulong_t)&sh7734_data },
{ "sh7757-ether", (kernel_ulong_t)&sh7757_data },
{ "sh7757-gether", (kernel_ulong_t)&sh7757_data_giga },
{ "sh7763-gether", (kernel_ulong_t)&sh7763_data },
{ }
};
MODULE_DEVICE_TABLE(platform, sh_eth_id_table);
static struct platform_driver sh_eth_driver = {
.probe = sh_eth_drv_probe,
.remove = sh_eth_drv_remove,
.id_table = sh_eth_id_table,
.driver = {
.name = CARDNAME,
.pm = SH_ETH_PM_OPS,
.of_match_table = of_match_ptr(sh_eth_match_table),
},
};
module_platform_driver(sh_eth_driver);
MODULE_AUTHOR("Nobuhiro Iwamatsu, Yoshihiro Shimoda");
MODULE_DESCRIPTION("Renesas SuperH Ethernet driver");
MODULE_LICENSE("GPL v2");
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