diff options
Diffstat (limited to 'drivers/net/ethernet/renesas/sh_eth.c')
| -rw-r--r-- | drivers/net/ethernet/renesas/sh_eth.c | 3000 |
1 files changed, 3000 insertions, 0 deletions
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c new file mode 100644 index 00000000000..7622213beef --- /dev/null +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -0,0 +1,3000 @@ +/* SuperH Ethernet device driver + * + * Copyright (C) 2006-2012 Nobuhiro Iwamatsu + * Copyright (C) 2008-2014 Renesas Solutions Corp. + * Copyright (C) 2013-2014 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) + +static const u16 sh_eth_offset_gigabit[SH_ETH_MAX_REGISTER_OFFSET] = { + [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, + [TSU_ADRL0] = 0x0104, + [TSU_ADRH31] = 0x01f8, + [TSU_ADRL31] = 0x01fc, + + [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] = { + [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_VTAG0] = 0x0058, + [TSU_ADSBSY] = 0x0060, + [TSU_TEN] = 0x0064, + [TSU_ADRH0] = 0x0100, + [TSU_ADRL0] = 0x0104, + [TSU_ADRH31] = 0x01f8, + [TSU_ADRL31] = 0x01fc, + + [TXNLCR0] = 0x0080, + [TXALCR0] = 0x0084, + [RXNLCR0] = 0x0088, + [RXALCR0] = 0x008C, +}; + +static const u16 sh_eth_offset_fast_rcar[SH_ETH_MAX_REGISTER_OFFSET] = { + [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] = { + [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] = { + [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, + [TSU_ADRL0] = 0x0104, + [TSU_ADRL31] = 0x01fc, +}; + +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) +{ + u32 value = 0x0; + struct sh_eth_private *mdp = netdev_priv(ndev); + + 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); + + if (mdp->duplex) /* Full */ + sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_DM, ECMR); + else /* Half */ + sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_DM, ECMR); +} + +/* 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_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_ELB, ECMR); + break; + case 100:/* 100BASE */ + sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_ELB, ECMR); + break; + default: + 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, + + .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, + + .apr = 1, + .mpr = 1, + .tpauser = 1, + .hw_swap = 1, + .rmiimode = 1, + .shift_rd0 = 1, +}; + +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_write(ndev, sh_eth_read(ndev, ECMR) & ~ECMR_RTM, ECMR); + break; + case 100:/* 100BASE */ + sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | ECMR_RTM, ECMR); + break; + default: + 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; + default: + 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, +}; + +#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) +{ + int i; + unsigned long mahr[2], malr[2]; + + /* save MAHR and MALR */ + for (i = 0; i < 2; i++) { + malr[i] = ioread32((void *)GIGA_MALR(i)); + mahr[i] = ioread32((void *)GIGA_MAHR(i)); + } + + /* reset device */ + iowrite32(ARSTR_ARSTR, (void *)(SH_GIGA_ETH_BASE + 0x1800)); + mdelay(1); + + /* 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; + default: + 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, +}; + +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_ARSTR, 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; + default: + break; + } +} + +/* 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 | 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, + + .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, +}; + +/* 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 | 0x003fffff, + + .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 void sh_eth_chip_reset_r8a7740(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + + /* reset device */ + sh_eth_tsu_write(mdp, ARSTR_ARSTR, ARSTR); + mdelay(1); + + 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, + .tsu = 1, + .select_mii = 1, + .shift_rd0 = 1, +}; + +/* 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 = 0xff7f009f, + + .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 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; +} + +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) & 0x3)) + 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_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_GETHER, + EDMR); + + 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_write(ndev, sh_eth_read(ndev, EDMR) | EDMR_SRST_ETHER, + EDMR); + mdelay(3); + sh_eth_write(ndev, sh_eth_read(ndev, EDMR) & ~EDMR_SRST_ETHER, + EDMR); + } + + return ret; +} + +#if defined(CONFIG_CPU_SH4) || defined(CONFIG_ARCH_SHMOBILE) +static void sh_eth_set_receive_align(struct sk_buff *skb) +{ + int reserve; + + reserve = SH4_SKB_RX_ALIGN - ((u32)skb->data & (SH4_SKB_RX_ALIGN - 1)); + if (reserve) + skb_reserve(skb, reserve); +} +#else +static void sh_eth_set_receive_align(struct sk_buff *skb) +{ + skb_reserve(skb, SH2_SH3_SKB_RX_ALIGN); +} +#endif + + +/* CPU <-> EDMAC endian convert */ +static inline __u32 cpu_to_edmac(struct sh_eth_private *mdp, u32 x) +{ + switch (mdp->edmac_endian) { + case EDMAC_LITTLE_ENDIAN: + return cpu_to_le32(x); + case EDMAC_BIG_ENDIAN: + return cpu_to_be32(x); + } + return x; +} + +static inline __u32 edmac_to_cpu(struct sh_eth_private *mdp, u32 x) +{ + switch (mdp->edmac_endian) { + case EDMAC_LITTLE_ENDIAN: + return le32_to_cpu(x); + case EDMAC_BIG_ENDIAN: + return be32_to_cpu(x); + } + return x; +} + +/* 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 { + ndev->dev_addr[0] = (sh_eth_read(ndev, MAHR) >> 24); + ndev->dev_addr[1] = (sh_eth_read(ndev, MAHR) >> 16) & 0xFF; + ndev->dev_addr[2] = (sh_eth_read(ndev, MAHR) >> 8) & 0xFF; + ndev->dev_addr[3] = (sh_eth_read(ndev, MAHR) & 0xFF); + ndev->dev_addr[4] = (sh_eth_read(ndev, MALR) >> 8) & 0xFF; + ndev->dev_addr[5] = (sh_eth_read(ndev, MALR) & 0xFF); + } +} + +static unsigned long 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; + u32 mmd_msk;/* MMD */ + u32 mdo_msk; + u32 mdi_msk; + u32 mdc_msk; +}; + +/* PHY bit set */ +static void bb_set(void *addr, u32 msk) +{ + iowrite32(ioread32(addr) | msk, addr); +} + +/* PHY bit clear */ +static void bb_clr(void *addr, u32 msk) +{ + iowrite32((ioread32(addr) & ~msk), addr); +} + +/* PHY bit read */ +static int bb_read(void *addr, u32 msk) +{ + return (ioread32(addr) & msk) != 0; +} + +/* Data I/O pin control */ +static void sh_mmd_ctrl(struct mdiobb_ctrl *ctrl, int bit) +{ + struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); + + if (bitbang->set_gate) + bitbang->set_gate(bitbang->addr); + + if (bit) + bb_set(bitbang->addr, bitbang->mmd_msk); + else + bb_clr(bitbang->addr, bitbang->mmd_msk); +} + +/* Set bit data*/ +static void sh_set_mdio(struct mdiobb_ctrl *ctrl, int bit) +{ + struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); + + if (bitbang->set_gate) + bitbang->set_gate(bitbang->addr); + + if (bit) + bb_set(bitbang->addr, bitbang->mdo_msk); + else + bb_clr(bitbang->addr, bitbang->mdo_msk); +} + +/* 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 bb_read(bitbang->addr, bitbang->mdi_msk); +} + +/* MDC pin control */ +static void sh_mdc_ctrl(struct mdiobb_ctrl *ctrl, int bit) +{ + struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl); + + if (bitbang->set_gate) + bitbang->set_gate(bitbang->addr); + + if (bit) + bb_set(bitbang->addr, bitbang->mdc_msk); + else + bb_clr(bitbang->addr, bitbang->mdc_msk); +} + +/* 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 skb and descriptor buffer */ +static void sh_eth_ring_free(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + int i; + + /* Free Rx skb ringbuffer */ + if (mdp->rx_skbuff) { + for (i = 0; i < mdp->num_rx_ring; i++) { + if (mdp->rx_skbuff[i]) + dev_kfree_skb(mdp->rx_skbuff[i]); + } + } + kfree(mdp->rx_skbuff); + mdp->rx_skbuff = NULL; + + /* Free Tx skb ringbuffer */ + if (mdp->tx_skbuff) { + for (i = 0; i < mdp->num_tx_ring; i++) { + if (mdp->tx_skbuff[i]) + dev_kfree_skb(mdp->tx_skbuff[i]); + } + } + 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; + + 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, mdp->rx_buf_sz); + mdp->rx_skbuff[i] = skb; + if (skb == NULL) + break; + dma_map_single(&ndev->dev, skb->data, mdp->rx_buf_sz, + DMA_FROM_DEVICE); + sh_eth_set_receive_align(skb); + + /* RX descriptor */ + rxdesc = &mdp->rx_ring[i]; + rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4)); + rxdesc->status = cpu_to_edmac(mdp, RD_RACT | RD_RFP); + + /* The size of the buffer is 16 byte boundary. */ + rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16); + /* 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. */ + rxdesc->status |= cpu_to_edmac(mdp, RD_RDEL); + + 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_edmac(mdp, TD_TFP); + txdesc->buffer_length = 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_edmac(mdp, 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, ret = 0; + + /* +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 = kmalloc_array(mdp->num_rx_ring, + sizeof(*mdp->rx_skbuff), GFP_KERNEL); + if (!mdp->rx_skbuff) { + ret = -ENOMEM; + return ret; + } + + mdp->tx_skbuff = kmalloc_array(mdp->num_tx_ring, + sizeof(*mdp->tx_skbuff), GFP_KERNEL); + if (!mdp->tx_skbuff) { + ret = -ENOMEM; + goto skb_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) { + ret = -ENOMEM; + goto desc_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) { + ret = -ENOMEM; + goto desc_ring_free; + } + return ret; + +desc_ring_free: + /* free DMA buffer */ + dma_free_coherent(NULL, rx_ringsize, mdp->rx_ring, mdp->rx_desc_dma); + +skb_ring_free: + /* Free Rx and Tx skb ring buffer */ + sh_eth_ring_free(ndev); + mdp->tx_ring = NULL; + mdp->rx_ring = NULL; + + return ret; +} + +static void sh_eth_free_dma_buffer(struct sh_eth_private *mdp) +{ + int ringsize; + + if (mdp->rx_ring) { + 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; + } + + if (mdp->tx_ring) { + 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; + } +} + +static int sh_eth_dev_init(struct net_device *ndev, bool start) +{ + int ret = 0; + struct sh_eth_private *mdp = netdev_priv(ndev); + u32 val; + + /* 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, DESC_I_RINT8 | DESC_I_RINT5 | DESC_I_TINT2, 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_write(ndev, sh_eth_read(ndev, EESR), EESR); + if (start) + sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR); + + /* PAUSE Prohibition */ + val = (sh_eth_read(ndev, ECMR) & ECMR_DM) | + ECMR_ZPF | (mdp->duplex ? ECMR_DM : 0) | ECMR_TE | ECMR_RE; + + sh_eth_write(ndev, val, 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 */ + if (start) + 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); + + if (start) { + /* Setting the Rx mode will start the Rx process. */ + sh_eth_write(ndev, EDRRR_R, EDRRR); + + netif_start_queue(ndev); + } + + return ret; +} + +/* free Tx skb function */ +static int sh_eth_txfree(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + struct sh_eth_txdesc *txdesc; + int free_num = 0; + int entry = 0; + + for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) { + entry = mdp->dirty_tx % mdp->num_tx_ring; + txdesc = &mdp->tx_ring[entry]; + if (txdesc->status & cpu_to_edmac(mdp, TD_TACT)) + break; + /* Free the original skb. */ + if (mdp->tx_skbuff[entry]) { + dma_unmap_single(&ndev->dev, txdesc->addr, + txdesc->buffer_length, DMA_TO_DEVICE); + dev_kfree_skb_irq(mdp->tx_skbuff[entry]); + mdp->tx_skbuff[entry] = NULL; + free_num++; + } + txdesc->status = cpu_to_edmac(mdp, TD_TFP); + if (entry >= mdp->num_tx_ring - 1) + txdesc->status |= cpu_to_edmac(mdp, TD_TDLE); + + ndev->stats.tx_packets++; + ndev->stats.tx_bytes += txdesc->buffer_length; + } + return free_num; +} + +/* 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; + struct sk_buff *skb; + u16 pkt_len = 0; + u32 desc_status; + + rxdesc = &mdp->rx_ring[entry]; + while (!(rxdesc->status & cpu_to_edmac(mdp, RD_RACT))) { + desc_status = edmac_to_cpu(mdp, rxdesc->status); + pkt_len = rxdesc->frame_length; + + if (--boguscnt < 0) + break; + + if (*quota <= 0) + break; + + (*quota)--; + + 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, R8A779x, 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; + + 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 (!mdp->cd->hw_swap) + sh_eth_soft_swap( + phys_to_virt(ALIGN(rxdesc->addr, 4)), + pkt_len + 2); + skb = mdp->rx_skbuff[entry]; + mdp->rx_skbuff[entry] = NULL; + if (mdp->cd->rpadir) + skb_reserve(skb, NET_IP_ALIGN); + dma_sync_single_for_cpu(&ndev->dev, rxdesc->addr, + mdp->rx_buf_sz, + 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; + } + 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 16 byte boundary. */ + rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16); + + if (mdp->rx_skbuff[entry] == NULL) { + skb = netdev_alloc_skb(ndev, mdp->rx_buf_sz); + mdp->rx_skbuff[entry] = skb; + if (skb == NULL) + break; /* Better luck next round. */ + dma_map_single(&ndev->dev, skb->data, mdp->rx_buf_sz, + DMA_FROM_DEVICE); + sh_eth_set_receive_align(skb); + + skb_checksum_none_assert(skb); + rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4)); + } + if (entry >= mdp->num_rx_ring - 1) + rxdesc->status |= + cpu_to_edmac(mdp, RD_RACT | RD_RFP | RD_RDEL); + else + rxdesc->status |= + cpu_to_edmac(mdp, 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) { + 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); + } + + return *quota <= 0; +} + +static void sh_eth_rcv_snd_disable(struct net_device *ndev) +{ + /* disable tx and rx */ + sh_eth_write(ndev, sh_eth_read(ndev, ECMR) & + ~(ECMR_RE | ECMR_TE), ECMR); +} + +static void sh_eth_rcv_snd_enable(struct net_device *ndev) +{ + /* enable tx and rx */ + sh_eth_write(ndev, sh_eth_read(ndev, ECMR) | + (ECMR_RE | ECMR_TE), ECMR); +} + +/* error control function */ +static void sh_eth_error(struct net_device *ndev, int 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_write(ndev, sh_eth_read(ndev, EESIPR) & + ~DMAC_M_ECI, EESIPR); + /* clear int */ + sh_eth_write(ndev, sh_eth_read(ndev, ECSR), + ECSR); + sh_eth_write(ndev, sh_eth_read(ndev, EESIPR) | + DMAC_M_ECI, EESIPR); + /* 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++; + netif_err(mdp, rx_err, ndev, "Receive Abort\n"); + } + } + + 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++; + netif_err(mdp, rx_err, ndev, "Receive Descriptor Empty\n"); + } + + if (intr_status & EESR_RFE) { + /* Receive FIFO Overflow int */ + ndev->stats.rx_fifo_errors++; + netif_err(mdp, rx_err, ndev, "Receive FIFO Overflow\n"); + } + + 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_txfree(ndev); + + /* 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; + unsigned long 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 other_irq; + + 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%08lx, mask 0x%08lx.\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_txfree(ndev); + 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); + } + +other_irq: + 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; + unsigned long 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, "a)) + goto out; + } + + napi_complete(napi); + + /* Reenable Rx interrupts */ + 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 = mdp->phydev; + int new_state = 0; + + 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_write(ndev, + sh_eth_read(ndev, ECMR) & ~ECMR_TXF, + ECMR); + new_state = 1; + mdp->link = phydev->link; + if (mdp->cd->no_psr || mdp->no_ether_link) + sh_eth_rcv_snd_enable(ndev); + } + } else if (mdp->link) { + new_state = 1; + mdp->link = 0; + mdp->speed = 0; + mdp->duplex = -1; + if (mdp->cd->no_psr || mdp->no_ether_link) + sh_eth_rcv_snd_disable(ndev); + } + + 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 = NULL; + + 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); + + 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); + } + + netdev_info(ndev, "attached PHY %d (IRQ %d) to driver %s\n", + phydev->addr, phydev->irq, phydev->drv->name); + + mdp->phydev = phydev; + + return 0; +} + +/* PHY control start function */ +static int sh_eth_phy_start(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + int ret; + + ret = sh_eth_phy_init(ndev); + if (ret) + return ret; + + phy_start(mdp->phydev); + + return 0; +} + +static int sh_eth_get_settings(struct net_device *ndev, + struct ethtool_cmd *ecmd) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + unsigned long flags; + int ret; + + spin_lock_irqsave(&mdp->lock, flags); + ret = phy_ethtool_gset(mdp->phydev, ecmd); + spin_unlock_irqrestore(&mdp->lock, flags); + + return ret; +} + +static int sh_eth_set_settings(struct net_device *ndev, + struct ethtool_cmd *ecmd) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + unsigned long flags; + int ret; + + spin_lock_irqsave(&mdp->lock, flags); + + /* disable tx and rx */ + sh_eth_rcv_snd_disable(ndev); + + ret = phy_ethtool_sset(mdp->phydev, ecmd); + if (ret) + goto error_exit; + + if (ecmd->duplex == DUPLEX_FULL) + mdp->duplex = 1; + else + mdp->duplex = 0; + + if (mdp->cd->set_duplex) + mdp->cd->set_duplex(ndev); + +error_exit: + mdelay(1); + + /* enable tx and rx */ + sh_eth_rcv_snd_enable(ndev); + + spin_unlock_irqrestore(&mdp->lock, flags); + + return ret; +} + +static int sh_eth_nway_reset(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + unsigned long flags; + int ret; + + spin_lock_irqsave(&mdp->lock, flags); + ret = phy_start_aneg(mdp->phydev); + spin_unlock_irqrestore(&mdp->lock, flags); + + return ret; +} + +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_tx_disable(ndev); + /* Disable interrupts by clearing the interrupt mask. */ + sh_eth_write(ndev, 0x0000, EESIPR); + /* Stop the chip's Tx and Rx processes. */ + sh_eth_write(ndev, 0, EDTRR); + sh_eth_write(ndev, 0, EDRRR); + synchronize_irq(ndev->irq); + } + + /* Free all the skbuffs in the Rx queue. */ + sh_eth_ring_free(ndev); + /* Free DMA buffer */ + sh_eth_free_dma_buffer(mdp); + + /* Set new parameters */ + mdp->num_rx_ring = ring->rx_pending; + mdp->num_tx_ring = ring->tx_pending; + + 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, false); + if (ret < 0) { + netdev_err(ndev, "%s: sh_eth_dev_init failed.\n", __func__); + return ret; + } + + if (netif_running(ndev)) { + sh_eth_write(ndev, mdp->cd->eesipr_value, EESIPR); + /* Setting the Rx mode will start the Rx process. */ + sh_eth_write(ndev, EDRRR_R, EDRRR); + netif_wake_queue(ndev); + } + + return 0; +} + +static const struct ethtool_ops sh_eth_ethtool_ops = { + .get_settings = sh_eth_get_settings, + .set_settings = sh_eth_set_settings, + .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, +}; + +/* network device open function */ +static int sh_eth_open(struct net_device *ndev) +{ + int ret = 0; + struct sh_eth_private *mdp = netdev_priv(ndev); + + 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, true); + if (ret) + goto out_free_irq; + + /* PHY control start*/ + ret = sh_eth_phy_start(ndev); + if (ret) + goto out_free_irq; + + 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", + (int)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 = 0; + rxdesc->addr = 0xBADF00D0; + if (mdp->rx_skbuff[i]) + dev_kfree_skb(mdp->rx_skbuff[i]); + mdp->rx_skbuff[i] = NULL; + } + for (i = 0; i < mdp->num_tx_ring; i++) { + if (mdp->tx_skbuff[i]) + dev_kfree_skb(mdp->tx_skbuff[i]); + mdp->tx_skbuff[i] = NULL; + } + + /* device init */ + sh_eth_dev_init(ndev, true); +} + +/* 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; + 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_txfree(ndev)) { + 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); + + 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(phys_to_virt(ALIGN(txdesc->addr, 4)), + skb->len + 2); + txdesc->addr = dma_map_single(&ndev->dev, skb->data, skb->len, + DMA_TO_DEVICE); + if (skb->len < ETH_ZLEN) + txdesc->buffer_length = ETH_ZLEN; + else + txdesc->buffer_length = skb->len; + + if (entry >= mdp->num_tx_ring - 1) + txdesc->status |= cpu_to_edmac(mdp, TD_TACT | TD_TDLE); + else + txdesc->status |= cpu_to_edmac(mdp, 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; +} + +/* device close function */ +static int sh_eth_close(struct net_device *ndev) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + + netif_stop_queue(ndev); + + /* Disable interrupts by clearing the interrupt mask. */ + sh_eth_write(ndev, 0x0000, EESIPR); + + /* Stop the chip's Tx and Rx processes. */ + sh_eth_write(ndev, 0, EDTRR); + sh_eth_write(ndev, 0, EDRRR); + + /* PHY Disconnect */ + if (mdp->phydev) { + phy_stop(mdp->phydev); + phy_disconnect(mdp->phydev); + } + + free_irq(ndev->irq, ndev); + + napi_disable(&mdp->napi); + + /* Free all the skbuffs in the Rx queue. */ + sh_eth_ring_free(ndev); + + /* free DMA buffer */ + sh_eth_free_dma_buffer(mdp); + + pm_runtime_put_sync(&mdp->pdev->dev); + + return 0; +} + +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; + + pm_runtime_get_sync(&mdp->pdev->dev); + + ndev->stats.tx_dropped += sh_eth_read(ndev, TROCR); + sh_eth_write(ndev, 0, TROCR); /* (write clear) */ + ndev->stats.collisions += sh_eth_read(ndev, CDCR); + sh_eth_write(ndev, 0, CDCR); /* (write clear) */ + ndev->stats.tx_carrier_errors += sh_eth_read(ndev, LCCR); + sh_eth_write(ndev, 0, LCCR); /* (write clear) */ + if (sh_eth_is_gether(mdp)) { + ndev->stats.tx_carrier_errors += sh_eth_read(ndev, CERCR); + sh_eth_write(ndev, 0, CERCR); /* (write clear) */ + ndev->stats.tx_carrier_errors += sh_eth_read(ndev, CEECR); + sh_eth_write(ndev, 0, CEECR); /* (write clear) */ + } else { + ndev->stats.tx_carrier_errors += sh_eth_read(ndev, CNDCR); + sh_eth_write(ndev, 0, CNDCR); /* (write clear) */ + } + pm_runtime_put_sync(&mdp->pdev->dev); + + return &ndev->stats; +} + +/* ioctl to device function */ +static int sh_eth_do_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) +{ + struct sh_eth_private *mdp = netdev_priv(ndev); + struct phy_device *phydev = mdp->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 (unlikely(!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 (unlikely(!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); + } +} + +/* Multicast reception directions set */ +static void sh_eth_set_multicast_list(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) | 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; + } + } + } + } else { + /* Normal, unicast/broadcast-only mode. */ + ecmr_bits = (ecmr_bits & ~ECMR_PRM) | ECMR_MCT; + } + + /* 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 */ + 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, i; + 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->mdi_msk = PIR_MDI; + bitbang->mdo_msk = PIR_MDO; + bitbang->mmd_msk = PIR_MMD; + bitbang->mdc_msk = PIR_MDC; + 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); + + /* PHY IRQ */ + mdp->mii_bus->irq = devm_kmalloc_array(dev, PHY_MAX_ADDR, sizeof(int), + GFP_KERNEL); + if (!mdp->mii_bus->irq) { + ret = -ENOMEM; + goto out_free_bus; + } + + /* register MDIO bus */ + if (dev->of_node) { + ret = of_mdiobus_register(mdp->mii_bus, dev->of_node); + } else { + for (i = 0; i < PHY_MAX_ADDR; i++) + mdp->mii_bus->irq[i] = PHY_POLL; + 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; + default: + 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_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_multicast_list, + .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; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return NULL; + + pdata->phy_interface = of_get_phy_mode(np); + + 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-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-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) +{ + int ret, devno = 0; + struct resource *res; + struct net_device *ndev = NULL; + struct sh_eth_private *mdp = NULL; + struct sh_eth_plat_data *pd = dev_get_platdata(&pdev->dev); + const struct platform_device_id *id = platform_get_device_id(pdev); + + /* get base addr */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (unlikely(res == NULL)) { + dev_err(&pdev->dev, "invalid resource\n"); + return -EINVAL; + } + + ndev = alloc_etherdev(sizeof(struct sh_eth_private)); + if (!ndev) + return -ENOMEM; + + pm_runtime_enable(&pdev->dev); + pm_runtime_get_sync(&pdev->dev); + + /* The sh Ether-specific entries in the device structure. */ + ndev->base_addr = res->start; + devno = pdev->id; + if (devno < 0) + devno = 0; + + ndev->dma = -1; + ret = platform_get_irq(pdev, 0); + if (ret < 0) { + ret = -ENODEV; + 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; + } + + 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; + /* EDMAC endian */ + mdp->edmac_endian = pd->edmac_endian; + 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 { + const struct of_device_id *match; + + match = of_match_device(of_match_ptr(sh_eth_match_table), + &pdev->dev); + mdp->cd = (struct sh_eth_cpu_data *)match->data; + } + 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); + mdp->tsu_addr = devm_ioremap_resource(&pdev->dev, rtsu); + if (IS_ERR(mdp->tsu_addr)) { + ret = PTR_ERR(mdp->tsu_addr); + goto out_release; + } + mdp->port = devno % 2; + ndev->features = NETIF_F_HW_VLAN_CTAG_FILTER; + } + + /* initialize first or needed device */ + if (!devno || pd->needs_init) { + if (mdp->cd->chip_reset) + mdp->cd->chip_reset(ndev); + + if (mdp->cd->tsu) { + /* TSU init (Init only)*/ + sh_eth_tsu_init(mdp); + } + } + + /* MDIO bus init */ + ret = sh_mdio_init(mdp, pd); + if (ret) { + dev_err(&ndev->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 +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 = { + .runtime_suspend = sh_eth_runtime_nop, + .runtime_resume = sh_eth_runtime_nop, +}; +#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 }, + { "r7s72100-ether", (kernel_ulong_t)&r7s72100_data }, + { "r8a7740-gether", (kernel_ulong_t)&r8a7740_data }, + { "r8a777x-ether", (kernel_ulong_t)&r8a777x_data }, + { "r8a7790-ether", (kernel_ulong_t)&r8a779x_data }, + { "r8a7791-ether", (kernel_ulong_t)&r8a779x_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"); |