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Diffstat (limited to 'drivers/net/sb1250-mac.c')
| -rw-r--r-- | drivers/net/sb1250-mac.c | 2920 |
1 files changed, 2920 insertions, 0 deletions
diff --git a/drivers/net/sb1250-mac.c b/drivers/net/sb1250-mac.c new file mode 100644 index 00000000000..fd2e7c37490 --- /dev/null +++ b/drivers/net/sb1250-mac.c @@ -0,0 +1,2920 @@ +/* + * Copyright (C) 2001,2002,2003 Broadcom Corporation + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * + * This driver is designed for the Broadcom SiByte SOC built-in + * Ethernet controllers. Written by Mitch Lichtenberg at Broadcom Corp. + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/init.h> +#include <linux/config.h> +#include <linux/bitops.h> +#include <asm/processor.h> /* Processor type for cache alignment. */ +#include <asm/io.h> +#include <asm/cache.h> + +/* This is only here until the firmware is ready. In that case, + the firmware leaves the ethernet address in the register for us. */ +#ifdef CONFIG_SIBYTE_STANDALONE +#define SBMAC_ETH0_HWADDR "40:00:00:00:01:00" +#define SBMAC_ETH1_HWADDR "40:00:00:00:01:01" +#define SBMAC_ETH2_HWADDR "40:00:00:00:01:02" +#endif + + +/* These identify the driver base version and may not be removed. */ +#if 0 +static char version1[] __devinitdata = +"sb1250-mac.c:1.00 1/11/2001 Written by Mitch Lichtenberg\n"; +#endif + + +/* Operational parameters that usually are not changed. */ + +#define CONFIG_SBMAC_COALESCE + +#define MAX_UNITS 3 /* More are supported, limit only on options */ + +/* Time in jiffies before concluding the transmitter is hung. */ +#define TX_TIMEOUT (2*HZ) + + +MODULE_AUTHOR("Mitch Lichtenberg (Broadcom Corp.)"); +MODULE_DESCRIPTION("Broadcom SiByte SOC GB Ethernet driver"); + +/* A few user-configurable values which may be modified when a driver + module is loaded. */ + +/* 1 normal messages, 0 quiet .. 7 verbose. */ +static int debug = 1; +module_param(debug, int, S_IRUGO); +MODULE_PARM_DESC(debug, "Debug messages"); + +/* mii status msgs */ +static int noisy_mii = 1; +module_param(noisy_mii, int, S_IRUGO); +MODULE_PARM_DESC(noisy_mii, "MII status messages"); + +/* Used to pass the media type, etc. + Both 'options[]' and 'full_duplex[]' should exist for driver + interoperability. + The media type is usually passed in 'options[]'. +*/ +#ifdef MODULE +static int options[MAX_UNITS] = {-1, -1, -1}; +module_param_array(options, int, NULL, S_IRUGO); +MODULE_PARM_DESC(options, "1-" __MODULE_STRING(MAX_UNITS)); + +static int full_duplex[MAX_UNITS] = {-1, -1, -1}; +module_param_array(full_duplex, int, NULL, S_IRUGO); +MODULE_PARM_DESC(full_duplex, "1-" __MODULE_STRING(MAX_UNITS)); +#endif + +#ifdef CONFIG_SBMAC_COALESCE +static int int_pktcnt = 0; +module_param(int_pktcnt, int, S_IRUGO); +MODULE_PARM_DESC(int_pktcnt, "Packet count"); + +static int int_timeout = 0; +module_param(int_timeout, int, S_IRUGO); +MODULE_PARM_DESC(int_timeout, "Timeout value"); +#endif + +#include <asm/sibyte/sb1250.h> +#include <asm/sibyte/sb1250_defs.h> +#include <asm/sibyte/sb1250_regs.h> +#include <asm/sibyte/sb1250_mac.h> +#include <asm/sibyte/sb1250_dma.h> +#include <asm/sibyte/sb1250_int.h> +#include <asm/sibyte/sb1250_scd.h> + + +/********************************************************************** + * Simple types + ********************************************************************* */ + + +typedef unsigned long sbmac_port_t; + +typedef enum { sbmac_speed_auto, sbmac_speed_10, + sbmac_speed_100, sbmac_speed_1000 } sbmac_speed_t; + +typedef enum { sbmac_duplex_auto, sbmac_duplex_half, + sbmac_duplex_full } sbmac_duplex_t; + +typedef enum { sbmac_fc_auto, sbmac_fc_disabled, sbmac_fc_frame, + sbmac_fc_collision, sbmac_fc_carrier } sbmac_fc_t; + +typedef enum { sbmac_state_uninit, sbmac_state_off, sbmac_state_on, + sbmac_state_broken } sbmac_state_t; + + +/********************************************************************** + * Macros + ********************************************************************* */ + + +#define SBDMA_NEXTBUF(d,f) ((((d)->f+1) == (d)->sbdma_dscrtable_end) ? \ + (d)->sbdma_dscrtable : (d)->f+1) + + +#define NUMCACHEBLKS(x) (((x)+SMP_CACHE_BYTES-1)/SMP_CACHE_BYTES) + +#define SBMAC_READCSR(t) __raw_readq((unsigned long)t) +#define SBMAC_WRITECSR(t,v) __raw_writeq(v, (unsigned long)t) + + +#define SBMAC_MAX_TXDESCR 32 +#define SBMAC_MAX_RXDESCR 32 + +#define ETHER_ALIGN 2 +#define ETHER_ADDR_LEN 6 +#define ENET_PACKET_SIZE 1518 +/*#define ENET_PACKET_SIZE 9216 */ + +/********************************************************************** + * DMA Descriptor structure + ********************************************************************* */ + +typedef struct sbdmadscr_s { + uint64_t dscr_a; + uint64_t dscr_b; +} sbdmadscr_t; + +typedef unsigned long paddr_t; + +/********************************************************************** + * DMA Controller structure + ********************************************************************* */ + +typedef struct sbmacdma_s { + + /* + * This stuff is used to identify the channel and the registers + * associated with it. + */ + + struct sbmac_softc *sbdma_eth; /* back pointer to associated MAC */ + int sbdma_channel; /* channel number */ + int sbdma_txdir; /* direction (1=transmit) */ + int sbdma_maxdescr; /* total # of descriptors in ring */ +#ifdef CONFIG_SBMAC_COALESCE + int sbdma_int_pktcnt; /* # descriptors rx/tx before interrupt*/ + int sbdma_int_timeout; /* # usec rx/tx interrupt */ +#endif + + sbmac_port_t sbdma_config0; /* DMA config register 0 */ + sbmac_port_t sbdma_config1; /* DMA config register 1 */ + sbmac_port_t sbdma_dscrbase; /* Descriptor base address */ + sbmac_port_t sbdma_dscrcnt; /* Descriptor count register */ + sbmac_port_t sbdma_curdscr; /* current descriptor address */ + + /* + * This stuff is for maintenance of the ring + */ + + sbdmadscr_t *sbdma_dscrtable; /* base of descriptor table */ + sbdmadscr_t *sbdma_dscrtable_end; /* end of descriptor table */ + + struct sk_buff **sbdma_ctxtable; /* context table, one per descr */ + + paddr_t sbdma_dscrtable_phys; /* and also the phys addr */ + sbdmadscr_t *sbdma_addptr; /* next dscr for sw to add */ + sbdmadscr_t *sbdma_remptr; /* next dscr for sw to remove */ +} sbmacdma_t; + + +/********************************************************************** + * Ethernet softc structure + ********************************************************************* */ + +struct sbmac_softc { + + /* + * Linux-specific things + */ + + struct net_device *sbm_dev; /* pointer to linux device */ + spinlock_t sbm_lock; /* spin lock */ + struct timer_list sbm_timer; /* for monitoring MII */ + struct net_device_stats sbm_stats; + int sbm_devflags; /* current device flags */ + + int sbm_phy_oldbmsr; + int sbm_phy_oldanlpar; + int sbm_phy_oldk1stsr; + int sbm_phy_oldlinkstat; + int sbm_buffersize; + + unsigned char sbm_phys[2]; + + /* + * Controller-specific things + */ + + unsigned long sbm_base; /* MAC's base address */ + sbmac_state_t sbm_state; /* current state */ + + sbmac_port_t sbm_macenable; /* MAC Enable Register */ + sbmac_port_t sbm_maccfg; /* MAC Configuration Register */ + sbmac_port_t sbm_fifocfg; /* FIFO configuration register */ + sbmac_port_t sbm_framecfg; /* Frame configuration register */ + sbmac_port_t sbm_rxfilter; /* receive filter register */ + sbmac_port_t sbm_isr; /* Interrupt status register */ + sbmac_port_t sbm_imr; /* Interrupt mask register */ + sbmac_port_t sbm_mdio; /* MDIO register */ + + sbmac_speed_t sbm_speed; /* current speed */ + sbmac_duplex_t sbm_duplex; /* current duplex */ + sbmac_fc_t sbm_fc; /* current flow control setting */ + + unsigned char sbm_hwaddr[ETHER_ADDR_LEN]; + + sbmacdma_t sbm_txdma; /* for now, only use channel 0 */ + sbmacdma_t sbm_rxdma; + int rx_hw_checksum; + int sbe_idx; +}; + + +/********************************************************************** + * Externs + ********************************************************************* */ + +/********************************************************************** + * Prototypes + ********************************************************************* */ + +static void sbdma_initctx(sbmacdma_t *d, + struct sbmac_softc *s, + int chan, + int txrx, + int maxdescr); +static void sbdma_channel_start(sbmacdma_t *d, int rxtx); +static int sbdma_add_rcvbuffer(sbmacdma_t *d,struct sk_buff *m); +static int sbdma_add_txbuffer(sbmacdma_t *d,struct sk_buff *m); +static void sbdma_emptyring(sbmacdma_t *d); +static void sbdma_fillring(sbmacdma_t *d); +static void sbdma_rx_process(struct sbmac_softc *sc,sbmacdma_t *d); +static void sbdma_tx_process(struct sbmac_softc *sc,sbmacdma_t *d); +static int sbmac_initctx(struct sbmac_softc *s); +static void sbmac_channel_start(struct sbmac_softc *s); +static void sbmac_channel_stop(struct sbmac_softc *s); +static sbmac_state_t sbmac_set_channel_state(struct sbmac_softc *,sbmac_state_t); +static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff); +static uint64_t sbmac_addr2reg(unsigned char *ptr); +static irqreturn_t sbmac_intr(int irq,void *dev_instance,struct pt_regs *rgs); +static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev); +static void sbmac_setmulti(struct sbmac_softc *sc); +static int sbmac_init(struct net_device *dev, int idx); +static int sbmac_set_speed(struct sbmac_softc *s,sbmac_speed_t speed); +static int sbmac_set_duplex(struct sbmac_softc *s,sbmac_duplex_t duplex,sbmac_fc_t fc); + +static int sbmac_open(struct net_device *dev); +static void sbmac_timer(unsigned long data); +static void sbmac_tx_timeout (struct net_device *dev); +static struct net_device_stats *sbmac_get_stats(struct net_device *dev); +static void sbmac_set_rx_mode(struct net_device *dev); +static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); +static int sbmac_close(struct net_device *dev); +static int sbmac_mii_poll(struct sbmac_softc *s,int noisy); + +static void sbmac_mii_sync(struct sbmac_softc *s); +static void sbmac_mii_senddata(struct sbmac_softc *s,unsigned int data, int bitcnt); +static unsigned int sbmac_mii_read(struct sbmac_softc *s,int phyaddr,int regidx); +static void sbmac_mii_write(struct sbmac_softc *s,int phyaddr,int regidx, + unsigned int regval); + + +/********************************************************************** + * Globals + ********************************************************************* */ + +static uint64_t sbmac_orig_hwaddr[MAX_UNITS]; + + +/********************************************************************** + * MDIO constants + ********************************************************************* */ + +#define MII_COMMAND_START 0x01 +#define MII_COMMAND_READ 0x02 +#define MII_COMMAND_WRITE 0x01 +#define MII_COMMAND_ACK 0x02 + +#define BMCR_RESET 0x8000 +#define BMCR_LOOPBACK 0x4000 +#define BMCR_SPEED0 0x2000 +#define BMCR_ANENABLE 0x1000 +#define BMCR_POWERDOWN 0x0800 +#define BMCR_ISOLATE 0x0400 +#define BMCR_RESTARTAN 0x0200 +#define BMCR_DUPLEX 0x0100 +#define BMCR_COLTEST 0x0080 +#define BMCR_SPEED1 0x0040 +#define BMCR_SPEED1000 BMCR_SPEED1 +#define BMCR_SPEED100 BMCR_SPEED0 +#define BMCR_SPEED10 0 + +#define BMSR_100BT4 0x8000 +#define BMSR_100BT_FDX 0x4000 +#define BMSR_100BT_HDX 0x2000 +#define BMSR_10BT_FDX 0x1000 +#define BMSR_10BT_HDX 0x0800 +#define BMSR_100BT2_FDX 0x0400 +#define BMSR_100BT2_HDX 0x0200 +#define BMSR_1000BT_XSR 0x0100 +#define BMSR_PRESUP 0x0040 +#define BMSR_ANCOMPLT 0x0020 +#define BMSR_REMFAULT 0x0010 +#define BMSR_AUTONEG 0x0008 +#define BMSR_LINKSTAT 0x0004 +#define BMSR_JABDETECT 0x0002 +#define BMSR_EXTCAPAB 0x0001 + +#define PHYIDR1 0x2000 +#define PHYIDR2 0x5C60 + +#define ANAR_NP 0x8000 +#define ANAR_RF 0x2000 +#define ANAR_ASYPAUSE 0x0800 +#define ANAR_PAUSE 0x0400 +#define ANAR_T4 0x0200 +#define ANAR_TXFD 0x0100 +#define ANAR_TXHD 0x0080 +#define ANAR_10FD 0x0040 +#define ANAR_10HD 0x0020 +#define ANAR_PSB 0x0001 + +#define ANLPAR_NP 0x8000 +#define ANLPAR_ACK 0x4000 +#define ANLPAR_RF 0x2000 +#define ANLPAR_ASYPAUSE 0x0800 +#define ANLPAR_PAUSE 0x0400 +#define ANLPAR_T4 0x0200 +#define ANLPAR_TXFD 0x0100 +#define ANLPAR_TXHD 0x0080 +#define ANLPAR_10FD 0x0040 +#define ANLPAR_10HD 0x0020 +#define ANLPAR_PSB 0x0001 /* 802.3 */ + +#define ANER_PDF 0x0010 +#define ANER_LPNPABLE 0x0008 +#define ANER_NPABLE 0x0004 +#define ANER_PAGERX 0x0002 +#define ANER_LPANABLE 0x0001 + +#define ANNPTR_NP 0x8000 +#define ANNPTR_MP 0x2000 +#define ANNPTR_ACK2 0x1000 +#define ANNPTR_TOGTX 0x0800 +#define ANNPTR_CODE 0x0008 + +#define ANNPRR_NP 0x8000 +#define ANNPRR_MP 0x2000 +#define ANNPRR_ACK3 0x1000 +#define ANNPRR_TOGTX 0x0800 +#define ANNPRR_CODE 0x0008 + +#define K1TCR_TESTMODE 0x0000 +#define K1TCR_MSMCE 0x1000 +#define K1TCR_MSCV 0x0800 +#define K1TCR_RPTR 0x0400 +#define K1TCR_1000BT_FDX 0x200 +#define K1TCR_1000BT_HDX 0x100 + +#define K1STSR_MSMCFLT 0x8000 +#define K1STSR_MSCFGRES 0x4000 +#define K1STSR_LRSTAT 0x2000 +#define K1STSR_RRSTAT 0x1000 +#define K1STSR_LP1KFD 0x0800 +#define K1STSR_LP1KHD 0x0400 +#define K1STSR_LPASMDIR 0x0200 + +#define K1SCR_1KX_FDX 0x8000 +#define K1SCR_1KX_HDX 0x4000 +#define K1SCR_1KT_FDX 0x2000 +#define K1SCR_1KT_HDX 0x1000 + +#define STRAP_PHY1 0x0800 +#define STRAP_NCMODE 0x0400 +#define STRAP_MANMSCFG 0x0200 +#define STRAP_ANENABLE 0x0100 +#define STRAP_MSVAL 0x0080 +#define STRAP_1KHDXADV 0x0010 +#define STRAP_1KFDXADV 0x0008 +#define STRAP_100ADV 0x0004 +#define STRAP_SPEEDSEL 0x0000 +#define STRAP_SPEED100 0x0001 + +#define PHYSUP_SPEED1000 0x10 +#define PHYSUP_SPEED100 0x08 +#define PHYSUP_SPEED10 0x00 +#define PHYSUP_LINKUP 0x04 +#define PHYSUP_FDX 0x02 + +#define MII_BMCR 0x00 /* Basic mode control register (rw) */ +#define MII_BMSR 0x01 /* Basic mode status register (ro) */ +#define MII_K1STSR 0x0A /* 1K Status Register (ro) */ +#define MII_ANLPAR 0x05 /* Autonegotiation lnk partner abilities (rw) */ + + +#define M_MAC_MDIO_DIR_OUTPUT 0 /* for clarity */ + +#define ENABLE 1 +#define DISABLE 0 + +/********************************************************************** + * SBMAC_MII_SYNC(s) + * + * Synchronize with the MII - send a pattern of bits to the MII + * that will guarantee that it is ready to accept a command. + * + * Input parameters: + * s - sbmac structure + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbmac_mii_sync(struct sbmac_softc *s) +{ + int cnt; + uint64_t bits; + int mac_mdio_genc; + + mac_mdio_genc = SBMAC_READCSR(s->sbm_mdio) & M_MAC_GENC; + + bits = M_MAC_MDIO_DIR_OUTPUT | M_MAC_MDIO_OUT; + + SBMAC_WRITECSR(s->sbm_mdio,bits | mac_mdio_genc); + + for (cnt = 0; cnt < 32; cnt++) { + SBMAC_WRITECSR(s->sbm_mdio,bits | M_MAC_MDC | mac_mdio_genc); + SBMAC_WRITECSR(s->sbm_mdio,bits | mac_mdio_genc); + } +} + +/********************************************************************** + * SBMAC_MII_SENDDATA(s,data,bitcnt) + * + * Send some bits to the MII. The bits to be sent are right- + * justified in the 'data' parameter. + * + * Input parameters: + * s - sbmac structure + * data - data to send + * bitcnt - number of bits to send + ********************************************************************* */ + +static void sbmac_mii_senddata(struct sbmac_softc *s,unsigned int data, int bitcnt) +{ + int i; + uint64_t bits; + unsigned int curmask; + int mac_mdio_genc; + + mac_mdio_genc = SBMAC_READCSR(s->sbm_mdio) & M_MAC_GENC; + + bits = M_MAC_MDIO_DIR_OUTPUT; + SBMAC_WRITECSR(s->sbm_mdio,bits | mac_mdio_genc); + + curmask = 1 << (bitcnt - 1); + + for (i = 0; i < bitcnt; i++) { + if (data & curmask) + bits |= M_MAC_MDIO_OUT; + else bits &= ~M_MAC_MDIO_OUT; + SBMAC_WRITECSR(s->sbm_mdio,bits | mac_mdio_genc); + SBMAC_WRITECSR(s->sbm_mdio,bits | M_MAC_MDC | mac_mdio_genc); + SBMAC_WRITECSR(s->sbm_mdio,bits | mac_mdio_genc); + curmask >>= 1; + } +} + + + +/********************************************************************** + * SBMAC_MII_READ(s,phyaddr,regidx) + * + * Read a PHY register. + * + * Input parameters: + * s - sbmac structure + * phyaddr - PHY's address + * regidx = index of register to read + * + * Return value: + * value read, or 0 if an error occurred. + ********************************************************************* */ + +static unsigned int sbmac_mii_read(struct sbmac_softc *s,int phyaddr,int regidx) +{ + int idx; + int error; + int regval; + int mac_mdio_genc; + + /* + * Synchronize ourselves so that the PHY knows the next + * thing coming down is a command + */ + + sbmac_mii_sync(s); + + /* + * Send the data to the PHY. The sequence is + * a "start" command (2 bits) + * a "read" command (2 bits) + * the PHY addr (5 bits) + * the register index (5 bits) + */ + + sbmac_mii_senddata(s,MII_COMMAND_START, 2); + sbmac_mii_senddata(s,MII_COMMAND_READ, 2); + sbmac_mii_senddata(s,phyaddr, 5); + sbmac_mii_senddata(s,regidx, 5); + + mac_mdio_genc = SBMAC_READCSR(s->sbm_mdio) & M_MAC_GENC; + + /* + * Switch the port around without a clock transition. + */ + SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT | mac_mdio_genc); + + /* + * Send out a clock pulse to signal we want the status + */ + + SBMAC_WRITECSR(s->sbm_mdio, + M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc); + SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT | mac_mdio_genc); + + /* + * If an error occurred, the PHY will signal '1' back + */ + error = SBMAC_READCSR(s->sbm_mdio) & M_MAC_MDIO_IN; + + /* + * Issue an 'idle' clock pulse, but keep the direction + * the same. + */ + SBMAC_WRITECSR(s->sbm_mdio, + M_MAC_MDIO_DIR_INPUT | M_MAC_MDC | mac_mdio_genc); + SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_INPUT | mac_mdio_genc); + + regval = 0; + + for (idx = 0; idx < 16; idx++) { + regval <<= 1; + + if (error == 0) { + if (SBMAC_READCSR(s->sbm_mdio) & M_MAC_MDIO_IN) + regval |= 1; + } + + SBMAC_WRITECSR(s->sbm_mdio, + M_MAC_MDIO_DIR_INPUT|M_MAC_MDC | mac_mdio_genc); + SBMAC_WRITECSR(s->sbm_mdio, + M_MAC_MDIO_DIR_INPUT | mac_mdio_genc); + } + + /* Switch back to output */ + SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc); + + if (error == 0) + return regval; + return 0; +} + + +/********************************************************************** + * SBMAC_MII_WRITE(s,phyaddr,regidx,regval) + * + * Write a value to a PHY register. + * + * Input parameters: + * s - sbmac structure + * phyaddr - PHY to use + * regidx - register within the PHY + * regval - data to write to register + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbmac_mii_write(struct sbmac_softc *s,int phyaddr,int regidx, + unsigned int regval) +{ + int mac_mdio_genc; + + sbmac_mii_sync(s); + + sbmac_mii_senddata(s,MII_COMMAND_START,2); + sbmac_mii_senddata(s,MII_COMMAND_WRITE,2); + sbmac_mii_senddata(s,phyaddr, 5); + sbmac_mii_senddata(s,regidx, 5); + sbmac_mii_senddata(s,MII_COMMAND_ACK,2); + sbmac_mii_senddata(s,regval,16); + + mac_mdio_genc = SBMAC_READCSR(s->sbm_mdio) & M_MAC_GENC; + + SBMAC_WRITECSR(s->sbm_mdio,M_MAC_MDIO_DIR_OUTPUT | mac_mdio_genc); +} + + + +/********************************************************************** + * SBDMA_INITCTX(d,s,chan,txrx,maxdescr) + * + * Initialize a DMA channel context. Since there are potentially + * eight DMA channels per MAC, it's nice to do this in a standard + * way. + * + * Input parameters: + * d - sbmacdma_t structure (DMA channel context) + * s - sbmac_softc structure (pointer to a MAC) + * chan - channel number (0..1 right now) + * txrx - Identifies DMA_TX or DMA_RX for channel direction + * maxdescr - number of descriptors + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbdma_initctx(sbmacdma_t *d, + struct sbmac_softc *s, + int chan, + int txrx, + int maxdescr) +{ + /* + * Save away interesting stuff in the structure + */ + + d->sbdma_eth = s; + d->sbdma_channel = chan; + d->sbdma_txdir = txrx; + +#if 0 + /* RMON clearing */ + s->sbe_idx =(s->sbm_base - A_MAC_BASE_0)/MAC_SPACING; +#endif + + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_BYTES)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_COLLISIONS)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_LATE_COL)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_EX_COL)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_FCS_ERROR)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_ABORT)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_BAD)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_GOOD)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_RUNT)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_TX_OVERSIZE)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_BYTES)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_MCAST)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_BCAST)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_BAD)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_GOOD)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_RUNT)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_OVERSIZE)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_FCS_ERROR)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_LENGTH_ERROR)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_CODE_ERROR)), 0); + SBMAC_WRITECSR(IOADDR( + A_MAC_REGISTER(s->sbe_idx, R_MAC_RMON_RX_ALIGN_ERROR)), 0); + + /* + * initialize register pointers + */ + + d->sbdma_config0 = + s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG0); + d->sbdma_config1 = + s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CONFIG1); + d->sbdma_dscrbase = + s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_BASE); + d->sbdma_dscrcnt = + s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_DSCR_CNT); + d->sbdma_curdscr = + s->sbm_base + R_MAC_DMA_REGISTER(txrx,chan,R_MAC_DMA_CUR_DSCRADDR); + + /* + * Allocate memory for the ring + */ + + d->sbdma_maxdescr = maxdescr; + + d->sbdma_dscrtable = (sbdmadscr_t *) + kmalloc(d->sbdma_maxdescr*sizeof(sbdmadscr_t), GFP_KERNEL); + + memset(d->sbdma_dscrtable,0,d->sbdma_maxdescr*sizeof(sbdmadscr_t)); + + d->sbdma_dscrtable_end = d->sbdma_dscrtable + d->sbdma_maxdescr; + + d->sbdma_dscrtable_phys = virt_to_phys(d->sbdma_dscrtable); + + /* + * And context table + */ + + d->sbdma_ctxtable = (struct sk_buff **) + kmalloc(d->sbdma_maxdescr*sizeof(struct sk_buff *), GFP_KERNEL); + + memset(d->sbdma_ctxtable,0,d->sbdma_maxdescr*sizeof(struct sk_buff *)); + +#ifdef CONFIG_SBMAC_COALESCE + /* + * Setup Rx/Tx DMA coalescing defaults + */ + + if ( int_pktcnt ) { + d->sbdma_int_pktcnt = int_pktcnt; + } else { + d->sbdma_int_pktcnt = 1; + } + + if ( int_timeout ) { + d->sbdma_int_timeout = int_timeout; + } else { + d->sbdma_int_timeout = 0; + } +#endif + +} + +/********************************************************************** + * SBDMA_CHANNEL_START(d) + * + * Initialize the hardware registers for a DMA channel. + * + * Input parameters: + * d - DMA channel to init (context must be previously init'd + * rxtx - DMA_RX or DMA_TX depending on what type of channel + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbdma_channel_start(sbmacdma_t *d, int rxtx ) +{ + /* + * Turn on the DMA channel + */ + +#ifdef CONFIG_SBMAC_COALESCE + SBMAC_WRITECSR(d->sbdma_config1, + V_DMA_INT_TIMEOUT(d->sbdma_int_timeout) | + 0); + SBMAC_WRITECSR(d->sbdma_config0, + M_DMA_EOP_INT_EN | + V_DMA_RINGSZ(d->sbdma_maxdescr) | + V_DMA_INT_PKTCNT(d->sbdma_int_pktcnt) | + 0); +#else + SBMAC_WRITECSR(d->sbdma_config1,0); + SBMAC_WRITECSR(d->sbdma_config0, + V_DMA_RINGSZ(d->sbdma_maxdescr) | + 0); +#endif + + SBMAC_WRITECSR(d->sbdma_dscrbase,d->sbdma_dscrtable_phys); + + /* + * Initialize ring pointers + */ + + d->sbdma_addptr = d->sbdma_dscrtable; + d->sbdma_remptr = d->sbdma_dscrtable; +} + +/********************************************************************** + * SBDMA_CHANNEL_STOP(d) + * + * Initialize the hardware registers for a DMA channel. + * + * Input parameters: + * d - DMA channel to init (context must be previously init'd + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbdma_channel_stop(sbmacdma_t *d) +{ + /* + * Turn off the DMA channel + */ + + SBMAC_WRITECSR(d->sbdma_config1,0); + + SBMAC_WRITECSR(d->sbdma_dscrbase,0); + + SBMAC_WRITECSR(d->sbdma_config0,0); + + /* + * Zero ring pointers + */ + + d->sbdma_addptr = 0; + d->sbdma_remptr = 0; +} + +static void sbdma_align_skb(struct sk_buff *skb,int power2,int offset) +{ + unsigned long addr; + unsigned long newaddr; + + addr = (unsigned long) skb->data; + + newaddr = (addr + power2 - 1) & ~(power2 - 1); + + skb_reserve(skb,newaddr-addr+offset); +} + + +/********************************************************************** + * SBDMA_ADD_RCVBUFFER(d,sb) + * + * Add a buffer to the specified DMA channel. For receive channels, + * this queues a buffer for inbound packets. + * + * Input parameters: + * d - DMA channel descriptor + * sb - sk_buff to add, or NULL if we should allocate one + * + * Return value: + * 0 if buffer could not be added (ring is full) + * 1 if buffer added successfully + ********************************************************************* */ + + +static int sbdma_add_rcvbuffer(sbmacdma_t *d,struct sk_buff *sb) +{ + sbdmadscr_t *dsc; + sbdmadscr_t *nextdsc; + struct sk_buff *sb_new = NULL; + int pktsize = ENET_PACKET_SIZE; + + /* get pointer to our current place in the ring */ + + dsc = d->sbdma_addptr; + nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr); + + /* + * figure out if the ring is full - if the next descriptor + * is the same as the one that we're going to remove from + * the ring, the ring is full + */ + + if (nextdsc == d->sbdma_remptr) { + return -ENOSPC; + } + + /* + * Allocate a sk_buff if we don't already have one. + * If we do have an sk_buff, reset it so that it's empty. + * + * Note: sk_buffs don't seem to be guaranteed to have any sort + * of alignment when they are allocated. Therefore, allocate enough + * extra space to make sure that: + * + * 1. the data does not start in the middle of a cache line. + * 2. The data does not end in the middle of a cache line + * 3. The buffer can be aligned such that the IP addresses are + * naturally aligned. + * + * Remember, the SOCs MAC writes whole cache lines at a time, + * without reading the old contents first. So, if the sk_buff's + * data portion starts in the middle of a cache line, the SOC + * DMA will trash the beginning (and ending) portions. + */ + + if (sb == NULL) { + sb_new = dev_alloc_skb(ENET_PACKET_SIZE + SMP_CACHE_BYTES * 2 + ETHER_ALIGN); + if (sb_new == NULL) { + printk(KERN_INFO "%s: sk_buff allocation failed\n", + d->sbdma_eth->sbm_dev->name); + return -ENOBUFS; + } + + sbdma_align_skb(sb_new, SMP_CACHE_BYTES, ETHER_ALIGN); + + /* mark skbuff owned by our device */ + sb_new->dev = d->sbdma_eth->sbm_dev; + } + else { + sb_new = sb; + /* + * nothing special to reinit buffer, it's already aligned + * and sb->data already points to a good place. + */ + } + + /* + * fill in the descriptor + */ + +#ifdef CONFIG_SBMAC_COALESCE + /* + * Do not interrupt per DMA transfer. + */ + dsc->dscr_a = virt_to_phys(sb_new->tail) | + V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize+ETHER_ALIGN)) | + 0; +#else + dsc->dscr_a = virt_to_phys(sb_new->tail) | + V_DMA_DSCRA_A_SIZE(NUMCACHEBLKS(pktsize+ETHER_ALIGN)) | + M_DMA_DSCRA_INTERRUPT; +#endif + + /* receiving: no options */ + dsc->dscr_b = 0; + + /* + * fill in the context + */ + + d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb_new; + + /* + * point at next packet + */ + + d->sbdma_addptr = nextdsc; + + /* + * Give the buffer to the DMA engine. + */ + + SBMAC_WRITECSR(d->sbdma_dscrcnt,1); + + return 0; /* we did it */ +} + +/********************************************************************** + * SBDMA_ADD_TXBUFFER(d,sb) + * + * Add a transmit buffer to the specified DMA channel, causing a + * transmit to start. + * + * Input parameters: + * d - DMA channel descriptor + * sb - sk_buff to add + * + * Return value: + * 0 transmit queued successfully + * otherwise error code + ********************************************************************* */ + + +static int sbdma_add_txbuffer(sbmacdma_t *d,struct sk_buff *sb) +{ + sbdmadscr_t *dsc; + sbdmadscr_t *nextdsc; + uint64_t phys; + uint64_t ncb; + int length; + + /* get pointer to our current place in the ring */ + + dsc = d->sbdma_addptr; + nextdsc = SBDMA_NEXTBUF(d,sbdma_addptr); + + /* + * figure out if the ring is full - if the next descriptor + * is the same as the one that we're going to remove from + * the ring, the ring is full + */ + + if (nextdsc == d->sbdma_remptr) { + return -ENOSPC; + } + + /* + * Under Linux, it's not necessary to copy/coalesce buffers + * like it is on NetBSD. We think they're all contiguous, + * but that may not be true for GBE. + */ + + length = sb->len; + + /* + * fill in the descriptor. Note that the number of cache + * blocks in the descriptor is the number of blocks + * *spanned*, so we need to add in the offset (if any) + * while doing the calculation. + */ + + phys = virt_to_phys(sb->data); + ncb = NUMCACHEBLKS(length+(phys & (SMP_CACHE_BYTES - 1))); + + dsc->dscr_a = phys | + V_DMA_DSCRA_A_SIZE(ncb) | +#ifndef CONFIG_SBMAC_COALESCE + M_DMA_DSCRA_INTERRUPT | +#endif + M_DMA_ETHTX_SOP; + + /* transmitting: set outbound options and length */ + + dsc->dscr_b = V_DMA_DSCRB_OPTIONS(K_DMA_ETHTX_APPENDCRC_APPENDPAD) | + V_DMA_DSCRB_PKT_SIZE(length); + + /* + * fill in the context + */ + + d->sbdma_ctxtable[dsc-d->sbdma_dscrtable] = sb; + + /* + * point at next packet + */ + + d->sbdma_addptr = nextdsc; + + /* + * Give the buffer to the DMA engine. + */ + + SBMAC_WRITECSR(d->sbdma_dscrcnt,1); + + return 0; /* we did it */ +} + + + + +/********************************************************************** + * SBDMA_EMPTYRING(d) + * + * Free all allocated sk_buffs on the specified DMA channel; + * + * Input parameters: + * d - DMA channel + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbdma_emptyring(sbmacdma_t *d) +{ + int idx; + struct sk_buff *sb; + + for (idx = 0; idx < d->sbdma_maxdescr; idx++) { + sb = d->sbdma_ctxtable[idx]; + if (sb) { + dev_kfree_skb(sb); + d->sbdma_ctxtable[idx] = NULL; + } + } +} + + +/********************************************************************** + * SBDMA_FILLRING(d) + * + * Fill the specified DMA channel (must be receive channel) + * with sk_buffs + * + * Input parameters: + * d - DMA channel + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbdma_fillring(sbmacdma_t *d) +{ + int idx; + + for (idx = 0; idx < SBMAC_MAX_RXDESCR-1; idx++) { + if (sbdma_add_rcvbuffer(d,NULL) != 0) + break; + } +} + + +/********************************************************************** + * SBDMA_RX_PROCESS(sc,d) + * + * Process "completed" receive buffers on the specified DMA channel. + * Note that this isn't really ideal for priority channels, since + * it processes all of the packets on a given channel before + * returning. + * + * Input parameters: + * sc - softc structure + * d - DMA channel context + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbdma_rx_process(struct sbmac_softc *sc,sbmacdma_t *d) +{ + int curidx; + int hwidx; + sbdmadscr_t *dsc; + struct sk_buff *sb; + int len; + + for (;;) { + /* + * figure out where we are (as an index) and where + * the hardware is (also as an index) + * + * This could be done faster if (for example) the + * descriptor table was page-aligned and contiguous in + * both virtual and physical memory -- you could then + * just compare the low-order bits of the virtual address + * (sbdma_remptr) and the physical address (sbdma_curdscr CSR) + */ + + curidx = d->sbdma_remptr - d->sbdma_dscrtable; + hwidx = (int) (((SBMAC_READCSR(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) - + d->sbdma_dscrtable_phys) / sizeof(sbdmadscr_t)); + + /* + * If they're the same, that means we've processed all + * of the descriptors up to (but not including) the one that + * the hardware is working on right now. + */ + + if (curidx == hwidx) + break; + + /* + * Otherwise, get the packet's sk_buff ptr back + */ + + dsc = &(d->sbdma_dscrtable[curidx]); + sb = d->sbdma_ctxtable[curidx]; + d->sbdma_ctxtable[curidx] = NULL; + + len = (int)G_DMA_DSCRB_PKT_SIZE(dsc->dscr_b) - 4; + + /* + * Check packet status. If good, process it. + * If not, silently drop it and put it back on the + * receive ring. + */ + + if (!(dsc->dscr_a & M_DMA_ETHRX_BAD)) { + + /* + * Add a new buffer to replace the old one. If we fail + * to allocate a buffer, we're going to drop this + * packet and put it right back on the receive ring. + */ + + if (sbdma_add_rcvbuffer(d,NULL) == -ENOBUFS) { + sc->sbm_stats.rx_dropped++; + sbdma_add_rcvbuffer(d,sb); /* re-add old buffer */ + } else { + /* + * Set length into the packet + */ + skb_put(sb,len); + + /* + * Buffer has been replaced on the + * receive ring. Pass the buffer to + * the kernel + */ + sc->sbm_stats.rx_bytes += len; + sc->sbm_stats.rx_packets++; + sb->protocol = eth_type_trans(sb,d->sbdma_eth->sbm_dev); + /* Check hw IPv4/TCP checksum if supported */ + if (sc->rx_hw_checksum == ENABLE) { + if (!((dsc->dscr_a) & M_DMA_ETHRX_BADIP4CS) && + !((dsc->dscr_a) & M_DMA_ETHRX_BADTCPCS)) { + sb->ip_summed = CHECKSUM_UNNECESSARY; + /* don't need to set sb->csum */ + } else { + sb->ip_summed = CHECKSUM_NONE; + } + } + + netif_rx(sb); + } + } else { + /* + * Packet was mangled somehow. Just drop it and + * put it back on the receive ring. + */ + sc->sbm_stats.rx_errors++; + sbdma_add_rcvbuffer(d,sb); + } + + + /* + * .. and advance to the next buffer. + */ + + d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr); + + } +} + + + +/********************************************************************** + * SBDMA_TX_PROCESS(sc,d) + * + * Process "completed" transmit buffers on the specified DMA channel. + * This is normally called within the interrupt service routine. + * Note that this isn't really ideal for priority channels, since + * it processes all of the packets on a given channel before + * returning. + * + * Input parameters: + * sc - softc structure + * d - DMA channel context + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbdma_tx_process(struct sbmac_softc *sc,sbmacdma_t *d) +{ + int curidx; + int hwidx; + sbdmadscr_t *dsc; + struct sk_buff *sb; + unsigned long flags; + + spin_lock_irqsave(&(sc->sbm_lock), flags); + + for (;;) { + /* + * figure out where we are (as an index) and where + * the hardware is (also as an index) + * + * This could be done faster if (for example) the + * descriptor table was page-aligned and contiguous in + * both virtual and physical memory -- you could then + * just compare the low-order bits of the virtual address + * (sbdma_remptr) and the physical address (sbdma_curdscr CSR) + */ + + curidx = d->sbdma_remptr - d->sbdma_dscrtable; + hwidx = (int) (((SBMAC_READCSR(d->sbdma_curdscr) & M_DMA_CURDSCR_ADDR) - + d->sbdma_dscrtable_phys) / sizeof(sbdmadscr_t)); + + /* + * If they're the same, that means we've processed all + * of the descriptors up to (but not including) the one that + * the hardware is working on right now. + */ + + if (curidx == hwidx) + break; + + /* + * Otherwise, get the packet's sk_buff ptr back + */ + + dsc = &(d->sbdma_dscrtable[curidx]); + sb = d->sbdma_ctxtable[curidx]; + d->sbdma_ctxtable[curidx] = NULL; + + /* + * Stats + */ + + sc->sbm_stats.tx_bytes += sb->len; + sc->sbm_stats.tx_packets++; + + /* + * for transmits, we just free buffers. + */ + + dev_kfree_skb_irq(sb); + + /* + * .. and advance to the next buffer. + */ + + d->sbdma_remptr = SBDMA_NEXTBUF(d,sbdma_remptr); + + } + + /* + * Decide if we should wake up the protocol or not. + * Other drivers seem to do this when we reach a low + * watermark on the transmit queue. + */ + + netif_wake_queue(d->sbdma_eth->sbm_dev); + + spin_unlock_irqrestore(&(sc->sbm_lock), flags); + +} + + + +/********************************************************************** + * SBMAC_INITCTX(s) + * + * Initialize an Ethernet context structure - this is called + * once per MAC on the 1250. Memory is allocated here, so don't + * call it again from inside the ioctl routines that bring the + * interface up/down + * + * Input parameters: + * s - sbmac context structure + * + * Return value: + * 0 + ********************************************************************* */ + +static int sbmac_initctx(struct sbmac_softc *s) +{ + + /* + * figure out the addresses of some ports + */ + + s->sbm_macenable = s->sbm_base + R_MAC_ENABLE; + s->sbm_maccfg = s->sbm_base + R_MAC_CFG; + s->sbm_fifocfg = s->sbm_base + R_MAC_THRSH_CFG; + s->sbm_framecfg = s->sbm_base + R_MAC_FRAMECFG; + s->sbm_rxfilter = s->sbm_base + R_MAC_ADFILTER_CFG; + s->sbm_isr = s->sbm_base + R_MAC_STATUS; + s->sbm_imr = s->sbm_base + R_MAC_INT_MASK; + s->sbm_mdio = s->sbm_base + R_MAC_MDIO; + + s->sbm_phys[0] = 1; + s->sbm_phys[1] = 0; + + s->sbm_phy_oldbmsr = 0; + s->sbm_phy_oldanlpar = 0; + s->sbm_phy_oldk1stsr = 0; + s->sbm_phy_oldlinkstat = 0; + + /* + * Initialize the DMA channels. Right now, only one per MAC is used + * Note: Only do this _once_, as it allocates memory from the kernel! + */ + + sbdma_initctx(&(s->sbm_txdma),s,0,DMA_TX,SBMAC_MAX_TXDESCR); + sbdma_initctx(&(s->sbm_rxdma),s,0,DMA_RX,SBMAC_MAX_RXDESCR); + + /* + * initial state is OFF + */ + + s->sbm_state = sbmac_state_off; + + /* + * Initial speed is (XXX TEMP) 10MBit/s HDX no FC + */ + + s->sbm_speed = sbmac_speed_10; + s->sbm_duplex = sbmac_duplex_half; + s->sbm_fc = sbmac_fc_disabled; + + return 0; +} + + +static void sbdma_uninitctx(struct sbmacdma_s *d) +{ + if (d->sbdma_dscrtable) { + kfree(d->sbdma_dscrtable); + d->sbdma_dscrtable = NULL; + } + + if (d->sbdma_ctxtable) { + kfree(d->sbdma_ctxtable); + d->sbdma_ctxtable = NULL; + } +} + + +static void sbmac_uninitctx(struct sbmac_softc *sc) +{ + sbdma_uninitctx(&(sc->sbm_txdma)); + sbdma_uninitctx(&(sc->sbm_rxdma)); +} + + +/********************************************************************** + * SBMAC_CHANNEL_START(s) + * + * Start packet processing on this MAC. + * + * Input parameters: + * s - sbmac structure + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbmac_channel_start(struct sbmac_softc *s) +{ + uint64_t reg; + sbmac_port_t port; + uint64_t cfg,fifo,framecfg; + int idx, th_value; + + /* + * Don't do this if running + */ + + if (s->sbm_state == sbmac_state_on) + return; + + /* + * Bring the controller out of reset, but leave it off. + */ + + SBMAC_WRITECSR(s->sbm_macenable,0); + + /* + * Ignore all received packets + */ + + SBMAC_WRITECSR(s->sbm_rxfilter,0); + + /* + * Calculate values for various control registers. + */ + + cfg = M_MAC_RETRY_EN | + M_MAC_TX_HOLD_SOP_EN | + V_MAC_TX_PAUSE_CNT_16K | + M_MAC_AP_STAT_EN | + M_MAC_FAST_SYNC | + M_MAC_SS_EN | + 0; + + /* + * Be sure that RD_THRSH+WR_THRSH <= 32 for pass1 pars + * and make sure that RD_THRSH + WR_THRSH <=128 for pass2 and above + * Use a larger RD_THRSH for gigabit + */ + if (periph_rev >= 2) + th_value = 64; + else + th_value = 28; + + fifo = V_MAC_TX_WR_THRSH(4) | /* Must be '4' or '8' */ + ((s->sbm_speed == sbmac_speed_1000) + ? V_MAC_TX_RD_THRSH(th_value) : V_MAC_TX_RD_THRSH(4)) | + V_MAC_TX_RL_THRSH(4) | + V_MAC_RX_PL_THRSH(4) | + V_MAC_RX_RD_THRSH(4) | /* Must be '4' */ + V_MAC_RX_PL_THRSH(4) | + V_MAC_RX_RL_THRSH(8) | + 0; + + framecfg = V_MAC_MIN_FRAMESZ_DEFAULT | + V_MAC_MAX_FRAMESZ_DEFAULT | + V_MAC_BACKOFF_SEL(1); + + /* + * Clear out the hash address map + */ + + port = s->sbm_base + R_MAC_HASH_BASE; + for (idx = 0; idx < MAC_HASH_COUNT; idx++) { + SBMAC_WRITECSR(port,0); + port += sizeof(uint64_t); + } + + /* + * Clear out the exact-match table + */ + + port = s->sbm_base + R_MAC_ADDR_BASE; + for (idx = 0; idx < MAC_ADDR_COUNT; idx++) { + SBMAC_WRITECSR(port,0); + port += sizeof(uint64_t); + } + + /* + * Clear out the DMA Channel mapping table registers + */ + + port = s->sbm_base + R_MAC_CHUP0_BASE; + for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) { + SBMAC_WRITECSR(port,0); + port += sizeof(uint64_t); + } + + + port = s->sbm_base + R_MAC_CHLO0_BASE; + for (idx = 0; idx < MAC_CHMAP_COUNT; idx++) { + SBMAC_WRITECSR(port,0); + port += sizeof(uint64_t); + } + + /* + * Program the hardware address. It goes into the hardware-address + * register as well as the first filter register. + */ + + reg = sbmac_addr2reg(s->sbm_hwaddr); + + port = s->sbm_base + R_MAC_ADDR_BASE; + SBMAC_WRITECSR(port,reg); + port = s->sbm_base + R_MAC_ETHERNET_ADDR; + +#ifdef CONFIG_SB1_PASS_1_WORKAROUNDS + /* + * Pass1 SOCs do not receive packets addressed to the + * destination address in the R_MAC_ETHERNET_ADDR register. + * Set the value to zero. + */ + SBMAC_WRITECSR(port,0); +#else + SBMAC_WRITECSR(port,reg); +#endif + + /* + * Set the receive filter for no packets, and write values + * to the various config registers + */ + + SBMAC_WRITECSR(s->sbm_rxfilter,0); + SBMAC_WRITECSR(s->sbm_imr,0); + SBMAC_WRITECSR(s->sbm_framecfg,framecfg); + SBMAC_WRITECSR(s->sbm_fifocfg,fifo); + SBMAC_WRITECSR(s->sbm_maccfg,cfg); + + /* + * Initialize DMA channels (rings should be ok now) + */ + + sbdma_channel_start(&(s->sbm_rxdma), DMA_RX); + sbdma_channel_start(&(s->sbm_txdma), DMA_TX); + + /* + * Configure the speed, duplex, and flow control + */ + + sbmac_set_speed(s,s->sbm_speed); + sbmac_set_duplex(s,s->sbm_duplex,s->sbm_fc); + + /* + * Fill the receive ring + */ + + sbdma_fillring(&(s->sbm_rxdma)); + + /* + * Turn on the rest of the bits in the enable register + */ + + SBMAC_WRITECSR(s->sbm_macenable, + M_MAC_RXDMA_EN0 | + M_MAC_TXDMA_EN0 | + M_MAC_RX_ENABLE | + M_MAC_TX_ENABLE); + + + + +#ifdef CONFIG_SBMAC_COALESCE + /* + * Accept any TX interrupt and EOP count/timer RX interrupts on ch 0 + */ + SBMAC_WRITECSR(s->sbm_imr, + ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_TX_CH0) | + ((M_MAC_INT_EOP_COUNT | M_MAC_INT_EOP_TIMER) << S_MAC_RX_CH0)); +#else + /* + * Accept any kind of interrupt on TX and RX DMA channel 0 + */ + SBMAC_WRITECSR(s->sbm_imr, + (M_MAC_INT_CHANNEL << S_MAC_TX_CH0) | + (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)); +#endif + + /* + * Enable receiving unicasts and broadcasts + */ + + SBMAC_WRITECSR(s->sbm_rxfilter,M_MAC_UCAST_EN | M_MAC_BCAST_EN); + + /* + * we're running now. + */ + + s->sbm_state = sbmac_state_on; + + /* + * Program multicast addresses + */ + + sbmac_setmulti(s); + + /* + * If channel was in promiscuous mode before, turn that on + */ + + if (s->sbm_devflags & IFF_PROMISC) { + sbmac_promiscuous_mode(s,1); + } + +} + + +/********************************************************************** + * SBMAC_CHANNEL_STOP(s) + * + * Stop packet processing on this MAC. + * + * Input parameters: + * s - sbmac structure + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbmac_channel_stop(struct sbmac_softc *s) +{ + /* don't do this if already stopped */ + + if (s->sbm_state == sbmac_state_off) + return; + + /* don't accept any packets, disable all interrupts */ + + SBMAC_WRITECSR(s->sbm_rxfilter,0); + SBMAC_WRITECSR(s->sbm_imr,0); + + /* Turn off ticker */ + + /* XXX */ + + /* turn off receiver and transmitter */ + + SBMAC_WRITECSR(s->sbm_macenable,0); + + /* We're stopped now. */ + + s->sbm_state = sbmac_state_off; + + /* + * Stop DMA channels (rings should be ok now) + */ + + sbdma_channel_stop(&(s->sbm_rxdma)); + sbdma_channel_stop(&(s->sbm_txdma)); + + /* Empty the receive and transmit rings */ + + sbdma_emptyring(&(s->sbm_rxdma)); + sbdma_emptyring(&(s->sbm_txdma)); + +} + +/********************************************************************** + * SBMAC_SET_CHANNEL_STATE(state) + * + * Set the channel's state ON or OFF + * + * Input parameters: + * state - new state + * + * Return value: + * old state + ********************************************************************* */ +static sbmac_state_t sbmac_set_channel_state(struct sbmac_softc *sc, + sbmac_state_t state) +{ + sbmac_state_t oldstate = sc->sbm_state; + + /* + * If same as previous state, return + */ + + if (state == oldstate) { + return oldstate; + } + + /* + * If new state is ON, turn channel on + */ + + if (state == sbmac_state_on) { + sbmac_channel_start(sc); + } + else { + sbmac_channel_stop(sc); + } + + /* + * Return previous state + */ + + return oldstate; +} + + +/********************************************************************** + * SBMAC_PROMISCUOUS_MODE(sc,onoff) + * + * Turn on or off promiscuous mode + * + * Input parameters: + * sc - softc + * onoff - 1 to turn on, 0 to turn off + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbmac_promiscuous_mode(struct sbmac_softc *sc,int onoff) +{ + uint64_t reg; + + if (sc->sbm_state != sbmac_state_on) + return; + + if (onoff) { + reg = SBMAC_READCSR(sc->sbm_rxfilter); + reg |= M_MAC_ALLPKT_EN; + SBMAC_WRITECSR(sc->sbm_rxfilter,reg); + } + else { + reg = SBMAC_READCSR(sc->sbm_rxfilter); + reg &= ~M_MAC_ALLPKT_EN; + SBMAC_WRITECSR(sc->sbm_rxfilter,reg); + } +} + +/********************************************************************** + * SBMAC_SETIPHDR_OFFSET(sc,onoff) + * + * Set the iphdr offset as 15 assuming ethernet encapsulation + * + * Input parameters: + * sc - softc + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbmac_set_iphdr_offset(struct sbmac_softc *sc) +{ + uint64_t reg; + + /* Hard code the off set to 15 for now */ + reg = SBMAC_READCSR(sc->sbm_rxfilter); + reg &= ~M_MAC_IPHDR_OFFSET | V_MAC_IPHDR_OFFSET(15); + SBMAC_WRITECSR(sc->sbm_rxfilter,reg); + + /* read system identification to determine revision */ + if (periph_rev >= 2) { + sc->rx_hw_checksum = ENABLE; + } else { + sc->rx_hw_checksum = DISABLE; + } +} + + +/********************************************************************** + * SBMAC_ADDR2REG(ptr) + * + * Convert six bytes into the 64-bit register value that + * we typically write into the SBMAC's address/mcast registers + * + * Input parameters: + * ptr - pointer to 6 bytes + * + * Return value: + * register value + ********************************************************************* */ + +static uint64_t sbmac_addr2reg(unsigned char *ptr) +{ + uint64_t reg = 0; + + ptr += 6; + + reg |= (uint64_t) *(--ptr); + reg <<= 8; + reg |= (uint64_t) *(--ptr); + reg <<= 8; + reg |= (uint64_t) *(--ptr); + reg <<= 8; + reg |= (uint64_t) *(--ptr); + reg <<= 8; + reg |= (uint64_t) *(--ptr); + reg <<= 8; + reg |= (uint64_t) *(--ptr); + + return reg; +} + + +/********************************************************************** + * SBMAC_SET_SPEED(s,speed) + * + * Configure LAN speed for the specified MAC. + * Warning: must be called when MAC is off! + * + * Input parameters: + * s - sbmac structure + * speed - speed to set MAC to (see sbmac_speed_t enum) + * + * Return value: + * 1 if successful + * 0 indicates invalid parameters + ********************************************************************* */ + +static int sbmac_set_speed(struct sbmac_softc *s,sbmac_speed_t speed) +{ + uint64_t cfg; + uint64_t framecfg; + + /* + * Save new current values + */ + + s->sbm_speed = speed; + + if (s->sbm_state == sbmac_state_on) + return 0; /* save for next restart */ + + /* + * Read current register values + */ + + cfg = SBMAC_READCSR(s->sbm_maccfg); + framecfg = SBMAC_READCSR(s->sbm_framecfg); + + /* + * Mask out the stuff we want to change + */ + + cfg &= ~(M_MAC_BURST_EN | M_MAC_SPEED_SEL); + framecfg &= ~(M_MAC_IFG_RX | M_MAC_IFG_TX | M_MAC_IFG_THRSH | + M_MAC_SLOT_SIZE); + + /* + * Now add in the new bits + */ + + switch (speed) { + case sbmac_speed_10: + framecfg |= V_MAC_IFG_RX_10 | + V_MAC_IFG_TX_10 | + K_MAC_IFG_THRSH_10 | + V_MAC_SLOT_SIZE_10; + cfg |= V_MAC_SPEED_SEL_10MBPS; + break; + + case sbmac_speed_100: + framecfg |= V_MAC_IFG_RX_100 | + V_MAC_IFG_TX_100 | + V_MAC_IFG_THRSH_100 | + V_MAC_SLOT_SIZE_100; + cfg |= V_MAC_SPEED_SEL_100MBPS ; + break; + + case sbmac_speed_1000: + framecfg |= V_MAC_IFG_RX_1000 | + V_MAC_IFG_TX_1000 | + V_MAC_IFG_THRSH_1000 | + V_MAC_SLOT_SIZE_1000; + cfg |= V_MAC_SPEED_SEL_1000MBPS | M_MAC_BURST_EN; + break; + + case sbmac_speed_auto: /* XXX not implemented */ + /* fall through */ + default: + return 0; + } + + /* + * Send the bits back to the hardware + */ + + SBMAC_WRITECSR(s->sbm_framecfg,framecfg); + SBMAC_WRITECSR(s->sbm_maccfg,cfg); + + return 1; +} + +/********************************************************************** + * SBMAC_SET_DUPLEX(s,duplex,fc) + * + * Set Ethernet duplex and flow control options for this MAC + * Warning: must be called when MAC is off! + * + * Input parameters: + * s - sbmac structure + * duplex - duplex setting (see sbmac_duplex_t) + * fc - flow control setting (see sbmac_fc_t) + * + * Return value: + * 1 if ok + * 0 if an invalid parameter combination was specified + ********************************************************************* */ + +static int sbmac_set_duplex(struct sbmac_softc *s,sbmac_duplex_t duplex,sbmac_fc_t fc) +{ + uint64_t cfg; + + /* + * Save new current values + */ + + s->sbm_duplex = duplex; + s->sbm_fc = fc; + + if (s->sbm_state == sbmac_state_on) + return 0; /* save for next restart */ + + /* + * Read current register values + */ + + cfg = SBMAC_READCSR(s->sbm_maccfg); + + /* + * Mask off the stuff we're about to change + */ + + cfg &= ~(M_MAC_FC_SEL | M_MAC_FC_CMD | M_MAC_HDX_EN); + + + switch (duplex) { + case sbmac_duplex_half: + switch (fc) { + case sbmac_fc_disabled: + cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_DISABLED; + break; + + case sbmac_fc_collision: + cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENABLED; + break; + + case sbmac_fc_carrier: + cfg |= M_MAC_HDX_EN | V_MAC_FC_CMD_ENAB_FALSECARR; + break; + + case sbmac_fc_auto: /* XXX not implemented */ + /* fall through */ + case sbmac_fc_frame: /* not valid in half duplex */ + default: /* invalid selection */ + return 0; + } + break; + + case sbmac_duplex_full: + switch (fc) { + case sbmac_fc_disabled: + cfg |= V_MAC_FC_CMD_DISABLED; + break; + + case sbmac_fc_frame: + cfg |= V_MAC_FC_CMD_ENABLED; + break; + + case sbmac_fc_collision: /* not valid in full duplex */ + case sbmac_fc_carrier: /* not valid in full duplex */ + case sbmac_fc_auto: /* XXX not implemented */ + /* fall through */ + default: + return 0; + } + break; + case sbmac_duplex_auto: + /* XXX not implemented */ + break; + } + + /* + * Send the bits back to the hardware + */ + + SBMAC_WRITECSR(s->sbm_maccfg,cfg); + + return 1; +} + + + + +/********************************************************************** + * SBMAC_INTR() + * + * Interrupt handler for MAC interrupts + * + * Input parameters: + * MAC structure + * + * Return value: + * nothing + ********************************************************************* */ +static irqreturn_t sbmac_intr(int irq,void *dev_instance,struct pt_regs *rgs) +{ + struct net_device *dev = (struct net_device *) dev_instance; + struct sbmac_softc *sc = netdev_priv(dev); + uint64_t isr; + int handled = 0; + + for (;;) { + + /* + * Read the ISR (this clears the bits in the real + * register, except for counter addr) + */ + + isr = SBMAC_READCSR(sc->sbm_isr) & ~M_MAC_COUNTER_ADDR; + + if (isr == 0) + break; + + handled = 1; + + /* + * Transmits on channel 0 + */ + + if (isr & (M_MAC_INT_CHANNEL << S_MAC_TX_CH0)) { + sbdma_tx_process(sc,&(sc->sbm_txdma)); + } + + /* + * Receives on channel 0 + */ + + /* + * It's important to test all the bits (or at least the + * EOP_SEEN bit) when deciding to do the RX process + * particularly when coalescing, to make sure we + * take care of the following: + * + * If you have some packets waiting (have been received + * but no interrupt) and get a TX interrupt before + * the RX timer or counter expires, reading the ISR + * above will clear the timer and counter, and you + * won't get another interrupt until a packet shows + * up to start the timer again. Testing + * EOP_SEEN here takes care of this case. + * (EOP_SEEN is part of M_MAC_INT_CHANNEL << S_MAC_RX_CH0) + */ + + + if (isr & (M_MAC_INT_CHANNEL << S_MAC_RX_CH0)) { + sbdma_rx_process(sc,&(sc->sbm_rxdma)); + } + } + return IRQ_RETVAL(handled); +} + + +/********************************************************************** + * SBMAC_START_TX(skb,dev) + * + * Start output on the specified interface. Basically, we + * queue as many buffers as we can until the ring fills up, or + * we run off the end of the queue, whichever comes first. + * + * Input parameters: + * + * + * Return value: + * nothing + ********************************************************************* */ +static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev) +{ + struct sbmac_softc *sc = netdev_priv(dev); + + /* lock eth irq */ + spin_lock_irq (&sc->sbm_lock); + + /* + * Put the buffer on the transmit ring. If we + * don't have room, stop the queue. + */ + + if (sbdma_add_txbuffer(&(sc->sbm_txdma),skb)) { + /* XXX save skb that we could not send */ + netif_stop_queue(dev); + spin_unlock_irq(&sc->sbm_lock); + + return 1; + } + + dev->trans_start = jiffies; + + spin_unlock_irq (&sc->sbm_lock); + + return 0; +} + +/********************************************************************** + * SBMAC_SETMULTI(sc) + * + * Reprogram the multicast table into the hardware, given + * the list of multicasts associated with the interface + * structure. + * + * Input parameters: + * sc - softc + * + * Return value: + * nothing + ********************************************************************* */ + +static void sbmac_setmulti(struct sbmac_softc *sc) +{ + uint64_t reg; + sbmac_port_t port; + int idx; + struct dev_mc_list *mclist; + struct net_device *dev = sc->sbm_dev; + + /* + * Clear out entire multicast table. We do this by nuking + * the entire hash table and all the direct matches except + * the first one, which is used for our station address + */ + + for (idx = 1; idx < MAC_ADDR_COUNT; idx++) { + port = sc->sbm_base + R_MAC_ADDR_BASE+(idx*sizeof(uint64_t)); + SBMAC_WRITECSR(port,0); + } + + for (idx = 0; idx < MAC_HASH_COUNT; idx++) { + port = sc->sbm_base + R_MAC_HASH_BASE+(idx*sizeof(uint64_t)); + SBMAC_WRITECSR(port,0); + } + + /* + * Clear the filter to say we don't want any multicasts. + */ + + reg = SBMAC_READCSR(sc->sbm_rxfilter); + reg &= ~(M_MAC_MCAST_INV | M_MAC_MCAST_EN); + SBMAC_WRITECSR(sc->sbm_rxfilter,reg); + + if (dev->flags & IFF_ALLMULTI) { + /* + * Enable ALL multicasts. Do this by inverting the + * multicast enable bit. + */ + reg = SBMAC_READCSR(sc->sbm_rxfilter); + reg |= (M_MAC_MCAST_INV | M_MAC_MCAST_EN); + SBMAC_WRITECSR(sc->sbm_rxfilter,reg); + return; + } + + + /* + * Progam new multicast entries. For now, only use the + * perfect filter. In the future we'll need to use the + * hash filter if the perfect filter overflows + */ + + /* XXX only using perfect filter for now, need to use hash + * XXX if the table overflows */ + + idx = 1; /* skip station address */ + mclist = dev->mc_list; + while (mclist && (idx < MAC_ADDR_COUNT)) { + reg = sbmac_addr2reg(mclist->dmi_addr); + port = sc->sbm_base + R_MAC_ADDR_BASE+(idx * sizeof(uint64_t)); + SBMAC_WRITECSR(port,reg); + idx++; + mclist = mclist->next; + } + + /* + * Enable the "accept multicast bits" if we programmed at least one + * multicast. + */ + + if (idx > 1) { + reg = SBMAC_READCSR(sc->sbm_rxfilter); + reg |= M_MAC_MCAST_EN; + SBMAC_WRITECSR(sc->sbm_rxfilter,reg); + } +} + + + +#if defined(SBMAC_ETH0_HWADDR) || defined(SBMAC_ETH1_HWADDR) || defined(SBMAC_ETH2_HWADDR) +/********************************************************************** + * SBMAC_PARSE_XDIGIT(str) + * + * Parse a hex digit, returning its value + * + * Input parameters: + * str - character + * + * Return value: + * hex value, or -1 if invalid + ********************************************************************* */ + +static int sbmac_parse_xdigit(char str) +{ + int digit; + + if ((str >= '0') && (str <= '9')) + digit = str - '0'; + else if ((str >= 'a') && (str <= 'f')) + digit = str - 'a' + 10; + else if ((str >= 'A') && (str <= 'F')) + digit = str - 'A' + 10; + else + return -1; + + return digit; +} + +/********************************************************************** + * SBMAC_PARSE_HWADDR(str,hwaddr) + * + * Convert a string in the form xx:xx:xx:xx:xx:xx into a 6-byte + * Ethernet address. + * + * Input parameters: + * str - string + * hwaddr - pointer to hardware address + * + * Return value: + * 0 if ok, else -1 + ********************************************************************* */ + +static int sbmac_parse_hwaddr(char *str, unsigned char *hwaddr) +{ + int digit1,digit2; + int idx = 6; + + while (*str && (idx > 0)) { + digit1 = sbmac_parse_xdigit(*str); + if (digit1 < 0) + return -1; + str++; + if (!*str) + return -1; + + if ((*str == ':') || (*str == '-')) { + digit2 = digit1; + digit1 = 0; + } + else { + digit2 = sbmac_parse_xdigit(*str); + if (digit2 < 0) + return -1; + str++; + } + + *hwaddr++ = (digit1 << 4) | digit2; + idx--; + + if (*str == '-') + str++; + if (*str == ':') + str++; + } + return 0; +} +#endif + +static int sb1250_change_mtu(struct net_device *_dev, int new_mtu) +{ + if (new_mtu > ENET_PACKET_SIZE) + return -EINVAL; + _dev->mtu = new_mtu; + printk(KERN_INFO "changing the mtu to %d\n", new_mtu); + return 0; +} + +/********************************************************************** + * SBMAC_INIT(dev) + * + * Attach routine - init hardware and hook ourselves into linux + * + * Input parameters: + * dev - net_device structure + * + * Return value: + * status + ********************************************************************* */ + +static int sbmac_init(struct net_device *dev, int idx) +{ + struct sbmac_softc *sc; + unsigned char *eaddr; + uint64_t ea_reg; + int i; + int err; + + sc = netdev_priv(dev); + + /* Determine controller base address */ + + sc->sbm_base = IOADDR(dev->base_addr); + sc->sbm_dev = dev; + sc->sbe_idx = idx; + + eaddr = sc->sbm_hwaddr; + + /* + * Read the ethernet address. The firwmare left this programmed + * for us in the ethernet address register for each mac. + */ + + ea_reg = SBMAC_READCSR(sc->sbm_base + R_MAC_ETHERNET_ADDR); + SBMAC_WRITECSR(sc->sbm_base + R_MAC_ETHERNET_ADDR, 0); + for (i = 0; i < 6; i++) { + eaddr[i] = (uint8_t) (ea_reg & 0xFF); + ea_reg >>= 8; + } + + for (i = 0; i < 6; i++) { + dev->dev_addr[i] = eaddr[i]; + } + + + /* + * Init packet size + */ + + sc->sbm_buffersize = ENET_PACKET_SIZE + SMP_CACHE_BYTES * 2 + ETHER_ALIGN; + + /* + * Initialize context (get pointers to registers and stuff), then + * allocate the memory for the descriptor tables. + */ + + sbmac_initctx(sc); + + /* + * Set up Linux device callins + */ + + spin_lock_init(&(sc->sbm_lock)); + + dev->open = sbmac_open; + dev->hard_start_xmit = sbmac_start_tx; + dev->stop = sbmac_close; + dev->get_stats = sbmac_get_stats; + dev->set_multicast_list = sbmac_set_rx_mode; + dev->do_ioctl = sbmac_mii_ioctl; + dev->tx_timeout = sbmac_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; + + dev->change_mtu = sb1250_change_mtu; + + /* This is needed for PASS2 for Rx H/W checksum feature */ + sbmac_set_iphdr_offset(sc); + + err = register_netdev(dev); + if (err) + goto out_uninit; + + if (periph_rev >= 2) { + printk(KERN_INFO "%s: enabling TCP rcv checksum\n", + sc->sbm_dev->name); + } + + /* + * Display Ethernet address (this is called during the config + * process so we need to finish off the config message that + * was being displayed) + */ + printk(KERN_INFO + "%s: SiByte Ethernet at 0x%08lX, address: %02X:%02X:%02X:%02X:%02X:%02X\n", + dev->name, dev->base_addr, + eaddr[0],eaddr[1],eaddr[2],eaddr[3],eaddr[4],eaddr[5]); + + + return 0; + +out_uninit: + sbmac_uninitctx(sc); + + return err; +} + + +static int sbmac_open(struct net_device *dev) +{ + struct sbmac_softc *sc = netdev_priv(dev); + + if (debug > 1) { + printk(KERN_DEBUG "%s: sbmac_open() irq %d.\n", dev->name, dev->irq); + } + + /* + * map/route interrupt (clear status first, in case something + * weird is pending; we haven't initialized the mac registers + * yet) + */ + + SBMAC_READCSR(sc->sbm_isr); + if (request_irq(dev->irq, &sbmac_intr, SA_SHIRQ, dev->name, dev)) + return -EBUSY; + + /* + * Configure default speed + */ + + sbmac_mii_poll(sc,noisy_mii); + + /* + * Turn on the channel + */ + + sbmac_set_channel_state(sc,sbmac_state_on); + + /* + * XXX Station address is in dev->dev_addr + */ + + if (dev->if_port == 0) + dev->if_port = 0; + + netif_start_queue(dev); + + sbmac_set_rx_mode(dev); + + /* Set the timer to check for link beat. */ + init_timer(&sc->sbm_timer); + sc->sbm_timer.expires = jiffies + 2 * HZ/100; + sc->sbm_timer.data = (unsigned long)dev; + sc->sbm_timer.function = &sbmac_timer; + add_timer(&sc->sbm_timer); + + return 0; +} + + + +static int sbmac_mii_poll(struct sbmac_softc *s,int noisy) +{ + int bmsr,bmcr,k1stsr,anlpar; + int chg; + char buffer[100]; + char *p = buffer; + + /* Read the mode status and mode control registers. */ + bmsr = sbmac_mii_read(s,s->sbm_phys[0],MII_BMSR); + bmcr = sbmac_mii_read(s,s->sbm_phys[0],MII_BMCR); + + /* get the link partner status */ + anlpar = sbmac_mii_read(s,s->sbm_phys[0],MII_ANLPAR); + + /* if supported, read the 1000baseT register */ + if (bmsr & BMSR_1000BT_XSR) { + k1stsr = sbmac_mii_read(s,s->sbm_phys[0],MII_K1STSR); + } + else { + k1stsr = 0; + } + + chg = 0; + + if ((bmsr & BMSR_LINKSTAT) == 0) { + /* + * If link status is down, clear out old info so that when + * it comes back up it will force us to reconfigure speed + */ + s->sbm_phy_oldbmsr = 0; + s->sbm_phy_oldanlpar = 0; + s->sbm_phy_oldk1stsr = 0; + return 0; + } + + if ((s->sbm_phy_oldbmsr != bmsr) || + (s->sbm_phy_oldanlpar != anlpar) || + (s->sbm_phy_oldk1stsr != k1stsr)) { + if (debug > 1) { + printk(KERN_DEBUG "%s: bmsr:%x/%x anlpar:%x/%x k1stsr:%x/%x\n", + s->sbm_dev->name, + s->sbm_phy_oldbmsr,bmsr, + s->sbm_phy_oldanlpar,anlpar, + s->sbm_phy_oldk1stsr,k1stsr); + } + s->sbm_phy_oldbmsr = bmsr; + s->sbm_phy_oldanlpar = anlpar; + s->sbm_phy_oldk1stsr = k1stsr; + chg = 1; + } + + if (chg == 0) + return 0; + + p += sprintf(p,"Link speed: "); + + if (k1stsr & K1STSR_LP1KFD) { + s->sbm_speed = sbmac_speed_1000; + s->sbm_duplex = sbmac_duplex_full; + s->sbm_fc = sbmac_fc_frame; + p += sprintf(p,"1000BaseT FDX"); + } + else if (k1stsr & K1STSR_LP1KHD) { + s->sbm_speed = sbmac_speed_1000; + s->sbm_duplex = sbmac_duplex_half; + s->sbm_fc = sbmac_fc_disabled; + p += sprintf(p,"1000BaseT HDX"); + } + else if (anlpar & ANLPAR_TXFD) { + s->sbm_speed = sbmac_speed_100; + s->sbm_duplex = sbmac_duplex_full; + s->sbm_fc = (anlpar & ANLPAR_PAUSE) ? sbmac_fc_frame : sbmac_fc_disabled; + p += sprintf(p,"100BaseT FDX"); + } + else if (anlpar & ANLPAR_TXHD) { + s->sbm_speed = sbmac_speed_100; + s->sbm_duplex = sbmac_duplex_half; + s->sbm_fc = sbmac_fc_disabled; + p += sprintf(p,"100BaseT HDX"); + } + else if (anlpar & ANLPAR_10FD) { + s->sbm_speed = sbmac_speed_10; + s->sbm_duplex = sbmac_duplex_full; + s->sbm_fc = sbmac_fc_frame; + p += sprintf(p,"10BaseT FDX"); + } + else if (anlpar & ANLPAR_10HD) { + s->sbm_speed = sbmac_speed_10; + s->sbm_duplex = sbmac_duplex_half; + s->sbm_fc = sbmac_fc_collision; + p += sprintf(p,"10BaseT HDX"); + } + else { + p += sprintf(p,"Unknown"); + } + + if (noisy) { + printk(KERN_INFO "%s: %s\n",s->sbm_dev->name,buffer); + } + + return 1; +} + + +static void sbmac_timer(unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + struct sbmac_softc *sc = netdev_priv(dev); + int next_tick = HZ; + int mii_status; + + spin_lock_irq (&sc->sbm_lock); + + /* make IFF_RUNNING follow the MII status bit "Link established" */ + mii_status = sbmac_mii_read(sc, sc->sbm_phys[0], MII_BMSR); + + if ( (mii_status & BMSR_LINKSTAT) != (sc->sbm_phy_oldlinkstat) ) { + sc->sbm_phy_oldlinkstat = mii_status & BMSR_LINKSTAT; + if (mii_status & BMSR_LINKSTAT) { + netif_carrier_on(dev); + } + else { + netif_carrier_off(dev); + } + } + + /* + * Poll the PHY to see what speed we should be running at + */ + + if (sbmac_mii_poll(sc,noisy_mii)) { + if (sc->sbm_state != sbmac_state_off) { + /* + * something changed, restart the channel + */ + if (debug > 1) { + printk("%s: restarting channel because speed changed\n", + sc->sbm_dev->name); + } + sbmac_channel_stop(sc); + sbmac_channel_start(sc); + } + } + + spin_unlock_irq (&sc->sbm_lock); + + sc->sbm_timer.expires = jiffies + next_tick; + add_timer(&sc->sbm_timer); +} + + +static void sbmac_tx_timeout (struct net_device *dev) +{ + struct sbmac_softc *sc = netdev_priv(dev); + + spin_lock_irq (&sc->sbm_lock); + + + dev->trans_start = jiffies; + sc->sbm_stats.tx_errors++; + + spin_unlock_irq (&sc->sbm_lock); + + printk (KERN_WARNING "%s: Transmit timed out\n",dev->name); +} + + + + +static struct net_device_stats *sbmac_get_stats(struct net_device *dev) +{ + struct sbmac_softc *sc = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&sc->sbm_lock, flags); + + /* XXX update other stats here */ + + spin_unlock_irqrestore(&sc->sbm_lock, flags); + + return &sc->sbm_stats; +} + + + +static void sbmac_set_rx_mode(struct net_device *dev) +{ + unsigned long flags; + int msg_flag = 0; + struct sbmac_softc *sc = netdev_priv(dev); + + spin_lock_irqsave(&sc->sbm_lock, flags); + if ((dev->flags ^ sc->sbm_devflags) & IFF_PROMISC) { + /* + * Promiscuous changed. + */ + + if (dev->flags & IFF_PROMISC) { + /* Unconditionally log net taps. */ + msg_flag = 1; + sbmac_promiscuous_mode(sc,1); + } + else { + msg_flag = 2; + sbmac_promiscuous_mode(sc,0); + } + } + spin_unlock_irqrestore(&sc->sbm_lock, flags); + + if (msg_flag) { + printk(KERN_NOTICE "%s: Promiscuous mode %sabled.\n", + dev->name,(msg_flag==1)?"en":"dis"); + } + + /* + * Program the multicasts. Do this every time. + */ + + sbmac_setmulti(sc); + +} + +static int sbmac_mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct sbmac_softc *sc = netdev_priv(dev); + u16 *data = (u16 *)&rq->ifr_ifru; + unsigned long flags; + int retval; + + spin_lock_irqsave(&sc->sbm_lock, flags); + retval = 0; + + switch(cmd) { + case SIOCDEVPRIVATE: /* Get the address of the PHY in use. */ + data[0] = sc->sbm_phys[0] & 0x1f; + /* Fall Through */ + case SIOCDEVPRIVATE+1: /* Read the specified MII register. */ + data[3] = sbmac_mii_read(sc, data[0] & 0x1f, data[1] & 0x1f); + break; + case SIOCDEVPRIVATE+2: /* Write the specified MII register */ + if (!capable(CAP_NET_ADMIN)) { + retval = -EPERM; + break; + } + if (debug > 1) { + printk(KERN_DEBUG "%s: sbmac_mii_ioctl: write %02X %02X %02X\n",dev->name, + data[0],data[1],data[2]); + } + sbmac_mii_write(sc, data[0] & 0x1f, data[1] & 0x1f, data[2]); + break; + default: + retval = -EOPNOTSUPP; + } + + spin_unlock_irqrestore(&sc->sbm_lock, flags); + return retval; +} + +static int sbmac_close(struct net_device *dev) +{ + struct sbmac_softc *sc = netdev_priv(dev); + unsigned long flags; + int irq; + + sbmac_set_channel_state(sc,sbmac_state_off); + + del_timer_sync(&sc->sbm_timer); + + spin_lock_irqsave(&sc->sbm_lock, flags); + + netif_stop_queue(dev); + + if (debug > 1) { + printk(KERN_DEBUG "%s: Shutting down ethercard\n",dev->name); + } + + spin_unlock_irqrestore(&sc->sbm_lock, flags); + + irq = dev->irq; + synchronize_irq(irq); + free_irq(irq, dev); + + sbdma_emptyring(&(sc->sbm_txdma)); + sbdma_emptyring(&(sc->sbm_rxdma)); + + return 0; +} + + + +#if defined(SBMAC_ETH0_HWADDR) || defined(SBMAC_ETH1_HWADDR) || defined(SBMAC_ETH2_HWADDR) +static void +sbmac_setup_hwaddr(int chan,char *addr) +{ + uint8_t eaddr[6]; + uint64_t val; + sbmac_port_t port; + + port = A_MAC_CHANNEL_BASE(chan); + sbmac_parse_hwaddr(addr,eaddr); + val = sbmac_addr2reg(eaddr); + SBMAC_WRITECSR(IOADDR(port+R_MAC_ETHERNET_ADDR),val); + val = SBMAC_READCSR(IOADDR(port+R_MAC_ETHERNET_ADDR)); +} +#endif + +static struct net_device *dev_sbmac[MAX_UNITS]; + +static int __init +sbmac_init_module(void) +{ + int idx; + struct net_device *dev; + sbmac_port_t port; + int chip_max_units; + + /* + * For bringup when not using the firmware, we can pre-fill + * the MAC addresses using the environment variables + * specified in this file (or maybe from the config file?) + */ +#ifdef SBMAC_ETH0_HWADDR + sbmac_setup_hwaddr(0,SBMAC_ETH0_HWADDR); +#endif +#ifdef SBMAC_ETH1_HWADDR + sbmac_setup_hwaddr(1,SBMAC_ETH1_HWADDR); +#endif +#ifdef SBMAC_ETH2_HWADDR + sbmac_setup_hwaddr(2,SBMAC_ETH2_HWADDR); +#endif + + /* + * Walk through the Ethernet controllers and find + * those who have their MAC addresses set. + */ + switch (soc_type) { + case K_SYS_SOC_TYPE_BCM1250: + case K_SYS_SOC_TYPE_BCM1250_ALT: + chip_max_units = 3; + break; + case K_SYS_SOC_TYPE_BCM1120: + case K_SYS_SOC_TYPE_BCM1125: + case K_SYS_SOC_TYPE_BCM1125H: + case K_SYS_SOC_TYPE_BCM1250_ALT2: /* Hybrid */ + chip_max_units = 2; + break; + default: + chip_max_units = 0; + break; + } + if (chip_max_units > MAX_UNITS) + chip_max_units = MAX_UNITS; + + for (idx = 0; idx < chip_max_units; idx++) { + + /* + * This is the base address of the MAC. + */ + + port = A_MAC_CHANNEL_BASE(idx); + + /* + * The R_MAC_ETHERNET_ADDR register will be set to some nonzero + * value for us by the firmware if we're going to use this MAC. + * If we find a zero, skip this MAC. + */ + + sbmac_orig_hwaddr[idx] = SBMAC_READCSR(IOADDR(port+R_MAC_ETHERNET_ADDR)); + if (sbmac_orig_hwaddr[idx] == 0) { + printk(KERN_DEBUG "sbmac: not configuring MAC at " + "%lx\n", port); + continue; + } + + /* + * Okay, cool. Initialize this MAC. + */ + + dev = alloc_etherdev(sizeof(struct sbmac_softc)); + if (!dev) + return -ENOMEM; /* return ENOMEM */ + + printk(KERN_DEBUG "sbmac: configuring MAC at %lx\n", port); + + dev->irq = K_INT_MAC_0 + idx; + dev->base_addr = port; + dev->mem_end = 0; + if (sbmac_init(dev, idx)) { + port = A_MAC_CHANNEL_BASE(idx); + SBMAC_WRITECSR(IOADDR(port+R_MAC_ETHERNET_ADDR), + sbmac_orig_hwaddr[idx]); + free_netdev(dev); + continue; + } + dev_sbmac[idx] = dev; + } + return 0; +} + + +static void __exit +sbmac_cleanup_module(void) +{ + struct net_device *dev; + int idx; + + for (idx = 0; idx < MAX_UNITS; idx++) { + struct sbmac_softc *sc; + dev = dev_sbmac[idx]; + if (!dev) + continue; + + sc = netdev_priv(dev); + unregister_netdev(dev); + sbmac_uninitctx(sc); + free_netdev(dev); + } +} + +module_init(sbmac_init_module); +module_exit(sbmac_cleanup_module); |