diff options
Diffstat (limited to 'drivers/net/ethernet/apple')
| -rw-r--r-- | drivers/net/ethernet/apple/Kconfig | 63 | ||||
| -rw-r--r-- | drivers/net/ethernet/apple/Makefile | 8 | ||||
| -rw-r--r-- | drivers/net/ethernet/apple/bmac.c | 1671 | ||||
| -rw-r--r-- | drivers/net/ethernet/apple/bmac.h | 160 | ||||
| -rw-r--r-- | drivers/net/ethernet/apple/mace.c | 1031 | ||||
| -rw-r--r-- | drivers/net/ethernet/apple/mace.h | 169 | ||||
| -rw-r--r-- | drivers/net/ethernet/apple/macmace.c | 770 |
7 files changed, 3872 insertions, 0 deletions
diff --git a/drivers/net/ethernet/apple/Kconfig b/drivers/net/ethernet/apple/Kconfig new file mode 100644 index 000000000..a4176d2ec --- /dev/null +++ b/drivers/net/ethernet/apple/Kconfig @@ -0,0 +1,63 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Apple device configuration +# + +config NET_VENDOR_APPLE + bool "Apple devices" + default y + depends on (PPC_PMAC && PPC32) || MAC + help + If you have a network (Ethernet) card belonging to this class, say Y. + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all the + questions about Apple devices. If you say Y, you will be asked for + your specific card in the following questions. + +if NET_VENDOR_APPLE + +config MACE + tristate "MACE (Power Mac ethernet) support" + depends on PPC_PMAC && PPC32 + select CRC32 + help + Power Macintoshes and clones with Ethernet built-in on the + motherboard will usually use a MACE (Medium Access Control for + Ethernet) interface. Say Y to include support for the MACE chip. + + To compile this driver as a module, choose M here: the module + will be called mace. + +config MACE_AAUI_PORT + bool "Use AAUI port instead of TP by default" + depends on MACE + help + Some Apple machines (notably the Apple Network Server) which use the + MACE ethernet chip have an Apple AUI port (small 15-pin connector), + instead of an 8-pin RJ45 connector for twisted-pair ethernet. Say + Y here if you have such a machine. If unsure, say N. + The driver will default to AAUI on ANS anyway, and if you use it as + a module, you can provide the port_aaui=0|1 to force the driver. + +config BMAC + tristate "BMAC (G3 ethernet) support" + depends on PPC_PMAC && PPC32 + select CRC32 + help + Say Y for support of BMAC Ethernet interfaces. These are used on G3 + computers. + + To compile this driver as a module, choose M here: the module + will be called bmac. + +config MACMACE + tristate "Macintosh (AV) onboard MACE ethernet" + depends on MAC + select CRC32 + help + Support for the onboard AMD 79C940 MACE Ethernet controller used in + the 660AV and 840AV Macintosh. If you have one of these Macintoshes + say Y here. + +endif # NET_VENDOR_APPLE diff --git a/drivers/net/ethernet/apple/Makefile b/drivers/net/ethernet/apple/Makefile new file mode 100644 index 000000000..322457027 --- /dev/null +++ b/drivers/net/ethernet/apple/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Makefile for the Apple network device drivers. +# + +obj-$(CONFIG_MACE) += mace.o +obj-$(CONFIG_BMAC) += bmac.o +obj-$(CONFIG_MACMACE) += macmace.o diff --git a/drivers/net/ethernet/apple/bmac.c b/drivers/net/ethernet/apple/bmac.c new file mode 100644 index 000000000..9e653e292 --- /dev/null +++ b/drivers/net/ethernet/apple/bmac.c @@ -0,0 +1,1671 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Network device driver for the BMAC ethernet controller on + * Apple Powermacs. Assumes it's under a DBDMA controller. + * + * Copyright (C) 1998 Randy Gobbel. + * + * May 1999, Al Viro: proper release of /proc/net/bmac entry, switched to + * dynamic procfs inode. + */ +#include <linux/interrupt.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/proc_fs.h> +#include <linux/init.h> +#include <linux/spinlock.h> +#include <linux/crc32.h> +#include <linux/crc32poly.h> +#include <linux/bitrev.h> +#include <linux/ethtool.h> +#include <linux/slab.h> +#include <linux/pgtable.h> +#include <asm/dbdma.h> +#include <asm/io.h> +#include <asm/page.h> +#include <asm/machdep.h> +#include <asm/pmac_feature.h> +#include <asm/macio.h> +#include <asm/irq.h> + +#include "bmac.h" + +#define trunc_page(x) ((void *)(((unsigned long)(x)) & ~((unsigned long)(PAGE_SIZE - 1)))) +#define round_page(x) trunc_page(((unsigned long)(x)) + ((unsigned long)(PAGE_SIZE - 1))) + +/* switch to use multicast code lifted from sunhme driver */ +#define SUNHME_MULTICAST + +#define N_RX_RING 64 +#define N_TX_RING 32 +#define MAX_TX_ACTIVE 1 +#define ETHERCRC 4 +#define ETHERMINPACKET 64 +#define ETHERMTU 1500 +#define RX_BUFLEN (ETHERMTU + 14 + ETHERCRC + 2) +#define TX_TIMEOUT HZ /* 1 second */ + +/* Bits in transmit DMA status */ +#define TX_DMA_ERR 0x80 + +#define XXDEBUG(args) + +struct bmac_data { + /* volatile struct bmac *bmac; */ + struct sk_buff_head *queue; + volatile struct dbdma_regs __iomem *tx_dma; + int tx_dma_intr; + volatile struct dbdma_regs __iomem *rx_dma; + int rx_dma_intr; + volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */ + volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */ + struct macio_dev *mdev; + int is_bmac_plus; + struct sk_buff *rx_bufs[N_RX_RING]; + int rx_fill; + int rx_empty; + struct sk_buff *tx_bufs[N_TX_RING]; + int tx_fill; + int tx_empty; + unsigned char tx_fullup; + struct timer_list tx_timeout; + int timeout_active; + int sleeping; + int opened; + unsigned short hash_use_count[64]; + unsigned short hash_table_mask[4]; + spinlock_t lock; +}; + +#if 0 /* Move that to ethtool */ + +typedef struct bmac_reg_entry { + char *name; + unsigned short reg_offset; +} bmac_reg_entry_t; + +#define N_REG_ENTRIES 31 + +static bmac_reg_entry_t reg_entries[N_REG_ENTRIES] = { + {"MEMADD", MEMADD}, + {"MEMDATAHI", MEMDATAHI}, + {"MEMDATALO", MEMDATALO}, + {"TXPNTR", TXPNTR}, + {"RXPNTR", RXPNTR}, + {"IPG1", IPG1}, + {"IPG2", IPG2}, + {"ALIMIT", ALIMIT}, + {"SLOT", SLOT}, + {"PALEN", PALEN}, + {"PAPAT", PAPAT}, + {"TXSFD", TXSFD}, + {"JAM", JAM}, + {"TXCFG", TXCFG}, + {"TXMAX", TXMAX}, + {"TXMIN", TXMIN}, + {"PAREG", PAREG}, + {"DCNT", DCNT}, + {"NCCNT", NCCNT}, + {"NTCNT", NTCNT}, + {"EXCNT", EXCNT}, + {"LTCNT", LTCNT}, + {"TXSM", TXSM}, + {"RXCFG", RXCFG}, + {"RXMAX", RXMAX}, + {"RXMIN", RXMIN}, + {"FRCNT", FRCNT}, + {"AECNT", AECNT}, + {"FECNT", FECNT}, + {"RXSM", RXSM}, + {"RXCV", RXCV} +}; + +#endif + +static unsigned char *bmac_emergency_rxbuf; + +/* + * Number of bytes of private data per BMAC: allow enough for + * the rx and tx dma commands plus a branch dma command each, + * and another 16 bytes to allow us to align the dma command + * buffers on a 16 byte boundary. + */ +#define PRIV_BYTES (sizeof(struct bmac_data) \ + + (N_RX_RING + N_TX_RING + 4) * sizeof(struct dbdma_cmd) \ + + sizeof(struct sk_buff_head)) + +static int bmac_open(struct net_device *dev); +static int bmac_close(struct net_device *dev); +static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev); +static void bmac_set_multicast(struct net_device *dev); +static void bmac_reset_and_enable(struct net_device *dev); +static void bmac_start_chip(struct net_device *dev); +static void bmac_init_chip(struct net_device *dev); +static void bmac_init_registers(struct net_device *dev); +static void bmac_enable_and_reset_chip(struct net_device *dev); +static int bmac_set_address(struct net_device *dev, void *addr); +static irqreturn_t bmac_misc_intr(int irq, void *dev_id); +static irqreturn_t bmac_txdma_intr(int irq, void *dev_id); +static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id); +static void bmac_set_timeout(struct net_device *dev); +static void bmac_tx_timeout(struct timer_list *t); +static netdev_tx_t bmac_output(struct sk_buff *skb, struct net_device *dev); +static void bmac_start(struct net_device *dev); + +#define DBDMA_SET(x) ( ((x) | (x) << 16) ) +#define DBDMA_CLEAR(x) ( (x) << 16) + +static inline void +dbdma_st32(volatile __u32 __iomem *a, unsigned long x) +{ + __asm__ volatile( "stwbrx %0,0,%1" : : "r" (x), "r" (a) : "memory"); +} + +static inline unsigned long +dbdma_ld32(volatile __u32 __iomem *a) +{ + __u32 swap; + __asm__ volatile ("lwbrx %0,0,%1" : "=r" (swap) : "r" (a)); + return swap; +} + +static void +dbdma_continue(volatile struct dbdma_regs __iomem *dmap) +{ + dbdma_st32(&dmap->control, + DBDMA_SET(RUN|WAKE) | DBDMA_CLEAR(PAUSE|DEAD)); + eieio(); +} + +static void +dbdma_reset(volatile struct dbdma_regs __iomem *dmap) +{ + dbdma_st32(&dmap->control, + DBDMA_CLEAR(ACTIVE|DEAD|WAKE|FLUSH|PAUSE|RUN)); + eieio(); + while (dbdma_ld32(&dmap->status) & RUN) + eieio(); +} + +static void +dbdma_setcmd(volatile struct dbdma_cmd *cp, + unsigned short cmd, unsigned count, unsigned long addr, + unsigned long cmd_dep) +{ + out_le16(&cp->command, cmd); + out_le16(&cp->req_count, count); + out_le32(&cp->phy_addr, addr); + out_le32(&cp->cmd_dep, cmd_dep); + out_le16(&cp->xfer_status, 0); + out_le16(&cp->res_count, 0); +} + +static inline +void bmwrite(struct net_device *dev, unsigned long reg_offset, unsigned data ) +{ + out_le16((void __iomem *)dev->base_addr + reg_offset, data); +} + + +static inline +unsigned short bmread(struct net_device *dev, unsigned long reg_offset ) +{ + return in_le16((void __iomem *)dev->base_addr + reg_offset); +} + +static void +bmac_enable_and_reset_chip(struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + volatile struct dbdma_regs __iomem *rd = bp->rx_dma; + volatile struct dbdma_regs __iomem *td = bp->tx_dma; + + if (rd) + dbdma_reset(rd); + if (td) + dbdma_reset(td); + + pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 1); +} + +#define MIFDELAY udelay(10) + +static unsigned int +bmac_mif_readbits(struct net_device *dev, int nb) +{ + unsigned int val = 0; + + while (--nb >= 0) { + bmwrite(dev, MIFCSR, 0); + MIFDELAY; + if (bmread(dev, MIFCSR) & 8) + val |= 1 << nb; + bmwrite(dev, MIFCSR, 1); + MIFDELAY; + } + bmwrite(dev, MIFCSR, 0); + MIFDELAY; + bmwrite(dev, MIFCSR, 1); + MIFDELAY; + return val; +} + +static void +bmac_mif_writebits(struct net_device *dev, unsigned int val, int nb) +{ + int b; + + while (--nb >= 0) { + b = (val & (1 << nb))? 6: 4; + bmwrite(dev, MIFCSR, b); + MIFDELAY; + bmwrite(dev, MIFCSR, b|1); + MIFDELAY; + } +} + +static unsigned int +bmac_mif_read(struct net_device *dev, unsigned int addr) +{ + unsigned int val; + + bmwrite(dev, MIFCSR, 4); + MIFDELAY; + bmac_mif_writebits(dev, ~0U, 32); + bmac_mif_writebits(dev, 6, 4); + bmac_mif_writebits(dev, addr, 10); + bmwrite(dev, MIFCSR, 2); + MIFDELAY; + bmwrite(dev, MIFCSR, 1); + MIFDELAY; + val = bmac_mif_readbits(dev, 17); + bmwrite(dev, MIFCSR, 4); + MIFDELAY; + return val; +} + +static void +bmac_mif_write(struct net_device *dev, unsigned int addr, unsigned int val) +{ + bmwrite(dev, MIFCSR, 4); + MIFDELAY; + bmac_mif_writebits(dev, ~0U, 32); + bmac_mif_writebits(dev, 5, 4); + bmac_mif_writebits(dev, addr, 10); + bmac_mif_writebits(dev, 2, 2); + bmac_mif_writebits(dev, val, 16); + bmac_mif_writebits(dev, 3, 2); +} + +static void +bmac_init_registers(struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + volatile unsigned short regValue; + const unsigned short *pWord16; + int i; + + /* XXDEBUG(("bmac: enter init_registers\n")); */ + + bmwrite(dev, RXRST, RxResetValue); + bmwrite(dev, TXRST, TxResetBit); + + i = 100; + do { + --i; + udelay(10000); + regValue = bmread(dev, TXRST); /* wait for reset to clear..acknowledge */ + } while ((regValue & TxResetBit) && i > 0); + + if (!bp->is_bmac_plus) { + regValue = bmread(dev, XCVRIF); + regValue |= ClkBit | SerialMode | COLActiveLow; + bmwrite(dev, XCVRIF, regValue); + udelay(10000); + } + + bmwrite(dev, RSEED, (unsigned short)0x1968); + + regValue = bmread(dev, XIFC); + regValue |= TxOutputEnable; + bmwrite(dev, XIFC, regValue); + + bmread(dev, PAREG); + + /* set collision counters to 0 */ + bmwrite(dev, NCCNT, 0); + bmwrite(dev, NTCNT, 0); + bmwrite(dev, EXCNT, 0); + bmwrite(dev, LTCNT, 0); + + /* set rx counters to 0 */ + bmwrite(dev, FRCNT, 0); + bmwrite(dev, LECNT, 0); + bmwrite(dev, AECNT, 0); + bmwrite(dev, FECNT, 0); + bmwrite(dev, RXCV, 0); + + /* set tx fifo information */ + bmwrite(dev, TXTH, 4); /* 4 octets before tx starts */ + + bmwrite(dev, TXFIFOCSR, 0); /* first disable txFIFO */ + bmwrite(dev, TXFIFOCSR, TxFIFOEnable ); + + /* set rx fifo information */ + bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */ + bmwrite(dev, RXFIFOCSR, RxFIFOEnable ); + + //bmwrite(dev, TXCFG, TxMACEnable); /* TxNeverGiveUp maybe later */ + bmread(dev, STATUS); /* read it just to clear it */ + + /* zero out the chip Hash Filter registers */ + for (i=0; i<4; i++) bp->hash_table_mask[i] = 0; + bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */ + bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */ + bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */ + bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */ + + pWord16 = (const unsigned short *)dev->dev_addr; + bmwrite(dev, MADD0, *pWord16++); + bmwrite(dev, MADD1, *pWord16++); + bmwrite(dev, MADD2, *pWord16); + + bmwrite(dev, RXCFG, RxCRCNoStrip | RxHashFilterEnable | RxRejectOwnPackets); + + bmwrite(dev, INTDISABLE, EnableNormal); +} + +#if 0 +static void +bmac_disable_interrupts(struct net_device *dev) +{ + bmwrite(dev, INTDISABLE, DisableAll); +} + +static void +bmac_enable_interrupts(struct net_device *dev) +{ + bmwrite(dev, INTDISABLE, EnableNormal); +} +#endif + + +static void +bmac_start_chip(struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + volatile struct dbdma_regs __iomem *rd = bp->rx_dma; + unsigned short oldConfig; + + /* enable rx dma channel */ + dbdma_continue(rd); + + oldConfig = bmread(dev, TXCFG); + bmwrite(dev, TXCFG, oldConfig | TxMACEnable ); + + /* turn on rx plus any other bits already on (promiscuous possibly) */ + oldConfig = bmread(dev, RXCFG); + bmwrite(dev, RXCFG, oldConfig | RxMACEnable ); + udelay(20000); +} + +static void +bmac_init_phy(struct net_device *dev) +{ + unsigned int addr; + struct bmac_data *bp = netdev_priv(dev); + + printk(KERN_DEBUG "phy registers:"); + for (addr = 0; addr < 32; ++addr) { + if ((addr & 7) == 0) + printk(KERN_DEBUG); + printk(KERN_CONT " %.4x", bmac_mif_read(dev, addr)); + } + printk(KERN_CONT "\n"); + + if (bp->is_bmac_plus) { + unsigned int capable, ctrl; + + ctrl = bmac_mif_read(dev, 0); + capable = ((bmac_mif_read(dev, 1) & 0xf800) >> 6) | 1; + if (bmac_mif_read(dev, 4) != capable || + (ctrl & 0x1000) == 0) { + bmac_mif_write(dev, 4, capable); + bmac_mif_write(dev, 0, 0x1200); + } else + bmac_mif_write(dev, 0, 0x1000); + } +} + +static void bmac_init_chip(struct net_device *dev) +{ + bmac_init_phy(dev); + bmac_init_registers(dev); +} + +#ifdef CONFIG_PM +static int bmac_suspend(struct macio_dev *mdev, pm_message_t state) +{ + struct net_device* dev = macio_get_drvdata(mdev); + struct bmac_data *bp = netdev_priv(dev); + unsigned long flags; + unsigned short config; + int i; + + netif_device_detach(dev); + /* prolly should wait for dma to finish & turn off the chip */ + spin_lock_irqsave(&bp->lock, flags); + if (bp->timeout_active) { + del_timer(&bp->tx_timeout); + bp->timeout_active = 0; + } + disable_irq(dev->irq); + disable_irq(bp->tx_dma_intr); + disable_irq(bp->rx_dma_intr); + bp->sleeping = 1; + spin_unlock_irqrestore(&bp->lock, flags); + if (bp->opened) { + volatile struct dbdma_regs __iomem *rd = bp->rx_dma; + volatile struct dbdma_regs __iomem *td = bp->tx_dma; + + config = bmread(dev, RXCFG); + bmwrite(dev, RXCFG, (config & ~RxMACEnable)); + config = bmread(dev, TXCFG); + bmwrite(dev, TXCFG, (config & ~TxMACEnable)); + bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */ + /* disable rx and tx dma */ + rd->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */ + td->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */ + /* free some skb's */ + for (i=0; i<N_RX_RING; i++) { + if (bp->rx_bufs[i] != NULL) { + dev_kfree_skb(bp->rx_bufs[i]); + bp->rx_bufs[i] = NULL; + } + } + for (i = 0; i<N_TX_RING; i++) { + if (bp->tx_bufs[i] != NULL) { + dev_kfree_skb(bp->tx_bufs[i]); + bp->tx_bufs[i] = NULL; + } + } + } + pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0); + return 0; +} + +static int bmac_resume(struct macio_dev *mdev) +{ + struct net_device* dev = macio_get_drvdata(mdev); + struct bmac_data *bp = netdev_priv(dev); + + /* see if this is enough */ + if (bp->opened) + bmac_reset_and_enable(dev); + + enable_irq(dev->irq); + enable_irq(bp->tx_dma_intr); + enable_irq(bp->rx_dma_intr); + netif_device_attach(dev); + + return 0; +} +#endif /* CONFIG_PM */ + +static int bmac_set_address(struct net_device *dev, void *addr) +{ + struct bmac_data *bp = netdev_priv(dev); + const unsigned short *pWord16; + unsigned long flags; + + XXDEBUG(("bmac: enter set_address\n")); + spin_lock_irqsave(&bp->lock, flags); + + eth_hw_addr_set(dev, addr); + + /* load up the hardware address */ + pWord16 = (const unsigned short *)dev->dev_addr; + bmwrite(dev, MADD0, *pWord16++); + bmwrite(dev, MADD1, *pWord16++); + bmwrite(dev, MADD2, *pWord16); + + spin_unlock_irqrestore(&bp->lock, flags); + XXDEBUG(("bmac: exit set_address\n")); + return 0; +} + +static inline void bmac_set_timeout(struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&bp->lock, flags); + if (bp->timeout_active) + del_timer(&bp->tx_timeout); + bp->tx_timeout.expires = jiffies + TX_TIMEOUT; + add_timer(&bp->tx_timeout); + bp->timeout_active = 1; + spin_unlock_irqrestore(&bp->lock, flags); +} + +static void +bmac_construct_xmt(struct sk_buff *skb, volatile struct dbdma_cmd *cp) +{ + void *vaddr; + unsigned long baddr; + unsigned long len; + + len = skb->len; + vaddr = skb->data; + baddr = virt_to_bus(vaddr); + + dbdma_setcmd(cp, (OUTPUT_LAST | INTR_ALWAYS | WAIT_IFCLR), len, baddr, 0); +} + +static void +bmac_construct_rxbuff(struct sk_buff *skb, volatile struct dbdma_cmd *cp) +{ + unsigned char *addr = skb? skb->data: bmac_emergency_rxbuf; + + dbdma_setcmd(cp, (INPUT_LAST | INTR_ALWAYS), RX_BUFLEN, + virt_to_bus(addr), 0); +} + +static void +bmac_init_tx_ring(struct bmac_data *bp) +{ + volatile struct dbdma_regs __iomem *td = bp->tx_dma; + + memset((char *)bp->tx_cmds, 0, (N_TX_RING+1) * sizeof(struct dbdma_cmd)); + + bp->tx_empty = 0; + bp->tx_fill = 0; + bp->tx_fullup = 0; + + /* put a branch at the end of the tx command list */ + dbdma_setcmd(&bp->tx_cmds[N_TX_RING], + (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->tx_cmds)); + + /* reset tx dma */ + dbdma_reset(td); + out_le32(&td->wait_sel, 0x00200020); + out_le32(&td->cmdptr, virt_to_bus(bp->tx_cmds)); +} + +static int +bmac_init_rx_ring(struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + volatile struct dbdma_regs __iomem *rd = bp->rx_dma; + int i; + struct sk_buff *skb; + + /* initialize list of sk_buffs for receiving and set up recv dma */ + memset((char *)bp->rx_cmds, 0, + (N_RX_RING + 1) * sizeof(struct dbdma_cmd)); + for (i = 0; i < N_RX_RING; i++) { + if ((skb = bp->rx_bufs[i]) == NULL) { + bp->rx_bufs[i] = skb = netdev_alloc_skb(dev, RX_BUFLEN + 2); + if (skb != NULL) + skb_reserve(skb, 2); + } + bmac_construct_rxbuff(skb, &bp->rx_cmds[i]); + } + + bp->rx_empty = 0; + bp->rx_fill = i; + + /* Put a branch back to the beginning of the receive command list */ + dbdma_setcmd(&bp->rx_cmds[N_RX_RING], + (DBDMA_NOP | BR_ALWAYS), 0, 0, virt_to_bus(bp->rx_cmds)); + + /* start rx dma */ + dbdma_reset(rd); + out_le32(&rd->cmdptr, virt_to_bus(bp->rx_cmds)); + + return 1; +} + + +static int bmac_transmit_packet(struct sk_buff *skb, struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + volatile struct dbdma_regs __iomem *td = bp->tx_dma; + int i; + + /* see if there's a free slot in the tx ring */ + /* XXDEBUG(("bmac_xmit_start: empty=%d fill=%d\n", */ + /* bp->tx_empty, bp->tx_fill)); */ + i = bp->tx_fill + 1; + if (i >= N_TX_RING) + i = 0; + if (i == bp->tx_empty) { + netif_stop_queue(dev); + bp->tx_fullup = 1; + XXDEBUG(("bmac_transmit_packet: tx ring full\n")); + return -1; /* can't take it at the moment */ + } + + dbdma_setcmd(&bp->tx_cmds[i], DBDMA_STOP, 0, 0, 0); + + bmac_construct_xmt(skb, &bp->tx_cmds[bp->tx_fill]); + + bp->tx_bufs[bp->tx_fill] = skb; + bp->tx_fill = i; + + dev->stats.tx_bytes += skb->len; + + dbdma_continue(td); + + return 0; +} + +static int rxintcount; + +static irqreturn_t bmac_rxdma_intr(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *) dev_id; + struct bmac_data *bp = netdev_priv(dev); + volatile struct dbdma_regs __iomem *rd = bp->rx_dma; + volatile struct dbdma_cmd *cp; + int i, nb, stat; + struct sk_buff *skb; + unsigned int residual; + int last; + unsigned long flags; + + spin_lock_irqsave(&bp->lock, flags); + + if (++rxintcount < 10) { + XXDEBUG(("bmac_rxdma_intr\n")); + } + + last = -1; + i = bp->rx_empty; + + while (1) { + cp = &bp->rx_cmds[i]; + stat = le16_to_cpu(cp->xfer_status); + residual = le16_to_cpu(cp->res_count); + if ((stat & ACTIVE) == 0) + break; + nb = RX_BUFLEN - residual - 2; + if (nb < (ETHERMINPACKET - ETHERCRC)) { + skb = NULL; + dev->stats.rx_length_errors++; + dev->stats.rx_errors++; + } else { + skb = bp->rx_bufs[i]; + bp->rx_bufs[i] = NULL; + } + if (skb != NULL) { + nb -= ETHERCRC; + skb_put(skb, nb); + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + ++dev->stats.rx_packets; + dev->stats.rx_bytes += nb; + } else { + ++dev->stats.rx_dropped; + } + if ((skb = bp->rx_bufs[i]) == NULL) { + bp->rx_bufs[i] = skb = netdev_alloc_skb(dev, RX_BUFLEN + 2); + if (skb != NULL) + skb_reserve(bp->rx_bufs[i], 2); + } + bmac_construct_rxbuff(skb, &bp->rx_cmds[i]); + cp->res_count = cpu_to_le16(0); + cp->xfer_status = cpu_to_le16(0); + last = i; + if (++i >= N_RX_RING) i = 0; + } + + if (last != -1) { + bp->rx_fill = last; + bp->rx_empty = i; + } + + dbdma_continue(rd); + spin_unlock_irqrestore(&bp->lock, flags); + + if (rxintcount < 10) { + XXDEBUG(("bmac_rxdma_intr done\n")); + } + return IRQ_HANDLED; +} + +static int txintcount; + +static irqreturn_t bmac_txdma_intr(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *) dev_id; + struct bmac_data *bp = netdev_priv(dev); + volatile struct dbdma_cmd *cp; + int stat; + unsigned long flags; + + spin_lock_irqsave(&bp->lock, flags); + + if (txintcount++ < 10) { + XXDEBUG(("bmac_txdma_intr\n")); + } + + /* del_timer(&bp->tx_timeout); */ + /* bp->timeout_active = 0; */ + + while (1) { + cp = &bp->tx_cmds[bp->tx_empty]; + stat = le16_to_cpu(cp->xfer_status); + if (txintcount < 10) { + XXDEBUG(("bmac_txdma_xfer_stat=%#0x\n", stat)); + } + if (!(stat & ACTIVE)) { + /* + * status field might not have been filled by DBDMA + */ + if (cp == bus_to_virt(in_le32(&bp->tx_dma->cmdptr))) + break; + } + + if (bp->tx_bufs[bp->tx_empty]) { + ++dev->stats.tx_packets; + dev_consume_skb_irq(bp->tx_bufs[bp->tx_empty]); + } + bp->tx_bufs[bp->tx_empty] = NULL; + bp->tx_fullup = 0; + netif_wake_queue(dev); + if (++bp->tx_empty >= N_TX_RING) + bp->tx_empty = 0; + if (bp->tx_empty == bp->tx_fill) + break; + } + + spin_unlock_irqrestore(&bp->lock, flags); + + if (txintcount < 10) { + XXDEBUG(("bmac_txdma_intr done->bmac_start\n")); + } + + bmac_start(dev); + return IRQ_HANDLED; +} + +#ifndef SUNHME_MULTICAST +/* Real fast bit-reversal algorithm, 6-bit values */ +static int reverse6[64] = { + 0x0,0x20,0x10,0x30,0x8,0x28,0x18,0x38, + 0x4,0x24,0x14,0x34,0xc,0x2c,0x1c,0x3c, + 0x2,0x22,0x12,0x32,0xa,0x2a,0x1a,0x3a, + 0x6,0x26,0x16,0x36,0xe,0x2e,0x1e,0x3e, + 0x1,0x21,0x11,0x31,0x9,0x29,0x19,0x39, + 0x5,0x25,0x15,0x35,0xd,0x2d,0x1d,0x3d, + 0x3,0x23,0x13,0x33,0xb,0x2b,0x1b,0x3b, + 0x7,0x27,0x17,0x37,0xf,0x2f,0x1f,0x3f +}; + +static unsigned int +crc416(unsigned int curval, unsigned short nxtval) +{ + unsigned int counter, cur = curval, next = nxtval; + int high_crc_set, low_data_set; + + /* Swap bytes */ + next = ((next & 0x00FF) << 8) | (next >> 8); + + /* Compute bit-by-bit */ + for (counter = 0; counter < 16; ++counter) { + /* is high CRC bit set? */ + if ((cur & 0x80000000) == 0) high_crc_set = 0; + else high_crc_set = 1; + + cur = cur << 1; + + if ((next & 0x0001) == 0) low_data_set = 0; + else low_data_set = 1; + + next = next >> 1; + + /* do the XOR */ + if (high_crc_set ^ low_data_set) cur = cur ^ CRC32_POLY_BE; + } + return cur; +} + +static unsigned int +bmac_crc(unsigned short *address) +{ + unsigned int newcrc; + + XXDEBUG(("bmac_crc: addr=%#04x, %#04x, %#04x\n", *address, address[1], address[2])); + newcrc = crc416(0xffffffff, *address); /* address bits 47 - 32 */ + newcrc = crc416(newcrc, address[1]); /* address bits 31 - 16 */ + newcrc = crc416(newcrc, address[2]); /* address bits 15 - 0 */ + + return(newcrc); +} + +/* + * Add requested mcast addr to BMac's hash table filter. + * + */ + +static void +bmac_addhash(struct bmac_data *bp, unsigned char *addr) +{ + unsigned int crc; + unsigned short mask; + + if (!(*addr)) return; + crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */ + crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */ + if (bp->hash_use_count[crc]++) return; /* This bit is already set */ + mask = crc % 16; + mask = (unsigned char)1 << mask; + bp->hash_use_count[crc/16] |= mask; +} + +static void +bmac_removehash(struct bmac_data *bp, unsigned char *addr) +{ + unsigned int crc; + unsigned char mask; + + /* Now, delete the address from the filter copy, as indicated */ + crc = bmac_crc((unsigned short *)addr) & 0x3f; /* Big-endian alert! */ + crc = reverse6[crc]; /* Hyperfast bit-reversing algorithm */ + if (bp->hash_use_count[crc] == 0) return; /* That bit wasn't in use! */ + if (--bp->hash_use_count[crc]) return; /* That bit is still in use */ + mask = crc % 16; + mask = ((unsigned char)1 << mask) ^ 0xffff; /* To turn off bit */ + bp->hash_table_mask[crc/16] &= mask; +} + +/* + * Sync the adapter with the software copy of the multicast mask + * (logical address filter). + */ + +static void +bmac_rx_off(struct net_device *dev) +{ + unsigned short rx_cfg; + + rx_cfg = bmread(dev, RXCFG); + rx_cfg &= ~RxMACEnable; + bmwrite(dev, RXCFG, rx_cfg); + do { + rx_cfg = bmread(dev, RXCFG); + } while (rx_cfg & RxMACEnable); +} + +unsigned short +bmac_rx_on(struct net_device *dev, int hash_enable, int promisc_enable) +{ + unsigned short rx_cfg; + + rx_cfg = bmread(dev, RXCFG); + rx_cfg |= RxMACEnable; + if (hash_enable) rx_cfg |= RxHashFilterEnable; + else rx_cfg &= ~RxHashFilterEnable; + if (promisc_enable) rx_cfg |= RxPromiscEnable; + else rx_cfg &= ~RxPromiscEnable; + bmwrite(dev, RXRST, RxResetValue); + bmwrite(dev, RXFIFOCSR, 0); /* first disable rxFIFO */ + bmwrite(dev, RXFIFOCSR, RxFIFOEnable ); + bmwrite(dev, RXCFG, rx_cfg ); + return rx_cfg; +} + +static void +bmac_update_hash_table_mask(struct net_device *dev, struct bmac_data *bp) +{ + bmwrite(dev, BHASH3, bp->hash_table_mask[0]); /* bits 15 - 0 */ + bmwrite(dev, BHASH2, bp->hash_table_mask[1]); /* bits 31 - 16 */ + bmwrite(dev, BHASH1, bp->hash_table_mask[2]); /* bits 47 - 32 */ + bmwrite(dev, BHASH0, bp->hash_table_mask[3]); /* bits 63 - 48 */ +} + +#if 0 +static void +bmac_add_multi(struct net_device *dev, + struct bmac_data *bp, unsigned char *addr) +{ + /* XXDEBUG(("bmac: enter bmac_add_multi\n")); */ + bmac_addhash(bp, addr); + bmac_rx_off(dev); + bmac_update_hash_table_mask(dev, bp); + bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0); + /* XXDEBUG(("bmac: exit bmac_add_multi\n")); */ +} + +static void +bmac_remove_multi(struct net_device *dev, + struct bmac_data *bp, unsigned char *addr) +{ + bmac_removehash(bp, addr); + bmac_rx_off(dev); + bmac_update_hash_table_mask(dev, bp); + bmac_rx_on(dev, 1, (dev->flags & IFF_PROMISC)? 1 : 0); +} +#endif + +/* Set or clear the multicast filter for this adaptor. + num_addrs == -1 Promiscuous mode, receive all packets + num_addrs == 0 Normal mode, clear multicast list + num_addrs > 0 Multicast mode, receive normal and MC packets, and do + best-effort filtering. + */ +static void bmac_set_multicast(struct net_device *dev) +{ + struct netdev_hw_addr *ha; + struct bmac_data *bp = netdev_priv(dev); + int num_addrs = netdev_mc_count(dev); + unsigned short rx_cfg; + int i; + + if (bp->sleeping) + return; + + XXDEBUG(("bmac: enter bmac_set_multicast, n_addrs=%d\n", num_addrs)); + + if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) { + for (i=0; i<4; i++) bp->hash_table_mask[i] = 0xffff; + bmac_update_hash_table_mask(dev, bp); + rx_cfg = bmac_rx_on(dev, 1, 0); + XXDEBUG(("bmac: all multi, rx_cfg=%#08x\n")); + } else if ((dev->flags & IFF_PROMISC) || (num_addrs < 0)) { + rx_cfg = bmread(dev, RXCFG); + rx_cfg |= RxPromiscEnable; + bmwrite(dev, RXCFG, rx_cfg); + rx_cfg = bmac_rx_on(dev, 0, 1); + XXDEBUG(("bmac: promisc mode enabled, rx_cfg=%#08x\n", rx_cfg)); + } else { + for (i=0; i<4; i++) bp->hash_table_mask[i] = 0; + for (i=0; i<64; i++) bp->hash_use_count[i] = 0; + if (num_addrs == 0) { + rx_cfg = bmac_rx_on(dev, 0, 0); + XXDEBUG(("bmac: multi disabled, rx_cfg=%#08x\n", rx_cfg)); + } else { + netdev_for_each_mc_addr(ha, dev) + bmac_addhash(bp, ha->addr); + bmac_update_hash_table_mask(dev, bp); + rx_cfg = bmac_rx_on(dev, 1, 0); + XXDEBUG(("bmac: multi enabled, rx_cfg=%#08x\n", rx_cfg)); + } + } + /* XXDEBUG(("bmac: exit bmac_set_multicast\n")); */ +} +#else /* ifdef SUNHME_MULTICAST */ + +/* The version of set_multicast below was lifted from sunhme.c */ + +static void bmac_set_multicast(struct net_device *dev) +{ + struct netdev_hw_addr *ha; + unsigned short rx_cfg; + u32 crc; + + if((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) { + bmwrite(dev, BHASH0, 0xffff); + bmwrite(dev, BHASH1, 0xffff); + bmwrite(dev, BHASH2, 0xffff); + bmwrite(dev, BHASH3, 0xffff); + } else if(dev->flags & IFF_PROMISC) { + rx_cfg = bmread(dev, RXCFG); + rx_cfg |= RxPromiscEnable; + bmwrite(dev, RXCFG, rx_cfg); + } else { + u16 hash_table[4] = { 0 }; + + rx_cfg = bmread(dev, RXCFG); + rx_cfg &= ~RxPromiscEnable; + bmwrite(dev, RXCFG, rx_cfg); + + netdev_for_each_mc_addr(ha, dev) { + crc = ether_crc_le(6, ha->addr); + crc >>= 26; + hash_table[crc >> 4] |= 1 << (crc & 0xf); + } + bmwrite(dev, BHASH0, hash_table[0]); + bmwrite(dev, BHASH1, hash_table[1]); + bmwrite(dev, BHASH2, hash_table[2]); + bmwrite(dev, BHASH3, hash_table[3]); + } +} +#endif /* SUNHME_MULTICAST */ + +static int miscintcount; + +static irqreturn_t bmac_misc_intr(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *) dev_id; + unsigned int status = bmread(dev, STATUS); + if (miscintcount++ < 10) { + XXDEBUG(("bmac_misc_intr\n")); + } + /* XXDEBUG(("bmac_misc_intr, status=%#08x\n", status)); */ + /* bmac_txdma_intr_inner(irq, dev_id); */ + /* if (status & FrameReceived) dev->stats.rx_dropped++; */ + if (status & RxErrorMask) dev->stats.rx_errors++; + if (status & RxCRCCntExp) dev->stats.rx_crc_errors++; + if (status & RxLenCntExp) dev->stats.rx_length_errors++; + if (status & RxOverFlow) dev->stats.rx_over_errors++; + if (status & RxAlignCntExp) dev->stats.rx_frame_errors++; + + /* if (status & FrameSent) dev->stats.tx_dropped++; */ + if (status & TxErrorMask) dev->stats.tx_errors++; + if (status & TxUnderrun) dev->stats.tx_fifo_errors++; + if (status & TxNormalCollExp) dev->stats.collisions++; + return IRQ_HANDLED; +} + +/* + * Procedure for reading EEPROM + */ +#define SROMAddressLength 5 +#define DataInOn 0x0008 +#define DataInOff 0x0000 +#define Clk 0x0002 +#define ChipSelect 0x0001 +#define SDIShiftCount 3 +#define SD0ShiftCount 2 +#define DelayValue 1000 /* number of microseconds */ +#define SROMStartOffset 10 /* this is in words */ +#define SROMReadCount 3 /* number of words to read from SROM */ +#define SROMAddressBits 6 +#define EnetAddressOffset 20 + +static unsigned char +bmac_clock_out_bit(struct net_device *dev) +{ + unsigned short data; + unsigned short val; + + bmwrite(dev, SROMCSR, ChipSelect | Clk); + udelay(DelayValue); + + data = bmread(dev, SROMCSR); + udelay(DelayValue); + val = (data >> SD0ShiftCount) & 1; + + bmwrite(dev, SROMCSR, ChipSelect); + udelay(DelayValue); + + return val; +} + +static void +bmac_clock_in_bit(struct net_device *dev, unsigned int val) +{ + unsigned short data; + + if (val != 0 && val != 1) return; + + data = (val << SDIShiftCount); + bmwrite(dev, SROMCSR, data | ChipSelect ); + udelay(DelayValue); + + bmwrite(dev, SROMCSR, data | ChipSelect | Clk ); + udelay(DelayValue); + + bmwrite(dev, SROMCSR, data | ChipSelect); + udelay(DelayValue); +} + +static void +reset_and_select_srom(struct net_device *dev) +{ + /* first reset */ + bmwrite(dev, SROMCSR, 0); + udelay(DelayValue); + + /* send it the read command (110) */ + bmac_clock_in_bit(dev, 1); + bmac_clock_in_bit(dev, 1); + bmac_clock_in_bit(dev, 0); +} + +static unsigned short +read_srom(struct net_device *dev, unsigned int addr, unsigned int addr_len) +{ + unsigned short data, val; + int i; + + /* send out the address we want to read from */ + for (i = 0; i < addr_len; i++) { + val = addr >> (addr_len-i-1); + bmac_clock_in_bit(dev, val & 1); + } + + /* Now read in the 16-bit data */ + data = 0; + for (i = 0; i < 16; i++) { + val = bmac_clock_out_bit(dev); + data <<= 1; + data |= val; + } + bmwrite(dev, SROMCSR, 0); + + return data; +} + +/* + * It looks like Cogent and SMC use different methods for calculating + * checksums. What a pain.. + */ + +static int +bmac_verify_checksum(struct net_device *dev) +{ + unsigned short data, storedCS; + + reset_and_select_srom(dev); + data = read_srom(dev, 3, SROMAddressBits); + storedCS = ((data >> 8) & 0x0ff) | ((data << 8) & 0xff00); + + return 0; +} + + +static void +bmac_get_station_address(struct net_device *dev, unsigned char *ea) +{ + int i; + unsigned short data; + + for (i = 0; i < 3; i++) + { + reset_and_select_srom(dev); + data = read_srom(dev, i + EnetAddressOffset/2, SROMAddressBits); + ea[2*i] = bitrev8(data & 0x0ff); + ea[2*i+1] = bitrev8((data >> 8) & 0x0ff); + } +} + +static void bmac_reset_and_enable(struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + unsigned long flags; + struct sk_buff *skb; + unsigned char *data; + + spin_lock_irqsave(&bp->lock, flags); + bmac_enable_and_reset_chip(dev); + bmac_init_tx_ring(bp); + bmac_init_rx_ring(dev); + bmac_init_chip(dev); + bmac_start_chip(dev); + bmwrite(dev, INTDISABLE, EnableNormal); + bp->sleeping = 0; + + /* + * It seems that the bmac can't receive until it's transmitted + * a packet. So we give it a dummy packet to transmit. + */ + skb = netdev_alloc_skb(dev, ETHERMINPACKET); + if (skb != NULL) { + data = skb_put_zero(skb, ETHERMINPACKET); + memcpy(data, dev->dev_addr, ETH_ALEN); + memcpy(data + ETH_ALEN, dev->dev_addr, ETH_ALEN); + bmac_transmit_packet(skb, dev); + } + spin_unlock_irqrestore(&bp->lock, flags); +} + +static const struct ethtool_ops bmac_ethtool_ops = { + .get_link = ethtool_op_get_link, +}; + +static const struct net_device_ops bmac_netdev_ops = { + .ndo_open = bmac_open, + .ndo_stop = bmac_close, + .ndo_start_xmit = bmac_output, + .ndo_set_rx_mode = bmac_set_multicast, + .ndo_set_mac_address = bmac_set_address, + .ndo_validate_addr = eth_validate_addr, +}; + +static int bmac_probe(struct macio_dev *mdev, const struct of_device_id *match) +{ + int j, rev, ret; + struct bmac_data *bp; + const unsigned char *prop_addr; + unsigned char addr[6]; + u8 macaddr[6]; + struct net_device *dev; + int is_bmac_plus = ((int)match->data) != 0; + + if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) { + printk(KERN_ERR "BMAC: can't use, need 3 addrs and 3 intrs\n"); + return -ENODEV; + } + prop_addr = of_get_property(macio_get_of_node(mdev), + "mac-address", NULL); + if (prop_addr == NULL) { + prop_addr = of_get_property(macio_get_of_node(mdev), + "local-mac-address", NULL); + if (prop_addr == NULL) { + printk(KERN_ERR "BMAC: Can't get mac-address\n"); + return -ENODEV; + } + } + memcpy(addr, prop_addr, sizeof(addr)); + + dev = alloc_etherdev(PRIV_BYTES); + if (!dev) + return -ENOMEM; + + bp = netdev_priv(dev); + SET_NETDEV_DEV(dev, &mdev->ofdev.dev); + macio_set_drvdata(mdev, dev); + + bp->mdev = mdev; + spin_lock_init(&bp->lock); + + if (macio_request_resources(mdev, "bmac")) { + printk(KERN_ERR "BMAC: can't request IO resource !\n"); + goto out_free; + } + + dev->base_addr = (unsigned long) + ioremap(macio_resource_start(mdev, 0), macio_resource_len(mdev, 0)); + if (dev->base_addr == 0) + goto out_release; + + dev->irq = macio_irq(mdev, 0); + + bmac_enable_and_reset_chip(dev); + bmwrite(dev, INTDISABLE, DisableAll); + + rev = addr[0] == 0 && addr[1] == 0xA0; + for (j = 0; j < 6; ++j) + macaddr[j] = rev ? bitrev8(addr[j]): addr[j]; + + eth_hw_addr_set(dev, macaddr); + + /* Enable chip without interrupts for now */ + bmac_enable_and_reset_chip(dev); + bmwrite(dev, INTDISABLE, DisableAll); + + dev->netdev_ops = &bmac_netdev_ops; + dev->ethtool_ops = &bmac_ethtool_ops; + + bmac_get_station_address(dev, addr); + if (bmac_verify_checksum(dev) != 0) + goto err_out_iounmap; + + bp->is_bmac_plus = is_bmac_plus; + bp->tx_dma = ioremap(macio_resource_start(mdev, 1), macio_resource_len(mdev, 1)); + if (!bp->tx_dma) + goto err_out_iounmap; + bp->tx_dma_intr = macio_irq(mdev, 1); + bp->rx_dma = ioremap(macio_resource_start(mdev, 2), macio_resource_len(mdev, 2)); + if (!bp->rx_dma) + goto err_out_iounmap_tx; + bp->rx_dma_intr = macio_irq(mdev, 2); + + bp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(bp + 1); + bp->rx_cmds = bp->tx_cmds + N_TX_RING + 1; + + bp->queue = (struct sk_buff_head *)(bp->rx_cmds + N_RX_RING + 1); + skb_queue_head_init(bp->queue); + + timer_setup(&bp->tx_timeout, bmac_tx_timeout, 0); + + ret = request_irq(dev->irq, bmac_misc_intr, 0, "BMAC-misc", dev); + if (ret) { + printk(KERN_ERR "BMAC: can't get irq %d\n", dev->irq); + goto err_out_iounmap_rx; + } + ret = request_irq(bp->tx_dma_intr, bmac_txdma_intr, 0, "BMAC-txdma", dev); + if (ret) { + printk(KERN_ERR "BMAC: can't get irq %d\n", bp->tx_dma_intr); + goto err_out_irq0; + } + ret = request_irq(bp->rx_dma_intr, bmac_rxdma_intr, 0, "BMAC-rxdma", dev); + if (ret) { + printk(KERN_ERR "BMAC: can't get irq %d\n", bp->rx_dma_intr); + goto err_out_irq1; + } + + /* Mask chip interrupts and disable chip, will be + * re-enabled on open() + */ + disable_irq(dev->irq); + pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0); + + if (register_netdev(dev) != 0) { + printk(KERN_ERR "BMAC: Ethernet registration failed\n"); + goto err_out_irq2; + } + + printk(KERN_INFO "%s: BMAC%s at %pM", + dev->name, (is_bmac_plus ? "+" : ""), dev->dev_addr); + XXDEBUG((", base_addr=%#0lx", dev->base_addr)); + printk("\n"); + + return 0; + +err_out_irq2: + free_irq(bp->rx_dma_intr, dev); +err_out_irq1: + free_irq(bp->tx_dma_intr, dev); +err_out_irq0: + free_irq(dev->irq, dev); +err_out_iounmap_rx: + iounmap(bp->rx_dma); +err_out_iounmap_tx: + iounmap(bp->tx_dma); +err_out_iounmap: + iounmap((void __iomem *)dev->base_addr); +out_release: + macio_release_resources(mdev); +out_free: + pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0); + free_netdev(dev); + + return -ENODEV; +} + +static int bmac_open(struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + /* XXDEBUG(("bmac: enter open\n")); */ + /* reset the chip */ + bp->opened = 1; + bmac_reset_and_enable(dev); + enable_irq(dev->irq); + return 0; +} + +static int bmac_close(struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + volatile struct dbdma_regs __iomem *rd = bp->rx_dma; + volatile struct dbdma_regs __iomem *td = bp->tx_dma; + unsigned short config; + int i; + + bp->sleeping = 1; + + /* disable rx and tx */ + config = bmread(dev, RXCFG); + bmwrite(dev, RXCFG, (config & ~RxMACEnable)); + + config = bmread(dev, TXCFG); + bmwrite(dev, TXCFG, (config & ~TxMACEnable)); + + bmwrite(dev, INTDISABLE, DisableAll); /* disable all intrs */ + + /* disable rx and tx dma */ + rd->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */ + td->control = cpu_to_le32(DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE)); /* clear run bit */ + + /* free some skb's */ + XXDEBUG(("bmac: free rx bufs\n")); + for (i=0; i<N_RX_RING; i++) { + if (bp->rx_bufs[i] != NULL) { + dev_kfree_skb(bp->rx_bufs[i]); + bp->rx_bufs[i] = NULL; + } + } + XXDEBUG(("bmac: free tx bufs\n")); + for (i = 0; i<N_TX_RING; i++) { + if (bp->tx_bufs[i] != NULL) { + dev_kfree_skb(bp->tx_bufs[i]); + bp->tx_bufs[i] = NULL; + } + } + XXDEBUG(("bmac: all bufs freed\n")); + + bp->opened = 0; + disable_irq(dev->irq); + pmac_call_feature(PMAC_FTR_BMAC_ENABLE, macio_get_of_node(bp->mdev), 0, 0); + + return 0; +} + +static void +bmac_start(struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + int i; + struct sk_buff *skb; + unsigned long flags; + + if (bp->sleeping) + return; + + spin_lock_irqsave(&bp->lock, flags); + while (1) { + i = bp->tx_fill + 1; + if (i >= N_TX_RING) + i = 0; + if (i == bp->tx_empty) + break; + skb = skb_dequeue(bp->queue); + if (skb == NULL) + break; + bmac_transmit_packet(skb, dev); + } + spin_unlock_irqrestore(&bp->lock, flags); +} + +static netdev_tx_t +bmac_output(struct sk_buff *skb, struct net_device *dev) +{ + struct bmac_data *bp = netdev_priv(dev); + skb_queue_tail(bp->queue, skb); + bmac_start(dev); + return NETDEV_TX_OK; +} + +static void bmac_tx_timeout(struct timer_list *t) +{ + struct bmac_data *bp = from_timer(bp, t, tx_timeout); + struct net_device *dev = macio_get_drvdata(bp->mdev); + volatile struct dbdma_regs __iomem *td = bp->tx_dma; + volatile struct dbdma_regs __iomem *rd = bp->rx_dma; + volatile struct dbdma_cmd *cp; + unsigned long flags; + unsigned short config, oldConfig; + int i; + + XXDEBUG(("bmac: tx_timeout called\n")); + spin_lock_irqsave(&bp->lock, flags); + bp->timeout_active = 0; + + /* update various counters */ +/* bmac_handle_misc_intrs(bp, 0); */ + + cp = &bp->tx_cmds[bp->tx_empty]; +/* XXDEBUG((KERN_DEBUG "bmac: tx dmastat=%x %x runt=%d pr=%x fs=%x fc=%x\n", */ +/* le32_to_cpu(td->status), le16_to_cpu(cp->xfer_status), bp->tx_bad_runt, */ +/* mb->pr, mb->xmtfs, mb->fifofc)); */ + + /* turn off both tx and rx and reset the chip */ + config = bmread(dev, RXCFG); + bmwrite(dev, RXCFG, (config & ~RxMACEnable)); + config = bmread(dev, TXCFG); + bmwrite(dev, TXCFG, (config & ~TxMACEnable)); + out_le32(&td->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD)); + printk(KERN_ERR "bmac: transmit timeout - resetting\n"); + bmac_enable_and_reset_chip(dev); + + /* restart rx dma */ + cp = bus_to_virt(le32_to_cpu(rd->cmdptr)); + out_le32(&rd->control, DBDMA_CLEAR(RUN|PAUSE|FLUSH|WAKE|ACTIVE|DEAD)); + out_le16(&cp->xfer_status, 0); + out_le32(&rd->cmdptr, virt_to_bus(cp)); + out_le32(&rd->control, DBDMA_SET(RUN|WAKE)); + + /* fix up the transmit side */ + XXDEBUG((KERN_DEBUG "bmac: tx empty=%d fill=%d fullup=%d\n", + bp->tx_empty, bp->tx_fill, bp->tx_fullup)); + i = bp->tx_empty; + ++dev->stats.tx_errors; + if (i != bp->tx_fill) { + dev_kfree_skb_irq(bp->tx_bufs[i]); + bp->tx_bufs[i] = NULL; + if (++i >= N_TX_RING) i = 0; + bp->tx_empty = i; + } + bp->tx_fullup = 0; + netif_wake_queue(dev); + if (i != bp->tx_fill) { + cp = &bp->tx_cmds[i]; + out_le16(&cp->xfer_status, 0); + out_le16(&cp->command, OUTPUT_LAST); + out_le32(&td->cmdptr, virt_to_bus(cp)); + out_le32(&td->control, DBDMA_SET(RUN)); + /* bmac_set_timeout(dev); */ + XXDEBUG((KERN_DEBUG "bmac: starting %d\n", i)); + } + + /* turn it back on */ + oldConfig = bmread(dev, RXCFG); + bmwrite(dev, RXCFG, oldConfig | RxMACEnable ); + oldConfig = bmread(dev, TXCFG); + bmwrite(dev, TXCFG, oldConfig | TxMACEnable ); + + spin_unlock_irqrestore(&bp->lock, flags); +} + +#if 0 +static void dump_dbdma(volatile struct dbdma_cmd *cp,int count) +{ + int i,*ip; + + for (i=0;i< count;i++) { + ip = (int*)(cp+i); + + printk("dbdma req 0x%x addr 0x%x baddr 0x%x xfer/res 0x%x\n", + le32_to_cpup(ip+0), + le32_to_cpup(ip+1), + le32_to_cpup(ip+2), + le32_to_cpup(ip+3)); + } + +} +#endif + +#if 0 +static int +bmac_proc_info(char *buffer, char **start, off_t offset, int length) +{ + int len = 0; + off_t pos = 0; + off_t begin = 0; + int i; + + if (bmac_devs == NULL) + return -ENOSYS; + + len += sprintf(buffer, "BMAC counters & registers\n"); + + for (i = 0; i<N_REG_ENTRIES; i++) { + len += sprintf(buffer + len, "%s: %#08x\n", + reg_entries[i].name, + bmread(bmac_devs, reg_entries[i].reg_offset)); + pos = begin + len; + + if (pos < offset) { + len = 0; + begin = pos; + } + + if (pos > offset+length) break; + } + + *start = buffer + (offset - begin); + len -= (offset - begin); + + if (len > length) len = length; + + return len; +} +#endif + +static int bmac_remove(struct macio_dev *mdev) +{ + struct net_device *dev = macio_get_drvdata(mdev); + struct bmac_data *bp = netdev_priv(dev); + + unregister_netdev(dev); + + free_irq(dev->irq, dev); + free_irq(bp->tx_dma_intr, dev); + free_irq(bp->rx_dma_intr, dev); + + iounmap((void __iomem *)dev->base_addr); + iounmap(bp->tx_dma); + iounmap(bp->rx_dma); + + macio_release_resources(mdev); + + free_netdev(dev); + + return 0; +} + +static const struct of_device_id bmac_match[] = +{ + { + .name = "bmac", + .data = (void *)0, + }, + { + .type = "network", + .compatible = "bmac+", + .data = (void *)1, + }, + {}, +}; +MODULE_DEVICE_TABLE (of, bmac_match); + +static struct macio_driver bmac_driver = +{ + .driver = { + .name = "bmac", + .owner = THIS_MODULE, + .of_match_table = bmac_match, + }, + .probe = bmac_probe, + .remove = bmac_remove, +#ifdef CONFIG_PM + .suspend = bmac_suspend, + .resume = bmac_resume, +#endif +}; + + +static int __init bmac_init(void) +{ + if (bmac_emergency_rxbuf == NULL) { + bmac_emergency_rxbuf = kmalloc(RX_BUFLEN, GFP_KERNEL); + if (bmac_emergency_rxbuf == NULL) + return -ENOMEM; + } + + return macio_register_driver(&bmac_driver); +} + +static void __exit bmac_exit(void) +{ + macio_unregister_driver(&bmac_driver); + + kfree(bmac_emergency_rxbuf); + bmac_emergency_rxbuf = NULL; +} + +MODULE_AUTHOR("Randy Gobbel/Paul Mackerras"); +MODULE_DESCRIPTION("PowerMac BMAC ethernet driver."); +MODULE_LICENSE("GPL"); + +module_init(bmac_init); +module_exit(bmac_exit); diff --git a/drivers/net/ethernet/apple/bmac.h b/drivers/net/ethernet/apple/bmac.h new file mode 100644 index 000000000..f8826c4ce --- /dev/null +++ b/drivers/net/ethernet/apple/bmac.h @@ -0,0 +1,160 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * mace.h - definitions for the registers in the "Big Mac" + * Ethernet controller found in PowerMac G3 models. + * + * Copyright (C) 1998 Randy Gobbel. + */ + +/* The "Big MAC" appears to have some parts in common with the Sun "Happy Meal" + * (HME) controller. See sunhme.h + */ + + +/* register offsets */ + +/* global status and control */ +#define XIFC 0x000 /* low-level interface control */ +# define TxOutputEnable 0x0001 /* output driver enable */ +# define XIFLoopback 0x0002 /* Loopback-mode XIF enable */ +# define MIILoopback 0x0004 /* Loopback-mode MII enable */ +# define MIILoopbackBits 0x0006 +# define MIIBuffDisable 0x0008 /* MII receive buffer disable */ +# define SQETestEnable 0x0010 /* SQE test enable */ +# define SQETimeWindow 0x03e0 /* SQE time window */ +# define XIFLanceMode 0x0010 /* Lance mode enable */ +# define XIFLanceIPG0 0x03e0 /* Lance mode IPG0 */ +#define TXFIFOCSR 0x100 /* transmit FIFO control */ +# define TxFIFOEnable 0x0001 +#define TXTH 0x110 /* transmit threshold */ +# define TxThreshold 0x0004 +#define RXFIFOCSR 0x120 /* receive FIFO control */ +# define RxFIFOEnable 0x0001 +#define MEMADD 0x130 /* memory address, unknown function */ +#define MEMDATAHI 0x140 /* memory data high, presently unused in driver */ +#define MEMDATALO 0x150 /* memory data low, presently unused in driver */ +#define XCVRIF 0x160 /* transceiver interface control */ +# define COLActiveLow 0x0002 +# define SerialMode 0x0004 +# define ClkBit 0x0008 +# define LinkStatus 0x0100 +#define CHIPID 0x170 /* chip ID */ +#define MIFCSR 0x180 /* ??? */ +#define SROMCSR 0x190 /* SROM control */ +# define ChipSelect 0x0001 +# define Clk 0x0002 +#define TXPNTR 0x1a0 /* transmit pointer */ +#define RXPNTR 0x1b0 /* receive pointer */ +#define STATUS 0x200 /* status--reading this clears it */ +#define INTDISABLE 0x210 /* interrupt enable/disable control */ +/* bits below are the same in both STATUS and INTDISABLE registers */ +# define FrameReceived 0x00000001 /* Received a frame */ +# define RxFrameCntExp 0x00000002 /* Receive frame counter expired */ +# define RxAlignCntExp 0x00000004 /* Align-error counter expired */ +# define RxCRCCntExp 0x00000008 /* CRC-error counter expired */ +# define RxLenCntExp 0x00000010 /* Length-error counter expired */ +# define RxOverFlow 0x00000020 /* Receive FIFO overflow */ +# define RxCodeViolation 0x00000040 /* Code-violation counter expired */ +# define SQETestError 0x00000080 /* Test error in XIF for SQE */ +# define FrameSent 0x00000100 /* Transmitted a frame */ +# define TxUnderrun 0x00000200 /* Transmit FIFO underrun */ +# define TxMaxSizeError 0x00000400 /* Max-packet size error */ +# define TxNormalCollExp 0x00000800 /* Normal-collision counter expired */ +# define TxExcessCollExp 0x00001000 /* Excess-collision counter expired */ +# define TxLateCollExp 0x00002000 /* Late-collision counter expired */ +# define TxNetworkCollExp 0x00004000 /* First-collision counter expired */ +# define TxDeferTimerExp 0x00008000 /* Defer-timer expired */ +# define RxFIFOToHost 0x00010000 /* Data moved from FIFO to host */ +# define RxNoDescriptors 0x00020000 /* No more receive descriptors */ +# define RxDMAError 0x00040000 /* Error during receive DMA */ +# define RxDMALateErr 0x00080000 /* Receive DMA, data late */ +# define RxParityErr 0x00100000 /* Parity error during receive DMA */ +# define RxTagError 0x00200000 /* Tag error during receive DMA */ +# define TxEOPError 0x00400000 /* Tx descriptor did not have EOP set */ +# define MIFIntrEvent 0x00800000 /* MIF is signaling an interrupt */ +# define TxHostToFIFO 0x01000000 /* Data moved from host to FIFO */ +# define TxFIFOAllSent 0x02000000 /* Transmitted all packets in FIFO */ +# define TxDMAError 0x04000000 /* Error during transmit DMA */ +# define TxDMALateError 0x08000000 /* Late error during transmit DMA */ +# define TxParityError 0x10000000 /* Parity error during transmit DMA */ +# define TxTagError 0x20000000 /* Tag error during transmit DMA */ +# define PIOError 0x40000000 /* PIO access got an error */ +# define PIOParityError 0x80000000 /* PIO access got a parity error */ +# define DisableAll 0xffffffff +# define EnableAll 0x00000000 +/* # define NormalIntEvents ~(FrameReceived | FrameSent | TxUnderrun) */ +# define EnableNormal ~(FrameReceived | FrameSent) +# define EnableErrors (FrameReceived | FrameSent) +# define RxErrorMask (RxFrameCntExp | RxAlignCntExp | RxCRCCntExp | \ + RxLenCntExp | RxOverFlow | RxCodeViolation) +# define TxErrorMask (TxUnderrun | TxMaxSizeError | TxExcessCollExp | \ + TxLateCollExp | TxNetworkCollExp | TxDeferTimerExp) + +/* transmit control */ +#define TXRST 0x420 /* transmit reset */ +# define TxResetBit 0x0001 +#define TXCFG 0x430 /* transmit configuration control*/ +# define TxMACEnable 0x0001 /* output driver enable */ +# define TxSlowMode 0x0020 /* enable slow mode */ +# define TxIgnoreColl 0x0040 /* ignore transmit collisions */ +# define TxNoFCS 0x0080 /* do not emit FCS */ +# define TxNoBackoff 0x0100 /* no backoff in case of collisions */ +# define TxFullDuplex 0x0200 /* enable full-duplex */ +# define TxNeverGiveUp 0x0400 /* don't give up on transmits */ +#define IPG1 0x440 /* Inter-packet gap 1 */ +#define IPG2 0x450 /* Inter-packet gap 2 */ +#define ALIMIT 0x460 /* Transmit attempt limit */ +#define SLOT 0x470 /* Transmit slot time */ +#define PALEN 0x480 /* Size of transmit preamble */ +#define PAPAT 0x490 /* Pattern for transmit preamble */ +#define TXSFD 0x4a0 /* Transmit frame delimiter */ +#define JAM 0x4b0 /* Jam size */ +#define TXMAX 0x4c0 /* Transmit max pkt size */ +#define TXMIN 0x4d0 /* Transmit min pkt size */ +#define PAREG 0x4e0 /* Count of transmit peak attempts */ +#define DCNT 0x4f0 /* Transmit defer timer */ +#define NCCNT 0x500 /* Transmit normal-collision counter */ +#define NTCNT 0x510 /* Transmit first-collision counter */ +#define EXCNT 0x520 /* Transmit excess-collision counter */ +#define LTCNT 0x530 /* Transmit late-collision counter */ +#define RSEED 0x540 /* Transmit random number seed */ +#define TXSM 0x550 /* Transmit state machine */ + +/* receive control */ +#define RXRST 0x620 /* receive reset */ +# define RxResetValue 0x0000 +#define RXCFG 0x630 /* receive configuration control */ +# define RxMACEnable 0x0001 /* receiver overall enable */ +# define RxCFGReserved 0x0004 +# define RxPadStripEnab 0x0020 /* enable pad byte stripping */ +# define RxPromiscEnable 0x0040 /* turn on promiscuous mode */ +# define RxNoErrCheck 0x0080 /* disable receive error checking */ +# define RxCRCNoStrip 0x0100 /* disable auto-CRC-stripping */ +# define RxRejectOwnPackets 0x0200 /* don't receive our own packets */ +# define RxGrpPromisck 0x0400 /* enable group promiscuous mode */ +# define RxHashFilterEnable 0x0800 /* enable hash filter */ +# define RxAddrFilterEnable 0x1000 /* enable address filter */ +#define RXMAX 0x640 /* Max receive packet size */ +#define RXMIN 0x650 /* Min receive packet size */ +#define MADD2 0x660 /* our enet address, high part */ +#define MADD1 0x670 /* our enet address, middle part */ +#define MADD0 0x680 /* our enet address, low part */ +#define FRCNT 0x690 /* receive frame counter */ +#define LECNT 0x6a0 /* Receive excess length error counter */ +#define AECNT 0x6b0 /* Receive misaligned error counter */ +#define FECNT 0x6c0 /* Receive CRC error counter */ +#define RXSM 0x6d0 /* Receive state machine */ +#define RXCV 0x6e0 /* Receive code violation */ + +#define BHASH3 0x700 /* multicast hash register */ +#define BHASH2 0x710 /* multicast hash register */ +#define BHASH1 0x720 /* multicast hash register */ +#define BHASH0 0x730 /* multicast hash register */ + +#define AFR2 0x740 /* address filtering setup? */ +#define AFR1 0x750 /* address filtering setup? */ +#define AFR0 0x760 /* address filtering setup? */ +#define AFCR 0x770 /* address filter compare register? */ +# define EnableAllCompares 0x0fff + +/* bits in XIFC */ diff --git a/drivers/net/ethernet/apple/mace.c b/drivers/net/ethernet/apple/mace.c new file mode 100644 index 000000000..fd1b008b7 --- /dev/null +++ b/drivers/net/ethernet/apple/mace.c @@ -0,0 +1,1031 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Network device driver for the MACE ethernet controller on + * Apple Powermacs. Assumes it's under a DBDMA controller. + * + * Copyright (C) 1996 Paul Mackerras. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/timer.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/crc32.h> +#include <linux/spinlock.h> +#include <linux/bitrev.h> +#include <linux/slab.h> +#include <linux/pgtable.h> +#include <asm/dbdma.h> +#include <asm/io.h> +#include <asm/macio.h> + +#include "mace.h" + +static int port_aaui = -1; + +#define N_RX_RING 8 +#define N_TX_RING 6 +#define MAX_TX_ACTIVE 1 +#define NCMDS_TX 1 /* dma commands per element in tx ring */ +#define RX_BUFLEN (ETH_FRAME_LEN + 8) +#define TX_TIMEOUT HZ /* 1 second */ + +/* Chip rev needs workaround on HW & multicast addr change */ +#define BROKEN_ADDRCHG_REV 0x0941 + +/* Bits in transmit DMA status */ +#define TX_DMA_ERR 0x80 + +struct mace_data { + volatile struct mace __iomem *mace; + volatile struct dbdma_regs __iomem *tx_dma; + int tx_dma_intr; + volatile struct dbdma_regs __iomem *rx_dma; + int rx_dma_intr; + volatile struct dbdma_cmd *tx_cmds; /* xmit dma command list */ + volatile struct dbdma_cmd *rx_cmds; /* recv dma command list */ + struct sk_buff *rx_bufs[N_RX_RING]; + int rx_fill; + int rx_empty; + struct sk_buff *tx_bufs[N_TX_RING]; + int tx_fill; + int tx_empty; + unsigned char maccc; + unsigned char tx_fullup; + unsigned char tx_active; + unsigned char tx_bad_runt; + struct timer_list tx_timeout; + int timeout_active; + int port_aaui; + int chipid; + struct macio_dev *mdev; + spinlock_t lock; +}; + +/* + * Number of bytes of private data per MACE: allow enough for + * the rx and tx dma commands plus a branch dma command each, + * and another 16 bytes to allow us to align the dma command + * buffers on a 16 byte boundary. + */ +#define PRIV_BYTES (sizeof(struct mace_data) \ + + (N_RX_RING + NCMDS_TX * N_TX_RING + 3) * sizeof(struct dbdma_cmd)) + +static int mace_open(struct net_device *dev); +static int mace_close(struct net_device *dev); +static netdev_tx_t mace_xmit_start(struct sk_buff *skb, struct net_device *dev); +static void mace_set_multicast(struct net_device *dev); +static void mace_reset(struct net_device *dev); +static int mace_set_address(struct net_device *dev, void *addr); +static irqreturn_t mace_interrupt(int irq, void *dev_id); +static irqreturn_t mace_txdma_intr(int irq, void *dev_id); +static irqreturn_t mace_rxdma_intr(int irq, void *dev_id); +static void mace_set_timeout(struct net_device *dev); +static void mace_tx_timeout(struct timer_list *t); +static inline void dbdma_reset(volatile struct dbdma_regs __iomem *dma); +static inline void mace_clean_rings(struct mace_data *mp); +static void __mace_set_address(struct net_device *dev, const void *addr); + +/* + * If we can't get a skbuff when we need it, we use this area for DMA. + */ +static unsigned char *dummy_buf; + +static const struct net_device_ops mace_netdev_ops = { + .ndo_open = mace_open, + .ndo_stop = mace_close, + .ndo_start_xmit = mace_xmit_start, + .ndo_set_rx_mode = mace_set_multicast, + .ndo_set_mac_address = mace_set_address, + .ndo_validate_addr = eth_validate_addr, +}; + +static int mace_probe(struct macio_dev *mdev, const struct of_device_id *match) +{ + struct device_node *mace = macio_get_of_node(mdev); + struct net_device *dev; + struct mace_data *mp; + const unsigned char *addr; + u8 macaddr[ETH_ALEN]; + int j, rev, rc = -EBUSY; + + if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) { + printk(KERN_ERR "can't use MACE %pOF: need 3 addrs and 3 irqs\n", + mace); + return -ENODEV; + } + + addr = of_get_property(mace, "mac-address", NULL); + if (addr == NULL) { + addr = of_get_property(mace, "local-mac-address", NULL); + if (addr == NULL) { + printk(KERN_ERR "Can't get mac-address for MACE %pOF\n", + mace); + return -ENODEV; + } + } + + /* + * lazy allocate the driver-wide dummy buffer. (Note that we + * never have more than one MACE in the system anyway) + */ + if (dummy_buf == NULL) { + dummy_buf = kmalloc(RX_BUFLEN+2, GFP_KERNEL); + if (dummy_buf == NULL) + return -ENOMEM; + } + + if (macio_request_resources(mdev, "mace")) { + printk(KERN_ERR "MACE: can't request IO resources !\n"); + return -EBUSY; + } + + dev = alloc_etherdev(PRIV_BYTES); + if (!dev) { + rc = -ENOMEM; + goto err_release; + } + SET_NETDEV_DEV(dev, &mdev->ofdev.dev); + + mp = netdev_priv(dev); + mp->mdev = mdev; + macio_set_drvdata(mdev, dev); + + dev->base_addr = macio_resource_start(mdev, 0); + mp->mace = ioremap(dev->base_addr, 0x1000); + if (mp->mace == NULL) { + printk(KERN_ERR "MACE: can't map IO resources !\n"); + rc = -ENOMEM; + goto err_free; + } + dev->irq = macio_irq(mdev, 0); + + rev = addr[0] == 0 && addr[1] == 0xA0; + for (j = 0; j < 6; ++j) { + macaddr[j] = rev ? bitrev8(addr[j]): addr[j]; + } + eth_hw_addr_set(dev, macaddr); + mp->chipid = (in_8(&mp->mace->chipid_hi) << 8) | + in_8(&mp->mace->chipid_lo); + + + mp = netdev_priv(dev); + mp->maccc = ENXMT | ENRCV; + + mp->tx_dma = ioremap(macio_resource_start(mdev, 1), 0x1000); + if (mp->tx_dma == NULL) { + printk(KERN_ERR "MACE: can't map TX DMA resources !\n"); + rc = -ENOMEM; + goto err_unmap_io; + } + mp->tx_dma_intr = macio_irq(mdev, 1); + + mp->rx_dma = ioremap(macio_resource_start(mdev, 2), 0x1000); + if (mp->rx_dma == NULL) { + printk(KERN_ERR "MACE: can't map RX DMA resources !\n"); + rc = -ENOMEM; + goto err_unmap_tx_dma; + } + mp->rx_dma_intr = macio_irq(mdev, 2); + + mp->tx_cmds = (volatile struct dbdma_cmd *) DBDMA_ALIGN(mp + 1); + mp->rx_cmds = mp->tx_cmds + NCMDS_TX * N_TX_RING + 1; + + memset((char *) mp->tx_cmds, 0, + (NCMDS_TX*N_TX_RING + N_RX_RING + 2) * sizeof(struct dbdma_cmd)); + timer_setup(&mp->tx_timeout, mace_tx_timeout, 0); + spin_lock_init(&mp->lock); + mp->timeout_active = 0; + + if (port_aaui >= 0) + mp->port_aaui = port_aaui; + else { + /* Apple Network Server uses the AAUI port */ + if (of_machine_is_compatible("AAPL,ShinerESB")) + mp->port_aaui = 1; + else { +#ifdef CONFIG_MACE_AAUI_PORT + mp->port_aaui = 1; +#else + mp->port_aaui = 0; +#endif + } + } + + dev->netdev_ops = &mace_netdev_ops; + + /* + * Most of what is below could be moved to mace_open() + */ + mace_reset(dev); + + rc = request_irq(dev->irq, mace_interrupt, 0, "MACE", dev); + if (rc) { + printk(KERN_ERR "MACE: can't get irq %d\n", dev->irq); + goto err_unmap_rx_dma; + } + rc = request_irq(mp->tx_dma_intr, mace_txdma_intr, 0, "MACE-txdma", dev); + if (rc) { + printk(KERN_ERR "MACE: can't get irq %d\n", mp->tx_dma_intr); + goto err_free_irq; + } + rc = request_irq(mp->rx_dma_intr, mace_rxdma_intr, 0, "MACE-rxdma", dev); + if (rc) { + printk(KERN_ERR "MACE: can't get irq %d\n", mp->rx_dma_intr); + goto err_free_tx_irq; + } + + rc = register_netdev(dev); + if (rc) { + printk(KERN_ERR "MACE: Cannot register net device, aborting.\n"); + goto err_free_rx_irq; + } + + printk(KERN_INFO "%s: MACE at %pM, chip revision %d.%d\n", + dev->name, dev->dev_addr, + mp->chipid >> 8, mp->chipid & 0xff); + + return 0; + + err_free_rx_irq: + free_irq(macio_irq(mdev, 2), dev); + err_free_tx_irq: + free_irq(macio_irq(mdev, 1), dev); + err_free_irq: + free_irq(macio_irq(mdev, 0), dev); + err_unmap_rx_dma: + iounmap(mp->rx_dma); + err_unmap_tx_dma: + iounmap(mp->tx_dma); + err_unmap_io: + iounmap(mp->mace); + err_free: + free_netdev(dev); + err_release: + macio_release_resources(mdev); + + return rc; +} + +static int mace_remove(struct macio_dev *mdev) +{ + struct net_device *dev = macio_get_drvdata(mdev); + struct mace_data *mp; + + BUG_ON(dev == NULL); + + macio_set_drvdata(mdev, NULL); + + mp = netdev_priv(dev); + + unregister_netdev(dev); + + free_irq(dev->irq, dev); + free_irq(mp->tx_dma_intr, dev); + free_irq(mp->rx_dma_intr, dev); + + iounmap(mp->rx_dma); + iounmap(mp->tx_dma); + iounmap(mp->mace); + + free_netdev(dev); + + macio_release_resources(mdev); + + return 0; +} + +static void dbdma_reset(volatile struct dbdma_regs __iomem *dma) +{ + int i; + + out_le32(&dma->control, (WAKE|FLUSH|PAUSE|RUN) << 16); + + /* + * Yes this looks peculiar, but apparently it needs to be this + * way on some machines. + */ + for (i = 200; i > 0; --i) + if (le32_to_cpu(dma->control) & RUN) + udelay(1); +} + +static void mace_reset(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace __iomem *mb = mp->mace; + int i; + + /* soft-reset the chip */ + i = 200; + while (--i) { + out_8(&mb->biucc, SWRST); + if (in_8(&mb->biucc) & SWRST) { + udelay(10); + continue; + } + break; + } + if (!i) { + printk(KERN_ERR "mace: cannot reset chip!\n"); + return; + } + + out_8(&mb->imr, 0xff); /* disable all intrs for now */ + i = in_8(&mb->ir); + out_8(&mb->maccc, 0); /* turn off tx, rx */ + + out_8(&mb->biucc, XMTSP_64); + out_8(&mb->utr, RTRD); + out_8(&mb->fifocc, RCVFW_32 | XMTFW_16 | XMTFWU | RCVFWU | XMTBRST); + out_8(&mb->xmtfc, AUTO_PAD_XMIT); /* auto-pad short frames */ + out_8(&mb->rcvfc, 0); + + /* load up the hardware address */ + __mace_set_address(dev, dev->dev_addr); + + /* clear the multicast filter */ + if (mp->chipid == BROKEN_ADDRCHG_REV) + out_8(&mb->iac, LOGADDR); + else { + out_8(&mb->iac, ADDRCHG | LOGADDR); + while ((in_8(&mb->iac) & ADDRCHG) != 0) + ; + } + for (i = 0; i < 8; ++i) + out_8(&mb->ladrf, 0); + + /* done changing address */ + if (mp->chipid != BROKEN_ADDRCHG_REV) + out_8(&mb->iac, 0); + + if (mp->port_aaui) + out_8(&mb->plscc, PORTSEL_AUI + ENPLSIO); + else + out_8(&mb->plscc, PORTSEL_GPSI + ENPLSIO); +} + +static void __mace_set_address(struct net_device *dev, const void *addr) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace __iomem *mb = mp->mace; + const unsigned char *p = addr; + u8 macaddr[ETH_ALEN]; + int i; + + /* load up the hardware address */ + if (mp->chipid == BROKEN_ADDRCHG_REV) + out_8(&mb->iac, PHYADDR); + else { + out_8(&mb->iac, ADDRCHG | PHYADDR); + while ((in_8(&mb->iac) & ADDRCHG) != 0) + ; + } + for (i = 0; i < 6; ++i) + out_8(&mb->padr, macaddr[i] = p[i]); + + eth_hw_addr_set(dev, macaddr); + + if (mp->chipid != BROKEN_ADDRCHG_REV) + out_8(&mb->iac, 0); +} + +static int mace_set_address(struct net_device *dev, void *addr) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace __iomem *mb = mp->mace; + unsigned long flags; + + spin_lock_irqsave(&mp->lock, flags); + + __mace_set_address(dev, addr); + + /* note: setting ADDRCHG clears ENRCV */ + out_8(&mb->maccc, mp->maccc); + + spin_unlock_irqrestore(&mp->lock, flags); + return 0; +} + +static inline void mace_clean_rings(struct mace_data *mp) +{ + int i; + + /* free some skb's */ + for (i = 0; i < N_RX_RING; ++i) { + if (mp->rx_bufs[i] != NULL) { + dev_kfree_skb(mp->rx_bufs[i]); + mp->rx_bufs[i] = NULL; + } + } + for (i = mp->tx_empty; i != mp->tx_fill; ) { + dev_kfree_skb(mp->tx_bufs[i]); + if (++i >= N_TX_RING) + i = 0; + } +} + +static int mace_open(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace __iomem *mb = mp->mace; + volatile struct dbdma_regs __iomem *rd = mp->rx_dma; + volatile struct dbdma_regs __iomem *td = mp->tx_dma; + volatile struct dbdma_cmd *cp; + int i; + struct sk_buff *skb; + unsigned char *data; + + /* reset the chip */ + mace_reset(dev); + + /* initialize list of sk_buffs for receiving and set up recv dma */ + mace_clean_rings(mp); + memset((char *)mp->rx_cmds, 0, N_RX_RING * sizeof(struct dbdma_cmd)); + cp = mp->rx_cmds; + for (i = 0; i < N_RX_RING - 1; ++i) { + skb = netdev_alloc_skb(dev, RX_BUFLEN + 2); + if (!skb) { + data = dummy_buf; + } else { + skb_reserve(skb, 2); /* so IP header lands on 4-byte bdry */ + data = skb->data; + } + mp->rx_bufs[i] = skb; + cp->req_count = cpu_to_le16(RX_BUFLEN); + cp->command = cpu_to_le16(INPUT_LAST + INTR_ALWAYS); + cp->phy_addr = cpu_to_le32(virt_to_bus(data)); + cp->xfer_status = 0; + ++cp; + } + mp->rx_bufs[i] = NULL; + cp->command = cpu_to_le16(DBDMA_STOP); + mp->rx_fill = i; + mp->rx_empty = 0; + + /* Put a branch back to the beginning of the receive command list */ + ++cp; + cp->command = cpu_to_le16(DBDMA_NOP + BR_ALWAYS); + cp->cmd_dep = cpu_to_le32(virt_to_bus(mp->rx_cmds)); + + /* start rx dma */ + out_le32(&rd->control, (RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */ + out_le32(&rd->cmdptr, virt_to_bus(mp->rx_cmds)); + out_le32(&rd->control, (RUN << 16) | RUN); + + /* put a branch at the end of the tx command list */ + cp = mp->tx_cmds + NCMDS_TX * N_TX_RING; + cp->command = cpu_to_le16(DBDMA_NOP + BR_ALWAYS); + cp->cmd_dep = cpu_to_le32(virt_to_bus(mp->tx_cmds)); + + /* reset tx dma */ + out_le32(&td->control, (RUN|PAUSE|FLUSH|WAKE) << 16); + out_le32(&td->cmdptr, virt_to_bus(mp->tx_cmds)); + mp->tx_fill = 0; + mp->tx_empty = 0; + mp->tx_fullup = 0; + mp->tx_active = 0; + mp->tx_bad_runt = 0; + + /* turn it on! */ + out_8(&mb->maccc, mp->maccc); + /* enable all interrupts except receive interrupts */ + out_8(&mb->imr, RCVINT); + + return 0; +} + +static int mace_close(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace __iomem *mb = mp->mace; + volatile struct dbdma_regs __iomem *rd = mp->rx_dma; + volatile struct dbdma_regs __iomem *td = mp->tx_dma; + + /* disable rx and tx */ + out_8(&mb->maccc, 0); + out_8(&mb->imr, 0xff); /* disable all intrs */ + + /* disable rx and tx dma */ + rd->control = cpu_to_le32((RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */ + td->control = cpu_to_le32((RUN|PAUSE|FLUSH|WAKE) << 16); /* clear run bit */ + + mace_clean_rings(mp); + + return 0; +} + +static inline void mace_set_timeout(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + + if (mp->timeout_active) + del_timer(&mp->tx_timeout); + mp->tx_timeout.expires = jiffies + TX_TIMEOUT; + add_timer(&mp->tx_timeout); + mp->timeout_active = 1; +} + +static netdev_tx_t mace_xmit_start(struct sk_buff *skb, struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct dbdma_regs __iomem *td = mp->tx_dma; + volatile struct dbdma_cmd *cp, *np; + unsigned long flags; + int fill, next, len; + + /* see if there's a free slot in the tx ring */ + spin_lock_irqsave(&mp->lock, flags); + fill = mp->tx_fill; + next = fill + 1; + if (next >= N_TX_RING) + next = 0; + if (next == mp->tx_empty) { + netif_stop_queue(dev); + mp->tx_fullup = 1; + spin_unlock_irqrestore(&mp->lock, flags); + return NETDEV_TX_BUSY; /* can't take it at the moment */ + } + spin_unlock_irqrestore(&mp->lock, flags); + + /* partially fill in the dma command block */ + len = skb->len; + if (len > ETH_FRAME_LEN) { + printk(KERN_DEBUG "mace: xmit frame too long (%d)\n", len); + len = ETH_FRAME_LEN; + } + mp->tx_bufs[fill] = skb; + cp = mp->tx_cmds + NCMDS_TX * fill; + cp->req_count = cpu_to_le16(len); + cp->phy_addr = cpu_to_le32(virt_to_bus(skb->data)); + + np = mp->tx_cmds + NCMDS_TX * next; + out_le16(&np->command, DBDMA_STOP); + + /* poke the tx dma channel */ + spin_lock_irqsave(&mp->lock, flags); + mp->tx_fill = next; + if (!mp->tx_bad_runt && mp->tx_active < MAX_TX_ACTIVE) { + out_le16(&cp->xfer_status, 0); + out_le16(&cp->command, OUTPUT_LAST); + out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE)); + ++mp->tx_active; + mace_set_timeout(dev); + } + if (++next >= N_TX_RING) + next = 0; + if (next == mp->tx_empty) + netif_stop_queue(dev); + spin_unlock_irqrestore(&mp->lock, flags); + + return NETDEV_TX_OK; +} + +static void mace_set_multicast(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace __iomem *mb = mp->mace; + int i; + u32 crc; + unsigned long flags; + + spin_lock_irqsave(&mp->lock, flags); + mp->maccc &= ~PROM; + if (dev->flags & IFF_PROMISC) { + mp->maccc |= PROM; + } else { + unsigned char multicast_filter[8]; + struct netdev_hw_addr *ha; + + if (dev->flags & IFF_ALLMULTI) { + for (i = 0; i < 8; i++) + multicast_filter[i] = 0xff; + } else { + for (i = 0; i < 8; i++) + multicast_filter[i] = 0; + netdev_for_each_mc_addr(ha, dev) { + crc = ether_crc_le(6, ha->addr); + i = crc >> 26; /* bit number in multicast_filter */ + multicast_filter[i >> 3] |= 1 << (i & 7); + } + } +#if 0 + printk("Multicast filter :"); + for (i = 0; i < 8; i++) + printk("%02x ", multicast_filter[i]); + printk("\n"); +#endif + + if (mp->chipid == BROKEN_ADDRCHG_REV) + out_8(&mb->iac, LOGADDR); + else { + out_8(&mb->iac, ADDRCHG | LOGADDR); + while ((in_8(&mb->iac) & ADDRCHG) != 0) + ; + } + for (i = 0; i < 8; ++i) + out_8(&mb->ladrf, multicast_filter[i]); + if (mp->chipid != BROKEN_ADDRCHG_REV) + out_8(&mb->iac, 0); + } + /* reset maccc */ + out_8(&mb->maccc, mp->maccc); + spin_unlock_irqrestore(&mp->lock, flags); +} + +static void mace_handle_misc_intrs(struct mace_data *mp, int intr, struct net_device *dev) +{ + volatile struct mace __iomem *mb = mp->mace; + static int mace_babbles, mace_jabbers; + + if (intr & MPCO) + dev->stats.rx_missed_errors += 256; + dev->stats.rx_missed_errors += in_8(&mb->mpc); /* reading clears it */ + if (intr & RNTPCO) + dev->stats.rx_length_errors += 256; + dev->stats.rx_length_errors += in_8(&mb->rntpc); /* reading clears it */ + if (intr & CERR) + ++dev->stats.tx_heartbeat_errors; + if (intr & BABBLE) + if (mace_babbles++ < 4) + printk(KERN_DEBUG "mace: babbling transmitter\n"); + if (intr & JABBER) + if (mace_jabbers++ < 4) + printk(KERN_DEBUG "mace: jabbering transceiver\n"); +} + +static irqreturn_t mace_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *) dev_id; + struct mace_data *mp = netdev_priv(dev); + volatile struct mace __iomem *mb = mp->mace; + volatile struct dbdma_regs __iomem *td = mp->tx_dma; + volatile struct dbdma_cmd *cp; + int intr, fs, i, stat, x; + int xcount, dstat; + unsigned long flags; + /* static int mace_last_fs, mace_last_xcount; */ + + spin_lock_irqsave(&mp->lock, flags); + intr = in_8(&mb->ir); /* read interrupt register */ + in_8(&mb->xmtrc); /* get retries */ + mace_handle_misc_intrs(mp, intr, dev); + + i = mp->tx_empty; + while (in_8(&mb->pr) & XMTSV) { + del_timer(&mp->tx_timeout); + mp->timeout_active = 0; + /* + * Clear any interrupt indication associated with this status + * word. This appears to unlatch any error indication from + * the DMA controller. + */ + intr = in_8(&mb->ir); + if (intr != 0) + mace_handle_misc_intrs(mp, intr, dev); + if (mp->tx_bad_runt) { + fs = in_8(&mb->xmtfs); + mp->tx_bad_runt = 0; + out_8(&mb->xmtfc, AUTO_PAD_XMIT); + continue; + } + dstat = le32_to_cpu(td->status); + /* stop DMA controller */ + out_le32(&td->control, RUN << 16); + /* + * xcount is the number of complete frames which have been + * written to the fifo but for which status has not been read. + */ + xcount = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK; + if (xcount == 0 || (dstat & DEAD)) { + /* + * If a packet was aborted before the DMA controller has + * finished transferring it, it seems that there are 2 bytes + * which are stuck in some buffer somewhere. These will get + * transmitted as soon as we read the frame status (which + * reenables the transmit data transfer request). Turning + * off the DMA controller and/or resetting the MACE doesn't + * help. So we disable auto-padding and FCS transmission + * so the two bytes will only be a runt packet which should + * be ignored by other stations. + */ + out_8(&mb->xmtfc, DXMTFCS); + } + fs = in_8(&mb->xmtfs); + if ((fs & XMTSV) == 0) { + printk(KERN_ERR "mace: xmtfs not valid! (fs=%x xc=%d ds=%x)\n", + fs, xcount, dstat); + mace_reset(dev); + /* + * XXX mace likes to hang the machine after a xmtfs error. + * This is hard to reproduce, resetting *may* help + */ + } + cp = mp->tx_cmds + NCMDS_TX * i; + stat = le16_to_cpu(cp->xfer_status); + if ((fs & (UFLO|LCOL|LCAR|RTRY)) || (dstat & DEAD) || xcount == 0) { + /* + * Check whether there were in fact 2 bytes written to + * the transmit FIFO. + */ + udelay(1); + x = (in_8(&mb->fifofc) >> XMTFC_SH) & XMTFC_MASK; + if (x != 0) { + /* there were two bytes with an end-of-packet indication */ + mp->tx_bad_runt = 1; + mace_set_timeout(dev); + } else { + /* + * Either there weren't the two bytes buffered up, or they + * didn't have an end-of-packet indication. + * We flush the transmit FIFO just in case (by setting the + * XMTFWU bit with the transmitter disabled). + */ + out_8(&mb->maccc, in_8(&mb->maccc) & ~ENXMT); + out_8(&mb->fifocc, in_8(&mb->fifocc) | XMTFWU); + udelay(1); + out_8(&mb->maccc, in_8(&mb->maccc) | ENXMT); + out_8(&mb->xmtfc, AUTO_PAD_XMIT); + } + } + /* dma should have finished */ + if (i == mp->tx_fill) { + printk(KERN_DEBUG "mace: tx ring ran out? (fs=%x xc=%d ds=%x)\n", + fs, xcount, dstat); + continue; + } + /* Update stats */ + if (fs & (UFLO|LCOL|LCAR|RTRY)) { + ++dev->stats.tx_errors; + if (fs & LCAR) + ++dev->stats.tx_carrier_errors; + if (fs & (UFLO|LCOL|RTRY)) + ++dev->stats.tx_aborted_errors; + } else { + dev->stats.tx_bytes += mp->tx_bufs[i]->len; + ++dev->stats.tx_packets; + } + dev_consume_skb_irq(mp->tx_bufs[i]); + --mp->tx_active; + if (++i >= N_TX_RING) + i = 0; +#if 0 + mace_last_fs = fs; + mace_last_xcount = xcount; +#endif + } + + if (i != mp->tx_empty) { + mp->tx_fullup = 0; + netif_wake_queue(dev); + } + mp->tx_empty = i; + i += mp->tx_active; + if (i >= N_TX_RING) + i -= N_TX_RING; + if (!mp->tx_bad_runt && i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE) { + do { + /* set up the next one */ + cp = mp->tx_cmds + NCMDS_TX * i; + out_le16(&cp->xfer_status, 0); + out_le16(&cp->command, OUTPUT_LAST); + ++mp->tx_active; + if (++i >= N_TX_RING) + i = 0; + } while (i != mp->tx_fill && mp->tx_active < MAX_TX_ACTIVE); + out_le32(&td->control, ((RUN|WAKE) << 16) + (RUN|WAKE)); + mace_set_timeout(dev); + } + spin_unlock_irqrestore(&mp->lock, flags); + return IRQ_HANDLED; +} + +static void mace_tx_timeout(struct timer_list *t) +{ + struct mace_data *mp = from_timer(mp, t, tx_timeout); + struct net_device *dev = macio_get_drvdata(mp->mdev); + volatile struct mace __iomem *mb = mp->mace; + volatile struct dbdma_regs __iomem *td = mp->tx_dma; + volatile struct dbdma_regs __iomem *rd = mp->rx_dma; + volatile struct dbdma_cmd *cp; + unsigned long flags; + int i; + + spin_lock_irqsave(&mp->lock, flags); + mp->timeout_active = 0; + if (mp->tx_active == 0 && !mp->tx_bad_runt) + goto out; + + /* update various counters */ + mace_handle_misc_intrs(mp, in_8(&mb->ir), dev); + + cp = mp->tx_cmds + NCMDS_TX * mp->tx_empty; + + /* turn off both tx and rx and reset the chip */ + out_8(&mb->maccc, 0); + printk(KERN_ERR "mace: transmit timeout - resetting\n"); + dbdma_reset(td); + mace_reset(dev); + + /* restart rx dma */ + cp = bus_to_virt(le32_to_cpu(rd->cmdptr)); + dbdma_reset(rd); + out_le16(&cp->xfer_status, 0); + out_le32(&rd->cmdptr, virt_to_bus(cp)); + out_le32(&rd->control, (RUN << 16) | RUN); + + /* fix up the transmit side */ + i = mp->tx_empty; + mp->tx_active = 0; + ++dev->stats.tx_errors; + if (mp->tx_bad_runt) { + mp->tx_bad_runt = 0; + } else if (i != mp->tx_fill) { + dev_kfree_skb_irq(mp->tx_bufs[i]); + if (++i >= N_TX_RING) + i = 0; + mp->tx_empty = i; + } + mp->tx_fullup = 0; + netif_wake_queue(dev); + if (i != mp->tx_fill) { + cp = mp->tx_cmds + NCMDS_TX * i; + out_le16(&cp->xfer_status, 0); + out_le16(&cp->command, OUTPUT_LAST); + out_le32(&td->cmdptr, virt_to_bus(cp)); + out_le32(&td->control, (RUN << 16) | RUN); + ++mp->tx_active; + mace_set_timeout(dev); + } + + /* turn it back on */ + out_8(&mb->imr, RCVINT); + out_8(&mb->maccc, mp->maccc); + +out: + spin_unlock_irqrestore(&mp->lock, flags); +} + +static irqreturn_t mace_txdma_intr(int irq, void *dev_id) +{ + return IRQ_HANDLED; +} + +static irqreturn_t mace_rxdma_intr(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *) dev_id; + struct mace_data *mp = netdev_priv(dev); + volatile struct dbdma_regs __iomem *rd = mp->rx_dma; + volatile struct dbdma_cmd *cp, *np; + int i, nb, stat, next; + struct sk_buff *skb; + unsigned frame_status; + static int mace_lost_status; + unsigned char *data; + unsigned long flags; + + spin_lock_irqsave(&mp->lock, flags); + for (i = mp->rx_empty; i != mp->rx_fill; ) { + cp = mp->rx_cmds + i; + stat = le16_to_cpu(cp->xfer_status); + if ((stat & ACTIVE) == 0) { + next = i + 1; + if (next >= N_RX_RING) + next = 0; + np = mp->rx_cmds + next; + if (next != mp->rx_fill && + (le16_to_cpu(np->xfer_status) & ACTIVE) != 0) { + printk(KERN_DEBUG "mace: lost a status word\n"); + ++mace_lost_status; + } else + break; + } + nb = le16_to_cpu(cp->req_count) - le16_to_cpu(cp->res_count); + out_le16(&cp->command, DBDMA_STOP); + /* got a packet, have a look at it */ + skb = mp->rx_bufs[i]; + if (!skb) { + ++dev->stats.rx_dropped; + } else if (nb > 8) { + data = skb->data; + frame_status = (data[nb-3] << 8) + data[nb-4]; + if (frame_status & (RS_OFLO|RS_CLSN|RS_FRAMERR|RS_FCSERR)) { + ++dev->stats.rx_errors; + if (frame_status & RS_OFLO) + ++dev->stats.rx_over_errors; + if (frame_status & RS_FRAMERR) + ++dev->stats.rx_frame_errors; + if (frame_status & RS_FCSERR) + ++dev->stats.rx_crc_errors; + } else { + /* Mace feature AUTO_STRIP_RCV is on by default, dropping the + * FCS on frames with 802.3 headers. This means that Ethernet + * frames have 8 extra octets at the end, while 802.3 frames + * have only 4. We need to correctly account for this. */ + if (*(unsigned short *)(data+12) < 1536) /* 802.3 header */ + nb -= 4; + else /* Ethernet header; mace includes FCS */ + nb -= 8; + skb_put(skb, nb); + skb->protocol = eth_type_trans(skb, dev); + dev->stats.rx_bytes += skb->len; + netif_rx(skb); + mp->rx_bufs[i] = NULL; + ++dev->stats.rx_packets; + } + } else { + ++dev->stats.rx_errors; + ++dev->stats.rx_length_errors; + } + + /* advance to next */ + if (++i >= N_RX_RING) + i = 0; + } + mp->rx_empty = i; + + i = mp->rx_fill; + for (;;) { + next = i + 1; + if (next >= N_RX_RING) + next = 0; + if (next == mp->rx_empty) + break; + cp = mp->rx_cmds + i; + skb = mp->rx_bufs[i]; + if (!skb) { + skb = netdev_alloc_skb(dev, RX_BUFLEN + 2); + if (skb) { + skb_reserve(skb, 2); + mp->rx_bufs[i] = skb; + } + } + cp->req_count = cpu_to_le16(RX_BUFLEN); + data = skb? skb->data: dummy_buf; + cp->phy_addr = cpu_to_le32(virt_to_bus(data)); + out_le16(&cp->xfer_status, 0); + out_le16(&cp->command, INPUT_LAST + INTR_ALWAYS); +#if 0 + if ((le32_to_cpu(rd->status) & ACTIVE) != 0) { + out_le32(&rd->control, (PAUSE << 16) | PAUSE); + while ((in_le32(&rd->status) & ACTIVE) != 0) + ; + } +#endif + i = next; + } + if (i != mp->rx_fill) { + out_le32(&rd->control, ((RUN|WAKE) << 16) | (RUN|WAKE)); + mp->rx_fill = i; + } + spin_unlock_irqrestore(&mp->lock, flags); + return IRQ_HANDLED; +} + +static const struct of_device_id mace_match[] = +{ + { + .name = "mace", + }, + {}, +}; +MODULE_DEVICE_TABLE (of, mace_match); + +static struct macio_driver mace_driver = +{ + .driver = { + .name = "mace", + .owner = THIS_MODULE, + .of_match_table = mace_match, + }, + .probe = mace_probe, + .remove = mace_remove, +}; + + +static int __init mace_init(void) +{ + return macio_register_driver(&mace_driver); +} + +static void __exit mace_cleanup(void) +{ + macio_unregister_driver(&mace_driver); + + kfree(dummy_buf); + dummy_buf = NULL; +} + +MODULE_AUTHOR("Paul Mackerras"); +MODULE_DESCRIPTION("PowerMac MACE driver."); +module_param(port_aaui, int, 0); +MODULE_PARM_DESC(port_aaui, "MACE uses AAUI port (0-1)"); +MODULE_LICENSE("GPL"); + +module_init(mace_init); +module_exit(mace_cleanup); diff --git a/drivers/net/ethernet/apple/mace.h b/drivers/net/ethernet/apple/mace.h new file mode 100644 index 000000000..697f71cf1 --- /dev/null +++ b/drivers/net/ethernet/apple/mace.h @@ -0,0 +1,169 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * mace.h - definitions for the registers in the Am79C940 MACE + * (Medium Access Control for Ethernet) controller. + * + * Copyright (C) 1996 Paul Mackerras. + */ + +#define REG(x) volatile unsigned char x; char x ## _pad[15] + +struct mace { + REG(rcvfifo); /* receive FIFO */ + REG(xmtfifo); /* transmit FIFO */ + REG(xmtfc); /* transmit frame control */ + REG(xmtfs); /* transmit frame status */ + REG(xmtrc); /* transmit retry count */ + REG(rcvfc); /* receive frame control */ + REG(rcvfs); /* receive frame status (4 bytes) */ + REG(fifofc); /* FIFO frame count */ + REG(ir); /* interrupt register */ + REG(imr); /* interrupt mask register */ + REG(pr); /* poll register */ + REG(biucc); /* bus interface unit config control */ + REG(fifocc); /* FIFO configuration control */ + REG(maccc); /* medium access control config control */ + REG(plscc); /* phys layer signalling config control */ + REG(phycc); /* physical configuration control */ + REG(chipid_lo); /* chip ID, lsb */ + REG(chipid_hi); /* chip ID, msb */ + REG(iac); /* internal address config */ + REG(reg19); + REG(ladrf); /* logical address filter (8 bytes) */ + REG(padr); /* physical address (6 bytes) */ + REG(reg22); + REG(reg23); + REG(mpc); /* missed packet count (clears when read) */ + REG(reg25); + REG(rntpc); /* runt packet count (clears when read) */ + REG(rcvcc); /* recv collision count (clears when read) */ + REG(reg28); + REG(utr); /* user test reg */ + REG(reg30); + REG(reg31); +}; + +/* Bits in XMTFC */ +#define DRTRY 0x80 /* don't retry transmission after collision */ +#define DXMTFCS 0x08 /* don't append FCS to transmitted frame */ +#define AUTO_PAD_XMIT 0x01 /* auto-pad short packets on transmission */ + +/* Bits in XMTFS: only valid when XMTSV is set in PR and XMTFS */ +#define XMTSV 0x80 /* transmit status (i.e. XMTFS) valid */ +#define UFLO 0x40 /* underflow - xmit fifo ran dry */ +#define LCOL 0x20 /* late collision (transmission aborted) */ +#define MORE 0x10 /* 2 or more retries needed to xmit frame */ +#define ONE 0x08 /* 1 retry needed to xmit frame */ +#define DEFER 0x04 /* MACE had to defer xmission (enet busy) */ +#define LCAR 0x02 /* loss of carrier (transmission aborted) */ +#define RTRY 0x01 /* too many retries (transmission aborted) */ + +/* Bits in XMTRC: only valid when XMTSV is set in PR (and XMTFS) */ +#define EXDEF 0x80 /* had to defer for excessive time */ +#define RETRY_MASK 0x0f /* number of retries (0 - 15) */ + +/* Bits in RCVFC */ +#define LLRCV 0x08 /* low latency receive: early DMA request */ +#define M_RBAR 0x04 /* sets function of EAM/R pin */ +#define AUTO_STRIP_RCV 0x01 /* auto-strip short LLC frames on recv */ + +/* + * Bits in RCVFS. After a frame is received, four bytes of status + * are automatically read from this register and appended to the frame + * data in memory. These are: + * Byte 0 and 1: message byte count and frame status + * Byte 2: runt packet count + * Byte 3: receive collision count + */ +#define RS_OFLO 0x8000 /* receive FIFO overflowed */ +#define RS_CLSN 0x4000 /* received frame suffered (late) collision */ +#define RS_FRAMERR 0x2000 /* framing error flag */ +#define RS_FCSERR 0x1000 /* frame had FCS error */ +#define RS_COUNT 0x0fff /* mask for byte count field */ + +/* Bits (fields) in FIFOFC */ +#define RCVFC_SH 4 /* receive frame count in FIFO */ +#define RCVFC_MASK 0x0f +#define XMTFC_SH 0 /* transmit frame count in FIFO */ +#define XMTFC_MASK 0x0f + +/* + * Bits in IR and IMR. The IR clears itself when read. + * Setting a bit in the IMR will disable the corresponding interrupt. + */ +#define JABBER 0x80 /* jabber error - 10baseT xmission too long */ +#define BABBLE 0x40 /* babble - xmitter xmitting for too long */ +#define CERR 0x20 /* collision err - no SQE test (heartbeat) */ +#define RCVCCO 0x10 /* RCVCC overflow */ +#define RNTPCO 0x08 /* RNTPC overflow */ +#define MPCO 0x04 /* MPC overflow */ +#define RCVINT 0x02 /* receive interrupt */ +#define XMTINT 0x01 /* transmitter interrupt */ + +/* Bits in PR */ +#define XMTSV 0x80 /* XMTFS valid (same as in XMTFS) */ +#define TDTREQ 0x40 /* set when xmit fifo is requesting data */ +#define RDTREQ 0x20 /* set when recv fifo requests data xfer */ + +/* Bits in BIUCC */ +#define BSWP 0x40 /* byte swap, i.e. big-endian bus */ +#define XMTSP_4 0x00 /* start xmitting when 4 bytes in FIFO */ +#define XMTSP_16 0x10 /* start xmitting when 16 bytes in FIFO */ +#define XMTSP_64 0x20 /* start xmitting when 64 bytes in FIFO */ +#define XMTSP_112 0x30 /* start xmitting when 112 bytes in FIFO */ +#define SWRST 0x01 /* software reset */ + +/* Bits in FIFOCC */ +#define XMTFW_8 0x00 /* xmit fifo watermark = 8 words free */ +#define XMTFW_16 0x40 /* 16 words free */ +#define XMTFW_32 0x80 /* 32 words free */ +#define RCVFW_16 0x00 /* recv fifo watermark = 16 bytes avail */ +#define RCVFW_32 0x10 /* 32 bytes avail */ +#define RCVFW_64 0x20 /* 64 bytes avail */ +#define XMTFWU 0x08 /* xmit fifo watermark update enable */ +#define RCVFWU 0x04 /* recv fifo watermark update enable */ +#define XMTBRST 0x02 /* enable transmit burst mode */ +#define RCVBRST 0x01 /* enable receive burst mode */ + +/* Bits in MACCC */ +#define PROM 0x80 /* promiscuous mode */ +#define DXMT2PD 0x40 /* disable xmit two-part deferral algorithm */ +#define EMBA 0x20 /* enable modified backoff algorithm */ +#define DRCVPA 0x08 /* disable receiving physical address */ +#define DRCVBC 0x04 /* disable receiving broadcasts */ +#define ENXMT 0x02 /* enable transmitter */ +#define ENRCV 0x01 /* enable receiver */ + +/* Bits in PLSCC */ +#define XMTSEL 0x08 /* select DO+/DO- state when idle */ +#define PORTSEL_AUI 0x00 /* select AUI port */ +#define PORTSEL_10T 0x02 /* select 10Base-T port */ +#define PORTSEL_DAI 0x04 /* select DAI port */ +#define PORTSEL_GPSI 0x06 /* select GPSI port */ +#define ENPLSIO 0x01 /* enable optional PLS I/O pins */ + +/* Bits in PHYCC */ +#define LNKFL 0x80 /* reports 10Base-T link failure */ +#define DLNKTST 0x40 /* disable 10Base-T link test */ +#define REVPOL 0x20 /* 10Base-T receiver polarity reversed */ +#define DAPC 0x10 /* disable auto receiver polarity correction */ +#define LRT 0x08 /* low receive threshold for long links */ +#define ASEL 0x04 /* auto-select AUI or 10Base-T port */ +#define RWAKE 0x02 /* remote wake function */ +#define AWAKE 0x01 /* auto wake function */ + +/* Bits in IAC */ +#define ADDRCHG 0x80 /* request address change */ +#define PHYADDR 0x04 /* access physical address */ +#define LOGADDR 0x02 /* access multicast filter */ + +/* Bits in UTR */ +#define RTRE 0x80 /* reserved test register enable. DON'T SET. */ +#define RTRD 0x40 /* reserved test register disable. Sticky */ +#define RPAC 0x20 /* accept runt packets */ +#define FCOLL 0x10 /* force collision */ +#define RCVFCSE 0x08 /* receive FCS enable */ +#define LOOP_NONE 0x00 /* no loopback */ +#define LOOP_EXT 0x02 /* external loopback */ +#define LOOP_INT 0x04 /* internal loopback, excludes MENDEC */ +#define LOOP_MENDEC 0x06 /* internal loopback, includes MENDEC */ diff --git a/drivers/net/ethernet/apple/macmace.c b/drivers/net/ethernet/apple/macmace.c new file mode 100644 index 000000000..8fcaf1639 --- /dev/null +++ b/drivers/net/ethernet/apple/macmace.c @@ -0,0 +1,770 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Driver for the Macintosh 68K onboard MACE controller with PSC + * driven DMA. The MACE driver code is derived from mace.c. The + * Mac68k theory of operation is courtesy of the MacBSD wizards. + * + * Copyright (C) 1996 Paul Mackerras. + * Copyright (C) 1998 Alan Cox <alan@lxorguk.ukuu.org.uk> + * + * Modified heavily by Joshua M. Thompson based on Dave Huang's NetBSD driver + * + * Copyright (C) 2007 Finn Thain + * + * Converted to DMA API, converted to unified driver model, + * sync'd some routines with mace.c and fixed various bugs. + */ + + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/crc32.h> +#include <linux/bitrev.h> +#include <linux/dma-mapping.h> +#include <linux/platform_device.h> +#include <linux/gfp.h> +#include <linux/interrupt.h> +#include <asm/io.h> +#include <asm/macints.h> +#include <asm/mac_psc.h> +#include <asm/page.h> +#include "mace.h" + +static char mac_mace_string[] = "macmace"; + +#define N_TX_BUFF_ORDER 0 +#define N_TX_RING (1 << N_TX_BUFF_ORDER) +#define N_RX_BUFF_ORDER 3 +#define N_RX_RING (1 << N_RX_BUFF_ORDER) + +#define TX_TIMEOUT HZ + +#define MACE_BUFF_SIZE 0x800 + +/* Chip rev needs workaround on HW & multicast addr change */ +#define BROKEN_ADDRCHG_REV 0x0941 + +/* The MACE is simply wired down on a Mac68K box */ + +#define MACE_BASE (void *)(0x50F1C000) +#define MACE_PROM (void *)(0x50F08001) + +struct mace_data { + volatile struct mace *mace; + unsigned char *tx_ring; + dma_addr_t tx_ring_phys; + unsigned char *rx_ring; + dma_addr_t rx_ring_phys; + int dma_intr; + int rx_slot, rx_tail; + int tx_slot, tx_sloti, tx_count; + int chipid; + struct device *device; +}; + +struct mace_frame { + u8 rcvcnt; + u8 pad1; + u8 rcvsts; + u8 pad2; + u8 rntpc; + u8 pad3; + u8 rcvcc; + u8 pad4; + u32 pad5; + u32 pad6; + u8 data[1]; + /* And frame continues.. */ +}; + +#define PRIV_BYTES sizeof(struct mace_data) + +static int mace_open(struct net_device *dev); +static int mace_close(struct net_device *dev); +static netdev_tx_t mace_xmit_start(struct sk_buff *skb, struct net_device *dev); +static void mace_set_multicast(struct net_device *dev); +static int mace_set_address(struct net_device *dev, void *addr); +static void mace_reset(struct net_device *dev); +static irqreturn_t mace_interrupt(int irq, void *dev_id); +static irqreturn_t mace_dma_intr(int irq, void *dev_id); +static void mace_tx_timeout(struct net_device *dev, unsigned int txqueue); +static void __mace_set_address(struct net_device *dev, const void *addr); + +/* + * Load a receive DMA channel with a base address and ring length + */ + +static void mace_load_rxdma_base(struct net_device *dev, int set) +{ + struct mace_data *mp = netdev_priv(dev); + + psc_write_word(PSC_ENETRD_CMD + set, 0x0100); + psc_write_long(PSC_ENETRD_ADDR + set, (u32) mp->rx_ring_phys); + psc_write_long(PSC_ENETRD_LEN + set, N_RX_RING); + psc_write_word(PSC_ENETRD_CMD + set, 0x9800); + mp->rx_tail = 0; +} + +/* + * Reset the receive DMA subsystem + */ + +static void mace_rxdma_reset(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mace = mp->mace; + u8 maccc = mace->maccc; + + mace->maccc = maccc & ~ENRCV; + + psc_write_word(PSC_ENETRD_CTL, 0x8800); + mace_load_rxdma_base(dev, 0x00); + psc_write_word(PSC_ENETRD_CTL, 0x0400); + + psc_write_word(PSC_ENETRD_CTL, 0x8800); + mace_load_rxdma_base(dev, 0x10); + psc_write_word(PSC_ENETRD_CTL, 0x0400); + + mace->maccc = maccc; + mp->rx_slot = 0; + + psc_write_word(PSC_ENETRD_CMD + PSC_SET0, 0x9800); + psc_write_word(PSC_ENETRD_CMD + PSC_SET1, 0x9800); +} + +/* + * Reset the transmit DMA subsystem + */ + +static void mace_txdma_reset(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mace = mp->mace; + u8 maccc; + + psc_write_word(PSC_ENETWR_CTL, 0x8800); + + maccc = mace->maccc; + mace->maccc = maccc & ~ENXMT; + + mp->tx_slot = mp->tx_sloti = 0; + mp->tx_count = N_TX_RING; + + psc_write_word(PSC_ENETWR_CTL, 0x0400); + mace->maccc = maccc; +} + +/* + * Disable DMA + */ + +static void mace_dma_off(struct net_device *dev) +{ + psc_write_word(PSC_ENETRD_CTL, 0x8800); + psc_write_word(PSC_ENETRD_CTL, 0x1000); + psc_write_word(PSC_ENETRD_CMD + PSC_SET0, 0x1100); + psc_write_word(PSC_ENETRD_CMD + PSC_SET1, 0x1100); + + psc_write_word(PSC_ENETWR_CTL, 0x8800); + psc_write_word(PSC_ENETWR_CTL, 0x1000); + psc_write_word(PSC_ENETWR_CMD + PSC_SET0, 0x1100); + psc_write_word(PSC_ENETWR_CMD + PSC_SET1, 0x1100); +} + +static const struct net_device_ops mace_netdev_ops = { + .ndo_open = mace_open, + .ndo_stop = mace_close, + .ndo_start_xmit = mace_xmit_start, + .ndo_tx_timeout = mace_tx_timeout, + .ndo_set_rx_mode = mace_set_multicast, + .ndo_set_mac_address = mace_set_address, + .ndo_validate_addr = eth_validate_addr, +}; + +/* + * Not really much of a probe. The hardware table tells us if this + * model of Macintrash has a MACE (AV macintoshes) + */ + +static int mace_probe(struct platform_device *pdev) +{ + int j; + struct mace_data *mp; + unsigned char *addr; + struct net_device *dev; + unsigned char checksum = 0; + u8 macaddr[ETH_ALEN]; + int err; + + dev = alloc_etherdev(PRIV_BYTES); + if (!dev) + return -ENOMEM; + + mp = netdev_priv(dev); + + mp->device = &pdev->dev; + platform_set_drvdata(pdev, dev); + SET_NETDEV_DEV(dev, &pdev->dev); + + dev->base_addr = (u32)MACE_BASE; + mp->mace = MACE_BASE; + + dev->irq = IRQ_MAC_MACE; + mp->dma_intr = IRQ_MAC_MACE_DMA; + + mp->chipid = mp->mace->chipid_hi << 8 | mp->mace->chipid_lo; + + /* + * The PROM contains 8 bytes which total 0xFF when XOR'd + * together. Due to the usual peculiar apple brain damage + * the bytes are spaced out in a strange boundary and the + * bits are reversed. + */ + + addr = MACE_PROM; + + for (j = 0; j < 6; ++j) { + u8 v = bitrev8(addr[j<<4]); + checksum ^= v; + macaddr[j] = v; + } + eth_hw_addr_set(dev, macaddr); + for (; j < 8; ++j) { + checksum ^= bitrev8(addr[j<<4]); + } + + if (checksum != 0xFF) { + free_netdev(dev); + return -ENODEV; + } + + dev->netdev_ops = &mace_netdev_ops; + dev->watchdog_timeo = TX_TIMEOUT; + + pr_info("Onboard MACE, hardware address %pM, chip revision 0x%04X\n", + dev->dev_addr, mp->chipid); + + err = register_netdev(dev); + if (!err) + return 0; + + free_netdev(dev); + return err; +} + +/* + * Reset the chip. + */ + +static void mace_reset(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mb = mp->mace; + int i; + + /* soft-reset the chip */ + i = 200; + while (--i) { + mb->biucc = SWRST; + if (mb->biucc & SWRST) { + udelay(10); + continue; + } + break; + } + if (!i) { + printk(KERN_ERR "macmace: cannot reset chip!\n"); + return; + } + + mb->maccc = 0; /* turn off tx, rx */ + mb->imr = 0xFF; /* disable all intrs for now */ + i = mb->ir; + + mb->biucc = XMTSP_64; + mb->utr = RTRD; + mb->fifocc = XMTFW_8 | RCVFW_64 | XMTFWU | RCVFWU; + + mb->xmtfc = AUTO_PAD_XMIT; /* auto-pad short frames */ + mb->rcvfc = 0; + + /* load up the hardware address */ + __mace_set_address(dev, dev->dev_addr); + + /* clear the multicast filter */ + if (mp->chipid == BROKEN_ADDRCHG_REV) + mb->iac = LOGADDR; + else { + mb->iac = ADDRCHG | LOGADDR; + while ((mb->iac & ADDRCHG) != 0) + ; + } + for (i = 0; i < 8; ++i) + mb->ladrf = 0; + + /* done changing address */ + if (mp->chipid != BROKEN_ADDRCHG_REV) + mb->iac = 0; + + mb->plscc = PORTSEL_AUI; +} + +/* + * Load the address on a mace controller. + */ + +static void __mace_set_address(struct net_device *dev, const void *addr) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mb = mp->mace; + const unsigned char *p = addr; + u8 macaddr[ETH_ALEN]; + int i; + + /* load up the hardware address */ + if (mp->chipid == BROKEN_ADDRCHG_REV) + mb->iac = PHYADDR; + else { + mb->iac = ADDRCHG | PHYADDR; + while ((mb->iac & ADDRCHG) != 0) + ; + } + for (i = 0; i < 6; ++i) + mb->padr = macaddr[i] = p[i]; + eth_hw_addr_set(dev, macaddr); + if (mp->chipid != BROKEN_ADDRCHG_REV) + mb->iac = 0; +} + +static int mace_set_address(struct net_device *dev, void *addr) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mb = mp->mace; + unsigned long flags; + u8 maccc; + + local_irq_save(flags); + + maccc = mb->maccc; + + __mace_set_address(dev, addr); + + mb->maccc = maccc; + + local_irq_restore(flags); + + return 0; +} + +/* + * Open the Macintosh MACE. Most of this is playing with the DMA + * engine. The ethernet chip is quite friendly. + */ + +static int mace_open(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mb = mp->mace; + + /* reset the chip */ + mace_reset(dev); + + if (request_irq(dev->irq, mace_interrupt, 0, dev->name, dev)) { + printk(KERN_ERR "%s: can't get irq %d\n", dev->name, dev->irq); + return -EAGAIN; + } + if (request_irq(mp->dma_intr, mace_dma_intr, 0, dev->name, dev)) { + printk(KERN_ERR "%s: can't get irq %d\n", dev->name, mp->dma_intr); + free_irq(dev->irq, dev); + return -EAGAIN; + } + + /* Allocate the DMA ring buffers */ + + mp->tx_ring = dma_alloc_coherent(mp->device, + N_TX_RING * MACE_BUFF_SIZE, + &mp->tx_ring_phys, GFP_KERNEL); + if (mp->tx_ring == NULL) + goto out1; + + mp->rx_ring = dma_alloc_coherent(mp->device, + N_RX_RING * MACE_BUFF_SIZE, + &mp->rx_ring_phys, GFP_KERNEL); + if (mp->rx_ring == NULL) + goto out2; + + mace_dma_off(dev); + + /* Not sure what these do */ + + psc_write_word(PSC_ENETWR_CTL, 0x9000); + psc_write_word(PSC_ENETRD_CTL, 0x9000); + psc_write_word(PSC_ENETWR_CTL, 0x0400); + psc_write_word(PSC_ENETRD_CTL, 0x0400); + + mace_rxdma_reset(dev); + mace_txdma_reset(dev); + + /* turn it on! */ + mb->maccc = ENXMT | ENRCV; + /* enable all interrupts except receive interrupts */ + mb->imr = RCVINT; + return 0; + +out2: + dma_free_coherent(mp->device, N_TX_RING * MACE_BUFF_SIZE, + mp->tx_ring, mp->tx_ring_phys); +out1: + free_irq(dev->irq, dev); + free_irq(mp->dma_intr, dev); + return -ENOMEM; +} + +/* + * Shut down the mace and its interrupt channel + */ + +static int mace_close(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mb = mp->mace; + + mb->maccc = 0; /* disable rx and tx */ + mb->imr = 0xFF; /* disable all irqs */ + mace_dma_off(dev); /* disable rx and tx dma */ + + return 0; +} + +/* + * Transmit a frame + */ + +static netdev_tx_t mace_xmit_start(struct sk_buff *skb, struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + unsigned long flags; + + /* Stop the queue since there's only the one buffer */ + + local_irq_save(flags); + netif_stop_queue(dev); + if (!mp->tx_count) { + printk(KERN_ERR "macmace: tx queue running but no free buffers.\n"); + local_irq_restore(flags); + return NETDEV_TX_BUSY; + } + mp->tx_count--; + local_irq_restore(flags); + + dev->stats.tx_packets++; + dev->stats.tx_bytes += skb->len; + + /* We need to copy into our xmit buffer to take care of alignment and caching issues */ + skb_copy_from_linear_data(skb, mp->tx_ring, skb->len); + + /* load the Tx DMA and fire it off */ + + psc_write_long(PSC_ENETWR_ADDR + mp->tx_slot, (u32) mp->tx_ring_phys); + psc_write_long(PSC_ENETWR_LEN + mp->tx_slot, skb->len); + psc_write_word(PSC_ENETWR_CMD + mp->tx_slot, 0x9800); + + mp->tx_slot ^= 0x10; + + dev_kfree_skb(skb); + + return NETDEV_TX_OK; +} + +static void mace_set_multicast(struct net_device *dev) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mb = mp->mace; + int i; + u32 crc; + u8 maccc; + unsigned long flags; + + local_irq_save(flags); + maccc = mb->maccc; + mb->maccc &= ~PROM; + + if (dev->flags & IFF_PROMISC) { + mb->maccc |= PROM; + } else { + unsigned char multicast_filter[8]; + struct netdev_hw_addr *ha; + + if (dev->flags & IFF_ALLMULTI) { + for (i = 0; i < 8; i++) { + multicast_filter[i] = 0xFF; + } + } else { + for (i = 0; i < 8; i++) + multicast_filter[i] = 0; + netdev_for_each_mc_addr(ha, dev) { + crc = ether_crc_le(6, ha->addr); + /* bit number in multicast_filter */ + i = crc >> 26; + multicast_filter[i >> 3] |= 1 << (i & 7); + } + } + + if (mp->chipid == BROKEN_ADDRCHG_REV) + mb->iac = LOGADDR; + else { + mb->iac = ADDRCHG | LOGADDR; + while ((mb->iac & ADDRCHG) != 0) + ; + } + for (i = 0; i < 8; ++i) + mb->ladrf = multicast_filter[i]; + if (mp->chipid != BROKEN_ADDRCHG_REV) + mb->iac = 0; + } + + mb->maccc = maccc; + local_irq_restore(flags); +} + +static void mace_handle_misc_intrs(struct net_device *dev, int intr) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mb = mp->mace; + static int mace_babbles, mace_jabbers; + + if (intr & MPCO) + dev->stats.rx_missed_errors += 256; + dev->stats.rx_missed_errors += mb->mpc; /* reading clears it */ + if (intr & RNTPCO) + dev->stats.rx_length_errors += 256; + dev->stats.rx_length_errors += mb->rntpc; /* reading clears it */ + if (intr & CERR) + ++dev->stats.tx_heartbeat_errors; + if (intr & BABBLE) + if (mace_babbles++ < 4) + printk(KERN_DEBUG "macmace: babbling transmitter\n"); + if (intr & JABBER) + if (mace_jabbers++ < 4) + printk(KERN_DEBUG "macmace: jabbering transceiver\n"); +} + +static irqreturn_t mace_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *) dev_id; + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mb = mp->mace; + int intr, fs; + unsigned long flags; + + /* don't want the dma interrupt handler to fire */ + local_irq_save(flags); + + intr = mb->ir; /* read interrupt register */ + mace_handle_misc_intrs(dev, intr); + + if (intr & XMTINT) { + fs = mb->xmtfs; + if ((fs & XMTSV) == 0) { + printk(KERN_ERR "macmace: xmtfs not valid! (fs=%x)\n", fs); + mace_reset(dev); + /* + * XXX mace likes to hang the machine after a xmtfs error. + * This is hard to reproduce, resetting *may* help + */ + } + /* dma should have finished */ + if (!mp->tx_count) { + printk(KERN_DEBUG "macmace: tx ring ran out? (fs=%x)\n", fs); + } + /* Update stats */ + if (fs & (UFLO|LCOL|LCAR|RTRY)) { + ++dev->stats.tx_errors; + if (fs & LCAR) + ++dev->stats.tx_carrier_errors; + else if (fs & (UFLO|LCOL|RTRY)) { + ++dev->stats.tx_aborted_errors; + if (mb->xmtfs & UFLO) { + dev->stats.tx_fifo_errors++; + mace_txdma_reset(dev); + } + } + } + } + + if (mp->tx_count) + netif_wake_queue(dev); + + local_irq_restore(flags); + + return IRQ_HANDLED; +} + +static void mace_tx_timeout(struct net_device *dev, unsigned int txqueue) +{ + struct mace_data *mp = netdev_priv(dev); + volatile struct mace *mb = mp->mace; + unsigned long flags; + + local_irq_save(flags); + + /* turn off both tx and rx and reset the chip */ + mb->maccc = 0; + printk(KERN_ERR "macmace: transmit timeout - resetting\n"); + mace_txdma_reset(dev); + mace_reset(dev); + + /* restart rx dma */ + mace_rxdma_reset(dev); + + mp->tx_count = N_TX_RING; + netif_wake_queue(dev); + + /* turn it on! */ + mb->maccc = ENXMT | ENRCV; + /* enable all interrupts except receive interrupts */ + mb->imr = RCVINT; + + local_irq_restore(flags); +} + +/* + * Handle a newly arrived frame + */ + +static void mace_dma_rx_frame(struct net_device *dev, struct mace_frame *mf) +{ + struct sk_buff *skb; + unsigned int frame_status = mf->rcvsts; + + if (frame_status & (RS_OFLO | RS_CLSN | RS_FRAMERR | RS_FCSERR)) { + dev->stats.rx_errors++; + if (frame_status & RS_OFLO) + dev->stats.rx_fifo_errors++; + if (frame_status & RS_CLSN) + dev->stats.collisions++; + if (frame_status & RS_FRAMERR) + dev->stats.rx_frame_errors++; + if (frame_status & RS_FCSERR) + dev->stats.rx_crc_errors++; + } else { + unsigned int frame_length = mf->rcvcnt + ((frame_status & 0x0F) << 8 ); + + skb = netdev_alloc_skb(dev, frame_length + 2); + if (!skb) { + dev->stats.rx_dropped++; + return; + } + skb_reserve(skb, 2); + skb_put_data(skb, mf->data, frame_length); + + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += frame_length; + } +} + +/* + * The PSC has passed us a DMA interrupt event. + */ + +static irqreturn_t mace_dma_intr(int irq, void *dev_id) +{ + struct net_device *dev = (struct net_device *) dev_id; + struct mace_data *mp = netdev_priv(dev); + int left, head; + u16 status; + u32 baka; + + /* Not sure what this does */ + + while ((baka = psc_read_long(PSC_MYSTERY)) != psc_read_long(PSC_MYSTERY)); + if (!(baka & 0x60000000)) return IRQ_NONE; + + /* + * Process the read queue + */ + + status = psc_read_word(PSC_ENETRD_CTL); + + if (status & 0x2000) { + mace_rxdma_reset(dev); + } else if (status & 0x0100) { + psc_write_word(PSC_ENETRD_CMD + mp->rx_slot, 0x1100); + + left = psc_read_long(PSC_ENETRD_LEN + mp->rx_slot); + head = N_RX_RING - left; + + /* Loop through the ring buffer and process new packages */ + + while (mp->rx_tail < head) { + mace_dma_rx_frame(dev, (struct mace_frame*) (mp->rx_ring + + (mp->rx_tail * MACE_BUFF_SIZE))); + mp->rx_tail++; + } + + /* If we're out of buffers in this ring then switch to */ + /* the other set, otherwise just reactivate this one. */ + + if (!left) { + mace_load_rxdma_base(dev, mp->rx_slot); + mp->rx_slot ^= 0x10; + } else { + psc_write_word(PSC_ENETRD_CMD + mp->rx_slot, 0x9800); + } + } + + /* + * Process the write queue + */ + + status = psc_read_word(PSC_ENETWR_CTL); + + if (status & 0x2000) { + mace_txdma_reset(dev); + } else if (status & 0x0100) { + psc_write_word(PSC_ENETWR_CMD + mp->tx_sloti, 0x0100); + mp->tx_sloti ^= 0x10; + mp->tx_count++; + } + return IRQ_HANDLED; +} + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Macintosh MACE ethernet driver"); +MODULE_ALIAS("platform:macmace"); + +static int mac_mace_device_remove(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct mace_data *mp = netdev_priv(dev); + + unregister_netdev(dev); + + free_irq(dev->irq, dev); + free_irq(IRQ_MAC_MACE_DMA, dev); + + dma_free_coherent(mp->device, N_RX_RING * MACE_BUFF_SIZE, + mp->rx_ring, mp->rx_ring_phys); + dma_free_coherent(mp->device, N_TX_RING * MACE_BUFF_SIZE, + mp->tx_ring, mp->tx_ring_phys); + + free_netdev(dev); + + return 0; +} + +static struct platform_driver mac_mace_driver = { + .probe = mace_probe, + .remove = mac_mace_device_remove, + .driver = { + .name = mac_mace_string, + }, +}; + +module_platform_driver(mac_mace_driver); |