From 6fba180ee8b1c86b03d33013b4c2fc54fc5fc248 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Fri, 18 May 2012 12:56:31 +0000 Subject: [PATCH] cirrus: cs89x0: Remove function prototypes and reorder declarations Move blocks of code around to avoid function prototypes. Signed-off-by: Joe Perches Signed-off-by: David S. Miller --- drivers/net/ethernet/cirrus/cs89x0.c | 2033 +++++++++++++------------- 1 file changed, 1004 insertions(+), 1029 deletions(-) diff --git a/drivers/net/ethernet/cirrus/cs89x0.c b/drivers/net/ethernet/cirrus/cs89x0.c index 859f8bec292b..845b2020f291 100644 --- a/drivers/net/ethernet/cirrus/cs89x0.c +++ b/drivers/net/ethernet/cirrus/cs89x0.c @@ -174,28 +174,6 @@ struct net_local { #endif }; -/* Index to functions, as function prototypes. */ -static int net_open(struct net_device *dev); -static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev); -static irqreturn_t net_interrupt(int irq, void *dev_id); -static void set_multicast_list(struct net_device *dev); -static void net_timeout(struct net_device *dev); -static void net_rx(struct net_device *dev); -static int net_close(struct net_device *dev); -static struct net_device_stats *net_get_stats(struct net_device *dev); -static void reset_chip(struct net_device *dev); -static int get_eeprom_data(struct net_device *dev, int off, int len, int *buffer); -static int get_eeprom_cksum(int off, int len, int *buffer); -static int set_mac_address(struct net_device *dev, void *addr); -static void count_rx_errors(int status, struct net_device *dev); -#ifdef CONFIG_NET_POLL_CONTROLLER -static void net_poll_controller(struct net_device *dev); -#endif -#if ALLOW_DMA -static void get_dma_channel(struct net_device *dev); -static void release_dma_buff(struct net_local *lp); -#endif - /* Example routines you must write ;->. */ #define tx_done(dev) 1 @@ -321,7 +299,7 @@ get_eeprom_data(struct net_device *dev, int off, int len, int *buffer) { int i; - cs89_dbg(3, info, "EEPROM data from %x for %x:\n", off, len); + cs89_dbg(3, info, "EEPROM data from %x for %x:", off, len); for (i = 0; i < len; i++) { if (wait_eeprom_ready(dev) < 0) return -1; @@ -330,7 +308,7 @@ get_eeprom_data(struct net_device *dev, int off, int len, int *buffer) if (wait_eeprom_ready(dev) < 0) return -1; buffer[i] = readreg(dev, PP_EEData); - cs89_dbg(3, cont, "%04x ", buffer[i]); + cs89_dbg(3, cont, " %04x", buffer[i]); } cs89_dbg(3, cont, "\n"); return 0; @@ -350,6 +328,968 @@ get_eeprom_cksum(int off, int len, int *buffer) return -1; } +static void +write_irq(struct net_device *dev, int chip_type, int irq) +{ + int i; + + if (chip_type == CS8900) { +#ifndef CONFIG_CS89x0_PLATFORM + /* Search the mapping table for the corresponding IRQ pin. */ + for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++) + if (cs8900_irq_map[i] == irq) + break; + /* Not found */ + if (i == ARRAY_SIZE(cs8900_irq_map)) + i = 3; +#else + /* INTRQ0 pin is used for interrupt generation. */ + i = 0; +#endif + writereg(dev, PP_CS8900_ISAINT, i); + } else { + writereg(dev, PP_CS8920_ISAINT, irq); + } +} + +static void +count_rx_errors(int status, struct net_device *dev) +{ + dev->stats.rx_errors++; + if (status & RX_RUNT) + dev->stats.rx_length_errors++; + if (status & RX_EXTRA_DATA) + dev->stats.rx_length_errors++; + if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT))) + /* per str 172 */ + dev->stats.rx_crc_errors++; + if (status & RX_DRIBBLE) + dev->stats.rx_frame_errors++; +} + +/********************************* + * This page contains DMA routines + *********************************/ + +#if ALLOW_DMA + +#define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17) + +static void +get_dma_channel(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + + if (lp->dma) { + dev->dma = lp->dma; + lp->isa_config |= ISA_RxDMA; + } else { + if ((lp->isa_config & ANY_ISA_DMA) == 0) + return; + dev->dma = lp->isa_config & DMA_NO_MASK; + if (lp->chip_type == CS8900) + dev->dma += 5; + if (dev->dma < 5 || dev->dma > 7) { + lp->isa_config &= ~ANY_ISA_DMA; + return; + } + } +} + +static void +write_dma(struct net_device *dev, int chip_type, int dma) +{ + struct net_local *lp = netdev_priv(dev); + if ((lp->isa_config & ANY_ISA_DMA) == 0) + return; + if (chip_type == CS8900) + writereg(dev, PP_CS8900_ISADMA, dma - 5); + else + writereg(dev, PP_CS8920_ISADMA, dma); +} + +static void +set_dma_cfg(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + + if (lp->use_dma) { + if ((lp->isa_config & ANY_ISA_DMA) == 0) { + cs89_dbg(3, err, "set_dma_cfg(): no DMA\n"); + return; + } + if (lp->isa_config & ISA_RxDMA) { + lp->curr_rx_cfg |= RX_DMA_ONLY; + cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n"); + } else { + lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */ + cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n"); + } + } +} + +static int +dma_bufcfg(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + if (lp->use_dma) + return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0; + else + return 0; +} + +static int +dma_busctl(struct net_device *dev) +{ + int retval = 0; + struct net_local *lp = netdev_priv(dev); + if (lp->use_dma) { + if (lp->isa_config & ANY_ISA_DMA) + retval |= RESET_RX_DMA; /* Reset the DMA pointer */ + if (lp->isa_config & DMA_BURST) + retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */ + if (lp->dmasize == 64) + retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */ + retval |= MEMORY_ON; /* we need memory enabled to use DMA. */ + } + return retval; +} + +static void +dma_rx(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + struct sk_buff *skb; + int status, length; + unsigned char *bp = lp->rx_dma_ptr; + + status = bp[0] + (bp[1] << 8); + length = bp[2] + (bp[3] << 8); + bp += 4; + + cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n", + dev->name, (unsigned long)bp, status, length); + + if ((status & RX_OK) == 0) { + count_rx_errors(status, dev); + goto skip_this_frame; + } + + /* Malloc up new buffer. */ + skb = netdev_alloc_skb(dev, length + 2); + if (skb == NULL) { + /* I don't think we want to do this to a stressed system */ + cs89_dbg(0, err, "%s: Memory squeeze, dropping packet\n", + dev->name); + dev->stats.rx_dropped++; + + /* AKPM: advance bp to the next frame */ +skip_this_frame: + bp += (length + 3) & ~3; + if (bp >= lp->end_dma_buff) + bp -= lp->dmasize * 1024; + lp->rx_dma_ptr = bp; + return; + } + skb_reserve(skb, 2); /* longword align L3 header */ + + if (bp + length > lp->end_dma_buff) { + int semi_cnt = lp->end_dma_buff - bp; + memcpy(skb_put(skb, semi_cnt), bp, semi_cnt); + memcpy(skb_put(skb, length - semi_cnt), lp->dma_buff, + length - semi_cnt); + } else { + memcpy(skb_put(skb, length), bp, length); + } + bp += (length + 3) & ~3; + if (bp >= lp->end_dma_buff) + bp -= lp->dmasize*1024; + lp->rx_dma_ptr = bp; + + cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n", + dev->name, length, + ((skb->data[ETH_ALEN + ETH_ALEN] << 8) | + skb->data[ETH_ALEN + ETH_ALEN + 1])); + + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += length; +} + +static void release_dma_buff(struct net_local *lp) +{ + if (lp->dma_buff) { + free_pages((unsigned long)(lp->dma_buff), + get_order(lp->dmasize * 1024)); + lp->dma_buff = NULL; + } +} + +#endif /* ALLOW_DMA */ + +static void +control_dc_dc(struct net_device *dev, int on_not_off) +{ + struct net_local *lp = netdev_priv(dev); + unsigned int selfcontrol; + int timenow = jiffies; + /* control the DC to DC convertor in the SelfControl register. + * Note: This is hooked up to a general purpose pin, might not + * always be a DC to DC convertor. + */ + + selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */ + if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off) + selfcontrol |= HCB1; + else + selfcontrol &= ~HCB1; + writereg(dev, PP_SelfCTL, selfcontrol); + + /* Wait for the DC/DC converter to power up - 500ms */ + while (jiffies - timenow < HZ) + ; +} + +/* send a test packet - return true if carrier bits are ok */ +static int +send_test_pkt(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + char test_packet[] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 46, /* A 46 in network order */ + 0, 0, /* DSAP=0 & SSAP=0 fields */ + 0xf3, 0 /* Control (Test Req + P bit set) */ + }; + long timenow = jiffies; + + writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON); + + memcpy(test_packet, dev->dev_addr, ETH_ALEN); + memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN); + + iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT); + iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT); + + /* Test to see if the chip has allocated memory for the packet */ + while (jiffies - timenow < 5) + if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW) + break; + if (jiffies - timenow >= 5) + return 0; /* this shouldn't happen */ + + /* Write the contents of the packet */ + writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1); + + cs89_dbg(1, debug, "Sending test packet "); + /* wait a couple of jiffies for packet to be received */ + for (timenow = jiffies; jiffies - timenow < 3;) + ; + if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) { + cs89_dbg(1, cont, "succeeded\n"); + return 1; + } + cs89_dbg(1, cont, "failed\n"); + return 0; +} + +#define DETECTED_NONE 0 +#define DETECTED_RJ45H 1 +#define DETECTED_RJ45F 2 +#define DETECTED_AUI 3 +#define DETECTED_BNC 4 + +static int +detect_tp(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + int timenow = jiffies; + int fdx; + + cs89_dbg(1, debug, "%s: Attempting TP\n", dev->name); + + /* If connected to another full duplex capable 10-Base-T card + * the link pulses seem to be lost when the auto detect bit in + * the LineCTL is set. To overcome this the auto detect bit will + * be cleared whilst testing the 10-Base-T interface. This would + * not be necessary for the sparrow chip but is simpler to do it + * anyway. + */ + writereg(dev, PP_LineCTL, lp->linectl & ~AUI_ONLY); + control_dc_dc(dev, 0); + + /* Delay for the hardware to work out if the TP cable is present + * - 150ms + */ + for (timenow = jiffies; jiffies - timenow < 15;) + ; + if ((readreg(dev, PP_LineST) & LINK_OK) == 0) + return DETECTED_NONE; + + if (lp->chip_type == CS8900) { + switch (lp->force & 0xf0) { +#if 0 + case FORCE_AUTO: + pr_info("%s: cs8900 doesn't autonegotiate\n", + dev->name); + return DETECTED_NONE; +#endif + /* CS8900 doesn't support AUTO, change to HALF*/ + case FORCE_AUTO: + lp->force &= ~FORCE_AUTO; + lp->force |= FORCE_HALF; + break; + case FORCE_HALF: + break; + case FORCE_FULL: + writereg(dev, PP_TestCTL, + readreg(dev, PP_TestCTL) | FDX_8900); + break; + } + fdx = readreg(dev, PP_TestCTL) & FDX_8900; + } else { + switch (lp->force & 0xf0) { + case FORCE_AUTO: + lp->auto_neg_cnf = AUTO_NEG_ENABLE; + break; + case FORCE_HALF: + lp->auto_neg_cnf = 0; + break; + case FORCE_FULL: + lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX; + break; + } + + writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK); + + if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) { + pr_info("%s: negotiating duplex...\n", dev->name); + while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) { + if (jiffies - timenow > 4000) { + pr_err("**** Full / half duplex auto-negotiation timed out ****\n"); + break; + } + } + } + fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE; + } + if (fdx) + return DETECTED_RJ45F; + else + return DETECTED_RJ45H; +} + +static int +detect_bnc(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + + cs89_dbg(1, debug, "%s: Attempting BNC\n", dev->name); + control_dc_dc(dev, 1); + + writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); + + if (send_test_pkt(dev)) + return DETECTED_BNC; + else + return DETECTED_NONE; +} + +static int +detect_aui(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + + cs89_dbg(1, debug, "%s: Attempting AUI\n", dev->name); + control_dc_dc(dev, 0); + + writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); + + if (send_test_pkt(dev)) + return DETECTED_AUI; + else + return DETECTED_NONE; +} + +/* We have a good packet(s), get it/them out of the buffers. */ +static void +net_rx(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + struct sk_buff *skb; + int status, length; + + status = ioread16(lp->virt_addr + RX_FRAME_PORT); + length = ioread16(lp->virt_addr + RX_FRAME_PORT); + + if ((status & RX_OK) == 0) { + count_rx_errors(status, dev); + return; + } + + /* Malloc up new buffer. */ + skb = netdev_alloc_skb(dev, length + 2); + if (skb == NULL) { +#if 0 /* Again, this seems a cruel thing to do */ + pr_warn("%s: Memory squeeze, dropping packet\n", dev->name); +#endif + dev->stats.rx_dropped++; + return; + } + skb_reserve(skb, 2); /* longword align L3 header */ + + readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1); + if (length & 1) + skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT); + + cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n", + dev->name, length, + (skb->data[ETH_ALEN + ETH_ALEN] << 8) | + skb->data[ETH_ALEN + ETH_ALEN + 1]); + + skb->protocol = eth_type_trans(skb, dev); + netif_rx(skb); + dev->stats.rx_packets++; + dev->stats.rx_bytes += length; +} + +/* The typical workload of the driver: + * Handle the network interface interrupts. + */ + +static irqreturn_t net_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct net_local *lp; + int status; + int handled = 0; + + lp = netdev_priv(dev); + + /* we MUST read all the events out of the ISQ, otherwise we'll never + * get interrupted again. As a consequence, we can't have any limit + * on the number of times we loop in the interrupt handler. The + * hardware guarantees that eventually we'll run out of events. Of + * course, if you're on a slow machine, and packets are arriving + * faster than you can read them off, you're screwed. Hasta la + * vista, baby! + */ + while ((status = ioread16(lp->virt_addr + ISQ_PORT))) { + cs89_dbg(4, debug, "%s: event=%04x\n", dev->name, status); + handled = 1; + switch (status & ISQ_EVENT_MASK) { + case ISQ_RECEIVER_EVENT: + /* Got a packet(s). */ + net_rx(dev); + break; + case ISQ_TRANSMITTER_EVENT: + dev->stats.tx_packets++; + netif_wake_queue(dev); /* Inform upper layers. */ + if ((status & (TX_OK | + TX_LOST_CRS | + TX_SQE_ERROR | + TX_LATE_COL | + TX_16_COL)) != TX_OK) { + if ((status & TX_OK) == 0) + dev->stats.tx_errors++; + if (status & TX_LOST_CRS) + dev->stats.tx_carrier_errors++; + if (status & TX_SQE_ERROR) + dev->stats.tx_heartbeat_errors++; + if (status & TX_LATE_COL) + dev->stats.tx_window_errors++; + if (status & TX_16_COL) + dev->stats.tx_aborted_errors++; + } + break; + case ISQ_BUFFER_EVENT: + if (status & READY_FOR_TX) { + /* we tried to transmit a packet earlier, + * but inexplicably ran out of buffers. + * That shouldn't happen since we only ever + * load one packet. Shrug. Do the right + * thing anyway. + */ + netif_wake_queue(dev); /* Inform upper layers. */ + } + if (status & TX_UNDERRUN) { + cs89_dbg(0, err, "%s: transmit underrun\n", + dev->name); + lp->send_underrun++; + if (lp->send_underrun == 3) + lp->send_cmd = TX_AFTER_381; + else if (lp->send_underrun == 6) + lp->send_cmd = TX_AFTER_ALL; + /* transmit cycle is done, although + * frame wasn't transmitted - this + * avoids having to wait for the upper + * layers to timeout on us, in the + * event of a tx underrun + */ + netif_wake_queue(dev); /* Inform upper layers. */ + } +#if ALLOW_DMA + if (lp->use_dma && (status & RX_DMA)) { + int count = readreg(dev, PP_DmaFrameCnt); + while (count) { + cs89_dbg(5, debug, + "%s: receiving %d DMA frames\n", + dev->name, count); + if (count > 1) + cs89_dbg(2, debug, + "%s: receiving %d DMA frames\n", + dev->name, count); + dma_rx(dev); + if (--count == 0) + count = readreg(dev, PP_DmaFrameCnt); + if (count > 0) + cs89_dbg(2, debug, + "%s: continuing with %d DMA frames\n", + dev->name, count); + } + } +#endif + break; + case ISQ_RX_MISS_EVENT: + dev->stats.rx_missed_errors += (status >> 6); + break; + case ISQ_TX_COL_EVENT: + dev->stats.collisions += (status >> 6); + break; + } + } + return IRQ_RETVAL(handled); +} + +/* Open/initialize the board. This is called (in the current kernel) + sometime after booting when the 'ifconfig' program is run. + + This routine should set everything up anew at each open, even + registers that "should" only need to be set once at boot, so that + there is non-reboot way to recover if something goes wrong. +*/ + +/* AKPM: do we need to do any locking here? */ + +static int +net_open(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + int result = 0; + int i; + int ret; + + if (dev->irq < 2) { + /* Allow interrupts to be generated by the chip */ +/* Cirrus' release had this: */ +#if 0 + writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ); +#endif +/* And 2.3.47 had this: */ + writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); + + for (i = 2; i < CS8920_NO_INTS; i++) { + if ((1 << i) & lp->irq_map) { + if (request_irq(i, net_interrupt, 0, dev->name, + dev) == 0) { + dev->irq = i; + write_irq(dev, lp->chip_type, i); + /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */ + break; + } + } + } + + if (i >= CS8920_NO_INTS) { + writereg(dev, PP_BusCTL, 0); /* disable interrupts. */ + pr_err("can't get an interrupt\n"); + ret = -EAGAIN; + goto bad_out; + } + } else { +#if !defined(CS89x0_NONISA_IRQ) && !defined(CONFIG_CS89x0_PLATFORM) + if (((1 << dev->irq) & lp->irq_map) == 0) { + pr_err("%s: IRQ %d is not in our map of allowable IRQs, which is %x\n", + dev->name, dev->irq, lp->irq_map); + ret = -EAGAIN; + goto bad_out; + } +#endif +/* FIXME: Cirrus' release had this: */ + writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ); +/* And 2.3.47 had this: */ +#if 0 + writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); +#endif + write_irq(dev, lp->chip_type, dev->irq); + ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev); + if (ret) { + pr_err("request_irq(%d) failed\n", dev->irq); + goto bad_out; + } + } + +#if ALLOW_DMA + if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) { + unsigned long flags; + lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL, + get_order(lp->dmasize * 1024)); + if (!lp->dma_buff) { + pr_err("%s: cannot get %dK memory for DMA\n", + dev->name, lp->dmasize); + goto release_irq; + } + cs89_dbg(1, debug, "%s: dma %lx %lx\n", + dev->name, + (unsigned long)lp->dma_buff, + (unsigned long)isa_virt_to_bus(lp->dma_buff)); + if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS || + !dma_page_eq(lp->dma_buff, + lp->dma_buff + lp->dmasize * 1024 - 1)) { + pr_err("%s: not usable as DMA buffer\n", dev->name); + goto release_irq; + } + memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */ + if (request_dma(dev->dma, dev->name)) { + pr_err("%s: cannot get dma channel %d\n", + dev->name, dev->dma); + goto release_irq; + } + write_dma(dev, lp->chip_type, dev->dma); + lp->rx_dma_ptr = lp->dma_buff; + lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024; + spin_lock_irqsave(&lp->lock, flags); + disable_dma(dev->dma); + clear_dma_ff(dev->dma); + set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */ + set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff)); + set_dma_count(dev->dma, lp->dmasize * 1024); + enable_dma(dev->dma); + spin_unlock_irqrestore(&lp->lock, flags); + } +#endif /* ALLOW_DMA */ + + /* set the Ethernet address */ + for (i = 0; i < ETH_ALEN / 2; i++) + writereg(dev, PP_IA + i * 2, + (dev->dev_addr[i * 2] | + (dev->dev_addr[i * 2 + 1] << 8))); + + /* while we're testing the interface, leave interrupts disabled */ + writereg(dev, PP_BusCTL, MEMORY_ON); + + /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */ + if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && + (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH)) + lp->linectl = LOW_RX_SQUELCH; + else + lp->linectl = 0; + + /* check to make sure that they have the "right" hardware available */ + switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { + case A_CNF_MEDIA_10B_T: + result = lp->adapter_cnf & A_CNF_10B_T; + break; + case A_CNF_MEDIA_AUI: + result = lp->adapter_cnf & A_CNF_AUI; + break; + case A_CNF_MEDIA_10B_2: + result = lp->adapter_cnf & A_CNF_10B_2; + break; + default: + result = lp->adapter_cnf & (A_CNF_10B_T | + A_CNF_AUI | + A_CNF_10B_2); + } + if (!result) { + pr_err("%s: EEPROM is configured for unavailable media\n", + dev->name); +release_dma: +#if ALLOW_DMA + free_dma(dev->dma); +release_irq: + release_dma_buff(lp); +#endif + writereg(dev, PP_LineCTL, + readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON)); + free_irq(dev->irq, dev); + ret = -EAGAIN; + goto bad_out; + } + + /* set the hardware to the configured choice */ + switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { + case A_CNF_MEDIA_10B_T: + result = detect_tp(dev); + if (result == DETECTED_NONE) { + pr_warn("%s: 10Base-T (RJ-45) has no cable\n", + dev->name); + if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ + result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */ + } + break; + case A_CNF_MEDIA_AUI: + result = detect_aui(dev); + if (result == DETECTED_NONE) { + pr_warn("%s: 10Base-5 (AUI) has no cable\n", dev->name); + if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ + result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */ + } + break; + case A_CNF_MEDIA_10B_2: + result = detect_bnc(dev); + if (result == DETECTED_NONE) { + pr_warn("%s: 10Base-2 (BNC) has no cable\n", dev->name); + if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ + result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */ + } + break; + case A_CNF_MEDIA_AUTO: + writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET); + if (lp->adapter_cnf & A_CNF_10B_T) { + result = detect_tp(dev); + if (result != DETECTED_NONE) + break; + } + if (lp->adapter_cnf & A_CNF_AUI) { + result = detect_aui(dev); + if (result != DETECTED_NONE) + break; + } + if (lp->adapter_cnf & A_CNF_10B_2) { + result = detect_bnc(dev); + if (result != DETECTED_NONE) + break; + } + pr_err("%s: no media detected\n", dev->name); + goto release_dma; + } + switch (result) { + case DETECTED_NONE: + pr_err("%s: no network cable attached to configured media\n", + dev->name); + goto release_dma; + case DETECTED_RJ45H: + pr_info("%s: using half-duplex 10Base-T (RJ-45)\n", dev->name); + break; + case DETECTED_RJ45F: + pr_info("%s: using full-duplex 10Base-T (RJ-45)\n", dev->name); + break; + case DETECTED_AUI: + pr_info("%s: using 10Base-5 (AUI)\n", dev->name); + break; + case DETECTED_BNC: + pr_info("%s: using 10Base-2 (BNC)\n", dev->name); + break; + } + + /* Turn on both receive and transmit operations */ + writereg(dev, PP_LineCTL, + readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON); + + /* Receive only error free packets addressed to this card */ + lp->rx_mode = 0; + writereg(dev, PP_RxCTL, DEF_RX_ACCEPT); + + lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL; + + if (lp->isa_config & STREAM_TRANSFER) + lp->curr_rx_cfg |= RX_STREAM_ENBL; +#if ALLOW_DMA + set_dma_cfg(dev); +#endif + writereg(dev, PP_RxCFG, lp->curr_rx_cfg); + + writereg(dev, PP_TxCFG, (TX_LOST_CRS_ENBL | + TX_SQE_ERROR_ENBL | + TX_OK_ENBL | + TX_LATE_COL_ENBL | + TX_JBR_ENBL | + TX_ANY_COL_ENBL | + TX_16_COL_ENBL)); + + writereg(dev, PP_BufCFG, (READY_FOR_TX_ENBL | + RX_MISS_COUNT_OVRFLOW_ENBL | +#if ALLOW_DMA + dma_bufcfg(dev) | +#endif + TX_COL_COUNT_OVRFLOW_ENBL | + TX_UNDERRUN_ENBL)); + + /* now that we've got our act together, enable everything */ + writereg(dev, PP_BusCTL, (ENABLE_IRQ + | (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */ +#if ALLOW_DMA + | dma_busctl(dev) +#endif + )); + netif_start_queue(dev); + cs89_dbg(1, debug, "net_open() succeeded\n"); + return 0; +bad_out: + return ret; +} + +/* The inverse routine to net_open(). */ +static int +net_close(struct net_device *dev) +{ +#if ALLOW_DMA + struct net_local *lp = netdev_priv(dev); +#endif + + netif_stop_queue(dev); + + writereg(dev, PP_RxCFG, 0); + writereg(dev, PP_TxCFG, 0); + writereg(dev, PP_BufCFG, 0); + writereg(dev, PP_BusCTL, 0); + + free_irq(dev->irq, dev); + +#if ALLOW_DMA + if (lp->use_dma && lp->dma) { + free_dma(dev->dma); + release_dma_buff(lp); + } +#endif + + /* Update the statistics here. */ + return 0; +} + +/* Get the current statistics. + * This may be called with the card open or closed. + */ +static struct net_device_stats * +net_get_stats(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&lp->lock, flags); + /* Update the statistics from the device registers. */ + dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6); + dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6); + spin_unlock_irqrestore(&lp->lock, flags); + + return &dev->stats; +} + +static void net_timeout(struct net_device *dev) +{ + /* If we get here, some higher level has decided we are broken. + There should really be a "kick me" function call instead. */ + cs89_dbg(0, err, "%s: transmit timed out, %s?\n", + dev->name, + tx_done(dev) ? "IRQ conflict" : "network cable problem"); + /* Try to restart the adaptor. */ + netif_wake_queue(dev); +} + +static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned long flags; + + cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n", + dev->name, skb->len, + ((skb->data[ETH_ALEN + ETH_ALEN] << 8) | + skb->data[ETH_ALEN + ETH_ALEN + 1])); + + /* keep the upload from being interrupted, since we + * ask the chip to start transmitting before the + * whole packet has been completely uploaded. + */ + + spin_lock_irqsave(&lp->lock, flags); + netif_stop_queue(dev); + + /* initiate a transmit sequence */ + iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT); + iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT); + + /* Test to see if the chip has allocated memory for the packet */ + if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) { + /* Gasp! It hasn't. But that shouldn't happen since + * we're waiting for TxOk, so return 1 and requeue this packet. + */ + + spin_unlock_irqrestore(&lp->lock, flags); + cs89_dbg(0, err, "Tx buffer not free!\n"); + return NETDEV_TX_BUSY; + } + /* Write the contents of the packet */ + writewords(lp, TX_FRAME_PORT, skb->data, (skb->len + 1) >> 1); + spin_unlock_irqrestore(&lp->lock, flags); + dev->stats.tx_bytes += skb->len; + dev_kfree_skb(skb); + + /* We DO NOT call netif_wake_queue() here. + * We also DO NOT call netif_start_queue(). + * + * Either of these would cause another bottom half run through + * net_send_packet() before this packet has fully gone out. + * That causes us to hit the "Gasp!" above and the send is rescheduled. + * it runs like a dog. We just return and wait for the Tx completion + * interrupt handler to restart the netdevice layer + */ + + return NETDEV_TX_OK; +} + +static void set_multicast_list(struct net_device *dev) +{ + struct net_local *lp = netdev_priv(dev); + unsigned long flags; + + spin_lock_irqsave(&lp->lock, flags); + if (dev->flags & IFF_PROMISC) + lp->rx_mode = RX_ALL_ACCEPT; + else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) + /* The multicast-accept list is initialized to accept-all, + * and we rely on higher-level filtering for now. + */ + lp->rx_mode = RX_MULTCAST_ACCEPT; + else + lp->rx_mode = 0; + + writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode); + + /* in promiscuous mode, we accept errored packets, + * so we have to enable interrupts on them also + */ + writereg(dev, PP_RxCFG, + (lp->curr_rx_cfg | + (lp->rx_mode == RX_ALL_ACCEPT) + ? (RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL) + : 0)); + spin_unlock_irqrestore(&lp->lock, flags); +} + +static int set_mac_address(struct net_device *dev, void *p) +{ + int i; + struct sockaddr *addr = p; + + if (netif_running(dev)) + return -EBUSY; + + memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); + + cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n", + dev->name, dev->dev_addr); + + /* set the Ethernet address */ + for (i = 0; i < ETH_ALEN / 2; i++) + writereg(dev, PP_IA + i * 2, + (dev->dev_addr[i * 2] | + (dev->dev_addr[i * 2 + 1] << 8))); + + return 0; +} + #ifdef CONFIG_NET_POLL_CONTROLLER /* * Polling receive - used by netconsole and other diagnostic tools @@ -378,6 +1318,42 @@ static const struct net_device_ops net_ops = { .ndo_validate_addr = eth_validate_addr, }; +static void __init reset_chip(struct net_device *dev) +{ +#if !defined(CONFIG_MACH_MX31ADS) +#if !defined(CS89x0_NONISA_IRQ) + struct net_local *lp = netdev_priv(dev); +#endif /* CS89x0_NONISA_IRQ */ + int reset_start_time; + + writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET); + + /* wait 30 ms */ + msleep(30); + +#if !defined(CS89x0_NONISA_IRQ) + if (lp->chip_type != CS8900) { + /* Hardware problem requires PNP registers to be reconfigured after a reset */ + iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT); + iowrite8(dev->irq, lp->virt_addr + DATA_PORT); + iowrite8(0, lp->virt_addr + DATA_PORT + 1); + + iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT); + iowrite8((dev->mem_start >> 16) & 0xff, + lp->virt_addr + DATA_PORT); + iowrite8((dev->mem_start >> 8) & 0xff, + lp->virt_addr + DATA_PORT + 1); + } +#endif /* CS89x0_NONISA_IRQ */ + + /* Wait until the chip is reset */ + reset_start_time = jiffies; + while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 && + jiffies - reset_start_time < 2) + ; +#endif /* !CONFIG_MACH_MX31ADS */ +} + /* This is the real probe routine. * Linux has a history of friendly device probes on the ISA bus. * A good device probes avoids doing writes, and @@ -430,8 +1406,10 @@ cs89x0_probe1(struct net_device *dev, void __iomem *ioaddr, int modular) lp->chip_type = rev_type & ~REVISON_BITS; lp->chip_revision = ((rev_type & REVISON_BITS) >> 8) + 'A'; - /* Check the chip type and revision in order to set the correct send command - CS8920 revision C and CS8900 revision F can use the faster send. */ + /* Check the chip type and revision in order to set the correct + * send command. CS8920 revision C and CS8900 revision F can use + * the faster send. + */ lp->send_cmd = TX_AFTER_381; if (lp->chip_type == CS8900 && lp->chip_revision >= 'F') lp->send_cmd = TX_NOW; @@ -765,1009 +1743,6 @@ out: #endif #endif -/********************************* - * This page contains DMA routines - *********************************/ - -#if ALLOW_DMA - -#define dma_page_eq(ptr1, ptr2) ((long)(ptr1) >> 17 == (long)(ptr2) >> 17) - -static void -get_dma_channel(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - - if (lp->dma) { - dev->dma = lp->dma; - lp->isa_config |= ISA_RxDMA; - } else { - if ((lp->isa_config & ANY_ISA_DMA) == 0) - return; - dev->dma = lp->isa_config & DMA_NO_MASK; - if (lp->chip_type == CS8900) - dev->dma += 5; - if (dev->dma < 5 || dev->dma > 7) { - lp->isa_config &= ~ANY_ISA_DMA; - return; - } - } -} - -static void -write_dma(struct net_device *dev, int chip_type, int dma) -{ - struct net_local *lp = netdev_priv(dev); - if ((lp->isa_config & ANY_ISA_DMA) == 0) - return; - if (chip_type == CS8900) - writereg(dev, PP_CS8900_ISADMA, dma - 5); - else - writereg(dev, PP_CS8920_ISADMA, dma); -} - -static void -set_dma_cfg(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - - if (lp->use_dma) { - if ((lp->isa_config & ANY_ISA_DMA) == 0) { - cs89_dbg(3, err, "set_dma_cfg(): no DMA\n"); - return; - } - if (lp->isa_config & ISA_RxDMA) { - lp->curr_rx_cfg |= RX_DMA_ONLY; - cs89_dbg(3, info, "set_dma_cfg(): RX_DMA_ONLY\n"); - } else { - lp->curr_rx_cfg |= AUTO_RX_DMA; /* not that we support it... */ - cs89_dbg(3, info, "set_dma_cfg(): AUTO_RX_DMA\n"); - } - } -} - -static int -dma_bufcfg(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - if (lp->use_dma) - return (lp->isa_config & ANY_ISA_DMA) ? RX_DMA_ENBL : 0; - else - return 0; -} - -static int -dma_busctl(struct net_device *dev) -{ - int retval = 0; - struct net_local *lp = netdev_priv(dev); - if (lp->use_dma) { - if (lp->isa_config & ANY_ISA_DMA) - retval |= RESET_RX_DMA; /* Reset the DMA pointer */ - if (lp->isa_config & DMA_BURST) - retval |= DMA_BURST_MODE; /* Does ISA config specify DMA burst ? */ - if (lp->dmasize == 64) - retval |= RX_DMA_SIZE_64K; /* did they ask for 64K? */ - retval |= MEMORY_ON; /* we need memory enabled to use DMA. */ - } - return retval; -} - -static void -dma_rx(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - struct sk_buff *skb; - int status, length; - unsigned char *bp = lp->rx_dma_ptr; - - status = bp[0] + (bp[1] << 8); - length = bp[2] + (bp[3] << 8); - bp += 4; - - cs89_dbg(5, debug, "%s: receiving DMA packet at %lx, status %x, length %x\n", - dev->name, (unsigned long)bp, status, length); - - if ((status & RX_OK) == 0) { - count_rx_errors(status, dev); - goto skip_this_frame; - } - - /* Malloc up new buffer. */ - skb = netdev_alloc_skb(dev, length + 2); - if (skb == NULL) { - /* I don't think we want to do this to a stressed system */ - cs89_dbg(0, err, "%s: Memory squeeze, dropping packet\n", - dev->name); - dev->stats.rx_dropped++; - - /* AKPM: advance bp to the next frame */ -skip_this_frame: - bp += (length + 3) & ~3; - if (bp >= lp->end_dma_buff) - bp -= lp->dmasize * 1024; - lp->rx_dma_ptr = bp; - return; - } - skb_reserve(skb, 2); /* longword align L3 header */ - - if (bp + length > lp->end_dma_buff) { - int semi_cnt = lp->end_dma_buff - bp; - memcpy(skb_put(skb, semi_cnt), bp, semi_cnt); - memcpy(skb_put(skb, length - semi_cnt), lp->dma_buff, - length - semi_cnt); - } else { - memcpy(skb_put(skb, length), bp, length); - } - bp += (length + 3) & ~3; - if (bp >= lp->end_dma_buff) - bp -= lp->dmasize*1024; - lp->rx_dma_ptr = bp; - - cs89_dbg(3, info, "%s: received %d byte DMA packet of type %x\n", - dev->name, length, - ((skb->data[ETH_ALEN + ETH_ALEN] << 8) | - skb->data[ETH_ALEN + ETH_ALEN + 1])); - - skb->protocol = eth_type_trans(skb, dev); - netif_rx(skb); - dev->stats.rx_packets++; - dev->stats.rx_bytes += length; -} - -#endif /* ALLOW_DMA */ - -static void __init reset_chip(struct net_device *dev) -{ -#if !defined(CONFIG_MACH_MX31ADS) -#if !defined(CS89x0_NONISA_IRQ) - struct net_local *lp = netdev_priv(dev); -#endif /* CS89x0_NONISA_IRQ */ - int reset_start_time; - - writereg(dev, PP_SelfCTL, readreg(dev, PP_SelfCTL) | POWER_ON_RESET); - - /* wait 30 ms */ - msleep(30); - -#if !defined(CS89x0_NONISA_IRQ) - if (lp->chip_type != CS8900) { - /* Hardware problem requires PNP registers to be reconfigured after a reset */ - iowrite16(PP_CS8920_ISAINT, lp->virt_addr + ADD_PORT); - iowrite8(dev->irq, lp->virt_addr + DATA_PORT); - iowrite8(0, lp->virt_addr + DATA_PORT + 1); - - iowrite16(PP_CS8920_ISAMemB, lp->virt_addr + ADD_PORT); - iowrite8((dev->mem_start >> 16) & 0xff, - lp->virt_addr + DATA_PORT); - iowrite8((dev->mem_start >> 8) & 0xff, - lp->virt_addr + DATA_PORT + 1); - } -#endif /* CS89x0_NONISA_IRQ */ - - /* Wait until the chip is reset */ - reset_start_time = jiffies; - while ((readreg(dev, PP_SelfST) & INIT_DONE) == 0 && - jiffies - reset_start_time < 2) - ; -#endif /* !CONFIG_MACH_MX31ADS */ -} - - -static void -control_dc_dc(struct net_device *dev, int on_not_off) -{ - struct net_local *lp = netdev_priv(dev); - unsigned int selfcontrol; - int timenow = jiffies; - /* control the DC to DC convertor in the SelfControl register. - * Note: This is hooked up to a general purpose pin, might not - * always be a DC to DC convertor. - */ - - selfcontrol = HCB1_ENBL; /* Enable the HCB1 bit as an output */ - if (((lp->adapter_cnf & A_CNF_DC_DC_POLARITY) != 0) ^ on_not_off) - selfcontrol |= HCB1; - else - selfcontrol &= ~HCB1; - writereg(dev, PP_SelfCTL, selfcontrol); - - /* Wait for the DC/DC converter to power up - 500ms */ - while (jiffies - timenow < HZ) - ; -} - -#define DETECTED_NONE 0 -#define DETECTED_RJ45H 1 -#define DETECTED_RJ45F 2 -#define DETECTED_AUI 3 -#define DETECTED_BNC 4 - -static int -detect_tp(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - int timenow = jiffies; - int fdx; - - cs89_dbg(1, debug, "%s: Attempting TP\n", dev->name); - - /* If connected to another full duplex capable 10-Base-T card - * the link pulses seem to be lost when the auto detect bit in - * the LineCTL is set. To overcome this the auto detect bit will - * be cleared whilst testing the 10-Base-T interface. This would - * not be necessary for the sparrow chip but is simpler to do it - * anyway. - */ - writereg(dev, PP_LineCTL, lp->linectl & ~AUI_ONLY); - control_dc_dc(dev, 0); - - /* Delay for the hardware to work out if the TP cable is present - * - 150ms - */ - for (timenow = jiffies; jiffies - timenow < 15;) - ; - if ((readreg(dev, PP_LineST) & LINK_OK) == 0) - return DETECTED_NONE; - - if (lp->chip_type == CS8900) { - switch (lp->force & 0xf0) { -#if 0 - case FORCE_AUTO: - pr_info("%s: cs8900 doesn't autonegotiate\n", - dev->name); - return DETECTED_NONE; -#endif - /* CS8900 doesn't support AUTO, change to HALF*/ - case FORCE_AUTO: - lp->force &= ~FORCE_AUTO; - lp->force |= FORCE_HALF; - break; - case FORCE_HALF: - break; - case FORCE_FULL: - writereg(dev, PP_TestCTL, - readreg(dev, PP_TestCTL) | FDX_8900); - break; - } - fdx = readreg(dev, PP_TestCTL) & FDX_8900; - } else { - switch (lp->force & 0xf0) { - case FORCE_AUTO: - lp->auto_neg_cnf = AUTO_NEG_ENABLE; - break; - case FORCE_HALF: - lp->auto_neg_cnf = 0; - break; - case FORCE_FULL: - lp->auto_neg_cnf = RE_NEG_NOW | ALLOW_FDX; - break; - } - - writereg(dev, PP_AutoNegCTL, lp->auto_neg_cnf & AUTO_NEG_MASK); - - if ((lp->auto_neg_cnf & AUTO_NEG_BITS) == AUTO_NEG_ENABLE) { - pr_info("%s: negotiating duplex...\n", dev->name); - while (readreg(dev, PP_AutoNegST) & AUTO_NEG_BUSY) { - if (jiffies - timenow > 4000) { - pr_err("**** Full / half duplex auto-negotiation timed out ****\n"); - break; - } - } - } - fdx = readreg(dev, PP_AutoNegST) & FDX_ACTIVE; - } - if (fdx) - return DETECTED_RJ45F; - else - return DETECTED_RJ45H; -} - -/* send a test packet - return true if carrier bits are ok */ -static int -send_test_pkt(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - char test_packet[] = { - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 46, /* A 46 in network order */ - 0, 0, /* DSAP=0 & SSAP=0 fields */ - 0xf3, 0 /* Control (Test Req + P bit set) */ - }; - long timenow = jiffies; - - writereg(dev, PP_LineCTL, readreg(dev, PP_LineCTL) | SERIAL_TX_ON); - - memcpy(test_packet, dev->dev_addr, ETH_ALEN); - memcpy(test_packet + ETH_ALEN, dev->dev_addr, ETH_ALEN); - - iowrite16(TX_AFTER_ALL, lp->virt_addr + TX_CMD_PORT); - iowrite16(ETH_ZLEN, lp->virt_addr + TX_LEN_PORT); - - /* Test to see if the chip has allocated memory for the packet */ - while (jiffies - timenow < 5) - if (readreg(dev, PP_BusST) & READY_FOR_TX_NOW) - break; - if (jiffies - timenow >= 5) - return 0; /* this shouldn't happen */ - - /* Write the contents of the packet */ - writewords(lp, TX_FRAME_PORT, test_packet, (ETH_ZLEN + 1) >> 1); - - cs89_dbg(1, debug, "Sending test packet "); - /* wait a couple of jiffies for packet to be received */ - for (timenow = jiffies; jiffies - timenow < 3;) - ; - if ((readreg(dev, PP_TxEvent) & TX_SEND_OK_BITS) == TX_OK) { - cs89_dbg(1, cont, "succeeded\n"); - return 1; - } - cs89_dbg(1, cont, "failed\n"); - return 0; -} - - -static int -detect_aui(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - - cs89_dbg(1, debug, "%s: Attempting AUI\n", dev->name); - control_dc_dc(dev, 0); - - writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); - - if (send_test_pkt(dev)) - return DETECTED_AUI; - else - return DETECTED_NONE; -} - -static int -detect_bnc(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - - cs89_dbg(1, debug, "%s: Attempting BNC\n", dev->name); - control_dc_dc(dev, 1); - - writereg(dev, PP_LineCTL, (lp->linectl & ~AUTO_AUI_10BASET) | AUI_ONLY); - - if (send_test_pkt(dev)) - return DETECTED_BNC; - else - return DETECTED_NONE; -} - - -static void -write_irq(struct net_device *dev, int chip_type, int irq) -{ - int i; - - if (chip_type == CS8900) { -#ifndef CONFIG_CS89x0_PLATFORM - /* Search the mapping table for the corresponding IRQ pin. */ - for (i = 0; i != ARRAY_SIZE(cs8900_irq_map); i++) - if (cs8900_irq_map[i] == irq) - break; - /* Not found */ - if (i == ARRAY_SIZE(cs8900_irq_map)) - i = 3; -#else - /* INTRQ0 pin is used for interrupt generation. */ - i = 0; -#endif - writereg(dev, PP_CS8900_ISAINT, i); - } else { - writereg(dev, PP_CS8920_ISAINT, irq); - } -} - -/* Open/initialize the board. This is called (in the current kernel) - sometime after booting when the 'ifconfig' program is run. - - This routine should set everything up anew at each open, even - registers that "should" only need to be set once at boot, so that - there is non-reboot way to recover if something goes wrong. -*/ - -/* AKPM: do we need to do any locking here? */ - -static int -net_open(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - int result = 0; - int i; - int ret; - - if (dev->irq < 2) { - /* Allow interrupts to be generated by the chip */ -/* Cirrus' release had this: */ -#if 0 - writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL) | ENABLE_IRQ); -#endif -/* And 2.3.47 had this: */ - writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); - - for (i = 2; i < CS8920_NO_INTS; i++) { - if ((1 << i) & lp->irq_map) { - if (request_irq(i, net_interrupt, 0, dev->name, - dev) == 0) { - dev->irq = i; - write_irq(dev, lp->chip_type, i); - /* writereg(dev, PP_BufCFG, GENERATE_SW_INTERRUPT); */ - break; - } - } - } - - if (i >= CS8920_NO_INTS) { - writereg(dev, PP_BusCTL, 0); /* disable interrupts. */ - pr_err("can't get an interrupt\n"); - ret = -EAGAIN; - goto bad_out; - } - } else { -#if !defined(CS89x0_NONISA_IRQ) && !defined(CONFIG_CS89x0_PLATFORM) - if (((1 << dev->irq) & lp->irq_map) == 0) { - pr_err("%s: IRQ %d is not in our map of allowable IRQs, which is %x\n", - dev->name, dev->irq, lp->irq_map); - ret = -EAGAIN; - goto bad_out; - } -#endif -/* FIXME: Cirrus' release had this: */ - writereg(dev, PP_BusCTL, readreg(dev, PP_BusCTL)|ENABLE_IRQ); -/* And 2.3.47 had this: */ -#if 0 - writereg(dev, PP_BusCTL, ENABLE_IRQ | MEMORY_ON); -#endif - write_irq(dev, lp->chip_type, dev->irq); - ret = request_irq(dev->irq, net_interrupt, 0, dev->name, dev); - if (ret) { - pr_err("request_irq(%d) failed\n", dev->irq); - goto bad_out; - } - } - -#if ALLOW_DMA - if (lp->use_dma && (lp->isa_config & ANY_ISA_DMA)) { - unsigned long flags; - lp->dma_buff = (unsigned char *)__get_dma_pages(GFP_KERNEL, - get_order(lp->dmasize * 1024)); - if (!lp->dma_buff) { - pr_err("%s: cannot get %dK memory for DMA\n", - dev->name, lp->dmasize); - goto release_irq; - } - cs89_dbg(1, debug, "%s: dma %lx %lx\n", - dev->name, - (unsigned long)lp->dma_buff, - (unsigned long)isa_virt_to_bus(lp->dma_buff)); - if ((unsigned long)lp->dma_buff >= MAX_DMA_ADDRESS || - !dma_page_eq(lp->dma_buff, - lp->dma_buff + lp->dmasize * 1024 - 1)) { - pr_err("%s: not usable as DMA buffer\n", dev->name); - goto release_irq; - } - memset(lp->dma_buff, 0, lp->dmasize * 1024); /* Why? */ - if (request_dma(dev->dma, dev->name)) { - pr_err("%s: cannot get dma channel %d\n", - dev->name, dev->dma); - goto release_irq; - } - write_dma(dev, lp->chip_type, dev->dma); - lp->rx_dma_ptr = lp->dma_buff; - lp->end_dma_buff = lp->dma_buff + lp->dmasize * 1024; - spin_lock_irqsave(&lp->lock, flags); - disable_dma(dev->dma); - clear_dma_ff(dev->dma); - set_dma_mode(dev->dma, DMA_RX_MODE); /* auto_init as well */ - set_dma_addr(dev->dma, isa_virt_to_bus(lp->dma_buff)); - set_dma_count(dev->dma, lp->dmasize * 1024); - enable_dma(dev->dma); - spin_unlock_irqrestore(&lp->lock, flags); - } -#endif /* ALLOW_DMA */ - - /* set the Ethernet address */ - for (i = 0; i < ETH_ALEN / 2; i++) - writereg(dev, PP_IA + i * 2, - (dev->dev_addr[i * 2] | - (dev->dev_addr[i * 2 + 1] << 8))); - - /* while we're testing the interface, leave interrupts disabled */ - writereg(dev, PP_BusCTL, MEMORY_ON); - - /* Set the LineCTL quintuplet based on adapter configuration read from EEPROM */ - if ((lp->adapter_cnf & A_CNF_EXTND_10B_2) && - (lp->adapter_cnf & A_CNF_LOW_RX_SQUELCH)) - lp->linectl = LOW_RX_SQUELCH; - else - lp->linectl = 0; - - /* check to make sure that they have the "right" hardware available */ - switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { - case A_CNF_MEDIA_10B_T: - result = lp->adapter_cnf & A_CNF_10B_T; - break; - case A_CNF_MEDIA_AUI: - result = lp->adapter_cnf & A_CNF_AUI; - break; - case A_CNF_MEDIA_10B_2: - result = lp->adapter_cnf & A_CNF_10B_2; - break; - default: - result = lp->adapter_cnf & (A_CNF_10B_T | - A_CNF_AUI | - A_CNF_10B_2); - } - if (!result) { - pr_err("%s: EEPROM is configured for unavailable media\n", - dev->name); -release_dma: -#if ALLOW_DMA - free_dma(dev->dma); -release_irq: - release_dma_buff(lp); -#endif - writereg(dev, PP_LineCTL, - readreg(dev, PP_LineCTL) & ~(SERIAL_TX_ON | SERIAL_RX_ON)); - free_irq(dev->irq, dev); - ret = -EAGAIN; - goto bad_out; - } - - /* set the hardware to the configured choice */ - switch (lp->adapter_cnf & A_CNF_MEDIA_TYPE) { - case A_CNF_MEDIA_10B_T: - result = detect_tp(dev); - if (result == DETECTED_NONE) { - pr_warn("%s: 10Base-T (RJ-45) has no cable\n", - dev->name); - if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ - result = DETECTED_RJ45H; /* Yes! I don't care if I see a link pulse */ - } - break; - case A_CNF_MEDIA_AUI: - result = detect_aui(dev); - if (result == DETECTED_NONE) { - pr_warn("%s: 10Base-5 (AUI) has no cable\n", dev->name); - if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ - result = DETECTED_AUI; /* Yes! I don't care if I see a carrrier */ - } - break; - case A_CNF_MEDIA_10B_2: - result = detect_bnc(dev); - if (result == DETECTED_NONE) { - pr_warn("%s: 10Base-2 (BNC) has no cable\n", dev->name); - if (lp->auto_neg_cnf & IMM_BIT) /* check "ignore missing media" bit */ - result = DETECTED_BNC; /* Yes! I don't care if I can xmit a packet */ - } - break; - case A_CNF_MEDIA_AUTO: - writereg(dev, PP_LineCTL, lp->linectl | AUTO_AUI_10BASET); - if (lp->adapter_cnf & A_CNF_10B_T) { - result = detect_tp(dev); - if (result != DETECTED_NONE) - break; - } - if (lp->adapter_cnf & A_CNF_AUI) { - result = detect_aui(dev); - if (result != DETECTED_NONE) - break; - } - if (lp->adapter_cnf & A_CNF_10B_2) { - result = detect_bnc(dev); - if (result != DETECTED_NONE) - break; - } - pr_err("%s: no media detected\n", dev->name); - goto release_dma; - } - switch (result) { - case DETECTED_NONE: - pr_err("%s: no network cable attached to configured media\n", - dev->name); - goto release_dma; - case DETECTED_RJ45H: - pr_info("%s: using half-duplex 10Base-T (RJ-45)\n", dev->name); - break; - case DETECTED_RJ45F: - pr_info("%s: using full-duplex 10Base-T (RJ-45)\n", dev->name); - break; - case DETECTED_AUI: - pr_info("%s: using 10Base-5 (AUI)\n", dev->name); - break; - case DETECTED_BNC: - pr_info("%s: using 10Base-2 (BNC)\n", dev->name); - break; - } - - /* Turn on both receive and transmit operations */ - writereg(dev, PP_LineCTL, - readreg(dev, PP_LineCTL) | SERIAL_RX_ON | SERIAL_TX_ON); - - /* Receive only error free packets addressed to this card */ - lp->rx_mode = 0; - writereg(dev, PP_RxCTL, DEF_RX_ACCEPT); - - lp->curr_rx_cfg = RX_OK_ENBL | RX_CRC_ERROR_ENBL; - - if (lp->isa_config & STREAM_TRANSFER) - lp->curr_rx_cfg |= RX_STREAM_ENBL; -#if ALLOW_DMA - set_dma_cfg(dev); -#endif - writereg(dev, PP_RxCFG, lp->curr_rx_cfg); - - writereg(dev, PP_TxCFG, (TX_LOST_CRS_ENBL | - TX_SQE_ERROR_ENBL | - TX_OK_ENBL | - TX_LATE_COL_ENBL | - TX_JBR_ENBL | - TX_ANY_COL_ENBL | - TX_16_COL_ENBL)); - - writereg(dev, PP_BufCFG, (READY_FOR_TX_ENBL | - RX_MISS_COUNT_OVRFLOW_ENBL | -#if ALLOW_DMA - dma_bufcfg(dev) | -#endif - TX_COL_COUNT_OVRFLOW_ENBL | - TX_UNDERRUN_ENBL)); - - /* now that we've got our act together, enable everything */ - writereg(dev, PP_BusCTL, (ENABLE_IRQ - | (dev->mem_start ? MEMORY_ON : 0) /* turn memory on */ -#if ALLOW_DMA - | dma_busctl(dev) -#endif - )); - netif_start_queue(dev); - cs89_dbg(1, debug, "net_open() succeeded\n"); - return 0; -bad_out: - return ret; -} - -static void net_timeout(struct net_device *dev) -{ - /* If we get here, some higher level has decided we are broken. - There should really be a "kick me" function call instead. */ - cs89_dbg(0, err, "%s: transmit timed out, %s?\n", - dev->name, - tx_done(dev) ? "IRQ conflict" : "network cable problem"); - /* Try to restart the adaptor. */ - netif_wake_queue(dev); -} - -static netdev_tx_t net_send_packet(struct sk_buff *skb, struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - unsigned long flags; - - cs89_dbg(3, debug, "%s: sent %d byte packet of type %x\n", - dev->name, skb->len, - ((skb->data[ETH_ALEN + ETH_ALEN] << 8) | - skb->data[ETH_ALEN + ETH_ALEN + 1])); - - /* keep the upload from being interrupted, since we - * ask the chip to start transmitting before the - * whole packet has been completely uploaded. - */ - - spin_lock_irqsave(&lp->lock, flags); - netif_stop_queue(dev); - - /* initiate a transmit sequence */ - iowrite16(lp->send_cmd, lp->virt_addr + TX_CMD_PORT); - iowrite16(skb->len, lp->virt_addr + TX_LEN_PORT); - - /* Test to see if the chip has allocated memory for the packet */ - if ((readreg(dev, PP_BusST) & READY_FOR_TX_NOW) == 0) { - /* Gasp! It hasn't. But that shouldn't happen since - * we're waiting for TxOk, so return 1 and requeue this packet. - */ - - spin_unlock_irqrestore(&lp->lock, flags); - cs89_dbg(0, err, "Tx buffer not free!\n"); - return NETDEV_TX_BUSY; - } - /* Write the contents of the packet */ - writewords(lp, TX_FRAME_PORT, skb->data, (skb->len + 1) >> 1); - spin_unlock_irqrestore(&lp->lock, flags); - dev->stats.tx_bytes += skb->len; - dev_kfree_skb(skb); - - /* We DO NOT call netif_wake_queue() here. - * We also DO NOT call netif_start_queue(). - * - * Either of these would cause another bottom half run through - * net_send_packet() before this packet has fully gone out. - * That causes us to hit the "Gasp!" above and the send is rescheduled. - * it runs like a dog. We just return and wait for the Tx completion - * interrupt handler to restart the netdevice layer - */ - - return NETDEV_TX_OK; -} - -/* The typical workload of the driver: - * Handle the network interface interrupts. - */ - -static irqreturn_t net_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = dev_id; - struct net_local *lp; - int status; - int handled = 0; - - lp = netdev_priv(dev); - - /* we MUST read all the events out of the ISQ, otherwise we'll never - * get interrupted again. As a consequence, we can't have any limit - * on the number of times we loop in the interrupt handler. The - * hardware guarantees that eventually we'll run out of events. Of - * course, if you're on a slow machine, and packets are arriving - * faster than you can read them off, you're screwed. Hasta la - * vista, baby! - */ - while ((status = ioread16(lp->virt_addr + ISQ_PORT))) { - cs89_dbg(4, debug, "%s: event=%04x\n", dev->name, status); - handled = 1; - switch (status & ISQ_EVENT_MASK) { - case ISQ_RECEIVER_EVENT: - /* Got a packet(s). */ - net_rx(dev); - break; - case ISQ_TRANSMITTER_EVENT: - dev->stats.tx_packets++; - netif_wake_queue(dev); /* Inform upper layers. */ - if ((status & (TX_OK | - TX_LOST_CRS | - TX_SQE_ERROR | - TX_LATE_COL | - TX_16_COL)) != TX_OK) { - if ((status & TX_OK) == 0) - dev->stats.tx_errors++; - if (status & TX_LOST_CRS) - dev->stats.tx_carrier_errors++; - if (status & TX_SQE_ERROR) - dev->stats.tx_heartbeat_errors++; - if (status & TX_LATE_COL) - dev->stats.tx_window_errors++; - if (status & TX_16_COL) - dev->stats.tx_aborted_errors++; - } - break; - case ISQ_BUFFER_EVENT: - if (status & READY_FOR_TX) { - /* we tried to transmit a packet earlier, - * but inexplicably ran out of buffers. - * That shouldn't happen since we only ever - * load one packet. Shrug. Do the right - * thing anyway. - */ - netif_wake_queue(dev); /* Inform upper layers. */ - } - if (status & TX_UNDERRUN) { - cs89_dbg(0, err, "%s: transmit underrun\n", - dev->name); - lp->send_underrun++; - if (lp->send_underrun == 3) - lp->send_cmd = TX_AFTER_381; - else if (lp->send_underrun == 6) - lp->send_cmd = TX_AFTER_ALL; - /* transmit cycle is done, although - * frame wasn't transmitted - this - * avoids having to wait for the upper - * layers to timeout on us, in the - * event of a tx underrun - */ - netif_wake_queue(dev); /* Inform upper layers. */ - } -#if ALLOW_DMA - if (lp->use_dma && (status & RX_DMA)) { - int count = readreg(dev, PP_DmaFrameCnt); - while (count) { - cs89_dbg(5, debug, - "%s: receiving %d DMA frames\n", - dev->name, count); - if (count > 1) - cs89_dbg(2, debug, - "%s: receiving %d DMA frames\n", - dev->name, count); - dma_rx(dev); - if (--count == 0) - count = readreg(dev, PP_DmaFrameCnt); - if (count > 0) - cs89_dbg(2, debug, - "%s: continuing with %d DMA frames\n", - dev->name, count); - } - } -#endif - break; - case ISQ_RX_MISS_EVENT: - dev->stats.rx_missed_errors += (status >> 6); - break; - case ISQ_TX_COL_EVENT: - dev->stats.collisions += (status >> 6); - break; - } - } - return IRQ_RETVAL(handled); -} - -static void -count_rx_errors(int status, struct net_device *dev) -{ - dev->stats.rx_errors++; - if (status & RX_RUNT) - dev->stats.rx_length_errors++; - if (status & RX_EXTRA_DATA) - dev->stats.rx_length_errors++; - if ((status & RX_CRC_ERROR) && !(status & (RX_EXTRA_DATA | RX_RUNT))) - /* per str 172 */ - dev->stats.rx_crc_errors++; - if (status & RX_DRIBBLE) - dev->stats.rx_frame_errors++; -} - -/* We have a good packet(s), get it/them out of the buffers. */ -static void -net_rx(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - struct sk_buff *skb; - int status, length; - - status = ioread16(lp->virt_addr + RX_FRAME_PORT); - length = ioread16(lp->virt_addr + RX_FRAME_PORT); - - if ((status & RX_OK) == 0) { - count_rx_errors(status, dev); - return; - } - - /* Malloc up new buffer. */ - skb = netdev_alloc_skb(dev, length + 2); - if (skb == NULL) { -#if 0 /* Again, this seems a cruel thing to do */ - pr_warn("%s: Memory squeeze, dropping packet\n", dev->name); -#endif - dev->stats.rx_dropped++; - return; - } - skb_reserve(skb, 2); /* longword align L3 header */ - - readwords(lp, RX_FRAME_PORT, skb_put(skb, length), length >> 1); - if (length & 1) - skb->data[length-1] = ioread16(lp->virt_addr + RX_FRAME_PORT); - - cs89_dbg(3, debug, "%s: received %d byte packet of type %x\n", - dev->name, length, - (skb->data[ETH_ALEN + ETH_ALEN] << 8) | - skb->data[ETH_ALEN + ETH_ALEN + 1]); - - skb->protocol = eth_type_trans(skb, dev); - netif_rx(skb); - dev->stats.rx_packets++; - dev->stats.rx_bytes += length; -} - -#if ALLOW_DMA -static void release_dma_buff(struct net_local *lp) -{ - if (lp->dma_buff) { - free_pages((unsigned long)(lp->dma_buff), - get_order(lp->dmasize * 1024)); - lp->dma_buff = NULL; - } -} -#endif - -/* The inverse routine to net_open(). */ -static int -net_close(struct net_device *dev) -{ -#if ALLOW_DMA - struct net_local *lp = netdev_priv(dev); -#endif - - netif_stop_queue(dev); - - writereg(dev, PP_RxCFG, 0); - writereg(dev, PP_TxCFG, 0); - writereg(dev, PP_BufCFG, 0); - writereg(dev, PP_BusCTL, 0); - - free_irq(dev->irq, dev); - -#if ALLOW_DMA - if (lp->use_dma && lp->dma) { - free_dma(dev->dma); - release_dma_buff(lp); - } -#endif - - /* Update the statistics here. */ - return 0; -} - -/* Get the current statistics. - * This may be called with the card open or closed. - */ -static struct net_device_stats * -net_get_stats(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - unsigned long flags; - - spin_lock_irqsave(&lp->lock, flags); - /* Update the statistics from the device registers. */ - dev->stats.rx_missed_errors += (readreg(dev, PP_RxMiss) >> 6); - dev->stats.collisions += (readreg(dev, PP_TxCol) >> 6); - spin_unlock_irqrestore(&lp->lock, flags); - - return &dev->stats; -} - -static void set_multicast_list(struct net_device *dev) -{ - struct net_local *lp = netdev_priv(dev); - unsigned long flags; - - spin_lock_irqsave(&lp->lock, flags); - if (dev->flags & IFF_PROMISC) - lp->rx_mode = RX_ALL_ACCEPT; - else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) - /* The multicast-accept list is initialized to accept-all, - * and we rely on higher-level filtering for now. - */ - lp->rx_mode = RX_MULTCAST_ACCEPT; - else - lp->rx_mode = 0; - - writereg(dev, PP_RxCTL, DEF_RX_ACCEPT | lp->rx_mode); - - /* in promiscuous mode, we accept errored packets, - * so we have to enable interrupts on them also - */ - writereg(dev, PP_RxCFG, - (lp->curr_rx_cfg | - (lp->rx_mode == RX_ALL_ACCEPT) - ? (RX_CRC_ERROR_ENBL | RX_RUNT_ENBL | RX_EXTRA_DATA_ENBL) - : 0)); - spin_unlock_irqrestore(&lp->lock, flags); -} - -static int set_mac_address(struct net_device *dev, void *p) -{ - int i; - struct sockaddr *addr = p; - - if (netif_running(dev)) - return -EBUSY; - - memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); - - cs89_dbg(0, debug, "%s: Setting MAC address to %pM\n", - dev->name, dev->dev_addr); - - /* set the Ethernet address */ - for (i = 0; i < ETH_ALEN / 2; i++) - writereg(dev, PP_IA + i * 2, - (dev->dev_addr[i * 2] | - (dev->dev_addr[i * 2 + 1] << 8))); - - return 0; -} - #if defined(MODULE) && !defined(CONFIG_CS89x0_PLATFORM) static struct net_device *dev_cs89x0;