diff options
Diffstat (limited to 'drivers/net/sunbmac.c')
| -rw-r--r-- | drivers/net/sunbmac.c | 1306 |
1 files changed, 0 insertions, 1306 deletions
diff --git a/drivers/net/sunbmac.c b/drivers/net/sunbmac.c deleted file mode 100644 index 297a4242106b..000000000000 --- a/drivers/net/sunbmac.c +++ /dev/null @@ -1,1306 +0,0 @@ -/* sunbmac.c: Driver for Sparc BigMAC 100baseT ethernet adapters. - * - * Copyright (C) 1997, 1998, 1999, 2003, 2008 David S. Miller (davem@davemloft.net) - */ - -#include <linux/module.h> - -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/fcntl.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/in.h> -#include <linux/string.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/crc32.h> -#include <linux/errno.h> -#include <linux/ethtool.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/bitops.h> -#include <linux/dma-mapping.h> -#include <linux/of.h> -#include <linux/of_device.h> -#include <linux/gfp.h> - -#include <asm/auxio.h> -#include <asm/byteorder.h> -#include <asm/dma.h> -#include <asm/idprom.h> -#include <asm/io.h> -#include <asm/openprom.h> -#include <asm/oplib.h> -#include <asm/pgtable.h> -#include <asm/system.h> - -#include "sunbmac.h" - -#define DRV_NAME "sunbmac" -#define DRV_VERSION "2.1" -#define DRV_RELDATE "August 26, 2008" -#define DRV_AUTHOR "David S. Miller (davem@davemloft.net)" - -static char version[] = - DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " " DRV_AUTHOR "\n"; - -MODULE_VERSION(DRV_VERSION); -MODULE_AUTHOR(DRV_AUTHOR); -MODULE_DESCRIPTION("Sun BigMAC 100baseT ethernet driver"); -MODULE_LICENSE("GPL"); - -#undef DEBUG_PROBE -#undef DEBUG_TX -#undef DEBUG_IRQ - -#ifdef DEBUG_PROBE -#define DP(x) printk x -#else -#define DP(x) -#endif - -#ifdef DEBUG_TX -#define DTX(x) printk x -#else -#define DTX(x) -#endif - -#ifdef DEBUG_IRQ -#define DIRQ(x) printk x -#else -#define DIRQ(x) -#endif - -#define DEFAULT_JAMSIZE 4 /* Toe jam */ - -#define QEC_RESET_TRIES 200 - -static int qec_global_reset(void __iomem *gregs) -{ - int tries = QEC_RESET_TRIES; - - sbus_writel(GLOB_CTRL_RESET, gregs + GLOB_CTRL); - while (--tries) { - if (sbus_readl(gregs + GLOB_CTRL) & GLOB_CTRL_RESET) { - udelay(20); - continue; - } - break; - } - if (tries) - return 0; - printk(KERN_ERR "BigMAC: Cannot reset the QEC.\n"); - return -1; -} - -static void qec_init(struct bigmac *bp) -{ - struct platform_device *qec_op = bp->qec_op; - void __iomem *gregs = bp->gregs; - u8 bsizes = bp->bigmac_bursts; - u32 regval; - - /* 64byte bursts do not work at the moment, do - * not even try to enable them. -DaveM - */ - if (bsizes & DMA_BURST32) - regval = GLOB_CTRL_B32; - else - regval = GLOB_CTRL_B16; - sbus_writel(regval | GLOB_CTRL_BMODE, gregs + GLOB_CTRL); - sbus_writel(GLOB_PSIZE_2048, gregs + GLOB_PSIZE); - - /* All of memsize is given to bigmac. */ - sbus_writel(resource_size(&qec_op->resource[1]), - gregs + GLOB_MSIZE); - - /* Half to the transmitter, half to the receiver. */ - sbus_writel(resource_size(&qec_op->resource[1]) >> 1, - gregs + GLOB_TSIZE); - sbus_writel(resource_size(&qec_op->resource[1]) >> 1, - gregs + GLOB_RSIZE); -} - -#define TX_RESET_TRIES 32 -#define RX_RESET_TRIES 32 - -static void bigmac_tx_reset(void __iomem *bregs) -{ - int tries = TX_RESET_TRIES; - - sbus_writel(0, bregs + BMAC_TXCFG); - - /* The fifo threshold bit is read-only and does - * not clear. -DaveM - */ - while ((sbus_readl(bregs + BMAC_TXCFG) & ~(BIGMAC_TXCFG_FIFO)) != 0 && - --tries != 0) - udelay(20); - - if (!tries) { - printk(KERN_ERR "BIGMAC: Transmitter will not reset.\n"); - printk(KERN_ERR "BIGMAC: tx_cfg is %08x\n", - sbus_readl(bregs + BMAC_TXCFG)); - } -} - -static void bigmac_rx_reset(void __iomem *bregs) -{ - int tries = RX_RESET_TRIES; - - sbus_writel(0, bregs + BMAC_RXCFG); - while (sbus_readl(bregs + BMAC_RXCFG) && --tries) - udelay(20); - - if (!tries) { - printk(KERN_ERR "BIGMAC: Receiver will not reset.\n"); - printk(KERN_ERR "BIGMAC: rx_cfg is %08x\n", - sbus_readl(bregs + BMAC_RXCFG)); - } -} - -/* Reset the transmitter and receiver. */ -static void bigmac_stop(struct bigmac *bp) -{ - bigmac_tx_reset(bp->bregs); - bigmac_rx_reset(bp->bregs); -} - -static void bigmac_get_counters(struct bigmac *bp, void __iomem *bregs) -{ - struct net_device_stats *stats = &bp->enet_stats; - - stats->rx_crc_errors += sbus_readl(bregs + BMAC_RCRCECTR); - sbus_writel(0, bregs + BMAC_RCRCECTR); - - stats->rx_frame_errors += sbus_readl(bregs + BMAC_UNALECTR); - sbus_writel(0, bregs + BMAC_UNALECTR); - - stats->rx_length_errors += sbus_readl(bregs + BMAC_GLECTR); - sbus_writel(0, bregs + BMAC_GLECTR); - - stats->tx_aborted_errors += sbus_readl(bregs + BMAC_EXCTR); - - stats->collisions += - (sbus_readl(bregs + BMAC_EXCTR) + - sbus_readl(bregs + BMAC_LTCTR)); - sbus_writel(0, bregs + BMAC_EXCTR); - sbus_writel(0, bregs + BMAC_LTCTR); -} - -static void bigmac_clean_rings(struct bigmac *bp) -{ - int i; - - for (i = 0; i < RX_RING_SIZE; i++) { - if (bp->rx_skbs[i] != NULL) { - dev_kfree_skb_any(bp->rx_skbs[i]); - bp->rx_skbs[i] = NULL; - } - } - - for (i = 0; i < TX_RING_SIZE; i++) { - if (bp->tx_skbs[i] != NULL) { - dev_kfree_skb_any(bp->tx_skbs[i]); - bp->tx_skbs[i] = NULL; - } - } -} - -static void bigmac_init_rings(struct bigmac *bp, int from_irq) -{ - struct bmac_init_block *bb = bp->bmac_block; - struct net_device *dev = bp->dev; - int i; - gfp_t gfp_flags = GFP_KERNEL; - - if (from_irq || in_interrupt()) - gfp_flags = GFP_ATOMIC; - - bp->rx_new = bp->rx_old = bp->tx_new = bp->tx_old = 0; - - /* Free any skippy bufs left around in the rings. */ - bigmac_clean_rings(bp); - - /* Now get new skbufs for the receive ring. */ - for (i = 0; i < RX_RING_SIZE; i++) { - struct sk_buff *skb; - - skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, gfp_flags); - if (!skb) - continue; - - bp->rx_skbs[i] = skb; - skb->dev = dev; - - /* Because we reserve afterwards. */ - skb_put(skb, ETH_FRAME_LEN); - skb_reserve(skb, 34); - - bb->be_rxd[i].rx_addr = - dma_map_single(&bp->bigmac_op->dev, - skb->data, - RX_BUF_ALLOC_SIZE - 34, - DMA_FROM_DEVICE); - bb->be_rxd[i].rx_flags = - (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH)); - } - - for (i = 0; i < TX_RING_SIZE; i++) - bb->be_txd[i].tx_flags = bb->be_txd[i].tx_addr = 0; -} - -#define MGMT_CLKON (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB|MGMT_PAL_DCLOCK) -#define MGMT_CLKOFF (MGMT_PAL_INT_MDIO|MGMT_PAL_EXT_MDIO|MGMT_PAL_OENAB) - -static void idle_transceiver(void __iomem *tregs) -{ - int i = 20; - - while (i--) { - sbus_writel(MGMT_CLKOFF, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - sbus_writel(MGMT_CLKON, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - } -} - -static void write_tcvr_bit(struct bigmac *bp, void __iomem *tregs, int bit) -{ - if (bp->tcvr_type == internal) { - bit = (bit & 1) << 3; - sbus_writel(bit | (MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO), - tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - sbus_writel(bit | MGMT_PAL_OENAB | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, - tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - } else if (bp->tcvr_type == external) { - bit = (bit & 1) << 2; - sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB, - tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - sbus_writel(bit | MGMT_PAL_INT_MDIO | MGMT_PAL_OENAB | MGMT_PAL_DCLOCK, - tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - } else { - printk(KERN_ERR "write_tcvr_bit: No transceiver type known!\n"); - } -} - -static int read_tcvr_bit(struct bigmac *bp, void __iomem *tregs) -{ - int retval = 0; - - if (bp->tcvr_type == internal) { - sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, - tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3; - } else if (bp->tcvr_type == external) { - sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2; - } else { - printk(KERN_ERR "read_tcvr_bit: No transceiver type known!\n"); - } - return retval; -} - -static int read_tcvr_bit2(struct bigmac *bp, void __iomem *tregs) -{ - int retval = 0; - - if (bp->tcvr_type == internal) { - sbus_writel(MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_INT_MDIO) >> 3; - sbus_writel(MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - } else if (bp->tcvr_type == external) { - sbus_writel(MGMT_PAL_INT_MDIO, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - retval = (sbus_readl(tregs + TCVR_MPAL) & MGMT_PAL_EXT_MDIO) >> 2; - sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_DCLOCK, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - } else { - printk(KERN_ERR "read_tcvr_bit2: No transceiver type known!\n"); - } - return retval; -} - -static void put_tcvr_byte(struct bigmac *bp, - void __iomem *tregs, - unsigned int byte) -{ - int shift = 4; - - do { - write_tcvr_bit(bp, tregs, ((byte >> shift) & 1)); - shift -= 1; - } while (shift >= 0); -} - -static void bigmac_tcvr_write(struct bigmac *bp, void __iomem *tregs, - int reg, unsigned short val) -{ - int shift; - - reg &= 0xff; - val &= 0xffff; - switch(bp->tcvr_type) { - case internal: - case external: - break; - - default: - printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n"); - return; - } - - idle_transceiver(tregs); - write_tcvr_bit(bp, tregs, 0); - write_tcvr_bit(bp, tregs, 1); - write_tcvr_bit(bp, tregs, 0); - write_tcvr_bit(bp, tregs, 1); - - put_tcvr_byte(bp, tregs, - ((bp->tcvr_type == internal) ? - BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL)); - - put_tcvr_byte(bp, tregs, reg); - - write_tcvr_bit(bp, tregs, 1); - write_tcvr_bit(bp, tregs, 0); - - shift = 15; - do { - write_tcvr_bit(bp, tregs, (val >> shift) & 1); - shift -= 1; - } while (shift >= 0); -} - -static unsigned short bigmac_tcvr_read(struct bigmac *bp, - void __iomem *tregs, - int reg) -{ - unsigned short retval = 0; - - reg &= 0xff; - switch(bp->tcvr_type) { - case internal: - case external: - break; - - default: - printk(KERN_ERR "bigmac_tcvr_read: Whoops, no known transceiver type.\n"); - return 0xffff; - } - - idle_transceiver(tregs); - write_tcvr_bit(bp, tregs, 0); - write_tcvr_bit(bp, tregs, 1); - write_tcvr_bit(bp, tregs, 1); - write_tcvr_bit(bp, tregs, 0); - - put_tcvr_byte(bp, tregs, - ((bp->tcvr_type == internal) ? - BIGMAC_PHY_INTERNAL : BIGMAC_PHY_EXTERNAL)); - - put_tcvr_byte(bp, tregs, reg); - - if (bp->tcvr_type == external) { - int shift = 15; - - (void) read_tcvr_bit2(bp, tregs); - (void) read_tcvr_bit2(bp, tregs); - - do { - int tmp; - - tmp = read_tcvr_bit2(bp, tregs); - retval |= ((tmp & 1) << shift); - shift -= 1; - } while (shift >= 0); - - (void) read_tcvr_bit2(bp, tregs); - (void) read_tcvr_bit2(bp, tregs); - (void) read_tcvr_bit2(bp, tregs); - } else { - int shift = 15; - - (void) read_tcvr_bit(bp, tregs); - (void) read_tcvr_bit(bp, tregs); - - do { - int tmp; - - tmp = read_tcvr_bit(bp, tregs); - retval |= ((tmp & 1) << shift); - shift -= 1; - } while (shift >= 0); - - (void) read_tcvr_bit(bp, tregs); - (void) read_tcvr_bit(bp, tregs); - (void) read_tcvr_bit(bp, tregs); - } - return retval; -} - -static void bigmac_tcvr_init(struct bigmac *bp) -{ - void __iomem *tregs = bp->tregs; - u32 mpal; - - idle_transceiver(tregs); - sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO | MGMT_PAL_DCLOCK, - tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - - /* Only the bit for the present transceiver (internal or - * external) will stick, set them both and see what stays. - */ - sbus_writel(MGMT_PAL_INT_MDIO | MGMT_PAL_EXT_MDIO, tregs + TCVR_MPAL); - sbus_readl(tregs + TCVR_MPAL); - udelay(20); - - mpal = sbus_readl(tregs + TCVR_MPAL); - if (mpal & MGMT_PAL_EXT_MDIO) { - bp->tcvr_type = external; - sbus_writel(~(TCVR_PAL_EXTLBACK | TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE), - tregs + TCVR_TPAL); - sbus_readl(tregs + TCVR_TPAL); - } else if (mpal & MGMT_PAL_INT_MDIO) { - bp->tcvr_type = internal; - sbus_writel(~(TCVR_PAL_SERIAL | TCVR_PAL_EXTLBACK | - TCVR_PAL_MSENSE | TCVR_PAL_LTENABLE), - tregs + TCVR_TPAL); - sbus_readl(tregs + TCVR_TPAL); - } else { - printk(KERN_ERR "BIGMAC: AIEEE, neither internal nor " - "external MDIO available!\n"); - printk(KERN_ERR "BIGMAC: mgmt_pal[%08x] tcvr_pal[%08x]\n", - sbus_readl(tregs + TCVR_MPAL), - sbus_readl(tregs + TCVR_TPAL)); - } -} - -static int bigmac_init_hw(struct bigmac *, int); - -static int try_next_permutation(struct bigmac *bp, void __iomem *tregs) -{ - if (bp->sw_bmcr & BMCR_SPEED100) { - int timeout; - - /* Reset the PHY. */ - bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK); - bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr); - bp->sw_bmcr = (BMCR_RESET); - bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr); - - timeout = 64; - while (--timeout) { - bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR); - if ((bp->sw_bmcr & BMCR_RESET) == 0) - break; - udelay(20); - } - if (timeout == 0) - printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name); - - bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR); - - /* Now we try 10baseT. */ - bp->sw_bmcr &= ~(BMCR_SPEED100); - bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr); - return 0; - } - - /* We've tried them all. */ - return -1; -} - -static void bigmac_timer(unsigned long data) -{ - struct bigmac *bp = (struct bigmac *) data; - void __iomem *tregs = bp->tregs; - int restart_timer = 0; - - bp->timer_ticks++; - if (bp->timer_state == ltrywait) { - bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR); - bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR); - if (bp->sw_bmsr & BMSR_LSTATUS) { - printk(KERN_INFO "%s: Link is now up at %s.\n", - bp->dev->name, - (bp->sw_bmcr & BMCR_SPEED100) ? - "100baseT" : "10baseT"); - bp->timer_state = asleep; - restart_timer = 0; - } else { - if (bp->timer_ticks >= 4) { - int ret; - - ret = try_next_permutation(bp, tregs); - if (ret == -1) { - printk(KERN_ERR "%s: Link down, cable problem?\n", - bp->dev->name); - ret = bigmac_init_hw(bp, 0); - if (ret) { - printk(KERN_ERR "%s: Error, cannot re-init the " - "BigMAC.\n", bp->dev->name); - } - return; - } - bp->timer_ticks = 0; - restart_timer = 1; - } else { - restart_timer = 1; - } - } - } else { - /* Can't happens.... */ - printk(KERN_ERR "%s: Aieee, link timer is asleep but we got one anyways!\n", - bp->dev->name); - restart_timer = 0; - bp->timer_ticks = 0; - bp->timer_state = asleep; /* foo on you */ - } - - if (restart_timer != 0) { - bp->bigmac_timer.expires = jiffies + ((12 * HZ)/10); /* 1.2 sec. */ - add_timer(&bp->bigmac_timer); - } -} - -/* Well, really we just force the chip into 100baseT then - * 10baseT, each time checking for a link status. - */ -static void bigmac_begin_auto_negotiation(struct bigmac *bp) -{ - void __iomem *tregs = bp->tregs; - int timeout; - - /* Grab new software copies of PHY registers. */ - bp->sw_bmsr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMSR); - bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR); - - /* Reset the PHY. */ - bp->sw_bmcr = (BMCR_ISOLATE | BMCR_PDOWN | BMCR_LOOPBACK); - bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr); - bp->sw_bmcr = (BMCR_RESET); - bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr); - - timeout = 64; - while (--timeout) { - bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR); - if ((bp->sw_bmcr & BMCR_RESET) == 0) - break; - udelay(20); - } - if (timeout == 0) - printk(KERN_ERR "%s: PHY reset failed.\n", bp->dev->name); - - bp->sw_bmcr = bigmac_tcvr_read(bp, tregs, BIGMAC_BMCR); - - /* First we try 100baseT. */ - bp->sw_bmcr |= BMCR_SPEED100; - bigmac_tcvr_write(bp, tregs, BIGMAC_BMCR, bp->sw_bmcr); - - bp->timer_state = ltrywait; - bp->timer_ticks = 0; - bp->bigmac_timer.expires = jiffies + (12 * HZ) / 10; - bp->bigmac_timer.data = (unsigned long) bp; - bp->bigmac_timer.function = bigmac_timer; - add_timer(&bp->bigmac_timer); -} - -static int bigmac_init_hw(struct bigmac *bp, int from_irq) -{ - void __iomem *gregs = bp->gregs; - void __iomem *cregs = bp->creg; - void __iomem *bregs = bp->bregs; - unsigned char *e = &bp->dev->dev_addr[0]; - - /* Latch current counters into statistics. */ - bigmac_get_counters(bp, bregs); - - /* Reset QEC. */ - qec_global_reset(gregs); - - /* Init QEC. */ - qec_init(bp); - - /* Alloc and reset the tx/rx descriptor chains. */ - bigmac_init_rings(bp, from_irq); - - /* Initialize the PHY. */ - bigmac_tcvr_init(bp); - - /* Stop transmitter and receiver. */ - bigmac_stop(bp); - - /* Set hardware ethernet address. */ - sbus_writel(((e[4] << 8) | e[5]), bregs + BMAC_MACADDR2); - sbus_writel(((e[2] << 8) | e[3]), bregs + BMAC_MACADDR1); - sbus_writel(((e[0] << 8) | e[1]), bregs + BMAC_MACADDR0); - - /* Clear the hash table until mc upload occurs. */ - sbus_writel(0, bregs + BMAC_HTABLE3); - sbus_writel(0, bregs + BMAC_HTABLE2); - sbus_writel(0, bregs + BMAC_HTABLE1); - sbus_writel(0, bregs + BMAC_HTABLE0); - - /* Enable Big Mac hash table filter. */ - sbus_writel(BIGMAC_RXCFG_HENABLE | BIGMAC_RXCFG_FIFO, - bregs + BMAC_RXCFG); - udelay(20); - - /* Ok, configure the Big Mac transmitter. */ - sbus_writel(BIGMAC_TXCFG_FIFO, bregs + BMAC_TXCFG); - - /* The HME docs recommend to use the 10LSB of our MAC here. */ - sbus_writel(((e[5] | e[4] << 8) & 0x3ff), - bregs + BMAC_RSEED); - - /* Enable the output drivers no matter what. */ - sbus_writel(BIGMAC_XCFG_ODENABLE | BIGMAC_XCFG_RESV, - bregs + BMAC_XIFCFG); - - /* Tell the QEC where the ring descriptors are. */ - sbus_writel(bp->bblock_dvma + bib_offset(be_rxd, 0), - cregs + CREG_RXDS); - sbus_writel(bp->bblock_dvma + bib_offset(be_txd, 0), - cregs + CREG_TXDS); - - /* Setup the FIFO pointers into QEC local memory. */ - sbus_writel(0, cregs + CREG_RXRBUFPTR); - sbus_writel(0, cregs + CREG_RXWBUFPTR); - sbus_writel(sbus_readl(gregs + GLOB_RSIZE), - cregs + CREG_TXRBUFPTR); - sbus_writel(sbus_readl(gregs + GLOB_RSIZE), - cregs + CREG_TXWBUFPTR); - - /* Tell bigmac what interrupts we don't want to hear about. */ - sbus_writel(BIGMAC_IMASK_GOTFRAME | BIGMAC_IMASK_SENTFRAME, - bregs + BMAC_IMASK); - - /* Enable the various other irq's. */ - sbus_writel(0, cregs + CREG_RIMASK); - sbus_writel(0, cregs + CREG_TIMASK); - sbus_writel(0, cregs + CREG_QMASK); - sbus_writel(0, cregs + CREG_BMASK); - - /* Set jam size to a reasonable default. */ - sbus_writel(DEFAULT_JAMSIZE, bregs + BMAC_JSIZE); - - /* Clear collision counter. */ - sbus_writel(0, cregs + CREG_CCNT); - - /* Enable transmitter and receiver. */ - sbus_writel(sbus_readl(bregs + BMAC_TXCFG) | BIGMAC_TXCFG_ENABLE, - bregs + BMAC_TXCFG); - sbus_writel(sbus_readl(bregs + BMAC_RXCFG) | BIGMAC_RXCFG_ENABLE, - bregs + BMAC_RXCFG); - - /* Ok, start detecting link speed/duplex. */ - bigmac_begin_auto_negotiation(bp); - - /* Success. */ - return 0; -} - -/* Error interrupts get sent here. */ -static void bigmac_is_medium_rare(struct bigmac *bp, u32 qec_status, u32 bmac_status) -{ - printk(KERN_ERR "bigmac_is_medium_rare: "); - if (qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) { - if (qec_status & GLOB_STAT_ER) - printk("QEC_ERROR, "); - if (qec_status & GLOB_STAT_BM) - printk("QEC_BMAC_ERROR, "); - } - if (bmac_status & CREG_STAT_ERRORS) { - if (bmac_status & CREG_STAT_BERROR) - printk("BMAC_ERROR, "); - if (bmac_status & CREG_STAT_TXDERROR) - printk("TXD_ERROR, "); - if (bmac_status & CREG_STAT_TXLERR) - printk("TX_LATE_ERROR, "); - if (bmac_status & CREG_STAT_TXPERR) - printk("TX_PARITY_ERROR, "); - if (bmac_status & CREG_STAT_TXSERR) - printk("TX_SBUS_ERROR, "); - - if (bmac_status & CREG_STAT_RXDROP) - printk("RX_DROP_ERROR, "); - - if (bmac_status & CREG_STAT_RXSMALL) - printk("RX_SMALL_ERROR, "); - if (bmac_status & CREG_STAT_RXLERR) - printk("RX_LATE_ERROR, "); - if (bmac_status & CREG_STAT_RXPERR) - printk("RX_PARITY_ERROR, "); - if (bmac_status & CREG_STAT_RXSERR) - printk("RX_SBUS_ERROR, "); - } - - printk(" RESET\n"); - bigmac_init_hw(bp, 1); -} - -/* BigMAC transmit complete service routines. */ -static void bigmac_tx(struct bigmac *bp) -{ - struct be_txd *txbase = &bp->bmac_block->be_txd[0]; - struct net_device *dev = bp->dev; - int elem; - - spin_lock(&bp->lock); - - elem = bp->tx_old; - DTX(("bigmac_tx: tx_old[%d] ", elem)); - while (elem != bp->tx_new) { - struct sk_buff *skb; - struct be_txd *this = &txbase[elem]; - - DTX(("this(%p) [flags(%08x)addr(%08x)]", - this, this->tx_flags, this->tx_addr)); - - if (this->tx_flags & TXD_OWN) - break; - skb = bp->tx_skbs[elem]; - bp->enet_stats.tx_packets++; - bp->enet_stats.tx_bytes += skb->len; - dma_unmap_single(&bp->bigmac_op->dev, - this->tx_addr, skb->len, - DMA_TO_DEVICE); - - DTX(("skb(%p) ", skb)); - bp->tx_skbs[elem] = NULL; - dev_kfree_skb_irq(skb); - - elem = NEXT_TX(elem); - } - DTX((" DONE, tx_old=%d\n", elem)); - bp->tx_old = elem; - - if (netif_queue_stopped(dev) && - TX_BUFFS_AVAIL(bp) > 0) - netif_wake_queue(bp->dev); - - spin_unlock(&bp->lock); -} - -/* BigMAC receive complete service routines. */ -static void bigmac_rx(struct bigmac *bp) -{ - struct be_rxd *rxbase = &bp->bmac_block->be_rxd[0]; - struct be_rxd *this; - int elem = bp->rx_new, drops = 0; - u32 flags; - - this = &rxbase[elem]; - while (!((flags = this->rx_flags) & RXD_OWN)) { - struct sk_buff *skb; - int len = (flags & RXD_LENGTH); /* FCS not included */ - - /* Check for errors. */ - if (len < ETH_ZLEN) { - bp->enet_stats.rx_errors++; - bp->enet_stats.rx_length_errors++; - - drop_it: - /* Return it to the BigMAC. */ - bp->enet_stats.rx_dropped++; - this->rx_flags = - (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH)); - goto next; - } - skb = bp->rx_skbs[elem]; - if (len > RX_COPY_THRESHOLD) { - struct sk_buff *new_skb; - - /* Now refill the entry, if we can. */ - new_skb = big_mac_alloc_skb(RX_BUF_ALLOC_SIZE, GFP_ATOMIC); - if (new_skb == NULL) { - drops++; - goto drop_it; - } - dma_unmap_single(&bp->bigmac_op->dev, - this->rx_addr, - RX_BUF_ALLOC_SIZE - 34, - DMA_FROM_DEVICE); - bp->rx_skbs[elem] = new_skb; - new_skb->dev = bp->dev; - skb_put(new_skb, ETH_FRAME_LEN); - skb_reserve(new_skb, 34); - this->rx_addr = - dma_map_single(&bp->bigmac_op->dev, - new_skb->data, - RX_BUF_ALLOC_SIZE - 34, - DMA_FROM_DEVICE); - this->rx_flags = - (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH)); - - /* Trim the original skb for the netif. */ - skb_trim(skb, len); - } else { - struct sk_buff *copy_skb = dev_alloc_skb(len + 2); - - if (copy_skb == NULL) { - drops++; - goto drop_it; - } - skb_reserve(copy_skb, 2); - skb_put(copy_skb, len); - dma_sync_single_for_cpu(&bp->bigmac_op->dev, - this->rx_addr, len, - DMA_FROM_DEVICE); - skb_copy_to_linear_data(copy_skb, (unsigned char *)skb->data, len); - dma_sync_single_for_device(&bp->bigmac_op->dev, - this->rx_addr, len, - DMA_FROM_DEVICE); - - /* Reuse original ring buffer. */ - this->rx_flags = - (RXD_OWN | ((RX_BUF_ALLOC_SIZE - 34) & RXD_LENGTH)); - - skb = copy_skb; - } - - /* No checksums done by the BigMAC ;-( */ - skb->protocol = eth_type_trans(skb, bp->dev); - netif_rx(skb); - bp->enet_stats.rx_packets++; - bp->enet_stats.rx_bytes += len; - next: - elem = NEXT_RX(elem); - this = &rxbase[elem]; - } - bp->rx_new = elem; - if (drops) - printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", bp->dev->name); -} - -static irqreturn_t bigmac_interrupt(int irq, void *dev_id) -{ - struct bigmac *bp = (struct bigmac *) dev_id; - u32 qec_status, bmac_status; - - DIRQ(("bigmac_interrupt: ")); - - /* Latch status registers now. */ - bmac_status = sbus_readl(bp->creg + CREG_STAT); - qec_status = sbus_readl(bp->gregs + GLOB_STAT); - - DIRQ(("qec_status=%08x bmac_status=%08x\n", qec_status, bmac_status)); - if ((qec_status & (GLOB_STAT_ER | GLOB_STAT_BM)) || - (bmac_status & CREG_STAT_ERRORS)) - bigmac_is_medium_rare(bp, qec_status, bmac_status); - - if (bmac_status & CREG_STAT_TXIRQ) - bigmac_tx(bp); - - if (bmac_status & CREG_STAT_RXIRQ) - bigmac_rx(bp); - - return IRQ_HANDLED; -} - -static int bigmac_open(struct net_device *dev) -{ - struct bigmac *bp = netdev_priv(dev); - int ret; - - ret = request_irq(dev->irq, bigmac_interrupt, IRQF_SHARED, dev->name, bp); - if (ret) { - printk(KERN_ERR "BIGMAC: Can't order irq %d to go.\n", dev->irq); - return ret; - } - init_timer(&bp->bigmac_timer); - ret = bigmac_init_hw(bp, 0); - if (ret) - free_irq(dev->irq, bp); - return ret; -} - -static int bigmac_close(struct net_device *dev) -{ - struct bigmac *bp = netdev_priv(dev); - - del_timer(&bp->bigmac_timer); - bp->timer_state = asleep; - bp->timer_ticks = 0; - - bigmac_stop(bp); - bigmac_clean_rings(bp); - free_irq(dev->irq, bp); - return 0; -} - -static void bigmac_tx_timeout(struct net_device *dev) -{ - struct bigmac *bp = netdev_priv(dev); - - bigmac_init_hw(bp, 0); - netif_wake_queue(dev); -} - -/* Put a packet on the wire. */ -static int bigmac_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct bigmac *bp = netdev_priv(dev); - int len, entry; - u32 mapping; - - len = skb->len; - mapping = dma_map_single(&bp->bigmac_op->dev, skb->data, - len, DMA_TO_DEVICE); - - /* Avoid a race... */ - spin_lock_irq(&bp->lock); - entry = bp->tx_new; - DTX(("bigmac_start_xmit: len(%d) entry(%d)\n", len, entry)); - bp->bmac_block->be_txd[entry].tx_flags = TXD_UPDATE; - bp->tx_skbs[entry] = skb; - bp->bmac_block->be_txd[entry].tx_addr = mapping; - bp->bmac_block->be_txd[entry].tx_flags = - (TXD_OWN | TXD_SOP | TXD_EOP | (len & TXD_LENGTH)); - bp->tx_new = NEXT_TX(entry); - if (TX_BUFFS_AVAIL(bp) <= 0) - netif_stop_queue(dev); - spin_unlock_irq(&bp->lock); - - /* Get it going. */ - sbus_writel(CREG_CTRL_TWAKEUP, bp->creg + CREG_CTRL); - - - return NETDEV_TX_OK; -} - -static struct net_device_stats *bigmac_get_stats(struct net_device *dev) -{ - struct bigmac *bp = netdev_priv(dev); - - bigmac_get_counters(bp, bp->bregs); - return &bp->enet_stats; -} - -static void bigmac_set_multicast(struct net_device *dev) -{ - struct bigmac *bp = netdev_priv(dev); - void __iomem *bregs = bp->bregs; - struct netdev_hw_addr *ha; - int i; - u32 tmp, crc; - - /* Disable the receiver. The bit self-clears when - * the operation is complete. - */ - tmp = sbus_readl(bregs + BMAC_RXCFG); - tmp &= ~(BIGMAC_RXCFG_ENABLE); - sbus_writel(tmp, bregs + BMAC_RXCFG); - while ((sbus_readl(bregs + BMAC_RXCFG) & BIGMAC_RXCFG_ENABLE) != 0) - udelay(20); - - if ((dev->flags & IFF_ALLMULTI) || (netdev_mc_count(dev) > 64)) { - sbus_writel(0xffff, bregs + BMAC_HTABLE0); - sbus_writel(0xffff, bregs + BMAC_HTABLE1); - sbus_writel(0xffff, bregs + BMAC_HTABLE2); - sbus_writel(0xffff, bregs + BMAC_HTABLE3); - } else if (dev->flags & IFF_PROMISC) { - tmp = sbus_readl(bregs + BMAC_RXCFG); - tmp |= BIGMAC_RXCFG_PMISC; - sbus_writel(tmp, bregs + BMAC_RXCFG); - } else { - u16 hash_table[4]; - - for (i = 0; i < 4; i++) - hash_table[i] = 0; - - netdev_for_each_mc_addr(ha, dev) { - crc = ether_crc_le(6, ha->addr); - crc >>= 26; - hash_table[crc >> 4] |= 1 << (crc & 0xf); - } - sbus_writel(hash_table[0], bregs + BMAC_HTABLE0); - sbus_writel(hash_table[1], bregs + BMAC_HTABLE1); - sbus_writel(hash_table[2], bregs + BMAC_HTABLE2); - sbus_writel(hash_table[3], bregs + BMAC_HTABLE3); - } - - /* Re-enable the receiver. */ - tmp = sbus_readl(bregs + BMAC_RXCFG); - tmp |= BIGMAC_RXCFG_ENABLE; - sbus_writel(tmp, bregs + BMAC_RXCFG); -} - -/* Ethtool support... */ -static void bigmac_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) -{ - strcpy(info->driver, "sunbmac"); - strcpy(info->version, "2.0"); -} - -static u32 bigmac_get_link(struct net_device *dev) -{ - struct bigmac *bp = netdev_priv(dev); - - spin_lock_irq(&bp->lock); - bp->sw_bmsr = bigmac_tcvr_read(bp, bp->tregs, BIGMAC_BMSR); - spin_unlock_irq(&bp->lock); - - return (bp->sw_bmsr & BMSR_LSTATUS); -} - -static const struct ethtool_ops bigmac_ethtool_ops = { - .get_drvinfo = bigmac_get_drvinfo, - .get_link = bigmac_get_link, -}; - -static const struct net_device_ops bigmac_ops = { - .ndo_open = bigmac_open, - .ndo_stop = bigmac_close, - .ndo_start_xmit = bigmac_start_xmit, - .ndo_get_stats = bigmac_get_stats, - .ndo_set_multicast_list = bigmac_set_multicast, - .ndo_tx_timeout = bigmac_tx_timeout, - .ndo_change_mtu = eth_change_mtu, - .ndo_set_mac_address = eth_mac_addr, - .ndo_validate_addr = eth_validate_addr, -}; - -static int __devinit bigmac_ether_init(struct platform_device *op, - struct platform_device *qec_op) -{ - static int version_printed; - struct net_device *dev; - u8 bsizes, bsizes_more; - struct bigmac *bp; - int i; - - /* Get a new device struct for this interface. */ - dev = alloc_etherdev(sizeof(struct bigmac)); - if (!dev) - return -ENOMEM; - - if (version_printed++ == 0) - printk(KERN_INFO "%s", version); - - for (i = 0; i < 6; i++) - dev->dev_addr[i] = idprom->id_ethaddr[i]; - - /* Setup softc, with backpointers to QEC and BigMAC SBUS device structs. */ - bp = netdev_priv(dev); - bp->qec_op = qec_op; - bp->bigmac_op = op; - - SET_NETDEV_DEV(dev, &op->dev); - - spin_lock_init(&bp->lock); - - /* Map in QEC global control registers. */ - bp->gregs = of_ioremap(&qec_op->resource[0], 0, - GLOB_REG_SIZE, "BigMAC QEC GLobal Regs"); - if (!bp->gregs) { - printk(KERN_ERR "BIGMAC: Cannot map QEC global registers.\n"); - goto fail_and_cleanup; - } - - /* Make sure QEC is in BigMAC mode. */ - if ((sbus_readl(bp->gregs + GLOB_CTRL) & 0xf0000000) != GLOB_CTRL_BMODE) { - printk(KERN_ERR "BigMAC: AIEEE, QEC is not in BigMAC mode!\n"); - goto fail_and_cleanup; - } - - /* Reset the QEC. */ - if (qec_global_reset(bp->gregs)) - goto fail_and_cleanup; - - /* Get supported SBUS burst sizes. */ - bsizes = of_getintprop_default(qec_op->dev.of_node, "burst-sizes", 0xff); - bsizes_more = of_getintprop_default(qec_op->dev.of_node, "burst-sizes", 0xff); - - bsizes &= 0xff; - if (bsizes_more != 0xff) - bsizes &= bsizes_more; - if (bsizes == 0xff || (bsizes & DMA_BURST16) == 0 || - (bsizes & DMA_BURST32) == 0) - bsizes = (DMA_BURST32 - 1); - bp->bigmac_bursts = bsizes; - - /* Perform QEC initialization. */ - qec_init(bp); - - /* Map in the BigMAC channel registers. */ - bp->creg = of_ioremap(&op->resource[0], 0, - CREG_REG_SIZE, "BigMAC QEC Channel Regs"); - if (!bp->creg) { - printk(KERN_ERR "BIGMAC: Cannot map QEC channel registers.\n"); - goto fail_and_cleanup; - } - - /* Map in the BigMAC control registers. */ - bp->bregs = of_ioremap(&op->resource[1], 0, - BMAC_REG_SIZE, "BigMAC Primary Regs"); - if (!bp->bregs) { - printk(KERN_ERR "BIGMAC: Cannot map BigMAC primary registers.\n"); - goto fail_and_cleanup; - } - - /* Map in the BigMAC transceiver registers, this is how you poke at - * the BigMAC's PHY. - */ - bp->tregs = of_ioremap(&op->resource[2], 0, - TCVR_REG_SIZE, "BigMAC Transceiver Regs"); - if (!bp->tregs) { - printk(KERN_ERR "BIGMAC: Cannot map BigMAC transceiver registers.\n"); - goto fail_and_cleanup; - } - - /* Stop the BigMAC. */ - bigmac_stop(bp); - - /* Allocate transmit/receive descriptor DVMA block. */ - bp->bmac_block = dma_alloc_coherent(&bp->bigmac_op->dev, - PAGE_SIZE, - &bp->bblock_dvma, GFP_ATOMIC); - if (bp->bmac_block == NULL || bp->bblock_dvma == 0) { - printk(KERN_ERR "BIGMAC: Cannot allocate consistent DMA.\n"); - goto fail_and_cleanup; - } - - /* Get the board revision of this BigMAC. */ - bp->board_rev = of_getintprop_default(bp->bigmac_op->dev.of_node, - "board-version", 1); - - /* Init auto-negotiation timer state. */ - init_timer(&bp->bigmac_timer); - bp->timer_state = asleep; - bp->timer_ticks = 0; - - /* Backlink to generic net device struct. */ - bp->dev = dev; - - /* Set links to our BigMAC open and close routines. */ - dev->ethtool_ops = &bigmac_ethtool_ops; - dev->netdev_ops = &bigmac_ops; - dev->watchdog_timeo = 5*HZ; - - /* Finish net device registration. */ - dev->irq = bp->bigmac_op->archdata.irqs[0]; - dev->dma = 0; - - if (register_netdev(dev)) { - printk(KERN_ERR "BIGMAC: Cannot register device.\n"); - goto fail_and_cleanup; - } - - dev_set_drvdata(&bp->bigmac_op->dev, bp); - - printk(KERN_INFO "%s: BigMAC 100baseT Ethernet %pM\n", - dev->name, dev->dev_addr); - - return 0; - -fail_and_cleanup: - /* Something went wrong, undo whatever we did so far. */ - /* Free register mappings if any. */ - if (bp->gregs) - of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE); - if (bp->creg) - of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE); - if (bp->bregs) - of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE); - if (bp->tregs) - of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE); - - if (bp->bmac_block) - dma_free_coherent(&bp->bigmac_op->dev, - PAGE_SIZE, - bp->bmac_block, - bp->bblock_dvma); - - /* This also frees the co-located private data */ - free_netdev(dev); - return -ENODEV; -} - -/* QEC can be the parent of either QuadEthernet or a BigMAC. We want - * the latter. - */ -static int __devinit bigmac_sbus_probe(struct platform_device *op) -{ - struct device *parent = op->dev.parent; - struct platform_device *qec_op; - - qec_op = to_platform_device(parent); - - return bigmac_ether_init(op, qec_op); -} - -static int __devexit bigmac_sbus_remove(struct platform_device *op) -{ - struct bigmac *bp = dev_get_drvdata(&op->dev); - struct device *parent = op->dev.parent; - struct net_device *net_dev = bp->dev; - struct platform_device *qec_op; - - qec_op = to_platform_device(parent); - - unregister_netdev(net_dev); - - of_iounmap(&qec_op->resource[0], bp->gregs, GLOB_REG_SIZE); - of_iounmap(&op->resource[0], bp->creg, CREG_REG_SIZE); - of_iounmap(&op->resource[1], bp->bregs, BMAC_REG_SIZE); - of_iounmap(&op->resource[2], bp->tregs, TCVR_REG_SIZE); - dma_free_coherent(&op->dev, - PAGE_SIZE, - bp->bmac_block, - bp->bblock_dvma); - - free_netdev(net_dev); - - dev_set_drvdata(&op->dev, NULL); - - return 0; -} - -static const struct of_device_id bigmac_sbus_match[] = { - { - .name = "be", - }, - {}, -}; - -MODULE_DEVICE_TABLE(of, bigmac_sbus_match); - -static struct platform_driver bigmac_sbus_driver = { - .driver = { - .name = "sunbmac", - .owner = THIS_MODULE, - .of_match_table = bigmac_sbus_match, - }, - .probe = bigmac_sbus_probe, - .remove = __devexit_p(bigmac_sbus_remove), -}; - -static int __init bigmac_init(void) -{ - return platform_driver_register(&bigmac_sbus_driver); -} - -static void __exit bigmac_exit(void) -{ - platform_driver_unregister(&bigmac_sbus_driver); -} - -module_init(bigmac_init); -module_exit(bigmac_exit); |