static void psc_load_rxdma_base(int set, void *base)
{
psc_write_word(PSC_ENETRD_CMD + set, 0x0100);
psc_write_long(PSC_ENETRD_ADDR + set, (u32)base);
psc_write_long(PSC_ENETRD_LEN + set, N_RX_RING);
psc_write_word(PSC_ENETRD_CMD + set, 0x9800);
}
static void mace_dma_intr(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *) dev_id;
struct mace_data *mp = (struct mace_data *) dev->priv;
int left, head;
u16 status;
u32 baka;
/* Not sure what this does */
while ((baka = psc_read_long(PSC_MYSTERY)) != psc_read_long(PSC_MYSTERY));
if (!(baka & 0x60000000)) return;
/*
* Process the read queue
*/
status = psc_read_word(PSC_ENETRD_CTL);
if (status & 0x2000) {
mace_rxdma_reset(dev);
} else if (status & 0x0100) {
psc_write_word(PSC_ENETRD_CMD + mp->rx_slot, 0x1100);
left = psc_read_long(PSC_ENETRD_LEN + mp->rx_slot);
head = N_RX_RING - left;
/* Loop through the ring buffer and process new packages */
while (mp->rx_tail < head) {
mace_dma_rx_frame(dev, (struct mace_frame *) (mp->rx_ring + (mp->rx_tail * 0x0800)));
mp->rx_tail++;
}
/* If we're out of buffers in this ring then switch to */
/* the other set, otherwise just reactivate this one. */
if (!left) {
mace_load_rxdma_base(dev, mp->rx_slot);
mp->rx_slot ^= 0x10;
} else {
psc_write_word(PSC_ENETRD_CMD + mp->rx_slot, 0x9800);
}
}
/*
* Process the write queue
*/
status = psc_read_word(PSC_ENETWR_CTL);
if (status & 0x2000) {
mace_txdma_reset(dev);
} else if (status & 0x0100) {
psc_write_word(PSC_ENETWR_CMD + mp->tx_sloti, 0x0100);
mp->tx_sloti ^= 0x10;
mp->tx_count++;
netif_wake_queue(dev);
}
}
static int mace_open(struct net_device *dev)
{
struct mace_data *mp = netdev_priv(dev);
volatile struct mace *mb = mp->mace;
/* reset the chip */
mace_reset(dev);
if (request_irq(dev->irq, mace_interrupt, 0, dev->name, dev)) {
printk(KERN_ERR "%s: can't get irq %d\n", dev->name, dev->irq);
return -EAGAIN;
}
if (request_irq(mp->dma_intr, mace_dma_intr, 0, dev->name, dev)) {
printk(KERN_ERR "%s: can't get irq %d\n", dev->name, mp->dma_intr);
free_irq(dev->irq, dev);
return -EAGAIN;
}
/* Allocate the DMA ring buffers */
mp->tx_ring = dma_alloc_coherent(mp->device,
N_TX_RING * MACE_BUFF_SIZE,
&mp->tx_ring_phys, GFP_KERNEL);
if (mp->tx_ring == NULL)
goto out1;
mp->rx_ring = dma_alloc_coherent(mp->device,
N_RX_RING * MACE_BUFF_SIZE,
&mp->rx_ring_phys, GFP_KERNEL);
if (mp->rx_ring == NULL)
goto out2;
mace_dma_off(dev);
/* Not sure what these do */
psc_write_word(PSC_ENETWR_CTL, 0x9000);
psc_write_word(PSC_ENETRD_CTL, 0x9000);
psc_write_word(PSC_ENETWR_CTL, 0x0400);
psc_write_word(PSC_ENETRD_CTL, 0x0400);
mace_rxdma_reset(dev);
mace_txdma_reset(dev);
/* turn it on! */
mb->maccc = ENXMT | ENRCV;
/* enable all interrupts except receive interrupts */
mb->imr = RCVINT;
return 0;
out2:
dma_free_coherent(mp->device, N_TX_RING * MACE_BUFF_SIZE,
mp->tx_ring, mp->tx_ring_phys);
out1:
free_irq(dev->irq, dev);
free_irq(mp->dma_intr, dev);
return -ENOMEM;
}
static void mace_load_rxdma_base(struct net_device *dev, int set)
{
struct mace_data *mp = netdev_priv(dev);
psc_write_word(PSC_ENETRD_CMD + set, 0x0100);
psc_write_long(PSC_ENETRD_ADDR + set, (u32) mp->rx_ring_phys);
psc_write_long(PSC_ENETRD_LEN + set, N_RX_RING);
psc_write_word(PSC_ENETRD_CMD + set, 0x9800);
mp->rx_tail = 0;
}
static void mace68k_txdma_reset(struct net_device *dev)
{
struct mace68k_data *mp = (struct mace68k_data *) dev->priv;
volatile struct mace *mace = mp->mace;
u8 mcc = mace->maccc;
psc_write_word(PSC_ENETWR_CTL,0x8800);
mace->maccc = mcc&~ENXMT;
psc_write_word(PSC_ENETWR_CTL,0x0400);
mace->maccc = mcc;
}
static __init void psc_dma_die_die_die(void)
{
int i;
printk("Killing all PSC DMA channels...");
for (i = 0 ; i < 9 ; i++) {
psc_write_word(PSC_CTL_BASE + (i << 4), 0x8800);
psc_write_word(PSC_CTL_BASE + (i << 4), 0x1000);
psc_write_word(PSC_CMD_BASE + (i << 5), 0x1100);
psc_write_word(PSC_CMD_BASE + (i << 5) + 0x10, 0x1100);
}
printk("done!\n");
}
static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev)
{
struct mace_data *mp = netdev_priv(dev);
unsigned long flags;
/* Stop the queue since there's only the one buffer */
local_irq_save(flags);
netif_stop_queue(dev);
if (!mp->tx_count) {
printk(KERN_ERR "macmace: tx queue running but no free buffers.\n");
local_irq_restore(flags);
return NETDEV_TX_BUSY;
}
mp->tx_count--;
local_irq_restore(flags);
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
/* We need to copy into our xmit buffer to take care of alignment and caching issues */
skb_copy_from_linear_data(skb, mp->tx_ring, skb->len);
/* load the Tx DMA and fire it off */
psc_write_long(PSC_ENETWR_ADDR + mp->tx_slot, (u32) mp->tx_ring_phys);
psc_write_long(PSC_ENETWR_LEN + mp->tx_slot, skb->len);
psc_write_word(PSC_ENETWR_CMD + mp->tx_slot, 0x9800);
mp->tx_slot ^= 0x10;
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev)
{
struct mace_data *mp = netdev_priv(dev);
unsigned long flags;
local_irq_save(flags);
netif_stop_queue(dev);
if (!mp->tx_count) {
printk(KERN_ERR "macmace: tx queue running but no free buffers.\n");
local_irq_restore(flags);
return NETDEV_TX_BUSY;
}
mp->tx_count--;
local_irq_restore(flags);
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
skb_copy_from_linear_data(skb, mp->tx_ring, skb->len);
psc_write_long(PSC_ENETWR_ADDR + mp->tx_slot, (u32) mp->tx_ring_phys);
psc_write_long(PSC_ENETWR_LEN + mp->tx_slot, skb->len);
psc_write_word(PSC_ENETWR_CMD + mp->tx_slot, 0x9800);
mp->tx_slot ^= 0x10;
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static int mace_xmit_start(struct sk_buff *skb, struct net_device *dev)
{
struct mace_data *mp = (struct mace_data *) dev->priv;
/* Stop the queue if the buffer is full */
if (!mp->tx_count) {
netif_stop_queue(dev);
return 1;
}
mp->tx_count--;
mp->stats.tx_packets++;
mp->stats.tx_bytes += skb->len;
/* We need to copy into our xmit buffer to take care of alignment and caching issues */
memcpy((void *) mp->tx_ring, skb->data, skb->len);
/* load the Tx DMA and fire it off */
psc_write_long(PSC_ENETWR_ADDR + mp->tx_slot, (u32) mp->tx_ring_phys);
psc_write_long(PSC_ENETWR_LEN + mp->tx_slot, skb->len);
psc_write_word(PSC_ENETWR_CMD + mp->tx_slot, 0x9800);
mp->tx_slot ^= 0x10;
dev_kfree_skb(skb);
return 0;
}
static void mace_txdma_reset(struct net_device *dev)
{
struct mace_data *mp = netdev_priv(dev);
volatile struct mace *mace = mp->mace;
u8 maccc;
psc_write_word(PSC_ENETWR_CTL, 0x8800);
maccc = mace->maccc;
mace->maccc = maccc & ~ENXMT;
mp->tx_slot = mp->tx_sloti = 0;
mp->tx_count = N_TX_RING;
psc_write_word(PSC_ENETWR_CTL, 0x0400);
mace->maccc = maccc;
}
static void mace68k_dma_off(struct net_device *dev)
{
psc_write_word(PSC_ENETRD_CTL, 0x8800);
psc_write_word(PSC_ENETRD_CTL, 0x1000);
psc_write_word(PSC_ENETRD_CMD, 0x1100);
psc_write_word(PSC_ENETRD_CMD+0x10, 0x1100);
psc_write_word(PSC_ENETWR_CTL, 0x8800);
psc_write_word(PSC_ENETWR_CTL, 0x1000);
psc_write_word(PSC_ENETWR_CMD, 0x1100);
psc_write_word(PSC_ENETWR_CMD+0x10, 0x1100);
}
static void mace68k_rxdma_reset(struct net_device *dev)
{
struct mace68k_data *mp = (struct mace68k_data *) dev->priv;
volatile struct mace *mace = mp->mace;
u8 mcc = mace->maccc;
/*
* Turn off receive
*/
mcc&=~ENRCV;
mace->maccc=mcc;
/*
* Program the DMA
*/
psc_write_word(PSC_ENETRD_CTL, 0x8800);
psc_load_rxdma_base(0x0, (void *)virt_to_bus(mp->rx_ring));
psc_write_word(PSC_ENETRD_CTL, 0x0400);
psc_write_word(PSC_ENETRD_CTL, 0x8800);
psc_load_rxdma_base(0x10, (void *)virt_to_bus(mp->rx_ring));
psc_write_word(PSC_ENETRD_CTL, 0x0400);
mace->maccc=mcc|ENRCV;
#if 0
psc_write_word(PSC_ENETRD_CTL, 0x9800);
psc_write_word(PSC_ENETRD_CTL+0x10, 0x9800);
#endif
}
static int mace68k_xmit_start(struct sk_buff *skb, struct net_device *dev)
{
struct mace68k_data *mp = (struct mace68k_data *) dev->priv;
/*
* This may need atomic types ???
*/
printk("mace68k_xmit_start: mp->tx_count = %d, dev->tbusy = %d, mp->tx_ring = %p (%p)\n",
mp->tx_count, dev->tbusy,
mp->tx_ring, virt_to_bus(mp->tx_ring));
psc_debug_dump();
if(mp->tx_count == 0)
{
dev->tbusy=1;
mace68k_dma_intr(IRQ_MAC_MACE_DMA, dev, NULL);
return 1;
}
mp->tx_count--;
/*
* FIXME:
* This is hackish. The memcpy probably isnt needed but
* the rules for alignment are not known. Ideally we'd like
* to just blast the skb directly to ethernet. We also don't
* use the ring properly - just a one frame buffer. That
* also requires cache pushes ;).
*/
memcpy((void *)mp->tx_ring, skb, skb->len);
psc_write_long(PSC_ENETWR_ADDR + mp->tx_slot, virt_to_bus(mp->tx_ring));
psc_write_long(PSC_ENETWR_LEN + mp->tx_slot, skb->len);
psc_write_word(PSC_ENETWR_CMD + mp->tx_slot, 0x9800);
mp->stats.tx_packets++;
mp->stats.tx_bytes+=skb->len;
dev_kfree_skb(skb);
return 0;
}
static void mace_rxdma_reset(struct net_device *dev)
{
struct mace_data *mp = netdev_priv(dev);
volatile struct mace *mace = mp->mace;
u8 maccc = mace->maccc;
mace->maccc = maccc & ~ENRCV;
psc_write_word(PSC_ENETRD_CTL, 0x8800);
mace_load_rxdma_base(dev, 0x00);
psc_write_word(PSC_ENETRD_CTL, 0x0400);
psc_write_word(PSC_ENETRD_CTL, 0x8800);
mace_load_rxdma_base(dev, 0x10);
psc_write_word(PSC_ENETRD_CTL, 0x0400);
mace->maccc = maccc;
mp->rx_slot = 0;
psc_write_word(PSC_ENETRD_CMD + PSC_SET0, 0x9800);
psc_write_word(PSC_ENETRD_CMD + PSC_SET1, 0x9800);
}
int mace68k_probe(struct net_device *unused)
{
int j;
static int once=0;
struct mace68k_data *mp;
unsigned char *addr;
struct net_device *dev;
unsigned char checksum = 0;
/*
* There can be only one...
*/
if (once) return -ENODEV;
once = 1;
if (macintosh_config->ether_type != MAC_ETHER_MACE) return -ENODEV;
printk("MACE ethernet should be present ");
dev = init_etherdev(0, PRIV_BYTES);
if(dev==NULL)
{
printk("no free memory.\n");
return -ENOMEM;
}
mp = (struct mace68k_data *) dev->priv;
dev->base_addr = (u32)MACE_BASE;
mp->mace = (volatile struct mace *) MACE_BASE;
printk("at 0x%p", mp->mace);
/*
* 16K RX ring and 4K TX ring should do nicely
*/
mp->rx_ring=(void *)__get_free_pages(GFP_KERNEL, 2);
mp->tx_ring=(void *)__get_free_page(GFP_KERNEL);
printk(".");
if(mp->tx_ring==NULL || mp->rx_ring==NULL)
{
if(mp->tx_ring)
free_page((u32)mp->tx_ring);
// if(mp->rx_ring)
// __free_pages(mp->rx_ring,2);
printk("\nNo memory for ring buffers.\n");
return -ENOMEM;
}
/* We want the receive data to be uncached. We dont care about the
byte reading order */
printk(".");
kernel_set_cachemode((void *)mp->rx_ring, 16384, IOMAP_NOCACHE_NONSER);
printk(".");
/* The transmit buffer needs to be write through */
kernel_set_cachemode((void *)mp->tx_ring, 4096, IOMAP_WRITETHROUGH);
printk(" Ok\n");
dev->irq = IRQ_MAC_MACE;
printk(KERN_INFO "%s: MACE at", dev->name);
/*
* The PROM contains 8 bytes which total 0xFF when XOR'd
* together. Due to the usual peculiar apple brain damage
* the bytes are spaced out in a strange boundary and the
* bits are reversed.
*/
addr = (void *)MACE_PROM;
for (j = 0; j < 6; ++j)
{
u8 v=bitrev(addr[j<<4]);
checksum^=v;
dev->dev_addr[j] = v;
printk("%c%.2x", (j ? ':' : ' '), dev->dev_addr[j]);
}
for (; j < 8; ++j)
{
checksum^=bitrev(addr[j<<4]);
}
if(checksum!=0xFF)
{
printk(" (invalid checksum)\n");
return -ENODEV;
}
printk("\n");
memset(&mp->stats, 0, sizeof(mp->stats));
init_timer(&mp->tx_timeout);
mp->timeout_active = 0;
dev->open = mace68k_open;
dev->stop = mace68k_close;
dev->hard_start_xmit = mace68k_xmit_start;
dev->get_stats = mace68k_stats;
dev->set_multicast_list = mace68k_set_multicast;
dev->set_mac_address = mace68k_set_address;
ether_setup(dev);
mp = (struct mace68k_data *) dev->priv;
mp->maccc = ENXMT | ENRCV;
mp->dma_intr = IRQ_MAC_MACE_DMA;
psc_write_word(PSC_ENETWR_CTL, 0x9000);
psc_write_word(PSC_ENETRD_CTL, 0x9000);
psc_write_word(PSC_ENETWR_CTL, 0x0400);
psc_write_word(PSC_ENETRD_CTL, 0x0400);
/* apple's driver doesn't seem to do this */
/* except at driver shutdown time... */
#if 0
mace68k_dma_off(dev);
#endif
return 0;
}
static int mace_open(struct net_device *dev)
{
struct mace_data *mp = netdev_priv(dev);
volatile struct mace *mb = mp->mace;
mace_reset(dev);
if (request_irq(dev->irq, mace_interrupt, 0, dev->name, dev)) {
printk(KERN_ERR "%s: can't get irq %d\n", dev->name, dev->irq);
return -EAGAIN;
}
if (request_irq(mp->dma_intr, mace_dma_intr, 0, dev->name, dev)) {
printk(KERN_ERR "%s: can't get irq %d\n", dev->name, mp->dma_intr);
free_irq(dev->irq, dev);
return -EAGAIN;
}
mp->tx_ring = dma_alloc_coherent(mp->device,
N_TX_RING * MACE_BUFF_SIZE,
&mp->tx_ring_phys, GFP_KERNEL);
if (mp->tx_ring == NULL) {
printk(KERN_ERR "%s: unable to allocate DMA tx buffers\n", dev->name);
goto out1;
}
mp->rx_ring = dma_alloc_coherent(mp->device,
N_RX_RING * MACE_BUFF_SIZE,
&mp->rx_ring_phys, GFP_KERNEL);
if (mp->rx_ring == NULL) {
printk(KERN_ERR "%s: unable to allocate DMA rx buffers\n", dev->name);
goto out2;
}
mace_dma_off(dev);
psc_write_word(PSC_ENETWR_CTL, 0x9000);
psc_write_word(PSC_ENETRD_CTL, 0x9000);
psc_write_word(PSC_ENETWR_CTL, 0x0400);
psc_write_word(PSC_ENETRD_CTL, 0x0400);
mace_rxdma_reset(dev);
mace_txdma_reset(dev);
mb->maccc = ENXMT | ENRCV;
mb->imr = RCVINT;
return 0;
out2:
dma_free_coherent(mp->device, N_TX_RING * MACE_BUFF_SIZE,
mp->tx_ring, mp->tx_ring_phys);
out1:
free_irq(dev->irq, dev);
free_irq(mp->dma_intr, dev);
return -ENOMEM;
}
static int mace_open(struct net_device *dev)
{
struct mace_data *mp = (struct mace_data *) dev->priv;
volatile struct mace *mb = mp->mace;
#if 0
int i;
i = 200;
while (--i) {
mb->biucc = SWRST;
if (mb->biucc & SWRST) {
udelay(10);
continue;
}
break;
}
if (!i) {
printk(KERN_ERR "%s: software reset failed!!\n", dev->name);
return -EAGAIN;
}
#endif
mb->biucc = XMTSP_64;
mb->fifocc = XMTFW_16 | RCVFW_64 | XMTFWU | RCVFWU | XMTBRST | RCVBRST;
mb->xmtfc = AUTO_PAD_XMIT;
mb->plscc = PORTSEL_AUI;
/* mb->utr = RTRD; */
if (request_irq(dev->irq, mace_interrupt, 0, dev->name, dev)) {
printk(KERN_ERR "%s: can't get irq %d\n", dev->name, dev->irq);
return -EAGAIN;
}
if (request_irq(mp->dma_intr, mace_dma_intr, 0, dev->name, dev)) {
printk(KERN_ERR "%s: can't get irq %d\n", dev->name, mp->dma_intr);
free_irq(dev->irq, dev);
return -EAGAIN;
}
/* Allocate the DMA ring buffers */
mp->rx_ring = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, N_RX_PAGES);
mp->tx_ring = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, 0);
if (mp->tx_ring==NULL || mp->rx_ring==NULL) {
if (mp->rx_ring) free_pages((u32) mp->rx_ring, N_RX_PAGES);
if (mp->tx_ring) free_pages((u32) mp->tx_ring, 0);
free_irq(dev->irq, dev);
free_irq(mp->dma_intr, dev);
printk(KERN_ERR "%s: unable to allocate DMA buffers\n", dev->name);
return -ENOMEM;
}
mp->rx_ring_phys = (unsigned char *) virt_to_bus((void *)mp->rx_ring);
mp->tx_ring_phys = (unsigned char *) virt_to_bus((void *)mp->tx_ring);
/* We want the Rx buffer to be uncached and the Tx buffer to be writethrough */
kernel_set_cachemode((void *)mp->rx_ring, N_RX_PAGES * PAGE_SIZE, IOMAP_NOCACHE_NONSER);
kernel_set_cachemode((void *)mp->tx_ring, PAGE_SIZE, IOMAP_WRITETHROUGH);
mace_dma_off(dev);
/* Not sure what these do */
psc_write_word(PSC_ENETWR_CTL, 0x9000);
psc_write_word(PSC_ENETRD_CTL, 0x9000);
psc_write_word(PSC_ENETWR_CTL, 0x0400);
psc_write_word(PSC_ENETRD_CTL, 0x0400);
#if 0
/* load up the hardware address */
mb->iac = ADDRCHG | PHYADDR;
while ((mb->iac & ADDRCHG) != 0);
for (i = 0; i < 6; ++i)
mb->padr = dev->dev_addr[i];
/* clear the multicast filter */
mb->iac = ADDRCHG | LOGADDR;
while ((mb->iac & ADDRCHG) != 0);
for (i = 0; i < 8; ++i)
mb->ladrf = 0;
mb->plscc = PORTSEL_GPSI + ENPLSIO;
mb->maccc = ENXMT | ENRCV;
mb->imr = RCVINT;
#endif
mace_rxdma_reset(dev);
mace_txdma_reset(dev);
return 0;
}