382 lines
8.7 KiB
C
382 lines
8.7 KiB
C
/*
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* sonic.c
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*
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* (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
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*
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* This driver is based on work from Andreas Busse, but most of
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* the code is rewritten.
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*
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* (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
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*
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* A driver for the onboard Sonic ethernet controller on Mips Jazz
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* systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and
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* perhaps others, too)
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/fcntl.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/in.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/errno.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/bitops.h>
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#include <linux/device.h>
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#include <asm/bootinfo.h>
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#include <asm/system.h>
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#include <asm/pgtable.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/jazz.h>
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#include <asm/jazzdma.h>
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static char jazz_sonic_string[] = "jazzsonic";
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static struct platform_device *jazz_sonic_device;
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#define SONIC_MEM_SIZE 0x100
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#define SREGS_PAD(n) u16 n;
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#include "sonic.h"
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/*
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* Macros to access SONIC registers
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*/
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#define SONIC_READ(reg) (*((volatile unsigned int *)base_addr+reg))
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#define SONIC_WRITE(reg,val) \
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do { \
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*((volatile unsigned int *)base_addr+(reg)) = (val); \
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} while (0)
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/* use 0 for production, 1 for verification, >2 for debug */
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#ifdef SONIC_DEBUG
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static unsigned int sonic_debug = SONIC_DEBUG;
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#else
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static unsigned int sonic_debug = 1;
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#endif
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/*
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* Base address and interrupt of the SONIC controller on JAZZ boards
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*/
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static struct {
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unsigned int port;
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unsigned int irq;
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} sonic_portlist[] = { {JAZZ_ETHERNET_BASE, JAZZ_ETHERNET_IRQ}, {0, 0}};
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/*
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* We cannot use station (ethernet) address prefixes to detect the
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* sonic controller since these are board manufacturer depended.
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* So we check for known Silicon Revision IDs instead.
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*/
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static unsigned short known_revisions[] =
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{
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0x04, /* Mips Magnum 4000 */
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0xffff /* end of list */
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};
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static int __init sonic_probe1(struct net_device *dev, unsigned long base_addr,
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unsigned int irq)
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{
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static unsigned version_printed;
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unsigned int silicon_revision;
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unsigned int val;
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struct sonic_local *lp;
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int err = -ENODEV;
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int i;
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if (!request_mem_region(base_addr, SONIC_MEM_SIZE, jazz_sonic_string))
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return -EBUSY;
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/*
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* get the Silicon Revision ID. If this is one of the known
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* one assume that we found a SONIC ethernet controller at
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* the expected location.
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*/
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silicon_revision = SONIC_READ(SONIC_SR);
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if (sonic_debug > 1)
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printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision);
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i = 0;
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while (known_revisions[i] != 0xffff
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&& known_revisions[i] != silicon_revision)
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i++;
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if (known_revisions[i] == 0xffff) {
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printk("SONIC ethernet controller not found (0x%4x)\n",
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silicon_revision);
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goto out;
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}
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if (sonic_debug && version_printed++ == 0)
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printk(version);
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printk("%s: Sonic ethernet found at 0x%08lx, ", dev->name, base_addr);
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/* Fill in the 'dev' fields. */
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dev->base_addr = base_addr;
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dev->irq = irq;
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/*
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* Put the sonic into software reset, then
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* retrieve and print the ethernet address.
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*/
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SONIC_WRITE(SONIC_CMD,SONIC_CR_RST);
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SONIC_WRITE(SONIC_CEP,0);
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for (i=0; i<3; i++) {
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val = SONIC_READ(SONIC_CAP0-i);
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dev->dev_addr[i*2] = val;
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dev->dev_addr[i*2+1] = val >> 8;
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}
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printk("HW Address ");
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for (i = 0; i < 6; i++) {
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printk("%2.2x", dev->dev_addr[i]);
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if (i<5)
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printk(":");
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}
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printk(" IRQ %d\n", irq);
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err = -ENOMEM;
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/* Initialize the device structure. */
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if (dev->priv == NULL) {
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/*
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* the memory be located in the same 64kb segment
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*/
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lp = NULL;
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i = 0;
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do {
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lp = kmalloc(sizeof(*lp), GFP_KERNEL);
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if ((unsigned long) lp >> 16
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!= ((unsigned long)lp + sizeof(*lp) ) >> 16) {
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/* FIXME, free the memory later */
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kfree(lp);
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lp = NULL;
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}
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} while (lp == NULL && i++ < 20);
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if (lp == NULL) {
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printk("%s: couldn't allocate memory for descriptors\n",
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dev->name);
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goto out;
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}
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memset(lp, 0, sizeof(struct sonic_local));
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/* get the virtual dma address */
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lp->cda_laddr = vdma_alloc(CPHYSADDR(lp),sizeof(*lp));
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if (lp->cda_laddr == ~0UL) {
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printk("%s: couldn't get DMA page entry for "
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"descriptors\n", dev->name);
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goto out1;
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}
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lp->tda_laddr = lp->cda_laddr + sizeof (lp->cda);
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lp->rra_laddr = lp->tda_laddr + sizeof (lp->tda);
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lp->rda_laddr = lp->rra_laddr + sizeof (lp->rra);
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/* allocate receive buffer area */
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/* FIXME, maybe we should use skbs */
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lp->rba = kmalloc(SONIC_NUM_RRS * SONIC_RBSIZE, GFP_KERNEL);
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if (!lp->rba) {
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printk("%s: couldn't allocate receive buffers\n",
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dev->name);
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goto out2;
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}
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/* get virtual dma address */
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lp->rba_laddr = vdma_alloc(CPHYSADDR(lp->rba),
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SONIC_NUM_RRS * SONIC_RBSIZE);
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if (lp->rba_laddr == ~0UL) {
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printk("%s: couldn't get DMA page entry for receive "
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"buffers\n",dev->name);
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goto out3;
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}
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/* now convert pointer to KSEG1 pointer */
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lp->rba = (char *)KSEG1ADDR(lp->rba);
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flush_cache_all();
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dev->priv = (struct sonic_local *)KSEG1ADDR(lp);
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}
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lp = (struct sonic_local *)dev->priv;
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dev->open = sonic_open;
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dev->stop = sonic_close;
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dev->hard_start_xmit = sonic_send_packet;
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dev->get_stats = sonic_get_stats;
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dev->set_multicast_list = &sonic_multicast_list;
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dev->watchdog_timeo = TX_TIMEOUT;
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/*
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* clear tally counter
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*/
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SONIC_WRITE(SONIC_CRCT,0xffff);
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SONIC_WRITE(SONIC_FAET,0xffff);
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SONIC_WRITE(SONIC_MPT,0xffff);
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return 0;
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out3:
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kfree(lp->rba);
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out2:
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vdma_free(lp->cda_laddr);
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out1:
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kfree(lp);
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out:
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release_region(base_addr, SONIC_MEM_SIZE);
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return err;
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}
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/*
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* Probe for a SONIC ethernet controller on a Mips Jazz board.
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* Actually probing is superfluous but we're paranoid.
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*/
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static int __init jazz_sonic_probe(struct device *device)
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{
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struct net_device *dev;
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struct sonic_local *lp;
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unsigned long base_addr;
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int err = 0;
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int i;
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/*
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* Don't probe if we're not running on a Jazz board.
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*/
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if (mips_machgroup != MACH_GROUP_JAZZ)
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return -ENODEV;
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dev = alloc_etherdev(0);
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if (!dev)
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return -ENOMEM;
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netdev_boot_setup_check(dev);
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base_addr = dev->base_addr;
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if (base_addr >= KSEG0) { /* Check a single specified location. */
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err = sonic_probe1(dev, base_addr, dev->irq);
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} else if (base_addr != 0) { /* Don't probe at all. */
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err = -ENXIO;
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} else {
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for (i = 0; sonic_portlist[i].port; i++) {
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int io = sonic_portlist[i].port;
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if (sonic_probe1(dev, io, sonic_portlist[i].irq) == 0)
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break;
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}
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if (!sonic_portlist[i].port)
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err = -ENODEV;
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}
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if (err)
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goto out;
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err = register_netdev(dev);
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if (err)
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goto out1;
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return 0;
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out1:
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lp = dev->priv;
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vdma_free(lp->rba_laddr);
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kfree(lp->rba);
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vdma_free(lp->cda_laddr);
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kfree(lp);
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release_region(dev->base_addr, SONIC_MEM_SIZE);
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out:
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free_netdev(dev);
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return err;
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}
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/*
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* SONIC uses a normal IRQ
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*/
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#define sonic_request_irq request_irq
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#define sonic_free_irq free_irq
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#define sonic_chiptomem(x) KSEG1ADDR(vdma_log2phys(x))
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#include "sonic.c"
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static int __devexit jazz_sonic_device_remove (struct device *device)
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{
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struct net_device *dev = device->driver_data;
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unregister_netdev (dev);
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release_region (dev->base_addr, SONIC_MEM_SIZE);
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free_netdev (dev);
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return 0;
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}
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static struct device_driver jazz_sonic_driver = {
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.name = jazz_sonic_string,
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.bus = &platform_bus_type,
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.probe = jazz_sonic_probe,
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.remove = __devexit_p(jazz_sonic_device_remove),
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};
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static void jazz_sonic_platform_release (struct device *device)
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{
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struct platform_device *pldev;
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/* free device */
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pldev = to_platform_device (device);
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kfree (pldev);
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}
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static int __init jazz_sonic_init_module(void)
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{
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struct platform_device *pldev;
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if (driver_register(&jazz_sonic_driver)) {
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printk(KERN_ERR "Driver registration failed\n");
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return -ENOMEM;
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}
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jazz_sonic_device = NULL;
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if (!(pldev = kmalloc (sizeof (*pldev), GFP_KERNEL))) {
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goto out_unregister;
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}
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memset(pldev, 0, sizeof (*pldev));
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pldev->name = jazz_sonic_string;
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pldev->id = 0;
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pldev->dev.release = jazz_sonic_platform_release;
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jazz_sonic_device = pldev;
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if (platform_device_register (pldev)) {
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kfree(pldev);
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jazz_sonic_device = NULL;
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}
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return 0;
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out_unregister:
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platform_device_unregister(pldev);
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return -ENOMEM;
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}
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static void __exit jazz_sonic_cleanup_module(void)
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{
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driver_unregister(&jazz_sonic_driver);
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if (jazz_sonic_device) {
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platform_device_unregister(jazz_sonic_device);
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jazz_sonic_device = NULL;
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}
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}
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module_init(jazz_sonic_init_module);
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module_exit(jazz_sonic_cleanup_module);
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