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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/jazzsonic.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/net/jazzsonic.c')
-rw-r--r-- | drivers/net/jazzsonic.c | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/drivers/net/jazzsonic.c b/drivers/net/jazzsonic.c new file mode 100644 index 0000000..7fec613 --- /dev/null +++ b/drivers/net/jazzsonic.c @@ -0,0 +1,381 @@ +/* + * sonic.c + * + * (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de) + * + * This driver is based on work from Andreas Busse, but most of + * the code is rewritten. + * + * (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de) + * + * A driver for the onboard Sonic ethernet controller on Mips Jazz + * systems (Acer Pica-61, Mips Magnum 4000, Olivetti M700 and + * perhaps others, too) + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/fcntl.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/bitops.h> +#include <linux/device.h> + +#include <asm/bootinfo.h> +#include <asm/system.h> +#include <asm/pgtable.h> +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/jazz.h> +#include <asm/jazzdma.h> + +static char jazz_sonic_string[] = "jazzsonic"; +static struct platform_device *jazz_sonic_device; + +#define SONIC_MEM_SIZE 0x100 + +#define SREGS_PAD(n) u16 n; + +#include "sonic.h" + +/* + * Macros to access SONIC registers + */ +#define SONIC_READ(reg) (*((volatile unsigned int *)base_addr+reg)) + +#define SONIC_WRITE(reg,val) \ +do { \ + *((volatile unsigned int *)base_addr+(reg)) = (val); \ +} while (0) + + +/* use 0 for production, 1 for verification, >2 for debug */ +#ifdef SONIC_DEBUG +static unsigned int sonic_debug = SONIC_DEBUG; +#else +static unsigned int sonic_debug = 1; +#endif + +/* + * Base address and interrupt of the SONIC controller on JAZZ boards + */ +static struct { + unsigned int port; + unsigned int irq; +} sonic_portlist[] = { {JAZZ_ETHERNET_BASE, JAZZ_ETHERNET_IRQ}, {0, 0}}; + +/* + * We cannot use station (ethernet) address prefixes to detect the + * sonic controller since these are board manufacturer depended. + * So we check for known Silicon Revision IDs instead. + */ +static unsigned short known_revisions[] = +{ + 0x04, /* Mips Magnum 4000 */ + 0xffff /* end of list */ +}; + +static int __init sonic_probe1(struct net_device *dev, unsigned long base_addr, + unsigned int irq) +{ + static unsigned version_printed; + unsigned int silicon_revision; + unsigned int val; + struct sonic_local *lp; + int err = -ENODEV; + int i; + + if (!request_mem_region(base_addr, SONIC_MEM_SIZE, jazz_sonic_string)) + return -EBUSY; + /* + * get the Silicon Revision ID. If this is one of the known + * one assume that we found a SONIC ethernet controller at + * the expected location. + */ + silicon_revision = SONIC_READ(SONIC_SR); + if (sonic_debug > 1) + printk("SONIC Silicon Revision = 0x%04x\n",silicon_revision); + + i = 0; + while (known_revisions[i] != 0xffff + && known_revisions[i] != silicon_revision) + i++; + + if (known_revisions[i] == 0xffff) { + printk("SONIC ethernet controller not found (0x%4x)\n", + silicon_revision); + goto out; + } + + if (sonic_debug && version_printed++ == 0) + printk(version); + + printk("%s: Sonic ethernet found at 0x%08lx, ", dev->name, base_addr); + + /* Fill in the 'dev' fields. */ + dev->base_addr = base_addr; + dev->irq = irq; + + /* + * Put the sonic into software reset, then + * retrieve and print the ethernet address. + */ + SONIC_WRITE(SONIC_CMD,SONIC_CR_RST); + SONIC_WRITE(SONIC_CEP,0); + for (i=0; i<3; i++) { + val = SONIC_READ(SONIC_CAP0-i); + dev->dev_addr[i*2] = val; + dev->dev_addr[i*2+1] = val >> 8; + } + + printk("HW Address "); + for (i = 0; i < 6; i++) { + printk("%2.2x", dev->dev_addr[i]); + if (i<5) + printk(":"); + } + + printk(" IRQ %d\n", irq); + + err = -ENOMEM; + + /* Initialize the device structure. */ + if (dev->priv == NULL) { + /* + * the memory be located in the same 64kb segment + */ + lp = NULL; + i = 0; + do { + lp = kmalloc(sizeof(*lp), GFP_KERNEL); + if ((unsigned long) lp >> 16 + != ((unsigned long)lp + sizeof(*lp) ) >> 16) { + /* FIXME, free the memory later */ + kfree(lp); + lp = NULL; + } + } while (lp == NULL && i++ < 20); + + if (lp == NULL) { + printk("%s: couldn't allocate memory for descriptors\n", + dev->name); + goto out; + } + + memset(lp, 0, sizeof(struct sonic_local)); + + /* get the virtual dma address */ + lp->cda_laddr = vdma_alloc(CPHYSADDR(lp),sizeof(*lp)); + if (lp->cda_laddr == ~0UL) { + printk("%s: couldn't get DMA page entry for " + "descriptors\n", dev->name); + goto out1; + } + + lp->tda_laddr = lp->cda_laddr + sizeof (lp->cda); + lp->rra_laddr = lp->tda_laddr + sizeof (lp->tda); + lp->rda_laddr = lp->rra_laddr + sizeof (lp->rra); + + /* allocate receive buffer area */ + /* FIXME, maybe we should use skbs */ + lp->rba = kmalloc(SONIC_NUM_RRS * SONIC_RBSIZE, GFP_KERNEL); + if (!lp->rba) { + printk("%s: couldn't allocate receive buffers\n", + dev->name); + goto out2; + } + + /* get virtual dma address */ + lp->rba_laddr = vdma_alloc(CPHYSADDR(lp->rba), + SONIC_NUM_RRS * SONIC_RBSIZE); + if (lp->rba_laddr == ~0UL) { + printk("%s: couldn't get DMA page entry for receive " + "buffers\n",dev->name); + goto out3; + } + + /* now convert pointer to KSEG1 pointer */ + lp->rba = (char *)KSEG1ADDR(lp->rba); + flush_cache_all(); + dev->priv = (struct sonic_local *)KSEG1ADDR(lp); + } + + lp = (struct sonic_local *)dev->priv; + dev->open = sonic_open; + dev->stop = sonic_close; + dev->hard_start_xmit = sonic_send_packet; + dev->get_stats = sonic_get_stats; + dev->set_multicast_list = &sonic_multicast_list; + dev->watchdog_timeo = TX_TIMEOUT; + + /* + * clear tally counter + */ + SONIC_WRITE(SONIC_CRCT,0xffff); + SONIC_WRITE(SONIC_FAET,0xffff); + SONIC_WRITE(SONIC_MPT,0xffff); + + return 0; +out3: + kfree(lp->rba); +out2: + vdma_free(lp->cda_laddr); +out1: + kfree(lp); +out: + release_region(base_addr, SONIC_MEM_SIZE); + return err; +} + +/* + * Probe for a SONIC ethernet controller on a Mips Jazz board. + * Actually probing is superfluous but we're paranoid. + */ +static int __init jazz_sonic_probe(struct device *device) +{ + struct net_device *dev; + struct sonic_local *lp; + unsigned long base_addr; + int err = 0; + int i; + + /* + * Don't probe if we're not running on a Jazz board. + */ + if (mips_machgroup != MACH_GROUP_JAZZ) + return -ENODEV; + + dev = alloc_etherdev(0); + if (!dev) + return -ENOMEM; + + netdev_boot_setup_check(dev); + base_addr = dev->base_addr; + + if (base_addr >= KSEG0) { /* Check a single specified location. */ + err = sonic_probe1(dev, base_addr, dev->irq); + } else if (base_addr != 0) { /* Don't probe at all. */ + err = -ENXIO; + } else { + for (i = 0; sonic_portlist[i].port; i++) { + int io = sonic_portlist[i].port; + if (sonic_probe1(dev, io, sonic_portlist[i].irq) == 0) + break; + } + if (!sonic_portlist[i].port) + err = -ENODEV; + } + if (err) + goto out; + err = register_netdev(dev); + if (err) + goto out1; + + return 0; + +out1: + lp = dev->priv; + vdma_free(lp->rba_laddr); + kfree(lp->rba); + vdma_free(lp->cda_laddr); + kfree(lp); + release_region(dev->base_addr, SONIC_MEM_SIZE); +out: + free_netdev(dev); + + return err; +} + +/* + * SONIC uses a normal IRQ + */ +#define sonic_request_irq request_irq +#define sonic_free_irq free_irq + +#define sonic_chiptomem(x) KSEG1ADDR(vdma_log2phys(x)) + +#include "sonic.c" + +static int __devexit jazz_sonic_device_remove (struct device *device) +{ + struct net_device *dev = device->driver_data; + + unregister_netdev (dev); + release_region (dev->base_addr, SONIC_MEM_SIZE); + free_netdev (dev); + + return 0; +} + +static struct device_driver jazz_sonic_driver = { + .name = jazz_sonic_string, + .bus = &platform_bus_type, + .probe = jazz_sonic_probe, + .remove = __devexit_p(jazz_sonic_device_remove), +}; + +static void jazz_sonic_platform_release (struct device *device) +{ + struct platform_device *pldev; + + /* free device */ + pldev = to_platform_device (device); + kfree (pldev); +} + +static int __init jazz_sonic_init_module(void) +{ + struct platform_device *pldev; + + if (driver_register(&jazz_sonic_driver)) { + printk(KERN_ERR "Driver registration failed\n"); + return -ENOMEM; + } + + jazz_sonic_device = NULL; + + if (!(pldev = kmalloc (sizeof (*pldev), GFP_KERNEL))) { + goto out_unregister; + } + + memset(pldev, 0, sizeof (*pldev)); + pldev->name = jazz_sonic_string; + pldev->id = 0; + pldev->dev.release = jazz_sonic_platform_release; + jazz_sonic_device = pldev; + + if (platform_device_register (pldev)) { + kfree(pldev); + jazz_sonic_device = NULL; + } + + return 0; + +out_unregister: + platform_device_unregister(pldev); + + return -ENOMEM; +} + +static void __exit jazz_sonic_cleanup_module(void) +{ + driver_unregister(&jazz_sonic_driver); + + if (jazz_sonic_device) { + platform_device_unregister(jazz_sonic_device); + jazz_sonic_device = NULL; + } +} + +module_init(jazz_sonic_init_module); +module_exit(jazz_sonic_cleanup_module); |