diff options
Diffstat (limited to 'kernel/drivers/net/ethernet/natsemi/jazzsonic.c')
| -rw-r--r-- | kernel/drivers/net/ethernet/natsemi/jazzsonic.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/kernel/drivers/net/ethernet/natsemi/jazzsonic.c b/kernel/drivers/net/ethernet/natsemi/jazzsonic.c new file mode 100644 index 000000000..acf3f11e3 --- /dev/null +++ b/kernel/drivers/net/ethernet/natsemi/jazzsonic.c @@ -0,0 +1,293 @@ +/* + * jazzsonic.c + * + * (C) 2005 Finn Thain + * + * Converted to DMA API, and (from the mac68k project) introduced + * dhd's support for 16-bit cards. + * + * (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/gfp.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/in.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/platform_device.h> +#include <linux/dma-mapping.h> +#include <linux/slab.h> + +#include <asm/bootinfo.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"; + +#define SONIC_MEM_SIZE 0x100 + +#include "sonic.h" + +/* + * Macros to access SONIC registers + */ +#define SONIC_READ(reg) (*((volatile unsigned int *)dev->base_addr+reg)) + +#define SONIC_WRITE(reg,val) \ +do { \ + *((volatile unsigned int *)dev->base_addr+(reg)) = (val); \ +} while (0) + + +/* use 0 for production, 1 for verification, >1 for debug */ +#ifdef SONIC_DEBUG +static unsigned int sonic_debug = SONIC_DEBUG; +#else +static unsigned int sonic_debug = 1; +#endif + +/* + * 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 jazzsonic_open(struct net_device* dev) +{ + int retval; + + retval = request_irq(dev->irq, sonic_interrupt, 0, "sonic", dev); + if (retval) { + printk(KERN_ERR "%s: unable to get IRQ %d.\n", + dev->name, dev->irq); + return retval; + } + + retval = sonic_open(dev); + if (retval) + free_irq(dev->irq, dev); + return retval; +} + +static int jazzsonic_close(struct net_device* dev) +{ + int err; + err = sonic_close(dev); + free_irq(dev->irq, dev); + return err; +} + +static const struct net_device_ops sonic_netdev_ops = { + .ndo_open = jazzsonic_open, + .ndo_stop = jazzsonic_close, + .ndo_start_xmit = sonic_send_packet, + .ndo_get_stats = sonic_get_stats, + .ndo_set_rx_mode = sonic_multicast_list, + .ndo_tx_timeout = sonic_tx_timeout, + .ndo_change_mtu = eth_change_mtu, + .ndo_validate_addr = eth_validate_addr, + .ndo_set_mac_address = eth_mac_addr, +}; + +static int sonic_probe1(struct net_device *dev) +{ + static unsigned version_printed; + unsigned int silicon_revision; + unsigned int val; + struct sonic_local *lp = netdev_priv(dev); + int err = -ENODEV; + int i; + + if (!request_mem_region(dev->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(KERN_INFO "%s: Sonic ethernet found at 0x%08lx, ", + dev_name(lp->device), dev->base_addr); + + /* + * 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; + } + + err = -ENOMEM; + + /* Initialize the device structure. */ + + lp->dma_bitmode = SONIC_BITMODE32; + + /* Allocate the entire chunk of memory for the descriptors. + Note that this cannot cross a 64K boundary. */ + lp->descriptors = dma_alloc_coherent(lp->device, + SIZEOF_SONIC_DESC * + SONIC_BUS_SCALE(lp->dma_bitmode), + &lp->descriptors_laddr, + GFP_KERNEL); + if (lp->descriptors == NULL) + goto out; + + /* Now set up the pointers to point to the appropriate places */ + lp->cda = lp->descriptors; + lp->tda = lp->cda + (SIZEOF_SONIC_CDA + * SONIC_BUS_SCALE(lp->dma_bitmode)); + lp->rda = lp->tda + (SIZEOF_SONIC_TD * SONIC_NUM_TDS + * SONIC_BUS_SCALE(lp->dma_bitmode)); + lp->rra = lp->rda + (SIZEOF_SONIC_RD * SONIC_NUM_RDS + * SONIC_BUS_SCALE(lp->dma_bitmode)); + + lp->cda_laddr = lp->descriptors_laddr; + lp->tda_laddr = lp->cda_laddr + (SIZEOF_SONIC_CDA + * SONIC_BUS_SCALE(lp->dma_bitmode)); + lp->rda_laddr = lp->tda_laddr + (SIZEOF_SONIC_TD * SONIC_NUM_TDS + * SONIC_BUS_SCALE(lp->dma_bitmode)); + lp->rra_laddr = lp->rda_laddr + (SIZEOF_SONIC_RD * SONIC_NUM_RDS + * SONIC_BUS_SCALE(lp->dma_bitmode)); + + dev->netdev_ops = &sonic_netdev_ops; + 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; +out: + release_mem_region(dev->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 jazz_sonic_probe(struct platform_device *pdev) +{ + struct net_device *dev; + struct sonic_local *lp; + struct resource *res; + int err = 0; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + dev = alloc_etherdev(sizeof(struct sonic_local)); + if (!dev) + return -ENOMEM; + + lp = netdev_priv(dev); + lp->device = &pdev->dev; + SET_NETDEV_DEV(dev, &pdev->dev); + platform_set_drvdata(pdev, dev); + + netdev_boot_setup_check(dev); + + dev->base_addr = res->start; + dev->irq = platform_get_irq(pdev, 0); + err = sonic_probe1(dev); + if (err) + goto out; + err = register_netdev(dev); + if (err) + goto out1; + + printk("%s: MAC %pM IRQ %d\n", dev->name, dev->dev_addr, dev->irq); + + return 0; + +out1: + release_mem_region(dev->base_addr, SONIC_MEM_SIZE); +out: + free_netdev(dev); + + return err; +} + +MODULE_DESCRIPTION("Jazz SONIC ethernet driver"); +module_param(sonic_debug, int, 0); +MODULE_PARM_DESC(sonic_debug, "jazzsonic debug level (1-4)"); +MODULE_ALIAS("platform:jazzsonic"); + +#include "sonic.c" + +static int jazz_sonic_device_remove(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct sonic_local* lp = netdev_priv(dev); + + unregister_netdev(dev); + dma_free_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), + lp->descriptors, lp->descriptors_laddr); + release_mem_region(dev->base_addr, SONIC_MEM_SIZE); + free_netdev(dev); + + return 0; +} + +static struct platform_driver jazz_sonic_driver = { + .probe = jazz_sonic_probe, + .remove = jazz_sonic_device_remove, + .driver = { + .name = jazz_sonic_string, + }, +}; + +module_platform_driver(jazz_sonic_driver); |