/* * 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/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/platform_device.h> #include <linux/dma-mapping.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"; #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) { if (request_irq(dev->irq, &sonic_interrupt, IRQF_DISABLED, "sonic", dev)) { printk(KERN_ERR "%s: unable to get IRQ %d.\n", dev->name, dev->irq); return -EAGAIN; } return sonic_open(dev); } static int jazzsonic_close(struct net_device* dev) { int err; err = sonic_close(dev); free_irq(dev->irq, dev); return err; } static int __init 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. */ if ((lp->descriptors = dma_alloc_coherent(lp->device, SIZEOF_SONIC_DESC * SONIC_BUS_SCALE(lp->dma_bitmode), &lp->descriptors_laddr, GFP_KERNEL)) == NULL) { printk(KERN_ERR "%s: couldn't alloc DMA memory for descriptors.\n", dev_name(lp->device)); 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->open = jazzsonic_open; dev->stop = jazzsonic_close; dev->hard_start_xmit = sonic_send_packet; dev->get_stats = sonic_get_stats; dev->set_multicast_list = &sonic_multicast_list; dev->tx_timeout = sonic_tx_timeout; 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_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 __init 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); 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_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 __devexit 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_region (dev->base_addr, SONIC_MEM_SIZE); free_netdev(dev); return 0; } static struct platform_driver jazz_sonic_driver = { .probe = jazz_sonic_probe, .remove = __devexit_p(jazz_sonic_device_remove), .driver = { .name = jazz_sonic_string, .owner = THIS_MODULE, }, }; static int __init jazz_sonic_init_module(void) { return platform_driver_register(&jazz_sonic_driver); } static void __exit jazz_sonic_cleanup_module(void) { platform_driver_unregister(&jazz_sonic_driver); } module_init(jazz_sonic_init_module); module_exit(jazz_sonic_cleanup_module);