| /* |
| * 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"; |
| static struct platform_device *jazz_sonic_device; |
| |
| #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 |
| |
| /* |
| * 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) |
| { |
| 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, ", lp->device->bus_id, 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", lp->device->bus_id); |
| 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 = 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->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; |
| 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(sizeof(struct sonic_local)); |
| if (!dev) |
| return -ENOMEM; |
| |
| lp = netdev_priv(dev); |
| lp->device = &pdev->dev; |
| SET_NETDEV_DEV(dev, &pdev->dev); |
| SET_MODULE_OWNER(dev); |
| |
| netdev_boot_setup_check(dev); |
| |
| if (dev->base_addr >= KSEG0) { /* Check a single specified location. */ |
| err = sonic_probe1(dev); |
| } else if (dev->base_addr != 0) { /* Don't probe at all. */ |
| err = -ENXIO; |
| } else { |
| for (i = 0; sonic_portlist[i].port; i++) { |
| dev->base_addr = sonic_portlist[i].port; |
| dev->irq = sonic_portlist[i].irq; |
| if (sonic_probe1(dev) == 0) |
| break; |
| } |
| if (!sonic_portlist[i].port) |
| err = -ENODEV; |
| } |
| if (err) |
| goto out; |
| err = register_netdev(dev); |
| if (err) |
| goto out1; |
| |
| printk("%s: MAC ", dev->name); |
| for (i = 0; i < 6; i++) { |
| printk("%2.2x", dev->dev_addr[i]); |
| if (i < 5) |
| printk(":"); |
| } |
| printk(" IRQ %d\n", 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)"); |
| |
| #define SONIC_IRQ_FLAG SA_INTERRUPT |
| |
| #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, |
| }, |
| }; |
| |
| static int __init jazz_sonic_init_module(void) |
| { |
| int err; |
| |
| if ((err = platform_driver_register(&jazz_sonic_driver))) { |
| printk(KERN_ERR "Driver registration failed\n"); |
| return err; |
| } |
| |
| jazz_sonic_device = platform_device_alloc(jazz_sonic_string, 0); |
| if (!jazz_sonic_device) |
| goto out_unregister; |
| |
| if (platform_device_add(jazz_sonic_device)) { |
| platform_device_put(jazz_sonic_device); |
| jazz_sonic_device = NULL; |
| } |
| |
| return 0; |
| |
| out_unregister: |
| platform_driver_unregister(&jazz_sonic_driver); |
| |
| return -ENOMEM; |
| } |
| |
| static void __exit jazz_sonic_cleanup_module(void) |
| { |
| platform_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); |