diff options
Diffstat (limited to 'target/linux/atheros/files/drivers/net/ar2313/ar2313.c')
| -rw-r--r-- | target/linux/atheros/files/drivers/net/ar2313/ar2313.c | 1409 |
1 files changed, 0 insertions, 1409 deletions
diff --git a/target/linux/atheros/files/drivers/net/ar2313/ar2313.c b/target/linux/atheros/files/drivers/net/ar2313/ar2313.c deleted file mode 100644 index 727d190b37..0000000000 --- a/target/linux/atheros/files/drivers/net/ar2313/ar2313.c +++ /dev/null @@ -1,1409 +0,0 @@ -/* - * ar2313.c: Linux driver for the Atheros AR231x Ethernet device. - * - * Copyright (C) 2004 by Sameer Dekate <sdekate@arubanetworks.com> - * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> - * Copyright (C) 2006-2007 Felix Fietkau <nbd@openwrt.org> - * - * Thanks to Atheros for providing hardware and documentation - * enabling me to write this driver. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * Additional credits: - * This code is taken from John Taylor's Sibyte driver and then - * modified for the AR2313. - */ - -#include <linux/autoconf.h> -#include <linux/module.h> -#include <linux/version.h> -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/ioport.h> -#include <linux/pci.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/mm.h> -#include <linux/highmem.h> -#include <linux/sockios.h> -#include <linux/pkt_sched.h> -#include <linux/compile.h> -#include <linux/mii.h> -#include <linux/phy.h> -#include <linux/ethtool.h> -#include <linux/ctype.h> -#include <linux/platform_device.h> - -#include <net/sock.h> -#include <net/ip.h> - -#include <asm/system.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/byteorder.h> -#include <asm/uaccess.h> -#include <asm/bootinfo.h> - -#define AR2313_MTU 1692 -#define AR2313_PRIOS 1 -#define AR2313_QUEUES (2*AR2313_PRIOS) -#define AR2313_DESCR_ENTRIES 64 - -#undef INDEX_DEBUG -#define DEBUG 0 -#define DEBUG_TX 0 -#define DEBUG_RX 0 -#define DEBUG_INT 0 -#define DEBUG_MC 0 -#define DEBUG_ERR 1 - -#ifndef min -#define min(a,b) (((a)<(b))?(a):(b)) -#endif - -#ifndef SMP_CACHE_BYTES -#define SMP_CACHE_BYTES L1_CACHE_BYTES -#endif - -#define AR2313_MBOX_SET_BIT 0x8 - -#define BOARD_IDX_STATIC 0 -#define BOARD_IDX_OVERFLOW -1 - -#include "dma.h" -#include "ar2313.h" - -/* - * New interrupt handler strategy: - * - * An old interrupt handler worked using the traditional method of - * replacing an skbuff with a new one when a packet arrives. However - * the rx rings do not need to contain a static number of buffer - * descriptors, thus it makes sense to move the memory allocation out - * of the main interrupt handler and do it in a bottom half handler - * and only allocate new buffers when the number of buffers in the - * ring is below a certain threshold. In order to avoid starving the - * NIC under heavy load it is however necessary to force allocation - * when hitting a minimum threshold. The strategy for alloction is as - * follows: - * - * RX_LOW_BUF_THRES - allocate buffers in the bottom half - * RX_PANIC_LOW_THRES - we are very low on buffers, allocate - * the buffers in the interrupt handler - * RX_RING_THRES - maximum number of buffers in the rx ring - * - * One advantagous side effect of this allocation approach is that the - * entire rx processing can be done without holding any spin lock - * since the rx rings and registers are totally independent of the tx - * ring and its registers. This of course includes the kmalloc's of - * new skb's. Thus start_xmit can run in parallel with rx processing - * and the memory allocation on SMP systems. - * - * Note that running the skb reallocation in a bottom half opens up - * another can of races which needs to be handled properly. In - * particular it can happen that the interrupt handler tries to run - * the reallocation while the bottom half is either running on another - * CPU or was interrupted on the same CPU. To get around this the - * driver uses bitops to prevent the reallocation routines from being - * reentered. - * - * TX handling can also be done without holding any spin lock, wheee - * this is fun! since tx_csm is only written to by the interrupt - * handler. - */ - -/* - * Threshold values for RX buffer allocation - the low water marks for - * when to start refilling the rings are set to 75% of the ring - * sizes. It seems to make sense to refill the rings entirely from the - * intrrupt handler once it gets below the panic threshold, that way - * we don't risk that the refilling is moved to another CPU when the - * one running the interrupt handler just got the slab code hot in its - * cache. - */ -#define RX_RING_SIZE AR2313_DESCR_ENTRIES -#define RX_PANIC_THRES (RX_RING_SIZE/4) -#define RX_LOW_THRES ((3*RX_RING_SIZE)/4) -#define CRC_LEN 4 -#define RX_OFFSET 2 - -#if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE) -#define VLAN_HDR 4 -#else -#define VLAN_HDR 0 -#endif - -#define AR2313_BUFSIZE (AR2313_MTU + VLAN_HDR + ETH_HLEN + CRC_LEN + RX_OFFSET) - -#ifdef MODULE -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Sameer Dekate <sdekate@arubanetworks.com>, Imre Kaloz <kaloz@openwrt.org>, Felix Fietkau <nbd@openwrt.org>"); -MODULE_DESCRIPTION("AR2313 Ethernet driver"); -#endif - -#define virt_to_phys(x) ((u32)(x) & 0x1fffffff) - -// prototypes -#ifdef TX_TIMEOUT -static void ar2313_tx_timeout(struct net_device *dev); -#endif -static void ar2313_halt(struct net_device *dev); -static void rx_tasklet_func(unsigned long data); -static void rx_tasklet_cleanup(struct net_device *dev); -static void ar2313_multicast_list(struct net_device *dev); - -static int mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum); -static int mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, u16 value); -static int mdiobus_reset(struct mii_bus *bus); -static int mdiobus_probe (struct net_device *dev); -static void ar2313_adjust_link(struct net_device *dev); - -#ifndef ERR -#define ERR(fmt, args...) printk("%s: " fmt, __func__, ##args) -#endif - - -int __init ar2313_probe(struct platform_device *pdev) -{ - struct net_device *dev; - struct ar2313_private *sp; - struct resource *res; - unsigned long ar_eth_base; - char buf[64]; - - dev = alloc_etherdev(sizeof(struct ar2313_private)); - - if (dev == NULL) { - printk(KERN_ERR - "ar2313: Unable to allocate net_device structure!\n"); - return -ENOMEM; - } - - platform_set_drvdata(pdev, dev); - - sp = netdev_priv(dev); - sp->dev = dev; - sp->cfg = pdev->dev.platform_data; - - sprintf(buf, "eth%d_membase", pdev->id); - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, buf); - if (!res) - return -ENODEV; - - sp->link = 0; - ar_eth_base = res->start; - sp->phy = sp->cfg->phy; - - sprintf(buf, "eth%d_irq", pdev->id); - dev->irq = platform_get_irq_byname(pdev, buf); - - spin_lock_init(&sp->lock); - - /* initialize func pointers */ - dev->open = &ar2313_open; - dev->stop = &ar2313_close; - dev->hard_start_xmit = &ar2313_start_xmit; - - dev->set_multicast_list = &ar2313_multicast_list; -#ifdef TX_TIMEOUT - dev->tx_timeout = ar2313_tx_timeout; - dev->watchdog_timeo = AR2313_TX_TIMEOUT; -#endif - dev->do_ioctl = &ar2313_ioctl; - - // SAMEER: do we need this? - dev->features |= NETIF_F_HIGHDMA; - - tasklet_init(&sp->rx_tasklet, rx_tasklet_func, (unsigned long) dev); - tasklet_disable(&sp->rx_tasklet); - - sp->eth_regs = - ioremap_nocache(virt_to_phys(ar_eth_base), sizeof(*sp->eth_regs)); - if (!sp->eth_regs) { - printk("Can't remap eth registers\n"); - return (-ENXIO); - } - - /* - * When there's only one MAC, PHY regs are typically on ENET0, - * even though the MAC might be on ENET1. - * Needto remap PHY regs separately in this case - */ - if (virt_to_phys(ar_eth_base) == virt_to_phys(sp->phy_regs)) - sp->phy_regs = sp->eth_regs; - else { - sp->phy_regs = - ioremap_nocache(virt_to_phys(sp->cfg->phy_base), - sizeof(*sp->phy_regs)); - if (!sp->phy_regs) { - printk("Can't remap phy registers\n"); - return (-ENXIO); - } - } - - sp->dma_regs = - ioremap_nocache(virt_to_phys(ar_eth_base + 0x1000), - sizeof(*sp->dma_regs)); - dev->base_addr = (unsigned int) sp->dma_regs; - if (!sp->dma_regs) { - printk("Can't remap DMA registers\n"); - return (-ENXIO); - } - - sp->int_regs = ioremap_nocache(virt_to_phys(sp->cfg->reset_base), 4); - if (!sp->int_regs) { - printk("Can't remap INTERRUPT registers\n"); - return (-ENXIO); - } - - strncpy(sp->name, "Atheros AR231x", sizeof(sp->name) - 1); - sp->name[sizeof(sp->name) - 1] = '\0'; - memcpy(dev->dev_addr, sp->cfg->macaddr, 6); - sp->board_idx = BOARD_IDX_STATIC; - - if (ar2313_init(dev)) { - /* - * ar2313_init() calls ar2313_init_cleanup() on error. - */ - kfree(dev); - return -ENODEV; - } - - if (register_netdev(dev)) { - printk("%s: register_netdev failed\n", __func__); - return -1; - } - - printk("%s: %s: %02x:%02x:%02x:%02x:%02x:%02x, irq %d\n", - dev->name, sp->name, - dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], - dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5], dev->irq); - - sp->mii_bus.priv = dev; - sp->mii_bus.read = mdiobus_read; - sp->mii_bus.write = mdiobus_write; - sp->mii_bus.reset = mdiobus_reset; - sp->mii_bus.name = "ar2313_eth_mii"; - sp->mii_bus.id = 0; - sp->mii_bus.irq = kmalloc(sizeof(int), GFP_KERNEL); - *sp->mii_bus.irq = PHY_POLL; - - mdiobus_register(&sp->mii_bus); - - if (mdiobus_probe(dev) != 0) { - printk(KERN_ERR "ar2313: mdiobus_probe failed"); - rx_tasklet_cleanup(dev); - ar2313_init_cleanup(dev); - unregister_netdev(dev); - kfree(dev); - } else { - /* start link poll timer */ - ar2313_setup_timer(dev); - } - - return 0; -} - -#if 0 -static void ar2313_dump_regs(struct net_device *dev) -{ - unsigned int *ptr, i; - struct ar2313_private *sp = netdev_priv(dev); - - ptr = (unsigned int *) sp->eth_regs; - for (i = 0; i < (sizeof(ETHERNET_STRUCT) / sizeof(unsigned int)); - i++, ptr++) { - printk("ENET: %08x = %08x\n", (int) ptr, *ptr); - } - - ptr = (unsigned int *) sp->dma_regs; - for (i = 0; i < (sizeof(DMA) / sizeof(unsigned int)); i++, ptr++) { - printk("DMA: %08x = %08x\n", (int) ptr, *ptr); - } - - ptr = (unsigned int *) sp->int_regs; - for (i = 0; i < (sizeof(INTERRUPT) / sizeof(unsigned int)); i++, ptr++) { - printk("INT: %08x = %08x\n", (int) ptr, *ptr); - } - - for (i = 0; i < AR2313_DESCR_ENTRIES; i++) { - ar2313_descr_t *td = &sp->tx_ring[i]; - printk("Tx desc %2d: %08x %08x %08x %08x\n", i, - td->status, td->devcs, td->addr, td->descr); - } -} -#endif - -#ifdef TX_TIMEOUT -static void ar2313_tx_timeout(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - unsigned long flags; - -#if DEBUG_TX - printk("Tx timeout\n"); -#endif - spin_lock_irqsave(&sp->lock, flags); - ar2313_restart(dev); - spin_unlock_irqrestore(&sp->lock, flags); -} -#endif - -#if DEBUG_MC -static void printMcList(struct net_device *dev) -{ - struct dev_mc_list *list = dev->mc_list; - int num = 0, i; - while (list) { - printk("%d MC ADDR ", num); - for (i = 0; i < list->dmi_addrlen; i++) { - printk(":%02x", list->dmi_addr[i]); - } - list = list->next; - printk("\n"); - } -} -#endif - -/* - * Set or clear the multicast filter for this adaptor. - * THIS IS ABSOLUTE CRAP, disabled - */ -static void ar2313_multicast_list(struct net_device *dev) -{ - /* - * Always listen to broadcasts and - * treat IFF bits independently - */ - struct ar2313_private *sp = netdev_priv(dev); - unsigned int recognise; - - recognise = sp->eth_regs->mac_control; - - if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */ - recognise |= MAC_CONTROL_PR; - } else { - recognise &= ~MAC_CONTROL_PR; - } - - if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 15)) { -#if DEBUG_MC - printMcList(dev); - printk("%s: all MULTICAST mc_count %d\n", __FUNCTION__, - dev->mc_count); -#endif - recognise |= MAC_CONTROL_PM; /* all multicast */ - } else if (dev->mc_count > 0) { -#if DEBUG_MC - printMcList(dev); - printk("%s: mc_count %d\n", __FUNCTION__, dev->mc_count); -#endif - recognise |= MAC_CONTROL_PM; /* for the time being */ - } -#if DEBUG_MC - printk("%s: setting %08x to %08x\n", __FUNCTION__, (int) sp->eth_regs, - recognise); -#endif - - sp->eth_regs->mac_control = recognise; -} - -static void rx_tasklet_cleanup(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - - /* - * Tasklet may be scheduled. Need to get it removed from the list - * since we're about to free the struct. - */ - - sp->unloading = 1; - tasklet_enable(&sp->rx_tasklet); - tasklet_kill(&sp->rx_tasklet); -} - -static int __exit ar2313_remove(struct platform_device *pdev) -{ - struct net_device *dev = platform_get_drvdata(pdev); - rx_tasklet_cleanup(dev); - ar2313_init_cleanup(dev); - unregister_netdev(dev); - kfree(dev); - return 0; -} - - -/* - * Restart the AR2313 ethernet controller. - */ -static int ar2313_restart(struct net_device *dev) -{ - /* disable interrupts */ - disable_irq(dev->irq); - - /* stop mac */ - ar2313_halt(dev); - - /* initialize */ - ar2313_init(dev); - - /* enable interrupts */ - enable_irq(dev->irq); - - return 0; -} - -static struct platform_driver ar2313_driver = { - .driver.name = "ar531x-eth", - .probe = ar2313_probe, - .remove = ar2313_remove, -}; - -int __init ar2313_module_init(void) -{ - return platform_driver_register(&ar2313_driver); -} - -void __exit ar2313_module_cleanup(void) -{ - platform_driver_unregister(&ar2313_driver); -} - -module_init(ar2313_module_init); -module_exit(ar2313_module_cleanup); - - -static void ar2313_free_descriptors(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - if (sp->rx_ring != NULL) { - kfree((void *) KSEG0ADDR(sp->rx_ring)); - sp->rx_ring = NULL; - sp->tx_ring = NULL; - } -} - - -static int ar2313_allocate_descriptors(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - int size; - int j; - ar2313_descr_t *space; - - if (sp->rx_ring != NULL) { - printk("%s: already done.\n", __FUNCTION__); - return 0; - } - - size = - (sizeof(ar2313_descr_t) * (AR2313_DESCR_ENTRIES * AR2313_QUEUES)); - space = kmalloc(size, GFP_KERNEL); - if (space == NULL) - return 1; - - /* invalidate caches */ - dma_cache_inv((unsigned int) space, size); - - /* now convert pointer to KSEG1 */ - space = (ar2313_descr_t *) KSEG1ADDR(space); - - memset((void *) space, 0, size); - - sp->rx_ring = space; - space += AR2313_DESCR_ENTRIES; - - sp->tx_ring = space; - space += AR2313_DESCR_ENTRIES; - - /* Initialize the transmit Descriptors */ - for (j = 0; j < AR2313_DESCR_ENTRIES; j++) { - ar2313_descr_t *td = &sp->tx_ring[j]; - td->status = 0; - td->devcs = DMA_TX1_CHAINED; - td->addr = 0; - td->descr = - virt_to_phys(&sp-> - tx_ring[(j + 1) & (AR2313_DESCR_ENTRIES - 1)]); - } - - return 0; -} - - -/* - * Generic cleanup handling data allocated during init. Used when the - * module is unloaded or if an error occurs during initialization - */ -static void ar2313_init_cleanup(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - struct sk_buff *skb; - int j; - - ar2313_free_descriptors(dev); - - if (sp->eth_regs) - iounmap((void *) sp->eth_regs); - if (sp->dma_regs) - iounmap((void *) sp->dma_regs); - - if (sp->rx_skb) { - for (j = 0; j < AR2313_DESCR_ENTRIES; j++) { - skb = sp->rx_skb[j]; - if (skb) { - sp->rx_skb[j] = NULL; - dev_kfree_skb(skb); - } - } - kfree(sp->rx_skb); - sp->rx_skb = NULL; - } - - if (sp->tx_skb) { - for (j = 0; j < AR2313_DESCR_ENTRIES; j++) { - skb = sp->tx_skb[j]; - if (skb) { - sp->tx_skb[j] = NULL; - dev_kfree_skb(skb); - } - } - kfree(sp->tx_skb); - sp->tx_skb = NULL; - } -} - -static int ar2313_setup_timer(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - - init_timer(&sp->link_timer); - - sp->link_timer.function = ar2313_link_timer_fn; - sp->link_timer.data = (int) dev; - sp->link_timer.expires = jiffies + HZ; - - add_timer(&sp->link_timer); - return 0; - -} - -static void ar2313_link_timer_fn(unsigned long data) -{ - struct net_device *dev = (struct net_device *) data; - struct ar2313_private *sp = netdev_priv(dev); - - // see if the link status changed - // This was needed to make sure we set the PHY to the - // autonegotiated value of half or full duplex. - ar2313_check_link(dev); - - // Loop faster when we don't have link. - // This was needed to speed up the AP bootstrap time. - if (sp->link == 0) { - mod_timer(&sp->link_timer, jiffies + HZ / 2); - } else { - mod_timer(&sp->link_timer, jiffies + LINK_TIMER); - } -} - -static void ar2313_check_link(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - u16 phyData; - - phyData = mdiobus_read(&sp->mii_bus, sp->phy, MII_BMSR); - if (sp->phyData != phyData) { - if (phyData & BMSR_LSTATUS) { - /* link is present, ready link partner ability to deterine - duplexity */ - int duplex = 0; - u16 reg; - - sp->link = 1; - reg = mdiobus_read(&sp->mii_bus, sp->phy, MII_BMCR); - if (reg & BMCR_ANENABLE) { - /* auto neg enabled */ - reg = mdiobus_read(&sp->mii_bus, sp->phy, MII_LPA); - duplex = (reg & (LPA_100FULL | LPA_10FULL)) ? 1 : 0; - } else { - /* no auto neg, just read duplex config */ - duplex = (reg & BMCR_FULLDPLX) ? 1 : 0; - } - - printk(KERN_INFO "%s: Configuring MAC for %s duplex\n", - dev->name, (duplex) ? "full" : "half"); - - if (duplex) { - /* full duplex */ - sp->eth_regs->mac_control = - ((sp->eth_regs-> - mac_control | MAC_CONTROL_F) & ~MAC_CONTROL_DRO); - } else { - /* half duplex */ - sp->eth_regs->mac_control = - ((sp->eth_regs-> - mac_control | MAC_CONTROL_DRO) & ~MAC_CONTROL_F); - } - } else { - /* no link */ - sp->link = 0; - } - sp->phyData = phyData; - } -} - -static int ar2313_reset_reg(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - unsigned int ethsal, ethsah; - unsigned int flags; - - *sp->int_regs |= sp->cfg->reset_mac; - mdelay(10); - *sp->int_regs &= ~sp->cfg->reset_mac; - mdelay(10); - *sp->int_regs |= sp->cfg->reset_phy; - mdelay(10); - *sp->int_regs &= ~sp->cfg->reset_phy; - mdelay(10); - - sp->dma_regs->bus_mode = (DMA_BUS_MODE_SWR); - mdelay(10); - sp->dma_regs->bus_mode = - ((32 << DMA_BUS_MODE_PBL_SHIFT) | DMA_BUS_MODE_BLE); - - /* enable interrupts */ - sp->dma_regs->intr_ena = (DMA_STATUS_AIS | - DMA_STATUS_NIS | - DMA_STATUS_RI | - DMA_STATUS_TI | DMA_STATUS_FBE); - sp->dma_regs->xmt_base = virt_to_phys(sp->tx_ring); - sp->dma_regs->rcv_base = virt_to_phys(sp->rx_ring); - sp->dma_regs->control = - (DMA_CONTROL_SR | DMA_CONTROL_ST | DMA_CONTROL_SF); - - sp->eth_regs->flow_control = (FLOW_CONTROL_FCE); - sp->eth_regs->vlan_tag = (0x8100); - - /* Enable Ethernet Interface */ - flags = (MAC_CONTROL_TE | /* transmit enable */ - MAC_CONTROL_PM | /* pass mcast */ - MAC_CONTROL_F | /* full duplex */ - MAC_CONTROL_HBD); /* heart beat disabled */ - - if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */ - flags |= MAC_CONTROL_PR; - } - sp->eth_regs->mac_control = flags; - - /* Set all Ethernet station address registers to their initial values */ - ethsah = ((((u_int) (dev->dev_addr[5]) << 8) & (u_int) 0x0000FF00) | - (((u_int) (dev->dev_addr[4]) << 0) & (u_int) 0x000000FF)); - - ethsal = ((((u_int) (dev->dev_addr[3]) << 24) & (u_int) 0xFF000000) | - (((u_int) (dev->dev_addr[2]) << 16) & (u_int) 0x00FF0000) | - (((u_int) (dev->dev_addr[1]) << 8) & (u_int) 0x0000FF00) | - (((u_int) (dev->dev_addr[0]) << 0) & (u_int) 0x000000FF)); - - sp->eth_regs->mac_addr[0] = ethsah; - sp->eth_regs->mac_addr[1] = ethsal; - - mdelay(10); - - return (0); -} - - -static int ar2313_init(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - int ecode = 0; - - /* - * Allocate descriptors - */ - if (ar2313_allocate_descriptors(dev)) { - printk("%s: %s: ar2313_allocate_descriptors failed\n", - dev->name, __FUNCTION__); - ecode = -EAGAIN; - goto init_error; - } - - /* - * Get the memory for the skb rings. - */ - if (sp->rx_skb == NULL) { - sp->rx_skb = - kmalloc(sizeof(struct sk_buff *) * AR2313_DESCR_ENTRIES, - GFP_KERNEL); - if (!(sp->rx_skb)) { - printk("%s: %s: rx_skb kmalloc failed\n", - dev->name, __FUNCTION__); - ecode = -EAGAIN; - goto init_error; - } - } - memset(sp->rx_skb, 0, sizeof(struct sk_buff *) * AR2313_DESCR_ENTRIES); - - if (sp->tx_skb == NULL) { - sp->tx_skb = - kmalloc(sizeof(struct sk_buff *) * AR2313_DESCR_ENTRIES, - GFP_KERNEL); - if (!(sp->tx_skb)) { - printk("%s: %s: tx_skb kmalloc failed\n", - dev->name, __FUNCTION__); - ecode = -EAGAIN; - goto init_error; - } - } - memset(sp->tx_skb, 0, sizeof(struct sk_buff *) * AR2313_DESCR_ENTRIES); - - /* - * Set tx_csm before we start receiving interrupts, otherwise - * the interrupt handler might think it is supposed to process - * tx ints before we are up and running, which may cause a null - * pointer access in the int handler. - */ - sp->rx_skbprd = 0; - sp->cur_rx = 0; - sp->tx_prd = 0; - sp->tx_csm = 0; - - /* - * Zero the stats before starting the interface - */ - memset(&dev->stats, 0, sizeof(dev->stats)); - - /* - * We load the ring here as there seem to be no way to tell the - * firmware to wipe the ring without re-initializing it. - */ - ar2313_load_rx_ring(dev, RX_RING_SIZE); - - /* - * Init hardware - */ - ar2313_reset_reg(dev); - - /* - * Get the IRQ - */ - ecode = - request_irq(dev->irq, &ar2313_interrupt, - IRQF_SHARED | IRQF_DISABLED | IRQF_SAMPLE_RANDOM, - dev->name, dev); - if (ecode) { - printk(KERN_WARNING "%s: %s: Requested IRQ %d is busy\n", - dev->name, __FUNCTION__, dev->irq); - goto init_error; - } - - - tasklet_enable(&sp->rx_tasklet); - - return 0; - - init_error: - ar2313_init_cleanup(dev); - return ecode; -} - -/* - * Load the rx ring. - * - * Loading rings is safe without holding the spin lock since this is - * done only before the device is enabled, thus no interrupts are - * generated and by the interrupt handler/tasklet handler. - */ -static void ar2313_load_rx_ring(struct net_device *dev, int nr_bufs) -{ - - struct ar2313_private *sp = netdev_priv(dev); - short i, idx; - - idx = sp->rx_skbprd; - - for (i = 0; i < nr_bufs; i++) { - struct sk_buff *skb; - ar2313_descr_t *rd; - - if (sp->rx_skb[idx]) { -#if DEBUG_RX - printk(KERN_INFO "ar2313 rx refill full\n"); -#endif /* DEBUG */ - break; - } - // partha: create additional room for the second GRE fragment - skb = alloc_skb(AR2313_BUFSIZE + 128, GFP_ATOMIC); - if (!skb) { - printk("\n\n\n\n %s: No memory in system\n\n\n\n", - __FUNCTION__); - break; - } - // partha: create additional room in the front for tx pkt capture - skb_reserve(skb, 32); - - /* - * Make sure IP header starts on a fresh cache line. - */ - skb->dev = dev; - skb_reserve(skb, RX_OFFSET); - sp->rx_skb[idx] = skb; - - rd = (ar2313_descr_t *) & sp->rx_ring[idx]; - - /* initialize dma descriptor */ - rd->devcs = ((AR2313_BUFSIZE << DMA_RX1_BSIZE_SHIFT) | - DMA_RX1_CHAINED); - rd->addr = virt_to_phys(skb->data); - rd->descr = - virt_to_phys(&sp-> - rx_ring[(idx + 1) & (AR2313_DESCR_ENTRIES - 1)]); - rd->status = DMA_RX_OWN; - - idx = DSC_NEXT(idx); - } - - if (!i) { -#if DEBUG_ERR - printk(KERN_INFO - "Out of memory when allocating standard receive buffers\n"); -#endif /* DEBUG */ - } else { - sp->rx_skbprd = idx; - } - - return; -} - -#define AR2313_MAX_PKTS_PER_CALL 64 - -static int ar2313_rx_int(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - struct sk_buff *skb, *skb_new; - ar2313_descr_t *rxdesc; - unsigned int status; - u32 idx; - int pkts = 0; - int rval; - - idx = sp->cur_rx; - - /* process at most the entire ring and then wait for another interrupt - */ - while (1) { - - rxdesc = &sp->rx_ring[idx]; - status = rxdesc->status; - if (status & DMA_RX_OWN) { - /* SiByte owns descriptor or descr not yet filled in */ - rval = 0; - break; - } - - if (++pkts > AR2313_MAX_PKTS_PER_CALL) { - rval = 1; - break; - } -#if DEBUG_RX - printk("index %d\n", idx); - printk("RX status %08x\n", rxdesc->status); - printk("RX devcs %08x\n", rxdesc->devcs); - printk("RX addr %08x\n", rxdesc->addr); - printk("RX descr %08x\n", rxdesc->descr); -#endif - - if ((status & (DMA_RX_ERROR | DMA_RX_ERR_LENGTH)) && - (!(status & DMA_RX_LONG))) { -#if DEBUG_RX - printk("%s: rx ERROR %08x\n", __FUNCTION__, status); -#endif - dev->stats.rx_errors++; - dev->stats.rx_dropped++; - - /* add statistics counters */ - if (status & DMA_RX_ERR_CRC) - dev->stats.rx_crc_errors++; - if (status & DMA_RX_ERR_COL) - dev->stats.rx_over_errors++; - if (status & DMA_RX_ERR_LENGTH) - dev->stats.rx_length_errors++; - if (status & DMA_RX_ERR_RUNT) - dev->stats.rx_over_errors++; - if (status & DMA_RX_ERR_DESC) - dev->stats.rx_over_errors++; - - } else { - /* alloc new buffer. */ - skb_new = dev_alloc_skb(AR2313_BUFSIZE + RX_OFFSET + 128); - if (skb_new != NULL) { - - skb = sp->rx_skb[idx]; - /* set skb */ - skb_put(skb, - ((status >> DMA_RX_LEN_SHIFT) & 0x3fff) - CRC_LEN); - - dev->stats.rx_bytes += skb->len; - skb->protocol = eth_type_trans(skb, dev); - /* pass the packet to upper layers */ - netif_rx(skb); - - skb_new->dev = dev; - /* 16 bit align */ - skb_reserve(skb_new, RX_OFFSET + 32); - /* reset descriptor's curr_addr */ - rxdesc->addr = virt_to_phys(skb_new->data); - - dev->stats.rx_packets++; - sp->rx_skb[idx] = skb_new; - } else { - dev->stats.rx_dropped++; - } - } - - rxdesc->devcs = ((AR2313_BUFSIZE << DMA_RX1_BSIZE_SHIFT) | - DMA_RX1_CHAINED); - rxdesc->status = DMA_RX_OWN; - - idx = DSC_NEXT(idx); - } - - sp->cur_rx = idx; - - return rval; -} - - -static void ar2313_tx_int(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - u32 idx; - struct sk_buff *skb; - ar2313_descr_t *txdesc; - unsigned int status = 0; - - idx = sp->tx_csm; - - while (idx != sp->tx_prd) { - - txdesc = &sp->tx_ring[idx]; - -#if DEBUG_TX - printk - ("%s: TXINT: csm=%d idx=%d prd=%d status=%x devcs=%x addr=%08x descr=%x\n", - dev->name, sp->tx_csm, idx, sp->tx_prd, txdesc->status, - txdesc->devcs, txdesc->addr, txdesc->descr); -#endif /* DEBUG */ - - if ((status = txdesc->status) & DMA_TX_OWN) { - /* ar2313 dma still owns descr */ - break; - } - /* done with this descriptor */ - dma_unmap_single(NULL, txdesc->addr, - txdesc->devcs & DMA_TX1_BSIZE_MASK, - DMA_TO_DEVICE); - txdesc->status = 0; - - if (status & DMA_TX_ERROR) { - dev->stats.tx_errors++; - dev->stats.tx_dropped++; - if (status & DMA_TX_ERR_UNDER) - dev->stats.tx_fifo_errors++; - if (status & DMA_TX_ERR_HB) - dev->stats.tx_heartbeat_errors++; - if (status & (DMA_TX_ERR_LOSS | DMA_TX_ERR_LINK)) - dev->stats.tx_carrier_errors++; - if (status & (DMA_TX_ERR_LATE | - DMA_TX_ERR_COL | - DMA_TX_ERR_JABBER | DMA_TX_ERR_DEFER)) - dev->stats.tx_aborted_errors++; - } else { - /* transmit OK */ - dev->stats.tx_packets++; - } - - skb = sp->tx_skb[idx]; - sp->tx_skb[idx] = NULL; - idx = DSC_NEXT(idx); - dev->stats.tx_bytes += skb->len; - dev_kfree_skb_irq(skb); - } - - sp->tx_csm = idx; - - return; -} - - -static void rx_tasklet_func(unsigned long data) -{ - struct net_device *dev = (struct net_device *) data; - struct ar2313_private *sp = netdev_priv(dev); - - if (sp->unloading) { - return; - } - - if (ar2313_rx_int(dev)) { - tasklet_hi_schedule(&sp->rx_tasklet); - } else { - unsigned long flags; - spin_lock_irqsave(&sp->lock, flags); - sp->dma_regs->intr_ena |= DMA_STATUS_RI; - spin_unlock_irqrestore(&sp->lock, flags); - } -} - -static void rx_schedule(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - - sp->dma_regs->intr_ena &= ~DMA_STATUS_RI; - - tasklet_hi_schedule(&sp->rx_tasklet); -} - -static irqreturn_t ar2313_interrupt(int irq, void *dev_id) -{ - struct net_device *dev = (struct net_device *) dev_id; - struct ar2313_private *sp = netdev_priv(dev); - unsigned int status, enabled; - - /* clear interrupt */ - /* - * Don't clear RI bit if currently disabled. - */ - status = sp->dma_regs->status; - enabled = sp->dma_regs->intr_ena; - sp->dma_regs->status = status & enabled; - - if (status & DMA_STATUS_NIS) { - /* normal status */ - /* - * Don't schedule rx processing if interrupt - * is already disabled. - */ - if (status & enabled & DMA_STATUS_RI) { - /* receive interrupt */ - rx_schedule(dev); - } - if (status & DMA_STATUS_TI) { - /* transmit interrupt */ - ar2313_tx_int(dev); - } - } - - if (status & DMA_STATUS_AIS) { -#if DEBUG_INT - printk("%s: AIS set %08x & %x\n", __FUNCTION__, - status, (DMA_STATUS_FBE | DMA_STATUS_TPS)); -#endif - /* abnormal status */ - if (status & (DMA_STATUS_FBE | DMA_STATUS_TPS)) { - ar2313_restart(dev); - } - } - return IRQ_HANDLED; -} - - -static int ar2313_open(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - unsigned int ethsal, ethsah; - - /* reset the hardware, in case the MAC address changed */ - ethsah = ((((u_int) (dev->dev_addr[5]) << 8) & (u_int) 0x0000FF00) | - (((u_int) (dev->dev_addr[4]) << 0) & (u_int) 0x000000FF)); - - ethsal = ((((u_int) (dev->dev_addr[3]) << 24) & (u_int) 0xFF000000) | - (((u_int) (dev->dev_addr[2]) << 16) & (u_int) 0x00FF0000) | - (((u_int) (dev->dev_addr[1]) << 8) & (u_int) 0x0000FF00) | - (((u_int) (dev->dev_addr[0]) << 0) & (u_int) 0x000000FF)); - - sp->eth_regs->mac_addr[0] = ethsah; - sp->eth_regs->mac_addr[1] = ethsal; - - mdelay(10); - - dev->mtu = 1500; - netif_start_queue(dev); - - sp->eth_regs->mac_control |= MAC_CONTROL_RE; - - return 0; -} - -static void ar2313_halt(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - int j; - - tasklet_disable(&sp->rx_tasklet); - - /* kill the MAC */ - sp->eth_regs->mac_control &= ~(MAC_CONTROL_RE | /* disable Receives */ - MAC_CONTROL_TE); /* disable Transmits */ - /* stop dma */ - sp->dma_regs->control = 0; - sp->dma_regs->bus_mode = DMA_BUS_MODE_SWR; - - /* place phy and MAC in reset */ - *sp->int_regs |= (sp->cfg->reset_mac | sp->cfg->reset_phy); - - /* free buffers on tx ring */ - for (j = 0; j < AR2313_DESCR_ENTRIES; j++) { - struct sk_buff *skb; - ar2313_descr_t *txdesc; - - txdesc = &sp->tx_ring[j]; - txdesc->descr = 0; - - skb = sp->tx_skb[j]; - if (skb) { - dev_kfree_skb(skb); - sp->tx_skb[j] = NULL; - } - } -} - -/* - * close should do nothing. Here's why. It's called when - * 'ifconfig bond0 down' is run. If it calls free_irq then - * the irq is gone forever ! When bond0 is made 'up' again, - * the ar2313_open () does not call request_irq (). Worse, - * the call to ar2313_halt() generates a WDOG reset due to - * the write to 'sp->int_regs' and the box reboots. - * Commenting this out is good since it allows the - * system to resume when bond0 is made up again. - */ -static int ar2313_close(struct net_device *dev) -{ -#if 0 - /* - * Disable interrupts - */ - disable_irq(dev->irq); - - /* - * Without (or before) releasing irq and stopping hardware, this - * is an absolute non-sense, by the way. It will be reset instantly - * by the first irq. - */ - netif_stop_queue(dev); - - /* stop the MAC and DMA engines */ - ar2313_halt(dev); - - /* release the interrupt */ - free_irq(dev->irq, dev); - -#endif - return 0; -} - -static int ar2313_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - ar2313_descr_t *td; - u32 idx; - - idx = sp->tx_prd; - td = &sp->tx_ring[idx]; - - if (td->status & DMA_TX_OWN) { -#if DEBUG_TX - printk("%s: No space left to Tx\n", __FUNCTION__); -#endif - /* free skbuf and lie to the caller that we sent it out */ - dev->stats.tx_dropped++; - dev_kfree_skb(skb); - - /* restart transmitter in case locked */ - sp->dma_regs->xmt_poll = 0; - return 0; - } - - /* Setup the transmit descriptor. */ - td->devcs = ((skb->len << DMA_TX1_BSIZE_SHIFT) | - (DMA_TX1_LS | DMA_TX1_IC | DMA_TX1_CHAINED)); - td->addr = dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE); - td->status = DMA_TX_OWN; - - /* kick transmitter last */ - sp->dma_regs->xmt_poll = 0; - -#if DEBUG_TX - printk("index %d\n", idx); - printk("TX status %08x\n", td->status); - printk("TX devcs %08x\n", td->devcs); - printk("TX addr %08x\n", td->addr); - printk("TX descr %08x\n", td->descr); -#endif - - sp->tx_skb[idx] = skb; - idx = DSC_NEXT(idx); - sp->tx_prd = idx; - - return 0; -} - -static int ar2313_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) -{ - struct mii_ioctl_data *data = (struct mii_ioctl_data *) &ifr->ifr_data; - struct ar2313_private *sp = netdev_priv(dev); - int ret; - - switch (cmd) { - - case SIOCETHTOOL: - spin_lock_irq(&sp->lock); - ret = phy_ethtool_ioctl(sp->phy_dev, (void *) ifr->ifr_data); - spin_unlock_irq(&sp->lock); - return ret; - - case SIOCSIFHWADDR: - if (copy_from_user - (dev->dev_addr, ifr->ifr_data, sizeof(dev->dev_addr))) - return -EFAULT; - return 0; - - case SIOCGIFHWADDR: - if (copy_to_user - (ifr->ifr_data, dev->dev_addr, sizeof(dev->dev_addr))) - return -EFAULT; - return 0; - - case SIOCGMIIPHY: - case SIOCGMIIREG: - case SIOCSMIIREG: - return phy_mii_ioctl(sp->phy_dev, data, cmd); - - default: - break; - } - - return -EOPNOTSUPP; -} - -static void ar2313_adjust_link(struct net_device *dev) -{ - struct ar2313_private *sp = netdev_priv(dev); - unsigned int mc; - - if (!sp->phy_dev->link) - return; - - if (sp->phy_dev->duplex != sp->oldduplex) { - mc = readl(&sp->eth_regs->mac_control); - mc &= ~(MAC_CONTROL_F | MAC_CONTROL_DRO); - if (sp->phy_dev->duplex) - mc |= MAC_CONTROL_F; - else - mc |= MAC_CONTROL_DRO; - writel(mc, &sp->eth_regs->mac_control); - sp->oldduplex = sp->phy_dev->duplex; - } -} - -#define MII_ADDR(phy, reg) \ - ((reg << MII_ADDR_REG_SHIFT) | (phy << MII_ADDR_PHY_SHIFT)) - -static int -mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum) -{ - struct net_device *const dev = bus->priv; - struct ar2313_private *sp = netdev_priv(dev); - volatile ETHERNET_STRUCT *ethernet = sp->phy_regs; - - ethernet->mii_addr = MII_ADDR(phy_addr, regnum); - while (ethernet->mii_addr & MII_ADDR_BUSY); - return (ethernet->mii_data >> MII_DATA_SHIFT); -} - -static int -mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, - u16 value) -{ - struct net_device *const dev = bus->priv; - struct ar2313_private *sp = netdev_priv(dev); - volatile ETHERNET_STRUCT *ethernet = sp->phy_regs; - - while (ethernet->mii_addr & MII_ADDR_BUSY); - ethernet->mii_data = value << MII_DATA_SHIFT; - ethernet->mii_addr = MII_ADDR(phy_addr, regnum) | MII_ADDR_WRITE; - - return 0; -} - -static int mdiobus_reset(struct mii_bus *bus) -{ - struct net_device *const dev = bus->priv; - - ar2313_reset_reg(dev); - - return 0; -} - -static int mdiobus_probe (struct net_device *dev) -{ - struct ar2313_private *const sp = netdev_priv(dev); - struct phy_device *phydev = NULL; - int phy_addr; - - /* find the first (lowest address) PHY on the current MAC's MII bus */ - for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) - if (sp->mii_bus.phy_map[phy_addr]) { - phydev = sp->mii_bus.phy_map[phy_addr]; - break; /* break out with first one found */ - } - - if (!phydev) { - printk (KERN_ERR "ar2313:%s: no PHY found\n", dev->name); - return -1; - } - - /* now we are supposed to have a proper phydev, to attach to... */ - BUG_ON(!phydev); - BUG_ON(phydev->attached_dev); - - phydev = phy_connect(dev, phydev->dev.bus_id, &ar2313_adjust_link, 0, - PHY_INTERFACE_MODE_MII); - - if (IS_ERR(phydev)) { - printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name); - return PTR_ERR(phydev); - } - - /* mask with MAC supported features */ - phydev->supported &= (SUPPORTED_10baseT_Half - | SUPPORTED_10baseT_Full - | SUPPORTED_100baseT_Half - | SUPPORTED_100baseT_Full - | SUPPORTED_Autoneg - /* | SUPPORTED_Pause | SUPPORTED_Asym_Pause */ - | SUPPORTED_MII - | SUPPORTED_TP); - - phydev->advertising = phydev->supported; - - sp->oldduplex = -1; - sp->phy_dev = phydev; - - printk(KERN_INFO "%s: attached PHY driver [%s] " - "(mii_bus:phy_addr=%s)\n", - dev->name, phydev->drv->name, phydev->dev.bus_id); - - return 0; -} - |