diff options
Diffstat (limited to 'target/linux/atheros/files/drivers/net/ar2313')
| -rw-r--r-- | target/linux/atheros/files/drivers/net/ar2313/Makefile | 5 | ||||
| -rw-r--r-- | target/linux/atheros/files/drivers/net/ar2313/ar2313.c | 1457 | ||||
| -rw-r--r-- | target/linux/atheros/files/drivers/net/ar2313/ar2313.h | 193 | ||||
| -rw-r--r-- | target/linux/atheros/files/drivers/net/ar2313/dma.h | 142 |
4 files changed, 1797 insertions, 0 deletions
diff --git a/target/linux/atheros/files/drivers/net/ar2313/Makefile b/target/linux/atheros/files/drivers/net/ar2313/Makefile new file mode 100644 index 000000000..9eb63e46b --- /dev/null +++ b/target/linux/atheros/files/drivers/net/ar2313/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the AR2313 ethernet driver +# + +obj-$(CONFIG_AR2313) += ar2313.o diff --git a/target/linux/atheros/files/drivers/net/ar2313/ar2313.c b/target/linux/atheros/files/drivers/net/ar2313/ar2313.c new file mode 100644 index 000000000..735ceebd9 --- /dev/null +++ b/target/linux/atheros/files/drivers/net/ar2313/ar2313.c @@ -0,0 +1,1457 @@ +/* + * 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/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 + +#define AR2313_BUFSIZE (AR2313_MTU + 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 +static short armiiread(struct net_device *dev, short phy, short reg); +static void armiiwrite(struct net_device *dev, short phy, short reg, + short data); +#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 ar2313_multicast_list(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; + } + + SET_MODULE_OWNER(dev); + platform_set_drvdata(pdev, dev); + + sp = dev->priv; + 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->get_stats = &ar2313_get_stats; + 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_SG | 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); + + /* 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 = (struct ar2313_private *) dev->priv; + + 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 = (struct ar2313_private *) dev->priv; + 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 = (struct ar2313_private *) dev->priv; + 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 = dev->priv; + + /* + * 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 = dev->priv; + 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 = dev->priv; + 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 = dev->priv; + 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 = dev->priv; + + 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 = dev->priv; + + // 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 = dev->priv; + u16 phyData; + + phyData = armiiread(dev, 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 = armiiread(dev, sp->phy, MII_BMCR); + if (reg & BMCR_ANENABLE) { + /* auto neg enabled */ + reg = armiiread(dev, 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 = (struct ar2313_private *) dev->priv; + 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 = dev->priv; + 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(&sp->stats, 0, sizeof(sp->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 = ((struct net_device *) dev)->priv; + 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 = dev->priv; + 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 + sp->stats.rx_errors++; + sp->stats.rx_dropped++; + + /* add statistics counters */ + if (status & DMA_RX_ERR_CRC) + sp->stats.rx_crc_errors++; + if (status & DMA_RX_ERR_COL) + sp->stats.rx_over_errors++; + if (status & DMA_RX_ERR_LENGTH) + sp->stats.rx_length_errors++; + if (status & DMA_RX_ERR_RUNT) + sp->stats.rx_over_errors++; + if (status & DMA_RX_ERR_DESC) + sp->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); + + sp->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); + + sp->stats.rx_packets++; + sp->rx_skb[idx] = skb_new; + } else { + sp->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 = dev->priv; + 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) { + sp->stats.tx_errors++; + sp->stats.tx_dropped++; + if (status & DMA_TX_ERR_UNDER) + sp->stats.tx_fifo_errors++; + if (status & DMA_TX_ERR_HB) + sp->stats.tx_heartbeat_errors++; + if (status & (DMA_TX_ERR_LOSS | DMA_TX_ERR_LINK)) + sp->stats.tx_carrier_errors++; + if (status & (DMA_TX_ERR_LATE | + DMA_TX_ERR_COL | + DMA_TX_ERR_JABBER | DMA_TX_ERR_DEFER)) + sp->stats.tx_aborted_errors++; + } else { + /* transmit OK */ + sp->stats.tx_packets++; + } + + skb = sp->tx_skb[idx]; + sp->tx_skb[idx] = NULL; + idx = DSC_NEXT(idx); + sp->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 = dev->priv; + + 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 = dev->priv; + + 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 = dev->priv; + 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; + + sp = dev->priv; + + 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 = dev->priv; + 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 = dev->priv; + 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 */ + sp->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 netdev_get_ecmd(struct net_device *dev, + struct ethtool_cmd *ecmd) +{ + struct ar2313_private *np = dev->priv; + u32 tmp; + + ecmd->supported = + (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | + SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | + SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII); + + ecmd->port = PORT_TP; + /* only supports internal transceiver */ + ecmd->transceiver = XCVR_INTERNAL; + /* not sure what this is for */ + ecmd->phy_address = 1; + + ecmd->advertising = ADVERTISED_MII; + tmp = armiiread(dev, np->phy, MII_ADVERTISE); + if (tmp & ADVERTISE_10HALF) + ecmd->advertising |= ADVERTISED_10baseT_Half; + if (tmp & ADVERTISE_10FULL) + ecmd->advertising |= ADVERTISED_10baseT_Full; + if (tmp & ADVERTISE_100HALF) + ecmd->advertising |= ADVERTISED_100baseT_Half; + if (tmp & ADVERTISE_100FULL) + ecmd->advertising |= ADVERTISED_100baseT_Full; + + tmp = armiiread(dev, np->phy, MII_BMCR); + if (tmp & BMCR_ANENABLE) { + ecmd->advertising |= ADVERTISED_Autoneg; + ecmd->autoneg = AUTONEG_ENABLE; + } else { + ecmd->autoneg = AUTONEG_DISABLE; + } + + if (ecmd->autoneg == AUTONEG_ENABLE) { + tmp = armiiread(dev, np->phy, MII_LPA); + if (tmp & (LPA_100FULL | LPA_10FULL)) { + ecmd->duplex = DUPLEX_FULL; + } else { + ecmd->duplex = DUPLEX_HALF; + } + if (tmp & (LPA_100FULL | LPA_100HALF)) { + ecmd->speed = SPEED_100; + } else { + ecmd->speed = SPEED_10; + } + } else { + if (tmp & BMCR_FULLDPLX) { + ecmd->duplex = DUPLEX_FULL; + } else { + ecmd->duplex = DUPLEX_HALF; + } + if (tmp & BMCR_SPEED100) { + ecmd->speed = SPEED_100; + } else { + ecmd->speed = SPEED_10; + } + } + + /* ignore maxtxpkt, maxrxpkt for now */ + + return 0; +} + +static int netdev_set_ecmd(struct net_device *dev, + struct ethtool_cmd *ecmd) +{ + struct ar2313_private *np = dev->priv; + u32 tmp; + + if (ecmd->speed != SPEED_10 && ecmd->speed != SPEED_100) + return -EINVAL; + if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL) + return -EINVAL; + if (ecmd->port != PORT_TP) + return -EINVAL; + if (ecmd->transceiver != XCVR_INTERNAL) + return -EINVAL; + if (ecmd->autoneg != AUTONEG_DISABLE + && ecmd->autoneg != AUTONEG_ENABLE) + return -EINVAL; + /* ignore phy_address, maxtxpkt, maxrxpkt for now */ + + /* WHEW! now lets bang some bits */ + + tmp = armiiread(dev, np->phy, MII_BMCR); + if (ecmd->autoneg == AUTONEG_ENABLE) { + /* turn on autonegotiation */ + tmp |= BMCR_ANENABLE; + printk("%s: Enabling auto-neg\n", dev->name); + } else { + /* turn off auto negotiation, set speed and duplexity */ + tmp &= ~(BMCR_ANENABLE | BMCR_SPEED100 | BMCR_FULLDPLX); + if (ecmd->speed == SPEED_100) + tmp |= BMCR_SPEED100; + if (ecmd->duplex == DUPLEX_FULL) + tmp |= BMCR_FULLDPLX; + printk("%s: Hard coding %d/%s\n", dev->name, + (ecmd->speed == SPEED_100) ? 100 : 10, + (ecmd->duplex == DUPLEX_FULL) ? "full" : "half"); + } + armiiwrite(dev, np->phy, MII_BMCR, tmp); + np->phyData = 0; + return 0; +} + +static int netdev_ethtool_ioctl(struct net_device *dev, void *useraddr) +{ + struct ar2313_private *np = dev->priv; + u32 cmd; + + if (get_user(cmd, (u32 *) useraddr)) + return -EFAULT; + + switch (cmd) { + /* get settings */ + case ETHTOOL_GSET:{ + struct ethtool_cmd ecmd = { ETHTOOL_GSET }; + spin_lock_irq(&np->lock); + netdev_get_ecmd(dev, &ecmd); + spin_unlock_irq(&np->lock); + if (copy_to_user(useraddr, &ecmd, sizeof(ecmd))) + return -EFAULT; + return 0; + } + /* set settings */ + case ETHTOOL_SSET:{ + struct ethtool_cmd ecmd; + int r; + if (copy_from_user(&ecmd, useraddr, sizeof(ecmd))) + return -EFAULT; + spin_lock_irq(&np->lock); + r = netdev_set_ecmd(dev, &ecmd); + spin_unlock_irq(&np->lock); + return r; + } + /* restart autonegotiation */ + case ETHTOOL_NWAY_RST:{ + int tmp; + int r = -EINVAL; + /* if autoneg is off, it's an error */ + tmp = armiiread(dev, np->phy, MII_BMCR); + if (tmp & BMCR_ANENABLE) { + tmp |= (BMCR_ANRESTART); + armiiwrite(dev, np->phy, MII_BMCR, tmp); + r = 0; + } + return r; + } + /* get link status */ + case ETHTOOL_GLINK:{ + struct ethtool_value edata = { ETHTOOL_GLINK }; + edata.data = + (armiiread(dev, np->phy, MII_BMSR) & BMSR_LSTATUS) ? 1 : 0; + if (copy_to_user(useraddr, &edata, sizeof(edata))) + return -EFAULT; + return 0; + } + } + + return -EOPNOTSUPP; +} + +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; + + switch (cmd) { + + case SIOCETHTOOL: + return netdev_ethtool_ioctl(dev, (void *) ifr->ifr_data); + + case SIOCGMIIPHY: /* Get address of MII PHY in use. */ + data->phy_id = 1; + /* Fall Through */ + + case SIOCGMIIREG: /* Read MII PHY register. */ + data->val_out = armiiread(dev, data->phy_id & 0x1f, + data->reg_num & 0x1f); + return 0; + case SIOCSMIIREG: /* Write MII PHY register. */ + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + armiiwrite(dev, data->phy_id & 0x1f, + data->reg_num & 0x1f, data->val_in); + return 0; + + 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; + + default: + break; + } + + return -EOPNOTSUPP; +} + +static struct net_device_stats *ar2313_get_stats(struct net_device *dev) +{ + struct ar2313_private *sp = dev->priv; + return &sp->stats; +} + + +#define MII_ADDR(phy, reg) \ + ((reg << MII_ADDR_REG_SHIFT) | (phy << MII_ADDR_PHY_SHIFT)) + +static short armiiread(struct net_device *dev, short phy, short reg) +{ + struct ar2313_private *sp = (struct ar2313_private *) dev->priv; + volatile ETHERNET_STRUCT *ethernet = sp->phy_regs; + + ethernet->mii_addr = MII_ADDR(phy, reg); + while (ethernet->mii_addr & MII_ADDR_BUSY); + return (ethernet->mii_data >> MII_DATA_SHIFT); +} + +static void +armiiwrite(struct net_device *dev, short phy, short reg, short data) +{ + struct ar2313_private *sp = (struct ar2313_private *) dev->priv; + volatile ETHERNET_STRUCT *ethernet = sp->phy_regs; + + while (ethernet->mii_addr & MII_ADDR_BUSY); + ethernet->mii_data = data << MII_DATA_SHIFT; + ethernet->mii_addr = MII_ADDR(phy, reg) | MII_ADDR_WRITE; +} diff --git a/target/linux/atheros/files/drivers/net/ar2313/ar2313.h b/target/linux/atheros/files/drivers/net/ar2313/ar2313.h new file mode 100644 index 000000000..c0b3a4f76 --- /dev/null +++ b/target/linux/atheros/files/drivers/net/ar2313/ar2313.h @@ -0,0 +1,193 @@ +#ifndef _AR2313_H_ +#define _AR2313_H_ + +#include <linux/autoconf.h> +#include <asm/bootinfo.h> +#include <ar531x_platform.h> + +/* + * probe link timer - 5 secs + */ +#define LINK_TIMER (5*HZ) + +#define IS_DMA_TX_INT(X) (((X) & (DMA_STATUS_TI)) != 0) +#define IS_DMA_RX_INT(X) (((X) & (DMA_STATUS_RI)) != 0) +#define IS_DRIVER_OWNED(X) (((X) & (DMA_TX_OWN)) == 0) + +#define AR2313_TX_TIMEOUT (HZ/4) + +/* + * Rings + */ +#define DSC_RING_ENTRIES_SIZE (AR2313_DESCR_ENTRIES * sizeof(struct desc)) +#define DSC_NEXT(idx) ((idx + 1) & (AR2313_DESCR_ENTRIES - 1)) + +static inline int tx_space(u32 csm, u32 prd) +{ + return (csm - prd - 1) & (AR2313_DESCR_ENTRIES - 1); +} + +#if MAX_SKB_FRAGS +#define TX_RESERVED (MAX_SKB_FRAGS+1) /* +1 for message header */ +#define tx_ring_full(csm, prd) (tx_space(csm, prd) <= TX_RESERVED) +#else +#define tx_ring_full 0 +#endif + +#define AR2313_MBGET 2 +#define AR2313_MBSET 3 +#define AR2313_PCI_RECONFIG 4 +#define AR2313_PCI_DUMP 5 +#define AR2313_TEST_PANIC 6 +#define AR2313_TEST_NULLPTR 7 +#define AR2313_READ_DATA 8 +#define AR2313_WRITE_DATA 9 +#define AR2313_GET_VERSION 10 +#define AR2313_TEST_HANG 11 +#define AR2313_SYNC 12 + + +// +// New Combo structure for Both Eth0 AND eth1 +// +typedef struct { + volatile unsigned int mac_control; /* 0x00 */ + volatile unsigned int mac_addr[2]; /* 0x04 - 0x08 */ + volatile unsigned int mcast_table[2]; /* 0x0c - 0x10 */ + volatile unsigned int mii_addr; /* 0x14 */ + volatile unsigned int mii_data; /* 0x18 */ + volatile unsigned int flow_control; /* 0x1c */ + volatile unsigned int vlan_tag; /* 0x20 */ + volatile unsigned int pad[7]; /* 0x24 - 0x3c */ + volatile unsigned int ucast_table[8]; /* 0x40-0x5c */ + +} ETHERNET_STRUCT; + +/******************************************************************** + * Interrupt controller + ********************************************************************/ + +typedef struct { + volatile unsigned int wdog_control; /* 0x08 */ + volatile unsigned int wdog_timer; /* 0x0c */ + volatile unsigned int misc_status; /* 0x10 */ + volatile unsigned int misc_mask; /* 0x14 */ + volatile unsigned int global_status; /* 0x18 */ + volatile unsigned int reserved; /* 0x1c */ + volatile unsigned int reset_control; /* 0x20 */ +} INTERRUPT; + +/******************************************************************** + * DMA controller + ********************************************************************/ +typedef struct { + volatile unsigned int bus_mode; /* 0x00 (CSR0) */ + volatile unsigned int xmt_poll; /* 0x04 (CSR1) */ + volatile unsigned int rcv_poll; /* 0x08 (CSR2) */ + volatile unsigned int rcv_base; /* 0x0c (CSR3) */ + volatile unsigned int xmt_base; /* 0x10 (CSR4) */ + volatile unsigned int status; /* 0x14 (CSR5) */ + volatile unsigned int control; /* 0x18 (CSR6) */ + volatile unsigned int intr_ena; /* 0x1c (CSR7) */ + volatile unsigned int rcv_missed; /* 0x20 (CSR8) */ + volatile unsigned int reserved[11]; /* 0x24-0x4c (CSR9-19) */ + volatile unsigned int cur_tx_buf_addr; /* 0x50 (CSR20) */ + volatile unsigned int cur_rx_buf_addr; /* 0x50 (CSR21) */ +} DMA; + +/* + * Struct private for the Sibyte. + * + * Elements are grouped so variables used by the tx handling goes + * together, and will go into the same cache lines etc. in order to + * avoid cache line contention between the rx and tx handling on SMP. + * + * Frequently accessed variables are put at the beginning of the + * struct to help the compiler generate better/shorter code. + */ +struct ar2313_private { + struct net_device *dev; + int version; + u32 mb[2]; + + volatile ETHERNET_STRUCT *phy_regs; + volatile ETHERNET_STRUCT *eth_regs; + volatile DMA *dma_regs; + volatile u32 *int_regs; + struct ar531x_eth *cfg; + + spinlock_t lock; /* Serialise access to device */ + + /* + * RX and TX descriptors, must be adjacent + */ + ar2313_descr_t *rx_ring; + ar2313_descr_t *tx_ring; + + + struct sk_buff **rx_skb; + struct sk_buff **tx_skb; + + /* + * RX elements + */ + u32 rx_skbprd; + u32 cur_rx; + + /* + * TX elements + */ + u32 tx_prd; + u32 tx_csm; + + /* + * Misc elements + */ + int board_idx; + char name[48]; + struct net_device_stats stats; + struct { + u32 address; + u32 length; + char *mapping; + } desc; + + + struct timer_list link_timer; + unsigned short phy; /* merlot phy = 1, samsung phy = 0x1f */ + unsigned short mac; + unsigned short link; /* 0 - link down, 1 - link up */ + u16 phyData; + + struct tasklet_struct rx_tasklet; + int unloading; +}; + + +/* + * Prototypes + */ +static int ar2313_init(struct net_device *dev); +#ifdef TX_TIMEOUT +static void ar2313_tx_timeout(struct net_device *dev); +#endif +#if 0 +static void ar2313_multicast_list(struct net_device *dev); +#endif +static int ar2313_restart(struct net_device *dev); +#if DEBUG +static void ar2313_dump_regs(struct net_device *dev); +#endif +static void ar2313_load_rx_ring(struct net_device *dev, int bufs); +static irqreturn_t ar2313_interrupt(int irq, void *dev_id); +static int ar2313_open(struct net_device *dev); +static int ar2313_start_xmit(struct sk_buff *skb, struct net_device *dev); +static int ar2313_close(struct net_device *dev); +static int ar2313_ioctl(struct net_device *dev, struct ifreq *ifr, + int cmd); +static void ar2313_init_cleanup(struct net_device *dev); +static int ar2313_setup_timer(struct net_device *dev); +static void ar2313_link_timer_fn(unsigned long data); +static void ar2313_check_link(struct net_device *dev); +static struct net_device_stats *ar2313_get_stats(struct net_device *dev); +#endif /* _AR2313_H_ */ diff --git a/target/linux/atheros/files/drivers/net/ar2313/dma.h b/target/linux/atheros/files/drivers/net/ar2313/dma.h new file mode 100644 index 000000000..113827047 --- /dev/null +++ b/target/linux/atheros/files/drivers/net/ar2313/dma.h @@ -0,0 +1,142 @@ +#ifndef __ARUBA_DMA_H__ +#define __ARUBA_DMA_H__ + +/******************************************************************************* + * + * Copyright 2002 Integrated Device Technology, Inc. + * All rights reserved. + * + * DMA register definition. + * + * File : $Id: dma.h,v 1.3 2002/06/06 18:34:03 astichte Exp $ + * + * Author : ryan.holmQVist@idt.com + * Date : 20011005 + * Update : + * $Log: dma.h,v $ + * Revision 1.3 2002/06/06 18:34:03 astichte + * Added XXX_PhysicalAddress and XXX_VirtualAddress + * + * Revision 1.2 2002/06/05 18:30:46 astichte + * Removed IDTField + * + * Revision 1.1 2002/05/29 17:33:21 sysarch + * jba File moved from vcode/include/idt/acacia + * + * + ******************************************************************************/ + +#define AR_BIT(x) (1 << (x)) +#define DMA_RX_ERR_CRC AR_BIT(1) +#define DMA_RX_ERR_DRIB AR_BIT(2) +#define DMA_RX_ERR_MII AR_BIT(3) +#define DMA_RX_EV2 AR_BIT(5) +#define DMA_RX_ERR_COL AR_BIT(6) +#define DMA_RX_LONG AR_BIT(7) +#define DMA_RX_LS AR_BIT(8) /* last descriptor */ +#define DMA_RX_FS AR_BIT(9) /* first descriptor */ +#define DMA_RX_MF AR_BIT(10) /* multicast frame */ +#define DMA_RX_ERR_RUNT AR_BIT(11) /* runt frame */ +#define DMA_RX_ERR_LENGTH AR_BIT(12) /* length error */ +#define DMA_RX_ERR_DESC AR_BIT(14) /* descriptor error */ +#define DMA_RX_ERROR AR_BIT(15) /* error summary */ +#define DMA_RX_LEN_MASK 0x3fff0000 +#define DMA_RX_LEN_SHIFT 16 +#define DMA_RX_FILT AR_BIT(30) +#define DMA_RX_OWN AR_BIT(31) /* desc owned by DMA controller */ + +#define DMA_RX1_BSIZE_MASK 0x000007ff +#define DMA_RX1_BSIZE_SHIFT 0 +#define DMA_RX1_CHAINED AR_BIT(24) +#define DMA_RX1_RER AR_BIT(25) + +#define DMA_TX_ERR_UNDER AR_BIT(1) /* underflow error */ +#define DMA_TX_ERR_DEFER AR_BIT(2) /* excessive deferral */ +#define DMA_TX_COL_MASK 0x78 +#define DMA_TX_COL_SHIFT 3 +#define DMA_TX_ERR_HB AR_BIT(7) /* hearbeat failure */ +#define DMA_TX_ERR_COL AR_BIT(8) /* excessive collisions */ +#define DMA_TX_ERR_LATE AR_BIT(9) /* late collision */ +#define DMA_TX_ERR_LINK AR_BIT(10) /* no carrier */ +#define DMA_TX_ERR_LOSS AR_BIT(11) /* loss of carrier */ +#define DMA_TX_ERR_JABBER AR_BIT(14) /* transmit jabber timeout */ +#define DMA_TX_ERROR AR_BIT(15) /* frame aborted */ +#define DMA_TX_OWN AR_BIT(31) /* descr owned by DMA controller */ + +#define DMA_TX1_BSIZE_MASK 0x000007ff +#define DMA_TX1_BSIZE_SHIFT 0 +#define DMA_TX1_CHAINED AR_BIT(24) /* chained descriptors */ +#define DMA_TX1_TER AR_BIT(25) /* transmit end of ring */ +#define DMA_TX1_FS AR_BIT(29) /* first segment */ +#define DMA_TX1_LS AR_BIT(30) /* last segment */ +#define DMA_TX1_IC AR_BIT(31) /* interrupt on completion */ + +#define RCVPKT_LENGTH(X) (X >> 16) /* Received pkt Length */ + +#define MAC_CONTROL_RE AR_BIT(2) /* receive enable */ +#define MAC_CONTROL_TE AR_BIT(3) /* transmit enable */ +#define MAC_CONTROL_DC AR_BIT(5) /* Deferral check */ +#define MAC_CONTROL_ASTP AR_BIT(8) /* Auto pad strip */ +#define MAC_CONTROL_DRTY AR_BIT(10) /* Disable retry */ +#define MAC_CONTROL_DBF AR_BIT(11) /* Disable bcast frames */ +#define MAC_CONTROL_LCC AR_BIT(12) /* late collision ctrl */ +#define MAC_CONTROL_HP AR_BIT(13) /* Hash Perfect filtering */ +#define MAC_CONTROL_HASH AR_BIT(14) /* Unicast hash filtering */ +#define MAC_CONTROL_HO AR_BIT(15) /* Hash only filtering */ +#define MAC_CONTROL_PB AR_BIT(16) /* Pass Bad frames */ +#define MAC_CONTROL_IF AR_BIT(17) /* Inverse filtering */ +#define MAC_CONTROL_PR AR_BIT(18) /* promiscuous mode (valid frames + only) */ +#define MAC_CONTROL_PM AR_BIT(19) /* pass multicast */ +#define MAC_CONTROL_F AR_BIT(20) /* full-duplex */ +#define MAC_CONTROL_DRO AR_BIT(23) /* Disable Receive Own */ +#define MAC_CONTROL_HBD AR_BIT(28) /* heart-beat disabled (MUST BE + SET) */ +#define MAC_CONTROL_BLE AR_BIT(30) /* big endian mode */ +#define MAC_CONTROL_RA AR_BIT(31) /* receive all (valid and invalid + frames) */ + +#define MII_ADDR_BUSY AR_BIT(0) +#define MII_ADDR_WRITE AR_BIT(1) +#define MII_ADDR_REG_SHIFT 6 +#define MII_ADDR_PHY_SHIFT 11 +#define MII_DATA_SHIFT 0 + +#define FLOW_CONTROL_FCE AR_BIT(1) + +#define DMA_BUS_MODE_SWR AR_BIT(0) /* software reset */ +#define DMA_BUS_MODE_BLE AR_BIT(7) /* big endian mode */ +#define DMA_BUS_MODE_PBL_SHIFT 8 /* programmable burst length 32 */ +#define DMA_BUS_MODE_DBO AR_BIT(20) /* big-endian descriptors */ + +#define DMA_STATUS_TI AR_BIT(0) /* transmit interrupt */ +#define DMA_STATUS_TPS AR_BIT(1) /* transmit process stopped */ +#define DMA_STATUS_TU AR_BIT(2) /* transmit buffer unavailable */ +#define DMA_STATUS_TJT AR_BIT(3) /* transmit buffer timeout */ +#define DMA_STATUS_UNF AR_BIT(5) /* transmit underflow */ +#define DMA_STATUS_RI AR_BIT(6) /* receive interrupt */ +#define DMA_STATUS_RU AR_BIT(7) /* receive buffer unavailable */ +#define DMA_STATUS_RPS AR_BIT(8) /* receive process stopped */ +#define DMA_STATUS_ETI AR_BIT(10) /* early transmit interrupt */ +#define DMA_STATUS_FBE AR_BIT(13) /* fatal bus interrupt */ +#define DMA_STATUS_ERI AR_BIT(14) /* early receive interrupt */ +#define DMA_STATUS_AIS AR_BIT(15) /* abnormal interrupt summary */ +#define DMA_STATUS_NIS AR_BIT(16) /* normal interrupt summary */ +#define DMA_STATUS_RS_SHIFT 17 /* receive process state */ +#define DMA_STATUS_TS_SHIFT 20 /* transmit process state */ +#define DMA_STATUS_EB_SHIFT 23 /* error bits */ + +#define DMA_CONTROL_SR AR_BIT(1) /* start receive */ +#define DMA_CONTROL_ST AR_BIT(13) /* start transmit */ +#define DMA_CONTROL_SF AR_BIT(21) /* store and forward */ + + +typedef struct { + volatile unsigned int status; // OWN, Device control and status. + volatile unsigned int devcs; // pkt Control bits + Length + volatile unsigned int addr; // Current Address. + volatile unsigned int descr; // Next descriptor in chain. +} ar2313_descr_t; + + +#endif // __ARUBA_DMA_H__ |