-/**************************************************************************
- *
- * BRIEF MODULE DESCRIPTION
- * Driver for the IDT RC32434 on-chip ethernet controller.
- *
- * Copyright 2004 IDT Inc. (rischelp@idt.com)
- * Copyright 2006 Felix Fietkau <nbd@openwrt.org>
- *
- * 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.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *
- **************************************************************************
- * May 2004 rkt, neb
- *
- * Based on the driver developed by B. Maruthanayakam, H. Kou and others.
- *
- * Aug 2004 Sadik
- *
- * Added NAPI
- *
- **************************************************************************
- */
-
-#include <linux/autoconf.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/moduleparam.h>
-#include <linux/sched.h>
-#include <linux/ctype.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/ptrace.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/proc_fs.h>
-#include <linux/in.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/errno.h>
-#include <linux/platform_device.h>
-#include <asm/bootinfo.h>
-#include <asm/system.h>
-#include <asm/bitops.h>
-#include <asm/pgtable.h>
-#include <asm/segment.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#include <asm/rc32434/rb.h>
-#include "rc32434_eth.h"
-
-#define DRIVER_VERSION "(mar2904)"
-
-#define DRIVER_NAME "rc32434 Ethernet driver. " DRIVER_VERSION
-
-#define STATION_ADDRESS_HIGH(dev) (((dev)->dev_addr[0] << 8) | \
- ((dev)->dev_addr[1]))
-#define STATION_ADDRESS_LOW(dev) (((dev)->dev_addr[2] << 24) | \
- ((dev)->dev_addr[3] << 16) | \
- ((dev)->dev_addr[4] << 8) | \
- ((dev)->dev_addr[5]))
-
-#define MII_CLOCK 1250000 /* no more than 2.5MHz */
-#define CONFIG_IDT_USE_NAPI 1
-
-
-static inline void rc32434_abort_tx(struct net_device *dev)
-{
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- rc32434_abort_dma(dev, lp->tx_dma_regs);
-
-}
-
-static inline void rc32434_abort_rx(struct net_device *dev)
-{
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- rc32434_abort_dma(dev, lp->rx_dma_regs);
-
-}
-
-static inline void rc32434_start_tx(struct rc32434_local *lp, volatile DMAD_t td)
-{
- rc32434_start_dma(lp->tx_dma_regs, CPHYSADDR(td));
-}
-
-static inline void rc32434_start_rx(struct rc32434_local *lp, volatile DMAD_t rd)
-{
- rc32434_start_dma(lp->rx_dma_regs, CPHYSADDR(rd));
-}
-
-static inline void rc32434_chain_tx(struct rc32434_local *lp, volatile DMAD_t td)
-{
- rc32434_chain_dma(lp->tx_dma_regs, CPHYSADDR(td));
-}
-
-static inline void rc32434_chain_rx(struct rc32434_local *lp, volatile DMAD_t rd)
-{
- rc32434_chain_dma(lp->rx_dma_regs, CPHYSADDR(rd));
-}
-
-#ifdef RC32434_PROC_DEBUG
-static int rc32434_read_proc(char *buf, char **start, off_t fpos,
- int length, int *eof, void *data)
-{
- struct net_device *dev = (struct net_device *)data;
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- int len = 0;
-
- /* print out header */
- len += sprintf(buf + len, "\n\tKorina Ethernet Debug\n\n");
- len += sprintf (buf + len,
- "DMA halt count = %10d, DMA run count = %10d\n",
- lp->dma_halt_cnt, lp->dma_run_cnt);
-
- if (fpos >= len) {
- *start = buf;
- *eof = 1;
- return 0;
- }
- *start = buf + fpos;
-
- if ((len -= fpos) > length)
- return length;
- *eof = 1;
-
- return len;
-
-}
-#endif
-
-
-/*
- * Restart the RC32434 ethernet controller.
- */
-static int rc32434_restart(struct net_device *dev)
-{
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
-
- /*
- * Disable interrupts
- */
- disable_irq(lp->rx_irq);
- disable_irq(lp->tx_irq);
-#ifdef RC32434_REVISION
- disable_irq(lp->ovr_irq);
-#endif
- disable_irq(lp->und_irq);
-
- /* Mask F E bit in Tx DMA */
- __raw_writel(__raw_readl(&lp->tx_dma_regs->dmasm) | DMASM_f_m | DMASM_e_m, &lp->tx_dma_regs->dmasm);
- /* Mask D H E bit in Rx DMA */
- __raw_writel(__raw_readl(&lp->rx_dma_regs->dmasm) | DMASM_d_m | DMASM_h_m | DMASM_e_m, &lp->rx_dma_regs->dmasm);
-
- rc32434_init(dev);
- rc32434_multicast_list(dev);
-
- enable_irq(lp->und_irq);
-#ifdef RC32434_REVISION
- enable_irq(lp->ovr_irq);
-#endif
- enable_irq(lp->tx_irq);
- enable_irq(lp->rx_irq);
-
- return 0;
-}
-
-static int rc32434_probe(struct platform_device *pdev)
-{
- struct korina_device *bif = (struct korina_device *) pdev->dev.platform_data;
- struct rc32434_local *lp = NULL;
- struct net_device *dev = NULL;
- struct resource *r;
- int i, retval,err;
-
- dev = alloc_etherdev(sizeof(struct rc32434_local));
- if(!dev) {
- ERR("Korina_eth: alloc_etherdev failed\n");
- return -1;
- }
-
- platform_set_drvdata(pdev, dev);
- SET_MODULE_OWNER(dev);
- bif->dev = dev;
-
- memcpy(dev->dev_addr, bif->mac, 6);
-
- /* Initialize the device structure. */
- if (dev->priv == NULL) {
- lp = (struct rc32434_local *)kmalloc(sizeof(*lp), GFP_KERNEL);
- memset(lp, 0, sizeof(struct rc32434_local));
- }
- else {
- lp = (struct rc32434_local *)dev->priv;
- }
-
- lp->rx_irq = platform_get_irq_byname(pdev, "korina_rx");
- lp->tx_irq = platform_get_irq_byname(pdev, "korina_tx");
- lp->ovr_irq = platform_get_irq_byname(pdev, "korina_ovr");
- lp->und_irq = platform_get_irq_byname(pdev, "korina_und");
-
- r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_regs");
- dev->base_addr = r->start;
- lp->eth_regs = ioremap_nocache(r->start, r->end - r->start);
- if (!lp->eth_regs) {
- ERR("Can't remap eth registers\n");
- retval = -ENXIO;
- goto probe_err_out;
- }
-
- r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_rx");
- lp->rx_dma_regs = ioremap_nocache(r->start, r->end - r->start);
- if (!lp->rx_dma_regs) {
- ERR("Can't remap Rx DMA registers\n");
- retval = -ENXIO;
- goto probe_err_out;
- }
-
- r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "korina_dma_tx");
- lp->tx_dma_regs = ioremap_nocache(r->start, r->end - r->start);
- if (!lp->tx_dma_regs) {
- ERR("Can't remap Tx DMA registers\n");
- retval = -ENXIO;
- goto probe_err_out;
- }
-
-#ifdef RC32434_PROC_DEBUG
- lp->ps = create_proc_read_entry (bif->name, 0, proc_net,
- rc32434_read_proc, dev);
-#endif
-
- lp->td_ring = (DMAD_t)kmalloc(TD_RING_SIZE + RD_RING_SIZE, GFP_KERNEL);
- if (!lp->td_ring) {
- ERR("Can't allocate descriptors\n");
- retval = -ENOMEM;
- goto probe_err_out;
- }
-
- dma_cache_inv((unsigned long)(lp->td_ring), TD_RING_SIZE + RD_RING_SIZE);
-
- /* now convert TD_RING pointer to KSEG1 */
- lp->td_ring = (DMAD_t )KSEG1ADDR(lp->td_ring);
- lp->rd_ring = &lp->td_ring[RC32434_NUM_TDS];
-
-
- spin_lock_init(&lp->lock);
-
- /* just use the rx dma irq */
- dev->irq = lp->rx_irq;
-
- dev->priv = lp;
-
- dev->open = rc32434_open;
- dev->stop = rc32434_close;
- dev->hard_start_xmit = rc32434_send_packet;
- dev->get_stats = rc32434_get_stats;
- dev->set_multicast_list = &rc32434_multicast_list;
- dev->tx_timeout = rc32434_tx_timeout;
- dev->watchdog_timeo = RC32434_TX_TIMEOUT;
-
-#ifdef CONFIG_IDT_USE_NAPI
- dev->poll = rc32434_poll;
- dev->weight = 64;
- printk("Using NAPI with weight %d\n",dev->weight);
-#else
- lp->rx_tasklet = kmalloc(sizeof(struct tasklet_struct), GFP_KERNEL);
- tasklet_init(lp->rx_tasklet, rc32434_rx_tasklet, (unsigned long)dev);
-#endif
- lp->tx_tasklet = kmalloc(sizeof(struct tasklet_struct), GFP_KERNEL);
- tasklet_init(lp->tx_tasklet, rc32434_tx_tasklet, (unsigned long)dev);
-
- if ((err = register_netdev(dev))) {
- printk(KERN_ERR "rc32434 ethernet. Cannot register net device %d\n", err);
- free_netdev(dev);
- retval = -EINVAL;
- goto probe_err_out;
- }
-
- INFO("Rx IRQ %d, Tx IRQ %d, ", lp->rx_irq, lp->tx_irq);
- for (i = 0; i < 6; i++) {
- printk("%2.2x", dev->dev_addr[i]);
- if (i<5)
- printk(":");
- }
- printk("\n");
-
- return 0;
-
- probe_err_out:
- rc32434_cleanup_module();
- ERR(" failed. Returns %d\n", retval);
- return retval;
-
-}
-
-static int rc32434_remove(struct platform_device *pdev)
-{
- struct korina_device *bif = (struct korina_device *) pdev->dev.platform_data;
-
- if (bif->dev != NULL) {
- struct rc32434_local *lp = (struct rc32434_local *)bif->dev->priv;
- if (lp != NULL) {
- if (lp->eth_regs)
- iounmap((void*)lp->eth_regs);
- if (lp->rx_dma_regs)
- iounmap((void*)lp->rx_dma_regs);
- if (lp->tx_dma_regs)
- iounmap((void*)lp->tx_dma_regs);
- if (lp->td_ring)
- kfree((void*)KSEG0ADDR(lp->td_ring));
-
-#ifdef RC32434_PROC_DEBUG
- if (lp->ps) {
- remove_proc_entry(bif->name, proc_net);
- }
-#endif
- kfree(lp);
- }
-
- platform_set_drvdata(pdev, NULL);
- unregister_netdev(bif->dev);
- free_netdev(bif->dev);
- kfree(bif->dev);
- }
- return 0;
-}
-
-
-static int rc32434_open(struct net_device *dev)
-{
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
-
- /* Initialize */
- if (rc32434_init(dev)) {
- ERR("Error: cannot open the Ethernet device\n");
- return -EAGAIN;
- }
-
- /* Install the interrupt handler that handles the Done Finished Ovr and Und Events */
- if (request_irq(lp->rx_irq, &rc32434_rx_dma_interrupt,
- SA_SHIRQ | SA_INTERRUPT,
- "Korina ethernet Rx", dev)) {
- ERR(": unable to get Rx DMA IRQ %d\n",
- lp->rx_irq);
- return -EAGAIN;
- }
- if (request_irq(lp->tx_irq, &rc32434_tx_dma_interrupt,
- SA_SHIRQ | SA_INTERRUPT,
- "Korina ethernet Tx", dev)) {
- ERR(": unable to get Tx DMA IRQ %d\n",
- lp->tx_irq);
- free_irq(lp->rx_irq, dev);
- return -EAGAIN;
- }
-
-#ifdef RC32434_REVISION
- /* Install handler for overrun error. */
- if (request_irq(lp->ovr_irq, &rc32434_ovr_interrupt,
- SA_SHIRQ | SA_INTERRUPT,
- "Ethernet Overflow", dev)) {
- ERR(": unable to get OVR IRQ %d\n",
- lp->ovr_irq);
- free_irq(lp->rx_irq, dev);
- free_irq(lp->tx_irq, dev);
- return -EAGAIN;
- }
-#endif
-
- /* Install handler for underflow error. */
- if (request_irq(lp->und_irq, &rc32434_und_interrupt,
- SA_SHIRQ | SA_INTERRUPT,
- "Ethernet Underflow", dev)) {
- ERR(": unable to get UND IRQ %d\n",
- lp->und_irq);
- free_irq(lp->rx_irq, dev);
- free_irq(lp->tx_irq, dev);
-#ifdef RC32434_REVISION
- free_irq(lp->ovr_irq, dev);
-#endif
- return -EAGAIN;
- }
-
-
- return 0;
-}
-
-
-
-
-static int rc32434_close(struct net_device *dev)
-{
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- u32 tmp;
-
- /* Disable interrupts */
- disable_irq(lp->rx_irq);
- disable_irq(lp->tx_irq);
-#ifdef RC32434_REVISION
- disable_irq(lp->ovr_irq);
-#endif
- disable_irq(lp->und_irq);
-
- tmp = __raw_readl(&lp->tx_dma_regs->dmasm);
- tmp = tmp | DMASM_f_m | DMASM_e_m;
- __raw_writel(tmp, &lp->tx_dma_regs->dmasm);
-
- tmp = __raw_readl(&lp->rx_dma_regs->dmasm);
- tmp = tmp | DMASM_d_m | DMASM_h_m | DMASM_e_m;
- __raw_writel(tmp, &lp->rx_dma_regs->dmasm);
-
- free_irq(lp->rx_irq, dev);
- free_irq(lp->tx_irq, dev);
-#ifdef RC32434_REVISION
- free_irq(lp->ovr_irq, dev);
-#endif
- free_irq(lp->und_irq, dev);
- return 0;
-}
-
-
-/* transmit packet */
-static int rc32434_send_packet(struct sk_buff *skb, struct net_device *dev)
-{
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- unsigned long flags;
- u32 length;
- DMAD_t td;
-
-
- spin_lock_irqsave(&lp->lock, flags);
-
- td = &lp->td_ring[lp->tx_chain_tail];
-
- /* stop queue when full, drop pkts if queue already full */
- if(lp->tx_count >= (RC32434_NUM_TDS - 2)) {
- lp->tx_full = 1;
-
- if(lp->tx_count == (RC32434_NUM_TDS - 2)) {
- netif_stop_queue(dev);
- }
- else {
- lp->stats.tx_dropped++;
- dev_kfree_skb_any(skb);
- spin_unlock_irqrestore(&lp->lock, flags);
- return 1;
- }
- }
-
- lp->tx_count ++;
-
- lp->tx_skb[lp->tx_chain_tail] = skb;
-
- length = skb->len;
- dma_cache_wback((u32)skb->data, skb->len);
-
- /* Setup the transmit descriptor. */
- dma_cache_inv((u32) td, sizeof(*td));
- td->ca = CPHYSADDR(skb->data);
-
- if(__raw_readl(&(lp->tx_dma_regs->dmandptr)) == 0) {
- if( lp->tx_chain_status == empty ) {
- td->control = DMA_COUNT(length) |DMAD_cof_m |DMAD_iof_m; /* Update tail */
- lp->tx_chain_tail = (lp->tx_chain_tail + 1) & RC32434_TDS_MASK; /* Move tail */
- __raw_writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), &(lp->tx_dma_regs->dmandptr)); /* Write to NDPTR */
- lp->tx_chain_head = lp->tx_chain_tail; /* Move head to tail */
- }
- else {
- td->control = DMA_COUNT(length) |DMAD_cof_m|DMAD_iof_m; /* Update tail */
- lp->td_ring[(lp->tx_chain_tail-1)& RC32434_TDS_MASK].control &= ~(DMAD_cof_m); /* Link to prev */
- lp->td_ring[(lp->tx_chain_tail-1)& RC32434_TDS_MASK].link = CPHYSADDR(td); /* Link to prev */
- lp->tx_chain_tail = (lp->tx_chain_tail + 1) & RC32434_TDS_MASK; /* Move tail */
- __raw_writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), &(lp->tx_dma_regs->dmandptr)); /* Write to NDPTR */
- lp->tx_chain_head = lp->tx_chain_tail; /* Move head to tail */
- lp->tx_chain_status = empty;
- }
- }
- else {
- if( lp->tx_chain_status == empty ) {
- td->control = DMA_COUNT(length) |DMAD_cof_m |DMAD_iof_m; /* Update tail */
- lp->tx_chain_tail = (lp->tx_chain_tail + 1) & RC32434_TDS_MASK; /* Move tail */
- lp->tx_chain_status = filled;
- }
- else {
- td->control = DMA_COUNT(length) |DMAD_cof_m |DMAD_iof_m; /* Update tail */
- lp->td_ring[(lp->tx_chain_tail-1)& RC32434_TDS_MASK].control &= ~(DMAD_cof_m); /* Link to prev */
- lp->td_ring[(lp->tx_chain_tail-1)& RC32434_TDS_MASK].link = CPHYSADDR(td); /* Link to prev */
- lp->tx_chain_tail = (lp->tx_chain_tail + 1) & RC32434_TDS_MASK; /* Move tail */
- }
- }
- dma_cache_wback((u32) td, sizeof(*td));
-
- dev->trans_start = jiffies;
-
- spin_unlock_irqrestore(&lp->lock, flags);
-
- return 0;
-}
-
-
-/* Ethernet MII-PHY Handler */
-static void rc32434_mii_handler(unsigned long data)
-{
- struct net_device *dev = (struct net_device *)data;
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- unsigned long flags;
- unsigned long duplex_status;
- int port_addr = (lp->rx_irq == 0x2c? 1:0) << 8;
-
- spin_lock_irqsave(&lp->lock, flags);
-
- /* Two ports are using the same MII, the difference is the PHY address */
- __raw_writel(0, &rc32434_eth0_regs->miimcfg);
- __raw_writel(0, &rc32434_eth0_regs->miimcmd);
- __raw_writel(port_addr |0x05, &rc32434_eth0_regs->miimaddr);
- __raw_writel(MIIMCMD_scn_m, &rc32434_eth0_regs->miimcmd);
- while(__raw_readl(&rc32434_eth0_regs->miimind) & MIIMIND_nv_m);
-
- ERR("irq:%x port_addr:%x RDD:%x\n",
- lp->rx_irq, port_addr, __raw_readl(&rc32434_eth0_regs->miimrdd));
- duplex_status = (__raw_readl(&rc32434_eth0_regs->miimrdd) & 0x140)? ETHMAC2_fd_m: 0;
- if(duplex_status != lp->duplex_mode) {
- ERR("The MII-PHY is Auto-negotiated to %s-Duplex mode for Eth-%x\n", duplex_status? "Full":"Half", lp->rx_irq == 0x2c? 1:0);
- lp->duplex_mode = duplex_status;
- rc32434_restart(dev);
- }
-
- lp->mii_phy_timer.expires = jiffies + 10 * HZ;
- add_timer(&lp->mii_phy_timer);
-
- spin_unlock_irqrestore(&lp->lock, flags);
-
-}
-
-#ifdef RC32434_REVISION
-/* Ethernet Rx Overflow interrupt */
-static irqreturn_t
-rc32434_ovr_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *)dev_id;
- struct rc32434_local *lp;
- unsigned int ovr;
- irqreturn_t retval = IRQ_NONE;
-
- ASSERT(dev != NULL);
-
- lp = (struct rc32434_local *)dev->priv;
- spin_lock(&lp->lock);
- ovr = __raw_readl(&lp->eth_regs->ethintfc);
-
- if(ovr & ETHINTFC_ovr_m) {
- netif_stop_queue(dev);
-
- /* clear OVR bit */
- __raw_writel((ovr & ~ETHINTFC_ovr_m), &lp->eth_regs->ethintfc);
-
- /* Restart interface */
- rc32434_restart(dev);
- retval = IRQ_HANDLED;
- }
- spin_unlock(&lp->lock);
-
- return retval;
-}
-
-#endif
-
-
-/* Ethernet Tx Underflow interrupt */
-static irqreturn_t
-rc32434_und_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *)dev_id;
- struct rc32434_local *lp;
- unsigned int und;
- irqreturn_t retval = IRQ_NONE;
-
- ASSERT(dev != NULL);
-
- lp = (struct rc32434_local *)dev->priv;
-
- spin_lock(&lp->lock);
-
- und = __raw_readl(&lp->eth_regs->ethintfc);
-
- if(und & ETHINTFC_und_m) {
- netif_stop_queue(dev);
-
- __raw_writel((und & ~ETHINTFC_und_m), &lp->eth_regs->ethintfc);
-
- /* Restart interface */
- rc32434_restart(dev);
- retval = IRQ_HANDLED;
- }
-
- spin_unlock(&lp->lock);
-
- return retval;
-}
-
-
-/* Ethernet Rx DMA interrupt */
-static irqreturn_t
-rc32434_rx_dma_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *)dev_id;
- struct rc32434_local* lp;
- volatile u32 dmas,dmasm;
- irqreturn_t retval;
-
- ASSERT(dev != NULL);
-
- lp = (struct rc32434_local *)dev->priv;
-
- spin_lock(&lp->lock);
- dmas = __raw_readl(&lp->rx_dma_regs->dmas);
- if(dmas & (DMAS_d_m|DMAS_h_m|DMAS_e_m)) {
- /* Mask D H E bit in Rx DMA */
- dmasm = __raw_readl(&lp->rx_dma_regs->dmasm);
- __raw_writel(dmasm | (DMASM_d_m | DMASM_h_m | DMASM_e_m), &lp->rx_dma_regs->dmasm);
-#ifdef CONFIG_IDT_USE_NAPI
- if(netif_rx_schedule_prep(dev))
- __netif_rx_schedule(dev);
-#else
- tasklet_hi_schedule(lp->rx_tasklet);
-#endif
-
- if (dmas & DMAS_e_m)
- ERR(": DMA error\n");
-
- retval = IRQ_HANDLED;
- }
- else
- retval = IRQ_NONE;
-
- spin_unlock(&lp->lock);
- return retval;
-}
-
-#ifdef CONFIG_IDT_USE_NAPI
-static int rc32434_poll(struct net_device *rx_data_dev, int *budget)
-#else
-static void rc32434_rx_tasklet(unsigned long rx_data_dev)
-#endif
-{
- struct net_device *dev = (struct net_device *)rx_data_dev;
- struct rc32434_local* lp = netdev_priv(dev);
- volatile DMAD_t rd = &lp->rd_ring[lp->rx_next_done];
- struct sk_buff *skb, *skb_new;
- u8* pkt_buf;
- u32 devcs, count, pkt_len, pktuncrc_len;
- volatile u32 dmas;
-#ifdef CONFIG_IDT_USE_NAPI
- u32 received = 0;
- int rx_work_limit = min(*budget,dev->quota);
-#else
- unsigned long flags;
- spin_lock_irqsave(&lp->lock, flags);
-#endif
-
- dma_cache_inv((u32)rd, sizeof(*rd));
- while ( (count = RC32434_RBSIZE - (u32)DMA_COUNT(rd->control)) != 0) {
-#ifdef CONFIG_IDT_USE_NAPI
- if(--rx_work_limit <0)
- {
- break;
- }
-#endif
- /* init the var. used for the later operations within the while loop */
- skb_new = NULL;
- devcs = rd->devcs;
- pkt_len = RCVPKT_LENGTH(devcs);
- skb = lp->rx_skb[lp->rx_next_done];
-
- if (count < 64) {
- lp->stats.rx_errors++;
- lp->stats.rx_dropped++;
- }
- else if ((devcs & ( ETHRX_ld_m)) != ETHRX_ld_m) {
- /* check that this is a whole packet */
- /* WARNING: DMA_FD bit incorrectly set in Rc32434 (errata ref #077) */
- lp->stats.rx_errors++;
- lp->stats.rx_dropped++;
- }
- else if ( (devcs & ETHRX_rok_m) ) {
-
- {
- /* must be the (first and) last descriptor then */
- pkt_buf = (u8*)lp->rx_skb[lp->rx_next_done]->data;
-
- pktuncrc_len = pkt_len - 4;
- /* invalidate the cache */
- dma_cache_inv((unsigned long)pkt_buf, pktuncrc_len);
-
- /* Malloc up new buffer. */
- skb_new = dev_alloc_skb(RC32434_RBSIZE + 2);
-
- if (skb_new != NULL){
- /* Make room */
- skb_put(skb, pktuncrc_len);
-
- skb->protocol = eth_type_trans(skb, dev);
-
- /* pass the packet to upper layers */
-#ifdef CONFIG_IDT_USE_NAPI
- netif_receive_skb(skb);
-#else
- netif_rx(skb);
-#endif
-
- dev->last_rx = jiffies;
- lp->stats.rx_packets++;
- lp->stats.rx_bytes += pktuncrc_len;
-
- if (IS_RCV_MP(devcs))
- lp->stats.multicast++;
-
- /* 16 bit align */
- skb_reserve(skb_new, 2);
-
- skb_new->dev = dev;
- lp->rx_skb[lp->rx_next_done] = skb_new;
- }
- else {
- ERR("no memory, dropping rx packet.\n");
- lp->stats.rx_errors++;
- lp->stats.rx_dropped++;
- }
- }
-
- }
- else {
- /* This should only happen if we enable accepting broken packets */
- lp->stats.rx_errors++;
- lp->stats.rx_dropped++;
-
- /* add statistics counters */
- if (IS_RCV_CRC_ERR(devcs)) {
- DBG(2, "RX CRC error\n");
- lp->stats.rx_crc_errors++;
- }
- else if (IS_RCV_LOR_ERR(devcs)) {
- DBG(2, "RX LOR error\n");
- lp->stats.rx_length_errors++;
- }
- else if (IS_RCV_LE_ERR(devcs)) {
- DBG(2, "RX LE error\n");
- lp->stats.rx_length_errors++;
- }
- else if (IS_RCV_OVR_ERR(devcs)) {
- lp->stats.rx_over_errors++;
- }
- else if (IS_RCV_CV_ERR(devcs)) {
- /* code violation */
- DBG(2, "RX CV error\n");
- lp->stats.rx_frame_errors++;
- }
- else if (IS_RCV_CES_ERR(devcs)) {
- DBG(2, "RX Preamble error\n");
- }
- }
-
- rd->devcs = 0;
-
- /* restore descriptor's curr_addr */
- if(skb_new)
- rd->ca = CPHYSADDR(skb_new->data);
- else
- rd->ca = CPHYSADDR(skb->data);
-
- rd->control = DMA_COUNT(RC32434_RBSIZE) |DMAD_cod_m |DMAD_iod_m;
- lp->rd_ring[(lp->rx_next_done-1)& RC32434_RDS_MASK].control &= ~(DMAD_cod_m);
-
- lp->rx_next_done = (lp->rx_next_done + 1) & RC32434_RDS_MASK;
- dma_cache_wback((u32)rd, sizeof(*rd));
- rd = &lp->rd_ring[lp->rx_next_done];
- __raw_writel( ~DMAS_d_m, &lp->rx_dma_regs->dmas);
- }
-#ifdef CONFIG_IDT_USE_NAPI
- dev->quota -= received;
- *budget =- received;
- if(rx_work_limit < 0)
- goto not_done;
-#endif
-
- dmas = __raw_readl(&lp->rx_dma_regs->dmas);
-
- if(dmas & DMAS_h_m) {
- __raw_writel( ~(DMAS_h_m | DMAS_e_m), &lp->rx_dma_regs->dmas);
-#ifdef RC32434_PROC_DEBUG
- lp->dma_halt_cnt++;
-#endif
- rd->devcs = 0;
- skb = lp->rx_skb[lp->rx_next_done];
- rd->ca = CPHYSADDR(skb->data);
- dma_cache_wback((u32)rd, sizeof(*rd));
- rc32434_chain_rx(lp,rd);
- }
-
-#ifdef CONFIG_IDT_USE_NAPI
- netif_rx_complete(dev);
-#endif
- /* Enable D H E bit in Rx DMA */
- __raw_writel(__raw_readl(&lp->rx_dma_regs->dmasm) & ~(DMASM_d_m | DMASM_h_m |DMASM_e_m), &lp->rx_dma_regs->dmasm);
-#ifdef CONFIG_IDT_USE_NAPI
- return 0;
- not_done:
- return 1;
-#else
- spin_unlock_irqrestore(&lp->lock, flags);
- return;
-#endif
-
-
-}
-
-
-
-/* Ethernet Tx DMA interrupt */
-static irqreturn_t
-rc32434_tx_dma_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *)dev_id;
- struct rc32434_local *lp;
- volatile u32 dmas,dmasm;
- irqreturn_t retval;
-
- ASSERT(dev != NULL);
-
- lp = (struct rc32434_local *)dev->priv;
-
- spin_lock(&lp->lock);
-
- dmas = __raw_readl(&lp->tx_dma_regs->dmas);
-
- if (dmas & (DMAS_f_m | DMAS_e_m)) {
- dmasm = __raw_readl(&lp->tx_dma_regs->dmasm);
- /* Mask F E bit in Tx DMA */
- __raw_writel(dmasm | (DMASM_f_m | DMASM_e_m), &lp->tx_dma_regs->dmasm);
-
- tasklet_hi_schedule(lp->tx_tasklet);
-
- if(lp->tx_chain_status == filled && (__raw_readl(&(lp->tx_dma_regs->dmandptr)) == 0)) {
- __raw_writel(CPHYSADDR(&lp->td_ring[lp->tx_chain_head]), &(lp->tx_dma_regs->dmandptr));
- lp->tx_chain_status = empty;
- lp->tx_chain_head = lp->tx_chain_tail;
- dev->trans_start = jiffies;
- }
-
- if (dmas & DMAS_e_m)
- ERR(": DMA error\n");
-
- retval = IRQ_HANDLED;
- }
- else
- retval = IRQ_NONE;
-
- spin_unlock(&lp->lock);
-
- return retval;
-}
-
-
-static void rc32434_tx_tasklet(unsigned long tx_data_dev)
-{
- struct net_device *dev = (struct net_device *)tx_data_dev;
- struct rc32434_local* lp = (struct rc32434_local *)dev->priv;
- volatile DMAD_t td = &lp->td_ring[lp->tx_next_done];
- u32 devcs;
- unsigned long flags;
- volatile u32 dmas;
-
- spin_lock_irqsave(&lp->lock, flags);
-
- /* process all desc that are done */
- while(IS_DMA_FINISHED(td->control)) {
- if(lp->tx_full == 1) {
- netif_wake_queue(dev);
- lp->tx_full = 0;
- }
-
- devcs = lp->td_ring[lp->tx_next_done].devcs;
- if ((devcs & (ETHTX_fd_m | ETHTX_ld_m)) != (ETHTX_fd_m | ETHTX_ld_m)) {
- lp->stats.tx_errors++;
- lp->stats.tx_dropped++;
-
- /* should never happen */
- DBG(1, __FUNCTION__ ": split tx ignored\n");
- }
- else if (IS_TX_TOK(devcs)) {
- lp->stats.tx_packets++;
- lp->stats.tx_bytes+=lp->tx_skb[lp->tx_next_done]->len;
- }
- else {
- lp->stats.tx_errors++;
- lp->stats.tx_dropped++;
-
- /* underflow */
- if (IS_TX_UND_ERR(devcs))
- lp->stats.tx_fifo_errors++;
-
- /* oversized frame */
- if (IS_TX_OF_ERR(devcs))
- lp->stats.tx_aborted_errors++;
-
- /* excessive deferrals */
- if (IS_TX_ED_ERR(devcs))
- lp->stats.tx_carrier_errors++;
-
- /* collisions: medium busy */
- if (IS_TX_EC_ERR(devcs))
- lp->stats.collisions++;
-
- /* late collision */
- if (IS_TX_LC_ERR(devcs))
- lp->stats.tx_window_errors++;
-
- }
-
- /* We must always free the original skb */
- if (lp->tx_skb[lp->tx_next_done] != NULL) {
- dev_kfree_skb_any(lp->tx_skb[lp->tx_next_done]);
- lp->tx_skb[lp->tx_next_done] = NULL;
- }
-
- lp->td_ring[lp->tx_next_done].control = DMAD_iof_m;
- lp->td_ring[lp->tx_next_done].devcs = ETHTX_fd_m | ETHTX_ld_m;
- lp->td_ring[lp->tx_next_done].link = 0;
- lp->td_ring[lp->tx_next_done].ca = 0;
- lp->tx_count --;
-
- /* go on to next transmission */
- lp->tx_next_done = (lp->tx_next_done + 1) & RC32434_TDS_MASK;
- td = &lp->td_ring[lp->tx_next_done];
-
- }
-
- dmas = __raw_readl(&lp->tx_dma_regs->dmas);
- __raw_writel( ~dmas, &lp->tx_dma_regs->dmas);
-
- /* Enable F E bit in Tx DMA */
- __raw_writel(__raw_readl(&lp->tx_dma_regs->dmasm) & ~(DMASM_f_m | DMASM_e_m), &lp->tx_dma_regs->dmasm);
- spin_unlock_irqrestore(&lp->lock, flags);
-
-}
-
-
-static struct net_device_stats * rc32434_get_stats(struct net_device *dev)
-{
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- return &lp->stats;
-}
-
-
-/*
- * Set or clear the multicast filter for this adaptor.
- */
-static void rc32434_multicast_list(struct net_device *dev)
-{
- /* listen to broadcasts always and to treat */
- /* IFF bits independantly */
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- unsigned long flags;
- u32 recognise = ETHARC_ab_m; /* always accept broadcasts */
-
- if (dev->flags & IFF_PROMISC) /* set promiscuous mode */
- recognise |= ETHARC_pro_m;
-
- if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > 15))
- recognise |= ETHARC_am_m; /* all multicast & bcast */
- else if (dev->mc_count > 0) {
- DBG(2, __FUNCTION__ ": mc_count %d\n", dev->mc_count);
- recognise |= ETHARC_am_m; /* for the time being */
- }
-
- spin_lock_irqsave(&lp->lock, flags);
- __raw_writel(recognise, &lp->eth_regs->etharc);
- spin_unlock_irqrestore(&lp->lock, flags);
-}
-
-
-static void rc32434_tx_timeout(struct net_device *dev)
-{
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- unsigned long flags;
-
- spin_lock_irqsave(&lp->lock, flags);
- rc32434_restart(dev);
- spin_unlock_irqrestore(&lp->lock, flags);
-
-}
-
-
-/*
- * Initialize the RC32434 ethernet controller.
- */
-static int rc32434_init(struct net_device *dev)
-{
- struct rc32434_local *lp = (struct rc32434_local *)dev->priv;
- int i, j;
-
- /* Disable DMA */
- rc32434_abort_tx(dev);
- rc32434_abort_rx(dev);
-
- /* reset ethernet logic */
- __raw_writel(0, &lp->eth_regs->ethintfc);
- while((__raw_readl(&lp->eth_regs->ethintfc) & ETHINTFC_rip_m))
- dev->trans_start = jiffies;
-
- /* Enable Ethernet Interface */
- __raw_writel(ETHINTFC_en_m, &lp->eth_regs->ethintfc);
-
-#ifndef CONFIG_IDT_USE_NAPI
- tasklet_disable(lp->rx_tasklet);
-#endif
- tasklet_disable(lp->tx_tasklet);
-
- /* Initialize the transmit Descriptors */
- for (i = 0; i < RC32434_NUM_TDS; i++) {
- lp->td_ring[i].control = DMAD_iof_m;
- lp->td_ring[i].devcs = ETHTX_fd_m | ETHTX_ld_m;
- lp->td_ring[i].ca = 0;
- lp->td_ring[i].link = 0;
- if (lp->tx_skb[i] != NULL) {
- dev_kfree_skb_any(lp->tx_skb[i]);
- lp->tx_skb[i] = NULL;
- }
- }
- lp->tx_next_done = lp->tx_chain_head = lp->tx_chain_tail = lp->tx_full = lp->tx_count = 0;
- lp-> tx_chain_status = empty;
-
- /*
- * Initialize the receive descriptors so that they
- * become a circular linked list, ie. let the last
- * descriptor point to the first again.
- */
- for (i=0; i<RC32434_NUM_RDS; i++) {
- struct sk_buff *skb = lp->rx_skb[i];
-
- if (lp->rx_skb[i] == NULL) {
- skb = dev_alloc_skb(RC32434_RBSIZE + 2);
- if (skb == NULL) {
- ERR("No memory in the system\n");
- for (j = 0; j < RC32434_NUM_RDS; j ++)
- if (lp->rx_skb[j] != NULL)
- dev_kfree_skb_any(lp->rx_skb[j]);
-
- return 1;
- }
- else {
- skb->dev = dev;
- skb_reserve(skb, 2);
- lp->rx_skb[i] = skb;
- lp->rd_ring[i].ca = CPHYSADDR(skb->data);
-
- }
- }
- lp->rd_ring[i].control = DMAD_iod_m | DMA_COUNT(RC32434_RBSIZE);
- lp->rd_ring[i].devcs = 0;
- lp->rd_ring[i].ca = CPHYSADDR(skb->data);
- lp->rd_ring[i].link = CPHYSADDR(&lp->rd_ring[i+1]);
-
- }
- /* loop back */
- lp->rd_ring[RC32434_NUM_RDS-1].link = CPHYSADDR(&lp->rd_ring[0]);
- lp->rx_next_done = 0;
-
- lp->rd_ring[RC32434_NUM_RDS-1].control |= DMAD_cod_m;
- lp->rx_chain_head = 0;
- lp->rx_chain_tail = 0;
- lp->rx_chain_status = empty;
-
- __raw_writel(0, &lp->rx_dma_regs->dmas);
- /* Start Rx DMA */
- rc32434_start_rx(lp, &lp->rd_ring[0]);
-
- /* Enable F E bit in Tx DMA */
- __raw_writel(__raw_readl(&lp->tx_dma_regs->dmasm) & ~(DMASM_f_m | DMASM_e_m), &lp->tx_dma_regs->dmasm);
- /* Enable D H E bit in Rx DMA */
- __raw_writel(__raw_readl(&lp->rx_dma_regs->dmasm) & ~(DMASM_d_m | DMASM_h_m | DMASM_e_m), &lp->rx_dma_regs->dmasm);
-
- /* Accept only packets destined for this Ethernet device address */
- __raw_writel(ETHARC_ab_m, &lp->eth_regs->etharc);
-
- /* Set all Ether station address registers to their initial values */
- __raw_writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal0);
- __raw_writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah0);
-
- __raw_writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal1);
- __raw_writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah1);
-
- __raw_writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal2);
- __raw_writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah2);
-
- __raw_writel(STATION_ADDRESS_LOW(dev), &lp->eth_regs->ethsal3);
- __raw_writel(STATION_ADDRESS_HIGH(dev), &lp->eth_regs->ethsah3);
-
-
- /* Frame Length Checking, Pad Enable, CRC Enable, Full Duplex set */
- __raw_writel(ETHMAC2_pe_m | ETHMAC2_cen_m | ETHMAC2_fd_m, &lp->eth_regs->ethmac2);
- //ETHMAC2_flc_m ETHMAC2_fd_m lp->duplex_mode
-
- /* Back to back inter-packet-gap */
- __raw_writel(0x15, &lp->eth_regs->ethipgt);
- /* Non - Back to back inter-packet-gap */
- __raw_writel(0x12, &lp->eth_regs->ethipgr);
-
- /* Management Clock Prescaler Divisor */
- /* Clock independent setting */
- __raw_writel(((idt_cpu_freq)/MII_CLOCK+1) & ~1,
- &lp->eth_regs->ethmcp);
-
- /* don't transmit until fifo contains 48b */
- __raw_writel(48, &lp->eth_regs->ethfifott);
-
- __raw_writel(ETHMAC1_re_m, &lp->eth_regs->ethmac1);
-
-#ifndef CONFIG_IDT_USE_NAPI
- tasklet_enable(lp->rx_tasklet);
-#endif
- tasklet_enable(lp->tx_tasklet);
-
- netif_start_queue(dev);
-
- return 0;
-}
-
-static struct platform_driver korina_driver = {
- .driver.name = "korina",
- .probe = rc32434_probe,
- .remove = rc32434_remove,
-};
-
-static int __init rc32434_init_module(void)
-{
- return platform_driver_register(&korina_driver);
-}
-
-static void rc32434_cleanup_module(void)
-{
- return platform_driver_unregister(&korina_driver);
-}
-
-module_init(rc32434_init_module);
-module_exit(rc32434_cleanup_module);
projects / openwrt / svn-archive / archive.git / commitdiff