diff options
Diffstat (limited to 'target/linux/rb532/files/drivers/net/korina.c')
| -rw-r--r-- | target/linux/rb532/files/drivers/net/korina.c | 1167 |
1 files changed, 0 insertions, 1167 deletions
diff --git a/target/linux/rb532/files/drivers/net/korina.c b/target/linux/rb532/files/drivers/net/korina.c deleted file mode 100644 index e89f334cf..000000000 --- a/target/linux/rb532/files/drivers/net/korina.c +++ /dev/null @@ -1,1167 +0,0 @@ -/************************************************************************** - * - * 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); |