From 4f3a09388f325ee4a6e3591bcd1b6224c88eb3e5 Mon Sep 17 00:00:00 2001 From: blogic Date: Fri, 23 Oct 2009 16:51:51 +0000 Subject: [ramips] adds ethernet driver, esw needs to be moved to swconfig, driver is missing rt288x support, not a platform device yet git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18128 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- target/linux/ramips/files/drivers/net/ramips.c | 387 +++++++++++++++++++++++++ 1 file changed, 387 insertions(+) create mode 100644 target/linux/ramips/files/drivers/net/ramips.c (limited to 'target/linux/ramips/files/drivers/net/ramips.c') diff --git a/target/linux/ramips/files/drivers/net/ramips.c b/target/linux/ramips/files/drivers/net/ramips.c new file mode 100644 index 000000000..46def4051 --- /dev/null +++ b/target/linux/ramips/files/drivers/net/ramips.c @@ -0,0 +1,387 @@ +/* + * 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 program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) 2009 John Crispin + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define TX_TIMEOUT (20 * HZ / 100) +#define MAX_RX_LENGTH 1500 + +#ifdef CONFIG_RALINK_RT305X +#include "ramips_esw.c" +#endif + +static struct net_device * ramips_dev; +static void __iomem *ramips_fe_base = 0; + +static inline void +ramips_fe_wr(u32 val, unsigned reg) +{ + __raw_writel(val, ramips_fe_base + reg); +} + +static inline u32 +ramips_fe_rr(unsigned reg) +{ + return __raw_readl(ramips_fe_base + reg); +} + +static int +ramips_alloc_dma(struct net_device *dev) +{ +#define phys_to_bus(a) (a & 0x1FFFFFFF) + struct raeth_priv *priv = (struct raeth_priv*)netdev_priv(dev); + int i; + + priv->skb_free_idx = 0; + + /* setup tx ring */ + priv->tx = pci_alloc_consistent(NULL, + NUM_TX_DESC * sizeof(struct ramips_tx_dma), &priv->phy_tx); + for(i = 0; i < NUM_TX_DESC; i++) + { + memset(&priv->tx[i], 0, sizeof(struct ramips_tx_dma)); + priv->tx[i].txd2 |= TX_DMA_LSO | TX_DMA_DONE; + priv->tx[i].txd4 &= (TX_DMA_QN_MASK | TX_DMA_PN_MASK); + priv->tx[i].txd4 |= TX_DMA_QN(3) | TX_DMA_PN(1); + } + ramips_fe_wr(phys_to_bus(priv->phy_tx), RAMIPS_TX_BASE_PTR0); + ramips_fe_wr(NUM_TX_DESC, RAMIPS_TX_MAX_CNT0); + ramips_fe_wr(0, RAMIPS_TX_CTX_IDX0); + ramips_fe_wr(RAMIPS_PST_DTX_IDX0, RAMIPS_PDMA_RST_CFG); + + /* setup rx ring */ + priv->rx = pci_alloc_consistent(NULL, + NUM_RX_DESC * sizeof(struct ramips_rx_dma), &priv->phy_rx); + memset(priv->rx, 0, sizeof(struct ramips_rx_dma) * NUM_RX_DESC); + for(i = 0; i < NUM_RX_DESC; i++) + { + struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_LENGTH + 2); + BUG_ON(!new_skb); + skb_reserve(new_skb, 2); + priv->rx[i].rxd1 = + dma_map_single(NULL, skb_put(new_skb, 2), MAX_RX_LENGTH + 2, + PCI_DMA_FROMDEVICE); + priv->rx[i].rxd2 |= RX_DMA_LSO; + priv->rx[i].rxd3 = (unsigned int)new_skb; + } + dma_cache_wback_inv((unsigned long)priv->rx, + NUM_RX_DESC * (sizeof(struct ramips_rx_dma))); + + ramips_fe_wr(phys_to_bus(priv->phy_rx), RAMIPS_RX_BASE_PTR0); + ramips_fe_wr(NUM_RX_DESC, RAMIPS_RX_MAX_CNT0); + ramips_fe_wr((NUM_RX_DESC - 1), RAMIPS_RX_CALC_IDX0); + ramips_fe_wr(RAMIPS_PST_DRX_IDX0, RAMIPS_PDMA_RST_CFG); + + return 0; +} + +static int +ramips_eth_hard_start_xmit(struct sk_buff* skb, struct net_device *dev) +{ + struct raeth_priv *priv = (struct raeth_priv*)netdev_priv(dev); + unsigned long tx; + unsigned int tx_next; + +#ifdef CONFIG_RALINK_RT305X +#define MIN_PKT_LEN 64 + if(skb->len < MIN_PKT_LEN) + { + if(skb_padto(skb, MIN_PKT_LEN)) + { + printk(KERN_ERR "ramips_eth: skb_padto failed\n"); + kfree_skb(skb); + return 0; + } + skb_put(skb, MIN_PKT_LEN - skb->len); + } +#endif + dev->trans_start = jiffies; + dma_cache_wback_inv((unsigned long)skb->data, skb->len); + tx = ramips_fe_rr(RAMIPS_TX_CTX_IDX0); + if(tx == NUM_TX_DESC - 1) + tx_next = 0; + else + tx_next = tx + 1; + if((priv->tx[tx].txd3 == 0) && (priv->tx[tx_next].txd3 == 0)) + { + if(!(priv->tx[tx].txd2 & TX_DMA_DONE)) + { + kfree_skb(skb); + priv->stat.tx_dropped++; + printk(KERN_ERR "%s: dropping\n", dev->name); + return 0; + } + priv->tx[tx].txd1 = virt_to_phys(skb->data); + priv->tx[tx].txd2 &= ~(TX_DMA_PLEN0_MASK | TX_DMA_DONE); + priv->tx[tx].txd2 |= TX_DMA_PLEN0(skb->len); + ramips_fe_wr((tx + 1) % NUM_TX_DESC, RAMIPS_TX_CTX_IDX0); + priv->stat.tx_packets++; + priv->stat.tx_bytes += skb->len; + priv->tx[tx].txd3 = (unsigned int)skb; + ramips_fe_wr((tx + 1) % NUM_TX_DESC, RAMIPS_TX_CTX_IDX0); + } else { + priv->stat.tx_dropped++; + kfree_skb(skb); + } + return 0; +} + +static void +ramips_eth_rx_hw(unsigned long ptr) +{ + struct net_device *dev = (struct net_device*)ptr; + struct raeth_priv *priv = (struct raeth_priv*)netdev_priv(dev); + int rx; + int max_rx = 16; + + while(max_rx) + { + struct sk_buff *rx_skb, *new_skb; + + rx = (ramips_fe_rr(RAMIPS_RX_CALC_IDX0) + 1) % NUM_RX_DESC; + if(!(priv->rx[rx].rxd2 & RX_DMA_DONE)) + break; + max_rx--; + + rx_skb = (struct sk_buff*)priv->rx[rx].rxd3; + rx_skb->len = RX_DMA_PLEN0(priv->rx[rx].rxd2); + rx_skb->tail = rx_skb->data + rx_skb->len; + rx_skb->dev = dev; + rx_skb->protocol = eth_type_trans(rx_skb, dev); + rx_skb->ip_summed = CHECKSUM_NONE; + priv->stat.rx_packets++; + priv->stat.rx_bytes += rx_skb->len; + netif_rx(rx_skb); + + new_skb = __dev_alloc_skb(MAX_RX_LENGTH + 2, GFP_DMA | GFP_ATOMIC); + priv->rx[rx].rxd3 = (unsigned int)new_skb; + BUG_ON(!new_skb); + skb_reserve(new_skb, 2); + priv->rx[rx].rxd1 = + dma_map_single(NULL, new_skb->data, MAX_RX_LENGTH + 2, + PCI_DMA_FROMDEVICE); + priv->rx[rx].rxd2 &= ~RX_DMA_DONE; + dma_cache_wback_inv((unsigned long)&priv->rx[rx], + sizeof(struct ramips_rx_dma)); + ramips_fe_wr(rx, RAMIPS_RX_CALC_IDX0); + } + if(max_rx == 0) + tasklet_schedule(&priv->rx_tasklet); + else + ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) | RAMIPS_RX_DLY_INT, + RAMIPS_FE_INT_ENABLE); +} + +static void +ramips_eth_tx_housekeeping(unsigned long ptr) +{ + struct net_device *dev = (struct net_device*)ptr; + struct raeth_priv *priv = (struct raeth_priv*)netdev_priv(dev); + + while((priv->tx[priv->skb_free_idx].txd2 & TX_DMA_DONE) && + (priv->tx[priv->skb_free_idx].txd3)) + { + dev_kfree_skb_irq((struct sk_buff*)priv->tx[priv->skb_free_idx].txd3); + priv->tx[priv->skb_free_idx].txd3 = 0; + priv->skb_free_idx++; + if(priv->skb_free_idx >= NUM_TX_DESC) + priv->skb_free_idx = 0; + } + ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) | RAMIPS_TX_DLY_INT, + RAMIPS_FE_INT_ENABLE); +} + +static struct net_device_stats* +ramips_eth_get_stats(struct net_device *dev) +{ + return &((struct raeth_priv*)netdev_priv(dev))->stat; +} + +static int +ramips_eth_set_mac_addr(struct net_device *dev, void *priv) +{ + unsigned char *mac = (unsigned char*)priv; + + if(netif_running(dev)) + return -EBUSY; + memcpy(dev->dev_addr, ((struct sockaddr*)priv)->sa_data, dev->addr_len); + ramips_fe_wr((mac[0] << 8) | mac[1], RAMIPS_GDMA1_MAC_ADRH); + ramips_fe_wr(RAMIPS_GDMA1_MAC_ADRL, + (mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5]); + return 0; +} + +static void +ramips_eth_timeout(struct net_device *dev) +{ + tasklet_schedule( + &((struct raeth_priv*)netdev_priv(dev))->tx_housekeeping_tasklet); +} + +static irqreturn_t +ramips_eth_irq(int irq, void *dev) +{ + struct raeth_priv *priv = (struct raeth_priv*)netdev_priv(dev); + unsigned long fe_int = ramips_fe_rr(RAMIPS_FE_INT_STATUS); + + if(fe_int & RAMIPS_RX_DLY_INT) + { + ramips_fe_wr(ramips_fe_rr(RAMIPS_FE_INT_ENABLE) & ~(RAMIPS_RX_DLY_INT), + RAMIPS_FE_INT_ENABLE); + tasklet_schedule(&priv->rx_tasklet); + } + if(fe_int & RAMIPS_TX_DLY_INT) + tasklet_schedule(&priv->tx_housekeeping_tasklet); + ramips_fe_wr(0xFFFFFFFF, RAMIPS_FE_INT_STATUS); + return IRQ_HANDLED; +} + +static int +ramips_eth_open(struct net_device *dev) +{ + struct raeth_priv *priv = (struct raeth_priv*)netdev_priv(dev); + + ramips_alloc_dma(dev); + ramips_fe_wr((ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & 0xff) | + (RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | + RAMIPS_TX_DMA_EN | RAMIPS_PDMA_SIZE_4DWORDS), + RAMIPS_PDMA_GLO_CFG); + ramips_fe_wr((ramips_fe_rr(RAMIPS_FE_GLO_CFG) & + ~(RAMIPS_US_CYC_CNT_MASK << RAMIPS_US_CYC_CNT_SHIFT)) | + ((rt305x_sys_freq / RAMIPS_US_CYC_CNT_DIVISOR) << RAMIPS_US_CYC_CNT_SHIFT), + RAMIPS_FE_GLO_CFG); + request_irq(dev->irq, ramips_eth_irq, IRQF_DISABLED, dev->name, dev); + tasklet_init(&priv->tx_housekeeping_tasklet, ramips_eth_tx_housekeeping, + (unsigned long)dev); + tasklet_init(&priv->rx_tasklet, ramips_eth_rx_hw, (unsigned long)dev); + ramips_fe_wr(RAMIPS_DELAY_INIT, RAMIPS_DLY_INT_CFG); + ramips_fe_wr(RAMIPS_TX_DLY_INT | RAMIPS_RX_DLY_INT, RAMIPS_FE_INT_ENABLE); + ramips_fe_wr(ramips_fe_rr(RAMIPS_GDMA1_FWD_CFG) & + ~(RAMIPS_GDM1_ICS_EN | RAMIPS_GDM1_TCS_EN | RAMIPS_GDM1_UCS_EN | 0xffff), + RAMIPS_GDMA1_FWD_CFG); + ramips_fe_wr(ramips_fe_rr(RAMIPS_CDMA_CSG_CFG) & + ~(RAMIPS_ICS_GEN_EN | RAMIPS_TCS_GEN_EN | RAMIPS_UCS_GEN_EN), + RAMIPS_CDMA_CSG_CFG); + ramips_fe_wr(RAMIPS_PSE_FQFC_CFG_INIT, RAMIPS_PSE_FQ_CFG); + ramips_fe_wr(1, RAMIPS_FE_RST_GL); + ramips_fe_wr(0, RAMIPS_FE_RST_GL); + netif_start_queue(dev); + return 0; +} + +static int +ramips_eth_stop(struct net_device *dev) +{ + struct raeth_priv *priv = (struct raeth_priv*)netdev_priv(dev); + + ramips_fe_wr(RAMIPS_PDMA_GLO_CFG, ramips_fe_rr(RAMIPS_PDMA_GLO_CFG) & + ~(RAMIPS_TX_WB_DDONE | RAMIPS_RX_DMA_EN | RAMIPS_TX_DMA_EN)); + free_irq(dev->irq, dev); + netif_stop_queue(dev); + tasklet_kill(&priv->tx_housekeeping_tasklet); + tasklet_kill(&priv->rx_tasklet); + pci_free_consistent(NULL, NUM_TX_DESC * sizeof(struct ramips_tx_dma), + priv->tx, priv->phy_tx); + pci_free_consistent(NULL, NUM_RX_DESC * sizeof(struct ramips_rx_dma), + priv->rx, priv->phy_rx); + printk(KERN_INFO "ramips_eth: stopped\n"); + return 0; +} + +int __init +ramips_eth_probe(struct net_device *dev) +{ + struct sockaddr addr; + unsigned char mac_addr01234[5] = {0x00, 0x0C, 0x43, 0x28, 0x80}; + + /* reset frame engine */ + rt305x_sysc_wr(RAMIPS_FE_RESET_BIT, RAMIPS_FE_RESET); + rt305x_sysc_wr(0, RAMIPS_FE_RESET); + + net_srandom(jiffies); + memcpy(addr.sa_data, mac_addr01234, 5); + addr.sa_data[5] = net_random()&0xFF; + ramips_eth_set_mac_addr(dev, &addr); + + ether_setup(dev); + dev->open = ramips_eth_open; + dev->stop = ramips_eth_stop; + dev->hard_start_xmit = ramips_eth_hard_start_xmit; + dev->get_stats = ramips_eth_get_stats; + dev->set_mac_address = ramips_eth_set_mac_addr; + dev->mtu = MAX_RX_LENGTH; + dev->tx_timeout = ramips_eth_timeout; + dev->watchdog_timeo = TX_TIMEOUT; + return 0; +} + +int __init +ramips_eth_init(void) +{ + ramips_fe_base = ioremap_nocache(RT305X_FE_BASE, PAGE_SIZE); + if(!ramips_fe_base) + return -ENOMEM; + ramips_dev = alloc_etherdev(sizeof(struct raeth_priv)); + if(!ramips_dev) + return -ENOMEM; + strcpy(ramips_dev->name, "eth%d"); + ramips_dev->irq = RT305X_CPU_IRQ_FE; + ramips_dev->addr_len = ETH_ALEN; + ramips_dev->base_addr = (unsigned long)ramips_fe_base; + ramips_dev->init = ramips_eth_probe; + if(register_netdev(ramips_dev)) + { + printk(KERN_ERR "ramips_eth: error bringing up device\n"); + return -ENXIO; + } +#ifdef CONFIG_RALINK_RT305X + rt305x_esw_init(); +#endif + printk(KERN_INFO "ramips_eth: loaded\n"); + return 0; +} + +void +ramips_eth_cleanup(void) +{ + unregister_netdev(ramips_dev); + free_netdev(ramips_dev); + printk(KERN_INFO "ramips_eth: unloaded"); +} + +module_init(ramips_eth_init); +module_exit(ramips_eth_cleanup); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("John Crispin "); +MODULE_DESCRIPTION("ethernet driver for ramips boards"); -- cgit v1.2.3