[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

2 files changed, 506 insertions, 0 deletions

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 <blogic@openwrt.org>
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/if_vlan.h>
+#include <linux/if_ether.h>
+#include <asm/uaccess.h>
+#include <net/sock.h>
+#include <asm/uaccess.h>
+
+#include <rt305x.h>
+#include <rt305x_regs.h>
+#include <eth.h>
+
+#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 <blogic@openwrt.org>");
+MODULE_DESCRIPTION("ethernet driver for ramips boards");
diff --git a/target/linux/ramips/files/drivers/net/ramips_esw.c b/target/linux/ramips/files/drivers/net/ramips_esw.c
new file mode 100644
index 000000000..58bbc3faa
--- /dev/null
+++ b/target/linux/ramips/files/drivers/net/ramips_esw.c
@@ -0,0 +1,119 @@
+#define GPIO_PRUPOSE           0x60
+#define GPIO_MDIO_BIT          (1<<7)
+#define RT305X_ESW_PHY_WRITE		(1 << 13)
+#define RT305X_ESW_PHY_TOUT			(5 * HZ)
+#define RT305X_ESW_PHY_CONTROL_0	0xC0
+#define RT305X_ESW_PHY_CONTROL_1	0xC4
+
+static void __iomem *ramips_esw_base = 0;
+
+static inline void
+ramips_esw_wr(u32 val, unsigned reg)
+{
+	__raw_writel(val, ramips_esw_base + reg);
+}
+
+static inline u32
+ramips_esw_rr(unsigned reg)
+{
+	return __raw_readl(ramips_esw_base + reg);
+}
+
+static void
+ramips_enable_mdio(int s)
+{
+	u32 gpio = rt305x_sysc_rr(GPIO_PRUPOSE);
+	if(s)
+		gpio &= ~GPIO_MDIO_BIT;
+	else
+		gpio |= GPIO_MDIO_BIT;
+	rt305x_sysc_wr(gpio, GPIO_PRUPOSE);
+}
+
+u32
+mii_mgr_write(u32 phy_addr, u32 phy_register, u32 write_data)
+{
+	unsigned long volatile t_start = jiffies;
+	int ret = 0;
+
+	ramips_enable_mdio(1);
+	while(1)
+	{
+		if(!(ramips_esw_rr(RT305X_ESW_PHY_CONTROL_1) & (0x1 << 0)))
+			break;
+		if(time_after(jiffies, t_start + RT305X_ESW_PHY_TOUT))
+		{
+			ret = 1;
+			goto out;
+		}
+	}
+	ramips_esw_wr(((write_data & 0xFFFF) << 16) | (phy_register << 8) |
+		(phy_addr) | RT305X_ESW_PHY_WRITE, RT305X_ESW_PHY_CONTROL_0);
+	t_start = jiffies;
+	while(1)
+	{
+		if(ramips_esw_rr(RT305X_ESW_PHY_CONTROL_1) & (0x1 << 0))
+			break;
+		if(time_after(jiffies, t_start + RT305X_ESW_PHY_TOUT))
+		{
+			ret = 1;
+			break;
+		}
+	}
+out:
+	ramips_enable_mdio(0);
+	if(ret)
+		printk(KERN_ERR "ramips_eth: MDIO timeout\n");
+	return ret;
+}
+
+static int
+rt305x_esw_init(void)
+{
+	int i;
+
+	ramips_esw_base = ioremap_nocache(RT305X_SWITCH_BASE, PAGE_SIZE);
+	if(!ramips_esw_base)
+		return -ENOMEM;
+
+	/* vodoo from original driver */
+	ramips_esw_wr(0xC8A07850, 0x08);
+	ramips_esw_wr(0x00000000, 0xe4);
+	ramips_esw_wr(0x00405555, 0x14);
+	ramips_esw_wr(0x00002001, 0x50);
+	ramips_esw_wr(0x00007f7f, 0x90);
+	ramips_esw_wr(0x00007f3f, 0x98);
+	ramips_esw_wr(0x00d6500c, 0xcc);
+	ramips_esw_wr(0x0008a301, 0x9c);
+	ramips_esw_wr(0x02404040, 0x8c);
+	ramips_esw_wr(0x00001002, 0x48);
+	ramips_esw_wr(0x3f502b28, 0xc8);
+	ramips_esw_wr(0x00000000, 0x84);
+
+	mii_mgr_write(0, 31, 0x8000);
+	for(i = 0; i < 5; i++)
+	{
+		mii_mgr_write(i, 0, 0x3100);   //TX10 waveform coefficient
+		mii_mgr_write(i, 26, 0x1601);   //TX10 waveform coefficient
+		mii_mgr_write(i, 29, 0x7058);   //TX100/TX10 AD/DA current bias
+		mii_mgr_write(i, 30, 0x0018);   //TX100 slew rate control
+	}
+	/* PHY IOT */
+	mii_mgr_write(0, 31, 0x0);      //select global register
+	mii_mgr_write(0, 22, 0x052f);   //tune TP_IDL tail and head waveform
+	mii_mgr_write(0, 17, 0x0fe0);   //set TX10 signal amplitude threshold to minimum
+	mii_mgr_write(0, 18, 0x40ba);   //set squelch amplitude to higher threshold
+	mii_mgr_write(0, 14, 0x65);     //longer TP_IDL tail length
+	mii_mgr_write(0, 31, 0x8000);   //select local register
+
+	/* Port 5 Disabled */
+	rt305x_sysc_wr(rt305x_sysc_rr(0x60) | (1 << 9), 0x60); //set RGMII to GPIO mode (GPIO41-GPIO50)
+	rt305x_sysc_wr(0xfff, 0x674); //GPIO41-GPIO50 output mode
+	rt305x_sysc_wr(0x0, 0x670); //GPIO41-GPIO50 output low
+
+	/* set default vlan */
+	ramips_esw_wr(0x2001, 0x50);
+	ramips_esw_wr(0x5041, 0x70);
+
+	return 0;
+}