454 lines
12 KiB
C
454 lines
12 KiB
C
/*
|
|
* Atheros AR71xx built-in ethernet mac driver
|
|
*
|
|
* Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
|
|
* Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
|
|
*
|
|
* Based on Atheros' AG7100 driver
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef __AG71XX_H
|
|
#define __AG71XX_H
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/version.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <linux/random.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/ethtool.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <linux/bitops.h>
|
|
|
|
#include <asm/mach-ar71xx/ar71xx.h>
|
|
#include <asm/mach-ar71xx/platform.h>
|
|
|
|
#define ETH_FCS_LEN 4
|
|
|
|
#define AG71XX_DRV_NAME "ag71xx"
|
|
#define AG71XX_DRV_VERSION "0.5.25"
|
|
|
|
#define AG71XX_NAPI_WEIGHT 64
|
|
#define AG71XX_OOM_REFILL (1 + HZ/10)
|
|
|
|
#define AG71XX_INT_ERR (AG71XX_INT_RX_BE | AG71XX_INT_TX_BE)
|
|
#define AG71XX_INT_TX (AG71XX_INT_TX_PS)
|
|
#define AG71XX_INT_RX (AG71XX_INT_RX_PR | AG71XX_INT_RX_OF)
|
|
|
|
#define AG71XX_INT_POLL (AG71XX_INT_RX | AG71XX_INT_TX)
|
|
#define AG71XX_INT_INIT (AG71XX_INT_ERR | AG71XX_INT_POLL)
|
|
|
|
#define AG71XX_TX_FIFO_LEN 2048
|
|
#define AG71XX_TX_MTU_LEN 1536
|
|
#define AG71XX_RX_PKT_RESERVE 64
|
|
#define AG71XX_RX_PKT_SIZE \
|
|
(AG71XX_RX_PKT_RESERVE + ETH_HLEN + ETH_FRAME_LEN + ETH_FCS_LEN)
|
|
|
|
#define AG71XX_TX_RING_SIZE 64
|
|
#define AG71XX_TX_THRES_STOP (AG71XX_TX_RING_SIZE - 4)
|
|
#define AG71XX_TX_THRES_WAKEUP \
|
|
(AG71XX_TX_RING_SIZE - (AG71XX_TX_RING_SIZE / 4))
|
|
|
|
#define AG71XX_RX_RING_SIZE 128
|
|
|
|
#ifdef CONFIG_AG71XX_DEBUG
|
|
#define DBG(fmt, args...) printk(KERN_DEBUG fmt, ## args)
|
|
#else
|
|
#define DBG(fmt, args...) do {} while (0)
|
|
#endif
|
|
|
|
#define ag71xx_assert(_cond) \
|
|
do { \
|
|
if (_cond) \
|
|
break; \
|
|
printk("%s,%d: assertion failed\n", __FILE__, __LINE__); \
|
|
BUG(); \
|
|
} while (0)
|
|
|
|
struct ag71xx_desc {
|
|
u32 data;
|
|
u32 ctrl;
|
|
#define DESC_EMPTY BIT(31)
|
|
#define DESC_MORE BIT(24)
|
|
#define DESC_PKTLEN_M 0xfff
|
|
u32 next;
|
|
u32 pad;
|
|
} __attribute__((aligned(4)));
|
|
|
|
struct ag71xx_buf {
|
|
struct sk_buff *skb;
|
|
struct ag71xx_desc *desc;
|
|
};
|
|
|
|
struct ag71xx_ring {
|
|
struct ag71xx_buf *buf;
|
|
u8 *descs_cpu;
|
|
dma_addr_t descs_dma;
|
|
unsigned int desc_size;
|
|
unsigned int curr;
|
|
unsigned int dirty;
|
|
unsigned int size;
|
|
};
|
|
|
|
struct ag71xx_mdio {
|
|
struct mii_bus *mii_bus;
|
|
int mii_irq[PHY_MAX_ADDR];
|
|
void __iomem *mdio_base;
|
|
struct ag71xx_mdio_platform_data *pdata;
|
|
};
|
|
|
|
struct ag71xx {
|
|
void __iomem *mac_base;
|
|
void __iomem *mii_ctrl;
|
|
|
|
spinlock_t lock;
|
|
struct platform_device *pdev;
|
|
struct net_device *dev;
|
|
struct napi_struct napi;
|
|
u32 msg_enable;
|
|
|
|
struct ag71xx_ring rx_ring;
|
|
struct ag71xx_ring tx_ring;
|
|
|
|
struct mii_bus *mii_bus;
|
|
struct phy_device *phy_dev;
|
|
|
|
unsigned int link;
|
|
unsigned int speed;
|
|
int duplex;
|
|
|
|
struct work_struct restart_work;
|
|
struct timer_list oom_timer;
|
|
};
|
|
|
|
extern struct ethtool_ops ag71xx_ethtool_ops;
|
|
|
|
extern struct ag71xx_mdio *ag71xx_mdio_bus;
|
|
int ag71xx_mdio_driver_init(void) __init;
|
|
void ag71xx_mdio_driver_exit(void);
|
|
|
|
int ag71xx_phy_connect(struct ag71xx *ag);
|
|
void ag71xx_phy_disconnect(struct ag71xx *ag);
|
|
void ag71xx_phy_start(struct ag71xx *ag);
|
|
void ag71xx_phy_stop(struct ag71xx *ag);
|
|
|
|
static inline struct ag71xx_platform_data *ag71xx_get_pdata(struct ag71xx *ag)
|
|
{
|
|
return ag->pdev->dev.platform_data;
|
|
}
|
|
|
|
static inline int ag71xx_desc_empty(struct ag71xx_desc *desc)
|
|
{
|
|
return ((desc->ctrl & DESC_EMPTY) != 0);
|
|
}
|
|
|
|
static inline int ag71xx_desc_pktlen(struct ag71xx_desc *desc)
|
|
{
|
|
return (desc->ctrl & DESC_PKTLEN_M);
|
|
}
|
|
|
|
/* Register offsets */
|
|
#define AG71XX_REG_MAC_CFG1 0x0000
|
|
#define AG71XX_REG_MAC_CFG2 0x0004
|
|
#define AG71XX_REG_MAC_IPG 0x0008
|
|
#define AG71XX_REG_MAC_HDX 0x000c
|
|
#define AG71XX_REG_MAC_MFL 0x0010
|
|
#define AG71XX_REG_MII_CFG 0x0020
|
|
#define AG71XX_REG_MII_CMD 0x0024
|
|
#define AG71XX_REG_MII_ADDR 0x0028
|
|
#define AG71XX_REG_MII_CTRL 0x002c
|
|
#define AG71XX_REG_MII_STATUS 0x0030
|
|
#define AG71XX_REG_MII_IND 0x0034
|
|
#define AG71XX_REG_MAC_IFCTL 0x0038
|
|
#define AG71XX_REG_MAC_ADDR1 0x0040
|
|
#define AG71XX_REG_MAC_ADDR2 0x0044
|
|
#define AG71XX_REG_FIFO_CFG0 0x0048
|
|
#define AG71XX_REG_FIFO_CFG1 0x004c
|
|
#define AG71XX_REG_FIFO_CFG2 0x0050
|
|
#define AG71XX_REG_FIFO_CFG3 0x0054
|
|
#define AG71XX_REG_FIFO_CFG4 0x0058
|
|
#define AG71XX_REG_FIFO_CFG5 0x005c
|
|
#define AG71XX_REG_FIFO_RAM0 0x0060
|
|
#define AG71XX_REG_FIFO_RAM1 0x0064
|
|
#define AG71XX_REG_FIFO_RAM2 0x0068
|
|
#define AG71XX_REG_FIFO_RAM3 0x006c
|
|
#define AG71XX_REG_FIFO_RAM4 0x0070
|
|
#define AG71XX_REG_FIFO_RAM5 0x0074
|
|
#define AG71XX_REG_FIFO_RAM6 0x0078
|
|
#define AG71XX_REG_FIFO_RAM7 0x007c
|
|
|
|
#define AG71XX_REG_TX_CTRL 0x0180
|
|
#define AG71XX_REG_TX_DESC 0x0184
|
|
#define AG71XX_REG_TX_STATUS 0x0188
|
|
#define AG71XX_REG_RX_CTRL 0x018c
|
|
#define AG71XX_REG_RX_DESC 0x0190
|
|
#define AG71XX_REG_RX_STATUS 0x0194
|
|
#define AG71XX_REG_INT_ENABLE 0x0198
|
|
#define AG71XX_REG_INT_STATUS 0x019c
|
|
|
|
#define MAC_CFG1_TXE BIT(0) /* Tx Enable */
|
|
#define MAC_CFG1_STX BIT(1) /* Synchronize Tx Enable */
|
|
#define MAC_CFG1_RXE BIT(2) /* Rx Enable */
|
|
#define MAC_CFG1_SRX BIT(3) /* Synchronize Rx Enable */
|
|
#define MAC_CFG1_TFC BIT(4) /* Tx Flow Control Enable */
|
|
#define MAC_CFG1_RFC BIT(5) /* Rx Flow Control Enable */
|
|
#define MAC_CFG1_LB BIT(8) /* Loopback mode */
|
|
#define MAC_CFG1_SR BIT(31) /* Soft Reset */
|
|
|
|
#define MAC_CFG2_FDX BIT(0)
|
|
#define MAC_CFG2_CRC_EN BIT(1)
|
|
#define MAC_CFG2_PAD_CRC_EN BIT(2)
|
|
#define MAC_CFG2_LEN_CHECK BIT(4)
|
|
#define MAC_CFG2_HUGE_FRAME_EN BIT(5)
|
|
#define MAC_CFG2_IF_1000 BIT(9)
|
|
#define MAC_CFG2_IF_10_100 BIT(8)
|
|
|
|
#define FIFO_CFG0_WTM BIT(0) /* Watermark Module */
|
|
#define FIFO_CFG0_RXS BIT(1) /* Rx System Module */
|
|
#define FIFO_CFG0_RXF BIT(2) /* Rx Fabric Module */
|
|
#define FIFO_CFG0_TXS BIT(3) /* Tx System Module */
|
|
#define FIFO_CFG0_TXF BIT(4) /* Tx Fabric Module */
|
|
#define FIFO_CFG0_ALL (FIFO_CFG0_WTM | FIFO_CFG0_RXS | FIFO_CFG0_RXF \
|
|
| FIFO_CFG0_TXS | FIFO_CFG0_TXF)
|
|
|
|
#define FIFO_CFG0_ENABLE_SHIFT 8
|
|
|
|
#define FIFO_CFG4_DE BIT(0) /* Drop Event */
|
|
#define FIFO_CFG4_DV BIT(1) /* RX_DV Event */
|
|
#define FIFO_CFG4_FC BIT(2) /* False Carrier */
|
|
#define FIFO_CFG4_CE BIT(3) /* Code Error */
|
|
#define FIFO_CFG4_CR BIT(4) /* CRC error */
|
|
#define FIFO_CFG4_LM BIT(5) /* Length Mismatch */
|
|
#define FIFO_CFG4_LO BIT(6) /* Length out of range */
|
|
#define FIFO_CFG4_OK BIT(7) /* Packet is OK */
|
|
#define FIFO_CFG4_MC BIT(8) /* Multicast Packet */
|
|
#define FIFO_CFG4_BC BIT(9) /* Broadcast Packet */
|
|
#define FIFO_CFG4_DR BIT(10) /* Dribble */
|
|
#define FIFO_CFG4_LE BIT(11) /* Long Event */
|
|
#define FIFO_CFG4_CF BIT(12) /* Control Frame */
|
|
#define FIFO_CFG4_PF BIT(13) /* Pause Frame */
|
|
#define FIFO_CFG4_UO BIT(14) /* Unsupported Opcode */
|
|
#define FIFO_CFG4_VT BIT(15) /* VLAN tag detected */
|
|
#define FIFO_CFG4_FT BIT(16) /* Frame Truncated */
|
|
#define FIFO_CFG4_UC BIT(17) /* Unicast Packet */
|
|
|
|
#define FIFO_CFG5_DE BIT(0) /* Drop Event */
|
|
#define FIFO_CFG5_DV BIT(1) /* RX_DV Event */
|
|
#define FIFO_CFG5_FC BIT(2) /* False Carrier */
|
|
#define FIFO_CFG5_CE BIT(3) /* Code Error */
|
|
#define FIFO_CFG5_LM BIT(4) /* Length Mismatch */
|
|
#define FIFO_CFG5_LO BIT(5) /* Length Out of Range */
|
|
#define FIFO_CFG5_OK BIT(6) /* Packet is OK */
|
|
#define FIFO_CFG5_MC BIT(7) /* Multicast Packet */
|
|
#define FIFO_CFG5_BC BIT(8) /* Broadcast Packet */
|
|
#define FIFO_CFG5_DR BIT(9) /* Dribble */
|
|
#define FIFO_CFG5_CF BIT(10) /* Control Frame */
|
|
#define FIFO_CFG5_PF BIT(11) /* Pause Frame */
|
|
#define FIFO_CFG5_UO BIT(12) /* Unsupported Opcode */
|
|
#define FIFO_CFG5_VT BIT(13) /* VLAN tag detected */
|
|
#define FIFO_CFG5_LE BIT(14) /* Long Event */
|
|
#define FIFO_CFG5_FT BIT(15) /* Frame Truncated */
|
|
#define FIFO_CFG5_16 BIT(16) /* unknown */
|
|
#define FIFO_CFG5_17 BIT(17) /* unknown */
|
|
#define FIFO_CFG5_SF BIT(18) /* Short Frame */
|
|
#define FIFO_CFG5_BM BIT(19) /* Byte Mode */
|
|
|
|
#define AG71XX_INT_TX_PS BIT(0)
|
|
#define AG71XX_INT_TX_UR BIT(1)
|
|
#define AG71XX_INT_TX_BE BIT(3)
|
|
#define AG71XX_INT_RX_PR BIT(4)
|
|
#define AG71XX_INT_RX_OF BIT(6)
|
|
#define AG71XX_INT_RX_BE BIT(7)
|
|
|
|
#define MAC_IFCTL_SPEED BIT(16)
|
|
|
|
#define MII_CFG_CLK_DIV_4 0
|
|
#define MII_CFG_CLK_DIV_6 2
|
|
#define MII_CFG_CLK_DIV_8 3
|
|
#define MII_CFG_CLK_DIV_10 4
|
|
#define MII_CFG_CLK_DIV_14 5
|
|
#define MII_CFG_CLK_DIV_20 6
|
|
#define MII_CFG_CLK_DIV_28 7
|
|
#define MII_CFG_RESET BIT(31)
|
|
|
|
#define MII_CMD_WRITE 0x0
|
|
#define MII_CMD_READ 0x1
|
|
#define MII_ADDR_SHIFT 8
|
|
#define MII_IND_BUSY BIT(0)
|
|
#define MII_IND_INVALID BIT(2)
|
|
|
|
#define TX_CTRL_TXE BIT(0) /* Tx Enable */
|
|
|
|
#define TX_STATUS_PS BIT(0) /* Packet Sent */
|
|
#define TX_STATUS_UR BIT(1) /* Tx Underrun */
|
|
#define TX_STATUS_BE BIT(3) /* Bus Error */
|
|
|
|
#define RX_CTRL_RXE BIT(0) /* Rx Enable */
|
|
|
|
#define RX_STATUS_PR BIT(0) /* Packet Received */
|
|
#define RX_STATUS_OF BIT(2) /* Rx Overflow */
|
|
#define RX_STATUS_BE BIT(3) /* Bus Error */
|
|
|
|
#define MII_CTRL_IF_MASK 3
|
|
#define MII_CTRL_SPEED_SHIFT 4
|
|
#define MII_CTRL_SPEED_MASK 3
|
|
#define MII_CTRL_SPEED_10 0
|
|
#define MII_CTRL_SPEED_100 1
|
|
#define MII_CTRL_SPEED_1000 2
|
|
|
|
static inline void ag71xx_wr(struct ag71xx *ag, unsigned reg, u32 value)
|
|
{
|
|
void __iomem *r;
|
|
|
|
switch (reg) {
|
|
case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
|
|
case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
|
|
r = ag->mac_base + reg;
|
|
__raw_writel(value, r);
|
|
|
|
/* flush write */
|
|
(void) __raw_readl(r);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
static inline u32 ag71xx_rr(struct ag71xx *ag, unsigned reg)
|
|
{
|
|
void __iomem *r;
|
|
u32 ret;
|
|
|
|
switch (reg) {
|
|
case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
|
|
case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
|
|
r = ag->mac_base + reg;
|
|
ret = __raw_readl(r);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline void ag71xx_sb(struct ag71xx *ag, unsigned reg, u32 mask)
|
|
{
|
|
void __iomem *r;
|
|
|
|
switch (reg) {
|
|
case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
|
|
case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
|
|
r = ag->mac_base + reg;
|
|
__raw_writel(__raw_readl(r) | mask, r);
|
|
|
|
/* flush write */
|
|
(void)__raw_readl(r);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
static inline void ag71xx_cb(struct ag71xx *ag, unsigned reg, u32 mask)
|
|
{
|
|
void __iomem *r;
|
|
|
|
switch (reg) {
|
|
case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
|
|
case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_INT_STATUS:
|
|
r = ag->mac_base + reg;
|
|
__raw_writel(__raw_readl(r) & ~mask, r);
|
|
|
|
/* flush write */
|
|
(void) __raw_readl(r);
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
static inline void ag71xx_int_enable(struct ag71xx *ag, u32 ints)
|
|
{
|
|
ag71xx_sb(ag, AG71XX_REG_INT_ENABLE, ints);
|
|
}
|
|
|
|
static inline void ag71xx_int_disable(struct ag71xx *ag, u32 ints)
|
|
{
|
|
ag71xx_cb(ag, AG71XX_REG_INT_ENABLE, ints);
|
|
}
|
|
|
|
static inline void ag71xx_mii_ctrl_wr(struct ag71xx *ag, u32 value)
|
|
{
|
|
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
|
|
|
|
if (pdata->is_ar724x)
|
|
return;
|
|
|
|
__raw_writel(value, ag->mii_ctrl);
|
|
|
|
/* flush write */
|
|
__raw_readl(ag->mii_ctrl);
|
|
}
|
|
|
|
static inline u32 ag71xx_mii_ctrl_rr(struct ag71xx *ag)
|
|
{
|
|
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
|
|
|
|
if (pdata->is_ar724x)
|
|
return 0xffffffff;
|
|
|
|
return __raw_readl(ag->mii_ctrl);
|
|
}
|
|
|
|
static void inline ag71xx_mii_ctrl_set_if(struct ag71xx *ag,
|
|
unsigned int mii_if)
|
|
{
|
|
u32 t;
|
|
|
|
t = ag71xx_mii_ctrl_rr(ag);
|
|
t &= ~(MII_CTRL_IF_MASK);
|
|
t |= (mii_if & MII_CTRL_IF_MASK);
|
|
ag71xx_mii_ctrl_wr(ag, t);
|
|
}
|
|
|
|
static void inline ag71xx_mii_ctrl_set_speed(struct ag71xx *ag,
|
|
unsigned int speed)
|
|
{
|
|
u32 t;
|
|
|
|
t = ag71xx_mii_ctrl_rr(ag);
|
|
t &= ~(MII_CTRL_SPEED_MASK << MII_CTRL_SPEED_SHIFT);
|
|
t |= (speed & MII_CTRL_SPEED_MASK) << MII_CTRL_SPEED_SHIFT;
|
|
ag71xx_mii_ctrl_wr(ag, t);
|
|
}
|
|
|
|
#ifdef CONFIG_AG71XX_AR8216_SUPPORT
|
|
void ag71xx_add_ar8216_header(struct ag71xx *ag, struct sk_buff *skb);
|
|
int ag71xx_remove_ar8216_header(struct ag71xx *ag, struct sk_buff *skb);
|
|
#else
|
|
static inline void ag71xx_add_ar8216_header(struct ag71xx *ag,
|
|
struct sk_buff *skb)
|
|
{
|
|
}
|
|
|
|
static inline int ag71xx_remove_ar8216_header(struct ag71xx *ag,
|
|
struct sk_buff *skb)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#endif /* _AG71XX_H */
|