Initial commit

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/Kconfig

@@ -0,0 +1,33 @@
+config AG71XX
+	tristate "Atheros AR7XXX/AR9XXX built-in ethernet mac support"
+	depends on ATH79
+	select PHYLIB
+	help
+	  If you wish to compile a kernel for AR7XXX/91XXX and enable
+	  ethernet support, then you should always answer Y to this.
+
+if AG71XX
+
+config AG71XX_DEBUG
+	bool "Atheros AR71xx built-in ethernet driver debugging"
+	default n
+	help
+	  Atheros AR71xx built-in ethernet driver debugging messages.
+
+config AG71XX_DEBUG_FS
+	bool "Atheros AR71xx built-in ethernet driver debugfs support"
+	depends on DEBUG_FS
+	default n
+	help
+	  Say Y, if you need access to various statistics provided by
+	  the ag71xx driver.
+
+config AG71XX_AR8216_SUPPORT
+	bool "special support for the Atheros AR8216 switch"
+	default n
+	default y if ATH79_MACH_WNR2000 || ATH79_MACH_MZK_W04NU
+	help
+	  Say 'y' here if you want to enable special support for the
+	  Atheros AR8216 switch found on some boards.
+
+endif

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/Makefile

@@ -0,0 +1,15 @@
+#
+# Makefile for the Atheros AR71xx built-in ethernet macs
+#
+
+ag71xx-y	+= ag71xx_main.o
+ag71xx-y	+= ag71xx_ethtool.o
+ag71xx-y	+= ag71xx_phy.o
+ag71xx-y	+= ag71xx_mdio.o
+ag71xx-y	+= ag71xx_ar7240.o
+
+ag71xx-$(CONFIG_AG71XX_DEBUG_FS)	+= ag71xx_debugfs.o
+ag71xx-$(CONFIG_AG71XX_AR8216_SUPPORT)	+= ag71xx_ar8216.o
+
+obj-$(CONFIG_AG71XX)	+= ag71xx.o
+

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h

@@ -0,0 +1,508 @@
+/*
+ *  Atheros AR71xx built-in ethernet mac driver
+ *
+ *  Copyright (C) 2008-2010 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/if_vlan.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-ath79/ar71xx_regs.h>
+#include <asm/mach-ath79/ath79.h>
+#include <asm/mach-ath79/ag71xx_platform.h>
+
+#define AG71XX_DRV_NAME		"ag71xx"
+#define AG71XX_DRV_VERSION	"0.5.35"
+
+/*
+ * For our NAPI weight bigger does *NOT* mean better - it means more
+ * D-cache misses and lots more wasted cycles than we'll ever
+ * possibly gain from saving instructions.
+ */
+#define AG71XX_NAPI_WEIGHT	32
+#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_MTU_LEN	1540
+
+#define AG71XX_TX_RING_SPLIT		512
+#define AG71XX_TX_RING_DS_PER_PKT	DIV_ROUND_UP(AG71XX_TX_MTU_LEN, \
+						     AG71XX_TX_RING_SPLIT)
+#define AG71XX_TX_RING_SIZE_DEFAULT	128
+#define AG71XX_RX_RING_SIZE_DEFAULT	256
+
+#define AG71XX_TX_RING_SIZE_MAX		128
+#define AG71XX_RX_RING_SIZE_MAX		256
+
+#define QCA955X_SGMII_LINK_WAR_MAX_TRY	10
+
+#ifdef CONFIG_AG71XX_DEBUG
+#define DBG(fmt, args...)	pr_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)));
+
+#define AG71XX_DESC_SIZE	roundup(sizeof(struct ag71xx_desc), \
+					L1_CACHE_BYTES)
+
+struct ag71xx_buf {
+	union {
+		struct sk_buff	*skb;
+		void		*rx_buf;
+	};
+	union {
+		dma_addr_t	dma_addr;
+		unsigned int		len;
+	};
+};
+
+struct ag71xx_ring {
+	struct ag71xx_buf	*buf;
+	u8			*descs_cpu;
+	dma_addr_t		descs_dma;
+	u16			desc_split;
+	u16			order;
+	unsigned int		curr;
+	unsigned int		dirty;
+};
+
+struct ag71xx_mdio {
+	struct mii_bus		*mii_bus;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
+	int			mii_irq[PHY_MAX_ADDR];
+#endif
+	void __iomem		*mdio_base;
+	struct ag71xx_mdio_platform_data *pdata;
+};
+
+struct ag71xx_int_stats {
+	unsigned long		rx_pr;
+	unsigned long		rx_be;
+	unsigned long		rx_of;
+	unsigned long		tx_ps;
+	unsigned long		tx_be;
+	unsigned long		tx_ur;
+	unsigned long		total;
+};
+
+struct ag71xx_napi_stats {
+	unsigned long		napi_calls;
+	unsigned long		rx_count;
+	unsigned long		rx_packets;
+	unsigned long		rx_packets_max;
+	unsigned long		tx_count;
+	unsigned long		tx_packets;
+	unsigned long		tx_packets_max;
+
+	unsigned long		rx[AG71XX_NAPI_WEIGHT + 1];
+	unsigned long		tx[AG71XX_NAPI_WEIGHT + 1];
+};
+
+struct ag71xx_debug {
+	struct dentry		*debugfs_dir;
+
+	struct ag71xx_int_stats int_stats;
+	struct ag71xx_napi_stats napi_stats;
+};
+
+struct ag71xx {
+	/*
+	 * Critical data related to the per-packet data path are clustered
+	 * early in this structure to help improve the D-cache footprint.
+	 */
+	struct ag71xx_ring	rx_ring ____cacheline_aligned;
+	struct ag71xx_ring	tx_ring ____cacheline_aligned;
+
+	unsigned int            max_frame_len;
+	unsigned int            desc_pktlen_mask;
+	unsigned int            rx_buf_size;
+
+	struct net_device	*dev;
+	struct platform_device  *pdev;
+	spinlock_t		lock;
+	struct napi_struct	napi;
+	u32			msg_enable;
+
+	/*
+	 * From this point onwards we're not looking at per-packet fields.
+	 */
+	void __iomem		*mac_base;
+
+	struct ag71xx_desc	*stop_desc;
+	dma_addr_t		stop_desc_dma;
+
+	struct mii_bus		*mii_bus;
+	struct phy_device	*phy_dev;
+	void			*phy_priv;
+
+	unsigned int		link;
+	unsigned int		speed;
+	int			duplex;
+
+	struct delayed_work	restart_work;
+	struct delayed_work	link_work;
+	struct timer_list	oom_timer;
+
+#ifdef CONFIG_AG71XX_DEBUG_FS
+	struct ag71xx_debug	debug;
+#endif
+};
+
+extern struct ethtool_ops ag71xx_ethtool_ops;
+void ag71xx_link_adjust(struct ag71xx *ag);
+
+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 struct ag71xx_desc *
+ag71xx_ring_desc(struct ag71xx_ring *ring, int idx)
+{
+	return (struct ag71xx_desc *) &ring->descs_cpu[idx * AG71XX_DESC_SIZE];
+}
+
+static inline int
+ag71xx_ring_size_order(int size)
+{
+	return fls(size - 1);
+}
+
+/* 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 AG71XX_REG_FIFO_DEPTH	0x01a8
+#define AG71XX_REG_RX_SM	0x01b0
+#define AG71XX_REG_TX_SM	0x01b4
+
+#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_CLK_DIV_34	8
+#define MII_CFG_CLK_DIV_42	9
+#define MII_CFG_CLK_DIV_50	10
+#define MII_CFG_CLK_DIV_58	11
+#define MII_CFG_CLK_DIV_66	12
+#define MII_CFG_CLK_DIV_74	13
+#define MII_CFG_CLK_DIV_82	14
+#define MII_CFG_CLK_DIV_98	15
+#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 */
+
+static inline void ag71xx_check_reg_offset(struct ag71xx *ag, unsigned reg)
+{
+	switch (reg) {
+	case AG71XX_REG_MAC_CFG1 ... AG71XX_REG_MAC_MFL:
+	case AG71XX_REG_MAC_IFCTL ... AG71XX_REG_TX_SM:
+	case AG71XX_REG_MII_CFG:
+		break;
+
+	default:
+		BUG();
+	}
+}
+
+static inline void ag71xx_wr(struct ag71xx *ag, unsigned reg, u32 value)
+{
+	ag71xx_check_reg_offset(ag, reg);
+
+	__raw_writel(value, ag->mac_base + reg);
+	/* flush write */
+	(void) __raw_readl(ag->mac_base + reg);
+}
+
+static inline u32 ag71xx_rr(struct ag71xx *ag, unsigned reg)
+{
+	ag71xx_check_reg_offset(ag, reg);
+
+	return __raw_readl(ag->mac_base + reg);
+}
+
+static inline void ag71xx_sb(struct ag71xx *ag, unsigned reg, u32 mask)
+{
+	void __iomem *r;
+
+	ag71xx_check_reg_offset(ag, reg);
+
+	r = ag->mac_base + reg;
+	__raw_writel(__raw_readl(r) | mask, r);
+	/* flush write */
+	(void)__raw_readl(r);
+}
+
+static inline void ag71xx_cb(struct ag71xx *ag, unsigned reg, u32 mask)
+{
+	void __iomem *r;
+
+	ag71xx_check_reg_offset(ag, reg);
+
+	r = ag->mac_base + reg;
+	__raw_writel(__raw_readl(r) & ~mask, r);
+	/* flush write */
+	(void) __raw_readl(r);
+}
+
+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);
+}
+
+#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,
+				int pktlen);
+static inline int ag71xx_has_ar8216(struct ag71xx *ag)
+{
+	return ag71xx_get_pdata(ag)->has_ar8216;
+}
+#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,
+					      int pktlen)
+{
+	return 0;
+}
+static inline int ag71xx_has_ar8216(struct ag71xx *ag)
+{
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_AG71XX_DEBUG_FS
+int ag71xx_debugfs_root_init(void);
+void ag71xx_debugfs_root_exit(void);
+int ag71xx_debugfs_init(struct ag71xx *ag);
+void ag71xx_debugfs_exit(struct ag71xx *ag);
+void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status);
+void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx);
+#else
+static inline int ag71xx_debugfs_root_init(void) { return 0; }
+static inline void ag71xx_debugfs_root_exit(void) {}
+static inline int ag71xx_debugfs_init(struct ag71xx *ag) { return 0; }
+static inline void ag71xx_debugfs_exit(struct ag71xx *ag) {}
+static inline void ag71xx_debugfs_update_int_stats(struct ag71xx *ag,
+						   u32 status) {}
+static inline void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag,
+						    int rx, int tx) {}
+#endif /* CONFIG_AG71XX_DEBUG_FS */
+
+void ag71xx_ar7240_start(struct ag71xx *ag);
+void ag71xx_ar7240_stop(struct ag71xx *ag);
+int ag71xx_ar7240_init(struct ag71xx *ag);
+void ag71xx_ar7240_cleanup(struct ag71xx *ag);
+
+int ag71xx_mdio_mii_read(struct ag71xx_mdio *am, int addr, int reg);
+void ag71xx_mdio_mii_write(struct ag71xx_mdio *am, int addr, int reg, u16 val);
+
+u16 ar7240sw_phy_read(struct mii_bus *mii, unsigned phy_addr,
+		      unsigned reg_addr);
+int ar7240sw_phy_write(struct mii_bus *mii, unsigned phy_addr,
+		       unsigned reg_addr, u16 reg_val);
+
+#endif /* _AG71XX_H */

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_ar8216.c

@@ -0,0 +1,44 @@
+/*
+ *  Atheros AR71xx built-in ethernet mac driver
+ *  Special support for the Atheros ar8216 switch chip
+ *
+ *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@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.
+ */
+
+#include "ag71xx.h"
+
+#define AR8216_PACKET_TYPE_MASK		0xf
+#define AR8216_PACKET_TYPE_NORMAL	0
+
+#define AR8216_HEADER_LEN	2
+
+void ag71xx_add_ar8216_header(struct ag71xx *ag, struct sk_buff *skb)
+{
+	skb_push(skb, AR8216_HEADER_LEN);
+	skb->data[0] = 0x10;
+	skb->data[1] = 0x80;
+}
+
+int ag71xx_remove_ar8216_header(struct ag71xx *ag, struct sk_buff *skb,
+				int pktlen)
+{
+	u8 type;
+
+	type = skb->data[1] & AR8216_PACKET_TYPE_MASK;
+	switch (type) {
+	case AR8216_PACKET_TYPE_NORMAL:
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	skb_pull(skb, AR8216_HEADER_LEN);
+	return 0;
+}

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_debugfs.c

@@ -0,0 +1,285 @@
+/*
+ *  Atheros AR71xx built-in ethernet mac driver
+ *
+ *  Copyright (C) 2008-2010 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.
+ */
+
+#include <linux/debugfs.h>
+
+#include "ag71xx.h"
+
+static struct dentry *ag71xx_debugfs_root;
+
+static int ag71xx_debugfs_generic_open(struct inode *inode, struct file *file)
+{
+	file->private_data = inode->i_private;
+	return 0;
+}
+
+void ag71xx_debugfs_update_int_stats(struct ag71xx *ag, u32 status)
+{
+	if (status)
+		ag->debug.int_stats.total++;
+	if (status & AG71XX_INT_TX_PS)
+		ag->debug.int_stats.tx_ps++;
+	if (status & AG71XX_INT_TX_UR)
+		ag->debug.int_stats.tx_ur++;
+	if (status & AG71XX_INT_TX_BE)
+		ag->debug.int_stats.tx_be++;
+	if (status & AG71XX_INT_RX_PR)
+		ag->debug.int_stats.rx_pr++;
+	if (status & AG71XX_INT_RX_OF)
+		ag->debug.int_stats.rx_of++;
+	if (status & AG71XX_INT_RX_BE)
+		ag->debug.int_stats.rx_be++;
+}
+
+static ssize_t read_file_int_stats(struct file *file, char __user *user_buf,
+				   size_t count, loff_t *ppos)
+{
+#define PR_INT_STAT(_label, _field)					\
+	len += snprintf(buf + len, sizeof(buf) - len,			\
+		"%20s: %10lu\n", _label, ag->debug.int_stats._field);
+
+	struct ag71xx *ag = file->private_data;
+	char buf[256];
+	unsigned int len = 0;
+
+	PR_INT_STAT("TX Packet Sent", tx_ps);
+	PR_INT_STAT("TX Underrun", tx_ur);
+	PR_INT_STAT("TX Bus Error", tx_be);
+	PR_INT_STAT("RX Packet Received", rx_pr);
+	PR_INT_STAT("RX Overflow", rx_of);
+	PR_INT_STAT("RX Bus Error", rx_be);
+	len += snprintf(buf + len, sizeof(buf) - len, "\n");
+	PR_INT_STAT("Total", total);
+
+	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
+#undef PR_INT_STAT
+}
+
+static const struct file_operations ag71xx_fops_int_stats = {
+	.open	= ag71xx_debugfs_generic_open,
+	.read	= read_file_int_stats,
+	.owner	= THIS_MODULE
+};
+
+void ag71xx_debugfs_update_napi_stats(struct ag71xx *ag, int rx, int tx)
+{
+	struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
+
+	if (rx) {
+		stats->rx_count++;
+		stats->rx_packets += rx;
+		if (rx <= AG71XX_NAPI_WEIGHT)
+			stats->rx[rx]++;
+		if (rx > stats->rx_packets_max)
+			stats->rx_packets_max = rx;
+	}
+
+	if (tx) {
+		stats->tx_count++;
+		stats->tx_packets += tx;
+		if (tx <= AG71XX_NAPI_WEIGHT)
+			stats->tx[tx]++;
+		if (tx > stats->tx_packets_max)
+			stats->tx_packets_max = tx;
+	}
+}
+
+static ssize_t read_file_napi_stats(struct file *file, char __user *user_buf,
+				    size_t count, loff_t *ppos)
+{
+	struct ag71xx *ag = file->private_data;
+	struct ag71xx_napi_stats *stats = &ag->debug.napi_stats;
+	char *buf;
+	unsigned int buflen;
+	unsigned int len = 0;
+	unsigned long rx_avg = 0;
+	unsigned long tx_avg = 0;
+	int ret;
+	int i;
+
+	buflen = 2048;
+	buf = kmalloc(buflen, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	if (stats->rx_count)
+		rx_avg = stats->rx_packets / stats->rx_count;
+
+	if (stats->tx_count)
+		tx_avg = stats->tx_packets / stats->tx_count;
+
+	len += snprintf(buf + len, buflen - len, "%3s  %10s %10s\n",
+			"len", "rx", "tx");
+
+	for (i = 1; i <= AG71XX_NAPI_WEIGHT; i++)
+		len += snprintf(buf + len, buflen - len,
+				"%3d: %10lu %10lu\n",
+				i, stats->rx[i], stats->tx[i]);
+
+	len += snprintf(buf + len, buflen - len, "\n");
+
+	len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
+			"sum", stats->rx_count, stats->tx_count);
+	len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
+			"avg", rx_avg, tx_avg);
+	len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
+			"max", stats->rx_packets_max, stats->tx_packets_max);
+	len += snprintf(buf + len, buflen - len, "%3s: %10lu %10lu\n",
+			"pkt", stats->rx_packets, stats->tx_packets);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+	kfree(buf);
+
+	return ret;
+}
+
+static const struct file_operations ag71xx_fops_napi_stats = {
+	.open	= ag71xx_debugfs_generic_open,
+	.read	= read_file_napi_stats,
+	.owner	= THIS_MODULE
+};
+
+#define DESC_PRINT_LEN	64
+
+static ssize_t read_file_ring(struct file *file, char __user *user_buf,
+			      size_t count, loff_t *ppos,
+			      struct ag71xx *ag,
+			      struct ag71xx_ring *ring,
+			      unsigned desc_reg)
+{
+	int ring_size = BIT(ring->order);
+	int ring_mask = ring_size - 1;
+	char *buf;
+	unsigned int buflen;
+	unsigned int len = 0;
+	unsigned long flags;
+	ssize_t ret;
+	int curr;
+	int dirty;
+	u32 desc_hw;
+	int i;
+
+	buflen = (ring_size * DESC_PRINT_LEN);
+	buf = kmalloc(buflen, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	len += snprintf(buf + len, buflen - len,
+			"Idx ... %-8s %-8s %-8s %-8s .\n",
+			"desc", "next", "data", "ctrl");
+
+	spin_lock_irqsave(&ag->lock, flags);
+
+	curr = (ring->curr & ring_mask);
+	dirty = (ring->dirty & ring_mask);
+	desc_hw = ag71xx_rr(ag, desc_reg);
+	for (i = 0; i < ring_size; i++) {
+		struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i);
+		u32 desc_dma = ((u32) ring->descs_dma) + i * AG71XX_DESC_SIZE;
+
+		len += snprintf(buf + len, buflen - len,
+			"%3d %c%c%c %08x %08x %08x %08x %c\n",
+			i,
+			(i == curr) ? 'C' : ' ',
+			(i == dirty) ? 'D' : ' ',
+			(desc_hw == desc_dma) ? 'H' : ' ',
+			desc_dma,
+			desc->next,
+			desc->data,
+			desc->ctrl,
+			(desc->ctrl & DESC_EMPTY) ? 'E' : '*');
+	}
+
+	spin_unlock_irqrestore(&ag->lock, flags);
+
+	ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+	kfree(buf);
+
+	return ret;
+}
+
+static ssize_t read_file_tx_ring(struct file *file, char __user *user_buf,
+				 size_t count, loff_t *ppos)
+{
+	struct ag71xx *ag = file->private_data;
+
+	return read_file_ring(file, user_buf, count, ppos, ag, &ag->tx_ring,
+			      AG71XX_REG_TX_DESC);
+}
+
+static const struct file_operations ag71xx_fops_tx_ring = {
+	.open	= ag71xx_debugfs_generic_open,
+	.read	= read_file_tx_ring,
+	.owner	= THIS_MODULE
+};
+
+static ssize_t read_file_rx_ring(struct file *file, char __user *user_buf,
+				 size_t count, loff_t *ppos)
+{
+	struct ag71xx *ag = file->private_data;
+
+	return read_file_ring(file, user_buf, count, ppos, ag, &ag->rx_ring,
+			      AG71XX_REG_RX_DESC);
+}
+
+static const struct file_operations ag71xx_fops_rx_ring = {
+	.open	= ag71xx_debugfs_generic_open,
+	.read	= read_file_rx_ring,
+	.owner	= THIS_MODULE
+};
+
+void ag71xx_debugfs_exit(struct ag71xx *ag)
+{
+	debugfs_remove_recursive(ag->debug.debugfs_dir);
+}
+
+int ag71xx_debugfs_init(struct ag71xx *ag)
+{
+	struct device *dev = &ag->pdev->dev;
+
+	ag->debug.debugfs_dir = debugfs_create_dir(dev_name(dev),
+						   ag71xx_debugfs_root);
+	if (!ag->debug.debugfs_dir) {
+		dev_err(dev, "unable to create debugfs directory\n");
+		return -ENOENT;
+	}
+
+	debugfs_create_file("int_stats", S_IRUGO, ag->debug.debugfs_dir,
+			    ag, &ag71xx_fops_int_stats);
+	debugfs_create_file("napi_stats", S_IRUGO, ag->debug.debugfs_dir,
+			    ag, &ag71xx_fops_napi_stats);
+	debugfs_create_file("tx_ring", S_IRUGO, ag->debug.debugfs_dir,
+			    ag, &ag71xx_fops_tx_ring);
+	debugfs_create_file("rx_ring", S_IRUGO, ag->debug.debugfs_dir,
+			    ag, &ag71xx_fops_rx_ring);
+
+	return 0;
+}
+
+int ag71xx_debugfs_root_init(void)
+{
+	if (ag71xx_debugfs_root)
+		return -EBUSY;
+
+	ag71xx_debugfs_root = debugfs_create_dir(KBUILD_MODNAME, NULL);
+	if (!ag71xx_debugfs_root)
+		return -ENOENT;
+
+	return 0;
+}
+
+void ag71xx_debugfs_root_exit(void)
+{
+	debugfs_remove(ag71xx_debugfs_root);
+	ag71xx_debugfs_root = NULL;
+}

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_ethtool.c

@@ -0,0 +1,131 @@
+/*
+ *  Atheros AR71xx built-in ethernet mac driver
+ *
+ *  Copyright (C) 2008-2010 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.
+ */
+
+#include "ag71xx.h"
+
+static int ag71xx_ethtool_get_settings(struct net_device *dev,
+				       struct ethtool_cmd *cmd)
+{
+	struct ag71xx *ag = netdev_priv(dev);
+	struct phy_device *phydev = ag->phy_dev;
+
+	if (!phydev)
+		return -ENODEV;
+
+	return phy_ethtool_gset(phydev, cmd);
+}
+
+static int ag71xx_ethtool_set_settings(struct net_device *dev,
+				       struct ethtool_cmd *cmd)
+{
+	struct ag71xx *ag = netdev_priv(dev);
+	struct phy_device *phydev = ag->phy_dev;
+
+	if (!phydev)
+		return -ENODEV;
+
+	return phy_ethtool_sset(phydev, cmd);
+}
+
+static void ag71xx_ethtool_get_drvinfo(struct net_device *dev,
+				       struct ethtool_drvinfo *info)
+{
+	struct ag71xx *ag = netdev_priv(dev);
+
+	strcpy(info->driver, ag->pdev->dev.driver->name);
+	strcpy(info->version, AG71XX_DRV_VERSION);
+	strcpy(info->bus_info, dev_name(&ag->pdev->dev));
+}
+
+static u32 ag71xx_ethtool_get_msglevel(struct net_device *dev)
+{
+	struct ag71xx *ag = netdev_priv(dev);
+
+	return ag->msg_enable;
+}
+
+static void ag71xx_ethtool_set_msglevel(struct net_device *dev, u32 msg_level)
+{
+	struct ag71xx *ag = netdev_priv(dev);
+
+	ag->msg_enable = msg_level;
+}
+
+static void ag71xx_ethtool_get_ringparam(struct net_device *dev,
+					 struct ethtool_ringparam *er)
+{
+	struct ag71xx *ag = netdev_priv(dev);
+
+	er->tx_max_pending = AG71XX_TX_RING_SIZE_MAX;
+	er->rx_max_pending = AG71XX_RX_RING_SIZE_MAX;
+	er->rx_mini_max_pending = 0;
+	er->rx_jumbo_max_pending = 0;
+
+	er->tx_pending = BIT(ag->tx_ring.order);
+	er->rx_pending = BIT(ag->rx_ring.order);
+	er->rx_mini_pending = 0;
+	er->rx_jumbo_pending = 0;
+
+	if (ag->tx_ring.desc_split)
+		er->tx_pending /= AG71XX_TX_RING_DS_PER_PKT;
+}
+
+static int ag71xx_ethtool_set_ringparam(struct net_device *dev,
+					struct ethtool_ringparam *er)
+{
+	struct ag71xx *ag = netdev_priv(dev);
+	unsigned tx_size;
+	unsigned rx_size;
+	int err = 0;
+
+	if (er->rx_mini_pending != 0||
+	    er->rx_jumbo_pending != 0 ||
+	    er->rx_pending == 0 ||
+	    er->tx_pending == 0)
+		return -EINVAL;
+
+	tx_size = er->tx_pending < AG71XX_TX_RING_SIZE_MAX ?
+		  er->tx_pending : AG71XX_TX_RING_SIZE_MAX;
+
+	rx_size = er->rx_pending < AG71XX_RX_RING_SIZE_MAX ?
+		  er->rx_pending : AG71XX_RX_RING_SIZE_MAX;
+
+	if (netif_running(dev)) {
+		err = dev->netdev_ops->ndo_stop(dev);
+		if (err)
+			return err;
+	}
+
+	if (ag->tx_ring.desc_split)
+		tx_size *= AG71XX_TX_RING_DS_PER_PKT;
+
+	ag->tx_ring.order = ag71xx_ring_size_order(tx_size);
+	ag->rx_ring.order = ag71xx_ring_size_order(rx_size);
+
+	if (netif_running(dev))
+		err = dev->netdev_ops->ndo_open(dev);
+
+	return err;
+}
+
+struct ethtool_ops ag71xx_ethtool_ops = {
+	.set_settings	= ag71xx_ethtool_set_settings,
+	.get_settings	= ag71xx_ethtool_get_settings,
+	.get_drvinfo	= ag71xx_ethtool_get_drvinfo,
+	.get_msglevel	= ag71xx_ethtool_get_msglevel,
+	.set_msglevel	= ag71xx_ethtool_set_msglevel,
+	.get_ringparam	= ag71xx_ethtool_get_ringparam,
+	.set_ringparam	= ag71xx_ethtool_set_ringparam,
+	.get_link	= ethtool_op_get_link,
+	.get_ts_info	= ethtool_op_get_ts_info,
+};

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c

@@ -0,0 +1,320 @@
+/*
+ *  Atheros AR71xx built-in ethernet mac driver
+ *
+ *  Copyright (C) 2008-2010 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.
+ */
+
+#include "ag71xx.h"
+
+#define AG71XX_MDIO_RETRY	1000
+#define AG71XX_MDIO_DELAY	5
+
+static inline void ag71xx_mdio_wr(struct ag71xx_mdio *am, unsigned reg,
+				  u32 value)
+{
+	void __iomem *r;
+
+	r = am->mdio_base + reg;
+	__raw_writel(value, r);
+
+	/* flush write */
+	(void) __raw_readl(r);
+}
+
+static inline u32 ag71xx_mdio_rr(struct ag71xx_mdio *am, unsigned reg)
+{
+	return __raw_readl(am->mdio_base + reg);
+}
+
+static void ag71xx_mdio_dump_regs(struct ag71xx_mdio *am)
+{
+	DBG("%s: mii_cfg=%08x, mii_cmd=%08x, mii_addr=%08x\n",
+		am->mii_bus->name,
+		ag71xx_mdio_rr(am, AG71XX_REG_MII_CFG),
+		ag71xx_mdio_rr(am, AG71XX_REG_MII_CMD),
+		ag71xx_mdio_rr(am, AG71XX_REG_MII_ADDR));
+	DBG("%s: mii_ctrl=%08x, mii_status=%08x, mii_ind=%08x\n",
+		am->mii_bus->name,
+		ag71xx_mdio_rr(am, AG71XX_REG_MII_CTRL),
+		ag71xx_mdio_rr(am, AG71XX_REG_MII_STATUS),
+		ag71xx_mdio_rr(am, AG71XX_REG_MII_IND));
+}
+
+static int ag71xx_mdio_wait_busy(struct ag71xx_mdio *am)
+{
+	int i;
+
+	for (i = 0; i < AG71XX_MDIO_RETRY; i++) {
+		u32 busy;
+
+		udelay(AG71XX_MDIO_DELAY);
+
+		busy = ag71xx_mdio_rr(am, AG71XX_REG_MII_IND);
+		if (!busy)
+			return 0;
+
+		udelay(AG71XX_MDIO_DELAY);
+	}
+
+	pr_err("%s: MDIO operation timed out\n", am->mii_bus->name);
+
+	return -ETIMEDOUT;
+}
+
+int ag71xx_mdio_mii_read(struct ag71xx_mdio *am, int addr, int reg)
+{
+	int err;
+	int ret;
+
+	err = ag71xx_mdio_wait_busy(am);
+	if (err)
+		return 0xffff;
+
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_ADDR,
+			((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_CMD, MII_CMD_READ);
+
+	err = ag71xx_mdio_wait_busy(am);
+	if (err)
+		return 0xffff;
+
+	ret = ag71xx_mdio_rr(am, AG71XX_REG_MII_STATUS) & 0xffff;
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_CMD, MII_CMD_WRITE);
+
+	DBG("mii_read: addr=%04x, reg=%04x, value=%04x\n", addr, reg, ret);
+
+	return ret;
+}
+
+void ag71xx_mdio_mii_write(struct ag71xx_mdio *am, int addr, int reg, u16 val)
+{
+	DBG("mii_write: addr=%04x, reg=%04x, value=%04x\n", addr, reg, val);
+
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_ADDR,
+			((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff));
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_CTRL, val);
+
+	ag71xx_mdio_wait_busy(am);
+}
+
+static const u32 ar71xx_mdio_div_table[] = {
+	4, 4, 6, 8, 10, 14, 20, 28,
+};
+
+static const u32 ar7240_mdio_div_table[] = {
+	2, 2, 4, 6, 8, 12, 18, 26, 32, 40, 48, 56, 62, 70, 78, 96,
+};
+
+static const u32 ar933x_mdio_div_table[] = {
+	4, 4, 6, 8, 10, 14, 20, 28, 34, 42, 50, 58, 66, 74, 82, 98,
+};
+
+static int ag71xx_mdio_get_divider(struct ag71xx_mdio *am, u32 *div)
+{
+	unsigned long ref_clock, mdio_clock;
+	const u32 *table;
+	int ndivs;
+	int i;
+
+	ref_clock = am->pdata->ref_clock;
+	mdio_clock = am->pdata->mdio_clock;
+
+	if (!ref_clock || !mdio_clock)
+		return -EINVAL;
+
+	if (am->pdata->is_ar9330 || am->pdata->is_ar934x) {
+		table = ar933x_mdio_div_table;
+		ndivs = ARRAY_SIZE(ar933x_mdio_div_table);
+	} else if (am->pdata->is_ar7240) {
+		table = ar7240_mdio_div_table;
+		ndivs = ARRAY_SIZE(ar7240_mdio_div_table);
+	} else {
+		table = ar71xx_mdio_div_table;
+		ndivs = ARRAY_SIZE(ar71xx_mdio_div_table);
+	}
+
+	for (i = 0; i < ndivs; i++) {
+		unsigned long t;
+
+		t = ref_clock / table[i];
+		if (t <= mdio_clock) {
+			*div = i;
+			return 0;
+		}
+	}
+
+	dev_err(&am->mii_bus->dev, "no divider found for %lu/%lu\n",
+		ref_clock, mdio_clock);
+	return -ENOENT;
+}
+
+static int ag71xx_mdio_reset(struct mii_bus *bus)
+{
+	struct ag71xx_mdio *am = bus->priv;
+	u32 t;
+	int err;
+
+	err = ag71xx_mdio_get_divider(am, &t);
+	if (err) {
+		/* fallback */
+		if (am->pdata->is_ar7240)
+			t = MII_CFG_CLK_DIV_6;
+		else if (am->pdata->builtin_switch && !am->pdata->is_ar934x)
+			t = MII_CFG_CLK_DIV_10;
+		else if (!am->pdata->builtin_switch && am->pdata->is_ar934x)
+			t = MII_CFG_CLK_DIV_58;
+		else
+			t = MII_CFG_CLK_DIV_28;
+	}
+
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_CFG, t | MII_CFG_RESET);
+	udelay(100);
+
+	ag71xx_mdio_wr(am, AG71XX_REG_MII_CFG, t);
+	udelay(100);
+
+	if (am->pdata->reset)
+		am->pdata->reset(bus);
+
+	return 0;
+}
+
+static int ag71xx_mdio_read(struct mii_bus *bus, int addr, int reg)
+{
+	struct ag71xx_mdio *am = bus->priv;
+
+	if (am->pdata->builtin_switch)
+		return ar7240sw_phy_read(bus, addr, reg);
+	else
+		return ag71xx_mdio_mii_read(am, addr, reg);
+}
+
+static int ag71xx_mdio_write(struct mii_bus *bus, int addr, int reg, u16 val)
+{
+	struct ag71xx_mdio *am = bus->priv;
+
+	if (am->pdata->builtin_switch)
+		ar7240sw_phy_write(bus, addr, reg, val);
+	else
+		ag71xx_mdio_mii_write(am, addr, reg, val);
+	return 0;
+}
+
+static int ag71xx_mdio_probe(struct platform_device *pdev)
+{
+	struct ag71xx_mdio_platform_data *pdata;
+	struct ag71xx_mdio *am;
+	struct resource *res;
+	int i;
+	int err;
+
+	pdata = pdev->dev.platform_data;
+	if (!pdata) {
+		dev_err(&pdev->dev, "no platform data specified\n");
+		return -EINVAL;
+	}
+
+	am = kzalloc(sizeof(*am), GFP_KERNEL);
+	if (!am) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	am->pdata = pdata;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "no iomem resource found\n");
+		err = -ENXIO;
+		goto err_free_mdio;
+	}
+
+	am->mdio_base = ioremap_nocache(res->start, res->end - res->start + 1);
+	if (!am->mdio_base) {
+		dev_err(&pdev->dev, "unable to ioremap registers\n");
+		err = -ENOMEM;
+		goto err_free_mdio;
+	}
+
+	am->mii_bus = mdiobus_alloc();
+	if (am->mii_bus == NULL) {
+		err = -ENOMEM;
+		goto err_iounmap;
+	}
+
+	am->mii_bus->name = "ag71xx_mdio";
+	am->mii_bus->read = ag71xx_mdio_read;
+	am->mii_bus->write = ag71xx_mdio_write;
+	am->mii_bus->reset = ag71xx_mdio_reset;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
+	am->mii_bus->irq = am->mii_irq;
+#endif
+	am->mii_bus->priv = am;
+	am->mii_bus->parent = &pdev->dev;
+	snprintf(am->mii_bus->id, MII_BUS_ID_SIZE, "%s", dev_name(&pdev->dev));
+	am->mii_bus->phy_mask = pdata->phy_mask;
+
+	for (i = 0; i < PHY_MAX_ADDR; i++)
+		am->mii_bus->irq[i] = PHY_POLL;
+
+	ag71xx_mdio_wr(am, AG71XX_REG_MAC_CFG1, 0);
+
+	err = mdiobus_register(am->mii_bus);
+	if (err)
+		goto err_free_bus;
+
+	ag71xx_mdio_dump_regs(am);
+
+	platform_set_drvdata(pdev, am);
+	return 0;
+
+err_free_bus:
+	mdiobus_free(am->mii_bus);
+err_iounmap:
+	iounmap(am->mdio_base);
+err_free_mdio:
+	kfree(am);
+err_out:
+	return err;
+}
+
+static int ag71xx_mdio_remove(struct platform_device *pdev)
+{
+	struct ag71xx_mdio *am = platform_get_drvdata(pdev);
+
+	if (am) {
+		mdiobus_unregister(am->mii_bus);
+		mdiobus_free(am->mii_bus);
+		iounmap(am->mdio_base);
+		kfree(am);
+		platform_set_drvdata(pdev, NULL);
+	}
+
+	return 0;
+}
+
+static struct platform_driver ag71xx_mdio_driver = {
+	.probe		= ag71xx_mdio_probe,
+	.remove		= ag71xx_mdio_remove,
+	.driver = {
+		.name	= "ag71xx-mdio",
+	}
+};
+
+int __init ag71xx_mdio_driver_init(void)
+{
+	return platform_driver_register(&ag71xx_mdio_driver);
+}
+
+void ag71xx_mdio_driver_exit(void)
+{
+	platform_driver_unregister(&ag71xx_mdio_driver);
+}

target/linux/ar71xx/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c

@@ -0,0 +1,261 @@
+/*
+ *  Atheros AR71xx built-in ethernet mac driver
+ *
+ *  Copyright (C) 2008-2010 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.
+ */
+
+#include "ag71xx.h"
+
+static void ag71xx_phy_link_adjust(struct net_device *dev)
+{
+	struct ag71xx *ag = netdev_priv(dev);
+	struct phy_device *phydev = ag->phy_dev;
+	unsigned long flags;
+	int status_change = 0;
+
+	spin_lock_irqsave(&ag->lock, flags);
+
+	if (phydev->link) {
+		if (ag->duplex != phydev->duplex
+		    || ag->speed != phydev->speed) {
+			status_change = 1;
+		}
+	}
+
+	if (phydev->link != ag->link)
+		status_change = 1;
+
+	ag->link = phydev->link;
+	ag->duplex = phydev->duplex;
+	ag->speed = phydev->speed;
+
+	if (status_change)
+		ag71xx_link_adjust(ag);
+
+	spin_unlock_irqrestore(&ag->lock, flags);
+}
+
+void ag71xx_phy_start(struct ag71xx *ag)
+{
+	struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+
+	if (ag->phy_dev) {
+		phy_start(ag->phy_dev);
+	} else if (pdata->mii_bus_dev && pdata->switch_data) {
+		ag71xx_ar7240_start(ag);
+	} else {
+		ag->link = 1;
+		ag71xx_link_adjust(ag);
+	}
+}
+
+void ag71xx_phy_stop(struct ag71xx *ag)
+{
+	struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+	unsigned long flags;
+
+	if (ag->phy_dev)
+		phy_stop(ag->phy_dev);
+	else if (pdata->mii_bus_dev && pdata->switch_data)
+		ag71xx_ar7240_stop(ag);
+
+	spin_lock_irqsave(&ag->lock, flags);
+	if (ag->link) {
+		ag->link = 0;
+		ag71xx_link_adjust(ag);
+	}
+	spin_unlock_irqrestore(&ag->lock, flags);
+}
+
+static int ag71xx_phy_connect_fixed(struct ag71xx *ag)
+{
+	struct device *dev = &ag->pdev->dev;
+	struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+	int ret = 0;
+
+	/* use fixed settings */
+	switch (pdata->speed) {
+	case SPEED_10:
+	case SPEED_100:
+	case SPEED_1000:
+		break;
+	default:
+		dev_err(dev, "invalid speed specified\n");
+		ret = -EINVAL;
+		break;
+	}
+
+	dev_dbg(dev, "using fixed link parameters\n");
+
+	ag->duplex = pdata->duplex;
+	ag->speed = pdata->speed;
+
+	return ret;
+}
+
+static int ag71xx_phy_connect_multi(struct ag71xx *ag)
+{
+	struct device *dev = &ag->pdev->dev;
+	struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+	struct phy_device *phydev = NULL;
+	int phy_addr;
+	int ret = 0;
+
+	for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
+		if (!(pdata->phy_mask & (1 << phy_addr)))
+			continue;
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
+		if (ag->mii_bus->phy_map[phy_addr] == NULL)
+			continue;
+
+		DBG("%s: PHY found at %s, uid=%08x\n",
+			dev_name(dev),
+			dev_name(&ag->mii_bus->phy_map[phy_addr]->dev),
+			ag->mii_bus->phy_map[phy_addr]->phy_id);
+
+		if (phydev == NULL)
+			phydev = ag->mii_bus->phy_map[phy_addr];
+#else
+		if (ag->mii_bus->mdio_map[phy_addr] == NULL)
+			continue;
+
+		DBG("%s: PHY found at %s, uid=%08x\n",
+			dev_name(dev),
+			dev_name(&ag->mii_bus->mdio_map[phy_addr]->dev),
+			ag->mii_bus->mdio_map[phy_addr]->phy_id);
+
+		if (phydev == NULL)
+			phydev = mdiobus_get_phy(ag->mii_bus, phy_addr);
+#endif
+	}
+
+	if (!phydev) {
+		dev_err(dev, "no PHY found with phy_mask=%08x\n",
+			   pdata->phy_mask);
+		return -ENODEV;
+	}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
+	ag->phy_dev = phy_connect(ag->dev, dev_name(&phydev->dev),
+#else
+	ag->phy_dev = phy_connect(ag->dev, phydev_name(phydev),
+#endif
+				  &ag71xx_phy_link_adjust,
+				  pdata->phy_if_mode);
+
+	if (IS_ERR(ag->phy_dev)) {
+		dev_err(dev, "could not connect to PHY at %s\n",
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
+			   dev_name(&phydev->dev));
+#else
+			   phydev_name(phydev));
+#endif
+		return PTR_ERR(ag->phy_dev);
+	}
+
+	/* mask with MAC supported features */
+	if (pdata->has_gbit)
+		phydev->supported &= PHY_GBIT_FEATURES;
+	else
+		phydev->supported &= PHY_BASIC_FEATURES;
+
+	phydev->advertising = phydev->supported;
+
+	dev_info(dev, "connected to PHY at %s [uid=%08x, driver=%s]\n",
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,5,0)
+		    dev_name(&phydev->dev),
+#else
+		    phydev_name(phydev),
+#endif
+		    phydev->phy_id, phydev->drv->name);
+
+	ag->link = 0;
+	ag->speed = 0;
+	ag->duplex = -1;
+
+	return ret;
+}
+
+static int dev_is_class(struct device *dev, void *class)
+{
+	if (dev->class != NULL && !strcmp(dev->class->name, class))
+		return 1;
+
+	return 0;
+}
+
+static struct device *dev_find_class(struct device *parent, char *class)
+{
+	if (dev_is_class(parent, class)) {
+		get_device(parent);
+		return parent;
+	}
+
+	return device_find_child(parent, class, dev_is_class);
+}
+
+static struct mii_bus *dev_to_mii_bus(struct device *dev)
+{
+	struct device *d;
+
+	d = dev_find_class(dev, "mdio_bus");
+	if (d != NULL) {
+		struct mii_bus *bus;
+
+		bus = to_mii_bus(d);
+		put_device(d);
+
+		return bus;
+	}
+
+	return NULL;
+}
+
+int ag71xx_phy_connect(struct ag71xx *ag)
+{
+	struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+
+	if (pdata->mii_bus_dev == NULL ||
+	    pdata->mii_bus_dev->bus == NULL )
+		return ag71xx_phy_connect_fixed(ag);
+
+	ag->mii_bus = dev_to_mii_bus(pdata->mii_bus_dev);
+	if (ag->mii_bus == NULL) {
+		dev_err(&ag->pdev->dev, "unable to find MII bus on device '%s'\n",
+			   dev_name(pdata->mii_bus_dev));
+		return -ENODEV;
+	}
+
+	/* Reset the mdio bus explicitly */
+	if (ag->mii_bus->reset) {
+		mutex_lock(&ag->mii_bus->mdio_lock);
+		ag->mii_bus->reset(ag->mii_bus);
+		mutex_unlock(&ag->mii_bus->mdio_lock);
+	}
+
+	if (pdata->switch_data)
+		return ag71xx_ar7240_init(ag);
+
+	if (pdata->phy_mask)
+		return ag71xx_phy_connect_multi(ag);
+
+	return ag71xx_phy_connect_fixed(ag);
+}
+
+void ag71xx_phy_disconnect(struct ag71xx *ag)
+{
+	struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+
+	if (pdata->switch_data)
+		ag71xx_ar7240_cleanup(ag);
+	else if (ag->phy_dev)
+		phy_disconnect(ag->phy_dev);
+}