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author | David Bauer <mail@david-bauer.net> | 2020-03-13 01:07:39 +0100 |
---|---|---|
committer | David Bauer <mail@david-bauer.net> | 2020-03-13 20:43:57 +0100 |
commit | 32726846c85985fbc320d123a7b26b32124cd47a (patch) | |
tree | 6c374c2f4825162ca58c65b2b1beba013ab2412b /target/linux/ath79/files/drivers/net/ethernet | |
parent | 0933d1363b262017a815a538a0017f301f34883b (diff) | |
download | upstream-32726846c85985fbc320d123a7b26b32124cd47a.tar.gz upstream-32726846c85985fbc320d123a7b26b32124cd47a.tar.bz2 upstream-32726846c85985fbc320d123a7b26b32124cd47a.zip |
ath79: use downstream ag71xx for Kernel 5.4
The ag71xx driver from Linux 5.4 currently has various shortcomings
when used with OpenWrt compared to our downstream version.
For example, the upstream driver does not support modifying the ethernet
clock and configuring RGMII delays on the MAC side.
While we should certainly switch to the upstream driver, the amount of
necessary patches would make it cumbersome to work with. It's also
highly likely we won't be able to finish patching the upstream driver in
time for a Linux 5.4 release.
Tested on Siemens WS-AP3610.
CC: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David Bauer <mail@david-bauer.net>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Diffstat (limited to 'target/linux/ath79/files/drivers/net/ethernet')
9 files changed, 3106 insertions, 0 deletions
diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/Kconfig b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/Kconfig new file mode 100644 index 0000000000..4df2d21e34 --- /dev/null +++ b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/Kconfig @@ -0,0 +1,25 @@ +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. + +endif diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/Makefile b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/Makefile new file mode 100644 index 0000000000..87add0d208 --- /dev/null +++ b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/Makefile @@ -0,0 +1,13 @@ +# +# Makefile for the Atheros AR71xx built-in ethernet macs +# + +ag71xx-y += ag71xx_main.o +ag71xx-y += ag71xx_gmac.o +ag71xx-y += ag71xx_ethtool.o +ag71xx-y += ag71xx_phy.o + +ag71xx-$(CONFIG_AG71XX_DEBUG_FS) += ag71xx_debugfs.o + +obj-$(CONFIG_AG71XX) += ag71xx_mdio.o +obj-$(CONFIG_AG71XX) += ag71xx.o diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h new file mode 100644 index 0000000000..fde9db3745 --- /dev/null +++ b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx.h @@ -0,0 +1,454 @@ +/* + * 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/reset.h> +#include <linux/of.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#include <linux/bitops.h> + +#include <asm/mach-ath79/ar71xx_regs.h> +#include <asm/mach-ath79/ath79.h> + +#define AG71XX_DRV_NAME "ag71xx" + +/* + * 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 + +#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_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; + + int mac_idx; + + u16 desc_pktlen_mask; + u16 rx_buf_size; + u8 rx_buf_offset; + u8 tx_hang_workaround:1; + + 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; + void __iomem *mii_base; + + struct ag71xx_desc *stop_desc; + dma_addr_t stop_desc_dma; + + struct phy_device *phy_dev; + void *phy_priv; + int phy_if_mode; + + unsigned int link; + unsigned int speed; + int duplex; + + struct delayed_work restart_work; + struct timer_list oom_timer; + + struct reset_control *mac_reset; + struct reset_control *mdio_reset; + + u32 fifodata[3]; + u32 plldata[3]; + u32 pllreg[3]; + struct regmap *pllregmap; + +#ifdef CONFIG_AG71XX_DEBUG_FS + struct ag71xx_debug debug; +#endif +}; + +struct ag71xx_mdio { + struct reset_control *mdio_reset; + struct mii_bus *mii_bus; + struct regmap *mii_regmap; +}; + +extern struct ethtool_ops ag71xx_ethtool_ops; +void ag71xx_link_adjust(struct ag71xx *ag); + +int ag71xx_phy_connect(struct ag71xx *ag); +void ag71xx_phy_disconnect(struct ag71xx *ag); + +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_wr(struct ag71xx *ag, unsigned reg, u32 value) +{ + __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) +{ + return __raw_readl(ag->mac_base + reg); +} + +static inline void ag71xx_sb(struct ag71xx *ag, unsigned reg, u32 mask) +{ + void __iomem *r; + + 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; + + 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_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 */ + +int ag71xx_ar7240_init(struct ag71xx *ag, struct device_node *np); +void ag71xx_ar7240_cleanup(struct ag71xx *ag); + +int ag71xx_setup_gmac(struct device_node *np); + +int ar7240sw_phy_read(struct mii_bus *mii, int addr, int reg); +int ar7240sw_phy_write(struct mii_bus *mii, int addr, int reg, u16 val); + +#endif /* _AG71XX_H */ diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_debugfs.c b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_debugfs.c new file mode 100644 index 0000000000..20cf1c15c8 --- /dev/null +++ b/target/linux/ath79/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; +} diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_ethtool.c b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_ethtool.c new file mode 100644 index 0000000000..2cd7b1be83 --- /dev/null +++ b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_ethtool.c @@ -0,0 +1,108 @@ +/* + * 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 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; +} + +static int ag71xx_ethtool_nway_reset(struct net_device *dev) +{ + struct ag71xx *ag = netdev_priv(dev); + struct phy_device *phydev = ag->phy_dev; + + if (!phydev) + return -ENODEV; + + return genphy_restart_aneg(phydev); +} + +struct ethtool_ops ag71xx_ethtool_ops = { + .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_ksettings = phy_ethtool_get_link_ksettings, + .set_link_ksettings = phy_ethtool_set_link_ksettings, + .get_link = ethtool_op_get_link, + .get_ts_info = ethtool_op_get_ts_info, + .nway_reset = ag71xx_ethtool_nway_reset, +}; diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c new file mode 100644 index 0000000000..cc0a15d3a4 --- /dev/null +++ b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c @@ -0,0 +1,135 @@ +/* + * Atheros AR71xx built-in ethernet mac 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/sizes.h> +#include <linux/of_address.h> +#include "ag71xx.h" + +static void ag71xx_of_set(struct device_node *np, const char *prop, + u32 *reg, u32 shift, u32 mask) +{ + u32 val; + + if (of_property_read_u32(np, prop, &val)) + return; + + *reg &= ~(mask << shift); + *reg |= ((val & mask) << shift); +} + +static void ag71xx_of_bit(struct device_node *np, const char *prop, + u32 *reg, u32 mask) +{ + u32 val; + + if (of_property_read_u32(np, prop, &val)) + return; + + if (val) + *reg |= mask; + else + *reg &= ~mask; +} + +static void ag71xx_setup_gmac_933x(struct device_node *np, void __iomem *base) +{ + u32 val = __raw_readl(base + AR933X_GMAC_REG_ETH_CFG); + + ag71xx_of_bit(np, "switch-phy-swap", &val, AR933X_ETH_CFG_SW_PHY_SWAP); + ag71xx_of_bit(np, "switch-phy-addr-swap", &val, + AR933X_ETH_CFG_SW_PHY_ADDR_SWAP); + + __raw_writel(val, base + AR933X_GMAC_REG_ETH_CFG); +} + +static void ag71xx_setup_gmac_934x(struct device_node *np, void __iomem *base) +{ + u32 val = __raw_readl(base + AR934X_GMAC_REG_ETH_CFG); + + ag71xx_of_bit(np, "rgmii-gmac0", &val, AR934X_ETH_CFG_RGMII_GMAC0); + ag71xx_of_bit(np, "mii-gmac0", &val, AR934X_ETH_CFG_MII_GMAC0); + ag71xx_of_bit(np, "mii-gmac0-slave", &val, AR934X_ETH_CFG_MII_GMAC0_SLAVE); + ag71xx_of_bit(np, "gmii-gmac0", &val, AR934X_ETH_CFG_GMII_GMAC0); + ag71xx_of_bit(np, "switch-phy-swap", &val, AR934X_ETH_CFG_SW_PHY_SWAP); + ag71xx_of_bit(np, "switch-only-mode", &val, + AR934X_ETH_CFG_SW_ONLY_MODE); + ag71xx_of_set(np, "rxdv-delay", &val, + AR934X_ETH_CFG_RDV_DELAY_SHIFT, 0x3); + ag71xx_of_set(np, "rxd-delay", &val, + AR934X_ETH_CFG_RXD_DELAY_SHIFT, 0x3); + ag71xx_of_set(np, "txd-delay", &val, + AR934X_ETH_CFG_TXD_DELAY_SHIFT, 0x3); + ag71xx_of_set(np, "txen-delay", &val, + AR934X_ETH_CFG_TXE_DELAY_SHIFT, 0x3); + + __raw_writel(val, base + AR934X_GMAC_REG_ETH_CFG); +} + +static void ag71xx_setup_gmac_955x(struct device_node *np, void __iomem *base) +{ + u32 val = __raw_readl(base + QCA955X_GMAC_REG_ETH_CFG); + + ag71xx_of_bit(np, "rgmii-enabled", &val, QCA955X_ETH_CFG_RGMII_EN); + ag71xx_of_bit(np, "ge0-sgmii", &val, QCA955X_ETH_CFG_GE0_SGMII); + ag71xx_of_set(np, "txen-delay", &val, QCA955X_ETH_CFG_TXE_DELAY_SHIFT, 0x3); + ag71xx_of_set(np, "txd-delay", &val, QCA955X_ETH_CFG_TXD_DELAY_SHIFT, 0x3); + ag71xx_of_set(np, "rxdv-delay", &val, QCA955X_ETH_CFG_RDV_DELAY_SHIFT, 0x3); + ag71xx_of_set(np, "rxd-delay", &val, QCA955X_ETH_CFG_RXD_DELAY_SHIFT, 0x3); + + __raw_writel(val, base + QCA955X_GMAC_REG_ETH_CFG); +} + +static void ag71xx_setup_gmac_956x(struct device_node *np, void __iomem *base) +{ + u32 val = __raw_readl(base + QCA956X_GMAC_REG_ETH_CFG); + + ag71xx_of_bit(np, "switch-phy-swap", &val, QCA956X_ETH_CFG_SW_PHY_SWAP); + ag71xx_of_bit(np, "switch-phy-addr-swap", &val, + QCA956X_ETH_CFG_SW_PHY_ADDR_SWAP); + + __raw_writel(val, base + QCA956X_GMAC_REG_ETH_CFG); +} + +int ag71xx_setup_gmac(struct device_node *np) +{ + struct device_node *np_dev; + void __iomem *base; + int err = 0; + + np = of_get_child_by_name(np, "gmac-config"); + if (!np) + return 0; + + np_dev = of_parse_phandle(np, "device", 0); + if (!np_dev) + goto out; + + base = of_iomap(np_dev, 0); + if (!base) { + pr_err("%pOF: can't map GMAC registers\n", np_dev); + err = -ENOMEM; + goto err_iomap; + } + + if (of_device_is_compatible(np_dev, "qca,ar9330-gmac")) + ag71xx_setup_gmac_933x(np, base); + else if (of_device_is_compatible(np_dev, "qca,ar9340-gmac")) + ag71xx_setup_gmac_934x(np, base); + else if (of_device_is_compatible(np_dev, "qca,qca9550-gmac")) + ag71xx_setup_gmac_955x(np, base); + else if (of_device_is_compatible(np_dev, "qca,qca9560-gmac")) + ag71xx_setup_gmac_956x(np, base); + + iounmap(base); + +err_iomap: + of_node_put(np_dev); +out: + of_node_put(np); + return err; +} diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c new file mode 100644 index 0000000000..edb026544c --- /dev/null +++ b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c @@ -0,0 +1,1740 @@ +/* + * 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/sizes.h> +#include <linux/of_net.h> +#include <linux/of_address.h> +#include <linux/of_platform.h> +#include "ag71xx.h" + +#define AG71XX_DEFAULT_MSG_ENABLE \ + (NETIF_MSG_DRV \ + | NETIF_MSG_PROBE \ + | NETIF_MSG_LINK \ + | NETIF_MSG_TIMER \ + | NETIF_MSG_IFDOWN \ + | NETIF_MSG_IFUP \ + | NETIF_MSG_RX_ERR \ + | NETIF_MSG_TX_ERR) + +static int ag71xx_msg_level = -1; + +module_param_named(msg_level, ag71xx_msg_level, int, 0); +MODULE_PARM_DESC(msg_level, "Message level (-1=defaults,0=none,...,16=all)"); + +#define ETH_SWITCH_HEADER_LEN 2 + +static int ag71xx_tx_packets(struct ag71xx *ag, bool flush); + +static inline unsigned int ag71xx_max_frame_len(unsigned int mtu) +{ + return ETH_SWITCH_HEADER_LEN + ETH_HLEN + VLAN_HLEN + mtu + ETH_FCS_LEN; +} + +static void ag71xx_dump_dma_regs(struct ag71xx *ag) +{ + DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n", + ag->dev->name, + ag71xx_rr(ag, AG71XX_REG_TX_CTRL), + ag71xx_rr(ag, AG71XX_REG_TX_DESC), + ag71xx_rr(ag, AG71XX_REG_TX_STATUS)); + + DBG("%s: dma_rx_ctrl=%08x, dma_rx_desc=%08x, dma_rx_status=%08x\n", + ag->dev->name, + ag71xx_rr(ag, AG71XX_REG_RX_CTRL), + ag71xx_rr(ag, AG71XX_REG_RX_DESC), + ag71xx_rr(ag, AG71XX_REG_RX_STATUS)); +} + +static void ag71xx_dump_regs(struct ag71xx *ag) +{ + DBG("%s: mac_cfg1=%08x, mac_cfg2=%08x, ipg=%08x, hdx=%08x, mfl=%08x\n", + ag->dev->name, + ag71xx_rr(ag, AG71XX_REG_MAC_CFG1), + ag71xx_rr(ag, AG71XX_REG_MAC_CFG2), + ag71xx_rr(ag, AG71XX_REG_MAC_IPG), + ag71xx_rr(ag, AG71XX_REG_MAC_HDX), + ag71xx_rr(ag, AG71XX_REG_MAC_MFL)); + DBG("%s: mac_ifctl=%08x, mac_addr1=%08x, mac_addr2=%08x\n", + ag->dev->name, + ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL), + ag71xx_rr(ag, AG71XX_REG_MAC_ADDR1), + ag71xx_rr(ag, AG71XX_REG_MAC_ADDR2)); + DBG("%s: fifo_cfg0=%08x, fifo_cfg1=%08x, fifo_cfg2=%08x\n", + ag->dev->name, + ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0), + ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1), + ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2)); + DBG("%s: fifo_cfg3=%08x, fifo_cfg4=%08x, fifo_cfg5=%08x\n", + ag->dev->name, + ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3), + ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4), + ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5)); +} + +static inline void ag71xx_dump_intr(struct ag71xx *ag, char *label, u32 intr) +{ + DBG("%s: %s intr=%08x %s%s%s%s%s%s\n", + ag->dev->name, label, intr, + (intr & AG71XX_INT_TX_PS) ? "TXPS " : "", + (intr & AG71XX_INT_TX_UR) ? "TXUR " : "", + (intr & AG71XX_INT_TX_BE) ? "TXBE " : "", + (intr & AG71XX_INT_RX_PR) ? "RXPR " : "", + (intr & AG71XX_INT_RX_OF) ? "RXOF " : "", + (intr & AG71XX_INT_RX_BE) ? "RXBE " : ""); +} + +static void ag71xx_ring_tx_clean(struct ag71xx *ag) +{ + struct ag71xx_ring *ring = &ag->tx_ring; + struct net_device *dev = ag->dev; + int ring_mask = BIT(ring->order) - 1; + u32 bytes_compl = 0, pkts_compl = 0; + + while (ring->curr != ring->dirty) { + struct ag71xx_desc *desc; + u32 i = ring->dirty & ring_mask; + + desc = ag71xx_ring_desc(ring, i); + if (!ag71xx_desc_empty(desc)) { + desc->ctrl = 0; + dev->stats.tx_errors++; + } + + if (ring->buf[i].skb) { + bytes_compl += ring->buf[i].len; + pkts_compl++; + dev_kfree_skb_any(ring->buf[i].skb); + } + ring->buf[i].skb = NULL; + ring->dirty++; + } + + /* flush descriptors */ + wmb(); + + netdev_completed_queue(dev, pkts_compl, bytes_compl); +} + +static void ag71xx_ring_tx_init(struct ag71xx *ag) +{ + struct ag71xx_ring *ring = &ag->tx_ring; + int ring_size = BIT(ring->order); + int ring_mask = BIT(ring->order) - 1; + int i; + + for (i = 0; i < ring_size; i++) { + struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i); + + desc->next = (u32) (ring->descs_dma + + AG71XX_DESC_SIZE * ((i + 1) & ring_mask)); + + desc->ctrl = DESC_EMPTY; + ring->buf[i].skb = NULL; + } + + /* flush descriptors */ + wmb(); + + ring->curr = 0; + ring->dirty = 0; + netdev_reset_queue(ag->dev); +} + +static void ag71xx_ring_rx_clean(struct ag71xx *ag) +{ + struct ag71xx_ring *ring = &ag->rx_ring; + int ring_size = BIT(ring->order); + int i; + + if (!ring->buf) + return; + + for (i = 0; i < ring_size; i++) + if (ring->buf[i].rx_buf) { + dma_unmap_single(&ag->pdev->dev, ring->buf[i].dma_addr, + ag->rx_buf_size, DMA_FROM_DEVICE); + skb_free_frag(ring->buf[i].rx_buf); + } +} + +static int ag71xx_buffer_size(struct ag71xx *ag) +{ + return ag->rx_buf_size + + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); +} + +static bool ag71xx_fill_rx_buf(struct ag71xx *ag, struct ag71xx_buf *buf, + int offset, + void *(*alloc)(unsigned int size)) +{ + struct ag71xx_ring *ring = &ag->rx_ring; + struct ag71xx_desc *desc = ag71xx_ring_desc(ring, buf - &ring->buf[0]); + void *data; + + data = alloc(ag71xx_buffer_size(ag)); + if (!data) + return false; + + buf->rx_buf = data; + buf->dma_addr = dma_map_single(&ag->pdev->dev, data, ag->rx_buf_size, + DMA_FROM_DEVICE); + desc->data = (u32) buf->dma_addr + offset; + return true; +} + +static int ag71xx_ring_rx_init(struct ag71xx *ag) +{ + struct ag71xx_ring *ring = &ag->rx_ring; + int ring_size = BIT(ring->order); + int ring_mask = BIT(ring->order) - 1; + unsigned int i; + int ret; + + ret = 0; + for (i = 0; i < ring_size; i++) { + struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i); + + desc->next = (u32) (ring->descs_dma + + AG71XX_DESC_SIZE * ((i + 1) & ring_mask)); + + DBG("ag71xx: RX desc at %p, next is %08x\n", + desc, desc->next); + } + + for (i = 0; i < ring_size; i++) { + struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i); + + if (!ag71xx_fill_rx_buf(ag, &ring->buf[i], ag->rx_buf_offset, + netdev_alloc_frag)) { + ret = -ENOMEM; + break; + } + + desc->ctrl = DESC_EMPTY; + } + + /* flush descriptors */ + wmb(); + + ring->curr = 0; + ring->dirty = 0; + + return ret; +} + +static int ag71xx_ring_rx_refill(struct ag71xx *ag) +{ + struct ag71xx_ring *ring = &ag->rx_ring; + int ring_mask = BIT(ring->order) - 1; + unsigned int count; + int offset = ag->rx_buf_offset; + + count = 0; + for (; ring->curr - ring->dirty > 0; ring->dirty++) { + struct ag71xx_desc *desc; + unsigned int i; + + i = ring->dirty & ring_mask; + desc = ag71xx_ring_desc(ring, i); + + if (!ring->buf[i].rx_buf && + !ag71xx_fill_rx_buf(ag, &ring->buf[i], offset, + napi_alloc_frag)) + break; + + desc->ctrl = DESC_EMPTY; + count++; + } + + /* flush descriptors */ + wmb(); + + DBG("%s: %u rx descriptors refilled\n", ag->dev->name, count); + + return count; +} + +static int ag71xx_rings_init(struct ag71xx *ag) +{ + struct ag71xx_ring *tx = &ag->tx_ring; + struct ag71xx_ring *rx = &ag->rx_ring; + int ring_size = BIT(tx->order) + BIT(rx->order); + int tx_size = BIT(tx->order); + + tx->buf = kzalloc(ring_size * sizeof(*tx->buf), GFP_KERNEL); + if (!tx->buf) + return -ENOMEM; + + tx->descs_cpu = dma_alloc_coherent(&ag->pdev->dev, ring_size * AG71XX_DESC_SIZE, + &tx->descs_dma, GFP_KERNEL); + if (!tx->descs_cpu) { + kfree(tx->buf); + tx->buf = NULL; + return -ENOMEM; + } + + rx->buf = &tx->buf[tx_size]; + rx->descs_cpu = ((void *)tx->descs_cpu) + tx_size * AG71XX_DESC_SIZE; + rx->descs_dma = tx->descs_dma + tx_size * AG71XX_DESC_SIZE; + + ag71xx_ring_tx_init(ag); + return ag71xx_ring_rx_init(ag); +} + +static void ag71xx_rings_free(struct ag71xx *ag) +{ + struct ag71xx_ring *tx = &ag->tx_ring; + struct ag71xx_ring *rx = &ag->rx_ring; + int ring_size = BIT(tx->order) + BIT(rx->order); + + if (tx->descs_cpu) + dma_free_coherent(&ag->pdev->dev, ring_size * AG71XX_DESC_SIZE, + tx->descs_cpu, tx->descs_dma); + + kfree(tx->buf); + + tx->descs_cpu = NULL; + rx->descs_cpu = NULL; + tx->buf = NULL; + rx->buf = NULL; +} + +static void ag71xx_rings_cleanup(struct ag71xx *ag) +{ + ag71xx_ring_rx_clean(ag); + ag71xx_ring_tx_clean(ag); + ag71xx_rings_free(ag); + + netdev_reset_queue(ag->dev); +} + +static unsigned char *ag71xx_speed_str(struct ag71xx *ag) +{ + switch (ag->speed) { + case SPEED_1000: + return "1000"; + case SPEED_100: + return "100"; + case SPEED_10: + return "10"; + } + + return "?"; +} + +static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac) +{ + u32 t; + + t = (((u32) mac[5]) << 24) | (((u32) mac[4]) << 16) + | (((u32) mac[3]) << 8) | ((u32) mac[2]); + + ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t); + + t = (((u32) mac[1]) << 24) | (((u32) mac[0]) << 16); + ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t); +} + +static void ag71xx_dma_reset(struct ag71xx *ag) +{ + u32 val; + int i; + + ag71xx_dump_dma_regs(ag); + + /* stop RX and TX */ + ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0); + ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0); + + /* + * give the hardware some time to really stop all rx/tx activity + * clearing the descriptors too early causes random memory corruption + */ + mdelay(1); + + /* clear descriptor addresses */ + ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->stop_desc_dma); + ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->stop_desc_dma); + + /* clear pending RX/TX interrupts */ + for (i = 0; i < 256; i++) { + ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR); + ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS); + } + + /* clear pending errors */ + ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF); + ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR); + + val = ag71xx_rr(ag, AG71XX_REG_RX_STATUS); + if (val) + pr_alert("%s: unable to clear DMA Rx status: %08x\n", + ag->dev->name, val); + + val = ag71xx_rr(ag, AG71XX_REG_TX_STATUS); + + /* mask out reserved bits */ + val &= ~0xff000000; + + if (val) + pr_alert("%s: unable to clear DMA Tx status: %08x\n", + ag->dev->name, val); + + ag71xx_dump_dma_regs(ag); +} + +#define MAC_CFG1_INIT (MAC_CFG1_RXE | MAC_CFG1_TXE | \ + MAC_CFG1_SRX | MAC_CFG1_STX) + +#define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT) + +#define FIFO_CFG4_INIT (FIFO_CFG4_DE | FIFO_CFG4_DV | FIFO_CFG4_FC | \ + FIFO_CFG4_CE | FIFO_CFG4_CR | FIFO_CFG4_LM | \ + FIFO_CFG4_LO | FIFO_CFG4_OK | FIFO_CFG4_MC | \ + FIFO_CFG4_BC | FIFO_CFG4_DR | FIFO_CFG4_LE | \ + FIFO_CFG4_CF | FIFO_CFG4_PF | FIFO_CFG4_UO | \ + FIFO_CFG4_VT) + +#define FIFO_CFG5_INIT (FIFO_CFG5_DE | FIFO_CFG5_DV | FIFO_CFG5_FC | \ + FIFO_CFG5_CE | FIFO_CFG5_LO | FIFO_CFG5_OK | \ + FIFO_CFG5_MC | FIFO_CFG5_BC | FIFO_CFG5_DR | \ + FIFO_CFG5_CF | FIFO_CFG5_PF | FIFO_CFG5_VT | \ + FIFO_CFG5_LE | FIFO_CFG5_FT | FIFO_CFG5_16 | \ + FIFO_CFG5_17 | FIFO_CFG5_SF) + +static void ag71xx_hw_stop(struct ag71xx *ag) +{ + /* disable all interrupts and stop the rx/tx engine */ + ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0); + ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0); + ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0); +} + +static void ag71xx_hw_setup(struct ag71xx *ag) +{ + struct device_node *np = ag->pdev->dev.of_node; + u32 init = MAC_CFG1_INIT; + + /* setup MAC configuration registers */ + if (of_property_read_bool(np, "flow-control")) + init |= MAC_CFG1_TFC | MAC_CFG1_RFC; + ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, init); + + ag71xx_sb(ag, AG71XX_REG_MAC_CFG2, + MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK); + + /* setup max frame length to zero */ + ag71xx_wr(ag, AG71XX_REG_MAC_MFL, 0); + + /* setup FIFO configuration registers */ + ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT); + ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, ag->fifodata[0]); + ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, ag->fifodata[1]); + ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT); + ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT); +} + +static void ag71xx_hw_init(struct ag71xx *ag) +{ + ag71xx_hw_stop(ag); + + ag71xx_sb(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_SR); + udelay(20); + + reset_control_assert(ag->mac_reset); + if (ag->mdio_reset) + reset_control_assert(ag->mdio_reset); + msleep(100); + reset_control_deassert(ag->mac_reset); + if (ag->mdio_reset) + reset_control_deassert(ag->mdio_reset); + msleep(200); + + ag71xx_hw_setup(ag); + + ag71xx_dma_reset(ag); +} + +static void ag71xx_fast_reset(struct ag71xx *ag) +{ + struct net_device *dev = ag->dev; + u32 rx_ds; + u32 mii_reg; + + ag71xx_hw_stop(ag); + wmb(); + + mii_reg = ag71xx_rr(ag, AG71XX_REG_MII_CFG); + rx_ds = ag71xx_rr(ag, AG71XX_REG_RX_DESC); + + ag71xx_tx_packets(ag, true); + + reset_control_assert(ag->mac_reset); + udelay(10); + reset_control_deassert(ag->mac_reset); + udelay(10); + + ag71xx_dma_reset(ag); + ag71xx_hw_setup(ag); + ag->tx_ring.curr = 0; + ag->tx_ring.dirty = 0; + netdev_reset_queue(ag->dev); + + /* setup max frame length */ + ag71xx_wr(ag, AG71XX_REG_MAC_MFL, + ag71xx_max_frame_len(ag->dev->mtu)); + + ag71xx_wr(ag, AG71XX_REG_RX_DESC, rx_ds); + ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma); + ag71xx_wr(ag, AG71XX_REG_MII_CFG, mii_reg); + + ag71xx_hw_set_macaddr(ag, dev->dev_addr); +} + +static void ag71xx_hw_start(struct ag71xx *ag) +{ + /* start RX engine */ + ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE); + + /* enable interrupts */ + ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, AG71XX_INT_INIT); + + netif_wake_queue(ag->dev); +} + +static void ath79_set_pllval(struct ag71xx *ag) +{ + u32 pll_reg = ag->pllreg[1]; + u32 pll_val; + + if (!ag->pllregmap) + return; + + switch (ag->speed) { + case SPEED_10: + pll_val = ag->plldata[2]; + break; + case SPEED_100: + pll_val = ag->plldata[1]; + break; + case SPEED_1000: + pll_val = ag->plldata[0]; + break; + default: + BUG(); + } + + if (pll_val) + regmap_write(ag->pllregmap, pll_reg, pll_val); +} + +static void ath79_set_pll(struct ag71xx *ag) +{ + u32 pll_cfg = ag->pllreg[0]; + u32 pll_shift = ag->pllreg[2]; + + if (!ag->pllregmap) + return; + + regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 2 << pll_shift); + udelay(100); + + ath79_set_pllval(ag); + + regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 3 << pll_shift); + udelay(100); + + regmap_update_bits(ag->pllregmap, pll_cfg, 3 << pll_shift, 0); + udelay(100); +} + +static void ag71xx_bit_set(void __iomem *reg, u32 bit) +{ + u32 val; + + val = __raw_readl(reg) | bit; + __raw_writel(val, reg); + __raw_readl(reg); +} + +static void ag71xx_bit_clear(void __iomem *reg, u32 bit) +{ + u32 val; + + val = __raw_readl(reg) & ~bit; + __raw_writel(val, reg); + __raw_readl(reg); +} + +static void ag71xx_sgmii_init_qca955x(struct device_node *np) +{ + struct device_node *np_dev; + void __iomem *gmac_base; + u32 mr_an_status; + u32 sgmii_status; + u8 tries = 0; + int err = 0; + + np = of_get_child_by_name(np, "gmac-config"); + if (!np) + return; + + np_dev = of_parse_phandle(np, "device", 0); + if (!np_dev) + goto out; + + gmac_base = of_iomap(np_dev, 0); + if (!gmac_base) { + pr_err("%pOF: can't map GMAC registers\n", np_dev); + err = -ENOMEM; + goto err_iomap; + } + + mr_an_status = __raw_readl(gmac_base + QCA955X_GMAC_REG_MR_AN_STATUS); + if (!(mr_an_status & QCA955X_MR_AN_STATUS_AN_ABILITY)) + goto sgmii_out; + + /* SGMII reset sequence */ + __raw_writel(QCA955X_SGMII_RESET_RX_CLK_N_RESET, + gmac_base + QCA955X_GMAC_REG_SGMII_RESET); + __raw_readl(gmac_base + QCA955X_GMAC_REG_SGMII_RESET); + udelay(10); + + ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET, + QCA955X_SGMII_RESET_HW_RX_125M_N); + udelay(10); + + ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET, + QCA955X_SGMII_RESET_RX_125M_N); + udelay(10); + + ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET, + QCA955X_SGMII_RESET_TX_125M_N); + udelay(10); + + ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET, + QCA955X_SGMII_RESET_RX_CLK_N); + udelay(10); + + ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_SGMII_RESET, + QCA955X_SGMII_RESET_TX_CLK_N); + udelay(10); + + /* + * The following is what QCA has to say about what happens here: + * + * Across resets SGMII link status goes to weird state. + * If SGMII_DEBUG register reads other than 0x1f or 0x10, + * we are for sure in a bad state. + * + * Issue a PHY reset in MR_AN_CONTROL to keep going. + */ + do { + ag71xx_bit_set(gmac_base + QCA955X_GMAC_REG_MR_AN_CONTROL, + QCA955X_MR_AN_CONTROL_PHY_RESET | + QCA955X_MR_AN_CONTROL_AN_ENABLE); + udelay(200); + ag71xx_bit_clear(gmac_base + QCA955X_GMAC_REG_MR_AN_CONTROL, + QCA955X_MR_AN_CONTROL_PHY_RESET); + mdelay(300); + sgmii_status = __raw_readl(gmac_base + QCA955X_GMAC_REG_SGMII_DEBUG) & + QCA955X_SGMII_DEBUG_TX_STATE_MASK; + + if (tries++ >= 20) { + pr_err("ag71xx: max retries for SGMII fixup exceeded\n"); + break; + } + } while (!(sgmii_status == 0xf || sgmii_status == 0x10)); + +sgmii_out: + iounmap(gmac_base); +err_iomap: + of_node_put(np_dev); +out: + of_node_put(np); +} + +static void ath79_mii_ctrl_set_if(struct ag71xx *ag, unsigned int mii_if) +{ + u32 t; + + t = __raw_readl(ag->mii_base); + t &= ~(AR71XX_MII_CTRL_IF_MASK); + t |= (mii_if & AR71XX_MII_CTRL_IF_MASK); + __raw_writel(t, ag->mii_base); +} + +static void ath79_mii0_ctrl_set_if(struct ag71xx *ag) +{ + unsigned int mii_if; + + switch (ag->phy_if_mode) { + case PHY_INTERFACE_MODE_MII: + mii_if = AR71XX_MII0_CTRL_IF_MII; + break; + case PHY_INTERFACE_MODE_GMII: + mii_if = AR71XX_MII0_CTRL_IF_GMII; + break; + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + mii_if = AR71XX_MII0_CTRL_IF_RGMII; + break; + case PHY_INTERFACE_MODE_RMII: + mii_if = AR71XX_MII0_CTRL_IF_RMII; + break; + default: + WARN(1, "Impossible PHY mode defined.\n"); + return; + } + + ath79_mii_ctrl_set_if(ag, mii_if); +} + +static void ath79_mii1_ctrl_set_if(struct ag71xx *ag) +{ + unsigned int mii_if; + + switch (ag->phy_if_mode) { + case PHY_INTERFACE_MODE_RMII: + mii_if = AR71XX_MII1_CTRL_IF_RMII; + break; + case PHY_INTERFACE_MODE_RGMII: + case PHY_INTERFACE_MODE_RGMII_ID: + mii_if = AR71XX_MII1_CTRL_IF_RGMII; + break; + default: + WARN(1, "Impossible PHY mode defined.\n"); + return; + } + + ath79_mii_ctrl_set_if(ag, mii_if); +} + +static void ath79_mii_ctrl_set_speed(struct ag71xx *ag) +{ + unsigned int mii_speed; + u32 t; + + if (!ag->mii_base) + return; + + switch (ag->speed) { + case SPEED_10: + mii_speed = AR71XX_MII_CTRL_SPEED_10; + break; + case SPEED_100: + mii_speed = AR71XX_MII_CTRL_SPEED_100; + break; + case SPEED_1000: + mii_speed = AR71XX_MII_CTRL_SPEED_1000; + break; + default: + BUG(); + } + + t = __raw_readl(ag->mii_base); + t &= ~(AR71XX_MII_CTRL_SPEED_MASK << AR71XX_MII_CTRL_SPEED_SHIFT); + t |= mii_speed << AR71XX_MII_CTRL_SPEED_SHIFT; + __raw_writel(t, ag->mii_base); +} + +static void +__ag71xx_link_adjust(struct ag71xx *ag, bool update) +{ + struct device_node *np = ag->pdev->dev.of_node; + u32 cfg2; + u32 ifctl; + u32 fifo5; + + if (!ag->link && update) { + ag71xx_hw_stop(ag); + netif_carrier_off(ag->dev); + if (netif_msg_link(ag)) + pr_info("%s: link down\n", ag->dev->name); + return; + } + + if (!of_device_is_compatible(np, "qca,ar9130-eth") && + !of_device_is_compatible(np, "qca,ar7100-eth")) + ag71xx_fast_reset(ag); + + cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2); + cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX); + cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0; + + ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL); + ifctl &= ~(MAC_IFCTL_SPEED); + + fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5); + fifo5 &= ~FIFO_CFG5_BM; + + switch (ag->speed) { + case SPEED_1000: + cfg2 |= MAC_CFG2_IF_1000; + fifo5 |= FIFO_CFG5_BM; + break; + case SPEED_100: + cfg2 |= MAC_CFG2_IF_10_100; + ifctl |= MAC_IFCTL_SPEED; + break; + case SPEED_10: + cfg2 |= MAC_CFG2_IF_10_100; + break; + default: + BUG(); + return; + } + + if (ag->tx_ring.desc_split) { + ag->fifodata[2] &= 0xffff; + ag->fifodata[2] |= ((2048 - ag->tx_ring.desc_split) / 4) << 16; + } + + ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, ag->fifodata[2]); + + if (update) { + if (of_device_is_compatible(np, "qca,ar7100-eth") || + of_device_is_compatible(np, "qca,ar9130-eth")) { + ath79_set_pll(ag); + ath79_mii_ctrl_set_speed(ag); + } else if (of_device_is_compatible(np, "qca,ar7242-eth") || + of_device_is_compatible(np, "qca,ar9340-eth") || + of_device_is_compatible(np, "qca,qca9550-eth") || + of_device_is_compatible(np, "qca,qca9560-eth")) { + ath79_set_pllval(ag); + if (of_property_read_bool(np, "qca955x-sgmii-fixup")) + ag71xx_sgmii_init_qca955x(np); + } + } + + ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2); + ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5); + ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl); + + if (of_device_is_compatible(np, "qca,qca9530-eth") || + of_device_is_compatible(np, "qca,qca9560-eth")) { + /* + * The rx ring buffer can stall on small packets on QCA953x and + * QCA956x. Disabling the inline checksum engine fixes the stall. + * The wr, rr functions cannot be used since this hidden register + * is outside of the normal ag71xx register block. + */ + void __iomem *dam = ioremap_nocache(0xb90001bc, 0x4); + if (dam) { + __raw_writel(__raw_readl(dam) & ~BIT(27), dam); + (void)__raw_readl(dam); + iounmap(dam); + } + } + + ag71xx_hw_start(ag); + + netif_carrier_on(ag->dev); + if (update && netif_msg_link(ag)) + pr_info("%s: link up (%sMbps/%s duplex)\n", + ag->dev->name, + ag71xx_speed_str(ag), + (DUPLEX_FULL == ag->duplex) ? "Full" : "Half"); + + ag71xx_dump_regs(ag); +} + +void ag71xx_link_adjust(struct ag71xx *ag) +{ + __ag71xx_link_adjust(ag, true); +} + +static int ag71xx_hw_enable(struct ag71xx *ag) +{ + int ret; + + ret = ag71xx_rings_init(ag); + if (ret) + return ret; + + napi_enable(&ag->napi); + ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->tx_ring.descs_dma); + ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->rx_ring.descs_dma); + netif_start_queue(ag->dev); + + return 0; +} + +static void ag71xx_hw_disable(struct ag71xx *ag) +{ + netif_stop_queue(ag->dev); + + ag71xx_hw_stop(ag); + ag71xx_dma_reset(ag); + + napi_disable(&ag->napi); + del_timer_sync(&ag->oom_timer); + + ag71xx_rings_cleanup(ag); +} + +static int ag71xx_open(struct net_device *dev) +{ + struct ag71xx *ag = netdev_priv(dev); + unsigned int max_frame_len; + int ret; + + netif_carrier_off(dev); + max_frame_len = ag71xx_max_frame_len(dev->mtu); + ag->rx_buf_size = SKB_DATA_ALIGN(max_frame_len + NET_SKB_PAD + NET_IP_ALIGN); + + /* setup max frame length */ + ag71xx_wr(ag, AG71XX_REG_MAC_MFL, max_frame_len); + ag71xx_hw_set_macaddr(ag, dev->dev_addr); + + ret = ag71xx_hw_enable(ag); + if (ret) + goto err; + + phy_start(ag->phy_dev); + + return 0; + +err: + ag71xx_rings_cleanup(ag); + return ret; +} + +static int ag71xx_stop(struct net_device *dev) +{ + unsigned long flags; + struct ag71xx *ag = netdev_priv(dev); + + netif_carrier_off(dev); + phy_stop(ag->phy_dev); + + spin_lock_irqsave(&ag->lock, flags); + if (ag->link) { + ag->link = 0; + ag71xx_link_adjust(ag); + } + spin_unlock_irqrestore(&ag->lock, flags); + + ag71xx_hw_disable(ag); + + return 0; +} + +static int ag71xx_fill_dma_desc(struct ag71xx_ring *ring, u32 addr, int len) +{ + int i; + struct ag71xx_desc *desc; + int ring_mask = BIT(ring->order) - 1; + int ndesc = 0; + int split = ring->desc_split; + + if (!split) + split = len; + + while (len > 0) { + unsigned int cur_len = len; + + i = (ring->curr + ndesc) & ring_mask; + desc = ag71xx_ring_desc(ring, i); + + if (!ag71xx_desc_empty(desc)) + return -1; + + if (cur_len > split) { + cur_len = split; + + /* + * TX will hang if DMA transfers <= 4 bytes, + * make sure next segment is more than 4 bytes long. + */ + if (len <= split + 4) + cur_len -= 4; + } + + desc->data = addr; + addr += cur_len; + len -= cur_len; + + if (len > 0) + cur_len |= DESC_MORE; + + /* prevent early tx attempt of this descriptor */ + if (!ndesc) + cur_len |= DESC_EMPTY; + + desc->ctrl = cur_len; + ndesc++; + } + + return ndesc; +} + +static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct ag71xx *ag = netdev_priv(dev); + struct ag71xx_ring *ring = &ag->tx_ring; + int ring_mask = BIT(ring->order) - 1; + int ring_size = BIT(ring->order); + struct ag71xx_desc *desc; + dma_addr_t dma_addr; + int i, n, ring_min; + + if (skb->len <= 4) { + DBG("%s: packet len is too small\n", ag->dev->name); + goto err_drop; + } + + dma_addr = dma_map_single(&ag->pdev->dev, skb->data, skb->len, + DMA_TO_DEVICE); + + i = ring->curr & ring_mask; + desc = ag71xx_ring_desc(ring, i); + + /* setup descriptor fields */ + n = ag71xx_fill_dma_desc(ring, (u32) dma_addr, skb->len & ag->desc_pktlen_mask); + if (n < 0) + goto err_drop_unmap; + + i = (ring->curr + n - 1) & ring_mask; + ring->buf[i].len = skb->len; + ring->buf[i].skb = skb; + + netdev_sent_queue(dev, skb->len); + + skb_tx_timestamp(skb); + + desc->ctrl &= ~DESC_EMPTY; + ring->curr += n; + + /* flush descriptor */ + wmb(); + + ring_min = 2; + if (ring->desc_split) + ring_min *= AG71XX_TX_RING_DS_PER_PKT; + + if (ring->curr - ring->dirty >= ring_size - ring_min) { + DBG("%s: tx queue full\n", dev->name); + netif_stop_queue(dev); + } + + DBG("%s: packet injected into TX queue\n", ag->dev->name); + + /* enable TX engine */ + ag71xx_wr(ag, AG71XX_REG_TX_CTRL, TX_CTRL_TXE); + + return NETDEV_TX_OK; + +err_drop_unmap: + dma_unmap_single(&ag->pdev->dev, dma_addr, skb->len, DMA_TO_DEVICE); + +err_drop: + dev->stats.tx_dropped++; + + dev_kfree_skb(skb); + return NETDEV_TX_OK; +} + +static int ag71xx_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) +{ + struct ag71xx *ag = netdev_priv(dev); + + + switch (cmd) { + case SIOCSIFHWADDR: + if (copy_from_user + (dev->dev_addr, ifr->ifr_data, sizeof(dev->dev_addr))) + return -EFAULT; + return 0; + + case SIOCGIFHWADDR: + if (copy_to_user + (ifr->ifr_data, dev->dev_addr, sizeof(dev->dev_addr))) + return -EFAULT; + return 0; + + case SIOCGMIIPHY: + case SIOCGMIIREG: + case SIOCSMIIREG: + if (ag->phy_dev == NULL) + break; + + return phy_mii_ioctl(ag->phy_dev, ifr, cmd); + + default: + break; + } + + return -EOPNOTSUPP; +} + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,15,0)) +static void ag71xx_oom_timer_handler(unsigned long data) +{ + struct net_device *dev = (struct net_device *) data; + struct ag71xx *ag = netdev_priv(dev); +#else +static void ag71xx_oom_timer_handler(struct timer_list *t) +{ + struct ag71xx *ag = from_timer(ag, t, oom_timer); +#endif + + napi_schedule(&ag->napi); +} + +static void ag71xx_tx_timeout(struct net_device *dev) +{ + struct ag71xx *ag = netdev_priv(dev); + + if (netif_msg_tx_err(ag)) + pr_info("%s: tx timeout\n", ag->dev->name); + + schedule_delayed_work(&ag->restart_work, 1); +} + +static void ag71xx_restart_work_func(struct work_struct *work) +{ + struct ag71xx *ag = container_of(work, struct ag71xx, restart_work.work); + + rtnl_lock(); + ag71xx_hw_disable(ag); + ag71xx_hw_enable(ag); + if (ag->link) + __ag71xx_link_adjust(ag, false); + rtnl_unlock(); +} + +static bool ag71xx_check_dma_stuck(struct ag71xx *ag) +{ + unsigned long timestamp; + u32 rx_sm, tx_sm, rx_fd; + + timestamp = netdev_get_tx_queue(ag->dev, 0)->trans_start; + if (likely(time_before(jiffies, timestamp + HZ/10))) + return false; + + if (!netif_carrier_ok(ag->dev)) + return false; + + rx_sm = ag71xx_rr(ag, AG71XX_REG_RX_SM); + if ((rx_sm & 0x7) == 0x3 && ((rx_sm >> 4) & 0x7) == 0x6) + return true; + + tx_sm = ag71xx_rr(ag, AG71XX_REG_TX_SM); + rx_fd = ag71xx_rr(ag, AG71XX_REG_FIFO_DEPTH); + if (((tx_sm >> 4) & 0x7) == 0 && ((rx_sm & 0x7) == 0) && + ((rx_sm >> 4) & 0x7) == 0 && rx_fd == 0) + return true; + + return false; +} + +static int ag71xx_tx_packets(struct ag71xx *ag, bool flush) +{ + struct ag71xx_ring *ring = &ag->tx_ring; + bool dma_stuck = false; + int ring_mask = BIT(ring->order) - 1; + int ring_size = BIT(ring->order); + int sent = 0; + int bytes_compl = 0; + int n = 0; + + DBG("%s: processing TX ring\n", ag->dev->name); + + while (ring->dirty + n != ring->curr) { + unsigned int i = (ring->dirty + n) & ring_mask; + struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i); + struct sk_buff *skb = ring->buf[i].skb; + + if (!flush && !ag71xx_desc_empty(desc)) { + if (ag->tx_hang_workaround && + ag71xx_check_dma_stuck(ag)) { + schedule_delayed_work(&ag->restart_work, HZ / 2); + dma_stuck = true; + } + break; + } + + if (flush) + desc->ctrl |= DESC_EMPTY; + + n++; + if (!skb) + continue; + + dev_kfree_skb_any(skb); + ring->buf[i].skb = NULL; + + bytes_compl += ring->buf[i].len; + + sent++; + ring->dirty += n; + + while (n > 0) { + ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS); + n--; + } + } + + DBG("%s: %d packets sent out\n", ag->dev->name, sent); + + if (!sent) + return 0; + + ag->dev->stats.tx_bytes += bytes_compl; + ag->dev->stats.tx_packets += sent; + + netdev_completed_queue(ag->dev, sent, bytes_compl); + if ((ring->curr - ring->dirty) < (ring_size * 3) / 4) + netif_wake_queue(ag->dev); + + if (!dma_stuck) + cancel_delayed_work(&ag->restart_work); + + return sent; +} + +static int ag71xx_rx_packets(struct ag71xx *ag, int limit) +{ + struct net_device *dev = ag->dev; + struct ag71xx_ring *ring = &ag->rx_ring; + unsigned int pktlen_mask = ag->desc_pktlen_mask; + unsigned int offset = ag->rx_buf_offset; + int ring_mask = BIT(ring->order) - 1; + int ring_size = BIT(ring->order); +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0)) + struct list_head rx_list; + struct sk_buff *next; +#else + struct sk_buff_head queue; +#endif + struct sk_buff *skb; + int done = 0; + + DBG("%s: rx packets, limit=%d, curr=%u, dirty=%u\n", + dev->name, limit, ring->curr, ring->dirty); +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0)) + INIT_LIST_HEAD(&rx_list); +#else + skb_queue_head_init(&queue); +#endif + + while (done < limit) { + unsigned int i = ring->curr & ring_mask; + struct ag71xx_desc *desc = ag71xx_ring_desc(ring, i); + int pktlen; + int err = 0; + + if (ag71xx_desc_empty(desc)) + break; + + if ((ring->dirty + ring_size) == ring->curr) { + ag71xx_assert(0); + break; + } + + ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR); + + pktlen = desc->ctrl & pktlen_mask; + pktlen -= ETH_FCS_LEN; + + dma_unmap_single(&ag->pdev->dev, ring->buf[i].dma_addr, + ag->rx_buf_size, DMA_FROM_DEVICE); + + dev->stats.rx_packets++; + dev->stats.rx_bytes += pktlen; + + skb = build_skb(ring->buf[i].rx_buf, ag71xx_buffer_size(ag)); + if (!skb) { + skb_free_frag(ring->buf[i].rx_buf); + goto next; + } + + skb_reserve(skb, offset); + skb_put(skb, pktlen); + + if (err) { + dev->stats.rx_dropped++; + kfree_skb(skb); + } else { + skb->dev = dev; + skb->ip_summed = CHECKSUM_NONE; +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0)) + list_add_tail(&skb->list, &rx_list); +#else + __skb_queue_tail(&queue, skb); +#endif + } + +next: + ring->buf[i].rx_buf = NULL; + done++; + + ring->curr++; + } + + ag71xx_ring_rx_refill(ag); + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,19,0)) + list_for_each_entry_safe(skb, next, &rx_list, list) + skb->protocol = eth_type_trans(skb, dev); + netif_receive_skb_list(&rx_list); +#else + while ((skb = __skb_dequeue(&queue)) != NULL) { + skb->protocol = eth_type_trans(skb, dev); + netif_receive_skb(skb); + } +#endif + + DBG("%s: rx finish, curr=%u, dirty=%u, done=%d\n", + dev->name, ring->curr, ring->dirty, done); + + return done; +} + +static int ag71xx_poll(struct napi_struct *napi, int limit) +{ + struct ag71xx *ag = container_of(napi, struct ag71xx, napi); + struct net_device *dev = ag->dev; + struct ag71xx_ring *rx_ring = &ag->rx_ring; + int rx_ring_size = BIT(rx_ring->order); + unsigned long flags; + u32 status; + int tx_done; + int rx_done; + + tx_done = ag71xx_tx_packets(ag, false); + + DBG("%s: processing RX ring\n", dev->name); + rx_done = ag71xx_rx_packets(ag, limit); + + ag71xx_debugfs_update_napi_stats(ag, rx_done, tx_done); + + if (rx_ring->buf[rx_ring->dirty % rx_ring_size].rx_buf == NULL) + goto oom; + + status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS); + if (unlikely(status & RX_STATUS_OF)) { + ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_OF); + dev->stats.rx_fifo_errors++; + + /* restart RX */ + ag71xx_wr(ag, AG71XX_REG_RX_CTRL, RX_CTRL_RXE); + } + + if (rx_done < limit) { + if (status & RX_STATUS_PR) + goto more; + + status = ag71xx_rr(ag, AG71XX_REG_TX_STATUS); + if (status & TX_STATUS_PS) + goto more; + + DBG("%s: disable polling mode, rx=%d, tx=%d,limit=%d\n", + dev->name, rx_done, tx_done, limit); + + napi_complete(napi); + + /* enable interrupts */ + spin_lock_irqsave(&ag->lock, flags); + ag71xx_int_enable(ag, AG71XX_INT_POLL); + spin_unlock_irqrestore(&ag->lock, flags); + return rx_done; + } + +more: + DBG("%s: stay in polling mode, rx=%d, tx=%d, limit=%d\n", + dev->name, rx_done, tx_done, limit); + return limit; + +oom: + if (netif_msg_rx_err(ag)) + pr_info("%s: out of memory\n", dev->name); + + mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL); + napi_complete(napi); + return 0; +} + +static irqreturn_t ag71xx_interrupt(int irq, void *dev_id) +{ + struct net_device *dev = dev_id; + struct ag71xx *ag = netdev_priv(dev); + u32 status; + + status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS); + ag71xx_dump_intr(ag, "raw", status); + + if (unlikely(!status)) + return IRQ_NONE; + + if (unlikely(status & AG71XX_INT_ERR)) { + if (status & AG71XX_INT_TX_BE) { + ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE); + dev_err(&dev->dev, "TX BUS error\n"); + } + if (status & AG71XX_INT_RX_BE) { + ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE); + dev_err(&dev->dev, "RX BUS error\n"); + } + } + + if (likely(status & AG71XX_INT_POLL)) { + ag71xx_int_disable(ag, AG71XX_INT_POLL); + DBG("%s: enable polling mode\n", dev->name); + napi_schedule(&ag->napi); + } + + ag71xx_debugfs_update_int_stats(ag, status); + + return IRQ_HANDLED; +} + +static int ag71xx_change_mtu(struct net_device *dev, int new_mtu) +{ + struct ag71xx *ag = netdev_priv(dev); + + dev->mtu = new_mtu; + ag71xx_wr(ag, AG71XX_REG_MAC_MFL, + ag71xx_max_frame_len(dev->mtu)); + + return 0; +} + +static const struct net_device_ops ag71xx_netdev_ops = { + .ndo_open = ag71xx_open, + .ndo_stop = ag71xx_stop, + .ndo_start_xmit = ag71xx_hard_start_xmit, + .ndo_do_ioctl = ag71xx_do_ioctl, + .ndo_tx_timeout = ag71xx_tx_timeout, + .ndo_change_mtu = ag71xx_change_mtu, + .ndo_set_mac_address = eth_mac_addr, + .ndo_validate_addr = eth_validate_addr, +}; + +static int ag71xx_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct net_device *dev; + struct resource *res; + struct ag71xx *ag; + const void *mac_addr; + u32 max_frame_len; + int tx_size, err; + + if (!np) + return -ENODEV; + + dev = devm_alloc_etherdev(&pdev->dev, sizeof(*ag)); + if (!dev) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; + + err = ag71xx_setup_gmac(np); + if (err) + return err; + + SET_NETDEV_DEV(dev, &pdev->dev); + + ag = netdev_priv(dev); + ag->pdev = pdev; + ag->dev = dev; + ag->msg_enable = netif_msg_init(ag71xx_msg_level, + AG71XX_DEFAULT_MSG_ENABLE); + spin_lock_init(&ag->lock); + + ag->mac_reset = devm_reset_control_get_exclusive(&pdev->dev, "mac"); + if (IS_ERR(ag->mac_reset)) { + dev_err(&pdev->dev, "missing mac reset\n"); + return PTR_ERR(ag->mac_reset); + } + + ag->mdio_reset = devm_reset_control_get_optional_exclusive(&pdev->dev, "mdio"); + + if (of_property_read_u32_array(np, "fifo-data", ag->fifodata, 3)) { + if (of_device_is_compatible(np, "qca,ar9130-eth") || + of_device_is_compatible(np, "qca,ar7100-eth")) { + ag->fifodata[0] = 0x0fff0000; + ag->fifodata[1] = 0x00001fff; + } else { + ag->fifodata[0] = 0x0010ffff; + ag->fifodata[1] = 0x015500aa; + ag->fifodata[2] = 0x01f00140; + } + if (of_device_is_compatible(np, "qca,ar9130-eth")) + ag->fifodata[2] = 0x00780fff; + else if (of_device_is_compatible(np, "qca,ar7100-eth")) + ag->fifodata[2] = 0x008001ff; + } + + if (of_property_read_u32_array(np, "pll-data", ag->plldata, 3)) + dev_dbg(&pdev->dev, "failed to read pll-data property\n"); + + if (of_property_read_u32_array(np, "pll-reg", ag->pllreg, 3)) + dev_dbg(&pdev->dev, "failed to read pll-reg property\n"); + + ag->pllregmap = syscon_regmap_lookup_by_phandle(np, "pll-handle"); + if (IS_ERR(ag->pllregmap)) { + dev_dbg(&pdev->dev, "failed to read pll-handle property\n"); + ag->pllregmap = NULL; + } + + ag->mac_base = devm_ioremap_nocache(&pdev->dev, res->start, + res->end - res->start + 1); + if (!ag->mac_base) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (res) { + ag->mii_base = devm_ioremap_nocache(&pdev->dev, res->start, + res->end - res->start + 1); + if (!ag->mii_base) + return -ENOMEM; + } + + dev->irq = platform_get_irq(pdev, 0); + err = devm_request_irq(&pdev->dev, dev->irq, ag71xx_interrupt, + 0x0, dev_name(&pdev->dev), dev); + if (err) { + dev_err(&pdev->dev, "unable to request IRQ %d\n", dev->irq); + return err; + } + + dev->netdev_ops = &ag71xx_netdev_ops; + dev->ethtool_ops = &ag71xx_ethtool_ops; + + INIT_DELAYED_WORK(&ag->restart_work, ag71xx_restart_work_func); + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(4,15,0)) + init_timer(&ag->oom_timer); + ag->oom_timer.data = (unsigned long) dev; + ag->oom_timer.function = ag71xx_oom_timer_handler; +#else + timer_setup(&ag->oom_timer, ag71xx_oom_timer_handler, 0); +#endif + + tx_size = AG71XX_TX_RING_SIZE_DEFAULT; + ag->rx_ring.order = ag71xx_ring_size_order(AG71XX_RX_RING_SIZE_DEFAULT); + + if (of_device_is_compatible(np, "qca,ar9340-eth") || + of_device_is_compatible(np, "qca,qca9530-eth") || + of_device_is_compatible(np, "qca,qca9550-eth") || + of_device_is_compatible(np, "qca,qca9560-eth")) + ag->desc_pktlen_mask = SZ_16K - 1; + else + ag->desc_pktlen_mask = SZ_4K - 1; + + if (ag->desc_pktlen_mask == SZ_16K - 1 && + !of_device_is_compatible(np, "qca,qca9550-eth") && + !of_device_is_compatible(np, "qca,qca9560-eth")) + max_frame_len = ag->desc_pktlen_mask; + else + max_frame_len = 1540; + + dev->min_mtu = 68; + dev->max_mtu = max_frame_len - ag71xx_max_frame_len(0); + + if (of_device_is_compatible(np, "qca,ar7240-eth") || + of_device_is_compatible(np, "qca,ar7241-eth") || + of_device_is_compatible(np, "qca,ar7242-eth") || + of_device_is_compatible(np, "qca,ar9330-eth") || + of_device_is_compatible(np, "qca,ar9340-eth") || + of_device_is_compatible(np, "qca,qca9530-eth") || + of_device_is_compatible(np, "qca,qca9550-eth") || + of_device_is_compatible(np, "qca,qca9560-eth")) + ag->tx_hang_workaround = 1; + + ag->rx_buf_offset = NET_SKB_PAD; + if (!of_device_is_compatible(np, "qca,ar7100-eth") && + !of_device_is_compatible(np, "qca,ar9130-eth")) + ag->rx_buf_offset += NET_IP_ALIGN; + + if (of_device_is_compatible(np, "qca,ar7100-eth")) { + ag->tx_ring.desc_split = AG71XX_TX_RING_SPLIT; + tx_size *= AG71XX_TX_RING_DS_PER_PKT; + } + ag->tx_ring.order = ag71xx_ring_size_order(tx_size); + + ag->stop_desc = dmam_alloc_coherent(&pdev->dev, + sizeof(struct ag71xx_desc), + &ag->stop_desc_dma, GFP_KERNEL); + if (!ag->stop_desc) + return -ENOMEM; + + ag->stop_desc->data = 0; + ag->stop_desc->ctrl = 0; + ag->stop_desc->next = (u32) ag->stop_desc_dma; + + mac_addr = of_get_mac_address(np); +#if (LINUX_VERSION_CODE < KERNEL_VERSION(5,2,0)) + if (!mac_addr || !is_valid_ether_addr(mac_addr)) { +#else + if (IS_ERR(mac_addr) || !is_valid_ether_addr(mac_addr)) { +#endif + dev_err(&pdev->dev, "invalid MAC address, using random address\n"); + eth_random_addr(dev->dev_addr); + } else { + memcpy(dev->dev_addr, mac_addr, ETH_ALEN); + } + + ag->phy_if_mode = of_get_phy_mode(np); + if (ag->phy_if_mode < 0) { + dev_err(&pdev->dev, "missing phy-mode property in DT\n"); + return ag->phy_if_mode; + } + + if (of_property_read_u32(np, "qca,mac-idx", &ag->mac_idx)) + ag->mac_idx = -1; + if (ag->mii_base) + switch (ag->mac_idx) { + case 0: + ath79_mii0_ctrl_set_if(ag); + break; + case 1: + ath79_mii1_ctrl_set_if(ag); + break; + default: + break; + } + + netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT); + + ag71xx_dump_regs(ag); + + ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, 0); + + ag71xx_hw_init(ag); + + ag71xx_dump_regs(ag); + + /* + * populate current node to register mdio-bus as a subdevice. + * the mdio bus works independently on ar7241 and later chips + * and we need to load mdio1 before gmac0, which can be done + * by adding a "simple-mfd" compatible to gmac node. The + * following code checks OF_POPULATED_BUS flag before populating + * to avoid duplicated population. + */ + if (!of_node_check_flag(np, OF_POPULATED_BUS)) { + err = of_platform_populate(np, NULL, NULL, &pdev->dev); + if (err) + return err; + } + + err = ag71xx_phy_connect(ag); + if (err) + return err; + + err = ag71xx_debugfs_init(ag); + if (err) + goto err_phy_disconnect; + + platform_set_drvdata(pdev, dev); + + err = register_netdev(dev); + if (err) { + dev_err(&pdev->dev, "unable to register net device\n"); + platform_set_drvdata(pdev, NULL); + ag71xx_debugfs_exit(ag); + goto err_phy_disconnect; + } + + pr_info("%s: Atheros AG71xx at 0x%08lx, irq %d, mode: %s\n", + dev->name, (unsigned long) ag->mac_base, dev->irq, + phy_modes(ag->phy_if_mode)); + + return 0; + +err_phy_disconnect: + ag71xx_phy_disconnect(ag); + return err; +} + +static int ag71xx_remove(struct platform_device *pdev) +{ + struct net_device *dev = platform_get_drvdata(pdev); + struct ag71xx *ag; + + if (!dev) + return 0; + + ag = netdev_priv(dev); + ag71xx_debugfs_exit(ag); + ag71xx_phy_disconnect(ag); + unregister_netdev(dev); + platform_set_drvdata(pdev, NULL); + return 0; +} + +static const struct of_device_id ag71xx_match[] = { + { .compatible = "qca,ar7100-eth" }, + { .compatible = "qca,ar7240-eth" }, + { .compatible = "qca,ar7241-eth" }, + { .compatible = "qca,ar7242-eth" }, + { .compatible = "qca,ar9130-eth" }, + { .compatible = "qca,ar9330-eth" }, + { .compatible = "qca,ar9340-eth" }, + { .compatible = "qca,qca9530-eth" }, + { .compatible = "qca,qca9550-eth" }, + { .compatible = "qca,qca9560-eth" }, + {} +}; + +static struct platform_driver ag71xx_driver = { + .probe = ag71xx_probe, + .remove = ag71xx_remove, + .driver = { + .name = AG71XX_DRV_NAME, + .of_match_table = ag71xx_match, + } +}; + +static int __init ag71xx_module_init(void) +{ + int ret; + + ret = ag71xx_debugfs_root_init(); + if (ret) + goto err_out; + + ret = platform_driver_register(&ag71xx_driver); + if (ret) + goto err_debugfs_exit; + + return 0; + +err_debugfs_exit: + ag71xx_debugfs_root_exit(); +err_out: + return ret; +} + +static void __exit ag71xx_module_exit(void) +{ + platform_driver_unregister(&ag71xx_driver); + ag71xx_debugfs_root_exit(); +} + +module_init(ag71xx_module_init); +module_exit(ag71xx_module_exit); + +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_AUTHOR("Imre Kaloz <kaloz@openwrt.org>"); +MODULE_AUTHOR("Felix Fietkau <nbd@nbd.name>"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" AG71XX_DRV_NAME); diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c new file mode 100644 index 0000000000..a58ee3346b --- /dev/null +++ b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_mdio.c @@ -0,0 +1,254 @@ +/* + * 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/clk.h> +#include <linux/of_mdio.h> +#include "ag71xx.h" + +#define AG71XX_MDIO_RETRY 1000 +#define AG71XX_MDIO_DELAY 5 + +static int bus_count; + +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); + + regmap_read(am->mii_regmap, AG71XX_REG_MII_IND, &busy); + if (!busy) + return 0; + + udelay(AG71XX_MDIO_DELAY); + } + + pr_err("%s: MDIO operation timed out\n", am->mii_bus->name); + + return -ETIMEDOUT; +} + +static int ag71xx_mdio_mii_read(struct mii_bus *bus, int addr, int reg) +{ + struct ag71xx_mdio *am = bus->priv; + int err; + int ret; + + err = ag71xx_mdio_wait_busy(am); + if (err) + return 0xffff; + + regmap_write(am->mii_regmap, AG71XX_REG_MII_CMD, MII_CMD_WRITE); + regmap_write(am->mii_regmap, AG71XX_REG_MII_ADDR, + ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff)); + regmap_write(am->mii_regmap, AG71XX_REG_MII_CMD, MII_CMD_READ); + + err = ag71xx_mdio_wait_busy(am); + if (err) + return 0xffff; + + regmap_read(am->mii_regmap, AG71XX_REG_MII_STATUS, &ret); + ret &= 0xffff; + regmap_write(am->mii_regmap, AG71XX_REG_MII_CMD, MII_CMD_WRITE); + + DBG("mii_read: addr=%04x, reg=%04x, value=%04x\n", addr, reg, ret); + + return ret; +} + +static int ag71xx_mdio_mii_write(struct mii_bus *bus, int addr, int reg, u16 val) +{ + struct ag71xx_mdio *am = bus->priv; + + DBG("mii_write: addr=%04x, reg=%04x, value=%04x\n", addr, reg, val); + + regmap_write(am->mii_regmap, AG71XX_REG_MII_ADDR, + ((addr & 0xff) << MII_ADDR_SHIFT) | (reg & 0xff)); + regmap_write(am->mii_regmap, AG71XX_REG_MII_CTRL, val); + + ag71xx_mdio_wait_busy(am); + + return 0; +} + +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 device_node *np, u32 *div) +{ + struct clk *ref_clk = of_clk_get(np, 0); + unsigned long ref_clock; + u32 mdio_clock; + const u32 *table; + int ndivs, i; + + if (IS_ERR(ref_clk)) + return -EINVAL; + + ref_clock = clk_get_rate(ref_clk); + clk_put(ref_clk); + + if(of_property_read_u32(np, "qca,mdio-max-frequency", &mdio_clock)) { + if (of_property_read_bool(np, "builtin-switch")) + mdio_clock = 5000000; + else + mdio_clock = 2000000; + } + + if (of_device_is_compatible(np, "qca,ar9330-mdio") || + of_device_is_compatible(np, "qca,ar9340-mdio")) { + table = ar933x_mdio_div_table; + ndivs = ARRAY_SIZE(ar933x_mdio_div_table); + } else if (of_device_is_compatible(np, "qca,ar7240-mdio")) { + 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; + } + } + + return -ENOENT; +} + +static int ag71xx_mdio_reset(struct mii_bus *bus) +{ + struct device_node *np = bus->dev.of_node; + struct ag71xx_mdio *am = bus->priv; + bool builtin_switch; + u32 t; + + builtin_switch = of_property_read_bool(np, "builtin-switch"); + + if (ag71xx_mdio_get_divider(np, &t)) { + if (of_device_is_compatible(np, "qca,ar9340-mdio")) + t = MII_CFG_CLK_DIV_58; + else if (builtin_switch) + t = MII_CFG_CLK_DIV_10; + else + t = MII_CFG_CLK_DIV_28; + } + + regmap_write(am->mii_regmap, AG71XX_REG_MII_CFG, t | MII_CFG_RESET); + udelay(100); + + regmap_write(am->mii_regmap, AG71XX_REG_MII_CFG, t); + udelay(100); + + return 0; +} + +static int ag71xx_mdio_probe(struct platform_device *pdev) +{ + struct device *amdev = &pdev->dev; + struct device_node *np = pdev->dev.of_node; + struct ag71xx_mdio *am; + struct mii_bus *mii_bus; + bool builtin_switch; + int i, err; + + am = devm_kzalloc(amdev, sizeof(*am), GFP_KERNEL); + if (!am) + return -ENOMEM; + + am->mii_regmap = syscon_regmap_lookup_by_phandle(np, "regmap"); + if (IS_ERR(am->mii_regmap)) + return PTR_ERR(am->mii_regmap); + + mii_bus = devm_mdiobus_alloc(amdev); + if (!mii_bus) + return -ENOMEM; + + am->mdio_reset = devm_reset_control_get_exclusive(amdev, "mdio"); + builtin_switch = of_property_read_bool(np, "builtin-switch"); + + mii_bus->name = "ag71xx_mdio"; + mii_bus->read = ag71xx_mdio_mii_read; + mii_bus->write = ag71xx_mdio_mii_write; + mii_bus->reset = ag71xx_mdio_reset; + mii_bus->priv = am; + mii_bus->parent = amdev; + snprintf(mii_bus->id, MII_BUS_ID_SIZE, "%s.%d", np->name, bus_count++); + + if (!builtin_switch && + of_property_read_u32(np, "phy-mask", &mii_bus->phy_mask)) + mii_bus->phy_mask = 0; + + for (i = 0; i < PHY_MAX_ADDR; i++) + mii_bus->irq[i] = PHY_POLL; + + if (!IS_ERR(am->mdio_reset)) { + reset_control_assert(am->mdio_reset); + msleep(100); + reset_control_deassert(am->mdio_reset); + msleep(200); + } + + err = of_mdiobus_register(mii_bus, np); + if (err) + return err; + + am->mii_bus = mii_bus; + platform_set_drvdata(pdev, am); + + return 0; +} + +static int ag71xx_mdio_remove(struct platform_device *pdev) +{ + struct ag71xx_mdio *am = platform_get_drvdata(pdev); + + mdiobus_unregister(am->mii_bus); + return 0; +} + +static const struct of_device_id ag71xx_mdio_match[] = { + { .compatible = "qca,ar7240-mdio" }, + { .compatible = "qca,ar9330-mdio" }, + { .compatible = "qca,ar9340-mdio" }, + { .compatible = "qca,ath79-mdio" }, + {} +}; + +static struct platform_driver ag71xx_mdio_driver = { + .probe = ag71xx_mdio_probe, + .remove = ag71xx_mdio_remove, + .driver = { + .name = "ag71xx-mdio", + .of_match_table = ag71xx_mdio_match, + } +}; + +module_platform_driver(ag71xx_mdio_driver); +MODULE_LICENSE("GPL"); diff --git a/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c new file mode 100644 index 0000000000..ac1af26860 --- /dev/null +++ b/target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_phy.c @@ -0,0 +1,92 @@ +/* + * 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/of_mdio.h> +#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); +} + +int ag71xx_phy_connect(struct ag71xx *ag) +{ + struct device_node *np = ag->pdev->dev.of_node; + struct device_node *phy_node; + int ret; + + if (of_phy_is_fixed_link(np)) { + ret = of_phy_register_fixed_link(np); + if (ret < 0) { + dev_err(&ag->pdev->dev, + "Failed to register fixed PHY link: %d\n", ret); + return ret; + } + + phy_node = of_node_get(np); + } else { + phy_node = of_parse_phandle(np, "phy-handle", 0); + } + + if (!phy_node) { + dev_err(&ag->pdev->dev, + "Could not find valid phy node\n"); + return -ENODEV; + } + + ag->phy_dev = of_phy_connect(ag->dev, phy_node, ag71xx_phy_link_adjust, + 0, ag->phy_if_mode); + + of_node_put(phy_node); + + if (!ag->phy_dev) { + dev_err(&ag->pdev->dev, + "Could not connect to PHY device. Deferring probe.\n"); + return -EPROBE_DEFER; + } + + dev_info(&ag->pdev->dev, "connected to PHY at %s [uid=%08x, driver=%s]\n", + phydev_name(ag->phy_dev), + ag->phy_dev->phy_id, ag->phy_dev->drv->name); + + return 0; +} + +void ag71xx_phy_disconnect(struct ag71xx *ag) +{ + phy_disconnect(ag->phy_dev); +} |