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 AR9342 - Ist der SoC der Loco XWs  AR8030 - PHY chip - - http://q…“

2016-06-05T18:58:55Z

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linux-ar71xx_generic/linux-3.10.49/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c

<pre>
AR9342 - Ist der SoC der Loco XWs

AR8030 - PHY chip - - http://qca.qualcomm.com/wp-content/uploads/2013/11/AR8030.pdf

AG71XX - ethernet driver

AR7240 SoC - Woi kommt das her?

Wo wird UP/DOWN von Ethernet behandelt?
ag71xx_main.c
- ag71xx_fast_reset()
- ag71xx_link_adjust()
hier wird auch fast_reset aufgerufen

ag71xx_phy.c - Was machen Funktionen?
- ag71xx_phy_link_adjust()
ruft auch ag71xx_link_adjust() auf
- ag71xx_phy_connect()

Implementierung:
in ag71xx_phy.c (detecktiere von UP zu DOWN)
+ if (status_change) {
+ pr_info("Debug: phy state change. ag->link=%d \n", ag->link);
+ pr_info("Debug: phy state change. phydev->link=%d \n ", phydev->link);
if ()
ag71xx_link_adjust(ag);
}

-------
und in ag71xx_main.c
+#include <linux/of_gpio.h>
+#include <linux/gpio.h>
+#define GPIO_SET 0x1804000C
+#define GPIO_CLEAR 0x18040010

void ag71xx_link_adjust()
...
if (!ag->link) {

ag71xx_hw_stop(ag);

netif_carrier_off(ag->dev);

-+if (netif_msg_link(ag)) {

pr_info("%s: link down\n", ag->dev->name);

+pr_info("AR803x PHY hangs? Reset it now! Interface maybe down but should not be in defect state ...\n");

+gpiod_set_value(GPIO_CLEAR, (1<<0));

+msleep(2);

+gpiod_set_value(GPIO_SET, (1<<0));

+msleep(2);

}

return;

}

Was muss implementiert werden? (allgemein)
https://dev.openwrt.org/ticket/19085#comment:14

Checken wie folgendes realisiert werden kann (Interface reset)
#define GPIO_SET 0x1804000C
#define GPIO_CLEAR 0x18040010

athr_reg_wr(GPIO_CLEAR,(1<<0));
mdelay(2);
athr_reg_wr(GPIO_SET,(1<<0));
mdelay(2);
----------
von http://permalink.gmane.org/gmane.linux.network/318765

+#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
+static void at803x_adjust_state(struct phy_device *phydev)
+{
+ struct at803x_priv *priv = phydev->priv;
+ if (phydev->drv->phy_id == ATH8030_PHY_ID) {
+ if (phydev->state == PHY_NOLINK) {
+ if (priv->gpiod_reset && !priv->phy_reset) {
+ struct at803x_context context;
+
+ at803x_context_save(phydev, &context);
+
+ gpiod_set_value(priv->gpiod_reset, 0);
+ msleep(1);
+ gpiod_set_value(priv->gpiod_reset, 1);
+ msleep(1);
+
+ at803x_context_restore(phydev, &context);
+
+ dev_dbg(&phydev->dev, "%s(): phy was reset\n",
+ __func__);
+ priv->phy_reset = true;
+ }
+ } else {
+ priv->phy_reset = false;
+ }
+ }

===============

enum phy_state {
PHY_DOWN=0,
PHY_STARTING,
PHY_READY,
PHY_PENDING,
PHY_UP,
PHY_AN,
PHY_RUNNING,
PHY_NOLINK,
PHY_FORCING,
PHY_CHANGELINK,
PHY_HALTED,
PHY_RESUMING
};

===========================
Log nach Anwendung des obigen Patches, zeigt leider zwei Dinge:
1. Schwenk von UP zu DOWN wurde nicht erkannt.
2. Einfach so GPIO zu schreiben, bringt Kernelfehler (naja, war fast zu erwarten. Aber es war einen Versuch wert)

Log nach dem normalen Booten:
root@AP-2-30:~# dmesg | grep -i phy
[ 0.000000] Determined physical RAM map:
[ 0.600000] libphy: ag71xx_mdio: probed
[ 1.150000] ag71xx ag71xx.0: connected to PHY at ag71xx-mdio.0:01 [uid=004dd023, driver=Generic PHY]
[ 6.170000] Debug: phy state change. ag->link=1 (Opennet 4)
[ 6.170000] Debug: phy state change. phydev->link=1 (Opennet 4)
[ 21.730000] AR803x PHY hangs? Reset it now! Interface maybe down but should not be in defect state ...(Opennet Hack4)
[ 21.730000] [<800b4bfc>] ag71xx_phy_stop+0x78/0x9c
[ 21.990000] [<800b4bfc>] ag71xx_phy_stop+0x78/0x9c
[ 25.570000] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[ 25.650000] ieee80211 phy0: Atheros AR9340 Rev:0 mem=0xb8100000, irq=47
[ 43.430000] Debug: phy state change. ag->link=1 (Opennet 4)
[ 43.430000] Debug: phy state change. phydev->link=1 (Opennet 4)

[69453.360000] Debug: phy state change. ag->link=1 (Opennet 4)
[69453.360000] Debug: phy state change. phydev->link=1 (Opennet 4)
[69453.360000]
[69453.360000] eth0: link up (10Mbps/Half duplex)
[69455.370000] Debug: phy state change. ag->link=0 (Opennet 4)
[69455.370000] Debug: phy state change. phydev->link=0 (Opennet 4)
[69455.370000]
[69455.370000] eth0: link down
[69455.370000] AR803x PHY hangs? Reset it now! Interface maybe down but should not be in defect state ...(Opennet Hack4)
[69455.370000] ------------[ cut here ]------------
[69455.370000] WARNING: at drivers/gpio/gpiolib.c:126 gpio_to_desc+0x2c/0x54()
[69455.370000] invalid GPIO 402915344
[69455.370000] Modules linked in: ath9k ath9k_common pppoe ppp_async iptable_nat ath9k_hw ath pptp pppox ppp_mppe ppp_generic nf_nat_ipv4 nf_conntrack_ipv4 mac80211 ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_id xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT slhc nf_nat_irc nf_nat_ftp nf_nat nf_defrag_ipv4 nf_conntrack_irc nf_conntrack_ftp iptable_raw iptable_mangle iptable_filter ipt_REJECT ip_tables crc_ccitt compat ip6t_REJECT ip6table_raw ip6table_mangle ip6table_filter ip6_tables x_tables nf_conntrack_ipv6 nf_conntrack nf_defrag_ipv6 ip_gre gre ip_tunnel tun ipv6 sha1_generic ecb arc4 crypto_blkcipher crypto_hash
[69455.370000] CPU: 0 PID: 232 Comm: kworker/0:2 Tainted: G W 3.10.49 #4
[69455.370000] Workqueue: events phy_state_machine
[69455.370000] Stack : 839da380 802d4c44 80148110 0000007e 802e4278 83926c00 83926d74 8030f8b0
[69455.370000] 00000008 8027b720 000000e8 801e38ac 83904a08 83926c00 802e2250 83aa7ce4
[69455.370000] 83aa7ce4 8027b720 00000003 801e33d0 802e4278 00000000 00000005 802144b0
[69455.370000] 00000000 00000000 00000000 00000000 00000000 00000000 6576656e 74730000
[69455.370000] 00000000 00000000 00000000 00000000 83816a00 81082300 801da094 83aa7c90
[69455.370000] ...
[69455.370000] Call Trace:
[69455.370000] [<8022441c>] show_stack+0x48/0x70
[69455.370000] [<8028aca4>] warn_slowpath_common+0x78/0xa8
[69455.370000] [<8028ad00>] warn_slowpath_fmt+0x2c/0x38
[69455.370000] [<80148110>] gpio_to_desc+0x2c/0x54
[69455.370000] [<8008fef8>] __gpio_set_value+0x1c/0xe0
[69455.370000] [<800b3b84>] ag71xx_link_adjust+0x84/0x39c
[69455.370000] [<800b4b10>] ag71xx_phy_link_adjust+0xa0/0xc8
[69455.370000] [<801da334>] phy_state_machine+0x2a0/0x484
[69455.370000] [<801ebe5c>] process_one_work+0x228/0x364
[69455.370000] [<8028c054>] worker_thread+0x234/0x388
[69455.370000] [<8018c7a4>] kthread+0xb0/0xb8
[69455.370000] [<80060878>] ret_from_kernel_thread+0x14/0x1c
[69455.370000]
[69455.370000] ---[ end trace 9841a412d51fe0b2 ]---
[69455.590000] ------------[ cut here ]------------
[69455.590000] WARNING: at drivers/gpio/gpiolib.c:126 gpio_to_desc+0x2c/0x54()
[69455.600000] invalid GPIO 402915340
[69455.600000] Modules linked in: ath9k ath9k_common pppoe ppp_async iptable_nat ath9k_hw ath pptp pppox ppp_mppe ppp_generic nf_nat_ipv4 nf_conntrack_ipv4 mac80211 ipt_MASQUERADE cfg80211 xt_time xt_tcpudp xt_state xt_nat xt_multiport xt_mark xt_mac xt_limit xt_id xt_conntrack xt_comment xt_TCPMSS xt_REDIRECT xt_LOG xt_CT slhc nf_nat_irc nf_nat_ftp nf_nat nf_defrag_ipv4 nf_conntrack_irc nf_conntrack_ftp iptable_raw iptable_mangle iptable_filter ipt_REJECT ip_tables crc_ccitt compat ip6t_REJECT ip6table_raw ip6table_mangle ip6table_filter ip6_tables x_tables nf_conntrack_ipv6 nf_conntrack nf_defrag_ipv6 ip_gre gre ip_tunnel tun ipv6 sha1_generic ecb arc4 crypto_blkcipher crypto_hash
[69455.660000] CPU: 0 PID: 232 Comm: kworker/0:2 Tainted: G W 3.10.49 #4
[69455.670000] Workqueue: events phy_state_machine/home/leo/trunk/5-package-repo-change/on_firmware/openwrt/build_dir/targ~ibc-0.9.33.2/linux-ar71xx_generic/linux-3.18.11/arch/mips/ath79/common.c
[69455.680000] Stack : 839da380 802d4c44 80148110 0000007e 802e4278 83926c00 83926d74 8030f8b0
[69455.680000] 00000008 8027b720 000000e8 801e38ac 83904a08 83926c00 802e2250 83aa7ce4
[69455.680000] 83aa7ce4 8027b720 00000003 801e33d0 802e4278 00000000 00000005 802144b0
[69455.680000] 00000000 00000000 00000000 00000000 00000000 00000000 6576656e 74730000
[69455.680000] 00000000 00000000 00000000 00000000 83816a00 81082300 801da094 83aa7c90
[69455.680000] ...
[69455.710000] Call Trace:
[69455.720000] [<8022441c>] show_stack+0x48/0x70
[69455.720000] [<8028aca4>] warn_slowpath_common+0x78/0xa8
[69455.730000] [<8028ad00>] warn_slowpath_fmt+0x2c/0x38
[69455.730000] [<80148110>] gpio_to_desc+0x2c/0x54
[69455.730000] [<8008fef8>] __gpio_set_value+0x1c/0xe0
[69455.740000] [<800b3b98>] ag71xx_link_adjust+0x98/0x39c
[69455.750000] [<800b4b10>] ag71xx_phy_link_adjust+0xa0/0xc8
[69455.750000] [<801da334>] phy_state_machine+0x2a0/0x484
[69455.760000] [<801ebe5c>] process_one_work+0x228/0x364
[69455.760000] [<8028c054>] worker_thread+0x234/0x388
[69455.770000] [<8018c7a4>] kthread+0xb0/0xb8
[69455.770000] [<80060878>] ret_from_kernel_thread+0x14/0x1c
[69455.780000]
[69455.780000] ---[ end trace 9841a412d51fe0b3 ]---
[69455.790000] br-lan: port 1(eth0) entered disabled state
[71876.510000] br-lan: port 1(eth0) entered disabled state
[71885.020000] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

=============================

Versuch: Reset bei jedem up/down machen oder zumindest bei jeden Reset des Interfaces.

Fragen: In welche Situationen wird interface Reset gemacht. Das durch Debug Meldungen in Funktionen ermitteln.

Frage: In welche Funktion den Reset machen?
- evtl. in /home/leo/trunk/5-package-repo-change/on_firmware/openwrt/build_dir/targ~ibc-0.9.33.2/linux-ar71xx_generic/linux-3.18.11/arch/mips/ath79/common.c

void ath79_device_reset_clear(u32 mask)

diese Funktion wird in der ag71xx...main.c - ag71xx_hw_init() aufgerufen.

In der ag71xx_hw_init() gibt es auch ein Reset-Bit (reset_mask).

gpio = devm_gpiod_get_index(dev, name, index);
res = gpiod_direction_output(gpio, !value);
devm_gpiod_put(dev, gpio);
gpiod_set_value_cansleep(gpio, value);

einige Beschreibungen zu GPIO : linux-ar71xx_generic/linux-3.18.11/Documentation/gpio/consumer.txt

===============================

ag71xx_phy.c
- ag71xx_phy_link_adjust()
-- vor phydev->link
int id1 = phy_read( phydev, 2 )
int id2 = phy_read( phydev, 3 )
printk ("hack id=%04x %04x", id1, id2); /* sollte "004d d023" sein, bis der bug auftritt */

======================
ag71xx_phy.c
- ag71xx_phy_link_adjust()

spin_lock_irqsave(&ag->lock, flags);

int id1 = phy_read( phydev, 2 );
int id2 = phy_read( phydev, 3 );
printk("Opennet Hack09: id=%04x %04x",id1, id2); /* sollte "004d d023" sein, bis der bug auftritt */

if (phydev->link) {

- ag71xx_main.c

<------><------>pr_info("%s: link up (%sMbps/%s duplex) OpennetHack09\n",

========================
leo@minato:~/trunk/eth0-bug-trunk/on_firmware/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.18.14/drivers/net/ethernet/atheros/ag71xx$ cp ag71xx_phy.c.patched ~

</pre>

Benutzer:Leo/eth0-bug-analyse - Versionsgeschichte

Leo: Die Seite wurde neu angelegt: „ linux-ar71xx_generic/linux-3.10.49/drivers/net/ethernet/atheros/ag71xx/ag71xx_main.c
AR9342 - Ist der SoC der Loco XWs AR8030 - PHY chip - - http://q…“