From: Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>
To: netdev@vger.kernel.org
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Subject: [patch v2 2/2] Try to fix mvneta when compiled as module
Date: Mon, 29 Jul 2013 21:56:48 +0200 [thread overview]
Message-ID: <20130729195711.893401612@rtp-net.org> (raw)
In-Reply-To: 20130729195646.433524957@rtp-net.org
[-- Attachment #1: mvneta-init-fix.patch --]
[-- Type: text/plain, Size: 2915 bytes --]
When the mvneta driver is compiled as module, the clock is disabled before
it's loading. This will reset the registers values and all configuration
made by the bootloader.
This patch sets the "sgmii serdes configuration" register to a magical value
found in:
https://github.com/yellowback/ubuntu-precise-armadaxp/blob/master/arch/arm/mach-armadaxp/armada_xp_family/ctrlEnv/mvCtrlEnvLib.c
With this change, the interrupts are working/generated and ethernet is
working.
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Index: linux-next/drivers/net/ethernet/marvell/mvneta.c
===================================================================
--- linux-next.orig/drivers/net/ethernet/marvell/mvneta.c 2013-07-29 21:48:20.673275215 +0200
+++ linux-next/drivers/net/ethernet/marvell/mvneta.c 2013-07-29 21:53:03.021262793 +0200
@@ -88,6 +88,8 @@
#define MVNETA_TX_IN_PRGRS BIT(1)
#define MVNETA_TX_FIFO_EMPTY BIT(8)
#define MVNETA_RX_MIN_FRAME_SIZE 0x247c
+#define MVNETA_SGMII_SERDES_CFG 0x24A0
+#define MVNETA_SGMII_SERDES_PROTO 0x0cc7
#define MVNETA_TYPE_PRIO 0x24bc
#define MVNETA_FORCE_UNI BIT(21)
#define MVNETA_TXQ_CMD_1 0x24e4
@@ -655,6 +657,8 @@ static void mvneta_port_sgmii_config(str
val = mvreg_read(pp, MVNETA_GMAC_CTRL_2);
val |= MVNETA_GMAC2_PSC_ENABLE;
mvreg_write(pp, MVNETA_GMAC_CTRL_2, val);
+
+ mvreg_write(pp, MVNETA_SGMII_SERDES_CFG, MVNETA_SGMII_SERDES_PROTO);
}
/* Start the Ethernet port RX and TX activity */
@@ -2735,11 +2739,17 @@ static int mvneta_probe(struct platform_
pp->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(pp->clk)) {
err = PTR_ERR(pp->clk);
- goto err_unmap;
+ goto err_free_irq;
}
clk_prepare_enable(pp->clk);
+ pp->base = of_iomap(dn, 0);
+ if (pp->base == NULL) {
+ err = -ENOMEM;
+ goto err_clk;
+ }
+
dt_mac_addr = of_get_mac_address(dn);
if (dt_mac_addr && is_valid_ether_addr(dt_mac_addr)) {
mac_from = "device tree";
@@ -2755,12 +2765,6 @@ static int mvneta_probe(struct platform_
}
}
- pp->base = of_iomap(dn, 0);
- if (pp->base == NULL) {
- err = -ENOMEM;
- goto err_free_irq;
- }
-
pp->tx_done_timer.data = (unsigned long)dev;
pp->tx_done_timer.function = mvneta_tx_done_timer_callback;
init_timer(&pp->tx_done_timer);
@@ -2775,7 +2779,7 @@ static int mvneta_probe(struct platform_
err = mvneta_init(pp, phy_addr);
if (err < 0) {
dev_err(&pdev->dev, "can't init eth hal\n");
- goto err_clk;
+ goto err_unmap;
}
mvneta_port_power_up(pp, phy_mode);
@@ -2805,10 +2809,10 @@ static int mvneta_probe(struct platform_
err_deinit:
mvneta_deinit(pp);
-err_clk:
- clk_disable_unprepare(pp->clk);
err_unmap:
iounmap(pp->base);
+err_clk:
+ clk_disable_unprepare(pp->clk);
err_free_irq:
irq_dispose_mapping(dev->irq);
err_free_netdev:
next prev parent reply other threads:[~2013-07-29 20:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-29 19:56 [patch v2 0/2] Fix system hang when loading mvneta module - take 2 Arnaud Patard
2013-07-29 19:56 ` [patch v2 1/2] Fix hang when loading the mvneta driver Arnaud Patard
2013-07-29 19:56 ` Arnaud Patard [this message]
2013-07-31 2:32 ` [patch v2 0/2] Fix system hang when loading mvneta module - take 2 David Miller
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130729195711.893401612@rtp-net.org \
--to=arnaud.patard@rtp-net.org \
--cc=netdev@vger.kernel.org \
--cc=thomas.petazzoni@free-electrons.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).