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mvneta: Try to fix mvneta when compiled as module 

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaud Patard \(Rtp\) 2013-07-29 21:56:48 +02:00 committed by David S. Miller
parent aded09555b
commit 5445eaf309
1 changed files with 14 additions and 10 deletions
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24
drivers/net/ethernet/marvell/mvneta.c
View File

@ -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(struct mvneta_port *pp)
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_device *pdev)
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_device *pdev)
}
}
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_device *pdev)
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_device *pdev)
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: