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net: ethernet: mediatek: get the chip id by ETHDMASYS registers 

The driver gets the chip id by ETHSYS_CHIPID0_3/ETHSYS_CHIPID4_7 registers
in mtk_probe().

Signed-off-by: Nelson Chang <nelson.chang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Nelson Chang 2016-10-06 19:44:01 +08:00 committed by David S. Miller
parent 0d818c2889
commit b95b6d99ce
2 changed files with 34 additions and 0 deletions
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29
drivers/net/ethernet/mediatek/mtk_eth_soc.c
View File

@ -2323,6 +2323,31 @@ free_netdev:
return err;
}
static int mtk_get_chip_id(struct mtk_eth *eth, u32 *chip_id)
{
u32 val[2], id[4];
regmap_read(eth->ethsys, ETHSYS_CHIPID0_3, &val[0]);
regmap_read(eth->ethsys, ETHSYS_CHIPID4_7, &val[1]);
id[3] = ((val[0] >> 16) & 0xff) - '0';
id[2] = ((val[0] >> 24) & 0xff) - '0';
id[1] = (val[1] & 0xff) - '0';
id[0] = ((val[1] >> 8) & 0xff) - '0';
*chip_id = (id[3] * 1000) + (id[2] * 100) +
(id[1] * 10) + id[0];
if (!(*chip_id)) {
dev_err(eth->dev, "failed to get chip id\n");
return -ENODEV;
}
dev_info(eth->dev, "chip id = %d\n", *chip_id);
return 0;
}
static int mtk_probe(struct platform_device *pdev)
{
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@ -2388,6 +2413,10 @@ static int mtk_probe(struct platform_device *pdev)
if (err)
return err;
err = mtk_get_chip_id(eth, &eth->chip_id);
if (err)
return err;
for_each_child_of_node(pdev->dev.of_node, mac_np) {
if (!of_device_is_compatible(mac_np,
"mediatek,eth-mac"))

5
drivers/net/ethernet/mediatek/mtk_eth_soc.h
View File

@ -342,6 +342,10 @@
#define GPIO_BIAS_CTRL 0xed0
#define GPIO_DRV_SEL10 0xf00
/* ethernet subsystem chip id register */
#define ETHSYS_CHIPID0_3 0x0
#define ETHSYS_CHIPID4_7 0x4
/* ethernet subsystem config register */
#define ETHSYS_SYSCFG0 0x14
#define SYSCFG0_GE_MASK 0x3
@ -534,6 +538,7 @@ struct mtk_eth {
unsigned long sysclk;
struct regmap *ethsys;
struct regmap *pctl;
u32 chip_id;
bool hwlro;
atomic_t dma_refcnt;
struct mtk_tx_ring tx_ring;