From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nelson Chang Subject: [PATCH net-next 1/3] net: ethernet: mediatek: get the chip id by ETHDMASYS registers Date: Mon, 3 Oct 2016 15:18:49 +0800 Message-ID: <1475479131-19822-2-git-send-email-nelson.chang@mediatek.com> References: <1475479131-19822-1-git-send-email-nelson.chang@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1475479131-19822-1-git-send-email-nelson.chang@mediatek.com> Sender: netdev-owner@vger.kernel.org To: john@phrozen.org, davem@davemloft.net Cc: nbd@openwrt.org, netdev@vger.kernel.org, linux-mediatek@lists.infradead.org, nelsonch.tw@gmail.com, Nelson Chang List-Id: linux-mediatek@lists.infradead.org The driver gets the chip id by ETHSYS_CHIPID0_3/ETHSYS_CHIPID4_7 registers in mtk_probe(). Signed-off-by: Nelson Chang --- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 27 +++++++++++++++++++++++++++ drivers/net/ethernet/mediatek/mtk_eth_soc.h | 5 +++++ 2 files changed, 32 insertions(+) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c index ad4ab97..a3e4ae6 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c @@ -2323,6 +2323,27 @@ free_netdev: return err; } +static u32 mtk_get_chip_id(struct mtk_eth *eth) +{ + u32 val[2], id[4]; + u32 chip_id; + + 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]; + + dev_info(eth->dev, "chip id = %d\n", chip_id); + + return chip_id; +} + static int mtk_probe(struct platform_device *pdev) { struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -2388,6 +2409,12 @@ static int mtk_probe(struct platform_device *pdev) if (err) return err; + eth->chip_id = mtk_get_chip_id(eth); + if (!eth->chip_id) { + dev_err(&pdev->dev, "failed to get chip id\n"); + return -ENODEV; + } + for_each_child_of_node(pdev->dev.of_node, mac_np) { if (!of_device_is_compatible(mac_np, "mediatek,eth-mac")) diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h index 3003195..a5b422b 100644 --- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h +++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h @@ -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; -- 1.9.1