From e94bc75237d45acb28fa2e224fd322bcdafd0c0d Mon Sep 17 00:00:00 2001 From: Markus Pargmann Date: Mon, 29 Sep 2014 08:53:17 +0200 Subject: [PATCH 4/6] net: cpsw: Add am33xx MACID readout BugLink: http://bugs.launchpad.net/bugs/1452628 This patch adds a function to get the MACIDs from the am33xx SoC control module registers which hold unique vendor MACIDs. This is only used if of_get_mac_address() fails to get a valid mac address. Signed-off-by: Markus Pargmann Reviewed-by: Wolfram Sang Tested-by: Steven Rostedt Acked-by: Tony Lindgren Signed-off-by: David S. Miller (cherry-picked from 0ba517b18aac0ed747b0f0716ca87cedaa8e5491 upstream) Signed-off-by: Paolo Pisati --- Documentation/devicetree/bindings/net/cpsw.txt | 4 +++ drivers/net/ethernet/ti/Kconfig | 2 ++ drivers/net/ethernet/ti/cpsw.c | 42 +++++++++++++++++++++++++- 3 files changed, 47 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/net/cpsw.txt b/Documentation/devicetree/bindings/net/cpsw.txt index c39f077..a5cdd62 100644 --- a/Documentation/devicetree/bindings/net/cpsw.txt +++ b/Documentation/devicetree/bindings/net/cpsw.txt @@ -24,6 +24,8 @@ Optional properties: - ti,hwmods : Must be "cpgmac0" - no_bd_ram : Must be 0 or 1 - dual_emac : Specifies Switch to act as Dual EMAC +- syscon : Phandle to the system control device node, which is + the control module device of the am33x Slave Properties: Required properties: @@ -58,6 +60,7 @@ Examples: active_slave = <0>; cpts_clock_mult = <0x80000000>; cpts_clock_shift = <29>; + syscon = <&cm>; cpsw_emac0: slave@0 { phy_id = <&davinci_mdio>, <0>; phy-mode = "rgmii-txid"; @@ -86,6 +89,7 @@ Examples: active_slave = <0>; cpts_clock_mult = <0x80000000>; cpts_clock_shift = <29>; + syscon = <&cm>; cpsw_emac0: slave@0 { phy_id = <&davinci_mdio>, <0>; phy-mode = "rgmii-txid"; diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig index 53150c2..afaf019 100644 --- a/drivers/net/ethernet/ti/Kconfig +++ b/drivers/net/ethernet/ti/Kconfig @@ -62,6 +62,8 @@ config TI_CPSW select TI_DAVINCI_CPDMA select TI_DAVINCI_MDIO select TI_CPSW_PHY_SEL + select MFD_SYSCON + select REGMAP ---help--- This driver supports TI's CPSW Ethernet Switch. diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c index 024c2b9..ff8f6f1 100644 --- a/drivers/net/ethernet/ti/cpsw.c +++ b/drivers/net/ethernet/ti/cpsw.c @@ -33,6 +33,8 @@ #include #include #include +#include +#include #include @@ -1719,6 +1721,36 @@ static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv, slave->port_vlan = data->dual_emac_res_vlan; } +#define AM33XX_CTRL_MAC_LO_REG(id) (0x630 + 0x8 * id) +#define AM33XX_CTRL_MAC_HI_REG(id) (0x630 + 0x8 * id + 0x4) + +static int cpsw_am33xx_cm_get_macid(struct device *dev, int slave, + u8 *mac_addr) +{ + u32 macid_lo; + u32 macid_hi; + struct regmap *syscon; + + syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon"); + if (IS_ERR(syscon)) { + if (PTR_ERR(syscon) == -ENODEV) + return 0; + return PTR_ERR(syscon); + } + + regmap_read(syscon, AM33XX_CTRL_MAC_LO_REG(slave), &macid_lo); + regmap_read(syscon, AM33XX_CTRL_MAC_HI_REG(slave), &macid_hi); + + mac_addr[5] = (macid_lo >> 8) & 0xff; + mac_addr[4] = macid_lo & 0xff; + mac_addr[3] = (macid_hi >> 24) & 0xff; + mac_addr[2] = (macid_hi >> 16) & 0xff; + mac_addr[1] = (macid_hi >> 8) & 0xff; + mac_addr[0] = macid_hi & 0xff; + + return 0; +} + static int cpsw_probe_dt(struct cpsw_platform_data *data, struct platform_device *pdev) { @@ -1826,8 +1858,16 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data, PHY_ID_FMT, mdio->name, phyid); mac_addr = of_get_mac_address(slave_node); - if (mac_addr) + if (mac_addr) { memcpy(slave_data->mac_addr, mac_addr, ETH_ALEN); + } else { + if (of_machine_is_compatible("ti,am33xx")) { + ret = cpsw_am33xx_cm_get_macid(&pdev->dev, i, + slave_data->mac_addr); + if (ret) + return ret; + } + } slave_data->phy_if = of_get_phy_mode(slave_node); -- 2.1.0