diff options
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c | 157 |
1 files changed, 141 insertions, 16 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c index f7dc8458cde8..e888c8a9c830 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c @@ -27,6 +27,8 @@ #include <linux/stmmac.h> #include <linux/of_mdio.h> #include <linux/module.h> +#include <linux/sys_soc.h> +#include <linux/bitfield.h> #include "stmmac_platform.h" @@ -64,6 +66,17 @@ #define NSS_COMMON_CLK_DIV_SGMII_100 4 #define NSS_COMMON_CLK_DIV_SGMII_10 49 +#define QSGMII_PCS_ALL_CH_CTL 0x80 +#define QSGMII_PCS_CH_SPEED_FORCE BIT(1) +#define QSGMII_PCS_CH_SPEED_10 0x0 +#define QSGMII_PCS_CH_SPEED_100 BIT(2) +#define QSGMII_PCS_CH_SPEED_1000 BIT(3) +#define QSGMII_PCS_CH_SPEED_MASK (QSGMII_PCS_CH_SPEED_FORCE | \ + QSGMII_PCS_CH_SPEED_10 | \ + QSGMII_PCS_CH_SPEED_100 | \ + QSGMII_PCS_CH_SPEED_1000) +#define QSGMII_PCS_CH_SPEED_SHIFT(x) ((x) * 4) + #define QSGMII_PCS_CAL_LCKDT_CTL 0x120 #define QSGMII_PCS_CAL_LCKDT_CTL_RST BIT(19) @@ -75,11 +88,20 @@ #define QSGMII_PHY_RX_SIGNAL_DETECT_EN BIT(2) #define QSGMII_PHY_TX_DRIVER_EN BIT(3) #define QSGMII_PHY_QSGMII_EN BIT(7) -#define QSGMII_PHY_PHASE_LOOP_GAIN_OFFSET 12 -#define QSGMII_PHY_RX_DC_BIAS_OFFSET 18 -#define QSGMII_PHY_RX_INPUT_EQU_OFFSET 20 -#define QSGMII_PHY_CDR_PI_SLEW_OFFSET 22 -#define QSGMII_PHY_TX_DRV_AMP_OFFSET 28 +#define QSGMII_PHY_DEEMPHASIS_LVL_MASK GENMASK(11, 10) +#define QSGMII_PHY_DEEMPHASIS_LVL(x) FIELD_PREP(QSGMII_PHY_DEEMPHASIS_LVL_MASK, (x)) +#define QSGMII_PHY_PHASE_LOOP_GAIN_MASK GENMASK(14, 12) +#define QSGMII_PHY_PHASE_LOOP_GAIN(x) FIELD_PREP(QSGMII_PHY_PHASE_LOOP_GAIN_MASK, (x)) +#define QSGMII_PHY_RX_DC_BIAS_MASK GENMASK(19, 18) +#define QSGMII_PHY_RX_DC_BIAS(x) FIELD_PREP(QSGMII_PHY_RX_DC_BIAS_MASK, (x)) +#define QSGMII_PHY_RX_INPUT_EQU_MASK GENMASK(21, 20) +#define QSGMII_PHY_RX_INPUT_EQU(x) FIELD_PREP(QSGMII_PHY_RX_INPUT_EQU_MASK, (x)) +#define QSGMII_PHY_CDR_PI_SLEW_MASK GENMASK(23, 22) +#define QSGMII_PHY_CDR_PI_SLEW(x) FIELD_PREP(QSGMII_PHY_CDR_PI_SLEW_MASK, (x)) +#define QSGMII_PHY_TX_SLEW_MASK GENMASK(27, 26) +#define QSGMII_PHY_TX_SLEW(x) FIELD_PREP(QSGMII_PHY_TX_SLEW_MASK, (x)) +#define QSGMII_PHY_TX_DRV_AMP_MASK GENMASK(31, 28) +#define QSGMII_PHY_TX_DRV_AMP(x) FIELD_PREP(QSGMII_PHY_TX_DRV_AMP_MASK, (x)) struct ipq806x_gmac { struct platform_device *pdev; @@ -242,6 +264,113 @@ static void ipq806x_gmac_fix_mac_speed(void *priv, unsigned int speed) ipq806x_gmac_set_speed(gmac, speed); } +static int +ipq806x_gmac_configure_qsgmii_pcs_speed(struct ipq806x_gmac *gmac) +{ + struct platform_device *pdev = gmac->pdev; + struct device *dev = &pdev->dev; + struct device_node *dn; + int link_speed; + int val = 0; + int ret; + + /* Some bootloader may apply wrong configuration and cause + * not functioning port. If fixed link is not set, + * reset the force speed bit. + */ + if (!of_phy_is_fixed_link(pdev->dev.of_node)) + goto write; + + dn = of_get_child_by_name(pdev->dev.of_node, "fixed-link"); + ret = of_property_read_u32(dn, "speed", &link_speed); + of_node_put(dn); + if (ret) { + dev_err(dev, "found fixed-link node with no speed"); + return ret; + } + + val = QSGMII_PCS_CH_SPEED_FORCE; + + switch (link_speed) { + case SPEED_1000: + val |= QSGMII_PCS_CH_SPEED_1000; + break; + case SPEED_100: + val |= QSGMII_PCS_CH_SPEED_100; + break; + case SPEED_10: + val |= QSGMII_PCS_CH_SPEED_10; + break; + } + +write: + regmap_update_bits(gmac->qsgmii_csr, QSGMII_PCS_ALL_CH_CTL, + QSGMII_PCS_CH_SPEED_MASK << + QSGMII_PCS_CH_SPEED_SHIFT(gmac->id), + val << + QSGMII_PCS_CH_SPEED_SHIFT(gmac->id)); + + return 0; +} + +static const struct soc_device_attribute ipq806x_gmac_soc_v1[] = { + { + .revision = "1.*", + }, + { + /* sentinel */ + } +}; + +static int +ipq806x_gmac_configure_qsgmii_params(struct ipq806x_gmac *gmac) +{ + struct platform_device *pdev = gmac->pdev; + const struct soc_device_attribute *soc; + struct device *dev = &pdev->dev; + u32 qsgmii_param; + + switch (gmac->id) { + case 1: + soc = soc_device_match(ipq806x_gmac_soc_v1); + + if (soc) + qsgmii_param = QSGMII_PHY_TX_DRV_AMP(0xc) | + QSGMII_PHY_TX_SLEW(0x2) | + QSGMII_PHY_DEEMPHASIS_LVL(0x2); + else + qsgmii_param = QSGMII_PHY_TX_DRV_AMP(0xd) | + QSGMII_PHY_TX_SLEW(0x0) | + QSGMII_PHY_DEEMPHASIS_LVL(0x0); + + qsgmii_param |= QSGMII_PHY_RX_DC_BIAS(0x2); + break; + case 2: + case 3: + qsgmii_param = QSGMII_PHY_RX_DC_BIAS(0x3) | + QSGMII_PHY_TX_DRV_AMP(0xc); + break; + default: /* gmac 0 can't be set in SGMII mode */ + dev_err(dev, "gmac id %d can't be in SGMII mode", gmac->id); + return -EINVAL; + } + + /* Common params across all gmac id */ + qsgmii_param |= QSGMII_PHY_CDR_EN | + QSGMII_PHY_RX_FRONT_EN | + QSGMII_PHY_RX_SIGNAL_DETECT_EN | + QSGMII_PHY_TX_DRIVER_EN | + QSGMII_PHY_QSGMII_EN | + QSGMII_PHY_PHASE_LOOP_GAIN(0x4) | + QSGMII_PHY_RX_INPUT_EQU(0x1) | + QSGMII_PHY_CDR_PI_SLEW(0x2); + + regmap_write(gmac->qsgmii_csr, QSGMII_PHY_SGMII_CTL(gmac->id), + qsgmii_param); + + return 0; +} + static int ipq806x_gmac_probe(struct platform_device *pdev) { struct plat_stmmacenet_data *plat_dat; @@ -328,17 +457,13 @@ static int ipq806x_gmac_probe(struct platform_device *pdev) regmap_write(gmac->nss_common, NSS_COMMON_CLK_GATE, val); if (gmac->phy_mode == PHY_INTERFACE_MODE_SGMII) { - regmap_write(gmac->qsgmii_csr, QSGMII_PHY_SGMII_CTL(gmac->id), - QSGMII_PHY_CDR_EN | - QSGMII_PHY_RX_FRONT_EN | - QSGMII_PHY_RX_SIGNAL_DETECT_EN | - QSGMII_PHY_TX_DRIVER_EN | - QSGMII_PHY_QSGMII_EN | - 0x4ul << QSGMII_PHY_PHASE_LOOP_GAIN_OFFSET | - 0x3ul << QSGMII_PHY_RX_DC_BIAS_OFFSET | - 0x1ul << QSGMII_PHY_RX_INPUT_EQU_OFFSET | - 0x2ul << QSGMII_PHY_CDR_PI_SLEW_OFFSET | - 0xCul << QSGMII_PHY_TX_DRV_AMP_OFFSET); + err = ipq806x_gmac_configure_qsgmii_params(gmac); + if (err) + goto err_remove_config_dt; + + err = ipq806x_gmac_configure_qsgmii_pcs_speed(gmac); + if (err) + goto err_remove_config_dt; } plat_dat->has_gmac = true; |