target/linux/ath79/files/drivers/net/ethernet/atheros/ag71xx/ag71xx_gmac.c

   1 /*
   2  *  Atheros AR71xx built-in ethernet mac driver
   3  *
   4  *  This program is free software; you can redistribute it and/or modify it
   5  *  under the terms of the GNU General Public License version 2 as published
   6  *  by the Free Software Foundation.
   7  */
   8
   9 #include <linux/sizes.h>
  10 #include <linux/of_address.h>
  11 #include "ag71xx.h"
  12
  13 static void ag71xx_of_set(struct device_node *np, const char *prop,
  14                           u32 *reg, u32 shift, u32 mask)
  15 {
  16         u32 val;
  17
  18         if (of_property_read_u32(np, prop, &val))
  19                 return;
  20
  21         *reg &= ~(mask << shift);
  22         *reg |= ((val & mask) << shift);
  23 }
  24
  25 static void ag71xx_of_bit(struct device_node *np, const char *prop,
  26                           u32 *reg, u32 mask)
  27 {
  28         u32 val;
  29
  30         if (of_property_read_u32(np, prop, &val))
  31                 return;
  32
  33         if (val)
  34                 *reg |= mask;
  35         else
  36                 *reg &= ~mask;
  37 }
  38
  39 static void ag71xx_setup_gmac_933x(struct device_node *np, void __iomem *base)
  40 {
  41         u32 val = __raw_readl(base + AR933X_GMAC_REG_ETH_CFG);
  42
  43         ag71xx_of_bit(np, "switch-phy-swap", &val, AR933X_ETH_CFG_SW_PHY_SWAP);
  44         ag71xx_of_bit(np, "switch-phy-addr-swap", &val,
  45                 AR933X_ETH_CFG_SW_PHY_ADDR_SWAP);
  46
  47         __raw_writel(val, base + AR933X_GMAC_REG_ETH_CFG);
  48 }
  49
  50 static void ag71xx_setup_gmac_934x(struct device_node *np, void __iomem *base)
  51 {
  52         u32 val = __raw_readl(base + AR934X_GMAC_REG_ETH_CFG);
  53
  54         ag71xx_of_bit(np, "rgmii-gmac0", &val, AR934X_ETH_CFG_RGMII_GMAC0);
  55         ag71xx_of_bit(np, "mii-gmac0", &val, AR934X_ETH_CFG_MII_GMAC0);
  56         ag71xx_of_bit(np, "gmii-gmac0", &val, AR934X_ETH_CFG_GMII_GMAC0);
  57         ag71xx_of_bit(np, "switch-phy-swap", &val, AR934X_ETH_CFG_SW_PHY_SWAP);
  58         ag71xx_of_bit(np, "switch-only-mode", &val,
  59                 AR934X_ETH_CFG_SW_ONLY_MODE);
  60
  61         __raw_writel(val, base + AR934X_GMAC_REG_ETH_CFG);
  62 }
  63
  64 static void ag71xx_setup_gmac_955x(struct device_node *np, void __iomem *base)
  65 {
  66         u32 val = __raw_readl(base + QCA955X_GMAC_REG_ETH_CFG);
  67
  68         ag71xx_of_bit(np, "rgmii-enabled", &val, QCA955X_ETH_CFG_RGMII_EN);
  69         ag71xx_of_bit(np, "ge0-sgmii", &val, QCA955X_ETH_CFG_GE0_SGMII);
  70         ag71xx_of_set(np, "txen-delay", &val, QCA955X_ETH_CFG_TXE_DELAY_SHIFT, 0x3);
  71         ag71xx_of_set(np, "txd-delay", &val, QCA955X_ETH_CFG_TXD_DELAY_SHIFT, 0x3);
  72         ag71xx_of_set(np, "rxdv-delay", &val, QCA955X_ETH_CFG_RDV_DELAY_SHIFT, 0x3);
  73         ag71xx_of_set(np, "rxd-delay", &val, QCA955X_ETH_CFG_RXD_DELAY_SHIFT, 0x3);
  74
  75         __raw_writel(val, base + QCA955X_GMAC_REG_ETH_CFG);
  76 }
  77
  78 static void ag71xx_setup_gmac_956x(struct device_node *np, void __iomem *base)
  79 {
  80         u32 val = __raw_readl(base + QCA956X_GMAC_REG_ETH_CFG);
  81
  82         ag71xx_of_bit(np, "switch-phy-swap", &val, QCA956X_ETH_CFG_SW_PHY_SWAP);
  83         ag71xx_of_bit(np, "switch-phy-addr-swap", &val,
  84                 QCA956X_ETH_CFG_SW_PHY_ADDR_SWAP);
  85
  86         __raw_writel(val, base + QCA956X_GMAC_REG_ETH_CFG);
  87 }
  88
  89 int ag71xx_setup_gmac(struct device_node *np)
  90 {
  91         struct device_node *np_dev;
  92         void __iomem *base;
  93         int err = 0;
  94
  95         np = of_get_child_by_name(np, "gmac-config");
  96         if (!np)
  97                 return 0;
  98
  99         np_dev = of_parse_phandle(np, "device", 0);
 100         if (!np_dev)
 101                 goto out;
 102
 103         base = of_iomap(np_dev, 0);
 104         if (!base) {
 105                 pr_err("%pOF: can't map GMAC registers\n", np_dev);
 106                 err = -ENOMEM;
 107                 goto err_iomap;
 108         }
 109
 110         if (of_device_is_compatible(np_dev, "qca,ar9330-gmac"))
 111                 ag71xx_setup_gmac_933x(np, base);
 112         else if (of_device_is_compatible(np_dev, "qca,ar9340-gmac"))
 113                 ag71xx_setup_gmac_934x(np, base);
 114         else if (of_device_is_compatible(np_dev, "qca,qca9550-gmac"))
 115                 ag71xx_setup_gmac_955x(np, base);
 116         else if (of_device_is_compatible(np_dev, "qca,qca9560-gmac"))
 117                 ag71xx_setup_gmac_956x(np, base);
 118
 119         iounmap(base);
 120
 121 err_iomap:
 122         of_node_put(np_dev);
 123 out:
 124         of_node_put(np);
 125         return err;
 126 }