1 /* 2 * Copyright (C) 2016 Broadcom 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License as 6 * published by the Free Software Foundation version 2. 7 * 8 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 9 * kind, whether express or implied; without even the implied warranty 10 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 15 16 #include <linux/bcma/bcma.h> 17 #include <linux/brcmphy.h> 18 #include <linux/etherdevice.h> 19 #include <linux/of_address.h> 20 #include <linux/of_mdio.h> 21 #include <linux/of_net.h> 22 #include "bgmac.h" 23 24 #define NICPM_IOMUX_CTRL 0x00000008 25 26 #define NICPM_IOMUX_CTRL_INIT_VAL 0x3196e000 27 #define NICPM_IOMUX_CTRL_SPD_SHIFT 10 28 #define NICPM_IOMUX_CTRL_SPD_10M 0 29 #define NICPM_IOMUX_CTRL_SPD_100M 1 30 #define NICPM_IOMUX_CTRL_SPD_1000M 2 31 32 static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset) 33 { 34 return readl(bgmac->plat.base + offset); 35 } 36 37 static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value) 38 { 39 writel(value, bgmac->plat.base + offset); 40 } 41 42 static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset) 43 { 44 return readl(bgmac->plat.idm_base + offset); 45 } 46 47 static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value) 48 { 49 return writel(value, bgmac->plat.idm_base + offset); 50 } 51 52 static bool platform_bgmac_clk_enabled(struct bgmac *bgmac) 53 { 54 if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & 55 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC)) != BCMA_IOCTL_CLK) 56 return false; 57 if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET) 58 return false; 59 return true; 60 } 61 62 static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags) 63 { 64 bgmac_idm_write(bgmac, BCMA_IOCTL, 65 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags)); 66 bgmac_idm_read(bgmac, BCMA_IOCTL); 67 68 bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0); 69 bgmac_idm_read(bgmac, BCMA_RESET_CTL); 70 udelay(1); 71 72 bgmac_idm_write(bgmac, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags)); 73 bgmac_idm_read(bgmac, BCMA_IOCTL); 74 udelay(1); 75 } 76 77 static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset, 78 u32 mask, u32 set) 79 { 80 /* This shouldn't be encountered */ 81 WARN_ON(1); 82 } 83 84 static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac) 85 { 86 /* This shouldn't be encountered */ 87 WARN_ON(1); 88 89 return 0; 90 } 91 92 static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset, 93 u32 mask, u32 set) 94 { 95 /* This shouldn't be encountered */ 96 WARN_ON(1); 97 } 98 99 static void bgmac_nicpm_speed_set(struct net_device *net_dev) 100 { 101 struct bgmac *bgmac = netdev_priv(net_dev); 102 u32 val; 103 104 if (!bgmac->plat.nicpm_base) 105 return; 106 107 val = NICPM_IOMUX_CTRL_INIT_VAL; 108 switch (bgmac->net_dev->phydev->speed) { 109 default: 110 netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n"); 111 case SPEED_1000: 112 val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT; 113 break; 114 case SPEED_100: 115 val |= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT; 116 break; 117 case SPEED_10: 118 val |= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT; 119 break; 120 } 121 122 writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL); 123 124 bgmac_adjust_link(bgmac->net_dev); 125 } 126 127 static int platform_phy_connect(struct bgmac *bgmac) 128 { 129 struct phy_device *phy_dev; 130 131 if (bgmac->plat.nicpm_base) 132 phy_dev = of_phy_get_and_connect(bgmac->net_dev, 133 bgmac->dev->of_node, 134 bgmac_nicpm_speed_set); 135 else 136 phy_dev = of_phy_get_and_connect(bgmac->net_dev, 137 bgmac->dev->of_node, 138 bgmac_adjust_link); 139 if (!phy_dev) { 140 dev_err(bgmac->dev, "PHY connection failed\n"); 141 return -ENODEV; 142 } 143 144 return 0; 145 } 146 147 static int bgmac_probe(struct platform_device *pdev) 148 { 149 struct device_node *np = pdev->dev.of_node; 150 struct bgmac *bgmac; 151 struct resource *regs; 152 const u8 *mac_addr; 153 154 bgmac = bgmac_alloc(&pdev->dev); 155 if (!bgmac) 156 return -ENOMEM; 157 158 platform_set_drvdata(pdev, bgmac); 159 160 /* Set the features of the 4707 family */ 161 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST; 162 bgmac->feature_flags |= BGMAC_FEAT_NO_RESET; 163 bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4; 164 bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP; 165 bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP; 166 167 bgmac->dev = &pdev->dev; 168 bgmac->dma_dev = &pdev->dev; 169 170 mac_addr = of_get_mac_address(np); 171 if (mac_addr) 172 ether_addr_copy(bgmac->net_dev->dev_addr, mac_addr); 173 else 174 dev_warn(&pdev->dev, "MAC address not present in device tree\n"); 175 176 bgmac->irq = platform_get_irq(pdev, 0); 177 if (bgmac->irq < 0) { 178 dev_err(&pdev->dev, "Unable to obtain IRQ\n"); 179 return bgmac->irq; 180 } 181 182 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base"); 183 if (!regs) { 184 dev_err(&pdev->dev, "Unable to obtain base resource\n"); 185 return -EINVAL; 186 } 187 188 bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs); 189 if (IS_ERR(bgmac->plat.base)) 190 return PTR_ERR(bgmac->plat.base); 191 192 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base"); 193 if (!regs) { 194 dev_err(&pdev->dev, "Unable to obtain idm resource\n"); 195 return -EINVAL; 196 } 197 198 bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs); 199 if (IS_ERR(bgmac->plat.idm_base)) 200 return PTR_ERR(bgmac->plat.idm_base); 201 202 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base"); 203 if (regs) { 204 bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev, 205 regs); 206 if (IS_ERR(bgmac->plat.nicpm_base)) 207 return PTR_ERR(bgmac->plat.nicpm_base); 208 } 209 210 bgmac->read = platform_bgmac_read; 211 bgmac->write = platform_bgmac_write; 212 bgmac->idm_read = platform_bgmac_idm_read; 213 bgmac->idm_write = platform_bgmac_idm_write; 214 bgmac->clk_enabled = platform_bgmac_clk_enabled; 215 bgmac->clk_enable = platform_bgmac_clk_enable; 216 bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset; 217 bgmac->get_bus_clock = platform_bgmac_get_bus_clock; 218 bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32; 219 if (of_parse_phandle(np, "phy-handle", 0)) { 220 bgmac->phy_connect = platform_phy_connect; 221 } else { 222 bgmac->phy_connect = bgmac_phy_connect_direct; 223 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500; 224 } 225 226 return bgmac_enet_probe(bgmac); 227 } 228 229 static int bgmac_remove(struct platform_device *pdev) 230 { 231 struct bgmac *bgmac = platform_get_drvdata(pdev); 232 233 bgmac_enet_remove(bgmac); 234 235 return 0; 236 } 237 238 static const struct of_device_id bgmac_of_enet_match[] = { 239 {.compatible = "brcm,amac",}, 240 {.compatible = "brcm,nsp-amac",}, 241 {.compatible = "brcm,ns2-amac",}, 242 {}, 243 }; 244 245 MODULE_DEVICE_TABLE(of, bgmac_of_enet_match); 246 247 static struct platform_driver bgmac_enet_driver = { 248 .driver = { 249 .name = "bgmac-enet", 250 .of_match_table = bgmac_of_enet_match, 251 }, 252 .probe = bgmac_probe, 253 .remove = bgmac_remove, 254 }; 255 256 module_platform_driver(bgmac_enet_driver); 257 MODULE_LICENSE("GPL"); 258