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/etherdevice.h> 18 #include <linux/of_address.h> 19 #include <linux/of_net.h> 20 #include "bgmac.h" 21 22 static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset) 23 { 24 return readl(bgmac->plat.base + offset); 25 } 26 27 static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value) 28 { 29 writel(value, bgmac->plat.base + offset); 30 } 31 32 static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset) 33 { 34 return readl(bgmac->plat.idm_base + offset); 35 } 36 37 static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value) 38 { 39 return writel(value, bgmac->plat.idm_base + offset); 40 } 41 42 static bool platform_bgmac_clk_enabled(struct bgmac *bgmac) 43 { 44 if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & 45 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC)) != BCMA_IOCTL_CLK) 46 return false; 47 if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET) 48 return false; 49 return true; 50 } 51 52 static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags) 53 { 54 bgmac_idm_write(bgmac, BCMA_IOCTL, 55 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags)); 56 bgmac_idm_read(bgmac, BCMA_IOCTL); 57 58 bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0); 59 bgmac_idm_read(bgmac, BCMA_RESET_CTL); 60 udelay(1); 61 62 bgmac_idm_write(bgmac, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags)); 63 bgmac_idm_read(bgmac, BCMA_IOCTL); 64 udelay(1); 65 } 66 67 static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset, 68 u32 mask, u32 set) 69 { 70 /* This shouldn't be encountered */ 71 WARN_ON(1); 72 } 73 74 static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac) 75 { 76 /* This shouldn't be encountered */ 77 WARN_ON(1); 78 79 return 0; 80 } 81 82 static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset, 83 u32 mask, u32 set) 84 { 85 /* This shouldn't be encountered */ 86 WARN_ON(1); 87 } 88 89 static int bgmac_probe(struct platform_device *pdev) 90 { 91 struct device_node *np = pdev->dev.of_node; 92 struct bgmac *bgmac; 93 struct resource *regs; 94 const u8 *mac_addr; 95 96 bgmac = devm_kzalloc(&pdev->dev, sizeof(*bgmac), GFP_KERNEL); 97 if (!bgmac) 98 return -ENOMEM; 99 100 platform_set_drvdata(pdev, bgmac); 101 102 /* Set the features of the 4707 family */ 103 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST; 104 bgmac->feature_flags |= BGMAC_FEAT_NO_RESET; 105 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500; 106 bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4; 107 bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP; 108 bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP; 109 110 bgmac->dev = &pdev->dev; 111 bgmac->dma_dev = &pdev->dev; 112 113 mac_addr = of_get_mac_address(np); 114 if (mac_addr) 115 ether_addr_copy(bgmac->mac_addr, mac_addr); 116 else 117 dev_warn(&pdev->dev, "MAC address not present in device tree\n"); 118 119 bgmac->irq = platform_get_irq(pdev, 0); 120 if (bgmac->irq < 0) { 121 dev_err(&pdev->dev, "Unable to obtain IRQ\n"); 122 return bgmac->irq; 123 } 124 125 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base"); 126 if (!regs) { 127 dev_err(&pdev->dev, "Unable to obtain base resource\n"); 128 return -EINVAL; 129 } 130 131 bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs); 132 if (IS_ERR(bgmac->plat.base)) 133 return PTR_ERR(bgmac->plat.base); 134 135 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base"); 136 if (!regs) { 137 dev_err(&pdev->dev, "Unable to obtain idm resource\n"); 138 return -EINVAL; 139 } 140 141 bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs); 142 if (IS_ERR(bgmac->plat.idm_base)) 143 return PTR_ERR(bgmac->plat.idm_base); 144 145 bgmac->read = platform_bgmac_read; 146 bgmac->write = platform_bgmac_write; 147 bgmac->idm_read = platform_bgmac_idm_read; 148 bgmac->idm_write = platform_bgmac_idm_write; 149 bgmac->clk_enabled = platform_bgmac_clk_enabled; 150 bgmac->clk_enable = platform_bgmac_clk_enable; 151 bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset; 152 bgmac->get_bus_clock = platform_bgmac_get_bus_clock; 153 bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32; 154 155 return bgmac_enet_probe(bgmac); 156 } 157 158 static int bgmac_remove(struct platform_device *pdev) 159 { 160 struct bgmac *bgmac = platform_get_drvdata(pdev); 161 162 bgmac_enet_remove(bgmac); 163 164 return 0; 165 } 166 167 static const struct of_device_id bgmac_of_enet_match[] = { 168 {.compatible = "brcm,amac",}, 169 {.compatible = "brcm,nsp-amac",}, 170 {}, 171 }; 172 173 MODULE_DEVICE_TABLE(of, bgmac_of_enet_match); 174 175 static struct platform_driver bgmac_enet_driver = { 176 .driver = { 177 .name = "bgmac-enet", 178 .of_match_table = bgmac_of_enet_match, 179 }, 180 .probe = bgmac_probe, 181 .remove = bgmac_remove, 182 }; 183 184 module_platform_driver(bgmac_enet_driver); 185 MODULE_LICENSE("GPL"); 186