2 * Copyright (C) 2016 Broadcom
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.
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.
14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
24 #define NICPM_IOMUX_CTRL 0x00000008
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
32 static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)
34 return readl(bgmac->plat.base + offset);
37 static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
39 writel(value, bgmac->plat.base + offset);
42 static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
44 return readl(bgmac->plat.idm_base + offset);
47 static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
49 return writel(value, bgmac->plat.idm_base + offset);
52 static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
54 if ((bgmac_idm_read(bgmac, BCMA_IOCTL) &
55 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC)) != BCMA_IOCTL_CLK)
57 if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
62 static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
64 bgmac_idm_write(bgmac, BCMA_IOCTL,
65 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
66 bgmac_idm_read(bgmac, BCMA_IOCTL);
68 bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
69 bgmac_idm_read(bgmac, BCMA_RESET_CTL);
72 bgmac_idm_write(bgmac, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
73 bgmac_idm_read(bgmac, BCMA_IOCTL);
77 static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
80 /* This shouldn't be encountered */
84 static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)
86 /* This shouldn't be encountered */
92 static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
95 /* This shouldn't be encountered */
99 static void bgmac_nicpm_speed_set(struct net_device *net_dev)
101 struct bgmac *bgmac = netdev_priv(net_dev);
104 if (!bgmac->plat.nicpm_base)
107 val = NICPM_IOMUX_CTRL_INIT_VAL;
108 switch (bgmac->net_dev->phydev->speed) {
110 netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n");
112 val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT;
115 val |= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT;
118 val |= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT;
122 writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL);
124 bgmac_adjust_link(bgmac->net_dev);
127 static int platform_phy_connect(struct bgmac *bgmac)
129 struct phy_device *phy_dev;
131 if (bgmac->plat.nicpm_base)
132 phy_dev = of_phy_get_and_connect(bgmac->net_dev,
134 bgmac_nicpm_speed_set);
136 phy_dev = of_phy_get_and_connect(bgmac->net_dev,
140 dev_err(bgmac->dev, "PHY connection failed\n");
147 static int bgmac_probe(struct platform_device *pdev)
149 struct device_node *np = pdev->dev.of_node;
151 struct resource *regs;
154 bgmac = bgmac_alloc(&pdev->dev);
158 platform_set_drvdata(pdev, bgmac);
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;
167 bgmac->dev = &pdev->dev;
168 bgmac->dma_dev = &pdev->dev;
170 mac_addr = of_get_mac_address(np);
172 ether_addr_copy(bgmac->net_dev->dev_addr, mac_addr);
174 dev_warn(&pdev->dev, "MAC address not present in device tree\n");
176 bgmac->irq = platform_get_irq(pdev, 0);
177 if (bgmac->irq < 0) {
178 dev_err(&pdev->dev, "Unable to obtain IRQ\n");
182 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base");
184 dev_err(&pdev->dev, "Unable to obtain base resource\n");
188 bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs);
189 if (IS_ERR(bgmac->plat.base))
190 return PTR_ERR(bgmac->plat.base);
192 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
194 dev_err(&pdev->dev, "Unable to obtain idm resource\n");
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);
202 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");
204 bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,
206 if (IS_ERR(bgmac->plat.nicpm_base))
207 return PTR_ERR(bgmac->plat.nicpm_base);
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;
222 bgmac->phy_connect = bgmac_phy_connect_direct;
223 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
226 return bgmac_enet_probe(bgmac);
229 static int bgmac_remove(struct platform_device *pdev)
231 struct bgmac *bgmac = platform_get_drvdata(pdev);
233 bgmac_enet_remove(bgmac);
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",},
245 MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);
247 static struct platform_driver bgmac_enet_driver = {
249 .name = "bgmac-enet",
250 .of_match_table = bgmac_of_enet_match,
252 .probe = bgmac_probe,
253 .remove = bgmac_remove,
256 module_platform_driver(bgmac_enet_driver);
257 MODULE_LICENSE("GPL");