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_PADRING_CFG 0x00000004
25 #define NICPM_IOMUX_CTRL 0x00000008
27 #define NICPM_PADRING_CFG_INIT_VAL 0x74000000
28 #define NICPM_IOMUX_CTRL_INIT_VAL_AX 0x21880000
30 #define NICPM_IOMUX_CTRL_INIT_VAL 0x3196e000
31 #define NICPM_IOMUX_CTRL_SPD_SHIFT 10
32 #define NICPM_IOMUX_CTRL_SPD_10M 0
33 #define NICPM_IOMUX_CTRL_SPD_100M 1
34 #define NICPM_IOMUX_CTRL_SPD_1000M 2
36 static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)
38 return readl(bgmac->plat.base + offset);
41 static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
43 writel(value, bgmac->plat.base + offset);
46 static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
48 return readl(bgmac->plat.idm_base + offset);
51 static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
53 writel(value, bgmac->plat.idm_base + offset);
56 static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
58 if (!bgmac->plat.idm_base)
61 if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & BGMAC_CLK_EN) != BGMAC_CLK_EN)
63 if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
68 static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
72 if (!bgmac->plat.idm_base)
75 /* The Reset Control register only contains a single bit to show if the
76 * controller is currently in reset. Do a sanity check here, just in
77 * case the bootloader happened to leave the device in reset.
79 val = bgmac_idm_read(bgmac, BCMA_RESET_CTL);
81 bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
82 bgmac_idm_read(bgmac, BCMA_RESET_CTL);
86 val = bgmac_idm_read(bgmac, BCMA_IOCTL);
87 /* Some bits of BCMA_IOCTL set by HW/ATF and should not change */
88 val |= flags & ~(BGMAC_AWCACHE | BGMAC_ARCACHE | BGMAC_AWUSER |
91 bgmac_idm_write(bgmac, BCMA_IOCTL, val);
92 bgmac_idm_read(bgmac, BCMA_IOCTL);
96 static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
99 /* This shouldn't be encountered */
103 static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)
105 /* This shouldn't be encountered */
111 static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
114 /* This shouldn't be encountered */
118 static void bgmac_nicpm_speed_set(struct net_device *net_dev)
120 struct bgmac *bgmac = netdev_priv(net_dev);
123 if (!bgmac->plat.nicpm_base)
126 /* SET RGMII IO CONFIG */
127 writel(NICPM_PADRING_CFG_INIT_VAL,
128 bgmac->plat.nicpm_base + NICPM_PADRING_CFG);
130 val = NICPM_IOMUX_CTRL_INIT_VAL;
131 switch (bgmac->net_dev->phydev->speed) {
133 netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n");
135 val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT;
138 val |= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT;
141 val |= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT;
145 writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL);
147 bgmac_adjust_link(bgmac->net_dev);
150 static int platform_phy_connect(struct bgmac *bgmac)
152 struct phy_device *phy_dev;
154 if (bgmac->plat.nicpm_base)
155 phy_dev = of_phy_get_and_connect(bgmac->net_dev,
157 bgmac_nicpm_speed_set);
159 phy_dev = of_phy_get_and_connect(bgmac->net_dev,
163 dev_err(bgmac->dev, "PHY connection failed\n");
170 static int bgmac_probe(struct platform_device *pdev)
172 struct device_node *np = pdev->dev.of_node;
174 struct resource *regs;
177 bgmac = bgmac_alloc(&pdev->dev);
181 platform_set_drvdata(pdev, bgmac);
183 /* Set the features of the 4707 family */
184 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
185 bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;
186 bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;
187 bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;
188 bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;
189 bgmac->feature_flags |= BGMAC_FEAT_IDM_MASK;
191 bgmac->dev = &pdev->dev;
192 bgmac->dma_dev = &pdev->dev;
194 mac_addr = of_get_mac_address(np);
196 ether_addr_copy(bgmac->net_dev->dev_addr, mac_addr);
198 dev_warn(&pdev->dev, "MAC address not present in device tree\n");
200 bgmac->irq = platform_get_irq(pdev, 0);
201 if (bgmac->irq < 0) {
202 dev_err(&pdev->dev, "Unable to obtain IRQ\n");
206 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base");
208 dev_err(&pdev->dev, "Unable to obtain base resource\n");
212 bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs);
213 if (IS_ERR(bgmac->plat.base))
214 return PTR_ERR(bgmac->plat.base);
216 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
218 bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
219 if (IS_ERR(bgmac->plat.idm_base))
220 return PTR_ERR(bgmac->plat.idm_base);
221 bgmac->feature_flags &= ~BGMAC_FEAT_IDM_MASK;
224 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");
226 bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,
228 if (IS_ERR(bgmac->plat.nicpm_base))
229 return PTR_ERR(bgmac->plat.nicpm_base);
232 bgmac->read = platform_bgmac_read;
233 bgmac->write = platform_bgmac_write;
234 bgmac->idm_read = platform_bgmac_idm_read;
235 bgmac->idm_write = platform_bgmac_idm_write;
236 bgmac->clk_enabled = platform_bgmac_clk_enabled;
237 bgmac->clk_enable = platform_bgmac_clk_enable;
238 bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset;
239 bgmac->get_bus_clock = platform_bgmac_get_bus_clock;
240 bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32;
241 if (of_parse_phandle(np, "phy-handle", 0)) {
242 bgmac->phy_connect = platform_phy_connect;
244 bgmac->phy_connect = bgmac_phy_connect_direct;
245 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
248 return bgmac_enet_probe(bgmac);
251 static int bgmac_remove(struct platform_device *pdev)
253 struct bgmac *bgmac = platform_get_drvdata(pdev);
255 bgmac_enet_remove(bgmac);
261 static int bgmac_suspend(struct device *dev)
263 struct bgmac *bgmac = dev_get_drvdata(dev);
265 return bgmac_enet_suspend(bgmac);
268 static int bgmac_resume(struct device *dev)
270 struct bgmac *bgmac = dev_get_drvdata(dev);
272 return bgmac_enet_resume(bgmac);
275 static const struct dev_pm_ops bgmac_pm_ops = {
276 .suspend = bgmac_suspend,
277 .resume = bgmac_resume
280 #define BGMAC_PM_OPS (&bgmac_pm_ops)
282 #define BGMAC_PM_OPS NULL
283 #endif /* CONFIG_PM */
285 static const struct of_device_id bgmac_of_enet_match[] = {
286 {.compatible = "brcm,amac",},
287 {.compatible = "brcm,nsp-amac",},
288 {.compatible = "brcm,ns2-amac",},
292 MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);
294 static struct platform_driver bgmac_enet_driver = {
296 .name = "bgmac-enet",
297 .of_match_table = bgmac_of_enet_match,
300 .probe = bgmac_probe,
301 .remove = bgmac_remove,
304 module_platform_driver(bgmac_enet_driver);
305 MODULE_LICENSE("GPL");