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/etherdevice.h>
18 #include <linux/of_address.h>
19 #include <linux/of_net.h>
22 static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)
24 return readl(bgmac->plat.base + offset);
27 static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
29 writel(value, bgmac->plat.base + offset);
32 static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
34 return readl(bgmac->plat.idm_base + offset);
37 static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
39 return writel(value, bgmac->plat.idm_base + offset);
42 static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
44 if ((bgmac_idm_read(bgmac, BCMA_IOCTL) &
45 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC)) != BCMA_IOCTL_CLK)
47 if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
52 static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
54 bgmac_idm_write(bgmac, BCMA_IOCTL,
55 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
56 bgmac_idm_read(bgmac, BCMA_IOCTL);
58 bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
59 bgmac_idm_read(bgmac, BCMA_RESET_CTL);
62 bgmac_idm_write(bgmac, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
63 bgmac_idm_read(bgmac, BCMA_IOCTL);
67 static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
70 /* This shouldn't be encountered */
74 static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)
76 /* This shouldn't be encountered */
82 static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
85 /* This shouldn't be encountered */
89 static int bgmac_probe(struct platform_device *pdev)
91 struct device_node *np = pdev->dev.of_node;
93 struct resource *regs;
96 bgmac = devm_kzalloc(&pdev->dev, sizeof(*bgmac), GFP_KERNEL);
100 platform_set_drvdata(pdev, bgmac);
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;
110 bgmac->dev = &pdev->dev;
111 bgmac->dma_dev = &pdev->dev;
113 mac_addr = of_get_mac_address(np);
115 ether_addr_copy(bgmac->mac_addr, mac_addr);
117 dev_warn(&pdev->dev, "MAC address not present in device tree\n");
119 bgmac->irq = platform_get_irq(pdev, 0);
120 if (bgmac->irq < 0) {
121 dev_err(&pdev->dev, "Unable to obtain IRQ\n");
125 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base");
127 dev_err(&pdev->dev, "Unable to obtain base resource\n");
131 bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs);
132 if (IS_ERR(bgmac->plat.base)) {
133 dev_err(&pdev->dev, "Unable to map base resource\n");
134 return PTR_ERR(bgmac->plat.base);
137 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
139 dev_err(&pdev->dev, "Unable to obtain idm resource\n");
143 bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
144 if (IS_ERR(bgmac->plat.idm_base)) {
145 dev_err(&pdev->dev, "Unable to map idm resource\n");
146 return PTR_ERR(bgmac->plat.idm_base);
149 bgmac->read = platform_bgmac_read;
150 bgmac->write = platform_bgmac_write;
151 bgmac->idm_read = platform_bgmac_idm_read;
152 bgmac->idm_write = platform_bgmac_idm_write;
153 bgmac->clk_enabled = platform_bgmac_clk_enabled;
154 bgmac->clk_enable = platform_bgmac_clk_enable;
155 bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset;
156 bgmac->get_bus_clock = platform_bgmac_get_bus_clock;
157 bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32;
159 return bgmac_enet_probe(bgmac);
162 static int bgmac_remove(struct platform_device *pdev)
164 struct bgmac *bgmac = platform_get_drvdata(pdev);
166 bgmac_enet_remove(bgmac);
171 static const struct of_device_id bgmac_of_enet_match[] = {
172 {.compatible = "brcm,amac",},
173 {.compatible = "brcm,nsp-amac",},
177 MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);
179 static struct platform_driver bgmac_enet_driver = {
181 .name = "bgmac-enet",
182 .of_match_table = bgmac_of_enet_match,
184 .probe = bgmac_probe,
185 .remove = bgmac_remove,
188 module_platform_driver(bgmac_enet_driver);
189 MODULE_LICENSE("GPL");