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f6a95a24 JM |
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> | |
dd5c5d03 | 17 | #include <linux/brcmphy.h> |
f6a95a24 JM |
18 | #include <linux/etherdevice.h> |
19 | #include <linux/of_address.h> | |
1676aba5 | 20 | #include <linux/of_mdio.h> |
f6a95a24 JM |
21 | #include <linux/of_net.h> |
22 | #include "bgmac.h" | |
23 | ||
dd5c5d03 JM |
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 | ||
f6a95a24 JM |
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 | ||
dd5c5d03 JM |
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 | ||
1676aba5 JM |
127 | static int platform_phy_connect(struct bgmac *bgmac) |
128 | { | |
129 | struct phy_device *phy_dev; | |
130 | ||
dd5c5d03 JM |
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); | |
1676aba5 JM |
139 | if (!phy_dev) { |
140 | dev_err(bgmac->dev, "PHY connection failed\n"); | |
141 | return -ENODEV; | |
142 | } | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
f6a95a24 JM |
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 = devm_kzalloc(&pdev->dev, sizeof(*bgmac), GFP_KERNEL); | |
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; | |
f6a95a24 JM |
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->mac_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); | |
ce3a380d | 189 | if (IS_ERR(bgmac->plat.base)) |
f6a95a24 | 190 | return PTR_ERR(bgmac->plat.base); |
f6a95a24 JM |
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); | |
ce3a380d | 199 | if (IS_ERR(bgmac->plat.idm_base)) |
f6a95a24 | 200 | return PTR_ERR(bgmac->plat.idm_base); |
f6a95a24 | 201 | |
dd5c5d03 JM |
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 | ||
f6a95a24 JM |
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; | |
1676aba5 JM |
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 | } | |
f6a95a24 JM |
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",}, | |
dd5c5d03 | 241 | {.compatible = "brcm,ns2-amac",}, |
f6a95a24 JM |
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"); |