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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/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> | |
22 | #include "bgmac.h" | |
23 | ||
24 | #define NICPM_PADRING_CFG 0x00000004 | |
25 | #define NICPM_IOMUX_CTRL 0x00000008 | |
26 | ||
27 | #define NICPM_PADRING_CFG_INIT_VAL 0x74000000 | |
28 | #define NICPM_IOMUX_CTRL_INIT_VAL_AX 0x21880000 | |
29 | ||
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 | |
35 | ||
36 | static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset) | |
37 | { | |
38 | return readl(bgmac->plat.base + offset); | |
39 | } | |
40 | ||
41 | static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value) | |
42 | { | |
43 | writel(value, bgmac->plat.base + offset); | |
44 | } | |
45 | ||
46 | static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset) | |
47 | { | |
48 | return readl(bgmac->plat.idm_base + offset); | |
49 | } | |
50 | ||
51 | static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value) | |
52 | { | |
53 | writel(value, bgmac->plat.idm_base + offset); | |
54 | } | |
55 | ||
56 | static bool platform_bgmac_clk_enabled(struct bgmac *bgmac) | |
57 | { | |
58 | if (!bgmac->plat.idm_base) | |
59 | return true; | |
60 | ||
61 | if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & BGMAC_CLK_EN) != BGMAC_CLK_EN) | |
62 | return false; | |
63 | if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET) | |
64 | return false; | |
65 | return true; | |
66 | } | |
67 | ||
68 | static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags) | |
69 | { | |
70 | u32 val; | |
71 | ||
72 | if (!bgmac->plat.idm_base) | |
73 | return; | |
74 | ||
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. | |
78 | */ | |
79 | val = bgmac_idm_read(bgmac, BCMA_RESET_CTL); | |
80 | if (val) { | |
81 | bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0); | |
82 | bgmac_idm_read(bgmac, BCMA_RESET_CTL); | |
83 | udelay(1); | |
84 | } | |
85 | ||
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 | | |
89 | BGMAC_ARUSER); | |
90 | val |= BGMAC_CLK_EN; | |
91 | bgmac_idm_write(bgmac, BCMA_IOCTL, val); | |
92 | bgmac_idm_read(bgmac, BCMA_IOCTL); | |
93 | udelay(1); | |
94 | } | |
95 | ||
96 | static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset, | |
97 | u32 mask, u32 set) | |
98 | { | |
99 | /* This shouldn't be encountered */ | |
100 | WARN_ON(1); | |
101 | } | |
102 | ||
103 | static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac) | |
104 | { | |
105 | /* This shouldn't be encountered */ | |
106 | WARN_ON(1); | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset, | |
112 | u32 mask, u32 set) | |
113 | { | |
114 | /* This shouldn't be encountered */ | |
115 | WARN_ON(1); | |
116 | } | |
117 | ||
118 | static void bgmac_nicpm_speed_set(struct net_device *net_dev) | |
119 | { | |
120 | struct bgmac *bgmac = netdev_priv(net_dev); | |
121 | u32 val; | |
122 | ||
123 | if (!bgmac->plat.nicpm_base) | |
124 | return; | |
125 | ||
126 | /* SET RGMII IO CONFIG */ | |
127 | writel(NICPM_PADRING_CFG_INIT_VAL, | |
128 | bgmac->plat.nicpm_base + NICPM_PADRING_CFG); | |
129 | ||
130 | val = NICPM_IOMUX_CTRL_INIT_VAL; | |
131 | switch (bgmac->net_dev->phydev->speed) { | |
132 | default: | |
133 | netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n"); | |
134 | fallthrough; | |
135 | case SPEED_1000: | |
136 | val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT; | |
137 | break; | |
138 | case SPEED_100: | |
139 | val |= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT; | |
140 | break; | |
141 | case SPEED_10: | |
142 | val |= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT; | |
143 | break; | |
144 | } | |
145 | ||
146 | writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL); | |
147 | ||
148 | bgmac_adjust_link(bgmac->net_dev); | |
149 | } | |
150 | ||
151 | static int platform_phy_connect(struct bgmac *bgmac) | |
152 | { | |
153 | struct phy_device *phy_dev; | |
154 | ||
155 | if (bgmac->plat.nicpm_base) | |
156 | phy_dev = of_phy_get_and_connect(bgmac->net_dev, | |
157 | bgmac->dev->of_node, | |
158 | bgmac_nicpm_speed_set); | |
159 | else | |
160 | phy_dev = of_phy_get_and_connect(bgmac->net_dev, | |
161 | bgmac->dev->of_node, | |
162 | bgmac_adjust_link); | |
163 | if (!phy_dev) { | |
164 | dev_err(bgmac->dev, "PHY connection failed\n"); | |
165 | return -ENODEV; | |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static int bgmac_probe(struct platform_device *pdev) | |
172 | { | |
173 | struct device_node *np = pdev->dev.of_node; | |
174 | struct bgmac *bgmac; | |
175 | struct resource *regs; | |
176 | const u8 *mac_addr; | |
177 | ||
178 | bgmac = bgmac_alloc(&pdev->dev); | |
179 | if (!bgmac) | |
180 | return -ENOMEM; | |
181 | ||
182 | platform_set_drvdata(pdev, bgmac); | |
183 | ||
184 | /* Set the features of the 4707 family */ | |
185 | bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST; | |
186 | bgmac->feature_flags |= BGMAC_FEAT_NO_RESET; | |
187 | bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4; | |
188 | bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP; | |
189 | bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP; | |
190 | bgmac->feature_flags |= BGMAC_FEAT_IDM_MASK; | |
191 | ||
192 | bgmac->dev = &pdev->dev; | |
193 | bgmac->dma_dev = &pdev->dev; | |
194 | ||
195 | mac_addr = of_get_mac_address(np); | |
196 | if (!IS_ERR(mac_addr)) | |
197 | ether_addr_copy(bgmac->net_dev->dev_addr, mac_addr); | |
198 | else | |
199 | dev_warn(&pdev->dev, "MAC address not present in device tree\n"); | |
200 | ||
201 | bgmac->irq = platform_get_irq(pdev, 0); | |
202 | if (bgmac->irq < 0) | |
203 | return bgmac->irq; | |
204 | ||
205 | bgmac->plat.base = | |
206 | devm_platform_ioremap_resource_byname(pdev, "amac_base"); | |
207 | if (IS_ERR(bgmac->plat.base)) | |
208 | return PTR_ERR(bgmac->plat.base); | |
209 | ||
210 | regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base"); | |
211 | if (regs) { | |
212 | bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs); | |
213 | if (IS_ERR(bgmac->plat.idm_base)) | |
214 | return PTR_ERR(bgmac->plat.idm_base); | |
215 | bgmac->feature_flags &= ~BGMAC_FEAT_IDM_MASK; | |
216 | } | |
217 | ||
218 | regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base"); | |
219 | if (regs) { | |
220 | bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev, | |
221 | regs); | |
222 | if (IS_ERR(bgmac->plat.nicpm_base)) | |
223 | return PTR_ERR(bgmac->plat.nicpm_base); | |
224 | } | |
225 | ||
226 | bgmac->read = platform_bgmac_read; | |
227 | bgmac->write = platform_bgmac_write; | |
228 | bgmac->idm_read = platform_bgmac_idm_read; | |
229 | bgmac->idm_write = platform_bgmac_idm_write; | |
230 | bgmac->clk_enabled = platform_bgmac_clk_enabled; | |
231 | bgmac->clk_enable = platform_bgmac_clk_enable; | |
232 | bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset; | |
233 | bgmac->get_bus_clock = platform_bgmac_get_bus_clock; | |
234 | bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32; | |
235 | if (of_parse_phandle(np, "phy-handle", 0)) { | |
236 | bgmac->phy_connect = platform_phy_connect; | |
237 | } else { | |
238 | bgmac->phy_connect = bgmac_phy_connect_direct; | |
239 | bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500; | |
240 | } | |
241 | ||
242 | return bgmac_enet_probe(bgmac); | |
243 | } | |
244 | ||
245 | static int bgmac_remove(struct platform_device *pdev) | |
246 | { | |
247 | struct bgmac *bgmac = platform_get_drvdata(pdev); | |
248 | ||
249 | bgmac_enet_remove(bgmac); | |
250 | ||
251 | return 0; | |
252 | } | |
253 | ||
254 | #ifdef CONFIG_PM | |
255 | static int bgmac_suspend(struct device *dev) | |
256 | { | |
257 | struct bgmac *bgmac = dev_get_drvdata(dev); | |
258 | ||
259 | return bgmac_enet_suspend(bgmac); | |
260 | } | |
261 | ||
262 | static int bgmac_resume(struct device *dev) | |
263 | { | |
264 | struct bgmac *bgmac = dev_get_drvdata(dev); | |
265 | ||
266 | return bgmac_enet_resume(bgmac); | |
267 | } | |
268 | ||
269 | static const struct dev_pm_ops bgmac_pm_ops = { | |
270 | .suspend = bgmac_suspend, | |
271 | .resume = bgmac_resume | |
272 | }; | |
273 | ||
274 | #define BGMAC_PM_OPS (&bgmac_pm_ops) | |
275 | #else | |
276 | #define BGMAC_PM_OPS NULL | |
277 | #endif /* CONFIG_PM */ | |
278 | ||
279 | static const struct of_device_id bgmac_of_enet_match[] = { | |
280 | {.compatible = "brcm,amac",}, | |
281 | {.compatible = "brcm,nsp-amac",}, | |
282 | {.compatible = "brcm,ns2-amac",}, | |
283 | {}, | |
284 | }; | |
285 | ||
286 | MODULE_DEVICE_TABLE(of, bgmac_of_enet_match); | |
287 | ||
288 | static struct platform_driver bgmac_enet_driver = { | |
289 | .driver = { | |
290 | .name = "bgmac-enet", | |
291 | .of_match_table = bgmac_of_enet_match, | |
292 | .pm = BGMAC_PM_OPS | |
293 | }, | |
294 | .probe = bgmac_probe, | |
295 | .remove = bgmac_remove, | |
296 | }; | |
297 | ||
298 | module_platform_driver(bgmac_enet_driver); | |
299 | MODULE_LICENSE("GPL"); |