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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 | ||
f3537b34 | 24 | #define NICPM_PADRING_CFG 0x00000004 |
dd5c5d03 JM |
25 | #define NICPM_IOMUX_CTRL 0x00000008 |
26 | ||
f3537b34 JZ |
27 | #define NICPM_PADRING_CFG_INIT_VAL 0x74000000 |
28 | #define NICPM_IOMUX_CTRL_INIT_VAL_AX 0x21880000 | |
29 | ||
dd5c5d03 JM |
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 | ||
f6a95a24 JM |
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 | return writel(value, bgmac->plat.idm_base + offset); | |
54 | } | |
55 | ||
56 | static bool platform_bgmac_clk_enabled(struct bgmac *bgmac) | |
57 | { | |
16206524 | 58 | if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & BGMAC_CLK_EN) != BGMAC_CLK_EN) |
f6a95a24 JM |
59 | return false; |
60 | if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET) | |
61 | return false; | |
62 | return true; | |
63 | } | |
64 | ||
65 | static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags) | |
66 | { | |
16206524 | 67 | u32 val; |
f6a95a24 | 68 | |
16206524 JM |
69 | /* The Reset Control register only contains a single bit to show if the |
70 | * controller is currently in reset. Do a sanity check here, just in | |
71 | * case the bootloader happened to leave the device in reset. | |
72 | */ | |
73 | val = bgmac_idm_read(bgmac, BCMA_RESET_CTL); | |
74 | if (val) { | |
75 | bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0); | |
76 | bgmac_idm_read(bgmac, BCMA_RESET_CTL); | |
77 | udelay(1); | |
78 | } | |
79 | ||
80 | val = bgmac_idm_read(bgmac, BCMA_IOCTL); | |
81 | /* Some bits of BCMA_IOCTL set by HW/ATF and should not change */ | |
82 | val |= flags & ~(BGMAC_AWCACHE | BGMAC_ARCACHE | BGMAC_AWUSER | | |
83 | BGMAC_ARUSER); | |
84 | val |= BGMAC_CLK_EN; | |
85 | bgmac_idm_write(bgmac, BCMA_IOCTL, val); | |
f6a95a24 JM |
86 | bgmac_idm_read(bgmac, BCMA_IOCTL); |
87 | udelay(1); | |
88 | } | |
89 | ||
90 | static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset, | |
91 | u32 mask, u32 set) | |
92 | { | |
93 | /* This shouldn't be encountered */ | |
94 | WARN_ON(1); | |
95 | } | |
96 | ||
97 | static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac) | |
98 | { | |
99 | /* This shouldn't be encountered */ | |
100 | WARN_ON(1); | |
101 | ||
102 | return 0; | |
103 | } | |
104 | ||
105 | static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset, | |
106 | u32 mask, u32 set) | |
107 | { | |
108 | /* This shouldn't be encountered */ | |
109 | WARN_ON(1); | |
110 | } | |
111 | ||
dd5c5d03 JM |
112 | static void bgmac_nicpm_speed_set(struct net_device *net_dev) |
113 | { | |
114 | struct bgmac *bgmac = netdev_priv(net_dev); | |
115 | u32 val; | |
116 | ||
117 | if (!bgmac->plat.nicpm_base) | |
118 | return; | |
119 | ||
f3537b34 JZ |
120 | /* SET RGMII IO CONFIG */ |
121 | writel(NICPM_PADRING_CFG_INIT_VAL, | |
122 | bgmac->plat.nicpm_base + NICPM_PADRING_CFG); | |
123 | ||
dd5c5d03 JM |
124 | val = NICPM_IOMUX_CTRL_INIT_VAL; |
125 | switch (bgmac->net_dev->phydev->speed) { | |
126 | default: | |
127 | netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n"); | |
128 | case SPEED_1000: | |
129 | val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT; | |
130 | break; | |
131 | case SPEED_100: | |
132 | val |= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT; | |
133 | break; | |
134 | case SPEED_10: | |
135 | val |= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT; | |
136 | break; | |
137 | } | |
138 | ||
139 | writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL); | |
140 | ||
141 | bgmac_adjust_link(bgmac->net_dev); | |
142 | } | |
143 | ||
1676aba5 JM |
144 | static int platform_phy_connect(struct bgmac *bgmac) |
145 | { | |
146 | struct phy_device *phy_dev; | |
147 | ||
dd5c5d03 JM |
148 | if (bgmac->plat.nicpm_base) |
149 | phy_dev = of_phy_get_and_connect(bgmac->net_dev, | |
150 | bgmac->dev->of_node, | |
151 | bgmac_nicpm_speed_set); | |
152 | else | |
153 | phy_dev = of_phy_get_and_connect(bgmac->net_dev, | |
154 | bgmac->dev->of_node, | |
155 | bgmac_adjust_link); | |
1676aba5 JM |
156 | if (!phy_dev) { |
157 | dev_err(bgmac->dev, "PHY connection failed\n"); | |
158 | return -ENODEV; | |
159 | } | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
f6a95a24 JM |
164 | static int bgmac_probe(struct platform_device *pdev) |
165 | { | |
166 | struct device_node *np = pdev->dev.of_node; | |
167 | struct bgmac *bgmac; | |
168 | struct resource *regs; | |
169 | const u8 *mac_addr; | |
170 | ||
34a5102c | 171 | bgmac = bgmac_alloc(&pdev->dev); |
f6a95a24 JM |
172 | if (!bgmac) |
173 | return -ENOMEM; | |
174 | ||
175 | platform_set_drvdata(pdev, bgmac); | |
176 | ||
177 | /* Set the features of the 4707 family */ | |
178 | bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST; | |
179 | bgmac->feature_flags |= BGMAC_FEAT_NO_RESET; | |
f6a95a24 JM |
180 | bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4; |
181 | bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP; | |
182 | bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP; | |
183 | ||
184 | bgmac->dev = &pdev->dev; | |
185 | bgmac->dma_dev = &pdev->dev; | |
186 | ||
187 | mac_addr = of_get_mac_address(np); | |
188 | if (mac_addr) | |
6850f8b5 | 189 | ether_addr_copy(bgmac->net_dev->dev_addr, mac_addr); |
f6a95a24 JM |
190 | else |
191 | dev_warn(&pdev->dev, "MAC address not present in device tree\n"); | |
192 | ||
193 | bgmac->irq = platform_get_irq(pdev, 0); | |
194 | if (bgmac->irq < 0) { | |
195 | dev_err(&pdev->dev, "Unable to obtain IRQ\n"); | |
196 | return bgmac->irq; | |
197 | } | |
198 | ||
199 | regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base"); | |
200 | if (!regs) { | |
201 | dev_err(&pdev->dev, "Unable to obtain base resource\n"); | |
202 | return -EINVAL; | |
203 | } | |
204 | ||
205 | bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs); | |
ce3a380d | 206 | if (IS_ERR(bgmac->plat.base)) |
f6a95a24 | 207 | return PTR_ERR(bgmac->plat.base); |
f6a95a24 JM |
208 | |
209 | regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base"); | |
210 | if (!regs) { | |
211 | dev_err(&pdev->dev, "Unable to obtain idm resource\n"); | |
212 | return -EINVAL; | |
213 | } | |
214 | ||
215 | bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs); | |
ce3a380d | 216 | if (IS_ERR(bgmac->plat.idm_base)) |
f6a95a24 | 217 | return PTR_ERR(bgmac->plat.idm_base); |
f6a95a24 | 218 | |
dd5c5d03 JM |
219 | regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base"); |
220 | if (regs) { | |
221 | bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev, | |
222 | regs); | |
223 | if (IS_ERR(bgmac->plat.nicpm_base)) | |
224 | return PTR_ERR(bgmac->plat.nicpm_base); | |
225 | } | |
226 | ||
f6a95a24 JM |
227 | bgmac->read = platform_bgmac_read; |
228 | bgmac->write = platform_bgmac_write; | |
229 | bgmac->idm_read = platform_bgmac_idm_read; | |
230 | bgmac->idm_write = platform_bgmac_idm_write; | |
231 | bgmac->clk_enabled = platform_bgmac_clk_enabled; | |
232 | bgmac->clk_enable = platform_bgmac_clk_enable; | |
233 | bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset; | |
234 | bgmac->get_bus_clock = platform_bgmac_get_bus_clock; | |
235 | bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32; | |
1676aba5 JM |
236 | if (of_parse_phandle(np, "phy-handle", 0)) { |
237 | bgmac->phy_connect = platform_phy_connect; | |
238 | } else { | |
239 | bgmac->phy_connect = bgmac_phy_connect_direct; | |
240 | bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500; | |
241 | } | |
f6a95a24 JM |
242 | |
243 | return bgmac_enet_probe(bgmac); | |
244 | } | |
245 | ||
246 | static int bgmac_remove(struct platform_device *pdev) | |
247 | { | |
248 | struct bgmac *bgmac = platform_get_drvdata(pdev); | |
249 | ||
250 | bgmac_enet_remove(bgmac); | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
f3537b34 JZ |
255 | #ifdef CONFIG_PM |
256 | static int bgmac_suspend(struct device *dev) | |
257 | { | |
258 | struct bgmac *bgmac = dev_get_drvdata(dev); | |
259 | ||
260 | return bgmac_enet_suspend(bgmac); | |
261 | } | |
262 | ||
263 | static int bgmac_resume(struct device *dev) | |
264 | { | |
265 | struct bgmac *bgmac = dev_get_drvdata(dev); | |
266 | ||
267 | return bgmac_enet_resume(bgmac); | |
268 | } | |
269 | ||
270 | static const struct dev_pm_ops bgmac_pm_ops = { | |
271 | .suspend = bgmac_suspend, | |
272 | .resume = bgmac_resume | |
273 | }; | |
274 | ||
275 | #define BGMAC_PM_OPS (&bgmac_pm_ops) | |
276 | #else | |
277 | #define BGMAC_PM_OPS NULL | |
278 | #endif /* CONFIG_PM */ | |
279 | ||
f6a95a24 JM |
280 | static const struct of_device_id bgmac_of_enet_match[] = { |
281 | {.compatible = "brcm,amac",}, | |
282 | {.compatible = "brcm,nsp-amac",}, | |
dd5c5d03 | 283 | {.compatible = "brcm,ns2-amac",}, |
f6a95a24 JM |
284 | {}, |
285 | }; | |
286 | ||
287 | MODULE_DEVICE_TABLE(of, bgmac_of_enet_match); | |
288 | ||
289 | static struct platform_driver bgmac_enet_driver = { | |
290 | .driver = { | |
291 | .name = "bgmac-enet", | |
292 | .of_match_table = bgmac_of_enet_match, | |
f3537b34 | 293 | .pm = BGMAC_PM_OPS |
f6a95a24 JM |
294 | }, |
295 | .probe = bgmac_probe, | |
296 | .remove = bgmac_remove, | |
297 | }; | |
298 | ||
299 | module_platform_driver(bgmac_enet_driver); | |
300 | MODULE_LICENSE("GPL"); |