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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
36static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)
37{
38 return readl(bgmac->plat.base + offset);
39}
40
41static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
42{
43 writel(value, bgmac->plat.base + offset);
44}
45
46static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
47{
48 return readl(bgmac->plat.idm_base + offset);
49}
50
51static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
52{
53 writel(value, bgmac->plat.idm_base + offset);
54}
55
56static 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
68static 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
76
77
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
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
96static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
97 u32 mask, u32 set)
98{
99
100 WARN_ON(1);
101}
102
103static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)
104{
105
106 WARN_ON(1);
107
108 return 0;
109}
110
111static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
112 u32 mask, u32 set)
113{
114
115 WARN_ON(1);
116}
117
118static 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
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
151static 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
171static 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 int ret;
177
178 bgmac = bgmac_alloc(&pdev->dev);
179 if (!bgmac)
180 return -ENOMEM;
181
182 platform_set_drvdata(pdev, bgmac);
183
184
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 ret = of_get_mac_address(np, bgmac->net_dev->dev_addr);
196 if (ret)
197 dev_warn(&pdev->dev,
198 "MAC address not present in device tree\n");
199
200 bgmac->irq = platform_get_irq(pdev, 0);
201 if (bgmac->irq < 0)
202 return bgmac->irq;
203
204 bgmac->plat.base =
205 devm_platform_ioremap_resource_byname(pdev, "amac_base");
206 if (IS_ERR(bgmac->plat.base))
207 return PTR_ERR(bgmac->plat.base);
208
209 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
210 if (regs) {
211 bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
212 if (IS_ERR(bgmac->plat.idm_base))
213 return PTR_ERR(bgmac->plat.idm_base);
214 bgmac->feature_flags &= ~BGMAC_FEAT_IDM_MASK;
215 }
216
217 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");
218 if (regs) {
219 bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,
220 regs);
221 if (IS_ERR(bgmac->plat.nicpm_base))
222 return PTR_ERR(bgmac->plat.nicpm_base);
223 }
224
225 bgmac->read = platform_bgmac_read;
226 bgmac->write = platform_bgmac_write;
227 bgmac->idm_read = platform_bgmac_idm_read;
228 bgmac->idm_write = platform_bgmac_idm_write;
229 bgmac->clk_enabled = platform_bgmac_clk_enabled;
230 bgmac->clk_enable = platform_bgmac_clk_enable;
231 bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset;
232 bgmac->get_bus_clock = platform_bgmac_get_bus_clock;
233 bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32;
234 if (of_parse_phandle(np, "phy-handle", 0)) {
235 bgmac->phy_connect = platform_phy_connect;
236 } else {
237 bgmac->phy_connect = bgmac_phy_connect_direct;
238 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
239 }
240
241 return bgmac_enet_probe(bgmac);
242}
243
244static int bgmac_remove(struct platform_device *pdev)
245{
246 struct bgmac *bgmac = platform_get_drvdata(pdev);
247
248 bgmac_enet_remove(bgmac);
249
250 return 0;
251}
252
253#ifdef CONFIG_PM
254static int bgmac_suspend(struct device *dev)
255{
256 struct bgmac *bgmac = dev_get_drvdata(dev);
257
258 return bgmac_enet_suspend(bgmac);
259}
260
261static int bgmac_resume(struct device *dev)
262{
263 struct bgmac *bgmac = dev_get_drvdata(dev);
264
265 return bgmac_enet_resume(bgmac);
266}
267
268static const struct dev_pm_ops bgmac_pm_ops = {
269 .suspend = bgmac_suspend,
270 .resume = bgmac_resume
271};
272
273#define BGMAC_PM_OPS (&bgmac_pm_ops)
274#else
275#define BGMAC_PM_OPS NULL
276#endif
277
278static const struct of_device_id bgmac_of_enet_match[] = {
279 {.compatible = "brcm,amac",},
280 {.compatible = "brcm,nsp-amac",},
281 {.compatible = "brcm,ns2-amac",},
282 {},
283};
284
285MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);
286
287static struct platform_driver bgmac_enet_driver = {
288 .driver = {
289 .name = "bgmac-enet",
290 .of_match_table = bgmac_of_enet_match,
291 .pm = BGMAC_PM_OPS
292 },
293 .probe = bgmac_probe,
294 .remove = bgmac_remove,
295};
296
297module_platform_driver(bgmac_enet_driver);
298MODULE_LICENSE("GPL");
299
