summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/broadcom/bgmac-platform.c
blob: c46c1b1416f7902da038b0896a7ec01456545b0b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
/*
 * Copyright (C) 2016 Broadcom
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation version 2.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether express or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#define pr_fmt(fmt)		KBUILD_MODNAME ": " fmt

#include <linux/bcma/bcma.h>
#include <linux/brcmphy.h>
#include <linux/etherdevice.h>
#include <linux/of_address.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include "bgmac.h"

#define NICPM_PADRING_CFG		0x00000004
#define NICPM_IOMUX_CTRL		0x00000008

#define NICPM_PADRING_CFG_INIT_VAL	0x74000000
#define NICPM_IOMUX_CTRL_INIT_VAL_AX	0x21880000

#define NICPM_IOMUX_CTRL_INIT_VAL	0x3196e000
#define NICPM_IOMUX_CTRL_SPD_SHIFT	10
#define NICPM_IOMUX_CTRL_SPD_10M	0
#define NICPM_IOMUX_CTRL_SPD_100M	1
#define NICPM_IOMUX_CTRL_SPD_1000M	2

static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)
{
	return readl(bgmac->plat.base + offset);
}

static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
{
	writel(value, bgmac->plat.base + offset);
}

static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
{
	return readl(bgmac->plat.idm_base + offset);
}

static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
{
	writel(value, bgmac->plat.idm_base + offset);
}

static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
{
	if (!bgmac->plat.idm_base)
		return true;

	if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & BGMAC_CLK_EN) != BGMAC_CLK_EN)
		return false;
	if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
		return false;
	return true;
}

static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
{
	u32 val;

	if (!bgmac->plat.idm_base)
		return;

	/* The Reset Control register only contains a single bit to show if the
	 * controller is currently in reset.  Do a sanity check here, just in
	 * case the bootloader happened to leave the device in reset.
	 */
	val = bgmac_idm_read(bgmac, BCMA_RESET_CTL);
	if (val) {
		bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
		bgmac_idm_read(bgmac, BCMA_RESET_CTL);
		udelay(1);
	}

	val = bgmac_idm_read(bgmac, BCMA_IOCTL);
	/* Some bits of BCMA_IOCTL set by HW/ATF and should not change */
	val |= flags & ~(BGMAC_AWCACHE | BGMAC_ARCACHE | BGMAC_AWUSER |
			 BGMAC_ARUSER);
	val |= BGMAC_CLK_EN;
	bgmac_idm_write(bgmac, BCMA_IOCTL, val);
	bgmac_idm_read(bgmac, BCMA_IOCTL);
	udelay(1);
}

static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
					   u32 mask, u32 set)
{
	/* This shouldn't be encountered */
	WARN_ON(1);
}

static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)
{
	/* This shouldn't be encountered */
	WARN_ON(1);

	return 0;
}

static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
					 u32 mask, u32 set)
{
	/* This shouldn't be encountered */
	WARN_ON(1);
}

static void bgmac_nicpm_speed_set(struct net_device *net_dev)
{
	struct bgmac *bgmac = netdev_priv(net_dev);
	u32 val;

	if (!bgmac->plat.nicpm_base)
		return;

	/* SET RGMII IO CONFIG */
	writel(NICPM_PADRING_CFG_INIT_VAL,
	       bgmac->plat.nicpm_base + NICPM_PADRING_CFG);

	val = NICPM_IOMUX_CTRL_INIT_VAL;
	switch (bgmac->net_dev->phydev->speed) {
	default:
		netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n");
		/* fall through */
	case SPEED_1000:
		val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT;
		break;
	case SPEED_100:
		val |= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT;
		break;
	case SPEED_10:
		val |= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT;
		break;
	}

	writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL);

	bgmac_adjust_link(bgmac->net_dev);
}

static int platform_phy_connect(struct bgmac *bgmac)
{
	struct phy_device *phy_dev;

	if (bgmac->plat.nicpm_base)
		phy_dev = of_phy_get_and_connect(bgmac->net_dev,
						 bgmac->dev->of_node,
						 bgmac_nicpm_speed_set);
	else
		phy_dev = of_phy_get_and_connect(bgmac->net_dev,
						 bgmac->dev->of_node,
						 bgmac_adjust_link);
	if (!phy_dev) {
		dev_err(bgmac->dev, "PHY connection failed\n");
		return -ENODEV;
	}

	return 0;
}

static int bgmac_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct bgmac *bgmac;
	struct resource *regs;
	const u8 *mac_addr;

	bgmac = bgmac_alloc(&pdev->dev);
	if (!bgmac)
		return -ENOMEM;

	platform_set_drvdata(pdev, bgmac);

	/* Set the features of the 4707 family */
	bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
	bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;
	bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;
	bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;
	bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;
	bgmac->feature_flags |= BGMAC_FEAT_IDM_MASK;

	bgmac->dev = &pdev->dev;
	bgmac->dma_dev = &pdev->dev;

	mac_addr = of_get_mac_address(np);
	if (!IS_ERR(mac_addr))
		ether_addr_copy(bgmac->net_dev->dev_addr, mac_addr);
	else
		dev_warn(&pdev->dev, "MAC address not present in device tree\n");

	bgmac->irq = platform_get_irq(pdev, 0);
	if (bgmac->irq < 0)
		return bgmac->irq;

	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base");
	if (!regs) {
		dev_err(&pdev->dev, "Unable to obtain base resource\n");
		return -EINVAL;
	}

	bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs);
	if (IS_ERR(bgmac->plat.base))
		return PTR_ERR(bgmac->plat.base);

	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
	if (regs) {
		bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
		if (IS_ERR(bgmac->plat.idm_base))
			return PTR_ERR(bgmac->plat.idm_base);
		bgmac->feature_flags &= ~BGMAC_FEAT_IDM_MASK;
	}

	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");
	if (regs) {
		bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,
							       regs);
		if (IS_ERR(bgmac->plat.nicpm_base))
			return PTR_ERR(bgmac->plat.nicpm_base);
	}

	bgmac->read = platform_bgmac_read;
	bgmac->write = platform_bgmac_write;
	bgmac->idm_read = platform_bgmac_idm_read;
	bgmac->idm_write = platform_bgmac_idm_write;
	bgmac->clk_enabled = platform_bgmac_clk_enabled;
	bgmac->clk_enable = platform_bgmac_clk_enable;
	bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset;
	bgmac->get_bus_clock = platform_bgmac_get_bus_clock;
	bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32;
	if (of_parse_phandle(np, "phy-handle", 0)) {
		bgmac->phy_connect = platform_phy_connect;
	} else {
		bgmac->phy_connect = bgmac_phy_connect_direct;
		bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
	}

	return bgmac_enet_probe(bgmac);
}

static int bgmac_remove(struct platform_device *pdev)
{
	struct bgmac *bgmac = platform_get_drvdata(pdev);

	bgmac_enet_remove(bgmac);

	return 0;
}

#ifdef CONFIG_PM
static int bgmac_suspend(struct device *dev)
{
	struct bgmac *bgmac = dev_get_drvdata(dev);

	return bgmac_enet_suspend(bgmac);
}

static int bgmac_resume(struct device *dev)
{
	struct bgmac *bgmac = dev_get_drvdata(dev);

	return bgmac_enet_resume(bgmac);
}

static const struct dev_pm_ops bgmac_pm_ops = {
	.suspend = bgmac_suspend,
	.resume = bgmac_resume
};

#define BGMAC_PM_OPS (&bgmac_pm_ops)
#else
#define BGMAC_PM_OPS NULL
#endif /* CONFIG_PM */

static const struct of_device_id bgmac_of_enet_match[] = {
	{.compatible = "brcm,amac",},
	{.compatible = "brcm,nsp-amac",},
	{.compatible = "brcm,ns2-amac",},
	{},
};

MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);

static struct platform_driver bgmac_enet_driver = {
	.driver = {
		.name  = "bgmac-enet",
		.of_match_table = bgmac_of_enet_match,
		.pm = BGMAC_PM_OPS
	},
	.probe = bgmac_probe,
	.remove = bgmac_remove,
};

module_platform_driver(bgmac_enet_driver);
MODULE_LICENSE("GPL");