tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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/etherdevice.h>
18#include <linux/of_address.h>
19#include <linux/of_net.h>
20#include "bgmac.h"
21
22static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)
23{
24 return readl(bgmac->plat.base + offset);
25}
26
27static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
28{
29 writel(value, bgmac->plat.base + offset);
30}
31
32static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
33{
34 return readl(bgmac->plat.idm_base + offset);
35}
36
37static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
38{
39 return writel(value, bgmac->plat.idm_base + offset);
40}
41
42static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
43{
44 if ((bgmac_idm_read(bgmac, BCMA_IOCTL) &
45 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC)) != BCMA_IOCTL_CLK)
46 return false;
47 if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
48 return false;
49 return true;
50}
51
52static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
53{
54 bgmac_idm_write(bgmac, BCMA_IOCTL,
55 (BCMA_IOCTL_CLK | BCMA_IOCTL_FGC | flags));
56 bgmac_idm_read(bgmac, BCMA_IOCTL);
57
58 bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
59 bgmac_idm_read(bgmac, BCMA_RESET_CTL);
60 udelay(1);
61
62 bgmac_idm_write(bgmac, BCMA_IOCTL, (BCMA_IOCTL_CLK | flags));
63 bgmac_idm_read(bgmac, BCMA_IOCTL);
64 udelay(1);
65}
66
67static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
68 u32 mask, u32 set)
69{
70 /* This shouldn't be encountered */
71 WARN_ON(1);
72}
73
74static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)
75{
76 /* This shouldn't be encountered */
77 WARN_ON(1);
78
79 return 0;
80}
81
82static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
83 u32 mask, u32 set)
84{
85 /* This shouldn't be encountered */
86 WARN_ON(1);
87}
88
89static int bgmac_probe(struct platform_device *pdev)
90{
91 struct device_node *np = pdev->dev.of_node;
92 struct bgmac *bgmac;
93 struct resource *regs;
94 const u8 *mac_addr;
95
96 bgmac = devm_kzalloc(&pdev->dev, sizeof(*bgmac), GFP_KERNEL);
97 if (!bgmac)
98 return -ENOMEM;
99
100 platform_set_drvdata(pdev, bgmac);
101
102 /* Set the features of the 4707 family */
103 bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
104 bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;
105 bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
106 bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;
107 bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;
108 bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;
109
110 bgmac->dev = &pdev->dev;
111 bgmac->dma_dev = &pdev->dev;
112
113 mac_addr = of_get_mac_address(np);
114 if (mac_addr)
115 ether_addr_copy(bgmac->mac_addr, mac_addr);
116 else
117 dev_warn(&pdev->dev, "MAC address not present in device tree\n");
118
119 bgmac->irq = platform_get_irq(pdev, 0);
120 if (bgmac->irq < 0) {
121 dev_err(&pdev->dev, "Unable to obtain IRQ\n");
122 return bgmac->irq;
123 }
124
125 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base");
126 if (!regs) {
127 dev_err(&pdev->dev, "Unable to obtain base resource\n");
128 return -EINVAL;
129 }
130
131 bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs);
132 if (IS_ERR(bgmac->plat.base))
133 return PTR_ERR(bgmac->plat.base);
134
135 regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
136 if (!regs) {
137 dev_err(&pdev->dev, "Unable to obtain idm resource\n");
138 return -EINVAL;
139 }
140
141 bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
142 if (IS_ERR(bgmac->plat.idm_base))
143 return PTR_ERR(bgmac->plat.idm_base);
144
145 bgmac->read = platform_bgmac_read;
146 bgmac->write = platform_bgmac_write;
147 bgmac->idm_read = platform_bgmac_idm_read;
148 bgmac->idm_write = platform_bgmac_idm_write;
149 bgmac->clk_enabled = platform_bgmac_clk_enabled;
150 bgmac->clk_enable = platform_bgmac_clk_enable;
151 bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset;
152 bgmac->get_bus_clock = platform_bgmac_get_bus_clock;
153 bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32;
154
155 return bgmac_enet_probe(bgmac);
156}
157
158static int bgmac_remove(struct platform_device *pdev)
159{
160 struct bgmac *bgmac = platform_get_drvdata(pdev);
161
162 bgmac_enet_remove(bgmac);
163
164 return 0;
165}
166
167static const struct of_device_id bgmac_of_enet_match[] = {
168 {.compatible = "brcm,amac",},
169 {.compatible = "brcm,nsp-amac",},
170 {},
171};
172
173MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);
174
175static struct platform_driver bgmac_enet_driver = {
176 .driver = {
177 .name = "bgmac-enet",
178 .of_match_table = bgmac_of_enet_match,
179 },
180 .probe = bgmac_probe,
181 .remove = bgmac_remove,
182};
183
184module_platform_driver(bgmac_enet_driver);
185MODULE_LICENSE("GPL");