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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> | |
17 | #include <linux/etherdevice.h> | |
18 | #include <linux/of_address.h> | |
19 | #include <linux/of_net.h> | |
20 | #include "bgmac.h" | |
21 | ||
22 | static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset) | |
23 | { | |
24 | return readl(bgmac->plat.base + offset); | |
25 | } | |
26 | ||
27 | static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value) | |
28 | { | |
29 | writel(value, bgmac->plat.base + offset); | |
30 | } | |
31 | ||
32 | static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset) | |
33 | { | |
34 | return readl(bgmac->plat.idm_base + offset); | |
35 | } | |
36 | ||
37 | static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value) | |
38 | { | |
39 | return writel(value, bgmac->plat.idm_base + offset); | |
40 | } | |
41 | ||
42 | static 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 | ||
52 | static 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 | ||
67 | static 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 | ||
74 | static 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 | ||
82 | static 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 | ||
89 | static 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 | dev_err(&pdev->dev, "Unable to map base resource\n"); | |
134 | return PTR_ERR(bgmac->plat.base); | |
135 | } | |
136 | ||
137 | regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base"); | |
138 | if (!regs) { | |
139 | dev_err(&pdev->dev, "Unable to obtain idm resource\n"); | |
140 | return -EINVAL; | |
141 | } | |
142 | ||
143 | bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs); | |
144 | if (!bgmac->plat.idm_base) { | |
145 | dev_err(&pdev->dev, "Unable to map idm resource\n"); | |
146 | return PTR_ERR(bgmac->plat.idm_base); | |
147 | } | |
148 | ||
149 | bgmac->read = platform_bgmac_read; | |
150 | bgmac->write = platform_bgmac_write; | |
151 | bgmac->idm_read = platform_bgmac_idm_read; | |
152 | bgmac->idm_write = platform_bgmac_idm_write; | |
153 | bgmac->clk_enabled = platform_bgmac_clk_enabled; | |
154 | bgmac->clk_enable = platform_bgmac_clk_enable; | |
155 | bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset; | |
156 | bgmac->get_bus_clock = platform_bgmac_get_bus_clock; | |
157 | bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32; | |
158 | ||
159 | return bgmac_enet_probe(bgmac); | |
160 | } | |
161 | ||
162 | static int bgmac_remove(struct platform_device *pdev) | |
163 | { | |
164 | struct bgmac *bgmac = platform_get_drvdata(pdev); | |
165 | ||
166 | bgmac_enet_remove(bgmac); | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static const struct of_device_id bgmac_of_enet_match[] = { | |
172 | {.compatible = "brcm,amac",}, | |
173 | {.compatible = "brcm,nsp-amac",}, | |
174 | {}, | |
175 | }; | |
176 | ||
177 | MODULE_DEVICE_TABLE(of, bgmac_of_enet_match); | |
178 | ||
179 | static struct platform_driver bgmac_enet_driver = { | |
180 | .driver = { | |
181 | .name = "bgmac-enet", | |
182 | .of_match_table = bgmac_of_enet_match, | |
183 | }, | |
184 | .probe = bgmac_probe, | |
185 | .remove = bgmac_remove, | |
186 | }; | |
187 | ||
188 | module_platform_driver(bgmac_enet_driver); | |
189 | MODULE_LICENSE("GPL"); |