can: m_can_platform: set net_device structure as driver data
[muen/linux.git] / drivers / net / can / m_can / m_can_platform.c
1 // SPDX-License-Identifier: GPL-2.0
2 // IOMapped CAN bus driver for Bosch M_CAN controller
3 // Copyright (C) 2014 Freescale Semiconductor, Inc.
4 //      Dong Aisheng <b29396@freescale.com>
5 //
6 // Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/
7
8 #include <linux/platform_device.h>
9
10 #include "m_can.h"
11
12 struct m_can_plat_priv {
13         void __iomem *base;
14         void __iomem *mram_base;
15 };
16
17 static u32 iomap_read_reg(struct m_can_classdev *cdev, int reg)
18 {
19         struct m_can_plat_priv *priv = cdev->device_data;
20
21         return readl(priv->base + reg);
22 }
23
24 static u32 iomap_read_fifo(struct m_can_classdev *cdev, int offset)
25 {
26         struct m_can_plat_priv *priv = cdev->device_data;
27
28         return readl(priv->mram_base + offset);
29 }
30
31 static int iomap_write_reg(struct m_can_classdev *cdev, int reg, int val)
32 {
33         struct m_can_plat_priv *priv = cdev->device_data;
34
35         writel(val, priv->base + reg);
36
37         return 0;
38 }
39
40 static int iomap_write_fifo(struct m_can_classdev *cdev, int offset, int val)
41 {
42         struct m_can_plat_priv *priv = cdev->device_data;
43
44         writel(val, priv->mram_base + offset);
45
46         return 0;
47 }
48
49 static struct m_can_ops m_can_plat_ops = {
50         .read_reg = iomap_read_reg,
51         .write_reg = iomap_write_reg,
52         .write_fifo = iomap_write_fifo,
53         .read_fifo = iomap_read_fifo,
54 };
55
56 static int m_can_plat_probe(struct platform_device *pdev)
57 {
58         struct m_can_classdev *mcan_class;
59         struct m_can_plat_priv *priv;
60         struct resource *res;
61         void __iomem *addr;
62         void __iomem *mram_addr;
63         int irq, ret = 0;
64
65         mcan_class = m_can_class_allocate_dev(&pdev->dev);
66         if (!mcan_class)
67                 return -ENOMEM;
68
69         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
70         if (!priv)
71                 return -ENOMEM;
72
73         mcan_class->device_data = priv;
74
75         m_can_class_get_clocks(mcan_class);
76
77         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "m_can");
78         addr = devm_ioremap_resource(&pdev->dev, res);
79         irq = platform_get_irq_byname(pdev, "int0");
80         if (IS_ERR(addr) || irq < 0) {
81                 ret = -EINVAL;
82                 goto failed_ret;
83         }
84
85         /* message ram could be shared */
86         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "message_ram");
87         if (!res) {
88                 ret = -ENODEV;
89                 goto failed_ret;
90         }
91
92         mram_addr = devm_ioremap(&pdev->dev, res->start, resource_size(res));
93         if (!mram_addr) {
94                 ret = -ENOMEM;
95                 goto failed_ret;
96         }
97
98         priv->base = addr;
99         priv->mram_base = mram_addr;
100
101         mcan_class->net->irq = irq;
102         mcan_class->pm_clock_support = 1;
103         mcan_class->can.clock.freq = clk_get_rate(mcan_class->cclk);
104         mcan_class->dev = &pdev->dev;
105
106         mcan_class->ops = &m_can_plat_ops;
107
108         mcan_class->is_peripheral = false;
109
110         platform_set_drvdata(pdev, mcan_class->net);
111
112         m_can_init_ram(mcan_class);
113
114         ret = m_can_class_register(mcan_class);
115
116 failed_ret:
117         return ret;
118 }
119
120 static __maybe_unused int m_can_suspend(struct device *dev)
121 {
122         return m_can_class_suspend(dev);
123 }
124
125 static __maybe_unused int m_can_resume(struct device *dev)
126 {
127         return m_can_class_resume(dev);
128 }
129
130 static int m_can_plat_remove(struct platform_device *pdev)
131 {
132         struct net_device *dev = platform_get_drvdata(pdev);
133         struct m_can_classdev *mcan_class = netdev_priv(dev);
134
135         m_can_class_unregister(mcan_class);
136
137         platform_set_drvdata(pdev, NULL);
138
139         return 0;
140 }
141
142 static int __maybe_unused m_can_runtime_suspend(struct device *dev)
143 {
144         struct net_device *ndev = dev_get_drvdata(dev);
145         struct m_can_classdev *mcan_class = netdev_priv(ndev);
146
147         m_can_class_suspend(dev);
148
149         clk_disable_unprepare(mcan_class->cclk);
150         clk_disable_unprepare(mcan_class->hclk);
151
152         return 0;
153 }
154
155 static int __maybe_unused m_can_runtime_resume(struct device *dev)
156 {
157         struct net_device *ndev = dev_get_drvdata(dev);
158         struct m_can_classdev *mcan_class = netdev_priv(ndev);
159         int err;
160
161         err = clk_prepare_enable(mcan_class->hclk);
162         if (err)
163                 return err;
164
165         err = clk_prepare_enable(mcan_class->cclk);
166         if (err)
167                 clk_disable_unprepare(mcan_class->hclk);
168
169         m_can_class_resume(dev);
170
171         return err;
172 }
173
174 static const struct dev_pm_ops m_can_pmops = {
175         SET_RUNTIME_PM_OPS(m_can_runtime_suspend,
176                            m_can_runtime_resume, NULL)
177         SET_SYSTEM_SLEEP_PM_OPS(m_can_suspend, m_can_resume)
178 };
179
180 static const struct of_device_id m_can_of_table[] = {
181         { .compatible = "bosch,m_can", .data = NULL },
182         { /* sentinel */ },
183 };
184 MODULE_DEVICE_TABLE(of, m_can_of_table);
185
186 static struct platform_driver m_can_plat_driver = {
187         .driver = {
188                 .name = KBUILD_MODNAME,
189                 .of_match_table = m_can_of_table,
190                 .pm     = &m_can_pmops,
191         },
192         .probe = m_can_plat_probe,
193         .remove = m_can_plat_remove,
194 };
195
196 module_platform_driver(m_can_plat_driver);
197
198 MODULE_AUTHOR("Dong Aisheng <b29396@freescale.com>");
199 MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
200 MODULE_LICENSE("GPL v2");
201 MODULE_DESCRIPTION("M_CAN driver for IO Mapped Bosch controllers");