This source file includes following definitions.
- xgmac_mac_disable
- vfio_platform_calxedaxgmac_reset
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11 #include <linux/module.h>
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/io.h>
15
16 #include "../vfio_platform_private.h"
17
18 #define DRIVER_VERSION "0.1"
19 #define DRIVER_AUTHOR "Eric Auger <eric.auger@linaro.org>"
20 #define DRIVER_DESC "Reset support for Calxeda xgmac vfio platform device"
21
22
23 #define XGMAC_CONTROL 0x00000000
24
25
26 #define XGMAC_DMA_CONTROL 0x00000f18
27 #define XGMAC_DMA_INTR_ENA 0x00000f1c
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29
30 #define DMA_CONTROL_ST 0x00002000
31 #define DMA_CONTROL_SR 0x00000002
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33
34 #define MAC_ENABLE_TX 0x00000008
35 #define MAC_ENABLE_RX 0x00000004
36
37 static inline void xgmac_mac_disable(void __iomem *ioaddr)
38 {
39 u32 value = readl(ioaddr + XGMAC_DMA_CONTROL);
40
41 value &= ~(DMA_CONTROL_ST | DMA_CONTROL_SR);
42 writel(value, ioaddr + XGMAC_DMA_CONTROL);
43
44 value = readl(ioaddr + XGMAC_CONTROL);
45 value &= ~(MAC_ENABLE_TX | MAC_ENABLE_RX);
46 writel(value, ioaddr + XGMAC_CONTROL);
47 }
48
49 static int vfio_platform_calxedaxgmac_reset(struct vfio_platform_device *vdev)
50 {
51 struct vfio_platform_region *reg = &vdev->regions[0];
52
53 if (!reg->ioaddr) {
54 reg->ioaddr =
55 ioremap_nocache(reg->addr, reg->size);
56 if (!reg->ioaddr)
57 return -ENOMEM;
58 }
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61 writel(0, reg->ioaddr + XGMAC_DMA_INTR_ENA);
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64 xgmac_mac_disable(reg->ioaddr);
65
66 return 0;
67 }
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69 module_vfio_reset_handler("calxeda,hb-xgmac", vfio_platform_calxedaxgmac_reset);
70
71 MODULE_VERSION(DRIVER_VERSION);
72 MODULE_LICENSE("GPL v2");
73 MODULE_AUTHOR(DRIVER_AUTHOR);
74 MODULE_DESCRIPTION(DRIVER_DESC);