GNU Linux-libre 4.19.264-gnu1
[releases.git] / arch / arm / mach-davinci / usb.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * USB
4  */
5 #include <linux/init.h>
6 #include <linux/platform_device.h>
7 #include <linux/dma-mapping.h>
8
9 #include <linux/usb/musb.h>
10
11 #include <mach/common.h>
12 #include <mach/irqs.h>
13 #include <mach/cputype.h>
14 #include <linux/platform_data/usb-davinci.h>
15
16 #define DAVINCI_USB_OTG_BASE    0x01c64000
17
18 #if IS_ENABLED(CONFIG_USB_MUSB_HDRC)
19 static struct musb_hdrc_config musb_config = {
20         .multipoint     = true,
21
22         .num_eps        = 5,
23         .ram_bits       = 10,
24 };
25
26 static struct musb_hdrc_platform_data usb_data = {
27         /* OTG requires a Mini-AB connector */
28         .mode           = MUSB_OTG,
29         .clock          = "usb",
30         .config         = &musb_config,
31 };
32
33 static struct resource usb_resources[] = {
34         {
35                 /* physical address */
36                 .start          = DAVINCI_USB_OTG_BASE,
37                 .end            = DAVINCI_USB_OTG_BASE + 0x5ff,
38                 .flags          = IORESOURCE_MEM,
39         },
40         {
41                 .start          = IRQ_USBINT,
42                 .flags          = IORESOURCE_IRQ,
43                 .name           = "mc"
44         },
45         {
46                 /* placeholder for the dedicated CPPI IRQ */
47                 .flags          = IORESOURCE_IRQ,
48                 .name           = "dma"
49         },
50 };
51
52 static u64 usb_dmamask = DMA_BIT_MASK(32);
53
54 static struct platform_device usb_dev = {
55         .name           = "musb-davinci",
56         .id             = -1,
57         .dev = {
58                 .platform_data          = &usb_data,
59                 .dma_mask               = &usb_dmamask,
60                 .coherent_dma_mask      = DMA_BIT_MASK(32),
61         },
62         .resource       = usb_resources,
63         .num_resources  = ARRAY_SIZE(usb_resources),
64 };
65
66 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
67 {
68         usb_data.power = mA > 510 ? 255 : mA / 2;
69         usb_data.potpgt = (potpgt_ms + 1) / 2;
70
71         if (cpu_is_davinci_dm646x()) {
72                 /* Override the defaults as DM6467 uses different IRQs. */
73                 usb_dev.resource[1].start = IRQ_DM646X_USBINT;
74                 usb_dev.resource[2].start = IRQ_DM646X_USBDMAINT;
75         } else  /* other devices don't have dedicated CPPI IRQ */
76                 usb_dev.num_resources = 2;
77
78         platform_device_register(&usb_dev);
79 }
80
81 #else
82
83 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
84 {
85 }
86
87 #endif  /* CONFIG_USB_MUSB_HDRC */