1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * USB
4 */
5 #include <linux/dma-mapping.h>
6 #include <linux/init.h>
7 #include <linux/platform_device.h>
8 #include <linux/platform_data/usb-davinci.h>
9 #include <linux/usb/musb.h>
10
11 #include <mach/common.h>
12 #include <mach/cputype.h>
13
14 #include "irqs.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 = DAVINCI_INTC_IRQ(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
davinci_setup_usb(unsigned mA,unsigned potpgt_ms)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 = DAVINCI_INTC_IRQ(IRQ_DM646X_USBINT);
74 usb_dev.resource[2].start = DAVINCI_INTC_IRQ(
75 IRQ_DM646X_USBDMAINT);
76 } else /* other devices don't have dedicated CPPI IRQ */
77 usb_dev.num_resources = 2;
78
79 platform_device_register(&usb_dev);
80 }
81
82 #else
83
davinci_setup_usb(unsigned mA,unsigned potpgt_ms)84 void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
85 {
86 }
87
88 #endif /* CONFIG_USB_MUSB_HDRC */
89