cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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usb.c (2021B)

      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 "common.h"
     12#include "cputype.h"
     13#include "irqs.h"
     14
     15#define DAVINCI_USB_OTG_BASE	0x01c64000
     16
     17#if IS_ENABLED(CONFIG_USB_MUSB_HDRC)
     18static struct musb_hdrc_config musb_config = {
     19	.multipoint	= true,
     20
     21	.num_eps	= 5,
     22	.ram_bits	= 10,
     23};
     24
     25static struct musb_hdrc_platform_data usb_data = {
     26	/* OTG requires a Mini-AB connector */
     27	.mode           = MUSB_OTG,
     28	.clock		= "usb",
     29	.config		= &musb_config,
     30};
     31
     32static struct resource usb_resources[] = {
     33	{
     34		/* physical address */
     35		.start          = DAVINCI_USB_OTG_BASE,
     36		.end            = DAVINCI_USB_OTG_BASE + 0x5ff,
     37		.flags          = IORESOURCE_MEM,
     38	},
     39	{
     40		.start          = DAVINCI_INTC_IRQ(IRQ_USBINT),
     41		.flags          = IORESOURCE_IRQ,
     42		.name		= "mc"
     43	},
     44	{
     45		/* placeholder for the dedicated CPPI IRQ */
     46		.flags          = IORESOURCE_IRQ,
     47		.name		= "dma"
     48	},
     49};
     50
     51static u64 usb_dmamask = DMA_BIT_MASK(32);
     52
     53static struct platform_device usb_dev = {
     54	.name           = "musb-davinci",
     55	.id             = -1,
     56	.dev = {
     57		.platform_data		= &usb_data,
     58		.dma_mask		= &usb_dmamask,
     59		.coherent_dma_mask      = DMA_BIT_MASK(32),
     60	},
     61	.resource       = usb_resources,
     62	.num_resources  = ARRAY_SIZE(usb_resources),
     63};
     64
     65void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
     66{
     67	usb_data.power = mA > 510 ? 255 : mA / 2;
     68	usb_data.potpgt = (potpgt_ms + 1) / 2;
     69
     70	if (cpu_is_davinci_dm646x()) {
     71		/* Override the defaults as DM6467 uses different IRQs. */
     72		usb_dev.resource[1].start = DAVINCI_INTC_IRQ(IRQ_DM646X_USBINT);
     73		usb_dev.resource[2].start = DAVINCI_INTC_IRQ(
     74							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
     83void __init davinci_setup_usb(unsigned mA, unsigned potpgt_ms)
     84{
     85}
     86
     87#endif  /* CONFIG_USB_MUSB_HDRC */