[U-Boot] [PATCH 2/3] armv8/fsl-layerscape: add dwc3 gadget driver support

[Lukasz Majewski <l.majewski@samsung.com>]

Hi Rajat,

> From: Rajesh Bhagat <rajesh.bhagat@nxp.com>
> 
> Implements the dwc3 gadget driver support for LS1043
> platform, and performs below operations:
> 1. Enables snooping support for DWC3 controller.
> 2. Enables cache coherency in LS1043 platform.
> 
> Signed-off-by: Rajat Srivastava <rajat.srivastava@nxp.com>
> Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
> ---
>  arch/arm/cpu/armv8/fsl-layerscape/soc.c            | 87
> +++++++++++++++++++++- .../include/asm/arch-fsl-layerscape/immap_lsch2.h
> |  6 ++ .../include/asm/arch-fsl-layerscape/sys_proto.h    | 11 +++
>  drivers/usb/dwc3/core.c                            | 12 +++
>  4 files changed, 114 insertions(+), 2 deletions(-)
>  create mode 100644
> arch/arm/include/asm/arch-fsl-layerscape/sys_proto.h
> 
> diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
> b/arch/arm/cpu/armv8/fsl-layerscape/soc.c index 0fb5c7f..84b973d
> 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
> +++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
> @@ -17,6 +17,10 @@
>  #ifdef CONFIG_CHAIN_OF_TRUST
>  #include <fsl_validate.h>
>  #endif
> +#include <usb.h>
> +#include <dwc3-uboot.h>
> +#include <linux/usb/xhci-fsl.h>
> +
>  
>  DECLARE_GLOBAL_DATA_PTR;
>  
> @@ -318,9 +322,12 @@ void fsl_lsch2_early_init_f(void)
>  #if defined(CONFIG_FSL_QSPI) && !defined(CONFIG_QSPI_BOOT)
>  	out_be32(&scfg->qspi_cfg, SCFG_QSPI_CLKSEL);
>  #endif
> -	/* Make SEC reads and writes snoopable */
> +	/* Make SEC and USB reads and writes snoopable */
>  	setbits_be32(&scfg->snpcnfgcr, SCFG_SNPCNFGCR_SECRDSNP |
> -		     SCFG_SNPCNFGCR_SECWRSNP);
> +		     SCFG_SNPCNFGCR_SECWRSNP |
> SCFG_SNPCNFGCR_USB1RDSNP |
> +		     SCFG_SNPCNFGCR_USB1WRSNP |
> SCFG_SNPCNFGCR_USB2RDSNP |
> +		     SCFG_SNPCNFGCR_USB2WRSNP |
> SCFG_SNPCNFGCR_USB3RDSNP |
> +		     SCFG_SNPCNFGCR_USB3WRSNP);
>  
>  	/*
>  	 * Enable snoop requests and DVM message requests for
> @@ -336,6 +343,82 @@ void fsl_lsch2_early_init_f(void)
>  }
>  #endif
>  
> +#ifdef CONFIG_USB_DWC3
> +
> +#if defined(CONFIG_LS1043A)
> +static struct dwc3_device dwc3_device_data0 = {
> +	.maximum_speed = USB_SPEED_HIGH,
> +	.base = CONFIG_SYS_FSL_XHCI_USB1_ADDR,
> +	.dr_mode = USB_DR_MODE_PERIPHERAL,
> +	.index = 0,
> +};
> +
> +static struct dwc3_device dwc3_device_data1 = {
> +	.maximum_speed = USB_SPEED_HIGH,
> +	.base = CONFIG_SYS_FSL_XHCI_USB2_ADDR,
> +	.dr_mode = USB_DR_MODE_PERIPHERAL,
> +	.index = 1,
> +};
> +
> +static struct dwc3_device dwc3_device_data2 = {
> +	.maximum_speed = USB_SPEED_HIGH,
> +	.base = CONFIG_SYS_FSL_XHCI_USB3_ADDR,
> +	.dr_mode = USB_DR_MODE_PERIPHERAL,
> +	.index = 2,
> +};
> +
> +int usb_gadget_handle_interrupts(int index)
> +{
> +	dwc3_uboot_handle_interrupt(index);
> +	return 0;
> +}
> +#endif
> +
> +int board_usb_init(int index, enum usb_init_type init)
> +{
> +	switch (init) {
> +	case USB_INIT_DEVICE:
> +		switch (index) {
> +#if defined(CONFIG_LS1043A)
> +		case 0:
> +			dwc3_uboot_init(&dwc3_device_data0);
> +			break;
> +
> +		case 1:
> +			dwc3_uboot_init(&dwc3_device_data1);
> +			break;
> +		case 2:
> +			dwc3_uboot_init(&dwc3_device_data2);
> +			break;
> +#endif
> +		default:
> +			printf("Invalid Controller Index\n");
> +			return -1;
> +		}
> +		break;
> +	default:
> +		break;
> +	}
> +	return 0;
> +}
> +
> +int board_usb_cleanup(int index, enum usb_init_type init)
> +{
> +	switch (init) {
> +	case USB_INIT_DEVICE:
> +#if defined(CONFIG_LS1043A)
> +		dwc3_uboot_exit(index);
> +#endif
> +		break;
> +	default:
> +		break;
> +	}
> +	return 0;
> +}
> +#endif
> +
> +
> +
>  #ifdef CONFIG_BOARD_LATE_INIT
>  int board_late_init(void)
>  {
> diff --git a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h
> b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h index
> 57b99d4..13ba1a6 100644 ---
> a/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h +++
> b/arch/arm/include/asm/arch-fsl-layerscape/immap_lsch2.h @@ -328,6
> +328,12 @@ struct ccsr_gur { 
>  #define SCFG_SNPCNFGCR_SECRDSNP		0x80000000
>  #define SCFG_SNPCNFGCR_SECWRSNP		0x40000000
> +#define SCFG_SNPCNFGCR_USB1RDSNP	0x00200000
> +#define SCFG_SNPCNFGCR_USB1WRSNP	0x00100000
> +#define SCFG_SNPCNFGCR_USB2RDSNP	0x00008000
> +#define SCFG_SNPCNFGCR_USB2WRSNP	0x00010000
> +#define SCFG_SNPCNFGCR_USB3RDSNP	0x00002000
> +#define SCFG_SNPCNFGCR_USB3WRSNP	0x00004000
>  
>  /* Supplemental Configuration Unit */
>  struct ccsr_scfg {
> diff --git a/arch/arm/include/asm/arch-fsl-layerscape/sys_proto.h
> b/arch/arm/include/asm/arch-fsl-layerscape/sys_proto.h new file mode
> 100644 index 0000000..252c676
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-fsl-layerscape/sys_proto.h
> @@ -0,0 +1,11 @@
> +/*
> + * Copyright 2016 Freescale Semiconductor
> + *
> + * SPDX-License-Identifier:	GPL-2.0+
> + */
> +
> +#ifndef _ASM_ARMV8_FSL_LAYERSCAPE_SYS_PROTO_H_
> +#define _ASM_ARMV8_FSL_LAYERSCAPE_SYS_PROTO_H_
> +
> +
> +#endif /* _ASM_ARMV8_FSL_LAYERSCAPE_SYS_PROTO_H_ */
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index 85cc96a..5eeb71d 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -690,6 +690,18 @@ int dwc3_uboot_init(struct dwc3_device *dwc3_dev)
>  		return -ENOMEM;
>  	}
>  
> +#if defined(CONFIG_LS1043A)
> +	 /* Change burst beat and outstanding pipelined transfers
> requests */
> +	dwc3_writel(dwc->regs, DWC3_GSBUSCFG0,
> +		    (dwc3_readl(dwc->regs, DWC3_GSBUSCFG0) & ~0xff)
> | 0xf);
> +	dwc3_writel(dwc->regs, DWC3_GSBUSCFG1,
> +		    dwc3_readl(dwc->regs, DWC3_GSBUSCFG1) | 0xf00);
> +
> +	/* Enable snooping */
> +	dwc3_writel(dwc->regs, DWC3_GSBUSCFG0,
> +		    dwc3_readl(dwc->regs, DWC3_GSBUSCFG0) |
> 0x22220000); +#endif
> +
>  	if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
>  		dwc->dr_mode = USB_DR_MODE_HOST;
>  	else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))

Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>

-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group