[U-Boot] [u-boot 26/40] usb: dwc3: dwc3-omap: change probe and remove to uboot init and uboot exit code

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

Hi Kishon,

> Removed probe and remove that are specific to linux and replaced it
> with uboot init and uboot exit. These functions will be invoked from
> boardfile.
> 
> This will change once we have dwc3-omap driver adapted to use the
> uboot driver model.
> 
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
> ---
>  drivers/usb/dwc3/dwc3-omap.c |  128
> +++++++++++++-----------------------------
> include/dwc3-omap-uboot.h    |    3 + 2 files changed, 42
> insertions(+), 89 deletions(-)
> 
> diff --git a/drivers/usb/dwc3/dwc3-omap.c
> b/drivers/usb/dwc3/dwc3-omap.c index 31a2aa3..30d7210 100644
> --- a/drivers/usb/dwc3/dwc3-omap.c
> +++ b/drivers/usb/dwc3/dwc3-omap.c
> @@ -17,6 +17,7 @@
>  #include <common.h>
>  #include <malloc.h>
>  #include <asm/io.h>
> +#include <dwc3-omap-uboot.h>
>  #include <linux/usb/dwc3-omap.h>
>  #include <linux/ioport.h>
>  
> @@ -120,6 +121,8 @@ struct dwc3_omap {
>  	u32			dma_status:1;
>  };
>  
> +struct dwc3_omap *omap;
> +
>  static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset)
>  {
>  	return readl(base + offset);
> @@ -278,15 +281,6 @@ static irqreturn_t dwc3_omap_interrupt(int irq,
> void *_omap) return IRQ_HANDLED;
>  }
>  
> -static int dwc3_omap_remove_core(struct device *dev, void *c)
> -{
> -	struct platform_device *pdev = to_platform_device(dev);
> -
> -	of_device_unregister(pdev);
> -
> -	return 0;
> -}
> -
>  static void dwc3_omap_enable_irqs(struct dwc3_omap *omap)
>  {
>  	u32			reg;
> @@ -315,12 +309,8 @@ static void dwc3_omap_disable_irqs(struct
> dwc3_omap *omap) dwc3_omap_write_irq0_set(omap, 0x00);
>  }
>  
> -static u64 dwc3_omap_dma_mask = DMA_BIT_MASK(32);
> -
>  static void dwc3_omap_map_offset(struct dwc3_omap *omap)
>  {
> -	struct device_node	*node = omap->dev->of_node;
> -
>  	/*
>  	 * Differentiate between OMAP5 and AM437x.
>  	 *
> @@ -329,25 +319,21 @@ static void dwc3_omap_map_offset(struct
> dwc3_omap *omap) *
>  	 * Using dt compatible to differentiate AM437x.
>  	 */
> -	if (of_device_is_compatible(node, "ti,am437x-dwc3")) {
> -		omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
> -		omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
> -		omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
> -		omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
> -		omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
> -	}
> +#ifdef CONFIG_AM43XX
> +	omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
> +	omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
> +	omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
> +	omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
> +	omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
> +#endif
>  }
>  
> -static void dwc3_omap_set_utmi_mode(struct dwc3_omap *omap)
> +static void dwc3_omap_set_utmi_mode(struct dwc3_omap *omap, int
> utmi_mode) {
>  	u32			reg;
> -	struct device_node	*node = omap->dev->of_node;
> -	int			utmi_mode = 0;
>  
>  	reg = dwc3_omap_read_utmi_status(omap);
>  
> -	of_property_read_u32(node, "utmi-mode", &utmi_mode);
> -
>  	switch (utmi_mode) {
>  	case DWC3_OMAP_UTMI_MODE_SW:
>  		reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
> @@ -362,95 +348,59 @@ static void dwc3_omap_set_utmi_mode(struct
> dwc3_omap *omap) dwc3_omap_write_utmi_status(omap, reg);
>  }
>  
> -static int dwc3_omap_probe(struct platform_device *pdev)
> +/**
> + * dwc3_omap_uboot_init - dwc3 omap uboot initialization code
> + * @dev: struct dwc3_omap_device containing initialization data
> + *
> + * Entry point for dwc3 omap driver (equivalent to dwc3_omap_probe
> in linux
> + * kernel driver). Pointer to dwc3_omap_device should be passed
> containing
> + * base address and other initialization data. Returns '0' on
> success and
> + * a negative value on failure.
> + *
> + * Generally called from board_usb_init() implemented in board file.
> + */
> +int dwc3_omap_uboot_init(struct dwc3_omap_device *omap_dev)
>  {
> -	struct device_node	*node = pdev->dev.of_node;
> -
> -	struct dwc3_omap	*omap;
> -	struct resource		*res;
> -	struct device		*dev = &pdev->dev;
> -
> -	int			ret;
>  	u32			reg;
> -
> -	void __iomem		*base;
> -
> -	if (!node) {
> -		dev_err(dev, "device node not found\n");
> -		return -EINVAL;
> -	}
> +	struct device		*dev;
>  
>  	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
>  	if (!omap)
>  		return -ENOMEM;
>  
> -	platform_set_drvdata(pdev, omap);
> -
> -	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> -	base = devm_ioremap_resource(dev, res);
> -	if (IS_ERR(base))
> -		return PTR_ERR(base);
> -
> -	omap->dev	= dev;
> -	omap->base	= base;
> -	dev->dma_mask	= &dwc3_omap_dma_mask;
> +	omap->base	= omap_dev->base;
>  
>  	dwc3_omap_map_offset(omap);
> -	dwc3_omap_set_utmi_mode(omap);
> +	dwc3_omap_set_utmi_mode(omap, omap_dev->utmi_mode);
>  
>  	/* check the DMA Status */
>  	reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
>  	omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);
>  
> -	dwc3_omap_enable_irqs(omap);
> +	dwc3_omap_set_mailbox(omap, omap_dev->vbus_id_status);
>  
> -	ret = of_platform_populate(node, NULL, NULL, dev);
> -	if (ret) {
> -		dev_err(&pdev->dev, "failed to create dwc3 core\n");
> -		goto err1;
> -	}
> +	dwc3_omap_enable_irqs(omap);
>  
>  	return 0;
> -
> -err1:
> -	dwc3_omap_disable_irqs(omap);
> -
> -err0:
> -	return ret;
>  }
>  
> -static int dwc3_omap_remove(struct platform_device *pdev)
> +/**
> + * dwc3_omap_uboot_exit - dwc3 omap uboot cleanup code
> + * @index: index of this controller
> + *
> + * Performs cleanup of memory allocated in dwc3_omap_uboot_init
> + * (equivalent to dwc3_omap_remove in linux).
> + *
> + * Generally called from board file.
> + */
> +void dwc3_omap_uboot_exit(void)
>  {
> -	struct dwc3_omap	*omap = platform_get_drvdata(pdev);
> -
>  	dwc3_omap_disable_irqs(omap);
> -	device_for_each_child(&pdev->dev, NULL,
> dwc3_omap_remove_core);
> +	kfree(omap);
>  
>  	return 0;
>  }
>  
> -static const struct of_device_id of_dwc3_match[] = {
> -	{
> -		.compatible =	"ti,dwc3"
> -	},
> -	{
> -		.compatible =	"ti,am437x-dwc3"
> -	},
> -	{ },
> -};
> -MODULE_DEVICE_TABLE(of, of_dwc3_match);
> -
> -static struct platform_driver dwc3_omap_driver = {
> -	.probe		= dwc3_omap_probe,
> -	.remove		= dwc3_omap_remove,
> -	.driver		= {
> -		.name	= "omap-dwc3",
> -		.of_match_table	= of_dwc3_match,
> -	},
> -};
> -
> -module_platform_driver(dwc3_omap_driver);
> -
>  MODULE_ALIAS("platform:omap-dwc3");
>  MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
>  MODULE_LICENSE("GPL v2");
> diff --git a/include/dwc3-omap-uboot.h b/include/dwc3-omap-uboot.h
> index b313b64..99f8f38 100644
> --- a/include/dwc3-omap-uboot.h
> +++ b/include/dwc3-omap-uboot.h
> @@ -24,4 +24,7 @@ struct dwc3_omap_device {
>  	enum dwc3_omap_utmi_mode utmi_mode;
>  	enum omap_dwc3_vbus_id_status vbus_id_status;
>  };
> +
> +int dwc3_omap_uboot_init(struct dwc3_omap_device *dev);
> +void dwc3_omap_uboot_exit(void);
>  #endif /* __DWC3_OMAP_UBOOT_H_ */

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

-- 
Best regards,

Lukasz Majewski

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