Commit ff7307b5 authored by George Cherian's avatar George Cherian Committed by Felipe Balbi
Browse files

usb: dwc3: omap: initialize the register offset values for omap5 and AM437x 



This patch Initializes the register offset values depending
on the X_MAJOR of USBOTGSS_REVISION register. Also adds register
offset defines and new debug register defines.

X_MAJOR is 2 for both OMAP5 and AM437x. But both have different
glue register layout. Differentiate AM437x using dt compatible.

Register offsets are cached in dwc3_omap struct for reg reads
and writes.

Signed-off-by: default avatarGeorge Cherian <george.cherian@ti.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 1e2a064c

drivers/usb/dwc3/dwc3-omap.c

+57 −0
Original line number Diff line number Diff line
@@ -61,21 +61,38 @@ 
#define USBOTGSS_REVISION			0x0000

#define USBOTGSS_SYSCONFIG			0x0010

#define USBOTGSS_IRQ_EOI			0x0020

#define USBOTGSS_EOI_OFFSET			0x0008

#define USBOTGSS_IRQSTATUS_RAW_0		0x0024

#define USBOTGSS_IRQSTATUS_0			0x0028

#define USBOTGSS_IRQENABLE_SET_0		0x002c

#define USBOTGSS_IRQENABLE_CLR_0		0x0030

#define USBOTGSS_IRQ0_OFFSET			0x0004

#define USBOTGSS_IRQSTATUS_RAW_1		0x0034

#define USBOTGSS_IRQSTATUS_1			0x0038

#define USBOTGSS_IRQENABLE_SET_1		0x003c

#define USBOTGSS_IRQENABLE_CLR_1		0x0040

#define USBOTGSS_IRQSTATUS_EOI_MISC		0x0030

#define USBOTGSS_IRQSTATUS_RAW_MISC		0x0034

#define USBOTGSS_IRQSTATUS_MISC			0x0038

#define USBOTGSS_IRQENABLE_SET_MISC		0x003c

#define USBOTGSS_IRQENABLE_CLR_MISC		0x0040

#define USBOTGSS_IRQMISC_OFFSET			0x03fc

#define USBOTGSS_UTMI_OTG_CTRL			0x0080

#define USBOTGSS_UTMI_OTG_STATUS		0x0084

#define USBOTGSS_UTMI_OTG_OFFSET		0x0480

#define USBOTGSS_TXFIFO_DEPTH			0x0508

#define USBOTGSS_RXFIFO_DEPTH			0x050c

#define USBOTGSS_MMRAM_OFFSET			0x0100

#define USBOTGSS_FLADJ				0x0104

#define USBOTGSS_DEBUG_CFG			0x0108

#define USBOTGSS_DEBUG_DATA			0x010c

#define USBOTGSS_DEV_EBC_EN			0x0110

#define USBOTGSS_DEBUG_OFFSET			0x0600



/* REVISION REGISTER */

#define USBOTGSS_REVISION_XMAJOR(reg)		((reg >> 8) & 0x7)

#define USBOTGSS_REVISION_XMAJOR1		1

#define USBOTGSS_REVISION_XMAJOR2		2

/* SYSCONFIG REGISTER */

#define USBOTGSS_SYSCONFIG_DMADISABLE		(1 << 16)
@@ -300,6 +317,7 @@ static int dwc3_omap_probe(struct platform_device *pdev) 
	int			irq;



	int			utmi_mode = 0;

	int			x_major;



	u32			reg;
@@ -356,6 +374,42 @@ static int dwc3_omap_probe(struct platform_device *pdev) 
		goto err0;

	}



	reg = dwc3_omap_readl(omap->base, USBOTGSS_REVISION);

	omap->revision = reg;

	x_major = USBOTGSS_REVISION_XMAJOR(reg);



	/* Differentiate between OMAP5,AM437x and others*/

	switch (x_major) {

	case USBOTGSS_REVISION_XMAJOR1:

	case USBOTGSS_REVISION_XMAJOR2:

		omap->irq_eoi_offset = 0;

		omap->irq0_offset = 0;

		omap->irqmisc_offset = 0;

		omap->utmi_otg_offset = 0;

		omap->debug_offset = 0;

		break;

	default:

		/* Default to the latest revision */

		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;

		break;

	}



	/* For OMAP5(ES2.0) and AM437x x_major is 2 even though there are

	 * changes in wrapper registers, Using dt compatible for aegis

	 */



	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;

	}



	reg = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);



	of_property_read_u32(node, "utmi-mode", &utmi_mode);
@@ -423,6 +477,9 @@ static const struct of_device_id of_dwc3_match[] = { 
	{

		.compatible =	"ti,dwc3"

	},

	{

		.compatible =	"ti,am437x-dwc3"

	},

	{ },

};

MODULE_DEVICE_TABLE(of, of_dwc3_match);

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