devices.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * linux/arch/arm/mach-mmp/devices.c
 */

#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/delay.h>

#include <asm/irq.h>
#include "irqs.h"
#include "devices.h"
#include <linux/soc/mmp/cputype.h>
#include "regs-usb.h"

int __init pxa_register_device(struct pxa_device_desc *desc,
				void *data, size_t size)
{
	struct platform_device *pdev;
	struct resource res[2 + MAX_RESOURCE_DMA];
	int i, ret = 0, nres = 0;

	pdev = platform_device_alloc(desc->drv_name, desc->id);
	if (pdev == NULL)
		return -ENOMEM;

	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);

	memset(res, 0, sizeof(res));

	if (desc->start != -1ul && desc->size > 0) {
		res[nres].start	= desc->start;
		res[nres].end	= desc->start + desc->size - 1;
		res[nres].flags	= IORESOURCE_MEM;
		nres++;
	}

	if (desc->irq != NO_IRQ) {
		res[nres].start	= desc->irq;
		res[nres].end	= desc->irq;
		res[nres].flags	= IORESOURCE_IRQ;
		nres++;
	}

	for (i = 0; i < MAX_RESOURCE_DMA; i++, nres++) {
		if (desc->dma[i] == 0)
			break;

		res[nres].start	= desc->dma[i];
		res[nres].end	= desc->dma[i];
		res[nres].flags	= IORESOURCE_DMA;
	}

	ret = platform_device_add_resources(pdev, res, nres);
	if (ret) {
		platform_device_put(pdev);
		return ret;
	}

	if (data && size) {
		ret = platform_device_add_data(pdev, data, size);
		if (ret) {
			platform_device_put(pdev);
			return ret;
		}
	}

	return platform_device_add(pdev);
}

#if IS_ENABLED(CONFIG_USB) || IS_ENABLED(CONFIG_USB_GADGET)
#if IS_ENABLED(CONFIG_USB_MV_UDC) || IS_ENABLED(CONFIG_USB_EHCI_MV)
#if IS_ENABLED(CONFIG_CPU_PXA910) || IS_ENABLED(CONFIG_CPU_PXA168)

/*****************************************************************************
 * The registers read/write routines
 *****************************************************************************/

static unsigned int u2o_get(void __iomem *base, unsigned int offset)
{
	return readl_relaxed(base + offset);
}

static void u2o_set(void __iomem *base, unsigned int offset,
		unsigned int value)
{
	u32 reg;

	reg = readl_relaxed(base + offset);
	reg |= value;
	writel_relaxed(reg, base + offset);
	readl_relaxed(base + offset);
}

static void u2o_clear(void __iomem *base, unsigned int offset,
		unsigned int value)
{
	u32 reg;

	reg = readl_relaxed(base + offset);
	reg &= ~value;
	writel_relaxed(reg, base + offset);
	readl_relaxed(base + offset);
}

static void u2o_write(void __iomem *base, unsigned int offset,
		unsigned int value)
{
	writel_relaxed(value, base + offset);
	readl_relaxed(base + offset);
}


static DEFINE_MUTEX(phy_lock);
static int phy_init_cnt;

static int usb_phy_init_internal(void __iomem *base)
{
	int loops;

	pr_info("Init usb phy!!!\n");

	/* Initialize the USB PHY power */
	if (cpu_is_pxa910()) {
		u2o_set(base, UTMI_CTRL, (1<<UTMI_CTRL_INPKT_DELAY_SOF_SHIFT)
			| (1<<UTMI_CTRL_PU_REF_SHIFT));
	}

	u2o_set(base, UTMI_CTRL, 1<<UTMI_CTRL_PLL_PWR_UP_SHIFT);
	u2o_set(base, UTMI_CTRL, 1<<UTMI_CTRL_PWR_UP_SHIFT);

	/* UTMI_PLL settings */
	u2o_clear(base, UTMI_PLL, UTMI_PLL_PLLVDD18_MASK
		| UTMI_PLL_PLLVDD12_MASK | UTMI_PLL_PLLCALI12_MASK
		| UTMI_PLL_FBDIV_MASK | UTMI_PLL_REFDIV_MASK
		| UTMI_PLL_ICP_MASK | UTMI_PLL_KVCO_MASK);

	u2o_set(base, UTMI_PLL, 0xee<<UTMI_PLL_FBDIV_SHIFT
		| 0xb<<UTMI_PLL_REFDIV_SHIFT | 3<<UTMI_PLL_PLLVDD18_SHIFT
		| 3<<UTMI_PLL_PLLVDD12_SHIFT | 3<<UTMI_PLL_PLLCALI12_SHIFT
		| 1<<UTMI_PLL_ICP_SHIFT | 3<<UTMI_PLL_KVCO_SHIFT);

	/* UTMI_TX */
	u2o_clear(base, UTMI_TX, UTMI_TX_REG_EXT_FS_RCAL_EN_MASK
		| UTMI_TX_TXVDD12_MASK | UTMI_TX_CK60_PHSEL_MASK
		| UTMI_TX_IMPCAL_VTH_MASK | UTMI_TX_REG_EXT_FS_RCAL_MASK
		| UTMI_TX_AMP_MASK);
	u2o_set(base, UTMI_TX, 3<<UTMI_TX_TXVDD12_SHIFT
		| 4<<UTMI_TX_CK60_PHSEL_SHIFT | 4<<UTMI_TX_IMPCAL_VTH_SHIFT
		| 8<<UTMI_TX_REG_EXT_FS_RCAL_SHIFT | 3<<UTMI_TX_AMP_SHIFT);

	/* UTMI_RX */
	u2o_clear(base, UTMI_RX, UTMI_RX_SQ_THRESH_MASK
		| UTMI_REG_SQ_LENGTH_MASK);
	u2o_set(base, UTMI_RX, 7<<UTMI_RX_SQ_THRESH_SHIFT
		| 2<<UTMI_REG_SQ_LENGTH_SHIFT);

	/* UTMI_IVREF */
	if (cpu_is_pxa168())
		/* fixing Microsoft Altair board interface with NEC hub issue -
		 * Set UTMI_IVREF from 0x4a3 to 0x4bf */
		u2o_write(base, UTMI_IVREF, 0x4bf);

	/* toggle VCOCAL_START bit of UTMI_PLL */
	udelay(200);
	u2o_set(base, UTMI_PLL, VCOCAL_START);
	udelay(40);
	u2o_clear(base, UTMI_PLL, VCOCAL_START);

	/* toggle REG_RCAL_START bit of UTMI_TX */
	udelay(400);
	u2o_set(base, UTMI_TX, REG_RCAL_START);
	udelay(40);
	u2o_clear(base, UTMI_TX, REG_RCAL_START);
	udelay(400);

	/* Make sure PHY PLL is ready */
	loops = 0;
	while ((u2o_get(base, UTMI_PLL) & PLL_READY) == 0) {
		mdelay(1);
		loops++;
		if (loops > 100) {
			printk(KERN_WARNING "calibrate timeout, UTMI_PLL %x\n",
				u2o_get(base, UTMI_PLL));
			break;
		}
	}

	if (cpu_is_pxa168()) {
		u2o_set(base, UTMI_RESERVE, 1 << 5);
		/* Turn on UTMI PHY OTG extension */
		u2o_write(base, UTMI_OTG_ADDON, 1);
	}

	return 0;
}

static int usb_phy_deinit_internal(void __iomem *base)
{
	pr_info("Deinit usb phy!!!\n");

	if (cpu_is_pxa168())
		u2o_clear(base, UTMI_OTG_ADDON, UTMI_OTG_ADDON_OTG_ON);

	u2o_clear(base, UTMI_CTRL, UTMI_CTRL_RXBUF_PDWN);
	u2o_clear(base, UTMI_CTRL, UTMI_CTRL_TXBUF_PDWN);
	u2o_clear(base, UTMI_CTRL, UTMI_CTRL_USB_CLK_EN);
	u2o_clear(base, UTMI_CTRL, 1<<UTMI_CTRL_PWR_UP_SHIFT);
	u2o_clear(base, UTMI_CTRL, 1<<UTMI_CTRL_PLL_PWR_UP_SHIFT);

	return 0;
}

int pxa_usb_phy_init(void __iomem *phy_reg)
{
	mutex_lock(&phy_lock);
	if (phy_init_cnt++ == 0)
		usb_phy_init_internal(phy_reg);
	mutex_unlock(&phy_lock);
	return 0;
}

void pxa_usb_phy_deinit(void __iomem *phy_reg)
{
	WARN_ON(phy_init_cnt == 0);

	mutex_lock(&phy_lock);
	if (--phy_init_cnt == 0)
		usb_phy_deinit_internal(phy_reg);
	mutex_unlock(&phy_lock);
}
#endif
#endif
#endif

#if IS_ENABLED(CONFIG_USB_SUPPORT)
static u64 __maybe_unused usb_dma_mask = ~(u32)0;

#if IS_ENABLED(CONFIG_PHY_PXA_USB)
struct resource pxa168_usb_phy_resources[] = {
	[0] = {
		.start	= PXA168_U2O_PHYBASE,
		.end	= PXA168_U2O_PHYBASE + USB_PHY_RANGE,
		.flags	= IORESOURCE_MEM,
	},
};

struct platform_device pxa168_device_usb_phy = {
	.name		= "pxa-usb-phy",
	.id		= -1,
	.resource	= pxa168_usb_phy_resources,
	.num_resources	= ARRAY_SIZE(pxa168_usb_phy_resources),
	.dev		=  {
		.dma_mask	= &usb_dma_mask,
		.coherent_dma_mask = 0xffffffff,
	}
};
#endif /* CONFIG_PHY_PXA_USB */

#if IS_ENABLED(CONFIG_USB_MV_UDC)
struct resource pxa168_u2o_resources[] = {
	/* regbase */
	[0] = {
		.start	= PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
		.end	= PXA168_U2O_REGBASE + USB_REG_RANGE,
		.flags	= IORESOURCE_MEM,
		.name	= "capregs",
	},
	/* phybase */
	[1] = {
		.start	= PXA168_U2O_PHYBASE,
		.end	= PXA168_U2O_PHYBASE + USB_PHY_RANGE,
		.flags	= IORESOURCE_MEM,
		.name	= "phyregs",
	},
	[2] = {
		.start	= IRQ_PXA168_USB1,
		.end	= IRQ_PXA168_USB1,
		.flags	= IORESOURCE_IRQ,
	},
};

struct platform_device pxa168_device_u2o = {
	.name		= "mv-udc",
	.id		= -1,
	.resource	= pxa168_u2o_resources,
	.num_resources	= ARRAY_SIZE(pxa168_u2o_resources),
	.dev		=  {
		.dma_mask	= &usb_dma_mask,
		.coherent_dma_mask = 0xffffffff,
	}
};
#endif /* CONFIG_USB_MV_UDC */

#if IS_ENABLED(CONFIG_USB_EHCI_MV_U2O)
struct resource pxa168_u2oehci_resources[] = {
	[0] = {
		.start	= PXA168_U2O_REGBASE,
		.end	= PXA168_U2O_REGBASE + USB_REG_RANGE,
		.flags	= IORESOURCE_MEM,
	},
	[1] = {
		.start	= IRQ_PXA168_USB1,
		.end	= IRQ_PXA168_USB1,
		.flags	= IORESOURCE_IRQ,
	},
};

struct platform_device pxa168_device_u2oehci = {
	.name		= "pxa-u2oehci",
	.id		= -1,
	.dev		= {
		.dma_mask		= &usb_dma_mask,
		.coherent_dma_mask	= 0xffffffff,
	},

	.num_resources	= ARRAY_SIZE(pxa168_u2oehci_resources),
	.resource	= pxa168_u2oehci_resources,
};
#endif

#if IS_ENABLED(CONFIG_USB_MV_OTG)
struct resource pxa168_u2ootg_resources[] = {
	/* regbase */
	[0] = {
		.start	= PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
		.end	= PXA168_U2O_REGBASE + USB_REG_RANGE,
		.flags	= IORESOURCE_MEM,
		.name	= "capregs",
	},
	/* phybase */
	[1] = {
		.start	= PXA168_U2O_PHYBASE,
		.end	= PXA168_U2O_PHYBASE + USB_PHY_RANGE,
		.flags	= IORESOURCE_MEM,
		.name	= "phyregs",
	},
	[2] = {
		.start	= IRQ_PXA168_USB1,
		.end	= IRQ_PXA168_USB1,
		.flags	= IORESOURCE_IRQ,
	},
};

struct platform_device pxa168_device_u2ootg = {
	.name		= "mv-otg",
	.id		= -1,
	.dev  = {
		.dma_mask          = &usb_dma_mask,
		.coherent_dma_mask = 0xffffffff,
	},

	.num_resources	= ARRAY_SIZE(pxa168_u2ootg_resources),
	.resource      = pxa168_u2ootg_resources,
};
#endif /* CONFIG_USB_MV_OTG */

#endif