+++ /dev/null
-/*
- * Renesas R-Car USB phy driver
- *
- * Copyright (C) 2012-2013 Renesas Solutions Corp.
- * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
- * Copyright (C) 2013 Cogent Embedded, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#include <linux/delay.h>
-#include <linux/io.h>
-#include <linux/usb/otg.h>
-#include <linux/platform_device.h>
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <linux/platform_data/usb-rcar-phy.h>
-
-/* REGS block */
-#define USBPCTRL0 0x00
-#define USBPCTRL1 0x04
-#define USBST 0x08
-#define USBEH0 0x0C
-#define USBOH0 0x1C
-#define USBCTL0 0x58
-
-/* High-speed signal quality characteristic control registers (R8A7778 only) */
-#define HSQCTL1 0x24
-#define HSQCTL2 0x28
-
-/* USBPCTRL0 */
-#define OVC2 (1 << 10) /* (R8A7779 only) */
- /* Switches the OVC input pin for port 2: */
- /* 1: USB_OVC2, 0: OVC2 */
-#define OVC1_VBUS1 (1 << 9) /* Switches the OVC input pin for port 1: */
- /* 1: USB_OVC1, 0: OVC1/VBUS1 */
- /* Function mode: set to 0 */
-#define OVC0 (1 << 8) /* Switches the OVC input pin for port 0: */
- /* 1: USB_OVC0 pin, 0: OVC0 */
-#define OVC2_ACT (1 << 6) /* (R8A7779 only) */
- /* Host mode: OVC2 polarity: */
- /* 1: active-high, 0: active-low */
-#define PENC (1 << 4) /* Function mode: output level of PENC1 pin: */
- /* 1: high, 0: low */
-#define OVC0_ACT (1 << 3) /* Host mode: OVC0 polarity: */
- /* 1: active-high, 0: active-low */
-#define OVC1_ACT (1 << 1) /* Host mode: OVC1 polarity: */
- /* 1: active-high, 0: active-low */
- /* Function mode: be sure to set to 1 */
-#define PORT1 (1 << 0) /* Selects port 1 mode: */
- /* 1: function, 0: host */
-/* USBPCTRL1 */
-#define PHY_RST (1 << 2)
-#define PLL_ENB (1 << 1)
-#define PHY_ENB (1 << 0)
-
-/* USBST */
-#define ST_ACT (1 << 31)
-#define ST_PLL (1 << 30)
-
-struct rcar_usb_phy_priv {
- struct usb_phy phy;
- spinlock_t lock;
-
- void __iomem *reg0;
- void __iomem *reg1;
- int counter;
-};
-
-#define usb_phy_to_priv(p) container_of(p, struct rcar_usb_phy_priv, phy)
-
-
-/*
- * USB initial/install operation.
- *
- * This function setup USB phy.
- * The used value and setting order came from
- * [USB :: Initial setting] on datasheet.
- */
-static int rcar_usb_phy_init(struct usb_phy *phy)
-{
- struct rcar_usb_phy_priv *priv = usb_phy_to_priv(phy);
- struct device *dev = phy->dev;
- struct rcar_phy_platform_data *pdata = dev_get_platdata(dev);
- void __iomem *reg0 = priv->reg0;
- void __iomem *reg1 = priv->reg1;
- static const u8 ovcn_act[] = { OVC0_ACT, OVC1_ACT, OVC2_ACT };
- int i;
- u32 val;
- unsigned long flags;
-
- spin_lock_irqsave(&priv->lock, flags);
- if (priv->counter++ == 0) {
-
- /*
- * USB phy start-up
- */
-
- /* (1) USB-PHY standby release */
- iowrite32(PHY_ENB, (reg0 + USBPCTRL1));
-
- /* (2) start USB-PHY internal PLL */
- iowrite32(PHY_ENB | PLL_ENB, (reg0 + USBPCTRL1));
-
- /* (3) set USB-PHY in accord with the conditions of usage */
- if (reg1) {
- u32 hsqctl1 = pdata->ferrite_bead ? 0x41 : 0;
- u32 hsqctl2 = pdata->ferrite_bead ? 0x0d : 7;
-
- iowrite32(hsqctl1, reg1 + HSQCTL1);
- iowrite32(hsqctl2, reg1 + HSQCTL2);
- }
-
- /* (4) USB module status check */
- for (i = 0; i < 1024; i++) {
- udelay(10);
- val = ioread32(reg0 + USBST);
- if (val == (ST_ACT | ST_PLL))
- break;
- }
-
- if (val != (ST_ACT | ST_PLL)) {
- dev_err(dev, "USB phy not ready\n");
- goto phy_init_end;
- }
-
- /* (5) USB-PHY reset clear */
- iowrite32(PHY_ENB | PLL_ENB | PHY_RST, (reg0 + USBPCTRL1));
-
- /* Board specific port settings */
- val = 0;
- if (pdata->port1_func)
- val |= PORT1;
- if (pdata->penc1)
- val |= PENC;
- for (i = 0; i < 3; i++) {
- /* OVCn bits follow each other in the right order */
- if (pdata->ovc_pin[i].select_3_3v)
- val |= OVC0 << i;
- /* OVCn_ACT bits are spaced by irregular intervals */
- if (pdata->ovc_pin[i].active_high)
- val |= ovcn_act[i];
- }
- iowrite32(val, (reg0 + USBPCTRL0));
-
- /*
- * Bus alignment settings
- */
-
- /* (1) EHCI bus alignment (little endian) */
- iowrite32(0x00000000, (reg0 + USBEH0));
-
- /* (1) OHCI bus alignment (little endian) */
- iowrite32(0x00000000, (reg0 + USBOH0));
- }
-
-phy_init_end:
- spin_unlock_irqrestore(&priv->lock, flags);
-
- return 0;
-}
-
-static void rcar_usb_phy_shutdown(struct usb_phy *phy)
-{
- struct rcar_usb_phy_priv *priv = usb_phy_to_priv(phy);
- void __iomem *reg0 = priv->reg0;
- unsigned long flags;
-
- spin_lock_irqsave(&priv->lock, flags);
-
- if (priv->counter-- == 1) /* last user */
- iowrite32(0x00000000, (reg0 + USBPCTRL1));
-
- spin_unlock_irqrestore(&priv->lock, flags);
-}
-
-static int rcar_usb_phy_probe(struct platform_device *pdev)
-{
- struct rcar_usb_phy_priv *priv;
- struct resource *res0, *res1;
- struct device *dev = &pdev->dev;
- void __iomem *reg0, *reg1 = NULL;
- int ret;
-
- if (!dev_get_platdata(&pdev->dev)) {
- dev_err(dev, "No platform data\n");
- return -EINVAL;
- }
-
- res0 = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- reg0 = devm_ioremap_resource(dev, res0);
- if (IS_ERR(reg0))
- return PTR_ERR(reg0);
-
- res1 = platform_get_resource(pdev, IORESOURCE_MEM, 1);
- reg1 = devm_ioremap_resource(dev, res1);
- if (IS_ERR(reg1))
- return PTR_ERR(reg1);
-
- priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
-
- priv->reg0 = reg0;
- priv->reg1 = reg1;
- priv->counter = 0;
- priv->phy.dev = dev;
- priv->phy.label = dev_name(dev);
- priv->phy.init = rcar_usb_phy_init;
- priv->phy.shutdown = rcar_usb_phy_shutdown;
- spin_lock_init(&priv->lock);
-
- ret = usb_add_phy(&priv->phy, USB_PHY_TYPE_USB2);
- if (ret < 0) {
- dev_err(dev, "usb phy addition error\n");
- return ret;
- }
-
- platform_set_drvdata(pdev, priv);
-
- return ret;
-}
-
-static int rcar_usb_phy_remove(struct platform_device *pdev)
-{
- struct rcar_usb_phy_priv *priv = platform_get_drvdata(pdev);
-
- usb_remove_phy(&priv->phy);
-
- return 0;
-}
-
-static struct platform_driver rcar_usb_phy_driver = {
- .driver = {
- .name = "rcar_usb_phy",
- },
- .probe = rcar_usb_phy_probe,
- .remove = rcar_usb_phy_remove,
-};
-
-module_platform_driver(rcar_usb_phy_driver);
-
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("Renesas R-Car USB phy");
-MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
projects / cascardo / linux.git / commitdiff