aboutsummaryrefslogtreecommitdiff
path: root/drivers/usb/phy/phy-omap-usb3.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/phy/phy-omap-usb3.c')
-rw-r--r--drivers/usb/phy/phy-omap-usb3.c347
1 files changed, 0 insertions, 347 deletions
diff --git a/drivers/usb/phy/phy-omap-usb3.c b/drivers/usb/phy/phy-omap-usb3.c
deleted file mode 100644
index 4e8a0405f95..00000000000
--- a/drivers/usb/phy/phy-omap-usb3.c
+++ /dev/null
@@ -1,347 +0,0 @@
-/*
- * omap-usb3 - USB PHY, talking to dwc3 controller in OMAP.
- *
- * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * Author: Kishon Vijay Abraham I <kishon@ti.com>
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/usb/omap_usb.h>
-#include <linux/of.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/pm_runtime.h>
-#include <linux/delay.h>
-#include <linux/usb/omap_control_usb.h>
-
-#define PLL_STATUS 0x00000004
-#define PLL_GO 0x00000008
-#define PLL_CONFIGURATION1 0x0000000C
-#define PLL_CONFIGURATION2 0x00000010
-#define PLL_CONFIGURATION3 0x00000014
-#define PLL_CONFIGURATION4 0x00000020
-
-#define PLL_REGM_MASK 0x001FFE00
-#define PLL_REGM_SHIFT 0x9
-#define PLL_REGM_F_MASK 0x0003FFFF
-#define PLL_REGM_F_SHIFT 0x0
-#define PLL_REGN_MASK 0x000001FE
-#define PLL_REGN_SHIFT 0x1
-#define PLL_SELFREQDCO_MASK 0x0000000E
-#define PLL_SELFREQDCO_SHIFT 0x1
-#define PLL_SD_MASK 0x0003FC00
-#define PLL_SD_SHIFT 0x9
-#define SET_PLL_GO 0x1
-#define PLL_TICOPWDN 0x10000
-#define PLL_LOCK 0x2
-#define PLL_IDLE 0x1
-
-/*
- * This is an Empirical value that works, need to confirm the actual
- * value required for the USB3PHY_PLL_CONFIGURATION2.PLL_IDLE status
- * to be correctly reflected in the USB3PHY_PLL_STATUS register.
- */
-# define PLL_IDLE_TIME 100;
-
-struct usb_dpll_map {
- unsigned long rate;
- struct usb_dpll_params params;
-};
-
-static struct usb_dpll_map dpll_map[] = {
- {12000000, {1250, 5, 4, 20, 0} }, /* 12 MHz */
- {16800000, {3125, 20, 4, 20, 0} }, /* 16.8 MHz */
- {19200000, {1172, 8, 4, 20, 65537} }, /* 19.2 MHz */
- {20000000, {1000, 7, 4, 10, 0} }, /* 20 MHz */
- {26000000, {1250, 12, 4, 20, 0} }, /* 26 MHz */
- {38400000, {3125, 47, 4, 20, 92843} }, /* 38.4 MHz */
-};
-
-static struct usb_dpll_params *omap_usb3_get_dpll_params(unsigned long rate)
-{
- int i;
-
- for (i = 0; i < ARRAY_SIZE(dpll_map); i++) {
- if (rate == dpll_map[i].rate)
- return &dpll_map[i].params;
- }
-
- return NULL;
-}
-
-static int omap_usb3_suspend(struct usb_phy *x, int suspend)
-{
- struct omap_usb *phy = phy_to_omapusb(x);
- int val;
- int timeout = PLL_IDLE_TIME;
-
- if (suspend && !phy->is_suspended) {
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
- val |= PLL_IDLE;
- omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
-
- do {
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_STATUS);
- if (val & PLL_TICOPWDN)
- break;
- udelay(1);
- } while (--timeout);
-
- omap_control_usb3_phy_power(phy->control_dev, 0);
-
- phy->is_suspended = 1;
- } else if (!suspend && phy->is_suspended) {
- phy->is_suspended = 0;
-
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
- val &= ~PLL_IDLE;
- omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
-
- do {
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_STATUS);
- if (!(val & PLL_TICOPWDN))
- break;
- udelay(1);
- } while (--timeout);
- }
-
- return 0;
-}
-
-static void omap_usb_dpll_relock(struct omap_usb *phy)
-{
- u32 val;
- unsigned long timeout;
-
- omap_usb_writel(phy->pll_ctrl_base, PLL_GO, SET_PLL_GO);
-
- timeout = jiffies + msecs_to_jiffies(20);
- do {
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_STATUS);
- if (val & PLL_LOCK)
- break;
- } while (!WARN_ON(time_after(jiffies, timeout)));
-}
-
-static int omap_usb_dpll_lock(struct omap_usb *phy)
-{
- u32 val;
- unsigned long rate;
- struct usb_dpll_params *dpll_params;
-
- rate = clk_get_rate(phy->sys_clk);
- dpll_params = omap_usb3_get_dpll_params(rate);
- if (!dpll_params) {
- dev_err(phy->dev,
- "No DPLL configuration for %lu Hz SYS CLK\n", rate);
- return -EINVAL;
- }
-
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
- val &= ~PLL_REGN_MASK;
- val |= dpll_params->n << PLL_REGN_SHIFT;
- omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
-
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION2);
- val &= ~PLL_SELFREQDCO_MASK;
- val |= dpll_params->freq << PLL_SELFREQDCO_SHIFT;
- omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION2, val);
-
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION1);
- val &= ~PLL_REGM_MASK;
- val |= dpll_params->m << PLL_REGM_SHIFT;
- omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION1, val);
-
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION4);
- val &= ~PLL_REGM_F_MASK;
- val |= dpll_params->mf << PLL_REGM_F_SHIFT;
- omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION4, val);
-
- val = omap_usb_readl(phy->pll_ctrl_base, PLL_CONFIGURATION3);
- val &= ~PLL_SD_MASK;
- val |= dpll_params->sd << PLL_SD_SHIFT;
- omap_usb_writel(phy->pll_ctrl_base, PLL_CONFIGURATION3, val);
-
- omap_usb_dpll_relock(phy);
-
- return 0;
-}
-
-static int omap_usb3_init(struct usb_phy *x)
-{
- struct omap_usb *phy = phy_to_omapusb(x);
- int ret;
-
- ret = omap_usb_dpll_lock(phy);
- if (ret)
- return ret;
-
- omap_control_usb3_phy_power(phy->control_dev, 1);
-
- return 0;
-}
-
-static int omap_usb3_probe(struct platform_device *pdev)
-{
- struct omap_usb *phy;
- struct resource *res;
-
- phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
- if (!phy) {
- dev_err(&pdev->dev, "unable to alloc mem for OMAP USB3 PHY\n");
- return -ENOMEM;
- }
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pll_ctrl");
- phy->pll_ctrl_base = devm_ioremap_resource(&pdev->dev, res);
- if (IS_ERR(phy->pll_ctrl_base))
- return PTR_ERR(phy->pll_ctrl_base);
-
- phy->dev = &pdev->dev;
-
- phy->phy.dev = phy->dev;
- phy->phy.label = "omap-usb3";
- phy->phy.init = omap_usb3_init;
- phy->phy.set_suspend = omap_usb3_suspend;
- phy->phy.type = USB_PHY_TYPE_USB3;
-
- phy->is_suspended = 1;
- phy->wkupclk = devm_clk_get(phy->dev, "usb_phy_cm_clk32k");
- if (IS_ERR(phy->wkupclk)) {
- dev_err(&pdev->dev, "unable to get usb_phy_cm_clk32k\n");
- return PTR_ERR(phy->wkupclk);
- }
- clk_prepare(phy->wkupclk);
-
- phy->optclk = devm_clk_get(phy->dev, "usb_otg_ss_refclk960m");
- if (IS_ERR(phy->optclk)) {
- dev_err(&pdev->dev, "unable to get usb_otg_ss_refclk960m\n");
- return PTR_ERR(phy->optclk);
- }
- clk_prepare(phy->optclk);
-
- phy->sys_clk = devm_clk_get(phy->dev, "sys_clkin");
- if (IS_ERR(phy->sys_clk)) {
- pr_err("%s: unable to get sys_clkin\n", __func__);
- return -EINVAL;
- }
-
- phy->control_dev = omap_get_control_dev();
- if (IS_ERR(phy->control_dev)) {
- dev_dbg(&pdev->dev, "Failed to get control device\n");
- return -ENODEV;
- }
-
- omap_control_usb3_phy_power(phy->control_dev, 0);
- usb_add_phy_dev(&phy->phy);
-
- platform_set_drvdata(pdev, phy);
-
- pm_runtime_enable(phy->dev);
- pm_runtime_get(&pdev->dev);
-
- return 0;
-}
-
-static int omap_usb3_remove(struct platform_device *pdev)
-{
- struct omap_usb *phy = platform_get_drvdata(pdev);
-
- clk_unprepare(phy->wkupclk);
- clk_unprepare(phy->optclk);
- usb_remove_phy(&phy->phy);
- if (!pm_runtime_suspended(&pdev->dev))
- pm_runtime_put(&pdev->dev);
- pm_runtime_disable(&pdev->dev);
-
- return 0;
-}
-
-#ifdef CONFIG_PM_RUNTIME
-
-static int omap_usb3_runtime_suspend(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct omap_usb *phy = platform_get_drvdata(pdev);
-
- clk_disable(phy->wkupclk);
- clk_disable(phy->optclk);
-
- return 0;
-}
-
-static int omap_usb3_runtime_resume(struct device *dev)
-{
- u32 ret = 0;
- struct platform_device *pdev = to_platform_device(dev);
- struct omap_usb *phy = platform_get_drvdata(pdev);
-
- ret = clk_enable(phy->optclk);
- if (ret) {
- dev_err(phy->dev, "Failed to enable optclk %d\n", ret);
- goto err1;
- }
-
- ret = clk_enable(phy->wkupclk);
- if (ret) {
- dev_err(phy->dev, "Failed to enable wkupclk %d\n", ret);
- goto err2;
- }
-
- return 0;
-
-err2:
- clk_disable(phy->optclk);
-
-err1:
- return ret;
-}
-
-static const struct dev_pm_ops omap_usb3_pm_ops = {
- SET_RUNTIME_PM_OPS(omap_usb3_runtime_suspend, omap_usb3_runtime_resume,
- NULL)
-};
-
-#define DEV_PM_OPS (&omap_usb3_pm_ops)
-#else
-#define DEV_PM_OPS NULL
-#endif
-
-#ifdef CONFIG_OF
-static const struct of_device_id omap_usb3_id_table[] = {
- { .compatible = "ti,omap-usb3" },
- {}
-};
-MODULE_DEVICE_TABLE(of, omap_usb3_id_table);
-#endif
-
-static struct platform_driver omap_usb3_driver = {
- .probe = omap_usb3_probe,
- .remove = omap_usb3_remove,
- .driver = {
- .name = "omap-usb3",
- .owner = THIS_MODULE,
- .pm = DEV_PM_OPS,
- .of_match_table = of_match_ptr(omap_usb3_id_table),
- },
-};
-
-module_platform_driver(omap_usb3_driver);
-
-MODULE_ALIAS("platform: omap_usb3");
-MODULE_AUTHOR("Texas Instruments Inc.");
-MODULE_DESCRIPTION("OMAP USB3 phy driver");
-MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:30:31 +0000