forked from Minki/linux
mfd: omap-usb-tll: Move configuration code to omap_tll_init()
This is because we want to get rid of platform_data usage from probe(). The only information we need is PORT_MODE, and this can be supplied to us by the user (i.e. omap-usb-host.c). We also move channel clock management from runtime PM handlers into omap_tll_enable/disable(). Signed-off-by: Roger Quadros <rogerq@ti.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Roger Quadros
Samuel Ortiz
parent
662e469e91
commit
9f4a3ece05
@ -278,7 +278,7 @@ static int usbhs_runtime_resume(struct device *dev)
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dev_dbg(dev, "usbhs_runtime_resume\n");
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omap_tll_enable();
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omap_tll_enable(pdata);
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if (!IS_ERR(omap->ehci_logic_fck))
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clk_enable(omap->ehci_logic_fck);
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@ -353,7 +353,7 @@ static int usbhs_runtime_suspend(struct device *dev)
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if (!IS_ERR(omap->ehci_logic_fck))
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clk_disable(omap->ehci_logic_fck);
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omap_tll_disable();
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omap_tll_disable(pdata);
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return 0;
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}
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@ -527,6 +527,9 @@ static int usbhs_omap_probe(struct platform_device *pdev)
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omap->pdata = pdata;
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/* Initialize the TLL subsystem */
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omap_tll_init(pdata);
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pm_runtime_enable(dev);
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platform_set_drvdata(pdev, omap);
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@ -1,8 +1,9 @@
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/**
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* omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
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*
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* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
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* Copyright (C) 2012-2013 Texas Instruments Incorporated - http://www.ti.com
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* Author: Keshava Munegowda <keshava_mgowda@ti.com>
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* Author: Roger Quadros <rogerq@ti.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 of
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@ -105,8 +106,8 @@
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struct usbtll_omap {
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int nch; /* num. of channels */
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struct usbhs_omap_platform_data *pdata;
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struct clk **ch_clk;
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void __iomem *base;
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};
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/*-------------------------------------------------------------------------*/
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@ -210,14 +211,10 @@ static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
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static int usbtll_omap_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct usbhs_omap_platform_data *pdata = dev->platform_data;
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void __iomem *base;
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struct resource *res;
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struct usbtll_omap *tll;
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unsigned reg;
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int ret = 0;
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int i, ver;
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bool needs_tll;
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dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
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@ -227,16 +224,9 @@ static int usbtll_omap_probe(struct platform_device *pdev)
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return -ENOMEM;
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}
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if (!pdata) {
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dev_err(dev, "Platform data missing\n");
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return -ENODEV;
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}
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tll->pdata = pdata;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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base = devm_request_and_ioremap(dev, res);
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if (!base) {
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tll->base = devm_request_and_ioremap(dev, res);
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if (!tll->base) {
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ret = -EADDRNOTAVAIL;
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dev_err(dev, "Resource request/ioremap failed:%d\n", ret);
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return ret;
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@ -246,7 +236,7 @@ static int usbtll_omap_probe(struct platform_device *pdev)
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pm_runtime_enable(dev);
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pm_runtime_get_sync(dev);
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ver = usbtll_read(base, OMAP_USBTLL_REVISION);
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ver = usbtll_read(tll->base, OMAP_USBTLL_REVISION);
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switch (ver) {
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case OMAP_USBTLL_REV1:
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case OMAP_USBTLL_REV4:
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@ -283,11 +273,77 @@ static int usbtll_omap_probe(struct platform_device *pdev)
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dev_dbg(dev, "can't get clock : %s\n", clkname);
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}
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pm_runtime_put_sync(dev);
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/* only after this can omap_tll_enable/disable work */
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spin_lock(&tll_lock);
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tll_dev = dev;
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spin_unlock(&tll_lock);
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return 0;
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err_clk_alloc:
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pm_runtime_put_sync(dev);
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pm_runtime_disable(dev);
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return ret;
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}
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/**
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* usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
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* @pdev: USB Host Controller being removed
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*
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* Reverses the effect of usbtll_omap_probe().
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*/
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static int usbtll_omap_remove(struct platform_device *pdev)
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{
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struct usbtll_omap *tll = platform_get_drvdata(pdev);
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int i;
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spin_lock(&tll_lock);
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tll_dev = NULL;
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spin_unlock(&tll_lock);
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for (i = 0; i < tll->nch; i++)
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if (!IS_ERR(tll->ch_clk[i]))
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clk_put(tll->ch_clk[i]);
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pm_runtime_disable(&pdev->dev);
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return 0;
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}
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static struct platform_driver usbtll_omap_driver = {
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.driver = {
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.name = (char *)usbtll_driver_name,
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.owner = THIS_MODULE,
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},
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.probe = usbtll_omap_probe,
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.remove = usbtll_omap_remove,
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};
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int omap_tll_init(struct usbhs_omap_platform_data *pdata)
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{
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int i;
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bool needs_tll;
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unsigned reg;
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struct usbtll_omap *tll;
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spin_lock(&tll_lock);
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if (!tll_dev) {
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spin_unlock(&tll_lock);
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return -ENODEV;
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}
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tll = dev_get_drvdata(tll_dev);
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needs_tll = false;
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for (i = 0; i < tll->nch; i++)
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needs_tll |= omap_usb_mode_needs_tll(pdata->port_mode[i]);
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pm_runtime_get_sync(tll_dev);
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if (needs_tll) {
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void __iomem *base = tll->base;
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/* Program Common TLL register */
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reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
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@ -336,51 +392,29 @@ static int usbtll_omap_probe(struct platform_device *pdev)
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}
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}
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pm_runtime_put_sync(dev);
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/* only after this can omap_tll_enable/disable work */
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spin_lock(&tll_lock);
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tll_dev = dev;
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pm_runtime_put_sync(tll_dev);
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spin_unlock(&tll_lock);
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return 0;
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err_clk_alloc:
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pm_runtime_put_sync(dev);
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pm_runtime_disable(dev);
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return ret;
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}
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EXPORT_SYMBOL_GPL(omap_tll_init);
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/**
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* usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
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* @pdev: USB Host Controller being removed
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*
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* Reverses the effect of usbtll_omap_probe().
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*/
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static int usbtll_omap_remove(struct platform_device *pdev)
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int omap_tll_enable(struct usbhs_omap_platform_data *pdata)
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{
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struct usbtll_omap *tll = platform_get_drvdata(pdev);
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int i;
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struct usbtll_omap *tll;
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spin_lock(&tll_lock);
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tll_dev = NULL;
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spin_unlock(&tll_lock);
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for (i = 0; i < tll->nch; i++)
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if (!IS_ERR(tll->ch_clk[i]))
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clk_put(tll->ch_clk[i]);
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if (!tll_dev) {
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spin_unlock(&tll_lock);
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return -ENODEV;
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}
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pm_runtime_disable(&pdev->dev);
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return 0;
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}
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tll = dev_get_drvdata(tll_dev);
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static int usbtll_runtime_resume(struct device *dev)
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{
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struct usbtll_omap *tll = dev_get_drvdata(dev);
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struct usbhs_omap_platform_data *pdata = tll->pdata;
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int i;
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dev_dbg(dev, "usbtll_runtime_resume\n");
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pm_runtime_get_sync(tll_dev);
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for (i = 0; i < tll->nch; i++) {
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if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
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@ -391,22 +425,31 @@ static int usbtll_runtime_resume(struct device *dev)
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r = clk_enable(tll->ch_clk[i]);
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if (r) {
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dev_err(dev,
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dev_err(tll_dev,
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"Error enabling ch %d clock: %d\n", i, r);
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}
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}
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}
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spin_unlock(&tll_lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(omap_tll_enable);
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static int usbtll_runtime_suspend(struct device *dev)
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int omap_tll_disable(struct usbhs_omap_platform_data *pdata)
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{
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struct usbtll_omap *tll = dev_get_drvdata(dev);
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struct usbhs_omap_platform_data *pdata = tll->pdata;
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int i;
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struct usbtll_omap *tll;
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dev_dbg(dev, "usbtll_runtime_suspend\n");
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spin_lock(&tll_lock);
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if (!tll_dev) {
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spin_unlock(&tll_lock);
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return -ENODEV;
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}
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tll = dev_get_drvdata(tll_dev);
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for (i = 0; i < tll->nch; i++) {
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if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
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@ -415,61 +458,12 @@ static int usbtll_runtime_suspend(struct device *dev)
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}
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}
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pm_runtime_put_sync(tll_dev);
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spin_unlock(&tll_lock);
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return 0;
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}
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static const struct dev_pm_ops usbtllomap_dev_pm_ops = {
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SET_RUNTIME_PM_OPS(usbtll_runtime_suspend,
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usbtll_runtime_resume,
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NULL)
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};
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static struct platform_driver usbtll_omap_driver = {
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.driver = {
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.name = (char *)usbtll_driver_name,
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.owner = THIS_MODULE,
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.pm = &usbtllomap_dev_pm_ops,
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},
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.probe = usbtll_omap_probe,
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.remove = usbtll_omap_remove,
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};
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int omap_tll_enable(void)
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{
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int ret;
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spin_lock(&tll_lock);
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if (!tll_dev) {
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pr_err("%s: OMAP USB TLL not initialized\n", __func__);
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ret = -ENODEV;
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} else {
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ret = pm_runtime_get_sync(tll_dev);
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}
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spin_unlock(&tll_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(omap_tll_enable);
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int omap_tll_disable(void)
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{
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int ret;
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spin_lock(&tll_lock);
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if (!tll_dev) {
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pr_err("%s: OMAP USB TLL not initialized\n", __func__);
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ret = -ENODEV;
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} else {
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ret = pm_runtime_put_sync(tll_dev);
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}
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spin_unlock(&tll_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(omap_tll_disable);
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MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
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@ -1,2 +1,3 @@
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extern int omap_tll_enable(void);
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extern int omap_tll_disable(void);
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extern int omap_tll_init(struct usbhs_omap_platform_data *pdata);
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extern int omap_tll_enable(struct usbhs_omap_platform_data *pdata);
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extern int omap_tll_disable(struct usbhs_omap_platform_data *pdata);
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