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path: root/drivers/mfd/omap-usb-tll.c
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Diffstat (limited to 'drivers/mfd/omap-usb-tll.c')
-rw-r--r--drivers/mfd/omap-usb-tll.c219
1 files changed, 110 insertions, 109 deletions
diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index 0aef1a76888..e59ac4cbac9 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -1,8 +1,9 @@
/**
* omap-usb-tll.c - The USB TLL driver for OMAP EHCI & OHCI
*
- * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
+ * Copyright (C) 2012-2013 Texas Instruments Incorporated - http://www.ti.com
* Author: Keshava Munegowda <keshava_mgowda@ti.com>
+ * Author: Roger Quadros <rogerq@ti.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 of
@@ -27,6 +28,7 @@
#include <linux/err.h>
#include <linux/pm_runtime.h>
#include <linux/platform_data/usb-omap.h>
+#include <linux/of.h>
#define USBTLL_DRIVER_NAME "usbhs_tll"
@@ -105,8 +107,8 @@
struct usbtll_omap {
int nch; /* num. of channels */
- struct usbhs_omap_platform_data *pdata;
struct clk **ch_clk;
+ void __iomem *base;
};
/*-------------------------------------------------------------------------*/
@@ -210,14 +212,10 @@ static unsigned ohci_omap3_fslsmode(enum usbhs_omap_port_mode mode)
static int usbtll_omap_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct usbhs_omap_platform_data *pdata = dev->platform_data;
- void __iomem *base;
struct resource *res;
struct usbtll_omap *tll;
- unsigned reg;
int ret = 0;
int i, ver;
- bool needs_tll;
dev_dbg(dev, "starting TI HSUSB TLL Controller\n");
@@ -227,26 +225,16 @@ static int usbtll_omap_probe(struct platform_device *pdev)
return -ENOMEM;
}
- if (!pdata) {
- dev_err(dev, "Platform data missing\n");
- return -ENODEV;
- }
-
- tll->pdata = pdata;
-
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- base = devm_request_and_ioremap(dev, res);
- if (!base) {
- ret = -EADDRNOTAVAIL;
- dev_err(dev, "Resource request/ioremap failed:%d\n", ret);
- return ret;
- }
+ tll->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(tll->base))
+ return PTR_ERR(tll->base);
platform_set_drvdata(pdev, tll);
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
- ver = usbtll_read(base, OMAP_USBTLL_REVISION);
+ ver = usbtll_read(tll->base, OMAP_USBTLL_REVISION);
switch (ver) {
case OMAP_USBTLL_REV1:
case OMAP_USBTLL_REV4:
@@ -283,11 +271,85 @@ static int usbtll_omap_probe(struct platform_device *pdev)
dev_dbg(dev, "can't get clock : %s\n", clkname);
}
+ pm_runtime_put_sync(dev);
+ /* only after this can omap_tll_enable/disable work */
+ spin_lock(&tll_lock);
+ tll_dev = dev;
+ spin_unlock(&tll_lock);
+
+ return 0;
+
+err_clk_alloc:
+ pm_runtime_put_sync(dev);
+ pm_runtime_disable(dev);
+
+ return ret;
+}
+
+/**
+ * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
+ * @pdev: USB Host Controller being removed
+ *
+ * Reverses the effect of usbtll_omap_probe().
+ */
+static int usbtll_omap_remove(struct platform_device *pdev)
+{
+ struct usbtll_omap *tll = platform_get_drvdata(pdev);
+ int i;
+
+ spin_lock(&tll_lock);
+ tll_dev = NULL;
+ spin_unlock(&tll_lock);
+
+ for (i = 0; i < tll->nch; i++)
+ if (!IS_ERR(tll->ch_clk[i]))
+ clk_put(tll->ch_clk[i]);
+
+ pm_runtime_disable(&pdev->dev);
+ return 0;
+}
+
+static const struct of_device_id usbtll_omap_dt_ids[] = {
+ { .compatible = "ti,usbhs-tll" },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, usbtll_omap_dt_ids);
+
+static struct platform_driver usbtll_omap_driver = {
+ .driver = {
+ .name = (char *)usbtll_driver_name,
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(usbtll_omap_dt_ids),
+ },
+ .probe = usbtll_omap_probe,
+ .remove = usbtll_omap_remove,
+};
+
+int omap_tll_init(struct usbhs_omap_platform_data *pdata)
+{
+ int i;
+ bool needs_tll;
+ unsigned reg;
+ struct usbtll_omap *tll;
+
+ spin_lock(&tll_lock);
+
+ if (!tll_dev) {
+ spin_unlock(&tll_lock);
+ return -ENODEV;
+ }
+
+ tll = dev_get_drvdata(tll_dev);
+
needs_tll = false;
for (i = 0; i < tll->nch; i++)
needs_tll |= omap_usb_mode_needs_tll(pdata->port_mode[i]);
+ pm_runtime_get_sync(tll_dev);
+
if (needs_tll) {
+ void __iomem *base = tll->base;
/* Program Common TLL register */
reg = usbtll_read(base, OMAP_TLL_SHARED_CONF);
@@ -336,51 +398,29 @@ static int usbtll_omap_probe(struct platform_device *pdev)
}
}
- pm_runtime_put_sync(dev);
- /* only after this can omap_tll_enable/disable work */
- spin_lock(&tll_lock);
- tll_dev = dev;
+ pm_runtime_put_sync(tll_dev);
+
spin_unlock(&tll_lock);
return 0;
-
-err_clk_alloc:
- pm_runtime_put_sync(dev);
- pm_runtime_disable(dev);
-
- return ret;
}
+EXPORT_SYMBOL_GPL(omap_tll_init);
-/**
- * usbtll_omap_remove - shutdown processing for UHH & TLL HCDs
- * @pdev: USB Host Controller being removed
- *
- * Reverses the effect of usbtll_omap_probe().
- */
-static int usbtll_omap_remove(struct platform_device *pdev)
+int omap_tll_enable(struct usbhs_omap_platform_data *pdata)
{
- struct usbtll_omap *tll = platform_get_drvdata(pdev);
int i;
+ struct usbtll_omap *tll;
spin_lock(&tll_lock);
- tll_dev = NULL;
- spin_unlock(&tll_lock);
- for (i = 0; i < tll->nch; i++)
- if (!IS_ERR(tll->ch_clk[i]))
- clk_put(tll->ch_clk[i]);
-
- pm_runtime_disable(&pdev->dev);
- return 0;
-}
+ if (!tll_dev) {
+ spin_unlock(&tll_lock);
+ return -ENODEV;
+ }
-static int usbtll_runtime_resume(struct device *dev)
-{
- struct usbtll_omap *tll = dev_get_drvdata(dev);
- struct usbhs_omap_platform_data *pdata = tll->pdata;
- int i;
+ tll = dev_get_drvdata(tll_dev);
- dev_dbg(dev, "usbtll_runtime_resume\n");
+ pm_runtime_get_sync(tll_dev);
for (i = 0; i < tll->nch; i++) {
if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
@@ -391,22 +431,31 @@ static int usbtll_runtime_resume(struct device *dev)
r = clk_enable(tll->ch_clk[i]);
if (r) {
- dev_err(dev,
+ dev_err(tll_dev,
"Error enabling ch %d clock: %d\n", i, r);
}
}
}
+ spin_unlock(&tll_lock);
+
return 0;
}
+EXPORT_SYMBOL_GPL(omap_tll_enable);
-static int usbtll_runtime_suspend(struct device *dev)
+int omap_tll_disable(struct usbhs_omap_platform_data *pdata)
{
- struct usbtll_omap *tll = dev_get_drvdata(dev);
- struct usbhs_omap_platform_data *pdata = tll->pdata;
int i;
+ struct usbtll_omap *tll;
- dev_dbg(dev, "usbtll_runtime_suspend\n");
+ spin_lock(&tll_lock);
+
+ if (!tll_dev) {
+ spin_unlock(&tll_lock);
+ return -ENODEV;
+ }
+
+ tll = dev_get_drvdata(tll_dev);
for (i = 0; i < tll->nch; i++) {
if (omap_usb_mode_needs_tll(pdata->port_mode[i])) {
@@ -415,64 +464,16 @@ static int usbtll_runtime_suspend(struct device *dev)
}
}
- return 0;
-}
-
-static const struct dev_pm_ops usbtllomap_dev_pm_ops = {
- SET_RUNTIME_PM_OPS(usbtll_runtime_suspend,
- usbtll_runtime_resume,
- NULL)
-};
-
-static struct platform_driver usbtll_omap_driver = {
- .driver = {
- .name = (char *)usbtll_driver_name,
- .owner = THIS_MODULE,
- .pm = &usbtllomap_dev_pm_ops,
- },
- .probe = usbtll_omap_probe,
- .remove = usbtll_omap_remove,
-};
-
-int omap_tll_enable(void)
-{
- int ret;
-
- spin_lock(&tll_lock);
-
- if (!tll_dev) {
- pr_err("%s: OMAP USB TLL not initialized\n", __func__);
- ret = -ENODEV;
- } else {
- ret = pm_runtime_get_sync(tll_dev);
- }
-
- spin_unlock(&tll_lock);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(omap_tll_enable);
-
-int omap_tll_disable(void)
-{
- int ret;
-
- spin_lock(&tll_lock);
-
- if (!tll_dev) {
- pr_err("%s: OMAP USB TLL not initialized\n", __func__);
- ret = -ENODEV;
- } else {
- ret = pm_runtime_put_sync(tll_dev);
- }
+ pm_runtime_put_sync(tll_dev);
spin_unlock(&tll_lock);
- return ret;
+ return 0;
}
EXPORT_SYMBOL_GPL(omap_tll_disable);
MODULE_AUTHOR("Keshava Munegowda <keshava_mgowda@ti.com>");
+MODULE_AUTHOR("Roger Quadros <rogerq@ti.com>");
MODULE_ALIAS("platform:" USBHS_DRIVER_NAME);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("usb tll driver for TI OMAP EHCI and OHCI controllers");
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-19 00:10:51 +0000