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usb: otg: make twl6030_usb as a comparator driver to omap_usb2 

All the PHY configuration other than VBUS, ID GND and OTG SRP are removed
from twl6030. The phy configurations are taken care by the dedicated
usb2 phy driver. So twl6030 is made as comparator driver for VBUS and
ID detection.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Kishon Vijay Abraham I 2012-09-06 20:27:07 +05:30 committed by Felipe Balbi
parent 657b306a7b
commit 0e98de67ba
2 changed files with 19 additions and 101 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/otg/Kconfig
View File

@ -68,7 +68,7 @@ config TWL4030_USB
config TWL6030_USB
tristate "TWL6030 USB Transceiver Driver"
depends on TWL4030_CORE
depends on TWL4030_CORE && OMAP_USB2
select USB_OTG_UTILS
help
Enable this to support the USB OTG transceiver on TWL6030

118
drivers/usb/otg/twl6030-usb.c
View File

@ -25,8 +25,9 @@
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <linux/usb/otg.h>
#include <linux/usb/musb-omap.h>
#include <linux/usb/phy_companion.h>
#include <linux/usb/omap_usb.h>
#include <linux/i2c/twl.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
@ -87,7 +88,7 @@
#define VBUS_DET BIT(2)
struct twl6030_usb {
struct usb_phy phy;
struct phy_companion comparator;
struct device *dev;
/* for vbus reporting with irqs disabled */
@ -107,7 +108,7 @@ struct twl6030_usb {
unsigned long features;
};
#define phy_to_twl(x) container_of((x), struct twl6030_usb, phy)
#define comparator_to_twl(x) container_of((x), struct twl6030_usb, comparator)
/*-------------------------------------------------------------------------*/
@ -137,50 +138,9 @@ static inline u8 twl6030_readb(struct twl6030_usb *twl, u8 module, u8 address)
return ret;
}
static int twl6030_phy_init(struct usb_phy *x)
static int twl6030_start_srp(struct phy_companion *comparator)
{
struct twl6030_usb *twl;
struct device *dev;
struct twl4030_usb_data *pdata;
twl = phy_to_twl(x);
dev = twl->dev;
pdata = dev->platform_data;
if (twl->linkstat == OMAP_MUSB_ID_GROUND)
pdata->phy_power(twl->dev, 1, 1);
else
pdata->phy_power(twl->dev, 0, 1);
return 0;
}
static void twl6030_phy_shutdown(struct usb_phy *x)
{
struct twl6030_usb *twl;
struct device *dev;
struct twl4030_usb_data *pdata;
twl = phy_to_twl(x);
dev = twl->dev;
pdata = dev->platform_data;
pdata->phy_power(twl->dev, 0, 0);
}
static int twl6030_phy_suspend(struct usb_phy *x, int suspend)
{
struct twl6030_usb *twl = phy_to_twl(x);
struct device *dev = twl->dev;
struct twl4030_usb_data *pdata = dev->platform_data;
pdata->phy_suspend(dev, suspend);
return 0;
}
static int twl6030_start_srp(struct usb_otg *otg)
{
struct twl6030_usb *twl = phy_to_twl(otg->phy);
struct twl6030_usb *twl = comparator_to_twl(comparator);
twl6030_writeb(twl, TWL_MODULE_USB, 0x24, USB_VBUS_CTRL_SET);
twl6030_writeb(twl, TWL_MODULE_USB, 0x84, USB_VBUS_CTRL_SET);
@ -313,23 +273,8 @@ static irqreturn_t twl6030_usbotg_irq(int irq, void *_twl)
return IRQ_HANDLED;
}
static int twl6030_set_peripheral(struct usb_otg *otg,
struct usb_gadget *gadget)
static int twl6030_enable_irq(struct twl6030_usb *twl)
{
if (!otg)
return -ENODEV;
otg->gadget = gadget;
if (!gadget)
otg->phy->state = OTG_STATE_UNDEFINED;
return 0;
}
static int twl6030_enable_irq(struct usb_phy *x)
{
struct twl6030_usb *twl = phy_to_twl(x);
twl6030_writeb(twl, TWL_MODULE_USB, 0x1, USB_ID_INT_EN_HI_SET);
twl6030_interrupt_unmask(0x05, REG_INT_MSK_LINE_C);
twl6030_interrupt_unmask(0x05, REG_INT_MSK_STS_C);
@ -362,9 +307,9 @@ static void otg_set_vbus_work(struct work_struct *data)
CHARGERUSB_CTRL1);
}
static int twl6030_set_vbus(struct usb_otg *otg, bool enabled)
static int twl6030_set_vbus(struct phy_companion *comparator, bool enabled)
{
struct twl6030_usb *twl = phy_to_twl(otg->phy);
struct twl6030_usb *twl = comparator_to_twl(comparator);
twl->vbus_enable = enabled;
schedule_work(&twl->set_vbus_work);
@ -372,23 +317,12 @@ static int twl6030_set_vbus(struct usb_otg *otg, bool enabled)
return 0;
}
static int twl6030_set_host(struct usb_otg *otg, struct usb_bus *host)
{
if (!otg)
return -ENODEV;
otg->host = host;
if (!host)
otg->phy->state = OTG_STATE_UNDEFINED;
return 0;
}
static int __devinit twl6030_usb_probe(struct platform_device *pdev)
{
u32 ret;
struct twl6030_usb *twl;
int status, err;
struct twl4030_usb_data *pdata;
struct usb_otg *otg;
struct device *dev = &pdev->dev;
pdata = dev->platform_data;
@ -396,28 +330,20 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev)
if (!twl)
return -ENOMEM;
otg = devm_kzalloc(dev, sizeof *otg, GFP_KERNEL);
if (!otg)
return -ENOMEM;
twl->dev = &pdev->dev;
twl->irq1 = platform_get_irq(pdev, 0);
twl->irq2 = platform_get_irq(pdev, 1);
twl->features = pdata->features;
twl->linkstat = OMAP_MUSB_UNKNOWN;
twl->phy.dev = twl->dev;
twl->phy.label = "twl6030";
twl->phy.otg = otg;
twl->phy.init = twl6030_phy_init;
twl->phy.shutdown = twl6030_phy_shutdown;
twl->phy.set_suspend = twl6030_phy_suspend;
twl->comparator.set_vbus = twl6030_set_vbus;
twl->comparator.start_srp = twl6030_start_srp;
otg->phy = &twl->phy;
otg->set_host = twl6030_set_host;
otg->set_peripheral = twl6030_set_peripheral;
otg->set_vbus = twl6030_set_vbus;
otg->start_srp = twl6030_start_srp;
ret = omap_usb2_set_comparator(&twl->comparator);
if (ret == -ENODEV) {
dev_info(&pdev->dev, "phy not ready, deferring probe");
return -EPROBE_DEFER;
}
/* init spinlock for workqueue */
spin_lock_init(&twl->lock);
@ -427,7 +353,6 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "ldo init failed\n");
return err;
}
usb_add_phy(&twl->phy, USB_PHY_TYPE_USB2);
platform_set_drvdata(pdev, twl);
if (device_create_file(&pdev->dev, &dev_attr_vbus))
@ -458,9 +383,7 @@ static int __devinit twl6030_usb_probe(struct platform_device *pdev)
}
twl->asleep = 0;
pdata->phy_init(dev);
twl6030_phy_suspend(&twl->phy, 0);
twl6030_enable_irq(&twl->phy);
twl6030_enable_irq(twl);
dev_info(&pdev->dev, "Initialized TWL6030 USB module\n");
return 0;
@ -470,10 +393,6 @@ static int __exit twl6030_usb_remove(struct platform_device *pdev)
{
struct twl6030_usb *twl = platform_get_drvdata(pdev);
struct twl4030_usb_data *pdata;
struct device *dev = &pdev->dev;
pdata = dev->platform_data;
twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
REG_INT_MSK_LINE_C);
twl6030_interrupt_mask(TWL6030_USBOTG_INT_MASK,
@ -481,7 +400,6 @@ static int __exit twl6030_usb_remove(struct platform_device *pdev)
free_irq(twl->irq1, twl);
free_irq(twl->irq2, twl);
regulator_put(twl->usb3v3);
pdata->phy_exit(twl->dev);
device_remove_file(twl->dev, &dev_attr_vbus);
cancel_work_sync(&twl->set_vbus_work);