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usb: start using the control module driver

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Start using the control module driver for powering on the PHY and for
writing to the mailbox instead of writing to the control module
registers on their own.

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 2013-01-25 15:54:00 +05:30 committed by Felipe Balbi
parent 01658f0f8d
commit ca784be36c
8 changed files with 40 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/devicetree/bindings/usb/omap-usb.txt
View File

@ -3,6 +3,9 @@ OMAP GLUE AND OTHER OMAP SPECIFIC COMPONENTS
OMAP MUSB GLUE
- compatible : Should be "ti,omap4-musb" or "ti,omap3-musb"
- ti,hwmods : must be "usb_otg_hs"
- ti,has-mailbox : to specify that omap uses an external mailbox
(in control module) to communicate with the musb core during device connect
and disconnect.
- multipoint : Should be "1" indicating the musb controller supports
multipoint. This is a MUSB configuration-specific setting.
- num_eps : Specifies the number of endpoints. This is also a
@ -24,6 +27,7 @@ SOC specific device node entry
usb_otg_hs: usb_otg_hs@4a0ab000 {
compatible = "ti,omap4-musb";
ti,hwmods = "usb_otg_hs";
ti,has-mailbox;
multipoint = <1>;
num_eps = <16>;
ram_bits = <12>;

7
Documentation/devicetree/bindings/usb/usb-phy.txt
View File

@ -4,9 +4,7 @@ OMAP USB2 PHY
Required properties:
- compatible: Should be "ti,omap-usb2"
- reg : Address and length of the register set for the device. Also
add the address of control module dev conf register until a driver for
control module is added
- reg : Address and length of the register set for the device.
Optional properties:
- ctrl-module : phandle of the control module used by PHY driver to power on
@ -16,7 +14,6 @@ This is usually a subnode of ocp2scp to which it is connected.
usb2phy@4a0ad080 {
compatible = "ti,omap-usb2";
reg = <0x4a0ad080 0x58>,
<0x4a002300 0x4>;
reg = <0x4a0ad080 0x58>;
ctrl-module = <&omap_control_usb>;
};

1
drivers/usb/musb/Kconfig
View File

@ -11,6 +11,7 @@ config USB_MUSB_HDRC
select NOP_USB_XCEIV if (SOC_TI81XX || SOC_AM33XX)
select TWL4030_USB if MACH_OMAP_3430SDP
select TWL6030_USB if MACH_OMAP_4430SDP || MACH_OMAP4_PANDA
select OMAP_CONTROL_USB if MACH_OMAP_4430SDP || MACH_OMAP4_PANDA
select USB_OTG_UTILS
help
Say Y here if your system has a dual role high speed USB

68
drivers/usb/musb/omap2430.c
View File

@ -37,6 +37,7 @@
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/usb/musb-omap.h>
#include <linux/usb/omap_control_usb.h>
#include "musb_core.h"
#include "omap2430.h"
@ -46,7 +47,7 @@ struct omap2430_glue {
struct platform_device *musb;
enum omap_musb_vbus_id_status status;
struct work_struct omap_musb_mailbox_work;
u32 __iomem *control_otghs;
struct device *control_otghs;
};
#define glue_to_musb(g) platform_get_drvdata(g->musb)
@ -54,26 +55,6 @@ struct omap2430_glue *_glue;
static struct timer_list musb_idle_timer;
/**
* omap4_usb_phy_mailbox - write to usb otg mailbox
* @glue: struct omap2430_glue *
* @val: the value to be written to the mailbox
*
* On detection of a device (ID pin is grounded), this API should be called
* to set AVALID, VBUSVALID and ID pin is grounded.
*
* When OMAP is connected to a host (OMAP in device mode), this API
* is called to set AVALID, VBUSVALID and ID pin in high impedance.
*
* XXX: This function will be removed once we have a seperate driver for
* control module
*/
static void omap4_usb_phy_mailbox(struct omap2430_glue *glue, u32 val)
{
if (glue->control_otghs)
writel(val, glue->control_otghs);
}
static void musb_do_idle(unsigned long _musb)
{
struct musb *musb = (void *)_musb;
@ -269,7 +250,6 @@ EXPORT_SYMBOL_GPL(omap_musb_mailbox);
static void omap_musb_set_mailbox(struct omap2430_glue *glue)
{
u32 val;
struct musb *musb = glue_to_musb(glue);
struct device *dev = musb->controller;
struct musb_hdrc_platform_data *pdata = dev->platform_data;
@ -285,8 +265,8 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue)
musb->xceiv->last_event = USB_EVENT_ID;
if (musb->gadget_driver) {
pm_runtime_get_sync(dev);
val = AVALID | VBUSVALID;
omap4_usb_phy_mailbox(glue, val);
omap_control_usb_set_mode(glue->control_otghs,
USB_MODE_HOST);
omap2430_musb_set_vbus(musb, 1);
}
break;
@ -299,8 +279,7 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue)
musb->xceiv->last_event = USB_EVENT_VBUS;
if (musb->gadget_driver)
pm_runtime_get_sync(dev);
val = IDDIG | AVALID | VBUSVALID;
omap4_usb_phy_mailbox(glue, val);
omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
break;
case OMAP_MUSB_ID_FLOAT:
@ -317,8 +296,8 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue)
if (musb->xceiv->otg->set_vbus)
otg_set_vbus(musb->xceiv->otg, 0);
}
val = SESSEND | IDDIG;
omap4_usb_phy_mailbox(glue, val);
omap_control_usb_set_mode(glue->control_otghs,
USB_MODE_DISCONNECT);
break;
default:
dev_dbg(dev, "ID float\n");
@ -415,7 +394,6 @@ err1:
static void omap2430_musb_enable(struct musb *musb)
{
u8 devctl;
u32 val;
unsigned long timeout = jiffies + msecs_to_jiffies(1000);
struct device *dev = musb->controller;
struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
@ -425,8 +403,7 @@ static void omap2430_musb_enable(struct musb *musb)
switch (glue->status) {
case OMAP_MUSB_ID_GROUND:
val = AVALID | VBUSVALID;
omap4_usb_phy_mailbox(glue, val);
omap_control_usb_set_mode(glue->control_otghs, USB_MODE_HOST);
if (data->interface_type != MUSB_INTERFACE_UTMI)
break;
devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
@ -445,8 +422,7 @@ static void omap2430_musb_enable(struct musb *musb)
break;
case OMAP_MUSB_VBUS_VALID:
val = IDDIG | AVALID | VBUSVALID;
omap4_usb_phy_mailbox(glue, val);
omap_control_usb_set_mode(glue->control_otghs, USB_MODE_DEVICE);
break;
default:
@ -456,14 +432,12 @@ static void omap2430_musb_enable(struct musb *musb)
static void omap2430_musb_disable(struct musb *musb)
{
u32 val;
struct device *dev = musb->controller;
struct omap2430_glue *glue = dev_get_drvdata(dev->parent);
if (glue->status != OMAP_MUSB_UNKNOWN) {
val = SESSEND | IDDIG;
omap4_usb_phy_mailbox(glue, val);
}
if (glue->status != OMAP_MUSB_UNKNOWN)
omap_control_usb_set_mode(glue->control_otghs,
USB_MODE_DISCONNECT);
}
static int omap2430_musb_exit(struct musb *musb)
@ -498,7 +472,6 @@ static int omap2430_probe(struct platform_device *pdev)
struct omap2430_glue *glue;
struct device_node *np = pdev->dev.of_node;
struct musb_hdrc_config *config;
struct resource *res;
int ret = -ENOMEM;
glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
@ -521,12 +494,6 @@ static int omap2430_probe(struct platform_device *pdev)
glue->musb = musb;
glue->status = OMAP_MUSB_UNKNOWN;
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
glue->control_otghs = devm_request_and_ioremap(&pdev->dev, res);
if (glue->control_otghs == NULL)
dev_dbg(&pdev->dev, "Failed to obtain control memory\n");
if (np) {
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
@ -558,11 +525,22 @@ static int omap2430_probe(struct platform_device *pdev)
of_property_read_u32(np, "ram_bits", (u32 *)&config->ram_bits);
of_property_read_u32(np, "power", (u32 *)&pdata->power);
config->multipoint = of_property_read_bool(np, "multipoint");
pdata->has_mailbox = of_property_read_bool(np,
"ti,has-mailbox");
pdata->board_data = data;
pdata->config = config;
}
if (pdata->has_mailbox) {
glue->control_otghs = omap_get_control_dev();
if (IS_ERR(glue->control_otghs)) {
dev_vdbg(&pdev->dev, "Failed to get control device\n");
return -ENODEV;
}
} else {
glue->control_otghs = ERR_PTR(-ENODEV);
}
pdata->platform_ops = &omap2430_ops;
platform_set_drvdata(pdev, glue);

9
drivers/usb/musb/omap2430.h
View File

@ -49,13 +49,4 @@
#define OTG_FORCESTDBY 0x414
# define ENABLEFORCE (1 << 0)
/*
* Control Module bit definitions
* XXX: Will be removed once we have a driver for control module.
*/
#define AVALID BIT(0)
#define BVALID BIT(1)
#define VBUSVALID BIT(2)
#define SESSEND BIT(3)
#define IDDIG BIT(4)
#endif /* __MUSB_OMAP243X_H__ */

1
drivers/usb/phy/Kconfig
View File

@ -8,6 +8,7 @@ config OMAP_USB2
tristate "OMAP USB2 PHY Driver"
depends on ARCH_OMAP2PLUS
select USB_OTG_UTILS
select OMAP_CONTROL_USB
help
Enable this to support the transceiver that is part of SOC. This
driver takes care of all the PHY functionality apart from comparator.

41
drivers/usb/phy/omap-usb2.c
View File

@ -27,6 +27,7 @@
#include <linux/err.h>
#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include <linux/usb/omap_control_usb.h>
/**
* omap_usb2_set_comparator - links the comparator present in the sytem with
@ -52,29 +53,6 @@ int omap_usb2_set_comparator(struct phy_companion *comparator)
}
EXPORT_SYMBOL_GPL(omap_usb2_set_comparator);
/**
* omap_usb_phy_power - power on/off the phy using control module reg
* @phy: struct omap_usb *
* @on: 0 or 1, based on powering on or off the PHY
*
* XXX: Remove this function once control module driver gets merged
*/
static void omap_usb_phy_power(struct omap_usb *phy, int on)
{
u32 val;
if (on) {
val = readl(phy->control_dev);
if (val & PHY_PD) {
writel(~PHY_PD, phy->control_dev);
/* XXX: add proper documentation for this delay */
mdelay(200);
}
} else {
writel(PHY_PD, phy->control_dev);
}
}
static int omap_usb_set_vbus(struct usb_otg *otg, bool enabled)
{
struct omap_usb *phy = phy_to_omapusb(otg->phy);
@ -124,7 +102,7 @@ static int omap_usb2_suspend(struct usb_phy *x, int suspend)
struct omap_usb *phy = phy_to_omapusb(x);
if (suspend && !phy->is_suspended) {
omap_usb_phy_power(phy, 0);
omap_control_usb_phy_power(phy->control_dev, 0);
pm_runtime_put_sync(phy->dev);
phy->is_suspended = 1;
} else if (!suspend && phy->is_suspended) {
@ -134,7 +112,7 @@ static int omap_usb2_suspend(struct usb_phy *x, int suspend)
ret);
return ret;
}
omap_usb_phy_power(phy, 1);
omap_control_usb_phy_power(phy->control_dev, 1);
phy->is_suspended = 0;
}
@ -145,7 +123,6 @@ static int omap_usb2_probe(struct platform_device *pdev)
{
struct omap_usb *phy;
struct usb_otg *otg;
struct resource *res;
phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL);
if (!phy) {
@ -166,16 +143,14 @@ static int omap_usb2_probe(struct platform_device *pdev)
phy->phy.set_suspend = omap_usb2_suspend;
phy->phy.otg = otg;
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
phy->control_dev = devm_request_and_ioremap(&pdev->dev, res);
if (phy->control_dev == NULL) {
dev_err(&pdev->dev, "Failed to obtain io memory\n");
return -ENXIO;
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;
}
phy->is_suspended = 1;
omap_usb_phy_power(phy, 0);
omap_control_usb_phy_power(phy->control_dev, 0);
otg->set_host = omap_usb_set_host;
otg->set_peripheral = omap_usb_set_peripheral;

4
include/linux/usb/omap_usb.h
View File

@ -25,13 +25,11 @@ struct omap_usb {
struct usb_phy phy;
struct phy_companion *comparator;
struct device *dev;
u32 __iomem *control_dev;
struct device *control_dev;
struct clk *wkupclk;
u8 is_suspended:1;
};
#define PHY_PD 0x1
#define phy_to_omapusb(x) container_of((x), struct omap_usb, phy)
#if defined(CONFIG_OMAP_USB2) || defined(CONFIG_OMAP_USB2_MODULE)