aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/usb/musb/omap2430.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/usb/musb/omap2430.c')
-rw-r--r--drivers/usb/musb/omap2430.c156
1 files changed, 131 insertions, 25 deletions
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 5fdb9da8dd56..a538fe17a966 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -30,10 +30,12 @@
#include <linux/init.h>
#include <linux/list.h>
#include <linux/io.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/err.h>
+#include <linux/delay.h>
#include <linux/usb/musb-omap.h>
#include "musb_core.h"
@@ -44,6 +46,7 @@ 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;
};
#define glue_to_musb(g) platform_get_drvdata(g->musb)
@@ -51,6 +54,26 @@ 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;
@@ -140,7 +163,6 @@ static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
struct usb_otg *otg = musb->xceiv->otg;
u8 devctl;
unsigned long timeout = jiffies + msecs_to_jiffies(1000);
- int ret = 1;
/* HDRC controls CPEN, but beware current surges during device
* connect. They can trigger transient overcurrent conditions
* that must be ignored.
@@ -150,6 +172,7 @@ static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
if (is_on) {
if (musb->xceiv->state == OTG_STATE_A_IDLE) {
+ int loops = 100;
/* start the session */
devctl |= MUSB_DEVCTL_SESSION;
musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
@@ -159,17 +182,18 @@ static void omap2430_musb_set_vbus(struct musb *musb, int is_on)
*/
while (musb_readb(musb->mregs, MUSB_DEVCTL) & 0x80) {
+ mdelay(5);
cpu_relax();
- if (time_after(jiffies, timeout)) {
+ if (time_after(jiffies, timeout)
+ || loops-- <= 0) {
dev_err(musb->controller,
"configured as A device timeout");
- ret = -EINVAL;
break;
}
}
- if (ret && otg->set_vbus)
+ if (otg->set_vbus)
otg_set_vbus(otg, 1);
} else {
musb->is_active = 1;
@@ -245,6 +269,7 @@ 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;
@@ -258,9 +283,10 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue)
otg->default_a = true;
musb->xceiv->state = OTG_STATE_A_IDLE;
musb->xceiv->last_event = USB_EVENT_ID;
- if (!is_otg_enabled(musb) || musb->gadget_driver) {
+ if (musb->gadget_driver) {
pm_runtime_get_sync(dev);
- usb_phy_init(musb->xceiv);
+ val = AVALID | VBUSVALID;
+ omap4_usb_phy_mailbox(glue, val);
omap2430_musb_set_vbus(musb, 1);
}
break;
@@ -273,7 +299,8 @@ 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);
- usb_phy_init(musb->xceiv);
+ val = IDDIG | AVALID | VBUSVALID;
+ omap4_usb_phy_mailbox(glue, val);
break;
case OMAP_MUSB_ID_FLOAT:
@@ -281,17 +308,17 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue)
dev_dbg(dev, "VBUS Disconnect\n");
musb->xceiv->last_event = USB_EVENT_NONE;
- if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
- if (musb->gadget_driver) {
- pm_runtime_mark_last_busy(dev);
- pm_runtime_put_autosuspend(dev);
- }
+ if (musb->gadget_driver) {
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_autosuspend(dev);
+ }
if (data->interface_type == MUSB_INTERFACE_UTMI) {
if (musb->xceiv->otg->set_vbus)
otg_set_vbus(musb->xceiv->otg, 0);
}
- usb_phy_shutdown(musb->xceiv);
+ val = SESSEND | IDDIG;
+ omap4_usb_phy_mailbox(glue, val);
break;
default:
dev_dbg(dev, "ID float\n");
@@ -366,6 +393,7 @@ 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);
@@ -375,7 +403,8 @@ static void omap2430_musb_enable(struct musb *musb)
switch (glue->status) {
case OMAP_MUSB_ID_GROUND:
- usb_phy_init(musb->xceiv);
+ val = AVALID | VBUSVALID;
+ omap4_usb_phy_mailbox(glue, val);
if (data->interface_type != MUSB_INTERFACE_UTMI)
break;
devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
@@ -394,7 +423,8 @@ static void omap2430_musb_enable(struct musb *musb)
break;
case OMAP_MUSB_VBUS_VALID:
- usb_phy_init(musb->xceiv);
+ val = IDDIG | AVALID | VBUSVALID;
+ omap4_usb_phy_mailbox(glue, val);
break;
default:
@@ -404,11 +434,14 @@ 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)
- usb_phy_shutdown(musb->xceiv);
+ if (glue->status != OMAP_MUSB_UNKNOWN) {
+ val = SESSEND | IDDIG;
+ omap4_usb_phy_mailbox(glue, val);
+ }
}
static int omap2430_musb_exit(struct musb *musb)
@@ -438,9 +471,14 @@ static u64 omap2430_dmamask = DMA_BIT_MASK(32);
static int __devinit omap2430_probe(struct platform_device *pdev)
{
struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
+ struct omap_musb_board_data *data;
struct platform_device *musb;
struct omap2430_glue *glue;
+ struct device_node *np = pdev->dev.of_node;
+ struct musb_hdrc_config *config;
+ struct resource *res;
int ret = -ENOMEM;
+ int musbid;
glue = devm_kzalloc(&pdev->dev, sizeof(*glue), GFP_KERNEL);
if (!glue) {
@@ -448,12 +486,21 @@ static int __devinit omap2430_probe(struct platform_device *pdev)
goto err0;
}
- musb = platform_device_alloc("musb-hdrc", -1);
+ /* get the musb id */
+ musbid = musb_get_id(&pdev->dev, GFP_KERNEL);
+ if (musbid < 0) {
+ dev_err(&pdev->dev, "failed to allocate musb id\n");
+ ret = -ENOMEM;
+ goto err0;
+ }
+
+ musb = platform_device_alloc("musb-hdrc", musbid);
if (!musb) {
dev_err(&pdev->dev, "failed to allocate musb device\n");
- goto err0;
+ goto err1;
}
+ musb->id = musbid;
musb->dev.parent = &pdev->dev;
musb->dev.dma_mask = &omap2430_dmamask;
musb->dev.coherent_dma_mask = omap2430_dmamask;
@@ -462,6 +509,48 @@ static int __devinit 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) {
+ dev_err(&pdev->dev,
+ "failed to allocate musb platfrom data\n");
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ dev_err(&pdev->dev,
+ "failed to allocate musb board data\n");
+ ret = -ENOMEM;
+ goto err1;
+ }
+
+ config = devm_kzalloc(&pdev->dev, sizeof(*config), GFP_KERNEL);
+ if (!data) {
+ dev_err(&pdev->dev,
+ "failed to allocate musb hdrc config\n");
+ goto err1;
+ }
+
+ of_property_read_u32(np, "mode", (u32 *)&pdata->mode);
+ of_property_read_u32(np, "interface_type",
+ (u32 *)&data->interface_type);
+ of_property_read_u32(np, "num_eps", (u32 *)&config->num_eps);
+ 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->board_data = data;
+ pdata->config = config;
+ }
+
pdata->platform_ops = &omap2430_ops;
platform_set_drvdata(pdev, glue);
@@ -478,13 +567,13 @@ static int __devinit omap2430_probe(struct platform_device *pdev)
pdev->num_resources);
if (ret) {
dev_err(&pdev->dev, "failed to add resources\n");
- goto err1;
+ goto err2;
}
ret = platform_device_add_data(musb, pdata, sizeof(*pdata));
if (ret) {
dev_err(&pdev->dev, "failed to add platform_data\n");
- goto err1;
+ goto err2;
}
pm_runtime_enable(&pdev->dev);
@@ -492,14 +581,17 @@ static int __devinit omap2430_probe(struct platform_device *pdev)
ret = platform_device_add(musb);
if (ret) {
dev_err(&pdev->dev, "failed to register musb device\n");
- goto err1;
+ goto err2;
}
return 0;
-err1:
+err2:
platform_device_put(musb);
+err1:
+ musb_put_id(&pdev->dev, musbid);
+
err0:
return ret;
}
@@ -509,8 +601,8 @@ static int __devexit omap2430_remove(struct platform_device *pdev)
struct omap2430_glue *glue = platform_get_drvdata(pdev);
cancel_work_sync(&glue->omap_musb_mailbox_work);
- platform_device_del(glue->musb);
- platform_device_put(glue->musb);
+ musb_put_id(&pdev->dev, glue->musb->id);
+ platform_device_unregister(glue->musb);
return 0;
}
@@ -559,12 +651,26 @@ static struct dev_pm_ops omap2430_pm_ops = {
#define DEV_PM_OPS NULL
#endif
+#ifdef CONFIG_OF
+static const struct of_device_id omap2430_id_table[] = {
+ {
+ .compatible = "ti,omap4-musb"
+ },
+ {
+ .compatible = "ti,omap3-musb"
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, omap2430_id_table);
+#endif
+
static struct platform_driver omap2430_driver = {
.probe = omap2430_probe,
.remove = __devexit_p(omap2430_remove),
.driver = {
.name = "musb-omap2430",
.pm = DEV_PM_OPS,
+ .of_match_table = of_match_ptr(omap2430_id_table),
},
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.