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/*
* Copyright (C) 2005-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/kernel.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/usb/fsl_xcvr.h>
#include <mach/pmic_external.h>
#include <mach/pmic_convity.h>
#include <mach/arc_otg.h>
/* Events to be passed to the thread */
#define MC13783_USB_VBUS_ON 0x0001
#define MC13783_USB_VBUS_OFF 0x0002
#define MC13783_USB_DETECT_MINI_A 0x0004
#define MC13783_USB_DETECT_MINI_B 0x0008
extern void otg_set_serial_peripheral(void);
extern void otg_set_serial_host(void);
static unsigned int p_event;
static PMIC_CONVITY_EVENTS g_event;
static PMIC_CONVITY_HANDLE pmic_handle = (PMIC_CONVITY_HANDLE) NULL;
static void xc_workqueue_handler(struct work_struct *work);
DECLARE_WORK(xc_work, xc_workqueue_handler);
DECLARE_MUTEX(pmic_mx);
static void pmic_event_handler(const PMIC_CONVITY_EVENTS event)
{
if (event & USB_DETECT_4V4_RISE)
pr_debug("%s: USB_DETECT_4V4_RISE\n", __func__);
if (event & USB_DETECT_4V4_FALL)
pr_debug("%s: USB_DETECT_4V4_FALL\n", __func__);
if (event & USB_DETECT_2V0_RISE)
pr_debug("%s: USB_DETECT_2V0_RISE\n", __func__);
if (event & USB_DETECT_2V0_FALL)
pr_debug("%s: USB_DETECT_2V0_FALL\n", __func__);
if (event & USB_DETECT_0V8_RISE)
pr_debug("%s: USB_DETECT_0V8_RISE\n", __func__);
if (event & USB_DETECT_0V8_FALL)
pr_debug("%s: USB_DETECT_0V8_FALL\n", __func__);
if (event & USB_DETECT_MINI_B) {
pr_debug("%s: USB_DETECT_MINI_B\n", __func__);
otg_set_serial_peripheral();
g_event = USB_DETECT_MINI_B;
p_event = MC13783_USB_DETECT_MINI_B;
schedule_work(&xc_work);
}
if (event & USB_DETECT_MINI_A) {
pr_debug("%s: USB_DETECT_MINI_A\n", __func__);
otg_set_serial_host();
g_event = USB_DETECT_MINI_A;
p_event = MC13783_USB_DETECT_MINI_A;
schedule_work(&xc_work);
}
/*
* Mini-B cable insertion/removal does not generate cable-detect
* event, so we rely on the VBUS changes to identify a mini-b cable
* connect. This logic is only used if mini-b is the first cable that
* is connected after bootup. At all other times, removal of mini-a
* cable is used to initialize peripheral.
*/
if (g_event != USB_DETECT_MINI_A && g_event != USB_DETECT_MINI_B) {
if ((event & USB_DETECT_0V8_RISE) &&
(event & USB_DETECT_2V0_RISE) &&
(event & USB_DETECT_4V4_RISE)) {
otg_set_serial_peripheral();
g_event = USB_DETECT_MINI_B;
p_event = MC13783_USB_DETECT_MINI_B;
schedule_work(&xc_work);
}
}
}
static int usb_pmic_mod_init(void)
{
PMIC_STATUS rs = PMIC_ERROR;
init_MUTEX_LOCKED(&pmic_mx);
rs = pmic_convity_open(&pmic_handle, USB);
if (rs != PMIC_SUCCESS) {
printk(KERN_ERR "pmic_convity_open returned error %d\n", rs);
return rs;
}
rs = pmic_convity_set_callback(pmic_handle, pmic_event_handler,
USB_DETECT_4V4_RISE | USB_DETECT_4V4_FALL
| USB_DETECT_2V0_RISE |
USB_DETECT_2V0_FALL | USB_DETECT_0V8_RISE
| USB_DETECT_0V8_FALL | USB_DETECT_MINI_A
| USB_DETECT_MINI_B);
if (rs != PMIC_SUCCESS) {
printk(KERN_ERR
"pmic_convity_set_callback returned error %d\n", rs);
return rs;
}
return rs;
}
static void usb_pmic_mod_exit(void)
{
PMIC_STATUS rs;
pmic_convity_set_mode(pmic_handle, RS232_1);
pmic_convity_clear_callback(pmic_handle);
if (pmic_handle != (PMIC_CONVITY_HANDLE) NULL) {
rs = pmic_convity_close(pmic_handle);
if (rs != PMIC_SUCCESS) {
printk(KERN_ERR
"pmic_convity_close() returned error %d", rs);
} else {
pmic_handle = (PMIC_CONVITY_HANDLE) NULL;
}
}
}
static inline void mc13783_set_host(void)
{
PMIC_STATUS rs = PMIC_ERROR;
rs = pmic_convity_usb_otg_clear_config(pmic_handle, USB_OTG_SE0CONN);
rs |= pmic_convity_usb_otg_clear_config(pmic_handle, USB_PU);
rs |= pmic_convity_usb_otg_set_config(pmic_handle, USB_UDM_PD);
rs |= pmic_convity_usb_otg_set_config(pmic_handle, USB_UDP_PD);
if (rs != PMIC_SUCCESS)
printk(KERN_ERR "mc13783_set_host failed\n");
}
static inline void mc13783_set_peripheral(void)
{
PMIC_STATUS rs = PMIC_ERROR;
rs = pmic_convity_usb_otg_clear_config(pmic_handle, USB_UDM_PD);
rs |= pmic_convity_usb_otg_clear_config(pmic_handle, USB_UDP_PD);
rs |= pmic_convity_usb_set_speed(pmic_handle, USB_FULL_SPEED);
rs |= pmic_convity_usb_otg_set_config(pmic_handle, USB_OTG_SE0CONN);
rs |= pmic_convity_usb_otg_set_config(pmic_handle, USB_PU);
if (rs != PMIC_SUCCESS)
printk(KERN_ERR "mc13783_set_peripheral failed\n");
}
void mc13783_set_vbus_power(struct fsl_xcvr_ops *this,
struct fsl_usb2_platform_data *pdata, int on)
{
if (on) {
p_event = MC13783_USB_VBUS_ON;
schedule_work(&xc_work);
}
}
static struct fsl_xcvr_ops mc13783_ops_otg = {
.name = "mc13783",
.xcvr_type = PORTSC_PTS_SERIAL,
.set_host = mc13783_set_host,
.set_device = mc13783_set_peripheral,
.set_vbus_power = mc13783_set_vbus_power,
};
extern void fsl_usb_xcvr_register(struct fsl_xcvr_ops *xcvr_ops);
static void xc_workqueue_handler(struct work_struct *work)
{
PMIC_STATUS rs = PMIC_ERROR;
down(&pmic_mx);
switch (p_event) {
case MC13783_USB_VBUS_OFF:
mc13783_set_peripheral();
break;
case MC13783_USB_VBUS_ON:
mc13783_set_host();
break;
case MC13783_USB_DETECT_MINI_B:
rs = pmic_convity_set_output(pmic_handle, true, false);
rs |=
pmic_convity_usb_otg_clear_config(pmic_handle,
USB_VBUS_CURRENT_LIMIT_LOW_30MS);
if (rs != PMIC_SUCCESS)
printk(KERN_ERR "MC13783_USB_VBUS_OFF failed\n");
break;
case MC13783_USB_DETECT_MINI_A:
rs = pmic_convity_set_output(pmic_handle, true, true);
rs |=
pmic_convity_usb_otg_set_config(pmic_handle,
USB_VBUS_CURRENT_LIMIT_LOW_30MS);
if (rs != PMIC_SUCCESS)
printk(KERN_ERR "MC13783_USB_VBUS_ON failed\n");
break;
default:
break;
}
up(&pmic_mx);
}
int mc13783xc_init(void)
{
PMIC_STATUS rs = PMIC_ERROR;
#if defined(CONFIG_MXC_USB_SB3)
int xc_mode = USB_SINGLE_ENDED_BIDIR;
#elif defined(CONFIG_MXC_USB_SU6)
int xc_mode = USB_SINGLE_ENDED_UNIDIR;
#elif defined(CONFIG_MXC_USB_DB4)
int xc_mode = USB_DIFFERENTIAL_BIDIR;
#else
int xc_mode = USB_DIFFERENTIAL_UNIDIR;
#endif
rs = usb_pmic_mod_init();
if (rs != PMIC_SUCCESS) {
usb_pmic_mod_exit();
printk(KERN_ERR "usb_pmic_mod_init failed\n");
return rs;
}
rs = pmic_convity_usb_set_xcvr(pmic_handle, xc_mode);
rs |= pmic_convity_usb_otg_set_config(pmic_handle, USB_OTG_SE0CONN);
rs |= pmic_convity_usb_otg_set_config(pmic_handle, USBXCVREN);
rs |= pmic_convity_set_output(pmic_handle, false, true);
rs |= pmic_convity_usb_otg_set_config(pmic_handle, USB_PULL_OVERRIDE);
rs |= pmic_convity_usb_otg_clear_config(pmic_handle, USB_USBCNTRL);
rs |= pmic_convity_usb_otg_clear_config(pmic_handle, USB_DP150K_PU);
if (rs != PMIC_SUCCESS)
printk(KERN_ERR "pmic configuration failed\n");
fsl_usb_xcvr_register(&mc13783_ops_otg);
mc13783_set_peripheral();
return rs;
}
extern void fsl_usb_xcvr_unregister(struct fsl_xcvr_ops *xcvr_ops);
void mc13783xc_uninit(void)
{
/* Clear stuff from init */
pmic_convity_usb_otg_clear_config(pmic_handle, USB_OTG_SE0CONN);
pmic_convity_usb_otg_clear_config(pmic_handle, USBXCVREN);
pmic_convity_set_output(pmic_handle, false, false);
pmic_convity_usb_otg_clear_config(pmic_handle, USB_PULL_OVERRIDE);
/* Clear host mode */
pmic_convity_usb_otg_clear_config(pmic_handle, USB_UDP_PD);
pmic_convity_usb_otg_clear_config(pmic_handle, USB_UDM_PD);
/* Clear peripheral mode */
pmic_convity_usb_otg_clear_config(pmic_handle, USB_PU);
/* Vbus off */
pmic_convity_set_output(pmic_handle, true, false);
pmic_convity_usb_otg_clear_config(pmic_handle,
USB_VBUS_CURRENT_LIMIT_LOW_30MS);
usb_pmic_mod_exit();
fsl_usb_xcvr_unregister(&mc13783_ops_otg);
}
subsys_initcall(mc13783xc_init);
module_exit(mc13783xc_uninit);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("mc13783xc");
MODULE_LICENSE("GPL");
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