diff options
Diffstat (limited to 'arch/arm/plat-mxc/mc13783_xc.c')
| -rw-r--r-- | arch/arm/plat-mxc/mc13783_xc.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/mc13783_xc.c b/arch/arm/plat-mxc/mc13783_xc.c new file mode 100644 index 000000000000..9c41fbf5a8a8 --- /dev/null +++ b/arch/arm/plat-mxc/mc13783_xc.c @@ -0,0 +1,299 @@ +/* + * 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"); |