diff options
Diffstat (limited to 'drivers/usb/otg/fsl_otg.c')
| -rw-r--r-- | drivers/usb/otg/fsl_otg.c | 1183 |
1 files changed, 0 insertions, 1183 deletions
diff --git a/drivers/usb/otg/fsl_otg.c b/drivers/usb/otg/fsl_otg.c deleted file mode 100644 index d16adb41eb21..000000000000 --- a/drivers/usb/otg/fsl_otg.c +++ /dev/null @@ -1,1183 +0,0 @@ -/* - * Copyright (C) 2007,2008 Freescale semiconductor, Inc. - * - * Author: Li Yang <LeoLi@freescale.com> - * Jerry Huang <Chang-Ming.Huang@freescale.com> - * - * Initialization based on code from Shlomi Gridish. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/delay.h> -#include <linux/slab.h> -#include <linux/proc_fs.h> -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/timer.h> -#include <linux/usb.h> -#include <linux/device.h> -#include <linux/usb/ch9.h> -#include <linux/usb/gadget.h> -#include <linux/workqueue.h> -#include <linux/time.h> -#include <linux/fsl_devices.h> -#include <linux/platform_device.h> -#include <linux/uaccess.h> - -#include <asm/unaligned.h> - -#include "fsl_otg.h" - -#define DRIVER_VERSION "Rev. 1.55" -#define DRIVER_AUTHOR "Jerry Huang/Li Yang" -#define DRIVER_DESC "Freescale USB OTG Transceiver Driver" -#define DRIVER_INFO DRIVER_DESC " " DRIVER_VERSION - -static const char driver_name[] = "fsl-usb2-otg"; - -const pm_message_t otg_suspend_state = { - .event = 1, -}; - -#define HA_DATA_PULSE - -static struct usb_dr_mmap *usb_dr_regs; -static struct fsl_otg *fsl_otg_dev; -static int srp_wait_done; - -/* FSM timers */ -struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, *a_aidl_bdis_tmr, - *b_ase0_brst_tmr, *b_se0_srp_tmr; - -/* Driver specific timers */ -struct fsl_otg_timer *b_data_pulse_tmr, *b_vbus_pulse_tmr, *b_srp_fail_tmr, - *b_srp_wait_tmr, *a_wait_enum_tmr; - -static struct list_head active_timers; - -static struct fsl_otg_config fsl_otg_initdata = { - .otg_port = 1, -}; - -#ifdef CONFIG_PPC32 -static u32 _fsl_readl_be(const unsigned __iomem *p) -{ - return in_be32(p); -} - -static u32 _fsl_readl_le(const unsigned __iomem *p) -{ - return in_le32(p); -} - -static void _fsl_writel_be(u32 v, unsigned __iomem *p) -{ - out_be32(p, v); -} - -static void _fsl_writel_le(u32 v, unsigned __iomem *p) -{ - out_le32(p, v); -} - -static u32 (*_fsl_readl)(const unsigned __iomem *p); -static void (*_fsl_writel)(u32 v, unsigned __iomem *p); - -#define fsl_readl(p) (*_fsl_readl)((p)) -#define fsl_writel(v, p) (*_fsl_writel)((v), (p)) - -#else -#define fsl_readl(addr) readl(addr) -#define fsl_writel(val, addr) writel(val, addr) -#endif /* CONFIG_PPC32 */ - -/* Routines to access transceiver ULPI registers */ -u8 view_ulpi(u8 addr) -{ - u32 temp; - - temp = 0x40000000 | (addr << 16); - fsl_writel(temp, &usb_dr_regs->ulpiview); - udelay(1000); - while (temp & 0x40) - temp = fsl_readl(&usb_dr_regs->ulpiview); - return (le32_to_cpu(temp) & 0x0000ff00) >> 8; -} - -int write_ulpi(u8 addr, u8 data) -{ - u32 temp; - - temp = 0x60000000 | (addr << 16) | data; - fsl_writel(temp, &usb_dr_regs->ulpiview); - return 0; -} - -/* -------------------------------------------------------------*/ -/* Operations that will be called from OTG Finite State Machine */ - -/* Charge vbus for vbus pulsing in SRP */ -void fsl_otg_chrg_vbus(int on) -{ - u32 tmp; - - tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK; - - if (on) - /* stop discharging, start charging */ - tmp = (tmp & ~OTGSC_CTRL_VBUS_DISCHARGE) | - OTGSC_CTRL_VBUS_CHARGE; - else - /* stop charging */ - tmp &= ~OTGSC_CTRL_VBUS_CHARGE; - - fsl_writel(tmp, &usb_dr_regs->otgsc); -} - -/* Discharge vbus through a resistor to ground */ -void fsl_otg_dischrg_vbus(int on) -{ - u32 tmp; - - tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK; - - if (on) - /* stop charging, start discharging */ - tmp = (tmp & ~OTGSC_CTRL_VBUS_CHARGE) | - OTGSC_CTRL_VBUS_DISCHARGE; - else - /* stop discharging */ - tmp &= ~OTGSC_CTRL_VBUS_DISCHARGE; - - fsl_writel(tmp, &usb_dr_regs->otgsc); -} - -/* A-device driver vbus, controlled through PP bit in PORTSC */ -void fsl_otg_drv_vbus(int on) -{ - u32 tmp; - - if (on) { - tmp = fsl_readl(&usb_dr_regs->portsc) & ~PORTSC_W1C_BITS; - fsl_writel(tmp | PORTSC_PORT_POWER, &usb_dr_regs->portsc); - } else { - tmp = fsl_readl(&usb_dr_regs->portsc) & - ~PORTSC_W1C_BITS & ~PORTSC_PORT_POWER; - fsl_writel(tmp, &usb_dr_regs->portsc); - } -} - -/* - * Pull-up D+, signalling connect by periperal. Also used in - * data-line pulsing in SRP - */ -void fsl_otg_loc_conn(int on) -{ - u32 tmp; - - tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK; - - if (on) - tmp |= OTGSC_CTRL_DATA_PULSING; - else - tmp &= ~OTGSC_CTRL_DATA_PULSING; - - fsl_writel(tmp, &usb_dr_regs->otgsc); -} - -/* - * Generate SOF by host. This is controlled through suspend/resume the - * port. In host mode, controller will automatically send SOF. - * Suspend will block the data on the port. - */ -void fsl_otg_loc_sof(int on) -{ - u32 tmp; - - tmp = fsl_readl(&fsl_otg_dev->dr_mem_map->portsc) & ~PORTSC_W1C_BITS; - if (on) - tmp |= PORTSC_PORT_FORCE_RESUME; - else - tmp |= PORTSC_PORT_SUSPEND; - - fsl_writel(tmp, &fsl_otg_dev->dr_mem_map->portsc); - -} - -/* Start SRP pulsing by data-line pulsing, followed with v-bus pulsing. */ -void fsl_otg_start_pulse(void) -{ - u32 tmp; - - srp_wait_done = 0; -#ifdef HA_DATA_PULSE - tmp = fsl_readl(&usb_dr_regs->otgsc) & ~OTGSC_INTSTS_MASK; - tmp |= OTGSC_HA_DATA_PULSE; - fsl_writel(tmp, &usb_dr_regs->otgsc); -#else - fsl_otg_loc_conn(1); -#endif - - fsl_otg_add_timer(b_data_pulse_tmr); -} - -void b_data_pulse_end(unsigned long foo) -{ -#ifdef HA_DATA_PULSE -#else - fsl_otg_loc_conn(0); -#endif - - /* Do VBUS pulse after data pulse */ - fsl_otg_pulse_vbus(); -} - -void fsl_otg_pulse_vbus(void) -{ - srp_wait_done = 0; - fsl_otg_chrg_vbus(1); - /* start the timer to end vbus charge */ - fsl_otg_add_timer(b_vbus_pulse_tmr); -} - -void b_vbus_pulse_end(unsigned long foo) -{ - fsl_otg_chrg_vbus(0); - - /* - * As USB3300 using the same a_sess_vld and b_sess_vld voltage - * we need to discharge the bus for a while to distinguish - * residual voltage of vbus pulsing and A device pull up - */ - fsl_otg_dischrg_vbus(1); - fsl_otg_add_timer(b_srp_wait_tmr); -} - -void b_srp_end(unsigned long foo) -{ - fsl_otg_dischrg_vbus(0); - srp_wait_done = 1; - - if ((fsl_otg_dev->phy.state == OTG_STATE_B_SRP_INIT) && - fsl_otg_dev->fsm.b_sess_vld) - fsl_otg_dev->fsm.b_srp_done = 1; -} - -/* - * Workaround for a_host suspending too fast. When a_bus_req=0, - * a_host will start by SRP. It needs to set b_hnp_enable before - * actually suspending to start HNP - */ -void a_wait_enum(unsigned long foo) -{ - VDBG("a_wait_enum timeout\n"); - if (!fsl_otg_dev->phy.otg->host->b_hnp_enable) - fsl_otg_add_timer(a_wait_enum_tmr); - else - otg_statemachine(&fsl_otg_dev->fsm); -} - -/* The timeout callback function to set time out bit */ -void set_tmout(unsigned long indicator) -{ - *(int *)indicator = 1; -} - -/* Initialize timers */ -int fsl_otg_init_timers(struct otg_fsm *fsm) -{ - /* FSM used timers */ - a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE, - (unsigned long)&fsm->a_wait_vrise_tmout); - if (!a_wait_vrise_tmr) - return -ENOMEM; - - a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON, - (unsigned long)&fsm->a_wait_bcon_tmout); - if (!a_wait_bcon_tmr) - return -ENOMEM; - - a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS, - (unsigned long)&fsm->a_aidl_bdis_tmout); - if (!a_aidl_bdis_tmr) - return -ENOMEM; - - b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST, - (unsigned long)&fsm->b_ase0_brst_tmout); - if (!b_ase0_brst_tmr) - return -ENOMEM; - - b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP, - (unsigned long)&fsm->b_se0_srp); - if (!b_se0_srp_tmr) - return -ENOMEM; - - b_srp_fail_tmr = otg_timer_initializer(&set_tmout, TB_SRP_FAIL, - (unsigned long)&fsm->b_srp_done); - if (!b_srp_fail_tmr) - return -ENOMEM; - - a_wait_enum_tmr = otg_timer_initializer(&a_wait_enum, 10, - (unsigned long)&fsm); - if (!a_wait_enum_tmr) - return -ENOMEM; - - /* device driver used timers */ - b_srp_wait_tmr = otg_timer_initializer(&b_srp_end, TB_SRP_WAIT, 0); - if (!b_srp_wait_tmr) - return -ENOMEM; - - b_data_pulse_tmr = otg_timer_initializer(&b_data_pulse_end, - TB_DATA_PLS, 0); - if (!b_data_pulse_tmr) - return -ENOMEM; - - b_vbus_pulse_tmr = otg_timer_initializer(&b_vbus_pulse_end, - TB_VBUS_PLS, 0); - if (!b_vbus_pulse_tmr) - return -ENOMEM; - - return 0; -} - -/* Uninitialize timers */ -void fsl_otg_uninit_timers(void) -{ - /* FSM used timers */ - if (a_wait_vrise_tmr != NULL) - kfree(a_wait_vrise_tmr); - if (a_wait_bcon_tmr != NULL) - kfree(a_wait_bcon_tmr); - if (a_aidl_bdis_tmr != NULL) - kfree(a_aidl_bdis_tmr); - if (b_ase0_brst_tmr != NULL) - kfree(b_ase0_brst_tmr); - if (b_se0_srp_tmr != NULL) - kfree(b_se0_srp_tmr); - if (b_srp_fail_tmr != NULL) - kfree(b_srp_fail_tmr); - if (a_wait_enum_tmr != NULL) - kfree(a_wait_enum_tmr); - - /* device driver used timers */ - if (b_srp_wait_tmr != NULL) - kfree(b_srp_wait_tmr); - if (b_data_pulse_tmr != NULL) - kfree(b_data_pulse_tmr); - if (b_vbus_pulse_tmr != NULL) - kfree(b_vbus_pulse_tmr); -} - -/* Add timer to timer list */ -void fsl_otg_add_timer(void *gtimer) -{ - struct fsl_otg_timer *timer = gtimer; - struct fsl_otg_timer *tmp_timer; - - /* - * Check if the timer is already in the active list, - * if so update timer count - */ - list_for_each_entry(tmp_timer, &active_timers, list) - if (tmp_timer == timer) { - timer->count = timer->expires; - return; - } - timer->count = timer->expires; - list_add_tail(&timer->list, &active_timers); -} - -/* Remove timer from the timer list; clear timeout status */ -void fsl_otg_del_timer(void *gtimer) -{ - struct fsl_otg_timer *timer = gtimer; - struct fsl_otg_timer *tmp_timer, *del_tmp; - - list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) - if (tmp_timer == timer) - list_del(&timer->list); -} - -/* - * Reduce timer count by 1, and find timeout conditions. - * Called by fsl_otg 1ms timer interrupt - */ -int fsl_otg_tick_timer(void) -{ - struct fsl_otg_timer *tmp_timer, *del_tmp; - int expired = 0; - - list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) { - tmp_timer->count--; - /* check if timer expires */ - if (!tmp_timer->count) { - list_del(&tmp_timer->list); - tmp_timer->function(tmp_timer->data); - expired = 1; - } - } - - return expired; -} - -/* Reset controller, not reset the bus */ -void otg_reset_controller(void) -{ - u32 command; - - command = fsl_readl(&usb_dr_regs->usbcmd); - command |= (1 << 1); - fsl_writel(command, &usb_dr_regs->usbcmd); - while (fsl_readl(&usb_dr_regs->usbcmd) & (1 << 1)) - ; -} - -/* Call suspend/resume routines in host driver */ -int fsl_otg_start_host(struct otg_fsm *fsm, int on) -{ - struct usb_otg *otg = fsm->otg; - struct device *dev; - struct fsl_otg *otg_dev = container_of(otg->phy, struct fsl_otg, phy); - u32 retval = 0; - - if (!otg->host) - return -ENODEV; - dev = otg->host->controller; - - /* - * Update a_vbus_vld state as a_vbus_vld int is disabled - * in device mode - */ - fsm->a_vbus_vld = - !!(fsl_readl(&usb_dr_regs->otgsc) & OTGSC_STS_A_VBUS_VALID); - if (on) { - /* start fsl usb host controller */ - if (otg_dev->host_working) - goto end; - else { - otg_reset_controller(); - VDBG("host on......\n"); - if (dev->driver->pm && dev->driver->pm->resume) { - retval = dev->driver->pm->resume(dev); - if (fsm->id) { - /* default-b */ - fsl_otg_drv_vbus(1); - /* - * Workaround: b_host can't driver - * vbus, but PP in PORTSC needs to - * be 1 for host to work. - * So we set drv_vbus bit in - * transceiver to 0 thru ULPI. - */ - write_ulpi(0x0c, 0x20); - } - } - - otg_dev->host_working = 1; - } - } else { - /* stop fsl usb host controller */ - if (!otg_dev->host_working) - goto end; - else { - VDBG("host off......\n"); - if (dev && dev->driver) { - if (dev->driver->pm && dev->driver->pm->suspend) - retval = dev->driver->pm->suspend(dev); - if (fsm->id) - /* default-b */ - fsl_otg_drv_vbus(0); - } - otg_dev->host_working = 0; - } - } -end: - return retval; -} - -/* - * Call suspend and resume function in udc driver - * to stop and start udc driver. - */ -int fsl_otg_start_gadget(struct otg_fsm *fsm, int on) -{ - struct usb_otg *otg = fsm->otg; - struct device *dev; - - if (!otg->gadget || !otg->gadget->dev.parent) - return -ENODEV; - - VDBG("gadget %s\n", on ? "on" : "off"); - dev = otg->gadget->dev.parent; - - if (on) { - if (dev->driver->resume) - dev->driver->resume(dev); - } else { - if (dev->driver->suspend) - dev->driver->suspend(dev, otg_suspend_state); - } - - return 0; -} - -/* - * Called by initialization code of host driver. Register host controller - * to the OTG. Suspend host for OTG role detection. - */ -static int fsl_otg_set_host(struct usb_otg *otg, struct usb_bus *host) -{ - struct fsl_otg *otg_dev; - - if (!otg) - return -ENODEV; - - otg_dev = container_of(otg->phy, struct fsl_otg, phy); - if (otg_dev != fsl_otg_dev) - return -ENODEV; - - otg->host = host; - - otg_dev->fsm.a_bus_drop = 0; - otg_dev->fsm.a_bus_req = 1; - - if (host) { - VDBG("host off......\n"); - - otg->host->otg_port = fsl_otg_initdata.otg_port; - otg->host->is_b_host = otg_dev->fsm.id; - /* - * must leave time for khubd to finish its thing - * before yanking the host driver out from under it, - * so suspend the host after a short delay. - */ - otg_dev->host_working = 1; - schedule_delayed_work(&otg_dev->otg_event, 100); - return 0; - } else { - /* host driver going away */ - if (!(fsl_readl(&otg_dev->dr_mem_map->otgsc) & - OTGSC_STS_USB_ID)) { - /* Mini-A cable connected */ - struct otg_fsm *fsm = &otg_dev->fsm; - - otg->phy->state = OTG_STATE_UNDEFINED; - fsm->protocol = PROTO_UNDEF; - } - } - - otg_dev->host_working = 0; - - otg_statemachine(&otg_dev->fsm); - - return 0; -} - -/* Called by initialization code of udc. Register udc to OTG. */ -static int fsl_otg_set_peripheral(struct usb_otg *otg, - struct usb_gadget *gadget) -{ - struct fsl_otg *otg_dev; - - if (!otg) - return -ENODEV; - - otg_dev = container_of(otg->phy, struct fsl_otg, phy); - VDBG("otg_dev 0x%x\n", (int)otg_dev); - VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev); - if (otg_dev != fsl_otg_dev) - return -ENODEV; - - if (!gadget) { - if (!otg->default_a) - otg->gadget->ops->vbus_draw(otg->gadget, 0); - usb_gadget_vbus_disconnect(otg->gadget); - otg->gadget = 0; - otg_dev->fsm.b_bus_req = 0; - otg_statemachine(&otg_dev->fsm); - return 0; - } - - otg->gadget = gadget; - otg->gadget->is_a_peripheral = !otg_dev->fsm.id; - - otg_dev->fsm.b_bus_req = 1; - - /* start the gadget right away if the ID pin says Mini-B */ - DBG("ID pin=%d\n", otg_dev->fsm.id); - if (otg_dev->fsm.id == 1) { - fsl_otg_start_host(&otg_dev->fsm, 0); - otg_drv_vbus(&otg_dev->fsm, 0); - fsl_otg_start_gadget(&otg_dev->fsm, 1); - } - - return 0; -} - -/* Set OTG port power, only for B-device */ -static int fsl_otg_set_power(struct usb_phy *phy, unsigned mA) -{ - if (!fsl_otg_dev) - return -ENODEV; - if (phy->state == OTG_STATE_B_PERIPHERAL) - pr_info("FSL OTG: Draw %d mA\n", mA); - - return 0; -} - -/* - * Delayed pin detect interrupt processing. - * - * When the Mini-A cable is disconnected from the board, - * the pin-detect interrupt happens before the disconnect - * interrupts for the connected device(s). In order to - * process the disconnect interrupt(s) prior to switching - * roles, the pin-detect interrupts are delayed, and handled - * by this routine. - */ -static void fsl_otg_event(struct work_struct *work) -{ - struct fsl_otg *og = container_of(work, struct fsl_otg, otg_event.work); - struct otg_fsm *fsm = &og->fsm; - - if (fsm->id) { /* switch to gadget */ - fsl_otg_start_host(fsm, 0); - otg_drv_vbus(fsm, 0); - fsl_otg_start_gadget(fsm, 1); - } -} - -/* B-device start SRP */ -static int fsl_otg_start_srp(struct usb_otg *otg) -{ - struct fsl_otg *otg_dev; - - if (!otg || otg->phy->state != OTG_STATE_B_IDLE) - return -ENODEV; - - otg_dev = container_of(otg->phy, struct fsl_otg, phy); - if (otg_dev != fsl_otg_dev) - return -ENODEV; - - otg_dev->fsm.b_bus_req = 1; - otg_statemachine(&otg_dev->fsm); - - return 0; -} - -/* A_host suspend will call this function to start hnp */ -static int fsl_otg_start_hnp(struct usb_otg *otg) -{ - struct fsl_otg *otg_dev; - - if (!otg) - return -ENODEV; - - otg_dev = container_of(otg->phy, struct fsl_otg, phy); - if (otg_dev != fsl_otg_dev) - return -ENODEV; - - DBG("start_hnp...n"); - - /* clear a_bus_req to enter a_suspend state */ - otg_dev->fsm.a_bus_req = 0; - otg_statemachine(&otg_dev->fsm); - - return 0; -} - -/* - * Interrupt handler. OTG/host/peripheral share the same int line. - * OTG driver clears OTGSC interrupts and leaves USB interrupts - * intact. It needs to have knowledge of some USB interrupts - * such as port change. - */ -irqreturn_t fsl_otg_isr(int irq, void *dev_id) -{ - struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm; - struct usb_otg *otg = ((struct fsl_otg *)dev_id)->phy.otg; - u32 otg_int_src, otg_sc; - - otg_sc = fsl_readl(&usb_dr_regs->otgsc); - otg_int_src = otg_sc & OTGSC_INTSTS_MASK & (otg_sc >> 8); - - /* Only clear otg interrupts */ - fsl_writel(otg_sc, &usb_dr_regs->otgsc); - - /*FIXME: ID change not generate when init to 0 */ - fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0; - otg->default_a = (fsm->id == 0); - - /* process OTG interrupts */ - if (otg_int_src) { - if (otg_int_src & OTGSC_INTSTS_USB_ID) { - fsm->id = (otg_sc & OTGSC_STS_USB_ID) ? 1 : 0; - otg->default_a = (fsm->id == 0); - /* clear conn information */ - if (fsm->id) - fsm->b_conn = 0; - else - fsm->a_conn = 0; - - if (otg->host) - otg->host->is_b_host = fsm->id; - if (otg->gadget) - otg->gadget->is_a_peripheral = !fsm->id; - VDBG("ID int (ID is %d)\n", fsm->id); - - if (fsm->id) { /* switch to gadget */ - schedule_delayed_work( - &((struct fsl_otg *)dev_id)->otg_event, - 100); - } else { /* switch to host */ - cancel_delayed_work(& - ((struct fsl_otg *)dev_id)-> - otg_event); - fsl_otg_start_gadget(fsm, 0); - otg_drv_vbus(fsm, 1); - fsl_otg_start_host(fsm, 1); - } - return IRQ_HANDLED; - } - } - return IRQ_NONE; -} - -static struct otg_fsm_ops fsl_otg_ops = { - .chrg_vbus = fsl_otg_chrg_vbus, - .drv_vbus = fsl_otg_drv_vbus, - .loc_conn = fsl_otg_loc_conn, - .loc_sof = fsl_otg_loc_sof, - .start_pulse = fsl_otg_start_pulse, - - .add_timer = fsl_otg_add_timer, - .del_timer = fsl_otg_del_timer, - - .start_host = fsl_otg_start_host, - .start_gadget = fsl_otg_start_gadget, -}; - -/* Initialize the global variable fsl_otg_dev and request IRQ for OTG */ -static int fsl_otg_conf(struct platform_device *pdev) -{ - struct fsl_otg *fsl_otg_tc; - int status; - - if (fsl_otg_dev) - return 0; - - /* allocate space to fsl otg device */ - fsl_otg_tc = kzalloc(sizeof(struct fsl_otg), GFP_KERNEL); - if (!fsl_otg_tc) - return -ENOMEM; - - fsl_otg_tc->phy.otg = kzalloc(sizeof(struct usb_otg), GFP_KERNEL); - if (!fsl_otg_tc->phy.otg) { - kfree(fsl_otg_tc); - return -ENOMEM; - } - - INIT_DELAYED_WORK(&fsl_otg_tc->otg_event, fsl_otg_event); - - INIT_LIST_HEAD(&active_timers); - status = fsl_otg_init_timers(&fsl_otg_tc->fsm); - if (status) { - pr_info("Couldn't init OTG timers\n"); - goto err; - } - spin_lock_init(&fsl_otg_tc->fsm.lock); - - /* Set OTG state machine operations */ - fsl_otg_tc->fsm.ops = &fsl_otg_ops; - - /* initialize the otg structure */ - fsl_otg_tc->phy.label = DRIVER_DESC; - fsl_otg_tc->phy.set_power = fsl_otg_set_power; - - fsl_otg_tc->phy.otg->phy = &fsl_otg_tc->phy; - fsl_otg_tc->phy.otg->set_host = fsl_otg_set_host; - fsl_otg_tc->phy.otg->set_peripheral = fsl_otg_set_peripheral; - fsl_otg_tc->phy.otg->start_hnp = fsl_otg_start_hnp; - fsl_otg_tc->phy.otg->start_srp = fsl_otg_start_srp; - - fsl_otg_dev = fsl_otg_tc; - - /* Store the otg transceiver */ - status = usb_add_phy(&fsl_otg_tc->phy, USB_PHY_TYPE_USB2); - if (status) { - pr_warn(FSL_OTG_NAME ": unable to register OTG transceiver.\n"); - goto err; - } - - return 0; -err: - fsl_otg_uninit_timers(); - kfree(fsl_otg_tc->phy.otg); - kfree(fsl_otg_tc); - return status; -} - -/* OTG Initialization */ -int usb_otg_start(struct platform_device *pdev) -{ - struct fsl_otg *p_otg; - struct usb_phy *otg_trans = usb_get_phy(USB_PHY_TYPE_USB2); - struct otg_fsm *fsm; - int status; - struct resource *res; - u32 temp; - struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; - - p_otg = container_of(otg_trans, struct fsl_otg, phy); - fsm = &p_otg->fsm; - - /* Initialize the state machine structure with default values */ - SET_OTG_STATE(otg_trans, OTG_STATE_UNDEFINED); - fsm->otg = p_otg->phy.otg; - - /* We don't require predefined MEM/IRQ resource index */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENXIO; - - /* We don't request_mem_region here to enable resource sharing - * with host/device */ - - usb_dr_regs = ioremap(res->start, sizeof(struct usb_dr_mmap)); - p_otg->dr_mem_map = (struct usb_dr_mmap *)usb_dr_regs; - pdata->regs = (void *)usb_dr_regs; - - if (pdata->init && pdata->init(pdev) != 0) - return -EINVAL; - - if (pdata->big_endian_mmio) { - _fsl_readl = _fsl_readl_be; - _fsl_writel = _fsl_writel_be; - } else { - _fsl_readl = _fsl_readl_le; - _fsl_writel = _fsl_writel_le; - } - - /* request irq */ - p_otg->irq = platform_get_irq(pdev, 0); - status = request_irq(p_otg->irq, fsl_otg_isr, - IRQF_SHARED, driver_name, p_otg); - if (status) { - dev_dbg(p_otg->phy.dev, "can't get IRQ %d, error %d\n", - p_otg->irq, status); - iounmap(p_otg->dr_mem_map); - kfree(p_otg->phy.otg); - kfree(p_otg); - return status; - } - - /* stop the controller */ - temp = fsl_readl(&p_otg->dr_mem_map->usbcmd); - temp &= ~USB_CMD_RUN_STOP; - fsl_writel(temp, &p_otg->dr_mem_map->usbcmd); - - /* reset the controller */ - temp = fsl_readl(&p_otg->dr_mem_map->usbcmd); - temp |= USB_CMD_CTRL_RESET; - fsl_writel(temp, &p_otg->dr_mem_map->usbcmd); - - /* wait reset completed */ - while (fsl_readl(&p_otg->dr_mem_map->usbcmd) & USB_CMD_CTRL_RESET) - ; - - /* configure the VBUSHS as IDLE(both host and device) */ - temp = USB_MODE_STREAM_DISABLE | (pdata->es ? USB_MODE_ES : 0); - fsl_writel(temp, &p_otg->dr_mem_map->usbmode); - - /* configure PHY interface */ - temp = fsl_readl(&p_otg->dr_mem_map->portsc); - temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW); - switch (pdata->phy_mode) { - case FSL_USB2_PHY_ULPI: - temp |= PORTSC_PTS_ULPI; - break; - case FSL_USB2_PHY_UTMI_WIDE: - temp |= PORTSC_PTW_16BIT; - /* fall through */ - case FSL_USB2_PHY_UTMI: - temp |= PORTSC_PTS_UTMI; - /* fall through */ - default: - break; - } - fsl_writel(temp, &p_otg->dr_mem_map->portsc); - - if (pdata->have_sysif_regs) { - /* configure control enable IO output, big endian register */ - temp = __raw_readl(&p_otg->dr_mem_map->control); - temp |= USB_CTRL_IOENB; - __raw_writel(temp, &p_otg->dr_mem_map->control); - } - - /* disable all interrupt and clear all OTGSC status */ - temp = fsl_readl(&p_otg->dr_mem_map->otgsc); - temp &= ~OTGSC_INTERRUPT_ENABLE_BITS_MASK; - temp |= OTGSC_INTERRUPT_STATUS_BITS_MASK | OTGSC_CTRL_VBUS_DISCHARGE; - fsl_writel(temp, &p_otg->dr_mem_map->otgsc); - - /* - * The identification (id) input is FALSE when a Mini-A plug is inserted - * in the devices Mini-AB receptacle. Otherwise, this input is TRUE. - * Also: record initial state of ID pin - */ - if (fsl_readl(&p_otg->dr_mem_map->otgsc) & OTGSC_STS_USB_ID) { - p_otg->phy.state = OTG_STATE_UNDEFINED; - p_otg->fsm.id = 1; - } else { - p_otg->phy.state = OTG_STATE_A_IDLE; - p_otg->fsm.id = 0; - } - - DBG("initial ID pin=%d\n", p_otg->fsm.id); - - /* enable OTG ID pin interrupt */ - temp = fsl_readl(&p_otg->dr_mem_map->otgsc); - temp |= OTGSC_INTR_USB_ID_EN; - temp &= ~(OTGSC_CTRL_VBUS_DISCHARGE | OTGSC_INTR_1MS_TIMER_EN); - fsl_writel(temp, &p_otg->dr_mem_map->otgsc); - - return 0; -} - -/* - * state file in sysfs - */ -static int show_fsl_usb2_otg_state(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct otg_fsm *fsm = &fsl_otg_dev->fsm; - char *next = buf; - unsigned size = PAGE_SIZE; - unsigned long flags; - int t; - - spin_lock_irqsave(&fsm->lock, flags); - - /* basic driver infomation */ - t = scnprintf(next, size, - DRIVER_DESC "\n" "fsl_usb2_otg version: %s\n\n", - DRIVER_VERSION); - size -= t; - next += t; - - /* Registers */ - t = scnprintf(next, size, - "OTGSC: 0x%08x\n" - "PORTSC: 0x%08x\n" - "USBMODE: 0x%08x\n" - "USBCMD: 0x%08x\n" - "USBSTS: 0x%08x\n" - "USBINTR: 0x%08x\n", - fsl_readl(&usb_dr_regs->otgsc), - fsl_readl(&usb_dr_regs->portsc), - fsl_readl(&usb_dr_regs->usbmode), - fsl_readl(&usb_dr_regs->usbcmd), - fsl_readl(&usb_dr_regs->usbsts), - fsl_readl(&usb_dr_regs->usbintr)); - size -= t; - next += t; - - /* State */ - t = scnprintf(next, size, - "OTG state: %s\n\n", - otg_state_string(fsl_otg_dev->phy.state)); - size -= t; - next += t; - - /* State Machine Variables */ - t = scnprintf(next, size, - "a_bus_req: %d\n" - "b_bus_req: %d\n" - "a_bus_resume: %d\n" - "a_bus_suspend: %d\n" - "a_conn: %d\n" - "a_sess_vld: %d\n" - "a_srp_det: %d\n" - "a_vbus_vld: %d\n" - "b_bus_resume: %d\n" - "b_bus_suspend: %d\n" - "b_conn: %d\n" - "b_se0_srp: %d\n" - "b_sess_end: %d\n" - "b_sess_vld: %d\n" - "id: %d\n", - fsm->a_bus_req, - fsm->b_bus_req, - fsm->a_bus_resume, - fsm->a_bus_suspend, - fsm->a_conn, - fsm->a_sess_vld, - fsm->a_srp_det, - fsm->a_vbus_vld, - fsm->b_bus_resume, - fsm->b_bus_suspend, - fsm->b_conn, - fsm->b_se0_srp, - fsm->b_sess_end, - fsm->b_sess_vld, - fsm->id); - size -= t; - next += t; - - spin_unlock_irqrestore(&fsm->lock, flags); - - return PAGE_SIZE - size; -} - -static DEVICE_ATTR(fsl_usb2_otg_state, S_IRUGO, show_fsl_usb2_otg_state, NULL); - - -/* Char driver interface to control some OTG input */ - -/* - * Handle some ioctl command, such as get otg - * status and set host suspend - */ -static long fsl_otg_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - u32 retval = 0; - - switch (cmd) { - case GET_OTG_STATUS: - retval = fsl_otg_dev->host_working; - break; - - case SET_A_SUSPEND_REQ: - fsl_otg_dev->fsm.a_suspend_req = arg; - break; - - case SET_A_BUS_DROP: - fsl_otg_dev->fsm.a_bus_drop = arg; - break; - - case SET_A_BUS_REQ: - fsl_otg_dev->fsm.a_bus_req = arg; - break; - - case SET_B_BUS_REQ: - fsl_otg_dev->fsm.b_bus_req = arg; - break; - - default: - break; - } - - otg_statemachine(&fsl_otg_dev->fsm); - - return retval; -} - -static int fsl_otg_open(struct inode *inode, struct file *file) -{ - return 0; -} - -static int fsl_otg_release(struct inode *inode, struct file *file) -{ - return 0; -} - -static const struct file_operations otg_fops = { - .owner = THIS_MODULE, - .llseek = NULL, - .read = NULL, - .write = NULL, - .unlocked_ioctl = fsl_otg_ioctl, - .open = fsl_otg_open, - .release = fsl_otg_release, -}; - -static int fsl_otg_probe(struct platform_device *pdev) -{ - int ret; - - if (!pdev->dev.platform_data) - return -ENODEV; - - /* configure the OTG */ - ret = fsl_otg_conf(pdev); - if (ret) { - dev_err(&pdev->dev, "Couldn't configure OTG module\n"); - return ret; - } - - /* start OTG */ - ret = usb_otg_start(pdev); - if (ret) { - dev_err(&pdev->dev, "Can't init FSL OTG device\n"); - return ret; - } - - ret = register_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME, &otg_fops); - if (ret) { - dev_err(&pdev->dev, "unable to register FSL OTG device\n"); - return ret; - } - - ret = device_create_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state); - if (ret) - dev_warn(&pdev->dev, "Can't register sysfs attribute\n"); - - return ret; -} - -static int fsl_otg_remove(struct platform_device *pdev) -{ - struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data; - - usb_remove_phy(&fsl_otg_dev->phy); - free_irq(fsl_otg_dev->irq, fsl_otg_dev); - - iounmap((void *)usb_dr_regs); - - fsl_otg_uninit_timers(); - kfree(fsl_otg_dev->phy.otg); - kfree(fsl_otg_dev); - - device_remove_file(&pdev->dev, &dev_attr_fsl_usb2_otg_state); - - unregister_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME); - - if (pdata->exit) - pdata->exit(pdev); - - return 0; -} - -struct platform_driver fsl_otg_driver = { - .probe = fsl_otg_probe, - .remove = fsl_otg_remove, - .driver = { - .name = driver_name, - .owner = THIS_MODULE, - }, -}; - -module_platform_driver(fsl_otg_driver); - -MODULE_DESCRIPTION(DRIVER_INFO); -MODULE_AUTHOR(DRIVER_AUTHOR); -MODULE_LICENSE("GPL"); |