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authorLi Yang <leoli@freescale.com>2011-04-18 22:01:59 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-05-02 16:59:38 -0700
commit0807c500a1a6d7fa20cbd7bbe7fea14a66112463 (patch)
tree50dc77bc2e82912e42b8df92846a8a955176aabc /drivers/usb
parent2ea6698d7b9266da53044dddc5f6743adf097fb5 (diff)
downloadvexpress-lsk-0807c500a1a6d7fa20cbd7bbe7fea14a66112463.tar.gz
USB: add Freescale USB OTG Transceiver driver
Slightly reworked and cleaned up driver from Freescale LTIB for MPC5121E. The driver has been ported to the current kernel, proc interface "/proc/driver/fsl_usb2_otg" has been replaced by sysfs interface. Signed-off-by: Li Yang <leoli@freescale.com> Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/otg/Kconfig8
-rw-r--r--drivers/usb/otg/Makefile2
-rw-r--r--drivers/usb/otg/fsl_otg.c1169
-rw-r--r--drivers/usb/otg/fsl_otg.h406
-rw-r--r--drivers/usb/otg/otg_fsm.c349
-rw-r--r--drivers/usb/otg/otg_fsm.h154
6 files changed, 2088 insertions, 0 deletions
diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig
index daf3e5f1a0e..c66481ad98d 100644
--- a/drivers/usb/otg/Kconfig
+++ b/drivers/usb/otg/Kconfig
@@ -122,4 +122,12 @@ config AB8500_USB
This transceiver supports high and full speed devices plus,
in host mode, low speed.
+config FSL_USB2_OTG
+ bool "Freescale USB OTG Transceiver Driver"
+ depends on USB_EHCI_FSL && USB_GADGET_FSL_USB2
+ select USB_OTG
+ select USB_OTG_UTILS
+ help
+ Enable this to support Freescale USB OTG transceiver.
+
endif # USB || OTG
diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile
index e22d917de01..566655c5333 100644
--- a/drivers/usb/otg/Makefile
+++ b/drivers/usb/otg/Makefile
@@ -19,3 +19,5 @@ obj-$(CONFIG_USB_ULPI) += ulpi.o
obj-$(CONFIG_USB_ULPI_VIEWPORT) += ulpi_viewport.o
obj-$(CONFIG_USB_MSM_OTG) += msm_otg.o
obj-$(CONFIG_AB8500_USB) += ab8500-usb.o
+fsl_usb2_otg-objs := fsl_otg.o otg_fsm.o
+obj-$(CONFIG_FSL_USB2_OTG) += fsl_usb2_otg.o
diff --git a/drivers/usb/otg/fsl_otg.c b/drivers/usb/otg/fsl_otg.c
new file mode 100644
index 00000000000..0f420b25e9a
--- /dev/null
+++ b/drivers/usb/otg/fsl_otg.c
@@ -0,0 +1,1169 @@
+/*
+ * 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->otg.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->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 otg_transceiver *xceiv = fsm->transceiver;
+ struct device *dev;
+ struct fsl_otg *otg_dev = container_of(xceiv, struct fsl_otg, otg);
+ u32 retval = 0;
+
+ if (!xceiv->host)
+ return -ENODEV;
+ dev = xceiv->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 otg_transceiver *xceiv = fsm->transceiver;
+ struct device *dev;
+
+ if (!xceiv->gadget || !xceiv->gadget->dev.parent)
+ return -ENODEV;
+
+ VDBG("gadget %s\n", on ? "on" : "off");
+ dev = xceiv->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 otg_transceiver *otg_p, struct usb_bus *host)
+{
+ struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg);
+
+ if (!otg_p || otg_dev != fsl_otg_dev)
+ return -ENODEV;
+
+ otg_p->host = host;
+
+ otg_dev->fsm.a_bus_drop = 0;
+ otg_dev->fsm.a_bus_req = 1;
+
+ if (host) {
+ VDBG("host off......\n");
+
+ otg_p->host->otg_port = fsl_otg_initdata.otg_port;
+ otg_p->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_p->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 otg_transceiver *otg_p,
+ struct usb_gadget *gadget)
+{
+ struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg);
+
+ VDBG("otg_dev 0x%x\n", (int)otg_dev);
+ VDBG("fsl_otg_dev 0x%x\n", (int)fsl_otg_dev);
+
+ if (!otg_p || otg_dev != fsl_otg_dev)
+ return -ENODEV;
+
+ if (!gadget) {
+ if (!otg_dev->otg.default_a)
+ otg_p->gadget->ops->vbus_draw(otg_p->gadget, 0);
+ usb_gadget_vbus_disconnect(otg_dev->otg.gadget);
+ otg_dev->otg.gadget = 0;
+ otg_dev->fsm.b_bus_req = 0;
+ otg_statemachine(&otg_dev->fsm);
+ return 0;
+ }
+
+ otg_p->gadget = gadget;
+ otg_p->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 otg_transceiver *otg_p, unsigned mA)
+{
+ if (!fsl_otg_dev)
+ return -ENODEV;
+ if (otg_p->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 disconnnect
+ * 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 otg_transceiver *otg_p)
+{
+ struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg);
+
+ if (!otg_p || otg_dev != fsl_otg_dev
+ || otg_p->state != OTG_STATE_B_IDLE)
+ 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 otg_transceiver *otg_p)
+{
+ struct fsl_otg *otg_dev = container_of(otg_p, struct fsl_otg, otg);
+
+ if (!otg_p || 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 otg_transceiver *otg = &((struct fsl_otg *)dev_id)->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;
+
+ 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->otg.label = DRIVER_DESC;
+ fsl_otg_tc->otg.set_host = fsl_otg_set_host;
+ fsl_otg_tc->otg.set_peripheral = fsl_otg_set_peripheral;
+ fsl_otg_tc->otg.set_power = fsl_otg_set_power;
+ fsl_otg_tc->otg.start_hnp = fsl_otg_start_hnp;
+ fsl_otg_tc->otg.start_srp = fsl_otg_start_srp;
+
+ fsl_otg_dev = fsl_otg_tc;
+
+ /* Store the otg transceiver */
+ status = otg_set_transceiver(&fsl_otg_tc->otg);
+ 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);
+ return status;
+}
+
+/* OTG Initialization */
+int usb_otg_start(struct platform_device *pdev)
+{
+ struct fsl_otg *p_otg;
+ struct otg_transceiver *otg_trans = otg_get_transceiver();
+ 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, otg);
+ fsm = &p_otg->fsm;
+
+ /* Initialize the state machine structure with default values */
+ SET_OTG_STATE(otg_trans, OTG_STATE_UNDEFINED);
+ fsm->transceiver = &p_otg->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->otg.dev, "can't get IRQ %d, error %d\n",
+ p_otg->irq, status);
+ iounmap(p_otg->dr_mem_map);
+ 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->otg.state = OTG_STATE_UNDEFINED;
+ p_otg->fsm.id = 1;
+ } else {
+ p_otg->otg.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->otg.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 __devinit 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 __devexit fsl_otg_remove(struct platform_device *pdev)
+{
+ struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
+
+ otg_set_transceiver(NULL);
+ free_irq(fsl_otg_dev->irq, fsl_otg_dev);
+
+ iounmap((void *)usb_dr_regs);
+
+ fsl_otg_uninit_timers();
+ 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 = __devexit_p(fsl_otg_remove),
+ .driver = {
+ .name = driver_name,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init fsl_usb_otg_init(void)
+{
+ pr_info(DRIVER_INFO "\n");
+ return platform_driver_register(&fsl_otg_driver);
+}
+module_init(fsl_usb_otg_init);
+
+static void __exit fsl_usb_otg_exit(void)
+{
+ platform_driver_unregister(&fsl_otg_driver);
+}
+module_exit(fsl_usb_otg_exit);
+
+MODULE_DESCRIPTION(DRIVER_INFO);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/otg/fsl_otg.h b/drivers/usb/otg/fsl_otg.h
new file mode 100644
index 00000000000..3f8ef731aac
--- /dev/null
+++ b/drivers/usb/otg/fsl_otg.h
@@ -0,0 +1,406 @@
+/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
+ *
+ * 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 "otg_fsm.h"
+#include <linux/usb/otg.h>
+#include <linux/ioctl.h>
+
+/* USB Command Register Bit Masks */
+#define USB_CMD_RUN_STOP (0x1<<0)
+#define USB_CMD_CTRL_RESET (0x1<<1)
+#define USB_CMD_PERIODIC_SCHEDULE_EN (0x1<<4)
+#define USB_CMD_ASYNC_SCHEDULE_EN (0x1<<5)
+#define USB_CMD_INT_AA_DOORBELL (0x1<<6)
+#define USB_CMD_ASP (0x3<<8)
+#define USB_CMD_ASYNC_SCH_PARK_EN (0x1<<11)
+#define USB_CMD_SUTW (0x1<<13)
+#define USB_CMD_ATDTW (0x1<<14)
+#define USB_CMD_ITC (0xFF<<16)
+
+/* bit 15,3,2 are frame list size */
+#define USB_CMD_FRAME_SIZE_1024 (0x0<<15 | 0x0<<2)
+#define USB_CMD_FRAME_SIZE_512 (0x0<<15 | 0x1<<2)
+#define USB_CMD_FRAME_SIZE_256 (0x0<<15 | 0x2<<2)
+#define USB_CMD_FRAME_SIZE_128 (0x0<<15 | 0x3<<2)
+#define USB_CMD_FRAME_SIZE_64 (0x1<<15 | 0x0<<2)
+#define USB_CMD_FRAME_SIZE_32 (0x1<<15 | 0x1<<2)
+#define USB_CMD_FRAME_SIZE_16 (0x1<<15 | 0x2<<2)
+#define USB_CMD_FRAME_SIZE_8 (0x1<<15 | 0x3<<2)
+
+/* bit 9-8 are async schedule park mode count */
+#define USB_CMD_ASP_00 (0x0<<8)
+#define USB_CMD_ASP_01 (0x1<<8)
+#define USB_CMD_ASP_10 (0x2<<8)
+#define USB_CMD_ASP_11 (0x3<<8)
+#define USB_CMD_ASP_BIT_POS (8)
+
+/* bit 23-16 are interrupt threshold control */
+#define USB_CMD_ITC_NO_THRESHOLD (0x00<<16)
+#define USB_CMD_ITC_1_MICRO_FRM (0x01<<16)
+#define USB_CMD_ITC_2_MICRO_FRM (0x02<<16)
+#define USB_CMD_ITC_4_MICRO_FRM (0x04<<16)
+#define USB_CMD_ITC_8_MICRO_FRM (0x08<<16)
+#define USB_CMD_ITC_16_MICRO_FRM (0x10<<16)
+#define USB_CMD_ITC_32_MICRO_FRM (0x20<<16)
+#define USB_CMD_ITC_64_MICRO_FRM (0x40<<16)
+#define USB_CMD_ITC_BIT_POS (16)
+
+/* USB Status Register Bit Masks */
+#define USB_STS_INT (0x1<<0)
+#define USB_STS_ERR (0x1<<1)
+#define USB_STS_PORT_CHANGE (0x1<<2)
+#define USB_STS_FRM_LST_ROLL (0x1<<3)
+#define USB_STS_SYS_ERR (0x1<<4)
+#define USB_STS_IAA (0x1<<5)
+#define USB_STS_RESET_RECEIVED (0x1<<6)
+#define USB_STS_SOF (0x1<<7)
+#define USB_STS_DCSUSPEND (0x1<<8)
+#define USB_STS_HC_HALTED (0x1<<12)
+#define USB_STS_RCL (0x1<<13)
+#define USB_STS_PERIODIC_SCHEDULE (0x1<<14)
+#define USB_STS_ASYNC_SCHEDULE (0x1<<15)
+
+/* USB Interrupt Enable Register Bit Masks */
+#define USB_INTR_INT_EN (0x1<<0)
+#define USB_INTR_ERR_INT_EN (0x1<<1)
+#define USB_INTR_PC_DETECT_EN (0x1<<2)
+#define USB_INTR_FRM_LST_ROLL_EN (0x1<<3)
+#define USB_INTR_SYS_ERR_EN (0x1<<4)
+#define USB_INTR_ASYN_ADV_EN (0x1<<5)
+#define USB_INTR_RESET_EN (0x1<<6)
+#define USB_INTR_SOF_EN (0x1<<7)
+#define USB_INTR_DEVICE_SUSPEND (0x1<<8)
+
+/* Device Address bit masks */
+#define USB_DEVICE_ADDRESS_MASK (0x7F<<25)
+#define USB_DEVICE_ADDRESS_BIT_POS (25)
+/* PORTSC Register Bit Masks,Only one PORT in OTG mode*/
+#define PORTSC_CURRENT_CONNECT_STATUS (0x1<<0)
+#define PORTSC_CONNECT_STATUS_CHANGE (0x1<<1)
+#define PORTSC_PORT_ENABLE (0x1<<2)
+#define PORTSC_PORT_EN_DIS_CHANGE (0x1<<3)
+#define PORTSC_OVER_CURRENT_ACT (0x1<<4)
+#define PORTSC_OVER_CUURENT_CHG (0x1<<5)
+#define PORTSC_PORT_FORCE_RESUME (0x1<<6)
+#define PORTSC_PORT_SUSPEND (0x1<<7)
+#define PORTSC_PORT_RESET (0x1<<8)
+#define PORTSC_LINE_STATUS_BITS (0x3<<10)
+#define PORTSC_PORT_POWER (0x1<<12)
+#define PORTSC_PORT_INDICTOR_CTRL (0x3<<14)
+#define PORTSC_PORT_TEST_CTRL (0xF<<16)
+#define PORTSC_WAKE_ON_CONNECT_EN (0x1<<20)
+#define PORTSC_WAKE_ON_CONNECT_DIS (0x1<<21)
+#define PORTSC_WAKE_ON_OVER_CURRENT (0x1<<22)
+#define PORTSC_PHY_LOW_POWER_SPD (0x1<<23)
+#define PORTSC_PORT_FORCE_FULL_SPEED (0x1<<24)
+#define PORTSC_PORT_SPEED_MASK (0x3<<26)
+#define PORTSC_TRANSCEIVER_WIDTH (0x1<<28)
+#define PORTSC_PHY_TYPE_SEL (0x3<<30)
+/* bit 11-10 are line status */
+#define PORTSC_LINE_STATUS_SE0 (0x0<<10)
+#define PORTSC_LINE_STATUS_JSTATE (0x1<<10)
+#define PORTSC_LINE_STATUS_KSTATE (0x2<<10)
+#define PORTSC_LINE_STATUS_UNDEF (0x3<<10)
+#define PORTSC_LINE_STATUS_BIT_POS (10)
+
+/* bit 15-14 are port indicator control */
+#define PORTSC_PIC_OFF (0x0<<14)
+#define PORTSC_PIC_AMBER (0x1<<14)
+#define PORTSC_PIC_GREEN (0x2<<14)
+#define PORTSC_PIC_UNDEF (0x3<<14)
+#define PORTSC_PIC_BIT_POS (14)
+
+/* bit 19-16 are port test control */
+#define PORTSC_PTC_DISABLE (0x0<<16)
+#define PORTSC_PTC_JSTATE (0x1<<16)
+#define PORTSC_PTC_KSTATE (0x2<<16)
+#define PORTSC_PTC_SEQNAK (0x3<<16)
+#define PORTSC_PTC_PACKET (0x4<<16)
+#define PORTSC_PTC_FORCE_EN (0x5<<16)
+#define PORTSC_PTC_BIT_POS (16)
+
+/* bit 27-26 are port speed */
+#define PORTSC_PORT_SPEED_FULL (0x0<<26)
+#define PORTSC_PORT_SPEED_LOW (0x1<<26)
+#define PORTSC_PORT_SPEED_HIGH (0x2<<26)
+#define PORTSC_PORT_SPEED_UNDEF (0x3<<26)
+#define PORTSC_SPEED_BIT_POS (26)
+
+/* bit 28 is parallel transceiver width for UTMI interface */
+#define PORTSC_PTW (0x1<<28)
+#define PORTSC_PTW_8BIT (0x0<<28)
+#define PORTSC_PTW_16BIT (0x1<<28)
+
+/* bit 31-30 are port transceiver select */
+#define PORTSC_PTS_UTMI (0x0<<30)
+#define PORTSC_PTS_ULPI (0x2<<30)
+#define PORTSC_PTS_FSLS_SERIAL (0x3<<30)
+#define PORTSC_PTS_BIT_POS (30)
+
+#define PORTSC_W1C_BITS \
+ (PORTSC_CONNECT_STATUS_CHANGE | \
+ PORTSC_PORT_EN_DIS_CHANGE | \
+ PORTSC_OVER_CUURENT_CHG)
+
+/* OTG Status Control Register Bit Masks */
+#define OTGSC_CTRL_VBUS_DISCHARGE (0x1<<0)
+#define OTGSC_CTRL_VBUS_CHARGE (0x1<<1)
+#define OTGSC_CTRL_OTG_TERMINATION (0x1<<3)
+#define OTGSC_CTRL_DATA_PULSING (0x1<<4)
+#define OTGSC_CTRL_ID_PULL_EN (0x1<<5)
+#define OTGSC_HA_DATA_PULSE (0x1<<6)
+#define OTGSC_HA_BA (0x1<<7)
+#define OTGSC_STS_USB_ID (0x1<<8)
+#define OTGSC_STS_A_VBUS_VALID (0x1<<9)
+#define OTGSC_STS_A_SESSION_VALID (0x1<<10)
+#define OTGSC_STS_B_SESSION_VALID (0x1<<11)
+#define OTGSC_STS_B_SESSION_END (0x1<<12)
+#define OTGSC_STS_1MS_TOGGLE (0x1<<13)
+#define OTGSC_STS_DATA_PULSING (0x1<<14)
+#define OTGSC_INTSTS_USB_ID (0x1<<16)
+#define OTGSC_INTSTS_A_VBUS_VALID (0x1<<17)
+#define OTGSC_INTSTS_A_SESSION_VALID (0x1<<18)
+#define OTGSC_INTSTS_B_SESSION_VALID (0x1<<19)
+#define OTGSC_INTSTS_B_SESSION_END (0x1<<20)
+#define OTGSC_INTSTS_1MS (0x1<<21)
+#define OTGSC_INTSTS_DATA_PULSING (0x1<<22)
+#define OTGSC_INTR_USB_ID_EN (0x1<<24)
+#define OTGSC_INTR_A_VBUS_VALID_EN (0x1<<25)
+#define OTGSC_INTR_A_SESSION_VALID_EN (0x1<<26)
+#define OTGSC_INTR_B_SESSION_VALID_EN (0x1<<27)
+#define OTGSC_INTR_B_SESSION_END_EN (0x1<<28)
+#define OTGSC_INTR_1MS_TIMER_EN (0x1<<29)
+#define OTGSC_INTR_DATA_PULSING_EN (0x1<<30)
+#define OTGSC_INTSTS_MASK (0x00ff0000)
+
+/* USB MODE Register Bit Masks */
+#define USB_MODE_CTRL_MODE_IDLE (0x0<<0)
+#define USB_MODE_CTRL_MODE_DEVICE (0x2<<0)
+#define USB_MODE_CTRL_MODE_HOST (0x3<<0)
+#define USB_MODE_CTRL_MODE_RSV (0x1<<0)
+#define USB_MODE_SETUP_LOCK_OFF (0x1<<3)
+#define USB_MODE_STREAM_DISABLE (0x1<<4)
+#define USB_MODE_ES (0x1<<2) /* Endian Select */
+
+/* control Register Bit Masks */
+#define USB_CTRL_IOENB (0x1<<2)
+#define USB_CTRL_ULPI_INT0EN (0x1<<0)
+
+/* BCSR5 */
+#define BCSR5_INT_USB (0x02)
+
+/* USB module clk cfg */
+#define SCCR_OFFS (0xA08)
+#define SCCR_USB_CLK_DISABLE (0x00000000) /* USB clk disable */
+#define SCCR_USB_MPHCM_11 (0x00c00000)
+#define SCCR_USB_MPHCM_01 (0x00400000)
+#define SCCR_USB_MPHCM_10 (0x00800000)
+#define SCCR_USB_DRCM_11 (0x00300000)
+#define SCCR_USB_DRCM_01 (0x00100000)
+#define SCCR_USB_DRCM_10 (0x00200000)
+
+#define SICRL_OFFS (0x114)
+#define SICRL_USB0 (0x40000000)
+#define SICRL_USB1 (0x20000000)
+
+#define SICRH_OFFS (0x118)
+#define SICRH_USB_UTMI (0x00020000)
+
+/* OTG interrupt enable bit masks */
+#define OTGSC_INTERRUPT_ENABLE_BITS_MASK \
+ (OTGSC_INTR_USB_ID_EN | \
+ OTGSC_INTR_1MS_TIMER_EN | \
+ OTGSC_INTR_A_VBUS_VALID_EN | \
+ OTGSC_INTR_A_SESSION_VALID_EN | \
+ OTGSC_INTR_B_SESSION_VALID_EN | \
+ OTGSC_INTR_B_SESSION_END_EN | \
+ OTGSC_INTR_DATA_PULSING_EN)
+
+/* OTG interrupt status bit masks */
+#define OTGSC_INTERRUPT_STATUS_BITS_MASK \
+ (OTGSC_INTSTS_USB_ID | \
+ OTGSC_INTR_1MS_TIMER_EN | \
+ OTGSC_INTSTS_A_VBUS_VALID | \
+ OTGSC_INTSTS_A_SESSION_VALID | \
+ OTGSC_INTSTS_B_SESSION_VALID | \
+ OTGSC_INTSTS_B_SESSION_END | \
+ OTGSC_INTSTS_DATA_PULSING)
+
+/*
+ * A-DEVICE timing constants
+ */
+
+/* Wait for VBUS Rise */
+#define TA_WAIT_VRISE (100) /* a_wait_vrise 100 ms, section: 6.6.5.1 */
+
+/* Wait for B-Connect */
+#define TA_WAIT_BCON (10000) /* a_wait_bcon > 1 sec, section: 6.6.5.2
+ * This is only used to get out of
+ * OTG_STATE_A_WAIT_BCON state if there was
+ * no connection for these many milliseconds
+ */
+
+/* A-Idle to B-Disconnect */
+/* It is necessary for this timer to be more than 750 ms because of a bug in OPT
+ * test 5.4 in which B OPT disconnects after 750 ms instead of 75ms as stated
+ * in the test description
+ */
+#define TA_AIDL_BDIS (5000) /* a_suspend minimum 200 ms, section: 6.6.5.3 */
+
+/* B-Idle to A-Disconnect */
+#define TA_BIDL_ADIS (12) /* 3 to 200 ms */
+
+/* B-device timing constants */
+
+
+/* Data-Line Pulse Time*/
+#define TB_DATA_PLS (10) /* b_srp_init,continue 5~10ms, section:5.3.3 */
+#define TB_DATA_PLS_MIN (5) /* minimum 5 ms */
+#define TB_DATA_PLS_MAX (10) /* maximum 10 ms */
+
+/* SRP Initiate Time */
+#define TB_SRP_INIT (100) /* b_srp_init,maximum 100 ms, section:5.3.8 */
+
+/* SRP Fail Time */
+#define TB_SRP_FAIL (7000) /* b_srp_init,Fail time 5~30s, section:6.8.2.2*/
+
+/* SRP result wait time */
+#define TB_SRP_WAIT (60)
+
+/* VBus time */
+#define TB_VBUS_PLS (30) /* time to keep vbus pulsing asserted */
+
+/* Discharge time */
+/* This time should be less than 10ms. It varies from system to system. */
+#define TB_VBUS_DSCHRG (8)
+
+/* A-SE0 to B-Reset */
+#define TB_ASE0_BRST (20) /* b_wait_acon, mini 3.125 ms,section:6.8.2.4 */
+
+/* A bus suspend timer before we can switch to b_wait_aconn */
+#define TB_A_SUSPEND (7)
+#define TB_BUS_RESUME (12)
+
+/* SE0 Time Before SRP */
+#define TB_SE0_SRP (2) /* b_idle,minimum 2 ms, section:5.3.2 */
+
+#define SET_OTG_STATE(otg_ptr, newstate) ((otg_ptr)->state = newstate)
+
+struct usb_dr_mmap {
+ /* Capability register */
+ u8 res1[256];
+ u16 caplength; /* Capability Register Length */
+ u16 hciversion; /* Host Controller Interface Version */
+ u32 hcsparams; /* Host Controller Structual Parameters */
+ u32 hccparams; /* Host Controller Capability Parameters */
+ u8 res2[20];
+ u32 dciversion; /* Device Controller Interface Version */
+ u32 dccparams; /* Device Controller Capability Parameters */
+ u8 res3[24];
+ /* Operation register */
+ u32 usbcmd; /* USB Command Register */
+ u32 usbsts; /* USB Status Register */
+ u32 usbintr; /* USB Interrupt Enable Register */
+ u32 frindex; /* Frame Index Register */
+ u8 res4[4];
+ u32 deviceaddr; /* Device Address */
+ u32 endpointlistaddr; /* Endpoint List Address Register */
+ u8 res5[4];
+ u32 burstsize; /* Master Interface Data Burst Size Register */
+ u32 txttfilltuning; /* Transmit FIFO Tuning Controls Register */
+ u8 res6[8];
+ u32 ulpiview; /* ULPI register access */
+ u8 res7[12];
+ u32 configflag; /* Configure Flag Register */
+ u32 portsc; /* Port 1 Status and Control Register */
+ u8 res8[28];
+ u32 otgsc; /* On-The-Go Status and Control */
+ u32 usbmode; /* USB Mode Register */
+ u32 endptsetupstat; /* Endpoint Setup Status Register */
+ u32 endpointprime; /* Endpoint Initialization Register */
+ u32 endptflush; /* Endpoint Flush Register */
+ u32 endptstatus; /* Endpoint Status Register */
+ u32 endptcomplete; /* Endpoint Complete Register */
+ u32 endptctrl[6]; /* Endpoint Control Registers */
+ u8 res9[552];
+ u32 snoop1;
+ u32 snoop2;
+ u32 age_cnt_thresh; /* Age Count Threshold Register */
+ u32 pri_ctrl; /* Priority Control Register */
+ u32 si_ctrl; /* System Interface Control Register */
+ u8 res10[236];
+ u32 control; /* General Purpose Control Register */
+};
+
+struct fsl_otg_timer {
+ unsigned long expires; /* Number of count increase to timeout */
+ unsigned long count; /* Tick counter */
+ void (*function)(unsigned long); /* Timeout function */
+ unsigned long data; /* Data passed to function */
+ struct list_head list;
+};
+
+inline struct fsl_otg_timer *otg_timer_initializer
+(void (*function)(unsigned long), unsigned long expires, unsigned long data)
+{
+ struct fsl_otg_timer *timer;
+
+ timer = kmalloc(sizeof(struct fsl_otg_timer), GFP_KERNEL);
+ if (!timer)
+ return NULL;
+ timer->function = function;
+ timer->expires = expires;
+ timer->data = data;
+ return timer;
+}
+
+struct fsl_otg {
+ struct otg_transceiver otg;
+ struct otg_fsm fsm;
+ struct usb_dr_mmap *dr_mem_map;
+ struct delayed_work otg_event;
+
+ /* used for usb host */
+ struct work_struct work_wq;
+ u8 host_working;
+
+ int irq;
+};
+
+struct fsl_otg_config {
+ u8 otg_port;
+};
+
+/* For SRP and HNP handle */
+#define FSL_OTG_MAJOR 240
+#define FSL_OTG_NAME "fsl-usb2-otg"
+/* Command to OTG driver ioctl */
+#define OTG_IOCTL_MAGIC FSL_OTG_MAJOR
+/* if otg work as host, it should return 1, otherwise return 0 */
+#define GET_OTG_STATUS _IOR(OTG_IOCTL_MAGIC, 1, int)
+#define SET_A_SUSPEND_REQ _IOW(OTG_IOCTL_MAGIC, 2, int)
+#define SET_A_BUS_DROP _IOW(OTG_IOCTL_MAGIC, 3, int)
+#define SET_A_BUS_REQ _IOW(OTG_IOCTL_MAGIC, 4, int)
+#define SET_B_BUS_REQ _IOW(OTG_IOCTL_MAGIC, 5, int)
+#define GET_A_SUSPEND_REQ _IOR(OTG_IOCTL_MAGIC, 6, int)
+#define GET_A_BUS_DROP _IOR(OTG_IOCTL_MAGIC, 7, int)
+#define GET_A_BUS_REQ _IOR(OTG_IOCTL_MAGIC, 8, int)
+#define GET_B_BUS_REQ _IOR(OTG_IOCTL_MAGIC, 9, int)
+
+void fsl_otg_add_timer(void *timer);
+void fsl_otg_del_timer(void *timer);
+void fsl_otg_pulse_vbus(void);
diff --git a/drivers/usb/otg/otg_fsm.c b/drivers/usb/otg/otg_fsm.c
new file mode 100644
index 00000000000..b0cc422f2ff
--- /dev/null
+++ b/drivers/usb/otg/otg_fsm.c
@@ -0,0 +1,349 @@
+/*
+ * OTG Finite State Machine from OTG spec
+ *
+ * Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
+ *
+ * Author: Li Yang <LeoLi@freescale.com>
+ * Jerry Huang <Chang-Ming.Huang@freescale.com>
+ *
+ * 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/kernel.h>
+#include <linux/types.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/usb.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/types.h>
+
+#include "otg_fsm.h"
+
+/* Change USB protocol when there is a protocol change */
+static int otg_set_protocol(struct otg_fsm *fsm, int protocol)
+{
+ int ret = 0;
+
+ if (fsm->protocol != protocol) {
+ VDBG("Changing role fsm->protocol= %d; new protocol= %d\n",
+ fsm->protocol, protocol);
+ /* stop old protocol */
+ if (fsm->protocol == PROTO_HOST)
+ ret = fsm->ops->start_host(fsm, 0);
+ else if (fsm->protocol == PROTO_GADGET)
+ ret = fsm->ops->start_gadget(fsm, 0);
+ if (ret)
+ return ret;
+
+ /* start new protocol */
+ if (protocol == PROTO_HOST)
+ ret = fsm->ops->start_host(fsm, 1);
+ else if (protocol == PROTO_GADGET)
+ ret = fsm->ops->start_gadget(fsm, 1);
+ if (ret)
+ return ret;
+
+ fsm->protocol = protocol;
+ return 0;
+ }
+
+ return 0;
+}
+
+static int state_changed;
+
+/* Called when leaving a state. Do state clean up jobs here */
+void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
+{
+ switch (old_state) {
+ case OTG_STATE_B_IDLE:
+ otg_del_timer(fsm, b_se0_srp_tmr);
+ fsm->b_se0_srp = 0;
+ break;
+ case OTG_STATE_B_SRP_INIT:
+ fsm->b_srp_done = 0;
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ break;
+ case OTG_STATE_B_WAIT_ACON:
+ otg_del_timer(fsm, b_ase0_brst_tmr);
+ fsm->b_ase0_brst_tmout = 0;
+ break;
+ case OTG_STATE_B_HOST:
+ break;
+ case OTG_STATE_A_IDLE:
+ break;
+ case OTG_STATE_A_WAIT_VRISE:
+ otg_del_timer(fsm, a_wait_vrise_tmr);
+ fsm->a_wait_vrise_tmout = 0;
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ otg_del_timer(fsm, a_wait_bcon_tmr);
+ fsm->a_wait_bcon_tmout = 0;
+ break;
+ case OTG_STATE_A_HOST:
+ otg_del_timer(fsm, a_wait_enum_tmr);
+ break;
+ case OTG_STATE_A_SUSPEND:
+ otg_del_timer(fsm, a_aidl_bdis_tmr);
+ fsm->a_aidl_bdis_tmout = 0;
+ fsm->a_suspend_req = 0;
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ otg_del_timer(fsm, a_wait_vrise_tmr);
+ break;
+ case OTG_STATE_A_VBUS_ERR:
+ break;
+ default:
+ break;
+ }
+}
+
+/* Called when entering a state */
+int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
+{
+ state_changed = 1;
+ if (fsm->transceiver->state == new_state)
+ return 0;
+ VDBG("Set state: %s\n", otg_state_string(new_state));
+ otg_leave_state(fsm, fsm->transceiver->state);
+ switch (new_state) {
+ case OTG_STATE_B_IDLE:
+ otg_drv_vbus(fsm, 0);
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_UNDEF);
+ otg_add_timer(fsm, b_se0_srp_tmr);
+ break;
+ case OTG_STATE_B_SRP_INIT:
+ otg_start_pulse(fsm);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_UNDEF);
+ otg_add_timer(fsm, b_srp_fail_tmr);
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 1);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_GADGET);
+ break;
+ case OTG_STATE_B_WAIT_ACON:
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ otg_add_timer(fsm, b_ase0_brst_tmr);
+ fsm->a_bus_suspend = 0;
+ break;
+ case OTG_STATE_B_HOST:
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 1);
+ otg_set_protocol(fsm, PROTO_HOST);
+ usb_bus_start_enum(fsm->transceiver->host,
+ fsm->transceiver->host->otg_port);
+ break;
+ case OTG_STATE_A_IDLE:
+ otg_drv_vbus(fsm, 0);
+ otg_chrg_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ break;
+ case OTG_STATE_A_WAIT_VRISE:
+ otg_drv_vbus(fsm, 1);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ otg_add_timer(fsm, a_wait_vrise_tmr);
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ otg_drv_vbus(fsm, 1);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ otg_add_timer(fsm, a_wait_bcon_tmr);
+ break;
+ case OTG_STATE_A_HOST:
+ otg_drv_vbus(fsm, 1);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 1);
+ otg_set_protocol(fsm, PROTO_HOST);
+ /*
+ * When HNP is triggered while a_bus_req = 0, a_host will
+ * suspend too fast to complete a_set_b_hnp_en
+ */
+ if (!fsm->a_bus_req || fsm->a_suspend_req)
+ otg_add_timer(fsm, a_wait_enum_tmr);
+ break;
+ case OTG_STATE_A_SUSPEND:
+ otg_drv_vbus(fsm, 1);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ otg_add_timer(fsm, a_aidl_bdis_tmr);
+
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ otg_loc_conn(fsm, 1);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_GADGET);
+ otg_drv_vbus(fsm, 1);
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ otg_drv_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_HOST);
+ break;
+ case OTG_STATE_A_VBUS_ERR:
+ otg_drv_vbus(fsm, 0);
+ otg_loc_conn(fsm, 0);
+ otg_loc_sof(fsm, 0);
+ otg_set_protocol(fsm, PROTO_UNDEF);
+ break;
+ default:
+ break;
+ }
+
+ fsm->transceiver->state = new_state;
+ return 0;
+}
+
+/* State change judgement */
+int otg_statemachine(struct otg_fsm *fsm)
+{
+ enum usb_otg_state state;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fsm->lock, flags);
+
+ state = fsm->transceiver->state;
+ state_changed = 0;
+ /* State machine state change judgement */
+
+ switch (state) {
+ case OTG_STATE_UNDEFINED:
+ VDBG("fsm->id = %d\n", fsm->id);
+ if (fsm->id)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else
+ otg_set_state(fsm, OTG_STATE_A_IDLE);
+ break;
+ case OTG_STATE_B_IDLE:
+ if (!fsm->id)
+ otg_set_state(fsm, OTG_STATE_A_IDLE);
+ else if (fsm->b_sess_vld && fsm->transceiver->gadget)
+ otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
+ else if (fsm->b_bus_req && fsm->b_sess_end && fsm->b_se0_srp)
+ otg_set_state(fsm, OTG_STATE_B_SRP_INIT);
+ break;
+ case OTG_STATE_B_SRP_INIT:
+ if (!fsm->id || fsm->b_srp_done)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ break;
+ case OTG_STATE_B_PERIPHERAL:
+ if (!fsm->id || !fsm->b_sess_vld)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else if (fsm->b_bus_req && fsm->transceiver->
+ gadget->b_hnp_enable && fsm->a_bus_suspend)
+ otg_set_state(fsm, OTG_STATE_B_WAIT_ACON);
+ break;
+ case OTG_STATE_B_WAIT_ACON:
+ if (fsm->a_conn)
+ otg_set_state(fsm, OTG_STATE_B_HOST);
+ else if (!fsm->id || !fsm->b_sess_vld)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else if (fsm->a_bus_resume || fsm->b_ase0_brst_tmout) {
+ fsm->b_ase0_brst_tmout = 0;
+ otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
+ }
+ break;
+ case OTG_STATE_B_HOST:
+ if (!fsm->id || !fsm->b_sess_vld)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else if (!fsm->b_bus_req || !fsm->a_conn)
+ otg_set_state(fsm, OTG_STATE_B_PERIPHERAL);
+ break;
+ case OTG_STATE_A_IDLE:
+ if (fsm->id)
+ otg_set_state(fsm, OTG_STATE_B_IDLE);
+ else if (!fsm->a_bus_drop && (fsm->a_bus_req || fsm->a_srp_det))
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VRISE);
+ break;
+ case OTG_STATE_A_WAIT_VRISE:
+ if (fsm->id || fsm->a_bus_drop || fsm->a_vbus_vld ||
+ fsm->a_wait_vrise_tmout) {
+ otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+ }
+ break;
+ case OTG_STATE_A_WAIT_BCON:
+ if (!fsm->a_vbus_vld)
+ otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+ else if (fsm->b_conn)
+ otg_set_state(fsm, OTG_STATE_A_HOST);
+ else if (fsm->id | fsm->a_bus_drop | fsm->a_wait_bcon_tmout)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+ break;
+ case OTG_STATE_A_HOST:
+ if ((!fsm->a_bus_req || fsm->a_suspend_req) &&
+ fsm->transceiver->host->b_hnp_enable)
+ otg_set_state(fsm, OTG_STATE_A_SUSPEND);
+ else if (fsm->id || !fsm->b_conn || fsm->a_bus_drop)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+ else if (!fsm->a_vbus_vld)
+ otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+ break;
+ case OTG_STATE_A_SUSPEND:
+ if (!fsm->b_conn && fsm->transceiver->host->b_hnp_enable)
+ otg_set_state(fsm, OTG_STATE_A_PERIPHERAL);
+ else if (!fsm->b_conn && !fsm->transceiver->host->b_hnp_enable)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+ else if (fsm->a_bus_req || fsm->b_bus_resume)
+ otg_set_state(fsm, OTG_STATE_A_HOST);
+ else if (fsm->id || fsm->a_bus_drop || fsm->a_aidl_bdis_tmout)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+ else if (!fsm->a_vbus_vld)
+ otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+ break;
+ case OTG_STATE_A_PERIPHERAL:
+ if (fsm->id || fsm->a_bus_drop)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+ else if (fsm->b_bus_suspend)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_BCON);
+ else if (!fsm->a_vbus_vld)
+ otg_set_state(fsm, OTG_STATE_A_VBUS_ERR);
+ break;
+ case OTG_STATE_A_WAIT_VFALL:
+ if (fsm->id || fsm->a_bus_req || (!fsm->a_sess_vld &&
+ !fsm->b_conn))
+ otg_set_state(fsm, OTG_STATE_A_IDLE);
+ break;
+ case OTG_STATE_A_VBUS_ERR:
+ if (fsm->id || fsm->a_bus_drop || fsm->a_clr_err)
+ otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL);
+ break;
+ default:
+ break;
+ }
+ spin_unlock_irqrestore(&fsm->lock, flags);
+
+ VDBG("quit statemachine, changed = %d\n", state_changed);
+ return state_changed;
+}
diff --git a/drivers/usb/otg/otg_fsm.h b/drivers/usb/otg/otg_fsm.h
new file mode 100644
index 00000000000..0cecf1d593a
--- /dev/null
+++ b/drivers/usb/otg/otg_fsm.h
@@ -0,0 +1,154 @@
+/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc.
+ *
+ * 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.
+ */
+
+#undef DEBUG
+#undef VERBOSE
+
+#ifdef DEBUG
+#define DBG(fmt, args...) printk(KERN_DEBUG "[%s] " fmt , \
+ __func__, ## args)
+#else
+#define DBG(fmt, args...) do {} while (0)
+#endif
+
+#ifdef VERBOSE
+#define VDBG DBG
+#else
+#define VDBG(stuff...) do {} while (0)
+#endif
+
+#ifdef VERBOSE
+#define MPC_LOC printk("Current Location [%s]:[%d]\n", __FILE__, __LINE__)
+#else
+#define MPC_LOC do {} while (0)
+#endif
+
+#define PROTO_UNDEF (0)
+#define PROTO_HOST (1)
+#define PROTO_GADGET (2)
+
+/* OTG state machine according to the OTG spec */
+struct otg_fsm {
+ /* Input */
+ int a_bus_resume;
+ int a_bus_suspend;
+ int a_conn;
+ int a_sess_vld;
+ int a_srp_det;
+ int a_vbus_vld;
+ int b_bus_resume;
+ int b_bus_suspend;
+ int b_conn;
+ int b_se0_srp;
+ int b_sess_end;
+ int b_sess_vld;
+ int id;
+
+ /* Internal variables */
+ int a_set_b_hnp_en;
+ int b_srp_done;
+ int b_hnp_enable;
+
+ /* Timeout indicator for timers */
+ int a_wait_vrise_tmout;
+ int a_wait_bcon_tmout;
+ int a_aidl_bdis_tmout;
+ int b_ase0_brst_tmout;
+
+ /* Informative variables */
+ int a_bus_drop;
+ int a_bus_req;
+ int a_clr_err;
+ int a_suspend_req;
+ int b_bus_req;
+
+ /* Output */
+ int drv_vbus;
+ int loc_conn;
+ int loc_sof;
+
+ struct otg_fsm_ops *ops;
+ struct otg_transceiver *transceiver;
+
+ /* Current usb protocol used: 0:undefine; 1:host; 2:client */
+ int protocol;
+ spinlock_t lock;
+};
+
+struct otg_fsm_ops {
+ void (*chrg_vbus)(int on);
+ void (*drv_vbus)(int on);
+ void (*loc_conn)(int on);
+ void (*loc_sof)(int on);
+ void (*start_pulse)(void);
+ void (*add_timer)(void *timer);
+ void (*del_timer)(void *timer);
+ int (*start_host)(struct otg_fsm *fsm, int on);
+ int (*start_gadget)(struct otg_fsm *fsm, int on);
+};
+
+
+static inline void otg_chrg_vbus(struct otg_fsm *fsm, int on)
+{
+ fsm->ops->chrg_vbus(on);
+}
+
+static inline void otg_drv_vbus(struct otg_fsm *fsm, int on)
+{
+ if (fsm->drv_vbus != on) {
+ fsm->drv_vbus = on;
+ fsm->ops->drv_vbus(on);
+ }
+}
+
+static inline void otg_loc_conn(struct otg_fsm *fsm, int on)
+{
+ if (fsm->loc_conn != on) {
+ fsm->loc_conn = on;
+ fsm->ops->loc_conn(on);
+ }
+}
+
+static inline void otg_loc_sof(struct otg_fsm *fsm, int on)
+{
+ if (fsm->loc_sof != on) {
+ fsm->loc_sof = on;
+ fsm->ops->loc_sof(on);
+ }
+}
+
+static inline void otg_start_pulse(struct otg_fsm *fsm)
+{
+ fsm->ops->start_pulse();
+}
+
+static inline void otg_add_timer(struct otg_fsm *fsm, void *timer)
+{
+ fsm->ops->add_timer(timer);
+}
+
+static inline void otg_del_timer(struct otg_fsm *fsm, void *timer)
+{
+ fsm->ops->del_timer(timer);
+}
+
+int otg_statemachine(struct otg_fsm *fsm);
+
+/* Defined by device specific driver, for different timer implementation */
+extern struct fsl_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr,
+ *a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr, *b_srp_fail_tmr,
+ *a_wait_enum_tmr;