diff options
Diffstat (limited to 'drivers/usb/otg/langwell_otg.c')
| -rw-r--r-- | drivers/usb/otg/langwell_otg.c | 1915 |
1 files changed, 1915 insertions, 0 deletions
diff --git a/drivers/usb/otg/langwell_otg.c b/drivers/usb/otg/langwell_otg.c new file mode 100644 index 00000000000..6f628d0e9f3 --- /dev/null +++ b/drivers/usb/otg/langwell_otg.c @@ -0,0 +1,1915 @@ +/* + * Intel Langwell USB OTG transceiver driver + * Copyright (C) 2008 - 2009, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + * + */ +/* This driver helps to switch Langwell OTG controller function between host + * and peripheral. It works with EHCI driver and Langwell client controller + * driver together. + */ +#include <linux/module.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/moduleparam.h> +#include <linux/usb/ch9.h> +#include <linux/usb/gadget.h> +#include <linux/usb.h> +#include <linux/usb/otg.h> +#include <linux/notifier.h> +#include <asm/ipc_defs.h> +#include <linux/delay.h> +#include "../core/hcd.h" + +#include <linux/usb/langwell_otg.h> + +#define DRIVER_DESC "Intel Langwell USB OTG transceiver driver" +#define DRIVER_VERSION "3.0.0.32L.0002" + +MODULE_DESCRIPTION(DRIVER_DESC); +MODULE_AUTHOR("Henry Yuan <hang.yuan@intel.com>, Hao Wu <hao.wu@intel.com>"); +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL"); + +static const char driver_name[] = "langwell_otg"; + +static int langwell_otg_probe(struct pci_dev *pdev, + const struct pci_device_id *id); +static void langwell_otg_remove(struct pci_dev *pdev); +static int langwell_otg_suspend(struct pci_dev *pdev, pm_message_t message); +static int langwell_otg_resume(struct pci_dev *pdev); + +static int langwell_otg_set_host(struct otg_transceiver *otg, + struct usb_bus *host); +static int langwell_otg_set_peripheral(struct otg_transceiver *otg, + struct usb_gadget *gadget); +static int langwell_otg_start_srp(struct otg_transceiver *otg); + +static const struct pci_device_id pci_ids[] = {{ + .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), + .class_mask = ~0, + .vendor = 0x8086, + .device = 0x0811, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, +}, { /* end: all zeroes */ } +}; + +static struct pci_driver otg_pci_driver = { + .name = (char *) driver_name, + .id_table = pci_ids, + + .probe = langwell_otg_probe, + .remove = langwell_otg_remove, + + .suspend = langwell_otg_suspend, + .resume = langwell_otg_resume, +}; + +static const char *state_string(enum usb_otg_state state) +{ + switch (state) { + case OTG_STATE_A_IDLE: + return "a_idle"; + case OTG_STATE_A_WAIT_VRISE: + return "a_wait_vrise"; + case OTG_STATE_A_WAIT_BCON: + return "a_wait_bcon"; + case OTG_STATE_A_HOST: + return "a_host"; + case OTG_STATE_A_SUSPEND: + return "a_suspend"; + case OTG_STATE_A_PERIPHERAL: + return "a_peripheral"; + case OTG_STATE_A_WAIT_VFALL: + return "a_wait_vfall"; + case OTG_STATE_A_VBUS_ERR: + return "a_vbus_err"; + case OTG_STATE_B_IDLE: + return "b_idle"; + case OTG_STATE_B_SRP_INIT: + return "b_srp_init"; + case OTG_STATE_B_PERIPHERAL: + return "b_peripheral"; + case OTG_STATE_B_WAIT_ACON: + return "b_wait_acon"; + case OTG_STATE_B_HOST: + return "b_host"; + default: + return "UNDEFINED"; + } +} + +/* HSM timers */ +static inline struct langwell_otg_timer *otg_timer_initializer +(void (*function)(unsigned long), unsigned long expires, unsigned long data) +{ + struct langwell_otg_timer *timer; + timer = kmalloc(sizeof(struct langwell_otg_timer), GFP_KERNEL); + timer->function = function; + timer->expires = expires; + timer->data = data; + return timer; +} + +static struct langwell_otg_timer *a_wait_vrise_tmr, *a_wait_bcon_tmr, + *a_aidl_bdis_tmr, *b_ase0_brst_tmr, *b_se0_srp_tmr, *b_srp_res_tmr, + *b_bus_suspend_tmr; + +static struct list_head active_timers; + +static struct langwell_otg *the_transceiver; + +/* host/client notify transceiver when event affects HNP state */ +void langwell_update_transceiver() +{ + otg_dbg("transceiver driver is notified\n"); + queue_work(the_transceiver->qwork, &the_transceiver->work); +} +EXPORT_SYMBOL(langwell_update_transceiver); + +static int langwell_otg_set_host(struct otg_transceiver *otg, + struct usb_bus *host) +{ + otg->host = host; + + return 0; +} + +static int langwell_otg_set_peripheral(struct otg_transceiver *otg, + struct usb_gadget *gadget) +{ + otg->gadget = gadget; + + return 0; +} + +static int langwell_otg_set_power(struct otg_transceiver *otg, + unsigned mA) +{ + return 0; +} + +/* A-device drives vbus, controlled through PMIC CHRGCNTL register*/ +static void langwell_otg_drv_vbus(int on) +{ + struct ipc_pmic_reg_data pmic_data = {0}; + struct ipc_pmic_reg_data battery_data; + + /* Check if battery is attached or not */ + battery_data.pmic_reg_data[0].register_address = 0xd2; + battery_data.ioc = 0; + battery_data.num_entries = 1; + if (ipc_pmic_register_read(&battery_data)) { + otg_dbg("Failed to read PMIC register 0xd2.\n"); + return; + } + + if ((battery_data.pmic_reg_data[0].value & 0x20) == 0) { + otg_dbg("no battery attached\n"); + return; + } + + /* Workaround for battery attachment issue */ + if (battery_data.pmic_reg_data[0].value == 0x34) { + otg_dbg("battery \n"); + return; + } + + otg_dbg("battery attached\n"); + + pmic_data.ioc = 0; + pmic_data.pmic_reg_data[0].register_address = 0xD4; + pmic_data.num_entries = 1; + if (on) + pmic_data.pmic_reg_data[0].value = 0x20; + else + pmic_data.pmic_reg_data[0].value = 0xc0; + + if (ipc_pmic_register_write(&pmic_data, TRUE)) + otg_dbg("Failed to write PMIC.\n"); + +} + +/* charge vbus or discharge vbus through a resistor to ground */ +static void langwell_otg_chrg_vbus(int on) +{ + + u32 val; + + val = readl(the_transceiver->regs + CI_OTGSC); + + if (on) + writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_VC, + the_transceiver->regs + CI_OTGSC); + else + writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_VD, + the_transceiver->regs + CI_OTGSC); + +} + +/* Start SRP */ +static int langwell_otg_start_srp(struct otg_transceiver *otg) +{ + u32 val; + + otg_dbg("Start SRP ->\n"); + + val = readl(the_transceiver->regs + CI_OTGSC); + + writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_HADP, + the_transceiver->regs + CI_OTGSC); + + /* Check if the data plus is finished or not */ + msleep(8); + val = readl(the_transceiver->regs + CI_OTGSC); + if (val & (OTGSC_HADP | OTGSC_DP)) + otg_dbg("DataLine SRP Error\n"); + + /* FIXME: VBus SRP */ + + return 0; +} + + +/* stop SOF via bus_suspend */ +static void langwell_otg_loc_sof(int on) +{ + struct usb_hcd *hcd; + int err; + + otg_dbg("loc_sof -> %d\n", on); + + hcd = bus_to_hcd(the_transceiver->otg.host); + if (on) + err = hcd->driver->bus_resume(hcd); + else + err = hcd->driver->bus_suspend(hcd); + + if (err) + otg_dbg("Failed to resume/suspend bus - %d\n", err); +} + +static void langwell_otg_phy_low_power(int on) +{ + u32 val; + + otg_dbg("phy low power mode-> %d\n", on); + + val = readl(the_transceiver->regs + CI_HOSTPC1); + if (on) + writel(val | HOSTPC1_PHCD, the_transceiver->regs + CI_HOSTPC1); + else + writel(val & ~HOSTPC1_PHCD, the_transceiver->regs + CI_HOSTPC1); +} + +/* Enable/Disable OTG interrupt */ +static void langwell_otg_intr(int on) +{ + u32 val; + + otg_dbg("interrupt -> %d\n", on); + + val = readl(the_transceiver->regs + CI_OTGSC); + if (on) { + val = val | (OTGSC_INTEN_MASK | OTGSC_IDPU); + writel(val, the_transceiver->regs + CI_OTGSC); + } else { + val = val & ~(OTGSC_INTEN_MASK | OTGSC_IDPU); + writel(val, the_transceiver->regs + CI_OTGSC); + } +} + +/* set HAAR: Hardware Assist Auto-Reset */ +static void langwell_otg_HAAR(int on) +{ + u32 val; + + otg_dbg("HAAR -> %d\n", on); + + val = readl(the_transceiver->regs + CI_OTGSC); + if (on) + writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_HAAR, + the_transceiver->regs + CI_OTGSC); + else + writel((val & ~OTGSC_INTSTS_MASK) & ~OTGSC_HAAR, + the_transceiver->regs + CI_OTGSC); +} + +/* set HABA: Hardware Assist B-Disconnect to A-Connect */ +static void langwell_otg_HABA(int on) +{ + u32 val; + + otg_dbg("HABA -> %d\n", on); + + val = readl(the_transceiver->regs + CI_OTGSC); + if (on) + writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_HABA, + the_transceiver->regs + CI_OTGSC); + else + writel((val & ~OTGSC_INTSTS_MASK) & ~OTGSC_HABA, + the_transceiver->regs + CI_OTGSC); +} + +static int langwell_otg_check_se0_srp(int on) +{ + u32 val; + + int delay_time = TB_SE0_SRP * 10; /* step is 100us */ + + otg_dbg("check_se0_srp -> \n"); + + do { + udelay(100); + if (!delay_time--) + break; + val = readl(the_transceiver->regs + CI_PORTSC1); + val &= PORTSC_LS; + } while (!val); + + otg_dbg("check_se0_srp <- \n"); + return val; +} + +/* The timeout callback function to set time out bit */ +static void set_tmout(unsigned long indicator) +{ + *(int *)indicator = 1; +} + +void langwell_otg_nsf_msg(unsigned long indicator) +{ + switch (indicator) { + case 2: + case 4: + case 6: + case 7: + printk(KERN_ERR "OTG:NSF-%lu - deivce not responding\n", + indicator); + break; + case 3: + printk(KERN_ERR "OTG:NSF-%lu - deivce not supported\n", + indicator); + break; + default: + printk(KERN_ERR "Do not have this kind of NSF\n"); + break; + } +} + +/* Initialize timers */ +static void langwell_otg_init_timers(struct otg_hsm *hsm) +{ + /* HSM used timers */ + a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE, + (unsigned long)&hsm->a_wait_vrise_tmout); + a_wait_bcon_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_BCON, + (unsigned long)&hsm->a_wait_bcon_tmout); + a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS, + (unsigned long)&hsm->a_aidl_bdis_tmout); + b_ase0_brst_tmr = otg_timer_initializer(&set_tmout, TB_ASE0_BRST, + (unsigned long)&hsm->b_ase0_brst_tmout); + b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP, + (unsigned long)&hsm->b_se0_srp); + b_srp_res_tmr = otg_timer_initializer(&set_tmout, TB_SRP_RES, + (unsigned long)&hsm->b_srp_res_tmout); + b_bus_suspend_tmr = otg_timer_initializer(&set_tmout, TB_BUS_SUSPEND, + (unsigned long)&hsm->b_bus_suspend_tmout); +} + +/* Free timers */ +static void langwell_otg_free_timers(void) +{ + kfree(a_wait_vrise_tmr); + kfree(a_wait_bcon_tmr); + kfree(a_aidl_bdis_tmr); + kfree(b_ase0_brst_tmr); + kfree(b_se0_srp_tmr); + kfree(b_srp_res_tmr); + kfree(b_bus_suspend_tmr); +} + +/* Add timer to timer list */ +static void langwell_otg_add_timer(void *gtimer) +{ + struct langwell_otg_timer *timer = (struct langwell_otg_timer *)gtimer; + struct langwell_otg_timer *tmp_timer; + u32 val32; + + /* 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; + + if (list_empty(&active_timers)) { + val32 = readl(the_transceiver->regs + CI_OTGSC); + writel(val32 | OTGSC_1MSE, the_transceiver->regs + CI_OTGSC); + } + + list_add_tail(&timer->list, &active_timers); +} + +/* Remove timer from the timer list; clear timeout status */ +static void langwell_otg_del_timer(void *gtimer) +{ + struct langwell_otg_timer *timer = (struct langwell_otg_timer *)gtimer; + struct langwell_otg_timer *tmp_timer, *del_tmp; + u32 val32; + + list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) + if (tmp_timer == timer) + list_del(&timer->list); + + if (list_empty(&active_timers)) { + val32 = readl(the_transceiver->regs + CI_OTGSC); + writel(val32 & ~OTGSC_1MSE, the_transceiver->regs + CI_OTGSC); + } +} + +/* Reduce timer count by 1, and find timeout conditions.*/ +static int langwell_otg_tick_timer(u32 *int_sts) +{ + struct langwell_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; + } + } + + if (list_empty(&active_timers)) { + otg_dbg("tick timer: disable 1ms int\n"); + *int_sts = *int_sts & ~OTGSC_1MSE; + } + return expired; +} + +static void reset_otg(void) +{ + u32 val; + int delay_time = 1000; + + otg_dbg("reseting OTG controller ...\n"); + val = readl(the_transceiver->regs + CI_USBCMD); + writel(val | USBCMD_RST, the_transceiver->regs + CI_USBCMD); + do { + udelay(100); + if (!delay_time--) + otg_dbg("reset timeout\n"); + val = readl(the_transceiver->regs + CI_USBCMD); + val &= USBCMD_RST; + } while (val != 0); + otg_dbg("reset done.\n"); +} + +static void set_host_mode(void) +{ + u32 val; + + reset_otg(); + val = readl(the_transceiver->regs + CI_USBMODE); + val = (val & (~USBMODE_CM)) | USBMODE_HOST; + writel(val, the_transceiver->regs + CI_USBMODE); +} + +static void set_client_mode(void) +{ + u32 val; + + reset_otg(); + val = readl(the_transceiver->regs + CI_USBMODE); + val = (val & (~USBMODE_CM)) | USBMODE_DEVICE; + writel(val, the_transceiver->regs + CI_USBMODE); +} + +static void init_hsm(void) +{ + struct langwell_otg *langwell = the_transceiver; + u32 val32; + + /* read OTGSC after reset */ + val32 = readl(langwell->regs + CI_OTGSC); + otg_dbg("%s: OTGSC init value = 0x%x\n", __func__, val32); + + /* set init state */ + if (val32 & OTGSC_ID) { + langwell->hsm.id = 1; + langwell->otg.default_a = 0; + set_client_mode(); + langwell->otg.state = OTG_STATE_B_IDLE; + langwell_otg_drv_vbus(0); + } else { + langwell->hsm.id = 0; + langwell->otg.default_a = 1; + set_host_mode(); + langwell->otg.state = OTG_STATE_A_IDLE; + } + + /* set session indicator */ + if (val32 & OTGSC_BSE) + langwell->hsm.b_sess_end = 1; + if (val32 & OTGSC_BSV) + langwell->hsm.b_sess_vld = 1; + if (val32 & OTGSC_ASV) + langwell->hsm.a_sess_vld = 1; + if (val32 & OTGSC_AVV) + langwell->hsm.a_vbus_vld = 1; + + /* defautly power the bus */ + langwell->hsm.a_bus_req = 1; + langwell->hsm.a_bus_drop = 0; + /* defautly don't request bus as B device */ + langwell->hsm.b_bus_req = 0; + /* no system error */ + langwell->hsm.a_clr_err = 0; +} + +static irqreturn_t otg_dummy_irq(int irq, void *_dev) +{ + void __iomem *reg_base = _dev; + u32 val; + u32 int_mask = 0; + + val = readl(reg_base + CI_USBMODE); + if ((val & USBMODE_CM) != USBMODE_DEVICE) + return IRQ_NONE; + + val = readl(reg_base + CI_USBSTS); + int_mask = val & INTR_DUMMY_MASK; + + if (int_mask == 0) + return IRQ_NONE; + + /* clear hsm.b_conn here since host driver can't detect it + * otg_dummy_irq called means B-disconnect happened. + */ + if (the_transceiver->hsm.b_conn) { + the_transceiver->hsm.b_conn = 0; + if (spin_trylock(&the_transceiver->wq_lock)) { + queue_work(the_transceiver->qwork, + &the_transceiver->work); + spin_unlock(&the_transceiver->wq_lock); + } + } + /* Clear interrupts */ + writel(int_mask, reg_base + CI_USBSTS); + return IRQ_HANDLED; +} + +static irqreturn_t otg_irq(int irq, void *_dev) +{ + struct langwell_otg *langwell = _dev; + u32 int_sts, int_en; + u32 int_mask = 0; + int flag = 0; + + int_sts = readl(langwell->regs + CI_OTGSC); + int_en = (int_sts & OTGSC_INTEN_MASK) >> 8; + int_mask = int_sts & int_en; + if (int_mask == 0) + return IRQ_NONE; + + if (int_mask & OTGSC_IDIS) { + otg_dbg("%s: id change int\n", __func__); + langwell->hsm.id = (int_sts & OTGSC_ID) ? 1 : 0; + flag = 1; + } + if (int_mask & OTGSC_DPIS) { + otg_dbg("%s: data pulse int\n", __func__); + langwell->hsm.a_srp_det = (int_sts & OTGSC_DPS) ? 1 : 0; + flag = 1; + } + if (int_mask & OTGSC_BSEIS) { + otg_dbg("%s: b session end int\n", __func__); + langwell->hsm.b_sess_end = (int_sts & OTGSC_BSE) ? 1 : 0; + flag = 1; + } + if (int_mask & OTGSC_BSVIS) { + otg_dbg("%s: b session valid int\n", __func__); + langwell->hsm.b_sess_vld = (int_sts & OTGSC_BSV) ? 1 : 0; + flag = 1; + } + if (int_mask & OTGSC_ASVIS) { + otg_dbg("%s: a session valid int\n", __func__); + langwell->hsm.a_sess_vld = (int_sts & OTGSC_ASV) ? 1 : 0; + flag = 1; + } + if (int_mask & OTGSC_AVVIS) { + otg_dbg("%s: a vbus valid int\n", __func__); + langwell->hsm.a_vbus_vld = (int_sts & OTGSC_AVV) ? 1 : 0; + flag = 1; + } + + if (int_mask & OTGSC_1MSS) { + /* need to schedule otg_work if any timer is expired */ + if (langwell_otg_tick_timer(&int_sts)) + flag = 1; + } + + writel((int_sts & ~OTGSC_INTSTS_MASK) | int_mask, + langwell->regs + CI_OTGSC); + if (flag) + queue_work(langwell->qwork, &langwell->work); + + return IRQ_HANDLED; +} + +static void langwell_otg_work(struct work_struct *work) +{ + struct langwell_otg *langwell = container_of(work, + struct langwell_otg, work); + int retval; + + otg_dbg("%s: old state = %s\n", __func__, + state_string(langwell->otg.state)); + + switch (langwell->otg.state) { + case OTG_STATE_UNDEFINED: + case OTG_STATE_B_IDLE: + if (!langwell->hsm.id) { + langwell_otg_del_timer(b_srp_res_tmr); + langwell->otg.default_a = 1; + langwell->hsm.a_srp_det = 0; + + langwell_otg_chrg_vbus(0); + langwell_otg_drv_vbus(0); + + set_host_mode(); + langwell->otg.state = OTG_STATE_A_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (langwell->hsm.b_srp_res_tmout) { + langwell->hsm.b_srp_res_tmout = 0; + langwell->hsm.b_bus_req = 0; + langwell_otg_nsf_msg(6); + } else if (langwell->hsm.b_sess_vld) { + langwell_otg_del_timer(b_srp_res_tmr); + langwell->hsm.b_sess_end = 0; + langwell->hsm.a_bus_suspend = 0; + + langwell_otg_chrg_vbus(0); + if (langwell->client_ops) { + langwell->client_ops->resume(langwell->pdev); + langwell->otg.state = OTG_STATE_B_PERIPHERAL; + } else + otg_dbg("client driver not loaded.\n"); + + } else if (langwell->hsm.b_bus_req && + (langwell->hsm.b_sess_end)) { + /* workaround for b_se0_srp detection */ + retval = langwell_otg_check_se0_srp(0); + if (retval) { + langwell->hsm.b_bus_req = 0; + otg_dbg("LS is not SE0, try again later\n"); + } else { + /* Start SRP */ + langwell_otg_start_srp(&langwell->otg); + langwell_otg_add_timer(b_srp_res_tmr); + } + } + break; + case OTG_STATE_B_SRP_INIT: + if (!langwell->hsm.id) { + langwell->otg.default_a = 1; + langwell->hsm.a_srp_det = 0; + + langwell_otg_drv_vbus(0); + langwell_otg_chrg_vbus(0); + + langwell->otg.state = OTG_STATE_A_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (langwell->hsm.b_sess_vld) { + langwell_otg_chrg_vbus(0); + if (langwell->client_ops) { + langwell->client_ops->resume(langwell->pdev); + langwell->otg.state = OTG_STATE_B_PERIPHERAL; + } else + otg_dbg("client driver not loaded.\n"); + } + break; + case OTG_STATE_B_PERIPHERAL: + if (!langwell->hsm.id) { + langwell->otg.default_a = 1; + langwell->hsm.a_srp_det = 0; + + langwell_otg_drv_vbus(0); + langwell_otg_chrg_vbus(0); + set_host_mode(); + + if (langwell->client_ops) { + langwell->client_ops->suspend(langwell->pdev, + PMSG_FREEZE); + } else + otg_dbg("client driver has been removed.\n"); + + langwell->otg.state = OTG_STATE_A_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (!langwell->hsm.b_sess_vld) { + langwell->hsm.b_hnp_enable = 0; + + if (langwell->client_ops) { + langwell->client_ops->suspend(langwell->pdev, + PMSG_FREEZE); + } else + otg_dbg("client driver has been removed.\n"); + + langwell->otg.state = OTG_STATE_B_IDLE; + } else if (langwell->hsm.b_bus_req && langwell->hsm.b_hnp_enable + && langwell->hsm.a_bus_suspend) { + + if (langwell->client_ops) { + langwell->client_ops->suspend(langwell->pdev, + PMSG_FREEZE); + } else + otg_dbg("client driver has been removed.\n"); + + langwell_otg_HAAR(1); + langwell->hsm.a_conn = 0; + + if (langwell->host_ops) { + langwell->host_ops->probe(langwell->pdev, + langwell->host_ops->id_table); + langwell->otg.state = OTG_STATE_B_WAIT_ACON; + } else + otg_dbg("host driver not loaded.\n"); + + langwell->hsm.a_bus_resume = 0; + langwell->hsm.b_ase0_brst_tmout = 0; + langwell_otg_add_timer(b_ase0_brst_tmr); + } + break; + + case OTG_STATE_B_WAIT_ACON: + if (!langwell->hsm.id) { + langwell_otg_del_timer(b_ase0_brst_tmr); + langwell->otg.default_a = 1; + langwell->hsm.a_srp_det = 0; + + langwell_otg_drv_vbus(0); + langwell_otg_chrg_vbus(0); + set_host_mode(); + + langwell_otg_HAAR(0); + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell->otg.state = OTG_STATE_A_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (!langwell->hsm.b_sess_vld) { + langwell_otg_del_timer(b_ase0_brst_tmr); + langwell->hsm.b_hnp_enable = 0; + langwell->hsm.b_bus_req = 0; + langwell_otg_chrg_vbus(0); + langwell_otg_HAAR(0); + + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell->otg.state = OTG_STATE_B_IDLE; + } else if (langwell->hsm.a_conn) { + langwell_otg_del_timer(b_ase0_brst_tmr); + langwell_otg_HAAR(0); + langwell->otg.state = OTG_STATE_B_HOST; + queue_work(langwell->qwork, &langwell->work); + } else if (langwell->hsm.a_bus_resume || + langwell->hsm.b_ase0_brst_tmout) { + langwell_otg_del_timer(b_ase0_brst_tmr); + langwell_otg_HAAR(0); + langwell_otg_nsf_msg(7); + + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + + langwell->hsm.a_bus_suspend = 0; + langwell->hsm.b_bus_req = 0; + + if (langwell->client_ops) + langwell->client_ops->resume(langwell->pdev); + else + otg_dbg("client driver not loaded.\n"); + + langwell->otg.state = OTG_STATE_B_PERIPHERAL; + } + break; + + case OTG_STATE_B_HOST: + if (!langwell->hsm.id) { + langwell->otg.default_a = 1; + langwell->hsm.a_srp_det = 0; + + langwell_otg_drv_vbus(0); + langwell_otg_chrg_vbus(0); + set_host_mode(); + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell->otg.state = OTG_STATE_A_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (!langwell->hsm.b_sess_vld) { + langwell->hsm.b_hnp_enable = 0; + langwell->hsm.b_bus_req = 0; + langwell_otg_chrg_vbus(0); + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell->otg.state = OTG_STATE_B_IDLE; + } else if ((!langwell->hsm.b_bus_req) || + (!langwell->hsm.a_conn)) { + langwell->hsm.b_bus_req = 0; + langwell_otg_loc_sof(0); + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + + langwell->hsm.a_bus_suspend = 0; + + if (langwell->client_ops) + langwell->client_ops->resume(langwell->pdev); + else + otg_dbg("client driver not loaded.\n"); + + langwell->otg.state = OTG_STATE_B_PERIPHERAL; + } + break; + + case OTG_STATE_A_IDLE: + langwell->otg.default_a = 1; + if (langwell->hsm.id) { + langwell->otg.default_a = 0; + langwell->hsm.b_bus_req = 0; + langwell_otg_drv_vbus(0); + langwell_otg_chrg_vbus(0); + + langwell->otg.state = OTG_STATE_B_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (langwell->hsm.a_sess_vld) { + langwell_otg_drv_vbus(1); + langwell->hsm.a_srp_det = 1; + langwell->hsm.a_wait_vrise_tmout = 0; + langwell_otg_add_timer(a_wait_vrise_tmr); + langwell->otg.state = OTG_STATE_A_WAIT_VRISE; + queue_work(langwell->qwork, &langwell->work); + } else if (!langwell->hsm.a_bus_drop && + (langwell->hsm.a_srp_det || langwell->hsm.a_bus_req)) { + langwell_otg_drv_vbus(1); + langwell->hsm.a_wait_vrise_tmout = 0; + langwell_otg_add_timer(a_wait_vrise_tmr); + langwell->otg.state = OTG_STATE_A_WAIT_VRISE; + queue_work(langwell->qwork, &langwell->work); + } + break; + case OTG_STATE_A_WAIT_VRISE: + if (langwell->hsm.id) { + langwell_otg_del_timer(a_wait_vrise_tmr); + langwell->hsm.b_bus_req = 0; + langwell->otg.default_a = 0; + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_B_IDLE; + } else if (langwell->hsm.a_vbus_vld) { + langwell_otg_del_timer(a_wait_vrise_tmr); + if (langwell->host_ops) + langwell->host_ops->probe(langwell->pdev, + langwell->host_ops->id_table); + else + otg_dbg("host driver not loaded.\n"); + langwell->hsm.b_conn = 0; + langwell->hsm.a_set_b_hnp_en = 0; + langwell->hsm.a_wait_bcon_tmout = 0; + langwell_otg_add_timer(a_wait_bcon_tmr); + langwell->otg.state = OTG_STATE_A_WAIT_BCON; + } else if (langwell->hsm.a_wait_vrise_tmout) { + if (langwell->hsm.a_vbus_vld) { + if (langwell->host_ops) + langwell->host_ops->probe( + langwell->pdev, + langwell->host_ops->id_table); + else + otg_dbg("host driver not loaded.\n"); + langwell->hsm.b_conn = 0; + langwell->hsm.a_set_b_hnp_en = 0; + langwell->hsm.a_wait_bcon_tmout = 0; + langwell_otg_add_timer(a_wait_bcon_tmr); + langwell->otg.state = OTG_STATE_A_WAIT_BCON; + } else { + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_VBUS_ERR; + } + } + break; + case OTG_STATE_A_WAIT_BCON: + if (langwell->hsm.id) { + langwell_otg_del_timer(a_wait_bcon_tmr); + + langwell->otg.default_a = 0; + langwell->hsm.b_bus_req = 0; + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_B_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (!langwell->hsm.a_vbus_vld) { + langwell_otg_del_timer(a_wait_bcon_tmr); + + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_VBUS_ERR; + } else if (langwell->hsm.a_bus_drop || + (langwell->hsm.a_wait_bcon_tmout && + !langwell->hsm.a_bus_req)) { + langwell_otg_del_timer(a_wait_bcon_tmr); + + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_WAIT_VFALL; + } else if (langwell->hsm.b_conn) { + langwell_otg_del_timer(a_wait_bcon_tmr); + + langwell->hsm.a_suspend_req = 0; + langwell->otg.state = OTG_STATE_A_HOST; + if (!langwell->hsm.a_bus_req && + langwell->hsm.a_set_b_hnp_en) { + /* It is not safe enough to do a fast + * transistion from A_WAIT_BCON to + * A_SUSPEND */ + msleep(10000); + if (langwell->hsm.a_bus_req) + break; + + if (request_irq(langwell->pdev->irq, + otg_dummy_irq, IRQF_SHARED, + driver_name, langwell->regs) != 0) { + otg_dbg("request interrupt %d fail\n", + langwell->pdev->irq); + } + + langwell_otg_HABA(1); + langwell->hsm.b_bus_resume = 0; + langwell->hsm.a_aidl_bdis_tmout = 0; + langwell_otg_add_timer(a_aidl_bdis_tmr); + + langwell_otg_loc_sof(0); + langwell->otg.state = OTG_STATE_A_SUSPEND; + } else if (!langwell->hsm.a_bus_req && + !langwell->hsm.a_set_b_hnp_en) { + struct pci_dev *pdev = langwell->pdev; + if (langwell->host_ops) + langwell->host_ops->remove(pdev); + else + otg_dbg("host driver removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_WAIT_VFALL; + } + } + break; + case OTG_STATE_A_HOST: + if (langwell->hsm.id) { + langwell->otg.default_a = 0; + langwell->hsm.b_bus_req = 0; + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_B_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (langwell->hsm.a_bus_drop || + (!langwell->hsm.a_set_b_hnp_en && !langwell->hsm.a_bus_req)) { + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_WAIT_VFALL; + } else if (!langwell->hsm.a_vbus_vld) { + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_VBUS_ERR; + } else if (langwell->hsm.a_set_b_hnp_en + && !langwell->hsm.a_bus_req) { + /* Set HABA to enable hardware assistance to signal + * A-connect after receiver B-disconnect. Hardware + * will then set client mode and enable URE, SLE and + * PCE after the assistance. otg_dummy_irq is used to + * clean these ints when client driver is not resumed. + */ + if (request_irq(langwell->pdev->irq, + otg_dummy_irq, IRQF_SHARED, driver_name, + langwell->regs) != 0) { + otg_dbg("request interrupt %d failed\n", + langwell->pdev->irq); + } + + /* set HABA */ + langwell_otg_HABA(1); + langwell->hsm.b_bus_resume = 0; + langwell->hsm.a_aidl_bdis_tmout = 0; + langwell_otg_add_timer(a_aidl_bdis_tmr); + langwell_otg_loc_sof(0); + langwell->otg.state = OTG_STATE_A_SUSPEND; + } else if (!langwell->hsm.b_conn || !langwell->hsm.a_bus_req) { + langwell->hsm.a_wait_bcon_tmout = 0; + langwell->hsm.a_set_b_hnp_en = 0; + langwell_otg_add_timer(a_wait_bcon_tmr); + langwell->otg.state = OTG_STATE_A_WAIT_BCON; + } + break; + case OTG_STATE_A_SUSPEND: + if (langwell->hsm.id) { + langwell_otg_del_timer(a_aidl_bdis_tmr); + langwell_otg_HABA(0); + free_irq(langwell->pdev->irq, langwell->regs); + langwell->otg.default_a = 0; + langwell->hsm.b_bus_req = 0; + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_B_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (langwell->hsm.a_bus_req || + langwell->hsm.b_bus_resume) { + langwell_otg_del_timer(a_aidl_bdis_tmr); + langwell_otg_HABA(0); + free_irq(langwell->pdev->irq, langwell->regs); + langwell->hsm.a_suspend_req = 0; + langwell_otg_loc_sof(1); + langwell->otg.state = OTG_STATE_A_HOST; + } else if (langwell->hsm.a_aidl_bdis_tmout || + langwell->hsm.a_bus_drop) { + langwell_otg_del_timer(a_aidl_bdis_tmr); + langwell_otg_HABA(0); + free_irq(langwell->pdev->irq, langwell->regs); + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_WAIT_VFALL; + } else if (!langwell->hsm.b_conn && + langwell->hsm.a_set_b_hnp_en) { + langwell_otg_del_timer(a_aidl_bdis_tmr); + langwell_otg_HABA(0); + free_irq(langwell->pdev->irq, langwell->regs); + + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + + langwell->hsm.b_bus_suspend = 0; + langwell->hsm.b_bus_suspend_vld = 0; + langwell->hsm.b_bus_suspend_tmout = 0; + + /* msleep(200); */ + if (langwell->client_ops) + langwell->client_ops->resume(langwell->pdev); + else + otg_dbg("client driver not loaded.\n"); + + langwell_otg_add_timer(b_bus_suspend_tmr); + langwell->otg.state = OTG_STATE_A_PERIPHERAL; + break; + } else if (!langwell->hsm.a_vbus_vld) { + langwell_otg_del_timer(a_aidl_bdis_tmr); + langwell_otg_HABA(0); + free_irq(langwell->pdev->irq, langwell->regs); + if (langwell->host_ops) + langwell->host_ops->remove(langwell->pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_VBUS_ERR; + } + break; + case OTG_STATE_A_PERIPHERAL: + if (langwell->hsm.id) { + langwell_otg_del_timer(b_bus_suspend_tmr); + langwell->otg.default_a = 0; + langwell->hsm.b_bus_req = 0; + if (langwell->client_ops) + langwell->client_ops->suspend(langwell->pdev, + PMSG_FREEZE); + else + otg_dbg("client driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_B_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (!langwell->hsm.a_vbus_vld) { + langwell_otg_del_timer(b_bus_suspend_tmr); + if (langwell->client_ops) + langwell->client_ops->suspend(langwell->pdev, + PMSG_FREEZE); + else + otg_dbg("client driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_VBUS_ERR; + } else if (langwell->hsm.a_bus_drop) { + langwell_otg_del_timer(b_bus_suspend_tmr); + if (langwell->client_ops) + langwell->client_ops->suspend(langwell->pdev, + PMSG_FREEZE); + else + otg_dbg("client driver has been removed.\n"); + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_WAIT_VFALL; + } else if (langwell->hsm.b_bus_suspend) { + langwell_otg_del_timer(b_bus_suspend_tmr); + if (langwell->client_ops) + langwell->client_ops->suspend(langwell->pdev, + PMSG_FREEZE); + else + otg_dbg("client driver has been removed.\n"); + + if (langwell->host_ops) + langwell->host_ops->probe(langwell->pdev, + langwell->host_ops->id_table); + else + otg_dbg("host driver not loaded.\n"); + langwell->hsm.a_set_b_hnp_en = 0; + langwell->hsm.a_wait_bcon_tmout = 0; + langwell_otg_add_timer(a_wait_bcon_tmr); + langwell->otg.state = OTG_STATE_A_WAIT_BCON; + } else if (langwell->hsm.b_bus_suspend_tmout) { + u32 val; + val = readl(langwell->regs + CI_PORTSC1); + if (!(val & PORTSC_SUSP)) + break; + if (langwell->client_ops) + langwell->client_ops->suspend(langwell->pdev, + PMSG_FREEZE); + else + otg_dbg("client driver has been removed.\n"); + if (langwell->host_ops) + langwell->host_ops->probe(langwell->pdev, + langwell->host_ops->id_table); + else + otg_dbg("host driver not loaded.\n"); + langwell->hsm.a_set_b_hnp_en = 0; + langwell->hsm.a_wait_bcon_tmout = 0; + langwell_otg_add_timer(a_wait_bcon_tmr); + langwell->otg.state = OTG_STATE_A_WAIT_BCON; + } + break; + case OTG_STATE_A_VBUS_ERR: + if (langwell->hsm.id) { + langwell->otg.default_a = 0; + langwell->hsm.a_clr_err = 0; + langwell->hsm.a_srp_det = 0; + langwell->otg.state = OTG_STATE_B_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (langwell->hsm.a_clr_err) { + langwell->hsm.a_clr_err = 0; + langwell->hsm.a_srp_det = 0; + reset_otg(); + init_hsm(); + if (langwell->otg.state == OTG_STATE_A_IDLE) + queue_work(langwell->qwork, &langwell->work); + } + break; + case OTG_STATE_A_WAIT_VFALL: + if (langwell->hsm.id) { + langwell->otg.default_a = 0; + langwell->otg.state = OTG_STATE_B_IDLE; + queue_work(langwell->qwork, &langwell->work); + } else if (langwell->hsm.a_bus_req) { + langwell_otg_drv_vbus(1); + langwell->hsm.a_wait_vrise_tmout = 0; + langwell_otg_add_timer(a_wait_vrise_tmr); + langwell->otg.state = OTG_STATE_A_WAIT_VRISE; + } else if (!langwell->hsm.a_sess_vld) { + langwell->hsm.a_srp_det = 0; + langwell_otg_drv_vbus(0); + set_host_mode(); + langwell->otg.state = OTG_STATE_A_IDLE; + } + break; + default: + ; + } + + otg_dbg("%s: new state = %s\n", __func__, + state_string(langwell->otg.state)); +} + + static ssize_t +show_registers(struct device *_dev, struct device_attribute *attr, char *buf) +{ + struct langwell_otg *langwell; + char *next; + unsigned size; + unsigned t; + + langwell = the_transceiver; + next = buf; + size = PAGE_SIZE; + + t = scnprintf(next, size, + "\n" + "USBCMD = 0x%08x \n" + "USBSTS = 0x%08x \n" + "USBINTR = 0x%08x \n" + "ASYNCLISTADDR = 0x%08x \n" + "PORTSC1 = 0x%08x \n" + "HOSTPC1 = 0x%08x \n" + "OTGSC = 0x%08x \n" + "USBMODE = 0x%08x \n", + readl(langwell->regs + 0x30), + readl(langwell->regs + 0x34), + readl(langwell->regs + 0x38), + readl(langwell->regs + 0x48), + readl(langwell->regs + 0x74), + readl(langwell->regs + 0xb4), + readl(langwell->regs + 0xf4), + readl(langwell->regs + 0xf8) + ); + size -= t; + next += t; + + return PAGE_SIZE - size; +} +static DEVICE_ATTR(registers, S_IRUGO, show_registers, NULL); + +static ssize_t +show_hsm(struct device *_dev, struct device_attribute *attr, char *buf) +{ + struct langwell_otg *langwell; + char *next; + unsigned size; + unsigned t; + + langwell = the_transceiver; + next = buf; + size = PAGE_SIZE; + + t = scnprintf(next, size, + "\n" + "current state = %s\n" + "a_bus_resume = \t%d\n" + "a_bus_suspend = \t%d\n" + "a_conn = \t%d\n" + "a_sess_vld = \t%d\n" + "a_srp_det = \t%d\n" + "a_vbus_vld = \t%d\n" + "b_bus_resume = \t%d\n" + "b_bus_suspend = \t%d\n" + "b_conn = \t%d\n" + "b_se0_srp = \t%d\n" + "b_sess_end = \t%d\n" + "b_sess_vld = \t%d\n" + "id = \t%d\n" + "a_set_b_hnp_en = \t%d\n" + "b_srp_done = \t%d\n" + "b_hnp_enable = \t%d\n" + "a_wait_vrise_tmout = \t%d\n" + "a_wait_bcon_tmout = \t%d\n" + "a_aidl_bdis_tmout = \t%d\n" + "b_ase0_brst_tmout = \t%d\n" + "a_bus_drop = \t%d\n" + "a_bus_req = \t%d\n" + "a_clr_err = \t%d\n" + "a_suspend_req = \t%d\n" + "b_bus_req = \t%d\n" + "b_bus_suspend_tmout = \t%d\n" + "b_bus_suspend_vld = \t%d\n", + state_string(langwell->otg.state), + langwell->hsm.a_bus_resume, + langwell->hsm.a_bus_suspend, + langwell->hsm.a_conn, + langwell->hsm.a_sess_vld, + langwell->hsm.a_srp_det, + langwell->hsm.a_vbus_vld, + langwell->hsm.b_bus_resume, + langwell->hsm.b_bus_suspend, + langwell->hsm.b_conn, + langwell->hsm.b_se0_srp, + langwell->hsm.b_sess_end, + langwell->hsm.b_sess_vld, + langwell->hsm.id, + langwell->hsm.a_set_b_hnp_en, + langwell->hsm.b_srp_done, + langwell->hsm.b_hnp_enable, + langwell->hsm.a_wait_vrise_tmout, + langwell->hsm.a_wait_bcon_tmout, + langwell->hsm.a_aidl_bdis_tmout, + langwell->hsm.b_ase0_brst_tmout, + langwell->hsm.a_bus_drop, + langwell->hsm.a_bus_req, + langwell->hsm.a_clr_err, + langwell->hsm.a_suspend_req, + langwell->hsm.b_bus_req, + langwell->hsm.b_bus_suspend_tmout, + langwell->hsm.b_bus_suspend_vld + ); + size -= t; + next += t; + + return PAGE_SIZE - size; +} +static DEVICE_ATTR(hsm, S_IRUGO, show_hsm, NULL); + +static ssize_t +get_a_bus_req(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct langwell_otg *langwell; + char *next; + unsigned size; + unsigned t; + + langwell = the_transceiver; + next = buf; + size = PAGE_SIZE; + + t = scnprintf(next, size, "%d", langwell->hsm.a_bus_req); + size -= t; + next += t; + + return PAGE_SIZE - size; +} + +static ssize_t +set_a_bus_req(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct langwell_otg *langwell; + langwell = the_transceiver; + if (!langwell->otg.default_a) + return -1; + if (count > 2) + return -1; + + if (buf[0] == '0') { + langwell->hsm.a_bus_req = 0; + otg_dbg("a_bus_req = 0\n"); + } else if (buf[0] == '1') { + /* If a_bus_drop is TRUE, a_bus_req can't be set */ + if (langwell->hsm.a_bus_drop) + return -1; + langwell->hsm.a_bus_req = 1; + otg_dbg("a_bus_req = 1\n"); + } + if (spin_trylock(&langwell->wq_lock)) { + queue_work(langwell->qwork, &langwell->work); + spin_unlock(&langwell->wq_lock); + } + return count; +} +static DEVICE_ATTR(a_bus_req, S_IRUGO | S_IWUGO, get_a_bus_req, set_a_bus_req); + +static ssize_t +get_a_bus_drop(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct langwell_otg *langwell; + char *next; + unsigned size; + unsigned t; + + langwell = the_transceiver; + next = buf; + size = PAGE_SIZE; + + t = scnprintf(next, size, "%d", langwell->hsm.a_bus_drop); + size -= t; + next += t; + + return PAGE_SIZE - size; +} + +static ssize_t +set_a_bus_drop(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct langwell_otg *langwell; + langwell = the_transceiver; + if (!langwell->otg.default_a) + return -1; + if (count > 2) + return -1; + + if (buf[0] == '0') { + langwell->hsm.a_bus_drop = 0; + otg_dbg("a_bus_drop = 0\n"); + } else if (buf[0] == '1') { + langwell->hsm.a_bus_drop = 1; + langwell->hsm.a_bus_req = 0; + otg_dbg("a_bus_drop = 1, then a_bus_req = 0\n"); + } + if (spin_trylock(&langwell->wq_lock)) { + queue_work(langwell->qwork, &langwell->work); + spin_unlock(&langwell->wq_lock); + } + return count; +} +static DEVICE_ATTR(a_bus_drop, S_IRUGO | S_IWUGO, + get_a_bus_drop, set_a_bus_drop); + +static ssize_t +get_b_bus_req(struct device *dev, struct device_attribute *attr, char *buf) +{ + struct langwell_otg *langwell; + char *next; + unsigned size; + unsigned t; + + langwell = the_transceiver; + next = buf; + size = PAGE_SIZE; + + t = scnprintf(next, size, "%d", langwell->hsm.b_bus_req); + size -= t; + next += t; + + return PAGE_SIZE - size; +} + +static ssize_t +set_b_bus_req(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct langwell_otg *langwell; + langwell = the_transceiver; + + if (langwell->otg.default_a) + return -1; + + if (count > 2) + return -1; + + if (buf[0] == '0') { + langwell->hsm.b_bus_req = 0; + otg_dbg("b_bus_req = 0\n"); + } else if (buf[0] == '1') { + langwell->hsm.b_bus_req = 1; + otg_dbg("b_bus_req = 1\n"); + } + if (spin_trylock(&langwell->wq_lock)) { + queue_work(langwell->qwork, &langwell->work); + spin_unlock(&langwell->wq_lock); + } + return count; +} +static DEVICE_ATTR(b_bus_req, S_IRUGO | S_IWUGO, get_b_bus_req, set_b_bus_req); + +static ssize_t +set_a_clr_err(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct langwell_otg *langwell; + langwell = the_transceiver; + + if (!langwell->otg.default_a) + return -1; + if (count > 2) + return -1; + + if (buf[0] == '1') { + langwell->hsm.a_clr_err = 1; + otg_dbg("a_clr_err = 1\n"); + } + if (spin_trylock(&langwell->wq_lock)) { + queue_work(langwell->qwork, &langwell->work); + spin_unlock(&langwell->wq_lock); + } + return count; +} +static DEVICE_ATTR(a_clr_err, S_IWUGO, NULL, set_a_clr_err); + +static struct attribute *inputs_attrs[] = { + &dev_attr_a_bus_req.attr, + &dev_attr_a_bus_drop.attr, + &dev_attr_b_bus_req.attr, + &dev_attr_a_clr_err.attr, + NULL, +}; + +static struct attribute_group debug_dev_attr_group = { + .name = "inputs", + .attrs = inputs_attrs, +}; + +int langwell_register_host(struct pci_driver *host_driver) +{ + int ret = 0; + + the_transceiver->host_ops = host_driver; + queue_work(the_transceiver->qwork, &the_transceiver->work); + otg_dbg("host controller driver is registered\n"); + + return ret; +} +EXPORT_SYMBOL(langwell_register_host); + +void langwell_unregister_host(struct pci_driver *host_driver) +{ + if (the_transceiver->host_ops) + the_transceiver->host_ops->remove(the_transceiver->pdev); + the_transceiver->host_ops = NULL; + the_transceiver->hsm.a_bus_drop = 1; + queue_work(the_transceiver->qwork, &the_transceiver->work); + otg_dbg("host controller driver is unregistered\n"); +} +EXPORT_SYMBOL(langwell_unregister_host); + +int langwell_register_peripheral(struct pci_driver *client_driver) +{ + int ret = 0; + + if (client_driver) + ret = client_driver->probe(the_transceiver->pdev, + client_driver->id_table); + if (!ret) { + the_transceiver->client_ops = client_driver; + queue_work(the_transceiver->qwork, &the_transceiver->work); + otg_dbg("client controller driver is registered\n"); + } + + return ret; +} +EXPORT_SYMBOL(langwell_register_peripheral); + +void langwell_unregister_peripheral(struct pci_driver *client_driver) +{ + if (the_transceiver->client_ops) + the_transceiver->client_ops->remove(the_transceiver->pdev); + the_transceiver->client_ops = NULL; + the_transceiver->hsm.b_bus_req = 0; + queue_work(the_transceiver->qwork, &the_transceiver->work); + otg_dbg("client controller driver is unregistered\n"); +} +EXPORT_SYMBOL(langwell_unregister_peripheral); + +static int langwell_otg_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + unsigned long resource, len; + void __iomem *base = NULL; + int retval; + u32 val32; + struct langwell_otg *langwell; + char qname[] = "langwell_otg_queue"; + + retval = 0; + otg_dbg("\notg controller is detected.\n"); + if (pci_enable_device(pdev) < 0) { + retval = -ENODEV; + goto done; + } + + langwell = kzalloc(sizeof *langwell, GFP_KERNEL); + if (langwell == NULL) { + retval = -ENOMEM; + goto done; + } + the_transceiver = langwell; + + /* control register: BAR 0 */ + resource = pci_resource_start(pdev, 0); + len = pci_resource_len(pdev, 0); + if (!request_mem_region(resource, len, driver_name)) { + retval = -EBUSY; + goto err; + } + langwell->region = 1; + + base = ioremap_nocache(resource, len); + if (base == NULL) { + retval = -EFAULT; + goto err; + } + langwell->regs = base; + + if (!pdev->irq) { + otg_dbg("No IRQ.\n"); + retval = -ENODEV; + goto err; + } + + langwell->qwork = create_workqueue(qname); + if (!langwell->qwork) { + otg_dbg("cannot create workqueue %s\n", qname); + retval = -ENOMEM; + goto err; + } + INIT_WORK(&langwell->work, langwell_otg_work); + + /* OTG common part */ + langwell->pdev = pdev; + langwell->otg.dev = &pdev->dev; + langwell->otg.label = driver_name; + langwell->otg.set_host = langwell_otg_set_host; + langwell->otg.set_peripheral = langwell_otg_set_peripheral; + langwell->otg.set_power = langwell_otg_set_power; + langwell->otg.start_srp = langwell_otg_start_srp; + langwell->otg.state = OTG_STATE_UNDEFINED; + if (otg_set_transceiver(&langwell->otg)) { + otg_dbg("can't set transceiver\n"); + retval = -EBUSY; + goto err; + } + + reset_otg(); + init_hsm(); + + spin_lock_init(&langwell->lock); + spin_lock_init(&langwell->wq_lock); + INIT_LIST_HEAD(&active_timers); + langwell_otg_init_timers(&langwell->hsm); + + if (request_irq(pdev->irq, otg_irq, IRQF_SHARED, + driver_name, langwell) != 0) { + otg_dbg("request interrupt %d failed\n", pdev->irq); + retval = -EBUSY; + goto err; + } + + /* enable OTGSC int */ + val32 = OTGSC_DPIE | OTGSC_BSEIE | OTGSC_BSVIE | + OTGSC_ASVIE | OTGSC_AVVIE | OTGSC_IDIE | OTGSC_IDPU; + writel(val32, langwell->regs + CI_OTGSC); + + retval = device_create_file(&pdev->dev, &dev_attr_registers); + if (retval < 0) { + otg_dbg("Can't register sysfs attribute: %d\n", retval); + goto err; + } + + retval = device_create_file(&pdev->dev, &dev_attr_hsm); + if (retval < 0) { + otg_dbg("Can't hsm sysfs attribute: %d\n", retval); + goto err; + } + + retval = sysfs_create_group(&pdev->dev.kobj, &debug_dev_attr_group); + if (retval < 0) { + otg_dbg("Can't register sysfs attr group: %d\n", retval); + goto err; + } + + if (langwell->otg.state == OTG_STATE_A_IDLE) + queue_work(langwell->qwork, &langwell->work); + + return 0; + +err: + if (the_transceiver) + langwell_otg_remove(pdev); +done: + return retval; +} + +static void langwell_otg_remove(struct pci_dev *pdev) +{ + struct langwell_otg *langwell; + + langwell = the_transceiver; + + if (langwell->qwork) { + flush_workqueue(langwell->qwork); + destroy_workqueue(langwell->qwork); + } + langwell_otg_free_timers(); + + /* disable OTGSC interrupt as OTGSC doesn't change in reset */ + writel(0, langwell->regs + CI_OTGSC); + + if (pdev->irq) + free_irq(pdev->irq, langwell); + if (langwell->regs) + iounmap(langwell->regs); + if (langwell->region) + release_mem_region(pci_resource_start(pdev, 0), + pci_resource_len(pdev, 0)); + + otg_set_transceiver(NULL); + pci_disable_device(pdev); + sysfs_remove_group(&pdev->dev.kobj, &debug_dev_attr_group); + device_remove_file(&pdev->dev, &dev_attr_hsm); + device_remove_file(&pdev->dev, &dev_attr_registers); + kfree(langwell); + langwell = NULL; +} + +static void transceiver_suspend(struct pci_dev *pdev) +{ + pci_save_state(pdev); + pci_set_power_state(pdev, PCI_D3hot); + langwell_otg_phy_low_power(1); +} + +static int langwell_otg_suspend(struct pci_dev *pdev, pm_message_t message) +{ + int ret = 0; + struct langwell_otg *langwell; + + langwell = the_transceiver; + + /* Disbale OTG interrupts */ + langwell_otg_intr(0); + + if (pdev->irq) + free_irq(pdev->irq, langwell); + + /* Prevent more otg_work */ + flush_workqueue(langwell->qwork); + spin_lock(&langwell->wq_lock); + + /* start actions */ + switch (langwell->otg.state) { + case OTG_STATE_A_IDLE: + case OTG_STATE_B_IDLE: + case OTG_STATE_A_WAIT_VFALL: + case OTG_STATE_A_VBUS_ERR: + transceiver_suspend(pdev); + break; + case OTG_STATE_A_WAIT_VRISE: + langwell_otg_del_timer(a_wait_vrise_tmr); + langwell->hsm.a_srp_det = 0; + langwell_otg_drv_vbus(0); + langwell->otg.state = OTG_STATE_A_IDLE; + transceiver_suspend(pdev); + break; + case OTG_STATE_A_WAIT_BCON: + langwell_otg_del_timer(a_wait_bcon_tmr); + if (langwell->host_ops) + ret = langwell->host_ops->suspend(pdev, message); + langwell_otg_drv_vbus(0); + break; + case OTG_STATE_A_HOST: + if (langwell->host_ops) + ret = langwell->host_ops->suspend(pdev, message); + langwell_otg_drv_vbus(0); + langwell_otg_phy_low_power(1); + break; + case OTG_STATE_A_SUSPEND: + langwell_otg_del_timer(a_aidl_bdis_tmr); + langwell_otg_HABA(0); + if (langwell->host_ops) + langwell->host_ops->remove(pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell_otg_drv_vbus(0); + transceiver_suspend(pdev); + langwell->otg.state = OTG_STATE_A_WAIT_VFALL; + break; + case OTG_STATE_A_PERIPHERAL: + if (langwell->client_ops) + ret = langwell->client_ops->suspend(pdev, message); + else + otg_dbg("client driver has been removed.\n"); + langwell_otg_drv_vbus(0); + transceiver_suspend(pdev); + langwell->otg.state = OTG_STATE_A_WAIT_VFALL; + break; + case OTG_STATE_B_HOST: + if (langwell->host_ops) + langwell->host_ops->remove(pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell->hsm.b_bus_req = 0; + transceiver_suspend(pdev); + langwell->otg.state = OTG_STATE_B_IDLE; + break; + case OTG_STATE_B_PERIPHERAL: + if (langwell->client_ops) + ret = langwell->client_ops->suspend(pdev, message); + else + otg_dbg("client driver has been removed.\n"); + break; + case OTG_STATE_B_WAIT_ACON: + langwell_otg_del_timer(b_ase0_brst_tmr); + langwell_otg_HAAR(0); + if (langwell->host_ops) + langwell->host_ops->remove(pdev); + else + otg_dbg("host driver has been removed.\n"); + langwell->hsm.b_bus_req = 0; + langwell->otg.state = OTG_STATE_B_IDLE; + transceiver_suspend(pdev); + break; + default: + otg_dbg("error state before suspend\n "); + break; + } + spin_unlock(&langwell->wq_lock); + + return ret; +} + +static void transceiver_resume(struct pci_dev *pdev) +{ + pci_restore_state(pdev); + pci_set_power_state(pdev, PCI_D0); + langwell_otg_phy_low_power(0); +} + +static int langwell_otg_resume(struct pci_dev *pdev) +{ + int ret = 0; + struct langwell_otg *langwell; + + langwell = the_transceiver; + + spin_lock(&langwell->wq_lock); + + switch (langwell->otg.state) { + case OTG_STATE_A_IDLE: + case OTG_STATE_B_IDLE: + case OTG_STATE_A_WAIT_VFALL: + case OTG_STATE_A_VBUS_ERR: + transceiver_resume(pdev); + break; + case OTG_STATE_A_WAIT_BCON: + langwell_otg_add_timer(a_wait_bcon_tmr); + langwell_otg_drv_vbus(1); + if (langwell->host_ops) + ret = langwell->host_ops->resume(pdev); + break; + case OTG_STATE_A_HOST: + langwell_otg_drv_vbus(1); + langwell_otg_phy_low_power(0); + if (langwell->host_ops) + ret = langwell->host_ops->resume(pdev); + break; + case OTG_STATE_B_PERIPHERAL: + if (langwell->client_ops) + ret = langwell->client_ops->resume(pdev); + else + otg_dbg("client driver not loaded.\n"); + break; + default: + otg_dbg("error state before suspend\n "); + break; + } + + if (request_irq(pdev->irq, otg_irq, IRQF_SHARED, + driver_name, the_transceiver) != 0) { + otg_dbg("request interrupt %d failed\n", pdev->irq); + ret = -EBUSY; + } + + /* enable OTG interrupts */ + langwell_otg_intr(1); + + spin_unlock(&langwell->wq_lock); + + queue_work(langwell->qwork, &langwell->work); + + + return ret; +} + +static int __init langwell_otg_init(void) +{ + return pci_register_driver(&otg_pci_driver); +} +module_init(langwell_otg_init); + +static void __exit langwell_otg_cleanup(void) +{ + pci_unregister_driver(&otg_pci_driver); +} +module_exit(langwell_otg_cleanup); |