/* SPDX-License-Identifier: GPL-2.0+ */
/* Copyright (C) 2007,2008 Freescale Semiconductor, Inc. */

#include <linux/usb/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(phy, newstate)    ((phy)->otg->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_obj(struct fsl_otg_timer);
        if (!timer)
                return NULL;
        timer->function = function;
        timer->expires = expires;
        timer->data = data;
        return timer;
}

struct fsl_otg {
        struct usb_phy phy;
        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;
};

#define FSL_OTG_NAME            "fsl-usb2-otg"

void fsl_otg_add_timer(struct otg_fsm *fsm, void *timer);
void fsl_otg_del_timer(struct otg_fsm *fsm, void *timer);
void fsl_otg_pulse_vbus(void);