/**********************************************************************
 * COPYRIGHT 2012-2018 CONNECTED DEVELOPMENT, LLC
 *
 * ALL RIGHTS RESERVED BY AND FOR THE EXCLUSIVE BENEFIT OF
 * CONNECTED DEVELOPMENT, LLC.
 *
 * CONNECTED DEVELOPMENT, LLC - CONFIDENTIAL AND PROPRIETARY
 * INFORMATION AND/OR TRADE SECRET.
 *
 * NOTICE: ALL CODE, PROGRAM, INFORMATION, SCRIPT, INSTRUCTION,
 * DATA, AND COMMENT HEREIN IS AND SHALL REMAIN THE CONFIDENTIAL
 * INFORMATION AND PROPERTY OF CONNECTED DEVELOPMENT, LLC.
 * USE AND DISCLOSURE THEREOF, EXCEPT AS STRICTLY AUTHORIZED IN A
 * WRITTEN AGREEMENT SIGNED BY CONNECTED DEVELOPMENT, LLC IS PROHIBITED.
 *
 ***********************************************************************/

static char* pulse_gpio_pin_name_by_attr_name(const char *name, int port) {
    switch (port) {
    case port_1:
        if (!strcmp(name, "reset")) {
            return "ap1-reset";
        } else if (!strcmp(name, "auto-boot")) {
            return "ap1-gpio1";
        } else {
            log_error("attirbute name [%s] is invalid for pulse in port %d",
                    name, port);
            return "";
        }

    case port_2:
        if (!strcmp(name, "reset")) {
            return "ap2-reset";
        } else if (!strcmp(name, "auto-boot")) {
            return "ap2-gpio1";
        } else {
            log_error("attirbute name [%s] is invalid for pulse in port %d",
                    name, port);
            return "";
        }
    }
}

// 1 reset
// 1 auto-boot
// 1 vendor-id
// 1 product-id
// 1 device-id
// 1 hw-version
// NULL
static size_t ap_pulse_attrs_size = 7;

static bool pulse_setup(enum ap port) {
    int i;
    int port_index = port - 1;
    int index = 0;
    int count = 0;
    int ret;
    char buf[32];
    struct kobj_attribute *attr;
    struct attribute **attrs;

    log_info("loading pulse accessory card in port %d", port);

    sprintf(buf, "ap%d", port);
    ap_subdirs[port_index] = kobject_create_and_add(buf,
            &mts_io_platform_device->dev.kobj);
    if (!ap_subdirs[port_index]) {
        log_error("kobject_create_and_add in port %d failed", port);
        return false;
    }

    // create the link to the apX directory this card is in
    // if we're in the first slot, we get plain "pulse"
    // if we're in a different slot, we might need to use "pulse-2" to differentiate
    if (port > 1) {
        for (i = 1; i < port; i++) {
            if (port_info[i - 1]) {
                if (strstr(port_info[i - 1]->product_id,
                        PRODUCT_ID_MTAC_PULSE)) {
                    count++;
                }
            }
        }
    }
    if (count > 0) {
        sprintf(buf, "pulse-%d", count + 1);
    } else {
        sprintf(buf, "pulse");
    }
    ret = sysfs_create_link(ap_subdirs[port_index]->parent,
            ap_subdirs[port_index], buf);
    if (ret) {
        log_error("failed to link [%s] to [%s], %d", buf,
                ap_subdirs[port_index]->name, ret);
    } else {
        log_info("created link [%s] to [%s], success:%d", buf,
                ap_subdirs[port_index]->name, ret);
    }

    attrs = kzalloc(sizeof(struct attribute *) * ap_pulse_attrs_size,
            GFP_KERNEL);
    if (!attrs) {
        log_error("failed to allocate attribute space for port %d", port);
        return false;
    }

    sprintf(buf, "reset");
    attr = create_attribute(buf, MTS_ATTR_MODE_RW);
    if (!attr) {
        log_error("failed to create attribute [%s] for pulse in port %d", buf,
                port);
        kfree(attrs);
        return false;
    }
    attr->show = mts_attr_show_ap_gpio_pin;
    attr->store = mts_attr_store_ap_gpio_pin;
    attrs[index++] = &attr->attr;

    sprintf(buf, "auto-boot");
    attr = create_attribute(buf, MTS_ATTR_MODE_RW);
    if (!attr) {
        log_error("failed to create attribute [%s] for pulse in port %d", buf,
                port);
        kfree(attrs);
        return false;
    }
    attr->show = mts_attr_show_ap_gpio_pin;
    attr->store = mts_attr_store_ap_gpio_pin;
    attrs[index++] = &attr->attr;

    // add attributes for eeprom contents
    if (!ap_add_product_info_attributes(port, MTAC_PULSE_1_0, attrs, &index)) {
        log_error("failed to add product info attributes for pulse in port %d",
                port);
        return false;
    }

    attrs[index] = NULL;

    ap_attr_groups[port_index].attrs = attrs;
    if (sysfs_create_group(ap_subdirs[port_index],
            &ap_attr_groups[port_index])) {
        log_error("sysfs_create_group failed for pulse in port %d", port);
        return false;
    }

    /* override ap_reset output mode to open drain */
    int res;
    if (port == 1) {
        res = gpio_request_one(AT91_PIN_PB12, GPIOF_OUT_INIT_HIGH | GPIOF_OPEN_DRAIN, "ap1-reset");
    } else {
        res = gpio_request_one(AT91_PIN_PB13, GPIOF_OUT_INIT_HIGH | GPIOF_OPEN_DRAIN, "ap2-reset");
    }
    if (res != 0)
    {
        log_error("failed to change ap%d_reset to open drain output", port);
    }

    return true;
}

static bool pulse_teardown(enum ap port) {
    int i;
    int port_index = port - 1;
    struct attribute **attrs = ap_attr_groups[port_index].attrs;

    log_info("unloading pulse accessory card in port %d", port);

    if (attrs) {
        // clean up allocated memory for attributes
        for (i = 0; i < ap_pulse_attrs_size; i++) {
            if (attrs[i]) {
                if (attrs[i]->name)
                    kfree(attrs[i]->name);

                kfree(attrs[i]);
            }
        }

        kfree(attrs);
    }
    // clean up our "apX/" kobject if it exists
    if (ap_subdirs[port_index]) {
        kobject_put(ap_subdirs[port_index]);
    }

    return true;
}

bool set_pulse_info(struct ap_info *info) {
    snprintf(info->product_id, 32, "%s", PRODUCT_ID_MTAC_PULSE);
    info->setup = &pulse_setup;
    info->teardown = &pulse_teardown;
    info->gpio_pin_name_by_attr_name = &pulse_gpio_pin_name_by_attr_name;

    return true;
}