cmd.c

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#include "cmd.h"

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/crc7.h>

#include "wl1251.h"
#include "reg.h"
#include "io.h"
#include "ps.h"
#include "acx.h"

int wl1251_cmd_send(struct wl1251 *wl, u16 id, void *buf, size_t len)
{
    struct wl1251_cmd_header *cmd;
    unsigned long timeout;
    u32 intr;
    int ret = 0;

    cmd = buf;
    cmd->id = id;
    cmd->status = 0;

    WARN_ON(len % 4 != 0);

    wl1251_mem_write(wl, wl->cmd_box_addr, buf, len);

    wl1251_reg_write32(wl, ACX_REG_INTERRUPT_TRIG, INTR_TRIG_CMD);

    timeout = jiffies + msecs_to_jiffies(WL1251_COMMAND_TIMEOUT);

    intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
    while (!(intr & WL1251_ACX_INTR_CMD_COMPLETE)) {
        if (time_after(jiffies, timeout)) {
            wl1251_error("command complete timeout");
            ret = -ETIMEDOUT;
            goto out;
        }

        msleep(1);

        intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_NO_CLEAR);
    }

    wl1251_reg_write32(wl, ACX_REG_INTERRUPT_ACK,
               WL1251_ACX_INTR_CMD_COMPLETE);

out:
    return ret;
}

int wl1251_cmd_test(struct wl1251 *wl, void *buf, size_t buf_len, u8 answer)
{
    int ret;

    wl1251_debug(DEBUG_CMD, "cmd test");

    ret = wl1251_cmd_send(wl, CMD_TEST, buf, buf_len);

    if (ret < 0) {
        wl1251_warning("TEST command failed");
        return ret;
    }

    if (answer) {
        struct wl1251_command *cmd_answer;

        /*
         * The test command got in, we can read the answer.
         * The answer would be a wl1251_command, where the
         * parameter array contains the actual answer.
         */
        wl1251_mem_read(wl, wl->cmd_box_addr, buf, buf_len);

        cmd_answer = buf;

        if (cmd_answer->header.status != CMD_STATUS_SUCCESS)
            wl1251_error("TEST command answer error: %d",
                     cmd_answer->header.status);
    }

    return 0;
}

int wl1251_cmd_interrogate(struct wl1251 *wl, u16 id, void *buf, size_t len)
{
    struct acx_header *acx = buf;
    int ret;

    wl1251_debug(DEBUG_CMD, "cmd interrogate");

    acx->id = id;

    /* payload length, does not include any headers */
    acx->len = len - sizeof(*acx);

    ret = wl1251_cmd_send(wl, CMD_INTERROGATE, acx, sizeof(*acx));
    if (ret < 0) {
        wl1251_error("INTERROGATE command failed");
        goto out;
    }

    /* the interrogate command got in, we can read the answer */
    wl1251_mem_read(wl, wl->cmd_box_addr, buf, len);

    acx = buf;
    if (acx->cmd.status != CMD_STATUS_SUCCESS)
        wl1251_error("INTERROGATE command error: %d",
                 acx->cmd.status);

out:
    return ret;
}

int wl1251_cmd_configure(struct wl1251 *wl, u16 id, void *buf, size_t len)
{
    struct acx_header *acx = buf;
    int ret;

    wl1251_debug(DEBUG_CMD, "cmd configure");

    acx->id = id;

    /* payload length, does not include any headers */
    acx->len = len - sizeof(*acx);

    ret = wl1251_cmd_send(wl, CMD_CONFIGURE, acx, len);
    if (ret < 0) {
        wl1251_warning("CONFIGURE command NOK");
        return ret;
    }

    return 0;
}

int wl1251_cmd_vbm(struct wl1251 *wl, u8 identity,
           void *bitmap, u16 bitmap_len, u8 bitmap_control)
{
    struct wl1251_cmd_vbm_update *vbm;
    int ret;

    wl1251_debug(DEBUG_CMD, "cmd vbm");

    vbm = kzalloc(sizeof(*vbm), GFP_KERNEL);
    if (!vbm) {
        ret = -ENOMEM;
        goto out;
    }

    /* Count and period will be filled by the target */
    vbm->tim.bitmap_ctrl = bitmap_control;
    if (bitmap_len > PARTIAL_VBM_MAX) {
        wl1251_warning("cmd vbm len is %d B, truncating to %d",
                   bitmap_len, PARTIAL_VBM_MAX);
        bitmap_len = PARTIAL_VBM_MAX;
    }
    memcpy(vbm->tim.pvb_field, bitmap, bitmap_len);
    vbm->tim.identity = identity;
    vbm->tim.length = bitmap_len + 3;

    vbm->len = cpu_to_le16(bitmap_len + 5);

    ret = wl1251_cmd_send(wl, CMD_VBM, vbm, sizeof(*vbm));
    if (ret < 0) {
        wl1251_error("VBM command failed");
        goto out;
    }

out:
    kfree(vbm);
    return ret;
}

int wl1251_cmd_data_path(struct wl1251 *wl, u8 channel, bool enable)
{
    struct cmd_enabledisable_path *cmd;
    int ret;
    u16 cmd_rx, cmd_tx;

    wl1251_debug(DEBUG_CMD, "cmd data path");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    cmd->channel = channel;

    if (enable) {
        cmd_rx = CMD_ENABLE_RX;
        cmd_tx = CMD_ENABLE_TX;
    } else {
        cmd_rx = CMD_DISABLE_RX;
        cmd_tx = CMD_DISABLE_TX;
    }

    ret = wl1251_cmd_send(wl, cmd_rx, cmd, sizeof(*cmd));
    if (ret < 0) {
        wl1251_error("rx %s cmd for channel %d failed",
                 enable ? "start" : "stop", channel);
        goto out;
    }

    wl1251_debug(DEBUG_BOOT, "rx %s cmd channel %d",
             enable ? "start" : "stop", channel);

    ret = wl1251_cmd_send(wl, cmd_tx, cmd, sizeof(*cmd));
    if (ret < 0) {
        wl1251_error("tx %s cmd for channel %d failed",
                 enable ? "start" : "stop", channel);
        goto out;
    }

    wl1251_debug(DEBUG_BOOT, "tx %s cmd channel %d",
             enable ? "start" : "stop", channel);

out:
    kfree(cmd);
    return ret;
}

int wl1251_cmd_join(struct wl1251 *wl, u8 bss_type, u8 channel,
            u16 beacon_interval, u8 dtim_interval)
{
    struct cmd_join *join;
    int ret, i;
    u8 *bssid;

    join = kzalloc(sizeof(*join), GFP_KERNEL);
    if (!join) {
        ret = -ENOMEM;
        goto out;
    }

    wl1251_debug(DEBUG_CMD, "cmd join%s ch %d %d/%d",
             bss_type == BSS_TYPE_IBSS ? " ibss" : "",
             channel, beacon_interval, dtim_interval);

    /* Reverse order BSSID */
    bssid = (u8 *) &join->bssid_lsb;
    for (i = 0; i < ETH_ALEN; i++)
        bssid[i] = wl->bssid[ETH_ALEN - i - 1];

    join->rx_config_options = wl->rx_config;
    join->rx_filter_options = wl->rx_filter;

    join->basic_rate_set = RATE_MASK_1MBPS | RATE_MASK_2MBPS |
        RATE_MASK_5_5MBPS | RATE_MASK_11MBPS;

    join->beacon_interval = beacon_interval;
    join->dtim_interval = dtim_interval;
    join->bss_type = bss_type;
    join->channel = channel;
    join->ctrl = JOIN_CMD_CTRL_TX_FLUSH;

    ret = wl1251_cmd_send(wl, CMD_START_JOIN, join, sizeof(*join));
    if (ret < 0) {
        wl1251_error("failed to initiate cmd join");
        goto out;
    }

out:
    kfree(join);
    return ret;
}

int wl1251_cmd_ps_mode(struct wl1251 *wl, u8 ps_mode)
{
    struct wl1251_cmd_ps_params *ps_params = NULL;
    int ret = 0;

    wl1251_debug(DEBUG_CMD, "cmd set ps mode");

    ps_params = kzalloc(sizeof(*ps_params), GFP_KERNEL);
    if (!ps_params) {
        ret = -ENOMEM;
        goto out;
    }

    ps_params->ps_mode = ps_mode;
    ps_params->send_null_data = 1;
    ps_params->retries = 5;
    ps_params->hang_over_period = 128;
    ps_params->null_data_rate = 1; /* 1 Mbps */

    ret = wl1251_cmd_send(wl, CMD_SET_PS_MODE, ps_params,
                  sizeof(*ps_params));
    if (ret < 0) {
        wl1251_error("cmd set_ps_mode failed");
        goto out;
    }

out:
    kfree(ps_params);
    return ret;
}

int wl1251_cmd_read_memory(struct wl1251 *wl, u32 addr, void *answer,
               size_t len)
{
    struct cmd_read_write_memory *cmd;
    int ret = 0;

    wl1251_debug(DEBUG_CMD, "cmd read memory");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    WARN_ON(len > MAX_READ_SIZE);
    len = min_t(size_t, len, MAX_READ_SIZE);

    cmd->addr = addr;
    cmd->size = len;

    ret = wl1251_cmd_send(wl, CMD_READ_MEMORY, cmd, sizeof(*cmd));
    if (ret < 0) {
        wl1251_error("read memory command failed: %d", ret);
        goto out;
    }

    /* the read command got in, we can now read the answer */
    wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));

    if (cmd->header.status != CMD_STATUS_SUCCESS)
        wl1251_error("error in read command result: %d",
                 cmd->header.status);

    memcpy(answer, cmd->value, len);

out:
    kfree(cmd);
    return ret;
}

int wl1251_cmd_template_set(struct wl1251 *wl, u16 cmd_id,
                void *buf, size_t buf_len)
{
    struct wl1251_cmd_packet_template *cmd;
    size_t cmd_len;
    int ret = 0;

    wl1251_debug(DEBUG_CMD, "cmd template %d", cmd_id);

    WARN_ON(buf_len > WL1251_MAX_TEMPLATE_SIZE);
    buf_len = min_t(size_t, buf_len, WL1251_MAX_TEMPLATE_SIZE);
    cmd_len = ALIGN(sizeof(*cmd) + buf_len, 4);

    cmd = kzalloc(cmd_len, GFP_KERNEL);
    if (!cmd) {
        ret = -ENOMEM;
        goto out;
    }

    cmd->size = cpu_to_le16(buf_len);

    if (buf)
        memcpy(cmd->data, buf, buf_len);

    ret = wl1251_cmd_send(wl, cmd_id, cmd, cmd_len);
    if (ret < 0) {
        wl1251_warning("cmd set_template failed: %d", ret);
        goto out;
    }

out:
    kfree(cmd);
    return ret;
}

int wl1251_cmd_scan(struct wl1251 *wl, u8 *ssid, size_t ssid_len,
            struct ieee80211_channel *channels[],
            unsigned int n_channels, unsigned int n_probes)
{
    struct wl1251_cmd_scan *cmd;
    int i, ret = 0;

    wl1251_debug(DEBUG_CMD, "cmd scan");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd)
        return -ENOMEM;

    cmd->params.rx_config_options = cpu_to_le32(CFG_RX_ALL_GOOD);
    cmd->params.rx_filter_options = cpu_to_le32(CFG_RX_PRSP_EN |
                            CFG_RX_MGMT_EN |
                            CFG_RX_BCN_EN);
    cmd->params.scan_options = 0;
    cmd->params.num_channels = n_channels;
    cmd->params.num_probe_requests = n_probes;
    cmd->params.tx_rate = cpu_to_le16(1 << 1); /* 2 Mbps */
    cmd->params.tid_trigger = 0;

    for (i = 0; i < n_channels; i++) {
        cmd->channels[i].min_duration =
            cpu_to_le32(WL1251_SCAN_MIN_DURATION);
        cmd->channels[i].max_duration =
            cpu_to_le32(WL1251_SCAN_MAX_DURATION);
        memset(&cmd->channels[i].bssid_lsb, 0xff, 4);
        memset(&cmd->channels[i].bssid_msb, 0xff, 2);
        cmd->channels[i].early_termination = 0;
        cmd->channels[i].tx_power_att = 0;
        cmd->channels[i].channel = channels[i]->hw_value;
    }

    cmd->params.ssid_len = ssid_len;
    if (ssid)
        memcpy(cmd->params.ssid, ssid, ssid_len);

    ret = wl1251_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd));
    if (ret < 0) {
        wl1251_error("cmd scan failed: %d", ret);
        goto out;
    }

    wl1251_mem_read(wl, wl->cmd_box_addr, cmd, sizeof(*cmd));

    if (cmd->header.status != CMD_STATUS_SUCCESS) {
        wl1251_error("cmd scan status wasn't success: %d",
                 cmd->header.status);
        ret = -EIO;
        goto out;
    }

out:
    kfree(cmd);
    return ret;
}

int wl1251_cmd_trigger_scan_to(struct wl1251 *wl, u32 timeout)
{
    struct wl1251_cmd_trigger_scan_to *cmd;
    int ret;

    wl1251_debug(DEBUG_CMD, "cmd trigger scan to");

    cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
    if (!cmd)
        return -ENOMEM;

    cmd->timeout = timeout;

    ret = wl1251_cmd_send(wl, CMD_TRIGGER_SCAN_TO, cmd, sizeof(*cmd));
    if (ret < 0) {
        wl1251_error("cmd trigger scan to failed: %d", ret);
        goto out;
    }

out:
    kfree(cmd);
    return ret;
}