hermes.c

Go to the documentation of this file.

/* hermes.c
 *
 * Driver core for the "Hermes" wireless MAC controller, as used in
 * the Lucent Orinoco and Cabletron RoamAbout cards. It should also
 * work on the hfa3841 and hfa3842 MAC controller chips used in the
 * Prism II chipsets.
 *
 * This is not a complete driver, just low-level access routines for
 * the MAC controller itself.
 *
 * Based on the prism2 driver from Absolute Value Systems' linux-wlan
 * project, the Linux wvlan_cs driver, Lucent's HCF-Light
 * (wvlan_hcf.c) library, and the NetBSD wireless driver (in no
 * particular order).
 *
 * Copyright (C) 2000, David Gibson, Linuxcare Australia.
 * (C) Copyright David Gibson, IBM Corp. 2001-2003.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License
 * at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and
 * limitations under the License.
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License version 2 (the "GPL"), in
 * which case the provisions of the GPL are applicable instead of the
 * above.  If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the GPL.  If you do not delete the
 * provisions above, a recipient may use your version of this file
 * under either the MPL or the GPL.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>

#include "hermes.h"

/* These are maximum timeouts. Most often, card wil react much faster */
#define CMD_BUSY_TIMEOUT (100) /* In iterations of ~1us */
#define CMD_INIT_TIMEOUT (50000) /* in iterations of ~10us */
#define CMD_COMPL_TIMEOUT (20000) /* in iterations of ~10us */
#define ALLOC_COMPL_TIMEOUT (1000) /* in iterations of ~10us */

/*
 * AUX port access.  To unlock the AUX port write the access keys to the
 * PARAM0-2 registers, then write HERMES_AUX_ENABLE to the HERMES_CONTROL
 * register.  Then read it and make sure it's HERMES_AUX_ENABLED.
 */
#define HERMES_AUX_ENABLE   0x8000  /* Enable auxiliary port access */
#define HERMES_AUX_DISABLE  0x4000  /* Disable to auxiliary port access */
#define HERMES_AUX_ENABLED  0xC000  /* Auxiliary port is open */
#define HERMES_AUX_DISABLED 0x0000  /* Auxiliary port is closed */

#define HERMES_AUX_PW0  0xFE01
#define HERMES_AUX_PW1  0xDC23
#define HERMES_AUX_PW2  0xBA45

/* HERMES_CMD_DOWNLD */
#define HERMES_PROGRAM_DISABLE             (0x0000 | HERMES_CMD_DOWNLD)
#define HERMES_PROGRAM_ENABLE_VOLATILE     (0x0100 | HERMES_CMD_DOWNLD)
#define HERMES_PROGRAM_ENABLE_NON_VOLATILE (0x0200 | HERMES_CMD_DOWNLD)
#define HERMES_PROGRAM_NON_VOLATILE        (0x0300 | HERMES_CMD_DOWNLD)

/*
 * Debugging helpers
 */

#define DMSG(stuff...) do {printk(KERN_DEBUG "hermes @ %p: " , hw->iobase); \
            printk(stuff); } while (0)

#undef HERMES_DEBUG
#ifdef HERMES_DEBUG
#include <stdarg.h>

#define DEBUG(lvl, stuff...) if ((lvl) <= HERMES_DEBUG) DMSG(stuff)

#else /* ! HERMES_DEBUG */

#define DEBUG(lvl, stuff...) do { } while (0)

#endif /* ! HERMES_DEBUG */

static const struct hermes_ops hermes_ops_local;

/*
 * Internal functions
 */

/* Issue a command to the chip. Waiting for it to complete is the caller's
   problem.

   Returns -EBUSY if the command register is busy, 0 on success.

   Callable from any context.
*/
static int hermes_issue_cmd(struct hermes *hw, u16 cmd, u16 param0,
                u16 param1, u16 param2)
{
    int k = CMD_BUSY_TIMEOUT;
    u16 reg;

    /* First wait for the command register to unbusy */
    reg = hermes_read_regn(hw, CMD);
    while ((reg & HERMES_CMD_BUSY) && k) {
        k--;
        udelay(1);
        reg = hermes_read_regn(hw, CMD);
    }
    if (reg & HERMES_CMD_BUSY)
        return -EBUSY;

    hermes_write_regn(hw, PARAM2, param2);
    hermes_write_regn(hw, PARAM1, param1);
    hermes_write_regn(hw, PARAM0, param0);
    hermes_write_regn(hw, CMD, cmd);

    return 0;
}

/*
 * Function definitions
 */

/* For doing cmds that wipe the magic constant in SWSUPPORT0 */
static int hermes_doicmd_wait(struct hermes *hw, u16 cmd,
                  u16 parm0, u16 parm1, u16 parm2,
                  struct hermes_response *resp)
{
    int err = 0;
    int k;
    u16 status, reg;

    err = hermes_issue_cmd(hw, cmd, parm0, parm1, parm2);
    if (err)
        return err;

    reg = hermes_read_regn(hw, EVSTAT);
    k = CMD_INIT_TIMEOUT;
    while ((!(reg & HERMES_EV_CMD)) && k) {
        k--;
        udelay(10);
        reg = hermes_read_regn(hw, EVSTAT);
    }

    hermes_write_regn(hw, SWSUPPORT0, HERMES_MAGIC);

    if (!hermes_present(hw)) {
        DEBUG(0, "hermes @ 0x%x: Card removed during reset.\n",
               hw->iobase);
        err = -ENODEV;
        goto out;
    }

    if (!(reg & HERMES_EV_CMD)) {
        printk(KERN_ERR "hermes @ %p: "
               "Timeout waiting for card to reset (reg=0x%04x)!\n",
               hw->iobase, reg);
        err = -ETIMEDOUT;
        goto out;
    }

    status = hermes_read_regn(hw, STATUS);
    if (resp) {
        resp->status = status;
        resp->resp0 = hermes_read_regn(hw, RESP0);
        resp->resp1 = hermes_read_regn(hw, RESP1);
        resp->resp2 = hermes_read_regn(hw, RESP2);
    }

    hermes_write_regn(hw, EVACK, HERMES_EV_CMD);

    if (status & HERMES_STATUS_RESULT)
        err = -EIO;
out:
    return err;
}

void hermes_struct_init(struct hermes *hw, void __iomem *address,
            int reg_spacing)
{
    hw->iobase = address;
    hw->reg_spacing = reg_spacing;
    hw->inten = 0x0;
    hw->eeprom_pda = false;
    hw->ops = &hermes_ops_local;
}
EXPORT_SYMBOL(hermes_struct_init);

static int hermes_init(struct hermes *hw)
{
    u16 reg;
    int err = 0;
    int k;

    /* We don't want to be interrupted while resetting the chipset */
    hw->inten = 0x0;
    hermes_write_regn(hw, INTEN, 0);
    hermes_write_regn(hw, EVACK, 0xffff);

    /* Normally it's a "can't happen" for the command register to
       be busy when we go to issue a command because we are
       serializing all commands.  However we want to have some
       chance of resetting the card even if it gets into a stupid
       state, so we actually wait to see if the command register
       will unbusy itself here. */
    k = CMD_BUSY_TIMEOUT;
    reg = hermes_read_regn(hw, CMD);
    while (k && (reg & HERMES_CMD_BUSY)) {
        if (reg == 0xffff) /* Special case - the card has probably been
                      removed, so don't wait for the timeout */
            return -ENODEV;

        k--;
        udelay(1);
        reg = hermes_read_regn(hw, CMD);
    }

    /* No need to explicitly handle the timeout - if we've timed
       out hermes_issue_cmd() will probably return -EBUSY below */

    /* According to the documentation, EVSTAT may contain
       obsolete event occurrence information.  We have to acknowledge
       it by writing EVACK. */
    reg = hermes_read_regn(hw, EVSTAT);
    hermes_write_regn(hw, EVACK, reg);

    /* We don't use hermes_docmd_wait here, because the reset wipes
       the magic constant in SWSUPPORT0 away, and it gets confused */
    err = hermes_doicmd_wait(hw, HERMES_CMD_INIT, 0, 0, 0, NULL);

    return err;
}

/* Issue a command to the chip, and (busy!) wait for it to
 * complete.
 *
 * Returns:
 *     < 0 on internal error
 *       0 on success
 *     > 0 on error returned by the firmware
 *
 * Callable from any context, but locking is your problem. */
static int hermes_docmd_wait(struct hermes *hw, u16 cmd, u16 parm0,
                 struct hermes_response *resp)
{
    int err;
    int k;
    u16 reg;
    u16 status;

    err = hermes_issue_cmd(hw, cmd, parm0, 0, 0);
    if (err) {
        if (!hermes_present(hw)) {
            if (net_ratelimit())
                printk(KERN_WARNING "hermes @ %p: "
                       "Card removed while issuing command "
                       "0x%04x.\n", hw->iobase, cmd);
            err = -ENODEV;
        } else
            if (net_ratelimit())
                printk(KERN_ERR "hermes @ %p: "
                       "Error %d issuing command 0x%04x.\n",
                       hw->iobase, err, cmd);
        goto out;
    }

    reg = hermes_read_regn(hw, EVSTAT);
    k = CMD_COMPL_TIMEOUT;
    while ((!(reg & HERMES_EV_CMD)) && k) {
        k--;
        udelay(10);
        reg = hermes_read_regn(hw, EVSTAT);
    }

    if (!hermes_present(hw)) {
        printk(KERN_WARNING "hermes @ %p: Card removed "
               "while waiting for command 0x%04x completion.\n",
               hw->iobase, cmd);
        err = -ENODEV;
        goto out;
    }

    if (!(reg & HERMES_EV_CMD)) {
        printk(KERN_ERR "hermes @ %p: Timeout waiting for "
               "command 0x%04x completion.\n", hw->iobase, cmd);
        err = -ETIMEDOUT;
        goto out;
    }

    status = hermes_read_regn(hw, STATUS);
    if (resp) {
        resp->status = status;
        resp->resp0 = hermes_read_regn(hw, RESP0);
        resp->resp1 = hermes_read_regn(hw, RESP1);
        resp->resp2 = hermes_read_regn(hw, RESP2);
    }

    hermes_write_regn(hw, EVACK, HERMES_EV_CMD);

    if (status & HERMES_STATUS_RESULT)
        err = -EIO;

 out:
    return err;
}

static int hermes_allocate(struct hermes *hw, u16 size, u16 *fid)
{
    int err = 0;
    int k;
    u16 reg;

    if ((size < HERMES_ALLOC_LEN_MIN) || (size > HERMES_ALLOC_LEN_MAX))
        return -EINVAL;

    err = hermes_docmd_wait(hw, HERMES_CMD_ALLOC, size, NULL);
    if (err)
        return err;

    reg = hermes_read_regn(hw, EVSTAT);
    k = ALLOC_COMPL_TIMEOUT;
    while ((!(reg & HERMES_EV_ALLOC)) && k) {
        k--;
        udelay(10);
        reg = hermes_read_regn(hw, EVSTAT);
    }

    if (!hermes_present(hw)) {
        printk(KERN_WARNING "hermes @ %p: "
               "Card removed waiting for frame allocation.\n",
               hw->iobase);
        return -ENODEV;
    }

    if (!(reg & HERMES_EV_ALLOC)) {
        printk(KERN_ERR "hermes @ %p: "
               "Timeout waiting for frame allocation\n",
               hw->iobase);
        return -ETIMEDOUT;
    }

    *fid = hermes_read_regn(hw, ALLOCFID);
    hermes_write_regn(hw, EVACK, HERMES_EV_ALLOC);

    return 0;
}

/* Set up a BAP to read a particular chunk of data from card's internal buffer.
 *
 * Returns:
 *     < 0 on internal failure (errno)
 *       0 on success
 *     > 0 on error
 * from firmware
 *
 * Callable from any context */
static int hermes_bap_seek(struct hermes *hw, int bap, u16 id, u16 offset)
{
    int sreg = bap ? HERMES_SELECT1 : HERMES_SELECT0;
    int oreg = bap ? HERMES_OFFSET1 : HERMES_OFFSET0;
    int k;
    u16 reg;

    /* Paranoia.. */
    if ((offset > HERMES_BAP_OFFSET_MAX) || (offset % 2))
        return -EINVAL;

    k = HERMES_BAP_BUSY_TIMEOUT;
    reg = hermes_read_reg(hw, oreg);
    while ((reg & HERMES_OFFSET_BUSY) && k) {
        k--;
        udelay(1);
        reg = hermes_read_reg(hw, oreg);
    }

    if (reg & HERMES_OFFSET_BUSY)
        return -ETIMEDOUT;

    /* Now we actually set up the transfer */
    hermes_write_reg(hw, sreg, id);
    hermes_write_reg(hw, oreg, offset);

    /* Wait for the BAP to be ready */
    k = HERMES_BAP_BUSY_TIMEOUT;
    reg = hermes_read_reg(hw, oreg);
    while ((reg & (HERMES_OFFSET_BUSY | HERMES_OFFSET_ERR)) && k) {
        k--;
        udelay(1);
        reg = hermes_read_reg(hw, oreg);
    }

    if (reg != offset) {
        printk(KERN_ERR "hermes @ %p: BAP%d offset %s: "
               "reg=0x%x id=0x%x offset=0x%x\n", hw->iobase, bap,
               (reg & HERMES_OFFSET_BUSY) ? "timeout" : "error",
               reg, id, offset);

        if (reg & HERMES_OFFSET_BUSY)
            return -ETIMEDOUT;

        return -EIO;        /* error or wrong offset */
    }

    return 0;
}

/* Read a block of data from the chip's buffer, via the
 * BAP. Synchronization/serialization is the caller's problem.  len
 * must be even.
 *
 * Returns:
 *     < 0 on internal failure (errno)
 *       0 on success
 *     > 0 on error from firmware
 */
static int hermes_bap_pread(struct hermes *hw, int bap, void *buf, int len,
                u16 id, u16 offset)
{
    int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
    int err = 0;

    if ((len < 0) || (len % 2))
        return -EINVAL;

    err = hermes_bap_seek(hw, bap, id, offset);
    if (err)
        goto out;

    /* Actually do the transfer */
    hermes_read_words(hw, dreg, buf, len / 2);

 out:
    return err;
}

/* Write a block of data to the chip's buffer, via the
 * BAP. Synchronization/serialization is the caller's problem.
 *
 * Returns:
 *     < 0 on internal failure (errno)
 *       0 on success
 *     > 0 on error from firmware
 */
static int hermes_bap_pwrite(struct hermes *hw, int bap, const void *buf,
                 int len, u16 id, u16 offset)
{
    int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
    int err = 0;

    if (len < 0)
        return -EINVAL;

    err = hermes_bap_seek(hw, bap, id, offset);
    if (err)
        goto out;

    /* Actually do the transfer */
    hermes_write_bytes(hw, dreg, buf, len);

 out:
    return err;
}

/* Read a Length-Type-Value record from the card.
 *
 * If length is NULL, we ignore the length read from the card, and
 * read the entire buffer regardless. This is useful because some of
 * the configuration records appear to have incorrect lengths in
 * practice.
 *
 * Callable from user or bh context.  */
static int hermes_read_ltv(struct hermes *hw, int bap, u16 rid,
               unsigned bufsize, u16 *length, void *buf)
{
    int err = 0;
    int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
    u16 rlength, rtype;
    unsigned nwords;

    if (bufsize % 2)
        return -EINVAL;

    err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS, rid, NULL);
    if (err)
        return err;

    err = hermes_bap_seek(hw, bap, rid, 0);
    if (err)
        return err;

    rlength = hermes_read_reg(hw, dreg);

    if (!rlength)
        return -ENODATA;

    rtype = hermes_read_reg(hw, dreg);

    if (length)
        *length = rlength;

    if (rtype != rid)
        printk(KERN_WARNING "hermes @ %p: %s(): "
               "rid (0x%04x) does not match type (0x%04x)\n",
               hw->iobase, __func__, rid, rtype);
    if (HERMES_RECLEN_TO_BYTES(rlength) > bufsize)
        printk(KERN_WARNING "hermes @ %p: "
               "Truncating LTV record from %d to %d bytes. "
               "(rid=0x%04x, len=0x%04x)\n", hw->iobase,
               HERMES_RECLEN_TO_BYTES(rlength), bufsize, rid, rlength);

    nwords = min((unsigned)rlength - 1, bufsize / 2);
    hermes_read_words(hw, dreg, buf, nwords);

    return 0;
}

static int hermes_write_ltv(struct hermes *hw, int bap, u16 rid,
                u16 length, const void *value)
{
    int dreg = bap ? HERMES_DATA1 : HERMES_DATA0;
    int err = 0;
    unsigned count;

    if (length == 0)
        return -EINVAL;

    err = hermes_bap_seek(hw, bap, rid, 0);
    if (err)
        return err;

    hermes_write_reg(hw, dreg, length);
    hermes_write_reg(hw, dreg, rid);

    count = length - 1;

    hermes_write_bytes(hw, dreg, value, count << 1);

    err = hermes_docmd_wait(hw, HERMES_CMD_ACCESS | HERMES_CMD_WRITE,
                rid, NULL);

    return err;
}

/*** Hermes AUX control ***/

static inline void
hermes_aux_setaddr(struct hermes *hw, u32 addr)
{
    hermes_write_reg(hw, HERMES_AUXPAGE, (u16) (addr >> 7));
    hermes_write_reg(hw, HERMES_AUXOFFSET, (u16) (addr & 0x7F));
}

static inline int
hermes_aux_control(struct hermes *hw, int enabled)
{
    int desired_state = enabled ? HERMES_AUX_ENABLED : HERMES_AUX_DISABLED;
    int action = enabled ? HERMES_AUX_ENABLE : HERMES_AUX_DISABLE;
    int i;

    /* Already open? */
    if (hermes_read_reg(hw, HERMES_CONTROL) == desired_state)
        return 0;

    hermes_write_reg(hw, HERMES_PARAM0, HERMES_AUX_PW0);
    hermes_write_reg(hw, HERMES_PARAM1, HERMES_AUX_PW1);
    hermes_write_reg(hw, HERMES_PARAM2, HERMES_AUX_PW2);
    hermes_write_reg(hw, HERMES_CONTROL, action);

    for (i = 0; i < 20; i++) {
        udelay(10);
        if (hermes_read_reg(hw, HERMES_CONTROL) ==
            desired_state)
            return 0;
    }

    return -EBUSY;
}

/*** Hermes programming ***/

/* About to start programming data (Hermes I)
 * offset is the entry point
 *
 * Spectrum_cs' Symbol fw does not require this
 * wl_lkm Agere fw does
 * Don't know about intersil
 */
static int hermesi_program_init(struct hermes *hw, u32 offset)
{
    int err;

    /* Disable interrupts?*/
    /*hw->inten = 0x0;*/
    /*hermes_write_regn(hw, INTEN, 0);*/
    /*hermes_set_irqmask(hw, 0);*/

    /* Acknowledge any outstanding command */
    hermes_write_regn(hw, EVACK, 0xFFFF);

    /* Using init_cmd_wait rather than cmd_wait */
    err = hw->ops->init_cmd_wait(hw,
                     0x0100 | HERMES_CMD_INIT,
                     0, 0, 0, NULL);
    if (err)
        return err;

    err = hw->ops->init_cmd_wait(hw,
                     0x0000 | HERMES_CMD_INIT,
                     0, 0, 0, NULL);
    if (err)
        return err;

    err = hermes_aux_control(hw, 1);
    pr_debug("AUX enable returned %d\n", err);

    if (err)
        return err;

    pr_debug("Enabling volatile, EP 0x%08x\n", offset);
    err = hw->ops->init_cmd_wait(hw,
                     HERMES_PROGRAM_ENABLE_VOLATILE,
                     offset & 0xFFFFu,
                     offset >> 16,
                     0,
                     NULL);
    pr_debug("PROGRAM_ENABLE returned %d\n", err);

    return err;
}

/* Done programming data (Hermes I)
 *
 * Spectrum_cs' Symbol fw does not require this
 * wl_lkm Agere fw does
 * Don't know about intersil
 */
static int hermesi_program_end(struct hermes *hw)
{
    struct hermes_response resp;
    int rc = 0;
    int err;

    rc = hw->ops->cmd_wait(hw, HERMES_PROGRAM_DISABLE, 0, &resp);

    pr_debug("PROGRAM_DISABLE returned %d, "
         "r0 0x%04x, r1 0x%04x, r2 0x%04x\n",
         rc, resp.resp0, resp.resp1, resp.resp2);

    if ((rc == 0) &&
        ((resp.status & HERMES_STATUS_CMDCODE) != HERMES_CMD_DOWNLD))
        rc = -EIO;

    err = hermes_aux_control(hw, 0);
    pr_debug("AUX disable returned %d\n", err);

    /* Acknowledge any outstanding command */
    hermes_write_regn(hw, EVACK, 0xFFFF);

    /* Reinitialise, ignoring return */
    (void) hw->ops->init_cmd_wait(hw, 0x0000 | HERMES_CMD_INIT,
                      0, 0, 0, NULL);

    return rc ? rc : err;
}

static int hermes_program_bytes(struct hermes *hw, const char *data,
                u32 addr, u32 len)
{
    /* wl lkm splits the programming into chunks of 2000 bytes.
     * This restriction appears to come from USB. The PCMCIA
     * adapters can program the whole lot in one go */
    hermes_aux_setaddr(hw, addr);
    hermes_write_bytes(hw, HERMES_AUXDATA, data, len);
    return 0;
}

/* Read PDA from the adapter */
static int hermes_read_pda(struct hermes *hw, __le16 *pda, u32 pda_addr,
               u16 pda_len)
{
    int ret;
    u16 pda_size;
    u16 data_len = pda_len;
    __le16 *data = pda;

    if (hw->eeprom_pda) {
        /* PDA of spectrum symbol is in eeprom */

        /* Issue command to read EEPROM */
        ret = hw->ops->cmd_wait(hw, HERMES_CMD_READMIF, 0, NULL);
        if (ret)
            return ret;
    } else {
        /* wl_lkm does not include PDA size in the PDA area.
         * We will pad the information into pda, so other routines
         * don't have to be modified */
        pda[0] = cpu_to_le16(pda_len - 2);
            /* Includes CFG_PROD_DATA but not itself */
        pda[1] = cpu_to_le16(0x0800); /* CFG_PROD_DATA */
        data_len = pda_len - 4;
        data = pda + 2;
    }

    /* Open auxiliary port */
    ret = hermes_aux_control(hw, 1);
    pr_debug("AUX enable returned %d\n", ret);
    if (ret)
        return ret;

    /* Read PDA */
    hermes_aux_setaddr(hw, pda_addr);
    hermes_read_words(hw, HERMES_AUXDATA, data, data_len / 2);

    /* Close aux port */
    ret = hermes_aux_control(hw, 0);
    pr_debug("AUX disable returned %d\n", ret);

    /* Check PDA length */
    pda_size = le16_to_cpu(pda[0]);
    pr_debug("Actual PDA length %d, Max allowed %d\n",
         pda_size, pda_len);
    if (pda_size > pda_len)
        return -EINVAL;

    return 0;
}

static void hermes_lock_irqsave(spinlock_t *lock,
                unsigned long *flags) __acquires(lock)
{
    spin_lock_irqsave(lock, *flags);
}

static void hermes_unlock_irqrestore(spinlock_t *lock,
                     unsigned long *flags) __releases(lock)
{
    spin_unlock_irqrestore(lock, *flags);
}

static void hermes_lock_irq(spinlock_t *lock) __acquires(lock)
{
    spin_lock_irq(lock);
}

static void hermes_unlock_irq(spinlock_t *lock) __releases(lock)
{
    spin_unlock_irq(lock);
}

/* Hermes operations for local buses */
static const struct hermes_ops hermes_ops_local = {
    .init = hermes_init,
    .cmd_wait = hermes_docmd_wait,
    .init_cmd_wait = hermes_doicmd_wait,
    .allocate = hermes_allocate,
    .read_ltv = hermes_read_ltv,
    .write_ltv = hermes_write_ltv,
    .bap_pread = hermes_bap_pread,
    .bap_pwrite = hermes_bap_pwrite,
    .read_pda = hermes_read_pda,
    .program_init = hermesi_program_init,
    .program_end = hermesi_program_end,
    .program = hermes_program_bytes,
    .lock_irqsave = hermes_lock_irqsave,
    .unlock_irqrestore = hermes_unlock_irqrestore,
    .lock_irq = hermes_lock_irq,
    .unlock_irq = hermes_unlock_irq,
};