sfc: Don't use enums as a bitmask.

[zen-stable.git] / drivers / net / wireless / orinoco / hermes.c

/* 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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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(hermes_t *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,
};