123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777 |
- /* 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/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,
- };
|