--- /dev/null
+/* 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,
+};
Code Review / kvmfornfv.git / blobdiff