Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath6kl/bmi.c | 692 +++++++++++++++++++++++++++++++++
1 files changed, 692 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/wireless/ath/ath6kl/bmi.c
diff --git a/drivers/net/wireless/ath/ath6kl/bmi.c b/drivers/net/wireless/ath/ath6kl/bmi.c
new file mode 100644
index 0000000..1aed4f1
--- /dev/null
+++ b/drivers/net/wireless/ath/ath6kl/bmi.c
@@ -0,0 +1,692 @@
+/*
+ * Copyright (c) 2004-2011 Atheros Communications Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "core.h"
+#include "hif-ops.h"
+#include "target.h"
+#include "debug.h"
+
+static int ath6kl_get_bmi_cmd_credits(struct ath6kl *ar)
+{
+ u32 addr;
+ unsigned long timeout;
+ int ret;
+
+ ar->bmi.cmd_credits = 0;
+
+ /* Read the counter register to get the command credits */
+ addr = COUNT_DEC_ADDRESS + (HTC_MAILBOX_NUM_MAX + ENDPOINT1) * 4;
+
+ timeout = jiffies + msecs_to_jiffies(BMI_COMMUNICATION_TIMEOUT);
+ while (time_before(jiffies, timeout) && !ar->bmi.cmd_credits) {
+
+ /*
+ * Hit the credit counter with a 4-byte access, the first byte
+ * read will hit the counter and cause a decrement, while the
+ * remaining 3 bytes has no effect. The rationale behind this
+ * is to make all HIF accesses 4-byte aligned.
+ */
+ ret = hif_read_write_sync(ar, addr,
+ (u8 *)&ar->bmi.cmd_credits, 4,
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret) {
+ ath6kl_err("Unable to decrement the command credit count register: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* The counter is only 8 bits.
+ * Ignore anything in the upper 3 bytes
+ */
+ ar->bmi.cmd_credits &= 0xFF;
+ }
+
+ if (!ar->bmi.cmd_credits) {
+ ath6kl_err("%s bmi communication timeout\n", __func__);
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int ath6kl_bmi_get_rx_lkahd(struct ath6kl *ar, bool need_timeout)
+{
+ unsigned long timeout;
+ u32 rx_word = 0;
+ int ret = 0;
+
+ timeout = jiffies + msecs_to_jiffies(BMI_COMMUNICATION_TIMEOUT);
+ while ((!need_timeout || time_before(jiffies, timeout)) && !rx_word) {
+ ret = hif_read_write_sync(ar, RX_LOOKAHEAD_VALID_ADDRESS,
+ (u8 *)&rx_word, sizeof(rx_word),
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret) {
+ ath6kl_err("unable to read RX_LOOKAHEAD_VALID\n");
+ return ret;
+ }
+
+ /* all we really want is one bit */
+ rx_word &= (1 << ENDPOINT1);
+ }
+
+ if (!rx_word) {
+ ath6kl_err("bmi_recv_buf FIFO empty\n");
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int ath6kl_bmi_send_buf(struct ath6kl *ar, u8 *buf, u32 len)
+{
+ int ret;
+ u32 addr;
+
+ ret = ath6kl_get_bmi_cmd_credits(ar);
+ if (ret)
+ return ret;
+
+ addr = ar->mbox_info.htc_addr;
+
+ ret = hif_read_write_sync(ar, addr, buf, len,
+ HIF_WR_SYNC_BYTE_INC);
+ if (ret)
+ ath6kl_err("unable to send the bmi data to the device\n");
+
+ return ret;
+}
+
+static int ath6kl_bmi_recv_buf(struct ath6kl *ar,
+ u8 *buf, u32 len, bool want_timeout)
+{
+ int ret;
+ u32 addr;
+
+ /*
+ * During normal bootup, small reads may be required.
+ * Rather than issue an HIF Read and then wait as the Target
+ * adds successive bytes to the FIFO, we wait here until
+ * we know that response data is available.
+ *
+ * This allows us to cleanly timeout on an unexpected
+ * Target failure rather than risk problems at the HIF level.
+ * In particular, this avoids SDIO timeouts and possibly garbage
+ * data on some host controllers. And on an interconnect
+ * such as Compact Flash (as well as some SDIO masters) which
+ * does not provide any indication on data timeout, it avoids
+ * a potential hang or garbage response.
+ *
+ * Synchronization is more difficult for reads larger than the
+ * size of the MBOX FIFO (128B), because the Target is unable
+ * to push the 129th byte of data until AFTER the Host posts an
+ * HIF Read and removes some FIFO data. So for large reads the
+ * Host proceeds to post an HIF Read BEFORE all the data is
+ * actually available to read. Fortunately, large BMI reads do
+ * not occur in practice -- they're supported for debug/development.
+ *
+ * So Host/Target BMI synchronization is divided into these cases:
+ * CASE 1: length < 4
+ * Should not happen
+ *
+ * CASE 2: 4 <= length <= 128
+ * Wait for first 4 bytes to be in FIFO
+ * If CONSERVATIVE_BMI_READ is enabled, also wait for
+ * a BMI command credit, which indicates that the ENTIRE
+ * response is available in the the FIFO
+ *
+ * CASE 3: length > 128
+ * Wait for the first 4 bytes to be in FIFO
+ *
+ * For most uses, a small timeout should be sufficient and we will
+ * usually see a response quickly; but there may be some unusual
+ * (debug) cases of BMI_EXECUTE where we want an larger timeout.
+ * For now, we use an unbounded busy loop while waiting for
+ * BMI_EXECUTE.
+ *
+ * If BMI_EXECUTE ever needs to support longer-latency execution,
+ * especially in production, this code needs to be enhanced to sleep
+ * and yield. Also note that BMI_COMMUNICATION_TIMEOUT is currently
+ * a function of Host processor speed.
+ */
+ if (len >= 4) { /* NB: Currently, always true */
+ ret = ath6kl_bmi_get_rx_lkahd(ar, want_timeout);
+ if (ret)
+ return ret;
+ }
+
+ addr = ar->mbox_info.htc_addr;
+ ret = hif_read_write_sync(ar, addr, buf, len,
+ HIF_RD_SYNC_BYTE_INC);
+ if (ret) {
+ ath6kl_err("Unable to read the bmi data from the device: %d\n",
+ ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+int ath6kl_bmi_done(struct ath6kl *ar)
+{
+ int ret;
+ u32 cid = BMI_DONE;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_dbg(ATH6KL_DBG_BMI, "bmi done skipped\n");
+ return 0;
+ }
+
+ ar->bmi.done_sent = true;
+
+ ret = ath6kl_bmi_send_buf(ar, (u8 *)&cid, sizeof(cid));
+ if (ret) {
+ ath6kl_err("Unable to send bmi done: %d\n", ret);
+ return ret;
+ }
+
+ ath6kl_bmi_cleanup(ar);
+
+ return 0;
+}
+
+int ath6kl_bmi_get_target_info(struct ath6kl *ar,
+ struct ath6kl_bmi_target_info *targ_info)
+{
+ int ret;
+ u32 cid = BMI_GET_TARGET_INFO;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_err("bmi done sent already, cmd %d disallowed\n", cid);
+ return -EACCES;
+ }
+
+ ret = ath6kl_bmi_send_buf(ar, (u8 *)&cid, sizeof(cid));
+ if (ret) {
+ ath6kl_err("Unable to send get target info: %d\n", ret);
+ return ret;
+ }
+
+ ret = ath6kl_bmi_recv_buf(ar, (u8 *)&targ_info->version,
+ sizeof(targ_info->version), true);
+ if (ret) {
+ ath6kl_err("Unable to recv target info: %d\n", ret);
+ return ret;
+ }
+
+ if (le32_to_cpu(targ_info->version) == TARGET_VERSION_SENTINAL) {
+ /* Determine how many bytes are in the Target's targ_info */
+ ret = ath6kl_bmi_recv_buf(ar,
+ (u8 *)&targ_info->byte_count,
+ sizeof(targ_info->byte_count),
+ true);
+ if (ret) {
+ ath6kl_err("unable to read target info byte count: %d\n",
+ ret);
+ return ret;
+ }
+
+ /*
+ * The target's targ_info doesn't match the host's targ_info.
+ * We need to do some backwards compatibility to make this work.
+ */
+ if (le32_to_cpu(targ_info->byte_count) != sizeof(*targ_info)) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ /* Read the remainder of the targ_info */
+ ret = ath6kl_bmi_recv_buf(ar,
+ ((u8 *)targ_info) +
+ sizeof(targ_info->byte_count),
+ sizeof(*targ_info) -
+ sizeof(targ_info->byte_count),
+ true);
+
+ if (ret) {
+ ath6kl_err("Unable to read target info (%d bytes): %d\n",
+ targ_info->byte_count, ret);
+ return ret;
+ }
+ }
+
+ ath6kl_dbg(ATH6KL_DBG_BMI, "target info (ver: 0x%x type: 0x%x)\n",
+ targ_info->version, targ_info->type);
+
+ return 0;
+}
+
+int ath6kl_bmi_read(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
+{
+ u32 cid = BMI_READ_MEMORY;
+ int ret;
+ u32 offset;
+ u32 len_remain, rx_len;
+ u16 size;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_err("bmi done sent already, cmd %d disallowed\n", cid);
+ return -EACCES;
+ }
+
+ size = BMI_DATASZ_MAX + sizeof(cid) + sizeof(addr) + sizeof(len);
+ if (size > MAX_BMI_CMDBUF_SZ) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ memset(ar->bmi.cmd_buf, 0, size);
+
+ ath6kl_dbg(ATH6KL_DBG_BMI,
+ "bmi read memory: device: addr: 0x%x, len: %d\n",
+ addr, len);
+
+ len_remain = len;
+
+ while (len_remain) {
+ rx_len = (len_remain < BMI_DATASZ_MAX) ?
+ len_remain : BMI_DATASZ_MAX;
+ offset = 0;
+ memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
+ offset += sizeof(cid);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
+ offset += sizeof(addr);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &rx_len, sizeof(rx_len));
+ offset += sizeof(len);
+
+ ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ if (ret) {
+ ath6kl_err("Unable to write to the device: %d\n",
+ ret);
+ return ret;
+ }
+ ret = ath6kl_bmi_recv_buf(ar, ar->bmi.cmd_buf, rx_len, true);
+ if (ret) {
+ ath6kl_err("Unable to read from the device: %d\n",
+ ret);
+ return ret;
+ }
+ memcpy(&buf[len - len_remain], ar->bmi.cmd_buf, rx_len);
+ len_remain -= rx_len; addr += rx_len;
+ }
+
+ return 0;
+}
+
+int ath6kl_bmi_write(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
+{
+ u32 cid = BMI_WRITE_MEMORY;
+ int ret;
+ u32 offset;
+ u32 len_remain, tx_len;
+ const u32 header = sizeof(cid) + sizeof(addr) + sizeof(len);
+ u8 aligned_buf[BMI_DATASZ_MAX];
+ u8 *src;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_err("bmi done sent already, cmd %d disallowed\n", cid);
+ return -EACCES;
+ }
+
+ if ((BMI_DATASZ_MAX + header) > MAX_BMI_CMDBUF_SZ) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+
+ memset(ar->bmi.cmd_buf, 0, BMI_DATASZ_MAX + header);
+
+ ath6kl_dbg(ATH6KL_DBG_BMI,
+ "bmi write memory: addr: 0x%x, len: %d\n", addr, len);
+
+ len_remain = len;
+ while (len_remain) {
+ src = &buf[len - len_remain];
+
+ if (len_remain < (BMI_DATASZ_MAX - header)) {
+ if (len_remain & 3) {
+ /* align it with 4 bytes */
+ len_remain = len_remain +
+ (4 - (len_remain & 3));
+ memcpy(aligned_buf, src, len_remain);
+ src = aligned_buf;
+ }
+ tx_len = len_remain;
+ } else {
+ tx_len = (BMI_DATASZ_MAX - header);
+ }
+
+ offset = 0;
+ memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
+ offset += sizeof(cid);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
+ offset += sizeof(addr);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &tx_len, sizeof(tx_len));
+ offset += sizeof(tx_len);
+ memcpy(&(ar->bmi.cmd_buf[offset]), src, tx_len);
+ offset += tx_len;
+
+ ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ if (ret) {
+ ath6kl_err("Unable to write to the device: %d\n",
+ ret);
+ return ret;
+ }
+ len_remain -= tx_len; addr += tx_len;
+ }
+
+ return 0;
+}
+
+int ath6kl_bmi_execute(struct ath6kl *ar, u32 addr, u32 *param)
+{
+ u32 cid = BMI_EXECUTE;
+ int ret;
+ u32 offset;
+ u16 size;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_err("bmi done sent already, cmd %d disallowed\n", cid);
+ return -EACCES;
+ }
+
+ size = sizeof(cid) + sizeof(addr) + sizeof(param);
+ if (size > MAX_BMI_CMDBUF_SZ) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ memset(ar->bmi.cmd_buf, 0, size);
+
+ ath6kl_dbg(ATH6KL_DBG_BMI, "bmi execute: addr: 0x%x, param: %d)\n",
+ addr, *param);
+
+ offset = 0;
+ memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
+ offset += sizeof(cid);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
+ offset += sizeof(addr);
+ memcpy(&(ar->bmi.cmd_buf[offset]), param, sizeof(*param));
+ offset += sizeof(*param);
+
+ ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ if (ret) {
+ ath6kl_err("Unable to write to the device: %d\n", ret);
+ return ret;
+ }
+
+ ret = ath6kl_bmi_recv_buf(ar, ar->bmi.cmd_buf, sizeof(*param), false);
+ if (ret) {
+ ath6kl_err("Unable to read from the device: %d\n", ret);
+ return ret;
+ }
+
+ memcpy(param, ar->bmi.cmd_buf, sizeof(*param));
+
+ return 0;
+}
+
+int ath6kl_bmi_set_app_start(struct ath6kl *ar, u32 addr)
+{
+ u32 cid = BMI_SET_APP_START;
+ int ret;
+ u32 offset;
+ u16 size;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_err("bmi done sent already, cmd %d disallowed\n", cid);
+ return -EACCES;
+ }
+
+ size = sizeof(cid) + sizeof(addr);
+ if (size > MAX_BMI_CMDBUF_SZ) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ memset(ar->bmi.cmd_buf, 0, size);
+
+ ath6kl_dbg(ATH6KL_DBG_BMI, "bmi set app start: addr: 0x%x\n", addr);
+
+ offset = 0;
+ memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
+ offset += sizeof(cid);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
+ offset += sizeof(addr);
+
+ ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ if (ret) {
+ ath6kl_err("Unable to write to the device: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+int ath6kl_bmi_reg_read(struct ath6kl *ar, u32 addr, u32 *param)
+{
+ u32 cid = BMI_READ_SOC_REGISTER;
+ int ret;
+ u32 offset;
+ u16 size;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_err("bmi done sent already, cmd %d disallowed\n", cid);
+ return -EACCES;
+ }
+
+ size = sizeof(cid) + sizeof(addr);
+ if (size > MAX_BMI_CMDBUF_SZ) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ memset(ar->bmi.cmd_buf, 0, size);
+
+ ath6kl_dbg(ATH6KL_DBG_BMI, "bmi read SOC reg: addr: 0x%x\n", addr);
+
+ offset = 0;
+ memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
+ offset += sizeof(cid);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
+ offset += sizeof(addr);
+
+ ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ if (ret) {
+ ath6kl_err("Unable to write to the device: %d\n", ret);
+ return ret;
+ }
+
+ ret = ath6kl_bmi_recv_buf(ar, ar->bmi.cmd_buf, sizeof(*param), true);
+ if (ret) {
+ ath6kl_err("Unable to read from the device: %d\n", ret);
+ return ret;
+ }
+ memcpy(param, ar->bmi.cmd_buf, sizeof(*param));
+
+ return 0;
+}
+
+int ath6kl_bmi_reg_write(struct ath6kl *ar, u32 addr, u32 param)
+{
+ u32 cid = BMI_WRITE_SOC_REGISTER;
+ int ret;
+ u32 offset;
+ u16 size;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_err("bmi done sent already, cmd %d disallowed\n", cid);
+ return -EACCES;
+ }
+
+ size = sizeof(cid) + sizeof(addr) + sizeof(param);
+ if (size > MAX_BMI_CMDBUF_SZ) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ memset(ar->bmi.cmd_buf, 0, size);
+
+ ath6kl_dbg(ATH6KL_DBG_BMI,
+ "bmi write SOC reg: addr: 0x%x, param: %d\n",
+ addr, param);
+
+ offset = 0;
+ memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
+ offset += sizeof(cid);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
+ offset += sizeof(addr);
+ memcpy(&(ar->bmi.cmd_buf[offset]), ¶m, sizeof(param));
+ offset += sizeof(param);
+
+ ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ if (ret) {
+ ath6kl_err("Unable to write to the device: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+int ath6kl_bmi_lz_data(struct ath6kl *ar, u8 *buf, u32 len)
+{
+ u32 cid = BMI_LZ_DATA;
+ int ret;
+ u32 offset;
+ u32 len_remain, tx_len;
+ const u32 header = sizeof(cid) + sizeof(len);
+ u16 size;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_err("bmi done sent already, cmd %d disallowed\n", cid);
+ return -EACCES;
+ }
+
+ size = BMI_DATASZ_MAX + header;
+ if (size > MAX_BMI_CMDBUF_SZ) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ memset(ar->bmi.cmd_buf, 0, size);
+
+ ath6kl_dbg(ATH6KL_DBG_BMI, "bmi send LZ data: len: %d)\n",
+ len);
+
+ len_remain = len;
+ while (len_remain) {
+ tx_len = (len_remain < (BMI_DATASZ_MAX - header)) ?
+ len_remain : (BMI_DATASZ_MAX - header);
+
+ offset = 0;
+ memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
+ offset += sizeof(cid);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &tx_len, sizeof(tx_len));
+ offset += sizeof(tx_len);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &buf[len - len_remain],
+ tx_len);
+ offset += tx_len;
+
+ ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ if (ret) {
+ ath6kl_err("Unable to write to the device: %d\n",
+ ret);
+ return ret;
+ }
+
+ len_remain -= tx_len;
+ }
+
+ return 0;
+}
+
+int ath6kl_bmi_lz_stream_start(struct ath6kl *ar, u32 addr)
+{
+ u32 cid = BMI_LZ_STREAM_START;
+ int ret;
+ u32 offset;
+ u16 size;
+
+ if (ar->bmi.done_sent) {
+ ath6kl_err("bmi done sent already, cmd %d disallowed\n", cid);
+ return -EACCES;
+ }
+
+ size = sizeof(cid) + sizeof(addr);
+ if (size > MAX_BMI_CMDBUF_SZ) {
+ WARN_ON(1);
+ return -EINVAL;
+ }
+ memset(ar->bmi.cmd_buf, 0, size);
+
+ ath6kl_dbg(ATH6KL_DBG_BMI,
+ "bmi LZ stream start: addr: 0x%x)\n",
+ addr);
+
+ offset = 0;
+ memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
+ offset += sizeof(cid);
+ memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
+ offset += sizeof(addr);
+
+ ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ if (ret) {
+ ath6kl_err("Unable to start LZ stream to the device: %d\n",
+ ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+int ath6kl_bmi_fast_download(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
+{
+ int ret;
+ u32 last_word = 0;
+ u32 last_word_offset = len & ~0x3;
+ u32 unaligned_bytes = len & 0x3;
+
+ ret = ath6kl_bmi_lz_stream_start(ar, addr);
+ if (ret)
+ return ret;
+
+ if (unaligned_bytes) {
+ /* copy the last word into a zero padded buffer */
+ memcpy(&last_word, &buf[last_word_offset], unaligned_bytes);
+ }
+
+ ret = ath6kl_bmi_lz_data(ar, buf, last_word_offset);
+ if (ret)
+ return ret;
+
+ if (unaligned_bytes)
+ ret = ath6kl_bmi_lz_data(ar, (u8 *)&last_word, 4);
+
+ if (!ret) {
+ /* Close compressed stream and open a new (fake) one.
+ * This serves mainly to flush Target caches. */
+ ret = ath6kl_bmi_lz_stream_start(ar, 0x00);
+ }
+ return ret;
+}
+
+int ath6kl_bmi_init(struct ath6kl *ar)
+{
+ ar->bmi.cmd_buf = kzalloc(MAX_BMI_CMDBUF_SZ, GFP_ATOMIC);
+
+ if (!ar->bmi.cmd_buf)
+ return -ENOMEM;
+
+ return 0;
+}
+
+void ath6kl_bmi_cleanup(struct ath6kl *ar)
+{
+ kfree(ar->bmi.cmd_buf);
+ ar->bmi.cmd_buf = NULL;
+}
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