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path: root/drivers/net/wireless/ath/ath6kl/bmi.c
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Diffstat (limited to 'drivers/net/wireless/ath/ath6kl/bmi.c')
-rw-r--r--drivers/net/wireless/ath/ath6kl/bmi.c244
1 files changed, 48 insertions, 196 deletions
diff --git a/drivers/net/wireless/ath/ath6kl/bmi.c b/drivers/net/wireless/ath/ath6kl/bmi.c
index c5d11cc536e0..bce3575c310a 100644
--- a/drivers/net/wireless/ath/ath6kl/bmi.c
+++ b/drivers/net/wireless/ath/ath6kl/bmi.c
@@ -19,165 +19,6 @@
#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("bmi communication timeout\n");
- return -ETIMEDOUT;
- }
-
- return 0;
-}
-
-static int ath6kl_bmi_get_rx_lkahd(struct ath6kl *ar)
-{
- unsigned long timeout;
- u32 rx_word = 0;
- int ret = 0;
-
- timeout = jiffies + msecs_to_jiffies(BMI_COMMUNICATION_TIMEOUT);
- while (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)
-{
- 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);
- 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;
@@ -190,14 +31,12 @@ int ath6kl_bmi_done(struct ath6kl *ar)
ar->bmi.done_sent = true;
- ret = ath6kl_bmi_send_buf(ar, (u8 *)&cid, sizeof(cid));
+ ret = ath6kl_hif_bmi_write(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;
}
@@ -212,13 +51,13 @@ int ath6kl_bmi_get_target_info(struct ath6kl *ar,
return -EACCES;
}
- ret = ath6kl_bmi_send_buf(ar, (u8 *)&cid, sizeof(cid));
+ ret = ath6kl_hif_bmi_write(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,
+ ret = ath6kl_hif_bmi_read(ar, (u8 *)&targ_info->version,
sizeof(targ_info->version));
if (ret) {
ath6kl_err("Unable to recv target info: %d\n", ret);
@@ -227,7 +66,7 @@ int ath6kl_bmi_get_target_info(struct ath6kl *ar,
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,
+ ret = ath6kl_hif_bmi_read(ar,
(u8 *)&targ_info->byte_count,
sizeof(targ_info->byte_count));
if (ret) {
@@ -246,7 +85,7 @@ int ath6kl_bmi_get_target_info(struct ath6kl *ar,
}
/* Read the remainder of the targ_info */
- ret = ath6kl_bmi_recv_buf(ar,
+ ret = ath6kl_hif_bmi_read(ar,
((u8 *)targ_info) +
sizeof(targ_info->byte_count),
sizeof(*targ_info) -
@@ -278,8 +117,8 @@ int ath6kl_bmi_read(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
return -EACCES;
}
- size = BMI_DATASZ_MAX + sizeof(cid) + sizeof(addr) + sizeof(len);
- if (size > MAX_BMI_CMDBUF_SZ) {
+ size = ar->bmi.max_data_size + sizeof(cid) + sizeof(addr) + sizeof(len);
+ if (size > ar->bmi.max_cmd_size) {
WARN_ON(1);
return -EINVAL;
}
@@ -292,8 +131,8 @@ int ath6kl_bmi_read(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
len_remain = len;
while (len_remain) {
- rx_len = (len_remain < BMI_DATASZ_MAX) ?
- len_remain : BMI_DATASZ_MAX;
+ rx_len = (len_remain < ar->bmi.max_data_size) ?
+ len_remain : ar->bmi.max_data_size;
offset = 0;
memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
offset += sizeof(cid);
@@ -302,13 +141,13 @@ int ath6kl_bmi_read(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
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);
+ ret = ath6kl_hif_bmi_write(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);
+ ret = ath6kl_hif_bmi_read(ar, ar->bmi.cmd_buf, rx_len);
if (ret) {
ath6kl_err("Unable to read from the device: %d\n",
ret);
@@ -328,7 +167,7 @@ int ath6kl_bmi_write(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
u32 offset;
u32 len_remain, tx_len;
const u32 header = sizeof(cid) + sizeof(addr) + sizeof(len);
- u8 aligned_buf[BMI_DATASZ_MAX];
+ u8 aligned_buf[400];
u8 *src;
if (ar->bmi.done_sent) {
@@ -336,12 +175,15 @@ int ath6kl_bmi_write(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
return -EACCES;
}
- if ((BMI_DATASZ_MAX + header) > MAX_BMI_CMDBUF_SZ) {
+ if ((ar->bmi.max_data_size + header) > ar->bmi.max_cmd_size) {
WARN_ON(1);
return -EINVAL;
}
- memset(ar->bmi.cmd_buf, 0, BMI_DATASZ_MAX + header);
+ if (WARN_ON(ar->bmi.max_data_size > sizeof(aligned_buf)))
+ return -E2BIG;
+
+ memset(ar->bmi.cmd_buf, 0, ar->bmi.max_data_size + header);
ath6kl_dbg(ATH6KL_DBG_BMI,
"bmi write memory: addr: 0x%x, len: %d\n", addr, len);
@@ -350,7 +192,7 @@ int ath6kl_bmi_write(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
while (len_remain) {
src = &buf[len - len_remain];
- if (len_remain < (BMI_DATASZ_MAX - header)) {
+ if (len_remain < (ar->bmi.max_data_size - header)) {
if (len_remain & 3) {
/* align it with 4 bytes */
len_remain = len_remain +
@@ -360,7 +202,7 @@ int ath6kl_bmi_write(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
}
tx_len = len_remain;
} else {
- tx_len = (BMI_DATASZ_MAX - header);
+ tx_len = (ar->bmi.max_data_size - header);
}
offset = 0;
@@ -373,7 +215,7 @@ int ath6kl_bmi_write(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
memcpy(&(ar->bmi.cmd_buf[offset]), src, tx_len);
offset += tx_len;
- ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ ret = ath6kl_hif_bmi_write(ar, ar->bmi.cmd_buf, offset);
if (ret) {
ath6kl_err("Unable to write to the device: %d\n",
ret);
@@ -398,7 +240,7 @@ int ath6kl_bmi_execute(struct ath6kl *ar, u32 addr, u32 *param)
}
size = sizeof(cid) + sizeof(addr) + sizeof(param);
- if (size > MAX_BMI_CMDBUF_SZ) {
+ if (size > ar->bmi.max_cmd_size) {
WARN_ON(1);
return -EINVAL;
}
@@ -415,13 +257,13 @@ int ath6kl_bmi_execute(struct ath6kl *ar, u32 addr, u32 *param)
memcpy(&(ar->bmi.cmd_buf[offset]), param, sizeof(*param));
offset += sizeof(*param);
- ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ ret = ath6kl_hif_bmi_write(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));
+ ret = ath6kl_hif_bmi_read(ar, ar->bmi.cmd_buf, sizeof(*param));
if (ret) {
ath6kl_err("Unable to read from the device: %d\n", ret);
return ret;
@@ -445,7 +287,7 @@ int ath6kl_bmi_set_app_start(struct ath6kl *ar, u32 addr)
}
size = sizeof(cid) + sizeof(addr);
- if (size > MAX_BMI_CMDBUF_SZ) {
+ if (size > ar->bmi.max_cmd_size) {
WARN_ON(1);
return -EINVAL;
}
@@ -459,7 +301,7 @@ int ath6kl_bmi_set_app_start(struct ath6kl *ar, u32 addr)
memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
offset += sizeof(addr);
- ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ ret = ath6kl_hif_bmi_write(ar, ar->bmi.cmd_buf, offset);
if (ret) {
ath6kl_err("Unable to write to the device: %d\n", ret);
return ret;
@@ -481,7 +323,7 @@ int ath6kl_bmi_reg_read(struct ath6kl *ar, u32 addr, u32 *param)
}
size = sizeof(cid) + sizeof(addr);
- if (size > MAX_BMI_CMDBUF_SZ) {
+ if (size > ar->bmi.max_cmd_size) {
WARN_ON(1);
return -EINVAL;
}
@@ -495,13 +337,13 @@ int ath6kl_bmi_reg_read(struct ath6kl *ar, u32 addr, u32 *param)
memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
offset += sizeof(addr);
- ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ ret = ath6kl_hif_bmi_write(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));
+ ret = ath6kl_hif_bmi_read(ar, ar->bmi.cmd_buf, sizeof(*param));
if (ret) {
ath6kl_err("Unable to read from the device: %d\n", ret);
return ret;
@@ -524,7 +366,7 @@ int ath6kl_bmi_reg_write(struct ath6kl *ar, u32 addr, u32 param)
}
size = sizeof(cid) + sizeof(addr) + sizeof(param);
- if (size > MAX_BMI_CMDBUF_SZ) {
+ if (size > ar->bmi.max_cmd_size) {
WARN_ON(1);
return -EINVAL;
}
@@ -542,7 +384,7 @@ int ath6kl_bmi_reg_write(struct ath6kl *ar, u32 addr, u32 param)
memcpy(&(ar->bmi.cmd_buf[offset]), &param, sizeof(param));
offset += sizeof(param);
- ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ ret = ath6kl_hif_bmi_write(ar, ar->bmi.cmd_buf, offset);
if (ret) {
ath6kl_err("Unable to write to the device: %d\n", ret);
return ret;
@@ -565,8 +407,8 @@ int ath6kl_bmi_lz_data(struct ath6kl *ar, u8 *buf, u32 len)
return -EACCES;
}
- size = BMI_DATASZ_MAX + header;
- if (size > MAX_BMI_CMDBUF_SZ) {
+ size = ar->bmi.max_data_size + header;
+ if (size > ar->bmi.max_cmd_size) {
WARN_ON(1);
return -EINVAL;
}
@@ -577,8 +419,8 @@ int ath6kl_bmi_lz_data(struct ath6kl *ar, u8 *buf, u32 len)
len_remain = len;
while (len_remain) {
- tx_len = (len_remain < (BMI_DATASZ_MAX - header)) ?
- len_remain : (BMI_DATASZ_MAX - header);
+ tx_len = (len_remain < (ar->bmi.max_data_size - header)) ?
+ len_remain : (ar->bmi.max_data_size - header);
offset = 0;
memcpy(&(ar->bmi.cmd_buf[offset]), &cid, sizeof(cid));
@@ -589,7 +431,7 @@ int ath6kl_bmi_lz_data(struct ath6kl *ar, u8 *buf, u32 len)
tx_len);
offset += tx_len;
- ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ ret = ath6kl_hif_bmi_write(ar, ar->bmi.cmd_buf, offset);
if (ret) {
ath6kl_err("Unable to write to the device: %d\n",
ret);
@@ -615,7 +457,7 @@ int ath6kl_bmi_lz_stream_start(struct ath6kl *ar, u32 addr)
}
size = sizeof(cid) + sizeof(addr);
- if (size > MAX_BMI_CMDBUF_SZ) {
+ if (size > ar->bmi.max_cmd_size) {
WARN_ON(1);
return -EINVAL;
}
@@ -631,7 +473,7 @@ int ath6kl_bmi_lz_stream_start(struct ath6kl *ar, u32 addr)
memcpy(&(ar->bmi.cmd_buf[offset]), &addr, sizeof(addr));
offset += sizeof(addr);
- ret = ath6kl_bmi_send_buf(ar, ar->bmi.cmd_buf, offset);
+ ret = ath6kl_hif_bmi_write(ar, ar->bmi.cmd_buf, offset);
if (ret) {
ath6kl_err("Unable to start LZ stream to the device: %d\n",
ret);
@@ -672,10 +514,20 @@ int ath6kl_bmi_fast_download(struct ath6kl *ar, u32 addr, u8 *buf, u32 len)
return ret;
}
+void ath6kl_bmi_reset(struct ath6kl *ar)
+{
+ ar->bmi.done_sent = false;
+}
+
int ath6kl_bmi_init(struct ath6kl *ar)
{
- ar->bmi.cmd_buf = kzalloc(MAX_BMI_CMDBUF_SZ, GFP_ATOMIC);
+ if (WARN_ON(ar->bmi.max_data_size == 0))
+ return -EINVAL;
+
+ /* cmd + addr + len + data_size */
+ ar->bmi.max_cmd_size = ar->bmi.max_data_size + (sizeof(u32) * 3);
+ ar->bmi.cmd_buf = kzalloc(ar->bmi.max_cmd_size, GFP_ATOMIC);
if (!ar->bmi.cmd_buf)
return -ENOMEM;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.