[PATCH] libertas: improve function init/shutdown handling for SD8688
Bing Zhao
bzhao at marvell.com
Mon Jun 1 21:04:36 EDT 2009
This patch is to incorporate Dan Williams' comments for commit:
"libertas: implement function init/shutdown commands for SD8688"
1. remove fn_init_required and fn_shutdown_required variables from
lbs_private structure. If required, __lbs_cmd() will be called
directly to send function init/shutdown command for SD8688 in
if_sdio_probe() or if_sdio_remove() callback.
2. add global variable "user_rmmod" to distinguish between the module
removal case and the card removal case. This flag will be checked in
if_sdio_remove() against SD8688 card to determine whether or not the
function shutdown command needs to be sent.
3. remove "card" from if_sdio_model structure as it cannot store
card pointers for multiple cards. Besides, it's no longer needed
to store the "card" pointer with changes #1 & #2 above.
Signed-off-by: Bing Zhao <bzhao at marvell.com>
---
drivers/net/wireless/libertas/dev.h | 2 -
drivers/net/wireless/libertas/if_sdio.c | 76 +++++++++++++++++++------------
drivers/net/wireless/libertas/main.c | 20 --------
3 files changed, 47 insertions(+), 51 deletions(-)
diff --git a/drivers/net/wireless/libertas/dev.h b/drivers/net/wireless/libertas/dev.h
index 9e11f90..f9ec69e 100644
--- a/drivers/net/wireless/libertas/dev.h
+++ b/drivers/net/wireless/libertas/dev.h
@@ -321,8 +321,6 @@ struct lbs_private {
u32 monitormode;
u8 fw_ready;
- u8 fn_init_required;
- u8 fn_shutdown_required;
};
extern struct cmd_confirm_sleep confirm_sleep;
diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index a7e3fc1..8cdb88c 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -39,8 +39,24 @@
#include "decl.h"
#include "defs.h"
#include "dev.h"
+#include "cmd.h"
#include "if_sdio.h"
+/* The if_sdio_remove() callback function is called when
+ * user removes this module from kernel space or ejects
+ * the card from the slot. The driver handles these 2 cases
+ * differently for SD8688 combo chip.
+ * If the user is removing the module, the FUNC_SHUTDOWN
+ * command for SD8688 is sent to the firmware.
+ * If the card is removed, there is no need to send this command.
+ *
+ * The variable 'user_rmmod' is used to distinguish these two
+ * scenarios. This flag is initialized as FALSE in case the card
+ * is removed, and will be set to TRUE for module removal when
+ * module_exit function is called.
+ */
+static u8 user_rmmod;
+
static char *lbs_helper_name = NULL;
module_param_named(helper_name, lbs_helper_name, charp, 0644);
@@ -61,7 +77,6 @@ struct if_sdio_model {
int model;
const char *helper;
const char *firmware;
- struct if_sdio_card *card;
};
static struct if_sdio_model if_sdio_models[] = {
@@ -70,21 +85,18 @@ static struct if_sdio_model if_sdio_models[] = {
.model = IF_SDIO_MODEL_8385,
.helper = "sd8385_helper.bin",
.firmware = "sd8385.bin",
- .card = NULL,
},
{
/* 8686 */
.model = IF_SDIO_MODEL_8686,
.helper = "sd8686_helper.bin",
.firmware = "sd8686.bin",
- .card = NULL,
},
{
/* 8688 */
.model = IF_SDIO_MODEL_8688,
.helper = "sd8688_helper.bin",
.firmware = "sd8688.bin",
- .card = NULL,
},
};
@@ -927,8 +939,6 @@ static int if_sdio_probe(struct sdio_func *func,
goto free;
}
- if_sdio_models[i].card = card;
-
card->helper = if_sdio_models[i].helper;
card->firmware = if_sdio_models[i].firmware;
@@ -1014,8 +1024,16 @@ static int if_sdio_probe(struct sdio_func *func,
/*
* FUNC_INIT is required for SD8688 WLAN/BT multiple functions
*/
- priv->fn_init_required =
- (card->model == IF_SDIO_MODEL_8688) ? 1 : 0;
+ if (card->model == IF_SDIO_MODEL_8688) {
+ struct cmd_header cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+
+ lbs_deb_sdio("send function INIT command\n");
+ if (__lbs_cmd(priv, CMD_FUNC_INIT, &cmd, sizeof(cmd),
+ lbs_cmd_copyback, (unsigned long) &cmd))
+ lbs_pr_alert("CMD_FUNC_INIT cmd failed\n");
+ }
ret = lbs_start_card(priv);
if (ret)
@@ -1057,30 +1075,39 @@ static void if_sdio_remove(struct sdio_func *func)
{
struct if_sdio_card *card;
struct if_sdio_packet *packet;
- int ret;
lbs_deb_enter(LBS_DEB_SDIO);
card = sdio_get_drvdata(func);
- lbs_stop_card(card->priv);
+ if (user_rmmod && (card->model == IF_SDIO_MODEL_8688)) {
+ /*
+ * FUNC_SHUTDOWN is required for SD8688 WLAN/BT
+ * multiple functions
+ */
+ struct cmd_header cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+
+ lbs_deb_sdio("send function SHUTDOWN command\n");
+ if (__lbs_cmd(card->priv, CMD_FUNC_SHUTDOWN,
+ &cmd, sizeof(cmd), lbs_cmd_copyback,
+ (unsigned long) &cmd))
+ lbs_pr_alert("CMD_FUNC_SHUTDOWN cmd failed\n");
+ }
card->priv->surpriseremoved = 1;
lbs_deb_sdio("call remove card\n");
+ lbs_stop_card(card->priv);
lbs_remove_card(card->priv);
flush_workqueue(card->workqueue);
destroy_workqueue(card->workqueue);
sdio_claim_host(func);
-
- /* Disable interrupts */
- sdio_writeb(func, 0x00, IF_SDIO_H_INT_MASK, &ret);
-
sdio_release_irq(func);
sdio_disable_func(func);
-
sdio_release_host(func);
while (card->packets) {
@@ -1116,6 +1143,9 @@ static int __init if_sdio_init_module(void)
ret = sdio_register_driver(&if_sdio_driver);
+ /* Clear the flag in case user removes the card. */
+ user_rmmod = 0;
+
lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
return ret;
@@ -1123,22 +1153,10 @@ static int __init if_sdio_init_module(void)
static void __exit if_sdio_exit_module(void)
{
- int i;
- struct if_sdio_card *card;
-
lbs_deb_enter(LBS_DEB_SDIO);
- for (i = 0; i < ARRAY_SIZE(if_sdio_models); i++) {
- card = if_sdio_models[i].card;
-
- /*
- * FUNC_SHUTDOWN is required for SD8688 WLAN/BT
- * multiple functions
- */
- if (card && card->priv)
- card->priv->fn_shutdown_required =
- (card->model == IF_SDIO_MODEL_8688) ? 1 : 0;
- }
+ /* Set the flag as user is removing this module. */
+ user_rmmod = 1;
sdio_unregister_driver(&if_sdio_driver);
diff --git a/drivers/net/wireless/libertas/main.c b/drivers/net/wireless/libertas/main.c
index a58a123..89575e4 100644
--- a/drivers/net/wireless/libertas/main.c
+++ b/drivers/net/wireless/libertas/main.c
@@ -1002,17 +1002,9 @@ static int lbs_setup_firmware(struct lbs_private *priv)
{
int ret = -1;
s16 curlevel = 0, minlevel = 0, maxlevel = 0;
- struct cmd_header cmd;
lbs_deb_enter(LBS_DEB_FW);
- if (priv->fn_init_required) {
- memset(&cmd, 0, sizeof(cmd));
- if (__lbs_cmd(priv, CMD_FUNC_INIT, &cmd, sizeof(cmd),
- lbs_cmd_copyback, (unsigned long) &cmd))
- lbs_pr_alert("CMD_FUNC_INIT command failed\n");
- }
-
/* Read MAC address from firmware */
memset(priv->current_addr, 0xff, ETH_ALEN);
ret = lbs_update_hw_spec(priv);
@@ -1200,9 +1192,6 @@ struct lbs_private *lbs_add_card(void *card, struct device *dmdev)
priv->mesh_open = 0;
priv->infra_open = 0;
- priv->fn_init_required = 0;
- priv->fn_shutdown_required = 0;
-
/* Setup the OS Interface to our functions */
dev->netdev_ops = &lbs_netdev_ops;
dev->watchdog_timeo = 5 * HZ;
@@ -1384,20 +1373,11 @@ void lbs_stop_card(struct lbs_private *priv)
struct net_device *dev;
struct cmd_ctrl_node *cmdnode;
unsigned long flags;
- struct cmd_header cmd;
lbs_deb_enter(LBS_DEB_MAIN);
if (!priv)
goto out;
-
- if (priv->fn_shutdown_required) {
- memset(&cmd, 0, sizeof(cmd));
- if (__lbs_cmd(priv, CMD_FUNC_SHUTDOWN, &cmd, sizeof(cmd),
- lbs_cmd_copyback, (unsigned long) &cmd))
- lbs_pr_alert("CMD_FUNC_SHUTDOWN command failed\n");
- }
-
dev = priv->dev;
netif_stop_queue(dev);
--
1.5.3.6
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