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linux/drivers/net/wireless/mwifiex/sdio.c
Zhaoyang Liu 4acaf048b1 mwifiex: recover from skb allocation failures during RX 
This patch adds recovery mechanism for SDIO RX during SKB allocation
failures.
For allocation failures during multiport aggregation, we skip and drop RX
packets.
For single port read case, we will use preallocated card->mpa_rx.buf to
complete cmd53 read.
Now we terminate SDIO operations only upon cmd53 failures.

CC: James Cameron <quozl@laptop.org>
Signed-off-by: Zhaoyang Liu <liuzy@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2015-03-30 11:34:51 +03:00

2441 lines
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/*
* Marvell Wireless LAN device driver: SDIO specific handling
*
* Copyright (C) 2011-2014, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available by writing to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
#include <linux/firmware.h>
#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"
#include "11n.h"
#include "sdio.h"
#define SDIO_VERSION "1.0"
/* The mwifiex_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.
* If the user is removing the module, the few commands (FUNC_SHUTDOWN,
* HS_CANCEL etc.) are sent to the firmware.
* If the card is removed, there is no need to send these 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 struct mwifiex_if_ops sdio_ops;
static unsigned long iface_work_flags;
static struct semaphore add_remove_card_sem;
static struct memory_type_mapping mem_type_mapping_tbl[] = {
{"ITCM", NULL, 0, 0xF0},
{"DTCM", NULL, 0, 0xF1},
{"SQRAM", NULL, 0, 0xF2},
{"APU", NULL, 0, 0xF3},
{"CIU", NULL, 0, 0xF4},
{"ICU", NULL, 0, 0xF5},
{"MAC", NULL, 0, 0xF6},
{"EXT7", NULL, 0, 0xF7},
{"EXT8", NULL, 0, 0xF8},
{"EXT9", NULL, 0, 0xF9},
{"EXT10", NULL, 0, 0xFA},
{"EXT11", NULL, 0, 0xFB},
{"EXT12", NULL, 0, 0xFC},
{"EXT13", NULL, 0, 0xFD},
{"EXTLAST", NULL, 0, 0xFE},
};
/*
* SDIO probe.
*
* This function probes an mwifiex device and registers it. It allocates
* the card structure, enables SDIO function number and initiates the
* device registration and initialization procedure by adding a logical
* interface.
*/
static int
mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
{
int ret;
struct sdio_mmc_card *card = NULL;
pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
func->vendor, func->device, func->class, func->num);
card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
if (!card)
return -ENOMEM;
card->func = func;
func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
if (id->driver_data) {
struct mwifiex_sdio_device *data = (void *)id->driver_data;
card->firmware = data->firmware;
card->reg = data->reg;
card->max_ports = data->max_ports;
card->mp_agg_pkt_limit = data->mp_agg_pkt_limit;
card->supports_sdio_new_mode = data->supports_sdio_new_mode;
card->has_control_mask = data->has_control_mask;
card->tx_buf_size = data->tx_buf_size;
card->mp_tx_agg_buf_size = data->mp_tx_agg_buf_size;
card->mp_rx_agg_buf_size = data->mp_rx_agg_buf_size;
card->can_dump_fw = data->can_dump_fw;
card->can_auto_tdls = data->can_auto_tdls;
card->can_ext_scan = data->can_ext_scan;
}
sdio_claim_host(func);
ret = sdio_enable_func(func);
sdio_release_host(func);
if (ret) {
pr_err("%s: failed to enable function\n", __func__);
kfree(card);
return -EIO;
}
if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
MWIFIEX_SDIO)) {
pr_err("%s: add card failed\n", __func__);
kfree(card);
sdio_claim_host(func);
ret = sdio_disable_func(func);
sdio_release_host(func);
ret = -1;
}
return ret;
}
/*
* SDIO resume.
*
* Kernel needs to suspend all functions separately. Therefore all
* registered functions must have drivers with suspend and resume
* methods. Failing that the kernel simply removes the whole card.
*
* If already not resumed, this function turns on the traffic and
* sends a host sleep cancel request to the firmware.
*/
static int mwifiex_sdio_resume(struct device *dev)
{
struct sdio_func *func = dev_to_sdio_func(dev);
struct sdio_mmc_card *card;
struct mwifiex_adapter *adapter;
mmc_pm_flag_t pm_flag = 0;
if (func) {
pm_flag = sdio_get_host_pm_caps(func);
card = sdio_get_drvdata(func);
if (!card || !card->adapter) {
pr_err("resume: invalid card or adapter\n");
return 0;
}
} else {
pr_err("resume: sdio_func is not specified\n");
return 0;
}
adapter = card->adapter;
if (!adapter->is_suspended) {
dev_warn(adapter->dev, "device already resumed\n");
return 0;
}
adapter->is_suspended = false;
/* Disable Host Sleep */
mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
MWIFIEX_ASYNC_CMD);
return 0;
}
/*
* SDIO remove.
*
* This function removes the interface and frees up the card structure.
*/
static void
mwifiex_sdio_remove(struct sdio_func *func)
{
struct sdio_mmc_card *card;
struct mwifiex_adapter *adapter;
struct mwifiex_private *priv;
pr_debug("info: SDIO func num=%d\n", func->num);
card = sdio_get_drvdata(func);
if (!card)
return;
adapter = card->adapter;
if (!adapter || !adapter->priv_num)
return;
if (user_rmmod) {
if (adapter->is_suspended)
mwifiex_sdio_resume(adapter->dev);
mwifiex_deauthenticate_all(adapter);
priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
mwifiex_disable_auto_ds(priv);
mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
}
mwifiex_remove_card(card->adapter, &add_remove_card_sem);
}
/*
* SDIO suspend.
*
* Kernel needs to suspend all functions separately. Therefore all
* registered functions must have drivers with suspend and resume
* methods. Failing that the kernel simply removes the whole card.
*
* If already not suspended, this function allocates and sends a host
* sleep activate request to the firmware and turns off the traffic.
*/
static int mwifiex_sdio_suspend(struct device *dev)
{
struct sdio_func *func = dev_to_sdio_func(dev);
struct sdio_mmc_card *card;
struct mwifiex_adapter *adapter;
mmc_pm_flag_t pm_flag = 0;
int ret = 0;
if (func) {
pm_flag = sdio_get_host_pm_caps(func);
pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
sdio_func_id(func), pm_flag);
if (!(pm_flag & MMC_PM_KEEP_POWER)) {
pr_err("%s: cannot remain alive while host is"
" suspended\n", sdio_func_id(func));
return -ENOSYS;
}
card = sdio_get_drvdata(func);
if (!card || !card->adapter) {
pr_err("suspend: invalid card or adapter\n");
return 0;
}
} else {
pr_err("suspend: sdio_func is not specified\n");
return 0;
}
adapter = card->adapter;
/* Enable the Host Sleep */
if (!mwifiex_enable_hs(adapter)) {
dev_err(adapter->dev, "cmd: failed to suspend\n");
adapter->hs_enabling = false;
return -EFAULT;
}
dev_dbg(adapter->dev, "cmd: suspend with MMC_PM_KEEP_POWER\n");
ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
/* Indicate device suspended */
adapter->is_suspended = true;
adapter->hs_enabling = false;
return ret;
}
/* Device ID for SD8786 */
#define SDIO_DEVICE_ID_MARVELL_8786 (0x9116)
/* Device ID for SD8787 */
#define SDIO_DEVICE_ID_MARVELL_8787 (0x9119)
/* Device ID for SD8797 */
#define SDIO_DEVICE_ID_MARVELL_8797 (0x9129)
/* Device ID for SD8897 */
#define SDIO_DEVICE_ID_MARVELL_8897 (0x912d)
/* Device ID for SD8887 */
#define SDIO_DEVICE_ID_MARVELL_8887 (0x9135)
/* Device ID for SD8801 */
#define SDIO_DEVICE_ID_MARVELL_8801 (0x9139)
/* WLAN IDs */
static const struct sdio_device_id mwifiex_ids[] = {
{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786),
.driver_data = (unsigned long) &mwifiex_sdio_sd8786},
{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787),
.driver_data = (unsigned long) &mwifiex_sdio_sd8787},
{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797),
.driver_data = (unsigned long) &mwifiex_sdio_sd8797},
{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8897),
.driver_data = (unsigned long) &mwifiex_sdio_sd8897},
{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8887),
.driver_data = (unsigned long)&mwifiex_sdio_sd8887},
{SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8801),
.driver_data = (unsigned long)&mwifiex_sdio_sd8801},
{},
};
MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
.suspend = mwifiex_sdio_suspend,
.resume = mwifiex_sdio_resume,
};
static struct sdio_driver mwifiex_sdio = {
.name = "mwifiex_sdio",
.id_table = mwifiex_ids,
.probe = mwifiex_sdio_probe,
.remove = mwifiex_sdio_remove,
.drv = {
.owner = THIS_MODULE,
.pm = &mwifiex_sdio_pm_ops,
}
};
/* Write data into SDIO card register. Caller claims SDIO device. */
static int
mwifiex_write_reg_locked(struct sdio_func *func, u32 reg, u8 data)
{
int ret = -1;
sdio_writeb(func, data, reg, &ret);
return ret;
}
/*
* This function writes data into SDIO card register.
*/
static int
mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u8 data)
{
struct sdio_mmc_card *card = adapter->card;
int ret;
sdio_claim_host(card->func);
ret = mwifiex_write_reg_locked(card->func, reg, data);
sdio_release_host(card->func);
return ret;
}
/*
* This function reads data from SDIO card register.
*/
static int
mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u8 *data)
{
struct sdio_mmc_card *card = adapter->card;
int ret = -1;
u8 val;
sdio_claim_host(card->func);
val = sdio_readb(card->func, reg, &ret);
sdio_release_host(card->func);
*data = val;
return ret;
}
/*
* This function writes multiple data into SDIO card memory.
*
* This does not work in suspended mode.
*/
static int
mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
u8 *buffer, u32 pkt_len, u32 port)
{
struct sdio_mmc_card *card = adapter->card;
int ret;
u8 blk_mode =
(port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
u32 blk_cnt =
(blk_mode ==
BLOCK_MODE) ? (pkt_len /
MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
if (adapter->is_suspended) {
dev_err(adapter->dev,
"%s: not allowed while suspended\n", __func__);
return -1;
}
sdio_claim_host(card->func);
ret = sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size);
sdio_release_host(card->func);
return ret;
}
/*
* This function reads multiple data from SDIO card memory.
*/
static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
u32 len, u32 port, u8 claim)
{
struct sdio_mmc_card *card = adapter->card;
int ret;
u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
: BLOCK_MODE;
u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
: len;
u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
if (claim)
sdio_claim_host(card->func);
ret = sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size);
if (claim)
sdio_release_host(card->func);
return ret;
}
/*
* This function wakes up the card.
*
* A host power up command is written to the card configuration
* register to wake up the card.
*/
static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
{
dev_dbg(adapter->dev, "event: wakeup device...\n");
return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
}
/*
* This function is called after the card has woken up.
*
* The card configuration register is reset.
*/
static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
{
dev_dbg(adapter->dev, "cmd: wakeup device completed\n");
return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
}
/*
* This function is used to initialize IO ports for the
* chipsets supporting SDIO new mode eg SD8897.
*/
static int mwifiex_init_sdio_new_mode(struct mwifiex_adapter *adapter)
{
u8 reg;
struct sdio_mmc_card *card = adapter->card;
adapter->ioport = MEM_PORT;
/* enable sdio new mode */
if (mwifiex_read_reg(adapter, card->reg->card_cfg_2_1_reg, &reg))
return -1;
if (mwifiex_write_reg(adapter, card->reg->card_cfg_2_1_reg,
reg | CMD53_NEW_MODE))
return -1;
/* Configure cmd port and enable reading rx length from the register */
if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_0, &reg))
return -1;
if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_0,
reg | CMD_PORT_RD_LEN_EN))
return -1;
/* Enable Dnld/Upld ready auto reset for cmd port after cmd53 is
* completed
*/
if (mwifiex_read_reg(adapter, card->reg->cmd_cfg_1, &reg))
return -1;
if (mwifiex_write_reg(adapter, card->reg->cmd_cfg_1,
reg | CMD_PORT_AUTO_EN))
return -1;
return 0;
}
/* This function initializes the IO ports.
*
* The following operations are performed -
* - Read the IO ports (0, 1 and 2)
* - Set host interrupt Reset-To-Read to clear
* - Set auto re-enable interrupt
*/
static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
{
u8 reg;
struct sdio_mmc_card *card = adapter->card;
adapter->ioport = 0;
if (card->supports_sdio_new_mode) {
if (mwifiex_init_sdio_new_mode(adapter))
return -1;
goto cont;
}
/* Read the IO port */
if (!mwifiex_read_reg(adapter, card->reg->io_port_0_reg, &reg))
adapter->ioport |= (reg & 0xff);
else
return -1;
if (!mwifiex_read_reg(adapter, card->reg->io_port_1_reg, &reg))
adapter->ioport |= ((reg & 0xff) << 8);
else
return -1;
if (!mwifiex_read_reg(adapter, card->reg->io_port_2_reg, &reg))
adapter->ioport |= ((reg & 0xff) << 16);
else
return -1;
cont:
pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
/* Set Host interrupt reset to read to clear */
if (!mwifiex_read_reg(adapter, card->reg->host_int_rsr_reg, &reg))
mwifiex_write_reg(adapter, card->reg->host_int_rsr_reg,
reg | card->reg->sdio_int_mask);
else
return -1;
/* Dnld/Upld ready set to auto reset */
if (!mwifiex_read_reg(adapter, card->reg->card_misc_cfg_reg, &reg))
mwifiex_write_reg(adapter, card->reg->card_misc_cfg_reg,
reg | AUTO_RE_ENABLE_INT);
else
return -1;
return 0;
}
/*
* This function sends data to the card.
*/
static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
u8 *payload, u32 pkt_len, u32 port)
{
u32 i = 0;
int ret;
do {
ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
if (ret) {
i++;
dev_err(adapter->dev, "host_to_card, write iomem"
" (%d) failed: %d\n", i, ret);
if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
dev_err(adapter->dev, "write CFG reg failed\n");
ret = -1;
if (i > MAX_WRITE_IOMEM_RETRY)
return ret;
}
} while (ret == -1);
return ret;
}
/*
* This function gets the read port.
*
* If control port bit is set in MP read bitmap, the control port
* is returned, otherwise the current read port is returned and
* the value is increased (provided it does not reach the maximum
* limit, in which case it is reset to 1)
*/
static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
{
struct sdio_mmc_card *card = adapter->card;
const struct mwifiex_sdio_card_reg *reg = card->reg;
u32 rd_bitmap = card->mp_rd_bitmap;
dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%08x\n", rd_bitmap);
if (card->supports_sdio_new_mode) {
if (!(rd_bitmap & reg->data_port_mask))
return -1;
} else {
if (!(rd_bitmap & (CTRL_PORT_MASK | reg->data_port_mask)))
return -1;
}
if ((card->has_control_mask) &&
(card->mp_rd_bitmap & CTRL_PORT_MASK)) {
card->mp_rd_bitmap &= (u32) (~CTRL_PORT_MASK);
*port = CTRL_PORT;
dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%08x\n",
*port, card->mp_rd_bitmap);
return 0;
}
if (!(card->mp_rd_bitmap & (1 << card->curr_rd_port)))
return -1;
/* We are now handling the SDIO data ports */
card->mp_rd_bitmap &= (u32)(~(1 << card->curr_rd_port));
*port = card->curr_rd_port;
if (++card->curr_rd_port == card->max_ports)
card->curr_rd_port = reg->start_rd_port;
dev_dbg(adapter->dev,
"data: port=%d mp_rd_bitmap=0x%08x -> 0x%08x\n",
*port, rd_bitmap, card->mp_rd_bitmap);
return 0;
}
/*
* This function gets the write port for data.
*
* The current write port is returned if available and the value is
* increased (provided it does not reach the maximum limit, in which
* case it is reset to 1)
*/
static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u32 *port)
{
struct sdio_mmc_card *card = adapter->card;
const struct mwifiex_sdio_card_reg *reg = card->reg;
u32 wr_bitmap = card->mp_wr_bitmap;
dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%08x\n", wr_bitmap);
if (!(wr_bitmap & card->mp_data_port_mask)) {
adapter->data_sent = true;
return -EBUSY;
}
if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
card->mp_wr_bitmap &= (u32) (~(1 << card->curr_wr_port));
*port = card->curr_wr_port;
if (++card->curr_wr_port == card->mp_end_port)
card->curr_wr_port = reg->start_wr_port;
} else {
adapter->data_sent = true;
return -EBUSY;
}
if ((card->has_control_mask) && (*port == CTRL_PORT)) {
dev_err(adapter->dev,
"invalid data port=%d cur port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
*port, card->curr_wr_port, wr_bitmap,
card->mp_wr_bitmap);
return -1;
}
dev_dbg(adapter->dev, "data: port=%d mp_wr_bitmap=0x%08x -> 0x%08x\n",
*port, wr_bitmap, card->mp_wr_bitmap);
return 0;
}
/*
* This function polls the card status.
*/
static int
mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
{
struct sdio_mmc_card *card = adapter->card;
u32 tries;
u8 cs;
for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
if (mwifiex_read_reg(adapter, card->reg->poll_reg, &cs))
break;
else if ((cs & bits) == bits)
return 0;
usleep_range(10, 20);
}
dev_err(adapter->dev, "poll card status failed, tries = %d\n", tries);
return -1;
}
/*
* This function reads the firmware status.
*/
static int
mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
{
struct sdio_mmc_card *card = adapter->card;
const struct mwifiex_sdio_card_reg *reg = card->reg;
u8 fws0, fws1;
if (mwifiex_read_reg(adapter, reg->status_reg_0, &fws0))
return -1;
if (mwifiex_read_reg(adapter, reg->status_reg_1, &fws1))
return -1;
*dat = (u16) ((fws1 << 8) | fws0);
return 0;
}
/*
* This function disables the host interrupt.
*
* The host interrupt mask is read, the disable bit is reset and
* written back to the card host interrupt mask register.
*/
static void mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
struct sdio_func *func = card->func;
sdio_claim_host(func);
mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg, 0);
sdio_release_irq(func);
sdio_release_host(func);
}
/*
* This function reads the interrupt status from card.
*/
static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
u8 sdio_ireg;
unsigned long flags;
if (mwifiex_read_data_sync(adapter, card->mp_regs,
card->reg->max_mp_regs,
REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK, 0)) {
dev_err(adapter->dev, "read mp_regs failed\n");
return;
}
sdio_ireg = card->mp_regs[card->reg->host_int_status_reg];
if (sdio_ireg) {
/*
* DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
* For SDIO new mode CMD port interrupts
* DN_LD_CMD_PORT_HOST_INT_STATUS and/or
* UP_LD_CMD_PORT_HOST_INT_STATUS
* Clear the interrupt status register
*/
dev_dbg(adapter->dev, "int: sdio_ireg = %#x\n", sdio_ireg);
spin_lock_irqsave(&adapter->int_lock, flags);
adapter->int_status |= sdio_ireg;
spin_unlock_irqrestore(&adapter->int_lock, flags);
}
}
/*
* SDIO interrupt handler.
*
* This function reads the interrupt status from firmware and handles
* the interrupt in current thread (ksdioirqd) right away.
*/
static void
mwifiex_sdio_interrupt(struct sdio_func *func)
{
struct mwifiex_adapter *adapter;
struct sdio_mmc_card *card;
card = sdio_get_drvdata(func);
if (!card || !card->adapter) {
pr_debug("int: func=%p card=%p adapter=%p\n",
func, card, card ? card->adapter : NULL);
return;
}
adapter = card->adapter;
if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
adapter->ps_state = PS_STATE_AWAKE;
mwifiex_interrupt_status(adapter);
mwifiex_main_process(adapter);
}
/*
* This function enables the host interrupt.
*
* The host interrupt enable mask is written to the card
* host interrupt mask register.
*/
static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
struct sdio_func *func = card->func;
int ret;
sdio_claim_host(func);
/* Request the SDIO IRQ */
ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
if (ret) {
dev_err(adapter->dev, "claim irq failed: ret=%d\n", ret);
goto out;
}
/* Simply write the mask to the register */
ret = mwifiex_write_reg_locked(func, card->reg->host_int_mask_reg,
card->reg->host_int_enable);
if (ret) {
dev_err(adapter->dev, "enable host interrupt failed\n");
sdio_release_irq(func);
}
out:
sdio_release_host(func);
return ret;
}
/*
* This function sends a data buffer to the card.
*/
static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
u32 *type, u8 *buffer,
u32 npayload, u32 ioport)
{
int ret;
u32 nb;
if (!buffer) {
dev_err(adapter->dev, "%s: buffer is NULL\n", __func__);
return -1;
}
ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
if (ret) {
dev_err(adapter->dev, "%s: read iomem failed: %d\n", __func__,
ret);
return -1;
}
nb = le16_to_cpu(*(__le16 *) (buffer));
if (nb > npayload) {
dev_err(adapter->dev, "%s: invalid packet, nb=%d npayload=%d\n",
__func__, nb, npayload);
return -1;
}
*type = le16_to_cpu(*(__le16 *) (buffer + 2));
return ret;
}
/*
* This function downloads the firmware to the card.
*
* Firmware is downloaded to the card in blocks. Every block download
* is tested for CRC errors, and retried a number of times before
* returning failure.
*/
static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
struct mwifiex_fw_image *fw)
{
struct sdio_mmc_card *card = adapter->card;
const struct mwifiex_sdio_card_reg *reg = card->reg;
int ret;
u8 *firmware = fw->fw_buf;
u32 firmware_len = fw->fw_len;
u32 offset = 0;
u8 base0, base1;
u8 *fwbuf;
u16 len = 0;
u32 txlen, tx_blocks = 0, tries;
u32 i = 0;
if (!firmware_len) {
dev_err(adapter->dev,
"firmware image not found! Terminating download\n");
return -1;
}
dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
firmware_len);
/* Assume that the allocated buffer is 8-byte aligned */
fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
if (!fwbuf)
return -ENOMEM;
/* Perform firmware data transfer */
do {
/* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
bits */
ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
DN_LD_CARD_RDY);
if (ret) {
dev_err(adapter->dev, "FW download with helper:"
" poll status timeout @ %d\n", offset);
goto done;
}
/* More data? */
if (offset >= firmware_len)
break;
for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
ret = mwifiex_read_reg(adapter, reg->base_0_reg,
&base0);
if (ret) {
dev_err(adapter->dev,
"dev BASE0 register read failed: "
"base0=%#04X(%d). Terminating dnld\n",
base0, base0);
goto done;
}
ret = mwifiex_read_reg(adapter, reg->base_1_reg,
&base1);
if (ret) {
dev_err(adapter->dev,
"dev BASE1 register read failed: "
"base1=%#04X(%d). Terminating dnld\n",
base1, base1);
goto done;
}
len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
if (len)
break;
usleep_range(10, 20);
}
if (!len) {
break;
} else if (len > MWIFIEX_UPLD_SIZE) {
dev_err(adapter->dev,
"FW dnld failed @ %d, invalid length %d\n",
offset, len);
ret = -1;
goto done;
}
txlen = len;
if (len & BIT(0)) {
i++;
if (i > MAX_WRITE_IOMEM_RETRY) {
dev_err(adapter->dev,
"FW dnld failed @ %d, over max retry\n",
offset);
ret = -1;
goto done;
}
dev_err(adapter->dev, "CRC indicated by the helper:"
" len = 0x%04X, txlen = %d\n", len, txlen);
len &= ~BIT(0);
/* Setting this to 0 to resend from same offset */
txlen = 0;
} else {
i = 0;
/* Set blocksize to transfer - checking for last
block */
if (firmware_len - offset < txlen)
txlen = firmware_len - offset;
tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
/ MWIFIEX_SDIO_BLOCK_SIZE;
/* Copy payload to buffer */
memmove(fwbuf, &firmware[offset], txlen);
}
ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
MWIFIEX_SDIO_BLOCK_SIZE,
adapter->ioport);
if (ret) {
dev_err(adapter->dev,
"FW download, write iomem (%d) failed @ %d\n",
i, offset);
if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
dev_err(adapter->dev, "write CFG reg failed\n");
ret = -1;
goto done;
}
offset += txlen;
} while (true);
dev_notice(adapter->dev,
"info: FW download over, size %d bytes\n", offset);
ret = 0;
done:
kfree(fwbuf);
return ret;
}
/*
* This function checks the firmware status in card.
*
* The winner interface is also determined by this function.
*/
static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
u32 poll_num)
{
struct sdio_mmc_card *card = adapter->card;
int ret = 0;
u16 firmware_stat;
u32 tries;
u8 winner_status;
/* Wait for firmware initialization event */
for (tries = 0; tries < poll_num; tries++) {
ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
if (ret)
continue;
if (firmware_stat == FIRMWARE_READY_SDIO) {
ret = 0;
break;
} else {
msleep(100);
ret = -1;
}
}
if (ret) {
if (mwifiex_read_reg
(adapter, card->reg->status_reg_0, &winner_status))
winner_status = 0;
if (winner_status)
adapter->winner = 0;
else
adapter->winner = 1;
}
return ret;
}
/*
* This function decode sdio aggreation pkt.
*
* Based on the the data block size and pkt_len,
* skb data will be decoded to few packets.
*/
static void mwifiex_deaggr_sdio_pkt(struct mwifiex_adapter *adapter,
struct sk_buff *skb)
{
u32 total_pkt_len, pkt_len;
struct sk_buff *skb_deaggr;
u32 pkt_type;
u16 blk_size;
u8 blk_num;
u8 *data;
data = skb->data;
total_pkt_len = skb->len;
while (total_pkt_len >= (SDIO_HEADER_OFFSET + INTF_HEADER_LEN)) {
if (total_pkt_len < adapter->sdio_rx_block_size)
break;
blk_num = *(data + BLOCK_NUMBER_OFFSET);
blk_size = adapter->sdio_rx_block_size * blk_num;
if (blk_size > total_pkt_len) {
dev_err(adapter->dev, "%s: error in pkt,\t"
"blk_num=%d, blk_size=%d, total_pkt_len=%d\n",
__func__, blk_num, blk_size, total_pkt_len);
break;
}
pkt_len = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET));
pkt_type = le16_to_cpu(*(__le16 *)(data + SDIO_HEADER_OFFSET +
2));
if ((pkt_len + SDIO_HEADER_OFFSET) > blk_size) {
dev_err(adapter->dev, "%s: error in pkt,\t"
"pkt_len=%d, blk_size=%d\n",
__func__, pkt_len, blk_size);
break;
}
skb_deaggr = mwifiex_alloc_dma_align_buf(pkt_len,
GFP_KERNEL | GFP_DMA);
if (!skb_deaggr)
break;
skb_put(skb_deaggr, pkt_len);
memcpy(skb_deaggr->data, data + SDIO_HEADER_OFFSET, pkt_len);
skb_pull(skb_deaggr, INTF_HEADER_LEN);
mwifiex_handle_rx_packet(adapter, skb_deaggr);
data += blk_size;
total_pkt_len -= blk_size;
}
}
/*
* This function decodes a received packet.
*
* Based on the type, the packet is treated as either a data, or
* a command response, or an event, and the correct handler
* function is invoked.
*/
static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
struct sk_buff *skb, u32 upld_typ)
{
u8 *cmd_buf;
__le16 *curr_ptr = (__le16 *)skb->data;
u16 pkt_len = le16_to_cpu(*curr_ptr);
struct mwifiex_rxinfo *rx_info;
if (upld_typ != MWIFIEX_TYPE_AGGR_DATA) {
skb_trim(skb, pkt_len);
skb_pull(skb, INTF_HEADER_LEN);
}
switch (upld_typ) {
case MWIFIEX_TYPE_AGGR_DATA:
dev_dbg(adapter->dev, "info: --- Rx: Aggr Data packet ---\n");
rx_info = MWIFIEX_SKB_RXCB(skb);
rx_info->buf_type = MWIFIEX_TYPE_AGGR_DATA;
if (adapter->rx_work_enabled) {
skb_queue_tail(&adapter->rx_data_q, skb);
atomic_inc(&adapter->rx_pending);
adapter->data_received = true;
} else {
mwifiex_deaggr_sdio_pkt(adapter, skb);
dev_kfree_skb_any(skb);
}
break;
case MWIFIEX_TYPE_DATA:
dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
if (adapter->rx_work_enabled) {
skb_queue_tail(&adapter->rx_data_q, skb);
adapter->data_received = true;
atomic_inc(&adapter->rx_pending);
} else {
mwifiex_handle_rx_packet(adapter, skb);
}
break;
case MWIFIEX_TYPE_CMD:
dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n");
/* take care of curr_cmd = NULL case */
if (!adapter->curr_cmd) {
cmd_buf = adapter->upld_buf;
if (adapter->ps_state == PS_STATE_SLEEP_CFM)
mwifiex_process_sleep_confirm_resp(adapter,
skb->data,
skb->len);
memcpy(cmd_buf, skb->data,
min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
skb->len));
dev_kfree_skb_any(skb);
} else {
adapter->cmd_resp_received = true;
adapter->curr_cmd->resp_skb = skb;
}
break;
case MWIFIEX_TYPE_EVENT:
dev_dbg(adapter->dev, "info: --- Rx: Event ---\n");
adapter->event_cause = le32_to_cpu(*(__le32 *) skb->data);
if ((skb->len > 0) && (skb->len < MAX_EVENT_SIZE))
memcpy(adapter->event_body,
skb->data + MWIFIEX_EVENT_HEADER_LEN,
skb->len);
/* event cause has been saved to adapter->event_cause */
adapter->event_received = true;
adapter->event_skb = skb;
break;
default:
dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ);
dev_kfree_skb_any(skb);
break;
}
return 0;
}
/*
* This function transfers received packets from card to driver, performing
* aggregation if required.
*
* For data received on control port, or if aggregation is disabled, the
* received buffers are uploaded as separate packets. However, if aggregation
* is enabled and required, the buffers are copied onto an aggregation buffer,
* provided there is space left, processed and finally uploaded.
*/
static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
u16 rx_len, u8 port)
{
struct sdio_mmc_card *card = adapter->card;
s32 f_do_rx_aggr = 0;
s32 f_do_rx_cur = 0;
s32 f_aggr_cur = 0;
s32 f_post_aggr_cur = 0;
struct sk_buff *skb_deaggr;
struct sk_buff *skb = NULL;
u32 pkt_len, pkt_type, mport, pind;
u8 *curr_ptr;
if ((card->has_control_mask) && (port == CTRL_PORT)) {
/* Read the command Resp without aggr */
dev_dbg(adapter->dev, "info: %s: no aggregation for cmd "
"response\n", __func__);
f_do_rx_cur = 1;
goto rx_curr_single;
}
if (!card->mpa_rx.enabled) {
dev_dbg(adapter->dev, "info: %s: rx aggregation disabled\n",
__func__);
f_do_rx_cur = 1;
goto rx_curr_single;
}
if ((!card->has_control_mask && (card->mp_rd_bitmap &
card->reg->data_port_mask)) ||
(card->has_control_mask && (card->mp_rd_bitmap &
(~((u32) CTRL_PORT_MASK))))) {
/* Some more data RX pending */
dev_dbg(adapter->dev, "info: %s: not last packet\n", __func__);
if (MP_RX_AGGR_IN_PROGRESS(card)) {
if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len)) {
f_aggr_cur = 1;
} else {
/* No room in Aggr buf, do rx aggr now */
f_do_rx_aggr = 1;
f_post_aggr_cur = 1;
}
} else {
/* Rx aggr not in progress */
f_aggr_cur = 1;
}
} else {
/* No more data RX pending */
dev_dbg(adapter->dev, "info: %s: last packet\n", __func__);
if (MP_RX_AGGR_IN_PROGRESS(card)) {
f_do_rx_aggr = 1;
if (MP_RX_AGGR_BUF_HAS_ROOM(card, rx_len))
f_aggr_cur = 1;
else
/* No room in Aggr buf, do rx aggr now */
f_do_rx_cur = 1;
} else {
f_do_rx_cur = 1;
}
}
if (f_aggr_cur) {
dev_dbg(adapter->dev, "info: current packet aggregation\n");
/* Curr pkt can be aggregated */
mp_rx_aggr_setup(card, rx_len, port);
if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
mp_rx_aggr_port_limit_reached(card)) {
dev_dbg(adapter->dev, "info: %s: aggregated packet "
"limit reached\n", __func__);
/* No more pkts allowed in Aggr buf, rx it */
f_do_rx_aggr = 1;
}
}
if (f_do_rx_aggr) {
/* do aggr RX now */
dev_dbg(adapter->dev, "info: do_rx_aggr: num of packets: %d\n",
card->mpa_rx.pkt_cnt);
if (card->supports_sdio_new_mode) {
int i;
u32 port_count;
for (i = 0, port_count = 0; i < card->max_ports; i++)
if (card->mpa_rx.ports & BIT(i))
port_count++;
/* Reading data from "start_port + 0" to "start_port +
* port_count -1", so decrease the count by 1
*/
port_count--;
mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
(port_count << 8)) + card->mpa_rx.start_port;
} else {
mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
(card->mpa_rx.ports << 4)) +
card->mpa_rx.start_port;
}
if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
card->mpa_rx.buf_len, mport, 1))
goto error;
curr_ptr = card->mpa_rx.buf;
for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
u32 *len_arr = card->mpa_rx.len_arr;
/* get curr PKT len & type */
pkt_len = le16_to_cpu(*(__le16 *) &curr_ptr[0]);
pkt_type = le16_to_cpu(*(__le16 *) &curr_ptr[2]);
/* copy pkt to deaggr buf */
skb_deaggr = mwifiex_alloc_dma_align_buf(len_arr[pind],
GFP_KERNEL |
GFP_DMA);
if (!skb_deaggr) {
dev_err(adapter->dev, "skb allocation failure drop pkt len=%d type=%d\n",
pkt_len, pkt_type);
curr_ptr += len_arr[pind];
continue;
}
skb_put(skb_deaggr, len_arr[pind]);
if ((pkt_type == MWIFIEX_TYPE_DATA ||
(pkt_type == MWIFIEX_TYPE_AGGR_DATA &&
adapter->sdio_rx_aggr_enable)) &&
(pkt_len <= len_arr[pind])) {
memcpy(skb_deaggr->data, curr_ptr, pkt_len);
skb_trim(skb_deaggr, pkt_len);
/* Process de-aggr packet */
mwifiex_decode_rx_packet(adapter, skb_deaggr,
pkt_type);
} else {
dev_err(adapter->dev, " drop wrong aggr pkt:\t"
"sdio_single_port_rx_aggr=%d\t"
"type=%d len=%d max_len=%d\n",
adapter->sdio_rx_aggr_enable,
pkt_type, pkt_len,
len_arr[pind]);
dev_kfree_skb_any(skb_deaggr);
}
curr_ptr += len_arr[pind];
}
MP_RX_AGGR_BUF_RESET(card);
}
rx_curr_single:
if (f_do_rx_cur) {
dev_dbg(adapter->dev, "info: RX: port: %d, rx_len: %d\n",
port, rx_len);
skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
if (!skb) {
dev_err(adapter->dev, "single skb allocated fail,\t"
"drop pkt port=%d len=%d\n", port, rx_len);
if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
card->mpa_rx.buf, rx_len,
adapter->ioport + port))
goto error;
return 0;
}
skb_put(skb, rx_len);
if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
skb->data, skb->len,
adapter->ioport + port))
goto error;
if (!adapter->sdio_rx_aggr_enable &&
pkt_type == MWIFIEX_TYPE_AGGR_DATA) {
dev_err(adapter->dev, "drop wrong pkt type %d\t"
"current SDIO RX Aggr not enabled\n",
pkt_type);
dev_kfree_skb_any(skb);
return 0;
}
mwifiex_decode_rx_packet(adapter, skb, pkt_type);
}
if (f_post_aggr_cur) {
dev_dbg(adapter->dev, "info: current packet aggregation\n");
/* Curr pkt can be aggregated */
mp_rx_aggr_setup(card, rx_len, port);
}
return 0;
error:
if (MP_RX_AGGR_IN_PROGRESS(card))
MP_RX_AGGR_BUF_RESET(card);
if (f_do_rx_cur && skb)
/* Single transfer pending. Free curr buff also */
dev_kfree_skb_any(skb);
return -1;
}
/*
* This function checks the current interrupt status.
*
* The following interrupts are checked and handled by this function -
* - Data sent
* - Command sent
* - Packets received
*
* Since the firmware does not generate download ready interrupt if the
* port updated is command port only, command sent interrupt checking
* should be done manually, and for every SDIO interrupt.
*
* In case of Rx packets received, the packets are uploaded from card to
* host and processed accordingly.
*/
static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
const struct mwifiex_sdio_card_reg *reg = card->reg;
int ret = 0;
u8 sdio_ireg;
struct sk_buff *skb;
u8 port = CTRL_PORT;
u32 len_reg_l, len_reg_u;
u32 rx_blocks;
u16 rx_len;
unsigned long flags;
u32 bitmap;
u8 cr;
spin_lock_irqsave(&adapter->int_lock, flags);
sdio_ireg = adapter->int_status;
adapter->int_status = 0;
spin_unlock_irqrestore(&adapter->int_lock, flags);
if (!sdio_ireg)
return ret;
/* Following interrupt is only for SDIO new mode */
if (sdio_ireg & DN_LD_CMD_PORT_HOST_INT_STATUS && adapter->cmd_sent)
adapter->cmd_sent = false;
/* Following interrupt is only for SDIO new mode */
if (sdio_ireg & UP_LD_CMD_PORT_HOST_INT_STATUS) {
u32 pkt_type;
/* read the len of control packet */
rx_len = card->mp_regs[reg->cmd_rd_len_1] << 8;
rx_len |= (u16)card->mp_regs[reg->cmd_rd_len_0];
rx_blocks = DIV_ROUND_UP(rx_len, MWIFIEX_SDIO_BLOCK_SIZE);
if (rx_len <= INTF_HEADER_LEN ||
(rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
MWIFIEX_RX_DATA_BUF_SIZE)
return -1;
rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
dev_dbg(adapter->dev, "info: rx_len = %d\n", rx_len);
skb = mwifiex_alloc_dma_align_buf(rx_len, GFP_KERNEL | GFP_DMA);
if (!skb)
return -1;
skb_put(skb, rx_len);
if (mwifiex_sdio_card_to_host(adapter, &pkt_type, skb->data,
skb->len, adapter->ioport |
CMD_PORT_SLCT)) {
dev_err(adapter->dev,
"%s: failed to card_to_host", __func__);
dev_kfree_skb_any(skb);
goto term_cmd;
}
if ((pkt_type != MWIFIEX_TYPE_CMD) &&
(pkt_type != MWIFIEX_TYPE_EVENT))
dev_err(adapter->dev,
"%s:Received wrong packet on cmd port",
__func__);
mwifiex_decode_rx_packet(adapter, skb, pkt_type);
}
if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
bitmap = (u32) card->mp_regs[reg->wr_bitmap_l];
bitmap |= ((u32) card->mp_regs[reg->wr_bitmap_u]) << 8;
if (card->supports_sdio_new_mode) {
bitmap |=
((u32) card->mp_regs[reg->wr_bitmap_1l]) << 16;
bitmap |=
((u32) card->mp_regs[reg->wr_bitmap_1u]) << 24;
}
card->mp_wr_bitmap = bitmap;
dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%x\n",
card->mp_wr_bitmap);
if (adapter->data_sent &&
(card->mp_wr_bitmap & card->mp_data_port_mask)) {
dev_dbg(adapter->dev,
"info: <--- Tx DONE Interrupt --->\n");
adapter->data_sent = false;
}
}
/* As firmware will not generate download ready interrupt if the port
updated is command port only, cmd_sent should be done for any SDIO
interrupt. */
if (card->has_control_mask && adapter->cmd_sent) {
/* Check if firmware has attach buffer at command port and
update just that in wr_bit_map. */
card->mp_wr_bitmap |=
(u32) card->mp_regs[reg->wr_bitmap_l] & CTRL_PORT_MASK;
if (card->mp_wr_bitmap & CTRL_PORT_MASK)
adapter->cmd_sent = false;
}
dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
adapter->cmd_sent, adapter->data_sent);
if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
bitmap = (u32) card->mp_regs[reg->rd_bitmap_l];
bitmap |= ((u32) card->mp_regs[reg->rd_bitmap_u]) << 8;
if (card->supports_sdio_new_mode) {
bitmap |=
((u32) card->mp_regs[reg->rd_bitmap_1l]) << 16;
bitmap |=
((u32) card->mp_regs[reg->rd_bitmap_1u]) << 24;
}
card->mp_rd_bitmap = bitmap;
dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%x\n",
card->mp_rd_bitmap);
while (true) {
ret = mwifiex_get_rd_port(adapter, &port);
if (ret) {
dev_dbg(adapter->dev,
"info: no more rd_port available\n");
break;
}
len_reg_l = reg->rd_len_p0_l + (port << 1);
len_reg_u = reg->rd_len_p0_u + (port << 1);
rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
rx_len |= (u16) card->mp_regs[len_reg_l];
dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n",
port, rx_len);
rx_blocks =
(rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1) / MWIFIEX_SDIO_BLOCK_SIZE;
if (rx_len <= INTF_HEADER_LEN ||
(rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
card->mpa_rx.buf_size) {
dev_err(adapter->dev, "invalid rx_len=%d\n",
rx_len);
return -1;
}
rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
dev_dbg(adapter->dev, "info: rx_len = %d\n", rx_len);
if (mwifiex_sdio_card_to_host_mp_aggr(adapter, rx_len,
port)) {
dev_err(adapter->dev, "card_to_host_mpa failed:"
" int status=%#x\n", sdio_ireg);
goto term_cmd;
}
}
}
return 0;
term_cmd:
/* terminate cmd */
if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
dev_err(adapter->dev, "read CFG reg failed\n");
else
dev_dbg(adapter->dev, "info: CFG reg val = %d\n", cr);
if (mwifiex_write_reg(adapter, CONFIGURATION_REG, (cr | 0x04)))
dev_err(adapter->dev, "write CFG reg failed\n");
else
dev_dbg(adapter->dev, "info: write success\n");
if (mwifiex_read_reg(adapter, CONFIGURATION_REG, &cr))
dev_err(adapter->dev, "read CFG reg failed\n");
else
dev_dbg(adapter->dev, "info: CFG reg val =%x\n", cr);
return -1;
}
/*
* This function aggregates transmission buffers in driver and downloads
* the aggregated packet to card.
*
* The individual packets are aggregated by copying into an aggregation
* buffer and then downloaded to the card. Previous unsent packets in the
* aggregation buffer are pre-copied first before new packets are added.
* Aggregation is done till there is space left in the aggregation buffer,
* or till new packets are available.
*
* The function will only download the packet to the card when aggregation
* stops, otherwise it will just aggregate the packet in aggregation buffer
* and return.
*/
static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
u8 *payload, u32 pkt_len, u32 port,
u32 next_pkt_len)
{
struct sdio_mmc_card *card = adapter->card;
int ret = 0;
s32 f_send_aggr_buf = 0;
s32 f_send_cur_buf = 0;
s32 f_precopy_cur_buf = 0;
s32 f_postcopy_cur_buf = 0;
u32 mport;
if (!card->mpa_tx.enabled ||
(card->has_control_mask && (port == CTRL_PORT)) ||
(card->supports_sdio_new_mode && (port == CMD_PORT_SLCT))) {
dev_dbg(adapter->dev, "info: %s: tx aggregation disabled\n",
__func__);
f_send_cur_buf = 1;
goto tx_curr_single;
}
if (next_pkt_len) {
/* More pkt in TX queue */
dev_dbg(adapter->dev, "info: %s: more packets in queue.\n",
__func__);
if (MP_TX_AGGR_IN_PROGRESS(card)) {
if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
f_precopy_cur_buf = 1;
if (!(card->mp_wr_bitmap &
(1 << card->curr_wr_port)) ||
!MP_TX_AGGR_BUF_HAS_ROOM(
card, pkt_len + next_pkt_len))
f_send_aggr_buf = 1;
} else {
/* No room in Aggr buf, send it */
f_send_aggr_buf = 1;
if (!(card->mp_wr_bitmap &
(1 << card->curr_wr_port)))
f_send_cur_buf = 1;
else
f_postcopy_cur_buf = 1;
}
} else {
if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
f_precopy_cur_buf = 1;
else
f_send_cur_buf = 1;
}
} else {
/* Last pkt in TX queue */
dev_dbg(adapter->dev, "info: %s: Last packet in Tx Queue.\n",
__func__);
if (MP_TX_AGGR_IN_PROGRESS(card)) {
/* some packs in Aggr buf already */
f_send_aggr_buf = 1;
if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
f_precopy_cur_buf = 1;
else
/* No room in Aggr buf, send it */
f_send_cur_buf = 1;
} else {
f_send_cur_buf = 1;
}
}
if (f_precopy_cur_buf) {
dev_dbg(adapter->dev, "data: %s: precopy current buffer\n",
__func__);
MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
mp_tx_aggr_port_limit_reached(card))
/* No more pkts allowed in Aggr buf, send it */
f_send_aggr_buf = 1;
}
if (f_send_aggr_buf) {
dev_dbg(adapter->dev, "data: %s: send aggr buffer: %d %d\n",
__func__,
card->mpa_tx.start_port, card->mpa_tx.ports);
if (card->supports_sdio_new_mode) {
u32 port_count;
int i;
for (i = 0, port_count = 0; i < card->max_ports; i++)
if (card->mpa_tx.ports & BIT(i))
port_count++;
/* Writing data from "start_port + 0" to "start_port +
* port_count -1", so decrease the count by 1
*/
port_count--;
mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
(port_count << 8)) + card->mpa_tx.start_port;
} else {
mport = (adapter->ioport | SDIO_MPA_ADDR_BASE |
(card->mpa_tx.ports << 4)) +
card->mpa_tx.start_port;
}
ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
card->mpa_tx.buf_len, mport);
MP_TX_AGGR_BUF_RESET(card);
}
tx_curr_single:
if (f_send_cur_buf) {
dev_dbg(adapter->dev, "data: %s: send current buffer %d\n",
__func__, port);
ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
adapter->ioport + port);
}
if (f_postcopy_cur_buf) {
dev_dbg(adapter->dev, "data: %s: postcopy current buffer\n",
__func__);
MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
}
return ret;
}
/*
* This function downloads data from driver to card.
*
* Both commands and data packets are transferred to the card by this
* function.
*
* This function adds the SDIO specific header to the front of the buffer
* before transferring. The header contains the length of the packet and
* the type. The firmware handles the packets based upon this set type.
*/
static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
u8 type, struct sk_buff *skb,
struct mwifiex_tx_param *tx_param)
{
struct sdio_mmc_card *card = adapter->card;
int ret;
u32 buf_block_len;
u32 blk_size;
u32 port = CTRL_PORT;
u8 *payload = (u8 *)skb->data;
u32 pkt_len = skb->len;
/* Allocate buffer and copy payload */
blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
buf_block_len = (pkt_len + blk_size - 1) / blk_size;
*(__le16 *)&payload[0] = cpu_to_le16((u16)pkt_len);
*(__le16 *)&payload[2] = cpu_to_le16(type);
/*
* This is SDIO specific header
* u16 length,
* u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
* MWIFIEX_TYPE_EVENT = 3)
*/
if (type == MWIFIEX_TYPE_DATA) {
ret = mwifiex_get_wr_port_data(adapter, &port);
if (ret) {
dev_err(adapter->dev, "%s: no wr_port available\n",
__func__);
return ret;
}
} else {
adapter->cmd_sent = true;
/* Type must be MWIFIEX_TYPE_CMD */
if (pkt_len <= INTF_HEADER_LEN ||
pkt_len > MWIFIEX_UPLD_SIZE)
dev_err(adapter->dev, "%s: payload=%p, nb=%d\n",
__func__, payload, pkt_len);
if (card->supports_sdio_new_mode)
port = CMD_PORT_SLCT;
}
/* Transfer data to card */
pkt_len = buf_block_len * blk_size;
if (tx_param)
ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
port, tx_param->next_pkt_len
);
else
ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
port, 0);
if (ret) {
if (type == MWIFIEX_TYPE_CMD)
adapter->cmd_sent = false;
if (type == MWIFIEX_TYPE_DATA) {
adapter->data_sent = false;
/* restore curr_wr_port in error cases */
card->curr_wr_port = port;
card->mp_wr_bitmap |= (u32)(1 << card->curr_wr_port);
}
} else {
if (type == MWIFIEX_TYPE_DATA) {
if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
adapter->data_sent = true;
else
adapter->data_sent = false;
}
}
return ret;
}
/*
* This function allocates the MPA Tx and Rx buffers.
*/
static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
{
struct sdio_mmc_card *card = adapter->card;
u32 rx_buf_size;
int ret = 0;
card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
if (!card->mpa_tx.buf) {
ret = -1;
goto error;
}
card->mpa_tx.buf_size = mpa_tx_buf_size;
rx_buf_size = max_t(u32, mpa_rx_buf_size,
(u32)SDIO_MAX_AGGR_BUF_SIZE);
card->mpa_rx.buf = kzalloc(rx_buf_size, GFP_KERNEL);
if (!card->mpa_rx.buf) {
ret = -1;
goto error;
}
card->mpa_rx.buf_size = rx_buf_size;
error:
if (ret) {
kfree(card->mpa_tx.buf);
kfree(card->mpa_rx.buf);
}
return ret;
}
/*
* This function unregisters the SDIO device.
*
* The SDIO IRQ is released, the function is disabled and driver
* data is set to null.
*/
static void
mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
if (adapter->card) {
sdio_claim_host(card->func);
sdio_disable_func(card->func);
sdio_release_host(card->func);
}
}
/*
* This function registers the SDIO device.
*
* SDIO IRQ is claimed, block size is set and driver data is initialized.
*/
static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
{
int ret;
struct sdio_mmc_card *card = adapter->card;
struct sdio_func *func = card->func;
/* save adapter pointer in card */
card->adapter = adapter;
adapter->tx_buf_size = card->tx_buf_size;
sdio_claim_host(func);
/* Set block size */
ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
sdio_release_host(func);
if (ret) {
pr_err("cannot set SDIO block size\n");
return ret;
}
adapter->dev = &func->dev;
strcpy(adapter->fw_name, card->firmware);
adapter->mem_type_mapping_tbl = mem_type_mapping_tbl;
adapter->num_mem_types = ARRAY_SIZE(mem_type_mapping_tbl);
return 0;
}
/*
* This function initializes the SDIO driver.
*
* The following initializations steps are followed -
* - Read the Host interrupt status register to acknowledge
* the first interrupt got from bootloader
* - Disable host interrupt mask register
* - Get SDIO port
* - Initialize SDIO variables in card
* - Allocate MP registers
* - Allocate MPA Tx and Rx buffers
*/
static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
const struct mwifiex_sdio_card_reg *reg = card->reg;
int ret;
u8 sdio_ireg;
sdio_set_drvdata(card->func, card);
/*
* Read the host_int_status_reg for ACK the first interrupt got
* from the bootloader. If we don't do this we get a interrupt
* as soon as we register the irq.
*/
mwifiex_read_reg(adapter, card->reg->host_int_status_reg, &sdio_ireg);
/* Get SDIO ioport */
mwifiex_init_sdio_ioport(adapter);
/* Initialize SDIO variables in card */
card->mp_rd_bitmap = 0;
card->mp_wr_bitmap = 0;
card->curr_rd_port = reg->start_rd_port;
card->curr_wr_port = reg->start_wr_port;
card->mp_data_port_mask = reg->data_port_mask;
card->mpa_tx.buf_len = 0;
card->mpa_tx.pkt_cnt = 0;
card->mpa_tx.start_port = 0;
card->mpa_tx.enabled = 1;
card->mpa_tx.pkt_aggr_limit = card->mp_agg_pkt_limit;
card->mpa_rx.buf_len = 0;
card->mpa_rx.pkt_cnt = 0;
card->mpa_rx.start_port = 0;
card->mpa_rx.enabled = 1;
card->mpa_rx.pkt_aggr_limit = card->mp_agg_pkt_limit;
/* Allocate buffers for SDIO MP-A */
card->mp_regs = kzalloc(reg->max_mp_regs, GFP_KERNEL);
if (!card->mp_regs)
return -ENOMEM;
/* Allocate skb pointer buffers */
card->mpa_rx.skb_arr = kzalloc((sizeof(void *)) *
card->mp_agg_pkt_limit, GFP_KERNEL);
card->mpa_rx.len_arr = kzalloc(sizeof(*card->mpa_rx.len_arr) *
card->mp_agg_pkt_limit, GFP_KERNEL);
ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
card->mp_tx_agg_buf_size,
card->mp_rx_agg_buf_size);
if (ret) {
dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
kfree(card->mp_regs);
return -1;
}
adapter->auto_tdls = card->can_auto_tdls;
adapter->ext_scan = card->can_ext_scan;
return ret;
}
/*
* This function resets the MPA Tx and Rx buffers.
*/
static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
MP_TX_AGGR_BUF_RESET(card);
MP_RX_AGGR_BUF_RESET(card);
}
/*
* This function cleans up the allocated card buffers.
*
* The following are freed by this function -
* - MP registers
* - MPA Tx buffer
* - MPA Rx buffer
*/
static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
kfree(card->mp_regs);
kfree(card->mpa_rx.skb_arr);
kfree(card->mpa_rx.len_arr);
kfree(card->mpa_tx.buf);
kfree(card->mpa_rx.buf);
sdio_set_drvdata(card->func, NULL);
kfree(card);
}
/*
* This function updates the MP end port in card.
*/
static void
mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
{
struct sdio_mmc_card *card = adapter->card;
const struct mwifiex_sdio_card_reg *reg = card->reg;
int i;
card->mp_end_port = port;
card->mp_data_port_mask = reg->data_port_mask;
if (reg->start_wr_port) {
for (i = 1; i <= card->max_ports - card->mp_end_port; i++)
card->mp_data_port_mask &=
~(1 << (card->max_ports - i));
}
card->curr_wr_port = reg->start_wr_port;
dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n",
port, card->mp_data_port_mask);
}
static struct mwifiex_adapter *save_adapter;
static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
struct mmc_host *target = card->func->card->host;
/* The actual reset operation must be run outside of driver thread.
* This is because mmc_remove_host() will cause the device to be
* instantly destroyed, and the driver then needs to end its thread,
* leading to a deadlock.
*
* We run it in a totally independent workqueue.
*/
pr_err("Resetting card...\n");
mmc_remove_host(target);
/* 200ms delay is based on experiment with sdhci controller */
mdelay(200);
target->rescan_entered = 0; /* rescan non-removable cards */
mmc_add_host(target);
}
/* This function read/write firmware */
static enum
rdwr_status mwifiex_sdio_rdwr_firmware(struct mwifiex_adapter *adapter,
u8 doneflag)
{
struct sdio_mmc_card *card = adapter->card;
int ret, tries;
u8 ctrl_data = 0;
sdio_writeb(card->func, FW_DUMP_HOST_READY, card->reg->fw_dump_ctrl,
&ret);
if (ret) {
dev_err(adapter->dev, "SDIO Write ERR\n");
return RDWR_STATUS_FAILURE;
}
for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
ctrl_data = sdio_readb(card->func, card->reg->fw_dump_ctrl,
&ret);
if (ret) {
dev_err(adapter->dev, "SDIO read err\n");
return RDWR_STATUS_FAILURE;
}
if (ctrl_data == FW_DUMP_DONE)
break;
if (doneflag && ctrl_data == doneflag)
return RDWR_STATUS_DONE;
if (ctrl_data != FW_DUMP_HOST_READY) {
dev_info(adapter->dev,
"The ctrl reg was changed, re-try again!\n");
sdio_writeb(card->func, FW_DUMP_HOST_READY,
card->reg->fw_dump_ctrl, &ret);
if (ret) {
dev_err(adapter->dev, "SDIO write err\n");
return RDWR_STATUS_FAILURE;
}
}
usleep_range(100, 200);
}
if (ctrl_data == FW_DUMP_HOST_READY) {
dev_err(adapter->dev, "Fail to pull ctrl_data\n");
return RDWR_STATUS_FAILURE;
}
return RDWR_STATUS_SUCCESS;
}
/* This function dump firmware memory to file */
static void mwifiex_sdio_fw_dump_work(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
int ret = 0;
unsigned int reg, reg_start, reg_end;
u8 *dbg_ptr, *end_ptr, dump_num, idx, i, read_reg, doneflag = 0;
enum rdwr_status stat;
u32 memory_size;
static char *env[] = { "DRIVER=mwifiex_sdio", "EVENT=fw_dump", NULL };
mwifiex_dump_drv_info(adapter);
if (!card->can_dump_fw)
return;
for (idx = 0; idx < ARRAY_SIZE(mem_type_mapping_tbl); idx++) {
struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
if (entry->mem_ptr) {
vfree(entry->mem_ptr);
entry->mem_ptr = NULL;
}
entry->mem_size = 0;
}
mwifiex_pm_wakeup_card(adapter);
sdio_claim_host(card->func);
dev_info(adapter->dev, "== mwifiex firmware dump start ==\n");
stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
if (stat == RDWR_STATUS_FAILURE)
goto done;
reg = card->reg->fw_dump_start;
/* Read the number of the memories which will dump */
dump_num = sdio_readb(card->func, reg, &ret);
if (ret) {
dev_err(adapter->dev, "SDIO read memory length err\n");
goto done;
}
/* Read the length of every memory which will dump */
for (idx = 0; idx < dump_num; idx++) {
struct memory_type_mapping *entry = &mem_type_mapping_tbl[idx];
stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
if (stat == RDWR_STATUS_FAILURE)
goto done;
memory_size = 0;
reg = card->reg->fw_dump_start;
for (i = 0; i < 4; i++) {
read_reg = sdio_readb(card->func, reg, &ret);
if (ret) {
dev_err(adapter->dev, "SDIO read err\n");
goto done;
}
memory_size |= (read_reg << i*8);
reg++;
}
if (memory_size == 0) {
dev_info(adapter->dev, "Firmware dump Finished!\n");
break;
}
dev_info(adapter->dev,
"%s_SIZE=0x%x\n", entry->mem_name, memory_size);
entry->mem_ptr = vmalloc(memory_size + 1);
entry->mem_size = memory_size;
if (!entry->mem_ptr) {
dev_err(adapter->dev, "Vmalloc %s failed\n",
entry->mem_name);
goto done;
}
dbg_ptr = entry->mem_ptr;
end_ptr = dbg_ptr + memory_size;
doneflag = entry->done_flag;
dev_info(adapter->dev, "Start %s output, please wait...\n",
entry->mem_name);
do {
stat = mwifiex_sdio_rdwr_firmware(adapter, doneflag);
if (stat == RDWR_STATUS_FAILURE)
goto done;
reg_start = card->reg->fw_dump_start;
reg_end = card->reg->fw_dump_end;
for (reg = reg_start; reg <= reg_end; reg++) {
*dbg_ptr = sdio_readb(card->func, reg, &ret);
if (ret) {
dev_err(adapter->dev,
"SDIO read err\n");
goto done;
}
if (dbg_ptr < end_ptr)
dbg_ptr++;
else
dev_err(adapter->dev,
"Allocated buf not enough\n");
}
if (stat != RDWR_STATUS_DONE)
continue;
dev_info(adapter->dev, "%s done: size=0x%tx\n",
entry->mem_name, dbg_ptr - entry->mem_ptr);
break;
} while (1);
}
dev_info(adapter->dev, "== mwifiex firmware dump end ==\n");
kobject_uevent_env(&adapter->wiphy->dev.kobj, KOBJ_CHANGE, env);
done:
sdio_release_host(card->func);
adapter->curr_mem_idx = 0;
}
static void mwifiex_sdio_work(struct work_struct *work)
{
if (test_and_clear_bit(MWIFIEX_IFACE_WORK_FW_DUMP,
&iface_work_flags))
mwifiex_sdio_fw_dump_work(save_adapter);
if (test_and_clear_bit(MWIFIEX_IFACE_WORK_CARD_RESET,
&iface_work_flags))
mwifiex_sdio_card_reset_work(save_adapter);
}
static DECLARE_WORK(sdio_work, mwifiex_sdio_work);
/* This function resets the card */
static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
{
save_adapter = adapter;
if (test_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags))
return;
set_bit(MWIFIEX_IFACE_WORK_CARD_RESET, &iface_work_flags);
schedule_work(&sdio_work);
}
/* This function dumps FW information */
static void mwifiex_sdio_fw_dump(struct mwifiex_adapter *adapter)
{
save_adapter = adapter;
if (test_bit(MWIFIEX_IFACE_WORK_FW_DUMP, &iface_work_flags))
return;
set_bit(MWIFIEX_IFACE_WORK_FW_DUMP, &iface_work_flags);
schedule_work(&sdio_work);
}
/* Function to dump SDIO function registers and SDIO scratch registers in case
* of FW crash
*/
static int
mwifiex_sdio_reg_dump(struct mwifiex_adapter *adapter, char *drv_buf)
{
char *p = drv_buf;
struct sdio_mmc_card *cardp = adapter->card;
int ret = 0;
u8 count, func, data, index = 0, size = 0;
u8 reg, reg_start, reg_end;
char buf[256], *ptr;
if (!p)
return 0;
dev_info(adapter->dev, "SDIO register DUMP START\n");
mwifiex_pm_wakeup_card(adapter);
sdio_claim_host(cardp->func);
for (count = 0; count < 5; count++) {
memset(buf, 0, sizeof(buf));
ptr = buf;
switch (count) {
case 0:
/* Read the registers of SDIO function0 */
func = count;
reg_start = 0;
reg_end = 9;
break;
case 1:
/* Read the registers of SDIO function1 */
func = count;
reg_start = cardp->reg->func1_dump_reg_start;
reg_end = cardp->reg->func1_dump_reg_end;
break;
case 2:
index = 0;
func = 1;
reg_start = cardp->reg->func1_spec_reg_table[index++];
size = cardp->reg->func1_spec_reg_num;
reg_end = cardp->reg->func1_spec_reg_table[size-1];
break;
default:
/* Read the scratch registers of SDIO function1 */
if (count == 4)
mdelay(100);
func = 1;
reg_start = cardp->reg->func1_scratch_reg;
reg_end = reg_start + MWIFIEX_SDIO_SCRATCH_SIZE;
}
if (count != 2)
ptr += sprintf(ptr, "SDIO Func%d (%#x-%#x): ",
func, reg_start, reg_end);
else
ptr += sprintf(ptr, "SDIO Func%d: ", func);
for (reg = reg_start; reg <= reg_end;) {
if (func == 0)
data = sdio_f0_readb(cardp->func, reg, &ret);
else
data = sdio_readb(cardp->func, reg, &ret);
if (count == 2)
ptr += sprintf(ptr, "(%#x) ", reg);
if (!ret) {
ptr += sprintf(ptr, "%02x ", data);
} else {
ptr += sprintf(ptr, "ERR");
break;
}
if (count == 2 && reg < reg_end)
reg = cardp->reg->func1_spec_reg_table[index++];
else
reg++;
}
dev_info(adapter->dev, "%s\n", buf);
p += sprintf(p, "%s\n", buf);
}
sdio_release_host(cardp->func);
dev_info(adapter->dev, "SDIO register DUMP END\n");
return p - drv_buf;
}
static struct mwifiex_if_ops sdio_ops = {
.init_if = mwifiex_init_sdio,
.cleanup_if = mwifiex_cleanup_sdio,
.check_fw_status = mwifiex_check_fw_status,
.prog_fw = mwifiex_prog_fw_w_helper,
.register_dev = mwifiex_register_dev,
.unregister_dev = mwifiex_unregister_dev,
.enable_int = mwifiex_sdio_enable_host_int,
.disable_int = mwifiex_sdio_disable_host_int,
.process_int_status = mwifiex_process_int_status,
.host_to_card = mwifiex_sdio_host_to_card,
.wakeup = mwifiex_pm_wakeup_card,
.wakeup_complete = mwifiex_pm_wakeup_card_complete,
/* SDIO specific */
.update_mp_end_port = mwifiex_update_mp_end_port,
.cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
.cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
.event_complete = mwifiex_sdio_event_complete,
.card_reset = mwifiex_sdio_card_reset,
.fw_dump = mwifiex_sdio_fw_dump,
.reg_dump = mwifiex_sdio_reg_dump,
.deaggr_pkt = mwifiex_deaggr_sdio_pkt,
};
/*
* This function initializes the SDIO driver.
*
* This initiates the semaphore and registers the device with
* SDIO bus.
*/
static int
mwifiex_sdio_init_module(void)
{
sema_init(&add_remove_card_sem, 1);
/* Clear the flag in case user removes the card. */
user_rmmod = 0;
return sdio_register_driver(&mwifiex_sdio);
}
/*
* This function cleans up the SDIO driver.
*
* The following major steps are followed for cleanup -
* - Resume the device if its suspended
* - Disconnect the device if connected
* - Shutdown the firmware
* - Unregister the device from SDIO bus.
*/
static void
mwifiex_sdio_cleanup_module(void)
{
if (!down_interruptible(&add_remove_card_sem))
up(&add_remove_card_sem);
/* Set the flag as user is removing this module. */
user_rmmod = 1;
cancel_work_sync(&sdio_work);
sdio_unregister_driver(&mwifiex_sdio);
}
module_init(mwifiex_sdio_init_module);
module_exit(mwifiex_sdio_cleanup_module);
MODULE_AUTHOR("Marvell International Ltd.");
MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
MODULE_VERSION(SDIO_VERSION);
MODULE_LICENSE("GPL v2");
MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);
MODULE_FIRMWARE(SD8897_DEFAULT_FW_NAME);
MODULE_FIRMWARE(SD8887_DEFAULT_FW_NAME);
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