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linux/drivers/net/wireless/mwifiex/sdio.c

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/*
* Marvell Wireless LAN device driver: SDIO specific handling
*
* Copyright (C) 2011, 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 struct semaphore add_remove_card_sem;
/*
* 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;
}
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)
/* 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},
{},
};
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;
adapter->ioport = MEM_PORT;
/* enable sdio new mode */
if (mwifiex_read_reg(adapter, CARD_CONFIG_2_1_REG, &reg))
return -1;
if (mwifiex_write_reg(adapter, CARD_CONFIG_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, CMD_CONFIG_0, &reg))
return -1;
if (mwifiex_write_reg(adapter, CMD_CONFIG_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, CMD_CONFIG_1, &reg))
return -1;
if (mwifiex_write_reg(adapter, CMD_CONFIG_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, IO_PORT_0_REG, &reg))
adapter->ioport |= (reg & 0xff);
else
return -1;
if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, &reg))
adapter->ioport |= ((reg & 0xff) << 8);
else
return -1;
if (!mwifiex_read_reg(adapter, 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, HOST_INT_RSR_REG, &reg))
mwifiex_write_reg(adapter, 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 (card->supports_sdio_new_mode &&
!(wr_bitmap & reg->data_port_mask)) {
adapter->data_sent = true;
return -EBUSY;
} else if (!card->supports_sdio_new_mode &&
!(wr_bitmap & card->mp_data_port_mask)) {
return -1;
}
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->supports_sdio_new_mode) &&
(++card->curr_wr_port == card->max_ports)) ||
((!card->supports_sdio_new_mode) &&
(++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, 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[HOST_INTSTATUS_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, 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_dbg(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 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);
skb_trim(skb, pkt_len);
skb_pull(skb, INTF_HEADER_LEN);
switch (upld_typ) {
case MWIFIEX_TYPE_DATA:
dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
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,
struct sk_buff *skb, 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;
struct sk_buff *skb_deaggr;
u32 pind;
u32 pkt_len, pkt_type, mport;
u8 *curr_ptr;
u32 rx_len = skb->len;
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, skb->len)) {
f_aggr_cur = 1;
} else {
/* No room in Aggr buf, do rx aggr now */
f_do_rx_aggr = 1;
f_do_rx_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, skb->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, skb, 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++) {
/* 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 = card->mpa_rx.skb_arr[pind];
if ((pkt_type == MWIFIEX_TYPE_DATA) && (pkt_len <=
card->mpa_rx.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, "wrong aggr pkt:"
" type=%d len=%d max_len=%d\n",
pkt_type, pkt_len,
card->mpa_rx.len_arr[pind]);
dev_kfree_skb_any(skb_deaggr);
}
curr_ptr += card->mpa_rx.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);
if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
skb->data, skb->len,
adapter->ioport + port))
goto error;
mwifiex_decode_rx_packet(adapter, skb, pkt_type);
}
return 0;
error:
if (MP_RX_AGGR_IN_PROGRESS(card)) {
/* Multiport-aggregation transfer failed - cleanup */
for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
/* copy pkt to deaggr buf */
skb_deaggr = card->mpa_rx.skb_arr[pind];
dev_kfree_skb_any(skb_deaggr);
}
MP_RX_AGGR_BUF_RESET(card);
}
if (f_do_rx_cur)
/* 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[CMD_RD_LEN_1] << 8;
rx_len |= (u16) card->mp_regs[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);
skb = dev_alloc_skb(rx_len);
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) >
MWIFIEX_RX_DATA_BUF_SIZE) {
dev_err(adapter->dev, "invalid rx_len=%d\n",
rx_len);
return -1;
}
rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
skb = dev_alloc_skb(rx_len);
if (!skb) {
dev_err(adapter->dev, "%s: failed to alloc skb",
__func__);
return -1;
}
skb_put(skb, rx_len);
dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n",
rx_len, skb->len);
if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb,
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_port_limit_reached(card) &&
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 (mp_tx_aggr_port_limit_reached(card) ||
!(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;
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;
card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL);
if (!card->mpa_rx.buf) {
ret = -1;
goto error;
}
card->mpa_rx.buf_size = mpa_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);
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, HOST_INTSTATUS_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;
}
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 mmc_host *reset_host;
static void sdio_card_reset_worker(struct work_struct *work)
{
struct mmc_host *target = reset_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);
/* 20ms delay is based on experiment with sdhci controller */
mdelay(20);
mmc_add_host(target);
}
static DECLARE_WORK(card_reset_work, sdio_card_reset_worker);
/* This function resets the card */
static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
{
struct sdio_mmc_card *card = adapter->card;
reset_host = card->func->card->host;
schedule_work(&card_reset_work);
}
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,
};
/*
* 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(&card_reset_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);
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