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path: root/drivers/net/wireless/mwifiex/sdio.c
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Diffstat (limited to 'drivers/net/wireless/mwifiex/sdio.c')
-rw-r--r--drivers/net/wireless/mwifiex/sdio.c1754
1 files changed, 1754 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/sdio.c b/drivers/net/wireless/mwifiex/sdio.c
new file mode 100644
index 0000000..d425dbd
--- /dev/null
+++ b/drivers/net/wireless/mwifiex/sdio.c
@@ -0,0 +1,1754 @@
+/*
+ * 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"
+
+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) {
+ pr_err("%s: failed to alloc memory\n", __func__);
+ return -ENOMEM;
+ }
+
+ card->func = func;
+
+ func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
+
+ 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)) {
+ 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 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;
+
+ pr_debug("info: SDIO func num=%d\n", func->num);
+
+ if (func) {
+ card = sdio_get_drvdata(func);
+ if (card) {
+ mwifiex_remove_card(card->adapter,
+ &add_remove_card_sem);
+ kfree(card);
+ }
+ }
+}
+
+/*
+ * 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 hs_actived = 0;
+ int i;
+ 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 */
+ hs_actived = mwifiex_enable_hs(adapter);
+ if (hs_actived) {
+ pr_debug("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;
+
+ for (i = 0; i < adapter->priv_num; i++)
+ netif_carrier_off(adapter->priv[i]->netdev);
+
+ 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;
+ int i;
+
+ 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;
+
+ for (i = 0; i < adapter->priv_num; i++)
+ if (adapter->priv[i]->media_connected)
+ netif_carrier_on(adapter->priv[i]->netdev);
+
+ /* Disable Host Sleep */
+ mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
+ MWIFIEX_ASYNC_CMD);
+
+ return 0;
+}
+
+/* Device ID for SD8787 */
+#define SDIO_DEVICE_ID_MARVELL_8787 (0x9119)
+
+/* WLAN IDs */
+static const struct sdio_device_id mwifiex_ids[] = {
+ {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787)},
+ {},
+};
+
+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,
+ }
+};
+
+/*
+ * This function writes data into SDIO card register.
+ */
+static int
+mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u32 data)
+{
+ struct sdio_mmc_card *card = adapter->card;
+ int ret = -1;
+
+ sdio_claim_host(card->func);
+ sdio_writeb(card->func, (u8) data, reg, &ret);
+ 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, u32 *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 = -1;
+ 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);
+
+ if (!sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size))
+ ret = 0;
+
+ 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 = -1;
+ 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);
+
+ if (!sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size))
+ ret = 0;
+
+ 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 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)
+{
+ u32 reg;
+
+ adapter->ioport = 0;
+
+ /* 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;
+
+ 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 | SDIO_INT_MASK);
+ else
+ return -1;
+
+ /* Dnld/Upld ready set to auto reset */
+ if (!mwifiex_read_reg(adapter, CARD_MISC_CFG_REG, &reg))
+ mwifiex_write_reg(adapter, 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;
+ u16 rd_bitmap = card->mp_rd_bitmap;
+
+ dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%04x\n", rd_bitmap);
+
+ if (!(rd_bitmap & (CTRL_PORT_MASK | DATA_PORT_MASK)))
+ return -1;
+
+ if (card->mp_rd_bitmap & CTRL_PORT_MASK) {
+ card->mp_rd_bitmap &= (u16) (~CTRL_PORT_MASK);
+ *port = CTRL_PORT;
+ dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%04x\n",
+ *port, card->mp_rd_bitmap);
+ } else {
+ if (card->mp_rd_bitmap & (1 << card->curr_rd_port)) {
+ card->mp_rd_bitmap &=
+ (u16) (~(1 << card->curr_rd_port));
+ *port = card->curr_rd_port;
+
+ if (++card->curr_rd_port == MAX_PORT)
+ card->curr_rd_port = 1;
+ } else {
+ return -1;
+ }
+
+ dev_dbg(adapter->dev,
+ "data: port=%d mp_rd_bitmap=0x%04x -> 0x%04x\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, u8 *port)
+{
+ struct sdio_mmc_card *card = adapter->card;
+ u16 wr_bitmap = card->mp_wr_bitmap;
+
+ dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%04x\n", wr_bitmap);
+
+ if (!(wr_bitmap & card->mp_data_port_mask))
+ return -1;
+
+ if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
+ card->mp_wr_bitmap &= (u16) (~(1 << card->curr_wr_port));
+ *port = card->curr_wr_port;
+ if (++card->curr_wr_port == card->mp_end_port)
+ card->curr_wr_port = 1;
+ } else {
+ adapter->data_sent = true;
+ return -EBUSY;
+ }
+
+ if (*port == CTRL_PORT) {
+ dev_err(adapter->dev, "invalid data port=%d cur port=%d"
+ " mp_wr_bitmap=0x%04x -> 0x%04x\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%04x -> 0x%04x\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)
+{
+ u32 tries;
+ u32 cs;
+
+ for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
+ if (mwifiex_read_reg(adapter, CARD_STATUS_REG, &cs))
+ break;
+ else if ((cs & bits) == bits)
+ return 0;
+
+ udelay(10);
+ }
+
+ 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)
+{
+ u32 fws0, fws1;
+
+ if (mwifiex_read_reg(adapter, CARD_FW_STATUS0_REG, &fws0))
+ return -1;
+
+ if (mwifiex_read_reg(adapter, CARD_FW_STATUS1_REG, &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 int mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
+{
+ u32 host_int_mask;
+
+ /* Read back the host_int_mask register */
+ if (mwifiex_read_reg(adapter, HOST_INT_MASK_REG, &host_int_mask))
+ return -1;
+
+ /* Update with the mask and write back to the register */
+ host_int_mask &= ~HOST_INT_DISABLE;
+
+ if (mwifiex_write_reg(adapter, HOST_INT_MASK_REG, host_int_mask)) {
+ dev_err(adapter->dev, "disable host interrupt failed\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * 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)
+{
+ /* Simply write the mask to the register */
+ if (mwifiex_write_reg(adapter, HOST_INT_MASK_REG, HOST_INT_ENABLE)) {
+ dev_err(adapter->dev, "enable host interrupt failed\n");
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * 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)
+{
+ int ret;
+ u8 *firmware = fw->fw_buf;
+ u32 firmware_len = fw->fw_len;
+ u32 offset = 0;
+ u32 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) {
+ dev_err(adapter->dev, "unable to alloc buffer for firmware."
+ " Terminating download\n");
+ 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, HOST_F1_RD_BASE_0,
+ &base0);
+ if (ret) {
+ dev_err(adapter->dev, "dev BASE0 register read"
+ " failed: base0=0x%04X(%d). Terminating "
+ "download\n", base0, base0);
+ goto done;
+ }
+ ret = mwifiex_read_reg(adapter, HOST_F1_RD_BASE_1,
+ &base1);
+ if (ret) {
+ dev_err(adapter->dev, "dev BASE1 register read"
+ " failed: base1=0x%04X(%d). Terminating "
+ "download\n", base1, base1);
+ goto done;
+ }
+ len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
+
+ if (len)
+ break;
+
+ udelay(10);
+ }
+
+ if (!len) {
+ break;
+ } else if (len > MWIFIEX_UPLD_SIZE) {
+ dev_err(adapter->dev, "FW download 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 download failed @"
+ " %d, over max retry count\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, int *winner)
+{
+ int ret = 0;
+ u16 firmware_stat;
+ u32 tries;
+ u32 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) {
+ ret = 0;
+ break;
+ } else {
+ mdelay(100);
+ ret = -1;
+ }
+ }
+
+ if (winner && ret) {
+ if (mwifiex_read_reg
+ (adapter, CARD_FW_STATUS0_REG, &winner_status))
+ winner_status = 0;
+
+ if (winner_status)
+ *winner = 0;
+ else
+ *winner = 1;
+ }
+ return ret;
+}
+
+/*
+ * This function reads the interrupt status from card.
+ */
+static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
+{
+ struct sdio_mmc_card *card = adapter->card;
+ u32 sdio_ireg;
+ unsigned long flags;
+
+ if (mwifiex_read_data_sync(adapter, card->mp_regs, 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
+ * 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 assigns
+ * the main process in workqueue which will handle the interrupt.
+ */
+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->surprise_removed)
+ return;
+
+ if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
+ adapter->ps_state = PS_STATE_AWAKE;
+
+ mwifiex_interrupt_status(adapter);
+ queue_work(adapter->workqueue, &adapter->main_work);
+}
+
+/*
+ * 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;
+
+ 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 = *(u32 *) skb->data;
+
+ skb_pull(skb, MWIFIEX_EVENT_HEADER_LEN);
+
+ if ((skb->len > 0) && (skb->len < MAX_EVENT_SIZE))
+ memcpy(adapter->event_body, skb->data, 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 = 0;
+ u8 *curr_ptr;
+ u32 rx_len = skb->len;
+
+ if (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->mp_rd_bitmap & (~((u16) 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 (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
+ card->mpa_rx.buf_len,
+ (adapter->ioport | 0x1000 |
+ (card->mpa_rx.ports << 4)) +
+ card->mpa_rx.start_port, 1))
+ return -1;
+
+ curr_ptr = card->mpa_rx.buf;
+
+ for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
+
+ /* get curr PKT len & type */
+ pkt_len = *(u16 *) &curr_ptr[0];
+ pkt_type = *(u16 *) &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))
+ return -1;
+
+ mwifiex_decode_rx_packet(adapter, skb, pkt_type);
+ }
+
+ return 0;
+}
+
+/*
+ * 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;
+ 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;
+
+ 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;
+
+ if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
+ card->mp_wr_bitmap = ((u16) card->mp_regs[WR_BITMAP_U]) << 8;
+ card->mp_wr_bitmap |= (u16) card->mp_regs[WR_BITMAP_L];
+ dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%04x\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 (adapter->cmd_sent) {
+ /* Check if firmware has attach buffer at command port and
+ update just that in wr_bit_map. */
+ card->mp_wr_bitmap |=
+ (u16) card->mp_regs[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) {
+ card->mp_rd_bitmap = ((u16) card->mp_regs[RD_BITMAP_U]) << 8;
+ card->mp_rd_bitmap |= (u16) card->mp_regs[RD_BITMAP_L];
+ dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%04x\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 = RD_LEN_P0_L + (port << 1);
+ len_reg_u = 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)) {
+ u32 cr = 0;
+
+ dev_err(adapter->dev, "card_to_host_mpa failed:"
+ " int status=%#x\n", sdio_ireg);
+ if (mwifiex_read_reg(adapter,
+ CONFIGURATION_REG, &cr))
+ dev_err(adapter->dev,
+ "read CFG reg failed\n");
+
+ 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");
+
+ 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");
+
+ dev_dbg(adapter->dev,
+ "info: CFG reg val =%x\n", cr);
+ dev_kfree_skb_any(skb);
+ return -1;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * 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, u8 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;
+
+ if ((!card->mpa_tx.enabled) || (port == CTRL_PORT)) {
+ 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, 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);
+ ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
+ card->mpa_tx.buf_len,
+ (adapter->ioport | 0x1000 |
+ (card->mpa_tx.ports << 4)) +
+ card->mpa_tx.start_port);
+
+ 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, u8 *payload, u32 pkt_len,
+ struct mwifiex_tx_param *tx_param)
+{
+ struct sdio_mmc_card *card = adapter->card;
+ int ret;
+ u32 buf_block_len;
+ u32 blk_size;
+ u8 port = CTRL_PORT;
+
+ /* Allocate buffer and copy payload */
+ blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
+ buf_block_len = (pkt_len + blk_size - 1) / blk_size;
+ *(u16 *) &payload[0] = (u16) pkt_len;
+ *(u16 *) &payload[2] = 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);
+ }
+
+ /* 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;
+ } 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) {
+ dev_err(adapter->dev, "could not alloc buffer for MP-A TX\n");
+ 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) {
+ dev_err(adapter->dev, "could not alloc buffer for MP-A RX\n");
+ 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) {
+ /* Release the SDIO IRQ */
+ sdio_claim_host(card->func);
+ sdio_release_irq(card->func);
+ sdio_disable_func(card->func);
+ sdio_release_host(card->func);
+ sdio_set_drvdata(card->func, NULL);
+ }
+}
+
+/*
+ * 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 = 0;
+ struct sdio_mmc_card *card = adapter->card;
+ struct sdio_func *func = card->func;
+
+ /* save adapter pointer in card */
+ card->adapter = adapter;
+
+ sdio_claim_host(func);
+
+ /* Request the SDIO IRQ */
+ ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
+ if (ret) {
+ pr_err("claim irq failed: ret=%d\n", ret);
+ goto disable_func;
+ }
+
+ /* Set block size */
+ ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
+ if (ret) {
+ pr_err("cannot set SDIO block size\n");
+ ret = -1;
+ goto release_irq;
+ }
+
+ sdio_release_host(func);
+ sdio_set_drvdata(func, card);
+
+ adapter->dev = &func->dev;
+
+ return 0;
+
+release_irq:
+ sdio_release_irq(func);
+disable_func:
+ sdio_disable_func(func);
+ sdio_release_host(func);
+ adapter->card = NULL;
+
+ return -1;
+}
+
+/*
+ * 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
+ * - Get revision ID
+ * - 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;
+ int ret;
+ u32 sdio_ireg;
+
+ /*
+ * 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);
+
+ /* Disable host interrupt mask register for SDIO */
+ mwifiex_sdio_disable_host_int(adapter);
+
+ /* Get SDIO ioport */
+ mwifiex_init_sdio_ioport(adapter);
+
+ /* Get revision ID */
+#define REV_ID_REG 0x5c
+ mwifiex_read_reg(adapter, REV_ID_REG, &adapter->revision_id);
+
+ /* Initialize SDIO variables in card */
+ card->mp_rd_bitmap = 0;
+ card->mp_wr_bitmap = 0;
+ card->curr_rd_port = 1;
+ card->curr_wr_port = 1;
+
+ card->mp_data_port_mask = 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 = 0;
+ card->mpa_tx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT;
+
+ card->mpa_rx.buf_len = 0;
+ card->mpa_rx.pkt_cnt = 0;
+ card->mpa_rx.start_port = 0;
+
+ card->mpa_rx.enabled = 0;
+ card->mpa_rx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT;
+
+ /* Allocate buffers for SDIO MP-A */
+ card->mp_regs = kzalloc(MAX_MP_REGS, GFP_KERNEL);
+ if (!card->mp_regs) {
+ dev_err(adapter->dev, "failed to alloc mp_regs\n");
+ return -ENOMEM;
+ }
+
+ ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
+ SDIO_MP_TX_AGGR_DEF_BUF_SIZE,
+ SDIO_MP_RX_AGGR_DEF_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_tx.buf);
+ kfree(card->mpa_rx.buf);
+}
+
+/*
+ * 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;
+ int i;
+
+ card->mp_end_port = port;
+
+ card->mp_data_port_mask = DATA_PORT_MASK;
+
+ for (i = 1; i <= MAX_PORT - card->mp_end_port; i++)
+ card->mp_data_port_mask &= ~(1 << (MAX_PORT - i));
+
+ card->curr_wr_port = 1;
+
+ dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n",
+ port, card->mp_data_port_mask);
+}
+
+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,
+ .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,
+};
+
+/*
+ * 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);
+
+ 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)
+{
+ struct mwifiex_adapter *adapter = g_adapter;
+ int i;
+
+ if (down_interruptible(&add_remove_card_sem))
+ goto exit_sem_err;
+
+ if (!adapter || !adapter->priv_num)
+ goto exit;
+
+ if (adapter->is_suspended)
+ mwifiex_sdio_resume(adapter->dev);
+
+ for (i = 0; i < adapter->priv_num; i++)
+ if ((GET_BSS_ROLE(adapter->priv[i]) == MWIFIEX_BSS_ROLE_STA) &&
+ adapter->priv[i]->media_connected)
+ mwifiex_deauthenticate(adapter->priv[i], NULL);
+
+ if (!adapter->surprise_removed)
+ mwifiex_init_shutdown_fw(mwifiex_get_priv(adapter,
+ MWIFIEX_BSS_ROLE_ANY),
+ MWIFIEX_FUNC_SHUTDOWN);
+
+exit:
+ up(&add_remove_card_sem);
+
+exit_sem_err:
+ 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("sd8787.bin");
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