2 * Marvell Wireless LAN device driver: SDIO specific handling
4 * Copyright (C) 2011, Marvell International Ltd.
6 * This software file (the "File") is distributed by Marvell International
7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
8 * (the "License"). You may use, redistribute and/or modify this File in
9 * accordance with the terms and conditions of the License, a copy of which
10 * is available by writing to the Free Software Foundation, Inc.,
11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about
17 * this warranty disclaimer.
20 #include <linux/firmware.h>
32 #define SDIO_VERSION "1.0"
34 /* The mwifiex_sdio_remove() callback function is called when
35 * user removes this module from kernel space or ejects
36 * the card from the slot. The driver handles these 2 cases
38 * If the user is removing the module, the few commands (FUNC_SHUTDOWN,
39 * HS_CANCEL etc.) are sent to the firmware.
40 * If the card is removed, there is no need to send these command.
42 * The variable 'user_rmmod' is used to distinguish these two
43 * scenarios. This flag is initialized as FALSE in case the card
44 * is removed, and will be set to TRUE for module removal when
45 * module_exit function is called.
49 static struct mwifiex_if_ops sdio_ops;
51 static struct semaphore add_remove_card_sem;
53 static int mwifiex_sdio_resume(struct device *dev);
58 * This function probes an mwifiex device and registers it. It allocates
59 * the card structure, enables SDIO function number and initiates the
60 * device registration and initialization procedure by adding a logical
64 mwifiex_sdio_probe(struct sdio_func *func, const struct sdio_device_id *id)
67 struct sdio_mmc_card *card = NULL;
69 pr_debug("info: vendor=0x%4.04X device=0x%4.04X class=%d function=%d\n",
70 func->vendor, func->device, func->class, func->num);
72 card = kzalloc(sizeof(struct sdio_mmc_card), GFP_KERNEL);
78 func->card->quirks |= MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
80 sdio_claim_host(func);
81 ret = sdio_enable_func(func);
82 sdio_release_host(func);
85 pr_err("%s: failed to enable function\n", __func__);
90 if (mwifiex_add_card(card, &add_remove_card_sem, &sdio_ops,
92 pr_err("%s: add card failed\n", __func__);
94 sdio_claim_host(func);
95 ret = sdio_disable_func(func);
96 sdio_release_host(func);
106 * This function removes the interface and frees up the card structure.
109 mwifiex_sdio_remove(struct sdio_func *func)
111 struct sdio_mmc_card *card;
112 struct mwifiex_adapter *adapter;
113 struct mwifiex_private *priv;
116 pr_debug("info: SDIO func num=%d\n", func->num);
118 card = sdio_get_drvdata(func);
122 adapter = card->adapter;
123 if (!adapter || !adapter->priv_num)
126 /* In case driver is removed when asynchronous FW load is in progress */
127 wait_for_completion(&adapter->fw_load);
130 if (adapter->is_suspended)
131 mwifiex_sdio_resume(adapter->dev);
133 for (i = 0; i < adapter->priv_num; i++)
134 if ((GET_BSS_ROLE(adapter->priv[i]) ==
135 MWIFIEX_BSS_ROLE_STA) &&
136 adapter->priv[i]->media_connected)
137 mwifiex_deauthenticate(adapter->priv[i], NULL);
139 priv = mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_ANY);
140 mwifiex_disable_auto_ds(priv);
141 mwifiex_init_shutdown_fw(priv, MWIFIEX_FUNC_SHUTDOWN);
144 mwifiex_remove_card(card->adapter, &add_remove_card_sem);
151 * Kernel needs to suspend all functions separately. Therefore all
152 * registered functions must have drivers with suspend and resume
153 * methods. Failing that the kernel simply removes the whole card.
155 * If already not suspended, this function allocates and sends a host
156 * sleep activate request to the firmware and turns off the traffic.
158 static int mwifiex_sdio_suspend(struct device *dev)
160 struct sdio_func *func = dev_to_sdio_func(dev);
161 struct sdio_mmc_card *card;
162 struct mwifiex_adapter *adapter;
163 mmc_pm_flag_t pm_flag = 0;
168 pm_flag = sdio_get_host_pm_caps(func);
169 pr_debug("cmd: %s: suspend: PM flag = 0x%x\n",
170 sdio_func_id(func), pm_flag);
171 if (!(pm_flag & MMC_PM_KEEP_POWER)) {
172 pr_err("%s: cannot remain alive while host is"
173 " suspended\n", sdio_func_id(func));
177 card = sdio_get_drvdata(func);
178 if (!card || !card->adapter) {
179 pr_err("suspend: invalid card or adapter\n");
183 pr_err("suspend: sdio_func is not specified\n");
187 adapter = card->adapter;
189 /* Enable the Host Sleep */
190 if (!mwifiex_enable_hs(adapter)) {
191 dev_err(adapter->dev, "cmd: failed to suspend\n");
195 dev_dbg(adapter->dev, "cmd: suspend with MMC_PM_KEEP_POWER\n");
196 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
198 /* Indicate device suspended */
199 adapter->is_suspended = true;
201 for (i = 0; i < adapter->priv_num; i++)
202 netif_carrier_off(adapter->priv[i]->netdev);
210 * Kernel needs to suspend all functions separately. Therefore all
211 * registered functions must have drivers with suspend and resume
212 * methods. Failing that the kernel simply removes the whole card.
214 * If already not resumed, this function turns on the traffic and
215 * sends a host sleep cancel request to the firmware.
217 static int mwifiex_sdio_resume(struct device *dev)
219 struct sdio_func *func = dev_to_sdio_func(dev);
220 struct sdio_mmc_card *card;
221 struct mwifiex_adapter *adapter;
222 mmc_pm_flag_t pm_flag = 0;
226 pm_flag = sdio_get_host_pm_caps(func);
227 card = sdio_get_drvdata(func);
228 if (!card || !card->adapter) {
229 pr_err("resume: invalid card or adapter\n");
233 pr_err("resume: sdio_func is not specified\n");
237 adapter = card->adapter;
239 if (!adapter->is_suspended) {
240 dev_warn(adapter->dev, "device already resumed\n");
244 adapter->is_suspended = false;
246 for (i = 0; i < adapter->priv_num; i++)
247 if (adapter->priv[i]->media_connected)
248 netif_carrier_on(adapter->priv[i]->netdev);
250 /* Disable Host Sleep */
251 mwifiex_cancel_hs(mwifiex_get_priv(adapter, MWIFIEX_BSS_ROLE_STA),
257 /* Device ID for SD8786 */
258 #define SDIO_DEVICE_ID_MARVELL_8786 (0x9116)
259 /* Device ID for SD8787 */
260 #define SDIO_DEVICE_ID_MARVELL_8787 (0x9119)
261 /* Device ID for SD8797 */
262 #define SDIO_DEVICE_ID_MARVELL_8797 (0x9129)
265 static const struct sdio_device_id mwifiex_ids[] = {
266 {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8786)},
267 {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8787)},
268 {SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797)},
272 MODULE_DEVICE_TABLE(sdio, mwifiex_ids);
274 static const struct dev_pm_ops mwifiex_sdio_pm_ops = {
275 .suspend = mwifiex_sdio_suspend,
276 .resume = mwifiex_sdio_resume,
279 static struct sdio_driver mwifiex_sdio = {
280 .name = "mwifiex_sdio",
281 .id_table = mwifiex_ids,
282 .probe = mwifiex_sdio_probe,
283 .remove = mwifiex_sdio_remove,
285 .owner = THIS_MODULE,
286 .pm = &mwifiex_sdio_pm_ops,
291 * This function writes data into SDIO card register.
294 mwifiex_write_reg(struct mwifiex_adapter *adapter, u32 reg, u32 data)
296 struct sdio_mmc_card *card = adapter->card;
299 sdio_claim_host(card->func);
300 sdio_writeb(card->func, (u8) data, reg, &ret);
301 sdio_release_host(card->func);
307 * This function reads data from SDIO card register.
310 mwifiex_read_reg(struct mwifiex_adapter *adapter, u32 reg, u32 *data)
312 struct sdio_mmc_card *card = adapter->card;
316 sdio_claim_host(card->func);
317 val = sdio_readb(card->func, reg, &ret);
318 sdio_release_host(card->func);
326 * This function writes multiple data into SDIO card memory.
328 * This does not work in suspended mode.
331 mwifiex_write_data_sync(struct mwifiex_adapter *adapter,
332 u8 *buffer, u32 pkt_len, u32 port)
334 struct sdio_mmc_card *card = adapter->card;
337 (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE : BLOCK_MODE;
338 u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
341 BLOCK_MODE) ? (pkt_len /
342 MWIFIEX_SDIO_BLOCK_SIZE) : pkt_len;
343 u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
345 if (adapter->is_suspended) {
346 dev_err(adapter->dev,
347 "%s: not allowed while suspended\n", __func__);
351 sdio_claim_host(card->func);
353 if (!sdio_writesb(card->func, ioport, buffer, blk_cnt * blk_size))
356 sdio_release_host(card->func);
362 * This function reads multiple data from SDIO card memory.
364 static int mwifiex_read_data_sync(struct mwifiex_adapter *adapter, u8 *buffer,
365 u32 len, u32 port, u8 claim)
367 struct sdio_mmc_card *card = adapter->card;
369 u8 blk_mode = (port & MWIFIEX_SDIO_BYTE_MODE_MASK) ? BYTE_MODE
371 u32 blk_size = (blk_mode == BLOCK_MODE) ? MWIFIEX_SDIO_BLOCK_SIZE : 1;
372 u32 blk_cnt = (blk_mode == BLOCK_MODE) ? (len / MWIFIEX_SDIO_BLOCK_SIZE)
374 u32 ioport = (port & MWIFIEX_SDIO_IO_PORT_MASK);
377 sdio_claim_host(card->func);
379 if (!sdio_readsb(card->func, buffer, ioport, blk_cnt * blk_size))
383 sdio_release_host(card->func);
389 * This function wakes up the card.
391 * A host power up command is written to the card configuration
392 * register to wake up the card.
394 static int mwifiex_pm_wakeup_card(struct mwifiex_adapter *adapter)
396 dev_dbg(adapter->dev, "event: wakeup device...\n");
398 return mwifiex_write_reg(adapter, CONFIGURATION_REG, HOST_POWER_UP);
402 * This function is called after the card has woken up.
404 * The card configuration register is reset.
406 static int mwifiex_pm_wakeup_card_complete(struct mwifiex_adapter *adapter)
408 dev_dbg(adapter->dev, "cmd: wakeup device completed\n");
410 return mwifiex_write_reg(adapter, CONFIGURATION_REG, 0);
414 * This function initializes the IO ports.
416 * The following operations are performed -
417 * - Read the IO ports (0, 1 and 2)
418 * - Set host interrupt Reset-To-Read to clear
419 * - Set auto re-enable interrupt
421 static int mwifiex_init_sdio_ioport(struct mwifiex_adapter *adapter)
427 /* Read the IO port */
428 if (!mwifiex_read_reg(adapter, IO_PORT_0_REG, ®))
429 adapter->ioport |= (reg & 0xff);
433 if (!mwifiex_read_reg(adapter, IO_PORT_1_REG, ®))
434 adapter->ioport |= ((reg & 0xff) << 8);
438 if (!mwifiex_read_reg(adapter, IO_PORT_2_REG, ®))
439 adapter->ioport |= ((reg & 0xff) << 16);
443 pr_debug("info: SDIO FUNC1 IO port: %#x\n", adapter->ioport);
445 /* Set Host interrupt reset to read to clear */
446 if (!mwifiex_read_reg(adapter, HOST_INT_RSR_REG, ®))
447 mwifiex_write_reg(adapter, HOST_INT_RSR_REG,
448 reg | SDIO_INT_MASK);
452 /* Dnld/Upld ready set to auto reset */
453 if (!mwifiex_read_reg(adapter, CARD_MISC_CFG_REG, ®))
454 mwifiex_write_reg(adapter, CARD_MISC_CFG_REG,
455 reg | AUTO_RE_ENABLE_INT);
463 * This function sends data to the card.
465 static int mwifiex_write_data_to_card(struct mwifiex_adapter *adapter,
466 u8 *payload, u32 pkt_len, u32 port)
472 ret = mwifiex_write_data_sync(adapter, payload, pkt_len, port);
475 dev_err(adapter->dev, "host_to_card, write iomem"
476 " (%d) failed: %d\n", i, ret);
477 if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
478 dev_err(adapter->dev, "write CFG reg failed\n");
481 if (i > MAX_WRITE_IOMEM_RETRY)
490 * This function gets the read port.
492 * If control port bit is set in MP read bitmap, the control port
493 * is returned, otherwise the current read port is returned and
494 * the value is increased (provided it does not reach the maximum
495 * limit, in which case it is reset to 1)
497 static int mwifiex_get_rd_port(struct mwifiex_adapter *adapter, u8 *port)
499 struct sdio_mmc_card *card = adapter->card;
500 u16 rd_bitmap = card->mp_rd_bitmap;
502 dev_dbg(adapter->dev, "data: mp_rd_bitmap=0x%04x\n", rd_bitmap);
504 if (!(rd_bitmap & (CTRL_PORT_MASK | DATA_PORT_MASK)))
507 if (card->mp_rd_bitmap & CTRL_PORT_MASK) {
508 card->mp_rd_bitmap &= (u16) (~CTRL_PORT_MASK);
510 dev_dbg(adapter->dev, "data: port=%d mp_rd_bitmap=0x%04x\n",
511 *port, card->mp_rd_bitmap);
513 if (card->mp_rd_bitmap & (1 << card->curr_rd_port)) {
514 card->mp_rd_bitmap &= (u16)
515 (~(1 << card->curr_rd_port));
516 *port = card->curr_rd_port;
518 if (++card->curr_rd_port == MAX_PORT)
519 card->curr_rd_port = 1;
524 dev_dbg(adapter->dev,
525 "data: port=%d mp_rd_bitmap=0x%04x -> 0x%04x\n",
526 *port, rd_bitmap, card->mp_rd_bitmap);
532 * This function gets the write port for data.
534 * The current write port is returned if available and the value is
535 * increased (provided it does not reach the maximum limit, in which
536 * case it is reset to 1)
538 static int mwifiex_get_wr_port_data(struct mwifiex_adapter *adapter, u8 *port)
540 struct sdio_mmc_card *card = adapter->card;
541 u16 wr_bitmap = card->mp_wr_bitmap;
543 dev_dbg(adapter->dev, "data: mp_wr_bitmap=0x%04x\n", wr_bitmap);
545 if (!(wr_bitmap & card->mp_data_port_mask))
548 if (card->mp_wr_bitmap & (1 << card->curr_wr_port)) {
549 card->mp_wr_bitmap &= (u16) (~(1 << card->curr_wr_port));
550 *port = card->curr_wr_port;
551 if (++card->curr_wr_port == card->mp_end_port)
552 card->curr_wr_port = 1;
554 adapter->data_sent = true;
558 if (*port == CTRL_PORT) {
559 dev_err(adapter->dev, "invalid data port=%d cur port=%d"
560 " mp_wr_bitmap=0x%04x -> 0x%04x\n",
561 *port, card->curr_wr_port, wr_bitmap,
566 dev_dbg(adapter->dev, "data: port=%d mp_wr_bitmap=0x%04x -> 0x%04x\n",
567 *port, wr_bitmap, card->mp_wr_bitmap);
573 * This function polls the card status.
576 mwifiex_sdio_poll_card_status(struct mwifiex_adapter *adapter, u8 bits)
581 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
582 if (mwifiex_read_reg(adapter, CARD_STATUS_REG, &cs))
584 else if ((cs & bits) == bits)
587 usleep_range(10, 20);
590 dev_err(adapter->dev, "poll card status failed, tries = %d\n", tries);
596 * This function reads the firmware status.
599 mwifiex_sdio_read_fw_status(struct mwifiex_adapter *adapter, u16 *dat)
603 if (mwifiex_read_reg(adapter, CARD_FW_STATUS0_REG, &fws0))
606 if (mwifiex_read_reg(adapter, CARD_FW_STATUS1_REG, &fws1))
609 *dat = (u16) ((fws1 << 8) | fws0);
615 * This function disables the host interrupt.
617 * The host interrupt mask is read, the disable bit is reset and
618 * written back to the card host interrupt mask register.
620 static int mwifiex_sdio_disable_host_int(struct mwifiex_adapter *adapter)
624 /* Read back the host_int_mask register */
625 if (mwifiex_read_reg(adapter, HOST_INT_MASK_REG, &host_int_mask))
628 /* Update with the mask and write back to the register */
629 host_int_mask &= ~HOST_INT_DISABLE;
631 if (mwifiex_write_reg(adapter, HOST_INT_MASK_REG, host_int_mask)) {
632 dev_err(adapter->dev, "disable host interrupt failed\n");
640 * This function enables the host interrupt.
642 * The host interrupt enable mask is written to the card
643 * host interrupt mask register.
645 static int mwifiex_sdio_enable_host_int(struct mwifiex_adapter *adapter)
647 /* Simply write the mask to the register */
648 if (mwifiex_write_reg(adapter, HOST_INT_MASK_REG, HOST_INT_ENABLE)) {
649 dev_err(adapter->dev, "enable host interrupt failed\n");
656 * This function sends a data buffer to the card.
658 static int mwifiex_sdio_card_to_host(struct mwifiex_adapter *adapter,
659 u32 *type, u8 *buffer,
660 u32 npayload, u32 ioport)
666 dev_err(adapter->dev, "%s: buffer is NULL\n", __func__);
670 ret = mwifiex_read_data_sync(adapter, buffer, npayload, ioport, 1);
673 dev_err(adapter->dev, "%s: read iomem failed: %d\n", __func__,
678 nb = le16_to_cpu(*(__le16 *) (buffer));
680 dev_err(adapter->dev, "%s: invalid packet, nb=%d npayload=%d\n",
681 __func__, nb, npayload);
685 *type = le16_to_cpu(*(__le16 *) (buffer + 2));
691 * This function downloads the firmware to the card.
693 * Firmware is downloaded to the card in blocks. Every block download
694 * is tested for CRC errors, and retried a number of times before
697 static int mwifiex_prog_fw_w_helper(struct mwifiex_adapter *adapter,
698 struct mwifiex_fw_image *fw)
701 u8 *firmware = fw->fw_buf;
702 u32 firmware_len = fw->fw_len;
707 u32 txlen, tx_blocks = 0, tries;
711 dev_err(adapter->dev,
712 "firmware image not found! Terminating download\n");
716 dev_dbg(adapter->dev, "info: downloading FW image (%d bytes)\n",
719 /* Assume that the allocated buffer is 8-byte aligned */
720 fwbuf = kzalloc(MWIFIEX_UPLD_SIZE, GFP_KERNEL);
724 /* Perform firmware data transfer */
726 /* The host polls for the DN_LD_CARD_RDY and CARD_IO_READY
728 ret = mwifiex_sdio_poll_card_status(adapter, CARD_IO_READY |
731 dev_err(adapter->dev, "FW download with helper:"
732 " poll status timeout @ %d\n", offset);
737 if (offset >= firmware_len)
740 for (tries = 0; tries < MAX_POLL_TRIES; tries++) {
741 ret = mwifiex_read_reg(adapter, HOST_F1_RD_BASE_0,
744 dev_err(adapter->dev,
745 "dev BASE0 register read failed: "
746 "base0=%#04X(%d). Terminating dnld\n",
750 ret = mwifiex_read_reg(adapter, HOST_F1_RD_BASE_1,
753 dev_err(adapter->dev,
754 "dev BASE1 register read failed: "
755 "base1=%#04X(%d). Terminating dnld\n",
759 len = (u16) (((base1 & 0xff) << 8) | (base0 & 0xff));
764 usleep_range(10, 20);
769 } else if (len > MWIFIEX_UPLD_SIZE) {
770 dev_err(adapter->dev,
771 "FW dnld failed @ %d, invalid length %d\n",
781 if (i > MAX_WRITE_IOMEM_RETRY) {
782 dev_err(adapter->dev,
783 "FW dnld failed @ %d, over max retry\n",
788 dev_err(adapter->dev, "CRC indicated by the helper:"
789 " len = 0x%04X, txlen = %d\n", len, txlen);
791 /* Setting this to 0 to resend from same offset */
796 /* Set blocksize to transfer - checking for last
798 if (firmware_len - offset < txlen)
799 txlen = firmware_len - offset;
801 tx_blocks = (txlen + MWIFIEX_SDIO_BLOCK_SIZE - 1)
802 / MWIFIEX_SDIO_BLOCK_SIZE;
804 /* Copy payload to buffer */
805 memmove(fwbuf, &firmware[offset], txlen);
808 ret = mwifiex_write_data_sync(adapter, fwbuf, tx_blocks *
809 MWIFIEX_SDIO_BLOCK_SIZE,
812 dev_err(adapter->dev,
813 "FW download, write iomem (%d) failed @ %d\n",
815 if (mwifiex_write_reg(adapter, CONFIGURATION_REG, 0x04))
816 dev_err(adapter->dev, "write CFG reg failed\n");
825 dev_dbg(adapter->dev, "info: FW download over, size %d bytes\n",
835 * This function checks the firmware status in card.
837 * The winner interface is also determined by this function.
839 static int mwifiex_check_fw_status(struct mwifiex_adapter *adapter,
847 /* Wait for firmware initialization event */
848 for (tries = 0; tries < poll_num; tries++) {
849 ret = mwifiex_sdio_read_fw_status(adapter, &firmware_stat);
852 if (firmware_stat == FIRMWARE_READY_SDIO) {
863 (adapter, CARD_FW_STATUS0_REG, &winner_status))
875 * This function reads the interrupt status from card.
877 static void mwifiex_interrupt_status(struct mwifiex_adapter *adapter)
879 struct sdio_mmc_card *card = adapter->card;
883 if (mwifiex_read_data_sync(adapter, card->mp_regs, MAX_MP_REGS,
884 REG_PORT | MWIFIEX_SDIO_BYTE_MODE_MASK,
886 dev_err(adapter->dev, "read mp_regs failed\n");
890 sdio_ireg = card->mp_regs[HOST_INTSTATUS_REG];
893 * DN_LD_HOST_INT_STATUS and/or UP_LD_HOST_INT_STATUS
894 * Clear the interrupt status register
896 dev_dbg(adapter->dev, "int: sdio_ireg = %#x\n", sdio_ireg);
897 spin_lock_irqsave(&adapter->int_lock, flags);
898 adapter->int_status |= sdio_ireg;
899 spin_unlock_irqrestore(&adapter->int_lock, flags);
904 * SDIO interrupt handler.
906 * This function reads the interrupt status from firmware and handles
907 * the interrupt in current thread (ksdioirqd) right away.
910 mwifiex_sdio_interrupt(struct sdio_func *func)
912 struct mwifiex_adapter *adapter;
913 struct sdio_mmc_card *card;
915 card = sdio_get_drvdata(func);
916 if (!card || !card->adapter) {
917 pr_debug("int: func=%p card=%p adapter=%p\n",
918 func, card, card ? card->adapter : NULL);
921 adapter = card->adapter;
923 if (adapter->surprise_removed)
926 if (!adapter->pps_uapsd_mode && adapter->ps_state == PS_STATE_SLEEP)
927 adapter->ps_state = PS_STATE_AWAKE;
929 mwifiex_interrupt_status(adapter);
930 mwifiex_main_process(adapter);
934 * This function decodes a received packet.
936 * Based on the type, the packet is treated as either a data, or
937 * a command response, or an event, and the correct handler
938 * function is invoked.
940 static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
941 struct sk_buff *skb, u32 upld_typ)
945 skb_pull(skb, INTF_HEADER_LEN);
948 case MWIFIEX_TYPE_DATA:
949 dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
950 mwifiex_handle_rx_packet(adapter, skb);
953 case MWIFIEX_TYPE_CMD:
954 dev_dbg(adapter->dev, "info: --- Rx: Cmd Response ---\n");
955 /* take care of curr_cmd = NULL case */
956 if (!adapter->curr_cmd) {
957 cmd_buf = adapter->upld_buf;
959 if (adapter->ps_state == PS_STATE_SLEEP_CFM)
960 mwifiex_process_sleep_confirm_resp(adapter,
964 memcpy(cmd_buf, skb->data,
965 min_t(u32, MWIFIEX_SIZE_OF_CMD_BUFFER,
968 dev_kfree_skb_any(skb);
970 adapter->cmd_resp_received = true;
971 adapter->curr_cmd->resp_skb = skb;
975 case MWIFIEX_TYPE_EVENT:
976 dev_dbg(adapter->dev, "info: --- Rx: Event ---\n");
977 adapter->event_cause = *(u32 *) skb->data;
979 if ((skb->len > 0) && (skb->len < MAX_EVENT_SIZE))
980 memcpy(adapter->event_body,
981 skb->data + MWIFIEX_EVENT_HEADER_LEN,
984 /* event cause has been saved to adapter->event_cause */
985 adapter->event_received = true;
986 adapter->event_skb = skb;
991 dev_err(adapter->dev, "unknown upload type %#x\n", upld_typ);
992 dev_kfree_skb_any(skb);
1000 * This function transfers received packets from card to driver, performing
1001 * aggregation if required.
1003 * For data received on control port, or if aggregation is disabled, the
1004 * received buffers are uploaded as separate packets. However, if aggregation
1005 * is enabled and required, the buffers are copied onto an aggregation buffer,
1006 * provided there is space left, processed and finally uploaded.
1008 static int mwifiex_sdio_card_to_host_mp_aggr(struct mwifiex_adapter *adapter,
1009 struct sk_buff *skb, u8 port)
1011 struct sdio_mmc_card *card = adapter->card;
1012 s32 f_do_rx_aggr = 0;
1013 s32 f_do_rx_cur = 0;
1015 struct sk_buff *skb_deaggr;
1017 u32 pkt_len, pkt_type = 0;
1019 u32 rx_len = skb->len;
1021 if (port == CTRL_PORT) {
1022 /* Read the command Resp without aggr */
1023 dev_dbg(adapter->dev, "info: %s: no aggregation for cmd "
1024 "response\n", __func__);
1027 goto rx_curr_single;
1030 if (!card->mpa_rx.enabled) {
1031 dev_dbg(adapter->dev, "info: %s: rx aggregation disabled\n",
1035 goto rx_curr_single;
1038 if (card->mp_rd_bitmap & (~((u16) CTRL_PORT_MASK))) {
1039 /* Some more data RX pending */
1040 dev_dbg(adapter->dev, "info: %s: not last packet\n", __func__);
1042 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1043 if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len)) {
1046 /* No room in Aggr buf, do rx aggr now */
1051 /* Rx aggr not in progress */
1056 /* No more data RX pending */
1057 dev_dbg(adapter->dev, "info: %s: last packet\n", __func__);
1059 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1061 if (MP_RX_AGGR_BUF_HAS_ROOM(card, skb->len))
1064 /* No room in Aggr buf, do rx aggr now */
1072 dev_dbg(adapter->dev, "info: current packet aggregation\n");
1073 /* Curr pkt can be aggregated */
1074 MP_RX_AGGR_SETUP(card, skb, port);
1076 if (MP_RX_AGGR_PKT_LIMIT_REACHED(card) ||
1077 MP_RX_AGGR_PORT_LIMIT_REACHED(card)) {
1078 dev_dbg(adapter->dev, "info: %s: aggregated packet "
1079 "limit reached\n", __func__);
1080 /* No more pkts allowed in Aggr buf, rx it */
1086 /* do aggr RX now */
1087 dev_dbg(adapter->dev, "info: do_rx_aggr: num of packets: %d\n",
1088 card->mpa_rx.pkt_cnt);
1090 if (mwifiex_read_data_sync(adapter, card->mpa_rx.buf,
1091 card->mpa_rx.buf_len,
1092 (adapter->ioport | 0x1000 |
1093 (card->mpa_rx.ports << 4)) +
1094 card->mpa_rx.start_port, 1))
1097 curr_ptr = card->mpa_rx.buf;
1099 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1101 /* get curr PKT len & type */
1102 pkt_len = *(u16 *) &curr_ptr[0];
1103 pkt_type = *(u16 *) &curr_ptr[2];
1105 /* copy pkt to deaggr buf */
1106 skb_deaggr = card->mpa_rx.skb_arr[pind];
1108 if ((pkt_type == MWIFIEX_TYPE_DATA) && (pkt_len <=
1109 card->mpa_rx.len_arr[pind])) {
1111 memcpy(skb_deaggr->data, curr_ptr, pkt_len);
1113 skb_trim(skb_deaggr, pkt_len);
1115 /* Process de-aggr packet */
1116 mwifiex_decode_rx_packet(adapter, skb_deaggr,
1119 dev_err(adapter->dev, "wrong aggr pkt:"
1120 " type=%d len=%d max_len=%d\n",
1122 card->mpa_rx.len_arr[pind]);
1123 dev_kfree_skb_any(skb_deaggr);
1125 curr_ptr += card->mpa_rx.len_arr[pind];
1127 MP_RX_AGGR_BUF_RESET(card);
1132 dev_dbg(adapter->dev, "info: RX: port: %d, rx_len: %d\n",
1135 if (mwifiex_sdio_card_to_host(adapter, &pkt_type,
1136 skb->data, skb->len,
1137 adapter->ioport + port))
1140 mwifiex_decode_rx_packet(adapter, skb, pkt_type);
1146 if (MP_RX_AGGR_IN_PROGRESS(card)) {
1147 /* Multiport-aggregation transfer failed - cleanup */
1148 for (pind = 0; pind < card->mpa_rx.pkt_cnt; pind++) {
1149 /* copy pkt to deaggr buf */
1150 skb_deaggr = card->mpa_rx.skb_arr[pind];
1151 dev_kfree_skb_any(skb_deaggr);
1153 MP_RX_AGGR_BUF_RESET(card);
1157 /* Single transfer pending. Free curr buff also */
1158 dev_kfree_skb_any(skb);
1164 * This function checks the current interrupt status.
1166 * The following interrupts are checked and handled by this function -
1169 * - Packets received
1171 * Since the firmware does not generate download ready interrupt if the
1172 * port updated is command port only, command sent interrupt checking
1173 * should be done manually, and for every SDIO interrupt.
1175 * In case of Rx packets received, the packets are uploaded from card to
1176 * host and processed accordingly.
1178 static int mwifiex_process_int_status(struct mwifiex_adapter *adapter)
1180 struct sdio_mmc_card *card = adapter->card;
1183 struct sk_buff *skb;
1184 u8 port = CTRL_PORT;
1185 u32 len_reg_l, len_reg_u;
1188 unsigned long flags;
1190 spin_lock_irqsave(&adapter->int_lock, flags);
1191 sdio_ireg = adapter->int_status;
1192 adapter->int_status = 0;
1193 spin_unlock_irqrestore(&adapter->int_lock, flags);
1198 if (sdio_ireg & DN_LD_HOST_INT_STATUS) {
1199 card->mp_wr_bitmap = ((u16) card->mp_regs[WR_BITMAP_U]) << 8;
1200 card->mp_wr_bitmap |= (u16) card->mp_regs[WR_BITMAP_L];
1201 dev_dbg(adapter->dev, "int: DNLD: wr_bitmap=0x%04x\n",
1202 card->mp_wr_bitmap);
1203 if (adapter->data_sent &&
1204 (card->mp_wr_bitmap & card->mp_data_port_mask)) {
1205 dev_dbg(adapter->dev,
1206 "info: <--- Tx DONE Interrupt --->\n");
1207 adapter->data_sent = false;
1211 /* As firmware will not generate download ready interrupt if the port
1212 updated is command port only, cmd_sent should be done for any SDIO
1214 if (adapter->cmd_sent) {
1215 /* Check if firmware has attach buffer at command port and
1216 update just that in wr_bit_map. */
1217 card->mp_wr_bitmap |=
1218 (u16) card->mp_regs[WR_BITMAP_L] & CTRL_PORT_MASK;
1219 if (card->mp_wr_bitmap & CTRL_PORT_MASK)
1220 adapter->cmd_sent = false;
1223 dev_dbg(adapter->dev, "info: cmd_sent=%d data_sent=%d\n",
1224 adapter->cmd_sent, adapter->data_sent);
1225 if (sdio_ireg & UP_LD_HOST_INT_STATUS) {
1226 card->mp_rd_bitmap = ((u16) card->mp_regs[RD_BITMAP_U]) << 8;
1227 card->mp_rd_bitmap |= (u16) card->mp_regs[RD_BITMAP_L];
1228 dev_dbg(adapter->dev, "int: UPLD: rd_bitmap=0x%04x\n",
1229 card->mp_rd_bitmap);
1232 ret = mwifiex_get_rd_port(adapter, &port);
1234 dev_dbg(adapter->dev,
1235 "info: no more rd_port available\n");
1238 len_reg_l = RD_LEN_P0_L + (port << 1);
1239 len_reg_u = RD_LEN_P0_U + (port << 1);
1240 rx_len = ((u16) card->mp_regs[len_reg_u]) << 8;
1241 rx_len |= (u16) card->mp_regs[len_reg_l];
1242 dev_dbg(adapter->dev, "info: RX: port=%d rx_len=%u\n",
1245 (rx_len + MWIFIEX_SDIO_BLOCK_SIZE -
1246 1) / MWIFIEX_SDIO_BLOCK_SIZE;
1247 if (rx_len <= INTF_HEADER_LEN ||
1248 (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE) >
1249 MWIFIEX_RX_DATA_BUF_SIZE) {
1250 dev_err(adapter->dev, "invalid rx_len=%d\n",
1254 rx_len = (u16) (rx_blocks * MWIFIEX_SDIO_BLOCK_SIZE);
1256 skb = dev_alloc_skb(rx_len);
1259 dev_err(adapter->dev, "%s: failed to alloc skb",
1264 skb_put(skb, rx_len);
1266 dev_dbg(adapter->dev, "info: rx_len = %d skb->len = %d\n",
1269 if (mwifiex_sdio_card_to_host_mp_aggr(adapter, skb,
1273 dev_err(adapter->dev, "card_to_host_mpa failed:"
1274 " int status=%#x\n", sdio_ireg);
1275 if (mwifiex_read_reg(adapter,
1276 CONFIGURATION_REG, &cr))
1277 dev_err(adapter->dev,
1278 "read CFG reg failed\n");
1280 dev_dbg(adapter->dev,
1281 "info: CFG reg val = %d\n", cr);
1282 if (mwifiex_write_reg(adapter,
1285 dev_err(adapter->dev,
1286 "write CFG reg failed\n");
1288 dev_dbg(adapter->dev, "info: write success\n");
1289 if (mwifiex_read_reg(adapter,
1290 CONFIGURATION_REG, &cr))
1291 dev_err(adapter->dev,
1292 "read CFG reg failed\n");
1294 dev_dbg(adapter->dev,
1295 "info: CFG reg val =%x\n", cr);
1305 * This function aggregates transmission buffers in driver and downloads
1306 * the aggregated packet to card.
1308 * The individual packets are aggregated by copying into an aggregation
1309 * buffer and then downloaded to the card. Previous unsent packets in the
1310 * aggregation buffer are pre-copied first before new packets are added.
1311 * Aggregation is done till there is space left in the aggregation buffer,
1312 * or till new packets are available.
1314 * The function will only download the packet to the card when aggregation
1315 * stops, otherwise it will just aggregate the packet in aggregation buffer
1318 static int mwifiex_host_to_card_mp_aggr(struct mwifiex_adapter *adapter,
1319 u8 *payload, u32 pkt_len, u8 port,
1322 struct sdio_mmc_card *card = adapter->card;
1324 s32 f_send_aggr_buf = 0;
1325 s32 f_send_cur_buf = 0;
1326 s32 f_precopy_cur_buf = 0;
1327 s32 f_postcopy_cur_buf = 0;
1329 if ((!card->mpa_tx.enabled) || (port == CTRL_PORT)) {
1330 dev_dbg(adapter->dev, "info: %s: tx aggregation disabled\n",
1334 goto tx_curr_single;
1338 /* More pkt in TX queue */
1339 dev_dbg(adapter->dev, "info: %s: more packets in queue.\n",
1342 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1343 if (!MP_TX_AGGR_PORT_LIMIT_REACHED(card) &&
1344 MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len)) {
1345 f_precopy_cur_buf = 1;
1347 if (!(card->mp_wr_bitmap &
1348 (1 << card->curr_wr_port)) ||
1349 !MP_TX_AGGR_BUF_HAS_ROOM(
1350 card, pkt_len + next_pkt_len))
1351 f_send_aggr_buf = 1;
1353 /* No room in Aggr buf, send it */
1354 f_send_aggr_buf = 1;
1356 if (MP_TX_AGGR_PORT_LIMIT_REACHED(card) ||
1357 !(card->mp_wr_bitmap &
1358 (1 << card->curr_wr_port)))
1361 f_postcopy_cur_buf = 1;
1364 if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len) &&
1365 (card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1366 f_precopy_cur_buf = 1;
1371 /* Last pkt in TX queue */
1372 dev_dbg(adapter->dev, "info: %s: Last packet in Tx Queue.\n",
1375 if (MP_TX_AGGR_IN_PROGRESS(card)) {
1376 /* some packs in Aggr buf already */
1377 f_send_aggr_buf = 1;
1379 if (MP_TX_AGGR_BUF_HAS_ROOM(card, pkt_len))
1380 f_precopy_cur_buf = 1;
1382 /* No room in Aggr buf, send it */
1389 if (f_precopy_cur_buf) {
1390 dev_dbg(adapter->dev, "data: %s: precopy current buffer\n",
1392 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1394 if (MP_TX_AGGR_PKT_LIMIT_REACHED(card) ||
1395 MP_TX_AGGR_PORT_LIMIT_REACHED(card))
1396 /* No more pkts allowed in Aggr buf, send it */
1397 f_send_aggr_buf = 1;
1400 if (f_send_aggr_buf) {
1401 dev_dbg(adapter->dev, "data: %s: send aggr buffer: %d %d\n",
1403 card->mpa_tx.start_port, card->mpa_tx.ports);
1404 ret = mwifiex_write_data_to_card(adapter, card->mpa_tx.buf,
1405 card->mpa_tx.buf_len,
1406 (adapter->ioport | 0x1000 |
1407 (card->mpa_tx.ports << 4)) +
1408 card->mpa_tx.start_port);
1410 MP_TX_AGGR_BUF_RESET(card);
1414 if (f_send_cur_buf) {
1415 dev_dbg(adapter->dev, "data: %s: send current buffer %d\n",
1417 ret = mwifiex_write_data_to_card(adapter, payload, pkt_len,
1418 adapter->ioport + port);
1421 if (f_postcopy_cur_buf) {
1422 dev_dbg(adapter->dev, "data: %s: postcopy current buffer\n",
1424 MP_TX_AGGR_BUF_PUT(card, payload, pkt_len, port);
1431 * This function downloads data from driver to card.
1433 * Both commands and data packets are transferred to the card by this
1436 * This function adds the SDIO specific header to the front of the buffer
1437 * before transferring. The header contains the length of the packet and
1438 * the type. The firmware handles the packets based upon this set type.
1440 static int mwifiex_sdio_host_to_card(struct mwifiex_adapter *adapter,
1441 u8 type, struct sk_buff *skb,
1442 struct mwifiex_tx_param *tx_param)
1444 struct sdio_mmc_card *card = adapter->card;
1448 u8 port = CTRL_PORT;
1449 u8 *payload = (u8 *)skb->data;
1450 u32 pkt_len = skb->len;
1452 /* Allocate buffer and copy payload */
1453 blk_size = MWIFIEX_SDIO_BLOCK_SIZE;
1454 buf_block_len = (pkt_len + blk_size - 1) / blk_size;
1455 *(u16 *) &payload[0] = (u16) pkt_len;
1456 *(u16 *) &payload[2] = type;
1459 * This is SDIO specific header
1461 * u16 type (MWIFIEX_TYPE_DATA = 0, MWIFIEX_TYPE_CMD = 1,
1462 * MWIFIEX_TYPE_EVENT = 3)
1464 if (type == MWIFIEX_TYPE_DATA) {
1465 ret = mwifiex_get_wr_port_data(adapter, &port);
1467 dev_err(adapter->dev, "%s: no wr_port available\n",
1472 adapter->cmd_sent = true;
1473 /* Type must be MWIFIEX_TYPE_CMD */
1475 if (pkt_len <= INTF_HEADER_LEN ||
1476 pkt_len > MWIFIEX_UPLD_SIZE)
1477 dev_err(adapter->dev, "%s: payload=%p, nb=%d\n",
1478 __func__, payload, pkt_len);
1481 /* Transfer data to card */
1482 pkt_len = buf_block_len * blk_size;
1485 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1486 port, tx_param->next_pkt_len
1489 ret = mwifiex_host_to_card_mp_aggr(adapter, payload, pkt_len,
1493 if (type == MWIFIEX_TYPE_CMD)
1494 adapter->cmd_sent = false;
1495 if (type == MWIFIEX_TYPE_DATA)
1496 adapter->data_sent = false;
1498 if (type == MWIFIEX_TYPE_DATA) {
1499 if (!(card->mp_wr_bitmap & (1 << card->curr_wr_port)))
1500 adapter->data_sent = true;
1502 adapter->data_sent = false;
1510 * This function allocates the MPA Tx and Rx buffers.
1512 static int mwifiex_alloc_sdio_mpa_buffers(struct mwifiex_adapter *adapter,
1513 u32 mpa_tx_buf_size, u32 mpa_rx_buf_size)
1515 struct sdio_mmc_card *card = adapter->card;
1518 card->mpa_tx.buf = kzalloc(mpa_tx_buf_size, GFP_KERNEL);
1519 if (!card->mpa_tx.buf) {
1524 card->mpa_tx.buf_size = mpa_tx_buf_size;
1526 card->mpa_rx.buf = kzalloc(mpa_rx_buf_size, GFP_KERNEL);
1527 if (!card->mpa_rx.buf) {
1532 card->mpa_rx.buf_size = mpa_rx_buf_size;
1536 kfree(card->mpa_tx.buf);
1537 kfree(card->mpa_rx.buf);
1544 * This function unregisters the SDIO device.
1546 * The SDIO IRQ is released, the function is disabled and driver
1547 * data is set to null.
1550 mwifiex_unregister_dev(struct mwifiex_adapter *adapter)
1552 struct sdio_mmc_card *card = adapter->card;
1554 if (adapter->card) {
1555 /* Release the SDIO IRQ */
1556 sdio_claim_host(card->func);
1557 sdio_release_irq(card->func);
1558 sdio_disable_func(card->func);
1559 sdio_release_host(card->func);
1560 sdio_set_drvdata(card->func, NULL);
1565 * This function registers the SDIO device.
1567 * SDIO IRQ is claimed, block size is set and driver data is initialized.
1569 static int mwifiex_register_dev(struct mwifiex_adapter *adapter)
1572 struct sdio_mmc_card *card = adapter->card;
1573 struct sdio_func *func = card->func;
1575 /* save adapter pointer in card */
1576 card->adapter = adapter;
1578 sdio_claim_host(func);
1580 /* Request the SDIO IRQ */
1581 ret = sdio_claim_irq(func, mwifiex_sdio_interrupt);
1583 pr_err("claim irq failed: ret=%d\n", ret);
1587 /* Set block size */
1588 ret = sdio_set_block_size(card->func, MWIFIEX_SDIO_BLOCK_SIZE);
1590 pr_err("cannot set SDIO block size\n");
1595 sdio_release_host(func);
1596 sdio_set_drvdata(func, card);
1598 adapter->dev = &func->dev;
1600 switch (func->device) {
1601 case SDIO_DEVICE_ID_MARVELL_8786:
1602 strcpy(adapter->fw_name, SD8786_DEFAULT_FW_NAME);
1604 case SDIO_DEVICE_ID_MARVELL_8797:
1605 strcpy(adapter->fw_name, SD8797_DEFAULT_FW_NAME);
1607 case SDIO_DEVICE_ID_MARVELL_8787:
1609 strcpy(adapter->fw_name, SD8787_DEFAULT_FW_NAME);
1616 sdio_release_irq(func);
1618 sdio_disable_func(func);
1619 sdio_release_host(func);
1620 adapter->card = NULL;
1626 * This function initializes the SDIO driver.
1628 * The following initializations steps are followed -
1629 * - Read the Host interrupt status register to acknowledge
1630 * the first interrupt got from bootloader
1631 * - Disable host interrupt mask register
1633 * - Initialize SDIO variables in card
1634 * - Allocate MP registers
1635 * - Allocate MPA Tx and Rx buffers
1637 static int mwifiex_init_sdio(struct mwifiex_adapter *adapter)
1639 struct sdio_mmc_card *card = adapter->card;
1644 * Read the HOST_INT_STATUS_REG for ACK the first interrupt got
1645 * from the bootloader. If we don't do this we get a interrupt
1646 * as soon as we register the irq.
1648 mwifiex_read_reg(adapter, HOST_INTSTATUS_REG, &sdio_ireg);
1650 /* Disable host interrupt mask register for SDIO */
1651 mwifiex_sdio_disable_host_int(adapter);
1653 /* Get SDIO ioport */
1654 mwifiex_init_sdio_ioport(adapter);
1656 /* Initialize SDIO variables in card */
1657 card->mp_rd_bitmap = 0;
1658 card->mp_wr_bitmap = 0;
1659 card->curr_rd_port = 1;
1660 card->curr_wr_port = 1;
1662 card->mp_data_port_mask = DATA_PORT_MASK;
1664 card->mpa_tx.buf_len = 0;
1665 card->mpa_tx.pkt_cnt = 0;
1666 card->mpa_tx.start_port = 0;
1668 card->mpa_tx.enabled = 1;
1669 card->mpa_tx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT;
1671 card->mpa_rx.buf_len = 0;
1672 card->mpa_rx.pkt_cnt = 0;
1673 card->mpa_rx.start_port = 0;
1675 card->mpa_rx.enabled = 1;
1676 card->mpa_rx.pkt_aggr_limit = SDIO_MP_AGGR_DEF_PKT_LIMIT;
1678 /* Allocate buffers for SDIO MP-A */
1679 card->mp_regs = kzalloc(MAX_MP_REGS, GFP_KERNEL);
1683 ret = mwifiex_alloc_sdio_mpa_buffers(adapter,
1684 SDIO_MP_TX_AGGR_DEF_BUF_SIZE,
1685 SDIO_MP_RX_AGGR_DEF_BUF_SIZE);
1687 dev_err(adapter->dev, "failed to alloc sdio mp-a buffers\n");
1688 kfree(card->mp_regs);
1696 * This function resets the MPA Tx and Rx buffers.
1698 static void mwifiex_cleanup_mpa_buf(struct mwifiex_adapter *adapter)
1700 struct sdio_mmc_card *card = adapter->card;
1702 MP_TX_AGGR_BUF_RESET(card);
1703 MP_RX_AGGR_BUF_RESET(card);
1707 * This function cleans up the allocated card buffers.
1709 * The following are freed by this function -
1714 static void mwifiex_cleanup_sdio(struct mwifiex_adapter *adapter)
1716 struct sdio_mmc_card *card = adapter->card;
1718 kfree(card->mp_regs);
1719 kfree(card->mpa_tx.buf);
1720 kfree(card->mpa_rx.buf);
1724 * This function updates the MP end port in card.
1727 mwifiex_update_mp_end_port(struct mwifiex_adapter *adapter, u16 port)
1729 struct sdio_mmc_card *card = adapter->card;
1732 card->mp_end_port = port;
1734 card->mp_data_port_mask = DATA_PORT_MASK;
1736 for (i = 1; i <= MAX_PORT - card->mp_end_port; i++)
1737 card->mp_data_port_mask &= ~(1 << (MAX_PORT - i));
1739 card->curr_wr_port = 1;
1741 dev_dbg(adapter->dev, "cmd: mp_end_port %d, data port mask 0x%x\n",
1742 port, card->mp_data_port_mask);
1745 static struct mmc_host *reset_host;
1746 static void sdio_card_reset_worker(struct work_struct *work)
1748 /* The actual reset operation must be run outside of driver thread.
1749 * This is because mmc_remove_host() will cause the device to be
1750 * instantly destroyed, and the driver then needs to end its thread,
1751 * leading to a deadlock.
1753 * We run it in a totally independent workqueue.
1756 pr_err("Resetting card...\n");
1757 mmc_remove_host(reset_host);
1758 /* 20ms delay is based on experiment with sdhci controller */
1760 mmc_add_host(reset_host);
1762 static DECLARE_WORK(card_reset_work, sdio_card_reset_worker);
1764 /* This function resets the card */
1765 static void mwifiex_sdio_card_reset(struct mwifiex_adapter *adapter)
1767 struct sdio_mmc_card *card = adapter->card;
1769 if (work_pending(&card_reset_work))
1772 reset_host = card->func->card->host;
1773 schedule_work(&card_reset_work);
1776 static struct mwifiex_if_ops sdio_ops = {
1777 .init_if = mwifiex_init_sdio,
1778 .cleanup_if = mwifiex_cleanup_sdio,
1779 .check_fw_status = mwifiex_check_fw_status,
1780 .prog_fw = mwifiex_prog_fw_w_helper,
1781 .register_dev = mwifiex_register_dev,
1782 .unregister_dev = mwifiex_unregister_dev,
1783 .enable_int = mwifiex_sdio_enable_host_int,
1784 .process_int_status = mwifiex_process_int_status,
1785 .host_to_card = mwifiex_sdio_host_to_card,
1786 .wakeup = mwifiex_pm_wakeup_card,
1787 .wakeup_complete = mwifiex_pm_wakeup_card_complete,
1790 .update_mp_end_port = mwifiex_update_mp_end_port,
1791 .cleanup_mpa_buf = mwifiex_cleanup_mpa_buf,
1792 .cmdrsp_complete = mwifiex_sdio_cmdrsp_complete,
1793 .event_complete = mwifiex_sdio_event_complete,
1794 .card_reset = mwifiex_sdio_card_reset,
1798 * This function initializes the SDIO driver.
1800 * This initiates the semaphore and registers the device with
1804 mwifiex_sdio_init_module(void)
1806 sema_init(&add_remove_card_sem, 1);
1808 /* Clear the flag in case user removes the card. */
1811 return sdio_register_driver(&mwifiex_sdio);
1815 * This function cleans up the SDIO driver.
1817 * The following major steps are followed for cleanup -
1818 * - Resume the device if its suspended
1819 * - Disconnect the device if connected
1820 * - Shutdown the firmware
1821 * - Unregister the device from SDIO bus.
1824 mwifiex_sdio_cleanup_module(void)
1826 if (!down_interruptible(&add_remove_card_sem))
1827 up(&add_remove_card_sem);
1829 /* Set the flag as user is removing this module. */
1832 cancel_work_sync(&card_reset_work);
1833 sdio_unregister_driver(&mwifiex_sdio);
1836 module_init(mwifiex_sdio_init_module);
1837 module_exit(mwifiex_sdio_cleanup_module);
1839 MODULE_AUTHOR("Marvell International Ltd.");
1840 MODULE_DESCRIPTION("Marvell WiFi-Ex SDIO Driver version " SDIO_VERSION);
1841 MODULE_VERSION(SDIO_VERSION);
1842 MODULE_LICENSE("GPL v2");
1843 MODULE_FIRMWARE(SD8786_DEFAULT_FW_NAME);
1844 MODULE_FIRMWARE(SD8787_DEFAULT_FW_NAME);
1845 MODULE_FIRMWARE(SD8797_DEFAULT_FW_NAME);