1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * linux/drivers/net/wireless/libertas/if_sdio.c
5 * Copyright 2007-2008 Pierre Ossman
7 * Inspired by if_cs.c, Copyright 2007 Holger Schurig
9 * This hardware has more or less no CMD53 support, so all registers
10 * must be accessed using sdio_readb()/sdio_writeb().
12 * Transfers must be in one transaction or the firmware goes bonkers.
13 * This means that the transfer must either be small enough to do a
14 * byte based transfer or it must be padded to a multiple of the
17 * As SDIO is still new to the kernel, it is unfortunately common with
18 * bugs in the host controllers related to that. One such bug is that
19 * controllers cannot do transfers that aren't a multiple of 4 bytes.
20 * If you don't have time to fix the host controller driver, you can
21 * work around the problem by modifying if_sdio_host_to_card() and
22 * if_sdio_card_to_host() to pad the data.
25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/slab.h>
30 #include <linux/firmware.h>
31 #include <linux/netdevice.h>
32 #include <linux/delay.h>
33 #include <linux/mmc/card.h>
34 #include <linux/mmc/sdio_func.h>
35 #include <linux/mmc/sdio_ids.h>
36 #include <linux/mmc/sdio.h>
37 #include <linux/mmc/host.h>
38 #include <linux/pm_runtime.h>
47 static void if_sdio_interrupt(struct sdio_func *func);
49 /* The if_sdio_remove() callback function is called when
50 * user removes this module from kernel space or ejects
51 * the card from the slot. The driver handles these 2 cases
52 * differently for SD8688 combo chip.
53 * If the user is removing the module, the FUNC_SHUTDOWN
54 * command for SD8688 is sent to the firmware.
55 * If the card is removed, there is no need to send this command.
57 * The variable 'user_rmmod' is used to distinguish these two
58 * scenarios. This flag is initialized as FALSE in case the card
59 * is removed, and will be set to TRUE for module removal when
60 * module_exit function is called.
64 static const struct sdio_device_id if_sdio_ids[] = {
65 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
66 SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
67 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
68 SDIO_DEVICE_ID_MARVELL_8688_WLAN) },
69 { /* end: all zeroes */ },
72 MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
74 #define MODEL_8385 0x04
75 #define MODEL_8686 0x0b
76 #define MODEL_8688 0x10
78 static const struct lbs_fw_table fw_table[] = {
79 { MODEL_8385, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
80 { MODEL_8385, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
81 { MODEL_8686, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
82 { MODEL_8686, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
83 { MODEL_8686, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
84 { MODEL_8688, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
85 { MODEL_8688, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
90 struct if_sdio_packet {
91 struct if_sdio_packet *next;
93 u8 buffer[] __aligned(4);
97 struct sdio_func *func;
98 struct lbs_private *priv;
101 unsigned long ioport;
102 unsigned int scratch_reg;
104 wait_queue_head_t pwron_waitq;
106 u8 buffer[65536] __attribute__((aligned(4)));
109 struct if_sdio_packet *packets;
111 struct workqueue_struct *workqueue;
112 struct work_struct packet_worker;
117 static void if_sdio_finish_power_on(struct if_sdio_card *card);
118 static int if_sdio_power_off(struct if_sdio_card *card);
120 /********************************************************************/
122 /********************************************************************/
125 * For SD8385/SD8686, this function reads firmware status after
126 * the image is downloaded, or reads RX packet length when
127 * interrupt (with IF_SDIO_H_INT_UPLD bit set) is received.
128 * For SD8688, this function reads firmware status only.
130 static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
135 scratch = sdio_readb(card->func, card->scratch_reg, &ret);
137 scratch |= sdio_readb(card->func, card->scratch_reg + 1,
149 static u8 if_sdio_read_rx_unit(struct if_sdio_card *card)
154 rx_unit = sdio_readb(card->func, IF_SDIO_RX_UNIT, &ret);
162 static u16 if_sdio_read_rx_len(struct if_sdio_card *card, int *err)
167 switch (card->model) {
170 rx_len = if_sdio_read_scratch(card, &ret);
173 default: /* for newer chipsets */
174 rx_len = sdio_readb(card->func, IF_SDIO_RX_LEN, &ret);
176 rx_len <<= card->rx_unit;
178 rx_len = 0xffff; /* invalid length */
189 static int if_sdio_handle_cmd(struct if_sdio_card *card,
190 u8 *buffer, unsigned size)
192 struct lbs_private *priv = card->priv;
197 if (size > LBS_CMD_BUFFER_SIZE) {
198 lbs_deb_sdio("response packet too large (%d bytes)\n",
204 spin_lock_irqsave(&priv->driver_lock, flags);
206 i = (priv->resp_idx == 0) ? 1 : 0;
207 BUG_ON(priv->resp_len[i]);
208 priv->resp_len[i] = size;
209 memcpy(priv->resp_buf[i], buffer, size);
210 lbs_notify_command_response(priv, i);
212 spin_unlock_irqrestore(&priv->driver_lock, flags);
220 static int if_sdio_handle_data(struct if_sdio_card *card,
221 u8 *buffer, unsigned size)
226 if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
227 lbs_deb_sdio("response packet too large (%d bytes)\n",
233 skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
239 skb_reserve(skb, NET_IP_ALIGN);
241 skb_put_data(skb, buffer, size);
243 lbs_process_rxed_packet(card->priv, skb);
251 static int if_sdio_handle_event(struct if_sdio_card *card,
252 u8 *buffer, unsigned size)
257 if (card->model == MODEL_8385) {
258 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
262 /* right shift 3 bits to get the event id */
266 lbs_deb_sdio("event packet too small (%d bytes)\n",
271 event = buffer[3] << 24;
272 event |= buffer[2] << 16;
273 event |= buffer[1] << 8;
274 event |= buffer[0] << 0;
277 lbs_queue_event(card->priv, event & 0xFF);
284 static int if_sdio_wait_status(struct if_sdio_card *card, const u8 condition)
287 unsigned long timeout;
290 timeout = jiffies + HZ;
292 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
295 if ((status & condition) == condition)
297 if (time_after(jiffies, timeout))
304 static int if_sdio_card_to_host(struct if_sdio_card *card)
307 u16 size, type, chunk;
309 size = if_sdio_read_rx_len(card, &ret);
314 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
320 ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY);
325 * The transfer must be in one transaction or the firmware
326 * goes suicidal. There's no way to guarantee that for all
327 * controllers, but we can at least try.
329 chunk = sdio_align_size(card->func, size);
331 ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
335 chunk = card->buffer[0] | (card->buffer[1] << 8);
336 type = card->buffer[2] | (card->buffer[3] << 8);
338 lbs_deb_sdio("packet of type %d and size %d bytes\n",
339 (int)type, (int)chunk);
342 lbs_deb_sdio("packet fragment (%d > %d)\n",
343 (int)chunk, (int)size);
349 lbs_deb_sdio("packet fragment (%d < %d)\n",
350 (int)chunk, (int)size);
355 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
360 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
365 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
370 lbs_deb_sdio("invalid type (%d) from firmware\n",
378 pr_err("problem fetching packet from firmware\n");
383 static void if_sdio_host_to_card_worker(struct work_struct *work)
385 struct if_sdio_card *card;
386 struct if_sdio_packet *packet;
390 card = container_of(work, struct if_sdio_card, packet_worker);
393 spin_lock_irqsave(&card->lock, flags);
394 packet = card->packets;
396 card->packets = packet->next;
397 spin_unlock_irqrestore(&card->lock, flags);
402 sdio_claim_host(card->func);
404 ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY);
406 ret = sdio_writesb(card->func, card->ioport,
407 packet->buffer, packet->nb);
411 pr_err("error %d sending packet to firmware\n", ret);
413 sdio_release_host(card->func);
419 /********************************************************************/
421 /********************************************************************/
423 #define FW_DL_READY_STATUS (IF_SDIO_IO_RDY | IF_SDIO_DL_RDY)
425 static int if_sdio_prog_helper(struct if_sdio_card *card,
426 const struct firmware *fw)
429 unsigned long timeout;
435 chunk_buffer = kzalloc(64, GFP_KERNEL);
441 sdio_claim_host(card->func);
443 ret = sdio_set_block_size(card->func, 32);
451 ret = if_sdio_wait_status(card, FW_DL_READY_STATUS);
455 /* On some platforms (like Davinci) the chip needs more time
456 * between helper blocks.
460 chunk_size = min_t(size_t, size, 60);
462 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
463 memcpy(chunk_buffer + 4, firmware, chunk_size);
465 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
467 ret = sdio_writesb(card->func, card->ioport,
472 firmware += chunk_size;
476 /* an empty block marks the end of the transfer */
477 memset(chunk_buffer, 0, 4);
478 ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
482 lbs_deb_sdio("waiting for helper to boot...\n");
484 /* wait for the helper to boot by looking at the size register */
485 timeout = jiffies + HZ;
489 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
493 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
500 if (time_after(jiffies, timeout)) {
511 sdio_release_host(card->func);
516 pr_err("failed to load helper firmware\n");
521 static int if_sdio_prog_real(struct if_sdio_card *card,
522 const struct firmware *fw)
525 unsigned long timeout;
529 size_t size, req_size;
531 chunk_buffer = kzalloc(512, GFP_KERNEL);
537 sdio_claim_host(card->func);
539 ret = sdio_set_block_size(card->func, 32);
547 timeout = jiffies + HZ;
549 ret = if_sdio_wait_status(card, FW_DL_READY_STATUS);
553 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE,
558 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1,
564 * For SD8688 wait until the length is not 0, 1 or 2
565 * before downloading the first FW block,
566 * since BOOT code writes the register to indicate the
567 * helper/FW download winner,
568 * the value could be 1 or 2 (Func1 or Func2).
570 if ((size != fw->size) || (req_size > 2))
572 if (time_after(jiffies, timeout)) {
580 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
583 lbs_deb_sdio("firmware helper gave up early\n");
588 if (req_size & 0x01) {
589 lbs_deb_sdio("firmware helper signalled error\n");
598 chunk_size = min_t(size_t, req_size, 512);
600 memcpy(chunk_buffer, firmware, chunk_size);
602 lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
603 chunk_size, (chunk_size + 31) / 32 * 32);
605 ret = sdio_writesb(card->func, card->ioport,
606 chunk_buffer, roundup(chunk_size, 32));
610 firmware += chunk_size;
612 req_size -= chunk_size;
618 lbs_deb_sdio("waiting for firmware to boot...\n");
620 /* wait for the firmware to boot */
621 timeout = jiffies + HZ;
625 scratch = if_sdio_read_scratch(card, &ret);
629 if (scratch == IF_SDIO_FIRMWARE_OK)
632 if (time_after(jiffies, timeout)) {
643 sdio_release_host(card->func);
648 pr_err("failed to load firmware\n");
653 static void if_sdio_do_prog_firmware(struct lbs_private *priv, int ret,
654 const struct firmware *helper,
655 const struct firmware *mainfw)
657 struct if_sdio_card *card = priv->card;
660 pr_err("failed to find firmware (%d)\n", ret);
664 ret = if_sdio_prog_helper(card, helper);
668 lbs_deb_sdio("Helper firmware loaded\n");
670 ret = if_sdio_prog_real(card, mainfw);
674 lbs_deb_sdio("Firmware loaded\n");
675 if_sdio_finish_power_on(card);
678 static int if_sdio_prog_firmware(struct if_sdio_card *card)
686 sdio_claim_host(card->func);
687 sdio_writeb(card->func, 0x00, IF_SDIO_H_INT_MASK, &ret);
688 sdio_release_host(card->func);
690 sdio_claim_host(card->func);
691 scratch = if_sdio_read_scratch(card, &ret);
692 sdio_release_host(card->func);
694 lbs_deb_sdio("firmware status = %#x\n", scratch);
695 lbs_deb_sdio("scratch ret = %d\n", ret);
702 * The manual clearly describes that FEDC is the right code to use
703 * to detect firmware presence, but for SD8686 it is not that simple.
704 * Scratch is also used to store the RX packet length, so we lose
705 * the FEDC value early on. So we use a non-zero check in order
706 * to validate firmware presence.
707 * Additionally, the SD8686 in the Gumstix always has the high scratch
708 * bit set, even when the firmware is not loaded. So we have to
709 * exclude that from the test.
711 if (scratch == IF_SDIO_FIRMWARE_OK) {
712 lbs_deb_sdio("firmware already loaded\n");
713 if_sdio_finish_power_on(card);
715 } else if ((card->model == MODEL_8686) && (scratch & 0x7fff)) {
716 lbs_deb_sdio("firmware may be running\n");
717 if_sdio_finish_power_on(card);
721 ret = lbs_get_firmware_async(card->priv, &card->func->dev, card->model,
722 fw_table, if_sdio_do_prog_firmware);
728 /********************************************************************/
729 /* Power management */
730 /********************************************************************/
732 /* Finish power on sequence (after firmware is loaded) */
733 static void if_sdio_finish_power_on(struct if_sdio_card *card)
735 struct sdio_func *func = card->func;
736 struct lbs_private *priv = card->priv;
739 sdio_claim_host(func);
740 sdio_set_block_size(card->func, IF_SDIO_BLOCK_SIZE);
743 * Get rx_unit if the chip is SD8688 or newer.
744 * SD8385 & SD8686 do not have rx_unit.
746 if ((card->model != MODEL_8385)
747 && (card->model != MODEL_8686))
748 card->rx_unit = if_sdio_read_rx_unit(card);
753 * Set up the interrupt handler late.
755 * If we set it up earlier, the (buggy) hardware generates a spurious
756 * interrupt, even before the interrupt has been enabled, with
759 * We register the interrupt handler late so that we can handle any
760 * spurious interrupts, and also to avoid generation of that known
761 * spurious interrupt in the first place.
763 ret = sdio_claim_irq(func, if_sdio_interrupt);
768 * Enable interrupts now that everything is set up
770 sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
774 sdio_release_host(func);
776 /* Set fw_ready before queuing any commands so that
777 * lbs_thread won't block from sending them to firmware.
782 * FUNC_INIT is required for SD8688 WLAN/BT multiple functions
784 if (card->model == MODEL_8688) {
785 struct cmd_header cmd;
787 memset(&cmd, 0, sizeof(cmd));
789 lbs_deb_sdio("send function INIT command\n");
790 if (__lbs_cmd(priv, CMD_FUNC_INIT, &cmd, sizeof(cmd),
791 lbs_cmd_copyback, (unsigned long) &cmd))
792 netdev_alert(priv->dev, "CMD_FUNC_INIT cmd failed\n");
795 wake_up(&card->pwron_waitq);
797 if (!card->started) {
798 ret = lbs_start_card(priv);
799 if_sdio_power_off(card);
801 card->started = true;
802 /* Tell PM core that we don't need the card to be
804 pm_runtime_put(&func->dev);
811 sdio_release_irq(func);
813 sdio_release_host(func);
816 static int if_sdio_power_on(struct if_sdio_card *card)
818 struct sdio_func *func = card->func;
819 struct mmc_host *host = func->card->host;
822 sdio_claim_host(func);
824 ret = sdio_enable_func(func);
828 /* For 1-bit transfers to the 8686 model, we need to enable the
829 * interrupt flag in the CCCR register. Set the MMC_QUIRK_LENIENT_FN0
830 * bit to allow access to non-vendor registers. */
831 if ((card->model == MODEL_8686) &&
832 (host->caps & MMC_CAP_SDIO_IRQ) &&
833 (host->ios.bus_width == MMC_BUS_WIDTH_1)) {
836 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
837 reg = sdio_f0_readb(func, SDIO_CCCR_IF, &ret);
841 reg |= SDIO_BUS_ECSI;
842 sdio_f0_writeb(func, reg, SDIO_CCCR_IF, &ret);
847 card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
851 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
855 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
859 sdio_release_host(func);
860 ret = if_sdio_prog_firmware(card);
862 sdio_claim_host(func);
869 sdio_disable_func(func);
871 sdio_release_host(func);
875 static int if_sdio_power_off(struct if_sdio_card *card)
877 struct sdio_func *func = card->func;
878 struct lbs_private *priv = card->priv;
882 sdio_claim_host(func);
883 sdio_release_irq(func);
884 sdio_disable_func(func);
885 sdio_release_host(func);
890 /*******************************************************************/
891 /* Libertas callbacks */
892 /*******************************************************************/
894 static int if_sdio_host_to_card(struct lbs_private *priv,
895 u8 type, u8 *buf, u16 nb)
898 struct if_sdio_card *card;
899 struct if_sdio_packet *packet, *cur;
905 if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
911 * The transfer must be in one transaction or the firmware
912 * goes suicidal. There's no way to guarantee that for all
913 * controllers, but we can at least try.
915 size = sdio_align_size(card->func, nb + 4);
917 packet = kzalloc(sizeof(struct if_sdio_packet) + size,
928 * SDIO specific header.
930 packet->buffer[0] = (nb + 4) & 0xff;
931 packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
932 packet->buffer[2] = type;
933 packet->buffer[3] = 0;
935 memcpy(packet->buffer + 4, buf, nb);
937 spin_lock_irqsave(&card->lock, flags);
940 card->packets = packet;
950 priv->dnld_sent = DNLD_CMD_SENT;
953 priv->dnld_sent = DNLD_DATA_SENT;
956 lbs_deb_sdio("unknown packet type %d\n", (int)type);
959 spin_unlock_irqrestore(&card->lock, flags);
961 queue_work(card->workqueue, &card->packet_worker);
969 static int if_sdio_enter_deep_sleep(struct lbs_private *priv)
972 struct cmd_header cmd;
974 memset(&cmd, 0, sizeof(cmd));
976 lbs_deb_sdio("send DEEP_SLEEP command\n");
977 ret = __lbs_cmd(priv, CMD_802_11_DEEP_SLEEP, &cmd, sizeof(cmd),
978 lbs_cmd_copyback, (unsigned long) &cmd);
980 netdev_err(priv->dev, "DEEP_SLEEP cmd failed\n");
986 static int if_sdio_exit_deep_sleep(struct lbs_private *priv)
988 struct if_sdio_card *card = priv->card;
991 sdio_claim_host(card->func);
993 sdio_writeb(card->func, HOST_POWER_UP, CONFIGURATION_REG, &ret);
995 netdev_err(priv->dev, "sdio_writeb failed!\n");
997 sdio_release_host(card->func);
1002 static int if_sdio_reset_deep_sleep_wakeup(struct lbs_private *priv)
1004 struct if_sdio_card *card = priv->card;
1007 sdio_claim_host(card->func);
1009 sdio_writeb(card->func, 0, CONFIGURATION_REG, &ret);
1011 netdev_err(priv->dev, "sdio_writeb failed!\n");
1013 sdio_release_host(card->func);
1019 static struct mmc_host *reset_host;
1021 static void if_sdio_reset_card_worker(struct work_struct *work)
1024 * The actual reset operation must be run outside of lbs_thread. This
1025 * is because mmc_remove_host() will cause the device to be instantly
1026 * destroyed, and the libertas driver then needs to end lbs_thread,
1027 * leading to a deadlock.
1029 * We run it in a workqueue totally independent from the if_sdio_card
1030 * instance for that reason.
1033 pr_info("Resetting card...");
1034 mmc_remove_host(reset_host);
1035 mmc_add_host(reset_host);
1037 static DECLARE_WORK(card_reset_work, if_sdio_reset_card_worker);
1039 static void if_sdio_reset_card(struct lbs_private *priv)
1041 struct if_sdio_card *card = priv->card;
1043 if (work_pending(&card_reset_work))
1046 reset_host = card->func->card->host;
1047 schedule_work(&card_reset_work);
1050 static int if_sdio_power_save(struct lbs_private *priv)
1052 struct if_sdio_card *card = priv->card;
1055 flush_workqueue(card->workqueue);
1057 ret = if_sdio_power_off(card);
1059 /* Let runtime PM know the card is powered off */
1060 pm_runtime_put_sync(&card->func->dev);
1065 static int if_sdio_power_restore(struct lbs_private *priv)
1067 struct if_sdio_card *card = priv->card;
1070 /* Make sure the card will not be powered off by runtime PM */
1071 pm_runtime_get_sync(&card->func->dev);
1073 r = if_sdio_power_on(card);
1077 wait_event(card->pwron_waitq, priv->fw_ready);
1082 /*******************************************************************/
1083 /* SDIO callbacks */
1084 /*******************************************************************/
1086 static void if_sdio_interrupt(struct sdio_func *func)
1089 struct if_sdio_card *card;
1092 card = sdio_get_drvdata(func);
1094 cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
1098 lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
1100 sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
1105 * Ignore the define name, this really means the card has
1106 * successfully received the command.
1108 card->priv->is_activity_detected = 1;
1109 if (cause & IF_SDIO_H_INT_DNLD)
1110 lbs_host_to_card_done(card->priv);
1113 if (cause & IF_SDIO_H_INT_UPLD) {
1114 ret = if_sdio_card_to_host(card);
1120 static int if_sdio_probe(struct sdio_func *func,
1121 const struct sdio_device_id *id)
1123 struct if_sdio_card *card;
1124 struct lbs_private *priv;
1127 struct if_sdio_packet *packet;
1129 for (i = 0;i < func->card->num_info;i++) {
1130 if (sscanf(func->card->info[i],
1131 "802.11 SDIO ID: %x", &model) == 1)
1133 if (sscanf(func->card->info[i],
1134 "ID: %x", &model) == 1)
1136 if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
1142 if (i == func->card->num_info) {
1143 pr_err("unable to identify card model\n");
1147 card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
1152 card->model = model;
1154 switch (card->model) {
1156 card->scratch_reg = IF_SDIO_SCRATCH_OLD;
1159 card->scratch_reg = IF_SDIO_SCRATCH;
1162 default: /* for newer chipsets */
1163 card->scratch_reg = IF_SDIO_FW_STATUS;
1167 spin_lock_init(&card->lock);
1168 card->workqueue = alloc_workqueue("libertas_sdio", WQ_MEM_RECLAIM, 0);
1169 if (unlikely(!card->workqueue)) {
1173 INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
1174 init_waitqueue_head(&card->pwron_waitq);
1176 /* Check if we support this card */
1177 for (i = 0; i < ARRAY_SIZE(fw_table); i++) {
1178 if (card->model == fw_table[i].model)
1181 if (i == ARRAY_SIZE(fw_table)) {
1182 pr_err("unknown card model 0x%x\n", card->model);
1187 sdio_set_drvdata(func, card);
1189 lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
1190 "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
1191 func->class, func->vendor, func->device,
1192 model, (unsigned)card->ioport);
1195 priv = lbs_add_card(card, &func->dev);
1197 ret = PTR_ERR(priv);
1204 priv->hw_host_to_card = if_sdio_host_to_card;
1205 priv->enter_deep_sleep = if_sdio_enter_deep_sleep;
1206 priv->exit_deep_sleep = if_sdio_exit_deep_sleep;
1207 priv->reset_deep_sleep_wakeup = if_sdio_reset_deep_sleep_wakeup;
1208 priv->reset_card = if_sdio_reset_card;
1209 priv->power_save = if_sdio_power_save;
1210 priv->power_restore = if_sdio_power_restore;
1211 priv->is_polling = !(func->card->host->caps & MMC_CAP_SDIO_IRQ);
1212 ret = if_sdio_power_on(card);
1214 goto err_activate_card;
1220 flush_workqueue(card->workqueue);
1221 lbs_remove_card(priv);
1223 destroy_workqueue(card->workqueue);
1225 while (card->packets) {
1226 packet = card->packets;
1227 card->packets = card->packets->next;
1236 static void if_sdio_remove(struct sdio_func *func)
1238 struct if_sdio_card *card;
1239 struct if_sdio_packet *packet;
1241 card = sdio_get_drvdata(func);
1243 /* Undo decrement done above in if_sdio_probe */
1244 pm_runtime_get_noresume(&func->dev);
1246 if (user_rmmod && (card->model == MODEL_8688)) {
1248 * FUNC_SHUTDOWN is required for SD8688 WLAN/BT
1249 * multiple functions
1251 struct cmd_header cmd;
1253 memset(&cmd, 0, sizeof(cmd));
1255 lbs_deb_sdio("send function SHUTDOWN command\n");
1256 if (__lbs_cmd(card->priv, CMD_FUNC_SHUTDOWN,
1257 &cmd, sizeof(cmd), lbs_cmd_copyback,
1258 (unsigned long) &cmd))
1259 pr_alert("CMD_FUNC_SHUTDOWN cmd failed\n");
1263 lbs_deb_sdio("call remove card\n");
1264 lbs_stop_card(card->priv);
1265 lbs_remove_card(card->priv);
1267 destroy_workqueue(card->workqueue);
1269 while (card->packets) {
1270 packet = card->packets;
1271 card->packets = card->packets->next;
1278 static int if_sdio_suspend(struct device *dev)
1280 struct sdio_func *func = dev_to_sdio_func(dev);
1281 struct if_sdio_card *card = sdio_get_drvdata(func);
1282 struct lbs_private *priv = card->priv;
1285 mmc_pm_flag_t flags = sdio_get_host_pm_caps(func);
1286 priv->power_up_on_resume = false;
1288 /* If we're powered off anyway, just let the mmc layer remove the
1290 if (!lbs_iface_active(priv)) {
1291 if (priv->fw_ready) {
1292 priv->power_up_on_resume = true;
1293 if_sdio_power_off(card);
1299 dev_info(dev, "%s: suspend: PM flags = 0x%x\n",
1300 sdio_func_id(func), flags);
1302 /* If we aren't being asked to wake on anything, we should bail out
1303 * and let the SD stack power down the card.
1305 if (priv->wol_criteria == EHS_REMOVE_WAKEUP) {
1306 dev_info(dev, "Suspend without wake params -- powering down card\n");
1307 if (priv->fw_ready) {
1308 ret = lbs_suspend(priv);
1312 priv->power_up_on_resume = true;
1313 if_sdio_power_off(card);
1319 if (!(flags & MMC_PM_KEEP_POWER)) {
1320 dev_err(dev, "%s: cannot remain alive while host is suspended\n",
1321 sdio_func_id(func));
1325 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1329 ret = lbs_suspend(priv);
1333 return sdio_set_host_pm_flags(func, MMC_PM_WAKE_SDIO_IRQ);
1336 static int if_sdio_resume(struct device *dev)
1338 struct sdio_func *func = dev_to_sdio_func(dev);
1339 struct if_sdio_card *card = sdio_get_drvdata(func);
1342 dev_info(dev, "%s: resume: we're back\n", sdio_func_id(func));
1344 if (card->priv->power_up_on_resume) {
1345 if_sdio_power_on(card);
1346 wait_event(card->pwron_waitq, card->priv->fw_ready);
1349 ret = lbs_resume(card->priv);
1354 static const struct dev_pm_ops if_sdio_pm_ops = {
1355 .suspend = if_sdio_suspend,
1356 .resume = if_sdio_resume,
1359 static struct sdio_driver if_sdio_driver = {
1360 .name = "libertas_sdio",
1361 .id_table = if_sdio_ids,
1362 .probe = if_sdio_probe,
1363 .remove = if_sdio_remove,
1365 .pm = &if_sdio_pm_ops,
1369 /*******************************************************************/
1370 /* Module functions */
1371 /*******************************************************************/
1373 static int __init if_sdio_init_module(void)
1377 printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1378 printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1380 ret = sdio_register_driver(&if_sdio_driver);
1382 /* Clear the flag in case user removes the card. */
1388 static void __exit if_sdio_exit_module(void)
1390 /* Set the flag as user is removing this module. */
1393 cancel_work_sync(&card_reset_work);
1395 sdio_unregister_driver(&if_sdio_driver);
1398 module_init(if_sdio_init_module);
1399 module_exit(if_sdio_exit_module);
1401 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1402 MODULE_AUTHOR("Pierre Ossman");
1403 MODULE_LICENSE("GPL");