2 * linux/drivers/net/wireless/libertas/if_sdio.c
4 * Copyright 2007-2008 Pierre Ossman
6 * Inspired by if_cs.c, Copyright 2007 Holger Schurig
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or (at
11 * your option) any later version.
13 * This hardware has more or less no CMD53 support, so all registers
14 * must be accessed using sdio_readb()/sdio_writeb().
16 * Transfers must be in one transaction or the firmware goes bonkers.
17 * This means that the transfer must either be small enough to do a
18 * byte based transfer or it must be padded to a multiple of the
21 * As SDIO is still new to the kernel, it is unfortunately common with
22 * bugs in the host controllers related to that. One such bug is that
23 * controllers cannot do transfers that aren't a multiple of 4 bytes.
24 * If you don't have time to fix the host controller driver, you can
25 * work around the problem by modifying if_sdio_host_to_card() and
26 * if_sdio_card_to_host() to pad the data.
29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
31 #include <linux/kernel.h>
32 #include <linux/module.h>
33 #include <linux/slab.h>
34 #include <linux/firmware.h>
35 #include <linux/netdevice.h>
36 #include <linux/delay.h>
37 #include <linux/mmc/card.h>
38 #include <linux/mmc/sdio_func.h>
39 #include <linux/mmc/sdio_ids.h>
40 #include <linux/mmc/sdio.h>
41 #include <linux/mmc/host.h>
42 #include <linux/pm_runtime.h>
51 static void if_sdio_interrupt(struct sdio_func *func);
53 /* The if_sdio_remove() callback function is called when
54 * user removes this module from kernel space or ejects
55 * the card from the slot. The driver handles these 2 cases
56 * differently for SD8688 combo chip.
57 * If the user is removing the module, the FUNC_SHUTDOWN
58 * command for SD8688 is sent to the firmware.
59 * If the card is removed, there is no need to send this command.
61 * The variable 'user_rmmod' is used to distinguish these two
62 * scenarios. This flag is initialized as FALSE in case the card
63 * is removed, and will be set to TRUE for module removal when
64 * module_exit function is called.
68 static const struct sdio_device_id if_sdio_ids[] = {
69 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
70 SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
71 { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL,
72 SDIO_DEVICE_ID_MARVELL_8688WLAN) },
73 { /* end: all zeroes */ },
76 MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
78 #define MODEL_8385 0x04
79 #define MODEL_8686 0x0b
80 #define MODEL_8688 0x10
82 static const struct lbs_fw_table fw_table[] = {
83 { MODEL_8385, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
84 { MODEL_8385, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
85 { MODEL_8686, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
86 { MODEL_8686, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
87 { MODEL_8686, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
88 { MODEL_8688, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
89 { MODEL_8688, "/*(DEBLOBBED)*/", "/*(DEBLOBBED)*/" },
94 struct if_sdio_packet {
95 struct if_sdio_packet *next;
97 u8 buffer[0] __attribute__((aligned(4)));
100 struct if_sdio_card {
101 struct sdio_func *func;
102 struct lbs_private *priv;
105 unsigned long ioport;
106 unsigned int scratch_reg;
108 wait_queue_head_t pwron_waitq;
110 u8 buffer[65536] __attribute__((aligned(4)));
113 struct if_sdio_packet *packets;
115 struct workqueue_struct *workqueue;
116 struct work_struct packet_worker;
121 static void if_sdio_finish_power_on(struct if_sdio_card *card);
122 static int if_sdio_power_off(struct if_sdio_card *card);
124 /********************************************************************/
126 /********************************************************************/
129 * For SD8385/SD8686, this function reads firmware status after
130 * the image is downloaded, or reads RX packet length when
131 * interrupt (with IF_SDIO_H_INT_UPLD bit set) is received.
132 * For SD8688, this function reads firmware status only.
134 static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
139 scratch = sdio_readb(card->func, card->scratch_reg, &ret);
141 scratch |= sdio_readb(card->func, card->scratch_reg + 1,
153 static u8 if_sdio_read_rx_unit(struct if_sdio_card *card)
158 rx_unit = sdio_readb(card->func, IF_SDIO_RX_UNIT, &ret);
166 static u16 if_sdio_read_rx_len(struct if_sdio_card *card, int *err)
171 switch (card->model) {
174 rx_len = if_sdio_read_scratch(card, &ret);
177 default: /* for newer chipsets */
178 rx_len = sdio_readb(card->func, IF_SDIO_RX_LEN, &ret);
180 rx_len <<= card->rx_unit;
182 rx_len = 0xffff; /* invalid length */
193 static int if_sdio_handle_cmd(struct if_sdio_card *card,
194 u8 *buffer, unsigned size)
196 struct lbs_private *priv = card->priv;
201 if (size > LBS_CMD_BUFFER_SIZE) {
202 lbs_deb_sdio("response packet too large (%d bytes)\n",
208 spin_lock_irqsave(&priv->driver_lock, flags);
210 i = (priv->resp_idx == 0) ? 1 : 0;
211 BUG_ON(priv->resp_len[i]);
212 priv->resp_len[i] = size;
213 memcpy(priv->resp_buf[i], buffer, size);
214 lbs_notify_command_response(priv, i);
216 spin_unlock_irqrestore(&priv->driver_lock, flags);
224 static int if_sdio_handle_data(struct if_sdio_card *card,
225 u8 *buffer, unsigned size)
230 if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
231 lbs_deb_sdio("response packet too large (%d bytes)\n",
237 skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE + NET_IP_ALIGN);
243 skb_reserve(skb, NET_IP_ALIGN);
245 skb_put_data(skb, buffer, size);
247 lbs_process_rxed_packet(card->priv, skb);
255 static int if_sdio_handle_event(struct if_sdio_card *card,
256 u8 *buffer, unsigned size)
261 if (card->model == MODEL_8385) {
262 event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
266 /* right shift 3 bits to get the event id */
270 lbs_deb_sdio("event packet too small (%d bytes)\n",
275 event = buffer[3] << 24;
276 event |= buffer[2] << 16;
277 event |= buffer[1] << 8;
278 event |= buffer[0] << 0;
281 lbs_queue_event(card->priv, event & 0xFF);
288 static int if_sdio_wait_status(struct if_sdio_card *card, const u8 condition)
291 unsigned long timeout;
294 timeout = jiffies + HZ;
296 status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
299 if ((status & condition) == condition)
301 if (time_after(jiffies, timeout))
308 static int if_sdio_card_to_host(struct if_sdio_card *card)
311 u16 size, type, chunk;
313 size = if_sdio_read_rx_len(card, &ret);
318 lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
324 ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY);
329 * The transfer must be in one transaction or the firmware
330 * goes suicidal. There's no way to guarantee that for all
331 * controllers, but we can at least try.
333 chunk = sdio_align_size(card->func, size);
335 ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
339 chunk = card->buffer[0] | (card->buffer[1] << 8);
340 type = card->buffer[2] | (card->buffer[3] << 8);
342 lbs_deb_sdio("packet of type %d and size %d bytes\n",
343 (int)type, (int)chunk);
346 lbs_deb_sdio("packet fragment (%d > %d)\n",
347 (int)chunk, (int)size);
353 lbs_deb_sdio("packet fragment (%d < %d)\n",
354 (int)chunk, (int)size);
359 ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
364 ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
369 ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
374 lbs_deb_sdio("invalid type (%d) from firmware\n",
382 pr_err("problem fetching packet from firmware\n");
387 static void if_sdio_host_to_card_worker(struct work_struct *work)
389 struct if_sdio_card *card;
390 struct if_sdio_packet *packet;
394 card = container_of(work, struct if_sdio_card, packet_worker);
397 spin_lock_irqsave(&card->lock, flags);
398 packet = card->packets;
400 card->packets = packet->next;
401 spin_unlock_irqrestore(&card->lock, flags);
406 sdio_claim_host(card->func);
408 ret = if_sdio_wait_status(card, IF_SDIO_IO_RDY);
410 ret = sdio_writesb(card->func, card->ioport,
411 packet->buffer, packet->nb);
415 pr_err("error %d sending packet to firmware\n", ret);
417 sdio_release_host(card->func);
423 /********************************************************************/
425 /********************************************************************/
427 #define FW_DL_READY_STATUS (IF_SDIO_IO_RDY | IF_SDIO_DL_RDY)
429 static int if_sdio_prog_helper(struct if_sdio_card *card,
430 const struct firmware *fw)
433 unsigned long timeout;
439 chunk_buffer = kzalloc(64, GFP_KERNEL);
445 sdio_claim_host(card->func);
447 ret = sdio_set_block_size(card->func, 32);
455 ret = if_sdio_wait_status(card, FW_DL_READY_STATUS);
459 /* On some platforms (like Davinci) the chip needs more time
460 * between helper blocks.
464 chunk_size = min_t(size_t, size, 60);
466 *((__le32*)chunk_buffer) = cpu_to_le32(chunk_size);
467 memcpy(chunk_buffer + 4, firmware, chunk_size);
469 lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
471 ret = sdio_writesb(card->func, card->ioport,
476 firmware += chunk_size;
480 /* an empty block marks the end of the transfer */
481 memset(chunk_buffer, 0, 4);
482 ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
486 lbs_deb_sdio("waiting for helper to boot...\n");
488 /* wait for the helper to boot by looking at the size register */
489 timeout = jiffies + HZ;
493 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
497 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
504 if (time_after(jiffies, timeout)) {
515 sdio_release_host(card->func);
520 pr_err("failed to load helper firmware\n");
525 static int if_sdio_prog_real(struct if_sdio_card *card,
526 const struct firmware *fw)
529 unsigned long timeout;
533 size_t size, req_size;
535 chunk_buffer = kzalloc(512, GFP_KERNEL);
541 sdio_claim_host(card->func);
543 ret = sdio_set_block_size(card->func, 32);
551 timeout = jiffies + HZ;
553 ret = if_sdio_wait_status(card, FW_DL_READY_STATUS);
557 req_size = sdio_readb(card->func, IF_SDIO_RD_BASE,
562 req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1,
568 * For SD8688 wait until the length is not 0, 1 or 2
569 * before downloading the first FW block,
570 * since BOOT code writes the register to indicate the
571 * helper/FW download winner,
572 * the value could be 1 or 2 (Func1 or Func2).
574 if ((size != fw->size) || (req_size > 2))
576 if (time_after(jiffies, timeout)) {
584 lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
587 lbs_deb_sdio("firmware helper gave up early\n");
592 if (req_size & 0x01) {
593 lbs_deb_sdio("firmware helper signalled error\n");
602 chunk_size = min_t(size_t, req_size, 512);
604 memcpy(chunk_buffer, firmware, chunk_size);
606 lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
607 chunk_size, (chunk_size + 31) / 32 * 32);
609 ret = sdio_writesb(card->func, card->ioport,
610 chunk_buffer, roundup(chunk_size, 32));
614 firmware += chunk_size;
616 req_size -= chunk_size;
622 lbs_deb_sdio("waiting for firmware to boot...\n");
624 /* wait for the firmware to boot */
625 timeout = jiffies + HZ;
629 scratch = if_sdio_read_scratch(card, &ret);
633 if (scratch == IF_SDIO_FIRMWARE_OK)
636 if (time_after(jiffies, timeout)) {
647 sdio_release_host(card->func);
652 pr_err("failed to load firmware\n");
657 static void if_sdio_do_prog_firmware(struct lbs_private *priv, int ret,
658 const struct firmware *helper,
659 const struct firmware *mainfw)
661 struct if_sdio_card *card = priv->card;
664 pr_err("failed to find firmware (%d)\n", ret);
668 ret = if_sdio_prog_helper(card, helper);
672 lbs_deb_sdio("Helper firmware loaded\n");
674 ret = if_sdio_prog_real(card, mainfw);
678 lbs_deb_sdio("Firmware loaded\n");
679 if_sdio_finish_power_on(card);
682 static int if_sdio_prog_firmware(struct if_sdio_card *card)
690 sdio_claim_host(card->func);
691 sdio_writeb(card->func, 0x00, IF_SDIO_H_INT_MASK, &ret);
692 sdio_release_host(card->func);
694 sdio_claim_host(card->func);
695 scratch = if_sdio_read_scratch(card, &ret);
696 sdio_release_host(card->func);
698 lbs_deb_sdio("firmware status = %#x\n", scratch);
699 lbs_deb_sdio("scratch ret = %d\n", ret);
706 * The manual clearly describes that FEDC is the right code to use
707 * to detect firmware presence, but for SD8686 it is not that simple.
708 * Scratch is also used to store the RX packet length, so we lose
709 * the FEDC value early on. So we use a non-zero check in order
710 * to validate firmware presence.
711 * Additionally, the SD8686 in the Gumstix always has the high scratch
712 * bit set, even when the firmware is not loaded. So we have to
713 * exclude that from the test.
715 if (scratch == IF_SDIO_FIRMWARE_OK) {
716 lbs_deb_sdio("firmware already loaded\n");
717 if_sdio_finish_power_on(card);
719 } else if ((card->model == MODEL_8686) && (scratch & 0x7fff)) {
720 lbs_deb_sdio("firmware may be running\n");
721 if_sdio_finish_power_on(card);
725 ret = lbs_get_firmware_async(card->priv, &card->func->dev, card->model,
726 fw_table, if_sdio_do_prog_firmware);
732 /********************************************************************/
733 /* Power management */
734 /********************************************************************/
736 /* Finish power on sequence (after firmware is loaded) */
737 static void if_sdio_finish_power_on(struct if_sdio_card *card)
739 struct sdio_func *func = card->func;
740 struct lbs_private *priv = card->priv;
743 sdio_claim_host(func);
744 sdio_set_block_size(card->func, IF_SDIO_BLOCK_SIZE);
747 * Get rx_unit if the chip is SD8688 or newer.
748 * SD8385 & SD8686 do not have rx_unit.
750 if ((card->model != MODEL_8385)
751 && (card->model != MODEL_8686))
752 card->rx_unit = if_sdio_read_rx_unit(card);
757 * Set up the interrupt handler late.
759 * If we set it up earlier, the (buggy) hardware generates a spurious
760 * interrupt, even before the interrupt has been enabled, with
763 * We register the interrupt handler late so that we can handle any
764 * spurious interrupts, and also to avoid generation of that known
765 * spurious interrupt in the first place.
767 ret = sdio_claim_irq(func, if_sdio_interrupt);
772 * Enable interrupts now that everything is set up
774 sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
778 sdio_release_host(func);
780 /* Set fw_ready before queuing any commands so that
781 * lbs_thread won't block from sending them to firmware.
786 * FUNC_INIT is required for SD8688 WLAN/BT multiple functions
788 if (card->model == MODEL_8688) {
789 struct cmd_header cmd;
791 memset(&cmd, 0, sizeof(cmd));
793 lbs_deb_sdio("send function INIT command\n");
794 if (__lbs_cmd(priv, CMD_FUNC_INIT, &cmd, sizeof(cmd),
795 lbs_cmd_copyback, (unsigned long) &cmd))
796 netdev_alert(priv->dev, "CMD_FUNC_INIT cmd failed\n");
799 wake_up(&card->pwron_waitq);
801 if (!card->started) {
802 ret = lbs_start_card(priv);
803 if_sdio_power_off(card);
805 card->started = true;
806 /* Tell PM core that we don't need the card to be
808 pm_runtime_put(&func->dev);
815 sdio_release_irq(func);
817 sdio_release_host(func);
820 static int if_sdio_power_on(struct if_sdio_card *card)
822 struct sdio_func *func = card->func;
823 struct mmc_host *host = func->card->host;
826 sdio_claim_host(func);
828 ret = sdio_enable_func(func);
832 /* For 1-bit transfers to the 8686 model, we need to enable the
833 * interrupt flag in the CCCR register. Set the MMC_QUIRK_LENIENT_FN0
834 * bit to allow access to non-vendor registers. */
835 if ((card->model == MODEL_8686) &&
836 (host->caps & MMC_CAP_SDIO_IRQ) &&
837 (host->ios.bus_width == MMC_BUS_WIDTH_1)) {
840 func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
841 reg = sdio_f0_readb(func, SDIO_CCCR_IF, &ret);
845 reg |= SDIO_BUS_ECSI;
846 sdio_f0_writeb(func, reg, SDIO_CCCR_IF, &ret);
851 card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
855 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
859 card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
863 sdio_release_host(func);
864 ret = if_sdio_prog_firmware(card);
866 sdio_claim_host(func);
873 sdio_disable_func(func);
875 sdio_release_host(func);
879 static int if_sdio_power_off(struct if_sdio_card *card)
881 struct sdio_func *func = card->func;
882 struct lbs_private *priv = card->priv;
886 sdio_claim_host(func);
887 sdio_release_irq(func);
888 sdio_disable_func(func);
889 sdio_release_host(func);
894 /*******************************************************************/
895 /* Libertas callbacks */
896 /*******************************************************************/
898 static int if_sdio_host_to_card(struct lbs_private *priv,
899 u8 type, u8 *buf, u16 nb)
902 struct if_sdio_card *card;
903 struct if_sdio_packet *packet, *cur;
909 if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
915 * The transfer must be in one transaction or the firmware
916 * goes suicidal. There's no way to guarantee that for all
917 * controllers, but we can at least try.
919 size = sdio_align_size(card->func, nb + 4);
921 packet = kzalloc(sizeof(struct if_sdio_packet) + size,
932 * SDIO specific header.
934 packet->buffer[0] = (nb + 4) & 0xff;
935 packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
936 packet->buffer[2] = type;
937 packet->buffer[3] = 0;
939 memcpy(packet->buffer + 4, buf, nb);
941 spin_lock_irqsave(&card->lock, flags);
944 card->packets = packet;
954 priv->dnld_sent = DNLD_CMD_SENT;
957 priv->dnld_sent = DNLD_DATA_SENT;
960 lbs_deb_sdio("unknown packet type %d\n", (int)type);
963 spin_unlock_irqrestore(&card->lock, flags);
965 queue_work(card->workqueue, &card->packet_worker);
973 static int if_sdio_enter_deep_sleep(struct lbs_private *priv)
976 struct cmd_header cmd;
978 memset(&cmd, 0, sizeof(cmd));
980 lbs_deb_sdio("send DEEP_SLEEP command\n");
981 ret = __lbs_cmd(priv, CMD_802_11_DEEP_SLEEP, &cmd, sizeof(cmd),
982 lbs_cmd_copyback, (unsigned long) &cmd);
984 netdev_err(priv->dev, "DEEP_SLEEP cmd failed\n");
990 static int if_sdio_exit_deep_sleep(struct lbs_private *priv)
992 struct if_sdio_card *card = priv->card;
995 sdio_claim_host(card->func);
997 sdio_writeb(card->func, HOST_POWER_UP, CONFIGURATION_REG, &ret);
999 netdev_err(priv->dev, "sdio_writeb failed!\n");
1001 sdio_release_host(card->func);
1006 static int if_sdio_reset_deep_sleep_wakeup(struct lbs_private *priv)
1008 struct if_sdio_card *card = priv->card;
1011 sdio_claim_host(card->func);
1013 sdio_writeb(card->func, 0, CONFIGURATION_REG, &ret);
1015 netdev_err(priv->dev, "sdio_writeb failed!\n");
1017 sdio_release_host(card->func);
1023 static struct mmc_host *reset_host;
1025 static void if_sdio_reset_card_worker(struct work_struct *work)
1028 * The actual reset operation must be run outside of lbs_thread. This
1029 * is because mmc_remove_host() will cause the device to be instantly
1030 * destroyed, and the libertas driver then needs to end lbs_thread,
1031 * leading to a deadlock.
1033 * We run it in a workqueue totally independent from the if_sdio_card
1034 * instance for that reason.
1037 pr_info("Resetting card...");
1038 mmc_remove_host(reset_host);
1039 mmc_add_host(reset_host);
1041 static DECLARE_WORK(card_reset_work, if_sdio_reset_card_worker);
1043 static void if_sdio_reset_card(struct lbs_private *priv)
1045 struct if_sdio_card *card = priv->card;
1047 if (work_pending(&card_reset_work))
1050 reset_host = card->func->card->host;
1051 schedule_work(&card_reset_work);
1054 static int if_sdio_power_save(struct lbs_private *priv)
1056 struct if_sdio_card *card = priv->card;
1059 flush_workqueue(card->workqueue);
1061 ret = if_sdio_power_off(card);
1063 /* Let runtime PM know the card is powered off */
1064 pm_runtime_put_sync(&card->func->dev);
1069 static int if_sdio_power_restore(struct lbs_private *priv)
1071 struct if_sdio_card *card = priv->card;
1074 /* Make sure the card will not be powered off by runtime PM */
1075 pm_runtime_get_sync(&card->func->dev);
1077 r = if_sdio_power_on(card);
1081 wait_event(card->pwron_waitq, priv->fw_ready);
1086 /*******************************************************************/
1087 /* SDIO callbacks */
1088 /*******************************************************************/
1090 static void if_sdio_interrupt(struct sdio_func *func)
1093 struct if_sdio_card *card;
1096 card = sdio_get_drvdata(func);
1098 cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
1102 lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
1104 sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
1109 * Ignore the define name, this really means the card has
1110 * successfully received the command.
1112 card->priv->is_activity_detected = 1;
1113 if (cause & IF_SDIO_H_INT_DNLD)
1114 lbs_host_to_card_done(card->priv);
1117 if (cause & IF_SDIO_H_INT_UPLD) {
1118 ret = if_sdio_card_to_host(card);
1124 static int if_sdio_probe(struct sdio_func *func,
1125 const struct sdio_device_id *id)
1127 struct if_sdio_card *card;
1128 struct lbs_private *priv;
1131 struct if_sdio_packet *packet;
1133 for (i = 0;i < func->card->num_info;i++) {
1134 if (sscanf(func->card->info[i],
1135 "802.11 SDIO ID: %x", &model) == 1)
1137 if (sscanf(func->card->info[i],
1138 "ID: %x", &model) == 1)
1140 if (!strcmp(func->card->info[i], "IBIS Wireless SDIO Card")) {
1146 if (i == func->card->num_info) {
1147 pr_err("unable to identify card model\n");
1151 card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
1156 card->model = model;
1158 switch (card->model) {
1160 card->scratch_reg = IF_SDIO_SCRATCH_OLD;
1163 card->scratch_reg = IF_SDIO_SCRATCH;
1166 default: /* for newer chipsets */
1167 card->scratch_reg = IF_SDIO_FW_STATUS;
1171 spin_lock_init(&card->lock);
1172 card->workqueue = alloc_workqueue("libertas_sdio", WQ_MEM_RECLAIM, 0);
1173 if (unlikely(!card->workqueue)) {
1177 INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
1178 init_waitqueue_head(&card->pwron_waitq);
1180 /* Check if we support this card */
1181 for (i = 0; i < ARRAY_SIZE(fw_table); i++) {
1182 if (card->model == fw_table[i].model)
1185 if (i == ARRAY_SIZE(fw_table)) {
1186 pr_err("unknown card model 0x%x\n", card->model);
1191 sdio_set_drvdata(func, card);
1193 lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
1194 "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
1195 func->class, func->vendor, func->device,
1196 model, (unsigned)card->ioport);
1199 priv = lbs_add_card(card, &func->dev);
1208 priv->hw_host_to_card = if_sdio_host_to_card;
1209 priv->enter_deep_sleep = if_sdio_enter_deep_sleep;
1210 priv->exit_deep_sleep = if_sdio_exit_deep_sleep;
1211 priv->reset_deep_sleep_wakeup = if_sdio_reset_deep_sleep_wakeup;
1212 priv->reset_card = if_sdio_reset_card;
1213 priv->power_save = if_sdio_power_save;
1214 priv->power_restore = if_sdio_power_restore;
1215 priv->is_polling = !(func->card->host->caps & MMC_CAP_SDIO_IRQ);
1216 ret = if_sdio_power_on(card);
1218 goto err_activate_card;
1224 flush_workqueue(card->workqueue);
1225 lbs_remove_card(priv);
1227 destroy_workqueue(card->workqueue);
1229 while (card->packets) {
1230 packet = card->packets;
1231 card->packets = card->packets->next;
1240 static void if_sdio_remove(struct sdio_func *func)
1242 struct if_sdio_card *card;
1243 struct if_sdio_packet *packet;
1245 card = sdio_get_drvdata(func);
1247 /* Undo decrement done above in if_sdio_probe */
1248 pm_runtime_get_noresume(&func->dev);
1250 if (user_rmmod && (card->model == MODEL_8688)) {
1252 * FUNC_SHUTDOWN is required for SD8688 WLAN/BT
1253 * multiple functions
1255 struct cmd_header cmd;
1257 memset(&cmd, 0, sizeof(cmd));
1259 lbs_deb_sdio("send function SHUTDOWN command\n");
1260 if (__lbs_cmd(card->priv, CMD_FUNC_SHUTDOWN,
1261 &cmd, sizeof(cmd), lbs_cmd_copyback,
1262 (unsigned long) &cmd))
1263 pr_alert("CMD_FUNC_SHUTDOWN cmd failed\n");
1267 lbs_deb_sdio("call remove card\n");
1268 lbs_stop_card(card->priv);
1269 lbs_remove_card(card->priv);
1271 destroy_workqueue(card->workqueue);
1273 while (card->packets) {
1274 packet = card->packets;
1275 card->packets = card->packets->next;
1282 static int if_sdio_suspend(struct device *dev)
1284 struct sdio_func *func = dev_to_sdio_func(dev);
1285 struct if_sdio_card *card = sdio_get_drvdata(func);
1286 struct lbs_private *priv = card->priv;
1289 mmc_pm_flag_t flags = sdio_get_host_pm_caps(func);
1290 priv->power_up_on_resume = false;
1292 /* If we're powered off anyway, just let the mmc layer remove the
1294 if (!lbs_iface_active(priv)) {
1295 if (priv->fw_ready) {
1296 priv->power_up_on_resume = true;
1297 if_sdio_power_off(card);
1303 dev_info(dev, "%s: suspend: PM flags = 0x%x\n",
1304 sdio_func_id(func), flags);
1306 /* If we aren't being asked to wake on anything, we should bail out
1307 * and let the SD stack power down the card.
1309 if (priv->wol_criteria == EHS_REMOVE_WAKEUP) {
1310 dev_info(dev, "Suspend without wake params -- powering down card\n");
1311 if (priv->fw_ready) {
1312 ret = lbs_suspend(priv);
1316 priv->power_up_on_resume = true;
1317 if_sdio_power_off(card);
1323 if (!(flags & MMC_PM_KEEP_POWER)) {
1324 dev_err(dev, "%s: cannot remain alive while host is suspended\n",
1325 sdio_func_id(func));
1329 ret = sdio_set_host_pm_flags(func, MMC_PM_KEEP_POWER);
1333 ret = lbs_suspend(priv);
1337 return sdio_set_host_pm_flags(func, MMC_PM_WAKE_SDIO_IRQ);
1340 static int if_sdio_resume(struct device *dev)
1342 struct sdio_func *func = dev_to_sdio_func(dev);
1343 struct if_sdio_card *card = sdio_get_drvdata(func);
1346 dev_info(dev, "%s: resume: we're back\n", sdio_func_id(func));
1348 if (card->priv->power_up_on_resume) {
1349 if_sdio_power_on(card);
1350 wait_event(card->pwron_waitq, card->priv->fw_ready);
1353 ret = lbs_resume(card->priv);
1358 static const struct dev_pm_ops if_sdio_pm_ops = {
1359 .suspend = if_sdio_suspend,
1360 .resume = if_sdio_resume,
1363 static struct sdio_driver if_sdio_driver = {
1364 .name = "libertas_sdio",
1365 .id_table = if_sdio_ids,
1366 .probe = if_sdio_probe,
1367 .remove = if_sdio_remove,
1369 .pm = &if_sdio_pm_ops,
1373 /*******************************************************************/
1374 /* Module functions */
1375 /*******************************************************************/
1377 static int __init if_sdio_init_module(void)
1381 printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
1382 printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
1384 ret = sdio_register_driver(&if_sdio_driver);
1386 /* Clear the flag in case user removes the card. */
1392 static void __exit if_sdio_exit_module(void)
1394 /* Set the flag as user is removing this module. */
1397 cancel_work_sync(&card_reset_work);
1399 sdio_unregister_driver(&if_sdio_driver);
1402 module_init(if_sdio_init_module);
1403 module_exit(if_sdio_exit_module);
1405 MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
1406 MODULE_AUTHOR("Pierre Ossman");
1407 MODULE_LICENSE("GPL");