--- /dev/null
+/*
+ * linux/drivers/net/wireless/libertas/if_sdio.c
+ *
+ * Copyright 2007 Pierre Ossman
+ *
+ * Inspired by if_cs.c, Copyright 2007 Holger Schurig
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This hardware has more or less no CMD53 support, so all registers
+ * must be accessed using sdio_readb()/sdio_writeb().
+ *
+ * Transfers must be in one transaction or the firmware goes bonkers.
+ * This means that the transfer must either be small enough to do a
+ * byte based transfer or it must be padded to a multiple of the
+ * current block size.
+ *
+ * As SDIO is still new to the kernel, it is unfortunately common with
+ * bugs in the host controllers related to that. One such bug is that
+ * controllers cannot do transfers that aren't a multiple of 4 bytes.
+ * If you don't have time to fix the host controller driver, you can
+ * work around the problem by modifying if_sdio_host_to_card() and
+ * if_sdio_card_to_host() to pad the data.
+ */
+
+#include <linux/moduleparam.h>
+#include <linux/firmware.h>
+#include <linux/netdevice.h>
+#include <linux/delay.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+
+#include "host.h"
+#include "decl.h"
+#include "defs.h"
+#include "dev.h"
+#include "if_sdio.h"
+
+static char *libertas_helper_name = NULL;
+module_param_named(helper_name, libertas_helper_name, charp, 0644);
+
+static char *libertas_fw_name = NULL;
+module_param_named(fw_name, libertas_fw_name, charp, 0644);
+
+static const struct sdio_device_id if_sdio_ids[] = {
+ { SDIO_DEVICE(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_LIBERTAS) },
+ { /* end: all zeroes */ },
+};
+
+MODULE_DEVICE_TABLE(sdio, if_sdio_ids);
+
+struct if_sdio_model {
+ int model;
+ const char *helper;
+ const char *firmware;
+};
+
+static struct if_sdio_model if_sdio_models[] = {
+ {
+ /* 8385 */
+ .model = 0x04,
+ .helper = "sd8385_helper.bin",
+ .firmware = "sd8385.bin",
+ },
+ {
+ /* 8686 */
+ .model = 0x0B,
+ .helper = "sd8686_helper.bin",
+ .firmware = "sd8686.bin",
+ },
+};
+
+struct if_sdio_packet {
+ struct if_sdio_packet *next;
+ u16 nb;
+ u8 buffer[0] __attribute__((aligned(4)));
+};
+
+struct if_sdio_card {
+ struct sdio_func *func;
+ wlan_private *priv;
+
+ int model;
+ unsigned long ioport;
+
+ const char *helper;
+ const char *firmware;
+
+ u8 buffer[65536];
+ u8 int_cause;
+ u32 event;
+
+ spinlock_t lock;
+ struct if_sdio_packet *packets;
+ struct work_struct packet_worker;
+};
+
+/********************************************************************/
+/* I/O */
+/********************************************************************/
+
+static u16 if_sdio_read_scratch(struct if_sdio_card *card, int *err)
+{
+ int ret, reg;
+ u16 scratch;
+
+ if (card->model == 0x04)
+ reg = IF_SDIO_SCRATCH_OLD;
+ else
+ reg = IF_SDIO_SCRATCH;
+
+ scratch = sdio_readb(card->func, reg, &ret);
+ if (!ret)
+ scratch |= sdio_readb(card->func, reg + 1, &ret) << 8;
+
+ if (err)
+ *err = ret;
+
+ if (ret)
+ return 0xffff;
+
+ return scratch;
+}
+
+static int if_sdio_handle_cmd(struct if_sdio_card *card,
+ u8 *buffer, unsigned size)
+{
+ int ret;
+ unsigned long flags;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ spin_lock_irqsave(&card->priv->adapter->driver_lock, flags);
+
+ if (!card->priv->adapter->cur_cmd) {
+ lbs_deb_sdio("discarding spurious response\n");
+ ret = 0;
+ goto out;
+ }
+
+ if (size > MRVDRV_SIZE_OF_CMD_BUFFER) {
+ lbs_deb_sdio("response packet too large (%d bytes)\n",
+ (int)size);
+ ret = -E2BIG;
+ goto out;
+ }
+
+ memcpy(card->priv->adapter->cur_cmd->bufvirtualaddr, buffer, size);
+ card->priv->upld_len = size;
+
+ card->int_cause |= MRVDRV_CMD_UPLD_RDY;
+
+ libertas_interrupt(card->priv->dev);
+
+ ret = 0;
+
+out:
+ spin_unlock_irqrestore(&card->priv->adapter->driver_lock, flags);
+
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+}
+
+static int if_sdio_handle_data(struct if_sdio_card *card,
+ u8 *buffer, unsigned size)
+{
+ int ret;
+ struct sk_buff *skb;
+ char *data;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ if (size > MRVDRV_ETH_RX_PACKET_BUFFER_SIZE) {
+ lbs_deb_sdio("response packet too large (%d bytes)\n",
+ (int)size);
+ ret = -E2BIG;
+ goto out;
+ }
+
+ skb = dev_alloc_skb(MRVDRV_ETH_RX_PACKET_BUFFER_SIZE);
+ if (!skb) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ data = skb_put(skb, size);
+
+ memcpy(data, buffer, size);
+
+ libertas_process_rxed_packet(card->priv, skb);
+
+ ret = 0;
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+}
+
+static int if_sdio_handle_event(struct if_sdio_card *card,
+ u8 *buffer, unsigned size)
+{
+ int ret;
+ unsigned long flags;
+ u32 event;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ if (card->model == 0x04) {
+ event = sdio_readb(card->func, IF_SDIO_EVENT, &ret);
+ if (ret)
+ goto out;
+ } else {
+ if (size < 4) {
+ lbs_deb_sdio("event packet too small (%d bytes)\n",
+ (int)size);
+ ret = -EINVAL;
+ goto out;
+ }
+ event = buffer[3] << 24;
+ event |= buffer[2] << 16;
+ event |= buffer[1] << 8;
+ event |= buffer[0] << 0;
+ event <<= SBI_EVENT_CAUSE_SHIFT;
+ }
+
+ spin_lock_irqsave(&card->priv->adapter->driver_lock, flags);
+
+ card->event = event;
+ card->int_cause |= MRVDRV_CARDEVENT;
+
+ libertas_interrupt(card->priv->dev);
+
+ spin_unlock_irqrestore(&card->priv->adapter->driver_lock, flags);
+
+ ret = 0;
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+}
+
+static int if_sdio_card_to_host(struct if_sdio_card *card)
+{
+ int ret;
+ u8 status;
+ u16 size, type, chunk;
+ unsigned long timeout;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ size = if_sdio_read_scratch(card, &ret);
+ if (ret)
+ goto out;
+
+ if (size < 4) {
+ lbs_deb_sdio("invalid packet size (%d bytes) from firmware\n",
+ (int)size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ timeout = jiffies + HZ;
+ while (1) {
+ status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
+ if (ret)
+ goto out;
+ if (status & IF_SDIO_IO_RDY)
+ break;
+ if (time_after(jiffies, timeout)) {
+ ret = -ETIMEDOUT;
+ goto out;
+ }
+ mdelay(1);
+ }
+
+ /*
+ * The transfer must be in one transaction or the firmware
+ * goes suicidal.
+ */
+ chunk = size;
+ if ((chunk > card->func->cur_blksize) || (chunk > 512)) {
+ chunk = (chunk + card->func->cur_blksize - 1) /
+ card->func->cur_blksize * card->func->cur_blksize;
+ }
+
+ ret = sdio_readsb(card->func, card->buffer, card->ioport, chunk);
+ if (ret)
+ goto out;
+
+ chunk = card->buffer[0] | (card->buffer[1] << 8);
+ type = card->buffer[2] | (card->buffer[3] << 8);
+
+ lbs_deb_sdio("packet of type %d and size %d bytes\n",
+ (int)type, (int)chunk);
+
+ if (chunk > size) {
+ lbs_deb_sdio("packet fragment (%d > %d)\n",
+ (int)chunk, (int)size);
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (chunk < size) {
+ lbs_deb_sdio("packet fragment (%d < %d)\n",
+ (int)chunk, (int)size);
+ }
+
+ switch (type) {
+ case MVMS_CMD:
+ ret = if_sdio_handle_cmd(card, card->buffer + 4, chunk - 4);
+ if (ret)
+ goto out;
+ break;
+ case MVMS_DAT:
+ ret = if_sdio_handle_data(card, card->buffer + 4, chunk - 4);
+ if (ret)
+ goto out;
+ break;
+ case MVMS_EVENT:
+ ret = if_sdio_handle_event(card, card->buffer + 4, chunk - 4);
+ if (ret)
+ goto out;
+ break;
+ default:
+ lbs_deb_sdio("invalid type (%d) from firmware\n",
+ (int)type);
+ ret = -EINVAL;
+ goto out;
+ }
+
+out:
+ if (ret)
+ lbs_pr_err("problem fetching packet from firmware\n");
+
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+}
+
+static void if_sdio_host_to_card_worker(struct work_struct *work)
+{
+ struct if_sdio_card *card;
+ struct if_sdio_packet *packet;
+ unsigned long timeout;
+ u8 status;
+ int ret;
+ unsigned long flags;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ card = container_of(work, struct if_sdio_card, packet_worker);
+
+ while (1) {
+ spin_lock_irqsave(&card->lock, flags);
+ packet = card->packets;
+ if (packet)
+ card->packets = packet->next;
+ spin_unlock_irqrestore(&card->lock, flags);
+
+ if (!packet)
+ break;
+
+ sdio_claim_host(card->func);
+
+ timeout = jiffies + HZ;
+ while (1) {
+ status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
+ if (ret)
+ goto release;
+ if (status & IF_SDIO_IO_RDY)
+ break;
+ if (time_after(jiffies, timeout)) {
+ ret = -ETIMEDOUT;
+ goto release;
+ }
+ mdelay(1);
+ }
+
+ ret = sdio_writesb(card->func, card->ioport,
+ packet->buffer, packet->nb);
+ if (ret)
+ goto release;
+release:
+ sdio_release_host(card->func);
+
+ kfree(packet);
+ }
+
+ lbs_deb_leave(LBS_DEB_SDIO);
+}
+
+/********************************************************************/
+/* Firmware */
+/********************************************************************/
+
+static int if_sdio_prog_helper(struct if_sdio_card *card)
+{
+ int ret;
+ u8 status;
+ const struct firmware *fw;
+ unsigned long timeout;
+ u8 *chunk_buffer;
+ u32 chunk_size;
+ u8 *firmware;
+ size_t size;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ ret = request_firmware(&fw, card->helper, &card->func->dev);
+ if (ret) {
+ lbs_pr_err("can't load helper firmware\n");
+ goto out;
+ }
+
+ chunk_buffer = kzalloc(64, GFP_KERNEL);
+ if (!chunk_buffer) {
+ ret = -ENOMEM;
+ goto release_fw;
+ }
+
+ sdio_claim_host(card->func);
+
+ ret = sdio_set_block_size(card->func, 32);
+ if (ret)
+ goto release;
+
+ firmware = fw->data;
+ size = fw->size;
+
+ while (size) {
+ timeout = jiffies + HZ;
+ while (1) {
+ status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
+ if (ret)
+ goto release;
+ if ((status & IF_SDIO_IO_RDY) &&
+ (status & IF_SDIO_DL_RDY))
+ break;
+ if (time_after(jiffies, timeout)) {
+ ret = -ETIMEDOUT;
+ goto release;
+ }
+ mdelay(1);
+ }
+
+ chunk_size = min(size, (size_t)60);
+
+ *((u32*)chunk_buffer) = cpu_to_le32(chunk_size);
+ memcpy(chunk_buffer + 4, firmware, chunk_size);
+/*
+ lbs_deb_sdio("sending %d bytes chunk\n", chunk_size);
+*/
+ ret = sdio_writesb(card->func, card->ioport,
+ chunk_buffer, 64);
+ if (ret)
+ goto release;
+
+ firmware += chunk_size;
+ size -= chunk_size;
+ }
+
+ /* an empty block marks the end of the transfer */
+ memset(chunk_buffer, 0, 4);
+ ret = sdio_writesb(card->func, card->ioport, chunk_buffer, 64);
+ if (ret)
+ goto release;
+
+ lbs_deb_sdio("waiting for helper to boot...\n");
+
+ /* wait for the helper to boot by looking at the size register */
+ timeout = jiffies + HZ;
+ while (1) {
+ u16 req_size;
+
+ req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
+ if (ret)
+ goto release;
+
+ req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
+ if (ret)
+ goto release;
+
+ if (req_size != 0)
+ break;
+
+ if (time_after(jiffies, timeout)) {
+ ret = -ETIMEDOUT;
+ goto release;
+ }
+
+ msleep(10);
+ }
+
+ ret = 0;
+
+release:
+ sdio_set_block_size(card->func, 0);
+ sdio_release_host(card->func);
+ kfree(chunk_buffer);
+release_fw:
+ release_firmware(fw);
+
+out:
+ if (ret)
+ lbs_pr_err("failed to load helper firmware\n");
+
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+}
+
+static int if_sdio_prog_real(struct if_sdio_card *card)
+{
+ int ret;
+ u8 status;
+ const struct firmware *fw;
+ unsigned long timeout;
+ u8 *chunk_buffer;
+ u32 chunk_size;
+ u8 *firmware;
+ size_t size, req_size;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ ret = request_firmware(&fw, card->firmware, &card->func->dev);
+ if (ret) {
+ lbs_pr_err("can't load firmware\n");
+ goto out;
+ }
+
+ chunk_buffer = kzalloc(512, GFP_KERNEL);
+ if (!chunk_buffer) {
+ ret = -ENOMEM;
+ goto release_fw;
+ }
+
+ sdio_claim_host(card->func);
+
+ ret = sdio_set_block_size(card->func, 32);
+ if (ret)
+ goto release;
+
+ firmware = fw->data;
+ size = fw->size;
+
+ while (size) {
+ timeout = jiffies + HZ;
+ while (1) {
+ status = sdio_readb(card->func, IF_SDIO_STATUS, &ret);
+ if (ret)
+ goto release;
+ if ((status & IF_SDIO_IO_RDY) &&
+ (status & IF_SDIO_DL_RDY))
+ break;
+ if (time_after(jiffies, timeout)) {
+ ret = -ETIMEDOUT;
+ goto release;
+ }
+ mdelay(1);
+ }
+
+ req_size = sdio_readb(card->func, IF_SDIO_RD_BASE, &ret);
+ if (ret)
+ goto release;
+
+ req_size |= sdio_readb(card->func, IF_SDIO_RD_BASE + 1, &ret) << 8;
+ if (ret)
+ goto release;
+/*
+ lbs_deb_sdio("firmware wants %d bytes\n", (int)req_size);
+*/
+ if (req_size == 0) {
+ lbs_deb_sdio("firmware helper gave up early\n");
+ ret = -EIO;
+ goto release;
+ }
+
+ if (req_size & 0x01) {
+ lbs_deb_sdio("firmware helper signalled error\n");
+ ret = -EIO;
+ goto release;
+ }
+
+ if (req_size > size)
+ req_size = size;
+
+ while (req_size) {
+ chunk_size = min(req_size, (size_t)512);
+
+ memcpy(chunk_buffer, firmware, chunk_size);
+/*
+ lbs_deb_sdio("sending %d bytes (%d bytes) chunk\n",
+ chunk_size, (chunk_size + 31) / 32 * 32);
+*/
+ ret = sdio_writesb(card->func, card->ioport,
+ chunk_buffer, (chunk_size + 31) / 32 * 32);
+ if (ret)
+ goto release;
+
+ firmware += chunk_size;
+ size -= chunk_size;
+ req_size -= chunk_size;
+ }
+ }
+
+ ret = 0;
+
+ lbs_deb_sdio("waiting for firmware to boot...\n");
+
+ /* wait for the firmware to boot */
+ timeout = jiffies + HZ;
+ while (1) {
+ u16 scratch;
+
+ scratch = if_sdio_read_scratch(card, &ret);
+ if (ret)
+ goto release;
+
+ if (scratch == IF_SDIO_FIRMWARE_OK)
+ break;
+
+ if (time_after(jiffies, timeout)) {
+ ret = -ETIMEDOUT;
+ goto release;
+ }
+
+ msleep(10);
+ }
+
+ ret = 0;
+
+release:
+ sdio_set_block_size(card->func, 0);
+ sdio_release_host(card->func);
+ kfree(chunk_buffer);
+release_fw:
+ release_firmware(fw);
+
+out:
+ if (ret)
+ lbs_pr_err("failed to load firmware\n");
+
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+}
+
+static int if_sdio_prog_firmware(struct if_sdio_card *card)
+{
+ int ret;
+ u16 scratch;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ sdio_claim_host(card->func);
+ scratch = if_sdio_read_scratch(card, &ret);
+ sdio_release_host(card->func);
+
+ if (ret)
+ goto out;
+
+ if (scratch == IF_SDIO_FIRMWARE_OK) {
+ lbs_deb_sdio("firmware already loaded\n");
+ goto success;
+ }
+
+ ret = if_sdio_prog_helper(card);
+ if (ret)
+ goto out;
+
+ ret = if_sdio_prog_real(card);
+ if (ret)
+ goto out;
+
+success:
+ ret = 0;
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+}
+
+/*******************************************************************/
+/* Libertas callbacks */
+/*******************************************************************/
+
+static int if_sdio_host_to_card(wlan_private *priv, u8 type, u8 *buf, u16 nb)
+{
+ int ret;
+ struct if_sdio_card *card;
+ struct if_sdio_packet *packet, *cur;
+ u16 size;
+ unsigned long flags;
+
+ lbs_deb_enter_args(LBS_DEB_SDIO, "type %d, bytes %d", type, nb);
+
+ card = priv->card;
+
+ if (nb > (65536 - sizeof(struct if_sdio_packet) - 4)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ /*
+ * The transfer must be in one transaction or the firmware
+ * goes suicidal.
+ */
+ size = nb + 4;
+ if ((size > card->func->cur_blksize) || (size > 512)) {
+ size = (size + card->func->cur_blksize - 1) /
+ card->func->cur_blksize * card->func->cur_blksize;
+ }
+
+ packet = kzalloc(sizeof(struct if_sdio_packet) + size,
+ GFP_ATOMIC);
+ if (!packet) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ packet->next = NULL;
+ packet->nb = size;
+
+ /*
+ * SDIO specific header.
+ */
+ packet->buffer[0] = (nb + 4) & 0xff;
+ packet->buffer[1] = ((nb + 4) >> 8) & 0xff;
+ packet->buffer[2] = type;
+ packet->buffer[3] = 0;
+
+ memcpy(packet->buffer + 4, buf, nb);
+
+ spin_lock_irqsave(&card->lock, flags);
+
+ if (!card->packets)
+ card->packets = packet;
+ else {
+ cur = card->packets;
+ while (cur->next)
+ cur = cur->next;
+ cur->next = packet;
+ }
+
+ switch (type) {
+ case MVMS_CMD:
+ priv->dnld_sent = DNLD_CMD_SENT;
+ break;
+ case MVMS_DAT:
+ priv->dnld_sent = DNLD_DATA_SENT;
+ break;
+ default:
+ lbs_deb_sdio("unknown packet type %d\n", (int)type);
+ }
+
+ spin_unlock_irqrestore(&card->lock, flags);
+
+ schedule_work(&card->packet_worker);
+
+ ret = 0;
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+}
+
+static int if_sdio_get_int_status(wlan_private *priv, u8 *ireg)
+{
+ struct if_sdio_card *card;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ card = priv->card;
+
+ *ireg = card->int_cause;
+ card->int_cause = 0;
+
+ lbs_deb_leave(LBS_DEB_SDIO);
+
+ return 0;
+}
+
+static int if_sdio_read_event_cause(wlan_private *priv)
+{
+ struct if_sdio_card *card;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ card = priv->card;
+
+ priv->adapter->eventcause = card->event;
+
+ lbs_deb_leave(LBS_DEB_SDIO);
+
+ return 0;
+}
+
+/*******************************************************************/
+/* SDIO callbacks */
+/*******************************************************************/
+
+static void if_sdio_interrupt(struct sdio_func *func)
+{
+ int ret;
+ struct if_sdio_card *card;
+ u8 cause;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ card = sdio_get_drvdata(func);
+
+ cause = sdio_readb(card->func, IF_SDIO_H_INT_STATUS, &ret);
+ if (ret)
+ goto out;
+
+ lbs_deb_sdio("interrupt: 0x%X\n", (unsigned)cause);
+
+ sdio_writeb(card->func, ~cause, IF_SDIO_H_INT_STATUS, &ret);
+ if (ret)
+ goto out;
+
+ /*
+ * Ignore the define name, this really means the card has
+ * successfully received the command.
+ */
+ if (cause & IF_SDIO_H_INT_DNLD) {
+ if ((card->priv->dnld_sent == DNLD_DATA_SENT) &&
+ (card->priv->adapter->connect_status == LIBERTAS_CONNECTED))
+ netif_wake_queue(card->priv->dev);
+ card->priv->dnld_sent = DNLD_RES_RECEIVED;
+ }
+
+ if (cause & IF_SDIO_H_INT_UPLD) {
+ ret = if_sdio_card_to_host(card);
+ if (ret)
+ goto out;
+ }
+
+ ret = 0;
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+}
+
+static int if_sdio_probe(struct sdio_func *func,
+ const struct sdio_device_id *id)
+{
+ struct if_sdio_card *card;
+ wlan_private *priv;
+ int ret, i;
+ unsigned int model;
+ struct if_sdio_packet *packet;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ for (i = 0;i < func->card->num_info;i++) {
+ if (sscanf(func->card->info[i],
+ "802.11 SDIO ID: %x", &model) == 1)
+ break;
+ if (sscanf(func->card->info[i],
+ "ID: %x", &model) == 1)
+ break;
+ }
+
+ if (i == func->card->num_info) {
+ lbs_pr_err("unable to identify card model\n");
+ return -ENODEV;
+ }
+
+ card = kzalloc(sizeof(struct if_sdio_card), GFP_KERNEL);
+ if (!card)
+ return -ENOMEM;
+
+ card->func = func;
+ card->model = model;
+ spin_lock_init(&card->lock);
+ INIT_WORK(&card->packet_worker, if_sdio_host_to_card_worker);
+
+ for (i = 0;i < ARRAY_SIZE(if_sdio_models);i++) {
+ if (card->model == if_sdio_models[i].model)
+ break;
+ }
+
+ if (i == ARRAY_SIZE(if_sdio_models)) {
+ lbs_pr_err("unkown card model 0x%x\n", card->model);
+ ret = -ENODEV;
+ goto free;
+ }
+
+ card->helper = if_sdio_models[i].helper;
+ card->firmware = if_sdio_models[i].firmware;
+
+ if (libertas_helper_name) {
+ lbs_deb_sdio("overriding helper firmware: %s\n",
+ libertas_helper_name);
+ card->helper = libertas_helper_name;
+ }
+
+ if (libertas_fw_name) {
+ lbs_deb_sdio("overriding firmware: %s\n", libertas_fw_name);
+ card->firmware = libertas_fw_name;
+ }
+
+ sdio_claim_host(func);
+
+ ret = sdio_enable_func(func);
+ if (ret)
+ goto release;
+
+ ret = sdio_claim_irq(func, if_sdio_interrupt);
+ if (ret)
+ goto disable;
+
+ card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
+ if (ret)
+ goto release_int;
+
+ card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 1, &ret) << 8;
+ if (ret)
+ goto release_int;
+
+ card->ioport |= sdio_readb(func, IF_SDIO_IOPORT + 2, &ret) << 16;
+ if (ret)
+ goto release_int;
+
+ sdio_release_host(func);
+
+ sdio_set_drvdata(func, card);
+
+ lbs_deb_sdio("class = 0x%X, vendor = 0x%X, "
+ "device = 0x%X, model = 0x%X, ioport = 0x%X\n",
+ func->class, func->vendor, func->device,
+ model, (unsigned)card->ioport);
+
+ ret = if_sdio_prog_firmware(card);
+ if (ret)
+ goto reclaim;
+
+ priv = libertas_add_card(card, &func->dev);
+ if (!priv) {
+ ret = -ENOMEM;
+ goto reclaim;
+ }
+
+ card->priv = priv;
+
+ priv->card = card;
+ priv->hw_host_to_card = if_sdio_host_to_card;
+ priv->hw_get_int_status = if_sdio_get_int_status;
+ priv->hw_read_event_cause = if_sdio_read_event_cause;
+
+ priv->adapter->fw_ready = 1;
+
+ /*
+ * Enable interrupts now that everything is set up
+ */
+ sdio_claim_host(func);
+ sdio_writeb(func, 0x0f, IF_SDIO_H_INT_MASK, &ret);
+ sdio_release_host(func);
+ if (ret)
+ goto reclaim;
+
+ ret = libertas_start_card(priv);
+ if (ret)
+ goto err_activate_card;
+
+out:
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+
+err_activate_card:
+ flush_scheduled_work();
+ free_netdev(priv->dev);
+ kfree(priv->adapter);
+reclaim:
+ sdio_claim_host(func);
+release_int:
+ sdio_release_irq(func);
+disable:
+ sdio_disable_func(func);
+release:
+ sdio_release_host(func);
+free:
+ while (card->packets) {
+ packet = card->packets;
+ card->packets = card->packets->next;
+ kfree(packet);
+ }
+
+ kfree(card);
+
+ goto out;
+}
+
+static void if_sdio_remove(struct sdio_func *func)
+{
+ struct if_sdio_card *card;
+ struct if_sdio_packet *packet;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ card = sdio_get_drvdata(func);
+
+ card->priv->adapter->surpriseremoved = 1;
+
+ lbs_deb_sdio("call remove card\n");
+ libertas_stop_card(card->priv);
+ libertas_remove_card(card->priv);
+
+ flush_scheduled_work();
+
+ sdio_claim_host(func);
+ sdio_release_irq(func);
+ sdio_disable_func(func);
+ sdio_release_host(func);
+
+ while (card->packets) {
+ packet = card->packets;
+ card->packets = card->packets->next;
+ kfree(packet);
+ }
+
+ kfree(card);
+
+ lbs_deb_leave(LBS_DEB_SDIO);
+}
+
+static struct sdio_driver if_sdio_driver = {
+ .name = "libertas_sdio",
+ .id_table = if_sdio_ids,
+ .probe = if_sdio_probe,
+ .remove = if_sdio_remove,
+};
+
+/*******************************************************************/
+/* Module functions */
+/*******************************************************************/
+
+static int if_sdio_init_module(void)
+{
+ int ret = 0;
+
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ printk(KERN_INFO "libertas_sdio: Libertas SDIO driver\n");
+ printk(KERN_INFO "libertas_sdio: Copyright Pierre Ossman\n");
+
+ ret = sdio_register_driver(&if_sdio_driver);
+
+ lbs_deb_leave_args(LBS_DEB_SDIO, "ret %d", ret);
+
+ return ret;
+}
+
+static void if_sdio_exit_module(void)
+{
+ lbs_deb_enter(LBS_DEB_SDIO);
+
+ sdio_unregister_driver(&if_sdio_driver);
+
+ lbs_deb_leave(LBS_DEB_SDIO);
+}
+
+module_init(if_sdio_init_module);
+module_exit(if_sdio_exit_module);
+
+MODULE_DESCRIPTION("Libertas SDIO WLAN Driver");
+MODULE_AUTHOR("Pierre Ossman");
+MODULE_LICENSE("GPL");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff