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path: root/drivers/net/wireless/iwmc3200wifi/sdio.c
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Diffstat (limited to 'drivers/net/wireless/iwmc3200wifi/sdio.c')
-rw-r--r--drivers/net/wireless/iwmc3200wifi/sdio.c516
1 files changed, 516 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwmc3200wifi/sdio.c b/drivers/net/wireless/iwmc3200wifi/sdio.c
new file mode 100644
index 000000000000..b54da677b371
--- /dev/null
+++ b/drivers/net/wireless/iwmc3200wifi/sdio.c
@@ -0,0 +1,516 @@
+/*
+ * Intel Wireless Multicomm 3200 WiFi driver
+ *
+ * Copyright (C) 2009 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <ilw@linux.intel.com>
+ * Samuel Ortiz <samuel.ortiz@intel.com>
+ * Zhu Yi <yi.zhu@intel.com>
+ *
+ */
+
+/*
+ * This is the SDIO bus specific hooks for iwm.
+ * It also is the module's entry point.
+ *
+ * Interesting code paths:
+ * iwm_sdio_probe() (Called by an SDIO bus scan)
+ * -> iwm_if_alloc() (netdev.c)
+ * -> iwm_wdev_alloc() (cfg80211.c, allocates and register our wiphy)
+ * -> wiphy_new()
+ * -> wiphy_register()
+ * -> alloc_netdev_mq()
+ * -> register_netdev()
+ *
+ * iwm_sdio_remove()
+ * -> iwm_if_free() (netdev.c)
+ * -> unregister_netdev()
+ * -> iwm_wdev_free() (cfg80211.c)
+ * -> wiphy_unregister()
+ * -> wiphy_free()
+ *
+ * iwm_sdio_isr() (called in process context from the SDIO core code)
+ * -> queue_work(.., isr_worker)
+ * -- [async] --> iwm_sdio_isr_worker()
+ * -> iwm_rx_handle()
+ */
+
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/debugfs.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
+
+#include "iwm.h"
+#include "debug.h"
+#include "bus.h"
+#include "sdio.h"
+
+static void iwm_sdio_isr_worker(struct work_struct *work)
+{
+ struct iwm_sdio_priv *hw;
+ struct iwm_priv *iwm;
+ struct iwm_rx_info *rx_info;
+ struct sk_buff *skb;
+ u8 *rx_buf;
+ unsigned long rx_size;
+
+ hw = container_of(work, struct iwm_sdio_priv, isr_worker);
+ iwm = hw_to_iwm(hw);
+
+ while (!skb_queue_empty(&iwm->rx_list)) {
+ skb = skb_dequeue(&iwm->rx_list);
+ rx_info = skb_to_rx_info(skb);
+ rx_size = rx_info->rx_size;
+ rx_buf = skb->data;
+
+ IWM_HEXDUMP(iwm, DBG, SDIO, "RX: ", rx_buf, rx_size);
+ if (iwm_rx_handle(iwm, rx_buf, rx_size) < 0)
+ IWM_WARN(iwm, "RX error\n");
+
+ kfree_skb(skb);
+ }
+}
+
+static void iwm_sdio_isr(struct sdio_func *func)
+{
+ struct iwm_priv *iwm;
+ struct iwm_sdio_priv *hw;
+ struct iwm_rx_info *rx_info;
+ struct sk_buff *skb;
+ unsigned long buf_size, read_size;
+ int ret;
+ u8 val;
+
+ hw = sdio_get_drvdata(func);
+ iwm = hw_to_iwm(hw);
+
+ buf_size = hw->blk_size;
+
+ /* We're checking the status */
+ val = sdio_readb(func, IWM_SDIO_INTR_STATUS_ADDR, &ret);
+ if (val == 0 || ret < 0) {
+ IWM_ERR(iwm, "Wrong INTR_STATUS\n");
+ return;
+ }
+
+ /* See if we have free buffers */
+ if (skb_queue_len(&iwm->rx_list) > IWM_RX_LIST_SIZE) {
+ IWM_ERR(iwm, "No buffer for more Rx frames\n");
+ return;
+ }
+
+ /* We first read the transaction size */
+ read_size = sdio_readb(func, IWM_SDIO_INTR_GET_SIZE_ADDR + 1, &ret);
+ read_size = read_size << 8;
+
+ if (ret < 0) {
+ IWM_ERR(iwm, "Couldn't read the xfer size\n");
+ return;
+ }
+
+ /* We need to clear the INT register */
+ sdio_writeb(func, 1, IWM_SDIO_INTR_CLEAR_ADDR, &ret);
+ if (ret < 0) {
+ IWM_ERR(iwm, "Couldn't clear the INT register\n");
+ return;
+ }
+
+ while (buf_size < read_size)
+ buf_size <<= 1;
+
+ skb = dev_alloc_skb(buf_size);
+ if (!skb) {
+ IWM_ERR(iwm, "Couldn't alloc RX skb\n");
+ return;
+ }
+ rx_info = skb_to_rx_info(skb);
+ rx_info->rx_size = read_size;
+ rx_info->rx_buf_size = buf_size;
+
+ /* Now we can read the actual buffer */
+ ret = sdio_memcpy_fromio(func, skb_put(skb, read_size),
+ IWM_SDIO_DATA_ADDR, read_size);
+
+ /* The skb is put on a driver's specific Rx SKB list */
+ skb_queue_tail(&iwm->rx_list, skb);
+
+ /* We can now schedule the actual worker */
+ queue_work(hw->isr_wq, &hw->isr_worker);
+}
+
+static void iwm_sdio_rx_free(struct iwm_sdio_priv *hw)
+{
+ struct iwm_priv *iwm = hw_to_iwm(hw);
+
+ flush_workqueue(hw->isr_wq);
+
+ skb_queue_purge(&iwm->rx_list);
+}
+
+/* Bus ops */
+static int if_sdio_enable(struct iwm_priv *iwm)
+{
+ struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm);
+ int ret;
+
+ sdio_claim_host(hw->func);
+
+ ret = sdio_enable_func(hw->func);
+ if (ret) {
+ IWM_ERR(iwm, "Couldn't enable the device: is TOP driver "
+ "loaded and functional?\n");
+ goto release_host;
+ }
+
+ iwm_reset(iwm);
+
+ ret = sdio_claim_irq(hw->func, iwm_sdio_isr);
+ if (ret) {
+ IWM_ERR(iwm, "Failed to claim irq: %d\n", ret);
+ goto release_host;
+ }
+
+ sdio_writeb(hw->func, 1, IWM_SDIO_INTR_ENABLE_ADDR, &ret);
+ if (ret < 0) {
+ IWM_ERR(iwm, "Couldn't enable INTR: %d\n", ret);
+ goto release_irq;
+ }
+
+ sdio_release_host(hw->func);
+
+ IWM_DBG_SDIO(iwm, INFO, "IWM SDIO enable\n");
+
+ return 0;
+
+ release_irq:
+ sdio_release_irq(hw->func);
+ release_host:
+ sdio_release_host(hw->func);
+
+ return ret;
+}
+
+static int if_sdio_disable(struct iwm_priv *iwm)
+{
+ struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm);
+ int ret;
+
+ iwm_reset(iwm);
+
+ sdio_claim_host(hw->func);
+ sdio_writeb(hw->func, 0, IWM_SDIO_INTR_ENABLE_ADDR, &ret);
+ if (ret < 0)
+ IWM_WARN(iwm, "Couldn't disable INTR: %d\n", ret);
+
+ sdio_release_irq(hw->func);
+ sdio_disable_func(hw->func);
+ sdio_release_host(hw->func);
+
+ iwm_sdio_rx_free(hw);
+
+ IWM_DBG_SDIO(iwm, INFO, "IWM SDIO disable\n");
+
+ return 0;
+}
+
+static int if_sdio_send_chunk(struct iwm_priv *iwm, u8 *buf, int count)
+{
+ struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm);
+ int aligned_count = ALIGN(count, hw->blk_size);
+ int ret;
+
+ if ((unsigned long)buf & 0x3) {
+ IWM_ERR(iwm, "buf <%p> is not dword aligned\n", buf);
+ /* TODO: Is this a hardware limitation? use get_unligned */
+ return -EINVAL;
+ }
+
+ sdio_claim_host(hw->func);
+ ret = sdio_memcpy_toio(hw->func, IWM_SDIO_DATA_ADDR, buf,
+ aligned_count);
+ sdio_release_host(hw->func);
+
+ return ret;
+}
+
+/* debugfs hooks */
+static int iwm_debugfs_sdio_open(struct inode *inode, struct file *filp)
+{
+ filp->private_data = inode->i_private;
+ return 0;
+}
+
+static ssize_t iwm_debugfs_sdio_read(struct file *filp, char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct iwm_priv *iwm = filp->private_data;
+ struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm);
+ char *buf;
+ u8 cccr;
+ int buf_len = 4096, ret;
+ size_t len = 0;
+
+ if (*ppos != 0)
+ return 0;
+ if (count < sizeof(buf))
+ return -ENOSPC;
+
+ buf = kzalloc(buf_len, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ sdio_claim_host(hw->func);
+
+ cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IOEx, &ret);
+ if (ret) {
+ IWM_ERR(iwm, "Could not read SDIO_CCCR_IOEx\n");
+ goto err;
+ }
+ len += snprintf(buf + len, buf_len - len, "CCCR_IOEx: 0x%x\n", cccr);
+
+ cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IORx, &ret);
+ if (ret) {
+ IWM_ERR(iwm, "Could not read SDIO_CCCR_IORx\n");
+ goto err;
+ }
+ len += snprintf(buf + len, buf_len - len, "CCCR_IORx: 0x%x\n", cccr);
+
+
+ cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IENx, &ret);
+ if (ret) {
+ IWM_ERR(iwm, "Could not read SDIO_CCCR_IENx\n");
+ goto err;
+ }
+ len += snprintf(buf + len, buf_len - len, "CCCR_IENx: 0x%x\n", cccr);
+
+
+ cccr = sdio_f0_readb(hw->func, SDIO_CCCR_INTx, &ret);
+ if (ret) {
+ IWM_ERR(iwm, "Could not read SDIO_CCCR_INTx\n");
+ goto err;
+ }
+ len += snprintf(buf + len, buf_len - len, "CCCR_INTx: 0x%x\n", cccr);
+
+
+ cccr = sdio_f0_readb(hw->func, SDIO_CCCR_ABORT, &ret);
+ if (ret) {
+ IWM_ERR(iwm, "Could not read SDIO_CCCR_ABORTx\n");
+ goto err;
+ }
+ len += snprintf(buf + len, buf_len - len, "CCCR_ABORT: 0x%x\n", cccr);
+
+ cccr = sdio_f0_readb(hw->func, SDIO_CCCR_IF, &ret);
+ if (ret) {
+ IWM_ERR(iwm, "Could not read SDIO_CCCR_IF\n");
+ goto err;
+ }
+ len += snprintf(buf + len, buf_len - len, "CCCR_IF: 0x%x\n", cccr);
+
+
+ cccr = sdio_f0_readb(hw->func, SDIO_CCCR_CAPS, &ret);
+ if (ret) {
+ IWM_ERR(iwm, "Could not read SDIO_CCCR_CAPS\n");
+ goto err;
+ }
+ len += snprintf(buf + len, buf_len - len, "CCCR_CAPS: 0x%x\n", cccr);
+
+ cccr = sdio_f0_readb(hw->func, SDIO_CCCR_CIS, &ret);
+ if (ret) {
+ IWM_ERR(iwm, "Could not read SDIO_CCCR_CIS\n");
+ goto err;
+ }
+ len += snprintf(buf + len, buf_len - len, "CCCR_CIS: 0x%x\n", cccr);
+
+ ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
+err:
+ sdio_release_host(hw->func);
+
+ kfree(buf);
+
+ return ret;
+}
+
+static const struct file_operations iwm_debugfs_sdio_fops = {
+ .owner = THIS_MODULE,
+ .open = iwm_debugfs_sdio_open,
+ .read = iwm_debugfs_sdio_read,
+};
+
+static int if_sdio_debugfs_init(struct iwm_priv *iwm, struct dentry *parent_dir)
+{
+ int result;
+ struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm);
+
+ hw->cccr_dentry = debugfs_create_file("cccr", 0200,
+ parent_dir, iwm,
+ &iwm_debugfs_sdio_fops);
+ result = PTR_ERR(hw->cccr_dentry);
+ if (IS_ERR(hw->cccr_dentry) && (result != -ENODEV)) {
+ IWM_ERR(iwm, "Couldn't create CCCR entry: %d\n", result);
+ return result;
+ }
+
+ return 0;
+}
+
+static void if_sdio_debugfs_exit(struct iwm_priv *iwm)
+{
+ struct iwm_sdio_priv *hw = iwm_to_if_sdio(iwm);
+
+ debugfs_remove(hw->cccr_dentry);
+}
+
+static struct iwm_if_ops if_sdio_ops = {
+ .enable = if_sdio_enable,
+ .disable = if_sdio_disable,
+ .send_chunk = if_sdio_send_chunk,
+ .debugfs_init = if_sdio_debugfs_init,
+ .debugfs_exit = if_sdio_debugfs_exit,
+ .umac_name = "iwmc3200wifi-umac-sdio.bin",
+ .calib_lmac_name = "iwmc3200wifi-calib-sdio.bin",
+ .lmac_name = "iwmc3200wifi-lmac-sdio.bin",
+};
+
+static int iwm_sdio_probe(struct sdio_func *func,
+ const struct sdio_device_id *id)
+{
+ struct iwm_priv *iwm;
+ struct iwm_sdio_priv *hw;
+ struct device *dev = &func->dev;
+ int ret;
+
+ /* check if TOP has already initialized the card */
+ sdio_claim_host(func);
+ ret = sdio_enable_func(func);
+ if (ret) {
+ dev_err(dev, "wait for TOP to enable the device\n");
+ sdio_release_host(func);
+ return ret;
+ }
+
+ ret = sdio_set_block_size(func, IWM_SDIO_BLK_SIZE);
+
+ sdio_disable_func(func);
+ sdio_release_host(func);
+
+ if (ret < 0) {
+ dev_err(dev, "Failed to set block size: %d\n", ret);
+ return ret;
+ }
+
+ iwm = iwm_if_alloc(sizeof(struct iwm_sdio_priv), dev, &if_sdio_ops);
+ if (IS_ERR(iwm)) {
+ dev_err(dev, "allocate SDIO interface failed\n");
+ return PTR_ERR(iwm);
+ }
+
+ hw = iwm_private(iwm);
+ hw->iwm = iwm;
+
+ ret = iwm_debugfs_init(iwm);
+ if (ret < 0) {
+ IWM_ERR(iwm, "Debugfs registration failed\n");
+ goto if_free;
+ }
+
+ sdio_set_drvdata(func, hw);
+
+ hw->func = func;
+ hw->blk_size = IWM_SDIO_BLK_SIZE;
+
+ hw->isr_wq = create_singlethread_workqueue(KBUILD_MODNAME "_sdio");
+ if (!hw->isr_wq) {
+ ret = -ENOMEM;
+ goto debugfs_exit;
+ }
+
+ INIT_WORK(&hw->isr_worker, iwm_sdio_isr_worker);
+
+ dev_info(dev, "IWM SDIO probe\n");
+
+ return 0;
+
+ debugfs_exit:
+ iwm_debugfs_exit(iwm);
+ if_free:
+ iwm_if_free(iwm);
+ return ret;
+}
+
+static void iwm_sdio_remove(struct sdio_func *func)
+{
+ struct iwm_sdio_priv *hw = sdio_get_drvdata(func);
+ struct iwm_priv *iwm = hw_to_iwm(hw);
+ struct device *dev = &func->dev;
+
+ iwm_debugfs_exit(iwm);
+ iwm_if_free(iwm);
+ destroy_workqueue(hw->isr_wq);
+
+ sdio_set_drvdata(func, NULL);
+
+ dev_info(dev, "IWM SDIO remove\n");
+
+ return;
+}
+
+static const struct sdio_device_id iwm_sdio_ids[] = {
+ { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, SDIO_DEVICE_ID_IWM) },
+ { /* end: all zeroes */ },
+};
+MODULE_DEVICE_TABLE(sdio, iwm_sdio_ids);
+
+static struct sdio_driver iwm_sdio_driver = {
+ .name = "iwm_sdio",
+ .id_table = iwm_sdio_ids,
+ .probe = iwm_sdio_probe,
+ .remove = iwm_sdio_remove,
+};
+
+static int __init iwm_sdio_init_module(void)
+{
+ int ret;
+
+ ret = sdio_register_driver(&iwm_sdio_driver);
+
+ return ret;
+}
+
+static void __exit iwm_sdio_exit_module(void)
+{
+ sdio_unregister_driver(&iwm_sdio_driver);
+}
+
+module_init(iwm_sdio_init_module);
+module_exit(iwm_sdio_exit_module);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR(IWM_COPYRIGHT " " IWM_AUTHOR);