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path: root/drivers/net/wimax/i2400m/sdio-rx.c
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Diffstat (limited to 'drivers/net/wimax/i2400m/sdio-rx.c')
-rw-r--r--drivers/net/wimax/i2400m/sdio-rx.c255
1 files changed, 0 insertions, 255 deletions
diff --git a/drivers/net/wimax/i2400m/sdio-rx.c b/drivers/net/wimax/i2400m/sdio-rx.c
deleted file mode 100644
index a3008b904f7..00000000000
--- a/drivers/net/wimax/i2400m/sdio-rx.c
+++ /dev/null
@@ -1,255 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * SDIO RX handling
- *
- *
- * Copyright (C) 2007-2008 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 <linux-wimax@intel.com>
- * Dirk Brandewie <dirk.j.brandewie@intel.com>
- * - Initial implementation
- *
- *
- * This handles the RX path on SDIO.
- *
- * The SDIO bus driver calls the "irq" routine when data is available.
- * This is not a traditional interrupt routine since the SDIO bus
- * driver calls us from its irq thread context. Because of this
- * sleeping in the SDIO RX IRQ routine is okay.
- *
- * From there on, we obtain the size of the data that is available,
- * allocate an skb, copy it and then pass it to the generic driver's
- * RX routine [i2400m_rx()].
- *
- * ROADMAP
- *
- * i2400ms_irq()
- * i2400ms_rx()
- * __i2400ms_rx_get_size()
- * i2400m_rx()
- *
- * i2400ms_rx_setup()
- *
- * i2400ms_rx_release()
- */
-#include <linux/workqueue.h>
-#include <linux/wait.h>
-#include <linux/skbuff.h>
-#include <linux/mmc/sdio.h>
-#include <linux/mmc/sdio_func.h>
-#include "i2400m-sdio.h"
-
-#define D_SUBMODULE rx
-#include "sdio-debug-levels.h"
-
-
-/*
- * Read and return the amount of bytes available for RX
- *
- * The RX size has to be read like this: byte reads of three
- * sequential locations; then glue'em together.
- *
- * sdio_readl() doesn't work.
- */
-ssize_t __i2400ms_rx_get_size(struct i2400ms *i2400ms)
-{
- int ret, cnt, val;
- ssize_t rx_size;
- unsigned xfer_size_addr;
- struct sdio_func *func = i2400ms->func;
- struct device *dev = &i2400ms->func->dev;
-
- d_fnstart(7, dev, "(i2400ms %p)\n", i2400ms);
- xfer_size_addr = I2400MS_INTR_GET_SIZE_ADDR;
- rx_size = 0;
- for (cnt = 0; cnt < 3; cnt++) {
- val = sdio_readb(func, xfer_size_addr + cnt, &ret);
- if (ret < 0) {
- dev_err(dev, "RX: Can't read byte %d of RX size from "
- "0x%08x: %d\n", cnt, xfer_size_addr + cnt, ret);
- rx_size = ret;
- goto error_read;
- }
- rx_size = rx_size << 8 | (val & 0xff);
- }
- d_printf(6, dev, "RX: rx_size is %ld\n", (long) rx_size);
-error_read:
- d_fnend(7, dev, "(i2400ms %p) = %ld\n", i2400ms, (long) rx_size);
- return rx_size;
-}
-
-
-/*
- * Read data from the device (when in normal)
- *
- * Allocate an SKB of the right size, read the data in and then
- * deliver it to the generic layer.
- *
- * We also check for a reboot barker. That means the device died and
- * we have to reboot it.
- */
-static
-void i2400ms_rx(struct i2400ms *i2400ms)
-{
- int ret;
- struct sdio_func *func = i2400ms->func;
- struct device *dev = &func->dev;
- struct i2400m *i2400m = &i2400ms->i2400m;
- struct sk_buff *skb;
- ssize_t rx_size;
-
- d_fnstart(7, dev, "(i2400ms %p)\n", i2400ms);
- rx_size = __i2400ms_rx_get_size(i2400ms);
- if (rx_size < 0) {
- ret = rx_size;
- goto error_get_size;
- }
- ret = -ENOMEM;
- skb = alloc_skb(rx_size, GFP_ATOMIC);
- if (NULL == skb) {
- dev_err(dev, "RX: unable to alloc skb\n");
- goto error_alloc_skb;
- }
-
- ret = sdio_memcpy_fromio(func, skb->data,
- I2400MS_DATA_ADDR, rx_size);
- if (ret < 0) {
- dev_err(dev, "RX: SDIO data read failed: %d\n", ret);
- goto error_memcpy_fromio;
- }
- /* Check if device has reset */
- if (!memcmp(skb->data, i2400m_NBOOT_BARKER,
- sizeof(i2400m_NBOOT_BARKER))
- || !memcmp(skb->data, i2400m_SBOOT_BARKER,
- sizeof(i2400m_SBOOT_BARKER))) {
- ret = i2400m_dev_reset_handle(i2400m);
- kfree_skb(skb);
- } else {
- skb_put(skb, rx_size);
- i2400m_rx(i2400m, skb);
- }
- d_fnend(7, dev, "(i2400ms %p) = void\n", i2400ms);
- return;
-
-error_memcpy_fromio:
- kfree_skb(skb);
-error_alloc_skb:
-error_get_size:
- d_fnend(7, dev, "(i2400ms %p) = %d\n", i2400ms, ret);
- return;
-}
-
-
-/*
- * Process an interrupt from the SDIO card
- *
- * FIXME: need to process other events that are not just ready-to-read
- *
- * Checks there is data ready and then proceeds to read it.
- */
-static
-void i2400ms_irq(struct sdio_func *func)
-{
- int ret;
- struct i2400ms *i2400ms = sdio_get_drvdata(func);
- struct i2400m *i2400m = &i2400ms->i2400m;
- struct device *dev = &func->dev;
- int val;
-
- d_fnstart(6, dev, "(i2400ms %p)\n", i2400ms);
- val = sdio_readb(func, I2400MS_INTR_STATUS_ADDR, &ret);
- if (ret < 0) {
- dev_err(dev, "RX: Can't read interrupt status: %d\n", ret);
- goto error_no_irq;
- }
- if (!val) {
- dev_err(dev, "RX: BUG? got IRQ but no interrupt ready?\n");
- goto error_no_irq;
- }
- sdio_writeb(func, 1, I2400MS_INTR_CLEAR_ADDR, &ret);
- if (WARN_ON(i2400m->boot_mode != 0))
- dev_err(dev, "RX: SW BUG? boot mode and IRQ is up?\n");
- else
- i2400ms_rx(i2400ms);
-error_no_irq:
- d_fnend(6, dev, "(i2400ms %p) = void\n", i2400ms);
- return;
-}
-
-
-/*
- * Setup SDIO RX
- *
- * Hooks up the IRQ handler and then enables IRQs.
- */
-int i2400ms_rx_setup(struct i2400ms *i2400ms)
-{
- int result;
- struct sdio_func *func = i2400ms->func;
- struct device *dev = &func->dev;
-
- d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms);
- sdio_claim_host(func);
- result = sdio_claim_irq(func, i2400ms_irq);
- if (result < 0) {
- dev_err(dev, "Cannot claim IRQ: %d\n", result);
- goto error_irq_claim;
- }
- result = 0;
- sdio_writeb(func, 1, I2400MS_INTR_ENABLE_ADDR, &result);
- if (result < 0) {
- sdio_release_irq(func);
- dev_err(dev, "Failed to enable interrupts %d\n", result);
- }
-error_irq_claim:
- sdio_release_host(func);
- d_fnend(5, dev, "(i2400ms %p) = %d\n", i2400ms, result);
- return result;
-}
-
-
-/*
- * Tear down SDIO RX
- *
- * Disables IRQs in the device and removes the IRQ handler.
- */
-void i2400ms_rx_release(struct i2400ms *i2400ms)
-{
- int result;
- struct sdio_func *func = i2400ms->func;
- struct device *dev = &func->dev;
-
- d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms);
- sdio_claim_host(func);
- sdio_writeb(func, 0, I2400MS_INTR_ENABLE_ADDR, &result);
- sdio_release_irq(func);
- sdio_release_host(func);
- d_fnend(5, dev, "(i2400ms %p) = %d\n", i2400ms, result);
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-11 07:48:29 +0000