i2400m: remove SDIO device support

SDIO support in this driver was intended to support the iwmc3200
device.  This hardware never became available to normal humans.
Leaving this driver imposes unwelcome maintenance costs for no clear
benefit.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Acked-by: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>

1 files changed, 0 insertions, 602 deletions

diff --git a/drivers/net/wimax/i2400m/sdio.c b/drivers/net/wimax/i2400m/sdio.c
deleted file mode 100644
index 21a9edd6e75d..000000000000
--- a/drivers/net/wimax/i2400m/sdio.c
+++ /dev/null
@@ -1,602 +0,0 @@
-/*
- * Intel Wireless WiMAX Connection 2400m
- * Linux driver model glue for the SDIO device, reset & fw upload
- *
- *
- * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
- * Dirk Brandewie <dirk.j.brandewie@intel.com>
- * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
- * Yanir Lubetkin <yanirx.lubetkin@intel.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- *
- * See i2400m-sdio.h for a general description of this driver.
- *
- * This file implements driver model glue, and hook ups for the
- * generic driver to implement the bus-specific functions (device
- * communication setup/tear down, firmware upload and resetting).
- *
- * ROADMAP
- *
- * i2400m_probe()
- *   alloc_netdev()
- *     i2400ms_netdev_setup()
- *       i2400ms_init()
- *       i2400m_netdev_setup()
- *   i2400ms_enable_function()
- *   i2400m_setup()
- *
- * i2400m_remove()
- *     i2400m_release()
- *     free_netdev(net_dev)
- *
- * i2400ms_bus_reset()            Called by i2400m_reset
- *   __i2400ms_reset()
- *     __i2400ms_send_barker()
- */
-
-#include <linux/slab.h>
-#include <linux/debugfs.h>
-#include <linux/mmc/sdio_ids.h>
-#include <linux/mmc/sdio.h>
-#include <linux/mmc/sdio_func.h>
-#include "i2400m-sdio.h"
-#include <linux/wimax/i2400m.h>
-#include <linux/module.h>
-
-#define D_SUBMODULE main
-#include "sdio-debug-levels.h"
-
-/* IOE WiMAX function timeout in seconds */
-static int ioe_timeout = 2;
-module_param(ioe_timeout, int, 0);
-
-static char i2400ms_debug_params[128];
-module_param_string(debug, i2400ms_debug_params, sizeof(i2400ms_debug_params),
-		    0644);
-MODULE_PARM_DESC(debug,
-		 "String of space-separated NAME:VALUE pairs, where NAMEs "
-		 "are the different debug submodules and VALUE are the "
-		 "initial debug value to set.");
-
-/* Our firmware file name list */
-static const char *i2400ms_bus_fw_names[] = {
-#define I2400MS_FW_FILE_NAME "i2400m-fw-sdio-1.3.sbcf"
-	I2400MS_FW_FILE_NAME,
-	NULL
-};
-
-
-static const struct i2400m_poke_table i2400ms_pokes[] = {
-	I2400M_FW_POKE(0x6BE260, 0x00000088),
-	I2400M_FW_POKE(0x080550, 0x00000005),
-	I2400M_FW_POKE(0xAE0000, 0x00000000),
-	I2400M_FW_POKE(0x000000, 0x00000000), /* MUST be 0 terminated or bad
-					       * things will happen */
-};
-
-/*
- * Enable the SDIO function
- *
- * Tries to enable the SDIO function; might fail if it is still not
- * ready (in some hardware, the SDIO WiMAX function is only enabled
- * when we ask it to explicitly doing). Tries until a timeout is
- * reached.
- *
- * The @maxtries argument indicates how many times (at most) it should
- * be tried to enable the function. 0 means forever. This acts along
- * with the timeout (ie: it'll stop trying as soon as the maximum
- * number of tries is reached _or_ as soon as the timeout is reached).
- *
- * The reverse of this is...sdio_disable_function()
- *
- * Returns: 0 if the SDIO function was enabled, < 0 errno code on
- *     error (-ENODEV when it was unable to enable the function).
- */
-static
-int i2400ms_enable_function(struct i2400ms *i2400ms, unsigned maxtries)
-{
-	struct sdio_func *func = i2400ms->func;
-	u64 timeout;
-	int err;
-	struct device *dev = &func->dev;
-	unsigned tries = 0;
-
-	d_fnstart(3, dev, "(func %p)\n", func);
-	/* Setup timeout (FIXME: This needs to read the CIS table to
-	 * get a real timeout) and then wait for the device to signal
-	 * it is ready */
-	timeout = get_jiffies_64() + ioe_timeout * HZ;
-	err = -ENODEV;
-	while (err != 0 && time_before64(get_jiffies_64(), timeout)) {
-		sdio_claim_host(func);
-		/*
-		 * There is a sillicon bug on the IWMC3200, where the
-		 * IOE timeout will cause problems on Moorestown
-		 * platforms (system hang). We explicitly overwrite
-		 * func->enable_timeout here to work around the issue.
-		 */
-		if (i2400ms->iwmc3200)
-			func->enable_timeout = IWMC3200_IOR_TIMEOUT;
-		err = sdio_enable_func(func);
-		if (0 == err) {
-			sdio_release_host(func);
-			d_printf(2, dev, "SDIO function enabled\n");
-			goto function_enabled;
-		}
-		d_printf(2, dev, "SDIO function failed to enable: %d\n", err);
-		sdio_release_host(func);
-		if (maxtries > 0 && ++tries >= maxtries) {
-			err = -ETIME;
-			break;
-		}
-		msleep(I2400MS_INIT_SLEEP_INTERVAL);
-	}
-	/* If timed out, device is not there yet -- get -ENODEV so
-	 * the device driver core will retry later on. */
-	if (err == -ETIME) {
-		dev_err(dev, "Can't enable WiMAX function; "
-			" has the function been enabled?\n");
-		err = -ENODEV;
-	}
-function_enabled:
-	d_fnend(3, dev, "(func %p) = %d\n", func, err);
-	return err;
-}
-
-
-/*
- * Setup minimal device communication infrastructure needed to at
- * least be able to update the firmware.
- *
- * Note the ugly trick: if we are in the probe path
- * (i2400ms->debugfs_dentry == NULL), we only retry function
- * enablement one, to avoid racing with the iwmc3200 top controller.
- */
-static
-int i2400ms_bus_setup(struct i2400m *i2400m)
-{
-	int result;
-	struct i2400ms *i2400ms =
-		container_of(i2400m, struct i2400ms, i2400m);
-	struct device *dev = i2400m_dev(i2400m);
-	struct sdio_func *func = i2400ms->func;
-	int retries;
-
-	sdio_claim_host(func);
-	result = sdio_set_block_size(func, I2400MS_BLK_SIZE);
-	sdio_release_host(func);
-	if (result < 0) {
-		dev_err(dev, "Failed to set block size: %d\n", result);
-		goto error_set_blk_size;
-	}
-
-	if (i2400ms->iwmc3200 && i2400ms->debugfs_dentry == NULL)
-		retries = 1;
-	else
-		retries = 0;
-	result = i2400ms_enable_function(i2400ms, retries);
-	if (result < 0) {
-		dev_err(dev, "Cannot enable SDIO function: %d\n", result);
-		goto error_func_enable;
-	}
-
-	result = i2400ms_tx_setup(i2400ms);
-	if (result < 0)
-		goto error_tx_setup;
-	result = i2400ms_rx_setup(i2400ms);
-	if (result < 0)
-		goto error_rx_setup;
-	return 0;
-
-error_rx_setup:
-	i2400ms_tx_release(i2400ms);
-error_tx_setup:
-	sdio_claim_host(func);
-	sdio_disable_func(func);
-	sdio_release_host(func);
-error_func_enable:
-error_set_blk_size:
-	return result;
-}
-
-
-/*
- * Tear down minimal device communication infrastructure needed to at
- * least be able to update the firmware.
- */
-static
-void i2400ms_bus_release(struct i2400m *i2400m)
-{
-	struct i2400ms *i2400ms =
-		container_of(i2400m, struct i2400ms, i2400m);
-	struct sdio_func *func = i2400ms->func;
-
-	i2400ms_rx_release(i2400ms);
-	i2400ms_tx_release(i2400ms);
-	sdio_claim_host(func);
-	sdio_disable_func(func);
-	sdio_release_host(func);
-}
-
-
-/*
- * Setup driver resources needed to communicate with the device
- *
- * The fw needs some time to settle, and it was just uploaded,
- * so give it a break first. I'd prefer to just wait for the device to
- * send something, but seems the poking we do to enable SDIO stuff
- * interferes with it, so just give it a break before starting...
- */
-static
-int i2400ms_bus_dev_start(struct i2400m *i2400m)
-{
-	struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
-	struct sdio_func *func = i2400ms->func;
-	struct device *dev = &func->dev;
-
-	d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
-	msleep(200);
-	d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, 0);
-	return 0;
-}
-
-
-/*
- * Sends a barker buffer to the device
- *
- * This helper will allocate a kmalloced buffer and use it to transmit
- * (then free it). Reason for this is that the SDIO host controller
- * expects alignment (unknown exactly which) which the stack won't
- * really provide and certain arches/host-controller combinations
- * cannot use stack/vmalloc/text areas for DMA transfers.
- */
-static
-int __i2400ms_send_barker(struct i2400ms *i2400ms,
-			  const __le32 *barker, size_t barker_size)
-{
-	int  ret;
-	struct sdio_func *func = i2400ms->func;
-	struct device *dev = &func->dev;
-	void *buffer;
-
-	ret = -ENOMEM;
-	buffer = kmalloc(I2400MS_BLK_SIZE, GFP_KERNEL);
-	if (buffer == NULL)
-		goto error_kzalloc;
-
-	memcpy(buffer, barker, barker_size);
-	sdio_claim_host(func);
-	ret = sdio_memcpy_toio(func, 0, buffer, I2400MS_BLK_SIZE);
-	sdio_release_host(func);
-
-	if (ret < 0)
-		d_printf(0, dev, "E: barker error: %d\n", ret);
-
-	kfree(buffer);
-error_kzalloc:
-	return ret;
-}
-
-
-/*
- * Reset a device at different levels (warm, cold or bus)
- *
- * @i2400ms: device descriptor
- * @reset_type: soft, warm or bus reset (I2400M_RT_WARM/SOFT/BUS)
- *
- * FIXME: not tested -- need to confirm expected effects
- *
- * Warm and cold resets get an SDIO reset if they fail (unimplemented)
- *
- * Warm reset:
- *
- * The device will be fully reset internally, but won't be
- * disconnected from the bus (so no reenumeration will
- * happen). Firmware upload will be necessary.
- *
- * The device will send a reboot barker that will trigger the driver
- * to reinitialize the state via __i2400m_dev_reset_handle.
- *
- *
- * Cold and bus reset:
- *
- * The device will be fully reset internally, disconnected from the
- * bus an a reenumeration will happen. Firmware upload will be
- * necessary. Thus, we don't do any locking or struct
- * reinitialization, as we are going to be fully disconnected and
- * reenumerated.
- *
- * Note we need to return -ENODEV if a warm reset was requested and we
- * had to resort to a bus reset. See i2400m_op_reset(), wimax_reset()
- * and wimax_dev->op_reset.
- *
- * WARNING: no driver state saved/fixed
- */
-static
-int i2400ms_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
-{
-	int result = 0;
-	struct i2400ms *i2400ms =
-		container_of(i2400m, struct i2400ms, i2400m);
-	struct device *dev = i2400m_dev(i2400m);
-	static const __le32 i2400m_WARM_BOOT_BARKER[4] = {
-		cpu_to_le32(I2400M_WARM_RESET_BARKER),
-		cpu_to_le32(I2400M_WARM_RESET_BARKER),
-		cpu_to_le32(I2400M_WARM_RESET_BARKER),
-		cpu_to_le32(I2400M_WARM_RESET_BARKER),
-	};
-	static const __le32 i2400m_COLD_BOOT_BARKER[4] = {
-		cpu_to_le32(I2400M_COLD_RESET_BARKER),
-		cpu_to_le32(I2400M_COLD_RESET_BARKER),
-		cpu_to_le32(I2400M_COLD_RESET_BARKER),
-		cpu_to_le32(I2400M_COLD_RESET_BARKER),
-	};
-
-	if (rt == I2400M_RT_WARM)
-		result = __i2400ms_send_barker(i2400ms, i2400m_WARM_BOOT_BARKER,
-					       sizeof(i2400m_WARM_BOOT_BARKER));
-	else if (rt == I2400M_RT_COLD)
-		result = __i2400ms_send_barker(i2400ms, i2400m_COLD_BOOT_BARKER,
-					       sizeof(i2400m_COLD_BOOT_BARKER));
-	else if (rt == I2400M_RT_BUS) {
-do_bus_reset:
-
-		i2400ms_bus_release(i2400m);
-
-		/* Wait for the device to settle */
-		msleep(40);
-
-		result =  i2400ms_bus_setup(i2400m);
-	} else
-		BUG();
-	if (result < 0 && rt != I2400M_RT_BUS) {
-		dev_err(dev, "%s reset failed (%d); trying SDIO reset\n",
-			rt == I2400M_RT_WARM ? "warm" : "cold", result);
-		rt = I2400M_RT_BUS;
-		goto do_bus_reset;
-	}
-	return result;
-}
-
-
-static
-void i2400ms_netdev_setup(struct net_device *net_dev)
-{
-	struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
-	struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
-	i2400ms_init(i2400ms);
-	i2400m_netdev_setup(net_dev);
-}
-
-
-/*
- * Debug levels control; see debug.h
- */
-struct d_level D_LEVEL[] = {
-	D_SUBMODULE_DEFINE(main),
-	D_SUBMODULE_DEFINE(tx),
-	D_SUBMODULE_DEFINE(rx),
-	D_SUBMODULE_DEFINE(fw),
-};
-size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
-
-
-#define __debugfs_register(prefix, name, parent)			\
-do {									\
-	result = d_level_register_debugfs(prefix, name, parent);	\
-	if (result < 0)							\
-		goto error;						\
-} while (0)
-
-
-static
-int i2400ms_debugfs_add(struct i2400ms *i2400ms)
-{
-	int result;
-	struct dentry *dentry = i2400ms->i2400m.wimax_dev.debugfs_dentry;
-
-	dentry = debugfs_create_dir("i2400m-sdio", dentry);
-	result = PTR_ERR(dentry);
-	if (IS_ERR(dentry)) {
-		if (result == -ENODEV)
-			result = 0;	/* No debugfs support */
-		goto error;
-	}
-	i2400ms->debugfs_dentry = dentry;
-	__debugfs_register("dl_", main, dentry);
-	__debugfs_register("dl_", tx, dentry);
-	__debugfs_register("dl_", rx, dentry);
-	__debugfs_register("dl_", fw, dentry);
-
-	return 0;
-
-error:
-	debugfs_remove_recursive(i2400ms->debugfs_dentry);
-	i2400ms->debugfs_dentry = NULL;
-	return result;
-}
-
-
-static struct device_type i2400ms_type = {
-	.name	= "wimax",
-};
-
-/*
- * Probe a i2400m interface and register it
- *
- * @func:    SDIO function
- * @id:      SDIO device ID
- * @returns: 0 if ok, < 0 errno code on error.
- *
- * Alloc a net device, initialize the bus-specific details and then
- * calls the bus-generic initialization routine. That will register
- * the wimax and netdev devices, upload the firmware [using
- * _bus_bm_*()], call _bus_dev_start() to finalize the setup of the
- * communication with the device and then will start to talk to it to
- * finnish setting it up.
- *
- * Initialization is tricky; some instances of the hw are packed with
- * others in a way that requires a third driver that enables the WiMAX
- * function. In those cases, we can't enable the SDIO function and
- * we'll return with -ENODEV. When the driver that enables the WiMAX
- * function does its thing, it has to do a bus_rescan_devices() on the
- * SDIO bus so this driver is called again to enumerate the WiMAX
- * function.
- */
-static
-int i2400ms_probe(struct sdio_func *func,
-		  const struct sdio_device_id *id)
-{
-	int result;
-	struct net_device *net_dev;
-	struct device *dev = &func->dev;
-	struct i2400m *i2400m;
-	struct i2400ms *i2400ms;
-
-	/* Allocate instance [calls i2400m_netdev_setup() on it]. */
-	result = -ENOMEM;
-	net_dev = alloc_netdev(sizeof(*i2400ms), "wmx%d",
-			       i2400ms_netdev_setup);
-	if (net_dev == NULL) {
-		dev_err(dev, "no memory for network device instance\n");
-		goto error_alloc_netdev;
-	}
-	SET_NETDEV_DEV(net_dev, dev);
-	SET_NETDEV_DEVTYPE(net_dev, &i2400ms_type);
-	i2400m = net_dev_to_i2400m(net_dev);
-	i2400ms = container_of(i2400m, struct i2400ms, i2400m);
-	i2400m->wimax_dev.net_dev = net_dev;
-	i2400ms->func = func;
-	sdio_set_drvdata(func, i2400ms);
-
-	i2400m->bus_tx_block_size = I2400MS_BLK_SIZE;
-	/*
-	 * Room required in the TX queue for SDIO message to accommodate
-	 * a smallest payload while allocating header space is 224 bytes,
-	 * which is the smallest message size(the block size 256 bytes)
-	 * minus the smallest message header size(32 bytes).
-	 */
-	i2400m->bus_tx_room_min = I2400MS_BLK_SIZE - I2400M_PL_ALIGN * 2;
-	i2400m->bus_pl_size_max = I2400MS_PL_SIZE_MAX;
-	i2400m->bus_setup = i2400ms_bus_setup;
-	i2400m->bus_dev_start = i2400ms_bus_dev_start;
-	i2400m->bus_dev_stop = NULL;
-	i2400m->bus_release = i2400ms_bus_release;
-	i2400m->bus_tx_kick = i2400ms_bus_tx_kick;
-	i2400m->bus_reset = i2400ms_bus_reset;
-	/* The iwmc3200-wimax sometimes requires the driver to try
-	 * hard when we paint it into a corner. */
-	i2400m->bus_bm_retries = I2400M_SDIO_BOOT_RETRIES;
-	i2400m->bus_bm_cmd_send = i2400ms_bus_bm_cmd_send;
-	i2400m->bus_bm_wait_for_ack = i2400ms_bus_bm_wait_for_ack;
-	i2400m->bus_fw_names = i2400ms_bus_fw_names;
-	i2400m->bus_bm_mac_addr_impaired = 1;
-	i2400m->bus_bm_pokes_table = &i2400ms_pokes[0];
-
-	switch (func->device) {
-	case SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX:
-	case SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX_2G5:
-		i2400ms->iwmc3200 = 1;
-		break;
-	default:
-		i2400ms->iwmc3200 = 0;
-	}
-
-	result = i2400m_setup(i2400m, I2400M_BRI_NO_REBOOT);
-	if (result < 0) {
-		dev_err(dev, "cannot setup device: %d\n", result);
-		goto error_setup;
-	}
-
-	result = i2400ms_debugfs_add(i2400ms);
-	if (result < 0) {
-		dev_err(dev, "cannot create SDIO debugfs: %d\n",
-			result);
-		goto error_debugfs_add;
-	}
-	return 0;
-
-error_debugfs_add:
-	i2400m_release(i2400m);
-error_setup:
-	sdio_set_drvdata(func, NULL);
-	free_netdev(net_dev);
-error_alloc_netdev:
-	return result;
-}
-
-
-static
-void i2400ms_remove(struct sdio_func *func)
-{
-	struct device *dev = &func->dev;
-	struct i2400ms *i2400ms = sdio_get_drvdata(func);
-	struct i2400m *i2400m = &i2400ms->i2400m;
-	struct net_device *net_dev = i2400m->wimax_dev.net_dev;
-
-	d_fnstart(3, dev, "SDIO func %p\n", func);
-	debugfs_remove_recursive(i2400ms->debugfs_dentry);
-	i2400ms->debugfs_dentry = NULL;
-	i2400m_release(i2400m);
-	sdio_set_drvdata(func, NULL);
-	free_netdev(net_dev);
-	d_fnend(3, dev, "SDIO func %p\n", func);
-}
-
-static
-const struct sdio_device_id i2400ms_sdio_ids[] = {
-	/* Intel: i2400m WiMAX (iwmc3200) over SDIO */
-	{ SDIO_DEVICE(SDIO_VENDOR_ID_INTEL,
-		      SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX) },
-	{ SDIO_DEVICE(SDIO_VENDOR_ID_INTEL,
-		      SDIO_DEVICE_ID_INTEL_IWMC3200WIMAX_2G5) },
-	{ /* end: all zeroes */ },
-};
-MODULE_DEVICE_TABLE(sdio, i2400ms_sdio_ids);
-
-
-static
-struct sdio_driver i2400m_sdio_driver = {
-	.name		= KBUILD_MODNAME,
-	.probe		= i2400ms_probe,
-	.remove		= i2400ms_remove,
-	.id_table	= i2400ms_sdio_ids,
-};
-
-
-static
-int __init i2400ms_driver_init(void)
-{
-	d_parse_params(D_LEVEL, D_LEVEL_SIZE, i2400ms_debug_params,
-		       "i2400m_sdio.debug");
-	return sdio_register_driver(&i2400m_sdio_driver);
-}
-module_init(i2400ms_driver_init);
-
-
-static
-void __exit i2400ms_driver_exit(void)
-{
-	sdio_unregister_driver(&i2400m_sdio_driver);
-}
-module_exit(i2400ms_driver_exit);
-
-
-MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>");
-MODULE_DESCRIPTION("Intel 2400M WiMAX networking for SDIO");
-MODULE_LICENSE("GPL");
-MODULE_FIRMWARE(I2400MS_FW_FILE_NAME);