diff options
Diffstat (limited to 'drivers/net/wimax/i2400m/sdio.c')
| -rw-r--r-- | drivers/net/wimax/i2400m/sdio.c | 602 |
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); |