diff options
Diffstat (limited to 'drivers/misc/iwmc3200top/main.c')
| -rw-r--r-- | drivers/misc/iwmc3200top/main.c | 678 |
1 files changed, 678 insertions, 0 deletions
diff --git a/drivers/misc/iwmc3200top/main.c b/drivers/misc/iwmc3200top/main.c new file mode 100644 index 00000000000..fafcaa481d7 --- /dev/null +++ b/drivers/misc/iwmc3200top/main.c @@ -0,0 +1,678 @@ +/* + * iwmc3200top - Intel Wireless MultiCom 3200 Top Driver + * drivers/misc/iwmc3200top/main.c + * + * Copyright (C) 2009 Intel Corporation. All rights reserved. + * + * 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. + * + * + * Author Name: Maxim Grabarnik <maxim.grabarnink@intel.com> + * - + * + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/debugfs.h> +#include <linux/mmc/sdio_ids.h> +#include <linux/mmc/sdio_func.h> +#include <linux/mmc/sdio.h> + +#include "iwmc3200top.h" +#include "log.h" +#include "fw-msg.h" +#include "debugfs.h" + + +#define DRIVER_DESCRIPTION "Intel(R) IWMC 3200 Top Driver" +#define DRIVER_COPYRIGHT "Copyright (c) 2008 Intel Corporation." + +#define DRIVER_VERSION "0.1.62" + +MODULE_DESCRIPTION(DRIVER_DESCRIPTION); +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR(DRIVER_COPYRIGHT); +MODULE_FIRMWARE(FW_NAME(FW_API_VER)); + +/* + * This workers main task is to wait for OP_OPR_ALIVE + * from TOP FW until ALIVE_MSG_TIMOUT timeout is elapsed. + * When OP_OPR_ALIVE received it will issue + * a call to "bus_rescan_devices". + */ +static void iwmct_rescan_worker(struct work_struct *ws) +{ + struct iwmct_priv *priv; + int ret; + + priv = container_of(ws, struct iwmct_priv, bus_rescan_worker); + + LOG_INFO(priv, FW_MSG, "Calling bus_rescan\n"); + + ret = bus_rescan_devices(priv->func->dev.bus); + if (ret < 0) + LOG_INFO(priv, FW_DOWNLOAD, "bus_rescan_devices FAILED!!!\n"); +} + +static void op_top_message(struct iwmct_priv *priv, struct top_msg *msg) +{ + switch (msg->hdr.opcode) { + case OP_OPR_ALIVE: + LOG_INFO(priv, FW_MSG, "Got ALIVE from device, wake rescan\n"); + queue_work(priv->bus_rescan_wq, &priv->bus_rescan_worker); + break; + default: + LOG_INFO(priv, FW_MSG, "Received msg opcode 0x%X\n", + msg->hdr.opcode); + break; + } +} + + +static void handle_top_message(struct iwmct_priv *priv, u8 *buf, int len) +{ + struct top_msg *msg; + + msg = (struct top_msg *)buf; + + if (msg->hdr.type != COMM_TYPE_D2H) { + LOG_ERROR(priv, FW_MSG, + "Message from TOP with invalid message type 0x%X\n", + msg->hdr.type); + return; + } + + if (len < sizeof(msg->hdr)) { + LOG_ERROR(priv, FW_MSG, + "Message from TOP is too short for message header " + "received %d bytes, expected at least %zd bytes\n", + len, sizeof(msg->hdr)); + return; + } + + if (len < le16_to_cpu(msg->hdr.length) + sizeof(msg->hdr)) { + LOG_ERROR(priv, FW_MSG, + "Message length (%d bytes) is shorter than " + "in header (%d bytes)\n", + len, le16_to_cpu(msg->hdr.length)); + return; + } + + switch (msg->hdr.category) { + case COMM_CATEGORY_OPERATIONAL: + op_top_message(priv, (struct top_msg *)buf); + break; + + case COMM_CATEGORY_DEBUG: + case COMM_CATEGORY_TESTABILITY: + case COMM_CATEGORY_DIAGNOSTICS: + iwmct_log_top_message(priv, buf, len); + break; + + default: + LOG_ERROR(priv, FW_MSG, + "Message from TOP with unknown category 0x%X\n", + msg->hdr.category); + break; + } +} + +int iwmct_send_hcmd(struct iwmct_priv *priv, u8 *cmd, u16 len) +{ + int ret; + u8 *buf; + + LOG_INFOEX(priv, FW_MSG, "Sending hcmd:\n"); + + /* add padding to 256 for IWMC */ + ((struct top_msg *)cmd)->hdr.flags |= CMD_FLAG_PADDING_256; + + LOG_HEXDUMP(FW_MSG, cmd, len); + + if (len > FW_HCMD_BLOCK_SIZE) { + LOG_ERROR(priv, FW_MSG, "size %d exceeded hcmd max size %d\n", + len, FW_HCMD_BLOCK_SIZE); + return -1; + } + + buf = kzalloc(FW_HCMD_BLOCK_SIZE, GFP_KERNEL); + if (!buf) { + LOG_ERROR(priv, FW_MSG, "kzalloc error, buf size %d\n", + FW_HCMD_BLOCK_SIZE); + return -1; + } + + memcpy(buf, cmd, len); + + sdio_claim_host(priv->func); + ret = sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR, buf, + FW_HCMD_BLOCK_SIZE); + sdio_release_host(priv->func); + + kfree(buf); + return ret; +} + +int iwmct_tx(struct iwmct_priv *priv, unsigned int addr, + void *src, int count) +{ + int ret; + + sdio_claim_host(priv->func); + ret = sdio_memcpy_toio(priv->func, addr, src, count); + sdio_release_host(priv->func); + + return ret; +} + +static void iwmct_irq_read_worker(struct work_struct *ws) +{ + struct iwmct_priv *priv; + struct iwmct_work_struct *read_req; + __le32 *buf = NULL; + int ret; + int iosize; + u32 barker; + bool is_barker; + + priv = container_of(ws, struct iwmct_priv, isr_worker); + + LOG_INFO(priv, IRQ, "enter iwmct_irq_read_worker %p\n", ws); + + /* --------------------- Handshake with device -------------------- */ + sdio_claim_host(priv->func); + + /* all list manipulations have to be protected by + * sdio_claim_host/sdio_release_host */ + if (list_empty(&priv->read_req_list)) { + LOG_ERROR(priv, IRQ, "read_req_list empty in read worker\n"); + goto exit_release; + } + + read_req = list_entry(priv->read_req_list.next, + struct iwmct_work_struct, list); + + list_del(&read_req->list); + iosize = read_req->iosize; + kfree(read_req); + + buf = kzalloc(iosize, GFP_KERNEL); + if (!buf) { + LOG_ERROR(priv, IRQ, "kzalloc error, buf size %d\n", iosize); + goto exit_release; + } + + LOG_INFO(priv, IRQ, "iosize=%d, buf=%p, func=%d\n", + iosize, buf, priv->func->num); + + /* read from device */ + ret = sdio_memcpy_fromio(priv->func, buf, IWMC_SDIO_DATA_ADDR, iosize); + if (ret) { + LOG_ERROR(priv, IRQ, "error %d reading buffer\n", ret); + goto exit_release; + } + + LOG_HEXDUMP(IRQ, (u8 *)buf, iosize); + + barker = le32_to_cpu(buf[0]); + + /* Verify whether it's a barker and if not - treat as regular Rx */ + if (barker == IWMC_BARKER_ACK || + (barker & BARKER_DNLOAD_BARKER_MSK) == IWMC_BARKER_REBOOT) { + + /* Valid Barker is equal on first 4 dwords */ + is_barker = (buf[1] == buf[0]) && + (buf[2] == buf[0]) && + (buf[3] == buf[0]); + + if (!is_barker) { + LOG_WARNING(priv, IRQ, + "Potentially inconsistent barker " + "%08X_%08X_%08X_%08X\n", + le32_to_cpu(buf[0]), le32_to_cpu(buf[1]), + le32_to_cpu(buf[2]), le32_to_cpu(buf[3])); + } + } else { + is_barker = false; + } + + /* Handle Top CommHub message */ + if (!is_barker) { + sdio_release_host(priv->func); + handle_top_message(priv, (u8 *)buf, iosize); + goto exit; + } else if (barker == IWMC_BARKER_ACK) { /* Handle barkers */ + if (atomic_read(&priv->dev_sync) == 0) { + LOG_ERROR(priv, IRQ, + "ACK barker arrived out-of-sync\n"); + goto exit_release; + } + + /* Continuing to FW download (after Sync is completed)*/ + atomic_set(&priv->dev_sync, 0); + LOG_INFO(priv, IRQ, "ACK barker arrived " + "- starting FW download\n"); + } else { /* REBOOT barker */ + LOG_INFO(priv, IRQ, "Recieved reboot barker: %x\n", barker); + priv->barker = barker; + + if (barker & BARKER_DNLOAD_SYNC_MSK) { + /* Send the same barker back */ + ret = sdio_memcpy_toio(priv->func, IWMC_SDIO_DATA_ADDR, + buf, iosize); + if (ret) { + LOG_ERROR(priv, IRQ, + "error %d echoing barker\n", ret); + goto exit_release; + } + LOG_INFO(priv, IRQ, "Echoing barker to device\n"); + atomic_set(&priv->dev_sync, 1); + goto exit_release; + } + + /* Continuing to FW download (without Sync) */ + LOG_INFO(priv, IRQ, "No sync requested " + "- starting FW download\n"); + } + + sdio_release_host(priv->func); + + + LOG_INFO(priv, IRQ, "barker download request 0x%x is:\n", priv->barker); + LOG_INFO(priv, IRQ, "******* Top FW %s requested ********\n", + (priv->barker & BARKER_DNLOAD_TOP_MSK) ? "was" : "not"); + LOG_INFO(priv, IRQ, "******* GPS FW %s requested ********\n", + (priv->barker & BARKER_DNLOAD_GPS_MSK) ? "was" : "not"); + LOG_INFO(priv, IRQ, "******* BT FW %s requested ********\n", + (priv->barker & BARKER_DNLOAD_BT_MSK) ? "was" : "not"); + + if (priv->dbg.fw_download) + iwmct_fw_load(priv); + else + LOG_ERROR(priv, IRQ, "FW download not allowed\n"); + + goto exit; + +exit_release: + sdio_release_host(priv->func); +exit: + kfree(buf); + LOG_INFO(priv, IRQ, "exit iwmct_irq_read_worker\n"); +} + +static void iwmct_irq(struct sdio_func *func) +{ + struct iwmct_priv *priv; + int val, ret; + int iosize; + int addr = IWMC_SDIO_INTR_GET_SIZE_ADDR; + struct iwmct_work_struct *read_req; + + priv = sdio_get_drvdata(func); + + LOG_INFO(priv, IRQ, "enter iwmct_irq\n"); + + /* read the function's status register */ + val = sdio_readb(func, IWMC_SDIO_INTR_STATUS_ADDR, &ret); + + LOG_INFO(priv, IRQ, "iir value = %d, ret=%d\n", val, ret); + + if (!val) { + LOG_ERROR(priv, IRQ, "iir = 0, exiting ISR\n"); + goto exit_clear_intr; + } + + + /* + * read 2 bytes of the transaction size + * IMPORTANT: sdio transaction size has to be read before clearing + * sdio interrupt!!! + */ + val = sdio_readb(priv->func, addr++, &ret); + iosize = val; + val = sdio_readb(priv->func, addr++, &ret); + iosize += val << 8; + + LOG_INFO(priv, IRQ, "READ size %d\n", iosize); + + if (iosize == 0) { + LOG_ERROR(priv, IRQ, "READ size %d, exiting ISR\n", iosize); + goto exit_clear_intr; + } + + /* allocate a work structure to pass iosize to the worker */ + read_req = kzalloc(sizeof(struct iwmct_work_struct), GFP_KERNEL); + if (!read_req) { + LOG_ERROR(priv, IRQ, "failed to allocate read_req, exit ISR\n"); + goto exit_clear_intr; + } + + INIT_LIST_HEAD(&read_req->list); + read_req->iosize = iosize; + + list_add_tail(&priv->read_req_list, &read_req->list); + + /* clear the function's interrupt request bit (write 1 to clear) */ + sdio_writeb(func, 1, IWMC_SDIO_INTR_CLEAR_ADDR, &ret); + + queue_work(priv->wq, &priv->isr_worker); + + LOG_INFO(priv, IRQ, "exit iwmct_irq\n"); + + return; + +exit_clear_intr: + /* clear the function's interrupt request bit (write 1 to clear) */ + sdio_writeb(func, 1, IWMC_SDIO_INTR_CLEAR_ADDR, &ret); +} + + +static int blocks; +module_param(blocks, int, 0604); +MODULE_PARM_DESC(blocks, "max_blocks_to_send"); + +static int dump; +module_param(dump, bool, 0604); +MODULE_PARM_DESC(dump, "dump_hex_content"); + +static int jump = 1; +module_param(jump, bool, 0604); + +static int direct = 1; +module_param(direct, bool, 0604); + +static int checksum = 1; +module_param(checksum, bool, 0604); + +static int fw_download = 1; +module_param(fw_download, bool, 0604); + +static int block_size = IWMC_SDIO_BLK_SIZE; +module_param(block_size, int, 0404); + +static int download_trans_blks = IWMC_DEFAULT_TR_BLK; +module_param(download_trans_blks, int, 0604); + +static int rubbish_barker; +module_param(rubbish_barker, bool, 0604); + +#ifdef CONFIG_IWMC3200TOP_DEBUG +static int log_level[LOG_SRC_MAX]; +static unsigned int log_level_argc; +module_param_array(log_level, int, &log_level_argc, 0604); +MODULE_PARM_DESC(log_level, "log_level"); + +static int log_level_fw[FW_LOG_SRC_MAX]; +static unsigned int log_level_fw_argc; +module_param_array(log_level_fw, int, &log_level_fw_argc, 0604); +MODULE_PARM_DESC(log_level_fw, "log_level_fw"); +#endif + +void iwmct_dbg_init_params(struct iwmct_priv *priv) +{ +#ifdef CONFIG_IWMC3200TOP_DEBUG + int i; + + for (i = 0; i < log_level_argc; i++) { + dev_notice(&priv->func->dev, "log_level[%d]=0x%X\n", + i, log_level[i]); + iwmct_log_set_filter((log_level[i] >> 8) & 0xFF, + log_level[i] & 0xFF); + } + for (i = 0; i < log_level_fw_argc; i++) { + dev_notice(&priv->func->dev, "log_level_fw[%d]=0x%X\n", + i, log_level_fw[i]); + iwmct_log_set_fw_filter((log_level_fw[i] >> 8) & 0xFF, + log_level_fw[i] & 0xFF); + } +#endif + + priv->dbg.blocks = blocks; + LOG_INFO(priv, INIT, "blocks=%d\n", blocks); + priv->dbg.dump = (bool)dump; + LOG_INFO(priv, INIT, "dump=%d\n", dump); + priv->dbg.jump = (bool)jump; + LOG_INFO(priv, INIT, "jump=%d\n", jump); + priv->dbg.direct = (bool)direct; + LOG_INFO(priv, INIT, "direct=%d\n", direct); + priv->dbg.checksum = (bool)checksum; + LOG_INFO(priv, INIT, "checksum=%d\n", checksum); + priv->dbg.fw_download = (bool)fw_download; + LOG_INFO(priv, INIT, "fw_download=%d\n", fw_download); + priv->dbg.block_size = block_size; + LOG_INFO(priv, INIT, "block_size=%d\n", block_size); + priv->dbg.download_trans_blks = download_trans_blks; + LOG_INFO(priv, INIT, "download_trans_blks=%d\n", download_trans_blks); +} + +/***************************************************************************** + * + * sysfs attributes + * + *****************************************************************************/ +static ssize_t show_iwmct_fw_version(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct iwmct_priv *priv = dev_get_drvdata(d); + return sprintf(buf, "%s\n", priv->dbg.label_fw); +} +static DEVICE_ATTR(cc_label_fw, S_IRUGO, show_iwmct_fw_version, NULL); + +#ifdef CONFIG_IWMC3200TOP_DEBUG +static DEVICE_ATTR(log_level, S_IWUSR | S_IRUGO, + show_iwmct_log_level, store_iwmct_log_level); +static DEVICE_ATTR(log_level_fw, S_IWUSR | S_IRUGO, + show_iwmct_log_level_fw, store_iwmct_log_level_fw); +#endif + +static struct attribute *iwmct_sysfs_entries[] = { + &dev_attr_cc_label_fw.attr, +#ifdef CONFIG_IWMC3200TOP_DEBUG + &dev_attr_log_level.attr, + &dev_attr_log_level_fw.attr, +#endif + NULL +}; + +static struct attribute_group iwmct_attribute_group = { + .name = NULL, /* put in device directory */ + .attrs = iwmct_sysfs_entries, +}; + + +static int iwmct_probe(struct sdio_func *func, + const struct sdio_device_id *id) +{ + struct iwmct_priv *priv; + int ret; + int val = 1; + int addr = IWMC_SDIO_INTR_ENABLE_ADDR; + + dev_dbg(&func->dev, "enter iwmct_probe\n"); + + dev_dbg(&func->dev, "IRQ polling period id %u msecs, HZ is %d\n", + jiffies_to_msecs(2147483647), HZ); + + priv = kzalloc(sizeof(struct iwmct_priv), GFP_KERNEL); + if (!priv) { + dev_err(&func->dev, "kzalloc error\n"); + return -ENOMEM; + } + priv->func = func; + sdio_set_drvdata(func, priv); + + + /* create drivers work queue */ + priv->wq = create_workqueue(DRV_NAME "_wq"); + priv->bus_rescan_wq = create_workqueue(DRV_NAME "_rescan_wq"); + INIT_WORK(&priv->bus_rescan_worker, iwmct_rescan_worker); + INIT_WORK(&priv->isr_worker, iwmct_irq_read_worker); + + init_waitqueue_head(&priv->wait_q); + + sdio_claim_host(func); + /* FIXME: Remove after it is fixed in the Boot ROM upgrade */ + func->enable_timeout = 10; + + /* In our HW, setting the block size also wakes up the boot rom. */ + ret = sdio_set_block_size(func, priv->dbg.block_size); + if (ret) { + LOG_ERROR(priv, INIT, + "sdio_set_block_size() failure: %d\n", ret); + goto error_sdio_enable; + } + + ret = sdio_enable_func(func); + if (ret) { + LOG_ERROR(priv, INIT, "sdio_enable_func() failure: %d\n", ret); + goto error_sdio_enable; + } + + /* init reset and dev_sync states */ + atomic_set(&priv->reset, 0); + atomic_set(&priv->dev_sync, 0); + + /* init read req queue */ + INIT_LIST_HEAD(&priv->read_req_list); + + /* process configurable parameters */ + iwmct_dbg_init_params(priv); + ret = sysfs_create_group(&func->dev.kobj, &iwmct_attribute_group); + if (ret) { + LOG_ERROR(priv, INIT, "Failed to register attributes and " + "initialize module_params\n"); + goto error_dev_attrs; + } + + iwmct_dbgfs_register(priv, DRV_NAME); + + if (!priv->dbg.direct && priv->dbg.download_trans_blks > 8) { + LOG_INFO(priv, INIT, + "Reducing transaction to 8 blocks = 2K (from %d)\n", + priv->dbg.download_trans_blks); + priv->dbg.download_trans_blks = 8; + } + priv->trans_len = priv->dbg.download_trans_blks * priv->dbg.block_size; + LOG_INFO(priv, INIT, "Transaction length = %d\n", priv->trans_len); + + ret = sdio_claim_irq(func, iwmct_irq); + if (ret) { + LOG_ERROR(priv, INIT, "sdio_claim_irq() failure: %d\n", ret); + goto error_claim_irq; + } + + + /* Enable function's interrupt */ + sdio_writeb(priv->func, val, addr, &ret); + if (ret) { + LOG_ERROR(priv, INIT, "Failure writing to " + "Interrupt Enable Register (%d): %d\n", addr, ret); + goto error_enable_int; + } + + sdio_release_host(func); + + LOG_INFO(priv, INIT, "exit iwmct_probe\n"); + + return ret; + +error_enable_int: + sdio_release_irq(func); +error_claim_irq: + sdio_disable_func(func); +error_dev_attrs: + iwmct_dbgfs_unregister(priv->dbgfs); + sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group); +error_sdio_enable: + sdio_release_host(func); + return ret; +} + +static void iwmct_remove(struct sdio_func *func) +{ + struct iwmct_work_struct *read_req; + struct iwmct_priv *priv = sdio_get_drvdata(func); + + priv = sdio_get_drvdata(func); + + LOG_INFO(priv, INIT, "enter\n"); + + sdio_claim_host(func); + sdio_release_irq(func); + sdio_release_host(func); + + /* Safely destroy osc workqueue */ + destroy_workqueue(priv->bus_rescan_wq); + destroy_workqueue(priv->wq); + + sdio_claim_host(func); + sdio_disable_func(func); + sysfs_remove_group(&func->dev.kobj, &iwmct_attribute_group); + iwmct_dbgfs_unregister(priv->dbgfs); + sdio_release_host(func); + + /* free read requests */ + while (!list_empty(&priv->read_req_list)) { + read_req = list_entry(priv->read_req_list.next, + struct iwmct_work_struct, list); + + list_del(&read_req->list); + kfree(read_req); + } + + kfree(priv); +} + + +static const struct sdio_device_id iwmct_ids[] = { + /* Intel Wireless MultiCom 3200 Top Driver */ + { SDIO_DEVICE(SDIO_VENDOR_ID_INTEL, 0x1404)}, + { }, /* Terminating entry */ +}; + +MODULE_DEVICE_TABLE(sdio, iwmct_ids); + +static struct sdio_driver iwmct_driver = { + .probe = iwmct_probe, + .remove = iwmct_remove, + .name = DRV_NAME, + .id_table = iwmct_ids, +}; + +static int __init iwmct_init(void) +{ + int rc; + + /* Default log filter settings */ + iwmct_log_set_filter(LOG_SRC_ALL, LOG_SEV_FILTER_RUNTIME); + iwmct_log_set_filter(LOG_SRC_FW_MSG, LOG_SEV_FILTER_ALL); + iwmct_log_set_fw_filter(LOG_SRC_ALL, FW_LOG_SEV_FILTER_RUNTIME); + + rc = sdio_register_driver(&iwmct_driver); + + return rc; +} + +static void __exit iwmct_exit(void) +{ + sdio_unregister_driver(&iwmct_driver); +} + +module_init(iwmct_init); +module_exit(iwmct_exit); + |