diff options
Diffstat (limited to 'drivers/serial/jsm/jsm_driver.c')
| -rw-r--r-- | drivers/serial/jsm/jsm_driver.c | 404 |
1 files changed, 404 insertions, 0 deletions
diff --git a/drivers/serial/jsm/jsm_driver.c b/drivers/serial/jsm/jsm_driver.c new file mode 100644 index 00000000000..d4847d4f147 --- /dev/null +++ b/drivers/serial/jsm/jsm_driver.c @@ -0,0 +1,404 @@ +/************************************************************************ + * Copyright 2003 Digi International (www.digi.com) + * + * Copyright (C) 2004 IBM 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 as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; 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., 59 * Temple Place - Suite 330, Boston, + * MA 02111-1307, USA. + * + * Contact Information: + * Scott H Kilau <Scott_Kilau@digi.com> + * Wendy Xiong <wendyx@us.ltcfwd.linux.ibm.com> + * + ***********************************************************************/ +#include <linux/moduleparam.h> +#include <linux/pci.h> + +#include "jsm.h" + +MODULE_AUTHOR("Digi International, http://www.digi.com"); +MODULE_DESCRIPTION("Driver for the Digi International Neo PCI based product line"); +MODULE_SUPPORTED_DEVICE("jsm"); + +#define JSM_DRIVER_NAME "jsm" +#define NR_PORTS 32 +#define JSM_MINOR_START 0 + +struct uart_driver jsm_uart_driver = { + .owner = THIS_MODULE, + .driver_name = JSM_DRIVER_NAME, + .dev_name = "ttyn", + .major = 253, + .minor = JSM_MINOR_START, + .nr = NR_PORTS, + .cons = NULL, +}; + +int jsm_debug; +int jsm_rawreadok; +module_param(jsm_debug, int, 0); +module_param(jsm_rawreadok, int, 0); +MODULE_PARM_DESC(jsm_debug, "Driver debugging level"); +MODULE_PARM_DESC(jsm_rawreadok, "Bypass flip buffers on input"); + +/* + * Globals + */ +int jsm_driver_state = DRIVER_INITIALIZED; +spinlock_t jsm_board_head_lock = SPIN_LOCK_UNLOCKED; +LIST_HEAD(jsm_board_head); + +static struct pci_device_id jsm_pci_tbl[] = { + { PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 }, + { PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 }, + { PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 }, + { PCI_DEVICE (PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 }, + { 0,} /* 0 terminated list. */ +}; +MODULE_DEVICE_TABLE(pci, jsm_pci_tbl); + +static struct board_id jsm_Ids[] = { + { PCI_DEVICE_NEO_2DB9_PCI_NAME, 2 }, + { PCI_DEVICE_NEO_2DB9PRI_PCI_NAME, 2 }, + { PCI_DEVICE_NEO_2RJ45_PCI_NAME, 2 }, + { PCI_DEVICE_NEO_2RJ45PRI_PCI_NAME, 2 }, + { NULL, 0 } +}; + +char *jsm_driver_state_text[] = { + "Driver Initialized", + "Driver Ready." +}; + +static int jsm_finalize_board_init(struct jsm_board *brd) +{ + int rc = 0; + + jsm_printk(INIT, INFO, &brd->pci_dev, "start\n"); + + if (brd->irq) { + rc = request_irq(brd->irq, brd->bd_ops->intr, SA_INTERRUPT|SA_SHIRQ, "JSM", brd); + + if (rc) { + printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq); + brd->state = BOARD_FAILED; + brd->dpastatus = BD_NOFEP; + rc = -ENODEV; + } else + jsm_printk(INIT, INFO, &brd->pci_dev, + "Requested and received usage of IRQ %d\n", brd->irq); + } + return rc; +} + +/* + * jsm_found_board() + * + * A board has been found, init it. + */ +static int jsm_found_board(struct pci_dev *pdev, int id) +{ + struct jsm_board *brd; + int i = 0; + int rc = 0; + struct list_head *tmp; + struct jsm_board *cur_board_entry; + unsigned long lock_flags; + int adapter_count = 0; + int retval; + + brd = kmalloc(sizeof(struct jsm_board), GFP_KERNEL); + if (!brd) { + dev_err(&pdev->dev, "memory allocation for board structure failed\n"); + return -ENOMEM; + } + memset(brd, 0, sizeof(struct jsm_board)); + + spin_lock_irqsave(&jsm_board_head_lock, lock_flags); + list_for_each(tmp, &jsm_board_head) { + cur_board_entry = + list_entry(tmp, struct jsm_board, + jsm_board_entry); + if (cur_board_entry->boardnum != adapter_count) { + break; + } + adapter_count++; + } + + list_add_tail(&brd->jsm_board_entry, &jsm_board_head); + spin_unlock_irqrestore(&jsm_board_head_lock, lock_flags); + + /* store the info for the board we've found */ + brd->boardnum = adapter_count; + brd->pci_dev = pdev; + brd->name = jsm_Ids[id].name; + brd->maxports = jsm_Ids[id].maxports; + brd->dpastatus = BD_NOFEP; + init_waitqueue_head(&brd->state_wait); + + spin_lock_init(&brd->bd_lock); + spin_lock_init(&brd->bd_intr_lock); + + brd->state = BOARD_FOUND; + + for (i = 0; i < brd->maxports; i++) + brd->channels[i] = NULL; + + /* store which revision we have */ + pci_read_config_byte(pdev, PCI_REVISION_ID, &brd->rev); + + brd->irq = pdev->irq; + + switch(brd->pci_dev->device) { + + case PCI_DEVICE_ID_NEO_2DB9: + case PCI_DEVICE_ID_NEO_2DB9PRI: + case PCI_DEVICE_ID_NEO_2RJ45: + case PCI_DEVICE_ID_NEO_2RJ45PRI: + + /* + * This chip is set up 100% when we get to it. + * No need to enable global interrupts or anything. + */ + brd->dpatype = T_NEO | T_PCIBUS; + + jsm_printk(INIT, INFO, &brd->pci_dev, + "jsm_found_board - NEO adapter\n"); + + /* get the PCI Base Address Registers */ + brd->membase = pci_resource_start(pdev, 0); + brd->membase_end = pci_resource_end(pdev, 0); + + if (brd->membase & 1) + brd->membase &= ~3; + else + brd->membase &= ~15; + + /* Assign the board_ops struct */ + brd->bd_ops = &jsm_neo_ops; + + brd->bd_uart_offset = 0x200; + brd->bd_dividend = 921600; + + brd->re_map_membase = ioremap(brd->membase, 0x1000); + jsm_printk(INIT, INFO, &brd->pci_dev, + "remapped mem: 0x%p\n", brd->re_map_membase); + if (!brd->re_map_membase) { + kfree(brd); + dev_err(&pdev->dev, "card has no PCI Memory resources, failing board.\n"); + return -ENOMEM; + } + break; + + default: + dev_err(&pdev->dev, "Did not find any compatible Neo or Classic PCI boards in system.\n"); + kfree(brd); + return -ENXIO; + } + + /* + * Do tty device initialization. + */ + rc = jsm_finalize_board_init(brd); + if (rc < 0) { + dev_err(&pdev->dev, "Can't finalize board init (%d)\n", rc); + brd->state = BOARD_FAILED; + retval = -ENXIO; + goto failed0; + } + + rc = jsm_tty_init(brd); + if (rc < 0) { + dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc); + brd->state = BOARD_FAILED; + retval = -ENXIO; + goto failed1; + } + + rc = jsm_uart_port_init(brd); + if (rc < 0) { + dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc); + brd->state = BOARD_FAILED; + retval = -ENXIO; + goto failed1; + } + + brd->state = BOARD_READY; + brd->dpastatus = BD_RUNNING; + + /* Log the information about the board */ + dev_info(&pdev->dev, "board %d: %s (rev %d), irq %d\n",adapter_count, brd->name, brd->rev, brd->irq); + + /* + * allocate flip buffer for board. + * + * Okay to malloc with GFP_KERNEL, we are not at interrupt + * context, and there are no locks held. + */ + brd->flipbuf = kmalloc(MYFLIPLEN, GFP_KERNEL); + if (!brd->flipbuf) { + dev_err(&pdev->dev, "memory allocation for flipbuf failed\n"); + brd->state = BOARD_FAILED; + retval = -ENOMEM; + goto failed1; + } + memset(brd->flipbuf, 0, MYFLIPLEN); + + jsm_create_driver_sysfiles(pdev->dev.driver); + + wake_up_interruptible(&brd->state_wait); + return 0; +failed1: + free_irq(brd->irq, brd); +failed0: + kfree(brd); + iounmap(brd->re_map_membase); + return retval; +} + +/* returns count (>= 0), or negative on error */ +static int jsm_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + int rc; + + rc = pci_enable_device(pdev); + if (rc) { + dev_err(&pdev->dev, "Device enable FAILED\n"); + return rc; + } + + if ((rc = pci_request_regions(pdev, "jsm"))) { + dev_err(&pdev->dev, "pci_request_region FAILED\n"); + pci_disable_device(pdev); + return rc; + } + + if ((rc = jsm_found_board(pdev, ent->driver_data))) { + dev_err(&pdev->dev, "jsm_found_board FAILED\n"); + pci_release_regions(pdev); + pci_disable_device(pdev); + return rc; + } + return rc; +} + + +/* + * jsm_cleanup_board() + * + * Free all the memory associated with a board + */ +static void jsm_cleanup_board(struct jsm_board *brd) +{ + int i = 0; + + free_irq(brd->irq, brd); + iounmap(brd->re_map_membase); + + /* Free all allocated channels structs */ + for (i = 0; i < brd->maxports; i++) { + if (brd->channels[i]) { + if (brd->channels[i]->ch_rqueue) + kfree(brd->channels[i]->ch_rqueue); + if (brd->channels[i]->ch_equeue) + kfree(brd->channels[i]->ch_equeue); + if (brd->channels[i]->ch_wqueue) + kfree(brd->channels[i]->ch_wqueue); + kfree(brd->channels[i]); + } + } + + pci_release_regions(brd->pci_dev); + pci_disable_device(brd->pci_dev); + kfree(brd->flipbuf); + kfree(brd); +} + +static void jsm_remove_one(struct pci_dev *dev) +{ + unsigned long lock_flags; + struct list_head *tmp; + struct jsm_board *brd; + + spin_lock_irqsave(&jsm_board_head_lock, lock_flags); + list_for_each(tmp, &jsm_board_head) { + brd = list_entry(tmp, struct jsm_board, + jsm_board_entry); + if ( brd != NULL && brd->pci_dev == dev) { + jsm_remove_uart_port(brd); + jsm_cleanup_board(brd); + list_del(&brd->jsm_board_entry); + break; + } + } + spin_unlock_irqrestore(&jsm_board_head_lock, lock_flags); + return; +} + +struct pci_driver jsm_driver = { + .name = "jsm", + .probe = jsm_init_one, + .id_table = jsm_pci_tbl, + .remove = __devexit_p(jsm_remove_one), +}; + +/* + * jsm_init_module() + * + * Module load. This is where it all starts. + */ +static int __init jsm_init_module(void) +{ + int rc = 0; + + printk(KERN_INFO "%s, Digi International Part Number %s\n", + JSM_VERSION, JSM_VERSION); + + /* + * Initialize global stuff + */ + + rc = uart_register_driver(&jsm_uart_driver); + if (rc < 0) { + return rc; + } + + rc = pci_register_driver(&jsm_driver); + if (rc < 0) { + uart_unregister_driver(&jsm_uart_driver); + return rc; + } + jsm_driver_state = DRIVER_READY; + + return rc; +} + +module_init(jsm_init_module); + +/* + * jsm_exit_module() + * + * Module unload. This is where it all ends. + */ +static void __exit jsm_exit_module(void) +{ + jsm_remove_driver_sysfiles(&jsm_driver.driver); + + pci_unregister_driver(&jsm_driver); + + uart_unregister_driver(&jsm_uart_driver); +} +module_exit(jsm_exit_module); +MODULE_LICENSE("GPL"); |