[net-next-2.6.git] / drivers / serial / jsm / jsm_driver.c

/************************************************************************
 * 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.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_LICENSE("GPL");
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		= 0,
	.minor		= JSM_MINOR_START,
	.nr		= NR_PORTS,
};

int jsm_debug;
module_param(jsm_debug, int, 0);
MODULE_PARM_DESC(jsm_debug, "Driver debugging level");

static int jsm_probe_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	int rc = 0;
	struct jsm_board *brd;
	static int adapter_count = 0;
	int retval;

	rc = pci_enable_device(pdev);
	if (rc) {
		dev_err(&pdev->dev, "Device enable FAILED\n");
		goto out;
	}

	rc = pci_request_regions(pdev, "jsm");
	if (rc) {
		dev_err(&pdev->dev, "pci_request_region FAILED\n");
		goto out_disable_device;
	}

	brd = kzalloc(sizeof(struct jsm_board), GFP_KERNEL);
	if (!brd) {
		dev_err(&pdev->dev,
			"memory allocation for board structure failed\n");
		rc = -ENOMEM;
		goto out_release_regions;
	}

	/* store the info for the board we've found */
	brd->boardnum = adapter_count++;
	brd->pci_dev = pdev;
	if (pdev->device == PCIE_DEVICE_ID_NEO_4_IBM)
		brd->maxports = 4;
	else
		brd->maxports = 2;

	spin_lock_init(&brd->bd_lock);
	spin_lock_init(&brd->bd_intr_lock);

	/* store which revision we have */
	brd->rev = pdev->revision;

	brd->irq = pdev->irq;

	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);
	if (!brd->re_map_membase) {
		dev_err(&pdev->dev,
			"card has no PCI Memory resources, "
			"failing board.\n");
		rc = -ENOMEM;
		goto out_kfree_brd;
	}

	rc = request_irq(brd->irq, brd->bd_ops->intr,
			IRQF_DISABLED|IRQF_SHARED, "JSM", brd);
	if (rc) {
		printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
		goto out_iounmap;
	}

	rc = jsm_tty_init(brd);
	if (rc < 0) {
		dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
		retval = -ENXIO;
		goto out_free_irq;
	}

	rc = jsm_uart_port_init(brd);
	if (rc < 0) {
		/* XXX: leaking all resources from jsm_tty_init here! */
		dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
		retval = -ENXIO;
		goto out_free_irq;
	}

	/* Log the information about the board */
	dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
			adapter_count, 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 = kzalloc(MYFLIPLEN, GFP_KERNEL);
	if (!brd->flipbuf) {
		/* XXX: leaking all resources from jsm_tty_init and
		 	jsm_uart_port_init here! */
		dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
		retval = -ENOMEM;
		goto out_free_irq;
	}

	pci_set_drvdata(pdev, brd);

	return 0;
 out_free_irq:
	free_irq(brd->irq, brd);
 out_iounmap:
	iounmap(brd->re_map_membase);
 out_kfree_brd:
	kfree(brd);
 out_release_regions:
	pci_release_regions(pdev);
 out_disable_device:
	pci_disable_device(pdev);
 out:
	return rc;
}

static void __devexit jsm_remove_one(struct pci_dev *pdev)
{
	struct jsm_board *brd = pci_get_drvdata(pdev);
	int i = 0;

	jsm_remove_uart_port(brd);

	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]) {
			kfree(brd->channels[i]->ch_rqueue);
			kfree(brd->channels[i]->ch_equeue);
			kfree(brd->channels[i]->ch_wqueue);
			kfree(brd->channels[i]);
		}
	}

	pci_release_regions(pdev);
	pci_disable_device(pdev);
	kfree(brd->flipbuf);
	kfree(brd);
}

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 },
	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
	{ 0, }
};
MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);

static struct pci_driver jsm_driver = {
	.name		= "jsm",
	.id_table	= jsm_pci_tbl,
	.probe		= jsm_probe_one,
	.remove		= __devexit_p(jsm_remove_one),
};

static int __init jsm_init_module(void)
{
	int rc;

	rc = uart_register_driver(&jsm_uart_driver);
	if (!rc) {
		rc = pci_register_driver(&jsm_driver);
		if (rc)
			uart_unregister_driver(&jsm_uart_driver);
	}
	return rc;
}

static void __exit jsm_exit_module(void)
{
	pci_unregister_driver(&jsm_driver);
	uart_unregister_driver(&jsm_uart_driver);
}

module_init(jsm_init_module);
module_exit(jsm_exit_module);
Commit	Line	Data
1da177e4 LT	1	/************************************************************************
	2	* Copyright 2003 Digi International (www.digi.com)
	3	*
	4	* Copyright (C) 2004 IBM Corporation. All rights reserved.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2, or (at your option)
	9	* any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the
	13	* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
	14	* PURPOSE. See the GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 * Temple Place - Suite 330, Boston,
	19	* MA 02111-1307, USA.
	20	*
	21	* Contact Information:
	22	* Scott H Kilau <Scott_Kilau@digi.com>
2a08b4e9	23	* Wendy Xiong <wendyx@us.ibm.com>
1da177e4	24	*
c2236956	25	*
1da177e4 LT	26	***********************************************************************/
	27	#include <linux/moduleparam.h>
	28	#include <linux/pci.h>
	29
	30	#include "jsm.h"
	31
	32	MODULE_AUTHOR("Digi International, http://www.digi.com");
614a7d6a CH	33	MODULE_DESCRIPTION("Driver for the Digi International "
	34	"Neo PCI based product line");
	35	MODULE_LICENSE("GPL");
1da177e4 LT	36	MODULE_SUPPORTED_DEVICE("jsm");
	37
	38	#define JSM_DRIVER_NAME "jsm"
	39	#define NR_PORTS 32
	40	#define JSM_MINOR_START 0
	41
	42	struct uart_driver jsm_uart_driver = {
	43	.owner = THIS_MODULE,
	44	.driver_name = JSM_DRIVER_NAME,
	45	.dev_name = "ttyn",
9539c1d4	46	.major = 0,
1da177e4 LT	47	.minor = JSM_MINOR_START,
1da177e4 LT	48	.nr = NR_PORTS,
1da177e4 LT	49	};
	50
	51	int jsm_debug;
1da177e4	52	module_param(jsm_debug, int, 0);
1da177e4	53	MODULE_PARM_DESC(jsm_debug, "Driver debugging level");
1da177e4	54
614a7d6a	55	static int jsm_probe_one(struct pci_dev pdev, const struct pci_device_id ent)
1da177e4 LT	56	{
1da177e4 LT	57	int rc = 0;
614a7d6a CH	58	struct jsm_board *brd;
	59	static int adapter_count = 0;
	60	int retval;
1da177e4	61
614a7d6a CH	62	rc = pci_enable_device(pdev);
	63	if (rc) {
	64	dev_err(&pdev->dev, "Device enable FAILED\n");
	65	goto out;
1da177e4	66	}
1da177e4	67
614a7d6a CH	68	rc = pci_request_regions(pdev, "jsm");
	69	if (rc) {
	70	dev_err(&pdev->dev, "pci_request_region FAILED\n");
	71	goto out_disable_device;
	72	}
1da177e4	73
8f31bb39	74	brd = kzalloc(sizeof(struct jsm_board), GFP_KERNEL);
1da177e4	75	if (!brd) {
614a7d6a CH	76	dev_err(&pdev->dev,
	77	"memory allocation for board structure failed\n");
	78	rc = -ENOMEM;
	79	goto out_release_regions;
1da177e4	80	}
1da177e4	81
1da177e4	82	/* store the info for the board we've found */
614a7d6a	83	brd->boardnum = adapter_count++;
1da177e4	84	brd->pci_dev = pdev;
99da9047 SK	85	if (pdev->device == PCIE_DEVICE_ID_NEO_4_IBM)
	86	brd->maxports = 4;
	87	else
	88	brd->maxports = 2;
1da177e4 LT	89
	90	spin_lock_init(&brd->bd_lock);
	91	spin_lock_init(&brd->bd_intr_lock);
	92
1da177e4	93	/* store which revision we have */
44c10138	94	brd->rev = pdev->revision;
1da177e4 LT	95
	96	brd->irq = pdev->irq;
	97
614a7d6a CH	98	jsm_printk(INIT, INFO, &brd->pci_dev,
614a7d6a CH	99	"jsm_found_board - NEO adapter\n");
1da177e4	100
614a7d6a CH	101	/* get the PCI Base Address Registers */
	102	brd->membase = pci_resource_start(pdev, 0);
	103	brd->membase_end = pci_resource_end(pdev, 0);
1da177e4	104
614a7d6a CH	105	if (brd->membase & 1)
	106	brd->membase &= ~3;
	107	else
	108	brd->membase &= ~15;
1da177e4	109
614a7d6a CH	110	/* Assign the board_ops struct */
614a7d6a CH	111	brd->bd_ops = &jsm_neo_ops;
1da177e4	112
614a7d6a CH	113	brd->bd_uart_offset = 0x200;
614a7d6a CH	114	brd->bd_dividend = 921600;
1da177e4	115
614a7d6a CH	116	brd->re_map_membase = ioremap(brd->membase, 0x1000);
	117	if (!brd->re_map_membase) {
	118	dev_err(&pdev->dev,
	119	"card has no PCI Memory resources, "
	120	"failing board.\n");
	121	rc = -ENOMEM;
	122	goto out_kfree_brd;
1da177e4 LT	123	}
1da177e4 LT	124
614a7d6a	125	rc = request_irq(brd->irq, brd->bd_ops->intr,
40663cc7	126	IRQF_DISABLED\|IRQF_SHARED, "JSM", brd);
614a7d6a CH	127	if (rc) {
	128	printk(KERN_WARNING "Failed to hook IRQ %d\n",brd->irq);
	129	goto out_iounmap;
1da177e4 LT	130	}
	131
	132	rc = jsm_tty_init(brd);
	133	if (rc < 0) {
	134	dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
1da177e4	135	retval = -ENXIO;
614a7d6a	136	goto out_free_irq;
1da177e4 LT	137	}
	138
	139	rc = jsm_uart_port_init(brd);
	140	if (rc < 0) {
614a7d6a	141	/* XXX: leaking all resources from jsm_tty_init here! */
1da177e4	142	dev_err(&pdev->dev, "Can't init uart port (%d)\n", rc);
1da177e4	143	retval = -ENXIO;
614a7d6a	144	goto out_free_irq;
1da177e4 LT	145	}
1da177e4 LT	146
1da177e4	147	/* Log the information about the board */
614a7d6a CH	148	dev_info(&pdev->dev, "board %d: Digi Neo (rev %d), irq %d\n",
614a7d6a CH	149	adapter_count, brd->rev, brd->irq);
1da177e4 LT	150
	151	/*
	152	* allocate flip buffer for board.
	153	*
	154	* Okay to malloc with GFP_KERNEL, we are not at interrupt
	155	* context, and there are no locks held.
	156	*/
8f31bb39	157	brd->flipbuf = kzalloc(MYFLIPLEN, GFP_KERNEL);
1da177e4	158	if (!brd->flipbuf) {
614a7d6a CH	159	/* XXX: leaking all resources from jsm_tty_init and
614a7d6a CH	160	jsm_uart_port_init here! */
1da177e4	161	dev_err(&pdev->dev, "memory allocation for flipbuf failed\n");
1da177e4	162	retval = -ENOMEM;
614a7d6a	163	goto out_free_irq;
1da177e4	164	}
1da177e4	165
614a7d6a	166	pci_set_drvdata(pdev, brd);
1da177e4	167
1da177e4	168	return 0;
614a7d6a	169	out_free_irq:
1da177e4	170	free_irq(brd->irq, brd);
614a7d6a	171	out_iounmap:
1da177e4	172	iounmap(brd->re_map_membase);
614a7d6a CH	173	out_kfree_brd:
	174	kfree(brd);
	175	out_release_regions:
	176	pci_release_regions(pdev);
	177	out_disable_device:
	178	pci_disable_device(pdev);
	179	out:
1da177e4 LT	180	return rc;
	181	}
	182
e9fed567	183	static void __devexit jsm_remove_one(struct pci_dev *pdev)
1da177e4	184	{
614a7d6a	185	struct jsm_board *brd = pci_get_drvdata(pdev);
1da177e4 LT	186	int i = 0;
1da177e4 LT	187
614a7d6a CH	188	jsm_remove_uart_port(brd);
614a7d6a CH	189
1da177e4 LT	190	free_irq(brd->irq, brd);
	191	iounmap(brd->re_map_membase);
	192
	193	/* Free all allocated channels structs */
	194	for (i = 0; i < brd->maxports; i++) {
	195	if (brd->channels[i]) {
614a7d6a CH	196	kfree(brd->channels[i]->ch_rqueue);
	197	kfree(brd->channels[i]->ch_equeue);
	198	kfree(brd->channels[i]->ch_wqueue);
1da177e4 LT	199	kfree(brd->channels[i]);
	200	}
	201	}
	202
614a7d6a CH	203	pci_release_regions(pdev);
614a7d6a CH	204	pci_disable_device(pdev);
1da177e4 LT	205	kfree(brd->flipbuf);
	206	kfree(brd);
	207	}
	208
614a7d6a CH	209	static struct pci_device_id jsm_pci_tbl[] = {
	210	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9), 0, 0, 0 },
	211	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2DB9PRI), 0, 0, 1 },
	212	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45), 0, 0, 2 },
	213	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCI_DEVICE_ID_NEO_2RJ45PRI), 0, 0, 3 },
99da9047	214	{ PCI_DEVICE(PCI_VENDOR_ID_DIGI, PCIE_DEVICE_ID_NEO_4_IBM), 0, 0, 4 },
614a7d6a CH	215	{ 0, }
	216	};
	217	MODULE_DEVICE_TABLE(pci, jsm_pci_tbl);
1da177e4	218
614a7d6a	219	static struct pci_driver jsm_driver = {
1da177e4	220	.name = "jsm",
1da177e4	221	.id_table = jsm_pci_tbl,
614a7d6a	222	.probe = jsm_probe_one,
1da177e4 LT	223	.remove = __devexit_p(jsm_remove_one),
	224	};
	225
1da177e4 LT	226	static int __init jsm_init_module(void)
1da177e4 LT	227	{
614a7d6a	228	int rc;
1da177e4 LT	229
1da177e4 LT	230	rc = uart_register_driver(&jsm_uart_driver);
614a7d6a CH	231	if (!rc) {
	232	rc = pci_register_driver(&jsm_driver);
	233	if (rc)
	234	uart_unregister_driver(&jsm_uart_driver);
1da177e4	235	}
1da177e4 LT	236	return rc;
	237	}
	238
1da177e4 LT	239	static void __exit jsm_exit_module(void)
1da177e4 LT	240	{
1da177e4	241	pci_unregister_driver(&jsm_driver);
1da177e4 LT	242	uart_unregister_driver(&jsm_uart_driver);
1da177e4 LT	243	}
614a7d6a CH	244
614a7d6a CH	245	module_init(jsm_init_module);
1da177e4	246	module_exit(jsm_exit_module);