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SubjectRe: [ patch 1/5] drivers/serial/jsm: new serial device driver
Greg KH wrote:

>On Wed, Mar 09, 2005 at 12:18:21PM -0500, Wen Xiong wrote:
>
>
>>Greg KH wrote:
>>
>>
>>
>>>On Wed, Mar 09, 2005 at 10:47:22AM -0500, Wen Xiong wrote:
>>>
>>>
>>>
>>>
>>>>+static ssize_t jsm_driver_debug_show(struct device_driver *ddp, char
>>>>*buf)
>>>>+{
>>>>+ return snprintf(buf, PAGE_SIZE, "0x%x\n", jsm_debug);
>>>>+}
>>>>+static DRIVER_ATTR(debug, S_IRUSR, jsm_driver_debug_show, NULL);
>>>>
>>>>
>>>>
>>>>
>>>Should just be a module paramater, right? So you can drop this too...
>>>
>>>This file is getting quite small now :)
>>>
>>>
>>>
>>If I removed two module paramaters, only two files left: version and state.
>>Removed all of them?
>>
>>
>
>Move them to a different file?
>
>
Hi All,

Based on the second round comments and discussion, I cleared up the
header files, merged /sysfs to another file and removed new ioctls.
I am going to send out whole patches again(totally 5 patches at the time).

Thanks for all your help!

>
>
diff -Nuar linux-2.6.11.org/drivers/serial/jsm/jsm_driver.c linux-2.6.11.new/drivers/serial/jsm/jsm_driver.c
--- linux-2.6.11.org/drivers/serial/jsm/jsm_driver.c 1969-12-31 18:00:00.000000000 -0600
+++ linux-2.6.11.new/drivers/serial/jsm/jsm_driver.c 2005-03-10 16:34:00.107901984 -0600
@@ -0,0 +1,406 @@
+/************************************************************************
+ * 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, 1);
+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;
+
+ brd = (struct jsm_board *)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;
+ brd->dpastatus = BD_NOFEP;
+ goto failed;
+ }
+
+ rc = jsm_tty_init(brd);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "Can't init tty devices (%d)\n", rc);
+ brd->state = BOARD_FAILED;
+ brd->dpastatus = BD_NOFEP;
+ free_irq(brd->irq, brd);
+ goto failed;
+ }
+
+ rc = jsm_uart_port_init(brd);
+ if (rc < 0) {
+ free_irq(brd->irq, brd);
+ goto failed;
+ }
+
+ 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");
+ free_irq(brd->irq, brd);
+ kfree(brd);
+ iounmap((void *) brd->re_map_membase);
+ return -ENOMEM;
+ }
+ memset(brd->flipbuf, 0, MYFLIPLEN);
+
+ jsm_create_driver_sysfiles(pdev->dev.driver);
+
+ wake_up_interruptible(&brd->state_wait);
+ return 0;
+
+failed:
+ kfree(brd);
+ iounmap((void *) brd->re_map_membase);
+ return -ENXIO;
+}
+
+/* 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]);
+ brd->channels[i] = NULL;
+ }
+ }
+
+ 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");
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