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Date: Thu, 27 Dec 2007 14:58:01 -0800
From: Joe Perches <joe@...ches.com>
To: Adrian McMenamin <adrian@...golddream.dyndns.info>
Cc: Paul Mundt <lethal@...ux-sh.org>,
Jens Axboe <jens.axboe@...cle.com>,
LKML <linux-kernel@...r.kernel.org>,
linux-sh <linux-sh@...r.kernel.org>
Subject: Re: [PATCH] SH/Dreamcast - add support for GD-Rom device
On Thu, 2007-12-27 at 16:52 +0000, Adrian McMenamin wrote:
> This patch adds support for the CD-Rom drive on the SEGA Dreamcast.
Because it was already so close, might as well make it checkpatch clean.
I also added a function gdrom_is_busy() to make a couple of tests
fit on a single line and perhaps easier to read.
Signed-off-by: Joe Perches <joe@...ches.com>
--- a/drivers/cdrom/gdrom.c 2007-12-27 14:49:27.000000000 -0800
+++ b/drivers/cdrom/gdrom.c 2007-12-27 14:46:20.000000000 -0800
@@ -86,7 +86,8 @@
{MEDIUM_ERROR, "GDROM: Disk not ready"},
{HARDWARE_ERROR, "GDROM: Hardware error"},
{ILLEGAL_REQUEST, "GDROM: Command has failed"},
- {UNIT_ATTENTION, "GDROM: Device needs attention - disk may have been changed"},
+ {UNIT_ATTENTION, "GDROM: Device needs attention - "
+ "disk may have been changed"},
{DATA_PROTECT, "GDROM: Data protection error"},
{ABORTED_COMMAND, "GDROM: Command aborted"},
};
@@ -130,14 +131,20 @@
};
static int gdrom_getsense(short *bufstring);
-static int gdrom_packetcommand(struct cdrom_device_info *cd_info, struct packet_command *command);
+static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
+ struct packet_command *command);
static int gdrom_hardreset(struct cdrom_device_info *cd_info);
+static bool gdrom_is_busy(void)
+{
+ return (ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) != 0;
+}
+
static void gdrom_wait_clrbusy(void)
{
/* long timeouts - typical for a CD Rom */
unsigned long timeout = jiffies + HZ * 60;
- while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) && (time_before(jiffies, timeout)))
+ while (gdrom_is_busy() && (time_before(jiffies, timeout)))
cpu_relax();
}
@@ -146,7 +153,7 @@
unsigned long timeout;
/* Wait to get busy first */
timeout = jiffies + HZ * 60;
- while (((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) == 0) && (time_before(jiffies, timeout)))
+ while (!gdrom_is_busy() && (time_before(jiffies, timeout)))
cpu_relax();
/* Now wait for busy to clear */
gdrom_wait_clrbusy();
@@ -216,7 +223,8 @@
gd.pending = 1;
gdrom_packetcommand(gd.cd_info, spin_command);
/* 60 second timeout */
- wait_event_interruptible_timeout(command_queue, gd.pending == 0, HZ * 60);
+ wait_event_interruptible_timeout(command_queue,
+ gd.pending == 0, HZ * 60);
gd.pending = 0;
kfree(spin_command);
if (gd.status & 0x01) {
@@ -249,7 +257,8 @@
toc_command->buflen = tocsize;
gd.pending = 1;
gdrom_packetcommand(gd.cd_info, toc_command);
- wait_event_interruptible_timeout(command_queue, gd.pending == 0, HZ * 60);
+ wait_event_interruptible_timeout(command_queue,
+ gd.pending == 0, HZ * 60);
gd.pending = 0;
insw(PHYSADDR(GDROM_DATA_REG), toc, tocsize/2);
kfree(toc_command);
@@ -274,7 +283,8 @@
return (track & 0x0000ff00) >> 8;
}
-static int gdrom_get_last_session(struct cdrom_device_info *cd_info, struct cdrom_multisession *ms_info)
+static int gdrom_get_last_session(struct cdrom_device_info *cd_info,
+ struct cdrom_multisession *ms_info)
{
int fentry, lentry, track, data, tocuse, err;
if (!gd.toc)
@@ -287,7 +297,8 @@
tocuse = 0;
err = gdrom_readtoc_cmd(gd.toc, 0);
if (err) {
- printk(KERN_INFO "GDROM: Could not get CD table of contents\n");
+ printk(KERN_INFO "GDROM: Could not get CD "
+ "table of contents\n");
return -ENXIO;
}
}
@@ -305,7 +316,8 @@
if ((track > 100) || (track < get_entry_track(gd.toc->first))) {
gdrom_getsense(NULL);
- printk(KERN_INFO "GDROM: No data on the last session of the CD\n");
+ printk(KERN_INFO "GDROM: No data on the last session "
+ "of the CD\n");
return -ENXIO;
}
@@ -355,8 +367,10 @@
return 0;
}
-/* keep the function looking like the universal CD Rom specification - returning int*/
-static int gdrom_packetcommand(struct cdrom_device_info *cd_info, struct packet_command *command)
+/* keep the function looking like the universal CD Rom specification -
+ * returning int */
+static int gdrom_packetcommand(struct cdrom_device_info *cd_info,
+ struct packet_command *command)
{
gdrom_spicommand(&command->cmd, command->buflen);
return 0;
@@ -388,7 +402,8 @@
gd.pending = 1;
gdrom_packetcommand(gd.cd_info, sense_command);
/* 60 second timeout */
- wait_event_interruptible_timeout(command_queue, gd.pending == 0, HZ * 60);
+ wait_event_interruptible_timeout(command_queue,
+ gd.pending == 0, HZ * 60);
gd.pending = 0;
kfree(sense_command);
insw(PHYSADDR(GDROM_DATA_REG), &sense, 5);
@@ -400,7 +415,8 @@
printk(KERN_INFO "%s\n", sense_texts[sense_key].text);
if (bufstring)
- memcpy(bufstring, &sense[4], 2); /* return additional sense data */
+ memcpy(bufstring, &sense[4], 2);
+ /* return additional sense data */
if (sense_key < 2)
return 0;
@@ -434,7 +450,8 @@
return cdrom_media_changed(gd.cd_info);
}
-static int gdrom_bdops_ioctl(struct inode *inode, struct file *file, unsigned cmd, unsigned long arg)
+static int gdrom_bdops_ioctl(struct inode *inode, struct file *file,
+ unsigned cmd, unsigned long arg)
{
return cdrom_ioctl(file, gd.cd_info, inode, cmd, arg);
}
@@ -471,11 +488,13 @@
{
int err;
init_waitqueue_head(&command_queue);
- err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt, IRQF_DISABLED, "gdrom_command", &gd);
+ err = request_irq(HW_EVENT_GDROM_CMD, gdrom_command_interrupt,
+ IRQF_DISABLED, "gdrom_command", &gd);
if (err)
return err;
init_waitqueue_head(&request_queue);
- err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt, IRQF_DISABLED, "gdrom_dma", &gd);
+ err = request_irq(HW_EVENT_GDROM_DMA, gdrom_dma_interrupt,
+ IRQF_DISABLED, "gdrom_dma", &gd);
if (err)
free_irq(HW_EVENT_GDROM_CMD, &gd);
return err;
@@ -531,27 +550,30 @@
ctrl_outb(0, GDROM_INTSEC_REG);
/* In multiple DMA transfers need to wait */
timeout = jiffies + HZ / 2;
- while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) && (time_before(jiffies, timeout)))
+ while (gdrom_is_busy() && (time_before(jiffies, timeout)))
cpu_relax();
ctrl_outb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
timeout = jiffies + HZ / 2;
- while (((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) != 8) && (time_before(jiffies, timeout)))
+ while (((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) != 8) &&
+ (time_before(jiffies, timeout)))
cpu_relax(); /* wait for DRQ to be set to 1 */
gd.pending = 1;
gd.transfer = 1;
outsw(PHYSADDR(GDROM_DATA_REG), &read_command->cmd, 6);
timeout = jiffies + HZ / 2;
- while ((ctrl_inb(GDROM_DMA_STATUS_REG)) && (time_before(jiffies, timeout)))
+ while ((ctrl_inb(GDROM_DMA_STATUS_REG)) &&
+ (time_before(jiffies, timeout)))
cpu_relax();
ctrl_outb(1, GDROM_DMA_STATUS_REG);
/* 5 second error margin here seems more reasonable */
- wait_event_interruptible_timeout(request_queue, gd.transfer == 0, HZ * 5);
+ wait_event_interruptible_timeout(request_queue,
+ gd.transfer == 0, HZ * 5);
err = ctrl_inb(GDROM_DMA_STATUS_REG);
err = gd.transfer;
gd.transfer = 0;
gd.pending = 0;
/* now seek to take the request spinlock
- * before handling ending the request */
+ * before handling ending the request */
spin_lock(&gdrom_lock);
list_del_init(&req->queuelist);
blk_requeue_request(gd.gdrom_rq, req);
@@ -567,7 +589,7 @@
static void gdrom_request_handler_dma(struct request *req)
{
/* dequeue, add to list of deferred work
- * and then schedule workqueue */
+ * and then schedule workqueue */
blkdev_dequeue_request(req);
list_add_tail(&req->queuelist, &gdrom_deferred);
schedule_work(&work);
@@ -582,7 +604,8 @@
end_request(req, 0);
}
if (rq_data_dir(req) != READ) {
- printk(KERN_NOTICE "GDROM: Read only device - write request ignored\n");
+ printk(KERN_NOTICE "GDROM: Read only device - "
+ "write request ignored\n");
end_request(req, 0);
}
if (req->nr_sectors)
@@ -612,7 +635,8 @@
firmw_ver = kstrndup(id->firmver, 16, GFP_KERNEL);
if (!firmw_ver)
goto free_manuf_name;
- printk(KERN_INFO "GDROM: %s from %s with firmware %s\n", model_name, manuf_name, firmw_ver);
+ printk(KERN_INFO "GDROM: %s from %s with firmware %s\n",
+ model_name, manuf_name, firmw_ver);
err = 0;
kfree(firmw_ver);
free_manuf_name:
@@ -641,7 +665,8 @@
gd.cd_info->ops = &gdrom_ops;
gd.cd_info->capacity = 1;
strcpy(gd.cd_info->name, GDROM_DEV_NAME);
- gd.cd_info->mask = CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|CDC_SELECT_DISC;
+ gd.cd_info->mask = CDC_CLOSE_TRAY | CDC_OPEN_TRAY |
+ CDC_LOCK | CDC_SELECT_DISC;
}
static void __devinit probe_gdrom_setupdisk(void)
@@ -671,7 +696,7 @@
{
int err;
if (gdrom_execute_diagnostic() != 1) {
- printk(KERN_WARNING "GDROM: ATA Probe for GDROM failed.\n");
+ printk(KERN_WARNING "GDROM: ATA Probe for GDROM failed\n");
return -ENODEV;
}
if (gdrom_outputversion())
@@ -679,7 +704,8 @@
gdrom_major = register_blkdev(0, GDROM_DEV_NAME);
if (gdrom_major <= 0)
return gdrom_major;
- printk(KERN_INFO "GDROM: Block device is registered with major number %d\n", gdrom_major);
+ printk(KERN_INFO "GDROM: Block device is registered "
+ "with major number %d\n", gdrom_major);
gd.cd_info = kzalloc(sizeof(struct cdrom_device_info), GFP_KERNEL);
if (!gd.cd_info) {
err = -ENOMEM;
@@ -724,7 +750,8 @@
unregister_blkdev(gdrom_major, GDROM_DEV_NAME);
gdrom_major = 0;
probe_fail_no_mem:
- printk(KERN_WARNING "GDROM: Could not probe for device - error is 0x%X\n", err);
+ printk(KERN_WARNING "GDROM: Could not probe for device - "
+ "error is 0x%X\n", err);
return err;
}
--
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