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Message-Id: <1198893469.4861.9.camel@localhost>
Date: Fri, 28 Dec 2007 17:57:49 -0800
From: Joe Perches <joe@...ches.com>
To: Simon Holm Thøgersen <odie@...aau.dk>
Cc: Adrian McMenamin <adrian@...golddream.dyndns.info>,
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 Fri, 2007-12-28 at 01:18 +0100, Simon Holm Thøgersen wrote:
> > - while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) && (time_before(jiffies, timeout)))
> > + while (gdrom_is_busy() && (time_before(jiffies, timeout)))
> You don't need those parentheses.
> > + while (((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) != 8) &&
> > + (time_before(jiffies, timeout)))
> What about a nice telling function like gdrom_is_busy for this?
Perhaps (uncompiled/untested):
Remove unnecessary parenthesis
Remove GDROM: prefix from sense_texts
Add function gdrom_data_request
Check sense_key against sense_text array size
Signed-off-by: Joe Perches <joe@...ches.com>
---
drivers/cdrom/gdrom.c | 53 ++++++++++++++++++++++++++----------------------
1 files changed, 29 insertions(+), 24 deletions(-)
diff --git a/drivers/cdrom/gdrom.c b/drivers/cdrom/gdrom.c
index 59d26e0..ab95438 100644
--- a/drivers/cdrom/gdrom.c
+++ b/drivers/cdrom/gdrom.c
@@ -80,16 +80,15 @@ static const struct {
int sense_key;
const char * const text;
} sense_texts[] = {
- {NO_SENSE, "GDROM: OK"},
- {RECOVERED_ERROR, "GDROM: Recovered from error"},
- {NOT_READY, "GDROM: Device not ready"},
- {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"},
- {DATA_PROTECT, "GDROM: Data protection error"},
- {ABORTED_COMMAND, "GDROM: Command aborted"},
+ {NO_SENSE, "OK"},
+ {RECOVERED_ERROR, "Recovered from error"},
+ {NOT_READY, "Device not ready"},
+ {MEDIUM_ERROR, "Disk not ready"},
+ {HARDWARE_ERROR, "Hardware error"},
+ {ILLEGAL_REQUEST, "Command has failed"},
+ {UNIT_ATTENTION, "Device needs attention - disk may have been changed"},
+ {DATA_PROTECT, "Data protection error"},
+ {ABORTED_COMMAND, "Command aborted"},
};
static struct platform_device *pd;
@@ -140,11 +139,16 @@ static bool gdrom_is_busy(void)
return (ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) != 0;
}
+static bool gdrom_data_request(void)
+{
+ return (ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) == 8;
+}
+
static void gdrom_wait_clrbusy(void)
{
/* long timeouts - typical for a CD Rom */
unsigned long timeout = jiffies + HZ * 60;
- while (gdrom_is_busy() && (time_before(jiffies, timeout)))
+ while (gdrom_is_busy() && time_before(jiffies, timeout))
cpu_relax();
}
@@ -153,7 +157,7 @@ static void gdrom_wait_busy_sleeps(void)
unsigned long timeout;
/* Wait to get busy first */
timeout = jiffies + HZ * 60;
- while (!gdrom_is_busy() && (time_before(jiffies, timeout)))
+ while (!gdrom_is_busy() && time_before(jiffies, timeout))
cpu_relax();
/* Now wait for busy to clear */
gdrom_wait_clrbusy();
@@ -186,8 +190,8 @@ static void gdrom_spicommand(void *spi_string, int buflen)
/* Wait until we can go */
gdrom_wait_clrbusy();
ctrl_outb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG);
- while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) != 8)
- cpu_relax(); /* wait for DRQ to be set to 1 */
+ while (!gdrom_data_request())
+ cpu_relax();
outsw(PHYSADDR(GDROM_DATA_REG), cmd, 6);
}
@@ -354,7 +358,7 @@ static int gdrom_drivestatus(struct cdrom_device_info *cd_info, int ignore)
static int gdrom_mediachanged(struct cdrom_device_info *cd_info, int ignore)
{
/* check the sense key */
- return ((ctrl_inb(GDROM_ERROR_REG) & 0xF0) == 0x60);
+ return (ctrl_inb(GDROM_ERROR_REG) & 0xF0) == 0x60;
}
/* reset the G1 bus */
@@ -412,11 +416,13 @@ static int gdrom_getsense(short *bufstring)
return -EIO;
}
sense_key = sense[1] & 0x0F;
- printk(KERN_INFO "%s\n", sense_texts[sense_key].text);
+ if (sense_key < ARRAY_SIZE(sense_texts))
+ printk(KERN_INFO "GDROM: %s\n", sense_texts[sense_key].text);
+ else
+ printk(KERN_ERR "GDROM: Unknown sense key: %d\n", sense_key);
- if (bufstring)
+ if (bufstring) /* return additional sense data */
memcpy(bufstring, &sense[4], 2);
- /* return additional sense data */
if (sense_key < 2)
return 0;
@@ -550,19 +556,18 @@ static void gdrom_readdisk_dma(struct work_struct *work)
ctrl_outb(0, GDROM_INTSEC_REG);
/* In multiple DMA transfers need to wait */
timeout = jiffies + HZ / 2;
- while (gdrom_is_busy() && (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)))
- cpu_relax(); /* wait for DRQ to be set to 1 */
+ while (!gdrom_data_request() && time_before(jiffies, timeout))
+ cpu_relax();
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 */
--
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