From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joe Perches Date: Sat, 29 Dec 2007 01:57:49 +0000 Subject: Re: [PATCH] SH/Dreamcast - add support for GD-Rom device Message-Id: <1198893469.4861.9.camel@localhost> List-Id: References: <1198774339.6170.11.camel@localhost.localdomain> <1198796281.4833.31.camel@localhost> <1198801142.5354.67.camel@odie> In-Reply-To: <1198801142.5354.67.camel@odie> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Simon Holm =?ISO-8859-1?Q?Th=F8gersen?= Cc: Adrian McMenamin , Paul Mundt , Jens Axboe , LKML , linux-sh On Fri, 2007-12-28 at 01:18 +0100, Simon Holm Th=C3=B8gersen 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) !=3D 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 --- 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[] =3D { - {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"}, }; =20 static struct platform_device *pd; @@ -140,11 +139,16 @@ static bool gdrom_is_busy(void) return (ctrl_inb(GDROM_ALTSTATUS_REG) & 0x80) !=3D 0; } =20 +static bool gdrom_data_request(void) +{ + return (ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) =3D 8; +} + static void gdrom_wait_clrbusy(void) { /* long timeouts - typical for a CD Rom */ unsigned long timeout =3D jiffies + HZ * 60; - while (gdrom_is_busy() && (time_before(jiffies, timeout))) + while (gdrom_is_busy() && time_before(jiffies, timeout)) cpu_relax(); } =20 @@ -153,7 +157,7 @@ static void gdrom_wait_busy_sleeps(void) unsigned long timeout; /* Wait to get busy first */ timeout =3D 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 bufl= en) /* Wait until we can go */ gdrom_wait_clrbusy(); ctrl_outb(GDROM_COM_PACKET, GDROM_STATUSCOMMAND_REG); - while ((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) !=3D 8) - cpu_relax(); /* wait for DRQ to be set to 1 */ + while (!gdrom_data_request()) + cpu_relax(); outsw(PHYSADDR(GDROM_DATA_REG), cmd, 6); } =20 @@ -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 ignor= e) { /* check the sense key */ - return ((ctrl_inb(GDROM_ERROR_REG) & 0xF0) =3D 0x60); + return (ctrl_inb(GDROM_ERROR_REG) & 0xF0) =3D 0x60; } =20 /* reset the G1 bus */ @@ -412,11 +416,13 @@ static int gdrom_getsense(short *bufstring) return -EIO; } sense_key =3D 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); =20 - if (bufstring) + if (bufstring) /* return additional sense data */ memcpy(bufstring, &sense[4], 2); - /* return additional sense data */ =20 if (sense_key < 2) return 0; @@ -550,19 +556,18 @@ static void gdrom_readdisk_dma(struct work_struct *wo= rk) ctrl_outb(0, GDROM_INTSEC_REG); /* In multiple DMA transfers need to wait */ timeout =3D 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 =3D jiffies + HZ / 2; - while (((ctrl_inb(GDROM_ALTSTATUS_REG) & 0x88) !=3D 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 =3D 1; gd.transfer =3D 1; outsw(PHYSADDR(GDROM_DATA_REG), &read_command->cmd, 6); timeout =3D 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 */