diff options
| author | Matthew Wilcox <matthew@wil.cx> | 2005-12-15 16:22:01 -0500 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.(none)> | 2005-12-15 18:42:39 -0800 |
| commit | ef72582e7a02e1069c6e6bf5eecf6f388b1467c6 (patch) | |
| tree | af53892d987f11d8bc0cec3674daf2f564290e93 /drivers/scsi/scsi_transport_spi.c | |
| parent | b32aaffcdc694650d299a59501c5b3e267fca343 (diff) | |
| download | olio-linux-3.10-ef72582e7a02e1069c6e6bf5eecf6f388b1467c6.tar.xz olio-linux-3.10-ef72582e7a02e1069c6e6bf5eecf6f388b1467c6.zip | |
[SCSI] Add PPR support to spi_print_msg
Introduce a new helper, print_nego() to handle SDTR/WDTR/PPR.
Split out the guts of show_spi_transport_period_helper() into period_to_str()
and use it in print_nego to get the period factor conversion right.
Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/scsi_transport_spi.c')
| -rw-r--r-- | drivers/scsi/scsi_transport_spi.c | 36 |
1 files changed, 29 insertions, 7 deletions
diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c index 380e1671eb1..46da6fe10ad 100644 --- a/drivers/scsi/scsi_transport_spi.c +++ b/drivers/scsi/scsi_transport_spi.c @@ -379,9 +379,7 @@ static CLASS_DEVICE_ATTR(revalidate, S_IWUSR, NULL, store_spi_revalidate); /* Translate the period into ns according to the current spec * for SDTR/PPR messages */ -static ssize_t -show_spi_transport_period_helper(struct class_device *cdev, char *buf, - int period) +static int period_to_str(char *buf, int period) { int len, picosec; @@ -399,6 +397,14 @@ show_spi_transport_period_helper(struct class_device *cdev, char *buf, len = sprint_frac(buf, picosec, 1000); } + return len; +} + +static ssize_t +show_spi_transport_period_helper(struct class_device *cdev, char *buf, + int period) +{ + int len = period_to_str(buf, period); buf[len++] = '\n'; buf[len] = '\0'; return len; @@ -1065,9 +1071,23 @@ static const char * const two_byte_msgs[] = { static const char * const extended_msgs[] = { /* 0x00 */ "Modify Data Pointer", "Synchronous Data Transfer Request", -/* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request" +/* 0x02 */ "SCSI-I Extended Identify", "Wide Data Transfer Request", +/* 0x04 */ "Parallel Protocol Request" }; +void print_nego(const unsigned char *msg, int per, int off, int width) +{ + if (per) { + char buf[20]; + period_to_str(buf, msg[per]); + printk("period = %s ns ", buf); + } + + if (off) + printk("offset = %d ", msg[off]); + if (width) + printk("width = %d ", 8 << msg[width]); +} int spi_print_msg(const unsigned char *msg) { @@ -1085,11 +1105,13 @@ int spi_print_msg(const unsigned char *msg) (msg[4] << 16) | (msg[5] << 8) | msg[6]); break; case EXTENDED_SDTR: - printk("period = %d ns, offset = %d", - (int) msg[3] * 4, (int) msg[4]); + print_nego(msg, 3, 4, 0); break; case EXTENDED_WDTR: - printk("width = 2^%d bytes", msg[3]); + print_nego(msg, 0, 0, 3); + break; + case EXTENDED_PPR: + print_nego(msg, 3, 5, 6); break; default: for (i = 2; i < len; ++i) |