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path: root/drivers/ata/pata_pdc2027x.c
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Diffstat (limited to 'drivers/ata/pata_pdc2027x.c')
-rw-r--r--drivers/ata/pata_pdc2027x.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/ata/pata_pdc2027x.c b/drivers/ata/pata_pdc2027x.c
index 69a5aa4949f..e3245b36269 100644
--- a/drivers/ata/pata_pdc2027x.c
+++ b/drivers/ata/pata_pdc2027x.c
@@ -563,13 +563,13 @@ static long pdc_read_counter(struct ata_host *host)
u32 bccrl, bccrh, bccrlv, bccrhv;
retry:
- bccrl = readl(mmio_base + PDC_BYTE_COUNT) & 0xffff;
- bccrh = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0xffff;
+ bccrl = readl(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
+ bccrh = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
rmb();
/* Read the counter values again for verification */
- bccrlv = readl(mmio_base + PDC_BYTE_COUNT) & 0xffff;
- bccrhv = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0xffff;
+ bccrlv = readl(mmio_base + PDC_BYTE_COUNT) & 0x7fff;
+ bccrhv = readl(mmio_base + PDC_BYTE_COUNT + 0x100) & 0x7fff;
rmb();
counter = (bccrh << 15) | bccrl;
@@ -692,16 +692,16 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
struct timeval start_time, end_time;
long pll_clock, usec_elapsed;
- /* Read current counter value */
- start_count = pdc_read_counter(host);
- do_gettimeofday(&start_time);
-
/* Start the test mode */
scr = readl(mmio_base + PDC_SYS_CTL);
PDPRINTK("scr[%X]\n", scr);
writel(scr | (0x01 << 14), mmio_base + PDC_SYS_CTL);
readl(mmio_base + PDC_SYS_CTL); /* flush */
+ /* Read current counter value */
+ start_count = pdc_read_counter(host);
+ do_gettimeofday(&start_time);
+
/* Let the counter run for 100 ms. */
mdelay(100);
@@ -719,7 +719,7 @@ static long pdc_detect_pll_input_clock(struct ata_host *host)
usec_elapsed = (end_time.tv_sec - start_time.tv_sec) * 1000000 +
(end_time.tv_usec - start_time.tv_usec);
- pll_clock = (start_count - end_count) / 100 *
+ pll_clock = ((start_count - end_count) & 0x3fffffff) / 100 *
(100000000 / usec_elapsed);
PDPRINTK("start[%ld] end[%ld] \n", start_count, end_count);