diff options
Diffstat (limited to 'sys/dev/atkbdc/atkbdc.c')
| -rw-r--r-- | sys/dev/atkbdc/atkbdc.c | 76 |
1 files changed, 62 insertions, 14 deletions
diff --git a/sys/dev/atkbdc/atkbdc.c b/sys/dev/atkbdc/atkbdc.c index df1f28e..f8e856a 100644 --- a/sys/dev/atkbdc/atkbdc.c +++ b/sys/dev/atkbdc/atkbdc.c @@ -44,6 +44,10 @@ __FBSDID("$FreeBSD$"); #include <machine/resource.h> #include <sys/rman.h> +#if defined(__amd64__) +#include <machine/clock.h> +#endif + #include <dev/atkbdc/atkbdcreg.h> #ifdef __sparc64__ @@ -153,7 +157,7 @@ atkbdc_configure(void) bus_space_tag_t tag; bus_space_handle_t h0; bus_space_handle_t h1; -#if defined(__i386__) +#if defined(__i386__) || defined(__amd64__) volatile int i; register_t flags; #endif @@ -222,7 +226,7 @@ atkbdc_configure(void) #endif #endif -#if defined(__i386__) +#if defined(__i386__) || defined(__amd64__) /* * Check if we really have AT keyboard controller. Poll status * register until we get "all clear" indication. If no such @@ -248,6 +252,11 @@ static int atkbdc_setup(atkbdc_softc_t *sc, bus_space_tag_t tag, bus_space_handle_t h0, bus_space_handle_t h1) { +#if defined(__amd64__) + u_int64_t tscval[3], read_delay; + register_t flags; +#endif + if (sc->ioh0 == 0) { /* XXX */ sc->command_byte = -1; sc->command_mask = 0; @@ -264,6 +273,33 @@ atkbdc_setup(atkbdc_softc_t *sc, bus_space_tag_t tag, bus_space_handle_t h0, sc->iot = tag; sc->ioh0 = h0; sc->ioh1 = h1; + +#if defined(__amd64__) + /* + * On certain chipsets AT keyboard controller isn't present and is + * emulated by BIOS using SMI interrupt. On those chipsets reading + * from the status port may be thousand times slower than usually. + * Sometimes this emilation is not working properly resulting in + * commands timing our and since we assume that inb() operation + * takes very little time to complete we need to adjust number of + * retries to keep waiting time within a designed limits (100ms). + * Measure time it takes to make read_status() call and adjust + * number of retries accordingly. + */ + flags = intr_disable(); + tscval[0] = rdtsc(); + read_status(sc); + tscval[1] = rdtsc(); + DELAY(1000); + tscval[2] = rdtsc(); + intr_restore(flags); + read_delay = tscval[1] - tscval[0]; + read_delay /= (tscval[2] - tscval[1]) / 1000; + sc->retry = 100000 / ((KBDD_DELAYTIME * 2) + read_delay); +#else + sc->retry = 5000; +#endif + return 0; } @@ -380,10 +416,12 @@ removeq(kqueue *q) static int wait_while_controller_busy(struct atkbdc_softc *kbdc) { - /* CPU will stay inside the loop for 100msec at most */ - int retry = 5000; + int retry; int f; + /* CPU will stay inside the loop for 100msec at most */ + retry = kbdc->retry; + while ((f = read_status(kbdc)) & KBDS_INPUT_BUFFER_FULL) { if ((f & KBDS_BUFFER_FULL) == KBDS_KBD_BUFFER_FULL) { DELAY(KBDD_DELAYTIME); @@ -406,10 +444,12 @@ wait_while_controller_busy(struct atkbdc_softc *kbdc) static int wait_for_data(struct atkbdc_softc *kbdc) { - /* CPU will stay inside the loop for 200msec at most */ - int retry = 10000; + int retry; int f; + /* CPU will stay inside the loop for 200msec at most */ + retry = kbdc->retry * 2; + while ((f = read_status(kbdc) & KBDS_ANY_BUFFER_FULL) == 0) { DELAY(KBDC_DELAYTIME); if (--retry < 0) @@ -423,10 +463,12 @@ wait_for_data(struct atkbdc_softc *kbdc) static int wait_for_kbd_data(struct atkbdc_softc *kbdc) { - /* CPU will stay inside the loop for 200msec at most */ - int retry = 10000; + int retry; int f; + /* CPU will stay inside the loop for 200msec at most */ + retry = kbdc->retry * 2; + while ((f = read_status(kbdc) & KBDS_BUFFER_FULL) != KBDS_KBD_BUFFER_FULL) { if (f == KBDS_AUX_BUFFER_FULL) { @@ -448,11 +490,13 @@ wait_for_kbd_data(struct atkbdc_softc *kbdc) static int wait_for_kbd_ack(struct atkbdc_softc *kbdc) { - /* CPU will stay inside the loop for 200msec at most */ - int retry = 10000; + int retry; int f; int b; + /* CPU will stay inside the loop for 200msec at most */ + retry = kbdc->retry * 2; + while (retry-- > 0) { if ((f = read_status(kbdc)) & KBDS_ANY_BUFFER_FULL) { DELAY(KBDD_DELAYTIME); @@ -475,10 +519,12 @@ wait_for_kbd_ack(struct atkbdc_softc *kbdc) static int wait_for_aux_data(struct atkbdc_softc *kbdc) { - /* CPU will stay inside the loop for 200msec at most */ - int retry = 10000; + int retry; int f; + /* CPU will stay inside the loop for 200msec at most */ + retry = kbdc->retry * 2; + while ((f = read_status(kbdc) & KBDS_BUFFER_FULL) != KBDS_AUX_BUFFER_FULL) { if (f == KBDS_KBD_BUFFER_FULL) { @@ -500,11 +546,13 @@ wait_for_aux_data(struct atkbdc_softc *kbdc) static int wait_for_aux_ack(struct atkbdc_softc *kbdc) { - /* CPU will stay inside the loop for 200msec at most */ - int retry = 10000; + int retry; int f; int b; + /* CPU will stay inside the loop for 200msec at most */ + retry = kbdc->retry * 2; + while (retry-- > 0) { if ((f = read_status(kbdc)) & KBDS_ANY_BUFFER_FULL) { DELAY(KBDD_DELAYTIME); |
