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sim: gpio: add output support 

Make all of the pins bidirectional, and support sending signals when
software drives the pins as outputs.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2011-04-26 05:47:14 +00:00
parent 5e0ba1a39e
commit 054c055baf
2 changed files with 53 additions and 16 deletions
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8
sim/bfin/ChangeLog
View File

@ -1,3 +1,11 @@
2011-04-26 Mike Frysinger <vapier@gentoo.org>
* dv-bfin_gpio.c (bfin_gpio_forward_ouput): New function.
(bfin_gpio_io_write_buffer): Store the current port state into
"data", and call bfin_gpio_forward_ouput when the data or dir
MMRs are updated.
(bfin_gpio_ports): Change p0..p15 to bidirect_port.
2011-04-26 Mike Frysinger <vapier@gentoo.org>
* dv-bfin_gpio.c (bfin_gpio): Add "int_state" member.

61
sim/bfin/dv-bfin_gpio.c
View File

@ -76,6 +76,30 @@ bfin_gpio_forward_ints (struct hw *me, struct bfin_gpio *port)
bfin_gpio_forward_int (me, port, port->maskb, 1);
}
static void
bfin_gpio_forward_ouput (struct hw *me, struct bfin_gpio *port, bu32 odata)
{
int pin, value, ovalue, bit;
for (pin = 0; pin < 16; ++pin)
{
bit = 1 << pin;
/* Make sure this is an output pin. */
if (!(port->dir & bit))
continue;
/* Only signal port if the pin changes value. */
value = !!(port->data & bit);
ovalue = !!(odata & bit);
if (value == ovalue)
continue;
HW_TRACE ((me, "outputting gpio %i changed to %i", pin, value));
hw_port_event (me, pin, value);
}
}
static unsigned
bfin_gpio_io_write_buffer (struct hw *me, const void *source, int space,
address_word addr, unsigned nr_bytes)
@ -84,6 +108,7 @@ bfin_gpio_io_write_buffer (struct hw *me, const void *source, int space,
bu32 mmr_off;
bu16 value;
bu16 *valuep;
bu32 data = port->data;
value = dv_load_2 (source);
mmr_off = addr - port->base;
@ -134,6 +159,10 @@ bfin_gpio_io_write_buffer (struct hw *me, const void *source, int space,
/* If updating masks, make sure we send updated port info. */
switch (mmr_off)
{
case mmr_offset(dir):
case mmr_offset(data) ... mmr_offset(toggle):
bfin_gpio_forward_ouput (me, port, data);
break;
case mmr_offset(maska) ... mmr_offset(maska_toggle):
bfin_gpio_forward_int (me, port, port->maska, 0);
break;
@ -199,22 +228,22 @@ static const struct hw_port_descriptor bfin_gpio_ports[] =
{
{ "mask_a", 0, 0, output_port, },
{ "mask_b", 1, 0, output_port, },
{ "p0", 0, 0, input_port, },
{ "p1", 1, 0, input_port, },
{ "p2", 2, 0, input_port, },
{ "p3", 3, 0, input_port, },
{ "p4", 4, 0, input_port, },
{ "p5", 5, 0, input_port, },
{ "p6", 6, 0, input_port, },
{ "p7", 7, 0, input_port, },
{ "p8", 8, 0, input_port, },
{ "p9", 9, 0, input_port, },
{ "p10", 10, 0, input_port, },
{ "p11", 11, 0, input_port, },
{ "p12", 12, 0, input_port, },
{ "p13", 13, 0, input_port, },
{ "p14", 14, 0, input_port, },
{ "p15", 15, 0, input_port, },
{ "p0", 0, 0, bidirect_port, },
{ "p1", 1, 0, bidirect_port, },
{ "p2", 2, 0, bidirect_port, },
{ "p3", 3, 0, bidirect_port, },
{ "p4", 4, 0, bidirect_port, },
{ "p5", 5, 0, bidirect_port, },
{ "p6", 6, 0, bidirect_port, },
{ "p7", 7, 0, bidirect_port, },
{ "p8", 8, 0, bidirect_port, },
{ "p9", 9, 0, bidirect_port, },
{ "p10", 10, 0, bidirect_port, },
{ "p11", 11, 0, bidirect_port, },
{ "p12", 12, 0, bidirect_port, },
{ "p13", 13, 0, bidirect_port, },
{ "p14", 14, 0, bidirect_port, },
{ "p15", 15, 0, bidirect_port, },
{ NULL, 0, 0, 0, },
};