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made access to keyboard controller and dev->flags thread save 

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@16157 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Marcus Overhagen 2006-01-30 20:14:51 +00:00
parent db63fe6713
commit 84f007fba9
3 changed files with 23 additions and 18 deletions
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18
src/add-ons/kernel/bus_managers/ps2/ps2_common.c
View File

@ -19,10 +19,10 @@
isa_module_info *gIsa = NULL;
static sem_id sKbcSem;
static int32 sIgnoreInterrupts = 0;
bool gMultiplexingActive = false;
bool gMultiplexingActive = false;
sem_id gControllerSem;
inline uint8
@ -90,7 +90,7 @@ ps2_flush()
{
int i;
acquire_sem(sKbcSem);
acquire_sem(gControllerSem);
atomic_add(&sIgnoreInterrupts, 1);
for (i = 0; i < 64; i++) {
@ -105,7 +105,7 @@ ps2_flush()
}
atomic_add(&sIgnoreInterrupts, -1);
release_sem(sKbcSem);
release_sem(gControllerSem);
}
@ -115,7 +115,7 @@ ps2_command(uint8 cmd, const uint8 *out, int out_count, uint8 *in, int in_count)
status_t res;
int i;
acquire_sem(sKbcSem);
acquire_sem(gControllerSem);
atomic_add(&sIgnoreInterrupts, 1);
res = ps2_wait_write();
@ -135,7 +135,7 @@ ps2_command(uint8 cmd, const uint8 *out, int out_count, uint8 *in, int in_count)
}
atomic_add(&sIgnoreInterrupts, -1);
release_sem(sKbcSem);
release_sem(gControllerSem);
return res;
}
@ -216,7 +216,7 @@ ps2_init(void)
if (status < B_OK)
goto err_1;
sKbcSem = create_sem(1, "ps/2 keyb ctrl");
gControllerSem = create_sem(1, "ps/2 keyb ctrl");
status = ps2_dev_init();
@ -313,7 +313,7 @@ err_4:
err_3:
ps2_service_exit();
ps2_dev_exit();
delete_sem(sKbcSem);
delete_sem(gControllerSem);
err_2:
put_module(B_ISA_MODULE_NAME);
err_1:
@ -330,6 +330,6 @@ ps2_uninit(void)
remove_io_interrupt_handler(INT_PS2_KEYBOARD, &ps2_interrupt, NULL);
ps2_service_exit();
ps2_dev_exit();
delete_sem(sKbcSem);
delete_sem(gControllerSem);
put_module(B_ISA_MODULE_NAME);
}

1
src/add-ons/kernel/bus_managers/ps2/ps2_common.h
View File

@ -37,6 +37,7 @@ extern device_hooks gKeyboardDeviceHooks;
extern device_hooks gMouseDeviceHooks;
extern bool gMultiplexingActive;
extern sem_id gControllerSem;
// prototypes from common.c

20
src/add-ons/kernel/bus_managers/ps2/ps2_dev.c
View File

@ -66,7 +66,7 @@ ps2_dev_publish(ps2_dev *dev)
dev->active = true;
status = devfs_publish_device(dev->name, NULL,
(dev->flags & PS2_FLAG_KEYB) ? &gKeyboardDeviceHooks : &gMouseDeviceHooks);
(atomic_get(&dev->flags) & PS2_FLAG_KEYB) ? &gKeyboardDeviceHooks : &gMouseDeviceHooks);
TRACE(("devfs_publish_device %s, status = 0x%08x\n", dev->name, status));
}
@ -165,7 +165,7 @@ ps2_dev_command(ps2_dev *dev, uint8 cmd, const uint8 *out, int out_count, uint8
release_sem_etc(dev->result_sem, -sem_count, 0);
}
dev->flags |= PS2_FLAG_CMD;
atomic_or(&dev->flags, PS2_FLAG_CMD);
dev->result_buf_cnt = in_count;
dev->result_buf_idx = 0;
@ -174,11 +174,13 @@ ps2_dev_command(ps2_dev *dev, uint8 cmd, const uint8 *out, int out_count, uint8
res = B_OK;
for (i = -1; res == B_OK && i < out_count; i++) {
dev->flags &= ~(PS2_FLAG_ACK | PS2_FLAG_NACK | PS2_FLAG_GETID);
atomic_and(&dev->flags, ~(PS2_FLAG_ACK | PS2_FLAG_NACK | PS2_FLAG_GETID));
if (i == -1 && cmd == PS2_CMD_GET_DEVICE_ID)
dev->flags |= PS2_FLAG_GETID;
atomic_or(&dev->flags, PS2_FLAG_GETID);
if (!(dev->flags & PS2_FLAG_KEYB)) {
acquire_sem(gControllerSem);
if (!(atomic_get(&dev->flags) & PS2_FLAG_KEYB)) {
uint8 prefix_cmd;
if (gMultiplexingActive)
prefix_cmd = 0x90 + dev->idx;
@ -194,6 +196,8 @@ ps2_dev_command(ps2_dev *dev, uint8 cmd, const uint8 *out, int out_count, uint8
ps2_write_data(i == -1 ? cmd : out[i]);
}
release_sem(gControllerSem);
start = system_time();
res = acquire_sem_etc(dev->result_sem, 1, B_RELATIVE_TIMEOUT, 4000000);
dprintf("ps2_dev_command wait for ack res %08x, wait-time %Ld\n", res, system_time() - start);
@ -201,11 +205,11 @@ ps2_dev_command(ps2_dev *dev, uint8 cmd, const uint8 *out, int out_count, uint8
if (res != B_OK)
break;
if (dev->flags & PS2_FLAG_ACK) {
if (atomic_get(&dev->flags) & PS2_FLAG_ACK) {
dprintf("ps2_dev_command got ACK\n");
}
if (dev->flags & PS2_FLAG_NACK) {
if (atomic_get(&dev->flags) & PS2_FLAG_NACK) {
dprintf("ps2_dev_command got NACK\n");
res = B_ERROR;
break;
@ -228,7 +232,7 @@ ps2_dev_command(ps2_dev *dev, uint8 cmd, const uint8 *out, int out_count, uint8
dprintf("ps2_dev_command data %02x\n", in[i]);
}
dev->flags &= ~PS2_FLAG_CMD;
atomic_and(&dev->flags, ~PS2_FLAG_CMD);
return res;
}