X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=src%2Fps2port.c;h=26c55f28ee8ef6d3ae3221a9deb23680bbbee57d;hb=357bdfa26a681d614f04e842f85850fe5848f6fe;hp=01e8b3d607b45f4ef72f0eed21dac5da2c19386f;hpb=7e6dfd841e787499a4c84ccb134b2e3d621d7147;p=seabios.git

diff --git a/src/ps2port.c b/src/ps2port.c
index 01e8b3d..26c55f2 100644
--- a/src/ps2port.c
+++ b/src/ps2port.c
@@ -9,6 +9,7 @@
 #include "util.h" // dprintf
 #include "biosvar.h" // GET_EBDA
 #include "ps2port.h" // kbd_command
+#include "pic.h" // eoi_pic1
 
 
 /****************************************************************
@@ -31,7 +32,7 @@ i8042_wait_read(void)
             return 0;
         udelay(50);
     }
-    dprintf(1, "i8042 timeout on wait read\n");
+    warn_timeout();
     return -1;
 }
 
@@ -46,7 +47,7 @@ i8042_wait_write(void)
             return 0;
         udelay(50);
     }
-    dprintf(1, "i8042 timeout on wait write\n");
+    warn_timeout();
     return -1;
 }
 
@@ -54,22 +55,17 @@ int
 i8042_flush(void)
 {
     dprintf(7, "i8042_flush\n");
-    unsigned long flags = irq_save();
-
     int i;
     for (i=0; i<I8042_BUFFER_SIZE; i++) {
         u8 status = inb(PORT_PS2_STATUS);
-        if (! (status & I8042_STR_OBF)) {
-            irq_restore(flags);
+        if (! (status & I8042_STR_OBF))
             return 0;
-        }
         udelay(50);
         u8 data = inb(PORT_PS2_DATA);
         dprintf(7, "i8042 flushed %x (status=%x)\n", data, status);
     }
 
-    irq_restore(flags);
-    dprintf(1, "i8042 timeout on flush\n");
+    warn_timeout();
     return -1;
 }
 
@@ -110,9 +106,7 @@ int
 i8042_command(int command, u8 *param)
 {
     dprintf(7, "i8042_command cmd=%x\n", command);
-    unsigned long flags = irq_save();
     int ret = __i8042_command(command, param);
-    irq_restore(flags);
     if (ret)
         dprintf(2, "i8042 command %x failed\n", command);
     return ret;
@@ -122,14 +116,9 @@ static int
 i8042_kbd_write(u8 c)
 {
     dprintf(7, "i8042_kbd_write c=%d\n", c);
-    unsigned long flags = irq_save();
-
     int ret = i8042_wait_write();
     if (! ret)
         outb(c, PORT_PS2_DATA);
-
-    irq_restore(flags);
-
     return ret;
 }
 
@@ -147,35 +136,65 @@ i8042_aux_write(u8 c)
 #define PS2_RET_ACK             0xfa
 #define PS2_RET_NAK             0xfe
 
+static void
+process_ps2byte(u8 status, u8 data)
+{
+    if (!MODE16) {
+        // Don't pull in all of keyboard/mouse code into 32bit code -
+        // just discard the data.
+        dprintf(1, "Discarding ps2 data %x (status=%x)\n", data, status);
+        return;
+    }
+    if (status & I8042_STR_AUXDATA)
+        process_mouse(data);
+    else
+        process_key(data);
+}
+
+static void
+process_ps2bytes(void)
+{
+    for (;;) {
+        u8 status = inb(PORT_PS2_STATUS);
+        if (!(status & I8042_STR_OBF))
+            return;
+        u8 data = inb(PORT_PS2_DATA);
+        process_ps2byte(status, data);
+    }
+}
+
 static int
 ps2_recvbyte(int aux, int needack, int timeout)
 {
     u64 end = calc_future_tsc(timeout);
     for (;;) {
-        if (rdtscll() > end) {
-            dprintf(1, "ps2_recvbyte timeout\n");
-            return -1;
-        }
-
         u8 status = inb(PORT_PS2_STATUS);
-        if (! (status & I8042_STR_OBF))
-            continue;
-        u8 data = inb(PORT_PS2_DATA);
-        dprintf(7, "ps2 read %x\n", data);
-
-        if (!!(status & I8042_STR_AUXDATA) == aux) {
-            if (!needack)
-                return data;
-            if (data == PS2_RET_ACK)
-                return data;
-            if (data == PS2_RET_NAK) {
-                dprintf(1, "Got ps2 nak (status=%x); continuing\n", status);
-                return data;
+        if (status & I8042_STR_OBF) {
+            u8 data = inb(PORT_PS2_DATA);
+            dprintf(7, "ps2 read %x\n", data);
+
+            if (!!(status & I8042_STR_AUXDATA) == aux) {
+                if (!needack)
+                    return data;
+                if (data == PS2_RET_ACK)
+                    return data;
+                if (data == PS2_RET_NAK) {
+                    dprintf(1, "Got ps2 nak (status=%x)\n", status);
+                    return data;
+                }
             }
+
+            // Data not part of this command.
+            process_ps2byte(status, data);
         }
 
-        // This data not for us - XXX - just discard it for now.
-        dprintf(1, "Discarding ps2 data %x (status=%x)\n", data, status);
+        if (check_time(end)) {
+            // Don't warn on second byte of a reset
+            if (timeout > 100)
+                warn_timeout();
+            return -1;
+        }
+        yield();
     }
 }
 
@@ -195,6 +214,8 @@ ps2_sendbyte(int aux, u8 command, int timeout)
     ret = ps2_recvbyte(aux, 1, timeout);
     if (ret < 0)
         return ret;
+    if (ret != PS2_RET_ACK)
+        return -1;
 
     return 0;
 }
@@ -202,22 +223,13 @@ ps2_sendbyte(int aux, u8 command, int timeout)
 static int
 ps2_command(int aux, int command, u8 *param)
 {
-    int ret2;
+    int ret;
     int receive = (command >> 8) & 0xf;
     int send = (command >> 12) & 0xf;
 
-    // Disable interrupts and keyboard/mouse.
-    u8 ps2ctr = GET_EBDA(ps2ctr);
-    u8 newctr = ps2ctr;
-    if (aux)
-        newctr |= I8042_CTR_KBDDIS;
-    else
-        newctr |= I8042_CTR_AUXDIS;
-    newctr &= ~(I8042_CTR_KBDINT|I8042_CTR_AUXINT);
-    dprintf(6, "i8042 ctr old=%x new=%x\n", ps2ctr, newctr);
-    int ret = i8042_command(I8042_CMD_CTL_WCTR, &newctr);
-    if (ret)
-        return ret;
+    // Disable processing of interrupts.
+    u8 kbdflag = GET_BDA(kbd_flag3);
+    SET_BDA(kbd_flag3, kbdflag | KF3_CMD_PENDING);
 
     if (command == ATKBD_CMD_RESET_BAT) {
         // Reset is special wrt timeouts.
@@ -263,10 +275,10 @@ ps2_command(int aux, int command, u8 *param)
     ret = 0;
 
 fail:
-    // Restore interrupts and keyboard/mouse.
-    ret2 = i8042_command(I8042_CMD_CTL_WCTR, &ps2ctr);
-    if (ret2)
-        return ret2;
+    // Restore processing of interrupts.
+    if (!(kbdflag & KF3_CMD_PENDING))
+        process_ps2bytes();
+    SET_BDA(kbd_flag3, kbdflag);
 
     return ret;
 }
@@ -290,3 +302,134 @@ aux_command(int command, u8 *param)
         dprintf(2, "mouse command %x failed\n", command);
     return ret;
 }
+
+
+/****************************************************************
+ * IRQ handlers
+ ****************************************************************/
+
+static void
+process_ps2irq(void)
+{
+    if (GET_BDA(kbd_flag3) & KF3_CMD_PENDING)
+        // PS/2 command in progress - it will handle this event.
+        return;
+    process_ps2bytes();
+}
+
+// INT74h : PS/2 mouse hardware interrupt
+void VISIBLE16
+handle_74(void)
+{
+    if (! CONFIG_PS2PORT)
+        return;
+
+    debug_isr(DEBUG_ISR_74);
+    process_ps2irq();
+    eoi_pic2();
+}
+
+// INT09h : Keyboard Hardware Service Entry Point
+void VISIBLE16
+handle_09(void)
+{
+    if (! CONFIG_PS2PORT)
+        return;
+
+    debug_isr(DEBUG_ISR_09);
+    process_ps2irq();
+    eoi_pic1();
+}
+
+
+/****************************************************************
+ * Setup
+ ****************************************************************/
+
+static void
+keyboard_init(void *data)
+{
+    /* flush incoming keys */
+    int ret = i8042_flush();
+    if (ret)
+        return;
+
+    // Controller self-test.
+    u8 param[2];
+    ret = i8042_command(I8042_CMD_CTL_TEST, param);
+    if (ret)
+        return;
+    if (param[0] != 0x55) {
+        dprintf(1, "i8042 self test failed (got %x not 0x55)\n", param[0]);
+        return;
+    }
+
+    // Controller keyboard test.
+    ret = i8042_command(I8042_CMD_KBD_TEST, param);
+    if (ret)
+        return;
+    if (param[0] != 0x00) {
+        dprintf(1, "i8042 keyboard test failed (got %x not 0x00)\n", param[0]);
+        return;
+    }
+
+    // Enable keyboard and mouse ports.
+    ret = i8042_command(I8042_CMD_KBD_ENABLE, NULL);
+    if (ret)
+        return;
+    ret = i8042_command(I8042_CMD_AUX_ENABLE, NULL);
+    if (ret)
+        return;
+
+
+    /* ------------------- keyboard side ------------------------*/
+    /* reset keyboard and self test  (keyboard side) */
+    ret = kbd_command(ATKBD_CMD_RESET_BAT, param);
+    if (ret)
+        return;
+    if (param[0] != 0xaa) {
+        dprintf(1, "keyboard self test failed (got %x not 0xaa)\n", param[0]);
+        return;
+    }
+
+    /* Disable keyboard */
+    ret = kbd_command(ATKBD_CMD_RESET_DIS, NULL);
+    if (ret)
+        return;
+
+    // Set scancode command (mode 2)
+    param[0] = 0x02;
+    ret = kbd_command(ATKBD_CMD_SSCANSET, param);
+    if (ret)
+        return;
+
+    // Mode: scan code convert, enable IRQ 1, enable IRQ 12
+    param[0] = I8042_CTR_XLATE | I8042_CTR_KBDINT | I8042_CTR_AUXINT;
+    ret = i8042_command(I8042_CMD_CTL_WCTR, param);
+    if (ret)
+        return;
+    CLEARBITS_BDA(kbd_flag3, KF3_CMD_PENDING);
+
+    /* Enable keyboard */
+    ret = kbd_command(ATKBD_CMD_ENABLE, NULL);
+    if (ret)
+        return;
+
+    dprintf(1, "PS2 keyboard initialized\n");
+}
+
+void
+ps2port_setup(void)
+{
+    ASSERT32FLAT();
+    if (! CONFIG_PS2PORT)
+        return;
+    dprintf(3, "init ps2port\n");
+
+    // Setup irqs, but disable them until init complete.
+    SETBITS_BDA(kbd_flag3, KF3_CMD_PENDING);
+    enable_hwirq(1, entry_09);
+    enable_hwirq(12, entry_74);
+
+    run_thread(keyboard_init, NULL);
+}