X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=src%2Fps2port.c;h=1f042999047ed818e7a5b458c0c03716b9b4cc0d;hb=e216ce8fb5470a375756574d65723cbf764a2919;hp=3f2fee7796a79840911caa520d0f2e56fe324328;hpb=b1b7c2a1c3b940b787fdb5da67fc37003e9d7b0e;p=seabios.git

diff --git a/src/ps2port.c b/src/ps2port.c
index 3f2fee7..1f04299 100644
--- a/src/ps2port.c
+++ b/src/ps2port.c
@@ -7,8 +7,10 @@
 
 #include "ioport.h" // inb
 #include "util.h" // dprintf
+#include "paravirt.h" // romfile_loadint
 #include "biosvar.h" // GET_EBDA
-#include "ps2port.h" // kbd_command
+#include "ps2port.h" // ps2_kbd_command
+#include "pic.h" // eoi_pic1
 
 
 /****************************************************************
@@ -31,7 +33,7 @@ i8042_wait_read(void)
             return 0;
         udelay(50);
     }
-    dprintf(1, "i8042 timeout on wait read\n");
+    warn_timeout();
     return -1;
 }
 
@@ -46,30 +48,25 @@ i8042_wait_write(void)
             return 0;
         udelay(50);
     }
-    dprintf(1, "i8042 timeout on wait write\n");
+    warn_timeout();
     return -1;
 }
 
-int
+static 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\n", 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;
 }
 
@@ -106,13 +103,11 @@ __i8042_command(int command, u8 *param)
     return 0;
 }
 
-int
+static 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 +117,9 @@ 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;
 }
 
@@ -139,6 +129,20 @@ i8042_aux_write(u8 c)
     return i8042_command(I8042_CMD_AUX_SEND, &c);
 }
 
+void
+i8042_reboot(void)
+{
+    if (! CONFIG_PS2PORT)
+       return;
+    int i;
+    for (i=0; i<10; i++) {
+        i8042_wait_write();
+        udelay(50);
+        outb(0xfe, PORT_PS2_STATUS); /* pulse reset low */
+        udelay(50);
+    }
+}
+
 
 /****************************************************************
  * Device commands.
@@ -152,30 +156,38 @@ 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)
-            || (needack && data != PS2_RET_ACK)) {
-            // This data not for us - XXX - just discard it for now.
-            dprintf(1, "Discarding ps2 data %x\n", data);
-            continue;
+        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;
+                }
+            }
+
+            // This data not part of command - just discard it.
+            dprintf(1, "Discarding ps2 data %02x (status=%02x)\n", data, status);
         }
 
-        return data;
+        if (check_tsc(end)) {
+            // Don't warn on second byte of a reset
+            if (timeout > 100)
+                warn_timeout();
+            return -1;
+        }
+        yield();
     }
 }
 
 static int
-ps2_sendbyte(int aux, u8 command)
+ps2_sendbyte(int aux, u8 command, int timeout)
 {
     dprintf(7, "ps2_sendbyte aux=%d cmd=%x\n", aux, command);
     int ret;
@@ -187,15 +199,17 @@ ps2_sendbyte(int aux, u8 command)
         return ret;
 
     // Read ack.
-    ret = ps2_recvbyte(aux, 1, 200);
+    ret = ps2_recvbyte(aux, 1, timeout);
     if (ret < 0)
         return ret;
+    if (ret != PS2_RET_ACK)
+        return -1;
 
     return 0;
 }
 
 static int
-ps2_command(int aux, int command, u8 *param)
+__ps2_command(int aux, int command, u8 *param)
 {
     int ret2;
     int receive = (command >> 8) & 0xf;
@@ -203,42 +217,91 @@ ps2_command(int aux, int command, u8 *param)
 
     // 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);
+    u8 newctr = ((ps2ctr | I8042_CTR_AUXDIS | I8042_CTR_KBDDIS)
+                 & ~(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;
 
-    // Send command.
-    ret = ps2_sendbyte(aux, command);
+    // Flush any interrupts already pending.
+    yield();
+
+    // Enable port command is being sent to.
+    if (aux)
+        newctr &= ~I8042_CTR_AUXDIS;
+    else
+        newctr &= ~I8042_CTR_KBDDIS;
+    ret = i8042_command(I8042_CMD_CTL_WCTR, &newctr);
     if (ret)
         goto fail;
 
-    // Send parameters (if any).
-    int i;
-    for (i = 0; i < send; i++) {
-        ret = ps2_sendbyte(aux, param[i]);
+    if (command == ATKBD_CMD_RESET_BAT) {
+        // Reset is special wrt timeouts and bytes received.
+
+        // Send command.
+        ret = ps2_sendbyte(aux, command, 1000);
         if (ret)
             goto fail;
-    }
 
-    // Receive parameters (if any).
-    for (i = 0; i < receive; i++) {
-        u8 data = ps2_recvbyte(aux, 0, 200);
-        if (data < 0) {
-            // On a receive timeout, return the item number that the
-            // transfer failed on.
-            ret = i + 1;
+        // Receive parameters.
+        ret = ps2_recvbyte(aux, 0, 4000);
+        if (ret < 0)
+            goto fail;
+        param[0] = ret;
+        ret = ps2_recvbyte(aux, 0, 100);
+        if (ret < 0)
+            // Some devices only respond with one byte on reset.
+            ret = 0;
+        param[1] = ret;
+    } else if (command == ATKBD_CMD_GETID) {
+        // Getid is special wrt bytes received.
+
+        // Send command.
+        ret = ps2_sendbyte(aux, command, 200);
+        if (ret)
+            goto fail;
+
+        // Receive parameters.
+        ret = ps2_recvbyte(aux, 0, 500);
+        if (ret < 0)
+            goto fail;
+        param[0] = ret;
+        if (ret == 0xab || ret == 0xac || ret == 0x2b || ret == 0x5d
+            || ret == 0x60 || ret == 0x47) {
+            // These ids (keyboards) return two bytes.
+            ret = ps2_recvbyte(aux, 0, 500);
+            if (ret < 0)
+                goto fail;
+            param[1] = ret;
+        } else {
+            param[1] = 0;
+        }
+    } else {
+        // Send command.
+        ret = ps2_sendbyte(aux, command, 200);
+        if (ret)
             goto fail;
+
+        // Send parameters (if any).
+        int i;
+        for (i = 0; i < send; i++) {
+            ret = ps2_sendbyte(aux, param[i], 200);
+            if (ret)
+                goto fail;
+        }
+
+        // Receive parameters (if any).
+        for (i = 0; i < receive; i++) {
+            ret = ps2_recvbyte(aux, 0, 500);
+            if (ret < 0)
+                goto fail;
+            param[i] = ret;
         }
-        param[i] = data;
     }
 
+    ret = 0;
+
 fail:
     // Restore interrupts and keyboard/mouse.
     ret2 = i8042_command(I8042_CMD_CTL_WCTR, &ps2ctr);
@@ -248,22 +311,191 @@ fail:
     return ret;
 }
 
-int
-kbd_command(int command, u8 *param)
+static int
+ps2_command(int aux, int command, u8 *param)
 {
-    dprintf(7, "kbd_command cmd=%x\n", command);
-    int ret = ps2_command(0, command, param);
+    dprintf(7, "ps2_command aux=%d cmd=%x\n", aux, command);
+    int ret = __ps2_command(aux, command, param);
     if (ret)
-        dprintf(2, "keyboard command %x failed (ret=%d)\n", command, ret);
+        dprintf(2, "ps2 command %x failed (aux=%d)\n", command, aux);
     return ret;
 }
 
 int
-aux_command(int command, u8 *param)
+ps2_kbd_command(int command, u8 *param)
+{
+    if (! CONFIG_PS2PORT)
+        return -1;
+    return ps2_command(0, command, param);
+}
+
+int
+ps2_mouse_command(int command, u8 *param)
+{
+    if (! CONFIG_PS2PORT)
+        return -1;
+
+    // Update ps2ctr for mouse enable/disable.
+    if (command == PSMOUSE_CMD_ENABLE || command == PSMOUSE_CMD_DISABLE) {
+        u16 ebda_seg = get_ebda_seg();
+        u8 ps2ctr = GET_EBDA2(ebda_seg, ps2ctr);
+        if (command == PSMOUSE_CMD_ENABLE)
+            ps2ctr = (ps2ctr | I8042_CTR_AUXINT) & ~I8042_CTR_AUXDIS;
+        else
+            ps2ctr = (ps2ctr | I8042_CTR_AUXDIS) & ~I8042_CTR_AUXINT;
+        SET_EBDA2(ebda_seg, ps2ctr, ps2ctr);
+    }
+
+    return ps2_command(1, command, param);
+}
+
+
+/****************************************************************
+ * IRQ handlers
+ ****************************************************************/
+
+// INT74h : PS/2 mouse hardware interrupt
+void VISIBLE16
+handle_74(void)
 {
-    dprintf(7, "aux_command cmd=%x\n", command);
-    int ret = ps2_command(1, command, param);
+    if (! CONFIG_PS2PORT)
+        return;
+
+    debug_isr(DEBUG_ISR_74);
+
+    u8 v = inb(PORT_PS2_STATUS);
+    if ((v & (I8042_STR_OBF|I8042_STR_AUXDATA))
+        != (I8042_STR_OBF|I8042_STR_AUXDATA)) {
+        dprintf(1, "ps2 mouse irq but no mouse data.\n");
+        goto done;
+    }
+    v = inb(PORT_PS2_DATA);
+
+    if (!(GET_EBDA(ps2ctr) & I8042_CTR_AUXINT))
+        // Interrupts not enabled.
+        goto done;
+
+    process_mouse(v);
+
+done:
+    eoi_pic2();
+}
+
+// INT09h : Keyboard Hardware Service Entry Point
+void VISIBLE16
+handle_09(void)
+{
+    if (! CONFIG_PS2PORT)
+        return;
+
+    debug_isr(DEBUG_ISR_09);
+
+    // read key from keyboard controller
+    u8 v = inb(PORT_PS2_STATUS);
+    if (v & I8042_STR_AUXDATA) {
+        dprintf(1, "ps2 keyboard irq but found mouse data?!\n");
+        goto done;
+    }
+    v = inb(PORT_PS2_DATA);
+
+    if (!(GET_EBDA(ps2ctr) & I8042_CTR_KBDINT))
+        // Interrupts not enabled.
+        goto done;
+
+    process_key(v);
+
+done:
+    eoi_pic1();
+}
+
+
+/****************************************************************
+ * Setup
+ ****************************************************************/
+
+static void
+keyboard_init(void *data)
+{
+    /* flush incoming keys */
+    int ret = i8042_flush();
     if (ret)
-        dprintf(2, "mouse command %x failed (ret=%d)\n", command, ret);
-    return 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;
+    }
+
+    // Disable keyboard and mouse events.
+    SET_EBDA(ps2ctr, I8042_CTR_KBDDIS | I8042_CTR_AUXDIS);
+
+
+    /* ------------------- keyboard side ------------------------*/
+    /* reset keyboard and self test  (keyboard side) */
+    int spinupdelay = romfile_loadint("etc/ps2-keyboard-spinup", 0);
+    u64 end = calc_future_tsc(spinupdelay);
+    for (;;) {
+        ret = ps2_kbd_command(ATKBD_CMD_RESET_BAT, param);
+        if (!ret)
+            break;
+        if (check_tsc(end)) {
+            if (spinupdelay)
+                warn_timeout();
+            return;
+        }
+        yield();
+    }
+    if (param[0] != 0xaa) {
+        dprintf(1, "keyboard self test failed (got %x not 0xaa)\n", param[0]);
+        return;
+    }
+
+    /* Disable keyboard */
+    ret = ps2_kbd_command(ATKBD_CMD_RESET_DIS, NULL);
+    if (ret)
+        return;
+
+    // Set scancode command (mode 2)
+    param[0] = 0x02;
+    ret = ps2_kbd_command(ATKBD_CMD_SSCANSET, param);
+    if (ret)
+        return;
+
+    // Keyboard Mode: disable mouse, scan code convert, enable kbd IRQ
+    SET_EBDA(ps2ctr, I8042_CTR_AUXDIS | I8042_CTR_XLATE | I8042_CTR_KBDINT);
+
+    /* Enable keyboard */
+    ret = ps2_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");
+
+    enable_hwirq(1, FUNC16(entry_09));
+    enable_hwirq(12, FUNC16(entry_74));
+
+    run_thread(keyboard_init, NULL);
 }