#include <linux/moduleparam.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
-#include <linux/config.h>
#include <linux/init.h>
#include <linux/serio.h>
#include <linux/err.h>
+#include <linux/rcupdate.h>
+#include <linux/platform_device.h>
#include <asm/io.h>
MODULE_DESCRIPTION("i8042 keyboard and mouse controller driver");
MODULE_LICENSE("GPL");
+static unsigned int i8042_nokbd;
+module_param_named(nokbd, i8042_nokbd, bool, 0);
+MODULE_PARM_DESC(nokbd, "Do not probe or use KBD port.");
+
static unsigned int i8042_noaux;
module_param_named(noaux, i8042_noaux, bool, 0);
MODULE_PARM_DESC(noaux, "Do not probe or use AUX (mouse) port.");
static unsigned int i8042_noloop;
module_param_named(noloop, i8042_noloop, bool, 0);
-MODULE_PARM_DESC(dumbkbd, "Disable the AUX Loopback command while probing for the AUX port");
+MODULE_PARM_DESC(noloop, "Disable the AUX Loopback command while probing for the AUX port");
+
+static unsigned int i8042_blink_frequency = 500;
+module_param_named(panicblink, i8042_blink_frequency, uint, 0600);
+MODULE_PARM_DESC(panicblink, "Frequency with which keyboard LEDs should blink when kernel panics");
-#ifdef CONFIG_ACPI
-static int i8042_noacpi;
-module_param_named(noacpi, i8042_noacpi, bool, 0);
-MODULE_PARM_DESC(noacpi, "Do not use ACPI to detect controller settings");
+#ifdef CONFIG_PNP
+static int i8042_nopnp;
+module_param_named(nopnp, i8042_nopnp, bool, 0);
+MODULE_PARM_DESC(nopnp, "Do not use PNP to detect controller settings");
#endif
#define DEBUG
#include "i8042.h"
-DEFINE_SPINLOCK(i8042_lock);
+static DEFINE_SPINLOCK(i8042_lock);
-struct i8042_values {
+struct i8042_port {
+ struct serio *serio;
int irq;
- unsigned char disable;
- unsigned char irqen;
unsigned char exists;
signed char mux;
- char name[8];
};
-static struct i8042_values i8042_kbd_values = {
- .disable = I8042_CTR_KBDDIS,
- .irqen = I8042_CTR_KBDINT,
- .mux = -1,
- .name = "KBD",
-};
+#define I8042_KBD_PORT_NO 0
+#define I8042_AUX_PORT_NO 1
+#define I8042_MUX_PORT_NO 2
+#define I8042_NUM_PORTS (I8042_NUM_MUX_PORTS + 2)
-static struct i8042_values i8042_aux_values = {
- .disable = I8042_CTR_AUXDIS,
- .irqen = I8042_CTR_AUXINT,
- .mux = -1,
- .name = "AUX",
-};
-
-static struct i8042_values i8042_mux_values[I8042_NUM_MUX_PORTS];
+static struct i8042_port i8042_ports[I8042_NUM_PORTS];
-static struct serio *i8042_kbd_port;
-static struct serio *i8042_aux_port;
-static struct serio *i8042_mux_port[I8042_NUM_MUX_PORTS];
static unsigned char i8042_initial_ctr;
static unsigned char i8042_ctr;
-static unsigned char i8042_mux_open;
static unsigned char i8042_mux_present;
-static struct timer_list i8042_timer;
+static unsigned char i8042_kbd_irq_registered;
+static unsigned char i8042_aux_irq_registered;
+static unsigned char i8042_suppress_kbd_ack;
static struct platform_device *i8042_platform_device;
-/*
- * Shared IRQ's require a device pointer, but this driver doesn't support
- * multiple devices
- */
-#define i8042_request_irq_cookie (&i8042_timer)
-
-static irqreturn_t i8042_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static irqreturn_t i8042_interrupt(int irq, void *dev_id);
/*
* The i8042_wait_read() and i8042_wait_write functions wait for the i8042 to
static int i8042_wait_read(void)
{
int i = 0;
+
while ((~i8042_read_status() & I8042_STR_OBF) && (i < I8042_CTL_TIMEOUT)) {
udelay(50);
i++;
static int i8042_wait_write(void)
{
int i = 0;
+
while ((i8042_read_status() & I8042_STR_IBF) && (i < I8042_CTL_TIMEOUT)) {
udelay(50);
i++;
static int i8042_flush(void)
{
unsigned long flags;
- unsigned char data;
+ unsigned char data, str;
int i = 0;
spin_lock_irqsave(&i8042_lock, flags);
- while ((i8042_read_status() & I8042_STR_OBF) && (i++ < I8042_BUFFER_SIZE)) {
+ while (((str = i8042_read_status()) & I8042_STR_OBF) && (i < I8042_BUFFER_SIZE)) {
udelay(50);
data = i8042_read_data();
+ i++;
dbg("%02x <- i8042 (flush, %s)", data,
- i8042_read_status() & I8042_STR_AUXDATA ? "aux" : "kbd");
+ str & I8042_STR_AUXDATA ? "aux" : "kbd");
}
spin_unlock_irqrestore(&i8042_lock, flags);
* encoded in bits 8-11 of the command number.
*/
-static int i8042_command(unsigned char *param, int command)
+static int __i8042_command(unsigned char *param, int command)
{
- unsigned long flags;
- int retval = 0, i = 0;
+ int i, error;
if (i8042_noloop && command == I8042_CMD_AUX_LOOP)
return -1;
- spin_lock_irqsave(&i8042_lock, flags);
+ error = i8042_wait_write();
+ if (error)
+ return error;
+
+ dbg("%02x -> i8042 (command)", command & 0xff);
+ i8042_write_command(command & 0xff);
- retval = i8042_wait_write();
- if (!retval) {
- dbg("%02x -> i8042 (command)", command & 0xff);
- i8042_write_command(command & 0xff);
+ for (i = 0; i < ((command >> 12) & 0xf); i++) {
+ error = i8042_wait_write();
+ if (error)
+ return error;
+ dbg("%02x -> i8042 (parameter)", param[i]);
+ i8042_write_data(param[i]);
}
- if (!retval)
- for (i = 0; i < ((command >> 12) & 0xf); i++) {
- if ((retval = i8042_wait_write())) break;
- dbg("%02x -> i8042 (parameter)", param[i]);
- i8042_write_data(param[i]);
+ for (i = 0; i < ((command >> 8) & 0xf); i++) {
+ error = i8042_wait_read();
+ if (error) {
+ dbg(" -- i8042 (timeout)");
+ return error;
}
- if (!retval)
- for (i = 0; i < ((command >> 8) & 0xf); i++) {
- if ((retval = i8042_wait_read())) break;
- if (i8042_read_status() & I8042_STR_AUXDATA)
- param[i] = ~i8042_read_data();
- else
- param[i] = i8042_read_data();
- dbg("%02x <- i8042 (return)", param[i]);
+ if (command == I8042_CMD_AUX_LOOP &&
+ !(i8042_read_status() & I8042_STR_AUXDATA)) {
+ dbg(" -- i8042 (auxerr)");
+ return -1;
}
- spin_unlock_irqrestore(&i8042_lock, flags);
+ param[i] = i8042_read_data();
+ dbg("%02x <- i8042 (return)", param[i]);
+ }
- if (retval)
- dbg(" -- i8042 (timeout)");
+ return 0;
+}
+
+static int i8042_command(unsigned char *param, int command)
+{
+ unsigned long flags;
+ int retval;
+
+ spin_lock_irqsave(&i8042_lock, flags);
+ retval = __i8042_command(param, command);
+ spin_unlock_irqrestore(&i8042_lock, flags);
return retval;
}
spin_lock_irqsave(&i8042_lock, flags);
- if(!(retval = i8042_wait_write())) {
+ if (!(retval = i8042_wait_write())) {
dbg("%02x -> i8042 (kbd-data)", c);
i8042_write_data(c);
}
* i8042_aux_write() sends a byte out through the aux interface.
*/
-static int i8042_aux_write(struct serio *port, unsigned char c)
+static int i8042_aux_write(struct serio *serio, unsigned char c)
{
- struct i8042_values *values = port->port_data;
- int retval;
-
-/*
- * Send the byte out.
- */
-
- if (values->mux == -1)
- retval = i8042_command(&c, I8042_CMD_AUX_SEND);
- else
- retval = i8042_command(&c, I8042_CMD_MUX_SEND + values->mux);
-
-/*
- * Make sure the interrupt happens and the character is received even
- * in the case the IRQ isn't wired, so that we can receive further
- * characters later.
- */
+ struct i8042_port *port = serio->port_data;
- i8042_interrupt(0, NULL, NULL);
- return retval;
+ return i8042_command(&c, port->mux == -1 ?
+ I8042_CMD_AUX_SEND :
+ I8042_CMD_MUX_SEND + port->mux);
}
/*
- * i8042_activate_port() enables port on a chip.
+ * i8042_start() is called by serio core when port is about to finish
+ * registering. It will mark port as existing so i8042_interrupt can
+ * start sending data through it.
*/
-
-static int i8042_activate_port(struct serio *port)
+static int i8042_start(struct serio *serio)
{
- struct i8042_values *values = port->port_data;
-
- i8042_flush();
-
- /*
- * Enable port again here because it is disabled if we are
- * resuming (normally it is enabled already).
- */
- i8042_ctr &= ~values->disable;
-
- i8042_ctr |= values->irqen;
-
- if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
- i8042_ctr &= ~values->irqen;
- return -1;
- }
+ struct i8042_port *port = serio->port_data;
+ port->exists = 1;
+ mb();
return 0;
}
-
/*
- * i8042_open() is called when a port is open by the higher layer.
- * It allocates the interrupt and calls i8042_enable_port.
+ * i8042_stop() marks serio port as non-existing so i8042_interrupt
+ * will not try to send data to the port that is about to go away.
+ * The function is called by serio core as part of unregister procedure.
*/
-
-static int i8042_open(struct serio *port)
+static void i8042_stop(struct serio *serio)
{
- struct i8042_values *values = port->port_data;
-
- if (values->mux != -1)
- if (i8042_mux_open++)
- return 0;
-
- if (request_irq(values->irq, i8042_interrupt,
- SA_SHIRQ, "i8042", i8042_request_irq_cookie)) {
- printk(KERN_ERR "i8042.c: Can't get irq %d for %s, unregistering the port.\n", values->irq, values->name);
- goto irq_fail;
- }
-
- if (i8042_activate_port(port)) {
- printk(KERN_ERR "i8042.c: Can't activate %s, unregistering the port\n", values->name);
- goto activate_fail;
- }
+ struct i8042_port *port = serio->port_data;
- i8042_interrupt(0, NULL, NULL);
-
- return 0;
-
-activate_fail:
- free_irq(values->irq, i8042_request_irq_cookie);
-
-irq_fail:
- values->exists = 0;
- serio_unregister_port_delayed(port);
-
- return -1;
-}
-
-/*
- * i8042_close() frees the interrupt, so that it can possibly be used
- * by another driver. We never know - if the user doesn't have a mouse,
- * the BIOS could have used the AUX interrupt for PCI.
- */
-
-static void i8042_close(struct serio *port)
-{
- struct i8042_values *values = port->port_data;
-
- if (values->mux != -1)
- if (--i8042_mux_open)
- return;
-
- i8042_ctr &= ~values->irqen;
-
- if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
- printk(KERN_ERR "i8042.c: Can't write CTR while closing %s.\n", values->name);
- return;
- }
-
- free_irq(values->irq, i8042_request_irq_cookie);
-
- i8042_flush();
+ port->exists = 0;
+ synchronize_sched();
+ port->serio = NULL;
}
/*
* to the upper layers.
*/
-static irqreturn_t i8042_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t i8042_interrupt(int irq, void *dev_id)
{
+ struct i8042_port *port;
unsigned long flags;
- unsigned char str, data = 0;
+ unsigned char str, data;
unsigned int dfl;
- unsigned int aux_idx;
- int ret;
-
- mod_timer(&i8042_timer, jiffies + I8042_POLL_PERIOD);
+ unsigned int port_no;
+ int ret = 1;
spin_lock_irqsave(&i8042_lock, flags);
str = i8042_read_status();
- if (str & I8042_STR_OBF)
- data = i8042_read_data();
- spin_unlock_irqrestore(&i8042_lock, flags);
-
- if (~str & I8042_STR_OBF) {
+ if (unlikely(~str & I8042_STR_OBF)) {
+ spin_unlock_irqrestore(&i8042_lock, flags);
if (irq) dbg("Interrupt %d, without any data", irq);
ret = 0;
goto out;
}
+ data = i8042_read_data();
+ spin_unlock_irqrestore(&i8042_lock, flags);
if (i8042_mux_present && (str & I8042_STR_AUXDATA)) {
static unsigned long last_transmit;
dfl = 0;
if (str & I8042_STR_MUXERR) {
dbg("MUX error, status is %02x, data is %02x", str, data);
- switch (data) {
- default:
/*
* When MUXERR condition is signalled the data register can only contain
* 0xfd, 0xfe or 0xff if implementation follows the spec. Unfortunately
- * it is not always the case. Some KBC just get confused which port the
- * data came from and signal error leaving the data intact. They _do not_
- * revert to legacy mode (actually I've never seen KBC reverting to legacy
- * mode yet, when we see one we'll add proper handling).
- * Anyway, we will assume that the data came from the same serio last byte
+ * it is not always the case. Some KBCs also report 0xfc when there is
+ * nothing connected to the port while others sometimes get confused which
+ * port the data came from and signal error leaving the data intact. They
+ * _do not_ revert to legacy mode (actually I've never seen KBC reverting
+ * to legacy mode yet, when we see one we'll add proper handling).
+ * Anyway, we process 0xfc, 0xfd, 0xfe and 0xff as timeouts, and for the
+ * rest assume that the data came from the same serio last byte
* was transmitted (if transmission happened not too long ago).
*/
+
+ switch (data) {
+ default:
if (time_before(jiffies, last_transmit + HZ/10)) {
str = last_str;
break;
}
/* fall through - report timeout */
+ case 0xfc:
case 0xfd:
case 0xfe: dfl = SERIO_TIMEOUT; data = 0xfe; break;
case 0xff: dfl = SERIO_PARITY; data = 0xfe; break;
}
}
- aux_idx = (str >> 6) & 3;
-
- dbg("%02x <- i8042 (interrupt, aux%d, %d%s%s)",
- data, aux_idx, irq,
- dfl & SERIO_PARITY ? ", bad parity" : "",
- dfl & SERIO_TIMEOUT ? ", timeout" : "");
-
- if (likely(i8042_mux_values[aux_idx].exists))
- serio_interrupt(i8042_mux_port[aux_idx], data, dfl, regs);
-
+ port_no = I8042_MUX_PORT_NO + ((str >> 6) & 3);
last_str = str;
last_transmit = jiffies;
- goto irq_ret;
+ } else {
+
+ dfl = ((str & I8042_STR_PARITY) ? SERIO_PARITY : 0) |
+ ((str & I8042_STR_TIMEOUT) ? SERIO_TIMEOUT : 0);
+
+ port_no = (str & I8042_STR_AUXDATA) ?
+ I8042_AUX_PORT_NO : I8042_KBD_PORT_NO;
}
- dfl = ((str & I8042_STR_PARITY) ? SERIO_PARITY : 0) |
- ((str & I8042_STR_TIMEOUT) ? SERIO_TIMEOUT : 0);
+ port = &i8042_ports[port_no];
- dbg("%02x <- i8042 (interrupt, %s, %d%s%s)",
- data, (str & I8042_STR_AUXDATA) ? "aux" : "kbd", irq,
- dfl & SERIO_PARITY ? ", bad parity" : "",
- dfl & SERIO_TIMEOUT ? ", timeout" : "");
+ dbg("%02x <- i8042 (interrupt, %d, %d%s%s)",
+ data, port_no, irq,
+ dfl & SERIO_PARITY ? ", bad parity" : "",
+ dfl & SERIO_TIMEOUT ? ", timeout" : "");
+ if (unlikely(i8042_suppress_kbd_ack))
+ if (port_no == I8042_KBD_PORT_NO &&
+ (data == 0xfa || data == 0xfe)) {
+ i8042_suppress_kbd_ack--;
+ goto out;
+ }
- if (str & I8042_STR_AUXDATA) {
- if (likely(i8042_aux_values.exists))
- serio_interrupt(i8042_aux_port, data, dfl, regs);
- } else {
- if (likely(i8042_kbd_values.exists))
- serio_interrupt(i8042_kbd_port, data, dfl, regs);
- }
+ if (likely(port->exists))
+ serio_interrupt(port->serio, data, dfl);
-irq_ret:
- ret = 1;
-out:
+ out:
return IRQ_RETVAL(ret);
}
/*
- * i8042_set_mux_mode checks whether the controller has an active
- * multiplexor and puts the chip into Multiplexed (1) or Legacy (0) mode.
+ * i8042_enable_kbd_port enables keybaord port on chip
*/
-static int i8042_set_mux_mode(unsigned int mode, unsigned char *mux_version)
+static int i8042_enable_kbd_port(void)
{
+ i8042_ctr &= ~I8042_CTR_KBDDIS;
+ i8042_ctr |= I8042_CTR_KBDINT;
- unsigned char param;
-/*
- * Get rid of bytes in the queue.
- */
+ if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
+ printk(KERN_ERR "i8042.c: Failed to enable KBD port.\n");
+ return -EIO;
+ }
- i8042_flush();
+ return 0;
+}
/*
- * Internal loopback test - send three bytes, they should come back from the
- * mouse interface, the last should be version. Note that we negate mouseport
- * command responses for the i8042_check_aux() routine.
+ * i8042_enable_aux_port enables AUX (mouse) port on chip
*/
- param = 0xf0;
- if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != 0x0f)
- return -1;
- param = mode ? 0x56 : 0xf6;
- if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != (mode ? 0xa9 : 0x09))
- return -1;
- param = mode ? 0xa4 : 0xa5;
- if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param == (mode ? 0x5b : 0x5a))
- return -1;
+static int i8042_enable_aux_port(void)
+{
+ i8042_ctr &= ~I8042_CTR_AUXDIS;
+ i8042_ctr |= I8042_CTR_AUXINT;
- if (mux_version)
- *mux_version = ~param;
+ if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
+ printk(KERN_ERR "i8042.c: Failed to enable AUX port.\n");
+ return -EIO;
+ }
return 0;
}
-
/*
* i8042_enable_mux_ports enables 4 individual AUX ports after
* the controller has been switched into Multiplexed mode
*/
-static int i8042_enable_mux_ports(struct i8042_values *values)
+static int i8042_enable_mux_ports(void)
{
unsigned char param;
int i;
+
+ for (i = 0; i < I8042_NUM_MUX_PORTS; i++) {
+ i8042_command(¶m, I8042_CMD_MUX_PFX + i);
+ i8042_command(¶m, I8042_CMD_AUX_ENABLE);
+ }
+
+ return i8042_enable_aux_port();
+}
+
/*
- * Disable all muxed ports by disabling AUX.
+ * i8042_set_mux_mode checks whether the controller has an active
+ * multiplexor and puts the chip into Multiplexed (1) or Legacy (0) mode.
*/
- i8042_ctr |= I8042_CTR_AUXDIS;
- i8042_ctr &= ~I8042_CTR_AUXINT;
+static int i8042_set_mux_mode(unsigned int mode, unsigned char *mux_version)
+{
- if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
- printk(KERN_ERR "i8042.c: Failed to disable AUX port, can't use MUX.\n");
- return -1;
- }
+ unsigned char param;
+/*
+ * Get rid of bytes in the queue.
+ */
+
+ i8042_flush();
/*
- * Enable all muxed ports.
+ * Internal loopback test - send three bytes, they should come back from the
+ * mouse interface, the last should be version.
*/
- for (i = 0; i < 4; i++) {
- i8042_command(¶m, I8042_CMD_MUX_PFX + i);
- i8042_command(¶m, I8042_CMD_AUX_ENABLE);
- }
+ param = 0xf0;
+ if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != 0xf0)
+ return -1;
+ param = mode ? 0x56 : 0xf6;
+ if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != (mode ? 0x56 : 0xf6))
+ return -1;
+ param = mode ? 0xa4 : 0xa5;
+ if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param == (mode ? 0xa4 : 0xa5))
+ return -1;
+
+ if (mux_version)
+ *mux_version = param;
return 0;
}
-
/*
* i8042_check_mux() checks whether the controller supports the PS/2 Active
* Multiplexing specification by Synaptics, Phoenix, Insyde and
* LCS/Telegraphics.
*/
-static int __init i8042_check_mux(struct i8042_values *values)
+static int __devinit i8042_check_mux(void)
{
unsigned char mux_version;
if (i8042_set_mux_mode(1, &mux_version))
return -1;
- /* Workaround for interference with USB Legacy emulation */
- /* that causes a v10.12 MUX to be found. */
+/*
+ * Workaround for interference with USB Legacy emulation
+ * that causes a v10.12 MUX to be found.
+ */
if (mux_version == 0xAC)
return -1;
printk(KERN_INFO "i8042.c: Detected active multiplexing controller, rev %d.%d.\n",
(mux_version >> 4) & 0xf, mux_version & 0xf);
- if (i8042_enable_mux_ports(values))
- return -1;
+/*
+ * Disable all muxed ports by disabling AUX.
+ */
+ i8042_ctr |= I8042_CTR_AUXDIS;
+ i8042_ctr &= ~I8042_CTR_AUXINT;
+
+ if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
+ printk(KERN_ERR "i8042.c: Failed to disable AUX port, can't use MUX.\n");
+ return -EIO;
+ }
i8042_mux_present = 1;
+
return 0;
}
-
/*
- * i8042_check_aux() applies as much paranoia as it can at detecting
- * the presence of an AUX interface.
+ * The following is used to test AUX IRQ delivery.
*/
+static struct completion i8042_aux_irq_delivered __devinitdata;
+static int i8042_irq_being_tested __devinitdata;
-static int __init i8042_check_aux(struct i8042_values *values)
+static irqreturn_t __devinit i8042_aux_test_irq(int irq, void *dev_id)
{
- unsigned char param;
- static int i8042_check_aux_cookie;
+ unsigned long flags;
+ unsigned char str, data;
+
+ spin_lock_irqsave(&i8042_lock, flags);
+ str = i8042_read_status();
+ if (str & I8042_STR_OBF) {
+ data = i8042_read_data();
+ if (i8042_irq_being_tested &&
+ data == 0xa5 && (str & I8042_STR_AUXDATA))
+ complete(&i8042_aux_irq_delivered);
+ }
+ spin_unlock_irqrestore(&i8042_lock, flags);
+
+ return IRQ_HANDLED;
+}
+
/*
- * Check if AUX irq is available. If it isn't, then there is no point
- * in trying to detect AUX presence.
+ * i8042_check_aux() applies as much paranoia as it can at detecting
+ * the presence of an AUX interface.
*/
- if (request_irq(values->irq, i8042_interrupt, SA_SHIRQ,
- "i8042", &i8042_check_aux_cookie))
- return -1;
- free_irq(values->irq, &i8042_check_aux_cookie);
+static int __devinit i8042_check_aux(void)
+{
+ int retval = -1;
+ int irq_registered = 0;
+ int aux_loop_broken = 0;
+ unsigned long flags;
+ unsigned char param;
/*
* Get rid of bytes in the queue.
*/
param = 0x5a;
- if (i8042_command(¶m, I8042_CMD_AUX_LOOP) || param != 0xa5) {
+ retval = i8042_command(¶m, I8042_CMD_AUX_LOOP);
+ if (retval || param != 0x5a) {
/*
* External connection test - filters out AT-soldered PS/2 i8042's
* AUX ports, we test for this only when the LOOP command failed.
*/
- if (i8042_command(¶m, I8042_CMD_AUX_TEST)
- || (param && param != 0xfa && param != 0xff))
- return -1;
+ if (i8042_command(¶m, I8042_CMD_AUX_TEST) ||
+ (param && param != 0xfa && param != 0xff))
+ return -1;
+
+/*
+ * If AUX_LOOP completed without error but returned unexpected data
+ * mark it as broken
+ */
+ if (!retval)
+ aux_loop_broken = 1;
}
/*
return -1;
/*
- * Disable the interface.
+ * Test AUX IRQ delivery to make sure BIOS did not grab the IRQ and
+ * used it for a PCI card or somethig else.
*/
- i8042_ctr |= I8042_CTR_AUXDIS;
- i8042_ctr &= ~I8042_CTR_AUXINT;
+ if (i8042_noloop || aux_loop_broken) {
+/*
+ * Without LOOP command we can't test AUX IRQ delivery. Assume the port
+ * is working and hope we are right.
+ */
+ retval = 0;
+ goto out;
+ }
- if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR))
- return -1;
+ if (request_irq(I8042_AUX_IRQ, i8042_aux_test_irq, IRQF_SHARED,
+ "i8042", i8042_platform_device))
+ goto out;
- return 0;
-}
+ irq_registered = 1;
+ if (i8042_enable_aux_port())
+ goto out;
+
+ spin_lock_irqsave(&i8042_lock, flags);
+ init_completion(&i8042_aux_irq_delivered);
+ i8042_irq_being_tested = 1;
+
+ param = 0xa5;
+ retval = __i8042_command(¶m, I8042_CMD_AUX_LOOP & 0xf0ff);
+
+ spin_unlock_irqrestore(&i8042_lock, flags);
+
+ if (retval)
+ goto out;
+
+ if (wait_for_completion_timeout(&i8042_aux_irq_delivered,
+ msecs_to_jiffies(250)) == 0) {
/*
- * i8042_port_register() marks the device as existing,
- * registers it, and reports to the user.
+ * AUX IRQ was never delivered so we need to flush the controller to
+ * get rid of the byte we put there; otherwise keyboard may not work.
*/
+ i8042_flush();
+ retval = -1;
+ }
-static int __init i8042_port_register(struct serio *port)
-{
- struct i8042_values *values = port->port_data;
+ out:
- values->exists = 1;
+/*
+ * Disable the interface.
+ */
- i8042_ctr &= ~values->disable;
+ i8042_ctr |= I8042_CTR_AUXDIS;
+ i8042_ctr &= ~I8042_CTR_AUXINT;
- if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
- printk(KERN_WARNING "i8042.c: Can't write CTR while registering.\n");
- values->exists = 0;
- return -1;
- }
+ if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR))
+ retval = -1;
- printk(KERN_INFO "serio: i8042 %s port at %#lx,%#lx irq %d\n",
- values->name,
- (unsigned long) I8042_DATA_REG,
- (unsigned long) I8042_COMMAND_REG,
- values->irq);
+ if (irq_registered)
+ free_irq(I8042_AUX_IRQ, i8042_platform_device);
- serio_register_port(port);
+ return retval;
+}
+
+static int i8042_controller_check(void)
+{
+ if (i8042_flush() == I8042_BUFFER_SIZE) {
+ printk(KERN_ERR "i8042.c: No controller found.\n");
+ return -ENODEV;
+ }
return 0;
}
-
-static void i8042_timer_func(unsigned long data)
+static int i8042_controller_selftest(void)
{
- i8042_interrupt(0, NULL, NULL);
-}
+ unsigned char param;
+ if (!i8042_reset)
+ return 0;
+
+ if (i8042_command(¶m, I8042_CMD_CTL_TEST)) {
+ printk(KERN_ERR "i8042.c: i8042 controller self test timeout.\n");
+ return -ENODEV;
+ }
+
+ if (param != I8042_RET_CTL_TEST) {
+ printk(KERN_ERR "i8042.c: i8042 controller selftest failed. (%#x != %#x)\n",
+ param, I8042_RET_CTL_TEST);
+ return -EIO;
+ }
+
+ return 0;
+}
/*
* i8042_controller init initializes the i8042 controller, and,
{
unsigned long flags;
-/*
- * Test the i8042. We need to know if it thinks it's working correctly
- * before doing anything else.
- */
-
- i8042_flush();
-
- if (i8042_reset) {
-
- unsigned char param;
-
- if (i8042_command(¶m, I8042_CMD_CTL_TEST)) {
- printk(KERN_ERR "i8042.c: i8042 controller self test timeout.\n");
- return -1;
- }
-
- if (param != I8042_RET_CTL_TEST) {
- printk(KERN_ERR "i8042.c: i8042 controller selftest failed. (%#x != %#x)\n",
- param, I8042_RET_CTL_TEST);
- return -1;
- }
- }
-
/*
* Save the CTR for restoral on unload / reboot.
*/
if (i8042_command(&i8042_ctr, I8042_CMD_CTL_RCTR)) {
printk(KERN_ERR "i8042.c: Can't read CTR while initializing i8042.\n");
- return -1;
+ return -EIO;
}
i8042_initial_ctr = i8042_ctr;
if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
printk(KERN_ERR "i8042.c: Can't write CTR while initializing i8042.\n");
- return -1;
+ return -EIO;
}
return 0;
/*
- * Reset the controller.
+ * Reset the controller and reset CRT to the original value set by BIOS.
*/
-void i8042_controller_reset(void)
+
+static void i8042_controller_reset(void)
{
- unsigned char param;
+ i8042_flush();
/*
- * Reset the controller if requested.
+ * Disable MUX mode if present.
*/
- if (i8042_reset)
- if (i8042_command(¶m, I8042_CMD_CTL_TEST))
- printk(KERN_ERR "i8042.c: i8042 controller reset timeout.\n");
+ if (i8042_mux_present)
+ i8042_set_mux_mode(0, NULL);
/*
- * Disable MUX mode if present.
+ * Reset the controller if requested.
*/
- if (i8042_mux_present)
- i8042_set_mux_mode(0, NULL);
+ i8042_controller_selftest();
/*
* Restore the original control register setting.
*/
- i8042_ctr = i8042_initial_ctr;
-
- if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR))
+ if (i8042_command(&i8042_initial_ctr, I8042_CMD_CTL_WCTR))
printk(KERN_WARNING "i8042.c: Can't restore CTR.\n");
}
* able to talk to the hardware when rebooting.
*/
-void i8042_controller_cleanup(void)
+static void i8042_controller_cleanup(void)
{
int i;
- i8042_flush();
-
/*
* Reset anything that is connected to the ports.
*/
- if (i8042_kbd_values.exists)
- serio_cleanup(i8042_kbd_port);
-
- if (i8042_aux_values.exists)
- serio_cleanup(i8042_aux_port);
-
- for (i = 0; i < I8042_NUM_MUX_PORTS; i++)
- if (i8042_mux_values[i].exists)
- serio_cleanup(i8042_mux_port[i]);
+ for (i = 0; i < I8042_NUM_PORTS; i++)
+ if (i8042_ports[i].serio)
+ serio_cleanup(i8042_ports[i].serio);
i8042_controller_reset();
}
-static int blink_frequency = 500;
-module_param_named(panicblink, blink_frequency, int, 0600);
+/*
+ * i8042_panic_blink() will flash the keyboard LEDs and is called when
+ * kernel panics. Flashing LEDs is useful for users running X who may
+ * not see the console and will help distingushing panics from "real"
+ * lockups.
+ *
+ * Note that DELAY has a limit of 10ms so we will not get stuck here
+ * waiting for KBC to free up even if KBD interrupt is off
+ */
-/* Catch the case when the kbd interrupt is off */
#define DELAY do { mdelay(1); if (++delay > 10) return delay; } while(0)
-/* Tell the user who may be running in X and not see the console that we have
- panic'ed. This is to distingush panics from "real" lockups. */
static long i8042_panic_blink(long count)
{
long delay = 0;
static long last_blink;
static char led;
- /* Roughly 1/2s frequency. KDB uses about 1s. Make sure it is
- different. */
- if (!blink_frequency)
+
+ /*
+ * We expect frequency to be about 1/2s. KDB uses about 1s.
+ * Make sure they are different.
+ */
+ if (!i8042_blink_frequency)
return 0;
- if (count - last_blink < blink_frequency)
+ if (count - last_blink < i8042_blink_frequency)
return 0;
+
led ^= 0x01 | 0x04;
while (i8042_read_status() & I8042_STR_IBF)
DELAY;
+ dbg("%02x -> i8042 (panic blink)", 0xed);
+ i8042_suppress_kbd_ack = 2;
i8042_write_data(0xed); /* set leds */
DELAY;
while (i8042_read_status() & I8042_STR_IBF)
DELAY;
DELAY;
+ dbg("%02x -> i8042 (panic blink)", led);
i8042_write_data(led);
DELAY;
last_blink = count;
* Here we try to restore the original BIOS settings
*/
-static int i8042_suspend(struct device *dev, u32 state, u32 level)
+static int i8042_suspend(struct platform_device *dev, pm_message_t state)
{
- if (level == SUSPEND_DISABLE) {
- del_timer_sync(&i8042_timer);
- i8042_controller_reset();
- }
+ i8042_controller_cleanup();
return 0;
}
* Here we try to reset everything back to a state in which suspended
*/
-static int i8042_resume(struct device *dev, u32 level)
+static int i8042_resume(struct platform_device *dev)
{
- int i;
-
- if (level != RESUME_ENABLE)
- return 0;
+ int error;
- if (i8042_controller_init()) {
- printk(KERN_ERR "i8042: resume failed\n");
- return -1;
- }
+ error = i8042_controller_check();
+ if (error)
+ return error;
- if (i8042_mux_present)
- if (i8042_set_mux_mode(1, NULL) ||
- i8042_enable_mux_ports(&i8042_aux_values)) {
- printk(KERN_WARNING "i8042: failed to resume active multiplexor, mouse won't work.\n");
- }
+ error = i8042_controller_selftest();
+ if (error)
+ return error;
/*
- * Reconnect anything that was connected to the ports.
+ * Restore pre-resume CTR value and disable all ports
*/
- if (i8042_kbd_values.exists && i8042_activate_port(i8042_kbd_port) == 0)
- serio_reconnect(i8042_kbd_port);
+ i8042_ctr |= I8042_CTR_AUXDIS | I8042_CTR_KBDDIS;
+ i8042_ctr &= ~(I8042_CTR_AUXINT | I8042_CTR_KBDINT);
+ if (i8042_command(&i8042_ctr, I8042_CMD_CTL_WCTR)) {
+ printk(KERN_ERR "i8042: Can't write CTR to resume\n");
+ return -EIO;
+ }
- if (i8042_aux_values.exists && i8042_activate_port(i8042_aux_port) == 0)
- serio_reconnect(i8042_aux_port);
+ if (i8042_mux_present) {
+ if (i8042_set_mux_mode(1, NULL) || i8042_enable_mux_ports())
+ printk(KERN_WARNING
+ "i8042: failed to resume active multiplexor, "
+ "mouse won't work.\n");
+ } else if (i8042_ports[I8042_AUX_PORT_NO].serio)
+ i8042_enable_aux_port();
- for (i = 0; i < I8042_NUM_MUX_PORTS; i++)
- if (i8042_mux_values[i].exists && i8042_activate_port(i8042_mux_port[i]) == 0)
- serio_reconnect(i8042_mux_port[i]);
-/*
- * Restart timer (for polling "stuck" data)
- */
- mod_timer(&i8042_timer, jiffies + I8042_POLL_PERIOD);
+ if (i8042_ports[I8042_KBD_PORT_NO].serio)
+ i8042_enable_kbd_port();
- panic_blink = i8042_panic_blink;
+ i8042_interrupt(0, NULL);
return 0;
-
}
/*
* because otherwise BIOSes will be confused.
*/
-static void i8042_shutdown(struct device *dev)
+static void i8042_shutdown(struct platform_device *dev)
{
i8042_controller_cleanup();
}
-static struct device_driver i8042_driver = {
- .name = "i8042",
- .bus = &platform_bus_type,
- .suspend = i8042_suspend,
- .resume = i8042_resume,
- .shutdown = i8042_shutdown,
-};
-
-static struct serio * __init i8042_allocate_kbd_port(void)
+static int __devinit i8042_create_kbd_port(void)
{
struct serio *serio;
+ struct i8042_port *port = &i8042_ports[I8042_KBD_PORT_NO];
- serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
- if (serio) {
- memset(serio, 0, sizeof(struct serio));
- serio->type = i8042_direct ? SERIO_8042 : SERIO_8042_XL,
- serio->write = i8042_dumbkbd ? NULL : i8042_kbd_write,
- serio->open = i8042_open,
- serio->close = i8042_close,
- serio->port_data = &i8042_kbd_values,
- serio->dev.parent = &i8042_platform_device->dev;
- strlcpy(serio->name, "i8042 Kbd Port", sizeof(serio->name));
- strlcpy(serio->phys, I8042_KBD_PHYS_DESC, sizeof(serio->phys));
- }
+ serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
+ if (!serio)
+ return -ENOMEM;
+
+ serio->id.type = i8042_direct ? SERIO_8042 : SERIO_8042_XL;
+ serio->write = i8042_dumbkbd ? NULL : i8042_kbd_write;
+ serio->start = i8042_start;
+ serio->stop = i8042_stop;
+ serio->port_data = port;
+ serio->dev.parent = &i8042_platform_device->dev;
+ strlcpy(serio->name, "i8042 KBD port", sizeof(serio->name));
+ strlcpy(serio->phys, I8042_KBD_PHYS_DESC, sizeof(serio->phys));
+
+ port->serio = serio;
+ port->irq = I8042_KBD_IRQ;
- return serio;
+ return 0;
}
-static struct serio * __init i8042_allocate_aux_port(void)
+static int __devinit i8042_create_aux_port(int idx)
{
struct serio *serio;
-
- serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
- if (serio) {
- memset(serio, 0, sizeof(struct serio));
- serio->type = SERIO_8042;
- serio->write = i8042_aux_write;
- serio->open = i8042_open;
- serio->close = i8042_close;
- serio->port_data = &i8042_aux_values,
- serio->dev.parent = &i8042_platform_device->dev;
- strlcpy(serio->name, "i8042 Aux Port", sizeof(serio->name));
+ int port_no = idx < 0 ? I8042_AUX_PORT_NO : I8042_MUX_PORT_NO + idx;
+ struct i8042_port *port = &i8042_ports[port_no];
+
+ serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
+ if (!serio)
+ return -ENOMEM;
+
+ serio->id.type = SERIO_8042;
+ serio->write = i8042_aux_write;
+ serio->start = i8042_start;
+ serio->stop = i8042_stop;
+ serio->port_data = port;
+ serio->dev.parent = &i8042_platform_device->dev;
+ if (idx < 0) {
+ strlcpy(serio->name, "i8042 AUX port", sizeof(serio->name));
strlcpy(serio->phys, I8042_AUX_PHYS_DESC, sizeof(serio->phys));
+ } else {
+ snprintf(serio->name, sizeof(serio->name), "i8042 AUX%d port", idx);
+ snprintf(serio->phys, sizeof(serio->phys), I8042_MUX_PHYS_DESC, idx + 1);
}
- return serio;
+ port->serio = serio;
+ port->mux = idx;
+ port->irq = I8042_AUX_IRQ;
+
+ return 0;
}
-static struct serio * __init i8042_allocate_mux_port(int index)
+static void __devinit i8042_free_kbd_port(void)
{
- struct serio *serio;
- struct i8042_values *values = &i8042_mux_values[index];
-
- serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
- if (serio) {
- *values = i8042_aux_values;
- snprintf(values->name, sizeof(values->name), "AUX%d", index);
- values->mux = index;
-
- memset(serio, 0, sizeof(struct serio));
- serio->type = SERIO_8042;
- serio->write = i8042_aux_write;
- serio->open = i8042_open;
- serio->close = i8042_close;
- serio->port_data = values;
- serio->dev.parent = &i8042_platform_device->dev;
- snprintf(serio->name, sizeof(serio->name), "i8042 Aux-%d Port", index);
- snprintf(serio->phys, sizeof(serio->phys), I8042_MUX_PHYS_DESC, index + 1);
+ kfree(i8042_ports[I8042_KBD_PORT_NO].serio);
+ i8042_ports[I8042_KBD_PORT_NO].serio = NULL;
+}
+
+static void __devinit i8042_free_aux_ports(void)
+{
+ int i;
+
+ for (i = I8042_AUX_PORT_NO; i < I8042_NUM_PORTS; i++) {
+ kfree(i8042_ports[i].serio);
+ i8042_ports[i].serio = NULL;
}
+}
+
+static void __devinit i8042_register_ports(void)
+{
+ int i;
- return serio;
+ for (i = 0; i < I8042_NUM_PORTS; i++) {
+ if (i8042_ports[i].serio) {
+ printk(KERN_INFO "serio: %s at %#lx,%#lx irq %d\n",
+ i8042_ports[i].serio->name,
+ (unsigned long) I8042_DATA_REG,
+ (unsigned long) I8042_COMMAND_REG,
+ i8042_ports[i].irq);
+ serio_register_port(i8042_ports[i].serio);
+ }
+ }
}
-int __init i8042_init(void)
+static void __devinit i8042_unregister_ports(void)
{
int i;
- int err;
- dbg_init();
+ for (i = 0; i < I8042_NUM_PORTS; i++) {
+ if (i8042_ports[i].serio) {
+ serio_unregister_port(i8042_ports[i].serio);
+ i8042_ports[i].serio = NULL;
+ }
+ }
+}
- init_timer(&i8042_timer);
- i8042_timer.function = i8042_timer_func;
+static void i8042_free_irqs(void)
+{
+ if (i8042_aux_irq_registered)
+ free_irq(I8042_AUX_IRQ, i8042_platform_device);
+ if (i8042_kbd_irq_registered)
+ free_irq(I8042_KBD_IRQ, i8042_platform_device);
- if (i8042_platform_init())
- return -EBUSY;
+ i8042_aux_irq_registered = i8042_kbd_irq_registered = 0;
+}
- i8042_aux_values.irq = I8042_AUX_IRQ;
- i8042_kbd_values.irq = I8042_KBD_IRQ;
+static int __devinit i8042_setup_aux(void)
+{
+ int (*aux_enable)(void);
+ int error;
+ int i;
- if (i8042_controller_init())
+ if (i8042_check_aux())
return -ENODEV;
- err = driver_register(&i8042_driver);
- if (err)
- return err;
+ if (i8042_nomux || i8042_check_mux()) {
+ error = i8042_create_aux_port(-1);
+ if (error)
+ goto err_free_ports;
+ aux_enable = i8042_enable_aux_port;
+ } else {
+ for (i = 0; i < I8042_NUM_MUX_PORTS; i++) {
+ error = i8042_create_aux_port(i);
+ if (error)
+ goto err_free_ports;
+ }
+ aux_enable = i8042_enable_mux_ports;
+ }
+
+ error = request_irq(I8042_AUX_IRQ, i8042_interrupt, IRQF_SHARED,
+ "i8042", i8042_platform_device);
+ if (error)
+ goto err_free_ports;
+
+ if (aux_enable())
+ goto err_free_irq;
+
+ i8042_aux_irq_registered = 1;
+ return 0;
+
+ err_free_irq:
+ free_irq(I8042_AUX_IRQ, i8042_platform_device);
+ err_free_ports:
+ i8042_free_aux_ports();
+ return error;
+}
+
+static int __devinit i8042_setup_kbd(void)
+{
+ int error;
- i8042_platform_device = platform_device_register_simple("i8042", -1, NULL, 0);
- if (IS_ERR(i8042_platform_device)) {
- driver_unregister(&i8042_driver);
- return PTR_ERR(i8042_platform_device);
+ error = i8042_create_kbd_port();
+ if (error)
+ return error;
+
+ error = request_irq(I8042_KBD_IRQ, i8042_interrupt, IRQF_SHARED,
+ "i8042", i8042_platform_device);
+ if (error)
+ goto err_free_port;
+
+ error = i8042_enable_kbd_port();
+ if (error)
+ goto err_free_irq;
+
+ i8042_kbd_irq_registered = 1;
+ return 0;
+
+ err_free_irq:
+ free_irq(I8042_KBD_IRQ, i8042_platform_device);
+ err_free_port:
+ i8042_free_kbd_port();
+ return error;
+}
+
+static int __devinit i8042_probe(struct platform_device *dev)
+{
+ int error;
+
+ error = i8042_controller_selftest();
+ if (error)
+ return error;
+
+ error = i8042_controller_init();
+ if (error)
+ return error;
+
+ if (!i8042_noaux) {
+ error = i8042_setup_aux();
+ if (error && error != -ENODEV && error != -EBUSY)
+ goto out_fail;
}
- if (!i8042_noaux && !i8042_check_aux(&i8042_aux_values)) {
- if (!i8042_nomux && !i8042_check_mux(&i8042_aux_values))
- for (i = 0; i < I8042_NUM_MUX_PORTS; i++) {
- i8042_mux_port[i] = i8042_allocate_mux_port(i);
- if (i8042_mux_port[i])
- i8042_port_register(i8042_mux_port[i]);
- }
- else {
- i8042_aux_port = i8042_allocate_aux_port();
- if (i8042_aux_port)
- i8042_port_register(i8042_aux_port);
- }
+ if (!i8042_nokbd) {
+ error = i8042_setup_kbd();
+ if (error)
+ goto out_fail;
}
- i8042_kbd_port = i8042_allocate_kbd_port();
- if (i8042_kbd_port)
- i8042_port_register(i8042_kbd_port);
+/*
+ * Ok, everything is ready, let's register all serio ports
+ */
+ i8042_register_ports();
+
+ return 0;
+
+ out_fail:
+ i8042_free_aux_ports(); /* in case KBD failed but AUX not */
+ i8042_free_irqs();
+ i8042_controller_reset();
- mod_timer(&i8042_timer, jiffies + I8042_POLL_PERIOD);
+ return error;
+}
+
+static int __devexit i8042_remove(struct platform_device *dev)
+{
+ i8042_unregister_ports();
+ i8042_free_irqs();
+ i8042_controller_reset();
return 0;
}
-void __exit i8042_exit(void)
+static struct platform_driver i8042_driver = {
+ .driver = {
+ .name = "i8042",
+ .owner = THIS_MODULE,
+ },
+ .probe = i8042_probe,
+ .remove = __devexit_p(i8042_remove),
+ .suspend = i8042_suspend,
+ .resume = i8042_resume,
+ .shutdown = i8042_shutdown,
+};
+
+static int __init i8042_init(void)
{
- int i;
+ int err;
- i8042_controller_cleanup();
+ dbg_init();
+
+ err = i8042_platform_init();
+ if (err)
+ return err;
+
+ err = i8042_controller_check();
+ if (err)
+ goto err_platform_exit;
- if (i8042_kbd_values.exists)
- serio_unregister_port(i8042_kbd_port);
+ err = platform_driver_register(&i8042_driver);
+ if (err)
+ goto err_platform_exit;
- if (i8042_aux_values.exists)
- serio_unregister_port(i8042_aux_port);
+ i8042_platform_device = platform_device_alloc("i8042", -1);
+ if (!i8042_platform_device) {
+ err = -ENOMEM;
+ goto err_unregister_driver;
+ }
- for (i = 0; i < I8042_NUM_MUX_PORTS; i++)
- if (i8042_mux_values[i].exists)
- serio_unregister_port(i8042_mux_port[i]);
+ err = platform_device_add(i8042_platform_device);
+ if (err)
+ goto err_free_device;
- del_timer_sync(&i8042_timer);
+ panic_blink = i8042_panic_blink;
- platform_device_unregister(i8042_platform_device);
- driver_unregister(&i8042_driver);
+ return 0;
+ err_free_device:
+ platform_device_put(i8042_platform_device);
+ err_unregister_driver:
+ platform_driver_unregister(&i8042_driver);
+ err_platform_exit:
+ i8042_platform_exit();
+
+ return err;
+}
+
+static void __exit i8042_exit(void)
+{
+ platform_device_unregister(i8042_platform_device);
+ platform_driver_unregister(&i8042_driver);
i8042_platform_exit();
panic_blink = NULL;
git://git.onelab.eu / linux-2.6.git / blobdiff