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path: root/drivers/input/serio/hp_sdc.c
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Diffstat (limited to 'drivers/input/serio/hp_sdc.c')
-rw-r--r--drivers/input/serio/hp_sdc.c427
1 files changed, 241 insertions, 186 deletions
diff --git a/drivers/input/serio/hp_sdc.c b/drivers/input/serio/hp_sdc.c
index b57370dc4e3d..6af199805ffc 100644
--- a/drivers/input/serio/hp_sdc.c
+++ b/drivers/input/serio/hp_sdc.c
@@ -34,27 +34,27 @@
*
* Driver theory of operation:
*
- * hp_sdc_put does all writing to the SDC. ISR can run on a different
- * CPU than hp_sdc_put, but only one CPU runs hp_sdc_put at a time
+ * hp_sdc_put does all writing to the SDC. ISR can run on a different
+ * CPU than hp_sdc_put, but only one CPU runs hp_sdc_put at a time
* (it cannot really benefit from SMP anyway.) A tasket fit this perfectly.
*
- * All data coming back from the SDC is sent via interrupt and can be read
- * fully in the ISR, so there are no latency/throughput problems there.
- * The problem is with output, due to the slow clock speed of the SDC
- * compared to the CPU. This should not be too horrible most of the time,
- * but if used with HIL devices that support the multibyte transfer command,
- * keeping outbound throughput flowing at the 6500KBps that the HIL is
+ * All data coming back from the SDC is sent via interrupt and can be read
+ * fully in the ISR, so there are no latency/throughput problems there.
+ * The problem is with output, due to the slow clock speed of the SDC
+ * compared to the CPU. This should not be too horrible most of the time,
+ * but if used with HIL devices that support the multibyte transfer command,
+ * keeping outbound throughput flowing at the 6500KBps that the HIL is
* capable of is more than can be done at HZ=100.
*
- * Busy polling for IBF clear wastes CPU cycles and bus cycles. hp_sdc.ibf
- * is set to 0 when the IBF flag in the status register has cleared. ISR
- * may do this, and may also access the parts of queued transactions related
- * to reading data back from the SDC, but otherwise will not touch the
+ * Busy polling for IBF clear wastes CPU cycles and bus cycles. hp_sdc.ibf
+ * is set to 0 when the IBF flag in the status register has cleared. ISR
+ * may do this, and may also access the parts of queued transactions related
+ * to reading data back from the SDC, but otherwise will not touch the
* hp_sdc state. Whenever a register is written hp_sdc.ibf is set to 1.
*
* The i8042 write index and the values in the 4-byte input buffer
* starting at 0x70 are kept track of in hp_sdc.wi, and .r7[], respectively,
- * to minimize the amount of IO needed to the SDC. However these values
+ * to minimize the amount of IO needed to the SDC. However these values
* do not need to be locked since they are only ever accessed by hp_sdc_put.
*
* A timer task schedules the tasklet once per second just to make
@@ -100,39 +100,46 @@ EXPORT_SYMBOL(hp_sdc_release_timer_irq);
EXPORT_SYMBOL(hp_sdc_release_hil_irq);
EXPORT_SYMBOL(hp_sdc_release_cooked_irq);
+EXPORT_SYMBOL(__hp_sdc_enqueue_transaction);
EXPORT_SYMBOL(hp_sdc_enqueue_transaction);
EXPORT_SYMBOL(hp_sdc_dequeue_transaction);
static hp_i8042_sdc hp_sdc; /* All driver state is kept in here. */
/*************** primitives for use in any context *********************/
-static inline uint8_t hp_sdc_status_in8 (void) {
+static inline uint8_t hp_sdc_status_in8(void)
+{
uint8_t status;
unsigned long flags;
write_lock_irqsave(&hp_sdc.ibf_lock, flags);
status = sdc_readb(hp_sdc.status_io);
- if (!(status & HP_SDC_STATUS_IBF)) hp_sdc.ibf = 0;
+ if (!(status & HP_SDC_STATUS_IBF))
+ hp_sdc.ibf = 0;
write_unlock_irqrestore(&hp_sdc.ibf_lock, flags);
return status;
}
-static inline uint8_t hp_sdc_data_in8 (void) {
- return sdc_readb(hp_sdc.data_io);
+static inline uint8_t hp_sdc_data_in8(void)
+{
+ return sdc_readb(hp_sdc.data_io);
}
-static inline void hp_sdc_status_out8 (uint8_t val) {
+static inline void hp_sdc_status_out8(uint8_t val)
+{
unsigned long flags;
write_lock_irqsave(&hp_sdc.ibf_lock, flags);
hp_sdc.ibf = 1;
- if ((val & 0xf0) == 0xe0) hp_sdc.wi = 0xff;
+ if ((val & 0xf0) == 0xe0)
+ hp_sdc.wi = 0xff;
sdc_writeb(val, hp_sdc.status_io);
write_unlock_irqrestore(&hp_sdc.ibf_lock, flags);
}
-static inline void hp_sdc_data_out8 (uint8_t val) {
+static inline void hp_sdc_data_out8(uint8_t val)
+{
unsigned long flags;
write_lock_irqsave(&hp_sdc.ibf_lock, flags);
@@ -141,11 +148,12 @@ static inline void hp_sdc_data_out8 (uint8_t val) {
write_unlock_irqrestore(&hp_sdc.ibf_lock, flags);
}
-/* Care must be taken to only invoke hp_sdc_spin_ibf when
- * absolutely needed, or in rarely invoked subroutines.
- * Not only does it waste CPU cycles, it also wastes bus cycles.
+/* Care must be taken to only invoke hp_sdc_spin_ibf when
+ * absolutely needed, or in rarely invoked subroutines.
+ * Not only does it waste CPU cycles, it also wastes bus cycles.
*/
-static inline void hp_sdc_spin_ibf(void) {
+static inline void hp_sdc_spin_ibf(void)
+{
unsigned long flags;
rwlock_t *lock;
@@ -158,19 +166,21 @@ static inline void hp_sdc_spin_ibf(void) {
}
read_unlock(lock);
write_lock(lock);
- while (sdc_readb(hp_sdc.status_io) & HP_SDC_STATUS_IBF) {};
+ while (sdc_readb(hp_sdc.status_io) & HP_SDC_STATUS_IBF)
+ { }
hp_sdc.ibf = 0;
write_unlock_irqrestore(lock, flags);
}
/************************ Interrupt context functions ************************/
-static void hp_sdc_take (int irq, void *dev_id, uint8_t status, uint8_t data) {
+static void hp_sdc_take(int irq, void *dev_id, uint8_t status, uint8_t data)
+{
hp_sdc_transaction *curr;
read_lock(&hp_sdc.rtq_lock);
if (hp_sdc.rcurr < 0) {
- read_unlock(&hp_sdc.rtq_lock);
+ read_unlock(&hp_sdc.rtq_lock);
return;
}
curr = hp_sdc.tq[hp_sdc.rcurr];
@@ -183,25 +193,27 @@ static void hp_sdc_take (int irq, void *dev_id, uint8_t status, uint8_t data) {
if (hp_sdc.rqty <= 0) {
/* All data has been gathered. */
- if(curr->seq[curr->actidx] & HP_SDC_ACT_SEMAPHORE) {
- if (curr->act.semaphore) up(curr->act.semaphore);
- }
- if(curr->seq[curr->actidx] & HP_SDC_ACT_CALLBACK) {
+ if (curr->seq[curr->actidx] & HP_SDC_ACT_SEMAPHORE)
+ if (curr->act.semaphore)
+ up(curr->act.semaphore);
+
+ if (curr->seq[curr->actidx] & HP_SDC_ACT_CALLBACK)
if (curr->act.irqhook)
curr->act.irqhook(irq, dev_id, status, data);
- }
+
curr->actidx = curr->idx;
curr->idx++;
/* Return control of this transaction */
write_lock(&hp_sdc.rtq_lock);
- hp_sdc.rcurr = -1;
+ hp_sdc.rcurr = -1;
hp_sdc.rqty = 0;
write_unlock(&hp_sdc.rtq_lock);
tasklet_schedule(&hp_sdc.task);
}
}
-static irqreturn_t hp_sdc_isr(int irq, void *dev_id) {
+static irqreturn_t hp_sdc_isr(int irq, void *dev_id)
+{
uint8_t status, data;
status = hp_sdc_status_in8();
@@ -209,67 +221,74 @@ static irqreturn_t hp_sdc_isr(int irq, void *dev_id) {
data = hp_sdc_data_in8();
/* For now we are ignoring these until we get the SDC to behave. */
- if (((status & 0xf1) == 0x51) && data == 0x82) {
- return IRQ_HANDLED;
- }
+ if (((status & 0xf1) == 0x51) && data == 0x82)
+ return IRQ_HANDLED;
- switch(status & HP_SDC_STATUS_IRQMASK) {
- case 0: /* This case is not documented. */
+ switch (status & HP_SDC_STATUS_IRQMASK) {
+ case 0: /* This case is not documented. */
break;
- case HP_SDC_STATUS_USERTIMER:
- case HP_SDC_STATUS_PERIODIC:
- case HP_SDC_STATUS_TIMER:
+
+ case HP_SDC_STATUS_USERTIMER:
+ case HP_SDC_STATUS_PERIODIC:
+ case HP_SDC_STATUS_TIMER:
read_lock(&hp_sdc.hook_lock);
- if (hp_sdc.timer != NULL)
+ if (hp_sdc.timer != NULL)
hp_sdc.timer(irq, dev_id, status, data);
read_unlock(&hp_sdc.hook_lock);
break;
- case HP_SDC_STATUS_REG:
+
+ case HP_SDC_STATUS_REG:
hp_sdc_take(irq, dev_id, status, data);
break;
- case HP_SDC_STATUS_HILCMD:
- case HP_SDC_STATUS_HILDATA:
+
+ case HP_SDC_STATUS_HILCMD:
+ case HP_SDC_STATUS_HILDATA:
read_lock(&hp_sdc.hook_lock);
if (hp_sdc.hil != NULL)
hp_sdc.hil(irq, dev_id, status, data);
read_unlock(&hp_sdc.hook_lock);
break;
- case HP_SDC_STATUS_PUP:
+
+ case HP_SDC_STATUS_PUP:
read_lock(&hp_sdc.hook_lock);
if (hp_sdc.pup != NULL)
hp_sdc.pup(irq, dev_id, status, data);
- else printk(KERN_INFO PREFIX "HP SDC reports successful PUP.\n");
+ else
+ printk(KERN_INFO PREFIX "HP SDC reports successful PUP.\n");
read_unlock(&hp_sdc.hook_lock);
break;
- default:
+
+ default:
read_lock(&hp_sdc.hook_lock);
if (hp_sdc.cooked != NULL)
hp_sdc.cooked(irq, dev_id, status, data);
read_unlock(&hp_sdc.hook_lock);
break;
}
+
return IRQ_HANDLED;
}
-static irqreturn_t hp_sdc_nmisr(int irq, void *dev_id) {
+static irqreturn_t hp_sdc_nmisr(int irq, void *dev_id)
+{
int status;
-
+
status = hp_sdc_status_in8();
printk(KERN_WARNING PREFIX "NMI !\n");
-#if 0
+#if 0
if (status & HP_SDC_NMISTATUS_FHS) {
read_lock(&hp_sdc.hook_lock);
- if (hp_sdc.timer != NULL)
+ if (hp_sdc.timer != NULL)
hp_sdc.timer(irq, dev_id, status, 0);
read_unlock(&hp_sdc.hook_lock);
- }
- else {
+ } else {
/* TODO: pass this on to the HIL handler, or do SAK here? */
printk(KERN_WARNING PREFIX "HIL NMI\n");
}
#endif
+
return IRQ_HANDLED;
}
@@ -278,13 +297,17 @@ static irqreturn_t hp_sdc_nmisr(int irq, void *dev_id) {
unsigned long hp_sdc_put(void);
-static void hp_sdc_tasklet(unsigned long foo) {
-
+static void hp_sdc_tasklet(unsigned long foo)
+{
write_lock_irq(&hp_sdc.rtq_lock);
+
if (hp_sdc.rcurr >= 0) {
struct timeval tv;
+
do_gettimeofday(&tv);
- if (tv.tv_sec > hp_sdc.rtv.tv_sec) tv.tv_usec += 1000000;
+ if (tv.tv_sec > hp_sdc.rtv.tv_sec)
+ tv.tv_usec += USEC_PER_SEC;
+
if (tv.tv_usec - hp_sdc.rtv.tv_usec > HP_SDC_MAX_REG_DELAY) {
hp_sdc_transaction *curr;
uint8_t tmp;
@@ -300,27 +323,29 @@ static void hp_sdc_tasklet(unsigned long foo) {
hp_sdc.rqty = 0;
tmp = curr->seq[curr->actidx];
curr->seq[curr->actidx] |= HP_SDC_ACT_DEAD;
- if(tmp & HP_SDC_ACT_SEMAPHORE) {
- if (curr->act.semaphore)
+ if (tmp & HP_SDC_ACT_SEMAPHORE)
+ if (curr->act.semaphore)
up(curr->act.semaphore);
- }
- if(tmp & HP_SDC_ACT_CALLBACK) {
+
+ if (tmp & HP_SDC_ACT_CALLBACK) {
/* Note this means that irqhooks may be called
* in tasklet/bh context.
*/
- if (curr->act.irqhook)
+ if (curr->act.irqhook)
curr->act.irqhook(0, NULL, 0, 0);
}
+
curr->actidx = curr->idx;
curr->idx++;
- hp_sdc.rcurr = -1;
+ hp_sdc.rcurr = -1;
}
}
write_unlock_irq(&hp_sdc.rtq_lock);
hp_sdc_put();
}
-unsigned long hp_sdc_put(void) {
+unsigned long hp_sdc_put(void)
+{
hp_sdc_transaction *curr;
uint8_t act;
int idx, curridx;
@@ -333,19 +358,24 @@ unsigned long hp_sdc_put(void) {
requires output, so we skip to the administrativa. */
if (hp_sdc.ibf) {
hp_sdc_status_in8();
- if (hp_sdc.ibf) goto finish;
+ if (hp_sdc.ibf)
+ goto finish;
}
anew:
/* See if we are in the middle of a sequence. */
- if (hp_sdc.wcurr < 0) hp_sdc.wcurr = 0;
+ if (hp_sdc.wcurr < 0)
+ hp_sdc.wcurr = 0;
read_lock_irq(&hp_sdc.rtq_lock);
- if (hp_sdc.rcurr == hp_sdc.wcurr) hp_sdc.wcurr++;
+ if (hp_sdc.rcurr == hp_sdc.wcurr)
+ hp_sdc.wcurr++;
read_unlock_irq(&hp_sdc.rtq_lock);
- if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN) hp_sdc.wcurr = 0;
+ if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN)
+ hp_sdc.wcurr = 0;
curridx = hp_sdc.wcurr;
- if (hp_sdc.tq[curridx] != NULL) goto start;
+ if (hp_sdc.tq[curridx] != NULL)
+ goto start;
while (++curridx != hp_sdc.wcurr) {
if (curridx >= HP_SDC_QUEUE_LEN) {
@@ -358,7 +388,8 @@ unsigned long hp_sdc_put(void) {
continue;
}
read_unlock_irq(&hp_sdc.rtq_lock);
- if (hp_sdc.tq[curridx] != NULL) break; /* Found one. */
+ if (hp_sdc.tq[curridx] != NULL)
+ break; /* Found one. */
}
if (curridx == hp_sdc.wcurr) { /* There's nothing queued to do. */
curridx = -1;
@@ -374,7 +405,8 @@ unsigned long hp_sdc_put(void) {
goto finish;
}
- if (hp_sdc.wcurr == -1) goto done;
+ if (hp_sdc.wcurr == -1)
+ goto done;
curr = hp_sdc.tq[curridx];
idx = curr->actidx;
@@ -383,20 +415,23 @@ unsigned long hp_sdc_put(void) {
hp_sdc.tq[curridx] = NULL;
/* Interleave outbound data between the transactions. */
hp_sdc.wcurr++;
- if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN) hp_sdc.wcurr = 0;
- goto finish;
+ if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN)
+ hp_sdc.wcurr = 0;
+ goto finish;
}
act = curr->seq[idx];
idx++;
if (curr->idx >= curr->endidx) {
- if (act & HP_SDC_ACT_DEALLOC) kfree(curr);
+ if (act & HP_SDC_ACT_DEALLOC)
+ kfree(curr);
hp_sdc.tq[curridx] = NULL;
/* Interleave outbound data between the transactions. */
hp_sdc.wcurr++;
- if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN) hp_sdc.wcurr = 0;
- goto finish;
+ if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN)
+ hp_sdc.wcurr = 0;
+ goto finish;
}
while (act & HP_SDC_ACT_PRECMD) {
@@ -409,9 +444,10 @@ unsigned long hp_sdc_put(void) {
curr->idx++;
/* act finished? */
if ((act & HP_SDC_ACT_DURING) == HP_SDC_ACT_PRECMD)
- goto actdone;
+ goto actdone;
/* skip quantity field if data-out sequence follows. */
- if (act & HP_SDC_ACT_DATAOUT) curr->idx++;
+ if (act & HP_SDC_ACT_DATAOUT)
+ curr->idx++;
goto finish;
}
if (act & HP_SDC_ACT_DATAOUT) {
@@ -423,15 +459,15 @@ unsigned long hp_sdc_put(void) {
hp_sdc_data_out8(curr->seq[curr->idx]);
curr->idx++;
/* act finished? */
- if ((curr->idx - idx >= qty) &&
- ((act & HP_SDC_ACT_DURING) == HP_SDC_ACT_DATAOUT))
+ if (curr->idx - idx >= qty &&
+ (act & HP_SDC_ACT_DURING) == HP_SDC_ACT_DATAOUT)
goto actdone;
goto finish;
}
idx += qty;
act &= ~HP_SDC_ACT_DATAOUT;
- }
- else while (act & HP_SDC_ACT_DATAREG) {
+ } else
+ while (act & HP_SDC_ACT_DATAREG) {
int mask;
uint8_t w7[4];
@@ -445,26 +481,30 @@ unsigned long hp_sdc_put(void) {
act &= ~HP_SDC_ACT_DATAREG;
break;
}
-
+
w7[0] = (mask & 1) ? curr->seq[++idx] : hp_sdc.r7[0];
w7[1] = (mask & 2) ? curr->seq[++idx] : hp_sdc.r7[1];
w7[2] = (mask & 4) ? curr->seq[++idx] : hp_sdc.r7[2];
w7[3] = (mask & 8) ? curr->seq[++idx] : hp_sdc.r7[3];
-
+
if (hp_sdc.wi > 0x73 || hp_sdc.wi < 0x70 ||
- w7[hp_sdc.wi-0x70] == hp_sdc.r7[hp_sdc.wi-0x70]) {
+ w7[hp_sdc.wi - 0x70] == hp_sdc.r7[hp_sdc.wi - 0x70]) {
int i = 0;
- /* Need to point the write index register */
- while ((i < 4) && w7[i] == hp_sdc.r7[i]) i++;
+ /* Need to point the write index register */
+ while (i < 4 && w7[i] == hp_sdc.r7[i])
+ i++;
+
if (i < 4) {
hp_sdc_status_out8(HP_SDC_CMD_SET_D0 + i);
hp_sdc.wi = 0x70 + i;
goto finish;
}
+
idx++;
if ((act & HP_SDC_ACT_DURING) == HP_SDC_ACT_DATAREG)
goto actdone;
+
curr->idx = idx;
act &= ~HP_SDC_ACT_DATAREG;
break;
@@ -476,12 +516,13 @@ unsigned long hp_sdc_put(void) {
{
int i = 0;
- while ((i < 4) && w7[i] == hp_sdc.r7[i]) i++;
+ while ((i < 4) && w7[i] == hp_sdc.r7[i])
+ i++;
if (i >= 4) {
curr->idx = idx + 1;
- if ((act & HP_SDC_ACT_DURING) ==
+ if ((act & HP_SDC_ACT_DURING) ==
HP_SDC_ACT_DATAREG)
- goto actdone;
+ goto actdone;
}
}
goto finish;
@@ -497,7 +538,7 @@ unsigned long hp_sdc_put(void) {
if (act & HP_SDC_ACT_POSTCMD) {
- uint8_t postcmd;
+ uint8_t postcmd;
/* curr->idx should == idx at this point. */
postcmd = curr->seq[idx];
@@ -505,12 +546,12 @@ unsigned long hp_sdc_put(void) {
if (act & HP_SDC_ACT_DATAIN) {
/* Start a new read */
- hp_sdc.rqty = curr->seq[curr->idx];
+ hp_sdc.rqty = curr->seq[curr->idx];
do_gettimeofday(&hp_sdc.rtv);
curr->idx++;
/* Still need to lock here in case of spurious irq. */
write_lock_irq(&hp_sdc.rtq_lock);
- hp_sdc.rcurr = curridx;
+ hp_sdc.rcurr = curridx;
write_unlock_irq(&hp_sdc.rtq_lock);
hp_sdc_status_out8(postcmd);
goto finish;
@@ -519,75 +560,86 @@ unsigned long hp_sdc_put(void) {
goto actdone;
}
-actdone:
- if (act & HP_SDC_ACT_SEMAPHORE) {
+ actdone:
+ if (act & HP_SDC_ACT_SEMAPHORE)
up(curr->act.semaphore);
- }
- else if (act & HP_SDC_ACT_CALLBACK) {
+ else if (act & HP_SDC_ACT_CALLBACK)
curr->act.irqhook(0,NULL,0,0);
- }
+
if (curr->idx >= curr->endidx) { /* This transaction is over. */
- if (act & HP_SDC_ACT_DEALLOC) kfree(curr);
+ if (act & HP_SDC_ACT_DEALLOC)
+ kfree(curr);
hp_sdc.tq[curridx] = NULL;
- }
- else {
+ } else {
curr->actidx = idx + 1;
curr->idx = idx + 2;
}
/* Interleave outbound data between the transactions. */
hp_sdc.wcurr++;
- if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN) hp_sdc.wcurr = 0;
+ if (hp_sdc.wcurr >= HP_SDC_QUEUE_LEN)
+ hp_sdc.wcurr = 0;
finish:
- /* If by some quirk IBF has cleared and our ISR has run to
+ /* If by some quirk IBF has cleared and our ISR has run to
see that that has happened, do it all again. */
- if (!hp_sdc.ibf && limit++ < 20) goto anew;
+ if (!hp_sdc.ibf && limit++ < 20)
+ goto anew;
done:
- if (hp_sdc.wcurr >= 0) tasklet_schedule(&hp_sdc.task);
+ if (hp_sdc.wcurr >= 0)
+ tasklet_schedule(&hp_sdc.task);
write_unlock(&hp_sdc.lock);
+
return 0;
}
/******* Functions called in either user or kernel context ****/
-int hp_sdc_enqueue_transaction(hp_sdc_transaction *this) {
- unsigned long flags;
+int __hp_sdc_enqueue_transaction(hp_sdc_transaction *this)
+{
int i;
if (this == NULL) {
- tasklet_schedule(&hp_sdc.task);
+ BUG();
return -EINVAL;
- };
-
- write_lock_irqsave(&hp_sdc.lock, flags);
+ }
/* Can't have same transaction on queue twice */
- for (i=0; i < HP_SDC_QUEUE_LEN; i++)
- if (hp_sdc.tq[i] == this) goto fail;
+ for (i = 0; i < HP_SDC_QUEUE_LEN; i++)
+ if (hp_sdc.tq[i] == this)
+ goto fail;
this->actidx = 0;
this->idx = 1;
/* Search for empty slot */
- for (i=0; i < HP_SDC_QUEUE_LEN; i++) {
+ for (i = 0; i < HP_SDC_QUEUE_LEN; i++)
if (hp_sdc.tq[i] == NULL) {
hp_sdc.tq[i] = this;
- write_unlock_irqrestore(&hp_sdc.lock, flags);
tasklet_schedule(&hp_sdc.task);
return 0;
}
- }
- write_unlock_irqrestore(&hp_sdc.lock, flags);
+
printk(KERN_WARNING PREFIX "No free slot to add transaction.\n");
return -EBUSY;
fail:
- write_unlock_irqrestore(&hp_sdc.lock,flags);
printk(KERN_WARNING PREFIX "Transaction add failed: transaction already queued?\n");
return -EINVAL;
}
-int hp_sdc_dequeue_transaction(hp_sdc_transaction *this) {
+int hp_sdc_enqueue_transaction(hp_sdc_transaction *this) {
+ unsigned long flags;
+ int ret;
+
+ write_lock_irqsave(&hp_sdc.lock, flags);
+ ret = __hp_sdc_enqueue_transaction(this);
+ write_unlock_irqrestore(&hp_sdc.lock,flags);
+
+ return ret;
+}
+
+int hp_sdc_dequeue_transaction(hp_sdc_transaction *this)
+{
unsigned long flags;
int i;
@@ -595,8 +647,9 @@ int hp_sdc_dequeue_transaction(hp_sdc_transaction *this) {
/* TODO: don't remove it if it's not done. */
- for (i=0; i < HP_SDC_QUEUE_LEN; i++)
- if (hp_sdc.tq[i] == this) hp_sdc.tq[i] = NULL;
+ for (i = 0; i < HP_SDC_QUEUE_LEN; i++)
+ if (hp_sdc.tq[i] == this)
+ hp_sdc.tq[i] = NULL;
write_unlock_irqrestore(&hp_sdc.lock, flags);
return 0;
@@ -605,11 +658,11 @@ int hp_sdc_dequeue_transaction(hp_sdc_transaction *this) {
/********************** User context functions **************************/
-int hp_sdc_request_timer_irq(hp_sdc_irqhook *callback) {
-
- if (callback == NULL || hp_sdc.dev == NULL) {
+int hp_sdc_request_timer_irq(hp_sdc_irqhook *callback)
+{
+ if (callback == NULL || hp_sdc.dev == NULL)
return -EINVAL;
- }
+
write_lock_irq(&hp_sdc.hook_lock);
if (hp_sdc.timer != NULL) {
write_unlock_irq(&hp_sdc.hook_lock);
@@ -629,11 +682,11 @@ int hp_sdc_request_timer_irq(hp_sdc_irqhook *callback) {
return 0;
}
-int hp_sdc_request_hil_irq(hp_sdc_irqhook *callback) {
-
- if (callback == NULL || hp_sdc.dev == NULL) {
+int hp_sdc_request_hil_irq(hp_sdc_irqhook *callback)
+{
+ if (callback == NULL || hp_sdc.dev == NULL)
return -EINVAL;
- }
+
write_lock_irq(&hp_sdc.hook_lock);
if (hp_sdc.hil != NULL) {
write_unlock_irq(&hp_sdc.hook_lock);
@@ -650,11 +703,11 @@ int hp_sdc_request_hil_irq(hp_sdc_irqhook *callback) {
return 0;
}
-int hp_sdc_request_cooked_irq(hp_sdc_irqhook *callback) {
-
- if (callback == NULL || hp_sdc.dev == NULL) {
+int hp_sdc_request_cooked_irq(hp_sdc_irqhook *callback)
+{
+ if (callback == NULL || hp_sdc.dev == NULL)
return -EINVAL;
- }
+
write_lock_irq(&hp_sdc.hook_lock);
if (hp_sdc.cooked != NULL) {
write_unlock_irq(&hp_sdc.hook_lock);
@@ -672,9 +725,8 @@ int hp_sdc_request_cooked_irq(hp_sdc_irqhook *callback) {
return 0;
}
-int hp_sdc_release_timer_irq(hp_sdc_irqhook *callback) {
-
-
+int hp_sdc_release_timer_irq(hp_sdc_irqhook *callback)
+{
write_lock_irq(&hp_sdc.hook_lock);
if ((callback != hp_sdc.timer) ||
(hp_sdc.timer == NULL)) {
@@ -694,8 +746,8 @@ int hp_sdc_release_timer_irq(hp_sdc_irqhook *callback) {
return 0;
}
-int hp_sdc_release_hil_irq(hp_sdc_irqhook *callback) {
-
+int hp_sdc_release_hil_irq(hp_sdc_irqhook *callback)
+{
write_lock_irq(&hp_sdc.hook_lock);
if ((callback != hp_sdc.hil) ||
(hp_sdc.hil == NULL)) {
@@ -715,8 +767,8 @@ int hp_sdc_release_hil_irq(hp_sdc_irqhook *callback) {
return 0;
}
-int hp_sdc_release_cooked_irq(hp_sdc_irqhook *callback) {
-
+int hp_sdc_release_cooked_irq(hp_sdc_irqhook *callback)
+{
write_lock_irq(&hp_sdc.hook_lock);
if ((callback != hp_sdc.cooked) ||
(hp_sdc.cooked == NULL)) {
@@ -738,7 +790,8 @@ int hp_sdc_release_cooked_irq(hp_sdc_irqhook *callback) {
/************************* Keepalive timer task *********************/
-void hp_sdc_kicker (unsigned long data) {
+void hp_sdc_kicker (unsigned long data)
+{
tasklet_schedule(&hp_sdc.task);
/* Re-insert the periodic task. */
mod_timer(&hp_sdc.kicker, jiffies + HZ);
@@ -748,12 +801,12 @@ void hp_sdc_kicker (unsigned long data) {
#if defined(__hppa__)
-static struct parisc_device_id hp_sdc_tbl[] = {
+static const struct parisc_device_id hp_sdc_tbl[] = {
{
- .hw_type = HPHW_FIO,
+ .hw_type = HPHW_FIO,
.hversion_rev = HVERSION_REV_ANY_ID,
.hversion = HVERSION_ANY_ID,
- .sversion = 0x73,
+ .sversion = 0x73,
},
{ 0, }
};
@@ -772,16 +825,15 @@ static struct parisc_driver hp_sdc_driver = {
static int __init hp_sdc_init(void)
{
- int i;
char *errstr;
hp_sdc_transaction t_sync;
uint8_t ts_sync[6];
struct semaphore s_sync;
- rwlock_init(&hp_sdc.lock);
- rwlock_init(&hp_sdc.ibf_lock);
- rwlock_init(&hp_sdc.rtq_lock);
- rwlock_init(&hp_sdc.hook_lock);
+ rwlock_init(&hp_sdc.lock);
+ rwlock_init(&hp_sdc.ibf_lock);
+ rwlock_init(&hp_sdc.rtq_lock);
+ rwlock_init(&hp_sdc.hook_lock);
hp_sdc.timer = NULL;
hp_sdc.hil = NULL;
@@ -796,7 +848,8 @@ static int __init hp_sdc_init(void)
hp_sdc.r7[3] = 0xff;
hp_sdc.ibf = 1;
- for (i = 0; i < HP_SDC_QUEUE_LEN; i++) hp_sdc.tq[i] = NULL;
+ memset(&hp_sdc.tq, 0, sizeof(hp_sdc.tq));
+
hp_sdc.wcurr = -1;
hp_sdc.rcurr = -1;
hp_sdc.rqty = 0;
@@ -804,27 +857,32 @@ static int __init hp_sdc_init(void)
hp_sdc.dev_err = -ENODEV;
errstr = "IO not found for";
- if (!hp_sdc.base_io) goto err0;
+ if (!hp_sdc.base_io)
+ goto err0;
errstr = "IRQ not found for";
- if (!hp_sdc.irq) goto err0;
+ if (!hp_sdc.irq)
+ goto err0;
hp_sdc.dev_err = -EBUSY;
#if defined(__hppa__)
errstr = "IO not available for";
- if (request_region(hp_sdc.data_io, 2, hp_sdc_driver.name)) goto err0;
-#endif
+ if (request_region(hp_sdc.data_io, 2, hp_sdc_driver.name))
+ goto err0;
+#endif
errstr = "IRQ not available for";
- if(request_irq(hp_sdc.irq, &hp_sdc_isr, 0, "HP SDC",
- (void *) hp_sdc.base_io)) goto err1;
+ if (request_irq(hp_sdc.irq, &hp_sdc_isr, IRQF_SHARED|IRQF_SAMPLE_RANDOM,
+ "HP SDC", &hp_sdc))
+ goto err1;
errstr = "NMI not available for";
- if (request_irq(hp_sdc.nmi, &hp_sdc_nmisr, 0, "HP SDC NMI",
- (void *) hp_sdc.base_io)) goto err2;
+ if (request_irq(hp_sdc.nmi, &hp_sdc_nmisr, IRQF_SHARED,
+ "HP SDC NMI", &hp_sdc))
+ goto err2;
- printk(KERN_INFO PREFIX "HP SDC at 0x%p, IRQ %d (NMI IRQ %d)\n",
+ printk(KERN_INFO PREFIX "HP SDC at 0x%p, IRQ %d (NMI IRQ %d)\n",
(void *)hp_sdc.base_io, hp_sdc.irq, hp_sdc.nmi);
hp_sdc_status_in8();
@@ -854,13 +912,14 @@ static int __init hp_sdc_init(void)
hp_sdc.dev_err = 0;
return 0;
err2:
- free_irq(hp_sdc.irq, NULL);
+ free_irq(hp_sdc.irq, &hp_sdc);
err1:
release_region(hp_sdc.data_io, 2);
err0:
- printk(KERN_WARNING PREFIX ": %s SDC IO=0x%p IRQ=0x%x NMI=0x%x\n",
+ printk(KERN_WARNING PREFIX ": %s SDC IO=0x%p IRQ=0x%x NMI=0x%x\n",
errstr, (void *)hp_sdc.base_io, hp_sdc.irq, hp_sdc.nmi);
hp_sdc.dev = NULL;
+
return hp_sdc.dev_err;
}
@@ -868,8 +927,10 @@ static int __init hp_sdc_init(void)
static int __init hp_sdc_init_hppa(struct parisc_device *d)
{
- if (!d) return 1;
- if (hp_sdc.dev != NULL) return 1; /* We only expect one SDC */
+ if (!d)
+ return 1;
+ if (hp_sdc.dev != NULL)
+ return 1; /* We only expect one SDC */
hp_sdc.dev = d;
hp_sdc.irq = d->irq;
@@ -898,18 +959,16 @@ static void hp_sdc_exit(void)
/* Wait until we know this has been processed by the i8042 */
hp_sdc_spin_ibf();
- free_irq(hp_sdc.nmi, NULL);
- free_irq(hp_sdc.irq, NULL);
+ free_irq(hp_sdc.nmi, &hp_sdc);
+ free_irq(hp_sdc.irq, &hp_sdc);
write_unlock_irq(&hp_sdc.lock);
del_timer(&hp_sdc.kicker);
tasklet_kill(&hp_sdc.task);
-/* release_region(hp_sdc.data_io, 2); */
-
#if defined(__hppa__)
- if (unregister_parisc_driver(&hp_sdc_driver))
+ if (unregister_parisc_driver(&hp_sdc_driver))
printk(KERN_WARNING PREFIX "Error unregistering HP SDC");
#endif
}
@@ -923,7 +982,7 @@ static int __init hp_sdc_register(void)
mm_segment_t fs;
unsigned char i;
#endif
-
+
hp_sdc.dev = NULL;
hp_sdc.dev_err = 0;
#if defined(__hppa__)
@@ -960,8 +1019,8 @@ static int __init hp_sdc_register(void)
tq_init.seq = tq_init_seq;
tq_init.act.semaphore = &tq_init_sem;
- tq_init_seq[0] =
- HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN | HP_SDC_ACT_SEMAPHORE;
+ tq_init_seq[0] =
+ HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN | HP_SDC_ACT_SEMAPHORE;
tq_init_seq[1] = HP_SDC_CMD_READ_KCC;
tq_init_seq[2] = 1;
tq_init_seq[3] = 0;
@@ -979,13 +1038,13 @@ static int __init hp_sdc_register(void)
}
hp_sdc.r11 = tq_init_seq[4];
if (hp_sdc.r11 & HP_SDC_CFG_NEW) {
- char *str;
+ const char *str;
printk(KERN_INFO PREFIX "New style SDC\n");
tq_init_seq[1] = HP_SDC_CMD_READ_XTD;
tq_init.actidx = 0;
tq_init.idx = 1;
down(&tq_init_sem);
- hp_sdc_enqueue_transaction(&tq_init);
+ hp_sdc_enqueue_transaction(&tq_init);
down(&tq_init_sem);
up(&tq_init_sem);
if ((tq_init_seq[0] & HP_SDC_ACT_DEAD) == HP_SDC_ACT_DEAD) {
@@ -995,15 +1054,13 @@ static int __init hp_sdc_register(void)
hp_sdc.r7e = tq_init_seq[4];
HP_SDC_XTD_REV_STRINGS(hp_sdc.r7e & HP_SDC_XTD_REV, str)
printk(KERN_INFO PREFIX "Revision: %s\n", str);
- if (hp_sdc.r7e & HP_SDC_XTD_BEEPER) {
+ if (hp_sdc.r7e & HP_SDC_XTD_BEEPER)
printk(KERN_INFO PREFIX "TI SN76494 beeper present\n");
- }
- if (hp_sdc.r7e & HP_SDC_XTD_BBRTC) {
+ if (hp_sdc.r7e & HP_SDC_XTD_BBRTC)
printk(KERN_INFO PREFIX "OKI MSM-58321 BBRTC present\n");
- }
printk(KERN_INFO PREFIX "Spunking the self test register to force PUP "
"on next firmware reset.\n");
- tq_init_seq[0] = HP_SDC_ACT_PRECMD |
+ tq_init_seq[0] = HP_SDC_ACT_PRECMD |
HP_SDC_ACT_DATAOUT | HP_SDC_ACT_SEMAPHORE;
tq_init_seq[1] = HP_SDC_CMD_SET_STR;
tq_init_seq[2] = 1;
@@ -1012,14 +1069,12 @@ static int __init hp_sdc_register(void)
tq_init.idx = 1;
tq_init.endidx = 4;
down(&tq_init_sem);
- hp_sdc_enqueue_transaction(&tq_init);
+ hp_sdc_enqueue_transaction(&tq_init);
down(&tq_init_sem);
up(&tq_init_sem);
- }
- else {
- printk(KERN_INFO PREFIX "Old style SDC (1820-%s).\n",
+ } else
+ printk(KERN_INFO PREFIX "Old style SDC (1820-%s).\n",
(hp_sdc.r11 & HP_SDC_CFG_REV) ? "3300" : "2564/3087");
- }
return 0;
}
@@ -1027,13 +1082,13 @@ static int __init hp_sdc_register(void)
module_init(hp_sdc_register);
module_exit(hp_sdc_exit);
-/* Timing notes: These measurements taken on my 64MHz 7100-LC (715/64)
+/* Timing notes: These measurements taken on my 64MHz 7100-LC (715/64)
* cycles cycles-adj time
* between two consecutive mfctl(16)'s: 4 n/a 63ns
* hp_sdc_spin_ibf when idle: 119 115 1.7us
* gsc_writeb status register: 83 79 1.2us
* IBF to clear after sending SET_IM: 6204 6006 93us
- * IBF to clear after sending LOAD_RT: 4467 4352 68us
+ * IBF to clear after sending LOAD_RT: 4467 4352 68us
* IBF to clear after sending two LOAD_RTs: 18974 18859 295us
* READ_T1, read status/data, IRQ, call handler: 35564 n/a 556us
* cmd to ~IBF READ_T1 2nd time right after: 5158403 n/a 81ms
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.