idx = kbd->idx4/4;
p = data[idx - 1];
- if ((p & ~HIL_CMDCT_POL) ==
- (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL)) goto report;
- if ((p & ~HIL_CMDCT_RPL) ==
- (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL)) goto report;
+ if ((p & ~HIL_CMDCT_POL) ==
+ (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))
+ goto report;
+ if ((p & ~HIL_CMDCT_RPL) ==
+ (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL))
+ goto report;
/* Not a poll response. See if we are loading config records. */
switch (p & HIL_PKT_DATA_MASK) {
for (; i < HIL_KBD_MAX_LENGTH; i++)
kbd->idd[i] = 0;
break;
+
case HIL_CMD_RSC:
for (i = 0; i < idx; i++)
kbd->rsc[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_KBD_MAX_LENGTH; i++)
kbd->rsc[i] = 0;
break;
+
case HIL_CMD_EXD:
for (i = 0; i < idx; i++)
kbd->exd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_KBD_MAX_LENGTH; i++)
kbd->exd[i] = 0;
break;
+
case HIL_CMD_RNM:
for (i = 0; i < idx; i++)
kbd->rnm[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_KBD_MAX_LENGTH + 1; i++)
kbd->rnm[i] = '\0';
break;
+
default:
/* These occur when device isn't present */
- if (p == (HIL_ERR_INT | HIL_PKT_CMD)) break;
+ if (p == (HIL_ERR_INT | HIL_PKT_CMD))
+ break;
/* Anything else we'd like to know about. */
printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p);
break;
switch (kbd->data[0] & HIL_POL_CHARTYPE_MASK) {
case HIL_POL_CHARTYPE_NONE:
break;
+
case HIL_POL_CHARTYPE_ASCII:
while (cnt < idx - 1)
input_report_key(dev, kbd->data[cnt++] & 0x7f, 1);
break;
+
case HIL_POL_CHARTYPE_RSVD1:
case HIL_POL_CHARTYPE_RSVD2:
case HIL_POL_CHARTYPE_BINARY:
while (cnt < idx - 1)
input_report_key(dev, kbd->data[cnt++], 1);
break;
+
case HIL_POL_CHARTYPE_SET1:
while (cnt < idx - 1) {
unsigned int key;
input_report_key(dev, key, !up);
}
break;
+
case HIL_POL_CHARTYPE_SET2:
while (cnt < idx - 1) {
unsigned int key;
input_report_key(dev, key, !up);
}
break;
+
case HIL_POL_CHARTYPE_SET3:
while (cnt < idx - 1) {
unsigned int key;
up(&kbd->sem);
}
-static void hil_kbd_process_err(struct hil_kbd *kbd) {
+static void hil_kbd_process_err(struct hil_kbd *kbd)
+{
printk(KERN_WARNING PREFIX "errored HIL packet\n");
kbd->idx4 = 0;
up(&kbd->sem);
}
-static irqreturn_t hil_kbd_interrupt(struct serio *serio,
- unsigned char data, unsigned int flags)
+static irqreturn_t hil_kbd_interrupt(struct serio *serio,
+ unsigned char data, unsigned int flags)
{
struct hil_kbd *kbd;
hil_packet packet;
int idx;
kbd = serio_get_drvdata(serio);
- if (kbd == NULL) {
- BUG();
- return IRQ_HANDLED;
- }
+ BUG_ON(kbd == NULL);
if (kbd->idx4 >= (HIL_KBD_MAX_LENGTH * sizeof(hil_packet))) {
hil_kbd_process_err(kbd);
return IRQ_HANDLED;
}
idx = kbd->idx4/4;
- if (!(kbd->idx4 % 4)) kbd->data[idx] = 0;
+ if (!(kbd->idx4 % 4))
+ kbd->data[idx] = 0;
packet = kbd->data[idx];
packet |= ((hil_packet)data) << ((3 - (kbd->idx4 % 4)) * 8);
kbd->data[idx] = packet;
/* Records of N 4-byte hil_packets must terminate with a command. */
- if ((++(kbd->idx4)) % 4) return IRQ_HANDLED;
+ if ((++(kbd->idx4)) % 4)
+ return IRQ_HANDLED;
if ((packet & 0xffff0000) != HIL_ERR_INT) {
hil_kbd_process_err(kbd);
return IRQ_HANDLED;
}
- if (packet & HIL_PKT_CMD) hil_kbd_process_record(kbd);
+ if (packet & HIL_PKT_CMD)
+ hil_kbd_process_record(kbd);
return IRQ_HANDLED;
}
struct hil_kbd *kbd;
kbd = serio_get_drvdata(serio);
- if (kbd == NULL) {
- BUG();
- return;
- }
+ BUG_ON(kbd == NULL);
serio_close(serio);
input_unregister_device(kbd->dev);
serio_set_drvdata(serio, kbd);
kbd->serio = serio;
- init_MUTEX_LOCKED(&(kbd->sem));
+ init_MUTEX_LOCKED(&kbd->sem);
/* Get device info. MLC driver supplies devid/status/etc. */
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_IDD);
- down(&(kbd->sem));
+ down(&kbd->sem);
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_RSC);
- down(&(kbd->sem));
+ down(&kbd->sem);
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_RNM);
- down(&(kbd->sem));
+ down(&kbd->sem);
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_EXD);
- down(&(kbd->sem));
+ down(&kbd->sem);
- up(&(kbd->sem));
+ up(&kbd->sem);
did = kbd->idd[0];
idd = kbd->idd + 1;
goto bail2;
}
- if(HIL_IDD_NUM_BUTTONS(idd) || HIL_IDD_NUM_AXES_PER_SET(*idd)) {
+ if (HIL_IDD_NUM_BUTTONS(idd) || HIL_IDD_NUM_AXES_PER_SET(*idd)) {
printk(KERN_INFO PREFIX "keyboards only, no combo devices supported.\n");
goto bail2;
}
-
kbd->dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
kbd->dev->ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
kbd->dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_EK1); /* Enable Keyswitch Autorepeat 1 */
- down(&(kbd->sem));
- up(&(kbd->sem));
+ down(&kbd->sem);
+ up(&kbd->sem);
return 0;
bail2:
},
.description = "HP HIL keyboard driver",
.id_table = hil_kbd_ids,
- .connect = hil_kbd_connect,
- .disconnect = hil_kbd_disconnect,
- .interrupt = hil_kbd_interrupt
+ .connect = hil_kbd_connect,
+ .disconnect = hil_kbd_disconnect,
+ .interrupt = hil_kbd_interrupt
};
static int __init hil_kbd_init(void)
{
return serio_register_driver(&hil_kbd_serio_drv);
}
-
+
static void __exit hil_kbd_exit(void)
{
serio_unregister_driver(&hil_kbd_serio_drv);
}
-
+
module_init(hil_kbd_init);
module_exit(hil_kbd_exit);
idx = ptr->idx4/4;
p = data[idx - 1];
- if ((p & ~HIL_CMDCT_POL) ==
- (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL)) goto report;
- if ((p & ~HIL_CMDCT_RPL) ==
- (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL)) goto report;
+ if ((p & ~HIL_CMDCT_POL) ==
+ (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))
+ goto report;
+ if ((p & ~HIL_CMDCT_RPL) ==
+ (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL))
+ goto report;
/* Not a poll response. See if we are loading config records. */
switch (p & HIL_PKT_DATA_MASK) {
for (; i < HIL_PTR_MAX_LENGTH; i++)
ptr->idd[i] = 0;
break;
+
case HIL_CMD_RSC:
for (i = 0; i < idx; i++)
ptr->rsc[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_PTR_MAX_LENGTH; i++)
ptr->rsc[i] = 0;
break;
+
case HIL_CMD_EXD:
for (i = 0; i < idx; i++)
ptr->exd[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_PTR_MAX_LENGTH; i++)
ptr->exd[i] = 0;
break;
+
case HIL_CMD_RNM:
for (i = 0; i < idx; i++)
ptr->rnm[i] = ptr->data[i] & HIL_PKT_DATA_MASK;
for (; i < HIL_PTR_MAX_LENGTH + 1; i++)
- ptr->rnm[i] = '\0';
+ ptr->rnm[i] = 0;
break;
+
default:
/* These occur when device isn't present */
- if (p == (HIL_ERR_INT | HIL_PKT_CMD)) break;
+ if (p == (HIL_ERR_INT | HIL_PKT_CMD))
+ break;
/* Anything else we'd like to know about. */
printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p);
break;
report:
if ((p & HIL_CMDCT_POL) != idx - 1) {
- printk(KERN_WARNING PREFIX "Malformed poll packet %x (idx = %i)\n", p, idx);
+ printk(KERN_WARNING PREFIX
+ "Malformed poll packet %x (idx = %i)\n", p, idx);
goto out;
}
laxis += i;
ax16 = ptr->idd[1] & HIL_IDD_HEADER_16BIT; /* 8 or 16bit resolution */
- absdev = ptr->idd[1] & HIL_IDD_HEADER_ABS;
+ absdev = ptr->idd[1] & HIL_IDD_HEADER_ABS;
for (cnt = 1; i < laxis; i++) {
unsigned int lo,hi,val;
input_report_abs(dev, ABS_X + i, val);
} else {
val = (int) (((int8_t)lo) | ((int8_t)hi<<8));
- if (i%3) val *= -1;
+ if (i%3)
+ val *= -1;
input_report_rel(dev, REL_X + i, val);
}
}
btn = ptr->data[cnt++];
up = btn & 1;
btn &= 0xfe;
- if (btn == 0x8e) {
+ if (btn == 0x8e)
continue; /* TODO: proximity == touch? */
- }
- else if ((btn > 0x8c) || (btn < 0x80)) continue;
+ else
+ if ((btn > 0x8c) || (btn < 0x80))
+ continue;
btn = (btn - 0x80) >> 1;
btn = ptr->btnmap[btn];
input_report_key(dev, btn, !up);
up(&ptr->sem);
}
-static void hil_ptr_process_err(struct hil_ptr *ptr) {
+static void hil_ptr_process_err(struct hil_ptr *ptr)
+{
printk(KERN_WARNING PREFIX "errored HIL packet\n");
ptr->idx4 = 0;
up(&ptr->sem);
- return;
}
-static irqreturn_t hil_ptr_interrupt(struct serio *serio,
+static irqreturn_t hil_ptr_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct hil_ptr *ptr;
int idx;
ptr = serio_get_drvdata(serio);
- if (ptr == NULL) {
- BUG();
- return IRQ_HANDLED;
- }
+ BUG_ON(ptr == NULL);
if (ptr->idx4 >= (HIL_PTR_MAX_LENGTH * sizeof(hil_packet))) {
hil_ptr_process_err(ptr);
return IRQ_HANDLED;
}
idx = ptr->idx4/4;
- if (!(ptr->idx4 % 4)) ptr->data[idx] = 0;
+ if (!(ptr->idx4 % 4))
+ ptr->data[idx] = 0;
packet = ptr->data[idx];
packet |= ((hil_packet)data) << ((3 - (ptr->idx4 % 4)) * 8);
ptr->data[idx] = packet;
/* Records of N 4-byte hil_packets must terminate with a command. */
- if ((++(ptr->idx4)) % 4) return IRQ_HANDLED;
+ if ((++(ptr->idx4)) % 4)
+ return IRQ_HANDLED;
if ((packet & 0xffff0000) != HIL_ERR_INT) {
hil_ptr_process_err(ptr);
return IRQ_HANDLED;
}
- if (packet & HIL_PKT_CMD)
+ if (packet & HIL_PKT_CMD)
hil_ptr_process_record(ptr);
+
return IRQ_HANDLED;
}
struct hil_ptr *ptr;
ptr = serio_get_drvdata(serio);
- if (ptr == NULL) {
- BUG();
- return;
- }
+ BUG_ON(ptr == NULL);
serio_close(serio);
input_unregister_device(ptr->dev);
static int hil_ptr_connect(struct serio *serio, struct serio_driver *driver)
{
struct hil_ptr *ptr;
- char *txt;
+ const char *txt;
unsigned int i, naxsets, btntype;
uint8_t did, *idd;
serio_set_drvdata(serio, ptr);
ptr->serio = serio;
- init_MUTEX_LOCKED(&(ptr->sem));
+ init_MUTEX_LOCKED(&ptr->sem);
/* Get device info. MLC driver supplies devid/status/etc. */
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_IDD);
- down(&(ptr->sem));
+ down(&ptr->sem);
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_RSC);
- down(&(ptr->sem));
+ down(&ptr->sem);
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_RNM);
- down(&(ptr->sem));
+ down(&ptr->sem);
serio->write(serio, 0);
serio->write(serio, 0);
serio->write(serio, HIL_PKT_CMD >> 8);
serio->write(serio, HIL_CMD_EXD);
- down(&(ptr->sem));
+ down(&ptr->sem);
- up(&(ptr->sem));
+ up(&ptr->sem);
did = ptr->idd[0];
idd = ptr->idd + 1;
ptr->dev->evbit[0] = BIT(EV_ABS);
txt = "absolute";
}
- if (!ptr->dev->evbit[0]) {
+ if (!ptr->dev->evbit[0])
goto bail2;
- }
ptr->nbtn = HIL_IDD_NUM_BUTTONS(idd);
- if (ptr->nbtn) ptr->dev->evbit[0] |= BIT(EV_KEY);
+ if (ptr->nbtn)
+ ptr->dev->evbit[0] |= BIT(EV_KEY);
naxsets = HIL_IDD_NUM_AXSETS(*idd);
ptr->naxes = HIL_IDD_NUM_AXES_PER_SET(*idd);
did, txt);
printk(KERN_INFO PREFIX "HIL pointer has %i buttons and %i sets of %i axes\n",
ptr->nbtn, naxsets, ptr->naxes);
-
+
btntype = BTN_MISC;
if ((did & HIL_IDD_DID_ABS_TABLET_MASK) == HIL_IDD_DID_ABS_TABLET)
#ifdef TABLET_SIMULATES_MOUSE
#endif
if ((did & HIL_IDD_DID_ABS_TSCREEN_MASK) == HIL_IDD_DID_ABS_TSCREEN)
btntype = BTN_TOUCH;
-
+
if ((did & HIL_IDD_DID_REL_MOUSE_MASK) == HIL_IDD_DID_REL_MOUSE)
btntype = BTN_MOUSE;
}
if ((did & HIL_IDD_DID_TYPE_MASK) == HIL_IDD_DID_TYPE_REL) {
- for (i = 0; i < ptr->naxes; i++) {
+ for (i = 0; i < ptr->naxes; i++)
set_bit(REL_X + i, ptr->dev->relbit);
- }
- for (i = 3; (i < ptr->naxes + 3) && (naxsets > 1); i++) {
+ for (i = 3; (i < ptr->naxes + 3) && (naxsets > 1); i++)
set_bit(REL_X + i, ptr->dev->relbit);
- }
} else {
for (i = 0; i < ptr->naxes; i++) {
set_bit(ABS_X + i, ptr->dev->absbit);
{
return serio_register_driver(&hil_ptr_serio_driver);
}
-
+
static void __exit hil_ptr_exit(void)
{
serio_unregister_driver(&hil_ptr_serio_driver);
}
-
+
module_init(hil_ptr_init);
module_exit(hil_ptr_exit);
*
* Driver theory of operation:
*
- * Some access methods and an ISR is defined by the sub-driver
- * (e.g. hp_sdc_mlc.c). These methods are expected to provide a
- * few bits of logic in addition to raw access to the HIL MLC,
- * specifically, the ISR, which is entirely registered by the
- * sub-driver and invoked directly, must check for record
+ * Some access methods and an ISR is defined by the sub-driver
+ * (e.g. hp_sdc_mlc.c). These methods are expected to provide a
+ * few bits of logic in addition to raw access to the HIL MLC,
+ * specifically, the ISR, which is entirely registered by the
+ * sub-driver and invoked directly, must check for record
* termination or packet match, at which point a semaphore must
* be cleared and then the hil_mlcs_tasklet must be scheduled.
*
* itself if output is pending. (This rescheduling should be replaced
* at some point with a sub-driver-specific mechanism.)
*
- * A timer task prods the tasklet once per second to prevent
+ * A timer task prods the tasklet once per second to prevent
* hangups when attached devices do not return expected data
* and to initiate probes of the loop for new devices.
*/
/********************** Device info/instance management **********************/
-static void hil_mlc_clear_di_map (hil_mlc *mlc, int val) {
+static void hil_mlc_clear_di_map(hil_mlc *mlc, int val)
+{
int j;
- for (j = val; j < 7 ; j++) {
+
+ for (j = val; j < 7 ; j++)
mlc->di_map[j] = -1;
- }
}
-static void hil_mlc_clear_di_scratch (hil_mlc *mlc) {
- memset(&(mlc->di_scratch), 0, sizeof(mlc->di_scratch));
+static void hil_mlc_clear_di_scratch(hil_mlc *mlc)
+{
+ memset(&mlc->di_scratch, 0, sizeof(mlc->di_scratch));
}
-static void hil_mlc_copy_di_scratch (hil_mlc *mlc, int idx) {
- memcpy(&(mlc->di[idx]), &(mlc->di_scratch), sizeof(mlc->di_scratch));
+static void hil_mlc_copy_di_scratch(hil_mlc *mlc, int idx)
+{
+ memcpy(&mlc->di[idx], &mlc->di_scratch, sizeof(mlc->di_scratch));
}
-static int hil_mlc_match_di_scratch (hil_mlc *mlc) {
+static int hil_mlc_match_di_scratch(hil_mlc *mlc)
+{
int idx;
for (idx = 0; idx < HIL_MLC_DEVMEM; idx++) {
- int j, found;
+ int j, found = 0;
/* In-use slots are not eligible. */
- found = 0;
- for (j = 0; j < 7 ; j++) {
- if (mlc->di_map[j] == idx) found++;
- }
- if (found) continue;
- if (!memcmp(mlc->di + idx,
- &(mlc->di_scratch),
- sizeof(mlc->di_scratch))) break;
+ for (j = 0; j < 7 ; j++)
+ if (mlc->di_map[j] == idx)
+ found++;
+
+ if (found)
+ continue;
+
+ if (!memcmp(mlc->di + idx, &mlc->di_scratch,
+ sizeof(mlc->di_scratch)))
+ break;
}
- return((idx >= HIL_MLC_DEVMEM) ? -1 : idx);
+ return idx >= HIL_MLC_DEVMEM ? -1 : idx;
}
-static int hil_mlc_find_free_di(hil_mlc *mlc) {
+static int hil_mlc_find_free_di(hil_mlc *mlc)
+{
int idx;
- /* TODO: Pick all-zero slots first, failing that,
- * randomize the slot picked among those eligible.
+
+ /* TODO: Pick all-zero slots first, failing that,
+ * randomize the slot picked among those eligible.
*/
for (idx = 0; idx < HIL_MLC_DEVMEM; idx++) {
- int j, found;
- found = 0;
- for (j = 0; j < 7 ; j++) {
- if (mlc->di_map[j] == idx) found++;
- }
- if (!found) break;
+ int j, found = 0;
+
+ for (j = 0; j < 7 ; j++)
+ if (mlc->di_map[j] == idx)
+ found++;
+
+ if (!found)
+ break;
}
- return(idx); /* Note: It is guaranteed at least one above will match */
+
+ return idx; /* Note: It is guaranteed at least one above will match */
}
-static inline void hil_mlc_clean_serio_map(hil_mlc *mlc) {
+static inline void hil_mlc_clean_serio_map(hil_mlc *mlc)
+{
int idx;
+
for (idx = 0; idx < HIL_MLC_DEVMEM; idx++) {
- int j, found;
- found = 0;
- for (j = 0; j < 7 ; j++) {
- if (mlc->di_map[j] == idx) found++;
- }
- if (!found) mlc->serio_map[idx].di_revmap = -1;
+ int j, found = 0;
+
+ for (j = 0; j < 7 ; j++)
+ if (mlc->di_map[j] == idx)
+ found++;
+
+ if (!found)
+ mlc->serio_map[idx].di_revmap = -1;
}
}
-static void hil_mlc_send_polls(hil_mlc *mlc) {
+static void hil_mlc_send_polls(hil_mlc *mlc)
+{
int did, i, cnt;
struct serio *serio;
struct serio_driver *drv;
while (mlc->icount < 15 - i) {
hil_packet p;
+
p = mlc->ipacket[i];
if (did != (p & HIL_PKT_ADDR_MASK) >> 8) {
- if (drv == NULL || drv->interrupt == NULL) goto skip;
+ if (drv && drv->interrupt) {
+ drv->interrupt(serio, 0, 0);
+ drv->interrupt(serio, HIL_ERR_INT >> 16, 0);
+ drv->interrupt(serio, HIL_PKT_CMD >> 8, 0);
+ drv->interrupt(serio, HIL_CMD_POL + cnt, 0);
+ }
- drv->interrupt(serio, 0, 0);
- drv->interrupt(serio, HIL_ERR_INT >> 16, 0);
- drv->interrupt(serio, HIL_PKT_CMD >> 8, 0);
- drv->interrupt(serio, HIL_CMD_POL + cnt, 0);
- skip:
did = (p & HIL_PKT_ADDR_MASK) >> 8;
serio = did ? mlc->serio[mlc->di_map[did-1]] : NULL;
drv = (serio != NULL) ? serio->drv : NULL;
cnt = 0;
}
- cnt++; i++;
- if (drv == NULL || drv->interrupt == NULL) continue;
- drv->interrupt(serio, (p >> 24), 0);
- drv->interrupt(serio, (p >> 16) & 0xff, 0);
- drv->interrupt(serio, (p >> 8) & ~HIL_PKT_ADDR_MASK, 0);
- drv->interrupt(serio, p & 0xff, 0);
+
+ cnt++;
+ i++;
+
+ if (drv && drv->interrupt) {
+ drv->interrupt(serio, (p >> 24), 0);
+ drv->interrupt(serio, (p >> 16) & 0xff, 0);
+ drv->interrupt(serio, (p >> 8) & ~HIL_PKT_ADDR_MASK, 0);
+ drv->interrupt(serio, p & 0xff, 0);
+ }
}
}
#define HILSEN_DOZE (HILSEN_SAME | HILSEN_SCHED | HILSEN_BREAK)
#define HILSEN_SLEEP (HILSEN_SAME | HILSEN_BREAK)
-static int hilse_match(hil_mlc *mlc, int unused) {
+static int hilse_match(hil_mlc *mlc, int unused)
+{
int rc;
+
rc = hil_mlc_match_di_scratch(mlc);
if (rc == -1) {
rc = hil_mlc_find_free_di(mlc);
- if (rc == -1) goto err;
+ if (rc == -1)
+ goto err;
+
#ifdef HIL_MLC_DEBUG
printk(KERN_DEBUG PREFIX "new in slot %i\n", rc);
#endif
serio_rescan(mlc->serio[rc]);
return -1;
}
+
mlc->di_map[mlc->ddi] = rc;
#ifdef HIL_MLC_DEBUG
printk(KERN_DEBUG PREFIX "same in slot %i\n", rc);
mlc->serio_map[rc].di_revmap = mlc->ddi;
hil_mlc_clean_serio_map(mlc);
return 0;
+
err:
printk(KERN_ERR PREFIX "Residual device slots exhausted, close some serios!\n");
return 1;
}
/* An LCV used to prevent runaway loops, forces 5 second sleep when reset. */
-static int hilse_init_lcv(hil_mlc *mlc, int unused) {
+static int hilse_init_lcv(hil_mlc *mlc, int unused)
+{
struct timeval tv;
do_gettimeofday(&tv);
- if(mlc->lcv == 0) goto restart; /* First init, no need to dally */
- if(tv.tv_sec - mlc->lcv_tv.tv_sec < 5) return -1;
- restart:
+ if (mlc->lcv && (tv.tv_sec - mlc->lcv_tv.tv_sec) < 5)
+ return -1;
+
mlc->lcv_tv = tv;
mlc->lcv = 0;
+
return 0;
}
-static int hilse_inc_lcv(hil_mlc *mlc, int lim) {
- if (mlc->lcv++ >= lim) return -1;
- return 0;
+static int hilse_inc_lcv(hil_mlc *mlc, int lim)
+{
+ return mlc->lcv++ >= lim ? -1 : 0;
}
#if 0
-static int hilse_set_lcv(hil_mlc *mlc, int val) {
+static int hilse_set_lcv(hil_mlc *mlc, int val)
+{
mlc->lcv = val;
+
return 0;
}
#endif
/* Management of the discovered device index (zero based, -1 means no devs) */
-static int hilse_set_ddi(hil_mlc *mlc, int val) {
+static int hilse_set_ddi(hil_mlc *mlc, int val)
+{
mlc->ddi = val;
hil_mlc_clear_di_map(mlc, val + 1);
+
return 0;
}
-static int hilse_dec_ddi(hil_mlc *mlc, int unused) {
+static int hilse_dec_ddi(hil_mlc *mlc, int unused)
+{
mlc->ddi--;
- if (mlc->ddi <= -1) {
+ if (mlc->ddi <= -1) {
mlc->ddi = -1;
hil_mlc_clear_di_map(mlc, 0);
return -1;
}
hil_mlc_clear_di_map(mlc, mlc->ddi + 1);
+
return 0;
}
-static int hilse_inc_ddi(hil_mlc *mlc, int unused) {
- if (mlc->ddi >= 6) {
- BUG();
- return -1;
- }
+static int hilse_inc_ddi(hil_mlc *mlc, int unused)
+{
+ BUG_ON(mlc->ddi >= 6);
mlc->ddi++;
+
return 0;
}
-static int hilse_take_idd(hil_mlc *mlc, int unused) {
+static int hilse_take_idd(hil_mlc *mlc, int unused)
+{
int i;
- /* Help the state engine:
- * Is this a real IDD response or just an echo?
+ /* Help the state engine:
+ * Is this a real IDD response or just an echo?
*
- * Real IDD response does not start with a command.
+ * Real IDD response does not start with a command.
*/
- if (mlc->ipacket[0] & HIL_PKT_CMD) goto bail;
+ if (mlc->ipacket[0] & HIL_PKT_CMD)
+ goto bail;
+
/* Should have the command echoed further down. */
for (i = 1; i < 16; i++) {
- if (((mlc->ipacket[i] & HIL_PKT_ADDR_MASK) ==
+ if (((mlc->ipacket[i] & HIL_PKT_ADDR_MASK) ==
(mlc->ipacket[0] & HIL_PKT_ADDR_MASK)) &&
- (mlc->ipacket[i] & HIL_PKT_CMD) &&
+ (mlc->ipacket[i] & HIL_PKT_CMD) &&
((mlc->ipacket[i] & HIL_PKT_DATA_MASK) == HIL_CMD_IDD))
break;
}
- if (i > 15) goto bail;
+ if (i > 15)
+ goto bail;
+
/* And the rest of the packets should still be clear. */
- while (++i < 16) {
- if (mlc->ipacket[i]) break;
- }
- if (i < 16) goto bail;
- for (i = 0; i < 16; i++) {
- mlc->di_scratch.idd[i] =
+ while (++i < 16)
+ if (mlc->ipacket[i])
+ break;
+
+ if (i < 16)
+ goto bail;
+
+ for (i = 0; i < 16; i++)
+ mlc->di_scratch.idd[i] =
mlc->ipacket[i] & HIL_PKT_DATA_MASK;
- }
+
/* Next step is to see if RSC supported */
- if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_RSC)
+ if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_RSC)
return HILSEN_NEXT;
- if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_EXD)
+
+ if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_EXD)
return HILSEN_DOWN | 4;
+
return 0;
+
bail:
mlc->ddi--;
+
return -1; /* This should send us off to ACF */
}
-static int hilse_take_rsc(hil_mlc *mlc, int unused) {
+static int hilse_take_rsc(hil_mlc *mlc, int unused)
+{
int i;
- for (i = 0; i < 16; i++) {
- mlc->di_scratch.rsc[i] =
+ for (i = 0; i < 16; i++)
+ mlc->di_scratch.rsc[i] =
mlc->ipacket[i] & HIL_PKT_DATA_MASK;
- }
+
/* Next step is to see if EXD supported (IDD has already been read) */
- if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_EXD)
+ if (mlc->di_scratch.idd[1] & HIL_IDD_HEADER_EXD)
return HILSEN_NEXT;
+
return 0;
}
-static int hilse_take_exd(hil_mlc *mlc, int unused) {
+static int hilse_take_exd(hil_mlc *mlc, int unused)
+{
int i;
- for (i = 0; i < 16; i++) {
- mlc->di_scratch.exd[i] =
+ for (i = 0; i < 16; i++)
+ mlc->di_scratch.exd[i] =
mlc->ipacket[i] & HIL_PKT_DATA_MASK;
- }
+
/* Next step is to see if RNM supported. */
- if (mlc->di_scratch.exd[0] & HIL_EXD_HEADER_RNM)
+ if (mlc->di_scratch.exd[0] & HIL_EXD_HEADER_RNM)
return HILSEN_NEXT;
+
return 0;
}
-static int hilse_take_rnm(hil_mlc *mlc, int unused) {
+static int hilse_take_rnm(hil_mlc *mlc, int unused)
+{
int i;
- for (i = 0; i < 16; i++) {
- mlc->di_scratch.rnm[i] =
+ for (i = 0; i < 16; i++)
+ mlc->di_scratch.rnm[i] =
mlc->ipacket[i] & HIL_PKT_DATA_MASK;
- }
- do {
- char nam[17];
- snprintf(nam, 16, "%s", mlc->di_scratch.rnm);
- nam[16] = '\0';
- printk(KERN_INFO PREFIX "Device name gotten: %s\n", nam);
- } while (0);
+
+ printk(KERN_INFO PREFIX "Device name gotten: %16s\n",
+ mlc->di_scratch.rnm);
+
return 0;
}
-static int hilse_operate(hil_mlc *mlc, int repoll) {
+static int hilse_operate(hil_mlc *mlc, int repoll)
+{
- if (mlc->opercnt == 0) hil_mlcs_probe = 0;
+ if (mlc->opercnt == 0)
+ hil_mlcs_probe = 0;
mlc->opercnt = 1;
hil_mlc_send_polls(mlc);
- if (!hil_mlcs_probe) return 0;
+ if (!hil_mlcs_probe)
+ return 0;
hil_mlcs_probe = 0;
mlc->opercnt = 0;
return 1;
EXPECT(HIL_ERR_INT | TEST_PACKET(0xa),
2000, HILSEN_NEXT, HILSEN_RESTART, HILSEN_RESTART)
OUT(HIL_CTRL_ONLY | 0) /* Disable test mode */
-
+
/* 9 HILSEN_DHR */
FUNC(hilse_init_lcv, 0, HILSEN_NEXT, HILSEN_SLEEP, 0)
IN(300000, HILSEN_DHR2, HILSEN_DHR2, HILSEN_NEXT)
/* 14 HILSEN_IFC */
- OUT(HIL_PKT_CMD | HIL_CMD_IFC)
+ OUT(HIL_PKT_CMD | HIL_CMD_IFC)
EXPECT(HIL_PKT_CMD | HIL_CMD_IFC | HIL_ERR_INT,
20000, HILSEN_DISC, HILSEN_DHR2, HILSEN_NEXT )
/* 18 HILSEN_HEAL */
OUT_LAST(HIL_CMD_ELB)
- EXPECT_LAST(HIL_CMD_ELB | HIL_ERR_INT,
+ EXPECT_LAST(HIL_CMD_ELB | HIL_ERR_INT,
20000, HILSEN_REPOLL, HILSEN_DSR, HILSEN_NEXT)
FUNC(hilse_dec_ddi, 0, HILSEN_HEAL, HILSEN_NEXT, 0)
/* 44 HILSEN_PROBE */
OUT_LAST(HIL_PKT_CMD | HIL_CMD_EPT)
- IN(10000, HILSEN_DISC, HILSEN_DSR, HILSEN_NEXT)
+ IN(10000, HILSEN_DISC, HILSEN_DSR, HILSEN_NEXT)
OUT_DISC(HIL_PKT_CMD | HIL_CMD_ELB)
IN(10000, HILSEN_DISC, HILSEN_DSR, HILSEN_NEXT)
OUT(HIL_PKT_CMD | HIL_CMD_ACF | 1)
/* 52 HILSEN_DSR */
FUNC(hilse_set_ddi, -1, HILSEN_NEXT, 0, 0)
OUT(HIL_PKT_CMD | HIL_CMD_DSR)
- IN(20000, HILSEN_DHR, HILSEN_DHR, HILSEN_IFC)
+ IN(20000, HILSEN_DHR, HILSEN_DHR, HILSEN_IFC)
/* 55 HILSEN_REPOLL */
OUT(HIL_PKT_CMD | HIL_CMD_RPL)
FUNC(hilse_operate, 1, HILSEN_OPERATE, HILSEN_IFC, HILSEN_PROBE)
/* 58 HILSEN_IFCACF */
- OUT(HIL_PKT_CMD | HIL_CMD_IFC)
+ OUT(HIL_PKT_CMD | HIL_CMD_IFC)
EXPECT(HIL_PKT_CMD | HIL_CMD_IFC | HIL_ERR_INT,
20000, HILSEN_ACF2, HILSEN_DHR2, HILSEN_HEAL)
/* 60 HILSEN_END */
};
-static inline void hilse_setup_input(hil_mlc *mlc, const struct hilse_node *node) {
+static inline void hilse_setup_input(hil_mlc *mlc, const struct hilse_node *node)
+{
switch (node->act) {
case HILSE_EXPECT_DISC:
do_gettimeofday(&(mlc->instart));
mlc->icount = 15;
memset(mlc->ipacket, 0, 16 * sizeof(hil_packet));
- BUG_ON(down_trylock(&(mlc->isem)));
-
- return;
+ BUG_ON(down_trylock(&mlc->isem));
}
#ifdef HIL_MLC_DEBUG
-static int doze = 0;
+static int doze;
static int seidx; /* For debug */
#endif
-static int hilse_donode (hil_mlc *mlc) {
+static int hilse_donode(hil_mlc *mlc)
+{
const struct hilse_node *node;
int nextidx = 0;
int sched_long = 0;
unsigned long flags;
#ifdef HIL_MLC_DEBUG
- if (mlc->seidx && (mlc->seidx != seidx) && mlc->seidx != 41 && mlc->seidx != 42 && mlc->seidx != 43) {
- printk(KERN_DEBUG PREFIX "z%i \n {%i}", doze, mlc->seidx);
+ if (mlc->seidx && mlc->seidx != seidx &&
+ mlc->seidx != 41 && mlc->seidx != 42 && mlc->seidx != 43) {
+ printk(KERN_DEBUG PREFIX "z%i \n {%i}", doze, mlc->seidx);
doze = 0;
}
case HILSE_FUNC:
BUG_ON(node->object.func == NULL);
rc = node->object.func(mlc, node->arg);
- nextidx = (rc > 0) ? node->ugly :
+ nextidx = (rc > 0) ? node->ugly :
((rc < 0) ? node->bad : node->good);
- if (nextidx == HILSEN_FOLLOW) nextidx = rc;
+ if (nextidx == HILSEN_FOLLOW)
+ nextidx = rc;
break;
+
case HILSE_EXPECT_LAST:
case HILSE_EXPECT_DISC:
case HILSE_EXPECT:
case HILSE_IN:
/* Already set up from previous HILSE_OUT_* */
- write_lock_irqsave(&(mlc->lock), flags);
+ write_lock_irqsave(&mlc->lock, flags);
rc = mlc->in(mlc, node->arg);
if (rc == 2) {
nextidx = HILSEN_DOZE;
sched_long = 1;
- write_unlock_irqrestore(&(mlc->lock), flags);
+ write_unlock_irqrestore(&mlc->lock, flags);
break;
}
- if (rc == 1) nextidx = node->ugly;
- else if (rc == 0) nextidx = node->good;
- else nextidx = node->bad;
+ if (rc == 1)
+ nextidx = node->ugly;
+ else if (rc == 0)
+ nextidx = node->good;
+ else
+ nextidx = node->bad;
mlc->istarted = 0;
- write_unlock_irqrestore(&(mlc->lock), flags);
+ write_unlock_irqrestore(&mlc->lock, flags);
break;
+
case HILSE_OUT_LAST:
- write_lock_irqsave(&(mlc->lock), flags);
+ write_lock_irqsave(&mlc->lock, flags);
pack = node->object.packet;
pack |= ((mlc->ddi + 1) << HIL_PKT_ADDR_SHIFT);
goto out;
+
case HILSE_OUT_DISC:
- write_lock_irqsave(&(mlc->lock), flags);
+ write_lock_irqsave(&mlc->lock, flags);
pack = node->object.packet;
pack |= ((mlc->ddi + 2) << HIL_PKT_ADDR_SHIFT);
goto out;
+
case HILSE_OUT:
- write_lock_irqsave(&(mlc->lock), flags);
+ write_lock_irqsave(&mlc->lock, flags);
pack = node->object.packet;
out:
- if (mlc->istarted) goto out2;
+ if (mlc->istarted)
+ goto out2;
/* Prepare to receive input */
if ((node + 1)->act & HILSE_IN)
hilse_setup_input(mlc, node + 1);
out2:
- write_unlock_irqrestore(&(mlc->lock), flags);
+ write_unlock_irqrestore(&mlc->lock, flags);
if (down_trylock(&mlc->osem)) {
nextidx = HILSEN_DOZE;
}
up(&mlc->osem);
- write_lock_irqsave(&(mlc->lock), flags);
- if (!(mlc->ostarted)) {
+ write_lock_irqsave(&mlc->lock, flags);
+ if (!mlc->ostarted) {
mlc->ostarted = 1;
mlc->opacket = pack;
mlc->out(mlc);
nextidx = HILSEN_DOZE;
- write_unlock_irqrestore(&(mlc->lock), flags);
+ write_unlock_irqrestore(&mlc->lock, flags);
break;
}
mlc->ostarted = 0;
do_gettimeofday(&(mlc->instart));
- write_unlock_irqrestore(&(mlc->lock), flags);
+ write_unlock_irqrestore(&mlc->lock, flags);
nextidx = HILSEN_NEXT;
break;
+
case HILSE_CTS:
nextidx = mlc->cts(mlc) ? node->bad : node->good;
break;
+
default:
BUG();
- nextidx = 0;
- break;
}
#ifdef HIL_MLC_DEBUG
- if (nextidx == HILSEN_DOZE) doze++;
+ if (nextidx == HILSEN_DOZE)
+ doze++;
#endif
while (nextidx & HILSEN_SCHED) {
struct timeval tv;
- if (!sched_long) goto sched;
+ if (!sched_long)
+ goto sched;
do_gettimeofday(&tv);
tv.tv_usec += USEC_PER_SEC * (tv.tv_sec - mlc->instart.tv_sec);
sched:
tasklet_schedule(&hil_mlcs_tasklet);
break;
- }
- if (nextidx & HILSEN_DOWN) mlc->seidx += nextidx & HILSEN_MASK;
- else if (nextidx & HILSEN_UP) mlc->seidx -= nextidx & HILSEN_MASK;
- else mlc->seidx = nextidx & HILSEN_MASK;
+ }
+
+ if (nextidx & HILSEN_DOWN)
+ mlc->seidx += nextidx & HILSEN_MASK;
+ else if (nextidx & HILSEN_UP)
+ mlc->seidx -= nextidx & HILSEN_MASK;
+ else
+ mlc->seidx = nextidx & HILSEN_MASK;
+
+ if (nextidx & HILSEN_BREAK)
+ return 1;
- if (nextidx & HILSEN_BREAK) return 1;
return 0;
}
/******************** tasklet context functions **************************/
-static void hil_mlcs_process(unsigned long unused) {
+static void hil_mlcs_process(unsigned long unused)
+{
struct list_head *tmp;
read_lock(&hil_mlcs_lock);
struct hil_mlc *mlc = list_entry(tmp, hil_mlc, list);
while (hilse_donode(mlc) == 0) {
#ifdef HIL_MLC_DEBUG
- if (mlc->seidx != 41 &&
- mlc->seidx != 42 &&
- mlc->seidx != 43)
- printk(KERN_DEBUG PREFIX " + ");
+ if (mlc->seidx != 41 &&
+ mlc->seidx != 42 &&
+ mlc->seidx != 43)
+ printk(KERN_DEBUG PREFIX " + ");
#endif
- };
+ }
}
read_unlock(&hil_mlcs_lock);
}
/************************* Keepalive timer task *********************/
-void hil_mlcs_timer (unsigned long data) {
+void hil_mlcs_timer(unsigned long data)
+{
hil_mlcs_probe = 1;
tasklet_schedule(&hil_mlcs_tasklet);
/* Re-insert the periodic task. */
/******************** user/kernel context functions **********************/
-static int hil_mlc_serio_write(struct serio *serio, unsigned char c) {
+static int hil_mlc_serio_write(struct serio *serio, unsigned char c)
+{
struct hil_mlc_serio_map *map;
struct hil_mlc *mlc;
struct serio_driver *drv;
uint8_t *idx, *last;
map = serio->port_data;
- if (map == NULL) {
- BUG();
- return -EIO;
- }
+ BUG_ON(map == NULL);
+
mlc = map->mlc;
- if (mlc == NULL) {
- BUG();
- return -EIO;
- }
- mlc->serio_opacket[map->didx] |=
+ BUG_ON(mlc == NULL);
+
+ mlc->serio_opacket[map->didx] |=
((hil_packet)c) << (8 * (3 - mlc->serio_oidx[map->didx]));
if (mlc->serio_oidx[map->didx] >= 3) {
/* for now only commands */
- if (!(mlc->serio_opacket[map->didx] & HIL_PKT_CMD))
+ if (!(mlc->serio_opacket[map->didx] & HIL_PKT_CMD))
return -EIO;
switch (mlc->serio_opacket[map->didx] & HIL_PKT_DATA_MASK) {
case HIL_CMD_IDD:
return -EIO;
emu:
drv = serio->drv;
- if (drv == NULL) {
- BUG();
- return -EIO;
- }
+ BUG_ON(drv == NULL);
+
last = idx + 15;
- while ((last != idx) && (*last == 0)) last--;
+ while ((last != idx) && (*last == 0))
+ last--;
while (idx != last) {
drv->interrupt(serio, 0, 0);
drv->interrupt(serio, HIL_ERR_INT >> 16, 0);
drv->interrupt(serio, HIL_PKT_CMD >> 8, 0);
drv->interrupt(serio, *idx, 0);
-
+
mlc->serio_oidx[map->didx] = 0;
mlc->serio_opacket[map->didx] = 0;
return 0;
}
-static int hil_mlc_serio_open(struct serio *serio) {
+static int hil_mlc_serio_open(struct serio *serio)
+{
struct hil_mlc_serio_map *map;
struct hil_mlc *mlc;
return -EBUSY;
map = serio->port_data;
- if (map == NULL) {
- BUG();
- return -ENODEV;
- }
+ BUG_ON(map == NULL);
+
mlc = map->mlc;
- if (mlc == NULL) {
- BUG();
- return -ENODEV;
- }
+ BUG_ON(mlc == NULL);
return 0;
}
-static void hil_mlc_serio_close(struct serio *serio) {
+static void hil_mlc_serio_close(struct serio *serio)
+{
struct hil_mlc_serio_map *map;
struct hil_mlc *mlc;
map = serio->port_data;
- if (map == NULL) {
- BUG();
- return;
- }
+ BUG_ON(map == NULL);
+
mlc = map->mlc;
- if (mlc == NULL) {
- BUG();
- return;
- }
+ BUG_ON(mlc == NULL);
serio_set_drvdata(serio, NULL);
serio->drv = NULL;
.id = SERIO_ANY,
};
-int hil_mlc_register(hil_mlc *mlc) {
+int hil_mlc_register(hil_mlc *mlc)
+{
int i;
- unsigned long flags;
+ unsigned long flags;
- if (mlc == NULL) {
- return -EINVAL;
- }
+ BUG_ON(mlc == NULL);
mlc->istarted = 0;
- mlc->ostarted = 0;
+ mlc->ostarted = 0;
- rwlock_init(&mlc->lock);
- init_MUTEX(&(mlc->osem));
+ rwlock_init(&mlc->lock);
+ init_MUTEX(&mlc->osem);
- init_MUTEX(&(mlc->isem));
- mlc->icount = -1;
- mlc->imatch = 0;
+ init_MUTEX(&mlc->isem);
+ mlc->icount = -1;
+ mlc->imatch = 0;
mlc->opercnt = 0;
- init_MUTEX_LOCKED(&(mlc->csem));
+ init_MUTEX_LOCKED(&(mlc->csem));
hil_mlc_clear_di_scratch(mlc);
hil_mlc_clear_di_map(mlc, 0);
return 0;
}
-int hil_mlc_unregister(hil_mlc *mlc) {
+int hil_mlc_unregister(hil_mlc *mlc)
+{
struct list_head *tmp;
- unsigned long flags;
+ unsigned long flags;
int i;
- if (mlc == NULL)
- return -EINVAL;
+ BUG_ON(mlc == NULL);
write_lock_irqsave(&hil_mlcs_lock, flags);
- list_for_each(tmp, &hil_mlcs) {
+ list_for_each(tmp, &hil_mlcs)
if (list_entry(tmp, hil_mlc, list) == mlc)
goto found;
- }
/* not found in list */
write_unlock_irqrestore(&hil_mlcs_lock, flags);
found:
list_del(tmp);
- write_unlock_irqrestore(&hil_mlcs_lock, flags);
+ write_unlock_irqrestore(&hil_mlcs_lock, flags);
for (i = 0; i < HIL_MLC_DEVMEM; i++) {
serio_unregister_port(mlc->serio[i]);
return 0;
}
-
+
static void __exit hil_mlc_exit(void)
{
del_timer(&hil_mlcs_kicker);
tasklet_disable(&hil_mlcs_tasklet);
tasklet_kill(&hil_mlcs_tasklet);
}
-
+
module_init(hil_mlc_init);
module_exit(hil_mlc_exit);
*
* 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
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);
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;
}
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];
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();
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;
}
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;
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;
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) {
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;
goto finish;
}
- if (hp_sdc.wcurr == -1) goto done;
+ if (hp_sdc.wcurr == -1)
+ goto done;
curr = hp_sdc.tq[curridx];
idx = curr->actidx;
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) {
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) {
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];
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;
{
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;
if (act & HP_SDC_ACT_POSTCMD) {
- uint8_t postcmd;
+ uint8_t postcmd;
/* curr->idx should == idx at this point. */
postcmd = curr->seq[idx];
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;
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) {
+int hp_sdc_enqueue_transaction(hp_sdc_transaction *this)
+{
unsigned long flags;
int i;
if (this == NULL) {
tasklet_schedule(&hp_sdc.task);
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;
return -EINVAL;
}
-int hp_sdc_dequeue_transaction(hp_sdc_transaction *this) {
+int hp_sdc_dequeue_transaction(hp_sdc_transaction *this)
+{
unsigned long flags;
int i;
/* 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;
/********************** 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);
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);
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);
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)) {
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)) {
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)) {
/************************* 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);
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, }
};
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;
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;
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, IRQF_SHARED|IRQF_SAMPLE_RANDOM,
- "HP SDC", &hp_sdc)) goto err1;
+ "HP SDC", &hp_sdc))
+ goto err1;
errstr = "NMI not available for";
if (request_irq(hp_sdc.nmi, &hp_sdc_nmisr, IRQF_SHARED,
- "HP SDC NMI", &hp_sdc)) goto err2;
+ "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();
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;
}
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;
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
}
mm_segment_t fs;
unsigned char i;
#endif
-
+
hp_sdc.dev = NULL;
hp_sdc.dev_err = 0;
#if defined(__hppa__)
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;
}
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) {
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;
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;
}
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
} hp_sdc_mlc_priv;
/************************* Interrupt context ******************************/
-static void hp_sdc_mlc_isr (int irq, void *dev_id,
- uint8_t status, uint8_t data) {
- int idx;
+static void hp_sdc_mlc_isr (int irq, void *dev_id,
+ uint8_t status, uint8_t data)
+{
+ int idx;
hil_mlc *mlc = &hp_sdc_mlc;
- write_lock(&(mlc->lock));
+ write_lock(&mlc->lock);
if (mlc->icount < 0) {
printk(KERN_WARNING PREFIX "HIL Overflow!\n");
up(&mlc->isem);
if ((status & HP_SDC_STATUS_IRQMASK) == HP_SDC_STATUS_HILDATA) {
mlc->ipacket[idx] |= data | HIL_ERR_INT;
mlc->icount--;
- if (hp_sdc_mlc_priv.got5x) goto check;
- if (!idx) goto check;
- if ((mlc->ipacket[idx-1] & HIL_PKT_ADDR_MASK) !=
+ if (hp_sdc_mlc_priv.got5x || !idx)
+ goto check;
+ if ((mlc->ipacket[idx - 1] & HIL_PKT_ADDR_MASK) !=
(mlc->ipacket[idx] & HIL_PKT_ADDR_MASK)) {
mlc->ipacket[idx] &= ~HIL_PKT_ADDR_MASK;
- mlc->ipacket[idx] |= (mlc->ipacket[idx-1]
- & HIL_PKT_ADDR_MASK);
+ mlc->ipacket[idx] |= (mlc->ipacket[idx - 1]
+ & HIL_PKT_ADDR_MASK);
}
goto check;
}
/* We know status is 5X */
- if (data & HP_SDC_HIL_ISERR) goto err;
- mlc->ipacket[idx] =
+ if (data & HP_SDC_HIL_ISERR)
+ goto err;
+ mlc->ipacket[idx] =
(data & HP_SDC_HIL_R1MASK) << HIL_PKT_ADDR_SHIFT;
hp_sdc_mlc_priv.got5x = 1;
goto out;
check:
hp_sdc_mlc_priv.got5x = 0;
- if (mlc->imatch == 0) goto done;
- if ((mlc->imatch == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))
- && (mlc->ipacket[idx] == (mlc->imatch | idx))) goto done;
- if (mlc->ipacket[idx] == mlc->imatch) goto done;
+ if (mlc->imatch == 0)
+ goto done;
+ if ((mlc->imatch == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))
+ && (mlc->ipacket[idx] == (mlc->imatch | idx)))
+ goto done;
+ if (mlc->ipacket[idx] == mlc->imatch)
+ goto done;
goto out;
- err:
+ err:
printk(KERN_DEBUG PREFIX "err code %x\n", data);
+
switch (data) {
case HP_SDC_HIL_RC_DONE:
printk(KERN_WARNING PREFIX "Bastard SDC reconfigured loop!\n");
break;
+
case HP_SDC_HIL_ERR:
- mlc->ipacket[idx] |= HIL_ERR_INT | HIL_ERR_PERR |
- HIL_ERR_FERR | HIL_ERR_FOF;
+ mlc->ipacket[idx] |= HIL_ERR_INT | HIL_ERR_PERR |
+ HIL_ERR_FERR | HIL_ERR_FOF;
break;
+
case HP_SDC_HIL_TO:
mlc->ipacket[idx] |= HIL_ERR_INT | HIL_ERR_LERR;
break;
+
case HP_SDC_HIL_RC:
printk(KERN_WARNING PREFIX "Bastard SDC decided to reconfigure loop!\n");
break;
+
default:
printk(KERN_WARNING PREFIX "Unkown HIL Error status (%x)!\n", data);
break;
}
+
/* No more data will be coming due to an error. */
done:
tasklet_schedule(mlc->tasklet);
- up(&(mlc->isem));
+ up(&mlc->isem);
out:
- write_unlock(&(mlc->lock));
+ write_unlock(&mlc->lock);
}
/******************** Tasklet or userspace context functions ****************/
-static int hp_sdc_mlc_in (hil_mlc *mlc, suseconds_t timeout) {
+static int hp_sdc_mlc_in(hil_mlc *mlc, suseconds_t timeout)
+{
unsigned long flags;
struct hp_sdc_mlc_priv_s *priv;
int rc = 2;
priv = mlc->priv;
- write_lock_irqsave(&(mlc->lock), flags);
+ write_lock_irqsave(&mlc->lock, flags);
/* Try to down the semaphore */
- if (down_trylock(&(mlc->isem))) {
+ if (down_trylock(&mlc->isem)) {
struct timeval tv;
if (priv->emtestmode) {
- mlc->ipacket[0] =
- HIL_ERR_INT | (mlc->opacket &
- (HIL_PKT_CMD |
- HIL_PKT_ADDR_MASK |
+ mlc->ipacket[0] =
+ HIL_ERR_INT | (mlc->opacket &
+ (HIL_PKT_CMD |
+ HIL_PKT_ADDR_MASK |
HIL_PKT_DATA_MASK));
mlc->icount = 14;
/* printk(KERN_DEBUG PREFIX ">[%x]\n", mlc->ipacket[0]); */
goto wasup;
}
do_gettimeofday(&tv);
- tv.tv_usec += 1000000 * (tv.tv_sec - mlc->instart.tv_sec);
+ tv.tv_usec += USEC_PER_SEC * (tv.tv_sec - mlc->instart.tv_sec);
if (tv.tv_usec - mlc->instart.tv_usec > mlc->intimeout) {
- /* printk("!%i %i",
- tv.tv_usec - mlc->instart.tv_usec,
- mlc->intimeout);
- */
+ /* printk("!%i %i",
+ tv.tv_usec - mlc->instart.tv_usec,
+ mlc->intimeout);
+ */
rc = 1;
- up(&(mlc->isem));
+ up(&mlc->isem);
}
goto done;
}
wasup:
- up(&(mlc->isem));
+ up(&mlc->isem);
rc = 0;
goto done;
done:
- write_unlock_irqrestore(&(mlc->lock), flags);
+ write_unlock_irqrestore(&mlc->lock, flags);
return rc;
}
-static int hp_sdc_mlc_cts (hil_mlc *mlc) {
+static int hp_sdc_mlc_cts(hil_mlc *mlc)
+{
struct hp_sdc_mlc_priv_s *priv;
unsigned long flags;
- priv = mlc->priv;
+ priv = mlc->priv;
- write_lock_irqsave(&(mlc->lock), flags);
+ write_lock_irqsave(&mlc->lock, flags);
/* Try to down the semaphores -- they should be up. */
- if (down_trylock(&(mlc->isem))) {
- BUG();
- goto busy;
- }
- if (down_trylock(&(mlc->osem))) {
- BUG();
- up(&(mlc->isem));
- goto busy;
- }
- up(&(mlc->isem));
- up(&(mlc->osem));
+ BUG_ON(down_trylock(&mlc->isem));
+ BUG_ON(down_trylock(&mlc->osem));
- if (down_trylock(&(mlc->csem))) {
- if (priv->trans.act.semaphore != &(mlc->csem)) goto poll;
- goto busy;
+ up(&mlc->isem);
+ up(&mlc->osem);
+
+ if (down_trylock(&mlc->csem)) {
+ if (priv->trans.act.semaphore != &mlc->csem)
+ goto poll;
+ else
+ goto busy;
}
- if (!(priv->tseq[4] & HP_SDC_USE_LOOP)) goto done;
+
+ if (!(priv->tseq[4] & HP_SDC_USE_LOOP))
+ goto done;
poll:
- priv->trans.act.semaphore = &(mlc->csem);
+ priv->trans.act.semaphore = &mlc->csem;
priv->trans.actidx = 0;
priv->trans.idx = 1;
priv->trans.endidx = 5;
- priv->tseq[0] =
+ priv->tseq[0] =
HP_SDC_ACT_POSTCMD | HP_SDC_ACT_DATAIN | HP_SDC_ACT_SEMAPHORE;
priv->tseq[1] = HP_SDC_CMD_READ_USE;
priv->tseq[2] = 1;
priv->tseq[3] = 0;
priv->tseq[4] = 0;
- hp_sdc_enqueue_transaction(&(priv->trans));
+ hp_sdc_enqueue_transaction(&priv->trans);
busy:
- write_unlock_irqrestore(&(mlc->lock), flags);
+ write_unlock_irqrestore(&mlc->lock, flags);
return 1;
done:
- priv->trans.act.semaphore = &(mlc->osem);
- up(&(mlc->csem));
- write_unlock_irqrestore(&(mlc->lock), flags);
+ priv->trans.act.semaphore = &mlc->osem;
+ up(&mlc->csem);
+ write_unlock_irqrestore(&mlc->lock, flags);
return 0;
}
-static void hp_sdc_mlc_out (hil_mlc *mlc) {
+static void hp_sdc_mlc_out(hil_mlc *mlc)
+{
struct hp_sdc_mlc_priv_s *priv;
unsigned long flags;
priv = mlc->priv;
- write_lock_irqsave(&(mlc->lock), flags);
-
+ write_lock_irqsave(&mlc->lock, flags);
+
/* Try to down the semaphore -- it should be up. */
- if (down_trylock(&(mlc->osem))) {
- BUG();
- goto done;
- }
+ BUG_ON(down_trylock(&mlc->osem));
- if (mlc->opacket & HIL_DO_ALTER_CTRL) goto do_control;
+ if (mlc->opacket & HIL_DO_ALTER_CTRL)
+ goto do_control;
do_data:
if (priv->emtestmode) {
- up(&(mlc->osem));
+ up(&mlc->osem);
goto done;
}
/* Shouldn't be sending commands when loop may be busy */
- if (down_trylock(&(mlc->csem))) {
- BUG();
- goto done;
- }
- up(&(mlc->csem));
+ BUG_ON(down_trylock(&mlc->csem));
+ up(&mlc->csem);
priv->trans.actidx = 0;
priv->trans.idx = 1;
- priv->trans.act.semaphore = &(mlc->osem);
+ priv->trans.act.semaphore = &mlc->osem;
priv->trans.endidx = 6;
- priv->tseq[0] =
+ priv->tseq[0] =
HP_SDC_ACT_DATAREG | HP_SDC_ACT_POSTCMD | HP_SDC_ACT_SEMAPHORE;
priv->tseq[1] = 0x7;
- priv->tseq[2] =
- (mlc->opacket &
+ priv->tseq[2] =
+ (mlc->opacket &
(HIL_PKT_ADDR_MASK | HIL_PKT_CMD))
>> HIL_PKT_ADDR_SHIFT;
- priv->tseq[3] =
- (mlc->opacket & HIL_PKT_DATA_MASK)
+ priv->tseq[3] =
+ (mlc->opacket & HIL_PKT_DATA_MASK)
>> HIL_PKT_DATA_SHIFT;
priv->tseq[4] = 0; /* No timeout */
- if (priv->tseq[3] == HIL_CMD_DHR) priv->tseq[4] = 1;
+ if (priv->tseq[3] == HIL_CMD_DHR)
+ priv->tseq[4] = 1;
priv->tseq[5] = HP_SDC_CMD_DO_HIL;
goto enqueue;
do_control:
priv->emtestmode = mlc->opacket & HIL_CTRL_TEST;
-
+
/* we cannot emulate this, it should not be used. */
BUG_ON((mlc->opacket & (HIL_CTRL_APE | HIL_CTRL_IPF)) == HIL_CTRL_APE);
-
- if ((mlc->opacket & HIL_CTRL_ONLY) == HIL_CTRL_ONLY) goto control_only;
- if (mlc->opacket & HIL_CTRL_APE) {
- BUG(); /* Should not send command/data after engaging APE */
- goto done;
- }
- /* Disengaging APE this way would not be valid either since
+
+ if ((mlc->opacket & HIL_CTRL_ONLY) == HIL_CTRL_ONLY)
+ goto control_only;
+
+ /* Should not send command/data after engaging APE */
+ BUG_ON(mlc->opacket & HIL_CTRL_APE);
+
+ /* Disengaging APE this way would not be valid either since
* the loop must be allowed to idle.
*
- * So, it works out that we really never actually send control
- * and data when using SDC, we just send the data.
+ * So, it works out that we really never actually send control
+ * and data when using SDC, we just send the data.
*/
goto do_data;
control_only:
priv->trans.actidx = 0;
priv->trans.idx = 1;
- priv->trans.act.semaphore = &(mlc->osem);
+ priv->trans.act.semaphore = &mlc->osem;
priv->trans.endidx = 4;
- priv->tseq[0] =
+ priv->tseq[0] =
HP_SDC_ACT_PRECMD | HP_SDC_ACT_DATAOUT | HP_SDC_ACT_SEMAPHORE;
priv->tseq[1] = HP_SDC_CMD_SET_LPC;
priv->tseq[2] = 1;
- // priv->tseq[3] = (mlc->ddc + 1) | HP_SDC_LPS_ACSUCC;
+ /* priv->tseq[3] = (mlc->ddc + 1) | HP_SDC_LPS_ACSUCC; */
priv->tseq[3] = 0;
if (mlc->opacket & HIL_CTRL_APE) {
priv->tseq[3] |= HP_SDC_LPC_APE_IPF;
- down_trylock(&(mlc->csem));
- }
+ down_trylock(&mlc->csem);
+ }
enqueue:
- hp_sdc_enqueue_transaction(&(priv->trans));
+ hp_sdc_enqueue_transaction(&priv->trans);
done:
- write_unlock_irqrestore(&(mlc->lock), flags);
+ write_unlock_irqrestore(&mlc->lock, flags);
}
static int __init hp_sdc_mlc_init(void)
hp_sdc_mlc_priv.emtestmode = 0;
hp_sdc_mlc_priv.trans.seq = hp_sdc_mlc_priv.tseq;
- hp_sdc_mlc_priv.trans.act.semaphore = &(mlc->osem);
+ hp_sdc_mlc_priv.trans.act.semaphore = &mlc->osem;
hp_sdc_mlc_priv.got5x = 0;
- mlc->cts = &hp_sdc_mlc_cts;
- mlc->in = &hp_sdc_mlc_in;
- mlc->out = &hp_sdc_mlc_out;
-
- mlc->priv = &hp_sdc_mlc_priv;
+ mlc->cts = &hp_sdc_mlc_cts;
+ mlc->in = &hp_sdc_mlc_in;
+ mlc->out = &hp_sdc_mlc_out;
+ mlc->priv = &hp_sdc_mlc_priv;
if (hil_mlc_register(mlc)) {
printk(KERN_WARNING PREFIX "Failed to register MLC structure with hil_mlc\n");
}
return 0;
err1:
- if (hil_mlc_unregister(mlc)) {
+ if (hil_mlc_unregister(mlc))
printk(KERN_ERR PREFIX "Failed to unregister MLC structure with hil_mlc.\n"
"This is bad. Could cause an oops.\n");
- }
err0:
return -EBUSY;
}
static void __exit hp_sdc_mlc_exit(void)
{
hil_mlc *mlc = &hp_sdc_mlc;
- if (hp_sdc_release_hil_irq(&hp_sdc_mlc_isr)) {
+
+ if (hp_sdc_release_hil_irq(&hp_sdc_mlc_isr))
printk(KERN_ERR PREFIX "Failed to release the raw HIL ISR hook.\n"
"This is bad. Could cause an oops.\n");
- }
- if (hil_mlc_unregister(mlc)) {
+
+ if (hil_mlc_unregister(mlc))
printk(KERN_ERR PREFIX "Failed to unregister MLC structure with hil_mlc.\n"
"This is bad. Could cause an oops.\n");
- }
}
module_init(hp_sdc_mlc_init);
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff