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Input: hil_kbd - switch to use completion instead of semaphore
Stop abusing semaphore for waiting, use completion instead. Also handle errors from input_register_device. Tested-by: Helge Deller <deller@gmx.de> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
This commit is contained in:
Dmitry Torokhov
parent
67dbe83adc
commit
6777f01728
@ -37,7 +37,7 @@
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/semaphore.h>
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#include <linux/completion.h>
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#include <linux/slab.h>
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#include <linux/pci_ids.h>
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@ -81,135 +81,128 @@ struct hil_kbd {
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char exd[HIL_KBD_MAX_LENGTH]; /* EXD record */
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char rnm[HIL_KBD_MAX_LENGTH + 1]; /* RNM record + NULL term. */
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/* Something to sleep around with. */
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struct semaphore sem;
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struct completion cmd_done;
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};
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/* Process a complete packet after transfer from the HIL */
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static void hil_kbd_process_record(struct hil_kbd *kbd)
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static bool hil_kbd_is_command_response(hil_packet p)
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{
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if ((p & ~HIL_CMDCT_POL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))
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return false;
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if ((p & ~HIL_CMDCT_RPL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL))
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return false;
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return true;
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}
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static void hil_kbd_handle_command_response(struct hil_kbd *kbd)
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{
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struct input_dev *dev = kbd->dev;
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hil_packet *data = kbd->data;
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hil_packet p;
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int idx, i, cnt;
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char *buf;
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int i, idx;
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idx = kbd->idx4 / 4;
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p = data[idx - 1];
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p = kbd->data[idx - 1];
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if ((p & ~HIL_CMDCT_POL) ==
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(HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL))
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goto report;
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if ((p & ~HIL_CMDCT_RPL) ==
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(HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL))
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goto report;
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/* Not a poll response. See if we are loading config records. */
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switch (p & HIL_PKT_DATA_MASK) {
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case HIL_CMD_IDD:
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for (i = 0; i < idx; i++)
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kbd->idd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_KBD_MAX_LENGTH; i++)
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kbd->idd[i] = 0;
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buf = kbd->idd;
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break;
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case HIL_CMD_RSC:
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for (i = 0; i < idx; i++)
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kbd->rsc[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_KBD_MAX_LENGTH; i++)
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kbd->rsc[i] = 0;
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buf = kbd->rsc;
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break;
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case HIL_CMD_EXD:
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for (i = 0; i < idx; i++)
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kbd->exd[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_KBD_MAX_LENGTH; i++)
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kbd->exd[i] = 0;
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buf = kbd->exd;
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break;
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case HIL_CMD_RNM:
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for (i = 0; i < idx; i++)
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kbd->rnm[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_KBD_MAX_LENGTH + 1; i++)
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kbd->rnm[i] = '\0';
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kbd->rnm[HIL_KBD_MAX_LENGTH] = 0;
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buf = kbd->rnm;
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break;
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default:
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/* These occur when device isn't present */
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if (p == (HIL_ERR_INT | HIL_PKT_CMD))
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break;
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if (p != (HIL_ERR_INT | HIL_PKT_CMD)) {
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/* Anything else we'd like to know about. */
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printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p);
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break;
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}
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goto out;
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}
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for (i = 0; i < idx; i++)
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buf[i] = kbd->data[i] & HIL_PKT_DATA_MASK;
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for (; i < HIL_KBD_MAX_LENGTH; i++)
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buf[i] = 0;
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out:
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complete(&kbd->cmd_done);
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}
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static void hil_kbd_handle_key_events(struct hil_kbd *kbd)
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{
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struct input_dev *dev = kbd->dev;
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int idx = kbd->idx4 / 4;
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int i;
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report:
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cnt = 1;
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switch (kbd->data[0] & HIL_POL_CHARTYPE_MASK) {
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case HIL_POL_CHARTYPE_NONE:
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break;
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return;
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case HIL_POL_CHARTYPE_ASCII:
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while (cnt < idx - 1)
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input_report_key(dev, kbd->data[cnt++] & 0x7f, 1);
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for (i = 1; i < idx - 1; i++)
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input_report_key(dev, kbd->data[i] & 0x7f, 1);
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break;
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case HIL_POL_CHARTYPE_RSVD1:
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case HIL_POL_CHARTYPE_RSVD2:
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case HIL_POL_CHARTYPE_BINARY:
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while (cnt < idx - 1)
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input_report_key(dev, kbd->data[cnt++], 1);
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for (i = 1; i < idx - 1; i++)
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input_report_key(dev, kbd->data[i], 1);
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break;
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case HIL_POL_CHARTYPE_SET1:
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while (cnt < idx - 1) {
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unsigned int key;
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int up;
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key = kbd->data[cnt++];
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up = key & HIL_KBD_SET1_UPBIT;
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for (i = 1; i < idx - 1; i++) {
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unsigned int key = kbd->data[i];
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int up = key & HIL_KBD_SET1_UPBIT;
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key &= (~HIL_KBD_SET1_UPBIT & 0xff);
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key = hil_kbd_set1[key >> HIL_KBD_SET1_SHIFT];
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if (key != KEY_RESERVED)
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input_report_key(dev, key, !up);
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}
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break;
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case HIL_POL_CHARTYPE_SET2:
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while (cnt < idx - 1) {
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unsigned int key;
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int up;
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key = kbd->data[cnt++];
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up = key & HIL_KBD_SET2_UPBIT;
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for (i = 1; i < idx - 1; i++) {
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unsigned int key = kbd->data[i];
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int up = key & HIL_KBD_SET2_UPBIT;
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key &= (~HIL_KBD_SET1_UPBIT & 0xff);
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key = key >> HIL_KBD_SET2_SHIFT;
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if (key != KEY_RESERVED)
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input_report_key(dev, key, !up);
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}
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break;
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case HIL_POL_CHARTYPE_SET3:
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while (cnt < idx - 1) {
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unsigned int key;
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int up;
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key = kbd->data[cnt++];
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up = key & HIL_KBD_SET3_UPBIT;
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for (i = 1; i < idx - 1; i++) {
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unsigned int key = kbd->data[i];
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int up = key & HIL_KBD_SET3_UPBIT;
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key &= (~HIL_KBD_SET1_UPBIT & 0xff);
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key = hil_kbd_set3[key >> HIL_KBD_SET3_SHIFT];
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if (key != KEY_RESERVED)
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input_report_key(dev, key, !up);
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}
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break;
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}
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out:
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kbd->idx4 = 0;
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up(&kbd->sem);
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input_sync(dev);
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}
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static void hil_kbd_process_err(struct hil_kbd *kbd)
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{
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printk(KERN_WARNING PREFIX "errored HIL packet\n");
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kbd->idx4 = 0;
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up(&kbd->sem);
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complete(&kbd->cmd_done); /* just in case somebody is waiting */
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}
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static irqreturn_t hil_kbd_interrupt(struct serio *serio,
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@ -222,10 +215,11 @@ static irqreturn_t hil_kbd_interrupt(struct serio *serio,
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kbd = serio_get_drvdata(serio);
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BUG_ON(kbd == NULL);
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if (kbd->idx4 >= (HIL_KBD_MAX_LENGTH * sizeof(hil_packet))) {
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if (kbd->idx4 >= HIL_KBD_MAX_LENGTH * sizeof(hil_packet)) {
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hil_kbd_process_err(kbd);
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return IRQ_HANDLED;
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goto out;
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}
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idx = kbd->idx4 / 4;
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if (!(kbd->idx4 % 4))
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kbd->data[idx] = 0;
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@ -234,22 +228,25 @@ static irqreturn_t hil_kbd_interrupt(struct serio *serio,
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kbd->data[idx] = packet;
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/* Records of N 4-byte hil_packets must terminate with a command. */
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if ((++(kbd->idx4)) % 4)
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return IRQ_HANDLED;
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if ((++kbd->idx4 % 4) == 0) {
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if ((packet & 0xffff0000) != HIL_ERR_INT) {
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hil_kbd_process_err(kbd);
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return IRQ_HANDLED;
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} else if (packet & HIL_PKT_CMD) {
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if (hil_kbd_is_command_response(packet))
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hil_kbd_handle_command_response(kbd);
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else
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hil_kbd_handle_key_events(kbd);
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kbd->idx4 = 0;
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}
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if (packet & HIL_PKT_CMD)
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hil_kbd_process_record(kbd);
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}
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out:
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return IRQ_HANDLED;
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}
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static void hil_kbd_disconnect(struct serio *serio)
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{
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struct hil_kbd *kbd;
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struct hil_kbd *kbd = serio_get_drvdata(serio);
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kbd = serio_get_drvdata(serio);
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BUG_ON(kbd == NULL);
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serio_close(serio);
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@ -260,51 +257,63 @@ static void hil_kbd_disconnect(struct serio *serio)
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static int hil_kbd_connect(struct serio *serio, struct serio_driver *drv)
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{
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struct hil_kbd *kbd;
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struct input_dev *input_dev;
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uint8_t did, *idd;
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int i;
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int error;
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kbd = kzalloc(sizeof(*kbd), GFP_KERNEL);
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if (!kbd)
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return -ENOMEM;
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input_dev = input_allocate_device();
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if (!kbd || !input_dev) {
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error = -ENOMEM;
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goto bail0;
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}
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kbd->dev = input_allocate_device();
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if (!kbd->dev)
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kbd->serio = serio;
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kbd->dev = input_dev;
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error = serio_open(serio, drv);
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if (error)
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goto bail0;
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if (serio_open(serio, drv))
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goto bail1;
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serio_set_drvdata(serio, kbd);
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kbd->serio = serio;
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init_MUTEX_LOCKED(&kbd->sem);
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/* Get device info. MLC driver supplies devid/status/etc. */
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init_completion(&kbd->cmd_done);
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serio_write(serio, 0);
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serio_write(serio, 0);
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serio_write(serio, HIL_PKT_CMD >> 8);
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serio_write(serio, HIL_CMD_IDD);
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down(&kbd->sem);
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error = wait_for_completion_killable(&kbd->cmd_done);
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if (error)
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goto bail1;
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init_completion(&kbd->cmd_done);
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serio_write(serio, 0);
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serio_write(serio, 0);
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serio_write(serio, HIL_PKT_CMD >> 8);
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serio_write(serio, HIL_CMD_RSC);
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down(&kbd->sem);
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error = wait_for_completion_killable(&kbd->cmd_done);
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if (error)
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goto bail1;
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init_completion(&kbd->cmd_done);
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serio_write(serio, 0);
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serio_write(serio, 0);
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serio_write(serio, HIL_PKT_CMD >> 8);
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serio_write(serio, HIL_CMD_RNM);
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down(&kbd->sem);
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error = wait_for_completion_killable(&kbd->cmd_done);
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if (error)
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goto bail1;
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init_completion(&kbd->cmd_done);
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serio_write(serio, 0);
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serio_write(serio, 0);
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serio_write(serio, HIL_PKT_CMD >> 8);
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serio_write(serio, HIL_CMD_EXD);
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down(&kbd->sem);
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up(&kbd->sem);
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error = wait_for_completion_killable(&kbd->cmd_done);
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if (error)
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goto bail1;
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did = kbd->idd[0];
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idd = kbd->idd + 1;
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@ -317,55 +326,54 @@ static int hil_kbd_connect(struct serio *serio, struct serio_driver *drv)
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did, hil_language[did & HIL_IDD_DID_TYPE_KB_LANG_MASK]);
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break;
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default:
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goto bail2;
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goto bail1;
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}
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if (HIL_IDD_NUM_BUTTONS(idd) || HIL_IDD_NUM_AXES_PER_SET(*idd)) {
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printk(KERN_INFO PREFIX "keyboards only, no combo devices supported.\n");
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goto bail2;
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goto bail1;
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}
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kbd->dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
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kbd->dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |
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input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
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input_dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |
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BIT_MASK(LED_SCROLLL);
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kbd->dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
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kbd->dev->keycodesize = sizeof(hil_kbd_set1[0]);
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kbd->dev->keycode = hil_kbd_set1;
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kbd->dev->name = strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME;
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kbd->dev->phys = "hpkbd/input0"; /* XXX */
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input_dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
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input_dev->keycodesize = sizeof(hil_kbd_set1[0]);
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input_dev->keycode = hil_kbd_set1;
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input_dev->name = strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME;
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input_dev->phys = "hpkbd/input0"; /* XXX */
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kbd->dev->id.bustype = BUS_HIL;
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kbd->dev->id.vendor = PCI_VENDOR_ID_HP;
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kbd->dev->id.product = 0x0001; /* TODO: get from kbd->rsc */
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kbd->dev->id.version = 0x0100; /* TODO: get from kbd->rsc */
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kbd->dev->dev.parent = &serio->dev;
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input_dev->id.bustype = BUS_HIL;
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input_dev->id.vendor = PCI_VENDOR_ID_HP;
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input_dev->id.product = 0x0001; /* TODO: get from kbd->rsc */
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input_dev->id.version = 0x0100; /* TODO: get from kbd->rsc */
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input_dev->dev.parent = &serio->dev;
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for (i = 0; i < 128; i++) {
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set_bit(hil_kbd_set1[i], kbd->dev->keybit);
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set_bit(hil_kbd_set3[i], kbd->dev->keybit);
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__set_bit(hil_kbd_set1[i], input_dev->keybit);
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__set_bit(hil_kbd_set3[i], input_dev->keybit);
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}
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clear_bit(0, kbd->dev->keybit);
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input_register_device(kbd->dev);
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printk(KERN_INFO "input: %s, ID: %d\n",
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kbd->dev->name, did);
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__clear_bit(KEY_RESERVED, input_dev->keybit);
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serio_write(serio, 0);
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serio_write(serio, 0);
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serio_write(serio, HIL_PKT_CMD >> 8);
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serio_write(serio, HIL_CMD_EK1); /* Enable Keyswitch Autorepeat 1 */
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down(&kbd->sem);
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up(&kbd->sem);
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/* No need to wait for completion */
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error = input_register_device(kbd->dev);
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if (error)
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goto bail1;
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return 0;
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bail2:
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bail1:
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serio_close(serio);
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serio_set_drvdata(serio, NULL);
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bail1:
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input_free_device(kbd->dev);
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bail0:
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input_free_device(input_dev);
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kfree(kbd);
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return -EIO;
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return error;
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}
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static struct serio_device_id hil_kbd_ids[] = {
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