diff options
author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-08-08 06:17:46 (GMT) |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-08-09 20:26:37 (GMT) |
commit | 6777f01728d5fc40e02cc0ae43639bf51cc247dd (patch) | |
tree | 8be1ed951cdcdc0e98520c2a3ad6afa331e82af7 | |
parent | 67dbe83adca4415e210e436bf961e8a833030d1e (diff) | |
download | linux-fsl-qoriq-6777f01728d5fc40e02cc0ae43639bf51cc247dd.tar.xz |
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>
-rw-r--r-- | drivers/input/keyboard/hil_kbd.c | 272 |
1 files changed, 140 insertions, 132 deletions
diff --git a/drivers/input/keyboard/hil_kbd.c b/drivers/input/keyboard/hil_kbd.c index f732893..fe57044 100644 --- a/drivers/input/keyboard/hil_kbd.c +++ b/drivers/input/keyboard/hil_kbd.c @@ -37,7 +37,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> -#include <linux/semaphore.h> +#include <linux/completion.h> #include <linux/slab.h> #include <linux/pci_ids.h> @@ -81,135 +81,128 @@ struct hil_kbd { char exd[HIL_KBD_MAX_LENGTH]; /* EXD record */ char rnm[HIL_KBD_MAX_LENGTH + 1]; /* RNM record + NULL term. */ - /* Something to sleep around with. */ - struct semaphore sem; + struct completion cmd_done; }; -/* Process a complete packet after transfer from the HIL */ -static void hil_kbd_process_record(struct hil_kbd *kbd) +static bool hil_kbd_is_command_response(hil_packet p) { - struct input_dev *dev = kbd->dev; - hil_packet *data = kbd->data; - hil_packet p; - int idx, i, cnt; + if ((p & ~HIL_CMDCT_POL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_POL)) + return false; - idx = kbd->idx4/4; - p = data[idx - 1]; + if ((p & ~HIL_CMDCT_RPL) == (HIL_ERR_INT | HIL_PKT_CMD | HIL_CMD_RPL)) + return false; + + return true; +} + +static void hil_kbd_handle_command_response(struct hil_kbd *kbd) +{ + hil_packet p; + char *buf; + int i, idx; - 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; + idx = kbd->idx4 / 4; + p = kbd->data[idx - 1]; - /* Not a poll response. See if we are loading config records. */ switch (p & HIL_PKT_DATA_MASK) { case HIL_CMD_IDD: - for (i = 0; i < idx; i++) - kbd->idd[i] = kbd->data[i] & HIL_PKT_DATA_MASK; - for (; i < HIL_KBD_MAX_LENGTH; i++) - kbd->idd[i] = 0; + buf = kbd->idd; 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; + buf = kbd->rsc; 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; + buf = kbd->exd; 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'; + kbd->rnm[HIL_KBD_MAX_LENGTH] = 0; + buf = kbd->rnm; break; default: /* These occur when device isn't present */ - 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; + if (p != (HIL_ERR_INT | HIL_PKT_CMD)) { + /* Anything else we'd like to know about. */ + printk(KERN_WARNING PREFIX "Device sent unknown record %x\n", p); + } + goto out; } - goto out; - report: - cnt = 1; + for (i = 0; i < idx; i++) + buf[i] = kbd->data[i] & HIL_PKT_DATA_MASK; + for (; i < HIL_KBD_MAX_LENGTH; i++) + buf[i] = 0; + out: + complete(&kbd->cmd_done); +} + +static void hil_kbd_handle_key_events(struct hil_kbd *kbd) +{ + struct input_dev *dev = kbd->dev; + int idx = kbd->idx4 / 4; + int i; + switch (kbd->data[0] & HIL_POL_CHARTYPE_MASK) { case HIL_POL_CHARTYPE_NONE: - break; + return; case HIL_POL_CHARTYPE_ASCII: - while (cnt < idx - 1) - input_report_key(dev, kbd->data[cnt++] & 0x7f, 1); + for (i = 1; i < idx - 1; i++) + input_report_key(dev, kbd->data[i] & 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); + for (i = 1; i < idx - 1; i++) + input_report_key(dev, kbd->data[i], 1); break; case HIL_POL_CHARTYPE_SET1: - while (cnt < idx - 1) { - unsigned int key; - int up; - key = kbd->data[cnt++]; - up = key & HIL_KBD_SET1_UPBIT; + for (i = 1; i < idx - 1; i++) { + unsigned int key = kbd->data[i]; + int up = key & HIL_KBD_SET1_UPBIT; + key &= (~HIL_KBD_SET1_UPBIT & 0xff); key = hil_kbd_set1[key >> HIL_KBD_SET1_SHIFT]; - if (key != KEY_RESERVED) - input_report_key(dev, key, !up); + input_report_key(dev, key, !up); } break; case HIL_POL_CHARTYPE_SET2: - while (cnt < idx - 1) { - unsigned int key; - int up; - key = kbd->data[cnt++]; - up = key & HIL_KBD_SET2_UPBIT; + for (i = 1; i < idx - 1; i++) { + unsigned int key = kbd->data[i]; + int up = key & HIL_KBD_SET2_UPBIT; + key &= (~HIL_KBD_SET1_UPBIT & 0xff); key = key >> HIL_KBD_SET2_SHIFT; - if (key != KEY_RESERVED) - input_report_key(dev, key, !up); + input_report_key(dev, key, !up); } break; case HIL_POL_CHARTYPE_SET3: - while (cnt < idx - 1) { - unsigned int key; - int up; - key = kbd->data[cnt++]; - up = key & HIL_KBD_SET3_UPBIT; + for (i = 1; i < idx - 1; i++) { + unsigned int key = kbd->data[i]; + int up = key & HIL_KBD_SET3_UPBIT; + key &= (~HIL_KBD_SET1_UPBIT & 0xff); key = hil_kbd_set3[key >> HIL_KBD_SET3_SHIFT]; - if (key != KEY_RESERVED) - input_report_key(dev, key, !up); + input_report_key(dev, key, !up); } break; } - out: - kbd->idx4 = 0; - up(&kbd->sem); + + input_sync(dev); } static void hil_kbd_process_err(struct hil_kbd *kbd) { printk(KERN_WARNING PREFIX "errored HIL packet\n"); kbd->idx4 = 0; - up(&kbd->sem); + complete(&kbd->cmd_done); /* just in case somebody is waiting */ } static irqreturn_t hil_kbd_interrupt(struct serio *serio, @@ -222,11 +215,12 @@ static irqreturn_t hil_kbd_interrupt(struct serio *serio, kbd = serio_get_drvdata(serio); BUG_ON(kbd == NULL); - if (kbd->idx4 >= (HIL_KBD_MAX_LENGTH * sizeof(hil_packet))) { + if (kbd->idx4 >= HIL_KBD_MAX_LENGTH * sizeof(hil_packet)) { hil_kbd_process_err(kbd); - return IRQ_HANDLED; + goto out; } - idx = kbd->idx4/4; + + idx = kbd->idx4 / 4; if (!(kbd->idx4 % 4)) kbd->data[idx] = 0; packet = kbd->data[idx]; @@ -234,22 +228,25 @@ static irqreturn_t hil_kbd_interrupt(struct serio *serio, kbd->data[idx] = packet; /* Records of N 4-byte hil_packets must terminate with a command. */ - if ((++(kbd->idx4)) % 4) - return IRQ_HANDLED; - if ((packet & 0xffff0000) != HIL_ERR_INT) { - hil_kbd_process_err(kbd); - return IRQ_HANDLED; + if ((++kbd->idx4 % 4) == 0) { + if ((packet & 0xffff0000) != HIL_ERR_INT) { + hil_kbd_process_err(kbd); + } else if (packet & HIL_PKT_CMD) { + if (hil_kbd_is_command_response(packet)) + hil_kbd_handle_command_response(kbd); + else + hil_kbd_handle_key_events(kbd); + kbd->idx4 = 0; + } } - if (packet & HIL_PKT_CMD) - hil_kbd_process_record(kbd); + out: return IRQ_HANDLED; } static void hil_kbd_disconnect(struct serio *serio) { - struct hil_kbd *kbd; + struct hil_kbd *kbd = serio_get_drvdata(serio); - kbd = serio_get_drvdata(serio); BUG_ON(kbd == NULL); serio_close(serio); @@ -259,52 +256,64 @@ static void hil_kbd_disconnect(struct serio *serio) static int hil_kbd_connect(struct serio *serio, struct serio_driver *drv) { - struct hil_kbd *kbd; - uint8_t did, *idd; - int i; + struct hil_kbd *kbd; + struct input_dev *input_dev; + uint8_t did, *idd; + int i; + int error; kbd = kzalloc(sizeof(*kbd), GFP_KERNEL); - if (!kbd) - return -ENOMEM; - - kbd->dev = input_allocate_device(); - if (!kbd->dev) + input_dev = input_allocate_device(); + if (!kbd || !input_dev) { + error = -ENOMEM; goto bail0; + } - if (serio_open(serio, drv)) - goto bail1; - - serio_set_drvdata(serio, kbd); kbd->serio = serio; + kbd->dev = input_dev; + + error = serio_open(serio, drv); + if (error) + goto bail0; - init_MUTEX_LOCKED(&kbd->sem); + serio_set_drvdata(serio, kbd); /* Get device info. MLC driver supplies devid/status/etc. */ + init_completion(&kbd->cmd_done); serio_write(serio, 0); serio_write(serio, 0); serio_write(serio, HIL_PKT_CMD >> 8); serio_write(serio, HIL_CMD_IDD); - down(&kbd->sem); + error = wait_for_completion_killable(&kbd->cmd_done); + if (error) + goto bail1; + init_completion(&kbd->cmd_done); serio_write(serio, 0); serio_write(serio, 0); serio_write(serio, HIL_PKT_CMD >> 8); serio_write(serio, HIL_CMD_RSC); - down(&kbd->sem); + error = wait_for_completion_killable(&kbd->cmd_done); + if (error) + goto bail1; + init_completion(&kbd->cmd_done); serio_write(serio, 0); serio_write(serio, 0); serio_write(serio, HIL_PKT_CMD >> 8); serio_write(serio, HIL_CMD_RNM); - down(&kbd->sem); + error = wait_for_completion_killable(&kbd->cmd_done); + if (error) + goto bail1; + init_completion(&kbd->cmd_done); serio_write(serio, 0); serio_write(serio, 0); serio_write(serio, HIL_PKT_CMD >> 8); serio_write(serio, HIL_CMD_EXD); - down(&kbd->sem); - - up(&kbd->sem); + error = wait_for_completion_killable(&kbd->cmd_done); + if (error) + goto bail1; did = kbd->idd[0]; idd = kbd->idd + 1; @@ -317,55 +326,54 @@ static int hil_kbd_connect(struct serio *serio, struct serio_driver *drv) did, hil_language[did & HIL_IDD_DID_TYPE_KB_LANG_MASK]); break; default: - goto bail2; + goto bail1; } 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; + goto bail1; } - kbd->dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); - kbd->dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) | - BIT_MASK(LED_SCROLLL); - kbd->dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE; - kbd->dev->keycodesize = sizeof(hil_kbd_set1[0]); - kbd->dev->keycode = hil_kbd_set1; - kbd->dev->name = strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME; - kbd->dev->phys = "hpkbd/input0"; /* XXX */ - - kbd->dev->id.bustype = BUS_HIL; - kbd->dev->id.vendor = PCI_VENDOR_ID_HP; - kbd->dev->id.product = 0x0001; /* TODO: get from kbd->rsc */ - kbd->dev->id.version = 0x0100; /* TODO: get from kbd->rsc */ - kbd->dev->dev.parent = &serio->dev; + input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP); + input_dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) | + BIT_MASK(LED_SCROLLL); + input_dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE; + input_dev->keycodesize = sizeof(hil_kbd_set1[0]); + input_dev->keycode = hil_kbd_set1; + input_dev->name = strlen(kbd->rnm) ? kbd->rnm : HIL_GENERIC_NAME; + input_dev->phys = "hpkbd/input0"; /* XXX */ + + input_dev->id.bustype = BUS_HIL; + input_dev->id.vendor = PCI_VENDOR_ID_HP; + input_dev->id.product = 0x0001; /* TODO: get from kbd->rsc */ + input_dev->id.version = 0x0100; /* TODO: get from kbd->rsc */ + input_dev->dev.parent = &serio->dev; for (i = 0; i < 128; i++) { - set_bit(hil_kbd_set1[i], kbd->dev->keybit); - set_bit(hil_kbd_set3[i], kbd->dev->keybit); + __set_bit(hil_kbd_set1[i], input_dev->keybit); + __set_bit(hil_kbd_set3[i], input_dev->keybit); } - clear_bit(0, kbd->dev->keybit); - - input_register_device(kbd->dev); - printk(KERN_INFO "input: %s, ID: %d\n", - kbd->dev->name, did); + __clear_bit(KEY_RESERVED, input_dev->keybit); serio_write(serio, 0); 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); + /* No need to wait for completion */ + + error = input_register_device(kbd->dev); + if (error) + goto bail1; return 0; - bail2: + + bail1: serio_close(serio); serio_set_drvdata(serio, NULL); - bail1: - input_free_device(kbd->dev); bail0: + input_free_device(input_dev); kfree(kbd); - return -EIO; + return error; } static struct serio_device_id hil_kbd_ids[] = { |