pcf50633: Move irq related functions to it's own file.
[kernel.git] / drivers / mfd / pcf50633-core.c
index 63a614d..9c14dbf 100644 (file)
 #include <linux/workqueue.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
-#include <linux/irq.h>
 #include <linux/slab.h>
 
 #include <linux/mfd/pcf50633/core.h>
 
-/* Two MBCS registers used during cold start */
-#define PCF50633_REG_MBCS1             0x4b
-#define PCF50633_REG_MBCS2             0x4c
-#define PCF50633_MBCS1_USBPRES                 0x01
-#define PCF50633_MBCS1_ADAPTPRES       0x01
+int pcf50633_irq_init(struct pcf50633 *pcf, int irq);
+void pcf50633_irq_free(struct pcf50633 *pcf);
+#ifdef CONFIG_PM
+int pcf50633_irq_suspend(struct pcf50633 *pcf);
+int pcf50633_irq_resume(struct pcf50633 *pcf);
+#endif
 
 static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
 {
@@ -215,247 +215,9 @@ static struct attribute_group pcf_attr_group = {
        .attrs  = pcf_sysfs_entries,
 };
 
-int pcf50633_register_irq(struct pcf50633 *pcf, int irq,
-                       void (*handler) (int, void *), void *data)
-{
-       if (irq < 0 || irq > PCF50633_NUM_IRQ || !handler)
-               return -EINVAL;
-
-       if (WARN_ON(pcf->irq_handler[irq].handler))
-               return -EBUSY;
-
-       mutex_lock(&pcf->lock);
-       pcf->irq_handler[irq].handler = handler;
-       pcf->irq_handler[irq].data = data;
-       mutex_unlock(&pcf->lock);
-
-       return 0;
-}
-EXPORT_SYMBOL_GPL(pcf50633_register_irq);
-
-int pcf50633_free_irq(struct pcf50633 *pcf, int irq)
-{
-       if (irq < 0 || irq > PCF50633_NUM_IRQ)
-               return -EINVAL;
-
-       mutex_lock(&pcf->lock);
-       pcf->irq_handler[irq].handler = NULL;
-       mutex_unlock(&pcf->lock);
-
-       return 0;
-}
-EXPORT_SYMBOL_GPL(pcf50633_free_irq);
-
-static int __pcf50633_irq_mask_set(struct pcf50633 *pcf, int irq, u8 mask)
-{
-       u8 reg, bits, tmp;
-       int ret = 0, idx;
-
-       idx = irq >> 3;
-       reg =  PCF50633_REG_INT1M + idx;
-       bits = 1 << (irq & 0x07);
-
-       mutex_lock(&pcf->lock);
-
-       if (mask) {
-               ret = __pcf50633_read(pcf, reg, 1, &tmp);
-               if (ret < 0)
-                       goto out;
-
-               tmp |= bits;
-
-               ret = __pcf50633_write(pcf, reg, 1, &tmp);
-               if (ret < 0)
-                       goto out;
-
-               pcf->mask_regs[idx] &= ~bits;
-               pcf->mask_regs[idx] |= bits;
-       } else {
-               ret = __pcf50633_read(pcf, reg, 1, &tmp);
-               if (ret < 0)
-                       goto out;
-
-               tmp &= ~bits;
-
-               ret = __pcf50633_write(pcf, reg, 1, &tmp);
-               if (ret < 0)
-                       goto out;
-
-               pcf->mask_regs[idx] &= ~bits;
-       }
-out:
-       mutex_unlock(&pcf->lock);
-
-       return ret;
-}
-
-int pcf50633_irq_mask(struct pcf50633 *pcf, int irq)
-{
-       dev_dbg(pcf->dev, "Masking IRQ %d\n", irq);
-
-       return __pcf50633_irq_mask_set(pcf, irq, 1);
-}
-EXPORT_SYMBOL_GPL(pcf50633_irq_mask);
-
-int pcf50633_irq_unmask(struct pcf50633 *pcf, int irq)
-{
-       dev_dbg(pcf->dev, "Unmasking IRQ %d\n", irq);
-
-       return __pcf50633_irq_mask_set(pcf, irq, 0);
-}
-EXPORT_SYMBOL_GPL(pcf50633_irq_unmask);
-
-int pcf50633_irq_mask_get(struct pcf50633 *pcf, int irq)
-{
-       u8 reg, bits;
-
-       reg =  irq >> 3;
-       bits = 1 << (irq & 0x07);
-
-       return pcf->mask_regs[reg] & bits;
-}
-EXPORT_SYMBOL_GPL(pcf50633_irq_mask_get);
-
-static void pcf50633_irq_call_handler(struct pcf50633 *pcf, int irq)
-{
-       if (pcf->irq_handler[irq].handler)
-               pcf->irq_handler[irq].handler(irq, pcf->irq_handler[irq].data);
-}
-
-/* Maximum amount of time ONKEY is held before emergency action is taken */
-#define PCF50633_ONKEY1S_TIMEOUT 8
-
-static void pcf50633_irq_worker(struct work_struct *work)
-{
-       struct pcf50633 *pcf;
-       int ret, i, j;
-       u8 pcf_int[5], chgstat;
-
-       pcf = container_of(work, struct pcf50633, irq_work);
-
-       /* Read the 5 INT regs in one transaction */
-       ret = pcf50633_read_block(pcf, PCF50633_REG_INT1,
-                                               ARRAY_SIZE(pcf_int), pcf_int);
-       if (ret != ARRAY_SIZE(pcf_int)) {
-               dev_err(pcf->dev, "Error reading INT registers\n");
-
-               /*
-                * If this doesn't ACK the interrupt to the chip, we'll be
-                * called once again as we're level triggered.
-                */
-               goto out;
-       }
-
-       /* defeat 8s death from lowsys on A5 */
-       pcf50633_reg_write(pcf, PCF50633_REG_OOCSHDWN,  0x04);
-
-       /* We immediately read the usb and adapter status. We thus make sure
-        * only of USBINS/USBREM IRQ handlers are called */
-       if (pcf_int[0] & (PCF50633_INT1_USBINS | PCF50633_INT1_USBREM)) {
-               chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
-               if (chgstat & (0x3 << 4))
-                       pcf_int[0] &= ~(1 << PCF50633_INT1_USBREM);
-               else
-                       pcf_int[0] &= ~(1 << PCF50633_INT1_USBINS);
-       }
-
-       /* Make sure only one of ADPINS or ADPREM is set */
-       if (pcf_int[0] & (PCF50633_INT1_ADPINS | PCF50633_INT1_ADPREM)) {
-               chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
-               if (chgstat & (0x3 << 4))
-                       pcf_int[0] &= ~(1 << PCF50633_INT1_ADPREM);
-               else
-                       pcf_int[0] &= ~(1 << PCF50633_INT1_ADPINS);
-       }
-
-       dev_dbg(pcf->dev, "INT1=0x%02x INT2=0x%02x INT3=0x%02x "
-                       "INT4=0x%02x INT5=0x%02x\n", pcf_int[0],
-                       pcf_int[1], pcf_int[2], pcf_int[3], pcf_int[4]);
-
-       /* Some revisions of the chip don't have a 8s standby mode on
-        * ONKEY1S press. We try to manually do it in such cases. */
-       if ((pcf_int[0] & PCF50633_INT1_SECOND) && pcf->onkey1s_held) {
-               dev_info(pcf->dev, "ONKEY1S held for %d secs\n",
-                                                       pcf->onkey1s_held);
-               if (pcf->onkey1s_held++ == PCF50633_ONKEY1S_TIMEOUT)
-                       if (pcf->pdata->force_shutdown)
-                               pcf->pdata->force_shutdown(pcf);
-       }
-
-       if (pcf_int[2] & PCF50633_INT3_ONKEY1S) {
-               dev_info(pcf->dev, "ONKEY1S held\n");
-               pcf->onkey1s_held = 1 ;
-
-               /* Unmask IRQ_SECOND */
-               pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT1M,
-                                               PCF50633_INT1_SECOND);
-
-               /* Unmask IRQ_ONKEYR */
-               pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT2M,
-                                               PCF50633_INT2_ONKEYR);
-       }
-
-       if ((pcf_int[1] & PCF50633_INT2_ONKEYR) && pcf->onkey1s_held) {
-               pcf->onkey1s_held = 0;
-
-               /* Mask SECOND and ONKEYR interrupts */
-               if (pcf->mask_regs[0] & PCF50633_INT1_SECOND)
-                       pcf50633_reg_set_bit_mask(pcf,
-                                       PCF50633_REG_INT1M,
-                                       PCF50633_INT1_SECOND,
-                                       PCF50633_INT1_SECOND);
-
-               if (pcf->mask_regs[1] & PCF50633_INT2_ONKEYR)
-                       pcf50633_reg_set_bit_mask(pcf,
-                                       PCF50633_REG_INT2M,
-                                       PCF50633_INT2_ONKEYR,
-                                       PCF50633_INT2_ONKEYR);
-       }
-
-       /* Have we just resumed ? */
-       if (pcf->is_suspended) {
-               pcf->is_suspended = 0;
-
-               /* Set the resume reason filtering out non resumers */
-               for (i = 0; i < ARRAY_SIZE(pcf_int); i++)
-                       pcf->resume_reason[i] = pcf_int[i] &
-                                               pcf->pdata->resumers[i];
-
-               /* Make sure we don't pass on any ONKEY events to
-                * userspace now */
-               pcf_int[1] &= ~(PCF50633_INT2_ONKEYR | PCF50633_INT2_ONKEYF);
-       }
-
-       for (i = 0; i < ARRAY_SIZE(pcf_int); i++) {
-               /* Unset masked interrupts */
-               pcf_int[i] &= ~pcf->mask_regs[i];
-
-               for (j = 0; j < 8 ; j++)
-                       if (pcf_int[i] & (1 << j))
-                               pcf50633_irq_call_handler(pcf, (i * 8) + j);
-       }
-
-out:
-       put_device(pcf->dev);
-       enable_irq(pcf->irq);
-}
-
-static irqreturn_t pcf50633_irq(int irq, void *data)
-{
-       struct pcf50633 *pcf = data;
-
-       dev_dbg(pcf->dev, "pcf50633_irq\n");
-
-       get_device(pcf->dev);
-       disable_irq_nosync(pcf->irq);
-       queue_work(pcf->work_queue, &pcf->irq_work);
-
-       return IRQ_HANDLED;
-}
-
 static void
 pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
-                                               struct platform_device **pdev)
+                                                       struct platform_device **pdev)
 {
        int ret;
 
@@ -479,70 +241,17 @@ pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
 static int pcf50633_suspend(struct i2c_client *client, pm_message_t state)
 {
        struct pcf50633 *pcf;
-       int ret = 0, i;
-       u8 res[5];
-
        pcf = i2c_get_clientdata(client);
 
-       /* Make sure our interrupt handlers are not called
-        * henceforth */
-       disable_irq(pcf->irq);
-
-       /* Make sure that any running IRQ worker has quit */
-       cancel_work_sync(&pcf->irq_work);
-
-       /* Save the masks */
-       ret = pcf50633_read_block(pcf, PCF50633_REG_INT1M,
-                               ARRAY_SIZE(pcf->suspend_irq_masks),
-                                       pcf->suspend_irq_masks);
-       if (ret < 0) {
-               dev_err(pcf->dev, "error saving irq masks\n");
-               goto out;
-       }
-
-       /* Write wakeup irq masks */
-       for (i = 0; i < ARRAY_SIZE(res); i++)
-               res[i] = ~pcf->pdata->resumers[i];
-
-       ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M,
-                                       ARRAY_SIZE(res), &res[0]);
-       if (ret < 0) {
-               dev_err(pcf->dev, "error writing wakeup irq masks\n");
-               goto out;
-       }
-
-       pcf->is_suspended = 1;
-
-out:
-       return ret;
+       return pcf50633_irq_suspend(pcf);
 }
 
 static int pcf50633_resume(struct i2c_client *client)
 {
        struct pcf50633 *pcf;
-       int ret;
-
        pcf = i2c_get_clientdata(client);
 
-       /* Write the saved mask registers */
-       ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M,
-                               ARRAY_SIZE(pcf->suspend_irq_masks),
-                                       pcf->suspend_irq_masks);
-       if (ret < 0)
-               dev_err(pcf->dev, "Error restoring saved suspend masks\n");
-
-       /* Restore regulators' state */
-
-
-       get_device(pcf->dev);
-
-       /*
-        * Clear any pending interrupts and set resume reason if any.
-        * This will leave with enable_irq()
-        */
-       pcf50633_irq_worker(&pcf->irq_work);
-
-       return 0;
+       return pcf50633_irq_resume(pcf);
 }
 #else
 #define pcf50633_suspend NULL
@@ -573,43 +282,19 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
        i2c_set_clientdata(client, pcf);
        pcf->dev = &client->dev;
        pcf->i2c_client = client;
-       pcf->irq = client->irq;
-       pcf->work_queue = create_singlethread_workqueue("pcf50633");
-
-       if (!pcf->work_queue) {
-               dev_err(&client->dev, "Failed to alloc workqueue\n");
-               ret = -ENOMEM;
-               goto err_free;
-       }
-
-       INIT_WORK(&pcf->irq_work, pcf50633_irq_worker);
 
        version = pcf50633_reg_read(pcf, 0);
        variant = pcf50633_reg_read(pcf, 1);
        if (version < 0 || variant < 0) {
                dev_err(pcf->dev, "Unable to probe pcf50633\n");
                ret = -ENODEV;
-               goto err_destroy_workqueue;
+               goto err_free;
        }
 
        dev_info(pcf->dev, "Probed device version %d variant %d\n",
                                                        version, variant);
 
-       /* Enable all interrupts except RTC SECOND */
-       pcf->mask_regs[0] = 0x80;
-       pcf50633_reg_write(pcf, PCF50633_REG_INT1M, pcf->mask_regs[0]);
-       pcf50633_reg_write(pcf, PCF50633_REG_INT2M, 0x00);
-       pcf50633_reg_write(pcf, PCF50633_REG_INT3M, 0x00);
-       pcf50633_reg_write(pcf, PCF50633_REG_INT4M, 0x00);
-       pcf50633_reg_write(pcf, PCF50633_REG_INT5M, 0x00);
-
-       ret = request_irq(client->irq, pcf50633_irq,
-                                       IRQF_TRIGGER_LOW, "pcf50633", pcf);
-
-       if (ret) {
-               dev_err(pcf->dev, "Failed to request IRQ %d\n", ret);
-               goto err_destroy_workqueue;
-       }
+       pcf50633_irq_init(pcf, client->irq);
 
        /* Create sub devices */
        pcf50633_client_dev_register(pcf, "pcf50633-input",
@@ -620,6 +305,10 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
                                                &pcf->mbc_pdev);
        pcf50633_client_dev_register(pcf, "pcf50633-adc",
                                                &pcf->adc_pdev);
+       pcf50633_client_dev_register(pcf, "pcf50633-backlight",
+                                               &pcf->bl_pdev);
+       pcf50633_client_dev_register(pcf, "pcf50633-gpio",
+                                               &pcf->gpio_pdev);
 
        for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
                struct platform_device *pdev;
@@ -638,10 +327,6 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
                platform_device_add(pdev);
        }
 
-       if (enable_irq_wake(client->irq) < 0)
-               dev_err(pcf->dev, "IRQ %u cannot be enabled as wake-up source"
-                       "in this hardware revision", client->irq);
-
        ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
        if (ret)
                dev_err(pcf->dev, "error creating sysfs entries\n");
@@ -651,8 +336,6 @@ static int __devinit pcf50633_probe(struct i2c_client *client,
 
        return 0;
 
-err_destroy_workqueue:
-       destroy_workqueue(pcf->work_queue);
 err_free:
        i2c_set_clientdata(client, NULL);
        kfree(pcf);
@@ -665,9 +348,9 @@ static int __devexit pcf50633_remove(struct i2c_client *client)
        struct pcf50633 *pcf = i2c_get_clientdata(client);
        int i;
 
-       free_irq(pcf->irq, pcf);
-       destroy_workqueue(pcf->work_queue);
+       pcf50633_irq_free(pcf);
 
+       platform_device_unregister(pcf->gpio_pdev);
        platform_device_unregister(pcf->input_pdev);
        platform_device_unregister(pcf->rtc_pdev);
        platform_device_unregister(pcf->mbc_pdev);