static void pm8901_irq_unmask(unsigned int irq)
{
int master, irq_bit;
struct pm8901_chip *chip = get_irq_data(irq);
u8 block, config, old_irqs_allowed, old_blocks_allowed;
irq -= chip->pdata.irq_base;
block = irq / 8;
master = block / 8;
irq_bit = irq % 8;
old_irqs_allowed = chip->irqs_allowed[block];
chip->irqs_allowed[block] |= 1 << irq_bit;
if (!old_irqs_allowed) {
master = block / 8;
old_blocks_allowed = chip->blocks_allowed[master];
chip->blocks_allowed[master] |= 1 << (block % 8);
if (!old_blocks_allowed)
chip->masters_allowed |= 1 << master;
}
config = PM8901_IRQF_WRITE | chip->config[irq];
pm8901_config_irq(chip, &block, &config);
}
static void pm8901_irq_ack(unsigned int irq)
{
struct pm8901_chip *chip = get_irq_data(irq);
u8 block, config;
irq -= chip->pdata.irq_base;
block = irq / 8;
config = PM8901_IRQF_WRITE | chip->config[irq] | PM8901_IRQF_CLR;
pm8901_config_irq(chip, &block, &config);
}
static void pm8901_irq_ack(struct irq_data *d)
{
struct pm8901_chip *chip = irq_data_get_irq_handler_data(d);
u8 block, config;
unsigned int irq = d->irq;
irq -= chip->pdata.irq_base;
block = irq / 8;
config = PM8901_IRQF_WRITE | chip->config[irq] | PM8901_IRQF_CLR;
pm8901_config_irq(chip, &block, &config);
}
static int pm8901_irq_set_type(struct irq_data *d, unsigned int flow_type)
{
int master, irq_bit;
struct pm8901_chip *chip = irq_data_get_irq_handler_data(d);
u8 block, config;
unsigned int irq = d->irq;
irq -= chip->pdata.irq_base;
if (irq > chip->pm_max_irq) {
chip->pm_max_irq = irq;
chip->pm_max_blocks =
chip->pm_max_irq / 8 + 1;
chip->pm_max_masters =
chip->pm_max_blocks / 8 + 1;
}
block = irq / 8;
master = block / 8;
irq_bit = irq % 8;
chip->config[irq] = (irq_bit << PM8901_IRQF_BITS_SHIFT) |
PM8901_IRQF_MASK_RE | PM8901_IRQF_MASK_FE;
if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
if (flow_type & IRQF_TRIGGER_RISING)
chip->config[irq] &= ~PM8901_IRQF_MASK_RE;
if (flow_type & IRQF_TRIGGER_FALLING)
chip->config[irq] &= ~PM8901_IRQF_MASK_FE;
} else {
chip->config[irq] |= PM8901_IRQF_LVL_SEL;
if (flow_type & IRQF_TRIGGER_HIGH)
chip->config[irq] &= ~PM8901_IRQF_MASK_RE;
else
chip->config[irq] &= ~PM8901_IRQF_MASK_FE;
}
config = PM8901_IRQF_WRITE | chip->config[irq] | PM8901_IRQF_CLR;
return pm8901_config_irq(chip, &block, &config);
}
static void pm8901_irq_mask(unsigned int irq)
{
int master, irq_bit;
struct pm8901_chip *chip = get_irq_data(irq);
u8 block, config;
irq -= chip->pdata.irq_base;
block = irq / 8;
master = block / 8;
irq_bit = irq % 8;
chip->irqs_allowed[block] &= ~(1 << irq_bit);
if (!chip->irqs_allowed[block]) {
chip->blocks_allowed[master] &= ~(1 << (block % 8));
if (!chip->blocks_allowed[master])
chip->masters_allowed &= ~(1 << master);
}
config = PM8901_IRQF_WRITE | chip->config[irq] |
PM8901_IRQF_MASK_FE | PM8901_IRQF_MASK_RE;
pm8901_config_irq(chip, &block, &config);
}
static irqreturn_t pm8901_isr_thread(int irq_requested, void *data)
{
struct pm8901_chip *chip = data;
int i, j, k;
u8 root, block, config, bits;
u8 blocks[MAX_PM_MASTERS];
int masters = 0, irq, handled = 0, spurious = 0;
u16 irqs_to_handle[MAX_PM_IRQ];
unsigned long irqsave;
spin_lock_irqsave(&chip->pm_lock, irqsave);
/* Read root for masters */
if (pm8901_read_root(chip, &root))
goto bail_out;
masters = root >> 1;
if (!(masters & chip->masters_allowed) ||
(masters & ~chip->masters_allowed)) {
spurious = 1000000;
}
/* Read allowed masters for blocks. */
for (i = 0; i < chip->pm_max_masters; i++) {
if (masters & (1 << i)) {
if (pm8901_read_master(chip, i, &blocks[i]))
goto bail_out;
if (!blocks[i]) {
if (pm8901_can_print())
pr_err("%s: Spurious master: %d "
"(blocks=0)", __func__, i);
spurious += 10000;
}
} else
blocks[i] = 0;
}
/* Select block, read status and call isr */
for (i = 0; i < chip->pm_max_masters; i++) {
if (!blocks[i])
continue;
for (j = 0; j < 8; j++) {
if (!(blocks[i] & (1 << j)))
continue;
block = i * 8 + j; /* block # */
if (pm8901_read_block(chip, &block, &bits))
goto bail_out;
if (!bits) {
if (pm8901_can_print())
pr_err("%s: Spurious block: "
"[master, block]=[%d, %d] "
"(bits=0)\n", __func__, i, j);
spurious += 100;
continue;
}
/* Check IRQ bits */
for (k = 0; k < 8; k++) {
if (!(bits & (1 << k)))
continue;
/* Check spurious interrupts */
if (((1 << i) & chip->masters_allowed) &&
(blocks[i] & chip->blocks_allowed[i]) &&
(bits & chip->irqs_allowed[block])) {
/* Found one */
irq = block * 8 + k;
irqs_to_handle[handled] = irq +
chip->pdata.irq_base;
handled++;
} else {
/* Clear and mask wrong one */
config = PM8901_IRQF_W_C_M |
(k < PM8901_IRQF_BITS_SHIFT);
pm8901_config_irq(chip,
&block, &config);
if (pm8901_can_print())
pr_err("%s: Spurious IRQ: "
"[master, block, bit]="
"[%d, %d (%d), %d]\n",
__func__,
i, j, block, k);
spurious++;
}
}
}
}
bail_out:
spin_unlock_irqrestore(&chip->pm_lock, irqsave);
for (i = 0; i < handled; i++)
generic_handle_irq(irqs_to_handle[i]);
if (spurious) {
if (!pm8901_can_print())
return IRQ_HANDLED;
pr_err("%s: spurious = %d (handled = %d)\n",
__func__, spurious, handled);
pr_err(" root = 0x%x (masters_allowed<<1 = 0x%x)\n",
root, chip->masters_allowed << 1);
for (i = 0; i < chip->pm_max_masters; i++) {
if (masters & (1 << i))
pr_err(" blocks[%d]=0x%x, "
"allowed[%d]=0x%x\n",
i, blocks[i],
i, chip->blocks_allowed[i]);
}
}
return IRQ_HANDLED;
}
