greybus: Merge branch 'master' of github.com:gregkh/greybus
This commit is contained in:
Greg Kroah-Hartman
commit
23bd25a798
@ -13,6 +13,8 @@
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#include <linux/gpio.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/mutex.h>
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#include "greybus.h"
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struct gb_gpio_line {
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@ -22,6 +24,11 @@ struct gb_gpio_line {
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direction: 1, /* 0 = output, 1 = input */
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value: 1; /* 0 = low, 1 = high */
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u16 debounce_usec;
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u8 irq_type;
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bool irq_type_pending;
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bool masked;
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bool masked_pending;
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};
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struct gb_gpio_controller {
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@ -38,6 +45,7 @@ struct gb_gpio_controller {
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unsigned int irq_base;
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irq_flow_handler_t irq_handler;
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unsigned int irq_default_type;
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struct mutex irq_lock;
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};
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#define gpio_chip_to_gb_gpio_controller(chip) \
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container_of(chip, struct gb_gpio_controller, chip)
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@ -211,83 +219,121 @@ static int gb_gpio_set_debounce_operation(struct gb_gpio_controller *ggc,
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return ret;
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}
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static void gb_gpio_ack_irq(struct irq_data *d)
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static void _gb_gpio_irq_mask(struct gb_gpio_controller *ggc, u8 hwirq)
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{
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struct gpio_chip *chip = irq_data_to_gpio_chip(d);
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struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
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struct gb_gpio_irq_ack_request request;
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int ret;
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request.which = d->hwirq;
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ret = gb_operation_sync(ggc->connection,
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GB_GPIO_TYPE_IRQ_ACK,
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&request, sizeof(request), NULL, 0);
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if (ret)
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dev_err(chip->dev, "failed to ack irq: %d\n", ret);
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}
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static void gb_gpio_mask_irq(struct irq_data *d)
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{
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struct gpio_chip *chip = irq_data_to_gpio_chip(d);
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struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
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struct gb_gpio_irq_mask_request request;
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int ret;
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request.which = d->hwirq;
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request.which = hwirq;
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ret = gb_operation_sync(ggc->connection,
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GB_GPIO_TYPE_IRQ_MASK,
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&request, sizeof(request), NULL, 0);
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if (ret)
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dev_err(chip->dev, "failed to mask irq: %d\n", ret);
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dev_err(ggc->chip.dev, "failed to mask irq: %d\n", ret);
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}
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static void gb_gpio_unmask_irq(struct irq_data *d)
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static void _gb_gpio_irq_unmask(struct gb_gpio_controller *ggc, u8 hwirq)
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{
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struct gpio_chip *chip = irq_data_to_gpio_chip(d);
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struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
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struct gb_gpio_irq_unmask_request request;
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int ret;
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request.which = d->hwirq;
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request.which = hwirq;
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ret = gb_operation_sync(ggc->connection,
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GB_GPIO_TYPE_IRQ_UNMASK,
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&request, sizeof(request), NULL, 0);
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if (ret)
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dev_err(chip->dev, "failed to unmask irq: %d\n", ret);
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dev_err(ggc->chip.dev, "failed to unmask irq: %d\n", ret);
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}
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static void _gb_gpio_irq_set_type(struct gb_gpio_controller *ggc,
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u8 hwirq, u8 type)
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{
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struct gb_gpio_irq_type_request request;
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int ret;
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request.which = hwirq;
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request.type = type;
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ret = gb_operation_sync(ggc->connection,
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GB_GPIO_TYPE_IRQ_TYPE,
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&request, sizeof(request), NULL, 0);
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if (ret)
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dev_err(ggc->chip.dev, "failed to set irq type: %d\n", ret);
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}
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static void gb_gpio_irq_mask(struct irq_data *d)
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{
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struct gpio_chip *chip = irq_data_to_gpio_chip(d);
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struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
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struct gb_gpio_line *line = &ggc->lines[d->hwirq];
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line->masked = true;
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line->masked_pending = true;
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}
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static void gb_gpio_irq_unmask(struct irq_data *d)
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{
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struct gpio_chip *chip = irq_data_to_gpio_chip(d);
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struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
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struct gb_gpio_line *line = &ggc->lines[d->hwirq];
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line->masked = false;
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line->masked_pending = true;
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}
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static int gb_gpio_irq_set_type(struct irq_data *d, unsigned int type)
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{
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struct gpio_chip *chip = irq_data_to_gpio_chip(d);
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struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
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struct gb_gpio_irq_type_request request;
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int ret = 0;
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request.which = d->hwirq;
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request.type = type;
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struct gb_gpio_line *line = &ggc->lines[d->hwirq];
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switch (type) {
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case IRQ_TYPE_NONE:
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break;
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case IRQ_TYPE_EDGE_RISING:
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case IRQ_TYPE_EDGE_FALLING:
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case IRQ_TYPE_EDGE_BOTH:
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case IRQ_TYPE_LEVEL_LOW:
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case IRQ_TYPE_LEVEL_HIGH:
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ret = gb_operation_sync(ggc->connection,
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GB_GPIO_TYPE_IRQ_TYPE,
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&request, sizeof(request), NULL, 0);
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if (ret) {
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dev_err(chip->dev, "failed to set irq type: %d\n",
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ret);
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}
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break;
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default:
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dev_err(chip->dev, "unsupported irq type: %u\n", type);
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ret = -EINVAL;
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return -EINVAL;
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}
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return ret;
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line->irq_type = type;
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line->irq_type_pending = true;
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return 0;
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}
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static void gb_gpio_irq_bus_lock(struct irq_data *d)
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{
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struct gpio_chip *chip = irq_data_to_gpio_chip(d);
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struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
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mutex_lock(&ggc->irq_lock);
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}
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static void gb_gpio_irq_bus_sync_unlock(struct irq_data *d)
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{
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struct gpio_chip *chip = irq_data_to_gpio_chip(d);
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struct gb_gpio_controller *ggc = gpio_chip_to_gb_gpio_controller(chip);
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struct gb_gpio_line *line = &ggc->lines[d->hwirq];
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if (line->irq_type_pending) {
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_gb_gpio_irq_set_type(ggc, d->hwirq, line->irq_type);
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line->irq_type_pending = false;
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}
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if (line->masked_pending) {
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if (line->masked)
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_gb_gpio_irq_mask(ggc, d->hwirq);
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else
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_gb_gpio_irq_unmask(ggc, d->hwirq);
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line->masked_pending = false;
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}
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mutex_unlock(&ggc->irq_lock);
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}
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static int gb_gpio_request_recv(u8 type, struct gb_operation *op)
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@ -318,9 +364,9 @@ static int gb_gpio_request_recv(u8 type, struct gb_operation *op)
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return -EINVAL;
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}
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irq = gpio_to_irq(ggc->chip.base + event->which);
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if (irq < 0) {
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dev_err(ggc->chip.dev, "failed to map irq\n");
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irq = irq_find_mapping(ggc->irqdomain, event->which);
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if (!irq) {
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dev_err(ggc->chip.dev, "failed to find IRQ\n");
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return -EINVAL;
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}
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desc = irq_to_desc(irq);
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@ -329,9 +375,8 @@ static int gb_gpio_request_recv(u8 type, struct gb_operation *op)
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return -EINVAL;
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}
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/* Dispatch interrupt */
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local_irq_disable();
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handle_simple_irq(irq, desc);
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generic_handle_irq_desc(irq, desc);
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local_irq_enable();
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return 0;
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@ -414,11 +459,6 @@ static int gb_gpio_set_debounce(struct gpio_chip *chip, unsigned offset,
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return gb_gpio_set_debounce_operation(ggc, (u8)offset, usec);
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}
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static void gb_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
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{
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return; /* XXX */
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}
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static int gb_gpio_controller_setup(struct gb_gpio_controller *ggc)
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{
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int ret;
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@ -596,12 +636,15 @@ static int gb_gpio_connection_init(struct gb_connection *connection)
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goto err_free_controller;
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irqc = &ggc->irqc;
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irqc->irq_ack = gb_gpio_ack_irq;
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irqc->irq_mask = gb_gpio_mask_irq;
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irqc->irq_unmask = gb_gpio_unmask_irq;
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irqc->irq_mask = gb_gpio_irq_mask;
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irqc->irq_unmask = gb_gpio_irq_unmask;
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irqc->irq_set_type = gb_gpio_irq_set_type;
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irqc->irq_bus_lock = gb_gpio_irq_bus_lock;
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irqc->irq_bus_sync_unlock = gb_gpio_irq_bus_sync_unlock;
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irqc->name = "greybus_gpio";
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mutex_init(&ggc->irq_lock);
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gpio = &ggc->chip;
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gpio->label = "greybus_gpio";
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@ -616,7 +659,6 @@ static int gb_gpio_connection_init(struct gb_connection *connection)
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gpio->get = gb_gpio_get;
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gpio->set = gb_gpio_set;
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gpio->set_debounce = gb_gpio_set_debounce;
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gpio->dbg_show = gb_gpio_dbg_show;
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gpio->to_irq = gb_gpio_to_irq;
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gpio->base = -1; /* Allocate base dynamically */
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gpio->ngpio = ggc->line_max + 1;
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@ -630,7 +672,7 @@ static int gb_gpio_connection_init(struct gb_connection *connection)
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}
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ret = gb_gpio_irqchip_add(gpio, irqc, 0,
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handle_simple_irq, IRQ_TYPE_NONE);
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handle_level_irq, IRQ_TYPE_NONE);
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if (ret) {
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dev_err(&connection->dev, "failed to add irq chip: %d\n", ret);
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goto irqchip_err;
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@ -128,7 +128,6 @@ struct gb_i2c_transfer_response {
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#define GB_GPIO_TYPE_SET_VALUE 0x09
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#define GB_GPIO_TYPE_SET_DEBOUNCE 0x0a
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#define GB_GPIO_TYPE_IRQ_TYPE 0x0b
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#define GB_GPIO_TYPE_IRQ_ACK 0x0c
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#define GB_GPIO_TYPE_IRQ_MASK 0x0d
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#define GB_GPIO_TYPE_IRQ_UNMASK 0x0e
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#define GB_GPIO_TYPE_IRQ_EVENT 0x0f
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@ -203,16 +202,11 @@ struct gb_gpio_irq_unmask_request {
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};
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/* irq unmask response has no payload */
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struct gb_gpio_irq_ack_request {
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__u8 which;
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};
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/* irq ack response has no payload */
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/* irq event requests originate on another module and are handled on the AP */
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struct gb_gpio_irq_event_request {
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__u8 which;
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};
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/* irq event response has no payload */
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/* irq event has no response */
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/* PWM */
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@ -686,6 +686,10 @@ int gb_operation_response_send(struct gb_operation *operation, int errno)
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return -EIO; /* Shouldn't happen */
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}
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/* Sender of request does not care about response. */
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if (!operation->id)
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return 0;
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if (!operation->response) {
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if (!gb_operation_response_alloc(operation, 0)) {
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dev_err(&connection->dev,
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