LXR uboot/drivers/misc/irq-uclass.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright 2019 Google, LLC
   4 * Written by Simon Glass <sjg@chromium.org>
   5 */
   6
   7#define LOG_CATEGORY UCLASS_IRQ
   8
   9#include <common.h>
  10#include <dm.h>
  11#include <dt-structs.h>
  12#include <irq.h>
  13#include <log.h>
  14#include <dm/device-internal.h>
  15
  16int irq_route_pmc_gpio_gpe(struct udevice *dev, uint pmc_gpe_num)
  17{
  18        const struct irq_ops *ops = irq_get_ops(dev);
  19
  20        if (!ops->route_pmc_gpio_gpe)
  21                return -ENOSYS;
  22
  23        return ops->route_pmc_gpio_gpe(dev, pmc_gpe_num);
  24}
  25
  26int irq_set_polarity(struct udevice *dev, uint irq, bool active_low)
  27{
  28        const struct irq_ops *ops = irq_get_ops(dev);
  29
  30        if (!ops->set_polarity)
  31                return -ENOSYS;
  32
  33        return ops->set_polarity(dev, irq, active_low);
  34}
  35
  36int irq_snapshot_polarities(struct udevice *dev)
  37{
  38        const struct irq_ops *ops = irq_get_ops(dev);
  39
  40        if (!ops->snapshot_polarities)
  41                return -ENOSYS;
  42
  43        return ops->snapshot_polarities(dev);
  44}
  45
  46int irq_restore_polarities(struct udevice *dev)
  47{
  48        const struct irq_ops *ops = irq_get_ops(dev);
  49
  50        if (!ops->restore_polarities)
  51                return -ENOSYS;
  52
  53        return ops->restore_polarities(dev);
  54}
  55
  56int irq_read_and_clear(struct irq *irq)
  57{
  58        const struct irq_ops *ops = irq_get_ops(irq->dev);
  59
  60        if (!ops->read_and_clear)
  61                return -ENOSYS;
  62
  63        return ops->read_and_clear(irq);
  64}
  65
  66#if CONFIG_IS_ENABLED(OF_PLATDATA)
  67int irq_get_by_phandle(struct udevice *dev, const struct phandle_2_arg *cells,
  68                       struct irq *irq)
  69{
  70        int ret;
  71
  72        ret = device_get_by_ofplat_idx(cells->idx, &irq->dev);
  73        if (ret)
  74                return ret;
  75        irq->id = cells->arg[0];
  76
  77        /*
  78         * Note: we could call irq_of_xlate_default() here to do this properly.
  79         * For now, this is good enough for existing cases.
  80         */
  81        irq->flags = cells->arg[1];
  82
  83        return 0;
  84}
  85#else
  86static int irq_of_xlate_default(struct irq *irq,
  87                                struct ofnode_phandle_args *args)
  88{
  89        log_debug("(irq=%p)\n", irq);
  90
  91        if (args->args_count > 1) {
  92                log_debug("Invalid args_count: %d\n", args->args_count);
  93                return -EINVAL;
  94        }
  95
  96        if (args->args_count)
  97                irq->id = args->args[0];
  98        else
  99                irq->id = 0;
 100
 101        return 0;
 102}
 103
 104static int irq_get_by_index_tail(int ret, ofnode node,
 105                                 struct ofnode_phandle_args *args,
 106                                 const char *list_name, int index,
 107                                 struct irq *irq)
 108{
 109        struct udevice *dev_irq;
 110        const struct irq_ops *ops;
 111
 112        assert(irq);
 113        irq->dev = NULL;
 114        if (ret)
 115                goto err;
 116
 117        ret = uclass_get_device_by_ofnode(UCLASS_IRQ, args->node, &dev_irq);
 118        if (ret) {
 119                log_debug("uclass_get_device_by_ofnode failed: err=%d\n", ret);
 120                return ret;
 121        }
 122
 123        irq->dev = dev_irq;
 124
 125        ops = irq_get_ops(dev_irq);
 126
 127        if (ops->of_xlate)
 128                ret = ops->of_xlate(irq, args);
 129        else
 130                ret = irq_of_xlate_default(irq, args);
 131        if (ret) {
 132                log_debug("of_xlate() failed: %d\n", ret);
 133                return ret;
 134        }
 135
 136        return irq_request(dev_irq, irq);
 137err:
 138        log_debug("Node '%s', property '%s', failed to request IRQ index %d: %d\n",
 139                  ofnode_get_name(node), list_name, index, ret);
 140        return ret;
 141}
 142
 143int irq_get_by_index(struct udevice *dev, int index, struct irq *irq)
 144{
 145        struct ofnode_phandle_args args;
 146        int ret;
 147
 148        ret = dev_read_phandle_with_args(dev, "interrupts-extended",
 149                                         "#interrupt-cells", 0, index, &args);
 150
 151        return irq_get_by_index_tail(ret, dev_ofnode(dev), &args,
 152                                     "interrupts-extended", index > 0, irq);
 153}
 154#endif /* OF_PLATDATA */
 155
 156int irq_request(struct udevice *dev, struct irq *irq)
 157{
 158        const struct irq_ops *ops;
 159
 160        log_debug("(dev=%p, irq=%p)\n", dev, irq);
 161        ops = irq_get_ops(dev);
 162
 163        irq->dev = dev;
 164
 165        if (!ops->request)
 166                return 0;
 167
 168        return ops->request(irq);
 169}
 170
 171int irq_first_device_type(enum irq_dev_t type, struct udevice **devp)
 172{
 173        int ret;
 174
 175        ret = uclass_first_device_drvdata(UCLASS_IRQ, type, devp);
 176        if (ret)
 177                return ret;
 178
 179        return 0;
 180}
 181
 182#if CONFIG_IS_ENABLED(ACPIGEN)
 183int irq_get_acpi(const struct irq *irq, struct acpi_irq *acpi_irq)
 184{
 185        struct irq_ops *ops;
 186
 187        if (!irq_is_valid(irq))
 188                return -EINVAL;
 189
 190        ops = irq_get_ops(irq->dev);
 191        if (!ops->get_acpi)
 192                return -ENOSYS;
 193
 194        return ops->get_acpi(irq, acpi_irq);
 195}
 196#endif
 197
 198UCLASS_DRIVER(irq) = {
 199        .id             = UCLASS_IRQ,
 200        .name           = "irq",
 201};
 202