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-rw-r--r--drivers/pnp/interface.c470
1 files changed, 470 insertions, 0 deletions
diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c
new file mode 100644
index 0000000000..44efcdb87e
--- /dev/null
+++ b/drivers/pnp/interface.c
@@ -0,0 +1,470 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * interface.c - contains everything related to the user interface
+ *
+ * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/pnp.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+
+#include <linux/uaccess.h>
+
+#include "base.h"
+
+struct pnp_info_buffer {
+ char *buffer; /* pointer to begin of buffer */
+ char *curr; /* current position in buffer */
+ unsigned long size; /* current size */
+ unsigned long len; /* total length of buffer */
+ int stop; /* stop flag */
+ int error; /* error code */
+};
+
+typedef struct pnp_info_buffer pnp_info_buffer_t;
+
+__printf(2, 3)
+static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
+{
+ va_list args;
+ int res;
+
+ if (buffer->stop || buffer->error)
+ return 0;
+ va_start(args, fmt);
+ res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
+ va_end(args);
+ if (buffer->size + res >= buffer->len) {
+ buffer->stop = 1;
+ return 0;
+ }
+ buffer->curr += res;
+ buffer->size += res;
+ return res;
+}
+
+static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_port *port)
+{
+ pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
+ "%i-bit address decoding\n", space,
+ (unsigned long long) port->min,
+ (unsigned long long) port->max,
+ port->align ? ((unsigned long long) port->align - 1) : 0,
+ (unsigned long long) port->size,
+ port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
+}
+
+static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_irq *irq)
+{
+ int first = 1, i;
+
+ pnp_printf(buffer, "%sirq ", space);
+ for (i = 0; i < PNP_IRQ_NR; i++)
+ if (test_bit(i, irq->map.bits)) {
+ if (!first) {
+ pnp_printf(buffer, ",");
+ } else {
+ first = 0;
+ }
+ if (i == 2 || i == 9)
+ pnp_printf(buffer, "2/9");
+ else
+ pnp_printf(buffer, "%i", i);
+ }
+ if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
+ pnp_printf(buffer, "<none>");
+ if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
+ pnp_printf(buffer, " High-Edge");
+ if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
+ pnp_printf(buffer, " Low-Edge");
+ if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
+ pnp_printf(buffer, " High-Level");
+ if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
+ pnp_printf(buffer, " Low-Level");
+ if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
+ pnp_printf(buffer, " (optional)");
+ pnp_printf(buffer, "\n");
+}
+
+static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_dma *dma)
+{
+ int first = 1, i;
+ char *s;
+
+ pnp_printf(buffer, "%sdma ", space);
+ for (i = 0; i < 8; i++)
+ if (dma->map & (1 << i)) {
+ if (!first) {
+ pnp_printf(buffer, ",");
+ } else {
+ first = 0;
+ }
+ pnp_printf(buffer, "%i", i);
+ }
+ if (!dma->map)
+ pnp_printf(buffer, "<none>");
+ switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
+ case IORESOURCE_DMA_8BIT:
+ s = "8-bit";
+ break;
+ case IORESOURCE_DMA_8AND16BIT:
+ s = "8-bit&16-bit";
+ break;
+ default:
+ s = "16-bit";
+ }
+ pnp_printf(buffer, " %s", s);
+ if (dma->flags & IORESOURCE_DMA_MASTER)
+ pnp_printf(buffer, " master");
+ if (dma->flags & IORESOURCE_DMA_BYTE)
+ pnp_printf(buffer, " byte-count");
+ if (dma->flags & IORESOURCE_DMA_WORD)
+ pnp_printf(buffer, " word-count");
+ switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
+ case IORESOURCE_DMA_TYPEA:
+ s = "type-A";
+ break;
+ case IORESOURCE_DMA_TYPEB:
+ s = "type-B";
+ break;
+ case IORESOURCE_DMA_TYPEF:
+ s = "type-F";
+ break;
+ default:
+ s = "compatible";
+ break;
+ }
+ pnp_printf(buffer, " %s\n", s);
+}
+
+static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_mem *mem)
+{
+ char *s;
+
+ pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
+ space, (unsigned long long) mem->min,
+ (unsigned long long) mem->max,
+ (unsigned long long) mem->align,
+ (unsigned long long) mem->size);
+ if (mem->flags & IORESOURCE_MEM_WRITEABLE)
+ pnp_printf(buffer, ", writeable");
+ if (mem->flags & IORESOURCE_MEM_CACHEABLE)
+ pnp_printf(buffer, ", cacheable");
+ if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
+ pnp_printf(buffer, ", range-length");
+ if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
+ pnp_printf(buffer, ", shadowable");
+ if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
+ pnp_printf(buffer, ", expansion ROM");
+ switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
+ case IORESOURCE_MEM_8BIT:
+ s = "8-bit";
+ break;
+ case IORESOURCE_MEM_8AND16BIT:
+ s = "8-bit&16-bit";
+ break;
+ case IORESOURCE_MEM_32BIT:
+ s = "32-bit";
+ break;
+ default:
+ s = "16-bit";
+ }
+ pnp_printf(buffer, ", %s\n", s);
+}
+
+static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_option *option)
+{
+ switch (option->type) {
+ case IORESOURCE_IO:
+ pnp_print_port(buffer, space, &option->u.port);
+ break;
+ case IORESOURCE_MEM:
+ pnp_print_mem(buffer, space, &option->u.mem);
+ break;
+ case IORESOURCE_IRQ:
+ pnp_print_irq(buffer, space, &option->u.irq);
+ break;
+ case IORESOURCE_DMA:
+ pnp_print_dma(buffer, space, &option->u.dma);
+ break;
+ }
+}
+
+static ssize_t options_show(struct device *dmdev, struct device_attribute *attr,
+ char *buf)
+{
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+ pnp_info_buffer_t *buffer;
+ struct pnp_option *option;
+ int ret, dep = 0, set = 0;
+ char *indent;
+
+ buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ buffer->len = PAGE_SIZE;
+ buffer->buffer = buf;
+ buffer->curr = buffer->buffer;
+
+ list_for_each_entry(option, &dev->options, list) {
+ if (pnp_option_is_dependent(option)) {
+ indent = " ";
+ if (!dep || pnp_option_set(option) != set) {
+ set = pnp_option_set(option);
+ dep = 1;
+ pnp_printf(buffer, "Dependent: %02i - "
+ "Priority %s\n", set,
+ pnp_option_priority_name(option));
+ }
+ } else {
+ dep = 0;
+ indent = "";
+ }
+ pnp_print_option(buffer, indent, option);
+ }
+
+ ret = (buffer->curr - buf);
+ kfree(buffer);
+ return ret;
+}
+static DEVICE_ATTR_RO(options);
+
+static ssize_t resources_show(struct device *dmdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+ pnp_info_buffer_t *buffer;
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+ int ret;
+
+ if (!dev)
+ return -EINVAL;
+
+ buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ buffer->len = PAGE_SIZE;
+ buffer->buffer = buf;
+ buffer->curr = buffer->buffer;
+
+ pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
+
+ list_for_each_entry(pnp_res, &dev->resources, list) {
+ res = &pnp_res->res;
+
+ pnp_printf(buffer, pnp_resource_type_name(res));
+
+ if (res->flags & IORESOURCE_DISABLED) {
+ pnp_printf(buffer, " disabled\n");
+ continue;
+ }
+
+ switch (pnp_resource_type(res)) {
+ case IORESOURCE_IO:
+ case IORESOURCE_MEM:
+ case IORESOURCE_BUS:
+ pnp_printf(buffer, " %#llx-%#llx%s\n",
+ (unsigned long long) res->start,
+ (unsigned long long) res->end,
+ res->flags & IORESOURCE_WINDOW ?
+ " window" : "");
+ break;
+ case IORESOURCE_IRQ:
+ case IORESOURCE_DMA:
+ pnp_printf(buffer, " %lld\n",
+ (unsigned long long) res->start);
+ break;
+ }
+ }
+
+ ret = (buffer->curr - buf);
+ kfree(buffer);
+ return ret;
+}
+
+static char *pnp_get_resource_value(char *buf,
+ unsigned long type,
+ resource_size_t *start,
+ resource_size_t *end,
+ unsigned long *flags)
+{
+ if (start)
+ *start = 0;
+ if (end)
+ *end = 0;
+ if (flags)
+ *flags = 0;
+
+ /* TBD: allow for disabled resources */
+
+ buf = skip_spaces(buf);
+ if (start) {
+ *start = simple_strtoull(buf, &buf, 0);
+ if (end) {
+ buf = skip_spaces(buf);
+ if (*buf == '-') {
+ buf = skip_spaces(buf + 1);
+ *end = simple_strtoull(buf, &buf, 0);
+ } else
+ *end = *start;
+ }
+ }
+
+ /* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */
+
+ return buf;
+}
+
+static ssize_t resources_store(struct device *dmdev,
+ struct device_attribute *attr, const char *ubuf,
+ size_t count)
+{
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+ char *buf = (void *)ubuf;
+ int retval = 0;
+
+ if (dev->status & PNP_ATTACHED) {
+ retval = -EBUSY;
+ dev_info(&dev->dev, "in use; can't configure\n");
+ goto done;
+ }
+
+ buf = skip_spaces(buf);
+ if (!strncasecmp(buf, "disable", 7)) {
+ retval = pnp_disable_dev(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "activate", 8)) {
+ retval = pnp_activate_dev(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "fill", 4)) {
+ if (dev->active)
+ goto done;
+ retval = pnp_auto_config_dev(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "auto", 4)) {
+ if (dev->active)
+ goto done;
+ pnp_init_resources(dev);
+ retval = pnp_auto_config_dev(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "clear", 5)) {
+ if (dev->active)
+ goto done;
+ pnp_init_resources(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "get", 3)) {
+ mutex_lock(&pnp_res_mutex);
+ if (pnp_can_read(dev))
+ dev->protocol->get(dev);
+ mutex_unlock(&pnp_res_mutex);
+ goto done;
+ }
+ if (!strncasecmp(buf, "set", 3)) {
+ resource_size_t start;
+ resource_size_t end;
+ unsigned long flags;
+
+ if (dev->active)
+ goto done;
+ buf += 3;
+ pnp_init_resources(dev);
+ mutex_lock(&pnp_res_mutex);
+ while (1) {
+ buf = skip_spaces(buf);
+ if (!strncasecmp(buf, "io", 2)) {
+ buf = pnp_get_resource_value(buf + 2,
+ IORESOURCE_IO,
+ &start, &end,
+ &flags);
+ pnp_add_io_resource(dev, start, end, flags);
+ } else if (!strncasecmp(buf, "mem", 3)) {
+ buf = pnp_get_resource_value(buf + 3,
+ IORESOURCE_MEM,
+ &start, &end,
+ &flags);
+ pnp_add_mem_resource(dev, start, end, flags);
+ } else if (!strncasecmp(buf, "irq", 3)) {
+ buf = pnp_get_resource_value(buf + 3,
+ IORESOURCE_IRQ,
+ &start, NULL,
+ &flags);
+ pnp_add_irq_resource(dev, start, flags);
+ } else if (!strncasecmp(buf, "dma", 3)) {
+ buf = pnp_get_resource_value(buf + 3,
+ IORESOURCE_DMA,
+ &start, NULL,
+ &flags);
+ pnp_add_dma_resource(dev, start, flags);
+ } else if (!strncasecmp(buf, "bus", 3)) {
+ buf = pnp_get_resource_value(buf + 3,
+ IORESOURCE_BUS,
+ &start, &end,
+ NULL);
+ pnp_add_bus_resource(dev, start, end);
+ } else
+ break;
+ }
+ mutex_unlock(&pnp_res_mutex);
+ goto done;
+ }
+
+done:
+ if (retval < 0)
+ return retval;
+ return count;
+}
+static DEVICE_ATTR_RW(resources);
+
+static ssize_t id_show(struct device *dmdev, struct device_attribute *attr,
+ char *buf)
+{
+ char *str = buf;
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+ struct pnp_id *pos = dev->id;
+
+ while (pos) {
+ str += sprintf(str, "%s\n", pos->id);
+ pos = pos->next;
+ }
+ return (str - buf);
+}
+static DEVICE_ATTR_RO(id);
+
+static struct attribute *pnp_dev_attrs[] = {
+ &dev_attr_resources.attr,
+ &dev_attr_options.attr,
+ &dev_attr_id.attr,
+ NULL,
+};
+
+static const struct attribute_group pnp_dev_group = {
+ .attrs = pnp_dev_attrs,
+};
+
+const struct attribute_group *pnp_dev_groups[] = {
+ &pnp_dev_group,
+ NULL,
+};