2 * support.c - standard functions for the use of pnp protocol drivers
4 * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
7 #include <linux/module.h>
8 #include <linux/ctype.h>
13 * pnp_is_active - Determines if a device is active based on its current
15 * @dev: pointer to the desired PnP device
17 int pnp_is_active(struct pnp_dev *dev)
20 * I don't think this is very reliable because pnp_disable_dev()
21 * only clears out auto-assigned resources.
23 if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
24 !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
25 pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1)
31 EXPORT_SYMBOL(pnp_is_active);
34 * Functionally similar to acpi_ex_eisa_id_to_string(), but that's
35 * buried in the ACPI CA, and we can't depend on it being present.
37 void pnp_eisa_id_to_string(u32 id, char *str)
42 * According to the specs, the first three characters are five-bit
43 * compressed ASCII, and the left-over high order bit should be zero.
44 * However, the Linux ISAPNP code historically used six bits for the
45 * first character, and there seem to be IDs that depend on that,
46 * e.g., "nEC8241" in the Linux 8250_pnp serial driver and the
47 * FreeBSD sys/pc98/cbus/sio_cbus.c driver.
49 str[0] = 'A' + ((id >> 26) & 0x3f) - 1;
50 str[1] = 'A' + ((id >> 21) & 0x1f) - 1;
51 str[2] = 'A' + ((id >> 16) & 0x1f) - 1;
52 str[3] = hex_asc_hi(id >> 8);
53 str[4] = hex_asc_lo(id >> 8);
54 str[5] = hex_asc_hi(id);
55 str[6] = hex_asc_lo(id);
59 char *pnp_resource_type_name(struct resource *res)
61 switch (pnp_resource_type(res)) {
74 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
79 struct pnp_resource *pnp_res;
82 dev_dbg(&dev->dev, "current resources: %s\n", desc);
83 list_for_each_entry(pnp_res, &dev->resources, list) {
86 len += snprintf(buf + len, sizeof(buf) - len, " %-3s ",
87 pnp_resource_type_name(res));
89 if (res->flags & IORESOURCE_DISABLED) {
90 dev_dbg(&dev->dev, "%sdisabled\n", buf);
94 switch (pnp_resource_type(res)) {
97 len += snprintf(buf + len, sizeof(buf) - len,
98 "%#llx-%#llx flags %#lx",
99 (unsigned long long) res->start,
100 (unsigned long long) res->end,
105 len += snprintf(buf + len, sizeof(buf) - len,
107 (unsigned long long) res->start,
111 dev_dbg(&dev->dev, "%s\n", buf);