forked from Minki/linux
819beac380
If the resource list is empty, say that explicitly. Previously, it was confusing because often the heading was followed by zero resource lines, then some "add resource" lines from auto-assignment, so the "add" lines looked like current resources. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Acked-by: Rene Herman <rene.herman@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
120 lines
2.9 KiB
C
120 lines
2.9 KiB
C
/*
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* support.c - standard functions for the use of pnp protocol drivers
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*
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* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
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*/
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#include <linux/module.h>
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#include <linux/ctype.h>
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#include <linux/pnp.h>
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#include "base.h"
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/**
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* pnp_is_active - Determines if a device is active based on its current
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* resources
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* @dev: pointer to the desired PnP device
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*/
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int pnp_is_active(struct pnp_dev *dev)
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{
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/*
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* I don't think this is very reliable because pnp_disable_dev()
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* only clears out auto-assigned resources.
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*/
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if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
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!pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
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pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1)
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return 0;
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else
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return 1;
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}
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EXPORT_SYMBOL(pnp_is_active);
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/*
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* Functionally similar to acpi_ex_eisa_id_to_string(), but that's
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* buried in the ACPI CA, and we can't depend on it being present.
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*/
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void pnp_eisa_id_to_string(u32 id, char *str)
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{
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id = be32_to_cpu(id);
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/*
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* According to the specs, the first three characters are five-bit
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* compressed ASCII, and the left-over high order bit should be zero.
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* However, the Linux ISAPNP code historically used six bits for the
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* first character, and there seem to be IDs that depend on that,
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* e.g., "nEC8241" in the Linux 8250_pnp serial driver and the
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* FreeBSD sys/pc98/cbus/sio_cbus.c driver.
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*/
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str[0] = 'A' + ((id >> 26) & 0x3f) - 1;
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str[1] = 'A' + ((id >> 21) & 0x1f) - 1;
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str[2] = 'A' + ((id >> 16) & 0x1f) - 1;
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str[3] = hex_asc_hi(id >> 8);
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str[4] = hex_asc_lo(id >> 8);
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str[5] = hex_asc_hi(id);
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str[6] = hex_asc_lo(id);
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str[7] = '\0';
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}
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char *pnp_resource_type_name(struct resource *res)
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{
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switch (pnp_resource_type(res)) {
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case IORESOURCE_IO:
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return "io";
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case IORESOURCE_MEM:
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return "mem";
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case IORESOURCE_IRQ:
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return "irq";
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case IORESOURCE_DMA:
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return "dma";
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}
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return NULL;
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}
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void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
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{
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#ifdef DEBUG
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char buf[128];
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int len = 0;
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struct pnp_resource *pnp_res;
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struct resource *res;
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if (list_empty(&dev->resources)) {
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dev_dbg(&dev->dev, "%s: no current resources\n", desc);
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return;
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}
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dev_dbg(&dev->dev, "%s: current resources:\n", desc);
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list_for_each_entry(pnp_res, &dev->resources, list) {
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res = &pnp_res->res;
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len += snprintf(buf + len, sizeof(buf) - len, " %-3s ",
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pnp_resource_type_name(res));
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if (res->flags & IORESOURCE_DISABLED) {
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dev_dbg(&dev->dev, "%sdisabled\n", buf);
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continue;
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}
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switch (pnp_resource_type(res)) {
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case IORESOURCE_IO:
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case IORESOURCE_MEM:
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len += snprintf(buf + len, sizeof(buf) - len,
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"%#llx-%#llx flags %#lx",
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(unsigned long long) res->start,
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(unsigned long long) res->end,
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res->flags);
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break;
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case IORESOURCE_IRQ:
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case IORESOURCE_DMA:
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len += snprintf(buf + len, sizeof(buf) - len,
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"%lld flags %#lx",
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(unsigned long long) res->start,
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res->flags);
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break;
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}
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dev_dbg(&dev->dev, "%s\n", buf);
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}
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#endif
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}
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