/*
- * support.c - provides standard pnp functions for the use of pnp protocol drivers,
+ * support.c - standard functions for the use of pnp protocol drivers
*
* Copyright 2003 Adam Belay <ambx1@neo.rr.com>
- *
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/pnp.h>
#include "base.h"
/**
- * pnp_is_active - Determines if a device is active based on its current resources
+ * pnp_is_active - Determines if a device is active based on its current
+ * resources
* @dev: pointer to the desired PnP device
- *
*/
-
-int pnp_is_active(struct pnp_dev * dev)
+int pnp_is_active(struct pnp_dev *dev)
{
if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
!pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
- pnp_irq(dev, 0) == -1 &&
- pnp_dma(dev, 0) == -1)
- return 0;
+ pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1)
+ return 0;
else
return 1;
}
+EXPORT_SYMBOL(pnp_is_active);
+
+/*
+ * Functionally similar to acpi_ex_eisa_id_to_string(), but that's
+ * buried in the ACPI CA, and we can't depend on it being present.
+ */
+void pnp_eisa_id_to_string(u32 id, char *str)
+{
+ id = be32_to_cpu(id);
+
+ /*
+ * According to the specs, the first three characters are five-bit
+ * compressed ASCII, and the left-over high order bit should be zero.
+ * However, the Linux ISAPNP code historically used six bits for the
+ * first character, and there seem to be IDs that depend on that,
+ * e.g., "nEC8241" in the Linux 8250_pnp serial driver and the
+ * FreeBSD sys/pc98/cbus/sio_cbus.c driver.
+ */
+ str[0] = 'A' + ((id >> 26) & 0x3f) - 1;
+ str[1] = 'A' + ((id >> 21) & 0x1f) - 1;
+ str[2] = 'A' + ((id >> 16) & 0x1f) - 1;
+ str[3] = hex_asc_hi(id >> 8);
+ str[4] = hex_asc_lo(id >> 8);
+ str[5] = hex_asc_hi(id);
+ str[6] = hex_asc_lo(id);
+ str[7] = '\0';
+}
+
+void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
+{
+#ifdef DEBUG
+ struct resource *res;
+ int i;
+ dev_dbg(&dev->dev, "current resources: %s\n", desc);
-EXPORT_SYMBOL(pnp_is_active);
+ for (i = 0; i < PNP_MAX_IRQ; i++) {
+ res = pnp_get_resource(dev, IORESOURCE_IRQ, i);
+ if (res && !(res->flags & IORESOURCE_UNSET))
+ dev_dbg(&dev->dev, " irq %lld flags %#lx\n",
+ (unsigned long long) res->start, res->flags);
+ }
+ for (i = 0; i < PNP_MAX_DMA; i++) {
+ res = pnp_get_resource(dev, IORESOURCE_DMA, i);
+ if (res && !(res->flags & IORESOURCE_UNSET))
+ dev_dbg(&dev->dev, " dma %lld flags %#lx\n",
+ (unsigned long long) res->start, res->flags);
+ }
+ for (i = 0; i < PNP_MAX_PORT; i++) {
+ res = pnp_get_resource(dev, IORESOURCE_IO, i);
+ if (res && !(res->flags & IORESOURCE_UNSET))
+ dev_dbg(&dev->dev, " io %#llx-%#llx flags %#lx\n",
+ (unsigned long long) res->start,
+ (unsigned long long) res->end, res->flags);
+ }
+ for (i = 0; i < PNP_MAX_MEM; i++) {
+ res = pnp_get_resource(dev, IORESOURCE_MEM, i);
+ if (res && !(res->flags & IORESOURCE_UNSET))
+ dev_dbg(&dev->dev, " mem %#llx-%#llx flags %#lx\n",
+ (unsigned long long) res->start,
+ (unsigned long long) res->end, res->flags);
+ }
+#endif
+}