vsprintf: use %pR, %pr instead of %pRt, %pRf
[linux-2.6.git] / drivers / pnp / support.c
1 /*
2  * support.c - standard functions for the use of pnp protocol drivers
3  *
4  * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
5  * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
6  *      Bjorn Helgaas <bjorn.helgaas@hp.com>
7  */
8
9 #include <linux/module.h>
10 #include <linux/ctype.h>
11 #include <linux/pnp.h>
12 #include "base.h"
13
14 /**
15  * pnp_is_active - Determines if a device is active based on its current
16  *      resources
17  * @dev: pointer to the desired PnP device
18  */
19 int pnp_is_active(struct pnp_dev *dev)
20 {
21         /*
22          * I don't think this is very reliable because pnp_disable_dev()
23          * only clears out auto-assigned resources.
24          */
25         if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
26             !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
27             pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1)
28                 return 0;
29         else
30                 return 1;
31 }
32
33 EXPORT_SYMBOL(pnp_is_active);
34
35 /*
36  * Functionally similar to acpi_ex_eisa_id_to_string(), but that's
37  * buried in the ACPI CA, and we can't depend on it being present.
38  */
39 void pnp_eisa_id_to_string(u32 id, char *str)
40 {
41         id = be32_to_cpu(id);
42
43         /*
44          * According to the specs, the first three characters are five-bit
45          * compressed ASCII, and the left-over high order bit should be zero.
46          * However, the Linux ISAPNP code historically used six bits for the
47          * first character, and there seem to be IDs that depend on that,
48          * e.g., "nEC8241" in the Linux 8250_pnp serial driver and the
49          * FreeBSD sys/pc98/cbus/sio_cbus.c driver.
50          */
51         str[0] = 'A' + ((id >> 26) & 0x3f) - 1;
52         str[1] = 'A' + ((id >> 21) & 0x1f) - 1;
53         str[2] = 'A' + ((id >> 16) & 0x1f) - 1;
54         str[3] = hex_asc_hi(id >> 8);
55         str[4] = hex_asc_lo(id >> 8);
56         str[5] = hex_asc_hi(id);
57         str[6] = hex_asc_lo(id);
58         str[7] = '\0';
59 }
60
61 char *pnp_resource_type_name(struct resource *res)
62 {
63         switch (pnp_resource_type(res)) {
64         case IORESOURCE_IO:
65                 return "io";
66         case IORESOURCE_MEM:
67                 return "mem";
68         case IORESOURCE_IRQ:
69                 return "irq";
70         case IORESOURCE_DMA:
71                 return "dma";
72         }
73         return NULL;
74 }
75
76 void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
77 {
78         struct pnp_resource *pnp_res;
79
80         if (list_empty(&dev->resources))
81                 pnp_dbg(&dev->dev, "%s: no current resources\n", desc);
82         else {
83                 pnp_dbg(&dev->dev, "%s: current resources:\n", desc);
84                 list_for_each_entry(pnp_res, &dev->resources, list)
85                         pnp_dbg(&dev->dev, "%pr\n", &pnp_res->res);
86         }
87 }
88
89 char *pnp_option_priority_name(struct pnp_option *option)
90 {
91         switch (pnp_option_priority(option)) {
92         case PNP_RES_PRIORITY_PREFERRED:
93                 return "preferred";
94         case PNP_RES_PRIORITY_ACCEPTABLE:
95                 return "acceptable";
96         case PNP_RES_PRIORITY_FUNCTIONAL:
97                 return "functional";
98         }
99         return "invalid";
100 }
101
102 void dbg_pnp_show_option(struct pnp_dev *dev, struct pnp_option *option)
103 {
104         char buf[128];
105         int len = 0, i;
106         struct pnp_port *port;
107         struct pnp_mem *mem;
108         struct pnp_irq *irq;
109         struct pnp_dma *dma;
110
111         if (pnp_option_is_dependent(option))
112                 len += scnprintf(buf + len, sizeof(buf) - len,
113                                  "  dependent set %d (%s) ",
114                                  pnp_option_set(option),
115                                  pnp_option_priority_name(option));
116         else
117                 len += scnprintf(buf + len, sizeof(buf) - len,
118                                  "  independent ");
119
120         switch (option->type) {
121         case IORESOURCE_IO:
122                 port = &option->u.port;
123                 len += scnprintf(buf + len, sizeof(buf) - len, "io  min %#llx "
124                                  "max %#llx align %lld size %lld flags %#x",
125                                  (unsigned long long) port->min,
126                                  (unsigned long long) port->max,
127                                  (unsigned long long) port->align,
128                                  (unsigned long long) port->size, port->flags);
129                 break;
130         case IORESOURCE_MEM:
131                 mem = &option->u.mem;
132                 len += scnprintf(buf + len, sizeof(buf) - len, "mem min %#llx "
133                                  "max %#llx align %lld size %lld flags %#x",
134                                  (unsigned long long) mem->min,
135                                  (unsigned long long) mem->max,
136                                  (unsigned long long) mem->align,
137                                  (unsigned long long) mem->size, mem->flags);
138                 break;
139         case IORESOURCE_IRQ:
140                 irq = &option->u.irq;
141                 len += scnprintf(buf + len, sizeof(buf) - len, "irq");
142                 if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
143                         len += scnprintf(buf + len, sizeof(buf) - len,
144                                          " <none>");
145                 else {
146                         for (i = 0; i < PNP_IRQ_NR; i++)
147                                 if (test_bit(i, irq->map.bits))
148                                         len += scnprintf(buf + len,
149                                                          sizeof(buf) - len,
150                                                          " %d", i);
151                 }
152                 len += scnprintf(buf + len, sizeof(buf) - len, " flags %#x",
153                                  irq->flags);
154                 if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
155                         len += scnprintf(buf + len, sizeof(buf) - len,
156                                          " (optional)");
157                 break;
158         case IORESOURCE_DMA:
159                 dma = &option->u.dma;
160                 len += scnprintf(buf + len, sizeof(buf) - len, "dma");
161                 if (!dma->map)
162                         len += scnprintf(buf + len, sizeof(buf) - len,
163                                          " <none>");
164                 else {
165                         for (i = 0; i < 8; i++)
166                                 if (dma->map & (1 << i))
167                                         len += scnprintf(buf + len,
168                                                          sizeof(buf) - len,
169                                                          " %d", i);
170                 }
171                 len += scnprintf(buf + len, sizeof(buf) - len, " (bitmask %#x) "
172                                  "flags %#x", dma->map, dma->flags);
173                 break;
174         }
175         pnp_dbg(&dev->dev, "%s\n", buf);
176 }