Root/drivers/pnp/interface.c

1/*
2 * interface.c - contains everything related to the user interface
3 *
4 * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
5 * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
6 * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
7 * Bjorn Helgaas <bjorn.helgaas@hp.com>
8 */
9
10#include <linux/pnp.h>
11#include <linux/string.h>
12#include <linux/errno.h>
13#include <linux/list.h>
14#include <linux/types.h>
15#include <linux/stat.h>
16#include <linux/ctype.h>
17#include <linux/slab.h>
18#include <linux/mutex.h>
19
20#include <asm/uaccess.h>
21
22#include "base.h"
23
24struct pnp_info_buffer {
25    char *buffer; /* pointer to begin of buffer */
26    char *curr; /* current position in buffer */
27    unsigned long size; /* current size */
28    unsigned long len; /* total length of buffer */
29    int stop; /* stop flag */
30    int error; /* error code */
31};
32
33typedef struct pnp_info_buffer pnp_info_buffer_t;
34
35static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
36{
37    va_list args;
38    int res;
39
40    if (buffer->stop || buffer->error)
41        return 0;
42    va_start(args, fmt);
43    res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
44    va_end(args);
45    if (buffer->size + res >= buffer->len) {
46        buffer->stop = 1;
47        return 0;
48    }
49    buffer->curr += res;
50    buffer->size += res;
51    return res;
52}
53
54static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
55               struct pnp_port *port)
56{
57    pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
58           "%i-bit address decoding\n", space,
59           (unsigned long long) port->min,
60           (unsigned long long) port->max,
61           port->align ? ((unsigned long long) port->align - 1) : 0,
62           (unsigned long long) port->size,
63           port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
64}
65
66static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
67              struct pnp_irq *irq)
68{
69    int first = 1, i;
70
71    pnp_printf(buffer, "%sirq ", space);
72    for (i = 0; i < PNP_IRQ_NR; i++)
73        if (test_bit(i, irq->map.bits)) {
74            if (!first) {
75                pnp_printf(buffer, ",");
76            } else {
77                first = 0;
78            }
79            if (i == 2 || i == 9)
80                pnp_printf(buffer, "2/9");
81            else
82                pnp_printf(buffer, "%i", i);
83        }
84    if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
85        pnp_printf(buffer, "<none>");
86    if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
87        pnp_printf(buffer, " High-Edge");
88    if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
89        pnp_printf(buffer, " Low-Edge");
90    if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
91        pnp_printf(buffer, " High-Level");
92    if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
93        pnp_printf(buffer, " Low-Level");
94    if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
95        pnp_printf(buffer, " (optional)");
96    pnp_printf(buffer, "\n");
97}
98
99static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
100              struct pnp_dma *dma)
101{
102    int first = 1, i;
103    char *s;
104
105    pnp_printf(buffer, "%sdma ", space);
106    for (i = 0; i < 8; i++)
107        if (dma->map & (1 << i)) {
108            if (!first) {
109                pnp_printf(buffer, ",");
110            } else {
111                first = 0;
112            }
113            pnp_printf(buffer, "%i", i);
114        }
115    if (!dma->map)
116        pnp_printf(buffer, "<none>");
117    switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
118    case IORESOURCE_DMA_8BIT:
119        s = "8-bit";
120        break;
121    case IORESOURCE_DMA_8AND16BIT:
122        s = "8-bit&16-bit";
123        break;
124    default:
125        s = "16-bit";
126    }
127    pnp_printf(buffer, " %s", s);
128    if (dma->flags & IORESOURCE_DMA_MASTER)
129        pnp_printf(buffer, " master");
130    if (dma->flags & IORESOURCE_DMA_BYTE)
131        pnp_printf(buffer, " byte-count");
132    if (dma->flags & IORESOURCE_DMA_WORD)
133        pnp_printf(buffer, " word-count");
134    switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
135    case IORESOURCE_DMA_TYPEA:
136        s = "type-A";
137        break;
138    case IORESOURCE_DMA_TYPEB:
139        s = "type-B";
140        break;
141    case IORESOURCE_DMA_TYPEF:
142        s = "type-F";
143        break;
144    default:
145        s = "compatible";
146        break;
147    }
148    pnp_printf(buffer, " %s\n", s);
149}
150
151static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
152              struct pnp_mem *mem)
153{
154    char *s;
155
156    pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
157           space, (unsigned long long) mem->min,
158           (unsigned long long) mem->max,
159           (unsigned long long) mem->align,
160           (unsigned long long) mem->size);
161    if (mem->flags & IORESOURCE_MEM_WRITEABLE)
162        pnp_printf(buffer, ", writeable");
163    if (mem->flags & IORESOURCE_MEM_CACHEABLE)
164        pnp_printf(buffer, ", cacheable");
165    if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
166        pnp_printf(buffer, ", range-length");
167    if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
168        pnp_printf(buffer, ", shadowable");
169    if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
170        pnp_printf(buffer, ", expansion ROM");
171    switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
172    case IORESOURCE_MEM_8BIT:
173        s = "8-bit";
174        break;
175    case IORESOURCE_MEM_8AND16BIT:
176        s = "8-bit&16-bit";
177        break;
178    case IORESOURCE_MEM_32BIT:
179        s = "32-bit";
180        break;
181    default:
182        s = "16-bit";
183    }
184    pnp_printf(buffer, ", %s\n", s);
185}
186
187static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
188                 struct pnp_option *option)
189{
190    switch (option->type) {
191    case IORESOURCE_IO:
192        pnp_print_port(buffer, space, &option->u.port);
193        break;
194    case IORESOURCE_MEM:
195        pnp_print_mem(buffer, space, &option->u.mem);
196        break;
197    case IORESOURCE_IRQ:
198        pnp_print_irq(buffer, space, &option->u.irq);
199        break;
200    case IORESOURCE_DMA:
201        pnp_print_dma(buffer, space, &option->u.dma);
202        break;
203    }
204}
205
206static ssize_t pnp_show_options(struct device *dmdev,
207                struct device_attribute *attr, char *buf)
208{
209    struct pnp_dev *dev = to_pnp_dev(dmdev);
210    pnp_info_buffer_t *buffer;
211    struct pnp_option *option;
212    int ret, dep = 0, set = 0;
213    char *indent;
214
215    buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
216    if (!buffer)
217        return -ENOMEM;
218
219    buffer->len = PAGE_SIZE;
220    buffer->buffer = buf;
221    buffer->curr = buffer->buffer;
222
223    list_for_each_entry(option, &dev->options, list) {
224        if (pnp_option_is_dependent(option)) {
225            indent = " ";
226            if (!dep || pnp_option_set(option) != set) {
227                set = pnp_option_set(option);
228                dep = 1;
229                pnp_printf(buffer, "Dependent: %02i - "
230                       "Priority %s\n", set,
231                       pnp_option_priority_name(option));
232            }
233        } else {
234            dep = 0;
235            indent = "";
236        }
237        pnp_print_option(buffer, indent, option);
238    }
239
240    ret = (buffer->curr - buf);
241    kfree(buffer);
242    return ret;
243}
244
245static ssize_t pnp_show_current_resources(struct device *dmdev,
246                      struct device_attribute *attr,
247                      char *buf)
248{
249    struct pnp_dev *dev = to_pnp_dev(dmdev);
250    pnp_info_buffer_t *buffer;
251    struct pnp_resource *pnp_res;
252    struct resource *res;
253    int ret;
254
255    if (!dev)
256        return -EINVAL;
257
258    buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
259    if (!buffer)
260        return -ENOMEM;
261
262    buffer->len = PAGE_SIZE;
263    buffer->buffer = buf;
264    buffer->curr = buffer->buffer;
265
266    pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
267
268    list_for_each_entry(pnp_res, &dev->resources, list) {
269        res = &pnp_res->res;
270
271        pnp_printf(buffer, pnp_resource_type_name(res));
272
273        if (res->flags & IORESOURCE_DISABLED) {
274            pnp_printf(buffer, " disabled\n");
275            continue;
276        }
277
278        switch (pnp_resource_type(res)) {
279        case IORESOURCE_IO:
280        case IORESOURCE_MEM:
281        case IORESOURCE_BUS:
282            pnp_printf(buffer, " %#llx-%#llx%s\n",
283                   (unsigned long long) res->start,
284                   (unsigned long long) res->end,
285                   res->flags & IORESOURCE_WINDOW ?
286                    " window" : "");
287            break;
288        case IORESOURCE_IRQ:
289        case IORESOURCE_DMA:
290            pnp_printf(buffer, " %lld\n",
291                   (unsigned long long) res->start);
292            break;
293        }
294    }
295
296    ret = (buffer->curr - buf);
297    kfree(buffer);
298    return ret;
299}
300
301static ssize_t pnp_set_current_resources(struct device *dmdev,
302                     struct device_attribute *attr,
303                     const char *ubuf, size_t count)
304{
305    struct pnp_dev *dev = to_pnp_dev(dmdev);
306    char *buf = (void *)ubuf;
307    int retval = 0;
308    resource_size_t start, end;
309
310    if (dev->status & PNP_ATTACHED) {
311        retval = -EBUSY;
312        dev_info(&dev->dev, "in use; can't configure\n");
313        goto done;
314    }
315
316    buf = skip_spaces(buf);
317    if (!strnicmp(buf, "disable", 7)) {
318        retval = pnp_disable_dev(dev);
319        goto done;
320    }
321    if (!strnicmp(buf, "activate", 8)) {
322        retval = pnp_activate_dev(dev);
323        goto done;
324    }
325    if (!strnicmp(buf, "fill", 4)) {
326        if (dev->active)
327            goto done;
328        retval = pnp_auto_config_dev(dev);
329        goto done;
330    }
331    if (!strnicmp(buf, "auto", 4)) {
332        if (dev->active)
333            goto done;
334        pnp_init_resources(dev);
335        retval = pnp_auto_config_dev(dev);
336        goto done;
337    }
338    if (!strnicmp(buf, "clear", 5)) {
339        if (dev->active)
340            goto done;
341        pnp_init_resources(dev);
342        goto done;
343    }
344    if (!strnicmp(buf, "get", 3)) {
345        mutex_lock(&pnp_res_mutex);
346        if (pnp_can_read(dev))
347            dev->protocol->get(dev);
348        mutex_unlock(&pnp_res_mutex);
349        goto done;
350    }
351    if (!strnicmp(buf, "set", 3)) {
352        if (dev->active)
353            goto done;
354        buf += 3;
355        pnp_init_resources(dev);
356        mutex_lock(&pnp_res_mutex);
357        while (1) {
358            buf = skip_spaces(buf);
359            if (!strnicmp(buf, "io", 2)) {
360                buf = skip_spaces(buf + 2);
361                start = simple_strtoul(buf, &buf, 0);
362                buf = skip_spaces(buf);
363                if (*buf == '-') {
364                    buf = skip_spaces(buf + 1);
365                    end = simple_strtoul(buf, &buf, 0);
366                } else
367                    end = start;
368                pnp_add_io_resource(dev, start, end, 0);
369                continue;
370            }
371            if (!strnicmp(buf, "mem", 3)) {
372                buf = skip_spaces(buf + 3);
373                start = simple_strtoul(buf, &buf, 0);
374                buf = skip_spaces(buf);
375                if (*buf == '-') {
376                    buf = skip_spaces(buf + 1);
377                    end = simple_strtoul(buf, &buf, 0);
378                } else
379                    end = start;
380                pnp_add_mem_resource(dev, start, end, 0);
381                continue;
382            }
383            if (!strnicmp(buf, "irq", 3)) {
384                buf = skip_spaces(buf + 3);
385                start = simple_strtoul(buf, &buf, 0);
386                pnp_add_irq_resource(dev, start, 0);
387                continue;
388            }
389            if (!strnicmp(buf, "dma", 3)) {
390                buf = skip_spaces(buf + 3);
391                start = simple_strtoul(buf, &buf, 0);
392                pnp_add_dma_resource(dev, start, 0);
393                continue;
394            }
395            break;
396        }
397        mutex_unlock(&pnp_res_mutex);
398        goto done;
399    }
400
401done:
402    if (retval < 0)
403        return retval;
404    return count;
405}
406
407static ssize_t pnp_show_current_ids(struct device *dmdev,
408                    struct device_attribute *attr, char *buf)
409{
410    char *str = buf;
411    struct pnp_dev *dev = to_pnp_dev(dmdev);
412    struct pnp_id *pos = dev->id;
413
414    while (pos) {
415        str += sprintf(str, "%s\n", pos->id);
416        pos = pos->next;
417    }
418    return (str - buf);
419}
420
421struct device_attribute pnp_interface_attrs[] = {
422    __ATTR(resources, S_IRUGO | S_IWUSR,
423           pnp_show_current_resources,
424           pnp_set_current_resources),
425    __ATTR(options, S_IRUGO, pnp_show_options, NULL),
426    __ATTR(id, S_IRUGO, pnp_show_current_ids, NULL),
427    __ATTR_NULL,
428};
429

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