471 lines
11 KiB
C
471 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* interface.c - contains everything related to the user interface
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*
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* Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
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* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
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* Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
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* Bjorn Helgaas <bjorn.helgaas@hp.com>
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*/
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#include <linux/pnp.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/list.h>
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#include <linux/types.h>
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#include <linux/stat.h>
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#include <linux/ctype.h>
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#include <linux/slab.h>
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#include <linux/mutex.h>
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#include <linux/uaccess.h>
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#include "base.h"
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struct pnp_info_buffer {
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char *buffer; /* pointer to begin of buffer */
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char *curr; /* current position in buffer */
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unsigned long size; /* current size */
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unsigned long len; /* total length of buffer */
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int stop; /* stop flag */
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int error; /* error code */
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};
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typedef struct pnp_info_buffer pnp_info_buffer_t;
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__printf(2, 3)
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static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
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{
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va_list args;
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int res;
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if (buffer->stop || buffer->error)
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return 0;
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va_start(args, fmt);
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res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
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va_end(args);
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if (buffer->size + res >= buffer->len) {
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buffer->stop = 1;
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return 0;
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}
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buffer->curr += res;
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buffer->size += res;
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return res;
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}
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static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
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struct pnp_port *port)
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{
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pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
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"%i-bit address decoding\n", space,
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(unsigned long long) port->min,
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(unsigned long long) port->max,
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port->align ? ((unsigned long long) port->align - 1) : 0,
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(unsigned long long) port->size,
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port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
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}
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static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
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struct pnp_irq *irq)
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{
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int first = 1, i;
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pnp_printf(buffer, "%sirq ", space);
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for (i = 0; i < PNP_IRQ_NR; i++)
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if (test_bit(i, irq->map.bits)) {
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if (!first) {
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pnp_printf(buffer, ",");
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} else {
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first = 0;
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}
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if (i == 2 || i == 9)
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pnp_printf(buffer, "2/9");
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else
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pnp_printf(buffer, "%i", i);
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}
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if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
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pnp_printf(buffer, "<none>");
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if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
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pnp_printf(buffer, " High-Edge");
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if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
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pnp_printf(buffer, " Low-Edge");
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if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
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pnp_printf(buffer, " High-Level");
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if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
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pnp_printf(buffer, " Low-Level");
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if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
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pnp_printf(buffer, " (optional)");
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pnp_printf(buffer, "\n");
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}
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static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
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struct pnp_dma *dma)
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{
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int first = 1, i;
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char *s;
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pnp_printf(buffer, "%sdma ", space);
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for (i = 0; i < 8; i++)
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if (dma->map & (1 << i)) {
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if (!first) {
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pnp_printf(buffer, ",");
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} else {
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first = 0;
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}
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pnp_printf(buffer, "%i", i);
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}
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if (!dma->map)
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pnp_printf(buffer, "<none>");
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switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
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case IORESOURCE_DMA_8BIT:
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s = "8-bit";
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break;
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case IORESOURCE_DMA_8AND16BIT:
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s = "8-bit&16-bit";
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break;
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default:
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s = "16-bit";
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}
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pnp_printf(buffer, " %s", s);
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if (dma->flags & IORESOURCE_DMA_MASTER)
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pnp_printf(buffer, " master");
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if (dma->flags & IORESOURCE_DMA_BYTE)
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pnp_printf(buffer, " byte-count");
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if (dma->flags & IORESOURCE_DMA_WORD)
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pnp_printf(buffer, " word-count");
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switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
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case IORESOURCE_DMA_TYPEA:
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s = "type-A";
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break;
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case IORESOURCE_DMA_TYPEB:
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s = "type-B";
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break;
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case IORESOURCE_DMA_TYPEF:
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s = "type-F";
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break;
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default:
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s = "compatible";
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break;
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}
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pnp_printf(buffer, " %s\n", s);
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}
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static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
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struct pnp_mem *mem)
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{
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char *s;
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pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
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space, (unsigned long long) mem->min,
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(unsigned long long) mem->max,
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(unsigned long long) mem->align,
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(unsigned long long) mem->size);
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if (mem->flags & IORESOURCE_MEM_WRITEABLE)
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pnp_printf(buffer, ", writeable");
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if (mem->flags & IORESOURCE_MEM_CACHEABLE)
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pnp_printf(buffer, ", cacheable");
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if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
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pnp_printf(buffer, ", range-length");
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if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
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pnp_printf(buffer, ", shadowable");
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if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
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pnp_printf(buffer, ", expansion ROM");
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switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
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case IORESOURCE_MEM_8BIT:
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s = "8-bit";
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break;
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case IORESOURCE_MEM_8AND16BIT:
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s = "8-bit&16-bit";
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break;
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case IORESOURCE_MEM_32BIT:
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s = "32-bit";
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break;
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default:
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s = "16-bit";
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}
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pnp_printf(buffer, ", %s\n", s);
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}
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static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
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struct pnp_option *option)
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{
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switch (option->type) {
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case IORESOURCE_IO:
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pnp_print_port(buffer, space, &option->u.port);
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break;
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case IORESOURCE_MEM:
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pnp_print_mem(buffer, space, &option->u.mem);
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break;
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case IORESOURCE_IRQ:
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pnp_print_irq(buffer, space, &option->u.irq);
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break;
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case IORESOURCE_DMA:
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pnp_print_dma(buffer, space, &option->u.dma);
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break;
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}
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}
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static ssize_t options_show(struct device *dmdev, struct device_attribute *attr,
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char *buf)
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{
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struct pnp_dev *dev = to_pnp_dev(dmdev);
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pnp_info_buffer_t *buffer;
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struct pnp_option *option;
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int ret, dep = 0, set = 0;
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char *indent;
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buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
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if (!buffer)
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return -ENOMEM;
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buffer->len = PAGE_SIZE;
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buffer->buffer = buf;
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buffer->curr = buffer->buffer;
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list_for_each_entry(option, &dev->options, list) {
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if (pnp_option_is_dependent(option)) {
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indent = " ";
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if (!dep || pnp_option_set(option) != set) {
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set = pnp_option_set(option);
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dep = 1;
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pnp_printf(buffer, "Dependent: %02i - "
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"Priority %s\n", set,
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pnp_option_priority_name(option));
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}
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} else {
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dep = 0;
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indent = "";
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}
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pnp_print_option(buffer, indent, option);
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}
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ret = (buffer->curr - buf);
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kfree(buffer);
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return ret;
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}
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static DEVICE_ATTR_RO(options);
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static ssize_t resources_show(struct device *dmdev,
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struct device_attribute *attr, char *buf)
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{
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struct pnp_dev *dev = to_pnp_dev(dmdev);
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pnp_info_buffer_t *buffer;
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struct pnp_resource *pnp_res;
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struct resource *res;
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int ret;
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if (!dev)
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return -EINVAL;
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buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
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if (!buffer)
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return -ENOMEM;
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buffer->len = PAGE_SIZE;
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buffer->buffer = buf;
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buffer->curr = buffer->buffer;
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pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
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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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pnp_printf(buffer, pnp_resource_type_name(res));
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if (res->flags & IORESOURCE_DISABLED) {
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pnp_printf(buffer, " disabled\n");
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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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case IORESOURCE_BUS:
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pnp_printf(buffer, " %#llx-%#llx%s\n",
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(unsigned long long) res->start,
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(unsigned long long) res->end,
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res->flags & IORESOURCE_WINDOW ?
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" window" : "");
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break;
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case IORESOURCE_IRQ:
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case IORESOURCE_DMA:
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pnp_printf(buffer, " %lld\n",
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(unsigned long long) res->start);
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break;
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}
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}
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ret = (buffer->curr - buf);
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kfree(buffer);
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return ret;
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}
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static char *pnp_get_resource_value(char *buf,
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unsigned long type,
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resource_size_t *start,
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resource_size_t *end,
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unsigned long *flags)
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{
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if (start)
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*start = 0;
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if (end)
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*end = 0;
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if (flags)
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*flags = 0;
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/* TBD: allow for disabled resources */
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buf = skip_spaces(buf);
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if (start) {
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*start = simple_strtoull(buf, &buf, 0);
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if (end) {
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buf = skip_spaces(buf);
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if (*buf == '-') {
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buf = skip_spaces(buf + 1);
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*end = simple_strtoull(buf, &buf, 0);
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} else
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*end = *start;
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}
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}
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/* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */
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return buf;
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}
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static ssize_t resources_store(struct device *dmdev,
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struct device_attribute *attr, const char *ubuf,
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size_t count)
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{
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struct pnp_dev *dev = to_pnp_dev(dmdev);
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char *buf = (void *)ubuf;
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int retval = 0;
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if (dev->status & PNP_ATTACHED) {
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retval = -EBUSY;
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dev_info(&dev->dev, "in use; can't configure\n");
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goto done;
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}
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buf = skip_spaces(buf);
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if (!strncasecmp(buf, "disable", 7)) {
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retval = pnp_disable_dev(dev);
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goto done;
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}
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if (!strncasecmp(buf, "activate", 8)) {
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retval = pnp_activate_dev(dev);
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goto done;
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}
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if (!strncasecmp(buf, "fill", 4)) {
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if (dev->active)
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goto done;
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retval = pnp_auto_config_dev(dev);
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goto done;
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}
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if (!strncasecmp(buf, "auto", 4)) {
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if (dev->active)
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goto done;
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pnp_init_resources(dev);
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retval = pnp_auto_config_dev(dev);
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goto done;
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}
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if (!strncasecmp(buf, "clear", 5)) {
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if (dev->active)
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goto done;
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pnp_init_resources(dev);
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goto done;
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}
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if (!strncasecmp(buf, "get", 3)) {
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mutex_lock(&pnp_res_mutex);
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if (pnp_can_read(dev))
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dev->protocol->get(dev);
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mutex_unlock(&pnp_res_mutex);
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goto done;
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}
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if (!strncasecmp(buf, "set", 3)) {
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resource_size_t start;
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resource_size_t end;
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unsigned long flags;
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if (dev->active)
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goto done;
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buf += 3;
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pnp_init_resources(dev);
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mutex_lock(&pnp_res_mutex);
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while (1) {
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buf = skip_spaces(buf);
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if (!strncasecmp(buf, "io", 2)) {
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buf = pnp_get_resource_value(buf + 2,
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IORESOURCE_IO,
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&start, &end,
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&flags);
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pnp_add_io_resource(dev, start, end, flags);
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} else if (!strncasecmp(buf, "mem", 3)) {
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buf = pnp_get_resource_value(buf + 3,
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IORESOURCE_MEM,
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&start, &end,
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&flags);
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pnp_add_mem_resource(dev, start, end, flags);
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} else if (!strncasecmp(buf, "irq", 3)) {
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buf = pnp_get_resource_value(buf + 3,
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IORESOURCE_IRQ,
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&start, NULL,
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&flags);
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pnp_add_irq_resource(dev, start, flags);
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} else if (!strncasecmp(buf, "dma", 3)) {
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buf = pnp_get_resource_value(buf + 3,
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IORESOURCE_DMA,
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&start, NULL,
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&flags);
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pnp_add_dma_resource(dev, start, flags);
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} else if (!strncasecmp(buf, "bus", 3)) {
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buf = pnp_get_resource_value(buf + 3,
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IORESOURCE_BUS,
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&start, &end,
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NULL);
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pnp_add_bus_resource(dev, start, end);
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} else
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break;
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}
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mutex_unlock(&pnp_res_mutex);
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goto done;
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}
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done:
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if (retval < 0)
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return retval;
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return count;
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}
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static DEVICE_ATTR_RW(resources);
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static ssize_t id_show(struct device *dmdev, struct device_attribute *attr,
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char *buf)
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{
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char *str = buf;
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struct pnp_dev *dev = to_pnp_dev(dmdev);
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struct pnp_id *pos = dev->id;
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while (pos) {
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str += sprintf(str, "%s\n", pos->id);
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pos = pos->next;
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}
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return (str - buf);
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}
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static DEVICE_ATTR_RO(id);
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static struct attribute *pnp_dev_attrs[] = {
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&dev_attr_resources.attr,
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&dev_attr_options.attr,
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&dev_attr_id.attr,
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NULL,
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};
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static const struct attribute_group pnp_dev_group = {
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.attrs = pnp_dev_attrs,
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};
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const struct attribute_group *pnp_dev_groups[] = {
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&pnp_dev_group,
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NULL,
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};
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