1*d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
249b1153aSDominik Brodowski /*
349b1153aSDominik Brodowski * rsrc_iodyn.c -- Resource management routines for MEM-static sockets.
449b1153aSDominik Brodowski *
549b1153aSDominik Brodowski * The initial developer of the original code is David A. Hinds
649b1153aSDominik Brodowski * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
749b1153aSDominik Brodowski * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
849b1153aSDominik Brodowski *
949b1153aSDominik Brodowski * (C) 1999 David A. Hinds
1049b1153aSDominik Brodowski */
1149b1153aSDominik Brodowski
126d59622eSTejun Heo #include <linux/slab.h>
1349b1153aSDominik Brodowski #include <linux/module.h>
1449b1153aSDominik Brodowski #include <linux/kernel.h>
1549b1153aSDominik Brodowski
1649b1153aSDominik Brodowski #include <pcmcia/ss.h>
1749b1153aSDominik Brodowski #include <pcmcia/cistpl.h>
1849b1153aSDominik Brodowski #include "cs_internal.h"
1949b1153aSDominik Brodowski
2049b1153aSDominik Brodowski
2149b1153aSDominik Brodowski struct pcmcia_align_data {
2249b1153aSDominik Brodowski unsigned long mask;
2349b1153aSDominik Brodowski unsigned long offset;
2449b1153aSDominik Brodowski };
2549b1153aSDominik Brodowski
pcmcia_align(void * align_data,const struct resource * res,resource_size_t size,resource_size_t align)2649b1153aSDominik Brodowski static resource_size_t pcmcia_align(void *align_data,
2749b1153aSDominik Brodowski const struct resource *res,
2849b1153aSDominik Brodowski resource_size_t size, resource_size_t align)
2949b1153aSDominik Brodowski {
3049b1153aSDominik Brodowski struct pcmcia_align_data *data = align_data;
3149b1153aSDominik Brodowski resource_size_t start;
3249b1153aSDominik Brodowski
3349b1153aSDominik Brodowski start = (res->start & ~data->mask) + data->offset;
3449b1153aSDominik Brodowski if (start < res->start)
3549b1153aSDominik Brodowski start += data->mask + 1;
3649b1153aSDominik Brodowski
3749b1153aSDominik Brodowski #ifdef CONFIG_X86
3849b1153aSDominik Brodowski if (res->flags & IORESOURCE_IO) {
3949b1153aSDominik Brodowski if (start & 0x300)
4049b1153aSDominik Brodowski start = (start + 0x3ff) & ~0x3ff;
4149b1153aSDominik Brodowski }
4249b1153aSDominik Brodowski #endif
4349b1153aSDominik Brodowski
4449b1153aSDominik Brodowski #ifdef CONFIG_M68K
4549b1153aSDominik Brodowski if (res->flags & IORESOURCE_IO) {
4649b1153aSDominik Brodowski if ((res->start + size - 1) >= 1024)
4749b1153aSDominik Brodowski start = res->end;
4849b1153aSDominik Brodowski }
4949b1153aSDominik Brodowski #endif
5049b1153aSDominik Brodowski
5149b1153aSDominik Brodowski return start;
5249b1153aSDominik Brodowski }
5349b1153aSDominik Brodowski
5449b1153aSDominik Brodowski
__iodyn_find_io_region(struct pcmcia_socket * s,unsigned long base,int num,unsigned long align)55b19a7275SDominik Brodowski static struct resource *__iodyn_find_io_region(struct pcmcia_socket *s,
56b19a7275SDominik Brodowski unsigned long base, int num,
57b19a7275SDominik Brodowski unsigned long align)
5849b1153aSDominik Brodowski {
5949b1153aSDominik Brodowski struct resource *res = pcmcia_make_resource(0, num, IORESOURCE_IO,
6049b1153aSDominik Brodowski dev_name(&s->dev));
6149b1153aSDominik Brodowski struct pcmcia_align_data data;
6249b1153aSDominik Brodowski unsigned long min = base;
6349b1153aSDominik Brodowski int ret;
6449b1153aSDominik Brodowski
6549b1153aSDominik Brodowski data.mask = align - 1;
6649b1153aSDominik Brodowski data.offset = base & data.mask;
6749b1153aSDominik Brodowski
6849b1153aSDominik Brodowski #ifdef CONFIG_PCI
6949b1153aSDominik Brodowski if (s->cb_dev) {
7049b1153aSDominik Brodowski ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
7149b1153aSDominik Brodowski min, 0, pcmcia_align, &data);
7249b1153aSDominik Brodowski } else
7349b1153aSDominik Brodowski #endif
7449b1153aSDominik Brodowski ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
7549b1153aSDominik Brodowski 1, pcmcia_align, &data);
7649b1153aSDominik Brodowski
7749b1153aSDominik Brodowski if (ret != 0) {
7849b1153aSDominik Brodowski kfree(res);
7949b1153aSDominik Brodowski res = NULL;
8049b1153aSDominik Brodowski }
8149b1153aSDominik Brodowski return res;
8249b1153aSDominik Brodowski }
8349b1153aSDominik Brodowski
iodyn_find_io(struct pcmcia_socket * s,unsigned int attr,unsigned int * base,unsigned int num,unsigned int align,struct resource ** parent)84b19a7275SDominik Brodowski static int iodyn_find_io(struct pcmcia_socket *s, unsigned int attr,
85b19a7275SDominik Brodowski unsigned int *base, unsigned int num,
86ad0c7be2SDominik Brodowski unsigned int align, struct resource **parent)
87b19a7275SDominik Brodowski {
88b19a7275SDominik Brodowski int i, ret = 0;
89b19a7275SDominik Brodowski
90b19a7275SDominik Brodowski /* Check for an already-allocated window that must conflict with
91b19a7275SDominik Brodowski * what was asked for. It is a hack because it does not catch all
92b19a7275SDominik Brodowski * potential conflicts, just the most obvious ones.
93b19a7275SDominik Brodowski */
94b19a7275SDominik Brodowski for (i = 0; i < MAX_IO_WIN; i++) {
95b19a7275SDominik Brodowski if (!s->io[i].res)
96b19a7275SDominik Brodowski continue;
97b19a7275SDominik Brodowski
98b19a7275SDominik Brodowski if (!*base)
99b19a7275SDominik Brodowski continue;
100b19a7275SDominik Brodowski
101b19a7275SDominik Brodowski if ((s->io[i].res->start & (align-1)) == *base)
102b19a7275SDominik Brodowski return -EBUSY;
103b19a7275SDominik Brodowski }
104b19a7275SDominik Brodowski
105b19a7275SDominik Brodowski for (i = 0; i < MAX_IO_WIN; i++) {
106b19a7275SDominik Brodowski struct resource *res = s->io[i].res;
107b19a7275SDominik Brodowski unsigned int try;
108b19a7275SDominik Brodowski
109b19a7275SDominik Brodowski if (res && (res->flags & IORESOURCE_BITS) !=
110b19a7275SDominik Brodowski (attr & IORESOURCE_BITS))
111b19a7275SDominik Brodowski continue;
112b19a7275SDominik Brodowski
113b19a7275SDominik Brodowski if (!res) {
114b19a7275SDominik Brodowski if (align == 0)
115b19a7275SDominik Brodowski align = 0x10000;
116b19a7275SDominik Brodowski
117b19a7275SDominik Brodowski res = s->io[i].res = __iodyn_find_io_region(s, *base,
118b19a7275SDominik Brodowski num, align);
119b19a7275SDominik Brodowski if (!res)
120b19a7275SDominik Brodowski return -EINVAL;
121b19a7275SDominik Brodowski
122b19a7275SDominik Brodowski *base = res->start;
123b19a7275SDominik Brodowski s->io[i].res->flags =
124b19a7275SDominik Brodowski ((res->flags & ~IORESOURCE_BITS) |
125b19a7275SDominik Brodowski (attr & IORESOURCE_BITS));
126b19a7275SDominik Brodowski s->io[i].InUse = num;
127ad0c7be2SDominik Brodowski *parent = res;
128b19a7275SDominik Brodowski return 0;
129b19a7275SDominik Brodowski }
130b19a7275SDominik Brodowski
131b19a7275SDominik Brodowski /* Try to extend top of window */
132b19a7275SDominik Brodowski try = res->end + 1;
133b19a7275SDominik Brodowski if ((*base == 0) || (*base == try)) {
134b19a7275SDominik Brodowski if (adjust_resource(s->io[i].res, res->start,
13528f65c11SJoe Perches resource_size(res) + num))
136b19a7275SDominik Brodowski continue;
137b19a7275SDominik Brodowski *base = try;
138b19a7275SDominik Brodowski s->io[i].InUse += num;
139ad0c7be2SDominik Brodowski *parent = res;
140b19a7275SDominik Brodowski return 0;
141b19a7275SDominik Brodowski }
142b19a7275SDominik Brodowski
143b19a7275SDominik Brodowski /* Try to extend bottom of window */
144b19a7275SDominik Brodowski try = res->start - num;
145b19a7275SDominik Brodowski if ((*base == 0) || (*base == try)) {
146b19a7275SDominik Brodowski if (adjust_resource(s->io[i].res,
147b19a7275SDominik Brodowski res->start - num,
14828f65c11SJoe Perches resource_size(res) + num))
149b19a7275SDominik Brodowski continue;
150b19a7275SDominik Brodowski *base = try;
151b19a7275SDominik Brodowski s->io[i].InUse += num;
152ad0c7be2SDominik Brodowski *parent = res;
153b19a7275SDominik Brodowski return 0;
154b19a7275SDominik Brodowski }
155b19a7275SDominik Brodowski }
156b19a7275SDominik Brodowski
157b19a7275SDominik Brodowski return -EINVAL;
158b19a7275SDominik Brodowski }
159b19a7275SDominik Brodowski
160b19a7275SDominik Brodowski
16149b1153aSDominik Brodowski struct pccard_resource_ops pccard_iodyn_ops = {
16249b1153aSDominik Brodowski .validate_mem = NULL,
163b19a7275SDominik Brodowski .find_io = iodyn_find_io,
16449b1153aSDominik Brodowski .find_mem = NULL,
16549b1153aSDominik Brodowski .init = static_init,
16649b1153aSDominik Brodowski .exit = NULL,
16749b1153aSDominik Brodowski };
16849b1153aSDominik Brodowski EXPORT_SYMBOL(pccard_iodyn_ops);
169