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957 lines
24 KiB
957 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* PCMCIA 16-bit resource management functions |
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* |
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* The initial developer of the original code is David A. Hinds |
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* <[email protected]>. Portions created by David A. Hinds |
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* are Copyright (C) 1999 David A. Hinds. All Rights Reserved. |
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* |
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* Copyright (C) 1999 David A. Hinds |
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* Copyright (C) 2004-2010 Dominik Brodowski |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> |
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#include <linux/pci.h> |
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#include <linux/device.h> |
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#include <linux/netdevice.h> |
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#include <linux/slab.h> |
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#include <asm/irq.h> |
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#include <pcmcia/ss.h> |
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#include <pcmcia/cistpl.h> |
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#include <pcmcia/cisreg.h> |
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#include <pcmcia/ds.h> |
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#include "cs_internal.h" |
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/* Access speed for IO windows */ |
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static int io_speed; |
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module_param(io_speed, int, 0444); |
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int pcmcia_validate_mem(struct pcmcia_socket *s) |
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{ |
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if (s->resource_ops->validate_mem) |
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return s->resource_ops->validate_mem(s); |
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/* if there is no callback, we can assume that everything is OK */ |
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return 0; |
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} |
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struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align, |
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int low, struct pcmcia_socket *s) |
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{ |
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if (s->resource_ops->find_mem) |
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return s->resource_ops->find_mem(base, num, align, low, s); |
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return NULL; |
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} |
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/** |
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* release_io_space() - release IO ports allocated with alloc_io_space() |
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* @s: pcmcia socket |
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* @res: resource to release |
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* |
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*/ |
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static void release_io_space(struct pcmcia_socket *s, struct resource *res) |
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{ |
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resource_size_t num = resource_size(res); |
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int i; |
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dev_dbg(&s->dev, "release_io_space for %pR\n", res); |
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for (i = 0; i < MAX_IO_WIN; i++) { |
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if (!s->io[i].res) |
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continue; |
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if ((s->io[i].res->start <= res->start) && |
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(s->io[i].res->end >= res->end)) { |
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s->io[i].InUse -= num; |
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if (res->parent) |
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release_resource(res); |
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res->start = res->end = 0; |
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res->flags = IORESOURCE_IO; |
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/* Free the window if no one else is using it */ |
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if (s->io[i].InUse == 0) { |
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release_resource(s->io[i].res); |
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kfree(s->io[i].res); |
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s->io[i].res = NULL; |
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} |
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} |
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} |
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} |
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/** |
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* alloc_io_space() - allocate IO ports for use by a PCMCIA device |
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* @s: pcmcia socket |
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* @res: resource to allocate (begin: begin, end: size) |
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* @lines: number of IO lines decoded by the PCMCIA card |
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* |
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* Special stuff for managing IO windows, because they are scarce |
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*/ |
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static int alloc_io_space(struct pcmcia_socket *s, struct resource *res, |
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unsigned int lines) |
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{ |
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unsigned int align; |
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unsigned int base = res->start; |
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unsigned int num = res->end; |
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int ret; |
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res->flags |= IORESOURCE_IO; |
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dev_dbg(&s->dev, "alloc_io_space request for %pR, %d lines\n", |
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res, lines); |
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align = base ? (lines ? 1<<lines : 0) : 1; |
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if (align && (align < num)) { |
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if (base) { |
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dev_dbg(&s->dev, "odd IO request\n"); |
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align = 0; |
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} else |
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while (align && (align < num)) |
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align <<= 1; |
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} |
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if (base & ~(align-1)) { |
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dev_dbg(&s->dev, "odd IO request\n"); |
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align = 0; |
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} |
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ret = s->resource_ops->find_io(s, res->flags, &base, num, align, |
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&res->parent); |
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if (ret) { |
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dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n", ret); |
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return -EINVAL; |
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} |
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res->start = base; |
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res->end = res->start + num - 1; |
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if (res->parent) { |
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ret = request_resource(res->parent, res); |
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if (ret) { |
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dev_warn(&s->dev, |
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"request_resource %pR failed: %d\n", res, ret); |
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res->parent = NULL; |
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release_io_space(s, res); |
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} |
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} |
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dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n", ret, res); |
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return ret; |
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} |
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/** |
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* pcmcia_access_config() - read or write card configuration registers |
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* |
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* pcmcia_access_config() reads and writes configuration registers in |
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* attribute memory. Memory window 0 is reserved for this and the tuple |
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* reading services. Drivers must use pcmcia_read_config_byte() or |
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* pcmcia_write_config_byte(). |
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*/ |
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static int pcmcia_access_config(struct pcmcia_device *p_dev, |
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off_t where, u8 *val, |
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int (*accessf) (struct pcmcia_socket *s, |
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int attr, unsigned int addr, |
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unsigned int len, void *ptr)) |
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{ |
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struct pcmcia_socket *s; |
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config_t *c; |
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int addr; |
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int ret = 0; |
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s = p_dev->socket; |
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mutex_lock(&s->ops_mutex); |
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c = p_dev->function_config; |
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if (!(c->state & CONFIG_LOCKED)) { |
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dev_dbg(&p_dev->dev, "Configuration isn't locked\n"); |
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mutex_unlock(&s->ops_mutex); |
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return -EACCES; |
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} |
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addr = (p_dev->config_base + where) >> 1; |
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ret = accessf(s, 1, addr, 1, val); |
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mutex_unlock(&s->ops_mutex); |
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return ret; |
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} |
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/** |
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* pcmcia_read_config_byte() - read a byte from a card configuration register |
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* |
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* pcmcia_read_config_byte() reads a byte from a configuration register in |
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* attribute memory. |
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*/ |
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int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val) |
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{ |
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return pcmcia_access_config(p_dev, where, val, pcmcia_read_cis_mem); |
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} |
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EXPORT_SYMBOL(pcmcia_read_config_byte); |
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/** |
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* pcmcia_write_config_byte() - write a byte to a card configuration register |
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* |
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* pcmcia_write_config_byte() writes a byte to a configuration register in |
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* attribute memory. |
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*/ |
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int pcmcia_write_config_byte(struct pcmcia_device *p_dev, off_t where, u8 val) |
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{ |
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return pcmcia_access_config(p_dev, where, &val, pcmcia_write_cis_mem); |
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} |
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EXPORT_SYMBOL(pcmcia_write_config_byte); |
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/** |
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* pcmcia_map_mem_page() - modify iomem window to point to a different offset |
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* @p_dev: pcmcia device |
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* @res: iomem resource already enabled by pcmcia_request_window() |
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* @offset: card_offset to map |
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* |
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* pcmcia_map_mem_page() modifies what can be read and written by accessing |
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* an iomem range previously enabled by pcmcia_request_window(), by setting |
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* the card_offset value to @offset. |
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*/ |
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int pcmcia_map_mem_page(struct pcmcia_device *p_dev, struct resource *res, |
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unsigned int offset) |
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{ |
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struct pcmcia_socket *s = p_dev->socket; |
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unsigned int w; |
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int ret; |
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w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1; |
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if (w >= MAX_WIN) |
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return -EINVAL; |
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mutex_lock(&s->ops_mutex); |
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s->win[w].card_start = offset; |
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ret = s->ops->set_mem_map(s, &s->win[w]); |
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if (ret) |
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dev_warn(&p_dev->dev, "failed to set_mem_map\n"); |
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mutex_unlock(&s->ops_mutex); |
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return ret; |
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} |
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EXPORT_SYMBOL(pcmcia_map_mem_page); |
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/** |
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* pcmcia_fixup_iowidth() - reduce io width to 8bit |
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* @p_dev: pcmcia device |
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* |
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* pcmcia_fixup_iowidth() allows a PCMCIA device driver to reduce the |
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* IO width to 8bit after having called pcmcia_enable_device() |
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* previously. |
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*/ |
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int pcmcia_fixup_iowidth(struct pcmcia_device *p_dev) |
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{ |
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struct pcmcia_socket *s = p_dev->socket; |
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pccard_io_map io_off = { 0, 0, 0, 0, 1 }; |
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pccard_io_map io_on; |
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int i, ret = 0; |
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mutex_lock(&s->ops_mutex); |
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dev_dbg(&p_dev->dev, "fixup iowidth to 8bit\n"); |
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if (!(s->state & SOCKET_PRESENT) || |
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!(p_dev->function_config->state & CONFIG_LOCKED)) { |
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dev_dbg(&p_dev->dev, "No card? Config not locked?\n"); |
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ret = -EACCES; |
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goto unlock; |
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} |
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io_on.speed = io_speed; |
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for (i = 0; i < MAX_IO_WIN; i++) { |
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if (!s->io[i].res) |
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continue; |
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io_off.map = i; |
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io_on.map = i; |
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io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8; |
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io_on.start = s->io[i].res->start; |
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io_on.stop = s->io[i].res->end; |
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s->ops->set_io_map(s, &io_off); |
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msleep(40); |
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s->ops->set_io_map(s, &io_on); |
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} |
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unlock: |
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mutex_unlock(&s->ops_mutex); |
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return ret; |
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} |
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EXPORT_SYMBOL(pcmcia_fixup_iowidth); |
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/** |
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* pcmcia_fixup_vpp() - set Vpp to a new voltage level |
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* @p_dev: pcmcia device |
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* @new_vpp: new Vpp voltage |
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* |
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* pcmcia_fixup_vpp() allows a PCMCIA device driver to set Vpp to |
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* a new voltage level between calls to pcmcia_enable_device() |
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* and pcmcia_disable_device(). |
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*/ |
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int pcmcia_fixup_vpp(struct pcmcia_device *p_dev, unsigned char new_vpp) |
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{ |
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struct pcmcia_socket *s = p_dev->socket; |
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int ret = 0; |
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mutex_lock(&s->ops_mutex); |
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dev_dbg(&p_dev->dev, "fixup Vpp to %d\n", new_vpp); |
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if (!(s->state & SOCKET_PRESENT) || |
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!(p_dev->function_config->state & CONFIG_LOCKED)) { |
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dev_dbg(&p_dev->dev, "No card? Config not locked?\n"); |
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ret = -EACCES; |
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goto unlock; |
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} |
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s->socket.Vpp = new_vpp; |
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if (s->ops->set_socket(s, &s->socket)) { |
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dev_warn(&p_dev->dev, "Unable to set VPP\n"); |
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ret = -EIO; |
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goto unlock; |
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} |
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p_dev->vpp = new_vpp; |
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unlock: |
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mutex_unlock(&s->ops_mutex); |
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return ret; |
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} |
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EXPORT_SYMBOL(pcmcia_fixup_vpp); |
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/** |
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* pcmcia_release_configuration() - physically disable a PCMCIA device |
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* @p_dev: pcmcia device |
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* |
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* pcmcia_release_configuration() is the 1:1 counterpart to |
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* pcmcia_enable_device(): If a PCMCIA device is no longer used by any |
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* driver, the Vpp voltage is set to 0, IRQs will no longer be generated, |
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* and I/O ranges will be disabled. As pcmcia_release_io() and |
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* pcmcia_release_window() still need to be called, device drivers are |
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* expected to call pcmcia_disable_device() instead. |
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*/ |
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int pcmcia_release_configuration(struct pcmcia_device *p_dev) |
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{ |
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pccard_io_map io = { 0, 0, 0, 0, 1 }; |
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struct pcmcia_socket *s = p_dev->socket; |
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config_t *c; |
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int i; |
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mutex_lock(&s->ops_mutex); |
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c = p_dev->function_config; |
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if (p_dev->_locked) { |
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p_dev->_locked = 0; |
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if (--(s->lock_count) == 0) { |
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s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */ |
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s->socket.Vpp = 0; |
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s->socket.io_irq = 0; |
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s->ops->set_socket(s, &s->socket); |
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} |
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} |
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if (c->state & CONFIG_LOCKED) { |
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c->state &= ~CONFIG_LOCKED; |
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if (c->state & CONFIG_IO_REQ) |
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for (i = 0; i < MAX_IO_WIN; i++) { |
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if (!s->io[i].res) |
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continue; |
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s->io[i].Config--; |
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if (s->io[i].Config != 0) |
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continue; |
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io.map = i; |
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s->ops->set_io_map(s, &io); |
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} |
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} |
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mutex_unlock(&s->ops_mutex); |
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return 0; |
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} |
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/** |
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* pcmcia_release_io() - release I/O allocated by a PCMCIA device |
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* @p_dev: pcmcia device |
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* |
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* pcmcia_release_io() releases the I/O ranges allocated by a PCMCIA |
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* device. This may be invoked some time after a card ejection has |
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* already dumped the actual socket configuration, so if the client is |
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* "stale", we don't bother checking the port ranges against the |
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* current socket values. |
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*/ |
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static int pcmcia_release_io(struct pcmcia_device *p_dev) |
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{ |
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struct pcmcia_socket *s = p_dev->socket; |
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int ret = -EINVAL; |
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config_t *c; |
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mutex_lock(&s->ops_mutex); |
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if (!p_dev->_io) |
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goto out; |
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c = p_dev->function_config; |
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release_io_space(s, &c->io[0]); |
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if (c->io[1].end) |
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release_io_space(s, &c->io[1]); |
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p_dev->_io = 0; |
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c->state &= ~CONFIG_IO_REQ; |
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out: |
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mutex_unlock(&s->ops_mutex); |
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return ret; |
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} /* pcmcia_release_io */ |
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/** |
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* pcmcia_release_window() - release reserved iomem for PCMCIA devices |
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* @p_dev: pcmcia device |
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* @res: iomem resource to release |
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* |
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* pcmcia_release_window() releases &struct resource *res which was |
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* previously reserved by calling pcmcia_request_window(). |
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*/ |
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int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res) |
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{ |
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struct pcmcia_socket *s = p_dev->socket; |
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pccard_mem_map *win; |
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unsigned int w; |
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dev_dbg(&p_dev->dev, "releasing window %pR\n", res); |
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w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1; |
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if (w >= MAX_WIN) |
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return -EINVAL; |
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mutex_lock(&s->ops_mutex); |
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win = &s->win[w]; |
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if (!(p_dev->_win & CLIENT_WIN_REQ(w))) { |
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dev_dbg(&p_dev->dev, "not releasing unknown window\n"); |
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mutex_unlock(&s->ops_mutex); |
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return -EINVAL; |
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} |
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/* Shut down memory window */ |
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win->flags &= ~MAP_ACTIVE; |
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s->ops->set_mem_map(s, win); |
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s->state &= ~SOCKET_WIN_REQ(w); |
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/* Release system memory */ |
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if (win->res) { |
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release_resource(res); |
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release_resource(win->res); |
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kfree(win->res); |
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win->res = NULL; |
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} |
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res->start = res->end = 0; |
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res->flags = IORESOURCE_MEM; |
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p_dev->_win &= ~CLIENT_WIN_REQ(w); |
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mutex_unlock(&s->ops_mutex); |
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return 0; |
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} /* pcmcia_release_window */ |
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EXPORT_SYMBOL(pcmcia_release_window); |
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/** |
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* pcmcia_enable_device() - set up and activate a PCMCIA device |
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* @p_dev: the associated PCMCIA device |
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* |
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* pcmcia_enable_device() physically enables a PCMCIA device. It parses |
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* the flags passed to in @flags and stored in @p_dev->flags and sets up |
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* the Vpp voltage, enables the speaker line, I/O ports and store proper |
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* values to configuration registers. |
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*/ |
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int pcmcia_enable_device(struct pcmcia_device *p_dev) |
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{ |
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int i; |
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unsigned int base; |
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struct pcmcia_socket *s = p_dev->socket; |
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config_t *c; |
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pccard_io_map iomap; |
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unsigned char status = 0; |
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unsigned char ext_status = 0; |
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unsigned char option = 0; |
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unsigned int flags = p_dev->config_flags; |
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if (!(s->state & SOCKET_PRESENT)) |
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return -ENODEV; |
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mutex_lock(&s->ops_mutex); |
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c = p_dev->function_config; |
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if (c->state & CONFIG_LOCKED) { |
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mutex_unlock(&s->ops_mutex); |
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dev_dbg(&p_dev->dev, "Configuration is locked\n"); |
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return -EACCES; |
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} |
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|
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/* Do power control. We don't allow changes in Vcc. */ |
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s->socket.Vpp = p_dev->vpp; |
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if (s->ops->set_socket(s, &s->socket)) { |
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mutex_unlock(&s->ops_mutex); |
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dev_warn(&p_dev->dev, "Unable to set socket state\n"); |
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return -EINVAL; |
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} |
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/* Pick memory or I/O card, DMA mode, interrupt */ |
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if (p_dev->_io || flags & CONF_ENABLE_IRQ) |
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flags |= CONF_ENABLE_IOCARD; |
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if (flags & CONF_ENABLE_IOCARD) |
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s->socket.flags |= SS_IOCARD; |
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if (flags & CONF_ENABLE_ZVCARD) |
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s->socket.flags |= SS_ZVCARD | SS_IOCARD; |
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if (flags & CONF_ENABLE_SPKR) { |
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s->socket.flags |= SS_SPKR_ENA; |
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status = CCSR_AUDIO_ENA; |
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if (!(p_dev->config_regs & PRESENT_STATUS)) |
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dev_warn(&p_dev->dev, "speaker requested, but " |
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"PRESENT_STATUS not set!\n"); |
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} |
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if (flags & CONF_ENABLE_IRQ) |
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s->socket.io_irq = s->pcmcia_irq; |
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else |
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s->socket.io_irq = 0; |
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if (flags & CONF_ENABLE_ESR) { |
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p_dev->config_regs |= PRESENT_EXT_STATUS; |
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ext_status = ESR_REQ_ATTN_ENA; |
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} |
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s->ops->set_socket(s, &s->socket); |
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s->lock_count++; |
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dev_dbg(&p_dev->dev, |
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"enable_device: V %d, flags %x, base %x, regs %x, idx %x\n", |
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p_dev->vpp, flags, p_dev->config_base, p_dev->config_regs, |
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p_dev->config_index); |
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|
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/* Set up CIS configuration registers */ |
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base = p_dev->config_base; |
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if (p_dev->config_regs & PRESENT_COPY) { |
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u16 tmp = 0; |
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dev_dbg(&p_dev->dev, "clearing CISREG_SCR\n"); |
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pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &tmp); |
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} |
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if (p_dev->config_regs & PRESENT_PIN_REPLACE) { |
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u16 tmp = 0; |
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dev_dbg(&p_dev->dev, "clearing CISREG_PRR\n"); |
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pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &tmp); |
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} |
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if (p_dev->config_regs & PRESENT_OPTION) { |
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if (s->functions == 1) { |
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option = p_dev->config_index & COR_CONFIG_MASK; |
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} else { |
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option = p_dev->config_index & COR_MFC_CONFIG_MASK; |
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option |= COR_FUNC_ENA|COR_IREQ_ENA; |
|
if (p_dev->config_regs & PRESENT_IOBASE_0) |
|
option |= COR_ADDR_DECODE; |
|
} |
|
if ((flags & CONF_ENABLE_IRQ) && |
|
!(flags & CONF_ENABLE_PULSE_IRQ)) |
|
option |= COR_LEVEL_REQ; |
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &option); |
|
msleep(40); |
|
} |
|
if (p_dev->config_regs & PRESENT_STATUS) |
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &status); |
|
|
|
if (p_dev->config_regs & PRESENT_EXT_STATUS) |
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, |
|
&ext_status); |
|
|
|
if (p_dev->config_regs & PRESENT_IOBASE_0) { |
|
u8 b = c->io[0].start & 0xff; |
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b); |
|
b = (c->io[0].start >> 8) & 0xff; |
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b); |
|
} |
|
if (p_dev->config_regs & PRESENT_IOSIZE) { |
|
u8 b = resource_size(&c->io[0]) + resource_size(&c->io[1]) - 1; |
|
pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b); |
|
} |
|
|
|
/* Configure I/O windows */ |
|
if (c->state & CONFIG_IO_REQ) { |
|
iomap.speed = io_speed; |
|
for (i = 0; i < MAX_IO_WIN; i++) |
|
if (s->io[i].res) { |
|
iomap.map = i; |
|
iomap.flags = MAP_ACTIVE; |
|
switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) { |
|
case IO_DATA_PATH_WIDTH_16: |
|
iomap.flags |= MAP_16BIT; break; |
|
case IO_DATA_PATH_WIDTH_AUTO: |
|
iomap.flags |= MAP_AUTOSZ; break; |
|
default: |
|
break; |
|
} |
|
iomap.start = s->io[i].res->start; |
|
iomap.stop = s->io[i].res->end; |
|
s->ops->set_io_map(s, &iomap); |
|
s->io[i].Config++; |
|
} |
|
} |
|
|
|
c->state |= CONFIG_LOCKED; |
|
p_dev->_locked = 1; |
|
mutex_unlock(&s->ops_mutex); |
|
return 0; |
|
} /* pcmcia_enable_device */ |
|
EXPORT_SYMBOL(pcmcia_enable_device); |
|
|
|
|
|
/** |
|
* pcmcia_request_io() - attempt to reserve port ranges for PCMCIA devices |
|
* @p_dev: the associated PCMCIA device |
|
* |
|
* pcmcia_request_io() attempts to reserve the IO port ranges specified in |
|
* &struct pcmcia_device @p_dev->resource[0] and @p_dev->resource[1]. The |
|
* "start" value is the requested start of the IO port resource; "end" |
|
* reflects the number of ports requested. The number of IO lines requested |
|
* is specified in &struct pcmcia_device @p_dev->io_lines. |
|
*/ |
|
int pcmcia_request_io(struct pcmcia_device *p_dev) |
|
{ |
|
struct pcmcia_socket *s = p_dev->socket; |
|
config_t *c = p_dev->function_config; |
|
int ret = -EINVAL; |
|
|
|
mutex_lock(&s->ops_mutex); |
|
dev_dbg(&p_dev->dev, "pcmcia_request_io: %pR , %pR", |
|
&c->io[0], &c->io[1]); |
|
|
|
if (!(s->state & SOCKET_PRESENT)) { |
|
dev_dbg(&p_dev->dev, "pcmcia_request_io: No card present\n"); |
|
goto out; |
|
} |
|
|
|
if (c->state & CONFIG_LOCKED) { |
|
dev_dbg(&p_dev->dev, "Configuration is locked\n"); |
|
goto out; |
|
} |
|
if (c->state & CONFIG_IO_REQ) { |
|
dev_dbg(&p_dev->dev, "IO already configured\n"); |
|
goto out; |
|
} |
|
|
|
ret = alloc_io_space(s, &c->io[0], p_dev->io_lines); |
|
if (ret) |
|
goto out; |
|
|
|
if (c->io[1].end) { |
|
ret = alloc_io_space(s, &c->io[1], p_dev->io_lines); |
|
if (ret) { |
|
struct resource tmp = c->io[0]; |
|
/* release the previously allocated resource */ |
|
release_io_space(s, &c->io[0]); |
|
/* but preserve the settings, for they worked... */ |
|
c->io[0].end = resource_size(&tmp); |
|
c->io[0].start = tmp.start; |
|
c->io[0].flags = tmp.flags; |
|
goto out; |
|
} |
|
} else |
|
c->io[1].start = 0; |
|
|
|
c->state |= CONFIG_IO_REQ; |
|
p_dev->_io = 1; |
|
|
|
dev_dbg(&p_dev->dev, "pcmcia_request_io succeeded: %pR , %pR", |
|
&c->io[0], &c->io[1]); |
|
out: |
|
mutex_unlock(&s->ops_mutex); |
|
|
|
return ret; |
|
} /* pcmcia_request_io */ |
|
EXPORT_SYMBOL(pcmcia_request_io); |
|
|
|
|
|
/** |
|
* pcmcia_request_irq() - attempt to request a IRQ for a PCMCIA device |
|
* @p_dev: the associated PCMCIA device |
|
* @handler: IRQ handler to register |
|
* |
|
* pcmcia_request_irq() is a wrapper around request_irq() which allows |
|
* the PCMCIA core to clean up the registration in pcmcia_disable_device(). |
|
* Drivers are free to use request_irq() directly, but then they need to |
|
* call free_irq() themselfves, too. Also, only %IRQF_SHARED capable IRQ |
|
* handlers are allowed. |
|
*/ |
|
int __must_check pcmcia_request_irq(struct pcmcia_device *p_dev, |
|
irq_handler_t handler) |
|
{ |
|
int ret; |
|
|
|
if (!p_dev->irq) |
|
return -EINVAL; |
|
|
|
ret = request_irq(p_dev->irq, handler, IRQF_SHARED, |
|
p_dev->devname, p_dev->priv); |
|
if (!ret) |
|
p_dev->_irq = 1; |
|
|
|
return ret; |
|
} |
|
EXPORT_SYMBOL(pcmcia_request_irq); |
|
|
|
|
|
#ifdef CONFIG_PCMCIA_PROBE |
|
|
|
/* mask of IRQs already reserved by other cards, we should avoid using them */ |
|
static u8 pcmcia_used_irq[32]; |
|
|
|
static irqreturn_t test_action(int cpl, void *dev_id) |
|
{ |
|
return IRQ_NONE; |
|
} |
|
|
|
/** |
|
* pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used |
|
* @p_dev - the associated PCMCIA device |
|
* |
|
* locking note: must be called with ops_mutex locked. |
|
*/ |
|
static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type) |
|
{ |
|
struct pcmcia_socket *s = p_dev->socket; |
|
unsigned int try, irq; |
|
u32 mask = s->irq_mask; |
|
int ret = -ENODEV; |
|
|
|
for (try = 0; try < 64; try++) { |
|
irq = try % 32; |
|
|
|
if (irq > NR_IRQS) |
|
continue; |
|
|
|
/* marked as available by driver, not blocked by userspace? */ |
|
if (!((mask >> irq) & 1)) |
|
continue; |
|
|
|
/* avoid an IRQ which is already used by another PCMCIA card */ |
|
if ((try < 32) && pcmcia_used_irq[irq]) |
|
continue; |
|
|
|
/* register the correct driver, if possible, to check whether |
|
* registering a dummy handle works, i.e. if the IRQ isn't |
|
* marked as used by the kernel resource management core */ |
|
ret = request_irq(irq, test_action, type, p_dev->devname, |
|
p_dev); |
|
if (!ret) { |
|
free_irq(irq, p_dev); |
|
p_dev->irq = s->pcmcia_irq = irq; |
|
pcmcia_used_irq[irq]++; |
|
break; |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
void pcmcia_cleanup_irq(struct pcmcia_socket *s) |
|
{ |
|
pcmcia_used_irq[s->pcmcia_irq]--; |
|
s->pcmcia_irq = 0; |
|
} |
|
|
|
#else /* CONFIG_PCMCIA_PROBE */ |
|
|
|
static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type) |
|
{ |
|
return -EINVAL; |
|
} |
|
|
|
void pcmcia_cleanup_irq(struct pcmcia_socket *s) |
|
{ |
|
s->pcmcia_irq = 0; |
|
return; |
|
} |
|
|
|
#endif /* CONFIG_PCMCIA_PROBE */ |
|
|
|
|
|
/** |
|
* pcmcia_setup_irq() - determine IRQ to be used for device |
|
* @p_dev - the associated PCMCIA device |
|
* |
|
* locking note: must be called with ops_mutex locked. |
|
*/ |
|
int pcmcia_setup_irq(struct pcmcia_device *p_dev) |
|
{ |
|
struct pcmcia_socket *s = p_dev->socket; |
|
|
|
if (p_dev->irq) |
|
return 0; |
|
|
|
/* already assigned? */ |
|
if (s->pcmcia_irq) { |
|
p_dev->irq = s->pcmcia_irq; |
|
return 0; |
|
} |
|
|
|
/* prefer an exclusive ISA irq */ |
|
if (!pcmcia_setup_isa_irq(p_dev, 0)) |
|
return 0; |
|
|
|
/* but accept a shared ISA irq */ |
|
if (!pcmcia_setup_isa_irq(p_dev, IRQF_SHARED)) |
|
return 0; |
|
|
|
/* but use the PCI irq otherwise */ |
|
if (s->pci_irq) { |
|
p_dev->irq = s->pcmcia_irq = s->pci_irq; |
|
return 0; |
|
} |
|
|
|
return -EINVAL; |
|
} |
|
|
|
|
|
/** |
|
* pcmcia_request_window() - attempt to reserve iomem for PCMCIA devices |
|
* @p_dev: the associated PCMCIA device |
|
* @res: &struct resource pointing to p_dev->resource[2..5] |
|
* @speed: access speed |
|
* |
|
* pcmcia_request_window() attepts to reserve an iomem ranges specified in |
|
* &struct resource @res pointing to one of the entries in |
|
* &struct pcmcia_device @p_dev->resource[2..5]. The "start" value is the |
|
* requested start of the IO mem resource; "end" reflects the size |
|
* requested. |
|
*/ |
|
int pcmcia_request_window(struct pcmcia_device *p_dev, struct resource *res, |
|
unsigned int speed) |
|
{ |
|
struct pcmcia_socket *s = p_dev->socket; |
|
pccard_mem_map *win; |
|
u_long align; |
|
int w; |
|
|
|
dev_dbg(&p_dev->dev, "request_window %pR %d\n", res, speed); |
|
|
|
if (!(s->state & SOCKET_PRESENT)) { |
|
dev_dbg(&p_dev->dev, "No card present\n"); |
|
return -ENODEV; |
|
} |
|
|
|
/* Window size defaults to smallest available */ |
|
if (res->end == 0) |
|
res->end = s->map_size; |
|
align = (s->features & SS_CAP_MEM_ALIGN) ? res->end : s->map_size; |
|
if (res->end & (s->map_size-1)) { |
|
dev_dbg(&p_dev->dev, "invalid map size\n"); |
|
return -EINVAL; |
|
} |
|
if ((res->start && (s->features & SS_CAP_STATIC_MAP)) || |
|
(res->start & (align-1))) { |
|
dev_dbg(&p_dev->dev, "invalid base address\n"); |
|
return -EINVAL; |
|
} |
|
if (res->start) |
|
align = 0; |
|
|
|
/* Allocate system memory window */ |
|
mutex_lock(&s->ops_mutex); |
|
for (w = 0; w < MAX_WIN; w++) |
|
if (!(s->state & SOCKET_WIN_REQ(w))) |
|
break; |
|
if (w == MAX_WIN) { |
|
dev_dbg(&p_dev->dev, "all windows are used already\n"); |
|
mutex_unlock(&s->ops_mutex); |
|
return -EINVAL; |
|
} |
|
|
|
win = &s->win[w]; |
|
|
|
if (!(s->features & SS_CAP_STATIC_MAP)) { |
|
win->res = pcmcia_find_mem_region(res->start, res->end, align, |
|
0, s); |
|
if (!win->res) { |
|
dev_dbg(&p_dev->dev, "allocating mem region failed\n"); |
|
mutex_unlock(&s->ops_mutex); |
|
return -EINVAL; |
|
} |
|
} |
|
p_dev->_win |= CLIENT_WIN_REQ(w); |
|
|
|
/* Configure the socket controller */ |
|
win->map = w+1; |
|
win->flags = res->flags & WIN_FLAGS_MAP; |
|
win->speed = speed; |
|
win->card_start = 0; |
|
|
|
if (s->ops->set_mem_map(s, win) != 0) { |
|
dev_dbg(&p_dev->dev, "failed to set memory mapping\n"); |
|
mutex_unlock(&s->ops_mutex); |
|
return -EIO; |
|
} |
|
s->state |= SOCKET_WIN_REQ(w); |
|
|
|
/* Return window handle */ |
|
if (s->features & SS_CAP_STATIC_MAP) |
|
res->start = win->static_start; |
|
else |
|
res->start = win->res->start; |
|
|
|
/* convert to new-style resources */ |
|
res->end += res->start - 1; |
|
res->flags &= ~WIN_FLAGS_REQ; |
|
res->flags |= (win->map << 2) | IORESOURCE_MEM; |
|
res->parent = win->res; |
|
if (win->res) |
|
request_resource(&iomem_resource, res); |
|
|
|
dev_dbg(&p_dev->dev, "request_window results in %pR\n", res); |
|
|
|
mutex_unlock(&s->ops_mutex); |
|
|
|
return 0; |
|
} /* pcmcia_request_window */ |
|
EXPORT_SYMBOL(pcmcia_request_window); |
|
|
|
|
|
/** |
|
* pcmcia_disable_device() - disable and clean up a PCMCIA device |
|
* @p_dev: the associated PCMCIA device |
|
* |
|
* pcmcia_disable_device() is the driver-callable counterpart to |
|
* pcmcia_enable_device(): If a PCMCIA device is no longer used, |
|
* drivers are expected to clean up and disable the device by calling |
|
* this function. Any I/O ranges (iomem and ioports) will be released, |
|
* the Vpp voltage will be set to 0, and IRQs will no longer be |
|
* generated -- at least if there is no other card function (of |
|
* multifunction devices) being used. |
|
*/ |
|
void pcmcia_disable_device(struct pcmcia_device *p_dev) |
|
{ |
|
int i; |
|
|
|
dev_dbg(&p_dev->dev, "disabling device\n"); |
|
|
|
for (i = 0; i < MAX_WIN; i++) { |
|
struct resource *res = p_dev->resource[MAX_IO_WIN + i]; |
|
if (res->flags & WIN_FLAGS_REQ) |
|
pcmcia_release_window(p_dev, res); |
|
} |
|
|
|
pcmcia_release_configuration(p_dev); |
|
pcmcia_release_io(p_dev); |
|
if (p_dev->_irq) { |
|
free_irq(p_dev->irq, p_dev->priv); |
|
p_dev->_irq = 0; |
|
} |
|
} |
|
EXPORT_SYMBOL(pcmcia_disable_device);
|
|
|