--- /dev/null
+/*
+ * PCMCIA 16-bit resource management functions
+ *
+ * The initial developer of the original code is David A. Hinds
+ * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
+ * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
+ *
+ * Copyright (C) 1999 David A. Hinds
+ * Copyright (C) 2004-2010 Dominik Brodowski
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <linux/netdevice.h>
+#include <linux/slab.h>
+
+#include <asm/irq.h>
+
+#include <pcmcia/ss.h>
+#include <pcmcia/cistpl.h>
+#include <pcmcia/cisreg.h>
+#include <pcmcia/ds.h>
+
+#include "cs_internal.h"
+
+
+/* Access speed for IO windows */
+static int io_speed;
+module_param(io_speed, int, 0444);
+
+
+int pcmcia_validate_mem(struct pcmcia_socket *s)
+{
+ if (s->resource_ops->validate_mem)
+ return s->resource_ops->validate_mem(s);
+ /* if there is no callback, we can assume that everything is OK */
+ return 0;
+}
+
+struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
+ int low, struct pcmcia_socket *s)
+{
+ if (s->resource_ops->find_mem)
+ return s->resource_ops->find_mem(base, num, align, low, s);
+ return NULL;
+}
+
+
+/**
+ * release_io_space() - release IO ports allocated with alloc_io_space()
+ * @s: pcmcia socket
+ * @res: resource to release
+ *
+ */
+static void release_io_space(struct pcmcia_socket *s, struct resource *res)
+{
+ resource_size_t num = resource_size(res);
+ int i;
+
+ dev_dbg(&s->dev, "release_io_space for %pR\n", res);
+
+ for (i = 0; i < MAX_IO_WIN; i++) {
+ if (!s->io[i].res)
+ continue;
+ if ((s->io[i].res->start <= res->start) &&
+ (s->io[i].res->end >= res->end)) {
+ s->io[i].InUse -= num;
+ if (res->parent)
+ release_resource(res);
+ res->start = res->end = 0;
+ res->flags = IORESOURCE_IO;
+ /* Free the window if no one else is using it */
+ if (s->io[i].InUse == 0) {
+ release_resource(s->io[i].res);
+ kfree(s->io[i].res);
+ s->io[i].res = NULL;
+ }
+ }
+ }
+}
+
+
+/**
+ * alloc_io_space() - allocate IO ports for use by a PCMCIA device
+ * @s: pcmcia socket
+ * @res: resource to allocate (begin: begin, end: size)
+ * @lines: number of IO lines decoded by the PCMCIA card
+ *
+ * Special stuff for managing IO windows, because they are scarce
+ */
+static int alloc_io_space(struct pcmcia_socket *s, struct resource *res,
+ unsigned int lines)
+{
+ unsigned int align;
+ unsigned int base = res->start;
+ unsigned int num = res->end;
+ int ret;
+
+ res->flags |= IORESOURCE_IO;
+
+ dev_dbg(&s->dev, "alloc_io_space request for %pR, %d lines\n",
+ res, lines);
+
+ align = base ? (lines ? 1<<lines : 0) : 1;
+ if (align && (align < num)) {
+ if (base) {
+ dev_dbg(&s->dev, "odd IO request\n");
+ align = 0;
+ } else
+ while (align && (align < num))
+ align <<= 1;
+ }
+ if (base & ~(align-1)) {
+ dev_dbg(&s->dev, "odd IO request\n");
+ align = 0;
+ }
+
+ ret = s->resource_ops->find_io(s, res->flags, &base, num, align,
+ &res->parent);
+ if (ret) {
+ dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n", ret);
+ return -EINVAL;
+ }
+
+ res->start = base;
+ res->end = res->start + num - 1;
+
+ if (res->parent) {
+ ret = request_resource(res->parent, res);
+ if (ret) {
+ dev_warn(&s->dev,
+ "request_resource %pR failed: %d\n", res, ret);
+ res->parent = NULL;
+ release_io_space(s, res);
+ }
+ }
+ dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n", ret, res);
+ return ret;
+}
+
+
+/**
+ * pcmcia_access_config() - read or write card configuration registers
+ *
+ * pcmcia_access_config() reads and writes configuration registers in
+ * attribute memory. Memory window 0 is reserved for this and the tuple
+ * reading services. Drivers must use pcmcia_read_config_byte() or
+ * pcmcia_write_config_byte().
+ */
+static int pcmcia_access_config(struct pcmcia_device *p_dev,
+ off_t where, u8 *val,
+ int (*accessf) (struct pcmcia_socket *s,
+ int attr, unsigned int addr,
+ unsigned int len, void *ptr))
+{
+ struct pcmcia_socket *s;
+ config_t *c;
+ int addr;
+ int ret = 0;
+
+ s = p_dev->socket;
+
+ mutex_lock(&s->ops_mutex);
+ c = p_dev->function_config;
+
+ if (!(c->state & CONFIG_LOCKED)) {
+ dev_dbg(&p_dev->dev, "Configuration isn't locked\n");
+ mutex_unlock(&s->ops_mutex);
+ return -EACCES;
+ }
+
+ addr = (p_dev->config_base + where) >> 1;
+
+ ret = accessf(s, 1, addr, 1, val);
+
+ mutex_unlock(&s->ops_mutex);
+
+ return ret;
+}
+
+
+/**
+ * pcmcia_read_config_byte() - read a byte from a card configuration register
+ *
+ * pcmcia_read_config_byte() reads a byte from a configuration register in
+ * attribute memory.
+ */
+int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val)
+{
+ return pcmcia_access_config(p_dev, where, val, pcmcia_read_cis_mem);
+}
+EXPORT_SYMBOL(pcmcia_read_config_byte);
+
+
+/**
+ * pcmcia_write_config_byte() - write a byte to a card configuration register
+ *
+ * pcmcia_write_config_byte() writes a byte to a configuration register in
+ * attribute memory.
+ */
+int pcmcia_write_config_byte(struct pcmcia_device *p_dev, off_t where, u8 val)
+{
+ return pcmcia_access_config(p_dev, where, &val, pcmcia_write_cis_mem);
+}
+EXPORT_SYMBOL(pcmcia_write_config_byte);
+
+
+/**
+ * pcmcia_map_mem_page() - modify iomem window to point to a different offset
+ * @p_dev: pcmcia device
+ * @res: iomem resource already enabled by pcmcia_request_window()
+ * @offset: card_offset to map
+ *
+ * pcmcia_map_mem_page() modifies what can be read and written by accessing
+ * an iomem range previously enabled by pcmcia_request_window(), by setting
+ * the card_offset value to @offset.
+ */
+int pcmcia_map_mem_page(struct pcmcia_device *p_dev, struct resource *res,
+ unsigned int offset)
+{
+ struct pcmcia_socket *s = p_dev->socket;
+ unsigned int w;
+ int ret;
+
+ w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
+ if (w >= MAX_WIN)
+ return -EINVAL;
+
+ mutex_lock(&s->ops_mutex);
+ s->win[w].card_start = offset;
+ ret = s->ops->set_mem_map(s, &s->win[w]);
+ if (ret)
+ dev_warn(&p_dev->dev, "failed to set_mem_map\n");
+ mutex_unlock(&s->ops_mutex);
+ return ret;
+}
+EXPORT_SYMBOL(pcmcia_map_mem_page);
+
+
+/**
+ * pcmcia_fixup_iowidth() - reduce io width to 8bit
+ * @p_dev: pcmcia device
+ *
+ * pcmcia_fixup_iowidth() allows a PCMCIA device driver to reduce the
+ * IO width to 8bit after having called pcmcia_enable_device()
+ * previously.
+ */
+int pcmcia_fixup_iowidth(struct pcmcia_device *p_dev)
+{
+ struct pcmcia_socket *s = p_dev->socket;
+ pccard_io_map io_off = { 0, 0, 0, 0, 1 };
+ pccard_io_map io_on;
+ int i, ret = 0;
+
+ mutex_lock(&s->ops_mutex);
+
+ dev_dbg(&p_dev->dev, "fixup iowidth to 8bit\n");
+
+ if (!(s->state & SOCKET_PRESENT) ||
+ !(p_dev->function_config->state & CONFIG_LOCKED)) {
+ dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
+ ret = -EACCES;
+ goto unlock;
+ }
+
+ io_on.speed = io_speed;
+ for (i = 0; i < MAX_IO_WIN; i++) {
+ if (!s->io[i].res)
+ continue;
+ io_off.map = i;
+ io_on.map = i;
+
+ io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
+ io_on.start = s->io[i].res->start;
+ io_on.stop = s->io[i].res->end;
+
+ s->ops->set_io_map(s, &io_off);
+ mdelay(40);
+ s->ops->set_io_map(s, &io_on);
+ }
+unlock:
+ mutex_unlock(&s->ops_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(pcmcia_fixup_iowidth);
+
+
+/**
+ * pcmcia_fixup_vpp() - set Vpp to a new voltage level
+ * @p_dev: pcmcia device
+ * @new_vpp: new Vpp voltage
+ *
+ * pcmcia_fixup_vpp() allows a PCMCIA device driver to set Vpp to
+ * a new voltage level between calls to pcmcia_enable_device()
+ * and pcmcia_disable_device().
+ */
+int pcmcia_fixup_vpp(struct pcmcia_device *p_dev, unsigned char new_vpp)
+{
+ struct pcmcia_socket *s = p_dev->socket;
+ int ret = 0;
+
+ mutex_lock(&s->ops_mutex);
+
+ dev_dbg(&p_dev->dev, "fixup Vpp to %d\n", new_vpp);
+
+ if (!(s->state & SOCKET_PRESENT) ||
+ !(p_dev->function_config->state & CONFIG_LOCKED)) {
+ dev_dbg(&p_dev->dev, "No card? Config not locked?\n");
+ ret = -EACCES;
+ goto unlock;
+ }
+
+ s->socket.Vpp = new_vpp;
+ if (s->ops->set_socket(s, &s->socket)) {
+ dev_warn(&p_dev->dev, "Unable to set VPP\n");
+ ret = -EIO;
+ goto unlock;
+ }
+ p_dev->vpp = new_vpp;
+
+unlock:
+ mutex_unlock(&s->ops_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(pcmcia_fixup_vpp);
+
+
+/**
+ * pcmcia_release_configuration() - physically disable a PCMCIA device
+ * @p_dev: pcmcia device
+ *
+ * pcmcia_release_configuration() is the 1:1 counterpart to
+ * pcmcia_enable_device(): If a PCMCIA device is no longer used by any
+ * driver, the Vpp voltage is set to 0, IRQs will no longer be generated,
+ * and I/O ranges will be disabled. As pcmcia_release_io() and
+ * pcmcia_release_window() still need to be called, device drivers are
+ * expected to call pcmcia_disable_device() instead.
+ */
+int pcmcia_release_configuration(struct pcmcia_device *p_dev)
+{
+ pccard_io_map io = { 0, 0, 0, 0, 1 };
+ struct pcmcia_socket *s = p_dev->socket;
+ config_t *c;
+ int i;
+
+ mutex_lock(&s->ops_mutex);
+ c = p_dev->function_config;
+ if (p_dev->_locked) {
+ p_dev->_locked = 0;
+ if (--(s->lock_count) == 0) {
+ s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
+ s->socket.Vpp = 0;
+ s->socket.io_irq = 0;
+ s->ops->set_socket(s, &s->socket);
+ }
+ }
+ if (c->state & CONFIG_LOCKED) {
+ c->state &= ~CONFIG_LOCKED;
+ if (c->state & CONFIG_IO_REQ)
+ for (i = 0; i < MAX_IO_WIN; i++) {
+ if (!s->io[i].res)
+ continue;
+ s->io[i].Config--;
+ if (s->io[i].Config != 0)
+ continue;
+ io.map = i;
+ s->ops->set_io_map(s, &io);
+ }
+ }
+ mutex_unlock(&s->ops_mutex);
+
+ return 0;
+}
+
+
+/**
+ * pcmcia_release_io() - release I/O allocated by a PCMCIA device
+ * @p_dev: pcmcia device
+ *
+ * pcmcia_release_io() releases the I/O ranges allocated by a PCMCIA
+ * device. This may be invoked some time after a card ejection has
+ * already dumped the actual socket configuration, so if the client is
+ * "stale", we don't bother checking the port ranges against the
+ * current socket values.
+ */
+static int pcmcia_release_io(struct pcmcia_device *p_dev)
+{
+ struct pcmcia_socket *s = p_dev->socket;
+ int ret = -EINVAL;
+ config_t *c;
+
+ mutex_lock(&s->ops_mutex);
+ if (!p_dev->_io)
+ goto out;
+
+ c = p_dev->function_config;
+
+ release_io_space(s, &c->io[0]);
+
+ if (c->io[1].end)
+ release_io_space(s, &c->io[1]);
+
+ p_dev->_io = 0;
+ c->state &= ~CONFIG_IO_REQ;
+
+out:
+ mutex_unlock(&s->ops_mutex);
+
+ return ret;
+} /* pcmcia_release_io */
+
+
+/**
+ * pcmcia_release_window() - release reserved iomem for PCMCIA devices
+ * @p_dev: pcmcia device
+ * @res: iomem resource to release
+ *
+ * pcmcia_release_window() releases &struct resource *res which was
+ * previously reserved by calling pcmcia_request_window().
+ */
+int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res)
+{
+ struct pcmcia_socket *s = p_dev->socket;
+ pccard_mem_map *win;
+ unsigned int w;
+
+ dev_dbg(&p_dev->dev, "releasing window %pR\n", res);
+
+ w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1;
+ if (w >= MAX_WIN)
+ return -EINVAL;
+
+ mutex_lock(&s->ops_mutex);
+ win = &s->win[w];
+
+ if (!(p_dev->_win & CLIENT_WIN_REQ(w))) {
+ dev_dbg(&p_dev->dev, "not releasing unknown window\n");
+ mutex_unlock(&s->ops_mutex);
+ return -EINVAL;
+ }
+
+ /* Shut down memory window */
+ win->flags &= ~MAP_ACTIVE;
+ s->ops->set_mem_map(s, win);
+ s->state &= ~SOCKET_WIN_REQ(w);
+
+ /* Release system memory */
+ if (win->res) {
+ release_resource(res);
+ release_resource(win->res);
+ kfree(win->res);
+ win->res = NULL;
+ }
+ res->start = res->end = 0;
+ res->flags = IORESOURCE_MEM;
+ p_dev->_win &= ~CLIENT_WIN_REQ(w);
+ mutex_unlock(&s->ops_mutex);
+
+ return 0;
+} /* pcmcia_release_window */
+EXPORT_SYMBOL(pcmcia_release_window);
+
+
+/**
+ * pcmcia_enable_device() - set up and activate a PCMCIA device
+ * @p_dev: the associated PCMCIA device
+ *
+ * pcmcia_enable_device() physically enables a PCMCIA device. It parses
+ * the flags passed to in @flags and stored in @p_dev->flags and sets up
+ * the Vpp voltage, enables the speaker line, I/O ports and store proper
+ * values to configuration registers.
+ */
+int pcmcia_enable_device(struct pcmcia_device *p_dev)
+{
+ int i;
+ unsigned int base;
+ struct pcmcia_socket *s = p_dev->socket;
+ config_t *c;
+ pccard_io_map iomap;
+ unsigned char status = 0;
+ unsigned char ext_status = 0;
+ unsigned char option = 0;
+ unsigned int flags = p_dev->config_flags;
+
+ if (!(s->state & SOCKET_PRESENT))
+ return -ENODEV;
+
+ mutex_lock(&s->ops_mutex);
+ c = p_dev->function_config;
+ if (c->state & CONFIG_LOCKED) {
+ mutex_unlock(&s->ops_mutex);
+ dev_dbg(&p_dev->dev, "Configuration is locked\n");
+ return -EACCES;
+ }
+
+ /* Do power control. We don't allow changes in Vcc. */
+ s->socket.Vpp = p_dev->vpp;
+ if (s->ops->set_socket(s, &s->socket)) {
+ mutex_unlock(&s->ops_mutex);
+ dev_printk(KERN_WARNING, &p_dev->dev,
+ "Unable to set socket state\n");
+ return -EINVAL;
+ }
+
+ /* Pick memory or I/O card, DMA mode, interrupt */
+ if (p_dev->_io || flags & CONF_ENABLE_IRQ)
+ flags |= CONF_ENABLE_IOCARD;
+ if (flags & CONF_ENABLE_IOCARD)
+ s->socket.flags |= SS_IOCARD;
+ if (flags & CONF_ENABLE_ZVCARD)
+ s->socket.flags |= SS_ZVCARD | SS_IOCARD;
+ if (flags & CONF_ENABLE_SPKR) {
+ s->socket.flags |= SS_SPKR_ENA;
+ status = CCSR_AUDIO_ENA;
+ if (!(p_dev->config_regs & PRESENT_STATUS))
+ dev_warn(&p_dev->dev, "speaker requested, but "
+ "PRESENT_STATUS not set!\n");
+ }
+ if (flags & CONF_ENABLE_IRQ)
+ s->socket.io_irq = s->pcmcia_irq;
+ else
+ s->socket.io_irq = 0;
+ if (flags & CONF_ENABLE_ESR) {
+ p_dev->config_regs |= PRESENT_EXT_STATUS;
+ ext_status = ESR_REQ_ATTN_ENA;
+ }
+ s->ops->set_socket(s, &s->socket);
+ s->lock_count++;
+
+ dev_dbg(&p_dev->dev,
+ "enable_device: V %d, flags %x, base %x, regs %x, idx %x\n",
+ p_dev->vpp, flags, p_dev->config_base, p_dev->config_regs,
+ p_dev->config_index);
+
+ /* Set up CIS configuration registers */
+ base = p_dev->config_base;
+ if (p_dev->config_regs & PRESENT_COPY) {
+ u16 tmp = 0;
+ dev_dbg(&p_dev->dev, "clearing CISREG_SCR\n");
+ pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &tmp);
+ }
+ if (p_dev->config_regs & PRESENT_PIN_REPLACE) {
+ u16 tmp = 0;
+ dev_dbg(&p_dev->dev, "clearing CISREG_PRR\n");
+ pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &tmp);
+ }
+ if (p_dev->config_regs & PRESENT_OPTION) {
+ if (s->functions == 1) {
+ option = p_dev->config_index & COR_CONFIG_MASK;
+ } else {
+ option = p_dev->config_index & COR_MFC_CONFIG_MASK;
+ 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);
+ mdelay(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);
+
+
+/**
+ * pcmcia_request_exclusive_irq() - attempt to request an exclusive IRQ first
+ * @p_dev: the associated PCMCIA device
+ * @handler: IRQ handler to register
+ *
+ * pcmcia_request_exclusive_irq() is a wrapper around request_irq() which
+ * attempts first to request an exclusive IRQ. If it fails, it also accepts
+ * a shared IRQ, but prints out a warning. PCMCIA drivers should allow for
+ * IRQ sharing and either use request_irq directly (then they need to call
+ * free_irq() themselves, too), or the pcmcia_request_irq() function.
+ */
+int __must_check
+__pcmcia_request_exclusive_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, 0, p_dev->devname, p_dev->priv);
+ if (ret) {
+ ret = pcmcia_request_irq(p_dev, handler);
+ dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
+ "request for exclusive IRQ could not be fulfilled.\n");
+ dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
+ "needs updating to supported shared IRQ lines.\n");
+ }
+ if (ret)
+ dev_printk(KERN_INFO, &p_dev->dev, "request_irq() failed\n");
+ else
+ p_dev->_irq = 1;
+
+ return ret;
+} /* pcmcia_request_exclusive_irq */
+EXPORT_SYMBOL(__pcmcia_request_exclusive_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);
Code Review / kvmfornfv.git / blobdiff