/* * 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_warn(&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_warn(&p_dev->dev, "pcmcia: request for exclusive IRQ could not be fulfilled\n"); dev_warn(&p_dev->dev, "pcmcia: the driver needs updating to supported shared IRQ lines\n"); } if (ret) dev_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);