| /* |
| * 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 isnt'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) |
| s->socket.flags |= 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); |