/* * 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) 2004-2005 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> #define IN_CARD_SERVICES #include <pcmcia/cs_types.h> #include <pcmcia/ss.h> #include <pcmcia/cs.h> #include <pcmcia/bulkmem.h> #include <pcmcia/cistpl.h> #include <pcmcia/cisreg.h> #include <pcmcia/ds.h> #include "cs_internal.h" #include "ds_internal.h" /* Access speed for IO windows */ static int io_speed = 0; module_param(io_speed, int, 0444); #ifdef CONFIG_PCMCIA_PROBE #include <asm/irq.h> /* mask of IRQs already reserved by other cards, we should avoid using them */ static u8 pcmcia_used_irq[NR_IRQS]; #endif #ifdef DEBUG extern int ds_pc_debug; #define ds_dbg(skt, lvl, fmt, arg...) do { \ if (ds_pc_debug >= lvl) \ printk(KERN_DEBUG "pcmcia_resource: %s: " fmt, \ cs_socket_name(skt) , ## arg); \ } while (0) #else #define ds_dbg(lvl, fmt, arg...) do { } while (0) #endif /** alloc_io_space * * Special stuff for managing IO windows, because they are scarce */ static int alloc_io_space(struct pcmcia_socket *s, u_int attr, ioaddr_t *base, ioaddr_t num, u_int lines) { int i; kio_addr_t try, align; align = (*base) ? (lines ? 1<<lines : 0) : 1; if (align && (align < num)) { if (*base) { ds_dbg(s, 0, "odd IO request: num %#x align %#lx\n", num, align); align = 0; } else while (align && (align < num)) align <<= 1; } if (*base & ~(align-1)) { ds_dbg(s, 0, "odd IO request: base %#x align %#lx\n", *base, align); align = 0; } if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) { *base = s->io_offset | (*base & 0x0fff); return 0; } /* Check for an already-allocated window that must conflict with * what was asked for. It is a hack because it does not catch all * potential conflicts, just the most obvious ones. */ for (i = 0; i < MAX_IO_WIN; i++) if ((s->io[i].res) && *base && ((s->io[i].res->start & (align-1)) == *base)) return 1; for (i = 0; i < MAX_IO_WIN; i++) { if (!s->io[i].res) { s->io[i].res = pcmcia_find_io_region(*base, num, align, s); if (s->io[i].res) { *base = s->io[i].res->start; s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS); s->io[i].InUse = num; break; } else return 1; } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS)) continue; /* Try to extend top of window */ try = s->io[i].res->end + 1; if ((*base == 0) || (*base == try)) if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start, s->io[i].res->end + num, s) == 0) { *base = try; s->io[i].InUse += num; break; } /* Try to extend bottom of window */ try = s->io[i].res->start - num; if ((*base == 0) || (*base == try)) if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num, s->io[i].res->end, s) == 0) { *base = try; s->io[i].InUse += num; break; } } return (i == MAX_IO_WIN); } /* alloc_io_space */ static void release_io_space(struct pcmcia_socket *s, ioaddr_t base, ioaddr_t num) { int i; for (i = 0; i < MAX_IO_WIN; i++) { if (!s->io[i].res) continue; if ((s->io[i].res->start <= base) && (s->io[i].res->end >= base+num-1)) { s->io[i].InUse -= num; /* 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; } } } } /* release_io_space */ /** pccard_access_configuration_register * * Access_configuration_register() reads and writes configuration * registers in attribute memory. Memory window 0 is reserved for * this and the tuple reading services. */ int pcmcia_access_configuration_register(struct pcmcia_device *p_dev, conf_reg_t *reg) { struct pcmcia_socket *s; config_t *c; int addr; u_char val; if (!p_dev || !p_dev->function_config) return CS_NO_CARD; s = p_dev->socket; c = p_dev->function_config; if (!(c->state & CONFIG_LOCKED)) return CS_CONFIGURATION_LOCKED; addr = (c->ConfigBase + reg->Offset) >> 1; switch (reg->Action) { case CS_READ: pcmcia_read_cis_mem(s, 1, addr, 1, &val); reg->Value = val; break; case CS_WRITE: val = reg->Value; pcmcia_write_cis_mem(s, 1, addr, 1, &val); break; default: return CS_BAD_ARGS; break; } return CS_SUCCESS; } /* pcmcia_access_configuration_register */ EXPORT_SYMBOL(pcmcia_access_configuration_register); int pccard_get_configuration_info(struct pcmcia_socket *s, struct pcmcia_device *p_dev, config_info_t *config) { config_t *c; if (!(s->state & SOCKET_PRESENT)) return CS_NO_CARD; #ifdef CONFIG_CARDBUS if (s->state & SOCKET_CARDBUS) { memset(config, 0, sizeof(config_info_t)); config->Vcc = s->socket.Vcc; config->Vpp1 = config->Vpp2 = s->socket.Vpp; config->Option = s->cb_dev->subordinate->number; if (s->state & SOCKET_CARDBUS_CONFIG) { config->Attributes = CONF_VALID_CLIENT; config->IntType = INT_CARDBUS; config->AssignedIRQ = s->irq.AssignedIRQ; if (config->AssignedIRQ) config->Attributes |= CONF_ENABLE_IRQ; if (s->io[0].res) { config->BasePort1 = s->io[0].res->start; config->NumPorts1 = s->io[0].res->end - config->BasePort1 + 1; } } return CS_SUCCESS; } #endif if (p_dev) { c = p_dev->function_config; config->Function = p_dev->func; } else { c = NULL; config->Function = 0; } if ((c == NULL) || !(c->state & CONFIG_LOCKED)) { config->Attributes = 0; config->Vcc = s->socket.Vcc; config->Vpp1 = config->Vpp2 = s->socket.Vpp; return CS_SUCCESS; } config->Attributes = c->Attributes | CONF_VALID_CLIENT; config->Vcc = s->socket.Vcc; config->Vpp1 = config->Vpp2 = s->socket.Vpp; config->IntType = c->IntType; config->ConfigBase = c->ConfigBase; config->Status = c->Status; config->Pin = c->Pin; config->Copy = c->Copy; config->Option = c->Option; config->ExtStatus = c->ExtStatus; config->Present = config->CardValues = c->CardValues; config->IRQAttributes = c->irq.Attributes; config->AssignedIRQ = s->irq.AssignedIRQ; config->BasePort1 = c->io.BasePort1; config->NumPorts1 = c->io.NumPorts1; config->Attributes1 = c->io.Attributes1; config->BasePort2 = c->io.BasePort2; config->NumPorts2 = c->io.NumPorts2; config->Attributes2 = c->io.Attributes2; config->IOAddrLines = c->io.IOAddrLines; return CS_SUCCESS; } /* pccard_get_configuration_info */ int pcmcia_get_configuration_info(struct pcmcia_device *p_dev, config_info_t *config) { return pccard_get_configuration_info(p_dev->socket, p_dev, config); } EXPORT_SYMBOL(pcmcia_get_configuration_info); /** pcmcia_get_window */ int pcmcia_get_window(struct pcmcia_socket *s, window_handle_t *handle, int idx, win_req_t *req) { window_t *win; int w; if (!s || !(s->state & SOCKET_PRESENT)) return CS_NO_CARD; for (w = idx; w < MAX_WIN; w++) if (s->state & SOCKET_WIN_REQ(w)) break; if (w == MAX_WIN) return CS_NO_MORE_ITEMS; win = &s->win[w]; req->Base = win->ctl.res->start; req->Size = win->ctl.res->end - win->ctl.res->start + 1; req->AccessSpeed = win->ctl.speed; req->Attributes = 0; if (win->ctl.flags & MAP_ATTRIB) req->Attributes |= WIN_MEMORY_TYPE_AM; if (win->ctl.flags & MAP_ACTIVE) req->Attributes |= WIN_ENABLE; if (win->ctl.flags & MAP_16BIT) req->Attributes |= WIN_DATA_WIDTH_16; if (win->ctl.flags & MAP_USE_WAIT) req->Attributes |= WIN_USE_WAIT; *handle = win; return CS_SUCCESS; } /* pcmcia_get_window */ EXPORT_SYMBOL(pcmcia_get_window); /** pccard_get_status * * Get the current socket state bits. We don't support the latched * SocketState yet: I haven't seen any point for it. */ int pccard_get_status(struct pcmcia_socket *s, struct pcmcia_device *p_dev, cs_status_t *status) { config_t *c; int val; s->ops->get_status(s, &val); status->CardState = status->SocketState = 0; status->CardState |= (val & SS_DETECT) ? CS_EVENT_CARD_DETECT : 0; status->CardState |= (val & SS_CARDBUS) ? CS_EVENT_CB_DETECT : 0; status->CardState |= (val & SS_3VCARD) ? CS_EVENT_3VCARD : 0; status->CardState |= (val & SS_XVCARD) ? CS_EVENT_XVCARD : 0; if (s->state & SOCKET_SUSPEND) status->CardState |= CS_EVENT_PM_SUSPEND; if (!(s->state & SOCKET_PRESENT)) return CS_NO_CARD; c = (p_dev) ? p_dev->function_config : NULL; if ((c != NULL) && (c->state & CONFIG_LOCKED) && (c->IntType & (INT_MEMORY_AND_IO | INT_ZOOMED_VIDEO))) { u_char reg; if (c->CardValues & PRESENT_PIN_REPLACE) { pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_PRR)>>1, 1, ®); status->CardState |= (reg & PRR_WP_STATUS) ? CS_EVENT_WRITE_PROTECT : 0; status->CardState |= (reg & PRR_READY_STATUS) ? CS_EVENT_READY_CHANGE : 0; status->CardState |= (reg & PRR_BVD2_STATUS) ? CS_EVENT_BATTERY_LOW : 0; status->CardState |= (reg & PRR_BVD1_STATUS) ? CS_EVENT_BATTERY_DEAD : 0; } else { /* No PRR? Then assume we're always ready */ status->CardState |= CS_EVENT_READY_CHANGE; } if (c->CardValues & PRESENT_EXT_STATUS) { pcmcia_read_cis_mem(s, 1, (c->ConfigBase+CISREG_ESR)>>1, 1, ®); status->CardState |= (reg & ESR_REQ_ATTN) ? CS_EVENT_REQUEST_ATTENTION : 0; } return CS_SUCCESS; } status->CardState |= (val & SS_WRPROT) ? CS_EVENT_WRITE_PROTECT : 0; status->CardState |= (val & SS_BATDEAD) ? CS_EVENT_BATTERY_DEAD : 0; status->CardState |= (val & SS_BATWARN) ? CS_EVENT_BATTERY_LOW : 0; status->CardState |= (val & SS_READY) ? CS_EVENT_READY_CHANGE : 0; return CS_SUCCESS; } /* pccard_get_status */ int pcmcia_get_status(struct pcmcia_device *p_dev, cs_status_t *status) { return pccard_get_status(p_dev->socket, p_dev, status); } EXPORT_SYMBOL(pcmcia_get_status); /** pcmcia_get_mem_page * * Change the card address of an already open memory window. */ int pcmcia_get_mem_page(window_handle_t win, memreq_t *req) { if ((win == NULL) || (win->magic != WINDOW_MAGIC)) return CS_BAD_HANDLE; req->Page = 0; req->CardOffset = win->ctl.card_start; return CS_SUCCESS; } /* pcmcia_get_mem_page */ EXPORT_SYMBOL(pcmcia_get_mem_page); int pcmcia_map_mem_page(window_handle_t win, memreq_t *req) { struct pcmcia_socket *s; if ((win == NULL) || (win->magic != WINDOW_MAGIC)) return CS_BAD_HANDLE; if (req->Page != 0) return CS_BAD_PAGE; s = win->sock; win->ctl.card_start = req->CardOffset; if (s->ops->set_mem_map(s, &win->ctl) != 0) return CS_BAD_OFFSET; return CS_SUCCESS; } /* pcmcia_map_mem_page */ EXPORT_SYMBOL(pcmcia_map_mem_page); /** pcmcia_modify_configuration * * Modify a locked socket configuration */ int pcmcia_modify_configuration(struct pcmcia_device *p_dev, modconf_t *mod) { struct pcmcia_socket *s; config_t *c; s = p_dev->socket; c = p_dev->function_config; if (!(s->state & SOCKET_PRESENT)) return CS_NO_CARD; if (!(c->state & CONFIG_LOCKED)) return CS_CONFIGURATION_LOCKED; if (mod->Attributes & CONF_IRQ_CHANGE_VALID) { if (mod->Attributes & CONF_ENABLE_IRQ) { c->Attributes |= CONF_ENABLE_IRQ; s->socket.io_irq = s->irq.AssignedIRQ; } else { c->Attributes &= ~CONF_ENABLE_IRQ; s->socket.io_irq = 0; } s->ops->set_socket(s, &s->socket); } if (mod->Attributes & CONF_VCC_CHANGE_VALID) return CS_BAD_VCC; /* We only allow changing Vpp1 and Vpp2 to the same value */ if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) && (mod->Attributes & CONF_VPP2_CHANGE_VALID)) { if (mod->Vpp1 != mod->Vpp2) return CS_BAD_VPP; s->socket.Vpp = mod->Vpp1; if (s->ops->set_socket(s, &s->socket)) return CS_BAD_VPP; } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) || (mod->Attributes & CONF_VPP2_CHANGE_VALID)) return CS_BAD_VPP; if (mod->Attributes & CONF_IO_CHANGE_WIDTH) { pccard_io_map io_off = { 0, 0, 0, 0, 1 }; pccard_io_map io_on; int i; 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); } } return CS_SUCCESS; } /* modify_configuration */ EXPORT_SYMBOL(pcmcia_modify_configuration); 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 = p_dev->function_config; int i; 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); } } return CS_SUCCESS; } /* pcmcia_release_configuration */ /** pcmcia_release_io * * Release_io() releases the I/O ranges allocated by a client. 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, io_req_t *req) { struct pcmcia_socket *s = p_dev->socket; config_t *c = p_dev->function_config; if (!p_dev->_io ) return CS_BAD_HANDLE; p_dev->_io = 0; if ((c->io.BasePort1 != req->BasePort1) || (c->io.NumPorts1 != req->NumPorts1) || (c->io.BasePort2 != req->BasePort2) || (c->io.NumPorts2 != req->NumPorts2)) return CS_BAD_ARGS; c->state &= ~CONFIG_IO_REQ; release_io_space(s, req->BasePort1, req->NumPorts1); if (req->NumPorts2) release_io_space(s, req->BasePort2, req->NumPorts2); return CS_SUCCESS; } /* pcmcia_release_io */ static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req) { struct pcmcia_socket *s = p_dev->socket; config_t *c= p_dev->function_config; if (!p_dev->_irq) return CS_BAD_HANDLE; p_dev->_irq = 0; if (c->state & CONFIG_LOCKED) return CS_CONFIGURATION_LOCKED; if (c->irq.Attributes != req->Attributes) return CS_BAD_ATTRIBUTE; if (s->irq.AssignedIRQ != req->AssignedIRQ) return CS_BAD_IRQ; if (--s->irq.Config == 0) { c->state &= ~CONFIG_IRQ_REQ; s->irq.AssignedIRQ = 0; } if (req->Attributes & IRQ_HANDLE_PRESENT) { free_irq(req->AssignedIRQ, req->Instance); } #ifdef CONFIG_PCMCIA_PROBE pcmcia_used_irq[req->AssignedIRQ]--; #endif return CS_SUCCESS; } /* pcmcia_release_irq */ int pcmcia_release_window(window_handle_t win) { struct pcmcia_socket *s; if ((win == NULL) || (win->magic != WINDOW_MAGIC)) return CS_BAD_HANDLE; s = win->sock; if (!(win->handle->_win & CLIENT_WIN_REQ(win->index))) return CS_BAD_HANDLE; /* Shut down memory window */ win->ctl.flags &= ~MAP_ACTIVE; s->ops->set_mem_map(s, &win->ctl); s->state &= ~SOCKET_WIN_REQ(win->index); /* Release system memory */ if (win->ctl.res) { release_resource(win->ctl.res); kfree(win->ctl.res); win->ctl.res = NULL; } win->handle->_win &= ~CLIENT_WIN_REQ(win->index); win->magic = 0; return CS_SUCCESS; } /* pcmcia_release_window */ EXPORT_SYMBOL(pcmcia_release_window); int pcmcia_request_configuration(struct pcmcia_device *p_dev, config_req_t *req) { int i; u_int base; struct pcmcia_socket *s = p_dev->socket; config_t *c; pccard_io_map iomap; if (!(s->state & SOCKET_PRESENT)) return CS_NO_CARD; if (req->IntType & INT_CARDBUS) return CS_UNSUPPORTED_MODE; c = p_dev->function_config; if (c->state & CONFIG_LOCKED) return CS_CONFIGURATION_LOCKED; /* Do power control. We don't allow changes in Vcc. */ s->socket.Vpp = req->Vpp; if (s->ops->set_socket(s, &s->socket)) return CS_BAD_VPP; /* Pick memory or I/O card, DMA mode, interrupt */ c->IntType = req->IntType; c->Attributes = req->Attributes; if (req->IntType & INT_MEMORY_AND_IO) s->socket.flags |= SS_IOCARD; if (req->IntType & INT_ZOOMED_VIDEO) s->socket.flags |= SS_ZVCARD | SS_IOCARD; if (req->Attributes & CONF_ENABLE_DMA) s->socket.flags |= SS_DMA_MODE; if (req->Attributes & CONF_ENABLE_SPKR) s->socket.flags |= SS_SPKR_ENA; if (req->Attributes & CONF_ENABLE_IRQ) s->socket.io_irq = s->irq.AssignedIRQ; else s->socket.io_irq = 0; s->ops->set_socket(s, &s->socket); s->lock_count++; /* Set up CIS configuration registers */ base = c->ConfigBase = req->ConfigBase; c->CardValues = req->Present; if (req->Present & PRESENT_COPY) { c->Copy = req->Copy; pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy); } if (req->Present & PRESENT_OPTION) { if (s->functions == 1) { c->Option = req->ConfigIndex & COR_CONFIG_MASK; } else { c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK; c->Option |= COR_FUNC_ENA|COR_IREQ_ENA; if (req->Present & PRESENT_IOBASE_0) c->Option |= COR_ADDR_DECODE; } if (c->state & CONFIG_IRQ_REQ) if (!(c->irq.Attributes & IRQ_FORCED_PULSE)) c->Option |= COR_LEVEL_REQ; pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option); mdelay(40); } if (req->Present & PRESENT_STATUS) { c->Status = req->Status; pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status); } if (req->Present & PRESENT_PIN_REPLACE) { c->Pin = req->Pin; pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin); } if (req->Present & PRESENT_EXT_STATUS) { c->ExtStatus = req->ExtStatus; pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus); } if (req->Present & PRESENT_IOBASE_0) { u_char b = c->io.BasePort1 & 0xff; pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b); b = (c->io.BasePort1 >> 8) & 0xff; pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b); } if (req->Present & PRESENT_IOSIZE) { u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 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; return CS_SUCCESS; } /* pcmcia_request_configuration */ EXPORT_SYMBOL(pcmcia_request_configuration); /** pcmcia_request_io * * Request_io() reserves ranges of port addresses for a socket. * I have not implemented range sharing or alias addressing. */ int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req) { struct pcmcia_socket *s = p_dev->socket; config_t *c; if (!(s->state & SOCKET_PRESENT)) return CS_NO_CARD; if (!req) return CS_UNSUPPORTED_MODE; c = p_dev->function_config; if (c->state & CONFIG_LOCKED) return CS_CONFIGURATION_LOCKED; if (c->state & CONFIG_IO_REQ) return CS_IN_USE; if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) return CS_BAD_ATTRIBUTE; if ((req->NumPorts2 > 0) && (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) return CS_BAD_ATTRIBUTE; if (alloc_io_space(s, req->Attributes1, &req->BasePort1, req->NumPorts1, req->IOAddrLines)) return CS_IN_USE; if (req->NumPorts2) { if (alloc_io_space(s, req->Attributes2, &req->BasePort2, req->NumPorts2, req->IOAddrLines)) { release_io_space(s, req->BasePort1, req->NumPorts1); return CS_IN_USE; } } c->io = *req; c->state |= CONFIG_IO_REQ; p_dev->_io = 1; return CS_SUCCESS; } /* pcmcia_request_io */ EXPORT_SYMBOL(pcmcia_request_io); /** pcmcia_request_irq * * Request_irq() reserves an irq for this client. * * Also, since Linux only reserves irq's when they are actually * hooked, we don't guarantee that an irq will still be available * when the configuration is locked. Now that I think about it, * there might be a way to fix this using a dummy handler. */ #ifdef CONFIG_PCMCIA_PROBE static irqreturn_t test_action(int cpl, void *dev_id) { return IRQ_NONE; } #endif int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req) { struct pcmcia_socket *s = p_dev->socket; config_t *c; int ret = CS_IN_USE, irq = 0; int type; if (!(s->state & SOCKET_PRESENT)) return CS_NO_CARD; c = p_dev->function_config; if (c->state & CONFIG_LOCKED) return CS_CONFIGURATION_LOCKED; if (c->state & CONFIG_IRQ_REQ) return CS_IN_USE; /* Decide what type of interrupt we are registering */ type = 0; if (s->functions > 1) /* All of this ought to be handled higher up */ type = IRQF_SHARED; if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING) type = IRQF_SHARED; #ifdef CONFIG_PCMCIA_PROBE if (s->irq.AssignedIRQ != 0) { /* If the interrupt is already assigned, it must be the same */ irq = s->irq.AssignedIRQ; } else { int try; u32 mask = s->irq_mask; void *data = &p_dev->dev.driver; /* something unique to this device */ for (try = 0; try < 64; try++) { irq = try % 32; /* marked as available by driver, and not blocked by userspace? */ if (!((mask >> irq) & 1)) continue; /* avoid an IRQ which is already used by a PCMCIA card */ if ((try < 32) && pcmcia_used_irq[irq]) continue; /* register the correct driver, if possible, of 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, (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Handler : test_action, type, p_dev->devname, (req->Attributes & IRQ_HANDLE_PRESENT) ? req->Instance : data); if (!ret) { if (!(req->Attributes & IRQ_HANDLE_PRESENT)) free_irq(irq, data); break; } } } #endif /* only assign PCI irq if no IRQ already assigned */ if (ret && !s->irq.AssignedIRQ) { if (!s->pci_irq) return ret; type = IRQF_SHARED; irq = s->pci_irq; } if (ret && (req->Attributes & IRQ_HANDLE_PRESENT)) { if (request_irq(irq, req->Handler, type, p_dev->devname, req->Instance)) return CS_IN_USE; } /* Make sure the fact the request type was overridden is passed back */ if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) { req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING; printk(KERN_WARNING "pcmcia: request for exclusive IRQ could not be fulfilled.\n"); printk(KERN_WARNING "pcmcia: the driver needs updating to supported shared IRQ lines.\n"); } c->irq.Attributes = req->Attributes; s->irq.AssignedIRQ = req->AssignedIRQ = irq; s->irq.Config++; c->state |= CONFIG_IRQ_REQ; p_dev->_irq = 1; #ifdef CONFIG_PCMCIA_PROBE pcmcia_used_irq[irq]++; #endif return CS_SUCCESS; } /* pcmcia_request_irq */ EXPORT_SYMBOL(pcmcia_request_irq); /** pcmcia_request_window * * Request_window() establishes a mapping between card memory space * and system memory space. */ int pcmcia_request_window(struct pcmcia_device **p_dev, win_req_t *req, window_handle_t *wh) { struct pcmcia_socket *s = (*p_dev)->socket; window_t *win; u_long align; int w; if (!(s->state & SOCKET_PRESENT)) return CS_NO_CARD; if (req->Attributes & (WIN_PAGED | WIN_SHARED)) return CS_BAD_ATTRIBUTE; /* Window size defaults to smallest available */ if (req->Size == 0) req->Size = s->map_size; align = (((s->features & SS_CAP_MEM_ALIGN) || (req->Attributes & WIN_STRICT_ALIGN)) ? req->Size : s->map_size); if (req->Size & (s->map_size-1)) return CS_BAD_SIZE; if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) || (req->Base & (align-1))) return CS_BAD_BASE; if (req->Base) align = 0; /* Allocate system memory window */ for (w = 0; w < MAX_WIN; w++) if (!(s->state & SOCKET_WIN_REQ(w))) break; if (w == MAX_WIN) return CS_OUT_OF_RESOURCE; win = &s->win[w]; win->magic = WINDOW_MAGIC; win->index = w; win->handle = *p_dev; win->sock = s; if (!(s->features & SS_CAP_STATIC_MAP)) { win->ctl.res = pcmcia_find_mem_region(req->Base, req->Size, align, (req->Attributes & WIN_MAP_BELOW_1MB), s); if (!win->ctl.res) return CS_IN_USE; } (*p_dev)->_win |= CLIENT_WIN_REQ(w); /* Configure the socket controller */ win->ctl.map = w+1; win->ctl.flags = 0; win->ctl.speed = req->AccessSpeed; if (req->Attributes & WIN_MEMORY_TYPE) win->ctl.flags |= MAP_ATTRIB; if (req->Attributes & WIN_ENABLE) win->ctl.flags |= MAP_ACTIVE; if (req->Attributes & WIN_DATA_WIDTH_16) win->ctl.flags |= MAP_16BIT; if (req->Attributes & WIN_USE_WAIT) win->ctl.flags |= MAP_USE_WAIT; win->ctl.card_start = 0; if (s->ops->set_mem_map(s, &win->ctl) != 0) return CS_BAD_ARGS; s->state |= SOCKET_WIN_REQ(w); /* Return window handle */ if (s->features & SS_CAP_STATIC_MAP) { req->Base = win->ctl.static_start; } else { req->Base = win->ctl.res->start; } *wh = win; return CS_SUCCESS; } /* pcmcia_request_window */ EXPORT_SYMBOL(pcmcia_request_window); void pcmcia_disable_device(struct pcmcia_device *p_dev) { pcmcia_release_configuration(p_dev); pcmcia_release_io(p_dev, &p_dev->io); pcmcia_release_irq(p_dev, &p_dev->irq); if (&p_dev->win) pcmcia_release_window(p_dev->win); } EXPORT_SYMBOL(pcmcia_disable_device);