/* * * Alchemy Semi Au1000 pcmcia driver * * Copyright 2001-2003 MontaVista Software Inc. * Author: MontaVista Software, Inc. * ppopov@embeddedalley.com or source@mvista.com * * Copyright 2004 Pete Popov, Embedded Alley Solutions, Inc. * Updated the driver to 2.6. Followed the sa11xx API and largely * copied many of the hardware independent functions. * * ######################################################################## * * This program is free software; you can distribute it and/or modify it * under the terms of the GNU General Public License (Version 2) as * published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. * * ######################################################################## * * */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/cpufreq.h> #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/timer.h> #include <linux/mm.h> #include <linux/notifier.h> #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/platform_device.h> #include <asm/io.h> #include <asm/irq.h> #include <asm/system.h> #include <asm/mach-au1x00/au1000.h> #include "au1000_generic.h" MODULE_LICENSE("GPL"); MODULE_AUTHOR("Pete Popov <ppopov@embeddedalley.com>"); MODULE_DESCRIPTION("Linux PCMCIA Card Services: Au1x00 Socket Controller"); #if 0 #define debug(x,args...) printk(KERN_DEBUG "%s: " x, __func__ , ##args) #else #define debug(x,args...) #endif #define MAP_SIZE 0x100000 extern struct au1000_pcmcia_socket au1000_pcmcia_socket[]; #define PCMCIA_SOCKET(x) (au1000_pcmcia_socket + (x)) #define to_au1000_socket(x) container_of(x, struct au1000_pcmcia_socket, socket) /* Some boards like to support CF cards as IDE root devices, so they * grab pcmcia sockets directly. */ u32 *pcmcia_base_vaddrs[2]; extern const unsigned long mips_io_port_base; DECLARE_MUTEX(pcmcia_sockets_lock); static int (*au1x00_pcmcia_hw_init[])(struct device *dev) = { au1x_board_init, }; static int au1x00_pcmcia_skt_state(struct au1000_pcmcia_socket *skt) { struct pcmcia_state state; unsigned int stat; memset(&state, 0, sizeof(struct pcmcia_state)); skt->ops->socket_state(skt, &state); stat = state.detect ? SS_DETECT : 0; stat |= state.ready ? SS_READY : 0; stat |= state.wrprot ? SS_WRPROT : 0; stat |= state.vs_3v ? SS_3VCARD : 0; stat |= state.vs_Xv ? SS_XVCARD : 0; stat |= skt->cs_state.Vcc ? SS_POWERON : 0; if (skt->cs_state.flags & SS_IOCARD) stat |= state.bvd1 ? SS_STSCHG : 0; else { if (state.bvd1 == 0) stat |= SS_BATDEAD; else if (state.bvd2 == 0) stat |= SS_BATWARN; } return stat; } /* * au100_pcmcia_config_skt * * Convert PCMCIA socket state to our socket configure structure. */ static int au1x00_pcmcia_config_skt(struct au1000_pcmcia_socket *skt, socket_state_t *state) { int ret; ret = skt->ops->configure_socket(skt, state); if (ret == 0) { skt->cs_state = *state; } if (ret < 0) debug("unable to configure socket %d\n", skt->nr); return ret; } /* au1x00_pcmcia_sock_init() * * (Re-)Initialise the socket, turning on status interrupts * and PCMCIA bus. This must wait for power to stabilise * so that the card status signals report correctly. * * Returns: 0 */ static int au1x00_pcmcia_sock_init(struct pcmcia_socket *sock) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); debug("initializing socket %u\n", skt->nr); skt->ops->socket_init(skt); return 0; } /* * au1x00_pcmcia_suspend() * * Remove power on the socket, disable IRQs from the card. * Turn off status interrupts, and disable the PCMCIA bus. * * Returns: 0 */ static int au1x00_pcmcia_suspend(struct pcmcia_socket *sock) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); debug("suspending socket %u\n", skt->nr); skt->ops->socket_suspend(skt); return 0; } static DEFINE_SPINLOCK(status_lock); /* * au1x00_check_status() */ static void au1x00_check_status(struct au1000_pcmcia_socket *skt) { unsigned int events; debug("entering PCMCIA monitoring thread\n"); do { unsigned int status; unsigned long flags; status = au1x00_pcmcia_skt_state(skt); spin_lock_irqsave(&status_lock, flags); events = (status ^ skt->status) & skt->cs_state.csc_mask; skt->status = status; spin_unlock_irqrestore(&status_lock, flags); debug("events: %s%s%s%s%s%s\n", events == 0 ? "<NONE>" : "", events & SS_DETECT ? "DETECT " : "", events & SS_READY ? "READY " : "", events & SS_BATDEAD ? "BATDEAD " : "", events & SS_BATWARN ? "BATWARN " : "", events & SS_STSCHG ? "STSCHG " : ""); if (events) pcmcia_parse_events(&skt->socket, events); } while (events); } /* * au1x00_pcmcia_poll_event() * Let's poll for events in addition to IRQs since IRQ only is unreliable... */ static void au1x00_pcmcia_poll_event(unsigned long dummy) { struct au1000_pcmcia_socket *skt = (struct au1000_pcmcia_socket *)dummy; debug("polling for events\n"); mod_timer(&skt->poll_timer, jiffies + AU1000_PCMCIA_POLL_PERIOD); au1x00_check_status(skt); } /* au1x00_pcmcia_get_status() * * From the sa11xx_core.c: * Implements the get_status() operation for the in-kernel PCMCIA * service (formerly SS_GetStatus in Card Services). Essentially just * fills in bits in `status' according to internal driver state or * the value of the voltage detect chipselect register. * * As a debugging note, during card startup, the PCMCIA core issues * three set_socket() commands in a row the first with RESET deasserted, * the second with RESET asserted, and the last with RESET deasserted * again. Following the third set_socket(), a get_status() command will * be issued. The kernel is looking for the SS_READY flag (see * setup_socket(), reset_socket(), and unreset_socket() in cs.c). * * Returns: 0 */ static int au1x00_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); skt->status = au1x00_pcmcia_skt_state(skt); *status = skt->status; return 0; } /* au1x00_pcmcia_set_socket() * Implements the set_socket() operation for the in-kernel PCMCIA * service (formerly SS_SetSocket in Card Services). We more or * less punt all of this work and let the kernel handle the details * of power configuration, reset, &c. We also record the value of * `state' in order to regurgitate it to the PCMCIA core later. * * Returns: 0 */ static int au1x00_pcmcia_set_socket(struct pcmcia_socket *sock, socket_state_t *state) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); debug("for sock %u\n", skt->nr); debug("\tmask: %s%s%s%s%s%s\n\tflags: %s%s%s%s%s%s\n", (state->csc_mask==0)?"<NONE>":"", (state->csc_mask&SS_DETECT)?"DETECT ":"", (state->csc_mask&SS_READY)?"READY ":"", (state->csc_mask&SS_BATDEAD)?"BATDEAD ":"", (state->csc_mask&SS_BATWARN)?"BATWARN ":"", (state->csc_mask&SS_STSCHG)?"STSCHG ":"", (state->flags==0)?"<NONE>":"", (state->flags&SS_PWR_AUTO)?"PWR_AUTO ":"", (state->flags&SS_IOCARD)?"IOCARD ":"", (state->flags&SS_RESET)?"RESET ":"", (state->flags&SS_SPKR_ENA)?"SPKR_ENA ":"", (state->flags&SS_OUTPUT_ENA)?"OUTPUT_ENA ":""); debug("\tVcc %d Vpp %d irq %d\n", state->Vcc, state->Vpp, state->io_irq); return au1x00_pcmcia_config_skt(skt, state); } int au1x00_pcmcia_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *map) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); unsigned int speed; if(map->map>=MAX_IO_WIN){ debug("map (%d) out of range\n", map->map); return -1; } if(map->flags&MAP_ACTIVE){ speed=(map->speed>0)?map->speed:AU1000_PCMCIA_IO_SPEED; skt->spd_io[map->map] = speed; } map->start=(ioaddr_t)(u32)skt->virt_io; map->stop=map->start+MAP_SIZE; return 0; } /* au1x00_pcmcia_set_io_map() */ static int au1x00_pcmcia_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *map) { struct au1000_pcmcia_socket *skt = to_au1000_socket(sock); unsigned short speed = map->speed; if(map->map>=MAX_WIN){ debug("map (%d) out of range\n", map->map); return -1; } if (map->flags & MAP_ATTRIB) { skt->spd_attr[map->map] = speed; skt->spd_mem[map->map] = 0; } else { skt->spd_attr[map->map] = 0; skt->spd_mem[map->map] = speed; } if (map->flags & MAP_ATTRIB) { map->static_start = skt->phys_attr + map->card_start; } else { map->static_start = skt->phys_mem + map->card_start; } debug("set_mem_map %d start %08lx card_start %08x\n", map->map, map->static_start, map->card_start); return 0; } /* au1x00_pcmcia_set_mem_map() */ static struct pccard_operations au1x00_pcmcia_operations = { .init = au1x00_pcmcia_sock_init, .suspend = au1x00_pcmcia_suspend, .get_status = au1x00_pcmcia_get_status, .set_socket = au1x00_pcmcia_set_socket, .set_io_map = au1x00_pcmcia_set_io_map, .set_mem_map = au1x00_pcmcia_set_mem_map, }; static const char *skt_names[] = { "PCMCIA socket 0", "PCMCIA socket 1", }; struct skt_dev_info { int nskt; }; int au1x00_pcmcia_socket_probe(struct device *dev, struct pcmcia_low_level *ops, int first, int nr) { struct skt_dev_info *sinfo; struct au1000_pcmcia_socket *skt; int ret, i; sinfo = kzalloc(sizeof(struct skt_dev_info), GFP_KERNEL); if (!sinfo) { ret = -ENOMEM; goto out; } sinfo->nskt = nr; /* * Initialise the per-socket structure. */ for (i = 0; i < nr; i++) { skt = PCMCIA_SOCKET(i); memset(skt, 0, sizeof(*skt)); skt->socket.resource_ops = &pccard_static_ops; skt->socket.ops = &au1x00_pcmcia_operations; skt->socket.owner = ops->owner; skt->socket.dev.parent = dev; init_timer(&skt->poll_timer); skt->poll_timer.function = au1x00_pcmcia_poll_event; skt->poll_timer.data = (unsigned long)skt; skt->poll_timer.expires = jiffies + AU1000_PCMCIA_POLL_PERIOD; skt->nr = first + i; skt->irq = 255; skt->dev = dev; skt->ops = ops; skt->res_skt.name = skt_names[skt->nr]; skt->res_io.name = "io"; skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY; skt->res_mem.name = "memory"; skt->res_mem.flags = IORESOURCE_MEM; skt->res_attr.name = "attribute"; skt->res_attr.flags = IORESOURCE_MEM; /* * PCMCIA client drivers use the inb/outb macros to access the * IO registers. Since mips_io_port_base is added to the * access address of the mips implementation of inb/outb, * we need to subtract it here because we want to access the * I/O or MEM address directly, without going through this * "mips_io_port_base" mechanism. */ if (i == 0) { skt->virt_io = (void *) (ioremap((phys_t)AU1X_SOCK0_IO, 0x1000) - (u32)mips_io_port_base); skt->phys_attr = AU1X_SOCK0_PSEUDO_PHYS_ATTR; skt->phys_mem = AU1X_SOCK0_PSEUDO_PHYS_MEM; } #ifndef CONFIG_MIPS_XXS1500 else { skt->virt_io = (void *) (ioremap((phys_t)AU1X_SOCK1_IO, 0x1000) - (u32)mips_io_port_base); skt->phys_attr = AU1X_SOCK1_PSEUDO_PHYS_ATTR; skt->phys_mem = AU1X_SOCK1_PSEUDO_PHYS_MEM; } #endif pcmcia_base_vaddrs[i] = (u32 *)skt->virt_io; ret = ops->hw_init(skt); skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD; skt->socket.irq_mask = 0; skt->socket.map_size = MAP_SIZE; skt->socket.pci_irq = skt->irq; skt->socket.io_offset = (unsigned long)skt->virt_io; skt->status = au1x00_pcmcia_skt_state(skt); ret = pcmcia_register_socket(&skt->socket); if (ret) goto out_err; WARN_ON(skt->socket.sock != i); add_timer(&skt->poll_timer); } dev_set_drvdata(dev, sinfo); return 0; out_err: flush_scheduled_work(); ops->hw_shutdown(skt); while (i-- > 0) { skt = PCMCIA_SOCKET(i); del_timer_sync(&skt->poll_timer); pcmcia_unregister_socket(&skt->socket); flush_scheduled_work(); if (i == 0) { iounmap(skt->virt_io + (u32)mips_io_port_base); skt->virt_io = NULL; } #ifndef CONFIG_MIPS_XXS1500 else { iounmap(skt->virt_io + (u32)mips_io_port_base); skt->virt_io = NULL; } #endif ops->hw_shutdown(skt); } kfree(sinfo); out: return ret; } int au1x00_drv_pcmcia_remove(struct device *dev) { struct skt_dev_info *sinfo = dev_get_drvdata(dev); int i; down(&pcmcia_sockets_lock); dev_set_drvdata(dev, NULL); for (i = 0; i < sinfo->nskt; i++) { struct au1000_pcmcia_socket *skt = PCMCIA_SOCKET(i); del_timer_sync(&skt->poll_timer); pcmcia_unregister_socket(&skt->socket); flush_scheduled_work(); skt->ops->hw_shutdown(skt); au1x00_pcmcia_config_skt(skt, &dead_socket); iounmap(skt->virt_io + (u32)mips_io_port_base); skt->virt_io = NULL; } kfree(sinfo); up(&pcmcia_sockets_lock); return 0; } /* * PCMCIA "Driver" API */ static int au1x00_drv_pcmcia_probe(struct device *dev) { int i, ret = -ENODEV; down(&pcmcia_sockets_lock); for (i=0; i < ARRAY_SIZE(au1x00_pcmcia_hw_init); i++) { ret = au1x00_pcmcia_hw_init[i](dev); if (ret == 0) break; } up(&pcmcia_sockets_lock); return ret; } static struct device_driver au1x00_pcmcia_driver = { .probe = au1x00_drv_pcmcia_probe, .remove = au1x00_drv_pcmcia_remove, .name = "au1x00-pcmcia", .bus = &platform_bus_type, .suspend = pcmcia_socket_dev_suspend, .resume = pcmcia_socket_dev_resume, }; /* au1x00_pcmcia_init() * * This routine performs low-level PCMCIA initialization and then * registers this socket driver with Card Services. * * Returns: 0 on success, -ve error code on failure */ static int __init au1x00_pcmcia_init(void) { int error = 0; if ((error = driver_register(&au1x00_pcmcia_driver))) return error; return error; } /* au1x00_pcmcia_exit() * Invokes the low-level kernel service to free IRQs associated with this * socket controller and reset GPIO edge detection. */ static void __exit au1x00_pcmcia_exit(void) { driver_unregister(&au1x00_pcmcia_driver); } module_init(au1x00_pcmcia_init); module_exit(au1x00_pcmcia_exit);