/* * drivers/pcmcia/m32r_pcc.c * * Device driver for the PCMCIA functionality of M32R. * * Copyright (c) 2001, 2002, 2003, 2004 * Hiroyuki Kondo, Naoto Sugai, Hayato Fujiwara */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> #include <linux/types.h> #include <linux/fcntl.h> #include <linux/string.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/timer.h> #include <linux/slab.h> #include <linux/ioport.h> #include <linux/delay.h> #include <linux/workqueue.h> #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/bitops.h> #include <asm/irq.h> #include <asm/io.h> #include <asm/system.h> #include <asm/addrspace.h> #include <pcmcia/cs_types.h> #include <pcmcia/ss.h> #include <pcmcia/cs.h> /* XXX: should be moved into asm/irq.h */ #define PCC0_IRQ 24 #define PCC1_IRQ 25 #include "m32r_pcc.h" #define CHAOS_PCC_DEBUG #ifdef CHAOS_PCC_DEBUG static volatile u_short dummy_readbuf; #endif #define PCC_DEBUG_DBEX #ifdef DEBUG static int m32r_pcc_debug; module_param(m32r_pcc_debug, int, 0644); #define debug(lvl, fmt, arg...) do { \ if (m32r_pcc_debug > (lvl)) \ printk(KERN_DEBUG "m32r_pcc: " fmt , ## arg); \ } while (0) #else #define debug(n, args...) do { } while (0) #endif /* Poll status interval -- 0 means default to interrupt */ static int poll_interval = 0; typedef enum pcc_space { as_none = 0, as_comm, as_attr, as_io } pcc_as_t; typedef struct pcc_socket { u_short type, flags; struct pcmcia_socket socket; unsigned int number; unsigned int ioaddr; u_long mapaddr; u_long base; /* PCC register base */ u_char cs_irq, intr; pccard_io_map io_map[MAX_IO_WIN]; pccard_mem_map mem_map[MAX_WIN]; u_char io_win; u_char mem_win; pcc_as_t current_space; u_char last_iodbex; #ifdef CHAOS_PCC_DEBUG u_char last_iosize; #endif #ifdef CONFIG_PROC_FS struct proc_dir_entry *proc; #endif } pcc_socket_t; static int pcc_sockets = 0; static pcc_socket_t socket[M32R_MAX_PCC] = { { 0, }, /* ... */ }; /*====================================================================*/ static unsigned int pcc_get(u_short, unsigned int); static void pcc_set(u_short, unsigned int , unsigned int ); static DEFINE_SPINLOCK(pcc_lock); void pcc_iorw(int sock, unsigned long port, void *buf, size_t size, size_t nmemb, int wr, int flag) { u_long addr; u_long flags; int need_ex; #ifdef PCC_DEBUG_DBEX int _dbex; #endif pcc_socket_t *t = &socket[sock]; #ifdef CHAOS_PCC_DEBUG int map_changed = 0; #endif /* Need lock ? */ spin_lock_irqsave(&pcc_lock, flags); /* * Check if need dbex */ need_ex = (size > 1 && flag == 0) ? PCMOD_DBEX : 0; #ifdef PCC_DEBUG_DBEX _dbex = need_ex; need_ex = 0; #endif /* * calculate access address */ addr = t->mapaddr + port - t->ioaddr + KSEG1; /* XXX */ /* * Check current mapping */ if (t->current_space != as_io || t->last_iodbex != need_ex) { u_long cbsz; /* * Disable first */ pcc_set(sock, PCCR, 0); /* * Set mode and io address */ cbsz = (t->flags & MAP_16BIT) ? 0 : PCMOD_CBSZ; pcc_set(sock, PCMOD, PCMOD_AS_IO | cbsz | need_ex); pcc_set(sock, PCADR, addr & 0x1ff00000); /* * Enable and read it */ pcc_set(sock, PCCR, 1); #ifdef CHAOS_PCC_DEBUG #if 0 map_changed = (t->current_space == as_attr && size == 2); /* XXX */ #else map_changed = 1; #endif #endif t->current_space = as_io; } /* * access to IO space */ if (size == 1) { /* Byte */ unsigned char *bp = (unsigned char *)buf; #ifdef CHAOS_DEBUG if (map_changed) { dummy_readbuf = readb(addr); } #endif if (wr) { /* write Byte */ while (nmemb--) { writeb(*bp++, addr); } } else { /* read Byte */ while (nmemb--) { *bp++ = readb(addr); } } } else { /* Word */ unsigned short *bp = (unsigned short *)buf; #ifdef CHAOS_PCC_DEBUG if (map_changed) { dummy_readbuf = readw(addr); } #endif if (wr) { /* write Word */ while (nmemb--) { #ifdef PCC_DEBUG_DBEX if (_dbex) { unsigned char *cp = (unsigned char *)bp; unsigned short tmp; tmp = cp[1] << 8 | cp[0]; writew(tmp, addr); bp++; } else #endif writew(*bp++, addr); } } else { /* read Word */ while (nmemb--) { #ifdef PCC_DEBUG_DBEX if (_dbex) { unsigned char *cp = (unsigned char *)bp; unsigned short tmp; tmp = readw(addr); cp[0] = tmp & 0xff; cp[1] = (tmp >> 8) & 0xff; bp++; } else #endif *bp++ = readw(addr); } } } #if 1 /* addr is no longer used */ if ((addr = pcc_get(sock, PCIRC)) & PCIRC_BWERR) { printk("m32r_pcc: BWERR detected : port 0x%04lx : iosize %dbit\n", port, size * 8); pcc_set(sock, PCIRC, addr); } #endif /* * save state */ t->last_iosize = size; t->last_iodbex = need_ex; /* Need lock ? */ spin_unlock_irqrestore(&pcc_lock,flags); return; } void pcc_ioread(int sock, unsigned long port, void *buf, size_t size, size_t nmemb, int flag) { pcc_iorw(sock, port, buf, size, nmemb, 0, flag); } void pcc_iowrite(int sock, unsigned long port, void *buf, size_t size, size_t nmemb, int flag) { pcc_iorw(sock, port, buf, size, nmemb, 1, flag); } /*====================================================================*/ #define IS_REGISTERED 0x2000 #define IS_ALIVE 0x8000 typedef struct pcc_t { char *name; u_short flags; } pcc_t; static pcc_t pcc[] = { { "xnux2", 0 }, { "xnux2", 0 }, }; static irqreturn_t pcc_interrupt(int, void *); /*====================================================================*/ static struct timer_list poll_timer; static unsigned int pcc_get(u_short sock, unsigned int reg) { return inl(socket[sock].base + reg); } static void pcc_set(u_short sock, unsigned int reg, unsigned int data) { outl(data, socket[sock].base + reg); } /*====================================================================== See if a card is present, powered up, in IO mode, and already bound to a (non PC Card) Linux driver. We leave these alone. We make an exception for cards that seem to be serial devices. ======================================================================*/ static int __init is_alive(u_short sock) { unsigned int stat; unsigned int f; stat = pcc_get(sock, PCIRC); f = (stat & (PCIRC_CDIN1 | PCIRC_CDIN2)) >> 16; if(!f){ printk("m32r_pcc: No Card is detected at socket %d : stat = 0x%08x\n",stat,sock); return 0; } if(f!=3) printk("m32r_pcc: Insertion fail (%.8x) at socket %d\n",stat,sock); else printk("m32r_pcc: Card is Inserted at socket %d(%.8x)\n",sock,stat); return 0; } static void add_pcc_socket(ulong base, int irq, ulong mapaddr, unsigned int ioaddr) { pcc_socket_t *t = &socket[pcc_sockets]; /* add sockets */ t->ioaddr = ioaddr; t->mapaddr = mapaddr; t->base = base; #ifdef CHAOS_PCC_DEBUG t->flags = MAP_16BIT; #else t->flags = 0; #endif if (is_alive(pcc_sockets)) t->flags |= IS_ALIVE; /* add pcc */ if (t->base > 0) { request_region(t->base, 0x20, "m32r-pcc"); } printk(KERN_INFO " %s ", pcc[pcc_sockets].name); printk("pcc at 0x%08lx\n", t->base); /* Update socket interrupt information, capabilities */ t->socket.features |= (SS_CAP_PCCARD | SS_CAP_STATIC_MAP); t->socket.map_size = M32R_PCC_MAPSIZE; t->socket.io_offset = ioaddr; /* use for io access offset */ t->socket.irq_mask = 0; t->socket.pci_irq = 2 + pcc_sockets; /* XXX */ request_irq(irq, pcc_interrupt, 0, "m32r-pcc", pcc_interrupt); pcc_sockets++; return; } /*====================================================================*/ static irqreturn_t pcc_interrupt(int irq, void *dev) { int i, j, irc; u_int events, active; int handled = 0; debug(4, "m32r: pcc_interrupt(%d)\n", irq); for (j = 0; j < 20; j++) { active = 0; for (i = 0; i < pcc_sockets; i++) { if ((socket[i].cs_irq != irq) && (socket[i].socket.pci_irq != irq)) continue; handled = 1; irc = pcc_get(i, PCIRC); irc >>=16; debug(2, "m32r-pcc:interrupt: socket %d pcirc 0x%02x ", i, irc); if (!irc) continue; events = (irc) ? SS_DETECT : 0; events |= (pcc_get(i,PCCR) & PCCR_PCEN) ? SS_READY : 0; debug(2, " event 0x%02x\n", events); if (events) pcmcia_parse_events(&socket[i].socket, events); active |= events; active = 0; } if (!active) break; } if (j == 20) printk(KERN_NOTICE "m32r-pcc: infinite loop in interrupt handler\n"); debug(4, "m32r-pcc: interrupt done\n"); return IRQ_RETVAL(handled); } /* pcc_interrupt */ static void pcc_interrupt_wrapper(u_long data) { pcc_interrupt(0, NULL); init_timer(&poll_timer); poll_timer.expires = jiffies + poll_interval; add_timer(&poll_timer); } /*====================================================================*/ static int _pcc_get_status(u_short sock, u_int *value) { u_int status; status = pcc_get(sock,PCIRC); *value = ((status & PCIRC_CDIN1) && (status & PCIRC_CDIN2)) ? SS_DETECT : 0; status = pcc_get(sock,PCCR); #if 0 *value |= (status & PCCR_PCEN) ? SS_READY : 0; #else *value |= SS_READY; /* XXX: always */ #endif status = pcc_get(sock,PCCSIGCR); *value |= (status & PCCSIGCR_VEN) ? SS_POWERON : 0; debug(3, "m32r-pcc: GetStatus(%d) = %#4.4x\n", sock, *value); return 0; } /* _get_status */ /*====================================================================*/ static int _pcc_set_socket(u_short sock, socket_state_t *state) { u_long reg = 0; debug(3, "m32r-pcc: SetSocket(%d, flags %#3.3x, Vcc %d, Vpp %d, " "io_irq %d, csc_mask %#2.2x)", sock, state->flags, state->Vcc, state->Vpp, state->io_irq, state->csc_mask); if (state->Vcc) { /* * 5V only */ if (state->Vcc == 50) { reg |= PCCSIGCR_VEN; } else { return -EINVAL; } } if (state->flags & SS_RESET) { debug(3, ":RESET\n"); reg |= PCCSIGCR_CRST; } if (state->flags & SS_OUTPUT_ENA){ debug(3, ":OUTPUT_ENA\n"); /* bit clear */ } else { reg |= PCCSIGCR_SEN; } pcc_set(sock,PCCSIGCR,reg); #ifdef DEBUG if(state->flags & SS_IOCARD){ debug(3, ":IOCARD"); } if (state->flags & SS_PWR_AUTO) { debug(3, ":PWR_AUTO"); } if (state->csc_mask & SS_DETECT) debug(3, ":csc-SS_DETECT"); if (state->flags & SS_IOCARD) { if (state->csc_mask & SS_STSCHG) debug(3, ":STSCHG"); } else { if (state->csc_mask & SS_BATDEAD) debug(3, ":BATDEAD"); if (state->csc_mask & SS_BATWARN) debug(3, ":BATWARN"); if (state->csc_mask & SS_READY) debug(3, ":READY"); } debug(3, "\n"); #endif return 0; } /* _set_socket */ /*====================================================================*/ static int _pcc_set_io_map(u_short sock, struct pccard_io_map *io) { u_char map; debug(3, "m32r-pcc: SetIOMap(%d, %d, %#2.2x, %d ns, " "%#x-%#x)\n", sock, io->map, io->flags, io->speed, io->start, io->stop); map = io->map; return 0; } /* _set_io_map */ /*====================================================================*/ static int _pcc_set_mem_map(u_short sock, struct pccard_mem_map *mem) { u_char map = mem->map; u_long mode; u_long addr; pcc_socket_t *t = &socket[sock]; #ifdef CHAOS_PCC_DEBUG #if 0 pcc_as_t last = t->current_space; #endif #endif debug(3, "m32r-pcc: SetMemMap(%d, %d, %#2.2x, %d ns, " "%#lx, %#x)\n", sock, map, mem->flags, mem->speed, mem->static_start, mem->card_start); /* * sanity check */ if ((map > MAX_WIN) || (mem->card_start > 0x3ffffff)){ return -EINVAL; } /* * de-activate */ if ((mem->flags & MAP_ACTIVE) == 0) { t->current_space = as_none; return 0; } /* * Disable first */ pcc_set(sock, PCCR, 0); /* * Set mode */ if (mem->flags & MAP_ATTRIB) { mode = PCMOD_AS_ATTRIB | PCMOD_CBSZ; t->current_space = as_attr; } else { mode = 0; /* common memory */ t->current_space = as_comm; } pcc_set(sock, PCMOD, mode); /* * Set address */ addr = t->mapaddr + (mem->card_start & M32R_PCC_MAPMASK); pcc_set(sock, PCADR, addr); mem->static_start = addr + mem->card_start; /* * Enable again */ pcc_set(sock, PCCR, 1); #ifdef CHAOS_PCC_DEBUG #if 0 if (last != as_attr) { #else if (1) { #endif dummy_readbuf = *(u_char *)(addr + KSEG1); } #endif return 0; } /* _set_mem_map */ #if 0 /* driver model ordering issue */ /*====================================================================== Routines for accessing socket information and register dumps via /proc/bus/pccard/... ======================================================================*/ static ssize_t show_info(struct class_device *class_dev, char *buf) { pcc_socket_t *s = container_of(class_dev, struct pcc_socket, socket.dev); return sprintf(buf, "type: %s\nbase addr: 0x%08lx\n", pcc[s->type].name, s->base); } static ssize_t show_exca(struct class_device *class_dev, char *buf) { /* FIXME */ return 0; } static CLASS_DEVICE_ATTR(info, S_IRUGO, show_info, NULL); static CLASS_DEVICE_ATTR(exca, S_IRUGO, show_exca, NULL); #endif /*====================================================================*/ /* this is horribly ugly... proper locking needs to be done here at * some time... */ #define LOCKED(x) do { \ int retval; \ unsigned long flags; \ spin_lock_irqsave(&pcc_lock, flags); \ retval = x; \ spin_unlock_irqrestore(&pcc_lock, flags); \ return retval; \ } while (0) static int pcc_get_status(struct pcmcia_socket *s, u_int *value) { unsigned int sock = container_of(s, struct pcc_socket, socket)->number; if (socket[sock].flags & IS_ALIVE) { *value = 0; return -EINVAL; } LOCKED(_pcc_get_status(sock, value)); } static int pcc_set_socket(struct pcmcia_socket *s, socket_state_t *state) { unsigned int sock = container_of(s, struct pcc_socket, socket)->number; if (socket[sock].flags & IS_ALIVE) return -EINVAL; LOCKED(_pcc_set_socket(sock, state)); } static int pcc_set_io_map(struct pcmcia_socket *s, struct pccard_io_map *io) { unsigned int sock = container_of(s, struct pcc_socket, socket)->number; if (socket[sock].flags & IS_ALIVE) return -EINVAL; LOCKED(_pcc_set_io_map(sock, io)); } static int pcc_set_mem_map(struct pcmcia_socket *s, struct pccard_mem_map *mem) { unsigned int sock = container_of(s, struct pcc_socket, socket)->number; if (socket[sock].flags & IS_ALIVE) return -EINVAL; LOCKED(_pcc_set_mem_map(sock, mem)); } static int pcc_init(struct pcmcia_socket *s) { debug(4, "m32r-pcc: init call\n"); return 0; } static struct pccard_operations pcc_operations = { .init = pcc_init, .get_status = pcc_get_status, .set_socket = pcc_set_socket, .set_io_map = pcc_set_io_map, .set_mem_map = pcc_set_mem_map, }; /*====================================================================*/ static struct device_driver pcc_driver = { .name = "pcc", .bus = &platform_bus_type, .suspend = pcmcia_socket_dev_suspend, .resume = pcmcia_socket_dev_resume, }; static struct platform_device pcc_device = { .name = "pcc", .id = 0, }; /*====================================================================*/ static int __init init_m32r_pcc(void) { int i, ret; ret = driver_register(&pcc_driver); if (ret) return ret; ret = platform_device_register(&pcc_device); if (ret){ driver_unregister(&pcc_driver); return ret; } printk(KERN_INFO "m32r PCC probe:\n"); pcc_sockets = 0; add_pcc_socket(M32R_PCC0_BASE, PCC0_IRQ, M32R_PCC0_MAPBASE, 0x1000); #ifdef CONFIG_M32RPCC_SLOT2 add_pcc_socket(M32R_PCC1_BASE, PCC1_IRQ, M32R_PCC1_MAPBASE, 0x2000); #endif if (pcc_sockets == 0) { printk("socket is not found.\n"); platform_device_unregister(&pcc_device); driver_unregister(&pcc_driver); return -ENODEV; } /* Set up interrupt handler(s) */ for (i = 0 ; i < pcc_sockets ; i++) { socket[i].socket.dev.parent = &pcc_device.dev; socket[i].socket.ops = &pcc_operations; socket[i].socket.resource_ops = &pccard_static_ops; socket[i].socket.owner = THIS_MODULE; socket[i].number = i; ret = pcmcia_register_socket(&socket[i].socket); if (!ret) socket[i].flags |= IS_REGISTERED; #if 0 /* driver model ordering issue */ class_device_create_file(&socket[i].socket.dev, &class_device_attr_info); class_device_create_file(&socket[i].socket.dev, &class_device_attr_exca); #endif } /* Finally, schedule a polling interrupt */ if (poll_interval != 0) { poll_timer.function = pcc_interrupt_wrapper; poll_timer.data = 0; init_timer(&poll_timer); poll_timer.expires = jiffies + poll_interval; add_timer(&poll_timer); } return 0; } /* init_m32r_pcc */ static void __exit exit_m32r_pcc(void) { int i; for (i = 0; i < pcc_sockets; i++) if (socket[i].flags & IS_REGISTERED) pcmcia_unregister_socket(&socket[i].socket); platform_device_unregister(&pcc_device); if (poll_interval != 0) del_timer_sync(&poll_timer); driver_unregister(&pcc_driver); } /* exit_m32r_pcc */ module_init(init_m32r_pcc); module_exit(exit_m32r_pcc); MODULE_LICENSE("Dual MPL/GPL"); /*====================================================================*/