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Diffstat (limited to 'arch/arm/kernel/ecard.c')
| -rw-r--r-- | arch/arm/kernel/ecard.c | 1231 |
1 files changed, 0 insertions, 1231 deletions
diff --git a/arch/arm/kernel/ecard.c b/arch/arm/kernel/ecard.c deleted file mode 100644 index 4dd0edab6a65..000000000000 --- a/arch/arm/kernel/ecard.c +++ /dev/null @@ -1,1231 +0,0 @@ -/* - * linux/arch/arm/kernel/ecard.c - * - * Copyright 1995-2001 Russell King - * - * 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. - * - * Find all installed expansion cards, and handle interrupts from them. - * - * Created from information from Acorns RiscOS3 PRMs - * - * 08-Dec-1996 RMK Added code for the 9'th expansion card - the ether - * podule slot. - * 06-May-1997 RMK Added blacklist for cards whose loader doesn't work. - * 12-Sep-1997 RMK Created new handling of interrupt enables/disables - * - cards can now register their own routine to control - * interrupts (recommended). - * 29-Sep-1997 RMK Expansion card interrupt hardware not being re-enabled - * on reset from Linux. (Caused cards not to respond - * under RiscOS without hard reset). - * 15-Feb-1998 RMK Added DMA support - * 12-Sep-1998 RMK Added EASI support - * 10-Jan-1999 RMK Run loaders in a simulated RISC OS environment. - * 17-Apr-1999 RMK Support for EASI Type C cycles. - */ -#define ECARD_C - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/sched.h> -#include <linux/interrupt.h> -#include <linux/completion.h> -#include <linux/reboot.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/device.h> -#include <linux/init.h> -#include <linux/mutex.h> -#include <linux/kthread.h> -#include <linux/io.h> - -#include <asm/dma.h> -#include <asm/ecard.h> -#include <mach/hardware.h> -#include <asm/irq.h> -#include <asm/mmu_context.h> -#include <asm/mach/irq.h> -#include <asm/tlbflush.h> - -#include "ecard.h" - -#ifndef CONFIG_ARCH_RPC -#define HAVE_EXPMASK -#endif - -struct ecard_request { - void (*fn)(struct ecard_request *); - ecard_t *ec; - unsigned int address; - unsigned int length; - unsigned int use_loader; - void *buffer; - struct completion *complete; -}; - -struct expcard_blacklist { - unsigned short manufacturer; - unsigned short product; - const char *type; -}; - -static ecard_t *cards; -static ecard_t *slot_to_expcard[MAX_ECARDS]; -static unsigned int ectcr; -#ifdef HAS_EXPMASK -static unsigned int have_expmask; -#endif - -/* List of descriptions of cards which don't have an extended - * identification, or chunk directories containing a description. - */ -static struct expcard_blacklist __initdata blacklist[] = { - { MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" } -}; - -asmlinkage extern int -ecard_loader_reset(unsigned long base, loader_t loader); -asmlinkage extern int -ecard_loader_read(int off, unsigned long base, loader_t loader); - -static inline unsigned short ecard_getu16(unsigned char *v) -{ - return v[0] | v[1] << 8; -} - -static inline signed long ecard_gets24(unsigned char *v) -{ - return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0); -} - -static inline ecard_t *slot_to_ecard(unsigned int slot) -{ - return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL; -} - -/* ===================== Expansion card daemon ======================== */ -/* - * Since the loader programs on the expansion cards need to be run - * in a specific environment, create a separate task with this - * environment up, and pass requests to this task as and when we - * need to. - * - * This should allow 99% of loaders to be called from Linux. - * - * From a security standpoint, we trust the card vendors. This - * may be a misplaced trust. - */ -static void ecard_task_reset(struct ecard_request *req) -{ - struct expansion_card *ec = req->ec; - struct resource *res; - - res = ec->slot_no == 8 - ? &ec->resource[ECARD_RES_MEMC] - : ec->easi - ? &ec->resource[ECARD_RES_EASI] - : &ec->resource[ECARD_RES_IOCSYNC]; - - ecard_loader_reset(res->start, ec->loader); -} - -static void ecard_task_readbytes(struct ecard_request *req) -{ - struct expansion_card *ec = req->ec; - unsigned char *buf = req->buffer; - unsigned int len = req->length; - unsigned int off = req->address; - - if (ec->slot_no == 8) { - void __iomem *base = (void __iomem *) - ec->resource[ECARD_RES_MEMC].start; - - /* - * The card maintains an index which increments the address - * into a 4096-byte page on each access. We need to keep - * track of the counter. - */ - static unsigned int index; - unsigned int page; - - page = (off >> 12) * 4; - if (page > 256 * 4) - return; - - off &= 4095; - - /* - * If we are reading offset 0, or our current index is - * greater than the offset, reset the hardware index counter. - */ - if (off == 0 || index > off) { - writeb(0, base); - index = 0; - } - - /* - * Increment the hardware index counter until we get to the - * required offset. The read bytes are discarded. - */ - while (index < off) { - readb(base + page); - index += 1; - } - - while (len--) { - *buf++ = readb(base + page); - index += 1; - } - } else { - unsigned long base = (ec->easi - ? &ec->resource[ECARD_RES_EASI] - : &ec->resource[ECARD_RES_IOCSYNC])->start; - void __iomem *pbase = (void __iomem *)base; - - if (!req->use_loader || !ec->loader) { - off *= 4; - while (len--) { - *buf++ = readb(pbase + off); - off += 4; - } - } else { - while(len--) { - /* - * The following is required by some - * expansion card loader programs. - */ - *(unsigned long *)0x108 = 0; - *buf++ = ecard_loader_read(off++, base, - ec->loader); - } - } - } - -} - -static DECLARE_WAIT_QUEUE_HEAD(ecard_wait); -static struct ecard_request *ecard_req; -static DEFINE_MUTEX(ecard_mutex); - -/* - * Set up the expansion card daemon's page tables. - */ -static void ecard_init_pgtables(struct mm_struct *mm) -{ - struct vm_area_struct vma; - - /* We want to set up the page tables for the following mapping: - * Virtual Physical - * 0x03000000 0x03000000 - * 0x03010000 unmapped - * 0x03210000 0x03210000 - * 0x03400000 unmapped - * 0x08000000 0x08000000 - * 0x10000000 unmapped - * - * FIXME: we don't follow this 100% yet. - */ - pgd_t *src_pgd, *dst_pgd; - - src_pgd = pgd_offset(mm, (unsigned long)IO_BASE); - dst_pgd = pgd_offset(mm, IO_START); - - memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (IO_SIZE / PGDIR_SIZE)); - - src_pgd = pgd_offset(mm, (unsigned long)EASI_BASE); - dst_pgd = pgd_offset(mm, EASI_START); - - memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (EASI_SIZE / PGDIR_SIZE)); - - vma.vm_mm = mm; - - flush_tlb_range(&vma, IO_START, IO_START + IO_SIZE); - flush_tlb_range(&vma, EASI_START, EASI_START + EASI_SIZE); -} - -static int ecard_init_mm(void) -{ - struct mm_struct * mm = mm_alloc(); - struct mm_struct *active_mm = current->active_mm; - - if (!mm) - return -ENOMEM; - - current->mm = mm; - current->active_mm = mm; - activate_mm(active_mm, mm); - mmdrop(active_mm); - ecard_init_pgtables(mm); - return 0; -} - -static int -ecard_task(void * unused) -{ - /* - * Allocate a mm. We're not a lazy-TLB kernel task since we need - * to set page table entries where the user space would be. Note - * that this also creates the page tables. Failure is not an - * option here. - */ - if (ecard_init_mm()) - panic("kecardd: unable to alloc mm\n"); - - while (1) { - struct ecard_request *req; - - wait_event_interruptible(ecard_wait, ecard_req != NULL); - - req = xchg(&ecard_req, NULL); - if (req != NULL) { - req->fn(req); - complete(req->complete); - } - } -} - -/* - * Wake the expansion card daemon to action our request. - * - * FIXME: The test here is not sufficient to detect if the - * kcardd is running. - */ -static void ecard_call(struct ecard_request *req) -{ - DECLARE_COMPLETION_ONSTACK(completion); - - req->complete = &completion; - - mutex_lock(&ecard_mutex); - ecard_req = req; - wake_up(&ecard_wait); - - /* - * Now wait for kecardd to run. - */ - wait_for_completion(&completion); - mutex_unlock(&ecard_mutex); -} - -/* ======================= Mid-level card control ===================== */ - -static void -ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld) -{ - struct ecard_request req; - - req.fn = ecard_task_readbytes; - req.ec = ec; - req.address = off; - req.length = len; - req.use_loader = useld; - req.buffer = addr; - - ecard_call(&req); -} - -int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num) -{ - struct ex_chunk_dir excd; - int index = 16; - int useld = 0; - - if (!ec->cid.cd) - return 0; - - while(1) { - ecard_readbytes(&excd, ec, index, 8, useld); - index += 8; - if (c_id(&excd) == 0) { - if (!useld && ec->loader) { - useld = 1; - index = 0; - continue; - } - return 0; - } - if (c_id(&excd) == 0xf0) { /* link */ - index = c_start(&excd); - continue; - } - if (c_id(&excd) == 0x80) { /* loader */ - if (!ec->loader) { - ec->loader = kmalloc(c_len(&excd), - GFP_KERNEL); - if (ec->loader) - ecard_readbytes(ec->loader, ec, - (int)c_start(&excd), - c_len(&excd), useld); - else - return 0; - } - continue; - } - if (c_id(&excd) == id && num-- == 0) - break; - } - - if (c_id(&excd) & 0x80) { - switch (c_id(&excd) & 0x70) { - case 0x70: - ecard_readbytes((unsigned char *)excd.d.string, ec, - (int)c_start(&excd), c_len(&excd), - useld); - break; - case 0x00: - break; - } - } - cd->start_offset = c_start(&excd); - memcpy(cd->d.string, excd.d.string, 256); - return 1; -} - -/* ======================= Interrupt control ============================ */ - -static void ecard_def_irq_enable(ecard_t *ec, int irqnr) -{ -#ifdef HAS_EXPMASK - if (irqnr < 4 && have_expmask) { - have_expmask |= 1 << irqnr; - __raw_writeb(have_expmask, EXPMASK_ENABLE); - } -#endif -} - -static void ecard_def_irq_disable(ecard_t *ec, int irqnr) -{ -#ifdef HAS_EXPMASK - if (irqnr < 4 && have_expmask) { - have_expmask &= ~(1 << irqnr); - __raw_writeb(have_expmask, EXPMASK_ENABLE); - } -#endif -} - -static int ecard_def_irq_pending(ecard_t *ec) -{ - return !ec->irqmask || readb(ec->irqaddr) & ec->irqmask; -} - -static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr) -{ - panic("ecard_def_fiq_enable called - impossible"); -} - -static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr) -{ - panic("ecard_def_fiq_disable called - impossible"); -} - -static int ecard_def_fiq_pending(ecard_t *ec) -{ - return !ec->fiqmask || readb(ec->fiqaddr) & ec->fiqmask; -} - -static expansioncard_ops_t ecard_default_ops = { - ecard_def_irq_enable, - ecard_def_irq_disable, - ecard_def_irq_pending, - ecard_def_fiq_enable, - ecard_def_fiq_disable, - ecard_def_fiq_pending -}; - -/* - * Enable and disable interrupts from expansion cards. - * (interrupts are disabled for these functions). - * - * They are not meant to be called directly, but via enable/disable_irq. - */ -static void ecard_irq_unmask(struct irq_data *d) -{ - ecard_t *ec = slot_to_ecard(d->irq - 32); - - if (ec) { - if (!ec->ops) - ec->ops = &ecard_default_ops; - - if (ec->claimed && ec->ops->irqenable) - ec->ops->irqenable(ec, d->irq); - else - printk(KERN_ERR "ecard: rejecting request to " - "enable IRQs for %d\n", d->irq); - } -} - -static void ecard_irq_mask(struct irq_data *d) -{ - ecard_t *ec = slot_to_ecard(d->irq - 32); - - if (ec) { - if (!ec->ops) - ec->ops = &ecard_default_ops; - - if (ec->ops && ec->ops->irqdisable) - ec->ops->irqdisable(ec, d->irq); - } -} - -static struct irq_chip ecard_chip = { - .name = "ECARD", - .irq_ack = ecard_irq_mask, - .irq_mask = ecard_irq_mask, - .irq_unmask = ecard_irq_unmask, -}; - -void ecard_enablefiq(unsigned int fiqnr) -{ - ecard_t *ec = slot_to_ecard(fiqnr); - - if (ec) { - if (!ec->ops) - ec->ops = &ecard_default_ops; - - if (ec->claimed && ec->ops->fiqenable) - ec->ops->fiqenable(ec, fiqnr); - else - printk(KERN_ERR "ecard: rejecting request to " - "enable FIQs for %d\n", fiqnr); - } -} - -void ecard_disablefiq(unsigned int fiqnr) -{ - ecard_t *ec = slot_to_ecard(fiqnr); - - if (ec) { - if (!ec->ops) - ec->ops = &ecard_default_ops; - - if (ec->ops->fiqdisable) - ec->ops->fiqdisable(ec, fiqnr); - } -} - -static void ecard_dump_irq_state(void) -{ - ecard_t *ec; - - printk("Expansion card IRQ state:\n"); - - for (ec = cards; ec; ec = ec->next) { - if (ec->slot_no == 8) - continue; - - printk(" %d: %sclaimed, ", - ec->slot_no, ec->claimed ? "" : "not "); - - if (ec->ops && ec->ops->irqpending && - ec->ops != &ecard_default_ops) - printk("irq %spending\n", - ec->ops->irqpending(ec) ? "" : "not "); - else - printk("irqaddr %p, mask = %02X, status = %02X\n", - ec->irqaddr, ec->irqmask, readb(ec->irqaddr)); - } -} - -static void ecard_check_lockup(struct irq_desc *desc) -{ - static unsigned long last; - static int lockup; - - /* - * If the timer interrupt has not run since the last million - * unrecognised expansion card interrupts, then there is - * something seriously wrong. Disable the expansion card - * interrupts so at least we can continue. - * - * Maybe we ought to start a timer to re-enable them some time - * later? - */ - if (last == jiffies) { - lockup += 1; - if (lockup > 1000000) { - printk(KERN_ERR "\nInterrupt lockup detected - " - "disabling all expansion card interrupts\n"); - - desc->irq_data.chip->irq_mask(&desc->irq_data); - ecard_dump_irq_state(); - } - } else - lockup = 0; - - /* - * If we did not recognise the source of this interrupt, - * warn the user, but don't flood the user with these messages. - */ - if (!last || time_after(jiffies, last + 5*HZ)) { - last = jiffies; - printk(KERN_WARNING "Unrecognised interrupt from backplane\n"); - ecard_dump_irq_state(); - } -} - -static void -ecard_irq_handler(unsigned int irq, struct irq_desc *desc) -{ - ecard_t *ec; - int called = 0; - - desc->irq_data.chip->irq_mask(&desc->irq_data); - for (ec = cards; ec; ec = ec->next) { - int pending; - - if (!ec->claimed || ec->irq == NO_IRQ || ec->slot_no == 8) - continue; - - if (ec->ops && ec->ops->irqpending) - pending = ec->ops->irqpending(ec); - else - pending = ecard_default_ops.irqpending(ec); - - if (pending) { - generic_handle_irq(ec->irq); - called ++; - } - } - desc->irq_data.chip->irq_unmask(&desc->irq_data); - - if (called == 0) - ecard_check_lockup(desc); -} - -#ifdef HAS_EXPMASK -static unsigned char priority_masks[] = -{ - 0xf0, 0xf1, 0xf3, 0xf7, 0xff, 0xff, 0xff, 0xff -}; - -static unsigned char first_set[] = -{ - 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00, - 0x03, 0x00, 0x01, 0x00, 0x02, 0x00, 0x01, 0x00 -}; - -static void -ecard_irqexp_handler(unsigned int irq, struct irq_desc *desc) -{ - const unsigned int statusmask = 15; - unsigned int status; - - status = __raw_readb(EXPMASK_STATUS) & statusmask; - if (status) { - unsigned int slot = first_set[status]; - ecard_t *ec = slot_to_ecard(slot); - - if (ec->claimed) { - /* - * this ugly code is so that we can operate a - * prioritorising system: - * - * Card 0 highest priority - * Card 1 - * Card 2 - * Card 3 lowest priority - * - * Serial cards should go in 0/1, ethernet/scsi in 2/3 - * otherwise you will lose serial data at high speeds! - */ - generic_handle_irq(ec->irq); - } else { - printk(KERN_WARNING "card%d: interrupt from unclaimed " - "card???\n", slot); - have_expmask &= ~(1 << slot); - __raw_writeb(have_expmask, EXPMASK_ENABLE); - } - } else - printk(KERN_WARNING "Wild interrupt from backplane (masks)\n"); -} - -static int __init ecard_probeirqhw(void) -{ - ecard_t *ec; - int found; - - __raw_writeb(0x00, EXPMASK_ENABLE); - __raw_writeb(0xff, EXPMASK_STATUS); - found = (__raw_readb(EXPMASK_STATUS) & 15) == 0; - __raw_writeb(0xff, EXPMASK_ENABLE); - - if (found) { - printk(KERN_DEBUG "Expansion card interrupt " - "management hardware found\n"); - - /* for each card present, set a bit to '1' */ - have_expmask = 0x80000000; - - for (ec = cards; ec; ec = ec->next) - have_expmask |= 1 << ec->slot_no; - - __raw_writeb(have_expmask, EXPMASK_ENABLE); - } - - return found; -} -#else -#define ecard_irqexp_handler NULL -#define ecard_probeirqhw() (0) -#endif - -static void __iomem *__ecard_address(ecard_t *ec, card_type_t type, card_speed_t speed) -{ - void __iomem *address = NULL; - int slot = ec->slot_no; - - if (ec->slot_no == 8) - return ECARD_MEMC8_BASE; - - ectcr &= ~(1 << slot); - - switch (type) { - case ECARD_MEMC: - if (slot < 4) - address = ECARD_MEMC_BASE + (slot << 14); - break; - - case ECARD_IOC: - if (slot < 4) - address = ECARD_IOC_BASE + (slot << 14); - else - address = ECARD_IOC4_BASE + ((slot - 4) << 14); - if (address) - address += speed << 19; - break; - - case ECARD_EASI: - address = ECARD_EASI_BASE + (slot << 24); - if (speed == ECARD_FAST) - ectcr |= 1 << slot; - break; - - default: - break; - } - -#ifdef IOMD_ECTCR - iomd_writeb(ectcr, IOMD_ECTCR); -#endif - return address; -} - -static int ecard_prints(struct seq_file *m, ecard_t *ec) -{ - seq_printf(m, " %d: %s ", ec->slot_no, ec->easi ? "EASI" : " "); - - if (ec->cid.id == 0) { - struct in_chunk_dir incd; - - seq_printf(m, "[%04X:%04X] ", - ec->cid.manufacturer, ec->cid.product); - - if (!ec->card_desc && ec->cid.cd && - ecard_readchunk(&incd, ec, 0xf5, 0)) { - ec->card_desc = kmalloc(strlen(incd.d.string)+1, GFP_KERNEL); - - if (ec->card_desc) - strcpy((char *)ec->card_desc, incd.d.string); - } - - seq_printf(m, "%s\n", ec->card_desc ? ec->card_desc : "*unknown*"); - } else - seq_printf(m, "Simple card %d\n", ec->cid.id); - - return 0; -} - -static int ecard_devices_proc_show(struct seq_file *m, void *v) -{ - ecard_t *ec = cards; - - while (ec) { - ecard_prints(m, ec); - ec = ec->next; - } - return 0; -} - -static int ecard_devices_proc_open(struct inode *inode, struct file *file) -{ - return single_open(file, ecard_devices_proc_show, NULL); -} - -static const struct file_operations bus_ecard_proc_fops = { - .owner = THIS_MODULE, - .open = ecard_devices_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static struct proc_dir_entry *proc_bus_ecard_dir = NULL; - -static void ecard_proc_init(void) -{ - proc_bus_ecard_dir = proc_mkdir("bus/ecard", NULL); - proc_create("devices", 0, proc_bus_ecard_dir, &bus_ecard_proc_fops); -} - -#define ec_set_resource(ec,nr,st,sz) \ - do { \ - (ec)->resource[nr].name = dev_name(&ec->dev); \ - (ec)->resource[nr].start = st; \ - (ec)->resource[nr].end = (st) + (sz) - 1; \ - (ec)->resource[nr].flags = IORESOURCE_MEM; \ - } while (0) - -static void __init ecard_free_card(struct expansion_card *ec) -{ - int i; - - for (i = 0; i < ECARD_NUM_RESOURCES; i++) - if (ec->resource[i].flags) - release_resource(&ec->resource[i]); - - kfree(ec); -} - -static struct expansion_card *__init ecard_alloc_card(int type, int slot) -{ - struct expansion_card *ec; - unsigned long base; - int i; - - ec = kzalloc(sizeof(ecard_t), GFP_KERNEL); - if (!ec) { - ec = ERR_PTR(-ENOMEM); - goto nomem; - } - - ec->slot_no = slot; - ec->easi = type == ECARD_EASI; - ec->irq = NO_IRQ; - ec->fiq = NO_IRQ; - ec->dma = NO_DMA; - ec->ops = &ecard_default_ops; - - dev_set_name(&ec->dev, "ecard%d", slot); - ec->dev.parent = NULL; - ec->dev.bus = &ecard_bus_type; - ec->dev.dma_mask = &ec->dma_mask; - ec->dma_mask = (u64)0xffffffff; - ec->dev.coherent_dma_mask = ec->dma_mask; - - if (slot < 4) { - ec_set_resource(ec, ECARD_RES_MEMC, - PODSLOT_MEMC_BASE + (slot << 14), - PODSLOT_MEMC_SIZE); - base = PODSLOT_IOC0_BASE + (slot << 14); - } else - base = PODSLOT_IOC4_BASE + ((slot - 4) << 14); - -#ifdef CONFIG_ARCH_RPC - if (slot < 8) { - ec_set_resource(ec, ECARD_RES_EASI, - PODSLOT_EASI_BASE + (slot << 24), - PODSLOT_EASI_SIZE); - } - - if (slot == 8) { - ec_set_resource(ec, ECARD_RES_MEMC, NETSLOT_BASE, NETSLOT_SIZE); - } else -#endif - - for (i = 0; i <= ECARD_RES_IOCSYNC - ECARD_RES_IOCSLOW; i++) - ec_set_resource(ec, i + ECARD_RES_IOCSLOW, - base + (i << 19), PODSLOT_IOC_SIZE); - - for (i = 0; i < ECARD_NUM_RESOURCES; i++) { - if (ec->resource[i].flags && - request_resource(&iomem_resource, &ec->resource[i])) { - dev_err(&ec->dev, "resource(s) not available\n"); - ec->resource[i].end -= ec->resource[i].start; - ec->resource[i].start = 0; - ec->resource[i].flags = 0; - } - } - - nomem: - return ec; -} - -static ssize_t ecard_show_irq(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct expansion_card *ec = ECARD_DEV(dev); - return sprintf(buf, "%u\n", ec->irq); -} - -static ssize_t ecard_show_dma(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct expansion_card *ec = ECARD_DEV(dev); - return sprintf(buf, "%u\n", ec->dma); -} - -static ssize_t ecard_show_resources(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct expansion_card *ec = ECARD_DEV(dev); - char *str = buf; - int i; - - for (i = 0; i < ECARD_NUM_RESOURCES; i++) - str += sprintf(str, "%08x %08x %08lx\n", - ec->resource[i].start, - ec->resource[i].end, - ec->resource[i].flags); - - return str - buf; -} - -static ssize_t ecard_show_vendor(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct expansion_card *ec = ECARD_DEV(dev); - return sprintf(buf, "%u\n", ec->cid.manufacturer); -} - -static ssize_t ecard_show_device(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct expansion_card *ec = ECARD_DEV(dev); - return sprintf(buf, "%u\n", ec->cid.product); -} - -static ssize_t ecard_show_type(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct expansion_card *ec = ECARD_DEV(dev); - return sprintf(buf, "%s\n", ec->easi ? "EASI" : "IOC"); -} - -static struct device_attribute ecard_dev_attrs[] = { - __ATTR(device, S_IRUGO, ecard_show_device, NULL), - __ATTR(dma, S_IRUGO, ecard_show_dma, NULL), - __ATTR(irq, S_IRUGO, ecard_show_irq, NULL), - __ATTR(resource, S_IRUGO, ecard_show_resources, NULL), - __ATTR(type, S_IRUGO, ecard_show_type, NULL), - __ATTR(vendor, S_IRUGO, ecard_show_vendor, NULL), - __ATTR_NULL, -}; - - -int ecard_request_resources(struct expansion_card *ec) -{ - int i, err = 0; - - for (i = 0; i < ECARD_NUM_RESOURCES; i++) { - if (ecard_resource_end(ec, i) && - !request_mem_region(ecard_resource_start(ec, i), - ecard_resource_len(ec, i), - ec->dev.driver->name)) { - err = -EBUSY; - break; - } - } - - if (err) { - while (i--) - if (ecard_resource_end(ec, i)) - release_mem_region(ecard_resource_start(ec, i), - ecard_resource_len(ec, i)); - } - return err; -} -EXPORT_SYMBOL(ecard_request_resources); - -void ecard_release_resources(struct expansion_card *ec) -{ - int i; - - for (i = 0; i < ECARD_NUM_RESOURCES; i++) - if (ecard_resource_end(ec, i)) - release_mem_region(ecard_resource_start(ec, i), - ecard_resource_len(ec, i)); -} -EXPORT_SYMBOL(ecard_release_resources); - -void ecard_setirq(struct expansion_card *ec, const struct expansion_card_ops *ops, void *irq_data) -{ - ec->irq_data = irq_data; - barrier(); - ec->ops = ops; -} -EXPORT_SYMBOL(ecard_setirq); - -void __iomem *ecardm_iomap(struct expansion_card *ec, unsigned int res, - unsigned long offset, unsigned long maxsize) -{ - unsigned long start = ecard_resource_start(ec, res); - unsigned long end = ecard_resource_end(ec, res); - - if (offset > (end - start)) - return NULL; - - start += offset; - if (maxsize && end - start > maxsize) - end = start + maxsize; - - return devm_ioremap(&ec->dev, start, end - start); -} -EXPORT_SYMBOL(ecardm_iomap); - -/* - * Probe for an expansion card. - * - * If bit 1 of the first byte of the card is set, then the - * card does not exist. - */ -static int __init -ecard_probe(int slot, card_type_t type) -{ - ecard_t **ecp; - ecard_t *ec; - struct ex_ecid cid; - void __iomem *addr; - int i, rc; - - ec = ecard_alloc_card(type, slot); - if (IS_ERR(ec)) { - rc = PTR_ERR(ec); - goto nomem; - } - - rc = -ENODEV; - if ((addr = __ecard_address(ec, type, ECARD_SYNC)) == NULL) - goto nodev; - - cid.r_zero = 1; - ecard_readbytes(&cid, ec, 0, 16, 0); - if (cid.r_zero) - goto nodev; - - ec->cid.id = cid.r_id; - ec->cid.cd = cid.r_cd; - ec->cid.is = cid.r_is; - ec->cid.w = cid.r_w; - ec->cid.manufacturer = ecard_getu16(cid.r_manu); - ec->cid.product = ecard_getu16(cid.r_prod); - ec->cid.country = cid.r_country; - ec->cid.irqmask = cid.r_irqmask; - ec->cid.irqoff = ecard_gets24(cid.r_irqoff); - ec->cid.fiqmask = cid.r_fiqmask; - ec->cid.fiqoff = ecard_gets24(cid.r_fiqoff); - ec->fiqaddr = - ec->irqaddr = addr; - - if (ec->cid.is) { - ec->irqmask = ec->cid.irqmask; - ec->irqaddr += ec->cid.irqoff; - ec->fiqmask = ec->cid.fiqmask; - ec->fiqaddr += ec->cid.fiqoff; - } else { - ec->irqmask = 1; - ec->fiqmask = 4; - } - - for (i = 0; i < ARRAY_SIZE(blacklist); i++) - if (blacklist[i].manufacturer == ec->cid.manufacturer && - blacklist[i].product == ec->cid.product) { - ec->card_desc = blacklist[i].type; - break; - } - - /* - * hook the interrupt handlers - */ - if (slot < 8) { - ec->irq = 32 + slot; - irq_set_chip_and_handler(ec->irq, &ecard_chip, - handle_level_irq); - set_irq_flags(ec->irq, IRQF_VALID); - } - - if (slot == 8) - ec->irq = 11; -#ifdef CONFIG_ARCH_RPC - /* On RiscPC, only first two slots have DMA capability */ - if (slot < 2) - ec->dma = 2 + slot; -#endif - - for (ecp = &cards; *ecp; ecp = &(*ecp)->next); - - *ecp = ec; - slot_to_expcard[slot] = ec; - - device_register(&ec->dev); - - return 0; - - nodev: - ecard_free_card(ec); - nomem: - return rc; -} - -/* - * Initialise the expansion card system. - * Locate all hardware - interrupt management and - * actual cards. - */ -static int __init ecard_init(void) -{ - struct task_struct *task; - int slot, irqhw; - - task = kthread_run(ecard_task, NULL, "kecardd"); - if (IS_ERR(task)) { - printk(KERN_ERR "Ecard: unable to create kernel thread: %ld\n", - PTR_ERR(task)); - return PTR_ERR(task); - } - - printk("Probing expansion cards\n"); - - for (slot = 0; slot < 8; slot ++) { - if (ecard_probe(slot, ECARD_EASI) == -ENODEV) - ecard_probe(slot, ECARD_IOC); - } - - ecard_probe(8, ECARD_IOC); - - irqhw = ecard_probeirqhw(); - - irq_set_chained_handler(IRQ_EXPANSIONCARD, - irqhw ? ecard_irqexp_handler : ecard_irq_handler); - - ecard_proc_init(); - - return 0; -} - -subsys_initcall(ecard_init); - -/* - * ECARD "bus" - */ -static const struct ecard_id * -ecard_match_device(const struct ecard_id *ids, struct expansion_card *ec) -{ - int i; - - for (i = 0; ids[i].manufacturer != 65535; i++) - if (ec->cid.manufacturer == ids[i].manufacturer && - ec->cid.product == ids[i].product) - return ids + i; - - return NULL; -} - -static int ecard_drv_probe(struct device *dev) -{ - struct expansion_card *ec = ECARD_DEV(dev); - struct ecard_driver *drv = ECARD_DRV(dev->driver); - const struct ecard_id *id; - int ret; - - id = ecard_match_device(drv->id_table, ec); - - ec->claimed = 1; - ret = drv->probe(ec, id); - if (ret) - ec->claimed = 0; - return ret; -} - -static int ecard_drv_remove(struct device *dev) -{ - struct expansion_card *ec = ECARD_DEV(dev); - struct ecard_driver *drv = ECARD_DRV(dev->driver); - - drv->remove(ec); - ec->claimed = 0; - - /* - * Restore the default operations. We ensure that the - * ops are set before we change the data. - */ - ec->ops = &ecard_default_ops; - barrier(); - ec->irq_data = NULL; - - return 0; -} - -/* - * Before rebooting, we must make sure that the expansion card is in a - * sensible state, so it can be re-detected. This means that the first - * page of the ROM must be visible. We call the expansion cards reset - * handler, if any. - */ -static void ecard_drv_shutdown(struct device *dev) -{ - struct expansion_card *ec = ECARD_DEV(dev); - struct ecard_driver *drv = ECARD_DRV(dev->driver); - struct ecard_request req; - - if (dev->driver) { - if (drv->shutdown) - drv->shutdown(ec); - ec->claimed = 0; - } - - /* - * If this card has a loader, call the reset handler. - */ - if (ec->loader) { - req.fn = ecard_task_reset; - req.ec = ec; - ecard_call(&req); - } -} - -int ecard_register_driver(struct ecard_driver *drv) -{ - drv->drv.bus = &ecard_bus_type; - - return driver_register(&drv->drv); -} - -void ecard_remove_driver(struct ecard_driver *drv) -{ - driver_unregister(&drv->drv); -} - -static int ecard_match(struct device *_dev, struct device_driver *_drv) -{ - struct expansion_card *ec = ECARD_DEV(_dev); - struct ecard_driver *drv = ECARD_DRV(_drv); - int ret; - - if (drv->id_table) { - ret = ecard_match_device(drv->id_table, ec) != NULL; - } else { - ret = ec->cid.id == drv->id; - } - - return ret; -} - -struct bus_type ecard_bus_type = { - .name = "ecard", - .dev_attrs = ecard_dev_attrs, - .match = ecard_match, - .probe = ecard_drv_probe, - .remove = ecard_drv_remove, - .shutdown = ecard_drv_shutdown, -}; - -static int ecard_bus_init(void) -{ - return bus_register(&ecard_bus_type); -} - -postcore_initcall(ecard_bus_init); - -EXPORT_SYMBOL(ecard_readchunk); -EXPORT_SYMBOL(ecard_register_driver); -EXPORT_SYMBOL(ecard_remove_driver); -EXPORT_SYMBOL(ecard_bus_type); |