1147 lines
26 KiB
C
1147 lines
26 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* linux/arch/arm/kernel/ecard.c
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*
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* Copyright 1995-2001 Russell King
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*
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* Find all installed expansion cards, and handle interrupts from them.
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*
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* Created from information from Acorns RiscOS3 PRMs
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*
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* 08-Dec-1996 RMK Added code for the 9'th expansion card - the ether
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* podule slot.
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* 06-May-1997 RMK Added blacklist for cards whose loader doesn't work.
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* 12-Sep-1997 RMK Created new handling of interrupt enables/disables
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* - cards can now register their own routine to control
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* interrupts (recommended).
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* 29-Sep-1997 RMK Expansion card interrupt hardware not being re-enabled
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* on reset from Linux. (Caused cards not to respond
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* under RiscOS without hard reset).
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* 15-Feb-1998 RMK Added DMA support
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* 12-Sep-1998 RMK Added EASI support
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* 10-Jan-1999 RMK Run loaders in a simulated RISC OS environment.
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* 17-Apr-1999 RMK Support for EASI Type C cycles.
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*/
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#define ECARD_C
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/sched/mm.h>
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#include <linux/interrupt.h>
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#include <linux/completion.h>
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#include <linux/reboot.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/mutex.h>
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#include <linux/kthread.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <asm/dma.h>
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#include <asm/ecard.h>
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#include <mach/hardware.h>
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#include <asm/irq.h>
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#include <asm/mmu_context.h>
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#include <asm/mach/irq.h>
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#include <asm/tlbflush.h>
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#include "ecard.h"
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struct ecard_request {
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void (*fn)(struct ecard_request *);
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ecard_t *ec;
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unsigned int address;
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unsigned int length;
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unsigned int use_loader;
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void *buffer;
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struct completion *complete;
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};
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struct expcard_quirklist {
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unsigned short manufacturer;
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unsigned short product;
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const char *type;
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void (*init)(ecard_t *ec);
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};
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static ecard_t *cards;
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static ecard_t *slot_to_expcard[MAX_ECARDS];
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static unsigned int ectcr;
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static void atomwide_3p_quirk(ecard_t *ec);
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/* List of descriptions of cards which don't have an extended
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* identification, or chunk directories containing a description.
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*/
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static struct expcard_quirklist quirklist[] __initdata = {
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{ MANU_ACORN, PROD_ACORN_ETHER1, "Acorn Ether1" },
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{ MANU_ATOMWIDE, PROD_ATOMWIDE_3PSERIAL, NULL, atomwide_3p_quirk },
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};
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asmlinkage extern int
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ecard_loader_reset(unsigned long base, loader_t loader);
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asmlinkage extern int
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ecard_loader_read(int off, unsigned long base, loader_t loader);
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static inline unsigned short ecard_getu16(unsigned char *v)
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{
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return v[0] | v[1] << 8;
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}
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static inline signed long ecard_gets24(unsigned char *v)
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{
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return v[0] | v[1] << 8 | v[2] << 16 | ((v[2] & 0x80) ? 0xff000000 : 0);
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}
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static inline ecard_t *slot_to_ecard(unsigned int slot)
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{
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return slot < MAX_ECARDS ? slot_to_expcard[slot] : NULL;
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}
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/* ===================== Expansion card daemon ======================== */
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/*
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* Since the loader programs on the expansion cards need to be run
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* in a specific environment, create a separate task with this
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* environment up, and pass requests to this task as and when we
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* need to.
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*
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* This should allow 99% of loaders to be called from Linux.
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*
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* From a security standpoint, we trust the card vendors. This
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* may be a misplaced trust.
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*/
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static void ecard_task_reset(struct ecard_request *req)
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{
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struct expansion_card *ec = req->ec;
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struct resource *res;
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res = ec->slot_no == 8
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? &ec->resource[ECARD_RES_MEMC]
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: ec->easi
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? &ec->resource[ECARD_RES_EASI]
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: &ec->resource[ECARD_RES_IOCSYNC];
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ecard_loader_reset(res->start, ec->loader);
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}
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static void ecard_task_readbytes(struct ecard_request *req)
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{
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struct expansion_card *ec = req->ec;
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unsigned char *buf = req->buffer;
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unsigned int len = req->length;
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unsigned int off = req->address;
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if (ec->slot_no == 8) {
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void __iomem *base = (void __iomem *)
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ec->resource[ECARD_RES_MEMC].start;
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/*
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* The card maintains an index which increments the address
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* into a 4096-byte page on each access. We need to keep
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* track of the counter.
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*/
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static unsigned int index;
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unsigned int page;
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page = (off >> 12) * 4;
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if (page > 256 * 4)
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return;
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off &= 4095;
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/*
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* If we are reading offset 0, or our current index is
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* greater than the offset, reset the hardware index counter.
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*/
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if (off == 0 || index > off) {
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writeb(0, base);
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index = 0;
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}
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/*
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* Increment the hardware index counter until we get to the
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* required offset. The read bytes are discarded.
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*/
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while (index < off) {
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readb(base + page);
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index += 1;
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}
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while (len--) {
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*buf++ = readb(base + page);
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index += 1;
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}
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} else {
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unsigned long base = (ec->easi
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? &ec->resource[ECARD_RES_EASI]
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: &ec->resource[ECARD_RES_IOCSYNC])->start;
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void __iomem *pbase = (void __iomem *)base;
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if (!req->use_loader || !ec->loader) {
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off *= 4;
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while (len--) {
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*buf++ = readb(pbase + off);
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off += 4;
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}
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} else {
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while(len--) {
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/*
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* The following is required by some
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* expansion card loader programs.
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*/
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*(unsigned long *)0x108 = 0;
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*buf++ = ecard_loader_read(off++, base,
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ec->loader);
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}
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}
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}
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}
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static DECLARE_WAIT_QUEUE_HEAD(ecard_wait);
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static struct ecard_request *ecard_req;
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static DEFINE_MUTEX(ecard_mutex);
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/*
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* Set up the expansion card daemon's page tables.
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*/
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static void ecard_init_pgtables(struct mm_struct *mm)
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{
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struct vm_area_struct vma = TLB_FLUSH_VMA(mm, VM_EXEC);
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/* We want to set up the page tables for the following mapping:
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* Virtual Physical
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* 0x03000000 0x03000000
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* 0x03010000 unmapped
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* 0x03210000 0x03210000
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* 0x03400000 unmapped
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* 0x08000000 0x08000000
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* 0x10000000 unmapped
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*
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* FIXME: we don't follow this 100% yet.
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*/
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pgd_t *src_pgd, *dst_pgd;
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src_pgd = pgd_offset(mm, (unsigned long)IO_BASE);
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dst_pgd = pgd_offset(mm, IO_START);
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memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (IO_SIZE / PGDIR_SIZE));
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src_pgd = pgd_offset(mm, (unsigned long)EASI_BASE);
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dst_pgd = pgd_offset(mm, EASI_START);
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memcpy(dst_pgd, src_pgd, sizeof(pgd_t) * (EASI_SIZE / PGDIR_SIZE));
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flush_tlb_range(&vma, IO_START, IO_START + IO_SIZE);
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flush_tlb_range(&vma, EASI_START, EASI_START + EASI_SIZE);
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}
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static int ecard_init_mm(void)
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{
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struct mm_struct * mm = mm_alloc();
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struct mm_struct *active_mm = current->active_mm;
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if (!mm)
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return -ENOMEM;
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current->mm = mm;
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current->active_mm = mm;
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activate_mm(active_mm, mm);
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mmdrop(active_mm);
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ecard_init_pgtables(mm);
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return 0;
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}
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static int
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ecard_task(void * unused)
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{
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/*
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* Allocate a mm. We're not a lazy-TLB kernel task since we need
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* to set page table entries where the user space would be. Note
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* that this also creates the page tables. Failure is not an
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* option here.
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*/
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if (ecard_init_mm())
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panic("kecardd: unable to alloc mm\n");
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while (1) {
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struct ecard_request *req;
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wait_event_interruptible(ecard_wait, ecard_req != NULL);
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req = xchg(&ecard_req, NULL);
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if (req != NULL) {
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req->fn(req);
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complete(req->complete);
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}
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}
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}
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/*
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* Wake the expansion card daemon to action our request.
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*
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* FIXME: The test here is not sufficient to detect if the
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* kcardd is running.
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*/
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static void ecard_call(struct ecard_request *req)
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{
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DECLARE_COMPLETION_ONSTACK(completion);
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req->complete = &completion;
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mutex_lock(&ecard_mutex);
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ecard_req = req;
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wake_up(&ecard_wait);
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/*
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* Now wait for kecardd to run.
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*/
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wait_for_completion(&completion);
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mutex_unlock(&ecard_mutex);
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}
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/* ======================= Mid-level card control ===================== */
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static void
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ecard_readbytes(void *addr, ecard_t *ec, int off, int len, int useld)
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{
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struct ecard_request req;
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req.fn = ecard_task_readbytes;
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req.ec = ec;
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req.address = off;
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req.length = len;
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req.use_loader = useld;
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req.buffer = addr;
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ecard_call(&req);
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}
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int ecard_readchunk(struct in_chunk_dir *cd, ecard_t *ec, int id, int num)
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{
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struct ex_chunk_dir excd;
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int index = 16;
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int useld = 0;
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if (!ec->cid.cd)
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return 0;
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while(1) {
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ecard_readbytes(&excd, ec, index, 8, useld);
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index += 8;
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if (c_id(&excd) == 0) {
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if (!useld && ec->loader) {
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useld = 1;
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index = 0;
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continue;
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}
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return 0;
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}
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if (c_id(&excd) == 0xf0) { /* link */
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index = c_start(&excd);
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continue;
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}
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if (c_id(&excd) == 0x80) { /* loader */
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if (!ec->loader) {
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ec->loader = kmalloc(c_len(&excd),
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GFP_KERNEL);
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if (ec->loader)
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ecard_readbytes(ec->loader, ec,
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(int)c_start(&excd),
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c_len(&excd), useld);
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else
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return 0;
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}
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continue;
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}
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if (c_id(&excd) == id && num-- == 0)
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break;
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}
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if (c_id(&excd) & 0x80) {
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switch (c_id(&excd) & 0x70) {
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case 0x70:
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ecard_readbytes((unsigned char *)excd.d.string, ec,
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(int)c_start(&excd), c_len(&excd),
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useld);
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break;
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case 0x00:
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break;
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}
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}
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cd->start_offset = c_start(&excd);
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memcpy(cd->d.string, excd.d.string, 256);
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return 1;
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}
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/* ======================= Interrupt control ============================ */
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static void ecard_def_irq_enable(ecard_t *ec, int irqnr)
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{
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}
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static void ecard_def_irq_disable(ecard_t *ec, int irqnr)
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{
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}
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static int ecard_def_irq_pending(ecard_t *ec)
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{
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return !ec->irqmask || readb(ec->irqaddr) & ec->irqmask;
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}
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static void ecard_def_fiq_enable(ecard_t *ec, int fiqnr)
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{
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panic("ecard_def_fiq_enable called - impossible");
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}
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static void ecard_def_fiq_disable(ecard_t *ec, int fiqnr)
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{
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panic("ecard_def_fiq_disable called - impossible");
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}
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static int ecard_def_fiq_pending(ecard_t *ec)
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{
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return !ec->fiqmask || readb(ec->fiqaddr) & ec->fiqmask;
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}
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static expansioncard_ops_t ecard_default_ops = {
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ecard_def_irq_enable,
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ecard_def_irq_disable,
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ecard_def_irq_pending,
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ecard_def_fiq_enable,
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ecard_def_fiq_disable,
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ecard_def_fiq_pending
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};
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/*
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* Enable and disable interrupts from expansion cards.
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* (interrupts are disabled for these functions).
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*
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* They are not meant to be called directly, but via enable/disable_irq.
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*/
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static void ecard_irq_unmask(struct irq_data *d)
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{
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ecard_t *ec = irq_data_get_irq_chip_data(d);
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if (ec) {
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if (!ec->ops)
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ec->ops = &ecard_default_ops;
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if (ec->claimed && ec->ops->irqenable)
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ec->ops->irqenable(ec, d->irq);
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else
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printk(KERN_ERR "ecard: rejecting request to "
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"enable IRQs for %d\n", d->irq);
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}
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}
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static void ecard_irq_mask(struct irq_data *d)
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{
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ecard_t *ec = irq_data_get_irq_chip_data(d);
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if (ec) {
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if (!ec->ops)
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ec->ops = &ecard_default_ops;
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if (ec->ops && ec->ops->irqdisable)
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ec->ops->irqdisable(ec, d->irq);
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}
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}
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static struct irq_chip ecard_chip = {
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.name = "ECARD",
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.irq_ack = ecard_irq_mask,
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.irq_mask = ecard_irq_mask,
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.irq_unmask = ecard_irq_unmask,
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};
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void ecard_enablefiq(unsigned int fiqnr)
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{
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ecard_t *ec = slot_to_ecard(fiqnr);
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if (ec) {
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if (!ec->ops)
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ec->ops = &ecard_default_ops;
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if (ec->claimed && ec->ops->fiqenable)
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ec->ops->fiqenable(ec, fiqnr);
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else
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printk(KERN_ERR "ecard: rejecting request to "
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"enable FIQs for %d\n", fiqnr);
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}
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}
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void ecard_disablefiq(unsigned int fiqnr)
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{
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ecard_t *ec = slot_to_ecard(fiqnr);
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if (ec) {
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if (!ec->ops)
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ec->ops = &ecard_default_ops;
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if (ec->ops->fiqdisable)
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ec->ops->fiqdisable(ec, fiqnr);
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}
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}
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static void ecard_dump_irq_state(void)
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{
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ecard_t *ec;
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printk("Expansion card IRQ state:\n");
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for (ec = cards; ec; ec = ec->next) {
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const char *claimed;
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if (ec->slot_no == 8)
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continue;
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claimed = ec->claimed ? "" : "not ";
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if (ec->ops && ec->ops->irqpending &&
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ec->ops != &ecard_default_ops)
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printk(" %d: %sclaimed irq %spending\n",
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ec->slot_no, claimed,
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ec->ops->irqpending(ec) ? "" : "not ");
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else
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printk(" %d: %sclaimed irqaddr %p, mask = %02X, status = %02X\n",
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ec->slot_no, claimed,
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ec->irqaddr, ec->irqmask, readb(ec->irqaddr));
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}
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}
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static void ecard_check_lockup(struct irq_desc *desc)
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{
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static unsigned long last;
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static int lockup;
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/*
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* If the timer interrupt has not run since the last million
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* unrecognised expansion card interrupts, then there is
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* something seriously wrong. Disable the expansion card
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* interrupts so at least we can continue.
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*
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* Maybe we ought to start a timer to re-enable them some time
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* later?
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*/
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if (last == jiffies) {
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lockup += 1;
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if (lockup > 1000000) {
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printk(KERN_ERR "\nInterrupt lockup detected - "
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"disabling all expansion card interrupts\n");
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desc->irq_data.chip->irq_mask(&desc->irq_data);
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ecard_dump_irq_state();
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}
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} else
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lockup = 0;
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/*
|
|
* 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(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 || 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);
|
|
}
|
|
|
|
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 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_single("devices", 0, proc_bus_ecard_dir,
|
|
ecard_devices_proc_show);
|
|
}
|
|
|
|
#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 = 0;
|
|
ec->fiq = 0;
|
|
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 irq_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct expansion_card *ec = ECARD_DEV(dev);
|
|
return sprintf(buf, "%u\n", ec->irq);
|
|
}
|
|
static DEVICE_ATTR_RO(irq);
|
|
|
|
static ssize_t dma_show(struct device *dev, struct device_attribute *attr, char *buf)
|
|
{
|
|
struct expansion_card *ec = ECARD_DEV(dev);
|
|
return sprintf(buf, "%u\n", ec->dma);
|
|
}
|
|
static DEVICE_ATTR_RO(dma);
|
|
|
|
static ssize_t resource_show(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 DEVICE_ATTR_RO(resource);
|
|
|
|
static ssize_t vendor_show(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 DEVICE_ATTR_RO(vendor);
|
|
|
|
static ssize_t device_show(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 DEVICE_ATTR_RO(device);
|
|
|
|
static ssize_t type_show(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 DEVICE_ATTR_RO(type);
|
|
|
|
static struct attribute *ecard_dev_attrs[] = {
|
|
&dev_attr_device.attr,
|
|
&dev_attr_dma.attr,
|
|
&dev_attr_irq.attr,
|
|
&dev_attr_resource.attr,
|
|
&dev_attr_type.attr,
|
|
&dev_attr_vendor.attr,
|
|
NULL,
|
|
};
|
|
ATTRIBUTE_GROUPS(ecard_dev);
|
|
|
|
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);
|
|
|
|
static void atomwide_3p_quirk(ecard_t *ec)
|
|
{
|
|
void __iomem *addr = __ecard_address(ec, ECARD_IOC, ECARD_SYNC);
|
|
unsigned int i;
|
|
|
|
/* Disable interrupts on each port */
|
|
for (i = 0x2000; i <= 0x2800; i += 0x0400)
|
|
writeb(0, addr + i + 4);
|
|
}
|
|
|
|
/*
|
|
* 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, unsigned irq, 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(quirklist); i++)
|
|
if (quirklist[i].manufacturer == ec->cid.manufacturer &&
|
|
quirklist[i].product == ec->cid.product) {
|
|
if (quirklist[i].type)
|
|
ec->card_desc = quirklist[i].type;
|
|
if (quirklist[i].init)
|
|
quirklist[i].init(ec);
|
|
break;
|
|
}
|
|
|
|
ec->irq = irq;
|
|
|
|
/*
|
|
* hook the interrupt handlers
|
|
*/
|
|
if (slot < 8) {
|
|
irq_set_chip_and_handler(ec->irq, &ecard_chip,
|
|
handle_level_irq);
|
|
irq_set_chip_data(ec->irq, ec);
|
|
irq_clear_status_flags(ec->irq, IRQ_NOREQUEST);
|
|
}
|
|
|
|
#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;
|
|
|
|
rc = device_register(&ec->dev);
|
|
if (rc)
|
|
goto nodev;
|
|
|
|
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, irqbase;
|
|
|
|
irqbase = irq_alloc_descs(-1, 0, 8, -1);
|
|
if (irqbase < 0)
|
|
return irqbase;
|
|
|
|
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));
|
|
irq_free_descs(irqbase, 8);
|
|
return PTR_ERR(task);
|
|
}
|
|
|
|
printk("Probing expansion cards\n");
|
|
|
|
for (slot = 0; slot < 8; slot ++) {
|
|
if (ecard_probe(slot, irqbase + slot, ECARD_EASI) == -ENODEV)
|
|
ecard_probe(slot, irqbase + slot, ECARD_IOC);
|
|
}
|
|
|
|
ecard_probe(8, 11, ECARD_IOC);
|
|
|
|
irq_set_chained_handler(IRQ_EXPANSIONCARD, 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 void 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;
|
|
}
|
|
|
|
/*
|
|
* 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_groups = ecard_dev_groups,
|
|
.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);
|