From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- drivers/parisc/eisa_enumerator.c | 521 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 521 insertions(+) create mode 100644 drivers/parisc/eisa_enumerator.c (limited to 'drivers/parisc/eisa_enumerator.c') diff --git a/drivers/parisc/eisa_enumerator.c b/drivers/parisc/eisa_enumerator.c new file mode 100644 index 000000000000..6d8aae003f6c --- /dev/null +++ b/drivers/parisc/eisa_enumerator.c @@ -0,0 +1,521 @@ +/* + * eisa_enumerator.c - provide support for EISA adapters in PA-RISC machines + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Copyright (c) 2002 Daniel Engstrom <5116@telia.com> + * + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include + + +/* + * Todo: + * + * PORT init with MASK attr and other size than byte + * MEMORY with other decode than 20 bit + * CRC stuff + * FREEFORM stuff + */ + +#define EPI 0xc80 +#define NUM_SLOT 16 +#define SLOT2PORT(x) (x<<12) + + +/* macros to handle unaligned accesses and + * byte swapping. The data in the EEPROM is + * little-endian on the big-endian PAROSC */ +#define get_8(x) (*(u_int8_t*)(x)) + +static inline u_int16_t get_16(const unsigned char *x) +{ + return (x[1] << 8) | x[0]; +} + +static inline u_int32_t get_32(const unsigned char *x) +{ + return (x[3] << 24) | (x[2] << 16) | (x[1] << 8) | x[0]; +} + +static inline u_int32_t get_24(const unsigned char *x) +{ + return (x[2] << 24) | (x[1] << 16) | (x[0] << 8); +} + +static void print_eisa_id(char *s, u_int32_t id) +{ + char vendor[4]; + int rev; + int device; + + rev = id & 0xff; + id >>= 8; + device = id & 0xff; + id >>= 8; + vendor[3] = '\0'; + vendor[2] = '@' + (id & 0x1f); + id >>= 5; + vendor[1] = '@' + (id & 0x1f); + id >>= 5; + vendor[0] = '@' + (id & 0x1f); + id >>= 5; + + sprintf(s, "%s%02X%02X", vendor, device, rev); +} + +static int configure_memory(const unsigned char *buf, + struct resource *mem_parent, + char *name) +{ + int len; + u_int8_t c; + int i; + struct resource *res; + + len=0; + + for (i=0;iname = name; + res->start = mem_parent->start + get_24(buf+len+2); + res->end = res->start + get_16(buf+len+5)*1024; + res->flags = IORESOURCE_MEM; + printk("memory %lx-%lx ", res->start, res->end); + result = request_resource(mem_parent, res); + if (result < 0) { + printk("\n" KERN_ERR "EISA Enumerator: failed to claim EISA Bus address space!\n"); + return result; + } + } + + len+=7; + + if (!(c & HPEE_MEMORY_MORE)) { + break; + } + } + + return len; +} + + +static int configure_irq(const unsigned char *buf) +{ + int len; + u_int8_t c; + int i; + + len=0; + + for (i=0;iname = board; + res->start = get_16(buf+len+1); + res->end = get_16(buf+len+1)+(c&HPEE_PORT_SIZE_MASK)+1; + res->flags = IORESOURCE_IO; + printk("ioports %lx-%lx ", res->start, res->end); + result = request_resource(io_parent, res); + if (result < 0) { + printk("\n" KERN_ERR "EISA Enumerator: failed to claim EISA Bus address space!\n"); + return result; + } + } + + len+=3; + if (!(c & HPEE_PORT_MORE)) { + break; + } + } + + return len; +} + + +/* byte 1 and 2 is the port number to write + * and at byte 3 the value to write starts. + * I assume that there are and- and or- masks + * here when HPEE_PORT_INIT_MASK is set but I have + * not yet encountered this. */ +static int configure_port_init(const unsigned char *buf) +{ + int len=0; + u_int8_t c; + + while (len 80) { + printk("\n" KERN_ERR "eisa_enumerator: type info field too long (%d, max is 80)\n", len); + } + + return 1+len; +} + +static int configure_function(const unsigned char *buf, int *more) +{ + /* the init field seems to be a two-byte field + * which is non-zero if there are an other function following + * I think it is the length of the function def + */ + *more = get_16(buf); + + return 2; +} + +static int parse_slot_config(int slot, + const unsigned char *buf, + struct eeprom_eisa_slot_info *es, + struct resource *io_parent, + struct resource *mem_parent) +{ + int res=0; + int function_len; + unsigned int pos=0; + unsigned int maxlen; + int num_func=0; + u_int8_t flags; + int p0; + + char *board; + int id_string_used=0; + + if (NULL == (board = kmalloc(8, GFP_KERNEL))) { + return -1; + } + print_eisa_id(board, es->eisa_slot_id); + printk(KERN_INFO "EISA slot %d: %s %s ", + slot, board, es->flags&HPEE_FLAG_BOARD_IS_ISA ? "ISA" : "EISA"); + + maxlen = es->config_data_length < HPEE_MAX_LENGTH ? + es->config_data_length : HPEE_MAX_LENGTH; + while ((pos < maxlen) && (num_func <= es->num_functions)) { + pos+=configure_function(buf+pos, &function_len); + + if (!function_len) { + break; + } + num_func++; + p0 = pos; + pos += configure_choise(buf+pos, &flags); + + if (flags & HPEE_FUNCTION_INFO_F_DISABLED) { + /* function disabled, skip silently */ + pos = p0 + function_len; + continue; + } + if (flags & HPEE_FUNCTION_INFO_CFG_FREE_FORM) { + /* I have no idea how to handle this */ + printk("function %d have free-form confgiuration, skipping ", + num_func); + pos = p0 + function_len; + continue; + } + + /* the ordering of the sections need + * more investigation. + * Currently I think that memory comaed before IRQ + * I assume the order is LSB to MSB in the + * info flags + * eg type, memory, irq, dma, port, HPEE_PORT_init + */ + + if (flags & HPEE_FUNCTION_INFO_HAVE_TYPE) { + pos += configure_type_string(buf+pos); + } + + if (flags & HPEE_FUNCTION_INFO_HAVE_MEMORY) { + id_string_used=1; + pos += configure_memory(buf+pos, mem_parent, board); + } + + if (flags & HPEE_FUNCTION_INFO_HAVE_IRQ) { + pos += configure_irq(buf+pos); + } + + if (flags & HPEE_FUNCTION_INFO_HAVE_DMA) { + pos += configure_dma(buf+pos); + } + + if (flags & HPEE_FUNCTION_INFO_HAVE_PORT) { + id_string_used=1; + pos += configure_port(buf+pos, io_parent, board); + } + + if (flags & HPEE_FUNCTION_INFO_HAVE_PORT_INIT) { + pos += configure_port_init(buf+pos); + } + + if (p0 + function_len < pos) { + printk("\n" KERN_ERR "eisa_enumerator: function %d length mis-match " + "got %d, expected %d\n", + num_func, pos-p0, function_len); + res=-1; + break; + } + pos = p0 + function_len; + } + printk("\n"); + if (!id_string_used) { + kfree(board); + } + + if (pos != es->config_data_length) { + printk(KERN_ERR "eisa_enumerator: config data length mis-match got %d, expected %d\n", + pos, es->config_data_length); + res=-1; + } + + if (num_func != es->num_functions) { + printk(KERN_ERR "eisa_enumerator: number of functions mis-match got %d, expected %d\n", + num_func, es->num_functions); + res=-2; + } + + return res; + +} + +static int init_slot(int slot, struct eeprom_eisa_slot_info *es) +{ + unsigned int id; + + char id_string[8]; + + if (!(es->slot_info&HPEE_SLOT_INFO_NO_READID)) { + /* try to read the id of the board in the slot */ + id = le32_to_cpu(inl(SLOT2PORT(slot)+EPI)); + + if (0xffffffff == id) { + /* Maybe we didn't expect a card to be here... */ + if (es->eisa_slot_id == 0xffffffff) + return -1; + + /* this board is not here or it does not + * support readid + */ + printk(KERN_ERR "EISA slot %d a configured board was not detected (", + slot); + + print_eisa_id(id_string, es->eisa_slot_id); + printk(" expected %s)\n", id_string); + + return -1; + + } + if (es->eisa_slot_id != id) { + print_eisa_id(id_string, id); + printk(KERN_ERR "EISA slot %d id mis-match: got %s", + slot, id_string); + + print_eisa_id(id_string, es->eisa_slot_id); + printk(" expected %s \n", id_string); + + return -1; + + } + } + + /* now: we need to enable the board if + * it supports enabling and run through + * the port init sction if present + * and finally record any interrupt polarity + */ + if (es->slot_features & HPEE_SLOT_FEATURES_ENABLE) { + /* enable board */ + outb(0x01| inb(SLOT2PORT(slot)+EPI+4), + SLOT2PORT(slot)+EPI+4); + } + + return 0; +} + + +int eisa_enumerator(unsigned long eeprom_addr, + struct resource *io_parent, struct resource *mem_parent) +{ + int i; + struct eeprom_header *eh; + static char eeprom_buf[HPEE_MAX_LENGTH]; + + for (i=0; i < HPEE_MAX_LENGTH; i++) { + eeprom_buf[i] = gsc_readb(eeprom_addr+i); + } + + printk(KERN_INFO "Enumerating EISA bus\n"); + + eh = (struct eeprom_header*)(eeprom_buf); + for (i=0;inum_slots;i++) { + struct eeprom_eisa_slot_info *es; + + es = (struct eeprom_eisa_slot_info*) + (&eeprom_buf[HPEE_SLOT_INFO(i)]); + + if (-1==init_slot(i+1, es)) { + continue; + } + + if (es->config_data_offset < HPEE_MAX_LENGTH) { + if (parse_slot_config(i+1, &eeprom_buf[es->config_data_offset], + es, io_parent, mem_parent)) { + return -1; + } + } else { + printk (KERN_WARNING "EISA EEPROM offset 0x%x out of range\n",es->config_data_offset); + return -1; + } + } + return eh->num_slots; +} + -- cgit v1.2.2