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767 lines
19 KiB
767 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family |
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* of PCI-SCSI IO processors. |
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* |
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* Copyright (C) 1999-2001 Gerard Roudier <[email protected]> |
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* |
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* This driver is derived from the Linux sym53c8xx driver. |
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* Copyright (C) 1998-2000 Gerard Roudier |
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* |
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* The sym53c8xx driver is derived from the ncr53c8xx driver that had been |
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* a port of the FreeBSD ncr driver to Linux-1.2.13. |
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* |
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* The original ncr driver has been written for 386bsd and FreeBSD by |
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* Wolfgang Stanglmeier <[email protected]> |
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* Stefan Esser <[email protected]> |
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* Copyright (C) 1994 Wolfgang Stanglmeier |
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* |
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* Other major contributions: |
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* |
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* NVRAM detection and reading. |
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* Copyright (C) 1997 Richard Waltham <[email protected]> |
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* |
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*----------------------------------------------------------------------------- |
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*/ |
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|
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#include "sym_glue.h" |
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#include "sym_nvram.h" |
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|
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#ifdef SYM_CONF_DEBUG_NVRAM |
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static u_char Tekram_boot_delay[7] = {3, 5, 10, 20, 30, 60, 120}; |
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#endif |
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|
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/* |
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* Get host setup from NVRAM. |
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*/ |
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void sym_nvram_setup_host(struct Scsi_Host *shost, struct sym_hcb *np, struct sym_nvram *nvram) |
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{ |
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/* |
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* Get parity checking, host ID, verbose mode |
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* and miscellaneous host flags from NVRAM. |
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*/ |
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switch (nvram->type) { |
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case SYM_SYMBIOS_NVRAM: |
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if (!(nvram->data.Symbios.flags & SYMBIOS_PARITY_ENABLE)) |
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np->rv_scntl0 &= ~0x0a; |
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np->myaddr = nvram->data.Symbios.host_id & 0x0f; |
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if (nvram->data.Symbios.flags & SYMBIOS_VERBOSE_MSGS) |
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np->verbose += 1; |
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if (nvram->data.Symbios.flags1 & SYMBIOS_SCAN_HI_LO) |
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shost->reverse_ordering = 1; |
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if (nvram->data.Symbios.flags2 & SYMBIOS_AVOID_BUS_RESET) |
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np->usrflags |= SYM_AVOID_BUS_RESET; |
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break; |
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case SYM_TEKRAM_NVRAM: |
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np->myaddr = nvram->data.Tekram.host_id & 0x0f; |
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break; |
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#ifdef CONFIG_PARISC |
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case SYM_PARISC_PDC: |
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if (nvram->data.parisc.host_id != -1) |
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np->myaddr = nvram->data.parisc.host_id; |
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if (nvram->data.parisc.factor != -1) |
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np->minsync = nvram->data.parisc.factor; |
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if (nvram->data.parisc.width != -1) |
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np->maxwide = nvram->data.parisc.width; |
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switch (nvram->data.parisc.mode) { |
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case 0: np->scsi_mode = SMODE_SE; break; |
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case 1: np->scsi_mode = SMODE_HVD; break; |
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case 2: np->scsi_mode = SMODE_LVD; break; |
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default: break; |
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} |
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#endif |
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default: |
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break; |
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} |
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} |
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|
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/* |
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* Get target set-up from Symbios format NVRAM. |
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*/ |
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static void |
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sym_Symbios_setup_target(struct sym_tcb *tp, int target, Symbios_nvram *nvram) |
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{ |
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Symbios_target *tn = &nvram->target[target]; |
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|
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if (!(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)) |
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tp->usrtags = 0; |
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if (!(tn->flags & SYMBIOS_DISCONNECT_ENABLE)) |
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tp->usrflags &= ~SYM_DISC_ENABLED; |
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if (!(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME)) |
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tp->usrflags |= SYM_SCAN_BOOT_DISABLED; |
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if (!(tn->flags & SYMBIOS_SCAN_LUNS)) |
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tp->usrflags |= SYM_SCAN_LUNS_DISABLED; |
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tp->usr_period = (tn->sync_period + 3) / 4; |
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tp->usr_width = (tn->bus_width == 0x8) ? 0 : 1; |
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} |
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static const unsigned char Tekram_sync[16] = { |
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25, 31, 37, 43, 50, 62, 75, 125, 12, 15, 18, 21, 6, 7, 9, 10 |
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}; |
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/* |
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* Get target set-up from Tekram format NVRAM. |
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*/ |
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static void |
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sym_Tekram_setup_target(struct sym_tcb *tp, int target, Tekram_nvram *nvram) |
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{ |
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struct Tekram_target *tn = &nvram->target[target]; |
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if (tn->flags & TEKRAM_TAGGED_COMMANDS) { |
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tp->usrtags = 2 << nvram->max_tags_index; |
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} |
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if (tn->flags & TEKRAM_DISCONNECT_ENABLE) |
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tp->usrflags |= SYM_DISC_ENABLED; |
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if (tn->flags & TEKRAM_SYNC_NEGO) |
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tp->usr_period = Tekram_sync[tn->sync_index & 0xf]; |
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tp->usr_width = (tn->flags & TEKRAM_WIDE_NEGO) ? 1 : 0; |
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} |
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/* |
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* Get target setup from NVRAM. |
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*/ |
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void sym_nvram_setup_target(struct sym_tcb *tp, int target, struct sym_nvram *nvp) |
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{ |
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switch (nvp->type) { |
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case SYM_SYMBIOS_NVRAM: |
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sym_Symbios_setup_target(tp, target, &nvp->data.Symbios); |
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break; |
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case SYM_TEKRAM_NVRAM: |
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sym_Tekram_setup_target(tp, target, &nvp->data.Tekram); |
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break; |
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default: |
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break; |
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} |
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} |
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|
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#ifdef SYM_CONF_DEBUG_NVRAM |
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/* |
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* Dump Symbios format NVRAM for debugging purpose. |
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*/ |
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static void sym_display_Symbios_nvram(struct sym_device *np, Symbios_nvram *nvram) |
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{ |
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int i; |
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|
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/* display Symbios nvram host data */ |
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printf("%s: HOST ID=%d%s%s%s%s%s%s\n", |
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sym_name(np), nvram->host_id & 0x0f, |
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(nvram->flags & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"", |
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(nvram->flags & SYMBIOS_PARITY_ENABLE) ? " PARITY" :"", |
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(nvram->flags & SYMBIOS_VERBOSE_MSGS) ? " VERBOSE" :"", |
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(nvram->flags & SYMBIOS_CHS_MAPPING) ? " CHS_ALT" :"", |
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(nvram->flags2 & SYMBIOS_AVOID_BUS_RESET)?" NO_RESET" :"", |
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(nvram->flags1 & SYMBIOS_SCAN_HI_LO) ? " HI_LO" :""); |
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|
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/* display Symbios nvram drive data */ |
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for (i = 0 ; i < 15 ; i++) { |
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struct Symbios_target *tn = &nvram->target[i]; |
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printf("%s-%d:%s%s%s%s WIDTH=%d SYNC=%d TMO=%d\n", |
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sym_name(np), i, |
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(tn->flags & SYMBIOS_DISCONNECT_ENABLE) ? " DISC" : "", |
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(tn->flags & SYMBIOS_SCAN_AT_BOOT_TIME) ? " SCAN_BOOT" : "", |
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(tn->flags & SYMBIOS_SCAN_LUNS) ? " SCAN_LUNS" : "", |
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(tn->flags & SYMBIOS_QUEUE_TAGS_ENABLED)? " TCQ" : "", |
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tn->bus_width, |
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tn->sync_period / 4, |
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tn->timeout); |
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} |
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} |
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/* |
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* Dump TEKRAM format NVRAM for debugging purpose. |
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*/ |
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static void sym_display_Tekram_nvram(struct sym_device *np, Tekram_nvram *nvram) |
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{ |
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int i, tags, boot_delay; |
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char *rem; |
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|
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/* display Tekram nvram host data */ |
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tags = 2 << nvram->max_tags_index; |
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boot_delay = 0; |
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if (nvram->boot_delay_index < 6) |
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boot_delay = Tekram_boot_delay[nvram->boot_delay_index]; |
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switch ((nvram->flags & TEKRAM_REMOVABLE_FLAGS) >> 6) { |
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default: |
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case 0: rem = ""; break; |
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case 1: rem = " REMOVABLE=boot device"; break; |
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case 2: rem = " REMOVABLE=all"; break; |
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} |
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printf("%s: HOST ID=%d%s%s%s%s%s%s%s%s%s BOOT DELAY=%d tags=%d\n", |
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sym_name(np), nvram->host_id & 0x0f, |
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(nvram->flags1 & SYMBIOS_SCAM_ENABLE) ? " SCAM" :"", |
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(nvram->flags & TEKRAM_MORE_THAN_2_DRIVES) ? " >2DRIVES":"", |
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(nvram->flags & TEKRAM_DRIVES_SUP_1GB) ? " >1GB" :"", |
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(nvram->flags & TEKRAM_RESET_ON_POWER_ON) ? " RESET" :"", |
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(nvram->flags & TEKRAM_ACTIVE_NEGATION) ? " ACT_NEG" :"", |
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(nvram->flags & TEKRAM_IMMEDIATE_SEEK) ? " IMM_SEEK" :"", |
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(nvram->flags & TEKRAM_SCAN_LUNS) ? " SCAN_LUNS" :"", |
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(nvram->flags1 & TEKRAM_F2_F6_ENABLED) ? " F2_F6" :"", |
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rem, boot_delay, tags); |
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/* display Tekram nvram drive data */ |
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for (i = 0; i <= 15; i++) { |
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int sync, j; |
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struct Tekram_target *tn = &nvram->target[i]; |
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j = tn->sync_index & 0xf; |
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sync = Tekram_sync[j]; |
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printf("%s-%d:%s%s%s%s%s%s PERIOD=%d\n", |
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sym_name(np), i, |
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(tn->flags & TEKRAM_PARITY_CHECK) ? " PARITY" : "", |
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(tn->flags & TEKRAM_SYNC_NEGO) ? " SYNC" : "", |
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(tn->flags & TEKRAM_DISCONNECT_ENABLE) ? " DISC" : "", |
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(tn->flags & TEKRAM_START_CMD) ? " START" : "", |
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(tn->flags & TEKRAM_TAGGED_COMMANDS) ? " TCQ" : "", |
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(tn->flags & TEKRAM_WIDE_NEGO) ? " WIDE" : "", |
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sync); |
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} |
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} |
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#else |
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static void sym_display_Symbios_nvram(struct sym_device *np, Symbios_nvram *nvram) { (void)np; (void)nvram; } |
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static void sym_display_Tekram_nvram(struct sym_device *np, Tekram_nvram *nvram) { (void)np; (void)nvram; } |
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#endif /* SYM_CONF_DEBUG_NVRAM */ |
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/* |
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* 24C16 EEPROM reading. |
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* |
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* GPIO0 - data in/data out |
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* GPIO1 - clock |
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* Symbios NVRAM wiring now also used by Tekram. |
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*/ |
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#define SET_BIT 0 |
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#define CLR_BIT 1 |
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#define SET_CLK 2 |
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#define CLR_CLK 3 |
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/* |
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* Set/clear data/clock bit in GPIO0 |
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*/ |
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static void S24C16_set_bit(struct sym_device *np, u_char write_bit, u_char *gpreg, |
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int bit_mode) |
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{ |
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udelay(5); |
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switch (bit_mode) { |
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case SET_BIT: |
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*gpreg |= write_bit; |
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break; |
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case CLR_BIT: |
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*gpreg &= 0xfe; |
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break; |
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case SET_CLK: |
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*gpreg |= 0x02; |
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break; |
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case CLR_CLK: |
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*gpreg &= 0xfd; |
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break; |
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} |
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OUTB(np, nc_gpreg, *gpreg); |
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INB(np, nc_mbox1); |
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udelay(5); |
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} |
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/* |
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* Send START condition to NVRAM to wake it up. |
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*/ |
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static void S24C16_start(struct sym_device *np, u_char *gpreg) |
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{ |
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S24C16_set_bit(np, 1, gpreg, SET_BIT); |
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S24C16_set_bit(np, 0, gpreg, SET_CLK); |
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S24C16_set_bit(np, 0, gpreg, CLR_BIT); |
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S24C16_set_bit(np, 0, gpreg, CLR_CLK); |
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} |
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/* |
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* Send STOP condition to NVRAM - puts NVRAM to sleep... ZZzzzz!! |
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*/ |
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static void S24C16_stop(struct sym_device *np, u_char *gpreg) |
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{ |
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S24C16_set_bit(np, 0, gpreg, SET_CLK); |
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S24C16_set_bit(np, 1, gpreg, SET_BIT); |
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} |
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/* |
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* Read or write a bit to the NVRAM, |
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* read if GPIO0 input else write if GPIO0 output |
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*/ |
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static void S24C16_do_bit(struct sym_device *np, u_char *read_bit, u_char write_bit, |
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u_char *gpreg) |
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{ |
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S24C16_set_bit(np, write_bit, gpreg, SET_BIT); |
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S24C16_set_bit(np, 0, gpreg, SET_CLK); |
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if (read_bit) |
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*read_bit = INB(np, nc_gpreg); |
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S24C16_set_bit(np, 0, gpreg, CLR_CLK); |
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S24C16_set_bit(np, 0, gpreg, CLR_BIT); |
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} |
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/* |
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* Output an ACK to the NVRAM after reading, |
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* change GPIO0 to output and when done back to an input |
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*/ |
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static void S24C16_write_ack(struct sym_device *np, u_char write_bit, u_char *gpreg, |
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u_char *gpcntl) |
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{ |
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OUTB(np, nc_gpcntl, *gpcntl & 0xfe); |
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S24C16_do_bit(np, NULL, write_bit, gpreg); |
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OUTB(np, nc_gpcntl, *gpcntl); |
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} |
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|
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/* |
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* Input an ACK from NVRAM after writing, |
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* change GPIO0 to input and when done back to an output |
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*/ |
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static void S24C16_read_ack(struct sym_device *np, u_char *read_bit, u_char *gpreg, |
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u_char *gpcntl) |
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{ |
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OUTB(np, nc_gpcntl, *gpcntl | 0x01); |
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S24C16_do_bit(np, read_bit, 1, gpreg); |
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OUTB(np, nc_gpcntl, *gpcntl); |
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} |
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|
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/* |
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* WRITE a byte to the NVRAM and then get an ACK to see it was accepted OK, |
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* GPIO0 must already be set as an output |
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*/ |
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static void S24C16_write_byte(struct sym_device *np, u_char *ack_data, u_char write_data, |
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u_char *gpreg, u_char *gpcntl) |
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{ |
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int x; |
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|
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for (x = 0; x < 8; x++) |
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S24C16_do_bit(np, NULL, (write_data >> (7 - x)) & 0x01, gpreg); |
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S24C16_read_ack(np, ack_data, gpreg, gpcntl); |
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} |
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|
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/* |
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* READ a byte from the NVRAM and then send an ACK to say we have got it, |
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* GPIO0 must already be set as an input |
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*/ |
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static void S24C16_read_byte(struct sym_device *np, u_char *read_data, u_char ack_data, |
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u_char *gpreg, u_char *gpcntl) |
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{ |
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int x; |
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u_char read_bit; |
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*read_data = 0; |
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for (x = 0; x < 8; x++) { |
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S24C16_do_bit(np, &read_bit, 1, gpreg); |
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*read_data |= ((read_bit & 0x01) << (7 - x)); |
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} |
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S24C16_write_ack(np, ack_data, gpreg, gpcntl); |
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} |
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#ifdef SYM_CONF_NVRAM_WRITE_SUPPORT |
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/* |
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* Write 'len' bytes starting at 'offset'. |
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*/ |
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static int sym_write_S24C16_nvram(struct sym_device *np, int offset, |
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u_char *data, int len) |
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{ |
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u_char gpcntl, gpreg; |
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u_char old_gpcntl, old_gpreg; |
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u_char ack_data; |
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int x; |
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|
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/* save current state of GPCNTL and GPREG */ |
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old_gpreg = INB(np, nc_gpreg); |
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old_gpcntl = INB(np, nc_gpcntl); |
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gpcntl = old_gpcntl & 0x1c; |
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|
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/* set up GPREG & GPCNTL to set GPIO0 and GPIO1 in to known state */ |
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OUTB(np, nc_gpreg, old_gpreg); |
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OUTB(np, nc_gpcntl, gpcntl); |
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|
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/* this is to set NVRAM into a known state with GPIO0/1 both low */ |
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gpreg = old_gpreg; |
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S24C16_set_bit(np, 0, &gpreg, CLR_CLK); |
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S24C16_set_bit(np, 0, &gpreg, CLR_BIT); |
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|
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/* now set NVRAM inactive with GPIO0/1 both high */ |
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S24C16_stop(np, &gpreg); |
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|
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/* NVRAM has to be written in segments of 16 bytes */ |
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for (x = 0; x < len ; x += 16) { |
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do { |
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S24C16_start(np, &gpreg); |
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S24C16_write_byte(np, &ack_data, |
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0xa0 | (((offset+x) >> 7) & 0x0e), |
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&gpreg, &gpcntl); |
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} while (ack_data & 0x01); |
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S24C16_write_byte(np, &ack_data, (offset+x) & 0xff, |
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&gpreg, &gpcntl); |
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|
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for (y = 0; y < 16; y++) |
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S24C16_write_byte(np, &ack_data, data[x+y], |
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&gpreg, &gpcntl); |
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S24C16_stop(np, &gpreg); |
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} |
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|
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/* return GPIO0/1 to original states after having accessed NVRAM */ |
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OUTB(np, nc_gpcntl, old_gpcntl); |
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OUTB(np, nc_gpreg, old_gpreg); |
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|
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return 0; |
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} |
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#endif /* SYM_CONF_NVRAM_WRITE_SUPPORT */ |
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|
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/* |
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* Read 'len' bytes starting at 'offset'. |
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*/ |
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static int sym_read_S24C16_nvram(struct sym_device *np, int offset, u_char *data, int len) |
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{ |
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u_char gpcntl, gpreg; |
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u_char old_gpcntl, old_gpreg; |
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u_char ack_data; |
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int retv = 1; |
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int x; |
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|
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/* save current state of GPCNTL and GPREG */ |
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old_gpreg = INB(np, nc_gpreg); |
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old_gpcntl = INB(np, nc_gpcntl); |
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gpcntl = old_gpcntl & 0x1c; |
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|
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/* set up GPREG & GPCNTL to set GPIO0 and GPIO1 in to known state */ |
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OUTB(np, nc_gpreg, old_gpreg); |
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OUTB(np, nc_gpcntl, gpcntl); |
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|
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/* this is to set NVRAM into a known state with GPIO0/1 both low */ |
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gpreg = old_gpreg; |
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S24C16_set_bit(np, 0, &gpreg, CLR_CLK); |
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S24C16_set_bit(np, 0, &gpreg, CLR_BIT); |
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|
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/* now set NVRAM inactive with GPIO0/1 both high */ |
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S24C16_stop(np, &gpreg); |
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|
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/* activate NVRAM */ |
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S24C16_start(np, &gpreg); |
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|
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/* write device code and random address MSB */ |
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S24C16_write_byte(np, &ack_data, |
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0xa0 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl); |
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if (ack_data & 0x01) |
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goto out; |
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|
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/* write random address LSB */ |
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S24C16_write_byte(np, &ack_data, |
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offset & 0xff, &gpreg, &gpcntl); |
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if (ack_data & 0x01) |
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goto out; |
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|
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/* regenerate START state to set up for reading */ |
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S24C16_start(np, &gpreg); |
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|
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/* rewrite device code and address MSB with read bit set (lsb = 0x01) */ |
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S24C16_write_byte(np, &ack_data, |
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0xa1 | ((offset >> 7) & 0x0e), &gpreg, &gpcntl); |
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if (ack_data & 0x01) |
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goto out; |
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|
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/* now set up GPIO0 for inputting data */ |
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gpcntl |= 0x01; |
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OUTB(np, nc_gpcntl, gpcntl); |
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|
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/* input all requested data - only part of total NVRAM */ |
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for (x = 0; x < len; x++) |
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S24C16_read_byte(np, &data[x], (x == (len-1)), &gpreg, &gpcntl); |
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|
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/* finally put NVRAM back in inactive mode */ |
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gpcntl &= 0xfe; |
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OUTB(np, nc_gpcntl, gpcntl); |
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S24C16_stop(np, &gpreg); |
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retv = 0; |
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out: |
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/* return GPIO0/1 to original states after having accessed NVRAM */ |
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OUTB(np, nc_gpcntl, old_gpcntl); |
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OUTB(np, nc_gpreg, old_gpreg); |
|
|
|
return retv; |
|
} |
|
|
|
#undef SET_BIT |
|
#undef CLR_BIT |
|
#undef SET_CLK |
|
#undef CLR_CLK |
|
|
|
/* |
|
* Try reading Symbios NVRAM. |
|
* Return 0 if OK. |
|
*/ |
|
static int sym_read_Symbios_nvram(struct sym_device *np, Symbios_nvram *nvram) |
|
{ |
|
static u_char Symbios_trailer[6] = {0xfe, 0xfe, 0, 0, 0, 0}; |
|
u_char *data = (u_char *) nvram; |
|
int len = sizeof(*nvram); |
|
u_short csum; |
|
int x; |
|
|
|
/* probe the 24c16 and read the SYMBIOS 24c16 area */ |
|
if (sym_read_S24C16_nvram (np, SYMBIOS_NVRAM_ADDRESS, data, len)) |
|
return 1; |
|
|
|
/* check valid NVRAM signature, verify byte count and checksum */ |
|
if (nvram->type != 0 || |
|
memcmp(nvram->trailer, Symbios_trailer, 6) || |
|
nvram->byte_count != len - 12) |
|
return 1; |
|
|
|
/* verify checksum */ |
|
for (x = 6, csum = 0; x < len - 6; x++) |
|
csum += data[x]; |
|
if (csum != nvram->checksum) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* 93C46 EEPROM reading. |
|
* |
|
* GPIO0 - data in |
|
* GPIO1 - data out |
|
* GPIO2 - clock |
|
* GPIO4 - chip select |
|
* |
|
* Used by Tekram. |
|
*/ |
|
|
|
/* |
|
* Pulse clock bit in GPIO0 |
|
*/ |
|
static void T93C46_Clk(struct sym_device *np, u_char *gpreg) |
|
{ |
|
OUTB(np, nc_gpreg, *gpreg | 0x04); |
|
INB(np, nc_mbox1); |
|
udelay(2); |
|
OUTB(np, nc_gpreg, *gpreg); |
|
} |
|
|
|
/* |
|
* Read bit from NVRAM |
|
*/ |
|
static void T93C46_Read_Bit(struct sym_device *np, u_char *read_bit, u_char *gpreg) |
|
{ |
|
udelay(2); |
|
T93C46_Clk(np, gpreg); |
|
*read_bit = INB(np, nc_gpreg); |
|
} |
|
|
|
/* |
|
* Write bit to GPIO0 |
|
*/ |
|
static void T93C46_Write_Bit(struct sym_device *np, u_char write_bit, u_char *gpreg) |
|
{ |
|
if (write_bit & 0x01) |
|
*gpreg |= 0x02; |
|
else |
|
*gpreg &= 0xfd; |
|
|
|
*gpreg |= 0x10; |
|
|
|
OUTB(np, nc_gpreg, *gpreg); |
|
INB(np, nc_mbox1); |
|
udelay(2); |
|
|
|
T93C46_Clk(np, gpreg); |
|
} |
|
|
|
/* |
|
* Send STOP condition to NVRAM - puts NVRAM to sleep... ZZZzzz!! |
|
*/ |
|
static void T93C46_Stop(struct sym_device *np, u_char *gpreg) |
|
{ |
|
*gpreg &= 0xef; |
|
OUTB(np, nc_gpreg, *gpreg); |
|
INB(np, nc_mbox1); |
|
udelay(2); |
|
|
|
T93C46_Clk(np, gpreg); |
|
} |
|
|
|
/* |
|
* Send read command and address to NVRAM |
|
*/ |
|
static void T93C46_Send_Command(struct sym_device *np, u_short write_data, |
|
u_char *read_bit, u_char *gpreg) |
|
{ |
|
int x; |
|
|
|
/* send 9 bits, start bit (1), command (2), address (6) */ |
|
for (x = 0; x < 9; x++) |
|
T93C46_Write_Bit(np, (u_char) (write_data >> (8 - x)), gpreg); |
|
|
|
*read_bit = INB(np, nc_gpreg); |
|
} |
|
|
|
/* |
|
* READ 2 bytes from the NVRAM |
|
*/ |
|
static void T93C46_Read_Word(struct sym_device *np, |
|
unsigned short *nvram_data, unsigned char *gpreg) |
|
{ |
|
int x; |
|
u_char read_bit; |
|
|
|
*nvram_data = 0; |
|
for (x = 0; x < 16; x++) { |
|
T93C46_Read_Bit(np, &read_bit, gpreg); |
|
|
|
if (read_bit & 0x01) |
|
*nvram_data |= (0x01 << (15 - x)); |
|
else |
|
*nvram_data &= ~(0x01 << (15 - x)); |
|
} |
|
} |
|
|
|
/* |
|
* Read Tekram NvRAM data. |
|
*/ |
|
static int T93C46_Read_Data(struct sym_device *np, unsigned short *data, |
|
int len, unsigned char *gpreg) |
|
{ |
|
int x; |
|
|
|
for (x = 0; x < len; x++) { |
|
unsigned char read_bit; |
|
/* output read command and address */ |
|
T93C46_Send_Command(np, 0x180 | x, &read_bit, gpreg); |
|
if (read_bit & 0x01) |
|
return 1; /* Bad */ |
|
T93C46_Read_Word(np, &data[x], gpreg); |
|
T93C46_Stop(np, gpreg); |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* Try reading 93C46 Tekram NVRAM. |
|
*/ |
|
static int sym_read_T93C46_nvram(struct sym_device *np, Tekram_nvram *nvram) |
|
{ |
|
u_char gpcntl, gpreg; |
|
u_char old_gpcntl, old_gpreg; |
|
int retv; |
|
|
|
/* save current state of GPCNTL and GPREG */ |
|
old_gpreg = INB(np, nc_gpreg); |
|
old_gpcntl = INB(np, nc_gpcntl); |
|
|
|
/* set up GPREG & GPCNTL to set GPIO0/1/2/4 in to known state, 0 in, |
|
1/2/4 out */ |
|
gpreg = old_gpreg & 0xe9; |
|
OUTB(np, nc_gpreg, gpreg); |
|
gpcntl = (old_gpcntl & 0xe9) | 0x09; |
|
OUTB(np, nc_gpcntl, gpcntl); |
|
|
|
/* input all of NVRAM, 64 words */ |
|
retv = T93C46_Read_Data(np, (u_short *) nvram, |
|
sizeof(*nvram) / sizeof(short), &gpreg); |
|
|
|
/* return GPIO0/1/2/4 to original states after having accessed NVRAM */ |
|
OUTB(np, nc_gpcntl, old_gpcntl); |
|
OUTB(np, nc_gpreg, old_gpreg); |
|
|
|
return retv; |
|
} |
|
|
|
/* |
|
* Try reading Tekram NVRAM. |
|
* Return 0 if OK. |
|
*/ |
|
static int sym_read_Tekram_nvram (struct sym_device *np, Tekram_nvram *nvram) |
|
{ |
|
u_char *data = (u_char *) nvram; |
|
int len = sizeof(*nvram); |
|
u_short csum; |
|
int x; |
|
|
|
switch (np->pdev->device) { |
|
case PCI_DEVICE_ID_NCR_53C885: |
|
case PCI_DEVICE_ID_NCR_53C895: |
|
case PCI_DEVICE_ID_NCR_53C896: |
|
x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS, |
|
data, len); |
|
break; |
|
case PCI_DEVICE_ID_NCR_53C875: |
|
x = sym_read_S24C16_nvram(np, TEKRAM_24C16_NVRAM_ADDRESS, |
|
data, len); |
|
if (!x) |
|
break; |
|
fallthrough; |
|
default: |
|
x = sym_read_T93C46_nvram(np, nvram); |
|
break; |
|
} |
|
if (x) |
|
return 1; |
|
|
|
/* verify checksum */ |
|
for (x = 0, csum = 0; x < len - 1; x += 2) |
|
csum += data[x] + (data[x+1] << 8); |
|
if (csum != 0x1234) |
|
return 1; |
|
|
|
return 0; |
|
} |
|
|
|
#ifdef CONFIG_PARISC |
|
/* |
|
* Host firmware (PDC) keeps a table for altering SCSI capabilities. |
|
* Many newer machines export one channel of 53c896 chip as SE, 50-pin HD. |
|
* Also used for Multi-initiator SCSI clusters to set the SCSI Initiator ID. |
|
*/ |
|
static int sym_read_parisc_pdc(struct sym_device *np, struct pdc_initiator *pdc) |
|
{ |
|
struct hardware_path hwpath; |
|
get_pci_node_path(np->pdev, &hwpath); |
|
if (!pdc_get_initiator(&hwpath, pdc)) |
|
return 0; |
|
|
|
return SYM_PARISC_PDC; |
|
} |
|
#else |
|
static inline int sym_read_parisc_pdc(struct sym_device *np, |
|
struct pdc_initiator *x) |
|
{ |
|
return 0; |
|
} |
|
#endif |
|
|
|
/* |
|
* Try reading Symbios or Tekram NVRAM |
|
*/ |
|
int sym_read_nvram(struct sym_device *np, struct sym_nvram *nvp) |
|
{ |
|
if (!sym_read_Symbios_nvram(np, &nvp->data.Symbios)) { |
|
nvp->type = SYM_SYMBIOS_NVRAM; |
|
sym_display_Symbios_nvram(np, &nvp->data.Symbios); |
|
} else if (!sym_read_Tekram_nvram(np, &nvp->data.Tekram)) { |
|
nvp->type = SYM_TEKRAM_NVRAM; |
|
sym_display_Tekram_nvram(np, &nvp->data.Tekram); |
|
} else { |
|
nvp->type = sym_read_parisc_pdc(np, &nvp->data.parisc); |
|
} |
|
return nvp->type; |
|
} |
|
|
|
char *sym_nvram_type(struct sym_nvram *nvp) |
|
{ |
|
switch (nvp->type) { |
|
case SYM_SYMBIOS_NVRAM: |
|
return "Symbios NVRAM"; |
|
case SYM_TEKRAM_NVRAM: |
|
return "Tekram NVRAM"; |
|
case SYM_PARISC_PDC: |
|
return "PA-RISC Firmware"; |
|
default: |
|
return "No NVRAM"; |
|
} |
|
}
|
|
|