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1911 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2006 Jakub Jermar
1911 jermar 3
 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup sparc64
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 * @{
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 */
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/**
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 * @file
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 * @brief   PCI driver.
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 */
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#include <arch/drivers/pci.h>
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#include <genarch/ofw/ofw_tree.h>
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#include <arch/trap/interrupt.h>
2089 decky 40
#include <mm/page.h>
1911 jermar 41
#include <mm/slab.h>
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#include <arch/types.h>
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#include <debug.h>
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#include <print.h>
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#include <func.h>
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#include <arch/asm.h>
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3675 svoboda 48
#define SABRE_INTERNAL_REG  0
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#define PSYCHO_INTERNAL_REG 2   
1911 jermar 50
 
3675 svoboda 51
#define OBIO_IMR_BASE   0x200
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#define OBIO_IMR(ino)   (OBIO_IMR_BASE + ((ino) & INO_MASK))
1911 jermar 53
 
3675 svoboda 54
#define OBIO_CIR_BASE   0x300
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#define OBIO_CIR(ino)   (OBIO_CIR_BASE + ((ino) & INO_MASK))
1984 jermar 56
 
3675 svoboda 57
static void obio_enable_interrupt(pci_t *, int);
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static void obio_clear_interrupt(pci_t *, int);
1984 jermar 59
 
3675 svoboda 60
static pci_t *pci_sabre_init(ofw_tree_node_t *);
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static pci_t *pci_psycho_init(ofw_tree_node_t *);
1911 jermar 62
 
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/** PCI operations for Sabre model. */
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static pci_operations_t pci_sabre_ops = {
3675 svoboda 65
    .enable_interrupt = obio_enable_interrupt,
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    .clear_interrupt = obio_clear_interrupt
1911 jermar 67
};
1984 jermar 68
/** PCI operations for Psycho model. */
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static pci_operations_t pci_psycho_ops = {
3675 svoboda 70
    .enable_interrupt = obio_enable_interrupt,
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    .clear_interrupt = obio_clear_interrupt
1984 jermar 72
};
1911 jermar 73
 
1984 jermar 74
/** Initialize PCI controller (model Sabre).
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 *
3675 svoboda 76
 * @param node      OpenFirmware device tree node of the Sabre.
1984 jermar 77
 *
3675 svoboda 78
 * @return      Address of the initialized PCI structure.
1984 jermar 79
 */
1911 jermar 80
pci_t *pci_sabre_init(ofw_tree_node_t *node)
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{
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    pci_t *pci;
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    ofw_tree_property_t *prop;
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    /*
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     * Get registers.
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     */
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    prop = ofw_tree_getprop(node, "reg");
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    if (!prop || !prop->value)
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        return NULL;
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92
    ofw_upa_reg_t *reg = prop->value;
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    count_t regs = prop->size / sizeof(ofw_upa_reg_t);
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3675 svoboda 95
    if (regs < SABRE_INTERNAL_REG + 1)
1911 jermar 96
        return NULL;
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    uintptr_t paddr;
3675 svoboda 99
    if (!ofw_upa_apply_ranges(node->parent, &reg[SABRE_INTERNAL_REG],
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        &paddr))
1911 jermar 101
        return NULL;
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    pci = (pci_t *) malloc(sizeof(pci_t), FRAME_ATOMIC);
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    if (!pci)
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        return NULL;
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107
    pci->model = PCI_SABRE;
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    pci->op = &pci_sabre_ops;
3675 svoboda 109
    pci->reg = (uint64_t *) hw_map(paddr, reg[SABRE_INTERNAL_REG].size);
1911 jermar 110
 
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    return pci;
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}
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1984 jermar 114
 
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/** Initialize the Psycho PCI controller.
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 *
3675 svoboda 117
 * @param node      OpenFirmware device tree node of the Psycho.
1984 jermar 118
 *
3675 svoboda 119
 * @return      Address of the initialized PCI structure.
1984 jermar 120
 */
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pci_t *pci_psycho_init(ofw_tree_node_t *node)
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{
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    pci_t *pci;
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    ofw_tree_property_t *prop;
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    /*
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     * Get registers.
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     */
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    prop = ofw_tree_getprop(node, "reg");
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    if (!prop || !prop->value)
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        return NULL;
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133
    ofw_upa_reg_t *reg = prop->value;
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    count_t regs = prop->size / sizeof(ofw_upa_reg_t);
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3675 svoboda 136
    if (regs < PSYCHO_INTERNAL_REG + 1)
1984 jermar 137
        return NULL;
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139
    uintptr_t paddr;
3675 svoboda 140
    if (!ofw_upa_apply_ranges(node->parent, &reg[PSYCHO_INTERNAL_REG],
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        &paddr))
1984 jermar 142
        return NULL;
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    pci = (pci_t *) malloc(sizeof(pci_t), FRAME_ATOMIC);
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    if (!pci)
146
        return NULL;
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148
    pci->model = PCI_PSYCHO;
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    pci->op = &pci_psycho_ops;
3675 svoboda 150
    pci->reg = (uint64_t *) hw_map(paddr, reg[PSYCHO_INTERNAL_REG].size);
1984 jermar 151
 
152
    return pci;
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}
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3675 svoboda 155
void obio_enable_interrupt(pci_t *pci, int inr)
1911 jermar 156
{
3675 svoboda 157
    pci->reg[OBIO_IMR(inr & INO_MASK)] |= IMAP_V_MASK;
1911 jermar 158
}
159
 
3675 svoboda 160
void obio_clear_interrupt(pci_t *pci, int inr)
1911 jermar 161
{
3675 svoboda 162
    pci->reg[OBIO_CIR(inr & INO_MASK)] = 0; /* set IDLE */
1911 jermar 163
}
164
 
165
/** Initialize PCI controller. */
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pci_t *pci_init(ofw_tree_node_t *node)
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{
168
    ofw_tree_property_t *prop;
169
 
170
    /*
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     * First, verify this is a PCI node.
172
     */
173
    ASSERT(strcmp(ofw_tree_node_name(node), "pci") == 0);
174
 
175
    /*
176
     * Determine PCI controller model.
177
     */
178
    prop = ofw_tree_getprop(node, "model");
179
    if (!prop || !prop->value)
180
        return NULL;
181
 
182
    if (strcmp(prop->value, "SUNW,sabre") == 0) {
183
        /*
184
         * PCI controller Sabre.
185
         * This model is found on UltraSPARC IIi based machines.
186
         */
187
        return pci_sabre_init(node);
1984 jermar 188
    } else if (strcmp(prop->value, "SUNW,psycho") == 0) {
189
        /*
190
         * PCI controller Psycho.
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         * Used on UltraSPARC II based processors, for instance,
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         * on Ultra 60.
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         */
194
        return pci_psycho_init(node);
1911 jermar 195
    } else {
196
        /*
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         * Unsupported model.
198
         */
199
        printf("Unsupported PCI controller model (%s).\n", prop->value);
200
    }
201
 
202
    return NULL;
203
}
204
 
205
void pci_enable_interrupt(pci_t *pci, int inr)
206
{
207
    ASSERT(pci->op && pci->op->enable_interrupt);
208
    pci->op->enable_interrupt(pci, inr);
209
}
210
 
3675 svoboda 211
void pci_clear_interrupt(void *pcip, int inr)
1911 jermar 212
{
3675 svoboda 213
    pci_t *pci = (pci_t *)pcip;
214
 
1911 jermar 215
    ASSERT(pci->op && pci->op->clear_interrupt);
216
    pci->op->clear_interrupt(pci, inr);
217
}
218
 
219
/** @}
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 */