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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2010 Mark Marshall
*
* 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; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <stdlib.h>
#include <strings.h>
#include <string.h>
#include "flash.h"
#include "programmer.h"
#include "hwaccess.h"
#define PCI_VENDOR_ID_OGP 0x1227
/* These are the register addresses for the OGD1 / OGA1. If they are
* different for later versions of the hardware then we will need
* logic to select between the different hardware versions. */
#define OGA1_XP10_BPROM_SI 0x0040 /* W */
#define OGA1_XP10_BPROM_SO 0x0040 /* R */
#define OGA1_XP10_BPROM_CE_BAR 0x0044 /* W */
#define OGA1_XP10_BPROM_SCK 0x0048 /* W */
#define OGA1_XP10_BPROM_REG_SEL 0x004C /* W */
#define OGA1_XP10_CPROM_SI 0x0050 /* W */
#define OGA1_XP10_CPROM_SO 0x0050 /* R */
#define OGA1_XP10_CPROM_CE_BAR 0x0054 /* W */
#define OGA1_XP10_CPROM_SCK 0x0058 /* W */
#define OGA1_XP10_CPROM_REG_SEL 0x005C /* W */
struct ogp_spi_data {
uint8_t *spibar;
uint32_t reg_sel;
uint32_t reg_siso;
uint32_t reg__ce;
uint32_t reg_sck;
};
const struct dev_entry ogp_spi[] = {
{PCI_VENDOR_ID_OGP, 0x0000, OK, "Open Graphics Project", "Development Board OGD1"},
{0},
};
static void ogp_request_spibus(void *spi_data)
{
struct ogp_spi_data *data = spi_data;
pci_mmio_writel(1, data->spibar + data->reg_sel);
}
static void ogp_release_spibus(void *spi_data)
{
struct ogp_spi_data *data = spi_data;
pci_mmio_writel(0, data->spibar + data->reg_sel);
}
static void ogp_bitbang_set_cs(int val, void *spi_data)
{
struct ogp_spi_data *data = spi_data;
pci_mmio_writel(val, data->spibar + data->reg__ce);
}
static void ogp_bitbang_set_sck(int val, void *spi_data)
{
struct ogp_spi_data *data = spi_data;
pci_mmio_writel(val, data->spibar + data->reg_sck);
}
static void ogp_bitbang_set_mosi(int val, void *spi_data)
{
struct ogp_spi_data *data = spi_data;
pci_mmio_writel(val, data->spibar + data->reg_siso);
}
static int ogp_bitbang_get_miso(void *spi_data)
{
struct ogp_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + data->reg_siso);
return tmp & 0x1;
}
static const struct bitbang_spi_master bitbang_spi_master_ogp = {
.set_cs = ogp_bitbang_set_cs,
.set_sck = ogp_bitbang_set_sck,
.set_mosi = ogp_bitbang_set_mosi,
.get_miso = ogp_bitbang_get_miso,
.request_bus = ogp_request_spibus,
.release_bus = ogp_release_spibus,
.half_period = 0,
};
static int ogp_spi_shutdown(void *data)
{
free(data);
return 0;
}
int ogp_spi_init(void)
{
struct pci_dev *dev = NULL;
char *type;
uint8_t *ogp_spibar;
uint32_t ogp_reg_sel;
uint32_t ogp_reg_siso;
uint32_t ogp_reg__ce;
uint32_t ogp_reg_sck;
type = extract_programmer_param("rom");
if (!type) {
msg_perr("Please use flashrom -p ogp_spi:rom=... to specify "
"which flashchip you want to access.\n");
return 1;
} else if (!strcasecmp(type, "bprom") || !strcasecmp(type, "bios")) {
ogp_reg_sel = OGA1_XP10_BPROM_REG_SEL;
ogp_reg_siso = OGA1_XP10_BPROM_SI;
ogp_reg__ce = OGA1_XP10_BPROM_CE_BAR;
ogp_reg_sck = OGA1_XP10_BPROM_SCK;
} else if (!strcasecmp(type, "cprom") || !strcasecmp(type, "s3")) {
ogp_reg_sel = OGA1_XP10_CPROM_REG_SEL;
ogp_reg_siso = OGA1_XP10_CPROM_SI;
ogp_reg__ce = OGA1_XP10_CPROM_CE_BAR;
ogp_reg_sck = OGA1_XP10_CPROM_SCK;
} else {
msg_perr("Invalid or missing rom= parameter.\n");
free(type);
return 1;
}
free(type);
if (rget_io_perms())
return 1;
dev = pcidev_init(ogp_spi, PCI_BASE_ADDRESS_0);
if (!dev)
return 1;
uint32_t io_base_addr = pcidev_readbar(dev, PCI_BASE_ADDRESS_0);
if (!io_base_addr)
return 1;
ogp_spibar = rphysmap("OGP registers", io_base_addr, 4096);
if (ogp_spibar == ERROR_PTR)
return 1;
struct ogp_spi_data *data = calloc(1, sizeof(*data));
if (!data) {
msg_perr("Unable to allocate space for SPI master data\n");
return 1;
}
data->spibar = ogp_spibar;
data->reg_sel = ogp_reg_sel;
data->reg_siso = ogp_reg_siso;
data->reg__ce = ogp_reg__ce;
data->reg_sck = ogp_reg_sck;
if (register_shutdown(ogp_spi_shutdown, data)) {
free(data);
return 1;
}
if (register_spi_bitbang_master(&bitbang_spi_master_ogp, data))
return 1;
return 0;
}
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