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flashrom/nicintel_spi.c
Anastasia Klimchuk 829c0e4e6a programmers: Use SPDX in headers 
Change-Id: Iaa222f9f265e019798aada4d556c484cb3b46b5d
Signed-off-by: Anastasia Klimchuk <aklm@flashrom.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/89522
Reviewed-by: Peter Marheine <pmarheine@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jean THOMAS <virgule@jeanthomas.me>
Reviewed-by: Miklós Márton <martonmiklosqdev@gmail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Antonio Vázquez Blanco <antoniovazquezblanco@gmail.com>
2025-10-18 07:10:08 +00:00

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/*
* This file is part of the flashrom project.
*
* SPDX-License-Identifier: GPL-2.0-only
* SPDX-FileCopyrightText: 2010 Carl-Daniel Hailfinger
* SPDX-FileCopyrightText: 2010 Idwer Vollering
*/
/*
* Datasheets:
* PCI/PCI-X Family of Gigabit Ethernet Controllers Software Developer's Manual
* 82540EP/EM, 82541xx, 82544GC/EI, 82545GM/EM, 82546GB/EB, and 82547xx
* http://www.intel.com/content/www/us/en/ethernet-controllers/pci-pci-x-family-gbe-controllers-software-dev-manual.html
*
* PCIe GbE Controllers Open Source Software Developer's Manual
* http://www.intel.com/content/www/us/en/ethernet-controllers/pcie-gbe-controllers-open-source-manual.html
*
* Intel 82574 Gigabit Ethernet Controller Family Datasheet
* http://www.intel.com/content/www/us/en/ethernet-controllers/82574l-gbe-controller-datasheet.html
*
* Intel 82599 10 GbE Controller Datasheet (331520)
* http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/82599-10-gbe-controller-datasheet.pdf
*/
#include <stdlib.h>
#include <unistd.h>
#include "flash.h"
#include "programmer.h"
#include "hwaccess_physmap.h"
#include "pcidev.h"
#define PCI_VENDOR_ID_INTEL 0x8086
#define MEMMAP_SIZE getpagesize()
/* EEPROM/Flash Control & Data Register */
#define EECD 0x10
/* Flash Access Register */
#define FLA 0x1c
/*
* Register bits of EECD.
* Table 13-6
*
* Bit 04, 05: FWE (Flash Write Enable Control)
* 00b = not allowed (on some cards this sends an erase command if bit 31 (FL_ER) of FLA is set)
* 01b = flash writes disabled
* 10b = flash writes enabled
* 11b = not allowed
*/
#define FLASH_WRITES_DISABLED 0x10 /* FWE: 10000b */
#define FLASH_WRITES_ENABLED 0x20 /* FWE: 100000b */
/* Flash Access register bits
* Table 13-9
*/
#define FL_SCK 0
#define FL_CS 1
#define FL_SI 2
#define FL_SO 3
#define FL_REQ 4
#define FL_GNT 5
#define FL_LOCKED 6
#define FL_ABORT 7
#define FL_CLR_ERR 8
/* Currently unused */
// #define FL_BUSY 30
// #define FL_ER 31
struct nicintel_spi_data {
uint8_t *spibar;
};
static const struct dev_entry nics_intel_spi[] = {
{PCI_VENDOR_ID_INTEL, 0x105e, OK, "Intel", "82571EB Gigabit Ethernet Controller"},
{PCI_VENDOR_ID_INTEL, 0x1076, OK, "Intel", "82541GI Gigabit Ethernet Controller"},
{PCI_VENDOR_ID_INTEL, 0x107c, OK, "Intel", "82541PI Gigabit Ethernet Controller"},
{PCI_VENDOR_ID_INTEL, 0x10b9, OK, "Intel", "82572EI Gigabit Ethernet Controller"},
{PCI_VENDOR_ID_INTEL, 0x10d3, OK, "Intel", "82574L Gigabit Ethernet Controller"},
{PCI_VENDOR_ID_INTEL, 0x10d8, NT, "Intel", "82599 10 Gigabit Unprogrammed Network Controller"},
{PCI_VENDOR_ID_INTEL, 0x10f7, NT, "Intel", "82599 10 Gigabit KX4 Dual Port Network Controller"},
{PCI_VENDOR_ID_INTEL, 0x10f8, NT, "Intel", "82599 10 Gigabit Dual Port Backplane Controller"},
{PCI_VENDOR_ID_INTEL, 0x10f9, NT, "Intel", "82599 10 Gigabit CX4 Dual Port Network Controller"},
{PCI_VENDOR_ID_INTEL, 0x10fb, NT, "Intel", "82599 10-Gigabit SFI/SFP+ Network Controller"},
{PCI_VENDOR_ID_INTEL, 0x10fc, OK, "Intel", "82599 10 Gigabit XAUI/BX4 Dual Port Network Controller"},
{PCI_VENDOR_ID_INTEL, 0x1517, NT, "Intel", "82599 10 Gigabit KR Network Controller"},
{PCI_VENDOR_ID_INTEL, 0x151c, NT, "Intel", "82599 10 Gigabit TN Network Controller"},
{PCI_VENDOR_ID_INTEL, 0x1529, NT, "Intel", "82599 10 Gigabit Dual Port Network Controller with FCoE"},
{PCI_VENDOR_ID_INTEL, 0x152a, NT, "Intel", "82599 10 Gigabit Dual Port Backplane Controller with FCoE"},
{PCI_VENDOR_ID_INTEL, 0x1557, NT, "Intel", "82599 10 Gigabit SFI Network Controller"},
{PCI_VENDOR_ID_INTEL, 0x1531, OK, "Intel", "I210 Gigabit Network Connection Unprogrammed"},
{PCI_VENDOR_ID_INTEL, 0x1532, NT, "Intel", "I211 Gigabit Network Connection Unprogrammed"},
{PCI_VENDOR_ID_INTEL, 0x1533, NT, "Intel", "I210 Gigabit Network Connection"},
{PCI_VENDOR_ID_INTEL, 0x1536, NT, "Intel", "I210 Gigabit Network Connection SERDES Fiber"},
{PCI_VENDOR_ID_INTEL, 0x1537, NT, "Intel", "I210 Gigabit Network Connection SERDES Backplane"},
{PCI_VENDOR_ID_INTEL, 0x1538, NT, "Intel", "I210 Gigabit Network Connection SGMII"},
{PCI_VENDOR_ID_INTEL, 0x1539, NT, "Intel", "I211 Gigabit Network Connection"},
{0},
};
static void nicintel_request_spibus(void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + FLA);
tmp |= BIT(FL_REQ);
pci_mmio_writel(tmp, data->spibar + FLA);
/* Wait until we are allowed to use the SPI bus. */
while (!(pci_mmio_readl(data->spibar + FLA) & BIT(FL_GNT))) ;
}
static void nicintel_release_spibus(void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_REQ);
pci_mmio_writel(tmp, data->spibar + FLA);
}
static void nicintel_bitbang_set_cs(int val, void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_CS);
tmp |= (val << FL_CS);
pci_mmio_writel(tmp, data->spibar + FLA);
}
static void nicintel_bitbang_set_sck(int val, void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_SCK);
tmp |= (val << FL_SCK);
pci_mmio_writel(tmp, data->spibar + FLA);
}
static void nicintel_bitbang_set_mosi(int val, void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_SI);
tmp |= (val << FL_SI);
pci_mmio_writel(tmp, data->spibar + FLA);
}
static void nicintel_bitbang_set_sck_set_mosi(int sck, int mosi, void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_SCK);
tmp &= ~BIT(FL_SI);
tmp |= (sck << FL_SCK);
tmp |= (mosi << FL_SI);
pci_mmio_writel(tmp, data->spibar + FLA);
}
static int nicintel_bitbang_get_miso(void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + FLA);
tmp = (tmp >> FL_SO) & 0x1;
return tmp;
}
static int nicintel_bitbang_set_sck_get_miso(int sck, void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_SCK);
tmp |= (sck << FL_SCK);
pci_mmio_writel(tmp, data->spibar + FLA);
return (tmp >> FL_SO) & 0x1;
}
static const struct bitbang_spi_master bitbang_spi_master_nicintel = {
.set_cs = nicintel_bitbang_set_cs,
.set_sck = nicintel_bitbang_set_sck,
.set_mosi = nicintel_bitbang_set_mosi,
.set_sck_set_mosi = nicintel_bitbang_set_sck_set_mosi,
.set_sck_get_miso = nicintel_bitbang_set_sck_get_miso,
.get_miso = nicintel_bitbang_get_miso,
.request_bus = nicintel_request_spibus,
.release_bus = nicintel_release_spibus,
.half_period = 1,
};
static int nicintel_spi_shutdown(void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
/* Disable writes manually. See the comment about EECD in nicintel_spi_init() for details. */
tmp = pci_mmio_readl(data->spibar + EECD);
tmp &= ~FLASH_WRITES_ENABLED;
tmp |= FLASH_WRITES_DISABLED;
pci_mmio_writel(tmp, data->spibar + EECD);
free(data);
return 0;
}
static int nicintel_spi_82599_enable_flash(struct nicintel_spi_data *data)
{
uint32_t tmp;
/* Automatic restore of EECD on shutdown is not possible because EECD
* does not only contain FLASH_WRITES_DISABLED|FLASH_WRITES_ENABLED,
* but other bits with side effects as well. Those other bits must be
* left untouched.
*/
tmp = pci_mmio_readl(data->spibar + EECD);
tmp &= ~FLASH_WRITES_DISABLED;
tmp |= FLASH_WRITES_ENABLED;
pci_mmio_writel(tmp, data->spibar + EECD);
/* test if FWE is really set to allow writes */
tmp = pci_mmio_readl(data->spibar + EECD);
if ( (tmp & FLASH_WRITES_DISABLED) || !(tmp & FLASH_WRITES_ENABLED) ) {
msg_perr("Enabling flash write access failed.\n");
return 1;
}
if (register_shutdown(nicintel_spi_shutdown, data))
return 1;
return 0;
}
static int nicintel_spi_i210_shutdown(void *data)
{
free(data);
return 0;
}
static int nicintel_spi_i210_enable_flash(struct nicintel_spi_data *data)
{
uint32_t tmp;
tmp = pci_mmio_readl(data->spibar + FLA);
if (tmp & BIT(FL_LOCKED)) {
msg_perr("Flash is in Secure Mode. Abort.\n");
return 1;
}
if (tmp & BIT(FL_ABORT)) {
tmp |= BIT(FL_CLR_ERR);
pci_mmio_writel(tmp, data->spibar + FLA);
tmp = pci_mmio_readl(data->spibar + FLA);
if (!(tmp & BIT(FL_ABORT))) {
msg_perr("Unable to clear Flash Access Error. Abort\n");
return 1;
}
}
if (register_shutdown(nicintel_spi_i210_shutdown, data))
return 1;
return 0;
}
static int nicintel_spi_init(const struct programmer_cfg *cfg)
{
struct pci_dev *dev = NULL;
dev = pcidev_init(cfg, nics_intel_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;
struct nicintel_spi_data *data = calloc(1, sizeof(*data));
if (!data) {
msg_perr("Unable to allocate space for SPI master data\n");
return 1;
}
if ((dev->device_id & 0xfff0) == 0x1530) {
data->spibar = rphysmap("Intel I210 Gigabit w/ SPI flash", io_base_addr + 0x12000,
MEMMAP_SIZE);
if (!data->spibar || nicintel_spi_i210_enable_flash(data)) {
free(data);
return 1;
}
} else if (dev->device_id < 0x10d8) {
data->spibar = rphysmap("Intel Gigabit NIC w/ SPI flash", io_base_addr,
MEMMAP_SIZE);
if (!data->spibar || nicintel_spi_82599_enable_flash(data)) {
free(data);
return 1;
}
} else {
data->spibar = rphysmap("Intel 10 Gigabit NIC w/ SPI flash", io_base_addr + 0x10000,
MEMMAP_SIZE);
if (!data->spibar || nicintel_spi_82599_enable_flash(data)) {
free(data);
return 1;
}
}
if (register_spi_bitbang_master(&bitbang_spi_master_nicintel, data))
return 1; /* shutdown function does cleanup */
return 0;
}
const struct programmer_entry programmer_nicintel_spi = {
.name = "nicintel_spi",
.type = PCI,
.devs.dev = nics_intel_spi,
.init = nicintel_spi_init,
};
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