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flashrom/nicintel_spi.c
Jacob Garber 8c3de01548 tree: Make internal variables static 
All these variables are only used in the files they are defined in, so
they can be made static.

(Backported as it untangles aliased global objects.)

Change-Id: I1e55138adef540e9d3a2237aa5b289cb338c0608
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/33747
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/62612
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
2022-03-07 16:44:36 +00:00

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/*
* This file is part of the flashrom project.
*
* Copyright (C) 2010 Carl-Daniel Hailfinger
* Copyright (C) 2010 Idwer Vollering
*
* 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.
*/
/*
* 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.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
#define BIT(x) (1<<(x))
static uint8_t *nicintel_spibar;
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)
{
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
tmp |= BIT(FL_REQ);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
/* Wait until we are allowed to use the SPI bus. */
while (!(pci_mmio_readl(nicintel_spibar + FLA) & BIT(FL_GNT))) ;
}
static void nicintel_release_spibus(void)
{
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
tmp &= ~BIT(FL_REQ);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
}
static void nicintel_bitbang_set_cs(int val)
{
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
tmp &= ~BIT(FL_CS);
tmp |= (val << FL_CS);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
}
static void nicintel_bitbang_set_sck(int val)
{
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
tmp &= ~BIT(FL_SCK);
tmp |= (val << FL_SCK);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
}
static void nicintel_bitbang_set_mosi(int val)
{
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
tmp &= ~BIT(FL_SI);
tmp |= (val << FL_SI);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
}
static int nicintel_bitbang_get_miso(void)
{
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
tmp = (tmp >> FL_SO) & 0x1;
return tmp;
}
static const struct bitbang_spi_master bitbang_spi_master_nicintel = {
.type = BITBANG_SPI_MASTER_NICINTEL,
.set_cs = nicintel_bitbang_set_cs,
.set_sck = nicintel_bitbang_set_sck,
.set_mosi = nicintel_bitbang_set_mosi,
.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 *data)
{
uint32_t tmp;
/* Disable writes manually. See the comment about EECD in nicintel_spi_init() for details. */
tmp = pci_mmio_readl(nicintel_spibar + EECD);
tmp &= ~FLASH_WRITES_ENABLED;
tmp |= FLASH_WRITES_DISABLED;
pci_mmio_writel(tmp, nicintel_spibar + EECD);
return 0;
}
static int nicintel_spi_82599_enable_flash(void)
{
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(nicintel_spibar + EECD);
tmp &= ~FLASH_WRITES_DISABLED;
tmp |= FLASH_WRITES_ENABLED;
pci_mmio_writel(tmp, nicintel_spibar + EECD);
/* test if FWE is really set to allow writes */
tmp = pci_mmio_readl(nicintel_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, NULL))
return 1;
return 0;
}
static int nicintel_spi_i210_enable_flash(void)
{
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
if (tmp & BIT(FL_LOCKED)) {
msg_perr("Flash is in Secure Mode. Abort.\n");
return 1;
}
if (!(tmp & BIT(FL_ABORT)))
return 0;
tmp |= BIT(FL_CLR_ERR);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
tmp = pci_mmio_readl(nicintel_spibar + FLA);
if (!(tmp & BIT(FL_ABORT))) {
msg_perr("Unable to clear Flash Access Error. Abort\n");
return 1;
}
return 0;
}
int nicintel_spi_init(void)
{
struct pci_dev *dev = NULL;
if (rget_io_perms())
return 1;
dev = pcidev_init(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;
if ((dev->device_id & 0xfff0) == 0x1530) {
nicintel_spibar = rphysmap("Intel I210 Gigabit w/ SPI flash", io_base_addr + 0x12000,
MEMMAP_SIZE);
if (!nicintel_spibar || nicintel_spi_i210_enable_flash())
return 1;
} else if (dev->device_id < 0x10d8) {
nicintel_spibar = rphysmap("Intel Gigabit NIC w/ SPI flash", io_base_addr,
MEMMAP_SIZE);
if (!nicintel_spibar || nicintel_spi_82599_enable_flash())
return 1;
} else {
nicintel_spibar = rphysmap("Intel 10 Gigabit NIC w/ SPI flash", io_base_addr + 0x10000,
MEMMAP_SIZE);
if (!nicintel_spibar || nicintel_spi_82599_enable_flash())
return 1;
}
if (register_spi_bitbang_master(&bitbang_spi_master_nicintel))
return 1;
return 0;
}
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