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flashrom/nicintel_spi.c
Ed Swierk 33180dfb39 Add support for Intel 82599 10 GbE NICs 
The Intel 82599 series of 10 GbE controllers has a bit-banged SPI
interface that's register-compatible with the one in the 1 GbE
controllers, except the register addresses are shifted up by
0x10000, cf. Intel document 331520:
http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/82599-10-gbe-controller-datasheet.pdf

This patch was tested with a board that has the 0x10fc device and a Micron
M25P40 SPI flash chip. The PCI IDs and names for the devices are per Intel document 331521
https://www-ssl.intel.com/content/dam/www/public/us/en/documents/specification-updates/82599-10-gbe-controller-spec-update.pdf
and the PCI SIG device ID registry with small refinements.

Corresponding to flashrom svn r1856.

Signed-off-by: Ed Swierk <eswierk@skyportsystems.com>
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
2014-12-05 22:56:13 +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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* 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
/* Currently unused */
// #define FL_BUSY 30
// #define FL_ER 31
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"},
{0},
};
static void nicintel_request_spibus(void)
{
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
tmp |= 1 << 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) & (1 << FL_GNT))) ;
}
static void nicintel_release_spibus(void)
{
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
tmp &= ~(1 << 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 &= ~(1 << 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 &= ~(1 << 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 &= ~(1 << 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;
}
int nicintel_spi_init(void)
{
struct pci_dev *dev = NULL;
uint32_t tmp;
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 < 0x10d8) {
nicintel_spibar = rphysmap("Intel Gigabit NIC w/ SPI flash", io_base_addr,
MEMMAP_SIZE);
} else {
nicintel_spibar = rphysmap("Intel 10 Gigabit NIC w/ SPI flash", io_base_addr + 0x10000,
MEMMAP_SIZE);
}
if (nicintel_spibar == ERROR_PTR)
return 1;
/* 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;
if (register_spi_bitbang_master(&bitbang_spi_master_nicintel))
return 1;
return 0;
}
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