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nicintel_spi.c: Refactor singleton states into reentrant pattern

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Move global singleton states into a struct and store within
the bitbang_spi_master data field for the life-time of the driver.

This patch also drops `nicintel` prefix from spi master struct member.

This is one of the steps on the way to move spi_master data
memory management behind the initialisation API, for more
context see other patches under the same topic "register_master_api".

BUG=b:185191942
TEST=builds

Change-Id: I385d3ced19dfe6453ccc4128a7b792c2dce3a449
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/54995
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
This commit is contained in:
Anastasia Klimchuk 2021-05-27 08:23:24 +10:00 committed by Edward O'Callaghan
parent 4a7d259037
commit 0d149d9d5b
1 changed files with 79 additions and 49 deletions
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128
nicintel_spi.c
View File

@ -75,7 +75,9 @@
#define BIT(x) (1<<(x))
static uint8_t *nicintel_spibar;
struct nicintel_spi_data {
uint8_t *spibar;
};
const struct dev_entry nics_intel_spi[] = {
{PCI_VENDOR_ID_INTEL, 0x105e, OK, "Intel", "82571EB Gigabit Ethernet Controller"},
@ -109,60 +111,66 @@ const struct dev_entry nics_intel_spi[] = {
static void nicintel_request_spibus(void *spi_data)
{
struct nicintel_spi_data *data = spi_data;
uint32_t tmp;
tmp = pci_mmio_readl(nicintel_spibar + FLA);
tmp = pci_mmio_readl(data->spibar + FLA);
tmp |= BIT(FL_REQ);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
pci_mmio_writel(tmp, data->spibar + FLA);
/* Wait until we are allowed to use the SPI bus. */
while (!(pci_mmio_readl(nicintel_spibar + FLA) & BIT(FL_GNT))) ;
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(nicintel_spibar + FLA);
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_REQ);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
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(nicintel_spibar + FLA);
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_CS);
tmp |= (val << FL_CS);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
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(nicintel_spibar + FLA);
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_SCK);
tmp |= (val << FL_SCK);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
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(nicintel_spibar + FLA);
tmp = pci_mmio_readl(data->spibar + FLA);
tmp &= ~BIT(FL_SI);
tmp |= (val << FL_SI);
pci_mmio_writel(tmp, nicintel_spibar + FLA);
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(nicintel_spibar + FLA);
tmp = pci_mmio_readl(data->spibar + FLA);
tmp = (tmp >> FL_SO) & 0x1;
return tmp;
}
@ -177,20 +185,22 @@ static const struct bitbang_spi_master bitbang_spi_master_nicintel = {
.half_period = 1,
};
static int nicintel_spi_shutdown(void *data)
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(nicintel_spibar + EECD);
tmp = pci_mmio_readl(data->spibar + EECD);
tmp &= ~FLASH_WRITES_ENABLED;
tmp |= FLASH_WRITES_DISABLED;
pci_mmio_writel(tmp, nicintel_spibar + EECD);
pci_mmio_writel(tmp, data->spibar + EECD);
free(data);
return 0;
}
static int nicintel_spi_82599_enable_flash(void)
static int nicintel_spi_82599_enable_flash(struct nicintel_spi_data *data)
{
uint32_t tmp;
@ -199,45 +209,53 @@ static int nicintel_spi_82599_enable_flash(void)
* but other bits with side effects as well. Those other bits must be
* left untouched.
*/
tmp = pci_mmio_readl(nicintel_spibar + EECD);
tmp = pci_mmio_readl(data->spibar + EECD);
tmp &= ~FLASH_WRITES_DISABLED;
tmp |= FLASH_WRITES_ENABLED;
pci_mmio_writel(tmp, nicintel_spibar + EECD);
pci_mmio_writel(tmp, data->spibar + EECD);
/* test if FWE is really set to allow writes */
tmp = pci_mmio_readl(nicintel_spibar + EECD);
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, NULL))
if (register_shutdown(nicintel_spi_shutdown, data))
return 1;
return 0;
}
static int nicintel_spi_i210_enable_flash(void)
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(nicintel_spibar + FLA);
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)))
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;
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;
}
@ -256,25 +274,37 @@ int nicintel_spi_init(void)
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;
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 (register_spi_bitbang_master(&bitbang_spi_master_nicintel, NULL))
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;
}