mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-07 19:56:18 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2016 Google, Inc
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <errno.h>
|
|
#include <fdtdec.h>
|
|
#include <pch.h>
|
|
#include <pci.h>
|
|
#include <asm/intel_regs.h>
|
|
#include <asm/io.h>
|
|
#include <asm/lpc_common.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
/* Enable Prefetching and Caching */
|
|
static void enable_spi_prefetch(struct udevice *pch)
|
|
{
|
|
u8 reg8;
|
|
|
|
dm_pci_read_config8(pch, 0xdc, ®8);
|
|
reg8 &= ~(3 << 2);
|
|
reg8 |= (2 << 2); /* Prefetching and Caching Enabled */
|
|
dm_pci_write_config8(pch, 0xdc, reg8);
|
|
}
|
|
|
|
static void enable_port80_on_lpc(struct udevice *pch)
|
|
{
|
|
/* Enable port 80 POST on LPC */
|
|
dm_pci_write_config32(pch, PCH_RCBA_BASE, RCB_BASE_ADDRESS | 1);
|
|
clrbits_le32(RCB_REG(GCS), 4);
|
|
}
|
|
|
|
/**
|
|
* lpc_early_init() - set up LPC serial ports and other early things
|
|
*
|
|
* @dev: LPC device
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int lpc_common_early_init(struct udevice *dev)
|
|
{
|
|
struct udevice *pch = dev->parent;
|
|
struct reg_info {
|
|
u32 base;
|
|
u32 size;
|
|
} values[4], *ptr;
|
|
int count;
|
|
int i;
|
|
|
|
count = fdtdec_get_int_array_count(gd->fdt_blob, dev_of_offset(dev),
|
|
"intel,gen-dec", (u32 *)values,
|
|
sizeof(values) / sizeof(u32));
|
|
if (count < 0)
|
|
return -EINVAL;
|
|
|
|
/* Set COM1/COM2 decode range */
|
|
dm_pci_write_config16(pch, LPC_IO_DEC, 0x0010);
|
|
|
|
/* Enable PS/2 Keyboard/Mouse, EC areas and COM1 */
|
|
dm_pci_write_config16(pch, LPC_EN, KBC_LPC_EN | MC_LPC_EN |
|
|
GAMEL_LPC_EN | COMA_LPC_EN);
|
|
|
|
/* Write all registers but use 0 if we run out of data */
|
|
count = count * sizeof(u32) / sizeof(values[0]);
|
|
for (i = 0, ptr = values; i < ARRAY_SIZE(values); i++, ptr++) {
|
|
u32 reg = 0;
|
|
|
|
if (i < count)
|
|
reg = ptr->base | PCI_COMMAND_IO | (ptr->size << 16);
|
|
dm_pci_write_config32(pch, LPC_GENX_DEC(i), reg);
|
|
}
|
|
|
|
enable_spi_prefetch(pch);
|
|
|
|
/* This is already done in start.S, but let's do it in C */
|
|
enable_port80_on_lpc(pch);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int lpc_set_spi_protect(struct udevice *dev, int bios_ctrl, bool protect)
|
|
{
|
|
uint8_t bios_cntl;
|
|
|
|
/* Adjust the BIOS write protect and SMM BIOS Write Protect Disable */
|
|
dm_pci_read_config8(dev, bios_ctrl, &bios_cntl);
|
|
if (protect) {
|
|
bios_cntl &= ~BIOS_CTRL_BIOSWE;
|
|
bios_cntl |= BIT(5);
|
|
} else {
|
|
bios_cntl |= BIOS_CTRL_BIOSWE;
|
|
bios_cntl &= ~BIT(5);
|
|
}
|
|
dm_pci_write_config8(dev, bios_ctrl, bios_cntl);
|
|
|
|
return 0;
|
|
}
|