Angel Pons | 182dbde | 2020-04-02 23:49:05 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 2 | |
Kyösti Mälkki | de64078 | 2019-12-03 07:30:26 +0200 | [diff] [blame] | 3 | #include <arch/bootblock.h> |
Kyösti Mälkki | f1b58b7 | 2019-03-01 13:43:02 +0200 | [diff] [blame] | 4 | #include <device/pci_ops.h> |
Angel Pons | c9ee2c0 | 2020-06-21 17:58:59 +0200 | [diff] [blame] | 5 | #include <southbridge/intel/common/early_spi.h> |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 6 | #include "pch.h" |
| 7 | |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 8 | static void enable_port80_on_lpc(void) |
| 9 | { |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 10 | /* Enable port 80 POST on LPC */ |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 11 | RCBA32(GCS) &= (~0x04); |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 12 | } |
| 13 | |
Duncan Laurie | 2a700ec | 2012-10-08 15:26:54 -0700 | [diff] [blame] | 14 | static void set_spi_speed(void) |
| 15 | { |
| 16 | u32 fdod; |
| 17 | u8 ssfc; |
| 18 | |
| 19 | /* Observe SPI Descriptor Component Section 0 */ |
| 20 | RCBA32(0x38b0) = 0x1000; |
| 21 | |
| 22 | /* Extract the Write/Erase SPI Frequency from descriptor */ |
| 23 | fdod = RCBA32(0x38b4); |
| 24 | fdod >>= 24; |
| 25 | fdod &= 7; |
| 26 | |
| 27 | /* Set Software Sequence frequency to match */ |
| 28 | ssfc = RCBA8(0x3893); |
| 29 | ssfc &= ~7; |
| 30 | ssfc |= fdod; |
| 31 | RCBA8(0x3893) = ssfc; |
| 32 | } |
| 33 | |
Arthur Heymans | 360d947 | 2019-11-12 18:11:03 +0100 | [diff] [blame] | 34 | void bootblock_early_southbridge_init(void) |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 35 | { |
Angel Pons | c9ee2c0 | 2020-06-21 17:58:59 +0200 | [diff] [blame] | 36 | enable_spi_prefetching_and_caching(); |
Arthur Heymans | 360d947 | 2019-11-12 18:11:03 +0100 | [diff] [blame] | 37 | |
| 38 | early_pch_init(); |
| 39 | |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 40 | enable_port80_on_lpc(); |
Duncan Laurie | 2a700ec | 2012-10-08 15:26:54 -0700 | [diff] [blame] | 41 | set_spi_speed(); |
Duncan Laurie | 8e515d3 | 2012-06-23 15:43:41 -0700 | [diff] [blame] | 42 | |
| 43 | /* Enable upper 128bytes of CMOS */ |
| 44 | RCBA32(RC) = (1 << 2); |
Stefan Reinauer | 8e07382 | 2012-04-04 00:07:22 +0200 | [diff] [blame] | 45 | } |