diff options
| -rw-r--r-- | src/mainboard/prodrive/atlas/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/mainboard/prodrive/atlas/bootblock.c | 6 | ||||
| -rw-r--r-- | src/mainboard/prodrive/atlas/devicetree.cb | 2 | ||||
| -rw-r--r-- | src/mainboard/prodrive/atlas/ec.c | 68 | ||||
| -rw-r--r-- | src/mainboard/prodrive/atlas/ec.h | 23 | ||||
| -rw-r--r-- | src/mainboard/prodrive/atlas/mainboard.h | 10 |
6 files changed, 111 insertions, 0 deletions
diff --git a/src/mainboard/prodrive/atlas/Makefile.inc b/src/mainboard/prodrive/atlas/Makefile.inc index 1446e54c25..3826c8f654 100644 --- a/src/mainboard/prodrive/atlas/Makefile.inc +++ b/src/mainboard/prodrive/atlas/Makefile.inc @@ -1,5 +1,7 @@ ## SPDX-License-Identifier: GPL-2.0-only +all-y += ec.c + bootblock-y += bootblock.c bootblock-y += early_gpio.c diff --git a/src/mainboard/prodrive/atlas/bootblock.c b/src/mainboard/prodrive/atlas/bootblock.c index 5b1643b742..07f3bb2bde 100644 --- a/src/mainboard/prodrive/atlas/bootblock.c +++ b/src/mainboard/prodrive/atlas/bootblock.c @@ -1,10 +1,16 @@ /* SPDX-License-Identifier: GPL-2.0-only */ #include <bootblock_common.h> +#include <types.h> +#include "ec.h" #include "gpio.h" +#include "mainboard.h" void bootblock_mainboard_early_init(void) { configure_early_gpio_pads(); + + /* Enable EMI (Embedded Memory Interface) 0 on the EC */ + ec_espi_io_program_iobase(EC_IDX_PORT, EMI_0_IOBASE_INDEX, EMI_0_IO_BASE_ADDR); } diff --git a/src/mainboard/prodrive/atlas/devicetree.cb b/src/mainboard/prodrive/atlas/devicetree.cb index e9c818106f..1c4af586a9 100644 --- a/src/mainboard/prodrive/atlas/devicetree.cb +++ b/src/mainboard/prodrive/atlas/devicetree.cb @@ -13,6 +13,8 @@ chip soc/intel/alderlake register "gen2_dec" = "0x000c0201" # EC memory map range is 0x900-0x9ff register "gen3_dec" = "0x00fc0901" + # EC EMI 0 range is 0xc00 - 0xc0f + register "gen4_dec" = "0x000c0c01" # SaGv Configuration register "sagv" = "CONFIG(ATLAS_ENABLE_SAGV) ? SaGv_Enabled : SaGv_Disabled" diff --git a/src/mainboard/prodrive/atlas/ec.c b/src/mainboard/prodrive/atlas/ec.c new file mode 100644 index 0000000000..cb022dbc88 --- /dev/null +++ b/src/mainboard/prodrive/atlas/ec.c @@ -0,0 +1,68 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#define __SIMPLE_DEVICE__ + +#include <arch/io.h> +#include <device/pnp.h> +#include <device/pnp_ops.h> +#include <types.h> + +#include "ec.h" + +/* 10.7.2 ENABLE CONFIG MODE */ +static void pnp_enter_conf_state(const pnp_devfn_t dev) +{ + const u16 port = dev >> 8; + outb(0x55, port); +} + +/* 10.7.3 DISABLE CONFIG MODE */ +static void pnp_exit_conf_state(const pnp_devfn_t dev) +{ + const u16 port = dev >> 8; + outb(0xaa, port); +} + +void ec_espi_io_program_iobase(const u16 port, const u8 iobase_index, const u16 base) +{ + const pnp_devfn_t dev = PNP_DEV(port, LDN_ESPI_IO_COMPONENT); + + pnp_enter_conf_state(dev); + pnp_set_logical_device(dev); + pnp_write_config(dev, iobase_index + 2, (base & 0x00ff) >> 0); /* Addr LSB */ + pnp_write_config(dev, iobase_index + 3, (base & 0xff00) >> 8); /* Addr MSB */ + pnp_write_config(dev, iobase_index + 0, base != 0x0000); /* Valid bit */ + pnp_exit_conf_state(dev); +} + +/* TABLE 14-5: RUNTIME REGISTER SUMMARY */ +#define HOST_EC_MBOX 0x00 +#define EC_HOST_MBOX 0x01 +#define EC_ADDRESS_LSB 0x02 +#define EC_ADDRESS_MSB 0x03 +#define EC_DATA_BYTE(n) (0x04 + (n) % sizeof(u32)) +#define INTERRUPT_SOURCE_LSB 0x08 +#define INTERRUPT_SOURCE_MSB 0x09 +#define INTERRUPT_MASK_LSB 0x0a +#define INTERRUPT_MASK_MSB 0x0b +#define APPLICATION_ID 0x0c + +/* 14.8.3 ACCESS TYPES */ +enum emi_access_type { + EMI_ACCESS_8_BIT = 0, + EMI_ACCESS_16_BIT = 1, + EMI_ACCESS_32_BIT = 2, + EMI_ACCESS_32_BIT_AUTO_INC = 3, +}; + +void ec_emi_read(u8 *dest, const u16 base, const u8 region, const u16 offset, const u16 length) +{ + const u16 addr = ((region & 1) << 15) | (offset & 0x7ffc) | EMI_ACCESS_32_BIT_AUTO_INC; + + outb((addr & 0x00ff) >> 0, base + EC_ADDRESS_LSB); + outb((addr & 0xff00) >> 8, base + EC_ADDRESS_MSB); + + /* EC_ADDRESS auto-increment happens when accessing EC_DATA_BYTE_3 */ + for (u16 i = 0; i < length; i++) + dest[i] = inb(base + EC_DATA_BYTE(offset + i)); +} diff --git a/src/mainboard/prodrive/atlas/ec.h b/src/mainboard/prodrive/atlas/ec.h new file mode 100644 index 0000000000..bad9904340 --- /dev/null +++ b/src/mainboard/prodrive/atlas/ec.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef MICROCHIP_MEC152X_EC_H +#define MICROCHIP_MEC152X_EC_H + +/* + * Used references: MEC152x datasheet (Microchip document DS00003427C) + */ + +#include <types.h> + +/* TABLE 3-1: BASE ADDRESS */ +#define LDN_ESPI_IO_COMPONENT 0xd + +/* TABLE 9-6: ESPI I/O BASE ADDRESS REGISTER DEFAULT VALUES */ +#define EMI_0_IOBASE_INDEX 0x68 +#define EMI_1_IOBASE_INDEX 0x6c + +void ec_espi_io_program_iobase(const u16 port, const u8 iobase_index, const u16 base); + +void ec_emi_read(u8 *dest, const u16 base, const u8 region, const u16 offset, const u16 length); + +#endif /* MICROCHIP_MEC152X_EC_H */ diff --git a/src/mainboard/prodrive/atlas/mainboard.h b/src/mainboard/prodrive/atlas/mainboard.h new file mode 100644 index 0000000000..a03cff4f47 --- /dev/null +++ b/src/mainboard/prodrive/atlas/mainboard.h @@ -0,0 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef ATLAS_MAINBOARD_H +#define ATLAS_MAINBOARD_H + +/* Embedded controller settings */ +#define EC_IDX_PORT 0x2e +#define EMI_0_IO_BASE_ADDR 0xc00 + +#endif /* ATLAS_MAINBOARD_H */ |