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authorJack Rosenthal <jrosenth@chromium.org>2021-11-04 12:11:58 -0600
committerCommit Bot <commit-bot@chromium.org>2021-11-05 04:22:34 +0000
commit252457d4b21f46889eebad61d4c0a65331919cec (patch)
tree01856c4d31d710b20e85a74c8d7b5836e35c3b98 /chip/mchp/espi.c
parent08f5a1e6fc2c9467230444ac9b582dcf4d9f0068 (diff)
downloadchrome-ec-stabilize-voshyr-14637.B-ish.tar.gz
In the interest of making long-term branch maintenance incur as little technical debt on us as possible, we should not maintain any files on the branch we are not actually using. This has the added effect of making it extremely clear when merging CLs from the main branch when changes have the possibility to affect us. The follow-on CL adds a convenience script to actually pull updates from the main branch and generate a CL for the update. BUG=b:204206272 BRANCH=ish TEST=make BOARD=arcada_ish && make BOARD=drallion_ish Signed-off-by: Jack Rosenthal <jrosenth@chromium.org> Change-Id: I17e4694c38219b5a0823e0a3e55a28d1348f4b18 Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3262038 Reviewed-by: Jett Rink <jettrink@chromium.org> Reviewed-by: Tom Hughes <tomhughes@chromium.org>
Diffstat (limited to 'chip/mchp/espi.c')
-rw-r--r--chip/mchp/espi.c1505
1 files changed, 0 insertions, 1505 deletions
diff --git a/chip/mchp/espi.c b/chip/mchp/espi.c
deleted file mode 100644
index 8a38a82688..0000000000
--- a/chip/mchp/espi.c
+++ /dev/null
@@ -1,1505 +0,0 @@
-/* Copyright 2017 The Chromium OS Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/* ESPI module for Chrome EC */
-
-#include "common.h"
-#include "acpi.h"
-#include "console.h"
-#include "gpio.h"
-#include "hooks.h"
-#include "host_command.h"
-#include "keyboard_protocol.h"
-#include "port80.h"
-#include "util.h"
-#include "chipset.h"
-
-#include "registers.h"
-#include "espi.h"
-#include "lpc.h"
-#include "lpc_chip.h"
-#include "system.h"
-#include "task.h"
-#include "console.h"
-#include "uart.h"
-#include "util.h"
-#include "power.h"
-#include "timer.h"
-#include "tfdp_chip.h"
-
-/* Console output macros */
-#ifdef CONFIG_MCHP_ESPI_DEBUG
-#ifdef CONFIG_MCHP_TFDP
-#define CPUTS(...)
-#define CPRINTS(...)
-#else
-#define CPUTS(outstr) cputs(CC_LPC, outstr)
-#define CPRINTS(format, args...) cprints(CC_LPC, format, ## args)
-#endif
-#else
-#define CPUTS(...)
-#define CPRINTS(...)
-#endif
-
-/* Default config to use maximum frequency */
-#ifndef CONFIG_HOSTCMD_ESPI_EC_MAX_FREQ
-#if defined(CHIP_FAMILY_MEC172X)
-#define CONFIG_HOSTCMD_ESPI_EC_MAX_FREQ MCHP_ESPI_CAP1_MAX_FREQ_66M
-#else
-#define CONFIG_HOSTCMD_ESPI_EC_MAX_FREQ MCHP_ESPI_CAP1_MAX_FREQ_50M
-#endif
-#endif
-
-/* Default config to support all modes */
-#ifndef CONFIG_HOSTCMD_ESPI_EC_MODE
-#define CONFIG_HOSTCMD_ESPI_EC_MODE MCHP_ESPI_CAP1_ALL_MODE
-#endif
-
-/* Default config to support all channels */
-#ifndef CONFIG_HOSTCMD_ESPI_EC_CHAN_BITMAP
-#define CONFIG_HOSTCMD_ESPI_EC_CHAN_BITMAP MCHP_ESPI_CAP0_ALL_CHAN_SUPP
-#endif
-/*
- * eSPI slave to master virtual wire pulse timeout.
- */
-#define ESPI_S2M_VW_PULSE_LOOP_CNT 50
-#define ESPI_S2M_VW_PULSE_LOOP_DLY_US 10
-
-/*
- * eSPI master enable virtual wire channel timeout.
- */
-#define ESPI_CHAN_READY_TIMEOUT_US (100 * MSEC)
-#define ESPI_CHAN_READY_POLL_INTERVAL_US 100
-
-static uint32_t espi_channels_ready;
-
-/*
- * eSPI Virtual Wire reset values
- * VWire name used by chip independent code.
- * Host eSPI Master VWire index containing signal
- * Reset value of VWire. Note, each Host VWire index may
- * have a different reset source:
- * EC Power-on/chip reset
- * ESPI_RESET# assertion by Host eSPI master
- * eSPI Platform Reset assertion by Host eSPI master
- * MEC1701H allows eSPI Platform reset to
- * be a VWire or side band signal.
- *
- * NOTE MEC1701H Boot-ROM will restore VWires ... from
- * VBAT power register MCHP_VBAT_VWIRE_BACKUP.
- * bits[3:0] = Master-to-Slave Index 02h SRC3:SRC0 values
- * MSVW00 register
- * SRC0 = SLP_S3#
- * SRC1 = SLP_S4#
- * SRC2 = SLP_S5#
- * SRC3 = reserved
- * bits[7:4] = Master-to-Slave Index 42h SRC3:SRC0 values
- * MSVW04 register
- * SRC0 = SLP_LAN#
- * SRC1 = SLP_WLAN#
- * SRC2 = reserved
- * SRC3 = reserved
- *
- */
-struct vw_info_t {
- uint16_t name; /* signal name */
- uint8_t host_idx; /* Host VWire index of signal */
- uint8_t reset_val; /* reset value of VWire */
- uint8_t flags; /* b[0]=0(MSVW), =1(SMVW) */
- uint8_t reg_idx; /* MSVW or SMVW index */
- uint8_t src_num; /* SRC number */
- uint8_t rsvd;
-};
-
-
-/* VW signals used in eSPI */
-/*
- * MEC1701H VWire mapping based on eSPI Spec 1.0,
- * eSPI Compatibility spec 0.96,
- * MCHP HW defaults and ec/include/espi.h
- *
- * MSVW00 index=02h PORValue=00000000_04040404_00000102 reset=RESET_SYS
- * SRC0 = VW_SLP_S3_L, IntrDis
- * SRC1 = VW_SLP_S4_L, IntrDis
- * SRC2 = VW_SLP_S5_L, IntrDis
- * SRC3 = reserved, IntrDis
- * MSVW01 index=03h PORValue=00000000_04040404_00000003 reset=RESET_ESPI
- * SRC0 = VW_SUS_STAT_L, IntrDis
- * SRC1 = VW_PLTRST_L, IntrDis
- * SRC2 = VW_OOB_RST_WARN, IntrDis
- * SRC3 = reserved, IntrDis
- * MSVW02 index=07h PORValue=00000000_04040404_00000307 reset=PLTRST
- * SRC0 = VW_HOST_RST_WARN
- * SRC1 = 0 reserved
- * SRC2 = 0 reserved
- * SRC3 = 0 reserved
- * MSVW03 index=41h PORValue=00000000_04040404_00000041 reset=RESET_ESPI
- * SRC0 = VW_SUS_WARN_L, IntrDis
- * SRC1 = VW_SUS_PWRDN_ACK_L, IntrDis
- * SRC2 = 0 reserved, IntrDis
- * SRC3 = VW_SLP_A_L, IntrDis
- * MSVW04 index=42h PORValue=00000000_04040404_00000141 reset=RESET_SYS
- * SRC0 = VW_SLP_LAN, IntrDis
- * SRC1 = VW_SLP_WLAN, IntrDis
- * SRC2 = reserved, IntrDis
- * SRC3 = reserved, IntrDis
- *
- * SMVW00 index=04h PORValue=01010000_0000C004 STOM=1100 reset=RESET_ESPI
- * SRC0 = VW_OOB_RST_ACK
- * SRC1 = 0 reserved
- * SRC2 = VW_WAKE_L
- * SRC3 = VW_PME_L
- * SMVW01 index=05h PORValue=00000000_00000005 STOM=0000 reset=RESET_ESPI
- * SRC0 = SLAVE_BOOT_LOAD_DONE !!! NOTE: Google combines SRC0 & SRC3
- * SRC1 = VW_ERROR_FATAL
- * SRC2 = VW_ERROR_NON_FATAL
- * SRC3 = SLAVE_BOOT_LOAD_STATUS !!! into VW_PERIPHERAL_BTLD_STATUS_DONE
- * SMVW02 index=06h PORValue=00010101_00007306 STOM=0111 reset=PLTRST
- * SRC0 = VW_SCI_L
- * SRC1 = VW_SMI_L
- * SRC2 = VW_RCIN_L
- * SRC3 = VW_HOST_RST_ACK
- * SMVW03 index=40h PORValue=00000000_00000040 STOM=0000 reset=RESET_ESPI
- * SRC0 = assign VW_SUS_ACK
- * SRC1 = 0
- * SRC2 = 0
- * SRC3 = 0
- *
- * table of vwire structures
- * MSVW00 at 0x400F9C00 offset = 0x000
- * MSVW01 at 0x400F9C0C offset = 0x00C
- *
- * SMVW00 at 0x400F9E00 offset = 0x200
- * SMVW01 at 0x400F9E08 offset = 0x208
- *
- */
-
-/*
- * Virtual Wire table
- * Each entry contains:
- * Signal name from include/espi.h
- * Host chipset VWire index number
- * Reset value of VWire
- * flags where bit[0]==0 Wire is Master-to-Slave or 1 Slave-to-Master
- * MEC1701 register index into MSVW or SMVW register banks
- * MEC1701 source number in MSVW or SMVW bank
- * Reserved
- * Pointer to name string for debug
- */
-static const struct vw_info_t vw_info_tbl[] = {
- /* name host reset reg SRC
- * index value flags index num rsvd
- */
- /* MSVW00 Host index 02h (In) */
- {VW_SLP_S3_L, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00},
- {VW_SLP_S4_L, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00},
- {VW_SLP_S5_L, 0x02, 0x00, 0x10, 0x00, 0x02, 0x00},
- /* MSVW01 Host index 03h (In) */
- {VW_SUS_STAT_L, 0x03, 0x00, 0x10, 0x01, 0x00, 0x00},
- {VW_PLTRST_L, 0x03, 0x00, 0x10, 0x01, 0x01, 0x00},
- {VW_OOB_RST_WARN, 0x03, 0x00, 0x10, 0x01, 0x02, 0x00},
- /* SMVW00 Host Index 04h (Out) */
- {VW_OOB_RST_ACK, 0x04, 0x00, 0x01, 0x00, 0x00, 0x00},
- {VW_WAKE_L, 0x04, 0x01, 0x01, 0x00, 0x02, 0x00},
- {VW_PME_L, 0x04, 0x01, 0x01, 0x00, 0x03, 0x00},
- /* SMVW01 Host index 05h (Out) */
- {VW_ERROR_FATAL, 0x05, 0x00, 0x01, 0x01, 0x01, 0x00},
- {VW_ERROR_NON_FATAL, 0x05, 0x00, 0x01, 0x01, 0x02, 0x00},
- {VW_PERIPHERAL_BTLD_STATUS_DONE, 0x05, 0x00, 0x01, 0x01, 0x30, 0x00},
- /* SMVW02 Host index 06h (Out) */
- {VW_SCI_L, 0x06, 0x01, 0x01, 0x02, 0x00, 0x00},
- {VW_SMI_L, 0x06, 0x01, 0x01, 0x02, 0x01, 0x00},
- {VW_RCIN_L, 0x06, 0x01, 0x01, 0x02, 0x02, 0x00},
- {VW_HOST_RST_ACK, 0x06, 0x00, 0x01, 0x02, 0x03, 0x00},
- /* MSVW02 Host index 07h (In) */
- {VW_HOST_RST_WARN, 0x07, 0x00, 0x10, 0x02, 0x00, 0x00},
- /* SMVW03 Host Index 40h (Out) */
- {VW_SUS_ACK, 0x40, 0x00, 0x01, 0x03, 0x00, 0x00},
- /* MSVW03 Host Index 41h (In) */
- {VW_SUS_WARN_L, 0x41, 0x00, 0x10, 0x03, 0x00, 0x00},
- {VW_SUS_PWRDN_ACK_L, 0x41, 0x00, 0x10, 0x03, 0x01, 0x00},
- {VW_SLP_A_L, 0x41, 0x00, 0x10, 0x03, 0x03, 0x00},
- /* MSVW04 Host index 42h (In) */
- {VW_SLP_LAN, 0x42, 0x00, 0x10, 0x04, 0x00, 0x00},
- {VW_SLP_WLAN, 0x42, 0x00, 0x10, 0x04, 0x01, 0x00}
-};
-BUILD_ASSERT(ARRAY_SIZE(vw_info_tbl) == VW_SIGNAL_COUNT);
-
-
-/************************************************************************/
-/* eSPI internal utilities */
-
-static int espi_vw_get_signal_index(enum espi_vw_signal event)
-{
- int i;
-
- /* Search table by signal name */
- for (i = 0; i < ARRAY_SIZE(vw_info_tbl); i++) {
- if (vw_info_tbl[i].name == event)
- return i;
- }
-
- return -1;
-}
-
-
-/*
- * Initialize eSPI hardware upon ESPI_RESET# de-assertion
- */
-#ifdef CONFIG_MCHP_ESPI_RESET_DEASSERT_INIT
-static void espi_reset_deassert_init(void)
-{
-
-}
-#endif
-
-/* Call this on entry to deepest sleep state with EC turned off.
- * May not be required in future host eSPI chipsets.
- *
- * Save Master-to-Slave VWire Index 02h & 42h before
- * entering a deep sleep state where EC power is shut off.
- * PCH requires we restore these VWires on wake.
- * SLP_S3#, SLP_S4#, SLP_S5# in index 02h
- * SLP_LAN#, SLP_WLAN# in index 42h
- * Current VWire states are saved to a battery backed 8-bit
- * register in MEC1701H.
- * If a VBAT POR occurs the value of this register = 0 which
- * is the default state of the above VWires on a hardware
- * POR.
- * VBAT byte bit definitions
- * Host Index 02h -> MSVW00
- * Host Index 42h -> MSVW04
- * 0 Host Index 02h SRC0
- * 1 Host Index 02h SRC1
- * 2 Host Index 02h SRC2
- * 3 Host Index 02h SRC3
- * 4 Host Index 42h SRC0
- * 5 Host Index 42h SRC1
- * 6 Host Index 42h SRC2
- * 7 Host Index 42h SRC3
- */
-#ifdef CONFIG_MCHP_ESPI_VW_SAVE_ON_SLEEP
-static void espi_vw_save(void)
-{
- uint32_t i, r;
- uint8_t vb;
-
- vb = 0;
- r = MCHP_ESPI_VW_M2S_SRC_ALL(MSVW_H42);
- for (i = 0; i < 4; i++) {
- if (r & (1ul << (i << 3)))
- vb |= (1u << i);
- }
-
- vb <<= 4;
- r = MCHP_ESPI_VW_M2S_SRC_ALL(MSVW_H02);
- for (i = 0; i < 4; i++) {
- if (r & (1ul << (i << 3)))
- vb |= (1u << i);
- }
-
- r = MCHP_VBAT_RAM(MCHP_VBAT_VWIRE_BACKUP);
- r = (r & 0xFFFFFF00) | vb;
- MCHP_VBAT_RAM(MCHP_VBAT_VWIRE_BACKUP) = r;
-}
-
-/*
- * Update MEC1701H VBAT powered VWire backup values restored on
- * MCHP chip reset. MCHP Boot-ROM loads these values into
- * MSVW00 SRC[0:3](Index 02h) and MSVW04 SRC[0:3](Index 42h)
- * on chip reset(POR, WDT reset, chip reset, wake from EC off).
- * Always clear backup value after restore.
- */
-static void espi_vw_restore(void)
-{
- uint32_t i, r;
- uint8_t vb;
-
-#ifdef EVB_NO_ESPI_TEST_MODE
- vb = 0xff; /* force SLP_Sx# signals to 1 */
-#else
- vb = MCHP_VBAT_RAM(MCHP_VBAT_VWIRE_BACKUP) & 0xff;
-#endif
- r = 0;
- for (i = 0; i < 4; i++) {
- if (vb & (1u << i))
- r |= (1ul << (i << 3));
- }
- MCHP_ESPI_VW_M2S_SRC_ALL(MSVW_H02) = r;
- CPRINTS("eSPI restore MSVW00(Index 02h) = 0x%08x", r);
-
- vb >>= 4;
- r = 0;
- for (i = 0; i < 4; i++) {
- if (vb & (1u << i))
- r |= (1ul << (i << 3));
- }
- MCHP_ESPI_VW_M2S_SRC_ALL(MSVW_H42) = r;
- CPRINTS("eSPI restore MSVW00(Index 42h) = 0x%08x", r);
-
- r = MCHP_VBAT_RAM(MCHP_VBAT_VWIRE_BACKUP);
- MCHP_VBAT_RAM(MCHP_VBAT_VWIRE_BACKUP) = r & 0xFFFFFF00;
-
-}
-#endif
-
-static uint8_t __attribute__((unused)) espi_msvw_srcs_get(uint8_t msvw_id)
-{
- uint8_t msvw;
-
- msvw = 0;
- if (msvw_id < MSVW_MAX) {
- uint32_t r = MCHP_ESPI_VW_M2S_SRC_ALL(msvw_id);
-
- msvw = (r & 0x01);
- msvw |= ((r >> 7) & 0x02);
- msvw |= ((r >> 14) & 0x04);
- msvw |= ((r >> 21) & 0x08);
- }
-
- return msvw;
-}
-
-static void __attribute__((unused)) espi_msvw_srcs_set(uint8_t msvw_id,
- uint8_t src_bitmap)
-{
- if (msvw_id < MSVW_MAX) {
- uint32_t r = (src_bitmap & 0x08) << 21;
-
- r |= (src_bitmap & 0x04) << 14;
- r |= (src_bitmap & 0x02) << 7;
- r |= (src_bitmap & 0x01);
- MCHP_ESPI_VW_M2S_SRC_ALL(msvw_id) = r;
- }
-}
-
-static uint8_t __attribute__((unused)) espi_smvw_srcs_get(uint8_t smvw_id)
-{
- uint8_t smvw;
-
- smvw = 0;
- if (smvw_id < SMVW_MAX) {
- uint32_t r = MCHP_ESPI_VW_S2M_SRC_ALL(smvw_id);
-
- smvw = (r & 0x01);
- smvw |= ((r >> 7) & 0x02);
- smvw |= ((r >> 14) & 0x04);
- smvw |= ((r >> 21) & 0x08);
- }
-
- return smvw;
-}
-
-static void __attribute__((unused)) espi_smvw_srcs_set(uint8_t smvw_id,
- uint8_t src_bitmap)
-{
- if (smvw_id < SMVW_MAX) {
- uint32_t r = (src_bitmap & 0x08) << 21;
-
- r |= (src_bitmap & 0x04) << 14;
- r |= (src_bitmap & 0x02) << 7;
- r |= (src_bitmap & 0x01);
- MCHP_ESPI_VW_S2M_SRC_ALL(smvw_id) = r;
- }
-}
-
-
-/*
- * Called before releasing RSMRST#
- * ESPI_RESET# is asserted
- * PLATFORM_RESET# is asserted
- */
-static void espi_bar_pre_init(void)
-{
- /* Configuration IO BAR set to 0x2E/0x2F */
- MCHP_ESPI_IO_BAR_ADDR_LSB(MCHP_ESPI_IO_BAR_ID_CFG_PORT) = 0x2E;
- MCHP_ESPI_IO_BAR_ADDR_MSB(MCHP_ESPI_IO_BAR_ID_CFG_PORT) = 0x00;
- MCHP_ESPI_IO_BAR_VALID(MCHP_ESPI_IO_BAR_ID_CFG_PORT) = 1;
-}
-
-/*
- * Called before releasing RSMRST#
- * ESPI_RESET# is asserted
- * PLATFORM_RESET# is asserted
- * Set all MSVW to either edge interrupt
- * IRQ_SELECT fields are reset on RESET_SYS not ESPI_RESET or PLTRST
- *
- */
-static void espi_vw_pre_init(void)
-{
- uint32_t i;
-
- CPRINTS("eSPI VW Pre-Init");
-
-#ifdef CONFIG_MCHP_ESPI_VW_SAVE_ON_SLEEP
- espi_vw_restore();
-#endif
-
- /* disable all */
- for (i = 0; i < MSVW_MAX; i++)
- MCHP_ESPI_VW_M2S_IRQSEL_ALL(i) = 0x0f0f0f0ful;
-
- /* clear spurious status */
- MCHP_INT_SOURCE(24) = 0xfffffffful;
- MCHP_INT_SOURCE(25) = 0xfffffffful;
-
- MCHP_ESPI_VW_M2S_IRQSEL_ALL(MSVW_H02) = 0x040f0f0ful;
- MCHP_ESPI_VW_M2S_IRQSEL_ALL(MSVW_H03) = 0x040f0f0ful;
- MCHP_ESPI_VW_M2S_IRQSEL_ALL(MSVW_H07) = 0x0404040ful;
- MCHP_ESPI_VW_M2S_IRQSEL_ALL(MSVW_H41) = 0x0f040f0ful;
- MCHP_ESPI_VW_M2S_IRQSEL_ALL(MSVW_H42) = 0x04040f0ful;
- MCHP_ESPI_VW_M2S_IRQSEL_ALL(MSVW_H47) = 0x0404040ful;
-
- MCHP_INT_ENABLE(24) = 0xfff3b177ul;
- MCHP_INT_ENABLE(25) = 0x01ul;
-
- MCHP_INT_SOURCE(24) = 0xfffffffful;
- MCHP_INT_SOURCE(25) = 0xfffffffful;
-
- MCHP_INT_BLK_EN = (1ul << 24) + (1ul << 25);
-
- task_enable_irq(MCHP_IRQ_GIRQ24);
- task_enable_irq(MCHP_IRQ_GIRQ25);
-
- CPRINTS("eSPI VW Pre-Init Done");
-}
-
-
-/*
- * If VWire, Flash, and OOB channels have been enabled
- * then set VWires SLAVE_BOOT_LOAD_STATUS = SLAVE_BOOT_LOAD_DONE = 1
- * SLAVE_BOOT_LOAD_STATUS = SRC3 of Slave-to-Master Index 05h
- * SLAVE_BOOT_LOAD_DONE = SRC0 of Slave-to-Master Index 05h
- * Note, if set individually then set status first then done.
- * We set both simultaneously. ESPI_ALERT# will assert only if one
- * or both bits change.
- * SRC0 is bit[32] of SMVW01
- * SRC3 is bit[56] of SMVW01
- */
-static void espi_send_boot_load_done(void)
-{
- /* First set SLAVE_BOOT_LOAD_STATUS = 1 */
- MCHP_ESPI_VW_S2M_SRC3(SMVW_H05) = 1;
- /* Next set SLAVE_BOOT_LOAD_DONE = 1 */
- MCHP_ESPI_VW_S2M_SRC0(SMVW_H05) = 1;
-
- CPRINTS("eSPI Send SLAVE_BOOT_LOAD_STATUS/DONE = 1");
-}
-
-
-/*
- * Called when eSPI PLTRST# VWire de-asserts
- * Re-initialize any hardware that was reset while PLTRST# was
- * asserted.
- * Logical Device BAR's, etc.
- * Each BAR requires address, mask, and valid bit
- * mask = bit map of address[7:0] to mask out
- * 0 = no masking, match exact address
- * 0x01 = mask bit[0], match two consecutive addresses
- * 0xff = mask bits[7:0], match 256 consecutive bytes
- * eSPI has two registers for each BAR
- * Host visible register
- * base address in bits[31:16]
- * valid = bit[0]
- * EC only register
- * mask = bits[7:0]
- * Logical device number = bits[13:8]
- * Virtualized = bit[16] Not Implemented
- */
-static void espi_host_init(void)
-{
- CPRINTS("eSPI - espi_host_init");
-
- /* BAR's */
-
- /* Configuration IO BAR set to 0x2E/0x2F */
- MCHP_ESPI_IO_BAR_CTL_MASK(MCHP_ESPI_IO_BAR_ID_CFG_PORT) = 0x01;
- MCHP_ESPI_IO_BAR_ADDR_LSB(MCHP_ESPI_IO_BAR_ID_CFG_PORT) = 0x2E;
- MCHP_ESPI_IO_BAR_ADDR_MSB(MCHP_ESPI_IO_BAR_ID_CFG_PORT) = 0x00;
- MCHP_ESPI_IO_BAR_VALID(MCHP_ESPI_IO_BAR_ID_CFG_PORT) = 1;
-
- /* Set up ACPI0 for 0x62/0x66 */
- chip_acpi_ec_config(0, 0x62, 0x04);
-
- /* Set up ACPI1 for 0x200-0x203, 0x204-0x207 */
- chip_acpi_ec_config(1, 0x200, 0x07);
-
- /* Set up 8042 interface at 0x60/0x64 */
- chip_8042_config(0x60);
-
- /* EMI at 0x800 for accessing shared memory */
- chip_emi0_config(0x800);
-
- /* Setup Port80 Debug Hardware for I/O 80h */
- chip_port80_config(0x80);
-
- lpc_mem_mapped_init();
-
- MCHP_ESPI_PC_STATUS = 0xfffffffful;
- /* PC enable & Mastering enable changes */
- MCHP_ESPI_PC_IEN = (1ul << 25) + (1ul << 28);
-
-
- /* Sufficiently initialized */
- lpc_set_init_done(1);
-
- /* last set eSPI Peripheral Channel Ready = 1 */
- /* Done in ISR for PC Channel */
- MCHP_ESPI_IO_PC_READY = 1;
-
- /* Update host events now that we can copy them to memmap */
- /* NOTE: This routine may pulse SCI# and/or SMI#
- * For eSPI these are virtual wires. VWire channel should be
- * enabled before PLTRST# is de-asserted so its safe BUT has
- * PC Channel(I/O) Enable occurred?
- */
- lpc_update_host_event_status();
-
- CPRINTS("eSPI - espi_host_init Done");
-}
-DECLARE_HOOK(HOOK_CHIPSET_STARTUP, espi_host_init, HOOK_PRIO_FIRST);
-
-
-/*
- * Called in response to VWire OOB_RST_WARN==1 from
- * espi_vw_evt_oob_rst_warn.
- * Host chipset eSPI documentation states eSPI slave should
- * if necessary flush any OOB upstream (OOB TX) data before the slave
- * sends OOB_RST_ACK=1 to the Host.
- */
-static void espi_oob_flush(void)
-{
-}
-
-
-/*
- * Called in response to VWire HOST_RST_WARN==1 from
- * espi_vw_evt_host_rst_warn.
- * Host chipset eSPI documentation states assertion of HOST_RST_WARN
- * can be used if necessary to flush any Peripheral Channel data
- * before slave sends HOST_RST_ACK to Host.
- */
-static void espi_pc_flush(void)
-{
-}
-
-/* The ISRs of VW signals which used for power sequences */
-void espi_vw_power_signal_interrupt(enum espi_vw_signal signal)
-{
- CPRINTS("eSPI power signal interrupt for VW %d", signal);
- power_signal_interrupt((enum gpio_signal) signal);
-}
-
-/************************************************************************/
-/* IC specific low-level driver */
-
-
-/**
- * Set eSPI Virtual-Wire signal to Host
- *
- * @param signal vw signal needs to set
- * @param level level of vw signal
- * @return EC_SUCCESS, or non-zero if error.
- */
-int espi_vw_set_wire(enum espi_vw_signal signal, uint8_t level)
-{
- int tidx;
- uint8_t ridx, src_num;
-
- tidx = espi_vw_get_signal_index(signal);
-
- if (tidx < 0)
- return EC_ERROR_PARAM1;
-
- if (0 == (vw_info_tbl[tidx].flags & (1u << 0)))
- return EC_ERROR_PARAM1; /* signal is Master-to-Slave */
-
- ridx = vw_info_tbl[tidx].reg_idx;
- src_num = vw_info_tbl[tidx].src_num;
-
- if (level)
- level = 1;
-
- if (signal == VW_PERIPHERAL_BTLD_STATUS_DONE) {
- /* SLAVE_BOOT_LOAD_STATUS */
- MCHP_ESPI_VW_S2M_SRC3(ridx) = level;
- /* SLAVE_BOOT_LOAD_DONE after status */
- MCHP_ESPI_VW_S2M_SRC0(ridx) = level;
- } else {
- MCHP_ESPI_VW_S2M_SRC(ridx, src_num) = level;
- }
-
-#ifdef CONFIG_MCHP_ESPI_DEBUG
- CPRINTS("eSPI VW Set Wire %s = %d",
- espi_vw_get_wire_name(signal), level);
-#endif
-
- return EC_SUCCESS;
-}
-
-/*
- * Set Slave to Master virtual wire to level and wait for hardware
- * to process virtual wire.
- * If virtual wire written to same value then hardware change bit
- * is 0 and routine returns success.
- * If virtual wire written to different value then hardware change bit
- * goes to 1 until bit is transmitted upstream to the master. This may
- * happen quickly is bus is idle. Poll for hardware clearing change bit
- * until timeout.
- */
-static int espi_vw_s2m_set_w4m(uint32_t ridx, uint32_t src_num,
- uint8_t level)
-{
- uint32_t i;
-
- MCHP_ESPI_VW_S2M_SRC(ridx, src_num) = level & 0x01;
-
- for (i = 0; i < ESPI_S2M_VW_PULSE_LOOP_CNT; i++) {
- if ((MCHP_ESPI_VW_S2M_CHANGE(ridx) &
- (1u << src_num)) == 0)
- return EC_SUCCESS;
- udelay(ESPI_S2M_VW_PULSE_LOOP_DLY_US);
- }
-
- return EC_ERROR_TIMEOUT;
-}
-
-/*
- * Create a pulse on a Slave-to-Master VWire
- * Use case is generate low pulse on SCI# virtual wire.
- * Should a timeout mechanism be added because we are
- * waiting on Host eSPI Master to respond to eSPI Alert and
- * then read the VWires. If the eSPI Master is OK the maximum
- * time will still be variable depending upon link frequency and
- * other activity on the link. Other activity is currently bounded by
- * Host chipset eSPI maximum payload length of 64 bytes + packet overhead.
- * Lowest eSPI transfer rate is 1x at 20 MHz, assume 30% packet overhead.
- * (64 * 1.3) * 8 = 666 bits is roughly 34 us. Pad to 100 us.
- */
-int espi_vw_pulse_wire(enum espi_vw_signal signal, int pulse_level)
-{
- int rc, tidx;
- uint8_t ridx, src_num, level;
-
- tidx = espi_vw_get_signal_index(signal);
-
- if (tidx < 0)
- return EC_ERROR_PARAM1;
-
- if (0 == (vw_info_tbl[tidx].flags & (1u << 0)))
- return EC_ERROR_PARAM1; /* signal is Master-to-Slave */
-
- ridx = vw_info_tbl[tidx].reg_idx;
- src_num = vw_info_tbl[tidx].src_num;
-
- level = 0;
- if (pulse_level)
- level = 1;
-
-#ifdef CONFIG_MCHP_ESPI_DEBUG
- CPRINTS("eSPI VW Pulse Wire %s to %d",
- espi_vw_get_wire_name(signal), level);
-#endif
-
- /* set requested inactive state */
- rc = espi_vw_s2m_set_w4m(ridx, src_num, ~level);
- if (rc != EC_SUCCESS)
- return rc;
-
- /* drive to requested active state */
- rc = espi_vw_s2m_set_w4m(ridx, src_num, level);
- if (rc != EC_SUCCESS)
- return rc;
-
- /* set to requested inactive state */
- rc = espi_vw_s2m_set_w4m(ridx, src_num, ~level);
-
- return rc;
-}
-
-/**
- * Get eSPI Virtual-Wire signal from host
- *
- * @param signal vw signal needs to get
- * @return 1: set by host, otherwise: no signal
- */
-int espi_vw_get_wire(enum espi_vw_signal signal)
-{
- int vw, tidx;
- uint8_t ridx, src_num;
-
- vw = 0;
- tidx = espi_vw_get_signal_index(signal);
-
- if (tidx >= 0 && (0 == (vw_info_tbl[tidx].flags & (1u << 0)))) {
- ridx = vw_info_tbl[tidx].reg_idx;
- src_num = vw_info_tbl[tidx].src_num;
- vw = MCHP_ESPI_VW_M2S_SRC(ridx, src_num) & 0x01;
-#ifdef CONFIG_MCHP_ESPI_DEBUG
- CPRINTS("VW GetWire %s = %d",
- espi_vw_get_wire_name(signal), vw);
-#endif
- }
-
- return vw;
-}
-
-/**
- * Enable VW interrupt of power sequence signal
- *
- * @param signal vw signal needs to enable interrupt
- * @return EC_SUCCESS, or non-zero if error.
- */
-int espi_vw_enable_wire_int(enum espi_vw_signal signal)
-{
- int tidx;
- uint8_t ridx, src_num, girq_num, bpos;
-
- tidx = espi_vw_get_signal_index(signal);
-
- if (tidx < 0)
- return EC_ERROR_PARAM1;
-
- if (0 != (vw_info_tbl[tidx].flags & (1u << 0)))
- return EC_ERROR_PARAM1; /* signal is Slave-to-Master */
-
-#ifdef CONFIG_MCHP_ESPI_DEBUG
- CPRINTS("VW IntrEn for VW[%s]",
- espi_vw_get_wire_name(signal));
-#endif
-
- ridx = vw_info_tbl[tidx].reg_idx;
- src_num = vw_info_tbl[tidx].src_num;
-
- /*
- * Set SRCn_IRQ_SELECT field for VWire to either edge
- * Write enable set bit in GIRQ24 or GIRQ25
- * GIRQ24 MSVW00[0:3] through MSVW06[0:3] (bits[0:27])
- * GIRQ25 MSVW07[0:3] through MSVW10[0:3] (bits[0:25])
- */
- MCHP_ESPI_VW_M2S_IRQSEL(ridx, src_num) =
- MCHP_ESPI_MSVW_IRQSEL_BOTH_EDGES;
-
- girq_num = 24;
- if (ridx > 6) {
- girq_num++;
- ridx -= 7;
- }
- bpos = (ridx << 2) + src_num;
-
- MCHP_INT_SOURCE(girq_num) = (1ul << bpos);
- MCHP_INT_ENABLE(girq_num) = (1ul << bpos);
-
- return EC_SUCCESS;
-}
-
-/**
- * Disable VW interrupt of power sequence signal
- *
- * @param signal vw signal needs to disable interrupt
- * @return EC_SUCCESS, or non-zero if error.
- */
-int espi_vw_disable_wire_int(enum espi_vw_signal signal)
-{
- int tidx;
- uint8_t ridx, src_num, bpos;
-
- tidx = espi_vw_get_signal_index(signal);
-
- if (tidx < 0)
- return EC_ERROR_PARAM1;
-
- if (0 != (vw_info_tbl[tidx].flags & (1u << 0)))
- return EC_ERROR_PARAM1; /* signal is Slave-to-Master */
-
-#ifdef CONFIG_MCHP_ESPI_DEBUG
- CPRINTS("VW IntrDis for VW[%s]",
- espi_vw_get_wire_name(signal));
-#endif
-
- ridx = vw_info_tbl[tidx].reg_idx;
- src_num = vw_info_tbl[tidx].src_num;
-
- /*
- * Set SRCn_IRQ_SELECT field for VWire to disabled
- * Write enable set bit in GIRQ24 or GIRQ25
- * GIRQ24 MSVW00[0:3] through MSVW06[0:3] (bits[0:27])
- * GIRQ25 MSVW07[0:3] through MSVW10[0:3] (bits[0:25])
- */
- MCHP_ESPI_VW_M2S_IRQSEL(ridx, src_num) =
- MCHP_ESPI_MSVW_IRQSEL_DISABLED;
-
- if (ridx < 7) {
- bpos = (ridx << 2) + src_num;
- MCHP_INT_DISABLE(24) = (1ul << bpos);
-
- } else {
- bpos = ((ridx - 7) << 2) + src_num;
- MCHP_INT_DISABLE(25) = (1ul << bpos);
- }
-
- return EC_SUCCESS;
-}
-
-/************************************************************************/
-/* VW event handlers */
-
-#ifdef CONFIG_CHIPSET_RESET_HOOK
-static void espi_chipset_reset(void)
-{
- hook_notify(HOOK_CHIPSET_RESET);
-}
-DECLARE_DEFERRED(espi_chipset_reset);
-#endif
-
-
-/* SLP_Sx event handler */
-void espi_vw_evt_slp_s3_n(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW SLP_S3: %d", wire_state);
- espi_vw_power_signal_interrupt(VW_SLP_S3_L);
-}
-
-void espi_vw_evt_slp_s4_n(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW SLP_S4: %d", wire_state);
- espi_vw_power_signal_interrupt(VW_SLP_S4_L);
-}
-
-void espi_vw_evt_slp_s5_n(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW SLP_S5: %d", wire_state);
- espi_vw_power_signal_interrupt(VW_SLP_S5_L);
-}
-
-void espi_vw_evt_sus_stat_n(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW SUS_STAT: %d", wire_state);
- espi_vw_power_signal_interrupt(VW_SUS_STAT_L);
-}
-
-/* PLTRST# event handler */
-void espi_vw_evt_pltrst_n(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW PLTRST#: %d", wire_state);
-
- if (wire_state) /* Platform Reset de-assertion */
- espi_host_init();
- else /* assertion */
-#ifdef CONFIG_CHIPSET_RESET_HOOK
- hook_call_deferred(&espi_chipset_reset_data, MSEC);
-#endif
-
-}
-
-/* OOB Reset Warn event handler */
-void espi_vw_evt_oob_rst_warn(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW OOB_RST_WARN: %d", wire_state);
-
- espi_oob_flush();
-
- espi_vw_set_wire(VW_OOB_RST_ACK, wire_state);
-}
-
-/* SUS_WARN# event handler */
-void espi_vw_evt_sus_warn_n(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW SUS_WARN#: %d", wire_state);
-
- udelay(100);
-
- /*
- * Add any Deep Sx prep here
- * NOTE: we could schedule a deferred function and have
- * it send ACK to host after preparing for Deep Sx
- */
-#ifdef CONFIG_MCHP_ESPI_VW_SAVE_ON_SLEEP
- espi_vw_save();
-#endif
- /* Send ACK to host by WARN#'s wire */
- espi_vw_set_wire(VW_SUS_ACK, wire_state);
-}
-
-/*
- * SUS_PWRDN_ACK
- * PCH is informing us it does not need suspend power well.
- * if SUS_PWRDN_ACK == 1 we can turn off suspend power well assuming
- * hardware design allow.
- */
-void espi_vw_evt_sus_pwrdn_ack(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW SUS_PWRDN_ACK: %d", wire_state);
-}
-
-/* SLP_A#(SLP_M#) */
-void espi_vw_evt_slp_a_n(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW SLP_A: %d", wire_state);
-
- /* Put handling of ASW well devices here, if any */
-}
-
-/* HOST_RST WARN event handler */
-void espi_vw_evt_host_rst_warn(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW HOST_RST_WARN: %d", wire_state);
-
- espi_pc_flush();
-
- /* Send HOST_RST_ACK to host */
- espi_vw_set_wire(VW_HOST_RST_ACK, wire_state);
-}
-
-/* SLP_LAN# */
-void espi_vw_evt_slp_lan_n(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW SLP_LAN: %d", wire_state);
-}
-
-/* SLP_WLAN# */
-void espi_vw_evt_slp_wlan_n(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW SLP_WLAN: %d", wire_state);
-
-}
-
-void espi_vw_evt_host_c10(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("VW HOST_C10: %d", wire_state);
-}
-
-void espi_vw_evt1_dflt(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("Unknown M2S VW: state=%d GIRQ24 bitpos=%d", wire_state, bpos);
-}
-
-void espi_vw_evt2_dflt(uint32_t wire_state, uint32_t bpos)
-{
- CPRINTS("Unknown M2S VW: state=%d GIRQ25 bitpos=%d", wire_state, bpos);
-}
-
-/************************************************************************/
-/* Interrupt handlers */
-
-/* MEC1701H
- * GIRQ19 all direct connect capable, none wake capable
- * b[0] = Peripheral Channel (PC)
- * b[1] = Bus Master 1 (BM1)
- * b[2] = Bus Master 2 (BM2)
- * b[3] = LTR
- * b[4] = OOB_UP
- * b[5] = OOB_DN
- * b[6] = Flash Channel (FC)
- * b[7] = ESPI_RESET# change
- * b[8] = VWire Channel (VW) enable assertion
- * b[9:31] = 0 reserved
- *
- * GIRQ22 b[9]=ESPI interface wake peripheral logic only, not EC.
- * Not direct connect capable
- *
- * GIRQ24
- * b[0:3] = MSVW00_SRC[0:3]
- * b[4:7] = MSVW01_SRC[0:3]
- * b[8:11] = MSVW02_SRC[0:3]
- * b[12:15] = MSVW03_SRC[0:3]
- * b[16:19] = MSVW04_SRC[0:3]
- * b[20:23] = MSVW05_SRC[0:3]
- * b[24:27] = MSVW06_SRC[0:3]
- * b[28:31] = 0 reserved
- *
- * GIRQ25
- * b[0:3] = MSVW07_SRC[0:3]
- * b[4:7] = MSVW08_SRC[0:3]
- * b[8:11] = MSVW09_SRC[0:3]
- * b[12:15] = MSVW10_SRC[0:3]
- * b[16:31] = 0 reserved
- *
- */
-
-typedef void (*FPVW)(uint32_t, uint32_t);
-
-#define MCHP_GIRQ24_NUM_M2S (7 * 4)
-const FPVW girq24_vw_handlers[MCHP_GIRQ24_NUM_M2S] = {
- espi_vw_evt_slp_s3_n, /* MSVW00, Host M2S 02h */
- espi_vw_evt_slp_s4_n,
- espi_vw_evt_slp_s5_n,
- espi_vw_evt1_dflt,
- espi_vw_evt_sus_stat_n, /* MSVW01, Host M2S 03h */
- espi_vw_evt_pltrst_n,
- espi_vw_evt_oob_rst_warn,
- espi_vw_evt1_dflt,
- espi_vw_evt_host_rst_warn, /* MSVW02, Host M2S 07h */
- espi_vw_evt1_dflt,
- espi_vw_evt1_dflt,
- espi_vw_evt1_dflt,
- espi_vw_evt_sus_warn_n, /* MSVW03, Host M2S 41h */
- espi_vw_evt_sus_pwrdn_ack,
- espi_vw_evt1_dflt,
- espi_vw_evt_slp_a_n,
- espi_vw_evt_slp_lan_n, /* MSVW04, Host M2S 42h */
- espi_vw_evt_slp_wlan_n,
- espi_vw_evt1_dflt,
- espi_vw_evt1_dflt,
- espi_vw_evt1_dflt, /* MSVW05, Host M2S 43h */
- espi_vw_evt1_dflt,
- espi_vw_evt1_dflt,
- espi_vw_evt1_dflt,
- espi_vw_evt1_dflt, /* MSVW06, Host M2S 44h */
- espi_vw_evt1_dflt,
- espi_vw_evt1_dflt,
- espi_vw_evt1_dflt
-};
-
-#define MCHP_GIRQ25_NUM_M2S (4 * 4)
-const FPVW girq25_vw_handlers[MCHP_GIRQ25_NUM_M2S] = {
- espi_vw_evt_host_c10, /* MSVW07, Host M2S 47h */
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt, /* MSVW08 unassigned */
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt, /* MSVW09 unassigned */
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt, /* MSVW10 unassigned */
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt,
- espi_vw_evt2_dflt,
-};
-
-/* Interrupt handler for eSPI virtual wires in MSVW00 - MSVW01 */
-void espi_mswv1_interrupt(void)
-{
- uint32_t d, girq24_result, bpos;
-
- d = MCHP_INT_ENABLE(24);
- girq24_result = MCHP_INT_RESULT(24);
- MCHP_INT_SOURCE(24) = girq24_result;
-
- bpos = __builtin_ctz(girq24_result); /* rbit, clz sequence */
- while (bpos != 32) {
- d = *(uint8_t *)(MCHP_ESPI_MSVW_BASE + 8 +
- (12 * (bpos >> 2)) + (bpos & 0x03)) & 0x01;
- (girq24_vw_handlers[bpos])(d, bpos);
- girq24_result &= ~(1ul << bpos);
- bpos = __builtin_ctz(girq24_result);
- }
-}
-DECLARE_IRQ(MCHP_IRQ_GIRQ24, espi_mswv1_interrupt, 2);
-
-
-/* Interrupt handler for eSPI virtual wires in MSVW07 - MSVW10 */
-void espi_msvw2_interrupt(void)
-{
- uint32_t d, girq25_result, bpos;
-
- d = MCHP_INT_ENABLE(25);
- girq25_result = MCHP_INT_RESULT(25);
- MCHP_INT_SOURCE(25) = girq25_result;
-
- bpos = __builtin_ctz(girq25_result); /* rbit, clz sequence */
- while (bpos != 32) {
- d = *(uint8_t *)(MCHP_ESPI_MSVW_BASE + (12 * 7) + 8 +
- (12 * (bpos >> 2)) + (bpos & 0x03)) & 0x01;
- (girq25_vw_handlers[bpos])(d, bpos);
- girq25_result &= ~(1ul << bpos);
- bpos = __builtin_ctz(girq25_result);
- }
-}
-DECLARE_IRQ(MCHP_IRQ_GIRQ25, espi_msvw2_interrupt, 2);
-
-
-
-/*
- * NOTES:
- * While ESPI_RESET# is asserted, all eSPI blocks are held in reset and
- * their registers can't be programmed. All channel Enable and Ready bits
- * are cleared. The only operational logic is the ESPI_RESET# change
- * detection logic.
- * Once ESPI_RESET# de-asserts, firmware can enable interrupts on all
- * other eSPI channels/components.
- * Implications are:
- * ESPI_RESET# assertion -
- * All channel ready bits are cleared stopping all outstanding
- * transactions and clearing registers and internal FIFO's.
- * ESPI_RESET# de-assertion -
- * All channels/components can now be programmed and can detect
- * reception of channel enable messages from the eSPI Master.
- */
-
-/*
- * eSPI Reset change handler
- * Multiple scenarios must be handled.
- * eSPI Link initialization from de-assertion of RSMRST#
- * Upon RSMRST# de-assertion, the PCH may drive ESPI_RESET# low
- * and then back high. If the platform has a pull-down on ESPI_RESET#
- * then we will not see both edges. We must handle the scenario where
- * ESPI_RESET# has only a rising edge or is pulsed low once RSMRST#
- * has been released.
- * eSPI Link is operational and PCH asserts ESPI_RESET# due to
- * global reset event or some other system problem.
- * eSPI link is operational and the system generates a global reset
- * event to the PCH. EC is unaware of global reset and sees PCH
- * activate ESPI_RESET#.
- *
- * ESPI_RESET# assertion will disable all MCHP eSPI channel ready
- * bits and place all channels is reset state. Any hardware affected by
- * ESPI_RESET# must be re-initialized after ESPI_RESET# de-asserts.
- *
- * Note ESPI_RESET# is not equivalent to LPC LRESET#. LRESET# is
- * equivalent to eSPI Platform Reset.
- *
- */
-void espi_reset_isr(void)
-{
- uint8_t erst;
-
- erst = MCHP_ESPI_IO_RESET_STATUS;
- MCHP_ESPI_IO_RESET_STATUS = erst;
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) = MCHP_ESPI_RESET_GIRQ_BIT;
- if (erst & (1ul << 1)) { /* rising edge - reset de-asserted */
- MCHP_INT_ENABLE(MCHP_ESPI_GIRQ) = (
- MCHP_ESPI_PC_GIRQ_BIT +
- MCHP_ESPI_OOB_TX_GIRQ_BIT +
- MCHP_ESPI_FC_GIRQ_BIT +
- MCHP_ESPI_VW_EN_GIRQ_BIT);
- MCHP_ESPI_OOB_TX_IEN = (1ul << 1);
- MCHP_ESPI_FC_IEN = (1ul << 1);
- MCHP_ESPI_PC_IEN = (1ul << 25);
- CPRINTS("eSPI Reset de-assert");
-
- } else { /* falling edge - reset asserted */
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) = (
- MCHP_ESPI_PC_GIRQ_BIT +
- MCHP_ESPI_OOB_TX_GIRQ_BIT +
- MCHP_ESPI_FC_GIRQ_BIT +
- MCHP_ESPI_VW_EN_GIRQ_BIT);
- MCHP_INT_DISABLE(MCHP_ESPI_GIRQ) = (
- MCHP_ESPI_PC_GIRQ_BIT +
- MCHP_ESPI_OOB_TX_GIRQ_BIT +
- MCHP_ESPI_FC_GIRQ_BIT +
- MCHP_ESPI_VW_EN_GIRQ_BIT);
- espi_channels_ready = 0;
-
- chipset_handle_espi_reset_assert();
-
- CPRINTS("eSPI Reset assert");
- }
-}
-DECLARE_IRQ(MCHP_IRQ_ESPI_RESET, espi_reset_isr, 3);
-
-/*
- * eSPI Virtual Wire channel enable handler
- * Must disable once VW Enable is set by eSPI Master
- */
-void espi_vw_en_isr(void)
-{
- MCHP_INT_DISABLE(MCHP_ESPI_GIRQ) = MCHP_ESPI_VW_EN_GIRQ_BIT;
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) = MCHP_ESPI_VW_EN_GIRQ_BIT;
-
- MCHP_ESPI_IO_VW_READY = 1;
-
- espi_channels_ready |= (1ul << 0);
-
- CPRINTS("eSPI VW Enable received, set VW Ready");
-
- if (0x03 == (espi_channels_ready & 0x03))
- espi_send_boot_load_done();
-}
-DECLARE_IRQ(MCHP_IRQ_ESPI_VW_EN, espi_vw_en_isr, 2);
-
-
-/*
- * eSPI OOB TX and OOB channel enable change interrupt handler
- */
-void espi_oob_tx_isr(void)
-{
- uint32_t sts;
-
- sts = MCHP_ESPI_OOB_TX_STATUS;
- MCHP_ESPI_OOB_TX_STATUS = sts;
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) = MCHP_ESPI_OOB_TX_GIRQ_BIT;
- if (sts & (1ul << 1)) {
- /* Channel Enable change */
- if (sts & (1ul << 9)) { /* enable? */
- MCHP_ESPI_OOB_RX_LEN = 73;
- MCHP_ESPI_IO_OOB_READY = 1;
- espi_channels_ready |= (1ul << 2);
- CPRINTS("eSPI OOB_UP ISR: OOB Channel Enable");
- } else { /* no, disabled by Master */
- espi_channels_ready &= ~(1ul << 2);
- CPRINTS("eSPI OOB_UP ISR: OOB Channel Disable");
- }
- } else {
- /* Handle OOB Up transmit status: done and/or errors, here */
- CPRINTS("eSPI OOB_UP status = 0x%x", sts);
- }
-}
-DECLARE_IRQ(MCHP_IRQ_ESPI_OOB_UP, espi_oob_tx_isr, 2);
-
-
-/* eSPI OOB RX interrupt handler */
-void espi_oob_rx_isr(void)
-{
- uint32_t sts;
-
- sts = MCHP_ESPI_OOB_RX_STATUS;
- MCHP_ESPI_OOB_RX_STATUS = sts;
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) = MCHP_ESPI_OOB_RX_GIRQ_BIT;
- /* Handle OOB Up transmit status: done and/or errors, if any */
- CPRINTS("eSPI OOB_DN status = 0x%x", sts);
-}
-DECLARE_IRQ(MCHP_IRQ_ESPI_OOB_DN, espi_oob_rx_isr, 2);
-
-
-/*
- * eSPI Flash Channel enable change and data transfer
- * interrupt handler
- */
-void espi_fc_isr(void)
-{
- uint32_t sts;
-
- sts = MCHP_ESPI_FC_STATUS;
- MCHP_ESPI_FC_STATUS = sts;
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) = MCHP_ESPI_FC_GIRQ_BIT;
- if (sts & (1ul << 1)) {
- /* Channel Enable change */
- if (sts & (1ul << 0)) { /* enable? */
- MCHP_ESPI_IO_FC_READY = 1;
- espi_channels_ready |= (1ul << 1);
- CPRINTS("eSPI FC ISR: Enable");
- if (0x03 == (espi_channels_ready & 0x03))
- espi_send_boot_load_done();
- } else { /* no, disabled by Master */
- espi_channels_ready &= ~(1ul << 1);
- CPRINTS("eSPI FC ISR: Disable");
- }
- } else {
- /* Handle FC command status: done and/or errors */
- CPRINTS("eSPI FC status = 0x%x", sts);
- }
-}
-DECLARE_IRQ(MCHP_IRQ_ESPI_FC, espi_fc_isr, 2);
-
-
-/* eSPI Peripheral Channel interrupt handler */
-void espi_pc_isr(void)
-{
- uint32_t sts;
-
- sts = MCHP_ESPI_PC_STATUS;
- MCHP_ESPI_PC_STATUS = sts;
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) = MCHP_ESPI_PC_GIRQ_BIT;
- if (sts & (1ul << 25)) {
- if (sts & (1ul << 24)) {
- MCHP_ESPI_IO_PC_READY = 1;
- espi_channels_ready |= (1ul << 3);
- CPRINTS("eSPI PC Channel Enable");
- } else {
- espi_channels_ready &= ~(1ul << 3);
- CPRINTS("eSPI PC Channel Disable");
- }
-
- } else {
- /* Handler PC channel errors here */
- CPRINTS("eSPI PC status = 0x%x", sts);
- }
-}
-DECLARE_IRQ(MCHP_IRQ_ESPI_PC, espi_pc_isr, 2);
-
-
-/************************************************************************/
-
-/*
- * Enable/disable direct mode interrupt for ESPI_RESET# change.
- * Optionally clear status before enable or after disable.
- */
-static void espi_reset_ictrl(int enable, int clr_status)
-{
- if (enable) {
- if (clr_status) {
- MCHP_ESPI_IO_RESET_STATUS =
- MCHP_ESPI_RST_CHG_STS;
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) =
- MCHP_ESPI_RESET_GIRQ_BIT;
- }
- MCHP_ESPI_IO_RESET_IEN |= MCHP_ESPI_RST_IEN;
- MCHP_INT_ENABLE(MCHP_ESPI_GIRQ) =
- MCHP_ESPI_RESET_GIRQ_BIT;
- task_enable_irq(MCHP_IRQ_ESPI_RESET);
- } else {
- task_disable_irq(MCHP_IRQ_ESPI_RESET);
- MCHP_INT_DISABLE(MCHP_ESPI_GIRQ) =
- MCHP_ESPI_RESET_GIRQ_BIT;
- MCHP_ESPI_IO_RESET_IEN &= ~(MCHP_ESPI_RST_IEN);
- if (clr_status) {
- MCHP_ESPI_IO_RESET_STATUS =
- MCHP_ESPI_RST_CHG_STS;
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) =
- MCHP_ESPI_RESET_GIRQ_BIT;
- }
- }
-}
-
-/* eSPI Initialization functions */
-
-/* MEC1701H */
-void espi_init(void)
-{
- espi_channels_ready = 0;
-
- CPRINTS("eSPI - espi_init");
-
- /* Clear PCR eSPI sleep enable */
- MCHP_PCR_SLP_DIS_DEV(MCHP_PCR_ESPI);
-
- /*
- * b[8]=0(eSPI PLTRST# VWire is platform reset), b[0]=0
- * VCC_PWRGD is asserted when PLTRST# VWire is 1(inactive)
- */
- MCHP_PCR_PWR_RST_CTL = 0;
-
- /*
- * There is no MODULE_ESPI in include/module_id.h
- * eSPI pins marked as MODULE_LPC in board/myboard/board.h
- * eSPI pins are on VTR3.
- * Make sure VTR3 chip knows VTR3 is 1.8V
- * This is done in system_pre_init()
- */
- gpio_config_module(MODULE_LPC, 1);
-
- /* Set channel */
- MCHP_ESPI_IO_CAP0 = CONFIG_HOSTCMD_ESPI_EC_CHAN_BITMAP;
-
- /* Set eSPI frequency & mode */
- MCHP_ESPI_IO_CAP1 = (MCHP_ESPI_IO_CAP1 &
- (~(MCHP_ESPI_CAP1_MAX_FREQ_MASK |
- MCHP_ESPI_CAP1_IO_MASK))) |
- CONFIG_HOSTCMD_ESPI_EC_MAX_FREQ |
- (CONFIG_HOSTCMD_ESPI_EC_MODE
- << MCHP_ESPI_CAP1_IO_BITPOS);
-
-#ifdef CONFIG_HOSTCMD_ESPI
- MCHP_ESPI_IO_PLTRST_SRC = MCHP_ESPI_PLTRST_SRC_VW;
-#else
- MCHP_ESPI_IO_PLTRST_SRC = MCHP_ESPI_PLTRST_SRC_PIN;
-#endif
-
- MCHP_PCR_PWR_RST_CTL &=
- ~(1ul << MCHP_PCR_PWR_HOST_RST_SEL_BITPOS);
-
- MCHP_ESPI_ACTIVATE = 1;
-
- espi_bar_pre_init();
-
- /*
- * VWires are configured to be reset by different events.
- * Default configuration has:
- * RESET_SYS (chip reset) MSVW00, MSVW04
- * RESET_ESPI MSVW01, MSVW03, SMVW00, SMVW01
- * PLTRST MSVW02, SMVW02
- */
- espi_vw_pre_init();
-
- /*
- * Configure MSVW00 & MSVW04
- * Any change to default values (SRCn bits)
- * Any change to interrupt enable, SRCn_IRQ_SELECT bit fields
- * Should interrupt bits in MSVWyx and GIRQ24/25 be touched
- * before ESPI_RESET# de-asserts?
- */
-
- MCHP_ESPI_PC_STATUS = 0xfffffffful;
- MCHP_ESPI_OOB_RX_STATUS = 0xfffffffful;
- MCHP_ESPI_FC_STATUS = 0xfffffffful;
- MCHP_INT_DISABLE(MCHP_ESPI_GIRQ) = 0xfffffffful;
- MCHP_INT_SOURCE(MCHP_ESPI_GIRQ) = 0xfffffffful;
-
- task_enable_irq(MCHP_IRQ_ESPI_PC);
- task_enable_irq(MCHP_IRQ_ESPI_OOB_UP);
- task_enable_irq(MCHP_IRQ_ESPI_OOB_DN);
- task_enable_irq(MCHP_IRQ_ESPI_FC);
- task_enable_irq(MCHP_IRQ_ESPI_VW_EN);
-
- /* Enable eSPI Master-to-Slave Virtual wire NVIC inputs
- * VWire block interrupts are all disabled by default
- * and will be controlled by espi_vw_enable/disable_wire_in
- */
- CPRINTS("eSPI - enable ESPI_RESET# interrupt");
-
- /* Enable ESPI_RESET# interrupt and clear status */
- espi_reset_ictrl(1, 1);
-
- CPRINTS("eSPI - espi_init - done");
-}
-
-
-#ifdef CONFIG_MCHP_ESPI_EC_CMD
-static int command_espi(int argc, char **argv)
-{
- uint32_t chan, w0, w1, w2;
- char *e;
-
- if (argc == 1) {
- return EC_ERROR_INVAL;
- /* Get value of eSPI registers */
- } else if (argc == 2) {
- int i;
-
- if (strcasecmp(argv[1], "cfg") == 0) {
- ccprintf("eSPI Reg32A [0x%08x]\n",
- MCHP_ESPI_IO_REG32_A);
- ccprintf("eSPI Reg32B [0x%08x]\n",
- MCHP_ESPI_IO_REG32_B);
- ccprintf("eSPI Reg32C [0x%08x]\n",
- MCHP_ESPI_IO_REG32_C);
- ccprintf("eSPI Reg32D [0x%08x]\n",
- MCHP_ESPI_IO_REG32_D);
- } else if (strcasecmp(argv[1], "vsm") == 0) {
- for (i = 0; i < MSVW_MAX; i++) {
- w0 = MSVW(i, 0);
- w1 = MSVW(i, 1);
- w2 = MSVW(i, 2);
- ccprintf("MSVW%d: 0x%08x:%08x:%08x\n", i,
- w2, w1, w0);
- }
- } else if (strcasecmp(argv[1], "vms") == 0) {
- for (i = 0; i < SMVW_MAX; i++) {
- w0 = SMVW(i, 0);
- w1 = SMVW(i, 1);
- ccprintf("SMVW%d: 0x%08x:%08x\n", i, w1, w0);
- }
- }
- /* Enable/Disable the channels of eSPI */
- } else if (argc == 3) {
- uint32_t m = (uint32_t) strtoi(argv[2], &e, 0);
-
- if (*e)
- return EC_ERROR_PARAM2;
- if (m < 0 || m > 4)
- return EC_ERROR_PARAM2;
- else if (m == 4)
- chan = 0x0F;
- else
- chan = 0x01 << m;
- if (strcasecmp(argv[1], "en") == 0)
- MCHP_ESPI_IO_CAP0 |= chan;
- else if (strcasecmp(argv[1], "dis") == 0)
- MCHP_ESPI_IO_CAP0 &= ~chan;
- else
- return EC_ERROR_PARAM1;
- ccprintf("eSPI IO Cap0 [0x%02x]\n", MCHP_ESPI_IO_CAP0);
- }
- return EC_SUCCESS;
-}
-DECLARE_CONSOLE_COMMAND(espi, command_espi,
- "cfg/vms/vsm/en/dis [channel]",
- "eSPI configurations");
-#endif