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espi: mec172x: (ACPI EC0 / custom) opcodes support

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Add support for ACPI EC0 and custom opcodes

Signed-off-by: Jay Vasanth <jay.vasanth@microchip.com>
This commit is contained in:
Jay Vasanth 2022-03-04 17:53:22 -05:00 • committed by Maureen Helm
commit 9431e7d128
1 changed files with 120 additions and 12 deletions
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132
drivers/espi/espi_mchp_xec_host_v2.c
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@ -397,22 +397,56 @@ static int eacpi_rd_req(const struct device *dev,
enum lpc_peripheral_opcode op,
uint32_t *data)
{
ARG_UNUSED(dev);
ARG_UNUSED(op);
ARG_UNUSED(data);
struct acpi_ec_regs *acpi_ec0_hw = (struct acpi_ec_regs *)xec_acpi_ec0_cfg.regbase;
return -EINVAL;
ARG_UNUSED(dev);
switch (op) {
case EACPI_OBF_HAS_CHAR:
/* EC has written data back to host. OBF is
* automatically cleared after host reads
* the data
*/
*data = acpi_ec0_hw->EC_STS & MCHP_ACPI_EC_STS_OBF ? 1 : 0;
break;
case EACPI_IBF_HAS_CHAR:
*data = acpi_ec0_hw->EC_STS & MCHP_ACPI_EC_STS_IBF ? 1 : 0;
break;
case EACPI_READ_STS:
*data = acpi_ec0_hw->EC_STS;
break;
#if defined(CONFIG_ESPI_PERIPHERAL_ACPI_SHM_REGION)
case EACPI_GET_SHARED_MEMORY:
*data = (uint32_t)ec_host_cmd_sram + CONFIG_ESPI_XEC_PERIPHERAL_HOST_CMD_PARAM_SIZE;
break;
#endif /* CONFIG_ESPI_PERIPHERAL_ACPI_SHM_REGION */
default:
return -EINVAL;
}
return 0;
}
static int eacpi_wr_req(const struct device *dev,
enum lpc_peripheral_opcode op,
uint32_t *data)
{
ARG_UNUSED(dev);
ARG_UNUSED(op);
ARG_UNUSED(data);
struct acpi_ec_regs *acpi_ec0_hw = (struct acpi_ec_regs *)xec_acpi_ec0_cfg.regbase;
return -EINVAL;
ARG_UNUSED(dev);
switch (op) {
case EACPI_WRITE_CHAR:
acpi_ec0_hw->EC2OS_DATA = (*data & 0xff);
break;
case EACPI_WRITE_STS:
acpi_ec0_hw->EC_STS = (*data & 0xff);
break;
default:
return -EINVAL;
}
return 0;
}
static int connect_irq_acpi_ec0(const struct device *dev)
@ -589,6 +623,9 @@ static int init_emi0(const struct device *dev)
#ifdef CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE
static void host_cus_opcode_enable_interrupts(void);
static void host_cus_opcode_disable_interrupts(void);
static int ecust_rd_req(const struct device *dev,
enum lpc_peripheral_opcode op,
uint32_t *data)
@ -612,11 +649,32 @@ static int ecust_wr_req(const struct device *dev,
enum lpc_peripheral_opcode op,
uint32_t *data)
{
ARG_UNUSED(dev);
ARG_UNUSED(op);
ARG_UNUSED(data);
struct acpi_ec_regs *acpi_ec1_hw = (struct acpi_ec_regs *)xec_acpi_ec1_cfg.regbase;
return -EINVAL;
ARG_UNUSED(dev);
switch (op) {
case ECUSTOM_HOST_SUBS_INTERRUPT_EN:
if (*data != 0) {
host_cus_opcode_enable_interrupts();
} else {
host_cus_opcode_disable_interrupts();
}
break;
case ECUSTOM_HOST_CMD_SEND_RESULT:
/*
* Write result to the data byte. This sets the OBF
* status bit.
*/
acpi_ec1_hw->EC2OS_DATA = (*data & 0xff);
/* Clear processing flag */
acpi_ec1_hw->EC_STS &= ~MCHP_ACPI_EC_STS_UD1A;
break;
default:
return -EINVAL;
}
return 0;
}
#endif /* CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE */
@ -951,3 +1009,53 @@ int espi_xec_read_lpc_request(const struct device *dev,
return -ENOTSUP;
}
#endif /* CONFIG_ESPI_PERIPHERAL_CHANNEL */
#if defined(CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE)
static void host_cus_opcode_enable_interrupts(void)
{
/* Enable host KBC sub-device interrupt */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_8042_KBC)) {
mchp_xec_ecia_info_girq_src_en(xec_kbc0_cfg.ibf_ecia_info);
mchp_xec_ecia_info_girq_src_en(xec_kbc0_cfg.obe_ecia_info);
}
/* Enable host ACPI EC0 (Host IO) and
* ACPI EC1 (Host CMD) sub-device interrupt
*/
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_HOST_IO) ||
IS_ENABLED(CONFIG_ESPI_PERIPHERAL_EC_HOST_CMD)) {
mchp_xec_ecia_info_girq_src_en(xec_acpi_ec0_cfg.ibf_ecia_info);
mchp_xec_ecia_info_girq_src_en(xec_acpi_ec0_cfg.obe_ecia_info);
mchp_xec_ecia_info_girq_src_en(xec_acpi_ec1_cfg.ibf_ecia_info);
}
/* Enable host Port80 sub-device interrupt installation */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_DEBUG_PORT_80)) {
mchp_xec_ecia_info_girq_src_en(xec_p80bd0_cfg.ecia_info);
}
}
static void host_cus_opcode_disable_interrupts(void)
{
/* Disable host KBC sub-device interrupt */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_8042_KBC)) {
mchp_xec_ecia_info_girq_src_dis(xec_kbc0_cfg.ibf_ecia_info);
mchp_xec_ecia_info_girq_src_dis(xec_kbc0_cfg.obe_ecia_info);
}
/* Disable host ACPI EC0 (Host IO) and
* ACPI EC1 (Host CMD) sub-device interrupt
*/
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_HOST_IO) ||
IS_ENABLED(CONFIG_ESPI_PERIPHERAL_EC_HOST_CMD)) {
mchp_xec_ecia_info_girq_src_dis(xec_acpi_ec0_cfg.ibf_ecia_info);
mchp_xec_ecia_info_girq_src_dis(xec_acpi_ec0_cfg.obe_ecia_info);
mchp_xec_ecia_info_girq_src_dis(xec_acpi_ec1_cfg.ibf_ecia_info);
}
/* Disable host Port80 sub-device interrupt installation */
if (IS_ENABLED(CONFIG_ESPI_PERIPHERAL_DEBUG_PORT_80)) {
mchp_xec_ecia_info_girq_src_dis(xec_p80bd0_cfg.ecia_info);
}
}
#endif /* CONFIG_ESPI_PERIPHERAL_CUSTOM_OPCODE */