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-rw-r--r--src/soc/intel/common/block/gpio/gpio.c170
1 files changed, 114 insertions, 56 deletions
diff --git a/src/soc/intel/common/block/gpio/gpio.c b/src/soc/intel/common/block/gpio/gpio.c
index 1d28905a5e..8d262fad18 100644
--- a/src/soc/intel/common/block/gpio/gpio.c
+++ b/src/soc/intel/common/block/gpio/gpio.c
@@ -7,6 +7,7 @@
#include <console/console.h>
#include <device/device.h>
#include <fsp/debug.h>
+#include <intelblocks/cpulib.h>
#include <intelblocks/gpio.h>
#include <gpio.h>
#include <intelblocks/itss.h>
@@ -450,26 +451,58 @@ int gpio_get(gpio_t gpio_num)
return !!(reg & PAD_CFG0_RX_STATE);
}
-static int sideband_msg_err(int status, int response)
+static void
+gpio_pad_config_lock_using_sbi(const struct gpio_lock_config *pad_info,
+ uint8_t pid, uint16_t offset, const uint32_t bit_mask)
{
- if (status || response) {
- printk(BIOS_ERR, "%s: error status=%x response=%x\n",
- __func__, status, response);
- return (status == -1) ? -1 : response;
+ int status;
+ uint8_t response;
+ uint32_t data;
+ struct pcr_sbi_msg msg = {
+ .pid = pid,
+ .offset = offset,
+ .opcode = GPIO_LOCK_UNLOCK,
+ .is_posted = false,
+ .fast_byte_enable = 0xf,
+ .bar = 0,
+ .fid = 0,
+ };
+
+ if (!(pad_info->action & GPIO_LOCK_FULL)) {
+ printk(BIOS_ERR, "%s: Error: no action specified for pad %d!\n",
+ __func__, pad_info->pad);
+ return;
}
- return 0;
+ if ((pad_info->action & GPIO_LOCK_CONFIG) == GPIO_LOCK_CONFIG) {
+ if (CONFIG(DEBUG_GPIO))
+ printk(BIOS_INFO, "%s: Locking pad %d configuration\n",
+ __func__, pad_info->pad);
+ data = pcr_read32(pid, offset) | bit_mask;
+ status = pcr_execute_sideband_msg(PCH_DEV_P2SB, &msg, &data, &response);
+ if (status || response)
+ printk(BIOS_ERR, "Failed to lock GPIO PAD, response = %d\n", response);
+ }
+
+ if ((pad_info->action & GPIO_LOCK_TX) == GPIO_LOCK_TX) {
+ if (CONFIG(DEBUG_GPIO))
+ printk(BIOS_INFO, "%s: Locking pad %d Tx state\n",
+ __func__, pad_info->pad);
+ offset += sizeof(uint32_t);
+ data = pcr_read32(pid, offset) | bit_mask;
+ msg.offset = offset;
+ status = pcr_execute_sideband_msg(PCH_DEV_P2SB, &msg, &data, &response);
+ if (status || response)
+ printk(BIOS_ERR, "Failed to lock GPIO PAD Tx state, response = %d\n",
+ response);
+ }
}
int gpio_lock_pads(const struct gpio_lock_config *pad_list, const size_t count)
{
const struct pad_community *comm;
- enum gpio_lock_action action;
- int status, err_response = 0;
- uint8_t response;
uint16_t offset;
size_t rel_pad;
- uint32_t data;
gpio_t pad;
if (!CONFIG(SOC_INTEL_COMMON_BLOCK_SMM_LOCK_GPIO_PADS))
@@ -492,29 +525,10 @@ int gpio_lock_pads(const struct gpio_lock_config *pad_list, const size_t count)
return -1;
}
- /* We must use the sideband interface in order to lock the pad. */
- struct pcr_sbi_msg msg = {
- .opcode = GPIO_LOCK_UNLOCK,
- .is_posted = false,
- .fast_byte_enable = 0xF,
- .bar = 0,
- .fid = 0,
- };
-
p2sb_unhide();
for (int x = 0; x < count; x++) {
- int err;
-
pad = pad_list[x].pad;
- action = pad_list[x].action;
-
- if (!(action & GPIO_LOCK_FULL)) {
- printk(BIOS_ERR, "%s: Error: no action specified for pad %d!\n",
- __func__, pad);
- continue;
- }
-
comm = gpio_get_community(pad);
rel_pad = relative_pad_in_comm(comm, pad);
offset = comm->pad_cfg_lock_offset;
@@ -527,47 +541,91 @@ int gpio_lock_pads(const struct gpio_lock_config *pad_list, const size_t count)
offset += gpio_group_index_scaled(comm, rel_pad, 2 * sizeof(uint32_t));
const uint32_t bit_mask = gpio_bitmask_within_group(comm, rel_pad);
- msg.pid = comm->port;
- msg.offset = offset;
- if ((action & GPIO_LOCK_CONFIG) == GPIO_LOCK_CONFIG) {
- if (CONFIG(DEBUG_GPIO))
- printk(BIOS_INFO, "%s: Locking pad %d configuration\n",
- __func__, pad);
- data = pcr_read32(msg.pid, msg.offset) | bit_mask;
- status = pcr_execute_sideband_msg(PCH_DEV_P2SB, &msg, &data, &response);
- if ((err = sideband_msg_err(status, response)) != 0) {
- err_response = err;
- continue;
- }
- }
-
- if ((action & GPIO_LOCK_TX) == GPIO_LOCK_TX) {
- if (CONFIG(DEBUG_GPIO))
- printk(BIOS_INFO, "%s: Locking pad %d TX state\n",
- __func__, pad);
- msg.offset += sizeof(uint32_t);
- data = pcr_read32(msg.pid, msg.offset) | bit_mask;
- status = pcr_execute_sideband_msg(PCH_DEV_P2SB, &msg, &data, &response);
- if ((err = sideband_msg_err(status, response)) != 0) {
- err_response = err;
- continue;
- }
- }
+ gpio_pad_config_lock_using_sbi(&pad_list[x], comm->port, offset, bit_mask);
}
p2sb_hide();
+}
+
+static void
+gpio_pad_config_lock_using_pcr(const struct gpio_lock_config *pad_info,
+ uint8_t pid, uint16_t offset, const uint32_t bit_mask)
+{
+ if ((pad_info->action & GPIO_LOCK_CONFIG) == GPIO_LOCK_CONFIG) {
+ if (CONFIG(DEBUG_GPIO))
+ printk(BIOS_INFO, "%s: Locking pad %d configuration\n",
+ __func__, pad_info->pad);
+ pcr_or32(pid, offset, bit_mask);
+ }
+
+ if ((pad_info->action & GPIO_LOCK_TX) == GPIO_LOCK_TX) {
+ if (CONFIG(DEBUG_GPIO))
+ printk(BIOS_INFO, "%s: Locking pad %d TX state\n",
+ __func__, pad_info->pad);
+ pcr_or32(pid, offset + sizeof(uint32_t), bit_mask);
+ }
+}
+
+static int gpio_non_smm_lock_pad(const struct gpio_lock_config *pad_info)
+{
+ const struct pad_community *comm = gpio_get_community(pad_info->pad);
+ uint16_t offset;
+ size_t rel_pad;
+
+ if (!pad_info) {
+ printk(BIOS_ERR, "%s: Error: pad_info is null!\n", __func__);
+ return -1;
+ }
+
+ if (cpu_soc_is_in_untrusted_mode()) {
+ printk(BIOS_ERR, "%s: Error: IA Untrusted Mode enabled, can't lock pad!\n",
+ __func__);
+ return -1;
+ }
+
+ rel_pad = relative_pad_in_comm(comm, pad_info->pad);
+ offset = comm->pad_cfg_lock_offset;
+ if (!offset) {
+ printk(BIOS_ERR, "%s: Error: offset not defined for pad %d!\n",
+ __func__, pad_info->pad);
+ return -1;
+ }
+
+ /* PADCFGLOCK and PADCFGLOCKTX registers for each community are contiguous */
+ offset += gpio_group_index_scaled(comm, rel_pad, 2 * sizeof(uint32_t));
+ const uint32_t bit_mask = gpio_bitmask_within_group(comm, rel_pad);
- return err_response;
+ if (CONFIG(SOC_INTEL_COMMON_BLOCK_GPIO_LOCK_USING_PCR)) {
+ if (CONFIG(DEBUG_GPIO))
+ printk(BIOS_INFO, "Locking pad configuration using PCR\n");
+ gpio_pad_config_lock_using_pcr(pad_info, comm->port, offset, bit_mask);
+ } else if (CONFIG(SOC_INTEL_COMMON_BLOCK_GPIO_LOCK_USING_SBI)) {
+ if (CONFIG(DEBUG_GPIO))
+ printk(BIOS_INFO, "Locking pad configuration using SBI\n");
+ gpio_pad_config_lock_using_sbi(pad_info, comm->port, offset, bit_mask);
+ } else {
+ printk(BIOS_ERR, "%s: Error: No pad configuration lock method is selected!\n",
+ __func__);
+ }
+
+ return 0;
}
int gpio_lock_pad(const gpio_t pad, enum gpio_lock_action action)
{
+ /* Skip locking GPIO PAD in early stages */
+ if (ENV_ROMSTAGE_OR_BEFORE)
+ return -1;
+
const struct gpio_lock_config pads = {
.pad = pad,
.action = action
};
+ if (!ENV_SMM && !CONFIG(SOC_INTEL_COMMON_BLOCK_SMM_LOCK_GPIO_PADS))
+ return gpio_non_smm_lock_pad(&pads);
+
return gpio_lock_pads(&pads, 1);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 07:51:24 +0000