diff options
Diffstat (limited to 'src/soc/amd/picasso/smu.c')
| -rw-r--r-- | src/soc/amd/picasso/smu.c | 78 |
1 files changed, 2 insertions, 76 deletions
diff --git a/src/soc/amd/picasso/smu.c b/src/soc/amd/picasso/smu.c index 4a373ce273..1496957117 100644 --- a/src/soc/amd/picasso/smu.c +++ b/src/soc/amd/picasso/smu.c @@ -1,86 +1,12 @@ /* SPDX-License-Identifier: GPL-2.0-only */ -#include <timer.h> #include <console/console.h> -#include <device/pci_ops.h> -#include <soc/pci_devs.h> +#include <amdblocks/smu.h> #include <soc/smu.h> -#include <types.h> - -static uint32_t smu_read32(uint32_t reg) -{ - pci_write_config32(SOC_GNB_DEV, SMU_INDEX_ADDR, reg); - return pci_read_config32(SOC_GNB_DEV, SMU_DATA_ADDR); -} - -static void smu_write32(uint32_t reg, uint32_t val) -{ - pci_write_config32(SOC_GNB_DEV, SMU_INDEX_ADDR, reg); - pci_write_config32(SOC_GNB_DEV, SMU_DATA_ADDR, val); -} - -#define SMU_MESG_RESP_TIMEOUT 0x00 -#define SMU_MESG_RESP_OK 0x01 - -/* returns SMU_MESG_RESP_OK, SMU_MESG_RESP_TIMEOUT or a negative number */ -static int32_t smu_poll_response(bool print_command_duration) -{ - struct stopwatch sw; - const long timeout_ms = 10 * MSECS_PER_SEC; - int32_t result; - - stopwatch_init_msecs_expire(&sw, timeout_ms); - - do { - result = smu_read32(REG_ADDR_MESG_RESP); - if (result) { - if (print_command_duration) - printk(BIOS_SPEW, "SMU command consumed %ld usecs\n", - stopwatch_duration_usecs(&sw)); - return result; - } - } while (!stopwatch_expired(&sw)); - - printk(BIOS_ERR, "Error: timeout sending SMU message\n"); - return SMU_MESG_RESP_TIMEOUT; -} - -/* - * Send a message and bi-directional payload to the SMU. SMU response, if any, is returned via - * arg. - */ -enum cb_err send_smu_message(enum smu_message_id id, struct smu_payload *arg) -{ - size_t i; - - /* wait until SMU can process a new request; don't care if an old request failed */ - if (smu_poll_response(false) == SMU_MESG_RESP_TIMEOUT) - return CB_ERR; - - /* clear response register */ - smu_write32(REG_ADDR_MESG_RESP, 0); - - /* populate arguments */ - for (i = 0 ; i < SMU_NUM_ARGS ; i++) - smu_write32(REG_ADDR_MESG_ARG(i), arg->msg[i]); - - /* send message to SMU */ - smu_write32(REG_ADDR_MESG_ID, id); - - /* wait until SMU has processed the message and check if it was successful */ - if (smu_poll_response(true) != SMU_MESG_RESP_OK) - return CB_ERR; - - /* copy returned values */ - for (i = 0 ; i < SMU_NUM_ARGS ; i++) - arg->msg[i] = smu_read32(REG_ADDR_MESG_ARG(i)); - - return CB_SUCCESS; -} /* * Request the SMU to put system into S3, S4, or S5. On entry, SlpTyp determines S-State and - * SlpTypeEn is clear. Function does not return if successful. + * SlpTypeEn gets set by the SMU. Function does not return if successful. */ void smu_sx_entry(void) { |