gc2: es: Implement GPIO Get/Set config OEM IPMI commands

[pabloyangWW]

[Task Description]
This patch implements two OEM IPMI commands (OEM_1S_GET_GPIO_CONFIG, OEM_1S_SET_GPIO_CONFIG) for GPIO configuration and control on the BIC. These commands are defined as weak functions in common code and overridden by platform-specific implementations in gc2.

[Motivation]
BMC needs to dynamically query and control BIC GPIO configurations for system management and debugging purposes. The bic_util tool on BMC requires IPMI interface to access BIC GPIOs without firmware modification. This implementation provides standardized OEM commands to fulfill two requirements by overriding the weak function stubs in common code with actual platform-specific implementations.

[Design]

1. Implemented OEM_1S_GET_GPIO_CONFIG (NetFn: 0x38, CMD: 0x5):

• Input: GPIO bitmap indicating which GPIOs to query
• Output: Configuration bytes for each selected GPIO containing:
  • Direction (input/output)
  • Interrupt enable status * Trigger type (edge/level) * Trigger polarity (rising/falling/both or high/low)

2. Implemented OEM_1S_SET_GPIO_CONFIG (NetFn: 0x38, CMD: 0x6):
   • Input: GPIO bitmap + configuration bytes for each selected GPIO
   • Configures GPIO direction and interrupt settings per configuration byte
   • byte format:
   • bit[0]: Direction (0: input, 1: output)
   • bit[1]: Interrupt enable (0: disable, 1: enable)
   • bit[2]: Trigger type (0: edge, 1: level)
   • bit[3]: Edge polarity (0: falling, 1: rising)
   • bit[4]: Both edge trigger (1: both edge)

[Test Log]

• All implemented commands respond with correct IPMI completion codes and data formats as per specification.
• Tested on GC2 platform using bic_util tool:

1. Get GPIO configuration:

• Successfully retrieved GPIO configuration for all GPIOs Output shows direction, interrupt enable, and trigger settings root@bmc-oob:~# bic_util slot1 --get_gpio_config gpio_config for pin#0 (FM_BMC_PCH_SCI_LPC_R_N): Direction: Input, Interrupt: Disabled, Trigger: Edge Trigger, Edge: Falling Edge gpio_config for pin#1 (FM_BIOS_POST_CMPLT_BMC_N): Direction: Input, Interrupt: Enabled, Trigger: Edge Trigger, Edge: Both Edges gpio_config for pin#2 (FM_SLPS3_PLD_N): Direction: Input, Interrupt: Enabled, Trigger: Edge Trigger, Edge: Both Edges ... gpio_config for pin#69 (SGPIO_BMC_CLK_R): Direction: Input, Interrupt: Disabled, Trigger: Edge Trigger, Edge: Falling Edge gpio_config for pin#70 (SGPIO_BMC_LD_R_N): Direction: Input, Interrupt: Disabled, Trigger: Edge Trigger, Edge: Falling Edge gpio_config for pin#71 (SGPIO_BMC_DOUT_R): Direction: Input, Interrupt: Enabled, Trigger: Edge Trigger, Edge: Falling Edge gpio_config for pin#72 (SGPIO_BMC_DIN): Direction: Input, Interrupt: Enabled, Trigger: Edge Trigger, Edge: Falling Edge

2. Set GPIO configuration:

• GPIO 52 set config with {Input, Enable Interrupt, Edge type, Both Edges} root@bmc-oob:~# bic-util server --get_gpio_config ... gpio_config for pin#52 (BMC_JTAG_SEL_R): Direction: Output, Interrupt: Disabled, Trigger: Edge Trigger, Edge: Falling Edge ... root@bmc-oob:~# bic-util server --set_gpio_config 52 0x12 Setting GPIO [52]BMC_JTAG_SEL_R config to 0x12 root@bmc-oob:~# bic-util server --get_gpio_config ... gpio_config for pin#52 (BMC_JTAG_SEL_R): Direction: Input, Interrupt: Enabled, Trigger: Edge Trigger, Edge: Both Edges ... ```

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