spi_debug.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <console/console.h>
#include <soc/spi.h>
 
const char *spi_opcode_name(int opcode)
{
        const char *op_name;
 
        switch (opcode) {
        default:
                op_name = "Unknown";
                break;
        case 1:
                op_name = "Write Status";
                break;
        case 2:
                op_name = "Page Program";
                break;
        case 3:
                op_name = "Read Data";
                break;
        case 5:
                op_name = "Read Status";
                break;
        case 6:
                op_name = "Write Data Enable";
                break;
        case 0x0b:
                op_name = "Fast Read";
                break;
        case 0x20:
                op_name = "Erase 4 KiB";
                break;
        case 0x50:
                op_name = "Write Status Enable";
                break;
        case 0x9f:
                op_name = "Read ID";
                break;
        case 0xd8:
                op_name = "Erase 64 KiB";
                break;
        }
        return op_name;
}
 
void spi_display(volatile struct flash_ctrlr *ctrlr)
{
        int index;
        int opcode;
        const char *op_name;
        int prefix;
        int status;
        int type;
 
        /* Display the prefixes */
        printk(BIOS_DEBUG, "Prefix Table\n");
        for (index = 0; index < 2; index++) {
                prefix = ctrlr->prefix[index];
                op_name = spi_opcode_name(prefix);
                printk(BIOS_DEBUG, "  %d: 0x%02x (%s)\n", index, prefix,
                        op_name);
        }
 
        /* Display the opcodes */
        printk(BIOS_DEBUG, "Opcode Menu\n");
        for (index = 0; index < 8; index++) {
                opcode = ctrlr->opmenu[index];
                type = (ctrlr->type >> (index << 1)) & 3;
                op_name = spi_opcode_name(opcode);
                printk(BIOS_DEBUG, "  %d: 0x%02x (%s), %s%s\n", index, opcode,
                        op_name,
                        (type & SPITYPE_PREFIX) ? "Write" : "Read",
                        (type & SPITYPE_ADDRESS) ? ", w/3 byte address" : "");
        }
 
        /* Display the BIOS base address */
        printk(BIOS_DEBUG, "0x%08x: BIOS Base Address\n", ctrlr->bbar);
 
        /* Display the protection ranges */
        printk(BIOS_DEBUG, "BIOS Protected Range Registers\n");
        for (index = 0; index < ARRAY_SIZE(ctrlr->pbr); index++) {
                status = ctrlr->pbr[index];
                printk(BIOS_DEBUG, "  %d: 0x%08x: 0x%08x - 0x%08x %s\n",
                        index, status,
                        0xff000000 | (0x1000000 - CONFIG_ROM_SIZE)
                                | ((status & SPIPBR_PRB) << SPIPBR_PRB_SHIFT),
                        0xff800fff | (0x1000000 - CONFIG_ROM_SIZE)
                                | (status & SPIPBR_PRL),
                        (status & SPIPBR_WPE) ? "Protected" : "Unprotected");
        }
 
        /* Display locked status */
        status = ctrlr->status;
        printk(BIOS_DEBUG, "0x%04x: SPISTS, Tables %s\n", status,
                (status & SPISTS_CLD) ? "Locked" : "Unlocked");
}