iosf.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <stdint.h>
#include <device/pci_ops.h>
#include <console/console.h>
#include <soc/iosf.h>
 
static inline void write_iosf_reg(int reg, uint32_t value)
{
        pci_s_write_config32(IOSF_PCI_DEV, reg, value);
}
 
static inline uint32_t read_iosf_reg(int reg)
{
        return pci_s_read_config32(IOSF_PCI_DEV, reg);
}
 
/* Common sequences for all the port accesses. */
static uint32_t iosf_read_port(uint32_t cr, int reg)
{
        cr |= IOSF_REG(reg) | IOSF_BYTE_EN;
        write_iosf_reg(MCRX_REG, IOSF_REG_UPPER(reg));
        write_iosf_reg(MCR_REG, cr);
        return read_iosf_reg(MDR_REG);
}
 
static void iosf_write_port(uint32_t cr, int reg, uint32_t val)
{
        cr |= IOSF_REG(reg) | IOSF_BYTE_EN;
        write_iosf_reg(MDR_REG, val);
        write_iosf_reg(MCRX_REG, IOSF_REG_UPPER(reg));
        write_iosf_reg(MCR_REG, cr);
}
 
#define IOSF_READ(port) \
        (IOSF_OPCODE(IOSF_OP_READ_##port) | IOSF_PORT(IOSF_PORT_##port))
#define IOSF_WRITE(port) \
        (IOSF_OPCODE(IOSF_OP_WRITE_##port) | IOSF_PORT(IOSF_PORT_##port))
 
uint32_t iosf_bunit_read(int reg)
{
        return iosf_read_port(IOSF_READ(BUNIT), reg);
}
 
void iosf_bunit_write(int reg, uint32_t val)
{
        iosf_write_port(IOSF_WRITE(BUNIT), reg, val);
}
 
uint32_t iosf_punit_read(int reg)
{
        return iosf_read_port(IOSF_READ(PMC), reg);
}
 
void iosf_punit_write(int reg, uint32_t val)
{
        iosf_write_port(IOSF_WRITE(PMC), reg, val);
}
 
uint32_t iosf_score_read(int reg)
{
        return iosf_read_port(IOSF_READ(SCORE), reg);
}
 
void iosf_score_write(int reg, uint32_t val)
{
        iosf_write_port(IOSF_WRITE(SCORE), reg, val);
}
 
uint32_t iosf_lpss_read(int reg)
{
        return iosf_read_port(IOSF_READ(LPSS), reg);
}
 
void iosf_lpss_write(int reg, uint32_t val)
{
        iosf_write_port(IOSF_WRITE(LPSS), reg, val);
}
 
uint32_t iosf_port58_read(int reg)
{
        return iosf_read_port(IOSF_READ(0x58), reg);
}
 
void iosf_port58_write(int reg, uint32_t val)
{
        iosf_write_port(IOSF_WRITE(0x58), reg, val);
}
 
uint32_t iosf_scc_read(int reg)
{
        return iosf_read_port(IOSF_READ(SCC), reg);
}
 
void iosf_scc_write(int reg, uint32_t val)
{
        iosf_write_port(IOSF_WRITE(SCC), reg, val);
}
 
uint32_t iosf_usbphy_read(int reg)
{
        return iosf_read_port(IOSF_READ(USBPHY), reg);
}
 
void iosf_usbphy_write(int reg, uint32_t val)
{
        iosf_write_port(IOSF_WRITE(USBPHY), reg, val);
}
 
#if ENV_RAMSTAGE
uint64_t reg_script_read_iosf(struct reg_script_context *ctx)
{
        const struct reg_script *step = ctx->step;
 
        /* Process the request */
        switch (step->id) {
        case IOSF_PORT_BUNIT:
                return iosf_bunit_read(step->reg);
        case IOSF_PORT_SCORE:
                return iosf_score_read(step->reg);
        case IOSF_PORT_LPSS:
                return iosf_lpss_read(step->reg);
        case IOSF_PORT_0x58:
                return iosf_port58_read(step->reg);
        case IOSF_PORT_SCC:
                return iosf_scc_read(step->reg);
        case IOSF_PORT_USBPHY:
                return iosf_usbphy_read(step->reg);
        default:
                printk(BIOS_DEBUG, "No read support for IOSF port 0x%x.\n",
                       step->id);
                break;
        }
        return 0;
}
 
void reg_script_write_iosf(struct reg_script_context *ctx)
{
        const struct reg_script *step = ctx->step;
 
        /* Process the request */
        switch (step->id) {
        case IOSF_PORT_BUNIT:
                iosf_bunit_write(step->reg, step->value);
                break;
        case IOSF_PORT_SCORE:
                iosf_score_write(step->reg, step->value);
                break;
        case IOSF_PORT_LPSS:
                iosf_lpss_write(step->reg, step->value);
                break;
        case IOSF_PORT_0x58:
                iosf_port58_write(step->reg, step->value);
                break;
        case IOSF_PORT_SCC:
                iosf_scc_write(step->reg, step->value);
                break;
        case IOSF_PORT_USBPHY:
                iosf_usbphy_write(step->reg, step->value);
                break;
        default:
                printk(BIOS_DEBUG, "No write support for IOSF port 0x%x.\n",
                       step->id);
                break;
        }
}
 
static const struct reg_script_bus_entry reg_script_bus_table = {
        REG_SCRIPT_TYPE_IOSF, reg_script_read_iosf, reg_script_write_iosf
};
 
REG_SCRIPT_BUS_ENTRY(reg_script_bus_table);
 
#endif  /* ENV_RAMSTAGE */