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19fbdca47b
Add a CPU driver for the MPC83xx architecture. Signed-off-by: Mario Six <mario.six@gdsys.cc>
349 lines
7.8 KiB
C
349 lines
7.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2018
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* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
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*/
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#include <common.h>
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#include <bitfield.h>
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#include <clk.h>
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#include <cpu.h>
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#include <dm.h>
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#include "mpc83xx_cpu.h"
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/**
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* struct mpc83xx_cpu_priv - Private data for MPC83xx CPUs
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* @e300_type: The e300 core type of the MPC83xx CPU
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* @family: The MPC83xx family the CPU belongs to
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* @type: The MPC83xx type of the CPU
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* @is_e_processor: Flag indicating whether the CPU is a E processor or not
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* @is_a_variant: Flag indicating whtther the CPU is a A variant or not
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* @revid: The revision ID of the CPU
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* @revid.major: The major part of the CPU's revision ID
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* @revid.minor: The minor part of the CPU's revision ID
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*/
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struct mpc83xx_cpu_priv {
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enum e300_type e300_type;
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enum mpc83xx_cpu_family family;
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enum mpc83xx_cpu_type type;
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bool is_e_processor;
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bool is_a_variant;
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struct {
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uint major;
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uint minor;
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} revid;
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};
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int checkcpu(void)
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{
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/* Activate all CPUs from board_f.c */
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return cpu_probe_all();
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}
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/**
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* get_spridr() - Read SPRIDR (System Part and Revision ID Register) of CPU
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*
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* Return: The SPRIDR value
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*/
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static inline u32 get_spridr(void)
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{
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immap_t *immr = (immap_t *)CONFIG_SYS_IMMR;
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return in_be32(&immr->sysconf.spridr);
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}
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/**
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* determine_type() - Determine CPU family of MPC83xx device
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* @dev: CPU device from which to read CPU family from
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*/
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static inline void determine_family(struct udevice *dev)
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{
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struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
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/* Upper 12 bits of PARTID field (bits 0-23 in SPRIDR) */
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const u32 PARTID_FAMILY_MASK = 0xFFF00000;
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switch (bitfield_extract_by_mask(get_spridr(), PARTID_FAMILY_MASK)) {
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case 0x810:
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case 0x811:
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priv->family = FAMILY_830X;
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break;
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case 0x80B:
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priv->family = FAMILY_831X;
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break;
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case 0x806:
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priv->family = FAMILY_832X;
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break;
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case 0x803:
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priv->family = FAMILY_834X;
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break;
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case 0x804:
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priv->family = FAMILY_836X;
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break;
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case 0x80C:
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priv->family = FAMILY_837X;
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break;
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default:
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priv->family = FAMILY_UNKNOWN;
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}
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}
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/**
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* determine_type() - Determine CPU type of MPC83xx device
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* @dev: CPU device from which to read CPU type from
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*/
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static inline void determine_type(struct udevice *dev)
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{
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struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
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/* Upper 16 bits of PVR (Processor Version Register) */
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const u32 PCR_UPPER_MASK = 0xFFFF0000;
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u32 val;
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val = bitfield_extract_by_mask(get_spridr(), PCR_UPPER_MASK);
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/* Mask out E-variant bit */
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switch (val & 0xFFFE) {
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case 0x8100:
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priv->type = TYPE_8308;
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break;
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case 0x8110:
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priv->type = TYPE_8309;
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break;
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case 0x80B2:
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priv->type = TYPE_8311;
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break;
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case 0x80B0:
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priv->type = TYPE_8313;
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break;
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case 0x80B6:
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priv->type = TYPE_8314;
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break;
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case 0x80B4:
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priv->type = TYPE_8315;
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break;
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case 0x8066:
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priv->type = TYPE_8321;
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break;
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case 0x8062:
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priv->type = TYPE_8323;
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break;
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case 0x8036:
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priv->type = TYPE_8343;
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break;
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case 0x8032:
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priv->type = TYPE_8347_TBGA;
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break;
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case 0x8034:
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priv->type = TYPE_8347_PBGA;
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break;
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case 0x8030:
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priv->type = TYPE_8349;
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break;
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case 0x804A:
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priv->type = TYPE_8358_TBGA;
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break;
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case 0x804E:
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priv->type = TYPE_8358_PBGA;
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break;
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case 0x8048:
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priv->type = TYPE_8360;
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break;
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case 0x80C6:
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priv->type = TYPE_8377;
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break;
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case 0x80C4:
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priv->type = TYPE_8378;
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break;
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case 0x80C2:
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priv->type = TYPE_8379;
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break;
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default:
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priv->type = TYPE_UNKNOWN;
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}
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}
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/**
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* determine_e300_type() - Determine e300 core type of MPC83xx device
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* @dev: CPU device from which to read e300 core type from
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*/
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static inline void determine_e300_type(struct udevice *dev)
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{
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struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
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/* Upper 16 bits of PVR (Processor Version Register) */
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const u32 PCR_UPPER_MASK = 0xFFFF0000;
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u32 pvr = get_pvr();
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switch ((pvr & PCR_UPPER_MASK) >> 16) {
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case 0x8083:
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priv->e300_type = E300C1;
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break;
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case 0x8084:
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priv->e300_type = E300C2;
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break;
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case 0x8085:
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priv->e300_type = E300C3;
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break;
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case 0x8086:
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priv->e300_type = E300C4;
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break;
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default:
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priv->e300_type = E300_UNKNOWN;
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}
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}
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/**
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* determine_revid() - Determine revision ID of CPU device
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* @dev: CPU device from which to read revision ID
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*/
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static inline void determine_revid(struct udevice *dev)
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{
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struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
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u32 REVID_MAJOR_MASK;
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u32 REVID_MINOR_MASK;
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u32 spridr = get_spridr();
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if (priv->family == FAMILY_834X) {
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REVID_MAJOR_MASK = 0x0000FF00;
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REVID_MINOR_MASK = 0x000000FF;
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} else {
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REVID_MAJOR_MASK = 0x000000F0;
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REVID_MINOR_MASK = 0x0000000F;
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}
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priv->revid.major = bitfield_extract_by_mask(spridr, REVID_MAJOR_MASK);
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priv->revid.minor = bitfield_extract_by_mask(spridr, REVID_MINOR_MASK);
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}
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/**
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* determine_cpu_data() - Determine CPU information from hardware
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* @dev: CPU device from which to read information
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*/
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static void determine_cpu_data(struct udevice *dev)
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{
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struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
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const u32 E_FLAG_MASK = 0x00010000;
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u32 spridr = get_spridr();
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determine_family(dev);
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determine_type(dev);
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determine_e300_type(dev);
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determine_revid(dev);
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if ((priv->family == FAMILY_834X ||
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priv->family == FAMILY_836X) && priv->revid.major >= 2)
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priv->is_a_variant = true;
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priv->is_e_processor = !bitfield_extract_by_mask(spridr, E_FLAG_MASK);
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}
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static int mpc83xx_cpu_get_desc(struct udevice *dev, char *buf, int size)
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{
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struct mpc83xx_cpu_priv *priv = dev_get_priv(dev);
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struct clk core_clk;
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struct clk csb_clk;
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char core_freq[32];
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char csb_freq[32];
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int ret;
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ret = clk_get_by_index(dev, 0, &core_clk);
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if (ret) {
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debug("%s: Failed to get core clock (err = %d)\n",
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dev->name, ret);
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return ret;
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}
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ret = clk_get_by_index(dev, 1, &csb_clk);
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if (ret) {
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debug("%s: Failed to get CSB clock (err = %d)\n",
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dev->name, ret);
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return ret;
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}
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determine_cpu_data(dev);
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snprintf(buf, size,
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"CPU: %s, MPC%s%s%s, Rev: %d.%d at %s MHz, CSB: %s MHz\n",
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e300_names[priv->e300_type],
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cpu_type_names[priv->type],
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priv->is_e_processor ? "E" : "",
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priv->is_a_variant ? "A" : "",
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priv->revid.major,
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priv->revid.minor,
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strmhz(core_freq, clk_get_rate(&core_clk)),
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strmhz(csb_freq, clk_get_rate(&csb_clk)));
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return 0;
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}
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static int mpc83xx_cpu_get_info(struct udevice *dev, struct cpu_info *info)
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{
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struct clk clock;
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int ret;
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ulong freq;
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ret = clk_get_by_index(dev, 0, &clock);
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if (ret) {
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debug("%s: Failed to get core clock (err = %d)\n",
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dev->name, ret);
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return ret;
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}
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freq = clk_get_rate(&clock);
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if (!freq) {
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debug("%s: Core clock speed is zero\n", dev->name);
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return -EINVAL;
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}
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info->cpu_freq = freq;
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info->features = BIT(CPU_FEAT_L1_CACHE) | BIT(CPU_FEAT_MMU);
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return 0;
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}
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static int mpc83xx_cpu_get_count(struct udevice *dev)
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{
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/* We have one e300cX core */
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return 1;
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}
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static int mpc83xx_cpu_get_vendor(struct udevice *dev, char *buf, int size)
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{
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snprintf(buf, size, "NXP");
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return 0;
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}
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static const struct cpu_ops mpc83xx_cpu_ops = {
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.get_desc = mpc83xx_cpu_get_desc,
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.get_info = mpc83xx_cpu_get_info,
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.get_count = mpc83xx_cpu_get_count,
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.get_vendor = mpc83xx_cpu_get_vendor,
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};
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static int mpc83xx_cpu_probe(struct udevice *dev)
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{
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return 0;
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}
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static const struct udevice_id mpc83xx_cpu_ids[] = {
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{ .compatible = "fsl,mpc83xx", },
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{ .compatible = "fsl,mpc8308", },
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{ .compatible = "fsl,mpc8309", },
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{ .compatible = "fsl,mpc8313", },
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{ .compatible = "fsl,mpc8315", },
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{ .compatible = "fsl,mpc832x", },
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{ .compatible = "fsl,mpc8349", },
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{ .compatible = "fsl,mpc8360", },
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{ .compatible = "fsl,mpc8379", },
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{ /* sentinel */ }
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};
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U_BOOT_DRIVER(mpc83xx_cpu) = {
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.name = "mpc83xx_cpu",
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.id = UCLASS_CPU,
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.of_match = mpc83xx_cpu_ids,
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.probe = mpc83xx_cpu_probe,
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.priv_auto_alloc_size = sizeof(struct mpc83xx_cpu_priv),
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.ops = &mpc83xx_cpu_ops,
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.flags = DM_FLAG_PRE_RELOC,
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};
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