/*
 * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
 * Copyright (C) 2007-2009 PetaLogix
 * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License. See the file "COPYING" in the main directory of this archive
 * for more details.
 */

#include <linux/clk.h>
#include <linux/init.h>
#include <asm/cpuinfo.h>
#include <asm/pvr.h>

const struct cpu_ver_key cpu_ver_lookup[] = {
        /* These key value are as per MBV field in PVR0 */
        {"5.00.a", 0x01},
        {"5.00.b", 0x02},
        {"5.00.c", 0x03},
        {"6.00.a", 0x04},
        {"6.00.b", 0x06},
        {"7.00.a", 0x05},
        {"7.00.b", 0x07},
        {"7.10.a", 0x08},
        {"7.10.b", 0x09},
        {"7.10.c", 0x0a},
        {"7.10.d", 0x0b},
        {"7.20.a", 0x0c},
        {"7.20.b", 0x0d},
        {"7.20.c", 0x0e},
        {"7.20.d", 0x0f},
        {"7.30.a", 0x10},
        {"7.30.b", 0x11},
        {"8.00.a", 0x12},
        {"8.00.b", 0x13},
        {"8.10.a", 0x14},
        {"8.20.a", 0x15},
        {"8.20.b", 0x16},
        {"8.30.a", 0x17},
        {"8.40.a", 0x18},
        {"8.40.b", 0x19},
        {"8.50.a", 0x1a},
        {"8.50.b", 0x1c},
        {"8.50.c", 0x1e},
        {"9.0", 0x1b},
        {"9.1", 0x1d},
        {"9.2", 0x1f},
        {"9.3", 0x20},
        {"9.4", 0x21},
        {"9.5", 0x22},
        {"9.6", 0x23},
        {"10.0", 0x24},
        {"11.0", 0x25},
        {NULL, 0},
};

/*
 * FIXME Not sure if the actual key is defined by Xilinx in the PVR
 */
const struct family_string_key family_string_lookup[] = {
        {"virtex2", 0x4},
        {"virtex2pro", 0x5},
        {"spartan3", 0x6},
        {"virtex4", 0x7},
        {"virtex5", 0x8},
        {"spartan3e", 0x9},
        {"spartan3a", 0xa},
        {"spartan3an", 0xb},
        {"spartan3adsp", 0xc},
        {"spartan6", 0xd},
        {"virtex6", 0xe},
        {"virtex7", 0xf},
        /* FIXME There is no key code defined for spartan2 */
        {"spartan2", 0xf0},
        {"kintex7", 0x10},
        {"artix7", 0x11},
        {"zynq7000", 0x12},
        {"UltraScale Virtex", 0x13},
        {"UltraScale Kintex", 0x14},
        {"UltraScale+ Zynq", 0x15},
        {"UltraScale+ Virtex", 0x16},
        {"UltraScale+ Kintex", 0x17},
        {"Spartan7", 0x18},
        {NULL, 0},
};

struct cpuinfo cpuinfo;
static struct device_node *cpu;

void __init setup_cpuinfo(void)
{
        cpu = of_get_cpu_node(0, NULL);
        if (!cpu)
                pr_err("You don't have cpu or are missing cpu reg property!!!\n");

        pr_info("%s: initialising\n", __func__);

        switch (cpu_has_pvr()) {
        case 0:
                pr_warn("%s: No PVR support. Using static CPU info from FDT\n",
                        __func__);
                set_cpuinfo_static(&cpuinfo, cpu);
                break;
/* FIXME I found weird behavior with MB 7.00.a/b 7.10.a
 * please do not use FULL PVR with MMU */
        case 1:
                pr_info("%s: Using full CPU PVR support\n",
                        __func__);
                set_cpuinfo_static(&cpuinfo, cpu);
                set_cpuinfo_pvr_full(&cpuinfo, cpu);
                break;
        default:
                pr_warn("%s: Unsupported PVR setting\n", __func__);
                set_cpuinfo_static(&cpuinfo, cpu);
        }

        if (cpuinfo.mmu_privins)
                pr_warn("%s: Stream instructions enabled"
                        " - USERSPACE CAN LOCK THIS KERNEL!\n", __func__);

        of_node_put(cpu);
}

void __init setup_cpuinfo_clk(void)
{
        struct clk *clk;

        clk = of_clk_get(cpu, 0);
        if (IS_ERR(clk)) {
                pr_err("ERROR: CPU CCF input clock not found\n");
                /* take timebase-frequency from DTS */
                cpuinfo.cpu_clock_freq = fcpu(cpu, "timebase-frequency");
        } else {
                cpuinfo.cpu_clock_freq = clk_get_rate(clk);
        }

        if (!cpuinfo.cpu_clock_freq) {
                pr_err("ERROR: CPU clock frequency not setup\n");
                BUG();
        }
}