root/arch/arm/mach-dove/common.c
// SPDX-License-Identifier: GPL-2.0-only
/*
 * arch/arm/mach-dove/common.c
 *
 * Core functions for Marvell Dove 88AP510 System On Chip
 */

#include <linux/clk-provider.h>
#include <linux/dma-mapping.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/platform_data/dma-mv_xor.h>
#include <linux/platform_data/usb-ehci-orion.h>
#include <linux/platform_device.h>
#include <linux/soc/dove/pmu.h>
#include <asm/hardware/cache-tauros2.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
#include <plat/common.h>
#include <plat/irq.h>
#include <plat/time.h>
#include "bridge-regs.h"
#include "pm.h"
#include "common.h"

/* These can go away once Dove uses the mvebu-mbus DT binding */
#define DOVE_MBUS_PCIE0_MEM_TARGET    0x4
#define DOVE_MBUS_PCIE0_MEM_ATTR      0xe8
#define DOVE_MBUS_PCIE0_IO_TARGET     0x4
#define DOVE_MBUS_PCIE0_IO_ATTR       0xe0
#define DOVE_MBUS_PCIE1_MEM_TARGET    0x8
#define DOVE_MBUS_PCIE1_MEM_ATTR      0xe8
#define DOVE_MBUS_PCIE1_IO_TARGET     0x8
#define DOVE_MBUS_PCIE1_IO_ATTR       0xe0
#define DOVE_MBUS_CESA_TARGET         0x3
#define DOVE_MBUS_CESA_ATTR           0x1
#define DOVE_MBUS_BOOTROM_TARGET      0x1
#define DOVE_MBUS_BOOTROM_ATTR        0xfd
#define DOVE_MBUS_SCRATCHPAD_TARGET   0xd
#define DOVE_MBUS_SCRATCHPAD_ATTR     0x0

/*****************************************************************************
 * I/O Address Mapping
 ****************************************************************************/
static struct map_desc __maybe_unused dove_io_desc[] __initdata = {
        {
                .virtual        = (unsigned long) DOVE_SB_REGS_VIRT_BASE,
                .pfn            = __phys_to_pfn(DOVE_SB_REGS_PHYS_BASE),
                .length         = DOVE_SB_REGS_SIZE,
                .type           = MT_DEVICE,
        }, {
                .virtual        = (unsigned long) DOVE_NB_REGS_VIRT_BASE,
                .pfn            = __phys_to_pfn(DOVE_NB_REGS_PHYS_BASE),
                .length         = DOVE_NB_REGS_SIZE,
                .type           = MT_DEVICE,
        },
};

void __init dove_map_io(void)
{
        iotable_init(dove_io_desc, ARRAY_SIZE(dove_io_desc));
}

/*****************************************************************************
 * CLK tree
 ****************************************************************************/
static int dove_tclk;

static DEFINE_SPINLOCK(gating_lock);
static struct clk *tclk;

static struct clk __init *dove_register_gate(const char *name,
                                             const char *parent, u8 bit_idx)
{
        return clk_register_gate(NULL, name, parent, 0,
                                 (void __iomem *)CLOCK_GATING_CONTROL,
                                 bit_idx, 0, &gating_lock);
}

static void __init dove_clk_init(void)
{
        struct clk *usb0, *usb1, *sata, *pex0, *pex1, *sdio0, *sdio1;
        struct clk *nand, *camera, *i2s0, *i2s1, *crypto, *ac97, *pdma;
        struct clk *xor0, *xor1, *ge;

        tclk = clk_register_fixed_rate(NULL, "tclk", NULL, 0, dove_tclk);

        usb0 = dove_register_gate("usb0", "tclk", CLOCK_GATING_BIT_USB0);
        usb1 = dove_register_gate("usb1", "tclk", CLOCK_GATING_BIT_USB1);
        sata = dove_register_gate("sata", "tclk", CLOCK_GATING_BIT_SATA);
        pex0 = dove_register_gate("pex0", "tclk", CLOCK_GATING_BIT_PCIE0);
        pex1 = dove_register_gate("pex1", "tclk", CLOCK_GATING_BIT_PCIE1);
        sdio0 = dove_register_gate("sdio0", "tclk", CLOCK_GATING_BIT_SDIO0);
        sdio1 = dove_register_gate("sdio1", "tclk", CLOCK_GATING_BIT_SDIO1);
        nand = dove_register_gate("nand", "tclk", CLOCK_GATING_BIT_NAND);
        camera = dove_register_gate("camera", "tclk", CLOCK_GATING_BIT_CAMERA);
        i2s0 = dove_register_gate("i2s0", "tclk", CLOCK_GATING_BIT_I2S0);
        i2s1 = dove_register_gate("i2s1", "tclk", CLOCK_GATING_BIT_I2S1);
        crypto = dove_register_gate("crypto", "tclk", CLOCK_GATING_BIT_CRYPTO);
        ac97 = dove_register_gate("ac97", "tclk", CLOCK_GATING_BIT_AC97);
        pdma = dove_register_gate("pdma", "tclk", CLOCK_GATING_BIT_PDMA);
        xor0 = dove_register_gate("xor0", "tclk", CLOCK_GATING_BIT_XOR0);
        xor1 = dove_register_gate("xor1", "tclk", CLOCK_GATING_BIT_XOR1);
        dove_register_gate("gephy", "tclk", CLOCK_GATING_BIT_GIGA_PHY);
        ge = dove_register_gate("ge", "gephy", CLOCK_GATING_BIT_GBE);

        orion_clkdev_add(NULL, "orion_spi.0", tclk);
        orion_clkdev_add(NULL, "orion_spi.1", tclk);
        orion_clkdev_add(NULL, "orion_wdt", tclk);
        orion_clkdev_add(NULL, "mv64xxx_i2c.0", tclk);

        orion_clkdev_add(NULL, "orion-ehci.0", usb0);
        orion_clkdev_add(NULL, "orion-ehci.1", usb1);
        orion_clkdev_add(NULL, "mv643xx_eth_port.0", ge);
        orion_clkdev_add(NULL, "sata_mv.0", sata);
        orion_clkdev_add("0", "pcie", pex0);
        orion_clkdev_add("1", "pcie", pex1);
        orion_clkdev_add(NULL, "sdhci-dove.0", sdio0);
        orion_clkdev_add(NULL, "sdhci-dove.1", sdio1);
        orion_clkdev_add(NULL, "orion_nand", nand);
        orion_clkdev_add(NULL, "cafe1000-ccic.0", camera);
        orion_clkdev_add(NULL, "mvebu-audio.0", i2s0);
        orion_clkdev_add(NULL, "mvebu-audio.1", i2s1);
        orion_clkdev_add(NULL, "mv_crypto", crypto);
        orion_clkdev_add(NULL, "dove-ac97", ac97);
        orion_clkdev_add(NULL, "dove-pdma", pdma);
        orion_clkdev_add(NULL, MV_XOR_NAME ".0", xor0);
        orion_clkdev_add(NULL, MV_XOR_NAME ".1", xor1);
}

/*****************************************************************************
 * EHCI0
 ****************************************************************************/
void __init dove_ehci0_init(void)
{
        orion_ehci_init(DOVE_USB0_PHYS_BASE, IRQ_DOVE_USB0, EHCI_PHY_NA);
}

/*****************************************************************************
 * EHCI1
 ****************************************************************************/
void __init dove_ehci1_init(void)
{
        orion_ehci_1_init(DOVE_USB1_PHYS_BASE, IRQ_DOVE_USB1);
}

/*****************************************************************************
 * GE00
 ****************************************************************************/
void __init dove_ge00_init(struct mv643xx_eth_platform_data *eth_data)
{
        orion_ge00_init(eth_data, DOVE_GE00_PHYS_BASE,
                        IRQ_DOVE_GE00_SUM, IRQ_DOVE_GE00_ERR,
                        1600);
}

/*****************************************************************************
 * SoC RTC
 ****************************************************************************/
static void __init dove_rtc_init(void)
{
        orion_rtc_init(DOVE_RTC_PHYS_BASE, IRQ_DOVE_RTC);
}

/*****************************************************************************
 * SATA
 ****************************************************************************/
void __init dove_sata_init(struct mv_sata_platform_data *sata_data)
{
        orion_sata_init(sata_data, DOVE_SATA_PHYS_BASE, IRQ_DOVE_SATA);

}

/*****************************************************************************
 * UART0
 ****************************************************************************/
void __init dove_uart0_init(void)
{
        orion_uart0_init(DOVE_UART0_VIRT_BASE, DOVE_UART0_PHYS_BASE,
                         IRQ_DOVE_UART_0, tclk);
}

/*****************************************************************************
 * UART1
 ****************************************************************************/
void __init dove_uart1_init(void)
{
        orion_uart1_init(DOVE_UART1_VIRT_BASE, DOVE_UART1_PHYS_BASE,
                         IRQ_DOVE_UART_1, tclk);
}

/*****************************************************************************
 * UART2
 ****************************************************************************/
void __init dove_uart2_init(void)
{
        orion_uart2_init(DOVE_UART2_VIRT_BASE, DOVE_UART2_PHYS_BASE,
                         IRQ_DOVE_UART_2, tclk);
}

/*****************************************************************************
 * UART3
 ****************************************************************************/
void __init dove_uart3_init(void)
{
        orion_uart3_init(DOVE_UART3_VIRT_BASE, DOVE_UART3_PHYS_BASE,
                         IRQ_DOVE_UART_3, tclk);
}

/*****************************************************************************
 * SPI
 ****************************************************************************/
void __init dove_spi0_init(void)
{
        orion_spi_init(DOVE_SPI0_PHYS_BASE);
}

void __init dove_spi1_init(void)
{
        orion_spi_1_init(DOVE_SPI1_PHYS_BASE);
}

/*****************************************************************************
 * I2C
 ****************************************************************************/
void __init dove_i2c_init(void)
{
        orion_i2c_init(DOVE_I2C_PHYS_BASE, IRQ_DOVE_I2C, 10);
}

/*****************************************************************************
 * Time handling
 ****************************************************************************/
void __init dove_init_early(void)
{
        orion_time_set_base(TIMER_VIRT_BASE);
        mvebu_mbus_init("marvell,dove-mbus",
                        BRIDGE_WINS_BASE, BRIDGE_WINS_SZ,
                        DOVE_MC_WINS_BASE, DOVE_MC_WINS_SZ);
}

static int __init dove_find_tclk(void)
{
        return 166666667;
}

void __init dove_timer_init(void)
{
        dove_tclk = dove_find_tclk();
        orion_time_init(BRIDGE_VIRT_BASE, BRIDGE_INT_TIMER1_CLR,
                        IRQ_DOVE_BRIDGE, dove_tclk);
}

/*****************************************************************************
 * XOR 0
 ****************************************************************************/
static void __init dove_xor0_init(void)
{
        orion_xor0_init(DOVE_XOR0_PHYS_BASE, DOVE_XOR0_HIGH_PHYS_BASE,
                        IRQ_DOVE_XOR_00, IRQ_DOVE_XOR_01);
}

/*****************************************************************************
 * XOR 1
 ****************************************************************************/
static void __init dove_xor1_init(void)
{
        orion_xor1_init(DOVE_XOR1_PHYS_BASE, DOVE_XOR1_HIGH_PHYS_BASE,
                        IRQ_DOVE_XOR_10, IRQ_DOVE_XOR_11);
}

/*****************************************************************************
 * SDIO
 ****************************************************************************/
static u64 sdio_dmamask = DMA_BIT_MASK(32);

static struct resource dove_sdio0_resources[] = {
        {
                .start  = DOVE_SDIO0_PHYS_BASE,
                .end    = DOVE_SDIO0_PHYS_BASE + 0xff,
                .flags  = IORESOURCE_MEM,
        }, {
                .start  = IRQ_DOVE_SDIO0,
                .end    = IRQ_DOVE_SDIO0,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct platform_device dove_sdio0 = {
        .name           = "sdhci-dove",
        .id             = 0,
        .dev            = {
                .dma_mask               = &sdio_dmamask,
                .coherent_dma_mask      = DMA_BIT_MASK(32),
        },
        .resource       = dove_sdio0_resources,
        .num_resources  = ARRAY_SIZE(dove_sdio0_resources),
};

void __init dove_sdio0_init(void)
{
        platform_device_register(&dove_sdio0);
}

static struct resource dove_sdio1_resources[] = {
        {
                .start  = DOVE_SDIO1_PHYS_BASE,
                .end    = DOVE_SDIO1_PHYS_BASE + 0xff,
                .flags  = IORESOURCE_MEM,
        }, {
                .start  = IRQ_DOVE_SDIO1,
                .end    = IRQ_DOVE_SDIO1,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct platform_device dove_sdio1 = {
        .name           = "sdhci-dove",
        .id             = 1,
        .dev            = {
                .dma_mask               = &sdio_dmamask,
                .coherent_dma_mask      = DMA_BIT_MASK(32),
        },
        .resource       = dove_sdio1_resources,
        .num_resources  = ARRAY_SIZE(dove_sdio1_resources),
};

void __init dove_sdio1_init(void)
{
        platform_device_register(&dove_sdio1);
}

void __init dove_setup_cpu_wins(void)
{
        /*
         * The PCIe windows will no longer be statically allocated
         * here once Dove is migrated to the pci-mvebu driver. The
         * non-PCIe windows will no longer be created here once Dove
         * fully moves to DT.
         */
        mvebu_mbus_add_window_remap_by_id(DOVE_MBUS_PCIE0_IO_TARGET,
                                          DOVE_MBUS_PCIE0_IO_ATTR,
                                          DOVE_PCIE0_IO_PHYS_BASE,
                                          DOVE_PCIE0_IO_SIZE,
                                          DOVE_PCIE0_IO_BUS_BASE);
        mvebu_mbus_add_window_remap_by_id(DOVE_MBUS_PCIE1_IO_TARGET,
                                          DOVE_MBUS_PCIE1_IO_ATTR,
                                          DOVE_PCIE1_IO_PHYS_BASE,
                                          DOVE_PCIE1_IO_SIZE,
                                          DOVE_PCIE1_IO_BUS_BASE);
        mvebu_mbus_add_window_by_id(DOVE_MBUS_PCIE0_MEM_TARGET,
                                    DOVE_MBUS_PCIE0_MEM_ATTR,
                                    DOVE_PCIE0_MEM_PHYS_BASE,
                                    DOVE_PCIE0_MEM_SIZE);
        mvebu_mbus_add_window_by_id(DOVE_MBUS_PCIE1_MEM_TARGET,
                                    DOVE_MBUS_PCIE1_MEM_ATTR,
                                    DOVE_PCIE1_MEM_PHYS_BASE,
                                    DOVE_PCIE1_MEM_SIZE);
        mvebu_mbus_add_window_by_id(DOVE_MBUS_CESA_TARGET,
                                    DOVE_MBUS_CESA_ATTR,
                                    DOVE_CESA_PHYS_BASE,
                                    DOVE_CESA_SIZE);
        mvebu_mbus_add_window_by_id(DOVE_MBUS_BOOTROM_TARGET,
                                    DOVE_MBUS_BOOTROM_ATTR,
                                    DOVE_BOOTROM_PHYS_BASE,
                                    DOVE_BOOTROM_SIZE);
        mvebu_mbus_add_window_by_id(DOVE_MBUS_SCRATCHPAD_TARGET,
                                    DOVE_MBUS_SCRATCHPAD_ATTR,
                                    DOVE_SCRATCHPAD_PHYS_BASE,
                                    DOVE_SCRATCHPAD_SIZE);
}

static struct resource orion_wdt_resource[] = {
                DEFINE_RES_MEM(TIMER_PHYS_BASE, 0x04),
                DEFINE_RES_MEM(RSTOUTn_MASK_PHYS, 0x04),
};

static struct platform_device orion_wdt_device = {
        .name           = "orion_wdt",
        .id             = -1,
        .num_resources  = ARRAY_SIZE(orion_wdt_resource),
        .resource       = orion_wdt_resource,
};

static void __init __maybe_unused orion_wdt_init(void)
{
        platform_device_register(&orion_wdt_device);
}

static const struct dove_pmu_domain_initdata pmu_domains[] __initconst = {
        {
                .pwr_mask = PMU_PWR_VPU_PWR_DWN_MASK,
                .rst_mask = PMU_SW_RST_VIDEO_MASK,
                .iso_mask = PMU_ISO_VIDEO_MASK,
                .name = "vpu-domain",
        }, {
                .pwr_mask = PMU_PWR_GPU_PWR_DWN_MASK,
                .rst_mask = PMU_SW_RST_GPU_MASK,
                .iso_mask = PMU_ISO_GPU_MASK,
                .name = "gpu-domain",
        }, {
                /* sentinel */
        },
};

static const struct dove_pmu_initdata pmu_data __initconst = {
        .pmc_base = DOVE_PMU_VIRT_BASE,
        .pmu_base = DOVE_PMU_VIRT_BASE + 0x8000,
        .irq = IRQ_DOVE_PMU,
        .irq_domain_start = IRQ_DOVE_PMU_START,
        .domains = pmu_domains,
};

void __init dove_init(void)
{
        pr_info("Dove 88AP510 SoC, TCLK = %d MHz.\n",
                (dove_tclk + 499999) / 1000000);

#ifdef CONFIG_CACHE_TAUROS2
        tauros2_init(0);
#endif
        dove_setup_cpu_wins();

        /* Setup root of clk tree */
        dove_clk_init();

        /* internal devices that every board has */
        dove_init_pmu_legacy(&pmu_data);
        dove_rtc_init();
        dove_xor0_init();
        dove_xor1_init();
}

void dove_restart(enum reboot_mode mode, const char *cmd)
{
        /*
         * Enable soft reset to assert RSTOUTn.
         */
        writel(SOFT_RESET_OUT_EN, RSTOUTn_MASK);

        /*
         * Assert soft reset.
         */
        writel(SOFT_RESET, SYSTEM_SOFT_RESET);

        while (1)
                ;
}