// SPDX-License-Identifier: GPL-2.0
/*
 * Renesas Technology Sales RTS7751R2D Support.
 *
 * Copyright (C) 2002 - 2006 Atom Create Engineering Co., Ltd.
 * Copyright (C) 2004 - 2007 Paul Mundt
 */
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/ata_platform.h>
#include <linux/sm501.h>
#include <linux/sm501-regs.h>
#include <linux/pm.h>
#include <linux/fb.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi_bitbang.h>
#include <asm/machvec.h>
#include <mach/r2d.h>
#include <asm/io.h>
#include <asm/io_trapped.h>
#include <asm/spi.h>

static struct resource cf_ide_resources[] = {
        [0] = {
                .start  = PA_AREA5_IO + 0x1000,
                .end    = PA_AREA5_IO + 0x1000 + 0x10 - 0x2,
                .flags  = IORESOURCE_MEM,
        },
        [1] = {
                .start  = PA_AREA5_IO + 0x80c,
                .end    = PA_AREA5_IO + 0x80c,
                .flags  = IORESOURCE_MEM,
        },
#ifndef CONFIG_RTS7751R2D_1 /* For R2D-1 polling is preferred */
        [2] = {
                .start  = IRQ_CF_IDE,
                .flags  = IORESOURCE_IRQ,
        },
#endif
};

static struct pata_platform_info pata_info = {
        .ioport_shift   = 1,
};

static struct platform_device cf_ide_device  = {
        .name           = "pata_platform",
        .id             = -1,
        .num_resources  = ARRAY_SIZE(cf_ide_resources),
        .resource       = cf_ide_resources,
        .dev    = {
                .platform_data  = &pata_info,
        },
};

static struct spi_board_info spi_bus[] = {
        {
                .modalias       = "rtc-r9701",
                .max_speed_hz   = 1000000,
                .mode           = SPI_MODE_3,
        },
};

static void r2d_chip_select(struct sh_spi_info *spi, int cs, int state)
{
        BUG_ON(cs != 0);  /* Single Epson RTC-9701JE attached on CS0 */
        __raw_writew(state == BITBANG_CS_ACTIVE, PA_RTCCE);
}

static struct sh_spi_info spi_info = {
        .num_chipselect = 1,
        .chip_select = r2d_chip_select,
};

static struct resource spi_sh_sci_resources[] = {
        {
                .start  = 0xffe00000,
                .end    = 0xffe0001f,
                .flags  = IORESOURCE_MEM,
        },
};

static struct platform_device spi_sh_sci_device  = {
        .name           = "spi_sh_sci",
        .id             = -1,
        .num_resources  = ARRAY_SIZE(spi_sh_sci_resources),
        .resource       = spi_sh_sci_resources,
        .dev    = {
                .platform_data  = &spi_info,
        },
};

static struct resource heartbeat_resources[] = {
        [0] = {
                .start  = PA_OUTPORT,
                .end    = PA_OUTPORT,
                .flags  = IORESOURCE_MEM,
        },
};

static struct platform_device heartbeat_device = {
        .name           = "heartbeat",
        .id             = -1,
        .num_resources  = ARRAY_SIZE(heartbeat_resources),
        .resource       = heartbeat_resources,
};

static struct resource sm501_resources[] = {
        [0]     = {
                .start  = 0x10000000,
                .end    = 0x13e00000 - 1,
                .flags  = IORESOURCE_MEM,
        },
        [1]     = {
                .start  = 0x13e00000,
                .end    = 0x13ffffff,
                .flags  = IORESOURCE_MEM,
        },
        [2]     = {
                .start  = IRQ_VOYAGER,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct fb_videomode sm501_default_mode = {
        .pixclock       = 35714,
        .xres           = 640,
        .yres           = 480,
        .left_margin    = 105,
        .right_margin   = 50,
        .upper_margin   = 35,
        .lower_margin   = 0,
        .hsync_len      = 96,
        .vsync_len      = 2,
        .sync = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
};

static struct sm501_platdata_fbsub sm501_pdata_fbsub_pnl = {
        .def_bpp        = 16,
        .def_mode       = &sm501_default_mode,
        .flags          = SM501FB_FLAG_USE_INIT_MODE |
                          SM501FB_FLAG_USE_HWCURSOR |
                          SM501FB_FLAG_USE_HWACCEL |
                          SM501FB_FLAG_DISABLE_AT_EXIT,
};

static struct sm501_platdata_fbsub sm501_pdata_fbsub_crt = {
        .flags          = (SM501FB_FLAG_USE_INIT_MODE |
                           SM501FB_FLAG_USE_HWCURSOR |
                           SM501FB_FLAG_USE_HWACCEL |
                           SM501FB_FLAG_DISABLE_AT_EXIT),

};

static struct sm501_platdata_fb sm501_fb_pdata = {
        .fb_route       = SM501_FB_OWN,
        .fb_crt         = &sm501_pdata_fbsub_crt,
        .fb_pnl         = &sm501_pdata_fbsub_pnl,
        .flags          = SM501_FBPD_SWAP_FB_ENDIAN,
};

static struct sm501_initdata sm501_initdata = {
        .devices        = SM501_USE_USB_HOST | SM501_USE_UART0,
};

static struct sm501_platdata sm501_platform_data = {
        .init           = &sm501_initdata,
        .fb             = &sm501_fb_pdata,
};

static struct platform_device sm501_device = {
        .name           = "sm501",
        .id             = -1,
        .dev            = {
                .platform_data  = &sm501_platform_data,
        },
        .num_resources  = ARRAY_SIZE(sm501_resources),
        .resource       = sm501_resources,
};

static struct mtd_partition r2d_partitions[] = {
        {
                .name           = "U-Boot",
                .offset         = 0x00000000,
                .size           = 0x00040000,
                .mask_flags     = MTD_WRITEABLE,
        }, {
                .name           = "Environment",
                .offset         = MTDPART_OFS_NXTBLK,
                .size           = 0x00040000,
                .mask_flags     = MTD_WRITEABLE,
        }, {
                .name           = "Kernel",
                .offset         = MTDPART_OFS_NXTBLK,
                .size           = 0x001c0000,
        }, {
                .name           = "Flash_FS",
                .offset         = MTDPART_OFS_NXTBLK,
                .size           = MTDPART_SIZ_FULL,
        }
};

static struct physmap_flash_data flash_data = {
        .width          = 2,
        .nr_parts       = ARRAY_SIZE(r2d_partitions),
        .parts          = r2d_partitions,
};

static struct resource flash_resource = {
        .start          = 0x00000000,
        .end            = 0x02000000,
        .flags          = IORESOURCE_MEM,
};

static struct platform_device flash_device = {
        .name           = "physmap-flash",
        .id             = -1,
        .resource       = &flash_resource,
        .num_resources  = 1,
        .dev            = {
                .platform_data = &flash_data,
        },
};

static struct platform_device *rts7751r2d_devices[] __initdata = {
        &sm501_device,
        &heartbeat_device,
        &spi_sh_sci_device,
};

/*
 * The CF is connected with a 16-bit bus where 8-bit operations are
 * unsupported. The linux ata driver is however using 8-bit operations, so
 * insert a trapped io filter to convert 8-bit operations into 16-bit.
 */
static struct trapped_io cf_trapped_io = {
        .resource               = cf_ide_resources,
        .num_resources          = 2,
        .minimum_bus_width      = 16,
};

static int __init rts7751r2d_devices_setup(void)
{
        if (register_trapped_io(&cf_trapped_io) == 0)
                platform_device_register(&cf_ide_device);

        if (mach_is_r2d_plus())
                platform_device_register(&flash_device);

        spi_register_board_info(spi_bus, ARRAY_SIZE(spi_bus));

        return platform_add_devices(rts7751r2d_devices,
                                    ARRAY_SIZE(rts7751r2d_devices));
}
device_initcall(rts7751r2d_devices_setup);

static void rts7751r2d_power_off(void)
{
        __raw_writew(0x0001, PA_POWOFF);
}

/*
 * Initialize the board
 */
static void __init rts7751r2d_setup(char **cmdline_p)
{
        void __iomem *sm501_reg;
        u16 ver = __raw_readw(PA_VERREG);

        printk(KERN_INFO "Renesas Technology Sales RTS7751R2D support.\n");

        printk(KERN_INFO "FPGA version:%d (revision:%d)\n",
                                        (ver >> 4) & 0xf, ver & 0xf);

        __raw_writew(0x0000, PA_OUTPORT);
        pm_power_off = rts7751r2d_power_off;

        /* sm501 dram configuration:
         * ColSizeX = 11 - External Memory Column Size: 256 words.
         * APX = 1 - External Memory Active to Pre-Charge Delay: 7 clocks.
         * RstX = 1 - External Memory Reset: Normal.
         * Rfsh = 1 - Local Memory Refresh to Command Delay: 12 clocks.
         * BwC =  1 - Local Memory Block Write Cycle Time: 2 clocks.
         * BwP =  1 - Local Memory Block Write to Pre-Charge Delay: 1 clock.
         * AP = 1 - Internal Memory Active to Pre-Charge Delay: 7 clocks.
         * Rst = 1 - Internal Memory Reset: Normal.
         * RA = 1 - Internal Memory Remain in Active State: Do not remain.
         */

        sm501_reg = (void __iomem *)0xb3e00000 + SM501_DRAM_CONTROL;
        writel(readl(sm501_reg) | 0x00f107c0, sm501_reg);
}

/*
 * The Machine Vector
 */
static struct sh_machine_vector mv_rts7751r2d __initmv = {
        .mv_name                = "RTS7751R2D",
        .mv_setup               = rts7751r2d_setup,
        .mv_init_irq            = init_rts7751r2d_IRQ,
        .mv_irq_demux           = rts7751r2d_irq_demux,
};