/* SPDX-License-Identifier: GPL-2.0 */
/*
 * For License see notice in hfc_multi.c
 *
 * special IO and init functions for the embedded XHFC board
 * from Speech Design
 *
 */

#include <asm/cpm1.h>

/* Change this to the value used by your board */
#ifndef IMAP_ADDR
#define IMAP_ADDR       0xFFF00000
#endif

static void
#ifdef HFC_REGISTER_DEBUG
HFC_outb_embsd(struct hfc_multi *hc, u_char reg, u_char val,
               const char *function, int line)
#else
        HFC_outb_embsd(struct hfc_multi *hc, u_char reg, u_char val)
#endif
{
        hc->immap->im_ioport.iop_padat |= PA_XHFC_A0;
        writeb(reg, hc->xhfc_memaddr);
        hc->immap->im_ioport.iop_padat &= ~(PA_XHFC_A0);
        writeb(val, hc->xhfc_memdata);
}
static u_char
#ifdef HFC_REGISTER_DEBUG
HFC_inb_embsd(struct hfc_multi *hc, u_char reg, const char *function, int line)
#else
        HFC_inb_embsd(struct hfc_multi *hc, u_char reg)
#endif
{
        hc->immap->im_ioport.iop_padat |= PA_XHFC_A0;
        writeb(reg, hc->xhfc_memaddr);
        hc->immap->im_ioport.iop_padat &= ~(PA_XHFC_A0);
        return readb(hc->xhfc_memdata);
}
static u_short
#ifdef HFC_REGISTER_DEBUG
HFC_inw_embsd(struct hfc_multi *hc, u_char reg, const char *function, int line)
#else
        HFC_inw_embsd(struct hfc_multi *hc, u_char reg)
#endif
{
        hc->immap->im_ioport.iop_padat |= PA_XHFC_A0;
        writeb(reg, hc->xhfc_memaddr);
        hc->immap->im_ioport.iop_padat &= ~(PA_XHFC_A0);
        return readb(hc->xhfc_memdata);
}
static void
#ifdef HFC_REGISTER_DEBUG
HFC_wait_embsd(struct hfc_multi *hc, const char *function, int line)
#else
        HFC_wait_embsd(struct hfc_multi *hc)
#endif
{
        hc->immap->im_ioport.iop_padat |= PA_XHFC_A0;
        writeb(R_STATUS, hc->xhfc_memaddr);
        hc->immap->im_ioport.iop_padat &= ~(PA_XHFC_A0);
        while (readb(hc->xhfc_memdata) & V_BUSY)
                cpu_relax();
}

/* write fifo data (EMBSD) */
void
write_fifo_embsd(struct hfc_multi *hc, u_char *data, int len)
{
        hc->immap->im_ioport.iop_padat |= PA_XHFC_A0;
        *hc->xhfc_memaddr = A_FIFO_DATA0;
        hc->immap->im_ioport.iop_padat &= ~(PA_XHFC_A0);
        while (len) {
                *hc->xhfc_memdata = *data;
                data++;
                len--;
        }
}

/* read fifo data (EMBSD) */
void
read_fifo_embsd(struct hfc_multi *hc, u_char *data, int len)
{
        hc->immap->im_ioport.iop_padat |= PA_XHFC_A0;
        *hc->xhfc_memaddr = A_FIFO_DATA0;
        hc->immap->im_ioport.iop_padat &= ~(PA_XHFC_A0);
        while (len) {
                *data = (u_char)(*hc->xhfc_memdata);
                data++;
                len--;
        }
}

static int
setup_embedded(struct hfc_multi *hc, struct hm_map *m)
{
        printk(KERN_INFO
               "HFC-multi: card manufacturer: '%s' card name: '%s' clock: %s\n",
               m->vendor_name, m->card_name, m->clock2 ? "double" : "normal");

        hc->pci_dev = NULL;
        if (m->clock2)
                test_and_set_bit(HFC_CHIP_CLOCK2, &hc->chip);

        hc->leds = m->leds;
        hc->ledstate = 0xAFFEAFFE;
        hc->opticalsupport = m->opticalsupport;

        hc->pci_iobase = 0;
        hc->pci_membase = 0;
        hc->xhfc_membase = NULL;
        hc->xhfc_memaddr = NULL;
        hc->xhfc_memdata = NULL;

        /* set memory access methods */
        if (m->io_mode) /* use mode from card config */
                hc->io_mode = m->io_mode;
        switch (hc->io_mode) {
        case HFC_IO_MODE_EMBSD:
                test_and_set_bit(HFC_CHIP_EMBSD, &hc->chip);
                hc->slots = 128; /* required */
                hc->HFC_outb = HFC_outb_embsd;
                hc->HFC_inb = HFC_inb_embsd;
                hc->HFC_inw = HFC_inw_embsd;
                hc->HFC_wait = HFC_wait_embsd;
                hc->read_fifo = read_fifo_embsd;
                hc->write_fifo = write_fifo_embsd;
                hc->xhfc_origmembase = XHFC_MEMBASE + XHFC_OFFSET * hc->id;
                hc->xhfc_membase = (u_char *)ioremap(hc->xhfc_origmembase,
                                                     XHFC_MEMSIZE);
                if (!hc->xhfc_membase) {
                        printk(KERN_WARNING
                               "HFC-multi: failed to remap xhfc address space. "
                               "(internal error)\n");
                        return -EIO;
                }
                hc->xhfc_memaddr = (u_long *)(hc->xhfc_membase + 4);
                hc->xhfc_memdata = (u_long *)(hc->xhfc_membase);
                printk(KERN_INFO
                       "HFC-multi: xhfc_membase:%#lx xhfc_origmembase:%#lx "
                       "xhfc_memaddr:%#lx xhfc_memdata:%#lx\n",
                       (u_long)hc->xhfc_membase, hc->xhfc_origmembase,
                       (u_long)hc->xhfc_memaddr, (u_long)hc->xhfc_memdata);
                break;
        default:
                printk(KERN_WARNING "HFC-multi: Invalid IO mode.\n");
                return -EIO;
        }

        /* Prepare the MPC8XX PortA 10 as output (address/data selector) */
        hc->immap = (struct immap *)(IMAP_ADDR);
        hc->immap->im_ioport.iop_papar &= ~(PA_XHFC_A0);
        hc->immap->im_ioport.iop_paodr &= ~(PA_XHFC_A0);
        hc->immap->im_ioport.iop_padir |=   PA_XHFC_A0;

        /* Prepare the MPC8xx PortB __X__ as input (ISDN__X__IRQ) */
        hc->pb_irqmsk = (PB_XHFC_IRQ1 << hc->id);
        hc->immap->im_cpm.cp_pbpar &= ~(hc->pb_irqmsk);
        hc->immap->im_cpm.cp_pbodr &= ~(hc->pb_irqmsk);
        hc->immap->im_cpm.cp_pbdir &= ~(hc->pb_irqmsk);

        /* At this point the needed config is done */
        /* fifos are still not enabled */
        return 0;
}