* Copyright (c) 2006 Urbana-Champaign Independent Media Center.

/* $Id: rmixl_com.c,v 1.8 2018/12/11 06:34:00 thorpej Exp $ */
/*-
* Copyright (c) 2006 Urbana-Champaign Independent Media Center.
* Copyright (c) 2006 Garrett D'Amore.
* All rights reserved.
*
* Portions of this code were written by Garrett D'Amore for the
* Champaign-Urbana Community Wireless Network Project.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgements:
* This product includes software developed by the Urbana-Champaign
* Independent Media Center.
* This product includes software developed by Garrett D'Amore.
* 4. Urbana-Champaign Independent Media Center's name and Garrett
* D'Amore's name may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
* MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
* MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/

/*-
* Copyright (c) 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)com.c 7.5 (Berkeley) 5/16/91
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rmixl_com.c,v 1.8 2018/12/11 06:34:00 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/termios.h>
#include <sys/ttydefaults.h>
#include <sys/types.h>

#include <sys/bus.h>

#include <dev/cons.h>
#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>

#include <mips/cpuregs.h>

#include <mips/rmi/rmixlvar.h>
#include <mips/rmi/rmixl_intr.h>
#include <mips/rmi/rmixl_obiovar.h>
#include <mips/rmi/rmixl_comvar.h>

/* span of UART regs in bytes */
#define RMIXL_IO_DEV_UART_SIZE (COM_NPORTS * sizeof(uint32_t))

struct rmixl_com_softc {
struct com_softc sc_com;
};

static void rmixl_com_init_regs(struct com_regs *, bus_space_tag_t,
bus_space_handle_t, bus_addr_t);
static int rmixl_com_match(device_t, cfdata_t , void *);
static void rmixl_com_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(com_rmixl, sizeof(struct rmixl_com_softc),
rmixl_com_match, rmixl_com_attach, NULL, NULL);

volatile int32_t *com0addr = (int32_t *)
MIPS_PHYS_TO_KSEG1(RMIXL_IO_DEV_PBASE + RMIXL_IO_DEV_UART_1);

extern int comcnfreq;
extern int comcnspeed;

void
rmixl_putchar_init(uint64_t io_pbase)
{
int rate;
extern int comspeed(long, long, int);

com0addr = (uint32_t *)
MIPS_PHYS_TO_KSEG1(io_pbase + RMIXL_IO_DEV_UART_1);

if (comcnfreq != -1) {
rate = comspeed(comcnspeed, comcnfreq, COM_TYPE_NORMAL);
if (rate < 0)
return; /* XXX */

com0addr[com_ier] = 0;
com0addr[com_lctl] = htobe32(LCR_DLAB);
com0addr[com_dlbl] = htobe32(rate & 0xff);
com0addr[com_dlbh] = htobe32(rate >> 8);
com0addr[com_lctl] = htobe32(LCR_8BITS); /* XXX */
com0addr[com_mcr] = htobe32(MCR_DTR|MCR_RTS);
com0addr[com_fifo] = htobe32(
FIFO_ENABLE|FIFO_RCV_RST|FIFO_XMT_RST|FIFO_TRIGGER_1);
}
}

void
rmixl_putchar(char c)
{
int timo = 150000;

while ((be32toh(com0addr[com_lsr]) & LSR_TXRDY) == 0)
if (--timo == 0)
break;

com0addr[com_data] = htobe32((uint32_t)c);

while ((be32toh(com0addr[com_lsr]) & LSR_TSRE) == 0)
if (--timo == 0)
break;
}

void
rmixl_puts(const char *restrict s)
{
char c;

while ((c = *s++) != 0)
rmixl_putchar(c);
}

static char hexc[] = "0123456789abcdef";

#define RMIXL_PUTHEX \
u_int shift = sizeof(val) * 8; \
rmixl_putchar('0'); \
rmixl_putchar('x'); \
do { \
shift -= 4; \
rmixl_putchar(hexc[(val >> shift) & 0xf]); \
} while(shift != 0)

void
rmixl_puthex32(uint32_t val)
{
RMIXL_PUTHEX;
}

void
rmixl_puthex64(uint64_t val)
{
RMIXL_PUTHEX;
}

int
rmixl_com_match(device_t parent, cfdata_t cf, void *aux)
{
struct obio_attach_args *obio = aux;
bus_space_tag_t bst;
bus_space_handle_t ioh;
bus_addr_t addr;
bus_size_t size;
struct com_regs regs;
int rv;

bst = obio->obio_eb_bst;
addr = obio->obio_addr;
size = (bus_size_t)RMIXL_IO_DEV_UART_SIZE;

if (com_is_console(bst, addr, &regs.cr_ioh))
return 1;

if (bus_space_map(bst, addr, size, 0, &ioh))
return 0; /* FAIL */

rmixl_com_init_regs(&regs, bst, ioh, addr);

rv = com_probe_subr(&regs);

bus_space_unmap(bst, ioh, size);

return rv;
}

void
rmixl_com_attach(device_t parent, device_t self, void *aux)
{
struct rmixl_com_softc *rsc = device_private(self);
struct com_softc *sc = &rsc->sc_com;
struct obio_attach_args *obio = aux;
bus_space_tag_t bst;
bus_space_handle_t ioh;
bus_addr_t addr;
bus_size_t size;

sc->sc_dev = self;
sc->sc_frequency = comcnfreq;

bst = obio->obio_eb_bst;
addr = obio->obio_addr;
size = (bus_size_t)RMIXL_IO_DEV_UART_SIZE;

if (!com_is_console(bst, addr, &ioh)
&& bus_space_map(bst, addr, size, 0, &ioh) != 0) {
aprint_error(": can't map registers\n");
return;
}

rmixl_com_init_regs(&sc->sc_regs, bst, ioh, addr);

com_attach_subr(sc);

rmixl_intr_establish(obio->obio_intr, obio->obio_tmsk,
IPL_VM, RMIXL_TRIG_LEVEL, RMIXL_POLR_HIGH,
comintr, sc, true);

}

void
rmixl_com_init_regs(struct com_regs *regsp, bus_space_tag_t st,
bus_space_handle_t sh, bus_addr_t addr)
{

com_init_regs_stride(regsp, st, sh, addr, 2);
}

void
rmixl_com_cnattach(bus_addr_t addr, int speed, int freq,
int type, tcflag_t mode)
{
bus_space_tag_t bst;
struct com_regs regs;

bst = (bus_space_tag_t)&rmixl_configuration.rc_obio_eb_memt;

rmixl_com_init_regs(&regs, bst, 0, addr);

comcnattach1(&regs, speed, freq, type, mode);
}