* Copyright (c) 2006 Itronix Inc.

/* $NetBSD: dbau1550.c,v 1.13 2014/03/12 22:21:07 mrg Exp $ */

/*-
* Copyright (c) 2006 Itronix Inc.
* All rights reserved.
*
* Written by Garrett D'Amore for Itronix Inc.
*
* 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. The name of Itronix Inc. may not be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC. 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: dbau1550.c,v 1.13 2014/03/12 22:21:07 mrg Exp $");

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/time.h>

#include <mips/locore.h>

#include <mips/alchemy/include/aureg.h>
#include <mips/alchemy/dev/aupcmciavar.h>
#include <mips/alchemy/dev/aupcmciareg.h>
#include <mips/alchemy/dev/augpioreg.h>
#include <mips/alchemy/dev/auspivar.h>

#include <evbmips/alchemy/obiovar.h>
#include <evbmips/alchemy/board.h>
#include <evbmips/alchemy/dbau1550reg.h>

#include "auspi.h"

/*
* This should be converted to use bus_space routines.
*/
#define GET16(x) \
(*((volatile uint16_t *)MIPS_PHYS_TO_KSEG1(x)))
#define PUT16(x, v) \
(*((volatile uint16_t *)MIPS_PHYS_TO_KSEG1(x)) = (v))
#define GET32(x) \
(*((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(x)))
#define PUT32(x, v) \
(*((volatile uint32_t *)MIPS_PHYS_TO_KSEG1(x)) = (v))

static void dbau1550_init(void);
static int dbau1550_pci_intr_map(const struct pci_attach_args *,
pci_intr_handle_t *);
static void dbau1550_poweroff(void);
static void dbau1550_reboot(void);
static bus_addr_t dbau1550_slot_offset(int);
static int dbau1550_slot_irq(int, int);
static void dbau1550_slot_enable(int);
static void dbau1550_slot_disable(int);
static int dbau1550_slot_status(int);
static const char *dbau1550_slot_name(int);
static const struct auspi_machdep *dbau1550_spi(bus_addr_t);

static const struct obiodev dbau1550_devices[] = {
{ NULL },
};

static struct aupcmcia_machdep dbau1550_pcmcia = {
2, /* nslots */
dbau1550_slot_offset,
dbau1550_slot_irq,
dbau1550_slot_enable,
dbau1550_slot_disable,
dbau1550_slot_status,
dbau1550_slot_name,
};

static struct alchemy_board dbau1550_info = {
.ab_name = "AMD Alchemy DBAu1550",
.ab_devices = dbau1550_devices,
.ab_init = dbau1550_init,
.ab_pci_intr_map = dbau1550_pci_intr_map,
.ab_reboot = dbau1550_reboot,
.ab_poweroff = dbau1550_poweroff,
.ab_pcmcia = &dbau1550_pcmcia,
.ab_spi = dbau1550_spi,
};

const struct alchemy_board *
board_info(void)
{

return &dbau1550_info;
}

void
dbau1550_init(void)
{
uint16_t whoami;
uint32_t sysclk;
uint32_t pinfunc;

if (MIPS_PRID_COPTS(mips_options.mips_cpu_id) != MIPS_AU1550)
panic("dbau1550: CPU not Au1550");

/* check the whoami register for a match */
whoami = GET16(DBAU1550_WHOAMI);

if (DBAU1550_WHOAMI_BOARD(whoami) != DBAU1550_WHOAMI_DBAU1550_REV1)
panic("dbau1550: WHOAMI (%x) not DBAu1550!", whoami);

printf("DBAu1550 (cabernet), CPLDv%d, ",
DBAU1550_WHOAMI_CPLD(whoami));

if (DBAU1550_WHOAMI_DAUGHTER(whoami) != 0xf)
printf("daughtercard 0x%x\n",
DBAU1550_WHOAMI_DAUGHTER(whoami));
else
printf("no daughtercard\n");

/* leave console and clocks alone -- YAMON should have got it right! */

/*
* Initialize PSC clocks.
*
* PSC0 is SPI. Use 48MHz FREQ1.
* PSC1 is AC97.
* PSC2 is SMBus, and must be 48MHz. (Configured by YAMON)
* PSC3 is I2S.
*
* FREQ2 is 48MHz for USBH/USBD.
*/
sysclk = GET32(SYS_CLKSRC);
sysclk &= ~(SCS_MP0(7) | SCS_DP0 | SCS_CP0);
sysclk |= SCS_MP0(3);
PUT32(SYS_CLKSRC, sysclk);

/*
* Configure pin function for PSC devices.
*/
pinfunc = GET32(SYS_PINFUNC);
/* configure PSC0 SYNC1 */
pinfunc |= SPF_S0;
/* configure PSC2 for SMBus (YAMON default) */
pinfunc &= ~SPF_PSC2_MASK;
pinfunc |= SPF_PSC2_SMBUS;
/* configure PSC3 for I2S (YAMON default) */
pinfunc &= ~SPF_PSC3_MASK;
pinfunc |= SPF_PSC3_I2S;
PUT32(SYS_PINFUNC, pinfunc);
}

int
dbau1550_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
{
/*
* This platform has one onboard PCI IDE controller, and two
* PCI expansion slots.
*/
static const int irqmap[3/*device*/][4/*pin*/] = {
{ 5, -1, -1, -1 }, /* 11: IDE */
{ 2, 5, 6, 1 }, /* 12: PCI Slot 2 */
{ 1, 2, 5, 6 }, /* 13: PCI Slot 3 */
};
int pin, dev, irq;

/* if interrupt pin not used... */
if ((pin = pa->pa_intrpin) == 0)
return 1;

if (pin > 4) {
printf("pci: bad interrupt pin %d\n", pin);
return 1;
}

pci_decompose_tag(pa->pa_pc, pa->pa_intrtag, NULL, &dev, NULL);
if ((dev < 11) || (dev > 13)) {
printf("pci: bad device %d\n", dev);
return 1;
}

if ((irq = irqmap[dev - 11][pin - 1]) == -1) {
printf("pci: no IRQ routing for device %d pin %d\n", dev, pin);
return 1;
}

*ihp = irq;
return 0;
}

void
dbau1550_reboot(void)
{
PUT16(DBAU1550_SOFTWARE_RESET, 0);
wbflush();
delay(100000); /* 100 msec */
}

void
dbau1550_poweroff(void)
{
printf("\n- poweroff -\n");
PUT16(DBAU1550_SOFTWARE_RESET,
DBAU1550_SOFTWARE_RESET_PWROFF | DBAU1550_SOFTWARE_RESET_RESET);
wbflush();
delay(100000); /* 100 msec */
}

int
dbau1550_slot_irq(int slot, int which)
{
static const int irqmap[2/*slot*/][2/*which*/] = {
{ 35, 32 }, /* Slot 0: Bottom */
{ 37, 33 }, /* Slot 1: Top */
};

if ((slot >= 2) || (which >= 2))
return -1;

return (irqmap[slot][which]);
}

bus_addr_t
dbau1550_slot_offset(int slot)
{
switch (slot) {
case 0:
return (DBAU1550_PC0_ADDR);
case 1:
return (DBAU1550_PC1_ADDR);
}

return (bus_addr_t)-1;
}

void
dbau1550_slot_enable(int slot)
{
uint16_t status;
uint16_t vcc, vpp;
int shift;

status = GET16(DBAU1550_STATUS);
switch (slot) {
case 0:
status >>= DBAU1550_STATUS_PCMCIA0_VS_SHIFT;
shift = DBAU1550_PCMCIA_PC0_SHIFT;
break;
case 1:
status >>= DBAU1550_STATUS_PCMCIA1_VS_SHIFT;
shift = DBAU1550_PCMCIA_PC1_SHIFT;
break;
default:
return;
}

status &= DBAU1550_STATUS_PCMCIA_VS_MASK;
switch (status) {
case DBAU1550_STATUS_PCMCIA_VS_GND:
vcc = DBAU1550_PCMCIA_VCC_GND;
vpp = DBAU1550_PCMCIA_VPP_GND;
break;
case DBAU1550_STATUS_PCMCIA_VS_5V:
vcc = DBAU1550_PCMCIA_VCC_5V;
vpp = DBAU1550_PCMCIA_VPP_VCC;
break;
default: /* covers both 3.3v cases */
vcc = DBAU1550_PCMCIA_VCC_3V;
vpp = DBAU1550_PCMCIA_VPP_VCC;
break;
}

status = GET16(DBAU1550_PCMCIA);

/* this clears all bits for this slot */
status &= ~(DBAU1550_PCMCIA_MASK << shift);

status |= vcc << shift;
status |= vpp << shift;

PUT16(DBAU1550_PCMCIA, status);
wbflush();
tsleep(&status, PWAIT, "pcmcia_reset_0", mstohz(100));

status |= (DBAU1550_PCMCIA_DRV_EN << shift);
PUT16(DBAU1550_PCMCIA, status);
wbflush();
tsleep(&status, PWAIT, "pcmcia_reset_start", mstohz(300));

/* take it out of reset */
status |= (DBAU1550_PCMCIA_RST << shift);
PUT16(DBAU1550_PCMCIA, status);
wbflush();

/* spec says 20 msec, but experience shows even 200 is not enough */
tsleep(&status, PWAIT, "pcmcia_reset_finish", mstohz(1000));

/* NOTE: WE DO NOT SUPPORT DIFFERENT VCC/VPP LEVELS! */
/* This means that 12V cards are not supported! */
}

void
dbau1550_slot_disable(int slot)
{
uint16_t status;

status = GET16(DBAU1550_PCMCIA);
status &= ~(DBAU1550_PCMCIA_MASK);
PUT16(DBAU1550_PCMCIA, status);
wbflush();
}

int
dbau1550_slot_status(int slot)
{
uint16_t status, mask;
status = GET16(DBAU1550_STATUS);
switch (slot) {
case 0:
mask = DBAU1550_STATUS_PCMCIA0_INSERTED;
break;
case 1:
mask = DBAU1550_STATUS_PCMCIA1_INSERTED;
break;

default:
return 0;
}

return ((mask & status) ? 0 : 1);
}

const char *
dbau1550_slot_name(int slot)
{
switch (slot) {
case 0:
return "bottom slot";
case 1:
return "top slot";
default:
return "???";
}
}

#if NAUSPI > 0

static int
dbau1550_spi_select(void *arg, int slave)
{
uint16_t status;
if ((slave < 0) || (slave > 1))
return EINVAL;
status = GET16(DBAU1550_BOARD_SPECIFIC);

if (slave) {
status |= DBAU1550_SPI_DEV_SEL;
} else {
status &= ~DBAU1550_SPI_DEV_SEL;
}
PUT16(DBAU1550_BOARD_SPECIFIC, status);
return 0;
}

const struct auspi_machdep *
dbau1550_spi(bus_addr_t ba)
{
static const struct auspi_machdep md = {
.am_nslaves = 2,
.am_cookie = NULL,
.am_select = dbau1550_spi_select,
};

/* DBAU1550 only has SPI on PSC0 */
if (ba != PSC0_BASE)
return NULL;

return &md;
}

#endif /* NAUSPI > 0 */