// SPDX-License-Identifier: GPL-2.0-only
/*
 * Sharp SL-C7xx Series PCMCIA routines
 *
 * Copyright (c) 2004-2005 Richard Purdie
 *
 * Based on Sharp's 2.4 kernel patches and pxa2xx_mainstone.c
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>

#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <asm/irq.h>
#include <asm/hardware/scoop.h>

#include "soc_common.h"

#define	NO_KEEP_VS 0x0001
#define SCOOP_DEV platform_scoop_config->devs

static void sharpsl_pcmcia_init_reset(struct soc_pcmcia_socket *skt)
{
	struct scoop_pcmcia_dev *scoopdev = &SCOOP_DEV[skt->nr];

	reset_scoop(scoopdev->dev);

	/* Shared power controls need to be handled carefully */
	if (platform_scoop_config->power_ctrl)
		platform_scoop_config->power_ctrl(scoopdev->dev, 0x0000, skt->nr);
	else
		write_scoop_reg(scoopdev->dev, SCOOP_CPR, 0x0000);

	scoopdev->keep_vs = NO_KEEP_VS;
	scoopdev->keep_rd = 0;
}

static int sharpsl_pcmcia_hw_init(struct soc_pcmcia_socket *skt)
{
	if (SCOOP_DEV[skt->nr].cd_irq >= 0) {
		skt->stat[SOC_STAT_CD].irq = SCOOP_DEV[skt->nr].cd_irq;
		skt->stat[SOC_STAT_CD].name = SCOOP_DEV[skt->nr].cd_irq_str;
	}

	skt->socket.pci_irq = SCOOP_DEV[skt->nr].irq;

	return 0;
}

static void sharpsl_pcmcia_socket_state(struct soc_pcmcia_socket *skt,
				    struct pcmcia_state *state)
{
	unsigned short cpr, csr;
	struct device *scoop = SCOOP_DEV[skt->nr].dev;

	cpr = read_scoop_reg(SCOOP_DEV[skt->nr].dev, SCOOP_CPR);

	write_scoop_reg(scoop, SCOOP_IRM, 0x00FF);
	write_scoop_reg(scoop, SCOOP_ISR, 0x0000);
	write_scoop_reg(scoop, SCOOP_IRM, 0x0000);
	csr = read_scoop_reg(scoop, SCOOP_CSR);
	if (csr & 0x0004) {
		/* card eject */
		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
		SCOOP_DEV[skt->nr].keep_vs = NO_KEEP_VS;
	}
	else if (!(SCOOP_DEV[skt->nr].keep_vs & NO_KEEP_VS)) {
		/* keep vs1,vs2 */
		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
		csr |= SCOOP_DEV[skt->nr].keep_vs;
	}
	else if (cpr & 0x0003) {
		/* power on */
		write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
		SCOOP_DEV[skt->nr].keep_vs = (csr & 0x00C0);
	}
	else {
		/* card detect */
	        if ((machine_is_spitz() || machine_is_borzoi()) && skt->nr == 1) {
	                write_scoop_reg(scoop, SCOOP_CDR, 0x0000);
	        } else {
		        write_scoop_reg(scoop, SCOOP_CDR, 0x0002);
	        }
	}

	state->detect = (csr & 0x0004) ? 0 : 1;
	state->ready  = (csr & 0x0002) ? 1 : 0;
	state->bvd1   = (csr & 0x0010) ? 1 : 0;
	state->bvd2   = (csr & 0x0020) ? 1 : 0;
	state->wrprot = (csr & 0x0008) ? 1 : 0;
	state->vs_3v  = (csr & 0x0040) ? 0 : 1;
	state->vs_Xv  = (csr & 0x0080) ? 0 : 1;

	if ((cpr & 0x0080) && ((cpr & 0x8040) != 0x8040)) {
		printk(KERN_ERR "sharpsl_pcmcia_socket_state(): CPR=%04X, Low voltage!\n", cpr);
	}
}


static int sharpsl_pcmcia_configure_socket(struct soc_pcmcia_socket *skt,
				       const socket_state_t *state)
{
	unsigned long flags;
	struct device *scoop = SCOOP_DEV[skt->nr].dev;

	unsigned short cpr, ncpr, ccr, nccr, mcr, nmcr, imr, nimr;

	switch (state->Vcc) {
	case	0:  	break;
	case 	33: 	break;
	case	50: 	break;
	default:
		 printk(KERN_ERR "sharpsl_pcmcia_configure_socket(): bad Vcc %u\n", state->Vcc);
		 return -1;
	}

	if ((state->Vpp!=state->Vcc) && (state->Vpp!=0)) {
		printk(KERN_ERR "CF slot cannot support Vpp %u\n", state->Vpp);
		return -1;
	}

	local_irq_save(flags);

	nmcr = (mcr = read_scoop_reg(scoop, SCOOP_MCR)) & ~0x0010;
	ncpr = (cpr = read_scoop_reg(scoop, SCOOP_CPR)) & ~0x0083;
	nccr = (ccr = read_scoop_reg(scoop, SCOOP_CCR)) & ~0x0080;
	nimr = (imr = read_scoop_reg(scoop, SCOOP_IMR)) & ~0x003E;

	if ((machine_is_spitz() || machine_is_borzoi() || machine_is_akita()) && skt->nr == 0) {
	        ncpr |= (state->Vcc == 33) ? 0x0002 :
		        (state->Vcc == 50
/* SCTP kernel reference Implementation
 * (C) Copyright IBM Corp. 2001, 2004
 * Copyright (c) 1999-2000 Cisco, Inc.
 * Copyright (c) 1999-2001 Motorola, Inc.
 * Copyright (c) 2001 Intel Corp.
 * Copyright (c) 2001 Nokia, Inc.
 * Copyright (c) 2001 La Monte H.P. Yarroll
 *
 * This file is part of the SCTP kernel reference Implementation
 *
 * Initialization/cleanup for SCTP protocol support.
 *
 * The SCTP reference implementation is free software;
 * you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * The SCTP reference implementation is distributed in the hope that it
 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *                 ************************
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GNU CC; see the file COPYING.  If not, write to
 * the Free Software Foundation, 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <lksctp-developers@lists.sourceforge.net>
 *
 * Or submit a bug report through the following website:
 *    http://www.sf.net/projects/lksctp
 *
 * Written or modified by:
 *    La Monte H.P. Yarroll <piggy@acm.org>
 *    Karl Knutson <karl@athena.chicago.il.us>
 *    Jon Grimm <jgrimm@us.ibm.com>
 *    Sridhar Samudrala <sri@us.ibm.com>
 *    Daisy Chang <daisyc@us.ibm.com>
 *    Ardelle Fan <ardelle.fan@intel.com>
 *
 * Any bugs reported given to us we will try to fix... any fixes shared will
 * be incorporated into the next SCTP release.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/seq_file.h>
#include <net/protocol.h>
#include <net/ip.h>
#include <net/ipv6.h>
#include <net/route.h>
#include <net/sctp/sctp.h>
#include <net/addrconf.h>
#include <net/inet_common.h>
#include <net/inet_ecn.h>

/* Global data structures. */
struct sctp_globals sctp_globals;
struct proc_dir_entry	*proc_net_sctp;
DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics) __read_mostly;

struct idr sctp_assocs_id;
DEFINE_SPINLOCK(sctp_assocs_id_lock);

/* This is the global socket data structure used for responding to
 * the Out-of-the-blue (OOTB) packets.  A control sock will be created
 * for this socket at the initialization time.
 */
static struct socket *sctp_ctl_socket;

static struct sctp_pf *sctp_pf_inet6_specific;
static struct sctp_pf *sctp_pf_inet_specific;
static struct sctp_af *sctp_af_v4_specific;
static struct sctp_af *sctp_af_v6_specific;

kmem_cache_t *sctp_chunk_cachep __read_mostly;
kmem_cache_t *sctp_bucket_cachep __read_mostly;

extern int sctp_snmp_proc_init(void);
extern int sctp_snmp_proc_exit(void);
extern int sctp_eps_proc_init(void);
extern int sctp_eps_proc_exit(void);
extern int sctp_assocs_proc_init(void);
extern int sctp_assocs_proc_exit(void);

/* Return the address of the control sock. */
struct sock *sctp_get_ctl_sock(void)
{
	return sctp_ctl_socket->sk;
}

/* Set up the proc fs entry for the SCTP protocol. */
static __init int sctp_proc_init(void)
{
	if (!proc_net_sctp) {
		struct proc_dir_entry *ent;
		ent = proc_mkdir("net/sctp", NULL);
		if (ent) {
			ent->owner = THIS_MODULE;
			proc_net_sctp = ent;
		} else
			goto out_nomem;
	}

	if (sctp_snmp_proc_init())
		goto out_nomem;	
	if (sctp_eps_proc_init())
		goto out_nomem;	
	if (sctp_assocs_proc_init())
		goto out_nomem;	

	return 0;

out_nomem:
	return -ENOMEM;
}

/* Clean up the proc fs entry for the SCTP protocol. 
 * Note: Do not make this __exit as it is used in the init error
 * path.
 */
static void sctp_proc_exit(void)
{
	sctp_snmp_proc_exit();
	sctp_eps_proc_exit();
	sctp_assocs_proc_exit();

	if (pro