1/* SPDX-License-Identifier: GPL-2.0-or-later */
  2/*
  3 * Freescale MPC85xx/MPC86xx RapidIO support
  4 *
  5 * Copyright 2009 Sysgo AG
  6 * Thomas Moll <thomas.moll@sysgo.com>
  7 * - fixed maintenance access routines, check for aligned access
  8 *
  9 * Copyright 2009 Integrated Device Technology, Inc.
 10 * Alex Bounine <alexandre.bounine@idt.com>
 11 * - Added Port-Write message handling
 12 * - Added Machine Check exception handling
 13 *
 14 * Copyright (C) 2007, 2008, 2010, 2011 Freescale Semiconductor, Inc.
 15 * Zhang Wei <wei.zhang@freescale.com>
 16 * Lian Minghuan-B31939 <Minghuan.Lian@freescale.com>
 17 * Liu Gang <Gang.Liu@freescale.com>
 18 *
 19 * Copyright 2005 MontaVista Software, Inc.
 20 * Matt Porter <mporter@kernel.crashing.org>
 21 */
 22
 23#ifndef __FSL_RIO_H
 24#define __FSL_RIO_H
 25
 26#include <linux/rio.h>
 27#include <linux/rio_drv.h>
 28#include <linux/kfifo.h>
 29
 30#define RIO_REGS_WIN(mport)	(((struct rio_priv *)(mport->priv))->regs_win)
 31
 32#define RIO_MAINT_WIN_SIZE	0x400000
 33#define RIO_LTLEDCSR		0x0608
 34
 35#define DOORBELL_ROWAR_EN	0x80000000
 36#define DOORBELL_ROWAR_TFLOWLV	0x08000000 /* highest priority level */
 37#define DOORBELL_ROWAR_PCI	0x02000000 /* PCI window */
 38#define DOORBELL_ROWAR_NREAD	0x00040000 /* NREAD */
 39#define DOORBELL_ROWAR_MAINTRD	0x00070000  /* maintenance read */
 40#define DOORBELL_ROWAR_RES	0x00002000 /* wrtpy: reserved */
 41#define DOORBELL_ROWAR_MAINTWD	0x00007000
 42#define DOORBELL_ROWAR_SIZE	0x0000000b /* window size is 4k */
 43
 44#define RIO_ATMU_REGS_PORT1_OFFSET	0x10c00
 45#define RIO_ATMU_REGS_PORT2_OFFSET	0x10e00
 46#define RIO_S_DBELL_REGS_OFFSET	0x13400
 47#define RIO_S_PW_REGS_OFFSET	0x134e0
 48#define RIO_ATMU_REGS_DBELL_OFFSET	0x10C40
 49#define RIO_INB_ATMU_REGS_PORT1_OFFSET 0x10d60
 50#define RIO_INB_ATMU_REGS_PORT2_OFFSET 0x10f60
 51
 52#define MAX_MSG_UNIT_NUM	2
 53#define MAX_PORT_NUM		4
 54#define RIO_INB_ATMU_COUNT	4
 55
 56struct rio_atmu_regs {
 57	 u32 rowtar;
 58	 u32 rowtear;
 59	 u32 rowbar;
 60	 u32 pad1;
 61	 u32 rowar;
 62	 u32 pad2[3];
 63};
 64
 65struct rio_inb_atmu_regs {
 66	u32 riwtar;
 67	u32 pad1;
 68	u32 riwbar;
 69	u32 pad2;
 70	u32 riwar;
 71	u32 pad3[3];
 72};
 73
 74struct rio_dbell_ring {
 75	void *virt;
 76	dma_addr_t phys;
 77};
 78
 79struct rio_port_write_msg {
 80	 void *virt;
 81	 dma_addr_t phys;
 82	 u32 msg_count;
 83	 u32 err_count;
 84	 u32 discard_count;
 85};
 86
 87struct fsl_rio_dbell {
 88	struct rio_mport *mport[MAX_PORT_NUM];
 89	struct device *dev;
 90	struct rio_dbell_regs __iomem *dbell_regs;
 91	struct rio_dbell_ring dbell_ring;
 92	int bellirq;
 93};
 94
 95struct fsl_rio_pw {
 96	struct rio_mport *mport[MAX_PORT_NUM];
 97	struct device *dev;
 98	struct rio_pw_regs __iomem *pw_regs;
 99	struct rio_port_write_msg port_write_msg;
100	int pwirq;
101	struct work_struct pw_work;
102	struct kfifo pw_fifo;
103	spinlock_t pw_fifo_lock;
104};
105
106struct rio_priv {
107	struct device *dev;
108	void __iomem *regs_win;
109	struct rio_atmu_regs __iomem *atmu_regs;
110	struct rio_atmu_regs __iomem *maint_atmu_regs;
111	struct rio_inb_atmu_regs __iomem *inb_atmu_regs;
112	void __iomem *maint_win;
113	void *rmm_handle; /* RapidIO message manager(unit) Handle */
114};
115
116extern void __iomem *rio_regs_win;
117extern void __iomem *rmu_regs_win;
118
119extern resource_size_t rio_law_start;
120
121extern struct fsl_rio_dbell *dbell;
122extern struct fsl_rio_pw *pw;
123
124extern int fsl_rio_setup_rmu(struct rio_mport *mport,
125	struct device_node *node);
126extern int fsl_rio_port_write_init(struct fsl_rio_pw *pw);
127extern int fsl_rio_pw_enable(struct rio_mport *mport, int enable);
128extern void fsl_rio_port_error_handler(int offset);
129extern int fsl_rio_doorbell_init(struct fsl_rio_dbell *dbell);
130
131extern int fsl_rio_doorbell_send(struct rio_mport *mport,
132				int index, u16 destid, u16 data);
133extern int fsl_add_outb_message(struct rio_mport *mport,
134	struct rio_dev *rdev,
135	int mbox, void *buffer, size_t len);
136extern int fsl_open_outb_mbox(struct rio_mport *mport,
137	void *dev_id, int mbox, int entries);
138extern void fsl_close_outb_mbox(struct rio_mport *mport, int mbox);
139extern int fsl_open_inb_mbox(struct rio_mport *mport,
140	void *dev_id, int mbox, int entries);
141extern void fsl_close_inb_mbox(struct rio_mport *mport, int mbox);
142extern int fsl_add_inb_buffer(struct rio_mport *mport, int mbox, void *buf);
143extern void *fsl_get_inb_message(struct rio_mport *mport, int mbox);
144
145#endif