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Hiroshi DOYU340a6142006-12-07 15:43:59 -08001/*
2 * OMAP mailbox driver
3 *
Hiroshi DOYUf48cca82009-03-23 18:07:24 -07004 * Copyright (C) 2006-2009 Nokia Corporation. All rights reserved.
Suman Anna4899f78a2016-04-06 12:37:37 -05005 * Copyright (C) 2013-2016 Texas Instruments Incorporated - http://www.ti.com
Hiroshi DOYU340a6142006-12-07 15:43:59 -08006 *
Hiroshi DOYUf48cca82009-03-23 18:07:24 -07007 * Contact: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
Suman Anna5040f532014-06-24 19:43:41 -05008 * Suman Anna <s-anna@ti.com>
Hiroshi DOYU340a6142006-12-07 15:43:59 -08009 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * version 2 as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
Hiroshi DOYU340a6142006-12-07 15:43:59 -080018 */
19
Hiroshi DOYU340a6142006-12-07 15:43:59 -080020#include <linux/interrupt.h>
Felipe Contrerasb3e69142010-06-11 15:51:49 +000021#include <linux/spinlock.h>
22#include <linux/mutex.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090023#include <linux/slab.h>
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +000024#include <linux/kfifo.h>
25#include <linux/err.h>
Paul Gortmaker73017a52011-07-31 16:14:14 -040026#include <linux/module.h>
Suman Anna75288cc2014-09-10 14:20:59 -050027#include <linux/of_device.h>
Suman Anna5040f532014-06-24 19:43:41 -050028#include <linux/platform_device.h>
29#include <linux/pm_runtime.h>
Suman Anna5040f532014-06-24 19:43:41 -050030#include <linux/omap-mailbox.h>
Suman Anna8841a662014-11-03 17:05:50 -060031#include <linux/mailbox_controller.h>
32#include <linux/mailbox_client.h>
Hiroshi DOYU8dff0fa2009-03-23 18:07:32 -070033
Dave Gerlach8e3c5952015-09-22 19:14:52 -050034#include "mailbox.h"
35
Suman Anna5040f532014-06-24 19:43:41 -050036#define MAILBOX_REVISION 0x000
37#define MAILBOX_MESSAGE(m) (0x040 + 4 * (m))
38#define MAILBOX_FIFOSTATUS(m) (0x080 + 4 * (m))
39#define MAILBOX_MSGSTATUS(m) (0x0c0 + 4 * (m))
Hiroshi DOYU340a6142006-12-07 15:43:59 -080040
Suman Anna5040f532014-06-24 19:43:41 -050041#define OMAP2_MAILBOX_IRQSTATUS(u) (0x100 + 8 * (u))
42#define OMAP2_MAILBOX_IRQENABLE(u) (0x104 + 8 * (u))
43
44#define OMAP4_MAILBOX_IRQSTATUS(u) (0x104 + 0x10 * (u))
45#define OMAP4_MAILBOX_IRQENABLE(u) (0x108 + 0x10 * (u))
46#define OMAP4_MAILBOX_IRQENABLE_CLR(u) (0x10c + 0x10 * (u))
47
48#define MAILBOX_IRQSTATUS(type, u) (type ? OMAP4_MAILBOX_IRQSTATUS(u) : \
49 OMAP2_MAILBOX_IRQSTATUS(u))
50#define MAILBOX_IRQENABLE(type, u) (type ? OMAP4_MAILBOX_IRQENABLE(u) : \
51 OMAP2_MAILBOX_IRQENABLE(u))
52#define MAILBOX_IRQDISABLE(type, u) (type ? OMAP4_MAILBOX_IRQENABLE_CLR(u) \
53 : OMAP2_MAILBOX_IRQENABLE(u))
54
55#define MAILBOX_IRQ_NEWMSG(m) (1 << (2 * (m)))
56#define MAILBOX_IRQ_NOTFULL(m) (1 << (2 * (m) + 1))
57
Suman Anna4899f78a2016-04-06 12:37:37 -050058/* Interrupt register configuration types */
59#define MBOX_INTR_CFG_TYPE1 0
60#define MBOX_INTR_CFG_TYPE2 1
61
Suman Anna5040f532014-06-24 19:43:41 -050062struct omap_mbox_fifo {
63 unsigned long msg;
64 unsigned long fifo_stat;
65 unsigned long msg_stat;
Suman Anna5040f532014-06-24 19:43:41 -050066 unsigned long irqenable;
67 unsigned long irqstatus;
Suman Anna5040f532014-06-24 19:43:41 -050068 unsigned long irqdisable;
Suman Annabe3322e2014-06-24 19:43:42 -050069 u32 intr_bit;
Suman Anna5040f532014-06-24 19:43:41 -050070};
71
72struct omap_mbox_queue {
73 spinlock_t lock;
74 struct kfifo fifo;
75 struct work_struct work;
Suman Anna5040f532014-06-24 19:43:41 -050076 struct omap_mbox *mbox;
77 bool full;
78};
79
Suman Anna72c1c812014-06-24 19:43:43 -050080struct omap_mbox_device {
81 struct device *dev;
82 struct mutex cfg_lock;
83 void __iomem *mbox_base;
Suman Annaaf1d2f52016-04-06 18:37:18 -050084 u32 *irq_ctx;
Suman Anna72c1c812014-06-24 19:43:43 -050085 u32 num_users;
86 u32 num_fifos;
Suman Anna2240f8a2016-04-06 18:37:17 -050087 u32 intr_type;
Suman Anna72c1c812014-06-24 19:43:43 -050088 struct omap_mbox **mboxes;
Suman Anna8841a662014-11-03 17:05:50 -060089 struct mbox_controller controller;
Suman Anna72c1c812014-06-24 19:43:43 -050090 struct list_head elem;
91};
92
Suman Anna75288cc2014-09-10 14:20:59 -050093struct omap_mbox_fifo_info {
94 int tx_id;
95 int tx_usr;
96 int tx_irq;
97
98 int rx_id;
99 int rx_usr;
100 int rx_irq;
101
102 const char *name;
Dave Gerlach8e3c5952015-09-22 19:14:52 -0500103 bool send_no_irq;
Suman Anna75288cc2014-09-10 14:20:59 -0500104};
105
Suman Anna5040f532014-06-24 19:43:41 -0500106struct omap_mbox {
107 const char *name;
108 int irq;
Suman Anna8841a662014-11-03 17:05:50 -0600109 struct omap_mbox_queue *rxq;
Suman Anna5040f532014-06-24 19:43:41 -0500110 struct device *dev;
Suman Anna72c1c812014-06-24 19:43:43 -0500111 struct omap_mbox_device *parent;
Suman Annabe3322e2014-06-24 19:43:42 -0500112 struct omap_mbox_fifo tx_fifo;
113 struct omap_mbox_fifo rx_fifo;
Suman Annabe3322e2014-06-24 19:43:42 -0500114 u32 intr_type;
Suman Anna8841a662014-11-03 17:05:50 -0600115 struct mbox_chan *chan;
Dave Gerlach8e3c5952015-09-22 19:14:52 -0500116 bool send_no_irq;
Suman Anna5040f532014-06-24 19:43:41 -0500117};
118
Suman Anna72c1c812014-06-24 19:43:43 -0500119/* global variables for the mailbox devices */
120static DEFINE_MUTEX(omap_mbox_devices_lock);
121static LIST_HEAD(omap_mbox_devices);
C A Subramaniam5f00ec62009-11-22 10:11:22 -0800122
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000123static unsigned int mbox_kfifo_size = CONFIG_OMAP_MBOX_KFIFO_SIZE;
124module_param(mbox_kfifo_size, uint, S_IRUGO);
125MODULE_PARM_DESC(mbox_kfifo_size, "Size of omap's mailbox kfifo (bytes)");
126
Suman Anna8841a662014-11-03 17:05:50 -0600127static struct omap_mbox *mbox_chan_to_omap_mbox(struct mbox_chan *chan)
128{
129 if (!chan || !chan->con_priv)
130 return NULL;
131
132 return (struct omap_mbox *)chan->con_priv;
133}
134
Suman Anna72c1c812014-06-24 19:43:43 -0500135static inline
136unsigned int mbox_read_reg(struct omap_mbox_device *mdev, size_t ofs)
Suman Anna5040f532014-06-24 19:43:41 -0500137{
Suman Anna72c1c812014-06-24 19:43:43 -0500138 return __raw_readl(mdev->mbox_base + ofs);
Suman Anna5040f532014-06-24 19:43:41 -0500139}
140
Suman Anna72c1c812014-06-24 19:43:43 -0500141static inline
142void mbox_write_reg(struct omap_mbox_device *mdev, u32 val, size_t ofs)
Suman Anna5040f532014-06-24 19:43:41 -0500143{
Suman Anna72c1c812014-06-24 19:43:43 -0500144 __raw_writel(val, mdev->mbox_base + ofs);
Suman Anna5040f532014-06-24 19:43:41 -0500145}
146
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700147/* Mailbox FIFO handle functions */
Suman Anna5040f532014-06-24 19:43:41 -0500148static mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox)
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700149{
Suman Annabe3322e2014-06-24 19:43:42 -0500150 struct omap_mbox_fifo *fifo = &mbox->rx_fifo;
Suman Anna2665a4c2016-04-06 12:37:40 -0500151
152 return (mbox_msg_t)mbox_read_reg(mbox->parent, fifo->msg);
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700153}
Suman Anna5040f532014-06-24 19:43:41 -0500154
155static void mbox_fifo_write(struct omap_mbox *mbox, mbox_msg_t msg)
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700156{
Suman Annabe3322e2014-06-24 19:43:42 -0500157 struct omap_mbox_fifo *fifo = &mbox->tx_fifo;
Suman Anna2665a4c2016-04-06 12:37:40 -0500158
Suman Anna72c1c812014-06-24 19:43:43 -0500159 mbox_write_reg(mbox->parent, msg, fifo->msg);
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700160}
Suman Anna5040f532014-06-24 19:43:41 -0500161
162static int mbox_fifo_empty(struct omap_mbox *mbox)
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700163{
Suman Annabe3322e2014-06-24 19:43:42 -0500164 struct omap_mbox_fifo *fifo = &mbox->rx_fifo;
Suman Anna2665a4c2016-04-06 12:37:40 -0500165
Suman Anna72c1c812014-06-24 19:43:43 -0500166 return (mbox_read_reg(mbox->parent, fifo->msg_stat) == 0);
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700167}
Suman Anna5040f532014-06-24 19:43:41 -0500168
169static int mbox_fifo_full(struct omap_mbox *mbox)
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700170{
Suman Annabe3322e2014-06-24 19:43:42 -0500171 struct omap_mbox_fifo *fifo = &mbox->tx_fifo;
Suman Anna2665a4c2016-04-06 12:37:40 -0500172
Suman Anna72c1c812014-06-24 19:43:43 -0500173 return mbox_read_reg(mbox->parent, fifo->fifo_stat);
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700174}
175
176/* Mailbox IRQ handle functions */
Suman Anna5040f532014-06-24 19:43:41 -0500177static void ack_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700178{
Suman Annabe3322e2014-06-24 19:43:42 -0500179 struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ?
180 &mbox->tx_fifo : &mbox->rx_fifo;
181 u32 bit = fifo->intr_bit;
182 u32 irqstatus = fifo->irqstatus;
Suman Anna5040f532014-06-24 19:43:41 -0500183
Suman Anna72c1c812014-06-24 19:43:43 -0500184 mbox_write_reg(mbox->parent, bit, irqstatus);
Suman Anna5040f532014-06-24 19:43:41 -0500185
186 /* Flush posted write for irq status to avoid spurious interrupts */
Suman Anna72c1c812014-06-24 19:43:43 -0500187 mbox_read_reg(mbox->parent, irqstatus);
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700188}
Suman Anna5040f532014-06-24 19:43:41 -0500189
190static int is_mbox_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700191{
Suman Annabe3322e2014-06-24 19:43:42 -0500192 struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ?
193 &mbox->tx_fifo : &mbox->rx_fifo;
194 u32 bit = fifo->intr_bit;
195 u32 irqenable = fifo->irqenable;
196 u32 irqstatus = fifo->irqstatus;
197
Suman Anna72c1c812014-06-24 19:43:43 -0500198 u32 enable = mbox_read_reg(mbox->parent, irqenable);
199 u32 status = mbox_read_reg(mbox->parent, irqstatus);
Suman Anna5040f532014-06-24 19:43:41 -0500200
201 return (int)(enable & status & bit);
Hiroshi DOYU9ae0ee02009-03-23 18:07:26 -0700202}
203
Suman Anna8841a662014-11-03 17:05:50 -0600204static void _omap_mbox_enable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
Suman Annac869c752013-03-12 17:55:29 -0500205{
Suman Annabe3322e2014-06-24 19:43:42 -0500206 u32 l;
207 struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ?
208 &mbox->tx_fifo : &mbox->rx_fifo;
209 u32 bit = fifo->intr_bit;
210 u32 irqenable = fifo->irqenable;
Suman Anna5040f532014-06-24 19:43:41 -0500211
Suman Anna72c1c812014-06-24 19:43:43 -0500212 l = mbox_read_reg(mbox->parent, irqenable);
Suman Anna5040f532014-06-24 19:43:41 -0500213 l |= bit;
Suman Anna72c1c812014-06-24 19:43:43 -0500214 mbox_write_reg(mbox->parent, l, irqenable);
Suman Annac869c752013-03-12 17:55:29 -0500215}
Suman Annac869c752013-03-12 17:55:29 -0500216
Suman Anna8841a662014-11-03 17:05:50 -0600217static void _omap_mbox_disable_irq(struct omap_mbox *mbox, omap_mbox_irq_t irq)
Suman Annac869c752013-03-12 17:55:29 -0500218{
Suman Annabe3322e2014-06-24 19:43:42 -0500219 struct omap_mbox_fifo *fifo = (irq == IRQ_TX) ?
220 &mbox->tx_fifo : &mbox->rx_fifo;
221 u32 bit = fifo->intr_bit;
222 u32 irqdisable = fifo->irqdisable;
Suman Anna5040f532014-06-24 19:43:41 -0500223
224 /*
225 * Read and update the interrupt configuration register for pre-OMAP4.
226 * OMAP4 and later SoCs have a dedicated interrupt disabling register.
227 */
Suman Annabe3322e2014-06-24 19:43:42 -0500228 if (!mbox->intr_type)
Suman Anna72c1c812014-06-24 19:43:43 -0500229 bit = mbox_read_reg(mbox->parent, irqdisable) & ~bit;
Suman Anna5040f532014-06-24 19:43:41 -0500230
Suman Anna72c1c812014-06-24 19:43:43 -0500231 mbox_write_reg(mbox->parent, bit, irqdisable);
Suman Annac869c752013-03-12 17:55:29 -0500232}
Suman Annac869c752013-03-12 17:55:29 -0500233
Suman Anna8841a662014-11-03 17:05:50 -0600234void omap_mbox_enable_irq(struct mbox_chan *chan, omap_mbox_irq_t irq)
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800235{
Suman Anna8841a662014-11-03 17:05:50 -0600236 struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800237
Suman Anna8841a662014-11-03 17:05:50 -0600238 if (WARN_ON(!mbox))
239 return;
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000240
Suman Anna8841a662014-11-03 17:05:50 -0600241 _omap_mbox_enable_irq(mbox, irq);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800242}
Suman Anna8841a662014-11-03 17:05:50 -0600243EXPORT_SYMBOL(omap_mbox_enable_irq);
244
245void omap_mbox_disable_irq(struct mbox_chan *chan, omap_mbox_irq_t irq)
246{
247 struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
248
249 if (WARN_ON(!mbox))
250 return;
251
252 _omap_mbox_disable_irq(mbox, irq);
253}
254EXPORT_SYMBOL(omap_mbox_disable_irq);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800255
256/*
257 * Message receiver(workqueue)
258 */
259static void mbox_rx_work(struct work_struct *work)
260{
261 struct omap_mbox_queue *mq =
262 container_of(work, struct omap_mbox_queue, work);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800263 mbox_msg_t msg;
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000264 int len;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800265
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000266 while (kfifo_len(&mq->fifo) >= sizeof(msg)) {
267 len = kfifo_out(&mq->fifo, (unsigned char *)&msg, sizeof(msg));
268 WARN_ON(len != sizeof(msg));
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800269
Suman Anna8841a662014-11-03 17:05:50 -0600270 mbox_chan_received_data(mq->mbox->chan, (void *)msg);
Fernando Guzman Lugod2295042010-11-29 20:24:11 +0000271 spin_lock_irq(&mq->lock);
272 if (mq->full) {
273 mq->full = false;
Suman Anna8841a662014-11-03 17:05:50 -0600274 _omap_mbox_enable_irq(mq->mbox, IRQ_RX);
Fernando Guzman Lugod2295042010-11-29 20:24:11 +0000275 }
276 spin_unlock_irq(&mq->lock);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800277 }
278}
279
280/*
281 * Mailbox interrupt handler
282 */
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800283static void __mbox_tx_interrupt(struct omap_mbox *mbox)
284{
Suman Anna8841a662014-11-03 17:05:50 -0600285 _omap_mbox_disable_irq(mbox, IRQ_TX);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800286 ack_mbox_irq(mbox, IRQ_TX);
Suman Anna8841a662014-11-03 17:05:50 -0600287 mbox_chan_txdone(mbox->chan, 0);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800288}
289
290static void __mbox_rx_interrupt(struct omap_mbox *mbox)
291{
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000292 struct omap_mbox_queue *mq = mbox->rxq;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800293 mbox_msg_t msg;
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000294 int len;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800295
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800296 while (!mbox_fifo_empty(mbox)) {
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000297 if (unlikely(kfifo_avail(&mq->fifo) < sizeof(msg))) {
Suman Anna8841a662014-11-03 17:05:50 -0600298 _omap_mbox_disable_irq(mbox, IRQ_RX);
Fernando Guzman Lugod2295042010-11-29 20:24:11 +0000299 mq->full = true;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800300 goto nomem;
Fernando Guzman Lugo1ea5d6d2010-02-08 13:35:40 -0600301 }
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800302
303 msg = mbox_fifo_read(mbox);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800304
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000305 len = kfifo_in(&mq->fifo, (unsigned char *)&msg, sizeof(msg));
306 WARN_ON(len != sizeof(msg));
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800307 }
308
309 /* no more messages in the fifo. clear IRQ source. */
310 ack_mbox_irq(mbox, IRQ_RX);
Hiroshi DOYUf48cca82009-03-23 18:07:24 -0700311nomem:
Tejun Heoc4873002011-01-26 12:12:50 +0100312 schedule_work(&mbox->rxq->work);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800313}
314
315static irqreturn_t mbox_interrupt(int irq, void *p)
316{
Jeff Garzik2a7057e2007-10-26 05:40:22 -0400317 struct omap_mbox *mbox = p;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800318
319 if (is_mbox_irq(mbox, IRQ_TX))
320 __mbox_tx_interrupt(mbox);
321
322 if (is_mbox_irq(mbox, IRQ_RX))
323 __mbox_rx_interrupt(mbox);
324
325 return IRQ_HANDLED;
326}
327
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800328static struct omap_mbox_queue *mbox_queue_alloc(struct omap_mbox *mbox,
Suman Anna8841a662014-11-03 17:05:50 -0600329 void (*work)(struct work_struct *))
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800330{
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800331 struct omap_mbox_queue *mq;
332
Suman Anna8841a662014-11-03 17:05:50 -0600333 if (!work)
334 return NULL;
335
Suman Anna86f6f5e2016-04-06 12:37:38 -0500336 mq = kzalloc(sizeof(*mq), GFP_KERNEL);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800337 if (!mq)
338 return NULL;
339
340 spin_lock_init(&mq->lock);
341
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000342 if (kfifo_alloc(&mq->fifo, mbox_kfifo_size, GFP_KERNEL))
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800343 goto error;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800344
Suman Anna8841a662014-11-03 17:05:50 -0600345 INIT_WORK(&mq->work, work);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800346 return mq;
Suman Anna8841a662014-11-03 17:05:50 -0600347
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800348error:
349 kfree(mq);
350 return NULL;
351}
352
353static void mbox_queue_free(struct omap_mbox_queue *q)
354{
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000355 kfifo_free(&q->fifo);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800356 kfree(q);
357}
358
Hiroshi DOYUc7c158e2009-11-22 10:11:19 -0800359static int omap_mbox_startup(struct omap_mbox *mbox)
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800360{
C A Subramaniam5f00ec62009-11-22 10:11:22 -0800361 int ret = 0;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800362 struct omap_mbox_queue *mq;
363
Suman Anna8841a662014-11-03 17:05:50 -0600364 mq = mbox_queue_alloc(mbox, mbox_rx_work);
365 if (!mq)
366 return -ENOMEM;
367 mbox->rxq = mq;
368 mq->mbox = mbox;
C A Subramaniam5f00ec62009-11-22 10:11:22 -0800369
Suman Anna8841a662014-11-03 17:05:50 -0600370 ret = request_irq(mbox->irq, mbox_interrupt, IRQF_SHARED,
371 mbox->name, mbox);
372 if (unlikely(ret)) {
373 pr_err("failed to register mailbox interrupt:%d\n", ret);
374 goto fail_request_irq;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800375 }
Suman Anna8841a662014-11-03 17:05:50 -0600376
Dave Gerlach8e3c5952015-09-22 19:14:52 -0500377 if (mbox->send_no_irq)
378 mbox->chan->txdone_method = TXDONE_BY_ACK;
379
Suman Anna8841a662014-11-03 17:05:50 -0600380 _omap_mbox_enable_irq(mbox, IRQ_RX);
381
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800382 return 0;
383
Suman Annaecf305c2013-02-01 20:37:06 -0600384fail_request_irq:
385 mbox_queue_free(mbox->rxq);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800386 return ret;
387}
388
389static void omap_mbox_fini(struct omap_mbox *mbox)
390{
Suman Anna8841a662014-11-03 17:05:50 -0600391 _omap_mbox_disable_irq(mbox, IRQ_RX);
392 free_irq(mbox->irq, mbox);
393 flush_work(&mbox->rxq->work);
394 mbox_queue_free(mbox->rxq);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800395}
396
Suman Anna72c1c812014-06-24 19:43:43 -0500397static struct omap_mbox *omap_mbox_device_find(struct omap_mbox_device *mdev,
398 const char *mbox_name)
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800399{
Kevin Hilmanc0377322011-02-11 19:56:43 +0000400 struct omap_mbox *_mbox, *mbox = NULL;
Suman Anna72c1c812014-06-24 19:43:43 -0500401 struct omap_mbox **mboxes = mdev->mboxes;
402 int i;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800403
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000404 if (!mboxes)
Suman Anna72c1c812014-06-24 19:43:43 -0500405 return NULL;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800406
Kevin Hilmanc0377322011-02-11 19:56:43 +0000407 for (i = 0; (_mbox = mboxes[i]); i++) {
Suman Anna72c1c812014-06-24 19:43:43 -0500408 if (!strcmp(_mbox->name, mbox_name)) {
Kevin Hilmanc0377322011-02-11 19:56:43 +0000409 mbox = _mbox;
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000410 break;
Kevin Hilmanc0377322011-02-11 19:56:43 +0000411 }
412 }
Suman Anna72c1c812014-06-24 19:43:43 -0500413 return mbox;
414}
415
Suman Anna8841a662014-11-03 17:05:50 -0600416struct mbox_chan *omap_mbox_request_channel(struct mbox_client *cl,
417 const char *chan_name)
Suman Anna72c1c812014-06-24 19:43:43 -0500418{
Suman Anna8841a662014-11-03 17:05:50 -0600419 struct device *dev = cl->dev;
Suman Anna72c1c812014-06-24 19:43:43 -0500420 struct omap_mbox *mbox = NULL;
421 struct omap_mbox_device *mdev;
Suman Anna8841a662014-11-03 17:05:50 -0600422 struct mbox_chan *chan;
423 unsigned long flags;
Suman Anna72c1c812014-06-24 19:43:43 -0500424 int ret;
425
Suman Anna8841a662014-11-03 17:05:50 -0600426 if (!dev)
427 return ERR_PTR(-ENODEV);
428
429 if (dev->of_node) {
430 pr_err("%s: please use mbox_request_channel(), this API is supported only for OMAP non-DT usage\n",
431 __func__);
432 return ERR_PTR(-ENODEV);
433 }
434
Suman Anna72c1c812014-06-24 19:43:43 -0500435 mutex_lock(&omap_mbox_devices_lock);
436 list_for_each_entry(mdev, &omap_mbox_devices, elem) {
Suman Anna8841a662014-11-03 17:05:50 -0600437 mbox = omap_mbox_device_find(mdev, chan_name);
Suman Anna72c1c812014-06-24 19:43:43 -0500438 if (mbox)
439 break;
440 }
441 mutex_unlock(&omap_mbox_devices_lock);
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000442
Suman Anna8841a662014-11-03 17:05:50 -0600443 if (!mbox || !mbox->chan)
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000444 return ERR_PTR(-ENOENT);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800445
Suman Anna8841a662014-11-03 17:05:50 -0600446 chan = mbox->chan;
447 spin_lock_irqsave(&chan->lock, flags);
448 chan->msg_free = 0;
449 chan->msg_count = 0;
450 chan->active_req = NULL;
451 chan->cl = cl;
452 init_completion(&chan->tx_complete);
453 spin_unlock_irqrestore(&chan->lock, flags);
Kanigeri, Hari58256302010-11-29 20:24:14 +0000454
Suman Anna8841a662014-11-03 17:05:50 -0600455 ret = chan->mbox->ops->startup(chan);
Juan Gutierrez1d8a0e92012-05-13 15:33:04 +0300456 if (ret) {
Suman Anna8841a662014-11-03 17:05:50 -0600457 pr_err("Unable to startup the chan (%d)\n", ret);
458 mbox_free_channel(chan);
459 chan = ERR_PTR(ret);
Juan Gutierrez1d8a0e92012-05-13 15:33:04 +0300460 }
461
Suman Anna8841a662014-11-03 17:05:50 -0600462 return chan;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800463}
Suman Anna8841a662014-11-03 17:05:50 -0600464EXPORT_SYMBOL(omap_mbox_request_channel);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800465
Hiroshi DOYU6b233982010-05-18 16:15:32 +0300466static struct class omap_mbox_class = { .name = "mbox", };
467
Suman Anna72c1c812014-06-24 19:43:43 -0500468static int omap_mbox_register(struct omap_mbox_device *mdev)
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800469{
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000470 int ret;
471 int i;
Suman Anna72c1c812014-06-24 19:43:43 -0500472 struct omap_mbox **mboxes;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800473
Suman Anna72c1c812014-06-24 19:43:43 -0500474 if (!mdev || !mdev->mboxes)
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800475 return -EINVAL;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800476
Suman Anna72c1c812014-06-24 19:43:43 -0500477 mboxes = mdev->mboxes;
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000478 for (i = 0; mboxes[i]; i++) {
479 struct omap_mbox *mbox = mboxes[i];
Suman Anna2665a4c2016-04-06 12:37:40 -0500480
Suman Anna8841a662014-11-03 17:05:50 -0600481 mbox->dev = device_create(&omap_mbox_class, mdev->dev,
482 0, mbox, "%s", mbox->name);
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000483 if (IS_ERR(mbox->dev)) {
484 ret = PTR_ERR(mbox->dev);
485 goto err_out;
486 }
Hiroshi DOYUf48cca82009-03-23 18:07:24 -0700487 }
Suman Anna72c1c812014-06-24 19:43:43 -0500488
489 mutex_lock(&omap_mbox_devices_lock);
490 list_add(&mdev->elem, &omap_mbox_devices);
491 mutex_unlock(&omap_mbox_devices_lock);
492
Suman Anna8841a662014-11-03 17:05:50 -0600493 ret = mbox_controller_register(&mdev->controller);
Hiroshi DOYUf48cca82009-03-23 18:07:24 -0700494
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000495err_out:
Suman Anna8841a662014-11-03 17:05:50 -0600496 if (ret) {
497 while (i--)
498 device_unregister(mboxes[i]->dev);
499 }
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800500 return ret;
501}
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800502
Suman Anna72c1c812014-06-24 19:43:43 -0500503static int omap_mbox_unregister(struct omap_mbox_device *mdev)
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800504{
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000505 int i;
Suman Anna72c1c812014-06-24 19:43:43 -0500506 struct omap_mbox **mboxes;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800507
Suman Anna72c1c812014-06-24 19:43:43 -0500508 if (!mdev || !mdev->mboxes)
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000509 return -EINVAL;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800510
Suman Anna72c1c812014-06-24 19:43:43 -0500511 mutex_lock(&omap_mbox_devices_lock);
512 list_del(&mdev->elem);
513 mutex_unlock(&omap_mbox_devices_lock);
514
Suman Anna8841a662014-11-03 17:05:50 -0600515 mbox_controller_unregister(&mdev->controller);
516
Suman Anna72c1c812014-06-24 19:43:43 -0500517 mboxes = mdev->mboxes;
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000518 for (i = 0; mboxes[i]; i++)
519 device_unregister(mboxes[i]->dev);
Felipe Contreras9c80c8c2010-06-11 15:51:46 +0000520 return 0;
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800521}
Suman Anna5040f532014-06-24 19:43:41 -0500522
Suman Anna8841a662014-11-03 17:05:50 -0600523static int omap_mbox_chan_startup(struct mbox_chan *chan)
524{
525 struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
526 struct omap_mbox_device *mdev = mbox->parent;
527 int ret = 0;
528
529 mutex_lock(&mdev->cfg_lock);
530 pm_runtime_get_sync(mdev->dev);
531 ret = omap_mbox_startup(mbox);
532 if (ret)
533 pm_runtime_put_sync(mdev->dev);
534 mutex_unlock(&mdev->cfg_lock);
535 return ret;
536}
537
538static void omap_mbox_chan_shutdown(struct mbox_chan *chan)
539{
540 struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
541 struct omap_mbox_device *mdev = mbox->parent;
542
543 mutex_lock(&mdev->cfg_lock);
544 omap_mbox_fini(mbox);
545 pm_runtime_put_sync(mdev->dev);
546 mutex_unlock(&mdev->cfg_lock);
547}
548
Dave Gerlach8e3c5952015-09-22 19:14:52 -0500549static int omap_mbox_chan_send_noirq(struct omap_mbox *mbox, void *data)
Suman Anna8841a662014-11-03 17:05:50 -0600550{
Suman Anna8841a662014-11-03 17:05:50 -0600551 int ret = -EBUSY;
552
Dave Gerlach8e3c5952015-09-22 19:14:52 -0500553 if (!mbox_fifo_full(mbox)) {
554 _omap_mbox_enable_irq(mbox, IRQ_RX);
555 mbox_fifo_write(mbox, (mbox_msg_t)data);
556 ret = 0;
557 _omap_mbox_disable_irq(mbox, IRQ_RX);
558
559 /* we must read and ack the interrupt directly from here */
560 mbox_fifo_read(mbox);
561 ack_mbox_irq(mbox, IRQ_RX);
562 }
563
564 return ret;
565}
566
567static int omap_mbox_chan_send(struct omap_mbox *mbox, void *data)
568{
569 int ret = -EBUSY;
Suman Anna8841a662014-11-03 17:05:50 -0600570
571 if (!mbox_fifo_full(mbox)) {
572 mbox_fifo_write(mbox, (mbox_msg_t)data);
573 ret = 0;
574 }
575
576 /* always enable the interrupt */
577 _omap_mbox_enable_irq(mbox, IRQ_TX);
578 return ret;
579}
580
Dave Gerlach8e3c5952015-09-22 19:14:52 -0500581static int omap_mbox_chan_send_data(struct mbox_chan *chan, void *data)
582{
583 struct omap_mbox *mbox = mbox_chan_to_omap_mbox(chan);
584 int ret;
585
586 if (!mbox)
587 return -EINVAL;
588
589 if (mbox->send_no_irq)
590 ret = omap_mbox_chan_send_noirq(mbox, data);
591 else
592 ret = omap_mbox_chan_send(mbox, data);
593
594 return ret;
595}
596
Andrew Bresticker05ae7972015-05-04 10:36:35 -0700597static const struct mbox_chan_ops omap_mbox_chan_ops = {
Suman Anna8841a662014-11-03 17:05:50 -0600598 .startup = omap_mbox_chan_startup,
599 .send_data = omap_mbox_chan_send_data,
600 .shutdown = omap_mbox_chan_shutdown,
601};
602
Suman Annaaf1d2f52016-04-06 18:37:18 -0500603#ifdef CONFIG_PM_SLEEP
604static int omap_mbox_suspend(struct device *dev)
605{
606 struct omap_mbox_device *mdev = dev_get_drvdata(dev);
Suman Anna9f0cee92016-04-06 18:37:19 -0500607 u32 usr, fifo, reg;
Suman Annaaf1d2f52016-04-06 18:37:18 -0500608
609 if (pm_runtime_status_suspended(dev))
610 return 0;
611
Suman Anna9f0cee92016-04-06 18:37:19 -0500612 for (fifo = 0; fifo < mdev->num_fifos; fifo++) {
613 if (mbox_read_reg(mdev, MAILBOX_MSGSTATUS(fifo))) {
614 dev_err(mdev->dev, "fifo %d has unexpected unread messages\n",
615 fifo);
616 return -EBUSY;
617 }
618 }
619
Suman Annaaf1d2f52016-04-06 18:37:18 -0500620 for (usr = 0; usr < mdev->num_users; usr++) {
621 reg = MAILBOX_IRQENABLE(mdev->intr_type, usr);
622 mdev->irq_ctx[usr] = mbox_read_reg(mdev, reg);
623 }
624
625 return 0;
626}
627
628static int omap_mbox_resume(struct device *dev)
629{
630 struct omap_mbox_device *mdev = dev_get_drvdata(dev);
631 u32 usr, reg;
632
633 if (pm_runtime_status_suspended(dev))
634 return 0;
635
636 for (usr = 0; usr < mdev->num_users; usr++) {
637 reg = MAILBOX_IRQENABLE(mdev->intr_type, usr);
638 mbox_write_reg(mdev, mdev->irq_ctx[usr], reg);
639 }
640
641 return 0;
642}
643#endif
644
645static const struct dev_pm_ops omap_mbox_pm_ops = {
646 SET_SYSTEM_SLEEP_PM_OPS(omap_mbox_suspend, omap_mbox_resume)
647};
648
Suman Anna75288cc2014-09-10 14:20:59 -0500649static const struct of_device_id omap_mailbox_of_match[] = {
650 {
651 .compatible = "ti,omap2-mailbox",
652 .data = (void *)MBOX_INTR_CFG_TYPE1,
653 },
654 {
655 .compatible = "ti,omap3-mailbox",
656 .data = (void *)MBOX_INTR_CFG_TYPE1,
657 },
658 {
659 .compatible = "ti,omap4-mailbox",
660 .data = (void *)MBOX_INTR_CFG_TYPE2,
661 },
662 {
663 /* end */
664 },
665};
666MODULE_DEVICE_TABLE(of, omap_mailbox_of_match);
667
Suman Anna8841a662014-11-03 17:05:50 -0600668static struct mbox_chan *omap_mbox_of_xlate(struct mbox_controller *controller,
669 const struct of_phandle_args *sp)
670{
671 phandle phandle = sp->args[0];
672 struct device_node *node;
673 struct omap_mbox_device *mdev;
674 struct omap_mbox *mbox;
675
676 mdev = container_of(controller, struct omap_mbox_device, controller);
677 if (WARN_ON(!mdev))
Benson Leung2d805fc2015-05-04 10:36:36 -0700678 return ERR_PTR(-EINVAL);
Suman Anna8841a662014-11-03 17:05:50 -0600679
680 node = of_find_node_by_phandle(phandle);
681 if (!node) {
682 pr_err("%s: could not find node phandle 0x%x\n",
683 __func__, phandle);
Benson Leung2d805fc2015-05-04 10:36:36 -0700684 return ERR_PTR(-ENODEV);
Suman Anna8841a662014-11-03 17:05:50 -0600685 }
686
687 mbox = omap_mbox_device_find(mdev, node->name);
688 of_node_put(node);
Benson Leung2d805fc2015-05-04 10:36:36 -0700689 return mbox ? mbox->chan : ERR_PTR(-ENOENT);
Suman Anna8841a662014-11-03 17:05:50 -0600690}
691
Suman Anna5040f532014-06-24 19:43:41 -0500692static int omap_mbox_probe(struct platform_device *pdev)
693{
694 struct resource *mem;
695 int ret;
Suman Anna8841a662014-11-03 17:05:50 -0600696 struct mbox_chan *chnls;
Suman Anna5040f532014-06-24 19:43:41 -0500697 struct omap_mbox **list, *mbox, *mboxblk;
Suman Anna75288cc2014-09-10 14:20:59 -0500698 struct omap_mbox_fifo_info *finfo, *finfoblk;
Suman Anna72c1c812014-06-24 19:43:43 -0500699 struct omap_mbox_device *mdev;
Suman Annabe3322e2014-06-24 19:43:42 -0500700 struct omap_mbox_fifo *fifo;
Suman Anna75288cc2014-09-10 14:20:59 -0500701 struct device_node *node = pdev->dev.of_node;
702 struct device_node *child;
703 const struct of_device_id *match;
704 u32 intr_type, info_count;
705 u32 num_users, num_fifos;
706 u32 tmp[3];
Suman Anna5040f532014-06-24 19:43:41 -0500707 u32 l;
708 int i;
709
Suman Anna4899f78a2016-04-06 12:37:37 -0500710 if (!node) {
711 pr_err("%s: only DT-based devices are supported\n", __func__);
Suman Anna5040f532014-06-24 19:43:41 -0500712 return -ENODEV;
713 }
714
Suman Anna4899f78a2016-04-06 12:37:37 -0500715 match = of_match_device(omap_mailbox_of_match, &pdev->dev);
716 if (!match)
717 return -ENODEV;
718 intr_type = (u32)match->data;
Suman Anna75288cc2014-09-10 14:20:59 -0500719
Suman Anna4899f78a2016-04-06 12:37:37 -0500720 if (of_property_read_u32(node, "ti,mbox-num-users", &num_users))
721 return -ENODEV;
Suman Anna75288cc2014-09-10 14:20:59 -0500722
Suman Anna4899f78a2016-04-06 12:37:37 -0500723 if (of_property_read_u32(node, "ti,mbox-num-fifos", &num_fifos))
724 return -ENODEV;
Suman Anna75288cc2014-09-10 14:20:59 -0500725
Suman Anna4899f78a2016-04-06 12:37:37 -0500726 info_count = of_get_available_child_count(node);
727 if (!info_count) {
728 dev_err(&pdev->dev, "no available mbox devices found\n");
729 return -ENODEV;
Suman Anna75288cc2014-09-10 14:20:59 -0500730 }
731
732 finfoblk = devm_kzalloc(&pdev->dev, info_count * sizeof(*finfoblk),
733 GFP_KERNEL);
734 if (!finfoblk)
735 return -ENOMEM;
736
737 finfo = finfoblk;
738 child = NULL;
739 for (i = 0; i < info_count; i++, finfo++) {
Suman Anna4899f78a2016-04-06 12:37:37 -0500740 child = of_get_next_available_child(node, child);
741 ret = of_property_read_u32_array(child, "ti,mbox-tx", tmp,
742 ARRAY_SIZE(tmp));
743 if (ret)
744 return ret;
745 finfo->tx_id = tmp[0];
746 finfo->tx_irq = tmp[1];
747 finfo->tx_usr = tmp[2];
Suman Anna75288cc2014-09-10 14:20:59 -0500748
Suman Anna4899f78a2016-04-06 12:37:37 -0500749 ret = of_property_read_u32_array(child, "ti,mbox-rx", tmp,
750 ARRAY_SIZE(tmp));
751 if (ret)
752 return ret;
753 finfo->rx_id = tmp[0];
754 finfo->rx_irq = tmp[1];
755 finfo->rx_usr = tmp[2];
Suman Anna75288cc2014-09-10 14:20:59 -0500756
Suman Anna4899f78a2016-04-06 12:37:37 -0500757 finfo->name = child->name;
Dave Gerlach8e3c5952015-09-22 19:14:52 -0500758
Suman Anna4899f78a2016-04-06 12:37:37 -0500759 if (of_find_property(child, "ti,mbox-send-noirq", NULL))
760 finfo->send_no_irq = true;
761
Suman Anna75288cc2014-09-10 14:20:59 -0500762 if (finfo->tx_id >= num_fifos || finfo->rx_id >= num_fifos ||
763 finfo->tx_usr >= num_users || finfo->rx_usr >= num_users)
764 return -EINVAL;
765 }
766
Suman Anna72c1c812014-06-24 19:43:43 -0500767 mdev = devm_kzalloc(&pdev->dev, sizeof(*mdev), GFP_KERNEL);
768 if (!mdev)
769 return -ENOMEM;
770
771 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
772 mdev->mbox_base = devm_ioremap_resource(&pdev->dev, mem);
773 if (IS_ERR(mdev->mbox_base))
774 return PTR_ERR(mdev->mbox_base);
775
Suman Annaaf1d2f52016-04-06 18:37:18 -0500776 mdev->irq_ctx = devm_kzalloc(&pdev->dev, num_users * sizeof(u32),
777 GFP_KERNEL);
778 if (!mdev->irq_ctx)
779 return -ENOMEM;
780
Suman Anna5040f532014-06-24 19:43:41 -0500781 /* allocate one extra for marking end of list */
Suman Anna75288cc2014-09-10 14:20:59 -0500782 list = devm_kzalloc(&pdev->dev, (info_count + 1) * sizeof(*list),
Suman Anna5040f532014-06-24 19:43:41 -0500783 GFP_KERNEL);
784 if (!list)
785 return -ENOMEM;
786
Suman Anna8841a662014-11-03 17:05:50 -0600787 chnls = devm_kzalloc(&pdev->dev, (info_count + 1) * sizeof(*chnls),
788 GFP_KERNEL);
789 if (!chnls)
790 return -ENOMEM;
791
Suman Anna75288cc2014-09-10 14:20:59 -0500792 mboxblk = devm_kzalloc(&pdev->dev, info_count * sizeof(*mbox),
Suman Anna5040f532014-06-24 19:43:41 -0500793 GFP_KERNEL);
794 if (!mboxblk)
795 return -ENOMEM;
796
Suman Anna5040f532014-06-24 19:43:41 -0500797 mbox = mboxblk;
Suman Anna75288cc2014-09-10 14:20:59 -0500798 finfo = finfoblk;
799 for (i = 0; i < info_count; i++, finfo++) {
Suman Annabe3322e2014-06-24 19:43:42 -0500800 fifo = &mbox->tx_fifo;
Suman Anna75288cc2014-09-10 14:20:59 -0500801 fifo->msg = MAILBOX_MESSAGE(finfo->tx_id);
802 fifo->fifo_stat = MAILBOX_FIFOSTATUS(finfo->tx_id);
803 fifo->intr_bit = MAILBOX_IRQ_NOTFULL(finfo->tx_id);
804 fifo->irqenable = MAILBOX_IRQENABLE(intr_type, finfo->tx_usr);
805 fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, finfo->tx_usr);
806 fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, finfo->tx_usr);
Suman Anna5040f532014-06-24 19:43:41 -0500807
Suman Annabe3322e2014-06-24 19:43:42 -0500808 fifo = &mbox->rx_fifo;
Suman Anna75288cc2014-09-10 14:20:59 -0500809 fifo->msg = MAILBOX_MESSAGE(finfo->rx_id);
810 fifo->msg_stat = MAILBOX_MSGSTATUS(finfo->rx_id);
811 fifo->intr_bit = MAILBOX_IRQ_NEWMSG(finfo->rx_id);
812 fifo->irqenable = MAILBOX_IRQENABLE(intr_type, finfo->rx_usr);
813 fifo->irqstatus = MAILBOX_IRQSTATUS(intr_type, finfo->rx_usr);
814 fifo->irqdisable = MAILBOX_IRQDISABLE(intr_type, finfo->rx_usr);
Suman Annabe3322e2014-06-24 19:43:42 -0500815
Dave Gerlach8e3c5952015-09-22 19:14:52 -0500816 mbox->send_no_irq = finfo->send_no_irq;
Suman Annabe3322e2014-06-24 19:43:42 -0500817 mbox->intr_type = intr_type;
818
Suman Anna72c1c812014-06-24 19:43:43 -0500819 mbox->parent = mdev;
Suman Anna75288cc2014-09-10 14:20:59 -0500820 mbox->name = finfo->name;
821 mbox->irq = platform_get_irq(pdev, finfo->tx_irq);
Suman Anna5040f532014-06-24 19:43:41 -0500822 if (mbox->irq < 0)
823 return mbox->irq;
Suman Anna8841a662014-11-03 17:05:50 -0600824 mbox->chan = &chnls[i];
825 chnls[i].con_priv = mbox;
Suman Anna5040f532014-06-24 19:43:41 -0500826 list[i] = mbox++;
827 }
828
Suman Anna72c1c812014-06-24 19:43:43 -0500829 mutex_init(&mdev->cfg_lock);
830 mdev->dev = &pdev->dev;
Suman Anna75288cc2014-09-10 14:20:59 -0500831 mdev->num_users = num_users;
832 mdev->num_fifos = num_fifos;
Suman Anna2240f8a2016-04-06 18:37:17 -0500833 mdev->intr_type = intr_type;
Suman Anna72c1c812014-06-24 19:43:43 -0500834 mdev->mboxes = list;
Suman Anna8841a662014-11-03 17:05:50 -0600835
836 /* OMAP does not have a Tx-Done IRQ, but rather a Tx-Ready IRQ */
837 mdev->controller.txdone_irq = true;
838 mdev->controller.dev = mdev->dev;
839 mdev->controller.ops = &omap_mbox_chan_ops;
840 mdev->controller.chans = chnls;
841 mdev->controller.num_chans = info_count;
842 mdev->controller.of_xlate = omap_mbox_of_xlate;
Suman Anna72c1c812014-06-24 19:43:43 -0500843 ret = omap_mbox_register(mdev);
Suman Anna5040f532014-06-24 19:43:41 -0500844 if (ret)
845 return ret;
846
Suman Anna72c1c812014-06-24 19:43:43 -0500847 platform_set_drvdata(pdev, mdev);
848 pm_runtime_enable(mdev->dev);
Suman Anna5040f532014-06-24 19:43:41 -0500849
Suman Anna72c1c812014-06-24 19:43:43 -0500850 ret = pm_runtime_get_sync(mdev->dev);
Suman Anna5040f532014-06-24 19:43:41 -0500851 if (ret < 0) {
Suman Anna72c1c812014-06-24 19:43:43 -0500852 pm_runtime_put_noidle(mdev->dev);
Suman Anna5040f532014-06-24 19:43:41 -0500853 goto unregister;
854 }
855
856 /*
857 * just print the raw revision register, the format is not
858 * uniform across all SoCs
859 */
Suman Anna72c1c812014-06-24 19:43:43 -0500860 l = mbox_read_reg(mdev, MAILBOX_REVISION);
861 dev_info(mdev->dev, "omap mailbox rev 0x%x\n", l);
Suman Anna5040f532014-06-24 19:43:41 -0500862
Suman Anna72c1c812014-06-24 19:43:43 -0500863 ret = pm_runtime_put_sync(mdev->dev);
Suman Anna5040f532014-06-24 19:43:41 -0500864 if (ret < 0)
865 goto unregister;
866
Suman Anna75288cc2014-09-10 14:20:59 -0500867 devm_kfree(&pdev->dev, finfoblk);
Suman Anna5040f532014-06-24 19:43:41 -0500868 return 0;
869
870unregister:
Suman Anna72c1c812014-06-24 19:43:43 -0500871 pm_runtime_disable(mdev->dev);
872 omap_mbox_unregister(mdev);
Suman Anna5040f532014-06-24 19:43:41 -0500873 return ret;
874}
875
876static int omap_mbox_remove(struct platform_device *pdev)
877{
Suman Anna72c1c812014-06-24 19:43:43 -0500878 struct omap_mbox_device *mdev = platform_get_drvdata(pdev);
879
880 pm_runtime_disable(mdev->dev);
881 omap_mbox_unregister(mdev);
Suman Anna5040f532014-06-24 19:43:41 -0500882
883 return 0;
884}
885
886static struct platform_driver omap_mbox_driver = {
887 .probe = omap_mbox_probe,
888 .remove = omap_mbox_remove,
889 .driver = {
890 .name = "omap-mailbox",
Suman Annaaf1d2f52016-04-06 18:37:18 -0500891 .pm = &omap_mbox_pm_ops,
Suman Anna75288cc2014-09-10 14:20:59 -0500892 .of_match_table = of_match_ptr(omap_mailbox_of_match),
Suman Anna5040f532014-06-24 19:43:41 -0500893 },
894};
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800895
Hiroshi DOYUc7c158e2009-11-22 10:11:19 -0800896static int __init omap_mbox_init(void)
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800897{
Hiroshi DOYU6b233982010-05-18 16:15:32 +0300898 int err;
899
900 err = class_register(&omap_mbox_class);
901 if (err)
902 return err;
903
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000904 /* kfifo size sanity check: alignment and minimal size */
905 mbox_kfifo_size = ALIGN(mbox_kfifo_size, sizeof(mbox_msg_t));
Kanigeri, Hariab66ac32010-11-29 20:24:12 +0000906 mbox_kfifo_size = max_t(unsigned int, mbox_kfifo_size,
907 sizeof(mbox_msg_t));
Ohad Ben-Cohenb5bebe42010-05-05 15:33:09 +0000908
Suman Anna5040f532014-06-24 19:43:41 -0500909 return platform_driver_register(&omap_mbox_driver);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800910}
Hiroshi DOYU6b233982010-05-18 16:15:32 +0300911subsys_initcall(omap_mbox_init);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800912
Hiroshi DOYUc7c158e2009-11-22 10:11:19 -0800913static void __exit omap_mbox_exit(void)
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800914{
Suman Anna5040f532014-06-24 19:43:41 -0500915 platform_driver_unregister(&omap_mbox_driver);
Hiroshi DOYU6b233982010-05-18 16:15:32 +0300916 class_unregister(&omap_mbox_class);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800917}
Hiroshi DOYUc7c158e2009-11-22 10:11:19 -0800918module_exit(omap_mbox_exit);
Hiroshi DOYU340a6142006-12-07 15:43:59 -0800919
Hiroshi DOYUf48cca82009-03-23 18:07:24 -0700920MODULE_LICENSE("GPL v2");
921MODULE_DESCRIPTION("omap mailbox: interrupt driven messaging");
Ohad Ben-Cohenf3753252010-05-05 15:33:07 +0000922MODULE_AUTHOR("Toshihiro Kobayashi");
923MODULE_AUTHOR("Hiroshi DOYU");