diff options
Diffstat (limited to 'drivers/mailbox/pl320-ipc.c')
| -rw-r--r-- | drivers/mailbox/pl320-ipc.c | 71 |
1 files changed, 24 insertions, 47 deletions
diff --git a/drivers/mailbox/pl320-ipc.c b/drivers/mailbox/pl320-ipc.c index d873cbae2fbb..606f26a2a6fd 100644 --- a/drivers/mailbox/pl320-ipc.c +++ b/drivers/mailbox/pl320-ipc.c @@ -1,17 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2012 Calxeda, Inc. - * - * This program is free software; you can redistribute it and/or modify it - * under the terms and conditions of the GNU General Public License, - * version 2, as published by the Free Software Foundation. - * - * This program is distributed in the hope 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 - * this program. If not, see <http://www.gnu.org/licenses/>. */ #include <linux/types.h> #include <linux/err.h> @@ -26,7 +15,7 @@ #include <linux/device.h> #include <linux/amba/bus.h> -#include <linux/mailbox.h> +#include <linux/pl320-ipc.h> #define IPCMxSOURCE(m) ((m) * 0x40) #define IPCMxDSET(m) (((m) * 0x40) + 0x004) @@ -56,35 +45,23 @@ static DEFINE_MUTEX(ipc_m1_lock); static DECLARE_COMPLETION(ipc_completion); static ATOMIC_NOTIFIER_HEAD(ipc_notifier); -static inline void set_destination(int source, int mbox) -{ - __raw_writel(CHAN_MASK(source), ipc_base + IPCMxDSET(mbox)); - __raw_writel(CHAN_MASK(source), ipc_base + IPCMxMSET(mbox)); -} - -static inline void clear_destination(int source, int mbox) -{ - __raw_writel(CHAN_MASK(source), ipc_base + IPCMxDCLEAR(mbox)); - __raw_writel(CHAN_MASK(source), ipc_base + IPCMxMCLEAR(mbox)); -} - static void __ipc_send(int mbox, u32 *data) { int i; for (i = 0; i < 7; i++) - __raw_writel(data[i], ipc_base + IPCMxDR(mbox, i)); - __raw_writel(0x1, ipc_base + IPCMxSEND(mbox)); + writel_relaxed(data[i], ipc_base + IPCMxDR(mbox, i)); + writel_relaxed(0x1, ipc_base + IPCMxSEND(mbox)); } static u32 __ipc_rcv(int mbox, u32 *data) { int i; for (i = 0; i < 7; i++) - data[i] = __raw_readl(ipc_base + IPCMxDR(mbox, i)); + data[i] = readl_relaxed(ipc_base + IPCMxDR(mbox, i)); return data[1]; } -/* blocking implmentation from the A9 side, not usuable in interrupts! */ +/* blocking implementation from the A9 side, not usable in interrupts! */ int pl320_ipc_transmit(u32 *data) { int ret; @@ -112,15 +89,15 @@ static irqreturn_t ipc_handler(int irq, void *dev) u32 irq_stat; u32 data[7]; - irq_stat = __raw_readl(ipc_base + IPCMMIS(1)); + irq_stat = readl_relaxed(ipc_base + IPCMMIS(1)); if (irq_stat & MBOX_MASK(IPC_TX_MBOX)) { - __raw_writel(0, ipc_base + IPCMxSEND(IPC_TX_MBOX)); + writel_relaxed(0, ipc_base + IPCMxSEND(IPC_TX_MBOX)); complete(&ipc_completion); } if (irq_stat & MBOX_MASK(IPC_RX_MBOX)) { __ipc_rcv(IPC_RX_MBOX, data); atomic_notifier_call_chain(&ipc_notifier, data[0], data + 1); - __raw_writel(2, ipc_base + IPCMxSEND(IPC_RX_MBOX)); + writel_relaxed(2, ipc_base + IPCMxSEND(IPC_RX_MBOX)); } return IRQ_HANDLED; @@ -146,7 +123,7 @@ static int pl320_probe(struct amba_device *adev, const struct amba_id *id) if (ipc_base == NULL) return -ENOMEM; - __raw_writel(0, ipc_base + IPCMxSEND(IPC_TX_MBOX)); + writel_relaxed(0, ipc_base + IPCMxSEND(IPC_TX_MBOX)); ipc_irq = adev->irq[0]; ret = request_irq(ipc_irq, ipc_handler, 0, dev_name(&adev->dev), NULL); @@ -154,20 +131,20 @@ static int pl320_probe(struct amba_device *adev, const struct amba_id *id) goto err; /* Init slow mailbox */ - __raw_writel(CHAN_MASK(A9_SOURCE), - ipc_base + IPCMxSOURCE(IPC_TX_MBOX)); - __raw_writel(CHAN_MASK(M3_SOURCE), - ipc_base + IPCMxDSET(IPC_TX_MBOX)); - __raw_writel(CHAN_MASK(M3_SOURCE) | CHAN_MASK(A9_SOURCE), - ipc_base + IPCMxMSET(IPC_TX_MBOX)); + writel_relaxed(CHAN_MASK(A9_SOURCE), + ipc_base + IPCMxSOURCE(IPC_TX_MBOX)); + writel_relaxed(CHAN_MASK(M3_SOURCE), + ipc_base + IPCMxDSET(IPC_TX_MBOX)); + writel_relaxed(CHAN_MASK(M3_SOURCE) | CHAN_MASK(A9_SOURCE), + ipc_base + IPCMxMSET(IPC_TX_MBOX)); /* Init receive mailbox */ - __raw_writel(CHAN_MASK(M3_SOURCE), - ipc_base + IPCMxSOURCE(IPC_RX_MBOX)); - __raw_writel(CHAN_MASK(A9_SOURCE), - ipc_base + IPCMxDSET(IPC_RX_MBOX)); - __raw_writel(CHAN_MASK(M3_SOURCE) | CHAN_MASK(A9_SOURCE), - ipc_base + IPCMxMSET(IPC_RX_MBOX)); + writel_relaxed(CHAN_MASK(M3_SOURCE), + ipc_base + IPCMxSOURCE(IPC_RX_MBOX)); + writel_relaxed(CHAN_MASK(A9_SOURCE), + ipc_base + IPCMxDSET(IPC_RX_MBOX)); + writel_relaxed(CHAN_MASK(M3_SOURCE) | CHAN_MASK(A9_SOURCE), + ipc_base + IPCMxMSET(IPC_RX_MBOX)); return 0; err: @@ -175,7 +152,7 @@ err: return ret; } -static struct amba_id pl320_ids[] = { +static const struct amba_id pl320_ids[] = { { .id = 0x00041320, .mask = 0x000fffff, @@ -195,4 +172,4 @@ static int __init ipc_init(void) { return amba_driver_register(&pl320_driver); } -module_init(ipc_init); +subsys_initcall(ipc_init); |