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Message-Id: <20210120131859.2056308-2-arnd@kernel.org>
Date: Wed, 20 Jan 2021 14:18:57 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
dmaengine@...r.kernel.org, Vinod Koul <vkoul@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>, Barry Song <baohua@...nel.org>
Subject: [PATCH 1/3] dmaengine: remove sirfsoc driver
From: Arnd Bergmann <arnd@...db.de>
The CSR SiRF prima2/atlas platforms are getting removed, so this driver
is no longer needed.
Cc: Barry Song <baohua@...nel.org>
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
.../devicetree/bindings/dma/sirfsoc-dma.txt | 44 -
drivers/dma/Kconfig | 7 -
drivers/dma/Makefile | 1 -
drivers/dma/sirf-dma.c | 1170 -----------------
include/linux/sirfsoc_dma.h | 7 -
5 files changed, 1229 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/dma/sirfsoc-dma.txt
delete mode 100644 drivers/dma/sirf-dma.c
delete mode 100644 include/linux/sirfsoc_dma.h
diff --git a/Documentation/devicetree/bindings/dma/sirfsoc-dma.txt b/Documentation/devicetree/bindings/dma/sirfsoc-dma.txt
deleted file mode 100644
index ccd52d6a231a..000000000000
--- a/Documentation/devicetree/bindings/dma/sirfsoc-dma.txt
+++ /dev/null
@@ -1,44 +0,0 @@
-* CSR SiRFSoC DMA controller
-
-See dma.txt first
-
-Required properties:
-- compatible: Should be "sirf,prima2-dmac", "sirf,atlas7-dmac" or
- "sirf,atlas7-dmac-v2"
-- reg: Should contain DMA registers location and length.
-- interrupts: Should contain one interrupt shared by all channel
-- #dma-cells: must be <1>. used to represent the number of integer
- cells in the dmas property of client device.
-- clocks: clock required
-
-Example:
-
-Controller:
-dmac0: dma-controller@...b0000 {
- compatible = "sirf,prima2-dmac";
- reg = <0xb00b0000 0x10000>;
- interrupts = <12>;
- clocks = <&clks 24>;
- #dma-cells = <1>;
-};
-
-
-Client:
-Fill the specific dma request line in dmas. In the below example, spi0 read
-channel request line is 9 of the 2nd dma controller, while write channel uses
-4 of the 2nd dma controller; spi1 read channel request line is 12 of the 1st
-dma controller, while write channel uses 13 of the 1st dma controller:
-
-spi0: spi@...d0000 {
- compatible = "sirf,prima2-spi";
- dmas = <&dmac1 9>,
- <&dmac1 4>;
- dma-names = "rx", "tx";
-};
-
-spi1: spi@...70000 {
- compatible = "sirf,prima2-spi";
- dmas = <&dmac0 12>,
- <&dmac0 13>;
- dma-names = "rx", "tx";
-};
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index d242c7632621..1935cf39f753 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -519,13 +519,6 @@ config PLX_DMA
These are exposed via extra functions on the switch's
upstream port. Each function exposes one DMA channel.
-config SIRF_DMA
- tristate "CSR SiRFprimaII/SiRFmarco DMA support"
- depends on ARCH_SIRF
- select DMA_ENGINE
- help
- Enable support for the CSR SiRFprimaII DMA engine.
-
config STE_DMA40
bool "ST-Ericsson DMA40 support"
depends on ARCH_U8500
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 948a8da05f8b..93327554560e 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -65,7 +65,6 @@ obj-$(CONFIG_PPC_BESTCOMM) += bestcomm/
obj-$(CONFIG_PXA_DMA) += pxa_dma.o
obj-$(CONFIG_RENESAS_DMA) += sh/
obj-$(CONFIG_SF_PDMA) += sf-pdma/
-obj-$(CONFIG_SIRF_DMA) += sirf-dma.o
obj-$(CONFIG_STE_DMA40) += ste_dma40.o ste_dma40_ll.o
obj-$(CONFIG_STM32_DMA) += stm32-dma.o
obj-$(CONFIG_STM32_DMAMUX) += stm32-dmamux.o
diff --git a/drivers/dma/sirf-dma.c b/drivers/dma/sirf-dma.c
deleted file mode 100644
index a5c2843384fd..000000000000
--- a/drivers/dma/sirf-dma.c
+++ /dev/null
@@ -1,1170 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * DMA controller driver for CSR SiRFprimaII
- *
- * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
- */
-
-#include <linux/module.h>
-#include <linux/dmaengine.h>
-#include <linux/dma-mapping.h>
-#include <linux/pm_runtime.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-#include <linux/of_irq.h>
-#include <linux/of_address.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-#include <linux/clk.h>
-#include <linux/of_dma.h>
-#include <linux/sirfsoc_dma.h>
-
-#include "dmaengine.h"
-
-#define SIRFSOC_DMA_VER_A7V1 1
-#define SIRFSOC_DMA_VER_A7V2 2
-#define SIRFSOC_DMA_VER_A6 4
-
-#define SIRFSOC_DMA_DESCRIPTORS 16
-#define SIRFSOC_DMA_CHANNELS 16
-#define SIRFSOC_DMA_TABLE_NUM 256
-
-#define SIRFSOC_DMA_CH_ADDR 0x00
-#define SIRFSOC_DMA_CH_XLEN 0x04
-#define SIRFSOC_DMA_CH_YLEN 0x08
-#define SIRFSOC_DMA_CH_CTRL 0x0C
-
-#define SIRFSOC_DMA_WIDTH_0 0x100
-#define SIRFSOC_DMA_CH_VALID 0x140
-#define SIRFSOC_DMA_CH_INT 0x144
-#define SIRFSOC_DMA_INT_EN 0x148
-#define SIRFSOC_DMA_INT_EN_CLR 0x14C
-#define SIRFSOC_DMA_CH_LOOP_CTRL 0x150
-#define SIRFSOC_DMA_CH_LOOP_CTRL_CLR 0x154
-#define SIRFSOC_DMA_WIDTH_ATLAS7 0x10
-#define SIRFSOC_DMA_VALID_ATLAS7 0x14
-#define SIRFSOC_DMA_INT_ATLAS7 0x18
-#define SIRFSOC_DMA_INT_EN_ATLAS7 0x1c
-#define SIRFSOC_DMA_LOOP_CTRL_ATLAS7 0x20
-#define SIRFSOC_DMA_CUR_DATA_ADDR 0x34
-#define SIRFSOC_DMA_MUL_ATLAS7 0x38
-#define SIRFSOC_DMA_CH_LOOP_CTRL_ATLAS7 0x158
-#define SIRFSOC_DMA_CH_LOOP_CTRL_CLR_ATLAS7 0x15C
-#define SIRFSOC_DMA_IOBG_SCMD_EN 0x800
-#define SIRFSOC_DMA_EARLY_RESP_SET 0x818
-#define SIRFSOC_DMA_EARLY_RESP_CLR 0x81C
-
-#define SIRFSOC_DMA_MODE_CTRL_BIT 4
-#define SIRFSOC_DMA_DIR_CTRL_BIT 5
-#define SIRFSOC_DMA_MODE_CTRL_BIT_ATLAS7 2
-#define SIRFSOC_DMA_CHAIN_CTRL_BIT_ATLAS7 3
-#define SIRFSOC_DMA_DIR_CTRL_BIT_ATLAS7 4
-#define SIRFSOC_DMA_TAB_NUM_ATLAS7 7
-#define SIRFSOC_DMA_CHAIN_INT_BIT_ATLAS7 5
-#define SIRFSOC_DMA_CHAIN_FLAG_SHIFT_ATLAS7 25
-#define SIRFSOC_DMA_CHAIN_ADDR_SHIFT 32
-
-#define SIRFSOC_DMA_INT_FINI_INT_ATLAS7 BIT(0)
-#define SIRFSOC_DMA_INT_CNT_INT_ATLAS7 BIT(1)
-#define SIRFSOC_DMA_INT_PAU_INT_ATLAS7 BIT(2)
-#define SIRFSOC_DMA_INT_LOOP_INT_ATLAS7 BIT(3)
-#define SIRFSOC_DMA_INT_INV_INT_ATLAS7 BIT(4)
-#define SIRFSOC_DMA_INT_END_INT_ATLAS7 BIT(5)
-#define SIRFSOC_DMA_INT_ALL_ATLAS7 0x3F
-
-/* xlen and dma_width register is in 4 bytes boundary */
-#define SIRFSOC_DMA_WORD_LEN 4
-#define SIRFSOC_DMA_XLEN_MAX_V1 0x800
-#define SIRFSOC_DMA_XLEN_MAX_V2 0x1000
-
-struct sirfsoc_dma_desc {
- struct dma_async_tx_descriptor desc;
- struct list_head node;
-
- /* SiRFprimaII 2D-DMA parameters */
-
- int xlen; /* DMA xlen */
- int ylen; /* DMA ylen */
- int width; /* DMA width */
- int dir;
- bool cyclic; /* is loop DMA? */
- bool chain; /* is chain DMA? */
- u32 addr; /* DMA buffer address */
- u64 chain_table[SIRFSOC_DMA_TABLE_NUM]; /* chain tbl */
-};
-
-struct sirfsoc_dma_chan {
- struct dma_chan chan;
- struct list_head free;
- struct list_head prepared;
- struct list_head queued;
- struct list_head active;
- struct list_head completed;
- unsigned long happened_cyclic;
- unsigned long completed_cyclic;
-
- /* Lock for this structure */
- spinlock_t lock;
-
- int mode;
-};
-
-struct sirfsoc_dma_regs {
- u32 ctrl[SIRFSOC_DMA_CHANNELS];
- u32 interrupt_en;
-};
-
-struct sirfsoc_dma {
- struct dma_device dma;
- struct tasklet_struct tasklet;
- struct sirfsoc_dma_chan channels[SIRFSOC_DMA_CHANNELS];
- void __iomem *base;
- int irq;
- struct clk *clk;
- int type;
- void (*exec_desc)(struct sirfsoc_dma_desc *sdesc,
- int cid, int burst_mode, void __iomem *base);
- struct sirfsoc_dma_regs regs_save;
-};
-
-struct sirfsoc_dmadata {
- void (*exec)(struct sirfsoc_dma_desc *sdesc,
- int cid, int burst_mode, void __iomem *base);
- int type;
-};
-
-enum sirfsoc_dma_chain_flag {
- SIRFSOC_DMA_CHAIN_NORMAL = 0x01,
- SIRFSOC_DMA_CHAIN_PAUSE = 0x02,
- SIRFSOC_DMA_CHAIN_LOOP = 0x03,
- SIRFSOC_DMA_CHAIN_END = 0x04
-};
-
-#define DRV_NAME "sirfsoc_dma"
-
-static int sirfsoc_dma_runtime_suspend(struct device *dev);
-
-/* Convert struct dma_chan to struct sirfsoc_dma_chan */
-static inline
-struct sirfsoc_dma_chan *dma_chan_to_sirfsoc_dma_chan(struct dma_chan *c)
-{
- return container_of(c, struct sirfsoc_dma_chan, chan);
-}
-
-/* Convert struct dma_chan to struct sirfsoc_dma */
-static inline struct sirfsoc_dma *dma_chan_to_sirfsoc_dma(struct dma_chan *c)
-{
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(c);
- return container_of(schan, struct sirfsoc_dma, channels[c->chan_id]);
-}
-
-static void sirfsoc_dma_execute_hw_a7v2(struct sirfsoc_dma_desc *sdesc,
- int cid, int burst_mode, void __iomem *base)
-{
- if (sdesc->chain) {
- /* DMA v2 HW chain mode */
- writel_relaxed((sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT_ATLAS7) |
- (sdesc->chain <<
- SIRFSOC_DMA_CHAIN_CTRL_BIT_ATLAS7) |
- (0x8 << SIRFSOC_DMA_TAB_NUM_ATLAS7) | 0x3,
- base + SIRFSOC_DMA_CH_CTRL);
- } else {
- /* DMA v2 legacy mode */
- writel_relaxed(sdesc->xlen, base + SIRFSOC_DMA_CH_XLEN);
- writel_relaxed(sdesc->ylen, base + SIRFSOC_DMA_CH_YLEN);
- writel_relaxed(sdesc->width, base + SIRFSOC_DMA_WIDTH_ATLAS7);
- writel_relaxed((sdesc->width*((sdesc->ylen+1)>>1)),
- base + SIRFSOC_DMA_MUL_ATLAS7);
- writel_relaxed((sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT_ATLAS7) |
- (sdesc->chain <<
- SIRFSOC_DMA_CHAIN_CTRL_BIT_ATLAS7) |
- 0x3, base + SIRFSOC_DMA_CH_CTRL);
- }
- writel_relaxed(sdesc->chain ? SIRFSOC_DMA_INT_END_INT_ATLAS7 :
- (SIRFSOC_DMA_INT_FINI_INT_ATLAS7 |
- SIRFSOC_DMA_INT_LOOP_INT_ATLAS7),
- base + SIRFSOC_DMA_INT_EN_ATLAS7);
- writel(sdesc->addr, base + SIRFSOC_DMA_CH_ADDR);
- if (sdesc->cyclic)
- writel(0x10001, base + SIRFSOC_DMA_LOOP_CTRL_ATLAS7);
-}
-
-static void sirfsoc_dma_execute_hw_a7v1(struct sirfsoc_dma_desc *sdesc,
- int cid, int burst_mode, void __iomem *base)
-{
- writel_relaxed(1, base + SIRFSOC_DMA_IOBG_SCMD_EN);
- writel_relaxed((1 << cid), base + SIRFSOC_DMA_EARLY_RESP_SET);
- writel_relaxed(sdesc->width, base + SIRFSOC_DMA_WIDTH_0 + cid * 4);
- writel_relaxed(cid | (burst_mode << SIRFSOC_DMA_MODE_CTRL_BIT) |
- (sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT),
- base + cid * 0x10 + SIRFSOC_DMA_CH_CTRL);
- writel_relaxed(sdesc->xlen, base + cid * 0x10 + SIRFSOC_DMA_CH_XLEN);
- writel_relaxed(sdesc->ylen, base + cid * 0x10 + SIRFSOC_DMA_CH_YLEN);
- writel_relaxed(readl_relaxed(base + SIRFSOC_DMA_INT_EN) |
- (1 << cid), base + SIRFSOC_DMA_INT_EN);
- writel(sdesc->addr >> 2, base + cid * 0x10 + SIRFSOC_DMA_CH_ADDR);
- if (sdesc->cyclic) {
- writel((1 << cid) | 1 << (cid + 16) |
- readl_relaxed(base + SIRFSOC_DMA_CH_LOOP_CTRL_ATLAS7),
- base + SIRFSOC_DMA_CH_LOOP_CTRL_ATLAS7);
- }
-
-}
-
-static void sirfsoc_dma_execute_hw_a6(struct sirfsoc_dma_desc *sdesc,
- int cid, int burst_mode, void __iomem *base)
-{
- writel_relaxed(sdesc->width, base + SIRFSOC_DMA_WIDTH_0 + cid * 4);
- writel_relaxed(cid | (burst_mode << SIRFSOC_DMA_MODE_CTRL_BIT) |
- (sdesc->dir << SIRFSOC_DMA_DIR_CTRL_BIT),
- base + cid * 0x10 + SIRFSOC_DMA_CH_CTRL);
- writel_relaxed(sdesc->xlen, base + cid * 0x10 + SIRFSOC_DMA_CH_XLEN);
- writel_relaxed(sdesc->ylen, base + cid * 0x10 + SIRFSOC_DMA_CH_YLEN);
- writel_relaxed(readl_relaxed(base + SIRFSOC_DMA_INT_EN) |
- (1 << cid), base + SIRFSOC_DMA_INT_EN);
- writel(sdesc->addr >> 2, base + cid * 0x10 + SIRFSOC_DMA_CH_ADDR);
- if (sdesc->cyclic) {
- writel((1 << cid) | 1 << (cid + 16) |
- readl_relaxed(base + SIRFSOC_DMA_CH_LOOP_CTRL),
- base + SIRFSOC_DMA_CH_LOOP_CTRL);
- }
-
-}
-
-/* Execute all queued DMA descriptors */
-static void sirfsoc_dma_execute(struct sirfsoc_dma_chan *schan)
-{
- struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(&schan->chan);
- int cid = schan->chan.chan_id;
- struct sirfsoc_dma_desc *sdesc = NULL;
- void __iomem *base;
-
- /*
- * lock has been held by functions calling this, so we don't hold
- * lock again
- */
- base = sdma->base;
- sdesc = list_first_entry(&schan->queued, struct sirfsoc_dma_desc,
- node);
- /* Move the first queued descriptor to active list */
- list_move_tail(&sdesc->node, &schan->active);
-
- if (sdma->type == SIRFSOC_DMA_VER_A7V2)
- cid = 0;
-
- /* Start the DMA transfer */
- sdma->exec_desc(sdesc, cid, schan->mode, base);
-
- if (sdesc->cyclic)
- schan->happened_cyclic = schan->completed_cyclic = 0;
-}
-
-/* Interrupt handler */
-static irqreturn_t sirfsoc_dma_irq(int irq, void *data)
-{
- struct sirfsoc_dma *sdma = data;
- struct sirfsoc_dma_chan *schan;
- struct sirfsoc_dma_desc *sdesc = NULL;
- u32 is;
- bool chain;
- int ch;
- void __iomem *reg;
-
- switch (sdma->type) {
- case SIRFSOC_DMA_VER_A6:
- case SIRFSOC_DMA_VER_A7V1:
- is = readl(sdma->base + SIRFSOC_DMA_CH_INT);
- reg = sdma->base + SIRFSOC_DMA_CH_INT;
- while ((ch = fls(is) - 1) >= 0) {
- is &= ~(1 << ch);
- writel_relaxed(1 << ch, reg);
- schan = &sdma->channels[ch];
- spin_lock(&schan->lock);
- sdesc = list_first_entry(&schan->active,
- struct sirfsoc_dma_desc, node);
- if (!sdesc->cyclic) {
- /* Execute queued descriptors */
- list_splice_tail_init(&schan->active,
- &schan->completed);
- dma_cookie_complete(&sdesc->desc);
- if (!list_empty(&schan->queued))
- sirfsoc_dma_execute(schan);
- } else
- schan->happened_cyclic++;
- spin_unlock(&schan->lock);
- }
- break;
-
- case SIRFSOC_DMA_VER_A7V2:
- is = readl(sdma->base + SIRFSOC_DMA_INT_ATLAS7);
-
- reg = sdma->base + SIRFSOC_DMA_INT_ATLAS7;
- writel_relaxed(SIRFSOC_DMA_INT_ALL_ATLAS7, reg);
- schan = &sdma->channels[0];
- spin_lock(&schan->lock);
- sdesc = list_first_entry(&schan->active,
- struct sirfsoc_dma_desc, node);
- if (!sdesc->cyclic) {
- chain = sdesc->chain;
- if ((chain && (is & SIRFSOC_DMA_INT_END_INT_ATLAS7)) ||
- (!chain &&
- (is & SIRFSOC_DMA_INT_FINI_INT_ATLAS7))) {
- /* Execute queued descriptors */
- list_splice_tail_init(&schan->active,
- &schan->completed);
- dma_cookie_complete(&sdesc->desc);
- if (!list_empty(&schan->queued))
- sirfsoc_dma_execute(schan);
- }
- } else if (sdesc->cyclic && (is &
- SIRFSOC_DMA_INT_LOOP_INT_ATLAS7))
- schan->happened_cyclic++;
-
- spin_unlock(&schan->lock);
- break;
-
- default:
- break;
- }
-
- /* Schedule tasklet */
- tasklet_schedule(&sdma->tasklet);
-
- return IRQ_HANDLED;
-}
-
-/* process completed descriptors */
-static void sirfsoc_dma_process_completed(struct sirfsoc_dma *sdma)
-{
- dma_cookie_t last_cookie = 0;
- struct sirfsoc_dma_chan *schan;
- struct sirfsoc_dma_desc *sdesc;
- struct dma_async_tx_descriptor *desc;
- unsigned long flags;
- unsigned long happened_cyclic;
- LIST_HEAD(list);
- int i;
-
- for (i = 0; i < sdma->dma.chancnt; i++) {
- schan = &sdma->channels[i];
-
- /* Get all completed descriptors */
- spin_lock_irqsave(&schan->lock, flags);
- if (!list_empty(&schan->completed)) {
- list_splice_tail_init(&schan->completed, &list);
- spin_unlock_irqrestore(&schan->lock, flags);
-
- /* Execute callbacks and run dependencies */
- list_for_each_entry(sdesc, &list, node) {
- desc = &sdesc->desc;
-
- dmaengine_desc_get_callback_invoke(desc, NULL);
- last_cookie = desc->cookie;
- dma_run_dependencies(desc);
- }
-
- /* Free descriptors */
- spin_lock_irqsave(&schan->lock, flags);
- list_splice_tail_init(&list, &schan->free);
- schan->chan.completed_cookie = last_cookie;
- spin_unlock_irqrestore(&schan->lock, flags);
- } else {
- if (list_empty(&schan->active)) {
- spin_unlock_irqrestore(&schan->lock, flags);
- continue;
- }
-
- /* for cyclic channel, desc is always in active list */
- sdesc = list_first_entry(&schan->active,
- struct sirfsoc_dma_desc, node);
-
- /* cyclic DMA */
- happened_cyclic = schan->happened_cyclic;
- spin_unlock_irqrestore(&schan->lock, flags);
-
- desc = &sdesc->desc;
- while (happened_cyclic != schan->completed_cyclic) {
- dmaengine_desc_get_callback_invoke(desc, NULL);
- schan->completed_cyclic++;
- }
- }
- }
-}
-
-/* DMA Tasklet */
-static void sirfsoc_dma_tasklet(struct tasklet_struct *t)
-{
- struct sirfsoc_dma *sdma = from_tasklet(sdma, t, tasklet);
-
- sirfsoc_dma_process_completed(sdma);
-}
-
-/* Submit descriptor to hardware */
-static dma_cookie_t sirfsoc_dma_tx_submit(struct dma_async_tx_descriptor *txd)
-{
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(txd->chan);
- struct sirfsoc_dma_desc *sdesc;
- unsigned long flags;
- dma_cookie_t cookie;
-
- sdesc = container_of(txd, struct sirfsoc_dma_desc, desc);
-
- spin_lock_irqsave(&schan->lock, flags);
-
- /* Move descriptor to queue */
- list_move_tail(&sdesc->node, &schan->queued);
-
- cookie = dma_cookie_assign(txd);
-
- spin_unlock_irqrestore(&schan->lock, flags);
-
- return cookie;
-}
-
-static int sirfsoc_dma_slave_config(struct dma_chan *chan,
- struct dma_slave_config *config)
-{
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- unsigned long flags;
-
- if ((config->src_addr_width != DMA_SLAVE_BUSWIDTH_4_BYTES) ||
- (config->dst_addr_width != DMA_SLAVE_BUSWIDTH_4_BYTES))
- return -EINVAL;
-
- spin_lock_irqsave(&schan->lock, flags);
- schan->mode = (config->src_maxburst == 4 ? 1 : 0);
- spin_unlock_irqrestore(&schan->lock, flags);
-
- return 0;
-}
-
-static int sirfsoc_dma_terminate_all(struct dma_chan *chan)
-{
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(&schan->chan);
- int cid = schan->chan.chan_id;
- unsigned long flags;
-
- spin_lock_irqsave(&schan->lock, flags);
-
- switch (sdma->type) {
- case SIRFSOC_DMA_VER_A7V1:
- writel_relaxed(1 << cid, sdma->base + SIRFSOC_DMA_INT_EN_CLR);
- writel_relaxed(1 << cid, sdma->base + SIRFSOC_DMA_CH_INT);
- writel_relaxed((1 << cid) | 1 << (cid + 16),
- sdma->base +
- SIRFSOC_DMA_CH_LOOP_CTRL_CLR_ATLAS7);
- writel_relaxed(1 << cid, sdma->base + SIRFSOC_DMA_CH_VALID);
- break;
- case SIRFSOC_DMA_VER_A7V2:
- writel_relaxed(0, sdma->base + SIRFSOC_DMA_INT_EN_ATLAS7);
- writel_relaxed(SIRFSOC_DMA_INT_ALL_ATLAS7,
- sdma->base + SIRFSOC_DMA_INT_ATLAS7);
- writel_relaxed(0, sdma->base + SIRFSOC_DMA_LOOP_CTRL_ATLAS7);
- writel_relaxed(0, sdma->base + SIRFSOC_DMA_VALID_ATLAS7);
- break;
- case SIRFSOC_DMA_VER_A6:
- writel_relaxed(readl_relaxed(sdma->base + SIRFSOC_DMA_INT_EN) &
- ~(1 << cid), sdma->base + SIRFSOC_DMA_INT_EN);
- writel_relaxed(readl_relaxed(sdma->base +
- SIRFSOC_DMA_CH_LOOP_CTRL) &
- ~((1 << cid) | 1 << (cid + 16)),
- sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
- writel_relaxed(1 << cid, sdma->base + SIRFSOC_DMA_CH_VALID);
- break;
- default:
- break;
- }
-
- list_splice_tail_init(&schan->active, &schan->free);
- list_splice_tail_init(&schan->queued, &schan->free);
-
- spin_unlock_irqrestore(&schan->lock, flags);
-
- return 0;
-}
-
-static int sirfsoc_dma_pause_chan(struct dma_chan *chan)
-{
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(&schan->chan);
- int cid = schan->chan.chan_id;
- unsigned long flags;
-
- spin_lock_irqsave(&schan->lock, flags);
-
- switch (sdma->type) {
- case SIRFSOC_DMA_VER_A7V1:
- writel_relaxed((1 << cid) | 1 << (cid + 16),
- sdma->base +
- SIRFSOC_DMA_CH_LOOP_CTRL_CLR_ATLAS7);
- break;
- case SIRFSOC_DMA_VER_A7V2:
- writel_relaxed(0, sdma->base + SIRFSOC_DMA_LOOP_CTRL_ATLAS7);
- break;
- case SIRFSOC_DMA_VER_A6:
- writel_relaxed(readl_relaxed(sdma->base +
- SIRFSOC_DMA_CH_LOOP_CTRL) &
- ~((1 << cid) | 1 << (cid + 16)),
- sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
- break;
-
- default:
- break;
- }
-
- spin_unlock_irqrestore(&schan->lock, flags);
-
- return 0;
-}
-
-static int sirfsoc_dma_resume_chan(struct dma_chan *chan)
-{
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(&schan->chan);
- int cid = schan->chan.chan_id;
- unsigned long flags;
-
- spin_lock_irqsave(&schan->lock, flags);
- switch (sdma->type) {
- case SIRFSOC_DMA_VER_A7V1:
- writel_relaxed((1 << cid) | 1 << (cid + 16),
- sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL_ATLAS7);
- break;
- case SIRFSOC_DMA_VER_A7V2:
- writel_relaxed(0x10001,
- sdma->base + SIRFSOC_DMA_LOOP_CTRL_ATLAS7);
- break;
- case SIRFSOC_DMA_VER_A6:
- writel_relaxed(readl_relaxed(sdma->base +
- SIRFSOC_DMA_CH_LOOP_CTRL) |
- ((1 << cid) | 1 << (cid + 16)),
- sdma->base + SIRFSOC_DMA_CH_LOOP_CTRL);
- break;
-
- default:
- break;
- }
-
- spin_unlock_irqrestore(&schan->lock, flags);
-
- return 0;
-}
-
-/* Alloc channel resources */
-static int sirfsoc_dma_alloc_chan_resources(struct dma_chan *chan)
-{
- struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(chan);
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- struct sirfsoc_dma_desc *sdesc;
- unsigned long flags;
- LIST_HEAD(descs);
- int i;
-
- pm_runtime_get_sync(sdma->dma.dev);
-
- /* Alloc descriptors for this channel */
- for (i = 0; i < SIRFSOC_DMA_DESCRIPTORS; i++) {
- sdesc = kzalloc(sizeof(*sdesc), GFP_KERNEL);
- if (!sdesc) {
- dev_notice(sdma->dma.dev, "Memory allocation error. "
- "Allocated only %u descriptors\n", i);
- break;
- }
-
- dma_async_tx_descriptor_init(&sdesc->desc, chan);
- sdesc->desc.flags = DMA_CTRL_ACK;
- sdesc->desc.tx_submit = sirfsoc_dma_tx_submit;
-
- list_add_tail(&sdesc->node, &descs);
- }
-
- /* Return error only if no descriptors were allocated */
- if (i == 0)
- return -ENOMEM;
-
- spin_lock_irqsave(&schan->lock, flags);
-
- list_splice_tail_init(&descs, &schan->free);
- spin_unlock_irqrestore(&schan->lock, flags);
-
- return i;
-}
-
-/* Free channel resources */
-static void sirfsoc_dma_free_chan_resources(struct dma_chan *chan)
-{
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(chan);
- struct sirfsoc_dma_desc *sdesc, *tmp;
- unsigned long flags;
- LIST_HEAD(descs);
-
- spin_lock_irqsave(&schan->lock, flags);
-
- /* Channel must be idle */
- BUG_ON(!list_empty(&schan->prepared));
- BUG_ON(!list_empty(&schan->queued));
- BUG_ON(!list_empty(&schan->active));
- BUG_ON(!list_empty(&schan->completed));
-
- /* Move data */
- list_splice_tail_init(&schan->free, &descs);
-
- spin_unlock_irqrestore(&schan->lock, flags);
-
- /* Free descriptors */
- list_for_each_entry_safe(sdesc, tmp, &descs, node)
- kfree(sdesc);
-
- pm_runtime_put(sdma->dma.dev);
-}
-
-/* Send pending descriptor to hardware */
-static void sirfsoc_dma_issue_pending(struct dma_chan *chan)
-{
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- unsigned long flags;
-
- spin_lock_irqsave(&schan->lock, flags);
-
- if (list_empty(&schan->active) && !list_empty(&schan->queued))
- sirfsoc_dma_execute(schan);
-
- spin_unlock_irqrestore(&schan->lock, flags);
-}
-
-/* Check request completion status */
-static enum dma_status
-sirfsoc_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie,
- struct dma_tx_state *txstate)
-{
- struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(chan);
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- unsigned long flags;
- enum dma_status ret;
- struct sirfsoc_dma_desc *sdesc;
- int cid = schan->chan.chan_id;
- unsigned long dma_pos;
- unsigned long dma_request_bytes;
- unsigned long residue;
-
- spin_lock_irqsave(&schan->lock, flags);
-
- if (list_empty(&schan->active)) {
- ret = dma_cookie_status(chan, cookie, txstate);
- dma_set_residue(txstate, 0);
- spin_unlock_irqrestore(&schan->lock, flags);
- return ret;
- }
- sdesc = list_first_entry(&schan->active, struct sirfsoc_dma_desc, node);
- if (sdesc->cyclic)
- dma_request_bytes = (sdesc->xlen + 1) * (sdesc->ylen + 1) *
- (sdesc->width * SIRFSOC_DMA_WORD_LEN);
- else
- dma_request_bytes = sdesc->xlen * SIRFSOC_DMA_WORD_LEN;
-
- ret = dma_cookie_status(chan, cookie, txstate);
-
- if (sdma->type == SIRFSOC_DMA_VER_A7V2)
- cid = 0;
-
- if (sdma->type == SIRFSOC_DMA_VER_A7V2) {
- dma_pos = readl_relaxed(sdma->base + SIRFSOC_DMA_CUR_DATA_ADDR);
- } else {
- dma_pos = readl_relaxed(
- sdma->base + cid * 0x10 + SIRFSOC_DMA_CH_ADDR) << 2;
- }
-
- residue = dma_request_bytes - (dma_pos - sdesc->addr);
- dma_set_residue(txstate, residue);
-
- spin_unlock_irqrestore(&schan->lock, flags);
-
- return ret;
-}
-
-static struct dma_async_tx_descriptor *sirfsoc_dma_prep_interleaved(
- struct dma_chan *chan, struct dma_interleaved_template *xt,
- unsigned long flags)
-{
- struct sirfsoc_dma *sdma = dma_chan_to_sirfsoc_dma(chan);
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- struct sirfsoc_dma_desc *sdesc = NULL;
- unsigned long iflags;
- int ret;
-
- if ((xt->dir != DMA_MEM_TO_DEV) && (xt->dir != DMA_DEV_TO_MEM)) {
- ret = -EINVAL;
- goto err_dir;
- }
-
- /* Get free descriptor */
- spin_lock_irqsave(&schan->lock, iflags);
- if (!list_empty(&schan->free)) {
- sdesc = list_first_entry(&schan->free, struct sirfsoc_dma_desc,
- node);
- list_del(&sdesc->node);
- }
- spin_unlock_irqrestore(&schan->lock, iflags);
-
- if (!sdesc) {
- /* try to free completed descriptors */
- sirfsoc_dma_process_completed(sdma);
- ret = 0;
- goto no_desc;
- }
-
- /* Place descriptor in prepared list */
- spin_lock_irqsave(&schan->lock, iflags);
-
- /*
- * Number of chunks in a frame can only be 1 for prima2
- * and ylen (number of frame - 1) must be at least 0
- */
- if ((xt->frame_size == 1) && (xt->numf > 0)) {
- sdesc->cyclic = 0;
- sdesc->xlen = xt->sgl[0].size / SIRFSOC_DMA_WORD_LEN;
- sdesc->width = (xt->sgl[0].size + xt->sgl[0].icg) /
- SIRFSOC_DMA_WORD_LEN;
- sdesc->ylen = xt->numf - 1;
- if (xt->dir == DMA_MEM_TO_DEV) {
- sdesc->addr = xt->src_start;
- sdesc->dir = 1;
- } else {
- sdesc->addr = xt->dst_start;
- sdesc->dir = 0;
- }
-
- list_add_tail(&sdesc->node, &schan->prepared);
- } else {
- pr_err("sirfsoc DMA Invalid xfer\n");
- ret = -EINVAL;
- goto err_xfer;
- }
- spin_unlock_irqrestore(&schan->lock, iflags);
-
- return &sdesc->desc;
-err_xfer:
- spin_unlock_irqrestore(&schan->lock, iflags);
-no_desc:
-err_dir:
- return ERR_PTR(ret);
-}
-
-static struct dma_async_tx_descriptor *
-sirfsoc_dma_prep_cyclic(struct dma_chan *chan, dma_addr_t addr,
- size_t buf_len, size_t period_len,
- enum dma_transfer_direction direction, unsigned long flags)
-{
- struct sirfsoc_dma_chan *schan = dma_chan_to_sirfsoc_dma_chan(chan);
- struct sirfsoc_dma_desc *sdesc = NULL;
- unsigned long iflags;
-
- /*
- * we only support cycle transfer with 2 period
- * If the X-length is set to 0, it would be the loop mode.
- * The DMA address keeps increasing until reaching the end of a loop
- * area whose size is defined by (DMA_WIDTH x (Y_LENGTH + 1)). Then
- * the DMA address goes back to the beginning of this area.
- * In loop mode, the DMA data region is divided into two parts, BUFA
- * and BUFB. DMA controller generates interrupts twice in each loop:
- * when the DMA address reaches the end of BUFA or the end of the
- * BUFB
- */
- if (buf_len != 2 * period_len)
- return ERR_PTR(-EINVAL);
-
- /* Get free descriptor */
- spin_lock_irqsave(&schan->lock, iflags);
- if (!list_empty(&schan->free)) {
- sdesc = list_first_entry(&schan->free, struct sirfsoc_dma_desc,
- node);
- list_del(&sdesc->node);
- }
- spin_unlock_irqrestore(&schan->lock, iflags);
-
- if (!sdesc)
- return NULL;
-
- /* Place descriptor in prepared list */
- spin_lock_irqsave(&schan->lock, iflags);
- sdesc->addr = addr;
- sdesc->cyclic = 1;
- sdesc->xlen = 0;
- sdesc->ylen = buf_len / SIRFSOC_DMA_WORD_LEN - 1;
- sdesc->width = 1;
- list_add_tail(&sdesc->node, &schan->prepared);
- spin_unlock_irqrestore(&schan->lock, iflags);
-
- return &sdesc->desc;
-}
-
-/*
- * The DMA controller consists of 16 independent DMA channels.
- * Each channel is allocated to a different function
- */
-bool sirfsoc_dma_filter_id(struct dma_chan *chan, void *chan_id)
-{
- unsigned int ch_nr = (unsigned int) chan_id;
-
- if (ch_nr == chan->chan_id +
- chan->device->dev_id * SIRFSOC_DMA_CHANNELS)
- return true;
-
- return false;
-}
-EXPORT_SYMBOL(sirfsoc_dma_filter_id);
-
-#define SIRFSOC_DMA_BUSWIDTHS \
- (BIT(DMA_SLAVE_BUSWIDTH_UNDEFINED) | \
- BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) | \
- BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) | \
- BIT(DMA_SLAVE_BUSWIDTH_4_BYTES) | \
- BIT(DMA_SLAVE_BUSWIDTH_8_BYTES))
-
-static struct dma_chan *of_dma_sirfsoc_xlate(struct of_phandle_args *dma_spec,
- struct of_dma *ofdma)
-{
- struct sirfsoc_dma *sdma = ofdma->of_dma_data;
- unsigned int request = dma_spec->args[0];
-
- if (request >= SIRFSOC_DMA_CHANNELS)
- return NULL;
-
- return dma_get_slave_channel(&sdma->channels[request].chan);
-}
-
-static int sirfsoc_dma_probe(struct platform_device *op)
-{
- struct device_node *dn = op->dev.of_node;
- struct device *dev = &op->dev;
- struct dma_device *dma;
- struct sirfsoc_dma *sdma;
- struct sirfsoc_dma_chan *schan;
- struct sirfsoc_dmadata *data;
- struct resource res;
- ulong regs_start, regs_size;
- u32 id;
- int ret, i;
-
- sdma = devm_kzalloc(dev, sizeof(*sdma), GFP_KERNEL);
- if (!sdma)
- return -ENOMEM;
-
- data = (struct sirfsoc_dmadata *)
- (of_match_device(op->dev.driver->of_match_table,
- &op->dev)->data);
- sdma->exec_desc = data->exec;
- sdma->type = data->type;
-
- if (of_property_read_u32(dn, "cell-index", &id)) {
- dev_err(dev, "Fail to get DMAC index\n");
- return -ENODEV;
- }
-
- sdma->irq = irq_of_parse_and_map(dn, 0);
- if (!sdma->irq) {
- dev_err(dev, "Error mapping IRQ!\n");
- return -EINVAL;
- }
-
- sdma->clk = devm_clk_get(dev, NULL);
- if (IS_ERR(sdma->clk)) {
- dev_err(dev, "failed to get a clock.\n");
- return PTR_ERR(sdma->clk);
- }
-
- ret = of_address_to_resource(dn, 0, &res);
- if (ret) {
- dev_err(dev, "Error parsing memory region!\n");
- goto irq_dispose;
- }
-
- regs_start = res.start;
- regs_size = resource_size(&res);
-
- sdma->base = devm_ioremap(dev, regs_start, regs_size);
- if (!sdma->base) {
- dev_err(dev, "Error mapping memory region!\n");
- ret = -ENOMEM;
- goto irq_dispose;
- }
-
- ret = request_irq(sdma->irq, &sirfsoc_dma_irq, 0, DRV_NAME, sdma);
- if (ret) {
- dev_err(dev, "Error requesting IRQ!\n");
- ret = -EINVAL;
- goto irq_dispose;
- }
-
- dma = &sdma->dma;
- dma->dev = dev;
-
- dma->device_alloc_chan_resources = sirfsoc_dma_alloc_chan_resources;
- dma->device_free_chan_resources = sirfsoc_dma_free_chan_resources;
- dma->device_issue_pending = sirfsoc_dma_issue_pending;
- dma->device_config = sirfsoc_dma_slave_config;
- dma->device_pause = sirfsoc_dma_pause_chan;
- dma->device_resume = sirfsoc_dma_resume_chan;
- dma->device_terminate_all = sirfsoc_dma_terminate_all;
- dma->device_tx_status = sirfsoc_dma_tx_status;
- dma->device_prep_interleaved_dma = sirfsoc_dma_prep_interleaved;
- dma->device_prep_dma_cyclic = sirfsoc_dma_prep_cyclic;
- dma->src_addr_widths = SIRFSOC_DMA_BUSWIDTHS;
- dma->dst_addr_widths = SIRFSOC_DMA_BUSWIDTHS;
- dma->directions = BIT(DMA_DEV_TO_MEM) | BIT(DMA_MEM_TO_DEV);
-
- INIT_LIST_HEAD(&dma->channels);
- dma_cap_set(DMA_SLAVE, dma->cap_mask);
- dma_cap_set(DMA_CYCLIC, dma->cap_mask);
- dma_cap_set(DMA_INTERLEAVE, dma->cap_mask);
- dma_cap_set(DMA_PRIVATE, dma->cap_mask);
-
- for (i = 0; i < SIRFSOC_DMA_CHANNELS; i++) {
- schan = &sdma->channels[i];
-
- schan->chan.device = dma;
- dma_cookie_init(&schan->chan);
-
- INIT_LIST_HEAD(&schan->free);
- INIT_LIST_HEAD(&schan->prepared);
- INIT_LIST_HEAD(&schan->queued);
- INIT_LIST_HEAD(&schan->active);
- INIT_LIST_HEAD(&schan->completed);
-
- spin_lock_init(&schan->lock);
- list_add_tail(&schan->chan.device_node, &dma->channels);
- }
-
- tasklet_setup(&sdma->tasklet, sirfsoc_dma_tasklet);
-
- /* Register DMA engine */
- dev_set_drvdata(dev, sdma);
-
- ret = dma_async_device_register(dma);
- if (ret)
- goto free_irq;
-
- /* Device-tree DMA controller registration */
- ret = of_dma_controller_register(dn, of_dma_sirfsoc_xlate, sdma);
- if (ret) {
- dev_err(dev, "failed to register DMA controller\n");
- goto unreg_dma_dev;
- }
-
- pm_runtime_enable(&op->dev);
- dev_info(dev, "initialized SIRFSOC DMAC driver\n");
-
- return 0;
-
-unreg_dma_dev:
- dma_async_device_unregister(dma);
-free_irq:
- free_irq(sdma->irq, sdma);
-irq_dispose:
- irq_dispose_mapping(sdma->irq);
- return ret;
-}
-
-static int sirfsoc_dma_remove(struct platform_device *op)
-{
- struct device *dev = &op->dev;
- struct sirfsoc_dma *sdma = dev_get_drvdata(dev);
-
- of_dma_controller_free(op->dev.of_node);
- dma_async_device_unregister(&sdma->dma);
- free_irq(sdma->irq, sdma);
- tasklet_kill(&sdma->tasklet);
- irq_dispose_mapping(sdma->irq);
- pm_runtime_disable(&op->dev);
- if (!pm_runtime_status_suspended(&op->dev))
- sirfsoc_dma_runtime_suspend(&op->dev);
-
- return 0;
-}
-
-static int __maybe_unused sirfsoc_dma_runtime_suspend(struct device *dev)
-{
- struct sirfsoc_dma *sdma = dev_get_drvdata(dev);
-
- clk_disable_unprepare(sdma->clk);
- return 0;
-}
-
-static int __maybe_unused sirfsoc_dma_runtime_resume(struct device *dev)
-{
- struct sirfsoc_dma *sdma = dev_get_drvdata(dev);
- int ret;
-
- ret = clk_prepare_enable(sdma->clk);
- if (ret < 0) {
- dev_err(dev, "clk_enable failed: %d\n", ret);
- return ret;
- }
- return 0;
-}
-
-static int __maybe_unused sirfsoc_dma_pm_suspend(struct device *dev)
-{
- struct sirfsoc_dma *sdma = dev_get_drvdata(dev);
- struct sirfsoc_dma_regs *save = &sdma->regs_save;
- struct sirfsoc_dma_chan *schan;
- int ch;
- int ret;
- int count;
- u32 int_offset;
-
- /*
- * if we were runtime-suspended before, resume to enable clock
- * before accessing register
- */
- if (pm_runtime_status_suspended(dev)) {
- ret = sirfsoc_dma_runtime_resume(dev);
- if (ret < 0)
- return ret;
- }
-
- if (sdma->type == SIRFSOC_DMA_VER_A7V2) {
- count = 1;
- int_offset = SIRFSOC_DMA_INT_EN_ATLAS7;
- } else {
- count = SIRFSOC_DMA_CHANNELS;
- int_offset = SIRFSOC_DMA_INT_EN;
- }
-
- /*
- * DMA controller will lose all registers while suspending
- * so we need to save registers for active channels
- */
- for (ch = 0; ch < count; ch++) {
- schan = &sdma->channels[ch];
- if (list_empty(&schan->active))
- continue;
- save->ctrl[ch] = readl_relaxed(sdma->base +
- ch * 0x10 + SIRFSOC_DMA_CH_CTRL);
- }
- save->interrupt_en = readl_relaxed(sdma->base + int_offset);
-
- /* Disable clock */
- sirfsoc_dma_runtime_suspend(dev);
-
- return 0;
-}
-
-static int __maybe_unused sirfsoc_dma_pm_resume(struct device *dev)
-{
- struct sirfsoc_dma *sdma = dev_get_drvdata(dev);
- struct sirfsoc_dma_regs *save = &sdma->regs_save;
- struct sirfsoc_dma_desc *sdesc;
- struct sirfsoc_dma_chan *schan;
- int ch;
- int ret;
- int count;
- u32 int_offset;
- u32 width_offset;
-
- /* Enable clock before accessing register */
- ret = sirfsoc_dma_runtime_resume(dev);
- if (ret < 0)
- return ret;
-
- if (sdma->type == SIRFSOC_DMA_VER_A7V2) {
- count = 1;
- int_offset = SIRFSOC_DMA_INT_EN_ATLAS7;
- width_offset = SIRFSOC_DMA_WIDTH_ATLAS7;
- } else {
- count = SIRFSOC_DMA_CHANNELS;
- int_offset = SIRFSOC_DMA_INT_EN;
- width_offset = SIRFSOC_DMA_WIDTH_0;
- }
-
- writel_relaxed(save->interrupt_en, sdma->base + int_offset);
- for (ch = 0; ch < count; ch++) {
- schan = &sdma->channels[ch];
- if (list_empty(&schan->active))
- continue;
- sdesc = list_first_entry(&schan->active,
- struct sirfsoc_dma_desc,
- node);
- writel_relaxed(sdesc->width,
- sdma->base + width_offset + ch * 4);
- writel_relaxed(sdesc->xlen,
- sdma->base + ch * 0x10 + SIRFSOC_DMA_CH_XLEN);
- writel_relaxed(sdesc->ylen,
- sdma->base + ch * 0x10 + SIRFSOC_DMA_CH_YLEN);
- writel_relaxed(save->ctrl[ch],
- sdma->base + ch * 0x10 + SIRFSOC_DMA_CH_CTRL);
- if (sdma->type == SIRFSOC_DMA_VER_A7V2) {
- writel_relaxed(sdesc->addr,
- sdma->base + SIRFSOC_DMA_CH_ADDR);
- } else {
- writel_relaxed(sdesc->addr >> 2,
- sdma->base + ch * 0x10 + SIRFSOC_DMA_CH_ADDR);
-
- }
- }
-
- /* if we were runtime-suspended before, suspend again */
- if (pm_runtime_status_suspended(dev))
- sirfsoc_dma_runtime_suspend(dev);
-
- return 0;
-}
-
-static const struct dev_pm_ops sirfsoc_dma_pm_ops = {
- SET_RUNTIME_PM_OPS(sirfsoc_dma_runtime_suspend, sirfsoc_dma_runtime_resume, NULL)
- SET_SYSTEM_SLEEP_PM_OPS(sirfsoc_dma_pm_suspend, sirfsoc_dma_pm_resume)
-};
-
-static struct sirfsoc_dmadata sirfsoc_dmadata_a6 = {
- .exec = sirfsoc_dma_execute_hw_a6,
- .type = SIRFSOC_DMA_VER_A6,
-};
-
-static struct sirfsoc_dmadata sirfsoc_dmadata_a7v1 = {
- .exec = sirfsoc_dma_execute_hw_a7v1,
- .type = SIRFSOC_DMA_VER_A7V1,
-};
-
-static struct sirfsoc_dmadata sirfsoc_dmadata_a7v2 = {
- .exec = sirfsoc_dma_execute_hw_a7v2,
- .type = SIRFSOC_DMA_VER_A7V2,
-};
-
-static const struct of_device_id sirfsoc_dma_match[] = {
- { .compatible = "sirf,prima2-dmac", .data = &sirfsoc_dmadata_a6,},
- { .compatible = "sirf,atlas7-dmac", .data = &sirfsoc_dmadata_a7v1,},
- { .compatible = "sirf,atlas7-dmac-v2", .data = &sirfsoc_dmadata_a7v2,},
- {},
-};
-MODULE_DEVICE_TABLE(of, sirfsoc_dma_match);
-
-static struct platform_driver sirfsoc_dma_driver = {
- .probe = sirfsoc_dma_probe,
- .remove = sirfsoc_dma_remove,
- .driver = {
- .name = DRV_NAME,
- .pm = &sirfsoc_dma_pm_ops,
- .of_match_table = sirfsoc_dma_match,
- },
-};
-
-static __init int sirfsoc_dma_init(void)
-{
- return platform_driver_register(&sirfsoc_dma_driver);
-}
-
-static void __exit sirfsoc_dma_exit(void)
-{
- platform_driver_unregister(&sirfsoc_dma_driver);
-}
-
-subsys_initcall(sirfsoc_dma_init);
-module_exit(sirfsoc_dma_exit);
-
-MODULE_AUTHOR("Rongjun Ying <rongjun.ying@....com>");
-MODULE_AUTHOR("Barry Song <baohua.song@....com>");
-MODULE_DESCRIPTION("SIRFSOC DMA control driver");
-MODULE_LICENSE("GPL v2");
diff --git a/include/linux/sirfsoc_dma.h b/include/linux/sirfsoc_dma.h
deleted file mode 100644
index 50161b6afb61..000000000000
--- a/include/linux/sirfsoc_dma.h
+++ /dev/null
@@ -1,7 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _SIRFSOC_DMA_H_
-#define _SIRFSOC_DMA_H_
-
-bool sirfsoc_dma_filter_id(struct dma_chan *chan, void *chan_id);
-
-#endif
--
2.29.2
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