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path: root/drivers/mmc/host/renesas_sdhi_sys_dmac.c
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Diffstat (limited to 'drivers/mmc/host/renesas_sdhi_sys_dmac.c')
-rw-r--r--drivers/mmc/host/renesas_sdhi_sys_dmac.c149
1 files changed, 74 insertions, 75 deletions
diff --git a/drivers/mmc/host/renesas_sdhi_sys_dmac.c b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
index 642a0dcc8c5c..543ad1d0ed1c 100644
--- a/drivers/mmc/host/renesas_sdhi_sys_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_sys_dmac.c
@@ -1,25 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
/*
- * DMA function for TMIO MMC implementations
+ * DMA support use of SYS DMAC with SDHI SD/SDIO controller
*
- * Copyright (C) 2016-17 Renesas Electronics Corporation
- * Copyright (C) 2016-17 Sang Engineering, Wolfram Sang
+ * Copyright (C) 2016-19 Renesas Electronics Corporation
+ * Copyright (C) 2016-19 Sang Engineering, Wolfram Sang
* Copyright (C) 2017 Horms Solutions, Simon Horman
* Copyright (C) 2010-2011 Guennadi Liakhovetski
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
-#include <linux/mfd/tmio.h>
#include <linux/mmc/host.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/pagemap.h>
+#include <linux/platform_data/tmio.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/scatterlist.h>
+#include <linux/sys_soc.h>
#include "renesas_sdhi.h"
#include "tmio_mmc.h"
@@ -31,15 +32,18 @@ static const struct renesas_sdhi_of_data of_default_cfg = {
};
static const struct renesas_sdhi_of_data of_rz_compatible = {
- .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_32BIT_DATA_PORT,
+ .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_32BIT_DATA_PORT |
+ TMIO_MMC_HAVE_CBSY,
.tmio_ocr_mask = MMC_VDD_32_33,
- .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+ .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
+ MMC_CAP_WAIT_WHILE_BUSY,
};
static const struct renesas_sdhi_of_data of_rcar_gen1_compatible = {
- .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
- TMIO_MMC_CLK_ACTUAL,
- .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
+ .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL,
+ .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
+ MMC_CAP_WAIT_WHILE_BUSY,
+ .capabilities2 = MMC_CAP2_NO_WRITE_PROTECT,
};
/* Definitions for sampling clocks */
@@ -55,51 +59,37 @@ static struct renesas_sdhi_scc rcar_gen2_scc_taps[] = {
};
static const struct renesas_sdhi_of_data of_rcar_gen2_compatible = {
- .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
- TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
+ .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL |
+ TMIO_MMC_HAVE_CBSY | TMIO_MMC_MIN_RCAR2 |
+ TMIO_MMC_32BIT_DATA_PORT,
.capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
- MMC_CAP_CMD23,
+ MMC_CAP_CMD23 | MMC_CAP_WAIT_WHILE_BUSY,
+ .capabilities2 = MMC_CAP2_NO_WRITE_PROTECT,
.dma_buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES,
.dma_rx_offset = 0x2000,
.scc_offset = 0x0300,
.taps = rcar_gen2_scc_taps,
.taps_num = ARRAY_SIZE(rcar_gen2_scc_taps),
-};
-
-/* Definitions for sampling clocks */
-static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = {
- {
- .clk_rate = 0,
- .tap = 0x00000300,
- },
-};
-
-static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = {
- .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
- TMIO_MMC_CLK_ACTUAL | TMIO_MMC_MIN_RCAR2,
- .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
- MMC_CAP_CMD23,
- .bus_shift = 2,
- .scc_offset = 0x1000,
- .taps = rcar_gen3_scc_taps,
- .taps_num = ARRAY_SIZE(rcar_gen3_scc_taps),
+ .max_blk_count = UINT_MAX / TMIO_MAX_BLK_SIZE,
};
static const struct of_device_id renesas_sdhi_sys_dmac_of_match[] = {
- { .compatible = "renesas,sdhi-shmobile" },
{ .compatible = "renesas,sdhi-sh73a0", .data = &of_default_cfg, },
{ .compatible = "renesas,sdhi-r8a73a4", .data = &of_default_cfg, },
{ .compatible = "renesas,sdhi-r8a7740", .data = &of_default_cfg, },
{ .compatible = "renesas,sdhi-r7s72100", .data = &of_rz_compatible, },
{ .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, },
{ .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, },
+ { .compatible = "renesas,sdhi-r8a7743", .data = &of_rcar_gen2_compatible, },
+ { .compatible = "renesas,sdhi-r8a7745", .data = &of_rcar_gen2_compatible, },
{ .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, },
{ .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, },
{ .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
{ .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
{ .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
- { .compatible = "renesas,sdhi-r8a7795", .data = &of_rcar_gen3_compatible, },
- { .compatible = "renesas,sdhi-r8a7796", .data = &of_rcar_gen3_compatible, },
+ { .compatible = "renesas,rcar-gen1-sdhi", .data = &of_rcar_gen1_compatible, },
+ { .compatible = "renesas,rcar-gen2-sdhi", .data = &of_rcar_gen2_compatible, },
+ { .compatible = "renesas,sdhi-shmobile" },
{},
};
MODULE_DEVICE_TABLE(of, renesas_sdhi_sys_dmac_of_match);
@@ -107,11 +97,13 @@ MODULE_DEVICE_TABLE(of, renesas_sdhi_sys_dmac_of_match);
static void renesas_sdhi_sys_dmac_enable_dma(struct tmio_mmc_host *host,
bool enable)
{
+ struct renesas_sdhi *priv = host_to_priv(host);
+
if (!host->chan_tx || !host->chan_rx)
return;
- if (host->dma->enable)
- host->dma->enable(host, enable);
+ if (priv->dma_priv.enable)
+ priv->dma_priv.enable(host, enable);
}
static void renesas_sdhi_sys_dmac_abort_dma(struct tmio_mmc_host *host)
@@ -119,16 +111,24 @@ static void renesas_sdhi_sys_dmac_abort_dma(struct tmio_mmc_host *host)
renesas_sdhi_sys_dmac_enable_dma(host, false);
if (host->chan_rx)
- dmaengine_terminate_all(host->chan_rx);
+ dmaengine_terminate_sync(host->chan_rx);
if (host->chan_tx)
- dmaengine_terminate_all(host->chan_tx);
+ dmaengine_terminate_sync(host->chan_tx);
renesas_sdhi_sys_dmac_enable_dma(host, true);
}
+static void renesas_sdhi_sys_dmac_dataend_dma(struct tmio_mmc_host *host)
+{
+ struct renesas_sdhi *priv = host_to_priv(host);
+
+ complete(&priv->dma_priv.dma_dataend);
+}
+
static void renesas_sdhi_sys_dmac_dma_callback(void *arg)
{
struct tmio_mmc_host *host = arg;
+ struct renesas_sdhi *priv = host_to_priv(host);
spin_lock_irq(&host->lock);
@@ -146,7 +146,7 @@ static void renesas_sdhi_sys_dmac_dma_callback(void *arg)
spin_unlock_irq(&host->lock);
- wait_for_completion(&host->dma_dataend);
+ wait_for_completion(&priv->dma_priv.dma_dataend);
spin_lock_irq(&host->lock);
tmio_mmc_do_data_irq(host);
@@ -156,13 +156,14 @@ out:
static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host)
{
+ struct renesas_sdhi *priv = host_to_priv(host);
struct scatterlist *sg = host->sg_ptr, *sg_tmp;
struct dma_async_tx_descriptor *desc = NULL;
struct dma_chan *chan = host->chan_rx;
dma_cookie_t cookie;
int ret, i;
bool aligned = true, multiple = true;
- unsigned int align = (1 << host->pdata->alignment_shift) - 1;
+ unsigned int align = 1; /* 2-byte alignment */
for_each_sg(sg, sg_tmp, host->sg_len, i) {
if (sg_tmp->offset & align)
@@ -179,12 +180,8 @@ static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host)
goto pio;
}
- if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
- host->force_pio = true;
+ if (sg->length < TMIO_MMC_MIN_DMA_LEN)
return;
- }
-
- tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_RXRDY);
/* The only sg element can be unaligned, use our bounce buffer then */
if (!aligned) {
@@ -199,7 +196,7 @@ static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host)
DMA_CTRL_ACK);
if (desc) {
- reinit_completion(&host->dma_dataend);
+ reinit_completion(&priv->dma_priv.dma_dataend);
desc->callback = renesas_sdhi_sys_dmac_dma_callback;
desc->callback_param = host;
@@ -208,6 +205,7 @@ static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host)
desc = NULL;
ret = cookie;
}
+ host->dma_on = true;
}
pio:
if (!desc) {
@@ -230,13 +228,14 @@ pio:
static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host)
{
+ struct renesas_sdhi *priv = host_to_priv(host);
struct scatterlist *sg = host->sg_ptr, *sg_tmp;
struct dma_async_tx_descriptor *desc = NULL;
struct dma_chan *chan = host->chan_tx;
dma_cookie_t cookie;
int ret, i;
bool aligned = true, multiple = true;
- unsigned int align = (1 << host->pdata->alignment_shift) - 1;
+ unsigned int align = 1; /* 2-byte alignment */
for_each_sg(sg, sg_tmp, host->sg_len, i) {
if (sg_tmp->offset & align)
@@ -253,21 +252,16 @@ static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host)
goto pio;
}
- if (sg->length < TMIO_MMC_MIN_DMA_LEN) {
- host->force_pio = true;
+ if (sg->length < TMIO_MMC_MIN_DMA_LEN)
return;
- }
-
- tmio_mmc_disable_mmc_irqs(host, TMIO_STAT_TXRQ);
/* The only sg element can be unaligned, use our bounce buffer then */
if (!aligned) {
- unsigned long flags;
- void *sg_vaddr = tmio_mmc_kmap_atomic(sg, &flags);
+ void *sg_vaddr = kmap_local_page(sg_page(sg));
sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length);
- memcpy(host->bounce_buf, sg_vaddr, host->bounce_sg.length);
- tmio_mmc_kunmap_atomic(sg, &flags, sg_vaddr);
+ memcpy(host->bounce_buf, sg_vaddr + sg->offset, host->bounce_sg.length);
+ kunmap_local(sg_vaddr);
host->sg_ptr = &host->bounce_sg;
sg = host->sg_ptr;
}
@@ -278,7 +272,7 @@ static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host)
DMA_CTRL_ACK);
if (desc) {
- reinit_completion(&host->dma_dataend);
+ reinit_completion(&priv->dma_priv.dma_dataend);
desc->callback = renesas_sdhi_sys_dmac_dma_callback;
desc->callback_param = host;
@@ -287,6 +281,7 @@ static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host)
desc = NULL;
ret = cookie;
}
+ host->dma_on = true;
}
pio:
if (!desc) {
@@ -319,14 +314,14 @@ static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host,
}
}
-static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv)
+static void renesas_sdhi_sys_dmac_issue_work_fn(struct work_struct *work)
{
- struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv;
+ struct tmio_mmc_host *host = from_work(host, work, dma_issue);
struct dma_chan *chan = NULL;
spin_lock_irq(&host->lock);
- if (host && host->data) {
+ if (host->data) {
if (host->data->flags & MMC_DATA_READ)
chan = host->chan_rx;
else
@@ -344,9 +339,11 @@ static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv)
static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
struct tmio_mmc_data *pdata)
{
+ struct renesas_sdhi *priv = host_to_priv(host);
+
/* We can only either use DMA for both Tx and Rx or not use it at all */
- if (!host->dma || (!host->pdev->dev.of_node &&
- (!pdata->chan_priv_tx || !pdata->chan_priv_rx)))
+ if (!host->pdev->dev.of_node &&
+ (!pdata->chan_priv_tx || !pdata->chan_priv_rx))
return;
if (!host->chan_tx && !host->chan_rx) {
@@ -363,7 +360,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
dma_cap_set(DMA_SLAVE, mask);
host->chan_tx = dma_request_slave_channel_compat(mask,
- host->dma->filter, pdata->chan_priv_tx,
+ priv->dma_priv.filter, pdata->chan_priv_tx,
&host->pdev->dev, "tx");
dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__,
host->chan_tx);
@@ -374,7 +371,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
cfg.direction = DMA_MEM_TO_DEV;
cfg.dst_addr = res->start +
(CTL_SD_DATA_PORT << host->bus_shift);
- cfg.dst_addr_width = host->dma->dma_buswidth;
+ cfg.dst_addr_width = priv->dma_priv.dma_buswidth;
if (!cfg.dst_addr_width)
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
cfg.src_addr = 0;
@@ -383,7 +380,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
goto ecfgtx;
host->chan_rx = dma_request_slave_channel_compat(mask,
- host->dma->filter, pdata->chan_priv_rx,
+ priv->dma_priv.filter, pdata->chan_priv_rx,
&host->pdev->dev, "rx");
dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__,
host->chan_rx);
@@ -393,7 +390,7 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
cfg.direction = DMA_DEV_TO_MEM;
cfg.src_addr = cfg.dst_addr + host->pdata->dma_rx_offset;
- cfg.src_addr_width = host->dma->dma_buswidth;
+ cfg.src_addr_width = priv->dma_priv.dma_buswidth;
if (!cfg.src_addr_width)
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
cfg.dst_addr = 0;
@@ -405,10 +402,9 @@ static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host,
if (!host->bounce_buf)
goto ebouncebuf;
- init_completion(&host->dma_dataend);
- tasklet_init(&host->dma_issue,
- renesas_sdhi_sys_dmac_issue_tasklet_fn,
- (unsigned long)host);
+ init_completion(&priv->dma_priv.dma_dataend);
+ INIT_WORK(&host->dma_issue,
+ renesas_sdhi_sys_dmac_issue_work_fn);
}
renesas_sdhi_sys_dmac_enable_dma(host, true);
@@ -451,11 +447,13 @@ static const struct tmio_mmc_dma_ops renesas_sdhi_sys_dmac_dma_ops = {
.request = renesas_sdhi_sys_dmac_request_dma,
.release = renesas_sdhi_sys_dmac_release_dma,
.abort = renesas_sdhi_sys_dmac_abort_dma,
+ .dataend = renesas_sdhi_sys_dmac_dataend_dma,
};
static int renesas_sdhi_sys_dmac_probe(struct platform_device *pdev)
{
- return renesas_sdhi_probe(pdev, &renesas_sdhi_sys_dmac_dma_ops);
+ return renesas_sdhi_probe(pdev, &renesas_sdhi_sys_dmac_dma_ops,
+ of_device_get_match_data(&pdev->dev), NULL);
}
static const struct dev_pm_ops renesas_sdhi_sys_dmac_dev_pm_ops = {
@@ -469,6 +467,7 @@ static const struct dev_pm_ops renesas_sdhi_sys_dmac_dev_pm_ops = {
static struct platform_driver renesas_sys_dmac_sdhi_driver = {
.driver = {
.name = "sh_mobile_sdhi",
+ .probe_type = PROBE_PREFER_ASYNCHRONOUS,
.pm = &renesas_sdhi_sys_dmac_dev_pm_ops,
.of_match_table = renesas_sdhi_sys_dmac_of_match,
},
generated by cgit (git 2.34.1) at 2025-12-27 17:29:18 +0000