1f707079dSWolfram Sang // SPDX-License-Identifier: GPL-2.0 2c2a96987SSimon Horman /* 32a68ea78SSimon Horman * DMA support use of SYS DMAC with SDHI SD/SDIO controller 4c2a96987SSimon Horman * 5f49bdcdeSWolfram Sang * Copyright (C) 2016-19 Renesas Electronics Corporation 6f49bdcdeSWolfram Sang * Copyright (C) 2016-19 Sang Engineering, Wolfram Sang 787317c4dSSimon Horman * Copyright (C) 2017 Horms Solutions, Simon Horman 8c2a96987SSimon Horman * Copyright (C) 2010-2011 Guennadi Liakhovetski 9c2a96987SSimon Horman */ 10c2a96987SSimon Horman 11c2a96987SSimon Horman #include <linux/device.h> 12c2a96987SSimon Horman #include <linux/dma-mapping.h> 13c2a96987SSimon Horman #include <linux/dmaengine.h> 14c2a96987SSimon Horman #include <linux/mfd/tmio.h> 15c2a96987SSimon Horman #include <linux/mmc/host.h> 169d08428aSSimon Horman #include <linux/mod_devicetable.h> 179d08428aSSimon Horman #include <linux/module.h> 18cd09780fSSimon Horman #include <linux/of_device.h> 19c2a96987SSimon Horman #include <linux/pagemap.h> 20c2a96987SSimon Horman #include <linux/scatterlist.h> 21cd09780fSSimon Horman #include <linux/sys_soc.h> 22c2a96987SSimon Horman 239d08428aSSimon Horman #include "renesas_sdhi.h" 24c2a96987SSimon Horman #include "tmio_mmc.h" 25c2a96987SSimon Horman 26c2a96987SSimon Horman #define TMIO_MMC_MIN_DMA_LEN 8 27c2a96987SSimon Horman 289d08428aSSimon Horman static const struct renesas_sdhi_of_data of_default_cfg = { 299d08428aSSimon Horman .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT, 309d08428aSSimon Horman }; 319d08428aSSimon Horman 329d08428aSSimon Horman static const struct renesas_sdhi_of_data of_rz_compatible = { 3392b7db8eSWolfram Sang .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_32BIT_DATA_PORT | 3492b7db8eSWolfram Sang TMIO_MMC_HAVE_CBSY, 359d08428aSSimon Horman .tmio_ocr_mask = MMC_VDD_32_33, 36*87e985aeSWolfram Sang .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ | 37*87e985aeSWolfram Sang MMC_CAP_WAIT_WHILE_BUSY, 389d08428aSSimon Horman }; 399d08428aSSimon Horman 409d08428aSSimon Horman static const struct renesas_sdhi_of_data of_rcar_gen1_compatible = { 412ad1db05SMasahiro Yamada .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL, 42*87e985aeSWolfram Sang .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ | 43*87e985aeSWolfram Sang MMC_CAP_WAIT_WHILE_BUSY, 44ef5332c1SWolfram Sang .capabilities2 = MMC_CAP2_NO_WRITE_PROTECT, 459d08428aSSimon Horman }; 469d08428aSSimon Horman 479d08428aSSimon Horman /* Definitions for sampling clocks */ 489d08428aSSimon Horman static struct renesas_sdhi_scc rcar_gen2_scc_taps[] = { 499d08428aSSimon Horman { 509d08428aSSimon Horman .clk_rate = 156000000, 519d08428aSSimon Horman .tap = 0x00000703, 529d08428aSSimon Horman }, 539d08428aSSimon Horman { 549d08428aSSimon Horman .clk_rate = 0, 559d08428aSSimon Horman .tap = 0x00000300, 569d08428aSSimon Horman }, 579d08428aSSimon Horman }; 589d08428aSSimon Horman 599d08428aSSimon Horman static const struct renesas_sdhi_of_data of_rcar_gen2_compatible = { 602ad1db05SMasahiro Yamada .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL | 612ad1db05SMasahiro Yamada TMIO_MMC_HAVE_CBSY | TMIO_MMC_MIN_RCAR2, 62921579b2SWolfram Sang .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ | 63*87e985aeSWolfram Sang MMC_CAP_CMD23 | MMC_CAP_WAIT_WHILE_BUSY, 64ef5332c1SWolfram Sang .capabilities2 = MMC_CAP2_NO_WRITE_PROTECT, 659d08428aSSimon Horman .dma_buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES, 669d08428aSSimon Horman .dma_rx_offset = 0x2000, 679d08428aSSimon Horman .scc_offset = 0x0300, 689d08428aSSimon Horman .taps = rcar_gen2_scc_taps, 699d08428aSSimon Horman .taps_num = ARRAY_SIZE(rcar_gen2_scc_taps), 702a55c1eaSWolfram Sang .max_blk_count = UINT_MAX / TMIO_MAX_BLK_SIZE, 719d08428aSSimon Horman }; 729d08428aSSimon Horman 739d08428aSSimon Horman static const struct of_device_id renesas_sdhi_sys_dmac_of_match[] = { 749d08428aSSimon Horman { .compatible = "renesas,sdhi-sh73a0", .data = &of_default_cfg, }, 759d08428aSSimon Horman { .compatible = "renesas,sdhi-r8a73a4", .data = &of_default_cfg, }, 769d08428aSSimon Horman { .compatible = "renesas,sdhi-r8a7740", .data = &of_default_cfg, }, 779d08428aSSimon Horman { .compatible = "renesas,sdhi-r7s72100", .data = &of_rz_compatible, }, 789d08428aSSimon Horman { .compatible = "renesas,sdhi-r8a7778", .data = &of_rcar_gen1_compatible, }, 799d08428aSSimon Horman { .compatible = "renesas,sdhi-r8a7779", .data = &of_rcar_gen1_compatible, }, 80c16a854eSBiju Das { .compatible = "renesas,sdhi-r8a7743", .data = &of_rcar_gen2_compatible, }, 81c16a854eSBiju Das { .compatible = "renesas,sdhi-r8a7745", .data = &of_rcar_gen2_compatible, }, 829d08428aSSimon Horman { .compatible = "renesas,sdhi-r8a7790", .data = &of_rcar_gen2_compatible, }, 839d08428aSSimon Horman { .compatible = "renesas,sdhi-r8a7791", .data = &of_rcar_gen2_compatible, }, 849d08428aSSimon Horman { .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, }, 859d08428aSSimon Horman { .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, }, 869d08428aSSimon Horman { .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, }, 87d6dc425aSSimon Horman { .compatible = "renesas,rcar-gen1-sdhi", .data = &of_rcar_gen1_compatible, }, 88d6dc425aSSimon Horman { .compatible = "renesas,rcar-gen2-sdhi", .data = &of_rcar_gen2_compatible, }, 89d6dc425aSSimon Horman { .compatible = "renesas,sdhi-shmobile" }, 909d08428aSSimon Horman {}, 919d08428aSSimon Horman }; 929d08428aSSimon Horman MODULE_DEVICE_TABLE(of, renesas_sdhi_sys_dmac_of_match); 939d08428aSSimon Horman 94c2a96987SSimon Horman static void renesas_sdhi_sys_dmac_enable_dma(struct tmio_mmc_host *host, 95c2a96987SSimon Horman bool enable) 96c2a96987SSimon Horman { 97058db286SMasahiro Yamada struct renesas_sdhi *priv = host_to_priv(host); 98058db286SMasahiro Yamada 99c2a96987SSimon Horman if (!host->chan_tx || !host->chan_rx) 100c2a96987SSimon Horman return; 101c2a96987SSimon Horman 102058db286SMasahiro Yamada if (priv->dma_priv.enable) 103058db286SMasahiro Yamada priv->dma_priv.enable(host, enable); 104c2a96987SSimon Horman } 105c2a96987SSimon Horman 106c2a96987SSimon Horman static void renesas_sdhi_sys_dmac_abort_dma(struct tmio_mmc_host *host) 107c2a96987SSimon Horman { 108c2a96987SSimon Horman renesas_sdhi_sys_dmac_enable_dma(host, false); 109c2a96987SSimon Horman 110c2a96987SSimon Horman if (host->chan_rx) 111c2a96987SSimon Horman dmaengine_terminate_all(host->chan_rx); 112c2a96987SSimon Horman if (host->chan_tx) 113c2a96987SSimon Horman dmaengine_terminate_all(host->chan_tx); 114c2a96987SSimon Horman 115c2a96987SSimon Horman renesas_sdhi_sys_dmac_enable_dma(host, true); 116c2a96987SSimon Horman } 117c2a96987SSimon Horman 11892d0f925SSimon Horman static void renesas_sdhi_sys_dmac_dataend_dma(struct tmio_mmc_host *host) 11992d0f925SSimon Horman { 12090d95106SMasahiro Yamada struct renesas_sdhi *priv = host_to_priv(host); 12190d95106SMasahiro Yamada 12290d95106SMasahiro Yamada complete(&priv->dma_priv.dma_dataend); 12392d0f925SSimon Horman } 12492d0f925SSimon Horman 125c2a96987SSimon Horman static void renesas_sdhi_sys_dmac_dma_callback(void *arg) 126c2a96987SSimon Horman { 127c2a96987SSimon Horman struct tmio_mmc_host *host = arg; 12890d95106SMasahiro Yamada struct renesas_sdhi *priv = host_to_priv(host); 129c2a96987SSimon Horman 130c2a96987SSimon Horman spin_lock_irq(&host->lock); 131c2a96987SSimon Horman 132c2a96987SSimon Horman if (!host->data) 133c2a96987SSimon Horman goto out; 134c2a96987SSimon Horman 135c2a96987SSimon Horman if (host->data->flags & MMC_DATA_READ) 136c2a96987SSimon Horman dma_unmap_sg(host->chan_rx->device->dev, 137c2a96987SSimon Horman host->sg_ptr, host->sg_len, 138c2a96987SSimon Horman DMA_FROM_DEVICE); 139c2a96987SSimon Horman else 140c2a96987SSimon Horman dma_unmap_sg(host->chan_tx->device->dev, 141c2a96987SSimon Horman host->sg_ptr, host->sg_len, 142c2a96987SSimon Horman DMA_TO_DEVICE); 143c2a96987SSimon Horman 144c2a96987SSimon Horman spin_unlock_irq(&host->lock); 145c2a96987SSimon Horman 14690d95106SMasahiro Yamada wait_for_completion(&priv->dma_priv.dma_dataend); 147c2a96987SSimon Horman 148c2a96987SSimon Horman spin_lock_irq(&host->lock); 149c2a96987SSimon Horman tmio_mmc_do_data_irq(host); 150c2a96987SSimon Horman out: 151c2a96987SSimon Horman spin_unlock_irq(&host->lock); 152c2a96987SSimon Horman } 153c2a96987SSimon Horman 154c2a96987SSimon Horman static void renesas_sdhi_sys_dmac_start_dma_rx(struct tmio_mmc_host *host) 155c2a96987SSimon Horman { 15690d95106SMasahiro Yamada struct renesas_sdhi *priv = host_to_priv(host); 157c2a96987SSimon Horman struct scatterlist *sg = host->sg_ptr, *sg_tmp; 158c2a96987SSimon Horman struct dma_async_tx_descriptor *desc = NULL; 159c2a96987SSimon Horman struct dma_chan *chan = host->chan_rx; 160c2a96987SSimon Horman dma_cookie_t cookie; 161c2a96987SSimon Horman int ret, i; 162c2a96987SSimon Horman bool aligned = true, multiple = true; 163c2a96987SSimon Horman unsigned int align = (1 << host->pdata->alignment_shift) - 1; 164c2a96987SSimon Horman 165c2a96987SSimon Horman for_each_sg(sg, sg_tmp, host->sg_len, i) { 166c2a96987SSimon Horman if (sg_tmp->offset & align) 167c2a96987SSimon Horman aligned = false; 168c2a96987SSimon Horman if (sg_tmp->length & align) { 169c2a96987SSimon Horman multiple = false; 170c2a96987SSimon Horman break; 171c2a96987SSimon Horman } 172c2a96987SSimon Horman } 173c2a96987SSimon Horman 174c2a96987SSimon Horman if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_SIZE || 175c2a96987SSimon Horman (align & PAGE_MASK))) || !multiple) { 176c2a96987SSimon Horman ret = -EINVAL; 177c2a96987SSimon Horman goto pio; 178c2a96987SSimon Horman } 179c2a96987SSimon Horman 180d3dd5db0SMasahiro Yamada if (sg->length < TMIO_MMC_MIN_DMA_LEN) 181c2a96987SSimon Horman return; 182c2a96987SSimon Horman 183c2a96987SSimon Horman /* The only sg element can be unaligned, use our bounce buffer then */ 184c2a96987SSimon Horman if (!aligned) { 185c2a96987SSimon Horman sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length); 186c2a96987SSimon Horman host->sg_ptr = &host->bounce_sg; 187c2a96987SSimon Horman sg = host->sg_ptr; 188c2a96987SSimon Horman } 189c2a96987SSimon Horman 190c2a96987SSimon Horman ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_FROM_DEVICE); 191c2a96987SSimon Horman if (ret > 0) 1922fe35968SSimon Horman desc = dmaengine_prep_slave_sg(chan, sg, ret, DMA_DEV_TO_MEM, 1932fe35968SSimon Horman DMA_CTRL_ACK); 194c2a96987SSimon Horman 195c2a96987SSimon Horman if (desc) { 19690d95106SMasahiro Yamada reinit_completion(&priv->dma_priv.dma_dataend); 197c2a96987SSimon Horman desc->callback = renesas_sdhi_sys_dmac_dma_callback; 198c2a96987SSimon Horman desc->callback_param = host; 199c2a96987SSimon Horman 200c2a96987SSimon Horman cookie = dmaengine_submit(desc); 201c2a96987SSimon Horman if (cookie < 0) { 202c2a96987SSimon Horman desc = NULL; 203c2a96987SSimon Horman ret = cookie; 204c2a96987SSimon Horman } 205d3dd5db0SMasahiro Yamada host->dma_on = true; 206c2a96987SSimon Horman } 207c2a96987SSimon Horman pio: 208c2a96987SSimon Horman if (!desc) { 209c2a96987SSimon Horman /* DMA failed, fall back to PIO */ 210c2a96987SSimon Horman renesas_sdhi_sys_dmac_enable_dma(host, false); 211c2a96987SSimon Horman if (ret >= 0) 212c2a96987SSimon Horman ret = -EIO; 213c2a96987SSimon Horman host->chan_rx = NULL; 214c2a96987SSimon Horman dma_release_channel(chan); 215c2a96987SSimon Horman /* Free the Tx channel too */ 216c2a96987SSimon Horman chan = host->chan_tx; 217c2a96987SSimon Horman if (chan) { 218c2a96987SSimon Horman host->chan_tx = NULL; 219c2a96987SSimon Horman dma_release_channel(chan); 220c2a96987SSimon Horman } 221c2a96987SSimon Horman dev_warn(&host->pdev->dev, 222c2a96987SSimon Horman "DMA failed: %d, falling back to PIO\n", ret); 223c2a96987SSimon Horman } 224c2a96987SSimon Horman } 225c2a96987SSimon Horman 226c2a96987SSimon Horman static void renesas_sdhi_sys_dmac_start_dma_tx(struct tmio_mmc_host *host) 227c2a96987SSimon Horman { 22890d95106SMasahiro Yamada struct renesas_sdhi *priv = host_to_priv(host); 229c2a96987SSimon Horman struct scatterlist *sg = host->sg_ptr, *sg_tmp; 230c2a96987SSimon Horman struct dma_async_tx_descriptor *desc = NULL; 231c2a96987SSimon Horman struct dma_chan *chan = host->chan_tx; 232c2a96987SSimon Horman dma_cookie_t cookie; 233c2a96987SSimon Horman int ret, i; 234c2a96987SSimon Horman bool aligned = true, multiple = true; 235c2a96987SSimon Horman unsigned int align = (1 << host->pdata->alignment_shift) - 1; 236c2a96987SSimon Horman 237c2a96987SSimon Horman for_each_sg(sg, sg_tmp, host->sg_len, i) { 238c2a96987SSimon Horman if (sg_tmp->offset & align) 239c2a96987SSimon Horman aligned = false; 240c2a96987SSimon Horman if (sg_tmp->length & align) { 241c2a96987SSimon Horman multiple = false; 242c2a96987SSimon Horman break; 243c2a96987SSimon Horman } 244c2a96987SSimon Horman } 245c2a96987SSimon Horman 246c2a96987SSimon Horman if ((!aligned && (host->sg_len > 1 || sg->length > PAGE_SIZE || 247c2a96987SSimon Horman (align & PAGE_MASK))) || !multiple) { 248c2a96987SSimon Horman ret = -EINVAL; 249c2a96987SSimon Horman goto pio; 250c2a96987SSimon Horman } 251c2a96987SSimon Horman 252d3dd5db0SMasahiro Yamada if (sg->length < TMIO_MMC_MIN_DMA_LEN) 253c2a96987SSimon Horman return; 254c2a96987SSimon Horman 255c2a96987SSimon Horman /* The only sg element can be unaligned, use our bounce buffer then */ 256c2a96987SSimon Horman if (!aligned) { 257c2a96987SSimon Horman unsigned long flags; 258c2a96987SSimon Horman void *sg_vaddr = tmio_mmc_kmap_atomic(sg, &flags); 2592fe35968SSimon Horman 260c2a96987SSimon Horman sg_init_one(&host->bounce_sg, host->bounce_buf, sg->length); 261c2a96987SSimon Horman memcpy(host->bounce_buf, sg_vaddr, host->bounce_sg.length); 262c2a96987SSimon Horman tmio_mmc_kunmap_atomic(sg, &flags, sg_vaddr); 263c2a96987SSimon Horman host->sg_ptr = &host->bounce_sg; 264c2a96987SSimon Horman sg = host->sg_ptr; 265c2a96987SSimon Horman } 266c2a96987SSimon Horman 267c2a96987SSimon Horman ret = dma_map_sg(chan->device->dev, sg, host->sg_len, DMA_TO_DEVICE); 268c2a96987SSimon Horman if (ret > 0) 2692fe35968SSimon Horman desc = dmaengine_prep_slave_sg(chan, sg, ret, DMA_MEM_TO_DEV, 2702fe35968SSimon Horman DMA_CTRL_ACK); 271c2a96987SSimon Horman 272c2a96987SSimon Horman if (desc) { 27390d95106SMasahiro Yamada reinit_completion(&priv->dma_priv.dma_dataend); 274c2a96987SSimon Horman desc->callback = renesas_sdhi_sys_dmac_dma_callback; 275c2a96987SSimon Horman desc->callback_param = host; 276c2a96987SSimon Horman 277c2a96987SSimon Horman cookie = dmaengine_submit(desc); 278c2a96987SSimon Horman if (cookie < 0) { 279c2a96987SSimon Horman desc = NULL; 280c2a96987SSimon Horman ret = cookie; 281c2a96987SSimon Horman } 282d3dd5db0SMasahiro Yamada host->dma_on = true; 283c2a96987SSimon Horman } 284c2a96987SSimon Horman pio: 285c2a96987SSimon Horman if (!desc) { 286c2a96987SSimon Horman /* DMA failed, fall back to PIO */ 287c2a96987SSimon Horman renesas_sdhi_sys_dmac_enable_dma(host, false); 288c2a96987SSimon Horman if (ret >= 0) 289c2a96987SSimon Horman ret = -EIO; 290c2a96987SSimon Horman host->chan_tx = NULL; 291c2a96987SSimon Horman dma_release_channel(chan); 292c2a96987SSimon Horman /* Free the Rx channel too */ 293c2a96987SSimon Horman chan = host->chan_rx; 294c2a96987SSimon Horman if (chan) { 295c2a96987SSimon Horman host->chan_rx = NULL; 296c2a96987SSimon Horman dma_release_channel(chan); 297c2a96987SSimon Horman } 298c2a96987SSimon Horman dev_warn(&host->pdev->dev, 299c2a96987SSimon Horman "DMA failed: %d, falling back to PIO\n", ret); 300c2a96987SSimon Horman } 301c2a96987SSimon Horman } 302c2a96987SSimon Horman 303c2a96987SSimon Horman static void renesas_sdhi_sys_dmac_start_dma(struct tmio_mmc_host *host, 304c2a96987SSimon Horman struct mmc_data *data) 305c2a96987SSimon Horman { 306c2a96987SSimon Horman if (data->flags & MMC_DATA_READ) { 307c2a96987SSimon Horman if (host->chan_rx) 308c2a96987SSimon Horman renesas_sdhi_sys_dmac_start_dma_rx(host); 309c2a96987SSimon Horman } else { 310c2a96987SSimon Horman if (host->chan_tx) 311c2a96987SSimon Horman renesas_sdhi_sys_dmac_start_dma_tx(host); 312c2a96987SSimon Horman } 313c2a96987SSimon Horman } 314c2a96987SSimon Horman 315c2a96987SSimon Horman static void renesas_sdhi_sys_dmac_issue_tasklet_fn(unsigned long priv) 316c2a96987SSimon Horman { 317c2a96987SSimon Horman struct tmio_mmc_host *host = (struct tmio_mmc_host *)priv; 318c2a96987SSimon Horman struct dma_chan *chan = NULL; 319c2a96987SSimon Horman 320c2a96987SSimon Horman spin_lock_irq(&host->lock); 321c2a96987SSimon Horman 322b8155d3fSDan Carpenter if (host->data) { 323c2a96987SSimon Horman if (host->data->flags & MMC_DATA_READ) 324c2a96987SSimon Horman chan = host->chan_rx; 325c2a96987SSimon Horman else 326c2a96987SSimon Horman chan = host->chan_tx; 327c2a96987SSimon Horman } 328c2a96987SSimon Horman 329c2a96987SSimon Horman spin_unlock_irq(&host->lock); 330c2a96987SSimon Horman 331c2a96987SSimon Horman tmio_mmc_enable_mmc_irqs(host, TMIO_STAT_DATAEND); 332c2a96987SSimon Horman 333c2a96987SSimon Horman if (chan) 334c2a96987SSimon Horman dma_async_issue_pending(chan); 335c2a96987SSimon Horman } 336c2a96987SSimon Horman 337c2a96987SSimon Horman static void renesas_sdhi_sys_dmac_request_dma(struct tmio_mmc_host *host, 338c2a96987SSimon Horman struct tmio_mmc_data *pdata) 339c2a96987SSimon Horman { 340058db286SMasahiro Yamada struct renesas_sdhi *priv = host_to_priv(host); 341058db286SMasahiro Yamada 342c2a96987SSimon Horman /* We can only either use DMA for both Tx and Rx or not use it at all */ 3432487e7efSMasahiro Yamada if (!host->pdev->dev.of_node && 3442487e7efSMasahiro Yamada (!pdata->chan_priv_tx || !pdata->chan_priv_rx)) 345c2a96987SSimon Horman return; 346c2a96987SSimon Horman 347c2a96987SSimon Horman if (!host->chan_tx && !host->chan_rx) { 348c2a96987SSimon Horman struct resource *res = platform_get_resource(host->pdev, 349c2a96987SSimon Horman IORESOURCE_MEM, 0); 350c2a96987SSimon Horman struct dma_slave_config cfg = {}; 351c2a96987SSimon Horman dma_cap_mask_t mask; 352c2a96987SSimon Horman int ret; 353c2a96987SSimon Horman 354c2a96987SSimon Horman if (!res) 355c2a96987SSimon Horman return; 356c2a96987SSimon Horman 357c2a96987SSimon Horman dma_cap_zero(mask); 358c2a96987SSimon Horman dma_cap_set(DMA_SLAVE, mask); 359c2a96987SSimon Horman 360c2a96987SSimon Horman host->chan_tx = dma_request_slave_channel_compat(mask, 361058db286SMasahiro Yamada priv->dma_priv.filter, pdata->chan_priv_tx, 362c2a96987SSimon Horman &host->pdev->dev, "tx"); 363c2a96987SSimon Horman dev_dbg(&host->pdev->dev, "%s: TX: got channel %p\n", __func__, 364c2a96987SSimon Horman host->chan_tx); 365c2a96987SSimon Horman 366c2a96987SSimon Horman if (!host->chan_tx) 367c2a96987SSimon Horman return; 368c2a96987SSimon Horman 369c2a96987SSimon Horman cfg.direction = DMA_MEM_TO_DEV; 3702fe35968SSimon Horman cfg.dst_addr = res->start + 3712fe35968SSimon Horman (CTL_SD_DATA_PORT << host->bus_shift); 372058db286SMasahiro Yamada cfg.dst_addr_width = priv->dma_priv.dma_buswidth; 373c2a96987SSimon Horman if (!cfg.dst_addr_width) 374c2a96987SSimon Horman cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; 375c2a96987SSimon Horman cfg.src_addr = 0; 376c2a96987SSimon Horman ret = dmaengine_slave_config(host->chan_tx, &cfg); 377c2a96987SSimon Horman if (ret < 0) 378c2a96987SSimon Horman goto ecfgtx; 379c2a96987SSimon Horman 380c2a96987SSimon Horman host->chan_rx = dma_request_slave_channel_compat(mask, 381058db286SMasahiro Yamada priv->dma_priv.filter, pdata->chan_priv_rx, 382c2a96987SSimon Horman &host->pdev->dev, "rx"); 383c2a96987SSimon Horman dev_dbg(&host->pdev->dev, "%s: RX: got channel %p\n", __func__, 384c2a96987SSimon Horman host->chan_rx); 385c2a96987SSimon Horman 386c2a96987SSimon Horman if (!host->chan_rx) 387c2a96987SSimon Horman goto ereqrx; 388c2a96987SSimon Horman 389c2a96987SSimon Horman cfg.direction = DMA_DEV_TO_MEM; 390c2a96987SSimon Horman cfg.src_addr = cfg.dst_addr + host->pdata->dma_rx_offset; 391058db286SMasahiro Yamada cfg.src_addr_width = priv->dma_priv.dma_buswidth; 392c2a96987SSimon Horman if (!cfg.src_addr_width) 393c2a96987SSimon Horman cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; 394c2a96987SSimon Horman cfg.dst_addr = 0; 395c2a96987SSimon Horman ret = dmaengine_slave_config(host->chan_rx, &cfg); 396c2a96987SSimon Horman if (ret < 0) 397c2a96987SSimon Horman goto ecfgrx; 398c2a96987SSimon Horman 399c2a96987SSimon Horman host->bounce_buf = (u8 *)__get_free_page(GFP_KERNEL | GFP_DMA); 400c2a96987SSimon Horman if (!host->bounce_buf) 401c2a96987SSimon Horman goto ebouncebuf; 402c2a96987SSimon Horman 40390d95106SMasahiro Yamada init_completion(&priv->dma_priv.dma_dataend); 404c2a96987SSimon Horman tasklet_init(&host->dma_issue, 405c2a96987SSimon Horman renesas_sdhi_sys_dmac_issue_tasklet_fn, 406c2a96987SSimon Horman (unsigned long)host); 407c2a96987SSimon Horman } 408c2a96987SSimon Horman 409c2a96987SSimon Horman renesas_sdhi_sys_dmac_enable_dma(host, true); 410c2a96987SSimon Horman 411c2a96987SSimon Horman return; 412c2a96987SSimon Horman 413c2a96987SSimon Horman ebouncebuf: 414c2a96987SSimon Horman ecfgrx: 415c2a96987SSimon Horman dma_release_channel(host->chan_rx); 416c2a96987SSimon Horman host->chan_rx = NULL; 417c2a96987SSimon Horman ereqrx: 418c2a96987SSimon Horman ecfgtx: 419c2a96987SSimon Horman dma_release_channel(host->chan_tx); 420c2a96987SSimon Horman host->chan_tx = NULL; 421c2a96987SSimon Horman } 422c2a96987SSimon Horman 423c2a96987SSimon Horman static void renesas_sdhi_sys_dmac_release_dma(struct tmio_mmc_host *host) 424c2a96987SSimon Horman { 425c2a96987SSimon Horman if (host->chan_tx) { 426c2a96987SSimon Horman struct dma_chan *chan = host->chan_tx; 4272fe35968SSimon Horman 428c2a96987SSimon Horman host->chan_tx = NULL; 429c2a96987SSimon Horman dma_release_channel(chan); 430c2a96987SSimon Horman } 431c2a96987SSimon Horman if (host->chan_rx) { 432c2a96987SSimon Horman struct dma_chan *chan = host->chan_rx; 4332fe35968SSimon Horman 434c2a96987SSimon Horman host->chan_rx = NULL; 435c2a96987SSimon Horman dma_release_channel(chan); 436c2a96987SSimon Horman } 437c2a96987SSimon Horman if (host->bounce_buf) { 438c2a96987SSimon Horman free_pages((unsigned long)host->bounce_buf, 0); 439c2a96987SSimon Horman host->bounce_buf = NULL; 440c2a96987SSimon Horman } 441c2a96987SSimon Horman } 442c2a96987SSimon Horman 443c2a96987SSimon Horman static const struct tmio_mmc_dma_ops renesas_sdhi_sys_dmac_dma_ops = { 444c2a96987SSimon Horman .start = renesas_sdhi_sys_dmac_start_dma, 445c2a96987SSimon Horman .enable = renesas_sdhi_sys_dmac_enable_dma, 446c2a96987SSimon Horman .request = renesas_sdhi_sys_dmac_request_dma, 447c2a96987SSimon Horman .release = renesas_sdhi_sys_dmac_release_dma, 448c2a96987SSimon Horman .abort = renesas_sdhi_sys_dmac_abort_dma, 44992d0f925SSimon Horman .dataend = renesas_sdhi_sys_dmac_dataend_dma, 450c2a96987SSimon Horman }; 451c2a96987SSimon Horman 4529d08428aSSimon Horman static int renesas_sdhi_sys_dmac_probe(struct platform_device *pdev) 453c2a96987SSimon Horman { 4549d08428aSSimon Horman return renesas_sdhi_probe(pdev, &renesas_sdhi_sys_dmac_dma_ops); 455c2a96987SSimon Horman } 4569d08428aSSimon Horman 4579d08428aSSimon Horman static const struct dev_pm_ops renesas_sdhi_sys_dmac_dev_pm_ops = { 4589d08428aSSimon Horman SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 4599d08428aSSimon Horman pm_runtime_force_resume) 4609d08428aSSimon Horman SET_RUNTIME_PM_OPS(tmio_mmc_host_runtime_suspend, 4619d08428aSSimon Horman tmio_mmc_host_runtime_resume, 4629d08428aSSimon Horman NULL) 4639d08428aSSimon Horman }; 4649d08428aSSimon Horman 4659d08428aSSimon Horman static struct platform_driver renesas_sys_dmac_sdhi_driver = { 4669d08428aSSimon Horman .driver = { 4679d08428aSSimon Horman .name = "sh_mobile_sdhi", 4687320915cSDouglas Anderson .probe_type = PROBE_PREFER_ASYNCHRONOUS, 4699d08428aSSimon Horman .pm = &renesas_sdhi_sys_dmac_dev_pm_ops, 4709d08428aSSimon Horman .of_match_table = renesas_sdhi_sys_dmac_of_match, 4719d08428aSSimon Horman }, 4729d08428aSSimon Horman .probe = renesas_sdhi_sys_dmac_probe, 4739d08428aSSimon Horman .remove = renesas_sdhi_remove, 4749d08428aSSimon Horman }; 4759d08428aSSimon Horman 4769d08428aSSimon Horman module_platform_driver(renesas_sys_dmac_sdhi_driver); 4779d08428aSSimon Horman 4789d08428aSSimon Horman MODULE_DESCRIPTION("Renesas SDHI driver"); 4799d08428aSSimon Horman MODULE_AUTHOR("Magnus Damm"); 4809d08428aSSimon Horman MODULE_LICENSE("GPL v2"); 4819d08428aSSimon Horman MODULE_ALIAS("platform:sh_mobile_sdhi"); 482