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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /sound/soc/sh/rcar/dma.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/sh/rcar/dma.c')
-rw-r--r--sound/soc/sh/rcar/dma.c905
1 files changed, 905 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/dma.c b/sound/soc/sh/rcar/dma.c
new file mode 100644
index 000000000..463ab237d
--- /dev/null
+++ b/sound/soc/sh/rcar/dma.c
@@ -0,0 +1,905 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Renesas R-Car Audio DMAC support
+//
+// Copyright (C) 2015 Renesas Electronics Corp.
+// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+
+#include <linux/delay.h>
+#include <linux/of_dma.h>
+#include "rsnd.h"
+
+/*
+ * Audio DMAC peri peri register
+ */
+#define PDMASAR 0x00
+#define PDMADAR 0x04
+#define PDMACHCR 0x0c
+
+/* PDMACHCR */
+#define PDMACHCR_DE (1 << 0)
+
+
+struct rsnd_dmaen {
+ struct dma_chan *chan;
+ dma_cookie_t cookie;
+ unsigned int dma_len;
+};
+
+struct rsnd_dmapp {
+ int dmapp_id;
+ u32 chcr;
+};
+
+struct rsnd_dma {
+ struct rsnd_mod mod;
+ struct rsnd_mod *mod_from;
+ struct rsnd_mod *mod_to;
+ dma_addr_t src_addr;
+ dma_addr_t dst_addr;
+ union {
+ struct rsnd_dmaen en;
+ struct rsnd_dmapp pp;
+ } dma;
+};
+
+struct rsnd_dma_ctrl {
+ void __iomem *ppbase;
+ phys_addr_t ppres;
+ int dmaen_num;
+ int dmapp_num;
+};
+
+#define rsnd_priv_to_dmac(p) ((struct rsnd_dma_ctrl *)(p)->dma)
+#define rsnd_mod_to_dma(_mod) container_of((_mod), struct rsnd_dma, mod)
+#define rsnd_dma_to_dmaen(dma) (&(dma)->dma.en)
+#define rsnd_dma_to_dmapp(dma) (&(dma)->dma.pp)
+
+/* for DEBUG */
+static struct rsnd_mod_ops mem_ops = {
+ .name = "mem",
+};
+
+static struct rsnd_mod mem = {
+};
+
+/*
+ * Audio DMAC
+ */
+static void __rsnd_dmaen_complete(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io)
+{
+ if (rsnd_io_is_working(io))
+ rsnd_dai_period_elapsed(io);
+}
+
+static void rsnd_dmaen_complete(void *data)
+{
+ struct rsnd_mod *mod = data;
+
+ rsnd_mod_interrupt(mod, __rsnd_dmaen_complete);
+}
+
+static struct dma_chan *rsnd_dmaen_request_channel(struct rsnd_dai_stream *io,
+ struct rsnd_mod *mod_from,
+ struct rsnd_mod *mod_to)
+{
+ if ((!mod_from && !mod_to) ||
+ (mod_from && mod_to))
+ return NULL;
+
+ if (mod_from)
+ return rsnd_mod_dma_req(io, mod_from);
+ else
+ return rsnd_mod_dma_req(io, mod_to);
+}
+
+static int rsnd_dmaen_stop(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ struct rsnd_priv *priv)
+{
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+ struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
+
+ if (dmaen->chan)
+ dmaengine_terminate_async(dmaen->chan);
+
+ return 0;
+}
+
+static int rsnd_dmaen_cleanup(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ struct rsnd_priv *priv)
+{
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+ struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
+
+ /*
+ * DMAEngine release uses mutex lock.
+ * Thus, it shouldn't be called under spinlock.
+ * Let's call it under prepare
+ */
+ if (dmaen->chan)
+ dma_release_channel(dmaen->chan);
+
+ dmaen->chan = NULL;
+
+ return 0;
+}
+
+static int rsnd_dmaen_prepare(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ struct rsnd_priv *priv)
+{
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+ struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
+ struct device *dev = rsnd_priv_to_dev(priv);
+
+ /* maybe suspended */
+ if (dmaen->chan)
+ return 0;
+
+ /*
+ * DMAEngine request uses mutex lock.
+ * Thus, it shouldn't be called under spinlock.
+ * Let's call it under prepare
+ */
+ dmaen->chan = rsnd_dmaen_request_channel(io,
+ dma->mod_from,
+ dma->mod_to);
+ if (IS_ERR_OR_NULL(dmaen->chan)) {
+ dmaen->chan = NULL;
+ dev_err(dev, "can't get dma channel\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int rsnd_dmaen_start(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ struct rsnd_priv *priv)
+{
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+ struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
+ struct snd_pcm_substream *substream = io->substream;
+ struct device *dev = rsnd_priv_to_dev(priv);
+ struct dma_async_tx_descriptor *desc;
+ struct dma_slave_config cfg = {};
+ enum dma_slave_buswidth buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ int is_play = rsnd_io_is_play(io);
+ int ret;
+
+ /*
+ * in case of monaural data writing or reading through Audio-DMAC
+ * data is always in Left Justified format, so both src and dst
+ * DMA Bus width need to be set equal to physical data width.
+ */
+ if (rsnd_runtime_channel_original(io) == 1) {
+ struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+ int bits = snd_pcm_format_physical_width(runtime->format);
+
+ switch (bits) {
+ case 8:
+ buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE;
+ break;
+ case 16:
+ buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES;
+ break;
+ case 32:
+ buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ break;
+ default:
+ dev_err(dev, "invalid format width %d\n", bits);
+ return -EINVAL;
+ }
+ }
+
+ cfg.direction = is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM;
+ cfg.src_addr = dma->src_addr;
+ cfg.dst_addr = dma->dst_addr;
+ cfg.src_addr_width = buswidth;
+ cfg.dst_addr_width = buswidth;
+
+ dev_dbg(dev, "%s %pad -> %pad\n",
+ rsnd_mod_name(mod),
+ &cfg.src_addr, &cfg.dst_addr);
+
+ ret = dmaengine_slave_config(dmaen->chan, &cfg);
+ if (ret < 0)
+ return ret;
+
+ desc = dmaengine_prep_dma_cyclic(dmaen->chan,
+ substream->runtime->dma_addr,
+ snd_pcm_lib_buffer_bytes(substream),
+ snd_pcm_lib_period_bytes(substream),
+ is_play ? DMA_MEM_TO_DEV : DMA_DEV_TO_MEM,
+ DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+
+ if (!desc) {
+ dev_err(dev, "dmaengine_prep_slave_sg() fail\n");
+ return -EIO;
+ }
+
+ desc->callback = rsnd_dmaen_complete;
+ desc->callback_param = rsnd_mod_get(dma);
+
+ dmaen->dma_len = snd_pcm_lib_buffer_bytes(substream);
+
+ dmaen->cookie = dmaengine_submit(desc);
+ if (dmaen->cookie < 0) {
+ dev_err(dev, "dmaengine_submit() fail\n");
+ return -EIO;
+ }
+
+ dma_async_issue_pending(dmaen->chan);
+
+ return 0;
+}
+
+struct dma_chan *rsnd_dma_request_channel(struct device_node *of_node, char *name,
+ struct rsnd_mod *mod, char *x)
+{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ struct dma_chan *chan = NULL;
+ struct device_node *np;
+ int i = 0;
+
+ for_each_child_of_node(of_node, np) {
+ i = rsnd_node_fixed_index(dev, np, name, i);
+ if (i < 0) {
+ chan = NULL;
+ of_node_put(np);
+ break;
+ }
+
+ if (i == rsnd_mod_id_raw(mod) && (!chan))
+ chan = of_dma_request_slave_channel(np, x);
+ i++;
+ }
+
+ /* It should call of_node_put(), since, it is rsnd_xxx_of_node() */
+ of_node_put(of_node);
+
+ return chan;
+}
+
+static int rsnd_dmaen_attach(struct rsnd_dai_stream *io,
+ struct rsnd_dma *dma,
+ struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
+{
+ struct rsnd_priv *priv = rsnd_io_to_priv(io);
+ struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
+ struct dma_chan *chan;
+
+ /* try to get DMAEngine channel */
+ chan = rsnd_dmaen_request_channel(io, mod_from, mod_to);
+ if (IS_ERR_OR_NULL(chan)) {
+ /* Let's follow when -EPROBE_DEFER case */
+ if (PTR_ERR(chan) == -EPROBE_DEFER)
+ return PTR_ERR(chan);
+
+ /*
+ * DMA failed. try to PIO mode
+ * see
+ * rsnd_ssi_fallback()
+ * rsnd_rdai_continuance_probe()
+ */
+ return -EAGAIN;
+ }
+
+ /*
+ * use it for IPMMU if needed
+ * see
+ * rsnd_preallocate_pages()
+ */
+ io->dmac_dev = chan->device->dev;
+
+ dma_release_channel(chan);
+
+ dmac->dmaen_num++;
+
+ return 0;
+}
+
+static int rsnd_dmaen_pointer(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ snd_pcm_uframes_t *pointer)
+{
+ struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+ struct rsnd_dmaen *dmaen = rsnd_dma_to_dmaen(dma);
+ struct dma_tx_state state;
+ enum dma_status status;
+ unsigned int pos = 0;
+
+ status = dmaengine_tx_status(dmaen->chan, dmaen->cookie, &state);
+ if (status == DMA_IN_PROGRESS || status == DMA_PAUSED) {
+ if (state.residue > 0 && state.residue <= dmaen->dma_len)
+ pos = dmaen->dma_len - state.residue;
+ }
+ *pointer = bytes_to_frames(runtime, pos);
+
+ return 0;
+}
+
+static struct rsnd_mod_ops rsnd_dmaen_ops = {
+ .name = "audmac",
+ .prepare = rsnd_dmaen_prepare,
+ .cleanup = rsnd_dmaen_cleanup,
+ .start = rsnd_dmaen_start,
+ .stop = rsnd_dmaen_stop,
+ .pointer = rsnd_dmaen_pointer,
+ .get_status = rsnd_mod_get_status,
+};
+
+/*
+ * Audio DMAC peri peri
+ */
+static const u8 gen2_id_table_ssiu[] = {
+ /* SSI00 ~ SSI07 */
+ 0x00, 0x01, 0x02, 0x03, 0x39, 0x3a, 0x3b, 0x3c,
+ /* SSI10 ~ SSI17 */
+ 0x04, 0x05, 0x06, 0x07, 0x3d, 0x3e, 0x3f, 0x40,
+ /* SSI20 ~ SSI27 */
+ 0x08, 0x09, 0x0a, 0x0b, 0x41, 0x42, 0x43, 0x44,
+ /* SSI30 ~ SSI37 */
+ 0x0c, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b,
+ /* SSI40 ~ SSI47 */
+ 0x0d, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52,
+ /* SSI5 */
+ 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ /* SSI6 */
+ 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ /* SSI7 */
+ 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ /* SSI8 */
+ 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ /* SSI90 ~ SSI97 */
+ 0x12, 0x13, 0x14, 0x15, 0x53, 0x54, 0x55, 0x56,
+};
+static const u8 gen2_id_table_scu[] = {
+ 0x2d, /* SCU_SRCI0 */
+ 0x2e, /* SCU_SRCI1 */
+ 0x2f, /* SCU_SRCI2 */
+ 0x30, /* SCU_SRCI3 */
+ 0x31, /* SCU_SRCI4 */
+ 0x32, /* SCU_SRCI5 */
+ 0x33, /* SCU_SRCI6 */
+ 0x34, /* SCU_SRCI7 */
+ 0x35, /* SCU_SRCI8 */
+ 0x36, /* SCU_SRCI9 */
+};
+static const u8 gen2_id_table_cmd[] = {
+ 0x37, /* SCU_CMD0 */
+ 0x38, /* SCU_CMD1 */
+};
+
+static u32 rsnd_dmapp_get_id(struct rsnd_dai_stream *io,
+ struct rsnd_mod *mod)
+{
+ struct rsnd_mod *ssi = rsnd_io_to_mod_ssi(io);
+ struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
+ struct rsnd_mod *src = rsnd_io_to_mod_src(io);
+ struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
+ const u8 *entry = NULL;
+ int id = 255;
+ int size = 0;
+
+ if ((mod == ssi) ||
+ (mod == ssiu)) {
+ int busif = rsnd_mod_id_sub(ssiu);
+
+ entry = gen2_id_table_ssiu;
+ size = ARRAY_SIZE(gen2_id_table_ssiu);
+ id = (rsnd_mod_id(mod) * 8) + busif;
+ } else if (mod == src) {
+ entry = gen2_id_table_scu;
+ size = ARRAY_SIZE(gen2_id_table_scu);
+ id = rsnd_mod_id(mod);
+ } else if (mod == dvc) {
+ entry = gen2_id_table_cmd;
+ size = ARRAY_SIZE(gen2_id_table_cmd);
+ id = rsnd_mod_id(mod);
+ }
+
+ if ((!entry) || (size <= id)) {
+ struct device *dev = rsnd_priv_to_dev(rsnd_io_to_priv(io));
+
+ dev_err(dev, "unknown connection (%s)\n", rsnd_mod_name(mod));
+
+ /* use non-prohibited SRS number as error */
+ return 0x00; /* SSI00 */
+ }
+
+ return entry[id];
+}
+
+static u32 rsnd_dmapp_get_chcr(struct rsnd_dai_stream *io,
+ struct rsnd_mod *mod_from,
+ struct rsnd_mod *mod_to)
+{
+ return (rsnd_dmapp_get_id(io, mod_from) << 24) +
+ (rsnd_dmapp_get_id(io, mod_to) << 16);
+}
+
+#define rsnd_dmapp_addr(dmac, dma, reg) \
+ (dmac->ppbase + 0x20 + reg + \
+ (0x10 * rsnd_dma_to_dmapp(dma)->dmapp_id))
+static void rsnd_dmapp_write(struct rsnd_dma *dma, u32 data, u32 reg)
+{
+ struct rsnd_mod *mod = rsnd_mod_get(dma);
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
+ struct device *dev = rsnd_priv_to_dev(priv);
+
+ dev_dbg(dev, "w 0x%px : %08x\n", rsnd_dmapp_addr(dmac, dma, reg), data);
+
+ iowrite32(data, rsnd_dmapp_addr(dmac, dma, reg));
+}
+
+static u32 rsnd_dmapp_read(struct rsnd_dma *dma, u32 reg)
+{
+ struct rsnd_mod *mod = rsnd_mod_get(dma);
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
+
+ return ioread32(rsnd_dmapp_addr(dmac, dma, reg));
+}
+
+static void rsnd_dmapp_bset(struct rsnd_dma *dma, u32 data, u32 mask, u32 reg)
+{
+ struct rsnd_mod *mod = rsnd_mod_get(dma);
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
+ void __iomem *addr = rsnd_dmapp_addr(dmac, dma, reg);
+ u32 val = ioread32(addr);
+
+ val &= ~mask;
+ val |= (data & mask);
+
+ iowrite32(val, addr);
+}
+
+static int rsnd_dmapp_stop(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ struct rsnd_priv *priv)
+{
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+ int i;
+
+ rsnd_dmapp_bset(dma, 0, PDMACHCR_DE, PDMACHCR);
+
+ for (i = 0; i < 1024; i++) {
+ if (0 == (rsnd_dmapp_read(dma, PDMACHCR) & PDMACHCR_DE))
+ return 0;
+ udelay(1);
+ }
+
+ return -EIO;
+}
+
+static int rsnd_dmapp_start(struct rsnd_mod *mod,
+ struct rsnd_dai_stream *io,
+ struct rsnd_priv *priv)
+{
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+ struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
+
+ rsnd_dmapp_write(dma, dma->src_addr, PDMASAR);
+ rsnd_dmapp_write(dma, dma->dst_addr, PDMADAR);
+ rsnd_dmapp_write(dma, dmapp->chcr, PDMACHCR);
+
+ return 0;
+}
+
+static int rsnd_dmapp_attach(struct rsnd_dai_stream *io,
+ struct rsnd_dma *dma,
+ struct rsnd_mod *mod_from, struct rsnd_mod *mod_to)
+{
+ struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
+ struct rsnd_priv *priv = rsnd_io_to_priv(io);
+ struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
+ struct device *dev = rsnd_priv_to_dev(priv);
+
+ dmapp->dmapp_id = dmac->dmapp_num;
+ dmapp->chcr = rsnd_dmapp_get_chcr(io, mod_from, mod_to) | PDMACHCR_DE;
+
+ dmac->dmapp_num++;
+
+ dev_dbg(dev, "id/src/dst/chcr = %d/%pad/%pad/%08x\n",
+ dmapp->dmapp_id, &dma->src_addr, &dma->dst_addr, dmapp->chcr);
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void rsnd_dmapp_debug_info(struct seq_file *m,
+ struct rsnd_dai_stream *io,
+ struct rsnd_mod *mod)
+{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
+ struct rsnd_dma *dma = rsnd_mod_to_dma(mod);
+ struct rsnd_dmapp *dmapp = rsnd_dma_to_dmapp(dma);
+
+ rsnd_debugfs_reg_show(m, dmac->ppres, dmac->ppbase,
+ 0x20 + 0x10 * dmapp->dmapp_id, 0x10);
+}
+#define DEBUG_INFO .debug_info = rsnd_dmapp_debug_info
+#else
+#define DEBUG_INFO
+#endif
+
+static struct rsnd_mod_ops rsnd_dmapp_ops = {
+ .name = "audmac-pp",
+ .start = rsnd_dmapp_start,
+ .stop = rsnd_dmapp_stop,
+ .quit = rsnd_dmapp_stop,
+ .get_status = rsnd_mod_get_status,
+ DEBUG_INFO
+};
+
+/*
+ * Common DMAC Interface
+ */
+
+/*
+ * DMA read/write register offset
+ *
+ * RSND_xxx_I_N for Audio DMAC input
+ * RSND_xxx_O_N for Audio DMAC output
+ * RSND_xxx_I_P for Audio DMAC peri peri input
+ * RSND_xxx_O_P for Audio DMAC peri peri output
+ *
+ * ex) R-Car H2 case
+ * mod / DMAC in / DMAC out / DMAC PP in / DMAC pp out
+ * SSI : 0xec541000 / 0xec241008 / 0xec24100c
+ * SSIU: 0xec541000 / 0xec100000 / 0xec100000 / 0xec400000 / 0xec400000
+ * SCU : 0xec500000 / 0xec000000 / 0xec004000 / 0xec300000 / 0xec304000
+ * CMD : 0xec500000 / / 0xec008000 0xec308000
+ */
+#define RDMA_SSI_I_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0x8)
+#define RDMA_SSI_O_N(addr, i) (addr ##_reg - 0x00300000 + (0x40 * i) + 0xc)
+
+#define RDMA_SSIU_I_N(addr, i, j) (addr ##_reg - 0x00441000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4)))
+#define RDMA_SSIU_O_N(addr, i, j) RDMA_SSIU_I_N(addr, i, j)
+
+#define RDMA_SSIU_I_P(addr, i, j) (addr ##_reg - 0x00141000 + (0x1000 * (i)) + (((j) / 4) * 0xA000) + (((j) % 4) * 0x400) - (0x4000 * ((i) / 9) * ((j) / 4)))
+#define RDMA_SSIU_O_P(addr, i, j) RDMA_SSIU_I_P(addr, i, j)
+
+#define RDMA_SRC_I_N(addr, i) (addr ##_reg - 0x00500000 + (0x400 * i))
+#define RDMA_SRC_O_N(addr, i) (addr ##_reg - 0x004fc000 + (0x400 * i))
+
+#define RDMA_SRC_I_P(addr, i) (addr ##_reg - 0x00200000 + (0x400 * i))
+#define RDMA_SRC_O_P(addr, i) (addr ##_reg - 0x001fc000 + (0x400 * i))
+
+#define RDMA_CMD_O_N(addr, i) (addr ##_reg - 0x004f8000 + (0x400 * i))
+#define RDMA_CMD_O_P(addr, i) (addr ##_reg - 0x001f8000 + (0x400 * i))
+
+static dma_addr_t
+rsnd_gen2_dma_addr(struct rsnd_dai_stream *io,
+ struct rsnd_mod *mod,
+ int is_play, int is_from)
+{
+ struct rsnd_priv *priv = rsnd_io_to_priv(io);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ phys_addr_t ssi_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SSI);
+ phys_addr_t src_reg = rsnd_gen_get_phy_addr(priv, RSND_GEN2_SCU);
+ int is_ssi = !!(rsnd_io_to_mod_ssi(io) == mod) ||
+ !!(rsnd_io_to_mod_ssiu(io) == mod);
+ int use_src = !!rsnd_io_to_mod_src(io);
+ int use_cmd = !!rsnd_io_to_mod_dvc(io) ||
+ !!rsnd_io_to_mod_mix(io) ||
+ !!rsnd_io_to_mod_ctu(io);
+ int id = rsnd_mod_id(mod);
+ int busif = rsnd_mod_id_sub(rsnd_io_to_mod_ssiu(io));
+ struct dma_addr {
+ dma_addr_t out_addr;
+ dma_addr_t in_addr;
+ } dma_addrs[3][2][3] = {
+ /* SRC */
+ /* Capture */
+ {{{ 0, 0 },
+ { RDMA_SRC_O_N(src, id), RDMA_SRC_I_P(src, id) },
+ { RDMA_CMD_O_N(src, id), RDMA_SRC_I_P(src, id) } },
+ /* Playback */
+ {{ 0, 0, },
+ { RDMA_SRC_O_P(src, id), RDMA_SRC_I_N(src, id) },
+ { RDMA_CMD_O_P(src, id), RDMA_SRC_I_N(src, id) } }
+ },
+ /* SSI */
+ /* Capture */
+ {{{ RDMA_SSI_O_N(ssi, id), 0 },
+ { RDMA_SSIU_O_P(ssi, id, busif), 0 },
+ { RDMA_SSIU_O_P(ssi, id, busif), 0 } },
+ /* Playback */
+ {{ 0, RDMA_SSI_I_N(ssi, id) },
+ { 0, RDMA_SSIU_I_P(ssi, id, busif) },
+ { 0, RDMA_SSIU_I_P(ssi, id, busif) } }
+ },
+ /* SSIU */
+ /* Capture */
+ {{{ RDMA_SSIU_O_N(ssi, id, busif), 0 },
+ { RDMA_SSIU_O_P(ssi, id, busif), 0 },
+ { RDMA_SSIU_O_P(ssi, id, busif), 0 } },
+ /* Playback */
+ {{ 0, RDMA_SSIU_I_N(ssi, id, busif) },
+ { 0, RDMA_SSIU_I_P(ssi, id, busif) },
+ { 0, RDMA_SSIU_I_P(ssi, id, busif) } } },
+ };
+
+ /*
+ * FIXME
+ *
+ * We can't support SSI9-4/5/6/7, because its address is
+ * out of calculation rule
+ */
+ if ((id == 9) && (busif >= 4))
+ dev_err(dev, "This driver doesn't support SSI%d-%d, so far",
+ id, busif);
+
+ /* it shouldn't happen */
+ if (use_cmd && !use_src)
+ dev_err(dev, "DVC is selected without SRC\n");
+
+ /* use SSIU or SSI ? */
+ if (is_ssi && rsnd_ssi_use_busif(io))
+ is_ssi++;
+
+ return (is_from) ?
+ dma_addrs[is_ssi][is_play][use_src + use_cmd].out_addr :
+ dma_addrs[is_ssi][is_play][use_src + use_cmd].in_addr;
+}
+
+static dma_addr_t rsnd_dma_addr(struct rsnd_dai_stream *io,
+ struct rsnd_mod *mod,
+ int is_play, int is_from)
+{
+ struct rsnd_priv *priv = rsnd_io_to_priv(io);
+
+ /*
+ * gen1 uses default DMA addr
+ */
+ if (rsnd_is_gen1(priv))
+ return 0;
+
+ if (!mod)
+ return 0;
+
+ return rsnd_gen2_dma_addr(io, mod, is_play, is_from);
+}
+
+#define MOD_MAX (RSND_MOD_MAX + 1) /* +Memory */
+static void rsnd_dma_of_path(struct rsnd_mod *this,
+ struct rsnd_dai_stream *io,
+ int is_play,
+ struct rsnd_mod **mod_from,
+ struct rsnd_mod **mod_to)
+{
+ struct rsnd_mod *ssi;
+ struct rsnd_mod *src = rsnd_io_to_mod_src(io);
+ struct rsnd_mod *ctu = rsnd_io_to_mod_ctu(io);
+ struct rsnd_mod *mix = rsnd_io_to_mod_mix(io);
+ struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io);
+ struct rsnd_mod *mod[MOD_MAX];
+ struct rsnd_mod *mod_start, *mod_end;
+ struct rsnd_priv *priv = rsnd_mod_to_priv(this);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ int nr, i, idx;
+
+ /*
+ * It should use "rcar_sound,ssiu" on DT.
+ * But, we need to keep compatibility for old version.
+ *
+ * If it has "rcar_sound.ssiu", it will be used.
+ * If not, "rcar_sound.ssi" will be used.
+ * see
+ * rsnd_ssiu_dma_req()
+ * rsnd_ssi_dma_req()
+ */
+ if (rsnd_ssiu_of_node(priv)) {
+ struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
+
+ /* use SSIU */
+ ssi = ssiu;
+ if (this == rsnd_io_to_mod_ssi(io))
+ this = ssiu;
+ } else {
+ /* keep compatible, use SSI */
+ ssi = rsnd_io_to_mod_ssi(io);
+ }
+
+ if (!ssi)
+ return;
+
+ nr = 0;
+ for (i = 0; i < MOD_MAX; i++) {
+ mod[i] = NULL;
+ nr += !!rsnd_io_to_mod(io, i);
+ }
+
+ /*
+ * [S] -*-> [E]
+ * [S] -*-> SRC -o-> [E]
+ * [S] -*-> SRC -> DVC -o-> [E]
+ * [S] -*-> SRC -> CTU -> MIX -> DVC -o-> [E]
+ *
+ * playback [S] = mem
+ * [E] = SSI
+ *
+ * capture [S] = SSI
+ * [E] = mem
+ *
+ * -*-> Audio DMAC
+ * -o-> Audio DMAC peri peri
+ */
+ mod_start = (is_play) ? NULL : ssi;
+ mod_end = (is_play) ? ssi : NULL;
+
+ idx = 0;
+ mod[idx++] = mod_start;
+ for (i = 1; i < nr; i++) {
+ if (src) {
+ mod[idx++] = src;
+ src = NULL;
+ } else if (ctu) {
+ mod[idx++] = ctu;
+ ctu = NULL;
+ } else if (mix) {
+ mod[idx++] = mix;
+ mix = NULL;
+ } else if (dvc) {
+ mod[idx++] = dvc;
+ dvc = NULL;
+ }
+ }
+ mod[idx] = mod_end;
+
+ /*
+ * | SSI | SRC |
+ * -------------+-----+-----+
+ * is_play | o | * |
+ * !is_play | * | o |
+ */
+ if ((this == ssi) == (is_play)) {
+ *mod_from = mod[idx - 1];
+ *mod_to = mod[idx];
+ } else {
+ *mod_from = mod[0];
+ *mod_to = mod[1];
+ }
+
+ dev_dbg(dev, "module connection (this is %s)\n", rsnd_mod_name(this));
+ for (i = 0; i <= idx; i++) {
+ dev_dbg(dev, " %s%s\n",
+ rsnd_mod_name(mod[i] ? mod[i] : &mem),
+ (mod[i] == *mod_from) ? " from" :
+ (mod[i] == *mod_to) ? " to" : "");
+ }
+}
+
+static int rsnd_dma_alloc(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
+ struct rsnd_mod **dma_mod)
+{
+ struct rsnd_mod *mod_from = NULL;
+ struct rsnd_mod *mod_to = NULL;
+ struct rsnd_priv *priv = rsnd_io_to_priv(io);
+ struct rsnd_dma_ctrl *dmac = rsnd_priv_to_dmac(priv);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ struct rsnd_dma *dma;
+ struct rsnd_mod_ops *ops;
+ enum rsnd_mod_type type;
+ int (*attach)(struct rsnd_dai_stream *io, struct rsnd_dma *dma,
+ struct rsnd_mod *mod_from, struct rsnd_mod *mod_to);
+ int is_play = rsnd_io_is_play(io);
+ int ret, dma_id;
+
+ /*
+ * DMA failed. try to PIO mode
+ * see
+ * rsnd_ssi_fallback()
+ * rsnd_rdai_continuance_probe()
+ */
+ if (!dmac)
+ return -EAGAIN;
+
+ rsnd_dma_of_path(mod, io, is_play, &mod_from, &mod_to);
+
+ /* for Gen2 or later */
+ if (mod_from && mod_to) {
+ ops = &rsnd_dmapp_ops;
+ attach = rsnd_dmapp_attach;
+ dma_id = dmac->dmapp_num;
+ type = RSND_MOD_AUDMAPP;
+ } else {
+ ops = &rsnd_dmaen_ops;
+ attach = rsnd_dmaen_attach;
+ dma_id = dmac->dmaen_num;
+ type = RSND_MOD_AUDMA;
+ }
+
+ /* for Gen1, overwrite */
+ if (rsnd_is_gen1(priv)) {
+ ops = &rsnd_dmaen_ops;
+ attach = rsnd_dmaen_attach;
+ dma_id = dmac->dmaen_num;
+ type = RSND_MOD_AUDMA;
+ }
+
+ dma = devm_kzalloc(dev, sizeof(*dma), GFP_KERNEL);
+ if (!dma)
+ return -ENOMEM;
+
+ *dma_mod = rsnd_mod_get(dma);
+
+ ret = rsnd_mod_init(priv, *dma_mod, ops, NULL,
+ type, dma_id);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(dev, "%s %s -> %s\n",
+ rsnd_mod_name(*dma_mod),
+ rsnd_mod_name(mod_from ? mod_from : &mem),
+ rsnd_mod_name(mod_to ? mod_to : &mem));
+
+ ret = attach(io, dma, mod_from, mod_to);
+ if (ret < 0)
+ return ret;
+
+ dma->src_addr = rsnd_dma_addr(io, mod_from, is_play, 1);
+ dma->dst_addr = rsnd_dma_addr(io, mod_to, is_play, 0);
+ dma->mod_from = mod_from;
+ dma->mod_to = mod_to;
+
+ return 0;
+}
+
+int rsnd_dma_attach(struct rsnd_dai_stream *io, struct rsnd_mod *mod,
+ struct rsnd_mod **dma_mod)
+{
+ if (!(*dma_mod)) {
+ int ret = rsnd_dma_alloc(io, mod, dma_mod);
+
+ if (ret < 0)
+ return ret;
+ }
+
+ return rsnd_dai_connect(*dma_mod, io, (*dma_mod)->type);
+}
+
+int rsnd_dma_probe(struct rsnd_priv *priv)
+{
+ struct platform_device *pdev = rsnd_priv_to_pdev(priv);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ struct rsnd_dma_ctrl *dmac;
+ struct resource *res;
+
+ /*
+ * for Gen1
+ */
+ if (rsnd_is_gen1(priv))
+ return 0;
+
+ /*
+ * for Gen2 or later
+ */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "audmapp");
+ dmac = devm_kzalloc(dev, sizeof(*dmac), GFP_KERNEL);
+ if (!dmac || !res) {
+ dev_err(dev, "dma allocate failed\n");
+ return 0; /* it will be PIO mode */
+ }
+
+ dmac->dmapp_num = 0;
+ dmac->ppres = res->start;
+ dmac->ppbase = devm_ioremap_resource(dev, res);
+ if (IS_ERR(dmac->ppbase))
+ return PTR_ERR(dmac->ppbase);
+
+ priv->dma = dmac;
+
+ /* dummy mem mod for debug */
+ return rsnd_mod_init(NULL, &mem, &mem_ops, NULL, 0, 0);
+}