| /* |
| * Renesas R-Car SSIU/SSI support |
| * |
| * Copyright (C) 2013 Renesas Solutions Corp. |
| * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> |
| * |
| * Based on fsi.c |
| * Kuninori Morimoto <morimoto.kuninori@renesas.com> |
| * |
| * 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/delay.h> |
| #include "rsnd.h" |
| #define RSND_SSI_NAME_SIZE 16 |
| |
| /* |
| * SSICR |
| */ |
| #define FORCE (1 << 31) /* Fixed */ |
| #define DMEN (1 << 28) /* DMA Enable */ |
| #define UIEN (1 << 27) /* Underflow Interrupt Enable */ |
| #define OIEN (1 << 26) /* Overflow Interrupt Enable */ |
| #define IIEN (1 << 25) /* Idle Mode Interrupt Enable */ |
| #define DIEN (1 << 24) /* Data Interrupt Enable */ |
| #define CHNL_4 (1 << 22) /* Channels */ |
| #define CHNL_6 (2 << 22) /* Channels */ |
| #define CHNL_8 (3 << 22) /* Channels */ |
| #define DWL_8 (0 << 19) /* Data Word Length */ |
| #define DWL_16 (1 << 19) /* Data Word Length */ |
| #define DWL_18 (2 << 19) /* Data Word Length */ |
| #define DWL_20 (3 << 19) /* Data Word Length */ |
| #define DWL_22 (4 << 19) /* Data Word Length */ |
| #define DWL_24 (5 << 19) /* Data Word Length */ |
| #define DWL_32 (6 << 19) /* Data Word Length */ |
| |
| #define SWL_32 (3 << 16) /* R/W System Word Length */ |
| #define SCKD (1 << 15) /* Serial Bit Clock Direction */ |
| #define SWSD (1 << 14) /* Serial WS Direction */ |
| #define SCKP (1 << 13) /* Serial Bit Clock Polarity */ |
| #define SWSP (1 << 12) /* Serial WS Polarity */ |
| #define SDTA (1 << 10) /* Serial Data Alignment */ |
| #define PDTA (1 << 9) /* Parallel Data Alignment */ |
| #define DEL (1 << 8) /* Serial Data Delay */ |
| #define CKDV(v) (v << 4) /* Serial Clock Division Ratio */ |
| #define TRMD (1 << 1) /* Transmit/Receive Mode Select */ |
| #define EN (1 << 0) /* SSI Module Enable */ |
| |
| /* |
| * SSISR |
| */ |
| #define UIRQ (1 << 27) /* Underflow Error Interrupt Status */ |
| #define OIRQ (1 << 26) /* Overflow Error Interrupt Status */ |
| #define IIRQ (1 << 25) /* Idle Mode Interrupt Status */ |
| #define DIRQ (1 << 24) /* Data Interrupt Status Flag */ |
| |
| /* |
| * SSIWSR |
| */ |
| #define CONT (1 << 8) /* WS Continue Function */ |
| #define WS_MODE (1 << 0) /* WS Mode */ |
| |
| #define SSI_NAME "ssi" |
| |
| struct rsnd_ssi { |
| struct rsnd_mod mod; |
| struct rsnd_mod *dma; |
| |
| u32 flags; |
| u32 cr_own; |
| u32 cr_clk; |
| u32 cr_mode; |
| u32 wsr; |
| int chan; |
| int rate; |
| int irq; |
| unsigned int usrcnt; |
| }; |
| |
| /* flags */ |
| #define RSND_SSI_CLK_PIN_SHARE (1 << 0) |
| #define RSND_SSI_NO_BUSIF (1 << 1) /* SSI+DMA without BUSIF */ |
| |
| #define for_each_rsnd_ssi(pos, priv, i) \ |
| for (i = 0; \ |
| (i < rsnd_ssi_nr(priv)) && \ |
| ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \ |
| i++) |
| |
| #define rsnd_ssi_get(priv, id) ((struct rsnd_ssi *)(priv->ssi) + id) |
| #define rsnd_ssi_to_dma(mod) ((ssi)->dma) |
| #define rsnd_ssi_nr(priv) ((priv)->ssi_nr) |
| #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod) |
| #define rsnd_ssi_mode_flags(p) ((p)->flags) |
| #define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io)) |
| #define rsnd_ssi_is_multi_slave(mod, io) \ |
| (rsnd_ssi_multi_slaves(io) & (1 << rsnd_mod_id(mod))) |
| #define rsnd_ssi_is_run_mods(mod, io) \ |
| (rsnd_ssi_run_mods(io) & (1 << rsnd_mod_id(mod))) |
| |
| int rsnd_ssi_use_busif(struct rsnd_dai_stream *io) |
| { |
| struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io); |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| int use_busif = 0; |
| |
| if (!rsnd_ssi_is_dma_mode(mod)) |
| return 0; |
| |
| if (!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_NO_BUSIF)) |
| use_busif = 1; |
| if (rsnd_io_to_mod_src(io)) |
| use_busif = 1; |
| |
| return use_busif; |
| } |
| |
| static void rsnd_ssi_status_clear(struct rsnd_mod *mod) |
| { |
| rsnd_mod_write(mod, SSISR, 0); |
| } |
| |
| static u32 rsnd_ssi_status_get(struct rsnd_mod *mod) |
| { |
| return rsnd_mod_read(mod, SSISR); |
| } |
| |
| static void rsnd_ssi_status_check(struct rsnd_mod *mod, |
| u32 bit) |
| { |
| struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| struct device *dev = rsnd_priv_to_dev(priv); |
| u32 status; |
| int i; |
| |
| for (i = 0; i < 1024; i++) { |
| status = rsnd_ssi_status_get(mod); |
| if (status & bit) |
| return; |
| |
| udelay(50); |
| } |
| |
| dev_warn(dev, "%s[%d] status check failed\n", |
| rsnd_mod_name(mod), rsnd_mod_id(mod)); |
| } |
| |
| static u32 rsnd_ssi_multi_slaves(struct rsnd_dai_stream *io) |
| { |
| struct rsnd_mod *mod; |
| enum rsnd_mod_type types[] = { |
| RSND_MOD_SSIM1, |
| RSND_MOD_SSIM2, |
| RSND_MOD_SSIM3, |
| }; |
| int i, mask; |
| |
| mask = 0; |
| for (i = 0; i < ARRAY_SIZE(types); i++) { |
| mod = rsnd_io_to_mod(io, types[i]); |
| if (!mod) |
| continue; |
| |
| mask |= 1 << rsnd_mod_id(mod); |
| } |
| |
| return mask; |
| } |
| |
| static u32 rsnd_ssi_run_mods(struct rsnd_dai_stream *io) |
| { |
| struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io); |
| struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); |
| |
| return rsnd_ssi_multi_slaves_runtime(io) | |
| 1 << rsnd_mod_id(ssi_mod) | |
| 1 << rsnd_mod_id(ssi_parent_mod); |
| } |
| |
| u32 rsnd_ssi_multi_slaves_runtime(struct rsnd_dai_stream *io) |
| { |
| if (rsnd_runtime_is_ssi_multi(io)) |
| return rsnd_ssi_multi_slaves(io); |
| |
| return 0; |
| } |
| |
| static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io) |
| { |
| struct rsnd_priv *priv = rsnd_io_to_priv(io); |
| struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
| struct device *dev = rsnd_priv_to_dev(priv); |
| struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); |
| int chan = rsnd_runtime_channel_for_ssi(io); |
| int j, ret; |
| int ssi_clk_mul_table[] = { |
| 1, 2, 4, 8, 16, 6, 12, |
| }; |
| unsigned int main_rate; |
| unsigned int rate = rsnd_src_get_ssi_rate(priv, io, runtime); |
| |
| if (!rsnd_rdai_is_clk_master(rdai)) |
| return 0; |
| |
| if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io)) |
| return 0; |
| |
| if (rsnd_ssi_is_multi_slave(mod, io)) |
| return 0; |
| |
| if (ssi->usrcnt > 1) { |
| if (ssi->rate != rate) { |
| dev_err(dev, "SSI parent/child should use same rate\n"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Find best clock, and try to start ADG |
| */ |
| for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { |
| |
| /* |
| * this driver is assuming that |
| * system word is 32bit x chan |
| * see rsnd_ssi_init() |
| */ |
| main_rate = rate * 32 * chan * ssi_clk_mul_table[j]; |
| |
| ret = rsnd_adg_ssi_clk_try_start(mod, main_rate); |
| if (0 == ret) { |
| ssi->cr_clk = FORCE | SWL_32 | |
| SCKD | SWSD | CKDV(j); |
| ssi->wsr = CONT; |
| |
| ssi->rate = rate; |
| |
| dev_dbg(dev, "%s[%d] outputs %u Hz\n", |
| rsnd_mod_name(mod), |
| rsnd_mod_id(mod), rate); |
| |
| return 0; |
| } |
| } |
| |
| dev_err(dev, "unsupported clock rate\n"); |
| return -EIO; |
| } |
| |
| static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io) |
| { |
| struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); |
| |
| if (!rsnd_rdai_is_clk_master(rdai)) |
| return; |
| |
| if (ssi_parent_mod && !rsnd_ssi_is_parent(mod, io)) |
| return; |
| |
| if (ssi->usrcnt > 1) |
| return; |
| |
| ssi->cr_clk = 0; |
| ssi->rate = 0; |
| |
| rsnd_adg_ssi_clk_stop(mod); |
| } |
| |
| static void rsnd_ssi_config_init(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io) |
| { |
| struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
| struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| u32 cr_own; |
| u32 cr_mode; |
| u32 wsr; |
| int is_tdm; |
| |
| is_tdm = rsnd_runtime_is_ssi_tdm(io); |
| |
| /* |
| * always use 32bit system word. |
| * see also rsnd_ssi_master_clk_enable() |
| */ |
| cr_own = FORCE | SWL_32 | PDTA; |
| |
| if (rdai->bit_clk_inv) |
| cr_own |= SCKP; |
| if (rdai->frm_clk_inv ^ is_tdm) |
| cr_own |= SWSP; |
| if (rdai->data_alignment) |
| cr_own |= SDTA; |
| if (rdai->sys_delay) |
| cr_own |= DEL; |
| if (rsnd_io_is_play(io)) |
| cr_own |= TRMD; |
| |
| switch (runtime->sample_bits) { |
| case 16: |
| cr_own |= DWL_16; |
| break; |
| case 32: |
| cr_own |= DWL_24; |
| break; |
| } |
| |
| if (rsnd_ssi_is_dma_mode(mod)) { |
| cr_mode = UIEN | OIEN | /* over/under run */ |
| DMEN; /* DMA : enable DMA */ |
| } else { |
| cr_mode = DIEN; /* PIO : enable Data interrupt */ |
| } |
| |
| /* |
| * TDM Extend Mode |
| * see |
| * rsnd_ssiu_init_gen2() |
| */ |
| wsr = ssi->wsr; |
| if (is_tdm) { |
| wsr |= WS_MODE; |
| cr_own |= CHNL_8; |
| } |
| |
| ssi->cr_own = cr_own; |
| ssi->cr_mode = cr_mode; |
| ssi->wsr = wsr; |
| } |
| |
| static void rsnd_ssi_register_setup(struct rsnd_mod *mod) |
| { |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| |
| rsnd_mod_write(mod, SSIWSR, ssi->wsr); |
| rsnd_mod_write(mod, SSICR, ssi->cr_own | |
| ssi->cr_clk | |
| ssi->cr_mode); /* without EN */ |
| } |
| |
| /* |
| * SSI mod common functions |
| */ |
| static int rsnd_ssi_init(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| int ret; |
| |
| if (!rsnd_ssi_is_run_mods(mod, io)) |
| return 0; |
| |
| ssi->usrcnt++; |
| |
| rsnd_mod_power_on(mod); |
| |
| ret = rsnd_ssi_master_clk_start(mod, io); |
| if (ret < 0) |
| return ret; |
| |
| if (!rsnd_ssi_is_parent(mod, io)) |
| rsnd_ssi_config_init(mod, io); |
| |
| rsnd_ssi_register_setup(mod); |
| |
| /* clear error status */ |
| rsnd_ssi_status_clear(mod); |
| |
| return 0; |
| } |
| |
| static int rsnd_ssi_quit(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| struct device *dev = rsnd_priv_to_dev(priv); |
| |
| if (!rsnd_ssi_is_run_mods(mod, io)) |
| return 0; |
| |
| if (!ssi->usrcnt) { |
| dev_err(dev, "%s[%d] usrcnt error\n", |
| rsnd_mod_name(mod), rsnd_mod_id(mod)); |
| return -EIO; |
| } |
| |
| if (!rsnd_ssi_is_parent(mod, io)) |
| ssi->cr_own = 0; |
| |
| rsnd_ssi_master_clk_stop(mod, io); |
| |
| rsnd_mod_power_off(mod); |
| |
| ssi->usrcnt--; |
| |
| return 0; |
| } |
| |
| static int rsnd_ssi_hw_params(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| int chan = params_channels(params); |
| |
| /* |
| * Already working. |
| * It will happen if SSI has parent/child connection. |
| */ |
| if (ssi->usrcnt > 1) { |
| /* |
| * it is error if child <-> parent SSI uses |
| * different channels. |
| */ |
| if (ssi->chan != chan) |
| return -EIO; |
| } |
| |
| ssi->chan = chan; |
| |
| return 0; |
| } |
| |
| static int rsnd_ssi_start(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| if (!rsnd_ssi_is_run_mods(mod, io)) |
| return 0; |
| |
| /* |
| * EN will be set via SSIU :: SSI_CONTROL |
| * if Multi channel mode |
| */ |
| if (rsnd_ssi_multi_slaves_runtime(io)) |
| return 0; |
| |
| rsnd_mod_bset(mod, SSICR, EN, EN); |
| |
| return 0; |
| } |
| |
| static int rsnd_ssi_stop(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| u32 cr; |
| |
| if (!rsnd_ssi_is_run_mods(mod, io)) |
| return 0; |
| |
| /* |
| * don't stop if not last user |
| * see also |
| * rsnd_ssi_start |
| * rsnd_ssi_interrupt |
| */ |
| if (ssi->usrcnt > 1) |
| return 0; |
| |
| /* |
| * disable all IRQ, |
| * and, wait all data was sent |
| */ |
| cr = ssi->cr_own | |
| ssi->cr_clk; |
| |
| rsnd_mod_write(mod, SSICR, cr | EN); |
| rsnd_ssi_status_check(mod, DIRQ); |
| |
| /* |
| * disable SSI, |
| * and, wait idle state |
| */ |
| rsnd_mod_write(mod, SSICR, cr); /* disabled all */ |
| rsnd_ssi_status_check(mod, IIRQ); |
| |
| return 0; |
| } |
| |
| static int rsnd_ssi_irq(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv, |
| int enable) |
| { |
| u32 val = 0; |
| |
| if (rsnd_is_gen1(priv)) |
| return 0; |
| |
| if (rsnd_ssi_is_parent(mod, io)) |
| return 0; |
| |
| if (!rsnd_ssi_is_run_mods(mod, io)) |
| return 0; |
| |
| if (enable) |
| val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000; |
| |
| rsnd_mod_write(mod, SSI_INT_ENABLE, val); |
| |
| return 0; |
| } |
| |
| static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io) |
| { |
| struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| int is_dma = rsnd_ssi_is_dma_mode(mod); |
| u32 status; |
| bool elapsed = false; |
| bool stop = false; |
| |
| spin_lock(&priv->lock); |
| |
| /* ignore all cases if not working */ |
| if (!rsnd_io_is_working(io)) |
| goto rsnd_ssi_interrupt_out; |
| |
| status = rsnd_ssi_status_get(mod); |
| |
| /* PIO only */ |
| if (!is_dma && (status & DIRQ)) { |
| struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); |
| u32 *buf = (u32 *)(runtime->dma_area + |
| rsnd_dai_pointer_offset(io, 0)); |
| |
| /* |
| * 8/16/32 data can be assesse to TDR/RDR register |
| * directly as 32bit data |
| * see rsnd_ssi_init() |
| */ |
| if (rsnd_io_is_play(io)) |
| rsnd_mod_write(mod, SSITDR, *buf); |
| else |
| *buf = rsnd_mod_read(mod, SSIRDR); |
| |
| elapsed = rsnd_dai_pointer_update(io, sizeof(*buf)); |
| } |
| |
| /* DMA only */ |
| if (is_dma && (status & (UIRQ | OIRQ))) |
| stop = true; |
| |
| rsnd_ssi_status_clear(mod); |
| rsnd_ssi_interrupt_out: |
| spin_unlock(&priv->lock); |
| |
| if (elapsed) |
| rsnd_dai_period_elapsed(io); |
| |
| if (stop) |
| snd_pcm_stop_xrun(io->substream); |
| |
| } |
| |
| static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) |
| { |
| struct rsnd_mod *mod = data; |
| |
| rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* |
| * SSI PIO |
| */ |
| static void rsnd_ssi_parent_attach(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io) |
| { |
| struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
| struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| |
| if (!__rsnd_ssi_is_pin_sharing(mod)) |
| return; |
| |
| if (!rsnd_rdai_is_clk_master(rdai)) |
| return; |
| |
| switch (rsnd_mod_id(mod)) { |
| case 1: |
| case 2: |
| rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP); |
| break; |
| case 4: |
| rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP); |
| break; |
| case 8: |
| rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP); |
| break; |
| } |
| } |
| |
| static int rsnd_ssi_pcm_new(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct snd_soc_pcm_runtime *rtd) |
| { |
| /* |
| * rsnd_rdai_is_clk_master() will be enabled after set_fmt, |
| * and, pcm_new will be called after it. |
| * This function reuse pcm_new at this point. |
| */ |
| rsnd_ssi_parent_attach(mod, io); |
| |
| return 0; |
| } |
| |
| static int rsnd_ssi_common_probe(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct device *dev = rsnd_priv_to_dev(priv); |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| int ret; |
| |
| /* |
| * SSIP/SSIU/IRQ are not needed on |
| * SSI Multi slaves |
| */ |
| if (rsnd_ssi_is_multi_slave(mod, io)) |
| return 0; |
| |
| /* |
| * It can't judge ssi parent at this point |
| * see rsnd_ssi_pcm_new() |
| */ |
| |
| ret = rsnd_ssiu_attach(io, mod); |
| if (ret < 0) |
| return ret; |
| |
| ret = devm_request_irq(dev, ssi->irq, |
| rsnd_ssi_interrupt, |
| IRQF_SHARED, |
| dev_name(dev), mod); |
| |
| return ret; |
| } |
| |
| static struct rsnd_mod_ops rsnd_ssi_pio_ops = { |
| .name = SSI_NAME, |
| .probe = rsnd_ssi_common_probe, |
| .init = rsnd_ssi_init, |
| .quit = rsnd_ssi_quit, |
| .start = rsnd_ssi_start, |
| .stop = rsnd_ssi_stop, |
| .irq = rsnd_ssi_irq, |
| .pcm_new = rsnd_ssi_pcm_new, |
| .hw_params = rsnd_ssi_hw_params, |
| }; |
| |
| static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| int dma_id = 0; /* not needed */ |
| int ret; |
| |
| /* |
| * SSIP/SSIU/IRQ/DMA are not needed on |
| * SSI Multi slaves |
| */ |
| if (rsnd_ssi_is_multi_slave(mod, io)) |
| return 0; |
| |
| ret = rsnd_ssi_common_probe(mod, io, priv); |
| if (ret) |
| return ret; |
| |
| /* SSI probe might be called many times in MUX multi path */ |
| ret = rsnd_dma_attach(io, mod, &ssi->dma, dma_id); |
| |
| return ret; |
| } |
| |
| static int rsnd_ssi_dma_remove(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| struct device *dev = rsnd_priv_to_dev(priv); |
| int irq = ssi->irq; |
| |
| /* PIO will request IRQ again */ |
| devm_free_irq(dev, irq, mod); |
| |
| return 0; |
| } |
| |
| static int rsnd_ssi_fallback(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct device *dev = rsnd_priv_to_dev(priv); |
| |
| /* |
| * fallback to PIO |
| * |
| * SSI .probe might be called again. |
| * see |
| * rsnd_rdai_continuance_probe() |
| */ |
| mod->ops = &rsnd_ssi_pio_ops; |
| |
| dev_info(dev, "%s[%d] fallback to PIO mode\n", |
| rsnd_mod_name(mod), rsnd_mod_id(mod)); |
| |
| return 0; |
| } |
| |
| static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io, |
| struct rsnd_mod *mod) |
| { |
| struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| int is_play = rsnd_io_is_play(io); |
| char *name; |
| |
| if (rsnd_ssi_use_busif(io)) |
| name = is_play ? "rxu" : "txu"; |
| else |
| name = is_play ? "rx" : "tx"; |
| |
| return rsnd_dma_request_channel(rsnd_ssi_of_node(priv), |
| mod, name); |
| } |
| |
| static struct rsnd_mod_ops rsnd_ssi_dma_ops = { |
| .name = SSI_NAME, |
| .dma_req = rsnd_ssi_dma_req, |
| .probe = rsnd_ssi_dma_probe, |
| .remove = rsnd_ssi_dma_remove, |
| .init = rsnd_ssi_init, |
| .quit = rsnd_ssi_quit, |
| .start = rsnd_ssi_start, |
| .stop = rsnd_ssi_stop, |
| .irq = rsnd_ssi_irq, |
| .pcm_new = rsnd_ssi_pcm_new, |
| .fallback = rsnd_ssi_fallback, |
| .hw_params = rsnd_ssi_hw_params, |
| }; |
| |
| int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) |
| { |
| return mod->ops == &rsnd_ssi_dma_ops; |
| } |
| |
| |
| /* |
| * Non SSI |
| */ |
| static struct rsnd_mod_ops rsnd_ssi_non_ops = { |
| .name = SSI_NAME, |
| }; |
| |
| /* |
| * ssi mod function |
| */ |
| static void rsnd_ssi_connect(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io) |
| { |
| struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
| enum rsnd_mod_type types[] = { |
| RSND_MOD_SSI, |
| RSND_MOD_SSIM1, |
| RSND_MOD_SSIM2, |
| RSND_MOD_SSIM3, |
| }; |
| enum rsnd_mod_type type; |
| int i; |
| |
| /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */ |
| for (i = 0; i < ARRAY_SIZE(types); i++) { |
| type = types[i]; |
| if (!rsnd_io_to_mod(io, type)) { |
| rsnd_dai_connect(mod, io, type); |
| rsnd_set_slot(rdai, 2 * (i + 1), (i + 1)); |
| return; |
| } |
| } |
| } |
| |
| void rsnd_parse_connect_ssi(struct rsnd_dai *rdai, |
| struct device_node *playback, |
| struct device_node *capture) |
| { |
| struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); |
| struct device_node *node; |
| struct device_node *np; |
| struct rsnd_mod *mod; |
| int i; |
| |
| node = rsnd_ssi_of_node(priv); |
| if (!node) |
| return; |
| |
| i = 0; |
| for_each_child_of_node(node, np) { |
| mod = rsnd_ssi_mod_get(priv, i); |
| if (np == playback) |
| rsnd_ssi_connect(mod, &rdai->playback); |
| if (np == capture) |
| rsnd_ssi_connect(mod, &rdai->capture); |
| i++; |
| } |
| |
| of_node_put(node); |
| } |
| |
| struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) |
| { |
| if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv))) |
| id = 0; |
| |
| return rsnd_mod_get(rsnd_ssi_get(priv, id)); |
| } |
| |
| int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) |
| { |
| struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); |
| |
| return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE); |
| } |
| |
| static u32 *rsnd_ssi_get_status(struct rsnd_dai_stream *io, |
| struct rsnd_mod *mod, |
| enum rsnd_mod_type type) |
| { |
| /* |
| * SSIP (= SSI parent) needs to be special, otherwise, |
| * 2nd SSI might doesn't start. see also rsnd_mod_call() |
| * |
| * We can't include parent SSI status on SSI, because we don't know |
| * how many SSI requests parent SSI. Thus, it is localed on "io" now. |
| * ex) trouble case |
| * Playback: SSI0 |
| * Capture : SSI1 (needs SSI0) |
| * |
| * 1) start Capture -> SSI0/SSI1 are started. |
| * 2) start Playback -> SSI0 doesn't work, because it is already |
| * marked as "started" on 1) |
| * |
| * OTOH, using each mod's status is good for MUX case. |
| * It doesn't need to start in 2nd start |
| * ex) |
| * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0 |
| * | |
| * IO-1: SRC1 -> CTU2 -+ |
| * |
| * 1) start IO-0 -> start SSI0 |
| * 2) start IO-1 -> SSI0 doesn't need to start, because it is |
| * already started on 1) |
| */ |
| if (type == RSND_MOD_SSIP) |
| return &io->parent_ssi_status; |
| |
| return rsnd_mod_get_status(io, mod, type); |
| } |
| |
| int rsnd_ssi_probe(struct rsnd_priv *priv) |
| { |
| struct device_node *node; |
| struct device_node *np; |
| struct device *dev = rsnd_priv_to_dev(priv); |
| struct rsnd_mod_ops *ops; |
| struct clk *clk; |
| struct rsnd_ssi *ssi; |
| char name[RSND_SSI_NAME_SIZE]; |
| int i, nr, ret; |
| |
| node = rsnd_ssi_of_node(priv); |
| if (!node) |
| return -EINVAL; |
| |
| nr = of_get_child_count(node); |
| if (!nr) { |
| ret = -EINVAL; |
| goto rsnd_ssi_probe_done; |
| } |
| |
| ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL); |
| if (!ssi) { |
| ret = -ENOMEM; |
| goto rsnd_ssi_probe_done; |
| } |
| |
| priv->ssi = ssi; |
| priv->ssi_nr = nr; |
| |
| i = 0; |
| for_each_child_of_node(node, np) { |
| ssi = rsnd_ssi_get(priv, i); |
| |
| snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d", |
| SSI_NAME, i); |
| |
| clk = devm_clk_get(dev, name); |
| if (IS_ERR(clk)) { |
| ret = PTR_ERR(clk); |
| goto rsnd_ssi_probe_done; |
| } |
| |
| if (of_get_property(np, "shared-pin", NULL)) |
| ssi->flags |= RSND_SSI_CLK_PIN_SHARE; |
| |
| if (of_get_property(np, "no-busif", NULL)) |
| ssi->flags |= RSND_SSI_NO_BUSIF; |
| |
| ssi->irq = irq_of_parse_and_map(np, 0); |
| if (!ssi->irq) { |
| ret = -EINVAL; |
| goto rsnd_ssi_probe_done; |
| } |
| |
| ops = &rsnd_ssi_non_ops; |
| if (of_get_property(np, "pio-transfer", NULL)) |
| ops = &rsnd_ssi_pio_ops; |
| else |
| ops = &rsnd_ssi_dma_ops; |
| |
| ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk, |
| rsnd_ssi_get_status, RSND_MOD_SSI, i); |
| if (ret) |
| goto rsnd_ssi_probe_done; |
| |
| i++; |
| } |
| |
| ret = 0; |
| |
| rsnd_ssi_probe_done: |
| of_node_put(node); |
| |
| return ret; |
| } |
| |
| void rsnd_ssi_remove(struct rsnd_priv *priv) |
| { |
| struct rsnd_ssi *ssi; |
| int i; |
| |
| for_each_rsnd_ssi(ssi, priv, i) { |
| rsnd_mod_quit(rsnd_mod_get(ssi)); |
| } |
| } |