else
id = info->ssi_id_capture;
+ /* SSI */
+ mod = rsnd_ssi_mod_get(priv, id);
+ ret = rsnd_dai_connect(rdai, mod, io);
+ if (ret < 0)
+ return ret;
+
/* SCU */
mod = rsnd_scu_mod_get(priv, id);
ret = rsnd_dai_connect(rdai, mod, io);
RSND_GEN1_REG_MAP(gen, ADG, AUDIO_CLK_SEL3, 0x0, 0x18);
RSND_GEN1_REG_MAP(gen, ADG, AUDIO_CLK_SEL4, 0x0, 0x1c);
RSND_GEN1_REG_MAP(gen, ADG, AUDIO_CLK_SEL5, 0x0, 0x20);
+
+ RSND_GEN1_REG_MAP(gen, SSI, SSICR, 0x40, 0x00);
+ RSND_GEN1_REG_MAP(gen, SSI, SSISR, 0x40, 0x04);
+ RSND_GEN1_REG_MAP(gen, SSI, SSITDR, 0x40, 0x08);
+ RSND_GEN1_REG_MAP(gen, SSI, SSIRDR, 0x40, 0x0c);
+ RSND_GEN1_REG_MAP(gen, SSI, SSIWSR, 0x40, 0x20);
}
static int rsnd_gen1_probe(struct platform_device *pdev,
struct rsnd_gen *gen = rsnd_priv_to_gen(priv);
struct resource *sru_res;
struct resource *adg_res;
+ struct resource *ssi_res;
/*
* map address
*/
sru_res = platform_get_resource(pdev, IORESOURCE_MEM, RSND_GEN1_SRU);
adg_res = platform_get_resource(pdev, IORESOURCE_MEM, RSND_GEN1_ADG);
+ ssi_res = platform_get_resource(pdev, IORESOURCE_MEM, RSND_GEN1_SSI);
if (!sru_res ||
- !adg_res) {
+ !adg_res ||
+ !ssi_res) {
dev_err(dev, "Not enough SRU/SSI/ADG platform resources.\n");
return -ENODEV;
}
gen->base[RSND_GEN1_SRU] = devm_ioremap_resource(dev, sru_res);
gen->base[RSND_GEN1_ADG] = devm_ioremap_resource(dev, adg_res);
+ gen->base[RSND_GEN1_SSI] = devm_ioremap_resource(dev, ssi_res);
if (!gen->base[RSND_GEN1_SRU] ||
- !gen->base[RSND_GEN1_ADG]) {
+ !gen->base[RSND_GEN1_ADG] ||
+ !gen->base[RSND_GEN1_SSI]) {
dev_err(dev, "SRU/SSI/ADG ioremap failed\n");
return -ENODEV;
}
gen->base[RSND_GEN1_SRU]);
dev_dbg(dev, "ADG : %08x => %p\n", adg_res->start,
gen->base[RSND_GEN1_ADG]);
+ dev_dbg(dev, "SSI : %08x => %p\n", ssi_res->start,
+ gen->base[RSND_GEN1_SSI]);
return 0;
+
}
static void rsnd_gen1_remove(struct platform_device *pdev,
--- /dev/null
+/*
+ * 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 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 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 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 */
+
+struct rsnd_ssi {
+ struct clk *clk;
+ struct rsnd_ssi_platform_info *info; /* rcar_snd.h */
+ struct rsnd_ssi *parent;
+ struct rsnd_mod mod;
+
+ struct rsnd_dai *rdai;
+ struct rsnd_dai_stream *io;
+ u32 cr_own;
+ u32 cr_clk;
+ u32 cr_etc;
+ int err;
+ unsigned int usrcnt;
+ unsigned int rate;
+};
+
+struct rsnd_ssiu {
+ u32 ssi_mode0;
+ u32 ssi_mode1;
+
+ int ssi_nr;
+ struct rsnd_ssi *ssi;
+};
+
+#define for_each_rsnd_ssi(pos, priv, i) \
+ for (i = 0; \
+ (i < rsnd_ssi_nr(priv)) && \
+ ((pos) = ((struct rsnd_ssiu *)((priv)->ssiu))->ssi + i); \
+ i++)
+
+#define rsnd_ssi_nr(priv) (((struct rsnd_ssiu *)((priv)->ssiu))->ssi_nr)
+#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod)
+#define rsnd_ssi_is_pio(ssi) ((ssi)->info->pio_irq > 0)
+#define rsnd_ssi_clk_from_parent(ssi) ((ssi)->parent)
+#define rsnd_rdai_is_clk_master(rdai) ((rdai)->clk_master)
+#define rsnd_ssi_mode_flags(p) ((p)->info->flags)
+#define rsnd_ssi_to_ssiu(ssi)\
+ (((struct rsnd_ssiu *)((ssi) - rsnd_mod_id(&(ssi)->mod))) - 1)
+
+static void rsnd_ssi_mode_init(struct rsnd_priv *priv,
+ struct rsnd_ssiu *ssiu)
+{
+ struct rsnd_ssi *ssi;
+ u32 flags;
+ u32 val;
+ int i;
+
+ /*
+ * SSI_MODE0
+ */
+ ssiu->ssi_mode0 = 0;
+ for_each_rsnd_ssi(ssi, priv, i)
+ ssiu->ssi_mode0 |= (1 << i);
+
+ /*
+ * SSI_MODE1
+ */
+#define ssi_parent_set(p, sync, adg, ext) \
+ do { \
+ ssi->parent = ssiu->ssi + p; \
+ if (flags & RSND_SSI_CLK_FROM_ADG) \
+ val = adg; \
+ else \
+ val = ext; \
+ if (flags & RSND_SSI_SYNC) \
+ val |= sync; \
+ } while (0)
+
+ ssiu->ssi_mode1 = 0;
+ for_each_rsnd_ssi(ssi, priv, i) {
+ flags = rsnd_ssi_mode_flags(ssi);
+
+ if (!(flags & RSND_SSI_CLK_PIN_SHARE))
+ continue;
+
+ val = 0;
+ switch (i) {
+ case 1:
+ ssi_parent_set(0, (1 << 4), (0x2 << 0), (0x1 << 0));
+ break;
+ case 2:
+ ssi_parent_set(0, (1 << 4), (0x2 << 2), (0x1 << 2));
+ break;
+ case 4:
+ ssi_parent_set(3, (1 << 20), (0x2 << 16), (0x1 << 16));
+ break;
+ case 8:
+ ssi_parent_set(7, 0, 0, 0);
+ break;
+ }
+
+ ssiu->ssi_mode1 |= val;
+ }
+}
+
+static void rsnd_ssi_mode_set(struct rsnd_ssi *ssi)
+{
+ struct rsnd_ssiu *ssiu = rsnd_ssi_to_ssiu(ssi);
+
+ rsnd_mod_write(&ssi->mod, SSI_MODE0, ssiu->ssi_mode0);
+ rsnd_mod_write(&ssi->mod, SSI_MODE1, ssiu->ssi_mode1);
+}
+
+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_mod_read(mod, SSISR);
+ if (status & bit)
+ return;
+
+ udelay(50);
+ }
+
+ dev_warn(dev, "status check failed\n");
+}
+
+static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi,
+ unsigned int rate)
+{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ int i, j, ret;
+ int adg_clk_div_table[] = {
+ 1, 6, /* see adg.c */
+ };
+ int ssi_clk_mul_table[] = {
+ 1, 2, 4, 8, 16, 6, 12,
+ };
+ unsigned int main_rate;
+
+ /*
+ * Find best clock, and try to start ADG
+ */
+ for (i = 0; i < ARRAY_SIZE(adg_clk_div_table); i++) {
+ for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) {
+
+ /*
+ * this driver is assuming that
+ * system word is 64fs (= 2 x 32bit)
+ * see rsnd_ssi_start()
+ */
+ main_rate = rate / adg_clk_div_table[i]
+ * 32 * 2 * ssi_clk_mul_table[j];
+
+ ret = rsnd_adg_ssi_clk_try_start(&ssi->mod, main_rate);
+ if (0 == ret) {
+ ssi->rate = rate;
+ ssi->cr_clk = FORCE | SWL_32 |
+ SCKD | SWSD | CKDV(j);
+
+ dev_dbg(dev, "ssi%d outputs %u Hz\n",
+ rsnd_mod_id(&ssi->mod), rate);
+
+ return 0;
+ }
+ }
+ }
+
+ dev_err(dev, "unsupported clock rate\n");
+ return -EIO;
+}
+
+static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi)
+{
+ ssi->rate = 0;
+ ssi->cr_clk = 0;
+ rsnd_adg_ssi_clk_stop(&ssi->mod);
+}
+
+static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ u32 cr;
+
+ if (0 == ssi->usrcnt) {
+ clk_enable(ssi->clk);
+
+ if (rsnd_rdai_is_clk_master(rdai)) {
+ struct snd_pcm_runtime *runtime;
+
+ runtime = rsnd_io_to_runtime(io);
+
+ if (rsnd_ssi_clk_from_parent(ssi))
+ rsnd_ssi_hw_start(ssi->parent, rdai, io);
+ else
+ rsnd_ssi_master_clk_start(ssi, runtime->rate);
+ }
+ }
+
+ cr = ssi->cr_own |
+ ssi->cr_clk |
+ ssi->cr_etc |
+ EN;
+
+ rsnd_mod_write(&ssi->mod, SSICR, cr);
+
+ ssi->usrcnt++;
+
+ dev_dbg(dev, "ssi%d hw started\n", rsnd_mod_id(&ssi->mod));
+}
+
+static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi,
+ struct rsnd_dai *rdai)
+{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ u32 cr;
+
+ if (0 == ssi->usrcnt) /* stop might be called without start */
+ return;
+
+ ssi->usrcnt--;
+
+ if (0 == ssi->usrcnt) {
+ /*
+ * disable all IRQ,
+ * and, wait all data was sent
+ */
+ cr = ssi->cr_own |
+ ssi->cr_clk;
+
+ rsnd_mod_write(&ssi->mod, SSICR, cr | EN);
+ rsnd_ssi_status_check(&ssi->mod, DIRQ);
+
+ /*
+ * disable SSI,
+ * and, wait idle state
+ */
+ rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */
+ rsnd_ssi_status_check(&ssi->mod, IIRQ);
+
+ if (rsnd_rdai_is_clk_master(rdai)) {
+ if (rsnd_ssi_clk_from_parent(ssi))
+ rsnd_ssi_hw_stop(ssi->parent, rdai);
+ else
+ rsnd_ssi_master_clk_stop(ssi);
+ }
+
+ clk_disable(ssi->clk);
+ }
+
+ dev_dbg(dev, "ssi%d hw stopped\n", rsnd_mod_id(&ssi->mod));
+}
+
+/*
+ * SSI mod common functions
+ */
+static int rsnd_ssi_init(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+ u32 cr;
+
+ cr = FORCE;
+
+ /*
+ * always use 32bit system word for easy clock calculation.
+ * see also rsnd_ssi_master_clk_enable()
+ */
+ cr |= SWL_32;
+
+ /*
+ * init clock settings for SSICR
+ */
+ switch (runtime->sample_bits) {
+ case 16:
+ cr |= DWL_16;
+ break;
+ case 32:
+ cr |= DWL_24;
+ break;
+ default:
+ return -EIO;
+ }
+
+ if (rdai->bit_clk_inv)
+ cr |= SCKP;
+ if (rdai->frm_clk_inv)
+ cr |= SWSP;
+ if (rdai->data_alignment)
+ cr |= SDTA;
+ if (rdai->sys_delay)
+ cr |= DEL;
+ if (rsnd_dai_is_play(rdai, io))
+ cr |= TRMD;
+
+ /*
+ * set ssi parameter
+ */
+ ssi->rdai = rdai;
+ ssi->io = io;
+ ssi->cr_own = cr;
+ ssi->err = -1; /* ignore 1st error */
+
+ rsnd_ssi_mode_set(ssi);
+
+ dev_dbg(dev, "%s.%d init\n", rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+ return 0;
+}
+
+static int rsnd_ssi_quit(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+
+ dev_dbg(dev, "%s.%d quit\n", rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+ if (ssi->err > 0)
+ dev_warn(dev, "ssi under/over flow err = %d\n", ssi->err);
+
+ ssi->rdai = NULL;
+ ssi->io = NULL;
+ ssi->cr_own = 0;
+ ssi->err = 0;
+
+ return 0;
+}
+
+static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status)
+{
+ /* under/over flow error */
+ if (status & (UIRQ | OIRQ)) {
+ ssi->err++;
+
+ /* clear error status */
+ rsnd_mod_write(&ssi->mod, SSISR, 0);
+ }
+}
+
+/*
+ * SSI PIO
+ */
+static irqreturn_t rsnd_ssi_pio_interrupt(int irq, void *data)
+{
+ struct rsnd_ssi *ssi = data;
+ struct rsnd_dai_stream *io = ssi->io;
+ u32 status = rsnd_mod_read(&ssi->mod, SSISR);
+ irqreturn_t ret = IRQ_NONE;
+
+ if (io && (status & DIRQ)) {
+ struct rsnd_dai *rdai = ssi->rdai;
+ struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
+ u32 *buf = (u32 *)(runtime->dma_area +
+ rsnd_dai_pointer_offset(io, 0));
+
+ rsnd_ssi_record_error(ssi, status);
+
+ /*
+ * 8/16/32 data can be assesse to TDR/RDR register
+ * directly as 32bit data
+ * see rsnd_ssi_init()
+ */
+ if (rsnd_dai_is_play(rdai, io))
+ rsnd_mod_write(&ssi->mod, SSITDR, *buf);
+ else
+ *buf = rsnd_mod_read(&ssi->mod, SSIRDR);
+
+ rsnd_dai_pointer_update(io, sizeof(*buf));
+
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static int rsnd_ssi_pio_start(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+
+ /* enable PIO IRQ */
+ ssi->cr_etc = UIEN | OIEN | DIEN;
+
+ rsnd_ssi_hw_start(ssi, rdai, io);
+
+ dev_dbg(dev, "%s.%d start\n", rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+ return 0;
+}
+
+static int rsnd_ssi_pio_stop(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+ struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod);
+
+ dev_dbg(dev, "%s.%d stop\n", rsnd_mod_name(mod), rsnd_mod_id(mod));
+
+ ssi->cr_etc = 0;
+
+ rsnd_ssi_hw_stop(ssi, rdai);
+
+ return 0;
+}
+
+static struct rsnd_mod_ops rsnd_ssi_pio_ops = {
+ .name = "ssi (pio)",
+ .init = rsnd_ssi_init,
+ .quit = rsnd_ssi_quit,
+ .start = rsnd_ssi_pio_start,
+ .stop = rsnd_ssi_pio_stop,
+};
+
+/*
+ * Non SSI
+ */
+static int rsnd_ssi_non(struct rsnd_mod *mod,
+ struct rsnd_dai *rdai,
+ struct rsnd_dai_stream *io)
+{
+ struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
+ struct device *dev = rsnd_priv_to_dev(priv);
+
+ dev_dbg(dev, "%s\n", __func__);
+
+ return 0;
+}
+
+static struct rsnd_mod_ops rsnd_ssi_non_ops = {
+ .name = "ssi (non)",
+ .init = rsnd_ssi_non,
+ .quit = rsnd_ssi_non,
+ .start = rsnd_ssi_non,
+ .stop = rsnd_ssi_non,
+};
+
+/*
+ * ssi mod function
+ */
+struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id)
+{
+ BUG_ON(id < 0 || id >= rsnd_ssi_nr(priv));
+
+ return &(((struct rsnd_ssiu *)(priv->ssiu))->ssi + id)->mod;
+}
+
+int rsnd_ssi_probe(struct platform_device *pdev,
+ struct rcar_snd_info *info,
+ struct rsnd_priv *priv)
+{
+ struct rsnd_ssi_platform_info *pinfo;
+ struct device *dev = rsnd_priv_to_dev(priv);
+ struct rsnd_mod_ops *ops;
+ struct clk *clk;
+ struct rsnd_ssiu *ssiu;
+ struct rsnd_ssi *ssi;
+ char name[RSND_SSI_NAME_SIZE];
+ int i, nr, ret;
+
+ /*
+ * init SSI
+ */
+ nr = info->ssi_info_nr;
+ ssiu = devm_kzalloc(dev, sizeof(*ssiu) + (sizeof(*ssi) * nr),
+ GFP_KERNEL);
+ if (!ssiu) {
+ dev_err(dev, "SSI allocate failed\n");
+ return -ENOMEM;
+ }
+
+ priv->ssiu = ssiu;
+ ssiu->ssi = (struct rsnd_ssi *)(ssiu + 1);
+ ssiu->ssi_nr = nr;
+
+ for_each_rsnd_ssi(ssi, priv, i) {
+ pinfo = &info->ssi_info[i];
+
+ snprintf(name, RSND_SSI_NAME_SIZE, "ssi.%d", i);
+
+ clk = clk_get(dev, name);
+ if (IS_ERR(clk))
+ return PTR_ERR(clk);
+
+ ssi->info = pinfo;
+ ssi->clk = clk;
+
+ ops = &rsnd_ssi_non_ops;
+
+ /*
+ * SSI PIO case
+ */
+ if (rsnd_ssi_is_pio(ssi)) {
+ ret = devm_request_irq(dev, pinfo->pio_irq,
+ &rsnd_ssi_pio_interrupt,
+ IRQF_SHARED,
+ dev_name(dev), ssi);
+ if (ret) {
+ dev_err(dev, "SSI request interrupt failed\n");
+ return ret;
+ }
+
+ ops = &rsnd_ssi_pio_ops;
+ }
+
+ rsnd_mod_init(priv, &ssi->mod, ops, i);
+ }
+
+ rsnd_ssi_mode_init(priv, ssiu);
+
+ dev_dbg(dev, "ssi probed\n");
+
+ return 0;
+}
+
+void rsnd_ssi_remove(struct platform_device *pdev,
+ struct rsnd_priv *priv)
+{
+ struct rsnd_ssi *ssi;
+ int i;
+
+ for_each_rsnd_ssi(ssi, priv, i)
+ clk_put(ssi->clk);
+}
projects / platform / kernel / linux-rpi.git / commitdiff