diff options
Diffstat (limited to 'sound/soc/sh/rcar/ssiu.c')
-rw-r--r-- | sound/soc/sh/rcar/ssiu.c | 609 |
1 files changed, 609 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/ssiu.c b/sound/soc/sh/rcar/ssiu.c new file mode 100644 index 0000000000..17bd8cc86d --- /dev/null +++ b/sound/soc/sh/rcar/ssiu.c @@ -0,0 +1,609 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Renesas R-Car SSIU support +// +// Copyright (c) 2015 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> + +#include "rsnd.h" + +#define SSIU_NAME "ssiu" + +struct rsnd_ssiu { + struct rsnd_mod mod; + u32 busif_status[8]; /* for BUSIF0 - BUSIF7 */ + unsigned int usrcnt; + int id; + int id_sub; +}; + +/* SSI_MODE */ +#define TDM_EXT (1 << 0) +#define TDM_SPLIT (1 << 8) + +#define rsnd_ssiu_nr(priv) ((priv)->ssiu_nr) +#define rsnd_mod_to_ssiu(_mod) container_of((_mod), struct rsnd_ssiu, mod) +#define for_each_rsnd_ssiu(pos, priv, i) \ + for (i = 0; \ + (i < rsnd_ssiu_nr(priv)) && \ + ((pos) = ((struct rsnd_ssiu *)(priv)->ssiu + i)); \ + i++) + +/* + * SSI Gen2 Gen3 Gen4 + * 0 BUSIF0-3 BUSIF0-7 BUSIF0-7 + * 1 BUSIF0-3 BUSIF0-7 + * 2 BUSIF0-3 BUSIF0-7 + * 3 BUSIF0 BUSIF0-7 + * 4 BUSIF0 BUSIF0-7 + * 5 BUSIF0 BUSIF0 + * 6 BUSIF0 BUSIF0 + * 7 BUSIF0 BUSIF0 + * 8 BUSIF0 BUSIF0 + * 9 BUSIF0-3 BUSIF0-7 + * total 22 52 8 + */ +static const int gen2_id[] = { 0, 4, 8, 12, 13, 14, 15, 16, 17, 18 }; +static const int gen3_id[] = { 0, 8, 16, 24, 32, 40, 41, 42, 43, 44 }; +static const int gen4_id[] = { 0 }; + +/* enable busif buffer over/under run interrupt. */ +#define rsnd_ssiu_busif_err_irq_enable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 1) +#define rsnd_ssiu_busif_err_irq_disable(mod) rsnd_ssiu_busif_err_irq_ctrl(mod, 0) +static void rsnd_ssiu_busif_err_irq_ctrl(struct rsnd_mod *mod, int enable) +{ + int id = rsnd_mod_id(mod); + int shift, offset; + int i; + + switch (id) { + case 0: + case 1: + case 2: + case 3: + case 4: + shift = id; + offset = 0; + break; + case 9: + shift = 1; + offset = 1; + break; + default: + return; + } + + for (i = 0; i < 4; i++) { + enum rsnd_reg reg = SSI_SYS_INT_ENABLE((i * 2) + offset); + u32 val = 0xf << (shift * 4); + u32 sys_int_enable = rsnd_mod_read(mod, reg); + + if (enable) + sys_int_enable |= val; + else + sys_int_enable &= ~val; + rsnd_mod_write(mod, reg, sys_int_enable); + } +} + +bool rsnd_ssiu_busif_err_status_clear(struct rsnd_mod *mod) +{ + bool error = false; + int id = rsnd_mod_id(mod); + int shift, offset; + int i; + + switch (id) { + case 0: + case 1: + case 2: + case 3: + case 4: + shift = id; + offset = 0; + break; + case 9: + shift = 1; + offset = 1; + break; + default: + goto out; + } + + for (i = 0; i < 4; i++) { + u32 reg = SSI_SYS_STATUS(i * 2) + offset; + u32 status = rsnd_mod_read(mod, reg); + u32 val = 0xf << (shift * 4); + + status &= val; + if (status) { + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct device *dev = rsnd_priv_to_dev(priv); + + rsnd_print_irq_status(dev, "%s err status : 0x%08x\n", + rsnd_mod_name(mod), status); + error = true; + } + rsnd_mod_write(mod, reg, val); + } +out: + return error; +} + +static u32 *rsnd_ssiu_get_status(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + enum rsnd_mod_type type) +{ + struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); + int busif = rsnd_mod_id_sub(mod); + + return &ssiu->busif_status[busif]; +} + +static int rsnd_ssiu_init(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); + u32 ssis = rsnd_ssi_multi_secondaries_runtime(io); + int use_busif = rsnd_ssi_use_busif(io); + int id = rsnd_mod_id(mod); + int is_clk_master = rsnd_rdai_is_clk_master(rdai); + u32 val1, val2; + + /* clear status */ + rsnd_ssiu_busif_err_status_clear(mod); + + /* Gen4 doesn't have SSI_MODE */ + if (rsnd_is_gen4(priv)) + goto ssi_mode_setting_end; + + /* + * SSI_MODE0 + */ + rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id); + + /* + * SSI_MODE1 / SSI_MODE2 + * + * FIXME + * sharing/multi with SSI0 are mainly supported + */ + val1 = rsnd_mod_read(mod, SSI_MODE1); + val2 = rsnd_mod_read(mod, SSI_MODE2); + if (rsnd_ssi_is_pin_sharing(io)) { + + ssis |= (1 << id); + + } else if (ssis) { + /* + * Multi SSI + * + * set synchronized bit here + */ + + /* SSI4 is synchronized with SSI3 */ + if (ssis & (1 << 4)) + val1 |= (1 << 20); + /* SSI012 are synchronized */ + if (ssis == 0x0006) + val1 |= (1 << 4); + /* SSI0129 are synchronized */ + if (ssis == 0x0206) + val2 |= (1 << 4); + } + + /* SSI1 is sharing pin with SSI0 */ + if (ssis & (1 << 1)) + val1 |= is_clk_master ? 0x2 : 0x1; + + /* SSI2 is sharing pin with SSI0 */ + if (ssis & (1 << 2)) + val1 |= is_clk_master ? 0x2 << 2 : + 0x1 << 2; + /* SSI4 is sharing pin with SSI3 */ + if (ssis & (1 << 4)) + val1 |= is_clk_master ? 0x2 << 16 : + 0x1 << 16; + /* SSI9 is sharing pin with SSI0 */ + if (ssis & (1 << 9)) + val2 |= is_clk_master ? 0x2 : 0x1; + + rsnd_mod_bset(mod, SSI_MODE1, 0x0013001f, val1); + rsnd_mod_bset(mod, SSI_MODE2, 0x00000017, val2); + +ssi_mode_setting_end: + /* + * Enable busif buffer over/under run interrupt. + * It will be handled from ssi.c + * see + * __rsnd_ssi_interrupt() + */ + rsnd_ssiu_busif_err_irq_enable(mod); + + return 0; +} + +static int rsnd_ssiu_quit(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + /* disable busif buffer over/under run interrupt. */ + rsnd_ssiu_busif_err_irq_disable(mod); + + return 0; +} + +static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = { + .name = SSIU_NAME, + .init = rsnd_ssiu_init, + .quit = rsnd_ssiu_quit, + .get_status = rsnd_ssiu_get_status, +}; + +static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); + u32 has_hdmi0 = rsnd_flags_has(io, RSND_STREAM_HDMI0); + u32 has_hdmi1 = rsnd_flags_has(io, RSND_STREAM_HDMI1); + int ret; + u32 mode = 0; + + ret = rsnd_ssiu_init(mod, io, priv); + if (ret < 0) + return ret; + + ssiu->usrcnt++; + + /* + * TDM Extend/Split Mode + * see + * rsnd_ssi_config_init() + */ + if (rsnd_runtime_is_tdm(io)) + mode = TDM_EXT; + else if (rsnd_runtime_is_tdm_split(io)) + mode = TDM_SPLIT; + + rsnd_mod_write(mod, SSI_MODE, mode); + + if (rsnd_ssi_use_busif(io)) { + int id = rsnd_mod_id(mod); + int busif = rsnd_mod_id_sub(mod); + enum rsnd_reg adinr_reg, mode_reg, dalign_reg; + + if ((id == 9) && (busif >= 4)) { + adinr_reg = SSI9_BUSIF_ADINR(busif); + mode_reg = SSI9_BUSIF_MODE(busif); + dalign_reg = SSI9_BUSIF_DALIGN(busif); + } else { + adinr_reg = SSI_BUSIF_ADINR(busif); + mode_reg = SSI_BUSIF_MODE(busif); + dalign_reg = SSI_BUSIF_DALIGN(busif); + } + + rsnd_mod_write(mod, adinr_reg, + rsnd_get_adinr_bit(mod, io) | + (rsnd_io_is_play(io) ? + rsnd_runtime_channel_after_ctu(io) : + rsnd_runtime_channel_original(io))); + rsnd_mod_write(mod, mode_reg, + rsnd_get_busif_shift(io, mod) | 1); + rsnd_mod_write(mod, dalign_reg, + rsnd_get_dalign(mod, io)); + } + + if (has_hdmi0 || has_hdmi1) { + enum rsnd_mod_type rsnd_ssi_array[] = { + RSND_MOD_SSIM1, + RSND_MOD_SSIM2, + RSND_MOD_SSIM3, + }; + struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io); + struct rsnd_mod *pos; + u32 val; + int i; + + i = rsnd_mod_id(ssi_mod); + + /* output all same SSI as default */ + val = i << 16 | + i << 20 | + i << 24 | + i << 28 | + i; + + for_each_rsnd_mod_array(i, pos, io, rsnd_ssi_array) { + int shift = (i * 4) + 20; + + val = (val & ~(0xF << shift)) | + rsnd_mod_id(pos) << shift; + } + + if (has_hdmi0) + rsnd_mod_write(mod, HDMI0_SEL, val); + if (has_hdmi1) + rsnd_mod_write(mod, HDMI1_SEL, val); + } + + return 0; +} + +static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + int busif = rsnd_mod_id_sub(mod); + + if (!rsnd_ssi_use_busif(io)) + return 0; + + rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 1 << (busif * 4)); + + if (rsnd_ssi_multi_secondaries_runtime(io)) + rsnd_mod_write(mod, SSI_CONTROL, 0x1); + + return 0; +} + +static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); + int busif = rsnd_mod_id_sub(mod); + + if (!rsnd_ssi_use_busif(io)) + return 0; + + rsnd_mod_bset(mod, SSI_CTRL, 1 << (busif * 4), 0); + + if (--ssiu->usrcnt) + return 0; + + if (rsnd_ssi_multi_secondaries_runtime(io)) + rsnd_mod_write(mod, SSI_CONTROL, 0); + + return 0; +} + +static int rsnd_ssiu_id(struct rsnd_mod *mod) +{ + struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); + + /* see rsnd_ssiu_probe() */ + return ssiu->id; +} + +static int rsnd_ssiu_id_sub(struct rsnd_mod *mod) +{ + struct rsnd_ssiu *ssiu = rsnd_mod_to_ssiu(mod); + + /* see rsnd_ssiu_probe() */ + return ssiu->id_sub; +} + +static struct dma_chan *rsnd_ssiu_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; + + /* + * 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_ssi_dma_req() + * rsnd_dma_of_path() + */ + + name = is_play ? "rx" : "tx"; + + return rsnd_dma_request_channel(rsnd_ssiu_of_node(priv), + SSIU_NAME, mod, name); +} + +#ifdef CONFIG_DEBUG_FS +static void rsnd_ssiu_debug_info(struct seq_file *m, + struct rsnd_dai_stream *io, + struct rsnd_mod *mod) +{ + rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SSIU, + rsnd_mod_id(mod) * 0x80, 0x80); +} +#define DEBUG_INFO .debug_info = rsnd_ssiu_debug_info +#else +#define DEBUG_INFO +#endif + +static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = { + .name = SSIU_NAME, + .dma_req = rsnd_ssiu_dma_req, + .init = rsnd_ssiu_init_gen2, + .quit = rsnd_ssiu_quit, + .start = rsnd_ssiu_start_gen2, + .stop = rsnd_ssiu_stop_gen2, + .get_status = rsnd_ssiu_get_status, + DEBUG_INFO +}; + +static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id) +{ + if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv))) + id = 0; + + return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id); +} + +static void rsnd_parse_connect_ssiu_compatible(struct rsnd_priv *priv, + struct rsnd_dai_stream *io) +{ + struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io); + struct rsnd_ssiu *ssiu; + int is_dma_mode; + int i; + + if (!ssi_mod) + return; + + is_dma_mode = rsnd_ssi_is_dma_mode(ssi_mod); + + /* select BUSIF0 */ + for_each_rsnd_ssiu(ssiu, priv, i) { + struct rsnd_mod *mod = rsnd_mod_get(ssiu); + + if (is_dma_mode && + (rsnd_mod_id(ssi_mod) == rsnd_mod_id(mod)) && + (rsnd_mod_id_sub(mod) == 0)) { + rsnd_dai_connect(mod, io, mod->type); + return; + } + } +} + +void rsnd_parse_connect_ssiu(struct rsnd_dai *rdai, + struct device_node *playback, + struct device_node *capture) +{ + struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); + struct device *dev = rsnd_priv_to_dev(priv); + struct device_node *node = rsnd_ssiu_of_node(priv); + struct rsnd_dai_stream *io_p = &rdai->playback; + struct rsnd_dai_stream *io_c = &rdai->capture; + + /* use rcar_sound,ssiu if exist */ + if (node) { + struct device_node *np; + int i = 0; + + for_each_child_of_node(node, np) { + struct rsnd_mod *mod; + + i = rsnd_node_fixed_index(dev, np, SSIU_NAME, i); + if (i < 0) { + of_node_put(np); + break; + } + + mod = rsnd_ssiu_mod_get(priv, i); + + if (np == playback) + rsnd_dai_connect(mod, io_p, mod->type); + if (np == capture) + rsnd_dai_connect(mod, io_c, mod->type); + i++; + } + + of_node_put(node); + } + + /* Keep DT compatibility */ + if (!rsnd_io_to_mod_ssiu(io_p)) + rsnd_parse_connect_ssiu_compatible(priv, io_p); + if (!rsnd_io_to_mod_ssiu(io_c)) + rsnd_parse_connect_ssiu_compatible(priv, io_c); +} + +int rsnd_ssiu_probe(struct rsnd_priv *priv) +{ + struct device *dev = rsnd_priv_to_dev(priv); + struct device_node *node; + struct rsnd_ssiu *ssiu; + struct rsnd_mod_ops *ops; + const int *list = NULL; + int i, nr; + + /* + * Keep DT compatibility. + * if it has "rcar_sound,ssiu", use it. + * if not, use "rcar_sound,ssi" + * see + * rsnd_ssiu_bufsif_to_id() + */ + node = rsnd_ssiu_of_node(priv); + if (node) + nr = rsnd_node_count(priv, node, SSIU_NAME); + else + nr = priv->ssi_nr; + + if (!nr) + return -EINVAL; + + ssiu = devm_kcalloc(dev, nr, sizeof(*ssiu), GFP_KERNEL); + if (!ssiu) + return -ENOMEM; + + priv->ssiu = ssiu; + priv->ssiu_nr = nr; + + if (rsnd_is_gen1(priv)) + ops = &rsnd_ssiu_ops_gen1; + else + ops = &rsnd_ssiu_ops_gen2; + + /* Keep compatibility */ + nr = 0; + if ((node) && + (ops == &rsnd_ssiu_ops_gen2)) { + ops->id = rsnd_ssiu_id; + ops->id_sub = rsnd_ssiu_id_sub; + + if (rsnd_is_gen2(priv)) { + list = gen2_id; + nr = ARRAY_SIZE(gen2_id); + } else if (rsnd_is_gen3(priv)) { + list = gen3_id; + nr = ARRAY_SIZE(gen3_id); + } else if (rsnd_is_gen4(priv)) { + list = gen4_id; + nr = ARRAY_SIZE(gen4_id); + } else { + dev_err(dev, "unknown SSIU\n"); + return -ENODEV; + } + } + + for_each_rsnd_ssiu(ssiu, priv, i) { + int ret; + + if (node) { + int j; + + /* + * see + * rsnd_ssiu_get_id() + * rsnd_ssiu_get_id_sub() + */ + for (j = 0; j < nr; j++) { + if (list[j] > i) + break; + ssiu->id = j; + ssiu->id_sub = i - list[ssiu->id]; + } + } else { + ssiu->id = i; + } + + ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu), + ops, NULL, RSND_MOD_SSIU, i); + if (ret) + return ret; + } + + return 0; +} + +void rsnd_ssiu_remove(struct rsnd_priv *priv) +{ + struct rsnd_ssiu *ssiu; + int i; + + for_each_rsnd_ssiu(ssiu, priv, i) { + rsnd_mod_quit(rsnd_mod_get(ssiu)); + } +} |