| // 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 |
| * 0 BUSIF0-3 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 |
| */ |
| 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 }; |
| |
| /* 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); |
| |
| /* |
| * 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); |
| |
| /* |
| * 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 { |
| 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)); |
| } |
| } |