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