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694 lines
19 KiB
694 lines
19 KiB
![]()
6 years ago
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From cbcb43856238e359086ac491f41d5d38b834268f Mon Sep 17 00:00:00 2001
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From: BabuSubashChandar <babuenir@gmail.com>
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Date: Tue, 28 Mar 2017 20:04:42 +0530
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Subject: [PATCH 081/454] Add support for Allo Boss DAC add-on board for
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Raspberry Pi. (#1924)
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Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net>
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Reviewed-by: Deepak <deepak@zilogic.com>
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Reviewed-by: BabuSubashChandar <babusubashchandar@zilogic.com>
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Add support for new clock rate and mute gpios.
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Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net>
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Reviewed-by: Deepak <deepak@zilogic.com>
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Reviewed-by: BabuSubashChandar <babusubashchandar@zilogic.com>
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---
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drivers/clk/Makefile | 1 +
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drivers/clk/clk-allo-dac.c | 161 ++++++++++++
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sound/soc/bcm/Kconfig | 7 +
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sound/soc/bcm/Makefile | 2 +
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sound/soc/bcm/allo-boss-dac.c | 461 ++++++++++++++++++++++++++++++++++
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5 files changed, 632 insertions(+)
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create mode 100644 drivers/clk/clk-allo-dac.c
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create mode 100644 sound/soc/bcm/allo-boss-dac.c
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--- a/drivers/clk/Makefile
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+++ b/drivers/clk/Makefile
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@@ -18,6 +18,7 @@ endif
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# hardware specific clock types
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# please keep this section sorted lexicographically by file path name
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+obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += clk-allo-dac.o
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obj-$(CONFIG_MACH_ASM9260) += clk-asm9260.o
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obj-$(CONFIG_COMMON_CLK_AXI_CLKGEN) += clk-axi-clkgen.o
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obj-$(CONFIG_ARCH_AXXIA) += clk-axm5516.o
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--- /dev/null
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+++ b/drivers/clk/clk-allo-dac.c
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@@ -0,0 +1,161 @@
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+/*
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+ * Clock Driver for Allo DAC
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+ *
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+ * Author: Baswaraj K <jaikumar@cem-solutions.net>
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+ * Copyright 2016
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+ * based on code by Stuart MacLean
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ */
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+
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+#include <linux/clk-provider.h>
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+#include <linux/clkdev.h>
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/of.h>
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+#include <linux/slab.h>
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+#include <linux/platform_device.h>
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+
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+/* Clock rate of CLK44EN attached to GPIO6 pin */
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+#define CLK_44EN_RATE 45158400UL
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+/* Clock rate of CLK48EN attached to GPIO3 pin */
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+#define CLK_48EN_RATE 49152000UL
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+
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+/**
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+ * struct allo_dac_clk - Common struct to the Allo DAC
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+ * @hw: clk_hw for the common clk framework
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+ * @mode: 0 => CLK44EN, 1 => CLK48EN
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+ */
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+struct clk_allo_hw {
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+ struct clk_hw hw;
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+ uint8_t mode;
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+};
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+
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+#define to_allo_clk(_hw) container_of(_hw, struct clk_allo_hw, hw)
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+
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+static const struct of_device_id clk_allo_dac_dt_ids[] = {
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+ { .compatible = "allo,dac-clk",},
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+ { }
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+};
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+MODULE_DEVICE_TABLE(of, clk_allo_dac_dt_ids);
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+
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+static unsigned long clk_allo_dac_recalc_rate(struct clk_hw *hw,
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+ unsigned long parent_rate)
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+{
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+ return (to_allo_clk(hw)->mode == 0) ? CLK_44EN_RATE :
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+ CLK_48EN_RATE;
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+}
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+
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+static long clk_allo_dac_round_rate(struct clk_hw *hw,
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+ unsigned long rate, unsigned long *parent_rate)
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+{
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+ long actual_rate;
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+
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+ if (rate <= CLK_44EN_RATE) {
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+ actual_rate = (long)CLK_44EN_RATE;
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+ } else if (rate >= CLK_48EN_RATE) {
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+ actual_rate = (long)CLK_48EN_RATE;
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+ } else {
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+ long diff44Rate = (long)(rate - CLK_44EN_RATE);
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+ long diff48Rate = (long)(CLK_48EN_RATE - rate);
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+
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+ if (diff44Rate < diff48Rate)
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+ actual_rate = (long)CLK_44EN_RATE;
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+ else
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+ actual_rate = (long)CLK_48EN_RATE;
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+ }
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+ return actual_rate;
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+}
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+
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+
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+static int clk_allo_dac_set_rate(struct clk_hw *hw,
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+ unsigned long rate, unsigned long parent_rate)
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+{
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+ unsigned long actual_rate;
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+ struct clk_allo_hw *clk = to_allo_clk(hw);
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+
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+ actual_rate = (unsigned long)clk_allo_dac_round_rate(hw, rate,
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+ &parent_rate);
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+ clk->mode = (actual_rate == CLK_44EN_RATE) ? 0 : 1;
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+ return 0;
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+}
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+
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+
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+const struct clk_ops clk_allo_dac_rate_ops = {
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+ .recalc_rate = clk_allo_dac_recalc_rate,
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+ .round_rate = clk_allo_dac_round_rate,
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+ .set_rate = clk_allo_dac_set_rate,
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+};
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+
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+static int clk_allo_dac_probe(struct platform_device *pdev)
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+{
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+ int ret;
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+ struct clk_allo_hw *proclk;
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+ struct clk *clk;
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+ struct device *dev;
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+ struct clk_init_data init;
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+
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+ dev = &pdev->dev;
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+
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+ proclk = kzalloc(sizeof(struct clk_allo_hw), GFP_KERNEL);
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+ if (!proclk)
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+ return -ENOMEM;
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+
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+ init.name = "clk-allo-dac";
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+ init.ops = &clk_allo_dac_rate_ops;
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+ init.flags = CLK_IS_BASIC;
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+ init.parent_names = NULL;
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+ init.num_parents = 0;
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+
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+ proclk->mode = 0;
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+ proclk->hw.init = &init;
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+
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+ clk = devm_clk_register(dev, &proclk->hw);
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+ if (!IS_ERR(clk)) {
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+ ret = of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
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+ clk);
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+ } else {
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+ dev_err(dev, "Fail to register clock driver\n");
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+ kfree(proclk);
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+ ret = PTR_ERR(clk);
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+ }
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+ return ret;
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+}
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+
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+static int clk_allo_dac_remove(struct platform_device *pdev)
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+{
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+ of_clk_del_provider(pdev->dev.of_node);
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+ return 0;
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+}
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+
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+static struct platform_driver clk_allo_dac_driver = {
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+ .probe = clk_allo_dac_probe,
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+ .remove = clk_allo_dac_remove,
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+ .driver = {
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+ .name = "clk-allo-dac",
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+ .of_match_table = clk_allo_dac_dt_ids,
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+ },
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+};
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+
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+static int __init clk_allo_dac_init(void)
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+{
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+ return platform_driver_register(&clk_allo_dac_driver);
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+}
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+core_initcall(clk_allo_dac_init);
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+
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+static void __exit clk_allo_dac_exit(void)
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+{
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+ platform_driver_unregister(&clk_allo_dac_driver);
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+}
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+module_exit(clk_allo_dac_exit);
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+
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+MODULE_DESCRIPTION("Allo DAC clock driver");
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+MODULE_LICENSE("GPL v2");
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+MODULE_ALIAS("platform:clk-allo-dac");
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--- a/sound/soc/bcm/Kconfig
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+++ b/sound/soc/bcm/Kconfig
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@@ -138,3 +138,10 @@ config SND_BCM2708_SOC_ALLO_PIANO_DAC_PL
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select SND_SOC_PCM512x_I2C
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help
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Say Y or M if you want to add support for Allo Piano DAC Plus.
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+
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+config SND_BCM2708_SOC_ALLO_BOSS_DAC
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+ tristate "Support for Allo Boss DAC"
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+ depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
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+ select SND_SOC_PCM512x_I2C
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+ help
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+ Say Y or M if you want to add support for Allo Boss DAC.
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--- a/sound/soc/bcm/Makefile
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+++ b/sound/soc/bcm/Makefile
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@@ -24,6 +24,7 @@ snd-soc-raspidac3-objs := raspidac3.o
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snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
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snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o
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snd-soc-dionaudio-loco-objs := dionaudio_loco.o
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+snd-soc-allo-boss-dac-objs := allo-boss-dac.o
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snd-soc-allo-piano-dac-objs := allo-piano-dac.o
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snd-soc-allo-piano-dac-plus-objs := allo-piano-dac-plus.o
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@@ -42,5 +43,6 @@ obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3)
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obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
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obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
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obj-$(CONFIG_SND_BCM2708_SOC_DIONAUDIO_LOCO) += snd-soc-dionaudio-loco.o
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+obj-$(CONFIG_SND_BCM2708_SOC_ALLO_BOSS_DAC) += snd-soc-allo-boss-dac.o
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obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC) += snd-soc-allo-piano-dac.o
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obj-$(CONFIG_SND_BCM2708_SOC_ALLO_PIANO_DAC_PLUS) += snd-soc-allo-piano-dac-plus.o
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--- /dev/null
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+++ b/sound/soc/bcm/allo-boss-dac.c
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@@ -0,0 +1,461 @@
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+/*
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+ * ALSA ASoC Machine Driver for Allo Boss DAC
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+ *
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+ * Author: Baswaraj K <jaikumar@cem-solutions.net>
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+ * Copyright 2017
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+ * based on code by Daniel Matuschek,
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+ * Stuart MacLean <stuart@hifiberry.com>
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+ * based on code by Florian Meier <florian.meier@koalo.de>
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * version 2 as published by the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/gpio/consumer.h>
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+#include <linux/platform_device.h>
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+#include <linux/clk.h>
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+#include <linux/delay.h>
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+
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+#include <sound/core.h>
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+#include <sound/pcm.h>
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+#include <sound/pcm_params.h>
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+#include <sound/soc.h>
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+#include "../codecs/pcm512x.h"
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+
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+#define ALLO_BOSS_NOCLOCK 0
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+#define ALLO_BOSS_CLK44EN 1
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+#define ALLO_BOSS_CLK48EN 2
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+
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+struct pcm512x_priv {
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+ struct regmap *regmap;
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+ struct clk *sclk;
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+};
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+
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+static struct gpio_desc *mute_gpio;
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+
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+/* Clock rate of CLK44EN attached to GPIO6 pin */
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+#define CLK_44EN_RATE 45158400UL
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+/* Clock rate of CLK48EN attached to GPIO3 pin */
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+#define CLK_48EN_RATE 49152000UL
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+
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+static bool slave;
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+static bool snd_soc_allo_boss_master;
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+static bool digital_gain_0db_limit = true;
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+
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+static void snd_allo_boss_select_clk(struct snd_soc_codec *codec,
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+ int clk_id)
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+{
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+ switch (clk_id) {
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+ case ALLO_BOSS_NOCLOCK:
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+ snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x24, 0x00);
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+ break;
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+ case ALLO_BOSS_CLK44EN:
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+ snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x24, 0x20);
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+ break;
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+ case ALLO_BOSS_CLK48EN:
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+ snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x24, 0x04);
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+ break;
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+ }
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+}
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+
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+static void snd_allo_boss_clk_gpio(struct snd_soc_codec *codec)
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+{
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+ snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x24, 0x24);
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+ snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_3, 0x0f, 0x02);
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+ snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_6, 0x0f, 0x02);
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+}
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+
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+static bool snd_allo_boss_is_sclk(struct snd_soc_codec *codec)
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+{
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+ int sck;
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+
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+ sck = snd_soc_read(codec, PCM512x_RATE_DET_4);
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+ return (!(sck & 0x40));
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+}
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+
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+static bool snd_allo_boss_is_sclk_sleep(
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+ struct snd_soc_codec *codec)
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+{
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+ msleep(2);
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+ return snd_allo_boss_is_sclk(codec);
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+}
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+
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+static bool snd_allo_boss_is_master_card(struct snd_soc_codec *codec)
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+{
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+ bool isClk44EN, isClk48En, isNoClk;
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+
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+ snd_allo_boss_clk_gpio(codec);
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+
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+ snd_allo_boss_select_clk(codec, ALLO_BOSS_CLK44EN);
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+ isClk44EN = snd_allo_boss_is_sclk_sleep(codec);
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+
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+ snd_allo_boss_select_clk(codec, ALLO_BOSS_NOCLOCK);
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+ isNoClk = snd_allo_boss_is_sclk_sleep(codec);
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+
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+ snd_allo_boss_select_clk(codec, ALLO_BOSS_CLK48EN);
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+ isClk48En = snd_allo_boss_is_sclk_sleep(codec);
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+
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+ return (isClk44EN && isClk48En && !isNoClk);
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+}
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+
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+static int snd_allo_boss_clk_for_rate(int sample_rate)
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+{
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+ int type;
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+
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+ switch (sample_rate) {
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+ case 11025:
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+ case 22050:
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+ case 44100:
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+ case 88200:
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+ case 176400:
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+ case 352800:
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+ type = ALLO_BOSS_CLK44EN;
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+ break;
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+ default:
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+ type = ALLO_BOSS_CLK48EN;
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+ break;
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+ }
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+ return type;
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+}
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+
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+static void snd_allo_boss_set_sclk(struct snd_soc_codec *codec,
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+ int sample_rate)
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+{
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+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
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+
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+ if (!IS_ERR(pcm512x->sclk)) {
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+ int ctype;
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+
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+ ctype = snd_allo_boss_clk_for_rate(sample_rate);
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+ clk_set_rate(pcm512x->sclk, (ctype == ALLO_BOSS_CLK44EN)
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+ ? CLK_44EN_RATE : CLK_48EN_RATE);
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||
|
+ snd_allo_boss_select_clk(codec, ctype);
|
||
|
+ }
|
||
|
+}
|
||
|
+
|
||
|
+static int snd_allo_boss_init(struct snd_soc_pcm_runtime *rtd)
|
||
|
+{
|
||
|
+ struct snd_soc_codec *codec = rtd->codec;
|
||
|
+ struct pcm512x_priv *priv = snd_soc_codec_get_drvdata(codec);
|
||
|
+
|
||
|
+ if (slave)
|
||
|
+ snd_soc_allo_boss_master = false;
|
||
|
+ else
|
||
|
+ snd_soc_allo_boss_master =
|
||
|
+ snd_allo_boss_is_master_card(codec);
|
||
|
+
|
||
|
+ if (snd_soc_allo_boss_master) {
|
||
|
+ struct snd_soc_dai_link *dai = rtd->dai_link;
|
||
|
+
|
||
|
+ dai->name = "BossDAC";
|
||
|
+ dai->stream_name = "Boss DAC HiFi [Master]";
|
||
|
+ dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
|
||
|
+ | SND_SOC_DAIFMT_CBM_CFM;
|
||
|
+
|
||
|
+ snd_soc_update_bits(codec, PCM512x_BCLK_LRCLK_CFG, 0x31, 0x11);
|
||
|
+ snd_soc_update_bits(codec, PCM512x_MASTER_MODE, 0x03, 0x03);
|
||
|
+ snd_soc_update_bits(codec, PCM512x_MASTER_CLKDIV_2, 0x7f, 63);
|
||
|
+ /*
|
||
|
+ * Default sclk to CLK_48EN_RATE, otherwise codec
|
||
|
+ * pcm512x_dai_startup_master method could call
|
||
|
+ * snd_pcm_hw_constraint_ratnums using CLK_44EN/64
|
||
|
+ * which will mask 384k sample rate.
|
||
|
+ */
|
||
|
+ if (!IS_ERR(priv->sclk))
|
||
|
+ clk_set_rate(priv->sclk, CLK_48EN_RATE);
|
||
|
+ } else {
|
||
|
+ priv->sclk = ERR_PTR(-ENOENT);
|
||
|
+ }
|
||
|
+
|
||
|
+ snd_soc_update_bits(codec, PCM512x_GPIO_EN, 0x08, 0x08);
|
||
|
+ snd_soc_update_bits(codec, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
|
||
|
+ snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
|
||
|
+
|
||
|
+ if (digital_gain_0db_limit) {
|
||
|
+ int ret;
|
||
|
+ struct snd_soc_card *card = rtd->card;
|
||
|
+
|
||
|
+ ret = snd_soc_limit_volume(card, "Digital Playback Volume",
|
||
|
+ 207);
|
||
|
+ if (ret < 0)
|
||
|
+ dev_warn(card->dev, "Failed to set volume limit: %d\n",
|
||
|
+ ret);
|
||
|
+ }
|
||
|
+
|
||
|
+ return 0;
|
||
|
+}
|
||
|
+
|
||
|
+static int snd_allo_boss_update_rate_den(
|
||
|
+ struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
|
||
|
+{
|
||
|
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||
|
+ struct snd_soc_codec *codec = rtd->codec;
|
||
|
+ struct pcm512x_priv *pcm512x = snd_soc_codec_get_drvdata(codec);
|
||
|
+ struct snd_ratnum *rats_no_pll;
|
||
|
+ unsigned int num = 0, den = 0;
|
||
|
+ int err;
|
||
|
+
|
||
|
+ rats_no_pll = devm_kzalloc(rtd->dev, sizeof(*rats_no_pll), GFP_KERNEL);
|
||
|
+ if (!rats_no_pll)
|
||
|
+ return -ENOMEM;
|
||
|
+
|
||
|
+ rats_no_pll->num = clk_get_rate(pcm512x->sclk) / 64;
|
||
|
+ rats_no_pll->den_min = 1;
|
||
|
+ rats_no_pll->den_max = 128;
|
||
|
+ rats_no_pll->den_step = 1;
|
||
|
+
|
||
|
+ err = snd_interval_ratnum(hw_param_interval(params,
|
||
|
+ SNDRV_PCM_HW_PARAM_RATE), 1, rats_no_pll, &num, &den);
|
||
|
+ if (err >= 0 && den) {
|
||
|
+ params->rate_num = num;
|
||
|
+ params->rate_den = den;
|
||
|
+ }
|
||
|
+
|
||
|
+ devm_kfree(rtd->dev, rats_no_pll);
|
||
|
+ return 0;
|
||
|
+}
|
||
|
+
|
||
|
+static int snd_allo_boss_set_bclk_ratio_pro(
|
||
|
+ struct snd_soc_dai *cpu_dai, struct snd_pcm_hw_params *params)
|
||
|
+{
|
||
|
+ int bratio = snd_pcm_format_physical_width(params_format(params))
|
||
|
+ * params_channels(params);
|
||
|
+ return snd_soc_dai_set_bclk_ratio(cpu_dai, bratio);
|
||
|
+}
|
||
|
+
|
||
|
+static void snd_allo_boss_gpio_mute(struct snd_soc_card *card)
|
||
|
+{
|
||
|
+ if (mute_gpio)
|
||
|
+ gpiod_set_value_cansleep(mute_gpio, 1);
|
||
|
+}
|
||
|
+
|
||
|
+static void snd_allo_boss_gpio_unmute(struct snd_soc_card *card)
|
||
|
+{
|
||
|
+ if (mute_gpio)
|
||
|
+ gpiod_set_value_cansleep(mute_gpio, 0);
|
||
|
+}
|
||
|
+
|
||
|
+static int snd_allo_boss_set_bias_level(struct snd_soc_card *card,
|
||
|
+ struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level)
|
||
|
+{
|
||
|
+ struct snd_soc_pcm_runtime *rtd;
|
||
|
+ struct snd_soc_dai *codec_dai;
|
||
|
+
|
||
|
+ rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
|
||
|
+ codec_dai = rtd->codec_dai;
|
||
|
+
|
||
|
+ if (dapm->dev != codec_dai->dev)
|
||
|
+ return 0;
|
||
|
+
|
||
|
+ switch (level) {
|
||
|
+ case SND_SOC_BIAS_PREPARE:
|
||
|
+ if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
|
||
|
+ break;
|
||
|
+ /* UNMUTE DAC */
|
||
|
+ snd_allo_boss_gpio_unmute(card);
|
||
|
+ break;
|
||
|
+
|
||
|
+ case SND_SOC_BIAS_STANDBY:
|
||
|
+ if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
|
||
|
+ break;
|
||
|
+ /* MUTE DAC */
|
||
|
+ snd_allo_boss_gpio_mute(card);
|
||
|
+ break;
|
||
|
+
|
||
|
+ default:
|
||
|
+ break;
|
||
|
+ }
|
||
|
+
|
||
|
+ return 0;
|
||
|
+}
|
||
|
+
|
||
|
+static int snd_allo_boss_hw_params(
|
||
|
+ struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params)
|
||
|
+{
|
||
|
+ int ret = 0;
|
||
|
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||
|
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
|
||
|
+ unsigned int sample_bits =
|
||
|
+ snd_pcm_format_physical_width(params_format(params));
|
||
|
+
|
||
|
+ if (snd_soc_allo_boss_master) {
|
||
|
+ struct snd_soc_codec *codec = rtd->codec;
|
||
|
+
|
||
|
+ snd_allo_boss_set_sclk(codec,
|
||
|
+ params_rate(params));
|
||
|
+
|
||
|
+ ret = snd_allo_boss_set_bclk_ratio_pro(cpu_dai,
|
||
|
+ params);
|
||
|
+ if (!ret)
|
||
|
+ ret = snd_allo_boss_update_rate_den(
|
||
|
+ substream, params);
|
||
|
+ } else {
|
||
|
+ ret = snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
|
||
|
+ }
|
||
|
+ return ret;
|
||
|
+}
|
||
|
+
|
||
|
+static int snd_allo_boss_startup(
|
||
|
+ struct snd_pcm_substream *substream)
|
||
|
+{
|
||
|
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||
|
+ struct snd_soc_codec *codec = rtd->codec;
|
||
|
+ struct snd_soc_card *card = rtd->card;
|
||
|
+
|
||
|
+ snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
|
||
|
+ snd_allo_boss_gpio_mute(card);
|
||
|
+
|
||
|
+ if (snd_soc_allo_boss_master) {
|
||
|
+ struct pcm512x_priv *priv = snd_soc_codec_get_drvdata(codec);
|
||
|
+ /*
|
||
|
+ * Default sclk to CLK_48EN_RATE, otherwise codec
|
||
|
+ * pcm512x_dai_startup_master method could call
|
||
|
+ * snd_pcm_hw_constraint_ratnums using CLK_44EN/64
|
||
|
+ * which will mask 384k sample rate.
|
||
|
+ */
|
||
|
+ if (!IS_ERR(priv->sclk))
|
||
|
+ clk_set_rate(priv->sclk, CLK_48EN_RATE);
|
||
|
+ }
|
||
|
+
|
||
|
+ return 0;
|
||
|
+}
|
||
|
+
|
||
|
+static void snd_allo_boss_shutdown(
|
||
|
+ struct snd_pcm_substream *substream)
|
||
|
+{
|
||
|
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||
|
+ struct snd_soc_codec *codec = rtd->codec;
|
||
|
+
|
||
|
+ snd_soc_update_bits(codec, PCM512x_GPIO_CONTROL_1, 0x08, 0x00);
|
||
|
+}
|
||
|
+
|
||
|
+static int snd_allo_boss_prepare(
|
||
|
+ struct snd_pcm_substream *substream)
|
||
|
+{
|
||
|
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
||
|
+ struct snd_soc_card *card = rtd->card;
|
||
|
+
|
||
|
+ snd_allo_boss_gpio_unmute(card);
|
||
|
+ return 0;
|
||
|
+}
|
||
|
+/* machine stream operations */
|
||
|
+static struct snd_soc_ops snd_allo_boss_ops = {
|
||
|
+ .hw_params = snd_allo_boss_hw_params,
|
||
|
+ .startup = snd_allo_boss_startup,
|
||
|
+ .shutdown = snd_allo_boss_shutdown,
|
||
|
+ .prepare = snd_allo_boss_prepare,
|
||
|
+};
|
||
|
+
|
||
|
+static struct snd_soc_dai_link snd_allo_boss_dai[] = {
|
||
|
+{
|
||
|
+ .name = "Boss DAC",
|
||
|
+ .stream_name = "Boss DAC HiFi",
|
||
|
+ .cpu_dai_name = "bcm2708-i2s.0",
|
||
|
+ .codec_dai_name = "pcm512x-hifi",
|
||
|
+ .platform_name = "bcm2708-i2s.0",
|
||
|
+ .codec_name = "pcm512x.1-004d",
|
||
|
+ .dai_fmt = SND_SOC_DAIFMT_I2S |
|
||
|
+ SND_SOC_DAIFMT_NB_NF |
|
||
|
+ SND_SOC_DAIFMT_CBS_CFS,
|
||
|
+ .ops = &snd_allo_boss_ops,
|
||
|
+ .init = snd_allo_boss_init,
|
||
|
+},
|
||
|
+};
|
||
|
+
|
||
|
+/* audio machine driver */
|
||
|
+static struct snd_soc_card snd_allo_boss = {
|
||
|
+ .name = "BossDAC",
|
||
|
+ .owner = THIS_MODULE,
|
||
|
+ .dai_link = snd_allo_boss_dai,
|
||
|
+ .num_links = ARRAY_SIZE(snd_allo_boss_dai),
|
||
|
+};
|
||
|
+
|
||
|
+static int snd_allo_boss_probe(struct platform_device *pdev)
|
||
|
+{
|
||
|
+ int ret = 0;
|
||
|
+
|
||
|
+ snd_allo_boss.dev = &pdev->dev;
|
||
|
+
|
||
|
+ if (pdev->dev.of_node) {
|
||
|
+ struct device_node *i2s_node;
|
||
|
+ struct snd_soc_dai_link *dai;
|
||
|
+
|
||
|
+ dai = &snd_allo_boss_dai[0];
|
||
|
+ i2s_node = of_parse_phandle(pdev->dev.of_node,
|
||
|
+ "i2s-controller", 0);
|
||
|
+
|
||
|
+ if (i2s_node) {
|
||
|
+ dai->cpu_dai_name = NULL;
|
||
|
+ dai->cpu_of_node = i2s_node;
|
||
|
+ dai->platform_name = NULL;
|
||
|
+ dai->platform_of_node = i2s_node;
|
||
|
+ }
|
||
|
+
|
||
|
+ digital_gain_0db_limit = !of_property_read_bool(
|
||
|
+ pdev->dev.of_node, "allo,24db_digital_gain");
|
||
|
+ slave = of_property_read_bool(pdev->dev.of_node,
|
||
|
+ "allo,slave");
|
||
|
+
|
||
|
+ mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute",
|
||
|
+ GPIOD_OUT_LOW);
|
||
|
+ if (IS_ERR(mute_gpio)) {
|
||
|
+ ret = PTR_ERR(mute_gpio);
|
||
|
+ dev_err(&pdev->dev,
|
||
|
+ "failed to get mute gpio: %d\n", ret);
|
||
|
+ return ret;
|
||
|
+ }
|
||
|
+
|
||
|
+ if (mute_gpio)
|
||
|
+ snd_allo_boss.set_bias_level =
|
||
|
+ snd_allo_boss_set_bias_level;
|
||
|
+
|
||
|
+ ret = snd_soc_register_card(&snd_allo_boss);
|
||
|
+ if (ret) {
|
||
|
+ dev_err(&pdev->dev,
|
||
|
+ "snd_soc_register_card() failed: %d\n", ret);
|
||
|
+ return ret;
|
||
|
+ }
|
||
|
+
|
||
|
+ if (mute_gpio)
|
||
|
+ snd_allo_boss_gpio_mute(&snd_allo_boss);
|
||
|
+
|
||
|
+ return 0;
|
||
|
+ }
|
||
|
+
|
||
|
+ return -EINVAL;
|
||
|
+}
|
||
|
+
|
||
|
+static int snd_allo_boss_remove(struct platform_device *pdev)
|
||
|
+{
|
||
|
+ snd_allo_boss_gpio_mute(&snd_allo_boss);
|
||
|
+ return snd_soc_unregister_card(&snd_allo_boss);
|
||
|
+}
|
||
|
+
|
||
|
+static const struct of_device_id snd_allo_boss_of_match[] = {
|
||
|
+ { .compatible = "allo,boss-dac", },
|
||
|
+ { /* sentinel */ },
|
||
|
+};
|
||
|
+MODULE_DEVICE_TABLE(of, snd_allo_boss_of_match);
|
||
|
+
|
||
|
+static struct platform_driver snd_allo_boss_driver = {
|
||
|
+ .driver = {
|
||
|
+ .name = "snd-allo-boss-dac",
|
||
|
+ .owner = THIS_MODULE,
|
||
|
+ .of_match_table = snd_allo_boss_of_match,
|
||
|
+ },
|
||
|
+ .probe = snd_allo_boss_probe,
|
||
|
+ .remove = snd_allo_boss_remove,
|
||
|
+};
|
||
|
+
|
||
|
+module_platform_driver(snd_allo_boss_driver);
|
||
|
+
|
||
|
+MODULE_AUTHOR("Baswaraj K <jaikumar@cem-solutions.net>");
|
||
|
+MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Boss DAC");
|
||
|
+MODULE_LICENSE("GPL v2");
|