//
// Hardware interface for audio DSP on i.MX8M
+#include <linux/bits.h>
#include <linux/firmware.h>
+#include <linux/mfd/syscon.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <linux/regmap.h>
#include <linux/module.h>
#include <sound/sof.h>
{ .id = "core" },
};
+/* DSP audio mix registers */
+#define AudioDSP_REG0 0x100
+#define AudioDSP_REG1 0x104
+#define AudioDSP_REG2 0x108
+#define AudioDSP_REG3 0x10c
+
+#define AudioDSP_REG2_RUNSTALL BIT(5)
+
struct imx8m_priv {
struct device *dev;
struct snd_sof_dev *sdev;
struct platform_device *ipc_dev;
struct imx_clocks *clks;
+
+ struct regmap *regmap;
};
static int imx8m_get_mailbox_offset(struct snd_sof_dev *sdev)
*/
static int imx8m_run(struct snd_sof_dev *sdev)
{
- /* TODO: start DSP using Audio MIX bits */
+ struct imx8m_priv *priv = (struct imx8m_priv *)sdev->pdata->hw_pdata;
+
+ regmap_update_bits(priv->regmap, AudioDSP_REG2, AudioDSP_REG2_RUNSTALL, 0);
+
return 0;
}
/* set default mailbox offset for FW ready message */
sdev->dsp_box.offset = MBOX_OFFSET;
+ priv->regmap = syscon_regmap_lookup_by_compatible("fsl,dsp-ctrl");
+ if (IS_ERR(priv->regmap)) {
+ dev_err(sdev->dev, "cannot find dsp-ctrl registers");
+ ret = PTR_ERR(priv->regmap);
+ goto exit_pdev_unregister;
+ }
+
/* init clocks info */
priv->clks->dsp_clks = imx8m_dsp_clks;
priv->clks->num_dsp_clks = ARRAY_SIZE(imx8m_dsp_clks);