1 files changed, 324 insertions, 0 deletions
diff --git a/sound/soc/ti/omap-mcbsp-priv.h b/sound/soc/ti/omap-mcbsp-priv.h
new file mode 100644
index 000000000000..7865cda4bf0a
--- /dev/null
+++ b/sound/soc/ti/omap-mcbsp-priv.h
@@ -0,0 +1,324 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * OMAP Multi-Channel Buffered Serial Port
+ *
+ * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
+ *          Peter Ujfalusi <peter.ujfalusi@ti.com>
+ */
+
+#ifndef __OMAP_MCBSP_PRIV_H__
+#define __OMAP_MCBSP_PRIV_H__
+
+#include <linux/platform_data/asoc-ti-mcbsp.h>
+
+#ifdef CONFIG_ARCH_OMAP1
+#define mcbsp_omap1()	1
+#else
+#define mcbsp_omap1()	0
+#endif
+
+/* McBSP register numbers. Register address offset = num * reg_step */
+enum {
+	/* Common registers */
+	OMAP_MCBSP_REG_SPCR2 = 4,
+	OMAP_MCBSP_REG_SPCR1,
+	OMAP_MCBSP_REG_RCR2,
+	OMAP_MCBSP_REG_RCR1,
+	OMAP_MCBSP_REG_XCR2,
+	OMAP_MCBSP_REG_XCR1,
+	OMAP_MCBSP_REG_SRGR2,
+	OMAP_MCBSP_REG_SRGR1,
+	OMAP_MCBSP_REG_MCR2,
+	OMAP_MCBSP_REG_MCR1,
+	OMAP_MCBSP_REG_RCERA,
+	OMAP_MCBSP_REG_RCERB,
+	OMAP_MCBSP_REG_XCERA,
+	OMAP_MCBSP_REG_XCERB,
+	OMAP_MCBSP_REG_PCR0,
+	OMAP_MCBSP_REG_RCERC,
+	OMAP_MCBSP_REG_RCERD,
+	OMAP_MCBSP_REG_XCERC,
+	OMAP_MCBSP_REG_XCERD,
+	OMAP_MCBSP_REG_RCERE,
+	OMAP_MCBSP_REG_RCERF,
+	OMAP_MCBSP_REG_XCERE,
+	OMAP_MCBSP_REG_XCERF,
+	OMAP_MCBSP_REG_RCERG,
+	OMAP_MCBSP_REG_RCERH,
+	OMAP_MCBSP_REG_XCERG,
+	OMAP_MCBSP_REG_XCERH,
+
+	/* OMAP1-OMAP2420 registers */
+	OMAP_MCBSP_REG_DRR2 = 0,
+	OMAP_MCBSP_REG_DRR1,
+	OMAP_MCBSP_REG_DXR2,
+	OMAP_MCBSP_REG_DXR1,
+
+	/* OMAP2430 and onwards */
+	OMAP_MCBSP_REG_DRR = 0,
+	OMAP_MCBSP_REG_DXR = 2,
+	OMAP_MCBSP_REG_SYSCON =	35,
+	OMAP_MCBSP_REG_THRSH2,
+	OMAP_MCBSP_REG_THRSH1,
+	OMAP_MCBSP_REG_IRQST = 40,
+	OMAP_MCBSP_REG_IRQEN,
+	OMAP_MCBSP_REG_WAKEUPEN,
+	OMAP_MCBSP_REG_XCCR,
+	OMAP_MCBSP_REG_RCCR,
+	OMAP_MCBSP_REG_XBUFFSTAT,
+	OMAP_MCBSP_REG_RBUFFSTAT,
+	OMAP_MCBSP_REG_SSELCR,
+};
+
+/************************** McBSP SPCR1 bit definitions ***********************/
+#define RRST			BIT(0)
+#define RRDY			BIT(1)
+#define RFULL			BIT(2)
+#define RSYNC_ERR		BIT(3)
+#define RINTM(value)		(((value) & 0x3) << 4)	/* bits 4:5 */
+#define ABIS			BIT(6)
+#define DXENA			BIT(7)
+#define CLKSTP(value)		(((value) & 0x3) << 11)	/* bits 11:12 */
+#define RJUST(value)		(((value) & 0x3) << 13)	/* bits 13:14 */
+#define ALB			BIT(15)
+#define DLB			BIT(15)
+
+/************************** McBSP SPCR2 bit definitions ***********************/
+#define XRST			BIT(0)
+#define XRDY			BIT(1)
+#define XEMPTY			BIT(2)
+#define XSYNC_ERR		BIT(3)
+#define XINTM(value)		(((value) & 0x3) << 4)	/* bits 4:5 */
+#define GRST			BIT(6)
+#define FRST			BIT(7)
+#define SOFT			BIT(8)
+#define FREE			BIT(9)
+
+/************************** McBSP PCR bit definitions *************************/
+#define CLKRP			BIT(0)
+#define CLKXP			BIT(1)
+#define FSRP			BIT(2)
+#define FSXP			BIT(3)
+#define DR_STAT			BIT(4)
+#define DX_STAT			BIT(5)
+#define CLKS_STAT		BIT(6)
+#define SCLKME			BIT(7)
+#define CLKRM			BIT(8)
+#define CLKXM			BIT(9)
+#define FSRM			BIT(10)
+#define FSXM			BIT(11)
+#define RIOEN			BIT(12)
+#define XIOEN			BIT(13)
+#define IDLE_EN			BIT(14)
+
+/************************** McBSP RCR1 bit definitions ************************/
+#define RWDLEN1(value)		(((value) & 0x7) << 5)	/* Bits 5:7 */
+#define RFRLEN1(value)		(((value) & 0x7f) << 8)	/* Bits 8:14 */
+
+/************************** McBSP XCR1 bit definitions ************************/
+#define XWDLEN1(value)		(((value) & 0x7) << 5)	/* Bits 5:7 */
+#define XFRLEN1(value)		(((value) & 0x7f) << 8)	/* Bits 8:14 */
+
+/*************************** McBSP RCR2 bit definitions ***********************/
+#define RDATDLY(value)		((value) & 0x3)		/* Bits 0:1 */
+#define RFIG			BIT(2)
+#define RCOMPAND(value)		(((value) & 0x3) << 3)	/* Bits 3:4 */
+#define RWDLEN2(value)		(((value) & 0x7) << 5)	/* Bits 5:7 */
+#define RFRLEN2(value)		(((value) & 0x7f) << 8)	/* Bits 8:14 */
+#define RPHASE			BIT(15)
+
+/*************************** McBSP XCR2 bit definitions ***********************/
+#define XDATDLY(value)		((value) & 0x3)		/* Bits 0:1 */
+#define XFIG			BIT(2)
+#define XCOMPAND(value)		(((value) & 0x3) << 3)	/* Bits 3:4 */
+#define XWDLEN2(value)		(((value) & 0x7) << 5)	/* Bits 5:7 */
+#define XFRLEN2(value)		(((value) & 0x7f) << 8)	/* Bits 8:14 */
+#define XPHASE			BIT(15)
+
+/************************* McBSP SRGR1 bit definitions ************************/
+#define CLKGDV(value)		((value) & 0x7f)		/* Bits 0:7 */
+#define FWID(value)		(((value) & 0xff) << 8)	/* Bits 8:15 */
+
+/************************* McBSP SRGR2 bit definitions ************************/
+#define FPER(value)		((value) & 0x0fff)	/* Bits 0:11 */
+#define FSGM			BIT(12)
+#define CLKSM			BIT(13)
+#define CLKSP			BIT(14)
+#define GSYNC			BIT(15)
+
+/************************* McBSP MCR1 bit definitions *************************/
+#define RMCM			BIT(0)
+#define RCBLK(value)		(((value) & 0x7) << 2)	/* Bits 2:4 */
+#define RPABLK(value)		(((value) & 0x3) << 5)	/* Bits 5:6 */
+#define RPBBLK(value)		(((value) & 0x3) << 7)	/* Bits 7:8 */
+
+/************************* McBSP MCR2 bit definitions *************************/
+#define XMCM(value)		((value) & 0x3)		/* Bits 0:1 */
+#define XCBLK(value)		(((value) & 0x7) << 2)	/* Bits 2:4 */
+#define XPABLK(value)		(((value) & 0x3) << 5)	/* Bits 5:6 */
+#define XPBBLK(value)		(((value) & 0x3) << 7)	/* Bits 7:8 */
+
+/*********************** McBSP XCCR bit definitions *************************/
+#define XDISABLE		BIT(0)
+#define XDMAEN			BIT(3)
+#define DILB			BIT(5)
+#define XFULL_CYCLE		BIT(11)
+#define DXENDLY(value)		(((value) & 0x3) << 12)	/* Bits 12:13 */
+#define PPCONNECT		BIT(14)
+#define EXTCLKGATE		BIT(15)
+
+/********************** McBSP RCCR bit definitions *************************/
+#define RDISABLE		BIT(0)
+#define RDMAEN			BIT(3)
+#define RFULL_CYCLE		BIT(11)
+
+/********************** McBSP SYSCONFIG bit definitions ********************/
+#define SOFTRST			BIT(1)
+#define ENAWAKEUP		BIT(2)
+#define SIDLEMODE(value)	(((value) & 0x3) << 3)
+#define CLOCKACTIVITY(value)	(((value) & 0x3) << 8)
+
+/********************** McBSP DMA operating modes **************************/
+#define MCBSP_DMA_MODE_ELEMENT		0
+#define MCBSP_DMA_MODE_THRESHOLD	1
+
+/********************** McBSP WAKEUPEN/IRQST/IRQEN bit definitions *********/
+#define RSYNCERREN		BIT(0)
+#define RFSREN			BIT(1)
+#define REOFEN			BIT(2)
+#define RRDYEN			BIT(3)
+#define RUNDFLEN		BIT(4)
+#define ROVFLEN			BIT(5)
+#define XSYNCERREN		BIT(7)
+#define XFSXEN			BIT(8)
+#define XEOFEN			BIT(9)
+#define XRDYEN			BIT(10)
+#define XUNDFLEN		BIT(11)
+#define XOVFLEN			BIT(12)
+#define XEMPTYEOFEN		BIT(14)
+
+/* Clock signal muxing options */
+#define CLKR_SRC_CLKR		0 /* CLKR signal is from the CLKR pin */
+#define CLKR_SRC_CLKX		1 /* CLKR signal is from the CLKX pin */
+#define FSR_SRC_FSR		2 /* FSR signal is from the FSR pin */
+#define FSR_SRC_FSX		3 /* FSR signal is from the FSX pin */
+
+/* McBSP functional clock sources */
+#define MCBSP_CLKS_PRCM_SRC	0
+#define MCBSP_CLKS_PAD_SRC	1
+
+/* we don't do multichannel for now */
+struct omap_mcbsp_reg_cfg {
+	u16 spcr2;
+	u16 spcr1;
+	u16 rcr2;
+	u16 rcr1;
+	u16 xcr2;
+	u16 xcr1;
+	u16 srgr2;
+	u16 srgr1;
+	u16 mcr2;
+	u16 mcr1;
+	u16 pcr0;
+	u16 rcerc;
+	u16 rcerd;
+	u16 xcerc;
+	u16 xcerd;
+	u16 rcere;
+	u16 rcerf;
+	u16 xcere;
+	u16 xcerf;
+	u16 rcerg;
+	u16 rcerh;
+	u16 xcerg;
+	u16 xcerh;
+	u16 xccr;
+	u16 rccr;
+};
+
+struct omap_mcbsp_st_data;
+
+struct omap_mcbsp {
+	struct device *dev;
+	struct clk *fclk;
+	spinlock_t lock;
+	unsigned long phys_base;
+	unsigned long phys_dma_base;
+	void __iomem *io_base;
+	u8 id;
+	/*
+	 * Flags indicating is the bus already activated and configured by
+	 * another substream
+	 */
+	int active;
+	int configured;
+	u8 free;
+
+	int irq;
+	int rx_irq;
+	int tx_irq;
+
+	/* Protect the field .free, while checking if the mcbsp is in use */
+	struct omap_mcbsp_platform_data *pdata;
+	struct omap_mcbsp_st_data *st_data;
+	struct omap_mcbsp_reg_cfg cfg_regs;
+	struct snd_dmaengine_dai_dma_data dma_data[2];
+	unsigned int dma_req[2];
+	int dma_op_mode;
+	u16 max_tx_thres;
+	u16 max_rx_thres;
+	void *reg_cache;
+	int reg_cache_size;
+
+	unsigned int fmt;
+	unsigned int in_freq;
+	unsigned int latency[2];
+	int clk_div;
+	int wlen;
+
+	struct pm_qos_request pm_qos_req;
+};
+
+static inline void omap_mcbsp_write(struct omap_mcbsp *mcbsp, u16 reg, u32 val)
+{
+	void __iomem *addr = mcbsp->io_base + reg * mcbsp->pdata->reg_step;
+
+	if (mcbsp->pdata->reg_size == 2) {
+		((u16 *)mcbsp->reg_cache)[reg] = (u16)val;
+		writew_relaxed((u16)val, addr);
+	} else {
+		((u32 *)mcbsp->reg_cache)[reg] = val;
+		writel_relaxed(val, addr);
+	}
+}
+
+static inline int omap_mcbsp_read(struct omap_mcbsp *mcbsp, u16 reg,
+				  bool from_cache)
+{
+	void __iomem *addr = mcbsp->io_base + reg * mcbsp->pdata->reg_step;
+
+	if (mcbsp->pdata->reg_size == 2) {
+		return !from_cache ? readw_relaxed(addr) :
+				     ((u16 *)mcbsp->reg_cache)[reg];
+	} else {
+		return !from_cache ? readl_relaxed(addr) :
+				     ((u32 *)mcbsp->reg_cache)[reg];
+	}
+}
+
+#define MCBSP_READ(mcbsp, reg) \
+		omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 0)
+#define MCBSP_WRITE(mcbsp, reg, val) \
+		omap_mcbsp_write(mcbsp, OMAP_MCBSP_REG_##reg, val)
+#define MCBSP_READ_CACHE(mcbsp, reg) \
+		omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 1)
+
+
+/* Sidetone specific API */
+int omap_mcbsp_st_init(struct platform_device *pdev);
+void omap_mcbsp_st_cleanup(struct platform_device *pdev);
+
+int omap_mcbsp_st_start(struct omap_mcbsp *mcbsp);
+int omap_mcbsp_st_stop(struct omap_mcbsp *mcbsp);
+
+#endif /* __OMAP_MCBSP_PRIV_H__ */