| /* 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__ */ |
