1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * OMAP Multi-Channel Buffered Serial Port
4  *
5  * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
6  *          Peter Ujfalusi <peter.ujfalusi@ti.com>
7  */
8 
9 #ifndef __OMAP_MCBSP_PRIV_H__
10 #define __OMAP_MCBSP_PRIV_H__
11 
12 #include <linux/platform_data/asoc-ti-mcbsp.h>
13 
14 #ifdef CONFIG_ARCH_OMAP1
15 #define mcbsp_omap1()	1
16 #else
17 #define mcbsp_omap1()	0
18 #endif
19 
20 /* McBSP register numbers. Register address offset = num * reg_step */
21 enum {
22 	/* Common registers */
23 	OMAP_MCBSP_REG_SPCR2 = 4,
24 	OMAP_MCBSP_REG_SPCR1,
25 	OMAP_MCBSP_REG_RCR2,
26 	OMAP_MCBSP_REG_RCR1,
27 	OMAP_MCBSP_REG_XCR2,
28 	OMAP_MCBSP_REG_XCR1,
29 	OMAP_MCBSP_REG_SRGR2,
30 	OMAP_MCBSP_REG_SRGR1,
31 	OMAP_MCBSP_REG_MCR2,
32 	OMAP_MCBSP_REG_MCR1,
33 	OMAP_MCBSP_REG_RCERA,
34 	OMAP_MCBSP_REG_RCERB,
35 	OMAP_MCBSP_REG_XCERA,
36 	OMAP_MCBSP_REG_XCERB,
37 	OMAP_MCBSP_REG_PCR0,
38 	OMAP_MCBSP_REG_RCERC,
39 	OMAP_MCBSP_REG_RCERD,
40 	OMAP_MCBSP_REG_XCERC,
41 	OMAP_MCBSP_REG_XCERD,
42 	OMAP_MCBSP_REG_RCERE,
43 	OMAP_MCBSP_REG_RCERF,
44 	OMAP_MCBSP_REG_XCERE,
45 	OMAP_MCBSP_REG_XCERF,
46 	OMAP_MCBSP_REG_RCERG,
47 	OMAP_MCBSP_REG_RCERH,
48 	OMAP_MCBSP_REG_XCERG,
49 	OMAP_MCBSP_REG_XCERH,
50 
51 	/* OMAP1-OMAP2420 registers */
52 	OMAP_MCBSP_REG_DRR2 = 0,
53 	OMAP_MCBSP_REG_DRR1,
54 	OMAP_MCBSP_REG_DXR2,
55 	OMAP_MCBSP_REG_DXR1,
56 
57 	/* OMAP2430 and onwards */
58 	OMAP_MCBSP_REG_DRR = 0,
59 	OMAP_MCBSP_REG_DXR = 2,
60 	OMAP_MCBSP_REG_SYSCON =	35,
61 	OMAP_MCBSP_REG_THRSH2,
62 	OMAP_MCBSP_REG_THRSH1,
63 	OMAP_MCBSP_REG_IRQST = 40,
64 	OMAP_MCBSP_REG_IRQEN,
65 	OMAP_MCBSP_REG_WAKEUPEN,
66 	OMAP_MCBSP_REG_XCCR,
67 	OMAP_MCBSP_REG_RCCR,
68 	OMAP_MCBSP_REG_XBUFFSTAT,
69 	OMAP_MCBSP_REG_RBUFFSTAT,
70 	OMAP_MCBSP_REG_SSELCR,
71 };
72 
73 /************************** McBSP SPCR1 bit definitions ***********************/
74 #define RRST			BIT(0)
75 #define RRDY			BIT(1)
76 #define RFULL			BIT(2)
77 #define RSYNC_ERR		BIT(3)
78 #define RINTM(value)		(((value) & 0x3) << 4)	/* bits 4:5 */
79 #define ABIS			BIT(6)
80 #define DXENA			BIT(7)
81 #define CLKSTP(value)		(((value) & 0x3) << 11)	/* bits 11:12 */
82 #define RJUST(value)		(((value) & 0x3) << 13)	/* bits 13:14 */
83 #define ALB			BIT(15)
84 #define DLB			BIT(15)
85 
86 /************************** McBSP SPCR2 bit definitions ***********************/
87 #define XRST			BIT(0)
88 #define XRDY			BIT(1)
89 #define XEMPTY			BIT(2)
90 #define XSYNC_ERR		BIT(3)
91 #define XINTM(value)		(((value) & 0x3) << 4)	/* bits 4:5 */
92 #define GRST			BIT(6)
93 #define FRST			BIT(7)
94 #define SOFT			BIT(8)
95 #define FREE			BIT(9)
96 
97 /************************** McBSP PCR bit definitions *************************/
98 #define CLKRP			BIT(0)
99 #define CLKXP			BIT(1)
100 #define FSRP			BIT(2)
101 #define FSXP			BIT(3)
102 #define DR_STAT			BIT(4)
103 #define DX_STAT			BIT(5)
104 #define CLKS_STAT		BIT(6)
105 #define SCLKME			BIT(7)
106 #define CLKRM			BIT(8)
107 #define CLKXM			BIT(9)
108 #define FSRM			BIT(10)
109 #define FSXM			BIT(11)
110 #define RIOEN			BIT(12)
111 #define XIOEN			BIT(13)
112 #define IDLE_EN			BIT(14)
113 
114 /************************** McBSP RCR1 bit definitions ************************/
115 #define RWDLEN1(value)		(((value) & 0x7) << 5)	/* Bits 5:7 */
116 #define RFRLEN1(value)		(((value) & 0x7f) << 8)	/* Bits 8:14 */
117 
118 /************************** McBSP XCR1 bit definitions ************************/
119 #define XWDLEN1(value)		(((value) & 0x7) << 5)	/* Bits 5:7 */
120 #define XFRLEN1(value)		(((value) & 0x7f) << 8)	/* Bits 8:14 */
121 
122 /*************************** McBSP RCR2 bit definitions ***********************/
123 #define RDATDLY(value)		((value) & 0x3)		/* Bits 0:1 */
124 #define RFIG			BIT(2)
125 #define RCOMPAND(value)		(((value) & 0x3) << 3)	/* Bits 3:4 */
126 #define RWDLEN2(value)		(((value) & 0x7) << 5)	/* Bits 5:7 */
127 #define RFRLEN2(value)		(((value) & 0x7f) << 8)	/* Bits 8:14 */
128 #define RPHASE			BIT(15)
129 
130 /*************************** McBSP XCR2 bit definitions ***********************/
131 #define XDATDLY(value)		((value) & 0x3)		/* Bits 0:1 */
132 #define XFIG			BIT(2)
133 #define XCOMPAND(value)		(((value) & 0x3) << 3)	/* Bits 3:4 */
134 #define XWDLEN2(value)		(((value) & 0x7) << 5)	/* Bits 5:7 */
135 #define XFRLEN2(value)		(((value) & 0x7f) << 8)	/* Bits 8:14 */
136 #define XPHASE			BIT(15)
137 
138 /************************* McBSP SRGR1 bit definitions ************************/
139 #define CLKGDV(value)		((value) & 0x7f)		/* Bits 0:7 */
140 #define FWID(value)		(((value) & 0xff) << 8)	/* Bits 8:15 */
141 
142 /************************* McBSP SRGR2 bit definitions ************************/
143 #define FPER(value)		((value) & 0x0fff)	/* Bits 0:11 */
144 #define FSGM			BIT(12)
145 #define CLKSM			BIT(13)
146 #define CLKSP			BIT(14)
147 #define GSYNC			BIT(15)
148 
149 /************************* McBSP MCR1 bit definitions *************************/
150 #define RMCM			BIT(0)
151 #define RCBLK(value)		(((value) & 0x7) << 2)	/* Bits 2:4 */
152 #define RPABLK(value)		(((value) & 0x3) << 5)	/* Bits 5:6 */
153 #define RPBBLK(value)		(((value) & 0x3) << 7)	/* Bits 7:8 */
154 
155 /************************* McBSP MCR2 bit definitions *************************/
156 #define XMCM(value)		((value) & 0x3)		/* Bits 0:1 */
157 #define XCBLK(value)		(((value) & 0x7) << 2)	/* Bits 2:4 */
158 #define XPABLK(value)		(((value) & 0x3) << 5)	/* Bits 5:6 */
159 #define XPBBLK(value)		(((value) & 0x3) << 7)	/* Bits 7:8 */
160 
161 /*********************** McBSP XCCR bit definitions *************************/
162 #define XDISABLE		BIT(0)
163 #define XDMAEN			BIT(3)
164 #define DILB			BIT(5)
165 #define XFULL_CYCLE		BIT(11)
166 #define DXENDLY(value)		(((value) & 0x3) << 12)	/* Bits 12:13 */
167 #define PPCONNECT		BIT(14)
168 #define EXTCLKGATE		BIT(15)
169 
170 /********************** McBSP RCCR bit definitions *************************/
171 #define RDISABLE		BIT(0)
172 #define RDMAEN			BIT(3)
173 #define RFULL_CYCLE		BIT(11)
174 
175 /********************** McBSP SYSCONFIG bit definitions ********************/
176 #define SOFTRST			BIT(1)
177 #define ENAWAKEUP		BIT(2)
178 #define SIDLEMODE(value)	(((value) & 0x3) << 3)
179 #define CLOCKACTIVITY(value)	(((value) & 0x3) << 8)
180 
181 /********************** McBSP DMA operating modes **************************/
182 #define MCBSP_DMA_MODE_ELEMENT		0
183 #define MCBSP_DMA_MODE_THRESHOLD	1
184 
185 /********************** McBSP WAKEUPEN/IRQST/IRQEN bit definitions *********/
186 #define RSYNCERREN		BIT(0)
187 #define RFSREN			BIT(1)
188 #define REOFEN			BIT(2)
189 #define RRDYEN			BIT(3)
190 #define RUNDFLEN		BIT(4)
191 #define ROVFLEN			BIT(5)
192 #define XSYNCERREN		BIT(7)
193 #define XFSXEN			BIT(8)
194 #define XEOFEN			BIT(9)
195 #define XRDYEN			BIT(10)
196 #define XUNDFLEN		BIT(11)
197 #define XOVFLEN			BIT(12)
198 #define XEMPTYEOFEN		BIT(14)
199 
200 /* Clock signal muxing options */
201 #define CLKR_SRC_CLKR		0 /* CLKR signal is from the CLKR pin */
202 #define CLKR_SRC_CLKX		1 /* CLKR signal is from the CLKX pin */
203 #define FSR_SRC_FSR		2 /* FSR signal is from the FSR pin */
204 #define FSR_SRC_FSX		3 /* FSR signal is from the FSX pin */
205 
206 /* McBSP functional clock sources */
207 #define MCBSP_CLKS_PRCM_SRC	0
208 #define MCBSP_CLKS_PAD_SRC	1
209 
210 /* we don't do multichannel for now */
211 struct omap_mcbsp_reg_cfg {
212 	u16 spcr2;
213 	u16 spcr1;
214 	u16 rcr2;
215 	u16 rcr1;
216 	u16 xcr2;
217 	u16 xcr1;
218 	u16 srgr2;
219 	u16 srgr1;
220 	u16 mcr2;
221 	u16 mcr1;
222 	u16 pcr0;
223 	u16 rcerc;
224 	u16 rcerd;
225 	u16 xcerc;
226 	u16 xcerd;
227 	u16 rcere;
228 	u16 rcerf;
229 	u16 xcere;
230 	u16 xcerf;
231 	u16 rcerg;
232 	u16 rcerh;
233 	u16 xcerg;
234 	u16 xcerh;
235 	u16 xccr;
236 	u16 rccr;
237 };
238 
239 struct omap_mcbsp_st_data;
240 
241 struct omap_mcbsp {
242 	struct device *dev;
243 	struct clk *fclk;
244 	spinlock_t lock;
245 	unsigned long phys_base;
246 	unsigned long phys_dma_base;
247 	void __iomem *io_base;
248 	u8 id;
249 	/*
250 	 * Flags indicating is the bus already activated and configured by
251 	 * another substream
252 	 */
253 	int active;
254 	int configured;
255 	u8 free;
256 
257 	int irq;
258 	int rx_irq;
259 	int tx_irq;
260 
261 	/* Protect the field .free, while checking if the mcbsp is in use */
262 	struct omap_mcbsp_platform_data *pdata;
263 	struct omap_mcbsp_st_data *st_data;
264 	struct omap_mcbsp_reg_cfg cfg_regs;
265 	struct snd_dmaengine_dai_dma_data dma_data[2];
266 	unsigned int dma_req[2];
267 	int dma_op_mode;
268 	u16 max_tx_thres;
269 	u16 max_rx_thres;
270 	void *reg_cache;
271 	int reg_cache_size;
272 
273 	unsigned int fmt;
274 	unsigned int in_freq;
275 	unsigned int latency[2];
276 	int clk_div;
277 	int wlen;
278 
279 	struct pm_qos_request pm_qos_req;
280 };
281 
omap_mcbsp_write(struct omap_mcbsp * mcbsp,u16 reg,u32 val)282 static inline void omap_mcbsp_write(struct omap_mcbsp *mcbsp, u16 reg, u32 val)
283 {
284 	void __iomem *addr = mcbsp->io_base + reg * mcbsp->pdata->reg_step;
285 
286 	if (mcbsp->pdata->reg_size == 2) {
287 		((u16 *)mcbsp->reg_cache)[reg] = (u16)val;
288 		writew_relaxed((u16)val, addr);
289 	} else {
290 		((u32 *)mcbsp->reg_cache)[reg] = val;
291 		writel_relaxed(val, addr);
292 	}
293 }
294 
omap_mcbsp_read(struct omap_mcbsp * mcbsp,u16 reg,bool from_cache)295 static inline int omap_mcbsp_read(struct omap_mcbsp *mcbsp, u16 reg,
296 				  bool from_cache)
297 {
298 	void __iomem *addr = mcbsp->io_base + reg * mcbsp->pdata->reg_step;
299 
300 	if (mcbsp->pdata->reg_size == 2) {
301 		return !from_cache ? readw_relaxed(addr) :
302 				     ((u16 *)mcbsp->reg_cache)[reg];
303 	} else {
304 		return !from_cache ? readl_relaxed(addr) :
305 				     ((u32 *)mcbsp->reg_cache)[reg];
306 	}
307 }
308 
309 #define MCBSP_READ(mcbsp, reg) \
310 		omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 0)
311 #define MCBSP_WRITE(mcbsp, reg, val) \
312 		omap_mcbsp_write(mcbsp, OMAP_MCBSP_REG_##reg, val)
313 #define MCBSP_READ_CACHE(mcbsp, reg) \
314 		omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 1)
315 
316 
317 /* Sidetone specific API */
318 int omap_mcbsp_st_init(struct platform_device *pdev);
319 int omap_mcbsp_st_start(struct omap_mcbsp *mcbsp);
320 int omap_mcbsp_st_stop(struct omap_mcbsp *mcbsp);
321 
322 #endif /* __OMAP_MCBSP_PRIV_H__ */
323