1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* -*- linux-c -*- *
3  *
4  * ALSA driver for the digigram lx6464es interface
5  * low-level interface
6  *
7  * Copyright (c) 2009 Tim Blechmann <tim@klingt.org>
8  */
9 
10 #ifndef LX_CORE_H
11 #define LX_CORE_H
12 
13 #include <linux/interrupt.h>
14 
15 #include "lx_defs.h"
16 
17 #define REG_CRM_NUMBER		12
18 
19 struct lx6464es;
20 
21 /* low-level register access */
22 
23 /* dsp register access */
24 enum {
25 	eReg_BASE,
26 	eReg_CSM,
27 	eReg_CRM1,
28 	eReg_CRM2,
29 	eReg_CRM3,
30 	eReg_CRM4,
31 	eReg_CRM5,
32 	eReg_CRM6,
33 	eReg_CRM7,
34 	eReg_CRM8,
35 	eReg_CRM9,
36 	eReg_CRM10,
37 	eReg_CRM11,
38 	eReg_CRM12,
39 
40 	eReg_ICR,
41 	eReg_CVR,
42 	eReg_ISR,
43 	eReg_RXHTXH,
44 	eReg_RXMTXM,
45 	eReg_RHLTXL,
46 	eReg_RESETDSP,
47 
48 	eReg_CSUF,
49 	eReg_CSES,
50 	eReg_CRESMSB,
51 	eReg_CRESLSB,
52 	eReg_ADMACESMSB,
53 	eReg_ADMACESLSB,
54 	eReg_CONFES,
55 
56 	eMaxPortLx
57 };
58 
59 unsigned long lx_dsp_reg_read(struct lx6464es *chip, int port);
60 void lx_dsp_reg_write(struct lx6464es *chip, int port, unsigned data);
61 
62 /* plx register access */
63 enum {
64     ePLX_PCICR,
65 
66     ePLX_MBOX0,
67     ePLX_MBOX1,
68     ePLX_MBOX2,
69     ePLX_MBOX3,
70     ePLX_MBOX4,
71     ePLX_MBOX5,
72     ePLX_MBOX6,
73     ePLX_MBOX7,
74 
75     ePLX_L2PCIDB,
76     ePLX_IRQCS,
77     ePLX_CHIPSC,
78 
79     eMaxPort
80 };
81 
82 unsigned long lx_plx_reg_read(struct lx6464es *chip, int port);
83 void lx_plx_reg_write(struct lx6464es *chip, int port, u32 data);
84 
85 /* rhm */
86 struct lx_rmh {
87 	u16	cmd_len;	/* length of the command to send (WORDs) */
88 	u16	stat_len;	/* length of the status received (WORDs) */
89 	u16	dsp_stat;	/* status type, RMP_SSIZE_XXX */
90 	u16	cmd_idx;	/* index of the command */
91 	u32	cmd[REG_CRM_NUMBER];
92 	u32	stat[REG_CRM_NUMBER];
93 };
94 
95 
96 /* low-level dsp access */
97 int lx_dsp_get_version(struct lx6464es *chip, u32 *rdsp_version);
98 int lx_dsp_get_clock_frequency(struct lx6464es *chip, u32 *rfreq);
99 int lx_dsp_set_granularity(struct lx6464es *chip, u32 gran);
100 int lx_dsp_read_async_events(struct lx6464es *chip, u32 *data);
101 int lx_dsp_get_mac(struct lx6464es *chip);
102 
103 
104 /* low-level pipe handling */
105 int lx_pipe_allocate(struct lx6464es *chip, u32 pipe, int is_capture,
106 		     int channels);
107 int lx_pipe_release(struct lx6464es *chip, u32 pipe, int is_capture);
108 int lx_pipe_sample_count(struct lx6464es *chip, u32 pipe, int is_capture,
109 			 u64 *rsample_count);
110 int lx_pipe_state(struct lx6464es *chip, u32 pipe, int is_capture, u16 *rstate);
111 int lx_pipe_stop(struct lx6464es *chip, u32 pipe, int is_capture);
112 int lx_pipe_start(struct lx6464es *chip, u32 pipe, int is_capture);
113 int lx_pipe_pause(struct lx6464es *chip, u32 pipe, int is_capture);
114 
115 int lx_pipe_wait_for_start(struct lx6464es *chip, u32 pipe, int is_capture);
116 int lx_pipe_wait_for_idle(struct lx6464es *chip, u32 pipe, int is_capture);
117 
118 /* low-level stream handling */
119 int lx_stream_set_format(struct lx6464es *chip, struct snd_pcm_runtime *runtime,
120 			 u32 pipe, int is_capture);
121 int lx_stream_state(struct lx6464es *chip, u32 pipe, int is_capture,
122 		    int *rstate);
123 int lx_stream_sample_position(struct lx6464es *chip, u32 pipe, int is_capture,
124 			      u64 *r_bytepos);
125 
126 int lx_stream_set_state(struct lx6464es *chip, u32 pipe,
127 			int is_capture, enum stream_state_t state);
128 
lx_stream_start(struct lx6464es * chip,u32 pipe,int is_capture)129 static inline int lx_stream_start(struct lx6464es *chip, u32 pipe,
130 				  int is_capture)
131 {
132 	snd_printdd("->lx_stream_start\n");
133 	return lx_stream_set_state(chip, pipe, is_capture, SSTATE_RUN);
134 }
135 
lx_stream_pause(struct lx6464es * chip,u32 pipe,int is_capture)136 static inline int lx_stream_pause(struct lx6464es *chip, u32 pipe,
137 				  int is_capture)
138 {
139 	snd_printdd("->lx_stream_pause\n");
140 	return lx_stream_set_state(chip, pipe, is_capture, SSTATE_PAUSE);
141 }
142 
lx_stream_stop(struct lx6464es * chip,u32 pipe,int is_capture)143 static inline int lx_stream_stop(struct lx6464es *chip, u32 pipe,
144 				 int is_capture)
145 {
146 	snd_printdd("->lx_stream_stop\n");
147 	return lx_stream_set_state(chip, pipe, is_capture, SSTATE_STOP);
148 }
149 
150 /* low-level buffer handling */
151 int lx_buffer_ask(struct lx6464es *chip, u32 pipe, int is_capture,
152 		  u32 *r_needed, u32 *r_freed, u32 *size_array);
153 int lx_buffer_give(struct lx6464es *chip, u32 pipe, int is_capture,
154 		   u32 buffer_size, u32 buf_address_lo, u32 buf_address_hi,
155 		   u32 *r_buffer_index);
156 int lx_buffer_free(struct lx6464es *chip, u32 pipe, int is_capture,
157 		   u32 *r_buffer_size);
158 int lx_buffer_cancel(struct lx6464es *chip, u32 pipe, int is_capture,
159 		     u32 buffer_index);
160 
161 /* low-level gain/peak handling */
162 int lx_level_unmute(struct lx6464es *chip, int is_capture, int unmute);
163 int lx_level_peaks(struct lx6464es *chip, int is_capture, int channels,
164 		   u32 *r_levels);
165 
166 
167 /* interrupt handling */
168 irqreturn_t lx_interrupt(int irq, void *dev_id);
169 irqreturn_t lx_threaded_irq(int irq, void *dev_id);
170 void lx_irq_enable(struct lx6464es *chip);
171 void lx_irq_disable(struct lx6464es *chip);
172 
173 
174 /* Stream Format Header Defines (for LIN and IEEE754) */
175 #define HEADER_FMT_BASE		HEADER_FMT_BASE_LIN
176 #define HEADER_FMT_BASE_LIN	0xFED00000
177 #define HEADER_FMT_BASE_FLOAT	0xFAD00000
178 #define HEADER_FMT_MONO		0x00000080 /* bit 23 in header_lo. WARNING: old
179 					    * bit 22 is ignored in float
180 					    * format */
181 #define HEADER_FMT_INTEL	0x00008000
182 #define HEADER_FMT_16BITS	0x00002000
183 #define HEADER_FMT_24BITS	0x00004000
184 #define HEADER_FMT_UPTO11	0x00000200 /* frequency is less or equ. to 11k.
185 					    * */
186 #define HEADER_FMT_UPTO32	0x00000100 /* frequency is over 11k and less
187 					    * then 32k.*/
188 
189 
190 #define BIT_FMP_HEADER          23
191 #define BIT_FMP_SD              22
192 #define BIT_FMP_MULTICHANNEL    19
193 
194 #define START_STATE             1
195 #define PAUSE_STATE             0
196 
197 
198 
199 
200 
201 /* from PcxAll_e.h */
202 /* Start/Pause condition for pipes (PCXStartPipe, PCXPausePipe) */
203 #define START_PAUSE_IMMEDIATE           0
204 #define START_PAUSE_ON_SYNCHRO          1
205 #define START_PAUSE_ON_TIME_CODE        2
206 
207 
208 /* Pipe / Stream state */
209 #define START_STATE             1
210 #define PAUSE_STATE             0
211 
unpack_pointer(dma_addr_t ptr,u32 * r_low,u32 * r_high)212 static inline void unpack_pointer(dma_addr_t ptr, u32 *r_low, u32 *r_high)
213 {
214 	*r_low = (u32)(ptr & 0xffffffff);
215 #if BITS_PER_LONG == 32
216 	*r_high = 0;
217 #else
218 	*r_high = (u32)((u64)ptr>>32);
219 #endif
220 }
221 
222 #endif /* LX_CORE_H */
223