1 /*
2 * Copyright (C) 2009 Nokia
3 * Copyright (C) 2009-2010 Texas Instruments
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10 #include "mux34xx.h"
11
12 #define OMAP_MUX_TERMINATOR 0xffff
13
14 /* 34xx mux mode options for each pin. See TRM for options */
15 #define OMAP_MUX_MODE0 0
16 #define OMAP_MUX_MODE1 1
17 #define OMAP_MUX_MODE2 2
18 #define OMAP_MUX_MODE3 3
19 #define OMAP_MUX_MODE4 4
20 #define OMAP_MUX_MODE5 5
21 #define OMAP_MUX_MODE6 6
22 #define OMAP_MUX_MODE7 7
23
24 /* 24xx/34xx mux bit defines */
25 #define OMAP_PULL_ENA (1 << 3)
26 #define OMAP_PULL_UP (1 << 4)
27 #define OMAP_ALTELECTRICALSEL (1 << 5)
28
29 /* omap3/4/5 specific mux bit defines */
30 #define OMAP_INPUT_EN (1 << 8)
31 #define OMAP_OFF_EN (1 << 9)
32 #define OMAP_OFFOUT_EN (1 << 10)
33 #define OMAP_OFFOUT_VAL (1 << 11)
34 #define OMAP_OFF_PULL_EN (1 << 12)
35 #define OMAP_OFF_PULL_UP (1 << 13)
36 #define OMAP_WAKEUP_EN (1 << 14)
37 #define OMAP_WAKEUP_EVENT (1 << 15)
38
39 /* Active pin states */
40 #define OMAP_PIN_OUTPUT 0
41 #define OMAP_PIN_INPUT OMAP_INPUT_EN
42 #define OMAP_PIN_INPUT_PULLUP (OMAP_PULL_ENA | OMAP_INPUT_EN \
43 | OMAP_PULL_UP)
44 #define OMAP_PIN_INPUT_PULLDOWN (OMAP_PULL_ENA | OMAP_INPUT_EN)
45
46 /* Off mode states */
47 #define OMAP_PIN_OFF_NONE 0
48 #define OMAP_PIN_OFF_OUTPUT_HIGH (OMAP_OFF_EN | OMAP_OFFOUT_EN \
49 | OMAP_OFFOUT_VAL)
50 #define OMAP_PIN_OFF_OUTPUT_LOW (OMAP_OFF_EN | OMAP_OFFOUT_EN)
51 #define OMAP_PIN_OFF_INPUT_PULLUP (OMAP_OFF_EN | OMAP_OFF_PULL_EN \
52 | OMAP_OFF_PULL_UP)
53 #define OMAP_PIN_OFF_INPUT_PULLDOWN (OMAP_OFF_EN | OMAP_OFF_PULL_EN)
54 #define OMAP_PIN_OFF_WAKEUPENABLE OMAP_WAKEUP_EN
55
56 #define OMAP_MODE_GPIO(partition, x) (((x) & OMAP_MUX_MODE7) == \
57 partition->gpio)
58 #define OMAP_MODE_UART(x) (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE0)
59
60 /* Flags for omapX_mux_init */
61 #define OMAP_PACKAGE_MASK 0xffff
62 #define OMAP_PACKAGE_CBP 6 /* 515-pin 0.40 0.50 */
63 #define OMAP_PACKAGE_CUS 5 /* 423-pin 0.65 */
64 #define OMAP_PACKAGE_CBB 4 /* 515-pin 0.40 0.50 */
65 #define OMAP_PACKAGE_CBC 3 /* 515-pin 0.50 0.65 */
66
67 #define OMAP_MUX_NR_MODES 8 /* Available modes */
68 #define OMAP_MUX_NR_SIDES 2 /* Bottom & top */
69
70 /*
71 * omap_mux_init flags definition:
72 *
73 * OMAP_GPIO_MUX_MODE, bits 0-2: gpio muxing mode, same like pad control
74 * register which includes values from 0-7.
75 * OMAP_MUX_REG_8BIT: Ensure that access to padconf is done in 8 bits.
76 * The default value is 16 bits.
77 */
78 #define OMAP_MUX_GPIO_IN_MODE0 OMAP_MUX_MODE0
79 #define OMAP_MUX_GPIO_IN_MODE1 OMAP_MUX_MODE1
80 #define OMAP_MUX_GPIO_IN_MODE2 OMAP_MUX_MODE2
81 #define OMAP_MUX_GPIO_IN_MODE3 OMAP_MUX_MODE3
82 #define OMAP_MUX_GPIO_IN_MODE4 OMAP_MUX_MODE4
83 #define OMAP_MUX_GPIO_IN_MODE5 OMAP_MUX_MODE5
84 #define OMAP_MUX_GPIO_IN_MODE6 OMAP_MUX_MODE6
85 #define OMAP_MUX_GPIO_IN_MODE7 OMAP_MUX_MODE7
86 #define OMAP_MUX_REG_8BIT (1 << 3)
87
88 /**
89 * struct omap_board_data - board specific device data
90 * @id: instance id
91 * @flags: additional flags for platform init code
92 * @pads: array of device specific pads
93 * @pads_cnt: ARRAY_SIZE() of pads
94 */
95 struct omap_board_data {
96 int id;
97 u32 flags;
98 struct omap_device_pad *pads;
99 int pads_cnt;
100 };
101
102 /**
103 * struct mux_partition - contain partition related information
104 * @name: name of the current partition
105 * @flags: flags specific to this partition
106 * @gpio: gpio mux mode
107 * @phys: physical address
108 * @size: partition size
109 * @base: virtual address after ioremap
110 * @muxmodes: list of nodes that belong to a partition
111 * @node: list node for the partitions linked list
112 */
113 struct omap_mux_partition {
114 const char *name;
115 u32 flags;
116 u32 gpio;
117 u32 phys;
118 u32 size;
119 void __iomem *base;
120 struct list_head muxmodes;
121 struct list_head node;
122 };
123
124 /**
125 * struct omap_mux - data for omap mux register offset and it's value
126 * @reg_offset: mux register offset from the mux base
127 * @gpio: GPIO number
128 * @muxnames: available signal modes for a ball
129 * @balls: available balls on the package
130 */
131 struct omap_mux {
132 u16 reg_offset;
133 u16 gpio;
134 #ifdef CONFIG_OMAP_MUX
135 char *muxnames[OMAP_MUX_NR_MODES];
136 #ifdef CONFIG_DEBUG_FS
137 char *balls[OMAP_MUX_NR_SIDES];
138 #endif
139 #endif
140 };
141
142 /**
143 * struct omap_ball - data for balls on omap package
144 * @reg_offset: mux register offset from the mux base
145 * @balls: available balls on the package
146 */
147 struct omap_ball {
148 u16 reg_offset;
149 char *balls[OMAP_MUX_NR_SIDES];
150 };
151
152 /**
153 * struct omap_board_mux - data for initializing mux registers
154 * @reg_offset: mux register offset from the mux base
155 * @mux_value: desired mux value to set
156 */
157 struct omap_board_mux {
158 u16 reg_offset;
159 u16 value;
160 };
161
162 #define OMAP_DEVICE_PAD_REMUX BIT(1) /* Dynamically remux a pad,
163 needs enable, idle and off
164 values */
165 #define OMAP_DEVICE_PAD_WAKEUP BIT(0) /* Pad is wake-up capable */
166
167 /**
168 * struct omap_device_pad - device specific pad configuration
169 * @name: signal name
170 * @flags: pad specific runtime flags
171 * @enable: runtime value for a pad
172 * @idle: idle value for a pad
173 * @off: off value for a pad, defaults to safe mode
174 * @partition: mux partition
175 * @mux: mux register
176 */
177 struct omap_device_pad {
178 char *name;
179 u8 flags;
180 u16 enable;
181 u16 idle;
182 u16 off;
183 struct omap_mux_partition *partition;
184 struct omap_mux *mux;
185 };
186
187 struct omap_hwmod_mux_info;
188
189 #define OMAP_MUX_STATIC(signal, mode) \
190 { \
191 .name = (signal), \
192 .enable = (mode), \
193 }
194
195 #if defined(CONFIG_OMAP_MUX)
196
197 /**
198 * omap_mux_init_gpio - initialize a signal based on the GPIO number
199 * @gpio: GPIO number
200 * @val: Options for the mux register value
201 */
202 int omap_mux_init_gpio(int gpio, int val);
203
204 /**
205 * omap_mux_init_signal - initialize a signal based on the signal name
206 * @muxname: Mux name in mode0_name.signal_name format
207 * @val: Options for the mux register value
208 */
209 int omap_mux_init_signal(const char *muxname, int val);
210
211 /**
212 * omap_hwmod_mux_init - initialize hwmod specific mux data
213 * @bpads: Board specific device signal names
214 * @nr_pads: Number of signal names for the device
215 */
216 extern struct omap_hwmod_mux_info *
217 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads);
218
219 /**
220 * omap_hwmod_mux - omap hwmod specific pin muxing
221 * @hmux: Pads for a hwmod
222 * @state: Desired _HWMOD_STATE
223 *
224 * Called only from omap_hwmod.c, do not use.
225 */
226 void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state);
227
228 int omap_mux_get_by_name(const char *muxname,
229 struct omap_mux_partition **found_partition,
230 struct omap_mux **found_mux);
231 #else
232
omap_mux_get_by_name(const char * muxname,struct omap_mux_partition ** found_partition,struct omap_mux ** found_mux)233 static inline int omap_mux_get_by_name(const char *muxname,
234 struct omap_mux_partition **found_partition,
235 struct omap_mux **found_mux)
236 {
237 return 0;
238 }
239
omap_mux_init_gpio(int gpio,int val)240 static inline int omap_mux_init_gpio(int gpio, int val)
241 {
242 return 0;
243 }
omap_mux_init_signal(char * muxname,int val)244 static inline int omap_mux_init_signal(char *muxname, int val)
245 {
246 return 0;
247 }
248
249 static inline struct omap_hwmod_mux_info *
omap_hwmod_mux_init(struct omap_device_pad * bpads,int nr_pads)250 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
251 {
252 return NULL;
253 }
254
omap_hwmod_mux(struct omap_hwmod_mux_info * hmux,u8 state)255 static inline void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
256 {
257 }
258
259 static struct omap_board_mux *board_mux __maybe_unused;
260
261 #endif
262
263 /**
264 * omap_mux_get_gpio() - get mux register value based on GPIO number
265 * @gpio: GPIO number
266 *
267 */
268 u16 omap_mux_get_gpio(int gpio);
269
270 /**
271 * omap_mux_set_gpio() - set mux register value based on GPIO number
272 * @val: New mux register value
273 * @gpio: GPIO number
274 *
275 */
276 void omap_mux_set_gpio(u16 val, int gpio);
277
278 /**
279 * omap_mux_get() - get a mux partition by name
280 * @name: Name of the mux partition
281 *
282 */
283 struct omap_mux_partition *omap_mux_get(const char *name);
284
285 /**
286 * omap_mux_read() - read mux register
287 * @partition: Mux partition
288 * @mux_offset: Offset of the mux register
289 *
290 */
291 u16 omap_mux_read(struct omap_mux_partition *p, u16 mux_offset);
292
293 /**
294 * omap_mux_write() - write mux register
295 * @partition: Mux partition
296 * @val: New mux register value
297 * @mux_offset: Offset of the mux register
298 *
299 * This should be only needed for dynamic remuxing of non-gpio signals.
300 */
301 void omap_mux_write(struct omap_mux_partition *p, u16 val, u16 mux_offset);
302
303 /**
304 * omap_mux_write_array() - write an array of mux registers
305 * @partition: Mux partition
306 * @board_mux: Array of mux registers terminated by MAP_MUX_TERMINATOR
307 *
308 * This should be only needed for dynamic remuxing of non-gpio signals.
309 */
310 void omap_mux_write_array(struct omap_mux_partition *p,
311 struct omap_board_mux *board_mux);
312
313 /**
314 * omap2420_mux_init() - initialize mux system with board specific set
315 * @board_mux: Board specific mux table
316 * @flags: OMAP package type used for the board
317 */
318 int omap2420_mux_init(struct omap_board_mux *board_mux, int flags);
319
320 /**
321 * omap2430_mux_init() - initialize mux system with board specific set
322 * @board_mux: Board specific mux table
323 * @flags: OMAP package type used for the board
324 */
325 int omap2430_mux_init(struct omap_board_mux *board_mux, int flags);
326
327 /**
328 * omap3_mux_init() - initialize mux system with board specific set
329 * @board_mux: Board specific mux table
330 * @flags: OMAP package type used for the board
331 */
332 int omap3_mux_init(struct omap_board_mux *board_mux, int flags);
333
334 /**
335 * omap4_mux_init() - initialize mux system with board specific set
336 * @board_subset: Board specific mux table
337 * @board_wkup_subset: Board specific mux table for wakeup instance
338 * @flags: OMAP package type used for the board
339 */
340 int omap4_mux_init(struct omap_board_mux *board_subset,
341 struct omap_board_mux *board_wkup_subset, int flags);
342
343 /**
344 * omap_mux_init - private mux init function, do not call
345 */
346 int omap_mux_init(const char *name, u32 flags,
347 u32 mux_pbase, u32 mux_size,
348 struct omap_mux *superset,
349 struct omap_mux *package_subset,
350 struct omap_board_mux *board_mux,
351 struct omap_ball *package_balls);
352
353