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 "mux2420.h"
11 #include "mux2430.h"
12 #include "mux34xx.h"
13 #include "mux44xx.h"
14
15 #define OMAP_MUX_TERMINATOR 0xffff
16
17 /* 34xx mux mode options for each pin. See TRM for options */
18 #define OMAP_MUX_MODE0 0
19 #define OMAP_MUX_MODE1 1
20 #define OMAP_MUX_MODE2 2
21 #define OMAP_MUX_MODE3 3
22 #define OMAP_MUX_MODE4 4
23 #define OMAP_MUX_MODE5 5
24 #define OMAP_MUX_MODE6 6
25 #define OMAP_MUX_MODE7 7
26
27 /* 24xx/34xx mux bit defines */
28 #define OMAP_PULL_ENA (1 << 3)
29 #define OMAP_PULL_UP (1 << 4)
30 #define OMAP_ALTELECTRICALSEL (1 << 5)
31
32 /* 34xx specific mux bit defines */
33 #define OMAP_INPUT_EN (1 << 8)
34 #define OMAP_OFF_EN (1 << 9)
35 #define OMAP_OFFOUT_EN (1 << 10)
36 #define OMAP_OFFOUT_VAL (1 << 11)
37 #define OMAP_OFF_PULL_EN (1 << 12)
38 #define OMAP_OFF_PULL_UP (1 << 13)
39 #define OMAP_WAKEUP_EN (1 << 14)
40
41 /* 44xx specific mux bit defines */
42 #define OMAP_WAKEUP_EVENT (1 << 15)
43
44 /* Active pin states */
45 #define OMAP_PIN_OUTPUT 0
46 #define OMAP_PIN_INPUT OMAP_INPUT_EN
47 #define OMAP_PIN_INPUT_PULLUP (OMAP_PULL_ENA | OMAP_INPUT_EN \
48 | OMAP_PULL_UP)
49 #define OMAP_PIN_INPUT_PULLDOWN (OMAP_PULL_ENA | OMAP_INPUT_EN)
50
51 /* Off mode states */
52 #define OMAP_PIN_OFF_NONE 0
53 #define OMAP_PIN_OFF_OUTPUT_HIGH (OMAP_OFF_EN | OMAP_OFFOUT_EN \
54 | OMAP_OFFOUT_VAL)
55 #define OMAP_PIN_OFF_OUTPUT_LOW (OMAP_OFF_EN | OMAP_OFFOUT_EN)
56 #define OMAP_PIN_OFF_INPUT_PULLUP (OMAP_OFF_EN | OMAP_OFF_PULL_EN \
57 | OMAP_OFF_PULL_UP)
58 #define OMAP_PIN_OFF_INPUT_PULLDOWN (OMAP_OFF_EN | OMAP_OFF_PULL_EN)
59 #define OMAP_PIN_OFF_WAKEUPENABLE OMAP_WAKEUP_EN
60
61 #define OMAP_MODE_GPIO(x) (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE4)
62
63 /* Flags for omapX_mux_init */
64 #define OMAP_PACKAGE_MASK 0xffff
65 #define OMAP_PACKAGE_CBS 8 /* 547-pin 0.40 0.40 */
66 #define OMAP_PACKAGE_CBL 7 /* 547-pin 0.40 0.40 */
67 #define OMAP_PACKAGE_CBP 6 /* 515-pin 0.40 0.50 */
68 #define OMAP_PACKAGE_CUS 5 /* 423-pin 0.65 */
69 #define OMAP_PACKAGE_CBB 4 /* 515-pin 0.40 0.50 */
70 #define OMAP_PACKAGE_CBC 3 /* 515-pin 0.50 0.65 */
71 #define OMAP_PACKAGE_ZAC 2 /* 24xx 447-pin POP */
72 #define OMAP_PACKAGE_ZAF 1 /* 2420 447-pin SIP */
73
74
75 #define OMAP_MUX_NR_MODES 8 /* Available modes */
76 #define OMAP_MUX_NR_SIDES 2 /* Bottom & top */
77
78 /*
79 * omap_mux_init flags definition:
80 *
81 * OMAP_MUX_REG_8BIT: Ensure that access to padconf is done in 8 bits.
82 * The default value is 16 bits.
83 * OMAP_MUX_GPIO_IN_MODE3: The GPIO is selected in mode3.
84 * The default is mode4.
85 */
86 #define OMAP_MUX_REG_8BIT (1 << 0)
87 #define OMAP_MUX_GPIO_IN_MODE3 (1 << 1)
88
89 /**
90 * struct omap_board_data - board specific device data
91 * @id: instance id
92 * @flags: additional flags for platform init code
93 * @pads: array of device specific pads
94 * @pads_cnt: ARRAY_SIZE() of pads
95 */
96 struct omap_board_data {
97 int id;
98 u32 flags;
99 struct omap_device_pad *pads;
100 int pads_cnt;
101 };
102
103 /**
104 * struct mux_partition - contain partition related information
105 * @name: name of the current partition
106 * @flags: flags specific to this partition
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 phys;
117 u32 size;
118 void __iomem *base;
119 struct list_head muxmodes;
120 struct list_head node;
121 };
122
123 /**
124 * struct omap_mux - data for omap mux register offset and it's value
125 * @reg_offset: mux register offset from the mux base
126 * @gpio: GPIO number
127 * @muxnames: available signal modes for a ball
128 * @balls: available balls on the package
129 * @partition: mux partition
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 #else
229
omap_mux_init_gpio(int gpio,int val)230 static inline int omap_mux_init_gpio(int gpio, int val)
231 {
232 return 0;
233 }
omap_mux_init_signal(char * muxname,int val)234 static inline int omap_mux_init_signal(char *muxname, int val)
235 {
236 return 0;
237 }
238
239 static inline struct omap_hwmod_mux_info *
omap_hwmod_mux_init(struct omap_device_pad * bpads,int nr_pads)240 omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
241 {
242 return NULL;
243 }
244
omap_hwmod_mux(struct omap_hwmod_mux_info * hmux,u8 state)245 static inline void omap_hwmod_mux(struct omap_hwmod_mux_info *hmux, u8 state)
246 {
247 }
248
249 static struct omap_board_mux *board_mux __maybe_unused;
250
251 #endif
252
253 /**
254 * omap_mux_get_gpio() - get mux register value based on GPIO number
255 * @gpio: GPIO number
256 *
257 */
258 u16 omap_mux_get_gpio(int gpio);
259
260 /**
261 * omap_mux_set_gpio() - set mux register value based on GPIO number
262 * @val: New mux register value
263 * @gpio: GPIO number
264 *
265 */
266 void omap_mux_set_gpio(u16 val, int gpio);
267
268 /**
269 * omap_mux_get() - get a mux partition by name
270 * @name: Name of the mux partition
271 *
272 */
273 struct omap_mux_partition *omap_mux_get(const char *name);
274
275 /**
276 * omap_mux_read() - read mux register
277 * @partition: Mux partition
278 * @mux_offset: Offset of the mux register
279 *
280 */
281 u16 omap_mux_read(struct omap_mux_partition *p, u16 mux_offset);
282
283 /**
284 * omap_mux_write() - write mux register
285 * @partition: Mux partition
286 * @val: New mux register value
287 * @mux_offset: Offset of the mux register
288 *
289 * This should be only needed for dynamic remuxing of non-gpio signals.
290 */
291 void omap_mux_write(struct omap_mux_partition *p, u16 val, u16 mux_offset);
292
293 /**
294 * omap_mux_write_array() - write an array of mux registers
295 * @partition: Mux partition
296 * @board_mux: Array of mux registers terminated by MAP_MUX_TERMINATOR
297 *
298 * This should be only needed for dynamic remuxing of non-gpio signals.
299 */
300 void omap_mux_write_array(struct omap_mux_partition *p,
301 struct omap_board_mux *board_mux);
302
303 /**
304 * omap2420_mux_init() - initialize mux system with board specific set
305 * @board_mux: Board specific mux table
306 * @flags: OMAP package type used for the board
307 */
308 int omap2420_mux_init(struct omap_board_mux *board_mux, int flags);
309
310 /**
311 * omap2430_mux_init() - initialize mux system with board specific set
312 * @board_mux: Board specific mux table
313 * @flags: OMAP package type used for the board
314 */
315 int omap2430_mux_init(struct omap_board_mux *board_mux, int flags);
316
317 /**
318 * omap3_mux_init() - initialize mux system with board specific set
319 * @board_mux: Board specific mux table
320 * @flags: OMAP package type used for the board
321 */
322 int omap3_mux_init(struct omap_board_mux *board_mux, int flags);
323
324 /**
325 * omap4_mux_init() - initialize mux system with board specific set
326 * @board_subset: Board specific mux table
327 * @board_wkup_subset: Board specific mux table for wakeup instance
328 * @flags: OMAP package type used for the board
329 */
330 int omap4_mux_init(struct omap_board_mux *board_subset,
331 struct omap_board_mux *board_wkup_subset, int flags);
332
333 /**
334 * omap_mux_init - private mux init function, do not call
335 */
336 int omap_mux_init(const char *name, u32 flags,
337 u32 mux_pbase, u32 mux_size,
338 struct omap_mux *superset,
339 struct omap_mux *package_subset,
340 struct omap_board_mux *board_mux,
341 struct omap_ball *package_balls);
342
343