projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'omap-fixes-for-linus' into omap-for-linus
[deliverable/linux.git] / arch / arm / mach-omap2 / mux.c
1 /*
2 * linux/arch/arm/mach-omap2/mux.c
3 *
4 * OMAP2 and OMAP3 pin multiplexing configurations
5 *
6 * Copyright (C) 2004 - 2008 Texas Instruments Inc.
7 * Copyright (C) 2003 - 2008 Nokia Corporation
8 *
9 * Written by Tony Lindgren
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 *
25 */
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/io.h>
29 #include <linux/spinlock.h>
30 #include <linux/list.h>
31 #include <linux/ctype.h>
32 #include <linux/debugfs.h>
33 #include <linux/seq_file.h>
34 #include <linux/uaccess.h>
35
36 #include <asm/system.h>
37
38 #include <plat/control.h>
39 #include <plat/mux.h>
40
41 #include "mux.h"
42
43 #define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */
44 #define OMAP_MUX_BASE_SZ 0x5ca
45
46 struct omap_mux_entry {
47 struct omap_mux mux;
48 struct list_head node;
49 };
50
51 static unsigned long mux_phys;
52 static void __iomem *mux_base;
53
54 u16 omap_mux_read(u16 reg)
55 {
56 if (cpu_is_omap24xx())
57 return __raw_readb(mux_base + reg);
58 else
59 return __raw_readw(mux_base + reg);
60 }
61
62 void omap_mux_write(u16 val, u16 reg)
63 {
64 if (cpu_is_omap24xx())
65 __raw_writeb(val, mux_base + reg);
66 else
67 __raw_writew(val, mux_base + reg);
68 }
69
70 void omap_mux_write_array(struct omap_board_mux *board_mux)
71 {
72 while (board_mux->reg_offset != OMAP_MUX_TERMINATOR) {
73 omap_mux_write(board_mux->value, board_mux->reg_offset);
74 board_mux++;
75 }
76 }
77
78 #if defined(CONFIG_ARCH_OMAP2) && defined(CONFIG_OMAP_MUX)
79
80 static struct omap_mux_cfg arch_mux_cfg;
81
82 /* NOTE: See mux.h for the enumeration */
83
84 static struct pin_config __initdata_or_module omap24xx_pins[] = {
85 /*
86 * description mux mux pull pull debug
87 * offset mode ena type
88 */
89
90 /* 24xx I2C */
91 MUX_CFG_24XX("M19_24XX_I2C1_SCL", 0x111, 0, 0, 0, 1)
92 MUX_CFG_24XX("L15_24XX_I2C1_SDA", 0x112, 0, 0, 0, 1)
93 MUX_CFG_24XX("J15_24XX_I2C2_SCL", 0x113, 0, 0, 1, 1)
94 MUX_CFG_24XX("H19_24XX_I2C2_SDA", 0x114, 0, 0, 0, 1)
95
96 /* Menelaus interrupt */
97 MUX_CFG_24XX("W19_24XX_SYS_NIRQ", 0x12c, 0, 1, 1, 1)
98
99 /* 24xx clocks */
100 MUX_CFG_24XX("W14_24XX_SYS_CLKOUT", 0x137, 0, 1, 1, 1)
101
102 /* 24xx GPMC chipselects, wait pin monitoring */
103 MUX_CFG_24XX("E2_GPMC_NCS2", 0x08e, 0, 1, 1, 1)
104 MUX_CFG_24XX("L2_GPMC_NCS7", 0x093, 0, 1, 1, 1)
105 MUX_CFG_24XX("L3_GPMC_WAIT0", 0x09a, 0, 1, 1, 1)
106 MUX_CFG_24XX("N7_GPMC_WAIT1", 0x09b, 0, 1, 1, 1)
107 MUX_CFG_24XX("M1_GPMC_WAIT2", 0x09c, 0, 1, 1, 1)
108 MUX_CFG_24XX("P1_GPMC_WAIT3", 0x09d, 0, 1, 1, 1)
109
110 /* 24xx McBSP */
111 MUX_CFG_24XX("Y15_24XX_MCBSP2_CLKX", 0x124, 1, 1, 0, 1)
112 MUX_CFG_24XX("R14_24XX_MCBSP2_FSX", 0x125, 1, 1, 0, 1)
113 MUX_CFG_24XX("W15_24XX_MCBSP2_DR", 0x126, 1, 1, 0, 1)
114 MUX_CFG_24XX("V15_24XX_MCBSP2_DX", 0x127, 1, 1, 0, 1)
115
116 /* 24xx GPIO */
117 MUX_CFG_24XX("M21_242X_GPIO11", 0x0c9, 3, 1, 1, 1)
118 MUX_CFG_24XX("P21_242X_GPIO12", 0x0ca, 3, 0, 0, 1)
119 MUX_CFG_24XX("AA10_242X_GPIO13", 0x0e5, 3, 0, 0, 1)
120 MUX_CFG_24XX("AA6_242X_GPIO14", 0x0e6, 3, 0, 0, 1)
121 MUX_CFG_24XX("AA4_242X_GPIO15", 0x0e7, 3, 0, 0, 1)
122 MUX_CFG_24XX("Y11_242X_GPIO16", 0x0e8, 3, 0, 0, 1)
123 MUX_CFG_24XX("AA12_242X_GPIO17", 0x0e9, 3, 0, 0, 1)
124 MUX_CFG_24XX("AA8_242X_GPIO58", 0x0ea, 3, 0, 0, 1)
125 MUX_CFG_24XX("Y20_24XX_GPIO60", 0x12c, 3, 0, 0, 1)
126 MUX_CFG_24XX("W4__24XX_GPIO74", 0x0f2, 3, 0, 0, 1)
127 MUX_CFG_24XX("N15_24XX_GPIO85", 0x103, 3, 0, 0, 1)
128 MUX_CFG_24XX("M15_24XX_GPIO92", 0x10a, 3, 0, 0, 1)
129 MUX_CFG_24XX("P20_24XX_GPIO93", 0x10b, 3, 0, 0, 1)
130 MUX_CFG_24XX("P18_24XX_GPIO95", 0x10d, 3, 0, 0, 1)
131 MUX_CFG_24XX("M18_24XX_GPIO96", 0x10e, 3, 0, 0, 1)
132 MUX_CFG_24XX("L14_24XX_GPIO97", 0x10f, 3, 0, 0, 1)
133 MUX_CFG_24XX("J15_24XX_GPIO99", 0x113, 3, 1, 1, 1)
134 MUX_CFG_24XX("V14_24XX_GPIO117", 0x128, 3, 1, 0, 1)
135 MUX_CFG_24XX("P14_24XX_GPIO125", 0x140, 3, 1, 1, 1)
136
137 /* 242x DBG GPIO */
138 MUX_CFG_24XX("V4_242X_GPIO49", 0xd3, 3, 0, 0, 1)
139 MUX_CFG_24XX("W2_242X_GPIO50", 0xd4, 3, 0, 0, 1)
140 MUX_CFG_24XX("U4_242X_GPIO51", 0xd5, 3, 0, 0, 1)
141 MUX_CFG_24XX("V3_242X_GPIO52", 0xd6, 3, 0, 0, 1)
142 MUX_CFG_24XX("V2_242X_GPIO53", 0xd7, 3, 0, 0, 1)
143 MUX_CFG_24XX("V6_242X_GPIO53", 0xcf, 3, 0, 0, 1)
144 MUX_CFG_24XX("T4_242X_GPIO54", 0xd8, 3, 0, 0, 1)
145 MUX_CFG_24XX("Y4_242X_GPIO54", 0xd0, 3, 0, 0, 1)
146 MUX_CFG_24XX("T3_242X_GPIO55", 0xd9, 3, 0, 0, 1)
147 MUX_CFG_24XX("U2_242X_GPIO56", 0xda, 3, 0, 0, 1)
148
149 /* 24xx external DMA requests */
150 MUX_CFG_24XX("AA10_242X_DMAREQ0", 0x0e5, 2, 0, 0, 1)
151 MUX_CFG_24XX("AA6_242X_DMAREQ1", 0x0e6, 2, 0, 0, 1)
152 MUX_CFG_24XX("E4_242X_DMAREQ2", 0x074, 2, 0, 0, 1)
153 MUX_CFG_24XX("G4_242X_DMAREQ3", 0x073, 2, 0, 0, 1)
154 MUX_CFG_24XX("D3_242X_DMAREQ4", 0x072, 2, 0, 0, 1)
155 MUX_CFG_24XX("E3_242X_DMAREQ5", 0x071, 2, 0, 0, 1)
156
157 /* UART3 */
158 MUX_CFG_24XX("K15_24XX_UART3_TX", 0x118, 0, 0, 0, 1)
159 MUX_CFG_24XX("K14_24XX_UART3_RX", 0x119, 0, 0, 0, 1)
160
161 /* MMC/SDIO */
162 MUX_CFG_24XX("G19_24XX_MMC_CLKO", 0x0f3, 0, 0, 0, 1)
163 MUX_CFG_24XX("H18_24XX_MMC_CMD", 0x0f4, 0, 0, 0, 1)
164 MUX_CFG_24XX("F20_24XX_MMC_DAT0", 0x0f5, 0, 0, 0, 1)
165 MUX_CFG_24XX("H14_24XX_MMC_DAT1", 0x0f6, 0, 0, 0, 1)
166 MUX_CFG_24XX("E19_24XX_MMC_DAT2", 0x0f7, 0, 0, 0, 1)
167 MUX_CFG_24XX("D19_24XX_MMC_DAT3", 0x0f8, 0, 0, 0, 1)
168 MUX_CFG_24XX("F19_24XX_MMC_DAT_DIR0", 0x0f9, 0, 0, 0, 1)
169 MUX_CFG_24XX("E20_24XX_MMC_DAT_DIR1", 0x0fa, 0, 0, 0, 1)
170 MUX_CFG_24XX("F18_24XX_MMC_DAT_DIR2", 0x0fb, 0, 0, 0, 1)
171 MUX_CFG_24XX("E18_24XX_MMC_DAT_DIR3", 0x0fc, 0, 0, 0, 1)
172 MUX_CFG_24XX("G18_24XX_MMC_CMD_DIR", 0x0fd, 0, 0, 0, 1)
173 MUX_CFG_24XX("H15_24XX_MMC_CLKI", 0x0fe, 0, 0, 0, 1)
174
175 /* Full speed USB */
176 MUX_CFG_24XX("J20_24XX_USB0_PUEN", 0x11d, 0, 0, 0, 1)
177 MUX_CFG_24XX("J19_24XX_USB0_VP", 0x11e, 0, 0, 0, 1)
178 MUX_CFG_24XX("K20_24XX_USB0_VM", 0x11f, 0, 0, 0, 1)
179 MUX_CFG_24XX("J18_24XX_USB0_RCV", 0x120, 0, 0, 0, 1)
180 MUX_CFG_24XX("K19_24XX_USB0_TXEN", 0x121, 0, 0, 0, 1)
181 MUX_CFG_24XX("J14_24XX_USB0_SE0", 0x122, 0, 0, 0, 1)
182 MUX_CFG_24XX("K18_24XX_USB0_DAT", 0x123, 0, 0, 0, 1)
183
184 MUX_CFG_24XX("N14_24XX_USB1_SE0", 0x0ed, 2, 0, 0, 1)
185 MUX_CFG_24XX("W12_24XX_USB1_SE0", 0x0dd, 3, 0, 0, 1)
186 MUX_CFG_24XX("P15_24XX_USB1_DAT", 0x0ee, 2, 0, 0, 1)
187 MUX_CFG_24XX("R13_24XX_USB1_DAT", 0x0e0, 3, 0, 0, 1)
188 MUX_CFG_24XX("W20_24XX_USB1_TXEN", 0x0ec, 2, 0, 0, 1)
189 MUX_CFG_24XX("P13_24XX_USB1_TXEN", 0x0df, 3, 0, 0, 1)
190 MUX_CFG_24XX("V19_24XX_USB1_RCV", 0x0eb, 2, 0, 0, 1)
191 MUX_CFG_24XX("V12_24XX_USB1_RCV", 0x0de, 3, 0, 0, 1)
192
193 MUX_CFG_24XX("AA10_24XX_USB2_SE0", 0x0e5, 2, 0, 0, 1)
194 MUX_CFG_24XX("Y11_24XX_USB2_DAT", 0x0e8, 2, 0, 0, 1)
195 MUX_CFG_24XX("AA12_24XX_USB2_TXEN", 0x0e9, 2, 0, 0, 1)
196 MUX_CFG_24XX("AA6_24XX_USB2_RCV", 0x0e6, 2, 0, 0, 1)
197 MUX_CFG_24XX("AA4_24XX_USB2_TLLSE0", 0x0e7, 2, 0, 0, 1)
198
199 /* Keypad GPIO*/
200 MUX_CFG_24XX("T19_24XX_KBR0", 0x106, 3, 1, 1, 1)
201 MUX_CFG_24XX("R19_24XX_KBR1", 0x107, 3, 1, 1, 1)
202 MUX_CFG_24XX("V18_24XX_KBR2", 0x139, 3, 1, 1, 1)
203 MUX_CFG_24XX("M21_24XX_KBR3", 0xc9, 3, 1, 1, 1)
204 MUX_CFG_24XX("E5__24XX_KBR4", 0x138, 3, 1, 1, 1)
205 MUX_CFG_24XX("M18_24XX_KBR5", 0x10e, 3, 1, 1, 1)
206 MUX_CFG_24XX("R20_24XX_KBC0", 0x108, 3, 0, 0, 1)
207 MUX_CFG_24XX("M14_24XX_KBC1", 0x109, 3, 0, 0, 1)
208 MUX_CFG_24XX("H19_24XX_KBC2", 0x114, 3, 0, 0, 1)
209 MUX_CFG_24XX("V17_24XX_KBC3", 0x135, 3, 0, 0, 1)
210 MUX_CFG_24XX("P21_24XX_KBC4", 0xca, 3, 0, 0, 1)
211 MUX_CFG_24XX("L14_24XX_KBC5", 0x10f, 3, 0, 0, 1)
212 MUX_CFG_24XX("N19_24XX_KBC6", 0x110, 3, 0, 0, 1)
213
214 /* 24xx Menelaus Keypad GPIO */
215 MUX_CFG_24XX("B3__24XX_KBR5", 0x30, 3, 1, 1, 1)
216 MUX_CFG_24XX("AA4_24XX_KBC2", 0xe7, 3, 0, 0, 1)
217 MUX_CFG_24XX("B13_24XX_KBC6", 0x110, 3, 0, 0, 1)
218
219 /* 2430 USB */
220 MUX_CFG_24XX("AD9_2430_USB0_PUEN", 0x133, 4, 0, 0, 1)
221 MUX_CFG_24XX("Y11_2430_USB0_VP", 0x134, 4, 0, 0, 1)
222 MUX_CFG_24XX("AD7_2430_USB0_VM", 0x135, 4, 0, 0, 1)
223 MUX_CFG_24XX("AE7_2430_USB0_RCV", 0x136, 4, 0, 0, 1)
224 MUX_CFG_24XX("AD4_2430_USB0_TXEN", 0x137, 4, 0, 0, 1)
225 MUX_CFG_24XX("AF9_2430_USB0_SE0", 0x138, 4, 0, 0, 1)
226 MUX_CFG_24XX("AE6_2430_USB0_DAT", 0x139, 4, 0, 0, 1)
227 MUX_CFG_24XX("AD24_2430_USB1_SE0", 0x107, 2, 0, 0, 1)
228 MUX_CFG_24XX("AB24_2430_USB1_RCV", 0x108, 2, 0, 0, 1)
229 MUX_CFG_24XX("Y25_2430_USB1_TXEN", 0x109, 2, 0, 0, 1)
230 MUX_CFG_24XX("AA26_2430_USB1_DAT", 0x10A, 2, 0, 0, 1)
231
232 /* 2430 HS-USB */
233 MUX_CFG_24XX("AD9_2430_USB0HS_DATA3", 0x133, 0, 0, 0, 1)
234 MUX_CFG_24XX("Y11_2430_USB0HS_DATA4", 0x134, 0, 0, 0, 1)
235 MUX_CFG_24XX("AD7_2430_USB0HS_DATA5", 0x135, 0, 0, 0, 1)
236 MUX_CFG_24XX("AE7_2430_USB0HS_DATA6", 0x136, 0, 0, 0, 1)
237 MUX_CFG_24XX("AD4_2430_USB0HS_DATA2", 0x137, 0, 0, 0, 1)
238 MUX_CFG_24XX("AF9_2430_USB0HS_DATA0", 0x138, 0, 0, 0, 1)
239 MUX_CFG_24XX("AE6_2430_USB0HS_DATA1", 0x139, 0, 0, 0, 1)
240 MUX_CFG_24XX("AE8_2430_USB0HS_CLK", 0x13A, 0, 0, 0, 1)
241 MUX_CFG_24XX("AD8_2430_USB0HS_DIR", 0x13B, 0, 0, 0, 1)
242 MUX_CFG_24XX("AE5_2430_USB0HS_STP", 0x13c, 0, 1, 1, 1)
243 MUX_CFG_24XX("AE9_2430_USB0HS_NXT", 0x13D, 0, 0, 0, 1)
244 MUX_CFG_24XX("AC7_2430_USB0HS_DATA7", 0x13E, 0, 0, 0, 1)
245
246 /* 2430 McBSP */
247 MUX_CFG_24XX("AD6_2430_MCBSP_CLKS", 0x011E, 0, 0, 0, 1)
248
249 MUX_CFG_24XX("AB2_2430_MCBSP1_CLKR", 0x011A, 0, 0, 0, 1)
250 MUX_CFG_24XX("AD5_2430_MCBSP1_FSR", 0x011B, 0, 0, 0, 1)
251 MUX_CFG_24XX("AA1_2430_MCBSP1_DX", 0x011C, 0, 0, 0, 1)
252 MUX_CFG_24XX("AF3_2430_MCBSP1_DR", 0x011D, 0, 0, 0, 1)
253 MUX_CFG_24XX("AB3_2430_MCBSP1_FSX", 0x011F, 0, 0, 0, 1)
254 MUX_CFG_24XX("Y9_2430_MCBSP1_CLKX", 0x0120, 0, 0, 0, 1)
255
256 MUX_CFG_24XX("AC10_2430_MCBSP2_FSX", 0x012E, 1, 0, 0, 1)
257 MUX_CFG_24XX("AD16_2430_MCBSP2_CLX", 0x012F, 1, 0, 0, 1)
258 MUX_CFG_24XX("AE13_2430_MCBSP2_DX", 0x0130, 1, 0, 0, 1)
259 MUX_CFG_24XX("AD13_2430_MCBSP2_DR", 0x0131, 1, 0, 0, 1)
260 MUX_CFG_24XX("AC10_2430_MCBSP2_FSX_OFF",0x012E, 0, 0, 0, 1)
261 MUX_CFG_24XX("AD16_2430_MCBSP2_CLX_OFF",0x012F, 0, 0, 0, 1)
262 MUX_CFG_24XX("AE13_2430_MCBSP2_DX_OFF", 0x0130, 0, 0, 0, 1)
263 MUX_CFG_24XX("AD13_2430_MCBSP2_DR_OFF", 0x0131, 0, 0, 0, 1)
264
265 MUX_CFG_24XX("AC9_2430_MCBSP3_CLKX", 0x0103, 0, 0, 0, 1)
266 MUX_CFG_24XX("AE4_2430_MCBSP3_FSX", 0x0104, 0, 0, 0, 1)
267 MUX_CFG_24XX("AE2_2430_MCBSP3_DR", 0x0105, 0, 0, 0, 1)
268 MUX_CFG_24XX("AF4_2430_MCBSP3_DX", 0x0106, 0, 0, 0, 1)
269
270 MUX_CFG_24XX("N3_2430_MCBSP4_CLKX", 0x010B, 1, 0, 0, 1)
271 MUX_CFG_24XX("AD23_2430_MCBSP4_DR", 0x010C, 1, 0, 0, 1)
272 MUX_CFG_24XX("AB25_2430_MCBSP4_DX", 0x010D, 1, 0, 0, 1)
273 MUX_CFG_24XX("AC25_2430_MCBSP4_FSX", 0x010E, 1, 0, 0, 1)
274
275 MUX_CFG_24XX("AE16_2430_MCBSP5_CLKX", 0x00ED, 1, 0, 0, 1)
276 MUX_CFG_24XX("AF12_2430_MCBSP5_FSX", 0x00ED, 1, 0, 0, 1)
277 MUX_CFG_24XX("K7_2430_MCBSP5_DX", 0x00EF, 1, 0, 0, 1)
278 MUX_CFG_24XX("M1_2430_MCBSP5_DR", 0x00F0, 1, 0, 0, 1)
279
280 /* 2430 MCSPI1 */
281 MUX_CFG_24XX("Y18_2430_MCSPI1_CLK", 0x010F, 0, 0, 0, 1)
282 MUX_CFG_24XX("AD15_2430_MCSPI1_SIMO", 0x0110, 0, 0, 0, 1)
283 MUX_CFG_24XX("AE17_2430_MCSPI1_SOMI", 0x0111, 0, 0, 0, 1)
284 MUX_CFG_24XX("U1_2430_MCSPI1_CS0", 0x0112, 0, 0, 0, 1)
285
286 /* Touchscreen GPIO */
287 MUX_CFG_24XX("AF19_2430_GPIO_85", 0x0113, 3, 0, 0, 1)
288
289 };
290
291 #define OMAP24XX_PINS_SZ ARRAY_SIZE(omap24xx_pins)
292
293 #if defined(CONFIG_OMAP_MUX_DEBUG) || defined(CONFIG_OMAP_MUX_WARNINGS)
294
295 static void __init_or_module omap2_cfg_debug(const struct pin_config *cfg, u16 reg)
296 {
297 u16 orig;
298 u8 warn = 0, debug = 0;
299
300 orig = omap_mux_read(cfg->mux_reg - OMAP_MUX_BASE_OFFSET);
301
302 #ifdef CONFIG_OMAP_MUX_DEBUG
303 debug = cfg->debug;
304 #endif
305 warn = (orig != reg);
306 if (debug || warn)
307 printk(KERN_WARNING
308 "MUX: setup %s (0x%p): 0x%04x -> 0x%04x\n",
309 cfg->name, omap_ctrl_base_get() + cfg->mux_reg,
310 orig, reg);
311 }
312 #else
313 #define omap2_cfg_debug(x, y) do {} while (0)
314 #endif
315
316 static int __init_or_module omap24xx_cfg_reg(const struct pin_config *cfg)
317 {
318 static DEFINE_SPINLOCK(mux_spin_lock);
319 unsigned long flags;
320 u8 reg = 0;
321
322 spin_lock_irqsave(&mux_spin_lock, flags);
323 reg |= cfg->mask & 0x7;
324 if (cfg->pull_val)
325 reg |= OMAP2_PULL_ENA;
326 if (cfg->pu_pd_val)
327 reg |= OMAP2_PULL_UP;
328 omap2_cfg_debug(cfg, reg);
329 omap_mux_write(reg, cfg->mux_reg - OMAP_MUX_BASE_OFFSET);
330 spin_unlock_irqrestore(&mux_spin_lock, flags);
331
332 return 0;
333 }
334
335 int __init omap2_mux_init(void)
336 {
337 u32 mux_pbase;
338
339 if (cpu_is_omap2420())
340 mux_pbase = OMAP2420_CTRL_BASE + OMAP_MUX_BASE_OFFSET;
341 else if (cpu_is_omap2430())
342 mux_pbase = OMAP243X_CTRL_BASE + OMAP_MUX_BASE_OFFSET;
343 else
344 return -ENODEV;
345
346 mux_base = ioremap(mux_pbase, OMAP_MUX_BASE_SZ);
347 if (!mux_base) {
348 printk(KERN_ERR "mux: Could not ioremap\n");
349 return -ENODEV;
350 }
351
352 if (cpu_is_omap24xx()) {
353 arch_mux_cfg.pins = omap24xx_pins;
354 arch_mux_cfg.size = OMAP24XX_PINS_SZ;
355 arch_mux_cfg.cfg_reg = omap24xx_cfg_reg;
356
357 return omap_mux_register(&arch_mux_cfg);
358 }
359
360 return 0;
361 }
362
363 #else
364 int __init omap2_mux_init(void)
365 {
366 return 0;
367 }
368 #endif /* CONFIG_OMAP_MUX */
369
370 /*----------------------------------------------------------------------------*/
371
372 #ifdef CONFIG_ARCH_OMAP3
373 static LIST_HEAD(muxmodes);
374 static DEFINE_MUTEX(muxmode_mutex);
375
376 #ifdef CONFIG_OMAP_MUX
377
378 static char *omap_mux_options;
379
380 int __init omap_mux_init_gpio(int gpio, int val)
381 {
382 struct omap_mux_entry *e;
383 int found = 0;
384
385 if (!gpio)
386 return -EINVAL;
387
388 list_for_each_entry(e, &muxmodes, node) {
389 struct omap_mux *m = &e->mux;
390 if (gpio == m->gpio) {
391 u16 old_mode;
392 u16 mux_mode;
393
394 old_mode = omap_mux_read(m->reg_offset);
395 mux_mode = val & ~(OMAP_MUX_NR_MODES - 1);
396 mux_mode |= OMAP_MUX_MODE4;
397 printk(KERN_DEBUG "mux: Setting signal "
398 "%s.gpio%i 0x%04x -> 0x%04x\n",
399 m->muxnames[0], gpio, old_mode, mux_mode);
400 omap_mux_write(mux_mode, m->reg_offset);
401 found++;
402 }
403 }
404
405 if (found == 1)
406 return 0;
407
408 if (found > 1) {
409 printk(KERN_ERR "mux: Multiple gpio paths for gpio%i\n", gpio);
410 return -EINVAL;
411 }
412
413 printk(KERN_ERR "mux: Could not set gpio%i\n", gpio);
414
415 return -ENODEV;
416 }
417
418 int __init omap_mux_init_signal(char *muxname, int val)
419 {
420 struct omap_mux_entry *e;
421 char *m0_name = NULL, *mode_name = NULL;
422 int found = 0;
423
424 mode_name = strchr(muxname, '.');
425 if (mode_name) {
426 *mode_name = '\0';
427 mode_name++;
428 m0_name = muxname;
429 } else {
430 mode_name = muxname;
431 }
432
433 list_for_each_entry(e, &muxmodes, node) {
434 struct omap_mux *m = &e->mux;
435 char *m0_entry = m->muxnames[0];
436 int i;
437
438 if (m0_name && strcmp(m0_name, m0_entry))
439 continue;
440
441 for (i = 0; i < OMAP_MUX_NR_MODES; i++) {
442 char *mode_cur = m->muxnames[i];
443
444 if (!mode_cur)
445 continue;
446
447 if (!strcmp(mode_name, mode_cur)) {
448 u16 old_mode;
449 u16 mux_mode;
450
451 old_mode = omap_mux_read(m->reg_offset);
452 mux_mode = val | i;
453 printk(KERN_DEBUG "mux: Setting signal "
454 "%s.%s 0x%04x -> 0x%04x\n",
455 m0_entry, muxname, old_mode, mux_mode);
456 omap_mux_write(mux_mode, m->reg_offset);
457 found++;
458 }
459 }
460 }
461
462 if (found == 1)
463 return 0;
464
465 if (found > 1) {
466 printk(KERN_ERR "mux: Multiple signal paths (%i) for %s\n",
467 found, muxname);
468 return -EINVAL;
469 }
470
471 printk(KERN_ERR "mux: Could not set signal %s\n", muxname);
472
473 return -ENODEV;
474 }
475
476 #ifdef CONFIG_DEBUG_FS
477
478 #define OMAP_MUX_MAX_NR_FLAGS 10
479 #define OMAP_MUX_TEST_FLAG(val, mask) \
480 if (((val) & (mask)) == (mask)) { \
481 i++; \
482 flags[i] = #mask; \
483 }
484
485 /* REVISIT: Add checking for non-optimal mux settings */
486 static inline void omap_mux_decode(struct seq_file *s, u16 val)
487 {
488 char *flags[OMAP_MUX_MAX_NR_FLAGS];
489 char mode[sizeof("OMAP_MUX_MODE") + 1];
490 int i = -1;
491
492 sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7);
493 i++;
494 flags[i] = mode;
495
496 OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE);
497 if (val & OMAP_OFF_EN) {
498 if (!(val & OMAP_OFFOUT_EN)) {
499 if (!(val & OMAP_OFF_PULL_UP)) {
500 OMAP_MUX_TEST_FLAG(val,
501 OMAP_PIN_OFF_INPUT_PULLDOWN);
502 } else {
503 OMAP_MUX_TEST_FLAG(val,
504 OMAP_PIN_OFF_INPUT_PULLUP);
505 }
506 } else {
507 if (!(val & OMAP_OFFOUT_VAL)) {
508 OMAP_MUX_TEST_FLAG(val,
509 OMAP_PIN_OFF_OUTPUT_LOW);
510 } else {
511 OMAP_MUX_TEST_FLAG(val,
512 OMAP_PIN_OFF_OUTPUT_HIGH);
513 }
514 }
515 }
516
517 if (val & OMAP_INPUT_EN) {
518 if (val & OMAP_PULL_ENA) {
519 if (!(val & OMAP_PULL_UP)) {
520 OMAP_MUX_TEST_FLAG(val,
521 OMAP_PIN_INPUT_PULLDOWN);
522 } else {
523 OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP);
524 }
525 } else {
526 OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT);
527 }
528 } else {
529 i++;
530 flags[i] = "OMAP_PIN_OUTPUT";
531 }
532
533 do {
534 seq_printf(s, "%s", flags[i]);
535 if (i > 0)
536 seq_printf(s, " | ");
537 } while (i-- > 0);
538 }
539
540 #define OMAP_MUX_DEFNAME_LEN 16
541
542 static int omap_mux_dbg_board_show(struct seq_file *s, void *unused)
543 {
544 struct omap_mux_entry *e;
545
546 list_for_each_entry(e, &muxmodes, node) {
547 struct omap_mux *m = &e->mux;
548 char m0_def[OMAP_MUX_DEFNAME_LEN];
549 char *m0_name = m->muxnames[0];
550 u16 val;
551 int i, mode;
552
553 if (!m0_name)
554 continue;
555
556 /* REVISIT: Needs to be updated if mode0 names get longer */
557 for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) {
558 if (m0_name[i] == '\0') {
559 m0_def[i] = m0_name[i];
560 break;
561 }
562 m0_def[i] = toupper(m0_name[i]);
563 }
564 val = omap_mux_read(m->reg_offset);
565 mode = val & OMAP_MUX_MODE7;
566
567 seq_printf(s, "OMAP%i_MUX(%s, ",
568 cpu_is_omap34xx() ? 3 : 0, m0_def);
569 omap_mux_decode(s, val);
570 seq_printf(s, "),\n");
571 }
572
573 return 0;
574 }
575
576 static int omap_mux_dbg_board_open(struct inode *inode, struct file *file)
577 {
578 return single_open(file, omap_mux_dbg_board_show, &inode->i_private);
579 }
580
581 static const struct file_operations omap_mux_dbg_board_fops = {
582 .open = omap_mux_dbg_board_open,
583 .read = seq_read,
584 .llseek = seq_lseek,
585 .release = single_release,
586 };
587
588 static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused)
589 {
590 struct omap_mux *m = s->private;
591 const char *none = "NA";
592 u16 val;
593 int mode;
594
595 val = omap_mux_read(m->reg_offset);
596 mode = val & OMAP_MUX_MODE7;
597
598 seq_printf(s, "name: %s.%s (0x%08lx/0x%03x = 0x%04x), b %s, t %s\n",
599 m->muxnames[0], m->muxnames[mode],
600 mux_phys + m->reg_offset, m->reg_offset, val,
601 m->balls[0] ? m->balls[0] : none,
602 m->balls[1] ? m->balls[1] : none);
603 seq_printf(s, "mode: ");
604 omap_mux_decode(s, val);
605 seq_printf(s, "\n");
606 seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n",
607 m->muxnames[0] ? m->muxnames[0] : none,
608 m->muxnames[1] ? m->muxnames[1] : none,
609 m->muxnames[2] ? m->muxnames[2] : none,
610 m->muxnames[3] ? m->muxnames[3] : none,
611 m->muxnames[4] ? m->muxnames[4] : none,
612 m->muxnames[5] ? m->muxnames[5] : none,
613 m->muxnames[6] ? m->muxnames[6] : none,
614 m->muxnames[7] ? m->muxnames[7] : none);
615
616 return 0;
617 }
618
619 #define OMAP_MUX_MAX_ARG_CHAR 7
620
621 static ssize_t omap_mux_dbg_signal_write(struct file *file,
622 const char __user *user_buf,
623 size_t count, loff_t *ppos)
624 {
625 char buf[OMAP_MUX_MAX_ARG_CHAR];
626 struct seq_file *seqf;
627 struct omap_mux *m;
628 unsigned long val;
629 int buf_size, ret;
630
631 if (count > OMAP_MUX_MAX_ARG_CHAR)
632 return -EINVAL;
633
634 memset(buf, 0, sizeof(buf));
635 buf_size = min(count, sizeof(buf) - 1);
636
637 if (copy_from_user(buf, user_buf, buf_size))
638 return -EFAULT;
639
640 ret = strict_strtoul(buf, 0x10, &val);
641 if (ret < 0)
642 return ret;
643
644 if (val > 0xffff)
645 return -EINVAL;
646
647 seqf = file->private_data;
648 m = seqf->private;
649
650 omap_mux_write((u16)val, m->reg_offset);
651 *ppos += count;
652
653 return count;
654 }
655
656 static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file)
657 {
658 return single_open(file, omap_mux_dbg_signal_show, inode->i_private);
659 }
660
661 static const struct file_operations omap_mux_dbg_signal_fops = {
662 .open = omap_mux_dbg_signal_open,
663 .read = seq_read,
664 .write = omap_mux_dbg_signal_write,
665 .llseek = seq_lseek,
666 .release = single_release,
667 };
668
669 static struct dentry *mux_dbg_dir;
670
671 static void __init omap_mux_dbg_init(void)
672 {
673 struct omap_mux_entry *e;
674
675 mux_dbg_dir = debugfs_create_dir("omap_mux", NULL);
676 if (!mux_dbg_dir)
677 return;
678
679 (void)debugfs_create_file("board", S_IRUGO, mux_dbg_dir,
680 NULL, &omap_mux_dbg_board_fops);
681
682 list_for_each_entry(e, &muxmodes, node) {
683 struct omap_mux *m = &e->mux;
684
685 (void)debugfs_create_file(m->muxnames[0], S_IWUGO, mux_dbg_dir,
686 m, &omap_mux_dbg_signal_fops);
687 }
688 }
689
690 #else
691 static inline void omap_mux_dbg_init(void)
692 {
693 }
694 #endif /* CONFIG_DEBUG_FS */
695
696 static void __init omap_mux_free_names(struct omap_mux *m)
697 {
698 int i;
699
700 for (i = 0; i < OMAP_MUX_NR_MODES; i++)
701 kfree(m->muxnames[i]);
702
703 #ifdef CONFIG_DEBUG_FS
704 for (i = 0; i < OMAP_MUX_NR_SIDES; i++)
705 kfree(m->balls[i]);
706 #endif
707
708 }
709
710 /* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */
711 static int __init omap_mux_late_init(void)
712 {
713 struct omap_mux_entry *e, *tmp;
714
715 list_for_each_entry_safe(e, tmp, &muxmodes, node) {
716 struct omap_mux *m = &e->mux;
717 u16 mode = omap_mux_read(m->reg_offset);
718
719 if (OMAP_MODE_GPIO(mode))
720 continue;
721
722 #ifndef CONFIG_DEBUG_FS
723 mutex_lock(&muxmode_mutex);
724 list_del(&e->node);
725 mutex_unlock(&muxmode_mutex);
726 omap_mux_free_names(m);
727 kfree(m);
728 #endif
729
730 }
731
732 omap_mux_dbg_init();
733
734 return 0;
735 }
736 late_initcall(omap_mux_late_init);
737
738 static void __init omap_mux_package_fixup(struct omap_mux *p,
739 struct omap_mux *superset)
740 {
741 while (p->reg_offset != OMAP_MUX_TERMINATOR) {
742 struct omap_mux *s = superset;
743 int found = 0;
744
745 while (s->reg_offset != OMAP_MUX_TERMINATOR) {
746 if (s->reg_offset == p->reg_offset) {
747 *s = *p;
748 found++;
749 break;
750 }
751 s++;
752 }
753 if (!found)
754 printk(KERN_ERR "mux: Unknown entry offset 0x%x\n",
755 p->reg_offset);
756 p++;
757 }
758 }
759
760 #ifdef CONFIG_DEBUG_FS
761
762 static void __init omap_mux_package_init_balls(struct omap_ball *b,
763 struct omap_mux *superset)
764 {
765 while (b->reg_offset != OMAP_MUX_TERMINATOR) {
766 struct omap_mux *s = superset;
767 int found = 0;
768
769 while (s->reg_offset != OMAP_MUX_TERMINATOR) {
770 if (s->reg_offset == b->reg_offset) {
771 s->balls[0] = b->balls[0];
772 s->balls[1] = b->balls[1];
773 found++;
774 break;
775 }
776 s++;
777 }
778 if (!found)
779 printk(KERN_ERR "mux: Unknown ball offset 0x%x\n",
780 b->reg_offset);
781 b++;
782 }
783 }
784
785 #else /* CONFIG_DEBUG_FS */
786
787 static inline void omap_mux_package_init_balls(struct omap_ball *b,
788 struct omap_mux *superset)
789 {
790 }
791
792 #endif /* CONFIG_DEBUG_FS */
793
794 static int __init omap_mux_setup(char *options)
795 {
796 if (!options)
797 return 0;
798
799 omap_mux_options = options;
800
801 return 1;
802 }
803 __setup("omap_mux=", omap_mux_setup);
804
805 /*
806 * Note that the omap_mux=some.signal1=0x1234,some.signal2=0x1234
807 * cmdline options only override the bootloader values.
808 * During development, please enable CONFIG_DEBUG_FS, and use the
809 * signal specific entries under debugfs.
810 */
811 static void __init omap_mux_set_cmdline_signals(void)
812 {
813 char *options, *next_opt, *token;
814
815 if (!omap_mux_options)
816 return;
817
818 options = kmalloc(strlen(omap_mux_options) + 1, GFP_KERNEL);
819 if (!options)
820 return;
821
822 strcpy(options, omap_mux_options);
823 next_opt = options;
824
825 while ((token = strsep(&next_opt, ",")) != NULL) {
826 char *keyval, *name;
827 unsigned long val;
828
829 keyval = token;
830 name = strsep(&keyval, "=");
831 if (name) {
832 int res;
833
834 res = strict_strtoul(keyval, 0x10, &val);
835 if (res < 0)
836 continue;
837
838 omap_mux_init_signal(name, (u16)val);
839 }
840 }
841
842 kfree(options);
843 }
844
845 static int __init omap_mux_copy_names(struct omap_mux *src,
846 struct omap_mux *dst)
847 {
848 int i;
849
850 for (i = 0; i < OMAP_MUX_NR_MODES; i++) {
851 if (src->muxnames[i]) {
852 dst->muxnames[i] =
853 kmalloc(strlen(src->muxnames[i]) + 1,
854 GFP_KERNEL);
855 if (!dst->muxnames[i])
856 goto free;
857 strcpy(dst->muxnames[i], src->muxnames[i]);
858 }
859 }
860
861 #ifdef CONFIG_DEBUG_FS
862 for (i = 0; i < OMAP_MUX_NR_SIDES; i++) {
863 if (src->balls[i]) {
864 dst->balls[i] =
865 kmalloc(strlen(src->balls[i]) + 1,
866 GFP_KERNEL);
867 if (!dst->balls[i])
868 goto free;
869 strcpy(dst->balls[i], src->balls[i]);
870 }
871 }
872 #endif
873
874 return 0;
875
876 free:
877 omap_mux_free_names(dst);
878 return -ENOMEM;
879
880 }
881
882 #endif /* CONFIG_OMAP_MUX */
883
884 static u16 omap_mux_get_by_gpio(int gpio)
885 {
886 struct omap_mux_entry *e;
887 u16 offset = OMAP_MUX_TERMINATOR;
888
889 list_for_each_entry(e, &muxmodes, node) {
890 struct omap_mux *m = &e->mux;
891 if (m->gpio == gpio) {
892 offset = m->reg_offset;
893 break;
894 }
895 }
896
897 return offset;
898 }
899
900 /* Needed for dynamic muxing of GPIO pins for off-idle */
901 u16 omap_mux_get_gpio(int gpio)
902 {
903 u16 offset;
904
905 offset = omap_mux_get_by_gpio(gpio);
906 if (offset == OMAP_MUX_TERMINATOR) {
907 printk(KERN_ERR "mux: Could not get gpio%i\n", gpio);
908 return offset;
909 }
910
911 return omap_mux_read(offset);
912 }
913
914 /* Needed for dynamic muxing of GPIO pins for off-idle */
915 void omap_mux_set_gpio(u16 val, int gpio)
916 {
917 u16 offset;
918
919 offset = omap_mux_get_by_gpio(gpio);
920 if (offset == OMAP_MUX_TERMINATOR) {
921 printk(KERN_ERR "mux: Could not set gpio%i\n", gpio);
922 return;
923 }
924
925 omap_mux_write(val, offset);
926 }
927
928 static struct omap_mux * __init omap_mux_list_add(struct omap_mux *src)
929 {
930 struct omap_mux_entry *entry;
931 struct omap_mux *m;
932
933 entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL);
934 if (!entry)
935 return NULL;
936
937 m = &entry->mux;
938 memcpy(m, src, sizeof(struct omap_mux_entry));
939
940 #ifdef CONFIG_OMAP_MUX
941 if (omap_mux_copy_names(src, m)) {
942 kfree(entry);
943 return NULL;
944 }
945 #endif
946
947 mutex_lock(&muxmode_mutex);
948 list_add_tail(&entry->node, &muxmodes);
949 mutex_unlock(&muxmode_mutex);
950
951 return m;
952 }
953
954 /*
955 * Note if CONFIG_OMAP_MUX is not selected, we will only initialize
956 * the GPIO to mux offset mapping that is needed for dynamic muxing
957 * of GPIO pins for off-idle.
958 */
959 static void __init omap_mux_init_list(struct omap_mux *superset)
960 {
961 while (superset->reg_offset != OMAP_MUX_TERMINATOR) {
962 struct omap_mux *entry;
963
964 #ifdef CONFIG_OMAP_MUX
965 if (!superset->muxnames || !superset->muxnames[0]) {
966 superset++;
967 continue;
968 }
969 #else
970 /* Skip pins that are not muxed as GPIO by bootloader */
971 if (!OMAP_MODE_GPIO(omap_mux_read(superset->reg_offset))) {
972 superset++;
973 continue;
974 }
975 #endif
976
977 entry = omap_mux_list_add(superset);
978 if (!entry) {
979 printk(KERN_ERR "mux: Could not add entry\n");
980 return;
981 }
982 superset++;
983 }
984 }
985
986 #ifdef CONFIG_OMAP_MUX
987
988 static void omap_mux_init_package(struct omap_mux *superset,
989 struct omap_mux *package_subset,
990 struct omap_ball *package_balls)
991 {
992 if (package_subset)
993 omap_mux_package_fixup(package_subset, superset);
994 if (package_balls)
995 omap_mux_package_init_balls(package_balls, superset);
996 }
997
998 static void omap_mux_init_signals(struct omap_board_mux *board_mux)
999 {
1000 omap_mux_set_cmdline_signals();
1001 omap_mux_write_array(board_mux);
1002 }
1003
1004 #else
1005
1006 static void omap_mux_init_package(struct omap_mux *superset,
1007 struct omap_mux *package_subset,
1008 struct omap_ball *package_balls)
1009 {
1010 }
1011
1012 static void omap_mux_init_signals(struct omap_board_mux *board_mux)
1013 {
1014 }
1015
1016 #endif
1017
1018 int __init omap_mux_init(u32 mux_pbase, u32 mux_size,
1019 struct omap_mux *superset,
1020 struct omap_mux *package_subset,
1021 struct omap_board_mux *board_mux,
1022 struct omap_ball *package_balls)
1023 {
1024 if (mux_base)
1025 return -EBUSY;
1026
1027 mux_phys = mux_pbase;
1028 mux_base = ioremap(mux_pbase, mux_size);
1029 if (!mux_base) {
1030 printk(KERN_ERR "mux: Could not ioremap\n");
1031 return -ENODEV;
1032 }
1033
1034 omap_mux_init_package(superset, package_subset, package_balls);
1035 omap_mux_init_list(superset);
1036 omap_mux_init_signals(board_mux);
1037
1038 return 0;
1039 }
1040
1041 #endif /* CONFIG_ARCH_OMAP3 */
1042
Linux kernel - Deliverables
This page took 0.092608 seconds and 5 git commands to generate.