Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-omap2/mux.c |
| 3 | * |
Vikram Pandita | 2351872 | 2008-10-06 15:49:16 +0300 | [diff] [blame] | 4 | * OMAP2 and OMAP3 pin multiplexing configurations |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 5 | * |
Tony Lindgren | 9330899 | 2008-01-24 17:24:15 -0800 | [diff] [blame] | 6 | * Copyright (C) 2004 - 2008 Texas Instruments Inc. |
| 7 | * Copyright (C) 2003 - 2008 Nokia Corporation |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 8 | * |
Tony Lindgren | 9330899 | 2008-01-24 17:24:15 -0800 | [diff] [blame] | 9 | * Written by Tony Lindgren |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 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 | */ |
Paul Walmsley | 4814ced | 2010-10-08 11:40:20 -0600 | [diff] [blame] | 26 | #include <linux/kernel.h> |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 27 | #include <linux/init.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 28 | #include <linux/io.h> |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 29 | #include <linux/list.h> |
Paul Walmsley | 4814ced | 2010-10-08 11:40:20 -0600 | [diff] [blame] | 30 | #include <linux/slab.h> |
Tony Lindgren | 4b715ef | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 31 | #include <linux/ctype.h> |
| 32 | #include <linux/debugfs.h> |
| 33 | #include <linux/seq_file.h> |
| 34 | #include <linux/uaccess.h> |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 35 | |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 36 | #include <asm/system.h> |
| 37 | |
Paul Walmsley | 4814ced | 2010-10-08 11:40:20 -0600 | [diff] [blame] | 38 | #include "control.h" |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 39 | #include "mux.h" |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 40 | |
Mike Rapoport | 92c9f50 | 2009-12-11 16:16:31 -0800 | [diff] [blame] | 41 | #define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */ |
| 42 | #define OMAP_MUX_BASE_SZ 0x5ca |
Tony Lindgren | d5425be | 2010-07-05 16:31:35 +0300 | [diff] [blame] | 43 | #define MUXABLE_GPIO_MODE3 BIT(0) |
Mike Rapoport | 92c9f50 | 2009-12-11 16:16:31 -0800 | [diff] [blame] | 44 | |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 45 | struct omap_mux_entry { |
| 46 | struct omap_mux mux; |
| 47 | struct list_head node; |
| 48 | }; |
| 49 | |
Tony Lindgren | 4b715ef | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 50 | static unsigned long mux_phys; |
Mike Rapoport | 92c9f50 | 2009-12-11 16:16:31 -0800 | [diff] [blame] | 51 | static void __iomem *mux_base; |
Tony Lindgren | d5425be | 2010-07-05 16:31:35 +0300 | [diff] [blame] | 52 | static u8 omap_mux_flags; |
Mike Rapoport | 92c9f50 | 2009-12-11 16:16:31 -0800 | [diff] [blame] | 53 | |
Tony Lindgren | d4bb72e | 2010-01-19 15:15:24 -0800 | [diff] [blame] | 54 | u16 omap_mux_read(u16 reg) |
Mike Rapoport | 92c9f50 | 2009-12-11 16:16:31 -0800 | [diff] [blame] | 55 | { |
| 56 | if (cpu_is_omap24xx()) |
| 57 | return __raw_readb(mux_base + reg); |
| 58 | else |
| 59 | return __raw_readw(mux_base + reg); |
| 60 | } |
| 61 | |
Tony Lindgren | d4bb72e | 2010-01-19 15:15:24 -0800 | [diff] [blame] | 62 | void omap_mux_write(u16 val, u16 reg) |
Mike Rapoport | 92c9f50 | 2009-12-11 16:16:31 -0800 | [diff] [blame] | 63 | { |
| 64 | if (cpu_is_omap24xx()) |
| 65 | __raw_writeb(val, mux_base + reg); |
| 66 | else |
| 67 | __raw_writew(val, mux_base + reg); |
| 68 | } |
Tony Lindgren | 7d7f665 | 2008-01-25 00:42:48 -0800 | [diff] [blame] | 69 | |
Tony Lindgren | d4bb72e | 2010-01-19 15:15:24 -0800 | [diff] [blame] | 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 | |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 78 | static LIST_HEAD(muxmodes); |
| 79 | static DEFINE_MUTEX(muxmode_mutex); |
| 80 | |
| 81 | #ifdef CONFIG_OMAP_MUX |
| 82 | |
| 83 | static char *omap_mux_options; |
| 84 | |
| 85 | int __init omap_mux_init_gpio(int gpio, int val) |
| 86 | { |
| 87 | struct omap_mux_entry *e; |
Sanjeev Premi | ca82876 | 2010-09-23 18:27:18 -0700 | [diff] [blame] | 88 | struct omap_mux *gpio_mux = NULL; |
Grazvydas Ignotas | 8a6f7e1 | 2010-08-02 13:18:28 +0300 | [diff] [blame] | 89 | u16 old_mode; |
| 90 | u16 mux_mode; |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 91 | int found = 0; |
| 92 | |
| 93 | if (!gpio) |
| 94 | return -EINVAL; |
| 95 | |
| 96 | list_for_each_entry(e, &muxmodes, node) { |
| 97 | struct omap_mux *m = &e->mux; |
| 98 | if (gpio == m->gpio) { |
Grazvydas Ignotas | 8a6f7e1 | 2010-08-02 13:18:28 +0300 | [diff] [blame] | 99 | gpio_mux = m; |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 100 | found++; |
| 101 | } |
| 102 | } |
| 103 | |
Grazvydas Ignotas | 8a6f7e1 | 2010-08-02 13:18:28 +0300 | [diff] [blame] | 104 | if (found == 0) { |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 105 | pr_err("mux: Could not set gpio%i\n", gpio); |
Grazvydas Ignotas | 8a6f7e1 | 2010-08-02 13:18:28 +0300 | [diff] [blame] | 106 | return -ENODEV; |
| 107 | } |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 108 | |
| 109 | if (found > 1) { |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 110 | pr_info("mux: Multiple gpio paths (%d) for gpio%i\n", |
| 111 | found, gpio); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 112 | return -EINVAL; |
| 113 | } |
| 114 | |
Grazvydas Ignotas | 8a6f7e1 | 2010-08-02 13:18:28 +0300 | [diff] [blame] | 115 | old_mode = omap_mux_read(gpio_mux->reg_offset); |
| 116 | mux_mode = val & ~(OMAP_MUX_NR_MODES - 1); |
| 117 | if (omap_mux_flags & MUXABLE_GPIO_MODE3) |
| 118 | mux_mode |= OMAP_MUX_MODE3; |
| 119 | else |
| 120 | mux_mode |= OMAP_MUX_MODE4; |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 121 | pr_debug("mux: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", |
| 122 | gpio_mux->muxnames[0], gpio, old_mode, mux_mode); |
Grazvydas Ignotas | 8a6f7e1 | 2010-08-02 13:18:28 +0300 | [diff] [blame] | 123 | omap_mux_write(mux_mode, gpio_mux->reg_offset); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 124 | |
Grazvydas Ignotas | 8a6f7e1 | 2010-08-02 13:18:28 +0300 | [diff] [blame] | 125 | return 0; |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 126 | } |
| 127 | |
Tony Lindgren | 5a3b2f7 | 2010-10-01 16:35:24 -0700 | [diff] [blame] | 128 | int __init omap_mux_init_signal(const char *muxname, int val) |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 129 | { |
| 130 | struct omap_mux_entry *e; |
Tony Lindgren | 5a3b2f7 | 2010-10-01 16:35:24 -0700 | [diff] [blame] | 131 | const char *mode_name; |
| 132 | int found = 0, mode0_len = 0; |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 133 | |
| 134 | mode_name = strchr(muxname, '.'); |
| 135 | if (mode_name) { |
Tony Lindgren | 5a3b2f7 | 2010-10-01 16:35:24 -0700 | [diff] [blame] | 136 | mode0_len = strlen(muxname) - strlen(mode_name); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 137 | mode_name++; |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 138 | } else { |
| 139 | mode_name = muxname; |
| 140 | } |
| 141 | |
| 142 | list_for_each_entry(e, &muxmodes, node) { |
| 143 | struct omap_mux *m = &e->mux; |
| 144 | char *m0_entry = m->muxnames[0]; |
| 145 | int i; |
| 146 | |
Tony Lindgren | 5a3b2f7 | 2010-10-01 16:35:24 -0700 | [diff] [blame] | 147 | /* First check for full name in mode0.muxmode format */ |
| 148 | if (mode0_len && strncmp(muxname, m0_entry, mode0_len)) |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 149 | continue; |
| 150 | |
Tony Lindgren | 5a3b2f7 | 2010-10-01 16:35:24 -0700 | [diff] [blame] | 151 | /* Then check for muxmode only */ |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 152 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { |
| 153 | char *mode_cur = m->muxnames[i]; |
| 154 | |
| 155 | if (!mode_cur) |
| 156 | continue; |
| 157 | |
| 158 | if (!strcmp(mode_name, mode_cur)) { |
| 159 | u16 old_mode; |
| 160 | u16 mux_mode; |
| 161 | |
| 162 | old_mode = omap_mux_read(m->reg_offset); |
| 163 | mux_mode = val | i; |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 164 | pr_debug("mux: Setting signal " |
| 165 | "%s.%s 0x%04x -> 0x%04x\n", |
| 166 | m0_entry, muxname, old_mode, mux_mode); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 167 | omap_mux_write(mux_mode, m->reg_offset); |
| 168 | found++; |
| 169 | } |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | if (found == 1) |
| 174 | return 0; |
| 175 | |
| 176 | if (found > 1) { |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 177 | pr_err("mux: Multiple signal paths (%i) for %s\n", |
| 178 | found, muxname); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 179 | return -EINVAL; |
| 180 | } |
| 181 | |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 182 | pr_err("mux: Could not set signal %s\n", muxname); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 183 | |
| 184 | return -ENODEV; |
| 185 | } |
| 186 | |
Tony Lindgren | 4b715ef | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 187 | #ifdef CONFIG_DEBUG_FS |
| 188 | |
| 189 | #define OMAP_MUX_MAX_NR_FLAGS 10 |
| 190 | #define OMAP_MUX_TEST_FLAG(val, mask) \ |
| 191 | if (((val) & (mask)) == (mask)) { \ |
| 192 | i++; \ |
| 193 | flags[i] = #mask; \ |
| 194 | } |
| 195 | |
| 196 | /* REVISIT: Add checking for non-optimal mux settings */ |
| 197 | static inline void omap_mux_decode(struct seq_file *s, u16 val) |
| 198 | { |
| 199 | char *flags[OMAP_MUX_MAX_NR_FLAGS]; |
Tony Lindgren | 78737ae | 2010-02-01 13:03:42 -0800 | [diff] [blame] | 200 | char mode[sizeof("OMAP_MUX_MODE") + 1]; |
Tony Lindgren | 4b715ef | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 201 | int i = -1; |
| 202 | |
| 203 | sprintf(mode, "OMAP_MUX_MODE%d", val & 0x7); |
| 204 | i++; |
| 205 | flags[i] = mode; |
| 206 | |
| 207 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_OFF_WAKEUPENABLE); |
| 208 | if (val & OMAP_OFF_EN) { |
| 209 | if (!(val & OMAP_OFFOUT_EN)) { |
| 210 | if (!(val & OMAP_OFF_PULL_UP)) { |
| 211 | OMAP_MUX_TEST_FLAG(val, |
| 212 | OMAP_PIN_OFF_INPUT_PULLDOWN); |
| 213 | } else { |
| 214 | OMAP_MUX_TEST_FLAG(val, |
| 215 | OMAP_PIN_OFF_INPUT_PULLUP); |
| 216 | } |
| 217 | } else { |
| 218 | if (!(val & OMAP_OFFOUT_VAL)) { |
| 219 | OMAP_MUX_TEST_FLAG(val, |
| 220 | OMAP_PIN_OFF_OUTPUT_LOW); |
| 221 | } else { |
| 222 | OMAP_MUX_TEST_FLAG(val, |
| 223 | OMAP_PIN_OFF_OUTPUT_HIGH); |
| 224 | } |
| 225 | } |
| 226 | } |
| 227 | |
| 228 | if (val & OMAP_INPUT_EN) { |
| 229 | if (val & OMAP_PULL_ENA) { |
| 230 | if (!(val & OMAP_PULL_UP)) { |
| 231 | OMAP_MUX_TEST_FLAG(val, |
| 232 | OMAP_PIN_INPUT_PULLDOWN); |
| 233 | } else { |
| 234 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT_PULLUP); |
| 235 | } |
| 236 | } else { |
| 237 | OMAP_MUX_TEST_FLAG(val, OMAP_PIN_INPUT); |
| 238 | } |
| 239 | } else { |
| 240 | i++; |
| 241 | flags[i] = "OMAP_PIN_OUTPUT"; |
| 242 | } |
| 243 | |
| 244 | do { |
| 245 | seq_printf(s, "%s", flags[i]); |
| 246 | if (i > 0) |
| 247 | seq_printf(s, " | "); |
| 248 | } while (i-- > 0); |
| 249 | } |
| 250 | |
| 251 | #define OMAP_MUX_DEFNAME_LEN 16 |
| 252 | |
| 253 | static int omap_mux_dbg_board_show(struct seq_file *s, void *unused) |
| 254 | { |
| 255 | struct omap_mux_entry *e; |
| 256 | |
| 257 | list_for_each_entry(e, &muxmodes, node) { |
| 258 | struct omap_mux *m = &e->mux; |
| 259 | char m0_def[OMAP_MUX_DEFNAME_LEN]; |
| 260 | char *m0_name = m->muxnames[0]; |
| 261 | u16 val; |
| 262 | int i, mode; |
| 263 | |
| 264 | if (!m0_name) |
| 265 | continue; |
| 266 | |
Tony Lindgren | 78737ae | 2010-02-01 13:03:42 -0800 | [diff] [blame] | 267 | /* REVISIT: Needs to be updated if mode0 names get longer */ |
Tony Lindgren | 4b715ef | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 268 | for (i = 0; i < OMAP_MUX_DEFNAME_LEN; i++) { |
| 269 | if (m0_name[i] == '\0') { |
| 270 | m0_def[i] = m0_name[i]; |
| 271 | break; |
| 272 | } |
| 273 | m0_def[i] = toupper(m0_name[i]); |
| 274 | } |
| 275 | val = omap_mux_read(m->reg_offset); |
| 276 | mode = val & OMAP_MUX_MODE7; |
| 277 | |
| 278 | seq_printf(s, "OMAP%i_MUX(%s, ", |
| 279 | cpu_is_omap34xx() ? 3 : 0, m0_def); |
| 280 | omap_mux_decode(s, val); |
| 281 | seq_printf(s, "),\n"); |
| 282 | } |
| 283 | |
| 284 | return 0; |
| 285 | } |
| 286 | |
| 287 | static int omap_mux_dbg_board_open(struct inode *inode, struct file *file) |
| 288 | { |
| 289 | return single_open(file, omap_mux_dbg_board_show, &inode->i_private); |
| 290 | } |
| 291 | |
| 292 | static const struct file_operations omap_mux_dbg_board_fops = { |
| 293 | .open = omap_mux_dbg_board_open, |
| 294 | .read = seq_read, |
| 295 | .llseek = seq_lseek, |
| 296 | .release = single_release, |
| 297 | }; |
| 298 | |
| 299 | static int omap_mux_dbg_signal_show(struct seq_file *s, void *unused) |
| 300 | { |
| 301 | struct omap_mux *m = s->private; |
| 302 | const char *none = "NA"; |
| 303 | u16 val; |
| 304 | int mode; |
| 305 | |
| 306 | val = omap_mux_read(m->reg_offset); |
| 307 | mode = val & OMAP_MUX_MODE7; |
| 308 | |
| 309 | seq_printf(s, "name: %s.%s (0x%08lx/0x%03x = 0x%04x), b %s, t %s\n", |
| 310 | m->muxnames[0], m->muxnames[mode], |
| 311 | mux_phys + m->reg_offset, m->reg_offset, val, |
| 312 | m->balls[0] ? m->balls[0] : none, |
| 313 | m->balls[1] ? m->balls[1] : none); |
| 314 | seq_printf(s, "mode: "); |
| 315 | omap_mux_decode(s, val); |
| 316 | seq_printf(s, "\n"); |
| 317 | seq_printf(s, "signals: %s | %s | %s | %s | %s | %s | %s | %s\n", |
| 318 | m->muxnames[0] ? m->muxnames[0] : none, |
| 319 | m->muxnames[1] ? m->muxnames[1] : none, |
| 320 | m->muxnames[2] ? m->muxnames[2] : none, |
| 321 | m->muxnames[3] ? m->muxnames[3] : none, |
| 322 | m->muxnames[4] ? m->muxnames[4] : none, |
| 323 | m->muxnames[5] ? m->muxnames[5] : none, |
| 324 | m->muxnames[6] ? m->muxnames[6] : none, |
| 325 | m->muxnames[7] ? m->muxnames[7] : none); |
| 326 | |
| 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | #define OMAP_MUX_MAX_ARG_CHAR 7 |
| 331 | |
| 332 | static ssize_t omap_mux_dbg_signal_write(struct file *file, |
| 333 | const char __user *user_buf, |
| 334 | size_t count, loff_t *ppos) |
| 335 | { |
| 336 | char buf[OMAP_MUX_MAX_ARG_CHAR]; |
| 337 | struct seq_file *seqf; |
| 338 | struct omap_mux *m; |
| 339 | unsigned long val; |
| 340 | int buf_size, ret; |
| 341 | |
| 342 | if (count > OMAP_MUX_MAX_ARG_CHAR) |
| 343 | return -EINVAL; |
| 344 | |
| 345 | memset(buf, 0, sizeof(buf)); |
| 346 | buf_size = min(count, sizeof(buf) - 1); |
| 347 | |
| 348 | if (copy_from_user(buf, user_buf, buf_size)) |
| 349 | return -EFAULT; |
| 350 | |
| 351 | ret = strict_strtoul(buf, 0x10, &val); |
| 352 | if (ret < 0) |
| 353 | return ret; |
| 354 | |
| 355 | if (val > 0xffff) |
| 356 | return -EINVAL; |
| 357 | |
| 358 | seqf = file->private_data; |
| 359 | m = seqf->private; |
| 360 | |
| 361 | omap_mux_write((u16)val, m->reg_offset); |
| 362 | *ppos += count; |
| 363 | |
| 364 | return count; |
| 365 | } |
| 366 | |
| 367 | static int omap_mux_dbg_signal_open(struct inode *inode, struct file *file) |
| 368 | { |
| 369 | return single_open(file, omap_mux_dbg_signal_show, inode->i_private); |
| 370 | } |
| 371 | |
| 372 | static const struct file_operations omap_mux_dbg_signal_fops = { |
| 373 | .open = omap_mux_dbg_signal_open, |
| 374 | .read = seq_read, |
| 375 | .write = omap_mux_dbg_signal_write, |
| 376 | .llseek = seq_lseek, |
| 377 | .release = single_release, |
| 378 | }; |
| 379 | |
| 380 | static struct dentry *mux_dbg_dir; |
| 381 | |
| 382 | static void __init omap_mux_dbg_init(void) |
| 383 | { |
| 384 | struct omap_mux_entry *e; |
| 385 | |
| 386 | mux_dbg_dir = debugfs_create_dir("omap_mux", NULL); |
| 387 | if (!mux_dbg_dir) |
| 388 | return; |
| 389 | |
| 390 | (void)debugfs_create_file("board", S_IRUGO, mux_dbg_dir, |
| 391 | NULL, &omap_mux_dbg_board_fops); |
| 392 | |
| 393 | list_for_each_entry(e, &muxmodes, node) { |
| 394 | struct omap_mux *m = &e->mux; |
| 395 | |
| 396 | (void)debugfs_create_file(m->muxnames[0], S_IWUGO, mux_dbg_dir, |
| 397 | m, &omap_mux_dbg_signal_fops); |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | #else |
| 402 | static inline void omap_mux_dbg_init(void) |
| 403 | { |
| 404 | } |
| 405 | #endif /* CONFIG_DEBUG_FS */ |
| 406 | |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 407 | static void __init omap_mux_free_names(struct omap_mux *m) |
| 408 | { |
| 409 | int i; |
| 410 | |
| 411 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) |
| 412 | kfree(m->muxnames[i]); |
| 413 | |
| 414 | #ifdef CONFIG_DEBUG_FS |
| 415 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) |
| 416 | kfree(m->balls[i]); |
Tony Lindgren | 1dbae81 | 2005-11-10 14:26:51 +0000 | [diff] [blame] | 417 | #endif |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 418 | |
| 419 | } |
| 420 | |
| 421 | /* Free all data except for GPIO pins unless CONFIG_DEBUG_FS is set */ |
| 422 | static int __init omap_mux_late_init(void) |
| 423 | { |
| 424 | struct omap_mux_entry *e, *tmp; |
| 425 | |
| 426 | list_for_each_entry_safe(e, tmp, &muxmodes, node) { |
| 427 | struct omap_mux *m = &e->mux; |
| 428 | u16 mode = omap_mux_read(m->reg_offset); |
| 429 | |
| 430 | if (OMAP_MODE_GPIO(mode)) |
| 431 | continue; |
| 432 | |
| 433 | #ifndef CONFIG_DEBUG_FS |
| 434 | mutex_lock(&muxmode_mutex); |
| 435 | list_del(&e->node); |
| 436 | mutex_unlock(&muxmode_mutex); |
| 437 | omap_mux_free_names(m); |
| 438 | kfree(m); |
| 439 | #endif |
| 440 | |
| 441 | } |
| 442 | |
Tony Lindgren | 4b715ef | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 443 | omap_mux_dbg_init(); |
| 444 | |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 445 | return 0; |
| 446 | } |
| 447 | late_initcall(omap_mux_late_init); |
| 448 | |
| 449 | static void __init omap_mux_package_fixup(struct omap_mux *p, |
| 450 | struct omap_mux *superset) |
| 451 | { |
| 452 | while (p->reg_offset != OMAP_MUX_TERMINATOR) { |
| 453 | struct omap_mux *s = superset; |
| 454 | int found = 0; |
| 455 | |
| 456 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { |
| 457 | if (s->reg_offset == p->reg_offset) { |
| 458 | *s = *p; |
| 459 | found++; |
| 460 | break; |
| 461 | } |
| 462 | s++; |
| 463 | } |
| 464 | if (!found) |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 465 | pr_err("mux: Unknown entry offset 0x%x\n", |
| 466 | p->reg_offset); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 467 | p++; |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | #ifdef CONFIG_DEBUG_FS |
| 472 | |
| 473 | static void __init omap_mux_package_init_balls(struct omap_ball *b, |
| 474 | struct omap_mux *superset) |
| 475 | { |
| 476 | while (b->reg_offset != OMAP_MUX_TERMINATOR) { |
| 477 | struct omap_mux *s = superset; |
| 478 | int found = 0; |
| 479 | |
| 480 | while (s->reg_offset != OMAP_MUX_TERMINATOR) { |
| 481 | if (s->reg_offset == b->reg_offset) { |
| 482 | s->balls[0] = b->balls[0]; |
| 483 | s->balls[1] = b->balls[1]; |
| 484 | found++; |
| 485 | break; |
| 486 | } |
| 487 | s++; |
| 488 | } |
| 489 | if (!found) |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 490 | pr_err("mux: Unknown ball offset 0x%x\n", |
| 491 | b->reg_offset); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 492 | b++; |
| 493 | } |
| 494 | } |
| 495 | |
| 496 | #else /* CONFIG_DEBUG_FS */ |
| 497 | |
| 498 | static inline void omap_mux_package_init_balls(struct omap_ball *b, |
| 499 | struct omap_mux *superset) |
| 500 | { |
| 501 | } |
| 502 | |
| 503 | #endif /* CONFIG_DEBUG_FS */ |
| 504 | |
| 505 | static int __init omap_mux_setup(char *options) |
| 506 | { |
| 507 | if (!options) |
| 508 | return 0; |
| 509 | |
| 510 | omap_mux_options = options; |
| 511 | |
| 512 | return 1; |
| 513 | } |
| 514 | __setup("omap_mux=", omap_mux_setup); |
| 515 | |
| 516 | /* |
| 517 | * Note that the omap_mux=some.signal1=0x1234,some.signal2=0x1234 |
| 518 | * cmdline options only override the bootloader values. |
| 519 | * During development, please enable CONFIG_DEBUG_FS, and use the |
| 520 | * signal specific entries under debugfs. |
| 521 | */ |
| 522 | static void __init omap_mux_set_cmdline_signals(void) |
| 523 | { |
| 524 | char *options, *next_opt, *token; |
| 525 | |
| 526 | if (!omap_mux_options) |
| 527 | return; |
| 528 | |
| 529 | options = kmalloc(strlen(omap_mux_options) + 1, GFP_KERNEL); |
| 530 | if (!options) |
| 531 | return; |
| 532 | |
| 533 | strcpy(options, omap_mux_options); |
| 534 | next_opt = options; |
| 535 | |
| 536 | while ((token = strsep(&next_opt, ",")) != NULL) { |
| 537 | char *keyval, *name; |
| 538 | unsigned long val; |
| 539 | |
| 540 | keyval = token; |
| 541 | name = strsep(&keyval, "="); |
| 542 | if (name) { |
| 543 | int res; |
| 544 | |
| 545 | res = strict_strtoul(keyval, 0x10, &val); |
| 546 | if (res < 0) |
| 547 | continue; |
| 548 | |
| 549 | omap_mux_init_signal(name, (u16)val); |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | kfree(options); |
| 554 | } |
| 555 | |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 556 | static int __init omap_mux_copy_names(struct omap_mux *src, |
| 557 | struct omap_mux *dst) |
| 558 | { |
| 559 | int i; |
| 560 | |
| 561 | for (i = 0; i < OMAP_MUX_NR_MODES; i++) { |
| 562 | if (src->muxnames[i]) { |
| 563 | dst->muxnames[i] = |
| 564 | kmalloc(strlen(src->muxnames[i]) + 1, |
| 565 | GFP_KERNEL); |
| 566 | if (!dst->muxnames[i]) |
| 567 | goto free; |
| 568 | strcpy(dst->muxnames[i], src->muxnames[i]); |
| 569 | } |
| 570 | } |
| 571 | |
| 572 | #ifdef CONFIG_DEBUG_FS |
| 573 | for (i = 0; i < OMAP_MUX_NR_SIDES; i++) { |
| 574 | if (src->balls[i]) { |
| 575 | dst->balls[i] = |
| 576 | kmalloc(strlen(src->balls[i]) + 1, |
| 577 | GFP_KERNEL); |
| 578 | if (!dst->balls[i]) |
| 579 | goto free; |
| 580 | strcpy(dst->balls[i], src->balls[i]); |
| 581 | } |
| 582 | } |
| 583 | #endif |
| 584 | |
| 585 | return 0; |
| 586 | |
| 587 | free: |
| 588 | omap_mux_free_names(dst); |
| 589 | return -ENOMEM; |
| 590 | |
| 591 | } |
| 592 | |
| 593 | #endif /* CONFIG_OMAP_MUX */ |
| 594 | |
| 595 | static u16 omap_mux_get_by_gpio(int gpio) |
| 596 | { |
| 597 | struct omap_mux_entry *e; |
| 598 | u16 offset = OMAP_MUX_TERMINATOR; |
| 599 | |
| 600 | list_for_each_entry(e, &muxmodes, node) { |
| 601 | struct omap_mux *m = &e->mux; |
| 602 | if (m->gpio == gpio) { |
| 603 | offset = m->reg_offset; |
| 604 | break; |
| 605 | } |
| 606 | } |
| 607 | |
| 608 | return offset; |
| 609 | } |
| 610 | |
| 611 | /* Needed for dynamic muxing of GPIO pins for off-idle */ |
| 612 | u16 omap_mux_get_gpio(int gpio) |
| 613 | { |
| 614 | u16 offset; |
| 615 | |
| 616 | offset = omap_mux_get_by_gpio(gpio); |
| 617 | if (offset == OMAP_MUX_TERMINATOR) { |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 618 | pr_err("mux: Could not get gpio%i\n", gpio); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 619 | return offset; |
| 620 | } |
| 621 | |
| 622 | return omap_mux_read(offset); |
| 623 | } |
| 624 | |
| 625 | /* Needed for dynamic muxing of GPIO pins for off-idle */ |
| 626 | void omap_mux_set_gpio(u16 val, int gpio) |
| 627 | { |
| 628 | u16 offset; |
| 629 | |
| 630 | offset = omap_mux_get_by_gpio(gpio); |
| 631 | if (offset == OMAP_MUX_TERMINATOR) { |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 632 | pr_err("mux: Could not set gpio%i\n", gpio); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 633 | return; |
| 634 | } |
| 635 | |
| 636 | omap_mux_write(val, offset); |
| 637 | } |
| 638 | |
| 639 | static struct omap_mux * __init omap_mux_list_add(struct omap_mux *src) |
| 640 | { |
| 641 | struct omap_mux_entry *entry; |
| 642 | struct omap_mux *m; |
| 643 | |
| 644 | entry = kzalloc(sizeof(struct omap_mux_entry), GFP_KERNEL); |
| 645 | if (!entry) |
| 646 | return NULL; |
| 647 | |
| 648 | m = &entry->mux; |
| 649 | memcpy(m, src, sizeof(struct omap_mux_entry)); |
| 650 | |
| 651 | #ifdef CONFIG_OMAP_MUX |
| 652 | if (omap_mux_copy_names(src, m)) { |
| 653 | kfree(entry); |
| 654 | return NULL; |
| 655 | } |
| 656 | #endif |
| 657 | |
| 658 | mutex_lock(&muxmode_mutex); |
| 659 | list_add_tail(&entry->node, &muxmodes); |
| 660 | mutex_unlock(&muxmode_mutex); |
| 661 | |
| 662 | return m; |
| 663 | } |
| 664 | |
| 665 | /* |
| 666 | * Note if CONFIG_OMAP_MUX is not selected, we will only initialize |
| 667 | * the GPIO to mux offset mapping that is needed for dynamic muxing |
| 668 | * of GPIO pins for off-idle. |
| 669 | */ |
| 670 | static void __init omap_mux_init_list(struct omap_mux *superset) |
| 671 | { |
| 672 | while (superset->reg_offset != OMAP_MUX_TERMINATOR) { |
| 673 | struct omap_mux *entry; |
| 674 | |
Ranjith Lohithakshan | b72c7d5 | 2010-02-17 17:17:01 +0000 | [diff] [blame] | 675 | #ifdef CONFIG_OMAP_MUX |
| 676 | if (!superset->muxnames || !superset->muxnames[0]) { |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 677 | superset++; |
| 678 | continue; |
| 679 | } |
Ranjith Lohithakshan | b72c7d5 | 2010-02-17 17:17:01 +0000 | [diff] [blame] | 680 | #else |
| 681 | /* Skip pins that are not muxed as GPIO by bootloader */ |
| 682 | if (!OMAP_MODE_GPIO(omap_mux_read(superset->reg_offset))) { |
Tony Lindgren | 9ecef43 | 2010-02-01 11:22:54 -0800 | [diff] [blame] | 683 | superset++; |
| 684 | continue; |
| 685 | } |
| 686 | #endif |
| 687 | |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 688 | entry = omap_mux_list_add(superset); |
| 689 | if (!entry) { |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 690 | pr_err("mux: Could not add entry\n"); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 691 | return; |
| 692 | } |
| 693 | superset++; |
| 694 | } |
| 695 | } |
| 696 | |
Tony Lindgren | 321cfc8 | 2010-02-15 10:03:35 -0800 | [diff] [blame] | 697 | #ifdef CONFIG_OMAP_MUX |
| 698 | |
| 699 | static void omap_mux_init_package(struct omap_mux *superset, |
| 700 | struct omap_mux *package_subset, |
| 701 | struct omap_ball *package_balls) |
| 702 | { |
| 703 | if (package_subset) |
| 704 | omap_mux_package_fixup(package_subset, superset); |
| 705 | if (package_balls) |
| 706 | omap_mux_package_init_balls(package_balls, superset); |
| 707 | } |
| 708 | |
| 709 | static void omap_mux_init_signals(struct omap_board_mux *board_mux) |
| 710 | { |
| 711 | omap_mux_set_cmdline_signals(); |
| 712 | omap_mux_write_array(board_mux); |
| 713 | } |
| 714 | |
| 715 | #else |
| 716 | |
| 717 | static void omap_mux_init_package(struct omap_mux *superset, |
| 718 | struct omap_mux *package_subset, |
| 719 | struct omap_ball *package_balls) |
| 720 | { |
| 721 | } |
| 722 | |
| 723 | static void omap_mux_init_signals(struct omap_board_mux *board_mux) |
| 724 | { |
| 725 | } |
| 726 | |
| 727 | #endif |
| 728 | |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 729 | int __init omap_mux_init(u32 mux_pbase, u32 mux_size, |
| 730 | struct omap_mux *superset, |
| 731 | struct omap_mux *package_subset, |
| 732 | struct omap_board_mux *board_mux, |
| 733 | struct omap_ball *package_balls) |
| 734 | { |
| 735 | if (mux_base) |
| 736 | return -EBUSY; |
| 737 | |
Tony Lindgren | 4b715ef | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 738 | mux_phys = mux_pbase; |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 739 | mux_base = ioremap(mux_pbase, mux_size); |
| 740 | if (!mux_base) { |
Benoit Cousson | 1cbb3a9 | 2010-08-10 17:33:01 +0200 | [diff] [blame^] | 741 | pr_err("mux: Could not ioremap\n"); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 742 | return -ENODEV; |
| 743 | } |
| 744 | |
Tony Lindgren | d5425be | 2010-07-05 16:31:35 +0300 | [diff] [blame] | 745 | if (cpu_is_omap24xx()) |
| 746 | omap_mux_flags = MUXABLE_GPIO_MODE3; |
| 747 | |
Tony Lindgren | 321cfc8 | 2010-02-15 10:03:35 -0800 | [diff] [blame] | 748 | omap_mux_init_package(superset, package_subset, package_balls); |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 749 | omap_mux_init_list(superset); |
Tony Lindgren | 321cfc8 | 2010-02-15 10:03:35 -0800 | [diff] [blame] | 750 | omap_mux_init_signals(board_mux); |
Tony Lindgren | 2cb0c54 | 2010-01-19 18:17:07 -0800 | [diff] [blame] | 751 | |
Tony Lindgren | 15ac7af | 2009-12-11 16:16:32 -0800 | [diff] [blame] | 752 | return 0; |
| 753 | } |
| 754 | |