Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1 | /* linux/drivers/mfd/sm501.c |
| 2 | * |
| 3 | * Copyright (C) 2006 Simtec Electronics |
| 4 | * Ben Dooks <ben@simtec.co.uk> |
| 5 | * Vincent Sanders <vince@simtec.co.uk> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | * |
| 11 | * SM501 MFD driver |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/delay.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/list.h> |
| 19 | #include <linux/device.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/pci.h> |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 22 | #include <linux/gpio.h> |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 23 | |
| 24 | #include <linux/sm501.h> |
| 25 | #include <linux/sm501-regs.h> |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 26 | #include <linux/serial_8250.h> |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 27 | |
| 28 | #include <asm/io.h> |
| 29 | |
| 30 | struct sm501_device { |
| 31 | struct list_head list; |
| 32 | struct platform_device pdev; |
| 33 | }; |
| 34 | |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 35 | struct sm501_gpio; |
| 36 | |
| 37 | struct sm501_gpio_chip { |
| 38 | struct gpio_chip gpio; |
| 39 | struct sm501_gpio *ourgpio; /* to get back to parent. */ |
| 40 | void __iomem *regbase; |
| 41 | }; |
| 42 | |
| 43 | struct sm501_gpio { |
| 44 | struct sm501_gpio_chip low; |
| 45 | struct sm501_gpio_chip high; |
| 46 | spinlock_t lock; |
| 47 | |
| 48 | unsigned int registered : 1; |
| 49 | void __iomem *regs; |
| 50 | struct resource *regs_res; |
| 51 | }; |
| 52 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 53 | struct sm501_devdata { |
| 54 | spinlock_t reg_lock; |
| 55 | struct mutex clock_lock; |
| 56 | struct list_head devices; |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 57 | struct sm501_gpio gpio; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 58 | |
| 59 | struct device *dev; |
| 60 | struct resource *io_res; |
| 61 | struct resource *mem_res; |
| 62 | struct resource *regs_claim; |
| 63 | struct sm501_platdata *platdata; |
| 64 | |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 65 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 66 | unsigned int in_suspend; |
| 67 | unsigned long pm_misc; |
| 68 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 69 | int unit_power[20]; |
| 70 | unsigned int pdev_id; |
| 71 | unsigned int irq; |
| 72 | void __iomem *regs; |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 73 | unsigned int rev; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 74 | }; |
| 75 | |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 76 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 77 | #define MHZ (1000 * 1000) |
| 78 | |
| 79 | #ifdef DEBUG |
Ville Syrjala | 245904a | 2008-03-04 14:28:49 -0800 | [diff] [blame] | 80 | static const unsigned int div_tab[] = { |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 81 | [0] = 1, |
| 82 | [1] = 2, |
| 83 | [2] = 4, |
| 84 | [3] = 8, |
| 85 | [4] = 16, |
| 86 | [5] = 32, |
| 87 | [6] = 64, |
| 88 | [7] = 128, |
| 89 | [8] = 3, |
| 90 | [9] = 6, |
| 91 | [10] = 12, |
| 92 | [11] = 24, |
| 93 | [12] = 48, |
| 94 | [13] = 96, |
| 95 | [14] = 192, |
| 96 | [15] = 384, |
| 97 | [16] = 5, |
| 98 | [17] = 10, |
| 99 | [18] = 20, |
| 100 | [19] = 40, |
| 101 | [20] = 80, |
| 102 | [21] = 160, |
| 103 | [22] = 320, |
| 104 | [23] = 604, |
| 105 | }; |
| 106 | |
| 107 | static unsigned long decode_div(unsigned long pll2, unsigned long val, |
| 108 | unsigned int lshft, unsigned int selbit, |
Ville Syrjala | 245904a | 2008-03-04 14:28:49 -0800 | [diff] [blame] | 109 | unsigned long mask) |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 110 | { |
| 111 | if (val & selbit) |
| 112 | pll2 = 288 * MHZ; |
| 113 | |
Ville Syrjala | 245904a | 2008-03-04 14:28:49 -0800 | [diff] [blame] | 114 | return pll2 / div_tab[(val >> lshft) & mask]; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | #define fmt_freq(x) ((x) / MHZ), ((x) % MHZ), (x) |
| 118 | |
| 119 | /* sm501_dump_clk |
| 120 | * |
| 121 | * Print out the current clock configuration for the device |
| 122 | */ |
| 123 | |
| 124 | static void sm501_dump_clk(struct sm501_devdata *sm) |
| 125 | { |
| 126 | unsigned long misct = readl(sm->regs + SM501_MISC_TIMING); |
| 127 | unsigned long pm0 = readl(sm->regs + SM501_POWER_MODE_0_CLOCK); |
| 128 | unsigned long pm1 = readl(sm->regs + SM501_POWER_MODE_1_CLOCK); |
| 129 | unsigned long pmc = readl(sm->regs + SM501_POWER_MODE_CONTROL); |
| 130 | unsigned long sdclk0, sdclk1; |
| 131 | unsigned long pll2 = 0; |
| 132 | |
| 133 | switch (misct & 0x30) { |
| 134 | case 0x00: |
| 135 | pll2 = 336 * MHZ; |
| 136 | break; |
| 137 | case 0x10: |
| 138 | pll2 = 288 * MHZ; |
| 139 | break; |
| 140 | case 0x20: |
| 141 | pll2 = 240 * MHZ; |
| 142 | break; |
| 143 | case 0x30: |
| 144 | pll2 = 192 * MHZ; |
| 145 | break; |
| 146 | } |
| 147 | |
| 148 | sdclk0 = (misct & (1<<12)) ? pll2 : 288 * MHZ; |
Ville Syrjala | 245904a | 2008-03-04 14:28:49 -0800 | [diff] [blame] | 149 | sdclk0 /= div_tab[((misct >> 8) & 0xf)]; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 150 | |
| 151 | sdclk1 = (misct & (1<<20)) ? pll2 : 288 * MHZ; |
Ville Syrjala | 245904a | 2008-03-04 14:28:49 -0800 | [diff] [blame] | 152 | sdclk1 /= div_tab[((misct >> 16) & 0xf)]; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 153 | |
| 154 | dev_dbg(sm->dev, "MISCT=%08lx, PM0=%08lx, PM1=%08lx\n", |
| 155 | misct, pm0, pm1); |
| 156 | |
| 157 | dev_dbg(sm->dev, "PLL2 = %ld.%ld MHz (%ld), SDCLK0=%08lx, SDCLK1=%08lx\n", |
| 158 | fmt_freq(pll2), sdclk0, sdclk1); |
| 159 | |
| 160 | dev_dbg(sm->dev, "SDRAM: PM0=%ld, PM1=%ld\n", sdclk0, sdclk1); |
| 161 | |
| 162 | dev_dbg(sm->dev, "PM0[%c]: " |
| 163 | "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), " |
Ben Dooks | 48986f0 | 2007-11-28 16:21:37 -0800 | [diff] [blame] | 164 | "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n", |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 165 | (pmc & 3 ) == 0 ? '*' : '-', |
Ville Syrjala | 245904a | 2008-03-04 14:28:49 -0800 | [diff] [blame] | 166 | fmt_freq(decode_div(pll2, pm0, 24, 1<<29, 31)), |
| 167 | fmt_freq(decode_div(pll2, pm0, 16, 1<<20, 15)), |
| 168 | fmt_freq(decode_div(pll2, pm0, 8, 1<<12, 15)), |
| 169 | fmt_freq(decode_div(pll2, pm0, 0, 1<<4, 15))); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 170 | |
| 171 | dev_dbg(sm->dev, "PM1[%c]: " |
| 172 | "P2 %ld.%ld MHz (%ld), V2 %ld.%ld (%ld), " |
| 173 | "M %ld.%ld (%ld), MX1 %ld.%ld (%ld)\n", |
| 174 | (pmc & 3 ) == 1 ? '*' : '-', |
Ville Syrjala | 245904a | 2008-03-04 14:28:49 -0800 | [diff] [blame] | 175 | fmt_freq(decode_div(pll2, pm1, 24, 1<<29, 31)), |
| 176 | fmt_freq(decode_div(pll2, pm1, 16, 1<<20, 15)), |
| 177 | fmt_freq(decode_div(pll2, pm1, 8, 1<<12, 15)), |
| 178 | fmt_freq(decode_div(pll2, pm1, 0, 1<<4, 15))); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 179 | } |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 180 | |
| 181 | static void sm501_dump_regs(struct sm501_devdata *sm) |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 182 | { |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 183 | void __iomem *regs = sm->regs; |
| 184 | |
| 185 | dev_info(sm->dev, "System Control %08x\n", |
| 186 | readl(regs + SM501_SYSTEM_CONTROL)); |
| 187 | dev_info(sm->dev, "Misc Control %08x\n", |
| 188 | readl(regs + SM501_MISC_CONTROL)); |
| 189 | dev_info(sm->dev, "GPIO Control Low %08x\n", |
| 190 | readl(regs + SM501_GPIO31_0_CONTROL)); |
| 191 | dev_info(sm->dev, "GPIO Control Hi %08x\n", |
| 192 | readl(regs + SM501_GPIO63_32_CONTROL)); |
| 193 | dev_info(sm->dev, "DRAM Control %08x\n", |
| 194 | readl(regs + SM501_DRAM_CONTROL)); |
| 195 | dev_info(sm->dev, "Arbitration Ctrl %08x\n", |
| 196 | readl(regs + SM501_ARBTRTN_CONTROL)); |
| 197 | dev_info(sm->dev, "Misc Timing %08x\n", |
| 198 | readl(regs + SM501_MISC_TIMING)); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 199 | } |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 200 | |
| 201 | static void sm501_dump_gate(struct sm501_devdata *sm) |
| 202 | { |
| 203 | dev_info(sm->dev, "CurrentGate %08x\n", |
| 204 | readl(sm->regs + SM501_CURRENT_GATE)); |
| 205 | dev_info(sm->dev, "CurrentClock %08x\n", |
| 206 | readl(sm->regs + SM501_CURRENT_CLOCK)); |
| 207 | dev_info(sm->dev, "PowerModeControl %08x\n", |
| 208 | readl(sm->regs + SM501_POWER_MODE_CONTROL)); |
| 209 | } |
| 210 | |
| 211 | #else |
| 212 | static inline void sm501_dump_gate(struct sm501_devdata *sm) { } |
| 213 | static inline void sm501_dump_regs(struct sm501_devdata *sm) { } |
| 214 | static inline void sm501_dump_clk(struct sm501_devdata *sm) { } |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 215 | #endif |
| 216 | |
| 217 | /* sm501_sync_regs |
| 218 | * |
| 219 | * ensure the |
| 220 | */ |
| 221 | |
| 222 | static void sm501_sync_regs(struct sm501_devdata *sm) |
| 223 | { |
| 224 | readl(sm->regs); |
| 225 | } |
| 226 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 227 | static inline void sm501_mdelay(struct sm501_devdata *sm, unsigned int delay) |
| 228 | { |
| 229 | /* during suspend/resume, we are currently not allowed to sleep, |
| 230 | * so change to using mdelay() instead of msleep() if we |
| 231 | * are in one of these paths */ |
| 232 | |
| 233 | if (sm->in_suspend) |
| 234 | mdelay(delay); |
| 235 | else |
| 236 | msleep(delay); |
| 237 | } |
| 238 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 239 | /* sm501_misc_control |
| 240 | * |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 241 | * alters the miscellaneous control parameters |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 242 | */ |
| 243 | |
| 244 | int sm501_misc_control(struct device *dev, |
| 245 | unsigned long set, unsigned long clear) |
| 246 | { |
| 247 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 248 | unsigned long misc; |
| 249 | unsigned long save; |
| 250 | unsigned long to; |
| 251 | |
| 252 | spin_lock_irqsave(&sm->reg_lock, save); |
| 253 | |
| 254 | misc = readl(sm->regs + SM501_MISC_CONTROL); |
| 255 | to = (misc & ~clear) | set; |
| 256 | |
| 257 | if (to != misc) { |
| 258 | writel(to, sm->regs + SM501_MISC_CONTROL); |
| 259 | sm501_sync_regs(sm); |
| 260 | |
| 261 | dev_dbg(sm->dev, "MISC_CONTROL %08lx\n", misc); |
| 262 | } |
| 263 | |
| 264 | spin_unlock_irqrestore(&sm->reg_lock, save); |
| 265 | return to; |
| 266 | } |
| 267 | |
| 268 | EXPORT_SYMBOL_GPL(sm501_misc_control); |
| 269 | |
| 270 | /* sm501_modify_reg |
| 271 | * |
| 272 | * Modify a register in the SM501 which may be shared with other |
| 273 | * drivers. |
| 274 | */ |
| 275 | |
| 276 | unsigned long sm501_modify_reg(struct device *dev, |
| 277 | unsigned long reg, |
| 278 | unsigned long set, |
| 279 | unsigned long clear) |
| 280 | { |
| 281 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 282 | unsigned long data; |
| 283 | unsigned long save; |
| 284 | |
| 285 | spin_lock_irqsave(&sm->reg_lock, save); |
| 286 | |
| 287 | data = readl(sm->regs + reg); |
| 288 | data |= set; |
| 289 | data &= ~clear; |
| 290 | |
| 291 | writel(data, sm->regs + reg); |
| 292 | sm501_sync_regs(sm); |
| 293 | |
| 294 | spin_unlock_irqrestore(&sm->reg_lock, save); |
| 295 | |
| 296 | return data; |
| 297 | } |
| 298 | |
| 299 | EXPORT_SYMBOL_GPL(sm501_modify_reg); |
| 300 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 301 | /* sm501_unit_power |
| 302 | * |
| 303 | * alters the power active gate to set specific units on or off |
| 304 | */ |
| 305 | |
| 306 | int sm501_unit_power(struct device *dev, unsigned int unit, unsigned int to) |
| 307 | { |
| 308 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 309 | unsigned long mode; |
| 310 | unsigned long gate; |
| 311 | unsigned long clock; |
| 312 | |
| 313 | mutex_lock(&sm->clock_lock); |
| 314 | |
| 315 | mode = readl(sm->regs + SM501_POWER_MODE_CONTROL); |
| 316 | gate = readl(sm->regs + SM501_CURRENT_GATE); |
| 317 | clock = readl(sm->regs + SM501_CURRENT_CLOCK); |
| 318 | |
| 319 | mode &= 3; /* get current power mode */ |
| 320 | |
Adrian Bunk | bf703c3 | 2007-04-01 23:49:38 -0700 | [diff] [blame] | 321 | if (unit >= ARRAY_SIZE(sm->unit_power)) { |
Harvey Harrison | 145980a | 2008-04-30 00:54:57 -0700 | [diff] [blame] | 322 | dev_err(dev, "%s: bad unit %d\n", __func__, unit); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 323 | goto already; |
| 324 | } |
| 325 | |
Harvey Harrison | 145980a | 2008-04-30 00:54:57 -0700 | [diff] [blame] | 326 | dev_dbg(sm->dev, "%s: unit %d, cur %d, to %d\n", __func__, unit, |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 327 | sm->unit_power[unit], to); |
| 328 | |
| 329 | if (to == 0 && sm->unit_power[unit] == 0) { |
| 330 | dev_err(sm->dev, "unit %d is already shutdown\n", unit); |
| 331 | goto already; |
| 332 | } |
| 333 | |
| 334 | sm->unit_power[unit] += to ? 1 : -1; |
| 335 | to = sm->unit_power[unit] ? 1 : 0; |
| 336 | |
| 337 | if (to) { |
| 338 | if (gate & (1 << unit)) |
| 339 | goto already; |
| 340 | gate |= (1 << unit); |
| 341 | } else { |
| 342 | if (!(gate & (1 << unit))) |
| 343 | goto already; |
| 344 | gate &= ~(1 << unit); |
| 345 | } |
| 346 | |
| 347 | switch (mode) { |
| 348 | case 1: |
| 349 | writel(gate, sm->regs + SM501_POWER_MODE_0_GATE); |
| 350 | writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK); |
| 351 | mode = 0; |
| 352 | break; |
| 353 | case 2: |
| 354 | case 0: |
| 355 | writel(gate, sm->regs + SM501_POWER_MODE_1_GATE); |
| 356 | writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK); |
| 357 | mode = 1; |
| 358 | break; |
| 359 | |
| 360 | default: |
| 361 | return -1; |
| 362 | } |
| 363 | |
| 364 | writel(mode, sm->regs + SM501_POWER_MODE_CONTROL); |
| 365 | sm501_sync_regs(sm); |
| 366 | |
| 367 | dev_dbg(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n", |
| 368 | gate, clock, mode); |
| 369 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 370 | sm501_mdelay(sm, 16); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 371 | |
| 372 | already: |
| 373 | mutex_unlock(&sm->clock_lock); |
| 374 | return gate; |
| 375 | } |
| 376 | |
| 377 | EXPORT_SYMBOL_GPL(sm501_unit_power); |
| 378 | |
| 379 | |
| 380 | /* Perform a rounded division. */ |
| 381 | static long sm501fb_round_div(long num, long denom) |
| 382 | { |
| 383 | /* n / d + 1 / 2 = (2n + d) / 2d */ |
| 384 | return (2 * num + denom) / (2 * denom); |
| 385 | } |
| 386 | |
| 387 | /* clock value structure. */ |
| 388 | struct sm501_clock { |
| 389 | unsigned long mclk; |
| 390 | int divider; |
| 391 | int shift; |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 392 | unsigned int m, n, k; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 393 | }; |
| 394 | |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 395 | /* sm501_calc_clock |
| 396 | * |
| 397 | * Calculates the nearest discrete clock frequency that |
| 398 | * can be achieved with the specified input clock. |
| 399 | * the maximum divisor is 3 or 5 |
| 400 | */ |
| 401 | |
| 402 | static int sm501_calc_clock(unsigned long freq, |
| 403 | struct sm501_clock *clock, |
| 404 | int max_div, |
| 405 | unsigned long mclk, |
| 406 | long *best_diff) |
| 407 | { |
| 408 | int ret = 0; |
| 409 | int divider; |
| 410 | int shift; |
| 411 | long diff; |
| 412 | |
| 413 | /* try dividers 1 and 3 for CRT and for panel, |
| 414 | try divider 5 for panel only.*/ |
| 415 | |
| 416 | for (divider = 1; divider <= max_div; divider += 2) { |
| 417 | /* try all 8 shift values.*/ |
| 418 | for (shift = 0; shift < 8; shift++) { |
| 419 | /* Calculate difference to requested clock */ |
| 420 | diff = sm501fb_round_div(mclk, divider << shift) - freq; |
| 421 | if (diff < 0) |
| 422 | diff = -diff; |
| 423 | |
| 424 | /* If it is less than the current, use it */ |
| 425 | if (diff < *best_diff) { |
| 426 | *best_diff = diff; |
| 427 | |
| 428 | clock->mclk = mclk; |
| 429 | clock->divider = divider; |
| 430 | clock->shift = shift; |
| 431 | ret = 1; |
| 432 | } |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | return ret; |
| 437 | } |
| 438 | |
| 439 | /* sm501_calc_pll |
| 440 | * |
| 441 | * Calculates the nearest discrete clock frequency that can be |
| 442 | * achieved using the programmable PLL. |
| 443 | * the maximum divisor is 3 or 5 |
| 444 | */ |
| 445 | |
| 446 | static unsigned long sm501_calc_pll(unsigned long freq, |
| 447 | struct sm501_clock *clock, |
| 448 | int max_div) |
| 449 | { |
| 450 | unsigned long mclk; |
| 451 | unsigned int m, n, k; |
| 452 | long best_diff = 999999999; |
| 453 | |
| 454 | /* |
| 455 | * The SM502 datasheet doesn't specify the min/max values for M and N. |
| 456 | * N = 1 at least doesn't work in practice. |
| 457 | */ |
| 458 | for (m = 2; m <= 255; m++) { |
| 459 | for (n = 2; n <= 127; n++) { |
| 460 | for (k = 0; k <= 1; k++) { |
| 461 | mclk = (24000000UL * m / n) >> k; |
| 462 | |
| 463 | if (sm501_calc_clock(freq, clock, max_div, |
| 464 | mclk, &best_diff)) { |
| 465 | clock->m = m; |
| 466 | clock->n = n; |
| 467 | clock->k = k; |
| 468 | } |
| 469 | } |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | /* Return best clock. */ |
| 474 | return clock->mclk / (clock->divider << clock->shift); |
| 475 | } |
| 476 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 477 | /* sm501_select_clock |
| 478 | * |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 479 | * Calculates the nearest discrete clock frequency that can be |
| 480 | * achieved using the 288MHz and 336MHz PLLs. |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 481 | * the maximum divisor is 3 or 5 |
| 482 | */ |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 483 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 484 | static unsigned long sm501_select_clock(unsigned long freq, |
| 485 | struct sm501_clock *clock, |
| 486 | int max_div) |
| 487 | { |
| 488 | unsigned long mclk; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 489 | long best_diff = 999999999; |
| 490 | |
| 491 | /* Try 288MHz and 336MHz clocks. */ |
| 492 | for (mclk = 288000000; mclk <= 336000000; mclk += 48000000) { |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 493 | sm501_calc_clock(freq, clock, max_div, mclk, &best_diff); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | /* Return best clock. */ |
| 497 | return clock->mclk / (clock->divider << clock->shift); |
| 498 | } |
| 499 | |
| 500 | /* sm501_set_clock |
| 501 | * |
| 502 | * set one of the four clock sources to the closest available frequency to |
| 503 | * the one specified |
| 504 | */ |
| 505 | |
| 506 | unsigned long sm501_set_clock(struct device *dev, |
| 507 | int clksrc, |
| 508 | unsigned long req_freq) |
| 509 | { |
| 510 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
| 511 | unsigned long mode = readl(sm->regs + SM501_POWER_MODE_CONTROL); |
| 512 | unsigned long gate = readl(sm->regs + SM501_CURRENT_GATE); |
| 513 | unsigned long clock = readl(sm->regs + SM501_CURRENT_CLOCK); |
| 514 | unsigned char reg; |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 515 | unsigned int pll_reg = 0; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 516 | unsigned long sm501_freq; /* the actual frequency acheived */ |
| 517 | |
| 518 | struct sm501_clock to; |
| 519 | |
| 520 | /* find achivable discrete frequency and setup register value |
| 521 | * accordingly, V2XCLK, MCLK and M1XCLK are the same P2XCLK |
| 522 | * has an extra bit for the divider */ |
| 523 | |
| 524 | switch (clksrc) { |
| 525 | case SM501_CLOCK_P2XCLK: |
| 526 | /* This clock is divided in half so to achive the |
| 527 | * requested frequency the value must be multiplied by |
| 528 | * 2. This clock also has an additional pre divisor */ |
| 529 | |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 530 | if (sm->rev >= 0xC0) { |
| 531 | /* SM502 -> use the programmable PLL */ |
| 532 | sm501_freq = (sm501_calc_pll(2 * req_freq, |
| 533 | &to, 5) / 2); |
| 534 | reg = to.shift & 0x07;/* bottom 3 bits are shift */ |
| 535 | if (to.divider == 3) |
| 536 | reg |= 0x08; /* /3 divider required */ |
| 537 | else if (to.divider == 5) |
| 538 | reg |= 0x10; /* /5 divider required */ |
| 539 | reg |= 0x40; /* select the programmable PLL */ |
| 540 | pll_reg = 0x20000 | (to.k << 15) | (to.n << 8) | to.m; |
| 541 | } else { |
| 542 | sm501_freq = (sm501_select_clock(2 * req_freq, |
| 543 | &to, 5) / 2); |
| 544 | reg = to.shift & 0x07;/* bottom 3 bits are shift */ |
| 545 | if (to.divider == 3) |
| 546 | reg |= 0x08; /* /3 divider required */ |
| 547 | else if (to.divider == 5) |
| 548 | reg |= 0x10; /* /5 divider required */ |
| 549 | if (to.mclk != 288000000) |
| 550 | reg |= 0x20; /* which mclk pll is source */ |
| 551 | } |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 552 | break; |
| 553 | |
| 554 | case SM501_CLOCK_V2XCLK: |
| 555 | /* This clock is divided in half so to achive the |
| 556 | * requested frequency the value must be multiplied by 2. */ |
| 557 | |
| 558 | sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2); |
| 559 | reg=to.shift & 0x07; /* bottom 3 bits are shift */ |
| 560 | if (to.divider == 3) |
| 561 | reg |= 0x08; /* /3 divider required */ |
| 562 | if (to.mclk != 288000000) |
| 563 | reg |= 0x10; /* which mclk pll is source */ |
| 564 | break; |
| 565 | |
| 566 | case SM501_CLOCK_MCLK: |
| 567 | case SM501_CLOCK_M1XCLK: |
| 568 | /* These clocks are the same and not further divided */ |
| 569 | |
| 570 | sm501_freq = sm501_select_clock( req_freq, &to, 3); |
| 571 | reg=to.shift & 0x07; /* bottom 3 bits are shift */ |
| 572 | if (to.divider == 3) |
| 573 | reg |= 0x08; /* /3 divider required */ |
| 574 | if (to.mclk != 288000000) |
| 575 | reg |= 0x10; /* which mclk pll is source */ |
| 576 | break; |
| 577 | |
| 578 | default: |
| 579 | return 0; /* this is bad */ |
| 580 | } |
| 581 | |
| 582 | mutex_lock(&sm->clock_lock); |
| 583 | |
| 584 | mode = readl(sm->regs + SM501_POWER_MODE_CONTROL); |
| 585 | gate = readl(sm->regs + SM501_CURRENT_GATE); |
| 586 | clock = readl(sm->regs + SM501_CURRENT_CLOCK); |
| 587 | |
| 588 | clock = clock & ~(0xFF << clksrc); |
| 589 | clock |= reg<<clksrc; |
| 590 | |
| 591 | mode &= 3; /* find current mode */ |
| 592 | |
| 593 | switch (mode) { |
| 594 | case 1: |
| 595 | writel(gate, sm->regs + SM501_POWER_MODE_0_GATE); |
| 596 | writel(clock, sm->regs + SM501_POWER_MODE_0_CLOCK); |
| 597 | mode = 0; |
| 598 | break; |
| 599 | case 2: |
| 600 | case 0: |
| 601 | writel(gate, sm->regs + SM501_POWER_MODE_1_GATE); |
| 602 | writel(clock, sm->regs + SM501_POWER_MODE_1_CLOCK); |
| 603 | mode = 1; |
| 604 | break; |
| 605 | |
| 606 | default: |
| 607 | mutex_unlock(&sm->clock_lock); |
| 608 | return -1; |
| 609 | } |
| 610 | |
| 611 | writel(mode, sm->regs + SM501_POWER_MODE_CONTROL); |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 612 | |
| 613 | if (pll_reg) |
| 614 | writel(pll_reg, sm->regs + SM501_PROGRAMMABLE_PLL_CONTROL); |
| 615 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 616 | sm501_sync_regs(sm); |
| 617 | |
| 618 | dev_info(sm->dev, "gate %08lx, clock %08lx, mode %08lx\n", |
| 619 | gate, clock, mode); |
| 620 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 621 | sm501_mdelay(sm, 16); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 622 | mutex_unlock(&sm->clock_lock); |
| 623 | |
| 624 | sm501_dump_clk(sm); |
| 625 | |
| 626 | return sm501_freq; |
| 627 | } |
| 628 | |
| 629 | EXPORT_SYMBOL_GPL(sm501_set_clock); |
| 630 | |
| 631 | /* sm501_find_clock |
| 632 | * |
| 633 | * finds the closest available frequency for a given clock |
| 634 | */ |
| 635 | |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 636 | unsigned long sm501_find_clock(struct device *dev, |
| 637 | int clksrc, |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 638 | unsigned long req_freq) |
| 639 | { |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 640 | struct sm501_devdata *sm = dev_get_drvdata(dev); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 641 | unsigned long sm501_freq; /* the frequency achiveable by the 501 */ |
| 642 | struct sm501_clock to; |
| 643 | |
| 644 | switch (clksrc) { |
| 645 | case SM501_CLOCK_P2XCLK: |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 646 | if (sm->rev >= 0xC0) { |
| 647 | /* SM502 -> use the programmable PLL */ |
| 648 | sm501_freq = (sm501_calc_pll(2 * req_freq, |
| 649 | &to, 5) / 2); |
| 650 | } else { |
| 651 | sm501_freq = (sm501_select_clock(2 * req_freq, |
| 652 | &to, 5) / 2); |
| 653 | } |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 654 | break; |
| 655 | |
| 656 | case SM501_CLOCK_V2XCLK: |
| 657 | sm501_freq = (sm501_select_clock(2 * req_freq, &to, 3) / 2); |
| 658 | break; |
| 659 | |
| 660 | case SM501_CLOCK_MCLK: |
| 661 | case SM501_CLOCK_M1XCLK: |
| 662 | sm501_freq = sm501_select_clock(req_freq, &to, 3); |
| 663 | break; |
| 664 | |
| 665 | default: |
| 666 | sm501_freq = 0; /* error */ |
| 667 | } |
| 668 | |
| 669 | return sm501_freq; |
| 670 | } |
| 671 | |
| 672 | EXPORT_SYMBOL_GPL(sm501_find_clock); |
| 673 | |
| 674 | static struct sm501_device *to_sm_device(struct platform_device *pdev) |
| 675 | { |
| 676 | return container_of(pdev, struct sm501_device, pdev); |
| 677 | } |
| 678 | |
| 679 | /* sm501_device_release |
| 680 | * |
| 681 | * A release function for the platform devices we create to allow us to |
| 682 | * free any items we allocated |
| 683 | */ |
| 684 | |
| 685 | static void sm501_device_release(struct device *dev) |
| 686 | { |
| 687 | kfree(to_sm_device(to_platform_device(dev))); |
| 688 | } |
| 689 | |
| 690 | /* sm501_create_subdev |
| 691 | * |
| 692 | * Create a skeleton platform device with resources for passing to a |
| 693 | * sub-driver |
| 694 | */ |
| 695 | |
| 696 | static struct platform_device * |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 697 | sm501_create_subdev(struct sm501_devdata *sm, char *name, |
| 698 | unsigned int res_count, unsigned int platform_data_size) |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 699 | { |
| 700 | struct sm501_device *smdev; |
| 701 | |
| 702 | smdev = kzalloc(sizeof(struct sm501_device) + |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 703 | (sizeof(struct resource) * res_count) + |
| 704 | platform_data_size, GFP_KERNEL); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 705 | if (!smdev) |
| 706 | return NULL; |
| 707 | |
| 708 | smdev->pdev.dev.release = sm501_device_release; |
| 709 | |
| 710 | smdev->pdev.name = name; |
| 711 | smdev->pdev.id = sm->pdev_id; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 712 | smdev->pdev.dev.parent = sm->dev; |
| 713 | |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 714 | if (res_count) { |
| 715 | smdev->pdev.resource = (struct resource *)(smdev+1); |
| 716 | smdev->pdev.num_resources = res_count; |
| 717 | } |
| 718 | if (platform_data_size) |
| 719 | smdev->pdev.dev.platform_data = (void *)(smdev+1); |
| 720 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 721 | return &smdev->pdev; |
| 722 | } |
| 723 | |
| 724 | /* sm501_register_device |
| 725 | * |
| 726 | * Register a platform device created with sm501_create_subdev() |
| 727 | */ |
| 728 | |
| 729 | static int sm501_register_device(struct sm501_devdata *sm, |
| 730 | struct platform_device *pdev) |
| 731 | { |
| 732 | struct sm501_device *smdev = to_sm_device(pdev); |
| 733 | int ptr; |
| 734 | int ret; |
| 735 | |
| 736 | for (ptr = 0; ptr < pdev->num_resources; ptr++) { |
| 737 | printk("%s[%d] flags %08lx: %08llx..%08llx\n", |
| 738 | pdev->name, ptr, |
| 739 | pdev->resource[ptr].flags, |
| 740 | (unsigned long long)pdev->resource[ptr].start, |
| 741 | (unsigned long long)pdev->resource[ptr].end); |
| 742 | } |
| 743 | |
| 744 | ret = platform_device_register(pdev); |
| 745 | |
| 746 | if (ret >= 0) { |
| 747 | dev_dbg(sm->dev, "registered %s\n", pdev->name); |
| 748 | list_add_tail(&smdev->list, &sm->devices); |
| 749 | } else |
| 750 | dev_err(sm->dev, "error registering %s (%d)\n", |
| 751 | pdev->name, ret); |
| 752 | |
| 753 | return ret; |
| 754 | } |
| 755 | |
| 756 | /* sm501_create_subio |
| 757 | * |
| 758 | * Fill in an IO resource for a sub device |
| 759 | */ |
| 760 | |
| 761 | static void sm501_create_subio(struct sm501_devdata *sm, |
| 762 | struct resource *res, |
| 763 | resource_size_t offs, |
| 764 | resource_size_t size) |
| 765 | { |
| 766 | res->flags = IORESOURCE_MEM; |
| 767 | res->parent = sm->io_res; |
| 768 | res->start = sm->io_res->start + offs; |
| 769 | res->end = res->start + size - 1; |
| 770 | } |
| 771 | |
| 772 | /* sm501_create_mem |
| 773 | * |
| 774 | * Fill in an MEM resource for a sub device |
| 775 | */ |
| 776 | |
| 777 | static void sm501_create_mem(struct sm501_devdata *sm, |
| 778 | struct resource *res, |
| 779 | resource_size_t *offs, |
| 780 | resource_size_t size) |
| 781 | { |
| 782 | *offs -= size; /* adjust memory size */ |
| 783 | |
| 784 | res->flags = IORESOURCE_MEM; |
| 785 | res->parent = sm->mem_res; |
| 786 | res->start = sm->mem_res->start + *offs; |
| 787 | res->end = res->start + size - 1; |
| 788 | } |
| 789 | |
| 790 | /* sm501_create_irq |
| 791 | * |
| 792 | * Fill in an IRQ resource for a sub device |
| 793 | */ |
| 794 | |
| 795 | static void sm501_create_irq(struct sm501_devdata *sm, |
| 796 | struct resource *res) |
| 797 | { |
| 798 | res->flags = IORESOURCE_IRQ; |
| 799 | res->parent = NULL; |
| 800 | res->start = res->end = sm->irq; |
| 801 | } |
| 802 | |
| 803 | static int sm501_register_usbhost(struct sm501_devdata *sm, |
| 804 | resource_size_t *mem_avail) |
| 805 | { |
| 806 | struct platform_device *pdev; |
| 807 | |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 808 | pdev = sm501_create_subdev(sm, "sm501-usb", 3, 0); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 809 | if (!pdev) |
| 810 | return -ENOMEM; |
| 811 | |
| 812 | sm501_create_subio(sm, &pdev->resource[0], 0x40000, 0x20000); |
| 813 | sm501_create_mem(sm, &pdev->resource[1], mem_avail, 256*1024); |
| 814 | sm501_create_irq(sm, &pdev->resource[2]); |
| 815 | |
| 816 | return sm501_register_device(sm, pdev); |
| 817 | } |
| 818 | |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 819 | static void sm501_setup_uart_data(struct sm501_devdata *sm, |
| 820 | struct plat_serial8250_port *uart_data, |
| 821 | unsigned int offset) |
| 822 | { |
| 823 | uart_data->membase = sm->regs + offset; |
| 824 | uart_data->mapbase = sm->io_res->start + offset; |
| 825 | uart_data->iotype = UPIO_MEM; |
| 826 | uart_data->irq = sm->irq; |
| 827 | uart_data->flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ; |
| 828 | uart_data->regshift = 2; |
| 829 | uart_data->uartclk = (9600 * 16); |
| 830 | } |
| 831 | |
| 832 | static int sm501_register_uart(struct sm501_devdata *sm, int devices) |
| 833 | { |
| 834 | struct platform_device *pdev; |
| 835 | struct plat_serial8250_port *uart_data; |
| 836 | |
| 837 | pdev = sm501_create_subdev(sm, "serial8250", 0, |
| 838 | sizeof(struct plat_serial8250_port) * 3); |
| 839 | if (!pdev) |
| 840 | return -ENOMEM; |
| 841 | |
| 842 | uart_data = pdev->dev.platform_data; |
| 843 | |
| 844 | if (devices & SM501_USE_UART0) { |
| 845 | sm501_setup_uart_data(sm, uart_data++, 0x30000); |
| 846 | sm501_unit_power(sm->dev, SM501_GATE_UART0, 1); |
| 847 | sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 12, 0); |
| 848 | sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x01e0, 0); |
| 849 | } |
| 850 | if (devices & SM501_USE_UART1) { |
| 851 | sm501_setup_uart_data(sm, uart_data++, 0x30020); |
| 852 | sm501_unit_power(sm->dev, SM501_GATE_UART1, 1); |
| 853 | sm501_modify_reg(sm->dev, SM501_IRQ_MASK, 1 << 13, 0); |
| 854 | sm501_modify_reg(sm->dev, SM501_GPIO63_32_CONTROL, 0x1e00, 0); |
| 855 | } |
| 856 | |
| 857 | pdev->id = PLAT8250_DEV_SM501; |
| 858 | |
| 859 | return sm501_register_device(sm, pdev); |
| 860 | } |
| 861 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 862 | static int sm501_register_display(struct sm501_devdata *sm, |
| 863 | resource_size_t *mem_avail) |
| 864 | { |
| 865 | struct platform_device *pdev; |
| 866 | |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 867 | pdev = sm501_create_subdev(sm, "sm501-fb", 4, 0); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 868 | if (!pdev) |
| 869 | return -ENOMEM; |
| 870 | |
| 871 | sm501_create_subio(sm, &pdev->resource[0], 0x80000, 0x10000); |
| 872 | sm501_create_subio(sm, &pdev->resource[1], 0x100000, 0x50000); |
| 873 | sm501_create_mem(sm, &pdev->resource[2], mem_avail, *mem_avail); |
| 874 | sm501_create_irq(sm, &pdev->resource[3]); |
| 875 | |
| 876 | return sm501_register_device(sm, pdev); |
| 877 | } |
| 878 | |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 879 | #ifdef CONFIG_MFD_SM501_GPIO |
| 880 | |
| 881 | static inline struct sm501_gpio_chip *to_sm501_gpio(struct gpio_chip *gc) |
| 882 | { |
| 883 | return container_of(gc, struct sm501_gpio_chip, gpio); |
| 884 | } |
| 885 | |
| 886 | static inline struct sm501_devdata *sm501_gpio_to_dev(struct sm501_gpio *gpio) |
| 887 | { |
| 888 | return container_of(gpio, struct sm501_devdata, gpio); |
| 889 | } |
| 890 | |
| 891 | static int sm501_gpio_get(struct gpio_chip *chip, unsigned offset) |
| 892 | |
| 893 | { |
| 894 | struct sm501_gpio_chip *smgpio = to_sm501_gpio(chip); |
| 895 | unsigned long result; |
| 896 | |
| 897 | result = readl(smgpio->regbase + SM501_GPIO_DATA_LOW); |
| 898 | result >>= offset; |
| 899 | |
| 900 | return result & 1UL; |
| 901 | } |
| 902 | |
| 903 | static void sm501_gpio_set(struct gpio_chip *chip, unsigned offset, int value) |
| 904 | |
| 905 | { |
| 906 | struct sm501_gpio_chip *smchip = to_sm501_gpio(chip); |
| 907 | struct sm501_gpio *smgpio = smchip->ourgpio; |
| 908 | unsigned long bit = 1 << offset; |
| 909 | void __iomem *regs = smchip->regbase; |
| 910 | unsigned long save; |
| 911 | unsigned long val; |
| 912 | |
| 913 | dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n", |
| 914 | __func__, chip, offset); |
| 915 | |
| 916 | spin_lock_irqsave(&smgpio->lock, save); |
| 917 | |
| 918 | val = readl(regs + SM501_GPIO_DATA_LOW) & ~bit; |
| 919 | if (value) |
| 920 | val |= bit; |
| 921 | writel(val, regs); |
| 922 | |
| 923 | sm501_sync_regs(sm501_gpio_to_dev(smgpio)); |
| 924 | spin_unlock_irqrestore(&smgpio->lock, save); |
| 925 | } |
| 926 | |
| 927 | static int sm501_gpio_input(struct gpio_chip *chip, unsigned offset) |
| 928 | { |
| 929 | struct sm501_gpio_chip *smchip = to_sm501_gpio(chip); |
| 930 | struct sm501_gpio *smgpio = smchip->ourgpio; |
| 931 | void __iomem *regs = smchip->regbase; |
| 932 | unsigned long bit = 1 << offset; |
| 933 | unsigned long save; |
| 934 | unsigned long ddr; |
| 935 | |
| 936 | dev_info(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d)\n", |
| 937 | __func__, chip, offset); |
| 938 | |
| 939 | spin_lock_irqsave(&smgpio->lock, save); |
| 940 | |
| 941 | ddr = readl(regs + SM501_GPIO_DDR_LOW); |
| 942 | writel(ddr & ~bit, regs + SM501_GPIO_DDR_LOW); |
| 943 | |
| 944 | sm501_sync_regs(sm501_gpio_to_dev(smgpio)); |
| 945 | spin_unlock_irqrestore(&smgpio->lock, save); |
| 946 | |
| 947 | return 0; |
| 948 | } |
| 949 | |
| 950 | static int sm501_gpio_output(struct gpio_chip *chip, |
| 951 | unsigned offset, int value) |
| 952 | { |
| 953 | struct sm501_gpio_chip *smchip = to_sm501_gpio(chip); |
| 954 | struct sm501_gpio *smgpio = smchip->ourgpio; |
| 955 | unsigned long bit = 1 << offset; |
| 956 | void __iomem *regs = smchip->regbase; |
| 957 | unsigned long save; |
| 958 | unsigned long val; |
| 959 | unsigned long ddr; |
| 960 | |
| 961 | dev_dbg(sm501_gpio_to_dev(smgpio)->dev, "%s(%p,%d,%d)\n", |
| 962 | __func__, chip, offset, value); |
| 963 | |
| 964 | spin_lock_irqsave(&smgpio->lock, save); |
| 965 | |
| 966 | val = readl(regs + SM501_GPIO_DATA_LOW); |
| 967 | if (value) |
| 968 | val |= bit; |
| 969 | else |
| 970 | val &= ~bit; |
| 971 | writel(val, regs); |
| 972 | |
| 973 | ddr = readl(regs + SM501_GPIO_DDR_LOW); |
| 974 | writel(ddr | bit, regs + SM501_GPIO_DDR_LOW); |
| 975 | |
| 976 | sm501_sync_regs(sm501_gpio_to_dev(smgpio)); |
| 977 | writel(val, regs + SM501_GPIO_DATA_LOW); |
| 978 | |
| 979 | sm501_sync_regs(sm501_gpio_to_dev(smgpio)); |
| 980 | spin_unlock_irqrestore(&smgpio->lock, save); |
| 981 | |
| 982 | return 0; |
| 983 | } |
| 984 | |
| 985 | static struct gpio_chip gpio_chip_template = { |
| 986 | .ngpio = 32, |
| 987 | .direction_input = sm501_gpio_input, |
| 988 | .direction_output = sm501_gpio_output, |
| 989 | .set = sm501_gpio_set, |
| 990 | .get = sm501_gpio_get, |
| 991 | }; |
| 992 | |
| 993 | static int __devinit sm501_gpio_register_chip(struct sm501_devdata *sm, |
| 994 | struct sm501_gpio *gpio, |
| 995 | struct sm501_gpio_chip *chip) |
| 996 | { |
| 997 | struct sm501_platdata *pdata = sm->platdata; |
| 998 | struct gpio_chip *gchip = &chip->gpio; |
Arnaud Patard | 60e540d | 2008-07-25 01:46:00 -0700 | [diff] [blame^] | 999 | int base = pdata->gpio_base; |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 1000 | |
| 1001 | memcpy(chip, &gpio_chip_template, sizeof(struct gpio_chip)); |
| 1002 | |
| 1003 | if (chip == &gpio->high) { |
Arnaud Patard | 60e540d | 2008-07-25 01:46:00 -0700 | [diff] [blame^] | 1004 | if (base > 0) |
| 1005 | base += 32; |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 1006 | chip->regbase = gpio->regs + SM501_GPIO_DATA_HIGH; |
| 1007 | gchip->label = "SM501-HIGH"; |
| 1008 | } else { |
| 1009 | chip->regbase = gpio->regs + SM501_GPIO_DATA_LOW; |
| 1010 | gchip->label = "SM501-LOW"; |
| 1011 | } |
| 1012 | |
| 1013 | gchip->base = base; |
| 1014 | chip->ourgpio = gpio; |
| 1015 | |
| 1016 | return gpiochip_add(gchip); |
| 1017 | } |
| 1018 | |
| 1019 | static int sm501_register_gpio(struct sm501_devdata *sm) |
| 1020 | { |
| 1021 | struct sm501_gpio *gpio = &sm->gpio; |
| 1022 | resource_size_t iobase = sm->io_res->start + SM501_GPIO; |
| 1023 | int ret; |
| 1024 | int tmp; |
| 1025 | |
| 1026 | dev_dbg(sm->dev, "registering gpio block %08llx\n", |
| 1027 | (unsigned long long)iobase); |
| 1028 | |
| 1029 | spin_lock_init(&gpio->lock); |
| 1030 | |
| 1031 | gpio->regs_res = request_mem_region(iobase, 0x20, "sm501-gpio"); |
| 1032 | if (gpio->regs_res == NULL) { |
| 1033 | dev_err(sm->dev, "gpio: failed to request region\n"); |
| 1034 | return -ENXIO; |
| 1035 | } |
| 1036 | |
| 1037 | gpio->regs = ioremap(iobase, 0x20); |
| 1038 | if (gpio->regs == NULL) { |
| 1039 | dev_err(sm->dev, "gpio: failed to remap registers\n"); |
| 1040 | ret = -ENXIO; |
| 1041 | goto err_mapped; |
| 1042 | } |
| 1043 | |
| 1044 | /* Register both our chips. */ |
| 1045 | |
| 1046 | ret = sm501_gpio_register_chip(sm, gpio, &gpio->low); |
| 1047 | if (ret) { |
| 1048 | dev_err(sm->dev, "failed to add low chip\n"); |
| 1049 | goto err_mapped; |
| 1050 | } |
| 1051 | |
| 1052 | ret = sm501_gpio_register_chip(sm, gpio, &gpio->high); |
| 1053 | if (ret) { |
| 1054 | dev_err(sm->dev, "failed to add high chip\n"); |
| 1055 | goto err_low_chip; |
| 1056 | } |
| 1057 | |
| 1058 | gpio->registered = 1; |
| 1059 | |
| 1060 | return 0; |
| 1061 | |
| 1062 | err_low_chip: |
| 1063 | tmp = gpiochip_remove(&gpio->low.gpio); |
| 1064 | if (tmp) { |
| 1065 | dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n"); |
| 1066 | return ret; |
| 1067 | } |
| 1068 | |
| 1069 | err_mapped: |
| 1070 | release_resource(gpio->regs_res); |
| 1071 | kfree(gpio->regs_res); |
| 1072 | |
| 1073 | return ret; |
| 1074 | } |
| 1075 | |
| 1076 | static void sm501_gpio_remove(struct sm501_devdata *sm) |
| 1077 | { |
| 1078 | int ret; |
| 1079 | |
| 1080 | ret = gpiochip_remove(&sm->gpio.low.gpio); |
| 1081 | if (ret) |
| 1082 | dev_err(sm->dev, "cannot remove low chip, cannot tidy up\n"); |
| 1083 | |
| 1084 | ret = gpiochip_remove(&sm->gpio.high.gpio); |
| 1085 | if (ret) |
| 1086 | dev_err(sm->dev, "cannot remove high chip, cannot tidy up\n"); |
| 1087 | } |
| 1088 | |
| 1089 | #else |
| 1090 | static int sm501_register_gpio(struct sm501_devdata *sm) |
| 1091 | { |
| 1092 | return 0; |
| 1093 | } |
| 1094 | |
| 1095 | static void sm501_gpio_remove(struct sm501_devdata *sm) |
| 1096 | { |
| 1097 | } |
| 1098 | #endif |
| 1099 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1100 | /* sm501_dbg_regs |
| 1101 | * |
| 1102 | * Debug attribute to attach to parent device to show core registers |
| 1103 | */ |
| 1104 | |
| 1105 | static ssize_t sm501_dbg_regs(struct device *dev, |
| 1106 | struct device_attribute *attr, char *buff) |
| 1107 | { |
| 1108 | struct sm501_devdata *sm = dev_get_drvdata(dev) ; |
| 1109 | unsigned int reg; |
| 1110 | char *ptr = buff; |
| 1111 | int ret; |
| 1112 | |
| 1113 | for (reg = 0x00; reg < 0x70; reg += 4) { |
| 1114 | ret = sprintf(ptr, "%08x = %08x\n", |
| 1115 | reg, readl(sm->regs + reg)); |
| 1116 | ptr += ret; |
| 1117 | } |
| 1118 | |
| 1119 | return ptr - buff; |
| 1120 | } |
| 1121 | |
| 1122 | |
| 1123 | static DEVICE_ATTR(dbg_regs, 0666, sm501_dbg_regs, NULL); |
| 1124 | |
| 1125 | /* sm501_init_reg |
| 1126 | * |
| 1127 | * Helper function for the init code to setup a register |
Ben Dooks | 5136237 | 2007-06-23 17:16:29 -0700 | [diff] [blame] | 1128 | * |
| 1129 | * clear the bits which are set in r->mask, and then set |
| 1130 | * the bits set in r->set. |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1131 | */ |
| 1132 | |
| 1133 | static inline void sm501_init_reg(struct sm501_devdata *sm, |
| 1134 | unsigned long reg, |
| 1135 | struct sm501_reg_init *r) |
| 1136 | { |
| 1137 | unsigned long tmp; |
| 1138 | |
| 1139 | tmp = readl(sm->regs + reg); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1140 | tmp &= ~r->mask; |
Ben Dooks | 5136237 | 2007-06-23 17:16:29 -0700 | [diff] [blame] | 1141 | tmp |= r->set; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1142 | writel(tmp, sm->regs + reg); |
| 1143 | } |
| 1144 | |
| 1145 | /* sm501_init_regs |
| 1146 | * |
| 1147 | * Setup core register values |
| 1148 | */ |
| 1149 | |
| 1150 | static void sm501_init_regs(struct sm501_devdata *sm, |
| 1151 | struct sm501_initdata *init) |
| 1152 | { |
| 1153 | sm501_misc_control(sm->dev, |
| 1154 | init->misc_control.set, |
| 1155 | init->misc_control.mask); |
| 1156 | |
| 1157 | sm501_init_reg(sm, SM501_MISC_TIMING, &init->misc_timing); |
| 1158 | sm501_init_reg(sm, SM501_GPIO31_0_CONTROL, &init->gpio_low); |
| 1159 | sm501_init_reg(sm, SM501_GPIO63_32_CONTROL, &init->gpio_high); |
| 1160 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1161 | if (init->m1xclk) { |
| 1162 | dev_info(sm->dev, "setting M1XCLK to %ld\n", init->m1xclk); |
| 1163 | sm501_set_clock(sm->dev, SM501_CLOCK_M1XCLK, init->m1xclk); |
| 1164 | } |
Ben Dooks | b5913bb | 2007-06-23 17:16:29 -0700 | [diff] [blame] | 1165 | |
| 1166 | if (init->mclk) { |
| 1167 | dev_info(sm->dev, "setting MCLK to %ld\n", init->mclk); |
| 1168 | sm501_set_clock(sm->dev, SM501_CLOCK_MCLK, init->mclk); |
| 1169 | } |
Ben Dooks | 8190622 | 2007-06-23 17:16:30 -0700 | [diff] [blame] | 1170 | |
| 1171 | } |
| 1172 | |
| 1173 | /* Check the PLL sources for the M1CLK and M1XCLK |
| 1174 | * |
| 1175 | * If the M1CLK and M1XCLKs are not sourced from the same PLL, then |
| 1176 | * there is a risk (see errata AB-5) that the SM501 will cease proper |
| 1177 | * function. If this happens, then it is likely the SM501 will |
| 1178 | * hang the system. |
| 1179 | */ |
| 1180 | |
| 1181 | static int sm501_check_clocks(struct sm501_devdata *sm) |
| 1182 | { |
| 1183 | unsigned long pwrmode = readl(sm->regs + SM501_CURRENT_CLOCK); |
| 1184 | unsigned long msrc = (pwrmode & SM501_POWERMODE_M_SRC); |
| 1185 | unsigned long m1src = (pwrmode & SM501_POWERMODE_M1_SRC); |
| 1186 | |
| 1187 | return ((msrc == 0 && m1src != 0) || (msrc != 0 && m1src == 0)); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1188 | } |
| 1189 | |
| 1190 | static unsigned int sm501_mem_local[] = { |
| 1191 | [0] = 4*1024*1024, |
| 1192 | [1] = 8*1024*1024, |
| 1193 | [2] = 16*1024*1024, |
| 1194 | [3] = 32*1024*1024, |
| 1195 | [4] = 64*1024*1024, |
| 1196 | [5] = 2*1024*1024, |
| 1197 | }; |
| 1198 | |
| 1199 | /* sm501_init_dev |
| 1200 | * |
| 1201 | * Common init code for an SM501 |
| 1202 | */ |
| 1203 | |
| 1204 | static int sm501_init_dev(struct sm501_devdata *sm) |
| 1205 | { |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 1206 | struct sm501_initdata *idata; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1207 | resource_size_t mem_avail; |
| 1208 | unsigned long dramctrl; |
Ben Dooks | 1e27dbe | 2007-06-23 17:16:31 -0700 | [diff] [blame] | 1209 | unsigned long devid; |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1210 | int ret; |
| 1211 | |
| 1212 | mutex_init(&sm->clock_lock); |
| 1213 | spin_lock_init(&sm->reg_lock); |
| 1214 | |
| 1215 | INIT_LIST_HEAD(&sm->devices); |
| 1216 | |
Ben Dooks | 1e27dbe | 2007-06-23 17:16:31 -0700 | [diff] [blame] | 1217 | devid = readl(sm->regs + SM501_DEVICEID); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1218 | |
Ben Dooks | 1e27dbe | 2007-06-23 17:16:31 -0700 | [diff] [blame] | 1219 | if ((devid & SM501_DEVICEID_IDMASK) != SM501_DEVICEID_SM501) { |
| 1220 | dev_err(sm->dev, "incorrect device id %08lx\n", devid); |
| 1221 | return -EINVAL; |
| 1222 | } |
| 1223 | |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 1224 | /* disable irqs */ |
| 1225 | writel(0, sm->regs + SM501_IRQ_MASK); |
| 1226 | |
Ben Dooks | 1e27dbe | 2007-06-23 17:16:31 -0700 | [diff] [blame] | 1227 | dramctrl = readl(sm->regs + SM501_DRAM_CONTROL); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1228 | mem_avail = sm501_mem_local[(dramctrl >> 13) & 0x7]; |
| 1229 | |
Ben Dooks | 1e27dbe | 2007-06-23 17:16:31 -0700 | [diff] [blame] | 1230 | dev_info(sm->dev, "SM501 At %p: Version %08lx, %ld Mb, IRQ %d\n", |
| 1231 | sm->regs, devid, (unsigned long)mem_avail >> 20, sm->irq); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1232 | |
Ville Syrjala | 3149be5 | 2008-03-04 14:28:50 -0800 | [diff] [blame] | 1233 | sm->rev = devid & SM501_DEVICEID_REVMASK; |
| 1234 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 1235 | sm501_dump_gate(sm); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1236 | |
| 1237 | ret = device_create_file(sm->dev, &dev_attr_dbg_regs); |
| 1238 | if (ret) |
| 1239 | dev_err(sm->dev, "failed to create debug regs file\n"); |
| 1240 | |
| 1241 | sm501_dump_clk(sm); |
| 1242 | |
| 1243 | /* check to see if we have some device initialisation */ |
| 1244 | |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 1245 | idata = sm->platdata ? sm->platdata->init : NULL; |
| 1246 | if (idata) { |
| 1247 | sm501_init_regs(sm, idata); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1248 | |
Magnus Damm | 61711f8 | 2008-04-28 02:14:22 -0700 | [diff] [blame] | 1249 | if (idata->devices & SM501_USE_USB_HOST) |
| 1250 | sm501_register_usbhost(sm, &mem_avail); |
| 1251 | if (idata->devices & (SM501_USE_UART0 | SM501_USE_UART1)) |
| 1252 | sm501_register_uart(sm, idata->devices); |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 1253 | if (idata->devices & SM501_USE_GPIO) |
| 1254 | sm501_register_gpio(sm); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1255 | } |
| 1256 | |
Ben Dooks | 8190622 | 2007-06-23 17:16:30 -0700 | [diff] [blame] | 1257 | ret = sm501_check_clocks(sm); |
| 1258 | if (ret) { |
| 1259 | dev_err(sm->dev, "M1X and M clocks sourced from different " |
| 1260 | "PLLs\n"); |
| 1261 | return -EINVAL; |
| 1262 | } |
| 1263 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1264 | /* always create a framebuffer */ |
| 1265 | sm501_register_display(sm, &mem_avail); |
| 1266 | |
| 1267 | return 0; |
| 1268 | } |
| 1269 | |
| 1270 | static int sm501_plat_probe(struct platform_device *dev) |
| 1271 | { |
| 1272 | struct sm501_devdata *sm; |
| 1273 | int err; |
| 1274 | |
| 1275 | sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL); |
| 1276 | if (sm == NULL) { |
| 1277 | dev_err(&dev->dev, "no memory for device data\n"); |
| 1278 | err = -ENOMEM; |
| 1279 | goto err1; |
| 1280 | } |
| 1281 | |
| 1282 | sm->dev = &dev->dev; |
| 1283 | sm->pdev_id = dev->id; |
| 1284 | sm->irq = platform_get_irq(dev, 0); |
| 1285 | sm->io_res = platform_get_resource(dev, IORESOURCE_MEM, 1); |
| 1286 | sm->mem_res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
| 1287 | sm->platdata = dev->dev.platform_data; |
| 1288 | |
| 1289 | if (sm->irq < 0) { |
| 1290 | dev_err(&dev->dev, "failed to get irq resource\n"); |
| 1291 | err = sm->irq; |
| 1292 | goto err_res; |
| 1293 | } |
| 1294 | |
| 1295 | if (sm->io_res == NULL || sm->mem_res == NULL) { |
| 1296 | dev_err(&dev->dev, "failed to get IO resource\n"); |
| 1297 | err = -ENOENT; |
| 1298 | goto err_res; |
| 1299 | } |
| 1300 | |
| 1301 | sm->regs_claim = request_mem_region(sm->io_res->start, |
| 1302 | 0x100, "sm501"); |
| 1303 | |
| 1304 | if (sm->regs_claim == NULL) { |
| 1305 | dev_err(&dev->dev, "cannot claim registers\n"); |
| 1306 | err= -EBUSY; |
| 1307 | goto err_res; |
| 1308 | } |
| 1309 | |
| 1310 | platform_set_drvdata(dev, sm); |
| 1311 | |
| 1312 | sm->regs = ioremap(sm->io_res->start, |
| 1313 | (sm->io_res->end - sm->io_res->start) - 1); |
| 1314 | |
| 1315 | if (sm->regs == NULL) { |
| 1316 | dev_err(&dev->dev, "cannot remap registers\n"); |
| 1317 | err = -EIO; |
| 1318 | goto err_claim; |
| 1319 | } |
| 1320 | |
| 1321 | return sm501_init_dev(sm); |
| 1322 | |
| 1323 | err_claim: |
| 1324 | release_resource(sm->regs_claim); |
| 1325 | kfree(sm->regs_claim); |
| 1326 | err_res: |
| 1327 | kfree(sm); |
| 1328 | err1: |
| 1329 | return err; |
| 1330 | |
| 1331 | } |
| 1332 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 1333 | #ifdef CONFIG_PM |
Ben Dooks | 472dba7 | 2008-07-25 01:45:58 -0700 | [diff] [blame] | 1334 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 1335 | /* power management support */ |
| 1336 | |
Ben Dooks | 472dba7 | 2008-07-25 01:45:58 -0700 | [diff] [blame] | 1337 | static void sm501_set_power(struct sm501_devdata *sm, int on) |
| 1338 | { |
| 1339 | struct sm501_platdata *pd = sm->platdata; |
| 1340 | |
| 1341 | if (pd == NULL) |
| 1342 | return; |
| 1343 | |
| 1344 | if (pd->get_power) { |
| 1345 | if (pd->get_power(sm->dev) == on) { |
| 1346 | dev_dbg(sm->dev, "is already %d\n", on); |
| 1347 | return; |
| 1348 | } |
| 1349 | } |
| 1350 | |
| 1351 | if (pd->set_power) { |
| 1352 | dev_dbg(sm->dev, "setting power to %d\n", on); |
| 1353 | |
| 1354 | pd->set_power(sm->dev, on); |
| 1355 | sm501_mdelay(sm, 10); |
| 1356 | } |
| 1357 | } |
| 1358 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 1359 | static int sm501_plat_suspend(struct platform_device *pdev, pm_message_t state) |
| 1360 | { |
| 1361 | struct sm501_devdata *sm = platform_get_drvdata(pdev); |
| 1362 | |
| 1363 | sm->in_suspend = 1; |
| 1364 | sm->pm_misc = readl(sm->regs + SM501_MISC_CONTROL); |
| 1365 | |
| 1366 | sm501_dump_regs(sm); |
Ben Dooks | 472dba7 | 2008-07-25 01:45:58 -0700 | [diff] [blame] | 1367 | |
| 1368 | if (sm->platdata) { |
| 1369 | if (sm->platdata->flags & SM501_FLAG_SUSPEND_OFF) |
| 1370 | sm501_set_power(sm, 0); |
| 1371 | } |
| 1372 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 1373 | return 0; |
| 1374 | } |
| 1375 | |
| 1376 | static int sm501_plat_resume(struct platform_device *pdev) |
| 1377 | { |
| 1378 | struct sm501_devdata *sm = platform_get_drvdata(pdev); |
| 1379 | |
Ben Dooks | 472dba7 | 2008-07-25 01:45:58 -0700 | [diff] [blame] | 1380 | sm501_set_power(sm, 1); |
| 1381 | |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 1382 | sm501_dump_regs(sm); |
| 1383 | sm501_dump_gate(sm); |
| 1384 | sm501_dump_clk(sm); |
| 1385 | |
| 1386 | /* check to see if we are in the same state as when suspended */ |
| 1387 | |
| 1388 | if (readl(sm->regs + SM501_MISC_CONTROL) != sm->pm_misc) { |
| 1389 | dev_info(sm->dev, "SM501_MISC_CONTROL changed over sleep\n"); |
| 1390 | writel(sm->pm_misc, sm->regs + SM501_MISC_CONTROL); |
| 1391 | |
| 1392 | /* our suspend causes the controller state to change, |
| 1393 | * either by something attempting setup, power loss, |
| 1394 | * or an external reset event on power change */ |
| 1395 | |
| 1396 | if (sm->platdata && sm->platdata->init) { |
| 1397 | sm501_init_regs(sm, sm->platdata->init); |
| 1398 | } |
| 1399 | } |
| 1400 | |
| 1401 | /* dump our state from resume */ |
| 1402 | |
| 1403 | sm501_dump_regs(sm); |
| 1404 | sm501_dump_clk(sm); |
| 1405 | |
| 1406 | sm->in_suspend = 0; |
| 1407 | |
| 1408 | return 0; |
| 1409 | } |
| 1410 | #else |
| 1411 | #define sm501_plat_suspend NULL |
| 1412 | #define sm501_plat_resume NULL |
| 1413 | #endif |
| 1414 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1415 | /* Initialisation data for PCI devices */ |
| 1416 | |
| 1417 | static struct sm501_initdata sm501_pci_initdata = { |
| 1418 | .gpio_high = { |
| 1419 | .set = 0x3F000000, /* 24bit panel */ |
| 1420 | .mask = 0x0, |
| 1421 | }, |
| 1422 | .misc_timing = { |
| 1423 | .set = 0x010100, /* SDRAM timing */ |
| 1424 | .mask = 0x1F1F00, |
| 1425 | }, |
| 1426 | .misc_control = { |
| 1427 | .set = SM501_MISC_PNL_24BIT, |
| 1428 | .mask = 0, |
| 1429 | }, |
| 1430 | |
| 1431 | .devices = SM501_USE_ALL, |
Ben Dooks | 8190622 | 2007-06-23 17:16:30 -0700 | [diff] [blame] | 1432 | |
| 1433 | /* Errata AB-3 says that 72MHz is the fastest available |
| 1434 | * for 33MHZ PCI with proper bus-mastering operation */ |
| 1435 | |
| 1436 | .mclk = 72 * MHZ, |
| 1437 | .m1xclk = 144 * MHZ, |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1438 | }; |
| 1439 | |
| 1440 | static struct sm501_platdata_fbsub sm501_pdata_fbsub = { |
| 1441 | .flags = (SM501FB_FLAG_USE_INIT_MODE | |
| 1442 | SM501FB_FLAG_USE_HWCURSOR | |
| 1443 | SM501FB_FLAG_USE_HWACCEL | |
| 1444 | SM501FB_FLAG_DISABLE_AT_EXIT), |
| 1445 | }; |
| 1446 | |
| 1447 | static struct sm501_platdata_fb sm501_fb_pdata = { |
| 1448 | .fb_route = SM501_FB_OWN, |
| 1449 | .fb_crt = &sm501_pdata_fbsub, |
| 1450 | .fb_pnl = &sm501_pdata_fbsub, |
| 1451 | }; |
| 1452 | |
| 1453 | static struct sm501_platdata sm501_pci_platdata = { |
| 1454 | .init = &sm501_pci_initdata, |
| 1455 | .fb = &sm501_fb_pdata, |
Arnaud Patard | 60e540d | 2008-07-25 01:46:00 -0700 | [diff] [blame^] | 1456 | .gpio_base = -1, |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1457 | }; |
| 1458 | |
| 1459 | static int sm501_pci_probe(struct pci_dev *dev, |
| 1460 | const struct pci_device_id *id) |
| 1461 | { |
| 1462 | struct sm501_devdata *sm; |
| 1463 | int err; |
| 1464 | |
| 1465 | sm = kzalloc(sizeof(struct sm501_devdata), GFP_KERNEL); |
| 1466 | if (sm == NULL) { |
| 1467 | dev_err(&dev->dev, "no memory for device data\n"); |
| 1468 | err = -ENOMEM; |
| 1469 | goto err1; |
| 1470 | } |
| 1471 | |
| 1472 | /* set a default set of platform data */ |
| 1473 | dev->dev.platform_data = sm->platdata = &sm501_pci_platdata; |
| 1474 | |
| 1475 | /* set a hopefully unique id for our child platform devices */ |
| 1476 | sm->pdev_id = 32 + dev->devfn; |
| 1477 | |
| 1478 | pci_set_drvdata(dev, sm); |
| 1479 | |
| 1480 | err = pci_enable_device(dev); |
| 1481 | if (err) { |
| 1482 | dev_err(&dev->dev, "cannot enable device\n"); |
| 1483 | goto err2; |
| 1484 | } |
| 1485 | |
| 1486 | sm->dev = &dev->dev; |
| 1487 | sm->irq = dev->irq; |
| 1488 | |
| 1489 | #ifdef __BIG_ENDIAN |
| 1490 | /* if the system is big-endian, we most probably have a |
| 1491 | * translation in the IO layer making the PCI bus little endian |
| 1492 | * so make the framebuffer swapped pixels */ |
| 1493 | |
| 1494 | sm501_fb_pdata.flags |= SM501_FBPD_SWAP_FB_ENDIAN; |
| 1495 | #endif |
| 1496 | |
| 1497 | /* check our resources */ |
| 1498 | |
| 1499 | if (!(pci_resource_flags(dev, 0) & IORESOURCE_MEM)) { |
| 1500 | dev_err(&dev->dev, "region #0 is not memory?\n"); |
| 1501 | err = -EINVAL; |
| 1502 | goto err3; |
| 1503 | } |
| 1504 | |
| 1505 | if (!(pci_resource_flags(dev, 1) & IORESOURCE_MEM)) { |
| 1506 | dev_err(&dev->dev, "region #1 is not memory?\n"); |
| 1507 | err = -EINVAL; |
| 1508 | goto err3; |
| 1509 | } |
| 1510 | |
| 1511 | /* make our resources ready for sharing */ |
| 1512 | |
| 1513 | sm->io_res = &dev->resource[1]; |
| 1514 | sm->mem_res = &dev->resource[0]; |
| 1515 | |
| 1516 | sm->regs_claim = request_mem_region(sm->io_res->start, |
| 1517 | 0x100, "sm501"); |
| 1518 | if (sm->regs_claim == NULL) { |
| 1519 | dev_err(&dev->dev, "cannot claim registers\n"); |
| 1520 | err= -EBUSY; |
| 1521 | goto err3; |
| 1522 | } |
| 1523 | |
| 1524 | sm->regs = ioremap(pci_resource_start(dev, 1), |
| 1525 | pci_resource_len(dev, 1)); |
| 1526 | |
| 1527 | if (sm->regs == NULL) { |
| 1528 | dev_err(&dev->dev, "cannot remap registers\n"); |
| 1529 | err = -EIO; |
| 1530 | goto err4; |
| 1531 | } |
| 1532 | |
| 1533 | sm501_init_dev(sm); |
| 1534 | return 0; |
| 1535 | |
| 1536 | err4: |
| 1537 | release_resource(sm->regs_claim); |
| 1538 | kfree(sm->regs_claim); |
| 1539 | err3: |
| 1540 | pci_disable_device(dev); |
| 1541 | err2: |
| 1542 | pci_set_drvdata(dev, NULL); |
| 1543 | kfree(sm); |
| 1544 | err1: |
| 1545 | return err; |
| 1546 | } |
| 1547 | |
| 1548 | static void sm501_remove_sub(struct sm501_devdata *sm, |
| 1549 | struct sm501_device *smdev) |
| 1550 | { |
| 1551 | list_del(&smdev->list); |
| 1552 | platform_device_unregister(&smdev->pdev); |
| 1553 | } |
| 1554 | |
| 1555 | static void sm501_dev_remove(struct sm501_devdata *sm) |
| 1556 | { |
| 1557 | struct sm501_device *smdev, *tmp; |
| 1558 | |
| 1559 | list_for_each_entry_safe(smdev, tmp, &sm->devices, list) |
| 1560 | sm501_remove_sub(sm, smdev); |
| 1561 | |
| 1562 | device_remove_file(sm->dev, &dev_attr_dbg_regs); |
Ben Dooks | f61be27 | 2008-07-25 01:45:59 -0700 | [diff] [blame] | 1563 | |
| 1564 | if (sm->gpio.registered) |
| 1565 | sm501_gpio_remove(sm); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1566 | } |
| 1567 | |
| 1568 | static void sm501_pci_remove(struct pci_dev *dev) |
| 1569 | { |
| 1570 | struct sm501_devdata *sm = pci_get_drvdata(dev); |
| 1571 | |
| 1572 | sm501_dev_remove(sm); |
| 1573 | iounmap(sm->regs); |
| 1574 | |
| 1575 | release_resource(sm->regs_claim); |
| 1576 | kfree(sm->regs_claim); |
| 1577 | |
| 1578 | pci_set_drvdata(dev, NULL); |
| 1579 | pci_disable_device(dev); |
| 1580 | } |
| 1581 | |
| 1582 | static int sm501_plat_remove(struct platform_device *dev) |
| 1583 | { |
| 1584 | struct sm501_devdata *sm = platform_get_drvdata(dev); |
| 1585 | |
| 1586 | sm501_dev_remove(sm); |
| 1587 | iounmap(sm->regs); |
| 1588 | |
| 1589 | release_resource(sm->regs_claim); |
| 1590 | kfree(sm->regs_claim); |
| 1591 | |
| 1592 | return 0; |
| 1593 | } |
| 1594 | |
| 1595 | static struct pci_device_id sm501_pci_tbl[] = { |
| 1596 | { 0x126f, 0x0501, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 }, |
| 1597 | { 0, }, |
| 1598 | }; |
| 1599 | |
| 1600 | MODULE_DEVICE_TABLE(pci, sm501_pci_tbl); |
| 1601 | |
| 1602 | static struct pci_driver sm501_pci_drv = { |
| 1603 | .name = "sm501", |
| 1604 | .id_table = sm501_pci_tbl, |
| 1605 | .probe = sm501_pci_probe, |
| 1606 | .remove = sm501_pci_remove, |
| 1607 | }; |
| 1608 | |
Kay Sievers | 4f46d6e | 2008-07-25 01:45:47 -0700 | [diff] [blame] | 1609 | MODULE_ALIAS("platform:sm501"); |
| 1610 | |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1611 | static struct platform_driver sm501_plat_drv = { |
| 1612 | .driver = { |
| 1613 | .name = "sm501", |
| 1614 | .owner = THIS_MODULE, |
| 1615 | }, |
| 1616 | .probe = sm501_plat_probe, |
| 1617 | .remove = sm501_plat_remove, |
Ben Dooks | 331d747 | 2007-06-23 17:16:28 -0700 | [diff] [blame] | 1618 | .suspend = sm501_plat_suspend, |
| 1619 | .resume = sm501_plat_resume, |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1620 | }; |
| 1621 | |
| 1622 | static int __init sm501_base_init(void) |
| 1623 | { |
| 1624 | platform_driver_register(&sm501_plat_drv); |
Richard Knutsson | f15e66b | 2007-02-24 11:46:06 +0100 | [diff] [blame] | 1625 | return pci_register_driver(&sm501_pci_drv); |
Ben Dooks | b6d6454 | 2007-02-20 13:58:01 -0800 | [diff] [blame] | 1626 | } |
| 1627 | |
| 1628 | static void __exit sm501_base_exit(void) |
| 1629 | { |
| 1630 | platform_driver_unregister(&sm501_plat_drv); |
| 1631 | pci_unregister_driver(&sm501_pci_drv); |
| 1632 | } |
| 1633 | |
| 1634 | module_init(sm501_base_init); |
| 1635 | module_exit(sm501_base_exit); |
| 1636 | |
| 1637 | MODULE_DESCRIPTION("SM501 Core Driver"); |
| 1638 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>, Vincent Sanders"); |
| 1639 | MODULE_LICENSE("GPL v2"); |