eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-pxa/pxa3xx.c |
| 3 | * |
| 4 | * code specific to pxa3xx aka Monahans |
| 5 | * |
| 6 | * Copyright (C) 2006 Marvell International Ltd. |
| 7 | * |
eric miao | e9bba8e | 2007-10-30 08:01:38 +0100 | [diff] [blame] | 8 | * 2007-09-02: eric miao <eric.miao@marvell.com> |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 9 | * initial version |
| 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 version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | */ |
| 15 | |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/init.h> |
| 19 | #include <linux/pm.h> |
| 20 | #include <linux/platform_device.h> |
| 21 | #include <linux/irq.h> |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 22 | #include <linux/io.h> |
eric miao | c0165504 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 23 | #include <linux/sysdev.h> |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 24 | |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 25 | #include <mach/hardware.h> |
Eric Miao | a58fbcd | 2009-01-06 17:37:37 +0800 | [diff] [blame] | 26 | #include <mach/gpio.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 27 | #include <mach/pxa3xx-regs.h> |
Russell King | afd2fc0 | 2008-08-07 11:05:25 +0100 | [diff] [blame] | 28 | #include <mach/reset.h> |
Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 29 | #include <mach/ohci.h> |
| 30 | #include <mach/pm.h> |
| 31 | #include <mach/dma.h> |
| 32 | #include <mach/ssp.h> |
Eric Miao | f0a8370 | 2009-04-13 15:03:11 +0800 | [diff] [blame] | 33 | #include <plat/i2c.h> |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 34 | |
| 35 | #include "generic.h" |
| 36 | #include "devices.h" |
| 37 | #include "clock.h" |
| 38 | |
| 39 | /* Crystal clock: 13MHz */ |
| 40 | #define BASE_CLK 13000000 |
| 41 | |
| 42 | /* Ring Oscillator Clock: 60MHz */ |
| 43 | #define RO_CLK 60000000 |
| 44 | |
| 45 | #define ACCR_D0CS (1 << 26) |
eric miao | c4d1fb6 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 46 | #define ACCR_PCCE (1 << 11) |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 47 | |
| 48 | /* crystal frequency to static memory controller multiplier (SMCFS) */ |
| 49 | static unsigned char smcfs_mult[8] = { 6, 0, 8, 0, 0, 16, }; |
| 50 | |
| 51 | /* crystal frequency to HSIO bus frequency multiplier (HSS) */ |
| 52 | static unsigned char hss_mult[4] = { 8, 12, 16, 0 }; |
| 53 | |
| 54 | /* |
| 55 | * Get the clock frequency as reflected by CCSR and the turbo flag. |
| 56 | * We assume these values have been applied via a fcs. |
| 57 | * If info is not 0 we also display the current settings. |
| 58 | */ |
| 59 | unsigned int pxa3xx_get_clk_frequency_khz(int info) |
| 60 | { |
| 61 | unsigned long acsr, xclkcfg; |
| 62 | unsigned int t, xl, xn, hss, ro, XL, XN, CLK, HSS; |
| 63 | |
| 64 | /* Read XCLKCFG register turbo bit */ |
| 65 | __asm__ __volatile__("mrc\tp14, 0, %0, c6, c0, 0" : "=r"(xclkcfg)); |
| 66 | t = xclkcfg & 0x1; |
| 67 | |
| 68 | acsr = ACSR; |
| 69 | |
| 70 | xl = acsr & 0x1f; |
| 71 | xn = (acsr >> 8) & 0x7; |
| 72 | hss = (acsr >> 14) & 0x3; |
| 73 | |
| 74 | XL = xl * BASE_CLK; |
| 75 | XN = xn * XL; |
| 76 | |
| 77 | ro = acsr & ACCR_D0CS; |
| 78 | |
| 79 | CLK = (ro) ? RO_CLK : ((t) ? XN : XL); |
| 80 | HSS = (ro) ? RO_CLK : hss_mult[hss] * BASE_CLK; |
| 81 | |
| 82 | if (info) { |
| 83 | pr_info("RO Mode clock: %d.%02dMHz (%sactive)\n", |
| 84 | RO_CLK / 1000000, (RO_CLK % 1000000) / 10000, |
| 85 | (ro) ? "" : "in"); |
| 86 | pr_info("Run Mode clock: %d.%02dMHz (*%d)\n", |
| 87 | XL / 1000000, (XL % 1000000) / 10000, xl); |
| 88 | pr_info("Turbo Mode clock: %d.%02dMHz (*%d, %sactive)\n", |
| 89 | XN / 1000000, (XN % 1000000) / 10000, xn, |
| 90 | (t) ? "" : "in"); |
| 91 | pr_info("HSIO bus clock: %d.%02dMHz\n", |
| 92 | HSS / 1000000, (HSS % 1000000) / 10000); |
| 93 | } |
| 94 | |
eric miao | 6232be3 | 2008-01-24 02:27:30 +0100 | [diff] [blame] | 95 | return CLK / 1000; |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | /* |
| 99 | * Return the current static memory controller clock frequency |
| 100 | * in units of 10kHz |
| 101 | */ |
| 102 | unsigned int pxa3xx_get_memclk_frequency_10khz(void) |
| 103 | { |
| 104 | unsigned long acsr; |
| 105 | unsigned int smcfs, clk = 0; |
| 106 | |
| 107 | acsr = ACSR; |
| 108 | |
| 109 | smcfs = (acsr >> 23) & 0x7; |
| 110 | clk = (acsr & ACCR_D0CS) ? RO_CLK : smcfs_mult[smcfs] * BASE_CLK; |
| 111 | |
| 112 | return (clk / 10000); |
| 113 | } |
| 114 | |
Eric Miao | 04fef22 | 2008-07-29 14:26:00 +0800 | [diff] [blame] | 115 | void pxa3xx_clear_reset_status(unsigned int mask) |
| 116 | { |
| 117 | /* RESET_STATUS_* has a 1:1 mapping with ARSR */ |
| 118 | ARSR = mask; |
| 119 | } |
| 120 | |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 121 | /* |
Mark Brown | 60bfe7f | 2008-03-04 11:14:23 +0100 | [diff] [blame] | 122 | * Return the current AC97 clock frequency. |
| 123 | */ |
| 124 | static unsigned long clk_pxa3xx_ac97_getrate(struct clk *clk) |
| 125 | { |
| 126 | unsigned long rate = 312000000; |
| 127 | unsigned long ac97_div; |
| 128 | |
| 129 | ac97_div = AC97_DIV; |
| 130 | |
| 131 | /* This may loose precision for some rates but won't for the |
| 132 | * standard 24.576MHz. |
| 133 | */ |
| 134 | rate /= (ac97_div >> 12) & 0x7fff; |
| 135 | rate *= (ac97_div & 0xfff); |
| 136 | |
| 137 | return rate; |
| 138 | } |
| 139 | |
| 140 | /* |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 141 | * Return the current HSIO bus clock frequency |
| 142 | */ |
| 143 | static unsigned long clk_pxa3xx_hsio_getrate(struct clk *clk) |
| 144 | { |
| 145 | unsigned long acsr; |
| 146 | unsigned int hss, hsio_clk; |
| 147 | |
| 148 | acsr = ACSR; |
| 149 | |
| 150 | hss = (acsr >> 14) & 0x3; |
| 151 | hsio_clk = (acsr & ACCR_D0CS) ? RO_CLK : hss_mult[hss] * BASE_CLK; |
| 152 | |
| 153 | return hsio_clk; |
| 154 | } |
| 155 | |
eric miao | 7a2c5cb | 2008-02-19 11:13:31 +0800 | [diff] [blame] | 156 | void clk_pxa3xx_cken_enable(struct clk *clk) |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 157 | { |
| 158 | unsigned long mask = 1ul << (clk->cken & 0x1f); |
| 159 | |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 160 | if (clk->cken < 32) |
| 161 | CKENA |= mask; |
| 162 | else |
| 163 | CKENB |= mask; |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 164 | } |
| 165 | |
eric miao | 7a2c5cb | 2008-02-19 11:13:31 +0800 | [diff] [blame] | 166 | void clk_pxa3xx_cken_disable(struct clk *clk) |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 167 | { |
| 168 | unsigned long mask = 1ul << (clk->cken & 0x1f); |
| 169 | |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 170 | if (clk->cken < 32) |
| 171 | CKENA &= ~mask; |
| 172 | else |
| 173 | CKENB &= ~mask; |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 174 | } |
| 175 | |
eric miao | 7a2c5cb | 2008-02-19 11:13:31 +0800 | [diff] [blame] | 176 | const struct clkops clk_pxa3xx_cken_ops = { |
eric miao | 2a0d718 | 2007-10-30 08:10:18 +0100 | [diff] [blame] | 177 | .enable = clk_pxa3xx_cken_enable, |
| 178 | .disable = clk_pxa3xx_cken_disable, |
| 179 | }; |
| 180 | |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 181 | static const struct clkops clk_pxa3xx_hsio_ops = { |
| 182 | .enable = clk_pxa3xx_cken_enable, |
| 183 | .disable = clk_pxa3xx_cken_disable, |
| 184 | .getrate = clk_pxa3xx_hsio_getrate, |
| 185 | }; |
| 186 | |
Mark Brown | 60bfe7f | 2008-03-04 11:14:23 +0100 | [diff] [blame] | 187 | static const struct clkops clk_pxa3xx_ac97_ops = { |
| 188 | .enable = clk_pxa3xx_cken_enable, |
| 189 | .disable = clk_pxa3xx_cken_disable, |
| 190 | .getrate = clk_pxa3xx_ac97_getrate, |
| 191 | }; |
| 192 | |
Mark Brown | dcc88a1 | 2008-02-13 16:39:21 +0100 | [diff] [blame] | 193 | static void clk_pout_enable(struct clk *clk) |
| 194 | { |
| 195 | OSCC |= OSCC_PEN; |
| 196 | } |
| 197 | |
| 198 | static void clk_pout_disable(struct clk *clk) |
| 199 | { |
| 200 | OSCC &= ~OSCC_PEN; |
| 201 | } |
| 202 | |
| 203 | static const struct clkops clk_pout_ops = { |
| 204 | .enable = clk_pout_enable, |
| 205 | .disable = clk_pout_disable, |
| 206 | }; |
| 207 | |
Mike Rapoport | 9ba63c4 | 2008-08-17 06:23:05 +0100 | [diff] [blame] | 208 | static void clk_dummy_enable(struct clk *clk) |
| 209 | { |
| 210 | } |
| 211 | |
| 212 | static void clk_dummy_disable(struct clk *clk) |
| 213 | { |
| 214 | } |
| 215 | |
| 216 | static const struct clkops clk_dummy_ops = { |
| 217 | .enable = clk_dummy_enable, |
| 218 | .disable = clk_dummy_disable, |
| 219 | }; |
| 220 | |
Russell King | 8c3abc7 | 2008-11-08 20:25:21 +0000 | [diff] [blame] | 221 | static struct clk clk_pxa3xx_pout = { |
| 222 | .ops = &clk_pout_ops, |
| 223 | .rate = 13000000, |
| 224 | .delay = 70, |
| 225 | }; |
Mark Brown | dcc88a1 | 2008-02-13 16:39:21 +0100 | [diff] [blame] | 226 | |
Russell King | 8c3abc7 | 2008-11-08 20:25:21 +0000 | [diff] [blame] | 227 | static struct clk clk_dummy = { |
| 228 | .ops = &clk_dummy_ops, |
| 229 | }; |
| 230 | |
| 231 | static DEFINE_PXA3_CK(pxa3xx_lcd, LCD, &clk_pxa3xx_hsio_ops); |
| 232 | static DEFINE_PXA3_CK(pxa3xx_camera, CAMERA, &clk_pxa3xx_hsio_ops); |
| 233 | static DEFINE_PXA3_CK(pxa3xx_ac97, AC97, &clk_pxa3xx_ac97_ops); |
| 234 | static DEFINE_PXA3_CKEN(pxa3xx_ffuart, FFUART, 14857000, 1); |
| 235 | static DEFINE_PXA3_CKEN(pxa3xx_btuart, BTUART, 14857000, 1); |
| 236 | static DEFINE_PXA3_CKEN(pxa3xx_stuart, STUART, 14857000, 1); |
| 237 | static DEFINE_PXA3_CKEN(pxa3xx_i2c, I2C, 32842000, 0); |
| 238 | static DEFINE_PXA3_CKEN(pxa3xx_udc, UDC, 48000000, 5); |
| 239 | static DEFINE_PXA3_CKEN(pxa3xx_usbh, USBH, 48000000, 0); |
| 240 | static DEFINE_PXA3_CKEN(pxa3xx_keypad, KEYPAD, 32768, 0); |
| 241 | static DEFINE_PXA3_CKEN(pxa3xx_ssp1, SSP1, 13000000, 0); |
| 242 | static DEFINE_PXA3_CKEN(pxa3xx_ssp2, SSP2, 13000000, 0); |
| 243 | static DEFINE_PXA3_CKEN(pxa3xx_ssp3, SSP3, 13000000, 0); |
| 244 | static DEFINE_PXA3_CKEN(pxa3xx_ssp4, SSP4, 13000000, 0); |
| 245 | static DEFINE_PXA3_CKEN(pxa3xx_pwm0, PWM0, 13000000, 0); |
| 246 | static DEFINE_PXA3_CKEN(pxa3xx_pwm1, PWM1, 13000000, 0); |
| 247 | static DEFINE_PXA3_CKEN(pxa3xx_mmc1, MMC1, 19500000, 0); |
| 248 | static DEFINE_PXA3_CKEN(pxa3xx_mmc2, MMC2, 19500000, 0); |
| 249 | |
| 250 | static struct clk_lookup pxa3xx_clkregs[] = { |
| 251 | INIT_CLKREG(&clk_pxa3xx_pout, NULL, "CLK_POUT"), |
Mike Rapoport | 9ba63c4 | 2008-08-17 06:23:05 +0100 | [diff] [blame] | 252 | /* Power I2C clock is always on */ |
Daniel Mack | 5c68b09 | 2009-06-22 21:01:58 +0200 | [diff] [blame] | 253 | INIT_CLKREG(&clk_dummy, "pxa3xx-pwri2c.1", NULL), |
Russell King | 8c3abc7 | 2008-11-08 20:25:21 +0000 | [diff] [blame] | 254 | INIT_CLKREG(&clk_pxa3xx_lcd, "pxa2xx-fb", NULL), |
| 255 | INIT_CLKREG(&clk_pxa3xx_camera, NULL, "CAMCLK"), |
| 256 | INIT_CLKREG(&clk_pxa3xx_ac97, NULL, "AC97CLK"), |
| 257 | INIT_CLKREG(&clk_pxa3xx_ffuart, "pxa2xx-uart.0", NULL), |
| 258 | INIT_CLKREG(&clk_pxa3xx_btuart, "pxa2xx-uart.1", NULL), |
| 259 | INIT_CLKREG(&clk_pxa3xx_stuart, "pxa2xx-uart.2", NULL), |
| 260 | INIT_CLKREG(&clk_pxa3xx_stuart, "pxa2xx-ir", "UARTCLK"), |
| 261 | INIT_CLKREG(&clk_pxa3xx_i2c, "pxa2xx-i2c.0", NULL), |
| 262 | INIT_CLKREG(&clk_pxa3xx_udc, "pxa27x-udc", NULL), |
| 263 | INIT_CLKREG(&clk_pxa3xx_usbh, "pxa27x-ohci", NULL), |
| 264 | INIT_CLKREG(&clk_pxa3xx_keypad, "pxa27x-keypad", NULL), |
| 265 | INIT_CLKREG(&clk_pxa3xx_ssp1, "pxa27x-ssp.0", NULL), |
| 266 | INIT_CLKREG(&clk_pxa3xx_ssp2, "pxa27x-ssp.1", NULL), |
| 267 | INIT_CLKREG(&clk_pxa3xx_ssp3, "pxa27x-ssp.2", NULL), |
| 268 | INIT_CLKREG(&clk_pxa3xx_ssp4, "pxa27x-ssp.3", NULL), |
| 269 | INIT_CLKREG(&clk_pxa3xx_pwm0, "pxa27x-pwm.0", NULL), |
| 270 | INIT_CLKREG(&clk_pxa3xx_pwm1, "pxa27x-pwm.1", NULL), |
| 271 | INIT_CLKREG(&clk_pxa3xx_mmc1, "pxa2xx-mci.0", NULL), |
| 272 | INIT_CLKREG(&clk_pxa3xx_mmc2, "pxa2xx-mci.1", NULL), |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 273 | }; |
| 274 | |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 275 | #ifdef CONFIG_PM |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 276 | |
| 277 | #define ISRAM_START 0x5c000000 |
| 278 | #define ISRAM_SIZE SZ_256K |
| 279 | |
| 280 | static void __iomem *sram; |
| 281 | static unsigned long wakeup_src; |
| 282 | |
eric miao | c4d1fb6 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 283 | #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x |
| 284 | #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x] |
| 285 | |
Robert Jarzmik | 649de51 | 2008-05-02 21:17:06 +0100 | [diff] [blame] | 286 | enum { SLEEP_SAVE_CKENA, |
eric miao | c4d1fb6 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 287 | SLEEP_SAVE_CKENB, |
| 288 | SLEEP_SAVE_ACCR, |
| 289 | |
Robert Jarzmik | 649de51 | 2008-05-02 21:17:06 +0100 | [diff] [blame] | 290 | SLEEP_SAVE_COUNT, |
eric miao | c4d1fb6 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 291 | }; |
| 292 | |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 293 | static void pxa3xx_cpu_pm_save(unsigned long *sleep_save) |
| 294 | { |
eric miao | c4d1fb6 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 295 | SAVE(CKENA); |
| 296 | SAVE(CKENB); |
| 297 | SAVE(ACCR); |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | static void pxa3xx_cpu_pm_restore(unsigned long *sleep_save) |
| 301 | { |
eric miao | c4d1fb6 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 302 | RESTORE(ACCR); |
| 303 | RESTORE(CKENA); |
| 304 | RESTORE(CKENB); |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | /* |
| 308 | * Enter a standby mode (S0D1C2 or S0D2C2). Upon wakeup, the dynamic |
| 309 | * memory controller has to be reinitialised, so we place some code |
| 310 | * in the SRAM to perform this function. |
| 311 | * |
| 312 | * We disable FIQs across the standby - otherwise, we might receive a |
| 313 | * FIQ while the SDRAM is unavailable. |
| 314 | */ |
| 315 | static void pxa3xx_cpu_standby(unsigned int pwrmode) |
| 316 | { |
| 317 | extern const char pm_enter_standby_start[], pm_enter_standby_end[]; |
| 318 | void (*fn)(unsigned int) = (void __force *)(sram + 0x8000); |
| 319 | |
| 320 | memcpy_toio(sram + 0x8000, pm_enter_standby_start, |
| 321 | pm_enter_standby_end - pm_enter_standby_start); |
| 322 | |
| 323 | AD2D0SR = ~0; |
| 324 | AD2D1SR = ~0; |
| 325 | AD2D0ER = wakeup_src; |
| 326 | AD2D1ER = 0; |
| 327 | ASCR = ASCR; |
| 328 | ARSR = ARSR; |
| 329 | |
| 330 | local_fiq_disable(); |
| 331 | fn(pwrmode); |
| 332 | local_fiq_enable(); |
| 333 | |
| 334 | AD2D0ER = 0; |
| 335 | AD2D1ER = 0; |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 336 | } |
| 337 | |
eric miao | c4d1fb6 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 338 | /* |
| 339 | * NOTE: currently, the OBM (OEM Boot Module) binary comes along with |
| 340 | * PXA3xx development kits assumes that the resuming process continues |
| 341 | * with the address stored within the first 4 bytes of SDRAM. The PSPR |
| 342 | * register is used privately by BootROM and OBM, and _must_ be set to |
| 343 | * 0x5c014000 for the moment. |
| 344 | */ |
| 345 | static void pxa3xx_cpu_pm_suspend(void) |
| 346 | { |
| 347 | volatile unsigned long *p = (volatile void *)0xc0000000; |
| 348 | unsigned long saved_data = *p; |
| 349 | |
| 350 | extern void pxa3xx_cpu_suspend(void); |
| 351 | extern void pxa3xx_cpu_resume(void); |
| 352 | |
| 353 | /* resuming from D2 requires the HSIO2/BOOT/TPM clocks enabled */ |
| 354 | CKENA |= (1 << CKEN_BOOT) | (1 << CKEN_TPM); |
| 355 | CKENB |= 1 << (CKEN_HSIO2 & 0x1f); |
| 356 | |
| 357 | /* clear and setup wakeup source */ |
| 358 | AD3SR = ~0; |
| 359 | AD3ER = wakeup_src; |
| 360 | ASCR = ASCR; |
| 361 | ARSR = ARSR; |
| 362 | |
| 363 | PCFR |= (1u << 13); /* L1_DIS */ |
| 364 | PCFR &= ~((1u << 12) | (1u << 1)); /* L0_EN | SL_ROD */ |
| 365 | |
| 366 | PSPR = 0x5c014000; |
| 367 | |
| 368 | /* overwrite with the resume address */ |
| 369 | *p = virt_to_phys(pxa3xx_cpu_resume); |
| 370 | |
| 371 | pxa3xx_cpu_suspend(); |
| 372 | |
| 373 | *p = saved_data; |
| 374 | |
| 375 | AD3ER = 0; |
| 376 | } |
| 377 | |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 378 | static void pxa3xx_cpu_pm_enter(suspend_state_t state) |
| 379 | { |
| 380 | /* |
| 381 | * Don't sleep if no wakeup sources are defined |
| 382 | */ |
Mark Brown | b86a5da | 2008-04-09 11:32:21 +0100 | [diff] [blame] | 383 | if (wakeup_src == 0) { |
| 384 | printk(KERN_ERR "Not suspending: no wakeup sources\n"); |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 385 | return; |
Mark Brown | b86a5da | 2008-04-09 11:32:21 +0100 | [diff] [blame] | 386 | } |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 387 | |
| 388 | switch (state) { |
| 389 | case PM_SUSPEND_STANDBY: |
| 390 | pxa3xx_cpu_standby(PXA3xx_PM_S0D2C2); |
| 391 | break; |
| 392 | |
| 393 | case PM_SUSPEND_MEM: |
eric miao | c4d1fb6 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 394 | pxa3xx_cpu_pm_suspend(); |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 395 | break; |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | static int pxa3xx_cpu_pm_valid(suspend_state_t state) |
| 400 | { |
| 401 | return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY; |
| 402 | } |
| 403 | |
| 404 | static struct pxa_cpu_pm_fns pxa3xx_cpu_pm_fns = { |
Robert Jarzmik | 649de51 | 2008-05-02 21:17:06 +0100 | [diff] [blame] | 405 | .save_count = SLEEP_SAVE_COUNT, |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 406 | .save = pxa3xx_cpu_pm_save, |
| 407 | .restore = pxa3xx_cpu_pm_restore, |
| 408 | .valid = pxa3xx_cpu_pm_valid, |
| 409 | .enter = pxa3xx_cpu_pm_enter, |
| 410 | }; |
| 411 | |
| 412 | static void __init pxa3xx_init_pm(void) |
| 413 | { |
| 414 | sram = ioremap(ISRAM_START, ISRAM_SIZE); |
| 415 | if (!sram) { |
| 416 | printk(KERN_ERR "Unable to map ISRAM: disabling standby/suspend\n"); |
| 417 | return; |
| 418 | } |
| 419 | |
| 420 | /* |
| 421 | * Since we copy wakeup code into the SRAM, we need to ensure |
| 422 | * that it is preserved over the low power modes. Note: bit 8 |
| 423 | * is undocumented in the developer manual, but must be set. |
| 424 | */ |
| 425 | AD1R |= ADXR_L2 | ADXR_R0; |
| 426 | AD2R |= ADXR_L2 | ADXR_R0; |
| 427 | AD3R |= ADXR_L2 | ADXR_R0; |
| 428 | |
| 429 | /* |
| 430 | * Clear the resume enable registers. |
| 431 | */ |
| 432 | AD1D0ER = 0; |
| 433 | AD2D0ER = 0; |
| 434 | AD2D1ER = 0; |
| 435 | AD3ER = 0; |
| 436 | |
| 437 | pxa_cpu_pm_fns = &pxa3xx_cpu_pm_fns; |
| 438 | } |
| 439 | |
| 440 | static int pxa3xx_set_wake(unsigned int irq, unsigned int on) |
| 441 | { |
| 442 | unsigned long flags, mask = 0; |
| 443 | |
| 444 | switch (irq) { |
| 445 | case IRQ_SSP3: |
| 446 | mask = ADXER_MFP_WSSP3; |
| 447 | break; |
| 448 | case IRQ_MSL: |
| 449 | mask = ADXER_WMSL0; |
| 450 | break; |
| 451 | case IRQ_USBH2: |
| 452 | case IRQ_USBH1: |
| 453 | mask = ADXER_WUSBH; |
| 454 | break; |
| 455 | case IRQ_KEYPAD: |
| 456 | mask = ADXER_WKP; |
| 457 | break; |
| 458 | case IRQ_AC97: |
| 459 | mask = ADXER_MFP_WAC97; |
| 460 | break; |
| 461 | case IRQ_USIM: |
| 462 | mask = ADXER_WUSIM0; |
| 463 | break; |
| 464 | case IRQ_SSP2: |
| 465 | mask = ADXER_MFP_WSSP2; |
| 466 | break; |
| 467 | case IRQ_I2C: |
| 468 | mask = ADXER_MFP_WI2C; |
| 469 | break; |
| 470 | case IRQ_STUART: |
| 471 | mask = ADXER_MFP_WUART3; |
| 472 | break; |
| 473 | case IRQ_BTUART: |
| 474 | mask = ADXER_MFP_WUART2; |
| 475 | break; |
| 476 | case IRQ_FFUART: |
| 477 | mask = ADXER_MFP_WUART1; |
| 478 | break; |
| 479 | case IRQ_MMC: |
| 480 | mask = ADXER_MFP_WMMC1; |
| 481 | break; |
| 482 | case IRQ_SSP: |
| 483 | mask = ADXER_MFP_WSSP1; |
| 484 | break; |
| 485 | case IRQ_RTCAlrm: |
| 486 | mask = ADXER_WRTC; |
| 487 | break; |
| 488 | case IRQ_SSP4: |
| 489 | mask = ADXER_MFP_WSSP4; |
| 490 | break; |
| 491 | case IRQ_TSI: |
| 492 | mask = ADXER_WTSI; |
| 493 | break; |
| 494 | case IRQ_USIM2: |
| 495 | mask = ADXER_WUSIM1; |
| 496 | break; |
| 497 | case IRQ_MMC2: |
| 498 | mask = ADXER_MFP_WMMC2; |
| 499 | break; |
| 500 | case IRQ_NAND: |
| 501 | mask = ADXER_MFP_WFLASH; |
| 502 | break; |
| 503 | case IRQ_USB2: |
| 504 | mask = ADXER_WUSB2; |
| 505 | break; |
| 506 | case IRQ_WAKEUP0: |
| 507 | mask = ADXER_WEXTWAKE0; |
| 508 | break; |
| 509 | case IRQ_WAKEUP1: |
| 510 | mask = ADXER_WEXTWAKE1; |
| 511 | break; |
| 512 | case IRQ_MMC3: |
| 513 | mask = ADXER_MFP_GEN12; |
| 514 | break; |
Mark Brown | e121770 | 2008-04-23 10:28:18 +0100 | [diff] [blame] | 515 | default: |
| 516 | return -EINVAL; |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 517 | } |
| 518 | |
| 519 | local_irq_save(flags); |
| 520 | if (on) |
| 521 | wakeup_src |= mask; |
| 522 | else |
| 523 | wakeup_src &= ~mask; |
| 524 | local_irq_restore(flags); |
| 525 | |
| 526 | return 0; |
| 527 | } |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 528 | #else |
| 529 | static inline void pxa3xx_init_pm(void) {} |
eric miao | b9e25ac | 2008-03-04 14:19:58 +0800 | [diff] [blame] | 530 | #define pxa3xx_set_wake NULL |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 531 | #endif |
| 532 | |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 533 | void __init pxa3xx_init_irq(void) |
| 534 | { |
| 535 | /* enable CP6 access */ |
| 536 | u32 value; |
| 537 | __asm__ __volatile__("mrc p15, 0, %0, c15, c1, 0\n": "=r"(value)); |
| 538 | value |= (1 << 6); |
| 539 | __asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value)); |
| 540 | |
eric miao | b9e25ac | 2008-03-04 14:19:58 +0800 | [diff] [blame] | 541 | pxa_init_irq(56, pxa3xx_set_wake); |
Eric Miao | a58fbcd | 2009-01-06 17:37:37 +0800 | [diff] [blame] | 542 | pxa_init_gpio(IRQ_GPIO_2_x, 2, 127, NULL); |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 543 | } |
| 544 | |
| 545 | /* |
| 546 | * device registration specific to PXA3xx. |
| 547 | */ |
| 548 | |
Mike Rapoport | 9ba63c4 | 2008-08-17 06:23:05 +0100 | [diff] [blame] | 549 | void __init pxa3xx_set_i2c_power_info(struct i2c_pxa_platform_data *info) |
| 550 | { |
Eric Miao | 1475822 | 2008-11-28 15:24:12 +0800 | [diff] [blame] | 551 | pxa_register_device(&pxa3xx_device_i2c_power, info); |
Mike Rapoport | 9ba63c4 | 2008-08-17 06:23:05 +0100 | [diff] [blame] | 552 | } |
| 553 | |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 554 | static struct platform_device *devices[] __initdata = { |
Robert Jarzmik | 94c35a6 | 2009-04-21 19:19:36 +0200 | [diff] [blame] | 555 | &pxa27x_device_udc, |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 556 | &pxa_device_ffuart, |
| 557 | &pxa_device_btuart, |
| 558 | &pxa_device_stuart, |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 559 | &pxa_device_i2s, |
Robert Jarzmik | 7249314 | 2008-11-13 23:50:56 +0100 | [diff] [blame] | 560 | &sa1100_device_rtc, |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 561 | &pxa_device_rtc, |
eric miao | d8e0db1 | 2007-12-10 17:54:36 +0800 | [diff] [blame] | 562 | &pxa27x_device_ssp1, |
| 563 | &pxa27x_device_ssp2, |
| 564 | &pxa27x_device_ssp3, |
| 565 | &pxa3xx_device_ssp4, |
eric miao | 75540c1 | 2008-04-13 21:44:04 +0100 | [diff] [blame] | 566 | &pxa27x_device_pwm0, |
| 567 | &pxa27x_device_pwm1, |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 568 | }; |
| 569 | |
eric miao | c0165504 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 570 | static struct sys_device pxa3xx_sysdev[] = { |
| 571 | { |
eric miao | c0165504 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 572 | .cls = &pxa_irq_sysclass, |
eric miao | 16dfdbf | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 573 | }, { |
eric miao | 4be35e2 | 2008-02-04 10:07:09 +0800 | [diff] [blame] | 574 | .cls = &pxa3xx_mfp_sysclass, |
| 575 | }, { |
eric miao | 16dfdbf | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 576 | .cls = &pxa_gpio_sysclass, |
eric miao | c0165504 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 577 | }, |
| 578 | }; |
| 579 | |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 580 | static int __init pxa3xx_init(void) |
| 581 | { |
eric miao | c0165504 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 582 | int i, ret = 0; |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 583 | |
| 584 | if (cpu_is_pxa3xx()) { |
Eric Miao | 04fef22 | 2008-07-29 14:26:00 +0800 | [diff] [blame] | 585 | |
| 586 | reset_status = ARSR; |
| 587 | |
Dmitry Krivoschekov | 86260f9 | 2008-02-08 15:02:03 +0100 | [diff] [blame] | 588 | /* |
| 589 | * clear RDH bit every time after reset |
| 590 | * |
| 591 | * Note: the last 3 bits DxS are write-1-to-clear so carefully |
| 592 | * preserve them here in case they will be referenced later |
| 593 | */ |
| 594 | ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S); |
| 595 | |
Russell King | 8c3abc7 | 2008-11-08 20:25:21 +0000 | [diff] [blame] | 596 | clks_register(pxa3xx_clkregs, ARRAY_SIZE(pxa3xx_clkregs)); |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 597 | |
Eric Miao | fef1f99 | 2009-01-02 16:26:33 +0800 | [diff] [blame] | 598 | if ((ret = pxa_init_dma(IRQ_DMA, 32))) |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 599 | return ret; |
| 600 | |
Russell King | 7b5dea1 | 2008-01-07 22:18:30 +0000 | [diff] [blame] | 601 | pxa3xx_init_pm(); |
| 602 | |
eric miao | c0165504 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 603 | for (i = 0; i < ARRAY_SIZE(pxa3xx_sysdev); i++) { |
| 604 | ret = sysdev_register(&pxa3xx_sysdev[i]); |
| 605 | if (ret) |
| 606 | pr_err("failed to register sysdev[%d]\n", i); |
| 607 | } |
| 608 | |
| 609 | ret = platform_add_devices(devices, ARRAY_SIZE(devices)); |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 610 | } |
eric miao | c0165504 | 2008-01-28 23:00:02 +0000 | [diff] [blame] | 611 | |
| 612 | return ret; |
eric miao | 2c8086a | 2007-09-11 19:13:17 -0700 | [diff] [blame] | 613 | } |
| 614 | |
Russell King | 1c104e0 | 2008-04-19 10:59:24 +0100 | [diff] [blame] | 615 | postcore_initcall(pxa3xx_init); |