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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-pxa/pxa25x.c | |
3 | * | |
4 | * Author: Nicolas Pitre | |
5 | * Created: Jun 15, 2001 | |
6 | * Copyright: MontaVista Software Inc. | |
7 | * | |
8 | * Code specific to PXA21x/25x/26x variants. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License version 2 as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * Since this file should be linked before any other machine specific file, | |
15 | * the __initcall() here will be executed first. This serves as default | |
16 | * initialization stuff for PXA machines which can be overridden later if | |
17 | * need be. | |
18 | */ | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/init.h> | |
34f3231f | 22 | #include <linux/platform_device.h> |
95d9ffbe | 23 | #include <linux/suspend.h> |
c0165504 | 24 | #include <linux/sysdev.h> |
1da177e4 | 25 | |
a09e64fb RK |
26 | #include <mach/hardware.h> |
27 | #include <mach/irqs.h> | |
a58fbcd8 | 28 | #include <mach/gpio.h> |
51c62982 | 29 | #include <mach/pxa25x.h> |
afd2fc02 | 30 | #include <mach/reset.h> |
a09e64fb RK |
31 | #include <mach/pm.h> |
32 | #include <mach/dma.h> | |
1da177e4 LT |
33 | |
34 | #include "generic.h" | |
46c41e62 | 35 | #include "devices.h" |
a6dba20c | 36 | #include "clock.h" |
1da177e4 LT |
37 | |
38 | /* | |
39 | * Various clock factors driven by the CCCR register. | |
40 | */ | |
41 | ||
42 | /* Crystal Frequency to Memory Frequency Multiplier (L) */ | |
43 | static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, }; | |
44 | ||
45 | /* Memory Frequency to Run Mode Frequency Multiplier (M) */ | |
46 | static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 }; | |
47 | ||
48 | /* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */ | |
49 | /* Note: we store the value N * 2 here. */ | |
50 | static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 }; | |
51 | ||
52 | /* Crystal clock */ | |
53 | #define BASE_CLK 3686400 | |
54 | ||
55 | /* | |
56 | * Get the clock frequency as reflected by CCCR and the turbo flag. | |
57 | * We assume these values have been applied via a fcs. | |
58 | * If info is not 0 we also display the current settings. | |
59 | */ | |
15a40333 | 60 | unsigned int pxa25x_get_clk_frequency_khz(int info) |
1da177e4 LT |
61 | { |
62 | unsigned long cccr, turbo; | |
63 | unsigned int l, L, m, M, n2, N; | |
64 | ||
65 | cccr = CCCR; | |
66 | asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) ); | |
67 | ||
68 | l = L_clk_mult[(cccr >> 0) & 0x1f]; | |
69 | m = M_clk_mult[(cccr >> 5) & 0x03]; | |
70 | n2 = N2_clk_mult[(cccr >> 7) & 0x07]; | |
71 | ||
72 | L = l * BASE_CLK; | |
73 | M = m * L; | |
74 | N = n2 * M / 2; | |
75 | ||
76 | if(info) | |
77 | { | |
78 | L += 5000; | |
79 | printk( KERN_INFO "Memory clock: %d.%02dMHz (*%d)\n", | |
80 | L / 1000000, (L % 1000000) / 10000, l ); | |
81 | M += 5000; | |
82 | printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n", | |
83 | M / 1000000, (M % 1000000) / 10000, m ); | |
84 | N += 5000; | |
85 | printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n", | |
86 | N / 1000000, (N % 1000000) / 10000, n2 / 2, (n2 % 2) * 5, | |
87 | (turbo & 1) ? "" : "in" ); | |
88 | } | |
89 | ||
90 | return (turbo & 1) ? (N/1000) : (M/1000); | |
91 | } | |
92 | ||
1da177e4 LT |
93 | /* |
94 | * Return the current memory clock frequency in units of 10kHz | |
95 | */ | |
15a40333 | 96 | unsigned int pxa25x_get_memclk_frequency_10khz(void) |
1da177e4 LT |
97 | { |
98 | return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000; | |
99 | } | |
100 | ||
a6dba20c RK |
101 | static unsigned long clk_pxa25x_lcd_getrate(struct clk *clk) |
102 | { | |
103 | return pxa25x_get_memclk_frequency_10khz() * 10000; | |
104 | } | |
105 | ||
106 | static const struct clkops clk_pxa25x_lcd_ops = { | |
107 | .enable = clk_cken_enable, | |
108 | .disable = clk_cken_disable, | |
109 | .getrate = clk_pxa25x_lcd_getrate, | |
110 | }; | |
111 | ||
ed847782 IM |
112 | static unsigned long gpio12_config_32k[] = { |
113 | GPIO12_32KHz, | |
114 | }; | |
115 | ||
116 | static unsigned long gpio12_config_gpio[] = { | |
117 | GPIO12_GPIO, | |
118 | }; | |
119 | ||
120 | static void clk_gpio12_enable(struct clk *clk) | |
121 | { | |
122 | pxa2xx_mfp_config(gpio12_config_32k, 1); | |
123 | } | |
124 | ||
125 | static void clk_gpio12_disable(struct clk *clk) | |
126 | { | |
127 | pxa2xx_mfp_config(gpio12_config_gpio, 1); | |
128 | } | |
129 | ||
130 | static const struct clkops clk_pxa25x_gpio12_ops = { | |
131 | .enable = clk_gpio12_enable, | |
132 | .disable = clk_gpio12_disable, | |
133 | }; | |
134 | ||
13f75582 IM |
135 | static unsigned long gpio11_config_3m6[] = { |
136 | GPIO11_3_6MHz, | |
137 | }; | |
138 | ||
139 | static unsigned long gpio11_config_gpio[] = { | |
140 | GPIO11_GPIO, | |
141 | }; | |
142 | ||
143 | static void clk_gpio11_enable(struct clk *clk) | |
144 | { | |
145 | pxa2xx_mfp_config(gpio11_config_3m6, 1); | |
146 | } | |
147 | ||
148 | static void clk_gpio11_disable(struct clk *clk) | |
149 | { | |
150 | pxa2xx_mfp_config(gpio11_config_gpio, 1); | |
151 | } | |
152 | ||
153 | static const struct clkops clk_pxa25x_gpio11_ops = { | |
154 | .enable = clk_gpio11_enable, | |
155 | .disable = clk_gpio11_disable, | |
156 | }; | |
157 | ||
a6dba20c RK |
158 | /* |
159 | * 3.6864MHz -> OST, GPIO, SSP, PWM, PLLs (95.842MHz, 147.456MHz) | |
160 | * 95.842MHz -> MMC 19.169MHz, I2C 31.949MHz, FICP 47.923MHz, USB 47.923MHz | |
161 | * 147.456MHz -> UART 14.7456MHz, AC97 12.288MHz, I2S 5.672MHz (allegedly) | |
162 | */ | |
8c3abc7d RK |
163 | static DEFINE_CKEN(pxa25x_hwuart, HWUART, 14745600, 1); |
164 | ||
165 | static struct clk_lookup pxa25x_hwuart_clkreg = | |
166 | INIT_CLKREG(&clk_pxa25x_hwuart, "pxa2xx-uart.3", NULL); | |
e01dbdb4 | 167 | |
bdb08cb2 | 168 | /* |
c1ed406c | 169 | * PXA 2xx clock declarations. |
bdb08cb2 | 170 | */ |
8c3abc7d RK |
171 | static DEFINE_CK(pxa25x_lcd, LCD, &clk_pxa25x_lcd_ops); |
172 | static DEFINE_CKEN(pxa25x_ffuart, FFUART, 14745600, 1); | |
173 | static DEFINE_CKEN(pxa25x_btuart, BTUART, 14745600, 1); | |
174 | static DEFINE_CKEN(pxa25x_stuart, STUART, 14745600, 1); | |
175 | static DEFINE_CKEN(pxa25x_usb, USB, 47923000, 5); | |
176 | static DEFINE_CLK(pxa25x_gpio11, &clk_pxa25x_gpio11_ops, 3686400, 0); | |
177 | static DEFINE_CLK(pxa25x_gpio12, &clk_pxa25x_gpio12_ops, 32768, 0); | |
178 | static DEFINE_CKEN(pxa25x_mmc, MMC, 19169000, 0); | |
179 | static DEFINE_CKEN(pxa25x_i2c, I2C, 31949000, 0); | |
180 | static DEFINE_CKEN(pxa25x_ssp, SSP, 3686400, 0); | |
181 | static DEFINE_CKEN(pxa25x_nssp, NSSP, 3686400, 0); | |
182 | static DEFINE_CKEN(pxa25x_assp, ASSP, 3686400, 0); | |
183 | static DEFINE_CKEN(pxa25x_pwm0, PWM0, 3686400, 0); | |
184 | static DEFINE_CKEN(pxa25x_pwm1, PWM1, 3686400, 0); | |
185 | static DEFINE_CKEN(pxa25x_ac97, AC97, 24576000, 0); | |
186 | static DEFINE_CKEN(pxa25x_i2s, I2S, 14745600, 0); | |
187 | static DEFINE_CKEN(pxa25x_ficp, FICP, 47923000, 0); | |
188 | ||
189 | static struct clk_lookup pxa25x_clkregs[] = { | |
190 | INIT_CLKREG(&clk_pxa25x_lcd, "pxa2xx-fb", NULL), | |
191 | INIT_CLKREG(&clk_pxa25x_ffuart, "pxa2xx-uart.0", NULL), | |
192 | INIT_CLKREG(&clk_pxa25x_btuart, "pxa2xx-uart.1", NULL), | |
193 | INIT_CLKREG(&clk_pxa25x_stuart, "pxa2xx-uart.2", NULL), | |
194 | INIT_CLKREG(&clk_pxa25x_usb, "pxa25x-udc", NULL), | |
195 | INIT_CLKREG(&clk_pxa25x_mmc, "pxa2xx-mci.0", NULL), | |
196 | INIT_CLKREG(&clk_pxa25x_i2c, "pxa2xx-i2c.0", NULL), | |
197 | INIT_CLKREG(&clk_pxa25x_ssp, "pxa25x-ssp.0", NULL), | |
198 | INIT_CLKREG(&clk_pxa25x_nssp, "pxa25x-nssp.1", NULL), | |
199 | INIT_CLKREG(&clk_pxa25x_assp, "pxa25x-nssp.2", NULL), | |
200 | INIT_CLKREG(&clk_pxa25x_pwm0, "pxa25x-pwm.0", NULL), | |
201 | INIT_CLKREG(&clk_pxa25x_pwm1, "pxa25x-pwm.1", NULL), | |
202 | INIT_CLKREG(&clk_pxa25x_i2s, "pxa2xx-i2s", NULL), | |
203 | INIT_CLKREG(&clk_pxa25x_stuart, "pxa2xx-ir", "UARTCLK"), | |
204 | INIT_CLKREG(&clk_pxa25x_ficp, "pxa2xx-ir", "FICPCLK"), | |
205 | INIT_CLKREG(&clk_pxa25x_ac97, NULL, "AC97CLK"), | |
206 | INIT_CLKREG(&clk_pxa25x_gpio11, NULL, "GPIO11_CLK"), | |
207 | INIT_CLKREG(&clk_pxa25x_gpio12, NULL, "GPIO12_CLK"), | |
a6dba20c RK |
208 | }; |
209 | ||
a8fa3f0c | 210 | #ifdef CONFIG_PM |
8775420d | 211 | |
711be5cc EM |
212 | #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x |
213 | #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x] | |
214 | ||
711be5cc EM |
215 | /* |
216 | * List of global PXA peripheral registers to preserve. | |
217 | * More ones like CP and general purpose register values are preserved | |
218 | * with the stack pointer in sleep.S. | |
219 | */ | |
5a3d9651 | 220 | enum { |
711be5cc | 221 | SLEEP_SAVE_PSTR, |
711be5cc | 222 | SLEEP_SAVE_CKEN, |
649de51b | 223 | SLEEP_SAVE_COUNT |
711be5cc EM |
224 | }; |
225 | ||
226 | ||
227 | static void pxa25x_cpu_pm_save(unsigned long *sleep_save) | |
228 | { | |
711be5cc EM |
229 | SAVE(CKEN); |
230 | SAVE(PSTR); | |
231 | } | |
232 | ||
233 | static void pxa25x_cpu_pm_restore(unsigned long *sleep_save) | |
234 | { | |
711be5cc | 235 | RESTORE(CKEN); |
711be5cc EM |
236 | RESTORE(PSTR); |
237 | } | |
238 | ||
239 | static void pxa25x_cpu_pm_enter(suspend_state_t state) | |
8775420d | 240 | { |
dc38e2ad RK |
241 | /* Clear reset status */ |
242 | RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR; | |
243 | ||
8775420d TP |
244 | switch (state) { |
245 | case PM_SUSPEND_MEM: | |
b750a093 | 246 | pxa25x_cpu_suspend(PWRMODE_SLEEP); |
8775420d TP |
247 | break; |
248 | } | |
249 | } | |
a8fa3f0c | 250 | |
4104980a RK |
251 | static int pxa25x_cpu_pm_prepare(void) |
252 | { | |
253 | /* set resume return address */ | |
254 | PSPR = virt_to_phys(pxa_cpu_resume); | |
255 | return 0; | |
256 | } | |
257 | ||
258 | static void pxa25x_cpu_pm_finish(void) | |
259 | { | |
260 | /* ensure not to come back here if it wasn't intended */ | |
261 | PSPR = 0; | |
262 | } | |
263 | ||
711be5cc | 264 | static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = { |
649de51b | 265 | .save_count = SLEEP_SAVE_COUNT, |
26398a70 | 266 | .valid = suspend_valid_only_mem, |
711be5cc EM |
267 | .save = pxa25x_cpu_pm_save, |
268 | .restore = pxa25x_cpu_pm_restore, | |
269 | .enter = pxa25x_cpu_pm_enter, | |
4104980a RK |
270 | .prepare = pxa25x_cpu_pm_prepare, |
271 | .finish = pxa25x_cpu_pm_finish, | |
e176bb05 | 272 | }; |
711be5cc EM |
273 | |
274 | static void __init pxa25x_init_pm(void) | |
275 | { | |
276 | pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns; | |
277 | } | |
f79299ca | 278 | #else |
279 | static inline void pxa25x_init_pm(void) {} | |
a8fa3f0c | 280 | #endif |
e176bb05 | 281 | |
c95530c7 | 282 | /* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm |
283 | */ | |
284 | ||
285 | static int pxa25x_set_wake(unsigned int irq, unsigned int on) | |
286 | { | |
287 | int gpio = IRQ_TO_GPIO(irq); | |
c0a596d6 | 288 | uint32_t mask = 0; |
289 | ||
290 | if (gpio >= 0 && gpio < 85) | |
291 | return gpio_set_wake(gpio, on); | |
c95530c7 | 292 | |
293 | if (irq == IRQ_RTCAlrm) { | |
294 | mask = PWER_RTC; | |
295 | goto set_pwer; | |
296 | } | |
297 | ||
298 | return -EINVAL; | |
299 | ||
300 | set_pwer: | |
301 | if (on) | |
302 | PWER |= mask; | |
303 | else | |
304 | PWER &=~mask; | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
cd49104d EM |
309 | void __init pxa25x_init_irq(void) |
310 | { | |
b9e25ace | 311 | pxa_init_irq(32, pxa25x_set_wake); |
a58fbcd8 | 312 | pxa_init_gpio(IRQ_GPIO_2_x, 2, 84, pxa25x_set_wake); |
cd49104d EM |
313 | } |
314 | ||
067455aa EM |
315 | #ifdef CONFIG_CPU_PXA26x |
316 | void __init pxa26x_init_irq(void) | |
317 | { | |
318 | pxa_init_irq(32, pxa25x_set_wake); | |
a58fbcd8 | 319 | pxa_init_gpio(IRQ_GPIO_2_x, 2, 89, pxa25x_set_wake); |
067455aa EM |
320 | } |
321 | #endif | |
322 | ||
34f3231f | 323 | static struct platform_device *pxa25x_devices[] __initdata = { |
7a857620 | 324 | &pxa25x_device_udc, |
09a5358d | 325 | &pxa_device_pmu, |
e09d02e1 | 326 | &pxa_device_i2s, |
72493146 | 327 | &sa1100_device_rtc, |
d8e0db11 | 328 | &pxa25x_device_ssp, |
329 | &pxa25x_device_nssp, | |
330 | &pxa25x_device_assp, | |
75540c1a | 331 | &pxa25x_device_pwm0, |
332 | &pxa25x_device_pwm1, | |
34f3231f RK |
333 | }; |
334 | ||
c0165504 | 335 | static struct sys_device pxa25x_sysdev[] = { |
336 | { | |
337 | .cls = &pxa_irq_sysclass, | |
5a3d9651 EM |
338 | }, { |
339 | .cls = &pxa2xx_mfp_sysclass, | |
16dfdbf0 | 340 | }, { |
341 | .cls = &pxa_gpio_sysclass, | |
c0165504 | 342 | }, |
343 | }; | |
344 | ||
e176bb05 RK |
345 | static int __init pxa25x_init(void) |
346 | { | |
c0165504 | 347 | int i, ret = 0; |
f53f066c | 348 | |
0ffcbfd5 | 349 | if (cpu_is_pxa25x()) { |
04fef228 EM |
350 | |
351 | reset_status = RCSR; | |
352 | ||
0a0300dc | 353 | clkdev_add_table(pxa25x_clkregs, ARRAY_SIZE(pxa25x_clkregs)); |
a6dba20c | 354 | |
fef1f99a | 355 | if ((ret = pxa_init_dma(IRQ_DMA, 16))) |
f53f066c | 356 | return ret; |
f79299ca | 357 | |
711be5cc | 358 | pxa25x_init_pm(); |
f79299ca | 359 | |
c0165504 | 360 | for (i = 0; i < ARRAY_SIZE(pxa25x_sysdev); i++) { |
361 | ret = sysdev_register(&pxa25x_sysdev[i]); | |
362 | if (ret) | |
363 | pr_err("failed to register sysdev[%d]\n", i); | |
364 | } | |
365 | ||
34f3231f RK |
366 | ret = platform_add_devices(pxa25x_devices, |
367 | ARRAY_SIZE(pxa25x_devices)); | |
c0165504 | 368 | if (ret) |
369 | return ret; | |
e176bb05 | 370 | } |
c0165504 | 371 | |
2b12797c | 372 | /* Only add HWUART for PXA255/26x; PXA210/250 do not have it. */ |
cc155c6f | 373 | if (cpu_is_pxa255()) |
0a0300dc | 374 | clkdev_add(&pxa25x_hwuart_clkreg); |
34f3231f RK |
375 | |
376 | return ret; | |
e176bb05 RK |
377 | } |
378 | ||
1c104e0e | 379 | postcore_initcall(pxa25x_init); |