[ARM] pxa: use new pin configuration mechanism for lubbock
[deliverable/linux.git] / arch / arm / mach-pxa / pxa25x.c
CommitLineData
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
LT
25
26#include <asm/hardware.h>
cd49104d 27#include <asm/arch/irqs.h>
1da177e4 28#include <asm/arch/pxa-regs.h>
e176bb05 29#include <asm/arch/pm.h>
f53f066c 30#include <asm/arch/dma.h>
1da177e4
LT
31
32#include "generic.h"
46c41e62 33#include "devices.h"
a6dba20c 34#include "clock.h"
1da177e4
LT
35
36/*
37 * Various clock factors driven by the CCCR register.
38 */
39
40/* Crystal Frequency to Memory Frequency Multiplier (L) */
41static unsigned char L_clk_mult[32] = { 0, 27, 32, 36, 40, 45, 0, };
42
43/* Memory Frequency to Run Mode Frequency Multiplier (M) */
44static unsigned char M_clk_mult[4] = { 0, 1, 2, 4 };
45
46/* Run Mode Frequency to Turbo Mode Frequency Multiplier (N) */
47/* Note: we store the value N * 2 here. */
48static unsigned char N2_clk_mult[8] = { 0, 0, 2, 3, 4, 0, 6, 0 };
49
50/* Crystal clock */
51#define BASE_CLK 3686400
52
53/*
54 * Get the clock frequency as reflected by CCCR and the turbo flag.
55 * We assume these values have been applied via a fcs.
56 * If info is not 0 we also display the current settings.
57 */
15a40333 58unsigned int pxa25x_get_clk_frequency_khz(int info)
1da177e4
LT
59{
60 unsigned long cccr, turbo;
61 unsigned int l, L, m, M, n2, N;
62
63 cccr = CCCR;
64 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (turbo) );
65
66 l = L_clk_mult[(cccr >> 0) & 0x1f];
67 m = M_clk_mult[(cccr >> 5) & 0x03];
68 n2 = N2_clk_mult[(cccr >> 7) & 0x07];
69
70 L = l * BASE_CLK;
71 M = m * L;
72 N = n2 * M / 2;
73
74 if(info)
75 {
76 L += 5000;
77 printk( KERN_INFO "Memory clock: %d.%02dMHz (*%d)\n",
78 L / 1000000, (L % 1000000) / 10000, l );
79 M += 5000;
80 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
81 M / 1000000, (M % 1000000) / 10000, m );
82 N += 5000;
83 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
84 N / 1000000, (N % 1000000) / 10000, n2 / 2, (n2 % 2) * 5,
85 (turbo & 1) ? "" : "in" );
86 }
87
88 return (turbo & 1) ? (N/1000) : (M/1000);
89}
90
1da177e4
LT
91/*
92 * Return the current memory clock frequency in units of 10kHz
93 */
15a40333 94unsigned int pxa25x_get_memclk_frequency_10khz(void)
1da177e4
LT
95{
96 return L_clk_mult[(CCCR >> 0) & 0x1f] * BASE_CLK / 10000;
97}
98
a6dba20c
RK
99static unsigned long clk_pxa25x_lcd_getrate(struct clk *clk)
100{
101 return pxa25x_get_memclk_frequency_10khz() * 10000;
102}
103
104static const struct clkops clk_pxa25x_lcd_ops = {
105 .enable = clk_cken_enable,
106 .disable = clk_cken_disable,
107 .getrate = clk_pxa25x_lcd_getrate,
108};
109
110/*
111 * 3.6864MHz -> OST, GPIO, SSP, PWM, PLLs (95.842MHz, 147.456MHz)
112 * 95.842MHz -> MMC 19.169MHz, I2C 31.949MHz, FICP 47.923MHz, USB 47.923MHz
113 * 147.456MHz -> UART 14.7456MHz, AC97 12.288MHz, I2S 5.672MHz (allegedly)
114 */
e01dbdb4
DB
115static struct clk pxa25x_hwuart_clk =
116 INIT_CKEN("UARTCLK", HWUART, 14745600, 1, &pxa_device_hwuart.dev)
117;
118
a6dba20c
RK
119static struct clk pxa25x_clks[] = {
120 INIT_CK("LCDCLK", LCD, &clk_pxa25x_lcd_ops, &pxa_device_fb.dev),
121 INIT_CKEN("UARTCLK", FFUART, 14745600, 1, &pxa_device_ffuart.dev),
122 INIT_CKEN("UARTCLK", BTUART, 14745600, 1, &pxa_device_btuart.dev),
435b6e94 123 INIT_CKEN("UARTCLK", STUART, 14745600, 1, NULL),
a6dba20c
RK
124 INIT_CKEN("UDCCLK", USB, 47923000, 5, &pxa_device_udc.dev),
125 INIT_CKEN("MMCCLK", MMC, 19169000, 0, &pxa_device_mci.dev),
126 INIT_CKEN("I2CCLK", I2C, 31949000, 0, &pxa_device_i2c.dev),
d8e0db11 127
128 INIT_CKEN("SSPCLK", SSP, 3686400, 0, &pxa25x_device_ssp.dev),
129 INIT_CKEN("SSPCLK", NSSP, 3686400, 0, &pxa25x_device_nssp.dev),
130 INIT_CKEN("SSPCLK", ASSP, 3686400, 0, &pxa25x_device_assp.dev),
131
27b98a67
MB
132 INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
133
a6dba20c
RK
134 /*
135 INIT_CKEN("PWMCLK", PWM0, 3686400, 0, NULL),
136 INIT_CKEN("PWMCLK", PWM0, 3686400, 0, NULL),
a6dba20c 137 INIT_CKEN("I2SCLK", I2S, 14745600, 0, NULL),
a6dba20c 138 */
435b6e94 139 INIT_CKEN("FICPCLK", FICP, 47923000, 0, NULL),
a6dba20c
RK
140};
141
a8fa3f0c 142#ifdef CONFIG_PM
8775420d 143
711be5cc
EM
144#define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
145#define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
146
711be5cc
EM
147/*
148 * List of global PXA peripheral registers to preserve.
149 * More ones like CP and general purpose register values are preserved
150 * with the stack pointer in sleep.S.
151 */
152enum { SLEEP_SAVE_START = 0,
153
711be5cc
EM
154 SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2,
155
156 SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
157 SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
158 SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U,
159
160 SLEEP_SAVE_PSTR,
161
711be5cc
EM
162 SLEEP_SAVE_CKEN,
163
164 SLEEP_SAVE_SIZE
165};
166
167
168static void pxa25x_cpu_pm_save(unsigned long *sleep_save)
169{
711be5cc
EM
170 SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2);
171
172 SAVE(GAFR0_L); SAVE(GAFR0_U);
173 SAVE(GAFR1_L); SAVE(GAFR1_U);
174 SAVE(GAFR2_L); SAVE(GAFR2_U);
175
711be5cc
EM
176 SAVE(CKEN);
177 SAVE(PSTR);
56b11288
RP
178
179 /* Clear GPIO transition detect bits */
180 GEDR0 = GEDR0; GEDR1 = GEDR1; GEDR2 = GEDR2;
711be5cc
EM
181}
182
183static void pxa25x_cpu_pm_restore(unsigned long *sleep_save)
184{
56b11288
RP
185 /* ensure not to come back here if it wasn't intended */
186 PSPR = 0;
187
711be5cc 188 /* restore registers */
711be5cc
EM
189 RESTORE(GAFR0_L); RESTORE(GAFR0_U);
190 RESTORE(GAFR1_L); RESTORE(GAFR1_U);
191 RESTORE(GAFR2_L); RESTORE(GAFR2_U);
711be5cc
EM
192 RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2);
193
56b11288
RP
194 PSSR = PSSR_RDH | PSSR_PH;
195
711be5cc 196 RESTORE(CKEN);
711be5cc
EM
197 RESTORE(PSTR);
198}
199
200static void pxa25x_cpu_pm_enter(suspend_state_t state)
8775420d 201{
8775420d
TP
202 switch (state) {
203 case PM_SUSPEND_MEM:
204 /* set resume return address */
205 PSPR = virt_to_phys(pxa_cpu_resume);
b750a093 206 pxa25x_cpu_suspend(PWRMODE_SLEEP);
8775420d
TP
207 break;
208 }
209}
a8fa3f0c 210
711be5cc
EM
211static struct pxa_cpu_pm_fns pxa25x_cpu_pm_fns = {
212 .save_size = SLEEP_SAVE_SIZE,
26398a70 213 .valid = suspend_valid_only_mem,
711be5cc
EM
214 .save = pxa25x_cpu_pm_save,
215 .restore = pxa25x_cpu_pm_restore,
216 .enter = pxa25x_cpu_pm_enter,
e176bb05 217};
711be5cc
EM
218
219static void __init pxa25x_init_pm(void)
220{
221 pxa_cpu_pm_fns = &pxa25x_cpu_pm_fns;
222}
f79299ca 223#else
224static inline void pxa25x_init_pm(void) {}
a8fa3f0c 225#endif
e176bb05 226
c95530c7 227/* PXA25x: supports wakeup from GPIO0..GPIO15 and RTC alarm
228 */
229
230static int pxa25x_set_wake(unsigned int irq, unsigned int on)
231{
232 int gpio = IRQ_TO_GPIO(irq);
233 uint32_t gpio_bit, mask = 0;
234
235 if (gpio >= 0 && gpio <= 15) {
236 gpio_bit = GPIO_bit(gpio);
237 mask = gpio_bit;
238 if (on) {
239 if (GRER(gpio) | gpio_bit)
240 PRER |= gpio_bit;
241 else
242 PRER &= ~gpio_bit;
243
244 if (GFER(gpio) | gpio_bit)
245 PFER |= gpio_bit;
246 else
247 PFER &= ~gpio_bit;
248 }
249 goto set_pwer;
250 }
251
252 if (irq == IRQ_RTCAlrm) {
253 mask = PWER_RTC;
254 goto set_pwer;
255 }
256
257 return -EINVAL;
258
259set_pwer:
260 if (on)
261 PWER |= mask;
262 else
263 PWER &=~mask;
264
265 return 0;
266}
267
cd49104d
EM
268void __init pxa25x_init_irq(void)
269{
b9e25ace 270 pxa_init_irq(32, pxa25x_set_wake);
271 pxa_init_gpio(85, pxa25x_set_wake);
cd49104d
EM
272}
273
34f3231f 274static struct platform_device *pxa25x_devices[] __initdata = {
e09d02e1 275 &pxa_device_udc,
e09d02e1
EM
276 &pxa_device_ffuart,
277 &pxa_device_btuart,
278 &pxa_device_stuart,
e09d02e1 279 &pxa_device_i2s,
e09d02e1 280 &pxa_device_rtc,
d8e0db11 281 &pxa25x_device_ssp,
282 &pxa25x_device_nssp,
283 &pxa25x_device_assp,
34f3231f
RK
284};
285
c0165504 286static struct sys_device pxa25x_sysdev[] = {
287 {
288 .cls = &pxa_irq_sysclass,
16dfdbf0 289 }, {
290 .cls = &pxa_gpio_sysclass,
c0165504 291 },
292};
293
e176bb05
RK
294static int __init pxa25x_init(void)
295{
c0165504 296 int i, ret = 0;
f53f066c 297
e01dbdb4
DB
298 /* Only add HWUART for PXA255/26x; PXA210/250/27x do not have it. */
299 if (cpu_is_pxa25x())
300 clks_register(&pxa25x_hwuart_clk, 1);
301
e176bb05 302 if (cpu_is_pxa21x() || cpu_is_pxa25x()) {
a6dba20c
RK
303 clks_register(pxa25x_clks, ARRAY_SIZE(pxa25x_clks));
304
f53f066c
EM
305 if ((ret = pxa_init_dma(16)))
306 return ret;
f79299ca 307
711be5cc 308 pxa25x_init_pm();
f79299ca 309
c0165504 310 for (i = 0; i < ARRAY_SIZE(pxa25x_sysdev); i++) {
311 ret = sysdev_register(&pxa25x_sysdev[i]);
312 if (ret)
313 pr_err("failed to register sysdev[%d]\n", i);
314 }
315
34f3231f
RK
316 ret = platform_add_devices(pxa25x_devices,
317 ARRAY_SIZE(pxa25x_devices));
c0165504 318 if (ret)
319 return ret;
e176bb05 320 }
c0165504 321
34f3231f
RK
322 /* Only add HWUART for PXA255/26x; PXA210/250/27x do not have it. */
323 if (cpu_is_pxa25x())
e09d02e1 324 ret = platform_device_register(&pxa_device_hwuart);
34f3231f
RK
325
326 return ret;
e176bb05
RK
327}
328
329subsys_initcall(pxa25x_init);
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