2 * linux/arch/arm/mach-pxa/pxa27x.c
4 * Author: Nicolas Pitre
5 * Created: Nov 05, 2002
6 * Copyright: MontaVista Software Inc.
8 * Code specific to PXA27x aka Bulverde.
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.
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/suspend.h>
18 #include <linux/platform_device.h>
19 #include <linux/sysdev.h>
21 #include <mach/hardware.h>
23 #include <mach/irqs.h>
24 #include <mach/gpio.h>
25 #include <mach/pxa27x.h>
26 #include <mach/reset.h>
27 #include <mach/ohci.h>
36 void pxa27x_clear_otgph(void)
38 if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
41 EXPORT_SYMBOL(pxa27x_clear_otgph);
43 /* Crystal clock: 13MHz */
44 #define BASE_CLK 13000000
47 * Get the clock frequency as reflected by CCSR and the turbo flag.
48 * We assume these values have been applied via a fcs.
49 * If info is not 0 we also display the current settings.
51 unsigned int pxa27x_get_clk_frequency_khz(int info)
53 unsigned long ccsr, clkcfg;
54 unsigned int l, L, m, M, n2, N, S;
58 cccr_a = CCCR & (1 << 25);
60 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
61 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
62 t = clkcfg & (1 << 0);
63 ht = clkcfg & (1 << 2);
64 b = clkcfg & (1 << 3);
68 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
72 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
76 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
77 L / 1000000, (L % 1000000) / 10000, l );
78 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
79 N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
81 printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
82 M / 1000000, (M % 1000000) / 10000, m );
83 printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
84 S / 1000000, (S % 1000000) / 10000 );
87 return (t) ? (N/1000) : (L/1000);
91 * Return the current mem clock frequency in units of 10kHz as
92 * reflected by CCCR[A], B, and L
94 unsigned int pxa27x_get_memclk_frequency_10khz(void)
96 unsigned long ccsr, clkcfg;
97 unsigned int l, L, m, M;
101 cccr_a = CCCR & (1 << 25);
103 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
104 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
105 b = clkcfg & (1 << 3);
108 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
111 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
117 * Return the current LCD clock frequency in units of 10kHz as
119 static unsigned int pxa27x_get_lcdclk_frequency_10khz(void)
122 unsigned int l, L, k, K;
127 k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;
135 static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
137 return pxa27x_get_lcdclk_frequency_10khz() * 10000;
140 static const struct clkops clk_pxa27x_lcd_ops = {
141 .enable = clk_cken_enable,
142 .disable = clk_cken_disable,
143 .getrate = clk_pxa27x_lcd_getrate,
146 static DEFINE_CK(pxa27x_lcd, LCD, &clk_pxa27x_lcd_ops);
147 static DEFINE_CK(pxa27x_camera, CAMERA, &clk_pxa27x_lcd_ops);
148 static DEFINE_CKEN(pxa27x_ffuart, FFUART, 14857000, 1);
149 static DEFINE_CKEN(pxa27x_btuart, BTUART, 14857000, 1);
150 static DEFINE_CKEN(pxa27x_stuart, STUART, 14857000, 1);
151 static DEFINE_CKEN(pxa27x_i2s, I2S, 14682000, 0);
152 static DEFINE_CKEN(pxa27x_i2c, I2C, 32842000, 0);
153 static DEFINE_CKEN(pxa27x_usb, USB, 48000000, 5);
154 static DEFINE_CKEN(pxa27x_mmc, MMC, 19500000, 0);
155 static DEFINE_CKEN(pxa27x_ficp, FICP, 48000000, 0);
156 static DEFINE_CKEN(pxa27x_usbhost, USBHOST, 48000000, 0);
157 static DEFINE_CKEN(pxa27x_pwri2c, PWRI2C, 13000000, 0);
158 static DEFINE_CKEN(pxa27x_keypad, KEYPAD, 32768, 0);
159 static DEFINE_CKEN(pxa27x_ssp1, SSP1, 13000000, 0);
160 static DEFINE_CKEN(pxa27x_ssp2, SSP2, 13000000, 0);
161 static DEFINE_CKEN(pxa27x_ssp3, SSP3, 13000000, 0);
162 static DEFINE_CKEN(pxa27x_pwm0, PWM0, 13000000, 0);
163 static DEFINE_CKEN(pxa27x_pwm1, PWM1, 13000000, 0);
164 static DEFINE_CKEN(pxa27x_ac97, AC97, 24576000, 0);
165 static DEFINE_CKEN(pxa27x_ac97conf, AC97CONF, 24576000, 0);
166 static DEFINE_CKEN(pxa27x_msl, MSL, 48000000, 0);
167 static DEFINE_CKEN(pxa27x_usim, USIM, 48000000, 0);
168 static DEFINE_CKEN(pxa27x_memstk, MEMSTK, 19500000, 0);
169 static DEFINE_CKEN(pxa27x_im, IM, 0, 0);
170 static DEFINE_CKEN(pxa27x_memc, MEMC, 0, 0);
172 static struct clk_lookup pxa27x_clkregs[] = {
173 INIT_CLKREG(&clk_pxa27x_lcd, "pxa2xx-fb", NULL),
174 INIT_CLKREG(&clk_pxa27x_camera, "pxa27x-camera.0", NULL),
175 INIT_CLKREG(&clk_pxa27x_ffuart, "pxa2xx-uart.0", NULL),
176 INIT_CLKREG(&clk_pxa27x_btuart, "pxa2xx-uart.1", NULL),
177 INIT_CLKREG(&clk_pxa27x_stuart, "pxa2xx-uart.2", NULL),
178 INIT_CLKREG(&clk_pxa27x_i2s, "pxa2xx-i2s", NULL),
179 INIT_CLKREG(&clk_pxa27x_i2c, "pxa2xx-i2c.0", NULL),
180 INIT_CLKREG(&clk_pxa27x_usb, "pxa27x-udc", NULL),
181 INIT_CLKREG(&clk_pxa27x_mmc, "pxa2xx-mci.0", NULL),
182 INIT_CLKREG(&clk_pxa27x_stuart, "pxa2xx-ir", "UARTCLK"),
183 INIT_CLKREG(&clk_pxa27x_ficp, "pxa2xx-ir", "FICPCLK"),
184 INIT_CLKREG(&clk_pxa27x_usbhost, "pxa27x-ohci", NULL),
185 INIT_CLKREG(&clk_pxa27x_pwri2c, "pxa2xx-i2c.1", NULL),
186 INIT_CLKREG(&clk_pxa27x_keypad, "pxa27x-keypad", NULL),
187 INIT_CLKREG(&clk_pxa27x_ssp1, "pxa27x-ssp.0", NULL),
188 INIT_CLKREG(&clk_pxa27x_ssp2, "pxa27x-ssp.1", NULL),
189 INIT_CLKREG(&clk_pxa27x_ssp3, "pxa27x-ssp.2", NULL),
190 INIT_CLKREG(&clk_pxa27x_pwm0, "pxa27x-pwm.0", NULL),
191 INIT_CLKREG(&clk_pxa27x_pwm1, "pxa27x-pwm.1", NULL),
192 INIT_CLKREG(&clk_pxa27x_ac97, NULL, "AC97CLK"),
193 INIT_CLKREG(&clk_pxa27x_ac97conf, NULL, "AC97CONFCLK"),
194 INIT_CLKREG(&clk_pxa27x_msl, NULL, "MSLCLK"),
195 INIT_CLKREG(&clk_pxa27x_usim, NULL, "USIMCLK"),
196 INIT_CLKREG(&clk_pxa27x_memstk, NULL, "MSTKCLK"),
197 INIT_CLKREG(&clk_pxa27x_im, NULL, "IMCLK"),
198 INIT_CLKREG(&clk_pxa27x_memc, NULL, "MEMCLK"),
203 #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
204 #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
207 * allow platforms to override default PWRMODE setting used for PM_SUSPEND_MEM
209 static unsigned int pwrmode = PWRMODE_SLEEP;
211 int __init pxa27x_set_pwrmode(unsigned int mode)
215 case PWRMODE_DEEPSLEEP:
224 * List of global PXA peripheral registers to preserve.
225 * More ones like CP and general purpose register values are preserved
226 * with the stack pointer in sleep.S.
236 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
245 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
250 PSSR = PSSR_RDH | PSSR_PH;
256 void pxa27x_cpu_pm_enter(suspend_state_t state)
258 extern void pxa_cpu_standby(void);
260 /* ensure voltage-change sequencer not initiated, which hangs */
263 /* Clear edge-detect status register. */
266 /* Clear reset status */
267 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
270 case PM_SUSPEND_STANDBY:
274 pxa27x_cpu_suspend(pwrmode);
279 static int pxa27x_cpu_pm_valid(suspend_state_t state)
281 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
284 static int pxa27x_cpu_pm_prepare(void)
286 /* set resume return address */
287 PSPR = virt_to_phys(pxa_cpu_resume);
291 static void pxa27x_cpu_pm_finish(void)
293 /* ensure not to come back here if it wasn't intended */
297 static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
298 .save_count = SLEEP_SAVE_COUNT,
299 .save = pxa27x_cpu_pm_save,
300 .restore = pxa27x_cpu_pm_restore,
301 .valid = pxa27x_cpu_pm_valid,
302 .enter = pxa27x_cpu_pm_enter,
303 .prepare = pxa27x_cpu_pm_prepare,
304 .finish = pxa27x_cpu_pm_finish,
307 static void __init pxa27x_init_pm(void)
309 pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
312 static inline void pxa27x_init_pm(void) {}
315 /* PXA27x: Various gpios can issue wakeup events. This logic only
316 * handles the simple cases, not the WEMUX2 and WEMUX3 options
318 static int pxa27x_set_wake(unsigned int irq, unsigned int on)
320 int gpio = IRQ_TO_GPIO(irq);
323 if (gpio >= 0 && gpio < 128)
324 return gpio_set_wake(gpio, on);
326 if (irq == IRQ_KEYPAD)
327 return keypad_set_wake(on);
348 void __init pxa27x_init_irq(void)
350 pxa_init_irq(34, pxa27x_set_wake);
351 pxa_init_gpio(IRQ_GPIO_2_x, 2, 120, pxa27x_set_wake);
355 * device registration specific to PXA27x.
357 void __init pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info)
362 pxa_register_device(&pxa27x_device_i2c_power, info);
365 static struct platform_device *devices[] __initdata = {
380 static struct sys_device pxa27x_sysdev[] = {
382 .cls = &pxa_irq_sysclass,
384 .cls = &pxa2xx_mfp_sysclass,
386 .cls = &pxa_gpio_sysclass,
390 static int __init pxa27x_init(void)
394 if (cpu_is_pxa27x()) {
398 clks_register(pxa27x_clkregs, ARRAY_SIZE(pxa27x_clkregs));
400 if ((ret = pxa_init_dma(IRQ_DMA, 32)))
405 for (i = 0; i < ARRAY_SIZE(pxa27x_sysdev); i++) {
406 ret = sysdev_register(&pxa27x_sysdev[i]);
408 pr_err("failed to register sysdev[%d]\n", i);
411 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
417 postcore_initcall(pxa27x_init);