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/pxa-regs.h>
25 #include <mach/pxa2xx-regs.h>
26 #include <mach/mfp-pxa27x.h>
27 #include <mach/reset.h>
28 #include <mach/ohci.h>
37 void pxa27x_clear_otgph(void)
39 if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
42 EXPORT_SYMBOL(pxa27x_clear_otgph);
44 /* Crystal clock: 13MHz */
45 #define BASE_CLK 13000000
48 * Get the clock frequency as reflected by CCSR and the turbo flag.
49 * We assume these values have been applied via a fcs.
50 * If info is not 0 we also display the current settings.
52 unsigned int pxa27x_get_clk_frequency_khz(int info)
54 unsigned long ccsr, clkcfg;
55 unsigned int l, L, m, M, n2, N, S;
59 cccr_a = CCCR & (1 << 25);
61 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
62 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
63 t = clkcfg & (1 << 0);
64 ht = clkcfg & (1 << 2);
65 b = clkcfg & (1 << 3);
69 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
73 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
77 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
78 L / 1000000, (L % 1000000) / 10000, l );
79 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
80 N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
82 printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
83 M / 1000000, (M % 1000000) / 10000, m );
84 printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
85 S / 1000000, (S % 1000000) / 10000 );
88 return (t) ? (N/1000) : (L/1000);
92 * Return the current mem clock frequency in units of 10kHz as
93 * reflected by CCCR[A], B, and L
95 unsigned int pxa27x_get_memclk_frequency_10khz(void)
97 unsigned long ccsr, clkcfg;
98 unsigned int l, L, m, M;
102 cccr_a = CCCR & (1 << 25);
104 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
105 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
106 b = clkcfg & (1 << 3);
109 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
112 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
118 * Return the current LCD clock frequency in units of 10kHz as
120 static unsigned int pxa27x_get_lcdclk_frequency_10khz(void)
123 unsigned int l, L, k, K;
128 k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;
136 static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
138 return pxa27x_get_lcdclk_frequency_10khz() * 10000;
141 static const struct clkops clk_pxa27x_lcd_ops = {
142 .enable = clk_cken_enable,
143 .disable = clk_cken_disable,
144 .getrate = clk_pxa27x_lcd_getrate,
147 static DEFINE_CK(pxa27x_lcd, LCD, &clk_pxa27x_lcd_ops);
148 static DEFINE_CK(pxa27x_camera, CAMERA, &clk_pxa27x_lcd_ops);
149 static DEFINE_CKEN(pxa27x_ffuart, FFUART, 14857000, 1);
150 static DEFINE_CKEN(pxa27x_btuart, BTUART, 14857000, 1);
151 static DEFINE_CKEN(pxa27x_stuart, STUART, 14857000, 1);
152 static DEFINE_CKEN(pxa27x_i2s, I2S, 14682000, 0);
153 static DEFINE_CKEN(pxa27x_i2c, I2C, 32842000, 0);
154 static DEFINE_CKEN(pxa27x_usb, USB, 48000000, 5);
155 static DEFINE_CKEN(pxa27x_mmc, MMC, 19500000, 0);
156 static DEFINE_CKEN(pxa27x_ficp, FICP, 48000000, 0);
157 static DEFINE_CKEN(pxa27x_usbhost, USBHOST, 48000000, 0);
158 static DEFINE_CKEN(pxa27x_pwri2c, PWRI2C, 13000000, 0);
159 static DEFINE_CKEN(pxa27x_keypad, KEYPAD, 32768, 0);
160 static DEFINE_CKEN(pxa27x_ssp1, SSP1, 13000000, 0);
161 static DEFINE_CKEN(pxa27x_ssp2, SSP2, 13000000, 0);
162 static DEFINE_CKEN(pxa27x_ssp3, SSP3, 13000000, 0);
163 static DEFINE_CKEN(pxa27x_pwm0, PWM0, 13000000, 0);
164 static DEFINE_CKEN(pxa27x_pwm1, PWM1, 13000000, 0);
165 static DEFINE_CKEN(pxa27x_ac97, AC97, 24576000, 0);
166 static DEFINE_CKEN(pxa27x_ac97conf, AC97CONF, 24576000, 0);
167 static DEFINE_CKEN(pxa27x_msl, MSL, 48000000, 0);
168 static DEFINE_CKEN(pxa27x_usim, USIM, 48000000, 0);
169 static DEFINE_CKEN(pxa27x_memstk, MEMSTK, 19500000, 0);
170 static DEFINE_CKEN(pxa27x_im, IM, 0, 0);
171 static DEFINE_CKEN(pxa27x_memc, MEMC, 0, 0);
173 static struct clk_lookup pxa27x_clkregs[] = {
174 INIT_CLKREG(&clk_pxa27x_lcd, "pxa2xx-fb", NULL),
175 INIT_CLKREG(&clk_pxa27x_camera, "pxa27x-camera.0", NULL),
176 INIT_CLKREG(&clk_pxa27x_ffuart, "pxa2xx-uart.0", NULL),
177 INIT_CLKREG(&clk_pxa27x_btuart, "pxa2xx-uart.1", NULL),
178 INIT_CLKREG(&clk_pxa27x_stuart, "pxa2xx-uart.2", NULL),
179 INIT_CLKREG(&clk_pxa27x_i2s, "pxa2xx-i2s", NULL),
180 INIT_CLKREG(&clk_pxa27x_i2c, "pxa2xx-i2c.0", NULL),
181 INIT_CLKREG(&clk_pxa27x_usb, "pxa27x-udc", NULL),
182 INIT_CLKREG(&clk_pxa27x_mmc, "pxa2xx-mci.0", NULL),
183 INIT_CLKREG(&clk_pxa27x_stuart, "pxa2xx-ir", "UARTCLK"),
184 INIT_CLKREG(&clk_pxa27x_ficp, "pxa2xx-ir", "FICPCLK"),
185 INIT_CLKREG(&clk_pxa27x_usbhost, "pxa27x-ohci", NULL),
186 INIT_CLKREG(&clk_pxa27x_pwri2c, "pxa2xx-i2c.1", NULL),
187 INIT_CLKREG(&clk_pxa27x_keypad, "pxa27x-keypad", NULL),
188 INIT_CLKREG(&clk_pxa27x_ssp1, "pxa27x-ssp.0", NULL),
189 INIT_CLKREG(&clk_pxa27x_ssp2, "pxa27x-ssp.1", NULL),
190 INIT_CLKREG(&clk_pxa27x_ssp3, "pxa27x-ssp.2", NULL),
191 INIT_CLKREG(&clk_pxa27x_pwm0, "pxa27x-pwm.0", NULL),
192 INIT_CLKREG(&clk_pxa27x_pwm1, "pxa27x-pwm.1", NULL),
193 INIT_CLKREG(&clk_pxa27x_ac97, NULL, "AC97CLK"),
194 INIT_CLKREG(&clk_pxa27x_ac97conf, NULL, "AC97CONFCLK"),
195 INIT_CLKREG(&clk_pxa27x_msl, NULL, "MSLCLK"),
196 INIT_CLKREG(&clk_pxa27x_usim, NULL, "USIMCLK"),
197 INIT_CLKREG(&clk_pxa27x_memstk, NULL, "MSTKCLK"),
198 INIT_CLKREG(&clk_pxa27x_im, NULL, "IMCLK"),
199 INIT_CLKREG(&clk_pxa27x_memc, NULL, "MEMCLK"),
204 #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
205 #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
208 * List of global PXA peripheral registers to preserve.
209 * More ones like CP and general purpose register values are preserved
210 * with the stack pointer in sleep.S.
220 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
229 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
234 PSSR = PSSR_RDH | PSSR_PH;
240 void pxa27x_cpu_pm_enter(suspend_state_t state)
242 extern void pxa_cpu_standby(void);
244 /* ensure voltage-change sequencer not initiated, which hangs */
247 /* Clear edge-detect status register. */
250 /* Clear reset status */
251 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
254 case PM_SUSPEND_STANDBY:
258 pxa27x_cpu_suspend(PWRMODE_SLEEP);
263 static int pxa27x_cpu_pm_valid(suspend_state_t state)
265 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
268 static int pxa27x_cpu_pm_prepare(void)
270 /* set resume return address */
271 PSPR = virt_to_phys(pxa_cpu_resume);
275 static void pxa27x_cpu_pm_finish(void)
277 /* ensure not to come back here if it wasn't intended */
281 static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
282 .save_count = SLEEP_SAVE_COUNT,
283 .save = pxa27x_cpu_pm_save,
284 .restore = pxa27x_cpu_pm_restore,
285 .valid = pxa27x_cpu_pm_valid,
286 .enter = pxa27x_cpu_pm_enter,
287 .prepare = pxa27x_cpu_pm_prepare,
288 .finish = pxa27x_cpu_pm_finish,
291 static void __init pxa27x_init_pm(void)
293 pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
296 static inline void pxa27x_init_pm(void) {}
299 /* PXA27x: Various gpios can issue wakeup events. This logic only
300 * handles the simple cases, not the WEMUX2 and WEMUX3 options
302 static int pxa27x_set_wake(unsigned int irq, unsigned int on)
304 int gpio = IRQ_TO_GPIO(irq);
307 if (gpio >= 0 && gpio < 128)
308 return gpio_set_wake(gpio, on);
310 if (irq == IRQ_KEYPAD)
311 return keypad_set_wake(on);
332 void __init pxa27x_init_irq(void)
334 pxa_init_irq(34, pxa27x_set_wake);
335 pxa_init_gpio(121, pxa27x_set_wake);
339 * device registration specific to PXA27x.
341 void __init pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info)
346 pxa_register_device(&pxa27x_device_i2c_power, info);
349 static struct platform_device *devices[] __initdata = {
364 static struct sys_device pxa27x_sysdev[] = {
366 .cls = &pxa_irq_sysclass,
368 .cls = &pxa2xx_mfp_sysclass,
370 .cls = &pxa_gpio_sysclass,
374 static int __init pxa27x_init(void)
378 if (cpu_is_pxa27x()) {
382 clks_register(pxa27x_clkregs, ARRAY_SIZE(pxa27x_clkregs));
384 if ((ret = pxa_init_dma(32)))
389 for (i = 0; i < ARRAY_SIZE(pxa27x_sysdev); i++) {
390 ret = sysdev_register(&pxa27x_sysdev[i]);
392 pr_err("failed to register sysdev[%d]\n", i);
395 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
401 postcore_initcall(pxa27x_init);