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>
20 #include <asm/hardware.h>
22 #include <asm/arch/irqs.h>
23 #include <asm/arch/pxa-regs.h>
24 #include <asm/arch/ohci.h>
25 #include <asm/arch/pm.h>
26 #include <asm/arch/dma.h>
32 /* Crystal clock: 13MHz */
33 #define BASE_CLK 13000000
36 * Get the clock frequency as reflected by CCSR and the turbo flag.
37 * We assume these values have been applied via a fcs.
38 * If info is not 0 we also display the current settings.
40 unsigned int pxa27x_get_clk_frequency_khz(int info)
42 unsigned long ccsr, clkcfg;
43 unsigned int l, L, m, M, n2, N, S;
47 cccr_a = CCCR & (1 << 25);
49 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
50 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
51 t = clkcfg & (1 << 0);
52 ht = clkcfg & (1 << 2);
53 b = clkcfg & (1 << 3);
57 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
61 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
65 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
66 L / 1000000, (L % 1000000) / 10000, l );
67 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
68 N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
70 printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
71 M / 1000000, (M % 1000000) / 10000, m );
72 printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
73 S / 1000000, (S % 1000000) / 10000 );
76 return (t) ? (N/1000) : (L/1000);
80 * Return the current mem clock frequency in units of 10kHz as
81 * reflected by CCCR[A], B, and L
83 unsigned int pxa27x_get_memclk_frequency_10khz(void)
85 unsigned long ccsr, clkcfg;
86 unsigned int l, L, m, M;
90 cccr_a = CCCR & (1 << 25);
92 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
93 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
94 b = clkcfg & (1 << 3);
97 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
100 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
106 * Return the current LCD clock frequency in units of 10kHz as
108 static unsigned int pxa27x_get_lcdclk_frequency_10khz(void)
111 unsigned int l, L, k, K;
116 k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;
124 static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
126 return pxa27x_get_lcdclk_frequency_10khz() * 10000;
129 static const struct clkops clk_pxa27x_lcd_ops = {
130 .enable = clk_cken_enable,
131 .disable = clk_cken_disable,
132 .getrate = clk_pxa27x_lcd_getrate,
135 static struct clk pxa27x_clks[] = {
136 INIT_CK("LCDCLK", LCD, &clk_pxa27x_lcd_ops, &pxa_device_fb.dev),
137 INIT_CK("CAMCLK", CAMERA, &clk_pxa27x_lcd_ops, NULL),
139 INIT_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
140 INIT_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
141 INIT_CKEN("UARTCLK", STUART, 14857000, 1, NULL),
143 INIT_CKEN("I2SCLK", I2S, 14682000, 0, &pxa_device_i2s.dev),
144 INIT_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev),
145 INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa_device_udc.dev),
146 INIT_CKEN("MMCCLK", MMC, 19500000, 0, &pxa_device_mci.dev),
147 INIT_CKEN("FICPCLK", FICP, 48000000, 0, &pxa_device_ficp.dev),
149 INIT_CKEN("USBCLK", USBHOST, 48000000, 0, &pxa27x_device_ohci.dev),
150 INIT_CKEN("I2CCLK", PWRI2C, 13000000, 0, &pxa27x_device_i2c_power.dev),
151 INIT_CKEN("KBDCLK", KEYPAD, 32768, 0, NULL),
154 INIT_CKEN("PWMCLK", PWM0, 13000000, 0, NULL),
155 INIT_CKEN("SSPCLK", SSP1, 13000000, 0, NULL),
156 INIT_CKEN("SSPCLK", SSP2, 13000000, 0, NULL),
157 INIT_CKEN("SSPCLK", SSP3, 13000000, 0, NULL),
158 INIT_CKEN("MSLCLK", MSL, 48000000, 0, NULL),
159 INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL),
160 INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL),
161 INIT_CKEN("IMCLK", IM, 0, 0, NULL),
162 INIT_CKEN("MEMCLK", MEMC, 0, 0, NULL),
168 #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
169 #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
171 #define RESTORE_GPLEVEL(n) do { \
172 GPSR##n = sleep_save[SLEEP_SAVE_GPLR##n]; \
173 GPCR##n = ~sleep_save[SLEEP_SAVE_GPLR##n]; \
177 * List of global PXA peripheral registers to preserve.
178 * More ones like CP and general purpose register values are preserved
179 * with the stack pointer in sleep.S.
181 enum { SLEEP_SAVE_START = 0,
183 SLEEP_SAVE_GPLR0, SLEEP_SAVE_GPLR1, SLEEP_SAVE_GPLR2, SLEEP_SAVE_GPLR3,
184 SLEEP_SAVE_GPDR0, SLEEP_SAVE_GPDR1, SLEEP_SAVE_GPDR2, SLEEP_SAVE_GPDR3,
185 SLEEP_SAVE_GRER0, SLEEP_SAVE_GRER1, SLEEP_SAVE_GRER2, SLEEP_SAVE_GRER3,
186 SLEEP_SAVE_GFER0, SLEEP_SAVE_GFER1, SLEEP_SAVE_GFER2, SLEEP_SAVE_GFER3,
187 SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,
189 SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
190 SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
191 SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U,
192 SLEEP_SAVE_GAFR3_L, SLEEP_SAVE_GAFR3_U,
200 SLEEP_SAVE_PWER, SLEEP_SAVE_PCFR, SLEEP_SAVE_PRER,
201 SLEEP_SAVE_PFER, SLEEP_SAVE_PKWR,
206 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
208 SAVE(GPLR0); SAVE(GPLR1); SAVE(GPLR2); SAVE(GPLR3);
209 SAVE(GPDR0); SAVE(GPDR1); SAVE(GPDR2); SAVE(GPDR3);
210 SAVE(GRER0); SAVE(GRER1); SAVE(GRER2); SAVE(GRER3);
211 SAVE(GFER0); SAVE(GFER1); SAVE(GFER2); SAVE(GFER3);
212 SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); SAVE(PGSR3);
214 SAVE(GAFR0_L); SAVE(GAFR0_U);
215 SAVE(GAFR1_L); SAVE(GAFR1_U);
216 SAVE(GAFR2_L); SAVE(GAFR2_U);
217 SAVE(GAFR3_L); SAVE(GAFR3_U);
220 SAVE(PWER); SAVE(PCFR); SAVE(PRER);
221 SAVE(PFER); SAVE(PKWR);
223 SAVE(ICMR); ICMR = 0;
227 /* Clear GPIO transition detect bits */
228 GEDR0 = GEDR0; GEDR1 = GEDR1; GEDR2 = GEDR2; GEDR3 = GEDR3;
231 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
233 /* ensure not to come back here if it wasn't intended */
236 /* restore registers */
237 RESTORE_GPLEVEL(0); RESTORE_GPLEVEL(1);
238 RESTORE_GPLEVEL(2); RESTORE_GPLEVEL(3);
239 RESTORE(GPDR0); RESTORE(GPDR1); RESTORE(GPDR2); RESTORE(GPDR3);
240 RESTORE(GAFR0_L); RESTORE(GAFR0_U);
241 RESTORE(GAFR1_L); RESTORE(GAFR1_U);
242 RESTORE(GAFR2_L); RESTORE(GAFR2_U);
243 RESTORE(GAFR3_L); RESTORE(GAFR3_U);
244 RESTORE(GRER0); RESTORE(GRER1); RESTORE(GRER2); RESTORE(GRER3);
245 RESTORE(GFER0); RESTORE(GFER1); RESTORE(GFER2); RESTORE(GFER3);
246 RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); RESTORE(PGSR3);
249 RESTORE(PWER); RESTORE(PCFR); RESTORE(PRER);
250 RESTORE(PFER); RESTORE(PKWR);
252 PSSR = PSSR_RDH | PSSR_PH;
262 void pxa27x_cpu_pm_enter(suspend_state_t state)
264 extern void pxa_cpu_standby(void);
266 if (state == PM_SUSPEND_STANDBY)
267 CKEN = (1 << CKEN_MEMC) | (1 << CKEN_OSTIMER) |
268 (1 << CKEN_LCD) | (1 << CKEN_PWM0);
270 CKEN = (1 << CKEN_MEMC) | (1 << CKEN_OSTIMER);
272 /* ensure voltage-change sequencer not initiated, which hangs */
275 /* Clear edge-detect status register. */
279 case PM_SUSPEND_STANDBY:
283 /* set resume return address */
284 PSPR = virt_to_phys(pxa_cpu_resume);
285 pxa27x_cpu_suspend(PWRMODE_SLEEP);
290 static int pxa27x_cpu_pm_valid(suspend_state_t state)
292 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
295 static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
296 .save_size = SLEEP_SAVE_SIZE,
297 .save = pxa27x_cpu_pm_save,
298 .restore = pxa27x_cpu_pm_restore,
299 .valid = pxa27x_cpu_pm_valid,
300 .enter = pxa27x_cpu_pm_enter,
303 static void __init pxa27x_init_pm(void)
305 pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
309 /* PXA27x: Various gpios can issue wakeup events. This logic only
310 * handles the simple cases, not the WEMUX2 and WEMUX3 options
312 #define PXA27x_GPIO_NOWAKE_MASK \
313 ((1 << 8) | (1 << 7) | (1 << 6) | (1 << 5) | (1 << 2))
314 #define WAKEMASK(gpio) \
316 ? ((1 << (gpio)) & ~PXA27x_GPIO_NOWAKE_MASK) \
317 : ((gpio == 35) ? (1 << 24) : 0))
319 static int pxa27x_set_wake(unsigned int irq, unsigned int on)
321 int gpio = IRQ_TO_GPIO(irq);
324 if ((gpio >= 0 && gpio <= 15) || (gpio == 35)) {
325 if (WAKEMASK(gpio) == 0)
328 mask = WAKEMASK(gpio);
331 if (GRER(gpio) | GPIO_bit(gpio))
336 if (GFER(gpio) | GPIO_bit(gpio))
364 void __init pxa27x_init_irq(void)
368 pxa_init_irq_gpio(128);
369 pxa_init_irq_set_wake(pxa27x_set_wake);
373 * device registration specific to PXA27x.
376 static u64 pxa27x_dmamask = 0xffffffffUL;
378 static struct resource pxa27x_ohci_resources[] = {
382 .flags = IORESOURCE_MEM,
387 .flags = IORESOURCE_IRQ,
391 struct platform_device pxa27x_device_ohci = {
392 .name = "pxa27x-ohci",
395 .dma_mask = &pxa27x_dmamask,
396 .coherent_dma_mask = 0xffffffff,
398 .num_resources = ARRAY_SIZE(pxa27x_ohci_resources),
399 .resource = pxa27x_ohci_resources,
402 void __init pxa_set_ohci_info(struct pxaohci_platform_data *info)
404 pxa27x_device_ohci.dev.platform_data = info;
407 static struct resource i2c_power_resources[] = {
411 .flags = IORESOURCE_MEM,
415 .flags = IORESOURCE_IRQ,
419 struct platform_device pxa27x_device_i2c_power = {
420 .name = "pxa2xx-i2c",
422 .resource = i2c_power_resources,
423 .num_resources = ARRAY_SIZE(i2c_power_resources),
426 static struct platform_device *devices[] __initdata = {
437 &pxa27x_device_i2c_power,
441 static int __init pxa27x_init(void)
444 if (cpu_is_pxa27x()) {
445 clks_register(pxa27x_clks, ARRAY_SIZE(pxa27x_clks));
447 if ((ret = pxa_init_dma(32)))
452 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
457 subsys_initcall(pxa27x_init);