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 <asm/hardware.h>
23 #include <asm/arch/irqs.h>
24 #include <asm/arch/pxa-regs.h>
25 #include <asm/arch/pxa2xx-regs.h>
26 #include <asm/arch/mfp-pxa27x.h>
27 #include <asm/arch/ohci.h>
28 #include <asm/arch/pm.h>
29 #include <asm/arch/dma.h>
30 #include <asm/arch/i2c.h>
36 /* Crystal clock: 13MHz */
37 #define BASE_CLK 13000000
40 * Get the clock frequency as reflected by CCSR and the turbo flag.
41 * We assume these values have been applied via a fcs.
42 * If info is not 0 we also display the current settings.
44 unsigned int pxa27x_get_clk_frequency_khz(int info)
46 unsigned long ccsr, clkcfg;
47 unsigned int l, L, m, M, n2, N, S;
51 cccr_a = CCCR & (1 << 25);
53 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
54 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
55 t = clkcfg & (1 << 0);
56 ht = clkcfg & (1 << 2);
57 b = clkcfg & (1 << 3);
61 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
65 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
69 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
70 L / 1000000, (L % 1000000) / 10000, l );
71 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
72 N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
74 printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
75 M / 1000000, (M % 1000000) / 10000, m );
76 printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
77 S / 1000000, (S % 1000000) / 10000 );
80 return (t) ? (N/1000) : (L/1000);
84 * Return the current mem clock frequency in units of 10kHz as
85 * reflected by CCCR[A], B, and L
87 unsigned int pxa27x_get_memclk_frequency_10khz(void)
89 unsigned long ccsr, clkcfg;
90 unsigned int l, L, m, M;
94 cccr_a = CCCR & (1 << 25);
96 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
97 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
98 b = clkcfg & (1 << 3);
101 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
104 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
110 * Return the current LCD clock frequency in units of 10kHz as
112 static unsigned int pxa27x_get_lcdclk_frequency_10khz(void)
115 unsigned int l, L, k, K;
120 k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;
128 static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
130 return pxa27x_get_lcdclk_frequency_10khz() * 10000;
133 static const struct clkops clk_pxa27x_lcd_ops = {
134 .enable = clk_cken_enable,
135 .disable = clk_cken_disable,
136 .getrate = clk_pxa27x_lcd_getrate,
139 static struct clk pxa27x_clks[] = {
140 INIT_CK("LCDCLK", LCD, &clk_pxa27x_lcd_ops, &pxa_device_fb.dev),
141 INIT_CK("CAMCLK", CAMERA, &clk_pxa27x_lcd_ops, NULL),
143 INIT_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
144 INIT_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
145 INIT_CKEN("UARTCLK", STUART, 14857000, 1, NULL),
147 INIT_CKEN("I2SCLK", I2S, 14682000, 0, &pxa_device_i2s.dev),
148 INIT_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev),
149 INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa_device_udc.dev),
150 INIT_CKEN("MMCCLK", MMC, 19500000, 0, &pxa_device_mci.dev),
151 INIT_CKEN("FICPCLK", FICP, 48000000, 0, &pxa_device_ficp.dev),
153 INIT_CKEN("USBCLK", USBHOST, 48000000, 0, &pxa27x_device_ohci.dev),
154 INIT_CKEN("I2CCLK", PWRI2C, 13000000, 0, &pxa27x_device_i2c_power.dev),
155 INIT_CKEN("KBDCLK", KEYPAD, 32768, 0, &pxa27x_device_keypad.dev),
157 INIT_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
158 INIT_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
159 INIT_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
161 INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
162 INIT_CKEN("AC97CONFCLK", AC97CONF, 24576000, 0, NULL),
165 INIT_CKEN("PWMCLK", PWM0, 13000000, 0, NULL),
166 INIT_CKEN("MSLCLK", MSL, 48000000, 0, NULL),
167 INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL),
168 INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL),
169 INIT_CKEN("IMCLK", IM, 0, 0, NULL),
170 INIT_CKEN("MEMCLK", MEMC, 0, 0, NULL),
176 #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
177 #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
180 * List of global PXA peripheral registers to preserve.
181 * More ones like CP and general purpose register values are preserved
182 * with the stack pointer in sleep.S.
184 enum { SLEEP_SAVE_PGSR0, SLEEP_SAVE_PGSR1, SLEEP_SAVE_PGSR2, SLEEP_SAVE_PGSR3,
186 SLEEP_SAVE_GAFR0_L, SLEEP_SAVE_GAFR0_U,
187 SLEEP_SAVE_GAFR1_L, SLEEP_SAVE_GAFR1_U,
188 SLEEP_SAVE_GAFR2_L, SLEEP_SAVE_GAFR2_U,
189 SLEEP_SAVE_GAFR3_L, SLEEP_SAVE_GAFR3_U,
196 SLEEP_SAVE_PWER, SLEEP_SAVE_PCFR, SLEEP_SAVE_PRER,
197 SLEEP_SAVE_PFER, SLEEP_SAVE_PKWR,
202 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
204 SAVE(PGSR0); SAVE(PGSR1); SAVE(PGSR2); SAVE(PGSR3);
206 SAVE(GAFR0_L); SAVE(GAFR0_U);
207 SAVE(GAFR1_L); SAVE(GAFR1_U);
208 SAVE(GAFR2_L); SAVE(GAFR2_U);
209 SAVE(GAFR3_L); SAVE(GAFR3_U);
212 SAVE(PWER); SAVE(PCFR); SAVE(PRER);
213 SAVE(PFER); SAVE(PKWR);
219 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
221 /* ensure not to come back here if it wasn't intended */
224 /* restore registers */
225 RESTORE(GAFR0_L); RESTORE(GAFR0_U);
226 RESTORE(GAFR1_L); RESTORE(GAFR1_U);
227 RESTORE(GAFR2_L); RESTORE(GAFR2_U);
228 RESTORE(GAFR3_L); RESTORE(GAFR3_U);
229 RESTORE(PGSR0); RESTORE(PGSR1); RESTORE(PGSR2); RESTORE(PGSR3);
232 RESTORE(PWER); RESTORE(PCFR); RESTORE(PRER);
233 RESTORE(PFER); RESTORE(PKWR);
235 PSSR = PSSR_RDH | PSSR_PH;
242 void pxa27x_cpu_pm_enter(suspend_state_t state)
244 extern void pxa_cpu_standby(void);
246 /* ensure voltage-change sequencer not initiated, which hangs */
249 /* Clear edge-detect status register. */
252 /* Clear reset status */
253 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
256 case PM_SUSPEND_STANDBY:
260 /* set resume return address */
261 PSPR = virt_to_phys(pxa_cpu_resume);
262 pxa27x_cpu_suspend(PWRMODE_SLEEP);
267 static int pxa27x_cpu_pm_valid(suspend_state_t state)
269 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
272 static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
273 .save_count = SLEEP_SAVE_COUNT,
274 .save = pxa27x_cpu_pm_save,
275 .restore = pxa27x_cpu_pm_restore,
276 .valid = pxa27x_cpu_pm_valid,
277 .enter = pxa27x_cpu_pm_enter,
280 static void __init pxa27x_init_pm(void)
282 pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
285 static inline void pxa27x_init_pm(void) {}
288 /* PXA27x: Various gpios can issue wakeup events. This logic only
289 * handles the simple cases, not the WEMUX2 and WEMUX3 options
291 static int pxa27x_set_wake(unsigned int irq, unsigned int on)
293 int gpio = IRQ_TO_GPIO(irq);
296 if (gpio >= 0 && gpio < 128)
297 return gpio_set_wake(gpio, on);
299 if (irq == IRQ_KEYPAD)
300 return keypad_set_wake(on);
321 void __init pxa27x_init_irq(void)
323 pxa_init_irq(34, pxa27x_set_wake);
324 pxa_init_gpio(128, pxa27x_set_wake);
328 * device registration specific to PXA27x.
331 static struct resource i2c_power_resources[] = {
335 .flags = IORESOURCE_MEM,
339 .flags = IORESOURCE_IRQ,
343 struct platform_device pxa27x_device_i2c_power = {
344 .name = "pxa2xx-i2c",
346 .resource = i2c_power_resources,
347 .num_resources = ARRAY_SIZE(i2c_power_resources),
350 void __init pxa_set_i2c_power_info(struct i2c_pxa_platform_data *info)
352 pxa27x_device_i2c_power.dev.platform_data = info;
355 static struct platform_device *devices[] __initdata = {
362 &pxa27x_device_i2c_power,
368 static struct sys_device pxa27x_sysdev[] = {
370 .cls = &pxa_irq_sysclass,
372 .cls = &pxa_gpio_sysclass,
376 static int __init pxa27x_init(void)
380 if (cpu_is_pxa27x()) {
381 clks_register(pxa27x_clks, ARRAY_SIZE(pxa27x_clks));
383 if ((ret = pxa_init_dma(32)))
388 for (i = 0; i < ARRAY_SIZE(pxa27x_sysdev); i++) {
389 ret = sysdev_register(&pxa27x_sysdev[i]);
391 pr_err("failed to register sysdev[%d]\n", i);
394 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
400 postcore_initcall(pxa27x_init);