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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm/mach-pxa/pxa27x.c | |
3 | * | |
4 | * Author: Nicolas Pitre | |
5 | * Created: Nov 05, 2002 | |
6 | * Copyright: MontaVista Software Inc. | |
7 | * | |
8 | * Code specific to PXA27x aka Bulverde. | |
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 | */ | |
1da177e4 LT |
14 | #include <linux/module.h> |
15 | #include <linux/kernel.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/pm.h> | |
d052d1be | 18 | #include <linux/platform_device.h> |
1da177e4 LT |
19 | |
20 | #include <asm/hardware.h> | |
21 | #include <asm/irq.h> | |
cd49104d | 22 | #include <asm/arch/irqs.h> |
1da177e4 | 23 | #include <asm/arch/pxa-regs.h> |
81f280e2 | 24 | #include <asm/arch/ohci.h> |
e176bb05 | 25 | #include <asm/arch/pm.h> |
f53f066c | 26 | #include <asm/arch/dma.h> |
1da177e4 LT |
27 | |
28 | #include "generic.h" | |
46c41e62 | 29 | #include "devices.h" |
1da177e4 LT |
30 | |
31 | /* Crystal clock: 13MHz */ | |
32 | #define BASE_CLK 13000000 | |
33 | ||
34 | /* | |
35 | * Get the clock frequency as reflected by CCSR and the turbo flag. | |
36 | * We assume these values have been applied via a fcs. | |
37 | * If info is not 0 we also display the current settings. | |
38 | */ | |
39 | unsigned int get_clk_frequency_khz( int info) | |
40 | { | |
41 | unsigned long ccsr, clkcfg; | |
42 | unsigned int l, L, m, M, n2, N, S; | |
43 | int cccr_a, t, ht, b; | |
44 | ||
45 | ccsr = CCSR; | |
46 | cccr_a = CCCR & (1 << 25); | |
47 | ||
48 | /* Read clkcfg register: it has turbo, b, half-turbo (and f) */ | |
49 | asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) ); | |
afe5df20 | 50 | t = clkcfg & (1 << 0); |
1da177e4 LT |
51 | ht = clkcfg & (1 << 2); |
52 | b = clkcfg & (1 << 3); | |
53 | ||
54 | l = ccsr & 0x1f; | |
55 | n2 = (ccsr>>7) & 0xf; | |
56 | m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4; | |
57 | ||
58 | L = l * BASE_CLK; | |
59 | N = (L * n2) / 2; | |
60 | M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2)); | |
61 | S = (b) ? L : (L/2); | |
62 | ||
63 | if (info) { | |
64 | printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n", | |
65 | L / 1000000, (L % 1000000) / 10000, l ); | |
66 | printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n", | |
67 | N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5, | |
68 | (t) ? "" : "in" ); | |
69 | printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n", | |
70 | M / 1000000, (M % 1000000) / 10000, m ); | |
71 | printk( KERN_INFO "System bus clock: %d.%02dMHz \n", | |
72 | S / 1000000, (S % 1000000) / 10000 ); | |
73 | } | |
74 | ||
75 | return (t) ? (N/1000) : (L/1000); | |
76 | } | |
77 | ||
78 | /* | |
79 | * Return the current mem clock frequency in units of 10kHz as | |
80 | * reflected by CCCR[A], B, and L | |
81 | */ | |
82 | unsigned int get_memclk_frequency_10khz(void) | |
83 | { | |
84 | unsigned long ccsr, clkcfg; | |
85 | unsigned int l, L, m, M; | |
86 | int cccr_a, b; | |
87 | ||
88 | ccsr = CCSR; | |
89 | cccr_a = CCCR & (1 << 25); | |
90 | ||
91 | /* Read clkcfg register: it has turbo, b, half-turbo (and f) */ | |
92 | asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) ); | |
93 | b = clkcfg & (1 << 3); | |
94 | ||
95 | l = ccsr & 0x1f; | |
96 | m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4; | |
97 | ||
98 | L = l * BASE_CLK; | |
99 | M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2)); | |
100 | ||
101 | return (M / 10000); | |
102 | } | |
103 | ||
104 | /* | |
105 | * Return the current LCD clock frequency in units of 10kHz as | |
106 | */ | |
107 | unsigned int get_lcdclk_frequency_10khz(void) | |
108 | { | |
109 | unsigned long ccsr; | |
110 | unsigned int l, L, k, K; | |
111 | ||
112 | ccsr = CCSR; | |
113 | ||
114 | l = ccsr & 0x1f; | |
115 | k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4; | |
116 | ||
117 | L = l * BASE_CLK; | |
118 | K = L / k; | |
119 | ||
120 | return (K / 10000); | |
121 | } | |
122 | ||
123 | EXPORT_SYMBOL(get_clk_frequency_khz); | |
124 | EXPORT_SYMBOL(get_memclk_frequency_10khz); | |
125 | EXPORT_SYMBOL(get_lcdclk_frequency_10khz); | |
126 | ||
a8fa3f0c NP |
127 | #ifdef CONFIG_PM |
128 | ||
8775420d TP |
129 | void pxa_cpu_pm_enter(suspend_state_t state) |
130 | { | |
131 | extern void pxa_cpu_standby(void); | |
132 | extern void pxa_cpu_suspend(unsigned int); | |
133 | extern void pxa_cpu_resume(void); | |
134 | ||
26705ca4 | 135 | if (state == PM_SUSPEND_STANDBY) |
1f750a78 | 136 | CKEN = (1 << CKEN_MEMC) | (1 << CKEN_OSTIMER) | (1 << CKEN_LCD) | (1 << CKEN_PWM0); |
26705ca4 | 137 | else |
1f750a78 | 138 | CKEN = (1 << CKEN_MEMC) | (1 << CKEN_OSTIMER); |
8775420d TP |
139 | |
140 | /* ensure voltage-change sequencer not initiated, which hangs */ | |
141 | PCFR &= ~PCFR_FVC; | |
142 | ||
143 | /* Clear edge-detect status register. */ | |
144 | PEDR = 0xDF12FE1B; | |
145 | ||
146 | switch (state) { | |
26705ca4 TP |
147 | case PM_SUSPEND_STANDBY: |
148 | pxa_cpu_standby(); | |
149 | break; | |
8775420d TP |
150 | case PM_SUSPEND_MEM: |
151 | /* set resume return address */ | |
152 | PSPR = virt_to_phys(pxa_cpu_resume); | |
80a18573 | 153 | pxa_cpu_suspend(PWRMODE_SLEEP); |
8775420d TP |
154 | break; |
155 | } | |
156 | } | |
1da177e4 | 157 | |
88dfe98c RK |
158 | static int pxa27x_pm_valid(suspend_state_t state) |
159 | { | |
160 | return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY; | |
161 | } | |
162 | ||
e176bb05 | 163 | static struct pm_ops pxa27x_pm_ops = { |
e176bb05 | 164 | .enter = pxa_pm_enter, |
88dfe98c | 165 | .valid = pxa27x_pm_valid, |
e176bb05 | 166 | }; |
a8fa3f0c NP |
167 | #endif |
168 | ||
1da177e4 LT |
169 | /* |
170 | * device registration specific to PXA27x. | |
171 | */ | |
172 | ||
173 | static u64 pxa27x_dmamask = 0xffffffffUL; | |
174 | ||
175 | static struct resource pxa27x_ohci_resources[] = { | |
176 | [0] = { | |
177 | .start = 0x4C000000, | |
178 | .end = 0x4C00ff6f, | |
179 | .flags = IORESOURCE_MEM, | |
180 | }, | |
181 | [1] = { | |
182 | .start = IRQ_USBH1, | |
183 | .end = IRQ_USBH1, | |
184 | .flags = IORESOURCE_IRQ, | |
185 | }, | |
186 | }; | |
187 | ||
34f3231f | 188 | static struct platform_device pxaohci_device = { |
1da177e4 LT |
189 | .name = "pxa27x-ohci", |
190 | .id = -1, | |
191 | .dev = { | |
192 | .dma_mask = &pxa27x_dmamask, | |
193 | .coherent_dma_mask = 0xffffffff, | |
194 | }, | |
195 | .num_resources = ARRAY_SIZE(pxa27x_ohci_resources), | |
196 | .resource = pxa27x_ohci_resources, | |
197 | }; | |
198 | ||
81f280e2 RP |
199 | void __init pxa_set_ohci_info(struct pxaohci_platform_data *info) |
200 | { | |
34f3231f | 201 | pxaohci_device.dev.platform_data = info; |
81f280e2 RP |
202 | } |
203 | ||
34f3231f RK |
204 | static struct resource i2c_power_resources[] = { |
205 | { | |
206 | .start = 0x40f00180, | |
207 | .end = 0x40f001a3, | |
208 | .flags = IORESOURCE_MEM, | |
209 | }, { | |
210 | .start = IRQ_PWRI2C, | |
211 | .end = IRQ_PWRI2C, | |
212 | .flags = IORESOURCE_IRQ, | |
213 | }, | |
214 | }; | |
215 | ||
216 | static struct platform_device pxai2c_power_device = { | |
217 | .name = "pxa2xx-i2c", | |
218 | .id = 1, | |
219 | .resource = i2c_power_resources, | |
220 | .num_resources = ARRAY_SIZE(i2c_power_resources), | |
221 | }; | |
222 | ||
1da177e4 | 223 | static struct platform_device *devices[] __initdata = { |
34f3231f RK |
224 | &pxamci_device, |
225 | &pxaudc_device, | |
226 | &pxafb_device, | |
227 | &ffuart_device, | |
228 | &btuart_device, | |
229 | &stuart_device, | |
230 | &pxai2c_device, | |
231 | &pxai2c_power_device, | |
232 | &pxai2s_device, | |
233 | &pxaficp_device, | |
234 | &pxartc_device, | |
235 | &pxaohci_device, | |
1da177e4 LT |
236 | }; |
237 | ||
cd49104d EM |
238 | void __init pxa27x_init_irq(void) |
239 | { | |
240 | pxa_init_irq_low(); | |
241 | pxa_init_irq_high(); | |
242 | pxa_init_irq_gpio(128); | |
243 | } | |
244 | ||
1da177e4 LT |
245 | static int __init pxa27x_init(void) |
246 | { | |
e176bb05 RK |
247 | int ret = 0; |
248 | if (cpu_is_pxa27x()) { | |
f53f066c EM |
249 | if ((ret = pxa_init_dma(32))) |
250 | return ret; | |
e176bb05 RK |
251 | #ifdef CONFIG_PM |
252 | pm_set_ops(&pxa27x_pm_ops); | |
253 | #endif | |
254 | ret = platform_add_devices(devices, ARRAY_SIZE(devices)); | |
255 | } | |
256 | return ret; | |
1da177e4 LT |
257 | } |
258 | ||
259 | subsys_initcall(pxa27x_init); |