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fa7499ef G |
1 | /* |
2 | * linux/arch/unicore32/kernel/puv3-core.c | |
3 | * | |
4 | * Code specific to PKUnity SoC and UniCore ISA | |
5 | * | |
6 | * Maintained by GUAN Xue-tao <gxt@mprc.pku.edu.cn> | |
7 | * Copyright (C) 2001-2010 Guan Xuetao | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/init.h> | |
15 | #include <linux/device.h> | |
16 | #include <linux/sysdev.h> | |
17 | #include <linux/amba/bus.h> | |
18 | #include <linux/platform_device.h> | |
19 | #include <linux/io.h> | |
20 | #include <linux/cnt32_to_63.h> | |
21 | #include <linux/usb/musb.h> | |
22 | ||
23 | #include <asm/irq.h> | |
24 | #include <mach/hardware.h> | |
25 | #include <mach/pm.h> | |
26 | ||
27 | /* | |
28 | * This is the PKUnity sched_clock implementation. This has | |
29 | * a resolution of 271ns, and a maximum value of 32025597s (370 days). | |
30 | * | |
31 | * The return value is guaranteed to be monotonic in that range as | |
32 | * long as there is always less than 582 seconds between successive | |
33 | * calls to this function. | |
34 | * | |
35 | * ( * 1E9 / CLOCK_TICK_RATE ) -> about 2235/32 | |
36 | */ | |
37 | unsigned long long sched_clock(void) | |
38 | { | |
39 | unsigned long long v = cnt32_to_63(OST_OSCR); | |
40 | ||
41 | /* original conservative method, but overflow frequently | |
42 | * v *= NSEC_PER_SEC >> 12; | |
43 | * do_div(v, CLOCK_TICK_RATE >> 12); | |
44 | */ | |
45 | v = ((v & 0x7fffffffffffffffULL) * 2235) >> 5; | |
46 | ||
47 | return v; | |
48 | } | |
49 | ||
50 | static struct resource puv3_usb_resources[] = { | |
51 | /* order is significant! */ | |
52 | { | |
53 | .start = PKUNITY_USB_BASE, | |
54 | .end = PKUNITY_USB_BASE + 0x3ff, | |
55 | .flags = IORESOURCE_MEM, | |
56 | }, { | |
57 | .start = IRQ_USB, | |
58 | .flags = IORESOURCE_IRQ, | |
59 | }, { | |
60 | .start = IRQ_USB, | |
61 | .flags = IORESOURCE_IRQ, | |
62 | }, | |
63 | }; | |
64 | ||
65 | static struct musb_hdrc_config puv3_usb_config[] = { | |
66 | { | |
67 | .num_eps = 16, | |
68 | .multipoint = 1, | |
69 | #ifdef CONFIG_USB_INVENTRA_DMA | |
70 | .dma = 1, | |
71 | .dma_channels = 8, | |
72 | #endif | |
73 | }, | |
74 | }; | |
75 | ||
76 | static struct musb_hdrc_platform_data puv3_usb_plat = { | |
77 | .mode = MUSB_HOST, | |
78 | .min_power = 100, | |
79 | .clock = 0, | |
80 | .config = puv3_usb_config, | |
81 | }; | |
82 | ||
83 | static struct resource puv3_mmc_resources[] = { | |
84 | [0] = { | |
85 | .start = PKUNITY_SDC_BASE, | |
86 | .end = PKUNITY_SDC_BASE + 0xfff, | |
87 | .flags = IORESOURCE_MEM, | |
88 | }, | |
89 | [1] = { | |
90 | .start = IRQ_SDC, | |
91 | .end = IRQ_SDC, | |
92 | .flags = IORESOURCE_IRQ, | |
93 | }, | |
94 | }; | |
95 | ||
96 | static struct resource puv3_rtc_resources[] = { | |
97 | [0] = { | |
98 | .start = PKUNITY_RTC_BASE, | |
99 | .end = PKUNITY_RTC_BASE + 0xff, | |
100 | .flags = IORESOURCE_MEM, | |
101 | }, | |
102 | [1] = { | |
103 | .start = IRQ_RTCAlarm, | |
104 | .end = IRQ_RTCAlarm, | |
105 | .flags = IORESOURCE_IRQ, | |
106 | }, | |
107 | [2] = { | |
108 | .start = IRQ_RTC, | |
109 | .end = IRQ_RTC, | |
110 | .flags = IORESOURCE_IRQ | |
111 | } | |
112 | }; | |
113 | ||
114 | static struct resource puv3_pwm_resources[] = { | |
115 | [0] = { | |
116 | .start = PKUNITY_OST_BASE + 0x80, | |
117 | .end = PKUNITY_OST_BASE + 0xff, | |
118 | .flags = IORESOURCE_MEM, | |
119 | }, | |
120 | }; | |
121 | ||
122 | static struct resource puv3_uart0_resources[] = { | |
123 | [0] = { | |
124 | .start = PKUNITY_UART0_BASE, | |
125 | .end = PKUNITY_UART0_BASE + 0xff, | |
126 | .flags = IORESOURCE_MEM, | |
127 | }, | |
128 | [1] = { | |
129 | .start = IRQ_UART0, | |
130 | .end = IRQ_UART0, | |
131 | .flags = IORESOURCE_IRQ | |
132 | } | |
133 | }; | |
134 | ||
135 | static struct resource puv3_uart1_resources[] = { | |
136 | [0] = { | |
137 | .start = PKUNITY_UART1_BASE, | |
138 | .end = PKUNITY_UART1_BASE + 0xff, | |
139 | .flags = IORESOURCE_MEM, | |
140 | }, | |
141 | [1] = { | |
142 | .start = IRQ_UART1, | |
143 | .end = IRQ_UART1, | |
144 | .flags = IORESOURCE_IRQ | |
145 | } | |
146 | }; | |
147 | ||
148 | static struct resource puv3_umal_resources[] = { | |
149 | [0] = { | |
150 | .start = PKUNITY_UMAL_BASE, | |
151 | .end = PKUNITY_UMAL_BASE + 0x1fff, | |
152 | .flags = IORESOURCE_MEM, | |
153 | }, | |
154 | [1] = { | |
155 | .start = IRQ_UMAL, | |
156 | .end = IRQ_UMAL, | |
157 | .flags = IORESOURCE_IRQ | |
158 | } | |
159 | }; | |
160 | ||
161 | #ifdef CONFIG_PUV3_PM | |
162 | ||
163 | #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x | |
164 | #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x] | |
165 | ||
166 | /* | |
167 | * List of global PXA peripheral registers to preserve. | |
168 | * More ones like CP and general purpose register values are preserved | |
169 | * with the stack pointer in sleep.S. | |
170 | */ | |
171 | enum { | |
172 | SLEEP_SAVE_PM_PLLDDRCFG, | |
173 | SLEEP_SAVE_COUNT | |
174 | }; | |
175 | ||
176 | ||
177 | static void puv3_cpu_pm_save(unsigned long *sleep_save) | |
178 | { | |
179 | /* SAVE(PM_PLLDDRCFG); */ | |
180 | } | |
181 | ||
182 | static void puv3_cpu_pm_restore(unsigned long *sleep_save) | |
183 | { | |
184 | /* RESTORE(PM_PLLDDRCFG); */ | |
185 | } | |
186 | ||
187 | static int puv3_cpu_pm_prepare(void) | |
188 | { | |
189 | /* set resume return address */ | |
190 | PM_DIVCFG = virt_to_phys(puv3_cpu_resume); | |
191 | return 0; | |
192 | } | |
193 | ||
194 | static void puv3_cpu_pm_enter(suspend_state_t state) | |
195 | { | |
196 | /* Clear reset status */ | |
197 | RESETC_RSSR = RESETC_RSSR_HWR | RESETC_RSSR_WDR | |
198 | | RESETC_RSSR_SMR | RESETC_RSSR_SWR; | |
199 | ||
200 | switch (state) { | |
201 | /* case PM_SUSPEND_ON: | |
202 | puv3_cpu_idle(); | |
203 | break; */ | |
204 | case PM_SUSPEND_MEM: | |
205 | puv3_cpu_pm_prepare(); | |
206 | puv3_cpu_suspend(PM_PMCR_SFB); | |
207 | break; | |
208 | } | |
209 | } | |
210 | ||
211 | static int puv3_cpu_pm_valid(suspend_state_t state) | |
212 | { | |
213 | return state == PM_SUSPEND_MEM; | |
214 | } | |
215 | ||
216 | static void puv3_cpu_pm_finish(void) | |
217 | { | |
218 | /* ensure not to come back here if it wasn't intended */ | |
219 | /* PSPR = 0; */ | |
220 | } | |
221 | ||
222 | static struct puv3_cpu_pm_fns puv3_cpu_pm_fnss = { | |
223 | .save_count = SLEEP_SAVE_COUNT, | |
224 | .valid = puv3_cpu_pm_valid, | |
225 | .save = puv3_cpu_pm_save, | |
226 | .restore = puv3_cpu_pm_restore, | |
227 | .enter = puv3_cpu_pm_enter, | |
228 | .prepare = puv3_cpu_pm_prepare, | |
229 | .finish = puv3_cpu_pm_finish, | |
230 | }; | |
231 | ||
232 | static void __init puv3_init_pm(void) | |
233 | { | |
234 | puv3_cpu_pm_fns = &puv3_cpu_pm_fnss; | |
235 | } | |
236 | #else | |
237 | static inline void puv3_init_pm(void) {} | |
238 | #endif | |
239 | ||
240 | void puv3_ps2_init(void) | |
241 | { | |
242 | struct clk *bclk32; | |
243 | ||
244 | bclk32 = clk_get(NULL, "BUS32_CLK"); | |
245 | PS2_CNT = clk_get_rate(bclk32) / 200000; /* should > 5us */ | |
246 | } | |
247 | ||
248 | void __init puv3_core_init(void) | |
249 | { | |
250 | puv3_init_pm(); | |
251 | puv3_ps2_init(); | |
252 | ||
253 | platform_device_register_simple("PKUnity-v3-RTC", -1, | |
254 | puv3_rtc_resources, ARRAY_SIZE(puv3_rtc_resources)); | |
255 | platform_device_register_simple("PKUnity-v3-UMAL", -1, | |
256 | puv3_umal_resources, ARRAY_SIZE(puv3_umal_resources)); | |
257 | platform_device_register_simple("PKUnity-v3-MMC", -1, | |
258 | puv3_mmc_resources, ARRAY_SIZE(puv3_mmc_resources)); | |
259 | platform_device_register_simple("PKUnity-v3-PWM", -1, | |
260 | puv3_pwm_resources, ARRAY_SIZE(puv3_pwm_resources)); | |
261 | platform_device_register_simple("PKUnity-v3-UART", 0, | |
262 | puv3_uart0_resources, ARRAY_SIZE(puv3_uart0_resources)); | |
263 | platform_device_register_simple("PKUnity-v3-UART", 1, | |
264 | puv3_uart1_resources, ARRAY_SIZE(puv3_uart1_resources)); | |
265 | platform_device_register_simple("PKUnity-v3-AC97", -1, NULL, 0); | |
266 | platform_device_register_resndata(&platform_bus, "musb_hdrc", -1, | |
267 | puv3_usb_resources, ARRAY_SIZE(puv3_usb_resources), | |
268 | &puv3_usb_plat, sizeof(puv3_usb_plat)); | |
269 | } | |
270 |