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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> | |
fa7499ef G |
16 | #include <linux/amba/bus.h> |
17 | #include <linux/platform_device.h> | |
18 | #include <linux/io.h> | |
19 | #include <linux/cnt32_to_63.h> | |
20 | #include <linux/usb/musb.h> | |
21 | ||
22 | #include <asm/irq.h> | |
23 | #include <mach/hardware.h> | |
24 | #include <mach/pm.h> | |
25 | ||
26 | /* | |
27 | * This is the PKUnity sched_clock implementation. This has | |
28 | * a resolution of 271ns, and a maximum value of 32025597s (370 days). | |
29 | * | |
30 | * The return value is guaranteed to be monotonic in that range as | |
31 | * long as there is always less than 582 seconds between successive | |
32 | * calls to this function. | |
33 | * | |
34 | * ( * 1E9 / CLOCK_TICK_RATE ) -> about 2235/32 | |
35 | */ | |
36 | unsigned long long sched_clock(void) | |
37 | { | |
e5abf78b | 38 | unsigned long long v = cnt32_to_63(readl(OST_OSCR)); |
fa7499ef G |
39 | |
40 | /* original conservative method, but overflow frequently | |
41 | * v *= NSEC_PER_SEC >> 12; | |
42 | * do_div(v, CLOCK_TICK_RATE >> 12); | |
43 | */ | |
44 | v = ((v & 0x7fffffffffffffffULL) * 2235) >> 5; | |
45 | ||
46 | return v; | |
47 | } | |
48 | ||
49 | static struct resource puv3_usb_resources[] = { | |
50 | /* order is significant! */ | |
51 | { | |
1cf46c42 G |
52 | .start = io_v2p(PKUNITY_USB_BASE), |
53 | .end = io_v2p(PKUNITY_USB_BASE) + 0x3ff, | |
fa7499ef G |
54 | .flags = IORESOURCE_MEM, |
55 | }, { | |
56 | .start = IRQ_USB, | |
57 | .flags = IORESOURCE_IRQ, | |
58 | }, { | |
59 | .start = IRQ_USB, | |
60 | .flags = IORESOURCE_IRQ, | |
61 | }, | |
62 | }; | |
63 | ||
64 | static struct musb_hdrc_config puv3_usb_config[] = { | |
65 | { | |
66 | .num_eps = 16, | |
67 | .multipoint = 1, | |
68 | #ifdef CONFIG_USB_INVENTRA_DMA | |
69 | .dma = 1, | |
70 | .dma_channels = 8, | |
71 | #endif | |
72 | }, | |
73 | }; | |
74 | ||
75 | static struct musb_hdrc_platform_data puv3_usb_plat = { | |
76 | .mode = MUSB_HOST, | |
77 | .min_power = 100, | |
78 | .clock = 0, | |
79 | .config = puv3_usb_config, | |
80 | }; | |
81 | ||
82 | static struct resource puv3_mmc_resources[] = { | |
83 | [0] = { | |
1cf46c42 G |
84 | .start = io_v2p(PKUNITY_SDC_BASE), |
85 | .end = io_v2p(PKUNITY_SDC_BASE) + 0xfff, | |
fa7499ef G |
86 | .flags = IORESOURCE_MEM, |
87 | }, | |
88 | [1] = { | |
89 | .start = IRQ_SDC, | |
90 | .end = IRQ_SDC, | |
91 | .flags = IORESOURCE_IRQ, | |
92 | }, | |
93 | }; | |
94 | ||
ce443ab5 G |
95 | static struct resource puv3_unigfx_resources[] = { |
96 | [0] = { | |
1cf46c42 G |
97 | .start = io_v2p(PKUNITY_UNIGFX_BASE), |
98 | .end = io_v2p(PKUNITY_UNIGFX_BASE) + 0xfff, | |
ce443ab5 G |
99 | .flags = IORESOURCE_MEM, |
100 | }, | |
ce443ab5 G |
101 | }; |
102 | ||
fa7499ef G |
103 | static struct resource puv3_rtc_resources[] = { |
104 | [0] = { | |
1cf46c42 G |
105 | .start = io_v2p(PKUNITY_RTC_BASE), |
106 | .end = io_v2p(PKUNITY_RTC_BASE) + 0xff, | |
fa7499ef G |
107 | .flags = IORESOURCE_MEM, |
108 | }, | |
109 | [1] = { | |
110 | .start = IRQ_RTCAlarm, | |
111 | .end = IRQ_RTCAlarm, | |
112 | .flags = IORESOURCE_IRQ, | |
113 | }, | |
114 | [2] = { | |
115 | .start = IRQ_RTC, | |
116 | .end = IRQ_RTC, | |
117 | .flags = IORESOURCE_IRQ | |
118 | } | |
119 | }; | |
120 | ||
121 | static struct resource puv3_pwm_resources[] = { | |
122 | [0] = { | |
1cf46c42 G |
123 | .start = io_v2p(PKUNITY_OST_BASE) + 0x80, |
124 | .end = io_v2p(PKUNITY_OST_BASE) + 0xff, | |
fa7499ef G |
125 | .flags = IORESOURCE_MEM, |
126 | }, | |
127 | }; | |
128 | ||
129 | static struct resource puv3_uart0_resources[] = { | |
130 | [0] = { | |
1cf46c42 G |
131 | .start = io_v2p(PKUNITY_UART0_BASE), |
132 | .end = io_v2p(PKUNITY_UART0_BASE) + 0xff, | |
fa7499ef G |
133 | .flags = IORESOURCE_MEM, |
134 | }, | |
135 | [1] = { | |
136 | .start = IRQ_UART0, | |
137 | .end = IRQ_UART0, | |
138 | .flags = IORESOURCE_IRQ | |
139 | } | |
140 | }; | |
141 | ||
142 | static struct resource puv3_uart1_resources[] = { | |
143 | [0] = { | |
1cf46c42 G |
144 | .start = io_v2p(PKUNITY_UART1_BASE), |
145 | .end = io_v2p(PKUNITY_UART1_BASE) + 0xff, | |
fa7499ef G |
146 | .flags = IORESOURCE_MEM, |
147 | }, | |
148 | [1] = { | |
149 | .start = IRQ_UART1, | |
150 | .end = IRQ_UART1, | |
151 | .flags = IORESOURCE_IRQ | |
152 | } | |
153 | }; | |
154 | ||
155 | static struct resource puv3_umal_resources[] = { | |
156 | [0] = { | |
1cf46c42 G |
157 | .start = io_v2p(PKUNITY_UMAL_BASE), |
158 | .end = io_v2p(PKUNITY_UMAL_BASE) + 0x1fff, | |
fa7499ef G |
159 | .flags = IORESOURCE_MEM, |
160 | }, | |
161 | [1] = { | |
162 | .start = IRQ_UMAL, | |
163 | .end = IRQ_UMAL, | |
164 | .flags = IORESOURCE_IRQ | |
165 | } | |
166 | }; | |
167 | ||
168 | #ifdef CONFIG_PUV3_PM | |
169 | ||
170 | #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x | |
171 | #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x] | |
172 | ||
173 | /* | |
174 | * List of global PXA peripheral registers to preserve. | |
175 | * More ones like CP and general purpose register values are preserved | |
176 | * with the stack pointer in sleep.S. | |
177 | */ | |
178 | enum { | |
179 | SLEEP_SAVE_PM_PLLDDRCFG, | |
180 | SLEEP_SAVE_COUNT | |
181 | }; | |
182 | ||
183 | ||
184 | static void puv3_cpu_pm_save(unsigned long *sleep_save) | |
185 | { | |
186 | /* SAVE(PM_PLLDDRCFG); */ | |
187 | } | |
188 | ||
189 | static void puv3_cpu_pm_restore(unsigned long *sleep_save) | |
190 | { | |
191 | /* RESTORE(PM_PLLDDRCFG); */ | |
192 | } | |
193 | ||
194 | static int puv3_cpu_pm_prepare(void) | |
195 | { | |
196 | /* set resume return address */ | |
e5abf78b | 197 | writel(virt_to_phys(puv3_cpu_resume), PM_DIVCFG); |
fa7499ef G |
198 | return 0; |
199 | } | |
200 | ||
201 | static void puv3_cpu_pm_enter(suspend_state_t state) | |
202 | { | |
203 | /* Clear reset status */ | |
e5abf78b G |
204 | writel(RESETC_RSSR_HWR | RESETC_RSSR_WDR |
205 | | RESETC_RSSR_SMR | RESETC_RSSR_SWR, RESETC_RSSR); | |
fa7499ef G |
206 | |
207 | switch (state) { | |
208 | /* case PM_SUSPEND_ON: | |
209 | puv3_cpu_idle(); | |
210 | break; */ | |
211 | case PM_SUSPEND_MEM: | |
212 | puv3_cpu_pm_prepare(); | |
213 | puv3_cpu_suspend(PM_PMCR_SFB); | |
214 | break; | |
215 | } | |
216 | } | |
217 | ||
218 | static int puv3_cpu_pm_valid(suspend_state_t state) | |
219 | { | |
220 | return state == PM_SUSPEND_MEM; | |
221 | } | |
222 | ||
223 | static void puv3_cpu_pm_finish(void) | |
224 | { | |
225 | /* ensure not to come back here if it wasn't intended */ | |
226 | /* PSPR = 0; */ | |
227 | } | |
228 | ||
229 | static struct puv3_cpu_pm_fns puv3_cpu_pm_fnss = { | |
230 | .save_count = SLEEP_SAVE_COUNT, | |
231 | .valid = puv3_cpu_pm_valid, | |
232 | .save = puv3_cpu_pm_save, | |
233 | .restore = puv3_cpu_pm_restore, | |
234 | .enter = puv3_cpu_pm_enter, | |
235 | .prepare = puv3_cpu_pm_prepare, | |
236 | .finish = puv3_cpu_pm_finish, | |
237 | }; | |
238 | ||
239 | static void __init puv3_init_pm(void) | |
240 | { | |
241 | puv3_cpu_pm_fns = &puv3_cpu_pm_fnss; | |
242 | } | |
243 | #else | |
244 | static inline void puv3_init_pm(void) {} | |
245 | #endif | |
246 | ||
247 | void puv3_ps2_init(void) | |
248 | { | |
249 | struct clk *bclk32; | |
250 | ||
251 | bclk32 = clk_get(NULL, "BUS32_CLK"); | |
e5abf78b | 252 | writel(clk_get_rate(bclk32) / 200000, PS2_CNT); /* should > 5us */ |
fa7499ef G |
253 | } |
254 | ||
255 | void __init puv3_core_init(void) | |
256 | { | |
257 | puv3_init_pm(); | |
258 | puv3_ps2_init(); | |
259 | ||
260 | platform_device_register_simple("PKUnity-v3-RTC", -1, | |
261 | puv3_rtc_resources, ARRAY_SIZE(puv3_rtc_resources)); | |
262 | platform_device_register_simple("PKUnity-v3-UMAL", -1, | |
263 | puv3_umal_resources, ARRAY_SIZE(puv3_umal_resources)); | |
264 | platform_device_register_simple("PKUnity-v3-MMC", -1, | |
265 | puv3_mmc_resources, ARRAY_SIZE(puv3_mmc_resources)); | |
ce443ab5 G |
266 | platform_device_register_simple("PKUnity-v3-UNIGFX", -1, |
267 | puv3_unigfx_resources, ARRAY_SIZE(puv3_unigfx_resources)); | |
fa7499ef G |
268 | platform_device_register_simple("PKUnity-v3-PWM", -1, |
269 | puv3_pwm_resources, ARRAY_SIZE(puv3_pwm_resources)); | |
270 | platform_device_register_simple("PKUnity-v3-UART", 0, | |
271 | puv3_uart0_resources, ARRAY_SIZE(puv3_uart0_resources)); | |
272 | platform_device_register_simple("PKUnity-v3-UART", 1, | |
273 | puv3_uart1_resources, ARRAY_SIZE(puv3_uart1_resources)); | |
274 | platform_device_register_simple("PKUnity-v3-AC97", -1, NULL, 0); | |
d2168146 | 275 | platform_device_register_resndata(NULL, "musb_hdrc", -1, |
fa7499ef G |
276 | puv3_usb_resources, ARRAY_SIZE(puv3_usb_resources), |
277 | &puv3_usb_plat, sizeof(puv3_usb_plat)); | |
278 | } | |
279 |