ARM: Consolidate clks_register() and similar
[linux-2.6.git] / arch / arm / mach-w90x900 / cpu.c
1 /*
2  * linux/arch/arm/mach-w90x900/cpu.c
3  *
4  * Copyright (c) 2009 Nuvoton corporation.
5  *
6  * Wan ZongShun <mcuos.com@gmail.com>
7  *
8  * NUC900 series cpu common support
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 as published by
12  * the Free Software Foundation;version 2 of the License.
13  *
14  */
15
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/interrupt.h>
19 #include <linux/list.h>
20 #include <linux/timer.h>
21 #include <linux/init.h>
22 #include <linux/platform_device.h>
23 #include <linux/io.h>
24 #include <linux/serial_8250.h>
25 #include <linux/delay.h>
26
27 #include <asm/mach/arch.h>
28 #include <asm/mach/map.h>
29 #include <asm/mach/irq.h>
30 #include <asm/irq.h>
31
32 #include <mach/hardware.h>
33 #include <mach/regs-serial.h>
34 #include <mach/regs-clock.h>
35 #include <mach/regs-ebi.h>
36
37 #include "cpu.h"
38 #include "clock.h"
39
40 /* Initial IO mappings */
41
42 static struct map_desc nuc900_iodesc[] __initdata = {
43         IODESC_ENT(IRQ),
44         IODESC_ENT(GCR),
45         IODESC_ENT(UART),
46         IODESC_ENT(TIMER),
47         IODESC_ENT(EBI),
48 };
49
50 /* Initial clock declarations. */
51 static DEFINE_CLK(lcd, 0);
52 static DEFINE_CLK(audio, 1);
53 static DEFINE_CLK(fmi, 4);
54 static DEFINE_SUBCLK(ms, 0);
55 static DEFINE_SUBCLK(sd, 1);
56 static DEFINE_CLK(dmac, 5);
57 static DEFINE_CLK(atapi, 6);
58 static DEFINE_CLK(emc, 7);
59 static DEFINE_SUBCLK(rmii, 2);
60 static DEFINE_CLK(usbd, 8);
61 static DEFINE_CLK(usbh, 9);
62 static DEFINE_CLK(g2d, 10);;
63 static DEFINE_CLK(pwm, 18);
64 static DEFINE_CLK(ps2, 24);
65 static DEFINE_CLK(kpi, 25);
66 static DEFINE_CLK(wdt, 26);
67 static DEFINE_CLK(gdma, 27);
68 static DEFINE_CLK(adc, 28);
69 static DEFINE_CLK(usi, 29);
70 static DEFINE_CLK(ext, 0);
71
72 static struct clk_lookup nuc900_clkregs[] = {
73         DEF_CLKLOOK(&clk_lcd, "nuc900-lcd", NULL),
74         DEF_CLKLOOK(&clk_audio, "nuc900-audio", NULL),
75         DEF_CLKLOOK(&clk_fmi, "nuc900-fmi", NULL),
76         DEF_CLKLOOK(&clk_ms, "nuc900-fmi", "MS"),
77         DEF_CLKLOOK(&clk_sd, "nuc900-fmi", "SD"),
78         DEF_CLKLOOK(&clk_dmac, "nuc900-dmac", NULL),
79         DEF_CLKLOOK(&clk_atapi, "nuc900-atapi", NULL),
80         DEF_CLKLOOK(&clk_emc, "nuc900-emc", NULL),
81         DEF_CLKLOOK(&clk_rmii, "nuc900-emc", "RMII"),
82         DEF_CLKLOOK(&clk_usbd, "nuc900-usbd", NULL),
83         DEF_CLKLOOK(&clk_usbh, "nuc900-usbh", NULL),
84         DEF_CLKLOOK(&clk_g2d, "nuc900-g2d", NULL),
85         DEF_CLKLOOK(&clk_pwm, "nuc900-pwm", NULL),
86         DEF_CLKLOOK(&clk_ps2, "nuc900-ps2", NULL),
87         DEF_CLKLOOK(&clk_kpi, "nuc900-kpi", NULL),
88         DEF_CLKLOOK(&clk_wdt, "nuc900-wdt", NULL),
89         DEF_CLKLOOK(&clk_gdma, "nuc900-gdma", NULL),
90         DEF_CLKLOOK(&clk_adc, "nuc900-adc", NULL),
91         DEF_CLKLOOK(&clk_usi, "nuc900-spi", NULL),
92         DEF_CLKLOOK(&clk_ext, NULL, "ext"),
93 };
94
95 /* Initial serial platform data */
96
97 struct plat_serial8250_port nuc900_uart_data[] = {
98         NUC900_8250PORT(UART0),
99         {},
100 };
101
102 struct platform_device nuc900_serial_device = {
103         .name                   = "serial8250",
104         .id                     = PLAT8250_DEV_PLATFORM,
105         .dev                    = {
106                 .platform_data  = nuc900_uart_data,
107         },
108 };
109
110 /*Set NUC900 series cpu frequence*/
111 static int __init nuc900_set_clkval(unsigned int cpufreq)
112 {
113         unsigned int pllclk, ahbclk, apbclk, val;
114
115         pllclk = 0;
116         ahbclk = 0;
117         apbclk = 0;
118
119         switch (cpufreq) {
120         case 66:
121                 pllclk = PLL_66MHZ;
122                 ahbclk = AHB_CPUCLK_1_1;
123                 apbclk = APB_AHB_1_2;
124                 break;
125
126         case 100:
127                 pllclk = PLL_100MHZ;
128                 ahbclk = AHB_CPUCLK_1_1;
129                 apbclk = APB_AHB_1_2;
130                 break;
131
132         case 120:
133                 pllclk = PLL_120MHZ;
134                 ahbclk = AHB_CPUCLK_1_2;
135                 apbclk = APB_AHB_1_2;
136                 break;
137
138         case 166:
139                 pllclk = PLL_166MHZ;
140                 ahbclk = AHB_CPUCLK_1_2;
141                 apbclk = APB_AHB_1_2;
142                 break;
143
144         case 200:
145                 pllclk = PLL_200MHZ;
146                 ahbclk = AHB_CPUCLK_1_2;
147                 apbclk = APB_AHB_1_2;
148                 break;
149         }
150
151         __raw_writel(pllclk, REG_PLLCON0);
152
153         val = __raw_readl(REG_CLKDIV);
154         val &= ~(0x03 << 24 | 0x03 << 26);
155         val |= (ahbclk << 24 | apbclk << 26);
156         __raw_writel(val, REG_CLKDIV);
157
158         return  0;
159 }
160 static int __init nuc900_set_cpufreq(char *str)
161 {
162         unsigned long cpufreq, val;
163
164         if (!*str)
165                 return 0;
166
167         strict_strtoul(str, 0, &cpufreq);
168
169         nuc900_clock_source(NULL, "ext");
170
171         nuc900_set_clkval(cpufreq);
172
173         mdelay(1);
174
175         val = __raw_readl(REG_CKSKEW);
176         val &= ~0xff;
177         val |= DEFAULTSKEW;
178         __raw_writel(val, REG_CKSKEW);
179
180         nuc900_clock_source(NULL, "pll0");
181
182         return 1;
183 }
184
185 __setup("cpufreq=", nuc900_set_cpufreq);
186
187 /*Init NUC900 evb io*/
188
189 void __init nuc900_map_io(struct map_desc *mach_desc, int mach_size)
190 {
191         unsigned long idcode = 0x0;
192
193         iotable_init(mach_desc, mach_size);
194         iotable_init(nuc900_iodesc, ARRAY_SIZE(nuc900_iodesc));
195
196         idcode = __raw_readl(NUC900PDID);
197         if (idcode == NUC910_CPUID)
198                 printk(KERN_INFO "CPU type 0x%08lx is NUC910\n", idcode);
199         else if (idcode == NUC920_CPUID)
200                 printk(KERN_INFO "CPU type 0x%08lx is NUC920\n", idcode);
201         else if (idcode == NUC950_CPUID)
202                 printk(KERN_INFO "CPU type 0x%08lx is NUC950\n", idcode);
203         else if (idcode == NUC960_CPUID)
204                 printk(KERN_INFO "CPU type 0x%08lx is NUC960\n", idcode);
205 }
206
207 /*Init NUC900 clock*/
208
209 void __init nuc900_init_clocks(void)
210 {
211         clkdev_add_table(nuc900_clkregs, ARRAY_SIZE(nuc900_clkregs));
212 }
213