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1 | /* linux/arch/arm/mach-s3c2410/s3c2410.c |
2 | * | |
3 | * Copyright (c) 2003-2005 Simtec Electronics | |
4 | * Ben Dooks <ben@simtec.co.uk> | |
5 | * | |
6 | * http://www.simtec.co.uk/products/EB2410ITX/ | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * Modifications: | |
13 | * 16-May-2003 BJD Created initial version | |
14 | * 16-Aug-2003 BJD Fixed header files and copyright, added URL | |
15 | * 05-Sep-2003 BJD Moved to kernel v2.6 | |
16 | * 18-Jan-2004 BJD Added serial port configuration | |
17 | * 21-Aug-2004 BJD Added new struct s3c2410_board handler | |
18 | * 28-Sep-2004 BJD Updates for new serial port bits | |
19 | * 04-Nov-2004 BJD Updated UART configuration process | |
20 | * 10-Jan-2005 BJD Removed s3c2410_clock_tick_rate | |
21 | */ | |
22 | ||
23 | #include <linux/kernel.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/list.h> | |
27 | #include <linux/timer.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/device.h> | |
30 | ||
31 | #include <asm/mach/arch.h> | |
32 | #include <asm/mach/map.h> | |
33 | #include <asm/mach/irq.h> | |
34 | ||
35 | #include <asm/hardware.h> | |
36 | #include <asm/io.h> | |
37 | #include <asm/irq.h> | |
38 | ||
39 | #include <asm/arch/regs-clock.h> | |
40 | #include <asm/arch/regs-serial.h> | |
41 | ||
42 | #include "s3c2410.h" | |
43 | #include "cpu.h" | |
44 | #include "clock.h" | |
45 | ||
46 | /* Initial IO mappings */ | |
47 | ||
48 | static struct map_desc s3c2410_iodesc[] __initdata = { | |
49 | IODESC_ENT(USBHOST), | |
50 | IODESC_ENT(CLKPWR), | |
51 | IODESC_ENT(LCD), | |
52 | IODESC_ENT(UART), | |
53 | IODESC_ENT(TIMER), | |
54 | IODESC_ENT(ADC), | |
55 | IODESC_ENT(WATCHDOG) | |
56 | }; | |
57 | ||
58 | static struct resource s3c_uart0_resource[] = { | |
59 | [0] = { | |
60 | .start = S3C2410_PA_UART0, | |
61 | .end = S3C2410_PA_UART0 + 0x3fff, | |
62 | .flags = IORESOURCE_MEM, | |
63 | }, | |
64 | [1] = { | |
65 | .start = IRQ_S3CUART_RX0, | |
66 | .end = IRQ_S3CUART_ERR0, | |
67 | .flags = IORESOURCE_IRQ, | |
68 | } | |
69 | ||
70 | }; | |
71 | ||
72 | static struct resource s3c_uart1_resource[] = { | |
73 | [0] = { | |
74 | .start = S3C2410_PA_UART1, | |
75 | .end = S3C2410_PA_UART1 + 0x3fff, | |
76 | .flags = IORESOURCE_MEM, | |
77 | }, | |
78 | [1] = { | |
79 | .start = IRQ_S3CUART_RX1, | |
80 | .end = IRQ_S3CUART_ERR1, | |
81 | .flags = IORESOURCE_IRQ, | |
82 | } | |
83 | }; | |
84 | ||
85 | static struct resource s3c_uart2_resource[] = { | |
86 | [0] = { | |
87 | .start = S3C2410_PA_UART2, | |
88 | .end = S3C2410_PA_UART2 + 0x3fff, | |
89 | .flags = IORESOURCE_MEM, | |
90 | }, | |
91 | [1] = { | |
92 | .start = IRQ_S3CUART_RX2, | |
93 | .end = IRQ_S3CUART_ERR2, | |
94 | .flags = IORESOURCE_IRQ, | |
95 | } | |
96 | }; | |
97 | ||
98 | /* our uart devices */ | |
99 | ||
100 | static struct platform_device s3c_uart0 = { | |
101 | .name = "s3c2410-uart", | |
102 | .id = 0, | |
103 | .num_resources = ARRAY_SIZE(s3c_uart0_resource), | |
104 | .resource = s3c_uart0_resource, | |
105 | }; | |
106 | ||
107 | ||
108 | static struct platform_device s3c_uart1 = { | |
109 | .name = "s3c2410-uart", | |
110 | .id = 1, | |
111 | .num_resources = ARRAY_SIZE(s3c_uart1_resource), | |
112 | .resource = s3c_uart1_resource, | |
113 | }; | |
114 | ||
115 | static struct platform_device s3c_uart2 = { | |
116 | .name = "s3c2410-uart", | |
117 | .id = 2, | |
118 | .num_resources = ARRAY_SIZE(s3c_uart2_resource), | |
119 | .resource = s3c_uart2_resource, | |
120 | }; | |
121 | ||
122 | static struct platform_device *uart_devices[] __initdata = { | |
123 | &s3c_uart0, | |
124 | &s3c_uart1, | |
125 | &s3c_uart2 | |
126 | }; | |
127 | ||
128 | /* store our uart devices for the serial driver console */ | |
129 | struct platform_device *s3c2410_uart_devices[3]; | |
130 | ||
131 | static int s3c2410_uart_count = 0; | |
132 | ||
133 | /* uart registration process */ | |
134 | ||
135 | void __init s3c2410_init_uarts(struct s3c2410_uartcfg *cfg, int no) | |
136 | { | |
137 | struct platform_device *platdev; | |
138 | int uart; | |
139 | ||
140 | for (uart = 0; uart < no; uart++, cfg++) { | |
141 | platdev = uart_devices[cfg->hwport]; | |
142 | ||
143 | s3c24xx_uart_devs[uart] = platdev; | |
144 | platdev->dev.platform_data = cfg; | |
145 | } | |
146 | ||
147 | s3c2410_uart_count = uart; | |
148 | } | |
149 | ||
150 | /* s3c2410_map_io | |
151 | * | |
152 | * register the standard cpu IO areas, and any passed in from the | |
153 | * machine specific initialisation. | |
154 | */ | |
155 | ||
156 | void __init s3c2410_map_io(struct map_desc *mach_desc, int mach_size) | |
157 | { | |
158 | /* register our io-tables */ | |
159 | ||
160 | iotable_init(s3c2410_iodesc, ARRAY_SIZE(s3c2410_iodesc)); | |
161 | iotable_init(mach_desc, mach_size); | |
162 | } | |
163 | ||
164 | void __init s3c2410_init_clocks(int xtal) | |
165 | { | |
166 | unsigned long tmp; | |
167 | unsigned long fclk; | |
168 | unsigned long hclk; | |
169 | unsigned long pclk; | |
170 | ||
171 | /* now we've got our machine bits initialised, work out what | |
172 | * clocks we've got */ | |
173 | ||
174 | fclk = s3c2410_get_pll(__raw_readl(S3C2410_MPLLCON), xtal); | |
175 | ||
176 | tmp = __raw_readl(S3C2410_CLKDIVN); | |
177 | ||
178 | /* work out clock scalings */ | |
179 | ||
180 | hclk = fclk / ((tmp & S3C2410_CLKDIVN_HDIVN) ? 2 : 1); | |
181 | pclk = hclk / ((tmp & S3C2410_CLKDIVN_PDIVN) ? 2 : 1); | |
182 | ||
183 | /* print brieft summary of clocks, etc */ | |
184 | ||
185 | printk("S3C2410: core %ld.%03ld MHz, memory %ld.%03ld MHz, peripheral %ld.%03ld MHz\n", | |
186 | print_mhz(fclk), print_mhz(hclk), print_mhz(pclk)); | |
187 | ||
188 | /* initialise the clocks here, to allow other things like the | |
189 | * console to use them | |
190 | */ | |
191 | ||
192 | s3c24xx_setup_clocks(xtal, fclk, hclk, pclk); | |
193 | } | |
194 | ||
195 | int __init s3c2410_init(void) | |
196 | { | |
197 | printk("S3C2410: Initialising architecture\n"); | |
198 | ||
199 | return platform_add_devices(s3c24xx_uart_devs, s3c2410_uart_count); | |
200 | } |