2 * Atheros AR71xx SoC specific setup
4 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
5 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
7 * Parts of this file are based on Atheros' 2.6.15 BSP
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published
11 * by the Free Software Foundation.
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/init.h>
17 #include <linux/types.h>
18 #include <linux/pci.h>
19 #include <linux/serial_8250.h>
20 #include <linux/bootmem.h>
22 #include <asm/bootinfo.h>
23 #include <asm/traps.h>
24 #include <asm/time.h> /* for mips_hpt_frequency */
25 #include <asm/reboot.h> /* for _machine_{restart,halt} */
26 #include <asm/mips_machine.h>
28 #include <asm/mach-ar71xx/ar71xx.h>
29 #include <asm/mach-ar71xx/pci.h>
33 #define AR71XX_SYS_TYPE_LEN 64
34 #define AR71XX_BASE_FREQ 40000000
35 #define AR91XX_BASE_FREQ 5000000
36 #define AR724X_BASE_FREQ 5000000
38 enum ar71xx_mach_type ar71xx_mach;
41 EXPORT_SYMBOL_GPL(ar71xx_cpu_freq);
44 EXPORT_SYMBOL_GPL(ar71xx_ahb_freq);
47 EXPORT_SYMBOL_GPL(ar71xx_ddr_freq);
49 enum ar71xx_soc_type ar71xx_soc;
50 EXPORT_SYMBOL_GPL(ar71xx_soc);
52 int (*ar71xx_pci_bios_init)(unsigned nr_irqs,
53 struct ar71xx_pci_irq *map) __initdata;
55 int (*ar71xx_pci_be_handler)(int is_fixup);
57 static char ar71xx_sys_type[AR71XX_SYS_TYPE_LEN];
59 static void ar71xx_restart(char *command)
61 ar71xx_device_stop(RESET_MODULE_FULL_CHIP);
67 static void ar71xx_halt(void)
73 static int ar71xx_be_handler(struct pt_regs *regs, int is_fixup)
77 if (ar71xx_pci_be_handler)
78 err = ar71xx_pci_be_handler(is_fixup);
80 return (is_fixup && !err) ? MIPS_BE_FIXUP : MIPS_BE_FATAL;
83 int __init ar71xx_pci_init(unsigned nr_irqs, struct ar71xx_pci_irq *map)
85 if (!ar71xx_pci_bios_init)
88 return ar71xx_pci_bios_init(nr_irqs, map);
91 static void __init ar71xx_detect_mem_size(void)
95 for (size = AR71XX_MEM_SIZE_MIN; size < AR71XX_MEM_SIZE_MAX;
97 if (!memcmp(ar71xx_detect_mem_size,
98 ar71xx_detect_mem_size + size, 1024))
102 add_memory_region(0, size, BOOT_MEM_RAM);
105 static void __init ar71xx_detect_sys_type(void)
113 id = ar71xx_reset_rr(AR71XX_RESET_REG_REV_ID);
114 major = id & REV_ID_MAJOR_MASK;
117 case REV_ID_MAJOR_AR71XX:
118 minor = id & AR71XX_REV_ID_MINOR_MASK;
119 rev = id >> AR71XX_REV_ID_REVISION_SHIFT;
120 rev &= AR71XX_REV_ID_REVISION_MASK;
122 case AR71XX_REV_ID_MINOR_AR7130:
123 ar71xx_soc = AR71XX_SOC_AR7130;
127 case AR71XX_REV_ID_MINOR_AR7141:
128 ar71xx_soc = AR71XX_SOC_AR7141;
132 case AR71XX_REV_ID_MINOR_AR7161:
133 ar71xx_soc = AR71XX_SOC_AR7161;
139 case REV_ID_MAJOR_AR724X:
140 ar71xx_soc = AR71XX_SOC_AR7240;
142 rev = (id & AR724X_REV_ID_REVISION_MASK);
145 case REV_ID_MAJOR_AR913X:
146 minor = id & AR91XX_REV_ID_MINOR_MASK;
147 rev = id >> AR91XX_REV_ID_REVISION_SHIFT;
148 rev &= AR91XX_REV_ID_REVISION_MASK;
150 case AR91XX_REV_ID_MINOR_AR9130:
151 ar71xx_soc = AR71XX_SOC_AR9130;
155 case AR91XX_REV_ID_MINOR_AR9132:
156 ar71xx_soc = AR71XX_SOC_AR9132;
163 panic("ar71xx: unknown chip id:0x%08x\n", id);
166 sprintf(ar71xx_sys_type, "Atheros AR%s rev %u", chip, rev);
169 static void __init ar91xx_detect_sys_frequency(void)
175 pll = ar71xx_pll_rr(AR91XX_PLL_REG_CPU_CONFIG);
177 div = ((pll >> AR91XX_PLL_DIV_SHIFT) & AR91XX_PLL_DIV_MASK);
178 freq = div * AR91XX_BASE_FREQ;
180 ar71xx_cpu_freq = freq;
182 div = ((pll >> AR91XX_DDR_DIV_SHIFT) & AR91XX_DDR_DIV_MASK) + 1;
183 ar71xx_ddr_freq = freq / div;
185 div = (((pll >> AR91XX_AHB_DIV_SHIFT) & AR91XX_AHB_DIV_MASK) + 1) * 2;
186 ar71xx_ahb_freq = ar71xx_cpu_freq / div;
189 static void __init ar71xx_detect_sys_frequency(void)
195 pll = ar71xx_pll_rr(AR71XX_PLL_REG_CPU_CONFIG);
197 div = ((pll >> AR71XX_PLL_DIV_SHIFT) & AR71XX_PLL_DIV_MASK) + 1;
198 freq = div * AR71XX_BASE_FREQ;
200 div = ((pll >> AR71XX_CPU_DIV_SHIFT) & AR71XX_CPU_DIV_MASK) + 1;
201 ar71xx_cpu_freq = freq / div;
203 div = ((pll >> AR71XX_DDR_DIV_SHIFT) & AR71XX_DDR_DIV_MASK) + 1;
204 ar71xx_ddr_freq = freq / div;
206 div = (((pll >> AR71XX_AHB_DIV_SHIFT) & AR71XX_AHB_DIV_MASK) + 1) * 2;
207 ar71xx_ahb_freq = ar71xx_cpu_freq / div;
210 static void __init ar724x_detect_sys_frequency(void)
216 pll = ar71xx_pll_rr(AR724X_PLL_REG_CPU_CONFIG);
218 div = ((pll >> AR724X_PLL_DIV_SHIFT) & AR724X_PLL_DIV_MASK);
219 freq = div * AR724X_BASE_FREQ;
221 div = ((pll >> AR724X_PLL_REF_DIV_SHIFT) & AR724X_PLL_REF_DIV_MASK);
224 ar71xx_cpu_freq = freq;
226 div = ((pll >> AR724X_DDR_DIV_SHIFT) & AR724X_DDR_DIV_MASK) + 1;
227 ar71xx_ddr_freq = freq / div;
229 div = (((pll >> AR724X_AHB_DIV_SHIFT) & AR724X_AHB_DIV_MASK) + 1) * 2;
230 ar71xx_ahb_freq = ar71xx_cpu_freq / div;
233 static void __init detect_sys_frequency(void)
235 switch (ar71xx_soc) {
236 case AR71XX_SOC_AR7130:
237 case AR71XX_SOC_AR7141:
238 case AR71XX_SOC_AR7161:
239 ar71xx_detect_sys_frequency();
242 case AR71XX_SOC_AR7240:
243 ar724x_detect_sys_frequency();
246 case AR71XX_SOC_AR9130:
247 case AR71XX_SOC_AR9132:
248 ar91xx_detect_sys_frequency();
256 #ifdef CONFIG_AR71XX_EARLY_SERIAL
257 static void __init ar71xx_early_serial_setup(void)
261 memset(&p, 0, sizeof(p));
263 p.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP;
264 p.iotype = UPIO_MEM32;
265 p.uartclk = ar71xx_ahb_freq;
266 p.irq = AR71XX_MISC_IRQ_UART;
268 p.mapbase = AR71XX_UART_BASE;
270 early_serial_setup(&p);
273 static inline void ar71xx_early_serial_setup(void) {};
274 #endif /* CONFIG_AR71XX_EARLY_SERIAL */
276 const char *get_system_type(void)
278 return ar71xx_sys_type;
281 unsigned int __cpuinit get_c0_compare_irq(void)
283 return CP0_LEGACY_COMPARE_IRQ;
286 void __init plat_mem_setup(void)
288 set_io_port_base(KSEG1);
290 ar71xx_ddr_base = ioremap_nocache(AR71XX_DDR_CTRL_BASE,
291 AR71XX_DDR_CTRL_SIZE);
293 ar71xx_pll_base = ioremap_nocache(AR71XX_PLL_BASE,
296 ar71xx_reset_base = ioremap_nocache(AR71XX_RESET_BASE,
299 ar71xx_gpio_base = ioremap_nocache(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE);
301 ar71xx_usb_ctrl_base = ioremap_nocache(AR71XX_USB_CTRL_BASE,
302 AR71XX_USB_CTRL_SIZE);
304 ar71xx_detect_mem_size();
305 ar71xx_detect_sys_type();
306 detect_sys_frequency();
309 "%s, CPU:%u.%03u MHz, AHB:%u.%03u MHz, DDR:%u.%03u MHz\n",
311 ar71xx_cpu_freq / 1000000, (ar71xx_cpu_freq / 1000) % 1000,
312 ar71xx_ahb_freq / 1000000, (ar71xx_ahb_freq / 1000) % 1000,
313 ar71xx_ddr_freq / 1000000, (ar71xx_ddr_freq / 1000) % 1000);
315 _machine_restart = ar71xx_restart;
316 _machine_halt = ar71xx_halt;
317 pm_power_off = ar71xx_halt;
319 board_be_handler = ar71xx_be_handler;
321 ar71xx_early_serial_setup();
324 void __init plat_time_init(void)
326 mips_hpt_frequency = ar71xx_cpu_freq / 2;
329 static int __init ar71xx_machine_setup(void)
333 ar71xx_add_device_uart();
334 ar71xx_add_device_wdt();
336 mips_machine_setup(ar71xx_mach);
340 arch_initcall(ar71xx_machine_setup);