2 * Atheros AR71xx SoC specific setup
4 * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com>
5 * Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
6 * Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
8 * Parts of this file are based on Atheros 2.6.15 BSP
9 * Parts of this file are based on Atheros 2.6.31 BSP
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License version 2 as published
13 * by the Free Software Foundation.
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/bootmem.h>
20 #include <asm/bootinfo.h>
21 #include <asm/time.h> /* for mips_hpt_frequency */
22 #include <asm/reboot.h> /* for _machine_{restart,halt} */
23 #include <asm/mips_machine.h>
25 #include <asm/mach-ar71xx/ar71xx.h>
30 #define AR71XX_SYS_TYPE_LEN 64
33 EXPORT_SYMBOL_GPL(ar71xx_cpu_freq
);
36 EXPORT_SYMBOL_GPL(ar71xx_ahb_freq
);
39 EXPORT_SYMBOL_GPL(ar71xx_ddr_freq
);
42 EXPORT_SYMBOL_GPL(ar71xx_ref_freq
);
44 enum ar71xx_soc_type ar71xx_soc
;
45 EXPORT_SYMBOL_GPL(ar71xx_soc
);
47 static char ar71xx_sys_type
[AR71XX_SYS_TYPE_LEN
];
49 static void ar71xx_restart(char *command
)
51 ar71xx_device_stop(RESET_MODULE_FULL_CHIP
);
57 static void ar71xx_halt(void)
63 static void __init
ar71xx_detect_mem_size(void)
67 for (size
= AR71XX_MEM_SIZE_MIN
; size
< AR71XX_MEM_SIZE_MAX
;
69 if (!memcmp(ar71xx_detect_mem_size
,
70 ar71xx_detect_mem_size
+ size
, 1024))
74 add_memory_region(0, size
, BOOT_MEM_RAM
);
77 static void __init
ar71xx_detect_sys_type(void)
85 id
= ar71xx_reset_rr(AR71XX_RESET_REG_REV_ID
);
86 major
= id
& REV_ID_MAJOR_MASK
;
89 case REV_ID_MAJOR_AR71XX
:
90 minor
= id
& AR71XX_REV_ID_MINOR_MASK
;
91 rev
= id
>> AR71XX_REV_ID_REVISION_SHIFT
;
92 rev
&= AR71XX_REV_ID_REVISION_MASK
;
94 case AR71XX_REV_ID_MINOR_AR7130
:
95 ar71xx_soc
= AR71XX_SOC_AR7130
;
99 case AR71XX_REV_ID_MINOR_AR7141
:
100 ar71xx_soc
= AR71XX_SOC_AR7141
;
104 case AR71XX_REV_ID_MINOR_AR7161
:
105 ar71xx_soc
= AR71XX_SOC_AR7161
;
111 case REV_ID_MAJOR_AR7240
:
112 ar71xx_soc
= AR71XX_SOC_AR7240
;
114 rev
= id
& AR724X_REV_ID_REVISION_MASK
;
117 case REV_ID_MAJOR_AR7241
:
118 ar71xx_soc
= AR71XX_SOC_AR7241
;
120 rev
= id
& AR724X_REV_ID_REVISION_MASK
;
123 case REV_ID_MAJOR_AR7242
:
124 ar71xx_soc
= AR71XX_SOC_AR7242
;
126 rev
= id
& AR724X_REV_ID_REVISION_MASK
;
129 case REV_ID_MAJOR_AR913X
:
130 minor
= id
& AR91XX_REV_ID_MINOR_MASK
;
131 rev
= id
>> AR91XX_REV_ID_REVISION_SHIFT
;
132 rev
&= AR91XX_REV_ID_REVISION_MASK
;
134 case AR91XX_REV_ID_MINOR_AR9130
:
135 ar71xx_soc
= AR71XX_SOC_AR9130
;
139 case AR91XX_REV_ID_MINOR_AR9132
:
140 ar71xx_soc
= AR71XX_SOC_AR9132
;
146 case REV_ID_MAJOR_AR9330
:
147 ar71xx_soc
= AR71XX_SOC_AR9330
;
149 rev
= id
& AR933X_REV_ID_REVISION_MASK
;
152 case REV_ID_MAJOR_AR9331
:
153 ar71xx_soc
= AR71XX_SOC_AR9331
;
155 rev
= id
& AR933X_REV_ID_REVISION_MASK
;
158 case REV_ID_MAJOR_AR9342
:
159 ar71xx_soc
= AR71XX_SOC_AR9342
;
161 rev
= id
& AR934X_REV_ID_REVISION_MASK
;
164 case REV_ID_MAJOR_AR9344
:
165 ar71xx_soc
= AR71XX_SOC_AR9344
;
167 rev
= id
& AR934X_REV_ID_REVISION_MASK
;
171 panic("ar71xx: unknown chip id:0x%08x\n", id
);
174 sprintf(ar71xx_sys_type
, "Atheros AR%s rev %u", chip
, rev
);
175 pr_info("SoC: %s\n", ar71xx_sys_type
);
178 static void __init
ar934x_detect_sys_frequency(void)
180 u32 pll
, out_div
, ref_div
, nint
, frac
, clk_ctrl
, postdiv
;
182 if (ar71xx_reset_rr(AR934X_RESET_REG_BOOTSTRAP
) & AR934X_REF_CLK_40
)
183 ar71xx_ref_freq
= 40 * 1000 * 1000;
185 ar71xx_ref_freq
= 25 * 1000 * 1000;
187 clk_ctrl
= ar71xx_pll_rr(AR934X_PLL_REG_DDR_CTRL_CLOCK
);
189 pll
= ar71xx_pll_rr(AR934X_PLL_REG_CPU_CONFIG
);
190 out_div
= AR934X_CPU_PLL_CFG_OUTDIV_GET(pll
);
191 ref_div
= AR934X_CPU_PLL_CFG_REFDIV_GET(pll
);
192 nint
= AR934X_CPU_PLL_CFG_NINT_GET(pll
);
193 frac
= AR934X_CPU_PLL_CFG_NFRAC_GET(pll
);
194 postdiv
= AR934X_CPU_DDR_CLK_CTRL_CPU_POST_DIV_GET(clk_ctrl
);
195 ar71xx_cpu_freq
= ((nint
* ar71xx_ref_freq
/ ref_div
) >> out_div
) /
198 out_div
= AR934X_DDR_PLL_CFG_OUTDIV_GET(pll
);
199 ref_div
= AR934X_DDR_PLL_CFG_REFDIV_GET(pll
);
200 nint
= AR934X_DDR_PLL_CFG_NINT_GET(pll
);
201 frac
= AR934X_DDR_PLL_CFG_NFRAC_GET(pll
);
202 postdiv
= AR934X_CPU_DDR_CLK_CTRL_DDR_POST_DIV_GET(clk_ctrl
);
203 ar71xx_ddr_freq
= ((nint
* ar71xx_ref_freq
/ ref_div
) >> out_div
) /
206 postdiv
= AR934X_CPU_DDR_CLK_CTRL_AHB_POST_DIV_GET(clk_ctrl
);
208 if (AR934X_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL_GET(clk_ctrl
)) {
209 ar71xx_ahb_freq
= ar71xx_ddr_freq
/ (postdiv
+ 1);
211 ar71xx_ahb_freq
= ar71xx_cpu_freq
/ (postdiv
+ 1);
216 static void __init
ar91xx_detect_sys_frequency(void)
222 ar71xx_ref_freq
= 5 * 1000 * 1000;
224 pll
= ar71xx_pll_rr(AR91XX_PLL_REG_CPU_CONFIG
);
226 div
= ((pll
>> AR91XX_PLL_DIV_SHIFT
) & AR91XX_PLL_DIV_MASK
);
227 freq
= div
* ar71xx_ref_freq
;
229 ar71xx_cpu_freq
= freq
;
231 div
= ((pll
>> AR91XX_DDR_DIV_SHIFT
) & AR91XX_DDR_DIV_MASK
) + 1;
232 ar71xx_ddr_freq
= freq
/ div
;
234 div
= (((pll
>> AR91XX_AHB_DIV_SHIFT
) & AR91XX_AHB_DIV_MASK
) + 1) * 2;
235 ar71xx_ahb_freq
= ar71xx_cpu_freq
/ div
;
238 static void __init
ar71xx_detect_sys_frequency(void)
244 ar71xx_ref_freq
= 40 * 1000 * 1000;
246 pll
= ar71xx_pll_rr(AR71XX_PLL_REG_CPU_CONFIG
);
248 div
= ((pll
>> AR71XX_PLL_DIV_SHIFT
) & AR71XX_PLL_DIV_MASK
) + 1;
249 freq
= div
* ar71xx_ref_freq
;
251 div
= ((pll
>> AR71XX_CPU_DIV_SHIFT
) & AR71XX_CPU_DIV_MASK
) + 1;
252 ar71xx_cpu_freq
= freq
/ div
;
254 div
= ((pll
>> AR71XX_DDR_DIV_SHIFT
) & AR71XX_DDR_DIV_MASK
) + 1;
255 ar71xx_ddr_freq
= freq
/ div
;
257 div
= (((pll
>> AR71XX_AHB_DIV_SHIFT
) & AR71XX_AHB_DIV_MASK
) + 1) * 2;
258 ar71xx_ahb_freq
= ar71xx_cpu_freq
/ div
;
261 static void __init
ar724x_detect_sys_frequency(void)
267 ar71xx_ref_freq
= 5 * 1000 * 1000;
269 pll
= ar71xx_pll_rr(AR724X_PLL_REG_CPU_CONFIG
);
271 div
= ((pll
>> AR724X_PLL_DIV_SHIFT
) & AR724X_PLL_DIV_MASK
);
272 freq
= div
* ar71xx_ref_freq
;
274 div
= ((pll
>> AR724X_PLL_REF_DIV_SHIFT
) & AR724X_PLL_REF_DIV_MASK
);
277 ar71xx_cpu_freq
= freq
;
279 div
= ((pll
>> AR724X_DDR_DIV_SHIFT
) & AR724X_DDR_DIV_MASK
) + 1;
280 ar71xx_ddr_freq
= freq
/ div
;
282 div
= (((pll
>> AR724X_AHB_DIV_SHIFT
) & AR724X_AHB_DIV_MASK
) + 1) * 2;
283 ar71xx_ahb_freq
= ar71xx_cpu_freq
/ div
;
286 static void __init
ar933x_detect_sys_frequency(void)
293 t
= ar71xx_reset_rr(AR933X_RESET_REG_BOOTSTRAP
);
294 if (t
& AR933X_BOOTSTRAP_REF_CLK_40
)
295 ar71xx_ref_freq
= (40 * 1000 * 1000);
297 ar71xx_ref_freq
= (25 * 1000 * 1000);
299 clock_ctrl
= ar71xx_pll_rr(AR933X_PLL_CLOCK_CTRL_REG
);
300 if (clock_ctrl
& AR933X_PLL_CLOCK_CTRL_BYPASS
) {
301 ar71xx_cpu_freq
= ar71xx_ref_freq
;
302 ar71xx_ahb_freq
= ar71xx_ref_freq
;
303 ar71xx_ddr_freq
= ar71xx_ref_freq
;
305 cpu_config
= ar71xx_pll_rr(AR933X_PLL_CPU_CONFIG_REG
);
307 t
= (cpu_config
>> AR933X_PLL_CPU_CONFIG_REFDIV_SHIFT
) &
308 AR933X_PLL_CPU_CONFIG_REFDIV_MASK
;
309 freq
= ar71xx_ref_freq
/ t
;
311 t
= (cpu_config
>> AR933X_PLL_CPU_CONFIG_NINT_SHIFT
) &
312 AR933X_PLL_CPU_CONFIG_NINT_MASK
;
315 t
= (cpu_config
>> AR933X_PLL_CPU_CONFIG_OUTDIV_SHIFT
) &
316 AR933X_PLL_CPU_CONFIG_OUTDIV_MASK
;
322 t
= ((clock_ctrl
>> AR933X_PLL_CLOCK_CTRL_CPU_DIV_SHIFT
) &
323 AR933X_PLL_CLOCK_CTRL_CPU_DIV_MASK
) + 1;
324 ar71xx_cpu_freq
= freq
/ t
;
326 t
= ((clock_ctrl
>> AR933X_PLL_CLOCK_CTRL_DDR_DIV_SHIFT
) &
327 AR933X_PLL_CLOCK_CTRL_DDR_DIV_MASK
) + 1;
328 ar71xx_ddr_freq
= freq
/ t
;
330 t
= ((clock_ctrl
>> AR933X_PLL_CLOCK_CTRL_AHB_DIV_SHIFT
) &
331 AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK
) + 1;
332 ar71xx_ahb_freq
= freq
/ t
;
336 static void __init
detect_sys_frequency(void)
338 switch (ar71xx_soc
) {
339 case AR71XX_SOC_AR7130
:
340 case AR71XX_SOC_AR7141
:
341 case AR71XX_SOC_AR7161
:
342 ar71xx_detect_sys_frequency();
345 case AR71XX_SOC_AR7240
:
346 case AR71XX_SOC_AR7241
:
347 case AR71XX_SOC_AR7242
:
348 ar724x_detect_sys_frequency();
351 case AR71XX_SOC_AR9130
:
352 case AR71XX_SOC_AR9132
:
353 ar91xx_detect_sys_frequency();
356 case AR71XX_SOC_AR9330
:
357 case AR71XX_SOC_AR9331
:
358 ar933x_detect_sys_frequency();
361 case AR71XX_SOC_AR9341
:
362 case AR71XX_SOC_AR9342
:
363 case AR71XX_SOC_AR9344
:
364 ar934x_detect_sys_frequency();
371 const char *get_system_type(void)
373 return ar71xx_sys_type
;
376 unsigned int __cpuinit
get_c0_compare_irq(void)
378 return CP0_LEGACY_COMPARE_IRQ
;
381 void __init
plat_mem_setup(void)
383 set_io_port_base(KSEG1
);
385 ar71xx_ddr_base
= ioremap_nocache(AR71XX_DDR_CTRL_BASE
,
386 AR71XX_DDR_CTRL_SIZE
);
388 ar71xx_pll_base
= ioremap_nocache(AR71XX_PLL_BASE
,
391 ar71xx_reset_base
= ioremap_nocache(AR71XX_RESET_BASE
,
394 ar71xx_gpio_base
= ioremap_nocache(AR71XX_GPIO_BASE
, AR71XX_GPIO_SIZE
);
396 ar71xx_usb_ctrl_base
= ioremap_nocache(AR71XX_USB_CTRL_BASE
,
397 AR71XX_USB_CTRL_SIZE
);
399 ar71xx_detect_mem_size();
400 ar71xx_detect_sys_type();
401 detect_sys_frequency();
403 pr_info("Clocks: CPU:%u.%03uMHz, DDR:%u.%03uMHz, AHB:%u.%03uMHz, "
405 ar71xx_cpu_freq
/ 1000000, (ar71xx_cpu_freq
/ 1000) % 1000,
406 ar71xx_ddr_freq
/ 1000000, (ar71xx_ddr_freq
/ 1000) % 1000,
407 ar71xx_ahb_freq
/ 1000000, (ar71xx_ahb_freq
/ 1000) % 1000,
408 ar71xx_ref_freq
/ 1000000, (ar71xx_ref_freq
/ 1000) % 1000);
410 _machine_restart
= ar71xx_restart
;
411 _machine_halt
= ar71xx_halt
;
412 pm_power_off
= ar71xx_halt
;
415 void __init
plat_time_init(void)
417 mips_hpt_frequency
= ar71xx_cpu_freq
/ 2;
420 __setup("board=", mips_machtype_setup
);
422 static int __init
ar71xx_machine_setup(void)
426 ar71xx_add_device_uart();
427 ar71xx_add_device_wdt();
429 mips_machine_setup();
433 arch_initcall(ar71xx_machine_setup
);
435 static void __init
ar71xx_generic_init(void)
440 MIPS_MACHINE(AR71XX_MACH_GENERIC
, "Generic", "Generic AR71xx board",
441 ar71xx_generic_init
);