2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved.
7 * Copyright (C) 2006 FON Technology, SL.
8 * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
9 * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
13 * Platform devices for Atheros SoCs
16 #include <linux/autoconf.h>
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/types.h>
20 #include <linux/string.h>
21 #include <linux/mtd/physmap.h>
22 #include <linux/platform_device.h>
23 #include <linux/kernel.h>
24 #include <linux/reboot.h>
25 #include <asm/bootinfo.h>
26 #include <asm/reboot.h>
31 #include <linux/leds.h>
35 static int is_5312 = 0;
36 static struct platform_device *ar5312_devs[6];
38 static struct resource ar5312_eth0_res[] = {
40 .name = "eth0_membase",
41 .flags = IORESOURCE_MEM,
42 .start = KSEG1ADDR(AR531X_ENET0),
43 .end = KSEG1ADDR(AR531X_ENET0 + 0x2000),
47 .flags = IORESOURCE_IRQ,
48 .start = AR5312_IRQ_ENET0_INTRS,
49 .end = AR5312_IRQ_ENET0_INTRS,
52 static struct ar531x_eth ar5312_eth0_data = {
55 .reset_base = AR531X_RESET,
56 .reset_mac = AR531X_RESET_ENET0,
57 .reset_phy = AR531X_RESET_EPHY0,
58 .phy_base = KSEG1ADDR(AR531X_ENET0),
61 static struct resource ar5312_eth1_res[] = {
63 .name = "eth1_membase",
64 .flags = IORESOURCE_MEM,
65 .start = KSEG1ADDR(AR531X_ENET1),
66 .end = KSEG1ADDR(AR531X_ENET1 + 0x2000),
70 .flags = IORESOURCE_IRQ,
71 .start = AR5312_IRQ_ENET1_INTRS,
72 .end = AR5312_IRQ_ENET1_INTRS,
75 static struct ar531x_eth ar5312_eth1_data = {
78 .reset_base = AR531X_RESET,
79 .reset_mac = AR531X_RESET_ENET1,
80 .reset_phy = AR531X_RESET_EPHY1,
81 .phy_base = KSEG1ADDR(AR531X_ENET1),
84 static struct platform_device ar5312_eth[] = {
88 .dev.platform_data = &ar5312_eth0_data,
89 .resource = ar5312_eth0_res,
90 .num_resources = ARRAY_SIZE(ar5312_eth0_res)
95 .dev.platform_data = &ar5312_eth1_data,
96 .resource = ar5312_eth1_res,
97 .num_resources = ARRAY_SIZE(ar5312_eth1_res)
103 * AR2312/3 ethernet uses the PHY of ENET0, but the MAC
104 * of ENET1. Atheros calls it 'twisted' for a reason :)
106 static struct resource ar231x_eth0_res[] = {
108 .name = "eth0_membase",
109 .flags = IORESOURCE_MEM,
110 .start = KSEG1ADDR(AR531X_ENET1),
111 .end = KSEG1ADDR(AR531X_ENET1 + 0x2000),
115 .flags = IORESOURCE_IRQ,
116 .start = AR5312_IRQ_ENET1_INTRS,
117 .end = AR5312_IRQ_ENET1_INTRS,
120 static struct ar531x_eth ar231x_eth0_data = {
123 .reset_base = AR531X_RESET,
124 .reset_mac = AR531X_RESET_ENET1,
125 .reset_phy = AR531X_RESET_EPHY1,
126 .phy_base = KSEG1ADDR(AR531X_ENET0),
128 static struct platform_device ar231x_eth0 = {
130 .name = "ar531x-eth",
131 .dev.platform_data = &ar231x_eth0_data,
132 .resource = ar231x_eth0_res,
133 .num_resources = ARRAY_SIZE(ar231x_eth0_res)
137 static struct platform_device ar5312_wmac[] = {
140 .name = "ar531x-wmac",
144 .name = "ar531x-wmac",
148 static struct physmap_flash_data ar5312_flash_data = {
152 static struct resource ar5312_flash_resource = {
153 .start = AR531X_FLASH,
154 .end = AR531X_FLASH + 0x800000 - 1,
155 .flags = IORESOURCE_MEM,
158 static struct platform_device ar5312_physmap_flash = {
159 .name = "physmap-flash",
162 .platform_data = &ar5312_flash_data,
165 .resource = &ar5312_flash_resource,
168 #ifdef CONFIG_LEDS_GPIO
169 static struct gpio_led ar5312_leds[] = {
170 { .name = "wlan", .gpio = 0, .active_low = 1, },
173 static const struct gpio_led_platform_data ar5312_led_data = {
174 .num_leds = ARRAY_SIZE(ar5312_leds),
175 .leds = (void *) ar5312_leds,
178 static struct platform_device ar5312_gpio_leds = {
182 .platform_data = (void *) &ar5312_led_data,
188 * NB: This mapping size is larger than the actual flash size,
189 * but this shouldn't be a problem here, because the flash
190 * will simply be mapped multiple times.
192 static char __init *ar5312_flash_limit(void)
196 * Configure flash bank 0.
197 * Assume 8M window size. Flash will be aliased if it's smaller
202 (0x01 << FLASHCTL_IDCY_S) |
203 (0x07 << FLASHCTL_WST1_S) |
204 (0x07 << FLASHCTL_WST2_S) |
205 (sysRegRead(AR531X_FLASHCTL0) & FLASHCTL_MW);
207 sysRegWrite(AR531X_FLASHCTL0, ctl);
209 /* Disable other flash banks */
210 sysRegWrite(AR531X_FLASHCTL1,
211 sysRegRead(AR531X_FLASHCTL1) & ~(FLASHCTL_E | FLASHCTL_AC));
213 sysRegWrite(AR531X_FLASHCTL2,
214 sysRegRead(AR531X_FLASHCTL2) & ~(FLASHCTL_E | FLASHCTL_AC));
216 return (char *) KSEG1ADDR(AR531X_FLASH + 0x800000);
219 static struct ar531x_config __init *init_wmac(int unit)
221 struct ar531x_config *config;
223 config = (struct ar531x_config *) kzalloc(sizeof(struct ar531x_config), GFP_KERNEL);
224 config->board = board_config;
225 config->radio = radio_config;
227 config->tag = (u_int16_t) ((sysRegRead(AR531X_REV) >> AR531X_REV_WMAC_MIN_S) & AR531X_REV_CHIP);
232 int __init ar5312_init_devices(void)
234 struct ar531x_boarddata *bcfg;
242 /* Locate board/radio config data */
243 ar531x_find_config(ar5312_flash_limit());
244 bcfg = (struct ar531x_boarddata *) board_config;
248 * Chip IDs and hardware detection for some Atheros
249 * models are really broken!
251 * Atheros uses a disabled WMAC0 and Silicon ID of AR5312
252 * as indication for AR2312, which is otherwise
253 * indistinguishable from the real AR5312.
256 radio = radio_config + AR531X_RADIO_MASK_OFF;
257 if ((*((u32 *) radio) & AR531X_RADIO0_MASK) == 0)
258 bcfg->config |= BD_ISCASPER;
262 /* AR2313 has CPU minor rev. 10 */
263 if ((current_cpu_data.processor_id & 0xff) == 0x0a)
264 mips_machtype = MACH_ATHEROS_AR2313;
266 /* AR2312 shares the same Silicon ID as AR5312 */
267 else if (bcfg->config & BD_ISCASPER)
268 mips_machtype = MACH_ATHEROS_AR2312;
270 /* Everything else is probably AR5312 or compatible */
272 mips_machtype = MACH_ATHEROS_AR5312;
274 ar5312_eth0_data.board_config = board_config;
275 ar5312_eth1_data.board_config = board_config;
277 /* fixup flash width */
278 fctl = sysRegRead(AR531X_FLASHCTL) & FLASHCTL_MW;
281 ar5312_flash_data.width = 2;
285 ar5312_flash_data.width = 1;
289 ar5312_devs[dev++] = &ar5312_physmap_flash;
291 ar5312_leds[0].gpio = bcfg->sysLedGpio;
292 ar5312_devs[dev++] = &ar5312_gpio_leds;
294 if (!memcmp(bcfg->enet0Mac, "\xff\xff\xff\xff\xff\xff", 6))
295 memcpy(bcfg->enet0Mac, bcfg->enet1Mac, 6);
297 if (memcmp(bcfg->enet0Mac, bcfg->enet1Mac, 6) == 0) {
298 /* ENET0 and ENET1 have the same mac.
299 * Increment the one from ENET1 */
300 c = bcfg->enet1Mac + 5;
301 while ((c >= (char *) bcfg->enet1Mac) && !(++(*c)))
305 switch(mips_machtype) {
306 case MACH_ATHEROS_AR5312:
307 ar5312_eth0_data.macaddr = bcfg->enet0Mac;
308 ar5312_eth1_data.macaddr = bcfg->enet1Mac;
309 ar5312_devs[dev++] = &ar5312_eth[0];
310 ar5312_devs[dev++] = &ar5312_eth[1];
312 case MACH_ATHEROS_AR2312:
313 case MACH_ATHEROS_AR2313:
314 ar231x_eth0_data.macaddr = bcfg->enet0Mac;
315 ar5312_devs[dev++] = &ar231x_eth0;
316 ar5312_flash_data.width = 1;
321 if (mips_machtype == MACH_ATHEROS_AR5312) {
322 if (*((u32 *) radio) & AR531X_RADIO0_MASK) {
323 ar5312_wmac[0].dev.platform_data = init_wmac(0);
324 ar5312_devs[dev++] = &ar5312_wmac[0];
327 if (*((u32 *) radio) & AR531X_RADIO1_MASK) {
328 ar5312_wmac[1].dev.platform_data = init_wmac(1);
329 ar5312_devs[dev++] = &ar5312_wmac[1];
333 return platform_add_devices(ar5312_devs, dev);
337 static void ar5312_halt(void)
342 static void ar5312_power_off(void)
348 static void ar5312_restart(char *command)
350 /* reset the system */
351 for(;;) sysRegWrite(AR531X_RESET, AR531X_RESET_SYSTEM);
356 * This table is indexed by bits 5..4 of the CLOCKCTL1 register
357 * to determine the predevisor value.
359 static int __initdata CLOCKCTL1_PREDIVIDE_TABLE[4] = {
367 static unsigned int __init ar5312_cpu_frequency(void)
370 unsigned int predivide_mask, predivide_shift;
371 unsigned int multiplier_mask, multiplier_shift;
372 unsigned int clockCtl1, preDivideSelect, preDivisor, multiplier;
373 unsigned int doubler_mask;
374 unsigned int wisoc_revision;
376 /* Trust the bootrom's idea of cpu frequency. */
377 if ((result = sysRegRead(AR5312_SCRATCH)))
380 wisoc_revision = (sysRegRead(AR531X_REV) & AR531X_REV_MAJ) >> AR531X_REV_MAJ_S;
381 if (wisoc_revision == AR531X_REV_MAJ_AR2313) {
382 predivide_mask = AR2313_CLOCKCTL1_PREDIVIDE_MASK;
383 predivide_shift = AR2313_CLOCKCTL1_PREDIVIDE_SHIFT;
384 multiplier_mask = AR2313_CLOCKCTL1_MULTIPLIER_MASK;
385 multiplier_shift = AR2313_CLOCKCTL1_MULTIPLIER_SHIFT;
386 doubler_mask = AR2313_CLOCKCTL1_DOUBLER_MASK;
387 } else { /* AR5312 and AR2312 */
388 predivide_mask = AR5312_CLOCKCTL1_PREDIVIDE_MASK;
389 predivide_shift = AR5312_CLOCKCTL1_PREDIVIDE_SHIFT;
390 multiplier_mask = AR5312_CLOCKCTL1_MULTIPLIER_MASK;
391 multiplier_shift = AR5312_CLOCKCTL1_MULTIPLIER_SHIFT;
392 doubler_mask = AR5312_CLOCKCTL1_DOUBLER_MASK;
396 * Clocking is derived from a fixed 40MHz input clock.
398 * cpuFreq = InputClock * MULT (where MULT is PLL multiplier)
399 * sysFreq = cpuFreq / 4 (used for APB clock, serial,
400 * flash, Timer, Watchdog Timer)
402 * cntFreq = cpuFreq / 2 (use for CPU count/compare)
404 * So, for example, with a PLL multiplier of 5, we have
410 * We compute the CPU frequency, based on PLL settings.
413 clockCtl1 = sysRegRead(AR5312_CLOCKCTL1);
414 preDivideSelect = (clockCtl1 & predivide_mask) >> predivide_shift;
415 preDivisor = CLOCKCTL1_PREDIVIDE_TABLE[preDivideSelect];
416 multiplier = (clockCtl1 & multiplier_mask) >> multiplier_shift;
418 if (clockCtl1 & doubler_mask) {
419 multiplier = multiplier << 1;
421 return (40000000 / preDivisor) * multiplier;
424 static inline int ar5312_sys_frequency(void)
426 return ar5312_cpu_frequency() / 4;
429 static void __init ar5312_time_init(void)
431 mips_hpt_frequency = ar5312_cpu_frequency() / 2;
435 void __init ar5312_prom_init(void)
437 u32 memsize, memcfg, bank0AC, bank1AC;
441 /* Detect memory size */
442 memcfg = sysRegRead(AR531X_MEM_CFG1);
443 bank0AC = (memcfg & MEM_CFG1_AC0) >> MEM_CFG1_AC0_S;
444 bank1AC = (memcfg & MEM_CFG1_AC1) >> MEM_CFG1_AC1_S;
445 memsize = (bank0AC ? (1 << (bank0AC+1)) : 0)
446 + (bank1AC ? (1 << (bank1AC+1)) : 0);
448 add_memory_region(0, memsize, BOOT_MEM_RAM);
450 /* Initialize it to AR5312 for now. Real detection will be done
451 * in ar5312_init_devices() */
452 mips_machtype = MACH_ATHEROS_AR5312;
455 void __init ar5312_plat_setup(void)
457 /* Clear any lingering AHB errors */
458 sysRegRead(AR531X_PROCADDR);
459 sysRegRead(AR531X_DMAADDR);
460 sysRegWrite(AR531X_WD_CTRL, AR531X_WD_CTRL_IGNORE_EXPIRATION);
462 board_time_init = ar5312_time_init;
464 _machine_restart = ar5312_restart;
465 _machine_halt = ar5312_halt;
466 pm_power_off = ar5312_power_off;
468 serial_setup(KSEG1ADDR(AR531X_UART0), ar5312_sys_frequency());
471 arch_initcall(ar5312_init_devices);