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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-orion5x/dns323-setup.c

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  1 /*
  2  * arch/arm/mach-orion5x/dns323-setup.c
  3  *
  4  * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
  5  *
  6  * Support for HW Rev C1:
  7  *
  8  * Copyright (C) 2010 Benjamin Herrenschmidt <benh@kernel.crashing.org>
  9  *
 10  * This program is free software; you can redistribute it and/or modify
 11  * it under the terms of the GNU Lesser General Public License as
 12  * published by the Free Software Foundation; either version 2 of the
 13  * License, or (at your option) any later version.
 14  *
 15  */
 16 #include <linux/gpio.h>
 17 #include <linux/kernel.h>
 18 #include <linux/init.h>
 19 #include <linux/delay.h>
 20 #include <linux/platform_device.h>
 21 #include <linux/pci.h>
 22 #include <linux/irq.h>
 23 #include <linux/mtd/physmap.h>
 24 #include <linux/mv643xx_eth.h>
 25 #include <linux/leds.h>
 26 #include <linux/gpio_keys.h>
 27 #include <linux/input.h>
 28 #include <linux/i2c.h>
 29 #include <linux/ata_platform.h>
 30 #include <linux/phy.h>
 31 #include <linux/marvell_phy.h>
 32 #include <asm/mach-types.h>
 33 #include <asm/mach/arch.h>
 34 #include <asm/mach/pci.h>
 35 #include <asm/system_info.h>
 36 #include <plat/orion-gpio.h>
 37 #include "orion5x.h"
 38 #include "common.h"
 39 #include "mpp.h"
 40 
 41 /* Rev A1 and B1 */
 42 #define DNS323_GPIO_LED_RIGHT_AMBER     1
 43 #define DNS323_GPIO_LED_LEFT_AMBER      2
 44 #define DNS323_GPIO_SYSTEM_UP           3
 45 #define DNS323_GPIO_LED_POWER1          4
 46 #define DNS323_GPIO_LED_POWER2          5
 47 #define DNS323_GPIO_OVERTEMP            6
 48 #define DNS323_GPIO_RTC                 7
 49 #define DNS323_GPIO_POWER_OFF           8
 50 #define DNS323_GPIO_KEY_POWER           9
 51 #define DNS323_GPIO_KEY_RESET           10
 52 
 53 /* Rev C1 */
 54 #define DNS323C_GPIO_KEY_POWER          1
 55 #define DNS323C_GPIO_POWER_OFF          2
 56 #define DNS323C_GPIO_LED_RIGHT_AMBER    8
 57 #define DNS323C_GPIO_LED_LEFT_AMBER     9
 58 #define DNS323C_GPIO_LED_POWER          17
 59 #define DNS323C_GPIO_FAN_BIT1           18
 60 #define DNS323C_GPIO_FAN_BIT0           19
 61 
 62 /* Exposed to userspace, do not change */
 63 enum {
 64         DNS323_REV_A1,  /* 0 */
 65         DNS323_REV_B1,  /* 1 */
 66         DNS323_REV_C1,  /* 2 */
 67 };
 68 
 69 
 70 /****************************************************************************
 71  * PCI setup
 72  */
 73 
 74 static int __init dns323_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 75 {
 76         int irq;
 77 
 78         /*
 79          * Check for devices with hard-wired IRQs.
 80          */
 81         irq = orion5x_pci_map_irq(dev, slot, pin);
 82         if (irq != -1)
 83                 return irq;
 84 
 85         return -1;
 86 }
 87 
 88 static struct hw_pci dns323_pci __initdata = {
 89         .nr_controllers = 2,
 90         .setup          = orion5x_pci_sys_setup,
 91         .scan           = orion5x_pci_sys_scan_bus,
 92         .map_irq        = dns323_pci_map_irq,
 93 };
 94 
 95 static int __init dns323_pci_init(void)
 96 {
 97         /* Rev B1 and C1 doesn't really use its PCI bus, and initialising PCI
 98          * gets in the way of initialising the SATA controller.
 99          */
100         if (machine_is_dns323() && system_rev == DNS323_REV_A1)
101                 pci_common_init(&dns323_pci);
102 
103         return 0;
104 }
105 
106 subsys_initcall(dns323_pci_init);
107 
108 /****************************************************************************
109  * 8MiB NOR flash (Spansion S29GL064M90TFIR4)
110  *
111  * Layout as used by D-Link:
112  *  0x00000000-0x00010000 : "MTD1"
113  *  0x00010000-0x00020000 : "MTD2"
114  *  0x00020000-0x001a0000 : "Linux Kernel"
115  *  0x001a0000-0x007d0000 : "File System"
116  *  0x007d0000-0x00800000 : "u-boot"
117  */
118 
119 #define DNS323_NOR_BOOT_BASE 0xf4000000
120 #define DNS323_NOR_BOOT_SIZE SZ_8M
121 
122 static struct mtd_partition dns323_partitions[] = {
123         {
124                 .name   = "MTD1",
125                 .size   = 0x00010000,
126                 .offset = 0,
127         }, {
128                 .name   = "MTD2",
129                 .size   = 0x00010000,
130                 .offset = 0x00010000,
131         }, {
132                 .name   = "Linux Kernel",
133                 .size   = 0x00180000,
134                 .offset = 0x00020000,
135         }, {
136                 .name   = "File System",
137                 .size   = 0x00630000,
138                 .offset = 0x001A0000,
139         }, {
140                 .name   = "u-boot",
141                 .size   = 0x00030000,
142                 .offset = 0x007d0000,
143         },
144 };
145 
146 static struct physmap_flash_data dns323_nor_flash_data = {
147         .width          = 1,
148         .parts          = dns323_partitions,
149         .nr_parts       = ARRAY_SIZE(dns323_partitions)
150 };
151 
152 static struct resource dns323_nor_flash_resource = {
153         .flags          = IORESOURCE_MEM,
154         .start          = DNS323_NOR_BOOT_BASE,
155         .end            = DNS323_NOR_BOOT_BASE + DNS323_NOR_BOOT_SIZE - 1,
156 };
157 
158 static struct platform_device dns323_nor_flash = {
159         .name           = "physmap-flash",
160         .id             = 0,
161         .dev            = {
162                 .platform_data  = &dns323_nor_flash_data,
163         },
164         .resource       = &dns323_nor_flash_resource,
165         .num_resources  = 1,
166 };
167 
168 /****************************************************************************
169  * Ethernet
170  */
171 
172 static struct mv643xx_eth_platform_data dns323_eth_data = {
173         .phy_addr = MV643XX_ETH_PHY_ADDR(8),
174 };
175 
176 /* dns323_parse_hex_*() taken from tsx09-common.c; should a common copy of these
177  * functions be kept somewhere?
178  */
179 static int __init dns323_parse_hex_nibble(char n)
180 {
181         if (n >= '' && n <= '9')
182                 return n - '';
183 
184         if (n >= 'A' && n <= 'F')
185                 return n - 'A' + 10;
186 
187         if (n >= 'a' && n <= 'f')
188                 return n - 'a' + 10;
189 
190         return -1;
191 }
192 
193 static int __init dns323_parse_hex_byte(const char *b)
194 {
195         int hi;
196         int lo;
197 
198         hi = dns323_parse_hex_nibble(b[0]);
199         lo = dns323_parse_hex_nibble(b[1]);
200 
201         if (hi < 0 || lo < 0)
202                 return -1;
203 
204         return (hi << 4) | lo;
205 }
206 
207 static int __init dns323_read_mac_addr(void)
208 {
209         u_int8_t addr[6];
210         int i;
211         char *mac_page;
212 
213         /* MAC address is stored as a regular ol' string in /dev/mtdblock4
214          * (0x007d0000-0x00800000) starting at offset 196480 (0x2ff80).
215          */
216         mac_page = ioremap(DNS323_NOR_BOOT_BASE + 0x7d0000 + 196480, 1024);
217         if (!mac_page)
218                 return -ENOMEM;
219 
220         /* Sanity check the string we're looking at */
221         for (i = 0; i < 5; i++) {
222                 if (*(mac_page + (i * 3) + 2) != ':') {
223                         goto error_fail;
224                 }
225         }
226 
227         for (i = 0; i < 6; i++) {
228                 int byte;
229 
230                 byte = dns323_parse_hex_byte(mac_page + (i * 3));
231                 if (byte < 0) {
232                         goto error_fail;
233                 }
234 
235                 addr[i] = byte;
236         }
237 
238         iounmap(mac_page);
239         printk("DNS-323: Found ethernet MAC address: %pM\n", addr);
240 
241         memcpy(dns323_eth_data.mac_addr, addr, 6);
242 
243         return 0;
244 
245 error_fail:
246         iounmap(mac_page);
247         return -EINVAL;
248 }
249 
250 /****************************************************************************
251  * GPIO LEDs (simple - doesn't use hardware blinking support)
252  */
253 
254 static struct gpio_led dns323ab_leds[] = {
255         {
256                 .name = "power:blue",
257                 .gpio = DNS323_GPIO_LED_POWER2,
258                 .default_trigger = "default-on",
259         }, {
260                 .name = "right:amber",
261                 .gpio = DNS323_GPIO_LED_RIGHT_AMBER,
262                 .active_low = 1,
263         }, {
264                 .name = "left:amber",
265                 .gpio = DNS323_GPIO_LED_LEFT_AMBER,
266                 .active_low = 1,
267         },
268 };
269 
270 
271 static struct gpio_led dns323c_leds[] = {
272         {
273                 .name = "power:blue",
274                 .gpio = DNS323C_GPIO_LED_POWER,
275                 .default_trigger = "timer",
276                 .active_low = 1,
277         }, {
278                 .name = "right:amber",
279                 .gpio = DNS323C_GPIO_LED_RIGHT_AMBER,
280                 .active_low = 1,
281         }, {
282                 .name = "left:amber",
283                 .gpio = DNS323C_GPIO_LED_LEFT_AMBER,
284                 .active_low = 1,
285         },
286 };
287 
288 
289 static struct gpio_led_platform_data dns323ab_led_data = {
290         .num_leds       = ARRAY_SIZE(dns323ab_leds),
291         .leds           = dns323ab_leds,
292         .gpio_blink_set = orion_gpio_led_blink_set,
293 };
294 
295 static struct gpio_led_platform_data dns323c_led_data = {
296         .num_leds       = ARRAY_SIZE(dns323c_leds),
297         .leds           = dns323c_leds,
298         .gpio_blink_set = orion_gpio_led_blink_set,
299 };
300 
301 static struct platform_device dns323_gpio_leds = {
302         .name           = "leds-gpio",
303         .id             = -1,
304         .dev            = {
305                 .platform_data  = &dns323ab_led_data,
306         },
307 };
308 
309 /****************************************************************************
310  * GPIO Attached Keys
311  */
312 
313 static struct gpio_keys_button dns323ab_buttons[] = {
314         {
315                 .code           = KEY_RESTART,
316                 .gpio           = DNS323_GPIO_KEY_RESET,
317                 .desc           = "Reset Button",
318                 .active_low     = 1,
319         }, {
320                 .code           = KEY_POWER,
321                 .gpio           = DNS323_GPIO_KEY_POWER,
322                 .desc           = "Power Button",
323                 .active_low     = 1,
324         },
325 };
326 
327 static struct gpio_keys_platform_data dns323ab_button_data = {
328         .buttons        = dns323ab_buttons,
329         .nbuttons       = ARRAY_SIZE(dns323ab_buttons),
330 };
331 
332 static struct gpio_keys_button dns323c_buttons[] = {
333         {
334                 .code           = KEY_POWER,
335                 .gpio           = DNS323C_GPIO_KEY_POWER,
336                 .desc           = "Power Button",
337                 .active_low     = 1,
338         },
339 };
340 
341 static struct gpio_keys_platform_data dns323c_button_data = {
342         .buttons        = dns323c_buttons,
343         .nbuttons       = ARRAY_SIZE(dns323c_buttons),
344 };
345 
346 static struct platform_device dns323_button_device = {
347         .name           = "gpio-keys",
348         .id             = -1,
349         .num_resources  = 0,
350         .dev            = {
351                 .platform_data  = &dns323ab_button_data,
352         },
353 };
354 
355 /*****************************************************************************
356  * SATA
357  */
358 static struct mv_sata_platform_data dns323_sata_data = {
359        .n_ports        = 2,
360 };
361 
362 /****************************************************************************
363  * General Setup
364  */
365 static unsigned int dns323a_mpp_modes[] __initdata = {
366         MPP0_PCIE_RST_OUTn,
367         MPP1_GPIO,              /* right amber LED (sata ch0) */
368         MPP2_GPIO,              /* left amber LED (sata ch1) */
369         MPP3_UNUSED,
370         MPP4_GPIO,              /* power button LED */
371         MPP5_GPIO,              /* power button LED */
372         MPP6_GPIO,              /* GMT G751-2f overtemp */
373         MPP7_GPIO,              /* M41T80 nIRQ/OUT/SQW */
374         MPP8_GPIO,              /* triggers power off */
375         MPP9_GPIO,              /* power button switch */
376         MPP10_GPIO,             /* reset button switch */
377         MPP11_UNUSED,
378         MPP12_UNUSED,
379         MPP13_UNUSED,
380         MPP14_UNUSED,
381         MPP15_UNUSED,
382         MPP16_UNUSED,
383         MPP17_UNUSED,
384         MPP18_UNUSED,
385         MPP19_UNUSED,
386         0,
387 };
388 
389 static unsigned int dns323b_mpp_modes[] __initdata = {
390         MPP0_UNUSED,
391         MPP1_GPIO,              /* right amber LED (sata ch0) */
392         MPP2_GPIO,              /* left amber LED (sata ch1) */
393         MPP3_GPIO,              /* system up flag */
394         MPP4_GPIO,              /* power button LED */
395         MPP5_GPIO,              /* power button LED */
396         MPP6_GPIO,              /* GMT G751-2f overtemp */
397         MPP7_GPIO,              /* M41T80 nIRQ/OUT/SQW */
398         MPP8_GPIO,              /* triggers power off */
399         MPP9_GPIO,              /* power button switch */
400         MPP10_GPIO,             /* reset button switch */
401         MPP11_UNUSED,
402         MPP12_SATA_LED,
403         MPP13_SATA_LED,
404         MPP14_SATA_LED,
405         MPP15_SATA_LED,
406         MPP16_UNUSED,
407         MPP17_UNUSED,
408         MPP18_UNUSED,
409         MPP19_UNUSED,
410         0,
411 };
412 
413 static unsigned int dns323c_mpp_modes[] __initdata = {
414         MPP0_GPIO,              /* ? input */
415         MPP1_GPIO,              /* input power switch (0 = pressed) */
416         MPP2_GPIO,              /* output power off */
417         MPP3_UNUSED,            /* ? output */
418         MPP4_UNUSED,            /* ? output */
419         MPP5_UNUSED,            /* ? output */
420         MPP6_UNUSED,            /* ? output */
421         MPP7_UNUSED,            /* ? output */
422         MPP8_GPIO,              /* i/o right amber LED */
423         MPP9_GPIO,              /* i/o left amber LED */
424         MPP10_GPIO,             /* input */
425         MPP11_UNUSED,
426         MPP12_SATA_LED,
427         MPP13_SATA_LED,
428         MPP14_SATA_LED,
429         MPP15_SATA_LED,
430         MPP16_UNUSED,
431         MPP17_GPIO,             /* power button LED */
432         MPP18_GPIO,             /* fan speed bit 0 */
433         MPP19_GPIO,             /* fan speed bit 1 */
434         0,
435 };
436 
437 /* Rev C1 Fan speed notes:
438  *
439  * The fan is controlled by 2 GPIOs on this board. The settings
440  * of the bits is as follow:
441  *
442  *  GPIO 18    GPIO 19    Fan
443  *
444  *    0          0        stopped
445  *    0          1        low speed
446  *    1          0        high speed
447  *    1          1        don't do that (*)
448  *
449  * (*) I think the two bits control two feed-in resistors into a fixed
450  *     PWN circuit, setting both bits will basically go a 'bit' faster
451  *     than high speed, but d-link doesn't do it and you may get out of
452  *     HW spec so don't do it.
453  */
454 
455 /*
456  * On the DNS-323 A1 and B1 the following devices are attached via I2C:
457  *
458  *  i2c addr | chip        | description
459  *  0x3e     | GMT G760Af  | fan speed PWM controller
460  *  0x48     | GMT G751-2f | temp. sensor and therm. watchdog (LM75 compatible)
461  *  0x68     | ST M41T80   | RTC w/ alarm
462  */
463 static struct i2c_board_info __initdata dns323ab_i2c_devices[] = {
464         {
465                 I2C_BOARD_INFO("g760a", 0x3e),
466         }, {
467                 I2C_BOARD_INFO("lm75", 0x48),
468         }, {
469                 I2C_BOARD_INFO("m41t80", 0x68),
470         },
471 };
472 
473 /*
474  * On the DNS-323 C1 the following devices are attached via I2C:
475  *
476  *  i2c addr | chip        | description
477  *  0x48     | GMT G751-2f | temp. sensor and therm. watchdog (LM75 compatible)
478  *  0x68     | ST M41T80   | RTC w/ alarm
479  */
480 static struct i2c_board_info __initdata dns323c_i2c_devices[] = {
481         {
482                 I2C_BOARD_INFO("lm75", 0x48),
483         }, {
484                 I2C_BOARD_INFO("m41t80", 0x68),
485         },
486 };
487 
488 /* DNS-323 rev. A specific power off method */
489 static void dns323a_power_off(void)
490 {
491         pr_info("DNS-323: Triggering power-off...\n");
492         gpio_set_value(DNS323_GPIO_POWER_OFF, 1);
493 }
494 
495 /* DNS-323 rev B specific power off method */
496 static void dns323b_power_off(void)
497 {
498         pr_info("DNS-323: Triggering power-off...\n");
499         /* Pin has to be changed to 1 and back to 0 to do actual power off. */
500         gpio_set_value(DNS323_GPIO_POWER_OFF, 1);
501         mdelay(100);
502         gpio_set_value(DNS323_GPIO_POWER_OFF, 0);
503 }
504 
505 /* DNS-323 rev. C specific power off method */
506 static void dns323c_power_off(void)
507 {
508         pr_info("DNS-323: Triggering power-off...\n");
509         gpio_set_value(DNS323C_GPIO_POWER_OFF, 1);
510 }
511 
512 static int dns323c_phy_fixup(struct phy_device *phy)
513 {
514         phy->dev_flags |= MARVELL_PHY_M1118_DNS323_LEDS;
515 
516         return 0;
517 }
518 
519 static int __init dns323_identify_rev(void)
520 {
521         u32 dev, rev, i, reg;
522 
523         pr_debug("DNS-323: Identifying board ... \n");
524 
525         /* Rev A1 has a 5181 */
526         orion5x_pcie_id(&dev, &rev);
527         if (dev == MV88F5181_DEV_ID) {
528                 pr_debug("DNS-323: 5181 found, board is A1\n");
529                 return DNS323_REV_A1;
530         }
531         pr_debug("DNS-323: 5182 found, board is B1 or C1, checking PHY...\n");
532 
533         /* Rev B1 and C1 both have 5182, let's poke at the eth PHY. This is
534          * a bit gross but we want to do that without links into the eth
535          * driver so let's poke at it directly. We default to rev B1 in
536          * case the accesses fail
537          */
538 
539 #define ETH_SMI_REG             (ORION5X_ETH_VIRT_BASE + 0x2000 + 0x004)
540 #define  SMI_BUSY               0x10000000
541 #define  SMI_READ_VALID         0x08000000
542 #define  SMI_OPCODE_READ        0x04000000
543 #define  SMI_OPCODE_WRITE       0x00000000
544 
545         for (i = 0; i < 1000; i++) {
546                 reg = readl(ETH_SMI_REG);
547                 if (!(reg & SMI_BUSY))
548                         break;
549         }
550         if (i >= 1000) {
551                 pr_warn("DNS-323: Timeout accessing PHY, assuming rev B1\n");
552                 return DNS323_REV_B1;
553         }
554         writel((3 << 21)        /* phy ID reg */ |
555                (8 << 16)        /* phy addr */ |
556                SMI_OPCODE_READ, ETH_SMI_REG);
557         for (i = 0; i < 1000; i++) {
558                 reg = readl(ETH_SMI_REG);
559                 if (reg & SMI_READ_VALID)
560                         break;
561         }
562         if (i >= 1000) {
563                 pr_warn("DNS-323: Timeout reading PHY, assuming rev B1\n");
564                 return DNS323_REV_B1;
565         }
566         pr_debug("DNS-323: Ethernet PHY ID 0x%x\n", reg & 0xffff);
567 
568         /* Note: the Marvell tools mask the ID with 0x3f0 before comparison
569          * but I don't see that making a difference here, at least with
570          * any known Marvell PHY ID
571          */
572         switch(reg & 0xfff0) {
573         case 0x0cc0: /* MV88E1111 */
574                 return DNS323_REV_B1;
575         case 0x0e10: /* MV88E1118 */
576                 return DNS323_REV_C1;
577         default:
578                 pr_warn("DNS-323: Unknown PHY ID 0x%04x, assuming rev B1\n",
579                         reg & 0xffff);
580         }
581         return DNS323_REV_B1;
582 }
583 
584 static void __init dns323_init(void)
585 {
586         /* Setup basic Orion functions. Need to be called early. */
587         orion5x_init();
588 
589         /* Identify revision */
590         system_rev = dns323_identify_rev();
591         pr_info("DNS-323: Identified HW revision %c1\n", 'A' + system_rev);
592 
593         /* Just to be tricky, the 5182 has a completely different
594          * set of MPP modes to the 5181.
595          */
596         switch(system_rev) {
597         case DNS323_REV_A1:
598                 orion5x_mpp_conf(dns323a_mpp_modes);
599                 writel(0, MPP_DEV_CTRL);                /* DEV_D[31:16] */
600                 break;
601         case DNS323_REV_B1:
602                 orion5x_mpp_conf(dns323b_mpp_modes);
603                 break;
604         case DNS323_REV_C1:
605                 orion5x_mpp_conf(dns323c_mpp_modes);
606                 break;
607         }
608 
609         /* setup flash mapping
610          * CS3 holds a 8 MB Spansion S29GL064M90TFIR4
611          */
612         mvebu_mbus_add_window_by_id(ORION_MBUS_DEVBUS_BOOT_TARGET,
613                                     ORION_MBUS_DEVBUS_BOOT_ATTR,
614                                     DNS323_NOR_BOOT_BASE,
615                                     DNS323_NOR_BOOT_SIZE);
616         platform_device_register(&dns323_nor_flash);
617 
618         /* Sort out LEDs, Buttons and i2c devices */
619         switch(system_rev) {
620         case DNS323_REV_A1:
621                 /* The 5181 power LED is active low and requires
622                  * DNS323_GPIO_LED_POWER1 to also be low.
623                  */
624                  dns323ab_leds[0].active_low = 1;
625                  gpio_request(DNS323_GPIO_LED_POWER1, "Power Led Enable");
626                  gpio_direction_output(DNS323_GPIO_LED_POWER1, 0);
627                 /* Fall through */
628         case DNS323_REV_B1:
629                 i2c_register_board_info(0, dns323ab_i2c_devices,
630                                 ARRAY_SIZE(dns323ab_i2c_devices));
631                 break;
632         case DNS323_REV_C1:
633                 /* Hookup LEDs & Buttons */
634                 dns323_gpio_leds.dev.platform_data = &dns323c_led_data;
635                 dns323_button_device.dev.platform_data = &dns323c_button_data;
636 
637                 /* Hookup i2c devices and fan driver */
638                 i2c_register_board_info(0, dns323c_i2c_devices,
639                                 ARRAY_SIZE(dns323c_i2c_devices));
640                 platform_device_register_simple("dns323c-fan", 0, NULL, 0);
641 
642                 /* Register fixup for the PHY LEDs */
643                 if (!IS_BUILTIN(CONFIG_PHYLIB))
644                         break;
645                 phy_register_fixup_for_uid(MARVELL_PHY_ID_88E1118,
646                                            MARVELL_PHY_ID_MASK,
647                                            dns323c_phy_fixup);
648         }
649 
650         platform_device_register(&dns323_gpio_leds);
651         platform_device_register(&dns323_button_device);
652 
653         /*
654          * Configure peripherals.
655          */
656         if (dns323_read_mac_addr() < 0)
657                 printk("DNS-323: Failed to read MAC address\n");
658         orion5x_ehci0_init();
659         orion5x_eth_init(&dns323_eth_data);
660         orion5x_i2c_init();
661         orion5x_uart0_init();
662 
663         /* Remaining GPIOs */
664         switch(system_rev) {
665         case DNS323_REV_A1:
666                 /* Poweroff GPIO */
667                 if (gpio_request(DNS323_GPIO_POWER_OFF, "POWEROFF") != 0 ||
668                     gpio_direction_output(DNS323_GPIO_POWER_OFF, 0) != 0)
669                         pr_err("DNS-323: failed to setup power-off GPIO\n");
670                 pm_power_off = dns323a_power_off;
671                 break;
672         case DNS323_REV_B1:
673                 /* 5182 built-in SATA init */
674                 orion5x_sata_init(&dns323_sata_data);
675 
676                 /* The DNS323 rev B1 has flag to indicate the system is up.
677                  * Without this flag set, power LED will flash and cannot be
678                  * controlled via leds-gpio.
679                  */
680                 if (gpio_request(DNS323_GPIO_SYSTEM_UP, "SYS_READY") == 0)
681                         gpio_direction_output(DNS323_GPIO_SYSTEM_UP, 1);
682 
683                 /* Poweroff GPIO */
684                 if (gpio_request(DNS323_GPIO_POWER_OFF, "POWEROFF") != 0 ||
685                     gpio_direction_output(DNS323_GPIO_POWER_OFF, 0) != 0)
686                         pr_err("DNS-323: failed to setup power-off GPIO\n");
687                 pm_power_off = dns323b_power_off;
688                 break;
689         case DNS323_REV_C1:
690                 /* 5182 built-in SATA init */
691                 orion5x_sata_init(&dns323_sata_data);
692 
693                 /* Poweroff GPIO */
694                 if (gpio_request(DNS323C_GPIO_POWER_OFF, "POWEROFF") != 0 ||
695                     gpio_direction_output(DNS323C_GPIO_POWER_OFF, 0) != 0)
696                         pr_err("DNS-323: failed to setup power-off GPIO\n");
697                 pm_power_off = dns323c_power_off;
698 
699                 /* Now, -this- should theorically be done by the sata_mv driver
700                  * once I figure out what's going on there. Maybe the behaviour
701                  * of the LEDs should be somewhat passed via the platform_data.
702                  * for now, just whack the register and make the LEDs happy
703                  *
704                  * Note: AFAIK, rev B1 needs the same treatement but I'll let
705                  * somebody else test it.
706                  */
707                 writel(0x5, ORION5X_SATA_VIRT_BASE + 0x2c);
708                 break;
709         }
710 }
711 
712 /* Warning: D-Link uses a wrong mach-type (=526) in their bootloader */
713 MACHINE_START(DNS323, "D-Link DNS-323")
714         /* Maintainer: Herbert Valerio Riedel <hvr@gnu.org> */
715         .atag_offset    = 0x100,
716         .nr_irqs        = ORION5X_NR_IRQS,
717         .init_machine   = dns323_init,
718         .map_io         = orion5x_map_io,
719         .init_early     = orion5x_init_early,
720         .init_irq       = orion5x_init_irq,
721         .init_time      = orion5x_timer_init,
722         .fixup          = tag_fixup_mem32,
723         .restart        = orion5x_restart,
724 MACHINE_END
725 

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