Root/target/linux/ubicom32/files/arch/ubicom32/mach-ip7k/board-ip7145dpf.c

1/*
2 * arch/ubicom32/mach-ip7k/board-ip7145dpf.c
3 * Board file for IP7145DPF, rev 1.0, P/N 8007-0410
4 *
5 * (C) Copyright 2009, Ubicom, Inc.
6 *
7 * This file is part of the Ubicom32 Linux Kernel Port.
8 *
9 * The Ubicom32 Linux Kernel Port is free software: you can redistribute
10 * it and/or modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation, either version 2 of the
12 * License, or (at your option) any later version.
13 *
14 * The Ubicom32 Linux Kernel Port is distributed in the hope that it
15 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
16 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with the Ubicom32 Linux Kernel Port. If not,
21 * see <http://www.gnu.org/licenses/>.
22 *
23 * Ubicom32 implementation derived from (with many thanks):
24 * arch/m68knommu
25 * arch/blackfin
26 * arch/parisc
27 */
28#include <linux/device.h>
29#include <linux/platform_device.h>
30#include <linux/gpio.h>
31
32#include <linux/input.h>
33
34#include <linux/i2c.h>
35#include <linux/i2c-gpio.h>
36#include <linux/i2c/pca953x.h>
37
38#include <asm/board.h>
39#include <asm/machdep.h>
40#include <asm/ubicom32input.h>
41#include <asm/ubicom32input_i2c.h>
42#include <asm/ubicom32bl.h>
43#include <asm/ubicom32lcdpower.h>
44#include <asm/vdc_tio.h>
45
46#include <asm/ubicom32sd.h>
47#include <asm/sd_tio.h>
48#include <asm/devtree.h>
49#include <asm/audio.h>
50
51#include <asm/ring_tio.h>
52
53/******************************************************************************
54 * SD/IO Port F (Slot 1) platform data
55 */
56static struct resource ip7145dpf_portf_sd_resources[] = {
57    /*
58     * Send IRQ
59     */
60    [0] = {
61        /*
62         * The init routine will query the devtree and fill this in
63         */
64        .flags = IORESOURCE_IRQ,
65    },
66
67    /*
68     * Receive IRQ
69     */
70    [1] = {
71        /*
72         * The init routine will query the devtree and fill this in
73         */
74        .flags = IORESOURCE_IRQ,
75    },
76
77    /*
78     * Memory Mapped Registers
79     */
80    [2] = {
81        /*
82         * The init routine will query the devtree and fill this in
83         */
84        .flags = IORESOURCE_MEM,
85    },
86};
87
88static struct ubicom32sd_card ip7145dpf_portf_sd_cards[] = {
89    [0] = {
90        .pin_wp = IP7145DPF_IOB0,
91        .wp_polarity = 1,
92        .pin_pwr = IP7145DPF_IOB4,
93        .pin_cd = GPIO_RA_4,
94    },
95    [1] = {
96        .pin_wp = IP7145DPF_IOB1,
97        .wp_polarity = 1,
98        .pin_pwr = IP7145DPF_IOB5,
99        .pin_cd = GPIO_RA_6,
100    },
101};
102
103static struct ubicom32sd_platform_data ip7145dpf_portf_sd_platform_data = {
104    .ncards = 2,
105    .cards = ip7145dpf_portf_sd_cards,
106};
107
108static struct platform_device ip7145dpf_portf_sd_device = {
109    .name = "ubicom32sd",
110    .id = 0,
111    .resource = ip7145dpf_portf_sd_resources,
112    .num_resources = ARRAY_SIZE(ip7145dpf_portf_sd_resources),
113    .dev = {
114            .platform_data = &ip7145dpf_portf_sd_platform_data,
115    },
116
117};
118
119/*
120 * ip7145dpf_portf_sd_init
121 */
122static void ip7145dpf_portf_sd_init(void)
123{
124    /*
125     * Check the device tree for the sd_tio
126     */
127    struct sd_tio_node *sd_node = (struct sd_tio_node *)devtree_find_node("portf_sd");
128    if (!sd_node) {
129        printk(KERN_INFO "PortF SDTIO not found\n");
130        return;
131    }
132
133    /*
134     * Fill in the resources and platform data from devtree information
135     */
136    ip7145dpf_portf_sd_resources[0].start = sd_node->dn.sendirq;
137    ip7145dpf_portf_sd_resources[1].start = sd_node->dn.recvirq;
138    ip7145dpf_portf_sd_resources[2].start = (u32_t)&(sd_node->regs);
139    ip7145dpf_portf_sd_resources[2].end = (u32_t)&(sd_node->regs) + sizeof(sd_node->regs);
140
141    platform_device_register(&ip7145dpf_portf_sd_device);
142}
143
144/******************************************************************************
145 * SD/IO Port B (Slot 2) platform data
146 */
147static struct resource ip7145dpf_portb_sd_resources[] = {
148    /*
149     * Send IRQ
150     */
151    [0] = {
152        /*
153         * The init routine will query the devtree and fill this in
154         */
155        .flags = IORESOURCE_IRQ,
156    },
157
158    /*
159     * Receive IRQ
160     */
161    [1] = {
162        /*
163         * The init routine will query the devtree and fill this in
164         */
165        .flags = IORESOURCE_IRQ,
166    },
167
168    /*
169     * Memory Mapped Registers
170     */
171    [2] = {
172        /*
173         * The init routine will query the devtree and fill this in
174         */
175        .flags = IORESOURCE_MEM,
176    },
177};
178
179static struct ubicom32sd_card ip7145dpf_portb_sd_cards[] = {
180    [0] = {
181        .pin_wp = IP7145DPF_IOB2,
182        .wp_polarity = 1,
183        .pin_pwr = IP7145DPF_IOB6,
184        .pin_cd = IP7145DPF_IOB3,
185    },
186};
187
188static struct ubicom32sd_platform_data ip7145dpf_portb_sd_platform_data = {
189    .ncards = 1,
190    .cards = ip7145dpf_portb_sd_cards,
191};
192
193static struct platform_device ip7145dpf_portb_sd_device = {
194    .name = "ubicom32sd",
195    .id = 1,
196    .resource = ip7145dpf_portb_sd_resources,
197    .num_resources = ARRAY_SIZE(ip7145dpf_portb_sd_resources),
198    .dev = {
199            .platform_data = &ip7145dpf_portb_sd_platform_data,
200    },
201
202};
203
204/*
205 * ip7145dpf_portb_sd_init
206 */
207static void ip7145dpf_portb_sd_init(void)
208{
209    /*
210     * Check the device tree for the sd_tio
211     */
212    struct sd_tio_node *sd_node = (struct sd_tio_node *)devtree_find_node("portb_sd");
213    if (!sd_node) {
214        printk(KERN_INFO "PortB SDTIO not found\n");
215        return;
216    }
217
218    /*
219     * Fill in the resources and platform data from devtree information
220     */
221    ip7145dpf_portb_sd_resources[0].start = sd_node->dn.sendirq;
222    ip7145dpf_portb_sd_resources[1].start = sd_node->dn.recvirq;
223    ip7145dpf_portb_sd_resources[2].start = (u32_t)&(sd_node->regs);
224    ip7145dpf_portb_sd_resources[2].end = (u32_t)&(sd_node->regs) + sizeof(sd_node->regs);
225
226    platform_device_register(&ip7145dpf_portb_sd_device);
227}
228
229
230#ifdef IP7145DPF_USE_MMC_SPI
231/******************************************************************************
232 * SPI over GPIO (MMC_SPI)
233 */
234#include <linux/spi/spi.h>
235#include <linux/spi/mmc_spi.h>
236#include <linux/mmc/host.h>
237#include <asm/ubicom32-spi-gpio.h>
238
239#define MMC_CS GPIO_RF_5 // PF5 D3
240#define MMC_CD GPIO_RA_4 // PA4 CD
241#define MMC_WP IP7145DPF_IOB0 // IOB0 WP
242#define MMC_PWR IP7145DPF_IOB4 // IOB4 PWR
243
244/*
245 * SPI bus over GPIO (for SD card)
246 */
247static struct ubicom32_spi_gpio_platform_data ip7145dpf_spi_gpio_data = {
248    .pin_mosi = GPIO_RF_0, // PF0 CMD
249    .pin_miso = GPIO_RF_2, // PF2 D0
250    .pin_clk = GPIO_RF_1, // PF1 CLK
251    .bus_num = 0, // We'll call this SPI bus 0
252    .num_chipselect = 1, // only one device on this SPI bus
253};
254
255static struct platform_device ip7145dpf_spi_gpio_device = {
256    .name = "ubicom32-spi-gpio",
257    .id = 0,
258    .dev = {
259        .platform_data = &ip7145dpf_spi_gpio_data,
260    },
261};
262
263/*
264 * ip7145dpf_mmc_spi_setpower_slot_a
265 * Set the power state for slot A
266 */
267static void ip7145dpf_mmc_spi_setpower_slot_a(struct device *dev, unsigned int vdd)
268{
269    struct mmc_spi_platform_data *pd = dev->platform_data;
270
271    /*
272     * Power is inverted, we could tell the IOB to do it, but it's cleaner this way.
273     */
274    if ((1 << vdd) & pd->ocr_mask) {
275        gpio_set_value(MMC_PWR, 0);
276        return;
277    }
278    gpio_set_value(MMC_PWR, 1);
279}
280
281/*
282 * ip7145dpf_mmc_spi_get_cd_slot_a
283 * Get the CD bit for slot A
284 */
285static int ip7145dpf_mmc_spi_get_cd_slot_a(struct device *dev)
286{
287    /*
288     * Note that the sense of the GPIO is inverted
289     */
290    return !gpio_get_value(MMC_CD);
291}
292
293/*
294 * ip7145dpf_mmc_spi_get_ro_slot_a
295 * Get the WP bit for slot A
296 */
297static int ip7145dpf_mmc_spi_get_ro_slot_a(struct device *dev)
298{
299    /*
300     * Note that the sense of the GPIO is inverted, we could tell the IOB to do it, but
301     * it's clearer this way.
302     */
303    return !gpio_get_value(MMC_WP);
304}
305
306/*
307 * ip7145dpf_mmc_spi_exit_slot_a
308 * Free the appropriate GPIOs for slot A SD slot.
309 */
310static void ip7145dpf_mmc_spi_exit_slot_a(struct device *dev, void *appdata)
311{
312    gpio_free(MMC_CD);
313    gpio_free(MMC_CS);
314    gpio_free(MMC_WP);
315    gpio_free(MMC_PWR);
316    platform_device_unregister(&ip7145dpf_spi_gpio_device);
317}
318
319/*
320 * ip7145dpf_mmc_spi_init_slot_a
321 * Allocate the appropriate GPIOs for slot A SD slot.
322 * WP is on IOB0, CD is PA4, CS is on PF5
323 * TODO: make CD an interrupt
324 */
325static int ip7145dpf_mmc_spi_init_slot_a(void)
326{
327    int ret = gpio_request(MMC_CD, "mmc-a-cd");
328    if (ret) {
329        printk(KERN_ERR "%s: could not request mmc-a-cd pin\n", __FUNCTION__);
330        return -ENOSYS;
331    }
332    gpio_direction_input(MMC_CD);
333
334    ret = gpio_request(MMC_CS, "mmc-a-cs");
335    if (ret) {
336        printk(KERN_ERR "%s: could not request mmc-a-cs pin\n", __FUNCTION__);
337        goto no_cs;
338    }
339    gpio_direction_output(MMC_CS, 0);
340
341    ret = gpio_request(MMC_WP, "mmc-a-wp");
342    if (ret) {
343        printk(KERN_ERR "%s: could not request mmc-a-wp pin\n", __FUNCTION__);
344        goto no_wp;
345    }
346    gpio_direction_input(MMC_WP);
347
348    /*
349     * Start off with power off
350     */
351    ret = gpio_request(MMC_PWR, "mmc-a-pwr");
352    if (ret) {
353        printk(KERN_ERR "%s: could not request mmc-a-pwr pin\n", __FUNCTION__);
354        goto no_pwr;
355    }
356    ret = gpio_direction_output(MMC_PWR, 1);
357
358    return 0;
359
360no_pwr:
361    gpio_free(MMC_WP);
362
363no_wp:
364    gpio_free(MMC_CS);
365
366no_cs:
367    gpio_free(MMC_CD);
368    return -ENOSYS;
369}
370
371/*
372 * MMC_SPI driver (currently bitbang)
373 */
374static struct mmc_spi_platform_data ip7145dpf_mmc_platform_data = {
375    .ocr_mask = MMC_VDD_33_34,
376    .exit = ip7145dpf_mmc_spi_exit_slot_a,
377    .get_ro = ip7145dpf_mmc_spi_get_ro_slot_a,
378    .get_cd = ip7145dpf_mmc_spi_get_cd_slot_a,
379
380    .setpower = ip7145dpf_mmc_spi_setpower_slot_a,
381    .powerup_msecs = 500,
382
383    .detect_delay = 100,
384
385    .caps = MMC_CAP_NEEDS_POLL,
386};
387
388static struct ubicom32_spi_gpio_controller_data ip7145dpf_mmc_controller_data = {
389    .pin_cs = MMC_CS,
390};
391
392static struct spi_board_info ip7145dpf_spi_board_info[] = {
393    {
394        .modalias = "mmc_spi",
395        .bus_num = 0,
396        .chip_select = 0,
397        .max_speed_hz = 2000000,
398        .platform_data = &ip7145dpf_mmc_platform_data,
399        .controller_data = &ip7145dpf_mmc_controller_data,
400    }
401};
402#endif /* IP7145DPF_USE_MMC_SPI */
403
404/*
405 * ip7145dpf_u72_setup
406 * Called by I2C to tell us that u72 is setup.
407 *
408 * This function is called by I2C to tell us that u72 has been setup. All
409 * devices which rely on this chip being initialized (or even present) need to
410 * be initialized in this function otherwise they may get initialized too early.
411 *
412 * Currently the only device depending on u72 is the SPI
413 */
414static int __init ip7145dpf_u72_setup(struct i2c_client *client, unsigned gpio, unsigned ngpio, void *context)
415{
416#ifdef IP7145DPF_USE_MMC_SPI
417    if (ip7145dpf_mmc_spi_init_slot_a()) {
418        printk(KERN_ERR "%s: could not request mmc resources\n", __FUNCTION__);
419    } else {
420        printk(KERN_INFO "%s: registering SPI resources\n", __FUNCTION__);
421        spi_register_board_info(ip7145dpf_spi_board_info, ARRAY_SIZE(ip7145dpf_spi_board_info));
422        platform_device_register(&ip7145dpf_spi_gpio_device);
423    }
424#else
425    /*
426     * Initialize the Port F/Port B SD slots
427     */
428    ip7145dpf_portf_sd_init();
429    ip7145dpf_portb_sd_init();
430#endif
431    return 0;
432}
433
434/******************************************************************************
435 * LCD VGH on the board at PE6
436 */
437static struct ubicom32lcdpower_platform_data ip7145dpf_lcdpower_data = {
438    .vgh_gpio = GPIO_RE_6,
439    .vgh_polarity = true,
440};
441
442static struct platform_device ip7145dpf_lcdpower_device = {
443    .name = "ubicom32lcdpower",
444    .id = -1,
445    .dev = {
446        .platform_data = &ip7145dpf_lcdpower_data,
447    },
448};
449
450/******************************************************************************
451 * Backlight on the board PD0, hardware PWM
452 */
453static struct ubicom32bl_platform_data ip7145dpf_backlight_data = {
454    .type = UBICOM32BL_TYPE_PWM,
455    .pwm_channel = 2,
456    .pwm_prescale = 15,
457    .pwm_period = 60,
458    .default_intensity = 0x80,
459};
460
461static struct platform_device ip7145dpf_backlight_device = {
462    .name = "ubicom32bl",
463    .id = -1,
464    .dev = {
465        .platform_data = &ip7145dpf_backlight_data,
466    },
467};
468
469/******************************************************************************
470 * Ubicom32Input on I2C, U48 MAX7310, address 0x18, 8 bits
471 */
472static struct ubicom32input_i2c_button ip7145dpf_ubicom32input_i2c_u48_buttons[] = {
473    {
474        .type = EV_KEY,
475        .code = KEY_UP,
476        .bit = 0,
477        .active_low = 1,
478    },
479    {
480        .type = EV_KEY,
481        .code = KEY_LEFT,
482        .bit = 1,
483        .active_low = 1,
484    },
485    {
486        .type = EV_KEY,
487        .code = KEY_RIGHT,
488        .bit = 2,
489        .active_low = 1,
490    },
491    {
492        .type = EV_KEY,
493        .code = KEY_DOWN,
494        .bit = 3,
495        .active_low = 1,
496    },
497    {
498        .type = EV_KEY,
499        .code = KEY_ENTER,
500        .bit = 4,
501        .active_low = 1,
502    },
503    {
504        .type = EV_KEY,
505        .code = KEY_MENU,
506        .bit = 5,
507        .active_low = 1,
508    },
509    {
510        .type = EV_KEY,
511        .code = KEY_ESC,
512        .bit = 6,
513        .active_low = 1,
514    },
515};
516
517static struct ubicom32input_i2c_platform_data ip7145dpf_ubicom32input_i2c_u48_platform_data = {
518    .buttons = ip7145dpf_ubicom32input_i2c_u48_buttons,
519    .nbuttons = ARRAY_SIZE(ip7145dpf_ubicom32input_i2c_u48_buttons),
520    .name = "Ubicom32 Input I2C U48",
521};
522
523/******************************************************************************
524 * Additional GPIO chips
525 */
526static struct pca953x_platform_data ip7145dpf_gpio_u72_platform_data = {
527    .gpio_base = IP7145DPF_U72_BASE,
528    .setup = ip7145dpf_u72_setup,
529};
530
531/******************************************************************************
532 * Devices on the I2C bus
533 */
534static struct i2c_board_info __initdata ip7145dpf_i2c_board_info[] = {
535    /*
536     * U51, S35390A RTC, address 0x30
537     */
538    {
539        .type = "s35390a",
540        .addr = 0x30,
541    },
542
543    /*
544     * U48, MAX7310 IO expander, 8 bits, address 0x18
545     */
546    {
547        .type = "ubicom32in_max7310",
548        .addr = 0x18,
549        .platform_data = &ip7145dpf_ubicom32input_i2c_u48_platform_data,
550    },
551
552    /*
553     * U72, MAX7310 IOB expander, 8 bits, address 0x19
554     */
555    {
556        .type = "max7310",
557        .addr = 0x19,
558        .platform_data = &ip7145dpf_gpio_u72_platform_data,
559    },
560};
561
562/*
563 * I2C bus on the board, SDA PE1, SCL PE2
564 */
565static struct i2c_gpio_platform_data ip7145dpf_i2c_data = {
566    .sda_pin = GPIO_RE_1,
567    .scl_pin = GPIO_RE_2,
568    .sda_is_open_drain = 0,
569    .scl_is_open_drain = 0,
570};
571
572static struct platform_device ip7145dpf_i2c_device = {
573    .name = "i2c-gpio",
574    .id = 0,
575    .dev = {
576        .platform_data = &ip7145dpf_i2c_data,
577    },
578};
579
580/******************************************************************************
581 * Use ubicom32input driver to monitor the various pushbuttons on this board.
582 *
583 * WPS PF12
584 * FACT_DEFAULT PF13
585 * POWER PE4
586 *
587 * Not sutable for the keypad buttons since those run on I2C GPIO. The polling
588 * of ubicom32input would seem to be excessive for this.
589 *
590 * TODO: pick some ubicom understood EV_xxx define for WPS and Fact Default
591 */
592static struct ubicom32input_button ip7145dpf_ubicom32input_buttons[] = {
593    {
594        .type = EV_KEY,
595        .code = KEY_FN_F1,
596        .gpio = GPIO_RF_12,
597        .desc = "WPS",
598        .active_low = 1,
599    },
600    {
601        .type = EV_KEY,
602        .code = KEY_FN_F2,
603        .gpio = GPIO_RF_13,
604        .desc = "Factory Default",
605        .active_low = 1,
606    },
607    {
608        .type = EV_KEY,
609        .code = KEY_POWER,
610        .gpio = GPIO_RE_4,
611        .desc = "Power",
612        .active_low = 1,
613    },
614};
615
616static struct ubicom32input_platform_data ip7145dpf_ubicom32input_data = {
617    .buttons = ip7145dpf_ubicom32input_buttons,
618    .nbuttons = ARRAY_SIZE(ip7145dpf_ubicom32input_buttons),
619};
620
621static struct platform_device ip7145dpf_ubicom32input_device = {
622    .name = "ubicom32input",
623    .id = -1,
624    .dev = {
625        .platform_data = &ip7145dpf_ubicom32input_data,
626    },
627};
628
629/*
630 * List of all devices in our system
631 */
632static struct platform_device *ip7145dpf_devices[] __initdata = {
633    &ip7145dpf_i2c_device,
634    &ip7145dpf_lcdpower_device,
635    &ip7145dpf_backlight_device,
636    &ip7145dpf_ubicom32input_device,
637};
638
639/*
640 * ip7145dpf_power_off
641 * Called to turn the power off for this board
642 */
643static void ip7145dpf_power_off(void)
644{
645    gpio_set_value(GPIO_RE_5, 0);
646}
647
648/*
649 * ip7145dpf_init
650 * Called to add the devices which we have on this board
651 */
652static int __init ip7145dpf_init(void)
653{
654    int ret;
655    struct platform_device *audio_dev;
656
657    ubi_gpio_init();
658
659#ifdef CONFIG_UIO_UBICOM32RING
660    ring_tio_init("decoder_ring");
661#endif
662
663    /*
664     * Start up the video driver first
665     */
666    vdc_tio_init();
667
668    /*
669     * Take over holding of the power from the system
670     */
671    ret = gpio_request(GPIO_RE_5, "power_hold");
672    if (ret) {
673        printk(KERN_ERR "%s: could not request power hold GPIO\n", __FUNCTION__);
674    }
675    gpio_direction_output(GPIO_RE_5, 1);
676    mach_power_off = ip7145dpf_power_off;
677
678    /*
679     * USB SEL_HOST_USB line
680     */
681    ret = gpio_request(GPIO_RF_11, "SEL_HOST_USB");
682    if (ret) {
683        printk(KERN_ERR "%s: could not request SEL_HOST_USB GPIO\n", __FUNCTION__);
684    }
685    gpio_direction_output(GPIO_RF_11, 0);
686
687    /*
688     * Setup audio
689     */
690    audio_dev = audio_device_alloc("snd-ubi32-generic", "audio", "audio-i2sout", 0);
691    if (audio_dev) {
692        platform_device_register(audio_dev);
693    }
694
695    /*
696     * Register all of the devices we have on this board
697     */
698    printk(KERN_INFO "%s: registering device resources\n", __FUNCTION__);
699    platform_add_devices(ip7145dpf_devices, ARRAY_SIZE(ip7145dpf_devices));
700
701    /*
702     * Register all of the devices which sit on the I2C bus
703     */
704    printk(KERN_INFO "%s: registering i2c resources\n", __FUNCTION__);
705    i2c_register_board_info(0, ip7145dpf_i2c_board_info, ARRAY_SIZE(ip7145dpf_i2c_board_info));
706
707    /*
708     * We have to initialize the SPI after the I2C IOB gets setup. SPI is initialized in
709     * ip7145dpf_u72_setup
710     */
711
712    return 0;
713}
714
715arch_initcall(ip7145dpf_init);
716

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