1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-omap2/board-n8x0.c
5 * Copyright (C) 2005-2009 Nokia Corporation
6 * Author: Juha Yrjola <juha.yrjola@nokia.com>
8 * Modified from mach-omap2/board-generic.c
11 #include <linux/clk.h>
12 #include <linux/delay.h>
13 #include <linux/gpio.h>
14 #include <linux/init.h>
16 #include <linux/irq.h>
17 #include <linux/stddef.h>
18 #include <linux/i2c.h>
19 #include <linux/spi/spi.h>
20 #include <linux/usb/musb.h>
21 #include <linux/mmc/host.h>
22 #include <linux/platform_data/spi-omap2-mcspi.h>
23 #include <linux/platform_data/mmc-omap.h>
24 #include <linux/mfd/menelaus.h>
26 #include <asm/mach/arch.h>
27 #include <asm/mach-types.h>
32 #include "common-board-devices.h"
34 #define TUSB6010_ASYNC_CS 1
35 #define TUSB6010_SYNC_CS 4
36 #define TUSB6010_GPIO_INT 58
37 #define TUSB6010_GPIO_ENABLE 0
38 #define TUSB6010_DMACHAN 0x3f
40 #define NOKIA_N810_WIMAX (1 << 2)
41 #define NOKIA_N810 (1 << 1)
42 #define NOKIA_N800 (1 << 0)
44 static u32 board_caps;
46 #define board_is_n800() (board_caps & NOKIA_N800)
47 #define board_is_n810() (board_caps & NOKIA_N810)
48 #define board_is_n810_wimax() (board_caps & NOKIA_N810_WIMAX)
50 static void board_check_revision(void)
52 if (of_machine_is_compatible("nokia,n800"))
53 board_caps = NOKIA_N800;
54 else if (of_machine_is_compatible("nokia,n810"))
55 board_caps = NOKIA_N810;
56 else if (of_machine_is_compatible("nokia,n810-wimax"))
57 board_caps = NOKIA_N810_WIMAX;
60 pr_err("Unknown board\n");
63 #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
65 * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
66 * 1.5 V voltage regulators of PM companion chip. Companion chip will then
67 * provide then PGOOD signal to TUSB6010 which will release it from reset.
69 static int tusb_set_power(int state)
74 gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
77 /* Wait until TUSB6010 pulls INT pin down */
79 while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
85 printk(KERN_ERR "tusb: powerup failed\n");
89 gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
96 static struct musb_hdrc_config musb_config = {
103 static struct musb_hdrc_platform_data tusb_data = {
105 .set_power = tusb_set_power,
106 .min_power = 25, /* x2 = 50 mA drawn from VBUS as peripheral */
107 .power = 100, /* Max 100 mA VBUS for host mode */
108 .config = &musb_config,
111 static void __init n8x0_usb_init(void)
114 static const char announce[] __initconst = KERN_INFO "TUSB 6010\n";
116 /* PM companion chip power control pin */
117 ret = gpio_request_one(TUSB6010_GPIO_ENABLE, GPIOF_OUT_INIT_LOW,
120 printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
121 TUSB6010_GPIO_ENABLE);
126 ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
127 TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
128 TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
137 gpio_free(TUSB6010_GPIO_ENABLE);
141 static void __init n8x0_usb_init(void) {}
143 #endif /*CONFIG_USB_MUSB_TUSB6010 */
146 static struct omap2_mcspi_device_config p54spi_mcspi_config = {
150 static struct spi_board_info n800_spi_board_info[] __initdata = {
152 .modalias = "p54spi",
155 .max_speed_hz = 48000000,
156 .controller_data = &p54spi_mcspi_config,
160 #if defined(CONFIG_MENELAUS) && IS_ENABLED(CONFIG_MMC_OMAP)
163 * On both N800 and N810, only the first of the two MMC controllers is in use.
164 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
165 * On N800, both slots are powered via Menelaus. On N810, only one of the
166 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
168 * VMMC slot 1 on both N800 and N810
169 * VDCDC3_APE and VMCS2_APE slot 2 on N800
170 * GPIO23 and GPIO9 slot 2 EMMC on N810
173 #define N8X0_SLOT_SWITCH_GPIO 96
174 #define N810_EMMC_VSD_GPIO 23
175 #define N810_EMMC_VIO_GPIO 9
177 static int slot1_cover_open;
178 static int slot2_cover_open;
179 static struct device *mmc_device;
181 static int n8x0_mmc_switch_slot(struct device *dev, int slot)
183 #ifdef CONFIG_MMC_DEBUG
184 dev_dbg(dev, "Choose slot %d\n", slot + 1);
186 gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
190 static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
191 int power_on, int vdd)
195 #ifdef CONFIG_MMC_DEBUG
196 dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
197 power_on ? "on" : "off", vdd);
201 return menelaus_set_vmmc(0);
214 case MMC_VDD_165_195:
220 return menelaus_set_vmmc(mV);
223 return menelaus_set_vdcdc(3, 0);
248 case MMC_VDD_165_195:
254 return menelaus_set_vdcdc(3, mV);
259 static void n810_set_power_emmc(struct device *dev,
262 dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");
265 gpio_set_value(N810_EMMC_VSD_GPIO, 1);
267 gpio_set_value(N810_EMMC_VIO_GPIO, 1);
270 gpio_set_value(N810_EMMC_VIO_GPIO, 0);
272 gpio_set_value(N810_EMMC_VSD_GPIO, 0);
277 static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
280 if (board_is_n800() || slot == 0)
281 return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
283 n810_set_power_emmc(dev, power_on);
288 static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
292 dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
293 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
294 BUG_ON(slot != 0 && slot != 1);
297 case MMC_BUSMODE_OPENDRAIN:
298 r = menelaus_set_mmc_opendrain(slot, 1);
300 case MMC_BUSMODE_PUSHPULL:
301 r = menelaus_set_mmc_opendrain(slot, 0);
306 if (r != 0 && printk_ratelimit())
307 dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
312 static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
315 BUG_ON(slot != 1 && slot != 2);
317 return slot1_cover_open;
319 return slot2_cover_open;
322 static void n8x0_mmc_callback(void *data, u8 card_mask)
324 #ifdef CONFIG_MMC_OMAP
325 int bit, *openp, index;
327 if (board_is_n800()) {
329 openp = &slot2_cover_open;
333 openp = &slot1_cover_open;
342 omap_mmc_notify_cover_event(mmc_device, index, *openp);
344 pr_warn("MMC: notify cover event not available\n");
348 static int n8x0_mmc_late_init(struct device *dev)
355 r = menelaus_set_slot_sel(1);
364 r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
368 n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
369 n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
371 r = menelaus_set_mmc_slot(1, 1, 0, 1);
374 r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
378 r = menelaus_get_slot_pin_states();
382 if (board_is_n800()) {
384 openp = &slot2_cover_open;
387 openp = &slot1_cover_open;
388 slot2_cover_open = 0;
391 /* All slot pin bits seem to be inversed until first switch change */
392 if (r == 0xf || r == (0xf & ~bit))
400 r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
405 static void n8x0_mmc_shutdown(struct device *dev)
414 menelaus_set_mmc_slot(1, 0, 0, 0);
415 menelaus_set_mmc_slot(2, 0, vs2sel, 0);
418 static void n8x0_mmc_cleanup(struct device *dev)
420 menelaus_unregister_mmc_callback();
422 gpio_free(N8X0_SLOT_SWITCH_GPIO);
424 if (board_is_n810()) {
425 gpio_free(N810_EMMC_VSD_GPIO);
426 gpio_free(N810_EMMC_VIO_GPIO);
431 * MMC controller1 has two slots that are multiplexed via I2C.
432 * MMC controller2 is not in use.
434 static struct omap_mmc_platform_data mmc1_data = {
436 .switch_slot = n8x0_mmc_switch_slot,
437 .init = n8x0_mmc_late_init,
438 .cleanup = n8x0_mmc_cleanup,
439 .shutdown = n8x0_mmc_shutdown,
440 .max_freq = 24000000,
443 .set_power = n8x0_mmc_set_power,
444 .set_bus_mode = n8x0_mmc_set_bus_mode,
445 .get_cover_state = n8x0_mmc_get_cover_state,
446 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_30_31 |
447 MMC_VDD_32_33 | MMC_VDD_33_34,
451 .set_power = n8x0_mmc_set_power,
452 .set_bus_mode = n8x0_mmc_set_bus_mode,
453 .get_cover_state = n8x0_mmc_get_cover_state,
454 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_20_21 |
455 MMC_VDD_21_22 | MMC_VDD_22_23 |
456 MMC_VDD_23_24 | MMC_VDD_24_25 |
457 MMC_VDD_27_28 | MMC_VDD_28_29 |
458 MMC_VDD_29_30 | MMC_VDD_30_31 |
459 MMC_VDD_32_33 | MMC_VDD_33_34,
464 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
466 static struct gpio n810_emmc_gpios[] __initdata = {
467 { N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW, "MMC slot 2 Vddf" },
468 { N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW, "MMC slot 2 Vdd" },
471 static void __init n8x0_mmc_init(void)
475 if (board_is_n810()) {
476 mmc1_data.slots[0].name = "external";
479 * Some Samsung Movinand chips do not like open-ended
480 * multi-block reads and fall to braind-dead state
481 * while doing so. Reducing the number of blocks in
482 * the transfer or delays in clock disable do not help
484 mmc1_data.slots[1].name = "internal";
485 mmc1_data.slots[1].ban_openended = 1;
488 err = gpio_request_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
493 if (board_is_n810()) {
494 err = gpio_request_array(n810_emmc_gpios,
495 ARRAY_SIZE(n810_emmc_gpios));
497 gpio_free(N8X0_SLOT_SWITCH_GPIO);
502 mmc1_data.nr_slots = 2;
503 mmc_data[0] = &mmc1_data;
506 static struct omap_mmc_platform_data mmc1_data;
507 void __init n8x0_mmc_init(void)
510 #endif /* CONFIG_MMC_OMAP */
512 #ifdef CONFIG_MENELAUS
514 static int n8x0_auto_sleep_regulators(void)
519 val = EN_VPLL_SLEEP | EN_VMMC_SLEEP \
520 | EN_VAUX_SLEEP | EN_VIO_SLEEP \
521 | EN_VMEM_SLEEP | EN_DC3_SLEEP \
522 | EN_VC_SLEEP | EN_DC2_SLEEP;
524 ret = menelaus_set_regulator_sleep(1, val);
526 pr_err("Could not set regulators to sleep on menelaus: %u\n",
533 static int n8x0_auto_voltage_scale(void)
537 ret = menelaus_set_vcore_hw(1400, 1050);
539 pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
545 static int n8x0_menelaus_late_init(struct device *dev)
549 ret = n8x0_auto_voltage_scale();
552 ret = n8x0_auto_sleep_regulators();
559 static int n8x0_menelaus_late_init(struct device *dev)
565 struct menelaus_platform_data n8x0_menelaus_platform_data = {
566 .late_init = n8x0_menelaus_late_init,
569 static int __init n8x0_late_initcall(void)
579 omap_late_initcall(n8x0_late_initcall);
582 * Legacy init pdata init for n8x0. Note that we want to follow the
583 * I2C bus numbering starting at 0 for device tree like other omaps.
585 void * __init n8x0_legacy_init(void)
587 board_check_revision();
588 spi_register_board_info(n800_spi_board_info,
589 ARRAY_SIZE(n800_spi_board_info));