cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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board-n8x0.c (12748B)


      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * linux/arch/arm/mach-omap2/board-n8x0.c
      4 *
      5 * Copyright (C) 2005-2009 Nokia Corporation
      6 * Author: Juha Yrjola <juha.yrjola@nokia.com>
      7 *
      8 * Modified from mach-omap2/board-generic.c
      9 */
     10
     11#include <linux/clk.h>
     12#include <linux/delay.h>
     13#include <linux/gpio.h>
     14#include <linux/init.h>
     15#include <linux/io.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>
     25#include <sound/tlv320aic3x.h>
     26
     27#include <asm/mach/arch.h>
     28#include <asm/mach-types.h>
     29
     30#include "common.h"
     31#include "mmc.h"
     32#include "soc.h"
     33#include "common-board-devices.h"
     34
     35#define TUSB6010_ASYNC_CS	1
     36#define TUSB6010_SYNC_CS	4
     37#define TUSB6010_GPIO_INT	58
     38#define TUSB6010_GPIO_ENABLE	0
     39#define TUSB6010_DMACHAN	0x3f
     40
     41#define NOKIA_N810_WIMAX	(1 << 2)
     42#define NOKIA_N810		(1 << 1)
     43#define NOKIA_N800		(1 << 0)
     44
     45static u32 board_caps;
     46
     47#define board_is_n800()		(board_caps & NOKIA_N800)
     48#define board_is_n810()		(board_caps & NOKIA_N810)
     49#define board_is_n810_wimax()	(board_caps & NOKIA_N810_WIMAX)
     50
     51static void board_check_revision(void)
     52{
     53	if (of_machine_is_compatible("nokia,n800"))
     54		board_caps = NOKIA_N800;
     55	else if (of_machine_is_compatible("nokia,n810"))
     56		board_caps = NOKIA_N810;
     57	else if (of_machine_is_compatible("nokia,n810-wimax"))
     58		board_caps = NOKIA_N810_WIMAX;
     59
     60	if (!board_caps)
     61		pr_err("Unknown board\n");
     62}
     63
     64#if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
     65/*
     66 * Enable or disable power to TUSB6010. When enabling, turn on 3.3 V and
     67 * 1.5 V voltage regulators of PM companion chip. Companion chip will then
     68 * provide then PGOOD signal to TUSB6010 which will release it from reset.
     69 */
     70static int tusb_set_power(int state)
     71{
     72	int i, retval = 0;
     73
     74	if (state) {
     75		gpio_set_value(TUSB6010_GPIO_ENABLE, 1);
     76		msleep(1);
     77
     78		/* Wait until TUSB6010 pulls INT pin down */
     79		i = 100;
     80		while (i && gpio_get_value(TUSB6010_GPIO_INT)) {
     81			msleep(1);
     82			i--;
     83		}
     84
     85		if (!i) {
     86			printk(KERN_ERR "tusb: powerup failed\n");
     87			retval = -ENODEV;
     88		}
     89	} else {
     90		gpio_set_value(TUSB6010_GPIO_ENABLE, 0);
     91		msleep(10);
     92	}
     93
     94	return retval;
     95}
     96
     97static struct musb_hdrc_config musb_config = {
     98	.multipoint	= 1,
     99	.dyn_fifo	= 1,
    100	.num_eps	= 16,
    101	.ram_bits	= 12,
    102};
    103
    104static struct musb_hdrc_platform_data tusb_data = {
    105	.mode		= MUSB_OTG,
    106	.set_power	= tusb_set_power,
    107	.min_power	= 25,	/* x2 = 50 mA drawn from VBUS as peripheral */
    108	.power		= 100,	/* Max 100 mA VBUS for host mode */
    109	.config		= &musb_config,
    110};
    111
    112static void __init n8x0_usb_init(void)
    113{
    114	int ret = 0;
    115	static const char announce[] __initconst = KERN_INFO "TUSB 6010\n";
    116
    117	/* PM companion chip power control pin */
    118	ret = gpio_request_one(TUSB6010_GPIO_ENABLE, GPIOF_OUT_INIT_LOW,
    119			       "TUSB6010 enable");
    120	if (ret != 0) {
    121		printk(KERN_ERR "Could not get TUSB power GPIO%i\n",
    122		       TUSB6010_GPIO_ENABLE);
    123		return;
    124	}
    125	tusb_set_power(0);
    126
    127	ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
    128					TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
    129					TUSB6010_GPIO_INT, TUSB6010_DMACHAN);
    130	if (ret != 0)
    131		goto err;
    132
    133	printk(announce);
    134
    135	return;
    136
    137err:
    138	gpio_free(TUSB6010_GPIO_ENABLE);
    139}
    140#else
    141
    142static void __init n8x0_usb_init(void) {}
    143
    144#endif /*CONFIG_USB_MUSB_TUSB6010 */
    145
    146
    147static struct omap2_mcspi_device_config p54spi_mcspi_config = {
    148	.turbo_mode	= 0,
    149};
    150
    151static struct spi_board_info n800_spi_board_info[] __initdata = {
    152	{
    153		.modalias	= "p54spi",
    154		.bus_num	= 2,
    155		.chip_select	= 0,
    156		.max_speed_hz   = 48000000,
    157		.controller_data = &p54spi_mcspi_config,
    158	},
    159};
    160
    161#if defined(CONFIG_MENELAUS) && IS_ENABLED(CONFIG_MMC_OMAP)
    162
    163/*
    164 * On both N800 and N810, only the first of the two MMC controllers is in use.
    165 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
    166 * On N800, both slots are powered via Menelaus. On N810, only one of the
    167 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
    168 *
    169 * VMMC				slot 1 on both N800 and N810
    170 * VDCDC3_APE and VMCS2_APE	slot 2 on N800
    171 * GPIO23 and GPIO9		slot 2 EMMC on N810
    172 *
    173 */
    174#define N8X0_SLOT_SWITCH_GPIO	96
    175#define N810_EMMC_VSD_GPIO	23
    176#define N810_EMMC_VIO_GPIO	9
    177
    178static int slot1_cover_open;
    179static int slot2_cover_open;
    180static struct device *mmc_device;
    181
    182static int n8x0_mmc_switch_slot(struct device *dev, int slot)
    183{
    184#ifdef CONFIG_MMC_DEBUG
    185	dev_dbg(dev, "Choose slot %d\n", slot + 1);
    186#endif
    187	gpio_set_value(N8X0_SLOT_SWITCH_GPIO, slot);
    188	return 0;
    189}
    190
    191static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
    192					int power_on, int vdd)
    193{
    194	int mV;
    195
    196#ifdef CONFIG_MMC_DEBUG
    197	dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
    198		power_on ? "on" : "off", vdd);
    199#endif
    200	if (slot == 0) {
    201		if (!power_on)
    202			return menelaus_set_vmmc(0);
    203		switch (1 << vdd) {
    204		case MMC_VDD_33_34:
    205		case MMC_VDD_32_33:
    206		case MMC_VDD_31_32:
    207			mV = 3100;
    208			break;
    209		case MMC_VDD_30_31:
    210			mV = 3000;
    211			break;
    212		case MMC_VDD_28_29:
    213			mV = 2800;
    214			break;
    215		case MMC_VDD_165_195:
    216			mV = 1850;
    217			break;
    218		default:
    219			BUG();
    220		}
    221		return menelaus_set_vmmc(mV);
    222	} else {
    223		if (!power_on)
    224			return menelaus_set_vdcdc(3, 0);
    225		switch (1 << vdd) {
    226		case MMC_VDD_33_34:
    227		case MMC_VDD_32_33:
    228			mV = 3300;
    229			break;
    230		case MMC_VDD_30_31:
    231		case MMC_VDD_29_30:
    232			mV = 3000;
    233			break;
    234		case MMC_VDD_28_29:
    235		case MMC_VDD_27_28:
    236			mV = 2800;
    237			break;
    238		case MMC_VDD_24_25:
    239		case MMC_VDD_23_24:
    240			mV = 2400;
    241			break;
    242		case MMC_VDD_22_23:
    243		case MMC_VDD_21_22:
    244			mV = 2200;
    245			break;
    246		case MMC_VDD_20_21:
    247			mV = 2000;
    248			break;
    249		case MMC_VDD_165_195:
    250			mV = 1800;
    251			break;
    252		default:
    253			BUG();
    254		}
    255		return menelaus_set_vdcdc(3, mV);
    256	}
    257	return 0;
    258}
    259
    260static void n810_set_power_emmc(struct device *dev,
    261					 int power_on)
    262{
    263	dev_dbg(dev, "Set EMMC power %s\n", power_on ? "on" : "off");
    264
    265	if (power_on) {
    266		gpio_set_value(N810_EMMC_VSD_GPIO, 1);
    267		msleep(1);
    268		gpio_set_value(N810_EMMC_VIO_GPIO, 1);
    269		msleep(1);
    270	} else {
    271		gpio_set_value(N810_EMMC_VIO_GPIO, 0);
    272		msleep(50);
    273		gpio_set_value(N810_EMMC_VSD_GPIO, 0);
    274		msleep(50);
    275	}
    276}
    277
    278static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
    279			      int vdd)
    280{
    281	if (board_is_n800() || slot == 0)
    282		return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
    283
    284	n810_set_power_emmc(dev, power_on);
    285
    286	return 0;
    287}
    288
    289static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
    290{
    291	int r;
    292
    293	dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
    294		bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
    295	BUG_ON(slot != 0 && slot != 1);
    296	slot++;
    297	switch (bus_mode) {
    298	case MMC_BUSMODE_OPENDRAIN:
    299		r = menelaus_set_mmc_opendrain(slot, 1);
    300		break;
    301	case MMC_BUSMODE_PUSHPULL:
    302		r = menelaus_set_mmc_opendrain(slot, 0);
    303		break;
    304	default:
    305		BUG();
    306	}
    307	if (r != 0 && printk_ratelimit())
    308		dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
    309			slot);
    310	return r;
    311}
    312
    313static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
    314{
    315	slot++;
    316	BUG_ON(slot != 1 && slot != 2);
    317	if (slot == 1)
    318		return slot1_cover_open;
    319	else
    320		return slot2_cover_open;
    321}
    322
    323static void n8x0_mmc_callback(void *data, u8 card_mask)
    324{
    325#ifdef CONFIG_MMC_OMAP
    326	int bit, *openp, index;
    327
    328	if (board_is_n800()) {
    329		bit = 1 << 1;
    330		openp = &slot2_cover_open;
    331		index = 1;
    332	} else {
    333		bit = 1;
    334		openp = &slot1_cover_open;
    335		index = 0;
    336	}
    337
    338	if (card_mask & bit)
    339		*openp = 1;
    340	else
    341		*openp = 0;
    342
    343	omap_mmc_notify_cover_event(mmc_device, index, *openp);
    344#else
    345	pr_warn("MMC: notify cover event not available\n");
    346#endif
    347}
    348
    349static int n8x0_mmc_late_init(struct device *dev)
    350{
    351	int r, bit, *openp;
    352	int vs2sel;
    353
    354	mmc_device = dev;
    355
    356	r = menelaus_set_slot_sel(1);
    357	if (r < 0)
    358		return r;
    359
    360	if (board_is_n800())
    361		vs2sel = 0;
    362	else
    363		vs2sel = 2;
    364
    365	r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
    366	if (r < 0)
    367		return r;
    368
    369	n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
    370	n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
    371
    372	r = menelaus_set_mmc_slot(1, 1, 0, 1);
    373	if (r < 0)
    374		return r;
    375	r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
    376	if (r < 0)
    377		return r;
    378
    379	r = menelaus_get_slot_pin_states();
    380	if (r < 0)
    381		return r;
    382
    383	if (board_is_n800()) {
    384		bit = 1 << 1;
    385		openp = &slot2_cover_open;
    386	} else {
    387		bit = 1;
    388		openp = &slot1_cover_open;
    389		slot2_cover_open = 0;
    390	}
    391
    392	/* All slot pin bits seem to be inversed until first switch change */
    393	if (r == 0xf || r == (0xf & ~bit))
    394		r = ~r;
    395
    396	if (r & bit)
    397		*openp = 1;
    398	else
    399		*openp = 0;
    400
    401	r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
    402
    403	return r;
    404}
    405
    406static void n8x0_mmc_shutdown(struct device *dev)
    407{
    408	int vs2sel;
    409
    410	if (board_is_n800())
    411		vs2sel = 0;
    412	else
    413		vs2sel = 2;
    414
    415	menelaus_set_mmc_slot(1, 0, 0, 0);
    416	menelaus_set_mmc_slot(2, 0, vs2sel, 0);
    417}
    418
    419static void n8x0_mmc_cleanup(struct device *dev)
    420{
    421	menelaus_unregister_mmc_callback();
    422
    423	gpio_free(N8X0_SLOT_SWITCH_GPIO);
    424
    425	if (board_is_n810()) {
    426		gpio_free(N810_EMMC_VSD_GPIO);
    427		gpio_free(N810_EMMC_VIO_GPIO);
    428	}
    429}
    430
    431/*
    432 * MMC controller1 has two slots that are multiplexed via I2C.
    433 * MMC controller2 is not in use.
    434 */
    435static struct omap_mmc_platform_data mmc1_data = {
    436	.nr_slots			= 0,
    437	.switch_slot			= n8x0_mmc_switch_slot,
    438	.init				= n8x0_mmc_late_init,
    439	.cleanup			= n8x0_mmc_cleanup,
    440	.shutdown			= n8x0_mmc_shutdown,
    441	.max_freq			= 24000000,
    442	.slots[0] = {
    443		.wires			= 4,
    444		.set_power		= n8x0_mmc_set_power,
    445		.set_bus_mode		= n8x0_mmc_set_bus_mode,
    446		.get_cover_state	= n8x0_mmc_get_cover_state,
    447		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_30_31 |
    448						MMC_VDD_32_33   | MMC_VDD_33_34,
    449		.name			= "internal",
    450	},
    451	.slots[1] = {
    452		.set_power		= n8x0_mmc_set_power,
    453		.set_bus_mode		= n8x0_mmc_set_bus_mode,
    454		.get_cover_state	= n8x0_mmc_get_cover_state,
    455		.ocr_mask		= MMC_VDD_165_195 | MMC_VDD_20_21 |
    456						MMC_VDD_21_22 | MMC_VDD_22_23 |
    457						MMC_VDD_23_24 | MMC_VDD_24_25 |
    458						MMC_VDD_27_28 | MMC_VDD_28_29 |
    459						MMC_VDD_29_30 | MMC_VDD_30_31 |
    460						MMC_VDD_32_33 | MMC_VDD_33_34,
    461		.name			= "external",
    462	},
    463};
    464
    465static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
    466
    467static struct gpio n810_emmc_gpios[] __initdata = {
    468	{ N810_EMMC_VSD_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vddf" },
    469	{ N810_EMMC_VIO_GPIO, GPIOF_OUT_INIT_LOW,  "MMC slot 2 Vdd"  },
    470};
    471
    472static void __init n8x0_mmc_init(void)
    473{
    474	int err;
    475
    476	if (board_is_n810()) {
    477		mmc1_data.slots[0].name = "external";
    478
    479		/*
    480		 * Some Samsung Movinand chips do not like open-ended
    481		 * multi-block reads and fall to braind-dead state
    482		 * while doing so. Reducing the number of blocks in
    483		 * the transfer or delays in clock disable do not help
    484		 */
    485		mmc1_data.slots[1].name = "internal";
    486		mmc1_data.slots[1].ban_openended = 1;
    487	}
    488
    489	err = gpio_request_one(N8X0_SLOT_SWITCH_GPIO, GPIOF_OUT_INIT_LOW,
    490			       "MMC slot switch");
    491	if (err)
    492		return;
    493
    494	if (board_is_n810()) {
    495		err = gpio_request_array(n810_emmc_gpios,
    496					 ARRAY_SIZE(n810_emmc_gpios));
    497		if (err) {
    498			gpio_free(N8X0_SLOT_SWITCH_GPIO);
    499			return;
    500		}
    501	}
    502
    503	mmc1_data.nr_slots = 2;
    504	mmc_data[0] = &mmc1_data;
    505}
    506#else
    507static struct omap_mmc_platform_data mmc1_data;
    508void __init n8x0_mmc_init(void)
    509{
    510}
    511#endif	/* CONFIG_MMC_OMAP */
    512
    513#ifdef CONFIG_MENELAUS
    514
    515static int n8x0_auto_sleep_regulators(void)
    516{
    517	u32 val;
    518	int ret;
    519
    520	val = EN_VPLL_SLEEP | EN_VMMC_SLEEP    \
    521		| EN_VAUX_SLEEP | EN_VIO_SLEEP \
    522		| EN_VMEM_SLEEP | EN_DC3_SLEEP \
    523		| EN_VC_SLEEP | EN_DC2_SLEEP;
    524
    525	ret = menelaus_set_regulator_sleep(1, val);
    526	if (ret < 0) {
    527		pr_err("Could not set regulators to sleep on menelaus: %u\n",
    528		       ret);
    529		return ret;
    530	}
    531	return 0;
    532}
    533
    534static int n8x0_auto_voltage_scale(void)
    535{
    536	int ret;
    537
    538	ret = menelaus_set_vcore_hw(1400, 1050);
    539	if (ret < 0) {
    540		pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
    541		return ret;
    542	}
    543	return 0;
    544}
    545
    546static int n8x0_menelaus_late_init(struct device *dev)
    547{
    548	int ret;
    549
    550	ret = n8x0_auto_voltage_scale();
    551	if (ret < 0)
    552		return ret;
    553	ret = n8x0_auto_sleep_regulators();
    554	if (ret < 0)
    555		return ret;
    556	return 0;
    557}
    558
    559#else
    560static int n8x0_menelaus_late_init(struct device *dev)
    561{
    562	return 0;
    563}
    564#endif
    565
    566struct menelaus_platform_data n8x0_menelaus_platform_data = {
    567	.late_init = n8x0_menelaus_late_init,
    568};
    569
    570struct aic3x_pdata n810_aic33_data = {
    571	.gpio_reset = 118,
    572};
    573
    574static int __init n8x0_late_initcall(void)
    575{
    576	if (!board_caps)
    577		return -ENODEV;
    578
    579	n8x0_mmc_init();
    580	n8x0_usb_init();
    581
    582	return 0;
    583}
    584omap_late_initcall(n8x0_late_initcall);
    585
    586/*
    587 * Legacy init pdata init for n8x0. Note that we want to follow the
    588 * I2C bus numbering starting at 0 for device tree like other omaps.
    589 */
    590void * __init n8x0_legacy_init(void)
    591{
    592	board_check_revision();
    593	spi_register_board_info(n800_spi_board_info,
    594				ARRAY_SIZE(n800_spi_board_info));
    595	return &mmc1_data;
    596}