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/machine.h>
14 #include <linux/gpio/consumer.h>
15 #include <linux/init.h>
16 #include <linux/io.h>
17 #include <linux/irq.h>
18 #include <linux/stddef.h>
19 #include <linux/i2c.h>
20 #include <linux/spi/spi.h>
21 #include <linux/usb/musb.h>
22 #include <linux/mmc/host.h>
23 #include <linux/platform_data/spi-omap2-mcspi.h>
24 #include <linux/platform_data/mmc-omap.h>
25 #include <linux/mfd/menelaus.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 "usb-tusb6010.h"
33 #include "soc.h"
34 #include "common-board-devices.h"
35
36 #define TUSB6010_ASYNC_CS 1
37 #define TUSB6010_SYNC_CS 4
38 #define TUSB6010_DMACHAN 0x3f
39
40 #define NOKIA_N810_WIMAX (1 << 2)
41 #define NOKIA_N810 (1 << 1)
42 #define NOKIA_N800 (1 << 0)
43
44 static u32 board_caps;
45
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)
49
board_check_revision(void)50 static void board_check_revision(void)
51 {
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;
58
59 if (!board_caps)
60 pr_err("Unknown board\n");
61 }
62
63 #if IS_ENABLED(CONFIG_USB_MUSB_TUSB6010)
64
65 static struct musb_hdrc_config musb_config = {
66 .multipoint = 1,
67 .dyn_fifo = 1,
68 .num_eps = 16,
69 .ram_bits = 12,
70 };
71
72 static struct musb_hdrc_platform_data tusb_data = {
73 .mode = MUSB_OTG,
74 .min_power = 25, /* x2 = 50 mA drawn from VBUS as peripheral */
75 .power = 100, /* Max 100 mA VBUS for host mode */
76 .config = &musb_config,
77 };
78
79 static struct gpiod_lookup_table tusb_gpio_table = {
80 .dev_id = "musb-tusb",
81 .table = {
82 GPIO_LOOKUP("gpio-0-31", 0, "enable", GPIO_ACTIVE_HIGH),
83 GPIO_LOOKUP("gpio-32-63", 26, "int", GPIO_ACTIVE_HIGH),
84 { }
85 },
86 };
87
n8x0_usb_init(void)88 static void __init n8x0_usb_init(void)
89 {
90 int ret = 0;
91
92 gpiod_add_lookup_table(&tusb_gpio_table);
93 ret = tusb6010_setup_interface(&tusb_data, TUSB6010_REFCLK_19, 2,
94 TUSB6010_ASYNC_CS, TUSB6010_SYNC_CS,
95 TUSB6010_DMACHAN);
96 if (ret != 0)
97 return;
98
99 pr_info("TUSB 6010\n");
100
101 return;
102 }
103 #else
104
n8x0_usb_init(void)105 static void __init n8x0_usb_init(void) {}
106
107 #endif /*CONFIG_USB_MUSB_TUSB6010 */
108
109
110 static struct omap2_mcspi_device_config p54spi_mcspi_config = {
111 .turbo_mode = 0,
112 };
113
114 static struct spi_board_info n800_spi_board_info[] __initdata = {
115 {
116 .modalias = "p54spi",
117 .bus_num = 2,
118 .chip_select = 0,
119 .max_speed_hz = 48000000,
120 .controller_data = &p54spi_mcspi_config,
121 },
122 };
123
124 #if defined(CONFIG_MENELAUS) && IS_ENABLED(CONFIG_MMC_OMAP)
125
126 /*
127 * On both N800 and N810, only the first of the two MMC controllers is in use.
128 * The two MMC slots are multiplexed via Menelaus companion chip over I2C.
129 * On N800, both slots are powered via Menelaus. On N810, only one of the
130 * slots is powered via Menelaus. The N810 EMMC is powered via GPIO.
131 *
132 * VMMC slot 1 on both N800 and N810
133 * VDCDC3_APE and VMCS2_APE slot 2 on N800
134 * GPIO23 and GPIO9 slot 2 EMMC on N810
135 *
136 */
137 static int slot1_cover_open;
138 static int slot2_cover_open;
139 static struct device *mmc_device;
140
141 static struct gpiod_lookup_table nokia800_mmc_gpio_table = {
142 .dev_id = "mmci-omap.0",
143 .table = {
144 /* Slot switch, GPIO 96 */
145 GPIO_LOOKUP("gpio-96-127", 0, "switch", GPIO_ACTIVE_HIGH),
146 { }
147 },
148 };
149
150 static struct gpiod_lookup_table nokia810_mmc_gpio_table = {
151 .dev_id = "mmci-omap.0",
152 .table = {
153 /* Slot switch, GPIO 96 */
154 GPIO_LOOKUP("gpio-96-127", 0, "switch", GPIO_ACTIVE_HIGH),
155 /* Slot index 1, VSD power, GPIO 23 */
156 GPIO_LOOKUP_IDX("gpio-0-31", 23, "vsd", 1, GPIO_ACTIVE_HIGH),
157 /* Slot index 1, VIO power, GPIO 9 */
158 GPIO_LOOKUP_IDX("gpio-0-31", 9, "vio", 1, GPIO_ACTIVE_HIGH),
159 { }
160 },
161 };
162
n8x0_mmc_set_power_menelaus(struct device * dev,int slot,int power_on,int vdd)163 static int n8x0_mmc_set_power_menelaus(struct device *dev, int slot,
164 int power_on, int vdd)
165 {
166 int mV;
167
168 #ifdef CONFIG_MMC_DEBUG
169 dev_dbg(dev, "Set slot %d power: %s (vdd %d)\n", slot + 1,
170 power_on ? "on" : "off", vdd);
171 #endif
172 if (slot == 0) {
173 if (!power_on)
174 return menelaus_set_vmmc(0);
175 switch (1 << vdd) {
176 case MMC_VDD_33_34:
177 case MMC_VDD_32_33:
178 case MMC_VDD_31_32:
179 mV = 3100;
180 break;
181 case MMC_VDD_30_31:
182 mV = 3000;
183 break;
184 case MMC_VDD_28_29:
185 mV = 2800;
186 break;
187 case MMC_VDD_165_195:
188 mV = 1850;
189 break;
190 default:
191 BUG();
192 }
193 return menelaus_set_vmmc(mV);
194 } else {
195 if (!power_on)
196 return menelaus_set_vdcdc(3, 0);
197 switch (1 << vdd) {
198 case MMC_VDD_33_34:
199 case MMC_VDD_32_33:
200 mV = 3300;
201 break;
202 case MMC_VDD_30_31:
203 case MMC_VDD_29_30:
204 mV = 3000;
205 break;
206 case MMC_VDD_28_29:
207 case MMC_VDD_27_28:
208 mV = 2800;
209 break;
210 case MMC_VDD_24_25:
211 case MMC_VDD_23_24:
212 mV = 2400;
213 break;
214 case MMC_VDD_22_23:
215 case MMC_VDD_21_22:
216 mV = 2200;
217 break;
218 case MMC_VDD_20_21:
219 mV = 2000;
220 break;
221 case MMC_VDD_165_195:
222 mV = 1800;
223 break;
224 default:
225 BUG();
226 }
227 return menelaus_set_vdcdc(3, mV);
228 }
229 return 0;
230 }
231
n8x0_mmc_set_power(struct device * dev,int slot,int power_on,int vdd)232 static int n8x0_mmc_set_power(struct device *dev, int slot, int power_on,
233 int vdd)
234 {
235 if (board_is_n800() || slot == 0)
236 return n8x0_mmc_set_power_menelaus(dev, slot, power_on, vdd);
237
238 /* The n810 power will be handled by GPIO code in the driver */
239
240 return 0;
241 }
242
n8x0_mmc_set_bus_mode(struct device * dev,int slot,int bus_mode)243 static int n8x0_mmc_set_bus_mode(struct device *dev, int slot, int bus_mode)
244 {
245 int r;
246
247 dev_dbg(dev, "Set slot %d bus mode %s\n", slot + 1,
248 bus_mode == MMC_BUSMODE_OPENDRAIN ? "open-drain" : "push-pull");
249 BUG_ON(slot != 0 && slot != 1);
250 slot++;
251 switch (bus_mode) {
252 case MMC_BUSMODE_OPENDRAIN:
253 r = menelaus_set_mmc_opendrain(slot, 1);
254 break;
255 case MMC_BUSMODE_PUSHPULL:
256 r = menelaus_set_mmc_opendrain(slot, 0);
257 break;
258 default:
259 BUG();
260 }
261 if (r != 0 && printk_ratelimit())
262 dev_err(dev, "MMC: unable to set bus mode for slot %d\n",
263 slot);
264 return r;
265 }
266
n8x0_mmc_get_cover_state(struct device * dev,int slot)267 static int n8x0_mmc_get_cover_state(struct device *dev, int slot)
268 {
269 slot++;
270 BUG_ON(slot != 1 && slot != 2);
271 if (slot == 1)
272 return slot1_cover_open;
273 else
274 return slot2_cover_open;
275 }
276
n8x0_mmc_callback(void * data,u8 card_mask)277 static void n8x0_mmc_callback(void *data, u8 card_mask)
278 {
279 #ifdef CONFIG_MMC_OMAP
280 int bit, *openp, index;
281
282 if (board_is_n800()) {
283 bit = 1 << 1;
284 openp = &slot2_cover_open;
285 index = 1;
286 } else {
287 bit = 1;
288 openp = &slot1_cover_open;
289 index = 0;
290 }
291
292 if (card_mask & bit)
293 *openp = 1;
294 else
295 *openp = 0;
296
297 omap_mmc_notify_cover_event(mmc_device, index, *openp);
298 #else
299 pr_warn("MMC: notify cover event not available\n");
300 #endif
301 }
302
n8x0_mmc_late_init(struct device * dev)303 static int n8x0_mmc_late_init(struct device *dev)
304 {
305 int r, bit, *openp;
306 int vs2sel;
307
308 mmc_device = dev;
309
310 r = menelaus_set_slot_sel(1);
311 if (r < 0)
312 return r;
313
314 if (board_is_n800())
315 vs2sel = 0;
316 else
317 vs2sel = 2;
318
319 r = menelaus_set_mmc_slot(2, 0, vs2sel, 1);
320 if (r < 0)
321 return r;
322
323 n8x0_mmc_set_power(dev, 0, MMC_POWER_ON, 16); /* MMC_VDD_28_29 */
324 n8x0_mmc_set_power(dev, 1, MMC_POWER_ON, 16);
325
326 r = menelaus_set_mmc_slot(1, 1, 0, 1);
327 if (r < 0)
328 return r;
329 r = menelaus_set_mmc_slot(2, 1, vs2sel, 1);
330 if (r < 0)
331 return r;
332
333 r = menelaus_get_slot_pin_states();
334 if (r < 0)
335 return r;
336
337 if (board_is_n800()) {
338 bit = 1 << 1;
339 openp = &slot2_cover_open;
340 } else {
341 bit = 1;
342 openp = &slot1_cover_open;
343 slot2_cover_open = 0;
344 }
345
346 /* All slot pin bits seem to be inversed until first switch change */
347 if (r == 0xf || r == (0xf & ~bit))
348 r = ~r;
349
350 if (r & bit)
351 *openp = 1;
352 else
353 *openp = 0;
354
355 r = menelaus_register_mmc_callback(n8x0_mmc_callback, NULL);
356
357 return r;
358 }
359
n8x0_mmc_shutdown(struct device * dev)360 static void n8x0_mmc_shutdown(struct device *dev)
361 {
362 int vs2sel;
363
364 if (board_is_n800())
365 vs2sel = 0;
366 else
367 vs2sel = 2;
368
369 menelaus_set_mmc_slot(1, 0, 0, 0);
370 menelaus_set_mmc_slot(2, 0, vs2sel, 0);
371 }
372
n8x0_mmc_cleanup(struct device * dev)373 static void n8x0_mmc_cleanup(struct device *dev)
374 {
375 menelaus_unregister_mmc_callback();
376 }
377
378 /*
379 * MMC controller1 has two slots that are multiplexed via I2C.
380 * MMC controller2 is not in use.
381 */
382 static struct omap_mmc_platform_data mmc1_data = {
383 .nr_slots = 0,
384 .init = n8x0_mmc_late_init,
385 .cleanup = n8x0_mmc_cleanup,
386 .shutdown = n8x0_mmc_shutdown,
387 .max_freq = 24000000,
388 .slots[0] = {
389 .wires = 4,
390 .set_power = n8x0_mmc_set_power,
391 .set_bus_mode = n8x0_mmc_set_bus_mode,
392 .get_cover_state = n8x0_mmc_get_cover_state,
393 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_30_31 |
394 MMC_VDD_32_33 | MMC_VDD_33_34,
395 .name = "internal",
396 },
397 .slots[1] = {
398 .set_power = n8x0_mmc_set_power,
399 .set_bus_mode = n8x0_mmc_set_bus_mode,
400 .get_cover_state = n8x0_mmc_get_cover_state,
401 .ocr_mask = MMC_VDD_165_195 | MMC_VDD_20_21 |
402 MMC_VDD_21_22 | MMC_VDD_22_23 |
403 MMC_VDD_23_24 | MMC_VDD_24_25 |
404 MMC_VDD_27_28 | MMC_VDD_28_29 |
405 MMC_VDD_29_30 | MMC_VDD_30_31 |
406 MMC_VDD_32_33 | MMC_VDD_33_34,
407 .name = "external",
408 },
409 };
410
411 static struct omap_mmc_platform_data *mmc_data[OMAP24XX_NR_MMC];
412
n8x0_mmc_init(void)413 static void __init n8x0_mmc_init(void)
414 {
415 if (board_is_n810()) {
416 mmc1_data.slots[0].name = "external";
417
418 /*
419 * Some Samsung Movinand chips do not like open-ended
420 * multi-block reads and fall to braind-dead state
421 * while doing so. Reducing the number of blocks in
422 * the transfer or delays in clock disable do not help
423 */
424 mmc1_data.slots[1].name = "internal";
425 mmc1_data.slots[1].ban_openended = 1;
426 gpiod_add_lookup_table(&nokia810_mmc_gpio_table);
427 } else {
428 gpiod_add_lookup_table(&nokia800_mmc_gpio_table);
429 }
430
431 mmc1_data.nr_slots = 2;
432 mmc_data[0] = &mmc1_data;
433 }
434 #else
435 static struct omap_mmc_platform_data mmc1_data;
n8x0_mmc_init(void)436 static void __init n8x0_mmc_init(void)
437 {
438 }
439 #endif /* CONFIG_MMC_OMAP */
440
441 #ifdef CONFIG_MENELAUS
442
n8x0_auto_sleep_regulators(void)443 static int n8x0_auto_sleep_regulators(void)
444 {
445 u32 val;
446 int ret;
447
448 val = EN_VPLL_SLEEP | EN_VMMC_SLEEP \
449 | EN_VAUX_SLEEP | EN_VIO_SLEEP \
450 | EN_VMEM_SLEEP | EN_DC3_SLEEP \
451 | EN_VC_SLEEP | EN_DC2_SLEEP;
452
453 ret = menelaus_set_regulator_sleep(1, val);
454 if (ret < 0) {
455 pr_err("Could not set regulators to sleep on menelaus: %u\n",
456 ret);
457 return ret;
458 }
459 return 0;
460 }
461
n8x0_auto_voltage_scale(void)462 static int n8x0_auto_voltage_scale(void)
463 {
464 int ret;
465
466 ret = menelaus_set_vcore_hw(1400, 1050);
467 if (ret < 0) {
468 pr_err("Could not set VCORE voltage on menelaus: %u\n", ret);
469 return ret;
470 }
471 return 0;
472 }
473
n8x0_menelaus_late_init(struct device * dev)474 static int n8x0_menelaus_late_init(struct device *dev)
475 {
476 int ret;
477
478 ret = n8x0_auto_voltage_scale();
479 if (ret < 0)
480 return ret;
481 ret = n8x0_auto_sleep_regulators();
482 if (ret < 0)
483 return ret;
484 return 0;
485 }
486
487 #else
n8x0_menelaus_late_init(struct device * dev)488 static int n8x0_menelaus_late_init(struct device *dev)
489 {
490 return 0;
491 }
492 #endif
493
494 struct menelaus_platform_data n8x0_menelaus_platform_data = {
495 .late_init = n8x0_menelaus_late_init,
496 };
497
n8x0_late_initcall(void)498 static int __init n8x0_late_initcall(void)
499 {
500 if (!board_caps)
501 return -ENODEV;
502
503 n8x0_mmc_init();
504 n8x0_usb_init();
505
506 return 0;
507 }
508 omap_late_initcall(n8x0_late_initcall);
509
510 /*
511 * Legacy init pdata init for n8x0. Note that we want to follow the
512 * I2C bus numbering starting at 0 for device tree like other omaps.
513 */
n8x0_legacy_init(void)514 void * __init n8x0_legacy_init(void)
515 {
516 board_check_revision();
517 spi_register_board_info(n800_spi_board_info,
518 ARRAY_SIZE(n800_spi_board_info));
519 return &mmc1_data;
520 }
521