2 * linux/arch/arm/mach-omap2/hsmmc.c
4 * Copyright (C) 2007-2008 Texas Instruments
5 * Copyright (C) 2008 Nokia Corporation
6 * Author: Texas Instruments
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
12 #include <linux/kernel.h>
13 #include <linux/slab.h>
14 #include <linux/string.h>
15 #include <linux/delay.h>
16 #include <linux/gpio.h>
17 #include <mach/hardware.h>
19 #include <plat/omap-pm.h>
21 #include <plat/omap_device.h>
27 #if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
29 static u16 control_pbias_offset;
30 static u16 control_devconf1_offset;
31 static u16 control_mmc1;
33 #define HSMMC_NAME_LEN 9
35 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
37 static int hsmmc_get_context_loss(struct device *dev)
39 return omap_pm_get_dev_context_loss_count(dev);
43 #define hsmmc_get_context_loss NULL
46 static void omap_hsmmc1_before_set_reg(struct device *dev, int slot,
47 int power_on, int vdd)
50 struct omap_mmc_platform_data *mmc = dev->platform_data;
52 if (mmc->slots[0].remux)
53 mmc->slots[0].remux(dev, slot, power_on);
56 * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
57 * card with Vcc regulator (from twl4030 or whatever). OMAP has both
58 * 1.8V and 3.0V modes, controlled by the PBIAS register.
60 * In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which
61 * is most naturally TWL VSIM; those pins also use PBIAS.
63 * FIXME handle VMMC1A as needed ...
66 if (cpu_is_omap2430()) {
67 reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1);
68 if ((1 << vdd) >= MMC_VDD_30_31)
69 reg |= OMAP243X_MMC1_ACTIVE_OVERWRITE;
71 reg &= ~OMAP243X_MMC1_ACTIVE_OVERWRITE;
72 omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1);
75 if (mmc->slots[0].internal_clock) {
76 reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
77 reg |= OMAP2_MMCSDIO1ADPCLKISEL;
78 omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0);
81 reg = omap_ctrl_readl(control_pbias_offset);
82 if (cpu_is_omap3630()) {
83 /* Set MMC I/O to 52Mhz */
84 prog_io = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
85 prog_io |= OMAP3630_PRG_SDMMC1_SPEEDCTRL;
86 omap_ctrl_writel(prog_io, OMAP343X_CONTROL_PROG_IO1);
88 reg |= OMAP2_PBIASSPEEDCTRL0;
90 reg &= ~OMAP2_PBIASLITEPWRDNZ0;
91 omap_ctrl_writel(reg, control_pbias_offset);
93 reg = omap_ctrl_readl(control_pbias_offset);
94 reg &= ~OMAP2_PBIASLITEPWRDNZ0;
95 omap_ctrl_writel(reg, control_pbias_offset);
99 static void omap_hsmmc1_after_set_reg(struct device *dev, int slot,
100 int power_on, int vdd)
104 /* 100ms delay required for PBIAS configuration */
108 reg = omap_ctrl_readl(control_pbias_offset);
109 reg |= (OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASSPEEDCTRL0);
110 if ((1 << vdd) <= MMC_VDD_165_195)
111 reg &= ~OMAP2_PBIASLITEVMODE0;
113 reg |= OMAP2_PBIASLITEVMODE0;
114 omap_ctrl_writel(reg, control_pbias_offset);
116 reg = omap_ctrl_readl(control_pbias_offset);
117 reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 |
118 OMAP2_PBIASLITEVMODE0);
119 omap_ctrl_writel(reg, control_pbias_offset);
123 static void omap4_hsmmc1_before_set_reg(struct device *dev, int slot,
124 int power_on, int vdd)
129 * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
130 * card with Vcc regulator (from twl4030 or whatever). OMAP has both
131 * 1.8V and 3.0V modes, controlled by the PBIAS register.
133 reg = omap4_ctrl_pad_readl(control_pbias_offset);
134 reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
135 OMAP4_MMC1_PWRDNZ_MASK |
136 OMAP4_MMC1_PBIASLITE_VMODE_MASK);
137 omap4_ctrl_pad_writel(reg, control_pbias_offset);
140 static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot,
141 int power_on, int vdd)
144 unsigned long timeout;
147 reg = omap4_ctrl_pad_readl(control_pbias_offset);
148 reg |= OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK;
149 if ((1 << vdd) <= MMC_VDD_165_195)
150 reg &= ~OMAP4_MMC1_PBIASLITE_VMODE_MASK;
152 reg |= OMAP4_MMC1_PBIASLITE_VMODE_MASK;
153 reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ_MASK |
154 OMAP4_MMC1_PWRDNZ_MASK);
155 omap4_ctrl_pad_writel(reg, control_pbias_offset);
157 timeout = jiffies + msecs_to_jiffies(5);
159 reg = omap4_ctrl_pad_readl(control_pbias_offset);
160 if (!(reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK))
162 usleep_range(100, 200);
163 } while (!time_after(jiffies, timeout));
165 if (reg & OMAP4_MMC1_PBIASLITE_VMODE_ERROR_MASK) {
166 pr_err("Pbias Voltage is not same as LDO\n");
167 /* Caution : On VMODE_ERROR Power Down MMC IO */
168 reg &= ~(OMAP4_MMC1_PWRDNZ_MASK);
169 omap4_ctrl_pad_writel(reg, control_pbias_offset);
174 static void hsmmc2_select_input_clk_src(struct omap_mmc_platform_data *mmc)
178 reg = omap_ctrl_readl(control_devconf1_offset);
179 if (mmc->slots[0].internal_clock)
180 reg |= OMAP2_MMCSDIO2ADPCLKISEL;
182 reg &= ~OMAP2_MMCSDIO2ADPCLKISEL;
183 omap_ctrl_writel(reg, control_devconf1_offset);
186 static void hsmmc2_before_set_reg(struct device *dev, int slot,
187 int power_on, int vdd)
189 struct omap_mmc_platform_data *mmc = dev->platform_data;
191 if (mmc->slots[0].remux)
192 mmc->slots[0].remux(dev, slot, power_on);
195 hsmmc2_select_input_clk_src(mmc);
198 static int am35x_hsmmc2_set_power(struct device *dev, int slot,
199 int power_on, int vdd)
201 struct omap_mmc_platform_data *mmc = dev->platform_data;
204 hsmmc2_select_input_clk_src(mmc);
209 static int nop_mmc_set_power(struct device *dev, int slot, int power_on,
215 static inline void omap_hsmmc_mux(struct omap_mmc_platform_data *mmc_controller,
218 if (gpio_is_valid(mmc_controller->slots[0].switch_pin) &&
219 (mmc_controller->slots[0].switch_pin < OMAP_MAX_GPIO_LINES))
220 omap_mux_init_gpio(mmc_controller->slots[0].switch_pin,
221 OMAP_PIN_INPUT_PULLUP);
222 if (gpio_is_valid(mmc_controller->slots[0].gpio_wp) &&
223 (mmc_controller->slots[0].gpio_wp < OMAP_MAX_GPIO_LINES))
224 omap_mux_init_gpio(mmc_controller->slots[0].gpio_wp,
225 OMAP_PIN_INPUT_PULLUP);
226 if (cpu_is_omap34xx()) {
227 if (controller_nr == 0) {
228 omap_mux_init_signal("sdmmc1_clk",
229 OMAP_PIN_INPUT_PULLUP);
230 omap_mux_init_signal("sdmmc1_cmd",
231 OMAP_PIN_INPUT_PULLUP);
232 omap_mux_init_signal("sdmmc1_dat0",
233 OMAP_PIN_INPUT_PULLUP);
234 if (mmc_controller->slots[0].caps &
235 (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
236 omap_mux_init_signal("sdmmc1_dat1",
237 OMAP_PIN_INPUT_PULLUP);
238 omap_mux_init_signal("sdmmc1_dat2",
239 OMAP_PIN_INPUT_PULLUP);
240 omap_mux_init_signal("sdmmc1_dat3",
241 OMAP_PIN_INPUT_PULLUP);
243 if (mmc_controller->slots[0].caps &
244 MMC_CAP_8_BIT_DATA) {
245 omap_mux_init_signal("sdmmc1_dat4",
246 OMAP_PIN_INPUT_PULLUP);
247 omap_mux_init_signal("sdmmc1_dat5",
248 OMAP_PIN_INPUT_PULLUP);
249 omap_mux_init_signal("sdmmc1_dat6",
250 OMAP_PIN_INPUT_PULLUP);
251 omap_mux_init_signal("sdmmc1_dat7",
252 OMAP_PIN_INPUT_PULLUP);
255 if (controller_nr == 1) {
257 omap_mux_init_signal("sdmmc2_clk",
258 OMAP_PIN_INPUT_PULLUP);
259 omap_mux_init_signal("sdmmc2_cmd",
260 OMAP_PIN_INPUT_PULLUP);
261 omap_mux_init_signal("sdmmc2_dat0",
262 OMAP_PIN_INPUT_PULLUP);
265 * For 8 wire configurations, Lines DAT4, 5, 6 and 7
266 * need to be muxed in the board-*.c files
268 if (mmc_controller->slots[0].caps &
269 (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA)) {
270 omap_mux_init_signal("sdmmc2_dat1",
271 OMAP_PIN_INPUT_PULLUP);
272 omap_mux_init_signal("sdmmc2_dat2",
273 OMAP_PIN_INPUT_PULLUP);
274 omap_mux_init_signal("sdmmc2_dat3",
275 OMAP_PIN_INPUT_PULLUP);
277 if (mmc_controller->slots[0].caps &
278 MMC_CAP_8_BIT_DATA) {
279 omap_mux_init_signal("sdmmc2_dat4.sdmmc2_dat4",
280 OMAP_PIN_INPUT_PULLUP);
281 omap_mux_init_signal("sdmmc2_dat5.sdmmc2_dat5",
282 OMAP_PIN_INPUT_PULLUP);
283 omap_mux_init_signal("sdmmc2_dat6.sdmmc2_dat6",
284 OMAP_PIN_INPUT_PULLUP);
285 omap_mux_init_signal("sdmmc2_dat7.sdmmc2_dat7",
286 OMAP_PIN_INPUT_PULLUP);
291 * For MMC3 the pins need to be muxed in the board-*.c files
296 static int omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
297 struct omap_mmc_platform_data *mmc)
301 hc_name = kzalloc(sizeof(char) * (HSMMC_NAME_LEN + 1), GFP_KERNEL);
303 pr_err("Cannot allocate memory for controller slot name\n");
309 strncpy(hc_name, c->name, HSMMC_NAME_LEN);
311 snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i",
313 mmc->slots[0].name = hc_name;
315 mmc->slots[0].caps = c->caps;
316 mmc->slots[0].pm_caps = c->pm_caps;
317 mmc->slots[0].internal_clock = !c->ext_clock;
318 mmc->dma_mask = 0xffffffff;
319 if (cpu_is_omap44xx())
320 mmc->reg_offset = OMAP4_MMC_REG_OFFSET;
324 mmc->get_context_loss_count = hsmmc_get_context_loss;
326 mmc->slots[0].switch_pin = c->gpio_cd;
327 mmc->slots[0].gpio_wp = c->gpio_wp;
329 mmc->slots[0].remux = c->remux;
330 mmc->slots[0].init_card = c->init_card;
333 mmc->slots[0].cover = 1;
336 mmc->slots[0].nonremovable = 1;
339 mmc->slots[0].power_saving = 1;
342 mmc->slots[0].no_off = 1;
345 mmc->slots[0].no_regulator_off_init = c->no_off_init;
347 if (c->vcc_aux_disable_is_sleep)
348 mmc->slots[0].vcc_aux_disable_is_sleep = 1;
351 * NOTE: MMC slots should have a Vcc regulator set up.
352 * This may be from a TWL4030-family chip, another
353 * controllable regulator, or a fixed supply.
355 * temporary HACK: ocr_mask instead of fixed supply
357 if (cpu_is_omap3505() || cpu_is_omap3517())
358 mmc->slots[0].ocr_mask = MMC_VDD_165_195 |
365 mmc->slots[0].ocr_mask = c->ocr_mask;
367 if (!cpu_is_omap3517() && !cpu_is_omap3505())
368 mmc->slots[0].features |= HSMMC_HAS_PBIAS;
370 if (cpu_is_omap44xx() && (omap_rev() > OMAP4430_REV_ES1_0))
371 mmc->slots[0].features |= HSMMC_HAS_UPDATED_RESET;
375 if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
376 /* on-chip level shifting via PBIAS0/PBIAS1 */
377 if (cpu_is_omap44xx()) {
378 mmc->slots[0].before_set_reg =
379 omap4_hsmmc1_before_set_reg;
380 mmc->slots[0].after_set_reg =
381 omap4_hsmmc1_after_set_reg;
383 mmc->slots[0].before_set_reg =
384 omap_hsmmc1_before_set_reg;
385 mmc->slots[0].after_set_reg =
386 omap_hsmmc1_after_set_reg;
390 if (cpu_is_omap3517() || cpu_is_omap3505())
391 mmc->slots[0].set_power = nop_mmc_set_power;
393 /* OMAP3630 HSMMC1 supports only 4-bit */
394 if (cpu_is_omap3630() &&
395 (c->caps & MMC_CAP_8_BIT_DATA)) {
396 c->caps &= ~MMC_CAP_8_BIT_DATA;
397 c->caps |= MMC_CAP_4_BIT_DATA;
398 mmc->slots[0].caps = c->caps;
402 if (cpu_is_omap3517() || cpu_is_omap3505())
403 mmc->slots[0].set_power = am35x_hsmmc2_set_power;
407 if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) {
408 c->caps &= ~MMC_CAP_8_BIT_DATA;
409 c->caps |= MMC_CAP_4_BIT_DATA;
411 if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
412 /* off-chip level shifting, or none */
413 mmc->slots[0].before_set_reg = hsmmc2_before_set_reg;
414 mmc->slots[0].after_set_reg = NULL;
420 mmc->slots[0].before_set_reg = NULL;
421 mmc->slots[0].after_set_reg = NULL;
424 pr_err("MMC%d configuration not supported!\n", c->mmc);
431 #define MAX_OMAP_MMC_HWMOD_NAME_LEN 16
433 void omap_init_hsmmc(struct omap2_hsmmc_info *hsmmcinfo, int ctrl_nr)
435 struct omap_hwmod *oh;
436 struct platform_device *pdev;
437 char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
438 struct omap_mmc_platform_data *mmc_data;
439 struct omap_mmc_dev_attr *mmc_dev_attr;
443 mmc_data = kzalloc(sizeof(struct omap_mmc_platform_data), GFP_KERNEL);
445 pr_err("Cannot allocate memory for mmc device!\n");
449 if (omap_hsmmc_pdata_init(hsmmcinfo, mmc_data) < 0) {
450 pr_err("%s fails!\n", __func__);
453 omap_hsmmc_mux(mmc_data, (ctrl_nr - 1));
457 l = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
459 WARN(l >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
460 "String buffer overflow in MMC%d device setup\n", ctrl_nr);
461 oh = omap_hwmod_lookup(oh_name);
463 pr_err("Could not look up %s\n", oh_name);
464 kfree(mmc_data->slots[0].name);
468 if (oh->dev_attr != NULL) {
469 mmc_dev_attr = oh->dev_attr;
470 mmc_data->controller_flags = mmc_dev_attr->flags;
473 pdev = omap_device_build(name, ctrl_nr - 1, oh, mmc_data,
474 sizeof(struct omap_mmc_platform_data), NULL, 0, false);
476 WARN(1, "Can't build omap_device for %s:%s.\n", name, oh->name);
477 kfree(mmc_data->slots[0].name);
481 * return device handle to board setup code
482 * required to populate for regulator framework structure
484 hsmmcinfo->dev = &pdev->dev;
490 void omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
494 if (!cpu_is_omap44xx()) {
495 if (cpu_is_omap2430()) {
496 control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
497 control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
499 control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
500 control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
503 control_pbias_offset =
504 OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_PBIASLITE;
505 control_mmc1 = OMAP4_CTRL_MODULE_PAD_CORE_CONTROL_MMC1;
506 reg = omap4_ctrl_pad_readl(control_mmc1);
507 reg |= (OMAP4_SDMMC1_PUSTRENGTH_GRP0_MASK |
508 OMAP4_SDMMC1_PUSTRENGTH_GRP1_MASK);
509 reg &= ~(OMAP4_SDMMC1_PUSTRENGTH_GRP2_MASK |
510 OMAP4_SDMMC1_PUSTRENGTH_GRP3_MASK);
511 reg |= (OMAP4_SDMMC1_DR0_SPEEDCTRL_MASK |
512 OMAP4_SDMMC1_DR1_SPEEDCTRL_MASK |
513 OMAP4_SDMMC1_DR2_SPEEDCTRL_MASK);
514 omap4_ctrl_pad_writel(reg, control_mmc1);
517 for (; controllers->mmc; controllers++)
518 omap_init_hsmmc(controllers, controllers->mmc);