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 <linux/mmc/host.h>
18 #include <linux/platform_data/gpio-omap.h>
19 #include <linux/platform_data/hsmmc-omap.h>
22 #include "omap_device.h"
28 #if IS_ENABLED(CONFIG_MMC_OMAP_HS)
30 static u16 control_pbias_offset;
31 static u16 control_devconf1_offset;
33 #define HSMMC_NAME_LEN 9
35 static void omap_hsmmc1_before_set_reg(struct device *dev,
36 int power_on, int vdd)
39 struct omap_hsmmc_platform_data *mmc = dev->platform_data;
42 mmc->remux(dev, power_on);
45 * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
46 * card with Vcc regulator (from twl4030 or whatever). OMAP has both
47 * 1.8V and 3.0V modes, controlled by the PBIAS register.
49 * In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which
50 * is most naturally TWL VSIM; those pins also use PBIAS.
52 * FIXME handle VMMC1A as needed ...
55 if (cpu_is_omap2430()) {
56 reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1);
57 if ((1 << vdd) >= MMC_VDD_30_31)
58 reg |= OMAP243X_MMC1_ACTIVE_OVERWRITE;
60 reg &= ~OMAP243X_MMC1_ACTIVE_OVERWRITE;
61 omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1);
64 if (mmc->internal_clock) {
65 reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
66 reg |= OMAP2_MMCSDIO1ADPCLKISEL;
67 omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0);
70 reg = omap_ctrl_readl(control_pbias_offset);
71 if (cpu_is_omap3630()) {
72 /* Set MMC I/O to 52MHz */
73 prog_io = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
74 prog_io |= OMAP3630_PRG_SDMMC1_SPEEDCTRL;
75 omap_ctrl_writel(prog_io, OMAP343X_CONTROL_PROG_IO1);
77 reg |= OMAP2_PBIASSPEEDCTRL0;
79 reg &= ~OMAP2_PBIASLITEPWRDNZ0;
80 omap_ctrl_writel(reg, control_pbias_offset);
82 reg = omap_ctrl_readl(control_pbias_offset);
83 reg &= ~OMAP2_PBIASLITEPWRDNZ0;
84 omap_ctrl_writel(reg, control_pbias_offset);
88 static void omap_hsmmc1_after_set_reg(struct device *dev, int power_on, int vdd)
92 /* 100ms delay required for PBIAS configuration */
96 reg = omap_ctrl_readl(control_pbias_offset);
97 reg |= (OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASSPEEDCTRL0);
98 if ((1 << vdd) <= MMC_VDD_165_195)
99 reg &= ~OMAP2_PBIASLITEVMODE0;
101 reg |= OMAP2_PBIASLITEVMODE0;
102 omap_ctrl_writel(reg, control_pbias_offset);
104 reg = omap_ctrl_readl(control_pbias_offset);
105 reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 |
106 OMAP2_PBIASLITEVMODE0);
107 omap_ctrl_writel(reg, control_pbias_offset);
111 static void hsmmc2_select_input_clk_src(struct omap_hsmmc_platform_data *mmc)
115 reg = omap_ctrl_readl(control_devconf1_offset);
116 if (mmc->internal_clock)
117 reg |= OMAP2_MMCSDIO2ADPCLKISEL;
119 reg &= ~OMAP2_MMCSDIO2ADPCLKISEL;
120 omap_ctrl_writel(reg, control_devconf1_offset);
123 static void hsmmc2_before_set_reg(struct device *dev, int power_on, int vdd)
125 struct omap_hsmmc_platform_data *mmc = dev->platform_data;
128 mmc->remux(dev, power_on);
131 hsmmc2_select_input_clk_src(mmc);
134 static int am35x_hsmmc2_set_power(struct device *dev, int power_on, int vdd)
136 struct omap_hsmmc_platform_data *mmc = dev->platform_data;
139 hsmmc2_select_input_clk_src(mmc);
144 static int nop_mmc_set_power(struct device *dev, int power_on, int vdd)
149 static int __init omap_hsmmc_pdata_init(struct omap2_hsmmc_info *c,
150 struct omap_hsmmc_platform_data *mmc)
154 hc_name = kzalloc(sizeof(char) * (HSMMC_NAME_LEN + 1), GFP_KERNEL);
156 pr_err("Cannot allocate memory for controller slot name\n");
162 strncpy(hc_name, c->name, HSMMC_NAME_LEN);
164 snprintf(hc_name, (HSMMC_NAME_LEN + 1), "mmc%islot%i",
168 mmc->internal_clock = !c->ext_clock;
172 /* detect if mobile phone cover removed */
173 mmc->gpio_cd = -EINVAL;
174 mmc->gpio_cod = c->gpio_cd;
176 /* card detect pin on the mmc socket itself */
177 mmc->gpio_cd = c->gpio_cd;
178 mmc->gpio_cod = -EINVAL;
180 mmc->gpio_wp = c->gpio_wp;
182 mmc->remux = c->remux;
183 mmc->init_card = c->init_card;
186 mmc->nonremovable = 1;
189 * NOTE: MMC slots should have a Vcc regulator set up.
190 * This may be from a TWL4030-family chip, another
191 * controllable regulator, or a fixed supply.
193 * temporary HACK: ocr_mask instead of fixed supply
196 mmc->ocr_mask = MMC_VDD_165_195 |
203 mmc->ocr_mask = c->ocr_mask;
205 if (!soc_is_am35xx())
206 mmc->features |= HSMMC_HAS_PBIAS;
210 if (mmc->features & HSMMC_HAS_PBIAS) {
211 /* on-chip level shifting via PBIAS0/PBIAS1 */
212 mmc->before_set_reg =
213 omap_hsmmc1_before_set_reg;
215 omap_hsmmc1_after_set_reg;
219 mmc->set_power = nop_mmc_set_power;
221 /* OMAP3630 HSMMC1 supports only 4-bit */
222 if (cpu_is_omap3630() &&
223 (c->caps & MMC_CAP_8_BIT_DATA)) {
224 c->caps &= ~MMC_CAP_8_BIT_DATA;
225 c->caps |= MMC_CAP_4_BIT_DATA;
231 mmc->set_power = am35x_hsmmc2_set_power;
235 if (c->transceiver && (c->caps & MMC_CAP_8_BIT_DATA)) {
236 c->caps &= ~MMC_CAP_8_BIT_DATA;
237 c->caps |= MMC_CAP_4_BIT_DATA;
239 if (mmc->features & HSMMC_HAS_PBIAS) {
240 /* off-chip level shifting, or none */
241 mmc->before_set_reg = hsmmc2_before_set_reg;
242 mmc->after_set_reg = NULL;
248 mmc->before_set_reg = NULL;
249 mmc->after_set_reg = NULL;
252 pr_err("MMC%d configuration not supported!\n", c->mmc);
259 static int omap_hsmmc_done;
261 void omap_hsmmc_late_init(struct omap2_hsmmc_info *c)
263 struct platform_device *pdev;
264 struct omap_hsmmc_platform_data *mmc_pdata;
267 if (omap_hsmmc_done != 1)
272 for (; c->mmc; c++) {
280 mmc_pdata = pdev->dev.platform_data;
285 /* detect if mobile phone cover removed */
286 mmc_pdata->gpio_cd = -EINVAL;
287 mmc_pdata->gpio_cod = c->gpio_cd;
289 /* card detect pin on the mmc socket itself */
290 mmc_pdata->gpio_cd = c->gpio_cd;
291 mmc_pdata->gpio_cod = -EINVAL;
293 mmc_pdata->gpio_wp = c->gpio_wp;
295 res = omap_device_register(pdev);
297 pr_err("Could not late init MMC %s\n",
302 #define MAX_OMAP_MMC_HWMOD_NAME_LEN 16
304 static void __init omap_hsmmc_init_one(struct omap2_hsmmc_info *hsmmcinfo,
307 struct omap_hwmod *oh;
308 struct omap_hwmod *ohs[1];
309 struct omap_device *od;
310 struct platform_device *pdev;
311 char oh_name[MAX_OMAP_MMC_HWMOD_NAME_LEN];
312 struct omap_hsmmc_platform_data *mmc_data;
313 struct omap_hsmmc_dev_attr *mmc_dev_attr;
317 mmc_data = kzalloc(sizeof(*mmc_data), GFP_KERNEL);
319 pr_err("Cannot allocate memory for mmc device!\n");
323 res = omap_hsmmc_pdata_init(hsmmcinfo, mmc_data);
328 res = snprintf(oh_name, MAX_OMAP_MMC_HWMOD_NAME_LEN,
330 WARN(res >= MAX_OMAP_MMC_HWMOD_NAME_LEN,
331 "String buffer overflow in MMC%d device setup\n", ctrl_nr);
333 oh = omap_hwmod_lookup(oh_name);
335 pr_err("Could not look up %s\n", oh_name);
339 if (oh->dev_attr != NULL) {
340 mmc_dev_attr = oh->dev_attr;
341 mmc_data->controller_flags = mmc_dev_attr->flags;
343 * erratum 2.1.1.128 doesn't apply if board has
344 * a transceiver is attached
346 if (hsmmcinfo->transceiver)
347 mmc_data->controller_flags &=
348 ~OMAP_HSMMC_BROKEN_MULTIBLOCK_READ;
351 pdev = platform_device_alloc(name, ctrl_nr - 1);
353 pr_err("Could not allocate pdev for %s\n", name);
356 dev_set_name(&pdev->dev, "%s.%d", pdev->name, pdev->id);
358 od = omap_device_alloc(pdev, ohs, 1);
360 pr_err("Could not allocate od for %s\n", name);
364 res = platform_device_add_data(pdev, mmc_data,
365 sizeof(struct omap_hsmmc_platform_data));
367 pr_err("Could not add pdata for %s\n", name);
371 hsmmcinfo->pdev = pdev;
373 if (hsmmcinfo->deferred)
376 res = omap_device_register(pdev);
378 pr_err("Could not register od for %s\n", name);
385 omap_device_delete(od);
388 platform_device_put(pdev);
391 kfree(mmc_data->name);
397 void __init omap_hsmmc_init(struct omap2_hsmmc_info *controllers)
404 if (cpu_is_omap2430()) {
405 control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
406 control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
408 control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
409 control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
412 for (; controllers->mmc; controllers++)
413 omap_hsmmc_init_one(controllers, controllers->mmc);