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 <mach/hardware.h>
17 #include <plat/control.h>
19 #include <plat/omap-pm.h>
23 #if defined(CONFIG_MMC_OMAP_HS) || defined(CONFIG_MMC_OMAP_HS_MODULE)
25 static u16 control_pbias_offset;
26 static u16 control_devconf1_offset;
28 #define HSMMC_NAME_LEN 9
30 static struct hsmmc_controller {
31 char name[HSMMC_NAME_LEN + 1];
32 } hsmmc[OMAP34XX_NR_MMC];
34 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
36 static int hsmmc_get_context_loss(struct device *dev)
38 return omap_pm_get_dev_context_loss_count(dev);
42 #define hsmmc_get_context_loss NULL
45 static void hsmmc1_before_set_reg(struct device *dev, int slot,
46 int power_on, int vdd)
49 struct omap_mmc_platform_data *mmc = dev->platform_data;
51 if (mmc->slots[0].remux)
52 mmc->slots[0].remux(dev, slot, power_on);
55 * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
56 * card with Vcc regulator (from twl4030 or whatever). OMAP has both
57 * 1.8V and 3.0V modes, controlled by the PBIAS register.
59 * In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which
60 * is most naturally TWL VSIM; those pins also use PBIAS.
62 * FIXME handle VMMC1A as needed ...
65 if (cpu_is_omap2430()) {
66 reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1);
67 if ((1 << vdd) >= MMC_VDD_30_31)
68 reg |= OMAP243X_MMC1_ACTIVE_OVERWRITE;
70 reg &= ~OMAP243X_MMC1_ACTIVE_OVERWRITE;
71 omap_ctrl_writel(reg, OMAP243X_CONTROL_DEVCONF1);
74 if (mmc->slots[0].internal_clock) {
75 reg = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0);
76 reg |= OMAP2_MMCSDIO1ADPCLKISEL;
77 omap_ctrl_writel(reg, OMAP2_CONTROL_DEVCONF0);
80 reg = omap_ctrl_readl(control_pbias_offset);
81 if (cpu_is_omap3630()) {
82 /* Set MMC I/O to 52Mhz */
83 prog_io = omap_ctrl_readl(OMAP343X_CONTROL_PROG_IO1);
84 prog_io |= OMAP3630_PRG_SDMMC1_SPEEDCTRL;
85 omap_ctrl_writel(prog_io, OMAP343X_CONTROL_PROG_IO1);
87 reg |= OMAP2_PBIASSPEEDCTRL0;
89 reg &= ~OMAP2_PBIASLITEPWRDNZ0;
90 omap_ctrl_writel(reg, control_pbias_offset);
92 reg = omap_ctrl_readl(control_pbias_offset);
93 reg &= ~OMAP2_PBIASLITEPWRDNZ0;
94 omap_ctrl_writel(reg, control_pbias_offset);
98 static void hsmmc1_after_set_reg(struct device *dev, int slot,
99 int power_on, int vdd)
103 /* 100ms delay required for PBIAS configuration */
107 reg = omap_ctrl_readl(control_pbias_offset);
108 reg |= (OMAP2_PBIASLITEPWRDNZ0 | OMAP2_PBIASSPEEDCTRL0);
109 if ((1 << vdd) <= MMC_VDD_165_195)
110 reg &= ~OMAP2_PBIASLITEVMODE0;
112 reg |= OMAP2_PBIASLITEVMODE0;
113 omap_ctrl_writel(reg, control_pbias_offset);
115 reg = omap_ctrl_readl(control_pbias_offset);
116 reg |= (OMAP2_PBIASSPEEDCTRL0 | OMAP2_PBIASLITEPWRDNZ0 |
117 OMAP2_PBIASLITEVMODE0);
118 omap_ctrl_writel(reg, control_pbias_offset);
122 static void hsmmc23_before_set_reg(struct device *dev, int slot,
123 int power_on, int vdd)
125 struct omap_mmc_platform_data *mmc = dev->platform_data;
127 if (mmc->slots[0].remux)
128 mmc->slots[0].remux(dev, slot, power_on);
131 /* Only MMC2 supports a CLKIN */
132 if (mmc->slots[0].internal_clock) {
135 reg = omap_ctrl_readl(control_devconf1_offset);
136 reg |= OMAP2_MMCSDIO2ADPCLKISEL;
137 omap_ctrl_writel(reg, control_devconf1_offset);
142 static int nop_mmc_set_power(struct device *dev, int slot, int power_on,
148 static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;
150 void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
152 struct omap2_hsmmc_info *c;
153 int nr_hsmmc = ARRAY_SIZE(hsmmc_data);
156 if (cpu_is_omap2430()) {
157 control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
158 control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
160 control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
161 control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
164 for (c = controllers; c->mmc; c++) {
165 struct hsmmc_controller *hc = hsmmc + c->mmc - 1;
166 struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];
168 if (!c->mmc || c->mmc > nr_hsmmc) {
169 pr_debug("MMC%d: no such controller\n", c->mmc);
173 pr_debug("MMC%d: already configured\n", c->mmc);
177 mmc = kzalloc(sizeof(struct omap_mmc_platform_data),
180 pr_err("Cannot allocate memory for mmc device!\n");
185 strncpy(hc->name, c->name, HSMMC_NAME_LEN);
187 snprintf(hc->name, ARRAY_SIZE(hc->name),
188 "mmc%islot%i", c->mmc, 1);
189 mmc->slots[0].name = hc->name;
191 mmc->slots[0].wires = c->wires;
192 mmc->slots[0].internal_clock = !c->ext_clock;
193 mmc->dma_mask = 0xffffffff;
195 mmc->get_context_loss_count = hsmmc_get_context_loss;
197 mmc->slots[0].switch_pin = c->gpio_cd;
198 mmc->slots[0].gpio_wp = c->gpio_wp;
200 mmc->slots[0].remux = c->remux;
203 mmc->slots[0].cover = 1;
206 mmc->slots[0].nonremovable = 1;
209 mmc->slots[0].power_saving = 1;
212 mmc->slots[0].no_off = 1;
214 if (c->vcc_aux_disable_is_sleep)
215 mmc->slots[0].vcc_aux_disable_is_sleep = 1;
217 /* NOTE: MMC slots should have a Vcc regulator set up.
218 * This may be from a TWL4030-family chip, another
219 * controllable regulator, or a fixed supply.
221 * temporary HACK: ocr_mask instead of fixed supply
223 mmc->slots[0].ocr_mask = c->ocr_mask;
225 if (cpu_is_omap3517() || cpu_is_omap3505())
226 mmc->slots[0].set_power = nop_mmc_set_power;
228 mmc->slots[0].features |= HSMMC_HAS_PBIAS;
232 if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
233 /* on-chip level shifting via PBIAS0/PBIAS1 */
234 mmc->slots[0].before_set_reg = hsmmc1_before_set_reg;
235 mmc->slots[0].after_set_reg = hsmmc1_after_set_reg;
238 /* Omap3630 HSMMC1 supports only 4-bit */
239 if (cpu_is_omap3630() && c->wires > 4) {
241 mmc->slots[0].wires = c->wires;
247 if (c->transceiver && c->wires > 4)
251 if (mmc->slots[0].features & HSMMC_HAS_PBIAS) {
252 /* off-chip level shifting, or none */
253 mmc->slots[0].before_set_reg = hsmmc23_before_set_reg;
254 mmc->slots[0].after_set_reg = NULL;
258 pr_err("MMC%d configuration not supported!\n", c->mmc);
262 hsmmc_data[c->mmc - 1] = mmc;
265 omap2_init_mmc(hsmmc_data, OMAP34XX_NR_MMC);
267 /* pass the device nodes back to board setup code */
268 for (c = controllers; c->mmc; c++) {
269 struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];
271 if (!c->mmc || c->mmc > nr_hsmmc)
277 for (i = 0; i < nr_hsmmc; i++)
278 kfree(hsmmc_data[i]);