This patch adds PBIAS Configuration during POWER ON and OFF.
Also it adds MMC1 Card detect configuration on Phoenix
Signed-off-by: Kishore Kadiyala <kishore.kadiyala@xxxxxx>
---
arch/arm/mach-omap2/hsmmc.c | 121 ++++++++++++++++++++++++++---
arch/arm/plat-omap/include/plat/control.h | 17 ++++
include/linux/i2c/twl.h | 42 +++++++++-
3 files changed, 166 insertions(+), 14 deletions(-)
diff --git a/arch/arm/mach-omap2/hsmmc.c b/arch/arm/mach-omap2/hsmmc.c
index f5ca16c..a73f011 100644
--- a/arch/arm/mach-omap2/hsmmc.c
+++ b/arch/arm/mach-omap2/hsmmc.c
@@ -14,6 +14,7 @@
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/i2c/twl.h>
+#include <linux/platform_device.h>
#include <mach/hardware.h>
#include <plat/control.h>
#include <plat/mmc.h>
@@ -25,6 +26,7 @@
static u16 control_pbias_offset;
static u16 control_devconf1_offset;
+static u16 control_mmc1;
#define HSMMC_NAME_LEN 9
@@ -43,7 +45,7 @@ static int hsmmc_get_context_loss(struct device *dev)
#define hsmmc_get_context_loss NULL
#endif
-static void hsmmc1_before_set_reg(struct device *dev, int slot,
+static void omap_hsmmc1_before_set_reg(struct device *dev, int slot,
int power_on, int vdd)
{
u32 reg, prog_io;
@@ -96,7 +98,7 @@ static void hsmmc1_before_set_reg(struct device *dev, int slot,
}
}
-static void hsmmc1_after_set_reg(struct device *dev, int slot,
+static void omap_hsmmc1_after_set_reg(struct device *dev, int slot,
int power_on, int vdd)
{
u32 reg;
@@ -120,6 +122,61 @@ static void hsmmc1_after_set_reg(struct device *dev, int slot,
}
}
+static void omap4_hsmmc1_before_set_reg(struct device *dev, int slot,
+ int power_on, int vdd)
+{
+ u32 reg;
+
+ /*
+ * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
+ * card with Vcc regulator (from twl4030 or whatever). OMAP has both
+ * 1.8V and 3.0V modes, controlled by the PBIAS register.
+ *
+ * In 8-bit modes, OMAP VMMC1A (for DAT4..7) needs a supply, which
+ * is most naturally TWL VSIM; those pins also use PBIAS.
+ *
+ * FIXME handle VMMC1A as needed ...
+ */
+ if (power_on) {
+ reg = omap_ctrl_readl(control_pbias_offset);
+ reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ | OMAP4_MMC1_PWRDNZ);
+ omap_ctrl_writel(reg, control_pbias_offset);
+ } else {
+ reg = omap_ctrl_readl(control_pbias_offset);
+ reg &= ~(OMAP4_MMC1_PBIASLITE_PWRDNZ | OMAP4_MMC1_PWRDNZ);
+ omap_ctrl_writel(reg, control_pbias_offset);
+ }
+}
+
+static void omap4_hsmmc1_after_set_reg(struct device *dev, int slot,
+ int power_on, int vdd)
+{
+ u32 reg;
+
+ /* 100ms delay required for PBIAS configuration */
+ msleep(100);
+
+ if (power_on) {
+ reg = omap_ctrl_readl(control_pbias_offset);
+ reg |= OMAP4_MMC1_PBIASLITE_PWRDNZ;
+ if ((1 << vdd) <= MMC_VDD_165_195) {
+ reg &= ~OMAP4_MMC1_PBIASLITE_VMODE;
+ reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ |
+ OMAP4_MMC1_PWRDNZ);
+ } else {
+ reg |= (OMAP4_MMC1_PBIASLITE_VMODE |
+ OMAP4_MMC1_PBIASLITE_PWRDNZ |
+ OMAP4_MMC1_PWRDNZ);
+ }
+ omap_ctrl_writel(reg, control_pbias_offset);
+ } else {
+ reg = omap_ctrl_readl(control_pbias_offset);
+ reg |= (OMAP4_MMC1_PBIASLITE_PWRDNZ |
+ OMAP4_MMC1_PBIASLITE_VMODE | OMAP4_MMC1_PWRDNZ);
+ omap_ctrl_writel(reg, control_pbias_offset);
+ }
+}
+
static void hsmmc23_before_set_reg(struct device *dev, int slot,
int power_on, int vdd)
{
@@ -140,6 +197,24 @@ static void hsmmc23_before_set_reg(struct device *dev, int slot,
}
}
+static int mmc_twl_late_init(struct device *dev)
+{
+ int ret = 0;
+ struct platform_device *pdev = container_of(dev,
+ struct platform_device, dev);
+
+ if (cpu_is_omap44xx()) {
+ /* MMC1 Card detect Configuration */
+ if (pdev->id == 0) {
+ ret = omap4_hsmmc1_card_detect_config();
+ if (ret < 0)
+ pr_err("Unable to configure"
+ "Card detect for MMC1\n");
+ }
+ }
+ return ret;
+}
+
static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;
void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
@@ -147,13 +222,28 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info
struct omap2_hsmmc_info *c;
int nr_hsmmc = ARRAY_SIZE(hsmmc_data);
int i;
+ u32 reg;
- if (cpu_is_omap2430()) {
- control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
- control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
+ if (!cpu_is_omap44xx()) {
+ if (cpu_is_omap2430()) {
+ control_pbias_offset = OMAP243X_CONTROL_PBIAS_LITE;
+ control_devconf1_offset = OMAP243X_CONTROL_DEVCONF1;
+ } else {
+ control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
+ control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
+ }
} else {
- control_pbias_offset = OMAP343X_CONTROL_PBIAS_LITE;
- control_devconf1_offset = OMAP343X_CONTROL_DEVCONF1;
+ control_pbias_offset = OMAP44XX_CONTROL_PBIAS_LITE;
+ control_mmc1 = OMAP44XX_CONTROL_MMC1;
+ reg = omap_ctrl_readl(control_mmc1);
+ reg |= (OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP0 |
+ OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP1);
+ reg &= ~(OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP2 |
+ OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP3);
+ reg |= (OMAP4_CONTROL_SDMMC1_DR0_SPEEDCTRL |
+ OMAP4_CONTROL_SDMMC1_DR1_SPEEDCTRL |
+ OMAP4_CONTROL_SDMMC1_DR2_SPEEDCTRL);
+ omap_ctrl_writel(reg, control_mmc1);
}
for (c = controllers; c->mmc; c++) {
@@ -186,6 +276,7 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info *controllers)
mmc->slots[0].wires = c->wires;
mmc->slots[0].internal_clock = !c->ext_clock;
mmc->dma_mask = 0xffffffff;
+ mmc->init = mmc_twl_late_init;
mmc->get_context_loss_count = hsmmc_get_context_loss;
@@ -220,10 +311,18 @@ void __init omap2_hsmmc_init(struct omap2_hsmmc_info
switch (c->mmc) {
case 1:
- /* on-chip level shifting via PBIAS0/PBIAS1 */
- mmc->slots[0].before_set_reg = hsmmc1_before_set_reg;
- mmc->slots[0].after_set_reg = hsmmc1_after_set_reg;
-
+ if (cpu_is_omap44xx()) {
+ /* on-chip level shifting via PBIAS0/PBIAS1 */
+ mmc->slots[0].before_set_reg =
+ omap4_hsmmc1_before_set_reg;
+ mmc->slots[0].after_set_reg =
+ omap4_hsmmc1_after_set_reg;
+ } else {
+ mmc->slots[0].before_set_reg =
+ omap_hsmmc1_before_set_reg;
+ mmc->slots[0].after_set_reg =
+ omap_hsmmc1_after_set_reg;
+ }
/* Omap3630 HSMMC1 supports only 4-bit */
if (cpu_is_omap3630() && c->wires > 4) {
c->wires = 4;
diff --git a/arch/arm/plat-omap/include/plat/control.h b/arch/arm/plat-omap/include/plat/control.h
index a56deee..6d17a61 100644
--- a/arch/arm/plat-omap/include/plat/control.h
+++ b/arch/arm/plat-omap/include/plat/control.h
@@ -207,6 +207,9 @@
/* 44xx control status register offset */
#define OMAP44XX_CONTROL_STATUS 0x2c4
+/* 44xx-only CONTROL_GENERAL register offsets */
+#define OMAP44XX_CONTROL_MMC1 0x628
+#define OMAP44XX_CONTROL_PBIAS_LITE 0x600
/*
* REVISIT: This list of registers is not comprehensive - there are more
* that should be added.
@@ -252,6 +255,20 @@
#define OMAP2_PBIASLITEPWRDNZ0 (1 << 1)
#define OMAP2_PBIASLITEVMODE0 (1 << 0)
+/* CONTROL_PBIAS_LITE bits for OMAP4 */
+#define OMAP4_MMC1_PWRDNZ (1 << 26)
+#define OMAP4_MMC1_PBIASLITE_HIZ_MODE (1 << 25)
+#define OMAP4_MMC1_PBIASLITE_PWRDNZ (1 << 22)
+#define OMAP4_MMC1_PBIASLITE_VMODE (1 << 21)
+
+#define OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP0 (1 << 31)
+#define OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP1 (1 << 30)
+#define OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP2 (1 << 29)
+#define OMAP4_CONTROL_SDMMC1_PUSTRENGTHGRP3 (1 << 28)
+#define OMAP4_CONTROL_SDMMC1_DR0_SPEEDCTRL (1 << 27)
+#define OMAP4_CONTROL_SDMMC1_DR1_SPEEDCTRL (1 << 26)
+#define OMAP4_CONTROL_SDMMC1_DR2_SPEEDCTRL (1 << 25)
+
/* CONTROL_PROG_IO1 bits */
#define OMAP3630_PRG_SDMMC1_SPEEDCTRL (1 << 20)
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index eb198db..423a355 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -142,6 +142,13 @@
#define TWL6030_CHARGER_FAULT_INT_MASK 0x60
#define TWL6030_MMCCTRL 0xEE
+#define VMMC_AUTO_OFF (0x1 << 3)
+#define SW_FC (0x1 << 2)
+
+#define TWL6030_CFG_INPUT_PUPD3 0xF2
+#define MMC_PU (0x1 << 3)
+#define MMC_PD (0x1 << 2)
+
#define TWL4030_CLASS_ID 0x4030
#define TWL6030_CLASS_ID 0x6030
@@ -174,11 +181,40 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned
int twl6030_interrupt_unmask(u8 bit_mask, u8 offset);
int twl6030_interrupt_mask(u8 bit_mask, u8 offset);
-/*
- * MMC1 Controller on OMAP4 uses Phoenix Irq for Card detect.
- */
+/* MMC1 Controller on OMAP4 uses Phoenix Irq for Card detect */
int twl6030_mmc_card_detect(struct device *dev, int slot);
+/* Configuring Card Detect for MMC1 */
+static inline int omap4_hsmmc1_card_detect_config(void)
+{
+ int res = -1;
+ u8 reg_val = 0;
+
+ /* Unmasking the Card detect Interrupt line for MMC1 from Phoenix */
+ if (twl_class_is_6030()) {
+ twl6030_interrupt_unmask(TWL6030_MMCDETECT_INT_MASK,
+ REG_INT_MSK_LINE_B);
+ twl6030_interrupt_unmask(TWL6030_MMCDETECT_INT_MASK,
+ REG_INT_MSK_STS_B);
+ }
+
+ /*
+ * Intially Configuring MMC_CTRL for receving interrupts &
+ * Card status on TWL6030 for MMC1
+ */
+ reg_val |= (SW_FC & ~VMMC_AUTO_OFF);
+ twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val, TWL6030_MMCCTRL);
+ res = twl_i2c_read_u8(TWL6030_MODULE_ID0, ®_val,
+ TWL6030_CFG_INPUT_PUPD3);
+ if (res < 0)
+ return -EINVAL;
+ reg_val = 0;
+ reg_val &= ~(MMC_PU | MMC_PD);
+ twl_i2c_write_u8(TWL6030_MODULE_ID0, reg_val,
+ TWL6030_CFG_INPUT_PUPD3);
+ return 0;
+}
+
/*----------------------------------------------------------------------*/
/*
--
1.6.3.3
--
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