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-rw-r--r--arch/arm/mach-omap2/mmc-twl4030.c187
1 files changed, 131 insertions, 56 deletions
diff --git a/arch/arm/mach-omap2/mmc-twl4030.c b/arch/arm/mach-omap2/mmc-twl4030.c
index 437f52073f6e..dc40b3e72206 100644
--- a/arch/arm/mach-omap2/mmc-twl4030.c
+++ b/arch/arm/mach-omap2/mmc-twl4030.c
@@ -17,6 +17,7 @@
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/i2c/twl4030.h>
+#include <linux/regulator/machine.h>
#include <mach/hardware.h>
#include <mach/control.h>
@@ -44,6 +45,7 @@
#define VMMC2_315V 0x0c
#define VMMC2_300V 0x0b
#define VMMC2_285V 0x0a
+#define VMMC2_280V 0x09
#define VMMC2_260V 0x08
#define VMMC2_185V 0x06
#define VMMC2_DEDICATED 0x2E
@@ -59,8 +61,8 @@ static struct twl_mmc_controller {
struct omap_mmc_platform_data *mmc;
u8 twl_vmmc_dev_grp;
u8 twl_mmc_dedicated;
- char name[HSMMC_NAME_LEN];
-} hsmmc[] = {
+ char name[HSMMC_NAME_LEN + 1];
+} hsmmc[OMAP34XX_NR_MMC] = {
{
.twl_vmmc_dev_grp = VMMC1_DEV_GRP,
.twl_mmc_dedicated = VMMC1_DEDICATED,
@@ -98,6 +100,14 @@ static int twl_mmc_get_ro(struct device *dev, int slot)
return gpio_get_value_cansleep(mmc->slots[0].gpio_wp);
}
+static int twl_mmc_get_cover_state(struct device *dev, int slot)
+{
+ struct omap_mmc_platform_data *mmc = dev->platform_data;
+
+ /* NOTE: assumes card detect signal is active-low */
+ return !gpio_get_value_cansleep(mmc->slots[0].switch_pin);
+}
+
/*
* MMC Slot Initialization.
*/
@@ -166,66 +176,85 @@ static int twl_mmc_resume(struct device *dev, int slot)
/*
* Sets the MMC voltage in twl4030
*/
+
+#define MMC1_OCR (MMC_VDD_165_195 \
+ |MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31|MMC_VDD_31_32)
+#define MMC2_OCR (MMC_VDD_165_195 \
+ |MMC_VDD_25_26|MMC_VDD_26_27|MMC_VDD_27_28 \
+ |MMC_VDD_28_29|MMC_VDD_29_30|MMC_VDD_30_31|MMC_VDD_31_32)
+
static int twl_mmc_set_voltage(struct twl_mmc_controller *c, int vdd)
{
int ret;
- u8 vmmc, dev_grp_val;
-
- switch (1 << vdd) {
- case MMC_VDD_35_36:
- case MMC_VDD_34_35:
- case MMC_VDD_33_34:
- case MMC_VDD_32_33:
- case MMC_VDD_31_32:
- case MMC_VDD_30_31:
- if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP)
- vmmc = VMMC1_315V;
- else
- vmmc = VMMC2_315V;
- break;
- case MMC_VDD_29_30:
- if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP)
- vmmc = VMMC1_315V;
- else
- vmmc = VMMC2_300V;
- break;
- case MMC_VDD_27_28:
- case MMC_VDD_26_27:
- if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP)
- vmmc = VMMC1_285V;
- else
- vmmc = VMMC2_285V;
- break;
- case MMC_VDD_25_26:
- case MMC_VDD_24_25:
- case MMC_VDD_23_24:
- case MMC_VDD_22_23:
- case MMC_VDD_21_22:
- case MMC_VDD_20_21:
- if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP)
- vmmc = VMMC1_285V;
- else
- vmmc = VMMC2_260V;
- break;
- case MMC_VDD_165_195:
- if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP)
+ u8 vmmc = 0, dev_grp_val;
+
+ if (!vdd)
+ goto doit;
+
+ if (c->twl_vmmc_dev_grp == VMMC1_DEV_GRP) {
+ /* VMMC1: max 220 mA. And for 8-bit mode,
+ * VSIM: max 50 mA
+ */
+ switch (1 << vdd) {
+ case MMC_VDD_165_195:
vmmc = VMMC1_185V;
- else
+ /* and VSIM_180V */
+ break;
+ case MMC_VDD_28_29:
+ vmmc = VMMC1_285V;
+ /* and VSIM_280V */
+ break;
+ case MMC_VDD_29_30:
+ case MMC_VDD_30_31:
+ vmmc = VMMC1_300V;
+ /* and VSIM_300V */
+ break;
+ case MMC_VDD_31_32:
+ vmmc = VMMC1_315V;
+ /* error if VSIM needed */
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else if (c->twl_vmmc_dev_grp == VMMC2_DEV_GRP) {
+ /* VMMC2: max 100 mA */
+ switch (1 << vdd) {
+ case MMC_VDD_165_195:
vmmc = VMMC2_185V;
- break;
- default:
- vmmc = 0;
- break;
+ break;
+ case MMC_VDD_25_26:
+ case MMC_VDD_26_27:
+ vmmc = VMMC2_260V;
+ break;
+ case MMC_VDD_27_28:
+ vmmc = VMMC2_280V;
+ break;
+ case MMC_VDD_28_29:
+ vmmc = VMMC2_285V;
+ break;
+ case MMC_VDD_29_30:
+ case MMC_VDD_30_31:
+ vmmc = VMMC2_300V;
+ break;
+ case MMC_VDD_31_32:
+ vmmc = VMMC2_315V;
+ break;
+ default:
+ return -EINVAL;
+ }
+ } else {
+ return -EINVAL;
}
- if (vmmc)
+doit:
+ if (vdd)
dev_grp_val = VMMC_DEV_GRP_P1; /* Power up */
else
dev_grp_val = LDO_CLR; /* Power down */
ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
dev_grp_val, c->twl_vmmc_dev_grp);
- if (ret)
+ if (ret || !vdd)
return ret;
ret = twl4030_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
@@ -242,6 +271,14 @@ static int twl_mmc1_set_power(struct device *dev, int slot, int power_on,
struct twl_mmc_controller *c = &hsmmc[0];
struct omap_mmc_platform_data *mmc = dev->platform_data;
+ /*
+ * Assume we power both OMAP VMMC1 (for CMD, CLK, DAT0..3) and the
+ * card using the same TWL VMMC1 supply (hsmmc[0]); 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.
+ */
if (power_on) {
if (cpu_is_omap2430()) {
reg = omap_ctrl_readl(OMAP243X_CONTROL_DEVCONF1);
@@ -298,6 +335,12 @@ static int twl_mmc2_set_power(struct device *dev, int slot, int power_on, int vd
struct twl_mmc_controller *c = &hsmmc[1];
struct omap_mmc_platform_data *mmc = dev->platform_data;
+ /*
+ * Assume TWL VMMC2 (hsmmc[1]) is used only to power the card ... OMAP
+ * VDDS is used to power the pins, optionally with a transceiver to
+ * support cards using voltages other than VDDS (1.8V nominal). When a
+ * transceiver is used, DAT3..7 are muxed as transceiver control pins.
+ */
if (power_on) {
if (mmc->slots[0].internal_clock) {
u32 reg;
@@ -314,6 +357,16 @@ static int twl_mmc2_set_power(struct device *dev, int slot, int power_on, int vd
return ret;
}
+static int twl_mmc3_set_power(struct device *dev, int slot, int power_on,
+ int vdd)
+{
+ /*
+ * Assume MMC3 has self-powered device connected, for example on-board
+ * chip with external power source.
+ */
+ return 0;
+}
+
static struct omap_mmc_platform_data *hsmmc_data[OMAP34XX_NR_MMC] __initdata;
void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
@@ -349,13 +402,13 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
return;
}
- sprintf(twl->name, "mmc%islot%i", c->mmc, 1);
+ if (c->name)
+ strncpy(twl->name, c->name, HSMMC_NAME_LEN);
+ else
+ snprintf(twl->name, ARRAY_SIZE(twl->name),
+ "mmc%islot%i", c->mmc, 1);
mmc->slots[0].name = twl->name;
mmc->nr_slots = 1;
- mmc->slots[0].ocr_mask = MMC_VDD_165_195 |
- MMC_VDD_26_27 | MMC_VDD_27_28 |
- MMC_VDD_29_30 |
- MMC_VDD_30_31 | MMC_VDD_31_32;
mmc->slots[0].wires = c->wires;
mmc->slots[0].internal_clock = !c->ext_clock;
mmc->dma_mask = 0xffffffff;
@@ -369,7 +422,10 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
mmc->slots[0].switch_pin = c->gpio_cd;
mmc->slots[0].card_detect_irq = gpio_to_irq(c->gpio_cd);
- mmc->slots[0].card_detect = twl_mmc_card_detect;
+ if (c->cover_only)
+ mmc->slots[0].get_cover_state = twl_mmc_get_cover_state;
+ else
+ mmc->slots[0].card_detect = twl_mmc_card_detect;
} else
mmc->slots[0].switch_pin = -EINVAL;
@@ -385,24 +441,43 @@ void __init twl4030_mmc_init(struct twl4030_hsmmc_info *controllers)
/* NOTE: we assume OMAP's MMC1 and MMC2 use
* the TWL4030's VMMC1 and VMMC2, respectively;
- * and that OMAP's MMC3 isn't used.
+ * and that MMC3 device has it's own power source.
*/
switch (c->mmc) {
case 1:
mmc->slots[0].set_power = twl_mmc1_set_power;
+ mmc->slots[0].ocr_mask = MMC1_OCR;
break;
case 2:
mmc->slots[0].set_power = twl_mmc2_set_power;
+ if (c->transceiver)
+ mmc->slots[0].ocr_mask = MMC2_OCR;
+ else
+ mmc->slots[0].ocr_mask = MMC_VDD_165_195;
+ break;
+ case 3:
+ mmc->slots[0].set_power = twl_mmc3_set_power;
+ mmc->slots[0].ocr_mask = MMC_VDD_165_195;
break;
default:
pr_err("MMC%d configuration not supported!\n", c->mmc);
+ kfree(mmc);
continue;
}
hsmmc_data[c->mmc - 1] = mmc;
}
omap2_init_mmc(hsmmc_data, OMAP34XX_NR_MMC);
+
+ /* pass the device nodes back to board setup code */
+ for (c = controllers; c->mmc; c++) {
+ struct omap_mmc_platform_data *mmc = hsmmc_data[c->mmc - 1];
+
+ if (!c->mmc || c->mmc > nr_hsmmc)
+ continue;
+ c->dev = mmc->dev;
+ }
}
#endif
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.