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authorManuel Lauss <manuel.lauss@googlemail.com>2011-11-10 12:06:22 +0000
committerRalf Baechle <ralf@linux-mips.org>2011-12-07 22:02:07 +0000
commitc9af5144ce5e6270a8bffad348cf2f20648f5f67 (patch)
tree450082958bdd2aecb968f8cfd76fc1d0d21dd637 /arch/mips
parentf59c811f8c44e60a59783e3337594da638a48dff (diff)
MIPS: Alchemy: MMC for DB1100
This patch hooks up the 2 MMC sockets on the DB1100 board. Signed-off-by: Manuel Lauss <manuel.lauss@googlemail.com> To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/2873/ Patchwork: https://patchwork.linux-mips.org/patch/2920/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/alchemy/devboards/db1000.c202
1 files changed, 202 insertions, 0 deletions
diff --git a/arch/mips/alchemy/devboards/db1000.c b/arch/mips/alchemy/devboards/db1000.c
index 57ed5f1c491..a3a44803303 100644
--- a/arch/mips/alchemy/devboards/db1000.c
+++ b/arch/mips/alchemy/devboards/db1000.c
@@ -23,10 +23,14 @@
#include <linux/gpio.h>
#include <linux/init.h>
#include <linux/interrupt.h>
+#include <linux/leds.h>
+#include <linux/mmc/host.h>
+#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/au1000_dma.h>
+#include <asm/mach-au1x00/au1100_mmc.h>
#include <asm/mach-db1x00/bcsr.h>
#include <asm/reboot.h>
#include <prom.h>
@@ -194,6 +198,198 @@ static struct platform_device db1x00_audio_dev = {
.name = "db1000-audio",
};
+/******************************************************************************/
+
+static irqreturn_t db1100_mmc_cd(int irq, void *ptr)
+{
+ void (*mmc_cd)(struct mmc_host *, unsigned long);
+ /* link against CONFIG_MMC=m */
+ mmc_cd = symbol_get(mmc_detect_change);
+ mmc_cd(ptr, msecs_to_jiffies(500));
+ symbol_put(mmc_detect_change);
+
+ return IRQ_HANDLED;
+}
+
+static int db1100_mmc_cd_setup(void *mmc_host, int en)
+{
+ int ret = 0;
+
+ if (en) {
+ irq_set_irq_type(AU1100_GPIO19_INT, IRQ_TYPE_EDGE_BOTH);
+ ret = request_irq(AU1100_GPIO19_INT, db1100_mmc_cd, 0,
+ "sd0_cd", mmc_host);
+ } else
+ free_irq(AU1100_GPIO19_INT, mmc_host);
+ return ret;
+}
+
+static int db1100_mmc1_cd_setup(void *mmc_host, int en)
+{
+ int ret = 0;
+
+ if (en) {
+ irq_set_irq_type(AU1100_GPIO20_INT, IRQ_TYPE_EDGE_BOTH);
+ ret = request_irq(AU1100_GPIO20_INT, db1100_mmc_cd, 0,
+ "sd1_cd", mmc_host);
+ } else
+ free_irq(AU1100_GPIO20_INT, mmc_host);
+ return ret;
+}
+
+static int db1100_mmc_card_readonly(void *mmc_host)
+{
+ /* testing suggests that this bit is inverted */
+ return (bcsr_read(BCSR_STATUS) & BCSR_STATUS_SD0WP) ? 0 : 1;
+}
+
+static int db1100_mmc_card_inserted(void *mmc_host)
+{
+ return !alchemy_gpio_get_value(19);
+}
+
+static void db1100_mmc_set_power(void *mmc_host, int state)
+{
+ if (state) {
+ bcsr_mod(BCSR_BOARD, 0, BCSR_BOARD_SD0PWR);
+ msleep(400); /* stabilization time */
+ } else
+ bcsr_mod(BCSR_BOARD, BCSR_BOARD_SD0PWR, 0);
+}
+
+static void db1100_mmcled_set(struct led_classdev *led, enum led_brightness b)
+{
+ if (b != LED_OFF)
+ bcsr_mod(BCSR_LEDS, BCSR_LEDS_LED0, 0);
+ else
+ bcsr_mod(BCSR_LEDS, 0, BCSR_LEDS_LED0);
+}
+
+static struct led_classdev db1100_mmc_led = {
+ .brightness_set = db1100_mmcled_set,
+};
+
+static int db1100_mmc1_card_readonly(void *mmc_host)
+{
+ return (bcsr_read(BCSR_BOARD) & BCSR_BOARD_SD1WP) ? 1 : 0;
+}
+
+static int db1100_mmc1_card_inserted(void *mmc_host)
+{
+ return !alchemy_gpio_get_value(20);
+}
+
+static void db1100_mmc1_set_power(void *mmc_host, int state)
+{
+ if (state) {
+ bcsr_mod(BCSR_BOARD, 0, BCSR_BOARD_SD1PWR);
+ msleep(400); /* stabilization time */
+ } else
+ bcsr_mod(BCSR_BOARD, BCSR_BOARD_SD1PWR, 0);
+}
+
+static void db1100_mmc1led_set(struct led_classdev *led, enum led_brightness b)
+{
+ if (b != LED_OFF)
+ bcsr_mod(BCSR_LEDS, BCSR_LEDS_LED1, 0);
+ else
+ bcsr_mod(BCSR_LEDS, 0, BCSR_LEDS_LED1);
+}
+
+static struct led_classdev db1100_mmc1_led = {
+ .brightness_set = db1100_mmc1led_set,
+};
+
+static struct au1xmmc_platform_data db1100_mmc_platdata[2] = {
+ [0] = {
+ .cd_setup = db1100_mmc_cd_setup,
+ .set_power = db1100_mmc_set_power,
+ .card_inserted = db1100_mmc_card_inserted,
+ .card_readonly = db1100_mmc_card_readonly,
+ .led = &db1100_mmc_led,
+ },
+ [1] = {
+ .cd_setup = db1100_mmc1_cd_setup,
+ .set_power = db1100_mmc1_set_power,
+ .card_inserted = db1100_mmc1_card_inserted,
+ .card_readonly = db1100_mmc1_card_readonly,
+ .led = &db1100_mmc1_led,
+ },
+};
+
+static struct resource au1100_mmc0_resources[] = {
+ [0] = {
+ .start = AU1100_SD0_PHYS_ADDR,
+ .end = AU1100_SD0_PHYS_ADDR + 0xfff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = AU1100_SD_INT,
+ .end = AU1100_SD_INT,
+ .flags = IORESOURCE_IRQ,
+ },
+ [2] = {
+ .start = DMA_ID_SD0_TX,
+ .end = DMA_ID_SD0_TX,
+ .flags = IORESOURCE_DMA,
+ },
+ [3] = {
+ .start = DMA_ID_SD0_RX,
+ .end = DMA_ID_SD0_RX,
+ .flags = IORESOURCE_DMA,
+ }
+};
+
+static u64 au1xxx_mmc_dmamask = DMA_BIT_MASK(32);
+
+static struct platform_device db1100_mmc0_dev = {
+ .name = "au1xxx-mmc",
+ .id = 0,
+ .dev = {
+ .dma_mask = &au1xxx_mmc_dmamask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ .platform_data = &db1100_mmc_platdata[0],
+ },
+ .num_resources = ARRAY_SIZE(au1100_mmc0_resources),
+ .resource = au1100_mmc0_resources,
+};
+
+static struct resource au1100_mmc1_res[] = {
+ [0] = {
+ .start = AU1100_SD1_PHYS_ADDR,
+ .end = AU1100_SD1_PHYS_ADDR + 0xfff,
+ .flags = IORESOURCE_MEM,
+ },
+ [1] = {
+ .start = AU1100_SD_INT,
+ .end = AU1100_SD_INT,
+ .flags = IORESOURCE_IRQ,
+ },
+ [2] = {
+ .start = DMA_ID_SD1_TX,
+ .end = DMA_ID_SD1_TX,
+ .flags = IORESOURCE_DMA,
+ },
+ [3] = {
+ .start = DMA_ID_SD1_RX,
+ .end = DMA_ID_SD1_RX,
+ .flags = IORESOURCE_DMA,
+ }
+};
+
+static struct platform_device db1100_mmc1_dev = {
+ .name = "au1xxx-mmc",
+ .id = 1,
+ .dev = {
+ .dma_mask = &au1xxx_mmc_dmamask,
+ .coherent_dma_mask = DMA_BIT_MASK(32),
+ .platform_data = &db1100_mmc_platdata[1],
+ },
+ .num_resources = ARRAY_SIZE(au1100_mmc1_res),
+ .resource = au1100_mmc1_res,
+};
+
+
static struct platform_device *db1x00_devs[] = {
&db1x00_codec_dev,
&alchemy_ac97c_dma_dev,
@@ -203,6 +399,8 @@ static struct platform_device *db1x00_devs[] = {
static struct platform_device *db1100_devs[] = {
&au1100_lcd_device,
+ &db1100_mmc0_dev,
+ &db1100_mmc1_dev,
};
static int __init db1000_dev_init(void)
@@ -224,6 +422,10 @@ static int __init db1000_dev_init(void)
d1 = AU1100_GPIO3_INT;
s0 = AU1100_GPIO1_INT;
s1 = AU1100_GPIO4_INT;
+
+ gpio_direction_input(19); /* sd0 cd# */
+ gpio_direction_input(20); /* sd1 cd# */
+
platform_add_devices(db1100_devs, ARRAY_SIZE(db1100_devs));
} else if (board == BCSR_WHOAMI_DB1000) {
c0 = AU1000_GPIO2_INT;