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>

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;