ARM: mach-shmobile: ap4evb: Add FSI2 support

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 132 insertions, 3 deletions

diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 5c41b958e022..8fb51f5157f9 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -32,11 +32,15 @@
 #include <linux/i2c/tsc2007.h>
 #include <linux/io.h>
 #include <linux/smsc911x.h>
+#include <linux/sh_intc.h>
+#include <linux/sh_clk.h>
 #include <linux/gpio.h>
 #include <linux/input.h>
 #include <linux/input/sh_keysc.h>
 #include <linux/usb/r8a66597.h>
 
+#include <sound/sh_fsi.h>
+
 #include <video/sh_mobile_lcdc.h>
 #include <video/sh_mipi_dsi.h>
 
@@ -113,6 +117,13 @@
  * S39: bit2: off
  */
 
+/*
+ * FSI/FSMI
+ *
+ * SW41 :  ON : SH-Mobile AP4 Audio Mode
+ *      : OFF : Bluetooth Audio Mode
+ */
+
 /* MTD */
 static struct mtd_partition nor_flash_partitions[] = {
         {
@@ -373,6 +384,60 @@ static struct platform_device mipidsi0_device = {
         },
 };
 
+/* FSI */
+#define IRQ_FSI         evt2irq(0x1840)
+#define FSIACKCR        0xE6150018
+static void fsiackcr_init(struct clk *clk)
+{
+        u32 status = __raw_readl(clk->enable_reg);
+
+        /* use external clock */
+        status &= ~0x000000ff;
+        status |= 0x00000080;
+        __raw_writel(status, clk->enable_reg);
+}
+
+static struct clk_ops fsiackcr_clk_ops = {
+        .init = fsiackcr_init,
+};
+
+static struct clk fsiackcr_clk = {
+        .ops            = &fsiackcr_clk_ops,
+        .enable_reg     = (void __iomem *)FSIACKCR,
+        .rate           = 0, /* unknown */
+};
+
+struct sh_fsi_platform_info fsi_info = {
+        .porta_flags = SH_FSI_BRS_INV |
+                       SH_FSI_OUT_SLAVE_MODE |
+                       SH_FSI_IN_SLAVE_MODE |
+                       SH_FSI_OFMT(PCM) |
+                       SH_FSI_IFMT(PCM),
+};
+
+static struct resource fsi_resources[] = {
+        [0] = {
+                .name   = "FSI",
+                .start  = 0xFE3C0000,
+                .end    = 0xFE3C0400 - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start  = IRQ_FSI,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static struct platform_device fsi_device = {
+        .name           = "sh_fsi2",
+        .id             = 0,
+        .num_resources  = ARRAY_SIZE(fsi_resources),
+        .resource       = fsi_resources,
+        .dev    = {
+                .platform_data  = &fsi_info,
+        },
+};
+
 static struct platform_device *ap4evb_devices[] __initdata = {
         &nor_flash_device,
         &smc911x_device,
@@ -381,6 +446,7 @@ static struct platform_device *ap4evb_devices[] __initdata = {
         &usb1_host_device,
         &lcdc_device,
         &mipidsi0_device,
+        &fsi_device,
 };
 
 /* TouchScreen (Needs SW3 set to OFF) */
@@ -391,6 +457,12 @@ struct tsc2007_platform_data tsc2007_info = {
 };
 
 /* I2C */
+static struct i2c_board_info i2c0_devices[] = {
+        {
+                I2C_BOARD_INFO("ak4643", 0x13),
+        },
+};
+
 static struct i2c_board_info i2c1_devices[] = {
         {
                 I2C_BOARD_INFO("r2025sd", 0x32),
@@ -463,8 +535,27 @@ eclkdsitxget:
 
 device_initcall(ap4evb_init_display_clk);
 
+/*
+ * FIXME !!
+ *
+ * gpio_no_direction is quick_hack.
+ *
+ * current gpio frame work doesn't have
+ * the method to control only pull up/down/free.
+ * this function should be replaced by correct gpio function
+ */
+static void __init gpio_no_direction(u32 addr)
+{
+        __raw_writeb(0x00, addr);
+}
+
+#define GPIO_PORT9CR    0xE6051009
+#define GPIO_PORT10CR   0xE605100A
+
 static void __init ap4evb_init(void)
 {
+        struct clk *clk;
+
         sh7372_pinmux_init();
 
         /* enable SCIFA0 */
@@ -529,9 +620,6 @@ static void __init ap4evb_init(void)
         gpio_request(GPIO_FN_IRQ28_123, NULL);
         set_irq_type(IRQ28, IRQ_TYPE_LEVEL_LOW);
 
-        i2c_register_board_info(1, i2c1_devices,
-                                ARRAY_SIZE(i2c1_devices));
-
         /* USB enable */
         gpio_request(GPIO_FN_VBUS0_1,    NULL);
         gpio_request(GPIO_FN_IDIN_1_18,  NULL);
@@ -543,6 +631,47 @@ static void __init ap4evb_init(void)
         /* setup USB phy */
         __raw_writew(0x8a0a, 0xE6058130);       /* USBCR2 */
 
+        /* enable FSI2 */
+        gpio_request(GPIO_FN_FSIAIBT,   NULL);
+        gpio_request(GPIO_FN_FSIAILR,   NULL);
+        gpio_request(GPIO_FN_FSIAISLD,  NULL);
+        gpio_request(GPIO_FN_FSIAOSLD,  NULL);
+        gpio_request(GPIO_PORT161,      NULL);
+        gpio_direction_output(GPIO_PORT161, 0); /* slave */
+
+        gpio_request(GPIO_PORT9, NULL);
+        gpio_request(GPIO_PORT10, NULL);
+        gpio_no_direction(GPIO_PORT9CR);  /* FSIAOBT needs no direction */
+        gpio_no_direction(GPIO_PORT10CR); /* FSIAOLR needs no direction */
+
+        /* set SPU2 clock to 119.6 MHz */
+        clk = clk_get(NULL, "spu_clk");
+        if (!IS_ERR_VALUE(clk)) {
+                clk_set_rate(clk, clk_round_rate(clk, 119600000));
+                clk_put(clk);
+        }
+
+        /* change parent of FSI A */
+        clk = clk_get(NULL, "fsia_clk");
+        if (!IS_ERR_VALUE(clk)) {
+                clk_register(&fsiackcr_clk);
+                clk_set_parent(clk, &fsiackcr_clk);
+                clk_put(clk);
+        }
+
+        /*
+         * set irq priority, to avoid sound chopping
+         * when NFS rootfs is used
+         *  FSI(3) > SMSC911X(2)
+         */
+        intc_set_priority(IRQ_FSI, 3);
+
+        i2c_register_board_info(0, i2c0_devices,
+                                ARRAY_SIZE(i2c0_devices));
+
+        i2c_register_board_info(1, i2c1_devices,
+                                ARRAY_SIZE(i2c1_devices));
+
         sh7372_add_standard_devices();
 
         platform_add_devices(ap4evb_devices, ARRAY_SIZE(ap4evb_devices));