ARM: shmobile: r8a7778: add HPB-DMAC support

Add HPB-DMAC platform device on R8A7778 SoC along with its slave and channel
configurations (only for SDHI0 so far).

Signed-off-by: Max Filippov <max.filippov@cogentembedded.com>
[Sergei: moved *enum* declaring HPB-DMAC slave IDs from now removed <mach/dma.h>
to <mach/r8a7778.h>, removed #include <mach/dma.h> from setup-r8a7778.c, removed
SSI-related *enum* values and SSI-related data from hpb_dmae_slaves[] and
hpb_dmae_channels[], moved the comments after the element initializers of
hpb_dmae_channels[].]
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

2 files changed, 93 insertions, 0 deletions

diff --git a/arch/arm/mach-shmobile/include/mach/r8a7778.h b/arch/arm/mach-shmobile/include/mach/r8a7778.h
index ea1dca6880f4..1d6fe973e8b4 100644
--- a/arch/arm/mach-shmobile/include/mach/r8a7778.h
+++ b/arch/arm/mach-shmobile/include/mach/r8a7778.h
@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 2013  Renesas Solutions Corp.
  * Copyright (C) 2013  Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
+ * Copyright (C) 2013  Cogent Embedded, Inc.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,6 +22,13 @@
 #include <linux/sh_eth.h>
 #include <linux/platform_data/camera-rcar.h>
 
+/* HPB-DMA slave IDs */
+enum {
+        HPBDMA_SLAVE_DUMMY,
+        HPBDMA_SLAVE_SDHI0_TX,
+        HPBDMA_SLAVE_SDHI0_RX,
+};
+
 extern void r8a7778_add_standard_devices(void);
 extern void r8a7778_add_standard_devices_dt(void);
 extern void r8a7778_add_ether_device(struct sh_eth_plat_data *pdata);
diff --git a/arch/arm/mach-shmobile/setup-r8a7778.c b/arch/arm/mach-shmobile/setup-r8a7778.c
index e484d1420a01..fa1b7e44a973 100644
--- a/arch/arm/mach-shmobile/setup-r8a7778.c
+++ b/arch/arm/mach-shmobile/setup-r8a7778.c
@@ -24,6 +24,7 @@
 #include <linux/irqchip/arm-gic.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
+#include <linux/platform_data/dma-rcar-hpbdma.h>
 #include <linux/platform_data/gpio-rcar.h>
 #include <linux/platform_data/irq-renesas-intc-irqpin.h>
 #include <linux/platform_device.h>
@@ -356,6 +357,88 @@ void __init r8a7778_add_dt_devices(void)
         r8a7778_register_tmu(1);
 }
 
+/* HPB-DMA */
+
+/* Asynchronous mode register (ASYNCMDR) bits */
+#define HPB_DMAE_ASYNCMDR_ASMD22_MASK   BIT(2)  /* SDHI0 */
+#define HPB_DMAE_ASYNCMDR_ASMD22_SINGLE BIT(2)  /* SDHI0 */
+#define HPB_DMAE_ASYNCMDR_ASMD22_MULTI  0       /* SDHI0 */
+#define HPB_DMAE_ASYNCMDR_ASMD21_MASK   BIT(1)  /* SDHI0 */
+#define HPB_DMAE_ASYNCMDR_ASMD21_SINGLE BIT(1)  /* SDHI0 */
+#define HPB_DMAE_ASYNCMDR_ASMD21_MULTI  0       /* SDHI0 */
+
+static const struct hpb_dmae_slave_config hpb_dmae_slaves[] = {
+        {
+                .id     = HPBDMA_SLAVE_SDHI0_TX,
+                .addr   = 0xffe4c000 + 0x30,
+                .dcr    = HPB_DMAE_DCR_SPDS_16BIT |
+                          HPB_DMAE_DCR_DMDL |
+                          HPB_DMAE_DCR_DPDS_16BIT,
+                .rstr   = HPB_DMAE_ASYNCRSTR_ASRST21 |
+                          HPB_DMAE_ASYNCRSTR_ASRST22 |
+                          HPB_DMAE_ASYNCRSTR_ASRST23,
+                .mdr    = HPB_DMAE_ASYNCMDR_ASMD21_MULTI,
+                .mdm    = HPB_DMAE_ASYNCMDR_ASMD21_MASK,
+                .port   = 0x0D0C,
+                .flags  = HPB_DMAE_SET_ASYNC_RESET | HPB_DMAE_SET_ASYNC_MODE,
+                .dma_ch = 21,
+        }, {
+                .id     = HPBDMA_SLAVE_SDHI0_RX,
+                .addr   = 0xffe4c000 + 0x30,
+                .dcr    = HPB_DMAE_DCR_SMDL |
+                          HPB_DMAE_DCR_SPDS_16BIT |
+                          HPB_DMAE_DCR_DPDS_16BIT,
+                .rstr   = HPB_DMAE_ASYNCRSTR_ASRST21 |
+                          HPB_DMAE_ASYNCRSTR_ASRST22 |
+                          HPB_DMAE_ASYNCRSTR_ASRST23,
+                .mdr    = HPB_DMAE_ASYNCMDR_ASMD22_MULTI,
+                .mdm    = HPB_DMAE_ASYNCMDR_ASMD22_MASK,
+                .port   = 0x0D0C,
+                .flags  = HPB_DMAE_SET_ASYNC_RESET | HPB_DMAE_SET_ASYNC_MODE,
+                .dma_ch = 22,
+        },
+};
+
+static const struct hpb_dmae_channel hpb_dmae_channels[] = {
+        HPB_DMAE_CHANNEL(0x7e, HPBDMA_SLAVE_SDHI0_TX), /* ch. 21 */
+        HPB_DMAE_CHANNEL(0x7e, HPBDMA_SLAVE_SDHI0_RX), /* ch. 22 */
+};
+
+static struct hpb_dmae_pdata dma_platform_data __initdata = {
+        .slaves                 = hpb_dmae_slaves,
+        .num_slaves             = ARRAY_SIZE(hpb_dmae_slaves),
+        .channels               = hpb_dmae_channels,
+        .num_channels           = ARRAY_SIZE(hpb_dmae_channels),
+        .ts_shift               = {
+                [XMIT_SZ_8BIT]  = 0,
+                [XMIT_SZ_16BIT] = 1,
+                [XMIT_SZ_32BIT] = 2,
+        },
+        .num_hw_channels        = 39,
+};
+
+static struct resource hpb_dmae_resources[] __initdata = {
+        /* Channel registers */
+        DEFINE_RES_MEM(0xffc08000, 0x1000),
+        /* Common registers */
+        DEFINE_RES_MEM(0xffc09000, 0x170),
+        /* Asynchronous reset registers */
+        DEFINE_RES_MEM(0xffc00300, 4),
+        /* Asynchronous mode registers */
+        DEFINE_RES_MEM(0xffc00400, 4),
+        /* IRQ for DMA channels */
+        DEFINE_RES_NAMED(gic_iid(0x7b), 5, NULL, IORESOURCE_IRQ),
+};
+
+static void __init r8a7778_register_hpb_dmae(void)
+{
+        platform_device_register_resndata(&platform_bus, "hpb-dma-engine", -1,
+                                          hpb_dmae_resources,
+                                          ARRAY_SIZE(hpb_dmae_resources),
+                                          &dma_platform_data,
+                                          sizeof(dma_platform_data));
+}
+
 void __init r8a7778_add_standard_devices(void)
 {
         r8a7778_add_dt_devices();
@@ -366,6 +449,8 @@ void __init r8a7778_add_standard_devices(void)
         r8a7778_register_hspi(0);
         r8a7778_register_hspi(1);
         r8a7778_register_hspi(2);
+
+        r8a7778_register_hpb_dmae();
 }
 
 void __init r8a7778_init_late(void)