iop13xx: surface the iop13xx adma units to the iop-adma driver

Adds the platform device definitions and the architecture specific
support routines (i.e. register initialization and descriptor formats) for the
iop-adma driver.

Changelog:
* added 'descriptor pool size' to the platform data
* add base support for buffer sizes larger than 16MB (hw max)
* build error fix from Kirill A. Shutemov
* rebase for async_tx changes
* add interrupt support
* do not call platform register macros in driver code
* remove unnecessary ARM assembly statement
* checkpatch.pl fixes
* gpl v2 only correction

Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 214 insertions, 3 deletions

diff --git a/arch/arm/mach-iop13xx/setup.c b/arch/arm/mach-iop13xx/setup.c
index bc4871553f6a..bfe0c87e3397 100644
--- a/arch/arm/mach-iop13xx/setup.c
+++ b/arch/arm/mach-iop13xx/setup.c
@@ -25,6 +25,7 @@
 #include <asm/hardware.h>
 #include <asm/irq.h>
 #include <asm/io.h>
+#include <asm/hardware/iop_adma.h>
 
 #define IOP13XX_UART_XTAL 33334000
 #define IOP13XX_SETUP_DEBUG 0
@@ -236,19 +237,143 @@ static unsigned long iq8134x_probe_flash_size(void)
 }
 #endif
 
+/* ADMA Channels */
+static struct resource iop13xx_adma_0_resources[] = {
+        [0] = {
+                .start = IOP13XX_ADMA_PHYS_BASE(0),
+                .end = IOP13XX_ADMA_UPPER_PA(0),
+                .flags = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start = IRQ_IOP13XX_ADMA0_EOT,
+                .end = IRQ_IOP13XX_ADMA0_EOT,
+                .flags = IORESOURCE_IRQ
+        },
+        [2] = {
+                .start = IRQ_IOP13XX_ADMA0_EOC,
+                .end = IRQ_IOP13XX_ADMA0_EOC,
+                .flags = IORESOURCE_IRQ
+        },
+        [3] = {
+                .start = IRQ_IOP13XX_ADMA0_ERR,
+                .end = IRQ_IOP13XX_ADMA0_ERR,
+                .flags = IORESOURCE_IRQ
+        }
+};
+
+static struct resource iop13xx_adma_1_resources[] = {
+        [0] = {
+                .start = IOP13XX_ADMA_PHYS_BASE(1),
+                .end = IOP13XX_ADMA_UPPER_PA(1),
+                .flags = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start = IRQ_IOP13XX_ADMA1_EOT,
+                .end = IRQ_IOP13XX_ADMA1_EOT,
+                .flags = IORESOURCE_IRQ
+        },
+        [2] = {
+                .start = IRQ_IOP13XX_ADMA1_EOC,
+                .end = IRQ_IOP13XX_ADMA1_EOC,
+                .flags = IORESOURCE_IRQ
+        },
+        [3] = {
+                .start = IRQ_IOP13XX_ADMA1_ERR,
+                .end = IRQ_IOP13XX_ADMA1_ERR,
+                .flags = IORESOURCE_IRQ
+        }
+};
+
+static struct resource iop13xx_adma_2_resources[] = {
+        [0] = {
+                .start = IOP13XX_ADMA_PHYS_BASE(2),
+                .end = IOP13XX_ADMA_UPPER_PA(2),
+                .flags = IORESOURCE_MEM,
+        },
+        [1] = {
+                .start = IRQ_IOP13XX_ADMA2_EOT,
+                .end = IRQ_IOP13XX_ADMA2_EOT,
+                .flags = IORESOURCE_IRQ
+        },
+        [2] = {
+                .start = IRQ_IOP13XX_ADMA2_EOC,
+                .end = IRQ_IOP13XX_ADMA2_EOC,
+                .flags = IORESOURCE_IRQ
+        },
+        [3] = {
+                .start = IRQ_IOP13XX_ADMA2_ERR,
+                .end = IRQ_IOP13XX_ADMA2_ERR,
+                .flags = IORESOURCE_IRQ
+        }
+};
+
+static u64 iop13xx_adma_dmamask = DMA_64BIT_MASK;
+static struct iop_adma_platform_data iop13xx_adma_0_data = {
+        .hw_id = 0,
+        .pool_size = PAGE_SIZE,
+};
+
+static struct iop_adma_platform_data iop13xx_adma_1_data = {
+        .hw_id = 1,
+        .pool_size = PAGE_SIZE,
+};
+
+static struct iop_adma_platform_data iop13xx_adma_2_data = {
+        .hw_id = 2,
+        .pool_size = PAGE_SIZE,
+};
+
+/* The ids are fixed up later in iop13xx_platform_init */
+static struct platform_device iop13xx_adma_0_channel = {
+        .name = "iop-adma",
+        .id = 0,
+        .num_resources = 4,
+        .resource = iop13xx_adma_0_resources,
+        .dev = {
+                .dma_mask = &iop13xx_adma_dmamask,
+                .coherent_dma_mask = DMA_64BIT_MASK,
+                .platform_data = (void *) &iop13xx_adma_0_data,
+        },
+};
+
+static struct platform_device iop13xx_adma_1_channel = {
+        .name = "iop-adma",
+        .id = 0,
+        .num_resources = 4,
+        .resource = iop13xx_adma_1_resources,
+        .dev = {
+                .dma_mask = &iop13xx_adma_dmamask,
+                .coherent_dma_mask = DMA_64BIT_MASK,
+                .platform_data = (void *) &iop13xx_adma_1_data,
+        },
+};
+
+static struct platform_device iop13xx_adma_2_channel = {
+        .name = "iop-adma",
+        .id = 0,
+        .num_resources = 4,
+        .resource = iop13xx_adma_2_resources,
+        .dev = {
+                .dma_mask = &iop13xx_adma_dmamask,
+                .coherent_dma_mask = DMA_64BIT_MASK,
+                .platform_data = (void *) &iop13xx_adma_2_data,
+        },
+};
+
 void __init iop13xx_map_io(void)
 {
         /* Initialize the Static Page Table maps */
         iotable_init(iop13xx_std_desc, ARRAY_SIZE(iop13xx_std_desc));
 }
 
-static int init_uart = 0;
-static int init_i2c = 0;
+static int init_uart;
+static int init_i2c;
+static int init_adma;
 
 void __init iop13xx_platform_init(void)
 {
         int i;
-        u32 uart_idx, i2c_idx, plat_idx;
+        u32 uart_idx, i2c_idx, adma_idx, plat_idx;
         struct platform_device *iop13xx_devices[IQ81340_MAX_PLAT_DEVICES];
 
         /* set the bases so we can read the device id */
@@ -294,6 +419,12 @@ void __init iop13xx_platform_init(void)
                 }
         }
 
+        if (init_adma == IOP13XX_INIT_ADMA_DEFAULT) {
+                init_adma |= IOP13XX_INIT_ADMA_0;
+                init_adma |= IOP13XX_INIT_ADMA_1;
+                init_adma |= IOP13XX_INIT_ADMA_2;
+        }
+
         plat_idx = 0;
         uart_idx = 0;
         i2c_idx = 0;
@@ -332,6 +463,56 @@ void __init iop13xx_platform_init(void)
                 }
         }
 
+        /* initialize adma channel ids and capabilities */
+        adma_idx = 0;
+        for (i = 0; i < IQ81340_NUM_ADMA; i++) {
+                struct iop_adma_platform_data *plat_data;
+                if ((init_adma & (1 << i)) && IOP13XX_SETUP_DEBUG)
+                        printk(KERN_INFO
+                                "Adding adma%d to platform device list\n", i);
+                switch (init_adma & (1 << i)) {
+                case IOP13XX_INIT_ADMA_0:
+                        iop13xx_adma_0_channel.id = adma_idx++;
+                        iop13xx_devices[plat_idx++] = &iop13xx_adma_0_channel;
+                        plat_data = &iop13xx_adma_0_data;
+                        dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
+                        dma_cap_set(DMA_XOR, plat_data->cap_mask);
+                        dma_cap_set(DMA_DUAL_XOR, plat_data->cap_mask);
+                        dma_cap_set(DMA_ZERO_SUM, plat_data->cap_mask);
+                        dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
+                        dma_cap_set(DMA_MEMCPY_CRC32C, plat_data->cap_mask);
+                        dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
+                        break;
+                case IOP13XX_INIT_ADMA_1:
+                        iop13xx_adma_1_channel.id = adma_idx++;
+                        iop13xx_devices[plat_idx++] = &iop13xx_adma_1_channel;
+                        plat_data = &iop13xx_adma_1_data;
+                        dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
+                        dma_cap_set(DMA_XOR, plat_data->cap_mask);
+                        dma_cap_set(DMA_DUAL_XOR, plat_data->cap_mask);
+                        dma_cap_set(DMA_ZERO_SUM, plat_data->cap_mask);
+                        dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
+                        dma_cap_set(DMA_MEMCPY_CRC32C, plat_data->cap_mask);
+                        dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
+                        break;
+                case IOP13XX_INIT_ADMA_2:
+                        iop13xx_adma_2_channel.id = adma_idx++;
+                        iop13xx_devices[plat_idx++] = &iop13xx_adma_2_channel;
+                        plat_data = &iop13xx_adma_2_data;
+                        dma_cap_set(DMA_MEMCPY, plat_data->cap_mask);
+                        dma_cap_set(DMA_XOR, plat_data->cap_mask);
+                        dma_cap_set(DMA_DUAL_XOR, plat_data->cap_mask);
+                        dma_cap_set(DMA_ZERO_SUM, plat_data->cap_mask);
+                        dma_cap_set(DMA_MEMSET, plat_data->cap_mask);
+                        dma_cap_set(DMA_MEMCPY_CRC32C, plat_data->cap_mask);
+                        dma_cap_set(DMA_INTERRUPT, plat_data->cap_mask);
+                        dma_cap_set(DMA_PQ_XOR, plat_data->cap_mask);
+                        dma_cap_set(DMA_PQ_UPDATE, plat_data->cap_mask);
+                        dma_cap_set(DMA_PQ_ZERO_SUM, plat_data->cap_mask);
+                        break;
+                }
+        }
+
 #ifdef CONFIG_MTD_PHYSMAP
         iq8134x_flash_resource.end = iq8134x_flash_resource.start +
                                 iq8134x_probe_flash_size() - 1;
@@ -399,5 +580,35 @@ static int __init iop13xx_init_i2c_setup(char *str)
         return 1;
 }
 
+static int __init iop13xx_init_adma_setup(char *str)
+{
+        if (str)        {
+                while (*str != '\0') {
+                        switch (*str) {
+                        case '0':
+                                init_adma |= IOP13XX_INIT_ADMA_0;
+                                break;
+                        case '1':
+                                init_adma |= IOP13XX_INIT_ADMA_1;
+                                break;
+                        case '2':
+                                init_adma |= IOP13XX_INIT_ADMA_2;
+                                break;
+                        case ',':
+                        case '=':
+                                break;
+                        default:
+                                PRINTK("\"iop13xx_init_adma\" malformed"
+                                            " at character: \'%c\'", *str);
+                                *(str + 1) = '\0';
+                                init_adma = IOP13XX_INIT_ADMA_DEFAULT;
+                        }
+                        str++;
+                }
+        }
+        return 1;
+}
+
+__setup("iop13xx_init_adma", iop13xx_init_adma_setup);
 __setup("iop13xx_init_uart", iop13xx_init_uart_setup);
 __setup("iop13xx_init_i2c", iop13xx_init_i2c_setup);