MIPS: TXx9: Add DMAC support

Add platform support for DMAC of TXx9 SoCs.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

11 files changed, 112 insertions, 10 deletions

diff --git a/arch/mips/include/asm/txx9/dmac.h b/arch/mips/include/asm/txx9/dmac.h
index a87d1c3e4f5b..5e9151fccbb4 100644
--- a/arch/mips/include/asm/txx9/dmac.h
+++ b/arch/mips/include/asm/txx9/dmac.h
@@ -45,4 +45,7 @@ struct txx9dmac_slave {
         unsigned int    reg_width;
 };
 
+void txx9_dmac_init(int id, unsigned long baseaddr, int irq,
+                    const struct txx9dmac_platform_data *pdata);
+
 #endif /* __ASM_TXX9_DMAC_H */
diff --git a/arch/mips/include/asm/txx9/tx4927.h b/arch/mips/include/asm/txx9/tx4927.h
index 7d813f1cb98d..d92ae07000d3 100644
--- a/arch/mips/include/asm/txx9/tx4927.h
+++ b/arch/mips/include/asm/txx9/tx4927.h
@@ -41,6 +41,7 @@
 
 #define TX4927_SDRAMC_REG       (TX4927_REG_BASE + 0x8000)
 #define TX4927_EBUSC_REG        (TX4927_REG_BASE + 0x9000)
+#define TX4927_DMA_REG          (TX4927_REG_BASE + 0xb000)
 #define TX4927_PCIC_REG         (TX4927_REG_BASE + 0xd000)
 #define TX4927_CCFG_REG         (TX4927_REG_BASE + 0xe000)
 #define TX4927_IRC_REG          (TX4927_REG_BASE + 0xf600)
@@ -265,5 +266,6 @@ int tx4927_pciclk66_setup(void);
 void tx4927_setup_pcierr_irq(void);
 void tx4927_irq_init(void);
 void tx4927_mtd_init(int ch);
+void tx4927_dmac_init(int memcpy_chan);
 
 #endif /* __ASM_TXX9_TX4927_H */
diff --git a/arch/mips/include/asm/txx9/tx4938.h b/arch/mips/include/asm/txx9/tx4938.h
index cd8bc2021755..0758a0c411b1 100644
--- a/arch/mips/include/asm/txx9/tx4938.h
+++ b/arch/mips/include/asm/txx9/tx4938.h
@@ -305,5 +305,6 @@ struct tx4938ide_platform_info {
 };
 
 void tx4938_ata_init(unsigned int irq, unsigned int shift, int tune);
+void tx4938_dmac_init(int memcpy_chan0, int memcpy_chan1);
 
 #endif
diff --git a/arch/mips/include/asm/txx9/tx4939.h b/arch/mips/include/asm/txx9/tx4939.h
index f02c50b3abfb..1be9798a26b5 100644
--- a/arch/mips/include/asm/txx9/tx4939.h
+++ b/arch/mips/include/asm/txx9/tx4939.h
@@ -544,5 +544,6 @@ void tx4939_ata_init(void);
 void tx4939_rtc_init(void);
 void tx4939_ndfmc_init(unsigned int hold, unsigned int spw,
                        unsigned char ch_mask, unsigned char wide_mask);
+void tx4939_dmac_init(int memcpy_chan0, int memcpy_chan1);
 
 #endif /* __ASM_TXX9_TX4939_H */
diff --git a/arch/mips/txx9/generic/setup.c b/arch/mips/txx9/generic/setup.c
index 8a266c6a3f58..369d8637217d 100644
--- a/arch/mips/txx9/generic/setup.c
+++ b/arch/mips/txx9/generic/setup.c
@@ -33,6 +33,7 @@
 #include <asm/txx9/pci.h>
 #include <asm/txx9tmr.h>
 #include <asm/txx9/ndfmc.h>
+#include <asm/txx9/dmac.h>
 #ifdef CONFIG_CPU_TX49XX
 #include <asm/txx9/tx4938.h>
 #endif
@@ -821,3 +822,57 @@ void __init txx9_iocled_init(unsigned long baseaddr,
 {
 }
 #endif /* CONFIG_LEDS_GPIO */
+
+void __init txx9_dmac_init(int id, unsigned long baseaddr, int irq,
+                           const struct txx9dmac_platform_data *pdata)
+{
+#if defined(CONFIG_TXX9_DMAC) || defined(CONFIG_TXX9_DMAC_MODULE)
+        struct resource res[] = {
+                {
+                        .start = baseaddr,
+                        .end = baseaddr + 0x800 - 1,
+                        .flags = IORESOURCE_MEM,
+#ifndef CONFIG_MACH_TX49XX
+                }, {
+                        .start = irq,
+                        .flags = IORESOURCE_IRQ,
+#endif
+                }
+        };
+#ifdef CONFIG_MACH_TX49XX
+        struct resource chan_res[] = {
+                {
+                        .flags = IORESOURCE_IRQ,
+                }
+        };
+#endif
+        struct platform_device *pdev = platform_device_alloc("txx9dmac", id);
+        struct txx9dmac_chan_platform_data cpdata;
+        int i;
+
+        if (!pdev ||
+            platform_device_add_resources(pdev, res, ARRAY_SIZE(res)) ||
+            platform_device_add_data(pdev, pdata, sizeof(*pdata)) ||
+            platform_device_add(pdev)) {
+                platform_device_put(pdev);
+                return;
+        }
+        memset(&cpdata, 0, sizeof(cpdata));
+        cpdata.dmac_dev = pdev;
+        for (i = 0; i < TXX9_DMA_MAX_NR_CHANNELS; i++) {
+#ifdef CONFIG_MACH_TX49XX
+                chan_res[0].start = irq + i;
+#endif
+                pdev = platform_device_alloc("txx9dmac-chan",
+                                             id * TXX9_DMA_MAX_NR_CHANNELS + i);
+                if (!pdev ||
+#ifdef CONFIG_MACH_TX49XX
+                    platform_device_add_resources(pdev, chan_res,
+                                                  ARRAY_SIZE(chan_res)) ||
+#endif
+                    platform_device_add_data(pdev, &cpdata, sizeof(cpdata)) ||
+                    platform_device_add(pdev))
+                        platform_device_put(pdev);
+        }
+#endif
+}
diff --git a/arch/mips/txx9/generic/setup_tx4927.c b/arch/mips/txx9/generic/setup_tx4927.c
index 1093549df1a8..6b681cd7f8fb 100644
--- a/arch/mips/txx9/generic/setup_tx4927.c
+++ b/arch/mips/txx9/generic/setup_tx4927.c
@@ -22,6 +22,7 @@
 #include <asm/txx9tmr.h>
 #include <asm/txx9pio.h>
 #include <asm/txx9/generic.h>
+#include <asm/txx9/dmac.h>
 #include <asm/txx9/tx4927.h>
 
 static void __init tx4927_wdr_init(void)
@@ -253,6 +254,17 @@ void __init tx4927_mtd_init(int ch)
         txx9_physmap_flash_init(ch, start, size, &pdata);
 }
 
+void __init tx4927_dmac_init(int memcpy_chan)
+{
+        struct txx9dmac_platform_data plat_data = {
+                .memcpy_chan = memcpy_chan,
+                .have_64bit_regs = true,
+        };
+
+        txx9_dmac_init(0, TX4927_DMA_REG & 0xfffffffffULL,
+                       TXX9_IRQ_BASE + TX4927_IR_DMA(0), &plat_data);
+}
+
 static void __init tx4927_stop_unused_modules(void)
 {
         __u64 pcfg, rst = 0, ckd = 0;
diff --git a/arch/mips/txx9/generic/setup_tx4938.c b/arch/mips/txx9/generic/setup_tx4938.c
index 3925219b8973..b2b85293cd44 100644
--- a/arch/mips/txx9/generic/setup_tx4938.c
+++ b/arch/mips/txx9/generic/setup_tx4938.c
@@ -24,6 +24,7 @@
 #include <asm/txx9pio.h>
 #include <asm/txx9/generic.h>
 #include <asm/txx9/ndfmc.h>
+#include <asm/txx9/dmac.h>
 #include <asm/txx9/tx4938.h>
 
 static void __init tx4938_wdr_init(void)
@@ -239,11 +240,6 @@ void __init tx4938_setup(void)
         for (i = 0; i < TX4938_NR_TMR; i++)
                 txx9_tmr_init(TX4938_TMR_REG(i) & 0xfffffffffULL);
 
-        /* DMA */
-        for (i = 0; i < 2; i++)
-                ____raw_writeq(TX4938_DMA_MCR_MSTEN,
-                               (void __iomem *)(TX4938_DMA_REG(i) + 0x50));
-
         /* PIO */
         txx9_gpio_init(TX4938_PIO_REG & 0xfffffffffULL, 0, TX4938_NUM_PIO);
         __raw_writel(0, &tx4938_pioptr->maskcpu);
@@ -403,6 +399,21 @@ void __init tx4938_ndfmc_init(unsigned int hold, unsigned int spw)
                 txx9_ndfmc_init(baseaddr, &plat_data);
 }
 
+void __init tx4938_dmac_init(int memcpy_chan0, int memcpy_chan1)
+{
+        struct txx9dmac_platform_data plat_data = {
+                .have_64bit_regs = true,
+        };
+        int i;
+
+        for (i = 0; i < 2; i++) {
+                plat_data.memcpy_chan = i ? memcpy_chan1 : memcpy_chan0;
+                txx9_dmac_init(i, TX4938_DMA_REG(i) & 0xfffffffffULL,
+                               TXX9_IRQ_BASE + TX4938_IR_DMA(i, 0),
+                               &plat_data);
+        }
+}
+
 static void __init tx4938_stop_unused_modules(void)
 {
         __u64 pcfg, rst = 0, ckd = 0;
diff --git a/arch/mips/txx9/generic/setup_tx4939.c b/arch/mips/txx9/generic/setup_tx4939.c
index c2bf150c8838..98effef64fdb 100644
--- a/arch/mips/txx9/generic/setup_tx4939.c
+++ b/arch/mips/txx9/generic/setup_tx4939.c
@@ -28,6 +28,7 @@
 #include <asm/txx9tmr.h>
 #include <asm/txx9/generic.h>
 #include <asm/txx9/ndfmc.h>
+#include <asm/txx9/dmac.h>
 #include <asm/txx9/tx4939.h>
 
 static void __init tx4939_wdr_init(void)
@@ -259,11 +260,6 @@ void __init tx4939_setup(void)
         for (i = 0; i < TX4939_NR_TMR; i++)
                 txx9_tmr_init(TX4939_TMR_REG(i) & 0xfffffffffULL);
 
-        /* DMA */
-        for (i = 0; i < 2; i++)
-                ____raw_writeq(TX4938_DMA_MCR_MSTEN,
-                               (void __iomem *)(TX4939_DMA_REG(i) + 0x50));
-
         /* set PCIC1 reset (required to prevent hangup on BIST) */
         txx9_set64(&tx4939_ccfgptr->clkctr, TX4939_CLKCTR_PCI1RST);
         pcfg = ____raw_readq(&tx4939_ccfgptr->pcfg);
@@ -474,6 +470,21 @@ void __init tx4939_ndfmc_init(unsigned int hold, unsigned int spw,
         txx9_ndfmc_init(TX4939_NDFMC_REG & 0xfffffffffULL, &plat_data);
 }
 
+void __init tx4939_dmac_init(int memcpy_chan0, int memcpy_chan1)
+{
+        struct txx9dmac_platform_data plat_data = {
+                .have_64bit_regs = true,
+        };
+        int i;
+
+        for (i = 0; i < 2; i++) {
+                plat_data.memcpy_chan = i ? memcpy_chan1 : memcpy_chan0;
+                txx9_dmac_init(i, TX4939_DMA_REG(i) & 0xfffffffffULL,
+                               TXX9_IRQ_BASE + TX4939_IR_DMA(i, 0),
+                               &plat_data);
+        }
+}
+
 static void __init tx4939_stop_unused_modules(void)
 {
         __u64 pcfg, rst = 0, ckd = 0;
diff --git a/arch/mips/txx9/rbtx4927/setup.c b/arch/mips/txx9/rbtx4927/setup.c
index 01129a9d50fa..332cdbc7fcef 100644
--- a/arch/mips/txx9/rbtx4927/setup.c
+++ b/arch/mips/txx9/rbtx4927/setup.c
@@ -337,6 +337,10 @@ static void __init rbtx4927_device_init(void)
         rbtx4927_ne_init();
         tx4927_wdt_init();
         rbtx4927_mtd_init();
+        if (TX4927_REV_PCODE() == 0x4927)
+                tx4927_dmac_init(2);
+        else
+                tx4938_dmac_init(0, 2);
         txx9_iocled_init(RBTX4927_LED_ADDR - IO_BASE, -1, 3, 1, "green", NULL);
         rbtx4927_gpioled_init();
 }
diff --git a/arch/mips/txx9/rbtx4938/setup.c b/arch/mips/txx9/rbtx4938/setup.c
index 65d13df8878a..37c5e3d20287 100644
--- a/arch/mips/txx9/rbtx4938/setup.c
+++ b/arch/mips/txx9/rbtx4938/setup.c
@@ -355,6 +355,7 @@ static void __init rbtx4938_device_init(void)
         /* TC58DVM82A1FT: tDH=10ns, tWP=tRP=tREADID=35ns */
         tx4938_ndfmc_init(10, 35);
         tx4938_ata_init(RBTX4938_IRQ_IOC_ATA, 0, 1);
+        tx4938_dmac_init(0, 2);
         txx9_iocled_init(RBTX4938_LED_ADDR - IO_BASE, -1, 8, 1, "green", NULL);
 }
 
diff --git a/arch/mips/txx9/rbtx4939/setup.c b/arch/mips/txx9/rbtx4939/setup.c
index 4199c6fd4d1d..91f2ec8fa273 100644
--- a/arch/mips/txx9/rbtx4939/setup.c
+++ b/arch/mips/txx9/rbtx4939/setup.c
@@ -498,6 +498,7 @@ static void __init rbtx4939_device_init(void)
         tx4939_wdt_init();
         tx4939_ata_init();
         tx4939_rtc_init();
+        tx4939_dmac_init(0, 2);
 }
 
 static void __init rbtx4939_setup(void)