malta: IDE support

This patch adds IDE support to the MIPS Malta board. The IDE controller
is enabled after probing the PCI bus and otherwise just makes use of
U-boot generic IDE support.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/include/asm/malta.h

@@ -64,4 +64,9 @@
 
 #define PCI_CFG_PIIX4_GENCFG_SERIRQ	(1 << 16)
 
+#define PCI_CFG_PIIX4_IDETIM_PRI	0x40
+#define PCI_CFG_PIIX4_IDETIM_SEC	0x42
+
+#define PCI_CFG_PIIX4_IDETIM_IDE	(1 << 15)
+
 #endif /* _MIPS_ASM_MALTA_H */

board/imgtec/malta/malta.c

@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <ide.h>
 #include <netdev.h>
 #include <pci.h>
 #include <pci_gt64120.h>
@@ -217,4 +218,22 @@ void pci_init_board(void)
 	pci_read_config_byte(bdf, PCI_CFG_PIIX4_SERIRQC, &val8);
 	val8 |= PCI_CFG_PIIX4_SERIRQC_EN | PCI_CFG_PIIX4_SERIRQC_CONT;
 	pci_write_config_byte(bdf, PCI_CFG_PIIX4_SERIRQC, val8);
+
+	bdf = pci_find_device(PCI_VENDOR_ID_INTEL,
+			      PCI_DEVICE_ID_INTEL_82371AB, 0);
+	if (bdf == -1)
+		panic("Failed to find PIIX4 IDE controller\n");
+
+	/* enable bus master & IO access */
+	val32 |= PCI_COMMAND_MASTER | PCI_COMMAND_IO;
+	pci_write_config_dword(bdf, PCI_COMMAND, val32);
+
+	/* set latency */
+	pci_write_config_byte(bdf, PCI_LATENCY_TIMER, 0x40);
+
+	/* enable IDE/ATA */
+	pci_write_config_dword(bdf, PCI_CFG_PIIX4_IDETIM_PRI,
+			       PCI_CFG_PIIX4_IDETIM_IDE);
+	pci_write_config_dword(bdf, PCI_CFG_PIIX4_IDETIM_SEC,
+			       PCI_CFG_PIIX4_IDETIM_IDE);
 }

include/configs/malta.h

@@ -107,6 +107,16 @@
 	(CONFIG_SYS_FLASH_BASE + (4 << 20) - CONFIG_ENV_SIZE)
 
 /*
+ * IDE/ATA
+ */
+#define CONFIG_SYS_IDE_MAXBUS		1
+#define CONFIG_SYS_IDE_MAXDEVICE	2
+#define CONFIG_SYS_ATA_BASE_ADDR	CONFIG_SYS_ISA_IO_BASE_ADDRESS
+#define CONFIG_SYS_ATA_IDE0_OFFSET	0x01f0
+#define CONFIG_SYS_ATA_DATA_OFFSET	0
+#define CONFIG_SYS_ATA_REG_OFFSET	0
+
+/*
  * Commands
  */
 #include <config_cmd_default.h>
@@ -118,6 +128,7 @@
 
 #define CONFIG_CMD_DATE
 #define CONFIG_CMD_DHCP
+#define CONFIG_CMD_IDE
 #define CONFIG_CMD_PCI
 #define CONFIG_CMD_PING