cmd_ide: enhance new feature "CONFIG_IDE_AHB"

Although most IDE controller is designed to be connected to PCI bridge,
there are still some IDE controller support AHB interface for SoC design.

The driver implementation of these IDE-AHB controllers differ from other
IDE-PCI controller, some additional registers and commands access is required
during CMD/DATA I/O. Hence a configuration "CONFIG_IDE_AHB" in cmd_ide.c is
required to be defined to support these kinds of SoC controllers. Such as
Faraday's FTIDE020 series and Global Unichip's UINF-0301.

Signed-off-by: Macpaul Lin <macpaul@andestech.com>

diff --git a/README b/README
index d7e5b76295d22b0b3a90ad3cdee1db0e82de9000..b74483e9fb050e44d9a78a398f409c13078d0f2d 100644 (file)
--- a/README
+++ b/README
@@ -2751,6 +2751,14 @@ Low Level (hardware related) configuration options:
                source code. It is used to make hardware dependant
                initializations.
 
+- CONFIG_IDE_AHB:
+               Most IDE controllers were designed to be connected with PCI
+               interface. Only few of them were designed for AHB interface.
+               When software is doing ATA command and data transfer to
+               IDE devices through IDE-AHB controller, some additional
+               registers accessing to these kind of IDE-AHB controller
+               is requierd.
+
 - CONFIG_SYS_IMMR:     Physical address of the Internal Memory.
                DO NOT CHANGE unless you know exactly what you're
                doing! (11-4) [MPC8xx/82xx systems only]

diff --git a/common/cmd_ide.c b/common/cmd_ide.c
index a1f7e57155b74a25936e73d92578214f661cff2e..e7952ff8d615f9974a16d6373ca29b0845daccaf 100644 (file)
--- a/common/cmd_ide.c
+++ b/common/cmd_ide.c
@@ -517,8 +517,20 @@ __ide_outb(int dev, int port, unsigned char val)
 {
        debug ("ide_outb (dev= %d, port= 0x%x, val= 0x%02x) : @ 0x%08lx\n",
                dev, port, val, (ATA_CURR_BASE(dev)+CONFIG_SYS_ATA_PORT_ADDR(port)));
+
+#if defined(CONFIG_IDE_AHB)
+       if (port) {
+               /* write command */
+               ide_write_register(dev, port, val);
+       } else {
+               /* write data */
+               outb(val, (ATA_CURR_BASE(dev)));
+       }
+#else
        outb(val, (ATA_CURR_BASE(dev)+CONFIG_SYS_ATA_PORT_ADDR(port)));
+#endif
 }
+
 void ide_outb (int dev, int port, unsigned char val)
                __attribute__((weak, alias("__ide_outb")));
 
@@ -526,7 +538,13 @@ unsigned char inline
 __ide_inb(int dev, int port)
 {
        uchar val;
+
+#if defined(CONFIG_IDE_AHB)
+       val = ide_read_register(dev, port);
+#else
        val = inb((ATA_CURR_BASE(dev)+CONFIG_SYS_ATA_PORT_ADDR(port)));
+#endif
+
        debug ("ide_inb (dev= %d, port= 0x%x) : @ 0x%08lx -> 0x%02x\n",
                dev, port, (ATA_CURR_BASE(dev)+CONFIG_SYS_ATA_PORT_ADDR(port)), val);
        return val;
@@ -695,6 +713,7 @@ void ide_init (void)
                ide_dev_desc[i].blksz=0;
                ide_dev_desc[i].lba=0;
                ide_dev_desc[i].block_read=ide_read;
+               ide_dev_desc[i].block_write = ide_write;
                if (!ide_bus_ok[IDE_BUS(i)])
                        continue;
                ide_led (led, 1);               /* LED on       */
@@ -902,7 +921,11 @@ output_data(int dev, ulong *sect_buf, int words)
 static void
 output_data(int dev, ulong *sect_buf, int words)
 {
-       outsw(ATA_CURR_BASE(dev)+ATA_DATA_REG, sect_buf, words<<1);
+#if defined(CONFIG_IDE_AHB)
+       ide_write_data(dev, sect_buf, words);
+#else
+       outsw(ATA_CURR_BASE(dev)+ATA_DATA_REG, sect_buf, words << 1);
+#endif
 }
 #endif /* CONFIG_IDE_SWAP_IO */
 
@@ -960,7 +983,11 @@ input_data(int dev, ulong *sect_buf, int words)
 static void
 input_data(int dev, ulong *sect_buf, int words)
 {
+#if defined(CONFIG_IDE_AHB)
+       ide_read_data(dev, sect_buf, words);
+#else
        insw(ATA_CURR_BASE(dev)+ATA_DATA_REG, sect_buf, words << 1);
+#endif
 }
 
 #endif /* CONFIG_IDE_SWAP_IO */

diff --git a/include/ide.h b/include/ide.h
index 6a1b7ae844f34529e6dfa4d18ae7887c9f068ea6..80a10f41023d8ad82ff046fe1352fc57fe298c10 100644 (file)
--- a/include/ide.h
+++ b/include/ide.h
@@ -57,4 +57,11 @@ ulong ide_write(int device, lbaint_t blknr, ulong blkcnt, void *buffer);
 #if defined(CONFIG_OF_IDE_FIXUP)
 int ide_device_present(int dev);
 #endif
+
+#if defined(CONFIG_IDE_AHB)
+unsigned char ide_read_register(int dev, unsigned int port);
+void ide_write_register(int dev, unsigned int port, unsigned char val);
+void ide_read_data(int dev, ulong *sect_buf, int words);
+void ide_write_data(int dev, ulong *sect_buf, int words);
+#endif
 #endif /* _IDE_H */