TXx9: Add TX4938 ATA support (v3)
Add a helper routine to register tx4938ide driver and use it on
RBTX4938 board.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/arch/mips/include/asm/txx9/tx4938.h b/arch/mips/include/asm/txx9/tx4938.h
index 989e775..0b06815 100644
--- a/arch/mips/include/asm/txx9/tx4938.h
+++ b/arch/mips/include/asm/txx9/tx4938.h
@@ -292,4 +292,17 @@
void tx4938_irq_init(void);
void tx4938_mtd_init(int ch);
+struct tx4938ide_platform_info {
+ /*
+ * I/O port shift, for platforms with ports that are
+ * constantly spaced and need larger than the 1-byte
+ * spacing used by ata_std_ports().
+ */
+ unsigned int ioport_shift;
+ unsigned int gbus_clock; /* 0 means no PIO mode tuning. */
+ unsigned int ebus_ch;
+};
+
+void tx4938_ata_init(unsigned int irq, unsigned int shift, int tune);
+
#endif
diff --git a/arch/mips/txx9/generic/setup_tx4938.c b/arch/mips/txx9/generic/setup_tx4938.c
index af724e5..25819ff 100644
--- a/arch/mips/txx9/generic/setup_tx4938.c
+++ b/arch/mips/txx9/generic/setup_tx4938.c
@@ -16,6 +16,7 @@
#include <linux/param.h>
#include <linux/ptrace.h>
#include <linux/mtd/physmap.h>
+#include <linux/platform_device.h>
#include <asm/reboot.h>
#include <asm/traps.h>
#include <asm/txx9irq.h>
@@ -335,6 +336,52 @@
txx9_physmap_flash_init(ch, start, size, &pdata);
}
+void __init tx4938_ata_init(unsigned int irq, unsigned int shift, int tune)
+{
+ struct platform_device *pdev;
+ struct resource res[] = {
+ {
+ /* .start and .end are filled in later */
+ .flags = IORESOURCE_MEM,
+ }, {
+ .start = irq,
+ .flags = IORESOURCE_IRQ,
+ },
+ };
+ struct tx4938ide_platform_info pdata = {
+ .ioport_shift = shift,
+ /*
+ * The IDE driver should not change bus timings if other ISA
+ * devices existed.
+ */
+ .gbus_clock = tune ? txx9_gbus_clock : 0,
+ };
+ u64 ebccr;
+ int i;
+
+ if ((__raw_readq(&tx4938_ccfgptr->pcfg) &
+ (TX4938_PCFG_ATA_SEL | TX4938_PCFG_NDF_SEL))
+ != TX4938_PCFG_ATA_SEL)
+ return;
+ for (i = 0; i < 8; i++) {
+ /* check EBCCRn.ISA, EBCCRn.BSZ, EBCCRn.ME */
+ ebccr = __raw_readq(&tx4938_ebuscptr->cr[i]);
+ if ((ebccr & 0x00f00008) == 0x00e00008)
+ break;
+ }
+ if (i == 8)
+ return;
+ pdata.ebus_ch = i;
+ res[0].start = ((ebccr >> 48) << 20) + 0x10000;
+ res[0].end = res[0].start + 0x20000 - 1;
+ pdev = platform_device_alloc("tx4938ide", -1);
+ 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);
+}
+
static void __init tx4938_stop_unused_modules(void)
{
__u64 pcfg, rst = 0, ckd = 0;
diff --git a/arch/mips/txx9/rbtx4938/setup.c b/arch/mips/txx9/rbtx4938/setup.c
index e077cc4..547ff29 100644
--- a/arch/mips/txx9/rbtx4938/setup.c
+++ b/arch/mips/txx9/rbtx4938/setup.c
@@ -352,6 +352,7 @@
rbtx4938_ne_init();
tx4938_wdt_init();
rbtx4938_mtd_init();
+ tx4938_ata_init(RBTX4938_IRQ_IOC_ATA, 0, 1);
txx9_iocled_init(RBTX4938_LED_ADDR - IO_BASE, -1, 8, 1, "green", NULL);
}