[MIPS] Support for several more SNI RM models.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 227 insertions, 0 deletions

diff --git a/arch/mips/sni/a20r.c b/arch/mips/sni/a20r.c
new file mode 100644
index 000000000000..31ab80f1befa
--- /dev/null
+++ b/arch/mips/sni/a20r.c
@@ -0,0 +1,227 @@
+/*
+ * A20R specific code
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/serial_8250.h>
+
+#include <asm/sni.h>
+#include <asm/time.h>
+#include <asm/ds1216.h>
+
+#define PORT(_base,_irq)				\
+	{						\
+		.iobase		= _base,		\
+		.irq		= _irq,			\
+		.uartclk	= 1843200,		\
+		.iotype		= UPIO_PORT,		\
+		.flags		= UPF_BOOT_AUTOCONF,	\
+	}
+
+static struct plat_serial8250_port a20r_data[] = {
+	PORT(0x3f8, 4),
+	PORT(0x2f8, 3),
+	{ },
+};
+
+static struct platform_device a20r_serial8250_device = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev			= {
+		.platform_data	= a20r_data,
+	},
+};
+
+static struct resource snirm_82596_rsrc[] = {
+	{
+		.start = 0xb8000000,
+		.end   = 0xb8000004,
+		.flags = IORESOURCE_MEM
+	},
+	{
+		.start = 0xb8010000,
+		.end   = 0xb8010004,
+		.flags = IORESOURCE_MEM
+	},
+	{
+		.start = 0xbff00000,
+		.end   = 0xbff00020,
+		.flags = IORESOURCE_MEM
+	},
+	{
+		.start = 22,
+		.end   = 22,
+		.flags = IORESOURCE_IRQ
+	},
+	{
+		.flags = 0x01                /* 16bit mpu port access */
+	}
+};
+
+static struct platform_device snirm_82596_pdev = {
+	.name           = "snirm_82596",
+	.num_resources  = ARRAY_SIZE(snirm_82596_rsrc),
+	.resource       = snirm_82596_rsrc
+};
+
+static struct resource snirm_53c710_rsrc[] = {
+	{
+		.start = 0xb9000000,
+		.end   = 0xb90fffff,
+		.flags = IORESOURCE_MEM
+	},
+	{
+		.start = 19,
+		.end   = 19,
+		.flags = IORESOURCE_IRQ
+	}
+};
+
+static struct platform_device snirm_53c710_pdev = {
+	.name           = "snirm_53c710",
+	.num_resources  = ARRAY_SIZE(snirm_53c710_rsrc),
+	.resource       = snirm_53c710_rsrc
+};
+
+static struct resource sc26xx_rsrc[] = {
+	{
+		.start = 0xbc070000,
+		.end   = 0xbc0700ff,
+		.flags = IORESOURCE_MEM
+	},
+	{
+		.start = 20,
+		.end   = 20,
+		.flags = IORESOURCE_IRQ
+	}
+};
+
+static struct platform_device sc26xx_pdev = {
+	.name           = "SC26xx",
+	.num_resources  = ARRAY_SIZE(sc26xx_rsrc),
+	.resource       = sc26xx_rsrc
+};
+
+static u32 a20r_ack_hwint(void)
+{
+	u32 status = read_c0_status();
+
+	write_c0_status (status | 0x00010000);
+	asm volatile(
+	"	.set	push			\n"
+	"	.set	noat			\n"
+	"	.set	noreorder		\n"
+	"	lw	$1, 0(%0)		\n"
+	"	sb	$0, 0(%1)		\n"
+	"	sync				\n"
+	"	lb	%1, 0(%1)		\n"
+	"	b	1f			\n"
+	"	ori	%1, $1, 2		\n"
+	"	.align	8			\n"
+	"1:					\n"
+	"	nop				\n"
+	"	sw	%1, 0(%0)		\n"
+	"	sync				\n"
+	"	li	%1, 0x20		\n"
+	"2:					\n"
+	"	nop				\n"
+	"	bnez	%1,2b			\n"
+	"	addiu	%1, -1			\n"
+	"	sw	$1, 0(%0)		\n"
+	"	sync				\n"
+		".set   pop			\n"
+	:
+	: "Jr" (PCIMT_UCONF), "Jr" (0xbc000000));
+	write_c0_status(status);
+
+	return status;
+}
+
+static inline void unmask_a20r_irq(unsigned int irq)
+{
+	set_c0_status(0x100 << (irq - SNI_A20R_IRQ_BASE));
+	irq_enable_hazard();
+}
+
+static inline void mask_a20r_irq(unsigned int irq)
+{
+	clear_c0_status(0x100 << (irq - SNI_A20R_IRQ_BASE));
+	irq_disable_hazard();
+}
+
+static void end_a20r_irq(unsigned int irq)
+{
+	if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
+		a20r_ack_hwint();
+		unmask_a20r_irq(irq);
+	}
+}
+
+static struct irq_chip a20r_irq_type = {
+	.typename	= "A20R",
+	.ack		= mask_a20r_irq,
+	.mask		= mask_a20r_irq,
+	.mask_ack	= mask_a20r_irq,
+	.unmask		= unmask_a20r_irq,
+	.end		= end_a20r_irq,
+};
+
+/*
+ * hwint 0 receive all interrupts
+ */
+static void a20r_hwint(void)
+{
+	u32 cause, status;
+	int irq;
+
+	clear_c0_status (IE_IRQ0);
+	status = a20r_ack_hwint();
+	cause = read_c0_cause();
+
+	irq = ffs(((cause & status) >> 8) & 0xf8);
+	if (likely(irq > 0))
+		do_IRQ(SNI_A20R_IRQ_BASE + irq - 1);
+	set_c0_status(IE_IRQ0);
+}
+
+void __init sni_a20r_irq_init(void)
+{
+	int i;
+
+	for (i = SNI_A20R_IRQ_BASE + 2 ; i < SNI_A20R_IRQ_BASE + 8; i++)
+		set_irq_chip(i, &a20r_irq_type);
+	sni_hwint = a20r_hwint;
+	change_c0_status(ST0_IM, IE_IRQ0);
+	setup_irq (SNI_A20R_IRQ_BASE + 3, &sni_isa_irq);
+}
+
+void sni_a20r_init(void)
+{
+	ds1216_base = (volatile unsigned char *) SNI_DS1216_A20R_BASE;
+	rtc_mips_get_time = ds1216_get_cmos_time;
+}
+
+static int __init snirm_a20r_setup_devinit(void)
+{
+	switch (sni_brd_type) {
+	case SNI_BRD_TOWER_OASIC:
+	case SNI_BRD_MINITOWER:
+	        platform_device_register(&snirm_82596_pdev);
+	        platform_device_register(&snirm_53c710_pdev);
+	        platform_device_register(&sc26xx_pdev);
+	        platform_device_register(&a20r_serial8250_device);
+	        break;
+	}
+
+	return 0;
+}
+
+device_initcall(snirm_a20r_setup_devinit);