From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/mips/sibyte/swarm/platform.c | 140 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 arch/mips/sibyte/swarm/platform.c

(limited to 'arch/mips/sibyte/swarm/platform.c')

diff --git a/arch/mips/sibyte/swarm/platform.c b/arch/mips/sibyte/swarm/platform.c
new file mode 100644
index 000000000..484969db7
--- /dev/null
+++ b/arch/mips/sibyte/swarm/platform.c
@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/ata_platform.h>
+
+#include <asm/sibyte/board.h>
+#include <asm/sibyte/sb1250_genbus.h>
+#include <asm/sibyte/sb1250_regs.h>
+
+#if defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR)
+
+#define DRV_NAME	"pata-swarm"
+
+#define SWARM_IDE_SHIFT 5
+#define SWARM_IDE_BASE	0x1f0
+#define SWARM_IDE_CTRL	0x3f6
+
+static struct resource swarm_pata_resource[] = {
+	{
+		.name	= "Swarm GenBus IDE",
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.name	= "Swarm GenBus IDE",
+		.flags	= IORESOURCE_MEM,
+	}, {
+		.name	= "Swarm GenBus IDE",
+		.flags	= IORESOURCE_IRQ,
+		.start	= K_INT_GB_IDE,
+		.end	= K_INT_GB_IDE,
+	},
+};
+
+static struct pata_platform_info pata_platform_data = {
+	.ioport_shift	= SWARM_IDE_SHIFT,
+};
+
+static struct platform_device swarm_pata_device = {
+	.name		= "pata_platform",
+	.id		= -1,
+	.resource	= swarm_pata_resource,
+	.num_resources	= ARRAY_SIZE(swarm_pata_resource),
+	.dev  = {
+		.platform_data		= &pata_platform_data,
+		.coherent_dma_mask	= ~0,	/* grumble */
+	},
+};
+
+static int __init swarm_pata_init(void)
+{
+	u8 __iomem *base;
+	phys_addr_t offset, size;
+	struct resource *r;
+
+	if (!SIBYTE_HAVE_IDE)
+		return -ENODEV;
+
+	base = ioremap(A_IO_EXT_BASE, 0x800);
+	offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
+	size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
+	iounmap(base);
+
+	offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
+	size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
+	if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
+		pr_info(DRV_NAME ": PATA interface at GenBus disabled\n");
+
+		return -EBUSY;
+	}
+
+	pr_info(DRV_NAME ": PATA interface at GenBus slot %i\n", IDE_CS);
+
+	r = swarm_pata_resource;
+	r[0].start = offset + (SWARM_IDE_BASE << SWARM_IDE_SHIFT);
+	r[0].end   = offset + ((SWARM_IDE_BASE + 8) << SWARM_IDE_SHIFT) - 1;
+	r[1].start = offset + (SWARM_IDE_CTRL << SWARM_IDE_SHIFT);
+	r[1].end   = offset + ((SWARM_IDE_CTRL + 1) << SWARM_IDE_SHIFT) - 1;
+
+	return platform_device_register(&swarm_pata_device);
+}
+
+device_initcall(swarm_pata_init);
+
+#endif /* defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR) */
+
+#define sb1250_dev_struct(num) \
+	static struct resource sb1250_res##num = {		\
+		.name = "SB1250 MAC " __stringify(num),		\
+		.flags = IORESOURCE_MEM,		\
+		.start = A_MAC_CHANNEL_BASE(num),	\
+		.end = A_MAC_CHANNEL_BASE(num + 1) -1,	\
+	};\
+	static struct platform_device sb1250_dev##num = {	\
+		.name = "sb1250-mac",			\
+	.id = num,					\
+	.resource = &sb1250_res##num,			\
+	.num_resources = 1,				\
+	}
+
+sb1250_dev_struct(0);
+sb1250_dev_struct(1);
+sb1250_dev_struct(2);
+sb1250_dev_struct(3);
+
+static struct platform_device *sb1250_devs[] __initdata = {
+	&sb1250_dev0,
+	&sb1250_dev1,
+	&sb1250_dev2,
+	&sb1250_dev3,
+};
+
+static int __init sb1250_device_init(void)
+{
+	int ret;
+
+	/* Set the number of available units based on the SOC type.  */
+	switch (soc_type) {
+	case K_SYS_SOC_TYPE_BCM1250:
+	case K_SYS_SOC_TYPE_BCM1250_ALT:
+		ret = platform_add_devices(sb1250_devs, 3);
+		break;
+	case K_SYS_SOC_TYPE_BCM1120:
+	case K_SYS_SOC_TYPE_BCM1125:
+	case K_SYS_SOC_TYPE_BCM1125H:
+	case K_SYS_SOC_TYPE_BCM1250_ALT2:	/* Hybrid */
+		ret = platform_add_devices(sb1250_devs, 2);
+		break;
+	case K_SYS_SOC_TYPE_BCM1x55:
+	case K_SYS_SOC_TYPE_BCM1x80:
+		ret = platform_add_devices(sb1250_devs, 4);
+		break;
+	default:
+		ret = -ENODEV;
+		break;
+	}
+	return ret;
+}
+device_initcall(sb1250_device_init);
-- 
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