86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/ata_platform.h>
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#include <asm/sibyte/board.h>
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#include <asm/sibyte/sb1250_genbus.h>
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#include <asm/sibyte/sb1250_regs.h>
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#if defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR)
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#define DRV_NAME "pata-swarm"
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#define SWARM_IDE_SHIFT 5
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#define SWARM_IDE_BASE 0x1f0
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#define SWARM_IDE_CTRL 0x3f6
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static struct resource swarm_pata_resource[] = {
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{
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.name = "Swarm GenBus IDE",
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.flags = IORESOURCE_MEM,
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}, {
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.name = "Swarm GenBus IDE",
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.flags = IORESOURCE_MEM,
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}, {
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.name = "Swarm GenBus IDE",
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.flags = IORESOURCE_IRQ,
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.start = K_INT_GB_IDE,
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.end = K_INT_GB_IDE,
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},
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};
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static struct pata_platform_info pata_platform_data = {
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.ioport_shift = SWARM_IDE_SHIFT,
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};
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static struct platform_device swarm_pata_device = {
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.name = "pata_platform",
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.id = -1,
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.resource = swarm_pata_resource,
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.num_resources = ARRAY_SIZE(swarm_pata_resource),
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.dev = {
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.platform_data = &pata_platform_data,
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.coherent_dma_mask = ~0, /* grumble */
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},
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};
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static int __init swarm_pata_init(void)
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{
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u8 __iomem *base;
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phys_t offset, size;
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struct resource *r;
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if (!SIBYTE_HAVE_IDE)
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return -ENODEV;
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base = ioremap(A_IO_EXT_BASE, 0x800);
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offset = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_START_ADDR, IDE_CS));
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size = __raw_readq(base + R_IO_EXT_REG(R_IO_EXT_MULT_SIZE, IDE_CS));
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iounmap(base);
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offset = G_IO_START_ADDR(offset) << S_IO_ADDRBASE;
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size = (G_IO_MULT_SIZE(size) + 1) << S_IO_REGSIZE;
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if (offset < A_PHYS_GENBUS || offset >= A_PHYS_GENBUS_END) {
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pr_info(DRV_NAME ": PATA interface at GenBus disabled\n");
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return -EBUSY;
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}
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pr_info(DRV_NAME ": PATA interface at GenBus slot %i\n", IDE_CS);
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r = swarm_pata_resource;
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r[0].start = offset + (SWARM_IDE_BASE << SWARM_IDE_SHIFT);
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r[0].end = offset + ((SWARM_IDE_BASE + 8) << SWARM_IDE_SHIFT) - 1;
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r[1].start = offset + (SWARM_IDE_CTRL << SWARM_IDE_SHIFT);
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r[1].end = offset + ((SWARM_IDE_CTRL + 1) << SWARM_IDE_SHIFT) - 1;
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return platform_device_register(&swarm_pata_device);
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}
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device_initcall(swarm_pata_init);
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#endif /* defined(CONFIG_SIBYTE_SWARM) || defined(CONFIG_SIBYTE_LITTLESUR) */
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