diff options
Diffstat (limited to 'arch/mips/cavium-octeon/octeon-platform.c')
| -rw-r--r-- | arch/mips/cavium-octeon/octeon-platform.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/octeon-platform.c b/arch/mips/cavium-octeon/octeon-platform.c new file mode 100644 index 000000000000..be711dd2d918 --- /dev/null +++ b/arch/mips/cavium-octeon/octeon-platform.c @@ -0,0 +1,164 @@ +/* + * 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) 2004-2009 Cavium Networks + * Copyright (C) 2008 Wind River Systems + */ + +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <asm/octeon/octeon.h> +#include <asm/octeon/cvmx-rnm-defs.h> + +static struct octeon_cf_data octeon_cf_data; + +static int __init octeon_cf_device_init(void) +{ + union cvmx_mio_boot_reg_cfgx mio_boot_reg_cfg; + unsigned long base_ptr, region_base, region_size; + struct platform_device *pd; + struct resource cf_resources[3]; + unsigned int num_resources; + int i; + int ret = 0; + + /* Setup octeon-cf platform device if present. */ + base_ptr = 0; + if (octeon_bootinfo->major_version == 1 + && octeon_bootinfo->minor_version >= 1) { + if (octeon_bootinfo->compact_flash_common_base_addr) + base_ptr = + octeon_bootinfo->compact_flash_common_base_addr; + } else { + base_ptr = 0x1d000800; + } + + if (!base_ptr) + return ret; + + /* Find CS0 region. */ + for (i = 0; i < 8; i++) { + mio_boot_reg_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(i)); + region_base = mio_boot_reg_cfg.s.base << 16; + region_size = (mio_boot_reg_cfg.s.size + 1) << 16; + if (mio_boot_reg_cfg.s.en && base_ptr >= region_base + && base_ptr < region_base + region_size) + break; + } + if (i >= 7) { + /* i and i + 1 are CS0 and CS1, both must be less than 8. */ + goto out; + } + octeon_cf_data.base_region = i; + octeon_cf_data.is16bit = mio_boot_reg_cfg.s.width; + octeon_cf_data.base_region_bias = base_ptr - region_base; + memset(cf_resources, 0, sizeof(cf_resources)); + num_resources = 0; + cf_resources[num_resources].flags = IORESOURCE_MEM; + cf_resources[num_resources].start = region_base; + cf_resources[num_resources].end = region_base + region_size - 1; + num_resources++; + + + if (!(base_ptr & 0xfffful)) { + /* + * Boot loader signals availability of DMA (true_ide + * mode) by setting low order bits of base_ptr to + * zero. + */ + + /* Asume that CS1 immediately follows. */ + mio_boot_reg_cfg.u64 = + cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(i + 1)); + region_base = mio_boot_reg_cfg.s.base << 16; + region_size = (mio_boot_reg_cfg.s.size + 1) << 16; + if (!mio_boot_reg_cfg.s.en) + goto out; + + cf_resources[num_resources].flags = IORESOURCE_MEM; + cf_resources[num_resources].start = region_base; + cf_resources[num_resources].end = region_base + region_size - 1; + num_resources++; + + octeon_cf_data.dma_engine = 0; + cf_resources[num_resources].flags = IORESOURCE_IRQ; + cf_resources[num_resources].start = OCTEON_IRQ_BOOTDMA; + cf_resources[num_resources].end = OCTEON_IRQ_BOOTDMA; + num_resources++; + } else { + octeon_cf_data.dma_engine = -1; + } + + pd = platform_device_alloc("pata_octeon_cf", -1); + if (!pd) { + ret = -ENOMEM; + goto out; + } + pd->dev.platform_data = &octeon_cf_data; + + ret = platform_device_add_resources(pd, cf_resources, num_resources); + if (ret) + goto fail; + + ret = platform_device_add(pd); + if (ret) + goto fail; + + return ret; +fail: + platform_device_put(pd); +out: + return ret; +} +device_initcall(octeon_cf_device_init); + +/* Octeon Random Number Generator. */ +static int __init octeon_rng_device_init(void) +{ + struct platform_device *pd; + int ret = 0; + + struct resource rng_resources[] = { + { + .flags = IORESOURCE_MEM, + .start = XKPHYS_TO_PHYS(CVMX_RNM_CTL_STATUS), + .end = XKPHYS_TO_PHYS(CVMX_RNM_CTL_STATUS) + 0xf + }, { + .flags = IORESOURCE_MEM, + .start = cvmx_build_io_address(8, 0), + .end = cvmx_build_io_address(8, 0) + 0x7 + } + }; + + pd = platform_device_alloc("octeon_rng", -1); + if (!pd) { + ret = -ENOMEM; + goto out; + } + + ret = platform_device_add_resources(pd, rng_resources, + ARRAY_SIZE(rng_resources)); + if (ret) + goto fail; + + ret = platform_device_add(pd); + if (ret) + goto fail; + + return ret; +fail: + platform_device_put(pd); + +out: + return ret; +} +device_initcall(octeon_rng_device_init); + +MODULE_AUTHOR("David Daney <ddaney@caviumnetworks.com>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Platform driver for Octeon SOC"); |