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linux/arch/mips/cavium-octeon/octeon-platform.c
David Daney d957705446 MIPS: Octeon: Register some devices on the I2C bus. 
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: linux-i2c@vger.kernel.org
To: ben-linux@fluff.org
To: khali@linux-fr.org
Cc: Rade Bozic <rade.bozic.ext@nsn.com>
Patchwork: http://patchwork.linux-mips.org/patch/845/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2010-02-27 12:53:05 +01:00

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/*
* 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/i2c.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);
static struct i2c_board_info __initdata octeon_i2c_devices[] = {
{
I2C_BOARD_INFO("ds1337", 0x68),
},
};
static int __init octeon_i2c_devices_init(void)
{
return i2c_register_board_info(0, octeon_i2c_devices,
ARRAY_SIZE(octeon_i2c_devices));
}
arch_initcall(octeon_i2c_devices_init);
#define OCTEON_I2C_IO_BASE 0x1180000001000ull
#define OCTEON_I2C_IO_UNIT_OFFSET 0x200
static struct octeon_i2c_data octeon_i2c_data[2];
static int __init octeon_i2c_device_init(void)
{
struct platform_device *pd;
int ret = 0;
int port, num_ports;
struct resource i2c_resources[] = {
{
.flags = IORESOURCE_MEM,
}, {
.flags = IORESOURCE_IRQ,
}
};
if (OCTEON_IS_MODEL(OCTEON_CN56XX) || OCTEON_IS_MODEL(OCTEON_CN52XX))
num_ports = 2;
else
num_ports = 1;
for (port = 0; port < num_ports; port++) {
octeon_i2c_data[port].sys_freq = octeon_get_clock_rate();
/*FIXME: should be examined. At the moment is set for 100Khz */
octeon_i2c_data[port].i2c_freq = 100000;
pd = platform_device_alloc("i2c-octeon", port);
if (!pd) {
ret = -ENOMEM;
goto out;
}
pd->dev.platform_data = octeon_i2c_data + port;
i2c_resources[0].start =
OCTEON_I2C_IO_BASE + (port * OCTEON_I2C_IO_UNIT_OFFSET);
i2c_resources[0].end = i2c_resources[0].start + 0x1f;
switch (port) {
case 0:
i2c_resources[1].start = OCTEON_IRQ_TWSI;
i2c_resources[1].end = OCTEON_IRQ_TWSI;
break;
case 1:
i2c_resources[1].start = OCTEON_IRQ_TWSI2;
i2c_resources[1].end = OCTEON_IRQ_TWSI2;
break;
default:
BUG();
}
ret = platform_device_add_resources(pd,
i2c_resources,
ARRAY_SIZE(i2c_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_i2c_device_init);
/* Octeon SMI/MDIO interface. */
static int __init octeon_mdiobus_device_init(void)
{
struct platform_device *pd;
int ret = 0;
if (octeon_is_simulation())
return 0; /* No mdio in the simulator. */
/* The bus number is the platform_device id. */
pd = platform_device_alloc("mdio-octeon", 0);
if (!pd) {
ret = -ENOMEM;
goto out;
}
ret = platform_device_add(pd);
if (ret)
goto fail;
return ret;
fail:
platform_device_put(pd);
out:
return ret;
}
device_initcall(octeon_mdiobus_device_init);
/* Octeon mgmt port Ethernet interface. */
static int __init octeon_mgmt_device_init(void)
{
struct platform_device *pd;
int ret = 0;
int port, num_ports;
struct resource mgmt_port_resource = {
.flags = IORESOURCE_IRQ,
.start = -1,
.end = -1
};
if (!OCTEON_IS_MODEL(OCTEON_CN56XX) && !OCTEON_IS_MODEL(OCTEON_CN52XX))
return 0;
if (OCTEON_IS_MODEL(OCTEON_CN56XX))
num_ports = 1;
else
num_ports = 2;
for (port = 0; port < num_ports; port++) {
pd = platform_device_alloc("octeon_mgmt", port);
if (!pd) {
ret = -ENOMEM;
goto out;
}
switch (port) {
case 0:
mgmt_port_resource.start = OCTEON_IRQ_MII0;
break;
case 1:
mgmt_port_resource.start = OCTEON_IRQ_MII1;
break;
default:
BUG();
}
mgmt_port_resource.end = mgmt_port_resource.start;
ret = platform_device_add_resources(pd, &mgmt_port_resource, 1);
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_mgmt_device_init);
MODULE_AUTHOR("David Daney <ddaney@caviumnetworks.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Platform driver for Octeon SOC");
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