diff options
Diffstat (limited to 'arch/arm/mach-omap2/ssi.c')
-rw-r--r-- | arch/arm/mach-omap2/ssi.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/ssi.c b/arch/arm/mach-omap2/ssi.c new file mode 100644 index 00000000000..e822a77f5ca --- /dev/null +++ b/arch/arm/mach-omap2/ssi.c @@ -0,0 +1,134 @@ +/* + * linux/arch/arm/mach-omap2/ssi.c + * + * Copyright (C) 2010 Nokia Corporation. All rights reserved. + * + * Contact: Carlos Chinea <carlos.chinea@nokia.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA + * 02110-1301 USA + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/err.h> +#include <linux/gpio.h> +#include <linux/platform_device.h> +#include <plat/omap-pm.h> +#include <plat/ssi.h> + +static struct omap_ssi_platform_data ssi_pdata = { + .num_ports = SSI_NUM_PORTS, + .get_dev_context_loss_count = omap_pm_get_dev_context_loss_count, +}; + +static struct resource ssi_resources[] = { + /* SSI controller */ + [0] = { + .start = 0x48058000, + .end = 0x48058fff, + .name = "omap_ssi_sys", + .flags = IORESOURCE_MEM, + }, + /* GDD */ + [1] = { + .start = 0x48059000, + .end = 0x48059fff, + .name = "omap_ssi_gdd", + .flags = IORESOURCE_MEM, + }, + [2] = { + .start = 71, + .end = 71, + .name = "ssi_gdd", + .flags = IORESOURCE_IRQ, + }, + /* SSI port 1 */ + [3] = { + .start = 0x4805a000, + .end = 0x4805a7ff, + .name = "omap_ssi_sst1", + .flags = IORESOURCE_MEM, + }, + [4] = { + .start = 0x4805a800, + .end = 0x4805afff, + .name = "omap_ssi_ssr1", + .flags = IORESOURCE_MEM, + }, + [5] = { + .start = 67, + .end = 67, + .name = "ssi_p1_mpu_irq0", + .flags = IORESOURCE_IRQ, + }, + [6] = { + .start = 68, + .end = 68, + .name = "ssi_p1_mpu_irq1", + .flags = IORESOURCE_IRQ, + }, + [7] = { + .start = 0, + .end = 0, + .name = "ssi_p1_cawake", + .flags = IORESOURCE_IRQ | IORESOURCE_UNSET, + }, +}; + +static struct platform_device ssi_pdev = { + .name = "omap_ssi", + .id = 0, + .num_resources = ARRAY_SIZE(ssi_resources), + .resource = ssi_resources, + .dev = { + .platform_data = &ssi_pdata, + }, +}; + +int __init omap_ssi_config(struct omap_ssi_board_config *ssi_config) +{ + unsigned int port, offset, cawake_gpio; + int err; + + ssi_pdata.num_ports = ssi_config->num_ports; + for (port = 0, offset = 7; port < ssi_config->num_ports; + port++, offset += 5) { + cawake_gpio = ssi_config->cawake_gpio[port]; + if (!cawake_gpio) + continue; /* Nothing to do */ + err = gpio_request(cawake_gpio, "cawake"); + if (err < 0) + goto rback; + gpio_direction_input(cawake_gpio); + ssi_resources[offset].start = gpio_to_irq(cawake_gpio); + ssi_resources[offset].flags &= ~IORESOURCE_UNSET; + ssi_resources[offset].flags |= IORESOURCE_IRQ_HIGHEDGE | + IORESOURCE_IRQ_LOWEDGE; + } + + return 0; +rback: + dev_err(&ssi_pdev.dev, "Request cawake (gpio%d) failed\n", cawake_gpio); + while (port > 0) + gpio_free(ssi_config->cawake_gpio[--port]); + + return err; +} + +static int __init ssi_init(void) +{ + return platform_device_register(&ssi_pdev); +} +subsys_initcall(ssi_init); |