diff options
Diffstat (limited to 'src/devices/pnp_device.c')
| -rw-r--r-- | src/devices/pnp_device.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/src/devices/pnp_device.c b/src/devices/pnp_device.c new file mode 100644 index 0000000000..0bccd7d151 --- /dev/null +++ b/src/devices/pnp_device.c @@ -0,0 +1,217 @@ +/* Copyright 2004 Linux Networx */ +/* This code is distrubted wihtout warrant under the GPL v2 (see COPYING) */ + +#include <console/console.h> +#include <stdlib.h> +#include <stdint.h> +#include <bitops.h> +#include <string.h> +#include <arch/io.h> +#include <device/device.h> +#include <device/pnp.h> + + +/* PNP fundamental operations */ + +void pnp_write_config(device_t dev, uint8_t reg, uint8_t value) +{ + outb(reg, dev->path.u.pnp.port); + outb(value, dev->path.u.pnp.port + 1); +} + +uint8_t pnp_read_config(device_t dev, uint8_t reg) +{ + outb(reg, dev->path.u.pnp.port); + return inb(dev->path.u.pnp.port + 1); +} + +void pnp_set_logical_device(device_t dev) +{ + pnp_write_config(dev, 0x07, dev->path.u.pnp.device); +} + +void pnp_set_enable(device_t dev, int enable) +{ + pnp_write_config(dev, 0x30, enable?0x1:0x0); +} + +int pnp_read_enable(device_t dev) +{ + return !!pnp_read_config(dev, 0x30); +} + +void pnp_set_iobase(device_t dev, unsigned index, unsigned iobase) +{ + /* Index == 0x60 or 0x62 */ + pnp_write_config(dev, index + 0, (iobase >> 8) & 0xff); + pnp_write_config(dev, index + 1, iobase & 0xff); +} + +void pnp_set_irq(device_t dev, unsigned index, unsigned irq) +{ + /* Index == 0x70 or 0x72 */ + pnp_write_config(dev, index, irq); +} + + +void pnp_set_drq(device_t dev, unsigned drq, unsigned index) +{ + /* Index == 0x74 */ + pnp_write_config(dev, index, drq & 0xff); +} + +/* PNP device operations */ + +void pnp_read_resources(device_t dev) +{ + return; +} + +static void pnp_set_resource(device_t dev, struct resource *resource) +{ + if (!(resource->flags & IORESOURCE_ASSIGNED)) { +#if 1 + printk_err("ERROR: %s %02x not allocated\n", + dev_path(dev), resource->index); +#endif + return; + } + /* Now store the resource */ + resource->flags |= IORESOURCE_STORED; + if (resource->flags & IORESOURCE_IO) { + pnp_set_iobase(dev, resource->index, resource->base); + } + else if (resource->flags & IORESOURCE_DRQ) { + pnp_set_drq(dev, resource->index, resource->base); + } + else if (resource->flags & IORESOURCE_IRQ) { + pnp_set_irq(dev, resource->index, resource->base); + } + else { + /* Don't let me think I stored the resource */ + resource->flags &= IORESOURCE_STORED; + printk_err("ERROR: %s %02x unknown resource type\n", + dev_path(dev), resource->index); + return; + } + + printk_debug( + "%s %02x <- [0x%08lx - 0x%08lx] %s\n", + dev_path(dev), + resource->index, + resource->base, resource->base + resource->size - 1, + (resource->flags & IORESOURCE_IO)? "io": + (resource->flags & IORESOURCE_DRQ)? "drq": + (resource->flags & IORESOURCE_IRQ)? "irq": + (resource->flags & IORESOURCE_MEM)? "mem": + "???"); +} + +void pnp_set_resources(device_t dev) +{ + int i; + + /* Select the device */ + pnp_set_logical_device(dev); + + /* Paranoia says I should disable the device here... */ + for(i = 0; i < dev->resources; i++) { + pnp_set_resource(dev, &dev->resource[i]); + } +} + +void pnp_enable_resources(device_t dev) +{ + pnp_set_logical_device(dev); + pnp_set_enable(dev, 1); + +} + +void pnp_enable(device_t dev) +{ + pnp_set_logical_device(dev); + if (!dev->enable) { + pnp_set_enable(dev, 0); + } +} + +struct device_operations pnp_ops = { + .read_resources = pnp_read_resources, + .set_resources = pnp_set_resources, + .enable_resources = pnp_enable_resources, + .enable = pnp_enable, +}; + +/* PNP chip opertations */ + +static void pnp_get_ioresource(device_t dev, unsigned index, struct io_info *info) +{ + struct resource *resource; + uint32_t size; + resource = get_resource(dev, index); + + /* Initilize the resource */ + resource->limit = 0xffff; + resource->flags |= IORESOURCE_IO; + + /* Set the resource size and alignment */ + size = (0xffff & info->mask); + resource->size = (~(size | 0xfffff800) + 1); + resource->align = log2(resource->size); + resource->gran = resource->align; +} + +static void get_resources(device_t dev, struct pnp_info *info) +{ + struct resource *resource; + + pnp_set_logical_device(dev); + + if (info->flags & PNP_IO0) { + pnp_get_ioresource(dev, PNP_IDX_IO0, &info->io0); + } + if (info->flags & PNP_IO1) { + pnp_get_ioresource(dev, PNP_IDX_IO1, &info->io1); + } + if (info->flags & PNP_IRQ0) { + resource = get_resource(dev, PNP_IDX_IRQ0); + resource->size = 1; + resource->flags |= IORESOURCE_IRQ; + } + if (info->flags & PNP_IRQ1) { + resource = get_resource(dev, PNP_IDX_IRQ1); + resource->size = 1; + resource->flags |= IORESOURCE_IRQ; + } + if (info->flags & PNP_DRQ0) { + resource = get_resource(dev, PNP_IDX_DRQ0); + resource->size = 1; + resource->flags |= IORESOURCE_DRQ; + } + if (info->flags & PNP_DRQ1) { + resource = get_resource(dev, PNP_IDX_DRQ1); + resource->size = 1; + resource->flags |= IORESOURCE_DRQ; + } + +} + +void pnp_enumerate(struct chip *chip, unsigned functions, + struct device_operations *ops, struct pnp_info *info) +{ + struct device_path path; + device_t dev; + int i; + + chip_enumerate(chip); + path.type = DEVICE_PATH_PNP; + path.u.pnp.port = chip->dev->path.u.pnp.port; + + /* Setup the ops and resources on the newly allocated devices */ + for(i = 0; i < functions; i++) { + path.u.pnp.device = info[i].function; + dev = alloc_find_dev(chip->bus, &path); + dev->ops = ops; + get_resources(dev, &info[i]); + } +} |