| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2004 Linux Networx |
| * (Written by Eric Biederman <ebiederman@lnxi.com> for Linux Networx) |
| * Copyright (C) 2004 Li-Ta Lo <ollie@lanl.gov> |
| * Copyright (C) 2005 Tyan |
| * (Written by Yinghai Lu <yhlu@tyan.com> for Tyan) |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * 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 <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, u8 reg, u8 value) |
| { |
| outb(reg, dev->path.pnp.port); |
| outb(value, dev->path.pnp.port + 1); |
| } |
| |
| u8 pnp_read_config(device_t dev, u8 reg) |
| { |
| outb(reg, dev->path.pnp.port); |
| return inb(dev->path.pnp.port + 1); |
| } |
| |
| void pnp_set_logical_device(device_t dev) |
| { |
| pnp_write_config(dev, 0x07, dev->path.pnp.device & 0xff); |
| } |
| |
| void pnp_set_enable(device_t dev, int enable) |
| { |
| u8 tmp, bitpos; |
| |
| tmp = pnp_read_config(dev, 0x30); |
| |
| /* Handle virtual devices, which share the same LDN register. */ |
| bitpos = (dev->path.pnp.device >> 8) & 0x7; |
| |
| if (enable) |
| tmp |= (1 << bitpos); |
| else |
| tmp &= ~(1 << bitpos); |
| |
| pnp_write_config(dev, 0x30, tmp); |
| } |
| |
| int pnp_read_enable(device_t dev) |
| { |
| u8 tmp, bitpos; |
| |
| tmp = pnp_read_config(dev, 0x30); |
| |
| /* Handle virtual devices, which share the same LDN register. */ |
| bitpos = (dev->path.pnp.device >> 8) & 0x7; |
| |
| return !!(tmp & (1 << bitpos)); |
| } |
| |
| void pnp_set_iobase(device_t dev, u8 index, u16 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, u8 index, u8 irq) |
| { |
| /* Index == 0x70 or 0x72. */ |
| pnp_write_config(dev, index, irq); |
| } |
| |
| void pnp_set_drq(device_t dev, u8 index, u8 drq) |
| { |
| /* 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)) { |
| printk(BIOS_ERR, "ERROR: %s %02lx %s size: 0x%010Lx " |
| "not assigned\n", dev_path(dev), resource->index, |
| resource_type(resource), resource->size); |
| return; |
| } |
| |
| /* Now store the resource. */ |
| 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 { |
| printk(BIOS_ERR, "ERROR: %s %02lx unknown resource type\n", |
| dev_path(dev), resource->index); |
| return; |
| } |
| resource->flags |= IORESOURCE_STORED; |
| |
| report_resource_stored(dev, resource, ""); |
| } |
| |
| void pnp_set_resources(device_t dev) |
| { |
| struct resource *res; |
| |
| /* Select the logical device (LDN). */ |
| pnp_set_logical_device(dev); |
| |
| /* Paranoia says I should disable the device here... */ |
| for (res = dev->resource_list; res; res = res->next) |
| pnp_set_resource(dev, res); |
| } |
| |
| void pnp_enable_resources(device_t dev) |
| { |
| pnp_set_logical_device(dev); |
| pnp_set_enable(dev, 1); |
| } |
| |
| void pnp_enable(device_t dev) |
| { |
| if (!dev->enabled) { |
| pnp_set_logical_device(dev); |
| 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 operations */ |
| |
| static void pnp_get_ioresource(device_t dev, u8 index, struct io_info *info) |
| { |
| struct resource *resource; |
| unsigned moving, gran, step; |
| |
| if (!info->mask) { |
| printk(BIOS_ERR, "ERROR: device %s index %d has no mask.\n", |
| dev_path(dev), index); |
| return; |
| } |
| |
| resource = new_resource(dev, index); |
| |
| /* Initilize the resource. */ |
| resource->limit = 0xffff; |
| resource->flags |= IORESOURCE_IO; |
| |
| /* Get the resource size... */ |
| |
| moving = info->mask; |
| gran = 15; |
| step = 1 << gran; |
| |
| /* Find the first bit that moves. */ |
| while ((moving & step) == 0) { |
| gran--; |
| step >>= 1; |
| } |
| |
| /* Now find the first bit that does not move. */ |
| while ((moving & step) != 0) { |
| gran--; |
| step >>= 1; |
| } |
| |
| /* |
| * Of the moving bits the last bit in the first group, |
| * tells us the size of this resource. |
| */ |
| if ((moving & step) == 0) { |
| gran++; |
| step <<= 1; |
| } |
| |
| /* Set the resource size and alignment. */ |
| resource->gran = gran; |
| resource->align = gran; |
| resource->limit = info->mask | (step - 1); |
| resource->size = 1 << gran; |
| } |
| |
| static void get_resources(device_t dev, struct pnp_info *info) |
| { |
| struct resource *resource; |
| |
| 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_IO2) |
| pnp_get_ioresource(dev, PNP_IDX_IO2, &info->io2); |
| if (info->flags & PNP_IO3) |
| pnp_get_ioresource(dev, PNP_IDX_IO3, &info->io3); |
| |
| if (info->flags & PNP_IRQ0) { |
| resource = new_resource(dev, PNP_IDX_IRQ0); |
| resource->size = 1; |
| resource->flags |= IORESOURCE_IRQ; |
| } |
| if (info->flags & PNP_IRQ1) { |
| resource = new_resource(dev, PNP_IDX_IRQ1); |
| resource->size = 1; |
| resource->flags |= IORESOURCE_IRQ; |
| } |
| |
| if (info->flags & PNP_DRQ0) { |
| resource = new_resource(dev, PNP_IDX_DRQ0); |
| resource->size = 1; |
| resource->flags |= IORESOURCE_DRQ; |
| } |
| if (info->flags & PNP_DRQ1) { |
| resource = new_resource(dev, PNP_IDX_DRQ1); |
| resource->size = 1; |
| resource->flags |= IORESOURCE_DRQ; |
| } |
| |
| /* |
| * These are not IRQs, but set the flag to have the |
| * resource allocator do the right thing. |
| */ |
| if (info->flags & PNP_EN) { |
| resource = new_resource(dev, PNP_IDX_EN); |
| resource->size = 1; |
| resource->flags |= IORESOURCE_IRQ; |
| } |
| if (info->flags & PNP_MSC0) { |
| resource = new_resource(dev, PNP_IDX_MSC0); |
| resource->size = 1; |
| resource->flags |= IORESOURCE_IRQ; |
| } |
| if (info->flags & PNP_MSC1) { |
| resource = new_resource(dev, PNP_IDX_MSC1); |
| resource->size = 1; |
| resource->flags |= IORESOURCE_IRQ; |
| } |
| } |
| |
| void pnp_enable_devices(device_t base_dev, struct device_operations *ops, |
| unsigned int functions, struct pnp_info *info) |
| { |
| struct device_path path; |
| device_t dev; |
| int i; |
| |
| path.type = DEVICE_PATH_PNP; |
| path.pnp.port = base_dev->path.pnp.port; |
| |
| /* Setup the ops and resources on the newly allocated devices. */ |
| for (i = 0; i < functions; i++) { |
| /* Skip logical devices this Super I/O doesn't have. */ |
| if (info[i].function == -1) |
| continue; |
| |
| path.pnp.device = info[i].function; |
| dev = alloc_find_dev(base_dev->bus, &path); |
| |
| /* Don't initialize a device multiple times. */ |
| if (dev->ops) |
| continue; |
| |
| if (info[i].ops == 0) |
| dev->ops = ops; |
| else |
| dev->ops = info[i].ops; |
| |
| get_resources(dev, &info[i]); |
| } |
| } |