| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2005 Digital Design Corporation |
| * Copyright (C) 2008-2009 coresystems GmbH |
| * |
| * 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. |
| */ |
| |
| /* RAM-based driver for SMSC LPC47N227 Super I/O chip. */ |
| |
| #include <device/device.h> |
| #include <device/pnp.h> |
| #include <console/console.h> |
| #include <assert.h> |
| #include <pc80/keyboard.h> |
| #include <superio/conf_mode.h> |
| |
| #include "lpc47n227.h" |
| |
| /* Forward declarations. */ |
| static void enable_dev(struct device *dev); |
| void lpc47n227_pnp_set_resources(struct device *dev); |
| void lpc47n227_pnp_enable_resources(struct device *dev); |
| void lpc47n227_pnp_enable(struct device *dev); |
| static void lpc47n227_init(struct device *dev); |
| static void lpc47n227_pnp_set_resource(struct device *dev, struct resource *resource); |
| void lpc47n227_pnp_set_iobase(struct device *dev, u16 iobase); |
| void lpc47n227_pnp_set_drq(struct device *dev, u8 drq); |
| void lpc47n227_pnp_set_irq(struct device *dev, u8 irq); |
| void lpc47n227_pnp_set_enable(struct device *dev, int enable); |
| |
| struct chip_operations superio_smsc_lpc47n227_ops = { |
| CHIP_NAME("SMSC LPC47N227 Super I/O") |
| .enable_dev = enable_dev, |
| }; |
| |
| static struct device_operations ops = { |
| .read_resources = pnp_read_resources, |
| .set_resources = lpc47n227_pnp_set_resources, |
| .enable_resources = lpc47n227_pnp_enable_resources, |
| .enable = lpc47n227_pnp_enable, |
| .init = lpc47n227_init, |
| }; |
| |
| static struct pnp_info pnp_dev_info[] = { |
| { NULL, LPC47N227_PP, PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, 0x07f8, }, |
| { NULL, LPC47N227_SP1, PNP_IO0 | PNP_IRQ0, 0x07f8, }, |
| { NULL, LPC47N227_SP2, PNP_IO0 | PNP_IRQ0, 0x07f8, }, |
| { NULL, LPC47N227_KBDC, PNP_IO0 | PNP_IO1 | PNP_IRQ0, 0x07f8, 0x07f8, }, |
| }; |
| |
| /** |
| * Create device structures and allocate resources to devices specified in the |
| * pnp_dev_info array (above). |
| * |
| * @param dev Pointer to structure describing a Super I/O device. |
| */ |
| static void enable_dev(struct device *dev) |
| { |
| pnp_enable_devices(dev, &ops, ARRAY_SIZE(pnp_dev_info), pnp_dev_info); |
| } |
| |
| /** |
| * Configure the specified Super I/O device with the resources (I/O space, |
| * etc.) that have been allocate for it. |
| * |
| * NOTE: Cannot use pnp_set_resources() here because it assumes chip |
| * support for logical devices, which the LPC47N227 doesn't have. |
| * |
| * @param dev Pointer to structure describing a Super I/O device. |
| */ |
| void lpc47n227_pnp_set_resources(struct device *dev) |
| { |
| struct resource *res; |
| |
| pnp_enter_conf_mode_55(dev); |
| for (res = dev->resource_list; res; res = res->next) |
| lpc47n227_pnp_set_resource(dev, res); |
| pnp_exit_conf_mode_aa(dev); |
| } |
| |
| /* |
| * NOTE: Cannot use pnp_enable_resources() here because it assumes chip |
| * support for logical devices, which the LPC47N227 doesn't have. |
| */ |
| void lpc47n227_pnp_enable_resources(struct device *dev) |
| { |
| pnp_enter_conf_mode_55(dev); |
| lpc47n227_pnp_set_enable(dev, 1); |
| pnp_exit_conf_mode_aa(dev); |
| } |
| |
| /* |
| * NOTE: Cannot use pnp_set_enable() here because it assumes chip |
| * support for logical devices, which the LPC47N227 doesn't have. |
| */ |
| void lpc47n227_pnp_enable(struct device *dev) |
| { |
| pnp_enter_conf_mode_55(dev); |
| lpc47n227_pnp_set_enable(dev, !!dev->enabled); |
| pnp_exit_conf_mode_aa(dev); |
| } |
| |
| /** |
| * Initialize the specified Super I/O device. |
| * |
| * Devices other than COM ports and keyboard controller are ignored. |
| * For COM ports, we configure the baud rate. |
| * |
| * @param dev Pointer to structure describing a Super I/O device. |
| */ |
| static void lpc47n227_init(struct device *dev) |
| { |
| |
| if (!dev->enabled) |
| return; |
| |
| switch (dev->path.pnp.device) { |
| case LPC47N227_KBDC: |
| printk(BIOS_DEBUG, "LPC47N227: Initializing keyboard.\n"); |
| pc_keyboard_init(NO_AUX_DEVICE); |
| break; |
| } |
| } |
| |
| static void lpc47n227_pnp_set_resource(struct device *dev, struct resource *resource) |
| { |
| if (!(resource->flags & IORESOURCE_ASSIGNED)) { |
| printk(BIOS_ERR, "ERROR: %s %02lx not allocated\n", |
| dev_path(dev), resource->index); |
| return; |
| } |
| |
| /* Now store the resource. */ |
| /* |
| * NOTE: Cannot use pnp_set_XXX() here because they assume chip |
| * support for logical devices, which the LPC47N227 doesn't have. |
| */ |
| if (resource->flags & IORESOURCE_IO) { |
| lpc47n227_pnp_set_iobase(dev, resource->base); |
| } else if (resource->flags & IORESOURCE_DRQ) { |
| lpc47n227_pnp_set_drq(dev, resource->base); |
| } else if (resource->flags & IORESOURCE_IRQ) { |
| lpc47n227_pnp_set_irq(dev, 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 lpc47n227_pnp_set_iobase(struct device *dev, u16 iobase) |
| { |
| ASSERT(!(iobase & 0x3)); |
| |
| switch (dev->path.pnp.device) { |
| case LPC47N227_PP: |
| pnp_write_config(dev, 0x23, (iobase >> 2) & 0xff); |
| break; |
| case LPC47N227_SP1: |
| pnp_write_config(dev, 0x24, (iobase >> 2) & 0xff); |
| break; |
| case LPC47N227_SP2: |
| pnp_write_config(dev, 0x25, (iobase >> 2) & 0xff); |
| break; |
| case LPC47N227_KBDC: |
| break; |
| default: |
| BUG(); |
| break; |
| } |
| } |
| |
| void lpc47n227_pnp_set_drq(struct device *dev, u8 drq) |
| { |
| const u8 PP_DMA_MASK = 0x0F; |
| const u8 PP_DMA_SELECTION_REGISTER = 0x26; |
| u8 current_config, new_config; |
| |
| if (dev->path.pnp.device == LPC47N227_PP) { |
| current_config = pnp_read_config(dev, |
| PP_DMA_SELECTION_REGISTER); |
| ASSERT(!(drq & ~PP_DMA_MASK)); // DRQ out of range?? |
| new_config = (current_config & ~PP_DMA_MASK) | drq; |
| pnp_write_config(dev, PP_DMA_SELECTION_REGISTER, new_config); |
| } else { |
| BUG(); |
| } |
| } |
| |
| void lpc47n227_pnp_set_irq(struct device *dev, u8 irq) |
| { |
| u8 irq_config_register = 0, irq_config_mask = 0; |
| u8 current_config, new_config; |
| |
| switch (dev->path.pnp.device) { |
| case LPC47N227_PP: |
| irq_config_register = 0x27; |
| irq_config_mask = 0x0F; |
| break; |
| case LPC47N227_SP1: |
| irq_config_register = 0x28; |
| irq_config_mask = 0xF0; |
| irq <<= 4; |
| break; |
| case LPC47N227_SP2: |
| irq_config_register = 0x28; |
| irq_config_mask = 0x0F; |
| break; |
| case LPC47N227_KBDC: |
| break; |
| default: |
| BUG(); |
| return; |
| } |
| |
| current_config = pnp_read_config(dev, irq_config_register); |
| new_config = (current_config & ~irq_config_mask) | irq; |
| pnp_write_config(dev, irq_config_register, new_config); |
| } |
| |
| void lpc47n227_pnp_set_enable(struct device *dev, int enable) |
| { |
| u8 power_register = 0, power_mask = 0, current_power, new_power; |
| |
| switch (dev->path.pnp.device) { |
| case LPC47N227_PP: |
| power_register = 0x01; |
| power_mask = 0x04; |
| break; |
| case LPC47N227_SP1: |
| power_register = 0x02; |
| power_mask = 0x08; |
| break; |
| case LPC47N227_SP2: |
| power_register = 0x02; |
| power_mask = 0x80; |
| break; |
| case LPC47N227_KBDC: |
| break; |
| default: |
| BUG(); |
| return; |
| } |
| |
| current_power = pnp_read_config(dev, power_register); |
| new_power = current_power & ~power_mask; /* Disable by default. */ |
| if (enable) { |
| struct resource *ioport_resource; |
| ioport_resource = find_resource(dev, PNP_IDX_IO0); |
| lpc47n227_pnp_set_iobase(dev, ioport_resource->base); |
| new_power |= power_mask; /* Enable. */ |
| } else { |
| lpc47n227_pnp_set_iobase(dev, 0); |
| } |
| pnp_write_config(dev, power_register, new_power); |
| } |