/* * $Header: /home/cvs/BIR/ca-cpu/freebios/src/superio/smsc/lpc47n217/superio.c,v 1.1.1.1 2005/07/11 15:28:51 smagnani Exp $ * * superio.c: RAM-based driver for SMSC LPC47N217 Super I/O chip * * Based on LinuxBIOS code for SMSC 47B397: * Copyright 2000 AG Electronics Ltd. * Copyright 2003-2004 Linux Networx * Copyright 2004 Tyan * * Copyright (C) 2005 Digital Design Corporation * * 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; either version 2 of the License, or * (at your option) any later version. * * 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 * * $Log: superio.c,v $ * Revision 1.1.1.1 2005/07/11 15:28:51 smagnani * Initial revision. * * */ #include #include #include #include #include #include #include #include #include #include "chip.h" #include "lpc47n217.h" // Forward declarations static void enable_dev(device_t dev); void lpc47n217_pnp_set_resources(device_t dev); void lpc47n217_pnp_enable_resources(device_t dev); void lpc47n217_pnp_enable(device_t dev); static void lpc47n217_init(device_t dev); static void lpc47n217_pnp_set_resource(device_t dev, struct resource *resource); void lpc47n217_pnp_set_iobase(device_t dev, unsigned iobase); void lpc47n217_pnp_set_drq(device_t dev, unsigned drq); void lpc47n217_pnp_set_irq(device_t dev, unsigned irq); void lpc47n217_pnp_set_enable(device_t dev, int enable); static void pnp_enter_conf_state(device_t dev); static void pnp_exit_conf_state(device_t dev); struct chip_operations superio_smsc_lpc47n217_ops = { CHIP_NAME("smsc lpc47n217") .enable_dev = enable_dev, }; static struct device_operations ops = { .read_resources = pnp_read_resources, .set_resources = lpc47n217_pnp_set_resources, .enable_resources = lpc47n217_pnp_enable_resources, .enable = lpc47n217_pnp_enable, .init = lpc47n217_init, }; static struct pnp_info pnp_dev_info[] = { { &ops, LPC47N217_PP, PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0}, }, { &ops, LPC47N217_SP1, PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, }, { &ops, LPC47N217_SP2, PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, } }; /**********************************************************************************/ /* PUBLIC INTERFACE */ /**********************************************************************************/ //---------------------------------------------------------------------------------- // Function: enable_dev // Parameters: dev - pointer to structure describing a Super I/O device // Return Value: None // Description: Create device structures and allocate resources to devices // specified in the pnp_dev_info array (above). // static void enable_dev(device_t dev) { pnp_enable_devices(dev, &pnp_ops, sizeof(pnp_dev_info)/sizeof(pnp_dev_info[0]), pnp_dev_info); } //---------------------------------------------------------------------------------- // Function: lpc47n217_pnp_set_resources // Parameters: dev - pointer to structure describing a Super I/O device // Return Value: None // Description: Configure the specified Super I/O device with the resources // (I/O space, etc.) that have been allocate for it. // void lpc47n217_pnp_set_resources(device_t dev) { int i; pnp_enter_conf_state(dev); // NOTE: Cannot use pnp_set_resources() here because it assumes chip // support for logical devices, which the LPC47N217 doesn't have for(i = 0; i < dev->resources; i++) lpc47n217_pnp_set_resource(dev, &dev->resource[i]); // dump_pnp_device(dev); pnp_exit_conf_state(dev); } void lpc47n217_pnp_enable_resources(device_t dev) { pnp_enter_conf_state(dev); // NOTE: Cannot use pnp_enable_resources() here because it assumes chip // support for logical devices, which the LPC47N217 doesn't have lpc47n217_pnp_set_enable(dev, 1); pnp_exit_conf_state(dev); } void lpc47n217_pnp_enable(device_t dev) { pnp_enter_conf_state(dev); // NOTE: Cannot use pnp_set_enable() here because it assumes chip // support for logical devices, which the LPC47N217 doesn't have if(dev->enabled) { lpc47n217_pnp_set_enable(dev, 1); } else { lpc47n217_pnp_set_enable(dev, 0); } pnp_exit_conf_state(dev); } //---------------------------------------------------------------------------------- // Function: lpc47n217_init // Parameters: dev - pointer to structure describing a Super I/O device // Return Value: None // Description: Initialize the specified Super I/O device. // Devices other than COM ports are ignored. // For COM ports, we configure the baud rate. // static void lpc47n217_init(device_t dev) { struct superio_smsc_lpc47n217_config* conf = dev->chip_info; struct resource *res0; if (!dev->enabled) return; switch(dev->path.u.pnp.device) { case LPC47N217_SP1: res0 = find_resource(dev, PNP_IDX_IO0); init_uart8250(res0->base, &conf->com1); break; case LPC47N217_SP2: res0 = find_resource(dev, PNP_IDX_IO0); init_uart8250(res0->base, &conf->com2); break; } } /**********************************************************************************/ /* PRIVATE FUNCTIONS */ /**********************************************************************************/ static void lpc47n217_pnp_set_resource(device_t dev, struct resource *resource) { if (!(resource->flags & IORESOURCE_ASSIGNED)) { printk_err("ERROR: %s %02x 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 LPC47N217 doesn't have if (resource->flags & IORESOURCE_IO) { lpc47n217_pnp_set_iobase(dev, resource->base); } else if (resource->flags & IORESOURCE_DRQ) { lpc47n217_pnp_set_drq(dev, resource->base); } else if (resource->flags & IORESOURCE_IRQ) { lpc47n217_pnp_set_irq(dev, resource->base); } else { printk_err("ERROR: %s %02x unknown resource type\n", dev_path(dev), resource->index); return; } resource->flags |= IORESOURCE_STORED; report_resource_stored(dev, resource, ""); } void lpc47n217_pnp_set_iobase(device_t dev, unsigned iobase) { ASSERT(!(iobase & 0x3)); switch(dev->path.u.pnp.device) { case LPC47N217_PP: pnp_write_config(dev, 0x23, (iobase >> 2) & 0xff); break; case LPC47N217_SP1: pnp_write_config(dev, 0x24, (iobase >> 2) & 0xff); break; case LPC47N217_SP2: pnp_write_config(dev, 0x25, (iobase >> 2) & 0xff); break; default: BUG(); break; } } void lpc47n217_pnp_set_drq(device_t dev, unsigned drq) { if (dev->path.u.pnp.device == LPC47N217_PP) { const uint8_t PP_DMA_MASK = 0x0F; const uint8_t PP_DMA_SELECTION_REGISTER = 0x26; uint8_t current_config = pnp_read_config(dev, PP_DMA_SELECTION_REGISTER); uint8_t new_config; 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 lpc47n217_pnp_set_irq(device_t dev, unsigned irq) { uint8_t irq_config_register = 0; uint8_t irq_config_mask = 0; uint8_t current_config; uint8_t new_config; switch(dev->path.u.pnp.device) { case LPC47N217_PP: irq_config_register = 0x27; irq_config_mask = 0x0F; break; case LPC47N217_SP1: irq_config_register = 0x28; irq_config_mask = 0xF0; irq <<= 4; break; case LPC47N217_SP2: irq_config_register = 0x28; irq_config_mask = 0x0F; break; default: BUG(); return; } ASSERT(!(irq & ~irq_config_mask)); // IRQ out of range?? 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 lpc47n217_pnp_set_enable(device_t dev, int enable) { uint8_t power_register = 0; uint8_t power_mask = 0; uint8_t current_power; uint8_t new_power; switch(dev->path.u.pnp.device) { case LPC47N217_PP: power_register = 0x01; power_mask = 0x04; break; case LPC47N217_SP1: power_register = 0x02; power_mask = 0x08; break; case LPC47N217_SP2: power_register = 0x02; power_mask = 0x80; 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 = find_resource(dev, PNP_IDX_IO0); lpc47n217_pnp_set_iobase(dev, ioport_resource->base); new_power |= power_mask; // Enable } else { lpc47n217_pnp_set_iobase(dev, 0); } pnp_write_config(dev, power_register, new_power); } //---------------------------------------------------------------------------------- // Function: pnp_enter_conf_state // Parameters: dev - pointer to structure describing a Super I/O device // Return Value: None // Description: Enable access to the LPC47N217's configuration registers. // static void pnp_enter_conf_state(device_t dev) { outb(0x55, dev->path.u.pnp.port); } //---------------------------------------------------------------------------------- // Function: pnp_exit_conf_state // Parameters: dev - pointer to structure describing a Super I/O device // Return Value: None // Description: Disable access to the LPC47N217's configuration registers. // static void pnp_exit_conf_state(device_t dev) { outb(0xaa, dev->path.u.pnp.port); } #if 0 //---------------------------------------------------------------------------------- // Function: dump_pnp_device // Parameters: dev - pointer to structure describing a Super I/O device // Return Value: None // Description: Print the values of all of the LPC47N217's configuration registers. // NOTE: The LPC47N217 must be in configuration mode when this // function is called. // static void dump_pnp_device(device_t dev) { int register_index; print_debug("\r\n"); for(register_index = 0; register_index <= LPC47N217_MAX_CONFIG_REGISTER; register_index++) { uint8_t register_value; if ((register_index & 0x0f) == 0) { print_debug_hex8(register_index); print_debug_char(':'); } // Skip over 'register' that would cause exit from configuration mode if (register_index == 0xaa) register_value = 0xaa; else register_value = pnp_read_config(dev, register_index); print_debug_char(' '); print_debug_hex8(register_value); if ((register_index & 0x0f) == 0x0f) { print_debug("\r\n"); } } print_debug("\r\n"); } #endif