/* * This file is part of the LinuxBIOS project. * * Copyright (C) 2007 Uwe Hermann * * 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 */ /* * Generic driver for pretty much all known Standard Microsystems Corporation * (SMSC) Super I/O chips. * * Datasheets are available from: http://www.smsc.com/main/datasheet.html * * Most of the SMSC Super I/O chips seem to be similar enough (for our * purposes) so that we can handle them with a unified driver. * * So far only the ASUS A8000 has been tested on real hardware! * * The floppy disk controller, the parallel port, the serial ports, and the * keyboard controller should work with all the chips. For the more advanced * stuff (e.g. HWM, ACPI, SMBus) more work is probably required. */ #include #include #include #include #include #include #include #include "chip.h" /* The following Super I/O chips are currently supported by this driver: */ #define FDC37B80X 0x42 /* Same ID: FDC37M70X (a.k.a. FDC37M707) */ #define FDC37B78X 0x44 #define FDC37B72X 0x4c #define FDC37M81X 0x4d #define FDC37M60X 0x47 #define LPC47B27X 0x51 /* a.k.a. LPC47B272 */ #define LPC47M10X 0x59 /* Same ID: LPC47M112, LPC47M13X */ #define LPC47M15X 0x60 /* Same ID: LPC47M192 */ #define LPC47S45X 0x62 #define LPC47B397 0x6f #define A8000 0x77 /* ASUS A8000, a rebranded DME1737(?) */ #define DME1737 0x78 #define SCH5307 0x81 /* Rebranded LPC47B397(?) */ /* Register defines */ #define DEVICE_ID_REG 0x20 /* Device ID register */ #define DEVICE_REV_REG 0x21 /* Device revision register */ /* Static variables for the Super I/O device ID and revision. */ static int first_time = 1; static uint8_t superio_id = 0; static uint8_t superio_rev = 0; /** * A list of all possible logical devices which may be supported by at least * one of the Super I/O chips. These values are used as index into the * logical_device_table[i].devs array(s). * * If you change this enum, you must also adapt the logical_device_table[] * array and MAX_LOGICAL_DEVICES! */ enum { LD_FDC, /* Floppy disk controller */ LD_PP, /* Parallel port */ LD_SP1, /* Serial port 1 (COM1) */ LD_SP2, /* Serial port 2 (COM2) */ LD_RTC, /* Real-time clock */ LD_KBC, /* Keyboard controller */ LD_AUX, /* Auxiliary I/O */ LD_XBUS, /* X-Bus */ LD_HWM, /* Hardware monitor */ LD_GAME, /* Game port */ LD_PME, /* Power management events */ LD_MPU401, /* MPU-401 MIDI UART */ LD_RT, /* Runtime registers / security key registers */ LD_ACPI, /* ACPI */ LD_SMB, /* SMBus */ }; /* Note: This value must match the number of items in the enum above! */ #define MAX_LOGICAL_DEVICES 15 /** * A table describing the logical devices which are present on the * supported Super I/O chips. * * The first entry (superio_id) is the device ID of the Super I/O chip * as stored in the (read-only) DEVICE_ID_REG register. * * The second entry (devs) is the list of logical device IDs which are * present on that particular Super I/O chip. A value of -1 means the * device is not present on that chip. * * Note: Do _not_ list chips with different name but same device ID twice! * The result would be that the init code would be executed twice! */ static const struct logical_devices { uint8_t superio_id; int devs[MAX_LOGICAL_DEVICES]; } logical_device_table[] = { // Chip FDC PP SP1 SP2 RTC KBC AUX XBUS HWM GAME PME MPU RT ACPI SMB {FDC37B80X,{0, 3, 4, 5, -1, 7, 8, -1, -1, -1, -1, -1, -1, -1, -1}}, {FDC37B78X,{0, 3, 4, 5, 6, 7, 8, -1, -1, -1, -1, -1, -1, 10, -1}}, {FDC37B72X,{0, 3, 4, 5, -1, 7, 8, -1, -1, -1, -1, -1, -1, 10, -1}}, {FDC37M81X,{0, 3, 4, 5, -1, 7, 8, -1, -1, -1, -1, -1, -1, -1, -1}}, {FDC37M60X,{0, 3, 4, 5, -1, 7, 8, -1, -1, -1, -1, -1, -1, -1, -1}}, {LPC47B27X,{0, 3, 4, 5, -1, 7, -1, -1, -1, 9, -1, 11, 10, -1, -1}}, {LPC47M10X,{0, 3, 4, 5, -1, 7, -1, -1, -1, 9, 10, 11, -1, -1, -1}}, {LPC47M15X,{0, 3, 4, 5, -1, 7, -1, -1, -1, 9, 10, 11, -1, -1, -1}}, {LPC47S45X,{0, 3, 4, 5, 6, 7, -1, 8, -1, -1, -1, -1, 10, -1, 11}}, {LPC47B397,{0, 3, 4, 5, -1, 7, -1, -1, 8, -1, -1, -1, 10, -1, -1}}, {A8000, {0, 3, 4, 5, -1, 7, -1, -1, -1, -1, -1, -1, 10, -1, -1}}, {DME1737, {0, 3, 4, 5, -1, 7, -1, -1, -1, -1, -1, -1, 10, -1, -1}}, {SCH5307, {0, 3, 4, 5, -1, 7, -1, -1, 8, -1, -1, -1, 10, -1, -1}}, }; /** * Enter the configuration state by writing 0x55 to the config port. * * The Super I/O configuration registers can only be modified when the chip * is in the configuration state. Thus, to program the registers you have * to a) enter config mode, b) program the registers, c) exit config mode. * * @param dev The device to use. */ static inline void smsc_pnp_enter_conf_state(device_t dev) { outb(0x55, dev->path.u.pnp.port); } /** * Exit the configuration state by writing 0xaa to the config port. * * This puts the chip into the 'run' state again. * * @param dev The device to use. */ static inline void smsc_pnp_exit_conf_state(device_t dev) { outb(0xaa, dev->path.u.pnp.port); } /** Wrapper for pnp_set_resources(). */ static void smsc_pnp_set_resources(device_t dev) { smsc_pnp_enter_conf_state(dev); pnp_set_resources(dev); smsc_pnp_exit_conf_state(dev); } /** Wrapper for pnp_enable_resources(). */ static void smsc_pnp_enable_resources(device_t dev) { smsc_pnp_enter_conf_state(dev); pnp_enable_resources(dev); smsc_pnp_exit_conf_state(dev); } /** * If so configured, enable the specified device, otherwise * explicitly disable it. * * @param dev The device to use. */ static void smsc_pnp_enable(device_t dev) { smsc_pnp_enter_conf_state(dev); pnp_set_logical_device(dev); (dev->enabled) ? pnp_set_enable(dev, 1) : pnp_set_enable(dev, 0); smsc_pnp_exit_conf_state(dev); } /** * Initialize those logical devices which need a special init. * * @param dev The device to use. */ static void smsc_init(device_t dev) { struct superio_smsc_smscsuperio_config *conf = dev->chip_info; struct resource *res0, *res1; int i, ld; /* Do not initialize disabled devices. */ if (!dev->enabled) return; /* Find the correct Super I/O. */ for (i = 0; i < ARRAY_SIZE(logical_device_table); i++) if (logical_device_table[i].superio_id == superio_id) break; /* If no Super I/O was found, return. */ if (i == ARRAY_SIZE(logical_device_table)) return; /* A Super I/O was found, so initialize the respective device. */ ld = dev->path.u.pnp.device; if (ld == logical_device_table[i].devs[LD_SP1]) { res0 = find_resource(dev, PNP_IDX_IO0); init_uart8250(res0->base, &conf->com1); } else if (ld == logical_device_table[i].devs[LD_SP2]) { res0 = find_resource(dev, PNP_IDX_IO0); init_uart8250(res0->base, &conf->com2); } else if (ld == logical_device_table[i].devs[LD_KBC]) { res0 = find_resource(dev, PNP_IDX_IO0); res1 = find_resource(dev, PNP_IDX_IO1); init_pc_keyboard(res0->base, res1->base, &conf->keyboard); } } /** Standard device operations. */ static struct device_operations ops = { .read_resources = pnp_read_resources, .set_resources = smsc_pnp_set_resources, .enable_resources = smsc_pnp_enable_resources, .enable = smsc_pnp_enable, .init = smsc_init, }; /** * TODO. * * This table should contain all possible entries for any of the supported * Super I/O chips, even if some of them don't have the respective logical * devices. That will be handled correctly by our code. * * The LD_FOO entries are device markers which tell you the type of the logical * device (e.g. whether it's a floppy disk controller or a serial port etc.). * * Before using pnp_dev_info[] in pnp_enable_devices() these markers have * to be replaced with the real logical device IDs of the respective * Super I/O chip. This is done in enable_dev(). * * TODO: FDC, PP, SP1, SP2, and KBC should work, the rest probably not (yet). */ static struct pnp_info pnp_dev_info[] = { { &ops, LD_FDC, PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0 }, }, { &ops, LD_PP, PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, { 0x07f8, 0 }, }, { &ops, LD_SP1, PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, }, { &ops, LD_SP2, PNP_IO0 | PNP_IRQ0, { 0x7f8, 0 }, }, { &ops, LD_RTC, }, { &ops, LD_KBC, PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_IRQ1, { 0x7ff, 0 }, { 0x7ff, 4 },}, { &ops, LD_AUX, }, { &ops, LD_XBUS, }, { &ops, LD_HWM, PNP_IO0, { 0x7f0, 0 }, }, { &ops, LD_GAME, }, { &ops, LD_PME, }, { &ops, LD_MPU401, }, { &ops, LD_RT, PNP_IO0, { 0x780, 0 }, }, { &ops, LD_ACPI, }, { &ops, LD_SMB, }, }; /** * Enable the logical devices of the Super I/O chip. * * TODO: Think about how to handle the case when a mainboard has multiple * Super I/O chips soldered on. * TODO: Can this code be simplified a bit? * * @param dev The device to use. */ static void enable_dev(device_t dev) { int i, j, fn; int tmp[MAX_LOGICAL_DEVICES]; if (first_time) { /* Read the device ID and revision of the Super I/O chip. */ smsc_pnp_enter_conf_state(dev); superio_id = pnp_read_config(dev, DEVICE_ID_REG); superio_rev = pnp_read_config(dev, DEVICE_REV_REG); smsc_pnp_exit_conf_state(dev); /* TODO: Error handling? */ printk_info("Found SMSC Super I/O (ID=0x%02x, rev=0x%02x)\n", superio_id, superio_rev); first_time = 0; } /* Find the correct Super I/O. */ for (i = 0; i < ARRAY_SIZE(logical_device_table); i++) if (logical_device_table[i].superio_id == superio_id) break; /* If no Super I/O was found, return. */ if (i == ARRAY_SIZE(logical_device_table)) return; /* Temporarily save the LD_FOO values. */ for (j = 0; j < ARRAY_SIZE(pnp_dev_info); j++) tmp[j] = pnp_dev_info[j].function; /* Replace the LD_FOO markers in pnp_dev_info[] with * the real logical device IDs of this Super I/O chip. */ for (j = 0; j < ARRAY_SIZE(pnp_dev_info); j++) { fn = pnp_dev_info[j].function; pnp_dev_info[j].function = logical_device_table[i].devs[fn]; } /* Enable the specified devices (if present on the chip). */ pnp_enable_devices(dev, &pnp_ops, ARRAY_SIZE(pnp_dev_info), &pnp_dev_info); /* Restore LD_FOO values. */ for (j = 0; j < ARRAY_SIZE(pnp_dev_info); j++) pnp_dev_info[j].function = tmp[j]; } struct chip_operations superio_smsc_smscsuperio_ops = { CHIP_NAME("Various SMSC Super I/Os") .enable_dev = enable_dev };