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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* 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 <device/device.h>
#include <device/pnp.h>
#include <superio/conf_mode.h>
#include <console/console.h>
#include <pc80/keyboard.h>
/* The following Super I/O chips are currently supported by this driver: */
#define LPC47M172 0x14
#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 LPC47U33X 0x54
#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 SCH5504 0x79
#define SCH3112 0x7c
#define SCH3114 0x7d
#define SCH5307 0x81 /* Rebranded LPC47B397(?) */
#define SCH5027D 0x89
#define SCH4304 0x90 /* SCH4304, SCH4307 */
#define SCH5147 0xc1
/* Register defines */
#define DEVICE_ID_REG 0x20 /* Device ID register */
#define DEVICE_REV_REG 0x21 /* Device revision register */
#define DEVICE_TEST7_REG 0x29 /* Device test 7 register */
/* Static variables for the Super I/O device ID and revision. */
static int first_time = 1;
static u8 superio_id = 0;
static u8 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 {
u8 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 */
{LPC47M172,{0, 3, 4, 2, -1, 7, -1, -1, -1, -1, -1, -1, 10, -1, -1}},
{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}},
{LPC47U33X,{0, 3, 4, -1, -1, 7, -1, -1, -1, 9, 0, 5, 10, 0, 11}},
{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}},
{SCH5504, {0, 3, 4, 5, -1, 7, -1, -1, -1, -1, -1, -1, 10, -1, -1}},
{SCH3112, {0, 3, 4, 5, -1, 7, -1, -1, -1, -1, -1, -1, 10, -1, -1}},
{SCH3114, {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}},
{SCH5027D, {0, 3, 4, 5, -1, 7, -1, -1, -1, -1, -1, -1, 10, -1, 11}},
{SCH4304, {0, 3, 4, 5, -1, 7, -1, 11, -1, -1, -1, -1, 10, -1, -1}},
{SCH5147, {0, 3, 4, 5, -1, 7, -1, -1, -1, -1, -1, -1, 10, -1, -1}},
};
/**
* Initialize those logical devices which need a special init.
*
* @param dev The device to use.
*/
static void smsc_init(struct device *dev)
{
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.pnp.device;
if (ld == logical_device_table[i].devs[LD_KBC]) {
pc_keyboard_init(NO_AUX_DEVICE);
}
}
/** Standard device operations. */
static struct device_operations ops = {
.read_resources = pnp_read_resources,
.set_resources = pnp_set_resources,
.enable_resources = pnp_enable_resources,
.enable = pnp_alt_enable,
.init = smsc_init,
.ops_pnp_mode = &pnp_conf_mode_55_aa,
};
/**
* 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[] = {
{ NULL, LD_FDC, PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, 0x07f8, },
{ NULL, LD_PP, PNP_IO0 | PNP_IRQ0 | PNP_DRQ0, 0x07f8, },
{ NULL, LD_SP1, PNP_IO0 | PNP_IRQ0, 0x07f8, },
{ NULL, LD_SP2, PNP_IO0 | PNP_IRQ0, 0x07f8, },
{ NULL, LD_RTC, },
{ NULL, LD_KBC, PNP_IO0 | PNP_IO1 | PNP_IRQ0 | PNP_IRQ1,
0x07ff, 0x07ff, },
{ NULL, LD_AUX, },
{ NULL, LD_XBUS, },
{ NULL, LD_HWM, PNP_IO0, 0x07f0, },
{ NULL, LD_GAME, },
{ NULL, LD_PME, },
{ NULL, LD_MPU401, },
{ NULL, LD_RT, PNP_IO0, 0x0780, },
{ NULL, LD_ACPI, },
{ NULL, 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(struct device *dev)
{
int i, j, fn;
int tmp[MAX_LOGICAL_DEVICES];
u8 test7;
if (first_time) {
pnp_enter_conf_mode_55(dev);
/* Read the device ID and revision of the Super I/O chip. */
superio_id = pnp_read_config(dev, DEVICE_ID_REG);
superio_rev = pnp_read_config(dev, DEVICE_REV_REG);
/* TODO: Error handling? */
printk(BIOS_INFO, "Found SMSC Super I/O (ID = 0x%02x, "
"rev = 0x%02x)\n", superio_id, superio_rev);
first_time = 0;
if (superio_id == LPC47M172) {
/*
* Do not use the default logical device number but
* instead the standard SMSC registers set.
*/
/*
* TEST7 configuration register (0x29)
* Bit 0: LD_NUM (0 = new, 1 = std SMSC)
*/
test7 = pnp_read_config(dev, DEVICE_TEST7_REG);
test7 |= (1 << 0);
pnp_write_config(dev, DEVICE_TEST7_REG, test7);
}
pnp_exit_conf_mode_aa(dev);
}
/* 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;
if (logical_device_table[i].devs[fn] != -1)
pnp_dev_info[j].function = logical_device_table[i].devs[fn];
else
pnp_dev_info[j].function = PNP_SKIP_FUNCTION;
}
/* Enable the specified devices (if present on the chip). */
pnp_enable_devices(dev, &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
};
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