OK ;) On Sat, 14 Jun 2003, Greg KH wrote: > Care to make a 2.5 patch too? > > thanks, > > greg k-h > -- -------------- next part -------------- diff -ruN --exclude='\.*' linux-2.5.71/drivers/i2c/Kconfig linux-2.5.71-p1/drivers/i2c/Kconfig --- linux-2.5.71/drivers/i2c/Kconfig 2003-06-14 21:18:01.000000000 +0200 +++ linux-2.5.71-p1/drivers/i2c/Kconfig 2003-06-16 02:01:49.000000000 +0200 @@ -42,6 +42,26 @@ <file:Documentation/modules.txt>. The module will be called i2c-algo-bit. +config I2C_PROSAVAGE + tristate "S3/VIA (Pro)Savage" + depends on I2C_ALGOBIT && PCI && EXPERIMENTAL + help + If you say yes to this option, support will be included for the + I2C bus and DDC bus of the S3VIA embedded Savage4 and ProSavage8 + graphics processors. + chipsets supported: + S3/VIA KM266/VT8375 aka ProSavage8 + S3/VIA KM133/VT8365 aka Savage4 + + This can also be built as a module which can be inserted and removed + while the kernel is running. If you want to compile it as a module, + say M here and read <file:Documentation/modules.txt>. + The module will be called i2c-prosavage. + + You will also need the latest user-space utilties: you can find them + in the lm_sensors package, which you can download at + http://www.lm-sensors.nu + config I2C_PHILIPSPAR tristate "Philips style parallel port adapter" depends on I2C_ALGOBIT && PARPORT diff -ruN --exclude='\.*' linux-2.5.71/drivers/i2c/Makefile linux-2.5.71-p1/drivers/i2c/Makefile --- linux-2.5.71/drivers/i2c/Makefile 2003-06-14 21:17:56.000000000 +0200 +++ linux-2.5.71-p1/drivers/i2c/Makefile 2003-06-16 01:57:44.000000000 +0200 @@ -5,6 +5,7 @@ obj-$(CONFIG_I2C) += i2c-core.o obj-$(CONFIG_I2C_CHARDEV) += i2c-dev.o obj-$(CONFIG_I2C_ALGOBIT) += i2c-algo-bit.o +obj-$(CONFIG_I2C_PROSAVAGE) += i2c-prosavage.o obj-$(CONFIG_I2C_PHILIPSPAR) += i2c-philips-par.o obj-$(CONFIG_I2C_ELV) += i2c-elv.o obj-$(CONFIG_I2C_VELLEMAN) += i2c-velleman.o diff -ruN --exclude='\.*' linux-2.5.71/drivers/i2c/i2c-prosavage.c linux-2.5.71-p1/drivers/i2c/i2c-prosavage.c --- linux-2.5.71/drivers/i2c/i2c-prosavage.c 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.5.71-p1/drivers/i2c/i2c-prosavage.c 2003-06-17 23:12:39.000000000 +0200 @@ -0,0 +1,329 @@ +/* + * kernel/busses/i2c-prosavage.c + * + * i2c bus driver for S3/VIA 8365/8375 graphics processor. + * Copyright (c) 2003 Henk Vergonet <henk at god.dyndns.org> + * Based on code written by: + * Frodo Looijaard <frodol at dds.nl>, + * Philip Edelbrock <phil at netroedge.com>, + * Ralph Metzler <rjkm at thp.uni-koeln.de>, and + * Mark D. Studebaker <mdsxyz123 at yahoo.com> + * Simon Vogl + * and others + * + * Please read the lm_sensors documentation for details on use. + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ +/* 18-05-2003 HVE - created + * 14-06-2003 HVE - adapted for lm_sensors2 + * 17-06-2003 HVE - linux 2.5.xx compatible + * + * This driver interfaces to the I2C bus of the VIA north bridge embedded + * ProSavage4/8 devices. Usefull for gaining access to the TV Encoder chips. + * + * Graphics cores: + * S3/VIA KM266/VT8375 aka ProSavage8 + * S3/VIA KM133/VT8365 aka Savage4 + * + * Two serial busses are implemented: + * SERIAL1 - I2C serial communications interface + * SERIAL2 - DDC2 monitor communications interface + * + * Tested on a FX41 mainboard, see http://www.shuttle.com + * + * + * TODO: + * - Robust initialisation code of video registers. + * Get rid of the hardcoded video IO base addresses. + * (Additional documentation needed :( + */ + +#include <linux/version.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/pci.h> +#include <linux/i2c.h> +#include <linux/i2c-algo-bit.h> + +#include <asm/io.h> + + +/* + * driver configuration + */ +#define DRIVER_ID "i2c-prosavage" +#define DRIVER_VERSION "20030617" + + +/* + * i2c configuration + */ +#ifndef I2C_HW_B_S3VIA +#define I2C_HW_B_S3VIA 0x18 /* S3VIA ProSavage adapter */ +#endif + +/* delays */ +#define CYCLE_DELAY 10 +#define TIMEOUT (HZ / 2) + + +/* + * S3/VIA 8365/8375 registers + */ +#ifndef PCI_VENDOR_ID_S3 +#define PCI_VENDOR_ID_S3 0x5333 +#endif +#ifndef PCI_DEVICE_ID_S3_SAVAGE4 +#define PCI_DEVICE_ID_S3_SAVAGE4 0x8a25 +#endif +#ifndef PCI_DEVICE_ID_S3_PROSAVAGE8 +#define PCI_DEVICE_ID_S3_PROSAVAGE8 0x8d04 +#endif + +/* FIXME determine from chip config or use mmio */ +#define VGA_IOBASE0 0x3c0 +#define VGA_IOBASE1 0x3d0 + +#define PCIREG_SUBSYS 0x2c +#define IOREG_SUBSYS 0x81 + +#define IOREG_SERIAL1 0xa0 /* I2C serial communications interface */ +#define MMREG_SERIAL1 0xff20 +#define IOREG_SERIAL2 0xb1 /* DDC2 monitor communications interface */ + +/* based on vt8365 documentation */ +#define I2C_ENAB 0x00000010 +#define I2C_SCL_OUT 0x00000001 +#define I2C_SDA_OUT 0x00000002 +#define I2C_SCL_IN 0x00000004 +#define I2C_SDA_IN 0x00000008 + + +/* + * Manipulate the extended video registers + * + * TODO: spinlocks with other code sections accessing video registers? + */ +static inline unsigned int getCR0(unsigned int cr) +{ + outb_p((unsigned char)cr, VGA_IOBASE0 + 4); + return inb_p(VGA_IOBASE0 + 5); +} + +static inline void setCR0(unsigned int cr, unsigned int val) +{ + outb_p((unsigned char)cr, VGA_IOBASE0 + 4); + outb_p((unsigned char)val, VGA_IOBASE0 + 5); +} + +static inline unsigned int getCR1(unsigned int cr) +{ + outb_p((unsigned char)cr, VGA_IOBASE1 + 4); + return inb_p(VGA_IOBASE1 + 5); +} + +static inline void setCR1(unsigned int cr, unsigned int val) +{ + outb_p((unsigned char)cr, VGA_IOBASE1 + 4); + outb_p((unsigned char)val, VGA_IOBASE1 + 5); +} + + +/* + * Serial bus line handling + * + * serial communications register as parameter in private data + */ +static void bit_s3via_setscl(void *cr, int val) +{ + unsigned int r; + r = getCR1((unsigned int)cr); + r |= I2C_ENAB; + if(val) r |= I2C_SCL_OUT; + else r &= ~I2C_SCL_OUT; + setCR1((unsigned int)cr, r); +} + +static void bit_s3via_setsda(void *cr, int val) +{ + unsigned int r; + r = getCR1((unsigned int)cr); + r |= I2C_ENAB; /* Enable DDC */ + if(val) r |= I2C_SDA_OUT; + else r &= ~I2C_SDA_OUT; + setCR1((unsigned int)cr, r); +} + +static int bit_s3via_getscl(void *cr) +{ + return (0 != (getCR1((unsigned int)cr) & I2C_SCL_IN)); +} + +static int bit_s3via_getsda(void *cr) +{ + return (0 != (getCR1((unsigned int)cr) & I2C_SDA_IN)); +} + + +#define MAX_BUSSES 2 + +static int i2c_bus_cnt = 0; +static struct s_i2c_bus { + struct i2c_adapter adap; + struct i2c_algo_bit_data algo; +} i2c_bus[MAX_BUSSES]; + +/* + * adapter initialisation + */ +static int i2c_register_bus(struct pci_dev *dev, unsigned reg) +{ + struct s_i2c_bus *p; + int ret; + + if(i2c_bus_cnt > MAX_BUSSES) return -ENOSPC; + + p = &i2c_bus[i2c_bus_cnt]; + p->adap.owner = THIS_MODULE; + p->adap.id = I2C_HW_B_S3VIA; + p->adap.algo_data = &p->algo; + p->algo.setsda = bit_s3via_setsda; + p->algo.setscl = bit_s3via_setscl; + p->algo.getsda = bit_s3via_getsda; + p->algo.getscl = bit_s3via_getscl; + p->algo.udelay = CYCLE_DELAY; + p->algo.mdelay = CYCLE_DELAY; + p->algo.timeout = TIMEOUT; + p->algo.data = (void *)reg; + + /* add a xref to the bus number */ + switch(reg) { + case IOREG_SERIAL1: + snprintf(p->adap.dev.name, sizeof(p->adap.dev.name), + "ProSavage I2C bus at %02x:%02x.%x", dev->bus->number, + PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)); + break; + case IOREG_SERIAL2: + snprintf(p->adap.dev.name, sizeof(p->adap.dev.name), + "ProSavage DDC bus at %02x:%02x.%x", dev->bus->number, + PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)); + break; + default: + return -ENODEV; + } + + ret = i2c_bit_add_bus(&p->adap); + if(ret) return ret; + + i2c_bus_cnt++; + return 0; +} + + +/* + * Detect chip and initialize it + */ +static int __devinit prosavage_probe(struct pci_dev *dev, const struct pci_device_id *id) +{ + int i, ret; + u8 tmp; + + /* + * Compare subsystem ID's of pci space and video register space. + * This could be usefull if more than 1 video device is installed. If + * the video io registers are redirected to an other video card we + * assume the subsystem ID's do not match and we should abort the + * installation. + */ + for(i=0; i<4; i++) { + pci_read_config_byte(dev, PCIREG_SUBSYS + i, &tmp); + if(tmp != (u8)getCR1(IOREG_SUBSYS + i)) { + printk(DRIVER_ID ": Video IO registers redirected?\n"); + return -ENODEV; + } + } + + /* + * Chip initialisation + */ + /* Unlock Extended IO Space ??? */ + + ret = i2c_register_bus(dev, IOREG_SERIAL1); + if(ret) return ret; + + ret = i2c_register_bus(dev, IOREG_SERIAL2); + return ret; +} + +static void __devexit prosavage_remove(struct pci_dev *dev) +{ + int ret; + while(i2c_bus_cnt > 0) { + i2c_bus_cnt--; + ret = i2c_bit_del_bus(&i2c_bus[i2c_bus_cnt].adap); + if(ret) + printk(DRIVER_ID ": %s not removed\n", + i2c_bus[i2c_bus_cnt].adap.dev.name); + } +} + + +/* + * Data for PCI driver interface + */ +static struct pci_device_id prosavage_pci_tbl[] __devinitdata = { + { + .vendor = PCI_VENDOR_ID_S3, + .device = PCI_DEVICE_ID_S3_SAVAGE4, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + },{ + .vendor = PCI_VENDOR_ID_S3, + .device = PCI_DEVICE_ID_S3_PROSAVAGE8, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + },{ 0, } +}; + +static struct pci_driver prosavage_driver = { + .name = "s3via-smbus", + .id_table = prosavage_pci_tbl, + .probe = prosavage_probe, + .remove = __devexit_p(prosavage_remove), +}; + +static int __init i2c_prosavage_init(void) +{ + i2c_bus_cnt = 0; + memset(&i2c_bus, 0, sizeof(i2c_bus)); + + printk(DRIVER_ID " version %s (%s)\n", I2C_VERSION, DRIVER_VERSION); + return pci_module_init(&prosavage_driver); +} + +static void __exit i2c_prosavage_exit(void) +{ + pci_unregister_driver(&prosavage_driver); +} + +MODULE_DEVICE_TABLE(pci, prosavage_pci_tbl); +MODULE_AUTHOR("Henk Vergonet"); +MODULE_DESCRIPTION("ProSavage VIA 8365/8375 smbus driver"); +MODULE_LICENSE("GPL"); + +module_init (i2c_prosavage_init); +module_exit (i2c_prosavage_exit);
