Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/i2c/busses/i2c-prosavage.c b/drivers/i2c/busses/i2c-prosavage.c
new file mode 100644
index 0000000..13d6628
--- /dev/null
+++ b/drivers/i2c/busses/i2c-prosavage.c
@@ -0,0 +1,334 @@
+/*
+ * kernel/busses/i2c-prosavage.c
+ *
+ * i2c bus driver for S3/VIA 8365/8375 graphics processor.
+ * Copyright (c) 2003 Henk Vergonet <henk@god.dyndns.org>
+ * Based on code written by:
+ * Frodo Looijaard <frodol@dds.nl>,
+ * Philip Edelbrock <phil@netroedge.com>,
+ * Ralph Metzler <rjkm@thp.uni-koeln.de>, and
+ * Mark D. Studebaker <mdsxyz123@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
+ * 18-06-2003 HVE - codingstyle
+ * 21-06-2003 HVE - compatibility lm_sensors2 and linux 2.5.xx
+ * codingstyle, mmio enabled
+ *
+ * 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:
+ * - integration with prosavage framebuffer device
+ * (Additional documentation needed :(
+ */
+
+#include <linux/config.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 MAX_BUSSES 2
+
+struct s_i2c_bus {
+ void __iomem *mmvga;
+ int i2c_reg;
+ int adap_ok;
+ struct i2c_adapter adap;
+ struct i2c_algo_bit_data algo;
+};
+
+struct s_i2c_chip {
+ void __iomem *mmio;
+ struct s_i2c_bus i2c_bus[MAX_BUSSES];
+};
+
+
+/*
+ * 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
+ */
+#define VGA_CR_IX 0x3d4
+#define VGA_CR_DATA 0x3d5
+
+#define CR_SERIAL1 0xa0 /* I2C serial communications interface */
+#define MM_SERIAL1 0xff20
+#define CR_SERIAL2 0xb1 /* DDC2 monitor communications interface */
+
+/* based on vt8365 documentation */
+#define I2C_ENAB 0x10
+#define I2C_SCL_OUT 0x01
+#define I2C_SDA_OUT 0x02
+#define I2C_SCL_IN 0x04
+#define I2C_SDA_IN 0x08
+
+#define SET_CR_IX(p, val) writeb((val), (p)->mmvga + VGA_CR_IX)
+#define SET_CR_DATA(p, val) writeb((val), (p)->mmvga + VGA_CR_DATA)
+#define GET_CR_DATA(p) readb((p)->mmvga + VGA_CR_DATA)
+
+
+/*
+ * Serial bus line handling
+ *
+ * serial communications register as parameter in private data
+ *
+ * TODO: locks with other code sections accessing video registers?
+ */
+static void bit_s3via_setscl(void *bus, int val)
+{
+ struct s_i2c_bus *p = (struct s_i2c_bus *)bus;
+ unsigned int r;
+
+ SET_CR_IX(p, p->i2c_reg);
+ r = GET_CR_DATA(p);
+ r |= I2C_ENAB;
+ if (val) {
+ r |= I2C_SCL_OUT;
+ } else {
+ r &= ~I2C_SCL_OUT;
+ }
+ SET_CR_DATA(p, r);
+}
+
+static void bit_s3via_setsda(void *bus, int val)
+{
+ struct s_i2c_bus *p = (struct s_i2c_bus *)bus;
+ unsigned int r;
+
+ SET_CR_IX(p, p->i2c_reg);
+ r = GET_CR_DATA(p);
+ r |= I2C_ENAB;
+ if (val) {
+ r |= I2C_SDA_OUT;
+ } else {
+ r &= ~I2C_SDA_OUT;
+ }
+ SET_CR_DATA(p, r);
+}
+
+static int bit_s3via_getscl(void *bus)
+{
+ struct s_i2c_bus *p = (struct s_i2c_bus *)bus;
+
+ SET_CR_IX(p, p->i2c_reg);
+ return (0 != (GET_CR_DATA(p) & I2C_SCL_IN));
+}
+
+static int bit_s3via_getsda(void *bus)
+{
+ struct s_i2c_bus *p = (struct s_i2c_bus *)bus;
+
+ SET_CR_IX(p, p->i2c_reg);
+ return (0 != (GET_CR_DATA(p) & I2C_SDA_IN));
+}
+
+
+/*
+ * adapter initialisation
+ */
+static int i2c_register_bus(struct pci_dev *dev, struct s_i2c_bus *p, void __iomem *mmvga, u32 i2c_reg)
+{
+ int ret;
+ p->adap.owner = THIS_MODULE;
+ p->adap.id = I2C_HW_B_S3VIA;
+ p->adap.algo_data = &p->algo;
+ p->adap.dev.parent = &dev->dev;
+ 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 = p;
+ p->mmvga = mmvga;
+ p->i2c_reg = i2c_reg;
+
+ ret = i2c_bit_add_bus(&p->adap);
+ if (ret) {
+ return ret;
+ }
+
+ p->adap_ok = 1;
+ return 0;
+}
+
+
+/*
+ * Cleanup stuff
+ */
+static void prosavage_remove(struct pci_dev *dev)
+{
+ struct s_i2c_chip *chip;
+ int i, ret;
+
+ chip = (struct s_i2c_chip *)pci_get_drvdata(dev);
+
+ if (!chip) {
+ return;
+ }
+ for (i = MAX_BUSSES - 1; i >= 0; i--) {
+ if (chip->i2c_bus[i].adap_ok == 0)
+ continue;
+
+ ret = i2c_bit_del_bus(&chip->i2c_bus[i].adap);
+ if (ret) {
+ dev_err(&dev->dev, "%s not removed\n",
+ chip->i2c_bus[i].adap.name);
+ }
+ }
+ if (chip->mmio) {
+ iounmap(chip->mmio);
+ }
+ kfree(chip);
+}
+
+
+/*
+ * Detect chip and initialize it
+ */
+static int __devinit prosavage_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ int ret;
+ unsigned long base, len;
+ struct s_i2c_chip *chip;
+ struct s_i2c_bus *bus;
+
+ pci_set_drvdata(dev, kmalloc(sizeof(struct s_i2c_chip), GFP_KERNEL));
+ chip = (struct s_i2c_chip *)pci_get_drvdata(dev);
+ if (chip == NULL) {
+ return -ENOMEM;
+ }
+
+ memset(chip, 0, sizeof(struct s_i2c_chip));
+
+ base = dev->resource[0].start & PCI_BASE_ADDRESS_MEM_MASK;
+ len = dev->resource[0].end - base + 1;
+ chip->mmio = ioremap_nocache(base, len);
+
+ if (chip->mmio == NULL) {
+ dev_err(&dev->dev, "ioremap failed\n");
+ prosavage_remove(dev);
+ return -ENODEV;
+ }
+
+
+ /*
+ * Chip initialisation
+ */
+ /* Unlock Extended IO Space ??? */
+
+
+ /*
+ * i2c bus registration
+ */
+ bus = &chip->i2c_bus[0];
+ snprintf(bus->adap.name, sizeof(bus->adap.name),
+ "ProSavage I2C bus at %02x:%02x.%x",
+ dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
+ ret = i2c_register_bus(dev, bus, chip->mmio + 0x8000, CR_SERIAL1);
+ if (ret) {
+ goto err_adap;
+ }
+ /*
+ * ddc bus registration
+ */
+ bus = &chip->i2c_bus[1];
+ snprintf(bus->adap.name, sizeof(bus->adap.name),
+ "ProSavage DDC bus at %02x:%02x.%x",
+ dev->bus->number, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
+ ret = i2c_register_bus(dev, bus, chip->mmio + 0x8000, CR_SERIAL2);
+ if (ret) {
+ goto err_adap;
+ }
+ return 0;
+err_adap:
+ dev_err(&dev->dev, "%s failed\n", bus->adap.name);
+ prosavage_remove(dev);
+ return ret;
+}
+
+
+/*
+ * Data for PCI driver interface
+ */
+static struct pci_device_id prosavage_pci_tbl[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_SAVAGE4) },
+ { PCI_DEVICE(PCI_VENDOR_ID_S3, PCI_DEVICE_ID_S3_PROSAVAGE8) },
+ { 0, },
+};
+
+MODULE_DEVICE_TABLE (pci, prosavage_pci_tbl);
+
+static struct pci_driver prosavage_driver = {
+ .name = "prosavage_smbus",
+ .id_table = prosavage_pci_tbl,
+ .probe = prosavage_probe,
+ .remove = prosavage_remove,
+};
+
+static int __init i2c_prosavage_init(void)
+{
+ return pci_register_driver(&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);