Linux-2.6.12-rc2v2.6.12-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!

1 files changed, 183 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-hydra.c b/drivers/i2c/busses/i2c-hydra.c
new file mode 100644
index 000000000000..e0cb3b0f92fa
--- /dev/null
+++ b/drivers/i2c/busses/i2c-hydra.c
@@ -0,0 +1,183 @@
+/*
+    i2c-hydra.c - Part of lm_sensors,  Linux kernel modules
+                  for hardware monitoring
+
+    i2c Support for the Apple `Hydra' Mac I/O
+
+    Copyright (c) 1999-2004 Geert Uytterhoeven <geert@linux-m68k.org>
+
+    Based on i2c Support for Via Technologies 82C586B South Bridge
+    Copyright (c) 1998, 1999 Kyösti Mälkki <kmalkki@cc.hut.fi>
+
+    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.
+*/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/hydra.h>
+
+
+#define HYDRA_CPD_PD0   0x00000001      /* CachePD lines */
+#define HYDRA_CPD_PD1   0x00000002
+#define HYDRA_CPD_PD2   0x00000004
+#define HYDRA_CPD_PD3   0x00000008
+
+#define HYDRA_SCLK      HYDRA_CPD_PD0
+#define HYDRA_SDAT      HYDRA_CPD_PD1
+#define HYDRA_SCLK_OE   0x00000010
+#define HYDRA_SDAT_OE   0x00000020
+
+static inline void pdregw(void *data, u32 val)
+{
+        struct Hydra *hydra = (struct Hydra *)data;
+        writel(val, &hydra->CachePD);
+}
+
+static inline u32 pdregr(void *data)
+{
+        struct Hydra *hydra = (struct Hydra *)data;
+        return readl(&hydra->CachePD);
+}
+
+static void hydra_bit_setscl(void *data, int state)
+{
+        u32 val = pdregr(data);
+        if (state)
+                val &= ~HYDRA_SCLK_OE;
+        else {
+                val &= ~HYDRA_SCLK;
+                val |= HYDRA_SCLK_OE;
+        }
+        pdregw(data, val);
+}
+
+static void hydra_bit_setsda(void *data, int state)
+{
+        u32 val = pdregr(data);
+        if (state)
+                val &= ~HYDRA_SDAT_OE;
+        else {
+                val &= ~HYDRA_SDAT;
+                val |= HYDRA_SDAT_OE;
+        }
+        pdregw(data, val);
+}
+
+static int hydra_bit_getscl(void *data)
+{
+        return (pdregr(data) & HYDRA_SCLK) != 0;
+}
+
+static int hydra_bit_getsda(void *data)
+{
+        return (pdregr(data) & HYDRA_SDAT) != 0;
+}
+
+/* ------------------------------------------------------------------------ */
+
+static struct i2c_algo_bit_data hydra_bit_data = {
+        .setsda         = hydra_bit_setsda,
+        .setscl         = hydra_bit_setscl,
+        .getsda         = hydra_bit_getsda,
+        .getscl         = hydra_bit_getscl,
+        .udelay         = 5,
+        .mdelay         = 5,
+        .timeout        = HZ
+};
+
+static struct i2c_adapter hydra_adap = {
+        .owner          = THIS_MODULE,
+        .name           = "Hydra i2c",
+        .id             = I2C_HW_B_HYDRA,
+        .algo_data      = &hydra_bit_data,
+};
+
+static struct pci_device_id hydra_ids[] = {
+        { PCI_DEVICE(PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_HYDRA) },
+        { 0, }
+};
+
+MODULE_DEVICE_TABLE (pci, hydra_ids);
+
+static int __devinit hydra_probe(struct pci_dev *dev,
+                                 const struct pci_device_id *id)
+{
+        unsigned long base = pci_resource_start(dev, 0);
+        int res;
+
+        if (!request_mem_region(base+offsetof(struct Hydra, CachePD), 4,
+                                hydra_adap.name))
+                return -EBUSY;
+
+        hydra_bit_data.data = ioremap(base, pci_resource_len(dev, 0));
+        if (hydra_bit_data.data == NULL) {
+                release_mem_region(base+offsetof(struct Hydra, CachePD), 4);
+                return -ENODEV;
+        }
+
+        pdregw(hydra_bit_data.data, 0);         /* clear SCLK_OE and SDAT_OE */
+        hydra_adap.dev.parent = &dev->dev;
+        res = i2c_bit_add_bus(&hydra_adap);
+        if (res < 0) {
+                iounmap(hydra_bit_data.data);
+                release_mem_region(base+offsetof(struct Hydra, CachePD), 4);
+                return res;
+        }
+        return 0;
+}
+
+static void __devexit hydra_remove(struct pci_dev *dev)
+{
+        pdregw(hydra_bit_data.data, 0);         /* clear SCLK_OE and SDAT_OE */
+        i2c_bit_del_bus(&hydra_adap);
+        iounmap(hydra_bit_data.data);
+        release_mem_region(pci_resource_start(dev, 0)+
+                           offsetof(struct Hydra, CachePD), 4);
+}
+
+
+static struct pci_driver hydra_driver = {
+        .name           = "hydra_smbus",
+        .id_table       = hydra_ids,
+        .probe          = hydra_probe,
+        .remove         = __devexit_p(hydra_remove),
+};
+
+static int __init i2c_hydra_init(void)
+{
+        return pci_register_driver(&hydra_driver);
+}
+
+
+static void __exit i2c_hydra_exit(void)
+{
+        pci_unregister_driver(&hydra_driver);
+}
+
+
+
+MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
+MODULE_DESCRIPTION("i2c for Apple Hydra Mac I/O");
+MODULE_LICENSE("GPL");
+
+module_init(i2c_hydra_init);
+module_exit(i2c_hydra_exit);
+