11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds i2c Support for the Apple `Hydra' Mac I/O 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Copyright (c) 1999-2004 Geert Uytterhoeven <geert@linux-m68k.org> 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Based on i2c Support for Via Technologies 82C586B South Bridge 796de0e252cedffad61b3cb5e05662c591898e69aJan Engelhardt Copyright (c) 1998, 1999 Kyösti Mälkki <kmalkki@cc.hut.fi> 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds This program is free software; you can redistribute it and/or modify 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds it under the terms of the GNU General Public License as published by 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the Free Software Foundation; either version 2 of the License, or 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds (at your option) any later version. 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds This program is distributed in the hope that it will be useful, 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds but WITHOUT ANY WARRANTY; without even the implied warranty of 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds GNU General Public License for more details. 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds You should have received a copy of the GNU General Public License 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds along with this program; if not, write to the Free Software 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/kernel.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/pci.h> 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/i2c.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/i2c-algo-bit.h> 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 312178218027e4da0608219fae1d02e5c88f4e560dH Hartley Sweeten#include <linux/io.h> 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/hydra.h> 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HYDRA_CPD_PD0 0x00000001 /* CachePD lines */ 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HYDRA_CPD_PD1 0x00000002 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HYDRA_CPD_PD2 0x00000004 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HYDRA_CPD_PD3 0x00000008 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HYDRA_SCLK HYDRA_CPD_PD0 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HYDRA_SDAT HYDRA_CPD_PD1 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HYDRA_SCLK_OE 0x00000010 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HYDRA_SDAT_OE 0x00000020 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline void pdregw(void *data, u32 val) 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Hydra *hydra = (struct Hydra *)data; 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds writel(val, &hydra->CachePD); 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic inline u32 pdregr(void *data) 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct Hydra *hydra = (struct Hydra *)data; 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return readl(&hydra->CachePD); 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hydra_bit_setscl(void *data, int state) 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 val = pdregr(data); 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (state) 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val &= ~HYDRA_SCLK_OE; 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val &= ~HYDRA_SCLK; 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= HYDRA_SCLK_OE; 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pdregw(data, val); 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void hydra_bit_setsda(void *data, int state) 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds u32 val = pdregr(data); 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (state) 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val &= ~HYDRA_SDAT_OE; 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds else { 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val &= ~HYDRA_SDAT; 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds val |= HYDRA_SDAT_OE; 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pdregw(data, val); 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 811da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hydra_bit_getscl(void *data) 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (pdregr(data) & HYDRA_SCLK) != 0; 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int hydra_bit_getsda(void *data) 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return (pdregr(data) & HYDRA_SDAT) != 0; 891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* ------------------------------------------------------------------------ */ 921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct i2c_algo_bit_data hydra_bit_data = { 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .setsda = hydra_bit_setsda, 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .setscl = hydra_bit_setscl, 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .getsda = hydra_bit_getsda, 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .getscl = hydra_bit_getscl, 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .udelay = 5, 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .timeout = HZ 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct i2c_adapter hydra_adap = { 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .owner = THIS_MODULE, 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "Hydra i2c", 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .algo_data = &hydra_bit_data, 1061da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1083527bd5045aacb4e4072f9cacb8eb9a433fbad39Axel Linstatic DEFINE_PCI_DEVICE_TABLE(hydra_ids) = { 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { PCI_DEVICE(PCI_VENDOR_ID_APPLE, PCI_DEVICE_ID_APPLE_HYDRA) }, 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds { 0, } 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DEVICE_TABLE (pci, hydra_ids); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __devinit hydra_probe(struct pci_dev *dev, 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds const struct pci_device_id *id) 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long base = pci_resource_start(dev, 0); 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int res; 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!request_mem_region(base+offsetof(struct Hydra, CachePD), 4, 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hydra_adap.name)) 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -EBUSY; 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 125c7a5f22d1f15a03d0bfed5b1795e3172b6309d86Arjan van de Ven hydra_bit_data.data = pci_ioremap_bar(dev, 0); 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (hydra_bit_data.data == NULL) { 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds release_mem_region(base+offsetof(struct Hydra, CachePD), 4); 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return -ENODEV; 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pdregw(hydra_bit_data.data, 0); /* clear SCLK_OE and SDAT_OE */ 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds hydra_adap.dev.parent = &dev->dev; 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds res = i2c_bit_add_bus(&hydra_adap); 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (res < 0) { 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iounmap(hydra_bit_data.data); 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds release_mem_region(base+offsetof(struct Hydra, CachePD), 4); 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return res; 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 1401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __devexit hydra_remove(struct pci_dev *dev) 1431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pdregw(hydra_bit_data.data, 0); /* clear SCLK_OE and SDAT_OE */ 1453269711b76ba27b78862c48398b0d313ccaa99c2Jean Delvare i2c_del_adapter(&hydra_adap); 1461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iounmap(hydra_bit_data.data); 1471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds release_mem_region(pci_resource_start(dev, 0)+ 1481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds offsetof(struct Hydra, CachePD), 4); 1491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct pci_driver hydra_driver = { 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .name = "hydra_smbus", 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .id_table = hydra_ids, 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .probe = hydra_probe, 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds .remove = __devexit_p(hydra_remove), 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init i2c_hydra_init(void) 1601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return pci_register_driver(&hydra_driver); 1621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __exit i2c_hydra_exit(void) 1661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds pci_unregister_driver(&hydra_driver); 1681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>"); 1731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_DESCRIPTION("i2c for Apple Hydra Mac I/O"); 1741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsMODULE_LICENSE("GPL"); 1751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_init(i2c_hydra_init); 1771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsmodule_exit(i2c_hydra_exit); 1781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 179