/* * m7101.c * * Initialize the M7101 device on ALi M15x3 Chipsets */ /* Copyright (c) 2000 Burkhard Kohl , Frank Bauer , and Mark D. Studebaker 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. */ /* CHANGES: * 030799 FB: created this file * frank.bauer@nikocity.de * * 110799 BK: messed it up to insert the M7101 dev after boot * buk@buks.ipn.de * * 160799 BK: grouped portions of the code into functions * * June 21, 2000 MDS: Add Copyright and GPL comments, * distribute as release 0.1. * * Sept 21, 2000 MDS: Rewrite to use kernel hotplug facility, * (similar to drivers/pcmcia/cardbus.c), * fix makefile so it will compile, * distribute as release 0.2. * * This code is absolutely experimental - use it at your own * risk. * * Warning, this module will work only with 2.4.x kernels. * If it works with earlier kernels then it is by luck. * * Warning, this module does not work with egcs < 2.95.2, use * gcc > 2.7.2 or egcs >= 2.95.2. * */ #ifdef M7101_DEBUG #define DBG(x...) printk(x) #else #define DBG(x...) #endif #ifndef TRUE #define TRUE 1 #define FALSE !TRUE #endif #include #ifndef CONFIG_HOTPLUG #error ERROR - You must have 'Support for hot-pluggable devices' enabled in your kernel (under 'general setup')!! #endif /* Deal with CONFIG_MODVERSIONS */ #ifdef CONFIG_MODVERSIONS #define MODVERSIONS #include #endif #include #include #include #include #include #include #include #include /* from lm_sensors-2.3.3: */ #define SMBHSTCFG 0x0E0 /* PCI Address Constants */ #define SMBATPC 0x05B /* used to unlock xxxBA registers */ /* ALI15X3 address lock bits */ #define ALI15X3_LOCK 0x06 /* addresses the i/o space gets mapped to, for M1543C, Bits 16-31 are supposed to be zero */ #define ACPI_IO_SIZE 0x40 #define SMB_IO_SIZE 0x20 #define ACPI_BASE 0x0 #define SMB_BASE 0x1 static u32 acpi_io = 0xEC00; /* Set I/O Base defaults here */ static u32 smb_io = 0xE800; MODULE_PARM(acpi_io, "l"); MODULE_PARM(smb_io, "l"); #ifdef M7101_DEBUG static int debug = 0; MODULE_PARM(debug, "i"); #endif /* status, used to indicate that io space needs to be freed */ static struct pci_dev *m7101 = NULL; static int m7101_inserted = FALSE; extern void cleanup_module(); static rwlock_t m7101_lock = RW_LOCK_UNLOCKED; static unsigned long m7101_lock_flags = 0; #ifdef M7101_DEBUG static void dump_dev_data(struct pci_dev *dev, int address_data) { if (dev != NULL) { printk("m7101: devfn: 0x%4x class: 0x%4x\n", dev->devfn, dev->class); printk("m7101: vendor: 0x%4x device: 0x%4x\n", dev->vendor, dev->device); if (address_data) { printk("m7101: resource[0]: 0x%08lx resource[1]: 0x%08lx\n", dev->resource[0].start, dev->resource[1].start); printk("m7101: resource[2]: 0x%08lx resource[3]: 0x%08lx\n", dev->resource[2].start, dev->resource[3].start); printk("m7101: resource[4]: 0x%08lx resource[5]: 0x%08lx\n", dev->resource[4].start, dev->resource[5].start); printk("m7101: rom_address: 0x%08lx \n", dev->resource[PCI_ROM_RESOURCE].start); } } } #endif /* * Checks whether PMU and SMB are enabled and turns them on in case they are not. * It's done by clearing Bit 2 in M1533 config space 5Fh. * I/O */ static int m7101_enable(struct pci_dev *dev){ u8 val = 0; pci_read_config_byte(dev, 0x5F, &val); DBG("m7101: M7101 config byte reading 0x%X.\n", val); if (val & 0x4) { pci_write_config_byte(dev, 0x5F, val & 0xFB); pci_read_config_byte(dev, 0x5F, &val); if(val & 0x4) { DBG("m7101: Can't enable PMU/SMB, config byte locked:-(\n"); return -EIO; } } return 0; } /* * Builds the basic pci_dev for the M7101 */ static int m7101_build(struct pci_dev **m7101, struct pci_bus *bus) { u32 devfn; u16 id = 0; u16 vid = 0; int ret; DBG("m7101: requesting kernel space for the m7101 entry.\n"); *m7101 = kmalloc(sizeof(**m7101), GFP_ATOMIC); if(NULL == *m7101) { printk("m7101: out of memory.\n"); return -ENOMEM; } /* minimally fill in structure for search */ /* The device should be on the same bus as the M1533. */ memset(*m7101, 0, sizeof(**m7101)); (*m7101)->bus = bus; (*m7101)->sysdata = bus->sysdata; (*m7101)->hdr_type = PCI_HEADER_TYPE_NORMAL; DBG("m7101: now looking for M7101.\n"); for (id = 0, devfn = 0; devfn < 0xFF; devfn++) { (*m7101)->devfn = devfn; ret = pci_read_config_word(*m7101, PCI_DEVICE_ID, &id); if (ret == 0 && PCI_DEVICE_ID_AL_M7101 == id) { pci_read_config_word(*m7101, PCI_VENDOR_ID, &vid); if(vid == PCI_VENDOR_ID_AL) break; } } if (PCI_DEVICE_ID_AL_M7101 != id) { DBG("m7101: M7101 not found although M1533 present - strange.\n"); return -EACCES; } else { DBG("m7101: M7101 found and enabled. Devfn: 0x%X.\n", devfn); } /* We now have the devfn and bus of the M7101 device. * let's put the rest of the device data together. */ (*m7101)->vendor = PCI_VENDOR_ID_AL; (*m7101)->hdr_type = PCI_HEADER_TYPE_NORMAL; (*m7101)->device = PCI_DEVICE_ID_AL_M7101; return(pci_setup_device(*m7101)); } /* * unlock the address registers if necessary */ static int m7101_unlock_registers(struct pci_dev *m7101) { u8 val = 0; if (pci_read_config_byte(m7101, SMBATPC, &val)) { DBG("m7101: failed to read SMBATPC\n"); return -EIO; } else { if(val & ALI15X3_LOCK) { DBG("m7101: need to unlock the address registers\n"); val &= ~ALI15X3_LOCK; if (pci_write_config_byte(m7101, SMBATPC, val)) { DBG("m7101: failed to write SMBATPC\n"); return -EIO; } } } return 0; } static int m7101_set_io_address(struct pci_dev *m7101, u32 addr, int base_idx, int size) { if (!addr) { printk("m7101: Sorry - cannot assign address 0 to region.\n"); return -EINVAL; } if (check_region(addr, size)) { printk("m7101: Requested IO-region 0x%x already in use.\n", addr); return -EBUSY; } else { m7101->resource[base_idx].start = addr; } return 0; } /* Initialize the module */ int init_module(void) { struct pci_bus *bus = NULL; struct pci_dev *dev = NULL; u32 acpi_addr = 0, smb_addr = 0; int ret = 0; DBG("m7101: init_module().\n"); /* Are we on a PCI-Board? */ if (!pci_present()) { printk("m7101: No PCI bus found - sorry.\n"); return -ENODEV; } /* We want to be sure that the M7101 is not present yet. */ dev = pci_find_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, NULL); if (dev) { printk("m7101: M7101 already present, no need to run this module.\n"); #ifdef M7101_DEBUG if(debug) { printk("m7101: removing device for testing\n"); pci_remove_device(dev); m7101_inserted = 0; return 0; } else #endif return -EPERM; } /* Are we operating a M15x3 chipset */ dev = pci_find_device(PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M1533, NULL); if (NULL == dev) { printk("m7101: ALi M15xx chipset not found.\n"); return -ENODEV ; } /* we need the bus pointer later */ bus = dev->bus; if ( (ret = m7101_enable(dev)) ) { printk("m7101: Unable to turn on M7101 device - sorry!\n"); return ret; } if ( (ret = m7101_build(&m7101, bus)) ){ return ret; } /* thus, now we have a rudimentary dev for M7101 ... */ /* check wether register need to be unlocked. */ if ( (ret = m7101_unlock_registers(m7101)) ){ return ret; } /* * Handle address assignment for ACPI_IO * If address is already assigned do nothing. */ acpi_addr = m7101->resource[ACPI_BASE].start; if (!acpi_addr) { acpi_io |= PCI_BASE_ADDRESS_SPACE_IO; ret = m7101_set_io_address(m7101, acpi_io,ACPI_BASE, ACPI_IO_SIZE); if (ret) return ret; acpi_addr = acpi_io; } /* * Handle address assignment for SMB_IO * If address is already assigned then do nothing. */ smb_addr = m7101->resource[SMB_BASE].start; if (!smb_addr) { smb_io |= PCI_BASE_ADDRESS_SPACE_IO; ret = m7101_set_io_address(m7101, smb_io, SMB_BASE, SMB_IO_SIZE); if (ret) return ret; smb_addr = smb_io; } #ifdef M7101_DEBUG dump_dev_data(m7101, 1); #endif if ( (ret = pci_enable_device(m7101)) ) { printk("m7101: Unable to pci_enable M7101 device!\n"); return ret; } DBG("m7101: now inserting.\n"); pci_insert_device(m7101, m7101->bus); printk("m7101: Enabled with ACPI I/O address 0x%04X and SMB I/O address 0x%04X\n", acpi_addr, smb_addr); m7101_inserted = TRUE; return 0; } void cleanup_module() { write_lock_irqsave(m7101_lock, m7101_lock_flags); if (m7101_inserted) { pci_remove_device(m7101); m7101_inserted = FALSE; } write_unlock_irqrestore(m7101_lock, m7101_lock_flags); if (NULL != m7101) kfree(m7101); printk("m7101: bye bye\n"); } EXPORT_NO_SYMBOLS; #ifdef MODULE #ifdef MODULE_LICENSE MODULE_LICENSE("GPL"); #endif MODULE_AUTHOR("Burkhard Kohl , " "Frank Bauer , " "and Mark Studebaker "); MODULE_DESCRIPTION("M7101 PCI Inserter"); #endif /* MODULE */