diff options
Diffstat (limited to 'arch/mips/pci/ops-pnx8550.c')
| -rw-r--r-- | arch/mips/pci/ops-pnx8550.c | 282 |
1 files changed, 0 insertions, 282 deletions
diff --git a/arch/mips/pci/ops-pnx8550.c b/arch/mips/pci/ops-pnx8550.c deleted file mode 100644 index 1e6213fa7bd..00000000000 --- a/arch/mips/pci/ops-pnx8550.c +++ /dev/null @@ -1,282 +0,0 @@ -/* - * - * BRIEF MODULE DESCRIPTION - * - * 2.6 port, Embedded Alley Solutions, Inc - * - * Based on: - * Author: source@mvista.com - * - * This program is free software; you can distribute it and/or modify it - * under the terms of the GNU General Public License (Version 2) as - * published by the Free Software Foundation. - * - * This program is distributed in the hope 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., - * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. - */ -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/vmalloc.h> -#include <linux/delay.h> - -#include <asm/mach-pnx8550/pci.h> -#include <asm/mach-pnx8550/glb.h> - -static inline void clear_status(void) -{ - unsigned long pci_stat; - - pci_stat = inl(PCI_BASE | PCI_GPPM_STATUS); - outl(pci_stat, PCI_BASE | PCI_GPPM_ICLR); -} - -static inline unsigned int -calc_cfg_addr(struct pci_bus *bus, unsigned int devfn, int where) -{ - unsigned int addr; - - addr = ((bus->number > 0) ? (((bus->number & 0xff) << PCI_CFG_BUS_SHIFT) | 1) : 0); - addr |= ((devfn & 0xff) << PCI_CFG_FUNC_SHIFT) | (where & 0xfc); - - return addr; -} - -static int -config_access(unsigned int pci_cmd, struct pci_bus *bus, unsigned int devfn, int where, unsigned int pci_mode, unsigned int *val) -{ - unsigned int flags; - unsigned long loops = 0; - unsigned long ioaddr = calc_cfg_addr(bus, devfn, where); - - local_irq_save(flags); - /*Clear pending interrupt status */ - if (inl(PCI_BASE | PCI_GPPM_STATUS)) { - clear_status(); - while (!(inl(PCI_BASE | PCI_GPPM_STATUS) == 0)) ; - } - - outl(ioaddr, PCI_BASE | PCI_GPPM_ADDR); - - if ((pci_cmd == PCI_CMD_IOW) || (pci_cmd == PCI_CMD_CONFIG_WRITE)) - outl(*val, PCI_BASE | PCI_GPPM_WDAT); - - outl(INIT_PCI_CYCLE | pci_cmd | (pci_mode & PCI_BYTE_ENABLE_MASK), - PCI_BASE | PCI_GPPM_CTRL); - - loops = - ((loops_per_jiffy * - PCI_IO_JIFFIES_TIMEOUT) >> (PCI_IO_JIFFIES_SHIFT)); - while (1) { - if (inl(PCI_BASE | PCI_GPPM_STATUS) & GPPM_DONE) { - if ((pci_cmd == PCI_CMD_IOR) || - (pci_cmd == PCI_CMD_CONFIG_READ)) - *val = inl(PCI_BASE | PCI_GPPM_RDAT); - clear_status(); - local_irq_restore(flags); - return PCIBIOS_SUCCESSFUL; - } else if (inl(PCI_BASE | PCI_GPPM_STATUS) & GPPM_R_MABORT) { - break; - } - - loops--; - if (loops == 0) { - printk("%s : Arbiter Locked.\n", __func__); - } - } - - clear_status(); - if ((pci_cmd == PCI_CMD_IOR) || (pci_cmd == PCI_CMD_IOW)) { - printk("%s timeout (GPPM_CTRL=%X) ioaddr %lX pci_cmd %X\n", - __func__, inl(PCI_BASE | PCI_GPPM_CTRL), ioaddr, - pci_cmd); - } - - if ((pci_cmd == PCI_CMD_IOR) || (pci_cmd == PCI_CMD_CONFIG_READ)) - *val = 0xffffffff; - local_irq_restore(flags); - return PCIBIOS_DEVICE_NOT_FOUND; -} - -/* - * We can't address 8 and 16 bit words directly. Instead we have to - * read/write a 32bit word and mask/modify the data we actually want. - */ -static int -read_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 * val) -{ - unsigned int data = 0; - int err; - - if (bus == NULL) - return -1; - - err = config_access(PCI_CMD_CONFIG_READ, bus, devfn, where, ~(1 << (where & 3)), &data); - switch (where & 0x03) { - case 0: - *val = (unsigned char)(data & 0x000000ff); - break; - case 1: - *val = (unsigned char)((data & 0x0000ff00) >> 8); - break; - case 2: - *val = (unsigned char)((data & 0x00ff0000) >> 16); - break; - case 3: - *val = (unsigned char)((data & 0xff000000) >> 24); - break; - } - - return err; -} - -static int -read_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 * val) -{ - unsigned int data = 0; - int err; - - if (bus == NULL) - return -1; - - if (where & 0x01) - return PCIBIOS_BAD_REGISTER_NUMBER; - - err = config_access(PCI_CMD_CONFIG_READ, bus, devfn, where, ~(3 << (where & 3)), &data); - switch (where & 0x02) { - case 0: - *val = (unsigned short)(data & 0x0000ffff); - break; - case 2: - *val = (unsigned short)((data & 0xffff0000) >> 16); - break; - } - - return err; -} - -static int -read_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 * val) -{ - int err; - if (bus == NULL) - return -1; - - if (where & 0x03) - return PCIBIOS_BAD_REGISTER_NUMBER; - - err = config_access(PCI_CMD_CONFIG_READ, bus, devfn, where, 0, val); - - return err; -} - -static int -write_config_byte(struct pci_bus *bus, unsigned int devfn, int where, u8 val) -{ - unsigned int data = (unsigned int)val; - int err; - - if (bus == NULL) - return -1; - - switch (where & 0x03) { - case 1: - data = (data << 8); - break; - case 2: - data = (data << 16); - break; - case 3: - data = (data << 24); - break; - default: - break; - } - - err = config_access(PCI_CMD_CONFIG_WRITE, bus, devfn, where, ~(1 << (where & 3)), &data); - - return err; -} - -static int -write_config_word(struct pci_bus *bus, unsigned int devfn, int where, u16 val) -{ - unsigned int data = (unsigned int)val; - int err; - - if (bus == NULL) - return -1; - - if (where & 0x01) - return PCIBIOS_BAD_REGISTER_NUMBER; - - switch (where & 0x02) { - case 2: - data = (data << 16); - break; - default: - break; - } - err = config_access(PCI_CMD_CONFIG_WRITE, bus, devfn, where, ~(3 << (where & 3)), &data); - - return err; -} - -static int -write_config_dword(struct pci_bus *bus, unsigned int devfn, int where, u32 val) -{ - int err; - if (bus == NULL) - return -1; - - if (where & 0x03) - return PCIBIOS_BAD_REGISTER_NUMBER; - - err = config_access(PCI_CMD_CONFIG_WRITE, bus, devfn, where, 0, &val); - - return err; -} - -static int config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 * val) -{ - switch (size) { - case 1: { - u8 _val; - int rc = read_config_byte(bus, devfn, where, &_val); - *val = _val; - return rc; - } - case 2: { - u16 _val; - int rc = read_config_word(bus, devfn, where, &_val); - *val = _val; - return rc; - } - default: - return read_config_dword(bus, devfn, where, val); - } -} - -static int config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val) -{ - switch (size) { - case 1: - return write_config_byte(bus, devfn, where, (u8) val); - case 2: - return write_config_word(bus, devfn, where, (u16) val); - default: - return write_config_dword(bus, devfn, where, val); - } -} - -struct pci_ops pnx8550_pci_ops = { - config_read, - config_write -}; |