diff options
Diffstat (limited to 'arch/mips/pci/ops-tx3927.c')
| -rw-r--r-- | arch/mips/pci/ops-tx3927.c | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/arch/mips/pci/ops-tx3927.c b/arch/mips/pci/ops-tx3927.c new file mode 100644 index 000000000000..0e0daadc303d --- /dev/null +++ b/arch/mips/pci/ops-tx3927.c @@ -0,0 +1,391 @@ +/* + * Copyright 2001 MontaVista Software Inc. + * Author: MontaVista Software, Inc. + * ahennessy@mvista.com + * + * Copyright (C) 2000-2001 Toshiba Corporation + * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) + * + * Based on arch/mips/ddb5xxx/ddb5477/pci_ops.c + * + * Define the pci_ops for JMR3927. + * + * Much of the code is derived from the original DDB5074 port by + * Geert Uytterhoeven <geert@sonycom.com> + * + * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * 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/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/init.h> + +#include <asm/addrspace.h> +#include <asm/jmr3927/jmr3927.h> +#include <asm/debug.h> + +static inline int mkaddr(unsigned char bus, unsigned char dev_fn, + unsigned char where) +{ + if (bus == 0 && dev_fn >= PCI_DEVFN(TX3927_PCIC_MAX_DEVNU, 0)) + return PCIBIOS_DEVICE_NOT_FOUND; + + tx3927_pcicptr->ica = ((bus & 0xff) << 0x10) | + ((dev_fn & 0xff) << 0x08) | + (where & 0xfc); + + /* clear M_ABORT and Disable M_ABORT Int. */ + tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT; + tx3927_pcicptr->pcistatim &= ~PCI_STATUS_REC_MASTER_ABORT; + + return PCIBIOS_SUCCESSFUL; +} + +static inline int check_abort(void) +{ + if (tx3927_pcicptr->pcistat & PCI_STATUS_REC_MASTER_ABORT) + tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT; + tx3927_pcicptr->pcistatim |= PCI_STATUS_REC_MASTER_ABORT; + return PCIBIOS_DEVICE_NOT_FOUND; + + return PCIBIOS_SUCCESSFUL; +} + +static int jmr3927_pci_read_config(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 * val) +{ + int ret, busno; + + /* check if the bus is top-level */ + if (bus->parent != NULL) + busno = bus->number; + + ret = mkaddr(busno, devfn, where); + if (ret) + return ret; + + switch (size) { + case 1: + *val = *(volatile u8 *) ((unsigned long) & tx3927_pcicptr->icd | (where & 3)); + break; + + case 2: + *val = le16_to_cpu(*(volatile u16 *) ((unsigned long) & tx3927_pcicptr->icd | (where & 3))); + break; + + case 4: + *val = le32_to_cpu(tx3927_pcicptr->icd); + break; + } + + return check_abort(); +} + +static int jmr3927_pci_write_config(struct pci_bus *bus, unsigned int devfn, + int where, int size, u32 val) +{ + int ret, busno; + + /* check if the bus is top-level */ + if (bus->parent != NULL) + bus = bus->number; + else + bus = 0; + + ret = mkaddr(busno, devfn, where); + if (ret) + return ret; + + switch (size) { + case 1: + *(volatile u8 *) ((unsigned long) & tx3927_pcicptr->icd | (where & 3)) = val; + break; + + case 2: + *(volatile u16 *) (unsigned longulong) & tx3927_pcicptr->icd | (where & 2)) = + cpu_to_le16(val); + break; + + case 4: + tx3927_pcicptr->icd = cpu_to_le32(val); + } + + if (tx3927_pcicptr->pcistat & PCI_STATUS_REC_MASTER_ABORT) + tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT; + tx3927_pcicptr->pcistatim |= PCI_STATUS_REC_MASTER_ABORT; + return PCIBIOS_DEVICE_NOT_FOUND; + + return check_abort(); +} + +struct pci_ops jmr3927_pci_ops = { + jmr3927_pcibios_read_config, + jmr3927_pcibios_write_config, +}; + + +#ifndef JMR3927_INIT_INDIRECT_PCI + +inline unsigned long tc_readl(volatile __u32 * addr) +{ + return readl(addr); +} + +inline void tc_writel(unsigned long data, volatile __u32 * addr) +{ + writel(data, addr); +} +#else + +unsigned long tc_readl(volatile __u32 * addr) +{ + unsigned long val; + + addr = PHYSADDR(addr); + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipciaddr = + (unsigned long) addr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcibe = + (PCI_IPCIBE_ICMD_MEMREAD << PCI_IPCIBE_ICMD_SHIFT) | + PCI_IPCIBE_IBE_LONG; + while (!(tx3927_pcicptr->istat & PCI_ISTAT_IDICC)); + val = + le32_to_cpu(*(volatile u32 *) (ulong) & tx3927_pcicptr-> + ipcidata); + /* clear by setting */ + tx3927_pcicptr->istat |= PCI_ISTAT_IDICC; + return val; +} + +void tc_writel(unsigned long data, volatile __u32 * addr) +{ + addr = PHYSADDR(addr); + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcidata = + cpu_to_le32(data); + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipciaddr = + (unsigned long) addr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcibe = + (PCI_IPCIBE_ICMD_MEMWRITE << PCI_IPCIBE_ICMD_SHIFT) | + PCI_IPCIBE_IBE_LONG; + while (!(tx3927_pcicptr->istat & PCI_ISTAT_IDICC)); + /* clear by setting */ + tx3927_pcicptr->istat |= PCI_ISTAT_IDICC; +} + +unsigned char tx_ioinb(unsigned char *addr) +{ + unsigned long val; + __u32 ioaddr; + int offset; + int byte; + + ioaddr = (unsigned long) addr; + offset = ioaddr & 0x3; + if (offset == 0) + byte = 0x7; + else if (offset == 1) + byte = 0xb; + else if (offset == 2) + byte = 0xd; + else if (offset == 3) + byte = 0xe; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipciaddr = + (unsigned long) ioaddr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcibe = + (PCI_IPCIBE_ICMD_IOREAD << PCI_IPCIBE_ICMD_SHIFT) | byte; + while (!(tx3927_pcicptr->istat & PCI_ISTAT_IDICC)); + val = + le32_to_cpu(*(volatile u32 *) (ulong) & tx3927_pcicptr-> + ipcidata); + val = val & 0xff; + /* clear by setting */ + tx3927_pcicptr->istat |= PCI_ISTAT_IDICC; + return val; +} + +void tx_iooutb(unsigned long data, unsigned char *addr) +{ + __u32 ioaddr; + int offset; + int byte; + + data = data | (data << 8) | (data << 16) | (data << 24); + ioaddr = (unsigned long) addr; + offset = ioaddr & 0x3; + if (offset == 0) + byte = 0x7; + else if (offset == 1) + byte = 0xb; + else if (offset == 2) + byte = 0xd; + else if (offset == 3) + byte = 0xe; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcidata = data; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipciaddr = + (unsigned long) ioaddr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcibe = + (PCI_IPCIBE_ICMD_IOWRITE << PCI_IPCIBE_ICMD_SHIFT) | byte; + while (!(tx3927_pcicptr->istat & PCI_ISTAT_IDICC)); + /* clear by setting */ + tx3927_pcicptr->istat |= PCI_ISTAT_IDICC; +} + +unsigned short tx_ioinw(unsigned short *addr) +{ + unsigned long val; + __u32 ioaddr; + int offset; + int byte; + + ioaddr = (unsigned long) addr; + offset = ioaddr & 0x3; + if (offset == 0) + byte = 0x3; + else if (offset == 2) + byte = 0xc; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipciaddr = + (unsigned long) ioaddr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcibe = + (PCI_IPCIBE_ICMD_IOREAD << PCI_IPCIBE_ICMD_SHIFT) | byte; + while (!(tx3927_pcicptr->istat & PCI_ISTAT_IDICC)); + val = + le32_to_cpu(*(volatile u32 *) (ulong) & tx3927_pcicptr-> + ipcidata); + val = val & 0xffff; + /* clear by setting */ + tx3927_pcicptr->istat |= PCI_ISTAT_IDICC; + return val; + +} + +void tx_iooutw(unsigned long data, unsigned short *addr) +{ + __u32 ioaddr; + int offset; + int byte; + + data = data | (data << 16); + ioaddr = (unsigned long) addr; + offset = ioaddr & 0x3; + if (offset == 0) + byte = 0x3; + else if (offset == 2) + byte = 0xc; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcidata = data; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipciaddr = + (unsigned long) ioaddr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcibe = + (PCI_IPCIBE_ICMD_IOWRITE << PCI_IPCIBE_ICMD_SHIFT) | byte; + while (!(tx3927_pcicptr->istat & PCI_ISTAT_IDICC)); + /* clear by setting */ + tx3927_pcicptr->istat |= PCI_ISTAT_IDICC; +} + +unsigned long tx_ioinl(unsigned int *addr) +{ + unsigned long val; + __u32 ioaddr; + + ioaddr = (unsigned long) addr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipciaddr = + (unsigned long) ioaddr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcibe = + (PCI_IPCIBE_ICMD_IOREAD << PCI_IPCIBE_ICMD_SHIFT) | + PCI_IPCIBE_IBE_LONG; + while (!(tx3927_pcicptr->istat & PCI_ISTAT_IDICC)); + val = + le32_to_cpu(*(volatile u32 *) (ulong) & tx3927_pcicptr-> + ipcidata); + /* clear by setting */ + tx3927_pcicptr->istat |= PCI_ISTAT_IDICC; + return val; +} + +void tx_iooutl(unsigned long data, unsigned int *addr) +{ + __u32 ioaddr; + + ioaddr = (unsigned long) addr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcidata = + cpu_to_le32(data); + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipciaddr = + (unsigned long) ioaddr; + *(volatile u32 *) (ulong) & tx3927_pcicptr->ipcibe = + (PCI_IPCIBE_ICMD_IOWRITE << PCI_IPCIBE_ICMD_SHIFT) | + PCI_IPCIBE_IBE_LONG; + while (!(tx3927_pcicptr->istat & PCI_ISTAT_IDICC)); + /* clear by setting */ + tx3927_pcicptr->istat |= PCI_ISTAT_IDICC; +} + +void tx_insbyte(unsigned char *addr, void *buffer, unsigned int count) +{ + unsigned char *ptr = (unsigned char *) buffer; + + while (count--) { + *ptr++ = tx_ioinb(addr); + } +} + +void tx_insword(unsigned short *addr, void *buffer, unsigned int count) +{ + unsigned short *ptr = (unsigned short *) buffer; + + while (count--) { + *ptr++ = tx_ioinw(addr); + } +} + +void tx_inslong(unsigned int *addr, void *buffer, unsigned int count) +{ + unsigned long *ptr = (unsigned long *) buffer; + + while (count--) { + *ptr++ = tx_ioinl(addr); + } +} + +void tx_outsbyte(unsigned char *addr, void *buffer, unsigned int count) +{ + unsigned char *ptr = (unsigned char *) buffer; + + while (count--) { + tx_iooutb(*ptr++, addr); + } +} + +void tx_outsword(unsigned short *addr, void *buffer, unsigned int count) +{ + unsigned short *ptr = (unsigned short *) buffer; + + while (count--) { + tx_iooutw(*ptr++, addr); + } +} + +void tx_outslong(unsigned int *addr, void *buffer, unsigned int count) +{ + unsigned long *ptr = (unsigned long *) buffer; + + while (count--) { + tx_iooutl(*ptr++, addr); + } +} +#endif |