From 89d63fe179520b11f54de1f26755b7444c79e73a Mon Sep 17 00:00:00 2001 From: Atsushi Nemoto Date: Fri, 11 Jul 2008 00:33:08 +0900 Subject: [MIPS] TXx9: Reorganize PCI code Split out PCIC dependent code and SoC dependent code from board dependent code. Now TX4927 PCIC code is independent from TX4927/TX4938 SoC code. Also fix some build problems on CONFIG_PCI=n. As a bonus, "FPCIB0 Backplane Support" is available for all TX39/TX49 boards and PCI66 support is available for all TX49 boards. Signed-off-by: Atsushi Nemoto Signed-off-by: Ralf Baechle --- arch/mips/pci/pci-tx4938.c | 134 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) create mode 100644 arch/mips/pci/pci-tx4938.c (limited to 'arch/mips/pci/pci-tx4938.c') diff --git a/arch/mips/pci/pci-tx4938.c b/arch/mips/pci/pci-tx4938.c new file mode 100644 index 000000000000..e5375511c2b7 --- /dev/null +++ b/arch/mips/pci/pci-tx4938.c @@ -0,0 +1,134 @@ +/* + * linux/arch/mips/pci/pci-tx4938.c + * + * Based on linux/arch/mips/txx9/rbtx4938/setup.c, + * and RBTX49xx patch from CELF patch archive. + * + * Copyright 2001, 2003-2005 MontaVista Software Inc. + * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) + * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007 + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include +#include +#include +#include +#include + +int __init tx4938_report_pciclk(void) +{ + int pciclk = 0; + + printk(KERN_INFO "PCIC --%s PCICLK:", + (__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCI66) ? + " PCI66" : ""); + if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_PCICLKEN_ALL) { + u64 ccfg = __raw_readq(&tx4938_ccfgptr->ccfg); + switch ((unsigned long)ccfg & + TX4938_CCFG_PCIDIVMODE_MASK) { + case TX4938_CCFG_PCIDIVMODE_4: + pciclk = txx9_cpu_clock / 4; break; + case TX4938_CCFG_PCIDIVMODE_4_5: + pciclk = txx9_cpu_clock * 2 / 9; break; + case TX4938_CCFG_PCIDIVMODE_5: + pciclk = txx9_cpu_clock / 5; break; + case TX4938_CCFG_PCIDIVMODE_5_5: + pciclk = txx9_cpu_clock * 2 / 11; break; + case TX4938_CCFG_PCIDIVMODE_8: + pciclk = txx9_cpu_clock / 8; break; + case TX4938_CCFG_PCIDIVMODE_9: + pciclk = txx9_cpu_clock / 9; break; + case TX4938_CCFG_PCIDIVMODE_10: + pciclk = txx9_cpu_clock / 10; break; + case TX4938_CCFG_PCIDIVMODE_11: + pciclk = txx9_cpu_clock / 11; break; + } + printk("Internal(%u.%uMHz)", + (pciclk + 50000) / 1000000, + ((pciclk + 50000) / 100000) % 10); + } else { + printk("External"); + pciclk = -1; + } + printk("\n"); + return pciclk; +} + +void __init tx4938_report_pci1clk(void) +{ + __u64 ccfg = __raw_readq(&tx4938_ccfgptr->ccfg); + unsigned int pciclk = + txx9_gbus_clock / ((ccfg & TX4938_CCFG_PCI1DMD) ? 4 : 2); + + printk(KERN_INFO "PCIC1 -- %sPCICLK:%u.%uMHz\n", + (ccfg & TX4938_CCFG_PCI1_66) ? "PCI66 " : "", + (pciclk + 50000) / 1000000, + ((pciclk + 50000) / 100000) % 10); +} + +int __init tx4938_pciclk66_setup(void) +{ + int pciclk; + + /* Assert M66EN */ + tx4938_ccfg_set(TX4938_CCFG_PCI66); + /* Double PCICLK (if possible) */ + if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_PCICLKEN_ALL) { + unsigned int pcidivmode = 0; + u64 ccfg = __raw_readq(&tx4938_ccfgptr->ccfg); + pcidivmode = (unsigned long)ccfg & + TX4938_CCFG_PCIDIVMODE_MASK; + switch (pcidivmode) { + case TX4938_CCFG_PCIDIVMODE_8: + case TX4938_CCFG_PCIDIVMODE_4: + pcidivmode = TX4938_CCFG_PCIDIVMODE_4; + pciclk = txx9_cpu_clock / 4; + break; + case TX4938_CCFG_PCIDIVMODE_9: + case TX4938_CCFG_PCIDIVMODE_4_5: + pcidivmode = TX4938_CCFG_PCIDIVMODE_4_5; + pciclk = txx9_cpu_clock * 2 / 9; + break; + case TX4938_CCFG_PCIDIVMODE_10: + case TX4938_CCFG_PCIDIVMODE_5: + pcidivmode = TX4938_CCFG_PCIDIVMODE_5; + pciclk = txx9_cpu_clock / 5; + break; + case TX4938_CCFG_PCIDIVMODE_11: + case TX4938_CCFG_PCIDIVMODE_5_5: + default: + pcidivmode = TX4938_CCFG_PCIDIVMODE_5_5; + pciclk = txx9_cpu_clock * 2 / 11; + break; + } + tx4938_ccfg_change(TX4938_CCFG_PCIDIVMODE_MASK, + pcidivmode); + printk(KERN_DEBUG "PCICLK: ccfg:%08lx\n", + (unsigned long)__raw_readq(&tx4938_ccfgptr->ccfg)); + } else + pciclk = -1; + return pciclk; +} + +int tx4938_pcic1_map_irq(const struct pci_dev *dev, u8 slot) +{ + if (get_tx4927_pcicptr(dev->bus->sysdata) == tx4938_pcic1ptr) { + switch (slot) { + case TX4927_PCIC_IDSEL_AD_TO_SLOT(31): + if (__raw_readq(&tx4938_ccfgptr->pcfg) & + TX4938_PCFG_ETH0_SEL) + return TXX9_IRQ_BASE + TX4938_IR_ETH0; + break; + case TX4927_PCIC_IDSEL_AD_TO_SLOT(30): + if (__raw_readq(&tx4938_ccfgptr->pcfg) & + TX4938_PCFG_ETH1_SEL) + return TXX9_IRQ_BASE + TX4938_IR_ETH1; + break; + } + return 0; + } + return -1; +} -- cgit v1.2.3