3c0553e734
The index for a device interrupt in the PIC interrupt routing table changes for different chips in the XLP family. Avoid using the fixed entries and derive the index value from the SoC device header. Add workarounds for some devices which do not report the IRT index correctly. Signed-off-by: Jayachandran C <jchandra@broadcom.com> Patchwork: http://patchwork.linux-mips.org/patch/5025/ Acked-by: John Crispin <blogic@openwrt.org>
145 lines
4.2 KiB
C
145 lines
4.2 KiB
C
/*
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* Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
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* reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the NetLogic
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* license below:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include <asm/mipsregs.h>
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#include <asm/time.h>
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#include <asm/netlogic/common.h>
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#include <asm/netlogic/haldefs.h>
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#include <asm/netlogic/xlp-hal/iomap.h>
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#include <asm/netlogic/xlp-hal/xlp.h>
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#include <asm/netlogic/xlp-hal/pic.h>
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#include <asm/netlogic/xlp-hal/sys.h>
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/* Main initialization */
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void nlm_node_init(int node)
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{
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struct nlm_soc_info *nodep;
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nodep = nlm_get_node(node);
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nodep->sysbase = nlm_get_sys_regbase(node);
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nodep->picbase = nlm_get_pic_regbase(node);
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nodep->ebase = read_c0_ebase() & (~((1 << 12) - 1));
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spin_lock_init(&nodep->piclock);
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}
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int nlm_irq_to_irt(int irq)
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{
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uint64_t pcibase;
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int devoff, irt;
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switch (irq) {
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case PIC_UART_0_IRQ:
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devoff = XLP_IO_UART0_OFFSET(0);
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break;
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case PIC_UART_1_IRQ:
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devoff = XLP_IO_UART1_OFFSET(0);
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break;
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case PIC_EHCI_0_IRQ:
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devoff = XLP_IO_USB_EHCI0_OFFSET(0);
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break;
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case PIC_EHCI_1_IRQ:
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devoff = XLP_IO_USB_EHCI1_OFFSET(0);
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break;
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case PIC_OHCI_0_IRQ:
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devoff = XLP_IO_USB_OHCI0_OFFSET(0);
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break;
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case PIC_OHCI_1_IRQ:
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devoff = XLP_IO_USB_OHCI1_OFFSET(0);
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break;
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case PIC_OHCI_2_IRQ:
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devoff = XLP_IO_USB_OHCI2_OFFSET(0);
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break;
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case PIC_OHCI_3_IRQ:
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devoff = XLP_IO_USB_OHCI3_OFFSET(0);
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break;
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case PIC_MMC_IRQ:
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devoff = XLP_IO_SD_OFFSET(0);
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break;
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case PIC_I2C_0_IRQ:
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devoff = XLP_IO_I2C0_OFFSET(0);
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break;
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case PIC_I2C_1_IRQ:
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devoff = XLP_IO_I2C1_OFFSET(0);
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break;
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default:
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devoff = 0;
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break;
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}
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if (devoff != 0) {
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pcibase = nlm_pcicfg_base(devoff);
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irt = nlm_read_reg(pcibase, XLP_PCI_IRTINFO_REG) & 0xffff;
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/* HW bug, I2C 1 irt entry is off by one */
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if (irq == PIC_I2C_1_IRQ)
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irt = irt + 1;
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} else if (irq >= PIC_PCIE_LINK_0_IRQ && irq <= PIC_PCIE_LINK_3_IRQ) {
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/* HW bug, PCI IRT entries are bad on early silicon, fix */
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irt = PIC_IRT_PCIE_LINK_INDEX(irq - PIC_PCIE_LINK_0_IRQ);
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} else {
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irt = -1;
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}
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return irt;
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}
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unsigned int nlm_get_core_frequency(int node, int core)
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{
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unsigned int pll_divf, pll_divr, dfs_div, ext_div;
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unsigned int rstval, dfsval, denom;
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uint64_t num, sysbase;
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sysbase = nlm_get_node(node)->sysbase;
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rstval = nlm_read_sys_reg(sysbase, SYS_POWER_ON_RESET_CFG);
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dfsval = nlm_read_sys_reg(sysbase, SYS_CORE_DFS_DIV_VALUE);
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pll_divf = ((rstval >> 10) & 0x7f) + 1;
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pll_divr = ((rstval >> 8) & 0x3) + 1;
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ext_div = ((rstval >> 30) & 0x3) + 1;
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dfs_div = ((dfsval >> (core * 4)) & 0xf) + 1;
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num = 800000000ULL * pll_divf;
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denom = 3 * pll_divr * ext_div * dfs_div;
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do_div(num, denom);
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return (unsigned int)num;
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}
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unsigned int nlm_get_cpu_frequency(void)
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{
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return nlm_get_core_frequency(0, 0);
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}
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