| Jayachandran C | 65040e2 | 2011-11-16 00:21:28 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights |
| 3 | * reserved. |
| 4 | * |
| 5 | * This software is available to you under a choice of one of two |
| 6 | * licenses. You may choose to be licensed under the terms of the GNU |
| 7 | * General Public License (GPL) Version 2, available from the file |
| 8 | * COPYING in the main directory of this source tree, or the NetLogic |
| 9 | * license below: |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * |
| 15 | * 1. Redistributions of source code must retain the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer. |
| 17 | * 2. Redistributions in binary form must reproduce the above copyright |
| 18 | * notice, this list of conditions and the following disclaimer in |
| 19 | * the documentation and/or other materials provided with the |
| 20 | * distribution. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR |
| 23 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 24 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 27 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 28 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 29 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 30 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| 31 | * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| 32 | * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 33 | */ |
| 34 | |
| 35 | #include <linux/types.h> |
| 36 | #include <linux/kernel.h> |
| 37 | #include <linux/mm.h> |
| 38 | #include <linux/delay.h> |
| 39 | |
| 40 | #include <asm/mipsregs.h> |
| 41 | #include <asm/time.h> |
| 42 | |
| 43 | #include <asm/netlogic/haldefs.h> |
| 44 | #include <asm/netlogic/xlp-hal/iomap.h> |
| 45 | #include <asm/netlogic/xlp-hal/xlp.h> |
| 46 | #include <asm/netlogic/xlp-hal/pic.h> |
| 47 | #include <asm/netlogic/xlp-hal/sys.h> |
| 48 | |
| 49 | /* These addresses are computed by the nlm_hal_init() */ |
| 50 | uint64_t nlm_io_base; |
| 51 | uint64_t nlm_sys_base; |
| 52 | uint64_t nlm_pic_base; |
| 53 | |
| 54 | /* Main initialization */ |
| 55 | void nlm_hal_init(void) |
| 56 | { |
| 57 | nlm_io_base = CKSEG1ADDR(XLP_DEFAULT_IO_BASE); |
| 58 | nlm_sys_base = nlm_get_sys_regbase(0); /* node 0 */ |
| 59 | nlm_pic_base = nlm_get_pic_regbase(0); /* node 0 */ |
| 60 | } |
| 61 | |
| 62 | int nlm_irq_to_irt(int irq) |
| 63 | { |
| 64 | if (!PIC_IRQ_IS_IRT(irq)) |
| 65 | return -1; |
| 66 | |
| 67 | switch (irq) { |
| 68 | case PIC_UART_0_IRQ: |
| 69 | return PIC_IRT_UART_0_INDEX; |
| 70 | case PIC_UART_1_IRQ: |
| 71 | return PIC_IRT_UART_1_INDEX; |
| 72 | default: |
| 73 | return -1; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | int nlm_irt_to_irq(int irt) |
| 78 | { |
| 79 | switch (irt) { |
| 80 | case PIC_IRT_UART_0_INDEX: |
| 81 | return PIC_UART_0_IRQ; |
| 82 | case PIC_IRT_UART_1_INDEX: |
| 83 | return PIC_UART_1_IRQ; |
| 84 | default: |
| 85 | return -1; |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | unsigned int nlm_get_cpu_frequency(void) |
| 90 | { |
| 91 | unsigned int pll_divf, pll_divr, dfs_div, denom; |
| 92 | unsigned int val; |
| 93 | uint64_t num; |
| 94 | |
| 95 | val = nlm_read_sys_reg(nlm_sys_base, SYS_POWER_ON_RESET_CFG); |
| 96 | pll_divf = (val >> 10) & 0x7f; |
| 97 | pll_divr = (val >> 8) & 0x3; |
| 98 | dfs_div = (val >> 17) & 0x3; |
| 99 | |
| 100 | num = pll_divf + 1; |
| 101 | denom = 3 * (pll_divr + 1) * (1 << (dfs_div + 1)); |
| 102 | num = num * 800000000ULL; |
| 103 | do_div(num, denom); |
| 104 | return (unsigned int)num; |
| 105 | } |