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/*
* Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
* reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the NetLogic
* license below:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETLOGIC ``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 NETLOGIC OR CONTRIBUTORS 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.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <asm/mipsregs.h>
#include <asm/time.h>
#include <asm/netlogic/common.h>
#include <asm/netlogic/haldefs.h>
#include <asm/netlogic/xlp-hal/iomap.h>
#include <asm/netlogic/xlp-hal/xlp.h>
#include <asm/netlogic/xlp-hal/bridge.h>
#include <asm/netlogic/xlp-hal/pic.h>
#include <asm/netlogic/xlp-hal/sys.h>
/* Main initialization */
void nlm_node_init(int node)
{
struct nlm_soc_info *nodep;
nodep = nlm_get_node(node);
nodep->sysbase = nlm_get_sys_regbase(node);
nodep->picbase = nlm_get_pic_regbase(node);
nodep->ebase = read_c0_ebase() & (~((1 << 12) - 1));
spin_lock_init(&nodep->piclock);
}
int nlm_irq_to_irt(int irq)
{
uint64_t pcibase;
int devoff, irt;
devoff = 0;
switch (irq) {
case PIC_UART_0_IRQ:
devoff = XLP_IO_UART0_OFFSET(0);
break;
case PIC_UART_1_IRQ:
devoff = XLP_IO_UART1_OFFSET(0);
break;
case PIC_MMC_IRQ:
devoff = XLP_IO_SD_OFFSET(0);
break;
case PIC_I2C_0_IRQ: /* I2C will be fixed up */
case PIC_I2C_1_IRQ:
case PIC_I2C_2_IRQ:
case PIC_I2C_3_IRQ:
if (cpu_is_xlpii())
devoff = XLP2XX_IO_I2C_OFFSET(0);
else
devoff = XLP_IO_I2C0_OFFSET(0);
break;
default:
if (cpu_is_xlpii()) {
switch (irq) {
/* XLP2XX has three XHCI USB controller */
case PIC_2XX_XHCI_0_IRQ:
devoff = XLP2XX_IO_USB_XHCI0_OFFSET(0);
break;
case PIC_2XX_XHCI_1_IRQ:
devoff = XLP2XX_IO_USB_XHCI1_OFFSET(0);
break;
case PIC_2XX_XHCI_2_IRQ:
devoff = XLP2XX_IO_USB_XHCI2_OFFSET(0);
break;
}
} else {
switch (irq) {
case PIC_EHCI_0_IRQ:
devoff = XLP_IO_USB_EHCI0_OFFSET(0);
break;
case PIC_EHCI_1_IRQ:
devoff = XLP_IO_USB_EHCI1_OFFSET(0);
break;
case PIC_OHCI_0_IRQ:
devoff = XLP_IO_USB_OHCI0_OFFSET(0);
break;
case PIC_OHCI_1_IRQ:
devoff = XLP_IO_USB_OHCI1_OFFSET(0);
break;
case PIC_OHCI_2_IRQ:
devoff = XLP_IO_USB_OHCI2_OFFSET(0);
break;
case PIC_OHCI_3_IRQ:
devoff = XLP_IO_USB_OHCI3_OFFSET(0);
break;
}
}
}
if (devoff != 0) {
pcibase = nlm_pcicfg_base(devoff);
irt = nlm_read_reg(pcibase, XLP_PCI_IRTINFO_REG) & 0xffff;
/* HW weirdness, I2C IRT entry has to be fixed up */
switch (irq) {
case PIC_I2C_1_IRQ:
irt = irt + 1; break;
case PIC_I2C_2_IRQ:
irt = irt + 2; break;
case PIC_I2C_3_IRQ:
irt = irt + 3; break;
}
} else if (irq >= PIC_PCIE_LINK_0_IRQ && irq <= PIC_PCIE_LINK_3_IRQ) {
/* HW bug, PCI IRT entries are bad on early silicon, fix */
irt = PIC_IRT_PCIE_LINK_INDEX(irq - PIC_PCIE_LINK_0_IRQ);
} else {
irt = -1;
}
return irt;
}
unsigned int nlm_get_core_frequency(int node, int core)
{
unsigned int pll_divf, pll_divr, dfs_div, ext_div;
unsigned int rstval, dfsval, denom;
uint64_t num, sysbase;
sysbase = nlm_get_node(node)->sysbase;
rstval = nlm_read_sys_reg(sysbase, SYS_POWER_ON_RESET_CFG);
if (cpu_is_xlpii()) {
num = 1000000ULL * (400 * 3 + 100 * (rstval >> 26));
denom = 3;
} else {
dfsval = nlm_read_sys_reg(sysbase, SYS_CORE_DFS_DIV_VALUE);
pll_divf = ((rstval >> 10) & 0x7f) + 1;
pll_divr = ((rstval >> 8) & 0x3) + 1;
ext_div = ((rstval >> 30) & 0x3) + 1;
dfs_div = ((dfsval >> (core * 4)) & 0xf) + 1;
num = 800000000ULL * pll_divf;
denom = 3 * pll_divr * ext_div * dfs_div;
}
do_div(num, denom);
return (unsigned int)num;
}
/* Calculate Frequency to the PIC from PLL.
* freq_out = ( ref_freq/2 * (6 + ctrl2[7:0]) + ctrl2[20:8]/2^13 ) /
* ((2^ctrl0[7:5]) * Table(ctrl0[26:24]))
*/
static unsigned int nlm_2xx_get_pic_frequency(int node)
{
u32 ctrl_val0, ctrl_val2, vco_post_div, pll_post_div;
u32 mdiv, fdiv, pll_out_freq_den, reg_select, ref_div, pic_div;
u64 ref_clk, sysbase, pll_out_freq_num, ref_clk_select;
sysbase = nlm_get_node(node)->sysbase;
/* Find ref_clk_base */
ref_clk_select =
(nlm_read_sys_reg(sysbase, SYS_POWER_ON_RESET_CFG) >> 18) & 0x3;
switch (ref_clk_select) {
case 0:
ref_clk = 200000000ULL;
ref_div = 3;
break;
case 1:
ref_clk = 100000000ULL;
ref_div = 1;
break;
case 2:
ref_clk = 125000000ULL;
ref_div = 1;
break;
case 3:
ref_clk = 400000000ULL;
ref_div = 3;
break;
}
/* Find the clock source PLL device for PIC */
reg_select = (nlm_read_sys_reg(sysbase, SYS_CLK_DEV_SEL) >> 22) & 0x3;
switch (reg_select) {
case 0:
ctrl_val0 = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL0);
ctrl_val2 = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL2);
break;
case 1:
ctrl_val0 = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL0_DEVX(0));
ctrl_val2 = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL2_DEVX(0));
break;
case 2:
ctrl_val0 = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL0_DEVX(1));
ctrl_val2 = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL2_DEVX(1));
break;
case 3:
ctrl_val0 = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL0_DEVX(2));
ctrl_val2 = nlm_read_sys_reg(sysbase, SYS_PLL_CTRL2_DEVX(2));
break;
}
vco_post_div = (ctrl_val0 >> 5) & 0x7;
pll_post_div = (ctrl_val0 >> 24) & 0x7;
mdiv = ctrl_val2 & 0xff;
fdiv = (ctrl_val2 >> 8) & 0xfff;
/* Find PLL post divider value */
switch (pll_post_div) {
case 1:
pll_post_div = 2;
break;
case 3:
pll_post_div = 4;
break;
case 7:
pll_post_div = 8;
break;
case 6:
pll_post_div = 16;
break;
case 0:
default:
pll_post_div = 1;
break;
}
fdiv = fdiv/(1 << 13);
pll_out_freq_num = ((ref_clk >> 1) * (6 + mdiv)) + fdiv;
pll_out_freq_den = (1 << vco_post_div) * pll_post_div * 3;
if (pll_out_freq_den > 0)
do_div(pll_out_freq_num, pll_out_freq_den);
/* PIC post divider, which happens after PLL */
pic_div = (nlm_read_sys_reg(sysbase, SYS_CLK_DEV_DIV) >> 22) & 0x3;
do_div(pll_out_freq_num, 1 << pic_div);
return pll_out_freq_num;
}
unsigned int nlm_get_pic_frequency(int node)
{
if (cpu_is_xlpii())
return nlm_2xx_get_pic_frequency(node);
else
return 133333333;
}
unsigned int nlm_get_cpu_frequency(void)
{
return nlm_get_core_frequency(0, 0);
}
/*
* Fills upto 8 pairs of entries containing the DRAM map of a node
* if n < 0, get dram map for all nodes
*/
int xlp_get_dram_map(int n, uint64_t *dram_map)
{
uint64_t bridgebase, base, lim;
uint32_t val;
int i, node, rv;
/* Look only at mapping on Node 0, we don't handle crazy configs */
bridgebase = nlm_get_bridge_regbase(0);
rv = 0;
for (i = 0; i < 8; i++) {
val = nlm_read_bridge_reg(bridgebase,
BRIDGE_DRAM_NODE_TRANSLN(i));
node = (val >> 1) & 0x3;
if (n >= 0 && n != node)
continue;
val = nlm_read_bridge_reg(bridgebase, BRIDGE_DRAM_BAR(i));
val = (val >> 12) & 0xfffff;
base = (uint64_t) val << 20;
val = nlm_read_bridge_reg(bridgebase, BRIDGE_DRAM_LIMIT(i));
val = (val >> 12) & 0xfffff;
if (val == 0) /* BAR not used */
continue;
lim = ((uint64_t)val + 1) << 20;
dram_map[rv] = base;
dram_map[rv + 1] = lim;
rv += 2;
}
return rv;
}
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