From: Ganesan Ramalingam <ganesanr@xxxxxxxxxxxx>
Add code to calculate the CPU and PIC frequency for XLP2XX SoCs.
Since the PIC frequency on XLP2XX can be configured, add a new macro
pic_timer_freq() to be used in netlogic/common/time.c.
Signed-off-by: Jayachandran C <jchandra@xxxxxxxxxxxx>
---
arch/mips/include/asm/netlogic/xlp-hal/pic.h | 5 +-
arch/mips/include/asm/netlogic/xlp-hal/sys.h | 31 +++++++
arch/mips/include/asm/netlogic/xlr/pic.h | 2 +
arch/mips/netlogic/common/time.c | 3 +-
arch/mips/netlogic/xlp/nlm_hal.c | 123 ++++++++++++++++++++++++--
5 files changed, 153 insertions(+), 11 deletions(-)
diff --git a/arch/mips/include/asm/netlogic/xlp-hal/pic.h b/arch/mips/include/asm/netlogic/xlp-hal/pic.h
index 4b5108d..105389b 100644
--- a/arch/mips/include/asm/netlogic/xlp-hal/pic.h
+++ b/arch/mips/include/asm/netlogic/xlp-hal/pic.h
@@ -208,13 +208,14 @@
#define PIC_LOCAL_SCHEDULING 1
#define PIC_GLOBAL_SCHEDULING 0
-#define PIC_CLK_HZ 133333333
-
#define nlm_read_pic_reg(b, r) nlm_read_reg64(b, r)
#define nlm_write_pic_reg(b, r, v) nlm_write_reg64(b, r, v)
#define nlm_get_pic_pcibase(node) nlm_pcicfg_base(XLP_IO_PIC_OFFSET(node))
#define nlm_get_pic_regbase(node) (nlm_get_pic_pcibase(node) + XLP_IO_PCI_HDRSZ)
+/* We use PIC on node 0 as a timer */
+#define pic_timer_freq() nlm_get_pic_frequency(0)
+
/* IRT and h/w interrupt routines */
static inline int
nlm_pic_read_irt(uint64_t base, int irt_index)
diff --git a/arch/mips/include/asm/netlogic/xlp-hal/sys.h b/arch/mips/include/asm/netlogic/xlp-hal/sys.h
index 470e52b..fcf2833 100644
--- a/arch/mips/include/asm/netlogic/xlp-hal/sys.h
+++ b/arch/mips/include/asm/netlogic/xlp-hal/sys.h
@@ -117,6 +117,36 @@
#define SYS_SCRTCH2 0x4b
#define SYS_SCRTCH3 0x4c
+/* PLL registers XLP2XX */
+#define SYS_PLL_CTRL0 0x240
+#define SYS_PLL_CTRL1 0x241
+#define SYS_PLL_CTRL2 0x242
+#define SYS_PLL_CTRL3 0x243
+#define SYS_DMC_PLL_CTRL0 0x244
+#define SYS_DMC_PLL_CTRL1 0x245
+#define SYS_DMC_PLL_CTRL2 0x246
+#define SYS_DMC_PLL_CTRL3 0x247
+
+#define SYS_PLL_CTRL0_DEVX(x) (0x248 + (x) * 4)
+#define SYS_PLL_CTRL1_DEVX(x) (0x249 + (x) * 4)
+#define SYS_PLL_CTRL2_DEVX(x) (0x24a + (x) * 4)
+#define SYS_PLL_CTRL3_DEVX(x) (0x24b + (x) * 4)
+
+#define SYS_CPU_PLL_CHG_CTRL 0x288
+#define SYS_PLL_CHG_CTRL 0x289
+#define SYS_CLK_DEV_DIS 0x28a
+#define SYS_CLK_DEV_SEL 0x28b
+#define SYS_CLK_DEV_DIV 0x28c
+#define SYS_CLK_DEV_CHG 0x28d
+#define SYS_CLK_DEV_SEL_REG 0x28e
+#define SYS_CLK_DEV_DIV_REG 0x28f
+#define SYS_CPU_PLL_LOCK 0x29f
+#define SYS_SYS_PLL_LOCK 0x2a0
+#define SYS_PLL_MEM_CMD 0x2a1
+#define SYS_CPU_PLL_MEM_REQ 0x2a2
+#define SYS_SYS_PLL_MEM_REQ 0x2a3
+#define SYS_PLL_MEM_STAT 0x2a4
+
#ifndef __ASSEMBLY__
#define nlm_read_sys_reg(b, r) nlm_read_reg(b, r)
@@ -124,5 +154,6 @@
#define nlm_get_sys_pcibase(node) nlm_pcicfg_base(XLP_IO_SYS_OFFSET(node))
#define nlm_get_sys_regbase(node) (nlm_get_sys_pcibase(node) + XLP_IO_PCI_HDRSZ)
+unsigned int nlm_get_pic_frequency(int node);
#endif
#endif
diff --git a/arch/mips/include/asm/netlogic/xlr/pic.h b/arch/mips/include/asm/netlogic/xlr/pic.h
index 63c9917..3c80a75 100644
--- a/arch/mips/include/asm/netlogic/xlr/pic.h
+++ b/arch/mips/include/asm/netlogic/xlr/pic.h
@@ -36,6 +36,8 @@
#define _ASM_NLM_XLR_PIC_H
#define PIC_CLK_HZ 66666666
+#define pic_timer_freq() PIC_CLK_HZ
+
/* PIC hardware interrupt numbers */
#define PIC_IRT_WD_INDEX 0
#define PIC_IRT_TIMER_0_INDEX 1
diff --git a/arch/mips/netlogic/common/time.c b/arch/mips/netlogic/common/time.c
index 045a396..13391b8 100644
--- a/arch/mips/netlogic/common/time.c
+++ b/arch/mips/netlogic/common/time.c
@@ -45,6 +45,7 @@
#if defined(CONFIG_CPU_XLP)
#include <asm/netlogic/xlp-hal/iomap.h>
#include <asm/netlogic/xlp-hal/xlp.h>
+#include <asm/netlogic/xlp-hal/sys.h>
#include <asm/netlogic/xlp-hal/pic.h>
#elif defined(CONFIG_CPU_XLR)
#include <asm/netlogic/xlr/iomap.h>
@@ -91,7 +92,7 @@ static void nlm_init_pic_timer(void)
csrc_pic.read = nlm_get_pic_timer;
}
csrc_pic.rating = 1000;
- clocksource_register_hz(&csrc_pic, PIC_CLK_HZ);
+ clocksource_register_hz(&csrc_pic, pic_timer_freq());
}
void __init plat_time_init(void)
diff --git a/arch/mips/netlogic/xlp/nlm_hal.c b/arch/mips/netlogic/xlp/nlm_hal.c
index 6f2c210..22e2e02 100644
--- a/arch/mips/netlogic/xlp/nlm_hal.c
+++ b/arch/mips/netlogic/xlp/nlm_hal.c
@@ -127,18 +127,125 @@ unsigned int nlm_get_core_frequency(int node, int core)
sysbase = nlm_get_node(node)->sysbase;
rstval = nlm_read_sys_reg(sysbase, SYS_POWER_ON_RESET_CFG);
- 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;
+ 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);
--
1.7.9.5
