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[src/trunk]: src/sys/arch am335x: expect the board code to provide a set_mpu_...
details: https://anonhg.NetBSD.org/src/rev/9b7625605911
branches: trunk
changeset: 330784:9b7625605911
user: bouyer <bouyer%NetBSD.org@localhost>
date: Sun Jul 20 23:08:43 2014 +0000
description:
am335x: expect the board code to provide a set_mpu_volt() function,
to change the MPU code voltage. When changing MPU frequency also request
a voltage change. provide frequency/voltage tables for the "blank" revision
and de A revision, based on documents from www.ti.com (this means
it's not possible anymore to request a beaglebone white to run at 1Ghz,
but this was not working anyway).
beagle_machdep.c: callback to the tps65217pmic to change the MPU voltage.
Tested on beaglebone, from 275 to 720Mhz, and on beaglebone black from
300 to 1000Mhz.
diffstat:
sys/arch/arm/omap/am335x_prcm.c | 124 ++++++++++++++++++++++++-------
sys/arch/arm/omap/am335x_prcm.h | 4 +-
sys/arch/arm/omap/omap2_reg.h | 7 +-
sys/arch/evbarm/beagle/beagle_machdep.c | 21 ++++-
4 files changed, 121 insertions(+), 35 deletions(-)
diffs (293 lines):
diff -r fd1bc2489c77 -r 9b7625605911 sys/arch/arm/omap/am335x_prcm.c
--- a/sys/arch/arm/omap/am335x_prcm.c Sun Jul 20 23:01:22 2014 +0000
+++ b/sys/arch/arm/omap/am335x_prcm.c Sun Jul 20 23:08:43 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: am335x_prcm.c,v 1.6 2013/08/17 00:40:10 matt Exp $ */
+/* $NetBSD: am335x_prcm.c,v 1.7 2014/07/20 23:08:43 bouyer Exp $ */
/*
* TI OMAP Power, Reset, and Clock Management on the AM335x
@@ -34,7 +34,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: am335x_prcm.c,v 1.6 2013/08/17 00:40:10 matt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: am335x_prcm.c,v 1.7 2014/07/20 23:08:43 bouyer Exp $");
#include <sys/types.h>
#include <sys/param.h>
@@ -50,6 +50,8 @@
#define AM335X_CLKCTRL_MODULEMODE_DISABLED 0
#define AM335X_CLKCTRL_MODULEMODE_ENABLE 2
+uint32_t am335x_devid;
+
static void
am335x_prcm_check_clkctrl(bus_size_t cm_module,
bus_size_t clkctrl_reg, uint32_t v)
@@ -98,19 +100,38 @@
am335x_prcm_check_clkctrl(cm_module, clkctrl_reg, clkctrl);
}
-static const uint16_t mpu_frequencies[] = {
- 550,
- 600,
- 650,
- 700,
- 720,
- 800,
- 900,
- 1000
+/*
+ * MPU frequency and power table, built from informations in
+ * http://processors.wiki.ti.com/index.php/AM335x_Power_Estimation_Tool
+ */
+
+struct mpu_frequency {
+ uint16_t freq; /* MPU frequency in Khz */
+ uint16_t mvolt; /* MPU voltage in millivolt */
};
-static int mpu_frequency;
-void
+static const struct mpu_frequency mpu_frequencies_rev0_zcz[] = {
+ {275, 1100},
+ {500, 1100},
+ {600, 1200},
+ {720, 1260},
+ {0, 0},
+};
+static const struct mpu_frequency mpu_frequencies_revA_zcz[] = {
+ {300, 950},
+ {550, 1100},
+ {600, 1100},
+ {720, 1200},
+ {800, 1260},
+ {900, 1325},
+ {1000, 1325},
+ {0, 0},
+};
+static const struct mpu_frequency *mpu_frequencies = NULL;
+
+static struct mpu_frequency mpu_frequency;
+
+static void
prcm_mpu_pll_config(u_int mpupll_m)
{
uint32_t clkmode = prcm_read_4(AM335X_PRCM_CM_WKUP, AM335X_PRCM_CM_CLKMODE_DPLL_MPU);
@@ -144,12 +165,15 @@
mpu_current_frequency_sysctl_helper(SYSCTLFN_ARGS)
{
struct sysctlnode node = *rnode;
- int freq = mpu_frequency;
+ int freq = mpu_frequency.freq;
int old_freq = freq;
+ int old_mvolt = mpu_frequency.mvolt;
+ struct mpu_frequency new_mpu_frequency;
- KASSERTMSG(curcpu()->ci_data.cpu_cc_freq == mpu_frequency * 1000000,
+ KASSERTMSG(
+ curcpu()->ci_data.cpu_cc_freq == mpu_frequency.freq * 1000000,
"cc_freq %"PRIu64" mpu_freq %u000000",
- curcpu()->ci_data.cpu_cc_freq, mpu_frequency);
+ curcpu()->ci_data.cpu_cc_freq, mpu_frequency.freq);
node.sysctl_data = &freq;
@@ -158,11 +182,12 @@
if (error || newp == NULL)
return error;
- KASSERT(old_freq == mpu_frequency);
+ KASSERT(old_freq == mpu_frequency.freq);
error = EINVAL;
- for (size_t i = 0; i < __arraycount(mpu_frequencies); i++) {
- if (mpu_frequencies[i] == freq) {
+ for (size_t i = 0; mpu_frequencies[i].freq > 0; i++) {
+ if (mpu_frequencies[i].freq == freq) {
+ new_mpu_frequency = mpu_frequencies[i];
error = 0;
break;
}
@@ -171,11 +196,30 @@
return EINVAL;
if (freq != old_freq) {
- const int s = splhigh();
+ int s;
+ if (new_mpu_frequency.mvolt > old_mvolt) {
+ /* need to raise VMPU before raising freq */
+ error = set_mpu_volt(new_mpu_frequency.mvolt);
+ }
+ if (error)
+ return error;
+ s = splhigh();
prcm_mpu_pll_config(freq);
curcpu()->ci_data.cpu_cc_freq = freq * 1000000;
- mpu_frequency = freq;
+ mpu_frequency = new_mpu_frequency;
splx(s);
+ if (mpu_frequency.mvolt < old_mvolt) {
+ /* need to lower VMPU after lowering freq */
+ error = set_mpu_volt(mpu_frequency.mvolt);
+ if (error) {
+ /* if we failed to lower VMPU, record it */
+ aprint_error_dev(curcpu()->ci_dev,
+ "warning: failed to change MPU voltage from "
+ "%d to %d\n",
+ old_mvolt, mpu_frequency.mvolt);
+ mpu_frequency.mvolt = old_mvolt;
+ }
+ }
aprint_normal_dev(curcpu()->ci_dev,
"frequency changed from %d MHz to %d MHz\n",
old_freq, freq);
@@ -188,16 +232,36 @@
SYSCTL_SETUP(sysctl_am335x_machdep_setup, "sysctl am335x machdep subtree setup")
{
const struct sysctlnode *freqnode, *node;
+ int i;
+ int cc_freq = curcpu()->ci_data.cpu_cc_freq / 1000000;
- static char mpu_available_frequencies[__arraycount(mpu_frequencies)*6];
+ static char mpu_available_frequencies[__arraycount(mpu_frequencies_revA_zcz)*6];
+ char cur_cpu_freq[6];
- __CTASSERT(__arraycount(mpu_frequencies) == 8);
- snprintf(mpu_available_frequencies, sizeof(mpu_available_frequencies),
- "%u %u %u %u %u %u %u %u",
- mpu_frequencies[0], mpu_frequencies[1], mpu_frequencies[2],
- mpu_frequencies[3], mpu_frequencies[4], mpu_frequencies[5],
- mpu_frequencies[6], mpu_frequencies[7]);
- mpu_frequency = curcpu()->ci_data.cpu_cc_freq / 1000000;
+ if (TI_AM335X_CTLMOD_DEVID_REV(am335x_devid) == 0)
+ mpu_frequencies = mpu_frequencies_rev0_zcz;
+ else
+ mpu_frequencies = mpu_frequencies_revA_zcz;
+ mpu_available_frequencies[0] = '\0';
+ for (i = 0 ; mpu_frequencies[i].freq > 0; i++) {
+ snprintf(cur_cpu_freq, sizeof(cur_cpu_freq), "%u",
+ mpu_frequencies[i].freq);
+ if (i > 0) {
+ strlcat(mpu_available_frequencies, " ",
+ sizeof(mpu_available_frequencies));
+ }
+ strlcat(mpu_available_frequencies, cur_cpu_freq,
+ sizeof(mpu_available_frequencies));
+ }
+ /* locate current freq in array */
+ for (i = 0; mpu_frequencies[i].freq > 0; i++) {
+ if (mpu_frequencies[i].freq >= cc_freq) {
+ mpu_frequency = mpu_frequencies[i];
+ mpu_frequency.freq = cc_freq;
+ break;
+ }
+ }
+ KASSERT(mpu_frequency.mvolt > 0);
sysctl_createv(clog, 0, NULL, &node,
CTLFLAG_PERMANENT,
@@ -234,6 +298,8 @@
const uint32_t control_status = bus_space_read_4(&omap_bs_tag,
ctlmode_ioh, CTLMOD_CONTROL_STATUS);
omap_sys_clk = sys_clks[__SHIFTOUT(control_status, CTLMOD_CONTROL_STATUS_SYSBOOT1)];
+
+ am335x_devid = bus_space_read_4(&omap_bs_tag, ctlmode_ioh, TI_AM335X_CTLMOD_DEVID);
}
void
diff -r fd1bc2489c77 -r 9b7625605911 sys/arch/arm/omap/am335x_prcm.h
--- a/sys/arch/arm/omap/am335x_prcm.h Sun Jul 20 23:01:22 2014 +0000
+++ b/sys/arch/arm/omap/am335x_prcm.h Sun Jul 20 23:08:43 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: am335x_prcm.h,v 1.7 2014/07/16 18:24:35 bouyer Exp $ */
+/* $NetBSD: am335x_prcm.h,v 1.8 2014/07/20 23:08:43 bouyer Exp $ */
/*
* TI OMAP Power, Reset, and Clock Management on the AM335x
@@ -149,7 +149,7 @@
#define RST_GLOBAL_COLD_SW __BIT(1)
#ifdef _KERNEL
-void prcm_mpu_pll_config(u_int);
+int set_mpu_volt(int);
void am335x_sys_clk(bus_space_handle_t);
void am335x_cpu_clk(void);
#endif
diff -r fd1bc2489c77 -r 9b7625605911 sys/arch/arm/omap/omap2_reg.h
--- a/sys/arch/arm/omap/omap2_reg.h Sun Jul 20 23:01:22 2014 +0000
+++ b/sys/arch/arm/omap/omap2_reg.h Sun Jul 20 23:08:43 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: omap2_reg.h,v 1.27 2014/04/04 21:33:19 matt Exp $ */
+/* $NetBSD: omap2_reg.h,v 1.28 2014/07/20 23:08:43 bouyer Exp $ */
/*
* Copyright (c) 2007 Microsoft
@@ -882,8 +882,11 @@
#ifdef TI_AM335X
#define TI_AM335X_CTLMOD_BASE 0x44e10000
-#define CTLMOD_CONTROL_STATUS 0x40
+#define CTLMOD_CONTROL_STATUS 0x0040
#define CTLMOD_CONTROL_STATUS_SYSBOOT1 __BITS(23,22)
+
+#define TI_AM335X_CTLMOD_DEVID 0x0600
+#define TI_AM335X_CTLMOD_DEVID_REV(x) (((x) >> 28) & 0xf)
#endif
#if defined(OMAP4) || defined(TI_AM335X)
#define EMIF_SDRAM_CONFIG 8
diff -r fd1bc2489c77 -r 9b7625605911 sys/arch/evbarm/beagle/beagle_machdep.c
--- a/sys/arch/evbarm/beagle/beagle_machdep.c Sun Jul 20 23:01:22 2014 +0000
+++ b/sys/arch/evbarm/beagle/beagle_machdep.c Sun Jul 20 23:08:43 2014 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: beagle_machdep.c,v 1.58 2014/07/19 18:16:50 bouyer Exp $ */
+/* $NetBSD: beagle_machdep.c,v 1.59 2014/07/20 23:08:43 bouyer Exp $ */
/*
* Machine dependent functions for kernel setup for TI OSK5912 board.
@@ -125,7 +125,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: beagle_machdep.c,v 1.58 2014/07/19 18:16:50 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: beagle_machdep.c,v 1.59 2014/07/20 23:08:43 bouyer Exp $");
#include "opt_machdep.h"
#include "opt_ddb.h"
@@ -189,6 +189,7 @@
# error no prcm device configured.
# endif
# include <arm/omap/am335x_prcm.h>
+# include <dev/i2c/tps65217pmicvar.h>
# if NSDHC > 0
# include <arm/omap/omap2_obiovar.h>
# include <arm/omap/omap3_sdmmcreg.h>
@@ -238,6 +239,9 @@
#ifdef CPU_CORTEXA15
uint32_t omap5_cnt_frq;
#endif
+#if defined(TI_AM335X)
+device_t pmic_dev = NULL;
+#endif
/*
* Macros to translate between physical and virtual for a subset of the
@@ -1107,4 +1111,17 @@
if (use_fb_console)
prop_dictionary_set_bool(dict, "is_console", false);
}
+ if (device_is_a(self, "tps65217pmic")) {
+ pmic_dev = self;
+ }
}
+
+int
+set_mpu_volt(int mvolt)
+{
+ if (pmic_dev == NULL)
+ return ENODEV;
+
+ /* MPU voltage is on vdcd2 */
+ return tps65217pmic_set_volt(pmic_dev, "DCDC2", mvolt);
+}
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