mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-13 20:50:18 +02:00
6c4398bc6a
Ethernet and wifi are not working and this is highly experimental. git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27301 3c298f89-4303-0410-b956-a3cf2f4a3e73
205 lines
6.3 KiB
Diff
205 lines
6.3 KiB
Diff
From 257d5fe12600f08df764cac0abc17bef7b6fae9b Mon Sep 17 00:00:00 2001
|
|
From: Hauke Mehrtens <hauke@hauke-m.de>
|
|
Date: Sun, 19 Jun 2011 17:51:30 +0200
|
|
Subject: [PATCH 07/14] bcma: get CPU clock
|
|
|
|
Add method to return the clock of the CPU. This is needed by the arch
|
|
code to calculate the mips_hpt_frequency.
|
|
|
|
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
|
|
---
|
|
drivers/bcma/bcma_private.h | 3 +
|
|
drivers/bcma/driver_chipcommon_pmu.c | 87 +++++++++++++++++++++++++++
|
|
drivers/bcma/driver_mips.c | 12 ++++
|
|
include/linux/bcma/bcma_driver_chipcommon.h | 35 +++++++++++
|
|
include/linux/bcma/bcma_driver_mips.h | 1 +
|
|
5 files changed, 138 insertions(+), 0 deletions(-)
|
|
|
|
--- a/drivers/bcma/bcma_private.h
|
|
+++ b/drivers/bcma/bcma_private.h
|
|
@@ -29,6 +29,9 @@ void bcma_init_bus(struct bcma_bus *bus)
|
|
/* sprom.c */
|
|
int bcma_sprom_get(struct bcma_bus *bus);
|
|
|
|
+/* driver_chipcommon_pmu.c */
|
|
+extern u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc);
|
|
+
|
|
/* driver_chipcommon.c */
|
|
#ifdef CONFIG_BCMA_DRIVER_MIPS
|
|
extern int bcma_chipco_serial_init(struct bcma_drv_cc *cc,
|
|
--- a/drivers/bcma/driver_chipcommon_pmu.c
|
|
+++ b/drivers/bcma/driver_chipcommon_pmu.c
|
|
@@ -11,6 +11,13 @@
|
|
#include "bcma_private.h"
|
|
#include <linux/bcma/bcma.h>
|
|
|
|
+static u32 bcma_chipco_pll_read(struct bcma_drv_cc *cc, u32 offset)
|
|
+{
|
|
+ bcma_cc_write32(cc, BCMA_CC_PLLCTL_ADDR, offset);
|
|
+ bcma_cc_read32(cc, BCMA_CC_PLLCTL_ADDR);
|
|
+ return bcma_cc_read32(cc, BCMA_CC_PLLCTL_DATA);
|
|
+}
|
|
+
|
|
static void bcma_chipco_chipctl_maskset(struct bcma_drv_cc *cc,
|
|
u32 offset, u32 mask, u32 set)
|
|
{
|
|
@@ -136,3 +143,83 @@ void bcma_pmu_init(struct bcma_drv_cc *c
|
|
bcma_pmu_swreg_init(cc);
|
|
bcma_pmu_workarounds(cc);
|
|
}
|
|
+
|
|
+static u32 bcma_pmu_alp_clock(struct bcma_drv_cc *cc)
|
|
+{
|
|
+ struct bcma_bus *bus = cc->core->bus;
|
|
+
|
|
+ switch (bus->chipinfo.id) {
|
|
+ case 0x4716:
|
|
+ case 0x4748:
|
|
+ case 47162:
|
|
+ /* always 20Mhz */
|
|
+ return 20000 * 1000;
|
|
+ default:
|
|
+ pr_warn("No ALP clock specified for %04X device, "
|
|
+ "pmu rev. %d, using default %d Hz\n",
|
|
+ bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_ALP_CLOCK);
|
|
+ }
|
|
+ return BCMA_CC_PMU_ALP_CLOCK;
|
|
+}
|
|
+
|
|
+/* Find the output of the "m" pll divider given pll controls that start with
|
|
+ * pllreg "pll0" i.e. 12 for main 6 for phy, 0 for misc.
|
|
+ */
|
|
+static u32 bcma_pmu_clock(struct bcma_drv_cc *cc, u32 pll0, u32 m)
|
|
+{
|
|
+ u32 tmp, div, ndiv, p1, p2, fc;
|
|
+
|
|
+ BUG_ON(!m || m > 4);
|
|
+
|
|
+ BUG_ON((pll0 & 3) || (pll0 > BCMA_CC_PMU4716_MAINPLL_PLL0));
|
|
+
|
|
+ tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_P1P2_OFF);
|
|
+ p1 = (tmp & BCMA_CC_PPL_P1_MASK) >> BCMA_CC_PPL_P1_SHIFT;
|
|
+ p2 = (tmp & BCMA_CC_PPL_P2_MASK) >> BCMA_CC_PPL_P2_SHIFT;
|
|
+
|
|
+ tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_M14_OFF);
|
|
+ div = (tmp >> ((m - 1) * BCMA_CC_PPL_MDIV_WIDTH)) &
|
|
+ BCMA_CC_PPL_MDIV_MASK;
|
|
+
|
|
+ tmp = bcma_chipco_pll_read(cc, pll0 + BCMA_CC_PPL_NM5_OFF);
|
|
+ ndiv = (tmp & BCMA_CC_PPL_NDIV_MASK) >> BCMA_CC_PPL_NDIV_SHIFT;
|
|
+
|
|
+ /* Do calculation in Mhz */
|
|
+ fc = bcma_pmu_alp_clock(cc) / 1000000;
|
|
+ fc = (p1 * ndiv * fc) / p2;
|
|
+
|
|
+ /* Return clock in Hertz */
|
|
+ return (fc / div) * 1000000;
|
|
+}
|
|
+
|
|
+/* query bus clock frequency for PMU-enabled chipcommon */
|
|
+u32 bcma_pmu_get_clockcontrol(struct bcma_drv_cc *cc)
|
|
+{
|
|
+ struct bcma_bus *bus = cc->core->bus;
|
|
+
|
|
+ switch (bus->chipinfo.id) {
|
|
+ case 0x4716:
|
|
+ case 0x4748:
|
|
+ case 47162:
|
|
+ return bcma_pmu_clock(cc, BCMA_CC_PMU4716_MAINPLL_PLL0,
|
|
+ BCMA_CC_PMU5_MAINPLL_SSB);
|
|
+ default:
|
|
+ pr_warn("No backplane clock specified for %04X device, "
|
|
+ "pmu rev. %d, using default %d Hz\n",
|
|
+ bus->chipinfo.id, cc->pmu.rev, BCMA_CC_PMU_HT_CLOCK);
|
|
+ }
|
|
+ return BCMA_CC_PMU_HT_CLOCK;
|
|
+}
|
|
+
|
|
+/* query cpu clock frequency for PMU-enabled chipcommon */
|
|
+u32 bcma_pmu_get_clockcpu(struct bcma_drv_cc *cc)
|
|
+{
|
|
+ struct bcma_bus *bus = cc->core->bus;
|
|
+
|
|
+ if ((cc->pmu.rev == 5 || cc->pmu.rev == 6 || cc->pmu.rev == 7) &&
|
|
+ (bus->chipinfo.id != 0x4319))
|
|
+ return bcma_pmu_clock(cc, BCMA_CC_PMU4716_MAINPLL_PLL0,
|
|
+ BCMA_CC_PMU5_MAINPLL_CPU);
|
|
+
|
|
+ return bcma_pmu_get_clockcontrol(cc);
|
|
+}
|
|
--- a/drivers/bcma/driver_mips.c
|
|
+++ b/drivers/bcma/driver_mips.c
|
|
@@ -157,6 +157,18 @@ static void bcma_core_mips_dump_irq(stru
|
|
}
|
|
}
|
|
|
|
+u32 bcma_cpu_clock(struct bcma_drv_mips *mcore)
|
|
+{
|
|
+ struct bcma_bus *bus = mcore->core->bus;
|
|
+
|
|
+ if (bus->drv_cc.capabilities & BCMA_CC_CAP_PMU)
|
|
+ return bcma_pmu_get_clockcpu(&bus->drv_cc);
|
|
+
|
|
+ pr_err("No PMU available, need this to get the cpu clock\n");
|
|
+ return 0;
|
|
+}
|
|
+EXPORT_SYMBOL(bcma_cpu_clock);
|
|
+
|
|
static void bcma_core_mips_serial_init(struct bcma_drv_mips *mcore)
|
|
{
|
|
struct bcma_bus *bus = mcore->core->bus;
|
|
--- a/include/linux/bcma/bcma_driver_chipcommon.h
|
|
+++ b/include/linux/bcma/bcma_driver_chipcommon.h
|
|
@@ -246,6 +246,41 @@
|
|
#define BCMA_CC_PLLCTL_DATA 0x0664
|
|
#define BCMA_CC_SPROM 0x0830 /* SPROM beginning */
|
|
|
|
+/* Divider allocation in 4716/47162/5356 */
|
|
+#define BCMA_CC_PMU5_MAINPLL_CPU 1
|
|
+#define BCMA_CC_PMU5_MAINPLL_MEM 2
|
|
+#define BCMA_CC_PMU5_MAINPLL_SSB 3
|
|
+
|
|
+/* PLL usage in 4716/47162 */
|
|
+#define BCMA_CC_PMU4716_MAINPLL_PLL0 12
|
|
+
|
|
+/* ALP clock on pre-PMU chips */
|
|
+#define BCMA_CC_PMU_ALP_CLOCK 20000000
|
|
+/* HT clock for systems with PMU-enabled chipcommon */
|
|
+#define BCMA_CC_PMU_HT_CLOCK 80000000
|
|
+
|
|
+/* PMU rev 5 (& 6) */
|
|
+#define BCMA_CC_PPL_P1P2_OFF 0
|
|
+#define BCMA_CC_PPL_P1_MASK 0x0f000000
|
|
+#define BCMA_CC_PPL_P1_SHIFT 24
|
|
+#define BCMA_CC_PPL_P2_MASK 0x00f00000
|
|
+#define BCMA_CC_PPL_P2_SHIFT 20
|
|
+#define BCMA_CC_PPL_M14_OFF 1
|
|
+#define BCMA_CC_PPL_MDIV_MASK 0x000000ff
|
|
+#define BCMA_CC_PPL_MDIV_WIDTH 8
|
|
+#define BCMA_CC_PPL_NM5_OFF 2
|
|
+#define BCMA_CC_PPL_NDIV_MASK 0xfff00000
|
|
+#define BCMA_CC_PPL_NDIV_SHIFT 20
|
|
+#define BCMA_CC_PPL_FMAB_OFF 3
|
|
+#define BCMA_CC_PPL_MRAT_MASK 0xf0000000
|
|
+#define BCMA_CC_PPL_MRAT_SHIFT 28
|
|
+#define BCMA_CC_PPL_ABRAT_MASK 0x08000000
|
|
+#define BCMA_CC_PPL_ABRAT_SHIFT 27
|
|
+#define BCMA_CC_PPL_FDIV_MASK 0x07ffffff
|
|
+#define BCMA_CC_PPL_PLLCTL_OFF 4
|
|
+#define BCMA_CC_PPL_PCHI_OFF 5
|
|
+#define BCMA_CC_PPL_PCHI_MASK 0x0000003f
|
|
+
|
|
/* Data for the PMU, if available.
|
|
* Check availability with ((struct bcma_chipcommon)->capabilities & BCMA_CC_CAP_PMU)
|
|
*/
|
|
--- a/include/linux/bcma/bcma_driver_mips.h
|
|
+++ b/include/linux/bcma/bcma_driver_mips.h
|
|
@@ -54,6 +54,7 @@ struct bcma_drv_mips {
|
|
};
|
|
|
|
extern void bcma_core_mips_init(struct bcma_drv_mips *mcore);
|
|
+extern u32 bcma_cpu_clock(struct bcma_drv_mips *mcore);
|
|
|
|
extern unsigned int bcma_core_mips_irq(struct bcma_device *dev);
|
|
|