brcm47xx: add initial support for devices with bcma bus.

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

1 files changed, 204 insertions, 0 deletions

diff --git a/target/linux/brcm47xx/patches-3.0/0007-bcma-get-CPU-clock.patch b/target/linux/brcm47xx/patches-3.0/0007-bcma-get-CPU-clock.patch
new file mode 100644
index 0000000000..7acdb74304
--- /dev/null
+++ b/target/linux/brcm47xx/patches-3.0/0007-bcma-get-CPU-clock.patch
@@ -0,0 +1,204 @@
+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);
+