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authorJonas Gorski <jonas.gorski@gmail.com>2012-10-28 12:17:54 +0000
committerJohn Crispin <blogic@openwrt.org>2012-11-09 11:37:18 +0100
commit799faa626c71fbd92396abea28f7e3586de3c7f5 (patch)
tree77739a72f9a001cb8375df3f56b0917180cfc38f /arch/mips/bcm63xx
parente7e9937ff57a11b76e862f5445c46b53a76c6aa8 (diff)
MIPS: BCM63XX: add core reset helper
Add a reset helper for resetting the different cores. Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/4455 Signed-off-by: John Crispin <blogic@openwrt.org>
Diffstat (limited to 'arch/mips/bcm63xx')
-rw-r--r--arch/mips/bcm63xx/Makefile6
-rw-r--r--arch/mips/bcm63xx/reset.c223
2 files changed, 226 insertions, 3 deletions
diff --git a/arch/mips/bcm63xx/Makefile b/arch/mips/bcm63xx/Makefile
index 9bbb30a9dc20..bfc9b8422718 100644
--- a/arch/mips/bcm63xx/Makefile
+++ b/arch/mips/bcm63xx/Makefile
@@ -1,6 +1,6 @@
-obj-y += clk.o cpu.o cs.o gpio.o irq.o prom.o setup.o timer.o \
- dev-dsp.o dev-enet.o dev-flash.o dev-pcmcia.o dev-rng.o \
- dev-spi.o dev-uart.o dev-wdt.o dev-usb-usbd.o
+obj-y += clk.o cpu.o cs.o gpio.o irq.o prom.o reset.o setup.o \
+ timer.o dev-dsp.o dev-enet.o dev-flash.o dev-pcmcia.o \
+ dev-rng.o dev-spi.o dev-uart.o dev-wdt.o dev-usb-usbd.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-y += boards/
diff --git a/arch/mips/bcm63xx/reset.c b/arch/mips/bcm63xx/reset.c
new file mode 100644
index 000000000000..68a31bb90cbf
--- /dev/null
+++ b/arch/mips/bcm63xx/reset.c
@@ -0,0 +1,223 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <bcm63xx_cpu.h>
+#include <bcm63xx_io.h>
+#include <bcm63xx_regs.h>
+#include <bcm63xx_reset.h>
+
+#define __GEN_RESET_BITS_TABLE(__cpu) \
+ [BCM63XX_RESET_SPI] = BCM## __cpu ##_RESET_SPI, \
+ [BCM63XX_RESET_ENET] = BCM## __cpu ##_RESET_ENET, \
+ [BCM63XX_RESET_USBH] = BCM## __cpu ##_RESET_USBH, \
+ [BCM63XX_RESET_USBD] = BCM## __cpu ##_RESET_USBD, \
+ [BCM63XX_RESET_DSL] = BCM## __cpu ##_RESET_DSL, \
+ [BCM63XX_RESET_SAR] = BCM## __cpu ##_RESET_SAR, \
+ [BCM63XX_RESET_EPHY] = BCM## __cpu ##_RESET_EPHY, \
+ [BCM63XX_RESET_ENETSW] = BCM## __cpu ##_RESET_ENETSW, \
+ [BCM63XX_RESET_PCM] = BCM## __cpu ##_RESET_PCM, \
+ [BCM63XX_RESET_MPI] = BCM## __cpu ##_RESET_MPI, \
+ [BCM63XX_RESET_PCIE] = BCM## __cpu ##_RESET_PCIE, \
+ [BCM63XX_RESET_PCIE_EXT] = BCM## __cpu ##_RESET_PCIE_EXT,
+
+#define BCM6328_RESET_SPI SOFTRESET_6328_SPI_MASK
+#define BCM6328_RESET_ENET 0
+#define BCM6328_RESET_USBH SOFTRESET_6328_USBH_MASK
+#define BCM6328_RESET_USBD SOFTRESET_6328_USBS_MASK
+#define BCM6328_RESET_DSL 0
+#define BCM6328_RESET_SAR SOFTRESET_6328_SAR_MASK
+#define BCM6328_RESET_EPHY SOFTRESET_6328_EPHY_MASK
+#define BCM6328_RESET_ENETSW SOFTRESET_6328_ENETSW_MASK
+#define BCM6328_RESET_PCM SOFTRESET_6328_PCM_MASK
+#define BCM6328_RESET_MPI 0
+#define BCM6328_RESET_PCIE \
+ (SOFTRESET_6328_PCIE_MASK | \
+ SOFTRESET_6328_PCIE_CORE_MASK | \
+ SOFTRESET_6328_PCIE_HARD_MASK)
+#define BCM6328_RESET_PCIE_EXT SOFTRESET_6328_PCIE_EXT_MASK
+
+#define BCM6338_RESET_SPI SOFTRESET_6338_SPI_MASK
+#define BCM6338_RESET_ENET SOFTRESET_6338_ENET_MASK
+#define BCM6338_RESET_USBH SOFTRESET_6338_USBH_MASK
+#define BCM6338_RESET_USBD SOFTRESET_6338_USBS_MASK
+#define BCM6338_RESET_DSL SOFTRESET_6338_ADSL_MASK
+#define BCM6338_RESET_SAR SOFTRESET_6338_SAR_MASK
+#define BCM6338_RESET_EPHY 0
+#define BCM6338_RESET_ENETSW 0
+#define BCM6338_RESET_PCM 0
+#define BCM6338_RESET_MPI 0
+#define BCM6338_RESET_PCIE 0
+#define BCM6338_RESET_PCIE_EXT 0
+
+#define BCM6348_RESET_SPI SOFTRESET_6348_SPI_MASK
+#define BCM6348_RESET_ENET SOFTRESET_6348_ENET_MASK
+#define BCM6348_RESET_USBH SOFTRESET_6348_USBH_MASK
+#define BCM6348_RESET_USBD SOFTRESET_6348_USBS_MASK
+#define BCM6348_RESET_DSL SOFTRESET_6348_ADSL_MASK
+#define BCM6348_RESET_SAR SOFTRESET_6348_SAR_MASK
+#define BCM6348_RESET_EPHY 0
+#define BCM6348_RESET_ENETSW 0
+#define BCM6348_RESET_PCM 0
+#define BCM6348_RESET_MPI 0
+#define BCM6348_RESET_PCIE 0
+#define BCM6348_RESET_PCIE_EXT 0
+
+#define BCM6358_RESET_SPI SOFTRESET_6358_SPI_MASK
+#define BCM6358_RESET_ENET SOFTRESET_6358_ENET_MASK
+#define BCM6358_RESET_USBH SOFTRESET_6358_USBH_MASK
+#define BCM6358_RESET_USBD 0
+#define BCM6358_RESET_DSL SOFTRESET_6358_ADSL_MASK
+#define BCM6358_RESET_SAR SOFTRESET_6358_SAR_MASK
+#define BCM6358_RESET_EPHY SOFTRESET_6358_EPHY_MASK
+#define BCM6358_RESET_ENETSW 0
+#define BCM6358_RESET_PCM SOFTRESET_6358_PCM_MASK
+#define BCM6358_RESET_MPI SOFTRESET_6358_MPI_MASK
+#define BCM6358_RESET_PCIE 0
+#define BCM6358_RESET_PCIE_EXT 0
+
+#define BCM6368_RESET_SPI SOFTRESET_6368_SPI_MASK
+#define BCM6368_RESET_ENET 0
+#define BCM6368_RESET_USBH SOFTRESET_6368_USBH_MASK
+#define BCM6368_RESET_USBD SOFTRESET_6368_USBS_MASK
+#define BCM6368_RESET_DSL 0
+#define BCM6368_RESET_SAR SOFTRESET_6368_SAR_MASK
+#define BCM6368_RESET_EPHY SOFTRESET_6368_EPHY_MASK
+#define BCM6368_RESET_ENETSW 0
+#define BCM6368_RESET_PCM SOFTRESET_6368_PCM_MASK
+#define BCM6368_RESET_MPI SOFTRESET_6368_MPI_MASK
+#define BCM6368_RESET_PCIE 0
+#define BCM6368_RESET_PCIE_EXT 0
+
+#ifdef BCMCPU_RUNTIME_DETECT
+
+/*
+ * core reset bits
+ */
+static const u32 bcm6328_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6328)
+};
+
+static const u32 bcm6338_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6338)
+};
+
+static const u32 bcm6348_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6348)
+};
+
+static const u32 bcm6358_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6358)
+};
+
+static const u32 bcm6368_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6368)
+};
+
+const u32 *bcm63xx_reset_bits;
+static int reset_reg;
+
+static int __init bcm63xx_reset_bits_init(void)
+{
+ if (BCMCPU_IS_6328()) {
+ reset_reg = PERF_SOFTRESET_6328_REG;
+ bcm63xx_reset_bits = bcm6328_reset_bits;
+ } else if (BCMCPU_IS_6338()) {
+ reset_reg = PERF_SOFTRESET_REG;
+ bcm63xx_reset_bits = bcm6338_reset_bits;
+ } else if (BCMCPU_IS_6348()) {
+ reset_reg = PERF_SOFTRESET_REG;
+ bcm63xx_reset_bits = bcm6348_reset_bits;
+ } else if (BCMCPU_IS_6358()) {
+ reset_reg = PERF_SOFTRESET_6358_REG;
+ bcm63xx_reset_bits = bcm6358_reset_bits;
+ } else if (BCMCPU_IS_6368()) {
+ reset_reg = PERF_SOFTRESET_6368_REG;
+ bcm63xx_reset_bits = bcm6368_reset_bits;
+ }
+
+ return 0;
+}
+#else
+
+#ifdef CONFIG_BCM63XX_CPU_6328
+static const u32 bcm63xx_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6328)
+};
+#define reset_reg PERF_SOFTRESET_6328_REG
+#endif
+
+#ifdef CONFIG_BCM63XX_CPU_6338
+static const u32 bcm63xx_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6338)
+};
+#define reset_reg PERF_SOFTRESET_REG
+#endif
+
+#ifdef CONFIG_BCM63XX_CPU_6345
+static const u32 bcm63xx_reset_bits[] = { };
+#define reset_reg 0
+#endif
+
+#ifdef CONFIG_BCM63XX_CPU_6348
+static const u32 bcm63xx_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6348)
+};
+#define reset_reg PERF_SOFTRESET_REG
+#endif
+
+#ifdef CONFIG_BCM63XX_CPU_6358
+static const u32 bcm63xx_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6358)
+};
+#define reset_reg PERF_SOFTRESET_6358_REG
+#endif
+
+#ifdef CONFIG_BCM63XX_CPU_6368
+static const u32 bcm63xx_reset_bits[] = {
+ __GEN_RESET_BITS_TABLE(6368)
+};
+#define reset_reg PERF_SOFTRESET_6368_REG
+#endif
+
+static int __init bcm63xx_reset_bits_init(void) { return 0; }
+#endif
+
+static DEFINE_SPINLOCK(reset_mutex);
+
+static void __bcm63xx_core_set_reset(u32 mask, int enable)
+{
+ unsigned long flags;
+ u32 val;
+
+ if (!mask)
+ return;
+
+ spin_lock_irqsave(&reset_mutex, flags);
+ val = bcm_perf_readl(reset_reg);
+
+ if (enable)
+ val &= ~mask;
+ else
+ val |= mask;
+
+ bcm_perf_writel(val, reset_reg);
+ spin_unlock_irqrestore(&reset_mutex, flags);
+}
+
+void bcm63xx_core_set_reset(enum bcm63xx_core_reset core, int reset)
+{
+ __bcm63xx_core_set_reset(bcm63xx_reset_bits[core], reset);
+}
+EXPORT_SYMBOL(bcm63xx_core_set_reset);
+
+postcore_initcall(bcm63xx_reset_bits_init);