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From af14a456c58c153c6d761e6c0af48157692b52ad Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Fri, 9 Nov 2012 13:43:30 +0100
Subject: [PATCH 5/6] MIPS: lantiq: adds code for booting GPHY
The XRX200 family of SoCs has embedded gigabit PHYs. This patch adds code to
boot them up.
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4522
---
.../mips/include/asm/mach-lantiq/xway/lantiq_soc.h | 3 ++
arch/mips/lantiq/xway/reset.c | 36 ++++++++++++++++++++
2 files changed, 39 insertions(+)
--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
@@ -82,6 +82,9 @@ extern __iomem void *ltq_cgu_membase;
#define LTQ_MPS_BASE_ADDR (KSEG1 + 0x1F107000)
#define LTQ_MPS_CHIPID ((u32 *)(LTQ_MPS_BASE_ADDR + 0x0344))
+/* allow booting xrx200 phys */
+int xrx200_gphy_boot(struct device *dev, unsigned int id, dma_addr_t dev_addr);
+
/* request a non-gpio and set the PIO config */
#define PMU_PPE BIT(13)
extern void ltq_pmu_enable(unsigned int module);
--- a/arch/mips/lantiq/xway/reset.c
+++ b/arch/mips/lantiq/xway/reset.c
@@ -28,9 +28,15 @@
#define RCU_RST_REQ 0x0010
/* reset status register */
#define RCU_RST_STAT 0x0014
+/* vr9 gphy registers */
+#define RCU_GFS_ADD0_XRX200 0x0020
+#define RCU_GFS_ADD1_XRX200 0x0068
/* reboot bit */
+#define RCU_RD_GPHY0_XRX200 BIT(31)
#define RCU_RD_SRST BIT(30)
+#define RCU_RD_GPHY1_XRX200 BIT(29)
+
/* reset cause */
#define RCU_STAT_SHIFT 26
/* boot selection */
@@ -60,6 +66,36 @@ unsigned char ltq_boot_select(void)
return RCU_BOOT_SEL(val);
}
+/* reset / boot a gphy */
+static struct ltq_xrx200_gphy_reset {
+ u32 rd;
+ u32 addr;
+} xrx200_gphy[] = {
+ {RCU_RD_GPHY0_XRX200, RCU_GFS_ADD0_XRX200},
+ {RCU_RD_GPHY1_XRX200, RCU_GFS_ADD1_XRX200},
+};
+
+/* reset and boot a gphy. these phys only exist on xrx200 SoC */
+int xrx200_gphy_boot(struct device *dev, unsigned int id, dma_addr_t dev_addr)
+{
+ if (!of_device_is_compatible(ltq_rcu_np, "lantiq,rcu-xrx200")) {
+ dev_err(dev, "this SoC has no GPHY\n");
+ return -EINVAL;
+ }
+ if (id > 1) {
+ dev_err(dev, "%u is an invalid gphy id\n", id);
+ return -EINVAL;
+ }
+ dev_info(dev, "booting GPHY%u firmware at %X\n", id, dev_addr);
+
+ ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) | xrx200_gphy[id].rd,
+ RCU_RST_REQ);
+ ltq_rcu_w32(dev_addr, xrx200_gphy[id].addr);
+ ltq_rcu_w32(ltq_rcu_r32(RCU_RST_REQ) & ~xrx200_gphy[id].rd,
+ RCU_RST_REQ);
+ return 0;
+}
+
/* reset a io domain for u micro seconds */
void ltq_reset_once(unsigned int module, ulong u)
{
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