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openwrt/target/linux/brcm63xx/patches-3.3/317-MIPS-BCM63XX-Add-PCIe-Support-for-BCM6328.patch
Jonas Gorski 099d5eec06 bcm63xx: add preliminary support for bcm6328 
SVN-Revision: 31878
2012-05-27 13:22:29 +00:00

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From e170282d7d12f4a26f10d4b666b158d24810d2f6 Mon Sep 17 00:00:00 2001
From: Jonas Gorski <jonas.gorski@gmail.com>
Date: Sun, 3 Jul 2011 03:41:02 +0200
Subject: [PATCH 47/79] MIPS: BCM63XX: Add PCIe Support for BCM6328
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
---
arch/mips/pci/ops-bcm63xx.c | 61 +++++++++++++++++++++++
arch/mips/pci/pci-bcm63xx.c | 112 +++++++++++++++++++++++++++++++++++++++++++
arch/mips/pci/pci-bcm63xx.h | 5 ++
3 files changed, 178 insertions(+)
--- a/arch/mips/pci/ops-bcm63xx.c
+++ b/arch/mips/pci/ops-bcm63xx.c
@@ -465,3 +465,64 @@ static void bcm63xx_fixup(struct pci_dev
DECLARE_PCI_FIXUP_ENABLE(PCI_ANY_ID, PCI_ANY_ID, bcm63xx_fixup);
#endif
+
+static int bcm63xx_pcie_can_access(struct pci_bus *bus, int devfn)
+{
+ switch (bus->number) {
+ case PCIE_BUS_BRIDGE:
+ return (PCI_SLOT(devfn) == 0);
+ case PCIE_BUS_DEVICE:
+ if (PCI_SLOT(devfn) == 0)
+ return bcm_pcie_readl(PCIE_DLSTATUS_REG)
+ & DLSTATUS_PHYLINKUP;
+ default:
+ return false;
+ }
+}
+
+static int bcm63xx_pcie_read(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *val)
+{
+ u32 data;
+ u32 reg = where & ~3;
+
+ if (!bcm63xx_pcie_can_access(bus, devfn))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (bus->number == PCIE_BUS_DEVICE)
+ reg += PCIE_DEVICE_OFFSET;
+
+ data = bcm_pcie_readl(reg);
+
+ *val = postprocess_read(data, where, size);
+
+ return PCIBIOS_SUCCESSFUL;
+
+}
+
+static int bcm63xx_pcie_write(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 val)
+{
+ u32 data;
+ u32 reg = where & ~3;
+
+ if (!bcm63xx_pcie_can_access(bus, devfn))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ if (bus->number == PCIE_BUS_DEVICE)
+ reg += PCIE_DEVICE_OFFSET;
+
+
+ data = bcm_pcie_readl(reg);
+
+ data = preprocess_write(data, val, where, size);
+ bcm_pcie_writel(data, reg);
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+
+struct pci_ops bcm63xx_pcie_ops = {
+ .read = bcm63xx_pcie_read,
+ .write = bcm63xx_pcie_write
+};
--- a/arch/mips/pci/pci-bcm63xx.c
+++ b/arch/mips/pci/pci-bcm63xx.c
@@ -10,6 +10,7 @@
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/delay.h>
#include <asm/bootinfo.h>
#include "pci-bcm63xx.h"
@@ -65,6 +66,26 @@ struct pci_controller bcm63xx_cb_control
};
#endif
+static struct resource bcm_pcie_mem_resource = {
+ .name = "bcm63xx PCIe memory space",
+ .start = BCM_PCIE_MEM_BASE_PA,
+ .end = BCM_PCIE_MEM_END_PA,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct resource bcm_pcie_io_resource = {
+ .name = "bcm63xx PCIe IO space",
+ .start = 0,
+ .end = 0,
+ .flags = 0,
+};
+
+struct pci_controller bcm63xx_pcie_controller = {
+ .pci_ops = &bcm63xx_pcie_ops,
+ .io_resource = &bcm_pcie_io_resource,
+ .mem_resource = &bcm_pcie_mem_resource,
+};
+
static u32 bcm63xx_int_cfg_readl(u32 reg)
{
u32 tmp;
@@ -88,6 +109,95 @@ static void bcm63xx_int_cfg_writel(u32 v
void __iomem *pci_iospace_start;
+static void __init bcm63xx_reset_pcie(void)
+{
+ u32 val;
+
+ /* enable clock */
+ val = bcm_perf_readl(PERF_CKCTL_REG);
+ val |= CKCTL_6328_PCIE_EN;
+ bcm_perf_writel(val, PERF_CKCTL_REG);
+
+ /* enable SERDES */
+ val = bcm_misc_readl(MISC_SERDES_CTRL_REG);
+ val |= SERDES_PCIE_EN | SERDES_PCIE_EXD_EN;
+ bcm_misc_writel(val, MISC_SERDES_CTRL_REG);
+
+ /* reset the PCIe core */
+ val = bcm_perf_readl(PERF_SOFTRESET_6328_REG);
+
+ val &= ~SOFTRESET_6328_PCIE_MASK;
+ val &= ~SOFTRESET_6328_PCIE_CORE_MASK;
+ val &= ~SOFTRESET_6328_PCIE_HARD_MASK;
+ val &= ~SOFTRESET_6328_PCIE_EXT_MASK;
+ bcm_perf_writel(val, PERF_SOFTRESET_6328_REG);
+ mdelay(10);
+
+ val |= SOFTRESET_6328_PCIE_MASK;
+ val |= SOFTRESET_6328_PCIE_CORE_MASK;
+ val |= SOFTRESET_6328_PCIE_HARD_MASK;
+ bcm_perf_writel(val, PERF_SOFTRESET_6328_REG);
+ mdelay(10);
+
+ val |= SOFTRESET_6328_PCIE_EXT_MASK;
+ bcm_perf_writel(val, PERF_SOFTRESET_6328_REG);
+ mdelay(200);
+}
+
+static int __init bcm63xx_register_pcie(void)
+{
+ u32 val;
+
+ bcm63xx_reset_pcie();
+
+ /* configure the PCIe bridge */
+ val = bcm_pcie_readl(PCIE_BRIDGE_OPT1_REG);
+ val |= OPT1_RD_BE_OPT_EN;
+ val |= OPT1_RD_REPLY_BE_FIX_EN;
+ val |= OPT1_PCIE_BRIDGE_HOLE_DET_EN;
+ val |= OPT1_L1_INT_STATUS_MASK_POL;
+ bcm_pcie_writel(val, PCIE_BRIDGE_OPT1_REG);
+
+ /* setup the interrupts */
+ val = bcm_pcie_readl(PCIE_BRIDGE_RC_INT_MASK_REG);
+ val |= PCIE_RC_INT_A | PCIE_RC_INT_B | PCIE_RC_INT_C | PCIE_RC_INT_D;
+ bcm_pcie_writel(val, PCIE_BRIDGE_RC_INT_MASK_REG);
+
+ val = bcm_pcie_readl(PCIE_BRIDGE_OPT2_REG);
+ /* enable credit checking and error checking */
+ val |= OPT2_TX_CREDIT_CHK_EN;
+ val |= OPT2_UBUS_UR_DECODE_DIS;
+
+ /* set device bus/func for the pcie device */
+ val |= (PCIE_BUS_DEVICE << OPT2_CFG_TYPE1_BUS_NO_SHIFT);
+ val |= OPT2_CFG_TYPE1_BD_SEL;
+ bcm_pcie_writel(val, PCIE_BRIDGE_OPT2_REG);
+
+ /* setup class code as bridge */
+ val = bcm_pcie_readl(PCIE_IDVAL3_REG);
+ val &= ~IDVAL3_CLASS_CODE_MASK;
+ val |= (PCI_CLASS_BRIDGE_PCI << IDVAL3_SUBCLASS_SHIFT);
+ bcm_pcie_writel(val, PCIE_IDVAL3_REG);
+
+ /* disable bar1 size */
+ val = bcm_pcie_readl(PCIE_CONFIG2_REG);
+ val &= ~CONFIG2_BAR1_SIZE_MASK;
+ bcm_pcie_writel(val, PCIE_CONFIG2_REG);
+
+ /* set bar0 to little endian */
+ val = (BCM_PCIE_MEM_BASE_PA >> 20) << BASEMASK_BASE_SHIFT;
+ val |= (BCM_PCIE_MEM_BASE_PA >> 20) << BASEMASK_MASK_SHIFT;
+ val |= BASEMASK_REMAP_EN;
+ bcm_pcie_writel(val, PCIE_BRIDGE_BAR0_BASEMASK_REG);
+
+ val = (BCM_PCIE_MEM_BASE_PA >> 20) << REBASE_ADDR_BASE_SHIFT;
+ bcm_pcie_writel(val, PCIE_BRIDGE_BAR0_REBASE_ADDR_REG);
+
+ register_pci_controller(&bcm63xx_pcie_controller);
+
+ return 0;
+}
+
static int __init bcm63xx_register_pci(void)
{
unsigned int mem_size;
@@ -211,6 +321,8 @@ static int __init bcm63xx_register_pci(v
int __init bcm63xx_pci_register(void)
{
switch (bcm63xx_get_cpu_id()) {
+ case BCM6328_CPU_ID:
+ return bcm63xx_register_pcie();
case BCM6348_CPU_ID:
case BCM6358_CPU_ID:
case BCM6368_CPU_ID:
--- a/arch/mips/pci/pci-bcm63xx.h
+++ b/arch/mips/pci/pci-bcm63xx.h
@@ -13,11 +13,16 @@
*/
#define CARDBUS_PCI_IDSEL 0x8
+
+#define PCIE_BUS_BRIDGE 0
+#define PCIE_BUS_DEVICE 1
+
/*
* defined in ops-bcm63xx.c
*/
extern struct pci_ops bcm63xx_pci_ops;
extern struct pci_ops bcm63xx_cb_ops;
+extern struct pci_ops bcm63xx_pcie_ops;
/*
* defined in pci-bcm63xx.c
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