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Message-Id: <20200519203419.12369-5-james.quinlan@broadcom.com>
Date: Tue, 19 May 2020 16:34:02 -0400
From: Jim Quinlan <james.quinlan@...adcom.com>
To: james.quinlan@...adcom.com,
Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc: Jim Quinlan <james.quinlan@...adcom.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
Rob Herring <robh@...nel.org>,
Bjorn Helgaas <bhelgaas@...gle.com>,
Florian Fainelli <f.fainelli@...il.com>,
bcm-kernel-feedback-list@...adcom.com (maintainer:BROADCOM BCM7XXX ARM
ARCHITECTURE),
linux-rpi-kernel@...ts.infradead.org (moderated list:BROADCOM
BCM2711/BCM2835 ARM ARCHITECTURE),
linux-arm-kernel@...ts.infradead.org (moderated list:BROADCOM
BCM2711/BCM2835 ARM ARCHITECTURE),
linux-pci@...r.kernel.org (open list:PCI NATIVE HOST BRIDGE AND
ENDPOINT DRIVERS), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 04/15] PCI: brcmstb: Add compatibily of other chips
From: Jim Quinlan <jquinlan@...adcom.com>
Add in compatibility strings and code for three Broadcom STB chips.
Some of the register locations, shifts, and masks are different
for certain chips, requiring the use of different constants based
on of_id.
We would like to add the following at this time to the match list
but we need to wait until the end of this patchset so that
everything works.
{ .compatible = "brcm,bcm7211-pcie", .data = &generic_cfg },
{ .compatible = "brcm,bcm7278-pcie", .data = &bcm7278_cfg },
{ .compatible = "brcm,bcm7216-pcie", .data = &bcm7278_cfg },
{ .compatible = "brcm,bcm7445-pcie", .data = &generic_cfg },
Signed-off-by: Jim Quinlan <jquinlan@...adcom.com>
---
drivers/pci/controller/pcie-brcmstb.c | 103 +++++++++++++++++++++++---
1 file changed, 91 insertions(+), 12 deletions(-)
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
index 73020b4ff090..c1cf4ea7d3d9 100644
--- a/drivers/pci/controller/pcie-brcmstb.c
+++ b/drivers/pci/controller/pcie-brcmstb.c
@@ -120,9 +120,8 @@
#define PCIE_EXT_SLOT_SHIFT 15
#define PCIE_EXT_FUNC_SHIFT 12
-#define PCIE_RGR1_SW_INIT_1 0x9210
#define PCIE_RGR1_SW_INIT_1_PERST_MASK 0x1
-#define PCIE_RGR1_SW_INIT_1_INIT_MASK 0x2
+#define PCIE_RGR1_SW_INIT_1_PERST_SHIFT 0x0
/* PCIe parameters */
#define BRCM_NUM_PCIE_OUT_WINS 0x4
@@ -152,6 +151,69 @@
#define SSC_STATUS_SSC_MASK 0x400
#define SSC_STATUS_PLL_LOCK_MASK 0x800
+#define IDX_ADDR(pcie) \
+ (pcie->reg_offsets[EXT_CFG_INDEX])
+#define DATA_ADDR(pcie) \
+ (pcie->reg_offsets[EXT_CFG_DATA])
+#define PCIE_RGR1_SW_INIT_1(pcie) \
+ (pcie->reg_offsets[RGR1_SW_INIT_1])
+
+enum {
+ RGR1_SW_INIT_1,
+ EXT_CFG_INDEX,
+ EXT_CFG_DATA,
+};
+
+enum {
+ RGR1_SW_INIT_1_INIT_MASK,
+ RGR1_SW_INIT_1_INIT_SHIFT,
+};
+
+enum pcie_type {
+ GENERIC,
+ BCM7278,
+};
+
+struct pcie_cfg_data {
+ const int *reg_field_info;
+ const int *offsets;
+ const enum pcie_type type;
+};
+
+static const int pcie_reg_field_info[] = {
+ [RGR1_SW_INIT_1_INIT_MASK] = 0x2,
+ [RGR1_SW_INIT_1_INIT_SHIFT] = 0x1,
+};
+
+static const int pcie_reg_field_info_bcm7278[] = {
+ [RGR1_SW_INIT_1_INIT_MASK] = 0x1,
+ [RGR1_SW_INIT_1_INIT_SHIFT] = 0x0,
+};
+
+static const int pcie_offsets[] = {
+ [RGR1_SW_INIT_1] = 0x9210,
+ [EXT_CFG_INDEX] = 0x9000,
+ [EXT_CFG_DATA] = 0x9004,
+};
+
+static const struct pcie_cfg_data generic_cfg = {
+ .reg_field_info = pcie_reg_field_info,
+ .offsets = pcie_offsets,
+ .type = GENERIC,
+};
+
+static const int pcie_offset_bcm7278[] = {
+ [RGR1_SW_INIT_1] = 0xc010,
+ [EXT_CFG_INDEX] = 0x9000,
+ [EXT_CFG_DATA] = 0x9004,
+};
+
+static const struct pcie_cfg_data bcm7278_cfg = {
+ .reg_field_info = pcie_reg_field_info_bcm7278,
+ .offsets = pcie_offset_bcm7278,
+ .type = BCM7278,
+};
+
struct brcm_msi {
struct device *dev;
void __iomem *base;
@@ -176,6 +238,9 @@ struct brcm_pcie {
int gen;
u64 msi_target_addr;
struct brcm_msi *msi;
+ const int *reg_offsets;
+ const int *reg_field_info;
+ enum pcie_type type;
};
/*
@@ -602,20 +667,21 @@ static struct pci_ops brcm_pcie_ops = {
static inline void brcm_pcie_bridge_sw_init_set(struct brcm_pcie *pcie, u32 val)
{
- u32 tmp;
+ u32 tmp, mask = pcie->reg_field_info[RGR1_SW_INIT_1_INIT_MASK];
+ u32 shift = pcie->reg_field_info[RGR1_SW_INIT_1_INIT_SHIFT];
- tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1);
- u32p_replace_bits(&tmp, val, PCIE_RGR1_SW_INIT_1_INIT_MASK);
- writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1);
+ tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1(pcie));
+ tmp = (tmp & ~mask) | ((val << shift) & mask);
+ writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1(pcie));
}
static inline void brcm_pcie_perst_set(struct brcm_pcie *pcie, u32 val)
{
u32 tmp;
- tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1);
+ tmp = readl(pcie->base + PCIE_RGR1_SW_INIT_1(pcie));
u32p_replace_bits(&tmp, val, PCIE_RGR1_SW_INIT_1_PERST_MASK);
- writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1);
+ writel(tmp, pcie->base + PCIE_RGR1_SW_INIT_1(pcie));
}
static inline int brcm_pcie_get_rc_bar2_size_and_offset(struct brcm_pcie *pcie,
@@ -924,10 +990,17 @@ static int brcm_pcie_remove(struct platform_device *pdev)
return 0;
}
+static const struct of_device_id brcm_pcie_match[] = {
+ { .compatible = "brcm,bcm2711-pcie", .data = &generic_cfg },
+ {},
+};
+
static int brcm_pcie_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node, *msi_np;
struct pci_host_bridge *bridge;
+ const struct pcie_cfg_data *data;
+ const struct of_device_id *of_id;
struct brcm_pcie *pcie;
struct pci_bus *child;
struct resource *res;
@@ -937,9 +1010,19 @@ static int brcm_pcie_probe(struct platform_device *pdev)
if (!bridge)
return -ENOMEM;
+ of_id = of_match_node(brcm_pcie_match, np);
+ if (!of_id) {
+ pr_err("failed to look up compatible string\n");
+ return -EINVAL;
+ }
+ data = of_id->data;
+
pcie = pci_host_bridge_priv(bridge);
pcie->dev = &pdev->dev;
pcie->np = np;
+ pcie->reg_offsets = data->offsets;
+ pcie->reg_field_info = data->reg_field_info;
+ pcie->type = data->type;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pcie->base = devm_ioremap_resource(&pdev->dev, res);
@@ -1005,10 +1088,6 @@ static int brcm_pcie_probe(struct platform_device *pdev)
return ret;
}
-static const struct of_device_id brcm_pcie_match[] = {
- { .compatible = "brcm,bcm2711-pcie" },
- {},
-};
MODULE_DEVICE_TABLE(of, brcm_pcie_match);
static struct platform_driver brcm_pcie_driver = {
--
2.17.1
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