[PATCH v10 4/6] PCI: hisi: Add PCIe host support for HiSilicon SoC Hip05
Zhou Wang
wangzhou1 at hisilicon.com
Fri Oct 9 19:59:15 PDT 2015
This patch adds PCIe host support for HiSilicon SoC Hip05.
Signed-off-by: Zhou Wang <wangzhou1 at hisilicon.com>
Signed-off-by: Gabriele Paoloni <gabriele.paoloni at huawei.com>
Signed-off-by: liudongdong <liudongdong3 at huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang at huawei.com>
Signed-off-by: qiuzhenfa <qiuzhenfa at hisilicon.com>
---
drivers/pci/host/Kconfig | 8 ++
drivers/pci/host/Makefile | 1 +
drivers/pci/host/pcie-hisi.c | 320 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 329 insertions(+)
create mode 100644 drivers/pci/host/pcie-hisi.c
diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index d5e58ba..ae873be 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -145,4 +145,12 @@ config PCIE_IPROC_BCMA
Say Y here if you want to use the Broadcom iProc PCIe controller
through the BCMA bus interface
+config PCI_HISI
+ depends on OF && ARM64
+ bool "HiSilicon SoC HIP05 PCIe controller"
+ select PCIEPORTBUS
+ select PCIE_DW
+ help
+ Say Y here if you want PCIe controller support on HiSilicon HIP05 SoC
+
endmenu
diff --git a/drivers/pci/host/Makefile b/drivers/pci/host/Makefile
index 140d66f..ea1dbf2 100644
--- a/drivers/pci/host/Makefile
+++ b/drivers/pci/host/Makefile
@@ -17,3 +17,4 @@ obj-$(CONFIG_PCI_VERSATILE) += pci-versatile.o
obj-$(CONFIG_PCIE_IPROC) += pcie-iproc.o
obj-$(CONFIG_PCIE_IPROC_PLATFORM) += pcie-iproc-platform.o
obj-$(CONFIG_PCIE_IPROC_BCMA) += pcie-iproc-bcma.o
+obj-$(CONFIG_PCI_HISI) += pcie-hisi.o
diff --git a/drivers/pci/host/pcie-hisi.c b/drivers/pci/host/pcie-hisi.c
new file mode 100644
index 0000000..26aa0d9
--- /dev/null
+++ b/drivers/pci/host/pcie-hisi.c
@@ -0,0 +1,320 @@
+/*
+ * PCIe host controller driver for HiSilicon Hip05 SoC
+ *
+ * Copyright (C) 2015 HiSilicon Co., Ltd. http://www.hisilicon.com
+ *
+ * Author: Zhou Wang <wangzhou1 at hisilicon.com>
+ * Dacai Zhu <zhudacai at hisilicon.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_pci.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include "pcie-designware.h"
+
+#define PCIE_SUBCTRL_MODE_REG 0x2800
+#define PCIE_SUBCTRL_SYS_STATE4_REG 0x6818
+#define PCIE_SLV_DBI_MODE 0x0
+#define PCIE_SLV_SYSCTRL_MODE 0x1
+#define PCIE_SLV_CONTENT_MODE 0x2
+#define PCIE_SLV_MSI_ASID 0x10
+#define PCIE_LTSSM_LINKUP_STATE 0x11
+#define PCIE_LTSSM_STATE_MASK 0x3F
+#define PCIE_MSI_ASID_ENABLE (0x1 << 12)
+#define PCIE_MSI_ASID_VALUE (0x1 << 16)
+#define PCIE_MSI_TRANS_ENABLE (0x1 << 12)
+#define PCIE_MSI_TRANS_REG 0x1c8
+#define PCIE_MSI_LOW_ADDRESS 0x1b4
+#define PCIE_MSI_HIGH_ADDRESS 0x1c4
+#define PCIE_GITS_TRANSLATER 0x10040
+
+#define PCIE_SYS_CTRL20_REG 0x20
+#define PCIE_RD_TAB_SEL BIT(31)
+#define PCIE_RD_TAB_EN BIT(30)
+
+#define to_hisi_pcie(x) container_of(x, struct hisi_pcie, pp)
+
+struct hisi_pcie {
+ struct regmap *subctrl;
+ void __iomem *reg_base;
+ u32 port_id;
+ struct pcie_port pp;
+};
+
+static inline void hisi_pcie_apb_writel(struct hisi_pcie *pcie,
+ u32 val, u32 reg)
+{
+ writel(val, pcie->reg_base + reg);
+}
+
+static inline u32 hisi_pcie_apb_readl(struct hisi_pcie *pcie, u32 reg)
+{
+ return readl(pcie->reg_base + reg);
+}
+
+/*
+ * Change mode to indicate the same reg_base to base of PCIe host configure
+ * registers, base of RC configure space or base of vmid/asid context table
+ */
+static void hisi_pcie_change_apb_mode(struct hisi_pcie *pcie, u32 mode)
+{
+ u32 val;
+ u32 bit_mask;
+ u32 bit_shift;
+ u32 port_id = pcie->port_id;
+ u32 reg = PCIE_SUBCTRL_MODE_REG + 0x100 * port_id;
+
+ if ((port_id == 1) || (port_id == 2)) {
+ bit_mask = 0xc;
+ bit_shift = 0x2;
+ } else {
+ bit_mask = 0x6;
+ bit_shift = 0x1;
+ }
+
+ regmap_update_bits(pcie->subctrl, reg, bit_mask, mode << bit_shift);
+}
+
+/* Configure vmid/asid table in PCIe host */
+static void hisi_pcie_config_context(struct hisi_pcie *pcie)
+{
+ int i;
+ u32 val;
+
+ /* enable to clean vmid and asid tables though apb bus */
+ hisi_pcie_change_apb_mode(pcie, PCIE_SLV_SYSCTRL_MODE);
+
+ val = hisi_pcie_apb_readl(pcie, PCIE_SYS_CTRL20_REG);
+ /* enable ar channel */
+ val |= PCIE_RD_TAB_SEL | PCIE_RD_TAB_EN;
+ hisi_pcie_apb_writel(pcie, val, PCIE_SYS_CTRL20_REG);
+
+ hisi_pcie_change_apb_mode(pcie, PCIE_SLV_CONTENT_MODE);
+
+ /*
+ * init vmid and asid tables for all PCIe devices as 0
+ * vmid table: 0 ~ 0x3ff, asid table: 0x400 ~ 0x7ff
+ */
+ for (i = 0; i < 0x800; i++)
+ hisi_pcie_apb_writel(pcie, 0x0, i * 4);
+
+ hisi_pcie_change_apb_mode(pcie, PCIE_SLV_SYSCTRL_MODE);
+
+ /* enable aw channel */
+ val &= (~PCIE_RD_TAB_SEL);
+ val |= PCIE_RD_TAB_EN;
+ hisi_pcie_apb_writel(pcie, val, PCIE_SYS_CTRL20_REG);
+
+ hisi_pcie_change_apb_mode(pcie, PCIE_SLV_CONTENT_MODE);
+
+ for (i = 0; i < 0x800; i++)
+ hisi_pcie_apb_writel(pcie, 0x0, i * 4);
+
+ hisi_pcie_change_apb_mode(pcie, PCIE_SLV_SYSCTRL_MODE);
+
+ val = hisi_pcie_apb_readl(pcie, PCIE_SYS_CTRL20_REG);
+ /* disable ar channel */
+ val |= PCIE_RD_TAB_SEL;
+ val &= (~PCIE_RD_TAB_EN);
+ hisi_pcie_apb_writel(pcie, val, PCIE_SYS_CTRL20_REG);
+ /* disable aw channel */
+ val &= ((~PCIE_RD_TAB_SEL) & (~PCIE_RD_TAB_EN));
+ hisi_pcie_apb_writel(pcie, val, PCIE_SYS_CTRL20_REG);
+
+ hisi_pcie_change_apb_mode(pcie, PCIE_SLV_DBI_MODE);
+}
+
+static int hisi_pcie_link_up(struct pcie_port *pp)
+{
+ u32 val;
+ struct hisi_pcie *hisi_pcie = to_hisi_pcie(pp);
+
+ regmap_read(hisi_pcie->subctrl, PCIE_SUBCTRL_SYS_STATE4_REG +
+ 0x100 * hisi_pcie->port_id, &val);
+
+ return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE);
+}
+
+static
+int hisi_pcie_msi_host_init(struct pcie_port *pp, struct msi_controller *chip)
+{
+ u64 addr;
+ struct device_node *msi_node;
+ struct resource res;
+ struct device_node *np = pp->dev->of_node;
+ struct hisi_pcie *pcie = to_hisi_pcie(pp);
+
+ msi_node = of_parse_phandle(np, "msi-parent", 0);
+ if (!msi_node) {
+ dev_err(pp->dev, "failed to find msi-parent\n");
+ return -EINVAL;
+ }
+ of_address_to_resource(msi_node, 0, &res);
+ addr = res.start + PCIE_GITS_TRANSLATER;
+
+ hisi_pcie_change_apb_mode(pcie, PCIE_SLV_SYSCTRL_MODE);
+
+ hisi_pcie_apb_writel(pcie, addr & 0xffffffff, PCIE_MSI_LOW_ADDRESS);
+ hisi_pcie_apb_writel(pcie, addr >> 32, PCIE_MSI_HIGH_ADDRESS);
+ hisi_pcie_apb_writel(pcie, PCIE_MSI_ASID_ENABLE | PCIE_MSI_ASID_VALUE,
+ PCIE_SLV_MSI_ASID);
+ hisi_pcie_apb_writel(pcie, PCIE_MSI_TRANS_ENABLE, PCIE_MSI_TRANS_REG);
+
+ hisi_pcie_change_apb_mode(pcie, PCIE_SLV_DBI_MODE);
+
+ return 0;
+}
+
+static int hisi_pcie_cfg_write(struct pcie_port *pp, int where, int size,
+ u32 val)
+{
+ u32 reg_val;
+ u32 reg;
+ struct hisi_pcie *pcie = to_hisi_pcie(pp);
+ void *walker = ®_val;
+
+ walker += (where & 0x3);
+ reg = where & ~0x3;
+ if (size == 4)
+ hisi_pcie_apb_writel(pcie, val, reg);
+ else if (size == 2) {
+ reg_val = hisi_pcie_apb_readl(pcie, reg);
+ *(u16 __force *) walker = val;
+ hisi_pcie_apb_writel(pcie, reg_val, reg);
+ } else if (size == 1) {
+ reg_val = hisi_pcie_apb_readl(pcie, reg);
+ *(u8 __force *) walker = val;
+ hisi_pcie_apb_writel(pcie, reg_val, reg);
+ } else
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int hisi_pcie_cfg_read(struct pcie_port *pp, int where, int size,
+ u32 *val)
+{
+ u32 reg;
+ u32 reg_val;
+ struct hisi_pcie *pcie = to_hisi_pcie(pp);
+ void *walker = ®_val;
+
+ walker += (where & 0x3);
+ reg = where & ~0x3;
+ reg_val = hisi_pcie_apb_readl(pcie, reg);
+
+ if (size == 1)
+ *val = *(u8 __force *) walker;
+ else if (size == 2)
+ *val = *(u16 __force *) walker;
+ else if (size != 4)
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pcie_host_ops hisi_pcie_host_ops = {
+ .link_up = hisi_pcie_link_up,
+ .msi_host_init = hisi_pcie_msi_host_init,
+ .wr_own_conf = hisi_pcie_cfg_write,
+ .rd_own_conf = hisi_pcie_cfg_read,
+};
+
+static int __init hisi_add_pcie_port(struct pcie_port *pp,
+ struct platform_device *pdev)
+{
+ int ret;
+ u32 port_id;
+ struct hisi_pcie *hisi_pcie = to_hisi_pcie(pp);
+
+ if (of_property_read_u32(pdev->dev.of_node, "port-id", &port_id)) {
+ dev_err(&pdev->dev, "failed to read port-id\n");
+ return -EINVAL;
+ }
+ if (port_id > 3) {
+ dev_err(&pdev->dev, "Invalid port-id: %d\n", port_id);
+ return -EINVAL;
+ }
+ hisi_pcie->port_id = port_id;
+
+ pp->ops = &hisi_pcie_host_ops;
+
+ hisi_pcie_config_context(hisi_pcie);
+
+ ret = dw_pcie_host_init(pp);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize host\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __init hisi_pcie_probe(struct platform_device *pdev)
+{
+ struct hisi_pcie *hisi_pcie;
+ struct pcie_port *pp;
+ struct resource *reg;
+ int ret;
+
+ hisi_pcie = devm_kzalloc(&pdev->dev, sizeof(*hisi_pcie), GFP_KERNEL);
+ if (!hisi_pcie)
+ return -ENOMEM;
+
+ pp = &hisi_pcie->pp;
+ pp->dev = &pdev->dev;
+
+ hisi_pcie->subctrl =
+ syscon_regmap_lookup_by_compatible("hisilicon,pcie-sas-subctrl");
+ if (IS_ERR(hisi_pcie->subctrl)) {
+ dev_err(pp->dev, "cannot get subctrl base\n");
+ return PTR_ERR(hisi_pcie->subctrl);
+ }
+
+ reg = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rc_dbi");
+ hisi_pcie->reg_base = devm_ioremap_resource(&pdev->dev, reg);
+ if (IS_ERR(hisi_pcie->reg_base)) {
+ dev_err(pp->dev, "cannot get rc_dbi base\n");
+ return PTR_ERR(hisi_pcie->reg_base);
+ }
+
+ hisi_pcie->pp.dbi_base = hisi_pcie->reg_base;
+
+ ret = hisi_add_pcie_port(pp, pdev);
+ if (ret)
+ return ret;
+
+ platform_set_drvdata(pdev, hisi_pcie);
+
+ return 0;
+}
+
+static const struct of_device_id hisi_pcie_of_match[] = {
+ {.compatible = "hisilicon,hip05-pcie",},
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, hisi_pcie_of_match);
+
+static struct platform_driver hisi_pcie_driver = {
+ .driver = {
+ .name = "hisi-pcie",
+ .of_match_table = hisi_pcie_of_match,
+ },
+};
+
+static int __init hisi_pcie_init(void)
+{
+ return platform_driver_probe(&hisi_pcie_driver, hisi_pcie_probe);
+}
+subsys_initcall(hisi_pcie_init);
--
1.9.1
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