PCI: dwc: hisi: Remove non-ECAM HiSilicon hip05/hip06 driver

The HiSilicon non-ECAM PCIe has been broken since March 2016 commit
7e57fd1 ("PCI: designware: Move Root Complex setup code to
dw_pcie_setup_rc()"). The reason is this commit moved the iATU setup code
from dw_pcie_host_init() to dw_pcie_setup_rc(), but the hisi driver never
calls dw_pcie_setup_rc(). The result is the PCI memory space is never
configured and the driver can't work. It's also clear it has an iATU as
the config space accesses use it.

There's also no dts file using either "hisilicon,hip05-pcie" or
"hisilicon,hip06-pcie".

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Rob Herring <[email protected]>
Signed-off-by: Lorenzo Pieralisi <[email protected]>
Cc: Zhou Wang <[email protected]>
Cc: Lorenzo Pieralisi <[email protected]>
Cc: Bjorn Helgaas <[email protected]>

Author: robherring

drivers/pci/controller/dwc/pcie-hisi.c

@@ -10,15 +10,10 @@
  */
 #include <linux/interrupt.h>
 #include <linux/init.h>
-#include <linux/mfd/syscon.h>
-#include <linux/of_address.h>
-#include <linux/of_pci.h>
 #include <linux/platform_device.h>
-#include <linux/of_device.h>
 #include <linux/pci.h>
 #include <linux/pci-acpi.h>
 #include <linux/pci-ecam.h>
-#include <linux/regmap.h>
 #include "../../pci.h"
 
 #if defined(CONFIG_PCI_HISI) || (defined(CONFIG_ACPI) && defined(CONFIG_PCI_QUIRKS))
@@ -118,220 +113,6 @@ const struct pci_ecam_ops hisi_pcie_ops = {
 
 #ifdef CONFIG_PCI_HISI
 
-#include "pcie-designware.h"
-
-#define PCIE_SUBCTRL_SYS_STATE4_REG		0x6818
-#define PCIE_HIP06_CTRL_OFF			0x1000
-#define PCIE_SYS_STATE4				(PCIE_HIP06_CTRL_OFF + 0x31c)
-#define PCIE_LTSSM_LINKUP_STATE			0x11
-#define PCIE_LTSSM_STATE_MASK			0x3F
-
-#define to_hisi_pcie(x)	dev_get_drvdata((x)->dev)
-
-struct hisi_pcie;
-
-struct pcie_soc_ops {
-	int (*hisi_pcie_link_up)(struct hisi_pcie *hisi_pcie);
-};
-
-struct hisi_pcie {
-	struct dw_pcie *pci;
-	struct regmap *subctrl;
-	u32 port_id;
-	const struct pcie_soc_ops *soc_ops;
-};
-
-/* HipXX PCIe host only supports 32-bit config access */
-static int hisi_pcie_cfg_read(struct pcie_port *pp, int where, int size,
-			      u32 *val)
-{
-	u32 reg;
-	u32 reg_val;
-	void *walker = &reg_val;
-	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
-	walker += (where & 0x3);
-	reg = where & ~0x3;
-	reg_val = dw_pcie_readl_dbi(pci, reg);
-
-	if (size == 1)
-		*val = *(u8 __force *) walker;
-	else if (size == 2)
-		*val = *(u16 __force *) walker;
-	else if (size == 4)
-		*val = reg_val;
-	else
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-/* HipXX PCIe host only supports 32-bit config access */
-static int hisi_pcie_cfg_write(struct pcie_port *pp, int where, int  size,
-				u32 val)
-{
-	u32 reg_val;
-	u32 reg;
-	void *walker = &reg_val;
-	struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
-
-	walker += (where & 0x3);
-	reg = where & ~0x3;
-	if (size == 4)
-		dw_pcie_writel_dbi(pci, reg, val);
-	else if (size == 2) {
-		reg_val = dw_pcie_readl_dbi(pci, reg);
-		*(u16 __force *) walker = val;
-		dw_pcie_writel_dbi(pci, reg, reg_val);
-	} else if (size == 1) {
-		reg_val = dw_pcie_readl_dbi(pci, reg);
-		*(u8 __force *) walker = val;
-		dw_pcie_writel_dbi(pci, reg, reg_val);
-	} else
-		return PCIBIOS_BAD_REGISTER_NUMBER;
-
-	return PCIBIOS_SUCCESSFUL;
-}
-
-static int hisi_pcie_link_up_hip05(struct hisi_pcie *hisi_pcie)
-{
-	u32 val;
-
-	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_link_up_hip06(struct hisi_pcie *hisi_pcie)
-{
-	struct dw_pcie *pci = hisi_pcie->pci;
-	u32 val;
-
-	val = dw_pcie_readl_dbi(pci, PCIE_SYS_STATE4);
-
-	return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE);
-}
-
-static int hisi_pcie_link_up(struct dw_pcie *pci)
-{
-	struct hisi_pcie *hisi_pcie = to_hisi_pcie(pci);
-
-	return hisi_pcie->soc_ops->hisi_pcie_link_up(hisi_pcie);
-}
-
-static const struct dw_pcie_host_ops hisi_pcie_host_ops = {
-	.rd_own_conf = hisi_pcie_cfg_read,
-	.wr_own_conf = hisi_pcie_cfg_write,
-};
-
-static int hisi_add_pcie_port(struct hisi_pcie *hisi_pcie,
-			      struct platform_device *pdev)
-{
-	struct dw_pcie *pci = hisi_pcie->pci;
-	struct pcie_port *pp = &pci->pp;
-	struct device *dev = &pdev->dev;
-	int ret;
-	u32 port_id;
-
-	if (of_property_read_u32(dev->of_node, "port-id", &port_id)) {
-		dev_err(dev, "failed to read port-id\n");
-		return -EINVAL;
-	}
-	if (port_id > 3) {
-		dev_err(dev, "Invalid port-id: %d\n", port_id);
-		return -EINVAL;
-	}
-	hisi_pcie->port_id = port_id;
-
-	pp->ops = &hisi_pcie_host_ops;
-
-	ret = dw_pcie_host_init(pp);
-	if (ret) {
-		dev_err(dev, "failed to initialize host\n");
-		return ret;
-	}
-
-	return 0;
-}
-
-static const struct dw_pcie_ops dw_pcie_ops = {
-	.link_up = hisi_pcie_link_up,
-};
-
-static int hisi_pcie_probe(struct platform_device *pdev)
-{
-	struct device *dev = &pdev->dev;
-	struct dw_pcie *pci;
-	struct hisi_pcie *hisi_pcie;
-	struct resource *reg;
-	int ret;
-
-	hisi_pcie = devm_kzalloc(dev, sizeof(*hisi_pcie), GFP_KERNEL);
-	if (!hisi_pcie)
-		return -ENOMEM;
-
-	pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
-	if (!pci)
-		return -ENOMEM;
-
-	pci->dev = dev;
-	pci->ops = &dw_pcie_ops;
-
-	hisi_pcie->pci = pci;
-
-	hisi_pcie->soc_ops = of_device_get_match_data(dev);
-
-	hisi_pcie->subctrl =
-	    syscon_regmap_lookup_by_compatible("hisilicon,pcie-sas-subctrl");
-	if (IS_ERR(hisi_pcie->subctrl)) {
-		dev_err(dev, "cannot get subctrl base\n");
-		return PTR_ERR(hisi_pcie->subctrl);
-	}
-
-	reg = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rc_dbi");
-	pci->dbi_base = devm_pci_remap_cfg_resource(dev, reg);
-	if (IS_ERR(pci->dbi_base))
-		return PTR_ERR(pci->dbi_base);
-	platform_set_drvdata(pdev, hisi_pcie);
-
-	ret = hisi_add_pcie_port(hisi_pcie, pdev);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
-static struct pcie_soc_ops hip05_ops = {
-		&hisi_pcie_link_up_hip05
-};
-
-static struct pcie_soc_ops hip06_ops = {
-		&hisi_pcie_link_up_hip06
-};
-
-static const struct of_device_id hisi_pcie_of_match[] = {
-	{
-			.compatible = "hisilicon,hip05-pcie",
-			.data	    = (void *) &hip05_ops,
-	},
-	{
-			.compatible = "hisilicon,hip06-pcie",
-			.data	    = (void *) &hip06_ops,
-	},
-	{},
-};
-
-static struct platform_driver hisi_pcie_driver = {
-	.probe  = hisi_pcie_probe,
-	.driver = {
-		   .name = "hisi-pcie",
-		   .of_match_table = hisi_pcie_of_match,
-		   .suppress_bind_attrs = true,
-	},
-};
-builtin_platform_driver(hisi_pcie_driver);
-
 static int hisi_pcie_platform_init(struct pci_config_window *cfg)
 {
 	struct device *dev = cfg->parent;