diff options
Diffstat (limited to 'drivers/pci/host/pcie-hisi.c')
| -rw-r--r-- | drivers/pci/host/pcie-hisi.c | 76 |
1 files changed, 65 insertions, 11 deletions
diff --git a/drivers/pci/host/pcie-hisi.c b/drivers/pci/host/pcie-hisi.c index 77f7c669a1b9..3e98d4edae2d 100644 --- a/drivers/pci/host/pcie-hisi.c +++ b/drivers/pci/host/pcie-hisi.c @@ -1,10 +1,11 @@ /* - * PCIe host controller driver for HiSilicon Hip05 SoC + * PCIe host controller driver for HiSilicon SoCs * * Copyright (C) 2015 HiSilicon Co., Ltd. http://www.hisilicon.com * - * Author: Zhou Wang <wangzhou1@hisilicon.com> - * Dacai Zhu <zhudacai@hisilicon.com> + * Authors: Zhou Wang <wangzhou1@hisilicon.com> + * Dacai Zhu <zhudacai@hisilicon.com> + * Gabriele Paoloni <gabriele.paoloni@huawei.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 @@ -16,21 +17,31 @@ #include <linux/of_address.h> #include <linux/of_pci.h> #include <linux/platform_device.h> +#include <linux/of_device.h> #include <linux/regmap.h> #include "pcie-designware.h" -#define PCIE_SUBCTRL_SYS_STATE4_REG 0x6818 -#define PCIE_LTSSM_LINKUP_STATE 0x11 -#define PCIE_LTSSM_STATE_MASK 0x3F +#define PCIE_LTSSM_LINKUP_STATE 0x11 +#define PCIE_LTSSM_STATE_MASK 0x3F +#define PCIE_SUBCTRL_SYS_STATE4_REG 0x6818 +#define PCIE_SYS_STATE4 0x31c +#define PCIE_HIP06_CTRL_OFF 0x1000 #define to_hisi_pcie(x) container_of(x, struct hisi_pcie, pp) +struct hisi_pcie; + +struct pcie_soc_ops { + int (*hisi_pcie_link_up)(struct hisi_pcie *pcie); +}; + struct hisi_pcie { struct regmap *subctrl; void __iomem *reg_base; u32 port_id; struct pcie_port pp; + struct pcie_soc_ops *soc_ops; }; static inline void hisi_pcie_apb_writel(struct hisi_pcie *pcie, @@ -44,7 +55,7 @@ static inline u32 hisi_pcie_apb_readl(struct hisi_pcie *pcie, u32 reg) return readl(pcie->reg_base + reg); } -/* Hip05 PCIe host only supports 32-bit config access */ +/* 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) { @@ -69,7 +80,7 @@ static int hisi_pcie_cfg_read(struct pcie_port *pp, int where, int size, return PCIBIOS_SUCCESSFUL; } -/* Hip05 PCIe host only supports 32-bit config access */ +/* 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) { @@ -96,10 +107,9 @@ static int hisi_pcie_cfg_write(struct pcie_port *pp, int where, int size, return PCIBIOS_SUCCESSFUL; } -static int hisi_pcie_link_up(struct pcie_port *pp) +static int hisi_pcie_link_up_hip05(struct hisi_pcie *hisi_pcie) { 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); @@ -107,6 +117,23 @@ static int hisi_pcie_link_up(struct pcie_port *pp) return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE); } +static int hisi_pcie_link_up_hip06(struct hisi_pcie *hisi_pcie) +{ + u32 val; + + val = hisi_pcie_apb_readl(hisi_pcie, PCIE_HIP06_CTRL_OFF + + PCIE_SYS_STATE4); + + return ((val & PCIE_LTSSM_STATE_MASK) == PCIE_LTSSM_LINKUP_STATE); +} + +static int hisi_pcie_link_up(struct pcie_port *pp) +{ + struct hisi_pcie *hisi_pcie = to_hisi_pcie(pp); + + return hisi_pcie->soc_ops->hisi_pcie_link_up(hisi_pcie); +} + static struct pcie_host_ops hisi_pcie_host_ops = { .rd_own_conf = hisi_pcie_cfg_read, .wr_own_conf = hisi_pcie_cfg_write, @@ -145,7 +172,9 @@ static int hisi_pcie_probe(struct platform_device *pdev) { struct hisi_pcie *hisi_pcie; struct pcie_port *pp; + const struct of_device_id *match; struct resource *reg; + struct device_driver *driver; int ret; hisi_pcie = devm_kzalloc(&pdev->dev, sizeof(*hisi_pcie), GFP_KERNEL); @@ -154,6 +183,10 @@ static int hisi_pcie_probe(struct platform_device *pdev) pp = &hisi_pcie->pp; pp->dev = &pdev->dev; + driver = (pdev->dev).driver; + + match = of_match_device(driver->of_match_table, &pdev->dev); + hisi_pcie->soc_ops = (struct pcie_soc_ops *) match->data; hisi_pcie->subctrl = syscon_regmap_lookup_by_compatible("hisilicon,pcie-sas-subctrl"); @@ -182,11 +215,27 @@ static int hisi_pcie_probe(struct platform_device *pdev) 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",}, + { + .compatible = "hisilicon,hip05-pcie", + .data = (void *) &hip05_ops, + }, + { + .compatible = "hisilicon,hip06-pcie", + .data = (void *) &hip06_ops, + }, {}, }; + MODULE_DEVICE_TABLE(of, hisi_pcie_of_match); static struct platform_driver hisi_pcie_driver = { @@ -198,3 +247,8 @@ static struct platform_driver hisi_pcie_driver = { }; module_platform_driver(hisi_pcie_driver); + +MODULE_AUTHOR("Zhou Wang <wangzhou1@hisilicon.com>"); +MODULE_AUTHOR("Dacai Zhu <zhudacai@hisilicon.com>"); +MODULE_AUTHOR("Gabriele Paoloni <gabriele.paoloni@huawei.com>"); +MODULE_LICENSE("GPL v2"); |