linuxdebug/drivers/pci/controller/dwc/pcie-kirin.c

835 lines
19 KiB
C
Raw Normal View History

2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* PCIe host controller driver for Kirin Phone SoCs
*
* Copyright (C) 2017 HiSilicon Electronics Co., Ltd.
* https://www.huawei.com
*
* Author: Xiaowei Song <songxiaowei@huawei.com>
*/
#include <linux/clk.h>
#include <linux/compiler.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
#include <linux/mfd/syscon.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/of_pci.h>
#include <linux/phy/phy.h>
#include <linux/pci.h>
#include <linux/pci_regs.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/resource.h>
#include <linux/types.h>
#include "pcie-designware.h"
#define to_kirin_pcie(x) dev_get_drvdata((x)->dev)
/* PCIe ELBI registers */
#define SOC_PCIECTRL_CTRL0_ADDR 0x000
#define SOC_PCIECTRL_CTRL1_ADDR 0x004
#define PCIE_ELBI_SLV_DBI_ENABLE (0x1 << 21)
/* info located in APB */
#define PCIE_APP_LTSSM_ENABLE 0x01c
#define PCIE_APB_PHY_STATUS0 0x400
#define PCIE_LINKUP_ENABLE (0x8020)
#define PCIE_LTSSM_ENABLE_BIT (0x1 << 11)
/* info located in sysctrl */
#define SCTRL_PCIE_CMOS_OFFSET 0x60
#define SCTRL_PCIE_CMOS_BIT 0x10
#define SCTRL_PCIE_ISO_OFFSET 0x44
#define SCTRL_PCIE_ISO_BIT 0x30
#define SCTRL_PCIE_HPCLK_OFFSET 0x190
#define SCTRL_PCIE_HPCLK_BIT 0x184000
#define SCTRL_PCIE_OE_OFFSET 0x14a
#define PCIE_DEBOUNCE_PARAM 0xF0F400
#define PCIE_OE_BYPASS (0x3 << 28)
/*
* Max number of connected PCI slots at an external PCI bridge
*
* This is used on HiKey 970, which has a PEX 8606 bridge with 4 connected
* lanes (lane 0 upstream, and the other three lanes, one connected to an
* in-board Ethernet adapter and the other two connected to M.2 and mini
* PCI slots.
*
* Each slot has a different clock source and uses a separate PERST# pin.
*/
#define MAX_PCI_SLOTS 3
enum pcie_kirin_phy_type {
PCIE_KIRIN_INTERNAL_PHY,
PCIE_KIRIN_EXTERNAL_PHY
};
struct kirin_pcie {
enum pcie_kirin_phy_type type;
struct dw_pcie *pci;
struct regmap *apb;
struct phy *phy;
void *phy_priv; /* only for PCIE_KIRIN_INTERNAL_PHY */
/* DWC PERST# */
int gpio_id_dwc_perst;
/* Per-slot PERST# */
int num_slots;
int gpio_id_reset[MAX_PCI_SLOTS];
const char *reset_names[MAX_PCI_SLOTS];
/* Per-slot clkreq */
int n_gpio_clkreq;
int gpio_id_clkreq[MAX_PCI_SLOTS];
const char *clkreq_names[MAX_PCI_SLOTS];
};
/*
* Kirin 960 PHY. Can't be split into a PHY driver without changing the
* DT schema.
*/
#define REF_CLK_FREQ 100000000
/* PHY info located in APB */
#define PCIE_APB_PHY_CTRL0 0x0
#define PCIE_APB_PHY_CTRL1 0x4
#define PCIE_APB_PHY_STATUS0 0x400
#define PIPE_CLK_STABLE BIT(19)
#define PHY_REF_PAD_BIT BIT(8)
#define PHY_PWR_DOWN_BIT BIT(22)
#define PHY_RST_ACK_BIT BIT(16)
/* peri_crg ctrl */
#define CRGCTRL_PCIE_ASSERT_OFFSET 0x88
#define CRGCTRL_PCIE_ASSERT_BIT 0x8c000000
/* Time for delay */
#define REF_2_PERST_MIN 21000
#define REF_2_PERST_MAX 25000
#define PERST_2_ACCESS_MIN 10000
#define PERST_2_ACCESS_MAX 12000
#define PIPE_CLK_WAIT_MIN 550
#define PIPE_CLK_WAIT_MAX 600
#define TIME_CMOS_MIN 100
#define TIME_CMOS_MAX 105
#define TIME_PHY_PD_MIN 10
#define TIME_PHY_PD_MAX 11
struct hi3660_pcie_phy {
struct device *dev;
void __iomem *base;
struct regmap *crgctrl;
struct regmap *sysctrl;
struct clk *apb_sys_clk;
struct clk *apb_phy_clk;
struct clk *phy_ref_clk;
struct clk *aclk;
struct clk *aux_clk;
};
/* Registers in PCIePHY */
static inline void kirin_apb_phy_writel(struct hi3660_pcie_phy *hi3660_pcie_phy,
u32 val, u32 reg)
{
writel(val, hi3660_pcie_phy->base + reg);
}
static inline u32 kirin_apb_phy_readl(struct hi3660_pcie_phy *hi3660_pcie_phy,
u32 reg)
{
return readl(hi3660_pcie_phy->base + reg);
}
static int hi3660_pcie_phy_get_clk(struct hi3660_pcie_phy *phy)
{
struct device *dev = phy->dev;
phy->phy_ref_clk = devm_clk_get(dev, "pcie_phy_ref");
if (IS_ERR(phy->phy_ref_clk))
return PTR_ERR(phy->phy_ref_clk);
phy->aux_clk = devm_clk_get(dev, "pcie_aux");
if (IS_ERR(phy->aux_clk))
return PTR_ERR(phy->aux_clk);
phy->apb_phy_clk = devm_clk_get(dev, "pcie_apb_phy");
if (IS_ERR(phy->apb_phy_clk))
return PTR_ERR(phy->apb_phy_clk);
phy->apb_sys_clk = devm_clk_get(dev, "pcie_apb_sys");
if (IS_ERR(phy->apb_sys_clk))
return PTR_ERR(phy->apb_sys_clk);
phy->aclk = devm_clk_get(dev, "pcie_aclk");
if (IS_ERR(phy->aclk))
return PTR_ERR(phy->aclk);
return 0;
}
static int hi3660_pcie_phy_get_resource(struct hi3660_pcie_phy *phy)
{
struct device *dev = phy->dev;
struct platform_device *pdev;
/* registers */
pdev = container_of(dev, struct platform_device, dev);
phy->base = devm_platform_ioremap_resource_byname(pdev, "phy");
if (IS_ERR(phy->base))
return PTR_ERR(phy->base);
phy->crgctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3660-crgctrl");
if (IS_ERR(phy->crgctrl))
return PTR_ERR(phy->crgctrl);
phy->sysctrl = syscon_regmap_lookup_by_compatible("hisilicon,hi3660-sctrl");
if (IS_ERR(phy->sysctrl))
return PTR_ERR(phy->sysctrl);
return 0;
}
static int hi3660_pcie_phy_start(struct hi3660_pcie_phy *phy)
{
struct device *dev = phy->dev;
u32 reg_val;
reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_CTRL1);
reg_val &= ~PHY_REF_PAD_BIT;
kirin_apb_phy_writel(phy, reg_val, PCIE_APB_PHY_CTRL1);
reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_CTRL0);
reg_val &= ~PHY_PWR_DOWN_BIT;
kirin_apb_phy_writel(phy, reg_val, PCIE_APB_PHY_CTRL0);
usleep_range(TIME_PHY_PD_MIN, TIME_PHY_PD_MAX);
reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_CTRL1);
reg_val &= ~PHY_RST_ACK_BIT;
kirin_apb_phy_writel(phy, reg_val, PCIE_APB_PHY_CTRL1);
usleep_range(PIPE_CLK_WAIT_MIN, PIPE_CLK_WAIT_MAX);
reg_val = kirin_apb_phy_readl(phy, PCIE_APB_PHY_STATUS0);
if (reg_val & PIPE_CLK_STABLE) {
dev_err(dev, "PIPE clk is not stable\n");
return -EINVAL;
}
return 0;
}
static void hi3660_pcie_phy_oe_enable(struct hi3660_pcie_phy *phy)
{
u32 val;
regmap_read(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, &val);
val |= PCIE_DEBOUNCE_PARAM;
val &= ~PCIE_OE_BYPASS;
regmap_write(phy->sysctrl, SCTRL_PCIE_OE_OFFSET, val);
}
static int hi3660_pcie_phy_clk_ctrl(struct hi3660_pcie_phy *phy, bool enable)
{
int ret = 0;
if (!enable)
goto close_clk;
ret = clk_set_rate(phy->phy_ref_clk, REF_CLK_FREQ);
if (ret)
return ret;
ret = clk_prepare_enable(phy->phy_ref_clk);
if (ret)
return ret;
ret = clk_prepare_enable(phy->apb_sys_clk);
if (ret)
goto apb_sys_fail;
ret = clk_prepare_enable(phy->apb_phy_clk);
if (ret)
goto apb_phy_fail;
ret = clk_prepare_enable(phy->aclk);
if (ret)
goto aclk_fail;
ret = clk_prepare_enable(phy->aux_clk);
if (ret)
goto aux_clk_fail;
return 0;
close_clk:
clk_disable_unprepare(phy->aux_clk);
aux_clk_fail:
clk_disable_unprepare(phy->aclk);
aclk_fail:
clk_disable_unprepare(phy->apb_phy_clk);
apb_phy_fail:
clk_disable_unprepare(phy->apb_sys_clk);
apb_sys_fail:
clk_disable_unprepare(phy->phy_ref_clk);
return ret;
}
static int hi3660_pcie_phy_power_on(struct kirin_pcie *pcie)
{
struct hi3660_pcie_phy *phy = pcie->phy_priv;
int ret;
/* Power supply for Host */
regmap_write(phy->sysctrl,
SCTRL_PCIE_CMOS_OFFSET, SCTRL_PCIE_CMOS_BIT);
usleep_range(TIME_CMOS_MIN, TIME_CMOS_MAX);
hi3660_pcie_phy_oe_enable(phy);
ret = hi3660_pcie_phy_clk_ctrl(phy, true);
if (ret)
return ret;
/* ISO disable, PCIeCtrl, PHY assert and clk gate clear */
regmap_write(phy->sysctrl,
SCTRL_PCIE_ISO_OFFSET, SCTRL_PCIE_ISO_BIT);
regmap_write(phy->crgctrl,
CRGCTRL_PCIE_ASSERT_OFFSET, CRGCTRL_PCIE_ASSERT_BIT);
regmap_write(phy->sysctrl,
SCTRL_PCIE_HPCLK_OFFSET, SCTRL_PCIE_HPCLK_BIT);
ret = hi3660_pcie_phy_start(phy);
if (ret)
goto disable_clks;
return 0;
disable_clks:
hi3660_pcie_phy_clk_ctrl(phy, false);
return ret;
}
static int hi3660_pcie_phy_init(struct platform_device *pdev,
struct kirin_pcie *pcie)
{
struct device *dev = &pdev->dev;
struct hi3660_pcie_phy *phy;
int ret;
phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
if (!phy)
return -ENOMEM;
pcie->phy_priv = phy;
phy->dev = dev;
ret = hi3660_pcie_phy_get_clk(phy);
if (ret)
return ret;
return hi3660_pcie_phy_get_resource(phy);
}
static int hi3660_pcie_phy_power_off(struct kirin_pcie *pcie)
{
struct hi3660_pcie_phy *phy = pcie->phy_priv;
/* Drop power supply for Host */
regmap_write(phy->sysctrl, SCTRL_PCIE_CMOS_OFFSET, 0x00);
hi3660_pcie_phy_clk_ctrl(phy, false);
return 0;
}
/*
* The non-PHY part starts here
*/
static const struct regmap_config pcie_kirin_regmap_conf = {
.name = "kirin_pcie_apb",
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
};
static int kirin_pcie_get_gpio_enable(struct kirin_pcie *pcie,
struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
char name[32];
int ret, i;
/* This is an optional property */
ret = gpiod_count(dev, "hisilicon,clken");
if (ret < 0)
return 0;
if (ret > MAX_PCI_SLOTS) {
dev_err(dev, "Too many GPIO clock requests!\n");
return -EINVAL;
}
pcie->n_gpio_clkreq = ret;
for (i = 0; i < pcie->n_gpio_clkreq; i++) {
pcie->gpio_id_clkreq[i] = of_get_named_gpio(dev->of_node,
"hisilicon,clken-gpios", i);
if (pcie->gpio_id_clkreq[i] < 0)
return pcie->gpio_id_clkreq[i];
sprintf(name, "pcie_clkreq_%d", i);
pcie->clkreq_names[i] = devm_kstrdup_const(dev, name,
GFP_KERNEL);
if (!pcie->clkreq_names[i])
return -ENOMEM;
}
return 0;
}
static int kirin_pcie_parse_port(struct kirin_pcie *pcie,
struct platform_device *pdev,
struct device_node *node)
{
struct device *dev = &pdev->dev;
struct device_node *parent, *child;
int ret, slot, i;
char name[32];
for_each_available_child_of_node(node, parent) {
for_each_available_child_of_node(parent, child) {
i = pcie->num_slots;
pcie->gpio_id_reset[i] = of_get_named_gpio(child,
"reset-gpios", 0);
if (pcie->gpio_id_reset[i] < 0)
continue;
pcie->num_slots++;
if (pcie->num_slots > MAX_PCI_SLOTS) {
dev_err(dev, "Too many PCI slots!\n");
ret = -EINVAL;
goto put_node;
}
ret = of_pci_get_devfn(child);
if (ret < 0) {
dev_err(dev, "failed to parse devfn: %d\n", ret);
goto put_node;
}
slot = PCI_SLOT(ret);
sprintf(name, "pcie_perst_%d", slot);
pcie->reset_names[i] = devm_kstrdup_const(dev, name,
GFP_KERNEL);
if (!pcie->reset_names[i]) {
ret = -ENOMEM;
goto put_node;
}
}
}
return 0;
put_node:
of_node_put(child);
of_node_put(parent);
return ret;
}
static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *child, *node = dev->of_node;
void __iomem *apb_base;
int ret;
apb_base = devm_platform_ioremap_resource_byname(pdev, "apb");
if (IS_ERR(apb_base))
return PTR_ERR(apb_base);
kirin_pcie->apb = devm_regmap_init_mmio(dev, apb_base,
&pcie_kirin_regmap_conf);
if (IS_ERR(kirin_pcie->apb))
return PTR_ERR(kirin_pcie->apb);
/* pcie internal PERST# gpio */
kirin_pcie->gpio_id_dwc_perst = of_get_named_gpio(dev->of_node,
"reset-gpios", 0);
if (kirin_pcie->gpio_id_dwc_perst == -EPROBE_DEFER) {
return -EPROBE_DEFER;
} else if (!gpio_is_valid(kirin_pcie->gpio_id_dwc_perst)) {
dev_err(dev, "unable to get a valid gpio pin\n");
return -ENODEV;
}
ret = kirin_pcie_get_gpio_enable(kirin_pcie, pdev);
if (ret)
return ret;
/* Parse OF children */
for_each_available_child_of_node(node, child) {
ret = kirin_pcie_parse_port(kirin_pcie, pdev, child);
if (ret)
goto put_node;
}
return 0;
put_node:
of_node_put(child);
return ret;
}
static void kirin_pcie_sideband_dbi_w_mode(struct kirin_pcie *kirin_pcie,
bool on)
{
u32 val;
regmap_read(kirin_pcie->apb, SOC_PCIECTRL_CTRL0_ADDR, &val);
if (on)
val = val | PCIE_ELBI_SLV_DBI_ENABLE;
else
val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
regmap_write(kirin_pcie->apb, SOC_PCIECTRL_CTRL0_ADDR, val);
}
static void kirin_pcie_sideband_dbi_r_mode(struct kirin_pcie *kirin_pcie,
bool on)
{
u32 val;
regmap_read(kirin_pcie->apb, SOC_PCIECTRL_CTRL1_ADDR, &val);
if (on)
val = val | PCIE_ELBI_SLV_DBI_ENABLE;
else
val = val & ~PCIE_ELBI_SLV_DBI_ENABLE;
regmap_write(kirin_pcie->apb, SOC_PCIECTRL_CTRL1_ADDR, val);
}
static int kirin_pcie_rd_own_conf(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);
if (PCI_SLOT(devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
*val = dw_pcie_read_dbi(pci, where, size);
return PCIBIOS_SUCCESSFUL;
}
static int kirin_pcie_wr_own_conf(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);
if (PCI_SLOT(devfn))
return PCIBIOS_DEVICE_NOT_FOUND;
dw_pcie_write_dbi(pci, where, size, val);
return PCIBIOS_SUCCESSFUL;
}
static int kirin_pcie_add_bus(struct pci_bus *bus)
{
struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
int i, ret;
if (!kirin_pcie->num_slots)
return 0;
/* Send PERST# to each slot */
for (i = 0; i < kirin_pcie->num_slots; i++) {
ret = gpio_direction_output(kirin_pcie->gpio_id_reset[i], 1);
if (ret) {
dev_err(pci->dev, "PERST# %s error: %d\n",
kirin_pcie->reset_names[i], ret);
}
}
usleep_range(PERST_2_ACCESS_MIN, PERST_2_ACCESS_MAX);
return 0;
}
static struct pci_ops kirin_pci_ops = {
.read = kirin_pcie_rd_own_conf,
.write = kirin_pcie_wr_own_conf,
.add_bus = kirin_pcie_add_bus,
};
static u32 kirin_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base,
u32 reg, size_t size)
{
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
u32 ret;
kirin_pcie_sideband_dbi_r_mode(kirin_pcie, true);
dw_pcie_read(base + reg, size, &ret);
kirin_pcie_sideband_dbi_r_mode(kirin_pcie, false);
return ret;
}
static void kirin_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
u32 reg, size_t size, u32 val)
{
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
kirin_pcie_sideband_dbi_w_mode(kirin_pcie, true);
dw_pcie_write(base + reg, size, val);
kirin_pcie_sideband_dbi_w_mode(kirin_pcie, false);
}
static int kirin_pcie_link_up(struct dw_pcie *pci)
{
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
u32 val;
regmap_read(kirin_pcie->apb, PCIE_APB_PHY_STATUS0, &val);
if ((val & PCIE_LINKUP_ENABLE) == PCIE_LINKUP_ENABLE)
return 1;
return 0;
}
static int kirin_pcie_start_link(struct dw_pcie *pci)
{
struct kirin_pcie *kirin_pcie = to_kirin_pcie(pci);
/* assert LTSSM enable */
regmap_write(kirin_pcie->apb, PCIE_APP_LTSSM_ENABLE,
PCIE_LTSSM_ENABLE_BIT);
return 0;
}
static int kirin_pcie_host_init(struct dw_pcie_rp *pp)
{
pp->bridge->ops = &kirin_pci_ops;
return 0;
}
static int kirin_pcie_gpio_request(struct kirin_pcie *kirin_pcie,
struct device *dev)
{
int ret, i;
for (i = 0; i < kirin_pcie->num_slots; i++) {
if (!gpio_is_valid(kirin_pcie->gpio_id_reset[i])) {
dev_err(dev, "unable to get a valid %s gpio\n",
kirin_pcie->reset_names[i]);
return -ENODEV;
}
ret = devm_gpio_request(dev, kirin_pcie->gpio_id_reset[i],
kirin_pcie->reset_names[i]);
if (ret)
return ret;
}
for (i = 0; i < kirin_pcie->n_gpio_clkreq; i++) {
if (!gpio_is_valid(kirin_pcie->gpio_id_clkreq[i])) {
dev_err(dev, "unable to get a valid %s gpio\n",
kirin_pcie->clkreq_names[i]);
return -ENODEV;
}
ret = devm_gpio_request(dev, kirin_pcie->gpio_id_clkreq[i],
kirin_pcie->clkreq_names[i]);
if (ret)
return ret;
ret = gpio_direction_output(kirin_pcie->gpio_id_clkreq[i], 0);
if (ret)
return ret;
}
return 0;
}
static const struct dw_pcie_ops kirin_dw_pcie_ops = {
.read_dbi = kirin_pcie_read_dbi,
.write_dbi = kirin_pcie_write_dbi,
.link_up = kirin_pcie_link_up,
.start_link = kirin_pcie_start_link,
};
static const struct dw_pcie_host_ops kirin_pcie_host_ops = {
.host_init = kirin_pcie_host_init,
};
static int kirin_pcie_power_off(struct kirin_pcie *kirin_pcie)
{
int i;
if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY)
return hi3660_pcie_phy_power_off(kirin_pcie);
for (i = 0; i < kirin_pcie->n_gpio_clkreq; i++)
gpio_direction_output(kirin_pcie->gpio_id_clkreq[i], 1);
phy_power_off(kirin_pcie->phy);
phy_exit(kirin_pcie->phy);
return 0;
}
static int kirin_pcie_power_on(struct platform_device *pdev,
struct kirin_pcie *kirin_pcie)
{
struct device *dev = &pdev->dev;
int ret;
if (kirin_pcie->type == PCIE_KIRIN_INTERNAL_PHY) {
ret = hi3660_pcie_phy_init(pdev, kirin_pcie);
if (ret)
return ret;
ret = hi3660_pcie_phy_power_on(kirin_pcie);
if (ret)
return ret;
} else {
kirin_pcie->phy = devm_of_phy_get(dev, dev->of_node, NULL);
if (IS_ERR(kirin_pcie->phy))
return PTR_ERR(kirin_pcie->phy);
ret = kirin_pcie_gpio_request(kirin_pcie, dev);
if (ret)
return ret;
ret = phy_init(kirin_pcie->phy);
if (ret)
goto err;
ret = phy_power_on(kirin_pcie->phy);
if (ret)
goto err;
}
/* perst assert Endpoint */
usleep_range(REF_2_PERST_MIN, REF_2_PERST_MAX);
if (!gpio_request(kirin_pcie->gpio_id_dwc_perst, "pcie_perst_bridge")) {
ret = gpio_direction_output(kirin_pcie->gpio_id_dwc_perst, 1);
if (ret)
goto err;
}
usleep_range(PERST_2_ACCESS_MIN, PERST_2_ACCESS_MAX);
return 0;
err:
kirin_pcie_power_off(kirin_pcie);
return ret;
}
static int __exit kirin_pcie_remove(struct platform_device *pdev)
{
struct kirin_pcie *kirin_pcie = platform_get_drvdata(pdev);
dw_pcie_host_deinit(&kirin_pcie->pci->pp);
kirin_pcie_power_off(kirin_pcie);
return 0;
}
struct kirin_pcie_data {
enum pcie_kirin_phy_type phy_type;
};
static const struct kirin_pcie_data kirin_960_data = {
.phy_type = PCIE_KIRIN_INTERNAL_PHY,
};
static const struct kirin_pcie_data kirin_970_data = {
.phy_type = PCIE_KIRIN_EXTERNAL_PHY,
};
static const struct of_device_id kirin_pcie_match[] = {
{ .compatible = "hisilicon,kirin960-pcie", .data = &kirin_960_data },
{ .compatible = "hisilicon,kirin970-pcie", .data = &kirin_970_data },
{},
};
static int kirin_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
const struct kirin_pcie_data *data;
struct kirin_pcie *kirin_pcie;
struct dw_pcie *pci;
int ret;
if (!dev->of_node) {
dev_err(dev, "NULL node\n");
return -EINVAL;
}
data = of_device_get_match_data(dev);
if (!data) {
dev_err(dev, "OF data missing\n");
return -EINVAL;
}
kirin_pcie = devm_kzalloc(dev, sizeof(struct kirin_pcie), GFP_KERNEL);
if (!kirin_pcie)
return -ENOMEM;
pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
if (!pci)
return -ENOMEM;
pci->dev = dev;
pci->ops = &kirin_dw_pcie_ops;
pci->pp.ops = &kirin_pcie_host_ops;
kirin_pcie->pci = pci;
kirin_pcie->type = data->phy_type;
ret = kirin_pcie_get_resource(kirin_pcie, pdev);
if (ret)
return ret;
platform_set_drvdata(pdev, kirin_pcie);
ret = kirin_pcie_power_on(pdev, kirin_pcie);
if (ret)
return ret;
return dw_pcie_host_init(&pci->pp);
}
static struct platform_driver kirin_pcie_driver = {
.probe = kirin_pcie_probe,
.remove = __exit_p(kirin_pcie_remove),
.driver = {
.name = "kirin-pcie",
.of_match_table = kirin_pcie_match,
.suppress_bind_attrs = true,
},
};
module_platform_driver(kirin_pcie_driver);
MODULE_DEVICE_TABLE(of, kirin_pcie_match);
MODULE_DESCRIPTION("PCIe host controller driver for Kirin Phone SoCs");
MODULE_AUTHOR("Xiaowei Song <songxiaowei@huawei.com>");
MODULE_LICENSE("GPL v2");