mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-29 10:08:59 +00:00
5d51079fd0
This commit adds headers to the patches, so they can be applied with the git am command. Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
400 lines
12 KiB
Diff
400 lines
12 KiB
Diff
From 1d1885f4a7abd7272f47b835b03d8662fb981d19 Mon Sep 17 00:00:00 2001
|
|
From: Eddi De Pieri <eddi@depieri.net>
|
|
Date: Tue, 14 Oct 2014 11:04:00 +0000
|
|
Subject: [PATCH] MIPS: lantiq: ifxmips_pcie: use of
|
|
|
|
Signed-off-by: Eddi De Pieri <eddi@depieri.net>
|
|
---
|
|
arch/mips/pci/Makefile | 2 +-
|
|
arch/mips/pci/ifxmips_pcie.c | 151 +++++++++++++++++++++++++++----
|
|
arch/mips/pci/ifxmips_pcie_vr9.h | 105 ---------------------
|
|
3 files changed, 133 insertions(+), 125 deletions(-)
|
|
|
|
--- a/arch/mips/pci/Makefile
|
|
+++ b/arch/mips/pci/Makefile
|
|
@@ -43,7 +43,7 @@ obj-$(CONFIG_PCI_LANTIQ) += pci-lantiq.o
|
|
obj-$(CONFIG_SOC_MT7620) += pci-mt7620.o
|
|
obj-$(CONFIG_SOC_RT288X) += pci-rt2880.o
|
|
obj-$(CONFIG_SOC_RT3883) += pci-rt3883.o
|
|
-obj-$(CONFIG_PCIE_LANTIQ) += ifxmips_pcie_phy.o ifxmips_pcie.o fixup-lantiq-pcie.o
|
|
+obj-$(CONFIG_PCIE_LANTIQ) += ifxmips_pcie.o fixup-lantiq-pcie.o
|
|
obj-$(CONFIG_PCIE_LANTIQ_MSI) += pcie-lantiq-msi.o
|
|
obj-$(CONFIG_TANBAC_TB0219) += fixup-tb0219.o
|
|
obj-$(CONFIG_TANBAC_TB0226) += fixup-tb0226.o
|
|
--- a/arch/mips/pci/ifxmips_pcie.c
|
|
+++ b/arch/mips/pci/ifxmips_pcie.c
|
|
@@ -16,8 +16,15 @@
|
|
#include <asm/paccess.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/pci_regs.h>
|
|
+#include <linux/phy/phy.h>
|
|
+#include <linux/regmap.h>
|
|
+#include <linux/reset.h>
|
|
+#include <linux/mfd/syscon.h>
|
|
#include <linux/module.h>
|
|
|
|
+#include <linux/of_gpio.h>
|
|
+#include <linux/of_platform.h>
|
|
+
|
|
#include "ifxmips_pcie.h"
|
|
#include "ifxmips_pcie_reg.h"
|
|
|
|
@@ -40,6 +47,10 @@
|
|
static DEFINE_SPINLOCK(ifx_pcie_lock);
|
|
|
|
u32 g_pcie_debug_flag = PCIE_MSG_ANY & (~PCIE_MSG_CFG);
|
|
+static int pcie_reset_gpio;
|
|
+static struct phy *ltq_pcie_phy;
|
|
+static struct reset_control *ltq_pcie_reset;
|
|
+static struct regmap *ltq_rcu_regmap;
|
|
|
|
static ifx_pcie_irq_t pcie_irqs[IFX_PCIE_CORE_NR] = {
|
|
{
|
|
@@ -82,6 +93,22 @@ void ifx_pcie_debug(const char *fmt, ...
|
|
printk("%s", buf);
|
|
}
|
|
|
|
+static inline void pcie_ep_gpio_rst_init(int pcie_port)
|
|
+{
|
|
+ gpio_direction_output(pcie_reset_gpio, 1);
|
|
+ gpio_set_value(pcie_reset_gpio, 1);
|
|
+}
|
|
+
|
|
+static inline void pcie_device_rst_assert(int pcie_port)
|
|
+{
|
|
+ gpio_set_value(pcie_reset_gpio, 0);
|
|
+}
|
|
+
|
|
+static inline void pcie_device_rst_deassert(int pcie_port)
|
|
+{
|
|
+ mdelay(100);
|
|
+ gpio_direction_output(pcie_reset_gpio, 1);
|
|
+}
|
|
|
|
static inline int pcie_ltssm_enable(int pcie_port)
|
|
{
|
|
@@ -988,10 +1015,22 @@ int ifx_pcie_bios_plat_dev_init(struct
|
|
static int
|
|
pcie_rc_initialize(int pcie_port)
|
|
{
|
|
- int i;
|
|
+ int i, ret;
|
|
#define IFX_PCIE_PHY_LOOP_CNT 5
|
|
|
|
- pcie_rcu_endian_setup(pcie_port);
|
|
+ regmap_update_bits(ltq_rcu_regmap, 0x4c, IFX_RCU_AHB_BE_PCIE_M,
|
|
+ IFX_RCU_AHB_BE_PCIE_M);
|
|
+
|
|
+#ifdef CONFIG_IFX_PCIE_HW_SWAP
|
|
+ regmap_update_bits(ltq_rcu_regmap, 0x4c, IFX_RCU_AHB_BE_PCIE_S,
|
|
+ IFX_RCU_AHB_BE_PCIE_S);
|
|
+#else
|
|
+ regmap_update_bits(ltq_rcu_regmap, 0x4c, IFX_RCU_AHB_BE_PCIE_S,
|
|
+ 0x0);
|
|
+#endif
|
|
+
|
|
+ regmap_update_bits(ltq_rcu_regmap, 0x4c, IFX_RCU_AHB_BE_XBAR_M,
|
|
+ 0x0);
|
|
|
|
pcie_ep_gpio_rst_init(pcie_port);
|
|
|
|
@@ -1000,26 +1039,21 @@ pcie_rc_initialize(int pcie_port)
|
|
* reset PCIe PHY will solve this issue
|
|
*/
|
|
for (i = 0; i < IFX_PCIE_PHY_LOOP_CNT; i++) {
|
|
- /* Disable PCIe PHY Analog part for sanity check */
|
|
- pcie_phy_pmu_disable(pcie_port);
|
|
-
|
|
- pcie_phy_rst_assert(pcie_port);
|
|
- pcie_phy_rst_deassert(pcie_port);
|
|
-
|
|
- /* Make sure PHY PLL is stable */
|
|
- udelay(20);
|
|
-
|
|
- /* PCIe Core reset enabled, low active, sw programmed */
|
|
- pcie_core_rst_assert(pcie_port);
|
|
+ ret = phy_init(ltq_pcie_phy);
|
|
+ if (ret)
|
|
+ continue;
|
|
|
|
/* Put PCIe EP in reset status */
|
|
pcie_device_rst_assert(pcie_port);
|
|
|
|
- /* PCI PHY & Core reset disabled, high active, sw programmed */
|
|
- pcie_core_rst_deassert(pcie_port);
|
|
+ udelay(1);
|
|
+ reset_control_deassert(ltq_pcie_reset);
|
|
|
|
- /* Already in a quiet state, program PLL, enable PHY, check ready bit */
|
|
- pcie_phy_clock_mode_setup(pcie_port);
|
|
+ ret = phy_power_on(ltq_pcie_phy);
|
|
+ if (ret) {
|
|
+ phy_exit(ltq_pcie_phy);
|
|
+ continue;
|
|
+ }
|
|
|
|
/* Enable PCIe PHY and Clock */
|
|
pcie_core_pmu_setup(pcie_port);
|
|
@@ -1035,6 +1069,10 @@ pcie_rc_initialize(int pcie_port)
|
|
/* Once link is up, break out */
|
|
if (pcie_app_loigc_setup(pcie_port) == 0)
|
|
break;
|
|
+
|
|
+ phy_power_off(ltq_pcie_phy);
|
|
+ reset_control_assert(ltq_pcie_reset);
|
|
+ phy_exit(ltq_pcie_phy);
|
|
}
|
|
if (i >= IFX_PCIE_PHY_LOOP_CNT) {
|
|
printk(KERN_ERR "%s link up failed!!!!!\n", __func__);
|
|
@@ -1045,17 +1083,67 @@ pcie_rc_initialize(int pcie_port)
|
|
return 0;
|
|
}
|
|
|
|
-static int __init ifx_pcie_bios_init(void)
|
|
+static int ifx_pcie_bios_probe(struct platform_device *pdev)
|
|
{
|
|
+ struct device_node *node = pdev->dev.of_node;
|
|
void __iomem *io_map_base;
|
|
int pcie_port;
|
|
int startup_port;
|
|
+ struct device_node *np;
|
|
+ struct pci_bus *bus;
|
|
+
|
|
+ /*
|
|
+ * In case a PCI device is physical present, the Lantiq PCI driver need
|
|
+ * to be loaded prior to the Lantiq PCIe driver. Otherwise none of them
|
|
+ * will work.
|
|
+ *
|
|
+ * In case the lantiq PCI driver is enabled in the device tree, check if
|
|
+ * a PCI bus (hopefully the one of the Lantiq PCI driver one) is already
|
|
+ * registered.
|
|
+ *
|
|
+ * It will fail if there is another PCI controller, this controller is
|
|
+ * registered before the Lantiq PCIe driver is probe and the lantiq PCI
|
|
+ */
|
|
+ np = of_find_compatible_node(NULL, NULL, "lantiq,pci-xway");
|
|
+
|
|
+ if (of_device_is_available(np)) {
|
|
+ bus = pci_find_next_bus(bus);
|
|
+
|
|
+ if (!bus)
|
|
+ return -EPROBE_DEFER;
|
|
+ }
|
|
|
|
/* Enable AHB Master/ Slave */
|
|
pcie_ahb_pmu_setup();
|
|
|
|
startup_port = IFX_PCIE_PORT0;
|
|
-
|
|
+
|
|
+ ltq_pcie_phy = devm_phy_get(&pdev->dev, "pcie");
|
|
+ if (IS_ERR(ltq_pcie_phy)) {
|
|
+ dev_err(&pdev->dev, "failed to get the PCIe PHY\n");
|
|
+ return PTR_ERR(ltq_pcie_phy);
|
|
+ }
|
|
+
|
|
+ ltq_pcie_reset = devm_reset_control_get_shared(&pdev->dev, NULL);
|
|
+ if (IS_ERR(ltq_pcie_reset)) {
|
|
+ dev_err(&pdev->dev, "failed to get the PCIe reset line\n");
|
|
+ return PTR_ERR(ltq_pcie_reset);
|
|
+ }
|
|
+
|
|
+ ltq_rcu_regmap = syscon_regmap_lookup_by_phandle(node, "lantiq,rcu");
|
|
+ if (IS_ERR(ltq_rcu_regmap))
|
|
+ return PTR_ERR(ltq_rcu_regmap);
|
|
+
|
|
+ pcie_reset_gpio = of_get_named_gpio(node, "gpio-reset", 0);
|
|
+ if (gpio_is_valid(pcie_reset_gpio)) {
|
|
+ int ret = devm_gpio_request(&pdev->dev, pcie_reset_gpio, "pcie-reset");
|
|
+ if (ret) {
|
|
+ dev_err(&pdev->dev, "failed to request gpio %d\n", pcie_reset_gpio);
|
|
+ return ret;
|
|
+ }
|
|
+ gpio_direction_output(pcie_reset_gpio, 1);
|
|
+ }
|
|
+
|
|
for (pcie_port = startup_port; pcie_port < IFX_PCIE_CORE_NR; pcie_port++){
|
|
if (pcie_rc_initialize(pcie_port) == 0) {
|
|
IFX_PCIE_PRINT(PCIE_MSG_INIT, "%s: ifx_pcie_cfg_base 0x%p\n",
|
|
@@ -1067,6 +1155,7 @@ static int __init ifx_pcie_bios_init(voi
|
|
return -ENOMEM;
|
|
}
|
|
ifx_pcie_controller[pcie_port].pcic.io_map_base = (unsigned long)io_map_base;
|
|
+ pci_load_of_ranges(&ifx_pcie_controller[pcie_port].pcic, node);
|
|
|
|
register_pci_controller(&ifx_pcie_controller[pcie_port].pcic);
|
|
/* XXX, clear error status */
|
|
@@ -1083,6 +1172,30 @@ static int __init ifx_pcie_bios_init(voi
|
|
|
|
return 0;
|
|
}
|
|
+
|
|
+static const struct of_device_id ifxmips_pcie_match[] = {
|
|
+ { .compatible = "lantiq,pcie-xrx200" },
|
|
+ {},
|
|
+};
|
|
+MODULE_DEVICE_TABLE(of, ifxmips_pcie_match);
|
|
+
|
|
+static struct platform_driver ltq_pci_driver = {
|
|
+ .probe = ifx_pcie_bios_probe,
|
|
+ .driver = {
|
|
+ .name = "pcie-xrx200",
|
|
+ .owner = THIS_MODULE,
|
|
+ .of_match_table = ifxmips_pcie_match,
|
|
+ },
|
|
+};
|
|
+
|
|
+int __init ifx_pcie_bios_init(void)
|
|
+{
|
|
+ int ret = platform_driver_register(<q_pci_driver);
|
|
+ if (ret)
|
|
+ pr_info("pcie-xrx200: Error registering platform driver!");
|
|
+ return ret;
|
|
+}
|
|
+
|
|
arch_initcall(ifx_pcie_bios_init);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
--- a/arch/mips/pci/ifxmips_pcie_vr9.h
|
|
+++ b/arch/mips/pci/ifxmips_pcie_vr9.h
|
|
@@ -22,8 +22,6 @@
|
|
#include <linux/gpio.h>
|
|
#include <lantiq_soc.h>
|
|
|
|
-#define IFX_PCIE_GPIO_RESET 494
|
|
-
|
|
#define IFX_REG_R32 ltq_r32
|
|
#define IFX_REG_W32 ltq_w32
|
|
#define CONFIG_IFX_PCIE_HW_SWAP
|
|
@@ -53,21 +51,6 @@
|
|
#define OUT ((volatile u32*)(IFX_GPIO + 0x0070))
|
|
|
|
|
|
-static inline void pcie_ep_gpio_rst_init(int pcie_port)
|
|
-{
|
|
-
|
|
- gpio_request(IFX_PCIE_GPIO_RESET, "pcie-reset");
|
|
- gpio_direction_output(IFX_PCIE_GPIO_RESET, 1);
|
|
- gpio_set_value(IFX_PCIE_GPIO_RESET, 1);
|
|
-
|
|
-/* ifx_gpio_pin_reserve(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
|
|
- ifx_gpio_output_set(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
|
|
- ifx_gpio_dir_out_set(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
|
|
- ifx_gpio_altsel0_clear(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
|
|
- ifx_gpio_altsel1_clear(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
|
|
- ifx_gpio_open_drain_set(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);*/
|
|
-}
|
|
-
|
|
static inline void pcie_ahb_pmu_setup(void)
|
|
{
|
|
/* Enable AHB bus master/slave */
|
|
@@ -79,24 +62,6 @@ static inline void pcie_ahb_pmu_setup(vo
|
|
//AHBS_PMU_SETUP(IFX_PMU_ENABLE);
|
|
}
|
|
|
|
-static inline void pcie_rcu_endian_setup(int pcie_port)
|
|
-{
|
|
- u32 reg;
|
|
-
|
|
- reg = IFX_REG_R32(IFX_RCU_AHB_ENDIAN);
|
|
-#ifdef CONFIG_IFX_PCIE_HW_SWAP
|
|
- reg |= IFX_RCU_AHB_BE_PCIE_M;
|
|
- reg |= IFX_RCU_AHB_BE_PCIE_S;
|
|
- reg &= ~IFX_RCU_AHB_BE_XBAR_M;
|
|
-#else
|
|
- reg |= IFX_RCU_AHB_BE_PCIE_M;
|
|
- reg &= ~IFX_RCU_AHB_BE_PCIE_S;
|
|
- reg &= ~IFX_RCU_AHB_BE_XBAR_M;
|
|
-#endif /* CONFIG_IFX_PCIE_HW_SWAP */
|
|
- IFX_REG_W32(reg, IFX_RCU_AHB_ENDIAN);
|
|
- IFX_PCIE_PRINT(PCIE_MSG_REG, "%s IFX_RCU_AHB_ENDIAN: 0x%08x\n", __func__, IFX_REG_R32(IFX_RCU_AHB_ENDIAN));
|
|
-}
|
|
-
|
|
static inline void pcie_phy_pmu_enable(int pcie_port)
|
|
{
|
|
struct clk *clk;
|
|
@@ -115,17 +80,6 @@ static inline void pcie_phy_pmu_disable(
|
|
// PCIE_PHY_PMU_SETUP(IFX_PMU_DISABLE);
|
|
}
|
|
|
|
-static inline void pcie_pdi_big_endian(int pcie_port)
|
|
-{
|
|
- u32 reg;
|
|
-
|
|
- /* SRAM2PDI endianness control. */
|
|
- reg = IFX_REG_R32(IFX_RCU_AHB_ENDIAN);
|
|
- /* Config AHB->PCIe and PDI endianness */
|
|
- reg |= IFX_RCU_AHB_BE_PCIE_PDI;
|
|
- IFX_REG_W32(reg, IFX_RCU_AHB_ENDIAN);
|
|
-}
|
|
-
|
|
static inline void pcie_pdi_pmu_enable(int pcie_port)
|
|
{
|
|
/* Enable PDI to access PCIe PHY register */
|
|
@@ -135,65 +89,6 @@ static inline void pcie_pdi_pmu_enable(i
|
|
//PDI_PMU_SETUP(IFX_PMU_ENABLE);
|
|
}
|
|
|
|
-static inline void pcie_core_rst_assert(int pcie_port)
|
|
-{
|
|
- u32 reg;
|
|
-
|
|
- reg = IFX_REG_R32(IFX_RCU_RST_REQ);
|
|
-
|
|
- /* Reset PCIe PHY & Core, bit 22, bit 26 may be affected if write it directly */
|
|
- reg |= 0x00400000;
|
|
- IFX_REG_W32(reg, IFX_RCU_RST_REQ);
|
|
-}
|
|
-
|
|
-static inline void pcie_core_rst_deassert(int pcie_port)
|
|
-{
|
|
- u32 reg;
|
|
-
|
|
- /* Make sure one micro-second delay */
|
|
- udelay(1);
|
|
-
|
|
- /* Reset PCIe PHY & Core, bit 22 */
|
|
- reg = IFX_REG_R32(IFX_RCU_RST_REQ);
|
|
- reg &= ~0x00400000;
|
|
- IFX_REG_W32(reg, IFX_RCU_RST_REQ);
|
|
-}
|
|
-
|
|
-static inline void pcie_phy_rst_assert(int pcie_port)
|
|
-{
|
|
- u32 reg;
|
|
-
|
|
- reg = IFX_REG_R32(IFX_RCU_RST_REQ);
|
|
- reg |= 0x00001000; /* Bit 12 */
|
|
- IFX_REG_W32(reg, IFX_RCU_RST_REQ);
|
|
-}
|
|
-
|
|
-static inline void pcie_phy_rst_deassert(int pcie_port)
|
|
-{
|
|
- u32 reg;
|
|
-
|
|
- /* Make sure one micro-second delay */
|
|
- udelay(1);
|
|
-
|
|
- reg = IFX_REG_R32(IFX_RCU_RST_REQ);
|
|
- reg &= ~0x00001000; /* Bit 12 */
|
|
- IFX_REG_W32(reg, IFX_RCU_RST_REQ);
|
|
-}
|
|
-
|
|
-static inline void pcie_device_rst_assert(int pcie_port)
|
|
-{
|
|
- gpio_set_value(IFX_PCIE_GPIO_RESET, 0);
|
|
-// ifx_gpio_output_clear(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
|
|
-}
|
|
-
|
|
-static inline void pcie_device_rst_deassert(int pcie_port)
|
|
-{
|
|
- mdelay(100);
|
|
- gpio_direction_output(IFX_PCIE_GPIO_RESET, 1);
|
|
-// gpio_set_value(IFX_PCIE_GPIO_RESET, 1);
|
|
- //ifx_gpio_output_set(IFX_PCIE_GPIO_RESET, ifx_pcie_gpio_module_id);
|
|
-}
|
|
-
|
|
static inline void pcie_core_pmu_setup(int pcie_port)
|
|
{
|
|
struct clk *clk;
|