| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Serge Semin | 2637 | 100.00% | 1 | 100.00% |
| Total | 2637 | 1 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2021 BAIKAL ELECTRONICS, JSC * * Authors: * Vadim Vlasov <Vadim.Vlasov@baikalelectronics.ru> * Serge Semin <Sergey.Semin@baikalelectronics.ru> * * Baikal-T1 PCIe controller driver */ #include <linux/bitfield.h> #include <linux/bits.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/kernel.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/pci.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/reset.h> #include <linux/types.h> #include "pcie-designware.h" /* Baikal-T1 System CCU control registers */ #define BT1_CCU_PCIE_CLKC 0x140 #define BT1_CCU_PCIE_REQ_PCS_CLK BIT(16) #define BT1_CCU_PCIE_REQ_MAC_CLK BIT(17) #define BT1_CCU_PCIE_REQ_PIPE_CLK BIT(18) #define BT1_CCU_PCIE_RSTC 0x144 #define BT1_CCU_PCIE_REQ_LINK_RST BIT(13) #define BT1_CCU_PCIE_REQ_SMLH_RST BIT(14) #define BT1_CCU_PCIE_REQ_PHY_RST BIT(16) #define BT1_CCU_PCIE_REQ_CORE_RST BIT(24) #define BT1_CCU_PCIE_REQ_STICKY_RST BIT(26) #define BT1_CCU_PCIE_REQ_NSTICKY_RST BIT(27) #define BT1_CCU_PCIE_PMSC 0x148 #define BT1_CCU_PCIE_LTSSM_STATE_MASK GENMASK(5, 0) #define BT1_CCU_PCIE_LTSSM_DET_QUIET 0x00 #define BT1_CCU_PCIE_LTSSM_DET_ACT 0x01 #define BT1_CCU_PCIE_LTSSM_POLL_ACT 0x02 #define BT1_CCU_PCIE_LTSSM_POLL_COMP 0x03 #define BT1_CCU_PCIE_LTSSM_POLL_CONF 0x04 #define BT1_CCU_PCIE_LTSSM_PRE_DET_QUIET 0x05 #define BT1_CCU_PCIE_LTSSM_DET_WAIT 0x06 #define BT1_CCU_PCIE_LTSSM_CFG_LNKWD_START 0x07 #define BT1_CCU_PCIE_LTSSM_CFG_LNKWD_ACEPT 0x08 #define BT1_CCU_PCIE_LTSSM_CFG_LNNUM_WAIT 0x09 #define BT1_CCU_PCIE_LTSSM_CFG_LNNUM_ACEPT 0x0a #define BT1_CCU_PCIE_LTSSM_CFG_COMPLETE 0x0b #define BT1_CCU_PCIE_LTSSM_CFG_IDLE 0x0c #define BT1_CCU_PCIE_LTSSM_RCVR_LOCK 0x0d #define BT1_CCU_PCIE_LTSSM_RCVR_SPEED 0x0e #define BT1_CCU_PCIE_LTSSM_RCVR_RCVRCFG 0x0f #define BT1_CCU_PCIE_LTSSM_RCVR_IDLE 0x10 #define BT1_CCU_PCIE_LTSSM_L0 0x11 #define BT1_CCU_PCIE_LTSSM_L0S 0x12 #define BT1_CCU_PCIE_LTSSM_L123_SEND_IDLE 0x13 #define BT1_CCU_PCIE_LTSSM_L1_IDLE 0x14 #define BT1_CCU_PCIE_LTSSM_L2_IDLE 0x15 #define BT1_CCU_PCIE_LTSSM_L2_WAKE 0x16 #define BT1_CCU_PCIE_LTSSM_DIS_ENTRY 0x17 #define BT1_CCU_PCIE_LTSSM_DIS_IDLE 0x18 #define BT1_CCU_PCIE_LTSSM_DISABLE 0x19 #define BT1_CCU_PCIE_LTSSM_LPBK_ENTRY 0x1a #define BT1_CCU_PCIE_LTSSM_LPBK_ACTIVE 0x1b #define BT1_CCU_PCIE_LTSSM_LPBK_EXIT 0x1c #define BT1_CCU_PCIE_LTSSM_LPBK_EXIT_TOUT 0x1d #define BT1_CCU_PCIE_LTSSM_HOT_RST_ENTRY 0x1e #define BT1_CCU_PCIE_LTSSM_HOT_RST 0x1f #define BT1_CCU_PCIE_LTSSM_RCVR_EQ0 0x20 #define BT1_CCU_PCIE_LTSSM_RCVR_EQ1 0x21 #define BT1_CCU_PCIE_LTSSM_RCVR_EQ2 0x22 #define BT1_CCU_PCIE_LTSSM_RCVR_EQ3 0x23 #define BT1_CCU_PCIE_SMLH_LINKUP BIT(6) #define BT1_CCU_PCIE_RDLH_LINKUP BIT(7) #define BT1_CCU_PCIE_PM_LINKSTATE_L0S BIT(8) #define BT1_CCU_PCIE_PM_LINKSTATE_L1 BIT(9) #define BT1_CCU_PCIE_PM_LINKSTATE_L2 BIT(10) #define BT1_CCU_PCIE_L1_PENDING BIT(12) #define BT1_CCU_PCIE_REQ_EXIT_L1 BIT(14) #define BT1_CCU_PCIE_LTSSM_RCVR_EQ BIT(15) #define BT1_CCU_PCIE_PM_DSTAT_MASK GENMASK(18, 16) #define BT1_CCU_PCIE_PM_PME_EN BIT(20) #define BT1_CCU_PCIE_PM_PME_STATUS BIT(21) #define BT1_CCU_PCIE_AUX_PM_EN BIT(22) #define BT1_CCU_PCIE_AUX_PWR_DET BIT(23) #define BT1_CCU_PCIE_WAKE_DET BIT(24) #define BT1_CCU_PCIE_TURNOFF_REQ BIT(30) #define BT1_CCU_PCIE_TURNOFF_ACK BIT(31) #define BT1_CCU_PCIE_GENC 0x14c #define BT1_CCU_PCIE_LTSSM_EN BIT(1) #define BT1_CCU_PCIE_DBI2_MODE BIT(2) #define BT1_CCU_PCIE_MGMT_EN BIT(3) #define BT1_CCU_PCIE_RXLANE_FLIP_EN BIT(16) #define BT1_CCU_PCIE_TXLANE_FLIP_EN BIT(17) #define BT1_CCU_PCIE_SLV_XFER_PEND BIT(24) #define BT1_CCU_PCIE_RCV_XFER_PEND BIT(25) #define BT1_CCU_PCIE_DBI_XFER_PEND BIT(26) #define BT1_CCU_PCIE_DMA_XFER_PEND BIT(27) #define BT1_CCU_PCIE_LTSSM_LINKUP(_pmsc) \ ({ \ int __state = FIELD_GET(BT1_CCU_PCIE_LTSSM_STATE_MASK, _pmsc); \ __state >= BT1_CCU_PCIE_LTSSM_L0 && __state <= BT1_CCU_PCIE_LTSSM_L2_WAKE; \ }) /* Baikal-T1 PCIe specific control registers */ #define BT1_PCIE_AXI2MGM_LANENUM 0xd04 #define BT1_PCIE_AXI2MGM_LANESEL_MASK GENMASK(3, 0) #define BT1_PCIE_AXI2MGM_ADDRCTL 0xd08 #define BT1_PCIE_AXI2MGM_PHYREG_ADDR_MASK GENMASK(20, 0) #define BT1_PCIE_AXI2MGM_READ_FLAG BIT(29) #define BT1_PCIE_AXI2MGM_DONE BIT(30) #define BT1_PCIE_AXI2MGM_BUSY BIT(31) #define BT1_PCIE_AXI2MGM_WRITEDATA 0xd0c #define BT1_PCIE_AXI2MGM_WDATA GENMASK(15, 0) #define BT1_PCIE_AXI2MGM_READDATA 0xd10 #define BT1_PCIE_AXI2MGM_RDATA GENMASK(15, 0) /* Generic Baikal-T1 PCIe interface resources */ #define BT1_PCIE_NUM_APP_CLKS ARRAY_SIZE(bt1_pcie_app_clks) #define BT1_PCIE_NUM_CORE_CLKS ARRAY_SIZE(bt1_pcie_core_clks) #define BT1_PCIE_NUM_APP_RSTS ARRAY_SIZE(bt1_pcie_app_rsts) #define BT1_PCIE_NUM_CORE_RSTS ARRAY_SIZE(bt1_pcie_core_rsts) /* PCIe bus setup delays and timeouts */ #define BT1_PCIE_RST_DELAY_MS 100 #define BT1_PCIE_RUN_DELAY_US 100 #define BT1_PCIE_REQ_DELAY_US 1 #define BT1_PCIE_REQ_TIMEOUT_US 1000 #define BT1_PCIE_LNK_DELAY_US 1000 #define BT1_PCIE_LNK_TIMEOUT_US 1000000 static const enum dw_pcie_app_clk bt1_pcie_app_clks[] = { DW_PCIE_DBI_CLK, DW_PCIE_MSTR_CLK, DW_PCIE_SLV_CLK, }; static const enum dw_pcie_core_clk bt1_pcie_core_clks[] = { DW_PCIE_REF_CLK, }; static const enum dw_pcie_app_rst bt1_pcie_app_rsts[] = { DW_PCIE_MSTR_RST, DW_PCIE_SLV_RST, }; static const enum dw_pcie_core_rst bt1_pcie_core_rsts[] = { DW_PCIE_NON_STICKY_RST, DW_PCIE_STICKY_RST, DW_PCIE_CORE_RST, DW_PCIE_PIPE_RST, DW_PCIE_PHY_RST, DW_PCIE_HOT_RST, DW_PCIE_PWR_RST, }; struct bt1_pcie { struct dw_pcie dw; struct platform_device *pdev; struct regmap *sys_regs; }; #define to_bt1_pcie(_dw) container_of(_dw, struct bt1_pcie, dw) /* * Baikal-T1 MMIO space must be read/written by the dword-aligned * instructions. Note the methods are optimized to have the dword operations * performed with minimum overhead as the most frequently used ones. */ static int bt1_pcie_read_mmio(void __iomem *addr, int size, u32 *val) { unsigned int ofs = (uintptr_t)addr & 0x3; if (!IS_ALIGNED((uintptr_t)addr, size)) return -EINVAL; *val = readl(addr - ofs) >> ofs * BITS_PER_BYTE; if (size == 4) { return 0; } else if (size == 2) { *val &= 0xffff; return 0; } else if (size == 1) { *val &= 0xff; return 0; } return -EINVAL; } static int bt1_pcie_write_mmio(void __iomem *addr, int size, u32 val) { unsigned int ofs = (uintptr_t)addr & 0x3; u32 tmp, mask; if (!IS_ALIGNED((uintptr_t)addr, size)) return -EINVAL; if (size == 4) { writel(val, addr); return 0; } else if (size == 2 || size == 1) { mask = GENMASK(size * BITS_PER_BYTE - 1, 0); tmp = readl(addr - ofs) & ~(mask << ofs * BITS_PER_BYTE); tmp |= (val & mask) << ofs * BITS_PER_BYTE; writel(tmp, addr - ofs); return 0; } return -EINVAL; } static u32 bt1_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, size_t size) { int ret; u32 val; ret = bt1_pcie_read_mmio(base + reg, size, &val); if (ret) { dev_err(pci->dev, "Read DBI address failed\n"); return ~0U; } return val; } static void bt1_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base, u32 reg, size_t size, u32 val) { int ret; ret = bt1_pcie_write_mmio(base + reg, size, val); if (ret) dev_err(pci->dev, "Write DBI address failed\n"); } static void bt1_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base, u32 reg, size_t size, u32 val) { struct bt1_pcie *btpci = to_bt1_pcie(pci); int ret; regmap_update_bits(btpci->sys_regs, BT1_CCU_PCIE_GENC, BT1_CCU_PCIE_DBI2_MODE, BT1_CCU_PCIE_DBI2_MODE); ret = bt1_pcie_write_mmio(base + reg, size, val); if (ret) dev_err(pci->dev, "Write DBI2 address failed\n"); regmap_update_bits(btpci->sys_regs, BT1_CCU_PCIE_GENC, BT1_CCU_PCIE_DBI2_MODE, 0); } static int bt1_pcie_start_link(struct dw_pcie *pci) { struct bt1_pcie *btpci = to_bt1_pcie(pci); u32 val; int ret; /* * Enable LTSSM and make sure it was able to establish both PHY and * data links. This procedure shall work fine to reach 2.5 GT/s speed. */ regmap_update_bits(btpci->sys_regs, BT1_CCU_PCIE_GENC, BT1_CCU_PCIE_LTSSM_EN, BT1_CCU_PCIE_LTSSM_EN); ret = regmap_read_poll_timeout(btpci->sys_regs, BT1_CCU_PCIE_PMSC, val, (val & BT1_CCU_PCIE_SMLH_LINKUP), BT1_PCIE_LNK_DELAY_US, BT1_PCIE_LNK_TIMEOUT_US); if (ret) { dev_err(pci->dev, "LTSSM failed to set PHY link up\n"); return ret; } ret = regmap_read_poll_timeout(btpci->sys_regs, BT1_CCU_PCIE_PMSC, val, (val & BT1_CCU_PCIE_RDLH_LINKUP), BT1_PCIE_LNK_DELAY_US, BT1_PCIE_LNK_TIMEOUT_US); if (ret) { dev_err(pci->dev, "LTSSM failed to set data link up\n"); return ret; } /* * Activate direct speed change after the link is established in an * attempt to reach a higher bus performance (up to Gen.3 - 8.0 GT/s). * This is required at least to get 8.0 GT/s speed. */ val = dw_pcie_readl_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL); val |= PORT_LOGIC_SPEED_CHANGE; dw_pcie_writel_dbi(pci, PCIE_LINK_WIDTH_SPEED_CONTROL, val); ret = regmap_read_poll_timeout(btpci->sys_regs, BT1_CCU_PCIE_PMSC, val, BT1_CCU_PCIE_LTSSM_LINKUP(val), BT1_PCIE_LNK_DELAY_US, BT1_PCIE_LNK_TIMEOUT_US); if (ret) dev_err(pci->dev, "LTSSM failed to get into L0 state\n"); return ret; } static void bt1_pcie_stop_link(struct dw_pcie *pci) { struct bt1_pcie *btpci = to_bt1_pcie(pci); regmap_update_bits(btpci->sys_regs, BT1_CCU_PCIE_GENC, BT1_CCU_PCIE_LTSSM_EN, 0); } static const struct dw_pcie_ops bt1_pcie_ops = { .read_dbi = bt1_pcie_read_dbi, .write_dbi = bt1_pcie_write_dbi, .write_dbi2 = bt1_pcie_write_dbi2, .start_link = bt1_pcie_start_link, .stop_link = bt1_pcie_stop_link, }; static struct pci_ops bt1_pci_ops = { .map_bus = dw_pcie_own_conf_map_bus, .read = pci_generic_config_read32, .write = pci_generic_config_write32, }; static int bt1_pcie_get_resources(struct bt1_pcie *btpci) { struct device *dev = btpci->dw.dev; int i; /* DBI access is supposed to be performed by the dword-aligned IOs */ btpci->dw.pp.bridge->ops = &bt1_pci_ops; /* These CSRs are in MMIO so we won't check the regmap-methods status */ btpci->sys_regs = syscon_regmap_lookup_by_phandle(dev->of_node, "baikal,bt1-syscon"); if (IS_ERR(btpci->sys_regs)) return dev_err_probe(dev, PTR_ERR(btpci->sys_regs), "Failed to get syscon\n"); /* Make sure all the required resources have been specified */ for (i = 0; i < BT1_PCIE_NUM_APP_CLKS; i++) { if (!btpci->dw.app_clks[bt1_pcie_app_clks[i]].clk) { dev_err(dev, "App clocks set is incomplete\n"); return -ENOENT; } } for (i = 0; i < BT1_PCIE_NUM_CORE_CLKS; i++) { if (!btpci->dw.core_clks[bt1_pcie_core_clks[i]].clk) { dev_err(dev, "Core clocks set is incomplete\n"); return -ENOENT; } } for (i = 0; i < BT1_PCIE_NUM_APP_RSTS; i++) { if (!btpci->dw.app_rsts[bt1_pcie_app_rsts[i]].rstc) { dev_err(dev, "App resets set is incomplete\n"); return -ENOENT; } } for (i = 0; i < BT1_PCIE_NUM_CORE_RSTS; i++) { if (!btpci->dw.core_rsts[bt1_pcie_core_rsts[i]].rstc) { dev_err(dev, "Core resets set is incomplete\n"); return -ENOENT; } } return 0; } static void bt1_pcie_full_stop_bus(struct bt1_pcie *btpci, bool init) { struct device *dev = btpci->dw.dev; struct dw_pcie *pci = &btpci->dw; int ret; /* Disable LTSSM for sure */ regmap_update_bits(btpci->sys_regs, BT1_CCU_PCIE_GENC, BT1_CCU_PCIE_LTSSM_EN, 0); /* * Application reset controls are trigger-based so assert the core * resets only. */ ret = reset_control_bulk_assert(DW_PCIE_NUM_CORE_RSTS, pci->core_rsts); if (ret) dev_err(dev, "Failed to assert core resets\n"); /* * Clocks are disabled by default at least in accordance with the clk * enable counter value on init stage. */ if (!init) { clk_bulk_disable_unprepare(DW_PCIE_NUM_CORE_CLKS, pci->core_clks); clk_bulk_disable_unprepare(DW_PCIE_NUM_APP_CLKS, pci->app_clks); } /* The peripheral devices are unavailable anyway so reset them too */ gpiod_set_value_cansleep(pci->pe_rst, 1); /* Make sure all the resets are settled */ msleep(BT1_PCIE_RST_DELAY_MS); } /* * Implements the cold reset procedure in accordance with the reference manual * and available PM signals. */ static int bt1_pcie_cold_start_bus(struct bt1_pcie *btpci) { struct device *dev = btpci->dw.dev; struct dw_pcie *pci = &btpci->dw; u32 val; int ret; /* First get out of the Power/Hot reset state */ ret = reset_control_deassert(pci->core_rsts[DW_PCIE_PWR_RST].rstc); if (ret) { dev_err(dev, "Failed to deassert PHY reset\n"); return ret; } ret = reset_control_deassert(pci->core_rsts[DW_PCIE_HOT_RST].rstc); if (ret) { dev_err(dev, "Failed to deassert hot reset\n"); goto err_assert_pwr_rst; } /* Wait for the PM-core to stop requesting the PHY reset */ ret = regmap_read_poll_timeout(btpci->sys_regs, BT1_CCU_PCIE_RSTC, val, !(val & BT1_CCU_PCIE_REQ_PHY_RST), BT1_PCIE_REQ_DELAY_US, BT1_PCIE_REQ_TIMEOUT_US); if (ret) { dev_err(dev, "Timed out waiting for PM to stop PHY resetting\n"); goto err_assert_hot_rst; } ret = reset_control_deassert(pci->core_rsts[DW_PCIE_PHY_RST].rstc); if (ret) { dev_err(dev, "Failed to deassert PHY reset\n"); goto err_assert_hot_rst; } /* Clocks can be now enabled, but the ref one is crucial at this stage */ ret = clk_bulk_prepare_enable(DW_PCIE_NUM_APP_CLKS, pci->app_clks); if (ret) { dev_err(dev, "Failed to enable app clocks\n"); goto err_assert_phy_rst; } ret = clk_bulk_prepare_enable(DW_PCIE_NUM_CORE_CLKS, pci->core_clks); if (ret) { dev_err(dev, "Failed to enable ref clocks\n"); goto err_disable_app_clk; } /* Wait for the PM to stop requesting the controller core reset */ ret = regmap_read_poll_timeout(btpci->sys_regs, BT1_CCU_PCIE_RSTC, val, !(val & BT1_CCU_PCIE_REQ_CORE_RST), BT1_PCIE_REQ_DELAY_US, BT1_PCIE_REQ_TIMEOUT_US); if (ret) { dev_err(dev, "Timed out waiting for PM to stop core resetting\n"); goto err_disable_core_clk; } /* PCS-PIPE interface and controller core can be now activated */ ret = reset_control_deassert(pci->core_rsts[DW_PCIE_PIPE_RST].rstc); if (ret) { dev_err(dev, "Failed to deassert PIPE reset\n"); goto err_disable_core_clk; } ret = reset_control_deassert(pci->core_rsts[DW_PCIE_CORE_RST].rstc); if (ret) { dev_err(dev, "Failed to deassert core reset\n"); goto err_assert_pipe_rst; } /* It's recommended to reset the core and application logic together */ ret = reset_control_bulk_reset(DW_PCIE_NUM_APP_RSTS, pci->app_rsts); if (ret) { dev_err(dev, "Failed to reset app domain\n"); goto err_assert_core_rst; } /* Sticky/Non-sticky CSR flags can be now unreset too */ ret = reset_control_deassert(pci->core_rsts[DW_PCIE_STICKY_RST].rstc); if (ret) { dev_err(dev, "Failed to deassert sticky reset\n"); goto err_assert_core_rst; } ret = reset_control_deassert(pci->core_rsts[DW_PCIE_NON_STICKY_RST].rstc); if (ret) { dev_err(dev, "Failed to deassert non-sticky reset\n"); goto err_assert_sticky_rst; } /* Activate the PCIe bus peripheral devices */ gpiod_set_value_cansleep(pci->pe_rst, 0); /* Make sure the state is settled (LTSSM is still disabled though) */ usleep_range(BT1_PCIE_RUN_DELAY_US, BT1_PCIE_RUN_DELAY_US + 100); return 0; err_assert_sticky_rst: reset_control_assert(pci->core_rsts[DW_PCIE_STICKY_RST].rstc); err_assert_core_rst: reset_control_assert(pci->core_rsts[DW_PCIE_CORE_RST].rstc); err_assert_pipe_rst: reset_control_assert(pci->core_rsts[DW_PCIE_PIPE_RST].rstc); err_disable_core_clk: clk_bulk_disable_unprepare(DW_PCIE_NUM_CORE_CLKS, pci->core_clks); err_disable_app_clk: clk_bulk_disable_unprepare(DW_PCIE_NUM_APP_CLKS, pci->app_clks); err_assert_phy_rst: reset_control_assert(pci->core_rsts[DW_PCIE_PHY_RST].rstc); err_assert_hot_rst: reset_control_assert(pci->core_rsts[DW_PCIE_HOT_RST].rstc); err_assert_pwr_rst: reset_control_assert(pci->core_rsts[DW_PCIE_PWR_RST].rstc); return ret; } static int bt1_pcie_host_init(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct bt1_pcie *btpci = to_bt1_pcie(pci); int ret; ret = bt1_pcie_get_resources(btpci); if (ret) return ret; bt1_pcie_full_stop_bus(btpci, true); return bt1_pcie_cold_start_bus(btpci); } static void bt1_pcie_host_deinit(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); struct bt1_pcie *btpci = to_bt1_pcie(pci); bt1_pcie_full_stop_bus(btpci, false); } static const struct dw_pcie_host_ops bt1_pcie_host_ops = { .host_init = bt1_pcie_host_init, .host_deinit = bt1_pcie_host_deinit, }; static struct bt1_pcie *bt1_pcie_create_data(struct platform_device *pdev) { struct bt1_pcie *btpci; btpci = devm_kzalloc(&pdev->dev, sizeof(*btpci), GFP_KERNEL); if (!btpci) return ERR_PTR(-ENOMEM); btpci->pdev = pdev; platform_set_drvdata(pdev, btpci); return btpci; } static int bt1_pcie_add_port(struct bt1_pcie *btpci) { struct device *dev = &btpci->pdev->dev; int ret; btpci->dw.version = DW_PCIE_VER_460A; btpci->dw.dev = dev; btpci->dw.ops = &bt1_pcie_ops; btpci->dw.pp.num_vectors = MAX_MSI_IRQS; btpci->dw.pp.ops = &bt1_pcie_host_ops; dw_pcie_cap_set(&btpci->dw, REQ_RES); ret = dw_pcie_host_init(&btpci->dw.pp); return dev_err_probe(dev, ret, "Failed to initialize DWC PCIe host\n"); } static void bt1_pcie_del_port(struct bt1_pcie *btpci) { dw_pcie_host_deinit(&btpci->dw.pp); } static int bt1_pcie_probe(struct platform_device *pdev) { struct bt1_pcie *btpci; btpci = bt1_pcie_create_data(pdev); if (IS_ERR(btpci)) return PTR_ERR(btpci); return bt1_pcie_add_port(btpci); } static int bt1_pcie_remove(struct platform_device *pdev) { struct bt1_pcie *btpci = platform_get_drvdata(pdev); bt1_pcie_del_port(btpci); return 0; } static const struct of_device_id bt1_pcie_of_match[] = { { .compatible = "baikal,bt1-pcie" }, {}, }; MODULE_DEVICE_TABLE(of, bt1_pcie_of_match); static struct platform_driver bt1_pcie_driver = { .probe = bt1_pcie_probe, .remove = bt1_pcie_remove, .driver = { .name = "bt1-pcie", .of_match_table = bt1_pcie_of_match, }, }; module_platform_driver(bt1_pcie_driver); MODULE_AUTHOR("Serge Semin <Sergey.Semin@baikalelectronics.ru>"); MODULE_DESCRIPTION("Baikal-T1 PCIe driver"); MODULE_LICENSE("GPL");
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