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https://github.com/brain-hackers/u-boot-brain
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![Simon Glass](/assets/img/avatar_default.png)
At present various drivers etc. access the device's 'seq' member directly. This makes it harder to change the meaning of that member. Change access to go through a function instead. The drivers/i2c/lpc32xx_i2c.c file is left unchanged for now. Signed-off-by: Simon Glass <sjg@chromium.org>
570 lines
15 KiB
C
570 lines
15 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Rockchip AXI PCIe host controller driver
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*
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* Copyright (c) 2016 Rockchip, Inc.
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* Copyright (c) 2020 Amarula Solutions(India)
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* Copyright (c) 2020 Jagan Teki <jagan@amarulasolutions.com>
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* Copyright (c) 2019 Patrick Wildt <patrick@blueri.se>
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* Copyright (c) 2018 Mark Kettenis <kettenis@openbsd.org>
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*
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* Bits taken from Linux Rockchip PCIe host controller.
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*/
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#include <common.h>
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#include <clk.h>
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#include <dm.h>
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#include <dm/device_compat.h>
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#include <generic-phy.h>
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#include <pci.h>
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#include <power-domain.h>
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#include <power/regulator.h>
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#include <reset.h>
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#include <syscon.h>
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#include <asm/io.h>
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#include <asm-generic/gpio.h>
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#include <asm/arch-rockchip/clock.h>
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#include <linux/iopoll.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define HIWORD_UPDATE(mask, val) (((mask) << 16) | (val))
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#define HIWORD_UPDATE_BIT(val) HIWORD_UPDATE(val, val)
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#define ENCODE_LANES(x) ((((x) >> 1) & 3) << 4)
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#define PCIE_CLIENT_BASE 0x0
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#define PCIE_CLIENT_CONFIG (PCIE_CLIENT_BASE + 0x00)
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#define PCIE_CLIENT_CONF_ENABLE HIWORD_UPDATE_BIT(0x0001)
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#define PCIE_CLIENT_LINK_TRAIN_ENABLE HIWORD_UPDATE_BIT(0x0002)
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#define PCIE_CLIENT_MODE_RC HIWORD_UPDATE_BIT(0x0040)
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#define PCIE_CLIENT_GEN_SEL_1 HIWORD_UPDATE(0x0080, 0)
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#define PCIE_CLIENT_BASIC_STATUS1 0x0048
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#define PCIE_CLIENT_LINK_STATUS_UP GENMASK(21, 20)
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#define PCIE_CLIENT_LINK_STATUS_MASK GENMASK(21, 20)
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#define PCIE_LINK_UP(x) \
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(((x) & PCIE_CLIENT_LINK_STATUS_MASK) == PCIE_CLIENT_LINK_STATUS_UP)
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#define PCIE_RC_NORMAL_BASE 0x800000
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#define PCIE_LM_BASE 0x900000
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#define PCIE_LM_VENDOR_ID (PCIE_LM_BASE + 0x44)
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#define PCIE_LM_VENDOR_ROCKCHIP 0x1d87
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#define PCIE_LM_RCBAR (PCIE_LM_BASE + 0x300)
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#define PCIE_LM_RCBARPIE BIT(19)
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#define PCIE_LM_RCBARPIS BIT(20)
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#define PCIE_RC_BASE 0xa00000
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#define PCIE_RC_CONFIG_DCR (PCIE_RC_BASE + 0x0c4)
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#define PCIE_RC_CONFIG_DCR_CSPL_SHIFT 18
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#define PCIE_RC_CONFIG_DCR_CPLS_SHIFT 26
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#define PCIE_RC_PCIE_LCAP (PCIE_RC_BASE + 0x0cc)
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#define PCIE_RC_PCIE_LCAP_APMS_L0S BIT(10)
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#define PCIE_ATR_BASE 0xc00000
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#define PCIE_ATR_OB_ADDR0(i) (PCIE_ATR_BASE + 0x000 + (i) * 0x20)
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#define PCIE_ATR_OB_ADDR1(i) (PCIE_ATR_BASE + 0x004 + (i) * 0x20)
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#define PCIE_ATR_OB_DESC0(i) (PCIE_ATR_BASE + 0x008 + (i) * 0x20)
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#define PCIE_ATR_OB_DESC1(i) (PCIE_ATR_BASE + 0x00c + (i) * 0x20)
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#define PCIE_ATR_IB_ADDR0(i) (PCIE_ATR_BASE + 0x800 + (i) * 0x8)
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#define PCIE_ATR_IB_ADDR1(i) (PCIE_ATR_BASE + 0x804 + (i) * 0x8)
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#define PCIE_ATR_HDR_MEM 0x2
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#define PCIE_ATR_HDR_IO 0x6
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#define PCIE_ATR_HDR_CFG_TYPE0 0xa
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#define PCIE_ATR_HDR_CFG_TYPE1 0xb
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#define PCIE_ATR_HDR_RID BIT(23)
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#define PCIE_ATR_OB_REGION0_SIZE (32 * 1024 * 1024)
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#define PCIE_ATR_OB_REGION_SIZE (1 * 1024 * 1024)
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struct rockchip_pcie {
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fdt_addr_t axi_base;
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fdt_addr_t apb_base;
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int first_busno;
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struct udevice *dev;
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/* resets */
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struct reset_ctl core_rst;
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struct reset_ctl mgmt_rst;
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struct reset_ctl mgmt_sticky_rst;
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struct reset_ctl pipe_rst;
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struct reset_ctl pm_rst;
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struct reset_ctl pclk_rst;
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struct reset_ctl aclk_rst;
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/* gpio */
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struct gpio_desc ep_gpio;
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/* vpcie regulators */
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struct udevice *vpcie12v;
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struct udevice *vpcie3v3;
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struct udevice *vpcie1v8;
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struct udevice *vpcie0v9;
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/* phy */
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struct phy pcie_phy;
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};
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static int rockchip_pcie_off_conf(pci_dev_t bdf, uint offset)
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{
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unsigned int bus = PCI_BUS(bdf);
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unsigned int dev = PCI_DEV(bdf);
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unsigned int func = PCI_FUNC(bdf);
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return (bus << 20) | (dev << 15) | (func << 12) | (offset & ~0x3);
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}
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static int rockchip_pcie_rd_conf(const struct udevice *udev, pci_dev_t bdf,
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uint offset, ulong *valuep,
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enum pci_size_t size)
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{
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struct rockchip_pcie *priv = dev_get_priv(udev);
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unsigned int bus = PCI_BUS(bdf);
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unsigned int dev = PCI_DEV(bdf);
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int where = rockchip_pcie_off_conf(bdf, offset);
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ulong value;
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if (bus == priv->first_busno && dev == 0) {
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value = readl(priv->apb_base + PCIE_RC_NORMAL_BASE + where);
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*valuep = pci_conv_32_to_size(value, offset, size);
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return 0;
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}
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if ((bus == priv->first_busno + 1) && dev == 0) {
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value = readl(priv->axi_base + where);
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*valuep = pci_conv_32_to_size(value, offset, size);
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return 0;
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}
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*valuep = pci_get_ff(size);
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return 0;
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}
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static int rockchip_pcie_wr_conf(struct udevice *udev, pci_dev_t bdf,
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uint offset, ulong value,
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enum pci_size_t size)
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{
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struct rockchip_pcie *priv = dev_get_priv(udev);
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unsigned int bus = PCI_BUS(bdf);
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unsigned int dev = PCI_DEV(bdf);
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int where = rockchip_pcie_off_conf(bdf, offset);
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ulong old;
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if (bus == priv->first_busno && dev == 0) {
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old = readl(priv->apb_base + PCIE_RC_NORMAL_BASE + where);
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value = pci_conv_size_to_32(old, value, offset, size);
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writel(value, priv->apb_base + PCIE_RC_NORMAL_BASE + where);
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return 0;
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}
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if ((bus == priv->first_busno + 1) && dev == 0) {
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old = readl(priv->axi_base + where);
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value = pci_conv_size_to_32(old, value, offset, size);
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writel(value, priv->axi_base + where);
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return 0;
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}
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return 0;
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}
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static int rockchip_pcie_atr_init(struct rockchip_pcie *priv)
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{
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struct udevice *ctlr = pci_get_controller(priv->dev);
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struct pci_controller *hose = dev_get_uclass_priv(ctlr);
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u64 addr, size, offset;
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u32 type;
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int i, region;
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/* Use region 0 to map PCI configuration space. */
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writel(25 - 1, priv->apb_base + PCIE_ATR_OB_ADDR0(0));
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writel(0, priv->apb_base + PCIE_ATR_OB_ADDR1(0));
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writel(PCIE_ATR_HDR_CFG_TYPE0 | PCIE_ATR_HDR_RID,
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priv->apb_base + PCIE_ATR_OB_DESC0(0));
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writel(0, priv->apb_base + PCIE_ATR_OB_DESC1(0));
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for (i = 0; i < hose->region_count; i++) {
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if (hose->regions[i].flags == PCI_REGION_SYS_MEMORY)
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continue;
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if (hose->regions[i].flags == PCI_REGION_IO)
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type = PCIE_ATR_HDR_IO;
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else
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type = PCIE_ATR_HDR_MEM;
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/* Only support identity mappings. */
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if (hose->regions[i].bus_start !=
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hose->regions[i].phys_start)
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return -EINVAL;
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/* Only support mappings aligned on a region boundary. */
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addr = hose->regions[i].bus_start;
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if (addr & (PCIE_ATR_OB_REGION_SIZE - 1))
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return -EINVAL;
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/* Mappings should lie between AXI and APB regions. */
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size = hose->regions[i].size;
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if (addr < (u64)priv->axi_base + PCIE_ATR_OB_REGION0_SIZE)
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return -EINVAL;
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if (addr + size > (u64)priv->apb_base)
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return -EINVAL;
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offset = addr - (u64)priv->axi_base - PCIE_ATR_OB_REGION0_SIZE;
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region = 1 + (offset / PCIE_ATR_OB_REGION_SIZE);
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while (size > 0) {
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writel(32 - 1,
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priv->apb_base + PCIE_ATR_OB_ADDR0(region));
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writel(0, priv->apb_base + PCIE_ATR_OB_ADDR1(region));
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writel(type | PCIE_ATR_HDR_RID,
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priv->apb_base + PCIE_ATR_OB_DESC0(region));
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writel(0, priv->apb_base + PCIE_ATR_OB_DESC1(region));
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addr += PCIE_ATR_OB_REGION_SIZE;
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size -= PCIE_ATR_OB_REGION_SIZE;
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region++;
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}
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}
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/* Passthrough inbound translations unmodified. */
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writel(32 - 1, priv->apb_base + PCIE_ATR_IB_ADDR0(2));
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writel(0, priv->apb_base + PCIE_ATR_IB_ADDR1(2));
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return 0;
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}
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static int rockchip_pcie_init_port(struct udevice *dev)
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{
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struct rockchip_pcie *priv = dev_get_priv(dev);
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u32 cr, val, status;
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int ret;
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if (dm_gpio_is_valid(&priv->ep_gpio))
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dm_gpio_set_value(&priv->ep_gpio, 0);
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ret = reset_assert(&priv->aclk_rst);
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if (ret) {
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dev_err(dev, "failed to assert aclk reset (ret=%d)\n", ret);
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return ret;
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}
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ret = reset_assert(&priv->pclk_rst);
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if (ret) {
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dev_err(dev, "failed to assert pclk reset (ret=%d)\n", ret);
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return ret;
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}
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ret = reset_assert(&priv->pm_rst);
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if (ret) {
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dev_err(dev, "failed to assert pm reset (ret=%d)\n", ret);
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return ret;
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}
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ret = generic_phy_init(&priv->pcie_phy);
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if (ret) {
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dev_err(dev, "failed to init phy (ret=%d)\n", ret);
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goto err_exit_phy;
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}
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ret = reset_assert(&priv->core_rst);
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if (ret) {
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dev_err(dev, "failed to assert core reset (ret=%d)\n", ret);
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goto err_exit_phy;
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}
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ret = reset_assert(&priv->mgmt_rst);
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if (ret) {
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dev_err(dev, "failed to assert mgmt reset (ret=%d)\n", ret);
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goto err_exit_phy;
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}
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ret = reset_assert(&priv->mgmt_sticky_rst);
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if (ret) {
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dev_err(dev, "failed to assert mgmt-sticky reset (ret=%d)\n",
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ret);
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goto err_exit_phy;
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}
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ret = reset_assert(&priv->pipe_rst);
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if (ret) {
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dev_err(dev, "failed to assert pipe reset (ret=%d)\n", ret);
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goto err_exit_phy;
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}
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udelay(10);
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ret = reset_deassert(&priv->pm_rst);
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if (ret) {
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dev_err(dev, "failed to deassert pm reset (ret=%d)\n", ret);
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goto err_exit_phy;
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}
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ret = reset_deassert(&priv->aclk_rst);
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if (ret) {
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dev_err(dev, "failed to deassert aclk reset (ret=%d)\n", ret);
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goto err_exit_phy;
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}
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ret = reset_deassert(&priv->pclk_rst);
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if (ret) {
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dev_err(dev, "failed to deassert pclk reset (ret=%d)\n", ret);
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goto err_exit_phy;
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}
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/* Select GEN1 for now */
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cr = PCIE_CLIENT_GEN_SEL_1;
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/* Set Root complex mode */
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cr |= PCIE_CLIENT_CONF_ENABLE | PCIE_CLIENT_MODE_RC;
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writel(cr, priv->apb_base + PCIE_CLIENT_CONFIG);
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ret = generic_phy_power_on(&priv->pcie_phy);
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if (ret) {
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dev_err(dev, "failed to power on phy (ret=%d)\n", ret);
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goto err_power_off_phy;
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}
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ret = reset_deassert(&priv->mgmt_sticky_rst);
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if (ret) {
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dev_err(dev, "failed to deassert mgmt-sticky reset (ret=%d)\n",
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ret);
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goto err_power_off_phy;
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}
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ret = reset_deassert(&priv->core_rst);
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if (ret) {
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dev_err(dev, "failed to deassert core reset (ret=%d)\n", ret);
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goto err_power_off_phy;
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}
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ret = reset_deassert(&priv->mgmt_rst);
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if (ret) {
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dev_err(dev, "failed to deassert mgmt reset (ret=%d)\n", ret);
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goto err_power_off_phy;
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}
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ret = reset_deassert(&priv->pipe_rst);
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if (ret) {
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dev_err(dev, "failed to deassert pipe reset (ret=%d)\n", ret);
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goto err_power_off_phy;
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}
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/* Enable Gen1 training */
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writel(PCIE_CLIENT_LINK_TRAIN_ENABLE,
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priv->apb_base + PCIE_CLIENT_CONFIG);
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if (dm_gpio_is_valid(&priv->ep_gpio))
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dm_gpio_set_value(&priv->ep_gpio, 1);
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ret = readl_poll_sleep_timeout
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(priv->apb_base + PCIE_CLIENT_BASIC_STATUS1,
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status, PCIE_LINK_UP(status), 20, 500 * 1000);
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if (ret) {
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dev_err(dev, "PCIe link training gen1 timeout!\n");
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goto err_power_off_phy;
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}
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/* Initialize Root Complex registers. */
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writel(PCIE_LM_VENDOR_ROCKCHIP, priv->apb_base + PCIE_LM_VENDOR_ID);
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writel(PCI_CLASS_BRIDGE_PCI << 16,
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priv->apb_base + PCIE_RC_BASE + PCI_CLASS_REVISION);
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writel(PCIE_LM_RCBARPIE | PCIE_LM_RCBARPIS,
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priv->apb_base + PCIE_LM_RCBAR);
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if (dev_read_bool(dev, "aspm-no-l0s")) {
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val = readl(priv->apb_base + PCIE_RC_PCIE_LCAP);
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val &= ~PCIE_RC_PCIE_LCAP_APMS_L0S;
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writel(val, priv->apb_base + PCIE_RC_PCIE_LCAP);
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}
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/* Configure Address Translation. */
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ret = rockchip_pcie_atr_init(priv);
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if (ret) {
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dev_err(dev, "PCIE-%d: ATR init failed\n", dev_seq(dev));
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goto err_power_off_phy;
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}
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return 0;
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err_power_off_phy:
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generic_phy_power_off(&priv->pcie_phy);
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err_exit_phy:
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generic_phy_exit(&priv->pcie_phy);
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return ret;
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}
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static int rockchip_pcie_set_vpcie(struct udevice *dev)
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{
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struct rockchip_pcie *priv = dev_get_priv(dev);
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int ret;
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if (priv->vpcie3v3) {
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ret = regulator_set_enable(priv->vpcie3v3, true);
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if (ret) {
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dev_err(dev, "failed to enable vpcie3v3 (ret=%d)\n",
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ret);
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return ret;
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}
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}
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if (priv->vpcie1v8) {
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ret = regulator_set_enable(priv->vpcie1v8, true);
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if (ret) {
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dev_err(dev, "failed to enable vpcie1v8 (ret=%d)\n",
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ret);
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goto err_disable_3v3;
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}
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}
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if (priv->vpcie0v9) {
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ret = regulator_set_enable(priv->vpcie0v9, true);
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if (ret) {
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dev_err(dev, "failed to enable vpcie0v9 (ret=%d)\n",
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ret);
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goto err_disable_1v8;
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}
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}
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return 0;
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err_disable_1v8:
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if (priv->vpcie1v8)
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regulator_set_enable(priv->vpcie1v8, false);
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err_disable_3v3:
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if (priv->vpcie3v3)
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regulator_set_enable(priv->vpcie3v3, false);
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return ret;
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}
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static int rockchip_pcie_parse_dt(struct udevice *dev)
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{
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struct rockchip_pcie *priv = dev_get_priv(dev);
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int ret;
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priv->axi_base = dev_read_addr_name(dev, "axi-base");
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if (!priv->axi_base)
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return -ENODEV;
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priv->apb_base = dev_read_addr_name(dev, "apb-base");
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if (!priv->axi_base)
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return -ENODEV;
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ret = gpio_request_by_name(dev, "ep-gpios", 0,
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&priv->ep_gpio, GPIOD_IS_OUT);
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if (ret) {
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dev_err(dev, "failed to find ep-gpios property\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = reset_get_by_name(dev, "core", &priv->core_rst);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get core reset (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = reset_get_by_name(dev, "mgmt", &priv->mgmt_rst);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get mgmt reset (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = reset_get_by_name(dev, "mgmt-sticky", &priv->mgmt_sticky_rst);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get mgmt-sticky reset (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = reset_get_by_name(dev, "pipe", &priv->pipe_rst);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get pipe reset (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = reset_get_by_name(dev, "pm", &priv->pm_rst);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get pm reset (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = reset_get_by_name(dev, "pclk", &priv->pclk_rst);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get pclk reset (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = reset_get_by_name(dev, "aclk", &priv->aclk_rst);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get aclk reset (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = device_get_supply_regulator(dev, "vpcie3v3-supply",
|
|
&priv->vpcie3v3);
|
|
if (ret && ret != -ENOENT) {
|
|
dev_err(dev, "failed to get vpcie3v3 supply (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = device_get_supply_regulator(dev, "vpcie1v8-supply",
|
|
&priv->vpcie1v8);
|
|
if (ret && ret != -ENOENT) {
|
|
dev_err(dev, "failed to get vpcie1v8 supply (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = device_get_supply_regulator(dev, "vpcie0v9-supply",
|
|
&priv->vpcie0v9);
|
|
if (ret && ret != -ENOENT) {
|
|
dev_err(dev, "failed to get vpcie0v9 supply (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = generic_phy_get_by_index(dev, 0, &priv->pcie_phy);
|
|
if (ret) {
|
|
dev_err(dev, "failed to get pcie-phy (ret=%d)\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rockchip_pcie_probe(struct udevice *dev)
|
|
{
|
|
struct rockchip_pcie *priv = dev_get_priv(dev);
|
|
struct udevice *ctlr = pci_get_controller(dev);
|
|
struct pci_controller *hose = dev_get_uclass_priv(ctlr);
|
|
int ret;
|
|
|
|
priv->first_busno = dev_seq(dev);
|
|
priv->dev = dev;
|
|
|
|
ret = rockchip_pcie_parse_dt(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = rockchip_pcie_set_vpcie(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = rockchip_pcie_init_port(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dev_info(dev, "PCIE-%d: Link up (Bus%d)\n",
|
|
dev_seq(dev), hose->first_busno);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dm_pci_ops rockchip_pcie_ops = {
|
|
.read_config = rockchip_pcie_rd_conf,
|
|
.write_config = rockchip_pcie_wr_conf,
|
|
};
|
|
|
|
static const struct udevice_id rockchip_pcie_ids[] = {
|
|
{ .compatible = "rockchip,rk3399-pcie" },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(rockchip_pcie) = {
|
|
.name = "rockchip_pcie",
|
|
.id = UCLASS_PCI,
|
|
.of_match = rockchip_pcie_ids,
|
|
.ops = &rockchip_pcie_ops,
|
|
.probe = rockchip_pcie_probe,
|
|
.priv_auto = sizeof(struct rockchip_pcie),
|
|
};
|