From: Minghuan Lian Minghuan.Lian@nxp.com
There are more than five kinds of Layerscape SoCs. unfortunately, PCIe controller of each SoC is a little bit different. In order to avoid too many macro definitions, the patch addes a new implementation of PCIe driver based on DM. PCIe dts node is used to describe the difference.
Signed-off-by: Minghuan Lian Minghuan.Lian@nxp.com Signed-off-by: Hou Zhiqiang Zhiqiang.Hou@nxp.com Reviewed-by: Simon Glass sjg@chromium.org --- V5: - Generated the patch base on the separated pci driver file and kernel DT fixup file.
drivers/pci/Kconfig | 8 + drivers/pci/pcie_layerscape.c | 540 ++++++++++++++++++++++++++++++++++++ drivers/pci/pcie_layerscape.h | 56 ++++ drivers/pci/pcie_layerscape_fixup.c | 150 ++++++++++ 4 files changed, 754 insertions(+)
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index ff2c370..e5791ec 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -71,4 +71,12 @@ config PCI_XILINX Enable support for the Xilinx AXI bridge for PCI express, an IP block which can be used on some generations of Xilinx FPGAs.
+config PCIE_LAYERSCAPE + bool "Layerscape PCIe support" + depends on DM_PCI + help + Support Layerscape PCIe. The Layerscape SoC may have one or several + PCIe controllers. The PCIe may works in RC or EP mode according to + RCW[HOST_AGT_PEX] setting. + endif diff --git a/drivers/pci/pcie_layerscape.c b/drivers/pci/pcie_layerscape.c index 0e3b494..62a0316 100644 --- a/drivers/pci/pcie_layerscape.c +++ b/drivers/pci/pcie_layerscape.c @@ -11,6 +11,7 @@ #include <asm/io.h> #include <errno.h> #include <malloc.h> +#include <dm.h> #ifndef CONFIG_LS102XA #include <asm/arch/fdt.h> #include <asm/arch/soc.h> @@ -19,6 +20,9 @@ #endif #include "pcie_layerscape.h"
+DECLARE_GLOBAL_DATA_PTR; + +#ifndef CONFIG_DM_PCI #ifdef CONFIG_LS102XA /* PEX1/2 Misc Ports Status Register */ #define LTSSM_STATE_SHIFT 20 @@ -506,3 +510,539 @@ void pci_init_board(void) { ls_pcie_init_board(0); } + +#else +LIST_HEAD(ls_pcie_list); + +static unsigned int dbi_readl(struct ls_pcie *pcie, unsigned int offset) +{ + return in_le32(pcie->dbi + offset); +} + +static void dbi_writel(struct ls_pcie *pcie, unsigned int value, + unsigned int offset) +{ + out_le32(pcie->dbi + offset, value); +} + +static unsigned int ctrl_readl(struct ls_pcie *pcie, unsigned int offset) +{ + if (pcie->big_endian) + return in_be32(pcie->ctrl + offset); + else + return in_le32(pcie->ctrl + offset); +} + +static void ctrl_writel(struct ls_pcie *pcie, unsigned int value, + unsigned int offset) +{ + if (pcie->big_endian) + out_be32(pcie->ctrl + offset, value); + else + out_le32(pcie->ctrl + offset, value); +} + +static int ls_pcie_ltssm(struct ls_pcie *pcie) +{ + u32 state; + uint svr; + + svr = get_svr(); + if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) { + state = ctrl_readl(pcie, LS1021_PEXMSCPORTSR(pcie->idx)); + state = (state >> LS1021_LTSSM_STATE_SHIFT) & LTSSM_STATE_MASK; + } else { + state = ctrl_readl(pcie, PCIE_PF_DBG) & LTSSM_STATE_MASK; + } + + return state; +} + +static int ls_pcie_link_up(struct ls_pcie *pcie) +{ + int ltssm; + + ltssm = ls_pcie_ltssm(pcie); + if (ltssm < LTSSM_PCIE_L0) + return 0; + + return 1; +} + +static void ls_pcie_cfg0_set_busdev(struct ls_pcie *pcie, u32 busdev) +{ + dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0, + PCIE_ATU_VIEWPORT); + dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET); +} + +static void ls_pcie_cfg1_set_busdev(struct ls_pcie *pcie, u32 busdev) +{ + dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1, + PCIE_ATU_VIEWPORT); + dbi_writel(pcie, busdev, PCIE_ATU_LOWER_TARGET); +} + +static void ls_pcie_atu_outbound_set(struct ls_pcie *pcie, int idx, int type, + u64 phys, u64 bus_addr, pci_size_t size) +{ + dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | idx, PCIE_ATU_VIEWPORT); + dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_BASE); + dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_BASE); + dbi_writel(pcie, (u32)phys + size - 1, PCIE_ATU_LIMIT); + dbi_writel(pcie, (u32)bus_addr, PCIE_ATU_LOWER_TARGET); + dbi_writel(pcie, bus_addr >> 32, PCIE_ATU_UPPER_TARGET); + dbi_writel(pcie, type, PCIE_ATU_CR1); + dbi_writel(pcie, PCIE_ATU_ENABLE, PCIE_ATU_CR2); +} + +/* Use bar match mode and MEM type as default */ +static void ls_pcie_atu_inbound_set(struct ls_pcie *pcie, int idx, + int bar, u64 phys) +{ + dbi_writel(pcie, PCIE_ATU_REGION_INBOUND | idx, PCIE_ATU_VIEWPORT); + dbi_writel(pcie, (u32)phys, PCIE_ATU_LOWER_TARGET); + dbi_writel(pcie, phys >> 32, PCIE_ATU_UPPER_TARGET); + dbi_writel(pcie, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1); + dbi_writel(pcie, PCIE_ATU_ENABLE | PCIE_ATU_BAR_MODE_ENABLE | + PCIE_ATU_BAR_NUM(bar), PCIE_ATU_CR2); +} + +static void ls_pcie_dump_atu(struct ls_pcie *pcie) +{ + int i; + + for (i = 0; i < PCIE_ATU_REGION_NUM; i++) { + dbi_writel(pcie, PCIE_ATU_REGION_OUTBOUND | i, + PCIE_ATU_VIEWPORT); + debug("iATU%d:\n", i); + debug("\tLOWER PHYS 0x%08x\n", + dbi_readl(pcie, PCIE_ATU_LOWER_BASE)); + debug("\tUPPER PHYS 0x%08x\n", + dbi_readl(pcie, PCIE_ATU_UPPER_BASE)); + debug("\tLOWER BUS 0x%08x\n", + dbi_readl(pcie, PCIE_ATU_LOWER_TARGET)); + debug("\tUPPER BUS 0x%08x\n", + dbi_readl(pcie, PCIE_ATU_UPPER_TARGET)); + debug("\tLIMIT 0x%08x\n", + readl(pcie->dbi + PCIE_ATU_LIMIT)); + debug("\tCR1 0x%08x\n", + dbi_readl(pcie, PCIE_ATU_CR1)); + debug("\tCR2 0x%08x\n", + dbi_readl(pcie, PCIE_ATU_CR2)); + } +} + +static void ls_pcie_setup_atu(struct ls_pcie *pcie) +{ + struct pci_region *io, *mem, *pref; + unsigned long long offset = 0; + int idx = 0; + uint svr; + + svr = get_svr(); + if (((svr >> SVR_VAR_PER_SHIFT) & SVR_LS102XA_MASK) == SVR_LS102XA) { + offset = LS1021_PCIE_SPACE_OFFSET + + LS1021_PCIE_SPACE_SIZE * pcie->idx; + } + + /* ATU 0 : OUTBOUND : CFG0 */ + ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX0, + PCIE_ATU_TYPE_CFG0, + pcie->cfg_res.start + offset, + 0, + fdt_resource_size(&pcie->cfg_res) / 2); + /* ATU 1 : OUTBOUND : CFG1 */ + ls_pcie_atu_outbound_set(pcie, PCIE_ATU_REGION_INDEX1, + PCIE_ATU_TYPE_CFG1, + pcie->cfg_res.start + offset + + fdt_resource_size(&pcie->cfg_res) / 2, + 0, + fdt_resource_size(&pcie->cfg_res) / 2); + + pci_get_regions(pcie->bus, &io, &mem, &pref); + idx = PCIE_ATU_REGION_INDEX1 + 1; + + if (io) + /* ATU : OUTBOUND : IO */ + ls_pcie_atu_outbound_set(pcie, idx++, + PCIE_ATU_TYPE_IO, + io->phys_start + offset, + io->bus_start, + io->size); + + if (mem) + /* ATU : OUTBOUND : MEM */ + ls_pcie_atu_outbound_set(pcie, idx++, + PCIE_ATU_TYPE_MEM, + mem->phys_start + offset, + mem->bus_start, + mem->size); + + if (pref) + /* ATU : OUTBOUND : pref */ + ls_pcie_atu_outbound_set(pcie, idx++, + PCIE_ATU_TYPE_MEM, + pref->phys_start + offset, + pref->bus_start, + pref->size); + + ls_pcie_dump_atu(pcie); +} + +/* Return 0 if the address is valid, -errno if not valid */ +static int ls_pcie_addr_valid(struct ls_pcie *pcie, pci_dev_t bdf) +{ + struct udevice *bus = pcie->bus; + + if (!pcie->enabled) + return -ENXIO; + + if (PCI_BUS(bdf) < bus->seq) + return -EINVAL; + + if ((PCI_BUS(bdf) > bus->seq) && (!ls_pcie_link_up(pcie))) + return -EINVAL; + + if (PCI_BUS(bdf) <= (bus->seq + 1) && (PCI_DEV(bdf) > 0)) + return -EINVAL; + + return 0; +} + +void *ls_pcie_conf_address(struct ls_pcie *pcie, pci_dev_t bdf, + int offset) +{ + struct udevice *bus = pcie->bus; + u32 busdev; + + if (PCI_BUS(bdf) == bus->seq) + return pcie->dbi + offset; + + busdev = PCIE_ATU_BUS(PCI_BUS(bdf)) | + PCIE_ATU_DEV(PCI_DEV(bdf)) | + PCIE_ATU_FUNC(PCI_FUNC(bdf)); + + if (PCI_BUS(bdf) == bus->seq + 1) { + ls_pcie_cfg0_set_busdev(pcie, busdev); + return pcie->cfg0 + offset; + } else { + ls_pcie_cfg1_set_busdev(pcie, busdev); + return pcie->cfg1 + offset; + } +} + +static int ls_pcie_read_config(struct udevice *bus, pci_dev_t bdf, + uint offset, ulong *valuep, + enum pci_size_t size) +{ + struct ls_pcie *pcie = dev_get_priv(bus); + void *address; + + if (ls_pcie_addr_valid(pcie, bdf)) { + *valuep = pci_get_ff(size); + return 0; + } + + address = ls_pcie_conf_address(pcie, bdf, offset); + + switch (size) { + case PCI_SIZE_8: + *valuep = readb(address); + return 0; + case PCI_SIZE_16: + *valuep = readw(address); + return 0; + case PCI_SIZE_32: + *valuep = readl(address); + return 0; + default: + return -EINVAL; + } +} + +static int ls_pcie_write_config(struct udevice *bus, pci_dev_t bdf, + uint offset, ulong value, + enum pci_size_t size) +{ + struct ls_pcie *pcie = dev_get_priv(bus); + void *address; + + if (ls_pcie_addr_valid(pcie, bdf)) + return 0; + + address = ls_pcie_conf_address(pcie, bdf, offset); + + switch (size) { + case PCI_SIZE_8: + writeb(value, address); + return 0; + case PCI_SIZE_16: + writew(value, address); + return 0; + case PCI_SIZE_32: + writel(value, address); + return 0; + default: + return -EINVAL; + } +} + +/* Clear multi-function bit */ +static void ls_pcie_clear_multifunction(struct ls_pcie *pcie) +{ + writeb(PCI_HEADER_TYPE_BRIDGE, pcie->dbi + PCI_HEADER_TYPE); +} + +/* Fix class value */ +static void ls_pcie_fix_class(struct ls_pcie *pcie) +{ + writew(PCI_CLASS_BRIDGE_PCI, pcie->dbi + PCI_CLASS_DEVICE); +} + +/* Drop MSG TLP except for Vendor MSG */ +static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie) +{ + u32 val; + + val = dbi_readl(pcie, PCIE_STRFMR1); + val &= 0xDFFFFFFF; + dbi_writel(pcie, val, PCIE_STRFMR1); +} + +/* Disable all bars in RC mode */ +static void ls_pcie_disable_bars(struct ls_pcie *pcie) +{ + u32 sriov; + + sriov = in_le32(pcie->dbi + PCIE_SRIOV); + + /* + * TODO: For PCIe controller with SRIOV, the method to disable bars + * is different and more complex, so will add later. + */ + if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) + return; + + dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_0); + dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_BASE_ADDRESS_1); + dbi_writel(pcie, 0, PCIE_CS2_OFFSET + PCI_ROM_ADDRESS1); +} + +static void ls_pcie_setup_ctrl(struct ls_pcie *pcie) +{ + ls_pcie_setup_atu(pcie); + + dbi_writel(pcie, 1, PCIE_DBI_RO_WR_EN); + ls_pcie_fix_class(pcie); + ls_pcie_clear_multifunction(pcie); + ls_pcie_drop_msg_tlp(pcie); + dbi_writel(pcie, 0, PCIE_DBI_RO_WR_EN); + + ls_pcie_disable_bars(pcie); +} + +static void ls_pcie_ep_setup_atu(struct ls_pcie *pcie) +{ + u64 phys = CONFIG_SYS_PCI_EP_MEMORY_BASE; + + /* ATU 0 : INBOUND : map BAR0 */ + ls_pcie_atu_inbound_set(pcie, 0, 0, phys); + /* ATU 1 : INBOUND : map BAR1 */ + phys += PCIE_BAR1_SIZE; + ls_pcie_atu_inbound_set(pcie, 1, 1, phys); + /* ATU 2 : INBOUND : map BAR2 */ + phys += PCIE_BAR2_SIZE; + ls_pcie_atu_inbound_set(pcie, 2, 2, phys); + /* ATU 3 : INBOUND : map BAR4 */ + phys = CONFIG_SYS_PCI_EP_MEMORY_BASE + PCIE_BAR4_SIZE; + ls_pcie_atu_inbound_set(pcie, 3, 4, phys); + + /* ATU 0 : OUTBOUND : map MEM */ + ls_pcie_atu_outbound_set(pcie, 0, + PCIE_ATU_TYPE_MEM, + pcie->cfg_res.start, + 0, + CONFIG_SYS_PCI_MEMORY_SIZE); +} + +/* BAR0 and BAR1 are 32bit BAR2 and BAR4 are 64bit */ +static void ls_pcie_ep_setup_bar(void *bar_base, int bar, u32 size) +{ + /* The least inbound window is 4KiB */ + if (size < 4 * 1024) + return; + + switch (bar) { + case 0: + writel(size - 1, bar_base + PCI_BASE_ADDRESS_0); + break; + case 1: + writel(size - 1, bar_base + PCI_BASE_ADDRESS_1); + break; + case 2: + writel(size - 1, bar_base + PCI_BASE_ADDRESS_2); + writel(0, bar_base + PCI_BASE_ADDRESS_3); + break; + case 4: + writel(size - 1, bar_base + PCI_BASE_ADDRESS_4); + writel(0, bar_base + PCI_BASE_ADDRESS_5); + break; + default: + break; + } +} + +static void ls_pcie_ep_setup_bars(void *bar_base) +{ + /* BAR0 - 32bit - 4K configuration */ + ls_pcie_ep_setup_bar(bar_base, 0, PCIE_BAR0_SIZE); + /* BAR1 - 32bit - 8K MSIX*/ + ls_pcie_ep_setup_bar(bar_base, 1, PCIE_BAR1_SIZE); + /* BAR2 - 64bit - 4K MEM desciptor */ + ls_pcie_ep_setup_bar(bar_base, 2, PCIE_BAR2_SIZE); + /* BAR4 - 64bit - 1M MEM*/ + ls_pcie_ep_setup_bar(bar_base, 4, PCIE_BAR4_SIZE); +} + +static void ls_pcie_setup_ep(struct ls_pcie *pcie) +{ + u32 sriov; + + sriov = readl(pcie->dbi + PCIE_SRIOV); + if (PCI_EXT_CAP_ID(sriov) == PCI_EXT_CAP_ID_SRIOV) { + int pf, vf; + + for (pf = 0; pf < PCIE_PF_NUM; pf++) { + for (vf = 0; vf <= PCIE_VF_NUM; vf++) { + ctrl_writel(pcie, PCIE_LCTRL0_VAL(pf, vf), + PCIE_PF_VF_CTRL); + + ls_pcie_ep_setup_bars(pcie->dbi); + ls_pcie_ep_setup_atu(pcie); + } + } + /* Disable CFG2 */ + ctrl_writel(pcie, 0, PCIE_PF_VF_CTRL); + } else { + ls_pcie_ep_setup_bars(pcie->dbi + PCIE_NO_SRIOV_BAR_BASE); + ls_pcie_ep_setup_atu(pcie); + } +} + +static int ls_pcie_probe(struct udevice *dev) +{ + struct ls_pcie *pcie = dev_get_priv(dev); + const void *fdt = gd->fdt_blob; + int node = dev->of_offset; + u8 header_type; + u16 link_sta; + bool ep_mode; + int ret; + + pcie->bus = dev; + + ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", + "dbi", &pcie->dbi_res); + if (ret) { + printf("ls-pcie: resource "dbi" not found\n"); + return ret; + } + + pcie->idx = (pcie->dbi_res.start - PCIE_SYS_BASE_ADDR) / PCIE_CCSR_SIZE; + + list_add(&pcie->list, &ls_pcie_list); + + pcie->enabled = is_serdes_configured(PCIE_SRDS_PRTCL(pcie->idx)); + if (!pcie->enabled) { + printf("PCIe%d: %s disabled\n", pcie->idx, dev->name); + return 0; + } + + pcie->dbi = map_physmem(pcie->dbi_res.start, + fdt_resource_size(&pcie->dbi_res), + MAP_NOCACHE); + + ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", + "lut", &pcie->lut_res); + if (!ret) + pcie->lut = map_physmem(pcie->lut_res.start, + fdt_resource_size(&pcie->lut_res), + MAP_NOCACHE); + + ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", + "ctrl", &pcie->ctrl_res); + if (!ret) + pcie->ctrl = map_physmem(pcie->ctrl_res.start, + fdt_resource_size(&pcie->ctrl_res), + MAP_NOCACHE); + if (!pcie->ctrl) + pcie->ctrl = pcie->lut; + + if (!pcie->ctrl) { + printf("%s: NOT find CTRL\n", dev->name); + return -1; + } + + ret = fdt_get_named_resource(fdt, node, "reg", "reg-names", + "config", &pcie->cfg_res); + if (ret) { + printf("%s: resource "config" not found\n", dev->name); + return ret; + } + + pcie->cfg0 = map_physmem(pcie->cfg_res.start, + fdt_resource_size(&pcie->cfg_res), + MAP_NOCACHE); + pcie->cfg1 = pcie->cfg0 + fdt_resource_size(&pcie->cfg_res) / 2; + + pcie->big_endian = fdtdec_get_bool(fdt, node, "big-endian"); + + debug("%s dbi:%lx lut:%lx ctrl:0x%lx cfg0:0x%lx, big-endian:%d\n", + dev->name, (unsigned long)pcie->dbi, (unsigned long)pcie->lut, + (unsigned long)pcie->ctrl, (unsigned long)pcie->cfg0, + pcie->big_endian); + + header_type = readb(pcie->dbi + PCI_HEADER_TYPE); + ep_mode = (header_type & 0x7f) == PCI_HEADER_TYPE_NORMAL; + printf("PCIe%u: %s %s", pcie->idx, dev->name, + ep_mode ? "Endpoint" : "Root Complex"); + + if (ep_mode) + ls_pcie_setup_ep(pcie); + else + ls_pcie_setup_ctrl(pcie); + + if (!ls_pcie_link_up(pcie)) { + /* Let the user know there's no PCIe link */ + printf(": no link\n"); + return 0; + } + + /* Print the negotiated PCIe link width */ + link_sta = readw(pcie->dbi + PCIE_LINK_STA); + printf(": x%d gen%d\n", (link_sta & PCIE_LINK_WIDTH_MASK) >> 4, + link_sta & PCIE_LINK_SPEED_MASK); + + return 0; +} + +static const struct dm_pci_ops ls_pcie_ops = { + .read_config = ls_pcie_read_config, + .write_config = ls_pcie_write_config, +}; + +static const struct udevice_id ls_pcie_ids[] = { + { .compatible = "fsl,ls-pcie" }, + { } +}; + +U_BOOT_DRIVER(pci_layerscape) = { + .name = "pci_layerscape", + .id = UCLASS_PCI, + .of_match = ls_pcie_ids, + .ops = &ls_pcie_ops, + .probe = ls_pcie_probe, + .priv_auto_alloc_size = sizeof(struct ls_pcie), +}; +#endif /* CONFIG_DM_PCI */ diff --git a/drivers/pci/pcie_layerscape.h b/drivers/pci/pcie_layerscape.h index 159e5ce..5e893d4 100644 --- a/drivers/pci/pcie_layerscape.h +++ b/drivers/pci/pcie_layerscape.h @@ -86,6 +86,7 @@ #define PCIE_BAR2_SIZE (4 * 1024) /* 4K */ #define PCIE_BAR4_SIZE (1 * 1024 * 1024) /* 1M */
+#ifndef CONFIG_DM_PCI struct ls_pcie { int idx; void __iomem *dbi; @@ -132,4 +133,59 @@ struct ls_pcie_info { x.pci_num = num; \ }
+#else /* CONFIG_DM_PCI */ + +#include <dm.h> + +/* LUT registers */ +#define PCIE_LUT_UDR(n) (0x800 + (n) * 8) +#define PCIE_LUT_LDR(n) (0x804 + (n) * 8) +#define PCIE_LUT_ENABLE (1 << 31) +#define PCIE_LUT_ENTRY_COUNT 32 + +/* PF Controll registers */ +#define PCIE_PF_VF_CTRL 0x7F8 +#define PCIE_PF_DBG 0x7FC + +#define PCIE_SRDS_PRTCL(idx) (PCIE1 + (idx)) +#define PCIE_SYS_BASE_ADDR 0x3400000 +#define PCIE_CCSR_SIZE 0x0100000 + +/* CS2 */ +#define PCIE_CS2_OFFSET 0x1000 /* For PCIe without SR-IOV */ + +#define SVR_LS102XA 0 +#define SVR_VAR_PER_SHIFT 8 +#define SVR_LS102XA_MASK 0x700 + +/* LS1021a PCIE space */ +#define LS1021_PCIE_SPACE_OFFSET 0x4000000000ULL +#define LS1021_PCIE_SPACE_SIZE 0x0800000000ULL + +/* LS1021a PEX1/2 Misc Ports Status Register */ +#define LS1021_PEXMSCPORTSR(pex_idx) (0x94 + (pex_idx) * 4) +#define LS1021_LTSSM_STATE_SHIFT 20 + +struct ls_pcie { + int idx; + struct list_head list; + struct udevice *bus; + struct fdt_resource dbi_res; + struct fdt_resource lut_res; + struct fdt_resource ctrl_res; + struct fdt_resource cfg_res; + void __iomem *dbi; + void __iomem *lut; + void __iomem *ctrl; + void __iomem *cfg0; + void __iomem *cfg1; + bool big_endian; + bool enabled; + int next_lut_index; + struct pci_controller hose; +}; + +extern struct list_head ls_pcie_list; + +#endif /* CONFIG_DM_PCI */ #endif /* _PCIE_LAYERSCAPE_H_ */ diff --git a/drivers/pci/pcie_layerscape_fixup.c b/drivers/pci/pcie_layerscape_fixup.c index 6de9355..c30a330 100644 --- a/drivers/pci/pcie_layerscape_fixup.c +++ b/drivers/pci/pcie_layerscape_fixup.c @@ -37,7 +37,11 @@ static int ls_pcie_next_streamid(void)
return next_stream_id++; } +#endif + +#ifndef CONFIG_DM_PCI
+#ifdef CONFIG_FSL_LSCH3 /* * Program a single LUT entry */ @@ -197,6 +201,152 @@ void ft_pci_setup(void *blob, bd_t *bd) #endif }
+#else /* CONFIG_DM_PCI */ + +#ifdef CONFIG_FSL_LSCH3 +static void lut_writel(struct ls_pcie *pcie, unsigned int value, + unsigned int offset) +{ + if (pcie->big_endian) + out_be32(pcie->lut + offset, value); + else + out_le32(pcie->lut + offset, value); +} + +/* + * Program a single LUT entry + */ +static void ls_pcie_lut_set_mapping(struct ls_pcie *pcie, int index, u32 devid, + u32 streamid) +{ + /* leave mask as all zeroes, want to match all bits */ + lut_writel(pcie, devid << 16, PCIE_LUT_UDR(index)); + lut_writel(pcie, streamid | PCIE_LUT_ENABLE, PCIE_LUT_LDR(index)); +} + +/* + * An msi-map is a property to be added to the pci controller + * node. It is a table, where each entry consists of 4 fields + * e.g.: + * + * msi-map = <[devid] [phandle-to-msi-ctrl] [stream-id] [count] + * [devid] [phandle-to-msi-ctrl] [stream-id] [count]>; + */ +static void fdt_pcie_set_msi_map_entry(void *blob, struct ls_pcie *pcie, + u32 devid, u32 streamid) +{ + u32 *prop; + u32 phandle; + int nodeoffset; + + /* find pci controller node */ + nodeoffset = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie", + pcie->dbi_res.start); + if (nodeoffset < 0) { +#ifdef FSL_PCIE_COMPAT /* Compatible with older version of dts node */ + nodeoffset = fdt_node_offset_by_compat_reg(blob, + FSL_PCIE_COMPAT, pcie->dbi_res.start); + if (nodeoffset < 0) + return; +#else + return; +#endif + } + + /* get phandle to MSI controller */ + prop = (u32 *)fdt_getprop(blob, nodeoffset, "msi-parent", 0); + if (prop == NULL) { + debug("\n%s: ERROR: missing msi-parent: PCIe%d\n", + __func__, pcie->idx); + return; + } + phandle = fdt32_to_cpu(*prop); + + /* set one msi-map row */ + fdt_appendprop_u32(blob, nodeoffset, "msi-map", devid); + fdt_appendprop_u32(blob, nodeoffset, "msi-map", phandle); + fdt_appendprop_u32(blob, nodeoffset, "msi-map", streamid); + fdt_appendprop_u32(blob, nodeoffset, "msi-map", 1); +} + +static void fdt_fixup_pcie(void *blob) +{ + struct udevice *dev, *bus; + struct ls_pcie *pcie; + int streamid; + int index; + pci_dev_t bdf; + + /* Scan all known buses */ + for (pci_find_first_device(&dev); + dev; + pci_find_next_device(&dev)) { + for (bus = dev; device_is_on_pci_bus(bus);) + bus = bus->parent; + pcie = dev_get_priv(bus); + + streamid = ls_pcie_next_streamid(); + if (streamid < 0) { + debug("ERROR: no stream ids free\n"); + continue; + } + + index = ls_pcie_next_lut_index(pcie); + if (index < 0) { + debug("ERROR: no LUT indexes free\n"); + continue; + } + + /* the DT fixup must be relative to the hose first_busno */ + bdf = dm_pci_get_bdf(dev) - PCI_BDF(bus->seq, 0, 0); + /* map PCI b.d.f to streamID in LUT */ + ls_pcie_lut_set_mapping(pcie, index, bdf >> 8, + streamid); + /* update msi-map in device tree */ + fdt_pcie_set_msi_map_entry(blob, pcie, bdf >> 8, + streamid); + } +} +#endif + +static void ft_pcie_ls_setup(void *blob, struct ls_pcie *pcie) +{ + int off; + + off = fdt_node_offset_by_compat_reg(blob, "fsl,ls-pcie", + pcie->dbi_res.start); + if (off < 0) { +#ifdef FSL_PCIE_COMPAT /* Compatible with older version of dts node */ + off = fdt_node_offset_by_compat_reg(blob, + FSL_PCIE_COMPAT, + pcie->dbi_res.start); + if (off < 0) + return; +#else + return; +#endif + } + + if (pcie->enabled) + fdt_set_node_status(blob, off, FDT_STATUS_OKAY, 0); + else + fdt_set_node_status(blob, off, FDT_STATUS_DISABLED, 0); +} + +/* Fixup Kernel DT for PCIe */ +void ft_pci_setup(void *blob, bd_t *bd) +{ + struct ls_pcie *pcie; + + list_for_each_entry(pcie, &ls_pcie_list, list) + ft_pcie_ls_setup(blob, pcie); + +#ifdef CONFIG_FSL_LSCH3 + fdt_fixup_pcie(blob); +#endif +} +#endif /* CONFIG_DM_PCI */ + #else /* !CONFIG_OF_BOARD_SETUP */ void ft_pci_setup(void *blob, bd_t *bd) {