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author | Rafał Miłecki <zajec5@gmail.com> | 2015-12-03 08:19:25 +0000 |
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committer | Rafał Miłecki <zajec5@gmail.com> | 2015-12-03 08:19:25 +0000 |
commit | d90561c92935122327bde8a1344389123fda9532 (patch) | |
tree | 91d4344fc9d0e70e42389d887b8b4b59d75e1885 /target/linux/bcm53xx/patches-4.4/151-PCI-iproc-Add-PAXC-interface-support.patch | |
parent | e395433178224ff1e2a6053105d12936b46c7576 (diff) | |
download | upstream-d90561c92935122327bde8a1344389123fda9532.tar.gz upstream-d90561c92935122327bde8a1344389123fda9532.tar.bz2 upstream-d90561c92935122327bde8a1344389123fda9532.zip |
bcm53xx: add linux 4.4 support
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 47703
Diffstat (limited to 'target/linux/bcm53xx/patches-4.4/151-PCI-iproc-Add-PAXC-interface-support.patch')
-rw-r--r-- | target/linux/bcm53xx/patches-4.4/151-PCI-iproc-Add-PAXC-interface-support.patch | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-4.4/151-PCI-iproc-Add-PAXC-interface-support.patch b/target/linux/bcm53xx/patches-4.4/151-PCI-iproc-Add-PAXC-interface-support.patch new file mode 100644 index 0000000000..9b7b762241 --- /dev/null +++ b/target/linux/bcm53xx/patches-4.4/151-PCI-iproc-Add-PAXC-interface-support.patch @@ -0,0 +1,428 @@ +From a13fc4733b25d6dad6ec1826f09225c69ee21e3a Mon Sep 17 00:00:00 2001 +From: Ray Jui <rjui@broadcom.com> +Date: Mon, 16 Nov 2015 17:41:43 -0800 +Subject: [PATCH 151/154] PCI: iproc: Add PAXC interface support + +Traditionally, all iProc PCIe root complexes use PAXB based wrapper, +with an integrated on-chip Serdes to support external endpoint devices. +On newer iProc platforms, a PAXC based wrapper is introduced, for +connection with internally emulated PCIe endpoint devices in the ASIC + +This patch adds support for PAXC based iProc PCIe root complex in the +iProc PCIe core driver. This change fators out common logic between +PAXB and PAXC, and use tables to store register offsets that are +different between PAXB and PAXC. This allows the driver to be scaled to +support subsequent PAXC revisions in the future + +Signed-off-by: Ray Jui <rjui@broadcom.com> +Reviewed-by: Scott Branden <sbranden@broadcom.com> +--- + drivers/pci/host/pcie-iproc-platform.c | 24 +++- + drivers/pci/host/pcie-iproc.c | 202 +++++++++++++++++++++++++++------ + drivers/pci/host/pcie-iproc.h | 19 ++++ + 3 files changed, 205 insertions(+), 40 deletions(-) + +--- a/drivers/pci/host/pcie-iproc-platform.c ++++ b/drivers/pci/host/pcie-iproc-platform.c +@@ -26,8 +26,21 @@ + + #include "pcie-iproc.h" + ++static const struct of_device_id iproc_pcie_of_match_table[] = { ++ { ++ .compatible = "brcm,iproc-pcie", ++ .data = (int *)IPROC_PCIE_PAXB, ++ }, { ++ .compatible = "brcm,iproc-pcie-paxc", ++ .data = (int *)IPROC_PCIE_PAXC, ++ }, ++ { /* sentinel */ } ++}; ++MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table); ++ + static int iproc_pcie_pltfm_probe(struct platform_device *pdev) + { ++ const struct of_device_id *of_id; + struct iproc_pcie *pcie; + struct device_node *np = pdev->dev.of_node; + struct resource reg; +@@ -35,11 +48,16 @@ static int iproc_pcie_pltfm_probe(struct + LIST_HEAD(res); + int ret; + ++ of_id = of_match_device(iproc_pcie_of_match_table, &pdev->dev); ++ if (!of_id) ++ return -EINVAL; ++ + pcie = devm_kzalloc(&pdev->dev, sizeof(struct iproc_pcie), GFP_KERNEL); + if (!pcie) + return -ENOMEM; + + pcie->dev = &pdev->dev; ++ pcie->type = (enum iproc_pcie_type)of_id->data; + platform_set_drvdata(pdev, pcie); + + ret = of_address_to_resource(np, 0, ®); +@@ -114,12 +132,6 @@ static int iproc_pcie_pltfm_remove(struc + return iproc_pcie_remove(pcie); + } + +-static const struct of_device_id iproc_pcie_of_match_table[] = { +- { .compatible = "brcm,iproc-pcie", }, +- { /* sentinel */ } +-}; +-MODULE_DEVICE_TABLE(of, iproc_pcie_of_match_table); +- + static struct platform_driver iproc_pcie_pltfm_driver = { + .driver = { + .name = "iproc-pcie", +--- a/drivers/pci/host/pcie-iproc.c ++++ b/drivers/pci/host/pcie-iproc.c +@@ -30,20 +30,16 @@ + + #include "pcie-iproc.h" + +-#define CLK_CONTROL_OFFSET 0x000 + #define EP_PERST_SOURCE_SELECT_SHIFT 2 + #define EP_PERST_SOURCE_SELECT BIT(EP_PERST_SOURCE_SELECT_SHIFT) + #define EP_MODE_SURVIVE_PERST_SHIFT 1 + #define EP_MODE_SURVIVE_PERST BIT(EP_MODE_SURVIVE_PERST_SHIFT) + #define RC_PCIE_RST_OUTPUT_SHIFT 0 + #define RC_PCIE_RST_OUTPUT BIT(RC_PCIE_RST_OUTPUT_SHIFT) ++#define PAXC_RESET_MASK 0x7f + +-#define CFG_IND_ADDR_OFFSET 0x120 + #define CFG_IND_ADDR_MASK 0x00001ffc + +-#define CFG_IND_DATA_OFFSET 0x124 +- +-#define CFG_ADDR_OFFSET 0x1f8 + #define CFG_ADDR_BUS_NUM_SHIFT 20 + #define CFG_ADDR_BUS_NUM_MASK 0x0ff00000 + #define CFG_ADDR_DEV_NUM_SHIFT 15 +@@ -55,12 +51,8 @@ + #define CFG_ADDR_CFG_TYPE_SHIFT 0 + #define CFG_ADDR_CFG_TYPE_MASK 0x00000003 + +-#define CFG_DATA_OFFSET 0x1fc +- +-#define SYS_RC_INTX_EN 0x330 + #define SYS_RC_INTX_MASK 0xf + +-#define PCIE_LINK_STATUS_OFFSET 0xf0c + #define PCIE_PHYLINKUP_SHIFT 3 + #define PCIE_PHYLINKUP BIT(PCIE_PHYLINKUP_SHIFT) + #define PCIE_DL_ACTIVE_SHIFT 2 +@@ -71,12 +63,54 @@ + #define OARR_SIZE_CFG_SHIFT 1 + #define OARR_SIZE_CFG BIT(OARR_SIZE_CFG_SHIFT) + +-#define OARR_LO(window) (0xd20 + (window) * 8) +-#define OARR_HI(window) (0xd24 + (window) * 8) +-#define OMAP_LO(window) (0xd40 + (window) * 8) +-#define OMAP_HI(window) (0xd44 + (window) * 8) +- + #define MAX_NUM_OB_WINDOWS 2 ++#define MAX_NUM_PAXC_PF 4 ++ ++#define IPROC_PCIE_REG_INVALID 0xffff ++ ++enum iproc_pcie_reg { ++ IPROC_PCIE_CLK_CTRL = 0, ++ IPROC_PCIE_CFG_IND_ADDR, ++ IPROC_PCIE_CFG_IND_DATA, ++ IPROC_PCIE_CFG_ADDR, ++ IPROC_PCIE_CFG_DATA, ++ IPROC_PCIE_INTX_EN, ++ IPROC_PCIE_OARR_LO, ++ IPROC_PCIE_OARR_HI, ++ IPROC_PCIE_OMAP_LO, ++ IPROC_PCIE_OMAP_HI, ++ IPROC_PCIE_LINK_STATUS, ++}; ++ ++/* iProc PCIe PAXB registers */ ++static const u16 iproc_pcie_reg_paxb[] = { ++ [IPROC_PCIE_CLK_CTRL] = 0x000, ++ [IPROC_PCIE_CFG_IND_ADDR] = 0x120, ++ [IPROC_PCIE_CFG_IND_DATA] = 0x124, ++ [IPROC_PCIE_CFG_ADDR] = 0x1f8, ++ [IPROC_PCIE_CFG_DATA] = 0x1fc, ++ [IPROC_PCIE_INTX_EN] = 0x330, ++ [IPROC_PCIE_OARR_LO] = 0xd20, ++ [IPROC_PCIE_OARR_HI] = 0xd24, ++ [IPROC_PCIE_OMAP_LO] = 0xd40, ++ [IPROC_PCIE_OMAP_HI] = 0xd44, ++ [IPROC_PCIE_LINK_STATUS] = 0xf0c, ++}; ++ ++/* iProc PCIe PAXC v1 registers */ ++static const u16 iproc_pcie_reg_paxc[] = { ++ [IPROC_PCIE_CLK_CTRL] = 0x000, ++ [IPROC_PCIE_CFG_IND_ADDR] = 0x1f0, ++ [IPROC_PCIE_CFG_IND_DATA] = 0x1f4, ++ [IPROC_PCIE_CFG_ADDR] = 0x1f8, ++ [IPROC_PCIE_CFG_DATA] = 0x1fc, ++ [IPROC_PCIE_INTX_EN] = IPROC_PCIE_REG_INVALID, ++ [IPROC_PCIE_OARR_LO] = IPROC_PCIE_REG_INVALID, ++ [IPROC_PCIE_OARR_HI] = IPROC_PCIE_REG_INVALID, ++ [IPROC_PCIE_OMAP_LO] = IPROC_PCIE_REG_INVALID, ++ [IPROC_PCIE_OMAP_HI] = IPROC_PCIE_REG_INVALID, ++ [IPROC_PCIE_LINK_STATUS] = IPROC_PCIE_REG_INVALID, ++}; + + static inline struct iproc_pcie *iproc_data(struct pci_bus *bus) + { +@@ -91,6 +125,65 @@ static inline struct iproc_pcie *iproc_d + return pcie; + } + ++static inline bool iproc_pcie_reg_is_invalid(u16 reg_offset) ++{ ++ return !!(reg_offset == IPROC_PCIE_REG_INVALID); ++} ++ ++static inline u16 iproc_pcie_reg_offset(struct iproc_pcie *pcie, ++ enum iproc_pcie_reg reg) ++{ ++ return pcie->reg_offsets[reg]; ++} ++ ++static inline u32 iproc_pcie_read_reg(struct iproc_pcie *pcie, ++ enum iproc_pcie_reg reg) ++{ ++ u16 offset = iproc_pcie_reg_offset(pcie, reg); ++ ++ if (iproc_pcie_reg_is_invalid(offset)) ++ return 0; ++ ++ return readl(pcie->base + offset); ++} ++ ++static inline void iproc_pcie_write_reg(struct iproc_pcie *pcie, ++ enum iproc_pcie_reg reg, u32 val) ++{ ++ u16 offset = iproc_pcie_reg_offset(pcie, reg); ++ ++ if (iproc_pcie_reg_is_invalid(offset)) ++ return; ++ ++ writel(val, pcie->base + offset); ++} ++ ++static inline void iproc_pcie_ob_write(struct iproc_pcie *pcie, ++ enum iproc_pcie_reg reg, ++ unsigned window, u32 val) ++{ ++ u16 offset = iproc_pcie_reg_offset(pcie, reg); ++ ++ if (iproc_pcie_reg_is_invalid(offset)) ++ return; ++ ++ writel(val, pcie->base + offset + (window * 8)); ++} ++ ++static inline bool iproc_pcie_device_is_valid(struct iproc_pcie *pcie, ++ unsigned int slot, ++ unsigned int fn) ++{ ++ if (slot > 0) ++ return false; ++ ++ /* PAXC can only support limited number of functions */ ++ if (pcie->type == IPROC_PCIE_PAXC && fn >= MAX_NUM_PAXC_PF) ++ return false; ++ ++ return true; ++} ++ + /** + * Note access to the configuration registers are protected at the higher layer + * by 'pci_lock' in drivers/pci/access.c +@@ -104,28 +197,34 @@ static void __iomem *iproc_pcie_map_cfg_ + unsigned fn = PCI_FUNC(devfn); + unsigned busno = bus->number; + u32 val; ++ u16 offset; ++ ++ if (!iproc_pcie_device_is_valid(pcie, slot, fn)) ++ return NULL; + + /* root complex access */ + if (busno == 0) { +- if (slot >= 1) ++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_IND_ADDR, ++ where & CFG_IND_ADDR_MASK); ++ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_IND_DATA); ++ if (iproc_pcie_reg_is_invalid(offset)) + return NULL; +- writel(where & CFG_IND_ADDR_MASK, +- pcie->base + CFG_IND_ADDR_OFFSET); +- return (pcie->base + CFG_IND_DATA_OFFSET); ++ else ++ return (pcie->base + offset); + } + +- if (fn > 1) +- return NULL; +- + /* EP device access */ + val = (busno << CFG_ADDR_BUS_NUM_SHIFT) | + (slot << CFG_ADDR_DEV_NUM_SHIFT) | + (fn << CFG_ADDR_FUNC_NUM_SHIFT) | + (where & CFG_ADDR_REG_NUM_MASK) | + (1 & CFG_ADDR_CFG_TYPE_MASK); +- writel(val, pcie->base + CFG_ADDR_OFFSET); +- +- return (pcie->base + CFG_DATA_OFFSET); ++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CFG_ADDR, val); ++ offset = iproc_pcie_reg_offset(pcie, IPROC_PCIE_CFG_DATA); ++ if (iproc_pcie_reg_is_invalid(offset)) ++ return NULL; ++ else ++ return (pcie->base + offset); + } + + static struct pci_ops iproc_pcie_ops = { +@@ -138,18 +237,29 @@ static void iproc_pcie_reset(struct ipro + { + u32 val; + ++ if (pcie->type == IPROC_PCIE_PAXC) { ++ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_CLK_CTRL); ++ val &= ~PAXC_RESET_MASK; ++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val); ++ udelay(100); ++ val |= PAXC_RESET_MASK; ++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val); ++ udelay(100); ++ return; ++ } ++ + /* + * Select perst_b signal as reset source. Put the device into reset, + * and then bring it out of reset + */ +- val = readl(pcie->base + CLK_CONTROL_OFFSET); ++ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_CLK_CTRL); + val &= ~EP_PERST_SOURCE_SELECT & ~EP_MODE_SURVIVE_PERST & + ~RC_PCIE_RST_OUTPUT; +- writel(val, pcie->base + CLK_CONTROL_OFFSET); ++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val); + udelay(250); + + val |= RC_PCIE_RST_OUTPUT; +- writel(val, pcie->base + CLK_CONTROL_OFFSET); ++ iproc_pcie_write_reg(pcie, IPROC_PCIE_CLK_CTRL, val); + msleep(100); + } + +@@ -160,7 +270,14 @@ static int iproc_pcie_check_link(struct + u16 pos, link_status; + bool link_is_active = false; + +- val = readl(pcie->base + PCIE_LINK_STATUS_OFFSET); ++ /* ++ * PAXC connects to emulated endpoint devices directly and does not ++ * have a Serdes. Therefore skip the link detection logic here ++ */ ++ if (pcie->type == IPROC_PCIE_PAXC) ++ return 0; ++ ++ val = iproc_pcie_read_reg(pcie, IPROC_PCIE_LINK_STATUS); + if (!(val & PCIE_PHYLINKUP) || !(val & PCIE_DL_ACTIVE)) { + dev_err(pcie->dev, "PHY or data link is INACTIVE!\n"); + return -ENODEV; +@@ -221,7 +338,7 @@ static int iproc_pcie_check_link(struct + + static void iproc_pcie_enable(struct iproc_pcie *pcie) + { +- writel(SYS_RC_INTX_MASK, pcie->base + SYS_RC_INTX_EN); ++ iproc_pcie_write_reg(pcie, IPROC_PCIE_INTX_EN, SYS_RC_INTX_MASK); + } + + /** +@@ -272,11 +389,15 @@ static int iproc_pcie_setup_ob(struct ip + axi_addr -= ob->axi_offset; + + for (i = 0; i < MAX_NUM_OB_WINDOWS; i++) { +- writel(lower_32_bits(axi_addr) | OARR_VALID | +- (ob->set_oarr_size ? 1 : 0), pcie->base + OARR_LO(i)); +- writel(upper_32_bits(axi_addr), pcie->base + OARR_HI(i)); +- writel(lower_32_bits(pci_addr), pcie->base + OMAP_LO(i)); +- writel(upper_32_bits(pci_addr), pcie->base + OMAP_HI(i)); ++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OARR_LO, i, ++ lower_32_bits(axi_addr) | OARR_VALID | ++ (ob->set_oarr_size ? 1 : 0)); ++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OARR_HI, i, ++ upper_32_bits(axi_addr)); ++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OMAP_LO, i, ++ lower_32_bits(pci_addr)); ++ iproc_pcie_ob_write(pcie, IPROC_PCIE_OMAP_HI, i, ++ upper_32_bits(pci_addr)); + + size -= ob->window_size; + if (size == 0) +@@ -340,6 +461,19 @@ int iproc_pcie_setup(struct iproc_pcie * + goto err_exit_phy; + } + ++ switch (pcie->type) { ++ case IPROC_PCIE_PAXB: ++ pcie->reg_offsets = iproc_pcie_reg_paxb; ++ break; ++ case IPROC_PCIE_PAXC: ++ pcie->reg_offsets = iproc_pcie_reg_paxc; ++ break; ++ default: ++ dev_err(pcie->dev, "incompatible iProc PCIe interface\n"); ++ ret = -EINVAL; ++ goto err_power_off_phy; ++ } ++ + iproc_pcie_reset(pcie); + + if (pcie->need_ob_cfg) { +--- a/drivers/pci/host/pcie-iproc.h ++++ b/drivers/pci/host/pcie-iproc.h +@@ -15,6 +15,20 @@ + #define _PCIE_IPROC_H + + /** ++ * iProc PCIe interface type ++ * ++ * PAXB is the wrapper used in root complex that can be connected to an ++ * external endpoint device ++ * ++ * PAXC is the wrapper used in root complex dedicated for internal emulated ++ * endpoint devices ++ */ ++enum iproc_pcie_type { ++ IPROC_PCIE_PAXB = 0, ++ IPROC_PCIE_PAXC, ++}; ++ ++/** + * iProc PCIe outbound mapping + * @set_oarr_size: indicates the OARR size bit needs to be set + * @axi_offset: offset from the AXI address to the internal address used by +@@ -29,7 +43,10 @@ struct iproc_pcie_ob { + + /** + * iProc PCIe device ++ * + * @dev: pointer to device data structure ++ * @type: iProc PCIe interface type ++ * @reg_offsets: register offsets + * @base: PCIe host controller I/O register base + * @sysdata: Per PCI controller data (ARM-specific) + * @root_bus: pointer to root bus +@@ -41,6 +58,8 @@ struct iproc_pcie_ob { + */ + struct iproc_pcie { + struct device *dev; ++ enum iproc_pcie_type type; ++ const u16 *reg_offsets; + void __iomem *base; + #ifdef CONFIG_ARM + struct pci_sys_data sysdata; |