diff options
| -rw-r--r-- | drivers/pci/controller/pcie-brcmstb.c | 69 |
1 files changed, 67 insertions, 2 deletions
diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c index 9c45272ffcf0..d171ee61eab3 100644 --- a/drivers/pci/controller/pcie-brcmstb.c +++ b/drivers/pci/controller/pcie-brcmstb.c @@ -55,6 +55,10 @@ #define PCIE_RC_DL_MDIO_WR_DATA 0x1104 #define PCIE_RC_DL_MDIO_RD_DATA 0x1108 +#define PCIE_RC_PL_PHY_CTL_15 0x184c +#define PCIE_RC_PL_PHY_CTL_15_DIS_PLL_PD_MASK 0x400000 +#define PCIE_RC_PL_PHY_CTL_15_PM_CLK_PERIOD_MASK 0xff + #define PCIE_MISC_MISC_CTRL 0x4008 #define PCIE_MISC_MISC_CTRL_PCIE_RCB_64B_MODE_MASK 0x80 #define PCIE_MISC_MISC_CTRL_PCIE_RCB_MPS_MODE_MASK 0x400 @@ -234,13 +238,24 @@ struct inbound_win { u64 cpu_addr; }; +/* + * The RESCAL block is tied to PCIe controller #1, regardless of the number of + * controllers, and turning off PCIe controller #1 prevents access to the RESCAL + * register blocks, therefore no other controller can access this register + * space, and depending upon the bus fabric we may get a timeout (UBUS/GISB), + * or a hang (AXI). + */ +#define CFG_QUIRK_AVOID_BRIDGE_SHUTDOWN BIT(0) + struct pcie_cfg_data { const int *offsets; const enum pcie_soc_base soc_base; const bool has_phy; + const u32 quirks; u8 num_inbound_wins; int (*perst_set)(struct brcm_pcie *pcie, u32 val); int (*bridge_sw_init_set)(struct brcm_pcie *pcie, u32 val); + int (*post_setup)(struct brcm_pcie *pcie); }; struct subdev_regulators { @@ -816,6 +831,38 @@ static int brcm_pcie_perst_set_generic(struct brcm_pcie *pcie, u32 val) return 0; } +static int brcm_pcie_post_setup_bcm2712(struct brcm_pcie *pcie) +{ + const u16 data[] = { 0x50b9, 0xbda1, 0x0094, 0x97b4, 0x5030, 0x5030, 0x0007 }; + const u8 regs[] = { 0x16, 0x17, 0x18, 0x19, 0x1b, 0x1c, 0x1e }; + int ret, i; + u32 tmp; + + /* Allow a 54MHz (xosc) refclk source */ + ret = brcm_pcie_mdio_write(pcie->base, MDIO_PORT0, SET_ADDR_OFFSET, 0x1600); + if (ret < 0) + return ret; + + for (i = 0; i < ARRAY_SIZE(regs); i++) { + ret = brcm_pcie_mdio_write(pcie->base, MDIO_PORT0, regs[i], data[i]); + if (ret < 0) + return ret; + } + + usleep_range(100, 200); + + /* + * Set L1SS sub-state timers to avoid lengthy state transitions, + * PM clock period is 18.52ns (1/54MHz, round down). + */ + tmp = readl(pcie->base + PCIE_RC_PL_PHY_CTL_15); + tmp &= ~PCIE_RC_PL_PHY_CTL_15_PM_CLK_PERIOD_MASK; + tmp |= 0x12; + writel(tmp, pcie->base + PCIE_RC_PL_PHY_CTL_15); + + return 0; +} + static void add_inbound_win(struct inbound_win *b, u8 *count, u64 size, u64 cpu_addr, u64 pci_offset) { @@ -1179,6 +1226,12 @@ static int brcm_pcie_setup(struct brcm_pcie *pcie) PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1_ENDIAN_MODE_BAR2_MASK); writel(tmp, base + PCIE_RC_CFG_VENDOR_VENDOR_SPECIFIC_REG1); + if (pcie->cfg->post_setup) { + ret = pcie->cfg->post_setup(pcie); + if (ret < 0) + return ret; + } + return 0; } @@ -1488,8 +1541,9 @@ static int brcm_pcie_turn_off(struct brcm_pcie *pcie) u32p_replace_bits(&tmp, 1, PCIE_MISC_HARD_PCIE_HARD_DEBUG_SERDES_IDDQ_MASK); writel(tmp, base + HARD_DEBUG(pcie)); - /* Shutdown PCIe bridge */ - ret = pcie->cfg->bridge_sw_init_set(pcie, 1); + if (!(pcie->cfg->quirks & CFG_QUIRK_AVOID_BRIDGE_SHUTDOWN)) + /* Shutdown PCIe bridge */ + ret = pcie->cfg->bridge_sw_init_set(pcie, 1); return ret; } @@ -1699,6 +1753,16 @@ static const struct pcie_cfg_data bcm2711_cfg = { .num_inbound_wins = 3, }; +static const struct pcie_cfg_data bcm2712_cfg = { + .offsets = pcie_offsets_bcm7712, + .soc_base = BCM7712, + .perst_set = brcm_pcie_perst_set_7278, + .bridge_sw_init_set = brcm_pcie_bridge_sw_init_set_generic, + .post_setup = brcm_pcie_post_setup_bcm2712, + .quirks = CFG_QUIRK_AVOID_BRIDGE_SHUTDOWN, + .num_inbound_wins = 10, +}; + static const struct pcie_cfg_data bcm4908_cfg = { .offsets = pcie_offsets, .soc_base = BCM4908, @@ -1750,6 +1814,7 @@ static const struct pcie_cfg_data bcm7712_cfg = { static const struct of_device_id brcm_pcie_match[] = { { .compatible = "brcm,bcm2711-pcie", .data = &bcm2711_cfg }, + { .compatible = "brcm,bcm2712-pcie", .data = &bcm2712_cfg }, { .compatible = "brcm,bcm4908-pcie", .data = &bcm4908_cfg }, { .compatible = "brcm,bcm7211-pcie", .data = &generic_cfg }, { .compatible = "brcm,bcm7216-pcie", .data = &bcm7216_cfg }, |