diff options
7 files changed, 235 insertions, 24 deletions
diff --git a/target/linux/imx6/patches-3.10/0030-PCI-imx6-remove-outbound-io-mem-ATU-region-mapping.patch b/target/linux/imx6/patches-3.10/0030-PCI-imx6-remove-outbound-io-mem-ATU-region-mapping.patch new file mode 100644 index 0000000000..bc9ad3c7a7 --- /dev/null +++ b/target/linux/imx6/patches-3.10/0030-PCI-imx6-remove-outbound-io-mem-ATU-region-mapping.patch @@ -0,0 +1,106 @@ +From 93d2b52fe73294d59bbce3a6d4da031647b1f3b2 Mon Sep 17 00:00:00 2001 +From: Tim Harvey <tharvey@gateworks.com> +Date: Tue, 22 Oct 2013 15:56:40 -0700 +Subject: [PATCH] PCI: imx6: remove outbound io/mem ATU region mapping + +The IMX6 iATU is used for address translation between the AXI bus +address space and PCI address space. This is used for type0 and type1 +config cycles but is not necessary for outbound io/mem regions. + +This patch removes the calls that inappropriately re-configures the ATU +viewport for outbound memory and IO after config cycles and removes them +altogether as they are not necessary. + +This resolves issues with PCI devices behind switches and has been tested with +a Gige device behind a PLX PEX860x switch. + +Signed-off-by: Tim Harvey <tharvey@gateworks.com> +--- + drivers/pci/host/pcie-designware.c | 41 +++--------------------------------- + 1 file changed, 3 insertions(+), 38 deletions(-) + +--- a/drivers/pci/host/pcie-designware.c ++++ b/drivers/pci/host/pcie-designware.c +@@ -43,7 +43,6 @@ + #define PCIE_ATU_VIEWPORT 0x900 + #define PCIE_ATU_REGION_INBOUND (0x1 << 31) + #define PCIE_ATU_REGION_OUTBOUND (0x0 << 31) +-#define PCIE_ATU_REGION_INDEX1 (0x1 << 0) + #define PCIE_ATU_REGION_INDEX0 (0x0 << 0) + #define PCIE_ATU_CR1 0x904 + #define PCIE_ATU_TYPE_MEM (0x0 << 0) +@@ -264,8 +263,8 @@ static void dw_pcie_prog_viewport_cfg0(s + + static void dw_pcie_prog_viewport_cfg1(struct pcie_port *pp, u32 busdev) + { +- /* Program viewport 1 : OUTBOUND : CFG1 */ +- dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1, ++ /* Program viewport 0 : OUTBOUND : CFG1 */ ++ dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0, + PCIE_ATU_VIEWPORT); + dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG1, PCIE_ATU_CR1); + dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2); +@@ -275,38 +274,8 @@ static void dw_pcie_prog_viewport_cfg1(s + PCIE_ATU_LIMIT); + dw_pcie_writel_rc(pp, busdev, PCIE_ATU_LOWER_TARGET); + dw_pcie_writel_rc(pp, 0, PCIE_ATU_UPPER_TARGET); +-} +- +-static void dw_pcie_prog_viewport_mem_outbound(struct pcie_port *pp) +-{ +- /* Program viewport 0 : OUTBOUND : MEM */ +- dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX0, +- PCIE_ATU_VIEWPORT); +- dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_MEM, PCIE_ATU_CR1); +- dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2); +- dw_pcie_writel_rc(pp, pp->mem_base, PCIE_ATU_LOWER_BASE); +- dw_pcie_writel_rc(pp, (pp->mem_base >> 32), PCIE_ATU_UPPER_BASE); +- dw_pcie_writel_rc(pp, pp->mem_base + pp->config.mem_size - 1, +- PCIE_ATU_LIMIT); +- dw_pcie_writel_rc(pp, pp->config.mem_bus_addr, PCIE_ATU_LOWER_TARGET); +- dw_pcie_writel_rc(pp, upper_32_bits(pp->config.mem_bus_addr), +- PCIE_ATU_UPPER_TARGET); +-} +- +-static void dw_pcie_prog_viewport_io_outbound(struct pcie_port *pp) +-{ +- /* Program viewport 1 : OUTBOUND : IO */ +- dw_pcie_writel_rc(pp, PCIE_ATU_REGION_OUTBOUND | PCIE_ATU_REGION_INDEX1, +- PCIE_ATU_VIEWPORT); +- dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_IO, PCIE_ATU_CR1); ++ dw_pcie_writel_rc(pp, PCIE_ATU_TYPE_CFG1, PCIE_ATU_CR1); + dw_pcie_writel_rc(pp, PCIE_ATU_ENABLE, PCIE_ATU_CR2); +- dw_pcie_writel_rc(pp, pp->io_base, PCIE_ATU_LOWER_BASE); +- dw_pcie_writel_rc(pp, (pp->io_base >> 32), PCIE_ATU_UPPER_BASE); +- dw_pcie_writel_rc(pp, pp->io_base + pp->config.io_size - 1, +- PCIE_ATU_LIMIT); +- dw_pcie_writel_rc(pp, pp->config.io_bus_addr, PCIE_ATU_LOWER_TARGET); +- dw_pcie_writel_rc(pp, upper_32_bits(pp->config.io_bus_addr), +- PCIE_ATU_UPPER_TARGET); + } + + static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus, +@@ -322,11 +291,9 @@ static int dw_pcie_rd_other_conf(struct + if (bus->parent->number == pp->root_bus_nr) { + dw_pcie_prog_viewport_cfg0(pp, busdev); + ret = cfg_read(pp->va_cfg0_base + address, where, size, val); +- dw_pcie_prog_viewport_mem_outbound(pp); + } else { + dw_pcie_prog_viewport_cfg1(pp, busdev); + ret = cfg_read(pp->va_cfg1_base + address, where, size, val); +- dw_pcie_prog_viewport_io_outbound(pp); + } + + return ret; +@@ -345,11 +312,9 @@ static int dw_pcie_wr_other_conf(struct + if (bus->parent->number == pp->root_bus_nr) { + dw_pcie_prog_viewport_cfg0(pp, busdev); + ret = cfg_write(pp->va_cfg0_base + address, where, size, val); +- dw_pcie_prog_viewport_mem_outbound(pp); + } else { + dw_pcie_prog_viewport_cfg1(pp, busdev); + ret = cfg_write(pp->va_cfg1_base + address, where, size, val); +- dw_pcie_prog_viewport_io_outbound(pp); + } + + return ret; diff --git a/target/linux/imx6/patches-3.10/0031-PCI-imx6-init-must-be-early.patch b/target/linux/imx6/patches-3.10/0031-PCI-imx6-init-must-be-early.patch new file mode 100644 index 0000000000..0546d9c8fa --- /dev/null +++ b/target/linux/imx6/patches-3.10/0031-PCI-imx6-init-must-be-early.patch @@ -0,0 +1,24 @@ +From 8c8c877d8490c9d51210ee9e90d5f4d740f115c9 Mon Sep 17 00:00:00 2001 +From: Tim Harvey <tharvey@gateworks.com> +Date: Thu, 17 Oct 2013 15:55:47 -0700 +Subject: [PATCH 3/5] PCI: imx6: init must be early + +If driver init is not early the pcie port driver gets initalized +first and interrupts are not configured for the imx6 pcie driver. + +Signed-off-by: Tim Harvey <tharvey@gateworks.com> +--- + drivers/pci/host/pci-imx6.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/pci/host/pci-imx6.c ++++ b/drivers/pci/host/pci-imx6.c +@@ -568,7 +568,7 @@ static int __init imx6_pcie_init(void) + { + return platform_driver_probe(&imx6_pcie_driver, imx6_pcie_probe); + } +-module_init(imx6_pcie_init); ++fs_initcall(imx6_pcie_init); + + MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>"); + MODULE_DESCRIPTION("Freescale i.MX6 PCIe host controller driver"); diff --git a/target/linux/imx6/patches-3.10/0032-PCI-imx6-fix-imprecise-abort-handler.patch b/target/linux/imx6/patches-3.10/0032-PCI-imx6-fix-imprecise-abort-handler.patch new file mode 100644 index 0000000000..5cef4114f4 --- /dev/null +++ b/target/linux/imx6/patches-3.10/0032-PCI-imx6-fix-imprecise-abort-handler.patch @@ -0,0 +1,36 @@ +From 8590081d5328fe59d4f72aaadafb47fb91d8dc7c Mon Sep 17 00:00:00 2001 +From: Tim Harvey <tharvey@gateworks.com> +Date: Thu, 17 Oct 2013 15:52:16 -0700 +Subject: [PATCH] PCI: imx6: fix imprecise abort handler + +An imprecise abort is triggered when a port behind a switch is accessed +and no device is present. At enumeration, imprecise aborts are not enabled +thus this ends up getting deferred until the kernel has completed init. At +that point we must not adjust PC - the handler must do nothing, but a handler +must exist. + +This fixes random crashes that occur right after freeing init. +This is against linux-pci/host-imx6. + +Acked-by: Marek Vasut <marex@denx.de> +Tested-by: Marek Vasut <marex@denx.de> +Signed-off-by: Tim Harvey <tharvey@gateworks.com> +--- + drivers/pci/host/pci-imx6.c | 6 ------ + 1 file changed, 6 deletions(-) + +--- a/drivers/pci/host/pci-imx6.c ++++ b/drivers/pci/host/pci-imx6.c +@@ -200,12 +200,6 @@ static int pcie_phy_write(void __iomem * + static int imx6q_pcie_abort_handler(unsigned long addr, + unsigned int fsr, struct pt_regs *regs) + { +- /* +- * If it was an imprecise abort, then we need to correct the +- * return address to be _after_ the instruction. +- */ +- if (fsr & (1 << 10)) +- regs->ARM_pc += 4; + return 0; + } + diff --git a/target/linux/imx6/patches-3.10/0033-PCI-imx6-increase-link-startup.patch b/target/linux/imx6/patches-3.10/0033-PCI-imx6-increase-link-startup.patch new file mode 100644 index 0000000000..a94a166908 --- /dev/null +++ b/target/linux/imx6/patches-3.10/0033-PCI-imx6-increase-link-startup.patch @@ -0,0 +1,24 @@ +From 11e8d0ed8cc3b415767961555efc2885791a9391 Mon Sep 17 00:00:00 2001 +From: Tim Harvey <tharvey@gateworks.com> +Date: Thu, 17 Oct 2013 15:57:28 -0700 +Subject: [PATCH 4/5] PCI: imx6: increase link startup + +An increase link startup delay is required when certain PCI switches are +attached to the root complex. + +Signed-off-by: Tim Harvey <tharvey@gateworks.com> +--- + drivers/pci/host/pci-imx6.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/drivers/pci/host/pci-imx6.c ++++ b/drivers/pci/host/pci-imx6.c +@@ -318,7 +318,7 @@ static void imx6_pcie_host_init(struct p + while (!dw_pcie_link_up(pp)) { + usleep_range(100, 1000); + count++; +- if (count >= 10) { ++ if (count >= 200) { + dev_err(pp->dev, "phy link never came up\n"); + dev_dbg(pp->dev, + "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n", diff --git a/target/linux/imx6/patches-3.10/0034-PCI-imx6-swizzle-interrupts.patch b/target/linux/imx6/patches-3.10/0034-PCI-imx6-swizzle-interrupts.patch new file mode 100644 index 0000000000..425ba8a41e --- /dev/null +++ b/target/linux/imx6/patches-3.10/0034-PCI-imx6-swizzle-interrupts.patch @@ -0,0 +1,28 @@ +From 73a0e49b562da9b06e487fb8e051075543495be5 Mon Sep 17 00:00:00 2001 +From: Tim Harvey <tharvey@gateworks.com> +Date: Thu, 17 Oct 2013 15:50:48 -0700 +Subject: [PATCH 1/5] PCI: imx6: swizzle interrupts + + +Signed-off-by: Tim Harvey <tharvey@gateworks.com> +--- + drivers/pci/host/pcie-designware.c | 8 +++++++- + 1 file changed, 7 insertions(+), 1 deletion(-) + +--- a/drivers/pci/host/pcie-designware.c ++++ b/drivers/pci/host/pcie-designware.c +@@ -676,7 +676,13 @@ int dw_pcie_map_irq(const struct pci_dev + { + struct pcie_port *pp = sys_to_pcie(dev->bus->sysdata); + +- return pp->irq; ++ switch (pin) { ++ case 1: return pp->irq; ++ case 2: return pp->irq - 1; ++ case 3: return pp->irq - 2; ++ case 4: return pp->irq - 3; ++ default: return -1; ++ } + } + + static void dw_pcie_add_bus(struct pci_bus *bus) diff --git a/target/linux/imx6/patches-3.10/010-pcie-backport-fixes.patch b/target/linux/imx6/patches-3.10/010-pcie-backport-fixes.patch index 2aea7084c7..cb26ec83d4 100644 --- a/target/linux/imx6/patches-3.10/010-pcie-backport-fixes.patch +++ b/target/linux/imx6/patches-3.10/010-pcie-backport-fixes.patch @@ -26,3 +26,20 @@ + +# PCI host controller drivers +obj-y += host/ +--- a/Documentation/devicetree/bindings/clock/imx6q-clock.txt ++++ b/Documentation/devicetree/bindings/clock/imx6q-clock.txt +@@ -208,10 +208,10 @@ clocks and IDs. + pll4_post_div 193 + pll5_post_div 194 + pll5_video_div 195 +- lvds1_sel 204 +- lvds2_sel 205 +- lvds1_gate 206 +- lvds2_gate 207 ++ lvds1_sel 196 ++ lvds2_sel 197 ++ lvds1_gate 198 ++ lvds2_gate 199 + + Examples: + diff --git a/target/linux/imx6/patches-3.10/011-pci-tweaks.patch b/target/linux/imx6/patches-3.10/011-pci-tweaks.patch deleted file mode 100644 index eda007eb6d..0000000000 --- a/target/linux/imx6/patches-3.10/011-pci-tweaks.patch +++ /dev/null @@ -1,24 +0,0 @@ ---- a/drivers/pci/host/pci-imx6.c -+++ b/drivers/pci/host/pci-imx6.c -@@ -200,12 +200,6 @@ static int pcie_phy_write(void __iomem * - static int imx6q_pcie_abort_handler(unsigned long addr, - unsigned int fsr, struct pt_regs *regs) - { -- /* -- * If it was an imprecise abort, then we need to correct the -- * return address to be _after_ the instruction. -- */ -- if (fsr & (1 << 10)) -- regs->ARM_pc += 4; - return 0; - } - -@@ -322,7 +316,7 @@ static void imx6_pcie_host_init(struct p - IMX6Q_GPR12_PCIE_CTL_2, 1 << 10); - - while (!dw_pcie_link_up(pp)) { -- usleep_range(100, 1000); -+ usleep_range(2000, 3000); - count++; - if (count >= 10) { - dev_err(pp->dev, "phy link never came up\n"); |