Add DM support and support for probing the iMX PCI driver from DT. The legacy non-DM support is retained, however shall be removed once DM PCI is the only option remaining.
Signed-off-by: Marek Vasut marex@denx.de Cc: Bin Meng bmeng.cn@gmail.com Cc: Fabio Estevam fabio.estevam@nxp.com Cc: Stefano Babic sbabic@denx.de --- drivers/pci/pcie_imx.c | 111 ++++++++++++++++++++++++++++++++++++++--- 1 file changed, 105 insertions(+), 6 deletions(-)
diff --git a/drivers/pci/pcie_imx.c b/drivers/pci/pcie_imx.c index bcee3745f4..e6a396023b 100644 --- a/drivers/pci/pcie_imx.c +++ b/drivers/pci/pcie_imx.c @@ -16,6 +16,7 @@ #include <asm/arch/crm_regs.h> #include <asm/gpio.h> #include <asm/io.h> +#include <dm.h> #include <linux/sizes.h> #include <errno.h> #include <asm/arch/sys_proto.h> @@ -383,10 +384,9 @@ static void imx_pcie_fix_dabt_handler(bool set) } }
-static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d, - int where, u32 *val) +static int imx_pcie_read_cfg(struct imx_pcie_priv *priv, pci_dev_t d, + int where, u32 *val) { - struct imx_pcie_priv *priv = hose->priv_data; void __iomem *va_address; int ret;
@@ -413,10 +413,9 @@ static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d, return 0; }
-static int imx_pcie_write_config(struct pci_controller *hose, pci_dev_t d, - int where, u32 val) +static int imx_pcie_write_cfg(struct imx_pcie_priv *priv, pci_dev_t d, + int where, u32 val) { - struct imx_pcie_priv *priv = hose->priv_data; void __iomem *va_address = NULL; int ret;
@@ -668,6 +667,7 @@ static int imx_pcie_link_up(struct imx_pcie_priv *priv) return 0; }
+#if !CONFIG_IS_ENABLED(DM_PCI) static struct imx_pcie_priv imx_pcie_priv = { .dbi_base = (void __iomem *)MX6_DBI_ADDR, .cfg_base = (void __iomem *)MX6_ROOT_ADDR, @@ -675,6 +675,22 @@ static struct imx_pcie_priv imx_pcie_priv = {
static struct imx_pcie_priv *priv = &imx_pcie_priv;
+static int imx_pcie_read_config(struct pci_controller *hose, pci_dev_t d, + int where, u32 *val) +{ + struct imx_pcie_priv *priv = hose->priv_data; + + return imx_pcie_read_cfg(priv, d, where, val); +} + +static int imx_pcie_write_config(struct pci_controller *hose, pci_dev_t d, + int where, u32 *val) +{ + struct imx_pcie_priv *priv = hose->priv_data; + + return imx_pcie_write_cfg(priv, d, where, val); +} + void imx_pcie_init(void) { /* Static instance of the controller. */ @@ -730,3 +746,86 @@ void pci_init_board(void) { imx_pcie_init(); } +#else +static int imx_pcie_dm_read_config(struct udevice *dev, pci_dev_t bdf, + uint offset, ulong *value, + enum pci_size_t size) +{ + struct imx_pcie_priv *priv = dev_get_priv(dev); + u32 tmpval; + int ret; + + ret = imx_pcie_read_cfg(priv, bdf, offset, &tmpval); + if (ret) + return ret; + + *value = pci_conv_32_to_size(tmpval, offset, size); + return 0; +} + +static int imx_pcie_dm_write_config(struct udevice *dev, pci_dev_t bdf, + uint offset, ulong value, + enum pci_size_t size) +{ + struct imx_pcie_priv *priv = dev_get_priv(dev); + u32 tmpval, newval; + int ret; + + ret = imx_pcie_read_cfg(priv, bdf, offset, &tmpval); + if (ret) + return ret; + + newval = pci_conv_size_to_32(tmpval, value, offset, size); + return imx_pcie_write_cfg(priv, bdf, offset, newval); +} + +static int imx_pcie_dm_probe(struct udevice *dev) +{ + struct imx_pcie_priv *priv = dev_get_priv(dev); + + return imx_pcie_link_up(priv); +} + +static int imx_pcie_dm_remove(struct udevice *dev) +{ + struct imx_pcie_priv *priv = dev_get_priv(dev); + + imx6_pcie_assert_core_reset(priv, true); + + return 0; +} + +static int imx_pcie_ofdata_to_platdata(struct udevice *dev) +{ + struct imx_pcie_priv *priv = dev_get_priv(dev); + + priv->dbi_base = (void __iomem *)devfdt_get_addr_index(dev, 0); + priv->cfg_base = (void __iomem *)devfdt_get_addr_index(dev, 1); + if (!priv->dbi_base || !priv->cfg_base) + return -EINVAL; + + return 0; +} + +static const struct dm_pci_ops imx_pcie_ops = { + .read_config = imx_pcie_dm_read_config, + .write_config = imx_pcie_dm_write_config, +}; + +static const struct udevice_id imx_pcie_ids[] = { + { .compatible = "fsl,imx6q-pcie" }, + { } +}; + +U_BOOT_DRIVER(imx_pcie) = { + .name = "imx_pcie", + .id = UCLASS_PCI, + .of_match = imx_pcie_ids, + .ops = &imx_pcie_ops, + .probe = imx_pcie_dm_probe, + .remove = imx_pcie_dm_remove, + .ofdata_to_platdata = imx_pcie_ofdata_to_platdata, + .priv_auto_alloc_size = sizeof(struct imx_pcie_priv), + .flags = DM_FLAG_OS_PREPARE, +}; +#endif