From 33c215af4b9de32e5052bb716411dc34ce9b63ac Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Sun, 15 Sep 2019 12:08:58 -0600 Subject: dm: pci: Add a function to read a PCI BAR At present PCI address transaction is not supported so drivers must manually read the correct BAR after reading the device tree info. The ns16550 has a suitable implementation, so move this code into the core DM support. Note that there is no live-tree equivalent at present. Signed-off-by: Simon Glass Reviewed-by: Bin Meng Tested-by: Bin Meng [bmeng: correct the unclear comments in test.dts] Signed-off-by: Bin Meng --- include/dm/fdtaddr.h | 8 ++++++++ include/dm/read.h | 25 +++++++++++++++++++++++++ 2 files changed, 33 insertions(+) (limited to 'include') diff --git a/include/dm/fdtaddr.h b/include/dm/fdtaddr.h index 57b326cb336..959d3bc2d69 100644 --- a/include/dm/fdtaddr.h +++ b/include/dm/fdtaddr.h @@ -138,4 +138,12 @@ fdt_addr_t devfdt_get_addr_name(struct udevice *dev, const char *name); fdt_addr_t devfdt_get_addr_size_name(struct udevice *dev, const char *name, fdt_size_t *size); +/** + * devfdt_get_addr_pci() - Read an address and handle PCI address translation + * + * @dev: Device to read from + * @return address or FDT_ADDR_T_NONE if not found + */ +fdt_addr_t devfdt_get_addr_pci(struct udevice *dev); + #endif diff --git a/include/dm/read.h b/include/dm/read.h index 803daf7620c..d37fcb504d3 100644 --- a/include/dm/read.h +++ b/include/dm/read.h @@ -248,6 +248,26 @@ fdt_addr_t dev_read_addr(struct udevice *dev); */ void *dev_read_addr_ptr(struct udevice *dev); +/** + * dev_read_addr_pci() - Read an address and handle PCI address translation + * + * At present U-Boot does not have address translation logic for PCI in the + * livetree implementation (of_addr.c). This special function supports this for + * the flat tree implementation. + * + * This function should be removed (and code should use dev_read() instead) + * once: + * + * 1. PCI address translation is added; and either + * 2. everything uses livetree where PCI translation is used (which is feasible + * in SPL and U-Boot proper) or PCI address translation is added to + * fdtdec_get_addr() and friends. + * + * @dev: Device to read from + * @return address or FDT_ADDR_T_NONE if not found + */ +fdt_addr_t dev_read_addr_pci(struct udevice *dev); + /** * dev_remap_addr() - Get the reg property of a device as a * memory-mapped I/O pointer @@ -691,6 +711,11 @@ static inline void *dev_read_addr_ptr(struct udevice *dev) return devfdt_get_addr_ptr(dev); } +static inline fdt_addr_t dev_read_addr_pci(struct udevice *dev) +{ + return devfdt_get_addr_pci(dev); +} + static inline void *dev_remap_addr(struct udevice *dev) { return devfdt_remap_addr(dev); -- cgit v1.3.1