From f031ad404e544c9332498a11d9956b27a4acc72b Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Tue, 9 Jul 2024 01:36:59 -0400 Subject: kernel: Add PCI driver Signed-off-by: Ian Moffett --- sys/include/dev/pci/pci.h | 57 ++++++++++++++++++++++++++++++++++++ sys/include/dev/pci/pciregs.h | 67 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 124 insertions(+) create mode 100644 sys/include/dev/pci/pci.h create mode 100644 sys/include/dev/pci/pciregs.h (limited to 'sys/include') diff --git a/sys/include/dev/pci/pci.h b/sys/include/dev/pci/pci.h new file mode 100644 index 0000000..4e2ceec --- /dev/null +++ b/sys/include/dev/pci/pci.h @@ -0,0 +1,57 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _PCI_H_ +#define _PCI_H_ + +#include +#include + +typedef uint32_t pcireg_t; + +struct pci_device { + uint8_t bus; + uint8_t slot; + uint8_t func; + + uint16_t device_id; + uint16_t vendor_id; + uint8_t pci_class; + uint8_t pci_subclass; + uint8_t prog_if; + uintptr_t bar[6]; + uint8_t irq_line; + TAILQ_ENTRY(pci_device) link; +}; + +pcireg_t pci_readl(struct pci_device *dev, uint32_t offset); +void pci_writel(struct pci_device *dev, uint32_t offset, pcireg_t val); +int pci_init(void); + +#endif /* !_PCI_H_ */ diff --git a/sys/include/dev/pci/pciregs.h b/sys/include/dev/pci/pciregs.h new file mode 100644 index 0000000..c1b02e9 --- /dev/null +++ b/sys/include/dev/pci/pciregs.h @@ -0,0 +1,67 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _PCI_PCIREGS_H_ +#define _PCI_PCIREGS_H_ + +#include + +#define PCIREG_VENDOR_ID 0x00 /* 16 bits */ +#define PCIREG_DEVICE_ID 0x02 /* 16 bits */ +#define PCIREG_CLASSREV 0x08 /* 32 bits */ +#define PCIREG_BAR0 0x10 /* 32 bits */ +#define PCIREG_BAR1 0x14 /* 32 bits */ +#define PCIREG_BAR2 0x18 /* 32 bits */ +#define PCIREG_BAR3 0x1C /* 32 bits */ +#define PCIREG_BAR4 0x20 /* 32 bits */ +#define PCIREG_BAR5 0x24 /* 32 bits */ +#define PCIREG_IRQLINE 0x3C /* 8 bits */ +#define PCIREG_CMDSTATUS 0x04 /* command (15:0), status (31:16) */ + +/* Macros to extract PCIREG_CLASSREV bits */ +#define PCIREG_CLASS(CLASSREV) (CLASSREV >> 24) +#define PCIREG_SUBCLASS(CLASSREV) ((CLASSREV >> 16) & 0xFF) +#define PCIREG_REVID(CLASSREV) (CLASSREV & 0xFF) +#define PCIREG_PROGIF(CLASSREV) ((CLASSREV >> 8) & 0xFF) + +/* Macros to extract PCIREG_CMDSTATUS bits */ +#define PCIREG_COMMAND(CMDSTATUS) (CMDSTATUS & 0xFFFF) +#define PCIREG_STATUS(CMDSTATUS) (CMDSTATUS >> 16) + +/* PCI command register bits */ +#define PCI_IO_SPACE BIT(0) /* Respond to I/O space accesses */ +#define PCI_MEM_SPACE BIT(1) /* Respond to mem space accesses */ +#define PCI_BUS_MASTERING BIT(2) /* Enable bus mastering */ +#define PCI_INT_DISABLE BIT(10) /* Interrupt disable */ + +/* PCI status register bits */ +#define PCI_STATUS_CAPLIST BIT(4) +#define PCI_STATUS_66MHZ BIT(5) + +#endif /* _PCI_PCIREGS_H_ */ -- cgit v1.2.3