2013-07-31 16:14:10 +08:00
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/*
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* Synopsys Designware PCIe host controller driver
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*
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* Copyright (C) 2013 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Author: Jingoo Han <jg1.han@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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2013-10-09 23:12:21 +08:00
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#ifndef _PCIE_DESIGNWARE_H
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#define _PCIE_DESIGNWARE_H
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2013-09-06 14:54:59 +08:00
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/*
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* Maximum number of MSI IRQs can be 256 per controller. But keep
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* it 32 as of now. Probably we will never need more than 32. If needed,
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* then increment it in multiple of 32.
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*/
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#define MAX_MSI_IRQS 32
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#define MAX_MSI_CTRLS (MAX_MSI_IRQS / 32)
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2013-07-31 16:14:10 +08:00
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struct pcie_port {
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struct device *dev;
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u8 root_bus_nr;
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void __iomem *dbi_base;
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u64 cfg0_base;
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void __iomem *va_cfg0_base;
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2014-09-06 07:48:54 +08:00
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u32 cfg0_size;
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2013-07-31 16:14:10 +08:00
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u64 cfg1_base;
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void __iomem *va_cfg1_base;
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2014-09-06 07:48:54 +08:00
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u32 cfg1_size;
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2015-10-30 08:57:06 +08:00
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resource_size_t io_base;
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2014-09-06 07:48:54 +08:00
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phys_addr_t io_bus_addr;
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u32 io_size;
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2013-07-31 16:14:10 +08:00
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u64 mem_base;
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2014-09-06 07:48:54 +08:00
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phys_addr_t mem_bus_addr;
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u32 mem_size;
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2015-10-30 08:57:06 +08:00
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struct resource *cfg;
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struct resource *io;
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struct resource *mem;
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struct resource *busn;
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2013-07-31 16:14:10 +08:00
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int irq;
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u32 lanes;
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2016-07-05 00:14:42 +08:00
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u32 num_viewport;
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2013-07-31 16:14:10 +08:00
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struct pcie_host_ops *ops;
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2013-09-06 14:54:59 +08:00
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int msi_irq;
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2013-10-09 20:32:12 +08:00
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struct irq_domain *irq_domain;
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2013-09-06 14:54:59 +08:00
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unsigned long msi_data;
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2016-08-10 18:02:39 +08:00
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u8 iatu_unroll_enabled;
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2013-09-06 14:54:59 +08:00
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DECLARE_BITMAP(msi_irq_in_use, MAX_MSI_IRQS);
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2013-07-31 16:14:10 +08:00
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};
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struct pcie_host_ops {
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2016-10-07 02:25:46 +08:00
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u32 (*readl_rc)(struct pcie_port *pp, u32 reg);
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2016-10-07 02:25:46 +08:00
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void (*writel_rc)(struct pcie_port *pp, u32 reg, u32 val);
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2013-07-31 16:14:10 +08:00
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int (*rd_own_conf)(struct pcie_port *pp, int where, int size, u32 *val);
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int (*wr_own_conf)(struct pcie_port *pp, int where, int size, u32 val);
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2014-07-22 00:58:41 +08:00
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int (*rd_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
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unsigned int devfn, int where, int size, u32 *val);
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int (*wr_other_conf)(struct pcie_port *pp, struct pci_bus *bus,
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unsigned int devfn, int where, int size, u32 val);
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2013-07-31 16:14:10 +08:00
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int (*link_up)(struct pcie_port *pp);
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void (*host_init)(struct pcie_port *pp);
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2014-07-22 00:58:42 +08:00
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void (*msi_set_irq)(struct pcie_port *pp, int irq);
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void (*msi_clear_irq)(struct pcie_port *pp, int irq);
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2015-09-19 02:58:35 +08:00
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phys_addr_t (*get_msi_addr)(struct pcie_port *pp);
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2014-09-23 22:28:59 +08:00
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u32 (*get_msi_data)(struct pcie_port *pp, int pos);
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2014-07-24 02:54:51 +08:00
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void (*scan_bus)(struct pcie_port *pp);
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2014-11-12 08:45:45 +08:00
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int (*msi_host_init)(struct pcie_port *pp, struct msi_controller *chip);
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2013-07-31 16:14:10 +08:00
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};
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2016-10-07 02:25:47 +08:00
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u32 dw_pcie_readl_rc(struct pcie_port *pp, u32 reg);
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void dw_pcie_writel_rc(struct pcie_port *pp, u32 reg, u32 val);
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2015-10-09 03:27:48 +08:00
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int dw_pcie_cfg_read(void __iomem *addr, int size, u32 *val);
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int dw_pcie_cfg_write(void __iomem *addr, int size, u32 val);
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2014-03-29 00:52:58 +08:00
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irqreturn_t dw_handle_msi_irq(struct pcie_port *pp);
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2013-09-06 14:54:59 +08:00
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void dw_pcie_msi_init(struct pcie_port *pp);
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PCI: designware: Add generic dw_pcie_wait_for_link()
Several DesignWare-based drivers (dra7xx, exynos, imx6, keystone, qcom, and
spear13xx) had similar loops waiting for the link to come up.
Add a generic dw_pcie_wait_for_link() for use by all these drivers so the
waiting is done consistently, e.g., always using usleep_range() rather than
mdelay() and using similar timeouts and retry counts.
Note that this changes the Keystone link training/wait for link strategy,
so we initiate link training, then wait longer for the link to come up
before re-initiating link training.
[bhelgaas: changelog, split into its own patch, update pci-keystone.c, pcie-qcom.c]
Signed-off-by: Joao Pinto <jpinto@synopsys.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Pratyush Anand <pratyush.anand@gmail.com>
2016-03-11 04:44:35 +08:00
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int dw_pcie_wait_for_link(struct pcie_port *pp);
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2013-07-31 16:14:10 +08:00
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int dw_pcie_link_up(struct pcie_port *pp);
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void dw_pcie_setup_rc(struct pcie_port *pp);
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int dw_pcie_host_init(struct pcie_port *pp);
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2013-10-09 23:12:21 +08:00
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#endif /* _PCIE_DESIGNWARE_H */
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