| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * cb710/cb710.h |
| * |
| * Copyright by Michał Mirosław, 2008-2009 |
| */ |
| #ifndef LINUX_CB710_DRIVER_H |
| #define LINUX_CB710_DRIVER_H |
| |
| #include <linux/io.h> |
| #include <linux/interrupt.h> |
| #include <linux/spinlock.h> |
| #include <linux/pci.h> |
| #include <linux/platform_device.h> |
| #include <linux/mmc/host.h> |
| |
| struct cb710_slot; |
| |
| typedef int (*cb710_irq_handler_t)(struct cb710_slot *); |
| |
| /* per-virtual-slot structure */ |
| struct cb710_slot { |
| struct platform_device pdev; |
| void __iomem *iobase; |
| cb710_irq_handler_t irq_handler; |
| }; |
| |
| /* per-device structure */ |
| struct cb710_chip { |
| struct pci_dev *pdev; |
| void __iomem *iobase; |
| unsigned platform_id; |
| #ifdef CONFIG_CB710_DEBUG_ASSUMPTIONS |
| atomic_t slot_refs_count; |
| #endif |
| unsigned slot_mask; |
| unsigned slots; |
| spinlock_t irq_lock; |
| struct cb710_slot slot[]; |
| }; |
| |
| /* NOTE: cb710_chip.slots is modified only during device init/exit and |
| * they are all serialized wrt themselves */ |
| |
| /* cb710_chip.slot_mask values */ |
| #define CB710_SLOT_MMC 1 |
| #define CB710_SLOT_MS 2 |
| #define CB710_SLOT_SM 4 |
| |
| /* slot port accessors - so the logic is more clear in the code */ |
| #define CB710_PORT_ACCESSORS(t) \ |
| static inline void cb710_write_port_##t(struct cb710_slot *slot, \ |
| unsigned port, u##t value) \ |
| { \ |
| iowrite##t(value, slot->iobase + port); \ |
| } \ |
| \ |
| static inline u##t cb710_read_port_##t(struct cb710_slot *slot, \ |
| unsigned port) \ |
| { \ |
| return ioread##t(slot->iobase + port); \ |
| } \ |
| \ |
| static inline void cb710_modify_port_##t(struct cb710_slot *slot, \ |
| unsigned port, u##t set, u##t clear) \ |
| { \ |
| iowrite##t( \ |
| (ioread##t(slot->iobase + port) & ~clear)|set, \ |
| slot->iobase + port); \ |
| } |
| |
| CB710_PORT_ACCESSORS(8) |
| CB710_PORT_ACCESSORS(16) |
| CB710_PORT_ACCESSORS(32) |
| |
| void cb710_pci_update_config_reg(struct pci_dev *pdev, |
| int reg, uint32_t and, uint32_t xor); |
| void cb710_set_irq_handler(struct cb710_slot *slot, |
| cb710_irq_handler_t handler); |
| |
| /* some device struct walking */ |
| |
| static inline struct cb710_slot *cb710_pdev_to_slot( |
| struct platform_device *pdev) |
| { |
| return container_of(pdev, struct cb710_slot, pdev); |
| } |
| |
| static inline struct cb710_chip *cb710_slot_to_chip(struct cb710_slot *slot) |
| { |
| return dev_get_drvdata(slot->pdev.dev.parent); |
| } |
| |
| static inline struct device *cb710_slot_dev(struct cb710_slot *slot) |
| { |
| return &slot->pdev.dev; |
| } |
| |
| static inline struct device *cb710_chip_dev(struct cb710_chip *chip) |
| { |
| return &chip->pdev->dev; |
| } |
| |
| /* debugging aids */ |
| |
| #ifdef CONFIG_CB710_DEBUG |
| void cb710_dump_regs(struct cb710_chip *chip, unsigned dump); |
| #else |
| #define cb710_dump_regs(c, d) do {} while (0) |
| #endif |
| |
| #define CB710_DUMP_REGS_MMC 0x0F |
| #define CB710_DUMP_REGS_MS 0x30 |
| #define CB710_DUMP_REGS_SM 0xC0 |
| #define CB710_DUMP_REGS_ALL 0xFF |
| #define CB710_DUMP_REGS_MASK 0xFF |
| |
| #define CB710_DUMP_ACCESS_8 0x100 |
| #define CB710_DUMP_ACCESS_16 0x200 |
| #define CB710_DUMP_ACCESS_32 0x400 |
| #define CB710_DUMP_ACCESS_ALL 0x700 |
| #define CB710_DUMP_ACCESS_MASK 0x700 |
| |
| #endif /* LINUX_CB710_DRIVER_H */ |
| /* |
| * cb710/sgbuf2.h |
| * |
| * Copyright by Michał Mirosław, 2008-2009 |
| */ |
| #ifndef LINUX_CB710_SG_H |
| #define LINUX_CB710_SG_H |
| |
| #include <linux/highmem.h> |
| #include <linux/scatterlist.h> |
| |
| /* |
| * 32-bit PIO mapping sg iterator |
| * |
| * Hides scatterlist access issues - fragment boundaries, alignment, page |
| * mapping - for drivers using 32-bit-word-at-a-time-PIO (ie. PCI devices |
| * without DMA support). |
| * |
| * Best-case reading (transfer from device): |
| * sg_miter_start(, SG_MITER_TO_SG); |
| * cb710_sg_dwiter_write_from_io(); |
| * sg_miter_stop(); |
| * |
| * Best-case writing (transfer to device): |
| * sg_miter_start(, SG_MITER_FROM_SG); |
| * cb710_sg_dwiter_read_to_io(); |
| * sg_miter_stop(); |
| */ |
| |
| uint32_t cb710_sg_dwiter_read_next_block(struct sg_mapping_iter *miter); |
| void cb710_sg_dwiter_write_next_block(struct sg_mapping_iter *miter, uint32_t data); |
| |
| /** |
| * cb710_sg_dwiter_write_from_io - transfer data to mapped buffer from 32-bit IO port |
| * @miter: sg mapping iter |
| * @port: PIO port - IO or MMIO address |
| * @count: number of 32-bit words to transfer |
| * |
| * Description: |
| * Reads @count 32-bit words from register @port and stores it in |
| * buffer iterated by @miter. Data that would overflow the buffer |
| * is silently ignored. Iterator is advanced by 4*@count bytes |
| * or to the buffer's end whichever is closer. |
| * |
| * Context: |
| * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. |
| */ |
| static inline void cb710_sg_dwiter_write_from_io(struct sg_mapping_iter *miter, |
| void __iomem *port, size_t count) |
| { |
| while (count-- > 0) |
| cb710_sg_dwiter_write_next_block(miter, ioread32(port)); |
| } |
| |
| /** |
| * cb710_sg_dwiter_read_to_io - transfer data to 32-bit IO port from mapped buffer |
| * @miter: sg mapping iter |
| * @port: PIO port - IO or MMIO address |
| * @count: number of 32-bit words to transfer |
| * |
| * Description: |
| * Writes @count 32-bit words to register @port from buffer iterated |
| * through @miter. If buffer ends before @count words are written |
| * missing data is replaced by zeroes. @miter is advanced by 4*@count |
| * bytes or to the buffer's end whichever is closer. |
| * |
| * Context: |
| * IRQ disabled if the SG_MITER_ATOMIC is set. Don't care otherwise. |
| */ |
| static inline void cb710_sg_dwiter_read_to_io(struct sg_mapping_iter *miter, |
| void __iomem *port, size_t count) |
| { |
| while (count-- > 0) |
| iowrite32(cb710_sg_dwiter_read_next_block(miter), port); |
| } |
| |
| #endif /* LINUX_CB710_SG_H */ |