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